Provided is a conveyance seat configured for adjustment of a deflection amount of a seat forming the conveyance seat, i.e., cushion properties of the seat. The conveyance seat includes a seat frame and a buffering body bridged over the seat frame configured to elastically support a seated occupant. The buffering body has a wire having both end portions attached to the seat frame, and a back restriction member configured to support at least a portion of the wire to restrict deflection of the portion of the wire. The wire includes a first right-to-left extending portion and a second right-to-left extending portion that extend in a seat right-to-left direction, and a coupling portion coupling the first right-to-left extending portion and the second right-to-left extending portion. The back restriction member is made of a resin material, and supports the first right-to-left extending portion and the second right-to-left extending portion.

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 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 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 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 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 of the seat includes a side frame extending in a fore and aft direction, and the side frame includes a first member including a channel member having an open side facing sideways and a second member 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 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.

Provided is a conveyance seat configured for adjustment of a deflection amount of a seat forming the conveyance seat, i.e., cushion properties of the seat. The conveyance seat includes a seat frame and a buffering body bridged over the seat frame configured to elastically support a seated occupant. The buffering body has a wire having both end portions attached to the seat frame, and a back restriction member configured to support at least a portion of the wire to restrict deflection of the portion of the wire. The wire includes a first right-to-left extending portion and a second right-to-left extending portion that extend in a seat right-to-left direction, and a coupling portion coupling the first right-to-left extending portion and the second right-to-left extending portion. The back restriction member is made of a resin material, and supports the first right-to-left extending portion and the second right-to-left extending portion.

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.

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 of the seat includes a side frame extending in a fore and aft direction, and the side frame includes a first member including a channel member having an open side facing sideways and a second member 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.