Image Reading Device Regulating Member for Color Measurement
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Solution Overview
Problem
Conventional image reading devices for color measurement of paper sheets fail to maintain constant angular orientation, leading to variations in distance between the colorimeter and the paper, which compromises color measurement accuracy.
Innovation Solution
An image reading device with a regulating member comprising rolling members and a pressing member, offset from the axis, to stabilize the paper's angular orientation between the colorimeter and a background member, ensuring constant distances and preventing image damage during measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional conveying rollers are used to transport the sheet of paper, then the sheet can be conveyed through the device, but the angular orientation of the sheet varies causing distance variation between the colorimeter and the sheet
Solution Approach 1:
A regulating member with rolling members acts as an intermediary between the conveying rollers and the color measurement position. This intermediary component suppresses angular orientation variations of the sheet during conveyance, ensuring the sheet maintains a stable angular orientation relative to the colorimeter while still allowing smooth transport through the device.
Solution Approach 2:
The rolling members in the regulating member change the physical state of sheet conveyance by transitioning from direct roller contact to rolling contact through controlled suppression points. This parameter change in the conveyance mechanism allows the sheet to be transported while maintaining stable angular orientation, resolving the contradiction between ease of conveying and measurement precision.
2Measurement precision
If the regulating member presses the sheet to stabilize angular orientation, then color measurement accuracy improves, but the sheet may be damaged or scratched
Solution Approach 1:
The regulating member replaces direct mechanical pressing with a rolling contact mechanism. Instead of using fixed pressing members that could scratch the sheet, the rolling members provide the necessary suppression force through rolling motion, significantly reducing the risk of sheet damage while maintaining stable angular orientation for accurate color measurement.
Solution Approach 2:
The contact mechanism changes from static pressing to dynamic rolling contact. This parameter change in the interaction between the regulating member and the sheet allows for effective angular orientation control while minimizing harmful effects on the sheet surface, as the rolling motion distributes pressure and avoids concentrated stress points that cause scratches.
3Stability of the object's composition
If multiple rolling members are used to regulate sheet movement, then angular orientation stability improves, but device complexity increases
Solution Approach 1:
The regulating member is segmented into multiple rolling members positioned at different locations. This segmentation allows each rolling member to independently suppress angular orientation variations at different points along the sheet, providing comprehensive stability control. The modular segmented structure achieves high angular orientation stability without creating an overly complex integrated mechanism.
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
The solution effectively maintains constant distances between the colorimeter and the paper, enhancing color measurement accuracy and preventing scratches, thereby improving the reliability of color measurement results.
Implementation Method 1
a regulating member that regulates movement of the sheet of paper... includes rolling members... configured to guide the sheet of paper
Implementation Method 2
a pressing member configured to press the first member and the second member against the guide member
Implementation Method 3
a first background member disposed opposite to the scanner and configured to reflect light emitted from the scanner... a second background member disposed opposite to the colorimeter and configured to reflect light emitted from the colorimeter
Data Source
AI summary
An image reading device includes: a scanner configured to read an image formed on a sheet of paper; a first background member configured to reflect light emitted from the scanner; a colorimeter configured to take a color measurement of the image; a second background member configured to reflect light emitted from the colorimeter; a guide member configured to guide the sheet of paper passing between the colorimeter and the second background member; and a regulating member configured to regulate movement of the sheet of paper, wherein the regulating member includes: a first member including a rolling member; a second member including a rolling member; and a pressing member configured to press the first member and the second member against the guide member, and the pressing member is disposed in a position offset from axes of the first member and the second member.