Micro-Speaker Dual Suspension System for Vibration Isolation
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Solution Overview
Problem
Designing an effective vibration-absorbing structure for micro-speaker units within limited internal spaces of electronic products to prevent noise transmission from the speaker diaphragm's vibration.
Innovation Solution
A micro-speaker device with a dual suspension system, comprising a first suspension system formed by a flexibly connected diaphragm and surround, and a second suspension system using a one-piece elastic member connected to the yoke and frame, along with dampers and a voice coil, to absorb vibrations and reduce noise transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vibration-absorbing structure is added to the speaker unit, then noise transmission is reduced, but the internal space requirement increases
Solution Approach 1:
The patent combines the vibration-absorbing function with the existing structural components of the speaker unit. The first suspension system integrates the diaphragm, voice coil, and magnetic structure to provide vibration absorption at the source. The second suspension system merges the support function with vibration isolation by using elastic members to connect the magnetic structure to the frame. This merging approach allows vibration absorption without adding separate dedicated vibration-absorbing components that would increase internal space requirements.
Solution Approach 2:
The suspension systems in the patent serve multiple functions simultaneously. The first suspension system not only supports the diaphragm and voice coil assembly but also absorbs vibrations generated during operation. The second suspension system both supports the magnetic structure and isolates its vibrations from the frame. This multi-functionality reduces the need for additional components, thereby maintaining compact internal space while effectively reducing noise transmission.
2Object-affected harmful factors
If a dual suspension system is implemented, then vibration absorption is improved, but device complexity increases
Solution Approach 1:
The patent divides the vibration absorption function into two distinct but complementary suspension systems. The first suspension system handles vibrations at the diaphragm and voice coil level, while the second suspension system handles vibrations at the magnetic structure level. This segmentation allows each system to be optimized for its specific function and location, making the overall complex system manageable through modular functional division.
Solution Approach 2:
Each suspension system is designed with specific local characteristics suited to its function. The first suspension system uses the diaphragm, surround, and voice coil arrangement optimized for diaphragm support and vibration absorption. The second suspension system uses elastic members with specific material properties and geometric configurations optimized for magnetic structure support and vibration isolation. This local quality optimization ensures effective vibration absorption at each level while maintaining clarity in the overall system architecture.
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 improving the stability and sound production of the micro-speaker device, while allowing for efficient assembly and operation within compact electronic product spaces.
Implementation Method 1
a one-piece elastic member flexibly connected to a first surface of a bottom of the yoke and the bottom surface of the frame, thereby forming a second suspension system
Implementation Method 2
at least one damper flexibly connecting a bottom of the voice coil and a bottom surface of the frame
Data Source
AI summary
The invention discloses a micro-speaker device including a frame, and a drum paper having a diaphragm and a surround. The diaphragm is flexibly connected to one end of the frame through the surround, thereby forming a first suspension system. A magnetic circuit structure includes a main magnetic portion and a yoke 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 fixed to the diaphragm. Two dampers flexibly connect the bottom of the voice coil and the bottom surface of the frame. A one-piece elastic member flexibly connects the first surface of the bottom of the yoke and the bottom surface of the frame to form a second suspension system.