Magnetic Vibrating Plate Sounding Device for Distortion Reduction
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Solution Overview
Problem
In conventional moving coil sounding devices, the voice coil is prone to damage from long-term vibration, affecting sound quality and stability due to electrical connections and uneven diaphragm vibrations, leading to instability and distortion.
Innovation Solution
A sounding device design featuring a vibrating system with a magnetic vibrating plate and transmission piece, where two driving units with coils connected in parallel drive the diaphragm, enhancing driving force, vibration amplitude, and balance by using a magnetic vibrating plate and transmission piece to generate sound, while maintaining electrical connections through a circuit board.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a voice coil is used to drive the diaphragm to vibrate, then the diaphragm can generate sound, but the voice coil is prone to damage from long-term vibration affecting reliability
Solution Approach 1:
The patent extracts the voice coil from the system and replaces it with a magnetic vibrating plate driven by electromagnetic coils. The magnetic vibrating plate is suspended in the accommodating space and driven by magnetic force from the coils, eliminating the mechanical wear and damage issues of the traditional voice coil while maintaining the vibration generation function.
2Reliability
If the voice coil is electrically connected with external components, then electrical signal transmission is achieved, but the vibration affects the stability of the electrical connection
Solution Approach 1:
The patent removes the voice coil that caused vibration-related connection instability and replaces it with a magnetic vibrating plate system. The electromagnetic coils are fixed to the shell and do not vibrate with the diaphragm, while the magnetic vibrating plate is driven by magnetic field rather than direct mechanical coupling, thus stabilizing electrical connections.
3Force
If a single driving unit is used, then the structure is simple, but the vibration amplitude and driving force are insufficient
Solution Approach 1:
The patent combines multiple electromagnetic coils (first electromagnetic coil and second electromagnetic coil) to drive the magnetic vibrating plate simultaneously. This merging of multiple driving units increases the driving force and vibration amplitude while maintaining a relatively compact structure within the accommodating space.
4Manufacturing precision
If the voice coil drives the diaphragm directly, then the structure is simple, but uneven amplitudes in different regions affect tone quality
Solution Approach 1:
The patent introduces a transmission piece that connects the magnetic vibrating plate to the diaphragm. This transmission piece segments and distributes the vibration force more evenly across the diaphragm surface, ensuring uniform amplitude distribution and improving tone quality while adding necessary structural elements.
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 increases driving force, vibration amplitude, and sensitivity, improves balance, and reduces distortion, providing a more stable and effective sound output.
Implementation Method 1
Coils of at least two driving units 5 are connected in parallel. At least two magnetic vibrating plates 32 correspondingly push different parts of the vibrating diaphragm 31 to vibrate
Implementation Method 2
The magnetic vibrating plate 32 and the vibrating diaphragm 31 are arranged separately. The body portion 323 is suspended in the accommodating space 2, and the magnetic vibrating plate 32 pushes the vibrating diaphragm 31 to vibrate and generate sound
Data Source
AI summary
A sounding device includes a shell, a vibrating system and a driving unit. The vibrating system includes a vibrating diaphragm, a magnetic vibrating plate, and a transmission piece. The magnetic vibrating plate includes a fixing portion fixed on the shell and a body portion bent and extended from the fixing portion and arranged oppositely to the vibrating diaphragm. The driving unit includes a coil and a magnet portion fixed relatively to the shell. The coil winds on the body portion, and an orthographic projection of the magnet portion falls onto the body portion and is close to the transmission piece, the magnet portion and the body portion are arranged separately. At least two magnetic vibrating plates respectively drive different positions of the vibrating diaphragm, and the magnetic vibrating plates correspond to the driving units one by one.