Medical injector capable of avoiding waste and achieving constant-speed injection

Abstract

A medical injector capable of avoiding waste and achieving constant-speed injection relates to the technical field of medical treatment and comprises a syringe. A liquid storage cavity is formed in the middle of the syringe; a connecting block is movably connected to the middle of the syringe; a control rod is fixedly connected to the top of the connecting block; a first spring is fixedly connected to the inner wall of the connecting block; a first piston rod is fixedly connected to the right side of the first spring; and a blocking block rotationally connected with the top of the connecting block is fixedly connected to the top of the first piston rod. According to the medical injector capable of avoiding waste and achieving constant-speed injection, through cooperative use of a second piston rod and a rubber sleeve and in an initial state, the second piston rod extends out of a piston block under the action of a third spring, and when the piston block moves to the bottommost part, the control rod continues to move downwards, so that the connecting block moves downwards and drives the second piston rod to move downwards, the rubber sleeve deforms, and a residual liquid medicine inan injection molding nozzle is extruded out, so that the effect of avoiding waste is achieved, and the liquid medicine is completely discharged.

Description

technical field [0001] The invention relates to the technical field of the medical field, in particular to a medical syringe capable of avoiding waste and injecting at a uniform speed. Background technique [0002] Syringe is a common medical appliance. As early as the 15th century, Italian Catinel proposed the principle of syringe, which mainly uses a needle to extract or inject gas or liquid. [0003] During the use of the current syringe, there is often a problem that the liquid medicine in the syringe remains in the injection nozzle, resulting in that the liquid medicine cannot be completely discharged, affecting the effect of the medicine, and during the injection of the medicine, it often causes pain due to too fast injection , causing discomfort to the patient. [0004] Therefore, we propose a medical syringe that can avoid waste and inject at a constant speed to solve the above problems. Through the cooperative use of the piston rod two and the rubber sleeve, the ef...

AI Technical Summary

Problems solved by technology

[0003] During the use of the current syringe, there is often a problem that the liquid medicine in the syringe remains in the injection nozzle, resulting in that the liquid medicine cannot be completely discharged, affecting the effect of the medicine, and during the injection of the medicine, it often causes pain due to too fast injection , causing discomfort to the patient

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