Magnetic Latching Carriage for Assay Device Alignment
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Solution Overview
Problem
Existing medical diagnostic test kits face challenges in achieving precise alignment of assay devices with reading elements, leading to inaccuracies due to manufacturing variations, potential contamination, and wear-related issues, which affect the reliability and accuracy of test results.
Innovation Solution
A reader system with a carriage and magnetic means for precise latching of the assay device at predetermined positions, combined with optical alignment features to ensure accurate positioning and minimize wear, allowing for repeatable and accurate detection of analytes in samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-loaded mechanism with sharp edges is used to latch the test stick, then the test stick can be securely held in position, but wear and contamination occur due to friction against sharp edges
Solution Approach 1:
The patent replaces the mechanical spring-loaded button system with a magnetic field-based latching mechanism. The magnetic field provides the necessary holding force without physical contact, eliminating friction and wear against sharp edges while maintaining secure positioning of the test stick.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the latching mechanism and the test stick. This magnetic intermediary transmits the holding force without requiring direct mechanical contact, thereby preventing wear and contamination while achieving reliable latching.
2Ease of operation
If a pivoting movement mechanism is used to insert the test stick, then the test stick can be inserted with some force, but wear occurs due to friction over repeated use
Solution Approach 1:
The patent eliminates the pivoting movement mechanism by using a magnetic field to guide and latch the test stick in a straight linear insertion path. The magnetic field provides attractive force that draws the test stick into position without mechanical pivoting, reducing friction and wear.
3Reliability
If spring-loaded buttons are used to engage the test stick, then the test stick can be held firmly, but the mechanism adds complexity and potential failure points
Solution Approach 1:
The patent replaces the complex mechanical spring-loaded button system with a simpler magnetic field-based latching mechanism. The magnetic field provides firm engagement through magnetic attraction without requiring mechanical springs, buttons, or linkages, thereby reducing device complexity while maintaining reliable engagement.
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
The solution provides extreme accuracy in positioning the assay device, reduces wear-related contamination, and enhances the reliability of test results by ensuring precise alignment and minimizing friction, thus improving the longevity and accuracy of the test apparatus.
Implementation Method 1
magnetic means for latching the carriage onto the reader within said cavity at a predetermined reading position
Data Source
Figure 1
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Figure 2B
AI summary
A connection assembly for a test device comprises a carriage for receiving at least a portion of a test device and a receptacle for co-operation with the carriage. The carriage is longitudinally movable with respect to the receptacle and is latchable to the receptacle at a predetermined position.