Segmented Dome Diaphragm with Ridge Reinforcement for Speaker
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Solution Overview
Problem
Dome diaphragms in speakers face challenges in achieving uniform strength and preventing stress concentration, leading to potential damage and divided vibrations due to varying strength across reinforced and non-reinforced areas.
Innovation Solution
The dome diaphragm is divided into small portions with ridge portions formed at their boundaries, creating a framework that increases stiffness uniformly across the dome, using linear, mountain, or valley shapes, and various polygonal configurations to distribute stress effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the dome diaphragm is increased to increase strength, then the strength increases, but it becomes difficult to reproduce high-frequency sounds and cost increases
Solution Approach 1:
The dome diaphragm is divided into multiple dome portions (first, second, third, and fourth dome portions) with different thicknesses. The first dome portion has a greater thickness than the second dome portion, providing localized strength where needed while maintaining thinner sections for high-frequency sound reproduction.
Solution Approach 2:
Different portions of the dome diaphragm are given different thicknesses according to their functional requirements. The first dome portion (greater thickness) provides strength and structural support, while the second dome portion (smaller thickness) enables high-frequency sound reproduction, creating local quality variations throughout the structure.
2Strength
If a rib is added to reinforce the dome portion, then the overall strength increases, but the strength becomes non-uniform causing divided vibrations and stress concentration at boundaries
Solution Approach 1:
Instead of adding a single rib structure, the dome diaphragm is segmented into multiple dome portions (first, second, third, fourth) that are integrally formed. This segmentation distributes reinforcement throughout the structure rather than concentrating it at specific locations, eliminating stress concentration at boundaries.
Solution Approach 2:
The reinforcement structure is merged with the dome diaphragm itself by forming multiple dome portions with varying thicknesses as an integral structure. This eliminates the boundary between reinforced and non-reinforced areas, preventing stress concentration and divided vibrations while maintaining uniform strength distribution.
3Reliability
If the dome diaphragm is made thinner to improve high-frequency sound reproduction, then high-frequency sound reproduction improves, but the strength and stiffness decrease
Solution Approach 1:
The dome diaphragm is divided into multiple dome portions with different thicknesses. The second dome portion has a smaller thickness optimized for high-frequency sound reproduction, while the first dome portion provides greater thickness for strength and stiffness, allowing both requirements to be satisfied simultaneously.
Solution Approach 2:
Different thicknesses are assigned to different dome portions based on their specific functional requirements. The thinner second dome portion optimizes high-frequency sound reproduction locally, while the thicker first dome portion provides local strength and stiffness, achieving local quality optimization throughout the structure.
Data Source
AI summary
The present invention provides a dome diaphragm having high strength wholly and uniformly while maintaining a small thickness of a dome portion. A diaphragm 1 according to the present invention is a dome diaphragm including a dome portion 2. The dome portion 2 is divided into a plurality of small portions 4, and a ridge portion 7 is formed at a boundary of the small portions 4. In accordance with this configuration, the ridge portions 7 exist over the entire dome portion 2, and the ridge portions 7 can serve as frames for reinforcing the dome portion 2.