US20120055826A1 - Housing Case, Method for Manufacturing Housing Case, and Glass Insert Molding Die Used in Same - Google Patents
Housing Case, Method for Manufacturing Housing Case, and Glass Insert Molding Die Used in Same Download PDFInfo
- Publication number
- US20120055826A1 US20120055826A1 US13/294,509 US201113294509A US2012055826A1 US 20120055826 A1 US20120055826 A1 US 20120055826A1 US 201113294509 A US201113294509 A US 201113294509A US 2012055826 A1 US2012055826 A1 US 2012055826A1
- Authority
- US
- United States
- Prior art keywords
- flat plate
- housing case
- resin
- resin frame
- glass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/02—Details
- H05K5/0217—Mechanical details of casings
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K5/00—Casings, cabinets or drawers for electric apparatus
- H05K5/0017—Casings, cabinets or drawers for electric apparatus with operator interface units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C45/14073—Positioning or centering articles in the mould using means being retractable during injection
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
- C03B11/06—Construction of plunger or mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14065—Positioning or centering articles in the mould
- B29C2045/14155—Positioning or centering articles in the mould using vacuum or suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14688—Coating articles provided with a decoration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
- B29C45/401—Ejector pin constructions or mountings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
- B29K2709/08—Glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3431—Telephones, Earphones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/44—Furniture or parts thereof
- B29L2031/445—Cabinets
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/0279—Improving the user comfort or ergonomics
- H04M1/0283—Improving the user comfort or ergonomics for providing a decorative aspect, e.g. customization of casings, exchangeable faceplate
Definitions
- the present invention relates to a housing case for a small electric device and communication device, the front portion of the housing case; in particular, the portion of the housing case that covers an LCD or any other display screen having been adequately hardened, and also relates to a method for manufacturing the housing case and a glass insert molding die used in the same.
- Small electric devices and communication devices such as a digital audio player and a mobile phone, which can be placed in clothing or in a bag and carried, are often subject to impact on their surfaces when they are accidentally dropped or hit with other articles in the bag.
- Patent Document 1 discloses a housing case 100 (see FIG. 38) manufactured from a continuous film having a peelable layer, a hard coat layer 103, a printed layer, and an adhesive layer successively stacked on a base film.
- the hard coat layer 103 comprises layered hard coats for hardening the front portion of the housing case 100, and the printed layer includes a plurality of printed patterns, each of which having a non-printed portion 102.
- the housing case 100 is manufactured by continuously passing the continuous film through a glass insert molding die, injecting a transparent synthetic resin onto the adhesive layer of the continuous film in the glass insert molding die, and drawing the continuous film into the shape of the cavity of the glass insert molding die so as to form a synthetic resin layer 101. After the synthetic resin layer has hardened, the hard coat layer 103, the printed layer, the adhesive layer, and the synthetic resin layer 101 are removed from the base film and the peelable layer.
- reference numeral 104 denotes a display window that covers an LCD display screen
- reference numeral 105 denotes a button hole.
- the hard coat layer 103 is typically manufactured by forming a thin coated film, ranging from approximately 3 to 10 ⁇ m in thickness, made of a thermoset resin, a UV curable resin, or any other suitable active energy radiation polymerizable resin on a plastic substrate directly or with an interposed primer layer having a thickness ranging from 0.03 to 0.5 ⁇ m.
- the hard coat layer 103 comprising a thin coated film, however, is not hard enough as the front portion of the housing case; in particular, the portion that covers an LCD or any other display screen where high hardness is required.
- An object of the invention is to provide a housing case, the front portion of the housing case; in particular, the portion of the housing case that covers an LCD or any other display screen, being adequately hardened.
- Other objects of the invention are to provide a method for manufacturing the housing case and a glass insert molding die used in the same.
- a housing case according to the invention is characterized in that the housing case is used for a small electric device or communication device, and comprises a flat plate having a dimension substantially the same as that of a front portion of the housing case and comprising at least a glass plate; and a resin frame integrated with the flat plate to support a backside periphery of the flat plate.
- the flat plate preferably has decoration on a rear surface of the glass plate.
- the device preferably includes a display device, and the flat plate preferably has decoration on the front surface and/or the rear surface of the glass plate except at least a display window for the display device.
- the rear surface of the glass plate is preferably not decorated, and the rear surface of the glass plate is preferably integrated with the resin frame with an adhesive layer for glass, a primer layer, and an adhesive layer for resin interposed between the rear surface of the glass plate and the resin frame.
- the rear surface of the glass plate is preferably decorated, and the layer having the decoration also preferably serves as an adhesive layer for glass in the portion where the rear surface of the flat plate is integrated with the resin frame.
- the rear surface of the flat plate is preferably integrated with the resin frame with a primer layer and an adhesive layer for resin interposed between the rear surface of the flat plate and the resin frame.
- the flat plate preferably has an opening.
- the housing case preferably further comprises an opening resin frame integrated with the flat plate to support the surrounding portion of the opening.
- the resin frame preferably covers a side surface of the flat plate.
- the integrated flat plate and resin frame preferably has a box shape.
- the resin frame preferably supports an entire backside periphery of the flat plate.
- the resin frame preferably supports one, two, or three sides of the backside periphery of the flat plate.
- a plurality of divided portions of the resin frame preferably support the backside periphery of the flat plate.
- the resin frame is preferably made of a resin material having a molding shrinkage rate of 0.6% or lower.
- a glass insert molding die used to form a housing case according to the invention is characterized in that the glass insert molding die comprises a stationary die and a movable die that sandwich a flat plate primarily comprised of a glass plate when the dies are closed and form a cavity that faces periphery of the flat plate facing the stationary die and also an end surface of the flat plate.
- the glass insert molding die is also characterized in that the stationary die includes a sliding core having a bottom portion that comes into contact with the periphery of the flat plate facing the stationary die and a wall portion that is connected to the bottom portion and positionably comes into contact with the end surface of the flat plate, the bottom portion and the wall portion provided at the front end of the sliding core; and a suction hole provided in the surface where the flat plate is sandwiched.
- the glass insert molding die is also characterized in that the sliding core can be advanced and retracted in the die-closing direction between a flat plate positioning position and a cavity forming position, the flat plate positioning position being the position where the front-end bottom portion does not protrude from the surface of the stationary die where the flat plate is sandwiched but the front-end wall portion comes into contact with the flat plate, and the cavity forming position being the position where the front-end bottom portion and the front-end wall portion are separated from the flat plate.
- the sliding core is partially provided along the entire perimeter of the flat plate.
- the sliding core is further capable of being advanced to a glass insert mold pushing position where the front-end bottom portion protrudes from the surface of the stationary die where the flat plate is sandwiched.
- a method for manufacturing a housing case using the glass insert molding die comprises the steps of: using the glass insert molding die, moving the sliding core to the flat plate positioning position and then placing the flat plate on the surface of the stationary die where the flat plate is sandwiched; suctioning and securing the positioned flat plate on the surface where the flat plate is sandwiched; closing the stationary die to which the flat plate has adhered and the movable die; and after the dies are closed, moving the sliding core to the cavity forming position and then injecting a molten resin into the cavity to integrate a resin frame with the flat plate.
- a method for manufacturing a housing case using the glass insert molding die according to the invention comprises the steps of: using the glass insert molding die including the pushing mechanism, moving the sliding core to the flat plate positioning position, and then placing the flat plate on the surface of the stationary die where the flat plate is sandwiched; suctioning and securing the positioned flat plate on the surface where the flat plate is sandwiched; closing the stationary die to which the flat plate has adhered and the movable die; after the dies are closed, moving the sliding core to the cavity forming position and then injecting a molten resin into the cavity to integrate a resin frame with the flat plate; and opening the dies and then moving the sliding core to the glass insert mold pushing position.
- the flat plate preferably has decoration on the glass plate.
- the flat plate preferably has an adhesive layer for glass, a primer layer, and an adhesive layer for resin sequentially formed on the glass plate.
- the portion where the flat plate is sandwiched between the stationary die and the movable die preferably has an opening.
- the material of the molten resin preferably has a molding shrinkage rate of 0.6% or lower.
- the housing case of the invention includes a flat plate comprising a glass plate and a resin frame integrated with the flat plate to support the backside periphery of the flat plate, the front portion of the housing case; in particular, the portion that covers an LCD or any other display screen, can be adequately hardened.
- the glass insert molding die and the method for manufacturing a housing case of the invention can provide a housing case in which a resin frame is integrated with a flat plate primarily comprising a glass plate to support the backside periphery thereof, the front portion of the housing case; in particular, the portion that covers an LCD or any other display screen, can be adequately hardened. Further, since the sliding core provided in the glass insert molding die not only forms a cavity for molding the resin frame for supporting the backside periphery but also serves as a mechanism for positioning the flat plate as well as a mechanism for pushing the glass insert mold as required, the housing case can be manufactured at a low cost.
- FIG. 1 is a perspective view showing an embodiment of a housing case according to the invention
- FIG. 2 is a cross-sectional view of the housing case taken along the line II-II shown in FIG. 1 ;
- FIG. 3 is a cross-sectional view showing another embodiment of the housing case according to the invention.
- FIG. 4 is a cross-sectional view showing another embodiment of the housing case according to the invention.
- FIG. 5 is a cross-sectional view showing another embodiment of the housing case according to the invention.
- FIG. 6 is a cross-sectional view showing another embodiment of the housing case according to the invention.
- FIG. 7 is a rear view showing an embodiment of the housing case according to the invention.
- FIG. 8 is a rear view showing another embodiment of the housing case according to the invention.
- FIG. 9 is a rear view showing another embodiment of the housing case according to the invention.
- FIG. 10 is a rear view showing another embodiment of the housing case according to the invention.
- FIG. 11 is a rear view showing another embodiment of the housing case according to the invention.
- FIG. 12 is a rear view showing another embodiment of the housing case according to the invention.
- FIG. 13 is a perspective view showing another embodiment of the housing case according to the invention.
- FIG. 14 is an enlarged cross-sectional view showing an embodiment of the structure of a flat plate of the housing case according to the invention.
- FIG. 15 is an enlarged cross-sectional view showing another embodiment of the structure of the flat plate of the housing case according to the invention.
- FIG. 16 is a perspective view showing another embodiment of the housing case according to the invention.
- FIG. 17 is a perspective view showing another embodiment of the housing case according to the invention.
- FIG. 18 shows an embodiment of a stationary die of a glass insert molding die according to the invention, the stationary die viewed from a movable die side;
- FIG. 19 is a cross-sectional view of the stationary die taken along the line XIX-XIX shown in FIG. 18 ;
- FIG. 20 shows the arrangement in which the flat plate is placed in the stationary die, the arrangement viewed from the movable die side;
- FIG. 21 is a cross-sectional view of the stationary die taken along the line XXI-XXI shown in FIG. 20 ;
- FIG. 22 is a cross-sectional view showing an embodiment of a step of manufacturing the housing case according to the invention.
- FIG. 23 is a cross-sectional view showing an embodiment of a step of manufacturing the housing case according to the invention.
- FIG. 24 is a cross-sectional view showing an embodiment of a step of manufacturing the housing case according to the invention.
