Process Cartridge Lever Controls Outlet Shutter to Prevent Toner Scattering
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
When replacing an image forming unit in an image forming apparatus, existing systems inadvertently open and close shutters of other units, causing toner to scatter and dirty the surrounding areas.
Innovation Solution
The apparatus is designed with a mechanism where the lever of the process cartridge to be replaced can independently control its outlet shutter, preventing unnecessary opening or closing of other units' shutters, thereby reducing toner scattering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shutter open/close assembly opens or closes shutters of multiple process cartridges simultaneously, then the operation is simplified and可以快速完成, but toner scatters around non-replaced process cartridges and dirties the surrounding areas
Solution Approach 1:
The shutter control mechanism is segmented into individual process cartridge units. Each process cartridge has its own independently controllable shutter and lever, allowing selective opening/closing of only the specific shutter associated with the cartridge being replaced, rather than controlling multiple shutters simultaneously. This segmentation prevents toner scattering to other areas while maintaining ease of operation.
2Productivity
If the shutter of the process cartridge to be replaced is opened during replacement, then toner can be discharged, but toner scatters around the shutter area and dirties the surrounding components
Solution Approach 1:
A lever is introduced as an intermediary mechanism between the user's manual input and the shutter opening action. The lever provides a controlled, gradual opening motion that allows toner to be discharged in a controlled manner rather than suddenly, reducing scattering. The lever also positions the user's hand away from the toner discharge path, preventing direct contamination.
3Device complexity
If multiple shutters are controlled by a single assembly, then the device structure is compact, but it cannot selectively control individual shutters to prevent toner scattering
Solution Approach 1:
The unified shutter control assembly is divided into separate, modular units, with each unit dedicated to controlling the shutter of a specific process cartridge. Each module includes its own lever and shutter mechanism that can be independently operated. This segmentation maintains relative structural compactness while enabling selective control of individual shutters to prevent toner scattering to other areas.
Data Source
AI summary
An image forming apparatus includes a main body housing and a process cartridge demountable from the main-body housing. The process cartridge includes a drum cartridge and a toner cartridge. The drum cartridge includes a photosensitive drum, a drum cleaner, an outlet with an outlet opening, an outlet shutter, and a lever. The lever is pivotable between a first position at which the lever places the outlet shutter closing the outlet opening and a second position at which the lever places the outlet shutter opening the outlet opening. When the lever is located at the first position, the process cartridge is demountable from the main-body housing. When the lever is located at the second position, the process cartridge is disabled to be demounted from the main-body housing.