Process Cartridge Separable Housing for Developing Roller Protection
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Solution Overview
Problem
In image forming apparatuses, prolonged pressure attachment of the developing roller to the image carrier body using OPC can cause chemical damage and permanent deformation, necessitating a mechanism to separate and protect these components during shipping and maintenance.
Innovation Solution
A process cartridge design with a separable housing that allows the developing roller to be attached and detached from the image carrier body using a pressing force, which is released when the toner cartridge is removed, preventing damage and facilitating easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the developing roller is continuously pressure attached to the image carrier body, then the image forming operation can be performed, but chemical damage to the OPC and permanent deformation of the developing roller may occur
Solution Approach 1:
The developing roller is designed to be movable relative to the image carrier body, allowing it to dynamically switch between contact and separation states. During image forming, the roller contacts the image carrier body for development. During shipping or maintenance, the roller can be separated by removing the toner cartridge, which releases the pressing force. This dynamic configuration enables the system to adapt between operational and protective states, preventing chemical damage and permanent deformation while maintaining productivity during actual use.
2Object-affected harmful factors
If the developing roller and image carrier body are separated during shipping, then damage prevention is achieved, but the structure becomes more complex requiring a separable housing mechanism
Solution Approach 1:
The toner cartridge serves multiple functions: it supplies toner to the developing roller during operation and simultaneously acts as a protective mechanism by being removable to release the pressing force between the developing roller and image carrier body. This multi-functionality eliminates the need for separate protective structures or complex separation mechanisms, reducing device complexity while still achieving damage prevention during shipping and maintenance.
3Reliability
If a pressing force mechanism is used to attach the developing roller to the image carrier body, then proper contact for development is achieved, but the mechanism requires additional components such as springs
Solution Approach 1:
The pressing force mechanism is extracted and integrated into the toner cartridge assembly rather than being a separate component. The toner cartridge itself, through its installation and removal, controls the pressing force application. When installed, the toner cartridge provides the necessary pressing force for reliable contact during development. When removed, it releases the pressing force for protection. This extraction approach simplifies the overall structure by combining the pressing mechanism with the existing toner cartridge function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design prevents chemical damage to the OPC and developing roller deformation, improves operational safety, and simplifies maintenance by allowing the pressure attachment to be released during shipping and replacement of the toner cartridge.
Implementation Method 1
pressure attachment of a developing means such as a developing roller to an image carrier body that uses and OPC (organic photoconductor), etc. is performed using a spring, etc.
Data Source
AI summary
An image forming apparatus is provided which can be switched between states in which a developing roller is attached to an image carrier body by applying a pressing force to a developing cartridge and a state in which the developing roller can be released from attachment from the image carrier body. When an operation part of a toner cartridge is arranged at an installation position a pressing force can be applied to a developing cartridge by protruding parts fitting with spring parts, and a developing roller can be attached to a photoconductor drum by the applied pressure. When the operation part is arranged at a removal position, the fitting can be undone, causing the applied pressure to be released.