Detachable Process Unit Layout for Easier Printer Maintenance
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Solution Overview
Problem
The maintainability of process cartridges in existing image forming apparatuses is insufficient due to their attachment and detachment through small opening portions exposed to the outside, which compromises ease of maintenance.
Innovation Solution
The image forming apparatus features an opening-and-closing member that allows the process unit to be attached and detached through an opening portion, with the supply portion positioned on the same side as the sheet supporting portion and the opening portion on the opposite side, enhancing maintainability by facilitating access for toner replenishment without fully exposing the process cartridge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the process cartridge is attached to and detached from the apparatus body through a small opening portion exposed to the outside, then the structure is simplified, but the maintainability for the process cartridge becomes insufficient
Solution Approach 1:
The invention divides the access path into two segments: the process cartridge is attached/detached through a first opening portion, while toner replenishment is accessed through a second opening portion. This segmentation allows each operation to have dedicated access points, improving maintainability without significantly complicating the overall structure.
Solution Approach 2:
The invention introduces a discharging tray as an intermediary component that can be opened to provide access to the process cartridge. This intermediary mechanism facilitates maintenance operations by creating a larger access pathway without requiring fundamental structural changes to the cartridge attachment system.
2Device complexity
If the process cartridge is attached to and detached from the apparatus body through a small opening portion, then the apparatus body structure is simplified, but the ease of operation for maintenance is reduced
Solution Approach 1:
The invention segments the maintenance operations into two distinct access paths: one for process cartridge attachment/detachment and another for toner replenishment. This segmentation improves ease of operation by providing dedicated access points for each function, reducing the complexity of maintenance procedures.
Solution Approach 2:
The invention utilizes the vertical dimension by positioning the discharging tray at the top of the apparatus body, allowing access to the process cartridge from above. This dimensional approach simplifies maintenance operations by providing a convenient access angle without complicating the horizontal structure of the apparatus body.
Data Source
AI summary
An image forming apparatus includes an apparatus body including an opening portion, and an opening-and-closing member, a process unit detachably attached to and supported by the apparatus body, the process unit including an image bearing member, a toner storage portion, and a supply portion, a sheet supporting portion, and a rotary feeding member. When viewed in a gravity direction, the supply portion is disposed on a same side as a side on which the sheet supporting portion is disposed with respect to the image bearing member, and the opening portion is disposed on a side opposite to the side on which the sheet supporting portion is disposed with respect to the image bearing member. In a case where the opening-and-closing member is positioned at an opening position, the process unit is configured to be attached to and detached from the apparatus body through the opening portion.