Injector with self-lubricating function

Abstract

The invention discloses an injector with a self-lubricating function, belonging to the technical field of medical instruments. The injector comprises a needle cylinder and a piston, wherein a coatingfilm is fixedly arranged on the outer surface of the piston and / or the inner surface of the needle cylinder, and is a film of which the friction coefficient between the surfaces of the same materialsis less than or equal to 0.2. According to a scheme of the invention, the outer surface of the piston and / or the inner surface of the needle cylinder are / is treated through the film with the frictioncoefficient smaller than or equal to 0.2 between the surfaces of the same materials, so good sealing and lubricating can be achieved through contact matching of the piston and the needle cylinder without the need of using a lubricating agent; and the lubricating agent is completely avoided from being used by the injector, so the problems of introduction of impurities and particles by the lubricating agent and compatibility between the lubricating agent and a drug are solved.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a syringe with self-lubricating function. Background technique [0002] During the use of the syringe, in order to ensure that the medicine and other products can be injected into the human body smoothly, the inner wall of the syringe and the piston need to be lubricated. Simethicone is usually used as a lubricant in the industry. However, some drugs injected by syringes will react with the lubricant to change some properties of the drug, produce suspended lubricant particles, or produce some undesired particles, such as Some protein drugs will react with silicone oil to produce protein aggregation. [0003] At present, the solutions to the interaction between lubricants and drugs in the market are as follows: [0004] 1) Reduce or eliminate the adverse effects of lubricants by reducing the amount of lubricants; [0005] 2) To achieve sealing and lubrication by add...

AI Technical Summary

Problems solved by technology

[0015] In view of this, the object of the present invention is to provide a syringe with self-lubricating function, which can ensure the sealing and lubricity of the syringe product at the same time without using lubricant, and the product completely avoids the use of lubricant, solving the problem of Impurities introduced by lubricants, particulates and compatibility issues between lubricants and drugs

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