A chairback support structure includes: a back element having a plurality of insertion holes; a plurality of resilient bend plates each having a bendable portion, two insertion portions extending from two ends of the bendable portion, respectively, and two abutting portions disposed at two ends of the bendable portion, respectively, the two insertion portions being insertable into the insertion holes of the back element, and the two abutting portions being adapted to abut against the back element; and a pad for covering the back element and the resilient bend plates.

The object of the invention is to provide a vehicle seat which can improve degree of freedom in the design of the vehicle seat. A vehicle seat with a seat cushion and a seat back includes: right and left side frames 20 constituting right and left frames of the seat back; a pressure-receiving member 40 disposed between the right and left side frames 20 and configured to receive a load from an occupant; and a driving mechanism 50 disposed at each of right and left sides of the pressure-receiving member 40 and configured to cause a right end portion or a left end portion of the pressure-receiving member 40 to move from an initial position to an advanced position that is located frontward of the initial position or to move from the advanced position to the initial position, wherein the driving mechanism 50 includes a linkage (drive link member 100 and contact link member 200) configured to be connected to the pressure-receiving member 40 and a driving source 52 configured to actuate the linkage, and wherein the linkage is configured to operate when a load equal to or greater than a predetermined amount is input from the occupant to the pressure-receiving member 40 to cause the pressure-receiving member 40 to move to a backward position that is located rearward of the initial position.

To secure both flexibility and rigidity of a pressure-receiving member, a pressure-receiving member capable of moving rearward in a state of receiving a load from a back of an occupant is included in a seat back of a conveyance seat for supporting the back of the occupant. The pressure-receiving member has a load-receiving portion which receives the load from the back of the occupant at a front face, and the load-receiving portion includes a load-receiving portion piece formed so that a length in a vertical direction of the seat back is shorter than a length in a seat width direction, and a rear reinforcement rib protruding along a thickness direction of the load-receiving portion from the load-receiving portion piece and extending along the seat width direction.

A vehicle seat includes a fabric center portion, first and second bolsters, a first seam between the first bolster and the center portion, a second seam between the center portion and the second bolster, and a seat frame. First and second extension members are disposed along and coupled to the respective first and second seams. The first and second extension members are adjustable between first and second positions.

The present invention relates to a spine orienting device for integration into a variety of types of seats, for example, automotive seats or office type seating, in order to properly position the sacrum of the individual using the seat, which in turn will properly pivot the pelvis to assist in maintaining the spine in equilibrium.

A lumbar mat for a backrest structure for use in a vehicle seat, the lumbar mat adapted to be arranged between a lumbar support structure and a backrest cushion of the backrest structure, including a front surface adapted to face towards a backrest cushion of a backrest structure, when the lumbar mat is arranged in the backrest structure, a plurality of first spring elements arranged at the front surface of the lumbar mat, each of the first spring elements adapted to apply a first elastic force towards the backrest cushion via a first contact area of the first spring element, respectively, and a plurality of second spring elements, each of the second spring elements associated with a respective one of the plurality of first spring elements and adapted to apply a second elastic force towards the backrest cushion via a second contact area of the second spring element, respectively.

The object of the invention is to provide a vehicle seat which can improve degree of freedom in the design of the vehicle seat. A vehicle seat with a seat cushion and a seat back includes: right and left side frames 20 constituting right and left frames of the seat back; a pressure-receiving member 40 disposed between the right and left side frames 20 and configured to receive a load from an occupant; and a driving mechanism 50 disposed at each of right and left sides of the pressure-receiving member 40 and configured to cause a right end portion or a left end portion of the pressure-receiving member 40 to move from an initial position to an advanced position that is located frontward of the initial position or to move from the advanced position to the initial position, wherein the driving mechanism 50 includes a linkage (drive link member 100 and contact link member 200) configured to be connected to the pressure-receiving member 40 and a driving source 52 configured to actuate the linkage, and wherein the linkage is configured to operate when a load equal to or greater than a predetermined amount is input from the occupant to the pressure-receiving member 40 to cause the pressure-receiving member 40 to move to a backward position that is located rearward of the initial position.

A seating assembly includes a seatback. The seatback includes a frame extending about a periphery of the seatback. The seatback defines a thoracic region and a lumbar region. First and second supports extend from a top portion of the frame to a lower portion of the frame. A first flexible mat and a second flexible mat are operably coupled with the first and second supports. The first flexible mat is disposed proximate the thoracic region. The second flexible mat is disposed proximate the lumbar region.

The present disclosure provides a seat back including a bolster for a vehicle. The seat back may include a seat back frame including a side member formed on each of opposite sides thereof so that a left-and-right support of the seat back may be automatically adjusted. The seat back further includes a rotating plate having a structure integrally including an external plate extending into the bolster, and an internal plate extending inwardly into the seat back. A boundary portion between the external plate and the internal plate of the rotating plate may be rotatably mounted to the side member of the seat back frame.

In a vehicle seat, a seat back includes a backrest on which an occupant sitting on a seat cushion leans his/her back, and banks supporting the back of the sitting occupant on both sides. Urethane pads configuring the banks are formed in a shape protruded to the front with respect to a urethane pad configuring the backrest, the back face sides of the urethane pads configuring the banks formed in the shape protruded to the front are formed in a recessed shape with respect to a back face side of the urethane pad configuring the backrest, and on the portions of the back face sides of the urethane pads configuring the banks formed in the recessed shape, protrusions having faces at the same height as the back face side of the urethane pad configuring the backrest and extended to the portions formed in the recessed shape are formed.