Imaging Unit Cover Member Asymmetric Attachment Mechanism
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Solution Overview
Problem
In image forming apparatuses, such as printers, the cover member protecting the lever and connector is often forgotten or lost after detachment, leading to potential erroneous operation and damage.
Innovation Solution
An image forming apparatus with a locking member and cover member that moves between lock and release positions, allowing the cover member to be attached in a different direction, ensuring it is securely reattached before the imaging unit can be detached, thus preventing loss and misuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover member is provided to protect the lever member and connector, then the reliability of preventing erroneous operation is improved, but the ease of operation deteriorates because the cover member may be forgotten or lost after detachment
Solution Approach 1:
The patent merges the cover member with the imaging unit by providing a connecting part that attaches the cover member to the imaging unit. This combination ensures the cover member cannot be lost separately and must be reattached to the imaging unit to access the lever member and connector, thereby maintaining protection while improving ease of operation.
Solution Approach 2:
The connecting part is pre-designed with a structure that automatically engages with the imaging unit when the cover member is attached in the correct direction. This preliminary design ensures that the cover member is naturally guided back to its protective position, reducing the cognitive burden on the user and preventing forgetting.
2Ease of repair
If the cover member is made detachable for maintenance access, then the ease of repair is improved, but the reliability deteriorates because the cover member may be lost after detachment
Solution Approach 1:
By combining the cover member with the imaging unit through the connecting part, the patent ensures that the cover member remains associated with the imaging unit even when detached for maintenance. The connecting part acts as a retention mechanism that prevents complete separation and loss, while still allowing necessary access during repair operations.
Solution Approach 2:
The connecting part serves as an intermediary element between the cover member and the imaging unit. It provides a controlled interface that allows detachment for maintenance while maintaining a physical connection that prevents loss. The connecting part mediates between the need for access and the need for retention.
3Ease of manufacture
If the cover member is attached in a single direction, then the ease of manufacture is improved, but the reliability deteriorates because the cover member can be easily detached and lost
Solution Approach 1:
The connecting part employs an asymmetric attachment structure where the cover member can be attached in a specific direction but not easily removed in the opposite direction. This asymmetric design maintains manufacturing simplicity while significantly improving retention reliability, as the structure naturally resists detachment forces.
Solution Approach 2:
The connecting part incorporates a dynamic attachment mechanism that allows easy attachment in the forward direction but creates resistance to detachment in the reverse direction. This dynamic characteristic enables simple manufacturing while providing reliable retention during normal operation.
Data Source
AI summary
An image forming apparatus includes an imaging unit attachable/detachable at a predetermined position of an apparatus body. The imaging unit includes a locking member and a cover member. The locking member is configured so as to move between a lock position engaging with the apparatus body when the imaging unit is attached to the predetermined position and a lock release position releasing engaging with the apparatus body. The cover member is attached to/detached from the imaging unit in a first direction. The cover member has a connecting part making possible to be attached to the imaging unit in a second direction. When the cover member is attached to the imaging unit in the second direction, the connecting part moves the locking member from the lock position to the lock release position and the imaging unit becomes a state capable of being detached from the predetermined position.