Patent ID: 7434863

Claim:
A rotation seat for a vehicle, the rotation seat comprising: a base plate fixed on a body of the vehicle, the base plate including a guide slot; the guide slot including: a first slot formed in the shape of an arc centered about a first shaft; and a second slot having first end connecting to the first slot and second end, the second slot being formed in the shape of curve so as to make the second end approach the first shaft; a rotating plate rotatably connected to the base plate through the first shaft, the rotating plate including: a nail member being rotatable with the rotating plate, the nail member being displaceable in relation to the first shaft, the nail member being guided by the guide slot so as to regulate rotation of the rotating plate; and a biasing unit for urging the nail member; a seat fixed on the rotating plate, the seat being rotatable with the rotating plate to a forward driving position and an operator's exiting position, wherein the second slot guides the nail member when the seat is rotated between the forward driving position and operator's exiting position, the biasing member exerts a force on a wall forming the second slot through the nail member so as to make the rotating plate rotate from the operator's exiting position to the forward driving position.