Bone Conduction Speaker Magnetic Circuit for High-Flux Gaps
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Solution Overview
Problem
Bone conduction speakers face challenges in achieving high sensitivity and efficiency due to the higher mechanical power requirements, which existing magnetic circuit assemblies are unable to effectively address, leading to suboptimal performance and reduced service life.
Innovation Solution
A magnetic circuit assembly is designed with multiple magnetic elements and guide elements that surround a central magnetic element, creating a magnetic gap where the magnetic field strength is enhanced, reducing volume and weight while increasing sensitivity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the magnetic field strength is increased to improve sensitivity and efficiency, then the mechanical power output improves, but the volume and weight of the magnetic circuit assembly increase
Solution Approach 1:
The patent applies nesting by placing the first magnetic element inside the second magnetic element, with the first magnetic guide element positioned within the magnetic gap formed by the second magnetic element. This nested configuration allows multiple magnetic fields to interact within a compact structure, enhancing the magnetic field strength in the magnetic gap without proportionally increasing the overall volume and weight of the assembly.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by configuring the first magnetic element and first magnetic guide element within the magnetic gap of the second magnetic element. This dimensional optimization allows the magnetic fields to interact in multiple spatial dimensions, concentrating magnetic flux density in the magnetic gap while maintaining a compact overall structure that minimizes volume and weight increase.
2Power
If the magnetic field strength is increased to improve sensitivity, then the efficiency of converting electrical energy to mechanical energy improves, but the device complexity increases
Solution Approach 1:
The patent applies multi-functionality by designing the first magnetic element to serve dual purposes: it generates its own magnetic field and simultaneously acts as part of the magnetic circuit for the second magnetic element. The first magnetic guide element similarly serves multiple functions by guiding magnetic flux from both magnetic elements and concentrating it in the magnetic gap. This reduces the need for additional separate components, thereby limiting the increase in device complexity.
3Power
If multiple magnetic elements are used to enhance magnetic field strength, then the sensitivity and efficiency improve, but the manufacturing complexity increases
Solution Approach 1:
The patent applies merging by integrating the first magnetic element and first magnetic guide element within the magnetic gap structure of the second magnetic element. This combined configuration allows the magnetic circuit assembly to be manufactured as a more unified structure, where components can be pre-positioned and secured together, simplifying the assembly process and reducing manufacturing complexity despite the presence of multiple magnetic elements.
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 enhanced magnetic field strength within the magnetic gap improves the sensitivity and efficiency of the bone conduction speaker, leading to a longer service life and enabling integration with wearable smart devices, enhancing user experience.
Implementation Method 1
The magnetic circuit assembly may generate a first magnetic field. The magnetic circuit assembly may include a first magnetic element generating a second magnetic field
Implementation Method 2
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.