Multi-Magnet Speaker System for Long Voice Coil Sensitivity
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Solution Overview
Problem
Speakers with long and narrow diaphragms and voice coils experience reduced sensitivity due to insufficient magnetic force from traditional straight magnetic circuits.
Innovation Solution
A multi-magnet system is introduced, comprising a yoke with main magnets, a mid-magnet, and auxiliary magnets, creating multiple circular magnetic gaps to enhance magnetic force and balance, allowing for symmetrical and stable magnetic flux density on voice coils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a straight magnetic circuit is used, then the structure is simple, but the magnetic force is insufficient for long and narrow diaphragms and voice coils
Solution Approach 1:
The magnetic circuit is segmented into multiple independent magnets (first main magnet, second main magnet, first auxiliary magnet, second auxiliary magnet) arranged in specific positions. Each magnet generates its own magnetic field, and the combined effect provides sufficient magnetic force for long and narrow voice coils while maintaining a manageable structural complexity through modular segmentation.
2Reliability
If multiple magnets are used to increase magnetic force, then the sensitivity is improved, but the device complexity increases
Solution Approach 1:
The patent extracts and separates the magnetic force generation function into multiple independent magnets positioned at specific locations (front and rear ends, left and right sides). This extraction allows each magnet to contribute independently to the overall magnetic force, improving speaker sensitivity while the modular nature of extracted components keeps the system complexity manageable through functional decomposition.
3Area of stationary object
If the magnetic circuit is extended to cover long and narrow voice coils, then the magnetic force coverage is improved, but the magnetic force density decreases
Solution Approach 1:
The patent applies local quality by positioning multiple magnets at specific strategic locations (front end, rear end, left side, right side) rather than uniformly distributing magnetic force. Each magnet creates a concentrated magnetic field in its local region, ensuring high magnetic force density where needed along the long and narrow voice coil while maintaining adequate coverage through the coordinated arrangement of multiple local magnetic sources.
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 multi-magnet system effectively increases the sensitivity of speakers by providing a stronger magnetic force, ensuring balanced and stable diaphragm vibration.
Implementation Method 1
While electrified, the voice coil will be activated to vibrate by the electromagnetic Ampere Force and further drives the diaphragm to vibrate, which converts the electrical signals to sound waves.
Implementation Method 2
A multi-magnet system is introduced, comprising a yoke with main magnets, a mid-magnet, and auxiliary magnets, creating multiple circular magnetic gaps to enhance magnetic force and balance, allowing for symmetrical and stable magnetic flux density on voice coils.
Data Source
AI summary
Disclosed is a multi-magnet system for speaker. The multi-magnet system includes a yoke having a bottom, a pair of main magnets separated from each other and mounted on the bottom of the yoke, respectively, a mid-magnet mounted on the bottom of the yoke and located between the pair of main magnets, and a pair of auxiliary magnets attached to two ends of the yoke. Wherein, the first main magnet together with the first auxiliary magnet and the mid-magnet defines a first magnetic gap and the second main magnet together with the second auxiliary magnet and the mid-magnet defines a second magnetic gap. By virtue of place the magnets at appropriate locations, the sensitivity of the speaker is effectively enhanced.