Acoustic Device Integrated Vibrator Frame for Miniaturization
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Solution Overview
Problem
Existing acoustic devices face challenges in miniaturization and efficient manufacturing due to separate components, which can lead to misalignment and stress on wiring members, affecting connection reliability and device performance.
Innovation Solution
The acoustic device integrates a piezoelectric element with a housing that incorporates a vibrator as both the main surface and frame body, where the frame body is positioned inward of the outer edge, facilitating alignment and reducing stress on wiring members, and includes a buffer member for secure attachment to external devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate components (vibrator and housing) are used in acoustic devices, then manufacturing flexibility is improved, but device size increases and alignment precision deteriorates
Solution Approach 1:
The patent combines the vibrator and housing into a single integrated component. The housing includes a vibrator portion that directly forms part of the housing structure, eliminating the need for separate assembly. This merging reduces the overall device volume while maintaining manufacturing flexibility through integrated design and molding processes.
2Strength
If frame body is positioned at outer edge of vibrator, then structural strength is improved, but positioning precision deteriorates due to misalignment
Solution Approach 1:
The frame body is pre-positioned inward of the outer edge of the vibrator main surface at a predetermined offset distance. This preliminary positioning arrangement ensures that during assembly, the frame body and vibrator automatically align with precise relative positioning, eliminating misalignment issues while maintaining structural strength through the optimized inward position.
3Reliability
If wiring member extends over frame body, then electrical connection is achieved, but stress on wiring member increases affecting connection reliability
Solution Approach 1:
The frame body serves as an intermediary structural element that provides a dedicated wiring member laying surface. This surface allows the wiring member to be routed and secured along the frame body's inner surface, distributing mechanical stress away from the critical electrical connection points at the piezoelectric element, thereby maintaining connection reliability while achieving electrical connectivity.
4Reliability
If buffer member is added for secure attachment, then attachment reliability is improved, but device complexity increases
Solution Approach 1:
The buffer member is integrated into the housing structure and serves multiple functions: it provides secure attachment to external devices through attachment portions, compensates for dimensional variations and misalignments, absorbs mechanical stress, and maintains consistent contact pressure. This multi-functionality achieves reliable attachment without significantly increasing device complexity, as the buffer member is incorporated into the existing housing design.
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 enables the creation of smaller, more uniformly manufactured acoustic devices with improved high-tone characteristics and reliable connections by reducing misalignment and stress on wiring members, while ensuring secure attachment and preventing gaps between the device and external components.
Implementation Method 1
an acoustic device that includes a piezoelectric element, and a housing holding the piezoelectric element
Data Source
AI summary
An acoustic device includes a piezoelectric element and a housing holding the piezoelectric element. The housing includes a vibrator having a main surface to which the piezoelectric element is bonded, and a frame body bonded to the main surface to surround the piezoelectric element. The frame body is disposed inward of an outer edge of the main surface when viewed in a direction perpendicular to the main surface.