Lens Barrel Vibration Isolation Pin Mechanism
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Solution Overview
Problem
Existing lens barrels with image blur correction mechanisms experience oscillation phenomena due to vibrations when shifting lenses, particularly when heavy, leading to image degradation.
Innovation Solution
A lens barrel design incorporating a cam cylinder and a second cylinder with a vibration isolation pin, which moves in a direction different from the optical axis to engage with the cam cylinder, preventing oscillation by distributing mass and reducing vibration amplification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple straight advance mechanisms are engaged to linearly guide taking lenses, then linear guidance precision is improved, but oscillation phenomenon occurs due to vibration amplification when only part of the mechanisms are engaged
Solution Approach 1:
The guidance system is divided into two independent but cooperative mechanisms: straight advance mechanisms for precise linear guidance and the vibration isolation pin mechanism for suppressing oscillations. This segmentation allows each mechanism to specialize in its function while working together to achieve both precision and stability.
Solution Approach 2:
The vibration isolation pin acts as an intermediary element that connects the lens holding member to the lens barrel. It transmits linear motion while isolating and damping vibrational oscillations, thereby mediating between the driving force and the guided lens to prevent oscillation amplification.
2Reliability
If heavy lenses are used in the image blur correction mechanism, then correction effectiveness is improved, but oscillation phenomenon is more likely to occur due to increased vibration
Solution Approach 1:
The vibration isolation pin mechanism provides a counteracting force against the vibrations generated by heavy lenses during image blur correction. By engaging this mechanism, the system counterbalances the harmful oscillations while maintaining the corrective function of the heavy lens.
Solution Approach 2:
The vibration isolation pin is designed to engage beforehand with the cam groove to cushion and dampen vibrations before they can amplify into oscillation phenomena. This preventive cushioning protects the lens barrel stability even when heavy lenses are in operation.
3Device complexity
If straight advance mechanisms are disengaged in certain areas, then device complexity is reduced, but oscillation phenomenon occurs due to incomplete vibration suppression
Solution Approach 1:
The guidance system is divided into two independent but cooperative mechanisms: straight advance mechanisms for precise linear guidance and the vibration isolation pin mechanism for suppressing oscillations. This segmentation allows each mechanism to specialize in its function while working together to achieve both precision and stability.
Solution Approach 2:
The vibration isolation pin mechanism serves multiple functions: it guides linear motion, suppresses oscillations, and maintains stability even when straight advance mechanisms are disengaged. This multi-functionality ensures continuous vibration suppression without requiring all straight advance mechanisms to remain engaged.
Data Source
AI summary
A lens barrel that prevents an oscillation phenomenon caused by vibrations occurring when a lens of an image blur correction mechanism shifts. A first cylinder is engaged in the cam cylinder and caused to move in a direction of an optical axis by rotation of a cam cylinder. A second cylinder supports a lens holding member, which moves in a direction different from a direction of an optical axis so as to correct for an image blur, and is engaged in the cam cylinder and caused to move in the direction of the optical axis by rotation of the cam cylinder. The second cylinder has a first vibration isolation pin that is engaged with the first cylinder movably in the direction of the optical axis.