Micro-speaker Frame with Laser Direct Structured Conductive Blocks
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Solution Overview
Problem
Conventional micro-speakers face challenges in maintaining stable electrical connections due to the need for smaller contacts to accommodate a heavier magnetic circuit unit, which can lead to connection breakage during vibration, compromising low-frequency sound performance and space efficiency.
Innovation Solution
The micro-speaker design incorporates a frame with blocks treated using the Laser Direct Structuring (LDS) process, allowing for conductive paths within the frame itself, eliminating the need for separate contacts and ensuring stable electrical connections while optimizing space for the magnetic circuit unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the magnetic circuit unit is made heavier to improve low frequency sound performance, then the low frequency sound performance is improved, but the space inside the micro-speaker is occupied and contacts must be designed smaller
Solution Approach 1:
The patent merges the electrical connection function into the frame structure itself. The frame includes conductive blocks that serve as both structural support and electrical contacts, eliminating the need for separate contact components. This integration allows the magnetic circuit unit to be heavier without compromising space efficiency, as the frame's conductive blocks provide stable electrical connections while maintaining structural integrity.
2Volume of moving object
If contacts are designed smaller to accommodate heavier magnetic circuit unit, then space is optimized, but the electrical connection becomes unstable and easily broken during vibration
Solution Approach 1:
The frame's conductive blocks are integrated directly into the structural frame, providing both mechanical support and stable electrical connections. This merging ensures that the electrical connections are not separate fragile components but are instead reinforced by the frame's structure, preventing connection breakage during vibration while maintaining compact space utilization.
Solution Approach 2:
The frame includes specific conductive blocks at strategic locations where electrical connections are needed. These blocks are made of conductive material and are positioned to provide stable electrical contact points within the frame structure, ensuring reliable connections without requiring additional separate contact components.
3Ease of manufacture
If separate contacts are used to connect vibration unit to external signal source, then electrical connection is provided, but the connection is fragile and breaks during vibration
Solution Approach 1:
The patent eliminates separate contact components by integrating electrical connection functionality into the frame structure. The conductive blocks within the frame provide both structural support and stable electrical connections, removing the fragility issue associated with separate contact components while maintaining ease of manufacture through a more unified 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 configuration enhances the stability of electrical connections and maintains space efficiency, enabling improved low-frequency sound performance and reduced risk of connection breakage, while maintaining a compact size for miniature applications.
Implementation Method 1
a voice coil 13, a diaphragm 14... The voice coil 13 is disposed in the magnetic gap 124
Implementation Method 2
The blocks 113 are treated by LDS process to have an ability of conduct electricity
Data Source
AI summary
A micro-speaker is disclosed. The micro-speaker includes a frame, a magnetic circuit unit in the frame, a diaphragm, and a voice coil connected to the diaphragm. The frame includes a plurality of blocks for positioning the magnetic circuit unit. The voice coil includes a pair of lead wires. The block has an upper surface, a side surface and a bottom surface treated by laser direct structuring process for electrically connecting to the lead wires of the voice coil.