Blade Driving Device Actuator Arrangement for Thin Optical Aperture
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Solution Overview
Problem
Existing blade driving devices face challenges in increasing output while maintaining a reduced thickness, as simply increasing coil turns leads to increased electric wire length and resistance, resulting in device thickening, which is undesirable in modern optical apparatuses.
Innovation Solution
The blade driving device design features actuators that extend along a specific direction and are arranged in a perpendicular direction on the substrate, allowing for increased coil length without thickening, with optional overlapping of driving members to minimize size increase, and incorporates speed governing mechanisms like gears to set driving speed and torque.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the winding number of the coil is increased to increase the output of the actuator, then the output increases, but the electric wire length and resistance increase, resulting in reduced winding efficiency and increased device thickness
Solution Approach 1:
The patent changes the spatial arrangement of coils from a conventional configuration to one where coils of different actuators are arranged in parallel along the first direction (intersecting the aperture axis) rather than stacking them in the thickness direction. This dimensional reorganization allows increased coil length and turn number without increasing device thickness, as coils are extended along the plane of the substrate rather than stacking vertically.
2Power
If the winding number of the coil is increased to increase the output, then the ampere-turn increases, but the coil thickening occurs, increasing the device thickness
Solution Approach 1:
The patent arranges coils of multiple actuators in parallel along the first direction (X-direction intersecting aperture axis) rather than stacking them in the thickness direction (Z-direction). This allows the coil length to increase along the substrate plane while keeping the coil thickness and device overall thickness controlled, enabling higher ampere-turn without proportional thickness increase.
Solution Approach 2:
The patent divides the actuator system into multiple independent actuators (first and second actuators) with separate coils arranged in parallel. This segmentation allows each coil to be optimized independently and arranged spatially to maximize length in the plane while minimizing thickness accumulation, rather than having all coils stacked in a single thick structure.
3Power
If the coil length is increased to increase the number of turns, then the output increases, but the device size increases in the first direction
Solution Approach 1:
The patent merges multiple actuators (first and second actuators) into a compact arrangement where they share the same spatial envelope along the first direction. By arranging coils in parallel and overlapping driving members, the total device footprint in the first direction is minimized while still accommodating the necessary coil length for increased turns and output.
Solution Approach 2:
The patent employs overlapping arrangement of driving members relative to actuators, creating a nested-like configuration where components are positioned to utilize the same spatial volume. This allows coil length to be extended without linearly increasing the device footprint, as components are layered and positioned to share space efficiently.
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 effectively suppresses size increase while enhancing output, enabling high-speed aperture operation with small thickness and high performance in optical apparatuses.
Implementation Method 1
first and second actuators for driving the first and second blades, in which the 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 driving device according to the present invention includes: a substrate having an aperture; a first blade and a second blade which open and close the aperture; a first driving member which drives the first blade; a second driving member which drives the second blade; a first actuator which operates the first driving member; and a second actuator which operates the second driving member, wherein the first actuator and the second actuator extend along a first direction which intersects an axial direction of the aperture on a primary surface of the substrate and are arranged in a second direction which intersects the axial direction and the first direction.