Protective needle cylinder with precise positioning function

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a protective needle cylinder with an accurate positioning function. By arranging the fixed shaft body unit, the opening rotating pipe unit, the mounting hole unit and the protruding block unit on the connecting pipe of the needle cylinder, the whole injection operation process of the needle cylinder is safer, more accurate and more reliable. The invention has the following advantages: firstly, the open rotating tube unit can perform structural protection on the needle head, so that the risk that the needle head is bent and deformed is reduced; secondly, the opening rotating tube unit has a clamping and positioning effect during injection and scrapping, so that a needle head is not easy to expose accidentally, and puncture accidents are not easy to cause; thirdly, the whole rotating and clamping operation of the opening rotating pipe unit is simple, stable, reliable and accurate; and fourthly, the external structure protection function of the whole needle head is simple and efficient, and after the needle head is matched with an internal rubber tube, the comprehensive sealing protection and structure protection effects can be achieved.

Description

Technical field [0001] The present invention belongs to the technical field of medical appliances, and more particularly to a precisely positioned protective syringe. Background technique [0002] The composition of the syringe synthetic structure mainly includes a cylinder, a connecting tube, a needle, and a needle sleeve, and a push rod plug is plugged in, which is a complete syringe. Among them, the existing common needle structure is a simple rubber tube, which can be preliminarily sealed to protect the needle. [0003] For example, the patent notice number is CN2756243Y, which is an announcement date of 2006.02.08, China Utility, Patent Patent Publication Open a pull-on safety injection syringe, including: needle sleeve, upper pin, lower pin, rubber plug, push rod and The tubular body is formed by combining the complete safety injection syringe. After the drug is injected, it can be pulled by the push rod, and the lower needle is pulled down, and the lower needle is pulled d...

AI Technical Summary

Problems solved by technology

[0008] But, this anti-stab syringe still has the following problems at least: 1. The effect of "external protection" is not comprehensive enough, and the needle may still be easily Bending and bending; 2. During the injection operation of the syringe, there is no fixed force in the opening state of the U-shaped frame, which makes the medical staff have to keep pressing the U-shaped frame during the injection operation, which is very laborious and dangerous 3. The force of the U-shaped frame to protect the needle comes from only a torsion spring, which is not enough. Once the U-shaped frame is bumped and rotated, the needle is exposed again, which is very dangerous

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