Retractable Fixing Device for Drawer Unit Movement
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Solution Overview
Problem
Existing image forming apparatuses face challenges in efficiently moving a drawer unit with a cartridge and support member, as the movement is restricted by the positioning of the fixing device within the apparatus main body.
Innovation Solution
The image forming apparatus is designed with a retractable fixing device that moves from a use position to a retracted position, allowing the drawer unit to move freely from an inner to an outer position, while ensuring the fixing device is positioned higher than the opening and closing member at its closed position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the fixing device is positioned at the use position, then the image forming function is maintained, but the drawer unit movement is restricted
Solution Approach 1:
The fixing device is made movable between a use position (where it performs image forming) and a retracted position (where it allows drawer unit movement). This dynamic repositioning resolves the contradiction by adapting the fixing device position based on operational requirements.
Solution Approach 2:
The operating cycle is segmented into distinct phases: image forming phase (fixing device at use position) and cartridge replacement phase (fixing device at retracted position). This temporal segmentation allows both functions to operate optimally at different times.
2Ease of operation
If the fixing device is retracted to allow drawer unit movement, then cartridge replacement is facilitated, but the fixing device position becomes higher than the opening and closing member
Solution Approach 1:
The fixing device is moved vertically (in the vertical dimension) to a retracted position above the opening and closing member, rather than moving horizontally. This dimensional change allows the drawer unit to move freely in the horizontal direction without obstruction.
3Volume of moving object
If the apparatus size is kept compact, then space efficiency is improved, but the fixing device obstructs the tray unit movement path
Solution Approach 1:
The fixing device dynamically changes its position between use and retracted states, allowing the tray unit to pass through the space normally occupied by the fixing device during movement, thus enabling compact design without sacrificing operational ease.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables the efficient movement of the drawer unit, allowing for easy replacement of cartridges and maintenance, while maintaining a compact apparatus size and ensuring the fixing device does not obstruct the movement of the tray unit.
Implementation Method 1
a fixing device configured to heat the recording material at a use position
Data Source
AI summary
An image forming apparatus includes a fixing device to heat a recording material at a use position, an opening and closing member, and a drawer unit. In a state where the fixing device is at the use position, part of the fixing device is located in a space for the drawer unit to pass through when moved from a first inner position to a first outer position so that movement of the drawer unit from the first inner to the first outer position is restricted. The fixing device is retracted from the use position to a retracted position so that the movement of the drawer unit from the first inner to the first outer position is allowed. Part of the fixing device at the retracted position is at a position higher than a position of an upper cover portion of the opening and closing member at a closed position.