Abstract: A vehicle seat (10) has a seat cushion (20) and a seat back (30), which are affixed to the body of a vehicle. The seat back (30) has: a first member (50) which is formed in a plate-like shape; and a second member (60) with a hat-shaped cross-section, which is configured so that a flange section (61) is in contact with one surface, in a thickness direction, of the first member (50). A center bead (52) is provided at the center portion of the first member (50). The center bead (52) is configured so that a longitudinal end of the center bead (52) and the second member (60) are overlapped in a plan view viewed in the thickness direction of the first member (50). As a result, the first member (50) of the seat back (30) is prevented from being deformed at the longitudinal end of the center bead (52).

Abstract: A vehicle seat (10) has a seat cushion (20) and a seat back (30), which are affixed to the body of a vehicle. The seat back (30) has: a first member (50) which is formed in a plate-like shape; and a second member (60) with a hat-shaped cross-section, which is configured so that a flange section (61) is in contact with one surface, in a thickness direction, of the first member (50). A center bead (52) is provided at the center portion of the first member (50). The center bead (52) is configured so that a longitudinal end of the center bead (52) and the second member (60) are overlapped in a plan view viewed in the thickness direction of the first member (50). As a result, the first member (50) of the seat back (30) is prevented from being deformed at the longitudinal end of the center bead (52).

Abstract: Vehicle seat of retractable type having a rotary support link mechanism, which is displaceable between upper use position and lower storage position. The rotary support link mechanism comprises a forward link element and a backward link element smaller in length than the forward link element, wherein the forward link element has upper and lower pivotal support points between the seat and a vehicle floor, while the backward link element has upper and lower pivotal support points between the seat and vehicle floor. The lower pivotal support point of the backward link element is disposed backwardly of and above the lower pivotal support point of the forward link element, and the backward link element is inclined more backwardly than the forward link element. With this arrangement, the seat can be displaced by operation of motor between the upper use position and lower storage position in a manner analogous to a manual operation.

Abstract: Vehicle seat of retractable type having a rotary support link mechanism, which is displaceable between upper use position and lower storage position. The rotary support link mechanism comprises a forward link element and a backward link element smaller in length than the forward link element, wherein the forward link element has upper and lower pivotal support points between the seat and a vehicle floor, while the backward link element has upper and lower pivotal support points between the seat and vehicle floor. The lower pivotal support point of the backward link element is disposed backwardly of and above the lower pivotal support point of the forward link element, and the backward link element is inclined more backwardly than the forward link element. With this arrangement, the seat can be displaced by operation of motor between the upper use position and lower storage position in a manner analogous to a manual operation.

Abstract: A structure of seat back frame in a seat back of a hinged vehicle seat, in which a connecting rod is extended therein for actuating a locking mechanism in one of locking and unlocking direction. In the structure, a stopper element is provided vertically of the seat back frame at a point adjacent to a crank-like portion of the connecting rod, with an engagement element disposed between the stopper element and crank-like portion. Upon an external load being applied to a rear side of the seat back, the stopper element is thereby deformed in a direction to the crank-like portion of connecting rod and brought to engagement therewith via the engagement element, so that the connecting rod is prevented against undesired rotation in the unlocking direction.