Safety injector with automatically retractable needle

Abstract

The invention provides a safety injector with an automatically retractable needle, which relates to the technical field of medical instruments. The safety injector with the automatically retractable needle comprises the needle, a needle cylinder and a push rod, wherein the needle comprises a needle hub and a needle tube; the needle hub is a hollow core tube; the needle tube is fixedly inserted in the needle hub; the push rod is inserted into a cavity of the needle cylinder, wherein the safety injector with the automatically retractable needle further comprises a needle positioning and sealing device and a needle retracting device, so that the needle can automatically retract to be hidden as soon as injection is finished. The safety injector with the automatically retractable needle has reasonable structural, technical design and convenient assembly, is suitable for automatic assembly on a production line, improves the automation degree and efficiency of the production, high automatic assembly quality and high qualification rate, continues a traditional habitual method in use and is convenient in operation and reliable in effect; moreover, the needle retracts automatically to be hidden after the injection, so that the safety injector with the automatically retractable needle prevents doctors and patients from being hurt by sharp instruments with polluted needle points, contributes to the realization of true single use of the injector, avoids infections of blood-borne diseases and creates a safer and more sanitary medical environment.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a safety syringe with automatically retractable needles. Background technique [0002] The use of disposable sterile syringes when injecting medicinal solutions and inoculating preventive vaccines has played a positive role in controlling iatrogenic infectious diseases and preventing cross-infection. However, various existing disposable syringes—including push rod self-locking type, self-destructing type, etc.—have many deficiencies due to imperfect design and structure, lack of some necessary functions. For example, the needles of some syringes are exposed after use, which can easily cause sharp injuries, and there is a hidden danger of direct cross-infection. At the same time, the used syringes are still intact, which provides some criminals with the convenience of recycling. The syringes that should be discarded after use are reprocessed and then reused. In fact, ...

AI Technical Summary

Problems solved by technology

However, various existing disposable syringes—including push rod self-locking, self-destructing and other forms of disposable syringes—due to imperfect design and structure, lack of some necessary functions, there are many deficiencies

For example, the needles of some syringes are exposed after use, which can easily cause sharp injuries, and there is a hidden danger of direct cross-infection. The syringes that should be discarded after use are reprocessed and then reused. In fact, most of the disposable syringes in use today are policy-based "one-time use" and can be used repeatedly in practice, so it is difficult to achieve true In the sense of one-time use; there are also some syringes with complex structures, reversed or unsmooth assembly processes, and a low qualified rate of assembled products, which is not conducive to automatic assembly production on the assembly line. Compared with ordinary syringes, there are still differences in usage habits. big difference

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