Removable Unit Cover Mechanism for Charging Device Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming apparatuses employing electrophotography face challenges in efficiently managing the attachment and removal of removable units, particularly the charging device, which requires manual handling and can lead to improper shielding of destaticizing light, potentially causing residual electric charge issues.
Innovation Solution
A removable unit design featuring a cover member that pivots between open and closed positions, utilizing a rib and restricting portion mechanism to automatically maintain the cover member in the correct position, ensuring proper shielding of destaticizing light and simplifying the attachment and removal process of the charging device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the cover member is made manually operable for simplicity, then the device complexity is reduced, but the reliability of proper shielding is compromised due to potential improper positioning
Solution Approach 1:
The cover member automatically positions itself through the interaction between the rib and restricting portion mechanism. When the charging device is installed or removed, the rib engages with the restricting portion to automatically move the cover member to the appropriate position, eliminating the need for manual operation and ensuring reliable shielding without adding complex control systems
Solution Approach 2:
The mechanical feedback mechanism through the rib and restricting portion provides automatic position control. The restricting portion detects the installation state and provides feedback force to position the cover member correctly, ensuring the shielding function is properly activated based on the actual operational state
2Reliability
If the cover member is automatically positioned to ensure proper shielding, then the reliability is improved, but the device complexity increases due to additional positioning mechanisms
Solution Approach 1:
The system uses the existing structural elements (rib and restricting portion) to automatically position the cover member without requiring separate actuation mechanisms. The automatic positioning is achieved through the natural mechanical interaction during charging device installation/removal, avoiding additional motors, sensors, or control systems
Solution Approach 2:
The positioning function is merged with the installation/removal operation of the charging device. The same mechanical action that installs or removes the charging device also automatically positions the cover member, combining multiple functions into a single operational sequence and reducing overall system complexity
3Ease of manufacture
If manual handling of the charging device is required, then the ease of manufacture is improved, but the ease of operation deteriorates due to potential improper shielding and residual charge issues
Solution Approach 1:
The system automatically manages the cover member positioning during charging device attachment and removal, eliminating the need for users to manually control the cover or understand the shielding requirements. The mechanical feedback mechanism handles the positioning automatically based on the installation state
Solution Approach 2:
The cover member is pre-positioned in the appropriate state before the user needs to perform any operation. When the charging device is installed, the cover member is already in the closed shielding position, and when removed, it automatically opens, eliminating the need for users to manually adjust or remember the correct cover position
Data Source
AI summary
A removable unit has a first unit removably attached to an image forming apparatus, a second unit held by being removably attached to the first unit, and a cover member. The cover member is supported pivotably on the first unit, and can be located selectively either in a first position overlapping, or a second position not overlapping, the attachment/removal path of the second unit. When the cover member pivots from the first position to a third position pivoted through a predetermined angle from the first position toward the second position, from the first unit a reaction force acts on the cover member to restrict its pivoting toward the second position and, when the cover member pivots from the second position to the third position, from the first unit a reaction force acts on the cover member to restrict its pivoting toward the first position.