Developing Cartridge Integrated Member Design
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Solution Overview
Problem
Conventional developing cartridges for electro-photographic image forming apparatuses have a high number of parts, which increases complexity and size.
Innovation Solution
The developing cartridge integrates multiple functions into a single structure, including positioning the developing roller relative to the photosensitive drum, supplying a bias voltage, and receiving a pressing force during separation, thereby reducing the number of parts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate members are provided for positioning the developing roller, supplying bias voltage, and receiving pressing force, then each function can be performed reliably, but the number of parts and device complexity increases
Solution Approach 1:
The patent combines three separate functional members into a single integrated member: the positioning member that positions the developing roller, the developing electrode that supplies bias voltage, and the pressing force receiving member are merged into one unified component. This integration maintains all necessary functions while reducing the total number of parts and simplifying the overall device structure
Solution Approach 2:
The integrated member performs multiple functions simultaneously: it positions the developing roller relative to the photosensitive drum, supplies bias voltage through the developing electrode, and receives pressing force during separation. This multi-functional design eliminates the need for separate dedicated components for each function, thereby reducing device complexity while maintaining reliability
2Reliability
If multiple separate members are provided for positioning the developing roller, supplying bias voltage, and receiving pressing force, then each function can be performed reliably, but the size of the developing cartridge increases
Solution Approach 1:
By merging the positioning member, developing electrode, and pressing force receiving member into a single integrated component, the patent reduces the overall volume occupied by these functional elements. The integrated member occupies less space than three separate members would require, thereby reducing the cartridge size while maintaining all necessary functions
Solution Approach 2:
The multi-functional integrated member consolidates multiple functions into one component, eliminating the need for separate dedicated parts that would increase cartridge volume. This universal member performs positioning, voltage supply, and force reception functions within a compact form factor, reducing the overall cartridge size
3Reliability
If multiple separate members are provided for positioning the developing roller, supplying bias voltage, and receiving pressing force, then each function can be performed reliably, but the structure becomes more complex
Solution Approach 1:
The patent merges three separate structural components into one integrated member, simplifying the overall structure. Instead of having distinct positioning mechanisms, electrode assemblies, and force receiving elements, the integrated member provides all functions through a unified structure, thereby reducing structural complexity while maintaining functional reliability
4Device complexity
If the number of parts is reduced by integrating functions, then device complexity and size are reduced, but manufacturing precision requirements may increase
Solution Approach 1:
While merging multiple functions into one member does require precise integration, the patent designs the integrated member with clear functional zones and standardized interfaces that facilitate manufacturing. The positioning features, electrode connections, and force receiving areas are designed to be manufacturable with standard tolerances, balancing integration benefits with manufacturing feasibility
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 integrated approach reduces the number of parts and the size of the developing cartridge, enhancing its efficiency and ease of use while maintaining essential functionality.
Implementation Method 1
a developing electrode for supplying a bias voltage to a shaft of the developing roller
Data Source
AI summary
A developing cartridge may include a developing roller and a casing capable of containing a developer material, a member having a first end portion and a second end portion, the member being movable together with the casing and the developing roller, and the member having a first hole extending in a direction between the first end portion and the second end portion; and a first lever movable relative to the casing between a first position and a second position, the first lever including one end portion that functions as the point of effort, an other end portion that functions as the point of application, and a cam surface that is located between the one end portion and the other end portion and that functions as a pivot point.