Injection device
By introducing a first positioning rib and guide groove into the injection device, the instability problem of the automatic injection pen during injection is solved, resulting in a more stable needle insertion and injection process and reducing the failure rate.
CN120204532BActive Publication Date: 2026-06-02SUZHOU SENBOMED MEDICAL TECHNOLOGY LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SUZHOU SENBOMED MEDICAL TECHNOLOGY LTD
- Filing Date
- 2025-03-14
- Publication Date
- 2026-06-02
AI Technical Summary
Technical Problem
Existing automated injection pens are prone to malfunctions before and after the injection motion is triggered, leading to instability in the injection process.
Method used
An injection device was designed, including a housing, a piston rod, a guide ring, a trigger element, and an elastic element. By setting a first positioning rib on the inner wall of the trigger element, the rotation of the piston rod is restricted, ensuring the stability of the piston rod during needle insertion. Stable injection motion is achieved through the cooperation of the guide groove and the protrusion.
Benefits of technology
This reduces the failure rate of the injection device during use and improves the stability and reliability of the injection process.
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Smart Images
Figure CN120204532B_ABST
Abstract
The application relates to an injection device, which comprises a casing, a piston rod, a guide ring, a trigger and an elastic member, wherein: the casing can drive the guide ring to push a needle-poking movement of a liquid injection container during injection; the piston rod is used for pushing a piston in the liquid injection container to move; the guide ring is used for performing the needle-poking movement and driving the piston rod to move relative to the trigger; the guide ring is sleeved on the piston rod and is provided with a guide groove for guiding the piston rod to perform an injection movement; the trigger is sleeved on the guide ring and is provided with a trigger structure; the outer periphery of the piston rod is provided with a first protrusion which penetrates the outer wall of the guide ring; the piston rod enters the guide groove of the guide ring through the trigger structure and performs an injection movement under the elastic force of the elastic member; the inner wall of the trigger is further provided with a first positioning rib which is located between the distal end of the trigger and the trigger structure. The technical scheme of the application can reduce the failure rate.
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