Abstract: A seating posture is stabilized for the shoulders of a passenger seated on a vehicle seat. A vehicle seat is provided with a seat back configured to support the seated person from the rear. A shoulder support portion of the seat back configured to support a corresponding one of the shoulders of the seated passenger includes an air cell configured to expand when air is supplied. When the air cell expands, one end portion of the shoulder support portion on the outside in the width direction of the vehicle seat moves more forward than the other end portion of the shoulder support portion on the inside in the width direction.

Abstract: A seating posture is stabilized for the shoulders of a passenger seated on a vehicle seat. A vehicle seat is provided with a seat back configured to support the seated person from the rear. A shoulder support portion of the seat back configured to support a corresponding one of the shoulders of the seated passenger includes an air cell configured to expand when air is supplied. When the air cell expands, one end portion of the shoulder support portion on the outside in the width direction of the vehicle seat moves more forward than the other end portion of the shoulder support portion on the inside in the width direction.

Abstract: Provided is to stabilize a fixed state of each bag body provided at a vehicle seat and configured to expand to push a corresponding one of the shoulders of a seated passenger. Of a seat back provided at the vehicle seat, each shoulder support configured to support a corresponding one of the shoulders of the seated passenger includes an air cell configured to expand by injection of air. The air cell includes protrusions extending in a predetermined direction and provided at respective end portions of the air bag in the extending direction thereof. The air cell is attached to the inside of the seat back in such a manner that each of the protrusions provided at respective end portions in the extending direction is fixed to a corresponding one of fixing positions separated from each other in the width direction of the vehicle seat.

Abstract: A seating posture is stabilized for the shoulders of a passenger seated on a vehicle seat. A vehicle seat is provided with a seat back configured to support the seated person from the rear. A shoulder support portion of the seat back configured to support a corresponding one of the shoulders of the seated passenger includes an air cell configured to expand when air is supplied. When the air cell expands, one end portion of the shoulder support portion on the outside in the width direction of the vehicle seat moves more forward than the other end portion of the shoulder support portion on the inside in the width direction.

Abstract: A vehicle seat comprises a synthetic resin cushion plate (31) attached to a back frame (3) by way of seat springs (32) so as to be movable forward or backward, a single elastic auxiliary plate (40) attached to the cushion plate (31) so as to be movable forward or backward relative to the cushion plate (31), a specific section of the auxiliary plate (40) formed as a push-out section (70) protruding forward when a distance between an upper edge and a lower edge of the auxiliary plate (40) is shortened by moving the lower edge upward. Elasticity of the auxiliary plate (40) supporting the body of the seated passenger is adjusted by moving the auxiliary plate (40) near the push-out section (70) forward or backward. The push-out section (70) has a corrugated part (71) formed from a sideways projection that projects forward or/and backward as viewed from a side.

Abstract: A vehicle seat comprises a synthetic resin cushion plate (31) attached to a back frame (3) by way of seat springs (32) so as to be movable forward or backward, a single elastic auxiliary plate (40) attached to the cushion plate (31) so as to be movable forward or backward relative to the cushion plate (31), a specific section of the auxiliary plate (40) formed as a push-out section (70) protruding forward when a distance between an upper edge and a lower edge of the auxiliary plate (40) is shortened by moving the lower edge upward. Elasticity of the auxiliary plate (40) supporting the body of the seated passenger is adjusted by moving the auxiliary plate (40) near the push-out section (70) forward or backward. The push-out section (70) has a corrugated part (71) formed from a sideways projection that projects forward or/and backward as viewed from a side.