US20050038464A1 - Adjustable lancet device and method - Google Patents
Adjustable lancet device and method Download PDFInfo
- Publication number
- US20050038464A1 US20050038464A1 US10/641,101 US64110103A US2005038464A1 US 20050038464 A1 US20050038464 A1 US 20050038464A1 US 64110103 A US64110103 A US 64110103A US 2005038464 A1 US2005038464 A1 US 2005038464A1
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- United States
- Prior art keywords
- lancet device
- lancet
- holding member
- cam disk
- projection
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150274—Manufacture or production processes or steps for blood sampling devices
- A61B5/15029—Manufacture or production processes or steps for blood sampling devices for driving devices, i.e. means for driving the piercing element
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/150022—Source of blood for capillary blood or interstitial fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150175—Adjustment of penetration depth
- A61B5/15019—Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
- A61B5/150381—Design of piercing elements
- A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150801—Means for facilitating use, e.g. by people with impaired vision; means for indicating when used correctly or incorrectly; means for alarming
- A61B5/150824—Means for facilitating use, e.g. by people with impaired vision; means for indicating when used correctly or incorrectly; means for alarming by visual feedback
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15103—Piercing procedure
- A61B5/15107—Piercing being assisted by a triggering mechanism
- A61B5/15113—Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15115—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
- A61B5/15117—Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15101—Details
- A61B5/15126—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides
- A61B5/1513—Means for controlling the lancing movement, e.g. 2D- or 3D-shaped elements, tooth-shaped elements or sliding guides comprising linear sliding guides
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
- A61B5/15188—Constructional features of reusable driving devices
- A61B5/1519—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for propelling the piercing unit
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
- A61B5/15186—Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
- A61B5/15188—Constructional features of reusable driving devices
- A61B5/15192—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for retracting the lancet unit into the driving device housing
- A61B5/15194—Constructional features of reusable driving devices comprising driving means, e.g. a spring, for retracting the lancet unit into the driving device housing fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin
Abstract
Description
- 1. Field of the Invention
- The invention relates to a lancet device having an adjusting capability, and a method of using a lancet device. In particular, the invention relates to a lancet device which utilizes an adjustable depth penetration. Lancet devices are used to penetrate and puncture the skin in order to allow the taking of a blood sample for testing. The present device allows the user to control the depth of this penetration by a simple adjustment mechanism.
- 2. Discussion of Background Information
- Lancet devices are commonly used to prick the skin of the user so that one or more drops of blood may be extracted for testing. Some users, such as diabetics, for example, may have to test their blood sugar levels several times a day. This may be accomplished by the user using a simple needle. However, this procedure is often problematic for the user since the needle may be difficult to handle. Moreover, controlling the depth of penetration cannot be reliably accomplished without the use of a mechanical device. Additionally, many users simply cannot perform the procedure owing to either a fear of needles or because they lack a steady hand. As a result, lancet devices have been developed which allow the user to more easily and reliably perform this procedure.
- Most lancet devices lack convenient and flexible adjustability. Such devices are typically made adjustable by switching their tips. U.S. Pat. No. Re. 32,922 to LEVIN et al. is one such device. That is, the user must remove one tip having a set depth and replace it with another having a different set depth. This, of course, creates the problem of storing the replaceable tips, which if not properly done, may result in their misplacement, damage, contamination, or the like.
- An improved device would allow the user to more easily adjust the depth of penetration and would overcome some of the disadvantages described above. Moreover, since the skin thickness can vary slightly from user to user and finger to finger, a need exists for efficiently adapting the depth of penetration. For example, an index finger may be more calloused than a middle finger, and the more calloused finger will typically have thicker skin. By adjusting the depth of puncture so that the depth is no greater than necessary for extracting a required amount of blood, any pain experienced by the user may be minimized.
- Lancets having an adjustable tip are known per se. For example, U.S. Pat. No. 4,469,110 to SLAMA discloses a mechanism which adjusts the penetration depth by rotating a threaded sleeve relative to a body. The SLAMA device is characterized as a “single bottom” device which employs a threaded design which can be expensive to manufacture. Moreover, such a device may require the user to rotate the threaded sleeve up to 360 degrees and more in order to attain the proper depth setting. Further, such a threaded resign is prone to inadvertent setting changes since there is nothing but frictional engagement between the mating threads to maintain the adjustment setting.
- U.S. Pat. No. 4,895,147 to BODICKY et al. functions in a similar manner to the device in SLAMA and therefore suffers from similar disadvantages.
- U.S. Pat. Nos. 5,464,418, 5,797,942, 5,908,434, 6,156,051 and 6,530,937 to SCHRAGA also disclose similar lancet devices and are hereby incorporated herein by reference as though set forth in full herein.
- As disclosed in U.S. Pat. No. 5,908,434, the lancet device has a body portion which encloses a lancet and a lancet firing mechanism. The lancet typically has a needle extending therefrom and is caused to move towards the tip of the device by a trigger or firing mechanism. The lancet device forces the needle, by virtue of the needle being fixed thereto, out of the device by some distance or depth so that the needle can penetrate the skin of the user. The function of this firing mechanism and the lancet body design is disclosed in each of U.S. Pat. Nos. 5,797,942 and 5,908,434. These Patents are incorporated by reference herein in their entirety and are therefore only briefly discussed herein.
- What is needed is a lancet device which can accurately and precisely control the depth of penetration of the needle relative to the surface of the user's skin while also being easy to use. It is also desirable for the user to be able to use and adjust the depth penetrating setting with just one hand and/or with less effort that currently required with existing lancet devices.
- Thus, while advances have been made, there is a continuing need for a lancet device which provides for convenient, reliable and easy adjustment of penetration depth.
- According to one aspect of the invention there is provided a lancet device that includes a body. A trigger is mounted to the body. A front cover includes a skin engaging end that includes a lancet opening through which a lancet needle extends. A holding member is movably mounted within the body and comprises a front end and a rear end. The front end is configured to receive a lancet. A stop surface moves with the holding member. A cam disk includes cam surfaces which can be contacted by the stop surface. The cam disk is configured to rotate at least partially. The cam disk rotates about an axis that is not parallel to an axis running through at least one of the lancet opening and the holding member.
- The lancet device may further comprise a back cap configured to move between a retracted position and an original position. The back cap may be configured to move the holding member to a retracted position. The back cap may be coupled to a surface that engages the rear end of the holding member. The back cap may be coupled to in inner sleeve that includes a surface that engages the rear end of the holding member. The inner sleeve may comprise an opening that receives a rear end of the holding member. The back cap may be coupled to in inner sleeve that includes a surface that engages projections disposed on the rear end of the holding member.
- The lancet device may further comprise a spring for biasing the back cap towards an original position. The lancet device may further comprise a first spring for biasing the holding member towards an extended position and a second spring for biasing the holding member in an opposite direction. The first and second springs may be arranged within an axial opening of the holding member. The first spring may contact one side of a projection extending inwardly from the body and wherein the second spring may contact another side of the projection. The projection may extend into an elongated slot formed in the holding member.
- The lancet device may further comprise an end plug mounted to the rear end of the holding member. The first spring may be disposed between the projection and an inner wall surface arranged in the area of the front end of the holding member and wherein the second spring is disposed between the projection and the end plug. The trigger may be movably mounted to the body. The front cover may be removably mounted to the body. The holding member may comprise a projection that includes the stop surface. The holding member may comprise an integrally formed projection that includes the stop surface. The front end may comprise an opening that is configured to removably receive the lancet.
- The lancet device may further comprise a deflecting member configured to be deflected by the trigger. The deflecting member may be coupled to the holding member. The deflecting member may comprise a first stop surface that contacts a first surface of a holding projection extending inwardly from the body. The deflecting member may comprise a second stop surface that contacts a second surface of the holding projection. The cam disk may comprise indicia. The cam surfaces may be arranged on a cam section of the cam disk, the cam section being disposed on a side of the cam disk that is opposite a side that includes the indicia. The cam disk may comprise a centrally disposed opening that is mounted to a journal within the body. The journal may be coupled to the body. The journal may extend inwardly from the body. The journal may comprise a center axis that is generally perpendicular to the axis running through the holding member. The cam disk may rotate about an axis that is generally perpendicular to an axis running through at least one of the lancet opening and the holding member. The cam disk may be disposed between the trigger and a back cap. The body may comprise a two piece body. The cam disk may be coupled to one of the two pieces of the two piece body. The front cover may be removably mounted to the two piece body. The lancet device may further comprise a back cap movably mounted to the two piece body. The body may comprise at least one curved side indentation through which the cam disk protrudes. The body may comprise two oppositely arranged curved side indentations through which portions of the cam disk protrude. The body may comprise a mechanism for viewing indicia of the cam disk. The mechanism for viewing indicia of the cam disk may comprise an opening. The lancet device may further comprise a retaining element for one of axially retaining the cam disk and securing the cam disk to the body.
