Shutter Device Electromagnetic Locking Mechanism
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Solution Overview
Problem
Conventional shutter devices require a significant force to maintain the biasing force of drive springs, which increases device size and power consumption.
Innovation Solution
The shutter device incorporates a leading and trailing curtain mechanism with a drive spring winding mechanism, a charge mechanism, a lock mechanism, and a biasing mechanism using electromagnetic forces to reduce the force needed to hold the biasing force, allowing for efficient operation with reduced electromagnetic holding force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drive spring is winded up before exposure to generate biasing force and held in a winded-up state, then the shutter device can operate reliably, but the force required to hold the drive spring increases device size and power consumption
Solution Approach 1:
The patent replaces the traditional mechanical holding mechanism (which required significant force to maintain the drive spring in a winded-up state) with an electromagnetic holding mechanism. The electromagnetic hold member uses electromagnetic force to hold the lock member that secures the charge lever, thereby reducing the mechanical holding force required on the drive spring while maintaining reliable shutter operation.
Solution Approach 2:
The patent introduces a biasing mechanism that generates biasing force in the release direction of the lock member. This changes the force balance parameters by providing an assisting force that works together with the electromagnetic holding force, thereby reducing the electromagnetic force required to hold the charge lever in the charged state.
2Duration of action of moving object
If a drive spring is held in a winded-up state until exposure begins, then the shutter is ready for exposure, but device size increases to accommodate the holding mechanism
Solution Approach 1:
The patent replaces bulky mechanical holding mechanisms with a compact electromagnetic holding system. The electromagnetic hold member and associated components occupy less space than traditional mechanical springs and levers required to maintain the drive spring in a winded-up state over extended periods.
Solution Approach 2:
The biasing mechanism changes the force distribution parameters, allowing for a more compact overall design. By generating biasing force in the release direction, the system can use smaller, more compact components while maintaining the same stand-by readiness duration.
3Duration of action of moving object
If a drive spring is held in a winded-up state until exposure begins, then the shutter can be activated on demand, but power consumption increases to maintain the holding force
Solution Approach 1:
The patent replaces continuous mechanical force application (which consumes power to maintain tension in mechanical holding springs) with an electromagnetic holding system that consumes less power. The electromagnetic hold member can maintain the locked state with lower energy input compared to traditional mechanical holding systems.
Solution Approach 2:
The biasing mechanism changes the energy balance by providing passive mechanical biasing force that assists the electromagnetic holding system. This reduces the power consumption of the electromagnetic actuator while maintaining the same stand-by readiness duration, as the biasing mechanism does not require active power input.
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 configuration reduces the electromagnetic force required to hold the charge lever, minimizing device size and power consumption while enabling efficient movement of blades between open and closed positions.
Implementation Method 1
a first leading hold member configured to hold, using electromagnetic force, the leading lock member locking the leading charge member; and a first trailing hold member configured to hold, using electromagnetic force, the trailing lock member locking the trailing charge member
Implementation Method 2
a leading charge member configured to elastically deform the leading drive spring and configured to rotate the leading charge member in a charge direction in which the leading drive spring is elastically deformed to generate biasing force
Implementation Method 3
a leading biasing mechanism configured to generate biasing force for biasing the leading lock member in a release direction in which the leading charge member is unlocked after the leading lock member is held by the first leading hold member
Data Source
AI summary
A shutter device includes a leading drive lever configured to move leading blades to a closed position at which the leading blades cover an opening and to move the leading blades to an open position at which the leading blades open the opening; a leading charge mechanism configured to rotate a leading charge lever in a charge direction to generate biasing force and to rotate, using the biasing force of the leading drive spring, the leading charge lever in a drive direction to rotate the leading drive lever in an opening direction; a leading lock lever configured to lock the leading charge lever having rotated in the charge direction; a leading attractive unit configured to hold, using electromagnetic force, the leading lock lever locking the leading charge lever; and a leading biasing mechanism configured to bias the leading lock lever in a release direction.