Magnetic Constraint for Camera Hand-Shake Correction Module
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Solution Overview
Problem
Conventional hand-shake correction systems in digital cameras face challenges with obstructed driving means operation due to varying elastic forces from springs, making linear control difficult and increasing system height, which limits internal space.
Innovation Solution
A hand-shake correction module using magnetic or magnetizable members to provide a consistent pressing force, allowing the image pickup device to move with two degrees of freedom while maintaining a compact design and reducing the load on driving means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring is used to prevent separation of sliding members from the base plate, then the sliding members are constrained in the Z-axis direction, but the elastic force varies with moving distance causing non-linear control and obstructing the driving means operation
Solution Approach 1:
The patent replaces the spring-based mechanical constraint system with a magnetic constraint system. Magnetic members are positioned on the base plate and sliding members to provide consistent pressing force in the Z-axis direction without the elastic force variation problems of springs. This substitution eliminates the varying load on driving means and allows for more precise linear control while maintaining reliable constraint.
Solution Approach 2:
The patent changes the physical parameter of the constraint mechanism from elastic (spring) to magnetic field-based. By using magnetic attraction force instead of elastic force, the pressing force remains relatively constant regardless of the sliding member's position, enabling linear control and preventing obstruction of driving means operation.
2Reliability
If the spring length is increased to reduce elastic force variation, then the pressing force becomes more consistent, but the system height increases and internal space is limited
Solution Approach 1:
The patent replaces the spring mechanism with a magnetic constraint system that provides consistent pressing force without requiring increased component length. The magnetic members can be positioned close to each other while maintaining stable attraction force, thus achieving force consistency without increasing the overall system height or reducing internal space.
Solution Approach 2:
The patent transitions from a mechanical spring system that requires axial length to provide consistent force to a magnetic field system where the force can be maintained through optimized magnetic member positioning. This dimensional change allows for compact design while maintaining pressing force consistency.
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 precise motion control of the image pickup device, improving operational reliability and conserving space within the camera for other elements by minimizing the impact of magnetic attraction forces on the driving mechanism.
Implementation Method 1
a pressing means which prevents the first sliding member and the second sliding member from being separated from the base plate
Data Source
AI summary
Provided is a hand-shake correction module for a digital camera, which has a small volume and small operational load when moved. The hand-shake correction module includes a base plate; a first sliding member which moves in a first axis direction with respect to the base plate; a second sliding member including an image pickup device, the second sliding member being movable with respect to the first sliding member in a second axis direction perpendicular to the first axis; and a pressing means which generates a magnetic force preventing the first sliding member and the second sliding member from being separated from the base plate.