RETRACTABLE LANCET AND RETRACTION MECHANISM FOR USE THEREWITH
First Claim
1. A lancet for use with a lancing device to lance skin, the lancet comprising a lancet needle and a lancet body that holds the needle, wherein the lancet needle has a tip for piercing the skin during a lancing stroke, and wherein the tip of the lancet needle is retractable relative to the lancet body from an extended position projecting from the lancet body to a retracted position where it is shielded by the lancet body after use.
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Accused Products
Abstract
A lancet for use with a lancing device, the lancet including a lancet body and a lancet needle. The lancet needle has a tip for piercing a subject'"'"'s skin, and the tip of the lancet needle is retractable into the lancet body after use to prevent user contact with the now-contaminated tip. The needle retraction may be effected by a retraction mechanism including a control member with a cam surface and a ram surface and a lever with a cam follower and a needle engagement or stop member. As the control member is moved relative to the lancet, the cam follower transcribes the cam surface, which causes the engagement or stop member to retract the lancet.
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Citations
21 Claims
- 1. A lancet for use with a lancing device to lance skin, the lancet comprising a lancet needle and a lancet body that holds the needle, wherein the lancet needle has a tip for piercing the skin during a lancing stroke, and wherein the tip of the lancet needle is retractable relative to the lancet body from an extended position projecting from the lancet body to a retracted position where it is shielded by the lancet body after use.
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9. A retraction mechanism for use with a lancet having a lancet body and a lancet needle that is movable relative to the lancet body to a retracted position, the retraction mechanism comprising:
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a control member having a cam surface, wherein the control member is translationally movable relative to the lancet body; and a cam follower; and a needle engagement member operably coupled to the cam follower, wherein upon translational movement of the control member relative to the lancet body, the cam follower transcribes the cam surface, which manipulates the needle engagement member to engage the lancet needle and apply a force to the lancet to withdraw the needle tip the retracted position. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 20)
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- 19. The retraction mechanism of claim 19, wherein the control member defines a ram surface that is adapted to engage and apply a force to the lancet body when the cam follower transcribes the second flat segment.
Specification