Developing Roller Toner Catching Vibration for Deposition Control
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Solution Overview
Problem
In electrophotographic image forming apparatuses, toner deposition around the developing roller and magnetic roller leads to image failures due to suspended toner, which existing countermeasures like airflow and vibration do not adequately address, especially at high processing speeds.
Innovation Solution
A developing device with a toner catching support member and vibration generating means, where the toner catching member is vibrated to effectively catch and remove toner drops from the developing roller, preventing deposition and ensuring smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the toner stirring member is rotated at high speed to cope with increased processing speed, then productivity is improved, but suspended toner is generated around the developing roller and magnetic roller, leading to toner deposition and image failures
Solution Approach 1:
The patent applies vibration to the toner catching member to prevent toner deposition. The vibration generates oscillating motion that dislodges suspended toner particles from the developing roller surface and prevents them from adhering to surrounding components, thereby eliminating the harmful effect of suspended toner while maintaining high processing speeds
Solution Approach 2:
The patent introduces a toner catching member as an intermediary component between the developing roller and the surrounding environment. This member acts as a mediator that intercepts and collects suspended toner particles before they can deposit on critical components like the ear-cutting blade, thus resolving the contradiction between high-speed operation and toner suspension
2Object-generated harmful factors
If existing countermeasures like airflow or vibration are applied to remove suspended toner, then toner deposition is reduced, but they do not adequately address the problem at high processing speeds
Solution Approach 1:
The patent employs vibration of the toner catching member as a more effective mechanism compared to conventional airflow methods. The mechanical vibration directly作用于 the toner particles and the catching member surface, providing stronger and more reliable toner removal capability that remains effective even at high processing speeds where conventional methods fail
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 effectively suppresses toner deposition, reducing the risk of image failures by ensuring efficient toner removal and maintaining apparatus performance even at high speeds.
Implementation Method 1
The vibration generating means vibrates the toner catching member
Data Source
AI summary
A developing device includes a developing roller, toner supplying roller, regulation blade, and casing. The developing roller faces an image carrier on which an electrostatic latent image is to be formed, and supplies toner to the image carrier. The toner supplying roller faces the developing roller, and supplies the toner to the developing roller. The regulation blade faces the toner supplying roller at predetermined distance. The casing houses the developing roller, toner supplying roller, and regulation blade. The casing includes a toner catching support member facing the developing roller or the toner supplying roller between the regulation blade and the image carrier. The developing device further includes a toner catching member, which is arranged along a longitudinal direction of the toner catching support member and catches toner that drops from the developing roller, and a vibration generating portion, which vibrates the toner catching member.