Image Forming Apparatus Drum Unit Segmentation
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Solution Overview
Problem
Conventional image forming apparatuses require replacing the entire drawer when replacing the first and second photosensitive drums, which is inconvenient.
Innovation Solution
The image forming apparatus includes a drum unit with a waste toner pipe and positioning plates that allow the photosensitive drums to be replaced independently, reducing the need to replace the entire drawer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the entire drawer is replaced when replacing photosensitive drums, then the photosensitive drums can be replaced, but the replacement process becomes complex and time-consuming
Solution Approach 1:
The drawer assembly is segmented into two independent replaceable units: the drawer body and the drum unit. The drum unit contains the first and second photosensitive drums along with the waste toner pipe, while the drawer body remains stationary. This segmentation allows the drum unit to be replaced independently without replacing the entire drawer, simplifying the replacement process and reducing time requirements.
2Ease of repair
If the drum unit is detachable from the drawer, then maintenance becomes easier, but the structural complexity of the drawer increases
Solution Approach 1:
The waste toner pipe is pre-connected to the drum unit before the drum unit is attached to the drawer. The positioning plate on the drawer is designed with positioning protrusions that align with corresponding recesses on the drum unit, ensuring proper alignment and connection of the waste toner pipe and other components before final attachment. This preliminary arrangement of components simplifies the overall structure while enabling easy maintenance.
Data Source
AI summary
An image forming apparatus includes a main housing, a drawer, and a drum unit. The drawer is movable between an accommodated position at which the drawer is accommodated in the main housing and a pulled-out position at which the drawer is pulled out from the main housing. The drum unit is attachable to the drawer in a state where the drawer is located at the pulled-out position. The drum unit includes a first photosensitive drum, a second photosensitive drum, and a waste toner pipe allowing passage of waste toner from the first photosensitive drum and waste toner from the second photosensitive drum.