Image Forming Device Door Lock Mechanism
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Solution Overview
Problem
Conventional image forming devices face complexity and increased parts when attempting to maintain the door in a closed state during operation while allowing for easy positioning and detachment of the image forming unit, leading to potential displacement issues.
Innovation Solution
The design incorporates a simplified structure using a support shaft and lock member with inclined surfaces to maintain the image forming unit's position and ensure the door remains closed, reducing the number of components and enhancing positional accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock mechanism is provided to maintain the door in a closed state during operation, then the door can be maintained in a closed state, but the number of parts and components increases and configuration becomes more complex
Solution Approach 1:
The lock mechanism is merged with the door structure itself. The lock shaft is provided on the door, and the lock lever is attached to the door, making them integral parts of the door assembly rather than separate components. This integration reduces the number of parts while maintaining the door closed state during operation.
Solution Approach 2:
The lock lever serves multiple functions: it locks the door in the closed state during operation, and it also serves as a supporting point for the door when it is open. This multi-functionality reduces the need for additional separate components, thereby reducing overall device complexity.
2Manufacturing precision
If a mechanism for positioning the image forming unit is provided in association with the door, then the image forming unit can be positioned at a prescribed location, but the number of parts and components increases and configuration becomes more complex
Solution Approach 1:
The positioning function is merged with the door structure. The support shaft is provided on the door, and the image forming unit is supported by this shaft. This integration allows the door to serve dual purposes: positioning the image forming unit when open, and locking it in place when closed, without requiring separate positioning mechanisms.
Solution Approach 2:
The door itself provides the positioning function through its own structure. The support shaft on the door automatically positions the image forming unit when the door is open, and the lock mechanism automatically maintains the closed state when the door is closed. This self-service approach eliminates the need for additional positioning components.
Data Source
Figure 1(A)~1(B)
Figure 2(A)~2(B)
Figure 3
AI summary
An image forming device having a frame, a door, and a movable image forming unit to be assembled in the frame when the door is open. Positioning of the image forming unit relative to the frame and a closing position of the door are maintainable when the door is closed. When the door is closed, a hook at the door side is engaged with a hook of a lock unit at the frame side. The lock unit is movable in association with the movement of the door to its closed position to move a pressure portion, so that a part of the image forming unit is pressed by the pressure portion for positioning.