Loudspeaker Diaphragm Assembly with Segmented Copper Foil
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Solution Overview
Problem
Conventional diaphragm assemblies in loudspeakers have uneven distances between non-copper-clad areas and uneven weight distribution of copper foil, leading to sound distortion due to uneven magnetic field intensity and force distribution.
Innovation Solution
The diaphragm assembly includes a diaphragm body with magnetized areas and a circuit pattern of copper sheets, where balance gaps are added between copper sheets to create narrow strips, improving uniformity and stability, and the copper sheets are arranged in parallel to ensure equal current and force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If copper sheets are arranged with isolation gaps according to average magnetic field intensity, then force per unit width is equalized, but distance between adjacent non-copper-clad areas becomes uneven and copper foil weight distribution becomes seriously uneven
Solution Approach 1:
The copper sheets are segmented by introducing balance gaps that divide each copper sheet into multiple narrow strips. This segmentation creates additional non-copper-clad areas within the copper-clad regions, transforming the uniform isolation gap structure into a multi-level gap system that achieves both force equalization and distance uniformity simultaneously
Solution Approach 2:
Balance gaps are selectively introduced in copper sheets with larger widths rather than uniformly across all copper sheets. This local modification approach adjusts the copper foil weight distribution in specific regions where it is excessively large, while maintaining the original structure in regions where it is already appropriate, thereby achieving overall uniformity without unnecessary modifications
2Device complexity
If copper sheets are made with uniform width according to average magnetic field intensity, then force distribution is simplified, but copper foil weight distribution becomes seriously uneven leading to sound distortion
Solution Approach 1:
Copper sheets with excessive width are segmented into multiple narrow strips by introducing balance gaps. This segmentation reduces the copper foil weight in specific regions while maintaining the overall copper sheet structure, thereby eliminating the cause of sound distortion without requiring complete redesign of all copper sheets
Solution Approach 2:
The width parameter of copper sheets is locally modified by introducing balance gaps in specific copper sheets. This changes the effective copper foil weight distribution from seriously uneven to uniformly distributed, eliminating sound distortion while maintaining the simplicity of the overall design approach
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 sound distortion by ensuring consistent distance and force distribution across the diaphragm, enhancing the smoothness and stability of the diaphragm assembly during vibration.
Implementation Method 1
a circuit pattern is fixedly arranged on the diaphragm body, the circuit pattern includes a plurality of copper sheets arranged in a one-to-one correspondence with the plurality of magnetized areas
Data Source
AI summary
Disclosed are a diaphragm assembly and a loudspeaker. The diaphragm assembly includes a diaphragm body and a circuit pattern fixedly arranged on the diaphragm body. The diaphragm body is provided with a plurality of magnetized areas. The circuit pattern includes a plurality of copper sheets arranged in a one-to-one correspondence with the magnetized areas, and an isolation gap is arranged between two adjacent copper sheets of the plurality of copper sheets. At least part of the plurality of copper sheets is provided with a plurality of balance gaps arranged in a width direction of the part of the plurality of copper sheets, and each of the part of the plurality of copper sheets is divided into a plurality of narrow strips.