Blood sampling pen of which penetration depth is adjusted at rear portion

Abstract

Provided is a blood sampling pen of which the penetration depth is adjusted at the rear portion. The blood sampling pen comprises a pen cap, a cap base, a shoot rod and a housing and is characterizedin that depth adjustment outer sleeves and depth adjustment middle sleeves are arranged on a blood sampling pen body, the shoot rod is located in the middle sleeves, and the middle sleeves are sleevedwith the outer sleeves; the outer sleeves are rotatably connected relative to the housing in the circumferential direction and connected in a positioning mode in the axial direction at the same time,and a rotary positioning mechanism is arranged between the outer sleeves and the housing; the middle sleeves are connected relative to the housing in the circumferential direction in a positioning mode and slidably connected in the axial direction at the same time, a rotary moving mechanism is arranged between the middle sleeves and the housing, and a passive impact surface is arranged on a positive impact surface, relative to the shoot rod, on the middle sleeves; a manual adjustment ring exposed at the outer side of the rear middle portion of the blood sampling pen body is arranged on the outer sleeves, the manual adjustment ring is rotated to drive the middle sleeves to move in the axial direction, and accordingly the penetration depth of a needle tip is changed. In the blood sampling pen of which the penetration depth is adjusted at the rear portion, a penetration depth adjustment mechanism is separated from the head of the blood sampling pen body and transferred to the rear middleportion of the blood sampling pen body, and the problem that blood sampling needle installation interferes the penetration depth is completely solved.

Description

technical field [0001] The invention relates to a medical blood collection device, in particular to a blood collection pen matched with a disposable blood collection needle. The puncture depth of the lancing pen has the feature of rear adjustment. Background technique [0002] The blood collection pen is a blood collection device used in conjunction with a disposable blood collection needle, wherein the blood collection pen is reusable, and the blood collection needle is only for one-time use in order to avoid cross-infection. The blood collection pen has been developed for decades, and the improvement of the blood collection pen has gone through many stages. At present, the blood collection pen is gradually becoming mature, but in the development process of the blood collection pen, in order to adapt to different ages (such as adults and children) For blood collection objects with different cortical thicknesses, a puncture depth adjustment mechanism is specially designed i...

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a blood collection pen with post-adjustment of the puncture depth, the purpose of which is to solve the problem that the lancet installed in the existing blood collection pen interferes with the puncture depth pointed out in the background art

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