Document Feeder Protruding Portion Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional document feeders in image-reading apparatuses face challenges in reducing document vibration during conveyance, which can lead to poor image quality, and attempts to mitigate this often result in obstructed conveyance.
Innovation Solution
A document feeder design featuring a protruding portion between the feed roller and conveying roller in the feed path, which can bend to accommodate varying document thicknesses and reduce vibration without obstructing the conveyance, utilizing a sheet-metal member for reduced wear and easy replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a biasing force is added to the document to reduce vibration, then document vibration is reduced, but document conveyance is obstructed
Solution Approach 1:
The protruding portion is designed to be movable rather than fixed, allowing it to dynamically adjust its position and contact with the document. This enables the protruding portion to provide vibration reduction only when needed, while maintaining smooth conveyance when the document passes without vibration issues.
Solution Approach 2:
The protruding portion is positioned specifically between the feed roller and conveying roller at a location where vibration occurs but does not interfere with the conveyance path. This localized intervention provides vibration reduction at the critical point without obstructing the overall conveyance flow.
2Object-affected harmful factors
If a protruding portion is added to reduce vibration, then document vibration is reduced, but the protruding portion wears out
Solution Approach 1:
The protruding portion is made from a material with changed physical parameters - specifically a softer material that can deform elastically. This material parameter change allows the protruding portion to conform to the document surface and reduce vibration through elastic deformation rather than rigid contact, significantly reducing wear.
Solution Approach 2:
The protruding portion is designed as a flexible element that can deform elastically when contacting the document. This flexibility allows the protruding portion to adapt to document thickness variations and reduce vibration through elastic deformation, while the flexible nature reduces mechanical wear compared to rigid structures.
3Object-affected harmful factors
If a rigid protruding portion is used, then vibration reduction is effective, but thicker documents cannot be conveyed
Solution Approach 1:
The protruding portion's movable design allows it to dynamically adjust its protrusion height based on document thickness. When thicker documents are conveyed, the protruding portion can retract or deform to accommodate the increased thickness, maintaining vibration reduction effectiveness across different document types.
Solution Approach 2:
The protruding portion is made from an elastic material that changes its physical state upon contact with documents of varying thickness. This elastic deformation allows the protruding portion to adapt to thicker documents like cards and cardboard while still providing vibration reduction, eliminating the need for multiple fixed-position protrusions.
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
Effectively reduces document vibration during conveyance, ensuring smooth and unobstructed document handling, even with thicker documents like cards or cardboard, while minimizing wear on the protruding portion.
Implementation Method 1
a protruding portion provided between the feed roller and the conveying roller in the feed path and protruding from a lower side of the feed path
Data Source
AI summary
A document feeder includes a feed roller provided in a feed path for a document, a conveying roller provided on a downstream side of the feed roller in the feed path, and a protruding portion provided between the feed roller and the conveying roller in the feed path and protruding from a lower side of the feed path.