Aisin Seiki Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Hirofumi Kume

Takemi Hattori

Takeshi Yamawaki

A lumbar support structure of the present invention includes a cam means rotatably supported on bracket to which one end of torsion spring is pivoted. The cam means is actuated by a lever on the side of the seatback to vertically move the lumbar support through cable member connecting the two. The lumbar support structure further includes a cam member pivoted to the bracket and movable in response to caming action of the cam means, and the support plate which is adjustably rotated upon the movement of cam member so that the support plate may be vertically movable to change the contact position with the seatback.

Adjustable lumbar support

A seat frame wherein erect walls constituting the peripheral wall of the seat frame are bent to form columnar reinforcement ribs, and flange portions being the upper end faces of the reinforcement ribs are formed with mounting parts for a spring base, so that even when the peripheral wall of the seat frame is subjected to an intense tensile load inwards, it is prevented from turning inwardly to be deformed or damaged.

Growing community of inventors

Toyota, Japan

Hirofumi Kume