Abstract: A seat back structure for a vehicle according to one aspect of the present invention including a headrest, a seat back frame, a pad disposed in front of a surface of the seat back frame, a backrest surface of the pad, and right and left side supports each provided on either side of the backrest surface in a seat width direction, in which a right slit portion and a left slit portion are provided between the backrest surface and the right and the left side supports, respectively, each of the right slit portion and the left slit portion penetrating the pad in the thickness direction of the pad and extending in a vertical direction of the pad, and the right and the left slit portions are spaced apart from each other in the seat width direction.

Abstract: Provided is a vehicle seat having a high absorbing efficiency of impact energy upon rear end collision. The vehicle seat includes a pair of side frames that are arranged on the side, and lower frames and that connect lower portions of the pair of side frames to each other, in which a narrow portion including: a horizontal portion formed inside the pair of side frames along a longitudinal direction with a flexibility against a load equal to or more than a predetermined impact load, and an inclined portion extending from the horizontal portion via a bent portion inside the pair of side frames is formed on the lower frames.

Abstract: Provided is a vehicle seat capable of efficiently absorbing impact energy generated upon a rear end collision in a manner such that the vehicle seat is stably deformed at a specific position with respect to a complex input load generated upon a rear end collision. A vehicle seat includes: frame side portions that are located at the right and left sides of a seat back frame and extend in the up to down direction; and frame extension portions that extend from the frame side portions toward the inside in the right and left direction. A connection portion that connects the frame side portions to the frame extension portions is provided with a deformation portion that is deformed when an impact load is applied thereto. The deformation portion is formed adjacent to other deformation portions having deformation characteristics different from that of the deformation portion.

Abstract: A seat back structure for a vehicle according to one aspect of the present invention including a headrest, a seat back frame, a pad disposed in front of a surface of the seat back frame, a backrest surface of the pad, and right and left side supports each provided on either side of the backrest surface in a seat width direction, in which a right slit portion and a left slit portion are provided between the backrest surface and the right and the left side supports, respectively, each of the right slit portion and the left slit portion penetrating the pad in the thickness direction of the pad and extending in a vertical direction of the pad, and the right and the left slit portions are spaced apart from each other in the seat width direction.

Abstract: Provided is a vehicle seat capable of efficiently absorbing impact energy generated upon a rear end collision in a manner such that the vehicle seat is stably deformed at a specific position with respect to a complex input load generated upon a rear end collision. A vehicle seat includes: frame side portions that are located at the right and left sides of a seat back frame and extend in the up to down direction; and frame extension portions that extend from the frame side portions toward the inside in the right and left direction. A connection portion that connects the frame side portions to the frame extension portions is provided with a deformation portion that is deformed when an impact load is applied thereto. The deformation portion is formed adjacent to other deformation portions having deformation characteristics different from that of the deformation portion.

Abstract: A method of assembling a vehicle seat is provided, comprising: providing a seat back frame; forwardly movably connecting a headrest for supporting a head of a seat occupant to the seat back frame; mounting a rear-end collision detector to the seat back frame at a position behind the seat occupant, operatively connecting the rear-end collision detector to the headrest; disposing a link member at a position lateral to the rear-end collision detector; forming a front extending portion that inwardly extends in a right-to-left direction at a front end of a lateral face of the side frame; and forming a rear extending portion that inwardly extends in the right-to-left direction; wherein a protruding portion is formed from a portion of the lateral face of the side frame that faces at least the part of the bracket, the link support shaft being disposed at a same height as the protruding portion.

Abstract: Provided is a vehicle seat capable of efficiently absorbing impact energy generated upon a rear end collision in a manner such that the vehicle seat is stably deformed at a specific position with respect to a complex input load generated upon a rear end collision. A vehicle seat includes: frame side portions that are located at the right and left sides of a seat back frame and extend in the up to down direction; and frame extension portions that extend from the frame side portions toward the inside in the right and left direction. A connection portion that connects the frame side portions to the frame extension portions is provided with a deformation portion that is deformed when an impact load is applied thereto. The deformation portion is formed adjacent to other deformation portions having deformation characteristics different from that of the deformation portion.

Abstract: A vehicle seat is provided comprising: a seat back frame having a side frame; a headrest for supporting a head of a seat occupant; a load receiving member disposed behind the seat occupant and movable rearward in response to a load from the seat occupant; and a link member mounted to the seat back frame and rearwardly movable; wherein: a rearward movement of the load receiving member moves the link member rearward and reduces a distance between the head of the seat occupant and the headrest; the load receiving member is provided with a first through-hole and a second through-hole; and the first through-hole and the second through-hole are disposed in a same horizontal plane.

Abstract: The vehicle seat includes a collision sensor provided to a seat back frame and being movable relatively backward by a rear-end collision, a headrest attached to the seat back frame and being movable between a normal support position and a head protection position anterior to the normal support position. The headrest is movable from the normal support position to the head protection position when the collision sensor is moved backward. The vehicle seat has a lock mechanism attached to the seat back frame. The lock mechanism is moved to a lock position by inertia when receiving an external force by a rear-end collision to regulate a return of the headrest from the head protection position to the normal support position.

Abstract: A backrest frame is provided with a cushion plate of one substantially square plate form positioned behind the waist from the upper part of the back of a vehicle seat occupant, movably back and forth by way of a plurality of upper and lower parallel seat springs, one end of either one of a pair of right and left seat springs of the plurality of upper and lower parallel seat springs is connected to a pair of lower link mechanisms provided rotatably on the backrest frame, and a rear end collision sensor is formed by the cushion plate between the seat springs for moving a headrest forward, and a coupling part of the other end of the seat spring is directly attached to the lower link mechanism.

