ROTARY ADJUSTMENT MECHANISM AND SEAT

A rotary adjustment mechanism, comprising: first locking members (100), second locking members (200), a rotating disc (300), and a base (400). The rotating disc (300) is rotatably connected to the base (400); the first locking members (100) and the second locking members (200) both have a locking state and an unlocking state, in the locking state, the rotating disc (300) is locked to the base (400), and in the unlocking state, the rotating disc (300) is unlocked; the first locking members (100) and the second locking members (200) are in linkage to synchronously switch between the locking state and the unlocking state. The present invention further relates to a seat. The rotary adjustment mechanism can enhance the stability of the rotating disc in the locking state and can conveniently achieve locking and unlocking.