Rotational Force Driving Assembly Axis Offset Mechanism
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Solution Overview
Problem
The existing rotational force driving assemblies in electrophotographic image forming devices face interference issues during installation due to assembly errors, leading to incomplete engagement between the rotational driving force head and the receiving head, preventing proper installation of the process cartridge.
Innovation Solution
A rotational force driving assembly with an axis offset adjusting mechanism, comprising a hub, a rotational force receiving component, and a side plate, where the axis offset mechanism allows parallel offset of the rotational force receiving component relative to the hub axis, enabling engagement with the rotational force driving head after installation, utilizing sliding pieces and elastic elements for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the rotational force receiving head is pre-inclined relative to the photosensitive member axis during assembly, then the engagement process can accommodate assembly errors and internal part looseness, but the receiving head may interfere with the rotational force driving head during installation, preventing proper engagement
Solution Approach 1:
The rotational force receiving head is designed to be dynamically adjustable during installation. It transitions from a pre-inclined state (allowing engagement adaptability) to a straightened coaxial state (enabling proper engagement) through the installation process itself, making the system adaptable rather than fixed
Solution Approach 2:
The rotational force receiving head is pre-inclined relative to the photosensitive member axis before installation. This preliminary inclination allows the receiving head to clear the driving head during insertion, and the inclination is corrected to coaxial alignment as installation progresses, preventing interference while maintaining adaptability
2Manufacturing precision
If the rotational force receiving head is kept straight and coaxial with the photosensitive member axis, then proper engagement with the driving head is achieved, but assembly errors and internal part looseness cause installation failure
Solution Approach 1:
The system transitions from a static coaxial alignment requirement to a dynamic alignment process. The receiving head starts inclined (accommodating manufacturing tolerances) and becomes coaxial through the installation motion, making the system reliable despite precision variations
Solution Approach 2:
The angular parameter of the receiving head changes during installation from an inclined state to a coaxial state. This parameter change allows the system to accommodate assembly errors initially and achieve proper alignment finally, resolving the contradiction between precision requirement and reliability
Data Source
AI summary
The present disclosure provides a process cartridge detachably mountable to an electrophotographic image forming device. The process cartridge includes a housing, a coupling component provided at one end of the housing for receiving rotational driving force from a driving head inside the electrophotographic image forming device, and a limiting protrusion provided at the other end of the housing. The limiting protrusion abuts a lateral wall in the electrophotographic image forming device when the process cartridge is installed into the electrophotographic image forming device, and a guiding surface is provided at the limiting protrusion. Further, the guiding surface abuts the lateral wall in the electrophotographic image forming device, and a rotational axis of the coupling component inclines with respect to a rotational axis of the driving head when the process cartridge is detached from the electrophotographic image forming device.