Image Blur Correction Device Guide Shaft Elimination
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Solution Overview
Problem
Existing image blur correction devices face challenges in reducing size while maintaining image blur correction performance, particularly in compact camera designs with folding optical systems, where conventional devices increase in size due to the need for guide shafts and drive units, leading to potential decreases in positional accuracy and manufacturing complexity.
Innovation Solution
The image blur correction device features a lens support mechanism with a first and second support member, driven by linear and rotational drive units that directly impart force to the correction lens, eliminating the need for a guide shaft and allowing for a more compact design by rotating around a rotational axis parallel to the optical axis, with integrated position detection elements for enhanced accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional image blur correction devices are used in compact cameras with folding optical systems, then the camera can achieve image blur correction functionality, but the device size increases due to the need for guide shafts and drive units
Solution Approach 1:
The patent removes the guide shaft component from the image blur correction device, extracting only the essential drive units that directly impart force to the correction lens. This elimination of unnecessary components reduces device size while maintaining the core image blur correction functionality through direct rotational and linear drive mechanisms.
Solution Approach 2:
The patent replaces the conventional mechanical guide shaft system with a direct drive system where rotational and linear drive units directly impart force to the correction lens. This mechanical substitution eliminates the need for intermediate guide components, reducing overall device volume while preserving correction performance.
2Ease of operation
If guide shafts are used to support the correction lens, then the lens can be moved in pitching and yawing directions, but the device complexity increases and manufacturing becomes more difficult
Solution Approach 1:
The patent extracts and removes the guide shaft from the system, retaining only the essential drive units. This simplification reduces structural complexity and manufacturing difficulty while maintaining the ability to move the correction lens in the required pitching and yawing directions through direct rotational and linear actuation.
Solution Approach 2:
Instead of using a guide shaft to constrain and guide lens movement, the patent inverts the approach by using drive units that directly impart rotational and linear force to move the lens. This inversion of the conventional guidance mechanism simplifies the overall structure and reduces manufacturing complexity.
3Ease of manufacture
If adhesive bonding is used to assemble the device, then components can be joined, but manufacturing costs increase and assembly processes become more complex
Solution Approach 1:
The patent removes the adhesive bonding process from the assembly method by designing a structure where components can be directly connected through mechanical means. This elimination of adhesive bonding simplifies the assembly process, reduces manufacturing costs, and decreases assembly process complexity while maintaining component integrity.
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 enables a reduction in device size without compromising image blur correction performance, improving positional accuracy and reducing manufacturing costs by eliminating the need for adhesive bonding and simplifying assembly processes.
Implementation Method 1
a hole element 406c, 406d that detects, as a positional detection element, the position of the lens support member 405 based on magnetic flux
Implementation Method 2
an electromagnetic actuator 412, 414 that directly imparts a driving force to the lens support member 405
Data Source
AI summary
An image blur correction device 400 includes a pitching movement frame 405, a yawing movement frame 408, and a third group frame 462. The pitching movement frame 405 supports a third lens group G3 included in an optical system for performing image blur correction. The yawing movement frame 408 supports the pitching movement frame 405 to be movable in the pitching direction perpendicularly intersecting a second optical axis A2, within a plane perpendicularly intersecting the second optical axis A2. The third group frame 462 supports the yawing movement frame 408 to be movable in the yawing direction along an arc whose center is a rotational axis A3, within a plane perpendicularly intersecting the second optical axis A2.