Rectangular Loudspeaker Diaphragm with Multi-Coil Drive
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Solution Overview
Problem
Traditional loudspeaker units suffer from inefficient sound energy conversion, harmonic distortion, nonlinear movement, and poor heat dissipation, leading to degraded sound quality and potential damage to components.
Innovation Solution
A loudspeaker unit with a rectangular basin-like structure, featuring a suspension system with a spider and corrugated rim, and a magnetic circuit system with a ring-like magnetic gap, where multiple voice coils and magnetic circuit assemblies are connected in series or parallel to drive a membrane with a three-dimensional array structure, enhancing rigidity and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conical membrane is used in traditional loudspeakers, then the structure is simple and easy to manufacture, but the effective vibration area is small and sound energy conversion efficiency is poor
Solution Approach 1:
The patent applies asymmetry by changing the membrane shape from the traditional conical form to a rectangular shape with rounded corners. This asymmetric design increases the effective vibration area while maintaining manufacturing feasibility through standardized production processes, thereby improving sound energy conversion efficiency without sacrificing ease of manufacture.
2Device complexity
If a conical membrane is used, then the structure is simple, but radial and axial split vibrations occur causing harmonic distortion
Solution Approach 1:
The rectangular shape with rounded corners eliminates the symmetry that causes split vibrations in conical membranes. The asymmetric geometry prevents radial and axial split vibrations, thereby reducing harmonic distortion while keeping the overall structure relatively simple.
Solution Approach 2:
The rounded corners of the rectangular membrane provide smooth curvature transitions that reduce abrupt changes in vibration patterns. This curvature design helps minimize split vibrations and harmonic distortion while maintaining structural simplicity.
3Device complexity
If a single engine with external magnet structure is used, then the device complexity is low, but the voice coil experiences nonlinear deviation causing distortion
Solution Approach 1:
The patent segments the single driving engine into multiple independent voice coil assemblies, each with its own magnet and voice coil. This segmentation allows each unit to operate independently with reduced nonlinear deviation, improving movement linearity while increasing overall system complexity in a manageable way.
Solution Approach 2:
Each voice coil assembly is designed with localized optimization, where the magnetic gap and voice coil parameters are tuned for each specific position. This local quality approach ensures uniform vibration across all drive units, improving overall linearity while maintaining individual component simplicity.
4Reliability
If traditional loudspeaker structure is used, then heat dissipation is insufficient, but improving heat dissipation requires structural changes
Solution Approach 1:
The housing is segmented into multiple sections with integrated heat dissipation channels and ventilation openings. This segmentation allows heat to be efficiently conducted away from the voice coils through dedicated pathways while maintaining the overall structural integrity, improving reliability without excessive complexity.
Solution Approach 2:
The housing structure serves multiple functions: it provides mechanical support, acoustic enclosure, and heat dissipation pathways. By making the housing multi-functional, the patent improves heat dissipation capability without adding separate dedicated heat dissipation components, thereby maintaining structural simplicity.
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 improves sound quality by reducing mechanical distortion, nonlinear movement, and heat-related issues, while increasing the efficiency of sound energy conversion and extending the loudspeaker's application range with enhanced heat dissipation and reduced resonances.
Implementation Method 1
the voice coil can vibrate reciprocatively like a piston in an axial direction in the ring-like magnetic gap to push the membrane to vibrate and emit a sound
Data Source
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AI summary
Provided are a speaker unit and a speaker device. A main body of the speaker unit is a rectangular bowl-shaped structure, and comprises a suspension system, a magnetic circuit system having an annular magnetic gap, and a bowl-shaped frame connecting the suspension system and the magnetic circuit system. The bowl-shaped frame accommodates the suspension system and the magnetic circuit system. The magnetic circuit system is fixed to the interior of the bowl-shaped frame. The suspension system comprises a diaphragm and at least one voice coil connected to a bottom portion of the diaphragm. The magnetic circuit system comprises at least one magnetic circuit assembly matching the voice coil. One end of the voice coil is connected to the diaphragm by means of a voice coil frame. The other end of the voice coil is suspended within an annular magnetic gap of the magnetic circuit assembly. The voice coil can perform piston-like reciprocating motion in an axial direction in the annular magnetic gap so as to push the diaphragm to vibrate and emit sound. The present invention employs multiple engines to drive the same diaphragm to vibrate, such that vibration is more uniform and stable, thereby reducing nonlinear vibration, and controlling a magnitude of resistance (RE). The invention has a wide range of applications and an attractive appearance, and realizes efficient heat dissipation.