An armrest release mechanism includes a pivot bush. A release bracket is fixed to the pivot bush. An armrest pivot is supported on the pivot bush for relative rotational movement. A release board is also supported on the pivot bush for relative rotational movement. The release board is movable between a locked position and an unlocked position. An armrest lock is attached to the release bracket for relative movement. The armrest lock is also attached to the release board. When the release board is in the locked position the armrest lock is engaged with the armrest pivot to prevent movement of the armrest pivot relative to the pivot bush. When the release board is in the unlocked position the armrest lock is not engaged with the armrest pivot.

An armrest release mechanism includes a pivot bush. A release bracket is fixed to the pivot bush. An armrest pivot is supported on the pivot bush for relative rotational movement. A release board is also supported on the pivot bush for relative rotational movement. The release board is movable between a locked position and an unlocked position. An armrest lock is attached to the release bracket for relative movement. The armrest lock is also attached to the release board. When the release board is in the locked position the armrest lock is engaged with the armrest pivot to prevent movement of the armrest pivot relative to the pivot bush. When the release board is in the unlocked position the armrest lock is not engaged with the armrest pivot.

A configuration is adopted such that the shape of a peripheral wall portion of a shell-shaped seat back skeleton can be freely set without being restricted by the presence of brackets, the incidence of warping of the seat back skeleton when a vehicle is involved in a rear-end or head-on collision is reduced, and the seat back skeleton does not lose strength even when brackets are affixed to the seat back skeleton. A seat cushion skeleton 8 and the seat back skeleton 9 are coupled by coupling means 19a, 19b, and the seat back skeleton 9 has a main body 14 facing the back of a seated passenger, and a peripheral wall part 15 provided to the peripheral edge of the main body 14. The main body 14 and the peripheral edge part 15 are formed into an integrated shell shape using a synthetic resin. The coupling means 19a, 19b have first brackets 21a, 21b that are joined to the seat back skeleton 9, the first brackets 21a, 21b being affixed by bonding to the main body 14 of the seat back skeleton 9.

A configuration is adopted such that the shape of a peripheral wall portion of a shell-shaped seat back skeleton can be freely set without being restricted by the presence of brackets, the incidence of warping of the seat back skeleton when a vehicle is involved in a rear-end or head-on collision is reduced, and the seat back skeleton does not lose strength even when brackets are affixed to the seat back skeleton. A seat cushion skeleton 8 and the seat back skeleton 9 are coupled by coupling means 19a, 19b, and the seat back skeleton 9 has a main body 14 facing the back of a seated passenger, and a peripheral wall part 15 provided to the peripheral edge of the main body 14. The main body 14 and the peripheral edge part 15 are formed into an integrated shell shape using a synthetic resin. The coupling means 19a, 19b have first brackets 21a, 21b that are joined to the seat back skeleton 9, the first brackets 21a, 21b being affixed by bonding to the main body 14 of the seat back skeleton 9.

A second bracket of a vehicle seat reclining device includes a first pawl restriction portion and a second pawl restriction portion arranged respectively in correspondence with a first pawl and a second pawl to restrict movement of the first pawl and the second pawl in the radial direction. The second pawl restriction portion is located toward the positive direction and a radially inner side from the first pawl restriction portion. Negative direction ends of the first pawl restriction portion and the second pawl restriction portion are arranged to contact positive direction corners of the limitation portions of the first pawl and the second pawl when a rotation angle of the second bracket relative to the first bracket is a specified angle. The first pawl restriction portion allows movement of the second pawl toward the radially outer side.

A second bracket of a vehicle seat reclining device includes a first pawl restriction portion and a second pawl restriction portion arranged respectively in correspondence with a first pawl and a second pawl to restrict movement of the first pawl and the second pawl in the radial direction. The second pawl restriction portion is located toward the positive direction and a radially inner side from the first pawl restriction portion. Negative direction ends of the first pawl restriction portion and the second pawl restriction portion are arranged to contact positive direction corners of the limitation portions of the first pawl and the second pawl when a rotation angle of the second bracket relative to the first bracket is a specified angle. The first pawl restriction portion allows movement of the second pawl toward the radially outer side.

A vehicle seat arrangement includes a vehicle seat arranged to be adjusted between a forward facing setup and a rearward facing setup and a seat back rotation axle. A seat back is rotatable around a seat back rotation axle between a forward facing seat back setup and a rearward facing seat back setup. The seat cushion is arranged to be adjusted between a forward facing seat cushion setup and a rearward facing seat cushion setup. The seat back rotation axle may be arranged to be fixed in location and the seat cushion may be arranged to be displaceable horizontally or the seat back rotation axle may be arranged to be displaceable horizontally and the seat cushion may be arranged to be fixed in location.

An occupant support adapted for use in a vehicle includes a seat bottom coupled to a floor of the vehicle and a seat back configured to pivot about a seat-back pivot axis relative to the seat bottom between an upright position and a folded-forward position. The occupant support further includes an upper-back support system configured to support an upper back of an occupant of the occupant support.

An occupant support adapted for use in a vehicle includes a seat bottom coupled to a floor of the vehicle and a seat back configured to pivot about a seat-back pivot axis relative to the seat bottom between an upright position and a folded-forward position. The occupant support further includes an upper-back support system configured to support an upper back of an occupant of the occupant support.

A vehicle seat includes a seat cushion, a seatback, and a headrest. At least one of the seat cushion, the seatback, and the headrest includes a fixed part and a movable part. The fixed part and the movable part that is mounted so as to be movable relative to the fixed part are provided adjacent to each other. A border between the movable part and the fixed part is exposed to an outside of the seat. A movable-side edge of the movable part and a fixed-side edge of the fixed part are disposed adjacent to each other along a direction of movement of the movable part so as to form at least a part of the border exposed to the outside of the seat. The movable part moves relative to the fixed part while keeping a constant clearance between the movable-side edge and the fixed-side edge.