Image Forming Apparatus Cassette Guide Rail Integration
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Solution Overview
Problem
Image forming apparatuses with slide-type attachable/detachable units face challenges due to the need for additional space and increased complexity from dedicated rail guides, leading to larger apparatus sizes and more components.
Innovation Solution
The design incorporates a housing with cassette guides and a unit storage space that uses the gap between side plates and cassette guides to form a guide rail, allowing the image forming unit to slide without requiring a dedicated guide rail in the apparatus main body, thereby reducing size and component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated rail guide is provided in the apparatus main body, then the image forming unit can slide stably, but the apparatus main body becomes larger and the number of components increases
Solution Approach 1:
The patent merges the rail guide function with the side plates by forming guide rails directly on the inner surfaces of the side plates through protrusions. This integration eliminates the need for separate dedicated rail guides, reducing the apparatus main body size while maintaining sliding stability of the image forming unit
Solution Approach 2:
The side plates serve multiple functions: they provide structural support for the apparatus main body and simultaneously function as rail guides for the image forming unit through their protrusions. This multi-functionality reduces the number of components needed while ensuring stable sliding operation
2Reliability
If a dedicated rail guide is provided in the apparatus main body, then the image forming unit can slide stably, but the number of members and working processes increase
Solution Approach 1:
The rail guide function is merged with the side plates by forming protrusions on the inner surfaces of the side plates. This integration reduces the number of separate components (eliminating dedicated rail guides) while maintaining the sliding stability required for image forming unit operation
Solution Approach 2:
The dedicated rail guide component is extracted/removed from the system. Instead, the side plates themselves provide the guiding function through their protrusions, simplifying the overall structure and reducing component count while maintaining functional requirements
Data Source
AI summary
An image forming apparatus includes a housing and a pair of cassette guides. The housing is provided with a cassette storage space and a unit storage space. The unit storage space is disposed above the cassette storage space and configured to slidably support an image forming unit. The housing has a pair of side plates arranged to be opposite to each other in a direction intersecting a sliding direction of the image forming unit. The pair of cassette guides is provided in the cassette storage space and arranged inside the pair of side plate. A guide rail part is formed by a gap between the side plate and the guide cassette arranged inside the side plate, and a top face of the cassette guide. A unit-side rail provided to the image forming unit is slidably engaged with the guide rail part.