A limiting device for setting the maximum single dose of an injection pen

CN224269869UActive Publication Date: 2026-05-26SUZHOU SENBOMED MEDICAL TECHNOLOGY LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUZHOU SENBOMED MEDICAL TECHNOLOGY LTD
Filing Date
2025-01-13
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing injection pens may cause inaccurate drug delivery because the user applies too much force when setting the dosage, resulting in the set dosage exceeding the maximum single dose.

Method used

A limiting device for setting the maximum single dose of an injection pen is designed. By setting a limiting protrusion and a notch for the dose display element on the inner wall of the housing, when the maximum dose is adjusted, the notch abuts against the limiting protrusion, limiting the dose display element from continuing to rotate and preventing the dose from exceeding the maximum single dose.

Benefits of technology

It achieves precise limitation on the maximum single injection dose, preventing the set dose from exceeding the maximum single dose and ensuring the accuracy of injection administration.

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Abstract

This invention proposes a limiting device for setting the maximum single-dose dosage of an injection pen, comprising a housing, with a proximal end at the front end and a distal end at the rear end. A dose display element is spirally connected to the housing. During injection, the dose display element moves towards the distal end along the thread of the housing. During dose adjustment, the dose display element moves towards the proximal end along the thread of the housing. A limiting protrusion is provided on the inner wall of the housing, and a notch is provided on the upper surface of the dose display element. The notch is inclined. When adjusted to the maximum dose, the side of the notch abuts against the side of the limiting protrusion, limiting the continued rotation of the dose display element, thereby limiting the maximum single-dose dosage and preventing the set dose from exceeding the maximum single-dose dosage, resulting in inaccurate single-injection administration.
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