Speaker Voice Coil Lead Wire Fixation on Membrane
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Solution Overview
Problem
Conventional speakers in mobile devices face issues with miniaturization due to flexure vibrations of the lead wire, which can cause collisions and reliability problems, affecting sound quality and durability.
Innovation Solution
A speaker design where the line lead portion of the voice coil is fixed onto a solder pad on the membrane, eliminating flexure vibrations and optimizing internal space, using a silicone diaphragm with conductive and non-conductive portions for improved structural integrity and electrical connectivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the lead wire is used to receive electric signal and fixed to a holder, then the voice coil can be connected to external circuit, but the lead wire suffers flexure vibration which occupies extra space and causes collisions
Solution Approach 1:
The patent merges the lead wire with the membrane by fixing the lead wire directly onto the membrane surface. This integration eliminates the need for separate lead wire routing and holder structures, thereby reducing the overall speaker volume while maintaining electrical connectivity functionality.
Solution Approach 2:
The patent transitions the lead wire from a three-dimensional flexible cable to a two-dimensional planar structure by fixing it onto the membrane surface. This dimensional change allows the lead wire to follow the membrane's vibration pattern without occupying additional spatial volume, thus resolving the contradiction between connectivity and miniaturization.
2Ease of manufacture
If the lead wire is fixed to a holder, then the voice coil can be assembled, but the lead wire collides with the holder or membrane during flexure vibration deteriorating sound quality
Solution Approach 1:
By merging the lead wire fixation with the membrane structure, the patent eliminates the holder component that caused collisions. The lead wire is now fixed directly to the membrane, ensuring it moves synchronously with the membrane vibration and avoiding collision-induced sound quality deterioration.
Solution Approach 2:
The membrane serves as an intermediary between the lead wire and the external environment. By fixing the lead wire to the membrane, the membrane acts as a mediator that guides the lead wire's movement, preventing direct collision with other components and maintaining sound quality.
3Ease of manufacture
If the lead wire is fixed to a holder, then the voice coil can be assembled, but the lead wire may be over-stretched and broken off when flexure vibration is too fierce
Solution Approach 1:
The patent merges the lead wire with the membrane structure, eliminating the rigid holder connection that caused over-stretching. The lead wire now flexes naturally with the membrane's vibration, preventing excessive tension and potential breakage, thereby improving durability while maintaining assembly simplicity.
Solution Approach 2:
The patent applies dynamics by allowing the lead wire to move flexibly with the membrane's vibration pattern rather than being rigidly fixed to a holder. This dynamic configuration enables the lead wire to accommodate fierce vibrations without over-stretching, thus improving strength and reliability.
4Reliability
If extra space is allocated for lead wire flexure vibration, then the lead wire can move freely, but the speaker miniaturization is compromised
Solution Approach 1:
The patent resolves this contradiction by transitioning the lead wire from a three-dimensional free-moving cable to a two-dimensional planar structure fixed on the membrane surface. This allows the lead wire to move freely within the membrane's vibration plane without requiring additional spatial volume, thus maintaining reliability while enabling miniaturization.
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 enhances miniaturization, sound quality, and reliability by preventing lead wire collisions and breakages, while maintaining efficient sound production.
Implementation Method 1
the voice coil is used to drive the membrane to perform vibration and produce sounds
Implementation Method 2
electro-acoustic transducer technologies... converting electrical signals into audible sounds
Data Source
AI summary
A speaker is provided in the present disclosure. The speaker includes a membrane, a voice coil connected to the membrane, and a solder pad formed on the membrane. The membrane includes a conductive silicone portion and a non-conductive silicone portion. The voice coil includes a coil portion for driving the membrane to vibrate, and a line lead portion led out from an end of the coil portion. The line led portion is connected to the solder pad, and the solder pad is formed on the conductive silicone portion of the membrane. The conductive silicone portion is connected to an input terminal of the speaker to receive an electric signal for driving the voice coil.