Electroacoustic Transducer Edge Magnet Positioning
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Solution Overview
Problem
The existing dual magnetic circuit structure in electroacoustic transducers often results in insufficient bonding between the central magnet, edge magnets, and yoke, causing the edge magnets to attract and attach to the central magnet, leading to defects in the products.
Innovation Solution
The electroacoustic transducer incorporates strip-shaped edge magnets with limiting parts at their corners and stoppers on the yoke to prevent the edge magnets from moving towards the central magnet, ensuring stable positioning and preventing attraction between the magnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the central magnet and edge magnets are fixedly combined with the yoke only by bonding, then the structure is simple and easy to manufacture, but the bonding firmness is insufficient causing the edge magnets to attach to the central magnet
Solution Approach 1:
The edge magnets are segmented by providing limiting parts (protrusions) at their corners, which divide the edge magnet into distinct regions. This segmentation allows the limiting parts to engage with corresponding recesses in the yoke, creating multiple discrete bonding zones that collectively enhance overall bonding firmness while maintaining manufacturing simplicity.
Solution Approach 2:
The limiting parts on the edge magnets act as intermediaries between the edge magnets and the yoke. These protrusions engage with recesses in the yoke to provide mechanical interlocking, supplementing the bonding force and preventing the edge magnets from attaching to the central magnet under magnetic attraction.
2Power
If the edge magnets are positioned close to the central magnet to form a closed magnetic field, then the magnetic field efficiency is improved, but the magnetic attraction causes the edge magnets to move towards and attach to the central magnet
Solution Approach 1:
The limiting parts on the edge magnets provide preliminary anti-action by creating mechanical constraints that counteract the magnetic attraction force before the edge magnets can move towards and attach to the central magnet. The protrusions engage with recesses in the yoke to pre-establish positional stability, preventing the harmful movement caused by magnetic attraction.
Solution Approach 2:
The magnetic attraction between edge magnets and central magnet, which was originally a harmful force causing instability, is converted into a beneficial pre-compression force. The limiting parts allow the edge magnets to be held firmly in position against the yoke, where the magnetic attraction enhances the contact pressure and bonding firmness without causing unwanted movement or attachment.
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 enhances the stability and yield of the products by preventing the edge magnets from being attracted to the central magnet, thereby reducing defects and improving the overall magnetic circuit system's performance.
Implementation Method 1
the magnetic circuit system forms a closed magnetic field, so that the voice coil is subjected to force in the magnetic gap formed by the magnetic circuit system and vibrates up and down
Implementation Method 2
the central magnet and the edge magnets attract each other, and the central magnet and the edge magnets are fixed only by being fixedly combined with the yoke
Data Source
AI summary
Disclosed is an electroacoustic transducer, comprising a vibration system and a magnetic circuit system, wherein the vibration system comprises a vibrating diaphragm and a voice coil; and the magnetic circuit system comprises a yoke, a central magnet, and edge magnets; wherein, each edge magnet has a strip shape, limiting parts are provided at two corners of any edge magnet closer to a magnetic gap, and the yoke is provided with stoppers abutted against the limiting parts at positions corresponding to the limiting parts. Each edge magnet of the present invention is provided with limiting parts formed by removing material, and the yoke is provided thereon with stoppers for preventing the edge magnets from approaching the central magnet, so that a bad phenomenon due to the fact that the edge magnets and the central magnet are attracted to each other can be avoided, thereby increasing the yield of a product.