Pivotable Lid Mechanism for Image Reading Apparatus
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Solution Overview
Problem
In existing image reading apparatuses, the open second ejection port can lead to reverse insertion of the second medium, causing overload and malfunction due to the inability to differentiate between the inlet and ejection ports for media of different widths.
Innovation Solution
An image reading apparatus with a pivotable lid that covers at least a portion of the first port, preventing reverse insertion by changing positions based on the type of medium being ejected, and utilizing a torsion coil spring for the opening and closing mechanism to ensure proper ejection without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the second ejection port remains open, then the device structure is simple, but reverse insertion of the second medium causes overload and malfunction
Solution Approach 1:
The lid is made pivotable between a first position (covering the first port) and a second position (covering the second port), allowing dynamic adaptation to different media types. This dynamic positioning prevents reverse insertion of the second medium into the first ejection port while maintaining structural simplicity through a single movable component.
2Reliability
If the lid covers the first port, then reverse insertion is prevented, but the second medium ejection may be interfered with
Solution Approach 1:
The lid pivots to the first position to cover the first port and prevent reverse insertion, then pivots to the second position to cover the second port and enable proper ejection of the second medium. This dynamic movement ensures both reverse insertion prevention and smooth ejection operation without interference.
Solution Approach 2:
The lid acts as an intermediary element that selectively blocks ports based on the medium type being processed. By positioning the lid to cover the appropriate port, it mediates between the conveying mechanism and the external environment, preventing reverse insertion while allowing controlled ejection.
3Adaptability or versatility
If different media of different widths are conveyed through the same ports, then the device is versatile, but the open ejection port allows reverse insertion causing overload
Solution Approach 1:
The lid dynamically positions itself based on the medium type being conveyed. When the first medium is processed, the lid is in the first position. When the second medium is processed, the lid pivots to the second position. This dynamic adaptation allows the device to handle different media widths while preventing reverse insertion overload through appropriate port coverage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents reverse insertion and ensures smooth ejection of both sheet and card media by adjusting the lid position according to the medium's width, reducing the risk of malfunction and maintaining device efficiency.
Implementation Method 1
utilizing a torsion coil spring for the opening and closing mechanism
Data Source
AI summary
An image reading apparatus includes a roller that rotates about a rotating axis and conveys a particular medium in a conveying direction, a reader that reads the particular medium, and a body. The body includes a first port formed in the body, and a lid pivotably attached to the body and pivots about a pivoting axis, which is perpendicular to the conveying direction and the rotating axis. The lid pivots between a first position, in which the lid covers at least a portion of the first port, and a second position, in which the lid is separated from the first port.