Speaker Module Segmented Magnet Design for Thin Profile
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
As electronic devices slim down, the thickness of the magnetic field circuit in speaker modules decreases, leading to deteriorated output characteristics such as sound pressure level due to insufficient magnetic force.
Innovation Solution
A speaker module design incorporating a first magnet surrounded by a second magnet spaced apart, with a conductive wire forming an electrical path through the space between the diaphragm's surround and frame, connecting the coil to an external electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the thickness of the magnetic field circuit is reduced to slim down the speaker module, then the thickness parameter is improved, but the magnetic force and output characteristics deteriorate
Solution Approach 1:
The magnetic field circuit is segmented into multiple magnets arranged in a specific configuration. Instead of using a single thick magnet, the patent employs multiple smaller magnets (including first and second magnets with different polarities) to create the necessary magnetic force within a reduced thickness, thereby resolving the contradiction between thinning the module and maintaining magnetic strength.
Solution Approach 2:
The patent transitions from a single-dimensional thickness reduction approach to a multi-dimensional magnetic field configuration. By arranging magnets in specific spatial patterns (including radial and axial arrangements) and optimizing the magnetic circuit path in multiple dimensions, the design achieves sufficient magnetic force without increasing the overall thickness of the speaker module.
2Length of moving object
If the thickness of the magnetic field circuit is reduced to slim down the speaker module, then the thickness parameter is improved, but the output characteristics (sound pressure level) deteriorate
Solution Approach 1:
The magnetic field circuit is segmented into multiple magnets arranged in a specific configuration. Instead of using a single thick magnet, the patent employs multiple smaller magnets (including first and second magnets with different polarities) to create the necessary magnetic force within a reduced thickness, thereby resolving the contradiction between thinning the module and maintaining magnetic strength.
Solution Approach 2:
The patent optimizes multiple parameters including magnet arrangement patterns, magnetic polarity configurations, and magnetic circuit path lengths to maximize output characteristics within a thin profile. By carefully adjusting these parameters, the design achieves high sound pressure level despite the reduced thickness of the magnetic field circuit.
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
Improves magnetic field efficiency, reducing the degradation of output characteristics and enabling the speaker module to be slimmed down while maintaining sound quality.
Implementation Method 1
a coil attached to a diaphragm, the coil being disposed in a space between the first magnet and the second magnet
Implementation Method 2
a first magnet disposed between the yoke and the diaphragm, a second magnet substantially surrounding the first magnet and disposed to be spaced apart from the first magnet
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
According to an embodiment of the present disclosure, an electronic device including a speaker module may include a housing and a speaker module accommodated in the housing. The speaker module, according to an embodiment, may include a yoke configuring one surface of the speaker module, a diaphragm configuring another surface of the speaker module, a frame configuring a lateral surface of the speaker module, a first magnet disposed between the yoke and the diaphragm, a second magnet substantially surrounding the first magnet and spaced apart from the first magnet, a coil attached to an area of the diaphragm, the area substantially corresponding to a space between the first magnet and the second magnet, and a conductive wire configured to provide power to the coil. The conductive wire of the speaker module according to an embodiment may include a first wire part extending from the coil toward the frame, a second wire part extending from the first wire part toward the yoke, and a third wire part extending from the second wire part toward the frame. Various other embodiments may be made in addition to various embodiments disclosed in the present document.