- FIG. 25 is a cross-sectional view showing an embodiment of a step manufacturing of the housing case according to the invention.
- FIG. 26 shows an example of the housing case obtained by using the stationary die shown in FIG. 18 ;
- FIG. 27 shows another embodiment of the stationary die of the glass insert molding die according to the invention, the stationary die viewed from the movable die side;
- FIG. 28 shows another embodiment of the stationary die of the glass insert molding die according to the invention, the stationary die viewed from the movable die side;
- FIG. 29 shows an example of the housing case obtained by using the stationary die shown in FIG. 27 ;
- FIG. 30 shows an example of the housing case obtained by using the stationary die shown in FIG. 28 ;
- FIG. 31 shows another embodiment of the stationary die of the glass insert molding die according to the invention, the stationary die viewed from the movable die side;
- FIG. 32 is a cross-sectional view of the stationary die taken along the line XXXII-XXXII shown in FIG. 31 ;
- FIG. 33 shows an example of the housing case obtained by using the stationary die shown in FIG. 31 ;
- FIG. 34 is a cross-sectional view showing another embodiment of the stationary die of the glass insert molding die according to the invention.
- FIG. 35 shows another example of the housing case obtained by using the stationary die shown in FIG. 18 ;
- FIG. 36 shows an embodiment of the glass insert molding die according to the invention in which a transfer film is sandwiched between the stationary die to which the flat plate has adhered and the movable die;
- FIG. 37 shows an example of the closed glass insert molding die shown in FIG. 36 after the transfer film is sandwiched
- FIG. 38 is a perspective view showing a housing case of related art.
- FIG. 39 is a cross-sectional view showing how molding shrinkage occurs when a glass plate, instead of a film comprising a hard coat layer, is inserted into a die and the glass plate is integrated with the whole front portion of a housing case.
- a housing case 1 shown in FIG. 1 includes a flat plate 2 having a dimension substantially the same as that of the front portion of the housing case and comprising at least a glass plate, and a resin frame 3 integrated with the flat plate 2 to support the backside periphery of the flat plate.
- the portion (b) in FIG. 1 is an exploded view of the portion (a).
- the housing case 1 is integrated with a back case (not shown), and the resultant integrated case houses a substrate on which a variety of electronic components are mounted to form a small electric device or communication device.
- the flat plate 2 comprises at least a glass plate, which can provide sufficient hardness (at least 9H) of the front portion of the housing case 1 .
- the glass plate can be any of a standard plate glass, a reinforced plate glass, a polished plate glass, and other suitable plate glass.
- the thickness of the glass plate in consideration of the strength, preferably ranges from 0.3 mm to 2.0 mm, more preferably from 0.5 mm to 2.0 mm, still more preferably from 0.8 mm to 1.5 mm.
- the inventor first planned, in the housing case of the related art, to integrate the synthetic resin layer with the flat plate 2 instead of the hard coat 103 in the front portion of the case.
- the whole flat plate 2 is in contact with the synthetic resin layer 101 in the front portion of the case.
- the synthetic resin layer 101 that has been formed in the injection molding die experiences molding shrinkage during cooling solidification, whereas the portion in contact with the whole flat plate 2 does not experience molding shrinkage, as shown in FIG. 39 . Since only one side thus experiences the molding shrinkage (in the direction indicated by the arrows in FIG. 39 , for example), the resultant housing case 106 is warped in some cases. In this case, the flat plate 2 breaks when it cannot withstand the warping.
- the resin frame 3 is employed so that only the periphery of the backside of the flat plate 2 is integrated.
- the resin frame 3 supports the entire backside periphery of the flat plate 2 . Since the resin frame 3 of the invention is not in contact with the whole flat plate 2 , molding shrinkage of the resin frame 3 , if any during the cooling solidification, will likely not affect the whole flat plate 2 . The resultant housing case will therefore not be warped.
- the resin frame 3 may be made of a polystyrene resin, a polyolefin resin, an ABS resin, an AS resin, an AN resin, or any other suitable general-purpose resin.
- Other useable materials may be a polyphenylene oxide/polystyrene resin, a polycarbonate resin, a polyacetal resin, a polyacrylic resin, a polycarbonate/denatured polyphenylene ether resin, a polybutylene terephthalate resin, an ultrahigh-molecular-weight polyethylene resin, and any other general-purpose engineering resin; and a polysulfone resin, a polyphenylene sulfide resin, a polyphenylene oxide resin, a polyallylate resin, a polyether-imide resin, a polyimide resin, a liquid crystal polyester resin, a polyallyl heat-resistant resin, and any other suitable super-engineering resin.
- a resin material having a molding shrinkage rate of 0.6% or lower is more preferably used for the resin frame 3 from the viewpoint of warping prevention, and an example of such a resin material is a polyacrylic resin.
- the resin frame 3 may or may not be colored.
- the flat plate 2 is integrated with the resin frame 3 in the following manner.
- the flat plate 2 is introduced into a molding die comprising a movable die and a stationary die, and secured in a predetermined position on the cavity surface, for example, through vacuum suction.
- a molten resin is injected through a gate into the cavity to fill it.
- the resin frame 3 is formed and at the same time bonded to the flat plate 2 .
- the molding die is opened and the integrated flat plate 2 and resin frame 3 is removed.
- the flat plate 2 can be secured without using vacuum suction or other methods.
- the integrated flat plate 2 and resin frame 3 may have a box shape (see FIGS. 2 to 4 ) or a lid shape (see FIGS. 5 and 6 : The broken line represents a counterpart back case).
- FIG. 2 is a cross-sectional view taken along the line shown in FIG. 1
- FIGS. 3 to 6 show other embodiments of that shown in FIG. 2 .
- the box shape or the lid shape setting the dimension of the flat plate 2 to be slightly smaller than that of the front portion of the housing case 1 as shown in FIGS. 2 , 5 , and 6 provides more degrees of freedom in designing the exterior appearance of the housing case 1 than a case where the dimension of the flat plate 2 is the same as that of the front portion of the housing case 1 as shown in FIGS.
- the housing case 1 in such a way that the corners thereof are rounded (see FIGS. 2 , 5 , and 6 ).
- setting the width of the portion where the flat plate 2 is integrated with resin frame 3 to be greater than the thickness of the sidewall of the box as shown in FIGS. 2 and 3 increases the area that supports the flat plate 2 accordingly, whereby the housing case 1 is more strengthened.
- the configuration of the housing case 1 of the invention is not limited to the aspect described above.
- the resin frame 3 may support one, two, or three sides of the backside periphery (see FIGS. 7 to 10 ), or a plurality of divided portions of the resin frame 3 may support the backside periphery of the flat plate 2 (see FIGS. 11 and 12 ).
- molding shrinkage of the resin frame 3 if any during the cooling solidification, will likely not affect the whole flat plate 2 .
- the housing case will less likely warp than the case where the resin frame 3 supports the entire backside periphery of the flat plate 2 .
- input/output terminals and other components are readily provided on a side surface of the housing case 1 .
- the flat plate 2 may have decoration on the backside of the glass plate (not shown). Since the glass plate has a sufficient hardness (at least 9H), it is unlikely scratched, and the decoration on the backside viewed through the glass plate will not be degraded in terms of aesthetics.
- the decoration on the backside of the glass plate is preferably formed by printing a decoration layer.
- the material of the decoration layer include a polyvinyl chloride resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, and an alkyd resin, any of which is used as a binder along with a coloring ink containing a pigment or a dye having an appropriate color as a coloring agent.
- a preferred example of the printing method is screen printing. For a solid single color, a variety of coating methods, such as spray coating, can be used.
- the decoration layer may alternatively comprise a metal thin film layer or a combination of a printed layer and a metal thin film layer.
- the metal thin film layer serves to exhibit metallic luster as the decoration layer and is formed by using vacuum deposition, sputtering, ion plating, plating, or any other suitable method.
- aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, zinc, or any other suitable metal, or any of the alloys or compounds thereof is used in accordance with the metallic luster color to be exhibited.
- a metal thin film is formed over the surface, and the solvent-soluble resin layer and the unnecessary metal thin film thereon are removed by solvent cleaning.
- the solvent used in this process is water or an aqueous solution in many cases.
- a metal thin film is formed over the surface, and a resist layer is formed on the portion where the metal thin film needs to be left. Acid or alkali is used to etch away the resist layer.
- the flat plate 2 may have decoration on the front surface and/or the rear surface of the glass plate except at least a display window for the display device (see FIG. 13 ).
- the portion (b) is an exploded view of the portion (a), and reference characters 2 A and 2 B denote a decorated portion and an undecorated portion, respectively.
- the display screen of the display device viewed through the glass plate in the undecorated portion 2 B will not be degraded in terms of clarity, because the glass plate has such a sufficient hardness (at least 9H) that it is unlikely to be scratched.
- the display screen not be degraded in terms of clarity as in the case where the front surface of the glass plate is decorated, because the glass plate has such a sufficient hardness (at least 9H) that it is unlikely to be scratched, but also the decoration on the rear surface viewed through the glass plate in the decorated portion 2 A will not be degraded in terms of aesthetics.
- the flat plate 2 of the housing case 1 of the invention may include a layer that allows the flat plate 2 to adhere more intimately to the resin frame 3 .
- a layer that allows the flat plate 2 to adhere more intimately to the resin frame 3 For example, an undecorated rear surface of a glass plate 2 E may be integrated with the resin frame 3 with an adhesive layer for glass 2 F, a primer layer 2 G, and an adhesive layer for resin 2 H interposed between the rear surface of the glass plate 2 E and the resin frame 3 (see FIG. 14 ).
- FIG. 14 is an enlarged cross-sectional view of the flat plate 2 , and reference character 2 D in FIG. 14 denotes a front surface decoration layer.
- the adhesive layer for glass 2 F may be made of a known adhesive for glass, which can be, for example, an adhesive for glass made of a polyester resin.
- the primer layer 2 G may be made of a known primer material, which can be, for example, a primer material made of a polyester resin.
- a primer material made of a polyester resin.
- the adhesive layer for resin 2 H may be made of a known adhesive for resin, which can be, for example, an adhesive for resin made of a vinyl chloride/vinyl acetate/acrylic resin.
- the flat plate 2 of the housing case 1 of the invention may alternatively include the layer described below that allows the flat plate 2 to adhere more intimately to the resin frame 3 .
- the rear surface of the glass plate 2 E is decorated, and the layer containing the decoration also serves as an adhesive layer for glass in the portion where the rear surface of the flat plate 2 is integrated with the resin frame 3 .
- the rear surface of the flat plate 2 can be integrated with the resin frame 3 with the primer layer 2 G and the adhesive layer for resin 2 H interposed between the rear surface of the flat plate 2 and the resin frame 3 (see FIG. 15 ).
- FIG. 15 is an enlarged cross-sectional view of the flat plate 2 .
- Reference character 2 I in FIG. 15 denotes the backside decoration layer, which also serves as the adhesive layer for glass in the integrated portion.
- the decorative layer/adhesive layer for glass can be made of the same material as that of the adhesive layer for glass 2 F described above but containing a pigment or a dye having an appropriate color as a coloring agent.
