JP2012131465A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat that surely receives an impact load inputted from the vehicle side and efficiently transmits the impact load to a center tunnel via a seat frame.SOLUTION: The vehicle seat has a load transmission member 54 provided on a tilting shaft 15 of a seat back frame and extending in the seat width direction between side frames 18, on both sides in the seat width direction of the seat back frame. A prescribed clearance D is provided in the seat width direction between the side frame 18 and the load transmission member 54. A motor unit 45 for driving is arranged in the clearance D so as to tilt the seat back frame. A reinforcing plate 70 is mounted on the end surface in the seat width direction of the load transmission member 54 so as to be arranged oppositely to the motor unit 45 for driving.

Description

  The present invention relates to a vehicle seat.

  2. Description of the Related Art When a vehicle has a side collision (hereinafter referred to as “side collision”), a vehicle seat that transmits an impact load input from the side of the vehicle to the inner side in the width direction of the vehicle body via a seat frame is known (for example, , See Patent Document 1).

  The vehicle seat of Patent Document 1 includes reclining devices on the left and right sides of the seat back frame, and the left and right reclining devices are coupled to each other by a coupling shaft. A reinforcement pipe (corresponding to the “load transmission member” of the present application) is installed between the left and right ends of the lowermost portion of the seat back frame, and a connecting shaft (corresponding to the “tilting shaft” of the present application) is accommodated in the reinforcement pipe. When an impact load due to a side collision of the vehicle is input to the vehicle seat, the impact load is transmitted to the center tunnel on the inner side in the width direction of the vehicle body via the reinforcing pipe and the connecting shaft.

  Incidentally, the vehicle seat of Patent Document 1 includes a motor that tilts the seat back frame. This motor is a drive source for rotating the connecting shaft, and the seat back frame is tilted by rotating the connecting shaft. In Patent Document 1, the motor is disposed above the connection shaft and the reinforcing tube, but when the driving force is transmitted to the connection shaft via a drive transmission device such as a reduction gear, the seat back frame is tilted. Conceivable.

No. 5-18991

  Here, in order to transmit the driving force to the connecting shaft, it is usually necessary to arrange a drive transmission device on the side of the reinforcing pipe. At this time, in order to avoid interference between the reinforcing tube and the drive transmission device, it is necessary to dispose the reinforcing tube apart from the seat back frame and to provide a clearance between the side of the reinforcing tube and the seat back frame.

  However, if a clearance is provided on the side of the reinforcing pipe, a bracket constituting the seat frame such as a seat back frame or a seat cushion frame may fall into the clearance and bite into the end of the reinforcing pipe. As a result, a bending moment tends to act on the reinforcing tube, and the reinforcing tube may be bent and deformed. As a result, the impact load may not be efficiently transmitted to the center tunnel via the reinforcing pipe.

  Accordingly, an object of the present invention is to provide a vehicle seat that can reliably receive an impact load input from a side portion of the vehicle and efficiently transmit it to the center tunnel via the seat frame.

  In order to solve the above-described problems, a vehicle seat (for example, the vehicle seat 10 in the embodiment) of the present invention has a seat cushion frame (for example, the seat cushion frame 7 in the embodiment) and the seat cushion frame. A seat back frame supported in a tiltable manner (for example, the seat back frame 13 in the embodiment), provided on the tilt axis (for example, the tilt shaft 15 in the embodiment) of the seat back frame, and the seat A load transmission member (for example, a load transmission member 54 in the embodiment) extending in the seat width direction between side frames (for example, the side frames 18 and 19 in the embodiment) on both sides of the back frame in the seat width direction. In the vehicle seat, any of the left and right side frames A predetermined clearance (for example, clearance D in the embodiment) is provided in the seat width direction between the load transmission member and the load transmission member, and a drive motor (for example, the embodiment) tilts the seat back frame to the clearance. And a reinforcing plate (for example, the reinforcing plate 70 in the embodiment) arranged to face the driving motor is attached to the end face in the seat width direction of the load transmitting member. It is characterized by that.

According to the present invention, it is possible to improve the bending rigidity of the load transmission member by attaching the reinforcing plate to the end face of the load transmission member.
Further, even if the side frame falls into the clearance at the time of a side collision, the impact load can be received on the surface of the reinforcing plate, so that the side frame does not bite into the end face of the load transmitting member. Therefore, it is possible to suppress the bending moment from acting on the load transmission member and to prevent the load transmission member from being bent. Thus, the impact load input from the vehicle side can be reliably received and efficiently transmitted to the center tunnel via the load transmission member.

