Abstract: A structure of operation portion of height adjuster of vehicle seat is provided, in which a brake unit associated with the height adjuster and a support element on which a control lever is mounted are disposed. Further, a transmission mechanism of parallel linkage structure with four articulation points is operatively connected between the brake unit and support element. According thereto, the control lever has operative connection with the brake unit via four articulation points of three link members, such that two of the link members are pivotally connected with the respective brake unit and support element, maintaining parallel relation with each other, while other remaining one of the link members is pivotally connected between those two link members.

Abstract: A structure of operation portion of height adjuster of vehicle seat is provided, in which a brake unit associated with the height adjuster and a support element on which a control lever is mounted are disposed. Further, a transmission mechanism of parallel linkage structure with four articulation points is operatively connected between the bake unit and support element. According thereto, the control lever has operative connection with the brake unit via four articulation points of three link members, such that two of the link members are pivotally connected with the respective brake unit and support element, maintaining parallel relation with each other, while other remaining one of the link members is pivotally connected between those two link members.

Abstract: Unlocking mechanism of reclining device features an angularly movable stabilizer link mechanism of four-point articulated link structure which comprises a first link member connected with a remote lock control device, a second link member and a third link member. The second link member is pivotally connected with a shaft of the reclining device and one end of the first link member. The third link member is pivotally connected with seat back side and another end of the first link member. With inclination of seat back, the second and third link members are moved angularly relative to the reclining device shaft so as to retain the first link member at fixed horizontal position. Operation of the remote lock control device causes rotation of the first link member away from such fixed horizontal position, thereby causing rotation of the shaft to unlock the reclining device, irrespective of the inclination of seat back.