Pneumatic needleless injector

Abstract

The invention relates to the technical field of injectors, in particular to a pneumatic needleless injector. The pneumatic needleless injector comprises a cylinder and a needleless medicine storage tube installed at the front end of the cylinder and used for containing an injection or vaccine. An end cover is arranged at the tail end of the cylinder. A power cavity used for storing a small disposable pressure storage steel bottle, a control device used for controlling the injector to work, an energy storage cavity, a middle cover, a sealing damping device, a piston and a piston push rod are sequentially arranged in the cylinder from the tail end to the front end. A rubber piston is connected to the piston push rod and located in the needleless medicine storage tube. The control device comprises a button switch, a valve body, a valve element and a spring, and a safety device is arranged on the button switch and used for preventing misoperation of a user. In the injection process, the safety device is removed, the switch is pressed, and then injection operation can be carried out. The pneumatic needleless injector has the advantages that the structure of a triggering and pushing device is greatly simplified, operation is convenient, cost is low, injection efficiency is high, and reliability is high.

Description

technical field [0001] The invention relates to the technical field of syringes, in particular to a pneumatic needle-free syringe. Background technique [0002] The traditional syringe is an injection method that injects medicine into the human body through a stainless steel needle. This injection method can easily cause local skin damage, bleeding, swelling and pain, etc., which not only causes significant pain, but also causes most patients (especially infants) Fear, and the risk of infection at the injection site. Needle-free injection technology uses the principle of high-pressure jets to make the liquid medicine form a thinner liquid flow, which instantly penetrates the skin and reaches the subcutaneous area. Because of the change in the injection principle, the liquid medicine is diffused and distributed under the skin, with faster onset time and higher drug absorption rate. , can completely avoid the above problems. [0003] According to incomplete statistics, dozen...

AI Technical Summary

Problems solved by technology

[0004] At present, the types of needle-free syringes on the market are relatively single, mainly needle-free syringes for insulin injection, and the driving power is mainly spring power, but there is still a certain gap in injection quality compared with foreign manufacturers' equipment, and the price is relatively low. high

[0005] The main reasons for the current low acceptance rate of needle-free syringes in the market are: the price of syringes is too expensive, and the price / performance ratio is too low for the general public; the performance factor of the power spring leads to insufficient injection pressure, and the injection cannot be performed as expected, and the injection is reliable. sex without a better guarantee

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