A connection structure between the screw sleeve and the injection button of an injection pen.
By designing a barbed structure in the injection pen, the problem of unreliable connection between the injection button and the screw sleeve was solved, achieving a more stable connection effect.
CN224269868UActive 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
In existing injection pens, the contact angle between the injection button and the screw sleeve is improperly designed, causing the button to easily detach from the screw sleeve and resulting in an unreliable connection.
Method used
A first barb structure and a second barb structure are designed between the injection button and the screw sleeve. The connection stability is enhanced by the snap-fit of the barb structure. The angle range of the barb structure is 10°-70° to ensure that the injection button and the screw sleeve maintain a good fit when shaken.
Benefits of technology
The connection stability between the injection button and the screw sleeve has been enhanced, avoiding the problem of the button detaching and improving the reliability of use.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224269868U_ABST
Abstract
This utility model proposes a connection structure between a screw sleeve and an injection button of an injection pen, including a housing, with a front end as the proximal end and a rear end as the distal end. A screw sleeve is fitted inside the housing, and the screw sleeve is fitted with the injection button. The injection button has a first barb structure near the proximal end, and a second barb structure is provided at the corresponding position on the screw sleeve. When the injection button is fitted with the screw sleeve, the first barb structure and the second barb structure engage, thereby ensuring that the injection button remains in good contact with the screw sleeve even when it is shaken, increasing the stability of the connection.
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