Vehicle seat device

A vehicle seat device having a rotation device provided between a floor and a seat cushion to rotatably support the seat cushion relative to the floor,

• the rotation device comprising,
• a base portion provided on the floor;
• a rotatable portion provided on the seat cushion and rotatably supported by the base portion;
• an electric actuator for rotating the rotatable portion with respect to the base portion;
• and
• a rotation lock device for selectively prohibiting rotation of the rotatable portion with respect to the base portion,
• wherein the rotation lock device is configured to be manually switched between a locked state and a released state, and the electric actuator is configured to allow rotation of the rotatable portion with respect to the base portion when the rotation lock device is released and electric power is not supplied to the electric actuator, and
• the base portion is provided with a base plate having a vertically facing major plane, and a fixing member having a ring-shape and extending upward from the base plate, and the rotatable portion is provided with a rotatable plate rotatably supported on an upper surface of the base plate, the fixing member extending above an outer peripheral part of the rotatable plate, a slidable member being positioned between an upper surface of the rotatable plate and the fixing member.

A method for manufacturing a vehicle,

• wherein a seat device has a rotation device provided between a floor and a seat cushion to rotatably support the seat cushion relative to the floor,
• the rotation device comprising,
• a base portion provided on the floor;
• a rotatable portion provided on the seat cushion and rotatably supported by the base portion;
• an electric actuator for rotating the rotatable portion with respect to the base portion;
• and
• a rotation lock device for selectively prohibiting rotation of the rotatable portion with respect to the base portion,
• the rotation lock device is configured to be manually switched between a locked state and a released state, and the electric actuator is configured to allow rotation of the rotatable portion with respect to the base portion when the rotation lock device is released and electric power is not supplied to the electric actuator,
• the rotation lock device is movably supported by one of the base portion and the rotatable portion, and is provided with a lock claw that is movable between a lock position for engaging another of the base portion and the rotatable portion and a release position for disengaging from the other of the base portion and the rotatable portion, and one of the base portion and the rotatable portion is provided with a lock claw sensor that detects a position of the lock claw, the electric actuator being configured to be driven when the lock claw is at the release position,
• the base portion is provided with a base plate having a vertically facing major plane, and the rotatable portion is provided with a rotatable plate rotatably supported on an upper surface of the base plate,
• the method comprising the step of:
• disposing the lock claw and the lock claw sensor, in plan view, radially inward of an outer peripheral edge of the rotatable plate.