Abstract: A vehicle seat is provided comprising a seat back frame having right and left side frames, a headrest for supporting a head of a seat occupant, and a back-and-forth movable plate member provided inside a backrest that is positioned at a rear of the seat occupant, wherein a backward movement of the plate reduces a distance between the head of the seat occupant and the headrest. The plate is attached to each side frame through a link member and a link support shaft swingably supports the link member. A bracket member that supports the link support shaft and is attached to the side frame.

Abstract: A seat back structure for a vehicle according to one aspect of the present invention including a headrest, a seat back frame, a pad disposed in front of a surface of the seat back frame, a backrest surface of the pad, and right and left side supports each provided on either side of the backrest surface in a seat width direction, in which a right slit portion and a left slit portion are provided between the backrest surface and the right and the left side supports, respectively, each of the right slit portion and the left slit portion penetrating the pad in the thickness direction of the pad and extending in a vertical direction of the pad, and the right and the left slit portions are spaced apart from each other in the seat width direction.

Abstract: A vehicle seat comprises a seat bottom frame 2 as a frame of a seat bottom allowing an occupant to sit thereon, and a seat back frame 1 supported by the seat bottom frame 2. The seat back frame 1 includes right and left side frames SF laterally spaced apart from each other, and a lower connecting member 30 disposed and extending between lower portions of the right and left side frames SF and configured to connect the right and left side frames SF, and the lower connecting member 30 includes a rear wall portion connected to and supported by the side frames SF, and a front wall portion 31 disposed frontward of the rear wall portion and extending downward from an upper end of the rear wall portion, and a front surface 31A of the front wall portion 31 has an upper portion and a lower portion which is located frontward of the upper portion.

Abstract: Provided is a vehicle seat having a high absorbing efficiency of impact energy upon rear end collision. The vehicle seat includes a pair of side frames that are arranged on the side, and lower frames and that connect lower portions of the pair of side frames to each other, in which a narrow portion including: a horizontal portion formed inside the pair of side frames along a longitudinal direction with a flexibility against a load equal to or more than a predetermined impact load, and an inclined portion extending from the horizontal portion via a bent portion inside the pair of side frames is formed on the lower frames.

Abstract: The vehicle seat of the invention has an active headrest mechanism for moving the headrest forward in the event of a rear-end collision. The active headrest mechanism is composed of a headrest support part in lateral direction provided with a vertical engaging part for supporting a pillar of the headrest, and an upside link mechanism for moving the headrest support part ahead of the backrest, and the upside link mechanism is mounted on the upper frame of one plate of the backrest frame by way of a bracket.

Abstract: A vehicle seat comprises a rectangular-shaped seat back frame having right and left side frames; a headrest for supporting a head of a seat occupant that is installed within the vehicle seat; a rear-end collision detector mounted to the seat back frame at a position behind the seat occupant, wherein the rear-end collision detector detects rearward movement of the seat occupant and moves rearward; a link member that supports the rear-end collision detector with the seat back frame therethrough; and a biasing member that biases the link member; wherein: the rear-end collision detector acts such that the rearward movement of the rear-end collision detector reduces a distance between a head of the seat occupant and the headrest, and a lower end portion of the biasing member is coupled to a rear portion of the side frame and disposed posterior to the rear-end collision detector.

Abstract: A vehicle seat is provided comprising a seat back frame having right and left side frames, a headrest for supporting a head of a seat occupant, and a back-and-forth movable body provided inside a backrest that is positioned at a rear of the seat occupant, wherein a backward movement of the back-and-forth movable body forwardly moves the headrest to support the head of the seat occupant. The back-and-forth movable body is attached to each side frame through a link member and is provided with a backward protrusion protruding backward, and the backward protrusion extends laterally.

Abstract: A backrest frame 5 is provided with a cushion plate 31 of one substantially square plate form positioned behind the waist from the upper part of the back of a vehicle seat occupant, movably back and forth by way of a plurality of upper and lower parallel seat springs, one end of either one of a pair of right and left seat springs 34B of the plurality of upper and lower parallel seat springs is connected to a pair of lower link mechanisms 35 provided rotatably on the backrest frame 5, and a rear end collision sensor 40 is formed by the cushion plate 31 between the seat springs 34B for moving a headrest 4 forward, and a coupling part 39 of the other end of the seat spring 34B is directly attached to the lower link mechanism 35.

Abstract: A vehicle seat is provided comprising a seat back frame having right and left side frames, a headrest for supporting a head of a seat occupant, and a back-and-forth movable body provided inside a backrest that is positioned at a rear of the seat occupant, wherein a backward movement of the back-and-forth movable body forwardly moves the headrest to support the head of the seat occupant. The back-and-forth movable body is attached to each side frame through a link member and is provided with a backward protrusion protruding backward, and the backward protrusion extends laterally.

Abstract: A vehicle seat comprises a rectangular-shaped seat back frame having right and left side frames; a headrest for supporting a head of a seat occupant that is installed within the vehicle seat; a rear-end collision detector mounted to the seat back frame at a position behind the seat occupant, wherein the rear-end collision detector detects rearward movement of the seat occupant and moves rearward; a link member that supports the rear-end collision detector with the seat back frame therethrough; and a biasing member that biases the link member; wherein: the rear-end collision detector acts such that the rearward movement of the rear-end collision detector reduces a distance between a head of the seat occupant and the headrest, and a lower end portion of the biasing member is coupled to a rear portion of the side frame and disposed posterior to the rear-end collision detector.