- the glass plate is unlikely to be scratched because it has a sufficient hardness (at least 9 H), whereby the decoration on the rear surface viewed through the glass plate will not be degraded in terms of aesthetics.
- the adhesive layer for glass 2 F, the primer layer 2 G, the adhesive layer for resin 2 H, and the decorative layer/adhesive layer for glass may be formed, for example, by screen printing.
- the flat plate 2 of the housing case 1 of the invention may have an opening 2 C (see FIG. 16 ).
- the housing case 1 shown in FIG. 16 is integrated with a back case (not shown), and the resultant integrated case houses a substrate on which a flash memory or other electronic elements, a liquid crystal panel or other display devices, a piezoelectric speaker for outputting an operating sound, a battery, and an operation panel that fits in the opening 2 C are mounted. A digital audio player is thus formed.
- the portion (b) in FIG. 16 is an exploded view of the portion (a).
- the flat plate 2 of the housing case 1 of the invention has the opening 2 C
- the thus configured housing case 1 is further strengthened.
- the opening resin frame 4 can be implemented in a variety of aspects as in the case of the resin frame 3 .
- the portion (b) in FIG. 17 is an exploded view of the portion (a).
- the housing case 1 of the invention is configured in such a way that the resin frame 3 covers the side surfaces of the flat plate 2 not to create any step as shown in FIGS. 2 , 5 , and 6 , there is no risk that the flat plate 2 is peeled off the resin frame 3 when any of the side surfaces of the flat plate 2 is caught by something when the product is in use.
- any of the housing cases 1 shown in FIGS. 26 , 29 , 30 , 33 , and 35 includes the flat plate 2 , which takes up almost all the front area of the housing case and comprises at least a glass plate, and the resin frame 3 , which supports the backside periphery of the flat plate 2 and is integrated with the flat plate 2 in such a way that the resin frame 3 covers at least the portion of the end surfaces of the flat plate 2 that is connected to the supported portion.
- the flat plate 2 which takes up almost all the front area of the housing case and comprises at least a glass plate
- the resin frame 3 which supports the backside periphery of the flat plate 2 and is integrated with the flat plate 2 in such a way that the resin frame 3 covers at least the portion of the end surfaces of the flat plate 2 that is connected to the supported portion.
- the portion (a) is a front view; the portion (b) is a rear view; and the portions (c) and (d) are cross-sectional views.
- the housing case 1 is integrated with a back case (not shown), and the resultant integrated case houses a substrate on which a variety of electronic components are mounted. A small electric device or communication device is thus formed.
- the resin frame 3 which is integrated with the periphery of the rear surface of the flat plate 2 , is insert-molded.
- the resin frame 3 supports all the backside periphery of the flat plate 2
- the resin frame 3 supports a substantially C-shaped portion obtained by cutting part of the backside periphery of the flat plate 2 . Since the resin frame 3 of the invention is not in contact with the whole flat plate 2 , molding shrinkage of the resin frame 3 , if any during the cooling solidification, will likely not affect the whole flat plate 2 . The resultant housing case will therefore not suffer from warping.
- the resin frame 3 covers the end surfaces of the flat plate 2 , there is no risk of the flat plate 2 peeling off the resin frame 3 when any of the end surfaces of the flat plate 2 is caught by something when the product is in use.
- the flat plate 2 is integrated with the resin frame 3 by using a glass insert molding die, which will be described below.
- the glass insert molding die includes a stationary die 15 and a movable die 10 that sandwich the flat plate 2 primarily comprising a glass plate when the dies are closed and form a cavity that faces not only the periphery of the flat plate 2 facing the stationary die 15 but also the end surfaces of the flat plate 2 .
- the stationary die 15 includes a sliding core 5 having a bottom portion that comes into contact with the periphery of the flat plate 2 facing the stationary die 15 (hereinafter referred to as a front-end bottom portion 5 b ) and a wall portion that is connected to the front-end bottom portion 5 b and positionally comes into contact with the end surfaces of the flat plate 2 (hereinafter referred to as a front-end wall portion 5 a ).
- the front-end wall portion 5 a and the front-end bottom portion 5 b are provided at the front end of the sliding core 5 .
- the stationary die 15 further includes suction holes 8 provided in the surface where the flat plate 2 is sandwiched (hereinafter referred to as a flat plate abutting surface 7 ) (see FIGS. 18 and 19 ).
- FIG. 19 is a cross-sectional view taken along the line XIX-XIX shown in FIG. 18 .
- the sliding core 5 is capable of being advanced and retracted using a drive unit (not shown) in the direction in which the dies are closed between a flat plate positioning position I and a cavity forming position II.
- the flat plate positioning position I is the position where the front-end bottom portion 5 b does not protrude from the surface of the stationary die 15 where the flat plate 2 is sandwiched but the front-end wall portion 5 b comes into contact with the flat plate 2 (see FIGS. 19 , 21 and 22 ).
- the cavity forming position II is the position where the front-end bottom portion 5 b and the front-end wall portion 5 a are separated from the flat plate 2 (see FIGS. 23 and 24 ).
- the sliding core 5 is capable of being advanced to a glass insert mold pushing position III where the front-end bottom portion 5 b protrudes from the flat plate abutting surface 7 of the stationary die 15 as required (see FIG. 25 ).
- the front-end bottom portion 5 b of the sliding core 5 is seamlessly connected with the flat plate abutting surface 7 of the stationary die 15 .
- a groove 14 may alternatively be formed between the front-end bottom portion 5 b and the flat plate abutting surface 7 (see FIG. 34 ).
- the area of the resin frame 3 that is integrated with the backside periphery of the flat plate 2 increases by the amount of the resin that fills the groove 14 in the molding process.
- the flat plate positioning position I may be set in such a way that the front-end bottom portion 5 b is flush with the flat plate abutting surface 7 of the stationary die 15 as shown in FIGS. 19 , 21 , and 22 .
- the flat plate positioning position I may alternatively be set in such a way that the front-end bottom portion 5 b is retracted from the flat plate abutting surface 7 of the stationary die 15 , because the flat plate 2 can be positioned as long as the front-end wall portion 5 a comes into contact with the end surfaces of the flat plate 2 .
- the front-end wall portion 5 a to positionally come into contact with the end surfaces of the flat plate 2 can be formed into two U-shaped portions facing each other when viewed in the direction perpendicular to a die parting plane 6 , for example, as shown in FIG. 18 .
- the arrangement of the front-end wall portion 5 a is, of course, not limited to the aspect described above, but the arrangement may be determined as appropriate not to misalign the flat plate 2 in accordance with the shape of the flat plate 2 .
- the front-end wall portion 5 a can be disposed at each corner of the flat plate 2 or at part of each side of the flat plate 2 .
- the flat plate 2 can have an arbitrary shape, such as a rectangle with rounded corners as shown in FIG.
- sliding cores 5 are not limited to a specific number. Moreover, the sliding core 5 may be partially provided along the perimeter of the flat plate 2 as shown in FIG. 18 , or the front-end wall portion 5 a may completely surround the flat plate 2 .
- FIG. 21 is a cross-sectional view taken along the line XXI-XXI shown in FIG. 20 .
- the flat plate 2 is suctioned and secured on the flat plate abutting surface 7 as a result of air 12 being suctioned through the suction holes 8 provided in the flat plate abutting surface 7 (see FIG. 22 ).
- the process by which the flat plate is suctioned and secured is not necessarily limited to the suctioning of air.
- suction cups may be provided on the surface where the flat plate 2 is sandwiched.
- the movable die 10 is then advanced toward the stationary die 15 to which the flat plate 2 has adhered so as to close the dies, whereby the movable die 10 and the flat plate abutting surface 7 of the stationary die 15 sandwich the flat plate 2 , and the stationary die 15 , the movable die 10 , and the flat plate 2 form a cavity 13 , which is a die space (see FIG. 23 ).
- the drive unit retracts the sliding core 5 to the position where the front-end bottom portion 5 b is separated by a predetermined distance from the backside periphery of the flat plate 2 , and a molten resin can now reach the portion that was in contact with the front-end wall portion 5 a and the front-end bottom portion 5 b of the sliding core 5 (cavity forming position II).
- the retraction of the sliding core 5 may be carried out at any of the following points in time immediately before the movable die 10 starts being advanced, during the forward movement, and immediately after the advancing movement is completed.
- the resin frame 3 is integrated with the flat plate 2 in such a way that the resin frame 3 supports the backside periphery of the flat plate 2 and covers the portion of the end surfaces of the flat plate 2 that is connected to the supported portion.
- the housing case 1 which is the glass insert mold, is thus obtained (see FIG. 24 ).
- the molten resin may be a polystyrene resin, a polyolefin resin, an ABS resin, an AS resin, an AN resin, or any other suitable general-purpose resin.
- Other useable materials may be a polyphenylene oxide/polystyrene resin, a polycarbonate resin, a polyacetal resin, a polyacrylic resin, a polycarbonate/denatured polyphenylene ether resin, a polybutylene terephthalate resin, an ultrahigh-molecular-weight polyethylene resin, and any other general-purpose engineering resin; and a polysulfone resin, a polyphenylene sulfide resin, a polyphenylene oxide resin, a polyallylate resin, a polyether-imide resin, a polyimide resin, a liquid crystal polyester resin, a polyallyl heat-resistant resin, and any other suitable super-engineering resin.
- a resin material having a molding shrinkage rate of 0.6% or lower is more preferably used for the resin frame 3 in terms of preventing warping, and an example of such a resin material is a polyacrylic resin.
- the resin frame 3 may or may not be colored.
- the drive unit forwards the sliding core 5 to the glass insert mold pushing position III (see FIG. 25 ).
- the sliding core 5 serves as an ejector pin, and the housing case 1 is smoothly separated from the stationary die 15 .
- the housing case 1 can thus be readily removed from the die device.
- the sliding core 5 is not necessarily used to push the glass insert mold.
- the sliding core 5 not only forms the cavity for molding the resin frame 3 for supporting the backside periphery but also serves as the mechanism for positioning the flat plate 2 as well as the mechanism for pushing the glass insert mold as required, the housing case 1 can be manufactured at a low cost.
- the integrated flat plate 2 and resin frame 3 may have a lid shape (see FIGS. 26 , 29 , and 30 ) or a box shape (see FIGS. 33 and 35 ).
- FIGS. 26( c ) and 26 ( d ) are cross-sectional views taken along the lines XXVIc-XXVIc and XXVId-XXVId in FIG. 26( b ), respectively.
- FIGS. 29( c ) and 29 ( d ) are cross-sectional views taken along the lines XXIXc-XXIXc and XXIXd-XXIXd in FIG. 29( b ), respectively.
- FIGS. 33( c ) and 30 ( d ) are cross-sectional views taken along the lines XXXc-XXXc and XXXd-XXXd in FIG. 30( b ), respectively. Even when the box shape is employed, it is conceivable that a box sidewall cavity is formed outside the sliding core 5 as shown in FIG. 33 , or a sidewall cavity is formed by refracting the sliding core 5 as shown in FIG. 35 . The same notation as that used in the above cases applies to FIGS. 33 and 35 .
- FIGS. 33( c ) and 33 ( d ) are cross-sectional views taken along the lines XXXIIIc-XXXIIIc and XXXIIId-XXXIIId in FIG.
