Image Blur Correction Device Using Magnetic Guide Contact
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Solution Overview
Problem
Existing image blur correction devices in imaging apparatuses face issues with loose-fitting in guide mechanisms, leading to deteriorated image quality due to inclination and aberration, and interference with magnetic field distributions, which affects driving force and stability.
Innovation Solution
An image blur correction device with a movable frame equipped with a lens or imaging element, featuring a guide part and a drive mechanism that uses urging magnets to ensure contact between the guide part and the guide supporting part, eliminating loose-fitting and maintaining magnetic field integrity by employing a voice coil motor with soft magnetic yokes and permanent magnets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic body is disposed in a magnetic field of the drive mechanism to remove loose-fitting, then loose-fitting is removed, but there is an influence on magnetic field distribution to coils for driving, causing lowering of driving force and increase in variation of driving force
Solution Approach 1:
The magnetic body for removing loose-fitting is extracted from the drive mechanism's magnetic field area. Specifically, the guide shaft is made non-magnetic in the region where the drive mechanism's magnetic field acts, separating the magnetic body from the coil magnetic field to eliminate interference while maintaining the loose-fitting removal function through alternative positioning.
Solution Approach 2:
The guide shaft exhibits different magnetic properties in different regions: it is magnetic in regions where loose-fitting removal is needed (away from coils) and non-magnetic in regions where drive mechanism magnetic fields act (near coils). This local differentiation allows simultaneous achievement of loose-fitting removal and drive force stability.
2Reliability
If the magnetic body is disposed to remove loose-fitting, then loose-fitting is removed, but force urging a supporting part that movably supports a movable frame is likely to get off balance, preventing sure removal of loose-fitting
Solution Approach 1:
The magnetic body is positioned asymmetrically relative to the movable frame, specifically on the side opposite to the drive mechanism. This asymmetric positioning creates a balanced urging force that counteracts the asymmetric load from the drive mechanism, preventing the supporting part from getting off balance while ensuring reliable loose-fitting removal.
3Ease of operation
If loose-fitting occurs in guide mechanisms, then movement is possible, but image quality deteriorates due to inclination and aberration
Solution Approach 1:
The magnetic body applies preliminary attractive force to the guide shaft before movement occurs, pre-compressing the guide mechanism to eliminate loose-fitting and prevent inclination during operation. This preliminary action ensures that the movable frame moves smoothly without causing image quality deterioration.
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 effectively removes loose-fitting, prevents image deterioration, and maintains stable driving force, ensuring proper image blur correction without interfering with the magnetic field, resulting in improved image quality and apparatus performance.
Implementation Method 1
The fixed frame has magnetic bodies, and the movable frame has urging magnets at positions corresponding to the magnetic bodies. Specifically, the urging magnets use attractive force between the magnets and the magnetic bodies, so as to urge the movable frame in a direction in which the guide part and the guide supporting part come into contact with each other.
Implementation Method 2
The Y movable frame is set to be a structure (drive mechanism) which is operated by magnetic force formed by permanent magnets and coils facing the magnets on the guide stage.
Data Source
AI summary
An image blur correction device includes: a movable frame which is equipped with a lens or an imaging element and has a guide part; a fixed frame having a guide supporting part which movably supports the movable frame by coming into contact with the guide part; and a drive mechanism which drives the movable frame for correcting image blur by moving the movable frame relative to the fixed frame. The fixed frame has magnetic bodies, and the movable frame has urging magnets at positions corresponding to the magnetic bodies. Specifically, the urging magnets use attractive force between the magnets and the magnetic bodies, so as to urge the movable frame in a direction in which the guide part and the guide supporting part come into contact with each other.