Feedback mechanism and syringe of pen injector

CN121130230BActive Publication Date: 2026-05-26WUXI NEST BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202511419027.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-09-30
Publication Date
2026-05-26
Estimated Expiration
2045-09-30

AI Technical Summary

Technical Problem

Existing pen injectors do not provide timely and clear feedback after injection, making it difficult for patients to know whether the injection has been completed, and posing health risks such as drug backflow, local tissue reaction, and bleeding.

Method used

A feedback mechanism is designed, including a first feedback element, a second feedback element, and a trigger component. By switching the state of the trigger element, the second feedback element strikes the first feedback element at the end of the injection, generating sound and/or vibration signals to ensure that the patient clearly perceives the completion of the injection.

Benefits of technology

When the injection is completed, the feedback device can clearly generate sound and/or vibration signals to ensure that the patient knows that the injection has been completed, thus reducing health risks.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention discloses a feedback mechanism for a pen-type syringe and the syringe itself. The feedback mechanism generates feedback when the syringe completes injection. The feedback mechanism includes a first feedback element, a second feedback element, and a triggering component. The second feedback element and the first feedback element are spaced apart along the axial direction of the pen body, and the second feedback element is slidable along the axial direction of the pen body. The triggering component includes a force-applying element and a triggering element. The force-applying element applies a force to the second feedback element toward the first feedback element, and the triggering element has a first working state that stops the second feedback element from moving toward the first feedback element and a second working state that releases the stop. When the syringe is at the end of the injection, the triggering element switches from the first working state to the second working state, causing the second feedback element to strike the first feedback element under the action of the force-applying element, thereby generating an audible signal and / or a tactile signal. The feedback mechanism of this invention can generate an easily perceptible feedback signal in a timely manner after injection to indicate to the patient that the injection is complete.
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Citation Information

Patent Citations

  • Injection device with voice prompt function

    CN112023185A

  • Two-step type automatic injection device

    CN116688292A