Curved Diaphragm and Bent Framework for Wider Speaker Frequency Band
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Solution Overview
Problem
Existing sound devices have insufficient strength due to planar structures of the dome and framework, resulting in a narrow frequency band and poor sound production effect.
Innovation Solution
The sound device features a vibrating diaphragm with annular dome and folding ring portions, connected by a framework with bent framework glue containing portions, enhancing structural strength and improving high-frequency performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the dome and framework are of a planar structure, then the manufacturing is simple, but the structural strength is insufficient
Solution Approach 1:
The patent applies curvature by transforming the planar dome into a three-dimensional spherical or dome-shaped structure. This curvature provides better structural strength and rigidity while maintaining manufacturing feasibility through molding processes. The framework is also designed with three-dimensional spatial structures rather than simple planar arrangements, enhancing overall structural integrity.
Solution Approach 2:
The patent transitions from two-dimensional planar structures to three-dimensional structures. The dome becomes a volumetric element with radial thickness, and the framework incorporates spatial arrangements with extension walls and support structures in multiple dimensions. This dimensional enhancement significantly improves structural strength without proportionally increasing manufacturing complexity.
2Productivity
If the dome and framework are of a planar structure, then the manufacturing is simple, but the frequency band is narrow
Solution Approach 1:
The curved dome structure enables better acoustic radiation patterns and frequency response characteristics. The spherical geometry allows for more uniform stress distribution and vibration modes, expanding the usable frequency band. The curvature also improves high-frequency performance by reducing diffraction effects and enhancing directional sound radiation.
Solution Approach 2:
By moving from planar to three-dimensional structures, the patent creates more complex vibration modes and acoustic radiation patterns. The spatial framework with extension walls and the volumetric dome structure enable better coupling between different frequency ranges, thereby expanding the overall frequency band and improving high-frequency response.
3Reliability
If the dome and framework are of a planar structure, then the manufacturing is simple, but the sound production effect is poor
Solution Approach 1:
The curved dome structure improves sound production by providing better acoustic radiation efficiency. The spherical geometry creates more uniform sound distribution and reduces standing wave effects. The three-dimensional framework structure enhances mechanical coupling and energy transfer from the voice coil to the diaphragm, improving overall sound production effectiveness.
Solution Approach 2:
The transition to three-dimensional structures creates better mechanical and acoustic coupling. The spatial framework with multiple support walls and the volumetric dome structure enable more efficient energy transfer and better sound radiation in multiple directions, significantly improving sound production effect compared to planar structures.
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 design enhances the sound device's structural strength, expanding its frequency band and improving high-frequency performance.
Implementation Method 1
The voice coil is inserted into the magnetic gaps to drive the vibrating diaphragm to vibrate and produce sound
Data Source
AI summary
A sound device includes a frame, a vibration system, and a magnetic circuit system. The vibration system is supported on the frame. The magnetic circuit system has magnetic gaps. The vibration system includes a vibrating diaphragm, a voice coil, and a framework. The voice coil is inserted into the magnetic gaps to drive the vibrating diaphragm to vibrate and produce sound. The framework is configured to connect the vibrating diaphragm and the voice coil. The vibrating diaphragm includes an annular dome portion, an annular first folding ring portion, and an annular second folding ring portion. The dome portion is connected to the first folding ring portion and the second folding ring portion. The framework includes a framework flat plate wall and framework glue containing portions. Compared with related art, the sound device is wider in frequency band and better in high-frequency performance.