Force Detector Circuit Board Hole Convex Part Design
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Solution Overview
Problem
Existing force detectors in industrial robots face challenges in downsizing while maintaining accuracy, as the circuit board between the substrates acts as a buffer, dispersing the applied force and reducing the precision of force detection.
Innovation Solution
A force detector design with a circuit board placed between the substrates, featuring a hole for the element and convex parts on the substrates to sandwich the element, preventing force dispersion and ensuring accurate force detection by applying external forces directly to the element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the circuit board is placed between the substrates to downsize the detector, then the detector size is reduced, but the force applied to the element is dispersed and detection accuracy is lowered
Solution Approach 1:
The circuit board is segmented by forming a hole at the element placement location, separating the board into regions that allow direct force transmission paths from the pressing plate through the element to the counter pressing plate, bypassing the circuit board material that would otherwise disperse the force
Solution Approach 2:
The circuit board material is extracted (removed) from the critical force transmission zone by forming a hole, eliminating the harmful buffering effect of the circuit board material at the element location while retaining the circuit board's structural support and electrical connection functions
2Device complexity
If the circuit board is placed between the substrates, then the detector may be downsized, but the circuit board serves as a buffer and disperses the force applied to the element
Solution Approach 1:
The circuit board is segmented into regions with and without material presence, creating a hole at the element location to allow concentrated force transmission while maintaining board integrity for structural support and electrical connections in other areas
Solution Approach 2:
The circuit board material is selectively removed from the element placement zone, extracting the harmful buffering function from that specific location while preserving the circuit board's necessary functions elsewhere in the detector structure
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 allows for higher accuracy in force detection, enabling precise force measurement in both positive and negative directions, while also reducing the size of the detector and improving its reliability and manufacturing efficiency.
Implementation Method 1
the element is pressurized. When an external force is applied to the substrates, the pair of substrates are relatively displaced, and a force acting between the pair of substrates is detected by the element. In the force detector using the element having the crystal disc, deformation of the crystal disc due to the external force is converted into a voltage and output
Data Source
AI summary
A force detector includes a first substrate, a second substrate, a circuit board provided between the first substrate and the second substrate, and an element mounted on the circuit board and outputting a signal in response to an external force, wherein a hole is formed in the circuit board at a location where the element is placed, and a first convex part inserted into the hole and protruding toward the element is provided on the first substrate. Further, the element is placed within a periphery of the first convex part as seen from a direction perpendicular to the first substrate.