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Improved low-speed retraction injector of needle

A syringe and quick-return technology, used in syringes, hypodermic instruments, needles, etc., can solve problems such as secondary cross-infection, and achieve the effects of easy operation, high reliability and reasonable structure

Inactive Publication Date: 2010-06-09
SHANGHAI SOL MILLENNIUM MEDICAL PRODUCTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This syringe thoroughly solves the problem of secondary cross-infection existing in the prior art

Method used

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  • Improved low-speed retraction injector of needle
  • Improved low-speed retraction injector of needle
  • Improved low-speed retraction injector of needle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] see figure 1 and Figure 5 , an improved needle slow retraction syringe, including a hollow syringe 1, a hollow pusher 2 installed in the syringe 1, a rubber stopper 3 installed at the head of the hollow pusher 2, and a shrinking part of the front end of the syringe 1 A needle holder 4 is installed, and the needle holder 4 is supported by a locking ring 5 tightly matched with the inner wall of the front end of the needle cylinder 1. The lower end of the needle holder 4 is provided with an elastic claw 6, and the number of the elastic claw 6 is at least two. The inner wall of the barrel is provided with a groove 7 in which the elastic claw 6 is embedded (see Figure 4 ), the upper end of the locking ring 5 extends into the inner hole of the needle holder, the top of the locking ring 5 is provided with an elastic pawl 8 gathered toward the center, the outer ring of the upper end of the locking ring 5 is provided with a flange 9, and the inner hole wall of the needle hold...

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Abstract

The invention relates to an improved slowly-withdrawing needle injector, which includes a hollow syringe, a hollow pushing cylinder arranged in the syringe, and a rubber plug arranged on the head partof the hollow pushing cylinder. A neilsbed is arranged on the contracted-diameter part on the front end of the syringe. The improved slowly-withdrawing needle injector is characterized in that the neilsbed is supported by a locking ring closely matching the front-end inner wall of the neilsbed, a slowly withdrawing piece axially corresponding to and matching with the locking ring shaft is arranged in the pushing cylinder, a blocking core is arranged on the upside of the slowly withdrawing piece, the blocking core and the locking ring are interlocked together by a clamping mechanism, a first springy supporting claw which contacts the inner wall of the pushing cylinder during withdrawal is arranged on the lower part of the slowly withdrawing piece, a compression spring is arranged between the pushing cylinder and the slowly withdrawing piece. After the injection is done, the upper part of the slowly withdrawing piece and the locking ring are interlocked, the compression spring ejects the slowly withdrawing piece to drive the locking ring and the neilsbed to break away from the inner wall of the syringe, the slowly withdrawing piece slowly slides down to the under side of the pushingcylinder along the inner wall of the pushing cylinder.

Description

technical field [0001] The invention relates to a medical syringe, in particular to a medical syringe whose needle can be retracted and hidden after injection so as not to be exposed and hurt people. Background technique [0002] The practice of modern medicine has proved that in order to avoid cross-infection when injecting or taking out media for humans or animals, hypodermic syringes must be used once and disposed of as garbage after use. The most used disposable syringe is composed of a hollow syringe, a needle and a fixed stroke piston fitted in the syringe. The biggest problem with this type of syringe is that after the injection is completed, the needle still stays outside. Compared with As far as the sharpness of the needle is concerned, it not only brings inconvenience to the handling and destruction of syringe waste, but also often injures medical staff due to carelessness, which inevitably leads to secondary cross-infection of germs, especially For those syringes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/31A61M5/315A61M5/32A61M5/178
Inventor 林作钱
Owner SHANGHAI SOL MILLENNIUM MEDICAL PRODUCTS CO LTD
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