Scanner Guiding Structure for Oblique Object Entry

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Solution Overview

Problem

Conventional scanners experience image distortion due to sudden force variations when scanning objects of varying thickness, caused by the deformation of resilient components in the idle rollers, leading to uneven moving speeds and scanning quality issues.

Innovation Solution

A guiding structure is introduced that guides the object to enter the scanner obliquely, using guiding ribs to maintain a consistent force on the object as it passes through the scanning passage, and a control unit for image calibration to address angular differences.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a resilient component is used in the idle roller to adjust for varying object thickness, then the scanner can accommodate different thicknesses, but the resilient component deforms with thicker objects causing large force variation and image distortion

Engineering Contradiction:

Improveability to scan objects of different thicknessesVSAvoidimage distortion

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The idle roller assembly is segmented into multiple independent resilient components (first resilient component and second resilient component) that independently compress and decompress during the scanning process, distributing the force variation across multiple stages rather than a single component

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The idle roller is pre-positioned and pre-compressed by resilient components before the object enters the scanning area. As the object progresses through the feeding passage, the resilient components gradually compress and decompress in a controlled sequence, preliminarily preparing the force application to smooth out variations

Inventive Principle:

Principle #10Preliminary action

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

This approach ensures a smooth force variation on the object, preventing image distortion and enhancing scanning quality by maintaining an even moving speed and correcting image coordinates.

Implementation Method 1

the resilient component generates a resilient force to push the front idle roller assembly 13' to press the object 2' downwardly

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10659645B2Guiding structure adapted for a scanner and capable of preventing image distortion and scanner therewith

Publication Date: 2020.05.19 AVISION

AI summary

A scanner includes an image capturing module, a drive roller assembly, an idle roller assembly, and a guiding structure. The image capturing module is for capturing an image of an object. The drive roller assembly is for driving the object to move along a feeding direction. The idle roller assembly is for preventing a moving direction of the object away from the feeding direction by resiliently pressing the object. A feeding passage is formed between the drive roller assembly and the idle roller assembly. The guiding structure is disposed in front of the feeding passage and for guiding a normal direction of a leading edge of the object to be oblique relative to the feeding direction at an oblique angle. Therefore, the present invention can effectively reduce variation of a resistance force acting on the object as the object moves in the feeding path, which prevents image distortion.