Speaker Dome Segmentation for Mass Reduction
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Solution Overview
Problem
Existing speaker dome structures with plate structures and cut holes in the middle portion suffer from reduced strength and compromised high-frequency characteristics due to insufficient strength at high frequencies, especially in products with large aspect ratios.
Innovation Solution
A speaker design featuring a dome with two or more opening portions along its side edges, where extended portions are arranged between adjacent openings, maintaining structural strength while reducing mass and improving sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If holes are cut in the middle portion of the straight edge of the dome to reduce mass, then the mass of the dome is reduced, but the strength of the dome is severely reduced and high-frequency characteristics are affected
Solution Approach 1:
The dome is segmented into multiple regions with different structural characteristics. The middle portion of straight edges is divided into multiple smaller opening portions rather than one large hole, with extended portions separating them. This segmentation allows mass reduction while preserving structural strength by distributing the openings and maintaining material continuity through the extended portions.
Solution Approach 2:
Different regions of the dome are given different structural qualities. The middle portion of straight edges contains multiple small openings with extended portions for mass reduction, while other regions maintain solid plate structure for strength. This local differentiation optimizes the balance between mass reduction and structural integrity at different locations.
2Weight of moving object
If the size of the hole cut in the middle portion of the straight edge of the dome is too large, then the mass of the dome is reduced, but the strength of the middle portion of the dome is seriously affected
Solution Approach 1:
A single large hole is segmented into multiple smaller opening portions arranged along the middle portion of the straight edge. The extended portions between these openings act as structural connectors, distributing the load and preventing the severe strength reduction that would occur with a single large hole while still achieving mass reduction.
3Strength
If the size of the hole cut in the middle portion of the straight edge of the dome is too small, then the strength of the dome is maintained, but the mass of the dome cannot be well reduced preferably
Solution Approach 1:
Instead of using a single small hole that fails to reduce mass effectively, the structure uses multiple small opening portions distributed along the middle portion of the straight edge. This segmented approach accumulates mass reduction across multiple locations while the extended portions maintain structural strength, achieving both goals simultaneously.
4Weight of moving object
If the dome is a plate structure with rounded corners and holes cut in the middle portion of straight edges, then the mass is reduced, but the dome is prone to split vibration at high frequencies due to insufficient strength
Solution Approach 1:
The dome structure is segmented with multiple small opening portions separated by extended portions along the middle portion of straight edges. This segmentation pattern prevents split vibration by distributing stress and maintaining structural continuity through the extended portions, while still achieving mass reduction for improved high-frequency characteristics.
Solution Approach 2:
The dome maintains rounded corners and curved surfaces throughout its structure, including the extended portions between openings. This curvature distributes stress more evenly compared to sharp angles, preventing stress concentration and split vibration at high frequencies while maintaining the mass-reduced 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
The new dome structure effectively reduces mass without affecting high-frequency characteristics, enhancing the speaker's sensitivity and structural integrity.
Implementation Method 1
a voice coil (15) located below the diaphragm (13) and used for driving the diaphragm (13) to vibrate and sound
Data Source
AI summary
The present invention provides a speaker, which includes a basket, a diaphragm fixed to the basket, and a voice coil located below the diaphragm and used for driving the diaphragm to vibrate and sound. The diaphragm includes a dome and a folded ring, and the dome includes first side edges arranged oppositely and second side edges connected with the first side edges and arranged oppositely. The dome includes two or more opening portions disposed separately along the first side edge or the second side edge, and an extended portion is arranged between two adjacent opening portions.