Camera Lens Module Rotation for Focus and Anti-Shake Without Leaf Springs
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Solution Overview
Problem
Existing camera devices face issues of control performance degradation due to leaf spring resonance and weight distribution problems in their driving mechanisms, particularly in lens movement and anti-shake correction functions.
Innovation Solution
A camera device with a driving mechanism that utilizes a first frame with an inclined supporting surface to support a lens holder, allowing the lens to move along or tilt relative to the optical axis through the rotation of the frame, eliminating the need for leaf springs and addressing resonance and weight distribution issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a leaf spring is used to elastically support and suspend the lens frame, then the lens frame can be kept in a non-contact state with other components, but resonance occurs in the vibration mode causing control performance degradation
Solution Approach 1:
The patent removes the leaf spring component from the system entirely and replaces it with a voice coil motor-driven rotating mechanism. The lens frame is directly driven by electromagnetic force without elastic suspension, eliminating the resonance source while maintaining positioning capability through direct electromagnetic actuation.
Solution Approach 2:
The mechanical leaf spring suspension system is replaced with an electromagnetic driving system consisting of a voice coil motor, magnetic yoke, and rotating mechanism. This substitution eliminates mechanical resonance while providing precise control through electromagnetic force.
2Ease of operation
If the width of the leaf spring is adjusted to control lens inclination, then the inclination can be controlled, but the weight distribution of the lens is affected making design and manufacturing more difficult
Solution Approach 1:
The mechanical leaf spring width adjustment method is replaced with an electromagnetic rotating mechanism. The voice coil motor drives the lens frame to rotate about the optical axis, controlling inclination through rotational position rather than structural geometry, which simplifies manufacturing and weight distribution.
Solution Approach 2:
The static structural control method (leaf spring width) is replaced with dynamic control through rotation. The lens inclination is controlled by the rotational position of the lens frame driven by the voice coil motor, allowing flexible adjustment without changing structural dimensions or weight distribution.
3Adaptability or versatility
If the lens is driven to move in the direction of the optical axis or in a plane perpendicular to the optical axis using a driving coil and magnet, then focusing and anti-shake functions are achieved, but the structure becomes complex and manufacturing difficult
Solution Approach 1:
The patent combines multiple functions (focusing, anti-shake, and lens rotation) into a single integrated driving mechanism. The voice coil motor and rotating mechanism simultaneously achieve all three functions by controlling the lens frame's position and orientation, eliminating the need for separate driving systems for each function.
Solution Approach 2:
The rotating mechanism driven by the voice coil motor serves multiple purposes: it controls lens inclination for anti-shake correction, adjusts focus by moving the lens along the optical axis, and enables lens rotation. This multi-functional design simplifies the overall structure and reduces manufacturing 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 solution achieves focusing and anti-shake functions without leaf spring resonance, improving control performance and reducing weight distribution, while enhancing imaging quality and adaptability to large sensors and lenses.
Implementation Method 1
the first magnetic yoke and the magnet are arranged opposite to each other in the direction of the optical axis, the magnet exerts an attractive force on the first magnetic yoke in the direction of the optical axis to press the first frame on the base
Implementation Method 2
When the driving coil is energized to generate a magnetic field, the first frame is driven by the magnet to rotate in a plane perpendicular to the direction of the optical axis
Data Source
AI summary
The present disclosure relates to the field of optics and discloses a camera device. The camera device includes a driving mechanism and a lens module. The driving mechanism includes a base with a first magnetic yoke and a driving coil, and a first frame with a magnet and an inclined supporting surface. The lens module includes a lens holder, and the first frame supports the lens holder via the inclined supporting surface. When the driving coil is energized, the first frame is driven to rotate, and the first frame drives the lens holder to move in the direction of the optical axis or tilt with respect to the optical axis via the rotating inclined supporting surface. The camera device and the electronic apparatus require no leaf spring, thereby avoiding the problem of control performance degradation and weight distribution caused by the leaf spring.