Medical injection needle and manufacturing method therefor

Abstract

The present invention relates to a medical injection needle and a manufacturing method therefor. The medical injection needle of the present invention is characterized in that the inside, made of a metal material, is formed as a hollow cylindrical tube; at one end of the tube, a cutting part (10) consisting of an inclined portion (11) and a horizontal portion (12) is formed wherein the inclined portion is downwardly inclined at a certain angle from the upper end on the side and has a lower end positioned lower than the central axis (a) of the tube, and the horizontal portion is connected with the front end of the inclined portion (11) and is formed parallel to the central axis (a) of the tube; at one end of the tube, a flat round part (20) having a convexly rounded shape on the plane is formed; and the shape of the side cross-sectional area of the horizontal portion (12) consists of a protrusion part (14) and a side round part (16), wherein the protrusion part has one front end connected with the front end of the lower inner circumferential surface (13) of the tube, is formed vertically upward from the front end of the lower inner circumferential surface (13) of the tube, and has the other front end connected with the horizontal portion (12); and the side round part has one side connected to the front end of the horizontal portion (12) and has the other side connected with the lower surface (15) of the tube while forming a curve downwardly. According to the present invention, the end of the injection needle takes a rounded shape when seen on the plane and takes a rounded shape in the upward direction from the bottom when seen from the side, and so a pointed portion is not formed and thereby damage to muscles, nerves, and blood vessels does not occur when inserted under the skin. Due to formation of the cutting part consisting of the inclined portion inclined at a certain angle from one side of the upper section when seen from the side, and the horizontal portion in parallel to the direction of the central axis, thread can be smoothly inserted while naturally hung in the cutting part during injection under the skin while a part of the thread is inserted. Particularly, due to formation of the fine protrusion at the end of the injection needle, even though the thread is not a thread provided with a twisted part, the thread is naturally twisted, bent and inserted during insertion of the injection needle under the skin, thereby enabling an exact surgical procedure. In addition, the injection needle is manufactured through sanding finishing following a cutting process of the cutting part after the end of a hollow tube is welded while a rod is placed thereon, and thereby the thread is naturally hung while the inner circumferential surface of the injection needle becomes smooth.

Description

technical field [0001] The present invention relates to a medical injection needle and its manufacturing method, in particular to an injection needle whose end is formed into an arc to prevent damage to the subcutaneous tissue, and a boss is formed on the end of the injection needle so as to be The invention relates to a medical injection needle for smoothly inserting the thread into the skin tissue and a manufacturing method thereof during thread embedding therapy in which the skin tissue is inserted into the injection needle. Background technique [0002] A general medical injection needle is formed into a tubular shape through which drugs can pass through for subcutaneous injection of drugs, and the end of the injection needle is formed into a sharp shape for smooth injection. [0003] Since the end of the conventional medical injection needle is formed into a sharp shape, it may tear the tissue and enter a desired part of the human body to cause damage to the tissue. In...

AI Technical Summary

Problems solved by technology

[0010] However, when the surface of a tubular needle with a diameter of less than 2 to 3 mm and a thickness of less than 1 mm is perforated by punching or the like, the injection needle is squeezed by the perforation, and a part of the inner peripheral surface protrudes toward the center, which may affect the The thread that is inserted into the injection needle and moved causes scratches, resulting in damage to the thread or thread breakage, etc.

[0011] In addition, forming a boss at the end of the injection needle is also very difficult to process, and when the blood vessels, nerves, muscles, etc. Greatly damage or cut blood vessels, nerves or muscles, etc., so only special care should be taken during surgery

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