Developer Carrier Eccentric Rotation Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing developer carriers in image forming apparatuses are susceptible to eccentric rotation due to dimensional inaccuracies, leading to nonuniformity in toner images formed on photoconductor drums, which affects the quality of the final printed images.
Innovation Solution
A developer carrier design featuring a rotatable transmitting member and a developer carrying member that is coaxially positioned and displaceable in the intersecting direction, allowing the developing sleeve to receive driving force through a transmitting ring with multiple recesses and projections, thereby reducing the likelihood of eccentric rotation and ensuring consistent distance and toner distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed developer carrier structure is used, then the structure is simple, but dimensional inaccuracies cause eccentric rotation and nonuniform toner images
Solution Approach 1:
The developer carrier structure is changed from fixed to dynamic, allowing the developing sleeve to be displaced radially relative to the transmitting member. This dynamic adjustment capability compensates for dimensional inaccuracies and prevents eccentric rotation, resolving the contradiction between structural simplicity and manufacturing precision.
Solution Approach 2:
The radial position of the developing sleeve is made variable through displacement along the radial direction, allowing adjustment of the parameter (radial position) to compensate for manufacturing tolerances. This enables the system to maintain uniform toner image formation despite dimensional variations in the components.
2Stability of the object's composition
If the developing sleeve is fixed to the transmitting member, then the structure is stable, but dimensional variations cause eccentric rotation and image nonuniformity
Solution Approach 1:
The connection between the developing sleeve and transmitting member is changed from rigid fixed to dynamic displaceable connection. The developing sleeve can move radially while maintaining rotational stability, which resolves the contradiction by allowing positional adjustment to compensate for dimensional variations while maintaining operational stability.
3Reliability
If multiple recesses and projections are used for driving force transmission, then the load is dispersed and eccentric rotation is reduced, but the device complexity increases
Solution Approach 1:
The driving force transmission interface is segmented into multiple recesses and projections instead of a single contact point. This segmentation disperses the load across multiple points, reducing the impact of dimensional variations and preventing eccentric rotation. The segmentation approach resolves the contradiction by improving rotation uniformity through distributed load bearing.
Data Source
AI summary
A developer carrier includes a transmitting member that is rotatable and transmits a driving force; and a developer carrying member that carries developer and is provided coaxially with the transmitting member, the developer carrying member being rotatable when receiving the driving force from the transmitting member, the developer carrying member being displaceable with respect to the transmitting member in an intersecting direction that intersects an axial direction of the transmitting member.