Lens Device Rotation Suppression Using an Intermediate Barrel
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Solution Overview
Problem
Existing lens devices with tripod mounts suffer from rotational movement suppression mechanisms that apply excessive biasing forces, leading to deformation of optical systems and deterioration of resolution performance.
Innovation Solution
A rotational movement suppression mechanism that includes an intermediate barrel with a gap between the tripod mount ring and the optical member fixing barrel, utilizing fixing members to absorb deformation and maintain the optical system's positional integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the annular member is tightened in contact with the outer periphery of the lens barrel to suppress rotational movement, then rotational movement suppression is improved, but the optical system deforms and resolution performance deteriorates
Solution Approach 1:
An intermediate barrel is introduced between the operation ring and the fixed cylinder. The intermediate barrel acts as a mediator that absorbs the biasing force from the fastening member, preventing direct transmission of deformation to the fixed cylinder and optical system. This allows rotational movement suppression while maintaining optical system integrity.
Solution Approach 2:
The structure is divided into separate functional components: the operation ring for rotational adjustment, the intermediate barrel for force absorption, and the fixed cylinder for optical system mounting. This segmentation allows each component to perform its specific function without causing harmful effects to other parts.
2Stability of the object's composition
If a fastening member with movement stroke is used to suppress rotational movement, then rotational stability is improved, but the complexity of the device increases
Solution Approach 1:
The intermediate barrel serves multiple functions: it absorbs biasing force, prevents deformation transmission, and maintains the gap structure. The fixing members also serve dual purposes by both securing the intermediate barrel and maintaining the gap. This multi-functionality reduces the need for additional specialized components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The mechanism effectively suppresses rotational movement while preventing deformation of the optical system, thereby maintaining resolution performance and reducing positional changes.
Implementation Method 1
a fastening member that is provided on the operation ring, has a movement stroke in a direction intersecting the optical axis, and has a biasing portion at a distal end portion thereof
Data Source
AI summary
A rotational movement suppression mechanism of an operation ring that is provided on an outer periphery of a fixed cylinder fixing an optical system and that is rotationally movable around an optical axis, includes: a fastening member that is provided on the operation ring, has a movement stroke in a direction intersecting the optical axis, and has a biasing portion at a distal end portion thereof; an intermediate barrel that suppresses rotational movement of the operation ring by pressure from the biasing portion; and a plurality of fixing members that fix the intermediate barrel to the fixed cylinder, in which the plurality of fixing members fix the intermediate barrel in a state where a gap is present between the intermediate barrel and the fixed cylinder, and fix the intermediate barrel to be movable with respect to the fixing member in a direction intersecting the optical axis.