Developing Unit Drive Switching to Prevent Toner Accumulation
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Solution Overview
Problem
Existing image forming apparatuses face issues with toner accumulation leading to image defects due to toner adhering to the photosensitive drum and transfer belt, which are exacerbated by the need for additional space and increased cost from dedicated vibration generators.
Innovation Solution
The apparatus incorporates a drive transmitter that switches between conveying toner and vibrating a preventer within the developing device, using a drive mechanism to transmit driving force for toner conveyance and apply vibration to prevent toner scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated vibration generator is added to suppress toner accumulation, then image quality is improved, but apparatus size and cost increase
Solution Approach 1:
The drive transmitter is designed to perform multiple functions: it conveys toner during normal operation and generates vibration to prevent toner accumulation during idle periods. This multi-functionality eliminates the need for a separate dedicated vibration generator, thereby suppressing toner accumulation while maintaining apparatus size and cost efficiency
Solution Approach 2:
The invention merges the toner conveyance function and the vibration generation function into a single drive transmitter component. By combining these two previously separate functions into one component, the apparatus avoids the need for additional dedicated vibration generation components, thus preventing increases in apparatus size and cost while effectively suppressing toner accumulation
2Productivity
If toner conveyance is continuous, then productivity is improved, but toner accumulation and image defects occur
Solution Approach 1:
The drive transmitter operates in periodic cycles: during idle periods when toner conveyance is not needed, it generates vibration to prevent toner accumulation. This periodic switching between conveyance mode and vibration mode ensures that toner does not accumulate and cause image defects, while maintaining high productivity during actual conveyance operations
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 approach effectively suppresses toner accumulation and associated image defects while maintaining apparatus size and cost efficiency by integrating a drive transmitter that alternates between conveying and vibrating operations to manage toner distribution.
Implementation Method 1
a drive transmitter that transmits a driving force to a toner conveyor that conveys the toner
Implementation Method 2
a second operation of vibrating a preventer that is provided in the developing device and prevents the toner from scattering
Data Source
AI summary
An image forming apparatus includes a developing device that develops a latent image by causing toner to adhere to the latent image via a toner carrier disposed opposite a latent image carrier on which the latent image is formed. The developing device includes a drive transmitter that transmits a driving force to a toner conveyor that conveys the toner, and the drive transmitter performs switching between a first operation of transmitting the driving force for conveying the toner to the toner conveyor and a second operation of vibrating a preventer that is provided in the developing device and prevents the toner from scattering.