Biosensor Insertion Device with Automatic Needle Retraction
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Solution Overview
Problem
Conventional insertion devices for biosensors require a two-action operation, leading to potential discomfort if the plunger is not promptly released, as the piercing member remains inserted into the host.
Innovation Solution
An insertion device utilizing pre-compressed elastic members for automatic insertion and retraction, allowing a single-action operation with the insertion seat driven by the first elastic member and the retraction seat by the second elastic member, completing the insertion and retraction within 100 milliseconds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a two-action operation is used for insertion and retraction, then the device can be controlled manually, but the host experiences discomfort if the plunger is not promptly released
Solution Approach 1:
The first pre-compressed elastic member is pre-loaded in the insertion device. When the trigger is actuated, this pre-compressed elastic member immediately drives the piercing member into the host and then automatically retracts it, eliminating the need for the operator to manually control the retraction phase and ensuring rapid completion of the procedure
Solution Approach 2:
The second pre-compressed elastic member is configured to automatically drive the retraction seat to retract the piercing member from the host after insertion. This self-service mechanism ensures that retraction occurs automatically without requiring additional manual intervention, thereby preventing host discomfort from prolonged insertion
2Loss of time
If automatic insertion and retraction are implemented using pre-compressed elastic members, then the operation time is reduced to 100 milliseconds, but the device complexity increases
Solution Approach 1:
The insertion device employs a nested structure where the retraction seat is positioned within the insertion seat, and both are integrated into the main body housing. The pre-compressed elastic members are nested within the structural components, allowing automatic insertion and retraction mechanisms to be compactly arranged without significantly increasing the overall device footprint or operational complexity
Solution Approach 2:
The device is segmented into distinct functional modules: an insertion seat for holding the piercing member, a retraction seat for controlling retraction, and housing structures that guide movement. This segmentation allows each component to perform its specific function efficiently, reducing the time required for insertion and retraction operations
3Ease of operation
If the piercing member remains inserted in the host until plunger release, then manual control is maintained, but the procedure efficiency decreases
Solution Approach 1:
The device utilizes periodic action through pre-compressed elastic members that store potential energy and release it in controlled sequences. The first elastic member provides the insertion impulse, followed by the second elastic member providing the retraction impulse, creating a rapid periodic cycle that completes both insertion and retraction within 100 milliseconds, dramatically improving procedure efficiency
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables a smooth, single-action operation for inserting and retracting the biosensor needle, reducing user effort and host discomfort by automating the process, and ensuring quick needle insertion and removal.
Implementation Method 1
a first pre-compressed elastic member having two opposite ends that respectively abut against the insertion seat and the cover body
Implementation Method 2
a second pre-compressed elastic member having two opposite ends that respectively abut against the insertion seat and the retraction seat
Data Source
AI summary
An insertion device includes a cover body, an insertion module. The insertion module is disposed in the cover body, and includes a main body, an insertion seat, a first elastic member, a retraction seat and a second elastic member. When the cover body is depressed, the insertion seat is driven by the first elastic member to perform an automatic-insertion operation and to collapse a limiting structure between the insertion seat and the cover body. A limiting structure between the insertion seat and the retraction seat collapses upon the collapse of the limiting structure between the insertion seat and the cover body, so that the retraction seat is driven by the second elastic member to perform an automatic-retraction operation.