Disposable safety syringe with needle capable of being replaced and automatically retracted

Abstract

The invention provides a disposable safety syringe with a needle capable of being replaced and automatically retracted and relates to the technical field of medical appliances. The disposable safety syringe comprises a needle cylinder (1) and a pushing rod (2), and also comprises a dispensing needle (3) and an injecting needle (4). The dispensing needle (3) and the injecting needle (4) can be replaced according to the use demand. Body injection cannot be undesirably influenced because an injected liquid deforms the needle and influences finish and sharpness. The syringe does not basically change the conventional operation habit, and has the advantages of convenient use and reliable action during use. The injecting needle still can be retracted and hidden through an automatic retraction mechanism after finishing the injection so as to ensure that medical staff and patients cannot be damaged by polluted needle tips, and the used syringe cannot be reused for injecting to realize real disposable use of the syringe, and to avoid spreading blood-borne diseases. Because of reasonable structural design, the syringe is suitable for automatic assembly production of production lines, and has high quality and high qualification rate.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a disposable safety syringe with replaceable needles and automatic retraction. Background technique [0002] At present, the use of disposable sterile safety 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 syringes—including self-destructing, manual retracting, automatic retracting and other forms of disposable syringes—due to imperfect design and structure, lack some required functions, and cannot fully meet the needs of use. above needs. For example, when using a dry powder injection to prepare a liquid medicine, after injecting the solution into the sealed powder drug container, the syringe needle will inevitably be deformed and affect the smoothness and sharpness of the needle. Strictly speaking, th...

AI Technical Summary

Problems solved by technology

However, prior art disposable syringes—including self-destructing type, manual retracting type, and automatic retracting type disposable syringes—due to imperfect design and structure, lack some required functions, and cannot fully meet the needs of use. on demand

For example, when using a dry powder injection to prepare a liquid medicine, after injecting the solution into the sealed powder drug container, the syringe needle will inevitably be deformed and affect the smoothness and sharpness of the needle. Strictly speaking, the puncture of the bottle stopper 1. Injection needles used for preparing medicinal solutions can no longer be used for human injection, but only one more disposable syringe can be used. Moreover, some countries already have mandatory requirements in this regard

And prior art disposable syringes, especially safety syringes whose needles can retract automatically, generally do not have the function of changing needles

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