Shutter Unit Load Distribution for High-Speed Imaging
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Solution Overview
Problem
Conventional shutter units in image pickup apparatuses face challenges in achieving high-speed continuous imaging while maintaining a small size, as the simultaneous operation of blade driving and braking members increases peak load and decreases motor rotational velocity, requiring larger motors and increasing the unit's size.
Innovation Solution
A shutter unit design that includes a base plate, blade members, a driving member, a braking member, and a charging member, where the driving member is rotated by a biasing force to a traveling completion position, and the braking member decelerates it, with the charging member then moving the driving and braking members to a standby position, distributing the load and reducing the size of the unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the braking member operates simultaneously with the blade driving member during charging, then the blade can be decelerated immediately before traveling completion, but the peak load during driving increases and motor rotational velocity decreases
Solution Approach 1:
The braking member is operated in advance during the imaging process (from traveling completion position to standby position) rather than simultaneously during charging. This preliminary positioning allows the brake to be ready when needed without adding peak load during the high-speed charging operation, thus maintaining motor rotational velocity while still providing deceleration capability when required.
2Productivity
If a large motor is used to improve continuous imaging speed by handling increased peak load, then the imaging speed increases, but the size of the shutter unit increases
Solution Approach 1:
The braking member is positioned in advance during imaging rather than operated simultaneously with charging, eliminating the need for oversized motors to handle peak loads during charging. This allows the use of a smaller motor that can maintain high rotational velocity during charging operations, thereby reducing the overall shutter unit size while preserving high-speed continuous imaging capability.
3Reliability
If the braking member operates from traveling completion position to standby position during blade driving, then deceleration is provided, but the motor rotational velocity decreases
Solution Approach 1:
The braking member is operated in advance during imaging to position itself at the standby position, rather than operating simultaneously during the charging stroke. This timing separation ensures that the braking operation does not interfere with the high-speed charging operation, maintaining motor rotational velocity while still providing necessary deceleration and shock reduction when the blade approaches traveling completion.
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 enables high-speed continuous imaging and reduces the size of the shutter unit by distributing the load and maintaining efficient motor operation, thereby improving frame rates and reducing the need for large motors.
Implementation Method 1
a driving member (410, 510), a brake unit (600), and a charging member (315, 317)
Implementation Method 2
The braking member is configured to cause the driving member to decelerate by coming into contact with the driving member
Data Source
AI summary
A shutter unit includes a base plate on which an opening is formed, at least one blade member, a driving member configured to be rotatably supported by the base plate and to drive, in imaging, the blade member from a standby position to a traveling completion position by using a biasing force of a biasing member, a braking member configured to cause the driving member to decelerate by coming into contact with the driving member, and a charging member configured to cause the driving member to operate to the standby position after causing the driving member to operate from the traveling completion position to a set position against the biasing force of the biasing member, and cause the braking member to operate from the traveling completion position to the standby position while causing the driving member to operate from the set position to the standby position.