Lancing Device Moving Pivot Depth Adjustment Mechanism
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Solution Overview
Problem
Existing lancing devices lack effective depth control mechanisms to adjust the penetration depth of the lancet, which can affect sample size and user comfort during blood sampling.
Innovation Solution
A depth-control mechanism featuring a pivot post and pivoting link system that allows for adjustable lancet penetration depth by varying the point of contact with the housing and the length between the pivot post and a spring retainer, using a positioning tab and tether to manipulate the lancet carrier's stroke length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a depth-control mechanism is added to adjust lancet penetration depth, then sample size control and user comfort are improved, but device complexity increases
Solution Approach 1:
The patent implements a dynamic depth-control mechanism where a movable stop can be repositioned along the drive mechanism to adjust the lancing stroke depth. This dynamic adjustment capability allows the device to adapt to different penetration depth requirements while maintaining a relatively simple overall structure through the use of a single movable component rather than multiple fixed depth settings.
2Quantity of substance
If the lancing stroke depth is increased to obtain larger blood sample, then sample volume is improved, but user pain and discomfort increase
Solution Approach 1:
The patent employs parameter changes by allowing adjustment of the lancing stroke depth through the movable stop mechanism. Users can select optimal penetration depths based on their individual needs, enabling customization of the balance between sample volume obtained and pain experienced. This parameter adjustment capability resolves the contradiction by allowing users to find the optimal point on the spectrum between sample size and comfort.
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 precise adjustment of the lancet's penetration depth, improving sample size control and minimizing user discomfort by allowing customizable lancing strokes within the lancing device.
Implementation Method 1
a spring positioned within the drive mechanism and biased to propel the lancet carrier along the lancing stroke axis from the charged position to the advanced position
Data Source
AI summary
A depth-control mechanism for selectively-adjusting a lancing stroke depth of a lancet carrier. The depth-control mechanism includes a positioning tab that is configured to be repositioned along an axis that is orthogonal to the lancing stroke axis of the lancet carrier. The depth-adjustment mechanism also includes a tether that is pivotally coupled between the positioning tab and the lancet carrier. The positioning tab is configured to manipulate a pivot axis of the tether to adjust the lancing stroke length of the lancet carrier.