Speaker Diaphragm Protruding Structure for Split-Vibration Control
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Solution Overview
Problem
Existing speakers face challenges in miniaturization and sound pressure output due to diaphragm split modes and irregular vibrations caused by lengthening the jib, which also increase the magnetic circuit structure's cost.
Innovation Solution
A speaker design featuring a diaphragm structure with a central part, connecting part, and hanging edge, including a protruding structure on the connecting part to enhance mechanical strength and suppress split vibrations, allowing for a higher inclination angle and larger effective vibration area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the jib of the diaphragm is lengthened to increase the outer diameter of the diaphragm, then the diaphragm can cover a larger area, but the structural height increases and miniaturization becomes difficult
Solution Approach 1:
The patent introduces a protruding structure that extends in the height direction (z-axis) from the connecting part of the diaphragm. This allows the diaphragm to achieve greater effective radius without proportionally increasing the overall structural height, as the protruding structure utilizes the height dimension strategically rather than uniformly increasing height across the entire structure.
Solution Approach 2:
The diaphragm is divided into distinct functional parts: a central vibrating part, a connecting part, and a protruding structure. This segmentation allows each part to be optimized independently - the central part for vibration, the connecting part for structural support, and the protruding structure for enhancing mechanical strength without requiring uniform height increase throughout the entire diaphragm.
2Area of moving object
If the jib is lengthened to increase diaphragm outer diameter, then larger diaphragm area is achieved, but split modes and irregular vibration behavior occur
Solution Approach 1:
The protruding structure is strategically positioned at the connecting part of the diaphragm, creating local reinforcement where mechanical strength is most needed. This localized quality enhancement prevents split modes and irregular vibrations specifically at the critical connecting region without affecting the overall vibration pattern of the diaphragm, thereby maintaining vibration stability.
3Reliability
If diaphragm structure height is increased to improve mechanical strength and reduce mode splits, then vibration stability improves, but miniaturization and thinning become difficult
Solution Approach 1:
Rather than uniformly increasing the height of the entire diaphragm structure, the patent introduces a protruding structure that extends locally in the height direction from the connecting part. This allows mechanical strength to be enhanced through increased height where specifically needed, while the rest of the diaphragm maintains a thinner profile, thus achieving both strength and miniaturization.
4Area of moving object
If the outer diameter of the voice coil is increased to match the larger diaphragm, then larger diaphragm area is achieved, but the cost of the magnetic circuit structure greatly increases
Solution Approach 1:
The patent segments the diaphragm into a central vibrating part and a non-vibrating protruding structure. Only the central part participates in vibration and sound production, while the protruding structure provides mechanical support. This allows the voice coil to be sized appropriately for the vibrating area rather than the total outer diameter, reducing magnetic circuit costs while maintaining effective diaphragm area.
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
The design suppresses split vibrations, facilitates miniaturization, and improves sound pressure level performance while maintaining mechanical strength, thereby enhancing frequency response and reducing mode splits.
Implementation Method 1
speakers can use the movement of the voice coil under the action of electromagnetism to cause the diaphragm to vibrate and then emit sound
Data Source
AI summary
A speaker includes a frame, a magnetic circuit system, and a diaphragm structure. The magnetic circuit system is arranged in the frame. A central part of the diaphragm structure is located on a voice coil of the magnetic circuit system. A connecting part of the diaphragm structure surrounds an outer edge of the central part. A first end of the connecting part faces the voice coil, and a second end of the connecting part is provided with a protruding structure. A hanging edge of the diaphragm structure includes a first bending section and a second bending section connected to each other, and the second bending section is connected to the protruding structure. In a normal direction of a bottom surface of the frame, the protruding structure is higher than a connection between the first bending section and the second bending section.