Detachable Positioning Member for Process Cartridge Maintenance
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Solution Overview
Problem
Conventional process cartridges require time and effort for maintenance and replacement of developer bearers due to the need to remove and separate positioning members from the image bearer and developing device.
Innovation Solution
A positioning member with a fitting portion, groove, and restricting member that allows the shaft portion of the second rotating body to be slidably movable in the groove, reducing the effort required for maintenance and replacement by enabling easy attachment and detachment of the developing device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the positioning member is securely fixed to the process cartridge using multiple screws, then the facing distance accuracy between the developing roller and photoconductor drum is maintained, but the time and effort required for maintenance and replacement of the developer bearer increases
Solution Approach 1:
The positioning member is divided into a main body portion and a detachable restricting member. The restricting member can be separately removed from the groove in the main body portion, allowing the developing device to be detached without removing the entire positioning member or disturbing the photoconductor drum. This segmentation enables maintenance while preserving positioning accuracy.
Solution Approach 2:
The restricting member is designed to be movable within the groove, transitioning between a fixed position that maintains positioning accuracy and a removable position that enables easy detachment of the developing device. This dynamic design allows the system to switch between stability and ease of maintenance based on operational needs.
2Ease of operation
If the positioning member is removed completely for developer bearer replacement, then access to the developing device is improved, but the photoconductor drum must be separated from the positioning member which increases complexity and time
Solution Approach 1:
The positioning member is segmented into a main body portion that remains fixed to the process cartridge and a detachable restricting member. This allows the restricting member to be removed independently to access the developing device, while the main body portion with the photoconductor drum remains in place, reducing disassembly complexity.
Solution Approach 2:
The restricting member is extracted as a separate detachable component from the positioning member. This extracted component can be removed independently to provide access to the developing device for maintenance, while the core positioning structure remains intact and connected to the photoconductor drum.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6B
AI summary
A positioning member (40) defines a facing distance between a first rotating body (11) and a second rotating body (13a). The positioning member includes a fitting portion (40a), a groove (40b), and a restricting member (41, 45, 46). A fitted portion (11a) of the first rotating body is to be rotatably fitted into the fitting portion. The groove has a groove shape extending in a predetermined direction from an opening to an abutting portion. A shaft portion (13a10) of the second rotating body is to be slidably movable in the groove. The restricting member restricts movement of the shaft portion in the predetermined direction in a state in which the shaft portion abuts on the abutting portion in the groove. The restricting member is detachably disposed on the groove.