An adequate mechanical stiffness and strength are afforded to a tumble seat or a vehicle seat having a latch mechanism provided in a rear end of the seat cushion. A cushion frame (F1) of the seat includes a side frame (5) extending in a fore and aft direction, and the side frame includes a first member (10) comprising a channel member having an open side facing sideways and a second member (11) attached to the first member so as to form a closed cross section jointly with the first member, and extending downward further than the first member. A latch mechanism is positioned under the first member and attached to the second member.

An occupant support adapted for use in a vehicle includes a seat mount, a seat, and a motion-sickness mitigation system. The seat mount is adapted to couple to the vehicle for movement with the vehicle. The seat is adapted to provide a comfortable support surface for an occupant of the occupant support.

A seat for a vehicle includes a seat back frame, a first elastic member, and a second elastic member. The seat back frame includes a main frame and a sub-frame. The first elastic member and the second elastic member are configured to support the sub-frame such that the sub-frame is rotatable in a width direction of the seat and are mounted between the main frame and upper end portions of the sub-frame on both sides in the width direction of the seat. Each of the first elastic member and the second elastic member has a limit of elongation and has a characteristic in which a load that is applied to the sub-frame in a rear direction of the seat acts as tension to generate a reaction force due to the limit of elongation and does not generate the reaction force in the width direction of the seat.

Suspension device for a vehicle seat, comprising an upper suspension portion and a lower suspension portion, which are interconnected by a first swivel connector and a second swivel connector, and the first and the second swivel connector are pivoted in each case about a swivel pin in the case of an oscillating movement of the upper suspension portion relative to the lower suspension portion, wherein a first toothed wheel element which is rotatable about a first axis of rotation is arranged on the first swivel connector for adjusting a position of a first spring unit, by means of which a spring force and a spring rate of the suspension device can be changed, the first toothed wheel element being in operative contact with a second toothed wheel element which is rotatable about a second axis of rotation.

A vehicle seat mounting device for reducing a risk of sustaining a spinal or back injury includes a first mounting element, which in turn comprises a pair of side members. Each side member, which comprises at least one compressible element, is attachable to a chassis so that the pair of side members defines a seating area. A crossmember is attached to and extends between the side members and across the seating area. The crossmember is attachable to a seat portion of a vehicle seat so that the vehicle seat is mounted to the chassis. The compressible elements at least partially absorb a force applied to a bottom of the chassis and substantially parallel to the side members.

An occupant support adapted for use in a vehicle includes a seat frame, a seat pad, and a suspension system. The seat frame is adapted to couple with the vehicle for movement with the vehicle. The seat pad is adapted to provide a comfortable support interface. The suspension system provides relative movement between the seat pad and the seat frame.

An occupant support adapted for use in a vehicle includes a seat frame, a seat pad, and a suspension system. The seat frame is adapted to couple with the vehicle for movement with the vehicle. The seat pad is adapted to provide a comfortable support interface. The suspension system provides relative movement between the seat pad and the seat frame.

An occupant support adapted for use in a vehicle includes a seat mount, a seat, and a motion-sickness mitigation system. The seat mount is adapted to couple to the vehicle for movement with the vehicle. The seat is adapted to provide a comfortable support surface for an occupant of the occupant support.

A body weight adjustment mechanism for automatic adjustment to a balanced point is provided to improve vibration absorption characteristics and impact absorption characteristics. A torsion angle of a lower frame-side torsion bar when an upper frame is at a balanced point is found in advance, a torsion angle of the lower frame-side torsion bar in a state in which a person is seated is detected, the detected torsion angle is compared with the aforesaid balanced point torsion angle, a control signal is sent to an elastic force adjusting unit, and torsion angles of upper frame-side torsion bars are adjusted so that the torsion angle of the lower frame-side torsion bar becomes equal to the balanced point torsion angle. The upper frame can be set to an appropriate position in an initial state and a static state in which a person is seated and vibration and impact absorption characteristics are improved.

An adequate mechanical stiffness and strength are afforded to a tumble seat or a vehicle seat having a latch mechanism provided in a rear end of the seat cushion. A cushion frame (F1) of the seat includes a side frame (5) extending in a fore and aft direction, and the side frame includes a first member (10) comprising a channel member having an open side facing sideways and a second member (11) attached to the first member so as to form a closed cross section jointly with the first member, and extending downward further than the first member. A latch mechanism is positioned under the first member and attached to the second member.