Improved self-destructing injection syringe

Abstract

The invention relates to a structure-improved self-destructive injector comprising a hollow syringe, a push bar and a rubber stopper. The end of the syringe is connected with a diameter-increasing handle forming a hand-held part. A lock ring matched with the inner wall of the hand-held part for limiting is mounted in the hand-held part. The inner wall of the handle is equipped with a ring of big groove, and the inside of the lock ring is shaped with an elastic pawl which extends inwards. A first conical table is arranged at the lower end of the push bar, and the lower end of the first conical table is equipped with a second conical table which is locked with the elastic pawl after the injection is finished. When the injector is not used, the rubber stopper and the top end of the inner wall of the syringe prop against each other, and the elastic pawl is positioned between the first conical table and the second conical table. The lower part of the first conical table is an inclined plane or a circular arc plane. When the push bar is pushed downwards to draw liquid, the inclined plane or the circular arc plane can prop against the claw of the elastic pawl and drive the lock ring to slide downwards, thus the lock ring falls in the big groove, and the elastic pawl can run across the first conical table along the inclined plane or the circular arc plane. A thrust block for preventing advanced self-destruction is not necessary for the injector, and a piston is pushed to the bottom, that is, the piston is on the zero line before drawing liquid or blood, thus the amount of the drawing liquid is standard.

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, the push rod is provided with a clip that engages with the syringe. When the injection is completed, the push rod engages with the syringe, so that the push rod is locked in the syringe and cannot be used again, thereby achieving the purpose of self-destruction, but this The front end of the piston of the syringe is not on the 0-bit line before the liquid (blood) is drawn (that is, the piston is not pushed to the bottom), so the liquid (especially in...

AI Technical Summary

Problems solved by technology

[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, the push rod is provided with a clip that engages with the syringe. When the injection is completed, the push rod engages with the syringe, so that the push rod is locked in the syringe and cannot be used again, thereby achieving the purpose of self-destruction, but this The front end of the piston of the syringe is not on the 0-bit line before the liquid (blood) is drawn (that is, the piston is not pushed to the bottom), so the liquid (especially in the blood) is used, resulting in the defect that the dose of the drawn liquid (blood) is not standard, Moreover, this type of syringe needs to be equipped with a thrust block on the push rod, which can prevent the push rod from being stuck in due to misoperation before transporting and pumping liquid, so that the syringe will self-destruct in advance

Since this type of syringe needs to be installed with a thrust block to prevent premature self-destruction, the structure of the syringe is complicated and the assembly process increases, which is not conducive to mass production

Images