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

my country's research on needle-free injection technology is still in its infancy, and so far only a small number of domestic companies can produce needle-free injectors. Gaps, resulting in inaccurate doses of liquid medicine injected and low precision of liquid medicine doses

2. The dosage adjustment mechanism is prone to slippage, which leads to insufficient dosage of the liquid medicine injected into the patient's body, which does not meet the requirements of the doctor's order and affects the treatment effect of the patient.

3. A separate pressurizer is required to be used with a matching syringe, which is inconvenient to carry when going out

Images