- The invention also provides a method of puncturing a surface of skin using the lancet device described above, wherein the method comprises adjusting a set depth of penetration of the needle by moving the cam disk to a desired set position, disposing the skin engaging end of the lancet device against a user's skin, and triggering the trigger to cause the lancet needle to penetrate the user's skin, wherein the puncture allows a blood sample to be taken.
- The invention also provides a method of using the lancet device described above, wherein the method comprises rotating the cam disk to a desired set position, moving the holding member to a retracted position, maintaining the holding member in the retracted position until the trigger is triggered, disposing the skin engaging end of the lancet device against a user's skin, and triggering the trigger to cause movement of the holding member.
- The invention also provides a lancet device, that includes a body, a trigger, a front cover comprising a skin engaging end that includes a lancet opening through which a lancet needle extends. A holding member is movably mounted within the body and comprising a front end a rear end. The front end is configured to receive a lancet. A stop projection is coupled to the holding member. A cam disk comprises indicia and cam surfaces which can be contacted by the stop projection. The cam disk is configured to rotate at least partially. The cam disk is mounted to a projection that extends inwardly from the body.
- The invention also provides a lancet device comprising a body, a trigger, a front cover comprising a skin engaging end that includes a lancet opening through which a lancet needle extends. A holding member is movably mounted within the body and comprising a front end a rear end. The front end is configured to receive a lancet. A back cap is configured to move the holding member to a retracted position. A stop surface is coupled to the holding member. A cam disk is at least partially arranged within the body. The cam disk comprises indicia and cam surfaces which can be contacted by the stop projection. The cam disk is configured to rotate at least partially. The cam disk protrudes from at least one side wall of the body.
- Other exemplary embodiments and advantages of the present invention may be ascertained by reviewing the present disclosure and the accompanying drawing.
- The present invention is further described in the detailed description which follows, in reference to the noted plurality of drawings by way of non-limiting examples of exemplary embodiments of the present invention, in which like reference numerals represent similar parts throughout the several views of the drawings, and wherein:
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FIG. 1 shows a side cross-section view of one embodiment of the lancet device. The device is shown in the loaded (trigger set) position. The lancet is not shown in cross-section; -
FIG. 2 shows a side cross-section view of the embodiment ofFIG. 1 . The device is shown with the lancet needle moving toward a pre-set depth position after it has been triggered; -
FIG. 3 shows a side cross-section view of the embodiment shown inFIG. 1 . The device is shown with the lancet needle at a pre-set depth position; -
FIG. 4 shows a top cross-section view of the embodiment shown inFIG. 1 and in the position shown inFIG. 2 ; -
FIG. 5 shows a side cross-section view of the embodiment shown inFIG. 1 . The device is shown in the loaded (trigger set) position after it has been so positioned by a trigger setting mechanism; -
FIG. 6A shows a top view of the embodiment shown inFIG. 1 ; -
FIG. 6B shows a side view of the embodiment shown inFIG. 6A ; -
FIG. 6C shows a front view of the embodiment shown inFIG. 6B ; -
FIG. 7A shows a top view of the upper body part of the lancet device shown inFIG. 1 ; -
FIG. 7B shows a cross-section view of the upper body part shown inFIG. 7A ; -
FIG. 7C shows a bottom view of the upper body part shown inFIG. 7A ; -
FIG. 7D shows a front view of the upper body part shown inFIG. 7A ; -
FIG. 8A shows a top view of the lower body part of the lancet device shown inFIG. 1 ; -
FIG. 8B shows a cross-section view of the lower body part shown inFIG. 8A ; -
FIG. 8C shows a bottom view of the lower body part shown inFIG. 8A ; -
FIG. 8D shows a front view of the lower body part shown inFIG. 8A ; -
FIG. 9A shows a top cross-section view of the front cover of the lancet device shown inFIG. 1 ; -
FIG. 9B shows a top view of the front cover shown inFIG. 9A ; -
FIG. 9C shows a side cross-section view of the front cover shown inFIG. 9A ; -
FIG. 9D shows a side view of the front cover shown inFIG. 9A ; -
FIG. 9E shows a partial front view of the front cover shown inFIG. 9A ; -
FIG. 9F shows an enlarged view of the circled portion shown inFIG. 9C ; -
FIG. 10A shows a rear end view of the back cap (trigger setting cap) of the lancet device shown inFIG. 1 ; -
FIG. 10B shows a side view of the back cover shown inFIG. 10A ; -
FIG. 10C shows a side cross-section view of the back cap shown inFIG. 10B ; -
FIG. 10D shows an enlarged view of the circled portion shown inFIG. 10C ; -
FIG. 10E shows a top view of the back cap shown inFIG. 10B ; -
FIG. 10F shows a top cross-section view of the back cap shown inFIG. 10E ; -
FIG. 11A shows a top view of the inner sleeve member of the lancet device shown inFIG. 1 ; -
FIG. 11B shows a front view of the profiled opening of the inner sleeve member shown inFIG. 11A ; -
FIG. 11C shows an enlarged view of the circled portion shown inFIG. 11A ; -
FIG. 11D shows a rear end view of the inner sleeve shown inFIG. 11A ; -
FIG. 11E shows a side cross-section view of the inner sleeve shown inFIG. 11A ; -
FIG. 12A shows a top view of the retaining member of the lancet device shown inFIG. 1 ; -
FIG. 12B shows a side view of the retaining member shown inFIG. 12A ; -
FIG. 13A shows a side view of the end plug of the lancet device shown inFIG. 1 ; -
FIG. 13B shows a front end view of the end plug shown inFIG. 13A ; -
FIG. 13C shows an enlarged view of the circled portion shown inFIG. 13A ; -
FIG. 14A shows a top view of the trigger element of the lancet device shown inFIG. 1 ; -
FIG. 14B shows a side view of the trigger element shown inFIG. 14A ; -
FIG. 14C shows a front view of the trigger element shown inFIG. 14B ; -
FIG. 15A shows a top view of the holding member of the lancet device shown inFIG. 1 ; -
FIG. 15B shows a side cross-section view of the holding member shown inFIG. 15A ; -
FIG. 15C shows a front view of the holding member shown inFIG. 15B ; -
FIG. 15D shows an enlarged view of the small circled portion shown inFIG. 15B ; -
FIG. 15E shows an enlarged view of the large circled portion shown inFIG. 15B ; -
FIG. 16A shows a top view of the cam disk of the lancet device shown inFIG. 1 ; -
FIG. 16B shows a bottom view of the cam disk shown inFIG. 16A ; -
FIG. 16C shows an enlarged view of the cam portion of the cam disk shown inFIG. 16B ; and -
FIG. 16D shows a side cross-section view of the cam disk shown inFIG. 16B ; - The particulars shown herein are by way of example and for purposes of illustrative discussion of the embodiments of the present invention only and are presented in the cause of providing what is believed to be the most useful and readily understood description of the principles and conceptual aspects of the present invention. In this regard, no attempt is made to show structural details of the present invention in more detail than is necessary for the fundamental understanding of the present invention, the description taken with the drawings making apparent to those skilled in the art how the several forms of the present invention may be embodied in practice.
