Speaker Diaphragm Height Adjuster for Compact Audio Performance
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Solution Overview
Problem
The miniaturization and thinning of electronic devices, such as smartphones, often compromise sound quality and volume due to the constraints imposed by the size of the display and the need for acoustic components like speakers.
Innovation Solution
The design incorporates a speaker configuration with a diaphragm, yolk, coil, and magnets, where the coil is positioned to linearly reciprocate within an avoidance groove and height adjuster, optimizing the magnetic flux density and force factor to enhance sound quality and volume while maintaining a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the electronic device is miniaturized and thinned to improve portability, then the thickness and weight are reduced, but the sound quality and sound volume deteriorate due to insufficient resonant space for acoustic components
Solution Approach 1:
The patent introduces a height adjuster that protrudes from the diaphragm in the thickness direction, positioning the coil at a specific height above the diaphragm surface. This vertical dimension adjustment allows the coil to be optimally positioned within the limited space to maximize magnetic flux density and BL factor, achieving good sound quality in a thinned device structure
Solution Approach 2:
The patent optimizes the BL factor (magnetic flux density × coil length) by adjusting the coil position relative to the magnet and yolk structure. By changing the spatial parameters of the acoustic component arrangement, particularly the vertical position of the coil via the height adjuster, the magnetic field interaction is enhanced to maintain sound quality despite reduced device thickness
2Power
If the coil is positioned closer to the magnet to maximize magnetic flux density, then the BL factor increases, but the available space for diaphragm movement and resonance is reduced
Solution Approach 1:
The height adjuster utilizes the vertical dimension (thickness direction) to position the coil at an optimal height above the diaphragm. This allows the coil to be close enough to the magnet for strong magnetic flux density while maintaining sufficient vertical space for diaphragm vibration and resonance, resolving the spatial conflict between magnetic field strength and acoustic resonance volume
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 maximizes the BL factor and force factor, allowing for improved sound quality and increased sound volume in a smaller or thinner device, enabling effective miniaturization without sacrificing audio performance.
Implementation Method 1
a coil mounted to one surface of the diaphragm and disposed between the diaphragm and the yolk... configured to linearly reciprocate the diaphragm by receiving an electric signal
Implementation Method 2
The coil may be disposed to make a surface thereof facing the yolk correspond to the avoidance groove and configured to linearly reciprocate the diaphragm by receiving an electric signal
Data Source
AI summary
A speaker and/or an electronic device are provided. The electronic device includes the same may include a diaphragm, a yolk disposed to face the diaphragm and including an avoidance groove formed on a surface thereof facing the diaphragm, a coil mounted to one surface of the diaphragm and disposed between the diaphragm and the yolk, and a first magnet mounted to the yolk and disposed to be surrounded by at least part of the coil or a second magnet disposed to surround at least part of the coil. The coil may be disposed to make a surface thereof facing the yolk correspond to the avoidance groove and configured to linearly reciprocate the diaphragm by receiving an electric signal.