Developer Agitator Positioning for Stable Supply
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing developing devices struggle to effectively agitate developers near the developer supplying roller, leading to unstable developer supply and uneven image density due to the agitator's distance from the developer carrying and supplying components.
Innovation Solution
A developing device with a rotatable developer agitator that includes a continuous foam elastic layer and a flexible member, positioned above the developer supplying roller in the gravity direction, to facilitate developer circulation and agitation, ensuring efficient developer supply and maintaining flowability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the agitator is spaced away from the developer carrying member and developer supplying roller, then the structure is simpler and easier to manufacture, but it is difficult to fully agitate gathered or degraded developer in the vicinity of the developer supplying roller
Solution Approach 1:
The patent positions the agitator above the developer supplying roller in the gravity direction, utilizing vertical space rather than horizontal spacing. This dimensional arrangement allows the agitator to be close to the developer supply interface without complicating the horizontal structure, enabling effective agitation while maintaining manufacturing simplicity.
Solution Approach 2:
The patent defines a specific predetermined region above the developer supplying roller where agitation is most needed, and positions the agitator to specifically target this local area. This localized agitation approach ensures reliable developer supply at the critical interface without requiring complex overall structural changes.
2Device complexity
If the agitator is positioned far from the developer supplying roller, then the device structure is simpler, but developer supply becomes unstable leading to uneven image density
Solution Approach 1:
The patent utilizes the vertical dimension by positioning the agitator above the developer supplying roller in the gravity direction. This allows the agitator to be spatially close to the critical developer supply region without increasing horizontal device complexity, thereby maintaining simple device structure while achieving uniform image density through effective local agitation.
Solution Approach 2:
The patent positions the agitator to preemptively agitate developer in the predetermined region before it reaches the developer supplying roller. This preliminary agitation prevents developer aggregation and degradation at the supply interface, ensuring stable developer supply and uniform image density without requiring complex real-time control mechanisms.
3Reliability
If the agitator is close to the developer supplying roller, then developer agitation is more effective, but the device structure becomes more complex
Solution Approach 1:
The patent focuses agitation functionality on a specific predetermined region above the developer supplying roller, rather than distributing agitation throughout the entire developer container. This localized approach achieves reliable developer supply stability at the critical interface without requiring a complex overall agitator structure or multiple agitation points.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution ensures stable and consistent developer supply to the developer carrying member, preventing density increases and maintaining high-quality image formation by effectively agitating the developer near the supplying roller, thus enhancing image density uniformity.
Implementation Method 1
a continuous foam elastic layer configured to supply the developer to the developer carrying member. In a direction of rotation of the developer supplying roller, a region where the elastic layer is elastically deformed from its natural state by coming into contact with the developer carrying member
Implementation Method 2
The agitator is rotatable in the same direction as the developer supplying roller and configured to agitate at least part of a predetermined region above the developer supplying roller in a gravity direction
Data Source
AI summary
An elastically deformable region of an elastic layer in a developer supplying roller is near an agitator. In a state where the agitator agitates a predetermined region or where the agitator is in contact with the developer supplying roller, the agitator is rotated in the same direction as the developer supplying roller.