Speaker Diaphragm Conductive Paths to Eliminate Lead Breakage
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Solution Overview
Problem
Existing speaker designs face issues with lead collisions causing breakage and increased manufacturing complexity due to the use of leads or FPCs for connecting the voice coil, leading to higher costs.
Innovation Solution
A sounding device with a diaphragm having at least two spaced conductive portions, a bracket supporting the diaphragm, and a voice coil connected via these conductive portions, eliminating the need for leads or FPCs, and utilizing conductive particles in linear and sheet structures for enhanced conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If leads are used to connect the voice coil, then electrical connection is achieved, but lead collision causes breakage and noise
Solution Approach 1:
The patent removes the lead component entirely from the speaker system. Instead of using traditional leads to connect the voice coil to external circuits, the invention integrates the conduction function directly into the diaphragm structure, which already serves as the vibration element. This extraction of the lead eliminates the collision and breakage issues associated with traditional lead connections.
Solution Approach 2:
The patent merges the conduction function with the diaphragm structure. The diaphragm is designed to include both vibration functionality and electrical conduction capability, combining two previously separate functions (mechanical vibration and electrical connection) into a single integrated component. This reduces the number of separate parts and eliminates the need for leads.
2Reliability
If FPC is used to connect the voice coil, then electrical connection is achieved, but manufacturing process becomes complex and cost increases
Solution Approach 1:
The patent combines the diaphragm and conduction path into a single integrated structure. By making the diaphragm itself conductive through embedded conductive particles or conductive layer, the invention eliminates the need for separate FPC components and their associated mounting, wiring, and assembly processes, thereby simplifying manufacturing.
Solution Approach 2:
The diaphragm is designed to serve multiple functions simultaneously: it acts as the vibration element for sound production and as the electrical conduction path for signal transmission. This multi-functionality reduces the overall component count and simplifies the manufacturing process by eliminating the need for separate FPC components.
3Device complexity
If conventional diaphragm structure is used, then simple structure is maintained, but electrical conduction path is insufficient
Solution Approach 1:
The patent employs composite material structures for the diaphragm, incorporating conductive particles (such as metal particles or carbon particles) into the diaphragm material matrix. This creates a composite diaphragm that maintains the mechanical properties needed for vibration while providing sufficient electrical conduction capability. The composite structure achieves both structural integrity and electrical functionality without requiring complex separate conduction paths.
Solution Approach 2:
The patent applies conductive materials or conductive particles specifically in the regions of the diaphragm where electrical conduction is needed, rather than making the entire diaphragm uniformly conductive. This localized approach maintains structural simplicity while providing adequate electrical conduction paths from the voice coil attachment points to the external connection points.
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 solution provides a simpler electrical path, reduces manufacturing costs, and enhances durability by minimizing lead-related issues and optimizing conductivity, resulting in a more reliable and cost-effective speaker design.
Implementation Method 1
The speaker generates sound by providing electrical signals to a voice coil arranged in a magnetic field. When current passes through the voice coil, the voice coil vibrates due to Lorentz force, thereby driving a diaphragm and a dome connected to the voice coil to produce sound.
Data Source
AI summary
Provided is a sounding device, including a diaphragm, a bracket, a magnetic circuit system, and a voice coil. The bracket surrounds the diaphragm and supports the diaphragm. The magnetic circuit system forms a magnetic gap area. The voice coil is arranged in the magnetic gap area and drives the diaphragm to vibrate. The diaphragm includes at least two conductive portions spaced apart from each other, the bracket is connected to the conductive portions, and the voice coil is electrically connected to an external power source via the conductive portions.