Camera Driver Using Magnetic Pivot for Large-Angle Shake Compensation
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Solution Overview
Problem
Conventional camera driving apparatuses struggle with compensating for large camera shake angles and frequencies, particularly when photographers are walking, due to structural limitations and increased frictional loads at large inclining angles, leading to difficulties in maintaining accurate control and mechanical looseness.
Innovation Solution
A camera driving apparatus with a magnetic member-based structure that includes a protrusion section with a spherical face, a movable unit with a conical contact face, and a fall preventive regulation face, allowing for inclining and rotating of the camera section around the optical axis, while maintaining constant load and preventing falls through magnetic attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the lens barrel is inclined at a large angle exceeding ±10 degrees using an elastic body support, then the inclining capability is improved, but the elastic body is deformed to plasticity level and the load becomes excessively large, causing phase and gain characteristic decline
Solution Approach 1:
The patent replaces the elastic body mechanical support system with a magnetic field-based support system. The magnetic attracting force between the attracting magnet and magnetic member provides the necessary holding force without mechanical deformation, enabling large inclining angles while maintaining control characteristics. The magnetic field force can be precisely controlled and does not suffer from plastic deformation issues that limit elastic body systems.
Solution Approach 2:
The patent changes the physical state of the support force from mechanical elastic deformation to magnetic field attraction. By adjusting magnetic field strength parameters, the system can maintain appropriate load levels even at large inclining angles, preventing the excessive load and characteristic decline that occur in elastic body systems.
2Reliability
If a reflective mirror is used in a wide-angle lens system for shake compensation, then the compensation capability is improved, but the mirror size becomes large, making the camera system non-compact
Solution Approach 1:
The patent replaces the reflective mirror optical system with a direct magnetic field-based positioning system. By using magnetic attracting force to hold and position the lens barrel directly, the system eliminates the need for large reflective mirrors in wide-angle configurations, thereby maintaining compact camera system dimensions while preserving shake compensation capability.
3Reliability
If a pivot structure using magnetic attracting force is used to support the mirror, then the support capability is improved, but the mirror may fall due to external disturbance such as vibration or impact
Solution Approach 1:
The patent incorporates a fall preventive regulation face that acts as a mechanical stop before the movable unit can fall completely. This regulation face limits the downward movement of the attracting magnet, ensuring that even under strong external disturbances like vibration or impact, the magnetic component cannot fall below a certain position, thereby maintaining support reliability.
Solution Approach 2:
The fall preventive regulation face serves as an intermediary mechanical element between the magnetic attracting force and the fixed unit. It provides a physical constraint that prevents complete failure of the magnetic support system under external disturbance, acting as a safety mechanism that complements the magnetic holding force.
4Adaptability or versatility
If a spherical lens barrel is supported at three points and inclined while moving along the optical axis, then the inclining capability is improved, but the contact frictional load changes much, making accurate control difficult
Solution Approach 1:
The patent replaces the three-point mechanical contact support system with a magnetic field-based support system. The magnetic attracting force acts uniformly on the magnetic member without the frictional variations that occur in mechanical point contacts. This eliminates the changing frictional load problem and enables accurate control of the lens barrel position and orientation.
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
Enables effective compensation for large camera shake angles and frequencies, providing stable and accurate control, reducing mechanical resonance, and enhancing impact resistance, allowing for high-speed panning, tilting, and rolling motions.
Implementation Method 1
a first movable section (102) having an attracting magnet (404) for generating a magnetic attracting force in the magnetic member
Implementation Method 2
the load on the pivot support can be constant regardless of the rotating state of the movable unit
Implementation Method 3
a fall preventive regulation face (101A), wherein even if the movable unit (101, 102) receives an impact from outside, the movable unit does not fall and returns to a state where the protrusion section (202) is in contact with the contact face (102C)
Data Source
AI summary
A camera driving apparatus capable of inclining a camera section including a lens barrel and an imaging element in a panning direction (yawing) and a tilting direction (pitching) and also capable of rotating the camera section around an optical axis thereof (rolling).