Blade Drive Device Actuator Magnetic Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing blade drive devices in optical instruments face issues with maintaining desired driving properties due to magnetic interference between adjacent rotors of actuators, affecting the performance of blades.
Innovation Solution
The blade drive device incorporates a design where first and second actuators, each with stators, rotors, and coils, are arranged such that the rotors sandwich at least one of the coils, preventing magnetic interference and ensuring desired driving properties for the blades.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If two actuators are arranged adjacent to each other to drive different blades, then the device complexity is reduced and space is saved, but the rotors magnetically influence each other causing deterioration of driving properties
Solution Approach 1:
A magnetic shielding member is introduced as an intermediary between the two rotors to block magnetic field interference. The shielding member, made of magnetically permeable material, acts as a mediator that redirects magnetic flux away from the adjacent rotor, preventing harmful magnetic influence while allowing the actuators to remain in compact adjacent positions.
Solution Approach 2:
The magnetic shielding member is strategically positioned only in the specific region where magnetic interference occurs between adjacent rotors. This localized approach applies magnetic shielding properties precisely where needed, without requiring complete redesign of the entire actuator structure or increasing overall device size.
2Volume of moving object
If the rotors are positioned close to each other to reduce device size, then the volume is reduced, but magnetic interference between rotors increases causing loss of driving precision
Solution Approach 1:
The magnetic shielding member serves as a mediator that enables close positioning of rotors by blocking their mutual magnetic interference. This allows the design to achieve compact volume while maintaining driving precision, as the shielding member prevents magnetic field from one rotor from affecting the adjacent rotor's operation.
Solution Approach 2:
The magnetic shielding member converts the harmful magnetic interference into a controlled magnetic path. By providing a dedicated magnetic shielding structure, the design transforms potential harmful magnetic interaction into a manageable element that can be accounted for in the overall magnetic circuit design.
3Area of stationary object
If actuators are placed adjacent to each other to improve compactness, then the device becomes more compact, but magnetic influence between rotors causes instability in blade operation
Solution Approach 1:
The magnetic shielding member acts as a stable intermediary that consistently blocks magnetic interference between adjacent rotors throughout operation. This ensures stable blade operation by preventing magnetic field fluctuations from one actuator from affecting the adjacent actuator, maintaining operational reliability in a compact configuration.
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 arrangement ensures stable and efficient operation of the blades by preventing magnetic influence between adjacent rotors, thereby maintaining consistent driving properties and improving the shutter speed and size reduction of the blade drive device.
Implementation Method 1
first and second actuators respectively include first and second stators, first and second rotors, and first and second coils
Data Source
AI summary
A blade drive device includes: a board including an opening; first and second blades opening and closing the opening; and first and second actuators arranged adjacent to each other and respectively driving the first and second blades, wherein the first and second actuators respectively include first and second stators, first and second rotors, and first and second coils, and the first and second rotors is arranged to sandwich at least one of the first and second coils.