Flat Voice Coil Vibration Speaker for Thin Design
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Solution Overview
Problem
Existing vibration sound-producing apparatuses in portable electronic terminals are limited by their thickness and cannot meet the requirements of thin-type and miniaturization due to the cylindrical voice coil and magnetic circuit system's vertical vibration constraints.
Innovation Solution
A vibration sound-producing apparatus with a flat voice coil and a magnetic circuit system comprising symmetrically arranged magnets, a transmission structure, and an elastic means, allowing for horizontal vibration and improved magnetic field strength, which reduces thickness occupancy and enhances sound production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cylindrical voice coil with vertical vibration is used, then the vibration sound-producing functionality is achieved, but the thickness in the vertical direction increases due to the mass block requirement
Solution Approach 1:
The patent changes the vibration direction from vertical to horizontal by using a flat voice coil structure. The voice coil is arranged horizontally with its plane perpendicular to the vibrating diaphragm, allowing horizontal vibration that eliminates the need for vertical mass blocks and reduces overall thickness.
Solution Approach 2:
Instead of using a cylindrical voice coil that vibrates vertically, the patent inverts the approach by using a flat voice coil that vibrates horizontally. This inversion of the conventional structure resolves the thickness issue while maintaining vibration functionality.
2Ease of operation
If a cylindrical voice coil structure is used, then the vibration function is achieved, but the volume for voice coil vibration is limited
Solution Approach 1:
The patent transitions from a cylindrical voice coil vibrating vertically to a flat voice coil vibrating horizontally. This dimensional change allows for larger vibration amplitude and volume in the horizontal direction, effectively increasing the voice coil vibration space without compromising the vibration function.
3Length of stationary object
If the vibration speaker is designed for thin-type, then the thickness is reduced, but the existing structure cannot meet the miniaturization requirement
Solution Approach 1:
By reorienting the voice coil to a horizontal flat structure, the patent enables thinner overall device thickness while providing sufficient vibration space. This dimensional reconfiguration allows the device to meet both thin-type design requirements and miniaturization capabilities simultaneously.
Solution Approach 2:
The patent divides the magnetic circuit system into separate first and second magnet portions positioned at opposite sides of the voice coil. This segmentation allows for a more compact and balanced structure that reduces thickness while maintaining the necessary magnetic field strength for vibration functionality.
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 apparatus achieves improved thin-type design and performance by allowing a larger vibration space for the voice coil and increased magnetic field strength, resulting in enhanced sound production and reduced thickness, meeting the demands of miniaturization and thin-type design.
Implementation Method 1
the cylindrical voice coil drives the vibrating diaphragm to vibrate in the vertical direction to produce sound under lorentz force
Implementation Method 2
the magnetic circuit system is subjected to reaction force and resonates in the vertical direction
Implementation Method 3
the magnetic conductive part is suspended inside the housing through the elastic means; the magnetic conductive part is vibratable in an elastic direction of the elastic piece
Data Source
AI summary
Disclosed is a vibration sound-producing apparatus. A sound output aperture is provided on a sidewall perpendicular to a thickness direction. A diaphragm is parallel to the plane on which the sound output aperture is located. A flat sound coil is perpendicular to the diaphragm. Two magnets parallel to the sound coil are arranged at either side of the sound coil. The vibrating direction of the sound coil avoids the thickness direction. The vibrating direction of an integral structure of the magnets and a magnetic conductor part also avoids the thickness direction. This facilitates a thickness-reduced design for a product, increases the space for vibration, and enhances product performance, meanwhile, the design of the two magnets effectively increases the strength of the magnetic field within the product, this further improving product performance. The vibration sound-producing apparatus of the present invention has the advantages of a great thickness-reduced design and great performance.