Toner Cartridge Shutter Control for Leak-Safe 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 discharge opening and a movable shutter, and a moving device with a contact member to control the shutter's position based on the cartridge's movement, ensuring toner is supplied and leakage is minimized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the toner cartridge is made detachable for easy replacement, then the ease of operation is improved, but the risk of toner leakage during movement increases
Solution Approach 1:
The toner shutter is opened in advance before the toner cartridge is moved to the mounting position, and closed in advance before movement to the retreat position. This preliminary action ensures that the discharge opening is ready for toner supply when the cartridge is mounted, and prevents toner leakage when the cartridge is being moved or removed from the apparatus body.
Solution Approach 2:
The toner shutter acts as an intermediary component between the toner cartridge and the developing unit. It controls the flow of toner by opening or closing the discharge opening, thereby mediating the toner supply process and preventing uncontrolled toner leakage during cartridge movement and replacement operations.
2Productivity
If the toner shutter is continuously open to ensure toner supply, then the productivity is improved, but the risk of toner leakage increases
Solution Approach 1:
The toner shutter is designed as a dynamic component that can automatically open and close based on the position of the toner cartridge. It opens when the cartridge is at the mounting position to enable continuous toner supply to the developing unit, and closes when the cartridge moves to the retreat position, thereby adapting the toner flow control to the operational state without manual intervention.
Solution Approach 2:
The moving device incorporates a contact member that detects the position of the toner cartridge and provides feedback to control the toner shutter. When the contact member detects that the cartridge has reached the mounting position, it triggers the shutter to open for toner supply; when the cartridge moves to the retreat position, the contact member triggers the shutter to close, ensuring toner supply continuity while preventing leakage through position-based feedback control.
3Reliability
If the contact member continuously contacts the toner shutter to control movement, then the reliability of shutter control is improved, but the complexity of the moving device increases
Solution Approach 1:
The control function for the toner shutter is extracted from a complex centralized control system and implemented through a simple contact member mechanism. The contact member, which is a straightforward mechanical component, directly interacts with the toner cartridge to trigger shutter opening and closing actions, thereby achieving reliable shutter control through a simplified, distributed control approach that reduces overall device complexity.
Data Source
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AI summary
An image forming apparatus (1; 501) includes (i) a developing unit (50; 50y, 50m, 50c, 50k; 150) including a storage frame (53; 53y, 53m, 53c, 53k; 553) having a receiving opening (53b; 53bR, 53bL; 553b), (ii) a toner cartridge (70; 70y, 70m, 70c, 70k; 270; 570) including a toner frame (71; 171; 271; 571) having a discharge opening (71b; 71bR, 71bL), and a toner shutter (76; 76R, 76L; 176) 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 (85; 85y, 85m, 85c, 85k; 85') configured to move the toner cartridge from the mounting position toward the retreat position. The moving device includes a contact member (80; 294b; 494a) 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.