Inner-wound-free slight soreness medical needle and machining method thereof

Abstract

The invention discloses an inner-wound-free slight soreness medical needle. The end, close to a needle point, of a puncture inner cutting edge is a sharp cutting edge segment. The end, close to a radial cutting edge, of the puncture inner cutting edge is an arc pressing segment. The cross section of a vertical section of an inner-wound arc cutting edge is in an arc shape. The arc radius of the arc top end of the inner-wound arc cutting edge is larger than the arc radii of the two sides. The radial cutting edge is in arc transition connection with a first oblique face and a left second oblique face or a right second oblique face. Meanwhile, a method for carrying out linear sand blasting air knife grinding on the needle part at the front end of a needle tubing through a linear sand blasting nozzle is introduced, and specific process requirements for sand blasting air knife grinding machining and a structure of the linear sand blasting nozzle are put forward. According to the inner-wound-free slight soreness medical needle, structural improvement on three aspects is carried out on the need point part of an existing medical needle, an unpredictable technical effect is achieved, the soreness generated at the beginning of punching of the needle is relieved, and the soreness caused by secondary scratching during deep insertion and pulling out of the needle is eliminated.

Description

[0001] Technical field:

[0002] The invention relates to a medical needle, in particular to a medical needle which does not cause internal wounds caused by picking human tissues during injection into the needle and a processing method thereof, belonging to the field of medical devices.

[0003] Background technique:

[0004] Medical needles are the most well-known medical devices. Injections, blood transfusions and infusions are the most conventional means of treatment after illness. Existing medical needles are as described in the background technology section of Chinese patent specification 200610112919.5 by Kunming applicant Yang Changyan. "The existing medical needle structure is usually made of thin stainless steel tubes. The first bevel is formed at one end of the stainless steel tube by cutting for the first time, and then the second bevel is cut on the basis of the first bevel. About 30% to 40% of the front end forms a second arc surface. Since the stainless steel tube...

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