EP0332863A2 - Mounting of a print head - Google Patents

Mounting of a print head Download PDF

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Publication number
EP0332863A2
EP0332863A2 EP19890102605 EP89102605A EP0332863A2 EP 0332863 A2 EP0332863 A2 EP 0332863A2 EP 19890102605 EP19890102605 EP 19890102605 EP 89102605 A EP89102605 A EP 89102605A EP 0332863 A2 EP0332863 A2 EP 0332863A2
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EP
European Patent Office
Prior art keywords
clamping
bearing
leg
printhead
carrier part
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.)
Granted
Application number
EP19890102605
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German (de)
French (fr)
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EP0332863A3 (en
EP0332863B1 (en
Inventor
Wolfgang Blindow
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Wincor Nixdorf International GmbH
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Wincor Nixdorf International GmbH
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Publication date
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Priority to AT89102605T priority Critical patent/ATE76000T1/en
Publication of EP0332863A2 publication Critical patent/EP0332863A2/en
Publication of EP0332863A3 publication Critical patent/EP0332863A3/en
Application granted granted Critical
Publication of EP0332863B1 publication Critical patent/EP0332863B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J25/00Actions or mechanisms not otherwise provided for
    • B41J25/34Bodily-changeable print heads or carriages

Definitions

  • the invention relates to a device for holding a printhead on a printhead carriage of a printer, comprising a support part which can be fastened to the printhead carriage and has a contact surface for the printhead receptacle and clamping means for pressing the printhead onto the contact surfaces.
  • the invention has for its object to provide a device of the aforementioned type, which is simple in construction and inexpensive to manufacture and allows convenient and quick replacement of the printhead, while still ensuring a secure and precise fit of the printhead on the support member.
  • clamping means comprise two clamping levers which are pivotally mounted on both sides of the printhead receptacle on the carrier part between a release position and a locking position and each have a clamping leg intended for engaging behind a clamping surface on the printhead, and that on the carrier part and the Clamping levers locking means are formed which engage with each other in the locking position of the clamping levers.
  • the correct seating of the printhead on the carrier part is determined by the printhead receptacle and the contact surfaces.
  • the latching means on the carrier part and the tensioning levers enable simple release and locking of the tensioning levers without the aid of tools.
  • the carrier part and the tensioning lever can be made of plastic, the choice of a suitable plastic on the one hand ensuring the necessary strength and on the other hand the required elasticity of the tensioning lever.
  • the clamping levers are each pivotably mounted in a bearing fork of the carrier part with a bearing leg forming an angle with the clamping leg, the bearing legs being able to carry a bearing bolt which can be clipped into a U-shaped bearing slot of the bearing fork.
  • This embodiment enables simple mounting of the tensioning levers on the carrier part, with no further parts being required.
  • the latching means are formed on the carrier part by lugs provided with ramp surfaces, which protrude into the pivoting path of the clamping levers, so that the clamping levers slide over the ramp surfaces when pivoted into their locking position and engage behind the lugs.
  • the lugs are each arranged on an arm connected to the carrier part, their distance from the bearing axis of the respective tensioning lever being greater than the distance of the tensioning leg from the bearing axis, and wherein the tensioning lever has a handle leg that continues the bearing leg beyond the tensioning leg engages behind the lugs in the locking position of the respective clamping lever.
  • the clamping lever is long enough to to enable convenient locking at relatively high clamping forces.
  • the sufficient length of the tensioning levers simultaneously ensures that they are sufficiently elastic to be able to bend them out of engagement with the lugs on the carrier part.
  • the clamping leg is directed relative to the bearing leg and the handle leg of the respective clamping lever in such a way that it bears against the clamping surface of the printhead under pretension in the locking position of the clamping lever.
  • At least one adjusting element on the carrier part which is intended to engage with a complementary counter element on the printhead.
  • FIG. 1 shows in its upper part a printhead, generally designated 10, with a housing 12 enclosing the actuating magnets for the printing needles and a mouthpiece 14 guiding the printing needles, the view of FIG. 1 looking at the needle exit end of the mouthpiece 14.
  • an anchoring plate 16 is rigidly connected.
  • a mounting device which can be attached to the printer carriage of a printer and which is intended for exchangeable mounting of the print head 10.
  • the holding device comprises an elongated carrier part 20 with a centrally arranged rectangular recess 22 which extends transversely to the longitudinal direction of the carrier part 20 and is intended for receiving the mouthpiece 14 of the printhead 10.
  • two adjusting pins 26 are formed on a contact surface 24 of the carrier part 20 intended for contacting the locking plate 16, which engage in complementary openings 28 in the locking plate 16, so as to ensure a precise fit of the printhead 10 on the carrier part 20.
  • the carrier part 20 each has a storage fork 30 for mounting tensioning levers 32.
  • the bearing fork 30 comprises two legs 33, 34 which delimit a bearing gap 36 into which a bearing leg 38 of the tensioning lever 32 engages.
  • the bearing leg 38 carries a bearing journal 40 which can be inserted into U-shaped bearing slots 42 in the fork legs 32, 34.
  • the straight part of the bearing slots 42 is somewhat narrower than the diameter of the bearing pins, while the bearing surface at the bottom of the bearing slots 42 corresponds exactly to the diameter of the bearing pins 40 so that they can be clipped into the U-shaped slots 42. No further means are therefore required to hold the tensioning levers 32 on the carrier part 20.
  • the bearing leg 38 of the respective clamping lever 32 is extended by a handle leg 44.
  • a handle leg 44 In a central area between the bearing axis and the free end of the handle leg 44, an approximately perpendicular to the longitudinal direction of the bearing leg 38 and the handle leg 44 extends clamping leg 46, the angle ⁇ of the clamping leg 46 with the bearing leg 38 being slightly less than 90 °.
  • arms 48 Arranged in each case on arms 48 which are directed parallel to the direction of insertion of the print head 10 into the carrier part 20 and which has a ramp-shaped instruction surface 52 which can be seen in FIG.
  • FIG. 3 shows the printhead 10 inserted into the holding device 18 with the tension levers 32 still open.
  • the clamping lever 32 are pivoted in the direction of arrows C in Figure 3.
  • the clamping legs 46 come to rest on the upper side of the locking plate 16.
  • the grip legs 44 slide over the inclined instruction surfaces 52 of the lugs 50, the clamping levers 32 being deflected in the direction of the arrow D in FIG. 5 until they snap behind the lugs 50.
  • the clamping leg was braced against the pivoting direction of the arrow C, so that a corresponding holding force acts on the locking plate 16 in order to clamp the print head 10 firmly against the contact surface 24.
  • the entire mounting device consists of three one-piece parts, the two clamping levers being identical. These parts can be manufactured in a simple and inexpensive manner, for example from plastic, and can be easily assembled. Locking and unlocking is extraordinary simple, so that a printhead change can be carried out very quickly and easily.

