A needle device for a safety syringe

Abstract

The invention discloses a needle device for a safety syringe, comprising a needle cap and a thin needle tube. A plurality of sets of ratchets are distributed around the top side wall of the thin needle tube, and each set of ratchets includes at least two sets of pawls along the length of the thin needle tube. The ratchet claws are distributed in the directions. There are a plurality of ratchet claws corresponding to each group of ratchet claws around the inner wall of the inner hole of the needle cap. The ratchet block is clamped, and the outer wall of the top end of the thin tube of the needle is sealed with a sealing ring, and the outer circumferential wall of the sealing ring is sealed with the inner wall of the inner hole of the needle cap. The needle cap is truly separated and the needle can be recycled separately.

Description

technical field [0001] The invention relates to the technical field of medical injection instruments, in particular to a needle device for a safety syringe. Background technique [0002] A syringe is a common medical device. As early as the 15th century, the Italian Cartinel proposed the principle of the syringe. The main use of needles to extract or inject gas or liquid. Syringes can also be used in medical devices, containers, and scientific instruments such as some in chromatography to inject through rubber septa. [0003] The needles in the syringes are made of metal. About 4 billion needles are used in China every year. From the perspective of saving and resource reuse, the needles should be recycled and disposed of separately after use. However, most of the needle devices in the existing safety syringes adopt a fixed structure, and it is difficult to achieve true separation of the needle and the needle cap, and it is difficult to achieve that the recovered needle do...

AI Technical Summary

Problems solved by technology

However, most of the needle devices in existing safety syringes adopt a fixed structure, and it is difficult to separate the needle from the needle cap, and the needle that is difficult to recover does not have any plastic parts

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