Developing Device Ribs for Integral Drum Unit Attachment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses face challenges in the ease of attachment and detachment of the image bearing unit and developing device to and from the main apparatus body, which can lead to difficulties in maintenance and operation.
Innovation Solution
The image forming apparatus incorporates a developing device with a first housing featuring ribs on its upper surface, which abut against the main apparatus body's casing during attachment and detachment, facilitating the integral attachment and detachment of the image bearing unit and developing device, thereby improving the ease of operation and preventing toner aggregation on the developing roller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image bearing unit and developing device are separately provided with coupling members for attachment, then the attachment and detachment operations become complex and difficult, but the structural stability and reliability of the connection are improved
Solution Approach 1:
The patent merges the image bearing unit and developing device into a single integral assembly that attaches to the main apparatus body as one unit. The housing of the developing device is integrated with the image bearing unit, eliminating the need for separate coupling members and reducing attachment complexity while maintaining connection reliability.
Solution Approach 2:
The integrated housing structure serves multiple functions: it houses both the developing device and image bearing unit, provides a unified attachment interface to the main apparatus body, and incorporates guide ribs that simultaneously guide attachment/detachment operations and prevent toner aggregation. This multi-functionality simplifies the overall attachment mechanism.
2Ease of operation
If the image bearing unit and developing device are integrally attached, then the attachment and detachment operations are simplified, but the reliability of maintaining proper alignment and preventing toner aggregation during operation may be compromised
Solution Approach 1:
The guide ribs protruding from the housing serve as intermediary elements that mediate between the integrated assembly and the main apparatus body. These ribs engage with corresponding recesses in the apparatus body to maintain proper alignment during attachment and detachment, while also serving to prevent toner aggregation by ensuring correct positioning of the developing roller relative to the image bearing surface.
Solution Approach 2:
The patent applies local quality by providing guide ribs at specific locations on the housing where alignment and toner aggregation prevention are most critical. The ribs are positioned to engage with corresponding features on the apparatus body at key attachment points, ensuring proper alignment without requiring complex structures throughout the entire housing.
Data Source
AI summary
An image forming apparatus includes: a drum unit having a photosensitive drum: a developing device having a developing roller that supplies toner to the image bearing member and a developer container that rotatably supports the developing roller; and a main apparatus body to which the drum unit and the developing device are detachably attached. The drum unit and the developing device are integrally attachable to and integrally detachable from the main apparatus body. The developer container includes a pair of ribs on an upper surface thereof at positions corresponding to opposite axial ends of the developing roller. The ribs abut against a casing part of the main apparatus body while the drum unit and the developing device are being integrally attached to and integrally detached from the main apparatus body.