Speaker Magnetic Circuit With Suspension For Balanced Vibration
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Solution Overview
Problem
Miniaturization of speakers in portable electronic devices leads to unbalanced vibration systems, limiting sound quality due to reduced power requirements, as the voice coil is fixedly supported by the diaphragm and prone to unbalanced vibrations.
Innovation Solution
The speaker design incorporates a magnetic circuit system with a second magnet and a suspension mechanism that stabilizes the vibration system by creating a magnetic gap and using a suspension with fastening slots to secure the coil assembly, ensuring balanced vibrations and improved power handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the speaker is miniaturized to adapt to portable electronic devices, then the device size is reduced, but the acoustic performance deteriorates due to unbalanced vibration and limited power
Solution Approach 1:
The magnetic circuit system is divided into multiple magnetic components (magnet, upper magnetic conductive plate, lower magnetic conductive plate) that are spatially segmented to create distinct magnetic regions. This segmentation allows independent optimization of each component's function while maintaining overall compactness, resolving the contradiction between miniaturization and power handling capability
Solution Approach 2:
The patent introduces a vertical dimension to the magnetic circuit design by stacking magnetic components (upper and lower magnetic conductive plates) to create a three-dimensional magnetic field distribution. This dimensional approach increases power handling capability without significantly increasing the horizontal footprint, thus maintaining miniaturization while improving acoustic performance
2Device complexity
If the voice coil is fixedly supported by the diaphragm to simplify structure, then the device complexity is reduced, but the vibration balance deteriorates causing unbalanced vibration
Solution Approach 1:
The coil support structure serves as an intermediary component between the diaphragm and the voice coil. It provides a dedicated mounting platform that mechanically couples the voice coil to the diaphragm assembly while maintaining proper spatial relationships. This intermediary structure ensures balanced vibration transmission without requiring complex support mechanisms
Solution Approach 2:
The coil support structure merges multiple functions into a single component: it provides mechanical support for the voice coil, maintains the magnetic gap spacing, and serves as part of the vibration transmission path to the diaphragm. This consolidation simplifies the overall structure while ensuring vibration balance through integrated design
3Volume of moving object
If the magnetic circuit system is compacted to maintain miniaturization, then the speaker volume is reduced, but the magnetic field distribution becomes unbalanced affecting sound quality
Solution Approach 1:
The upper and lower magnetic conductive plates provide locally optimized magnetic flux paths at different positions within the compact magnetic circuit. The upper plate focuses flux in the upper magnetic gap region while the lower plate addresses the lower gap region, ensuring balanced magnetic field distribution throughout the compact volume without requiring increased overall size
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 enhances the acoustic performance of the speaker by stabilizing the vibration system, allowing for increased power and improved sound quality while maintaining compactness.
Implementation Method 1
a magnetic circuit system (20) for interacting with the vibration system (10) to produce sounds
Implementation Method 2
The coil assembly (12) is partially inserted into the magnetic gap. When electrified, the coil assembly (12) will be activated to vibrate by the magnetic field produced by the magnetic circuit system (20)
Implementation Method 3
A projection of the first oblique portion (224) along a direction perpendicular to the vibration direction locates at least partially on the coil wire (14)
Data Source
AI summary
The speaker provided by the present invention includes a magnetic circuit system. The magnetic circuit system includes an upper magnetic conductive plate, and a lower magnetic conductive plate. The magnet includes a first magnet mounted on a center of the lower magnetic conductive plate and facing the diaphragm, and a second magnet mounted on the lower magnetic conductive plate and surrounding the first magnet. The upper magnetic conductive plate includes a first horizontal portion engaging with the second magnet, and a first oblique portion extending obliquely from the first horizontal portion. The speaker further includes a suspension sandwiched between the upper magnetic conductive plate and the second magnet for improving the stability of the vibration of the diaphragm and the balance of the vibration, and thus improves the power of speaker.