Automatic retraction type safety injector

Abstract

The invention discloses an automatic retraction type safety injector, which comprises an outer sleeve and a core rod arranged in the outer sleeve, wherein the front part of the outer sleeve is connected with a needle head component provided with a jacket; the needle head component comprises a needle tube, a needle tube base and a needle tube outer base; the front part of the outer sleeve is provided with an external conical locking joint connected with a threaded joint at the rear end part of the needle tube outer base; the outer sleeve is also connected with at least two elastic damping claws which extend forwards to the outside of the outer sleeve; the core rod is a hollow core rod, the front part of the core rod is provided with a bolt plug which extends forwards to the inside of the inner cavity, the core is connected with the bolt plug though through a plastic plug, a slip ring is arranged on the rear end of the bolt plug, a convex ring for blocking the slip ring is arranged on the inner wall of the core rod which is positioned on the rear side of the slip ring, the bolt plug positioned in the inner cavity is provided with a compression spring, and a clamping hollow cavity matched with a clamping cone is formed on the front end of the bolt plug. The automatic retraction type safety injector has a rational structure, is convenient to assemble and use and high in safety and can be directly collected for concentrated treatment after injection without manual operation such as breakage, and thus, the working efficiency of medical stuff is improved.

Description

technical field [0001] The invention relates to a medical device, in particular to an automatic retractable safety syringe. Background technique [0002] Syringes are the most commonly used and most used medical devices, mainly used for injecting liquid medicine or testing blood and so on. In recent years, in order to avoid repeated use and cross-infection, the use of disposable sterile syringes has been promoted. However, the existing disposable sterile syringes remain intact after use and can be reused, which provides opportunities for some criminals to take advantage of them, brings the hidden danger of cross-infection, and easily causes disease transmission. In addition, during the subsequent processing of the syringe after injection, because the needle is exposed, it is easy to scratch the skin, causing new cross-infection, and the recycling process is cumbersome. [0003] The Chinese patent application with the application number 200810014624.3 discloses a self-retr...

AI Technical Summary

Problems solved by technology

The structural design of the technical solution is complicated, the cost is high, and the production and assembly are inconvenient; and after the technical solution is injected, part of the liquid medicine will remain in the syringe due to its structural design; at the same time, the needle tube, the core rod and the outer cover of the technical solution are fixed on the Together, it cannot be replaced according to the situation when using it in this way, which is more wasteful

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