Needleless connection piece

Abstract

The invention discloses a needless connection piece. The needless connection piece comprises a needless connector and a rubber plug, wherein the needless connector comprises an access port, an output port and a cavity with an inner cavity, an inner core seat is arranged in the inner cavity, the rubber plug comprises a solid portion and a hollow portion, at least one groove is formed in the side wall of the solid portion, at least one rib used to increase elastic recovery ability of the hollow portion is arranged in the hollow portion, the rubber plug is arranged in the inner cavity of the needless connector, the solid portion and the access port of the needless connector form a seal structure, and the hollow portion is installed in the inner core seat in connection mode. According to the needless connection piece, the at least one rib used to increase the elastic recovery ability of the hollow portion is arranged on the inner wall of the hollow portion. The needless connection piece has strong resilience force, guarantees positive pressure, enables the rubber plug to have enough mechanical strength, uses the guiding rib which is in S shape and has strong resilience force, enables the guiding rib to limit the deformation direction of the rubber plug, and prevents the rubber plug from jamming in the inner cavity.

Description

technical field [0001] The invention relates to a needleless connector, in particular to a needleless connector with reliable plugging, precise closure, rapid and smooth deformation recovery, and a return guide track. Background technique [0002] When long-term repeated infusion is required in the course of intravenous infusion therapy, the intravenous indwelling needle or indwelling catheter that enters the human vein is generally connected to the medical liquid injection equipment through a joint, so as to realize operations such as dosing. [0003] Traditional joints with latex diaphragms have limitations, and need to be needled to achieve dosing. After the latex diaphragm is pierced by the needle, the pollutants and rubber debris from the needle will enter the liquid medicine and enter the human body with the liquid medicine, thus giving The health of patients poses a great safety hazard. [0004] In the prior art, there are many different needleless connectors that us...

AI Technical Summary

Problems solved by technology

[0003] Traditional joints with latex diaphragms have limitations, and need to be needled to achieve dosing. After the latex diaphragm is pierced by the needle, the pollutants and rubber debris from the needle will enter the liquid medicine and enter the human body with the liquid medicine, thus giving Patient health poses a great safety hazard

[0004] In the prior art, there are many different needleless connectors that use rubber plugs as the inner core, but the rubber plugs are soft, have low mechanical strength, and slow elastic recovery speed. During the recovery process of the rubber plugs, it is easy to cause bacterial invasion etc., and the track of rubber plug deformation under pressure is not fixed, it is easy to cause the rubber plug to be stuck in the inner cavity, resulting in damage to the needleless connector.

There are also improved rubber plugs, which use wave-shaped rubber plugs. The manufacturing of wave-shaped rubber plug molds is complicated. It requires strict control of production process parameters and material ratios to achieve good elasticity and positive pressure. Requirements for materials and production processes high production costs

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