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FIG. 1 shows a side cross-section side view of one embodiment of lancet device (thelancet 10 is not shown in cross-section). Lancet device LD has a lancet body made up of anupper body portion 100 and alower body portion 110. Theseparts member 30 is movably disposed within thebody parts front cover 20 is removably connected or attached to a front portion of thebody parts front cover 20, one can gain access to thelancet 10. Thelancet 10 can thus be removed and replaced with anew lancet 10 as necessary, once thefront cover 20 is removed. As in many prior art lancet devices, the lancet device defines a plane P which is configured to contact (i.e., be positioned against) a user's skin. However, unlike known lancet devices, the instant embodiment may utilize an inwardly curved surface plane P beyond which the lancet need can extend. Next, aback cap 80 is arranged at a rear portion of thebody parts back cap 80 has a rear portion that can be gripped by a user and a front portion that slides within thebody parts inner sleeve 70 is connected (after being slid into the back cap 80) to theback cap 80 upon assembly of the lancet device. Movement ofback cap 80 rearwardly causes the holdingmember 30 to retract until it reaches the loaded position shown inFIG. 1 , as will be described in more detail later on. Thelancet 10 itself is conventional and includes a needle. It can be replaced, as is the case in many prior art lancet devices. To ensure thatlancet 10 is securely (yet removably) retained within the lancet device, the holdingmember 30 includes a lancet holding end which receives thelancet 10 therein. - As can be seen in
FIG. 1 , the holdingmember 30 preferably has three springs mounted thereto. In this regard, a first spring S1, which can be made of spring steel, is arranged within the holdingmember 30, just behind the lancet receiving portion. This spring S1 causes (and/or biases) the holdingmember 30 to move towards an extended position once atrigger 40 is activated. Thetrigger 40 includes a portion that is arranged within thebody part 100 and is also mounted toupper body part 100. Thetrigger 40 also has a finger engaging (e.g. push button) portion that can be pushed into the lancet device. Thetrigger 40 functions as a spring in that it is capable of deflecting inwards (seeFIG. 2 ) when force is applied to the finger engaging portion, and also capable of returning to a pre-deflection position (seeFIGS. 1 and 3 ). A second spring S2, which can be made of spring steel, is also arranged within the holdingmember 30, but behind the first spring S1. This spring S2 causes (and/or biases) the holdingmember 30 to move back towards a retracted position once thelancet 10 reaches the extended position. In this way, the lancet 10 (and holding member 30) is automatically retracted after puncturing the skin of a user. A third spring S3, which can also be made of spring steel, is externally mounted to a rear portion of the holdingmember 30. This spring S3 causes (and/or biases) the back cap 80 (and attached inner sleeve 70) to move inwardly withingbody parts FIG. 1 ), a user need only move backcap 80 rearwardly (seeFIG. 5 ). This in turn compresses the third spring S3 to a certain extent. However, when the user releases theback cap 80, spring S3 causes theback cap 80 to return to the position shown inFIGS. 1-4 . - The lancet device LD also utilizes a
cam disk 60 to adjust the penetration depth of the lancet needle. Thecam disk 60 is preferably mounted to theupper body part 100 so as to be at least partially rotatable in each of two directions. Of course, thecam disk 60 can be mounted within the body in any desired manner provided it functions properly. To ensure that thecam disk 60 is axially retained tobody part 100, yet allowed to rotate with respect toupper body part 110, a retainingmember 50 is utilized. As will be more fully described in detail later on, thecam disk 60 has a plurality of cam surfaces 60 e 1-60 e 8 (seeFIG. 16C ) which are configured to be engaged by a stop projection 30 j (in particular stop surface 30 i of stop projection 30 j) that is formed on or coupled to the holdingmember 30. Finally, the lancet device LD also utilizes anend plug 90 that ensures that the spring S2 is retained within the holdingmember 30. - As described above,
FIG. 1 shows the lancet device LD with thelancet member 30 in the loaded position, i.e., ready to move to an extended position when thetrigger 40 is pressed. The holdingmember 30 retains the loaded position ofFIG. 1 as a result of engagement between a deflectingmember 30 c and a shoulder 100 i of theupper body part 100. On the other hand,FIG. 2 shows what happens when thetrigger 40 is pressed, i.e., thetrigger 40 is caused to be deflected inwardly. That is, the holdingmember 30 is released from the loaded position ofFIG. 1 and is caused to move towards plane P. This occurs because thetrigger 40 causes the deflectingmember 30 c to disengage from the shoulder 100 i of theupper body part 100. As discussed above, this movement is caused by the expansion (in the direction of a the axis of the holding member 30) of first spring S1. The holdingmember 30 continues to move towards the plane P until the stop projection 30 j contacts or engages one of the stop surfaces 60 e 1-60e 8 of thecam disk 60. Once thetrigger 40 is released (once a user stops pressing on the trigger 40), thetrigger 40 preferably moves back (e.g., automatically) to an un-deflected state shown inFIG. 3 . The lancet device is then ready to be reloaded, i.e., it can then be placed back into the position shown inFIG. 1 . -
FIG. 3 shows the lancet device with the holdingmember 30 in one of the pre-set extended positions, i.e., in one of the extended positions that will cause a desired puncture depth in the skin of a user (not shown). The distance that the lancet needle projects past plane P is thus determined by rotating thecam disk 60 until the desired setting is reached. This setting, in turn, causes a particular stop surface (i.e., one of surfaces 60 e 1-60 e 8) to be placed in the path of the stop projection 30 j. The various stop surfaces (e.g., 8 surfaces shown in FIGS. 16A-D) of thecam disk 60 thus determine how much the holdingmember 30 will move in the extended position relative to the plane P. In this regard,FIG. 3 shows contact between the stop projection 30 j and one of the surfaces 60 e 1-60e 8 of thecam disk 60.FIG. 3 also shows the needle tip projecting through the opening in thefront cover 20 and past the plane P. And, as discussed above, thetrigger 40 has returned to a non-deflected original position. -
FIG. 4 shows a top cross-section view of the lancet device ofFIG. 1 . In this regard, the holdingmember 30 is in the position shown inFIG. 2 . As this figure illustrates, theupper body part 100 has been removed to expose a top view of thelower body part 110. As inFIGS. 1-3 , thefront cover 20, backcap 80,inner sleeve 70,end plug 90, holdingmember 30 andlancet 10 can be seen in their installed and/or assembled position. However, this figure allows one to more clearly see that the first spring S1 is arranged within the holdingmember 30, just behind the lancet receiving portion. The first spring S1 is preferably sized to slide into an internal opening 30 p of the holdingmember 30. More particularly, the first spring S1 is preferably disposed inside the holdingmember 30 and between an inner wall 30 n (just behind lancet 10) of the holdingmember 30 and a projectingguide member 110 h of thelower body part 110. That is, the first spring S1 is axially retained between a right side surface of projectingguide member 110 h and the inner wall 30 n of the holdingmember 30. As a result, the first spring S1 is caused to be compressed when the holdingmember 30 is moved back (i.e., to the left) to a retracted position relative to thelower body part 110. The projectingguide member 110 h does not move because it is fixed to thelower body portion 110. Of course, the projectingguide member 110 h can be arranged and/or mounted within the body in any desired manner provided it functions for its intended purpose. As discussed above, the first spring S1 causes (and/or biases) the holdingmember 30 towards an extended position once a trigger 40 (not shown inFIG. 4 ) is activated. As a result, the holdingmember 30 cannot be moved back to a retracted position without causing the first spring S1 to be compressed thereby. - The second spring S2 is also preferably sized to slide into an internal opening 30 p of the holding
member 30. More particularly, the second spring S2 is disposed inside the holdingmember 30 and between an inner wall 90 a of theend plug 90 and the projectingguide member 110 h of thelower body part 110. That is, the second spring S2 is axially retained between a left side surface of projectingguide member 110 h and the inner wall 90 a of theend plug 90. The second spring S2 is caused to be compressed when the holdingmember 30 is moved forward (i.e., to the right) to an extended position relative to thelower body part 110. Again, the projectingguide member 110 h does not move because it if fixed to thelower body portion 110. As discussed above, the second spring S2 causes (and/or biases) the holdingmember 30 towards a retracted position once the holdingmember 30 reaches the various pre-set extended positions (see e.g.,FIG. 3 ). Thus, the second spring S2 is compressed when the holdingmember 30 is extended by the first spring S1. Spring S2 then expands axially to retract the holdingmember 30. In this way, the lancet needle only momentarily projects past the plane P in the extended position before it is caused to retract back into the lancet device by the second spring S2. As a result, the lancet needle only projects past or beyond the plane P for a very brief time (i.e., a fraction of a second when thetrigger 40 is pressed) and is otherwise not exposed to a user while thefront cover 20 is installed thereon. Accordingly, a user or other innocent bystanders can be protected from being injured unintentionally by an exposed needle. - The third spring S3 is preferably sized to slide over a rear end of the holding
