Lens Barrel Decorative Ring Concealing Adjustment Mechanism
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Solution Overview
Problem
Existing lens barrels face challenges in maintaining external appearance quality due to visible optical axis adjustment mechanisms, which can make the lenses appear defective and affect aesthetic appeal.
Innovation Solution
A lens barrel design that incorporates a decorative ring between the inner and outer peripheries of the first lens frame, where the first portion of the lens frame is positioned closer to the image side than the second portion by a distance exceeding the maximum displacement caused by adjustment, with both portions having a stepped or tapered shape and similar hue to the decorative ring, enhancing the external appearance by concealing the adjustment mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a decorative ring is disposed on the front side of the lens frame to cover and hide the optical axis adjustment mechanism, then the external appearance quality is improved, but the optical axis adjustment mechanism becomes concealed and may cause visibility issues
Solution Approach 1:
A third frame (decorative ring) is introduced as an intermediary element between the first frame (lens frame) and the second frame (adjustment mechanism frame). This decorative ring serves dual purposes: it improves external appearance by covering the adjustment mechanism while maintaining visibility through its semi-transparent or translucent property, thus resolving the contradiction between aesthetic quality and mechanism visibility.
2Ease of operation
If the first portion of the second frame is positioned closer to the image side to accommodate adjustment displacement, then the adjustment mechanism has sufficient movement space, but the gap between frames increases affecting appearance
Solution Approach 1:
The second frame (holding the adjustment mechanism) is nested within the third frame (decorative ring), which itself is nested within the first frame (lens frame). This nested structure allows the first portion of the second frame to be positioned closer to the image side for adequate adjustment movement while the third frame fills the visual gap, maintaining a compact and aesthetically pleasing appearance.
3Difficulty of detecting and measuring
If the decorative ring is made transparent or translucent to maintain visibility, then the optical axis adjustment mechanism remains visible, but the external appearance quality may be compromised
Solution Approach 1:
The third frame (decorative ring) employs local quality by having different transparency characteristics in different regions or contexts. It is designed to be semi-transparent or translucent specifically where the adjustment mechanism needs to be visible, while maintaining aesthetic appearance in other areas. This localized variation in transparency resolves the contradiction between visibility and appearance quality.
Data Source
AI summary
The lens barrel includes a first frame, a second frame that holds a lens positioned closest to an object side, that is accommodated in the first frame, and of which a position and/or a degree of inclination is adjustable with respect to the first frame, and a third frame that is attached to the first frame and that is disposed between an inner periphery of the first frame and an outer periphery of the second frame as seen from the object side. In the lens barrel, a first portion of the second frame that is positioned closest to the object side in an optical axis direction is disposed between a second portion of the third frame that is positioned closest to the object side and a third portion of the third frame that is positioned closest to an image side.