Vibrator Support Substrate With Stress-Relaxing Frame Portions
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Solution Overview
Problem
The existing vibrator devices face issues with stress concentration and rigidity in beam portions, leading to flexible deformation and difficulty in handling during mounting, as seen in the support substrate design of JP-A-2021-21636.
Innovation Solution
The support substrate includes a frame portion with stress relaxation portions, such as thin, narrow, or spring-like structures, which are designed to absorb and disperse stress, ensuring rigidity and ease of handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If beam portions are made thin and flexible to reduce stress concentration, then stress distribution improves, but rigidity decreases and handling becomes difficult
Solution Approach 1:
The frame portion is segmented into multiple beam portions (first beam portions and second beam portions) that are arranged to collectively support the element mounting portion. This segmentation allows stress to be distributed across multiple discrete structural elements rather than concentrated in a single continuous frame, reducing stress concentration while maintaining overall rigidity through the collective support structure.
Solution Approach 2:
The beam portions are designed with specific local geometric characteristics (width, thickness, and arrangement patterns) that optimize the balance between flexibility and rigidity. The first and second beam portions have different configurations tailored to their specific support requirements, allowing each local region to have the appropriate mechanical properties for its function.
2Ease of operation
If beam portions are made rigid to ensure structural stability, then handling improves, but stress concentration increases and flexibility decreases
Solution Approach 1:
The frame is divided into multiple discrete beam portions that can be individually optimized for both rigidity and stress distribution. The segmented structure provides sufficient rigidity for handling while the gaps between segments allow stress to be distributed rather than concentrated, resolving the contradiction between handling ease and stress concentration.
Solution Approach 2:
The beam portions are designed to exhibit dynamic mechanical behavior, allowing them to flexibly adapt to mounting stresses while maintaining structural integrity. The geometric design enables the beams to deform elastically under load, providing both handling rigidity and stress relaxation capabilities.
3Strength
If a continuous frame structure is used to ensure rigidity, then handling improves, but stress concentration at critical points increases
Solution Approach 1:
The continuous frame is replaced with a segmented arrangement of first and second beam portions that collectively provide frame-like support. This segmentation eliminates stress concentration points that would exist in a continuous frame by distributing loads across multiple discrete support elements, improving reliability while maintaining rigidity.
Solution Approach 2:
The beam portions act as intermediary support elements between the frame and the element mounting portion, mediating the transmission of forces and stresses. This intermediary structure distributes mechanical loads more evenly, reducing stress concentration at critical interface points while maintaining the necessary rigidity for structural support.
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 frame portion with stress relaxation features enhances rigidity, reduces stress concentration, and improves handling during mounting, preventing failures and maintaining detection accuracy.
Implementation Method 1
the frame portion includes a stress relaxation portion as a thin portion, a narrow portion, or a spring portion
Data Source
AI summary
The vibrator device includes a vibration element, a support substrate supporting the vibration element, and a base to which the support substrate is attached. The support substrate includes a frame portion, an element mounting portion provided inside the frame portion, on which the vibration element is mounted, and a plurality of beam portions supporting the element mounting portion inside the frame portion. The frame portion includes stress relaxation portions as thin portions, narrow portions, or spring portions.