Speaker Magnetic Circuit Side Washer Welding
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Solution Overview
Problem
The existing magnetic circuit systems in speakers suffer from unreliable connection strength due to glue bonding, leading to potential loosening and falling off of components under environmental stress.
Innovation Solution
The magnetic circuit system incorporates a side washer with a bending part that is welded to the magnetic conduction plate, enhancing mechanical connection strength and using hot-melting riveting to secure the side washer to the speaker shell, thereby improving the overall connection reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glue bonding is used to connect magnetic circuit system components, then the manufacturing process is simple and no cutting-edge equipment is needed, but the connection strength is insufficient and components may loosen or fall off under environmental stress
Solution Approach 1:
The patent replaces the chemical bonding mechanism (glue) with a mechanical bonding mechanism (welding of bending parts). The bending parts extend from the side washer and are welded to the magnetic conduction plate, creating a mechanical connection that provides superior connection strength while maintaining manufacturing feasibility through standard welding processes
Solution Approach 2:
The side washer is segmented into a washer body and separate bending parts. This segmentation allows the bending parts to be specifically designed for welding attachment to the magnetic conduction plate, while the washer body maintains its fastening function. The segmentation enables differentiated functional optimization of each component part
2Strength
If welding is used to fix the bending part to the magnetic conduction plate, then the connection strength is significantly improved, but the manufacturing process complexity increases
Solution Approach 1:
The bending part is merged with the side washer to form an integrated component structure. This merging eliminates the need for separate fastening components and reduces the number of assembly steps. The combined structure can be welded as a single unit to the magnetic conduction plate, simplifying the manufacturing process while maintaining strong connections
3Reliability
If the bending part is designed to extend into a recess of the magnetic conduction plate, then the connection reliability is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The recess is pre-formed in the magnetic conduction plate before final assembly. This preliminary action allows for precise positioning and alignment of the bending part before welding. The pre-formed recess serves as a guide that ensures proper placement, reducing the actual welding precision requirements while maintaining high connection reliability
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 solution significantly enhances the connection strength between components, preventing loosening and falling off, and allows for a more compact design without compromising acoustic performance, while reducing the reliance on glue bonding.
Implementation Method 1
the bending part is fixed to the magnetic conduction plate by welding
Implementation Method 2
a middle shell of the speaker is provided with hot-melting columns corresponding to the prefabricated openings one by one; each hot-melting column penetrates through the corresponding prefabricated opening; and the side washer is fixed to the middle shell in a riveting manner through the hot-melting of the hot-melting columns
Data Source
AI summary
Disclosed are a magnetic circuit system for a loudspeaker, and a loudspeaker. The magnetic circuit system for a loudspeaker comprises a magnetically conductive plate (11), a central magnet (12), a central washer (14), a side magnet (13), and a side washer (15). The side washer (15) comprises a washer body (151) and a bent portion (152) continuing from the washer body (151). The washer body (151) is arranged on the surface, away from the magnetically conductive plate (11), of the corresponding side magnet (13). The bent portion (152) is bent towards the magnetically conductive plate (11) from top to bottom via a side face (15a) of the washer body (151). The bent portion (152) and the magnetically conductive plate (11) are fixedly welded together. According to the present invention, by providing the bent portion and fixedly welding the bent portion and the magnetically conductive plate together, the side washer, the magnetically conductive plate, and the side magnet between the side washer and the magnetically conductive plate are effectively prevented from loosening and falling off due to insufficient glue bonding strength, thus achieving the object of improving the connection strength of the magnetic circuit system itself.