Segmented Magnet Voice Coil Motor for Long Zoom Stroke
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Solution Overview
Problem
Current voice coil motors with longer magnets incur high processing costs and a higher risk of breakage due to their length.
Innovation Solution
The use of multiple magnets arranged in sections along the length of an annular magnetic yoke reduces processing costs and breakage risk, while maintaining a larger driving stroke by replacing traditional long magnets with multiple shorter ones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If longer magnets are used to achieve larger stroke, then the driving stroke is improved, but processing costs increase and breakage risk increases
Solution Approach 1:
The patent divides the magnetic yoke into multiple sections along the moving direction, with each section containing shorter magnets. This segmentation allows the system to achieve the required driving stroke through multi-stage movement while using shorter, easier-to-process magnet segments, thereby reducing processing costs and breakage risk while maintaining the overall stroke requirement
2Length of moving object
If longer magnets are used to achieve larger stroke, then the driving stroke is improved, but the risk of breakage during processing increases
Solution Approach 1:
By segmenting the magnetic yoke into multiple shorter sections, each containing shorter magnets, the patent reduces the length of individual magnet components. This segmentation lowers the risk of breakage during processing and assembly while the cumulative effect of multiple sections maintains the required driving stroke, thus improving reliability without sacrificing performance
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 lowers processing costs and reduces the likelihood of breakage while maintaining a larger driving stroke and enabling efficient zooming in photography devices with improved compactness and reduced power consumption.
Implementation Method 1
The mover structure includes a mover coil movably sleeved on a yoke section of the annular magnetic yoke
Data Source
AI summary
Disclosed are a voice coil motor, a zoom lens and a photography device. The voice coil motor includes a machine shell, an annular magnetic yoke, a plurality of magnets and a mover structure. The annular magnetic yoke is provided on the machine shell. The plurality of magnets are provided in the annular magnetic yoke and are provided at interval along a length direction of the annular magnetic yoke. The mover structure includes a mover coil movably sleeved on a yoke section of the annular magnetic yoke.