Adjustable Secondary Movement in Electronic Pipette
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Solution Overview
Problem
Existing electronic pipettes with motor-operated pistons lack the ability to adjust the length of the secondary movement, which is crucial for optimizing pipetting functions such as direct, reverse, and step pipetting, leading to inefficiencies in liquid aspiration and discharge, particularly in preventing air from entering the liquid and minimizing excess volume disposal.
Innovation Solution
The length of the secondary movement in the pipette is made adjustable, allowing users to optimize it for each pipetting function, ensuring complete discharge and minimizing excess liquid aspiration, through a user interface with setting keys and a display that allows for menu-driven adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the length of secondary movement is fixed, then the device structure is simple, but the pipetting function cannot be optimized for different operations
Solution Approach 1:
The patent implements adjustability of the secondary movement length through the user interface, allowing the device to dynamically adapt its parameters based on different pipetting functions (direct, reverse, step pipetting). This enables optimization of liquid discharge completeness and air prevention for each specific application while maintaining a relatively simple underlying mechanical structure.
2Reliability
If the secondary movement length is increased, then liquid discharge is more complete, but excess liquid aspiration increases
Solution Approach 1:
The patent allows dynamic adjustment of the secondary movement length parameter through the user interface based on the selected pipetting function. For direct pipetting, a longer secondary movement ensures complete discharge. For reverse and step pipetting, the secondary movement can be reduced to minimize excess aspiration. This parameter optimization resolves the contradiction between discharge completeness and excess liquid prevention.
3Measurement precision
If the secondary movement length is adjusted for each pipetting function, then pipetting accuracy is improved, but device complexity increases
Solution Approach 1:
The patent integrates the secondary movement adjustment capability into the existing user interface and control system, allowing a single device to serve multiple pipetting functions (direct, reverse, step) with optimized parameters for each. This multi-functionality approach improves pipetting accuracy across different applications without requiring separate devices or overly complex mechanical modifications.
Data Source
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AI summary
The invention relates to a two-phase electronic pipette, in which the piston can be moved from the basic position to the lower position and in which the distance between basic position and lower position can be changed.