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A low-resistance pull-back self-destruct syringe

A syringe and resistance-return technology, which is applied in the field of syringes, can solve the problems such as the inability of the needle holder to be used normally and the difficulty in pulling back, and achieve the effect of solving the difficulty in pulling back and reducing the resistance to pulling back.

Active Publication Date: 2015-11-18
浙江龙德医药有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it effectively solves the problem that the needle seat is difficult to pull back when it is effectively fixed, and the needle seat cannot be used normally when it is effectively pulled back

Method used

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  • A low-resistance pull-back self-destruct syringe
  • A low-resistance pull-back self-destruct syringe
  • A low-resistance pull-back self-destruct syringe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] see figure 1 , figure 2 and image 3 , a low-resistance retractable self-destructing syringe, comprising a sheath assembly 1 and a push rod assembly 2 slidably connected in the sheath assembly 1 . The sheath assembly 2 includes a sheath 10 , a needle seat 11 and a control sleeve 12 arranged in the front part of the inner hole of the sheath 10 , and a locking ring 13 arranged in the rear part of the inner hole of the sheath 10 . The front part of the jacket 10 is narrowed, and a front shoulder 101 is arranged at the front end of the narrowed mouth, and a front card slot 102 is arranged on the inner wall of the rear part of the narrowed mouth. The outer ring of the front end of the needle holder 11 is adapted to the necking of the jacket and the front end of the needle holder 11 is axially limited by the front shoulder 101 of the necking. The needle connecting portion 111 is provided with a Roll thread on the needle connecting portion 111 for connecting the needle. T...

Embodiment 2

[0023] In this embodiment, except that the control structure of the control sleeve for axially limiting the rear end of the needle seat is different, the rest are the same as in the first embodiment.

[0024] see Figure 5, in this embodiment, the axial limit of the needle holder 11 in the outer casing 10, the front end is limited by the front shoulder 101 on the outer casing 10 and the end surface of the outer ring of the front end of the needle holder 11, and the rear end is set on the needle holder by 11 The supporting claws 121 arranged in the circumferential direction at the rear end are limited by the front locking groove 102 on the inner wall of the casing 10 . When the needle base 11 is inserted into the inner hole of the outer casing 10 and is pushed forward, it is directly snapped in and fixed. The control sleeve 12 is provided with a control ring 122, on both sides of the support claw 121 at the rear end of the needle holder 11, there are axially extending straight...

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PUM

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Abstract

The invention discloses a low-resistance pull-back type self-destroying syringe which comprises an outer sleeve component and a push rod component connected with the interior of the outer sleeve component in a sliding manner, wherein the outer sleeve component comprises an outer sleeve and a syringe needle base connected with the interior of the front part of the outer sleeve, the push rod component comprises a push rod and a piston arranged on the push rod, the push rod is provided with a core rod for drawing the syringe needle base to retract, the syringe needle base is connected with the interior of the outer sleeve through a connecting structure, the outer sleeve component comprises a control sleeve for controlling the connecting structure and enabling the syringe needle base to be disconnected with the outer sleeve, and the core rod is in selective one-way connection with the control sleeve and pulls back the syringe needle base through the control sleeve. According to the low-resistance pull-back type self-destroying syringe, the connecting structure of the syringe needle base and the outer sleeve is controlled through the control sleeve, so that the axial limit of the syringe needle base and the outer sleeve is removed when the syringe needle base is pulled back through the push rod. Therefore, the problems that the syringe needle base is difficult to pull back during effective fixation and cannot be normally used during effective pulling back are solved.

Description

technical field [0001] The invention relates to a syringe mainly used for subcutaneous injection, intramuscular injection or intravenous injection, especially a syringe with the functions of self-destructing for one-time use, pulling back the needle to avoid accidental stabbing of medical personnel and other personnel, and belongs to the field of medical equipment . Background technique [0002] Disposable syringes are widely used in the medical field to avoid virus cross-infection caused by using unhygienic syringes. Ordinary disposable syringes may be used twice, causing some medical units to operate illegally. Driven by economic interests, they use disposable syringes twice or even multiple times. Therefore, it is an urgent demand in the market to design a disposable syringe with a self-destruct function to prevent the possibility of the disposable syringe being used again. [0003] Because the needle of the syringe is exposed outside after use, it is easy to stab the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M5/178A61M5/34A61M5/50
Inventor 冯宗博朱冠林王晓龙陈建华杨俊丽
Owner 浙江龙德医药有限公司