Side Member Design for Compact Process Cartridge Assembly
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Solution Overview
Problem
There is a need for image forming apparatuses and cartridges that are compact in size, have fewer components, and are cost-effective, particularly in limited spaces where traditional electrophotographic systems require separate components for image formation.
Innovation Solution
The design integrates functions into a single component by using a process cartridge with an image bearing unit, development unit, and a cover member on both sides of the photosensitive drum, including a drive-side and nondrive-side cover member to connect these units, allowing for remountable and efficient operation within a compact image forming apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If traditional electrophotographic systems use separate components for image formation, then image quality and reliability are maintained, but apparatus size and component count increase
Solution Approach 1:
The patent combines the photosensitive drum, developing unit, and cleaning unit into a single integrated process cartridge assembly. The side member serves as a common support structure that houses all these components, eliminating the need for separate mounting of individual units and reducing overall apparatus size while maintaining functional integrity
Solution Approach 2:
The side member is designed as a multi-functional component that simultaneously serves as the support structure for the photosensitive drum, the developing unit, and the cleaning unit. This universal support structure replaces multiple separate mounting structures, reducing component count while providing all necessary mounting functions
2Ease of manufacture
If functions are integrated into one component, then apparatus size and component count are reduced, but manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The integrated process cartridge is designed as a separable module that can be easily removed and replaced as a complete unit. This segmentation allows the complex integrated assembly to be manufactured and tested independently, then installed as a single module, simplifying the overall manufacturing process and reducing assembly complexity in the main apparatus
Solution Approach 2:
The side member acts as an intermediary structure that standardizes the mounting interfaces for the photosensitive drum, developing unit, and cleaning unit. By providing uniform mounting holes and support structures, it simplifies the assembly process and enables standardized manufacturing procedures
3Volume of moving object
If separate components are used for photosensitive drum, developing unit, and cleaning unit, then ease of replacement is maintained, but apparatus size increases
Solution Approach 1:
The process cartridge is designed with dynamic replaceability - the entire integrated assembly can be quickly removed and replaced as a single unit, while internal components remain fixed relative to each other. This dynamic design allows rapid replacement without requiring disassembly of individual components, maintaining ease of operation while reducing apparatus size
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A nondrive-side cover member is arranged to form a part of a process cartridge and includes a frame portion, and a regulation frame portion provided in the frame portion, to regulate movement of the cartridge. The frame portion has a hole provided to expose an electric contact. Further, a drive-side cover member is arranged to form a part of a process cartridge and includes a frame portion having a first hole and a second hole with a diameter larger than the diameter of the first hole, and a slit portion arranged to receive a memory device, for storing information.