Coaxial Speaker Magnetic Gap Layout for Low-Frequency Output
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Solution Overview
Problem
Coaxial speakers are limited in low-frequency performance due to the restricted vibration amplitude of the first sounding unit, which primarily emits high-frequency sound.
Innovation Solution
The design incorporates a magnetic circuit system with a first and second sounding unit, where the first sounding unit includes a first diaphragm and voice coil, and the second sounding unit includes a second diaphragm and voice coil, with a magnetic gap configuration involving a first ring magnet and a second ring magnet, and a yoke, enhancing the vibration amplitude and magnetic field for the first sounding unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the first sounding unit is used for emitting high-frequency sound with limited vibration amplitude, then the high-frequency performance is maintained, but the low-frequency performance is limited
Solution Approach 1:
The magnetic circuit system is segmented into multiple magnetic gaps: a first magnetic gap for the first voice coil and a second magnetic gap for the second voice coil. This segmentation allows each sounding unit to operate in its optimal magnetic field region, enabling the first sounding unit to achieve larger vibration amplitudes for low-frequency emission while the second sounding unit maintains high-frequency performance.
Solution Approach 2:
The patent introduces a vertical dimension to the magnetic circuit design by stacking ring magnets (first ring magnet, second ring magnet, third ring magnet) along the axial direction. This creates multiple magnetic gaps at different positions, allowing the first sounding unit to access a stronger magnetic field environment that enables larger vibration amplitudes and low-frequency emission capability.
2Quantity of substance
If the first sounding unit is designed to emit low-frequency sound with large vibration amplitude, then the low-frequency performance is improved, but the high-frequency performance may be compromised
Solution Approach 1:
The magnetic circuit system is divided into distinct first and second magnetic gaps, each serving a specific sounding unit. The first magnetic gap provides strong magnetic field for low-frequency emission, while the second magnetic gap maintains appropriate field strength for high-frequency operation, allowing both frequency ranges to perform reliably without compromising either.
Solution Approach 2:
Different regions of the magnetic circuit system are designed with different magnetic field strengths tailored to specific functions. The first magnetic gap region is optimized for strong magnetic field to enable large vibration amplitudes for low-frequency sound, while the second magnetic gap region is optimized for the specific requirements of high-frequency emission, ensuring each sounding unit operates at its optimal performance level.
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 improved magnetic field and vibration amplitude increase the low-frequency performance of the coaxial speaker by allowing the first sounding unit to emit low-frequency sound, overcoming its previous limitation to high-frequency emission.
Implementation Method 1
a first voice coil and a second voice coil, which are respectively driven by electromagnetic force to vibrate and emit sound
Implementation Method 2
The magnetic circuit system includes a bottom plate provided with a through hole, a ring magnetic unit fixed to the bottom plate, a magnet fixed to the bottom plate and arranged on an outer side of the ring magnetic unit, and a yoke fixed to the magnet
Data Source
AI summary
A coaxial speaker is disclosed. The coaxial speaker includes a magnetic circuit system and two sounding units. The magnetic circuit system includes a ring magnetic unit, a magnet and a yoke arranged on an outer side of the ring magnetic unit, and a first ring magnet sleeved on an insert inserted into an inner side of the ring magnetic unit. Magnetic polarities of the inner and outer surfaces of the first ring magnet are opposite. The first ring magnet together with the ring magnetic unit forms a first magnetic gap for one sounding unit. The ring magnetic unit together with the magnet and the yoke forms a second magnetic gap for another sounding unit. Diaphragms of the two sounding units are fixed to the ring magnetic unit. The coaxial speaker improves the low-frequency performance.