Developing Cartridge Inclined-Surface Separation for Compact Drum Protection
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Solution Overview
Problem
The complex separator structures in existing developing cartridges for electrophotographic image forming apparatuses hinder miniaturization and increase manufacturing costs, while long-term contact between the developing roller and photosensitive drum can cause damage.
Innovation Solution
A developing cartridge with a simple structure featuring a separator that receives a separation force applied by a separation force output member, utilizing a first inclined surface to move the casing away from the photosensitive drum, allowing for stable operation and separation without complex mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separator is provided to separate the developing roller and photosensitive drum, then damage to the developing roller and photosensitive drum is prevented, but the structure becomes complex and manufacturing cost increases
Solution Approach 1:
The separator is integrated with the casing as a unified structure rather than being a separate component. The first inclined surface is formed directly on the separator portion of the casing, combining the separator function with the structural housing to reduce part count and simplify manufacturing while maintaining the separation capability.
2Reliability
If a separator with complex structure is used to prevent damage, then the developing roller and photosensitive drum are protected, but miniaturization of the developing cartridge is hindered
Solution Approach 1:
The separator is merged with the casing structure, eliminating the need for additional separate separator components. This integration reduces the overall volume required for the separator mechanism while maintaining its protective function, enabling miniaturization of the developing cartridge.
Solution Approach 2:
The separator structure serves multiple functions: it separates the developing roller from the photosensitive drum, provides structural support as part of the casing, and guides the separation movement through its inclined surface. This multi-functionality reduces the need for additional components, allowing for a more compact design.
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 enables stable operation and prevents damage to the developing roller and photosensitive drum, facilitating miniaturization and reducing manufacturing costs by simplifying the cartridge design.
Implementation Method 1
a separator for receiving a separation force applied by the separation force output member that causes the casing to move, the separator including a first inclined surface where the separation force output member moves in the first direction and abuts against the first inclined surface, and the separator being positioned at the first side
Data Source
AI summary
A developing cartridge can be detachably installed on a drum cartridge in an image forming apparatus, where a mounting cavity is provided on the drum cartridge and a photosensitive drum and a first groove wall are provided in the mounting cavity. The developing cartridge includes: a casing having a first side and second side arranged oppositely along a first direction, where the casing can be installed in the mounting cavity along a second direction; a developing roller rotatably arranged in the casing, where the rotation axis of the developing roller is parallel to the first direction; and a separator including a force-receiving part, where a first inclined surface is formed on the force-receiving part, and the first inclined surface receives a separation force provided by the image forming apparatus and drives the casing to move in a direction away from the photosensitive drum.