Single Puncture Lancing Fixture with Depth Adjustment and Control of Contact Force
First Claim
1. A lancing mechanism fixture for puncturing skin comprising:
- a lancet disposed on the fixture having a penetration end being adapted to puncture skin, the penetration end being moveable in a direction substantially parallel to a longitudinal axis of the lancet, the penetration end of the lancet being moveable from a first position to a second position during a forward stroke, the penetration end of the lancet being movable from the second position back to the first position during a return stroke;
a cam mechanism including a slot cam and a cam follower, the cam follower connected to the lancet, the cam follower engaged to the slot cam such that the longitudinal axis of the slot cam is generally perpendicular to the longitudinal axis of the lancet, the slot cam being moveable along its longitudinal axis to move the cam follower and connected lancet a fixed distance; and
a drive member connected to the slot cam, the drive member adapted to assist in moving the slot cam.
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Accused Products
Abstract
A lancing mechanism fixture for puncturing skin with a lancet having a penetration end being moveable in a direction substantially parallel to the longitudinal axis of the lancet, the penetration end being moveable from a first position to a second position during a forward stroke, the penetration end being movable from the second position back to the first position during a return stroke. The motion of the lancet is controlled by a cam mechanism including a slot cam and a cam follower connected to a lancet. A drive member applies a linear force to the slot cam whose linear motion and slot path shape forces the lancet to move from a first position to a second position and back to the first position.
165 Citations
29 Claims
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1. A lancing mechanism fixture for puncturing skin comprising:
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a lancet disposed on the fixture having a penetration end being adapted to puncture skin, the penetration end being moveable in a direction substantially parallel to a longitudinal axis of the lancet, the penetration end of the lancet being moveable from a first position to a second position during a forward stroke, the penetration end of the lancet being movable from the second position back to the first position during a return stroke; a cam mechanism including a slot cam and a cam follower, the cam follower connected to the lancet, the cam follower engaged to the slot cam such that the longitudinal axis of the slot cam is generally perpendicular to the longitudinal axis of the lancet, the slot cam being moveable along its longitudinal axis to move the cam follower and connected lancet a fixed distance; and a drive member connected to the slot cam, the drive member adapted to assist in moving the slot cam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A lancing mechanism fixture for puncturing skin comprising:
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a lancet disposed on the fixture having a penetration end being adapted to puncture skin, the penetration end being moveable in a direction substantially parallel to a longitudinal axis of the lancet, the penetration end of the lancet being moveable from a first position to a second position during a forward stroke, the penetration end of the lancet being movable from the second position back to the first position during a return stroke; a cam mechanism including a slot cam and a cam follower, the cam follower connected to the lancet, the cam follower engaged to the slot cam such that the longitudinal axis of the slot cam is substantially perpendicular to the longitudinal axis of the lancet, the slot cam being moveable along its longitudinal axis to move the cam follower and connected lancet a fixed distance; a drive member connected to the slot cam, the drive member adapted to assist in moving the slot cam; and an endcap located along the lancet'"'"'s travel axis, the endcap positioning a surface of the skin a distance from the penetration end, the endcap comprising a hole therethrough in which the penetration end passes to puncture the skin surface. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A lancing mechanism fixture for puncturing skin comprising:
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a lancet disposed on the fixture having a penetration end being adapted to puncture skin, the penetration end being moveable in a direction substantially parallel to a longitudinal axis of the lancet, the penetration end of the lancet being moveable from a first position to a second position during a forward stroke, the penetration end of the lancet being movable from the second position back to the first position during a return stroke; a cam mechanism including a slot cam and a cam follower, the cam follower connected to the lancet, the cam follower engaged to the slot cam such that the longitudinal axis of the slot cam is generally perpendicular to the longitudinal axis of the lancet, the slot cam being moveable along its longitudinal axis to move the cam follower and connected lancet a fixed distance; a spring device connected to the slot cam, the spring device adapted to assist in moving the slot cam a fixed distance; an endcap, located along the lancet'"'"'s travel axis positioning the skin surface a distance from the penetration end, the endcap comprising a hole through which the penetration end passes to puncture the skin; a force registering member connected to the endcap that registers the amount of force applied to the endcap, the force registering member activating the drive member when a predetermined amount of force is applied to the endcap; and a penetration end adjustment mechanism and an endcap adjustment mechanism for adjusting the puncture depth of the penetration end of the lancet.
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28. A method for puncturing skin to obtain a blood sample with a lancing mechanism, the lancing mechanism including a slot cam, lancet, endcap, drive member, and trigger, the method comprising the acts of:
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pressing the user'"'"'s skin against the endcap connected to a force registering member; determining the force applied to the endcap; and initiating the drive member if a predetermined amount of force is applied to the endcap, the drive member causing the slot cam to move in a linear direction, the linear movement of the slot cam causing the lancet to move from a first position to a second position and back to the first position, resulting in a single puncture in the user'"'"'s skin. - View Dependent Claims (29)
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Specification