Safe needleless injector with externally-displayed dosage

Abstract

The invention discloses a safe needleless injector with externally-displayed dosage. The safe needleless injector is composed of a front injection cylinder part, a pressurizing and quantity-adjustingpart, a rear injection cylinder part and an injection safety part. The front injection cylinder part, the pressurizing and quantity-adjusting part, the rear injection cylinder part and the injection safety part are formed by processing metal aluminum materials through a numerical control machine tool. The front half part of the pressurizing and quantity-adjusting part is screwed into the front injection cylinder part, the rear half part of the pressurizing and quantity-adjusting part is connected with the rear injection cylinder part through a clamping position and a screw, and the injection safety part is screwed at the tail end of the rear injection cylinder part. When in use, the dosage medicine tube is clamped and fixed at the front end of the front injection cylinder part in a gaplessmanner; then, the injection cylinder part completes pressurizing and gear engaging after rotating rightwards, and the injection cylinder part completes dose adjustment and medicine suction after rotating leftwards; a safety cover of the injection safety part is taken down, an injection key is pressed, the spring releases thrust, the piston in the dosage medicine tube is driven to act, and liquidmedicine is rapidly injected into the human body. The injector is safe to use, long in service life, intuitive in operation and labor-saving.

Description

technical field [0001] The invention relates to a needle-free injector, in particular to a needle-free injector with simple structure, safe use, accurate operation and long service life. 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...

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)

Although domestic needle-free syringes are cheaper than imported needle-free syringes, for ordinary consumers (patients), the penetration rate of domestic needle-free syringes is still relatively low. R&D costs are high and prices are relatively high

The structure of domestic needle-free syringes is complex, because the main parts are made of plastic materials, and a needle-free syringe is composed of dozens of parts. Therefore, dozens of molds need to be opened, and the initial research and development costs are high. high price

2. Short service life

Since domestic needle-free syringes are made of plastic, long-term and frequent use will cause large wear and tear on components and short service life

3. The dose display is not obvious, the operation is inaccurate, and the dose is inaccurate

Due to the fact that the plastic shell of the current domestic needle-free syringe is too smooth, it is easy to slip during operation, resulting in inaccurate operation when rotating and adjusting the dose; in addition, due to the large wear of the plastic device, the selected dose is also inaccurate

In particular, the dose display window of domestic needle-free syringes is small, and elderly patients often cannot see clearly. When choosing the dose, it is easy to choose the wrong dose.

4. Product replacement is slow

Since domestic needle-free syringes are made of plastic, the production volume of molds is large, the cost of product replacement is high, and the speed of replacement is slow

Images