Multi-Magnet Speaker With Suspended Spider Stabilizer
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Solution Overview
Problem
Modern mini speakers face efficiency and sound quality issues due to the lack of membrane stabilization, leading to reduced excursion range and sensitivity, which is often addressed by using larger amplifiers that increase power consumption.
Innovation Solution
A multi-magnet speaker design that includes an inner and outer magnet structure with a spider suspended between them, allowing for membrane stabilization and enhanced air flow, thereby increasing excursion range and sound pressure without the need for heavier plastic rings or larger amplifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a spider is used to stabilize the membrane in traditional large speakers, then membrane stability and sound quality are improved, but device size and complexity increase
Solution Approach 1:
The spider is suspended between the inner and outer magnets, nesting the stabilization function within the existing multi-magnet structure without adding external support components. This allows membrane stabilization in a compact configuration where the spider is integrated into the magnetic assembly rather than requiring separate mounting structures.
2Volume of moving object
If the speaker size is reduced for mini speakers, then device portability is improved, but membrane stabilization becomes impossible due to space constraints
Solution Approach 1:
The multi-magnet structure creates additional spatial dimensions and gaps within the compact speaker volume. The inner and outer magnets are positioned to create a gap where the spider can be suspended, effectively utilizing the third dimension (depth between magnet faces) to accommodate stabilization components without increasing the speaker's external footprint.
3Speed
If thinner membranes are used in mini speakers to respond to smaller flux ranges, then sensitivity to small signals is improved, but membrane stability and excursion range are reduced
Solution Approach 1:
The spider provides localized stabilization at the membrane center where it is attached, allowing the thin membrane to maintain stability in the critical suspension region while remaining flexible and responsive in its vibrating surface area. This local support enables thin membranes to achieve both rapid response and adequate stability by providing support only where structurally necessary.
4Power
If larger amplifiers are used to compensate for reduced sensitivity, then sound pressure and volume are improved, but power consumption increases
Solution Approach 1:
The multi-magnet structure with suspended spider creates a self-stabilizing system that improves membrane excursion range and movement evenness inherently, through the magnetic forces and mechanical suspension rather than requiring external power amplification. The structure itself provides the stabilization function that would otherwise require active electronic compensation, reducing the need for high-power amplifiers.
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 design enhances speaker efficiency, allowing mini speakers to be driven with smaller amplifiers while maintaining volume and sound quality, reducing power consumption and improving sound pressure.
Implementation Method 1
pulses of electricity are typically passed through a voice coil positioned in proximity of a permanent magnet. As the magnetic field generated by the voice coil rapidly changes along with received current pulses of varying magnitude, the voice coil is attracted to and repelled from the permanent magnet.
Implementation Method 2
A spider is attached to the membrane and suspended at least partially by the inner magnet. The spider stabilizes the membrane throughout a range of motion occurring responsive to forces generated by the voice coil and the multi-magnet structure.
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A speaker includes a multi-magnet structure including at least an inner magnet and an outer magnet. A voice coil is suspended from a membrane into a gap between the inner magnet and the outer magnet, and a spider is attached to the membrane and suspended at least partially by the inner magnet. The spider is configured to stabilize the membrane throughout a range of movement responsive to a force generated by the voice coil and the multi-magnet structure.