Piezoelectric Speaker Vibration Plate for Heat and Crack Control
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Solution Overview
Problem
Piezoelectric loudspeakers face challenges with internal volume determination by enclosure tape thickness affecting frequency band, heat dissipation, and structural limitations, as well as vulnerability to cracking due to thin elements.
Innovation Solution
A vibration apparatus with a vibrating member and adjustable vibration modules, including a vibration plate with a protruding part and a support member, allows for adaptive frequency band control, improved heat dissipation, and reduced cracking risk through material selection and design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the thickness of the enclosure tape is increased to determine internal volume, then the internal volume is increased, but the reproduction frequency band changes and heat dissipation becomes difficult
Solution Approach 1:
The vibration module is divided into separate functional components: the piezoelectric element, the vibration plate, and the enclosure tape. This segmentation allows the enclosure tape to provide structural support and define internal volume without directly interfering with the heat dissipation path from the piezoelectric element to the vibration plate.
Solution Approach 2:
The vibration plate acts as an intermediary between the piezoelectric element and the enclosure tape. It provides a thermal conduction path for heat dissipation while the enclosure tape maintains the internal volume, separating the thermal management function from the structural volume definition function.
2Volume of moving object
If the thickness of the enclosure tape is increased to determine internal volume, then the internal volume is increased, but the reproduction frequency band changes
Solution Approach 1:
The system allows for dynamic adjustment of the vibration region area by modifying the configuration of the enclosure tape or vibration plate, enabling the reproduction frequency band to be adapted while maintaining the required internal volume through compensatory design changes.
Solution Approach 2:
By changing geometric parameters such as the area of the vibration region, the thickness of the vibration plate, or the configuration of the enclosure tape, the reproduction frequency band can be adjusted independently from the internal volume determination.
3Volume of moving object
If the shape or structure of the cover of the back surface is fixed to determine internal volume, then the internal volume is determined, but it becomes difficult to freely control the vibration region
Solution Approach 1:
The cover structure is segmented into the enclosure tape and the vibration plate, allowing independent optimization of each component. The enclosure tape defines the internal volume while the vibration plate configuration controls the vibration region, enabling free adjustment of vibration characteristics without being constrained by the overall cover shape.
4Weight of moving object
If the piezoelectric elements are made thin to reduce weight, then the weight is reduced, but the likelihood of cracking increases during attachment or transport
Solution Approach 1:
A protective flexible protective film is applied to the surface of the thin piezoelectric element. This film provides mechanical protection against cracking during attachment and transport while maintaining the lightweight advantage of the thin element design.
Solution Approach 2:
The protective film is applied in advance before attachment and transport operations, providing beforehand cushioning and protection against mechanical stresses that would otherwise cause cracking in the thin piezoelectric element.
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
Enables flexible frequency band adjustment, enhanced heat dissipation, and minimizes cracking by fixing the vibrating element, achieving a unified component structure.
Implementation Method 1
Acoustic apparatuses have a vibration system that converts an electrical input signal into physical vibrations. Piezoelectric loudspeakers made from piezoelectric elements are used in a variety of applications
Data Source
AI summary
A vibration apparatus including a vibrating member, and a vibration module including a vibration plate arranged on the vibrating member, and a vibrating element arranged on the vibration plate, wherein the vibration plate includes a protruding part arranged outside a periphery of the vibrating element.