Abstract

In a device for mounting a print head (10) on the print head carriage of a printer, comprising a support element (20) attached to the print head carriage, the former having a print head seating (22, 24) with bearing surfaces for the print head and clamps (32) for pressing the print head (10) on to the bearing surfaces, the clamps comprise two clamping levers (32) which are mounted on both sides of the print head seating (22, 24) on the support element (20) so as to be able to swivel between a release position and a locked position and each of which features a tensioning member (46) designed to engage behind a clamping surface (16) on the print head (10), where detents (50, 44) are provided on the support element (20) and the clamping levers (32), which engage with one another in the locked position of the clamping levers (32). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Halterung eines Druckkopfes an einem Druckkopfschlitten eines Druckers, umfassend ein an dem Druckkopfschlitten befestigbares Trä­gerteil mit einer Anlageflächen für den Druckkopf aufweisen­den Druckkopfaufnahme und Spannmittel zum Andrücken des Druckkopfes an die Anlageflächen.The invention relates to a device for holding a printhead on a printhead carriage of a printer, comprising a support part which can be fastened to the printhead carriage and has a contact surface for the printhead receptacle and clamping means for pressing the printhead onto the contact surfaces.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der vorstehend genannten Art anzugeben, die einfach im Auf­bau und preiswert in der Herstellung ist sowie ein bequemes und schnelles Auswechseln des Druckkopfes erlaubt, wobei dennoch ein sicherer und präziser Sitz des Druckkopfes an dem Trägerteil gewährleistet ist.The invention has for its object to provide a device of the aforementioned type, which is simple in construction and inexpensive to manufacture and allows convenient and quick replacement of the printhead, while still ensuring a secure and precise fit of the printhead on the support member.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Spannmittel zwei Spannhebel umfassen, die beiderseits der Druckkopfaufnahme an dem Trägerteil zwischen einer Freigabe­stellung und einer Verriegelungsstellung schwenkbar gelagert sind und jeweils einen zum Hintergreifen einer Spannfläche am Druckkopf bestimmten Spannschenkel aufweisen, und daß an dem Trägerteil und den Spannhebeln Rastmittel ausgebildet sind, die in der Verriegelungsstellung der Spannhebel mitein­ander in Eingriff treten.This object is achieved in that the clamping means comprise two clamping levers which are pivotally mounted on both sides of the printhead receptacle on the carrier part between a release position and a locking position and each have a clamping leg intended for engaging behind a clamping surface on the printhead, and that on the carrier part and the Clamping levers locking means are formed which engage with each other in the locking position of the clamping levers.

