U-Shaped Scanner Carriage Ribs Reduce Tilting
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Solution Overview
Problem
Existing scanner carriage tilt preventing devices create excessive friction when engaging the guide wire or track, leading to carriage jams and malfunctions due to their flat surface design, which results in undesirable tilting angles.
Innovation Solution
A U-shaped anti-tilting device with inwardly facing ribs on the free leg, which reduces the contact surface area with the guide wire or track, minimizing static friction and preventing tilting while maintaining stable carriage movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flat surface design is used to engage the guide wire or track, then the contact surface area is large providing stable engagement, but excessive friction is created leading to carriage jams
Solution Approach 1:
The flat contact surface is segmented into multiple discrete ribs that engage the guide wire or track at separate points. This segmentation reduces the total contact area while maintaining engagement stability through distributed contact points, thereby reducing friction and preventing carriage jams.
Solution Approach 2:
Instead of a uniform flat surface, the engagement interface is modified with localized rib structures that concentrate contact at specific points. This local quality change reduces overall friction while maintaining stable engagement at the rib contact points with the guide wire or track.
2Object-generated harmful factors
If the contact surface area with the guide wire or track is reduced to minimize friction, then carriage jams are prevented, but engagement stability may be compromised
Solution Approach 1:
The contact surface is divided into multiple ribs that provide distributed engagement points. This segmentation reduces total contact area and friction while maintaining stability through the cumulative effect of multiple contact points along the guide wire or track.
Solution Approach 2:
The engagement mechanism transitions from a two-dimensional flat surface contact to a multi-point contact along the length of the guide wire or track. This dimensional change allows reduced friction while maintaining stability through distributed engagement along the travel path.
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 device effectively reduces the tilting angle from 1.4° to 0.5°, preventing carriage jams and ensuring smooth operation by minimizing friction, thus enhancing the reliability of digital image scanners.
Implementation Method 1
minimizing static friction and preventing tilting while maintaining stable carriage movement
Data Source
AI summary
An example device includes a U-shaped body to be placed around a guide on which a scanner carriage is to be guided. A fixed leg of the U-shaped body is attached to a linearly translatable scanner carriage. A free leg of the U-shaped body is not attached to the scanner carriage and has inward facing ribs. The ribs on the free leg of the U-shaped body are positioned to come into contact with the guide to align the scanner carriage with the guide.