Interchangeable Lens Camera Focus Ring Position Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In lens interchangeable camera systems, the focus ring can unintentionally slide, leading to erroneous operations between absolute and relative position indication types, causing incorrect focus settings.
Innovation Solution
A camera system with a mode setting section that switches between auto focus and manual focus, featuring an annular operation member that can slide to two positions, equipped with detection sections to accurately determine the position and rotation of the operation member, ensuring correct focus control based on the detected positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the focus ring is designed to slide between two positions for switching focus operation types, then the ease of operation and adaptability are improved, but the reliability deteriorates due to unintentional sliding and erroneous operations
Solution Approach 1:
The patent implements detection sections that continuously monitor the slide operation member's position and provide feedback signals to the control section. This feedback mechanism ensures that the system accurately recognizes whether the operation member is at the first or second position, preventing erroneous operations while maintaining the dual-position switching functionality for different focus operation types
Solution Approach 2:
The patent introduces a control section as an intermediary between the slide operation member and the focus operation execution. This control section receives detection results from the detection sections and intermediates the switching process, ensuring that focus operations are only executed when the correct position is confirmed, thereby preventing unintentional sliding from causing erroneous operations
2Ease of operation
If the operation member is made slideable for position indication switching, then the ease of operation is improved, but the stability of the position setting deteriorates due to unintentional position changes
Solution Approach 1:
The detection sections continuously monitor the operation member's position and provide real-time feedback to the control section. This feedback ensures that any unintentional position changes are immediately detected and can be corrected or prevented from causing erroneous operations, thereby maintaining stability while preserving slideability
Solution Approach 2:
The system automatically detects and responds to position changes through the detection sections and control section, without requiring additional user confirmation or intervention. This self-service mechanism ensures that unintentional sliding does not lead to erroneous operations, as the system autonomously verifies the intended position before executing focus operations
Data Source
AI summary
A lens interchangeable type camera system, comprising an interchangeable lens and a camera body, comprising a first control section that carries out manual focus control by detecting rotation direction and rotation amount of an operation member, in accordance with a manual focus mode command from a mode setting at a time when the operation member is at the first position, and a second control section that, when the operation member is at a second position, irrespective of a command from a mode setting section, notifies a detection result of a first detection section to the camera body, detects rotational position of the operation member using a third detection section, and forcibly carries out manual focus control based on a rotation position, wherein the lens interchangeable type camera system further comprises a function restriction section that sets operation of the second control section to valid or invalid.