Der korrekte Sitz des Druckkopfes an dem Trägerteil wird durch die Druckkopfaufnahme und die Anlageflächen bestimmt.The correct seating of the printhead on the carrier part is determined by the printhead receptacle and the contact surfaces.

Die Rastmittel an dem Trägerteil und den Spannhebeln er­möglichen ein einfaches Lösen und Verriegeln der Spann­hebel ohne Hilfe von Werkzeugen. Das Trägerteil und die Spannhebel können aus Kunststoff hergestellt werden, wobei die Wahl eines geeigneten Kunststoffes einerseits die nötige Festigkeit und andererseits die erforderliche Elasti­zität der Spannhebel gewährleistet.The latching means on the carrier part and the tensioning levers enable simple release and locking of the tensioning levers without the aid of tools. The carrier part and the tensioning lever can be made of plastic, the choice of a suitable plastic on the one hand ensuring the necessary strength and on the other hand the required elasticity of the tensioning lever.

Vorzugsweise sind die Spannhebel jeweils mit einem einen Winkel mit dem Spannschenkel bildenden Lagerschenkel in einer Lagergabel des Trägerteils schwenkbar gelagert, wobei die Lagerschenkel einen Lagerbolzen tragen können, der in einen U-förmigen Lagerschlitz der Lagergabel einklipsbar ist. Diese Ausführungsform ermöglicht eine einfache Montage der Spannhebel an dem Trägerteil, wobei keine weiteren Teile benötigt werden.Preferably, the clamping levers are each pivotably mounted in a bearing fork of the carrier part with a bearing leg forming an angle with the clamping leg, the bearing legs being able to carry a bearing bolt which can be clipped into a U-shaped bearing slot of the bearing fork. This embodiment enables simple mounting of the tensioning levers on the carrier part, with no further parts being required.

Bei einer besonders einfachen Ausführungsform der Erfindung sind die Rastmittel an dem Trägerteil von mit Rampenflächen versehenen Nasen gebildet, die in den Schwenkweg der Spann­hebel ragen, so daß die Spannhebel beim Verschwenken in ihre Verriegelungsstellung über die Rampenflächen gleiten und hinter den Nasen einrasten. Vorzugsweise sind dabei die Nasen jeweils an einem mit dem Trägerteil verbundenen Arm angeordnet, wobei ihr Abstand von der Lagerachse des jeweiligen Spannhebels größer als der Abstand der Spann­schenkel von der Lagerachse ist und wobei der Spannhebel einen den Lagerschenkel über den Spannschenkel hinaus fort­setzenden Griffschenkel aufweist, der in der Verriegelungs­stellung des jeweiligen Spannhebels die Nasen hintergreift. Bei dieser Anordnung werden keine eigenen Rastmittel an dem Spannhebel benötigt, der Spannhebel ist lang genug, um auch bei relativ hohen Spannkräften ein bequemes Verriegeln zu ermöglichen. Die ausreichende Länge der Spannhebel gewähr­leistet gleichzeitig eine ausreichende Elastizität der­selben, um sie aus dem Eingriff mit den Nasen an dem Trä­gerteil biegen zu können.In a particularly simple embodiment of the invention, the latching means are formed on the carrier part by lugs provided with ramp surfaces, which protrude into the pivoting path of the clamping levers, so that the clamping levers slide over the ramp surfaces when pivoted into their locking position and engage behind the lugs. Preferably, the lugs are each arranged on an arm connected to the carrier part, their distance from the bearing axis of the respective tensioning lever being greater than the distance of the tensioning leg from the bearing axis, and wherein the tensioning lever has a handle leg that continues the bearing leg beyond the tensioning leg engages behind the lugs in the locking position of the respective clamping lever. With this arrangement, no own locking means are required on the clamping lever, the clamping lever is long enough to to enable convenient locking at relatively high clamping forces. The sufficient length of the tensioning levers simultaneously ensures that they are sufficiently elastic to be able to bend them out of engagement with the lugs on the carrier part.

