Developing Cartridge Coupling and Roller Layout for Compact Detection
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Solution Overview
Problem
Existing electrophotographic printers face challenges in reducing the size of developing cartridges while maintaining effective new-product detection mechanisms.
Innovation Solution
The cartridge design incorporates a housing with a coupling member, detection body, rotating member, first and second driving force transmission members, and a new-product detection gear system that allows for compact size without compromising detection functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a detection gear and input gear are mounted on the same side wall of the developing cartridge, then the detection functionality is maintained, but the cartridge size increases
Solution Approach 1:
The patent relocates the detection gear from the side wall to the end surface of the developing cartridge, utilizing a different spatial dimension for component arrangement. This dimensional change allows the detection gear and input gear to be positioned on opposite ends of the cartridge, reducing the overall cartridge volume while maintaining detection functionality through the photosensor that detects the state of the detection gear at the end surface
2Volume of moving object
If the detection gear is positioned on the side wall opposite to the input gear, then space utilization improves, but the driving force transmission becomes more complex
Solution Approach 1:
The patent introduces an intermediate gear as a mediator between the input gear and detection gear. This intermediate gear receives rotational force from the input gear on one side wall and transmits it to the detection gear on the opposite end surface, enabling force transmission across the cartridge while maintaining a compact design. The intermediate gear acts as a bridge that simplifies the overall transmission mechanism despite the spatial separation of components
Data Source
AI summary
In a cartridge, a housing has a developer accommodating portion and includes a first side wall and a second side wall. A coupling member is disposed at a position opposite to the developer accommodating portion with respect to the first side wall. A detection body is disposed at a position opposite to the developer accommodating portion with respect to the second side wall. A first driving force transmission member is positioned at the same side with the coupling member with respect to the first side wall, and transmits driving force from the coupling member to a rotating member. A second driving force transmission member is positioned at the same side with the detection body with respect to the second side wall, and transmits driving force from the rotating member to the detection body.