Image-Forming Charging Member Cleaning with Periodic Contact
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Solution Overview
Problem
The formation of a layer of adhered deposit on a charging member occurs when a removing member that rotates while in contact with the charging member fails to effectively remove the adhered deposit, leading to increased volume resistivity and density unevenness in the output image.
Innovation Solution
A charging system with a removing member that rotates in contact with the charging member only during a predetermined removal time, controlled by a processor to move to a separation position when not in use, thereby minimizing the formation of a deposit layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the removing member rotates while in contact with the charging member at all times, then the adhered deposit is continuously removed, but a layer of adhered deposit is formed on the charging member due to pressing
Solution Approach 1:
The removing member alternates between contact and separation positions in periodic cycles. During contact position, it removes adhered deposits from the charging member. During separation position, it prevents deposit layer formation by not pressing against the charging member. This periodic action resolves the contradiction between continuous deposit removal and preventing deposit layer formation.
2Reliability
If the removing member is in contact with the charging member continuously, then deposit removal is maintained, but the charging member surface is damaged by continuous pressing
Solution Approach 1:
The system implements periodic contact between the removing member and charging member rather than continuous contact. The removing member moves to the contact position only during designated removal periods, then returns to the separation position. This periodic action maintains deposit removal effectiveness while allowing the charging member surface to recover, preventing surface damage from continuous pressing.
3Productivity
If the removing member rotates while following the charging member, then deposit removal is effective, but the structure becomes complex with continuous contact mechanism
Solution Approach 1:
The removing member's contact state with the charging member is made dynamic rather than static. The moving member enables the removing member to transition between contact and separation positions based on operational requirements. This dynamic configuration maintains high deposit removal efficiency when needed while simplifying the overall structure by eliminating the need for complex continuous contact mechanisms.
Data Source
AI summary
A charging system includes a charging member that rotates while following a rotating image holding body and that charges the image holding body, a removing member that rotates while following the rotating charging member in a state of being arranged at a contact position in contact with the charging member and that removes an adhered deposit adhered to the charging member, a moving member that moves the removing member to a separation position separated from the charging member and the contact position, and at least one processor, in which the processor is configured to cause the removing member to remove the adhered deposit adhered to the charging member only for a removal time by controlling the moving member to move the removing member arranged at the separation position to the contact position at a time determined in advance.