Flat Speaker Membrane With Parallel Coils and PCB Wiring
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Solution Overview
Problem
Existing speaker devices face challenges in achieving cost efficiency and simplified manufacturing while maintaining high-quality sound production, particularly in integrating multiple coils effectively with a driver system.
Innovation Solution
A membrane unit comprising a flat membrane with parallel coils, where the membrane acts as both a wiring support element and a diaphragm, with embedded or arranged wiring for efficient routing and mechanical connection to coils, potentially using a printed circuit board (PCB) for robust and simplified design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple coils are integrated with a driver system in conventional speaker devices, then sound production quality is maintained, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent combines multiple voice coils and the driver system into a single integrated membrane unit assembly. The membrane serves as a common support structure for multiple coils, and the driver system is designed to interact with multiple coils simultaneously through a unified magnetic assembly, reducing the number of separate components and simplifying integration.
Solution Approach 2:
The membrane in the patent serves multiple functions: it acts as a structural support for mounting multiple voice coils, provides a common diaphragm for sound production, and serves as a wiring support element. This multi-functionality reduces the need for separate components and simplifies the overall device structure.
2Reliability
If conventional wiring methods are used for multiple coils, then electrical connections are established, but wear from vibrations increases and routing becomes complex
Solution Approach 1:
The patent integrates the wiring support function directly into the membrane structure itself. The membrane includes embedded wiring or wiring traces that are permanently attached to the coil assemblies, eliminating the need for separate wiring harnesses and reducing wear from relative motion between wiring and coils.
Solution Approach 2:
The membrane acts as a flexible wiring support element that can accommodate vibrations and movements while maintaining electrical connections. The thin film structure of the membrane allows it to flex with the coils during operation, reducing stress and wear on the wiring connections.
3Adaptability or versatility
If separate components are used for membrane and wiring support, then functional requirements are met, but component count and manufacturing complexity increase
Solution Approach 1:
The membrane is designed to simultaneously serve as the diaphragm for sound production, the structural support for mounting multiple voice coils, and the wiring support element. This consolidation of functions into a single component reduces the total number of parts while maintaining all necessary functional capabilities.
Solution Approach 2:
The patent merges the membrane and wiring support into a single integrated structure. The wiring is either embedded within the membrane or attached to its surface, creating a unified component that performs both mechanical support and electrical connection functions, thereby reducing assembly steps and component count.
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 simplifies the interaction of coils with the driver system, minimizes wear from vibrations, and allows for optimal sound production with a reduced component count and complexity, enhancing the robustness and ease of manufacturing of speaker devices.
Implementation Method 1
A coil for the speaker is formed with a coil tracing pattern formed on one or more layers of a PCB. One or more amplifier circuits may be included to drive one or more coil patterns, to cause a fluctuating magnetic field in the direction perpendicular to the vibrating portion of the tactile membrane. The vibrating portion of the tactile membrane responds to the fluctuations in the magnetic field, causing audible sounds to be output.
Data Source
AI summary
Membrane unit for a speaker device, the membrane unit comprising a membrane and at least two coils. The respective longitudinal axes of the at least two coils are arranged in parallel along a main axis, a main surface being formed perpendicular to the main axis. The at least two coils are positioned adjacent to each other and mechanically connected to the membrane, the membrane being substantially flat and having a major surface parallel to the main surface. Wiring to the at least two coils is provided at least partly on a flat part of the membrane.