Rebound type injector with shielding needle eccentric blocking piece

Abstract

A rebound type injector with a shielding needle eccentric separation piece comprises: a protective cover, wherein a needle through hole is arranged in the protective cover; a large needle base, wherein the front end of the large needle base is connected with the protective cover, and an elastic buckle body is arranged at the front part in the large needle base; the eccentric blocking piece arranged in the protective cover and provided with an eccentric hole and a blind hole; a needle cylinder, wherein the front end of the needle cylinder is connected with the large needle base, and an annularbarb is arranged on the inner wall of the front end of the needle cylinder; a buffer bracket mounted at the rear part in the large needle base; a small needle base, wherein the front part of the smallneedle base is buckled and matched with the elastic buckle body of the large needle base, and the outer wall of the rear part is provided with an annular boss; a needle tube, wherein the needle tip of the needle tube penetrates through the eccentric hole of the eccentric blocking piece and the needle through hole of the protective cover and then is exposed, and the rear end of the needle tube isfixed in the small needle base; a spring, wherein two ends of the spring abut against the inner side of the buffer bracket and the annular boss of the small needle base respectively; a core rod; a core rod head connected with the front end of the core rod, wherein and the front end surface of the core rod head is matched with the rear end surface of the buffer bracket; a piston sleeving the core rod head; and a buffer rubber plug arranged in the front end of the core rod head. The rebound type injector has the advantagesof compact structure, convenience in self-destruction operation, and safety improvement.

Description

technical field [0001] The invention belongs to the technical field of syringes, and in particular relates to a rebound type syringe with an eccentric shield for a shielding needle. Background technique [0002] Most of the existing rebound-type syringes use the needle tube retracting mechanism to drive the needle tube back into the cannula to realize self-destruction, but the needle point of the retracted needle tube may protrude out of the cannula again, which poses a safety hazard. At the same time, it is necessary to design a needle tube retraction mechanism that is easier to self-destruct, so as to improve the convenience and reliability of the rebound syringe product. Contents of the invention [0003] The present invention aims at the above problems and provides a rebound type syringe with an eccentric shielding plate for the shielding needle. [0004] The purpose of the present invention can be achieved through the following technical solutions: a rebound type syr...

AI Technical Summary

Problems solved by technology

[0002] Most of the existing rebound syringes use the needle tube retracting mechanism to drive the needle tube back into the cannula to achieve self-destruction, but the needle tip of the retracted needle tube may protrude out of the cannula again, which poses a safety hazard

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