Method for preventing damage to a side brush

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Solution Overview

Problem

Side brushes on cleaning robots are susceptible to damage from excessive force and prolonged exposure, particularly when manually handled by users, leading to bending or kinking that impairs cleaning performance.

Innovation Solution

The method involves detecting when the robot is lifted and placed back down, automatically rotating the side brush for a predetermined period to free cleaning arms from bent or kinked positions, preventing permanent damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the cleaning robot is manually handled and placed on the floor by the user, then the device can be moved to different locations or returned to charging station, but the cleaning arms of the side brush may become bent or kinked causing permanent damage

Engineering Contradiction:

ImproveManual handling and placementVSAvoidSide brush cleaning arm integrity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The system performs a preliminary rotation of the side brush immediately after detecting that the device has been placed on the floor. This preliminary action occurs before any cleaning operation, proactively preventing potential damage to the cleaning arms by freeing them from bent or kinked positions caused by manual handling.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system uses sensors to detect when the device is lifted from and placed on the floor, creating a feedback loop that triggers the protective rotation sequence. This feedback mechanism allows the system to respond automatically to user actions that may have caused cleaning arm deformation.

Inventive Principle:

Principle #23Feedback

2Reliability

If the side brush cleaning arms are bent or kinked for a prolonged period, then the deformation becomes permanent, but continuous rotation would increase wear on the brush

Engineering Contradiction:

ImproveCleaning arm straightnessVSAvoidSide brush rotation time

Core Design Contradiction:

ReliabilityVSDuration of action of moving object

Solution Approach 1:

The system implements periodic rotation of the side brush at specific intervals - namely after the device is placed on the floor and before cleaning operations begin. This periodic action is sufficient to prevent permanent deformation without requiring continuous rotation, thereby balancing cleaning arm maintenance with brush wear prevention.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentEP4670600A1Method for preventing damage to a side brush

Publication Date: 2025.12.31 BSH HAUSGERATE GMBH

Figure 1A~1C
Figure 2

AI summary

A method for avoiding damage to a side brush (5) of a mobile, self-propelled device (10), in particular a floor cleaning device such as a vacuuming and/or sweeping and/or mopping robot, is described, comprising the following procedural steps: detection by the device (10) that the device (10) has been lifted from the floor; detection by the device (10) that the device (10) has been placed on the floor; and rotation of the side brush (5) after the device (10) has been placed on the floor.