Image Stabilization Flex Cable Layout for Compact Lens Motion
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Solution Overview
Problem
Existing image stabilization apparatuses face challenges in maintaining compactness and preventing image stabilization performance degradation due to flexible substrate bending errors and contact issues with fixed members, which lead to discontinuous driving loads and excessive driving power.
Innovation Solution
The image stabilization apparatus employs a movable flexible substrate fixed between the movable and fixed members, forming a U-turn configuration that allows for orthogonal movement of the lens while minimizing space and reducing driving load by using a U-turn movable portion with deformable extensions, preventing contact with other components and maintaining stable assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the flexible substrate is bent in a predetermined shape in the longitudinal direction and disposed in the assembly process, then the movable member can move relative to the fixed member, but the bent position and bent angle scatter viewed from the optical axis direction causing the shape to deviate from the desired shape, requiring sufficient space to prevent contact with fixed members
Solution Approach 1:
The flexible substrate is configured to extend in the width direction facing the optical axis direction, and is folded a number of times into a predetermined shape in the longitudinal direction. This multi-dimensional folding approach allows the substrate to accommodate movement while minimizing the space required in the optical axis direction, resolving the contradiction between reliability and space requirement.
Solution Approach 2:
The flexible substrate is symmetrically disposed in an idle space between the movable member and fixed member, with multiple folds nested within each other. This nesting configuration allows the substrate to compactly fit within the limited space while still providing the necessary flexibility for movement, preventing contact with fixed members during operation.
2Ease of operation
If the bent angle tilts from 90° orthogonal to the longitudinal direction, then the longitudinal direction tilts before and after the bent position, but contact with front and back walls in the optical axis direction must be prevented
Solution Approach 1:
The flexible substrate is pre-formed with a predetermined folded shape during manufacturing, ensuring the bent angles are precisely orthogonal (90°) to the longitudinal direction. This preliminary action eliminates the need for manual adjustment during assembly, preventing contact with front and back walls while maintaining ease of installation through simple placement.
3Manufacturing precision
If the force applied by the connector of the flexible substrate to the movable member largely biases within the movable range due to bending error, then the image stabilization is unavailable, but the driving power exceeds the permissible value at the end of the movable range
Solution Approach 1:
The flexible substrate is designed with specific geometric parameters including multiple folds at predetermined positions and orthogonal bent angles. By optimizing these parameters, the substrate maintains accurate positioning within the movable range under normal conditions, while the folded configuration allows it to accommodate end-range movements without generating excessive driving power, thus preventing image stabilization unavailability.
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 enhances image stabilization performance by reducing unnecessary space requirements, preventing contact with other components, and maintaining stable assembly, thereby ensuring effective image stabilization without excessive driving power.
Implementation Method 1
The flexible sheet member is a flexible sheet member in which a copper wiring pattern is sandwiched between a plurality of resin films, and the movable member may be hindered from smoothly moving depending on a detour method
Data Source
AI summary
An image stabilization apparatus includes a movable member configured to hold an image stabilization optical element, a fixed member holding the movable member movably in a direction crossing an optical axis, an electrical element mounted on the movable member, and a flexible sheet member electrically connecting the electric element to the fixed member. The flexible sheet member is fixed to the movable member and the fixed member so that the flexible sheet member is bent between the movable member and the fixed member.