Document Reading Device Separate Opening Parts for Jam and Cleaning
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Solution Overview
Problem
In document reading devices, the operation for clearing document jams and cleaning the reading surface can be confused, leading to potential image defects due to the need to open and close the same opening and closing part for both functions, which can result in the moving part being closed at an exposing position unintentionally.
Innovation Solution
A document reading device is designed with a first opening and closing part to open the transport path for jam removal and a second opening and closing part to expose the moving part for cleaning, allowing separate operations and preventing the moving part from being closed at the exposing position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single opening and closing part is used for both jam clearance and reading surface cleaning, then the device structure is simplified, but the risk of operational confusion and image defects increases
Solution Approach 1:
The single opening and closing part is divided into two separate parts: a first opening and closing part for opening the transport path during jam clearance, and a second opening and closing part for exposing the reading surface during cleaning. This segmentation eliminates operational confusion while maintaining reasonable structural complexity.
2Ease of operation
If the opening and closing part is opened for cleaning, then the reading surface becomes accessible, but the moving part may be inadvertently closed at the exposing position
Solution Approach 1:
By separating the functions into two distinct opening and closing parts, the patent ensures that opening the first part for cleaning does not affect the position of the second part. This prevents the moving part from being inadvertently closed at the exposing position, maintaining positioning accuracy while ensuring accessibility.
3Device complexity
If the same opening and closing part is used for multiple functions, then the number of parts is reduced, but the risk of image defects increases
Solution Approach 1:
The patent divides the opening and closing function into two separate parts to eliminate the risk of image defects caused by operational confusion. The first part handles transport path opening without affecting the reading surface, while the second part handles reading surface exposure without risking unintended closure, thus preventing image defects.
Data Source
AI summary
A document reading device includes: a device body; a transport path that is provided in the device body and through which a document is transported; a reading unit that is provided in the device body, has a reading surface, and reads an image of a document transported through the transport path; a moving part that is provided in the device body and is capable of being moved to a covering position at which the moving part covers the reading surface and to an exposing position at which the moving part exposes the reading surface; a first opening and closing part that is provided on the device body so as to be opened and closed and opens the transport path, at a first opening position; and a second opening and closing part that is provided beside the device body so as to be opened and closed or so as to be removable and mountable and exposes the moving part, at a second opening position or a removal position.