A seat cushion includes a cushion rear portion forming a rear portion of the seating surface, a cushion front portion forming a front portion of the seating surface and being configured to approach and separate from the cushion rear portion in a front-rear direction by a cushion length variable mechanism, a cushion cover covering the cushion front portion and the cushion rear portion, a retraction member disposed over a cover back surface of the cushion cover to a first member, and a push-in member provided on a second member, and configured to push the retraction member by the cushion front portion approaching the cushion rear portion, thereby retracting the cushion cover into a gap between the cushion front portion and the cushion rear portion with the retraction member.

A seat cushion includes a cushion rear portion forming a rear portion of the seating surface, a cushion front portion forming a front portion of the seating surface and being configured to approach and separate from the cushion rear portion in a front-rear direction by a cushion length variable mechanism, a cushion cover covering the cushion front portion and the cushion rear portion, a retraction member disposed over a cover back surface of the cushion cover to a first member, and a push-in member provided on a second member, and configured to push the retraction member by the cushion front portion approaching the cushion rear portion, thereby retracting the cushion cover into a gap between the cushion front portion and the cushion rear portion with the retraction member.

There is provided a skin foam-in-place foamed article comprising a pad (15) and a bag-like outer material (20) covering the pad (15). The outer material (20) has a top layer (21) and a liner layer (22) made of a foamed resin. The liner layer (22) has a closed cell structure. A pad-side skin layer (27a) having a density higher than that of a bulk layer (26) is provided on the liner layer (22), on a side of the pad (15). A corona treatment is applied to the pad-side skin layer (27a).

There is provided a skin foam-in-place foamed article comprising a pad (15) and a bag-like outer material (20) covering the pad (15). The outer material (20) has a top layer (21) and a liner layer (22) made of a foamed resin. The liner layer (22) has a closed cell structure. A pad-side skin layer (27a) having a density higher than that of a bulk layer (26) is provided on the liner layer (22), on a side of the pad (15). A corona treatment is applied to the pad-side skin layer (27a).

A method for manufacturing a covering system for a motor vehicle seat member includes the steps of: providing a support, a cover and a pad; associating the support with the cover, the pad being left free between the support and the cover; and creating longitudinal seam lines, one on either side of the pad. The longitudinal seam lines join together the support and the cover. The longitudinal seam lines form straight segments, extending in a transverse direction towards the first pad, and join together the support, the cover, and the first pad.

Provided is a composite material for vehicles capable of substantially preventing the occurrence of wrinkles caused by ease stitching. This composite material for vehicles is a layered product of a skin material and a polyurethane foam sheet. The skin material has a play structure which, when the composite material for vehicles is stitched, allows the skin material to follow deformation caused by the stitching with a smooth state of a surface of the skin material maintained. The skin material is a woven fabric including warp yarns and weft yarns. The warp yarns and/or the weft yarns include two or more types of yarns having different total finenesses, and form the play structure.

To improve the seated feeling of an occupant in a seat having partially different hardness, a vehicle seat includes a seat frame, an S spring which is installed on the seat frame and receives a load of an occupant, and a seat back pad which has a plurality of regions respectively formed of different materials and is disposed between a skin material of the seat and the S spring. The S spring is disposed at a position facing a boundary portion which is provided in the seat back pad and is the plurality of regions respectively formed of different materials.

To improve the seated feeling of an occupant in a seat having partially different hardness, a vehicle seat includes a seat frame, an S spring which is installed on the seat frame and receives a load of an occupant, and a seat back pad which has a plurality of regions respectively formed of different materials and is disposed between a skin material of the seat and the S spring. The S spring is disposed at a position facing a boundary portion which is provided in the seat back pad and is the plurality of regions respectively formed of different materials.

A seat system has a seat cover and at least one transmitting antenna and at least one receiving antenna. Additionally, located within the system is a transmitting antenna transmitting a signal that is 180 degrees out of phase with respect to the signal transmitted from the other at least one transmitting antenna. The signal that is 180 degrees out of phase can alter measurements of signals received by the receiving antenna. There can also be a source of ground located within the seat system that is able to alter measurements of signals received by the receiving antenna.

A seat system has a seat cover and at least one transmitting antenna and at least one receiving antenna. Additionally, located within the system is a transmitting antenna transmitting a signal that is 180 degrees out of phase with respect to the signal transmitted from the other at least one transmitting antenna. The signal that is 180 degrees out of phase can alter measurements of signals received by the receiving antenna. There can also be a source of ground located within the seat system that is able to alter measurements of signals received by the receiving antenna.