Optical Element Drive Layout for Tilt-Stable Miniaturization
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Solution Overview
Problem
Conventional optical element driving mechanisms experience tilting or deflection due to an imbalance between the center of mass and the rotational center, leading to instability and increased size.
Innovation Solution
An optical element driving mechanism with a connecting element closer to the center of mass, a supporting element for stability, and multiple driving assemblies for precise motion control, minimizing the distance between the fulcrum and overall center of mass to prevent tilting and achieve miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the connecting element is positioned closer to the movable portion, then the mechanism achieves miniaturization and reduced size, but the center of mass becomes imbalanced causing tilting and deflection
Solution Approach 1:
The patent introduces a counterweight portion that extends from the fixed portion toward the movable portion, positioned to balance the center of mass relative to the rotational center. This counterweight compensates for the imbalanced mass distribution caused by placing the connecting element closer to the movable portion, thereby preventing tilting and deflection while enabling mechanism miniaturization.
Solution Approach 2:
The patent employs asymmetric positioning of the connecting element, placing it closer to the movable portion rather than at the center of the connecting element. This asymmetric arrangement reduces the overall mechanism size while the counterweight portion is specifically designed to compensate for the resulting mass imbalance, creating a deliberate asymmetric mass distribution that achieves both compactness and stability.
2Manufacturing precision
If multiple driving assemblies are added to achieve precise motion control, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the motion control function into multiple independent driving assemblies, each responsible for specific degrees of freedom (e.g., first driving assembly for rotation around first axis, second driving assembly for rotation around second axis). This segmentation enables precise control of complex motions while allowing each driving assembly to be optimized independently, managing overall system complexity through modular functional decomposition.
Solution Approach 2:
The driving assemblies are designed with universal functionality to control multiple degrees of freedom. Each driving assembly can contribute to multiple motion dimensions, and the system uses coordinated control of these multi-functional assemblies to achieve precise positioning without requiring separate dedicated actuators for every degree of freedom, thereby reducing overall complexity.
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
Stabilizes the mechanism against gravity and external forces, reducing size while ensuring precise optical element positioning and motion control.
Implementation Method 1
the connecting element is a spring
Data Source
AI summary
An optical element driving mechanism is provided. The optical element driving mechanism includes a fixed portion, a movable portion, and a connecting element. The movable portion is movable relative to the fixed portion. The connecting element connects the fixed portion and the movable portion. The connecting position of the fixed portion and the connecting element is closer to the center of the connecting element than the connecting position of the movable portion and the connecting element.