Needleless injector based on piezoelectric conversion and using method of needleless injector

Abstract

The invention discloses a needleless injector based on piezoelectric conversion and a using method of the needleless injector. The needleless injector comprises a handle part, a medicine suction part, a piston driver part, a medicine administration part and a control circuit part, wherein both the piston driver part and the control circuit part are arranged in a cavity of the handle part. The medicine suction part is arranged at the front end of the handle part; and the medicine administration part is arranged at the front end of the medicine suction part. The using method comprises the following steps: inserting a medicine bottle in a medicine suction needle head in the medicine suction part, and discharging air in a runner in the injector; controlling a piezoelectric type micro-displacement amplification mechanism to shrink by virtue of the control circuit part, so that medicine liquid in the medicine bottle flows to a hollow region of the medicine suction part under the action of atmosphere; and after completing medicine suction, controlling the piezoelectric type micro-displacement amplification mechanism to extend by virtue of the control circuit part so as to drive a piston to move towards the medicine administration part, so that the medicine liquid in the hollow region of the medicine suction region jets outwards by virtue of the medicine administration part under the action of the piston. The needleless injector disclosed by the invention is free from generation of blasting noise, and the needleless injector is precise in control and small in volume.

Description

technical field [0001] The invention relates to the research field of needle-free injectors, in particular to a needle-free injector based on piezoelectric conversion and a use method thereof. Background technique [0002] In order to overcome the shortcomings of many drugs at home and abroad, such as the difficulty of direct oral administration, poor drug stability and poor effect, etc., at present, professional medical staff use syringes with stainless steel needles to administer drugs in liquid form. Since the needle will invade the human body, if it is not handled properly, it will often induce infection or cause cross-infection, and the risk of spreading severe infectious diseases is extremely high. Therefore, the issue of injection safety has become the focus of global clinical infection control. [0003] In recent decades, researchers have proposed a needle-free injection technology, which is a unique method of transdermal drug delivery. High-speed, high-pressure je...

AI Technical Summary

Problems solved by technology

However, the recovery force of the compression spring and the pressure of the high-pressure gas are given by the needle-free injector system itself, and it is difficult to adjust it for different human and animal skin characteristics

At the same time, needle-free injectors powered by springs and high-pressure gas have extremely uncomfortable popping noises that may cause severe local irritation

In addition, the common needle-free syringes on the market can only inject one kind of medicinal liquid at the same time. For people and animals who need to inject two or more medicinal liquids, they can only wait for the first medicinal liquid to be injected and re-inhale the second medicinal liquid. Re-injection of two kinds of medicinal liquid, or using two needle-free syringes for injection at the same time, has the problems of low efficiency and high cost

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