Loudspeaker Coupling Voice Coil High-Frequency Vibration Control
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Solution Overview
Problem
Conventional micro sound generating devices face limitations in miniaturization and high-frequency performance due to the restricted adjustment space in their vibration systems, which affects the acoustic quality and stereo sound production, especially in compact audio equipment like mobile phones.
Innovation Solution
The loudspeaker design incorporates a centering support piece connected to both the diaphragm and voice coil, featuring a coupling voice coil and magnetic circuit system with a magneto-conduct yoke, central, and side magnetic circuit parts, allowing magnetic coupling that adjusts the high-frequency vibration state of the diaphragm, thereby enhancing sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a high modulus vibrating plate is attached on the central part of the diaphragm to improve high-frequency performance, then the high-frequency performance is improved, but the adjustment space is limited which limits the acoustic performance
Solution Approach 1:
The invention divides the voice coil system into two independent parts: a vibrating voice coil attached to the diaphragm for primary sound generation, and a coupling voice coil attached to the centering support piece for high-frequency adjustment. This segmentation allows independent optimization of each coil's parameters, greatly expanding the adjustment space for acoustic performance while maintaining high-frequency performance through the coupling voice coil and coupling magnetic circuit part.
2Volume of moving object
If the vibration system comprises only a diaphragm and voice coil for miniaturization, then the device size is reduced, but the acoustic performance and stereo sound production are limited
Solution Approach 1:
The invention merges two voice coil systems (vibrating voice coil and coupling voice coil) and two magnetic circuit systems (main magnetic circuit and coupling magnetic circuit) into a single integrated structure. The coupling magnetic circuit part is positioned above the central magnetic circuit part, and both coils work simultaneously within the same device space. This merging allows enhanced acoustic performance through magnetic coupling while maintaining miniaturization, as the combined system achieves better sound quality without proportionally increasing device volume.
3Device complexity
If the diaphragm structure is simplified for compact design, then the device complexity is reduced, but the high-frequency vibration control is insufficient causing split vibrations
Solution Approach 1:
The invention introduces a coupling magnetic circuit part as an intermediary element positioned above the central magnetic circuit part. This coupling magnetic circuit part interacts with the coupling voice coil to provide additional magnetic force that stabilizes the diaphragm's high-frequency vibration. The intermediary coupling mechanism suppresses unwanted split vibrations by providing controlled magnetic interaction, thereby improving vibration stability without significantly increasing overall structural complexity.
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 improves high-frequency performance by magnetically coupling the coupling voice coil with the magnetic circuit, suppressing split vibrations and optimizing the vibration state of the diaphragm, resulting in better sound quality and efficiency in compact audio devices.
Implementation Method 1
when the coupling voice coil is energized, upward and downward forces are generated by magnetic field coupling of the coupling voice coil and the coupling magnetic circuit part
Implementation Method 2
magnetic field coupling of the coupling voice coil and the coupling magnetic circuit part, so that when the vibrating voice coil drives the diaphragm to vibrate and make a sound, the coupling voice coil and the coupling magnetic circuit part are magnetically coupled to push and pull and expand the diaphragm
Data Source
AI summary
A loudspeaker and an earphone are disclosed. The loudspeaker comprises: a housing; and a vibration system and a magnetic circuit system that are accommodated in the housing. The vibration system comprises a diaphragm, a centering support piece and a vibrating voice coil. The centering support piece comprises a mounting part correspondingly connected with the central part of the diaphragm. The magnetic circuit system comprises a magneto-conduct yoke, a central magnetic circuit part and a side magnetic circuit part, and a coupling magnetic circuit part located above the central magnetic circuit part, and a magnetic gap accommodating the vibrating voice coil is formed between the central magnetic circuit part and the side magnetic circuit part. When the coupling voice coil is energized, upward and downward forces are generated by magnetic field coupling of the coupling voice coil and the coupling magnetic circuit part. The loudspeaker has good sound effect.