Developing Unit Drawer Linkage for Connector Operation
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Solution Overview
Problem
Existing image forming apparatuses face challenges in conveniently attaching or detaching developing units, which limits the efficient exchange and maintenance of these units within the apparatus.
Innovation Solution
The image forming apparatus incorporates a drawer system with a drive plate and connectors that allow the developing unit to be moved between contact and non-contact positions with the transfer unit, enabling easy installation, removal, and connection/disconnection of power and high-voltage sources in linkage with the drawer's opening/closing operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a drawer system is introduced to improve developing unit exchange convenience, then ease of operation is improved, but device complexity increases due to additional connectors and linkage mechanisms
Solution Approach 1:
The patent combines multiple connectors (coupling connector for drive source, CRUM connector for developing information, high-voltage connector) into a single integrated drawer assembly. When the drawer is pushed in or pulled out, all connectors are simultaneously connected or disconnected from the developing unit, simplifying the exchange operation while maintaining multiple functional connections.
Solution Approach 2:
The drawer structure serves multiple functions: it supports the developing unit, houses multiple types of connectors (electrical, mechanical coupling, data), and provides the linkage mechanism for simultaneous connection/disconnection. This multi-functionality reduces the need for separate mechanisms for each connector type.
2Ease of operation
If connectors are integrated into the drawer linkage system to enable automatic connection/disconnection, then ease of operation is improved, but reliability may worsen due to increased mechanical moving parts
Solution Approach 1:
The connectors are pre-positioned within the drawer assembly in predetermined locations. Before the drawer movement begins, the connectors are already aligned with their corresponding interfaces on the developing unit, ensuring that connection or disconnection occurs smoothly without misalignment or mechanical stress during the operation.
Solution Approach 2:
The linkage mechanism is divided into separate sections: the drawer body, the front cover with operating section, and the individual connectors (coupling connector, CRUM connector, high-voltage connector). Each connector can move independently within its designated path, reducing the risk that a failure in one connector affects the others.
3Ease of operation
If the front cover is designed to move independently of the tray over a first portion of the distance, then ease of operation is improved for connector disconnection, but device complexity increases due to the segmented movement mechanism
Solution Approach 1:
The linkage mechanism between the front cover and tray is designed to dynamically change its state. Over the first portion of the pulling distance, the front cover moves independently to disconnect connectors. Over the second portion, the front cover and tray move together as a unified assembly. This dynamic adaptation allows the system to optimize for connector disconnection when needed while maintaining structural simplicity when not in use.
Data Source
AI summary
An image forming apparatus includes installation/separation of a high-voltage connector to apply high-voltage current to a developing unit, a connector to transmit developing information, and a coupling connector to connect or disconnect a coupling to transmit power to rollers of the developing unit is performed as a drawer is pushed into or pulled out of a main body.