Deformation Sensor With Segmented Corner Fixing Structure
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing deformation detection sensors in terminals are not effective in detecting deformation of a member due to the rigid fixation of the holding member to the housing, which limits deformation and reduces the sensitivity of the piezoelectric sensor's detection.
Innovation Solution
A sensor design with a holding member and deformation detection sensor where the holding member is fixed at multiple corner portions to the housing, allowing for gaps and using softer fixing portions to enhance deformation detection sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the holding member is rigidly fixed to the housing, then the structural stability is improved, but the deformation detection sensitivity deteriorates
Solution Approach 1:
The fixing structure is segmented into multiple discrete fixing portions (first fixing portions at corner portions and second fixing portions at side portions) rather than continuous rigid fixation. This segmentation allows different regions to have different degrees of freedom, enabling deformation detection while maintaining overall structural stability.
Solution Approach 2:
Different fixing portions are applied to different regions of the holding member with different characteristics. The first fixing portions are placed at corner portions while second fixing portions are placed at side portions, creating local variations in fixation strength that allow specific regions to deform for detection while others provide stability.
2Stability of the object's composition
If the holding member is fully fixed to the housing, then the positional stability is improved, but the deformation capability deteriorates
Solution Approach 1:
The fixing structure transitions from static rigid fixation to a dynamic system where the holding member can deform between the fixed corner portions. The gaps between fixing portions allow the holding member to dynamically adjust its shape in response to external forces while maintaining positional stability at the fixed points.
Solution Approach 2:
By dividing the fixation into discrete segments (first fixing portions at corners, second fixing portions at sides) rather than continuous fixation, the system allows deformation in the gaps between segments while maintaining stability at the segment locations.
3Strength
If adhesive is applied extensively to fix the holding member, then the bonding strength is improved, but the deformation sensitivity deteriorates
Solution Approach 1:
The adhesive application is segmented into specific discrete locations (corner portions and side portions) rather than extensive continuous application. This concentrated adhesive application at key points provides sufficient bonding strength while leaving gaps that allow deformation detection.
Solution Approach 2:
Adhesive is applied locally at specific portions (first fixing portions at corners, second fixing portions at sides) rather than uniformly across the entire holding member. This creates local bonding strength at critical points while maintaining deformation capability in between.
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 sensor easily detects deformation of the holding member by allowing it to protrude, improving the sensitivity of the deformation detection sensor's response and reducing the risk of foreign matter ingress.
Implementation Method 1
The piezoelectric sensor outputs a signal according to deformation of the holding member
Data Source
AI summary
A sensor that includes: a holding member having a first main surface and a second main surface arranged in a first direction and having a rectangular shape as viewed from the first direction; a deformation detection sensor constructed to output a signal when the holding member is deformed; and a plurality of first fixing portions fixed to the second main surface and overlapping corner portions of the holding member as viewed from the first direction, and the plurality of first fixing portions are separated from each other.