Image Blur Correction Coil Magnet Stacking
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Solution Overview
Problem
Existing image blur correcting devices face challenges in design freedom and miniaturization due to the increased weight of movable members, which requires thicker driving coils and magnets, leading to protrusions that can interfere with guide shafts and reduce design flexibility.
Innovation Solution
The image blur correcting device employs a configuration where the driving coils and magnets are positioned to protrude from the movable members in a way that maximizes propulsive force while minimizing interference, allowing for reduced thickness and weight, and improved center of gravity alignment to prevent resonance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the size of the imaging element or the imaging optical system is increased, then the imaging performance is improved, but the weight of the movable member is increased
Solution Approach 1:
The patent positions driving coils and magnets on opposite sides of the movable member in the optical axis direction, utilizing the third dimension (depth) to distribute driving components. This dimensional arrangement allows the propulsive force generation elements to be separated spatially, reducing their horizontal footprint and preventing interference with guide shafts while maintaining the required propulsive force for the heavier movable member.
2Force
If the thickness of the driving coil and the driving magnet is increased to secure propulsive force, then the propulsive force is improved, but the device complexity is increased due to protrusions interfering with guide shafts
Solution Approach 1:
The patent resolves the interference issue by arranging driving coils and magnets on opposite sides of the movable member along the optical axis. This vertical stacking in the third dimension eliminates horizontal interference with guide shafts while preserving the necessary thickness and propulsive force of each driving component, thereby maintaining design freedom.
Solution Approach 2:
The patent employs asymmetric positioning of driving components relative to the movable member, with driving coils and magnets placed on opposite sides rather than symmetrically adjacent to a single guide shaft. This asymmetric arrangement naturally avoids interference with the guide shaft structure while distributing mechanical stress and magnetic fields more effectively.
3Force
If the distance between the driving coil and the driving magnet is reduced to increase propulsive force, then the propulsive force is improved, but interference with guide shafts occurs
Solution Approach 1:
The patent eliminates interference by transitioning the arrangement from a horizontal layout (adjacent to guide shafts) to a vertical layout (opposite sides of the movable member along the optical axis). This dimensional change allows the driving coil and magnet to be positioned close to each other for maximum propulsive force while the guide shaft passes through the movable member without obstruction.
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 enhances design freedom, enables miniaturization, and reduces weight, allowing for effective image blur correction without interference issues.
Implementation Method 1
a driving coil or a driving magnet that is fixed to at least one of the two movable members and generates a propulsive force for moving the two movable members
Data Source
AI summary
Provided are an image blur correcting device that capable of improving a degree of freedom in design and realizing miniaturization or weight reduction, a lens device including the image blur correcting device, and an imaging device including the lens device. An image blur correcting device includes a fixing member, a first movable member that is supported by the fixing member in a state of being movable in a direction X, and a second movable member that is supported by the first movable member in a state of being movable in a direction Y A second coil that drives the second movable member is fixed to one first surface of the second movable member in a direction Z, and a first coil that drives the first movable member is fixed to the other second surface of the second movable member in the direction Z.