Ophthalmic precise injector

Abstract

The invention discloses an ophthalmic precise injector. The ophthalmic precise injector comprises a jacket and a core rod inserted in the jacket. The core rod is divided into two sections, namely an anterior core rod section and a posterior core rod section. The rear end of the anterior core rod section is connected to the front end of the posterior core rod section through a radial dovetail joint-groove structure. The radial dovetail groove structure includes a shaft rod, a dovetail joint, shaft holes in fit with the shaft rod and a dovetail groove in fit with the dovetail joint. The front end of the anterior core rod section is provided with an annular protrusion that is coaxial to the core rod. An axial section of the annular protrusion is of an arc shape protruding outwardly. The rearend of the posterior core rod section is provided with a press handle for pushing and pulling the core rod. The posterior core rod section is provided with a clamp ring near to the press handle. The ophthalmic precise injector of the invention has good sliding performance and sealing performance, no liquid residue in case of liquid injection, convenient processing and use, high safety and reliability.

Description

technical field [0001] The invention relates to an ophthalmic precision injector, which belongs to the field of medical instruments. Background technique [0002] Currently on the market for disposable syringes, there are two types of seals between the core rod and the jacket. One is to use a plastic core rod to cooperate with the jacket, and the other is to install or combine injection molding ring or sheet on the core rod. The rubber sealing ring cooperates with the jacket to realize. The former has poor sealing and sliding properties due to the combination of plastic and plastic; the latter has a simple structure and a more complicated production process. After the syringe injects the liquid, there will be residual liquid in the syringe jacket and the cone head with these two sealing forms. The low residual syringes on the market can only reduce the residual amount but cannot completely eliminate the residual liquid. The ophthalmic syringe market required a syringe with...

AI Technical Summary

Problems solved by technology

The former has poor sealing and sliding performance due to the combination of plastic and plastic; the latter has a simple structure and a more complicated production process.

After the syringe is injected with liquid, there will be residual liquid in the syringe jacket and the cone head with these two sealing forms. The low residual syringes on the market can only reduce the residual amount but cannot completely eliminate the residual liquid.

Images