Mobile Robot Mop Attachment Guider for Alignment and Floor Contact

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Solution Overview

Problem

Conventional mobile robots struggle with precise alignment and effective mopping due to lack of alignment marks, variable water levels, and insufficient driving power, leading to incomplete cleaning and potential damage from mop interference.

Innovation Solution

A mobile robot equipped with an attachment guider featuring a guide rim and elastic pieces to guide the mop portion to its original position, ensuring full contact with the floor and enhanced friction for efficient cleaning, along with a circular body design for easy rotation and increased cleaning area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If alignment marks are not used when attaching the mop, then the attachment process is simple, but the mop may be attached at an incorrect position causing interference between mops

Engineering Contradiction:
Improvemop attachment processVSAvoidmop attachment position accuracy
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent uses alignment marks with different colors or visual indicators on the rotating member and mop to guide the user during attachment. The visual contrast helps the user quickly identify the correct alignment position without complex procedures, resolving the contradiction between ease of operation and attachment accuracy.

Inventive Principle:
Principle #32Color changes

Solution Approach 2:

The patent introduces an alignment mark as an intermediary element between the rotating member and the mop. This intermediary provides a visual reference that mediates the attachment process, ensuring accurate positioning while keeping the process simple and user-friendly.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Loss of time

If the mop is attached at a position out of the original position, then the attachment process is faster, but interference between mops occurs and the rotating member may be damaged

Engineering Contradiction:
Improvemop attachment timeVSAvoidmop interference and rotating member damage
Core Design Contradiction:
Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The patent designs the attachment structure with preliminary anti-action features such as mechanical guides, snap-fit mechanisms, or interlocking elements that prevent the mop from being attached at incorrect positions. These features proactively block misalignment before it can cause interference or damage, while still allowing for quick attachment when aligned correctly.

Inventive Principle:
Principle #9Preliminary anti-action

3Device complexity

If the robot moves only by friction force of spin mops, then the structure is simple, but driving power is insufficient and straight driving is difficult

Engineering Contradiction:
Improvedriving mechanism structureVSAvoiddriving power and straight driving capability
Core Design Contradiction:
Device complexityVSPower

Solution Approach 1:

The patent combines multiple driving mechanisms (such as spin mops, oscillating mops, or additional drive wheels) to work together for movement. This merging of mechanisms increases driving power and improves straight-line stability while maintaining reasonable structural complexity through integrated design.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent designs components to serve multiple functions - for example, the mop assembly serves both cleaning and driving functions, while additional elements provide both structural support and propulsion. This multi-functionality increases power and stability without proportionally increasing complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

4Ease of operation

If the body has a circular shape for easy rotation, then rotation is easy, but the width of the agitator is limited

Engineering Contradiction:
Improvebody rotation easeVSAvoidagitator width
Core Design Contradiction:
Ease of operationVSLength of moving object

Solution Approach 1:

The patent divides the cleaning system into segmented components - the circular body for rotation and the agitator width optimized for cleaning effectiveness. The segmentation allows the circular body to rotate easily while the agitator can be positioned and sized independently to maximize cleaning width without being constrained by the body's circular geometry.

Inventive Principle:
Principle #1Segmentation

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 allows for accurate and efficient mopping, preventing mop interference and ensuring complete floor coverage, even at corners and near walls, while maintaining stability and reducing friction with obstacles.

Implementation Method 1

an attachment guider for guiding an attachment of a mop portion to a rotating plate... an attachment guider installed on the lower surface of the rotating plate to guide an attachment position of the mop portion

Methodology Applied
Scientific EffectElastic deformation: Elasticity

Implementation Method 2

a mobile robot being able to increase friction between a mop portion and a floor for effective mopping and driving of the mobile robot

Methodology Applied
Scientific EffectFriction: Friction

Data Source

PatentUS11432695B2Mobile robot
Publication Date: 2022.09.06 LG ELECTRONICS INC
  • US11432695B2 patent drawing
  • US11432695B2 patent drawing
  • US11432695B2 patent drawing

AI summary

Disclosed is a mobile robot including a body, a rotating plate rotatably installed on the body and having a lower surface where a mop portion is attached, and an attachment guider installed on the lower surface of the rotating plate to guide an attachment position of the mop portion. The attachment guider includes a guide rim and a plurality of elastic pieces. The guide rim is disposed to surround a rotation axis of the rotating plate. The plurality of elastic pieces extend from the guide rim in a direction toward the rotation axis, have a free end protruding to a lower side or downward than the guide rim, and are spaced apart from each other along a circumference of the guide rim.