The left and right side frames include side wall portions (for example, side walls 18b and 19b in the embodiment) that extend along the vehicle front-rear direction and to which the drive motor is attached, and the reinforcing plate is substantially parallel to the side wall portions. It is characterized by being arranged.
According to the present invention, even if an impact load is input obliquely from the side of the vehicle at the time of a side collision, the impact load can be received on the surface of the side wall. Furthermore, since the reinforcing plate is disposed substantially parallel to the side wall portion, the side wall portion receiving the impact load can transmit the impact load in a state close to a plane with respect to the surface of the reinforcing plate. Thereby, since it can further suppress that a bending moment acts with respect to a load transmission member, it can transmit to a center tunnel via a load transmission member more efficiently.

The drive motor is connected to a motor unit (for example, the motor unit 47 in the embodiment), a reduction mechanism unit (for example, the reduction mechanism unit 48 in the example) connected to the motor unit, and the reduction mechanism unit. And a bearing portion (for example, a bearing portion 49 in the embodiment) that rotates the tilting shaft, and the reinforcing plate is disposed to face the speed reduction mechanism portion and the bearing portion. .
In general, the motor part of the drive motor is made of metal, whereas the speed reduction mechanism part and the bearing part of the drive motor are made of resin. For this reason, when the impact load input from the side of the vehicle is transmitted to the drive motor and moves and collides with the reinforcing plate, the reduction mechanism and the bearing are destroyed by the reinforcing plate. That is, according to the present invention, the reduction mechanism portion and the bearing portion are opposed to the reinforcing plate, so that the impact load is reliably received by the reinforcing plate and the drive motor is prevented from biting into the end face of the load transmitting member. Thereby, since it can suppress that a bending moment acts with respect to a load transmission member, it can transmit to a center tunnel via a load transmission member efficiently.

According to the present invention, it is possible to improve the bending rigidity of the load transmission member by attaching the reinforcing plate to the end face of the load transmission member.
Further, even if the side frame falls into the clearance at the time of a side collision, the impact load can be received on the surface of the reinforcing plate, so that the side frame does not bite into the end face of the load transmitting member. Therefore, it is possible to suppress the bending moment from acting on the load transmission member and to prevent the load transmission member from being bent. Thus, the impact load input from the vehicle side can be reliably received and efficiently transmitted to the center tunnel via the load transmission member.

It is explanatory drawing of the vehicle provided with the vehicle seat of this invention. 1 is a perspective view of a vehicle seat frame viewed from the front of the vehicle. 1 is a perspective view of a vehicle seat frame viewed from the rear of the vehicle. It is a disassembled perspective view of a vehicle seat frame. It is sectional drawing along the AA line of FIG. It is the figure which showed typically the mode of transmission of an impact load.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to the drawings. In the following description, in order to simplify the description, the front of the vehicle 1 is simply forward, the rear of the forward direction is simply rear, the width direction of the vehicle 1 is simply left and right, and the vertical direction of the vehicle 1 is simply upward and downward. And may be described as downward.
FIG. 1 is an explanatory view of a vehicle 1 provided with a vehicle seat 10 of the present invention, FIG. 2 is a perspective view of a vehicle seat frame 12 viewed from the front of the vehicle 1, and FIG. 3 is a vehicle seat viewed from the rear of the vehicle. 3 is a perspective view of a frame 12. FIG. In the drawings, the arrow F indicates the front of the vehicle 1.

  As shown in FIG. 1, a center console 3 extending along the front-rear direction of the vehicle 1 is formed in the interior of the vehicle 1 at approximately the center in the left-right direction of the vehicle 1. Center console 3 is formed in the passenger compartment so as to cover center tunnel 2 formed on floor 4 of vehicle 1. The center tunnel 2 is formed by projecting substantially the center in the left-right direction of the floor 4 along the front-rear direction of the vehicle 1.

  On the left side of the vehicle 1 with the center console 3 interposed therebetween, a vehicle seat 10 on the driver's seat side is disposed so as to be slidable in the front-rear direction via the seat rail 8. In addition, on the right side of the vehicle 1 across the center console 3, a vehicle seat 9 on the passenger seat side is disposed so as to be slidable in the front-rear direction via the seat rail 8. The vehicle seat 9 on the passenger seat side has the same structure as the vehicle seat 10 on the driver seat side. Therefore, hereinafter, the vehicle seat 10 on the driver's seat side will be described, and the description of the vehicle seat 9 on the passenger seat side will be omitted.

  The vehicle seat 10 is mainly composed of a seat cushion 20 that supports the occupant's buttocks and a seat back 30 that supports the occupant's waist and back. The vehicle seat frame 12 that constitutes the skeleton of the vehicle seat 10 includes a seat cushion frame 7 that is a skeleton of the seat cushion 20 and a seat back frame 13 that is a skeleton of the seat back 30. A recliner mechanism 50 is provided between the rear end portion of the seat cushion frame 7 and the lower end portion of the seat back frame 13 to support the seat back frame 13 so as to be tiltable.

