Patent ID: 8740923
Filing Date: 2014-06-03
Classification: A61B

Abstract:
1. A puncture needle cartridge for installation in a puncture device, the puncture needle cartridge comprising: a lancet comprising an elongate lancet body having a puncture needle extending axially from one end of the body, and a portion to be held by a puncture device at the other end of the body, and a puncture needle protection cap for protecting the puncture needle; and a cylindrical puncture needle holder for holding the lancet body so that the lancet is movable axially in the holder, and the outer diameter of the puncture needle holder at its needle exit end is larger than the outer diameter of the puncture needle holder at its opposite end, with four linear grooves in the inner periphery of and parallel to the axial length of the puncture needle holder and evenly angularly spaced about a longitudinal axis of the holder; the lancet body comprises a first pair of convex portions diametrically opposite each other across a longitudinal axis of the lancet body, each of the first pair of convex portions, being slidably engaged with one of the grooves to thereby guide sliding movement of the lancet body, the lancet body further comprising a second pair of convex portions located diametrically opposite each other across the longitudinal axis of the lancet body and spaced axially separately from said first pair of convex portions, and located outside the puncture needle holder.