Developing Cartridge Single-End Shaft Movement
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Solution Overview
Problem
Conventional developing cartridges require driving force on both ends to move relative to a photosensitive drum, which complicates the design and increases the size of image forming apparatuses.
Innovation Solution
A developing cartridge design featuring a casing, a developing roller, a shaft, and inclined surfaces, where the shaft and elastic member allow the cartridge to move relative to the photosensitive drum using driving force applied to only one end, simplifying the mechanism and reducing the need for components on both ends.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If driving force is applied to both ends of the developing cartridge to move it relative to the photosensitive drum, then the moving reliability is improved, but the device complexity and size increase
Solution Approach 1:
The patent extracts the driving force requirement from one end of the developing cartridge, eliminating the need for driving components at both ends. The shaft is designed to be movable relative to the casing at one end only, where driving force is applied, while the other end allows free movement. This reduces device complexity while maintaining reliable movement through the single-point driving mechanism combined with the movable shaft design.
2Stability of the object's composition
If driving force is applied to both ends of the developing cartridge, then the movement stability is improved, but the apparatus size increases
Solution Approach 1:
The patent removes the driving mechanism from one end of the apparatus, reducing the overall size. The shaft is configured to be movable relative to the casing, allowing the developing cartridge to move stably with driving force applied at only one end. This extraction of unnecessary components reduces apparatus volume while the movable shaft design maintains movement stability.
3Reliability
If components for moving the developing cartridge are provided on both ends, then the moving reliability is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The patent extracts the moving component from one end of the developing cartridge, simplifying the manufacturing process. Only one end requires precise assembly of driving components, while the other end has a simpler movable shaft structure. This asymmetric design reduces manufacturing complexity compared to symmetric dual-end configurations, while the movable shaft ensures reliable movement.
4Device complexity
If driving force is applied to only one end of the developing cartridge, then the device complexity is reduced, but the moving reliability may deteriorate
Solution Approach 1:
The patent applies dynamics by making the shaft movable relative to the casing. This dynamic configuration allows the shaft to adjust its position and maintain proper alignment during the movement of the developing cartridge. The movable shaft compensates for the single-point driving force application, ensuring reliable movement without requiring complex dual-end driving mechanisms.
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 design enables the developing cartridge to move relative to the photosensitive drum using a single end's driving force, simplifying the apparatus's configuration, reducing size, and improving operational efficiency.
Implementation Method 1
The elastic member is configured to expand and contract in the first direction
Data Source
AI summary
A developing cartridge includes: a casing; a developing roller; a shaft extending in a first direction; a first inclined surface; a second inclined surface; an elastic member; and a first protrusion. The shaft is movable in the first direction relative to the casing and the developing roller, and is movable in the second direction together with the same. The first inclined surface is positioned at one end portion of the shaft, while the second inclined surface is positioned at another end portion of the shaft. The first and second inclined surfaces are inclined relative to the first direction. The first protrusion is movable in the first direction together with the second inclined surface. The shaft is movable from a first position to a second position when the second inclined surface receives a pressing force directed in a direction from the another end portion to the one end portion.