Lancing Device Depth Control and Lancet Ejection Mechanism
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Solution Overview
Problem
Existing lancing devices lack effective depth-adjustment mechanisms, ejection systems, and guidance systems, leading to inconsistent penetration depths and user discomfort during blood sampling.
Innovation Solution
The lancing device incorporates a depth-control mechanism with a dial and linkage system for adjustable penetration depth, an ejection mechanism using a flared flange or recess for easy lancet removal, and a guidance mechanism with an inner housing to constrain the lancet's linear path, enhancing user control and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a depth-control mechanism with dial and linkage is added, then penetration depth control precision is improved, but device complexity increases
Solution Approach 1:
A linkage mechanism serves as an intermediary between the dial and the lancet carrier, converting rotational motion into linear displacement to control lancet depth. This intermediary component enables precise depth control while maintaining a relatively simple overall structure by mediating the interaction between the control interface and the actuated component.
2Productivity
If an ejection mechanism with abutment member is added, then lancet ejection efficiency is improved, but device complexity increases
Solution Approach 1:
The ejection mechanism utilizes the existing drive mechanism and spring system to automatically eject the used lancet when the drive mechanism is actuated. The abutment member is positioned to engage with the lancet body during the normal lancing operation, and the ejection force is generated by the same spring that propels the lancet, eliminating the need for a separate ejection power source and reducing overall device complexity.
3Stability of the object's composition
If a guidance mechanism with inner housing is added, then lancet path stability is improved, but device complexity increases
Solution Approach 1:
The guidance mechanism is segmented into an inner housing that moves with the lancet carrier and an outer housing that remains stationary. This segmentation allows the inner housing to provide real-time guidance and constraint on the lancet path during movement, while the outer housing provides structural support and mounting for the entire mechanism. The segmented design enables effective path control without requiring a monolithic complex structure.
Data Source
AI summary
A lancing device and lancet are provided with depth-control, lancet ejection, and/or guidance mechanisms. The depth-control mechanism includes a dial rotationally mounted at a distal end of the housing of the lancing device, the dial being coupled to a linkage whereby rotation of the dial imparts translational movement to a stop surface of the linkage to limit the stroke of the lancet and thereby control lancing penetration depth. The ejection mechanism includes an ejector that is advanced into contact with a transversely flared flange of the lancet to discharge the lancet from the lancing device. The guidance mechanism includes an inner guidance housing for restricting out-of-axis movement of a lancet carrier.