Shutter Mechanism for Toner Leakage Prevention in Image Forming Apparatus
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In color laser printers, there is a risk of toner leakage from used developing cartridges during transportation due to disturbances, as the take-up shaft is not activated to seal the toner container after use, leading to potential toner leakage.
Innovation Solution
An image forming apparatus with a shutter mechanism that moves to a closed position based on detected usage state and exchange timing, preventing toner flow between the developer accommodating and developing portions during cartridge exchange, ensuring toner containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the take-up shaft is not activated after the toner seal member is taken up, then the structure is simple and easy to operate, but the toner container remains open and toner may leak during transportation
Solution Approach 1:
The shutter is activated in advance before the developing cartridge is installed in the image forming apparatus. This preliminary action ensures that the toner container is sealed before any potential leakage during transportation, eliminating the need for complex post-installation sealing mechanisms.
Solution Approach 2:
The shutter acts as an intermediary element between the toner container and the developing portion. It provides a controllable seal that can be activated independently, allowing the toner container to be sealed without requiring the take-up shaft to be activated again, thus simplifying the overall mechanism while ensuring reliability.
2Reliability
If the shutter is activated before cartridge installation, then toner leakage is prevented, but the cartridge cannot be exchanged timely when usage reaches the limit
Solution Approach 1:
The shutter mechanism is designed to be dynamically controllable, allowing it to be activated at appropriate timing before cartridge installation. The system can detect when the developing cartridge needs to be exchanged and activate the shutter accordingly, balancing toner containment with timely cartridge exchange.
Solution Approach 2:
The image forming apparatus monitors the usage state of the developing cartridge and provides feedback to control the shutter activation timing. This feedback mechanism ensures that the shutter is activated at the optimal moment before cartridge installation, preventing toner leakage while allowing timely cartridge exchange when usage reaches the limit.
Data Source
AI summary
An image forming apparatus includes: a body of the image forming apparatus; and a cartridge installable with respect to the body, wherein the cartridge includes a developer accommodating portion accommodating a developer; a developing portion supporting a developer holding member holding the developer thereon; and a shutter configured to be movable between an open position at which the shutter opens a communication port and a closed position at which the shutter closes the communication port. The body includes a detecting section detecting a state of the cartridge which changes as the cartridge is used, and a judging section judging whether or not a cartridge exchange timing for exchanging the cartridge has arrived, based on the state of the cartridge detected by the detecting section; and the shutter moves to the closed position under a condition that the judging section judges that the cartridge exchange timing has arrived.