Sounding Device Metal Shrapnel Voice Coil Restraint
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Solution Overview
Problem
Existing sounding devices in audio equipment face challenges in miniaturization and automatic assembly due to complex structures and insufficient structural strength, particularly in restraining the voice coil, which affects their reliability and performance.
Innovation Solution
A sounding device design featuring a frame with a magnetic circuit system and a vibration system, where two metal shrapnels with conductive functions are used to restrain the voice coil, providing structural support and electrical connectivity, while the magnetic circuit system includes a yoke and magnets to enhance magnetic flux and prevent voice coil swinging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If FPC is used as a component to support the voice coil, then the structure is simplified, but the structural strength is insufficient and the voice coil cannot be restrained from swinging
Solution Approach 1:
The patent combines the supporting function and the restraining function into a single integrated component. The U-shaped supporting component not only supports the voice coil but also restrains it from swinging through its specific geometry and connection to the frame, eliminating the need for separate FPC and suspension structures.
Solution Approach 2:
The supporting component is designed with elastic properties, allowing it to flexibly adapt to the voice coil's movements while maintaining restraining force. The component can elastically deform to accommodate voice coil displacement during operation while still preventing excessive swinging.
2Reliability
If manual welding of braided wire and voice coil lead wire is performed, then electrical connection is achieved, but the assembly process is complicated and not conducive to automatic assembly
Solution Approach 1:
The supporting component integrates both mechanical support and electrical connection functions. The component includes conductive portions that directly contact the voice coil lead wire, combining the structural support role with the electrical connectivity role in a single element.
Solution Approach 2:
The patent replaces the traditional mechanical welding process with a snap-fit or press-fit electrical connection mechanism. The conductive portions of the supporting component make direct contact with the voice coil lead wire through elastic force, eliminating the need for welding operations and enabling automatic assembly.
3Volume of moving object
If the sounding device is miniaturized, then the coordination with peripheral components is more compact, but the structural strength and voice coil restraint capability are reduced
Solution Approach 1:
The supporting component is designed as a thin, U-shaped elastic structure that provides maximum restraint capability relative to its size. The flexible nature of the component allows it to maintain strength while occupying minimal space, enabling effective voice coil restraint in a miniaturized device configuration.
Solution Approach 2:
The supporting component appears to be made from a composite structure combining rigid and elastic materials, providing both strength for restraint and flexibility for miniaturization. The material composition allows the component to maintain adequate strength while being thin enough for compact device coordination.
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 improves the reliability and performance of sounding devices by providing effective structural support and electrical connectivity, enabling better voice coil restraint and enhanced sound production, while simplifying assembly and reducing size and energy consumption.
Implementation Method 1
a voice coil driving the diaphragm to vibrate and arranged around the magnetic part
Implementation Method 2
an elastic arm connecting the first connecting portion and the second connection portion
Data Source
AI summary
The present disclosure discloses a sounding device including a frame, a magnetic circuit system with a magnetic part and a vibration system. The vibration system includes a diaphragm fixed to the frame, a voice coil driving the diaphragm to vibrate and arranged around the magnetic part, and a metal shrapnel with conductive function. One end of the metal shrapnel is fixed to the frame and electrically connected to an external circuit, and the other end of the metal shrapnel is fixed to the voice coil and electrically connected to the lead wire of the voice coil. The metal shrapnel restrains a movement of the voice coil in a direction perpendicular to a vibration direction of the diaphragm. Compared with the related art, the sounding device disclosed by the present disclosure can reduce the number of elements to simplify the product structure.