Speaker Dome Mass Reduction via Local Quality and Edge Openings
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speaker dome structures face challenges in maintaining strength and high-frequency characteristics due to mass reduction techniques that compromise structural integrity and increase the risk of wrinkling when holes are cut at the straight edge, leading to reduced reliability.
Innovation Solution
A speaker dome with a new structure featuring openings along the inner side of the straight edges instead of the edges themselves, allowing for reduced mass without compromising high-frequency performance and enhancing reliability by minimizing the blank area between the folded ring and the dome.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If holes are cut at the straight edge of the dome to reduce mass, then the dome mass is reduced, but the strength of the dome is severely reduced and high-frequency characteristics are affected
Solution Approach 1:
The patent applies local quality by making the dome structure non-uniform: the straight edges have increased thickness (0.8-1.2mm) for strength, while the arc edges have reduced thickness (0.5-0.8mm) for mass reduction. This localized variation in material distribution allows the dome to achieve both high strength at critical locations and low overall mass, resolving the contradiction between mass reduction and strength maintenance.
2Weight of moving object
If holes are cut at the straight edge of the dome, then mass is reduced, but the blank area increases causing wrinkles and reducing reliability
Solution Approach 1:
The patent positions holes only at the arc edges of the dome, away from the straight edges where the folded ring connects. This local placement strategy reduces mass through hole creation while avoiding the creation of large blank areas that would cause wrinkling during vibration and falling, thus maintaining product reliability.
3Weight of moving object
If the dome is made with a plate structure and holes cut at straight edge, then mass reduction is achieved, but high-frequency characteristic is affected due to insufficient strength
Solution Approach 1:
The patent enhances the straight edges with increased thickness (0.8-1.2mm) to maintain structural strength and prevent split vibration, while reducing mass through thinner arc edges (0.5-0.8mm) and strategic hole placement. This local quality variation allows the dome to maintain high-frequency characteristics by preventing excessive deformation and split vibration, while still achieving mass reduction.
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 effectively reduces the dome's mass while maintaining high-frequency characteristics, improving the product's sensitivity and reliability by avoiding strength reduction and minimizing wrinkling risks during vibration and falling.
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. The dome includes two first straight edges arranged oppositely and two second straight edges connected with the two first straight edges, the dome includes a central portion and an edge portion, the edge portion includes a first region arranged along the first straight edge and a second region arranged along the second straight edge, and both the first region and the second region are provided with an opening portion penetrating through the dome along a vibration direction.