Developing Device Cooling via Dynamic Positioning and Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses face inefficiencies in cooling the developing device due to increased space between heat dissipating portions and the developing tray, leading to reduced airflow and cooling efficiency when the developing device is in the separated position.
Innovation Solution
An image forming apparatus design featuring a moving mechanism, seal members, and a fan that allows airflow to pass along the mounting direction when the developing device is in the developing position, ensuring efficient cooling by maintaining optimal airflow and minimizing interference between heat dissipating portions and the developing tray.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If multiple heat dissipating portions are provided at the developer container to project toward the airflow space, then cooling efficiency is enhanced by increasing heat dissipation surface area, but the space between heat dissipating portions and developing tray must be increased to prevent interference during separated position, which further increases the space in developing position and reduces airflow rate through heat dissipating portions
Solution Approach 1:
The developing device is designed to be movable between a developing position and a separated position. The moving mechanism allows the developing device to dynamically change its position, enabling the heat dissipating portions to be close to the airflow space during development while preventing interference with the developing tray during separation. This dynamic positioning resolves the contradiction by making the spatial relationship adjustable rather than fixed.
Solution Approach 2:
The sealing structure is divided into a first seal member and a second seal member positioned at different locations. The first seal member seals between the heat dissipating portions and the developing tray, while the second seal member seals at another position. This segmentation allows independent control of sealing at different locations, enabling the heat dissipating portions to maintain optimal spacing for both cooling efficiency and airflow rate.
2Ease of repair
If the developing device is made dismountable for maintenance operations, then ease of maintenance is improved, but the space between heat dissipating portions and developing tray must be increased to accommodate movement, which reduces cooling efficiency
Solution Approach 1:
The developing device is designed with movable capability between developed and separated positions. This dynamic design allows the device to be easily removed for maintenance while maintaining optimal spacing between heat dissipating portions and the developing tray during operation, thus preserving cooling efficiency without compromising maintenance accessibility.
Solution Approach 2:
The moving mechanism acts as an intermediary that enables the developing device to transition between positions. It facilitates easy removal for maintenance while ensuring that during the developed position, the heat dissipating portions maintain optimal spacing for cooling, thus mediating between the conflicting requirements of maintenance accessibility and cooling efficiency.
3Reliability
If seal members are provided to prevent developer leakage between heat dissipating portions and developing tray, then reliability is improved, but device complexity increases due to additional sealing components
Solution Approach 1:
The sealing function is segmented into multiple seal members positioned at different locations. The first seal member is provided between the heat dissipating portions and the developing tray, while the second seal member is provided at another position. This segmentation allows targeted sealing at critical locations, ensuring reliable developer containment while minimizing the overall sealing structure complexity by placing seals only where necessary.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enhances cooling efficiency by maintaining optimal airflow and preventing interference between heat dissipating portions and the developing tray, even when the developing device is in the separated position, thereby stabilizing image formation and maintaining device performance.
Implementation Method 1
a fan configured to generate an airflow for cooling the developing device
Data Source
AI summary
An image forming apparatus includes an image bearing member, a developing device including a developer container and a developer carrying member, a mounting portion, a moving mechanism, a cover member, a wall member, a first seal member, a second seal member, and a fan. When the developing device is in a separated position, neither the first seal member or the second seal member contacts the wall member. When the developing device is in a developing position, both the first seal member and the second seal member contact the wall member. When the developing device is in the developing position, a space for permitting passing of an airflow by the fan is formed along a mounting direction by the cover member, the wall member, the first seal member, and the second seal member.