Piezoelectric Sound Component Corner Support Low Frequency Pressure
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Solution Overview
Problem
Existing piezoelectric sound components struggle to achieve high sound pressure in the low frequency band, limiting their sound quality.
Innovation Solution
A piezoelectric sound component design featuring a resin sheet with a substantially polygonal piezoelectric diaphragm attached to its central portion and supported by a casing that holds the peripheral portion, with specific casing configurations to prevent damage and enhance vibration, allowing increased sound pressure in the low frequency band.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the piezoelectric diaphragm is attached to the central portion of the resin sheet without peripheral support, then the diaphragm can vibrate freely, but the sound pressure in the low frequency band cannot be increased sufficiently
Solution Approach 1:
The casing provides localized support only at the corner portions of the piezoelectric diaphragm rather than full peripheral support. This local support structure increases sound pressure in the low frequency band while maintaining sufficient vibration freedom in the central portion, resolving the contradiction between sound pressure improvement and structural complexity.
2Stability of the object's composition
If the casing holds the peripheral portion of the resin sheet, then the structure is stable, but the piezoelectric diaphragm may be damaged
Solution Approach 1:
The casing is designed to hold only the peripheral portion of the resin sheet while deliberately avoiding direct contact with the piezoelectric diaphragm. The corner support structure provides stability without transmitting harmful forces to the diaphragm, resolving the contradiction between structural stability and damage prevention.
Solution Approach 2:
The resin sheet acts as an intermediary between the casing and the piezoelectric diaphragm. The casing holds the resin sheet periphery while the diaphragm attaches to the central portion, creating a buffered interface that prevents direct mechanical damage to the diaphragm while maintaining structural stability.
3Reliability
If the piezoelectric diaphragm is supported at corner portions, then sound pressure increases, but the diaphragm displacement may be restricted
Solution Approach 1:
Corner support provides localized constraint only at the four corner portions while leaving the central and edge regions free to displace. This localized support increases sound pressure through improved vibration control without excessively restricting the overall diaphragm displacement needed for acoustic output.
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 design effectively increases sound pressure in the low frequency band, improving sound quality by supporting the corner portions of the piezoelectric diaphragm, which enhances displacement and phase prevention, resulting in improved sound pressure across the frequency spectrum.
Implementation Method 1
a piezoelectric diaphragm that is smaller than the resin film is attached to a central portion of the resin film... a substantially polygonal piezoelectric diaphragm... The piezoelectric diaphragm vibrates by bending
Data Source
AI summary
A piezoelectric sound component that includes a resin sheet, a piezoelectric diaphragm, and a casing. The piezoelectric diaphragm vibrates by bending, and is attached to at least part of a central portion of the resin sheet excluding a peripheral portion of the resin sheet. The casing holds the peripheral portion of the resin sheet. The casing supports at least one corner portion of the piezoelectric diaphragm.