Sheet Storage End Cursor Rotation Restriction Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing sheet storage devices in image forming apparatuses face challenges in accurately detecting the size of sheets, particularly when sheets of varying sizes are stored, leading to potential false detections and inefficiencies in sheet handling.
Innovation Solution
A sheet storage device with a rotatable end cursor that can switch between protruding and parallel postures, guided by a rail system and restricted by engagement recesses, allows for precise detection of sheet sizes by a detector, preventing false detections and accommodating sheets of maximum size without increasing device size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the end cursor is made slidable along the sheet feeding direction to detect sheet sizes, then the detection accuracy is improved, but the device complexity increases due to additional guide rails and rotation restriction mechanisms
Solution Approach 1:
The end cursor is designed to be rotatable between a first posture (protruding upward) and a second posture (parallel to bottom plate), allowing dynamic adjustment of its position and orientation. This rotational capability enables the cursor to adapt to different sheet sizes while maintaining detection accuracy, resolving the contradiction between measurement precision and device complexity.
Solution Approach 2:
A rotation restriction portion with a restriction piece and engagement recess acts as an intermediary mechanism between the end cursor and the guide rail. This intermediary component controls the rotation of the end cursor, ensuring it rotates only when needed and preventing unintended movement, thereby maintaining detection accuracy without excessive structural complexity.
2Reliability
If the end cursor is restricted from rotating freely to prevent false detections, then the reliability is improved, but the ease of operation deteriorates as the cursor becomes harder to adjust
Solution Approach 1:
The end cursor is designed with dynamic rotational capability restricted by the rotation restriction portion. The cursor can rotate freely when needed for adjustment but is prevented from rotating beyond the engagement recess boundaries, ensuring reliable detection while maintaining operational ease through controlled movement.
Solution Approach 2:
The rotation restriction portion changes the rotational parameter of the end cursor by allowing rotation within specific boundaries (between first and second postures) while preventing unlimited rotation. This parameter control ensures the cursor remains reliable for detection while staying easy to operate within its designated range.
3Adaptability or versatility
If the end cursor is allowed to rotate freely to accommodate sheets of maximum size, then the adaptability is improved, but the measurement precision deteriorates due to potential false readings
Solution Approach 1:
The end cursor incorporates dynamic rotation capability that is selectively restricted by the rotation restriction portion. This allows the cursor to adapt to different sheet sizes by rotating to appropriate positions while preventing rotation that would cause false readings, thereby maintaining both adaptability and measurement precision.
Solution Approach 2:
The rotation restriction portion with the restriction piece and engagement recess serves as an intermediary that mediates between the end cursor's rotational capability and the detection system's precision requirements. It allows rotation for adaptability while preventing excessive rotation that would compromise measurement precision.
Data Source
AI summary
A sheet storage device has a rotation restriction portion configured to restrict a rotation of an end cursor from a first posture to a second posture. The rotation restriction portion has: a restriction piece situated on the end cursor and configured to be brought into contact with a guide rail so as to restrict the rotation of the end cursor from the first posture to the second posture; and an engagement recess formed at a given position of the guide rail, the restriction piece being fitted in the engagement recess. The end cursor is allowed to rotate from the first posture to the second posture when the restriction piece is fitted in the engagement recess at the given position of the guide rail.