Dual-Suspension Micro-Speaker Structure for Vibration Isolation
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Solution Overview
Problem
The challenge in designing acoustic devices is the transmission of speaker diaphragm vibrations to the electronic product, leading to noise generation due to limited internal space.
Innovation Solution
A micro-speaker with a dual suspension system, comprising a first suspension system through a diaphragm and surround connection, and a second suspension system via a one-piece elastic member connecting the yoke and frame, without direct contact, using an integrally formed elastic member with inner and outer ring structures and cantilevers for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If a traditional speaker structure is used, then the speaker can produce sound, but the diaphragm vibration is transmitted to the electronic product generating noise
Solution Approach 1:
The patent introduces a damping ring as an intermediary component between the speaker diaphragm and the electronic product housing. This damping ring absorbs and isolates the vibrations generated by the diaphragm, preventing them from being transmitted to the housing and reducing noise. The damping ring acts as a mediator that decouples the vibration source from the structure that would amplify it.
Solution Approach 2:
The patent employs a dual suspension system with damping elements that are pre-installed to cushion and absorb vibrations before they can be transmitted to the electronic product housing. The first damping element is positioned between the diaphragm and the housing, while the second damping element is integrated into the frame structure, providing advance vibration isolation.
2Volume of moving object
If the internal space of electronic products is limited, then the device size is compact, but designing an effective vibration-absorbing structure becomes challenging
Solution Approach 1:
The patent merges the vibration absorption function with the existing speaker frame structure by integrating a damping ring into the frame. This combination allows the frame to serve dual purposes: structural support and vibration damping. The damping ring is formed as part of the frame structure, eliminating the need for separate vibration-absorbing components and reducing overall device complexity.
Solution Approach 2:
The frame structure is designed to perform multiple functions simultaneously: it provides structural support for the speaker components and incorporates vibration-damping features through the integrated damping ring. This multi-functional design allows effective vibration absorption within the limited internal space without requiring additional dedicated vibration-absorbing structures.
3Object-generated harmful factors
If a dual suspension system is implemented, then vibration absorption is improved, but the structural complexity increases
Solution Approach 1:
The patent combines multiple damping functions into a single integrated damping ring structure that is formed as part of the frame. The damping ring incorporates both the first damping element (between diaphragm and housing) and the second damping element (in the frame structure), merging what would otherwise be separate components into one unified structure. This reduces the number of parts while maintaining dual suspension functionality.
Solution Approach 2:
The damping ring is designed with flexible, elastic material properties that allow it to deform and absorb vibrations dynamically. The ring structure can flex and return to its original shape, providing continuous vibration damping without requiring complex mechanical mechanisms. This flexible design simplifies the overall suspension system while maintaining effective vibration absorption.
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 dual suspension system effectively absorbs vibrations, reducing noise transmission and enhancing stability, while allowing for efficient sound production in confined electronic product spaces.
Implementation Method 1
a one-piece elastic member flexibly connected to a first surface of a bottom of the yoke and a bottom surface of the frame, thereby forming a second suspension system
Implementation Method 2
a voice coil sleeved on an outer periphery of the main magnetic portion and penetrates into the magnetic gap, wherein one end of the voice coil is fixedly connected to the diaphragm
Data Source
AI summary
A micro-speaker includes a frame and a drum paper including a diaphragm and a surround. The diaphragm is flexibly connected to one end of the frame via the surround, thereby forming a first suspension system. A magnetic structure includes a main magnetic portion and a yoke covering and surrounding the main magnetic portion. A magnetic gap is provided between the main magnetic portion and a folded portion of the yoke. A voice coil is sleeved on an outer periphery of the main magnetic portion and penetrates into the magnetic gap. One end of the voice coil is fixedly connected to the diaphragm. A one-piece elastic member is flexibly connected to a first surface of a bottom of the yoke and a bottom surface of the frame, thereby forming a second suspension system.