Pushing device used on screw-in preloaded dosing device

Abstract

The invention discloses a thrust unit used on a precession preassembling type dosing instrument. The thrust unit comprises a guiding sleeve I, a rotating sleeve and a push rod, wherein the guiding sleeve I is coaxially arranged with the rotating sleeve, the guiding sleeve I and the rotating sleeve form axial fixing matching, and the push rod is arranged in the axial direction of the guiding sleeve I and moves axially along the guiding sleeve I driven by rotating sleeve. When the thrust unit is used, a medicine container and the dosing double needles are in a sealing state by means of a membrane in an interface and the rotating sleeve with one end sealed, and thorough sterility in transportation and storage can be achieved. The push rod is driven to move rapidly downwards along a spiral groove and push the medicine container by rotating the rotating sleeve, upper needle points of the dosing double needles puncture a sealing plug on the medicine container, and the lower needle points of the dosing double needles puncture the membrane in the interface, so that the medicine container is instantly communicated with a transfusion container, and therefore, sterile sealing in the whole processes of transportation, storage, butt jointing, medicine mixing and transfusion is achieved.

Description

technical field [0001] The invention relates to a medical device, in particular to a pushing device used on a medicine dosing instrument. Background technique [0002] In order to add the medicine in the medicine container to the solution in the infusion container (i.e. infusion soft bag or infusion soft bottle), and then infuse the mixed solution into patients in clinical institutions such as hospitals. In the prior art, a drug dosing instrument is often used to connect the drug container with the infusion soft bag or the infusion soft bottle. [0003] The dosing instrument in the prior art mainly includes a dosing cylinder and a dosing double needle, the dosing cylinder forms a cup-shaped structure, and the dosing needle is stuck in the dosing barrel through the double needle support seat, in order to seal the dosing channel , there is a septum on the cross-section of the inner wall at the bottom of the cartridge, and a sealing film is provided on the top of the cartridge...

AI Technical Summary

Problems solved by technology

[0004] The drug dosing instrument with the above structure mainly has the following disadvantages in the drug mixing process: when the drug container is stuck into the drug feeding cartridge, the sealing film on the top of the drug feeding cartridge must be torn off first, and the drug feeding cartridge will be broken when it is inserted. Contact with the outside world, thereby causing pollution

And all the closed dosing instruments that appear in the prior art can only realize the airtightness in the mixing process, but cannot realize the "whole process aseptic airtightness" during the docking of the vial and the dosing instrument, the mixing of medicines and the infusion. "

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