Bone Conduction Speaker Magnetic Circuit for Higher Sensitivity
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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 in converting electrical energy into mechanical energy.
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, enhancing sensitivity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the mechanical power is increased to drive soft tissues and bones to vibrate, then the sensitivity and efficiency of converting electrical energy into mechanical energy is improved, but the volume and weight of the speaker increases
Solution Approach 1:
The patent changes the magnetic field distribution parameters by introducing a second magnetic element that surrounds the first magnetic element. This creates a non-uniform magnetic field where the magnetic field strength of the first magnetic field within the magnetic gap exceeds the magnetic field strength of the second magnetic field, optimizing the magnetic circuit for higher mechanical power output with reduced weight
Solution Approach 2:
The magnetic circuit assembly is segmented into multiple magnetic elements (first magnetic element and second magnetic element) with distinct functions. The first magnetic element generates the primary magnetic field while the second magnetic element provides magnetic guidance and support, allowing the system to achieve high mechanical power without proportionally increasing overall weight
2Power
If the magnetic field strength is increased to improve sensitivity, then the efficiency of converting electrical energy into mechanical energy is improved, but the volume of the speaker increases
Solution Approach 1:
The patent optimizes the magnetic field parameters by creating a specific field distribution where the first magnetic field strength exceeds the second magnetic field strength within the magnetic gap. This parameter optimization allows high sensitivity without proportionally increasing the overall speaker volume
Solution Approach 2:
The second magnetic element is configured to surround the first magnetic element, creating a nested structure. This nesting allows the magnetic circuit to achieve high magnetic field strength and sensitivity while minimizing the overall volume occupied by the magnetic components
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 increases the magnetic induction intensity within the magnetic gap, improving the sensitivity and efficiency of the bone conduction speaker, while also reducing its volume and weight, leading to a longer service life.
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.