One-way damper and closestool

The invention discloses a one-way damper and a closestool. The one-way damper comprises a first rotating piece, a rotating shaft, a locking piece and a damping piece. The rotating shaft is rotationally connected with the first rotating piece. The locking piece has a locking state and a separation state, in the locking state, the locking piece is connected with the rotating shaft and the first rotating piece, and the rotating shaft and the first rotating piece can rotate synchronously; in the separated state, the first rotating piece rotates relative to the rotating shaft; the damping piece is rotationally connected with the rotating shaft, and when the rotating shaft rotates relative to the damping piece, the damping piece can provide reverse resistance; the first rotating part has a first rotating direction and a second rotating direction which are opposite, and when the first rotating part rotates in the first rotating direction, the locking part is switched to the separation state; and ...