Light Adjustment Apparatus Magnetic Float Prevention
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Solution Overview
Problem
Existing light adjustment apparatuses for optical equipment face challenges in achieving stable and compact operation with a simple driving mechanism that prevents floating or rattling of light adjustment elements, which affects the reliability and efficiency of light flux control.
Innovation Solution
A light adjustment apparatus comprising a blade member with a rotation axis body, a shaft, and a yoke that utilizes a magnetic force to hold the rotation axis body in a floated state, allowing the blade member to rotate and adjust the light flux without floating or rattling, and is designed for compact integration with optical equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a light adjustment apparatus uses a simple driving mechanism with magnetic force to hold the rotation axis body, then the device complexity is reduced, but the rotation axis body may float or rattle during operation, reducing reliability
Solution Approach 1:
The patent applies magnetic force as a counteracting force to hold the rotation axis body in a floated state, preventing it from floating or rattling during operation. The magnet is embedded in the rotation axis body, and the yoke receives its magnetic force, creating a stable magnetic field that counteracts gravitational and operational forces, ensuring reliable operation while maintaining a simple driving mechanism without mechanical contacts.
2Productivity
If the light adjustment element is retracted from the light path, then the light flux can pass freely, but the mechanism requires more complex movement control to achieve precise retraction and insertion
Solution Approach 1:
The patent replaces complex mechanical movement mechanisms with a magnetic field-based system. The magnet embedded in the rotation axis body interacts with the yoke to control the blade member's position through magnetic force, eliminating the need for complex mechanical actuators, gears, or linkages to achieve precise retraction and insertion of the light adjustment element.
3Reliability
If the blade member is held firmly to prevent floating, then operational stability is improved, but the mechanism becomes more complex requiring additional support structures
Solution Approach 1:
The patent introduces a magnetic field as an intermediary between the blade member and the yoke to provide stable holding force. The magnet embedded in the rotation axis body creates a magnetic field that interacts with the yoke, providing firm holding force to prevent floating and rattling of the blade member without requiring additional mechanical support structures, brackets, or fastening mechanisms.
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 solution enables a stable swing operation of the light adjustment element, ensuring reliable light flux control and compact integration with optical equipment, such as cameras and endoscopes, by preventing floating and rattling while maintaining a simple driving mechanism.
Implementation Method 1
a yoke that holds the rotation axis body in a floated state with respect to the support substrate by receiving a magnetic force of the magnet included in the rotation axis body
Data Source
AI summary
The light adjustment apparatus of the present embodiment comprises a light adjustment part, a rotation axis body that supports a rotation arm that places and removes the light adjustment part in and out of a light path by swinging, and has a magnet installed therein, an electromagnetic drive source that forms a magnetic circuit including the rotation axis body on the circuit, and works an electromagnetic force on the magnet to rotate a rotational axis of the rotation axis body, and a float prevention part that magnetically restricts the rotation axis body, and prevents the rotation axis body from floating towards an axial direction of the rotational axis when the rotation axis body is rotated.