Safety injector needle seat structure

Abstract

The invention discloses a safety injector needle seat structure. The safety injector needle seat structure is different from the prior art in that: a needle seat body consists of an upper needle tube base and a lower locking base; an annular limiting rib is formed on a joint between the upper needle tube base and the lower locking base; the inner cavity of the lower locking base is hollow; the inner wall of the hollow cavity is provided with at least two symmetrically-distributed elastic wings; and a plane is formed on the end face of each elastic wing. A clamp type elastic wing structure is adopted, so that automatic locking of a core bar and a needle seat body can be realized during use, a locking state is stable, a clamping effect is remarkable, and the overall design structure of a component is reasonable; one-time demolding and back full-automatic assembly of the component can be realized, and a product design concept is skillful; due to the adoption of automatic back assembly, the production efficiency of a product is increased effectively, the comprehensive cost of the product is reduced, and the market competitive power of the product is enhanced; and compared with the prior art, the safety injector needle seat structure has the advantages of substantial characteristic and remarkable advancement.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a safety syringe needle seat structure, and in particular to its mechanical connection structure. Background technique [0002] Comparative document 1, patent number: ZL200520016075.5, announcement number: CN2748099, patentee: Danyang Gongchuang Medical Devices Technology Co., Ltd., this case discloses a "safety syringe with automatic needle retraction", including an injection needle Barrel, barrel push rod, needle seat, injection needle tube, O-shaped sealing ring, pressure spring plug, compression spring, sealing rubber ring, injection needle protective cap and piston for protecting the injection needle tube, the injection needle tube is fixed on the In the needle seat, it is characterized in that: the front end of the injection syringe is provided with a fixing device for fixing the needle seat and the compression spring plug, and one end of the needle seat and the fix...

AI Technical Summary

Problems solved by technology

[0005] It is not difficult to see from the above comparative documents that the overall structure of the existing safety self-destructing syringe is relatively complicated. In order to achieve its expected locking function, the locking mechanism is often designed very complicated, and multi-component assembly is required to effectively increase the product. Manufacturing costs, and some parts cannot be demoulded at one time, which increases the difficulty of mold opening, and all parts cannot be automatically assembled at the rear

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