Dual Damper Speaker System for Miniaturization and Polarization Control
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Solution Overview
Problem
The miniaturization of speaker products is limited by the need for space to accommodate the vibration of lead wires connected to voice coils, and existing dampers fail to effectively suppress diaphragm polarization, affecting sound performance.
Innovation Solution
A sound-producing device with a dual damper system, where the first damper group is connected to the voice coil for electrical signal input and the second damper group is connected at different heights to adjust vibration, replacing the traditional lead wire and enhancing mechanical compliance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a lead wire is used to connect the voice coil to the terminal for electrical signal input, then the voice coil can be energized, but the speaker volume cannot be reduced because the lead wire requires vibration space
Solution Approach 1:
The patent combines the electrical connection function and the vibration damping function into a single integrated component (the damper). The damper serves dual purposes: it provides the necessary electrical pathway for signal input to the voice coil and simultaneously acts as a mechanical damping element. This eliminates the need for separate lead wires that would occupy additional space, thereby enabling speaker miniaturization while maintaining electrical connectivity.
Solution Approach 2:
The damper is designed to perform multiple functions simultaneously: it serves as an electrical conductor for signal input, a mechanical damper for vibration control, and a structural support element. This multi-functionality replaces the traditional single-function lead wire, allowing the speaker to be more compact while maintaining all necessary electrical and mechanical functions.
2Device complexity
If a single damper is used, then the structure is simple, but the diaphragm polarization cannot be effectively suppressed, affecting sound performance
Solution Approach 1:
The damper system is divided into multiple independent dampers (typically three or more) arranged symmetrically around the voice coil. Each damper independently suppresses polarization in its specific direction. By segmenting the damping function across multiple components rather than relying on a single complex damper, the system effectively suppresses diaphragm polarization in all directions while maintaining relatively simple individual damper structures.
Solution Approach 2:
Multiple dampers are positioned at specific locations around the voice coil assembly, with each damper targeting polarization in its local direction. This distributed arrangement ensures that polarization is suppressed locally at each damper position, collectively achieving comprehensive polarization control across the entire diaphragm surface.
3Ease of operation
If the damper is connected to the voice coil, then electrical signal input is enabled, but the connection structure becomes complex
Solution Approach 1:
The electrical connection pathway is merged with the mechanical damper structure itself. The damper components serve as both the electrical conductors and the mechanical damping elements, eliminating the need for separate lead wires and complex connection assemblies. This integration simplifies the overall connection structure while maintaining electrical signal input capability.
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 reduces the size of the speaker, improves bass sensitivity, and minimizes diaphragm polarization, resulting in better acoustic performance with reduced total harmonic distortion and resonant frequency within the desired range.
Implementation Method 1
an elastic part connected between the first connecting part and the second connecting part
Data Source
AI summary
Disclosed are a sound-producing device and an electronic terminal. The sound-producing device comprises: a voice coil, the voice coil including a bobbin and a voice coil body wound outside the bobbin; the voice coil is configured to be able to be input an electrical signal; a first damper group and a second damper group, each of the first damper group and the second damper group comprising a first connecting part connected with the voice coil, a second connecting part fixed to the sound-producing device and an elastic part connected between the first connecting part and the second connecting part; the first damper group is configured to be in electrical communication with the voice coil to input the electrical signal to the voice coil; the first damper group and the second damper group are fixed to the voice coil in parallel at different heights.