Electromagnetic energy storage type needle-free injector

Abstract

The invention discloses an electromagnetic energy storage type needle-free injector, which comprises an electric control device and an impact injection device. The impact injection device comprises a cylinder with an inner cavity, a front end cover fixed at the front end of the cylinder, and a The impact armature set in the cylinder to move in the direction, and the electromagnetic coil fixed in the cylinder to drive the impact armature to move back and forth when energized, wherein the impact armature is electrically stored to a certain extent. It is fired instantly, and the initial acceleration is large, which greatly shortens the empty stroke and reduces the volume of the needle-free syringe. At the same time, the needle-free syringe uses direct current, which can use a safe voltage, making it more convenient and safe to use. The needle-free injector has the advantages of simple structure, small volume, light weight and low manufacturing cost, and can be widely popularized and applied.

Description

technical field [0001] The invention relates to an electromagnetic energy storage type needle-free injector. Background technique [0002] Needle-free injection technology is to inject liquid medicine directly into the body tissues in the form of ultra-fine, high-speed, and straight-line high-pressure jets without the use of needles, which solves a series of problems caused by traditional injections caused by needles piercing the body. , such as: pain, bleeding, infection, tissue damage, psychological stress of patients, etc.; at the same time, the distribution of drugs injected without needles in the tissue is more diffuse, which is conducive to the absorption of drugs, and the skin is not easy to harden after long-term injection. Therefore, needle-free injection technology has broad application prospects, especially for children's vaccination and diabetic patients. [0003] In the prior art, most of the needle-free injectors adopt an electromagnetic-driven structure. Ther...

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Problems solved by technology

[0004] Among the above two driving methods, the former driving method requires a long idle stroke due to the small initial acceleration, while the latter driving method requires a short firing time, even on the level of milliseconds, so it is necessary to realize injection The work required for the process will inevitably lead to a large power of the driving device, and the volume of the injector will also tend to be large. For example, the needle-free injection drive device based on giant magnetostrictive materials only needs about 20kg of giant magnetostrictive materials, and the supermagnetic Stretchable materials are expensive, so needle-free syringes are expensive and the product cannot be popularized

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