Charging Device Electrode Cleaning via Rotating Spiral Drive
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Solution Overview
Problem
Existing charging devices for image forming apparatuses face challenges in effectively cleaning electrodes while maintaining stability and reducing component complexity, leading to potential misalignment and separation issues during the cleaning process.
Innovation Solution
A charging device with a movable member that includes a first and second pressed portion, positioned to be pressed by a rotating shaft's protruding portion, allowing for axial movement and stable cleaning of electrodes, while minimizing component count and complexity by integrating the cylindrical portion to prevent displacement and tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable member with cleaning member is used to clean the electrode, then cleaning effectiveness is improved, but misalignment and separation issues occur during operation
Solution Approach 1:
The patent introduces a rotating member with a spiral protruding portion as an intermediary mechanism between the movable member and the driving force. The spiral protruding portion engages with pressed portions on the movable member, providing a reliable transmission mechanism that prevents misalignment and separation while enabling the movable member to move along the electrode for effective cleaning.
2Device complexity
If the movable member is designed with simple structure, then device complexity is reduced, but stability during cleaning operation deteriorates
Solution Approach 1:
The patent employs a dynamic rotating member with spiral protruding portion that circumferentially rotates to drive the movable member. This dynamic mechanism provides stable axial movement of the cleaning member along the electrode while maintaining a relatively simple overall structure with fewer components compared to traditional linear actuation systems.
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 solution ensures stable and efficient cleaning of electrodes with reduced risk of misalignment and separation, enhancing the operational reliability and simplicity of the charging device.
Implementation Method 1
a rotating member that is disposed along the electrode, includes a spiral protruding portion on an outer circumferential surface thereof, and circumferentially rotates
Implementation Method 2
The second pressed portion is pressed by the protruding portion. Upon receiving driving power from the rotating member, the movable member moves in the axial direction of the rotating member
Implementation Method 3
a cleaning member that moves along the electrode and cleans the electrode
Data Source
AI summary
A charging device includes an electrode, a cleaning member that moves along the electrode and cleans the electrode, a rotating member that is disposed along the electrode, includes a spiral protruding portion on an outer circumferential surface thereof, and circumferentially rotates, and a movable member to which the cleaning member is attached. The movable member includes a first through hole through which the rotating member passes, a first pressed portion that is provided on an inner circumferential surface of the first through hole and pressed by the protruding portion of the rotating member, and a second pressed portion that is disposed at a different position from a position of the first pressed portion in an axial direction of the rotating member and that is disposed such that one or more turns of the protruding portion are positioned between the second pressed portion and the first pressed portion.