Shutter Unit Motor Drives Charging Members
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Solution Overview
Problem
Conventional shutter units for image pickup apparatuses require a dedicated motor to change between normally open and normally closed methods, increasing costs.
Innovation Solution
A shutter unit design that includes a base plate, blade members, driving members, charging members, and a motor, where the motor supplies driving force to the charging members to move the driving members against biasing forces, allowing the shutter unit to change between operation methods without a dedicated actuator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dedicated motor is used to change between normally open and normally closed methods, then the shutter unit can switch operation methods, but the cost increases
Solution Approach 1:
The motor is designed to perform multiple functions: it drives the first charging member to move the first driving member against the first biasing force, and also drives the second charging member to move the second driving member against the second biasing force. This multi-functionality eliminates the need for a dedicated actuator, reducing cost while maintaining the ability to switch between normally open and normally closed operation methods.
2Adaptability or versatility
If a dedicated actuator is included to change between normally open and normally closed methods, then the shutter unit can switch operation methods, but the device complexity increases
Solution Approach 1:
The patent merges the function of the dedicated actuator with the existing motor by making the motor drive both charging members. The motor is connected to the first charging member and the second charging member through transmission mechanisms, combining what would have been separate actuator functions into a single motor unit, thereby reducing structural complexity.
Solution Approach 2:
The motor is designed to perform multiple functions: it drives the first charging member to move the first driving member against the first biasing force, and also drives the second charging member to move the second driving member against the second biasing force. This multi-functionality eliminates the need for a dedicated actuator, reducing cost while maintaining the ability to switch between normally open and normally closed operation methods.
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 cost-effective switching between normally open and normally closed methods without the need for a dedicated actuator, reducing the overall cost and complexity of the shutter unit.
Implementation Method 1
a motor configured to supply a driving force to the first charging member and the second charging member
Data Source
AI summary
A shutter unit includes a base plate having an opening, a first blade member movable between a closed state and a retracted state, a first driving member biased by a first biasing member, a second driving member biased by a second biasing member, a first charging member configured to cause the first driving member to move in the second direction against a biasing force, a second charging member configured to cause the second driving member to move in the first direction against a biasing force, and a motor configured to supply a driving force to the first and second charging members. In a case where the first charging member causes the first driving member to move, the motor rotates in a direction opposite to a rotation direction in a case where the second charging member causes the second driving member to move.