Multi-Voice-Coil Speaker Connection Using Conductive Gel
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Solution Overview
Problem
Existing speakers face issues with long voice coil wires that are prone to breakage and occupy space, affecting the magnetic circuit volume and performance, particularly when multiple voice coils are used.
Innovation Solution
The use of a conductive gel to connect at least two voice coils and a conductive member, with an insulating coating between the gel and diaphragm, replacing traditional voice coil wires and FPC connections, enhancing electrical stability and reducing magnetic circuit volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple voice coils are connected through voice coil wires and FPC, then the BL value and sensitivity are enhanced, but the voice coil wires become too long and easy to break, and the FPC takes up more space affecting the magnetic circuit volume
Solution Approach 1:
The patent removes the FPC and voice coil wires from the connection structure, extracting the problematic elements that caused breakage and space occupation. The conductive gel directly connects the voice coils to the magnetic circuit system without intermediate wiring components, thereby improving reliability and reducing structural complexity.
Solution Approach 2:
The conductive gel serves as an intermediary substance that provides electrical connection between the voice coils and the magnetic circuit system. This gel-based mediator replaces the traditional wire-FPC connection system, eliminating the breakage issues associated with long wires and the space consumption of FPC while maintaining electrical conductivity.
2Reliability
If FPC is used to connect voice coils, then electrical connection is achieved, but the FPC takes up more space which will affect the volume of the magnetic circuit
Solution Approach 1:
The FPC is completely removed from the system. Instead of using a rigid flexible printed circuit board that occupies significant space, the patent employs conductive gel that can be applied directly in the required locations, thereby achieving electrical connection without the space-consuming FPC structure.
Solution Approach 2:
The connection medium changes from a rigid FPC with fixed geometry to a flexible conductive gel that can conform to the magnetic circuit system's space constraints. This parameter change in the connection medium's physical state allows for optimized space utilization within the magnetic circuit volume.
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 improves the BL value and vibration sensitivity, stabilizes electrical connections, and enhances acoustic performance by avoiding breakage risks and optimizing magnetic circuit space.
Implementation Method 1
The at least two voice coils are connected to each other via a conductive gel and/or the at least two voice coils are connected to the conductive member via the conductive gel
Implementation Method 2
The voice coil drives the diaphragm to vibrate and produce sound via a magnetic field
Data Source
AI summary
A speaker includes a frame, a vibration system fixed with the frame, and a magnetic circuit system driving the vibration system to vibrate and sound. The vibration system includes a diaphragm fixed with the frame, at least two voice coils driving the diaphragm to vibrate and sound, and a conductive member. The at least two voice coils are connected to each other via a conductive gel and/or the at least two voice coils are connected to the conductive member via the conductive gel, the conductive gel is affixed to the diaphragm, and an insulating coating is located between the conductive gel and the diaphragm. Compared with the related art, the stability of the electrical connection of the at least two voice coils could be enhanced, and the acoustic performance of the speaker could also be improved.