Analysis Kit Positioning Mechanism for Measurement Precision
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Solution Overview
Problem
Existing analysis devices face challenges in accurately positioning analysis kits, which can lead to reduced measurement precision due to improper alignment and potential tilting, affecting the accuracy of component analysis in samples.
Innovation Solution
The solution involves an analyzer with a guide-in section that includes a placement section, a pusher, and contact members with protrusions and notches to securely position the analysis kit vertically and horizontally, along with a tilt detection section using rods to ensure the kit is level, allowing for precise alignment and detection of any tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the chip is not accurately positioned within the analysis device, then the measurement precision of component analysis suffers, but adding complex positioning mechanisms increases device complexity
Solution Approach 1:
The analysis kit includes self-positioning features (protrusions and notches) that automatically align the chip with the guide-in section during insertion. The pusher member automatically pushes the analysis kit against the contact member to achieve precise positioning without requiring manual adjustment or complex automated positioning systems.
Solution Approach 2:
The contact member with protrusions acts as an intermediary between the pusher member and the chip. It translates the pushing force into precise horizontal positioning by engaging with the notches on the analysis kit, simplifying the positioning mechanism while maintaining measurement precision.
2Manufacturing precision
If spring mechanism and datum pins are used for positioning, then z-axis position is controlled, but the structure becomes more complex and harder to manufacture
Solution Approach 1:
The positioning function is segmented between the placement section (supporting from below) and the contact member (constraining from the side). This division allows each component to have a simple, focused structure that is easier to manufacture while collectively achieving precise positioning in multiple directions.
Solution Approach 2:
Instead of using springs to push the chip up from below against datum pins, the design inverts the approach by using a pusher member to push the analysis kit horizontally against a contact member. This inversion simplifies the mechanism by eliminating springs and complex pin arrangements.
3Measurement precision
If tilt detection is added to ensure proper alignment, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The analysis kit's own structure (protrusions and notches) serves the dual purpose of positioning and tilt prevention. The geometric constraints built into the analysis kit automatically prevent tilting during insertion, eliminating the need for separate tilt detection mechanisms while maintaining measurement accuracy.
Data Source
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AI summary
An analysis device (102) employs an analysis kit (42) including a chip (44) provided with a capillary (68) through which a sample flows and a cartridge (46) superimposed on the chip and provided with a liquid reservoir (52). The analysis device includes a guide-in section (120) into which the analysis kit (42) is guided, a placement section (122) on which the analysis kit (42) is placed so as to be supported, a pusher member (128) that pushes the analysis kit (42) from one side face of the analysis kit (42), contact members (140A,140B) that oppose another side face on an opposite side in the horizontal direction to the one side face of the analysis kit (42) placed on the placement section (122), and contact the other side face of the analysis kit (42) being pushed in by the pusher member (128) so as to position the analysis kit (42) in the horizontal direction, and a measurement member (126) that measures a component present in the sample in the analysis kit (42).