Manually Operated Ring Drive for Lens Range Feedback Control
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Solution Overview
Problem
Conventional accessory coupling devices for camera systems fail to recognize the characteristics of movable lenses, risking excessive rotation beyond the movable range of the lens barrel.
Innovation Solution
A camera system with a manually operated ring drive device that includes a drive gear, drive unit, and a base part, which allows for mechanical and electrical connections to the camera body and lens barrel, enabling control based on lens characteristics to prevent excessive movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional accessory coupling device is used to rotate the manually operated ring, then the device can be universally applied regardless of lens barrel size, but the device cannot recognize lens characteristics and may rotate the ring beyond the movable lens range
Solution Approach 1:
The patent implements a feedback mechanism where the accessory coupling device receives information about the movable lens characteristics (such as movable range) from the lens barrel through electrical connection portions, and uses this information to control the rotation of the manually operated ring, preventing excessive rotation beyond the lens movable range
Solution Approach 2:
The patent performs preliminary action by acquiring lens characteristics information before the rotation operation begins. The control unit stores and processes the movable lens characteristics data in advance, enabling the device to adjust its rotation control parameters before actual operation to ensure accurate and safe rotation within the lens movable range
2Ease of operation
If the manually operated ring is allowed to rotate freely, then the ease of operation is improved, but the risk of rotating beyond the movable lens range increases
Solution Approach 1:
The control unit continuously monitors the rotation position of the manually operated ring and compares it with the stored movable lens characteristics, providing real-time feedback control to prevent the ring from rotating beyond the safe range while maintaining ease of operation within the valid range
Solution Approach 2:
The patent applies preliminary anti-action by pre-setting the rotation limits based on lens characteristics and actively preventing rotation beyond these limits through control signals to the drive unit, thereby counteracting the potential harmful effect of excessive rotation before it can occur
Data Source
AI summary
A manually operated ring drive device includes a manually operated ring drive device configured to rotationally drive a manually operated ring that moves a movable lens included in a lens barrel mounted to a camera body back and forth in an optical axis direction, including a drive gear that is provided at a position that makes direct or indirect contact with the manually operated ring configured to change an optical characteristics of the movable lens included in the lens barrel, and configured to rotate while in contact with the manually operated ring to rotate the manually operated ring, a drive unit configured to rotationally drive the drive gear, and a base part that has a surface to which the camera body is connected, and a part on which the drive unit is disposed.