(Seat cushion frame)
As shown in FIGS. 2 and 3, the seat cushion frame 7 is formed in a rectangular frame shape by front and rear cross members 5A and 5B and side plates 6A and 6B.
The cross members 5A and 5B are made of a pipe material and extend along the sheet width direction. The ends of the cross members 5A and 5B are fixed to the side plates 6A and 6B by welding or the like, respectively.

The side plates 6 </ b> A and 6 </ b> B that constitute the seat cushion frame 7 are plate members that extend in the front-rear direction of the vehicle 1. As shown in FIG. 4, an opening 61 is formed at the rear ends of the side plates 6A and 6B.
The opening 61 is formed in a substantially circular shape when viewed from the sheet width direction. In addition, a tongue piece 63 that extends toward the inner diameter side of the opening 61 is formed on the inner peripheral edge 61 a of the opening 61. The tongue pieces 63 are formed at four locations along the circumferential direction of the opening 61, for example, at a pitch of 90 °. The number of tongue pieces 63, the length in the radial direction, the width along the circumferential direction of the tongue piece 63, and the like are design items that are appropriately set.

(Recliner mechanism)
At the rear end portion of the seat cushion frame 7, there is a recliner mechanism 50 that supports a seat back frame 13 described later so as to be tiltable.
As shown in FIGS. 2 to 4, the recliner mechanism 50 includes a tilt shaft 15 that rotatably connects the seat cushion frame 7 and the seat back frame 13, and a drive motor unit 45 that rotates the tilt shaft 15 ( Drive motor) and recliner plates 56 arranged at both ends of the tilting shaft 15.

  The tilt shaft 15 is a rod-shaped member made of a metal such as iron or stainless steel, and extends in the seat width direction of the vehicle seat 10. Spline teeth 15 a are formed on the peripheral surface of the tilt shaft 15 and are spline-coupled to the drive motor unit 45.

The drive motor unit 45 includes a motor unit 47 that incorporates a motor (not shown) that is driven to rotate, and a speed reduction mechanism unit 48 that decelerates the rotation speed of the motor. The motor unit 47 is disposed above the drive motor unit 45 and includes, for example, a DC motor.
The reduction mechanism 48 includes a worm gear, a worm wheel, an output gear (all not shown), and the like. The worm wheel is connected to the tilting shaft 15 via an output gear, and is rotatably supported in the speed reduction mechanism portion 48 by a bearing portion 49.
Moreover, the speed reduction mechanism part 48 has an output part 46 that penetrates in the sheet width direction. The tilt shaft 15 is inserted into the output portion 46 of the speed reduction mechanism 48 and is spline-coupled with the output gear of the speed reduction mechanism 48. The speed reduction mechanism 48 and the bearing 49 are made of resin and can be compressed and deformed when an impact load is applied.

Recliner plates 56 are disposed at both ends of the tilt shaft 15. The recliner plate 56 is a substantially disk-shaped member, and is formed by pressing a flat plate member.
A through hole 56 a through which the tilt shaft 15 is inserted is formed in the approximate center of the recliner plate 56. Spline teeth are formed on the inner peripheral surface of the through hole 56a, and the recliner plate 56 is splined to the tilt shaft 15 by inserting the tilt shaft 15 into the through hole 56a. Thereby, the recliner plate 56 is positioned in the circumferential direction with respect to the tilting shaft 15.

The recliner plate 56 is formed with positioning protrusions 57 that protrude in the sheet width direction.
The positioning protrusions 57 are formed at four positions at a pitch of 90 ° at positions corresponding to between the tongue pieces 63 along the circumferential direction. The diameter of the outer peripheral edge 57 a of the positioning protrusion 57 is set to be substantially the same as or slightly smaller than the diameter of the inner peripheral edge 61 a in the opening 61 of the seat cushion frame 7. The width along the circumferential direction of the positioning projection 57 is set to be substantially the same as or slightly narrower than the separation distance in the circumferential direction of each tongue piece 63 of the opening 61. By setting the dimensions of the positioning protrusions 57 of the recliner plate 56 as described above, the recliner plate 56 fits between the base portions of the adjacent tongue piece parts 63 so that the circumferential end portions of the positioning protrusions 57 are adjacent to each other. It is positioned in the circumferential direction in a state where it abuts against the edge of the piece 63.

Thus, the recliner plate 56 is positioned by spline coupling with respect to the tilting shaft 15, and the recliner plate 56 is positioned with respect to the seat cushion frame 7 by the positioning projection 57. That is, the recliner mechanism 50 is positioned with respect to the seat cushion frame 7.
A substantially disc-shaped washer 58 is inserted through the tilting shaft 15 on the outside of the recliner plate 56. The washer 58 is fitted and fixed to the tilting shaft 15 by press fitting or the like, and restricts the tilting shaft 15 from moving along the axial direction.

