Vibration Motor Closed Magnetic Loop Design
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Solution Overview
Problem
One-side magnet configuration in existing vibration motors results in a divergent magnetic field, leading to insufficient driving force for effective vibration feedback in mobile devices.
Innovation Solution
A vibration motor design featuring two magnet sets disposed on opposite sides of the coil, forming a closed magnetic loop to enhance the magnetic field intensity, with each magnet set comprising two magnets arranged perpendicular to the coil and having opposite magnetization directions, ensuring a robust magnetic field for sufficient vibration force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a one-side magnet configuration is used, then the device complexity is reduced, but the magnetic field intensity becomes too weak to generate sufficient driving force
Solution Approach 1:
The magnet configuration is segmented into two separate magnet sets positioned on opposite sides of the coil. Each magnet set contains multiple magnets arranged in specific patterns, dividing the magnetic field generation function into distinct segments that work together to create a concentrated closed-loop magnetic field, thereby increasing magnetic field intensity and driving force.
Solution Approach 2:
The patent transitions from a one-side magnet arrangement to a two-sided configuration, adding spatial dimensionality to the magnetic field generation. By positioning magnet sets on both sides of the coil with specific orientations, the system creates a three-dimensional closed-loop magnetic field structure that concentrates magnetic flux and enhances field intensity.
2Ease of manufacture
If a one-side magnet configuration is used, then the manufacturing process is simplified, but the magnetic field becomes divergent and insufficient for effective vibration feedback
Solution Approach 1:
The magnet arrangement is segmented into two independent magnet sets on opposite sides of the coil, each containing multiple magnets with specific polarities. This segmentation allows for standardized manufacturing of each magnet set while achieving a reliable closed-loop magnetic field configuration that ensures effective vibration feedback performance.
Solution Approach 2:
The patent applies local quality by positioning magnets with specific polarity orientations at specific locations on both sides of the coil. Each magnet set is configured with alternating N and S poles facing the coil, creating localized high-intensity magnetic field regions that form a closed loop, thereby ensuring reliable vibration feedback in critical areas.
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 closed magnetic loop configuration significantly increases the magnetic field intensity, enabling the vibration motor to provide effective vibration feedback for mobile devices by ensuring a strong driving force.
Implementation Method 1
a coil is disposed between the two magnet sets; when the vibration motor operates, the two magnet sets and the coil form a closed magnetic loop
Implementation Method 2
two magnet sets are disposed on opposite sides of the coil respectively, and the two magnet sets and the coil form a closed magnetic loop
Data Source
AI summary
A vibration motor is provided in the present disclosure. The vibration motor includes a stationary part, a vibration part and an elastic connector. The stationary part includes a housing providing an accommodating space. The vibration part is suspended within the accommodating space by the elastic connector. The stationary part includes a coil, and the vibration part includes a first magnet set and a second magnet set. The first magnet set and the second magnet set are respectively disposed at two opposite sides of the coil for generating a closed magnetic loop. The first magnet set comprises a first left magnet and a first right magnet spaced apart from each other, and the second magnet set comprises a second left magnet and a second right magnet spaced apart from each other.