Imaging Lens Barrel with Adjustable Operation Angle
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing imaging lens barrels have complex structures that do not allow for easy adjustment of the operation angle, making them unsuitable for various applications such as movie production and report photography, where different focus operation angles are required.
Innovation Solution
A simple imaging lens barrel design featuring a cylindrical cam ring with a rotatable gear and an operation ring that can change its actuation angle by meshing with different gears, allowing for adjustable rotation angles without altering the number of rotations, thus accommodating different operational needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple focus modes (precise adjustment mode and quick adjustment mode) are implemented by adding switching mechanisms, then the adaptability to different use conditions is improved, but the device complexity increases significantly
Solution Approach 1:
The operation ring is made movable in the optical axis direction and can switch between two positions: first position for precise adjustment mode and second position for quick adjustment mode. This dynamic repositioning allows the same operation ring to provide different operation angles (300° for precise mode, 120° for quick mode) without adding complex switching mechanisms, thereby improving adaptability while maintaining simple structure
Solution Approach 2:
A single operation ring serves multiple functions by changing its position along the optical axis. When positioned at the first location, it enables precise adjustment mode with larger operation angle; when positioned at the second location, it enables quick adjustment mode with smaller operation angle. This multi-functionality eliminates the need for separate rings or complex switching mechanisms for different focus modes
2Ease of operation
If the operation ring is made movable in the optical axis direction to switch between positions, then the ease of operation is improved for different modes, but the device complexity increases due to additional positioning mechanisms
Solution Approach 1:
The operation ring utilizes its own weight and the elastic force of a spring to automatically switch between positions. When the user releases the operation ring, it automatically returns to the default position (precise adjustment mode) without requiring additional actuators or complex positioning mechanisms. This self-service mechanism improves ease of operation while avoiding additional complexity
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 design provides a straightforward structure that allows for appropriate operation angles to be achieved based on use, enabling efficient one-hand operation and reducing the complexity of switching between focus modes.
Implementation Method 1
When a force is transmitted to the gear, the force is transmitted to the cam ring. Accordingly, the cam ring is rotated about the optical axis.
Implementation Method 2
a first operation ring gear meshing with the gear of the cam ring is formed at one end portion in the direction of the optical axis
Implementation Method 3
a second operation ring gear meshing with the cam gear of the cam ring is formed at the other end portion in the direction of the optical axis
Data Source
AI summary
An appropriate operation angle (actuation angle) corresponding to a use is obtained by a relatively simple structure.A focus ring 20 is mounted around a focus cam 10. When the focus ring 20 is moved to a front end side, a gear formed in the focus ring 20 meshes with a gear 17 of the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10. When the focus ring 20 is moved to a rear end side, the gear formed in the focus ring 20 meshes with pinions 15 mounted on the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10 through the pinions 15. A half of the rotation angle of the focus ring 20 is the same as the rotation angle of the focus cam 10.