一种胰岛素注射笔的注射发声结构及注射结构
By using a rigid connecting sleeve in the insulin pen in conjunction with elastic teeth and annular serrated surfaces, the problems of inconvenient assembly and insufficient reliability of the injection sound-generating structure are solved, resulting in clear injection feedback, structural stability, and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- KENDO TECH (ZHEJIANG) CO LTD
- Filing Date
- 2025-03-14
- Publication Date
- 2026-07-17
AI Technical Summary
The existing insulin pen injection sound-generating structure is poorly designed, resulting in inconvenient assembly, insufficient reliability after assembly, unclear sound feedback, and easy deformation or failure of the structure during long-term use.
The rigid connecting sleeve, in conjunction with the elastic teeth on the outer wall of the drive tube and the annular serrated surface on the inner wall of the injection pen body, forms an injection sound-generating structure. The main body shell and the drug cartridge are connected by a snap-fit method to ensure structural stability and sound clarity. At the same time, the transition parts are eliminated to improve assembly convenience and reliability.
It provides clear injection sound feedback, which improves the ease of assembly and the reliability of the structure, extends the service life, and avoids structural deformation or failure caused by long-term use.
Smart Images
Figure CN224506025U_ABST
Abstract
Claims
1. An injection sound structure of an insulin injection pen, characterized in that, include: The injection pen itself; The pen body is equipped with a drive tube and a screw. The drive tube is disposed inside the pen body, and the screw is disposed inside the drive tube. The rotation of the drive tube drives the screw to rotate and pushes the stopper inside the medicine bottle forward to perform the injection action. The outer wall of the drive tube is provided with outwardly protruding elastic teeth, and the inner wall of the injection pen body is provided with an annular thorn surface. The elastic teeth and the annular thorn surface cooperate to form an injection sound-generating structure. During the injection process, the drive tube rotates and drives the elastic teeth to rotate along the annular thorn surface, and the elastic teeth contact the annular thorn surface to produce sound.
2. The injection sound generating structure of an insulin injection pen according to claim 1, characterized in that, The injection pen body includes a main shell, a connecting sleeve, and a drug cartridge. The upper and lower ends of the connecting sleeve are respectively fastened to the main shell and the drug cartridge.
3. The injection sound generating structure of an insulin injection pen according to claim 2, characterized in that, The annular serrated surface is disposed on the inner wall of the connecting sleeve.
4. An injection structure of an insulin injection pen, having the injection sound generating structure of the insulin injection pen according to any one of claims 1 to 3, characterized in that, Also includes: A dosing cylinder is disposed inside the main body housing and the two are threadedly connected; A transmission tube is disposed inside the dosage drum and the two are connected in a disengaging manner; the drive tube is disposed inside the transmission tube. During the injection process, the transmission tube is pressed down and engaged with the dispensing surface between it and the dosing cylinder. At this time, the transmission tube and the dosing cylinder rotate and move downward synchronously. The rotation of the transmission tube drives the drive tube and the screw to rotate in sequence. The screw pushes the stopper in the medicine bottle forward to perform the injection.
5. The injection mechanism of an insulin injection pen according to claim 4, characterized in that The transmission tube has downward protruding dose-dispensing teeth, and the dose-dispensing cylinder has upward protruding transmission tube teeth. The dose-dispensing teeth and the transmission tube teeth work together to form the engagement surface.
6. The injection structure of an insulin injection pen according to claim 4, wherein The inner wall of the transmission tube is provided with guide ribs along its axial direction, and the outer wall of the drive tube is provided with guide grooves, with the guide ribs embedded in the guide grooves.
7. The injection structure of an insulin injection pen according to claim 4, wherein The cross-section of the inner wall of the drive tube and the cross-section of the screw are both set in a waist-drum shape and are connected together.
8. The injection structure of an insulin pen according to claim 4, characterized in that, The connecting sleeve is provided with an integrally connected threaded seat, the screw passes through the threaded seat and the two are threadedly connected, and the end of the screw near the medicine tank passes through the threaded seat and is connected to a piston pusher.
9. The injection mechanism of an insulin injection pen according to claim 8, characterized in that The inner wall of the connecting sleeve is also provided with at least one pair of arc-shaped baffles, and there is a distance between the arc-shaped baffles and the threaded seat to form a rotation space.
10. The injection mechanism of an insulin injection pen according to claim 9, characterized in that The arc-shaped baffle has a limiting protrusion, and the end of the drive tube is provided with a ring-shaped limiting stop. The limiting stop is located in the rotation space between the arc-shaped baffle and the threaded seat, and the limiting protrusion and the limiting stop are engaged vertically.