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Spring type safety self-destruction syringe

A spring type, syringe technology, applied in the direction of syringes, hypodermic injection devices, infusion sets, etc., can solve the problems of complex structure and assembly process, and achieve the effect of novel structure and simple assembly process

Inactive Publication Date: 2008-03-19
罗松能
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Described syringe, its weak point is that structure and assembly process are complicated

Method used

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  • Spring type safety self-destruction syringe
  • Spring type safety self-destruction syringe
  • Spring type safety self-destruction syringe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1, referring to Fig. 1-Fig. 2, a spring safety self-destructing syringe, including a needle cover 1, a steel needle 2, a needle seat 3, a syringe 10 and a core rod 11 located in the syringe, the upper part of the needle seat A steel needle 2 is installed, and a glue filling cavity 22 is set on the upper end of the needle seat, which is used for fixing and sealing the steel needle after sizing. A washer 4 is arranged between the inner walls, and the washer 4 is elastically tightly fitted with the peripheral wall of the convex ring and the inner wall of the injection cylinder to form a non-return device for the needle seat; the core rod 11 is a hollow cylindrical structure, and a spring is arranged inside the core rod. A rubber plug 7 is arranged on the upper end, a bottom plug 12 is arranged at the lower end, a diameter-reducing pipe section 25 is arranged on the upper part, and an end plug 9 is arranged on the reducing-diameter pipe section. There is a convex...

Embodiment 2

[0021] Embodiment 2, with reference to Fig. 3-Fig. 4, this spring safety self-destruction syringe compares with embodiment 1, and its difference is to adopt the elastic rubber stopper as shown in Fig. 3, and elastic rubber stopper comprises lower ring 71, middle ring 72 and The upper ring 73, the lower ring and the middle ring are connected in one piece, and the upper ring is connected with the middle ring through an elastic compression ring 75, and a groove 74 is provided on the shaft hole of the elastic rubber plug. The rest of the structure and working principle are the same as in Embodiment 1.

Embodiment 3

[0022] Embodiment 3, referring to Fig. 5-Fig. 7, the difference between this spring safety self-destructing syringe and Embodiment 2 is that: (a) the injection cylinder adopts a combined structure, and the cylinder body 15 and the outer needle seat 16 are connected by threads Composition, the external thread 17 is provided at the bottom of the outer needle seat, the sleeve 19 and the interlayer thread 18 are provided at the top of the cylinder body, the cylinder body 15 is connected with the outer needle seat 16 through threads; (b) the needle seat non-return device is arranged on the needle The snap ring 20 on the outer peripheral wall of the seat 3 and the snap groove 21 arranged on the inner peripheral wall of the outer needle seat 16 are formed, which can not only prevent the inner needle seat from retracting, ensure the smooth progress of the injection work, but also play a sealing role , which has the advantage of being conducive to mechanized and automated assembly line ...

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Abstract

The present invention relates to a spring type safe self-destruction injector which consists of a steel needle, a nerlsbed, an injection tube and a core rod. The upper part of the nerlsbed is installed with the steel needle, and the lower end is provided with a convex ring. A gasket is arranged between the wall of the convex ring and the internal wall of the upper part the injection tube. The core rod is a hollow cylindrical structure, the top of which is arranged with a rubber plug and the lower end of which is arranged with a bottom plug. A diminishing pipe is arranged on the upper part of the core rod. The diminishing pipe is provided with an end plug. A snap groove is arranged on the internal wall of the diminishing pipe. The external wall of the end plug is provided with a snap convex ring. The snap convex ring and the snap groove are matched together by a snap buckle. A steel needle back-pull equipment is arranged between the end plug and the lower end of the nerlsbed. The steel needle back-pull equipment is composed by a snap hook which is arranged at the lower end of the nerlsbed, a snap ring which is arranged at the top end of the end plug and a spring which is arranged at the lower end of the end plug. The present invention has the features of novel structure, simple assembling technology and so on, and is suitable for production chain large-scale mechanization manufacturing.

Description

Technical field: [0001] The invention relates to a disposable syringe, in particular to a safe self-destruction syringe which can make a steel needle bounce back into a syringe after use. Background technique: [0002] In order to avoid cross-infection of viruses caused by using unhygienic syringes, disposable syringes have been widely used in the medical field. In order to put an end to artificial recycling and reuse, people set self-destruct devices on disposable syringes. However, although ordinary self-destructing syringes can prevent the cross-infection of viruses caused by the repeated use of syringes to a certain extent, after the syringes are used, the exposed steel needles cause many problems in the collection, transportation, and processing of discarded syringes. Inconvenient, still may stab medical staff and other relevant personnel, cause the infection of virus bacteria. [0003] Chinese patents have disclosed a number of self-destructing safety syringes with s...

Claims

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Application Information

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IPC IPC(8): A61M5/50A61M5/31A61M5/178
Inventor 罗松能
Owner 罗松能
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