Vehicle Speaker Magnet Orientation and Flux Path Alignment
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Solution Overview
Problem
Conventional vehicle speaker devices have inefficiencies due to the mismatch between the seating direction and magnetic path forming direction of the magnet, leading to reduced efficiency and increased size.
Innovation Solution
A speaker device design where the magnet is mounted in a horizontal direction, aligning the seating direction with the magnetic path forming direction, using a plate structure with an L-shape and a non-magnetic spacer to prevent leakage magnetic flux, and integrating the plate with the frame for improved magnetic flux flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the magnet is mounted in a conventional vertical orientation, then the magnetic path can be formed, but the seating direction and magnetic path forming direction do not coincide, increasing magnet size and decreasing efficiency
Solution Approach 1:
The patent inverts the conventional vertical mounting orientation of the magnet to a horizontal orientation. This inversion allows the seating direction of the magnet to coincide with the magnetic path forming direction, thereby improving magnetic efficiency and reducing magnet size simultaneously.
Solution Approach 2:
The patent changes the mounting orientation parameter of the magnet from vertical to horizontal. This parameter change enables the seating direction and magnetic path forming direction to align, resolving the contradiction between magnetic efficiency and magnet size.
2Productivity
If the magnet is mounted horizontally to align seating direction with magnetic path forming direction, then efficiency increases and magnet size reduces, but the structural design becomes more complex
Solution Approach 1:
The patent merges the plate and frame into an integral structure through injection molding. This combining of components simplifies the overall structural design while maintaining the horizontal magnet orientation that improves efficiency and reduces magnet size.
Solution Approach 2:
The plate is designed with multi-functionality: it supports the magnet, forms part of the magnetic circuit, and integrates with the frame structure. This universal design reduces the number of separate components needed, offsetting the complexity introduced by the horizontal magnet orientation.
3Reliability
If a plate structure is used to support the magnet horizontally, then magnetic flux flow is improved, but additional components like spacers are needed to prevent leakage
Solution Approach 1:
The plate and frame are merged into an integral structure through injection molding, reducing the number of separate components. This merging maintains reliable magnetic flux flow while minimizing the increase in device complexity.
Solution Approach 2:
A non-magnetic spacer is introduced as an intermediary component between the magnet and plate to prevent magnetic flux leakage. This simple intermediary element ensures reliable magnetic flux flow without significantly increasing overall 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 alignment and structural design reduce the magnet size while enhancing efficiency and shaping the magnetic flux flow, resulting in improved sound output and reduced size.
Implementation Method 1
when a current is applied to the voice coil, the magnetized voice coil interacts with the magnetic flux generated from the magnet to move forwards and backwards thereof
Implementation Method 2
A spacer is provided at a lower portion of the magnet and the plate to prevent leakage magnetic flux
Data Source
AI summary
A speaker device for a vehicle having a structure in which a seating direction and a magnetic path forming direction of a magnet coincide with each other, may include a frame, a magnet mounted in the frame to generate a magnetic flux, a yoke having a magnetic gap to form a magnetic path generated by the magnet, a voice coil mounted in the magnetic gap to move when a current is applied, a diaphragm engaged to the voice coil and configured to vibrate according to movement of the voice coil and generate a negative pressure, and a plate configured to support the magnet, wherein the magnet is accommodated in a horizontal direction such a seating direction and a magnetic path forming direction of the magnet coincide with each other.