Portable needleless injector with accurate dosage

Abstract

The invention discloses a portable needleless injector with accurate dosage. The portable needleless injector is composed of a thruster, a medicine pumping connector and a dosage medicine tube. The thruster is composed of an upper shell part, an adjusting part, an injection part, a lower shell part and a safety part. A medicine bottle in which liquid medicine is stored is inserted into the medicine pumping connector and is clamped and fixed by the medicine pumping connector. The front end of the dosage medicine tube is connected with the rear end of the medicine pumping connector, and an adjusting hand wheel in the adjusting component is rotated to pump liquid medicine and store the liquid medicine in the dosage medicine tube. During injection, the safety part is opened, the injection partis released, a push rod assembly in the adjusting part is pushed through a thrust spring of the injection part, and then a core rod and a piston in the dosage medicine tube are pushed to act, so thatliquid medicine in the dosage medicine tube forms thin liquid flow and is sprayed out through a spraying hole in the top of the dosage medicine tube. The liquid medicine dosage is accurate; the dosage of the thruster is adjustable, and gear shifting is reliable; the medicine pumping connector is high in adaptability; the liquid medicine injection precision is high; and the portable needleless injector is safe and reliable in use and convenient to carry.

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] For thousands of years, drug therapy has been 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 disadvantage of this injection method is: it is easy to cause local skin damage, bleeding, swelling and pain, etc., and long-term injection will produce subcutaneous nodules and other unfavorable factors; Not only the pain is significant, but also makes 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 ...

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 unfavorable factors; Not only the pain is significant, but most patients (especially infants) have a sense of fear

[0005] 1. There is a gap between the push rod and the medicine tube in the syringe body, and the precision of the medicine liquid dosage is low;

[0006] 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.

[0007] 3. Due to the non-uniform specifications of the drug storage bottles used by the pharmaceutical factory, the adaptability of the drug pumping interface of the needle-free syringe is poor

[0008] 4. A separate pressurizer is required to be used with a matching syringe, which is inconvenient to carry when going out

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