Lancing device with improved guidance assembly

摘要

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.

主权项

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.