Rotating Barrier Vane Lens Barrel with Latching Mechanism
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Solution Overview
Problem
Conventional lens barrels with complicated, stepped barrier vanes risk increasing in size and experiencing loose vanes due to increased diameter and number of vanes, compromising protection and functionality.
Innovation Solution
A lens barrel design featuring rotating barrier vanes with a rotating shaft, annular barrier sliding frame, and stationary frame, utilizing latching components to maintain vane alignment and prevent loosening, while allowing for a larger aperture without increasing size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If barrier vanes with complicated, stepped shape are used to balance load, then load distribution is improved, but the thickness of barrier vanes increases causing the lens barrel to be larger in the optical axis direction
Solution Approach 1:
The barrier vanes are divided into multiple groups (first barrier vane group and second barrier vane group) with different functional characteristics. The first group handles primary load bearing while the second group provides support and stability, allowing each segment to be optimized independently for load distribution without increasing overall thickness.
Solution Approach 2:
The barrier vanes are designed to rotate dynamically around the optical axis during operation. This rotational capability allows the vanes to adapt their orientation to optimize load distribution across different operational states, achieving balanced load bearing without requiring increased thickness through static stepped structures.
2Area of stationary object
If the number of barrier vanes is increased to reduce outside diameter, then the lens barrel diameter is reduced, but the barrier vanes may come loose from the barrier sliding frame
Solution Approach 1:
The barrier vanes are combined with latching components that integrate directly into the barrier sliding frame structure. This merging of the vane assembly with the frame creates a unified structure where the vanes are mechanically interlocked, preventing loosening even when multiple vanes are used to reduce the overall diameter.
Solution Approach 2:
Latching components serve as intermediary elements between the barrier vanes and the barrier sliding frame. These latching components provide a mechanical connection that secures the vanes to the frame, acting as a mediator that prevents the vanes from coming loose while allowing the increased number of vanes to maintain a reduced outside diameter.
Data Source
AI summary
A lens barrel 10 comprises a first lens group frame 29, a rotating shaft 30, a plurality of barrier vanes 23a to 26b, an annular barrier sliding frame 28, and an annular stationary frame 27. The plurality of barrier vanes 23a to 26b rotate around the rotating shaft 30, and switch between an open state of exposing the surface of a first lens L1 in an imaging state, and a closed state of covering the surface of the first lens L1 in a collapsed state. The annular barrier sliding frame 28 is disposed on the subject side of the first lens group frame 29, and rotates the plurality of barrier vanes 23a to 26b upon rotating relatively around the optical axis with respect to the first lens group frame 29. The stationary frame 27 is disposed between the plurality of barrier vanes 23a to 26b and the barrier sliding frame 28 and fixed with respect to the first lens group frame 29, and supports the plurality of barrier vanes 23 a to 26b from the opposite side from the subject.