Abstract: A vehicle seat includes a seat cushion including a cover, a frame and a pad, a plurality of parts of the cover being restrained to the frame and the pad; a cushion airbag device mounted in a front portion in the seat cushion and configured to inflate and deploy an airbag at a time of a frontal collision of a vehicle; and a restraint release part provided in a part of the cover positioned at at least one side in a seat front-rear direction with respect to the cushion airbag device among the plurality of parts of the cover. The restraint release part is configured to release the restraint of the part of the cover with an inflation pressure of the airbag.

Abstract: Provided is a lumbar support device that can reduce a cost involved. One aspect of the present disclosure is a lumbar support device including a base, a pressure-receiving plate arranged at a seat-front side relative to the base, a hinge mechanism moving the pressure-receiving plate in seat front-rear directions, and a lead screw causing the hinge mechanism to be operable. The hinge mechanism includes a first paddle and a second paddle pivoting about a hinge pin in the seat front-rear directions. The first paddle includes a first pressing portion pressing the pressure-receiving plate toward the seat-front side and a first coupling portion coupled to a lead screw so as to be shifted in a seat-width direction as the lead screw rotates. The second paddle includes a second pressing portion pressing the pressure-receiving plate toward the seat-front side and a second coupling portion rotatably coupled to the based.

Abstract: Provided is a lumbar support device that can reduce a cost involved. One aspect of the present disclosure is a lumbar support device including a base, a pressure-receiving plate arranged at a seat-front side relative to the base, a hinge mechanism moving the pressure-receiving plate in seat front-rear directions, and a lead screw causing the hinge mechanism to be operable. The hinge mechanism includes a first paddle and a second paddle pivoting about a hinge pin in the seat front-rear directions. The first paddle includes a first pressing portion pressing the pressure-receiving plate toward the seat-front side and a first coupling portion coupled to a lead screw so as to be shifted in a seat-width direction as the lead screw rotates. The second paddle includes a second pressing portion pressing the pressure-receiving plate toward the seat-front side and a second coupling portion rotatably coupled to the based.

Abstract: A vehicle seat includes a seat cushion including a cover, a frame and a pad, a plurality of parts of the cover being restrained to the frame and the pad; a cushion airbag device mounted in a front portion in the seat cushion and configured to inflate and deploy an airbag at a time of a frontal collision of a vehicle; and a restraint release part provided in a part of the cover positioned at at least one side in a seat front-rear direction with respect to the cushion airbag device among the plurality of parts of the cover. The restraint release part is configured to release the restraint of the part of the cover with an inflation pressure of the airbag.

Abstract: A vehicle seat that can reduce the mass of a side frame without significantly reducing the mechanical strength of the side frame is provided. The vehicle seat comprises a back frame that comprises a side frame that extends substantially vertically, and a recliner that is coupled to a lower end of the side frame and configured so that the back frame is pivotable. The side frame comprises a side frame body that comprises a closed cross-section portion and extends from an upper end of the side frame to the recliner, and a reinforcing member that extends to the recliner from a point between a first and a second end of the side frame body along an extension axis of the side frame body and is fixed to the side frame body with at least a part of the reinforcing member being inserted into the closed cross-section portion.

Abstract: A vehicle seat that can reduce the mass of a side frame without significantly reducing the mechanical strength of the side frame is provided. The vehicle seat comprises a back frame that comprises a side frame that extends substantially vertically, and a recliner that is coupled to a lower end of the side frame and configured so that the back frame is pivotable. The side frame comprises a side frame body that comprises a closed cross-section portion and extends from an upper end of the side frame to the recliner, and a reinforcing member that extends to the recliner from a point between a first and a second end of the side frame body along an extension axis of the side frame body and is fixed to the side frame body with at least a part of the reinforcing member being inserted into the closed cross-section portion.

Abstract: In a conveyance seat, a columnar engaging portion protruding from a rear surface of an additional member is moved toward a seat back while being in contact with a seat cushion, and the engaging portion is inserted between the seat cushion and the seat back, and is engaged with an engaged portion disposed between the seat cushion and the seat back. The seat pad includes a general portion that elastically supports an occupant, and a compression portion that is compressed more easily than the general portion. The compression portion contacts and supports the seat cover, and is disposed on a movement path of the engaging portion such that the engaging portion is moved toward the engaged portion and is engaged with the engaged portion while compressing the compression portion.

Abstract: A seat component positioning structure includes a component of a conveyance seat; a floor having a positioning hole; and a locate pin provided in the component. The component is positioned by inserting the locate pin through the positioning hole in the floor. The locate pin includes a distal-side large diameter portion, a base-side large diameter portion, and a small diameter portion disposed between the distal-side large diameter portion and the base-side large diameter portion. When the component is fixed to the floor, a portion of the base-side large diameter portion faces a peripheral surface around the positioning hole in the floor. A resin layer is provided on a surface of the portion of the base-side large diameter portion, the portion facing the peripheral surface around the positioning hole in the floor when the component is fixed to the floor.

Abstract: In a conveyance seat, a columnar engaging portion protruding from a rear surface of an additional member is moved toward a seat back while being in contact with a seat cushion, and the engaging portion is inserted between the seat cushion and the seat back, and is engaged with an engaged portion disposed between the seat cushion and the seat back. The seat pad includes a general portion that elastically supports an occupant, and a compression portion that is compressed more easily than the general portion. The compression portion contacts and supports the seat cover, and is disposed on a movement path of the engaging portion such that the engaging portion is moved toward the engaged portion and is engaged with the engaged portion while compressing the compression portion.

Abstract: A seat component positioning structure includes a component of a conveyance seat; a floor having a positioning hole; and a locate pin provided in the component. The component is positioned by inserting the locate pin through the positioning hole in the floor. The locate pin includes a distal-side large diameter portion, a base-side large diameter portion, and a small diameter portion disposed between the distal-side large diameter portion and the base-side large diameter portion. When the component is fixed to the floor, a portion of the base-side large diameter portion faces a peripheral surface around the positioning hole in the floor. A resin layer is provided on a surface of the portion of the base-side large diameter portion, the portion facing the peripheral surface around the positioning hole in the floor when the component is fixed to the floor.