Rotator Drive Mechanism for Single-Action Injection Confirmation
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Solution Overview
Problem
Existing medicament delivery devices face challenges in minimizing human errors, requiring multiple actions, and lack confirmation of injection completion, making them unsafe and difficult to use.
Innovation Solution
A drive mechanism with a rotator and needle cover that rotates to engage a plunger rod, featuring an end of injection indication device providing audible, tactile, and visual signals upon completion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the delivery device requires multiple actions to complete injection, then the device can be simpler in structure, but the ease of operation deteriorates and human error risk increases
Solution Approach 1:
The patent combines multiple actions (needle insertion, injection delivery, and completion confirmation) into a single integrated rotator mechanism. The rotator simultaneously drives the needle cover, plunger rod, and indication device, eliminating the need for separate user actions for each function.
Solution Approach 2:
The delivery device performs automatic functions including self-confirmation of injection completion through the indication device. The system automatically tracks injection progress and provides feedback without requiring user intervention to monitor or confirm completion.
2Device complexity
If the delivery device lacks injection completion confirmation, then the device complexity is reduced, but the reliability deteriorates due to increased human error risk
Solution Approach 1:
The patent incorporates an indication device that provides real-time feedback to the user about injection status. The device visually or tactilely signals when the injection is complete, ensuring users receive confirmation without adding significant complexity to the overall system.
3Ease of manufacture
If the delivery device requires multiple discrete actions, then the manufacturing cost can be reduced, but the productivity deteriorates due to longer administration time
Solution Approach 1:
The rotator mechanism is pre-configured with all necessary components (needle cover engagement, plunger rod connection, indication device linkage) before use. This preliminary arrangement allows the injection process to proceed rapidly through a single rotating motion without requiring sequential setup or adjustment steps.
Data Source
AI summary
A drive mechanism for a delivery device is presented, the drive mechanism containing a rotator having an outer surface and an inner surface, the rotator configured to rotate from a first position to a second position. A needle cover having an inner surface that engages the outer surface of the rotator. A rotatable plunger rod having an outer surface configured to engage the inner surface of the rotator. When the rotator rotates from the first position to the second position, the rotatable plunger rod is rotated by the rotator and a plunger rod spring is released from a pre-tensioned state to exert a force on the rotatable plunger rod.