A seat assembly configured to be employed in vehicle seats such as aircraft passenger seats. The seat assembly includes a seat frame having first and second spaced frame members and first and second spaced transverse beams. A plurality of springs positioned proximate an aft end of the seat frame generally above the second transverse beam span between the first and second frame members. A support member is attached to the plurality of springs and to a seat back attachable to the seat frame. A cushion assembly mounts on the seat frame such that the aft end rests on the plurality of springs while the forward end rests on the front transverse beam. In use, as the aft end of the cushion assembly deflects downward toward the second transverse beam the forward end simultaneously rotates around the first transverse beam.

A seatback subframe is swingable laterally of the vehicle with respect to a seatback main frame. A backrest is attached to the seatback subframe. Side airbag modules are attached to the seatback subframe at side edges.

A mat mounting structure for mounting a mat on a seat back frame in a seat back may have a guide wire attachable to the mat configured to receive a force from a back of an occupant on the seat back. The guide wire may have a straight part extending linearly in a longitudinal direction of the seat back frame on a head side or a root side of the seat back frame. A bushing including a penetration hole in which the straight part is insertable in the longitudinal direction may be included in the structure. An attachment hole part in the seat back frame may also be part of the structure. The bushing may be detachably engageable with and attachable to the attachment hole part.

A seat frame side member includes a frame body and a structural attachment point configured to connect a seat feature to the seat frame side member. The structural attachment point includes a projection extending from the frame body to a distal end. The projection includes a seat feature receiving portion at the distal end of the projection and a seat feature seating portion between the seat feature receiving portion and the frame body, and the seat feature receiving portion has a cross-sectional thickness that is different from a cross-sectional thickness of the seat feature seating portion. The seat frame side member can have an anisotropic microstructure with a plurality of layers built by additive manufacturing.

There is provided a vehicle seat including: a seat back frame standing from a seat rear end side of a seat cushion, a left and right pair of cushion frames, the seat back frame being supported to be tiltable in a seat front-and-rear direction, and the seat back frame structuring a framework of a seat back; and a seat back panel that is provided at the seat rear side of the seat back frame, an upper frame structuring an upper end portion at the seat rear side of the seat back frame, an upper end portion of the seat back panel being disposed at the seat upper side relative to the upper frame, and the seat back panel displacing toward the seat lower side when an impact load is applied from the upper side of the seat back.

A sensor-equipped seat detecting various parameters and determining a change in physical condition of a seated occupant includes: a surface temperature sensor detecting a seat surface temperature on a seated occupant side and acquiring surface temperature data; an outside air temperature sensor detecting the seat body outside temperature and acquiring outside air temperature data; and a controller having a calculation unit calculating the degree of change in temperature difference from the surface temperature data and the outside air temperature data and a wakefulness determination unit determining a wakefulness state of the seated occupant based on the degree of change. The calculation unit calculates the degree of change in temperature difference from the seat surface temperature in the surface temperature data and the outside air temperature in the outside air temperature data, the degree of data. The wakefulness determination unit determines the wakefulness state of the seated occupant on the degree of change.

A seat cushion includes a seat cushion base layer which biases two base support parts in directions approaching each other, and has base support part elastic members which are elastically deformed in an up-down direction, thereby causing the seat cushion to have a configuration having a high spring characteristic. In the seat cushion and the seat back, the seat cushion is configured to be set to be larger than the seat back regarding a range of connecting an origin, a maximum displacement point, and a maximum load point, and a ratio of an area of a range including an inward curve to an area of a range including an outward curve in a predetermined load-deflection characteristic.

A seat cushion includes a seat cushion base layer which biases two base support parts in directions approaching each other, and has base support part elastic members which are elastically deformed in an up-down direction, thereby causing the seat cushion to have a configuration having a high spring characteristic. In the seat cushion and the seat back, the seat cushion is configured to be set to be larger than the seat back regarding a range of connecting an origin, a maximum displacement point, and a maximum load point, and a ratio of an area of a range including an inward curve to an area of a range including an outward curve in a predetermined load-deflection characteristic.

A vehicle seat includes a pair of side frames disposed separately from each other in a lateral direction; a pair of connecting frames disposed separately from each other to connect the pair of side frames; and a supporting member including hook portions hooked on the pair of connecting frames, the supporting member being laid to bridge the pair of connecting frames, and configured to support an occupant, wherein a tubular member in which a connecting frame is disposed is provided in a position between the hook portions and the side frames. The tubular member is configured to contact the hook portion to thereby restrict a position of the supporting member in the lateral direction.

Vehicle seat element for a vehicle seat having a residual spring travel adjustment device, the vehicle seat element having a first fastening eye, it being possible to introduce the residual spring travel adjustment device into the first fastening eye and the residual spring travel adjustment device having a fastening eye insert having an eccentric hole.