- FIGS. 35( c ) and 35 ( d ) are cross-sectional views taken along the lines XXXVc-XXXVc and XXXVd-XXXVd in FIG. 35( b ), respectively.
- the portions that do not correspond to the sliding core 5 are not necessarily integrated with the resin frame 3 as shown in FIGS. 26 , 33 , and 35 .
- the end surface that does not correspond to the sliding core 5 may be integrated with the resin frame 3 as shown in FIG. 29 , or the backside periphery or end surface that does not correspond to the sliding core 5 may not integrated with the resin frame 3 as shown in FIG. 30 .
- the flat plate abutting surface 7 in FIG. 18 is extended to the lower inner wall of a cavity forming portion 9 as shown in FIG.
- the flat plate abutting surface 7 in FIG. 18 is not changed but the lower inner wall of the cavity forming portion 9 is shifted to the lower end of the flat plate abutting surface 7 as shown in FIG. 28 so that the corresponding portions of the backside periphery and the end surface of the glass plate 2 are not filled with the molten resin.
- the flat plate 2 may be a decorated glass plate as shown in FIGS. 26 , 29 , 30 , 33 , and 35 , or may be an undecorated, skeleton glass plate.
- reference character 2 A denotes the decorated portion
- reference character 2 B denotes the undecorated portion, which becomes a transparent window.
- the decoration on the rear surface of the glass plate is formed by printing a decoration layer.
- the material of the decoration layer may include a polyvinyl chloride resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, and an alkyd resin, any of which is used as a binder along with a coloring ink containing a pigment or a dye having an appropriate color as a coloring agent.
- An example of the printing method may be screen printing. For a solid single color, a variety of coating methods, such as spray coating, can be used.
- the decoration layer may alternatively comprise a metal thin film layer or a combination of a printed layer and a metal thin film layer.
- the metal thin film layer serves to exhibit metallic luster as the decoration layer and is formed by using vacuum deposition, sputtering, ion plating, plating, or any other suitable method.
- aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, zinc, or any other suitable metal, or any of the alloys or compounds thereof is used in accordance with the metallic luster color to be exhibited.
- a metal thin film is formed over the surface, and the solvent-soluble resin layer and the unnecessary metal thin film thereon are removed by solvent cleaning.
- the solvent used in this process is water or an aqueous solution in many cases.
- a metal thin film is formed over the surface, and a resist layer is formed on the portion where the metal thin film needs to be left. Acid or alkali is used to etch away the resist layer.
- Roughening the surface of the flat plate 2 that is integrated with the resin frame 3 allows the flat plate 2 to more intimately adhere to the resin frame 3 .
- the glass insert molding die of the invention may include simultaneous molding/painting means 16 for allowing a transfer film 17 to be sandwiched between the stationary die 15 to which the flat plate 2 has adhered and the movable die 10 (see FIG. 36 ). After the transfer film 17 is sandwiched between the stationary die 15 to which the flat plate 2 has adhered and the movable die 10 , and the dies are closed (see FIG. 37 ), the painting portion of the transfer film 17 can be transferred to the resin frame 3 integrated with the flat plate 2 simultaneously with the injection of the molten resin.
- the glass insert molding die of the invention also serves as a simultaneous molding/transferring die.
- the transfer film 17 includes a transfer layer on an elongated base sheet.
- the transfer layer has a peelable layer, a pattern layer, an adhesive layer, and other layers sequentially stacked.
- the peelable layer allows the transfer layer to be peeled off the base sheet.
- the pattern layer provides the surface of an injection-molded piece with decorative appearance and functionality. Examples of the pattern layer include a typical printed pattern and a conductive pattern made of a conductive material.
- the adhesive layer bonds the transfer layer to the resin frame 3 , which is the molded piece.
- the transfer film 17 may be adapted in such a way that a film feeding device shown in FIG. 36 feeds the painting portion of the transfer film 17 between the dies by a predetermined length at a time.
- a plurality of transfer film sheets may be fed sheet by sheet.
- a glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate.
- a decorative layer was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder.
- An adhesive layer for glass made of a polyester resin, a primer layer made of a polyester resin, and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the undecorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- the flat plate was introduced into a molding die comprising a movable die and a stationary die, and secured in a predetermined position on the cavity surface through vacuum suction. After the molding die was closed, a molten polyacrylic resin was injected through the gate to fill the cavity. A rectangular resin frame was formed, and at the same time the resin frame was bonded to the undecorated surface of the flat plate with the adhesive layer for resin, the primer layer, and the adhesive layer for glass interposed between the resin frame and the undecorated surface of the flat plate. After the resin frame was cooled, the molding die was opened to remove the resin frame integrated with the entire backside periphery of the flat plate. A digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius R of 1 mm was thus obtained.
- a glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate.
- a decorative layer/adhesive layer for glass was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder.
- a primer layer made of a polyester resin and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the decorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- the flat plate was introduced into the molding die comprising the movable die and the stationary die, and secured in a predetermined position on the cavity surface through vacuum suction. After the molding die was closed, a molten polyacrylic resin was injected through the gate to fill the cavity. A rectangular resin frame was formed, and at the same time the resin frame was bonded to the decorated surface of the flat plate with the adhesive layer for resin and the primer layer interposed between the resin frame and the decorated surface of the flat plate. After the resin frame was cooled, the molding die was opened to remove the resin frame integrated with the entire backside periphery of the flat plate. A digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius of 1 mm was thus obtained.
- Example 3 only differs from Example 1 in that the adhesive layer for glass, the primer layer, and the adhesive layer for resin were sequentially formed on not only the periphery of the glass plate but also the entire surrounding portion of the opening in the undecorated surface of the flat plate to form a flat plate; a rectangular resin frame and a circular opening resin frame were formed by using injection molding; and at the same time, the resin frame and the opening resin frame were bonded to the undecorated surface of the flat plate with the adhesive layer for resin, the primer layer, the adhesive layer for glass interposed between the resin frames and the undecorated surface of the flat plate.
- Example 4 only differs from Example 2 in that the primer layer and the adhesive layer for resin were sequentially formed on not only the periphery of the glass plate but also the entire surrounding portion of the opening in the decorated surface of the flat plate to form a flat plate; a rectangular resin frame and a circular opening resin frame were formed by using injection molding; and at the same time, the resin frame and the opening resin frame were bonded to the decorated surface of the flat plate with the adhesive layer for resin and the primer layer interposed between the resin frames and the decorated surface of the flat plate.
- Example 5 only differs from Example 3 in that the resin frame is divided into two.
- Example 6 only differs from Example 4 in that each of the resin frame and the opening resin frame is divided into two.
- a glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate.
- a decoration layer was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder.
- An adhesive layer for glass made of a polyester resin, a primer layer made of a polyester resin, and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the undecorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- the glass insert molding die of the invention described above was used.
- the flat plate was placed on the surface of the stationary die where the flat plate was sandwiched, and the positioned flat plate was suctioned by suctioning air through the suction holes and secured on the surface where the flat plate to be sandwiched.
- the stationary die to which the flat plate had adhered and the movable die were closed, and the sliding core was moved to the cavity forming position, a molten resin was injected into the cavity to integrate the flat plate with a resin frame.
- the sliding core was moved to the glass insert mold pushing position and the glass insert mold was removed.
- a digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius of 1 mm was thus obtained.
- a glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate.
- a decorative layer/adhesive layer for glass was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder.
- a primer layer made of a polyester resin and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the decorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- the glass insert molding was performed in the same manner as Example 7, and a digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius of 1 mm was obtained.
- the front portion of the case in particular, the portion that covers the display screen, such as an LCD, was adequately hardened.
- the invention is preferably applicable to a housing case, for example, for a small electric device and communication device, a method for manufacturing the housing case, and a glass insert molding die used in the same.
Abstract
A housing case (1) for a small electric device and communication device includes a flat plate (2) having a dimension substantially the same as that of the front portion of the housing case and comprising at least a glass plate, and a resin frame (3) integrated with the flat plate (2) to support the backside periphery of the flat plate (2).
Description
- This application is a division of U.S. patent application Ser. No. 12/441,635 filed Sep. 20, 2007 which is incorporated herein by reference in its entirety.
- The present invention relates to a housing case for a small electric device and communication device, the front portion of the housing case; in particular, the portion of the housing case that covers an LCD or any other display screen having been adequately hardened, and also relates to a method for manufacturing the housing case and a glass insert molding die used in the same.
- Small electric devices and communication devices, such as a digital audio player and a mobile phone, which can be placed in clothing or in a bag and carried, are often subject to impact on their surfaces when they are accidentally dropped or hit with other articles in the bag.
- To address the problem, the housing case of such a device needs to have a highly robust hard coat layer coated on the front portion of the housing case; in particular, the portion that covers an LCD or any other display screen, in order to enhance scratch resistance. For example,
Patent Document 1 discloses a housing case 100 (see FIG. 38) manufactured from a continuous film having a peelable layer, ahard coat layer 103, a printed layer, and an adhesive layer successively stacked on a base film. Thehard coat layer 103 comprises layered hard coats for hardening the front portion of thehousing case 100, and the printed layer includes a plurality of printed patterns, each of which having a non-printedportion 102. Thehousing case 100 is manufactured by continuously passing the continuous film through a glass insert molding die, injecting a transparent synthetic resin onto the adhesive layer of the continuous film in the glass insert molding die, and drawing the continuous film into the shape of the cavity of the glass insert molding die so as to form asynthetic resin layer 101. After the synthetic resin layer has hardened, thehard coat layer 103, the printed layer, the adhesive layer, and thesynthetic resin layer 101 are removed from the base film and the peelable layer. In FIG. 38,reference numeral 104 denotes a display window that covers an LCD display screen, andreference numeral 105 denotes a button hole. - The
hard coat layer 103 is typically manufactured by forming a thin coated film, ranging from approximately 3 to 10 μm in thickness, made of a thermoset resin, a UV curable resin, or any other suitable active energy radiation polymerizable resin on a plastic substrate directly or with an interposed primer layer having a thickness ranging from 0.03 to 0.5 μm. - The
hard coat layer 103 comprising a thin coated film, however, is not hard enough as the front portion of the housing case; in particular, the portion that covers an LCD or any other display screen where high hardness is required. - The invention has therefore been contrived in view of the above problem. An object of the invention is to provide a housing case, the front portion of the housing case; in particular, the portion of the housing case that covers an LCD or any other display screen, being adequately hardened. Other objects of the invention are to provide a method for manufacturing the housing case and a glass insert molding die used in the same.
- [Patent Document 1] Japanese Laid-open Patent Application No. 2001-36258
- To achieve the above objects, a housing case according to the invention is characterized in that the housing case is used for a small electric device or communication device, and comprises a flat plate having a dimension substantially the same as that of a front portion of the housing case and comprising at least a glass plate; and a resin frame integrated with the flat plate to support a backside periphery of the flat plate.
- In the housing case, the flat plate preferably has decoration on a rear surface of the glass plate.
- In the housing case, the device preferably includes a display device, and the flat plate preferably has decoration on the front surface and/or the rear surface of the glass plate except at least a display window for the display device.
