Locking Device Prevents ADF Damage During Scanner Maintenance
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Solution Overview
Problem
Conventional image forming apparatuses face damage due to the automatic document feeding unit unintentionally rotating and colliding with objects when the image reading unit is rotated for maintenance, as both units are pivotally coupled and exposed simultaneously.
Innovation Solution
An image forming apparatus with a locking device that selectively exposes either the top of the image forming unit or the image reading unit, using a combination of levers, hook members, and elastic members to prevent simultaneous exposure and secure the automatic document feeding unit to either the image reading unit or the image forming unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the image reading unit is pivotally coupled to the upper portion of the image forming unit to enable maintenance access, then the top of the image forming unit can be exposed for maintenance work, but the automatic document feeding unit may unintentionally rotate and collide with objects causing damage
Solution Approach 1:
The locking device is activated before rotating the image reading unit to expose the top of the image forming unit. The locking protrusion engages with the locking recess in advance, securing the automatic document feeding unit to prevent unintentional rotation and collision during maintenance operations
Solution Approach 2:
The locking device acts as an intermediary mechanism between the image reading unit and the automatic document feeding unit. It mediates the relationship by providing a controlled connection through the locking protrusion and locking recess, allowing maintenance access while preventing damage
2Adaptability or versatility
If the automatic document feeding unit is pivotally coupled to the upper portion of the image reading unit to enable document feeding, then thick documents or piles can be read, but both tops cannot be simultaneously exposed for maintenance
Solution Approach 1:
Before rotating the image reading unit to expose the top of the image forming unit for maintenance, the locking device is activated to secure the automatic document feeding unit. This preliminary action ensures that the document feeding capability is preserved while enabling maintenance access
Data Source
AI summary
A printing apparatus and an image forming apparatus are provided. The printing apparatus includes a printing unit to form an image on a printing medium, a scanning unit pivotally coupled to the printing unit, and a cover unit pivotally coupled to the scanning unit and having a pressing portion. The printing apparatus includes a first member rotatably mounted to the scanning unit to latch the scanning unit to the printing unit when the cover unit is in an open state with respect to the scanning unit, and a second member mounted to the scanning unit to rotate the first member to unlatch the scanning unit from the printing unit when pressed by the pressing portion of the cover unit moving from the open state to a closed state with respect to the scanning unit.