Self-locking type self-breaking syringe

Abstract

The invention relates to a novel and safe self-lock and self-destroying injector, comprising a hollow syringe, a push rod sliding in the syringe and a rubber plug that is arranged at the front end ofthe push rod. The front end of the syringe is provided with a syringe needle base, the push rod is provided with a round platform, the round platform is provided with an elastic pawl that extends to the bevel of the inner wall of the syringe, the end of the syringe is provided with a diameter increasing part, the transition part between the diameter non-increasing part and the diameter increasingpart of the syringe is provided with an inclined step, a groove is provided below the inclined step, the elastic pawl can be blocked into the groove when the push rod is pulled down, and the diameterincreasing part is provided with a retaining ring that can support the bottom of the round platform. The push rod of the injector of the structure is provided with the elastic pawl that extends to theinner wall of the syringe, the elastic pawl is blocked into the groove when the push rod is pulled down, the inclined step above the elastic pawl prevents the push rod from moving upwards, and the retaining ring below the elastic pawl supports the bottom of the round platform of the push rod to prevent the push rod from moving downwards, thus achieving the aim of locking the push rod as the elastic pawl cannot move in radical direction owning to the groove.

Description

technical field [0001] The invention belongs to a medical device, in particular to a disposable self-destruct syringe. Background technique [0002] Syringes are an indispensable tool in medical treatment. In order to avoid cross-infection of blood, the current syringes are all disposable products, but this kind of disposable syringes can be reused if they are not artificially destroyed. Disposable syringes are reused to cause cross-infection and spread diseases, and many syringes have emerged as the times require. For example, in the pull-back safety syringe, when the push rod is pulled back, the injection needle is followed into the syringe, but when pushed by an external force, the needle will come out, which will also cause cross-infection. There is also a pull-back safety syringe 200410017938.0. When the push rod is pulled back, the injection needle will follow into the syringe, and the needle will be tilted to one side, making it difficult to pull out, but the needle ...

AI Technical Summary

Problems solved by technology

In addition, there is a defective part on the push rod. After the injection, the push rod is broken by force, destroying the push rod, and reaching self-destruction. Although the push rod of this type of syringe is destroyed, it can still be used after changing the push rod, which cannot achieve the goal of self-destruction. completely safe purpose

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