Electrodynamic Transducer Suspension Side Wall Attachment
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Solution Overview
Problem
Existing electrodynamic acoustic transducers with slim coil cross sections experience connection breakage between the suspension system and coil due to small contact area, leading to reduced lifetime and unsuitability for high sound power applications, especially in mobile devices.
Innovation Solution
The suspension system is fixed to the coil's side wall, increasing the contact area and durability, and is optionally also attached to the top wall or shoulder, allowing for a larger contact area and improved attachment, even in coils with slim cross sections, thereby enhancing the transducer's lifespan and preventing peeling during rocking or tumbling movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the suspension system is fixed to the lower end of the voice coil, then the connection is simple to implement, but the contact area is small leading to connection breakage and reduced lifetime
Solution Approach 1:
The suspension system is moved from the lower end (bottom surface) of the coil to the side wall (lateral surface) of the coil. This dimensional change in attachment location allows the suspension system to wrap around or attach to the side surface, significantly increasing the contact area between the suspension system and coil, thereby improving connection durability while maintaining manufacturing simplicity
2Ease of manufacture
If the suspension system is fixed to the lower end of the voice coil, then the attachment process is simple, but the electrodynamic acoustic transducer becomes too tall for mobile devices
Solution Approach 1:
The attachment location is changed from the vertical bottom surface to the lateral side wall of the coil. This repositioning allows the suspension system to extend horizontally rather than vertically, reducing the overall height of the transducer while keeping the attachment process simple and effective
3Power
If a slim cross section coil is used for high sound power applications, then the transducer can achieve high excursion and sound output, but the contact area between suspension system and coil becomes too small preventing reliable connection
Solution Approach 1:
For slim cross-section coils designed for high power output, the suspension system is repositioned from the lower end to the side wall, where it can utilize the extended lateral surface area. This dimensional repositioning provides sufficient contact area even on slim coils, enabling both high sound output and reliable connection durability
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 significantly increases the connection durability between the suspension system and coil, ensuring longer transducer lifespan and preventing peeling, while maintaining a flat profile suitable for mobile devices, even under high excursion and sound output conditions.
Implementation Method 1
a magnet system being designed to generate a magnetic field transverse to a longitudinal extension of the coil wire and transverse to the loop axis
Data Source
AI summary
An electrodynamic acoustic transducer is disclosed, which comprises at least one coil with a coil wire being wound around a loop axis and a magnet system being designed to generate a magnetic field transverse to a longitudinal extension of the coil wire and transverse to the loop axis. Furthermore, the electrodynamic acoustic transducer comprises a membrane, which is fixed to the at least one coil and to the magnet system or to a frame/housing of the electrodynamic acoustic transducer. In addition, the electrodynamic acoustic transducer comprises a suspension system, which is fixed to the at least one coil and to the magnet system or to said frame/housing. In detail, the suspension system is fixed to the at least one coil in a region of a side wall of the at least one coil, which is oriented parallel to the loop axis.