Image Shake Correction Device Movement Restrictor Design
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Solution Overview
Problem
Existing image shake correction devices face challenges in achieving weight reduction, size reduction, and improved responsiveness while preventing movable members from being lifted, as excessive reduction in pressing member installation area compromises stability and increases power requirements.
Innovation Solution
An image shake correction device with a movable member supported by a support member and a movement restrictor that includes a movement prevention member and an insertion member, where the movement prevention member prevents perpendicular movement while the insertion member restricts movement in multiple directions, allowing for reduced size and weight without compromising stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the installation area of the pressing member is excessively reduced to achieve weight reduction, then weight reduction is achieved, but the movable member cannot be prevented from being lifted
Solution Approach 1:
The pressing member is divided into a first pressing member and a second pressing member that are positioned at different locations. The first pressing member presses the movable member from the front surface side, while the second pressing member presses from the rear surface side. This segmentation allows for more effective prevention of lift with reduced overall pressing area, achieving both weight reduction and reliable lift prevention.
Solution Approach 2:
The solution transitions from using a single pressing member to using two pressing members positioned at different spatial dimensions (front and rear surfaces). This dimensional approach allows the pressing forces to work synergistically, providing effective lift prevention with smaller individual pressing areas, thus reducing total weight while maintaining reliability.
2Area of stationary object
If the number of pressing members is reduced to achieve size reduction, then size reduction is achieved, but it becomes difficult to prevent the movable member from being lifted
Solution Approach 1:
The pressing function is segmented into two separate pressing members positioned at different locations (front and rear surfaces). This segmentation allows each pressing member to be smaller in size while collectively providing effective lift prevention, achieving overall size reduction without compromising reliability.
Solution Approach 2:
By positioning pressing members at different spatial dimensions (front and rear surfaces), the solution achieves effective lift prevention with smaller individual component sizes. This dimensional distribution allows for compact overall device size while maintaining reliable movable member constraint.
3Reliability
If friction between engagement pin and engagement window is increased to prevent lift, then lift prevention is improved, but responsiveness is reduced and power required for driving is increased
Solution Approach 1:
The solution replaces the friction-based mechanical constraint system (engagement pin and engagement window relying on friction) with a pressing member system that provides direct contact pressure. This substitution eliminates the need for high friction, maintaining lift prevention while reducing driving power requirements and improving responsiveness.
Solution Approach 2:
The harmful friction element is extracted from the system by removing the engagement pin and engagement window mechanism. Instead, pressing members directly constrain the movable member through controlled pressure, eliminating the friction that caused reduced responsiveness and increased power consumption while maintaining lift prevention.
Data Source
AI summary
An image shake correction device includes a movement restrictor that restricts movement of a movable member in directions X, Y, θ, and Z. The movement restrictor includes a movement prevention member that is fixed to a base of a support member and prevents the movable member from moving in the direction Z while sandwiching the movable member in cooperation with the support member, a hole portion formed in the support member, and an insertion member that is formed in the movable member and is inserted into the hole portion. A wide width portion of the insertion member has a size that overlaps with the base of the support member even in a state in which an abutting portion of the insertion member is positioned in any position in the hole portion.