Cartridge Detection via Electrode Connection Sequence
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Solution Overview
Problem
The existing image forming apparatuses of the electrophotographic type have complex configurations for detecting cartridge information, which complicates the process of determining whether a developing cartridge is new or not.
Innovation Solution
An image forming apparatus with a simpler configuration that includes a main casing, a detachably mountable cartridge with a cartridge side electrode, and a determining unit in the main casing, where the determining unit moves between connection and disconnection positions to detect the cartridge's state by temporarily disconnecting and reconnecting the main casing side electrode with the cartridge side electrode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an actuator and photosensor are provided in the main casing to detect cartridge information, then the cartridge detection function is achieved, but the configuration becomes complicated
Solution Approach 1:
The patent extracts the detection function from the main casing by moving it to the cartridge itself. The cartridge includes a detection gear with a protrusion that directly interacts with the main casing side electrode, eliminating the need for separate actuators and photosensors in the main casing. This extraction simplifies the main casing configuration while maintaining reliable cartridge detection.
Solution Approach 2:
The cartridge performs self-detection through its own structural features. The detection gear and protrusion on the cartridge interact with the main casing side electrode to automatically trigger the determining unit to identify the cartridge as new, without requiring external detection mechanisms in the main casing. This self-service approach reduces overall system complexity.
2Measurement precision
If a detection gear with protrusion is used to swing the actuator, then the cartridge mounting detection is achieved, but the configuration becomes complicated
Solution Approach 1:
The patent removes the actuator and photosensor from the main casing and relocates the detection mechanism to the cartridge. The detection gear with protrusion on the cartridge directly engages with the main casing side electrode, eliminating the need for the actuator swinging mechanism and photosensor in the main casing, thus simplifying the overall configuration while maintaining detection precision.
Solution Approach 2:
The patent replaces the mechanical actuator-swinging mechanism with a direct electrical interaction system. Instead of using a mechanical actuator that swings to trigger a photosensor, the cartridge's detection gear directly interacts with the main casing side electrode to establish electrical connection, thereby simplifying the system by eliminating complex mechanical components.
3Reliability
If the main casing side electrode is electrically connected to the cartridge side electrode, then the cartridge state can be determined, but the configuration becomes complicated
Solution Approach 1:
The patent extracts the electrical connection function from the main casing to the cartridge. The cartridge includes a detection gear with a protrusion that directly engages with the main casing side electrode, establishing electrical connection without requiring complex configurations in the main casing. This extraction simplifies the main casing while maintaining reliable state determination.
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 solution allows for the detection of a new cartridge with a simpler configuration, reducing complexity and improving the efficiency of determining the cartridge's state without requiring an actuator or optical sensor, thereby facilitating easier maintenance and operation.
Implementation Method 1
the main casing side electrode being electrically connected to the cartridge side electrode
Data Source
AI summary
In an image forming apparatus, a cartridge has a cartridge side electrode. A main casing has a main casing side electrode. The cartridge includes a moving member that allows the main casing side electrode to be located at a connection position when the moving member is at a first position, to be located at a disconnection position when the moving member is at a second position, and to be located at the connection position when the moving member is at a third position. A determining unit determines that the cartridge's state is new if the determining unit detects that the main casing side electrode is electrically connected to the cartridge side electrode, then the main casing side electrode is electrically disconnected from the cartridge side electrode temporarily, and then the main casing side electrode is again electrically connected to the cartridge side electrode.