Pivoting Toner Shutter for Process Cartridge Replenishment
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Solution Overview
Problem
Conventional image forming apparatuses require replacement of the developing roller even when it does not reach the end of its service life, leading to unnecessary cartridge replacement and the need for a toner memory in the toner cartridge to enable control operations.
Innovation Solution
An image forming apparatus with a process cartridge and toner cartridge design that allows the toner cartridge to be attached to and detached from the process cartridge, featuring a toner shutter that pivots to open and close the toner outlet port, enabling electrical connection between the toner memory and the process cartridge, thus allowing toner replenishment without replacing the developing roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the toner cartridge is made detachable from the process cartridge, then toner replenishment becomes easier and waste is reduced, but the device structure becomes more complex
Solution Approach 1:
The cartridge system is divided into two independent parts: a process cartridge containing the developing roller and a separate toner cartridge. This segmentation allows the toner cartridge to be detached and replaced independently, enabling easy toner replenishment without replacing the entire process cartridge, thus resolving the contradiction between ease of operation and device complexity.
2Loss of substance
If the toner cartridge is made detachable, then unnecessary components are not replaced, but electrical connectivity for control operations becomes more difficult to maintain
Solution Approach 1:
An electrical connection structure is introduced as an intermediary component that maintains electrical connectivity between the main housing and the process cartridge even when the toner cartridge is detached. This mediator ensures control operations continue to function properly, resolving the contradiction between reducing component replacement and maintaining electrical connectivity.
3Extent of automation
If a toner memory is provided in the toner cartridge, then control operations can be performed, but the device complexity increases
Solution Approach 1:
The toner memory is merged with the toner cartridge, allowing control operations to be performed based on information stored in the memory. This integration enables automated tracking of toner usage and cartridge identification, achieving the desired automation capability while keeping the structure unified and manageable.
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.