Multi-Coil Speaker Magnetic Circuit Assembly for Improved Venting
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Solution Overview
Problem
Existing speakers face issues of poor venting and low magnetic circuit conversion efficiency due to limited size and design, affecting sound quality and mechanical quality factor (Q value).
Innovation Solution
A speaker design featuring multiple magnetic circuit assemblies with shared first magnets, varying voice coil sizes, and strategically placed vent grooves to enhance air exhaust and magnetic field strength, along with a basket component and yoke structure for improved support and assembly precision.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a five magnetic circuit system is used, then magnetic field strength is improved, but venting performance deteriorates and acoustic impedance increases
Solution Approach 1:
The magnetic circuit system is segmented into multiple independent magnetic circuit assemblies, each with its own magnetic circuit. This segmentation allows each assembly to be optimized for both magnetic field generation and venting performance, resolving the contradiction between strong magnetic field and poor venting in traditional five magnetic circuit systems
Solution Approach 2:
Each magnetic circuit assembly is designed with localized optimization: the magnetic circuit structure is enhanced locally to provide strong magnetic field, while the vent groove is specifically positioned and dimensioned to ensure adequate venting. This local quality approach allows simultaneous optimization of magnetic field strength and venting performance
2Weight of moving object
If speaker size is limited, then device lightness and thinness are improved, but sound quality deteriorates
Solution Approach 1:
The patent transitions from traditional single-dimension size optimization to multi-dimensional configuration. By arranging multiple magnetic circuit assemblies in spatial distribution and optimizing the three-dimensional structure of vent grooves and voice coils, the system achieves high sound quality within limited thickness constraints
Solution Approach 2:
The patent optimizes multiple parameters simultaneously: voice coil size and position, magnetic circuit assembly configuration, vent groove dimensions and positioning, and diaphragm characteristics. These parameter changes are coordinated to achieve optimal sound quality while maintaining compact size and light weight
3Use of energy by moving object
If multiple magnetic circuit assemblies are used, then magnetic circuit conversion efficiency is improved, but device complexity increases
Solution Approach 1:
Each magnetic circuit assembly is designed as a universal module that performs multiple functions: generating magnetic field, providing venting pathway, and supporting voice coil. This multi-functionality reduces the need for separate components, thereby reducing overall structural complexity despite using multiple assemblies
Solution Approach 2:
The patent merges the vent groove with the magnetic circuit assembly structure, integrating the venting function into the magnetic circuit itself rather than adding separate venting components. This merging approach maintains high magnetic circuit conversion efficiency while minimizing the increase in device complexity
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 sound quality by increasing venting efficiency, reducing segmented vibrations, and enhancing magnetic field strength, resulting in better sound fidelity and mechanical quality factor (Q value).
Implementation Method 1
a diaphragm assembly, where the diaphragm assembly includes at least two voice coils; and a magnetic circuit assembly, where the magnetic circuit assembly includes first magnets and a second magnet
Implementation Method 2
a vent groove is disposed between two adjacent first magnets
Implementation Method 3
a magnetic circuit assembly, where the magnetic circuit assembly includes first magnets and a second magnet
Data Source
AI summary
A speaker includes a diaphragm assembly and a magnetic circuit assembly. The diaphragm assembly includes at least two voice coils. The magnetic circuit assembly includes first magnets and a second magnet. A plurality of first magnets are disposed around the second magnet. A vent groove is disposed between two adjacent first magnets. The voice coil is disposed between the second magnet and the first magnet. The speaker includes at least two magnetic circuit assemblies. The magnetic circuit assembly is disposed corresponding to the voice coil. Two adjacent magnetic circuit assemblies share a same first magnet.