Sound Device Magnet System Miniaturization
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Solution Overview
Problem
Conventional sound devices in portable mobile terminals face challenges in achieving high acoustic performance while being miniaturized due to the excessive space occupied by magnet systems, which hinder their ability to be compact and lightweight.
Innovation Solution
The sound device incorporates a magnet system with a central yoke, side yokes, and connection portions that form multiple magnetic gaps, allowing for a more compact design by optimizing the placement and extension of yokes to enhance magnetic performance and reduce volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a conventional magnet system with main yoke, main magnet, and side magnet is used to drive two vibration systems, then the magnetic driving capability is sufficient, but the inner space occupied is excessive thus increasing device volume
Solution Approach 1:
The side magnet is divided into two separate side magnets (first side magnet and second side magnet) positioned on opposite sides of the main magnet. This segmentation allows for a more compact arrangement where the magnetic fields from both side magnets work together with the main magnet to drive the two vibration systems, reducing the overall volume while maintaining sufficient magnetic driving capability.
Solution Approach 2:
The patent transitions from a single-side magnet configuration to a dual-side magnet configuration, utilizing both horizontal and vertical spatial dimensions more efficiently. The first and second side magnets are positioned at different locations (first side position and second side position) to create a more compact three-dimensional magnetic field distribution, thereby reducing the device volume while preserving magnetic performance.
2Power
If the magnet system occupies excessive inner space, then the magnetic driving performance is maintained, but the miniaturization ability of the sound device is negatively affected
Solution Approach 1:
By segmenting the side magnet into two separate side magnets, the magnetic field is distributed more efficiently in the limited space available. Each side magnet can be optimized for its specific position, allowing the overall system to achieve the required magnetic driving performance in a more compact configuration that enhances miniaturization ability.
Solution Approach 2:
The patent optimizes parameters such as the positions (first side position and second side position), sizes, and orientations of the segmented side magnets to achieve the desired magnetic field distribution in a reduced volume. This parameter optimization allows the system to maintain magnetic driving performance while improving adaptability for miniaturized applications.
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 achieves higher magnetic ability and miniaturization, effectively addressing the need for improved acoustic performance in a smaller form factor, aligning with the trend of thinner and lighter portable devices.
Implementation Method 1
a magnet system received in the receiving space, including: a first central yoke; a central magnet mounted on the first central yoke located in a central position; a side yoke surrounding the central magnet to form a magnetic gap
Implementation Method 2
a magnet system configured to drive the two vibration systems to vibrate to generate sound
Implementation Method 3
a first coil inserted in the magnetic gap and configured to drive the first diaphragm; a second coil inserted in the magnetic gap and configured to drive the second diaphragm
Implementation Method 4
a first vibration system arranged on one side of the magnet system, including: a first diaphragm fixed to the frame; a second vibration system arranged on the other side of the magnet system, including: a second diaphragm fixed to the frame
Data Source
AI summary
The present disclosure discloses a sound device includes a frame, a magnet system, and a first vibration system and a second vibration system arranged on two sides of a magnet system. The magnet system includes a first central yoke, a central magnet mounted on the first central yoke, a side yoke surrounding the central magnet and fixed to the frame, and a connection portion connecting the first central yoke and the side yoke. The side yoke includes a first side yoke fixed to the frame and a second side yoke bending and extending from an edge of the first side yoke towards the central magnet; the connection portion connects the first central yoke and the second side yoke. The sound device in the present disclosure has higher magnetic ability and miniaturization ability.