Abstract: The present disclosure describes a seat frame including a waist portion supporting member having a smaller size while stably supporting a waist portion of an occupant. A vehicle seat frame serving as a frame for a vehicle seat includes a seat cushion frame forming a frame of a sitting part of the vehicle seat, a seatback frame forming a frame of a backrest part of the vehicle seat, and a waist portion supporting member coupled to a lower frame which is included in the seatback frame. The waist portion supporting member has a coupling region extending in the seat width direction, the coupling region being coupled to the lower frame, and a waist portion supporting region extending from the coupling region toward the seat cushion frame and supporting a waist portion of an occupant. The waist portion supporting region is longer in the seat width direction than the coupling region.

Abstract: The present disclosure describes a seat frame including a waist portion supporting member having a smaller size while stably supporting a waist portion of an occupant. A vehicle seat frame serving as a frame for a vehicle seat includes a seat cushion frame forming a frame of a sitting part of the vehicle seat, a seatback frame forming a frame of a backrest part of the vehicle seat, and a waist portion supporting member coupled to a lower frame which is included in the seatback frame. The waist portion supporting member has a coupling region extending in the seat width direction, the coupling region being coupled to the lower frame, and a waist portion supporting region extending from the coupling region toward the seat cushion frame and supporting a waist portion of an occupant. The waist portion supporting region is longer in the seat width direction than the coupling region.

Abstract: The present disclosure describes a seat frame including a waist portion supporting member having a smaller size while stably supporting a waist portion of an occupant. A vehicle seat frame serving as a frame for a vehicle seat includes a seat cushion frame forming a frame of a sitting part of the vehicle seat, a seatback frame forming a frame of a backrest part of the vehicle seat, and a waist portion supporting member coupled to a lower frame which is included in the seatback frame. The waist portion supporting member has a coupling region extending in the seat width direction, the coupling region being coupled to the lower frame, and a waist portion supporting region extending from the coupling region toward the seat cushion frame and supporting a waist portion of an occupant. The waist portion supporting region is longer in the seat width direction than the coupling region.

Abstract: A seat frame for a vehicle seat includes a seat cushion frame that forms a frame for a seating portion of the vehicle seat, and a height adjustment mechanism that is coupled to the seat cushion frame and a rail mechanism of the vehicle seat. The height adjustment mechanism adjusts the height of the seat cushion frame. The height adjustment mechanism includes a sector gear that rotates based on a height adjustment operation, a link that moves the height of the seat cushion frame up and down based on the rotation of the sector gear, and a restriction member that abuts against the sector gear, thereby restricting the movement of the sector gear. At least one of portions of the sector gear and the restriction member that abut against each other has a tapered shape.

Abstract: A vehicle seat that can reduce manufacturing costs while increasing assembling rigidity of an elastic spring for supporting an occupant is described. A vehicle seat includes an elastic spring bridged between a front frame and a rear frame to support an occupant. A hook member is attached to a rear end portion of the elastic spring to be hooked to the rear frame. The hook member includes a hook body extending along an outer periphery of the rear frame and a projection projecting from a front edge of the hook body toward the rear frame and formed to have a width smaller than a width of the hook body. A through-hole is formed in a portion of the hook body, which is opposed to the projection. The through-hole has a width larger than a width of the projection and a length larger than a projecting length of the projection.

Abstract: A vehicle seat that can reduce manufacturing costs while increasing assembling rigidity of an elastic spring for supporting an occupant is described. A vehicle seat includes an elastic spring bridged between a front frame and a rear frame to support an occupant. A hook member is attached to a rear end portion of the elastic spring to be hooked to the rear frame. The hook member includes a hook body extending along an outer periphery of the rear frame and a projection projecting from a front edge of the hook body toward the rear frame and formed to have a width smaller than a width of the hook body. A through-hole is formed in a portion of the hook body, which is opposed to the projection. The through-hole has a width larger than a width of the projection and a length larger than a projecting length of the projection.

Abstract: A seat frame for a vehicle seat includes a seat cushion frame that forms a frame for a seating portion of the vehicle seat, and a height adjustment mechanism that is coupled to the seat cushion frame and a rail mechanism of the vehicle seat. The height adjustment mechanism adjusts the height of the seat cushion frame. The height adjustment mechanism includes a sector gear that rotates based on a height adjustment operation, a link that moves the height of the seat cushion frame up and down based on the rotation of the sector gear, and a restriction member that abuts against the sector gear, thereby restricting the movement of the sector gear. At least one of portions of the sector gear and the restriction member that abut against each other has a tapered shape.