Telescopic Sheet Cassette with Integrated Regulating Member
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Solution Overview
Problem
Conventional sheet cassettes in image forming apparatuses require users to perform two separate operations to change the size of the sheet storage, which complicates usability and reduces space efficiency when the apparatus is used with sheets of different sizes.
Innovation Solution
A sheet feeding device with a sheet cassette that includes a first and second cassette portion, where the second portion is slidably connected to change the size of the sheet storage, and a fixed portion that releases to allow the cassette to be shortened or extended, enabling single-operation adjustment of the rear end regulating member for different sheet sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a telescopic sheet cassette with a slide cassette is used to adjust sheet storage size, then the adaptability to different sheet sizes is improved, but the device complexity increases due to the need for separate fixed portions and sliding mechanisms
Solution Approach 1:
The patent combines the rear end regulating member with the slide cassette into a single integrated component. The rear end regulating member is provided on the slide cassette and moves together with it, eliminating the need for separate adjustment mechanisms. This merging reduces device complexity while maintaining the ability to adapt to different sheet sizes through the sliding action.
Solution Approach 2:
The slide cassette is designed to serve multiple functions: it acts as both the sheet storage container and the rear end regulating mechanism. By providing the rear end regulating member on the slide cassette, the same component performs both sheet retention and size adjustment functions, reducing the overall number of parts needed in the system.
2Adaptability or versatility
If the slide cassette is drawn out or stored to change sheet size, then the adaptability is improved, but the loss of time increases due to requiring separate operations for cassette adjustment and rear end regulation
Solution Approach 1:
The rear end regulating member is integrated with the slide cassette so that they move as a single unit. When the user draws out or stores the slide cassette to adjust sheet size, the rear end regulating member automatically adjusts to the correct position without requiring a separate operation. This merging of functions eliminates the time loss associated with separate adjustment steps.
Solution Approach 2:
The rear end regulating member is pre-positioned on the slide cassette at locations corresponding to different sheet sizes. As the slide cassette is drawn out or stored to a specific position, the rear end regulating member is automatically positioned in advance to regulate the rear end of sheets at the appropriate location, eliminating the need for subsequent manual adjustment.
Data Source
AI summary
A slide cassette is slidably provided in a main cassette of a sheet cassette. When a sheet with a size larger than that of a sheet which may be stored in the main cassette is stored, the slide cassette is sled and moved to extend the sheet cassette. There is provided a fixing portion which may fix the slide cassette and the main cassette in a state in which the sheet cassette is in a shortened or an extended state by sliding the slide cassette. The fixing portion releases the fixing by an operation in which the slide cassette is sled in a shortening direction or extending direction.