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Safe self-destroyed syringe with greater force for preventing needle from withdrawing

A technology of syringe and needle withdrawal, applied in the field of medical devices, can solve the problems of medical accidents, insufficient force for preventing needle tip withdrawal, etc., and achieve the effect of preventing needle withdrawal

Active Publication Date: 2008-10-15
WUXI YUSHOU MEDICAL APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing safety syringes are easy to retract the needle point into the syringe jacket due to insufficient anti-retraction force during clinical needle insertion, and the liquid medicine leaks everywhere on the patient's body, causing medical accidents

Method used

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  • Safe self-destroyed syringe with greater force for preventing needle from withdrawing
  • Safe self-destroyed syringe with greater force for preventing needle from withdrawing

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Comparison scheme
Effect test

Embodiment Construction

[0011] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0012] As shown in the figure: a tubular installation part 24 with a shrinking inner diameter is arranged on the top of the outer straight pipe 1, and a sealing plug 7 is arranged in the outer straight pipe 1, and the lower end of the sealing plug 7 is connected with a part extending out of the outer straight pipe 1. Core rod 6, the outer surface of the core rod 6 is provided with an outer protrusion 60, correspondingly, an inner protrusion 101 that blocks the outer protrusion 60 is provided on the outer straight tube 1, and a movable needle seat is inserted into the installation part 24 , a needle tube 17 is arranged in the movable needle seat, and the inner cavity of the outer straight tube 1 surrounded by the movable needle seat and the sealing plug 7 is the injection liquid storage cavity 22, and the inlet end of the needle tube 17 communicates with the inje...

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Abstract

The invention relates to a safe self-destruction injector with greater needle withdrawal resistance force. A mounting part is arranged on the top of a jacket straight tube; a closing plug is arranged inside the jacket straight tube; a core rod extending out of the jacket straight tube is connected with the lower end of the closing plug; an outer heave is arranged on the outer surface of the core rod, and an inner heave is arranged on the jacket straight tube; a movable needle stand is inserted in the mounting part; a needle tube is arranged inside the movable needle stand; the outer heave is arranged on the side wall of the movable needle stand, and the inner heave is arranged on the inner surface of the mounting part; a latch hook is arranged on the bottom end of the movable needle stand; a takeup incline of the latch hook is arranged on the closing plug; a deflection hole is arranged under the takeup incline; a locking part that connects the closing plug and the latch hook into a whole is arranged on the closing plug; an orbicular groove is arranged on the outer surface of the movable needle stand; a orbicular depression which is matched with the groove is arranged on the inner wall of the mounting part at the groove; an elastic packing ring which forms a interference fit with the groove and the depression, is arranged in the groove and the depression. The safe self-destruction injector has greater force for resisting needle withdrawal, realizes the self-destruction after injecting, and has the characteristic of low force for pulling back a syringe needle.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a safe self-destruction syringe with a greater force for preventing needle withdrawal. Background technique [0002] At present, there are many kinds of self-destructing syringes, and there are also many safe syringes, but there are not many syringes that can both self-destruct and achieve safe effects. The structure of general safety syringes is mostly in the form of retracting the needle. In this structure, there is a technical contradiction that is extremely difficult to solve, that is, the force to prevent the needle from being withdrawn must be stronger than the force of artificially (automatically) retracting the needle. big contradiction. If the force of setting positioning (preventing needle withdrawal) is large enough to prevent needle withdrawal, the force of retracting the needle head will be equally large, and it will be even greater, which is not easy to ach...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/50A61M5/31A61M5/315A61M5/32A61M5/178
Inventor 庄明忠
Owner WUXI YUSHOU MEDICAL APPLIANCES
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