Shutter Device Motor Control via Crank Mechanism
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Solution Overview
Problem
Existing shutter devices rely on driving springs or electromagnets for blade operation, which can be inefficient and lack flexibility in controlling curtain speed and exposure adjustments.
Innovation Solution
A shutter device employing a leverage crank mechanism with a motor, decelerator, and position detectors to control the blade unit's movement, eliminating the need for driving springs and allowing precise control of curtain speed and exposure adjustments through continuous rotation and deceleration of the crank plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If driving springs or electromagnets are used for blade operation, then the shutter device can maintain shutter state, but the control flexibility for curtain speed and exposure adjustments is limited
Solution Approach 1:
The patent replaces traditional mechanical driving springs and electromagnets with a motor-driven system. The motor provides electrical control that can be precisely adjusted through software, enabling flexible control of curtain speed and exposure adjustments without changing the mechanical structure. This substitution maintains shutter state while dramatically improving control flexibility.
Solution Approach 2:
The patent introduces a decelerator mechanism that allows dynamic adjustment of the motor's rotational speed. By controlling the deceleration ratio, the system can vary the blade unit's movement speed in real-time, providing flexible control over curtain speed and exposure duration. This dynamic control capability is achieved without adding complex mechanical systems.
2Measurement precision
If traditional driving springs are used, then the shutter device structure is simpler, but precise control of curtain speed is difficult to achieve
Solution Approach 1:
The patent incorporates position detectors that monitor the blade unit's position and provide feedback to the control system. This feedback enables precise control of curtain speed by adjusting the motor's operation based on actual blade position, ensuring accurate exposure timing. The feedback mechanism works together with the decelerator to achieve high-precision speed control.
Solution Approach 2:
The patent changes the control parameter from mechanical spring force to electrical motor parameters (speed, torque, duration). By controlling these electrical parameters through software, the system achieves precise curtain speed control. The decelerator further refines this by allowing continuous adjustment of the speed parameter without mechanical complexity.
3Use of energy by moving object
If driving springs are employed, then the shutter device can operate with fewer components, but load on the motor increases and efficiency decreases
Solution Approach 1:
The patent replaces heavy mechanical driving springs with a motor-driven system that uses electrical energy. This substitution reduces the mechanical load on moving components and improves motor efficiency by eliminating the need for spring winding and unwinding mechanisms. The motor can be optimized for electrical efficiency rather than mechanical energy storage and release.
Solution Approach 2:
The patent removes the driving spring component entirely from the system. By extracting this mechanical element, the design reduces the number of moving parts and eliminates the associated load on the motor. The functionality previously provided by the spring is achieved through controlled motor operation, which is more efficient and requires fewer components.
4Reliability
If additional mechanisms like driving springs are added to maintain shutter state, then the shutter can hold state, but the overall device complexity increases
Solution Approach 1:
The patent replaces mechanical state-maintenance mechanisms (driving springs) with an electrical control system. The motor can maintain shutter state through controlled operation, and the position detectors provide feedback to ensure the blade unit remains in the desired state. This electrical approach is more reliable and requires fewer mechanical components.
Solution Approach 2:
The patent implements a self-service control system where the position detectors continuously monitor the blade unit's state and provide feedback to the motor control system. This feedback loop enables the system to automatically maintain shutter state without requiring additional mechanical mechanisms like driving springs. The system serves itself by using sensor feedback to regulate motor operation.
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
Enables precise control of curtain speed and exposure adjustments, reducing load on the motor, improving efficiency, and maintaining the shutter state even when the imaging apparatus is turned off, without the need for driving springs or additional mechanisms.
Implementation Method 1
a motor, a decelerator configured to decelerate power from the motor
Implementation Method 2
a decelerator configured to decelerate power from the motor, a first connector engaged with the decelerator
Implementation Method 3
a first position detector configured to detect passage through a predetermined position in a moving locus of the driving member or the first connector
Data Source
AI summary
A shutter device includes a base plate including an opening, a blade unit configured to switch a state of the opening, a driving member configured to drive the blade unit, a motor, a decelerator configured to decelerate power from the motor, a first connector engaged with the decelerator, a second connector having one end attached to the driving member and another attached to the first connector, a first position detector configured to detect passage through a predetermined position in a moving locus of the driving member or the first connector, and a second position detector configured to detect a relative difference from the first position detector. The blade unit switches the state of the opening from the closed state to the opened state by continuous rotation of the first connector. Driving of the motor is controlled based on results of the detection by the first and second position detectors.