Coaxial Speaker Magnetic Layout for Reduced Height
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Solution Overview
Problem
Coaxial speakers in the related art have excessive product height due to stacked sounding units and separate magnetic circuit systems, leading to increased cost and reduced market competitiveness.
Innovation Solution
A coaxial speaker design with a magnetic circuit system featuring a first and second magnetic unit spaced apart, forming magnetic gaps for first and second sounding units, and a first sounding unit surrounding a second sounding unit, reducing product height and improving structural utilization while lowering magnetic circuit costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two sounding units are stacked in height direction, then each sounding unit can have individual magnetic circuit system, but product height becomes excessive
Solution Approach 1:
The patent implements nesting by placing the second sounding unit (mid-low frequency) inside the first sounding unit (high frequency) along the same axis. The second diaphragm is positioned within the cone formed by the first diaphragm, and the second magnetic unit is arranged on the inner side of the first magnetic unit. This nested configuration allows both sounding units to share space efficiently, dramatically reducing the overall product height while maintaining separate magnetic circuit systems for each unit.
2Reliability
If each sounding unit has individual magnetic circuit system, then each unit can be independently optimized, but magnetic circuit system cost becomes excessive
Solution Approach 1:
The patent merges components between the two magnetic circuit systems by sharing common elements. Specifically, the bottom plate serves both magnetic units, the first yoke includes an extension part that forms part of the second magnetic unit's structure, and the third yoke is attached to the third magnet within the second magnetic unit. This merging reduces the total number of separate components, lowering manufacturing cost while maintaining independent magnetic gaps for each sounding unit to ensure reliable sound emission performance.
3Length of stationary object
If first sounding unit surrounds second sounding unit coaxially, then product height is reduced, but magnetic circuit system structure becomes more complex
Solution Approach 1:
The patent segments the magnetic circuit system into distinct first and second magnetic units, each with dedicated magnets and yokes, while using spatial segmentation to arrange them coaxially. The first magnetic unit includes first and second magnets with first and second yokes, while the second magnetic unit includes third and fourth magnets with third and fourth yokes. This segmentation allows the surrounding configuration to be achieved through systematic arrangement of modular components, making the complex structure more manageable and manufacturable.
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 achieves a reduced product height and lower magnetic circuit costs by optimizing the magnetic circuit system structure, enhancing market competitiveness.
Implementation Method 1
a first voice coil locating in the first magnetic gap and driving the first diaphragm for vibrating and emitting sounds
Implementation Method 2
The magnetic circuit system includes a bottom plate, a first magnetic unit and a second magnetic unit
Data Source
AI summary
A coaxial speaker is provided, including a first sounding unit, a second sounding unit coaxial with and surrounded by the first sounding unit, and a magnetic circuit system including a first magnetic unit and a second magnetic unit spaced apart from the first magnetic unit for forming a first magnetic gap for the first sounding unit. The second magnetic unit includes a second magnet, a second yoke attached to the second magnet, a third magnet attached to the second yoke, and a third yoke attached to the third magnet. The second yoke includes an annular plate sandwiched between the second magnet and the third magnet, and a bending portion. The third magnet and the third yoke are spaced apart from the bending portion for forming a second magnetic gap for the second sounding unit. The coaxial speaker reduces a product height and a magnetic circuit system cost.