Shutter Linkage Mechanism for Automatic Cartridge-Driven Positioning
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Solution Overview
Problem
Conventional image-forming apparatuses face issues with accidental opening of the shutter during cartridge detachment, potential degradation in printing accuracy due to unnecessary force from the link member, and inaccurate closure of the shutter.
Innovation Solution
The image-forming apparatus incorporates a connection link that moves the shutter in conjunction with the attachment and detachment of the cartridge, preventing accidental opening and reducing the likelihood of adverse effects on printing accuracy by ensuring proper alignment and force distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the link member is positioned in the accommodation space for accommodating the cartridge, then the shutter can be opened and closed in conjunction with cartridge attachment and detachment, but a user may contact the link member when detaching the cartridge, resulting in accidental opening of the shutter
Solution Approach 1:
The link member is extracted from the accommodation space and repositioned to a location outside the cartridge accommodation area. This allows the link member to remain functional for shutter operation while being inaccessible to users during cartridge detachment, preventing accidental contact and shutter opening.
2Ease of operation
If the attached cartridge is kept in contact with the link member connected to the movable shutter, then the shutter can be opened and closed in conjunction with cartridge attachment and detachment, but unnecessary force may be imparted on the attached cartridge from the link member, causing degradation in printing accuracy
Solution Approach 1:
The link member is extracted from the cartridge contact zone and repositioned to a location where it does not interfere with the cartridge. This eliminates the unnecessary force transmission from the link member to the cartridge, thereby maintaining printing accuracy while preserving shutter operation functionality.
3Ease of operation
If the shutter is configured to open and close in interlocking relation to the movement of the cartridge, then the shutter can be opened and closed in conjunction with cartridge attachment and detachment, but nothing is known as to how the shutter is closed, conceivably the shutter may not be accurately moved to its closed position
Solution Approach 1:
A feedback mechanism is introduced to monitor and control the shutter's movement. This ensures that the shutter accurately returns to its closed position by providing real-time position information and adjusting the closing action accordingly, thereby improving shutter position accuracy while maintaining the interlocking operation with the cartridge.
Data Source
AI summary
An image-forming apparatus includes a housing, a cartridge, and a fixing device. The fixing device includes a heating member, a fixing frame, and a shutter movable between an open position for opening an opening of the fixing frame and a closed position for closing the opening. The housing includes: a guide frame for guiding a guide protrusion of the cartridge for attachment of the cartridge to the housing; and a connection link connected to the shutter and positioned opposite the cartridge with respect to the guide frame. The connection link moves the shutter to the open position in conjunction with the attachment of the cartridge to the housing, and moves the shutter to the closed position in conjunction with detachment of the cartridge from the housing. The connection link abuts on the guide protrusion through a through-hole of the guide frame during the attachment of the cartridge to the housing.