Blade Driving Device Motor Orientation for Compact Shutter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing shutter mechanisms in cameras, particularly in mirrorless cameras, face challenges in size reduction as they require higher motor outputs for continuous shooting, and existing designs are not efficient in minimizing space in both the optical axis and perpendicular directions.
Innovation Solution
A blade driving device with a base plate, blades, a drive mechanism, and a charge mechanism where the charge mechanism includes a slide member that linearly reciprocates to perform a charge operation on the drive mechanism, allowing for a compact design by optimizing the placement of the motor and drive components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor output is increased for continuous shooting, then the shooting performance is improved, but the motor size increases
Solution Approach 1:
The patent changes the motor shaft orientation from parallel to perpendicular relative to the blade running direction. This dimensional reorientation allows the motor to be positioned above the base plate, utilizing vertical space rather than horizontal space, thereby reducing the shutter's footprint in the optical axis direction while accommodating higher output motors
2Area of stationary object
If the shutter size is reduced in the direction perpendicular to the optical axis, then the camera compactness is improved, but the space for installing setting members is insufficient
Solution Approach 1:
By orienting the motor shaft perpendicular to the blade running direction and positioning the motor above the base plate, the patent utilizes the vertical dimension (optical axis direction) to accommodate setting members and their rotation space. This allows the shutter to be compact in the perpendicular direction while providing sufficient space for mechanisms in the vertical direction
Solution Approach 2:
The charge mechanism is configured to perform charge operations within the space above the base plate, nesting the charging function within the vertical space rather than requiring additional horizontal space. The slide member moves linearly in the vertical direction, utilizing the motor's rotational space efficiently
3Length of stationary object
If the motor shaft direction is parallel to the blade running direction, then the shutter size in the optical axis direction is reduced, but the shutter size in the perpendicular direction cannot be reduced
Solution Approach 1:
The patent inverts the conventional motor orientation by placing the motor shaft perpendicular to the blade running direction instead of parallel. This inversion repositions the motor above the base plate, fundamentally changing the spatial arrangement to achieve compactness in the perpendicular direction while maintaining optical axis thickness
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
The solution enables a compact shutter design suitable for mirrorless cameras, reducing size while maintaining high performance by efficiently utilizing space and allowing for higher motor outputs within a smaller form factor.
Implementation Method 1
a drive mechanism including a drive spring and actuates the blade
Implementation Method 2
the motor generating a driving force for the charge mechanism
Data Source
AI summary
A blade driving device including, a base plate including an opening through which light passes, a blade configured to runs on a surface of the base plate to open and close the opening, a drive mechanism including a drive spring and actuates the blade; and a charge mechanism configured to perform a charge operation on the drive mechanism against the drive spring. The charge mechanism includes a slide member configured to linearly reciprocate in a direction parallel to the base plate along a motor between the motor and the drive mechanism, the motor generating a driving force for the charge mechanism.