Grooved Liquid Retainer for Image Forming Apparatus
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Solution Overview
Problem
Conventional image forming apparatuses face the issue of liquid entering the internal casing due to gaps between the cover and top cover, potentially damaging internal components.
Innovation Solution
The apparatus incorporates a grooved portion below the boundary between the cover edges, which traps and directs liquid away from internal components, preventing entry into the casing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access cover edge is aligned with the top cover edge to close the opening, then the sealing appearance is improved, but liquid can enter through the boundary gap between the cover edges
Solution Approach 1:
The groove structure acts as an intermediary element between the access cover and top cover. It provides a dedicated pathway that intercepts liquid before it can reach the internal space, while still allowing the cover edges to maintain their aligned sealing position. The groove serves as a mediating structure that handles the liquid protection function separately from the sealing function.
Solution Approach 2:
The boundary region between the access cover and top cover is segmented into two functional zones: the sealed boundary interface where edges align, and the groove structure that runs parallel to this boundary. This segmentation allows the sealing function and liquid protection function to be independently optimized without interfering with each other.
2Object-affected harmful factors
If a groove structure is added below the boundary to prevent liquid entry, then liquid protection is improved, but the device structure becomes more complex
Solution Approach 1:
The groove structure is designed to serve multiple functions simultaneously: it acts as a liquid retention channel, provides structural reinforcement to the boundary region, and maintains the alignment relationship between the access cover and top cover. By consolidating these functions into a single structure, the overall device complexity is minimized while achieving comprehensive liquid protection.
Solution Approach 2:
The groove structure is merged with the existing boundary region between the access cover and top cover, rather than being added as a separate component. This integration allows the liquid protection function to be incorporated into the existing structural framework, avoiding the need for additional independent parts and reducing overall complexity.
Data Source
AI summary
An image forming apparatus includes: a casing including a base frame, a top cover, and an access cover; a grooved portion; and a cartridge. The top cover is provided at the base frame and has a first edge. The access cover is provided at the base frame and pivotally movable between an open position and a closed position. The access cover has an upper region providing a second edge. The second edge is positioned along the first edge when the access cover is at the closed position. The upper region of the access cover at the closed position and the top cover defines a boundary therebetween. The grooved portion has a groove positioned below the first edge and a second edge. The cartridge is attached to and detached from the casing and positioned below the boundary and the grooved portion.