Loudspeaker Magnetic Elements Segmented for Power Output
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Solution Overview
Problem
Conventional loudspeakers have low output power due to limited exposure of magnetic elements to magnetic forces, resulting in reduced vibration and acoustic volume, and increasing the size of magnetic elements to address this issue leads to increased weight and reduced responsiveness.
Innovation Solution
A loudspeaker design featuring multiple oppositely oriented magnetic elements spaced apart and positioned in the coil tube to maximize exposure to magnetic forces, with damping membranes to stabilize vibrations, allowing for enhanced attraction and repulsion and increased output power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the magnetic element is enlarged to match the winding width of the coil unit, then the magnetic element can take full advantage of magnetic forces from both ends of the coil unit, but the weight of the magnetic element increases significantly
Solution Approach 1:
The single large magnetic element is divided into multiple smaller magnetic elements (first magnetic element, second magnetic element, third magnetic element) arranged in sequence along the axial direction. This segmentation allows the system to utilize the magnetic forces from both ends of the coil unit without requiring a single heavy large magnet, as each smaller magnetic element can be positioned to interact with the dense magnetic lines at different locations along the coil unit.
2Power
If a single large magnetic element is used to maximize exposure to magnetic forces, then the output power increases, but the responsiveness to magnetic forces decreases due to increased weight
Solution Approach 1:
Dividing the magnetic system into multiple smaller magnetic elements reduces the mass of each individual element while maintaining the total magnetic interaction area. This enables faster acceleration and responsiveness to alternating magnetic forces from the coil unit, as lighter elements can be moved more quickly in response to the alternating current-driven magnetic field changes.
Solution Approach 2:
The magnetic elements are arranged not only along the axial direction but also positioned at different radial locations within the coil tube. This multi-dimensional arrangement allows multiple magnetic elements to simultaneously interact with magnetic forces from different regions of the coil unit, maximizing the utilization of magnetic forces without increasing the weight of any single element.
3Force
If the magnetic element is positioned to utilize magnetic forces from both ends of the coil unit, then the attraction and repulsion forces are enhanced, but the structure becomes more complex
Solution Approach 1:
The connecting piece serves multiple functions: it mechanically connects the first and second magnetic elements, provides positioning features to ensure proper alignment within the coil tube, and may serve as a magnetic circuit element. This multi-functionality reduces the need for separate components and simplifies the overall structure despite the presence of multiple magnetic elements.
Solution Approach 2:
The connecting piece integrates the support and positioning functions for multiple magnetic elements into a single component. By combining these functions, the design avoids the need for separate mounting structures for each magnetic element, thereby reducing structural complexity while still enabling the magnetic elements to be positioned to utilize forces from both ends of the coil unit.
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 design significantly increases the output power of the loudspeaker by ensuring magnetic elements are effectively exposed to dense magnetic lines, resulting in louder and clearer sound with improved vibration transmission to the diaphragm.
Implementation Method 1
When a current passes through and thus magnetizes the coil unit 121, an electromagnetic effect is produced between a central position of the resonant chamber 111 and the through hole 112, and magnetic lines generated by the coil unit 121 and magnetic lines generated by the magnetic element 13 create attractive and repulsive forces.
Implementation Method 2
magnetic lines generated by the coil unit 121 and magnetic lines generated by the magnetic element 13 create attractive and repulsive forces. As the audio signal current input to the coil unit 121 varies in magnitude and direction, the magnetic element 13 vibrates reciprocally along the axis of the coil tube 12 and thereby vibrates the air around the diaphragm 113
Data Source
AI summary
The present invention is to provide a loudspeaker, which includes a frame having a through hole centrally provided at a bottom side thereof, a coil tube with a coil unit fixedly mounted around the outer periphery thereof and having a first end fixed to the through hole and a second end received in a receiving space of the frame, a diaphragm attached to periphery of an opening of the frame, and a plurality of oppositely oriented magnetic elements fixed on the diaphragm, wherein every two adjacent magnetic elements are spaced apart by an appropriate distance, and the magnetic elements are located in the coil tube at positions that magnetic lines generated by the coil unit are highly concentrated. Since vibration of the magnetic elements caused by the magnetic forces generated from the coil unit is enhanced, output power of the loudspeaker will increase accordingly.