Gas spring hybrid needleless injector

Abstract

The invention discloses an air spring hybrid type needleless injector. The outer sleeve is matched in the gun body in a sliding mode, the injection head assembly is installed at the front end of the gun body and used for containing liquid medicine, the liquid medicine rod is installed at the front end of the outer sleeve and used for pushing the liquid medicine in the injection head assembly to be injected under pushing of the outer sleeve, and the inner sleeve is matched in the outer sleeve in a sealing and sliding mode. The push rod is in sealed sliding fit in the inner sleeve and is provided with a gas channel, the locking mechanism is used for locking the position of the outer sleeve relative to the gun body after the outer sleeve moves to a locking position towards the rear end part of the gun body, and an elastic element is arranged between the inner sleeve and the outer sleeve; the rear end of the push rod is provided with a rear one-way valve, and the front end of the inner sleeve is provided with a front one-way valve. The gas spring hybrid action is used as a power source, the gas spring hybrid energy storage operation is completed by compressing the elastic element and gas, needle-free injection is performed by releasing the hybrid energy accumulated by the gas spring, the operation is flexible, and the use is convenient.

Description

technical field [0001] The invention relates to the field of needle-free injectors, in particular to a gas-spring hybrid needle-free injector. Background technique [0002] With the rapid development of science and technology, needle-free syringes have been paid more and more attention in the process of medical treatment and epidemic prevention, and have broad application prospects. The liquid medicine rod in the liquid chamber squeezes the liquid medicine, and forms a high-speed, high-pressure jet flow under the action of the syringe and the injection head, so that the medicine flow penetrates the outer layer of the skin and reaches the subcutaneous and intradermal tissue layers to release the liquid medicine. , medical injection devices that form the effect of drug treatment; needle-free continuous injection devices mainly use the energy stored in gas cylinders and batteries to convert kinetic energy to control, compress and release needle-free injection devices. In daily...

AI Technical Summary

Problems solved by technology

In daily work, it is more necessary to drag an air compressor or carry a heavy gas cylinder or battery on the back to complete the drug injection process on the subject continuously, which seriously affects the convenience of the injection operation; Limited, which makes it frequently replace equipment, increases labor intensity, and affects work efficiency; and it is noisy, and there are also problems such as high-pressure gas and power cord safety hazards

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