Image Shake Correction Lens Unit Radial Downsizing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image shake correction units face challenges in downsizing while preventing rotation of the image shake correction lens around the optical axis, as the electromagnetic actuator and annular rolling prevention member interfere when attempting to reduce the unit's radial size.
Innovation Solution
The proposed image shake correction unit includes a base member, a yoke, a lens holding member, a driving unit, a rotation suppression unit, and a biasing member, where the driving unit and rotation suppression unit are positioned on a circle with a predetermined radius centered on the optical axis, and the biasing member is configured to bias the lens holding member towards the base member, allowing for movement orthogonal to the optical axis while preventing rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the electromagnetic actuator is disposed outside the annular rolling prevention member to prevent lens rotation, then the lens rotation is suppressed, but the radial size of the image shake correction unit increases
Solution Approach 1:
The patent transitions from a two-dimensional radial arrangement to a three-dimensional configuration by positioning the electromagnetic actuator and rolling prevention member at different locations in the radial direction, allowing both components to coexist without radial overlap while maintaining rotation suppression functionality
Solution Approach 2:
The patent implements a nested arrangement where the electromagnetic actuator is positioned inside the annular rolling prevention member, with the actuator's radial extent being smaller than the inner diameter of the rolling prevention member, allowing compact integration of both components
2Area of stationary object
If the electromagnetic actuator is brought closer to the optical axis to downsize the unit radially, then the radial size is reduced, but the electromagnetic actuator and annular rolling prevention member interfere with each other
Solution Approach 1:
The patent applies local quality by giving the electromagnetic actuator an annular shape with specific radial and axial dimensions that are optimized to fit within the space defined by the rolling prevention member, ensuring no interference while maintaining compact size
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 downsized image shake correction unit that effectively prevents lens rotation around the optical axis, allowing for accurate movement and correction of image blur caused by camera shake, while maintaining stability and reducing the overall size of the unit.
Implementation Method 1
The electromagnetic actuator uses a magnet and a coil
Implementation Method 2
a biasing member configured to bias the lens holding member toward the base member in a direction of the optical axis
Data Source
AI summary
An image shake correction unit includes a base member, a yoke, a lens holding member, a driving unit, a rotation suppression unit configured to restrict rotation of the lens holding member around an optical axis of the lens unit, and a biasing member configured to bias the lens holding member toward the base member in a direction of the optical axis. The driving unit and the rotation suppression unit are disposed to satisfy a predetermined condition in a case where the image shake correction unit is viewed from the direction of the optical axis. Further, the biasing member has one end provided on the rotation suppression unit and the other end provided on the base member.