A kind of medical needle without internal trauma and slight pain and its processing method

Abstract

The invention discloses a medical needle without internal trauma and slight pain. The inner cutting edge of the puncture is a sharp cutting edge section close to the needle tip, and the end of the inner cutting edge of the puncturing near the radial cutting edge is a circular arc compression section. The cross-sectional shape of the vertical section of the cutting front is arc-shaped, and the radius of the arc at the top of the arc of the internal arc cutting front is greater than the radius of the arc on both sides, and the radial cutting edge is in contact with the first bevel and the second left bevel Or there is a circular arc transition connection between the second right slope. At the same time, it introduces the method of linear sandblasting air knife grinding on the needle part of the front end of the needle tube with a linear sandblasting nozzle, and puts forward the specific process requirements of sandblasting air knife grinding and the structure of the linear sandblasting nozzle. The invention improves the structure of the needle point of the existing medical needle in three aspects, and has achieved unpredictable technical effects, which reduces the pain of the needle at the beginning of puncture, and eliminates the need for re-use when the needle is deeply inserted and pulled out. Pain from scratches.

Description

Technical field: [0001] 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. Background technique: [0002] 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 has a certain ...

AI Technical Summary

Problems solved by technology

Therefore, according to the existing sand blasting processing method, the design requirements cannot be met

[0008] In the existing medical needle processing technology, although the sandblasting method has been used to sandblast the needle tip of the needle, the purpose is to remove the grinding burrs on the needle tip and each cutting edge, and the existing sandblasting nozzle They are all integral structures. The sandblasting hole is set at the center of the sandblasting body. The sandblasting hole is a cylindrical hole. Greater than 1.0MPa, otherwise the effect of deburring will not meet the requirements of the national standard

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