Segmented Cassette Shutter Durability and Assembly
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Solution Overview
Problem
Conventional cassette shutters with integral structures suffer from low durability due to repeated bending and damage during opening and closing operations, and have complex assembly processes.
Innovation Solution
A cassette shutter composed of multiple pieces connected by fastening pins and grooves, allowing for relative rotation and easy assembly, which prevents damage and enhances durability by forming a curved shutter for opening and closing the cassette entrance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the shutter is integrally formed, then the structure is simple and assembly is easy, but the bending part is torn and damaged by repeated opening and closing operations leading to low durability
Solution Approach 1:
The shutter is divided into multiple separate pieces (first piece, second piece, third piece) connected by fastening pins. This segmentation allows each piece to move independently during opening and closing operations, preventing stress concentration and tearing at bending parts while maintaining overall structural integrity and durability.
2Ease of manufacture
If the shutter is integrally formed, then manufacturing is simple, but assembly process becomes complex due to the need for precise bending and forming
Solution Approach 1:
The shutter is divided into multiple separate pieces (first piece, second piece, third piece) connected by fastening pins. This segmentation allows each piece to move independently during opening and closing operations, preventing stress concentration and tearing at bending parts while maintaining overall structural integrity and durability.
Solution Approach 2:
The shutter pieces are designed to slide relative to each other along curved guide surfaces during opening and closing operations. This dynamic movement allows the shutter to adapt to the required curved path without rigid bending, reducing stress and improving durability while maintaining manufacturing simplicity.
3Reliability
If the shutter is made as a single integral piece, then material usage is efficient, but the bending part suffers from repeated stress and damage
Solution Approach 1:
The shutter is divided into multiple separate pieces (first piece, second piece, third piece) connected by fastening pins. This segmentation allows each piece to move independently during opening and closing operations, preventing stress concentration and tearing at bending parts while maintaining overall structural integrity and durability.
Solution Approach 2:
The shutter pieces utilize curved guide surfaces that allow flexible sliding movement during opening and closing operations. This flexible movement enables the shutter to follow the required curved path without rigid bending, reducing stress on material and improving durability while maintaining material efficiency.
Data Source
AI summary
An object of the present invention is to provide a cassette shutter in which the durability of a curved shutter for opening and closing a medium entrance of a cassette is improved, and assembly of parts is simple. In the present invention for achieving said objective, a cassette shutter, which is slidably disposed on front and bottom surfaces of a cassette storing a paper medium therein and opens and closes an entrance formed in the front surface of the cassette, is configured to include: a plurality of pieces arranged longitudinally and a fastening pin that passes through and thereby fastens a lower portion of an upper-side piece and an upper portion of a lower-side piece so as to enable relative rotation of the plurality of pieces.