Rotatable brush for surface cleaning apparatus
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Solution Overview
Problem
Rotary brushes in surface cleaning apparatuses often face issues with hair and string debris becoming embedded in bristles, leading to impaired performance and requiring manual removal, which is time-consuming and undesirable.
Innovation Solution
Incorporating leading and trailing hair blocking members, such as flexible elastomeric strips, on the brush roll to prevent hair and string from becoming embedded in the bristles, and optionally using sheaths or internal hair blocking members within bristle tufts to inhibit debris migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a brush roll with bristles is used to clean surfaces, then debris can be effectively dislodged and directed towards the inlet, but hair and string-like material become embedded in the bristles, impairing performance
Solution Approach 1:
The brush roll is segmented into distinct functional zones: a first portion with bristles for debris dislodging, and a second portion with a smooth surface for preventing hair entanglement. This segmentation allows each zone to perform its specific function without interfering with the other, resolving the contradiction between effective cleaning and performance maintenance.
Solution Approach 2:
The harmful function of hair entanglement is extracted from the brush roll by separating the smooth section from the bristled section. The smooth section specifically targets and removes hair and string-like material, while the bristled section handles particulate debris, allowing both functions to operate independently and effectively.
2Productivity
If bristles are used to agitate debris, then cleaning effectiveness is improved, but manual removal of embedded hair becomes necessary, consuming time
Solution Approach 1:
The brush roll performs self-maintenance by incorporating a smooth section that automatically removes hair and string-like material during normal operation. As the brush roll rotates, the smooth section continuously clears embedded debris, eliminating the need for manual intervention and reducing maintenance time while preserving the cleaning effectiveness of the bristled section.
3Productivity
If the brush roll rotates to agitate debris, then debris is dislodged from surfaces, but hair becomes wound about the brush roll
Solution Approach 1:
The brush roll is divided into a bristled portion for agitation and a smooth portion for hair management. The smooth section, positioned downstream in the rotation, intercepts hair before it can become tightly wound, allowing the bristled section to maintain full agitation effectiveness without the harmful side effect of excessive hair entanglement.
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 effectively prevents hair and string from embedding in the bristles, making it easier to dislodge debris and reducing the need for manual removal, thus enhancing the brush roll's performance and user convenience.
Implementation Method 1
the hair blocking member is flexible. For example, it may be made from an elastomeric material. Accordingly, it may be resiliently deformable.
Data Source
AI summary
A surface cleaning apparatus includes a rotatably mounted brush associated with a dirty air inlet. A plurality of bristles extend outwardly from a radial outer surface of the rotatably mounted brush. A leading hair blocking member is provided adjacent a forward rotational side of the bristles, and a trailing hair blocking member is provided adjacent a rearward rotational side of the bristles.