Electromagnetic Shutter with Movable Stops for Adjustable Aperture
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Solution Overview
Problem
Existing shutter assemblies lack adjustability in shutter aperture size, fail to dampen component movement effectively, and are complex, leading to increased cost, reduced reliability, and limited precision in controlling shutter blade movement.
Innovation Solution
The shutter design incorporates movable stops with dampers, an iris aperture mechanism, and sensors to adjust aperture size, control blade movement, and improve precision, using a drive ring and actuation assembly to transition blades between open and closed positions while minimizing unnecessary travel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If known shutters use complicated linkages and control strategies to adjust shutter aperture size, then aperture adjustability is achieved, but device complexity increases
Solution Approach 1:
The patent extracts the aperture size adjustment function from the traditional linkage system by using movable stops that can be independently positioned. Instead of complex linkages connecting multiple components, the invention uses separate, adjustable stop elements that directly limit blade travel, simplifying the overall structure while maintaining aperture adjustability.
Solution Approach 2:
The patent implements dynamic adjustability by making the stops movable rather than fixed. The stops can be repositioned to change the aperture size, and the shutter blades can be dampened at different positions depending on the aperture setting. This dynamic configuration allows aperture adjustment without requiring complex mechanical linkages.
2Adaptability or versatility
If known shutters use more mechanical components to control shutter aperture, then aperture adjustability is achieved, but manufacturing cost increases
Solution Approach 1:
The invention removes unnecessary mechanical components from traditional shutter designs. By using independent movable stops instead of complex linkage systems, the number of parts that need to be manufactured and assembled is reduced, thereby lowering manufacturing costs while preserving aperture adjustability.
Solution Approach 2:
The movable stops serve multiple functions: they limit the travel of shutter blades to control aperture size, and they can be coupled with dampers to control blade movement characteristics. This multi-functionality reduces the need for separate components, simplifying manufacturing.
3Adaptability or versatility
If known shutters use traditional linkage systems to adjust aperture, then aperture control is achieved, but reliability decreases
Solution Approach 1:
The patent eliminates the linkage system that connects various shutter components, which is a source of potential failure points. By using independent movable stops that directly interact with the shutter blades, the invention reduces the number of moving connections, thereby improving reliability while maintaining aperture adjustability.
Solution Approach 2:
The movable stops are designed to be self-adjusting and self-limiting. They automatically control the aperture size and blade travel without requiring complex control mechanisms, reducing the likelihood of mechanical failure and improving overall system reliability.
4Productivity
If known shutters allow full travel of shutter blades, then complete exposure is achieved, but component wear increases
Solution Approach 1:
The patent implements dynamic travel limitation by using movable stops that can be positioned at different locations. The stops limit the travel of shutter blades to the minimum necessary for complete exposure, preventing excessive movement that would cause wear. The dampers coupled to the stops provide controlled deceleration, further reducing impact and wear on components.
Solution Approach 2:
The dampers are positioned at the stops to provide cushioning before the shutter blades complete their travel. This beforehand cushioning reduces the impact and wear on the blades and other components by smoothly decelerating them at the limit positions, while still allowing complete exposure through the aperture.
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
This design allows for adjustable aperture size, reduced wear, improved reliability, and precise control of shutter blade movement, enhancing operational characteristics and reducing complexity.
Implementation Method 1
The shutter may include a voice coil and permanent magnets configured to cooperate with one another to impart motion to the drive ring
Implementation Method 2
to dampen component movement effectively
Data Source
AI summary
A shutter includes a driver ring, a plurality of shutter blades coupled to the drive ring such that movement of the drive ring transitions the plurality of shutter blades between an open position exposing a central aperture of the shutter, and a closed position blocking the central aperture, and a first stop and a second stop movable relative to the first stop. At least one of the first and second stops limits travel of the shutter blades.