- In the housing case, the rear surface of the glass plate is preferably not decorated, and the rear surface of the glass plate is preferably integrated with the resin frame with an adhesive layer for glass, a primer layer, and an adhesive layer for resin interposed between the rear surface of the glass plate and the resin frame.
- In the housing case, the rear surface of the glass plate is preferably decorated, and the layer having the decoration also preferably serves as an adhesive layer for glass in the portion where the rear surface of the flat plate is integrated with the resin frame. The rear surface of the flat plate is preferably integrated with the resin frame with a primer layer and an adhesive layer for resin interposed between the rear surface of the flat plate and the resin frame.
- In the housing case, the flat plate preferably has an opening.
- The housing case preferably further comprises an opening resin frame integrated with the flat plate to support the surrounding portion of the opening.
- In the housing case, the resin frame preferably covers a side surface of the flat plate.
- In the housing case, the integrated flat plate and resin frame preferably has a box shape.
- In the housing case, the resin frame preferably supports an entire backside periphery of the flat plate.
- In the housing case, the resin frame preferably supports one, two, or three sides of the backside periphery of the flat plate.
- In the housing case, a plurality of divided portions of the resin frame preferably support the backside periphery of the flat plate.
- In the housing case, the resin frame is preferably made of a resin material having a molding shrinkage rate of 0.6% or lower.
- To achieve the above objects, a glass insert molding die used to form a housing case according to the invention is characterized in that the glass insert molding die comprises a stationary die and a movable die that sandwich a flat plate primarily comprised of a glass plate when the dies are closed and form a cavity that faces periphery of the flat plate facing the stationary die and also an end surface of the flat plate. The glass insert molding die is also characterized in that the stationary die includes a sliding core having a bottom portion that comes into contact with the periphery of the flat plate facing the stationary die and a wall portion that is connected to the bottom portion and positionably comes into contact with the end surface of the flat plate, the bottom portion and the wall portion provided at the front end of the sliding core; and a suction hole provided in the surface where the flat plate is sandwiched. The glass insert molding die is also characterized in that the sliding core can be advanced and retracted in the die-closing direction between a flat plate positioning position and a cavity forming position, the flat plate positioning position being the position where the front-end bottom portion does not protrude from the surface of the stationary die where the flat plate is sandwiched but the front-end wall portion comes into contact with the flat plate, and the cavity forming position being the position where the front-end bottom portion and the front-end wall portion are separated from the flat plate.
- In the glass insert molding die, it is preferable that the sliding core is partially provided along the entire perimeter of the flat plate.
- In the glass insert molding die, it is preferable that the sliding core is further capable of being advanced to a glass insert mold pushing position where the front-end bottom portion protrudes from the surface of the stationary die where the flat plate is sandwiched.
- To achieve the above objects, a method for manufacturing a housing case using the glass insert molding die according to the invention is characterized in that the method comprises the steps of: using the glass insert molding die, moving the sliding core to the flat plate positioning position and then placing the flat plate on the surface of the stationary die where the flat plate is sandwiched; suctioning and securing the positioned flat plate on the surface where the flat plate is sandwiched; closing the stationary die to which the flat plate has adhered and the movable die; and after the dies are closed, moving the sliding core to the cavity forming position and then injecting a molten resin into the cavity to integrate a resin frame with the flat plate.
- To achieve the above objects, a method for manufacturing a housing case using the glass insert molding die according to the invention is characterized in that the method comprises the steps of: using the glass insert molding die including the pushing mechanism, moving the sliding core to the flat plate positioning position, and then placing the flat plate on the surface of the stationary die where the flat plate is sandwiched; suctioning and securing the positioned flat plate on the surface where the flat plate is sandwiched; closing the stationary die to which the flat plate has adhered and the movable die; after the dies are closed, moving the sliding core to the cavity forming position and then injecting a molten resin into the cavity to integrate a resin frame with the flat plate; and opening the dies and then moving the sliding core to the glass insert mold pushing position.
- In the method for manufacturing a housing case, the flat plate preferably has decoration on the glass plate.
- In the method for manufacturing a housing case, the flat plate preferably has an adhesive layer for glass, a primer layer, and an adhesive layer for resin sequentially formed on the glass plate.
- In the method for manufacturing a housing case, the portion where the flat plate is sandwiched between the stationary die and the movable die preferably has an opening.
- In the method for manufacturing a housing case, the material of the molten resin preferably has a molding shrinkage rate of 0.6% or lower.
- The configuration of the invention described above provides the following advantages:
- Since the housing case of the invention includes a flat plate comprising a glass plate and a resin frame integrated with the flat plate to support the backside periphery of the flat plate, the front portion of the housing case; in particular, the portion that covers an LCD or any other display screen, can be adequately hardened.
- Since the glass insert molding die and the method for manufacturing a housing case of the invention can provide a housing case in which a resin frame is integrated with a flat plate primarily comprising a glass plate to support the backside periphery thereof, the front portion of the housing case; in particular, the portion that covers an LCD or any other display screen, can be adequately hardened. Further, since the sliding core provided in the glass insert molding die not only forms a cavity for molding the resin frame for supporting the backside periphery but also serves as a mechanism for positioning the flat plate as well as a mechanism for pushing the glass insert mold as required, the housing case can be manufactured at a low cost.
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FIG. 1 is a perspective view showing an embodiment of a housing case according to the invention; -
FIG. 2 is a cross-sectional view of the housing case taken along the line II-II shown inFIG. 1 ; -
FIG. 3 is a cross-sectional view showing another embodiment of the housing case according to the invention; -
FIG. 4 is a cross-sectional view showing another embodiment of the housing case according to the invention; -
FIG. 5 is a cross-sectional view showing another embodiment of the housing case according to the invention; -
FIG. 6 is a cross-sectional view showing another embodiment of the housing case according to the invention; -
FIG. 7 is a rear view showing an embodiment of the housing case according to the invention; -
FIG. 8 is a rear view showing another embodiment of the housing case according to the invention; -
FIG. 9 is a rear view showing another embodiment of the housing case according to the invention; -
FIG. 10 is a rear view showing another embodiment of the housing case according to the invention; -
FIG. 11 is a rear view showing another embodiment of the housing case according to the invention; -
FIG. 12 is a rear view showing another embodiment of the housing case according to the invention; -
FIG. 13 is a perspective view showing another embodiment of the housing case according to the invention; -
FIG. 14 is an enlarged cross-sectional view showing an embodiment of the structure of a flat plate of the housing case according to the invention; -
FIG. 15 is an enlarged cross-sectional view showing another embodiment of the structure of the flat plate of the housing case according to the invention; -
FIG. 16 is a perspective view showing another embodiment of the housing case according to the invention; -
FIG. 17 is a perspective view showing another embodiment of the housing case according to the invention; -
FIG. 18 shows an embodiment of a stationary die of a glass insert molding die according to the invention, the stationary die viewed from a movable die side; -
FIG. 19 is a cross-sectional view of the stationary die taken along the line XIX-XIX shown inFIG. 18 ; -
FIG. 20 shows the arrangement in which the flat plate is placed in the stationary die, the arrangement viewed from the movable die side; -
FIG. 21 is a cross-sectional view of the stationary die taken along the line XXI-XXI shown inFIG. 20 ; -
FIG. 22 is a cross-sectional view showing an embodiment of a step of manufacturing the housing case according to the invention; -
FIG. 23 is a cross-sectional view showing an embodiment of a step of manufacturing the housing case according to the invention; -
FIG. 24 is a cross-sectional view showing an embodiment of a step of manufacturing the housing case according to the invention; -
FIG. 25 is a cross-sectional view showing an embodiment of a step manufacturing of the housing case according to the invention; -
FIG. 26 shows an example of the housing case obtained by using the stationary die shown inFIG. 18 ; -
FIG. 27 shows another embodiment of the stationary die of the glass insert molding die according to the invention, the stationary die viewed from the movable die side; -
FIG. 28 shows another embodiment of the stationary die of the glass insert molding die according to the invention, the stationary die viewed from the movable die side; -
FIG. 29 shows an example of the housing case obtained by using the stationary die shown inFIG. 27 ; -
FIG. 30 shows an example of the housing case obtained by using the stationary die shown inFIG. 28 ; -
FIG. 31 shows another embodiment of the stationary die of the glass insert molding die according to the invention, the stationary die viewed from the movable die side; -
FIG. 32 is a cross-sectional view of the stationary die taken along the line XXXII-XXXII shown inFIG. 31 ; -
FIG. 33 shows an example of the housing case obtained by using the stationary die shown inFIG. 31 ; -
FIG. 34 is a cross-sectional view showing another embodiment of the stationary die of the glass insert molding die according to the invention; -
FIG. 35 shows another example of the housing case obtained by using the stationary die shown inFIG. 18 ; -
FIG. 36 shows an embodiment of the glass insert molding die according to the invention in which a transfer film is sandwiched between the stationary die to which the flat plate has adhered and the movable die; -
FIG. 37 shows an example of the closed glass insert molding die shown inFIG. 36 after the transfer film is sandwiched; -
FIG. 38 is a perspective view showing a housing case of related art; and -
FIG. 39 is a cross-sectional view showing how molding shrinkage occurs when a glass plate, instead of a film comprising a hard coat layer, is inserted into a die and the glass plate is integrated with the whole front portion of a housing case. - Embodiments of the invention will be described below in detail with reference to the drawings.
