Sounding Device Diaphragm Dome Structure for Voice Coil Stability
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Solution Overview
Problem
The existing sounding devices in mobile communication devices have a complex structure due to the inclusion of a skeleton, which increases manufacturing costs and weight, and complicates the assembly process.
Innovation Solution
A simplified sounding device design replaces the skeleton with a dome structure that integrates a protruded platform and reinforcement elements, providing a stable connection between the voice coil and conductive element without additional parts, using a cylindrical voice coil and flexible circuit board, and a magnetic circuit system with main and auxiliary magnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a skeleton is added to adjust voice coil position and improve vibration symmetry, then the structural stability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the voice coil support function and vibration symmetry adjustment function into the diaphragm structure itself. The diaphragm includes a dome part with a bottom wall that directly supports the voice coil, and side walls that provide structural symmetry, eliminating the need for a separate skeleton component while maintaining both structural stability and vibration symmetry.
Solution Approach 2:
The diaphragm is designed to perform multiple functions: it serves as the vibration membrane, the support structure for the voice coil, and the symmetry-adjusting element. The dome part with its bottom wall and side walls provides both mechanical support and geometric symmetry, making the diaphragm a multi-functional component that replaces the specialized skeleton.
2Reliability
If a skeleton is added to support the voice coil and conductive element, then the connection stability is improved, but the weight of the sounding device increases
Solution Approach 1:
The support function for the voice coil and conductive element is merged into the diaphragm structure. The bottom wall of the dome part supports the voice coil, while the side walls extend to support the conductive element, eliminating the need for a separate skeleton and reducing overall weight while maintaining connection stability.
Solution Approach 2:
The diaphragm utilizes a thin-walled dome structure made of flexible material that provides sufficient mechanical support. The thin walls of the dome part and side walls offer the necessary support for voice coil and conductive element positioning without the weight penalty of a rigid skeleton, leveraging the flexibility and strength-to-weight ratio of the thin-film structure.
3Manufacturing precision
If a skeleton is included in the vibration system, then the voice coil positioning is improved, but the assembly process becomes more complex
Solution Approach 1:
The voice coil positioning function is merged into the diaphragm structure. The bottom wall of the dome part provides a built-in mounting surface for the voice coil, and the side walls guide the conductive element positioning. This integration eliminates separate positioning components and simplifies the assembly process while maintaining manufacturing precision.
Solution Approach 2:
The diaphragm is segmented into functional zones: the bottom wall area for voice coil support, the side wall areas for conductive element support, and the rim area for suspension attachment. This segmentation of functional zones within a single component allows for precise positioning of each element without requiring separate positioning components, simplifying assembly while maintaining precision.
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 reduces the assembly complexity and weight, enhances reliability by stabilizing the voice coil and conductive element connection, and maintains performance while lowering manufacturing costs.
Implementation Method 1
a magnetic circuit system for driving vibration of the vibration system
Implementation Method 2
a voice coil and a skeleton between the diaphragm and the voice coil
Data Source
AI summary
The present disclosure provides a sounding device. The sounding device includes a vibration system, a magnetic circuit system, a conductive element and a fixed element. The vibration system includes a diaphragm and a voice coil fixed to the diaphragm. The diaphragm consists of a dome part and a suspension around the dome part. The dome part includes a dome body and a protruded platform of the dome extending from the dome body to the voice coil and fixed to the voice coil. The dome part also includes dome reinforcement elements. Compared with the related art, the sounding device provided by the present disclosure has a simple structure and good reliability.