Abstract: A vehicle seat capable of exhibiting both performances of regulating an input of a load and reducing vibration is provided. One aspect of the present disclosure is a vehicle seat including a coupling structure coupling a first member and a second member. The coupling structure includes a bolt inserted through the first member and the second member, an auxiliary member arranged so as to hold the first member between the auxiliary member and the second member in an axial direction of the bolt, a first elastic element arranged between the first member and the second member in the axial direction, the first elastic element being in contact with the first member and the second member, and a second elastic element arranged between the first member and the auxiliary member in the axial direction, the second elastic element being in contact with the first member and the auxiliary member.

Abstract: A vehicle seat capable of exhibiting both performances of regulating an input of a load and reducing vibration is provided. One aspect of the present disclosure is a vehicle seat including a coupling structure coupling a first member and a second member. The coupling structure includes a bolt inserted through the first member and the second member, an auxiliary member arranged so as to hold the first member between the auxiliary member and the second member in an axial direction of the bolt, a first elastic element arranged between the first member and the second member in the axial direction, the first elastic element being in contact with the first member and the second member, and a second elastic element arranged between the first member and the auxiliary member in the axial direction, the second elastic element being in contact with the first member and the auxiliary member.

Abstract: A back frame, which forms a framework of a seatback, includes a back side frame, a stopper, and an extending portion. The back side frame is rotatable with respect to a cushion frame in seat front-rear directions. The stopper is fixed to the back side frame and includes a contact portion. When the contact portion contacts a contact target portion that is immobile with respect to the cushion frame, the stopper restricts rotation of the back side frame. The extending portion extends from the stopper in the seat front-rear directions. The extending portion is fixed to the back side frame in at least a part of the extending portion.

Abstract: A vehicle seat includes: a fixed frame; a tower frame arranged at a position offset from the fixed frame toward a first side along a seat-width direction; a recliner arranged between the tower frame and the fixed frame; a tilt restriction mechanism arranged opposite to the recliner relative to the fixed frame; and an abutting member arranged on a same side as the tilt restriction mechanism relative to the fixed frame.

Abstract: A vehicle seat includes: a fixed frame; a tower frame arranged at a position offset from the fixed frame toward a first side along a seat-width direction; a recliner arranged between the tower frame and the fixed frame; a tilt restriction mechanism arranged opposite to the recliner relative to the fixed frame; and an abutting member arranged on a same side as the tilt restriction mechanism relative to the fixed frame.

Abstract: A back frame, which forms a framework of a seatback, includes a back side frame, a stopper, and an extending portion. The back side frame is rotatable with respect to a cushion frame in seat front-rear directions. The stopper is fixed to the back side frame and includes a contact portion. When the contact portion contacts a contact target portion that is immobile with respect to the cushion frame, the stopper restricts rotation of the back side frame. The extending portion extends from the stopper in the seat front-rear directions. The extending portion is fixed to the back side frame in at least a part of the extending portion.

Abstract: A seat back frame including an upper frame forming an upper framework of a seat back and extending in a seat width direction, and a side frame forming a side framework of the seat back and extending in a seat height direction, wherein an upper end of the side frame extends in the seat height direction up to a portion of the upper frame extending in the seat width direction, and wherein the side frame includes a general surface portion which is in contact with the upper fame from below with its surface facing the seat width direction, and a flange portion which protrudes from the general surface portion with its surface facing a seat front and rear direction, is in contact with the upper frame from at least one of the front and rear sides, and is welded to the upper frame.

Abstract: A vehicle seat that can reduce the mass of a side frame without significantly reducing the mechanical strength of the side frame is provided. The vehicle seat comprises a back frame that comprises a side frame that extends substantially vertically, and a recliner that is coupled to a lower end of the side frame and configured so that the back frame is pivotable. The side frame comprises a side frame body that comprises a closed cross-section portion and extends from an upper end of the side frame to the recliner, and a reinforcing member that extends to the recliner from a point between a first and a second end of the side frame body along an extension axis of the side frame body and is fixed to the side frame body with at least a part of the reinforcing member being inserted into the closed cross-section portion.

Abstract: A vehicle seat that can reduce the mass of a side frame without significantly reducing the mechanical strength of the side frame is provided. The vehicle seat comprises a back frame that comprises a side frame that extends substantially vertically, and a recliner that is coupled to a lower end of the side frame and configured so that the back frame is pivotable. The side frame comprises a side frame body that comprises a closed cross-section portion and extends from an upper end of the side frame to the recliner, and a reinforcing member that extends to the recliner from a point between a first and a second end of the side frame body along an extension axis of the side frame body and is fixed to the side frame body with at least a part of the reinforcing member being inserted into the closed cross-section portion.

Abstract: A seat back frame including an upper frame forming an upper framework of a seat back and extending in a seat width direction, and a side frame forming a side framework of the seat back and extending in a seat height direction, wherein an upper end of the side frame extends in the seat height direction up to a portion of the upper frame extending in the seat width direction, and wherein the side frame includes a general surface portion which is in contact with the upper fame from below with its surface facing the seat width direction, and a flange portion which protrudes from the general surface portion with its surface facing a seat front and rear direction, is in contact with the upper frame from at least one of the front and rear sides, and is welded to the upper frame.