Double-Sided Sounding Device With Split Voice Coils for Symmetric Force
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Solution Overview
Problem
Existing double-sided sounding devices suffer from excessive width and asymmetric electromagnetic force performances due to the upper voice coil surrounding the lower voice coil, leading to interference and poor acoustic performance.
Innovation Solution
The device features an upper voice coil with two voice coils arranged on opposite sides of the lower voice coil along the long axis, surrounded by a magnetic circuit system with strategically positioned main and side magnets and yokes, and flush side walls to reduce width and eliminate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the upper voice coil surrounds the lower voice coil, then the electromagnetic force performance is enhanced, but the product width becomes excessive and asymmetric electromagnetic force performances occur
Solution Approach 1:
The upper voice coil is divided into two separate voice coils that are arranged side by side with the lower voice coil, rather than having one coil surround the other. This segmentation allows the magnetic circuit system to be reconfigured with multiple magnets and yokes arranged in a planar layout, reducing the overall width while maintaining the total electromagnetic force output through distributed coil-magnet interactions.
2Device complexity
If the upper voice coil surrounds the lower voice coil, then the structure is compact, but asymmetric electromagnetic force performances and mutual interference occur
Solution Approach 1:
The patent employs a symmetric arrangement of magnetic poles and voice coils to achieve balanced electromagnetic force performance. Specifically, the magnetic circuit system includes alternating N and S poles arranged symmetrically, with voice coils positioned to interact with corresponding poles on opposite sides. This symmetric configuration ensures that both upper and lower voice coils experience equal and opposite electromagnetic forces, eliminating asymmetry and mutual interference while maintaining structural compactness.
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 configuration reduces product width and ensures symmetrical electromagnetic force performances, eliminating mutual interference between the voice coils and enhancing acoustic performance.
Implementation Method 1
an upper voice coil and a lower voice coil which are not overlapped with each other in a planar view respectively drive the upper diaphragm and the lower diaphragm for vibrating and sounding
Data Source
AI summary
A double-sided sounding device is disclosed. The double-sided sounding device includes an upper vibration system and a lower vibration system. The upper vibration system includes an upper voice coil, and the lower vibration system includes a lower voice coil. The upper voice coil includes a first voice coil and a second voice coil respectively arranged on two opposite sides of the lower voice coil along a direction of a long axis of the double-sided sounding device. The double-sided sounding device reduces the product width, has symmetrical electromagnetic force performances of the upper voice coil and the lower voice coil, and eliminates mutual interferences between the upper voice coil and the lower voice coil when working.