Um eine ausreichende Spannkraft aufbringen zu können, ist es zweckmäßig, wenn der Spannschenkel relativ zu dem Lagerschenkel und dem Griffschenkel des jeweiligen Spann­hebel so gerichtet ist, daß er in der Verriegelungsstellung des Spannhebels unter Vorspannung an der Spannfläche des Druckkopfes anliegt.In order to be able to apply a sufficient clamping force, it is expedient if the clamping leg is directed relative to the bearing leg and the handle leg of the respective clamping lever in such a way that it bears against the clamping surface of the printhead under pretension in the locking position of the clamping lever.

Um eine präzise Ausrichtung des Druckkopfes an dem Träger­teil zu erleichtern, kann es zweckmäßig sein, an dem Trä­gerteil mindestens ein Justierelement vorzusehen, das zum Eingriff mit einem komplementären Gegenelement am Druck­kopf bestimmt ist.In order to facilitate precise alignment of the printhead on the carrier part, it can be expedient to provide at least one adjusting element on the carrier part which is intended to engage with a complementary counter element on the printhead.

Weitere Merkmale der Erfindung ergeben sich aus den wei­teren Unteransprüchen und der folgenden Beschreibung, welche in Verbindung mit den beigefügten Zeichnungen die Erfindung anhand eines Ausführungsbeispieles beschreibt. Es zeigen:

  • Fig. 1 eine schematische Darstellung eines Druck­kopfes und der zu seiner Halterung an einem Druckerschlitten bestimmten Halte­rungsvorrichtung,
  • Fig. 2 eine Draufsicht auf das Trägerteil der in der Figur 1 dargestellten Halterungs­vorrichtung in Richtung des Pfeiles A,
  • Fig. 3 eine schematische Darstellung der Halte­rungsvorrichung mit eingesetztem Druckkopf und geöffneten Spannhebeln,
  • Fig. 4 eine Darstellung gemäß Figur 3 mit ge­schlossenen Spannhebeln und
  • Fig. 5 eine schematische Draufsicht auf die in der Figur 4 dargestellte Anordnung in Richtung des Pfeiles B.
Further features of the invention result from the further subclaims and the following description, which describes the invention in conjunction with the accompanying drawings using an exemplary embodiment. Show it:
  • 1 is a schematic representation of a print head and the mounting device intended for mounting it on a printer carriage,
  • 2 shows a plan view of the carrier part of the holding device shown in FIG. 1 in the direction of arrow A,
  • 3 shows a schematic representation of the mounting device with the printhead inserted and the tension levers open,
  • Fig. 4 is an illustration according to Figure 3 with closed clamping levers and
  • 5 shows a schematic top view of the arrangement shown in FIG. 4 in the direction of arrow B.

Figur 1 zeigt in ihrem oberen Teil einen allgemein mit 10 bezeichneten Druckkopf mit einem die Betätigungsmagnete für die Drucknadeln einschließenden Gehäuse 12 und einem die Drucknadeln führenden Mundstück 14, wobei man in der Dar­stellung der Figur 1 auf das Nadelaustrittsende des Mund­stücks 14 blickt. Mit dem Mundstück 14 und dem Gehäuse 12 ist eine Verankerungsplatte 16 starr verbunden.FIG. 1 shows in its upper part a printhead, generally designated 10, with a housing 12 enclosing the actuating magnets for the printing needles and a mouthpiece 14 guiding the printing needles, the view of FIG. 1 looking at the needle exit end of the mouthpiece 14. With the mouthpiece 14 and the housing 12, an anchoring plate 16 is rigidly connected.

