Process Cartridge Handle Layout for Compact Electrophotographic Design
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Solution Overview
Problem
The existing process cartridges for electrophotographic image forming apparatuses face challenges in reducing size in the upper-lower direction due to the overlapping handles of the drum and developing cartridges, which hinders the creation of a thinner body design while maintaining accessibility to the developing cartridge.
Innovation Solution
The design includes an image carrying member cartridge with a first handle and a developing cartridge with a second handle positioned to ensure the second handle is spaced apart from the first handle, allowing for reduced size in the upper-lower direction while maintaining accessibility, by configuring the handles to minimize overlap and optimize space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the handles of the drum cartridge and developing cartridge are positioned overlapping each other, then the structure is simplified, but the size in the upper-lower direction increases due to the total thickness of overlapping handles
Solution Approach 1:
The patent repositions the handles from an overlapping vertical arrangement to a side-by-side horizontal arrangement. The first handle is positioned at the front end of the drum cartridge while the second handle is positioned at the side end of the developing cartridge, changing the spatial dimension from vertical stacking to horizontal placement. This dimensional change eliminates the thickness accumulation problem while maintaining structural simplicity.
2Length of stationary object
If the handles are positioned to minimize overlap for reducing size, then the thickness is reduced, but accessibility to the developing cartridge may be compromised
Solution Approach 1:
By placing the second handle at the side end of the developing cartridge rather than overlapping it with the first handle, the patent creates a lateral extension that maintains accessibility. The side positioning allows operators to access the developing cartridge handle from the side direction, ensuring ease of operation while keeping the overall thickness minimal.
Solution Approach 2:
The patent applies different spatial positioning strategies to different handles: the first handle is positioned at the front end for drum cartridge operations, while the second handle is positioned at the side end for developing cartridge operations. This localized differentiation optimizes both accessibility and compactness by assigning specific spatial zones to each handle based on operational requirements.
Data Source
AI summary
A process cartridge includes an image carrying member cartridge and a developing cartridge. The image carrying member cartridge includes a first handle. The developing cartridge includes a second handle. In a state where the developing cartridge is attached to the image carrying member cartridge, a one edge of the first handle is located at substantially the same position as a one edge of the second handle in a direction, and the second handle is spaced apart from the first handle.