Toner Cartridge Shutter Control for Leak-Free Replacement
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Solution Overview
Problem
Existing image forming apparatuses with rotary developing systems face challenges in efficiently managing toner supply and preventing toner leakage during cartridge replacement and movement.
Innovation Solution
The image forming apparatus incorporates a developing unit with a storage frame, a toner cartridge having a movable shutter, and a drive device to control the toner cartridge's movement between mounting and retreat positions, ensuring the shutter closes during retreat, thereby preventing toner leakage and facilitating easy toner supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the toner cartridge is moved from the mounting position to the retreat position for cartridge replacement, then the ease of operation is improved, but toner leakage occurs
Solution Approach 1:
The toner shutter is configured to close automatically in advance before the toner cartridge is fully retracted from the mounting position. This preliminary action of closing the shutter prevents toner leakage during the cartridge replacement process while still allowing easy removal and installation of the cartridge.
2Object-generated harmful factors
If the toner shutter remains closed during toner supply, then toner leakage is prevented, but toner supply to the developing unit is blocked
Solution Approach 1:
The toner shutter is designed as a movable component that dynamically changes its position based on the operational state. It is open during toner supply to allow toner flow from the storage chamber to the developing unit, and closes during cartridge retraction to prevent leakage. This dynamic adjustment resolves the contradiction between preventing leakage and maintaining productivity.
Data Source
AI summary
An image forming apparatus includes (i) a developing unit including a storage frame having a receiving opening, (ii) a toner cartridge including a toner frame having a discharge opening, and a toner shutter movable between a closed position to cover the discharge opening and an open position to expose the discharge opening, the toner cartridge being movable relative to the storage frame between a mounting position at which the discharge opening faces the receiving opening and a retreat position at which the toner cartridge is moved from the mounting position, and (iii) a moving device configured to move the toner cartridge from the mounting position toward the retreat position. The moving device includes a contact member configured to contact the toner cartridge, and, while the toner cartridge is moving from the retreat position to the mounting position, the contact member is separated from the toner shutter.