Im unteren Abschnitt der Figur 1 ist eine allgemein mit 18 bezeichnete Halterungsvorrichtung dargestellt, die an dem Druckerschlitten eines Druckers befestigt werden kann und die zur auswechselbaren Halterung des Druckkopfes 10 be­stimmt ist. Die Halterungsvorrichtung umfaßt ein längliches Trägerteil 20 mit einer mittig angeordneten sich quer zur Längsrichtung des Trägerteils 20 erstreckenden rechteckigen Aussparung 22, die zur Aufnahme des Mundstücks 14 des Druckkopfes 10 bestimmt ist. Beiderseits dieser Aussparung 22 sind an einer zur Anlage der Verriegelungsplatte 16 bestimmten Anlagefläche 24 des Trägerteils 20 zwei Justier­zapfen 26 ausgebildet, die in komplementäre Durchbrechungen 28 in der Verriegelungsplatte 16 eingreifen, um so einen präzisen Sitz des Druckkopfes 10 an dem Trägerteil 20 zu gewährleisten.In the lower section of FIG. 1, a mounting device, generally designated 18, is shown, which can be attached to the printer carriage of a printer and which is intended for exchangeable mounting of the print head 10. The holding device comprises an elongated carrier part 20 with a centrally arranged rectangular recess 22 which extends transversely to the longitudinal direction of the carrier part 20 and is intended for receiving the mouthpiece 14 of the printhead 10. On both sides of this recess 22, two adjusting pins 26 are formed on a contact surface 24 of the carrier part 20 intended for contacting the locking plate 16, which engage in complementary openings 28 in the locking plate 16, so as to ensure a precise fit of the printhead 10 on the carrier part 20.

An seinen beiden Längsenden weist das Trägerteil 20 jeweils eine Lagergabel 30 zur Lagerung von Spannhebeln 32 auf. Die Lagergabel 30 umfaßt zwei Schenkel 33, 34, die einen Lagerspalt 36 begrenzen, in den ein Lagerschenkel 38 des Spannhebels 32 eingreift. Der Lagerschenkel 38 trägt einen Lagerzapfen 40, der in U-förmige Lagerschlitze 42 in den Gabelschenkeln 32, 34 einführbar ist. Dabei ist der gerade Teil der Lagerschlitze 42 etwas schmaler als der Durch­messer der Lagerzapfen, während die Lagerfläche am Grunde der Lagerschlitze 42 dem Durchmesser der Lagerzapfen 40 exakt entspricht, so daß diese in die U-förmigen Schlitze 42 eingeklipst werden können. Es werden daher keine weiteren Mittel benötigt, um die Spannhebel 32 an dem Trägerteil 20 festzuhalten.At its two longitudinal ends, the carrier part 20 each has a storage fork 30 for mounting tensioning levers 32. The bearing fork 30 comprises two legs 33, 34 which delimit a bearing gap 36 into which a bearing leg 38 of the tensioning lever 32 engages. The bearing leg 38 carries a bearing journal 40 which can be inserted into U-shaped bearing slots 42 in the fork legs 32, 34. The straight part of the bearing slots 42 is somewhat narrower than the diameter of the bearing pins, while the bearing surface at the bottom of the bearing slots 42 corresponds exactly to the diameter of the bearing pins 40 so that they can be clipped into the U-shaped slots 42. No further means are therefore required to hold the tensioning levers 32 on the carrier part 20.

Der Lagerschenkel 38 des jeweiligen Spannhebels 32 ist durch einen Griffschenkel 44 verlängert. In einem mittleren Bereich zwischen der Lagerachse und dem freien Ende des Griffschenkels 44 setzt ein annähernd senkrecht zur Längs­richtung von Lagerschenkel 38 und Griffschenkel 44 verlau­fender Spannschenkel 46 an, wobei der Winkel α des Spann­schenkels 46 mit dem Lagerschenkel 38 etwas geringer als 90° ist.The bearing leg 38 of the respective clamping lever 32 is extended by a handle leg 44. In a central area between the bearing axis and the free end of the handle leg 44, an approximately perpendicular to the longitudinal direction of the bearing leg 38 and the handle leg 44 extends clamping leg 46, the angle α of the clamping leg 46 with the bearing leg 38 being slightly less than 90 °.

An parallel zur Einsetzrichtung des Druckkopfes 10 in das Trägerteil 20 gerichteten Armen 48 ist jeweils eine Rast­nase 50 angeordnet, die eine in der Figur 2 zu erkennende rampenförmige Einweisungsfläche 52 aufweist.Arranged in each case on arms 48 which are directed parallel to the direction of insertion of the print head 10 into the carrier part 20 and which has a ramp-shaped instruction surface 52 which can be seen in FIG.

