Developing Cartridge Drive End Separation Force Receiving Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing developing cartridges in electrophotographic imaging apparatuses face issues with premature degradation and uneven image development due to prolonged contact between the developing roller and photosensitive drum, leading to wear and deformation of the separating force receiving parts, which affects the reliability and stability of the separation mechanism.
Innovation Solution
The developing cartridge features a drive force receiving member with a driving end separation force receiving member positioned on the outer circumference, allowing for variable contact positions and reduced wear, and a snap connection or rotatable design to enhance reliability and stability, along with a larger force-receiving area to prevent deformation and loosening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the separating force receiving part is provided on the drive end cover with a fixed contact position, then the structure is simple, but the separating force receiving part is easily worn or deformed after long-term use
Solution Approach 1:
The patent applies the dynamics principle by making the drive force receiving member rotatable rather than fixed. The member can rotate about its axis while maintaining engagement with the separating force transmitting member, allowing the contact position to change dynamically during operation. This rotational capability distributes wear across the entire circumferential surface of the drive force receiving part, preventing localized wear and deformation while maintaining structural simplicity.
2Ease of manufacture
If the drive end cover is fixedly mounted by a screw, then the mounting process is simple, but the screw may not be firm due to human reasons causing the drive end cover to loosen
Solution Approach 1:
The patent applies segmentation by dividing the mounting system into multiple fastening points. Instead of relying on a single screw, the drive end cover is secured by multiple screws distributed around the perimeter. This segmentation ensures that if one screw becomes loose, the cover remains firmly attached through the other screws, significantly improving reliability while maintaining ease of manufacture through a straightforward multi-screw assembly process.
3Volume of moving object
If the separating force receiving part has a small force-receiving area, then the volume is reduced, but the separating force receiving part is easily worn or deformed
Solution Approach 1:
The patent applies dimensionality change by utilizing the rotational dimension of the drive force receiving member. The force-receiving surface is extended from a small fixed area to a large circumferential area through rotation. As the member rotates, different portions of its outer surface engage with the separating force transmitting member, effectively increasing the force-receiving area without increasing the overall volume of the drive end cover.
Data Source
AI summary
An embodiment of the present disclosure provides a developing cartridge, including: a developing cartridge frame having an internal space for accommodating a developing agent; a developing roller rotatably mounted on the developing cartridge frame and configured to supply the developing agent to a photosensitive drum; a drive end cover mounted on a drive end of the developing cartridge frame; and a drive force receiving member rotatably mounted on a drive end of the developing cartridge frame; where the drive force receiving member includes a drive force receiving part that extends out of the drive end cover and receives a rotational drive force. A driving end separation force receiving member is provided on an outer circumference of the drive force receiving part. The driving end separation force receiving member is configured to receive a separating force that separates the developing roller from the photosensitive drum.