Speaker Surround With Wave-Shaped Elastic Protrusion
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Solution Overview
Problem
Conventional speaker surrounds with uniform cross-sections experience irregular vibrations and frequency-dependent distortion due to asymmetrical operation curves, leading to severe sound distortion.
Innovation Solution
A surround structure featuring a wave-shaped elastic protrusion formed by arc-shaped parts with varying curvature, where the curvature decreases from the first end to the middle and increases from the middle to the second end, providing a non-uniform shape that enhances rigidity and symmetry, thus improving the balance and linearity of the operation curve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a uniform cross-section surround is used, then the manufacturing is simple, but the vibration becomes irregular and distortion increases
Solution Approach 1:
The patent applies local quality by varying the cross-sectional shape of the surround at different locations. Specifically, the surround transitions from a uniform cross-section to a non-uniform cross-section where the shape changes along the radial direction, allowing different regions to have optimized properties for vibration control while maintaining manufacturing feasibility through molding processes.
2Device complexity
If a uniform cross-section surround is used, then the structure is simple, but the operation curve symmetry deteriorates
Solution Approach 1:
The patent deliberately introduces asymmetry in the cross-sectional shape of the surround to achieve better symmetry in the operation curve. By making the cross-section non-uniform (with different shapes at different radial positions), the surround compensates for the inherent asymmetries in speaker vibration, resulting in a more symmetrical operation curve and reduced distortion.
3Quantity of substance
If a uniform cross-section surround is used, then the material usage is uniform, but the vibration regularity deteriorates
Solution Approach 1:
The patent implements local quality by distributing material non-uniformly across the surround cross-section. The cross-sectional shape is designed to vary at different locations, with specific regions having different thicknesses or shapes to optimize vibration characteristics. This localized material distribution improves vibration regularity while maintaining overall structural integrity.
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 surround structure achieves reduced sound distortion by ensuring better symmetry and balance between negative and positive movements, resulting in a more linear operation curve and improved audio characteristics.
Implementation Method 1
A surround is generally made of an elastic material, and has elasticity and toughness characteristics
Data Source
AI summary
A surround structure includes an inner rim, an outer rim, and a wave-shaped elastic protrusion, disposed between the inner rim and the outer rim. The wave-shaped elastic protrusion is integrally formed by a plurality of arc-shaped parts. Each arc-shaped part includes a first end, a second end, and a middle part between the first end and the second end. A radial section of each arc-shaped part is arcuate and includes a top edge and two arc-shaped segments combined with two sides of the top edge. A curvature of a radial section of each arc-shaped segment from the first end to the middle part gradually decreases, a curvature of a radial section of each arc-shaped segment from the middle part to the second end gradually increases, and a shape of a radial section of the first end is the same as a shape of a radial section of the second end.