Figur 3 zeigt den in die Halterungsvorrichtung 18 einge­setzten Druckkopf 10 bei noch geöffneten Spannhebeln 32. Zum Verriegeln des Druckkopfes 10 in der Halterungsvor­ richtung 18 werden die Spannhebel 32 in Richtung der Pfei­le C in Figur 3 verschwenkt. Dabei kommen zunächst die Spannschenkel 46 auf der Oberseite der Verriegelungsplatte 16 zur Anlage. Gleichzeitig gleiten die Griffschenkel 44 über die schrägen Einweisungsflächen 52 der Nasen 50, wobei die Spannhebel 32 in Richtung des Pfeiles D in Figur 5 aus­gelenkt werden, bis sie hinter den Nasen 50 einschnappen. Dabei wurde der Spannschenkel jeweils entgegen der Schwenk­richtung des Pfeiles C verspannt, so daß eine entsprechende Haltekraft auf die Verriegelungsplatte 16 einwirkt, um den Druckkopf 10 fest gegen die Anlagefläche 24 zu spannen. Die Verriegelungsstellung der Spannhebel 32 ist in Figur 4 dargestellt. In der Verriegelungsstellung liegt die in der Figur 1 erkennbare Nockenfläche 54 an dem Lagerschenkel 38 des jeweiligen Spannhebels 32 flach an der Endfläche 56 des Spaltes 36 der Lagergabel 30 an und bildet somit einen An­schlag für das Verspannen des Spannhebels 32, bis dessen Griffschenkel 44 hinter der jeweiligen Rastnase 50 ein­rasten kann.FIG. 3 shows the printhead 10 inserted into the holding device 18 with the tension levers 32 still open. For locking the printhead 10 in the holder Direction 18, the clamping lever 32 are pivoted in the direction of arrows C in Figure 3. First, the clamping legs 46 come to rest on the upper side of the locking plate 16. At the same time, the grip legs 44 slide over the inclined instruction surfaces 52 of the lugs 50, the clamping levers 32 being deflected in the direction of the arrow D in FIG. 5 until they snap behind the lugs 50. The clamping leg was braced against the pivoting direction of the arrow C, so that a corresponding holding force acts on the locking plate 16 in order to clamp the print head 10 firmly against the contact surface 24. The locking position of the clamping lever 32 is shown in Figure 4. In the locked position, the cam surface 54 that can be seen in FIG. 1 lies flat on the bearing leg 38 of the respective tensioning lever 32 on the end surface 56 of the gap 36 of the bearing fork 30 and thus forms a stop for tensioning the tensioning lever 32 until its handle leg 44 behind the each latch 50 can snap into place.

Zum Lösen der Spannhebel 32 müssen diese wiederum aus der in der Figur 4 dargestellten Verriegelungsstellung in Rich­tung des Pfeiles D in Figur 5 ausgelenkt und über die Rast­nasen 50 angehoben werden, bis sie entgegen der Richtung der Pfeiles C in ihre in den Figuren 1 und 3 dargestellte Freigabestellung verschwenkt werden können.To release the tensioning levers 32, these in turn have to be deflected from the locking position shown in FIG. 4 in the direction of arrow D in FIG. 5 and raised over the latching lugs 50 until they move in the direction shown by arrows C in FIGS. 1 and 3 Release position can be pivoted.

Wie die vorstehende Beschreibung zeigt, besteht die gesamte Halterungsvorrichtung aus drei jeweils einstückigen Teilen, wobei die beiden Spannhebel identisch sind. Diese Teile können auf einfache und preiswerte Weise beispielsweise aus Kunststoff gefertigt und auf einfache Weise montiert werden. Das Verriegeln und Entriegeln ist außerordentlich einfach, so daß ein Druckkopfwechsel sehr rasch und be­quem durchgeführt werden kann.As the above description shows, the entire mounting device consists of three one-piece parts, the two clamping levers being identical. These parts can be manufactured in a simple and inexpensive manner, for example from plastic, and can be easily assembled. Locking and unlocking is extraordinary simple, so that a printhead change can be carried out very quickly and easily.

