Sheet Feeding Device Dual Cover Angles Visibility
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Solution Overview
Problem
The existing sheet feeding devices in image forming apparatuses with multiple levels of sheet cassettes obstruct the operator's line of sight when trying to diagnose sheet jams, as the opening angles of the covers hinder visibility of the feeding paths.
Innovation Solution
The design incorporates a sheet feeding device with two covers that open differently, where the upper cover opens at a smaller angle than the lower cover, ensuring that neither blocks the operator's view when both are open, allowing for improved visibility of the feeding paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If multiple opening/closing covers are disposed to expose the sheet feeding path, then the sheet feeding path can be accessed for sheet removal, but the line of sight is obstructed when both covers are open
Solution Approach 1:
The patent applies dynamics by making the opening angle of the upper cover variable rather than fixed. The control unit dynamically adjusts the opening angle based on the operational state (e.g., whether the lower cover is open) to optimize both accessibility and visibility. This resolves the contradiction by allowing the system to adapt its configuration rather than being constrained by a static design.
Solution Approach 2:
The patent changes the parameter of the upper cover's opening angle to resolve the contradiction. By controlling the opening angle within a specific range (0° to a predetermined angle less than 180°), the system can adjust the position of the upper cover to prevent obstruction of the line of sight while maintaining accessibility for sheet removal.
2Ease of operation
If the upper cover is opened at a large angle to expose the feeding path, then accessibility is improved, but the upper cover obstructs the operator's view of the lower feeding path
Solution Approach 1:
The system dynamically adjusts the upper cover's opening angle based on the lower cover's state. When the lower cover is open, the control unit restricts the upper cover's opening angle to prevent obstruction, creating a dynamic coordination between the two covers that adapts to operational needs.
Solution Approach 2:
The control unit receives feedback about the operational state (e.g., whether the lower cover is open) and adjusts the upper cover's opening angle accordingly. This feedback mechanism ensures that the upper cover does not obstruct the view when the lower cover is in use, resolving the line of sight obstruction problem.
3Adaptability or versatility
If both covers are opened simultaneously to access different feeding paths, then comprehensive access is achieved, but visibility of the lower path is blocked
Solution Approach 1:
The system implements dynamic coordination between the two covers through the control unit. When both covers need to be open for comprehensive access, the control unit adjusts the upper cover's opening angle to a restricted range that prevents obstruction while maintaining accessibility to both feeding paths.
Solution Approach 2:
The control unit changes the parameter of the upper cover's opening angle to a specific range (0° to predetermined angle) when the lower cover is open, allowing both covers to be simultaneously accessible without compromising visibility of the lower feeding path.
Data Source
AI summary
The sheet feeding device includes a housing, first and second feeding paths, and first and second covers. The first feeding path extends in a vertical direction within the housing. The second feeding path extends in the vertical direction within the housing, and a lower end thereof is connected to an upper end of the first feeding path. The first cover exposes, in an open state, the first feeding path outside of the housing. The second cover exposes, in an open state, the second feeding path outside of the housing. When both the first cover and the second cover are opened, the first cover and the second cover are respectively in the open state relative to the housing in a mode where a second opening angle of the second cover relative to the housing is smaller than a first opening angle of the first cover relative to the housing.