Microchip Mounting Mechanism for Nucleic Acid Analysis
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Solution Overview
Problem
In nucleic acid analysis apparatuses, pre-heating the heater can lead to premature nucleic acid amplification reactions before analysis begins, causing uncontrollable reaction times and inaccurate results due to misannealing of oligonucleotide primers.
Innovation Solution
A nucleic acid analysis apparatus with a chip holding unit that moves between a first holding position, where the microchip is held in midair, and a second holding position, where it contacts the heating unit, allowing precise control over the reaction start time by coordinating the opening and closing of a hinge-connected structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the heater is pre-heated to a predetermined temperature before analysis is started, then analysis can be started immediately and non-specific amplification reactions can be avoided, but the nucleic acid amplification reaction may start immediately after the microchip has come into contact with the heater, causing the reaction time to be uncontrollable and accurate analysis results to be compromised
Solution Approach 1:
The heater is pre-heated to the reaction temperature before the microchip is mounted, so that when the microchip is placed on the heater, the temperature condition for the reaction is already prepared. This preliminary heating action resolves the contradiction by ensuring the heater is ready to start the reaction immediately upon microchip contact, eliminating delays while maintaining precise reaction time control through the automated mounting mechanism.
Solution Approach 2:
The system uses the act of mounting the microchip itself as the trigger to start the reaction. When the microchip is placed on the heater, the contact between the microchip and heater automatically initiates the heating process, making the mounting action serve dual purposes: positioning the sample and starting the reaction. This self-service mechanism ensures precise reaction time control without requiring separate control systems.
2Productivity
If the heater is pre-heated before analysis, then the reaction can start immediately upon microchip contact, but complex control mechanisms are required to prevent premature amplification and ensure accurate reaction timing
Solution Approach 1:
The mounting of the microchip serves as the self-triggering mechanism that simultaneously positions the sample and initiates the heating process. The contact between the microchip and heater automatically starts the reaction, eliminating the need for complex control systems, sensors, or additional actuators to detect when the microchip is in place. This simple self-service approach maintains high productivity while avoiding device complexity.
Solution Approach 2:
The mounting operation and reaction start trigger are merged into a single action. The physical act of placing the microchip on the heater combines two functions: sample positioning and reaction initiation. This merging of functions eliminates the need for separate control mechanisms, reducing device complexity while maintaining efficient analysis throughput.
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
This configuration enables precise control over the reaction start time, preventing premature amplification and ensuring accurate, reproducible analysis results without complex configurations or controls.
Implementation Method 1
a heating unit configured to apply heat by contacting a microchip
Data Source
AI summary
There is provided a nucleic acid analysis apparatus including a heating unit configured to apply heat by contacting a microchip, and a chip holding unit configured to change a position between a first holding position that holds the microchip in midair and a second holding position that holds the microchip in contact with the heating unit.