Swingable Roller Device for Cleaning Member Lifespan
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Solution Overview
Problem
Conventional roller devices with cleaning members suffer from reduced cleaning member lifespan and inability to perform cleaning operations during contact-pressure release, as the cleaning member maintains constant contact pressure regardless of the second roller's contamination level.
Innovation Solution
A roller device design where the second roller is swingable to adjust pressure on the first roller, allowing the cleaning member to change contact pressures with the second roller, enabling effective cleaning even during contact-pressure release operations and extending the cleaning member's lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cleaning member maintains constant contact pressure on the second roller, then the cleaning operation is consistent, but the life of the cleaning member is reduced
Solution Approach 1:
The patent applies the dynamics principle by making the second roller swingable between a first position (contacting the first roller) and a second position (contacting the cleaning member). This dynamic positioning allows the contact pressure between the cleaning member and second roller to vary based on the roller's position, rather than maintaining constant pressure. When the second roller is at the second position, the cleaning member can effectively clean the roller surface, and when at the first position, the cleaning pressure is reduced, extending the cleaning member's life.
2Stress or pressure
If the second roller performs contact-pressure release operation on the first roller, then the pressure on the first roller is reduced, but the cleaning member cannot perform cleaning operation
Solution Approach 1:
The patent resolves this contradiction by dynamically positioning the second roller. When contact-pressure release is needed on the first roller, the second roller swings to the second position to contact the cleaning member, ensuring cleaning operation can still be performed. The swing mechanism ensures that either the first roller or the cleaning member is contacted, but not both simultaneously with high pressure, thus maintaining cleaning capability during pressure release operations.
Data Source
AI summary
The cleaning member is disposed to be opposite to the first roller with the second roller being provided therebetween. Compared to a case when the second roller is placed at a first position on a side of the first roller, if the second roller is placed at a second position on a side of the cleaning roller, a pressure between the second roller and the first roller becomes smaller, and a pressure between the second roller and the cleaning member becomes larger.