member 30. More particularly, the third spring S3 is disposed over a rear end of the holdingmember 30 and between an inner wall 70 p of theinner sleeve 70 and an annular shoulder 90 c of theend plug 90. That is, the third spring S3 is axially retained between a left side inner surface 70 p of theinner sleeve 70 and the annular shoulder 90 c of theend plug 90. As a result, the third spring S3 is caused to be compressed when theback cap 80 is moved rearward (i.e., to the left as inFIG. 5 ) to an extended position relative to the upper andlower body parts 110, 110 (seeFIG. 1 ). As discussed above, the third spring S3 causes (and/or biases) theback cap 80 towards a retracted position once a user releases the back cap 80 (compareFIG. 5 toFIG. 1 ). Thus, the third spring S3 is compressed when theback cap 80 is pulled backwards to cause the deflectingmember 30 c to seat onto the shoulder 100 i (adjacent the trigger 40) of theupper body part 110. The third spring S3 then expands axially to cause theback cap 80 to move to the right untilshoulders 80 p of theback cap 80 contact end edges 100 b, 110 b of the upper andlower body parts inner sleeve 70 contacts two oppositely arrangedprojections 30 g, 30 h of the holdingmember 30. -
FIG. 5 shows another cross-section side view of the lancet device LD shown inFIG. 1 (thelancet 10 is not shown in cross-section). InFIG. 5 , theback cap 80 is shown in the extended position. As described above, this movement is used to retract the holdingmember 30 until the deflectingmember 30 c engages the shoulder 100 i of theupper body part 100. At this point, the user need only release theback cap 80 so that the third spring S3 will automatically cause theback cap 80 to move or retract towards the lancet device until it assumes the position shown inFIG. 1 . As can be seen when comparingFIGS. 2 and 5 , the first spring S1 becomes compressed axially when theback cap 80 causes the holdingmember 30 to move to a retracted position. As a result, the second spring S2 expands axially (seeFIGS. 2 and 5 ), while the third spring S3 compresses axially (seeFIG. 5 ). However, once theback cap 80 is released, the third spring S3 expands axially —which causes the back cap 80 (and the attached inner sleeve 70) to retract back into the lancet device (seeFIG. 1 ). - FIGS. 6A-C show top, side and front views of the lancet device LD shown in
FIGS. 1-5 . As discussed above, the lancet device has a lancet body made up of anupper body portion 100 and alower body portion 110. Theseparts upper body part 100 and the top edges of thelower body part 110. Thefront cover 20 is preferably removably connected or attached to a front portion of thebody parts lancet 10. Thelancet 10 can thus be removed and replaced with anew lancet 10 as necessary, once thefront cover 20 is removed (not shown). As in many prior art lancet devices, the lancet device defines a plane P which is configured to contact (i.e., be positioned against) a user's skin. However, unlike known lancet devices, the instant embodiment uses an inwardly curved surface as the plane P beyond which the lancet need can extend. As is shown inFIG. 6C , the curved surface plane P has a lancet opening LO through which the lancet needle passes. Theback cap 80 is arranged at a rear portion of thebody parts back cap 80 preferably has a rear portion with projectingtabs 80 j (i.e., two on each side of the back cap). Thesetabs 80 j allow a user to more easily grip theback cap 80. As discussed above, movement ofback cap 80 rearwardly (as inFIG. 5 ) causes the holdingmember 30 to retract until it reaches the loaded position shown inFIG. 1 . - Again, with reference to FIGS. 6A-C, the
trigger 40 preferably has a tear-drop shaped button which can be pressed by a user to cause thelancet 10 to move to the extended position. Thecam disk 60 can be seen to project partially from opposite recessed portions of the upper andlower body parts cam disk 60. In order to allow the user to see which cam surface (one of surfaces 60 e 1-60 e 8) is arranged in the path of the stop projection 30 j (i.e., to adjust the desired depth setting) theupper body part 100 has a window W (e.g., a through opening) through which one can read the indicia (e.g., numbers or other desired indicia such as letters or marks) of thecam disk 60. As should be evident, the lancet device is configured with curved surfaces and an ergonomic shape to enable a user to grip the device more securely, while also being able to rotate thecam disk 60 with one or more fingers of the same hand. Unlike the devices of the prior art, one can adjust the depth of penetration without using both hands. Of course, some users may require two hands to place the lancet device in the loaded position, since they may not be able to pull theback cap 80 backwards without using both hands. - Also notable from FIGS. 6A-C, the
upper body part 100 preferably has an upper inclined and/or slightly curved projecting edge PE. The advantage of this edge PE is that it protects thetrigger 40. That is, it acts to prevent unintentional activation of thetrigger 40. This is because thetrigger 40 is positioned beneath the edge PE so that inadvertent contact with of theupper body part 100 will not cause unintentional movement of thetrigger 40. - To ensure that there is a smooth transition between the various parts of the lancet device, certain edges are preferably made to have a curved and/or profiled arrangement. Thus, the
front cover 20 has circular or curved upper and lower edges (see also FIGS. 9A-B) and complex profile side edges (see also FIGS. 9C-D). Similarly, the upper andlower body parts front cover 20. The upper andlower body parts front cover 20. Theback cap 80 has straight upper, lower and side shoulder edges (see alsoFIGS. 10B and E). Similarly, the upper andlower body parts back cap 80. Additionally, the external surfaces of both theback cap 80 and thefront cover 20 have an arrangement and/or configuration which continues the curved external surfaces of the upper andlower body parts - FIGS. 7A-D show top, side cross-section, bottom and front views of the
upper body part 100. Theupper body part 100 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. Theupper body part 100 may also have be made of ABS—Metallic Silver and have a finish designated as SPI-A2. Additionally, theupper body part 100 may have an overall length that is approximately 2.9″ (i.e., betweenedges 100 a and 100 b). This will ensure that the assembled lancet device can have an overall length of approximately 4.1″. Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, theupper body part 100 may even be made of a plurality of sections of parts which are joined together to form the completeupper body part 100, without leaving the scope of the invention. - The
upper body part 100 preferably has a front straight edge 100 a and includes a circular and/or curved shoulder 100 a 1. The radius of this shoulder 100 a 1 may be approximately 0.4″. As will be described later on with regard toFIG. 9 , the front edge 100 a is configured to slide within wall 20 c until contact occurs between circular and/orcurved edge 20 h and shoulder 100 a 1. A continuous projection 100 a 2 is disposed between front edge 100 a and shoulder 100 a 1. This projection 100 a 2 has a rounded edge that is configured to fit within or otherwise engage a continuous indentation or recess 20 i (seeFIGS. 9A, 9C and 9F). In this regard, the recess 20 i similarly has a rounded bottom that corresponds to the rounded edge of projection 100 a 2. Of course, the projection 100 a 2 need not be continuous, i.e., it does not have to extend continuous from side 100 c toside 100 d. It can instead be formed as intermitted projections or it may have the form of a single short projection that is centrally arranged with respect towalls 100 c and 100 d. Alternatively, thebody part 100 can have the recess while thefront cap 20 has the projection. Of course, other connecting mechanisms, whether conventional or otherwise, may also be utilized in place of the projection and recess connection. - The
upper body part 100 also has a curved projecting edge PE which has already been described. This edge PE extends to therear edge 100 b, and may have a radius of approximately 108″ and/or may be essentially straight. Arranged within the curved projecting edge PE is a tear-drop shaped through opening 100 g. This opening 100 g is sized and configured to receive the push button portion 40 a of the trigger 40 (seeFIG. 14 ). Of course, the opening 100 g can have any desired size, shape or configuration provided it allows a user access to thetrigger 40 and provided that it generally corresponds to the size, shape and configuration of thetrigger 40. The opening 100 g is formed in an upper wall near an inwardly projecting shoulder 100 i. As was described previously, this shoulder 100 i is sized, shaped and/or configured to be engaged by the deflectingmember 30 c (seeFIG. 15 ). In this regard, the projection 100 i has a straight contact surface that is generally parallel toedges 100 a and 100 b and a bottom surface or edge that can range from being generally parallel (relative to the bottom straight edges ofsides 100 c and 100 d) to being tapered or angled by as much as 15 degrees or more. As will be described later on with regard toFIG. 15 , the straight contact surface of projection shoulder 100 i is configured to be engaged bysurface 30c 1 of deflectingmember 30 c and the bottom edge of projection shoulder 100 i is configured to be engaged byportion 30 c 2 of the deflectingmember 30 c. - The
upper body part 100 additionally preferably includes two plate-like projections 100 h which are generally centrally disposed relative tosides 100 c and 100 d. The purpose of theseprojections 100 h is to help guide the deflectingmember 30 c of thelancet holder 30 along a linear path. These projections 00 h may also prevent the holdingmember 30 from rotating within the lancet device. In this regard, theprojections 100 h are spaced apart a distance that is slightly greater than a width of deflectingmember 30 c (seeFIG. 15A ). By ensuring that theprojections 100 h are spaced apart by an amount that is greater than a width of the deflectingmember 30 c, the holdingmember 30 can be allowed to move forward and backwards with the lancet device without rotating. Two C-shaped projections 100 j also extend inwardly from the wall of theupper body part 100. These projections 100 j form an upper half portion of a bearing system for thetrigger 40. Together with the lower projections 110 g (seeFIG. 8 ), i.e., lower half portion of the bearing system, the parts 100 j and 100 g form two circular bearing supports for thetrigger 40. As will be described later on with regard toFIG. 14 , the journal elements 40 c of thetrigger 40 are mounted to the bearing supports 100 j/110 g. Theupper body part 100 additionally preferably includes a connectingrib 100 k that provides strength to theupper body part 100. In order to allow the holdingmember 30 move freely within the lancet device and without being obstructed by therib 100 k, a circular or curved recess (seeFIG. 7D ) is formed in the center of therib 100 k. This recess of therib 100 k can have a radius of approximately 0.15″. - The
