Dual-Magnetic Sound Module Layout for Thin Dipole Speakers
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Solution Overview
Problem
Conventional DiPole Speakers (DPS) require excessive thickness due to dual diaphragms and magnetic circuit units, leading to high breakage rates, increased material costs, and reduced reliability, making thin and lightweight designs challenging.
Innovation Solution
A sound module with a dual magnetic circuit design, where magnetic circuit units are distributed horizontally, and vibration units occupy only two vibration spaces, combined with a folded ring and integrated voice coil structure, to achieve a thin and reliable design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional DiPole Speaker integrates two sets of vibration systems through shared magnetic circuit, then sound output capability is improved, but thickness space occupation increases significantly
Solution Approach 1:
The patent transitions from a vertical stacked arrangement (conventional DPS) to a horizontal planar distribution of magnetic circuit units. Multiple magnetic circuit units are arranged side-by-side along the width direction rather than stacking them vertically, thereby reducing thickness occupation while maintaining sound output capability through distributed vibration systems.
Solution Approach 2:
The magnetic circuit system is divided into multiple independent magnetic circuit units distributed horizontally. Each unit contains its own magnets, washers, and yokes, allowing parallel operation of multiple vibration systems without requiring excessive thickness space. This segmentation enables the speaker to achieve enhanced sound output through distributed channels rather than vertical stacking.
2Length of stationary object
If magnetic circuit unit thickness is reduced to achieve thin design, then product thickness decreases, but breakage rate during transportation and handling increases
Solution Approach 1:
Instead of reducing the thickness of individual magnetic circuit units (which increases breakage risk), the patent distributes multiple complete magnetic circuit units horizontally. Each unit maintains sufficient thickness for structural integrity, while the overall speaker thickness is controlled through planar arrangement, thus avoiding the breakage issues associated with thinning critical components.
Solution Approach 2:
Multiple magnetic circuit units are merged into a single horizontal assembly, where each unit retains its full structural thickness for reliability. The combination of multiple units achieves the thin speaker design goal without compromising the structural integrity of individual magnetic circuit components, thereby maintaining low breakage rates during handling and transportation.
3Power
If input voltage is increased to maintain low frequency performance in thin design, then product performance at low frequency is maintained, but vibration space requirements increase
Solution Approach 1:
The patent distributes multiple vibration systems horizontally across the speaker width rather than stacking them vertically. This planar arrangement allows each vibration system to operate with adequate vibration space in the vertical direction while maintaining compact overall thickness. The horizontal distribution enables low frequency performance through increased total displacement capacity without requiring excessive vibration space in any single direction.
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 ensures uniform magnetic field distribution, reduces distortion, enhances sound quality, and facilitates mass production by minimizing thickness occupation and material costs while providing far-field noise cancellation for improved call privacy.
Implementation Method 1
the voice coil includes a first voice coil portion and a second voice coil portion located on opposite sides of the vibration plate along the first direction, the first voice coil portion is located in the first magnetic gap of the corresponding magnetic circuit unit, and the second voice coil portion is located in the second magnetic gap of the corresponding magnetic circuit unit
Data Source
AI summary
A sound module includes a housing and a sound unit. The housing includes a housing; and a sound unit. The housing includes a first module housing and a second module housing provided along a first direction, the first module housing and the second module housing are enclosed to form an accommodating cavity. The sound unit is accommodated in the accommodating cavity and forms a front cavity and a rear cavity between the sound unit and the housing; and the sound unit includes a magnetic circuit system and a vibration system. The magnetic circuit system includes a plurality of magnetic circuit units distributed along a second direction, each of the magnetic circuit units includes a first magnetic assembly and a second magnetic assembly spaced apart along the first direction, and the second direction is perpendicular to the first direction.