Focal Plane Shutter Shock Absorber Mounting Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Focal plane shutters face design constraints due to protrusions from shock absorbing members, leading to interference with other components and reduced durability from sliding contact and wear, affecting the stability and operation of shutter blades.
Innovation Solution
A focal plane shutter design with a shutter base plate featuring overhang sections on both surfaces of the slot, where the shock absorbing member is held between them, preventing protrusion and enhancing durability by reducing sliding contact and wear, using synthetic resin materials and configuring concave sections to stabilize the shock absorbing member's mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shock absorbing member is made with overhang sections protruding from the shutter base plate, then the shock absorbing function is achieved, but the design freedom is constrained due to interference with other components
Solution Approach 1:
The invention transitions from a two-dimensional planar shock absorbing member to a three-dimensional structure by adding a third overhang section that protrudes in the direction of the slot. This dimensional change allows the shock absorbing member to perform its function while avoiding interference with other components in the blade chamber, thus resolving the contradiction between shock absorbing reliability and design freedom.
2Adaptability or versatility
If the thickness of the shutter base plate is reduced to prevent protrusion, then design freedom is improved, but the durability of the shock absorbing member deteriorates due to sliding contact and wear
Solution Approach 1:
The shock absorbing member is segmented into multiple functional sections: a first overhang section for shock absorption, a second overhang section for mounting, and a third overhang section that protrudes to prevent sliding contact. This segmentation allows each part to perform its specific function independently, improving durability while maintaining design freedom.
3Ease of manufacture
If the shock absorbing member is compressed and deformed for mounting, then the mounting is achieved, but the overhang sections become thin and prone to deformation, reducing durability
Solution Approach 1:
The shock absorbing member exhibits local quality variations with different thicknesses in different sections. The first overhang section has sufficient thickness for shock absorption, the second section is thinner for easy mounting, and the third section provides structural support. This local quality distribution allows easy mounting while preventing overall thinning and deformation.
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 increases design freedom for shutter components, improves the durability of the shock absorbing member, and maintains the shock absorbing function without compromising the shutter's operation, eliminating the need for thickness adjustments and reducing wear.
Implementation Method 1
the shock absorbing member is compressed and deformed in its entirety and is admitted to the slot. The shock absorbing member is restored to its original shape at one end of the slot in a longitudinal direction
Data Source
AI summary
A shutter base plate is made of synthetic resin and is configured with one overhang section on the blade-chamber-side surface at one end of an arcuate slot and the other overhang section on the blade-chamber-outside surface. A shock absorbing member made from elastic material is configured with concave portions on the blade-chamber-side surface and three concave portions on the blade-chamber-outside surface. The shock absorbing member is mounted to the shutter base plate in such a way that these concave portions come in contact with the overhang sections, and as is well known, when an exposure operation is completed, the driving pin of a driving member abuts on the shock absorbing member.