Arc-Shaped Anti-Shake Coil for Compact Lens Driving Device
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Solution Overview
Problem
Existing lens driving devices face issues with size and assembly due to deformation of anti-shake coils, which occupy installation space and result in poor overall assembly.
Innovation Solution
A lens driving device design featuring an arc-shaped anti-shake coil structure that matches the outer peripheral shape of the middle hole, allowing the coil to be completely located outside the hole, combined with an elastic assembly and flexible printed circuit for efficient space utilization and miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the anti-shake coil is positioned close to the central hole of the base, then the overall device size can be reduced, but the coil deforms and exceeds the central hole due to assembly tolerance, occupying installation space and resulting in poor assembly
Solution Approach 1:
The anti-shake coil is designed with a curved arc-shaped structure that matches the outer peripheral shape of the middle hole. This curvature allows the coil to follow the contour of the hole, ensuring it remains positioned outside the hole without deformation, thus resolving the conflict between compact size and positioning accuracy.
2Area of stationary object
If the anti-shake coil is positioned close to the central hole, then installation space is saved, but the coil exceeds the hole due to assembly tolerance, resulting in poor overall assembly
Solution Approach 1:
The arc-shaped structure of the anti-shake coil is designed to match the outer peripheral shape of the middle hole, allowing the coil to be positioned as close as possible to the hole without exceeding it. This curved design accommodates assembly tolerances while maintaining proper positioning, thus saving installation space without compromising assembly quality.
3Force
If the anti-shake coil maintains driving force, then OIS performance is ensured, but the coil structure becomes complex to avoid deformation
Solution Approach 1:
The anti-shake coil adopts a simple arc-shaped structure that naturally follows the contour of the middle hole. This curved geometry provides both the necessary mechanical strength to prevent deformation and the appropriate magnetic field distribution to maintain driving force, achieving both goals without excessive 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
The design ensures the anti-shake coil does not exceed the middle hole while maintaining driving force, allowing for a compact lens driving device that saves installation space and enhances user experience.
Implementation Method 1
When current is applied to the anti-shake coil, the anti-shake coil and the anti-shake magnet generate electromagnetic field
Implementation Method 2
the anti-shake coil drives, under the action of the Lorentz force of the electromagnetic field, the anti-shake magnet to move in a direction perpendicular to an optical axis
Data Source
AI summary
A lens driving device is provided and includes: a base, where the base defines a middle hole at a center of the base and penetrating through the base; a supporting frame defining an accommodation space; a lens barrel holder accommodated in the accommodation space and spaced apart from the supporting frame for installing a lens module; an elastic assembly fixed on two opposing sides of the supporting frame in an optical axis direction; at least one anti-shake coil fixed on the base; and at least one magnet fixed on the supporting frame, where each respective magnet is spaced apart from and opposite to a respective anti-shake coil of the at least one anti-shake coil. Compared with the related technologies, the lens driving device of the present disclosure has good anti-shake effect, saves installation space and has good experience effect.