Monolithic Piezoelectric Diaphragm and Fixation Electrode Integration
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Solution Overview
Problem
Existing vibrating devices face challenges in improving productivity, reliability, and vibration efficiency due to the complexity of joining piezoelectric diaphragms with inserted terminals, which often compromises the reliability of vibration transmission.
Innovation Solution
A vibrating device design featuring a diaphragm and fixation electrodes formed as a single monolithic member, with the fixation electrodes extending from different sides of the diaphragm, allowing for integral integration and reduced need for separate joining, enhancing manufacturing efficiency and vibration transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate piezoelectric diaphragm and inserted terminals are joined together, then the device can be assembled with distinct components, but the joining reliability deteriorates and productivity decreases
Solution Approach 1:
The patent merges the piezoelectric diaphragm and fixation electrodes into a single integrated structure where the electrodes are formed directly on the diaphragm surface. This eliminates the separate joining process between diaphragm and terminals, thereby improving joining reliability while maintaining manufacturing ease through integrated fabrication
2Ease of manufacture
If separate piezoelectric diaphragm and inserted terminals are joined together, then the device can be assembled with distinct components, but productivity deteriorates due to complex joining processes
Solution Approach 1:
The piezoelectric diaphragm and fixation electrodes are integrated into a single component that can be manufactured as one piece, eliminating the need for separate joining operations. This integration directly improves productivity by reducing the number of assembly steps and associated complexities
3Device complexity
If fixation electrodes extend from the same side of the diaphragm, then the structure is simpler, but vibration efficiency deteriorates due to interference
Solution Approach 1:
The patent employs asymmetric positioning of fixation electrodes on opposite sides of the diaphragm, creating an asymmetric structure that prevents vibration interference. This asymmetric arrangement allows each electrode to function independently without disrupting the vibration pattern, thereby maintaining high vibration efficiency
4Ease of manufacture
If multiple separate components are used, then the device can be manufactured with standard components, but the device size increases
Solution Approach 1:
The patent combines multiple separate components (piezoelectric diaphragm and fixation electrodes) into a single integrated structure. This merging eliminates the need for separate components and their associated mounting spaces, thereby reducing the overall device size while maintaining ease of manufacture through integrated fabrication processes
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 design improves productivity, reliability, and vibration efficiency by eliminating the need for separate joining members, ensuring robust vibration transmission and impact resistance while reducing the device's size.
Implementation Method 1
a vibrator 13A, 13B which vibrates the vibrating portion 8, 9
Data Source
AI summary
A vibrating device includes a diaphragm that includes first and second vibrating portions and a fixation portion, first and second piezoelectric vibrators that are provided at the first and second vibrating portions, respectively, and fixation electrodes. The fixation portion includes a first side portion and a second side portion that extend in different directions. The diaphragm and the fixation electrodes are provided integrally as a single monolithic member. The first vibrating portion extends from the first side portion and the fixation electrodes extend from the second side portion.