Swingable Roller Cleaning Mechanism for Deformation Prevention
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Solution Overview
Problem
Conventional image forming apparatuses face challenges in maintaining the effectiveness of paper dust removing members due to deformation over time, leading to inadequate removal of paper dust from conveying rollers, which can result in image defects.
Innovation Solution
A roller cleaning mechanism that includes a cleaning member, a holder, a housing, and an urging member, where the holder is swingable and urged in the opposite direction of the conveying roller's rotation, allowing the cleaning member to contact the roller at different positions during rotation and halt, thereby preventing deformation and maintaining cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the paper dust removing member is constantly in contact with the conveying roller at the same position, then the cleaning function is maintained, but the paper dust removing member is deformed over time and loses contact force
Solution Approach 1:
The holder is designed to be swingable with respect to the housing about a swing shaft, allowing the cleaning member to dynamically adjust its contact position with the conveying roller. When the conveying roller rotates, the holder swings in the rotation direction to a cleaning position where the cleaning face contacts the roller. When halted, the urging member swings the holder to a retracted position where a different part of the cleaning member contacts the roller. This dynamic adjustment prevents constant contact at the same position, reducing deformation and maintaining contact force over time.
2Device complexity
If the cleaning member contacts the conveying roller at a fixed position, then the structure is simple, but the cleaning member deforms and cannot sufficiently remove paper dust
Solution Approach 1:
The holder is designed to be swingable with respect to the housing about a swing shaft, allowing the cleaning member to dynamically adjust its contact position with the conveying roller. When the conveying roller rotates, the holder swings in the rotation direction to a cleaning position where the cleaning face contacts the roller. When halted, the urging member swings the holder to a retracted position where a different part of the cleaning member contacts the roller. This dynamic adjustment prevents constant contact at the same position, reducing deformation and maintaining contact force over time.
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
The mechanism effectively prevents deformation of the paper dust removing member and maintains its cleaning capability over an extended period, ensuring reliable image formation by consistently removing paper dust from the conveying rollers.
Implementation Method 1
The urging member urges the holder in the direction opposite to the rotation direction of the conveying roller
Implementation Method 2
the cleaning member makes contact with, along the axial direction of, the conveying roller for conveying a sheet
Data Source
AI summary
A roller cleaning mechanism includes a cleaning member making contact with a conveying roller, a holder holding the cleaning member, a housing for the holder, and an urging member. The holder is supported on the housing swingably about a swing shaft parallel to the axial direction of a driving roller. The urging member urges the holder oppositely to the rotation direction of the conveying roller. When the conveying roller rotates, its rotative driving force keeps the holder at a cleaning position where a cleaning face of the cleaning member makes contact with the outer circumferential face of the conveying roller. When the conveying roller is halted, the urging force of the urging member keeps the holder at a retracted position where a part of the cleaning member different from the cleaning face makes contact with the outer circumferential face of the conveying roller.