Speaker Diaphragm Stiffness Control via Segmented Suspensions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing speakers in portable mobile devices face challenges in adjusting the stiffness of their diaphragm suspensions, leading to uncontrolled vibration and shaking, which affects sound quality and structural design for thinner, lighter forms.
Innovation Solution
A speaker design featuring a diaphragm with distinct inner and outer suspensions of different materials and thicknesses, where the stiffness ratio is adjustable to suppress segmenting vibrations, and a magnetic circuit with auxiliary magnets to enhance magnetic field properties and reduce acoustic resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single diaphragm with inner and outer suspensions is used, then the speaker structure is simple, but the stiffness of the inner and outer suspensions cannot be adjusted independently, causing diaphragm shaking
Solution Approach 1:
The patent divides the single diaphragm into two separate diaphragms (first diaphragm and second diaphragm), each with its own suspension system. This segmentation allows independent adjustment of inner and outer suspension stiffness, resolving the diaphragm shaking issue while maintaining structural simplicity through the modular design
2Length of moving object
If the diaphragm thickness is reduced for thinner portable devices, then the speaker fits better in portable devices, but the magnetic circuit system occupies more space, affecting overall compactness
Solution Approach 1:
The patent employs auxiliary magnets arranged in a specific spatial configuration around the magnetic circuit system. By utilizing three-dimensional spatial arrangement and magnetic field distribution, the design achieves enhanced magnetic properties without increasing the overall speaker thickness, effectively resolving the conflict between thin profile and magnetic circuit volume
3Stability of the object's composition
If different materials and thicknesses are used for inner and outer suspensions, then segmenting vibration can be suppressed, but the manufacturing process becomes more complex
Solution Approach 1:
The patent applies different materials and thicknesses to specific local regions (inner suspension vs. outer suspension) based on their functional requirements. The inner suspension uses one material configuration optimized for its position, while the outer suspension uses another material configuration suited to its location, achieving vibration suppression through localized optimization rather than uniform design
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 effectively reduces diaphragm shaking, improves tone quality, and allows for a thinner, lighter speaker structure suitable for portable devices without collision noise, while maintaining optimal magnetic properties.
Implementation Method 1
a vibrating system composed of a diaphragm and a voice coil
Implementation Method 2
a magnetic circuit system
Data Source
AI summary
The present disclosure provides a speaker, including a frame, a vibrating system and a magnet portion accommodated in the frame, the vibrating system includes a diaphragm and a voice coil which drives the diaphragm to vibrate, the diaphragm includes a first suspension at a central position of the diaphragm, a second suspension at an edge position of the diaphragm and a dome connected between the first suspension and the second suspension, an inner periphery of the first suspension is fixed on the magnet portion, an outer periphery of the first suspension is connected with the dome, an inner periphery of the second suspension is connected with the dome, an outer periphery of the second suspension is fixed on the frame, a stiffness of the first suspension is different from a stiffness of the second suspension. Comparing with the related art, the speaker of the present disclosure guarantees sounding effect.