Robot Cleaner Charging Device with Signal Guide for Docking Accuracy

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Solution Overview

Problem

Existing robot cleaner charging devices face challenges in accurately guiding the return induction signal and ensuring tight contact between the power supply and charging terminals for efficient charging, leading to potential inaccuracies in docking and reduced charging efficiency.

Innovation Solution

A charging device with an induction signal generating unit and an induction signal guide member that improves the linearity of the return induction signal, using a T-shaped guide with reflection units to limit the transmission angle and ensure precise docking, and an elastically supported charging terminal to maintain contact.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If the induction signal is transmitted without guidance structure, then the signal transmission is simple, but the docking accuracy and linearity are poor

Engineering Contradiction:
Improvedocking accuracyVSAvoidstructure complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

An induction signal guide member is introduced as an intermediary component between the induction signal source and the robot cleaner. This guide member, with its T-shaped structure and reflective surfaces, mediates the signal transmission to improve linearity and docking accuracy without requiring complex control systems

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The induction signal guide member extends the signal transmission in a specific directional dimension, using its elongated structure to guide the signal along a linear path. This dimensional approach converts omnidirectional signal transmission into directed signal guidance, improving docking precision

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Manufacturing precision

If the robot cleaner approaches the charging device without guidance, then the approach is simple, but the docking alignment is inaccurate causing lateral movement

Engineering Contradiction:
Improvedocking alignmentVSAvoiddocking operation
Core Design Contradiction:
Manufacturing precisionVSEase of operation

Solution Approach 1:

The induction signal guide member acts as a mediator that structures the approach path by transmitting the induction signal in a linear fashion. This guides the robot cleaner along a predetermined path toward the charging terminal, ensuring accurate alignment while maintaining simple approach operation

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The guide member provides localized signal guidance precisely at the docking area. The T-shaped structure with reflective surfaces creates a focused signal zone that improves alignment accuracy at the critical docking point without affecting the overall simplicity of the approach operation

Inventive Principle:
Principle #3Local quality

3Force

If the charging terminal is rigidly fixed, then the structure is simple, but the contact force with the power supply terminal is insufficient reducing charging efficiency

Engineering Contradiction:
Improvecontact forceVSAvoidterminal structure complexity
Core Design Contradiction:
ForceVSDevice complexity

Solution Approach 1:

The charging terminal is designed with elastic support that allows dynamic adjustment. When the robot cleaner docks, the elastic support deforms to increase contact force between the charging terminal and power supply terminal, ensuring tight contact for efficient charging while returning to its original position after docking

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The elastic support changes the physical state of the charging terminal from rigid to flexible. This parameter change allows the terminal to adapt its position and apply sufficient contact force during docking, improving charging efficiency without requiring complex mechanical pressing mechanisms

Inventive Principle:
Principle #35Parameter changes

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 enhances the accuracy of the robot cleaner's docking with the charging device, reducing lateral movement and ensuring stable, efficient charging by maintaining tight contact between the power and charging terminals.

Implementation Method 1

an induction signal generating unit disposed at a side of the cover or the base to transmit a return induction signal to the robot cleaner

Methodology Applied
Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

an induction signal guide member disposed at a side of the induction signal generating unit to enhance a docking performance of the robot cleaner by improving linearity of the induction signal

Methodology Applied
Scientific EffectSignal reflection: Reflection

Data Source

PatentEP3632283B1Charging device of robot cleaner
Publication Date: 2021.02.24 LG ELECTRONICS INC
  • EP3632283B1 patent drawingFigure 1
  • EP3632283B1 patent drawingFigure 2
  • EP3632283B1 patent drawingFigure 3

AI summary

A charging device of a robot cleaner is provided. The charging device of a robot cleaner according to the embodiment includes at least one cover forming an appearance of the charging device, a base which is coupled with the cover and includes a terminal unit for charging the robot cleaner, an induction signal generating unit disposed at a side of the cover or the base to transmit a return induction signal to the robot cleaner, and an induction signal guide member disposed at a side of the induction signal generating unit to enhance a docking performance of the robot cleaner by improving linearity of the induction signal. The charging device according to the embodiment can guide the path for the return of the robot cleaner and recharge the robot cleaner stably.