Disposable safety syringe

Abstract

A high-safety expendable injector is composed of an injection needle, an injection tube, a protecting sleeve at the front end of said injection tube, a tubular push rod in said injection tube and with a sealing rubber ring, a piston, and a push end, a needle holder with a sleeve, a compressed spring plug, and a compressed spring between said plug and needle holder. Said sleeve of needle holder has at least one reverse hook which can be opened outward under the action of external force.

Description

technical field [0001] The present invention relates to a kind of medical device, more specifically, relates to a kind of injection medicine liquid and preventive vaccine used in the field of medical care and health, when the injection is finished, the injection needle is automatically retracted into the injection syringe, and the injection needle cannot be used after the injection. Disposable safety syringes for reuse. Background technique [0002] In recent years, disposable sterile syringes have been widely used in injecting liquid medicine and preventing vaccines, and have played a more active role in controlling iatrogenic infectious diseases and preventing cross-infection. However, there are still many defects in the currently used disposable sterile syringes during use: namely, the currently used disposable sterile syringes (including injection needle tubes) are exposed to the outside of the used injection needles and cause sharp injuries. Direct cross-infection of i...

AI Technical Summary

Problems solved by technology

However, there are still many defects in the currently used disposable sterile syringes during use: namely, the currently used disposable sterile syringes (including injection needle tubes) are exposed to the outside of the used injection needles and cause sharps to injure people. Direct cross-infection of infectious diseases occurs from time to time, and at the same time, it can still be kept intact after use, which provides convenience for some criminals to take advantage of the opportunity to recycle, that is, to clean and repack the discarded disposable syringes after use Later, it was sold out again, leading to cross-infection of infectious diseases, bringing extremely unsafe factors to patients, and it is difficult to achieve real one-time use

[0004] There are certain hidden dangers in the use of this disposable syringe:

[0005] (1) The seat cover 4 and the needle seat 2 are only positioned by the O-ring 10, and the injection needle tube 1 will receive a reaction force during the needle sticking process. If the reaction force is large, the needle seat 2 and the needle seat will be easily damaged. The fixation between the seat covers 4 leads to the failure of needle pricking;

[0006] (2) There is a stepped tight fit between the needle seat cover 4 and the compression spring plug 3, so the compression spring 8 may destroy this connection, and the compression spring plug 3 is separated from the needle seat cover 4, so that the compression spring plug 3 and the compression spring plug 3 are separated. The compression spring 8 flies out, which is dangerous and has problems such as inconvenient installation and unsafe hidden dangers during installation;

[0007] (3) Since the push end does not have a limit function, it is easy to misuse when there is no injection (inject liquid medicine into the medicine bottle and then draw the medicine liquid), that is, it is easy to make the stroke of the barrel push rod 7 too large, so that the injection needle tube 1 , the needle seat 2, and the piston 9 enter the inside of the barrel push rod 7 in advance, so that the syringe loses its use value in advance

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