upper body part 100 further preferably includes acircular bearing journal 1001 that is generally centrally disposed relative tosides 100 c and 100 d. The purpose of thisjournal 1001 is to provide a rotatable mounting for the cam disk 60 (seeFIG. 16 ). Thejournal 1001 has a cylindrical outer surface on which an inner diameter 60 b ofcam disk 60 rotates. Thejournal 1001 also has an inner recess that includes a cylindrical portion and a rounded bottom end. The cylindrical portion of the recess is sized to receive (i.e., with frictional engagement) the slightly tapered projectingportion 50 b of the retaining member 50 (seeFIG. 12 ). A bearingsurface 100 m is arranged at a bottom end of thejournal 1001. Thissurface 100 m serves to axially retain surface 60 g of thecam disk 60. On the other hand, once the retainingmember 50 is assembled tojournal 1001 so as to trap the cam disk 60 (see e.g.,FIG. 1 ), thecam disk 60 becomes axially retained between the twosurfaces 100 m and 50 d. Of course, the distance betweensurfaces 100 m and 50 d is made to be slightly greater than a thickness (measured between surfaces 60 d and 60 g) of thecam disk 60 so that thecam disk 60 can rotate somewhat freely, i.e., with reduced friction. This is also ensured if there is a slightly lose fit between the outer cylindrical surface ofjournal 1001 and the inner diameter 60 b ofcam disk 60. The bearingsurface 100 m also projects slightly from planar surface 100 n ofupper body part 100. - The
upper body part 100 also includes circular or curved indented and/or recessed side portions 100 e and 100 f. These recesses 100 e and 100 f may have a radius of approximately 0.66″. As described previously, these recessed portions allow a user to access thecam disk 60. That way, the user can use a finger to rotate thecam disk 60 from either side 100 c orside 100 d. As seen inFIG. 7D , thesides 100 c and 100 d can be curved outwardly (i.e., convex) and have a radius of approximately 0.6″. Thesides 100 c and 100 d can also preferably be curved outwardly in the length direction (i.e., seeFIG. 7A ) and have a radius of approximately 16.8″. Therear edge 100 b of theupper body part 100 is a continuous straight edge that is configured to make contact withshoulder 80 p of back cap 80 (seeFIG. 10 ). - FIGS. 8A-D show top, side cross-section, bottom and front views of the
lower body part 110. Thelower body part 110 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. Thelower body part 110 may also have be made of ABS—Metallic Silver and have a finish designated as SPI-A2. Additionally, thelower body part 110 may have an overall length that is approximately 2.9″ (i.e., betweenedges 110 a and 110 b). This will ensure that the assembled lancet device can have an overall length of approximately 4.1″. Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, thelower body part 110 may even be made of a plurality of sections of parts which are joined together to form the completeupper body part 110, without leaving the scope of the invention. - The
lower body part 110 preferably has a front straight edge 110 a and includes a circular and/or curved shoulder 110 a 1. The radius of this shoulder 110 a 1 may be approximately 0.4″. As will be described later on with regard toFIG. 9 , the front edge 110 a is configured to slide withinwall 20 d until contact occurs between circular and/orcurved edge 20 h and shoulder 110 a 1. A continuous projection 110 a 2 is disposed between front edge 110 a and shoulder 110 a 1. This projection 110 a 2 has a rounded edge that is configured to fit within or otherwise engage continuous indentation or recess 20 i (seeFIGS. 9A, 9C and 9F). In this regard, the recess 20 i similarly has a rounded bottom that corresponds to the rounded edge of projection 110 a 2. Of course, the projection 110 a 2 need not be continuous, i.e., it does not have to extend continuous from side 110 c to side 110 d. It can instead be formed as intermitted projections or it may have the form of a single short projection that is centrally arranged with respect to walls 110 c and 110 d. Alternatively, thebody part 110 can have the recess while thefront cap 20 has the projection. Of course, other connecting mechanisms, whether conventional or otherwise, may also be utilized in place of the projection and recess connection. - The
lower body part 110 also preferably has a curved bottom surface 1101. This surface 1101 extends from therear edge 110 b to the shoulder 110 a 1 and may have a radius of approximately 31″ and/or may be essentially straight. Thelower body part 110 additionally preferably includes two plate-like projections 100 m which are generally centrally disposed relative to sides 110 c and 110 d. The purpose of theseprojections 110 m is to help guide the holdingmember 30 along a generally linear path. In this regard, theprojections 110 m are spaced apart a distance similar toprojections 100 h described with respect toFIG. 7 . Two c-shaped projections 110 g also extend upwardly from the wall of thelower body 110. A connectingrib 110 n serves to connect the projections 110 g to the bottom wall 1101 and sides 110 c and 110 d. These projections 110 g form a lower half of a bearing system for thetrigger 40. Together with the upper projections 100 j (seeFIG. 7 ), i.e., upper half of the bearing system, the parts 100 j and 110 g form two circular bearing supports for thetrigger 40. As will be described later on with regard toFIG. 14 , the journal elements 40 c of thetrigger 40 are mounted to the bearing supports formed by parts 100 j/110 g. Thelower body part 110 additionally includes connecting ribs 110 i and 110 k that provides strength to thelower body part 110. In order to allow the holdingmember 30 move freely within the lancet device and without being obstructed by the ribs 110 i and 110 k, circular or curved recesses (seeFIG. 8D ) are formed in the center of the ribs 110 i and 110 k. These recesses of the ribs 110 i and 110 k can have a radius of approximately 0.15″. - The
lower body part 110 further preferably includes a rectangular shapedprojection 110 h that is generally centrally disposed relative to sides 110 c and 110 d. The purpose of thisprojection 110 h is to guide the holdingmember 30 within the lancet device and to serve as stops for springs S1 and S2. Theprojection 110 h has a polygonal (i.e., four sided) shaped outer surface. A left side surface of theprojection 110 h serves a contact surface for spring S2 (see e.g.,FIG. 1 .). A right side surface of theprojection 110 h serves a contact surface for spring S1 (see e.g.,FIG. 1 ). Theprojection 110 h also has an inner recess that includes an inner tapered or conical portion and a rounded bottom end. This is so mainly for ease of manufacture and to reduce material costs. As can be seen fromFIG. 1 , the length of theprojection 110 h should not be so great so as to contact thecam disk 60. However, it should be of sufficient length so as to project through and slightly beyond the holdingmember 30. - The
lower body part 110 preferably further includes two tapered orconical projections 110 j that are generally arranged off-center relative to sides 110 c and 110 d. The purpose of these projections 110 i is to frictionally engage thecam disk 60. Eachprojection 110 j has a small rounded projection centrally disposed at an upper end. These rounded projections engagerounded indentations 60 h of the cam disk 60 (seeFIG. 16B ) when thecam disk 60 is in a particular position. - The
lower body part 110 also preferably includes circular or curvedindented side portions 110 e and 110 f. Theserecesses 110 e and 110 f may have a radius of approximately 0.66″. As described previously, these recessed portions allow a user to access thecam disk 60. That way, the user can use a finger to rotate thecam disk 60 from either side 110 c or side 110 d. As seen inFIG. 8D , the sides 110 c and 110 d can be curved outwardly (i.e., convex) and have a radius of approximately 0.6″. The sides 110 c and 110 d can also be curved outwardly in the length direction (i.e., seeFIG. 8A ) and have a radius of approximately 16.8″. Therear edge 110 b of thelower body part 110 is preferably a continuous straight edge that is configured to make contact withshoulder 80 p of back cap 80 (seeFIG. 10 ). - FIGS. 9A-F show top cross-section, top, side cross-section, side and partial front views of the
front cover 20. Thefront cover 20 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. Thefront cover 20 may also have be made of ABS—Light Blue and have a finish designated as SPI-A2. Additionally, thefront cover 20 may have an overall length that is approximately 2″ (i.e., between edges 20 j and 20 e). This will ensure that the assembled lancet device can have an overall length of approximately 4.1″. Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, thefront cover 20 may even be made of a plurality of sections of parts which are joined together to form the completefront cover 20, without leaving the scope of the invention. - The