- A
housing case 1 shown inFIG. 1 includes aflat plate 2 having a dimension substantially the same as that of the front portion of the housing case and comprising at least a glass plate, and aresin frame 3 integrated with theflat plate 2 to support the backside periphery of the flat plate. The portion (b) inFIG. 1 is an exploded view of the portion (a). Thehousing case 1 is integrated with a back case (not shown), and the resultant integrated case houses a substrate on which a variety of electronic components are mounted to form a small electric device or communication device. - The
flat plate 2 comprises at least a glass plate, which can provide sufficient hardness (at least 9H) of the front portion of thehousing case 1. The glass plate can be any of a standard plate glass, a reinforced plate glass, a polished plate glass, and other suitable plate glass. The thickness of the glass plate, in consideration of the strength, preferably ranges from 0.3 mm to 2.0 mm, more preferably from 0.5 mm to 2.0 mm, still more preferably from 0.8 mm to 1.5 mm. - To solve the problem described above, the inventor first planned, in the housing case of the related art, to integrate the synthetic resin layer with the
flat plate 2 instead of thehard coat 103 in the front portion of the case. Specifically, the wholeflat plate 2 is in contact with thesynthetic resin layer 101 in the front portion of the case. Thesynthetic resin layer 101 that has been formed in the injection molding die, however, experiences molding shrinkage during cooling solidification, whereas the portion in contact with the wholeflat plate 2 does not experience molding shrinkage, as shown inFIG. 39 . Since only one side thus experiences the molding shrinkage (in the direction indicated by the arrows inFIG. 39 , for example), theresultant housing case 106 is warped in some cases. In this case, theflat plate 2 breaks when it cannot withstand the warping. - Accordingly, in the invention, the
resin frame 3 is employed so that only the periphery of the backside of theflat plate 2 is integrated. For example, inFIG. 1 , theresin frame 3 supports the entire backside periphery of theflat plate 2. Since theresin frame 3 of the invention is not in contact with the wholeflat plate 2, molding shrinkage of theresin frame 3, if any during the cooling solidification, will likely not affect the wholeflat plate 2. The resultant housing case will therefore not be warped. - The
resin frame 3 may be made of a polystyrene resin, a polyolefin resin, an ABS resin, an AS resin, an AN resin, or any other suitable general-purpose resin. Other useable materials may be a polyphenylene oxide/polystyrene resin, a polycarbonate resin, a polyacetal resin, a polyacrylic resin, a polycarbonate/denatured polyphenylene ether resin, a polybutylene terephthalate resin, an ultrahigh-molecular-weight polyethylene resin, and any other general-purpose engineering resin; and a polysulfone resin, a polyphenylene sulfide resin, a polyphenylene oxide resin, a polyallylate resin, a polyether-imide resin, a polyimide resin, a liquid crystal polyester resin, a polyallyl heat-resistant resin, and any other suitable super-engineering resin. In particular, a resin material having a molding shrinkage rate of 0.6% or lower is more preferably used for theresin frame 3 from the viewpoint of warping prevention, and an example of such a resin material is a polyacrylic resin. Theresin frame 3 may or may not be colored. - The
flat plate 2 is integrated with theresin frame 3 in the following manner. First, theflat plate 2 is introduced into a molding die comprising a movable die and a stationary die, and secured in a predetermined position on the cavity surface, for example, through vacuum suction. After the molding die is closed, a molten resin is injected through a gate into the cavity to fill it. Theresin frame 3 is formed and at the same time bonded to theflat plate 2. After theresin frame 3 is cooled, the molding die is opened and the integratedflat plate 2 andresin frame 3 is removed. When a vertical molding die, which opens vertically, is used, theflat plate 2 can be secured without using vacuum suction or other methods. - The integrated
flat plate 2 andresin frame 3 may have a box shape (seeFIGS. 2 to 4 ) or a lid shape (seeFIGS. 5 and 6 : The broken line represents a counterpart back case).FIG. 2 is a cross-sectional view taken along the line shown inFIG. 1 , andFIGS. 3 to 6 show other embodiments of that shown inFIG. 2 . In either case, the box shape or the lid shape, setting the dimension of theflat plate 2 to be slightly smaller than that of the front portion of thehousing case 1 as shown inFIGS. 2 , 5, and 6 provides more degrees of freedom in designing the exterior appearance of thehousing case 1 than a case where the dimension of theflat plate 2 is the same as that of the front portion of thehousing case 1 as shown inFIGS. 3 and 4 . For example, it is possible to design thehousing case 1 in such a way that the corners thereof are rounded (seeFIGS. 2 , 5, and 6). When a box shape is employed, setting the width of the portion where theflat plate 2 is integrated withresin frame 3 to be greater than the thickness of the sidewall of the box as shown inFIGS. 2 and 3 increases the area that supports theflat plate 2 accordingly, whereby thehousing case 1 is more strengthened. - Roughening the backside periphery of the
flat plate 2 allows theflat plate 2 to more intimately adhere to theresin frame 3. - The configuration of the
housing case 1 of the invention is not limited to the aspect described above. For example, theresin frame 3 may support one, two, or three sides of the backside periphery (seeFIGS. 7 to 10 ), or a plurality of divided portions of theresin frame 3 may support the backside periphery of the flat plate 2 (seeFIGS. 11 and 12 ). In these cases, molding shrinkage of theresin frame 3, if any during the cooling solidification, will likely not affect the wholeflat plate 2. Specifically, the housing case will less likely warp than the case where theresin frame 3 supports the entire backside periphery of theflat plate 2. Further, when theresin frame 3 does not support the entire backside periphery of theflat plate 2, input/output terminals and other components are readily provided on a side surface of thehousing case 1. - The
flat plate 2 may have decoration on the backside of the glass plate (not shown). Since the glass plate has a sufficient hardness (at least 9H), it is unlikely scratched, and the decoration on the backside viewed through the glass plate will not be degraded in terms of aesthetics. - The decoration on the backside of the glass plate is preferably formed by printing a decoration layer. Preferred examples of the material of the decoration layer include a polyvinyl chloride resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, and an alkyd resin, any of which is used as a binder along with a coloring ink containing a pigment or a dye having an appropriate color as a coloring agent. A preferred example of the printing method is screen printing. For a solid single color, a variety of coating methods, such as spray coating, can be used.
- The decoration layer may alternatively comprise a metal thin film layer or a combination of a printed layer and a metal thin film layer. The metal thin film layer serves to exhibit metallic luster as the decoration layer and is formed by using vacuum deposition, sputtering, ion plating, plating, or any other suitable method. In this case, aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, zinc, or any other suitable metal, or any of the alloys or compounds thereof is used in accordance with the metallic luster color to be exhibited. To form a partial metal thin film layer, for example, after a solvent-soluble resin layer is formed on the portion where no metal thin film layer is required, a metal thin film is formed over the surface, and the solvent-soluble resin layer and the unnecessary metal thin film thereon are removed by solvent cleaning. The solvent used in this process is water or an aqueous solution in many cases. Alternatively, a metal thin film is formed over the surface, and a resist layer is formed on the portion where the metal thin film needs to be left. Acid or alkali is used to etch away the resist layer.
- When the
housing case 1 is used for a device including a display device, theflat plate 2 may have decoration on the front surface and/or the rear surface of the glass plate except at least a display window for the display device (seeFIG. 13 ). InFIG. 13 , the portion (b) is an exploded view of the portion (a), and reference characters 2A and 2B denote a decorated portion and an undecorated portion, respectively. When the front surface of the glass plate is decorated, the display screen of the display device viewed through the glass plate in the undecorated portion 2B will not be degraded in terms of clarity, because the glass plate has such a sufficient hardness (at least 9H) that it is unlikely to be scratched. When the rear surface of the glass plate is decorated, not only will the display screen not be degraded in terms of clarity as in the case where the front surface of the glass plate is decorated, because the glass plate has such a sufficient hardness (at least 9H) that it is unlikely to be scratched, but also the decoration on the rear surface viewed through the glass plate in the decorated portion 2A will not be degraded in terms of aesthetics. - The
flat plate 2 of thehousing case 1 of the invention may include a layer that allows theflat plate 2 to adhere more intimately to theresin frame 3. For example, an undecorated rear surface of a glass plate 2E may be integrated with theresin frame 3 with an adhesive layer for glass 2F, a primer layer 2G, and an adhesive layer for resin 2H interposed between the rear surface of the glass plate 2E and the resin frame 3 (seeFIG. 14 ).FIG. 14 is an enlarged cross-sectional view of theflat plate 2, and reference character 2D inFIG. 14 denotes a front surface decoration layer. - The adhesive layer for glass 2F may be made of a known adhesive for glass, which can be, for example, an adhesive for glass made of a polyester resin.
- The primer layer 2G may be made of a known primer material, which can be, for example, a primer material made of a polyester resin. When the adhesive layer for glass 2F strongly adheres to the adhesive layer for resin 2H, the primer layer 2G can be omitted.
- The adhesive layer for resin 2H may be made of a known adhesive for resin, which can be, for example, an adhesive for resin made of a vinyl chloride/vinyl acetate/acrylic resin.
- The
flat plate 2 of thehousing case 1 of the invention may alternatively include the layer described below that allows theflat plate 2 to adhere more intimately to theresin frame 3. Specifically, the rear surface of the glass plate 2E is decorated, and the layer containing the decoration also serves as an adhesive layer for glass in the portion where the rear surface of theflat plate 2 is integrated with theresin frame 3. The rear surface of theflat plate 2 can be integrated with theresin frame 3 with the primer layer 2G and the adhesive layer for resin 2H interposed between the rear surface of theflat plate 2 and the resin frame 3 (seeFIG. 15 ).FIG. 15 is an enlarged cross-sectional view of theflat plate 2. Reference character 2I inFIG. 15 denotes the backside decoration layer, which also serves as the adhesive layer for glass in the integrated portion. The decorative layer/adhesive layer for glass can be made of the same material as that of the adhesive layer for glass 2F described above but containing a pigment or a dye having an appropriate color as a coloring agent. In this case, the glass plate is unlikely to be scratched because it has a sufficient hardness (at least 9 H), whereby the decoration on the rear surface viewed through the glass plate will not be degraded in terms of aesthetics. - The adhesive layer for glass 2F, the primer layer 2G, the adhesive layer for resin 2H, and the decorative layer/adhesive layer for glass may be formed, for example, by screen printing.
