Detector Posture Adjustment for Sheet Feeding Impact Reduction
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Solution Overview
Problem
The existing sheet feeding devices face issues with impact reduction when switching between mounted and pulled-out states, as the detector can become caught or damaged due to collisions with the sheet feeding cassette or paper sheets, leading to inefficient movement and potential damage.
Innovation Solution
The implementation of a detector with a first member that changes posture upon contact with the sheet feeding cassette or paper sheet, supported by a second member that allows up-and-down movement, reduces impact by adjusting its angle and position to smoothly transition between states, incorporating a guide portion that contacts the cassette or sheet to facilitate smooth movement and accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detector is made to contact the paper sheet for detection, then the detection function is achieved, but the detector becomes vulnerable to impact and damage during cassette insertion/removal
Solution Approach 1:
The detector is designed with movable components that can dynamically change position and orientation. The first member rotates about a first axis, and the second member rotates about a second axis, allowing the detector to adapt its configuration based on whether the cassette is being inserted, removed, or is in the mounted state, thereby avoiding impact during transitions while maintaining detection capability when mounted.
Solution Approach 2:
The detector structure includes built-in movement capabilities that allow it to anticipate and prepare for potential impact during cassette insertion or removal. By detecting the approach of the cassette corner and preemptively moving to a protected position, the detector avoids direct impact before it occurs.
2Ease of operation
If the guide portion makes contact with the cassette corner to guide detector movement, then the detector can move onto the paper sheet, but the detector may become caught on the cassette corner causing impact
Solution Approach 1:
The guide portion is designed to work in conjunction with the movable detector structure. As the cassette corner approaches, the guide portion initially contacts it to guide movement, but the detector simultaneously rotates on its first and second axes to adjust its position, allowing smooth transition onto the paper sheet without getting caught or experiencing impact.
3Strength
If the detector structure is made robust to withstand impact, then durability improves, but the complexity and size of the detector increases
Solution Approach 1:
Instead of making the detector structure robust and rigid to withstand impact, the invention uses a dynamic approach where the detector can move and reposition itself. This includes rotation about a first axis and a second axis, allowing the detector to avoid impact entirely through controlled movement rather than relying on structural strength, thereby reducing overall complexity.
Data Source
AI summary
A detector includes a first member that makes contact with an upper surface of a paper sheet stored in a sheet feeding cassette, and a second member that supports the first member such that it is capable changing postures, while also movably supporting the first member in an up-and-down direction to coincide with the upper surface of a paper sheet stored in the sheet feeding cassette. The first member has a guide portion that makes contact with the sheet feeding cassette and/or a paper sheet stored in the sheet feeding cassette. The first member changes postures with respect to the second member as a result of the guide portion making contact with the sheet feeding cassette and/or a paper sheet stored in the sheet feeding cassette.