Charger Positioning Adjuster for Image Concentration Deviation
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Solution Overview
Problem
High-speed electrophotographic image forming apparatuses face challenges in maintaining uniform image charging due to deviations in the distance between corona chargers and image carriers, which affect image concentration, and existing solutions require complex drive systems and additional installation space.
Innovation Solution
A charger positioning adjuster that includes a mounting part, a positioning member, and a spacer to adjust the distance between the charger and the image carrier, allowing for detachable attachment and adjustment without an electric drive source, thereby reducing deviations and enhancing image concentration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If an electric drive source is used to automatically control the distance between charger and image carrier, then the deviation of surface electric potentials is reduced, but the device complexity and installation space increase
Solution Approach 1:
The invention extracts and removes the electric drive source and drive transmission system from the charger positioning mechanism. Instead of using motor-driven adjustment, the patent employs a simple mechanical positioning structure where the charger is detachably attached to the mounting part at predetermined positions, eliminating complex drive systems while maintaining positioning accuracy.
Solution Approach 2:
The invention segments the charger positioning into discrete detachable attachment positions on the mounting part. The charger can be attached at multiple predetermined positions along the main scanning direction, allowing selection of optimal positions to reduce surface potential deviation without requiring continuous adjustment mechanisms or drive systems.
2Manufacturing precision
If an electric drive source is used to adjust charger position, then image concentration deviation is reduced, but the installation space increases
Solution Approach 1:
The invention removes the electric drive source and its associated transmission components from the system. The charger positioning is achieved through a compact mechanical structure with detachable attachment points on the mounting part, eliminating the need for motors, gears, or other space-consuming drive mechanisms.
Solution Approach 2:
The mounting part is designed with multiple predetermined attachment positions segmented along the main scanning direction. This segmentation allows the charger to be positioned at discrete locations without requiring continuous adjustment mechanisms, thereby reducing the space needed for positioning components while maintaining image concentration uniformity.
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 provides a simpler, space-saving configuration that effectively reduces deviations in the main scanning direction, improving image concentration and surface potential uniformity without the need for an electric drive source, thus enhancing the overall image forming process.
Implementation Method 1
a charger that is disposed facing an image carrier and uniformly charges a surface of the image carrier using corona discharging
Data Source
AI summary
A charger positioning adjuster, which is included in an image forming apparatus and disposed facing a charger uniformly charging a surface of an image carrier using corona discharging, includes a mounting part provided at a position on which the charger is detachably attached, a positioning member attached to the mounting part and positioning the charger by contacting thereto, and a spacer disposed between the mounting part and the positioning member and adjusting a distance between the surface of the image carrier and the charger.