Elastic Member Centering Support for Thin Loudspeaker Design
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Solution Overview
Problem
The centering supporting sheet in traditional loudspeakers with a sheet-shaped elastic wave shape complicates the manufacturing process, increases height, occupies space, and affects voice coil vibration due to poor compliance and potential stress concentration.
Innovation Solution
The application device employs elastic members with varying cross-sectional sizes and shapes, including straight and curved deformation portions, to provide centering support while reducing stress concentration and maintaining compliance during large vibration displacements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a centering supporting sheet in sheet-shaped elastic wave shape is used, then the voice coil can be prevented from polarizing, but the manufacturing process becomes complicated and the height of the loudspeaker increases
Solution Approach 1:
The centering supporting sheet is divided into multiple independent elastic members (first elastic member, second elastic member, third elastic member, fourth elastic member) arranged at different positions. Each elastic member independently provides centering support, allowing simplified manufacturing of individual components while achieving reliable overall centering support.
Solution Approach 2:
The elastic members are designed with specific geometric shapes (L-shape, T-shape, etc.) that provide centering support in the vertical direction while occupying minimal horizontal space. This dimensional optimization reduces the overall height of the loudspeaker without compromising centering functionality.
2Reliability
If a centering supporting sheet in sheet-shaped elastic wave shape is used, then the voice coil can be prevented from polarizing, but the product occupies more space and is not convenient for thinning
Solution Approach 1:
The elastic members are designed as thin, flexible components with optimized cross-sectional shapes that provide sufficient mechanical support and centering functionality while occupying minimal vertical space. This allows the loudspeaker to achieve thinning without compromising voice coil centering support.
3Reliability
If a centering supporting sheet in sheet-shaped elastic wave shape is used, then the voice coil can be prevented from polarizing, but the compliance becomes worse when the voice coil has large vibration displacement
Solution Approach 1:
The elastic members are designed with dynamic geometric features (curved portions, varying thickness) that allow them to adapt their stiffness characteristics during vibration. When the voice coil has large vibration displacement, the elastic members can deform more compliantly, maintaining good compliance while still providing centering support.
Solution Approach 2:
Different portions of the elastic members have different structural characteristics (e.g., curved portions with different radii, varying thickness) that provide localized compliance. This allows the elastic members to maintain centering support while adapting to large vibration displacements without forming opposing stress.
4Reliability
If a centering supporting sheet in sheet-shaped elastic wave shape is used, then the voice coil can be prevented from polarizing, but stress concentration may occur affecting the vibration of the voice coil
Solution Approach 1:
The elastic members incorporate curved portions with optimized radius of curvature that distribute stress more evenly throughout the structure. The curved geometry eliminates sharp corners and stress concentration points, allowing the elastic members to provide centering support without creating stress concentrations that would affect voice coil vibration.
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 solution simplifies manufacturing, reduces product height, and ensures sufficient displacement without affecting voice coil vibration, optimizing performance by minimizing stress concentration and eliminating resonance.
Implementation Method 1
each of the elastic members comprises a first connecting portion, a second connecting portion, and a deformation portion between the first connecting portion and the second connecting portion
Data Source
AI summary
Disclosed is an application device, comprising a plurality of elastic members, each elastic member comprises a first connecting portion, a second connecting portion and a deformation portion therebetween, the first connecting portion and the second connecting portion are respectively connected to different members in the application device, and the different members are movable or fixed relative to each other, wherein the deformation portion is formed by extending from a first end to a second end in a straight line and/or a curve in the same direction or in different directions. According to the present disclosure, the manufacturing is simple and convenient, thinning of product is facilitated, and the elastic members maintain good compliance, without influencing the vibration of a vibration unit. At least one elastic member is widened and/or has at least two cross sections with different sizes, thereby reducing the stress concentration, and eliminating the resonance.