Scanner Document Cover Holding Angle for Low-Clearance Placement
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Solution Overview
Problem
Existing image recording apparatuses with a pressure plate configuration that does not allow for holding at a small angle to the document table glass plate result in poor usability when installed in spaces with limited overhead clearance, making it difficult to place documents efficiently.
Innovation Solution
The image recording apparatus incorporates a document cover that can be switched between closed and open states, with a holding mechanism that maintains a spacing of 3 cm to 10 cm and an angle of 5° to 20° between the placement surface and the document cover, allowing for easy document placement even in confined spaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pressure plate is configured to be largely opened without holding at a small angle, then the structure is simple, but the usability is poor when installed in locations with limited overhead space
Solution Approach 1:
The patent applies parameter changes by specifying a particular spacing range (3 cm to 10 cm) between the placement surface and document cover when opened, and an angle range (5° to 20°) between the document cover and placement surface. This quantitative parameter control enables the document cover to be held in a partially open position, improving usability in limited spaces while maintaining structural simplicity through the holding mechanism
2Ease of operation
If the document cover is held at a small angle (5° to 20°) with spacing (3 cm to 10 cm), then the usability is improved, but the mechanism complexity increases
Solution Approach 1:
The holding mechanism is designed to automatically maintain the document cover at the specified angle and spacing without requiring continuous external control. The mechanism self-regulates to keep the document cover in the optimal position for document placement, reducing the need for complex active control systems while improving ease of operation
Data Source
AI summary
An image recording apparatus includes a recording unit configured to record an image on a medium; a body apparatus configured to house the recording unit; a document reader disposed in an upper portion of the body apparatus and having a placement surface of a document placement table at which a document is placed; a document cover a state thereof is allowed to be switched between a closed state in which the document cover covers the placement surface from above and an open state in which the document cover is opened to expose a space above the placement surface; and a holding mechanism configured to hold the document cover in such a way that a spacing between the placement surface and the document cover in the open state is greater than or equal to 3 cm but smaller than or equal to 10 cm.