front cover 20 preferably has a front wall 20 e that includes a circular and/or curved indentation 20 f (i.e., defining plane P) and a centrally disposed through opening 20 g (i.e., defining lancet opening LO). The radius of this indentation 20 f may be approximately 1.1″ and the diameter of the through opening 20 g may be approximately 0.26″. Of course, the invention also contemplates a plane P which is straight or which curves outwardly (not shown). As was described previously, the left edges ofwalls 20 a, 20 b, 20 c and 20 d are configured to slide over front edges 100 a and 110 a until contact occurs between circular and/orcurved edges 20 h and shoulders 100 a 1 and 110 a 1. A continuous indentation 20 i is disposed within thefront cap 20. This indentation 20 i may have a radius of approximately 0.02″ and a depth of approximately 0.009″. As explained previously, this indentation 20 i is configured to receive or otherwise engage with the continuous projections 100 a 2 and 110 a 2 (seeFIGS. 7A and 8C ). Of course, the recess 20 i need not be continuous, i.e., it does not have to extend continuous. It can instead be formed as intermitted recesses or it may have the form of a single short recess on at least two opposite sides and that are centrally arranged with respect towalls 20 a-20 d. The side walls 20 a and 20 b also have rearward extending profiled walls 20 j. These have a profiled edge that generally corresponds to the profiled side walls ofbody portions 100 and 110 (seeFIG. 6B ). - Side wall 20 a is preferably tapered inwardly from
edge 20 h to surface 20 e and formes a rounded corner (e.g., with a radius of approximately 0.1″) where wall 20 a meets wall 20 e. This wall 20 a can be curved along its length (seeFIG. 9B ), having a radius of approximately 33.5″, may also be curved outwardly (i.e., convex, seeFIG. 9E ) and may be formed by two curved surfaces. One curved surface may have a radius of approximately 1″ and may extend from wall 20 c towardswall 20 d. Another curved surface may have a radius of approximately 1″ and may extend fromwall 20 d towards wall 20 c. These two surfaces may meet generally at the center of wall 20 a. Side wall 20 b is tapered inwardly fromedge 20 h to surface 20 e and formed a rounded corner (e.g., with a radius of approximately 0.1″) where wall 20 b meets wall 20 e. This wall 20 b can be curved along its length (seeFIG. 9B ), having a radius of approximately 33.5″, may also be curve outwardly (i.e., convex, seeFIG. 9E ) and may be formed by two curved surfaces. One curved surface may have a radius of approximately 1″ and may extend from wall 20 c towardswall 20 d. Another curved surface may have a radius of approximately 1 and may extend fromwall 20 d towards wall 20 c. These two surfaces may meet generally at the center of wall 20 b. Side wall 20 c is tapered inwardly fromedge 20 h to surface 20 e and formed a rounded corner (e.g., with a radius of approximately 0.1″) where wall 20 c meets wall 20 e. This wall 20 c can be curved along its length (seeFIG. 9D ), having a radius of approximately 22″, may also be curved outwardly (i.e., convex, seeFIG. 9E ), may be formed by one curved surface that has a radius of approximately 1.8″ and may extend from wall 20 a towards wall 20 b.Side wall 20 d is tapered inwardly fromedge 20 h to surface 20 e and formed a rounded corner (e.g., with a radius of approximately 0.1″) wherewall 20 d meets wall 20 e. Thiswall 20 d can be curved along its length (seeFIG. 9D ), having a radius of approximately 62″ and may also be curved outwardly (i.e., convex, seeFIG. 9E ), may be formed by one curved surface that has a radius of approximately 1.9″ and may extend from wall 20 a towards wall 20 b. The inner surface of wall 20 e can be planar (seeFIG. 9A ). - FIGS. 10A-F show rear, side, side cross-section, top, and top cross-section views of the
back cap 80. Theback cap 80 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. Theback cap 80 may also have be made of ABS—Light Blue and have a finish designated as SPI-A2. Additionally, theback cap 80 may have an overall length that is approximately 0.87″ (i.e., between ends 80 k and 80 a). This will ensure that the assembled lancet device can have an overall length of approximately 4.1″. Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, theback cap 80 may even be made of a plurality of sections of parts which are joined together to form thecomplete back cap 80, without leaving the scope of the invention. - The
back cap 80 preferably has arear wall 80 k that has a planar outer surface and a planar inner surface 80 n. Theback cap 80 has anopening 801 that extends from surface 80 n to edge 80 a. Thisopening 801 tapers outwardly towards edge 80 a at an angle of approximately 0.5 degrees (per side). The width of the rectangular surface 80 n (measured up and down inFIG. 10C ) may be approximately 0.46″ while the width of the surface 80 n (measured up and down inFIG. 10F ) may be approximately 0.49″. As was described previously, the walls 80 b-80 e are configured to slide intorear edges shoulder 80 p and edges 100 b and 110 b. Acontinuous indentation 80 m is disposed within theback cap 80. Thisindentation 80 m may have a radius of approximately 0.007″ and a depth of approximately 0.004″. As will be explained later on with regard toFIG. 11 , thisindentation 80 m is configured to receive or otherwise engage with thecontinuous projection 70 h (seeFIGS. 11A and 11C ) ofinner sleeve 70. Of course, therecess 80 m need not be continuous, i.e., it does not have to extend continuous. It can instead be formed with intermitted recesses or it may have the form of a single short recess on at least two opposite sides and that are centrally arranged with respect to walls 80 b-80 e. Alternatively, the inner sleeve can have the recess while theback cap 80 has the projection. Of course, other connecting mechanisms, whether conventional or otherwise, may also be utilized in place of the projection and recess connection. - The side walls 80 b-80 e also preferably taper slightly from
shoulder 80 p to edge 80 a by approximately 0.5 degrees (per side). The width of the rectangular edge at the bottom of theshoulder 80 p (measured up and down inFIG. 10C ) may be approximately 0.51″ while the width of this edge (measured up and down inFIG. 10F ) may be approximately 0.54″. The width of the rectangular edge at the top of theshoulder 80 p (measured up and down inFIG. 10C ) may be approximately 0.6″ while the width of this edge (measured up and down inFIG. 10F ) may be approximately 0.61″.Side walls shoulder 80 p to surface 80 k. The approximately square shapedsurface 80 k has a length and width of approximately 0.5∝. However, thewalls wall 80 h may have a radius of approximately 108.3″ (measured in the direction of the length shown inFIG. 10B ) and may be outwardly curved with a radius of approximately 1″ (seeFIG. 10A ). Wall 80 i may have a radius of approximately 31″ (measured in the direction of the length shown inFIG. 10B ) and may be outwardly curved with a radius of approximately 1″ (seeFIG. 10A ).Wall 80 f may have a radius of approximately 16.7″ (measured in the direction of the length shown inFIG. 10E ) and may be outwardly curved by being formed by two curved surfaces each having a radius of approximately 0.5″ and each extending fromsides 80 h and 80 i (seeFIG. 10A ).Wall 80 g may have a radius of approximately 16.7″ (measured in the direction of the length shown inFIG. 10E ) and may be outwardly curved by being formed by two curved surfaces each having a radius of approximately 0.5″ and each extending fromsides 80 h and 80 i (seeFIG. 10A ). -
Side walls 80 h and 80 i also each preferably include twoelongated projections 80 j which extend outwardly therefrom. Theseprojections 80 j preferably have rounded ends and rounded edges. The purpose of theseprojections 80 j is, of course, to ensure that a user can grip theback cap 80 when the lancet device is to be placed into the loaded position (seeFIGS. 1 and 5 ). Of course, any desired gripping system can be utilized in place of thetabs 80 j, such as, e.g., a knurl, a textured or a high friction surface. - FIGS. 11A-E show top, rear and side cross-section views of the
inner sleeve 70. Theinner sleeve 70 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. Theinner sleeve 70 may also have be made of ABS—Light Blue and have a finish designated as SPI-C1. Additionally, theinner sleeve 70 may have an overall length that is approximately 0.47″ (i.e., between edges 70 a and 70 b). This will ensure that the assembled lancet device can have an overall length of approximately 4.1″. Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, theinner sleeve 70 may even be made of a plurality of sections of parts which are joined together to form the completeinner sleeve 70, without leaving the scope of the invention. - The
inner sleeve 70 has a front wall 70 a that has a planar outer surface and a planar inner surface 70 p. An opening 70 i is provided in the wall 70 a. This opening has a circular central part and four generally polygonal recesses 70 j-70 m. Recess 70 j is approximately 0.05″ wide and has a bottom surface that can be arranged approximately 0.15″ from a center axis of the opening 70 i. It is oriented at approximately 45 degrees to the horizontal. Recess 70 k is arranged opposite (i.e., by 180 degrees) recess 70 j and is also approximately 0.05″ wide. This recess 70 k has a bottom surface that can be arranged approximately 0.15″ from a center axis of the opening 70 i. Recess 701 is arranged offset (i.e., by approximately 45 degrees) from recess 70 j and is approximately 0.07″ wide. This recess 701 has a bottom surface that can be arranged approximately 0.18″ from a center axis of the opening 70 i. Recess 70 m is arranged offset (i.e., by approximately 45 degrees) from recess 701 and is approximately 0.07″ wide. This recess 70 m has a bottom surface that can be arranged approximately 0.18″ from a center axis of the opening 70 i. As will be explained later on with regard toFIG. 15 , the recesses 70 j and 70 k are sized and configured to receiveprojections 30 g and 30 h. This allows theinner sleeve 70 to slide over the holdingmember 30 when the lancet device is assembled. Then, theinner sleeve 70 can be rotated by approximately 45 degrees to the assembled position shown in, e.g.,FIG. 1 . - Opening 70 n preferably tapers outwardly from surface 70 p towards edge 70 b at an angle of approximately 0.5 degrees (per side). The width of the rectangular inner surface 70 p (measured up and down in
