Inverted Loudspeaker Diaphragm Centering for Compact Low-Frequency Output
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Solution Overview
Problem
Conventional woofers face challenges in minimizing space while maintaining significant diaphragm excursions necessary for producing low frequencies, as their large volume occupies excessive vehicle compartment space.
Innovation Solution
The loudspeaker design features a resilient centering device positioned on the anterior side of the diaphragm, allowing for a larger surface area and increased excursion, with a magnet system and voice coil assembly that minimizes distortions and reduces overall size by inverting the traditional positioning of the diaphragm and centering device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional woofer design with a double mechanical guiding system is used, then the diaphragm can achieve significant excursions necessary for low frequencies, but the loudspeaker occupies a large volume that exceeds available vehicle compartment space
Solution Approach 1:
The patent inverts the conventional positioning by placing the resilient centering device on the anterior side of the diaphragm rather than the rear side. This inversion allows the magnetic circuit to be positioned more compactly and enables the use of a larger surface area for the centering device, which increases the possible excursion range without proportionally increasing the overall loudspeaker volume
Solution Approach 2:
The patent utilizes the anterior space more effectively by positioning the resilient centering device on the front side of the diaphragm. This dimensional reorganization allows the excursion to extend into previously underutilized spatial dimensions, enabling larger excursions without a proportional increase in the rearward projection of the loudspeaker
2Length of moving object
If the resilient centering device is positioned on the rear side of the diaphragm as in conventional designs, then the structure is simplified, but the surface area available for the centering device is limited, restricting the maximum excursion
Solution Approach 1:
By inverting the position of the resilient centering device to the anterior side of the diaphragm, the patent accesses a larger available surface area on the front of the diaphragm. This inversion allows the centering device to have a larger surface area, which directly enables greater maximum excursion of the diaphragm
3Length of moving object
If a large diaphragm surface area is used to produce significant excursions for low frequencies, then the loudspeaker volume increases, but this is necessary to achieve the required air displacement for bass production
Solution Approach 1:
The inverted positioning of the resilient centering device on the anterior side allows the diaphragm to achieve larger excursions within a more compact overall volume. The reorganized spatial arrangement enables the same or greater air displacement capability to be achieved in a smaller packaging volume
Solution Approach 2:
By utilizing the anterior space more effectively and allowing excursion in previously underutilized dimensional space, the patent achieves significant diaphragm displacement without proportionally increasing the rearward projection and overall volume of the loudspeaker enclosure
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 enables larger excursions and reduced distortions, allowing for a compact, flat woofer that can produce low frequencies with a smaller emitting surface, effectively minimizing the loudspeaker's volume while maintaining significant air displacement.
Implementation Method 1
a magnet system for controlling the movement of the diaphragm
Implementation Method 2
a resilient centering device for centering and guiding the movement of the diaphragm
Data Source
AI summary
A loudspeaker includes a movable diaphragm, a resilient centering device for centering and guiding the movement of the diaphragm, and a magnet system for controlling the movement of the diaphragm, where the diaphragm is positioned between the magnet system and the resilient centering device.