Automatic floor sweeping and mopping device

Abstract

The device of the present invention can carry out floor sweeping and mopping automatically and simultaneously. The automatic floor sweeping and mopping device includes a main body, a rotational sweeping brush unit, a dust collecting unit, two rolling wheels, a mopping unit, a water spraying unit, a squeegee unit and a water storing tank. The mopping unit is made of a soft, water-absorbing material and can remove residual dirt not removed by the rotational sweeping brush unit. The water spraying unit is an innovative feature and is provided above the mopping unit to keep the mopping unit in a clean condition by removing dusts and dirt stuck to it. The squeegee unit can squeeze dirt and dirty water out of the mopping unit and keep the mopping unit in a clean, partially wet condition. Because the device leaves no dirty water behind, such feature is surely superior.

What is claimed is: 
     
         1 . An automatic floor sweeping and mopping device, comprising:
 a main body;   a rotational sweeping brush unit, disposed on the underside of the main body to sweep dusts off the floor;   a dust collecting unit;   two rolling wheels, one of which is provided on either side of the dust collecting unit to facilitate the forward movement of the device;   a mopping unit, disposed behind the rotational sweeping brush unit on the underside of the main body and made of a soft, water-absorbing material to remove of residual finer dusts and dirt not removed by the rotational sweeping brush unit;   a water spraying unit, which is an innovative feature, is provided above the mopping unit to keep the mopping unit in a clean condition by removing dusts and dirt adhering to it;   a squeegee unit, provided near the frontal surface of the mopping unit to squeeze dirt and dirty water out of the mopping unit and keep the mopping unit in a clean, partially wet condition; and   a water storing tank, disposed inside the main body and partitioned into two compartments—a clean water storing region and a dirty water storing region, characterized in that the clean water storing region supplies clean water to the water spraying unit and dirty water is transported back to the dirty water storing region.   
     
     
         2 . The automatic floor sweeping and mopping device as in  claim 1 , wherein a dirty water collecting channel is provided on the squeegee unit and wherein an additional dirty water transporting tube is provided to link the dirty water collecting channel with the dirty water storing region to transport dirty water to the dirty water storing region through the aid of a pump. 
     
     
         3 . The automatic floor sweeping and mopping device as in  claim 1 , wherein a buffering element may be provided on either end of the squeegee unit to buffer and optimize the contact between the squeegee unit and the mopping unit. 
     
     
         4 . The automatic floor sweeping and mopping device as in  claim 3 , wherein the buffering element is a spring. 
     
     
         5 . The automatic floor sweeping and mopping device as in  claim 1 , wherein a separating membrane, made of a soft, flexible material, is used to separate the clean water storing region from the clean water storing region and thus the volumes of these two regions may be freely altered or changed in use, making the water storing tank structurally superior. 
     
     
         6 . The automatic floor sweeping and mopping device as in  claim 1 , wherein a plurality of spraying nozzles are longitudinally provided on the mopping unit to wet and rinse out the surface of the mopping unit. 
     
     
         7 . The automatic floor sweeping and mopping device as in  claim 6 , wherein the spraying nozzles can spray clean water onto the mopping unit to remove the dirt and dirty water adhering or attached to the surface of the mopping unit. 
     
     
         8 . The automatic floor sweeping and mopping device as in  claim 1 , wherein a high-pressure pump is provided above the water spraying unit so as to clean up the mopping unit with its high-pressure water spray.