Universal Drum Cartridge for Integrated and Separate Developing Systems
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Solution Overview
Problem
The existing drum cartridges require separate configurations for integrated and separate type developing cartridges, leading to increased costs due to the need for different designs to accommodate both types for a single image forming apparatus.
Innovation Solution
A drum cartridge design that allows for selective attachment of both integrated and separate type developing devices and cartridges, featuring a photosensitive drum and a drum frame that can switch between states to accommodate either a developing device or a developing cartridge, with a toner cartridge detachably attachable to the developing device in one state and the developing cartridge detachably attachable to the drum frame in another.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the drum cartridge is configured to support both integrated type and separate type developing cartridges, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The drum cartridge is designed with a universal mounting structure that can accommodate both integrated type developing cartridges (where the developing device and toner cartridge are combined) and separate type developing cartridges (where they are separate components). The drum frame includes a mounting portion with positioning protrusions and engagement structures that work with both cartridge types, allowing a single drum cartridge design to serve multiple functions and support different developing cartridge configurations without requiring separate specialized designs for each type.
2Manufacturing precision
If separate configurations are used for integrated and separate type developing cartridges, then the manufacturing precision is maintained, but the manufacturing cost increases
Solution Approach 1:
By designing a universal drum cartridge that supports both integrated and separate type developing cartridges through standardized mounting interfaces, the need to manufacture separate drum cartridge variants is eliminated. This reduces production costs by using common parts, tooling, and assembly processes while maintaining the precision required for both cartridge types through careful design of the mounting portion that ensures proper positioning and engagement for each configuration.
Data Source
AI summary
A drum cartridge, comprising: a photosensitive drum; and a drum frame having a first state where a developing device is attached to the drum frame, the developing device including a developing roller, and a second state where a developing cartridge is detachably attachable to the drum frame, the developing cartridge including a developing roller and a developing frame which stores toner, wherein, in the first state, a toner cartridge is detachably attachable to the developing device.