FIG. 11E ) may be approximately 0.40″ while the width of the same surface (measured up and down inFIG. 11A ) may be approximately 0.43″. Thewalls opening 801 until shoulder 70 g contacts edge 80 a ofback cap 80 and untilprojection 70 h engagesrecess 80 m ofback cap 80. Theprojection 70 h is a continuous projection and may have a radius of approximately 0.007″ and may extend inwardly approximately 0.004″. As was explained with regard toFIG. 10 , thisprojection 70 h is configured to fit into or otherwise engage with thecontinuous recess 80 m of back cap 80 (seeFIGS. 10C and 10D ). Of course, theprojection 70 h need not be continuous, i.e., it does not have to extend continuously. It can instead be formed with intermitted projections or it may have the form of a single short projection on at least two opposite sides and that are centrally arranged with respect to walls 70 c-70 f. Of course, other connecting mechanisms, whether conventional or otherwise, may also be utilized in place of the projection and recess connection. - The side walls 70 c-70 f also preferably taper slightly from shoulder 70 g to edge 70 b by approximately 0.5 degrees (per side). The width of the rectangular edge at the bottom of the shoulder 70 g (measured up and down in
FIG. 11A ) may be approximately 0.49″ while the width of this edge (measured up and down inFIG. 1E ) may be approximately 0.46″. The distance between the shoulder 70 g (measured acrossFIG. 11A ) to surface 70 a may be approximately 0.04″.Side walls FIG. 11D ). In this regard, wall 70 c may have a radius of approximately 0.95″ (measured in the direction ofFIG. 1I D).Wall 70 d may have a radius of approximately 0.9″ (measured in the direction ofFIG. 11D ).Wall 70 e may have a radius of approximately 0.43″ (measured in the direction ofFIG. 11D ). Wall 70 f may have a radius of approximately 0.43″ (measured in the direction ofFIG. 11D ). - FIGS. 12A-B show top and side views of the retaining
element 50. The retainingelement 50 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. The retainingelement 50 may also have be made of ABS—Light Blue and have a finish designated as SPI-C1. Additionally, the retainingelement 50 may have an overall length that is approximately 0.13″ (i.e., betweenedges 50 e and 50 c). Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, the retainingelement 50 may even be made of a plurality of sections of parts which are joined together to form thecomplete retaining element 50, without leaving the scope of the invention. - The retaining
element 50 preferably has a front planar wall 50 d and a rear planar wall 50 c. A centrally disposedprojection 50 b extends from surface 50 d. Theprojection 50 b tapers inwardly from surface 50 d to end 50 e. The distance betweenend 50 e to surface 50 d can be approximately 0.8″. The diameter of theprojection 50 b can be approximately 0.67″ at surface 50 d and can taper towardsend 50 e by approximately 1″ (per side). The diameter ofsurface 50 a can be approximately 0.25″ and may similarly be tapered from side 50 c to side 50 d by approximately 1 degree (per side).End 50 e can also have a chamfer that is approximately 0.02″×0.02″. - FIGS. 13A-B show side and front views of the
end plug 90. The end plug 90 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., Delrin plastic. The end plug 90 may also have be made of Delrin—Natural and have a finish designated as SPI-C1. Additionally, theend plug 90 may have an overall length that is approximately 0.16″ (i.e., between edges 90 b and 90 a). Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, theend plug 90 may even be made of a plurality of sections of parts which are joined together to form thecomplete end plug 90, without leaving the scope of the invention. - The end plug 90 preferably has a rear planar wall 90 b and a front planar wall 90 a. A shoulder 90 i is arranged between surfaces 90 b and 90 e. The diameter of cylindrical surface 90 c can be approximately 0.37″. The diameter of cylindrical surface 90 d can be approximately 0.31″. An offset projection 90 f extends from surface 90 e to end 90 a. The distance between end 90 a and surface 90 e can be approximately 0.06″. The distance between end 90 e and surface 90 i can be approximately 0.06″. The distance between end 90 b and surface 90 i can be approximately 0.04″. The diameter of the projection 90 f can be approximately 0.21″. The center of projection 90 f can be offset from the center of diameter 90 c by approximately 0.024″. Projection 70 f also includes a rounded continuous projection 90 g which is sized to fit into a
recess 30 k of the holdingmember 30. The projection 90 g may have a radius of 0.007″ and may extend from surface 90 f by approximately 0.004″. End 90 a can also have a chamfer that is approximately 0.015″×0.015″. - FIGS. 14A-C show top, side and front views of the
trigger 40. Thetrigger 40 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. Thetrigger 40 may also have be made of ABS —Red and have a finish designated as SPI-A2. Additionally, thetrigger 40 may have an overall length that is approximately 0.9″ (i.e., between edges 40 j and 40 i). Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, thetrigger 40 may even be made of a plurality of sections of parts which are joined together to form thecomplete trigger 40, without leaving the scope of the invention. - The
trigger 40 preferably has a end 40 j that includes a rounded projection 40 e. This rounded projection 40 e is configured to contact an inner surface of upper body part 100 (seeFIG. 1 ) and serves to brace or counter the movement of thetrigger 40 when thetrigger 40 is pressed into the lancet device. The projection 40 e may have a radius of approximately 0.03″. Thetrigger 40 also has end 40 i that includes a rounded projection 40 g. This rounded projection 40 g is configured to contactsurface 30 c 3 of deflectingmember 30 c of the holding member 30 (see FIG. 15) upon movement of thetrigger 40, when thetrigger 40 is pressed into the lancet device. The projection 40 g may have a radius of approximately 0.03″. Thetrigger 40 also includes a connecting member 40 f which connects the push button 40 a to the support 40 d. Two shaft members or journals 40 c project from opposite sides of the support 40 d. The journals 40 c may have a diameter of approximately 0.06″ and may project approximately 0.16″ from support 40 d. These journals 40 c also have rounded ends whose radius can be approximately 0.03″. As explained previously, these journals 40 c are configured to be mounted in the bearing supports formed by parts 100 j and 110 g. In this regard, the openings formed by these parts 100 j and 110 g should be sized to be the same or slightly larger than the diameter of journals 40 c. In this way, the journals 40 c can fit snugly in the supports 100 j/l10 g. The width (measured in the direction ofFIG. 14A ) of the support 40 d may be approximately 0.1″. - The push button 40 a preferably has a tear-drop shape and includes a inwardly curved (i.e., concave) surface 40 h that has a radius of approximately 0.86″. Two lip members 40 b project from opposite sides of the push button 40 a. These lip members are approximately 0.04″ wide and may extend from the sides of the push button by approximately 0.03″. The thickness of the lip members 40 b (measured in the direction of
FIG. 14C ) can be approximately 0.02″. These lip members 40 b limit the upward movement of the push button 40 a by contacting an inner surface of theupper body 100 when thetrigger 40 is in the original non-deflected position (see e.g.,FIG. 1 ). The push button 40 a can have a curved front edge 40 k whose radius can be approximately 0.17″ and a curved rear edge 401 whose radius can be approximately 0.045″. The distance between end 40 j and right side surface of connecting element 40 f can be approximately 0.42″ while the distance between end 40 i and right side surface of connecting element 40 f can be approximately 0.4″. Finally, the curved surface 40 h can also include a texture (not shown) to prevent a user's finger from slipping off of the button 40 a. - As explained above with regard to
FIG. 1 , thetrigger 40 is designed to preferably deflect inwardly when a user pushes against the push button 40 a (seeFIG. 2 ) and to return to an original position (seeFIG. 1 or 3). In this regard, the deflection occurs in the area between journals 40 c and connecting element 40 f and/or possibly somewhat between projection 40 e and journals 40 c. The design is such that the material properties of thetrigger 40 allows it to act like a natural spring. - FIGS. 15A-E show top, side cross-section and front views of the holding
member 30. The holdingmember 30 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g.; Delrin plastic. The holdingmember 30 may also have be made of Delrin—Natural and have a finish designated as SPI-C1. Additionally, the holdingmember 30 may have an overall length that is approximately 2.8″ (i.e., betweenedges 30 a and 30 d). Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, the holdingmember 30 may even be made of a plurality of sections of parts which are joined together to form the complete holdingmember 30, without leaving the scope of the invention. - The holding
member 30 preferably has a front end 30 a that includes a cylindrical section 30 b which may have a diameter of approximately 0.3″. Anopening 301 is arranged within the cylindrical section 30 b. Theopening 301 extends from a wall surface 30 m to edge 30 a. The diameter of theopening 301 at the edge 30 a may be approximately 0.26″ and may taper slightly, e.g., by approximately 0.5 degrees (per side), towards surface 30 m. Thistapered opening 301 is sized and configured to securely retain and receive the lancet 10 (see e.g.,FIG. 1 ) which may be a conventional lancet. The holdingmember 30 also includes another cylindrical section 30 e which may have a diameter of approximately 0.25″. Cylindrical section 30 e also has an internal opening 30 p that extends fromedge 30 d to wall surface 30 n. The opening 30 p is sized and configured to receive springs S1 and S2 (see e.g.,FIG. 1 ). The distance between surface 30 n and edge 30 d can be approximately 2.3″. An elongated through slot 30 f is arranged on the cylindrical section 30 e. As discussed above, this slot 30 f is sized and configured to receiveprojection 110 h of thelower body part 110. In this regard, the width of the slot 30 f can be approximately ⅛″ while the length of the slot 30 f can be approximately 0.825″. The slot 30 f also has rounded ends whose radius can be approximately {fraction (1/16)}″. - A deflecting
