Drum Cartridge Cover Rotation via Contact Portions
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Solution Overview
Problem
Existing image forming apparatuses face complexity in moving a cover from a covering position to an exposing position during drum cartridge mounting, requiring intricate mechanisms that complicate the process.
Innovation Solution
The image forming apparatus incorporates a guide system within the main casing to guide the drum cartridge through specific positions, utilizing contact portions and rotational shafts to seamlessly move the first cover from a covering to an exposing position, simplifying the mounting operation with a reduced number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional mounting mechanism is used to move the cover from covering position to exposing position, then the cover can be moved, but the device complexity increases and the mounting operation becomes more complex
Solution Approach 1:
The patent combines the cover moving function with the drum cartridge mounting movement. The cover is coupled to the drum cartridge such that the single act of mounting the drum cartridge into the main casing simultaneously moves the cover from its initial covering position to the exposing position. This eliminates the need for separate mechanisms to move the cover, thereby reducing device complexity while maintaining ease of operation.
Solution Approach 2:
The cover moves automatically through its own coupling to the drum cartridge during the mounting process. The mounting operation itself provides the motion needed to position the cover correctly, without requiring additional actuators, motors, or control systems. The system serves itself by using the inherent movement of drum cartridge insertion to drive the cover positioning.
2Manufacturing precision
If a guide system with multiple contact portions is used to control cover movement, then the cover positioning precision is improved, but the device complexity increases
Solution Approach 1:
The guide system is segmented into multiple discrete contact portions (first contact portion, second contact portion, third contact portion, fourth contact portion) distributed along the mounting path. Each contact portion interacts with its corresponding contact portion on the drum cartridge at a specific location to provide localized guidance and control. This segmentation allows precise control of cover positioning through simple geometric features rather than complex continuous guidance mechanisms.
Solution Approach 2:
The contact portions serve as intermediary elements between the main casing and the drum cartridge. These simple geometric contact points mediate the interaction, translating the mounting movement into precise cover positioning. Instead of using complex mechanical linkages or control systems, the patent uses these intermediary contact portions to guide and control the motion, achieving high positioning precision with minimal complexity.
Data Source
AI summary
A third contact portion contacts a first contact portion when a drum cartridge moves from first to second guide position. A fourth contact portion contacts a second contact portion when the drum cartridge moves from second to third guide position. When the drum cartridge moves from the first guide position to the second guide position, due to contact of the first contact portion with the third contact portion, the first cover located at the first position rotationally moves in a same rotational direction as the particular rotational direction to be located at the second position. When the drum cartridge moves from the second guide position to the third guide position, due to contact of the second contact portion with the fourth contact portion, the drum cartridge moves from the second guide position to the third guide position in a state where the first cover is kept at the second position.