Image Shake Correction Device Movement Restriction Mechanism
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Solution Overview
Problem
Existing image shake correction devices face challenges in achieving both weight reduction and size reduction while maintaining effective responsiveness, as reducing the installation area of pressing members can lead to lifted movable members and increased power requirements due to frictional issues.
Innovation Solution
An image shake correction device with a movable member supported by a support member and a movement restriction unit, featuring a hole portion and an insertion member with a wide width portion that prevents movement perpendicular to the light receiving surface, allowing for reduced installation area without lifting the movable member, and improved responsiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the installation area of the pressing member is reduced to achieve weight reduction and size reduction, then the weight and size of the image shake correction device are reduced, but the movable member cannot be effectively prevented from being lifted
Solution Approach 1:
The pressing member is divided into a pressing portion that contacts the movable member and a restriction portion that extends into the hole portion. This segmentation allows the pressing member to perform both pressing and movement restriction functions with a reduced installation area, effectively preventing lifting while maintaining compact size.
Solution Approach 2:
The restriction portion of the pressing member is inserted into the hole portion formed in the support member, creating a nested structure. This nesting allows the pressing member to be securely positioned and prevents the movable member from being lifted, while minimizing the overall installation area and achieving weight reduction.
2Reliability
If friction between engagement pin and engagement window is increased to prevent lifting, then the movable member is prevented from being lifted, but the responsiveness of driving is reduced and power required for driving is increased
Solution Approach 1:
The insertion member acts as an intermediary between the movable member and the hole portion. It provides movement restriction through its geometric fit in the hole portion rather than through friction, thereby preventing lifting while maintaining smooth movement with minimal power requirement.
3Area of stationary object
If the installation area of the pressing member is reduced, then the size of the image shake correction device is reduced, but the movable member cannot be effectively prevented from being lifted
Solution Approach 1:
The pressing member is divided into a pressing portion and a restriction portion. The restriction portion extends into the hole portion to provide movement restriction, while the pressing portion maintains contact with the movable member. This segmentation enables effective lifting prevention with minimal installation area.
Solution Approach 2:
The restriction portion extends in a direction perpendicular to the pressing direction, utilizing the depth dimension of the hole portion. This dimensional transition allows the pressing member to prevent lifting without requiring increased installation area on the pressing surface.
Data Source
AI summary
An image shake correction device (3) includes a movable member (2), a support member (1) including a movement prevention member (1B, 1C) for preventing the movable member (2) from being lifted, and a movement restriction unit that restricts a movement range of the movable member (2). The movement restriction unit includes a hole portion (11a) formed in the support member (1) and an insertion member (28a) inserted into the hole portion (11a) formed in the movable member (2). The insertion member (28a) has an abutting portion (283a) that moves in the hole portion (11a) in directions X, Y, and θ with the movement of the movable member (2), and a wide width portion (281a) which is wider than the abutting portion (283a).