Sheet Feed Device Protruding Portion Extraction Mechanism
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Solution Overview
Problem
Existing sheet feed devices face challenges in preventing recording media from remaining inside the housing when the accommodating section is pulled out, especially when the recording medium comes into contact with a concave portion on the frame of the housing.
Innovation Solution
A sheet feed device is designed with an accommodating section that can be pulled out, featuring a concave portion with a concave shape toward the sheet feeding direction and a protruding portion on the accommodating section side, which protrudes relative to the concave portion when viewed from the front side to the back side in the pull-out direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a concave portion is provided in the frame of the housing to guide the recording medium, then the recording medium can be guided toward the outside, but the recording medium may still remain inside the housing when the accommodating section is pulled out before the bottom plate has completely descended
Solution Approach 1:
The guiding function is divided into two separate components: the concave portion in the housing frame and the protruding portion on the accommodating section. This segmentation allows each component to perform a specific function - the concave portion provides the guiding path while the protruding portion ensures complete extraction, preventing recording medium from remaining inside the housing.
Solution Approach 2:
The protruding portion acts as an intermediary element between the accommodating section and the concave portion. It protrudes into the concave portion to physically push the recording medium along the guiding path, ensuring that the recording medium is completely extracted from the housing when the accommodating section is pulled out.
2Productivity
If the accommodating section is pulled out quickly to improve productivity, then processing time is reduced, but the recording medium may come into contact with the concave portion and remain inside the housing
Solution Approach 1:
The protruding portion is positioned in advance on the accommodating section to engage with the concave portion before the recording medium can come into contact with it. This preliminary positioning ensures that as the accommodating section is pulled out quickly, the protruding portion already guides the recording medium along the safe path, preventing it from remaining inside the housing.
Solution Approach 2:
The protruding portion extracts the recording medium from the potential harmful zone (the concave portion) by physically pushing it along the guiding path. This extraction action occurs simultaneously with the extraction of the accommodating section, allowing quick removal while ensuring complete extraction of the recording medium.
Data Source
AI summary
A sheet feed device includes an accommodating section that is provided so as to be pulled out in a pull-out direction intersecting a sheet feeding direction of a housing and that accommodates a recording medium; a concave portion that is provided with a concave shape toward the sheet feeding direction of the recording medium on a front side in the pull-out direction; and a protruding portion that is provided on the accommodating section side so that a member protrudes relative to the concave portion when the concave portion is viewed from the front side to a back side in the pull-out direction.