Disposable injection needle capable of being safely retracted

Abstract

The invention discloses a disposable injection needle capable of being safely retracted. The disposable injection needle comprises an outer sleeve, a core rod which is inserted into the outer sleeve and is provided with a channel, a needle tube, a piston or an O-shaped ring and a sheath, wherein the upper end of the core rod is provided with a handle, and the lower end of the core rod is provided with a needle tube hole communicated with the channel; a clamping groove is formed on the outer wall of the core rod; the piston or the O-shaped ring are clamped between the clamping groove and the outer sleeve; the piston rod or the O-shaped ring and the outer sleeve move relative to each other to drive the core rod and the outer sleeve to move relative to each other; a plurality of through notches are formed on the inner wall of the upper end of the outer sleeve; when moving to the through notches, the piston or the O-shaped ring is clamped into the through notches; the needle tube is fixed in the needle tube hole; and the sheath is sleeved at the lower end of the core rod and is sleeved outside the needle tube. By the disposable injection needle capable of being safely retracted, an over-tightening phenomenon generated in the process of retracting the injection needle is prevented, and medical treatment risks of injection needles are greatly reduced.

Description

Technical field [0001] The invention relates to an injection needle, in particular to a disposable retractable safety injection needle. Background technique [0002] Injection needles are currently one of the world's most sold medical device products. However, it is worth noting that at present, there are millions of human injuries caused by broken needles or improper operation of medical staff in hospitals around the world every year. Statistics released by the American Medical Association show that there are about 1 million medical staff accidentally injured by injection needles each year in the United States alone, and at least a thousand of them will be infected by hepatitis B virus, hepatitis C virus and HIV attached to the needle. The cost of emergency treatment for medical staff and patients who are stabbed by a broken blood collection needle each time is US$3,000 per capita. [0003] The medical risk caused by ordinary injection needles will not be lower than that of syri...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a one-time use retractable safety injection needle to overcome the defects of low medical risk, complicated operation, and overtightening phenomenon in the retraction process in the prior art.

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