Developing Device Closing Member Retention Mechanism
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Solution Overview
Problem
Existing developing devices face issues with the closing member coming out of the pull-out hole portion when the loosening member is pulled out, leading to potential contamination and operational inefficiencies.
Innovation Solution
A developing device design that includes a storage portion with a limiting portion in the hole portion to catch the caught portion of the closing member, preventing it from moving in the pull-out direction of the loosening member, and utilizing a sealing clip with low-elastic and high-elastic portions to clean and close the pull-out hole effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the closing member is disposed in the pull-out hole portion to close the hole after the loosening member is pulled out, then the hole can be effectively closed and cleaned, but the closing member may come out of the pull-out hole portion during the pull-out process
Solution Approach 1:
The limiting portion is designed to preemptively prevent the closing member from coming out during the pull-out operation. By providing a structural constraint before the problem occurs, the design eliminates the risk of closing member ejection while maintaining smooth loosening member extraction.
Solution Approach 2:
The closing member is pre-positioned in the pull-out hole portion and the limiting portion is pre-configured to engage with the caught portion. This preliminary arrangement ensures that when the loosening member is pulled out, the closing member is already in place to close the hole, preventing contamination before it can occur.
2Reliability
If the closing member moves in the pull-out direction during loosening member extraction, then the closing mechanism may fail, but adding constraints to prevent movement may complicate the structure
Solution Approach 1:
The hole portion is segmented into functional regions: the limiting portion that prevents closing member ejection, the pull-out path for the loosening member, and the closing region. This segmentation allows each component to perform its specific function without requiring complex overall structure.
Solution Approach 2:
The limiting portion acts as an intermediary structure between the pull-out hole and the external environment. It mediates the movement of the closing member by providing a mechanical stop (caught portion engagement) that prevents excessive movement while allowing the closing member to perform its sealing function.
Data Source
AI summary
A developing device includes: a storage portion that stores a developer and has an exit for the developer and a hole portion, the hole portion including a limiting portion; a sealing member with which the exit of the storage portion is sealed; a loosening member that is disposed in the storage portion so as to be pulled out through the hole portion of the storage portion and loosens the developer by being pulled out of the storage portion; and a closing member that is disposed in the hole portion of the storage portion, cleans the loosening member that is pulled out of the hole portion by being in contact with the loosening member, and closes the hole portion of which the loosening member has been pulled out, the closing member including a caught portion. The limiting portion of the hole portion of the storage portion limits a movement of the closing member in a pull-out direction of the loosening member by catching the caught portion.