Needleless injection syringe

Abstract

The invention discloses a needleless injection syringe. The needleless injection syringe comprises a cylinder-shaped shell, an injection head and a pneumatic device, wherein the pneumatic device is arranged at the upper part in the shell, a medicine storage tube is arranged at the lower part in the shell, a piston is mounted in the medicine storage tube, the piston is match mounting with the pneumatic device, the exposed end of the medicine storage tube is provided with the injection head, the pneumatic device comprises an air storage bottle, air guide pipes and a mobile plug, the air storage bottle is fixedly mounted in the shell, the outlet of the air storage bottle is connected with a switch device, the outlet of the switch device is connected with one or more air guide pipes, the outlet end (s) of the air guide pipe(s) is / are fixedly mounted on an air hole formed in the mobile plug, and the air hole is a through hole axially communicated along the axis of the mobile plug. The invention aims at providing the needleless injection syringe capable of being used for a plurality of times after being charged with liquid once.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a needle-free injector. Background technique [0002] Needle-free syringes do not need to use needles when injecting drugs, and use the principle of high-pressure jets to make the liquid medicine form a finer fluid, which instantly penetrates the skin and reaches the subcutaneous area. [0003] Needle-free injection can not see the needle, the psychological resistance to treatment will be minimized, and the compliance of treatment will be improved, especially for children with diabetes. Needle-free injection can bring many benefits to diabetic patients, such as greatly reducing the pain caused by needle-based syringes, and avoiding the formation of induration at the injection site after repeated injections. [0004] However, the current needle-free syringes are inconvenient for sequential filling and multiple injections, and the amount of injections cannot be effectively controlle...

AI Technical Summary

Problems solved by technology

[0004] However, the current needle-free syringes are inconvenient for sequential filling and multiple injections, and the amount of injections cannot be effectively controlled, and the number of continuous injections of the existing pneumatic needle-free syringes is relatively small, especially for patients who need long-term repeated use of needle-free syringes at home. Needle syringes, and pneumatic needle-free syringes that are used less frequently, it is troublesome to replace the gas storage cylinder, and it is impossible to determine when to change the gas storage cylinder, many problems will occur during use

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