Speaker Device with Segmented Magnetic Circuit for Sound Absorption
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Solution Overview
Problem
Existing speaker devices have insufficient space for sound absorbing materials due to their irregular outer shape, leading to poor acoustic performance.
Innovation Solution
The speaker device incorporates a magnetic circuit unit with a magnetic conductive plate featuring through holes and grooves that allow for increased volume of sound absorbing material, enhancing the acoustic effect by expanding the space for filling such materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the speaker device uses an irregular outer shape, then the housing structure is simplified, but the space for filling sound absorbing material becomes insufficient
Solution Approach 1:
The housing is divided into multiple chambers including a front chamber, a rear chamber, and side chambers. This segmentation creates dedicated spaces for sound absorbing material while maintaining an irregular overall shape. The magnetic circuit unit is segmented into a first magnetic circuit unit and a second magnetic circuit unit, allowing independent optimization of each section's space utilization.
Solution Approach 2:
The magnetic circuit unit is nested within the housing structure, with the first magnetic circuit unit positioned in the front chamber and the second magnetic circuit unit in the rear chamber. This nesting arrangement maximizes the utilization of available space within the irregular housing shape, ensuring adequate space for sound absorbing material in the remaining regions.
2Reliability
If the space for sound absorbing material is increased, then the acoustic performance is improved, but the device complexity increases
Solution Approach 1:
Sound absorbing material is selectively placed in specific regions where it is most effective, such as the side chambers and remaining spaces within the magnetic circuit units. The housing structure includes locally optimized features like grooves and recesses in the screen cloth that accommodate sound absorbing material without requiring complex overall structural changes.
Solution Approach 2:
The housing utilizes three-dimensional space efficiently by creating side chambers and utilizing vertical and horizontal dimensions within the irregular shape. The magnetic circuit units are arranged in a layered configuration, and the screen cloth includes grooves that extend in multiple directions, maximizing the volume for sound absorbing material without proportionally increasing structural complexity.
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 improves the acoustic performance of the speaker device by increasing the volume for sound absorbing materials, resulting in better sound emission and playback quality.
Implementation Method 1
a voice coil inserted in the magnetic gap
Implementation Method 2
a magnetic circuit unit having a magnetic gap
Implementation Method 3
The space for filling a sound absorbing material in the speaker device is insufficient
Data Source
AI summary
A speaker device includes a frame, a vibration unit fixedly connected to the frame, a magnetic circuit unit having a magnetic gap, and a screen cloth. The vibration unit includes a diaphragm and a voice coil. The magnetic circuit unit includes a carrier, a first main magnet, an auxiliary magnet and a magnetic conductive plate. The magnetic conductive plate is fixed to the frame. The magnetic conductive plate includes a first central portion and a first edge portion; the auxiliary magnet is located at the first central portion. The first edge portion is provided with a through hole. The screen cloth is provided at a side of the carrier away from the diaphragm, and includes a second central portion and a second edge portion. The second edge portion is provided with a first groove recessed toward the magnetic conductive plate, corresponding to the through hole.