Disposable safe syringe capable of automatically retract with replaceable needles

Abstract

The invention discloses a disposable safe syringe capable of automatically retract with replaceable needles, and relates to the technical field of medical apparatus. The syringe comprises a needle cylinder (1), a push rod (2), a dispensing needle (3) and an injection needle (4), wherein the dispensing needle (3) or the injection needle (4) can be replaced according to the using requirement so as not to have negative effect on human body injection due to the deformation of the needle and influence on glossiness and sharpness caused by medicament dissolution. During use, the conventional operation habit is basically unchanged, the syringe is convenient to use and has reliable action, the injection needle can still retract and hide trough an automatic retraction mechanism after injection is finished so as to ensure that doctors and patients are prevented from accidentally hurt by a stained needle; and the used syringe cannot be used repeatedly for the injection, so the disposable syringe is realized in the real sense and hematogenous diseases are prevented from spreading. The syringe is particularly suitable for automatic assembly production in a production line due to reasonable structural design and has high quality and qualification rate.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a safety syringe with a replaceable and automatically retractable needle that can only be used once. Background technique [0002] At present, 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, the prior art disposable sterile syringes - including self-destructing, manual retracting, automatic retracting and other forms of disposable sterile syringes - due to imperfect design and structure, lack some necessary functions, Can not fully meet the needs of use. For example, 1. When using dry powder injection to prepare injection liquid, after injecting the solution into the sealed powder drug container, the injection needle will inevitably be deformed and have an impact on the smoothness and sharpness...

AI Technical Summary

Problems solved by technology

However, the prior art disposable sterile syringes - including self-destructing, manual retracting, automatic retracting and other forms of disposable sterile syringes - due to imperfect design and structure, lack some necessary functions, Can not fully meet the needs of use

For example, 1. When using dry powder injection to prepare injection liquid, after injecting the solution into the sealed powder drug container, the injection needle will inevitably be deformed and have an impact on the smoothness and sharpness of the needle. Strictly speaking, The injection needle used to puncture the rubber stopper of the medicine bottle can no longer be used to inject the human body when preparing the medicine solution, and only a disposable sterile syringe needs to be used to inject the prepared medicine solution. On the one hand, this aggravates the On the other hand, it is also difficult for the injection needle to avoid contact with the rubber stopper of the medicine bottle. Moreover, some countries have prepared liquid medicine to puncture the rubber stopper of the medicine bottle. The used injection needle can no longer be used to inject the human body. Mandatory requirements in this regard

And the disposable aseptic syringe of prior art, especially the safety syringe that needle can retract automatically, generally all does not have the function that can change needle; , but most of the products cannot be used only once structurally, and most of them can be reused. Second-time use and recycling cause serious consequences of cross-infection; 3. At present, hospitals have begun to use safety syringes with self-retracting needles, but most of these syringes fix the injection needles by tightening the needle seat. The disadvantages of this method There are two, one. In the production process, the processing accuracy of other parts is required to be high. Second, the product is affected by the processing accuracy and the influence of the climate environment, and its force against the retraction of the injection needle is also greatly weakened;

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