Speaker Diaphragm Stiffness via Bamboo Leaf Plant Opal Resin Composite
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Solution Overview
Problem
Conventional speaker diaphragms face challenges in achieving high sound quality and stiffness, with limited adjustability of physical properties, particularly in terms of sound velocity and moisture resistance, which affects the playback frequency bandwidth and strain.
Innovation Solution
Incorporating plant opal extracted from bamboo leaves into the resin used in speaker diaphragms, dust caps, and frames through injection molding or sheet molding, enhancing stiffness and sound velocity, and adjusting the mix ratio of plant opal and bamboo fibers to optimize sound quality and reduce strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional resin materials are used for speaker diaphragm, then manufacturing simplicity is maintained, but sound quality and stiffness are insufficient
Solution Approach 1:
The patent uses composite materials consisting of resin and plant opal extracted from bamboo leaves. The plant opal particles are dispersed in the resin matrix to form a composite material that combines the flexibility and moldability of resin with the stiffness and acoustic properties of natural plant opal, thereby improving sound quality while maintaining manufacturing simplicity through injection molding processes.
2Speed
If plant opal is added to resin, then stiffness and sound velocity are improved, but manufacturing complexity increases
Solution Approach 1:
The patent controls the particle size of plant opal within specific ranges (5-20 μm for diaphragm, 10-50 μm for dust cap, 5-30 μm for frame) and adjusts the mixing ratio of plant opal to resin. By optimizing these parameters, the composite material achieves improved sound velocity and stiffness while maintaining good flowability and moldability for injection molding processes.
3Reliability
If playback frequency bandwidth is expanded, then sound quality is improved, but strain on speaker components increases
Solution Approach 1:
The plant opal particles act as reinforcement in the resin matrix, creating a composite material with enhanced mechanical strength and stiffness. This allows the speaker components to withstand the increased strain associated with expanded playback frequency bandwidth while maintaining or improving sound quality. The composite structure distributes stress more effectively than pure resin materials.
Data Source
AI summary
Each of a speaker diaphragm, a dust cap, and a frame includes a resin and a plant opal that is extracted from a bamboo leaf, and is formed by injection molding or sheet molding. The configuration can enhance stiffness of each of the diaphragm, the dust cap, and the frame and implement high performance.