Developing Cartridge With Single-Member Photosensitive Drum Separation
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Solution Overview
Problem
Existing developing cartridges require complex structures with multiple separation members at both ends of the developing roller to separate from the photosensitive drum, leading to increased parts and costs.
Innovation Solution
A developing cartridge design with a single separation member that uses a swinging mechanism to separate the developing roller from the photosensitive drum, utilizing a separation member and abutting members to facilitate contact and separation through a sliding and swinging motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separation members are provided at both ends of the developing cartridge to separate the two ends of the developing roller from the photosensitive drum, then the developing roller can be effectively separated from the photosensitive drum, but the structure of the developing cartridge becomes complex with more parts and higher cost
Solution Approach 1:
The patent combines multiple separation members into a single integrated separation member that spans across the developing roller. This single separation member has first and second separation portions that can simultaneously separate both ends of the developing roller from the photosensitive drum, thereby reducing the total number of parts while maintaining effective separation functionality.
Solution Approach 2:
The single separation member is designed to perform multiple functions: it can separate both ends of the developing roller simultaneously, maintain a uniform gap between the developing roller and photosensitive drum, and work effectively in the limited space between the developing cartridge and photosensitive drum. This multi-functionality reduces the need for multiple separate components.
2Reliability
If separation members are provided at both ends of the developing cartridge, then complete separation of the developing roller from the photosensitive drum is achieved, but the number of parts increases leading to higher cost
Solution Approach 1:
The patent merges multiple separation members into one integrated component. This single separation member includes first and second separation portions that correspond to the first and second ends of the developing roller respectively, allowing complete separation of both ends while using only one part instead of two separate members.
Solution Approach 2:
The single separation member is segmented into multiple functional portions (first separation portion and second separation portion) that can independently interact with different ends of the developing roller. This segmentation within a unified structure allows complete separation functionality while maintaining a reduced part count.
Data Source
AI summary
A developing cartridge includes a casing, configured to accommodate developer therein, the casing having a first side and a second side arranged oppositely in a first direction, and a third side and a fourth side arranged oppositely in a second direction, the first direction and the second direction intersecting; a developing roller rotatable about a first axis extending in the first direction and positioned at the third side; a coupling rotatable about a second axis extending in the first direction and positioned at the first side; a storage medium including an electrical contact surface, the electrical contact surface being positioned at the first side; a separation member protruding in the first direction, the separation member receiving a separation force to cause the casing to move, and the separation member being positioned at the first side; and a first abutting member being positioned at the second side.