Dual-Hardness Disc Brush for Variable-Dirt Scrubbing
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Solution Overview
Problem
Existing power scrubbers with uniform bristle settings on inner and outer disc bodies fail to effectively address varying degrees of dirtiness on different surfaces, necessitating manual scrubbing or brush changes.
Innovation Solution
A disc brush for power scrubbers featuring inner and outer disc bodies with scrubbing bodies of differentiated hardness and height, allowing users to choose between softer and harder scrubbing options based on dirtiness, enhancing user experience and scrubbing effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform bristle settings are used on inner and outer disc bodies, then manufacturing is simplified, but scrubbing effectiveness on varying dirtiness levels deteriorates
Solution Approach 1:
The patent applies local quality by differentiating the bristle properties at different locations on the disc brush. Specifically, the inner disc body is equipped with softer bristles while the outer disc body has harder bristles, allowing each region to perform optimally for its specific scrubbing needs. This resolves the contradiction by maintaining manufacturing simplicity through a modular design while achieving scrubbing adaptability through localized property differentiation.
2Device complexity
If identical bristles are used on both disc bodies, then device complexity is reduced, but scrubbing performance on different surfaces deteriorates
Solution Approach 1:
The patent segments the brush system into two distinct functional units: an inner disc body with softer bristles for gentle surfaces and an outer disc body with harder bristles for tough surfaces. This segmentation allows the device to maintain low overall complexity through modular construction while achieving high scrubbing effectiveness by selecting the appropriate segment for each cleaning task.
3Measurement precision
If users need to change disc brushes for different dirtiness levels, then scrubbing precision is improved, but loss of time increases
Solution Approach 1:
The patent merges multiple brush functions into a single integrated disc brush assembly by combining softer bristles on the inner disc body with harder bristles on the outer disc body. This allows users to access different scrubbing intensities without changing brushes, eliminating time loss while maintaining scrubbing precision through the dual-bristle configuration.
4Adaptability or versatility
If softer scrubbing bodies are made taller, then adaptability to light dirt is improved, but structural complexity increases
Solution Approach 1:
The patent applies asymmetry by making the softer scrubbing bodies on the inner disc body taller than the harder scrubbing bodies on the outer disc body. This asymmetric height configuration optimizes contact with surfaces for different dirtiness levels while maintaining a relatively simple overall structure through consistent radial arrangement and uniform material selection.
Data Source
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AI summary
Disclosed is a disc brush (100) for a power scrubber and a power scrubber having such a disc brush (100), which relates to power tools. The disc brush (100) includes an inner disc body (110) and an outer disc body (120), the inner disc body (110) being disposed at an inner periphery of the outer disc body (120), a scrubbing body (130) being set at an underside of the inner disc body (110) and at an underside of the outer disc body (120), respectively; the scrubbing bodies are differentiated into at least two degrees of hardness, a softer scrubbing body (134, 131) being set with a height not lower than that of a harder scrubbing body (135, 132). The power scrubber includes a housing (200), an electric motor (400), a drive assembly, and the disc brush (100) described above; the electric motor actuates, via the drive assembly, the inner disc body (110) and the outer disc body (120) to rotate in opposite directions or in a same direction. A user may choose to use the softer scrubbing body (134, 131) or the harder scrubbing body (135, 132) to scrub dirt dependent on a degree of dirtiness without a need of changing the disc brush (100), which improves user experience.