A vehicle seat includes right and left side frames 10, and an elastic member (cushion spring 20) run between the right and left side frames 10. The right and left side frames 10 include side walls 11 disposed opposite to each other in a lateral direction, and flange portions (upper flange portions 12) respectively extending laterally inward from the side walls 11, and the elastic member is attached to the flange portions.

A vehicle seat assembly has a seat bottom frame, a seat suspension structure, a strap structure and a cushion material. The seat suspension structure is fixed to the seat bottom frame and extends through a seat cushion receiving area of the seat bottom frame. The strap structure is attached to one of a front frame portion of the seat bottom frame and a front end of the seat suspension structure, and is attached to one of a rear frame portion and a rear end of the seat suspension structure. The strap structure extends through the seat cushion receiving area and is slack with a passenger seated on the cushion material. Downward movement of the seat cushion in response to a rapid change in momentum causes the strap structure to become taught restricting further downward movement of the passenger.

A sheet cushioning member includes front links coupled to a front torsion bar and rear links coupled to a rear torsion bar are arranged at a predetermined interval from each other in a front and rear direction of a seat, and when a predetermined load or larger is applied, the front links and the rear links rotate in opposite directions, and dampers are disposed to extend between lower portions of the front links and the rear links. When a predetermined load fluctuation or larger occurs, the dampers expand or contract to exhibit a damping force, and a load fluctuation smaller than this does not cause the dampers to expand or contract and is alleviated by elasticity of the front torsion bar and the rear torsion bar. An impact absorbing characteristic is thereby improved with a simple structure.

There is provided a vehicle seat including a seat frame which supports a load of a sitting passenger, a seat pad which is set on the seat frame and receives the load of the sitting passenger to be relieved, and a support body which is supported to the seat frame and supports a part of the seat pad from a backside thereof. The support body is supported to the seat frame to be slidable in an in-plane direction of a plane supporting the load of the sitting passenger or to be axially rotatable in an out-of-plane direction of the plane, such that the load of the sitting passenger can be relieved. The seat pad includes a fixed part which is supported to the seat frame at a fixed position and a movable part which is supported to the support body to be movable.

Provided is a conveyance seat with which the assemblability of a wire member with respect to a seat frame can be improved. A conveyance seat includes a seat frame. The seat frame has: a pair of side frames arranged in side portions of the conveyance seat; and a cross-linking frame cross-linking the pair of side frames, a wire member is disposed between the pair of side frames, the cross-linking frame has a wire receiving portion receiving the wire member, and the wire member is fastened to the wire receiving portion.

A chair includes: a cushion member; a spring member disposed along the cushion member; and a vibrator disposed between the cushion member and the spring member. The vibrator includes a fixer that fixes the vibrator to the spring member. The vibrator vibrates the spring member based on an input electrical signal.

A seat cushion applied to a vehicle seat is provided. The seat cushion of the present disclosure includes a first support member for supporting an occupant that is situated in a central portion of the seat cushion in seat-width directions and that is elastically deformable, and at least two second support members for supporting the occupant that are separately situated on a first end side and a second end side of the seat cushion in the seat-width directions and that are elastically deformable. The at least two second support members are configured to generate a reaction force greater than a reaction force generated in the first support member.