Optical Element Driving Device with Adjustable Support for Tolerance Compensation
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Solution Overview
Problem
The existing optical element driving devices, such as those described in PTL 1, face instability due to manufacturing tolerances, leading to individual differences in component dimensions, which result in unstable support of the lens holder and potential rattling during operation.
Innovation Solution
The optical element driving device incorporates a support system with first and second support parts that allow adjustment of the engagement position between the support parts and the holding part, enabling stable movement of the optical element by pressing the holding part and engaging it with the support parts, which can absorb individual differences in component dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rigid support structure with fixed engagement positions is used, then the structural stability is improved, but the adaptability to manufacturing tolerances deteriorates
Solution Approach 1:
The support part is designed with movable facing portions that can relatively displace in the circumferential direction, transforming the rigid fixed engagement structure into a dynamic adjustable one. This allows the engagement position to adapt to manufacturing tolerances while maintaining stable support through controlled movement.
Solution Approach 2:
The engagement position between the support part and holding part is made adjustable by changing the positional parameters through relative displacement of facing portions. This parameter change capability allows the system to accommodate variations in component dimensions while maintaining stable operation.
2Manufacturing precision
If precise fixed engagement positions are specified, then the manufacturing precision requirement is improved, but the ease of manufacture deteriorates
Solution Approach 1:
Instead of requiring precise fixed engagement positions, the design allows dynamic adjustment through relative displacement of facing portions. This reduces manufacturing precision requirements while maintaining operational stability, making assembly easier and more tolerant of variations.
3Device complexity
If a simple support structure is used, then the device complexity is reduced, but the reliability deteriorates due to rattling
Solution Approach 1:
The support structure incorporates dynamic adjustment capability through movable facing portions that can relatively displace. This adds minimal complexity while significantly improving reliability by eliminating rattling through adaptive engagement that maintains stable contact despite manufacturing variations.
Data Source
AI summary
An optical element driving device driving an optical element in the optical path direction includes: a holding part capable of holding the optical element; an housing part that surrounds a circumference of the holding part and houses the holding part; and inside the housing part, a support part including a first support part and a second support part disposed on the circumference at different positions, and supports the holding part to be movable in the optical path direction by pressing the holding part by the first support part and engaging the second support part with the holding part in accordance with the pressing. The support part is configured to allow adjustment of an engagement position between the second support part and the holding part by relatively displacing facing portions of the second support part and the holding part in a circumferential direction according to the pressing.