Dual-Brush Cleaning Sheet Structure for Versatile Surface Cleaning

The patent applies local quality by providing different fiber layer structures on the first and second sides of the base. The first fiber layer has first fibers with a first fineness and the second fiber layer has second fibers with a second fineness different from the first. This allows each side to be optimized for specific cleaning tasks - one side for rough cleaning and the other for fine finishing - thereby improving versatility without significantly complicating the manufacturing process.

The patent segments the fiber layers into distinct first and second fiber layers with different characteristics. The first fiber layer contains first fibers with a first fineness while the second fiber layer contains second fibers with a second fineness. This segmentation allows independent optimization of each layer's properties for different cleaning functions, achieving high versatility while maintaining manageable structural complexity through clear functional division.

The patent implements local quality by creating a brush part with spatially varying fiber properties. The first fiber layer has first fibers with a first fineness suitable for certain cleaning tasks, while the second fiber layer has second fibers with a second fineness optimized for different tasks. This local differentiation of fiber characteristics within the single brush part enables effective cleaning of diverse surfaces without requiring multiple separate brush components, thus maintaining low device complexity while improving cleaning effectiveness.