Sound Producing Device Segmented Frames
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Solution Overview
Problem
Conventional sound producing devices face challenges in accurately positioning and stabilizing the armature, magnets, and coil due to the need for a large holding frame that compromises magnetic field integrity and assembly precision, leading to unstable fixation and complex adjustment processes.
Innovation Solution
The design introduces a sound producing device with a driving-side frame for stable armature and yoke fixation and a vibration-side frame for diaphragm support, allowing for a larger diaphragm area and separate material selection for magnetic and non-magnetic components, enabling precise positioning and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single holding frame is used to support both the diaphragm and the armature/yoke, then the device structure is simplified, but the positioning accuracy and stability of the armature and yoke deteriorate
Solution Approach 1:
The holding frame is divided into two separate frames: a first holding frame for supporting the diaphragm and a second holding frame for supporting the armature and yoke. This segmentation allows each frame to be optimized for its specific function, with the second frame providing a stable reference for precise positioning of magnetic components without the interference of the diaphragm support structure.
2Area of moving object
If a large opening is provided in the holding frame for diaphragm support, then the diaphragm area is increased, but the fixation stability of the armature and yoke deteriorates
Solution Approach 1:
By separating the holding functions into two frames, the patent allows the first holding frame to have a large opening for maximum diaphragm area while the second holding frame maintains a solid structure with sufficient surface area for stable fixation of the armature and yoke. Each frame's structure is optimized independently for its specific purpose.
3Ease of manufacture
If the same material is used for both holding frames, then the manufacturing process is simplified, but the magnetic field integrity deteriorates
Solution Approach 1:
The patent applies different material properties to different parts of the system: the second holding frame is made of magnetic material to maintain magnetic field integrity for the armature and yoke, while the first holding frame can be made of non-magnetic material suitable for diaphragm support. This local differentiation of material properties optimizes both magnetic performance and structural functionality.
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 configuration allows for stable and accurate positioning of the armature, magnets, and coil, simplifying assembly and enhancing sound output by increasing the diaphragm area and magnetic flux density, while maintaining magnetic field integrity.
Implementation Method 1
the armature is magnetized by a voice current supplied to the coil, and the vibrating section vibrates because of the magnetization and the magnetic fields of the magnets
Implementation Method 2
the vibrating section vibrates because of the magnetization and the magnetic fields of the magnets
Implementation Method 3
These vibrations are transmitted to the diaphragm through the beam section, so that the diaphragm vibrates to produce a sound
Data Source
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AI summary
[Object] To provide a sound producing device in which it is possible to ensure a sufficiently large space for installing a diaphragm and to stably fix a magnetic field generating unit and an armature to a large attachment surface. [Means for Solution] A driving-side frame 5 and a vibration-side frame 6 are placed and joined one over the other, and an outer peripheral portion of the driving-side frame 5 is held between a lower case 3 and an upper case 4. An opening 6c of a large area is formed in the vibration-side frame 6, and a flexible sheet 12 to which a diaphragm 11 is adhered is joined to the opening 6c. The lower surface of the driving-side frame 5 is an attachment surface 5a of a large area, and a magnetic field generating unit 20 and a supporting member 31 that supports an armature 32 are stably fixed to this attachment surface 5a.