Claims (10)

1. Vorrichtung zur Halterung eines Druckkopfes (10) an dem Druckkopfschlitten eines Druckers, umfassend ein an dem Druckkopfschlitten befestigbares Trägerteil (20) mit einer Anlageflächen für den Druckkopf (10) aufweisenden Druckkopfaufnahme (22, 24) und Spannmitteln (32) zum Andrücken des Druckkopfes (10) an die Anlageflächen, dadurch gekennzeichnet, daß die Spann­mittel zwei Spannhebel (32) umfassen, die beiderseits der Druckkopfaufnahme (22, 24) an dem Trägerteil (20) zwischen einer Freigabestellung und einer Verriegelungs­stellung schwenkbar gelagert sind und jeweils einen zum Hintergreifen einer Spannfläche (16) am Druckkopf (10) bestimmte Spannschenkel (46) aufweisen, und daß an dem Trägerteil (20) und den Spannhebeln (32) Rastmittel (50, 44) ausgebildet sind, die in der Verriegelungsstellung der Spannhebel (32) miteinander in Eingriff treten.1. Device for holding a printhead (10) on the printhead carriage of a printer, comprising a support part (20) which can be fastened to the printhead carriage and has a contact surface for the printhead (10), printhead receptacle (22, 24) and clamping means (32) for pressing the Printhead (10) on the contact surfaces, characterized in that the clamping means comprise two clamping levers (32) which are pivotally mounted on both sides of the printhead receptacle (22, 24) on the carrier part (20) between a release position and a locking position and one each for reaching behind have a clamping surface (16) on the print head (10) certain clamping legs (46), and that on the Carrier part (20) and the clamping levers (32) locking means (50, 44) are formed, which come into engagement with each other in the locking position of the clamping levers (32). 2. Vorrichtung nach Anspruch 1, dadurch gekenn­zeichnet, daß die Spannhebel (32) jeweils mit einem einen Winkel mit dem Spannschenkel (46) bildenden Lagerschenkel (38) in einer Lagergabel (30) des Träger­teils (20) schwenkbar gelagert sind.2. Apparatus according to claim 1, characterized in that the clamping levers (32) are each pivotably mounted at an angle with the clamping leg (46) forming bearing legs (38) in a bearing fork (30) of the carrier part (20). 3. Vorrichtung nach Anspruch 2, dadurch gekenn­zeichnet, daß der Lagerschenkel (38) einen Lager­bolzen trägt, der in einen U-förmigen Lagerschlitz (42) in dem Trägerteil (20) einklipsbar ist.3. Apparatus according to claim 2, characterized in that the bearing leg (38) carries a bearing pin which can be clipped into a U-shaped bearing slot (42) in the carrier part (20). 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Rastmittel an dem Trägerteil (20) von mit Rampenflächen (52) versehenen Nasen (50) gebildet sind, die in den Schwenkweg der Spann­hebel (32) ragen.4. Device according to one of claims 1 to 3, characterized in that the latching means on the carrier part (20) by ramp surfaces (52) provided lugs (50) are formed, which protrude into the pivoting path of the clamping lever (32). 5. Vorrichtung nach Anspruch 4, dadurch gekenn­zeichnet, daß die Nasen (50) jeweils an einem mit dem Trägerteil (20) verbundenen Arm (48) angeordnet sind, wobei ihr Abstand von der Lagerachse (40) des je­weiligen Spannhebels (32) größer als der Abstand der Spannschenkel (46) von der Lagerachse (40) ist und wobei der Spannhebel (32) einen den Lagerschenkel (38) über den Spannschenkel (46) hinaus fortsetzenden Griffschenkel (44) aufweist, der in der Verriegelungsstellung des je­weiligen Spannhebels (32) die Nase (50) hintergreift.5. The device according to claim 4, characterized in that the lugs (50) are each arranged on an arm (48) connected to the carrier part (20), their distance from the bearing axis (40) of the respective clamping lever (32) being greater than the distance of the tensioning legs (46) from the bearing axis (40) and wherein the tensioning lever (32) has a handle leg (44) which continues the bearing leg (38) beyond the tensioning leg (46) and which, when the respective tensioning lever (32 ) engages behind the nose (50). 6. Vorrichtung nach Anspruch 5, dadurch gekenn­zeichnet, daß der Spannschenkel (46) relativ zu dem Lagerschenkel (38) und dem Griffschenkel (44) des jeweiligen Spannhebels (32) so gerichtet ist, daß er in der Verriegelungsstellung des Spannhebels (32) unter Vor­spannung an der Spannfläche (16) des Druckkopfes (10) anliegt.6. The device according to claim 5, characterized in that the clamping leg (46) relative to the bearing leg (38) and the handle leg (44) of the respective clamping lever (32) is directed so that it in the locking position of the clamping lever (32) under Preload is present on the clamping surface (16) of the printhead (10). 7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Spannhebel (32) einstückig aus einem mindestens geringfügig elastisch verformbaren Material hergestellt sind.7. Device according to one of claims 1 to 6, characterized in that the clamping levers (32) are made in one piece from an at least slightly elastically deformable material. 8. Vorrichtung nach einem der Ansprüche 2 bis 7, dadurch gekennzeichnet, daß an dem Lagerschenkel (38) des jeweiligen Spannhebels (32) eine Nockenfläche (54) ausgebildet ist, die in der Verriegelungsstellung an einer Anschlagfläche der Lagergabel des Trägerteils anliegt.8. Device according to one of claims 2 to 7, characterized in that on the bearing leg (38) of the respective clamping lever (32) is formed a cam surface (54) which bears in the locking position on a stop surface of the bearing fork of the carrier part. 9. Vorrichtung nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß an dem Trägerteil (20) mindestens ein Justierelement (26) ausgebildet ist, das zum Eingriff mit einem Gegenelement (28) am Druck­kopf (10) bestimmt ist.9. Device according to one of claims 1 to 8, characterized in that on the carrier part (20) at least one adjusting element (26) is formed, which is intended for engagement with a counter element (28) on the print head (10). 10. Vorrichtung nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß die Spannhebel (32) identisch geformt sind.10. Device according to one of claims 1 to 9, characterized in that the clamping levers (32) are shaped identically.
EP89102605A 1988-03-15 1989-02-15 Mounting of a print head Expired - Lifetime EP0332863B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89102605T ATE76000T1 (en) 1988-03-15 1989-02-15 DEVICE FOR HOLDING A PRINT HEAD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3808648 1988-03-15
DE3808648A DE3808648C1 (en) 1988-03-15 1988-03-15

