Dual Layer Speaker Suspension for Signal Reliability
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Solution Overview
Problem
Traditional speaker suspensions are prone to signal interruption due to their single foil structure, which can break and disrupt signal transmission, especially in compact designs required for modern mobile devices.
Innovation Solution
A suspension design featuring dual layer structures with a foil signal transmission layer, a hardness reinforcement layer, and an insulating layer, where the layers are connected through conductive portions to ensure continuous signal transmission even if one layer is broken, utilizing a structure that includes vibrating arms and connecting arms to support the voice coil and film.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single foil signal transmission layer is used in the suspension, then the structure is simple and manufacturing is easy, but the signal transmission is prone to interruption when the foil is broken
Solution Approach 1:
The suspension is divided into multiple independent foil layers (first foil layer and second foil layer), each capable of transmitting signals independently. This segmentation ensures that if one layer is broken, the other can still maintain signal transmission, thereby improving reliability while managing complexity through modular design.
Solution Approach 2:
Different regions of the suspension are assigned different functions: the foil layers provide signal transmission, the hardness reinforcement layer provides structural support, and the insulating layer provides electrical isolation. This local differentiation of qualities allows each layer to optimize its specific function while contributing to the overall system reliability.
2Volume of moving object
If the speaker size is reduced to meet miniaturization requirements, then the device becomes more compact, but the suspension structure becomes more vulnerable to breakage
Solution Approach 1:
The suspension employs a composite structure combining multiple foil layers with different properties: conductive foil layers for signal transmission, hardness reinforcement layers for structural strength, and insulating layers for electrical isolation. This composite approach enables the suspension to maintain high strength and reliability in a compact speaker design.
Solution Approach 2:
The suspension structure is organized as nested layers, with the foil signal transmission layers positioned within the broader structural framework of hardness reinforcement layers and insulating layers. This nested arrangement maximizes the use of space while ensuring that each functional layer is protected and supported by the others, maintaining strength in compact dimensions.
3Length of moving object
If traditional annular suspension is replaced with FPC-based suspension, then conductivity and thin structure are achieved, but the single-layer structure becomes more susceptible to signal interruption
Solution Approach 1:
The single FPC layer is segmented into multiple parallel foil layers, each capable of independent signal transmission. This segmentation maintains the thin overall structure while providing redundancy, so that if one foil layer is damaged, signals can still pass through other layers, ensuring transmission continuity.
Solution Approach 2:
The suspension transitions from a single two-dimensional FPC layer to a multi-layer stacked structure, adding the vertical dimension. This dimensional expansion allows multiple signal transmission paths to be packed into a thin profile, maintaining thinness while improving reliability through layered redundancy.
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 layer structure of the suspension ensures that signal transmission remains intact even if one layer is compromised, enhancing the reliability and durability of the speaker system in compact devices by reducing the risk of signal interruption.
Implementation Method 1
the voice coil member would move in a linear fashion due to the attraction and repulsion between the electromagnetic force formed by the electrical current and the permanent magnet
Data Source
AI summary
Disclosed is a speaker having a suspension. The suspension includes a vibrating arm having at least a pair of layer structures and an insulating layer sandwiched between the two layer structures. Each layer structure has a foil signal transmission layer, a hardness reinforcement layer and a glue layer for connecting the foil signal transmission layer with the hardness reinforcement layer and a conductive portion for electrically connecting the foil signal transmission layers of each of layer structures. The suspension of the disclosure can prevent the signal layer from being broken. The suspension disclosed has at least two layer structures, which makes the signal transmitted in each layer structures at the same time, even if one of the layer structures is broken, the rest of the layer structures can still be working.