Developing Device Vibration Control for Toner Accumulation
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Solution Overview
Problem
Existing image forming apparatuses using electrophotographic technology face issues with toner scattering and accumulation on the housing of the developing device, leading to image defects due to inadequate vibration methods, which are either infrequent or user-dependent and inefficient.
Innovation Solution
A developing device equipped with a vibrator that is controlled by a hardware processor to vibrate the housing and remove adhered toner when no image is being formed, preventing toner from dropping onto the developer sleeve or photo-conductor drum during the image forming process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the developing device is vibrated by attaching and removing it, then toner adhered to the upper wall of the housing can be dropped, but the vibration operation varies depending on the user and may not be effective
Solution Approach 1:
The developing device automatically performs vibration to drop toner from the housing wall without requiring user intervention. The control unit activates the vibrator based on detection that no image is being formed, enabling the system to self-maintain and eliminate toner accumulation automatically.
Solution Approach 2:
The control unit monitors the image forming state and activates the vibrator when no image is being formed. This feedback mechanism ensures vibration occurs at the appropriate time to prevent toner spillage during image formation while avoiding unnecessary vibration during operation.
2Object-generated harmful factors
If the developing device is vibrated only once a day by attaching and removing it, then some toner can be dropped, but image defects can still occur if toner drops during the image forming process
Solution Approach 1:
The vibrator is activated before image formation begins (when no image is being formed) to drop accumulated toner from the housing wall in advance. This preliminary action prevents toner spillage during the critical image forming process, ensuring image quality while maintaining reliable operation.
3Reliability
If a vibrator is added to the developing device, then consistent and timely toner removal is achieved, but device complexity increases
Solution Approach 1:
The control unit automatically manages the vibrator operation based on the image forming state, eliminating the need for manual user intervention. This self-service approach ensures consistent and timely toner removal while simplifying the user interface and operational procedures.
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
This solution effectively reduces image defects by ensuring consistent and timely removal of toner from the housing, improving the reliability of the image forming process and reducing variations in vibration operations.
Implementation Method 1
a vibrator that vibrates the housing; and a hardware processor that controls the vibrator at a time when no image is being formed, with the housing mounted on an image forming apparatus, to vibrate the housing such that toner adhered inside the housing is dropped
Data Source
AI summary
A developing device includes: a housing that contains a developing agent; a vibrator that vibrates the housing; and a hardware processor that controls the vibrator at a time when no image is being formed, with the housing mounted on an image forming apparatus, to vibrate the housing such that toner adhered inside the housing is dropped.