Publications (3)

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EP0332863A2 true EP0332863A2 (en) 1989-09-20
EP0332863A3 EP0332863A3 (en) 1990-01-17
EP0332863B1 EP0332863B1 (en) 1992-05-13

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Application Number Title Priority Date Filing Date
EP89102605A Expired - Lifetime EP0332863B1 (en) 1988-03-15 1989-02-15 Mounting of a print head

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EP (1) EP0332863B1 (en)
AT (1) ATE76000T1 (en)
DE (1) DE3808648C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0602709A1 (en) * 1992-12-14 1994-06-22 Agfa-Gevaert N.V. Thermal image-recording apparatus with locking means for holding a print head

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418821B1 (en) * 1989-09-18 1997-12-29 Canon Kabushiki Kaisha Ink jet recording head carriage and an apparatus with same

Citations (4)

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Publication number Priority date Publication date Assignee Title
US3921780A (en) * 1974-07-18 1975-11-25 Gen Electric Assembly for mounting a print head
US3960255A (en) * 1974-05-10 1976-06-01 Ing. C. Olivetti & C., S.P.A. Mounting mechanism for a non-impact dots-matrix print head
JPS60105569A (en) * 1983-11-14 1985-06-11 Tokyo Electric Co Ltd Printing head retaining mechanism for printing device
GB2172929A (en) * 1985-03-26 1986-10-01 Seiko Epson Corp Releasable mounting for, for example, a print head

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Publication number Priority date Publication date Assignee Title
JPS58104781A (en) * 1981-12-16 1983-06-22 Tokyo Electric Co Ltd Printer

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Publication number Priority date Publication date Assignee Title
US3960255A (en) * 1974-05-10 1976-06-01 Ing. C. Olivetti & C., S.P.A. Mounting mechanism for a non-impact dots-matrix print head
US3921780A (en) * 1974-07-18 1975-11-25 Gen Electric Assembly for mounting a print head
JPS60105569A (en) * 1983-11-14 1985-06-11 Tokyo Electric Co Ltd Printing head retaining mechanism for printing device
GB2172929A (en) * 1985-03-26 1986-10-01 Seiko Epson Corp Releasable mounting for, for example, a print head

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0602709A1 (en) * 1992-12-14 1994-06-22 Agfa-Gevaert N.V. Thermal image-recording apparatus with locking means for holding a print head

Also Published As

Publication number Publication date
ATE76000T1 (en) 1992-05-15
EP0332863A3 (en) 1990-01-17
DE3808648C1 (en) 1989-04-27
EP0332863B1 (en) 1992-05-13

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