Patent ID: 8826486

Claim:
A mop cleaning set comprising: a mop structure; and a dehydration device for dehydrating the mop structure, wherein the dehydration device comprises: a base having a through hole; a mop supporting unit disposed above the base; a bar fixing portion being disposed on the bottom of the mop supporting unit for supporting said mop structure; and a bar being penetrated and being secured in the bar fixing portion of the bottom of the mop supporting unit and the through hole of the base, said bar having a first protruded portion and a second protruded portion being disposed thereon, said first protruded portion being disposed between a bottom surface of the mop supporting unit and a top surface of the base for supporting the mop supporting unit, the second protruded portion being disposed below the through hole of the base for fixing the bar in the through hole of the base; wherein the mop structure comprises: a hollow external bar having an opening at a bottom end; a hollow internal bar having an outer diameter being smaller than an inner diameter of the external bar, said internal bar being disposed in the external bar rotationally through the opening; a unit of teeth being disposed on an inner surface of the external bar; a driving gear set connected with the unit of teeth and the internal bar, said driving gear set comprising a first gear, a second gear and a third gear, said first gear being meshed with the unit of teeth, said second gear being meshed with the first gear and the third gear, and said second gear being bigger than the first gear and the third gear, said first gear being moved in a first direction along the unit of teeth in response to an external force, said second gear rotating the third gear, and the internal bar rotating in a second direction in the external bar; and a mopping disc fixed at a bottom end of the internal bar.