Process Cartridge Development Unit Rotation Axis Positioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional process cartridges experience instability in the development unit during removal of the sealing member, leading to difficulties in proper removal both when the cartridge is outside and inside the image forming apparatus.
Innovation Solution
A process cartridge design where the development unit is stabilized through a structural arrangement that allows rotational movement relative to the drum unit, with the rotation axis positioned within the width of the sealing member, enabling secure removal of the sealing member without compromising the cartridge's stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the development unit is made rotatable relative to the drum unit, then the sealing member can be removed more easily, but the development unit becomes unstable during removal operation
Solution Approach 1:
The rotation axis of the development unit is positioned within the width of the sealing member, changing the spatial dimension of the rotational movement. This dimensional arrangement ensures that during sealing member removal, the development unit rotates in a controlled manner around an axis that passes through the sealing member's width, preventing instability while enabling easy removal.
2Ease of operation
If the sealing member removal slot is provided in the end wall, then the sealing member can be pulled out, but the development unit attitude changes uncontrollably
Solution Approach 1:
The rotation axis acts as an intermediary element that mediates between the sealing member removal operation and the development unit's rotational movement. By positioning the rotation axis within the sealing member's width, the system controls the development unit's attitude change during removal, preventing uncontrollable position changes while still allowing the sealing member to be pulled out through the slot in the end wall.
Data Source
AI summary
A process cartridge detachably mountable to a main assembly of an electrophotographic image forming apparatus, includes a drum unit having an electrophotographic photosensitive drum; and a developing unit rotatably connected with the drum unit at a center of rotation. The developing unit includes a developing roller for developing an electrostatic latent image formed on the electrophotographic photosensitive drum with a developer, a developer accommodating portion accommodating the developer, and a supply opening, extending in an axial direction of the developing roller, for supplying the developer to the developing roller from the developer accommodating portion. The rotation axis is within a width of the sealing member as seen in a direction perpendicular to a surface of the sealing member.