Planar Conductive Member for Miniature Speaker
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Solution Overview
Problem
In the trend of miniaturization of speaker products, the lead wire used to transmit electrical signals to the voice coil hinders volume reduction and impairs acoustic performance due to the need for vibration space, leading to poor compliance and resonance frequency issues with traditional dampers.
Innovation Solution
A sound-producing device utilizing a conductive member with a first connecting part connected to the voice coil, a second connecting part fixed to the device, and an elastic part in a planar structure, formed by integrally winding a metal wire, which replaces the lead wire to input electrical signals and adjust vibration, thereby reducing internal space and improving acoustic performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a lead wire is used to transmit electrical signals to the voice coil, then the voice coil can be energized, but the speaker volume cannot be reduced due to the vibration space requirement of the lead wire
Solution Approach 1:
The patent combines the lead wire and damper into a single integrated conductive member. The conductive member serves dual functions: transmitting electrical signals to the voice coil and acting as a damper to suppress polarization. This merging eliminates the need for separate lead wire vibration space while maintaining both electrical connection and vibration control functions
Solution Approach 2:
The conductive member is designed to perform multiple functions simultaneously: it serves as an electrical conductor for signal transmission, a mechanical damper for vibration suppression, and a structural support element. This multi-functionality allows the speaker to achieve miniaturization without compromising electrical connection or acoustic performance
2Reliability
If a traditional damper is used to suppress polarization, then the vibration direction can be adjusted, but the resonance frequency and acoustic performance are impaired
Solution Approach 1:
The conductive member is made from phosphor bronze wire, a composite material that combines electrical conductivity, mechanical strength, and damping properties. This material selection allows the single component to simultaneously achieve vibration suppression and maintain good acoustic performance with lower resonance frequency
Solution Approach 2:
The patent changes the structural parameters of the damper by forming the conductive member with specific winding patterns and geometries. The planar structure with defined thickness and configuration allows optimization of both damping characteristics and acoustic response, achieving lower resonance frequency while maintaining vibration control
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 reduces the volume of the sound-producing device while maintaining good acoustic performance by lowering the resonance frequency and total harmonic distortion, enhancing bass sensitivity and user experience.
Implementation Method 1
the conductive member including 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 conductive member is configured to input an electrical signal to the voice coil
Implementation Method 2
an elastic part connected between the first connecting part and the second connecting part; the elastic part is in a planar structure
Implementation Method 3
functions to suppress the polarization of the vibration diaphragm through the mechanical restoring force
Implementation Method 4
A speaker is a basic sound-producing unit that converts electrical signals into acoustic signals
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 body is configured to be able to be input an electrical signal; a conductive member, the conductive member including 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 elastic part is in a planar structure, and is at least located in the same plane as the first connecting part; the conductive member is configured to input an electrical signal to the voice coil.