Water stopper structure for a washing sink

Abstract

A water stopper structure for a washing sink contains a washing sink having a large diameter hole to receive a water seat; the water seat including a larger diameter cavity and a small diameter cavity having plural outlets and a guiding orifice, the larger diameter cavity including first outer threads to screw with a screwing ring so that the water seat is fixed in the large diameter hole, the small diameter cavity including second outer threads to screw with a tube; a filter cup having plural filtering apertures and a central aperture to fit a guide bolt such that a water stopper is fixed; a water stopper including a sealing rib and a seal section; the guide bolt including a head segment and a guiding post such that the water stopper is fixed between the head segment and the guiding post of the guide bolt and under the filter cup.

What is claimed is: 
     
         1 . A water stopper structure for a washing sink comprising:
 a washing sink having a large diameter hole on a bottom end to receive a water seat;   a water seat comprising a larger diameter cavity on an upper side and a small diameter cavity on a lower side, wherein the small diameter cavity comprising a plurality of outlet on a bottom end and a guiding orifice on a central position, wherein the larger diameter cavity of the water seat comprising first outer threads formed around an outer rim to be fitted with a screwing ring so that the water seat is fixed in the large diameter hole of the washing sink, where in the small diameter cavity of the water seat comprising a second outer threads formed around an outer rim to be fitted with a tube;   a filter cup fitted into the larger diameter cavity of the water seat comprising a plurality of filtering apertures on a peripheral wall of a lower side and a central aperture formed on a central position of a bottom end to fit a guide bolt such that a water stopper made of plastic martial is fixed; wherein the guide bolt including a head segment and a guiding post such that the water stopper is fixed between the head segment and the guiding post of the guide bolt and under the filter cup; and   a water stopper fixed under the filter cup with a diameter being equal to that of the small diameter cavity, the said water stopper comprising a sealing rib extending outward around an outer face of a lower side and a seal section extending outward from an upper side of the outer face;   
     
     
         2 . The water stopper structure for the washing sink as claimed in  claim 1 , wherein an outer diameter of the sealing rib is equal to a diameter of the small diameter cavity. 
     
     
         3 . The water stopper structure for the washing sink as claimed in  claim 1 , wherein an outer diameter of the sealing rib is larger than a diameter of the small diameter cavity. 
     
     
         4 . The water stopper structure for the washing sink as claimed in  claim 1 , wherein a shape of the guiding post matches with that of the guiding orifice of the small diameter cavity, and the guiding orifice is non-circular. 
     
     
         5 . The water stopper structure for the washing sink as claimed in  claim 1 , wherein a shape of the guiding post matches with that of the guiding orifice of the small diameter cavity, and the guiding orifice is circular.