Conductive Spring Developer Roller Cartridge Integration
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Solution Overview
Problem
In conventional image forming apparatuses, the separate disposition of the urging unit and power supply member for the developer roller can interfere with the developer roller's positioning, leading to unstable development.
Innovation Solution
A cartridge design where the urging unit, formed by a conductive spring member, both urges the developer roller towards the photosensitive drum and transfers voltage from a power supply unit, ensuring accurate positioning and power supply to the developer roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the urging unit and power supply member are separately disposed, then the power supply member can be independently installed, but the power supply member may interfere with the action of the developer cartridge and fail to stably position the developer roller
Solution Approach 1:
The patent combines the urging unit and power supply member into a single integrated structure. The power supply member is designed to simultaneously perform both power supply and positioning functions, eliminating the interference that occurs with separate disposition while maintaining independent installability through modular cartridge design.
2Reliability
If the urging unit is integrated with the power supply member, then the developer roller can be stably positioned, but the structure becomes more complex
Solution Approach 1:
The power supply member is designed as a multi-functional component that simultaneously performs power supply, urging, and positioning functions. This universal design consolidates multiple functions into a single structure, reducing overall device complexity while maintaining reliable developer roller positioning.
3Ease of manufacture
If separate urging unit and power supply member are used, then manufacturing is simpler, but the developer roller positioning becomes unstable
Solution Approach 1:
The integration of urging and power supply functions into a single member ensures that the developer roller is consistently positioned at the correct distance from the photosensitive drum surface. This unified structure eliminates positioning variations that would occur with separate components, achieving manufacturing precision through functional integration.
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
This configuration allows for stable and accurate positioning of the developer roller, enhancing the development process and preventing printing failures by integrating the urging and power supply functions within a single structure.
Implementation Method 1
the urging unit is structured to transfer a voltage from a power supply unit to the developer roller
Implementation Method 2
the urging unit is structured to urged the developer roller towards the photosensitive member
Data Source
AI summary
A cartridge set in a main body of an image forming apparatus including a developer roller positioned opposite a photosensitive member and a frame including the developer roller and in contact with an urging unit, wherein the urging unit is structured to urged the developer roller towards the photosensitive member, also the urging unit is structured to transfer a voltage from a power supply unit to the developer roller.