Vacuum Cleaner Nozzle With Resilient Brush Roll Cleaning
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Solution Overview
Problem
Existing vacuum cleaner nozzles with rotatable members, such as brush rolls, face challenges in efficiently removing entangled fibrous materials like threads and hair due to the high force required to dislodge them, which can impede the brush roll's rotation and cleaning efficiency.
Innovation Solution
A nozzle design featuring a rotatable member with a cleaning arrangement that includes radially projecting members with resilient sheet members, allowing for efficient entanglement removal through controlled contact during rotation, minimizing the impact on rotational speed and ensuring effective cleaning without manual force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cleaning member presses against a friction member to remove entangled threads, then the cleaning effectiveness is improved, but the power required to rotate the brush roll increases significantly
Solution Approach 1:
The cleaning member uses a flexible friction member in the form of a thin strip or band that can conform to the brush roll surface. This flexible structure provides sufficient cleaning contact pressure while requiring less power to rotate compared to rigid cleaning mechanisms
Solution Approach 2:
The friction member is made resilient or elastic, allowing it to deform and adapt to the brush roll surface during rotation. This parameter change in material properties enables effective cleaning contact with reduced rotational power requirements
2Reliability
If a significant force is applied to thread off entangled threads by a cleaning member, then the cleaning function is improved, but the rotational speed of the brush roll decreases
Solution Approach 1:
The flexible friction member maintains continuous contact with the brush roll surface during rotation, providing cleaning action that does not significantly impede rotational speed while effectively removing entangled threads
Solution Approach 2:
The cleaning system is designed to operate dynamically during brush roll rotation, with the flexible friction member adapting its contact pressure as the brush roll rotates, enabling cleaning without substantial speed reduction
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 enables efficient cleaning of entangled articles while maintaining the brush roll's rotational speed, reducing cleaning time and ensuring proper nozzle function, as the resilient contact allows for effective removal of entangled materials without excessive power requirements.
Implementation Method 1
The cleaning member comprises a resilient sheet member capable of providing a resilient contact with at least one segment of the at least one support surface in the at least one cleaning position during rotation of the rotatable member
Data Source
Figure 1
Figure 2~3
Figure 4a~4b
AI summary
The present invention relates to a nozzle (1) for a vacuum cleaner (2). The nozzle comprises a rotatable member (3) arranged around a longitudinal axis for picking up particles from a surface to be cleaned, and a cleaning arrangement for removing articles entangled to the rotatable member. The cleaning arrangement comprises at least one support surface (4) provided on at least one radially projecting member (13) of the rotatable member, and at least one cleaning member (5) movable between a resting position in which the cleaning member is arranged at a distance from the support surface and at least one cleaning position in the vicinity of the rotatable member. In cleaning position, the cleaning member, during rotation of the rotatable member, co-operates with at least one segment of the support surface to remove any entangled articles from the rotatable member. The cleaning member comprises a resilient sheet member (5a) capable of providing a resilient contact with at least one segment of the at least one support surface in the at least one cleaning position during rotation of the rotatable member.