Lancet
First Claim
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1. A lancet assembly comprising,(a) an elongated housing;
- (b) a passage extending through said housing with a lancet opening at one end thereof;
(c) an elongated lancet body reciprocable in said passage;
(d) a lancet blade positioned in said lancet body at one end thereof;
(e) actuation means on said lancet body at the end thereof opposite said lancet blade;
the improvement characterized by(f) a plurality of spaced apart first integral abutment means on said housing and extending into said passage;
(g) a plurality of spaced apart second integral abutment means on said lancet body for cooperating with said first abutment means;
(h) resilient means extending between said lancet body and said housing;
(i) whereby pushing said actuation means causes said lancet body to move through said passage in a first direction causing one of said second abutment means to move past one of said first abutment means causing a snap-action in a puncture direction and in turn causing said lancet blade to move through said lance opening;
(j) said first movement compressing said resilient means and damping said snap-action;
(k) said first movement stopped by cooperation of said actuation means with said housing; and
(l) release of said actuation means causing relaxation of said resilient means and movement of said lancet body in said passage in a non-puncture direction until engagement of one of said second abutment means with one of said first abutment means for maintaining said lance blade within said housing in a non-contaminating position.
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Accused Products
Abstract
A disposable lancet assembly is provided, including a housing serving as a lancet-holder guide, a lancet holder body reciprocable in the housing guide, and a flat-bladed lancet mounted in one end of the lancet holder body. Included in the invention are integral strategically positioned abutments which serve dual functions providing snap-action drive for the lancet, together with steps for lancet movement control. The simple coil spring provides damping of the lancet drive in the puncture direction with automatic withdrawal of the lancet into the housing.
200 Citations
7 Claims
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1. A lancet assembly comprising,
(a) an elongated housing; -
(b) a passage extending through said housing with a lancet opening at one end thereof; (c) an elongated lancet body reciprocable in said passage; (d) a lancet blade positioned in said lancet body at one end thereof; (e) actuation means on said lancet body at the end thereof opposite said lancet blade; the improvement characterized by (f) a plurality of spaced apart first integral abutment means on said housing and extending into said passage; (g) a plurality of spaced apart second integral abutment means on said lancet body for cooperating with said first abutment means; (h) resilient means extending between said lancet body and said housing; (i) whereby pushing said actuation means causes said lancet body to move through said passage in a first direction causing one of said second abutment means to move past one of said first abutment means causing a snap-action in a puncture direction and in turn causing said lancet blade to move through said lance opening; (j) said first movement compressing said resilient means and damping said snap-action; (k) said first movement stopped by cooperation of said actuation means with said housing; and (l) release of said actuation means causing relaxation of said resilient means and movement of said lancet body in said passage in a non-puncture direction until engagement of one of said second abutment means with one of said first abutment means for maintaining said lance blade within said housing in a non-contaminating position. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification