Telescoping Lens Barrel with Rotating Second Frame
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Solution Overview
Problem
Conventional lens barrels face limitations in achieving a more compact size while maintaining functionality, particularly in their stowed state, which restricts the miniaturization of imaging devices.
Innovation Solution
A telescoping lens barrel design incorporating a lens mount, a first frame, a linking portion, and a second frame, where the second frame is rotatably supported and can be stowed within the first frame's region along the optical axis, allowing for a more compact configuration without interfering with the linking portions, enabling efficient adjustment of the focal distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the lens barrel uses a conventional structure with manually movable lens groups along the optical axis, then the focal distance can be adjusted, but the total length of the lens barrel cannot be sufficiently reduced
Solution Approach 1:
The second frame is disposed more to the inner peripheral side than the linking portion and is supported rotatably with respect to the first frame, with its end on the lens mount side disposed within the region in which the linking portion is disposed along the optical axis direction. This nesting arrangement allows the second frame to be stored within the space occupied by the linking portion, reducing the overall lens barrel length while maintaining manual operability for focal distance adjustment
Data Source
AI summary
The imaging device includes a lens barrel, which itself includes a first frame, a second frame rotatably supported by the first frame, a lens mount including a contact face that comes into contact with the main body of a camera body, and a linking portion for linking the lens mount and the first frame on the outside of the contact face, with at least part of the second frame being disposed between the linking portion and the contact face along the optical axis direction; and an imaging element for converting an optical image formed by the lens barrel into image data.