Patent ID: 8196898

Claim:
A water-stop plug of the flush valve comprising a connecting sheet, a fixing component and a casing body; the fixing component fits with the top surface of the connecting sheet, and the casing body fits with the bottom surface of the connecting sheet; wherein: the connecting sheet is a sheet body made of soft material, wherein the sheet body is disposed of a through hole at one side, and a flange and at least one position-limiting protrusion are disposed around the peripheral edge of the through hole; a ring part is disposed at the other side of the sheet body, wherein two hook-hanging parts are correspondingly disposed at two sides of the ring part respectively, and a U-shaped through hole is disposed between the two hook-hanging parts and the ring part; the two hook-hanging parts each has a hanging hole, and the ring part has a fitting hole; the fixing component provides a hanging seat on the surface thereof, and the hanging seat has a through hole to allow hanging of a chain; a ring-shaped groove and a plurality of position-limiting sheets are disposed on the bottom surface of the fixing component corresponding to the through hole; a notch is disposed between every two adjacent position-limiting sheets, wherein the notch is corresponding to the position-limiting protrusion of the connecting sheet to allow the insertion of the position-limiting protrusion thereof; the ring-shaped groove is provided to allow insertion of the flange of the connecting sheet and thereby limiting the position of the connecting sheet; and the casing body is a hemisphere fitting with the bottom surface of the connecting sheet and tabling with the position-limiting sheets of the fixing component; wherein the casing body comprises a concave receiving chamber and a flange is disposed around the peripheral edge thereof.