Fixing Device Cover Mechanism for Maintenance Access
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Solution Overview
Problem
Existing fixing devices for electrophotographic image forming apparatuses do not facilitate easy maintenance and replacement of the cleaning member, requiring disassembly of the device for maintenance work.
Innovation Solution
A fixing device with a cover that can be moved to open the conveying path, allowing a cleaning device to bring a cleaning member into contact with the fixing or pressing members for cleaning, enabling maintenance without disassembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cleaning member is integrated into the fixing device structure, then the cleaning function is stable and reliable, but the maintenance and replacement of the cleaning member require disassembly and become complex
Solution Approach 1:
The cleaning device is segmented from the fixing device by being mounted on the movable cover rather than being integrated into the fixed housing. This segmentation allows the cleaning device to be accessed by simply opening the cover, eliminating the need for complex disassembly while maintaining its cleaning function through the cover's movement mechanism.
Solution Approach 2:
The cleaning device is made dynamic by mounting it on the movable cover that can open and close. This dynamic positioning allows the cleaning device to be in two states: integrated with the fixing device during operation (when cover is closed) and accessible for maintenance (when cover is opened), thus resolving the contradiction between reliability and ease of repair.
2Ease of operation
If the cleaning member is accessible during operation, then maintenance work is easier, but the structure becomes more complex and may interfere with the conveying path
Solution Approach 1:
The movable cover serves multiple functions: it forms part of the conveying path during operation, provides protection for internal components, and enables access to the cleaning device for maintenance. By making the cover multi-functional, the structure remains simple without requiring additional access mechanisms, thus achieving ease of maintenance without increasing complexity.
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
Enables easy maintenance and management of the cleaning member by allowing the cleaning device to be accessed and replaced outside the fixing device, improving workability and reducing the risk of damage during cleaning.
Implementation Method 1
The fixing member is configured to heat a toner on a medium while rotating
Implementation Method 2
The cleaning device is configured to bring a cleaning member into contact with a surface of one of the fixing member and the pressing member and to clean the surface
Data Source
AI summary
A fixing device includes a fixing member, a pressing member, a cover and a cleaning device. The fixing member is configured to heat a toner on a medium while rotating. The pressing member is configured to form a pressing area with the fixing member while rotating and to press the toner on the medium passing through the pressing area. The cover is configured to be moved in one direction in an opening and closing direction to form a part of a conveying path for the medium and to be moved in the other direction in the opening and closing direction to open the part of the conveying path. The cleaning device is provided in the cover and configured to bring a cleaning member into contact with a surface of the fixing member in a state where the cover is moved in the one direction and to clean the surface.