Process Cartridge Electrode Layout for Stable Detachment Contact
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Solution Overview
Problem
The existing printer configuration results in significant abrasion and contact failure of electric contact portions due to large displacement during detachment of the development cartridge from the photosensitive member cartridge, particularly near the release lever, leading to instability in electrical connections.
Innovation Solution
The process cartridge design includes a first unit with an image bearing member and a second unit with a developer bearing member, where the second unit is mounted on the first unit in a specific direction, featuring a moving member and a storage unit with an electrode positioned on opposite sides of the cartridge, stabilizing the contact between the memory electrode and the apparatus body electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the development cartridge is made detachable from the photosensitive member cartridge, then ease of operation is improved, but the electric contact portions are abraded and contact failure occurs
Solution Approach 1:
The patent separates the memory unit from the development cartridge and places it on the photosensitive member cartridge. This segmentation allows the development cartridge to be detached for ease of operation while the memory unit remains stationary on the photosensitive member cartridge to maintain reliable electrical contact with the apparatus body.
Solution Approach 2:
The memory unit is extracted from the development cartridge and relocated to the photosensitive member cartridge. This extraction eliminates the problem of electrode abrasion that would occur if the memory unit remained in the detachable development cartridge, while still allowing the development cartridge to be easily detached for refilling or replacement.
2Ease of operation
If the electric contact portions are positioned near the release lever for easy access, then ease of operation is improved, but the displacement amount increases and abrasion occurs
Solution Approach 1:
The memory unit is extracted from the development cartridge and repositioned on the photosensitive member cartridge away from the release lever. This eliminates the displacement and abrasion problem that would occur near the release lever during detachment operations.
Solution Approach 2:
Instead of placing the memory unit near the release lever to facilitate operation, the patent inverts the approach by positioning it on the photosensitive member cartridge where it remains stationary during detachment, ensuring stable electrical contact while maintaining operational ease through the detachable development cartridge design.
Data Source
AI summary
A process cartridge includes a first unit including an image bearing member configured to carry an electrostatic latent image, and a second unit including a developer bearing member configured to develop the electrostatic latent image carried on the image bearing member into a toner image, the second unit being capable of being mounted on the first unit in a mounting direction. The first unit includes a moving member that moves the second unit mounted on the first unit at a mounting position to a detachment position. The second unit includes a storage unit that stores information about the second unit. The moving member is disposed on a first side of the process cartridge in a longitudinal direction of the image bearing member. An electrode of the storage unit is disposed on a second side of the process cartridge in the longitudinal direction.