Bone Conduction Speaker Magnetic Circuit for Stronger Gap Flux
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Solution Overview
Problem
Bone conduction speakers require higher mechanical power due to the need to drive soft tissues and bones to vibrate, making sensitivity a critical factor for efficiency and performance, especially for speakers with higher power requirements.
Innovation Solution
A magnetic circuit assembly for bone conduction speakers is designed, comprising a first magnetic element, a first magnetic guide element, and at least one second magnetic element that surrounds the first magnetic element, creating a magnetic gap where the magnetic field strength of the first magnetic field exceeds that of the second magnetic field, thereby enhancing sensitivity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the magnetic circuit assembly uses a single magnetic element, then the structure is simple, but the magnetic field strength within the magnetic gap is insufficient
Solution Approach 1:
The magnetic circuit assembly is divided into multiple magnetic elements (first magnetic element and at least one second magnetic element) that work together to generate the magnetic field. This segmentation allows each element to contribute to the overall magnetic field strength while maintaining a manageable structure.
Solution Approach 2:
The second magnetic element is configured to surround the first magnetic element, creating a nested arrangement. This nesting optimizes the magnetic field distribution within the magnetic gap and enhances the overall magnetic field strength without significantly increasing the external dimensions of the assembly.
2Reliability
If the magnetic circuit assembly increases magnetic field strength, then sensitivity improves, but the volume and weight increase
Solution Approach 1:
The magnetic elements are strategically positioned to concentrate magnetic field strength specifically within the magnetic gap where it is most needed for driving the voice coil. The second magnetic element surrounding the first allows for localized enhancement of the magnetic field in the gap region without uniformly increasing the magnetic field throughout the entire assembly volume.
Solution Approach 2:
The second magnetic element is configured to surround the first magnetic element in a radial or circumferential arrangement, utilizing the third dimension (radial direction) to enhance the magnetic field. This dimensional arrangement allows the magnetic field strength in the gap to be increased without simply scaling up the size of the magnetic elements in the axial direction.
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 magnetic circuit assembly improves the sensitivity and efficiency of bone conduction speakers by increasing the magnetic field strength within the magnetic gap, reducing the volume and weight of the magnetic circuit, and extending the service life of the speaker.
Implementation Method 1
The bone conduction speaker can convert electrical signals into mechanical vibration signals
Implementation Method 2
The magnetic circuit assembly may generate a first magnetic field... A magnetic field strength of the first magnetic field within the magnetic gap may exceed a magnetic field strength of the second magnetic field within the magnetic gap
Data Source
AI summary
The present disclosure relates to a magnetic circuit assembly of a bone conduction speaker. The magnetic circuit assembly may generate a first magnetic field. The magnetic circuit assembly may include a first magnetic element, and the first magnetic element may generate a second magnetic field. The magnetic circuit may further include a first magnetic guide element and at least one second magnetic element. The at least one second magnetic element may be configured to surround the first magnetic element and a magnetic gap may be configured between the second magnetic element and the first magnetic element. A magnetic field strength of the first magnetic field within the magnetic gap may exceed a magnetic field strength of the second magnetic field within the magnetic gap.