Movable Sensor Support Structure for Resonance and Vibration Stability
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Solution Overview
Problem
Existing sensors and electronic devices require improved stability and vibration resistance to maintain consistent performance.
Innovation Solution
A sensor design featuring a base body with a support member and movable member, where the support member includes a wider support portion and extending portion, stabilized by an insulating layer, reduces deflection and enhances resonance characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support member has a uniform width, then the structure is simple, but the resonance characteristics and vibration resistance are insufficient
Solution Approach 1:
The support member is designed with non-uniform width: the first portion (near the movable member) has a narrower width to reduce mass and improve resonance characteristics, while the second portion (near the base body) has a wider width to provide stable support and reduce deflection. This local differentiation resolves the contradiction by optimizing each region for its specific function.
2Reliability
If the support member is made thinner to reduce deflection, then the resonance characteristics improve, but the vibration resistance deteriorates
Solution Approach 1:
The support member's width is locally optimized: the narrower first portion reduces mass and improves resonance characteristics, while the wider second portion provides sufficient structural rigidity to resist vibrations. This resolves the contradiction by distributing different width characteristics to different functional regions.
3Ease of manufacture
If the extending portion has the same width as the support portion, then the manufacturing is easier, but the deflection increases
Solution Approach 1:
The extending portion is designed with a narrower width than the support portion to reduce the mass moment of inertia and minimize deflection during operation. Although this increases manufacturing complexity compared to a uniform width design, it significantly improves the stability of the movable member's position by reducing deflection.
4Object-affected harmful factors
If the support member is wider throughout, then the vibration resistance improves, but the resonance characteristics deteriorate
Solution Approach 1:
The support member uses a narrower first portion (width W1) to optimize resonance characteristics by reducing mass, and a wider second portion (width W2) to provide vibration resistance. This local differentiation allows each region to perform its optimal function, resolving the contradiction between resonance characteristics and vibration resistance.
Data Source
AI summary
According to one embodiment, a sensor includes a base body, a support member, and a movable member. The base body includes a first face including a first base region. The support member is fixed to the first base region. The support member includes a support portion and an extending portion. The extending portion is connected to the support portion. The extending portion extends along a second direction crossing a first direction from the first base region to the support portion. A first width of the support portion in a third direction crossing a plane including the first direction and the second direction is wider than a second width of the extending portion in the third direction. The movable member is supported by the extending portion. A first gap is provided between the first face and the movable member.