Needleless injector

Abstract

The invention provides a needleless injector. The needleless injector is composed of a dosage medicine tube and a thruster, wherein the thruster is composed of an upper shell component, an adjusting compression component, an unlocking injection component and a lower shell. The rear end of the dosage medicine tube is in threaded connection with the front end of the upper shell component of the thruster, and a piston push rod in the dosage medicine tube is in gapless clamping connection with a spring pull rod of the upper shell component of the thruster; the adjusting compression component is screwed into the upper shell component through rectangular threads; the lower shell is fixed at the tail part of the adjusting compression component through self-tapping screws; and the unlocking injection component is clamped and fixed at the rear end of the lower shell. The needleless injector of the invention has the advantages that: a gapless clamping connection design is adopted for the dosagemedicine tube, so high dosage precision of an injected liquid medicine is ensured; a dosage adjusting function, a pressurizing function and a medicine pumping function are integrated, so the needleless injector is more convenient to use and convenient for taking out; and unlocking and injection are integrally designed, so safety is ensured, and operation is convenient.

Description

technical field [0001] The invention relates to a needle-free injector, in particular to a needle-free injector with accurate dosage and portability. The invention belongs to the technical field of medical equipment. Background technique [0002] Drug therapy is the main way of human medical treatment. Drugs enter the human body in two main ways: oral administration and injection. The traditional injection method is needle injection, that is, the drug is injected into the human body through a stainless steel needle. The disadvantages of this injection method are: it is easy to cause local skin damage, bleeding, swelling and pain, etc., and long-term injection will produce subcutaneous nodules and other adverse conditions; not only Pain is significant, and most patients (especially infants) have a sense of fear. [0003] Needle-free injection is a newly developed technology in recent years. It uses the principle of high-pressure jets to make the liquid medicine form a thin...

AI Technical Summary

Problems solved by technology

The traditional injection method is needle injection, that is, the drug is injected into the human body through a stainless steel needle. The disadvantages of this injection method are: it is easy to cause local skin damage, bleeding, swelling and pain, etc., and long-term injection will produce subcutaneous nodules and other adverse conditions; not only Significant pain and frightening for most patients (especially infants)

[0004] At present, needle-free injection has been gradually applied to clinical medicine and family health care in developed countries, but the price is relatively expensive

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