Force Sensor Pressing Member Tolerance Compensation
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Solution Overview
Problem
Force sensing devices in portable electronic devices face reduced sensing efficiency due to varying distances between the force sensor and the pressing surface, caused by manufacturing tolerances, which affects the accuracy of pressure detection.
Innovation Solution
Incorporating a pressing member, such as a cantilever spring or embossing-shaped component, that maintains constant contact between the force sensing device's contact blocks and the inner walls of the electronic device, ensuring consistent distance and improved sensing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional force sensing device is used without a pressing member, then the device structure is simpler, but the sensing efficiency is reduced due to varying distances between the force sensor and pressing surface caused by manufacturing tolerances
Solution Approach 1:
A pressing member is introduced as an intermediary component between the force sensor and the pressing surface. This pressing member maintains constant contact with the inner walls of the electronic device, ensuring that the distance between the force sensor and pressing surface remains consistent even when assembly tolerances vary, thereby improving sensing efficiency without significantly complicating the overall device structure
Solution Approach 2:
The pressing member is designed to actively adjust and maintain the distance parameter between the force sensor and pressing surface. By changing the physical state or position of the pressing member in response to assembly variations, the system compensates for manufacturing tolerances and maintains optimal sensing conditions
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 pressing member maintains a consistent distance between the force sensor and the pressing surface, enhancing the sensitivity and accuracy of pressure detection, even with assembly tolerances, thereby improving the overall sensing efficiency.
Implementation Method 1
at least one pressing member protruding outwardly from a second side of the frame... The at least one pressing member may have a shape of a cantilever spring
Data Source
AI summary
A force sensing device includes: a frame; a plurality of contact blocks disposed on a first side of the frame; at least one force sensor disposed between adjacent contact blocks among the plurality of contact blocks; and at least one pressing member protruding outwardly from a second side of the frame, wherein the at least one pressing member is disposed in a region corresponding to one or more of the contact blocks.