Connector for sampling and adding medicine without needle

Abstract

The invention provides a connector capable of sampling without a needle and feeding medicine, which belongs to the technical field of medical appliance. The connector comprises a sleeve, a sleeve cover and a cushion valve, wherein the sleeve cover is adapted to the upper part of the sleeve; the sleeve is provided with a receiving space; a connecting pipe extends from the lower end of the sleeve; a nozzle of the connecting pipe is communicated with the receiving space; and the cushion valve is accommodated in the receiving space. The connector is characterized in that a positioning plate is formed on the inner wall of the sleeve; the cushion valve seat is formed in the sleeve, and is provided with a cavity of the cushion valve seat; a group of guiding gutters are arranged on the wall body of the cushion valve seat, and are communicated with the nozzle; a retaining nest is arranged on the cushion valve; the positioning plate extends into the retaining nest; the upper end of the cushion valve extends into an opening of the sleeve cover, and the lower end of the cushion valve is accommodated in the cavity of the cushion valve seat. The connector has the advantages that inconsistency of the cushion valve during each deformation can be prevented, the cushion valve can be restored to the original state; nozzle blockage of the cushion valve to the connecting pipe can be avoided, and smooth circulation of liquid can be ensured; and the structure of the connector is simple without complexity.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a needleless sampling and dosing connector. Background technique [0002] The self-evident role of needle-free sampling and dosing connectors is to avoid the pain of needle sticks caused by frequent injections of nutrient solutions and / or medicaments and even frequent sampling and testing during the treatment process. In view of this, infusion On the pipeline connected to the bottle or directly on the patient, pre-set the dosing device through the injection needle (the industry is accustomed to call it a scalp needle), that is, set the needle-free sampling and dosing connector mentioned above (also known as the needle-free dosing connector) . [0003] The structures of needleless sampling and dosing connectors in the prior art are all composed of three parts, for example Figure 5 As shown, it includes a sleeve 1, a cover 2 and an elastic valve 3. A connect...

AI Technical Summary

Problems solved by technology

This structure, when used, exhibits the Figure 8 The technical problem shown is specifically: when the needle seat tube 41 of the syringe 4 squeezes the top of the elastic valve 3, since there are three missing parts in the length direction of the elastic valve 3, an S-shaped deformation occurs, resulting in The liquid inlet of the bypass joint on the casing 1 is blocked, and the nozzle of the connecting pipe 11 will also be blocked, or even tend to be blocked, so that the liquid medicine in the syringe 4 enters the accommodating space 12 and thus the passage from the connecting pipe is blocked

Images