Cartridge Drawer Stability via Two-Dimensional Movement
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Solution Overview
Problem
Image forming apparatuses with cartridge drawers become unstable when the drawer is moved outward for cartridge replacement, as the center of gravity shifts, and existing solutions complicate the structure with additional sub-structures to mitigate this issue.
Innovation Solution
The design includes a supporting member that moves between inside and outside positions, with the cartridge mounted or dismounted above it, where the supporting member's upstream end remains inside the apparatus and the downstream end is positioned lower when outside, maintaining stability without requiring a sub-structure for the control panel retraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cartridge drawer is moved outward for cartridge replacement, then cartridge accessibility is improved, but the center of gravity shifts making the apparatus unstable
Solution Approach 1:
The drawer is designed to move not only horizontally outward but also vertically downward when in the outside position. This two-dimensional movement (horizontal + vertical) allows the drawer to extend outward for cartridge accessibility while the downstream portion lowering maintains the center of gravity within acceptable limits, preventing excessive tilting and maintaining apparatus stability.
2Stability of the object's composition
If the control panel is made retractable to minimize drawer exposure, then apparatus stability is improved, but the structure becomes complicated
Solution Approach 1:
The invention extracts the control panel retraction function entirely from the system. Instead of making the control panel retractable to compensate for drawer movement, the solution directly addresses the stability issue by designing the drawer's downstream portion to lower when moved outward. This eliminates the need for complex control panel retraction mechanisms while maintaining apparatus stability.
Data Source
AI summary
An image forming apparatus includes a cartridge including a rotatable photosensitive drum or a rotatable developing sleeve; and a supporting member for detachably supporting the cartridge, the supporting member and being movable between an inside position for permitting mounting of the cartridge to the apparatus and an outside position in direction along an axial direction of the drum or the sleeve. The cartridge is mountable to the supporting member from above. When the supporting member is in the outside position with the cartridge mounted thereon, an upstream end of the supporting member with respect to a moving direction from the inside position toward the outside position is inside the forming apparatus. When the supporting member is in the outside position, a downstream portion thereof is lower than that when the supporting member is in the inside position.