Lancing device with improved guidance assembly
First Claim
Patent Images
1. A guidance mechanism for a lancing device, said guidance mechanism comprising:
- a piston comprising a shaft, a plurality of fins extending from the shaft, a plurality of dovetail-tapered sliding engagement surfaces at the distal ends of the fins, and a lancet holder; and
a chassis comprising an elongate hollow chamber bounded by sidewalls, the sidewalls having guidance channels formed therein with tapered engagement surfaces along the guidance channels;
wherein the piston slides freely within the hollow chamber of the chassis with the fins of the piston received in the guidance channels of the chassis, and with the dovetail-tapered sliding engagement surfaces of the piston aligned with the tapered engagement surfaces of the chassis, and wherein the plurality of fins extend through the channels such that the fins are exposed exteriorly of the chassis.
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Abstract
A guidance mechanism for a lancing device. The guidance mechanism includes a piston having a shaft, a plurality of wings or fins extending from the shaft, a plurality of sliding engagement structures, and a lancet holder; and a chassis having a body, a plurality of longitudinal slits or cutouts, a plurality of elongated engagement structures, and an end aperture. The piston slides within the chassis, and the wings/fins engage within the slits/cutouts, allowing for linear longitudinal guidance of the piston within the chassis.
47 Citations
21 Claims
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1. A guidance mechanism for a lancing device, said guidance mechanism comprising:
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a piston comprising a shaft, a plurality of fins extending from the shaft, a plurality of dovetail-tapered sliding engagement surfaces at the distal ends of the fins, and a lancet holder; and a chassis comprising an elongate hollow chamber bounded by sidewalls, the sidewalls having guidance channels formed therein with tapered engagement surfaces along the guidance channels; wherein the piston slides freely within the hollow chamber of the chassis with the fins of the piston received in the guidance channels of the chassis, and with the dovetail-tapered sliding engagement surfaces of the piston aligned with the tapered engagement surfaces of the chassis, and wherein the plurality of fins extend through the channels such that the fins are exposed exteriorly of the chassis. - View Dependent Claims (2, 3, 4, 5)
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- 6. A lancing device guidance mechanism comprising a housing and a lancet mounted for translation relative to the housing along a linear path of travel, the housing defining a linear slot extending parallel to the lancet'"'"'s linear path of travel and comprising a tapered housing guidance surface along the slot, the lancet having a wing extending therefrom having a dovetail-tapered lancet guidance surface thereon, wherein the wing extends through the slot such that the wing is at least partially exposed along an exterior portion of the housing, and the dovetail-tapered lancet guidance surface slides along the tapered housing guidance surface to constrain the lancet to translational movement along its linear path of travel.
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18. A lancet for use in combination with a lancing device guidance mechanism, the lancing device guidance mechanism including a housing having a linear slot formed therein, a carrier platform, and a spring coupled between the housing and the carrier platform, the lancet comprising:
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a lancet body; a sharp lancet tip projecting in an axial direction from the lancet body; a wing extending from the lancet body in a transverse direction generally perpendicular to the axial direction; a dovetail-tapered lancet guidance surface extending from the wing obliquely to the transverse direction; and a coupling for releasable attachment to the carrier platform; wherein the wing is adapted to extend through the slot such that at least a portion thereof is exposed about an exterior portion of the housing, and position the dovetail-tapered lancet guidance surface in sliding relation along a correspondingly tapered housing guidance surface extending along the slot in the housing. - View Dependent Claims (19, 20, 21)
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Specification