- The
flat plate 2 of thehousing case 1 of the invention may have an opening 2C (seeFIG. 16 ). Thehousing case 1 shown inFIG. 16 is integrated with a back case (not shown), and the resultant integrated case houses a substrate on which a flash memory or other electronic elements, a liquid crystal panel or other display devices, a piezoelectric speaker for outputting an operating sound, a battery, and an operation panel that fits in the opening 2C are mounted. A digital audio player is thus formed. The portion (b) inFIG. 16 is an exploded view of the portion (a). - When the
flat plate 2 of thehousing case 1 of the invention has the opening 2C, it is further preferable to provide anopening resin frame 4 integrated with theflat plate 2 to support the surrounding portion of the opening 2C, as shown inFIG. 17 . The thus configuredhousing case 1 is further strengthened. The openingresin frame 4 can be implemented in a variety of aspects as in the case of theresin frame 3. The portion (b) inFIG. 17 is an exploded view of the portion (a). - When the
housing case 1 of the invention is configured in such a way that theresin frame 3 covers the side surfaces of theflat plate 2 not to create any step as shown inFIGS. 2 , 5, and 6, there is no risk that theflat plate 2 is peeled off theresin frame 3 when any of the side surfaces of theflat plate 2 is caught by something when the product is in use. - A glass insert molding die and a method for manufacturing the housing case will now be described. First, the
housing case 1 provided in the present embodiment will be described with reference toFIGS. 26 , 29, 30, 33, and 35. Any of thehousing cases 1 shown inFIGS. 26 , 29, 30, 33, and 35 includes theflat plate 2, which takes up almost all the front area of the housing case and comprises at least a glass plate, and theresin frame 3, which supports the backside periphery of theflat plate 2 and is integrated with theflat plate 2 in such a way that theresin frame 3 covers at least the portion of the end surfaces of theflat plate 2 that is connected to the supported portion. InFIGS. 26 , 29, 30, 33, and 35, the portion (a) is a front view; the portion (b) is a rear view; and the portions (c) and (d) are cross-sectional views. Thehousing case 1 is integrated with a back case (not shown), and the resultant integrated case houses a substrate on which a variety of electronic components are mounted. A small electric device or communication device is thus formed. - In the invention, the
resin frame 3, which is integrated with the periphery of the rear surface of theflat plate 2, is insert-molded. For example, inFIGS. 26 , 33, and 35, theresin frame 3 supports all the backside periphery of theflat plate 2, whereas inFIGS. 29 and 30 , theresin frame 3 supports a substantially C-shaped portion obtained by cutting part of the backside periphery of theflat plate 2. Since theresin frame 3 of the invention is not in contact with the wholeflat plate 2, molding shrinkage of theresin frame 3, if any during the cooling solidification, will likely not affect the wholeflat plate 2. The resultant housing case will therefore not suffer from warping. - Further, in the invention, since the
resin frame 3 covers the end surfaces of theflat plate 2, there is no risk of theflat plate 2 peeling off theresin frame 3 when any of the end surfaces of theflat plate 2 is caught by something when the product is in use. - The
flat plate 2 is integrated with theresin frame 3 by using a glass insert molding die, which will be described below. - The glass insert molding die includes a
stationary die 15 and amovable die 10 that sandwich theflat plate 2 primarily comprising a glass plate when the dies are closed and form a cavity that faces not only the periphery of theflat plate 2 facing thestationary die 15 but also the end surfaces of theflat plate 2. Thestationary die 15 includes a slidingcore 5 having a bottom portion that comes into contact with the periphery of theflat plate 2 facing the stationary die 15 (hereinafter referred to as a front-end bottom portion 5 b) and a wall portion that is connected to the front-end bottom portion 5 b and positionally comes into contact with the end surfaces of the flat plate 2 (hereinafter referred to as a front-end wall portion 5 a). The front-end wall portion 5 a and the front-end bottom portion 5 b are provided at the front end of the slidingcore 5. The stationary die 15 further includes suction holes 8 provided in the surface where theflat plate 2 is sandwiched (hereinafter referred to as a flat plate abutting surface 7) (seeFIGS. 18 and 19 ).FIG. 19 is a cross-sectional view taken along the line XIX-XIX shown inFIG. 18 . - The sliding
core 5 is capable of being advanced and retracted using a drive unit (not shown) in the direction in which the dies are closed between a flat plate positioning position I and a cavity forming position II. The flat plate positioning position I is the position where the front-end bottom portion 5 b does not protrude from the surface of thestationary die 15 where theflat plate 2 is sandwiched but the front-end wall portion 5 b comes into contact with the flat plate 2 (seeFIGS. 19 , 21 and 22). The cavity forming position II is the position where the front-end bottom portion 5 b and the front-end wall portion 5 a are separated from the flat plate 2 (seeFIGS. 23 and 24 ). The slidingcore 5 is capable of being advanced to a glass insert mold pushing position III where the front-end bottom portion 5 b protrudes from the flatplate abutting surface 7 of thestationary die 15 as required (seeFIG. 25 ). - In
FIGS. 19 , 21, and 22, the front-end bottom portion 5 b of the slidingcore 5 is seamlessly connected with the flatplate abutting surface 7 of thestationary die 15. Agroove 14 may alternatively be formed between the front-end bottom portion 5 b and the flat plate abutting surface 7 (seeFIG. 34 ). In this case, the area of theresin frame 3 that is integrated with the backside periphery of theflat plate 2 increases by the amount of the resin that fills thegroove 14 in the molding process. The flat plate positioning position I may be set in such a way that the front-end bottom portion 5 b is flush with the flatplate abutting surface 7 of thestationary die 15 as shown inFIGS. 19 , 21, and 22. The flat plate positioning position I may alternatively be set in such a way that the front-end bottom portion 5 b is retracted from the flatplate abutting surface 7 of thestationary die 15, because theflat plate 2 can be positioned as long as the front-end wall portion 5 a comes into contact with the end surfaces of theflat plate 2. - The front-end wall portion 5 a to positionally come into contact with the end surfaces of the
flat plate 2 can be formed into two U-shaped portions facing each other when viewed in the direction perpendicular to adie parting plane 6, for example, as shown inFIG. 18 . The arrangement of the front-end wall portion 5 a is, of course, not limited to the aspect described above, but the arrangement may be determined as appropriate not to misalign theflat plate 2 in accordance with the shape of theflat plate 2. For example, the front-end wall portion 5 a can be disposed at each corner of theflat plate 2 or at part of each side of theflat plate 2. Theflat plate 2 can have an arbitrary shape, such as a rectangle with rounded corners as shown inFIG. 18 , a rectangle with square corners, and an ellipse. Further, the number of slidingcores 5 is not limited to a specific number. Moreover, the slidingcore 5 may be partially provided along the perimeter of theflat plate 2 as shown inFIG. 18 , or the front-end wall portion 5 a may completely surround theflat plate 2. - A method for manufacturing the
housing case 1 using the thus configured glass insert molding die will now be described. - First, after the sliding
core 5 is moved to the flat plate positioning position I, theflat plate 2 is placed on the flatplate abutting surface 7 of the stationary die 15 (seeFIGS. 20 and 21 ).FIG. 21 is a cross-sectional view taken along the line XXI-XXI shown inFIG. 20 . - In this positioned state, the
flat plate 2 is suctioned and secured on the flatplate abutting surface 7 as a result ofair 12 being suctioned through the suction holes 8 provided in the flat plate abutting surface 7 (seeFIG. 22 ). The process by which the flat plate is suctioned and secured is not necessarily limited to the suctioning of air. For example, suction cups may be provided on the surface where theflat plate 2 is sandwiched. - The
movable die 10 is then advanced toward thestationary die 15 to which theflat plate 2 has adhered so as to close the dies, whereby themovable die 10 and the flatplate abutting surface 7 of thestationary die 15 sandwich theflat plate 2, and thestationary die 15, themovable die 10, and theflat plate 2 form acavity 13, which is a die space (seeFIG. 23 ). At this point, the drive unit (not shown) retracts the slidingcore 5 to the position where the front-end bottom portion 5 b is separated by a predetermined distance from the backside periphery of theflat plate 2, and a molten resin can now reach the portion that was in contact with the front-end wall portion 5 a and the front-end bottom portion 5 b of the sliding core 5 (cavity forming position II). The retraction of the slidingcore 5 may be carried out at any of the following points in time immediately before themovable die 10 starts being advanced, during the forward movement, and immediately after the advancing movement is completed. - After the sliding
core 5 is moved to the cavity forming position II and thecavity 13 is filled with the molten resin injected through a gate 11, theresin frame 3 is integrated with theflat plate 2 in such a way that theresin frame 3 supports the backside periphery of theflat plate 2 and covers the portion of the end surfaces of theflat plate 2 that is connected to the supported portion. Thehousing case 1, which is the glass insert mold, is thus obtained (seeFIG. 24 ). - The molten resin may be a polystyrene resin, a polyolefin resin, an ABS resin, an AS resin, an AN resin, or any other suitable general-purpose resin. Other useable materials may be a polyphenylene oxide/polystyrene resin, a polycarbonate resin, a polyacetal resin, a polyacrylic resin, a polycarbonate/denatured polyphenylene ether resin, a polybutylene terephthalate resin, an ultrahigh-molecular-weight polyethylene resin, and any other general-purpose engineering resin; and a polysulfone resin, a polyphenylene sulfide resin, a polyphenylene oxide resin, a polyallylate resin, a polyether-imide resin, a polyimide resin, a liquid crystal polyester resin, a polyallyl heat-resistant resin, and any other suitable super-engineering resin. In particular, a resin material having a molding shrinkage rate of 0.6% or lower is more preferably used for the
resin frame 3 in terms of preventing warping, and an example of such a resin material is a polyacrylic resin. Theresin frame 3 may or may not be colored. - After the
movable die 10 is refracted to be separated from thestationary die 15, specifically, the dies are opened, the drive unit forwards the slidingcore 5 to the glass insert mold pushing position III (seeFIG. 25 ). In this process, the slidingcore 5 serves as an ejector pin, and thehousing case 1 is smoothly separated from thestationary die 15. Thehousing case 1 can thus be readily removed from the die device. When a dedicated ejector pin is separately prepared, the slidingcore 5 is not necessarily used to push the glass insert mold. - As described above, in the method for manufacturing the housing case using the glass insert molding die according to the present embodiment, since the sliding
core 5 not only forms the cavity for molding theresin frame 3 for supporting the backside periphery but also serves as the mechanism for positioning theflat plate 2 as well as the mechanism for pushing the glass insert mold as required, thehousing case 1 can be manufactured at a low cost. - The integrated
flat plate 2 andresin frame 3 may have a lid shape (seeFIGS. 26 , 29, and 30) or a box shape (seeFIGS. 33 and 35 ).FIGS. 26( c) and 26(d) are cross-sectional views taken along the lines XXVIc-XXVIc and XXVId-XXVId inFIG. 26( b), respectively.FIGS. 29( c) and 29(d) are cross-sectional views taken along the lines XXIXc-XXIXc and XXIXd-XXIXd inFIG. 29( b), respectively.FIGS. 30( c) and 30(d) are cross-sectional views taken along the lines XXXc-XXXc and XXXd-XXXd inFIG. 30( b), respectively. Even when the box shape is employed, it is conceivable that a box sidewall cavity is formed outside the slidingcore 5 as shown inFIG. 33 , or a sidewall cavity is formed by refracting the slidingcore 5 as shown inFIG. 35 . The same notation as that used in the above cases applies toFIGS. 33 and 35 .FIGS. 33( c) and 33(d) are cross-sectional views taken along the lines XXXIIIc-XXXIIIc and XXXIIId-XXXIIId inFIG. 33( b), respectively.FIGS. 35( c) and 35(d) are cross-sectional views taken along the lines XXXVc-XXXVc and XXXVd-XXXVd inFIG. 35( b), respectively. - Among the backside periphery and end surfaces of the
flat plate 2, the portions that do not correspond to the slidingcore 5 are not necessarily integrated with theresin frame 3 as shown inFIGS. 26 , 33, and 35. For example, only the end surface that does not correspond to the slidingcore 5 may be integrated with theresin frame 3 as shown inFIG. 29 , or the backside periphery or end surface that does not correspond to the slidingcore 5 may not integrated with theresin frame 3 as shown inFIG. 30 . To obtain thehousing case 1 shown inFIG. 29 , the flatplate abutting surface 7 inFIG. 18 is extended to the lower inner wall of acavity forming portion 9 as shown inFIG. 27 so that the corresponding portion of the backside periphery of theglass plate 2 is not filled with the molten resin. To obtain thehousing case 1 shown inFIG. 30 , the flatplate abutting surface 7 inFIG. 18 is not changed but the lower inner wall of thecavity forming portion 9 is shifted to the lower end of the flatplate abutting surface 7 as shown inFIG. 28 so that the corresponding portions of the backside periphery and the end surface of theglass plate 2 are not filled with the molten resin. - The
flat plate 2 may be a decorated glass plate as shown inFIGS. 26 , 29, 30, 33, and 35, or may be an undecorated, skeleton glass plate. InFIGS. 26 , 29, 30, 33, and 35, reference character 2A denotes the decorated portion, and reference character 2B denotes the undecorated portion, which becomes a transparent window. - The decoration on the rear surface of the glass plate is formed by printing a decoration layer. Examples of the material of the decoration layer may include a polyvinyl chloride resin, a polyamide resin, a polyester resin, a polyacrylic resin, a polyurethane resin, a polyvinyl acetal resin, a polyester urethane resin, a cellulose ester resin, and an alkyd resin, any of which is used as a binder along with a coloring ink containing a pigment or a dye having an appropriate color as a coloring agent. An example of the printing method may be screen printing. For a solid single color, a variety of coating methods, such as spray coating, can be used.
