Short-course precession preassembling dosing instrument

Abstract

The invention discloses a short-course precession preassembling dosing instrument which comprises a dosing barrel, dosing double needles, a rotating sleeve and a guiding part. A guiding spiral groove is arranged on the inner wall of the dosing barrel, and the rotating sleeve extends into the dosing barrel to be in axial-fixing and radial-rotatable sealing matching with the dosing barrel. A guiding through groove is axially arranged on the lateral wall of the rotating sleeve, the guiding part is arranged in the rotating sleeve, and a guiding sleeve is arranged on the outer wall of the guiding part and penetrates through the guiding through groove and extends into the guiding spiral groove. When the short-course precession preassembling dosing instrument is used, a medicine container and the dosing double needles are in a sealing state by means of a membrane and the rotating sleeve in an interface, and thorough sterility in transportation and storage can be achieved. The guiding part is driven to move rapidly downwards 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 dosing instrument for mixing medicines. 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, one tip of ...

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