Microvalve and drug infusion system

CN122297835APending Publication Date: 2026-06-30MICRO TECH MEDICAL HANGZHOU CO LTD
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Patent Information

Application Number
CN202510411845.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2024-12-30
Filing Date
2025-04-02
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing push-rod drug delivery systems are limited by the space occupied by the push rod during the miniaturization of drug pumps, making it difficult to further reduce the size and affecting safety and wearing comfort.

Method used

By employing microvalve components and controlling multiple extrusion structures through a linkage mechanism, the flow channels can be blocked or opened. Combined with shape memory alloy wire drive, the structure is simplified and integrated into the drug injection system.

Benefits of technology

This system achieves miniaturization and high integration of drug injection systems, enabling easy-to-control drug injection, reducing safety risks caused by accidental contact and collisions, and improving wearing comfort and privacy.

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Abstract

This invention provides a microvalve assembly and a drug injection system, comprising: multiple valve bodies and a linkage mechanism. Each valve body includes: an elastic body serving as a flow channel and a compression structure positioned on the non-flow channel side of the elastic body for driving its movement. The elastic body moves towards the flow channel side under the drive of the compression structure to block the flow channel. The linkage mechanism includes: an actuating element connected to the compression structure and a power element controlling the movement of the actuating element. When the power element actuates, one of the multiple compression structures presses against the elastic body, thereby blocking the flow channel; another of the multiple compression structures moves away from the elastic body, allowing the flow channel to open. Alternatively, when the power element actuates, all of the multiple compression structures press against the elastic body, thereby blocking the flow channel. This invention uses a linkage mechanism to control multiple valve bodies, thus facilitating control and structural integration.
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Citation Information

Patent Citations

  • Single-sided driven patch-type drug infusion device

    CN113117184B

  • Fluid delivery device

    EP1874390B1