- The decoration layer may alternatively comprise a metal thin film layer or a combination of a printed layer and a metal thin film layer. The metal thin film layer serves to exhibit metallic luster as the decoration layer and is formed by using vacuum deposition, sputtering, ion plating, plating, or any other suitable method. In this case, aluminum, nickel, gold, platinum, chromium, iron, copper, tin, indium, silver, titanium, lead, zinc, or any other suitable metal, or any of the alloys or compounds thereof is used in accordance with the metallic luster color to be exhibited. To form a partial metal thin film layer, for example, after a solvent-soluble resin layer is formed on the portion where no metal thin film layer is required, a metal thin film is formed over the surface, and the solvent-soluble resin layer and the unnecessary metal thin film thereon are removed by solvent cleaning. The solvent used in this process is water or an aqueous solution in many cases. Alternatively, a metal thin film is formed over the surface, and a resist layer is formed on the portion where the metal thin film needs to be left. Acid or alkali is used to etch away the resist layer.
- Roughening the surface of the
flat plate 2 that is integrated with theresin frame 3 allows theflat plate 2 to more intimately adhere to theresin frame 3. - The glass insert molding die of the invention may include simultaneous molding/painting means 16 for allowing a
transfer film 17 to be sandwiched between thestationary die 15 to which theflat plate 2 has adhered and the movable die 10 (seeFIG. 36 ). After thetransfer film 17 is sandwiched between thestationary die 15 to which theflat plate 2 has adhered and themovable die 10, and the dies are closed (seeFIG. 37 ), the painting portion of thetransfer film 17 can be transferred to theresin frame 3 integrated with theflat plate 2 simultaneously with the injection of the molten resin. Specifically, the glass insert molding die of the invention also serves as a simultaneous molding/transferring die. - The
transfer film 17 includes a transfer layer on an elongated base sheet. The transfer layer has a peelable layer, a pattern layer, an adhesive layer, and other layers sequentially stacked. The peelable layer allows the transfer layer to be peeled off the base sheet. The pattern layer provides the surface of an injection-molded piece with decorative appearance and functionality. Examples of the pattern layer include a typical printed pattern and a conductive pattern made of a conductive material. The adhesive layer bonds the transfer layer to theresin frame 3, which is the molded piece. - The
transfer film 17 may be adapted in such a way that a film feeding device shown inFIG. 36 feeds the painting portion of thetransfer film 17 between the dies by a predetermined length at a time. Alternatively, a plurality of transfer film sheets may be fed sheet by sheet. - Any of the variety of embodiments can be combined as appropriate to provide the respective advantageous effects. While the invention has been adequately described with reference to the accompanying drawings in relation to preferred embodiments, a variety of variations and modifications shall be apparent to those skilled in the art. Such variations and modifications should be taken as encompassed within the scope of the invention to the extent that they do not depart from the scope of the invention set forth by the claims.
- Examples, of the values in the above embodiments will be described below, but the scope of the invention is not limited thereto.
- A glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate. A decorative layer was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder. An adhesive layer for glass made of a polyester resin, a primer layer made of a polyester resin, and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the undecorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- The flat plate was introduced into a molding die comprising a movable die and a stationary die, and secured in a predetermined position on the cavity surface through vacuum suction. After the molding die was closed, a molten polyacrylic resin was injected through the gate to fill the cavity. A rectangular resin frame was formed, and at the same time the resin frame was bonded to the undecorated surface of the flat plate with the adhesive layer for resin, the primer layer, and the adhesive layer for glass interposed between the resin frame and the undecorated surface of the flat plate. After the resin frame was cooled, the molding die was opened to remove the resin frame integrated with the entire backside periphery of the flat plate. A digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius R of 1 mm was thus obtained.
- A glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate. A decorative layer/adhesive layer for glass was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder. A primer layer made of a polyester resin and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the decorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- The flat plate was introduced into the molding die comprising the movable die and the stationary die, and secured in a predetermined position on the cavity surface through vacuum suction. After the molding die was closed, a molten polyacrylic resin was injected through the gate to fill the cavity. A rectangular resin frame was formed, and at the same time the resin frame was bonded to the decorated surface of the flat plate with the adhesive layer for resin and the primer layer interposed between the resin frame and the decorated surface of the flat plate. After the resin frame was cooled, the molding die was opened to remove the resin frame integrated with the entire backside periphery of the flat plate. A digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius of 1 mm was thus obtained.
- Example 3 only differs from Example 1 in that the adhesive layer for glass, the primer layer, and the adhesive layer for resin were sequentially formed on not only the periphery of the glass plate but also the entire surrounding portion of the opening in the undecorated surface of the flat plate to form a flat plate; a rectangular resin frame and a circular opening resin frame were formed by using injection molding; and at the same time, the resin frame and the opening resin frame were bonded to the undecorated surface of the flat plate with the adhesive layer for resin, the primer layer, the adhesive layer for glass interposed between the resin frames and the undecorated surface of the flat plate.
- Example 4 only differs from Example 2 in that the primer layer and the adhesive layer for resin were sequentially formed on not only the periphery of the glass plate but also the entire surrounding portion of the opening in the decorated surface of the flat plate to form a flat plate; a rectangular resin frame and a circular opening resin frame were formed by using injection molding; and at the same time, the resin frame and the opening resin frame were bonded to the decorated surface of the flat plate with the adhesive layer for resin and the primer layer interposed between the resin frames and the decorated surface of the flat plate.
- Example 5 only differs from Example 3 in that the resin frame is divided into two.
- Example 6 only differs from Example 4 in that each of the resin frame and the opening resin frame is divided into two.
- A glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate. A decoration layer was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder. An adhesive layer for glass made of a polyester resin, a primer layer made of a polyester resin, and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the undecorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- In this case, the glass insert molding die of the invention described above was used. After the sliding core was moved to the flat plate positioning position, the flat plate was placed on the surface of the stationary die where the flat plate was sandwiched, and the positioned flat plate was suctioned by suctioning air through the suction holes and secured on the surface where the flat plate to be sandwiched. After the stationary die to which the flat plate had adhered and the movable die were closed, and the sliding core was moved to the cavity forming position, a molten resin was injected into the cavity to integrate the flat plate with a resin frame. After the die was opened, the sliding core was moved to the glass insert mold pushing position and the glass insert mold was removed. A digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius of 1 mm was thus obtained.
- A glass plate of 88 mm in length, 38 mm in width, and 1 mm in thickness was prepared, and a circular opening for an operation panel was provided in the glass plate. A decorative layer/adhesive layer for glass was then formed on one side of the glass plate except a display window for a liquid crystal screen by using screen printing along with an ink containing a coloring agent and a polyester resin as a binder. A primer layer made of a polyester resin and an adhesive layer for resin made of a vinyl chloride/vinyl acetate/acrylic resin were then sequentially formed on the entire periphery of the decorated side of the glass plate by using screen printing. A flat plate was thus obtained.
- The glass insert molding was performed in the same manner as Example 7, and a digital audio player housing case of 90 mm in length, 40 mm in width, and 4 mm in height with the corners rounded at a radius of 1 mm was obtained.
- For all the housing cases of Examples 1 to 8, the front portion of the case, in particular, the portion that covers the display screen, such as an LCD, was adequately hardened.
- The invention is preferably applicable to a housing case, for example, for a small electric device and communication device, a method for manufacturing the housing case, and a glass insert molding die used in the same.
Claims (13)
1. A housing case for a small electric device and communication device, the housing case comprising:
a flat plate having a dimension substantially the same as that of a front portion of the housing case and comprising at least a glass plate; and
a resin frame integrated with the flat plate to support a backside periphery of the flat plate.
2. The housing case according to claim 1 ,
wherein the flat plate has decoration on a rear surface of the glass plate.
3. The housing case according to claim 1 ,
wherein the device includes a display device; and
the flat plate has decoration on the front surface and/or the rear surface of the glass plate except at least a display window for the display device.
4. The housing case according to claim 1 ,
wherein the rear surface of the glass plate is not decorated; and
the rear surface of the glass plate is integrated with the resin frame, with an adhesive layer for glass, a primer layer, and an adhesive layer for resin interposed between the rear surface of the glass plate and the resin frame.
5. The housing case according to claim 3 ,
wherein the rear surface of the glass plate is decorated,
the layer having the decoration also serves as an adhesive layer for glass in the portion where the rear surface of the flat plate is integrated with the resin frame; and
the rear surface of the flat plate is integrated with the resin frame with a primer layer and an adhesive layer for resin interposed between the rear surface of the flat plate and the resin frame.
6. The housing case according to claim 1 ,
wherein the flat plate has an opening.
7. The housing case according to claim 6 ,
further comprising an opening resin frame integrated with the flat plate to support the surrounding portion of the opening.
8. The housing case according to claim 1 ,
wherein the resin frame covers a side surface of the flat plate.
9. The housing case according to claim 1 ,
wherein the integrated flat plate and resin frame has a box shape.
10. The housing case according to claim 1 ,
wherein the resin frame supports the entire backside periphery of the flat plate.
11. The housing case according to claim 1 ,
wherein the resin frame supports one, two, or three sides of the backside periphery of the flat plate.
12. The housing case according to claim 1 ,
wherein a plurality of divided portions of the resin frame support the backside periphery of the flat plate.
13. The housing case according to claim 1 ,
wherein the resin frame is made of a resin material having a molding shrinkage rate of 0.6% or lower.
Priority Applications (1)
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US13/294,509 US20120055826A1 (en) | 2006-09-22 | 2011-11-11 | Housing Case, Method for Manufacturing Housing Case, and Glass Insert Molding Die Used in Same |
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JP2006-294799 | 2006-10-30 | ||
US12/441,635 US8119048B2 (en) | 2006-09-22 | 2007-09-20 | Housing case, method for manufacturing housing case, and glass insert molding die used in same |
US13/294,509 US20120055826A1 (en) | 2006-09-22 | 2011-11-11 | Housing Case, Method for Manufacturing Housing Case, and Glass Insert Molding Die Used in Same |
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US13/294,509 Abandoned US20120055826A1 (en) | 2006-09-22 | 2011-11-11 | Housing Case, Method for Manufacturing Housing Case, and Glass Insert Molding Die Used in Same |
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Also Published As
Publication number | Publication date |
---|---|
EP2066162A4 (en) | 2011-01-19 |
US20100014232A1 (en) | 2010-01-21 |
US8119048B2 (en) | 2012-02-21 |
EP2066162B1 (en) | 2012-02-22 |
EP2066162A1 (en) | 2009-06-03 |
KR101398278B1 (en) | 2014-05-22 |
BRPI0718514A2 (en) | 2013-11-12 |
TWI415545B (en) | 2013-11-11 |
TW200824534A (en) | 2008-06-01 |
JP5068393B2 (en) | 2012-11-07 |
WO2008035736A1 (en) | 2008-03-27 |
JP2012166567A (en) | 2012-09-06 |
CN101518168A (en) | 2009-08-26 |
KR20090057376A (en) | 2009-06-05 |
CN101518168B (en) | 2011-12-07 |
JPWO2008035736A1 (en) | 2010-01-28 |
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