A syringe capable of continuous metered injection

By designing a multi-module rotatable push rod and an elastic limiting block structure, the problem of existing syringes being unable to quickly switch between quantitative and continuous injection modes has been solved, achieving efficient and accurate micro-injection and reducing operational complexity and cost.

CN122141068APending Publication Date: 2026-06-05LIAONING YINYI BIOTECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LIAONING YINYI BIOTECH CO LTD
Filing Date
2026-05-08
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing syringes cannot simultaneously achieve rapid switching between high-precision single-dose injection and continuous injection modes, and their operation is cumbersome, resulting in poor dosage control accuracy and limited functionality.

Method used

Design a syringe capable of continuous quantitative injection. It adopts a multi-module rotatable push rod structure, which allows switching between single quantitative injection mode and continuous push-pull injection mode by rotating the push rod. Combined with the elastic limit block and the one-way meshing structure of the rack and pinion, it achieves precise control of the single injection dose, and the mode can be quickly switched by the detachable limit device.

Benefits of technology

It achieves a single switching operation time of ≤1 second, significantly simplifies the operation process, improves the efficiency of working mode switching, reduces the risk of drug contamination and consumable costs, meets the requirements of 0.01ml-level micro-volume high-precision drug delivery, and ensures the continuity and accuracy of the injection process.

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Abstract

The application discloses a syringe capable of continuous quantitative injection and belongs to the technical field of medical devices. The syringe is provided with a multi-module rotatable push rod structure, and a quantitative push module and a continuous push module are arranged on the outer circumferential surface of the push rod in a circumferential direction. The single quantitative injection mode and the continuous push-pull injection mode can be switched by rotating the push rod, and the time consumed for single switching operation is less than or equal to 1 second. Compared with the prior art, the working mode switching efficiency of the syringe is improved by more than 80%, the operation process between medicine drawing and injection is significantly simplified, and the risk of liquid medicine pollution and the waste of consumables caused by complicated operation are avoided.
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