Optical Unit Shake Correction Drive Mechanism Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing optical units with shake correction functions face challenges in downsizing due to the large space occupied by magnetic drive mechanisms, which also limit the arrangement of flexible printed circuit boards, leading to potential load issues and reduced precision.
Innovation Solution
The optical unit is designed with a movable body that swings around two intersecting axes, allowing the shake correction drive mechanism to be disposed on only two faces, reducing its size and providing space for the flexible printed circuit board, while the lens drive mechanism is positioned opposite to the shake correction drive mechanism to minimize magnetic interference and enhance impact resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shake correction drive mechanism is disposed on all four faces of the movable body, then sufficient shake correction coverage is achieved, but the occupied space becomes excessively large
Solution Approach 1:
The patent extracts the shake correction drive mechanism from all four faces and positions it only on two opposite faces (first and second faces). This reduction removes unnecessary components while maintaining the essential shake correction functionality, directly resolving the contradiction between comprehensive coverage and space occupation.
Solution Approach 2:
The drive mechanism on two opposite faces serves multiple purposes: it provides shake correction coverage for the optical module while simultaneously creating available space for the flexible printed circuit board routing. This multi-functionality resolves the contradiction by making the same structural arrangement serve dual purposes.
2Reliability
If the flexible printed circuit board is routed along the side face of the movable body, then excessive load is prevented during swinging, but sufficient space for routing is not provided when drive mechanism occupies all faces
Solution Approach 1:
By extracting the drive mechanism from the third and fourth faces, the patent creates available space on these faces for routing the flexible printed circuit board. This allows the circuit board to be properly positioned and routed without excessive bending or load during movable body swinging.
3Volume of moving object
If the optical unit is downsized, then compactness is achieved, but space for both drive mechanism and circuit board routing becomes insufficient
Solution Approach 1:
The patent employs asymmetric space allocation where the first and second opposite faces are dedicated to the shake correction drive mechanism, while the third and fourth opposite faces are allocated for flexible printed circuit board routing. This asymmetric division allows both components to coexist in a compact configuration without interfering with each other, resolving the contradiction between downsizing and component space requirements.
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 compact optical unit with improved impact resistance, reduced power consumption, and enhanced precision by allowing efficient routing of the flexible printed circuit board and minimizing magnetic interference, thus achieving effective shake correction.
Implementation Method 1
The shake correction drive mechanism is a magnetic drive mechanism including magnets and coils
Implementation Method 2
The shake correction drive mechanism includes magnets disposed on side faces of the movable body, and coils disposed on the inner faces of the fixed body
Data Source
AI summary
An optical unit having a shake correction function may include a movable body including an optical module, a fixed body that supports the movable body via a gimbal mechanism, and a shake correction drive mechanism that swings the movable body around a first axis and a second axis intersecting each other. The shake correction drive mechanism may be disposed on two intersecting faces out of four faces of the movable body. A first flexible printed circuit board may be led out from one of the two faces, of which the shake correction drive mechanism is not disposed on either.