Patent ID: 7921481

Claim:
A toilet bowl flush device which discharges flush water in a cistern to a water discharge path for toilet bowl flushing, comprising: a water intake pipe having an open end in the cistern; a water discharge start valve for introducing priming water for starting water discharge into the water intake pipe; a trap for forming an air stagnation section at a position midway from the open end of the water discharge start valve of the water intake pipe, the position being at a higher position relative to the open end; and a rotational operation lever for determining an amount of flush water to be discharged, whereby the directional movement chosen and used by said operation lever selects between a first predetermined amount of flush water and a second predetermined amount of flush water, wherein said second predetermined amount of flush water is greater than said first predetermined amount of flush water, wherein when said operation lever is rotated in a first direction, said first predetermined amount of flush water is discharged, and wherein when said operation lever is rotated in a second, opposite direction, said second predetermined amount of flush water is discharged.