Floor Cleaning Nozzle Ribs That Block Cord Jamming
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Solution Overview
Problem
Existing floor cleaning devices face issues with obstacles getting caught by rotating brushes, leading to jamming and potential damage, and previous solutions either fail to prevent obstacles from entering the nozzle housing or compromise cleaning efficiency by entangling dirt and hairs.
Innovation Solution
A nozzle arrangement with a protection assembly featuring spaced ribs and a suction channel that prevents large obstacles from entering while allowing dirt and hairs to pass through, ensuring efficient cleaning and safety by guiding particles into a dust pan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ribs are added to prevent power cords from wrapping around the brush, then safety is improved, but friction increases and cleaning performance decreases
Solution Approach 1:
The protection assembly is segmented into multiple spaced-apart ribs rather than a continuous barrier. This segmentation allows dirt and hairs to pass through the gaps while still preventing power cords from wrapping around the brush, thus maintaining cleaning performance while providing safety protection.
Solution Approach 2:
The ribs are positioned specifically at locations where power cords are most likely to be caught, rather than creating a continuous obstruction. The spaced arrangement provides local protection against cord entanglement while maintaining open pathways for normal cleaning debris to pass through to the collection container.
2Reliability
If a continuous barrier is used to prevent obstacles from entering the nozzle, then safety is improved, but dirt and hairs become entangled in the barrier
Solution Approach 1:
Instead of a continuous barrier, the protection assembly uses spaced-apart ribs that create gaps. These gaps prevent large obstacles like power cords from entering while allowing dirt and hairs to pass through to the collection container, eliminating the entanglement problem associated with continuous barriers.
3Reliability
If ribs extend completely through the brush hairs, then power cord protection is improved, but friction with the brush increases
Solution Approach 1:
The ribs extend only partially through the brush hairs rather than completely through them. This partial extension provides sufficient protection against power cord entanglement while minimizing contact with the brush elements, thereby reducing friction and maintaining cleaning efficiency.
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
Prevents obstacles like power cords from entering the nozzle housing, reduces friction, and maintains cleaning efficiency by ensuring dirt and hairs are not entangled, thus preventing damage and improving user convenience.
Implementation Method 1
a suction channel (42) is defined between a back end (44) of the ribs (34) and an opposite inner wall element (46) of the nozzle housing (28)... the brush elements (16) extend at least partly into the suction channel (42) during the brush's rotation
Data Source
AI summary
The present invention relates to a nozzle arrangement (10) for a floor cleaning device (100), comprising a nozzle housing (28); a brush (12) rotatable about a brush axis (14), wherein the brush (12) is partially surrounded by the nozzle housing (28) and protrudes from a bottom side (30) of said nozzle housing (28), said brush (12) being provided with brush elements (16) for picking up dirt and/or liquid particles (22, 24) from a surface to be cleaned (20) during the rotation of the brush (12), and a protection assembly (32) for preventing obstacles (40) from getting sucked into the nozzle housing (28) or wrapped around the brush (12), wherein said protection assembly (32) is arranged within the nozzle housing (28) and comprises a plurality of spaced apart ribs (34) that extend at least partly through the brush (12), wherein a suction channel (42) is defined between a back end (44) of the ribs (34) and an opposite inner wall element (46) of the nozzle housing (28), wherein said back end (44) of the ribs (34) is facing away from the brush axis (14) and said inner wall element (46) is facing towards said back end (44) of the ribs (34) and spaced apart from said back end (44), and wherein the brush elements (16) extend at least partly into the suction channel (42) during the brush's rotation.