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Syringe capable of retracting needle

A syringe and needle body technology, applied in the field of syringes, can solve the problems of lack of safety, prone to needle stick events, falling and other problems

Inactive Publication Date: 2009-04-29
许 明正 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the traditional syringe includes a needle cover covering the needle body, it is often lost or dropped, and because the needle cover has a very limited aperture for the needle body to pass through, the user must be careful after completing the injection. In the action of returning the trocar cover, if there is a little carelessness or an external force, it is easy to have a needle stick event, so there is a lack of safety when using it

Method used

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  • Syringe capable of retracting needle
  • Syringe capable of retracting needle
  • Syringe capable of retracting needle

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Experimental program
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Embodiment Construction

[0038] Before the present invention is described in detail, it is noted that in the following description, similar components are denoted by the same reference numerals.

[0039] As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the first preferred embodiment of the retractable needle injector of the present invention includes a syringe body 1 , a needle holder 2 , a needle set 3 and a push rod 4 .

[0040] The syringe body 1 has a tube wall 12 surrounding an axis X and defining a bore 11 , a shoulder 13 and a recess 14 . The pipe wall 12 has an inner surface 121 adjacent to the axis X, an outer surface 122 away from the axis X, an outlet end 123 formed at a front end, an outlet end 123 formed at a rear end and opposite to the outlet end 123 Inlet end 124, a large pipe diameter section 125 adjacent to the inlet end 124, a small pipe diameter section 126 adjacent to the outlet end 123, a conical surface adjacent to the large and small pipe diameter sections 125, 126 and forming a smoo...

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PUM

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Abstract

The invention discloses a syringe capable of retracting needle which comprises a syringe body, a needle seat positioned securely in the syringe body, a needle body connected with the needle seat, and a push rod arranged in the syringe body in a slidable manner, the needle seat is provided with a fastening groove for forming a plurality of fastening ribs, the push rod is provided with a fastening head for forming a plurality of rib grooves. After the injection is completed, the push rod can smoothly draw the needle seat and the needle body back into the syringe body in a hidden manner.

Description

technical field [0001] The invention relates to a syringe, in particular to a syringe with a retractable needle that can improve the safety of use. Background technique [0002] Generally, the sharp needle body of the syringe after injection must be properly handled to avoid the needle body from stabbing the human body, or even being infected by the blood with the source of infection remaining on the needle body. Although the traditional syringe includes a needle cover covering the needle body, it is often lost or dropped, and because the needle cover has a very limited aperture for the needle body to pass through, the user must be careful after completing the injection. In the action of returning the trocar cover, if there is a little carelessness or an external force, it is easy to have a needle stick event, so there is a lack of safety during use. [0003] Therefore, in order to improve the lack of use of the above-mentioned injection syringes, the patent applications fo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/31A61M5/178
Inventor 许明正黄明敏许沛扬
Owner 许 明正