Overload Limiter and Rotation Detector for Cleaning Member Drive
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Solution Overview
Problem
Existing driving devices for cleaning members in image forming apparatuses lack effective mechanisms to detect and respond to abnormal stops, leading to potential damage and inefficiencies in the cleaning process.
Innovation Solution
A driving device with an overload limiter and rotation detector is introduced, which generates force for moving the cleaning member and includes a torque limiter to prevent excessive force transmission, allowing for detection of abnormal stops and automatic recovery mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an overload limiter is added to the transmission unit, then the reliability of the cleaning member is improved by preventing excessive force, but the device complexity increases due to additional components
Solution Approach 1:
The overload limiter acts as an intermediary component between the drive source and the cleaning member. It mediates the force transmission by interrupting the transmission when excessive force is detected, thereby protecting the cleaning member while maintaining a relatively simple overall structure.
Solution Approach 2:
The overload limiter is designed to automatically interrupt force transmission when the cleaning member encounters excessive resistance or abnormal conditions. This self-activating mechanism eliminates the need for complex external monitoring systems, improving reliability without significantly increasing device complexity.
2Productivity
If a rotation detector is added to detect abnormal stops, then the productivity is improved through automatic recovery, but the device complexity increases due to additional detection mechanisms
Solution Approach 1:
The rotation detector provides feedback information about the rotational state of the cleaning member to the control unit. This feedback enables the system to detect abnormal stops and trigger automatic recovery operations, improving productivity through intelligent control without requiring complex mechanical recovery mechanisms.
Solution Approach 2:
The patent replaces complex mechanical recovery mechanisms with an electronically controlled system. The rotation detector and control unit work together to detect abnormalities and automatically restart the cleaning member, substituting mechanical complexity with simpler electronic control.
3Manufacturing precision
If the transmission unit includes an overload limiter, then the manufacturing precision is improved by preventing damage, but the ease of manufacture decreases due to additional assembly steps
Solution Approach 1:
The driving device is segmented into distinct functional modules: the drive source, the transmission unit with overload limiter, and the cleaning member. This segmentation allows the overload limiter to be designed as a standardized, pre-assembled component that can be easily integrated into the transmission unit, reducing overall assembly complexity while maintaining protection functionality.
Data Source
AI summary
A driving device includes a drive source that generates a force for moving a cleaning member that cleans an elongated member while moving in a longitudinal direction of the elongated member; an overload limiter disposed between an input side and an output side of a transmission unit that transmits the force from the drive source to the cleaning member, the overload limiter interrupting transmission of the force if a magnitude of the force reaches a predetermined magnitude; and a rotation detector disposed in the transmission unit on an output side of the overload limiter, the rotation detector detecting rotation caused by the force.