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Syringe

A syringe and core rod technology, applied in the field of syringes, can solve problems such as unsafe syringes, and achieve the effects of convenient production and processing, safe use and simple structure

Pending Publication Date: 2020-03-13
GUANGDONG HAIOU MEDICAL APP STOCK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the unsafe defects of syringes in the prior art, thereby providing a safer syringe

Method used

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Examples

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Embodiment 1

[0050] like Figure 1-6 Shown is a specific embodiment of a syringe, including a syringe 1 , a pull-back member 3 , a needle seat 4 , and a core rod 2 . The needle barrel 1 includes a needle head installation cavity and a core rod installation cavity, and the cross-sectional area of ​​the needle head installation cavity is smaller than the cross-sectional area of ​​the core rod installation cavity; the outer side of one end; the pull-back member 3 is installed in the needle head installation cavity, the needle head 5 is installed on the pull-back member 3, and the end of the pull-back member 3 close to the core rod installation cavity is provided with a hollow space Cavity 36, the needle seat 4 is tightly connected with the pull-back member 3, such as figure 2 As shown, the side wall of the cavity 36 of the pull-back member 3 is provided with a first boss 31 as a biasing structure. When moving between retracted positions, the head of the core rod 2 enters and is clamped in ...

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Abstract

The invention provides a syringe, which comprises a needle cylinder comprising a needle head mounting cavity and a core rod mounting cavity, wherein the cross sectional area of the needle head mounting cavity is smaller than that of the core rod mounting cavity; a pull-back piece installed in the needle head mounting cavity, wherein the needle head is installed on the pull-back piece, and a cavityis formed in the end, close to the core rod mounting cavity, of the pull-back piece; a core rod arranged in the core rod mounting cavity and capable of moving between a push-out position and a returnposition, wherein the head of the core rod enters the cavity of the pull-back piece at the push-out position and is clamped in the cavity of the pull-back piece; a bias pressure structure arranged inthe cavity of the pull-back piece and / or the head of the core rod, wherein the head of the core rod applies bias pressure to the pull-back piece through the bias pressure structure, and when the headof the core rod moves to the retreating position, the bias pressure structure enables the pull-back piece and the needle head to incline deviating from the axis of the needle cylinder in the core rodmounting cavity through the bias pressure. After the syringe is used, the core rod is pulled back, the pull-back piece deflects in the needle cylinder, the needle head deflects along with the pull-back piece and cannot be pushed out of the needle cylinder again, and use is safer.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a syringe. Background technique [0002] Syringe is a common and widely used medical device, mainly used for liquid medicine or blood test. In recent years, in order to avoid repeated use and cross-infection, the use of disposable sterile syringes has been promoted. However, the existing single-use sterile syringes remain intact after they are used up and can be reused, which gives opportunities to some criminals, brings the hidden danger of cross-infection, and easily causes disease transmission. [0003] In the prior art, there is a pull-back self-destructing syringe, which includes a needle, a needle seat, a syringe barrel and a push rod. A rubber plug is installed at the lower part of the rod, the lower end of the push rod is provided with a barb fixing part which passes through the rubber plug, a spring barb with an upward opening is fixed on the barb fixing pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/178A61M5/31A61M5/315A61M5/32A61M5/50
CPCA61M5/178A61M5/3129A61M5/31511A61M5/50A61M5/322A61M5/34
Inventor 张卓旋张江生
Owner GUANGDONG HAIOU MEDICAL APP STOCK
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