Movable Magnet Loudspeaker Inversion for Sound Production
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Solution Overview
Problem
Conventional loudspeaker technologies do not effectively utilize reversed operation mechanisms to induce changes in magnetic fields for mechanical displacement, limiting innovation in sound production and device integration.
Innovation Solution
An apparatus comprising a surface mechanically displaced by a first magnet, supported by a second magnet and an elastic element, with a coil receiving an electrical signal to alter the magnetic field and break force equilibrium, causing the surface to vibrate and produce sound.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional loudspeaker technology is used, then sound production is achieved, but the utilization of reversed operation mechanisms is insufficient, limiting innovation
Solution Approach 1:
The patent applies reversed operation by making the magnet movable instead of stationary. In conventional loudspeakers, the magnet is fixed and the coil moves; this patent inverts the arrangement by making the magnet movable through elastic supporting members, enabling new operational modes and innovation in sound production mechanisms
2Productivity
If the surface is mechanically displaced to produce sound, then sound production efficiency is improved, but the force equilibrium state must be maintained
Solution Approach 1:
The patent employs dynamic balancing through elastic supporting members that allow the magnet to move while maintaining force equilibrium. The elastic elements provide flexibility to accommodate displacement while restoring equilibrium, enabling efficient sound production without compromising system stability
3Ease of manufacture
If permanent magnets are used for displacement, then the displacement mechanism is simplified, but control precision is reduced
Solution Approach 1:
The patent incorporates feedback control by detecting the position of the movable magnet and adjusting the electrical signal to the coil accordingly. This closed-loop control system maintains control precision while using simple permanent magnets for displacement, resolving the contradiction between simplicity and precision
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 solution enables efficient sound production by proportionally relating electrical signals to mechanical displacement, allowing for innovative integration in various devices and structures, such as wall speakers or electronic device covers.
Implementation Method 1
a magnetic field between the first magnet and the second magnet causes a force to the surface
Implementation Method 2
a magnetic field between the first magnet and the second magnet causes a force to the surface
Implementation Method 3
an entity, comprising the surface and the at least one supporting member, comprises at least one elastic element providing a supporting counterforce acting as a counterforce to the force caused by the magnetic field
Implementation Method 4
a coil coupled with the second magnet; and a signal port electrically coupled with the coil, wherein an electrical signal is configured to travel between the signal port and the coil
Data Source
AI summary
An apparatus includes a surface arranged to be mechanically displaced, a first magnet coupled with the surface, at least one supporting member for supporting the surface, a base comprising a second magnet, wherein the second magnet is arranged, at least partially, to face the first magnet, a coil coupled with the second magnet, and a signal port electrically coupled with the coil. An electrical signal is configured to travel between the signal port and the coil, and the electrical signal in the coil is proportional to mechanic displacement of the surface when a force equilibrium state of the surface is broken either by the electrical signal in the coil or the mechanic displacement of the surface from a position of the force equilibrium state.