Fixing Device Shutter Link Layout in Fan-Circuit Airflow Path
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Solution Overview
Problem
Conventional image-forming apparatuses require a novel layout for the link connected to the shutter to prevent interference with the sheet conveying path while ensuring the shutter operates efficiently.
Innovation Solution
The link is positioned between a circuit board and a fan, utilizing the airflow path created by the fan to efficiently arrange the link without obstructing the sheet conveying path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the link is positioned outside the conveying path to avoid interfering with sheet conveyance, then sheet conveyance is ensured, but the layout becomes complex due to multiple parts positioned outside the conveying path
Solution Approach 1:
The link is repositioned from the conventional space outside the conveying path to the airflow path dimension between the circuit board and fan. This dimensional relocation allows the link to occupy unused spatial resources, achieving a compact layout without interfering with sheet conveyance while reducing overall device complexity
Solution Approach 2:
The airflow path between the circuit board and fan serves dual purposes: it maintains proper airflow for cooling/electronic function and simultaneously provides optimal positioning space for the link mechanism. This multi-functional use of space resolves the layout complexity issue
2Device complexity
If the link is positioned in the airflow path between circuit board and fan, then layout efficiency is improved, but potential interference with airflow or component operation must be avoided
Solution Approach 1:
The link is positioned in a specific localized region within the airflow path where it does not obstruct overall airflow. The local placement optimizes the use of available space while maintaining proper air circulation for cooling and electronic component operation
Solution Approach 2:
The airflow path acts as an intermediary space that accommodates the link mechanism without compromising the primary functions of the circuit board and fan. This intermediate zone provides a buffer that allows the link to operate without directly interfering with critical components
Data Source
AI summary
An image-forming apparatus includes a housing, a fixing device, a shutter, a link, a circuit board, and a fan. The fixing device includes a heating unit and is configured to thermally fix a toner image to a sheet conveyed in a conveying direction. The shutter is movable relative to the fixing device between a closing position for closing an upstream end of the heating unit in the conveying direction and an opening position for exposing the upstream end of the heating unit. The link is connected to the shutter, and is configured to abut on a cartridge, which is detachably attachable to the housing, to move the shutter between the closing position and the opening position. The circuit board and the fan are spaced apart from each other to provide an airflow path through which air flows. The link is positioned between the circuit board and the fan.