Toner Cartridge Shutter Interface for Independent Toner Refill
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Solution Overview
Problem
Conventional image forming apparatuses require replacing the developing roller along with the toner cartridge even when the developing roller is not at the end of its service life, leading to unnecessary replacements and potential inefficiencies.
Innovation Solution
An image forming apparatus design that allows the toner cartridge to be attached to a process cartridge, with a toner shutter pivotally movable to open and close the toner outlet port, enabling electrical connection between the toner cartridge and process cartridge contacts, facilitating toner replenishment without replacing the developing roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the toner cartridge is replaced along with the developing roller, then the image forming apparatus can be replenished with toner, but the developing roller is replaced unnecessarily even when it does not reach the end of service life
Solution Approach 1:
The system is divided into two independent replaceable units: a process cartridge containing the developing roller and a separate toner cartridge. This segmentation allows the toner cartridge to be replaced independently when toner is depleted, while the process cartridge with the developing roller can remain in use until its actual service life ends, eliminating unnecessary replacements.
2Loss of substance
If the toner cartridge is made independently replaceable, then unnecessary developing roller replacement is avoided, but the device structure becomes more complex requiring additional electrical contacts and control mechanisms
Solution Approach 1:
The process cartridge is designed with dual functionality: it serves as both the developing unit and an electrical interface platform. The process cartridge includes electrical contacts that can interface with both the main housing and the toner cartridge, allowing it to perform both mechanical development functions and electrical communication functions, thereby managing complexity through multi-functionality.
3Productivity
If the toner cartridge is attached to the process cartridge, then toner replenishment can be performed without replacing the developing roller, but the toner cartridge must be attachable and detachable requiring additional structural features
Solution Approach 1:
The toner cartridge is designed with dynamic attachment and detachment capabilities, allowing it to be connected to or separated from the process cartridge as needed. This dynamic interface enables flexible toner replenishment operations where the toner cartridge can be quickly attached for refilling and detached for replacement, improving productivity while managing structural complexity through standardized dynamic interfaces.
Data Source
AI summary
An image forming apparatus includes: a main housing including a main electrical contact; a process cartridge attachable to and detachable from the main housing; and a toner cartridge attachable to and detachable from the process cartridge attached to the main housing. The process cartridge includes: a first process electrical contact configured to contact the main electrical contact; and a second process electrical contact. The toner cartridge includes: a toner housing having a toner outlet port and configured to accommodate toner therein; a toner memory including a toner electrical contact; and a toner shutter. In a state where the toner cartridge is attached to the process cartridge, the toner electrical contact is in contact with the second process electrical contact; and the toner shutter is pivotally movable relative to the second process electrical contact and the toner electrical contact to open and close the toner outlet port.