Compact multi-use lancing device
First Claim
Patent Images
1. A lancing device comprising:
- a housing having first and second spring axles and at least one linear guide surface extending between the first and second spring axles;
a lancet holder for holding a lancet and mounted for reciprocal translation along a linear lancing stroke path, the lancing stroke path being defined by the at least one linear guide surface of the housing; and
a drive mechanism comprising a pair of torsion springs for propelling the lancet holder along the linear lancing stroke path, each of the pair of torsion springs having a coil portion carried on one of the first and second spring axles and being positioned laterally offset from the lancing stroke path of the lancet holder.
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Abstract
A multi-use micro-sampling or lancing device (10) having an outer housing (12), a lancet holder (32) that engages a lancet (30) and constrains the lancet along a controlled and predefined path of travel during the lancing stroke, and a drive mechanism with a pair of opposed, off axis torsion springs (80,82) working in tandem to drive and return the lancet holder through its lancing stroke.
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Citations
19 Claims
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1. A lancing device comprising:
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a housing having first and second spring axles and at least one linear guide surface extending between the first and second spring axles; a lancet holder for holding a lancet and mounted for reciprocal translation along a linear lancing stroke path, the lancing stroke path being defined by the at least one linear guide surface of the housing; and a drive mechanism comprising a pair of torsion springs for propelling the lancet holder along the linear lancing stroke path, each of the pair of torsion springs having a coil portion carried on one of the first and second spring axles and being positioned laterally offset from the lancing stroke path of the lancet holder. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A lancing device, comprising:
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a housing defining a linear guide path and having first and second spring axles positioned generally opposite the linear guide path from one another; and a drive mechanism within the housing for driving a lancet along a linear lancing stroke established by the linear guide path, the drive mechanism comprising; a carrier for releasably retaining the lancet; a first torsion spring having a coil portion mounted on the first spring axle for urging the lancet from an initial position into an extended position wherein a portion of the lancet protrudes out of the compact housing; and a second torsion spring having a coil portion mounted on the second spring axle for retracting the lancet back into the housing. - View Dependent Claims (9, 10)
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11. A lancing device, comprising:
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a compact, non-elongated housing having first and second spring axles and defining a linear guide path between the first and second spring axles, said housing further defining a lancet opening aligned with the linear guide path; a drive mechanism for movably supporting a lancet along a lancing stroke constrained by the linear guide path between a retracted position within the housing and an extended position wherein a sharp tip of the lancet extends through the lancet opening, said drive mechanism further comprising a drive spring having a loop portion carried on the first spring axle and a return spring having a loop portion carried on the second spring axle; a trigger for triggering the drive mechanism; and wherein the housing has a length of no more than about four times as long as the length of the lancet used therein. - View Dependent Claims (12, 13, 14)
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15. A lancing device comprising:
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a reciprocating lancet carrier for releasably engaging a replaceable lancet, the lancet carrier traversing a linear path of travel along a forward stroke and a return stroke; and a pair of torsion springs operating in tandem to advance the lancet carrier along the forward stroke, and to retract the lancet carrier along the return stroke, wherein a first one of the pair of torsion springs is mounted laterally offset on a first side of the linear path of travel, and wherein a second one of the pair of torsion springs is mounted laterally offset on a second side of the linear path of travel generally opposite the first side. - View Dependent Claims (16, 17, 18, 19)
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Specification