Safety self-destructive syringe

Abstract

The invention discloses a safety self-destructive syringe, and the difference thereof from the prior art lies in: the syringe, an extension shrapnel on the neck of the inner syringe of the syringe, a core rod, a piston sleeved on the front end of the core rod, a piston fixing seat, a replaceable needle seat which is matched with the syringe body and can be pulled back, a seal ring, a needle seat and a needle. The replaceable needle seat is fixed and matched with the extension shrapnel on the neck of the inner syringe of the syringe body at the rear part. After injection is over, the piston fixing seat on the front end of the core rod pushes the extension shrapnel on the neck of the syringe outwards; and after the injection, a pull-back connection column on the front end of the core rod smoothly pulls the needle seat back into the syringe body, and a ring on the syringe body which prevents the core rod from being pushed back and being pulled out is used for locking the core rod, so that the core rod cannot move forwards or be pulled back. The safety self-destructive syringe breaks through the design philosophy of a traditional syringe, and has the advantages of reasonable structural design, high safety, low manufacturing process difficulty, few procedures, cost saving, easy production and easy popularization.

Description

Technical field: [0001] The patent of the present invention relates to the technical field of medical devices, specifically a replaceable needle and needle holder, and a safe self-destructing syringe that can be pulled back. Background technique: [0002] Unsafe injections include abuse of injections, unsterilized syringes, reuse of disposable syringes, improper disposal of waste, operational contamination, and preparation contamination. According to incomplete statistics, 21.7 million people are infected with hepatitis B virus, 2 million people are infected with hepatitis C virus, and 96,000 people are infected with HIV every year due to unsafe injections, causing 1.3 million people to die early, and direct medical expenses amounting to 535 million US dollars. [0003] Since the first report on the harm of needlestick injuries to medical staff in 1981, a large number of studies on the characteristics of "occupational exposure of medical staff" have been carried out internationally...

AI Technical Summary

Problems solved by technology

[0004] In order to avoid the occurrence of the above-mentioned incidents, there are currently some safety syringes in which the needle holder is arranged in the barrel neck, and the needle holder can be pulled into the needle barrel after use. The basic design structure of this type of safety injection is A metal hook is added to the front end of the core rod piston, or a barb is connected to the lower end of the needle seat. After the injection is completed, the needle seat can be pulled back into the syringe by the pulling force of the metal hook to achieve safety purposes, but its There are certain shortcomings in the design structure: 1. The simple metal hook structure has a high error rate when used, and the stability is poor when used in batches, and the effect is not very ideal in actual use; 2. The structure of this type of metal hook is fine, The manufacturing process is difficult and requires high materials, which leads to an increase in production costs, and it is easy to cause some inferior products on the market

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