member 30 c preferably extends from cylindrical section 30 e. This deflecting member has afirst stop surface 30c 1 which is configured to abut shoulder 100 i of theupper body part 100 and a second stop surface formed on alimit projection 30 c 2. Atrigger engaging surface 30 c 3 is arranged an upper portion of the deflectingmember 30 c. Thissurface 30 c 3 is configured to be engaged by projection 40 g of thetrigger 40. As explained above, the deflectingmember 30 c is capable of deflecting inwards towards the holdingmember 30 whensurface 30 c 3 is forced towards holdingmember 30. However, because the deflectingmember 30 c acts like a natural spring, the deflectingmember 30 c is capable of deflecting away from the holdingmember 30 whensurface 30 c 3 is not being forced towards holdingmember 30. The length of the deflectingmember 30 c betweensurface 30 c 1 and where themember 30 extends from the wall 30 e is approximately 0.43″. In the area where the deflectingmember 30 c is coupled to the wall 30 e, the deflectingmember 30 is spaced from wall by about 0.08″. The deflectingmember 30 also has a width (measured in the direction ofFIG. 15C ) of approximately 0.08″. -
End 30 d of the holdingmember 30 preferably includes threeprojections 30 g, 30 h and 30 j.Projections 30 g and 30 h extend in the direction of the axis of the holdingmember 30 and are arranged opposite one another, i.e., 180 degrees apart. Theseprojections 30 g and 30 h have a length of approximately 0.21″ and a width of approximately 0.05″.Projections 30 g and 30 h also have stop surfaces 30g h 1. These surfaces 30g h 1 are adapted to be engaged and/or contacted by surface 70 p of theinner sleeve 70 when theback cap 80 is moved backwards to load the lancet device (seeFIG. 5 ). Projection 30 j includes a stop shoulder or surface 30 i. As explained previously, the stop surface 30 i engages and/or contacts the various cam surfaces 60 e 1-60e 8 of thecam disk 60. Thus, the stop surface 30 i serves to adjust the depth of the lancet needle based upon the position of thecam disk 60, as will be described later on. As explained previously, the projection 30 j is configured to slide within the recess 701 of theinner sleeve 70 when theback cap 80 is moved from the positions shown inFIGS. 1 and 5 . - Opening 30 p, in the area of the
end 30 d, preferably includes a tapered portion that extends fromedge 30 d inwardly by approximately 0.5 degrees (per side). A continuous recess orindentation 30 k is sized and configured to receive a projection 90 g of theend plug 90. In this regard, therecess 30 k may have a radius of approximately 0.007″ and a depth of approximately 0.004″. As can be seen inFIG. 1 , diameter 90 f of theend plug 90 is configured to slide into opening 30 p ofend 30 d. Once the projection 90 g engagesrecess 30 k, theend plug 90 is secured to the holdingmember 30. As explained previously, surface 90 a of theend plug 90 serves to engage or contact one end of spring S2. The end plug 90 is installed once springs S1 and S2 are arranged within the opening 30 p, and after spring S3 is slid overend 30 d. - FIGS. 16A-D show top, bottom and side cross-section views of the
cam disk 60. Thecam disk 60 can preferably be made as one-piece structure by e.g., injection molding. In this regard, it is preferably made of a plastic or synthetic resin such as, e.g., ABS plastic. Thecam disk 60 may also have be made of ABS—Dark Blue and have a finish designated as MT-11040. Additionally, thecam disk 60 may have an overall diameter that is approximately 0.78″. Of course, other materials and/or finishes may be utilized, without leaving the scope of the invention. Moreover, thecam disk 60 may even be made of a plurality of sections of parts which are joined together to form thecomplete cam disk 60, without leaving the scope of the invention. - The
cam disk 60 preferably has a top surface 60 g that includes indicia 60 i which may be numbers or letters. Of course, any desired indicia may be utilized. This indicia 60 i can be, e.g., pad printed or silk screen raised numbers in white ink. The height of the indicia can be approximately 0.09″. A centrally disposed opening 60 b extends through thecam disk 60. The opening 60 b may have a diameter of approximately ⅛″. As explained previously, the opening 60 b is sized and configured to slide overprojection 1001 of theupper body part 100. Thecam disk 60 also includes an enlarged diameter opening that is defined by shoulder 60 f. The diameter of the shoulder can be approximately 0.25″. The purpose of this shoulder 60 f is to receivesurface 50 a of the retaining member 50 (see e.g.,FIG. 1 ). Thecam disk 60 includes a plurality of cam surfaces 60 e 1-60e 8 formed on a cam section 60 e. As can be seen inFIG. 16C , the cam surfaces 60 e 1-60e 8 are all spaced from a center axis of thecam disk 60 by different amounts. As was explained previously, these surfaces are configured to be contacted by stop surface 30 i of the holdingmember 30. Thus, for example, when contact is made between stop surface 30 i and surface 60e 1, the lancet needle will penetrate to its deepest setting. On the other hand, when contact is made between stop surface 30 i and surface 60e 8, the lancet needle will penetrate to its shallowest setting. Of course, surfaces 60 e 2-60 e 7 will set the penetrating depth in between these extreme settings. Although, thecam disk 60 is configured with eight settings (designated by the number of cam surfaces and the indicia), thecam disk 60 can have any number of desired settings that can range from two to as many as 20 or more, if desired. - In this regard, the distance between surface 60
e 8 and the center axis ofcam disk 60 can be approximately 0.16″, the distance between surface 60 e 7 and the axis ofcam disk 60 can be approximately 0.169″, the distance between surface 60e 6 and the axis ofcam disk 60 can be approximately 0.178″, the distance between surface 60e 5 and the axis ofcam disk 60 can be approximately 0.187″, the distance between surface 60 e 4 and the axis ofcam disk 60 can be approximately 0.196″, the distance between surface 60 e 3 and the axis ofcam disk 60 can be approximately 0.205″, the distance between surface 60 e 2 and the axis ofcam disk 60 can be approximately 0.214″, and the distance between surface 60e 1 and the axis ofcam disk 60 can be approximately 0.223″. The surfaces 60 e 1-60e 8 are separated by rounded projections which may have a radius of approximately 0.04″. The width of the surfaces 60 e 1-60e 8 can be approximately 0.08″. The thickness of thecam section 60 can be approximately 0.05″ measured from surface 60 c and 60 d while the thickness of the indicia section can be approximately 0.08″ measured from surface 60 g and surface 60 c. Finally, thecam disk 60 preferably includes twoindentations 60 h which are sized and configured to receive rounded tips of the two projections 10 j of the lower body part. These recesses can have depth of approximately 0.033″ and a rounded bottom whose radius is approximately 0.02″, and they may be spaced apart by approximately ⅝″. Thecam disk 60 may also include a knurl, a high-friction surface, or other desired texturing (e.g., projections and recesses) along its peripheral edge (not shown). - All the parts of the lancet device, with the exception of the springs S1-S3 (which can be made of spring steel) and with the exception of the lancet needle (which can be a conventional metal needle mounted to a conventional plastic lancet 10), may be made from plastic materials and can be formed using conventional injection molding techniques or other known manufacturing methods. The cam disk for example can be integrally formed with peripheral grooves and/or projections (similar to a coin), and with the indicating marks. However, when practical, other materials and manufacturing processes may also be utilized.
- It is noted that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present invention. While the present invention has been described with reference to an exemplary embodiment, it is understood that the words which have been used herein are words of description and illustration, rather than words of limitation. Changes may be made, within the purview of the appended claims, as presently stated and as amended, without departing from the scope and spirit of the present invention in its aspects. Although the present invention has been described herein with reference to particular means, materials and embodiments, the present invention is not intended to be limited to the particulars disclosed herein; rather, the present invention extends to all functionally equivalent structures, methods and uses, such as are within the scope of the appended claims.
Claims (44)
Priority Applications (6)
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US10/641,101 US7105006B2 (en) | 2003-08-15 | 2003-08-15 | Adjustable lancet device and method |
CNB2004800303691A CN100450451C (en) | 2003-08-15 | 2004-08-13 | Adjustable lancet device and method |
PCT/US2004/026060 WO2005018421A2 (en) | 2003-08-15 | 2004-08-13 | Adjustable lancet device and method |
CA002535785A CA2535785A1 (en) | 2003-08-15 | 2004-08-13 | Adjustable lancet device and method |
AU2004266638A AU2004266638A1 (en) | 2003-08-15 | 2004-08-13 | Adjustable lancet device and method |
EP04780835A EP1663022A4 (en) | 2003-08-15 | 2004-08-13 | Adjustable lancet device and method |
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US10/641,101 US7105006B2 (en) | 2003-08-15 | 2003-08-15 | Adjustable lancet device and method |
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US20050038464A1 true US20050038464A1 (en) | 2005-02-17 |
US20050267505A9 US20050267505A9 (en) | 2005-12-01 |
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Also Published As
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CN100450451C (en) | 2009-01-14 |
AU2004266638A1 (en) | 2005-03-03 |
CA2535785A1 (en) | 2005-03-03 |
CN1867296A (en) | 2006-11-22 |
WO2005018421A3 (en) | 2005-09-15 |
WO2005018421A2 (en) | 2005-03-03 |
US7105006B2 (en) | 2006-09-12 |
EP1663022A2 (en) | 2006-06-07 |
US20050267505A9 (en) | 2005-12-01 |
EP1663022A4 (en) | 2009-03-04 |
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