(Seat back frame)
As shown in FIGS. 2 and 3, the seat back frame 13 includes a top frame portion 13 a, a left frame portion 13 b, a right frame portion 13 c, and a load transmission member 54 disposed below, so that the front view is omitted. It is formed in a rectangular shape.

Each frame part 13a, 13b, 13c is formed by bending an integral skeleton pipe into a substantially U shape. The upper frame portion 13a is formed along the seat width direction, and the left frame portion 13b and the right frame portion 13c are formed along the vertical direction.
The upper frame portion 13a supports the headrest 40 (see FIG. 1). The headrest 40 is supported on the upper part of the seat back 30 so as to be close and separate.
Further, between the left frame portion 13b and the right frame portion 13c, a support mat 16 is stretched with an elastic force applied by a wire, and a support wire 17 is provided with an elastic force above the support mat 16. It is stretched. The support mat 16 and the support wire 17 support a pad (not shown) of the seat back 30.

  Side plates 14a and 14b having flanges on the front side portion and the rear side portion are fixed to the outside of the left frame portion 13b and the right frame portion 13c by welding or the like. The lower ends of the side plates 14a and 14b extend below the lower ends 13d and 13e of the left frame portion 13b and the right frame portion 13c.

Further, side frames 18 and 19 (left side frame 18 and right side frame 19) are fixed to the lower ends of the side plates 14a and 14b, respectively, by welding or the like. Each side frame 18, 19 is substantially in a plan view L by side walls 18 b, 19 b along the side surfaces of the side plates 14 a, 14 b, and rear walls 18 a, 19 a from the rear ends of these side walls 18 b, 19 b toward the vehicle interior side. It is a member formed in a letter shape. Therefore, the left side frame 18 and the right side frame 19 are formed in a symmetrical shape.
The side wall 18b of the left side frame 18 extends forward, and the drive motor unit 45 is fastened and fixed to the inside of the side wall 18b in the seat width direction by bolts or the like.

The load transmission member 54 disposed below the seat back frame 13 is a long member formed in an open cross-sectional shape by bending a flat plate member, and extends in the seat width direction.
As shown in FIG. 5, the load transmission member 54 includes a rear wall portion 55a disposed at the rear, an upper wall portion 55b disposed at the upper side, and a front wall portion 55c disposed at the front, Is open along the sheet width direction.

  The rear wall portion 55a of the load transmission member 54 is disposed vertically along the seat width direction, and is fixed to the lower portions of the rear walls 18a, 19a of the side frames 18, 19 by, for example, welding. That is, the load transmission member 54 is fixed so as to straddle the left frame portion 13b and the right frame portion 13c via the side plates 14a and 14b and the side frames 18 and 19 (see FIGS. 2 and 3). .

The upper wall portion 55b of the load transmission member 54 extends along the seat width direction and is disposed horizontally. The length of the upper wall portion 55b in the front-rear direction of the vehicle is set to be substantially the same as the distance between the tilt shaft 15 and the rear wall portion 55a.
An upper portion 55d of the front wall portion 55c of the load transmitting member 54 is formed so as to gradually move away from the rear wall portion 55a from the upper side to the lower side. Further, the lower portion 55e of the front wall portion 55c is formed so as to bend rearward along the outer peripheral surface of the tilting shaft 15 and close to the rear wall portion 55a, and then to be bent forward and separated from the rear wall portion 55a. Has been. That is, the lower portion 55e of the front wall portion 55c is formed to have a substantially S-shape in cross section, and the cross section coefficient of the load transmission member 54 is increased to improve the strength in the seat width direction.

The right end 54b of the load transmission member 54 is abutted against the side wall 19b of the right side frame 19 and is fixed by welding.
On the other hand, the left end 54 a of the load transmission member 54 is disposed away from the side wall 18 b of the left side frame 18. A clearance D (see FIG. 6) formed by the side wall 18b of the left side frame 18 and the left end portion 54a of the load transmission member 54 has a drive motor unit 45 attached to the side wall 18b of the left side frame 18. Is placed. A reinforcing plate 70 is attached to the left end 54 a of the load transmission member 54.

The reinforcing plate 70 is a flat plate member made of metal such as iron. As shown in FIG. 5, the reinforcing plate 70 covers the entire rear wall portion 55a of the load transmission member 54, the upper wall portion 55b, and the lower end of the lower portion 55e of the front wall portion 55c when viewed from the seat width direction. Is formed. The reinforcing plate 70 is disposed substantially parallel to the side wall 18b of the left side frame 18, and is disposed so as to face the side wall 18b and the driving motor unit 45 attached to the side wall 18b.
The upper end of the reinforcing plate 70 protrudes upward from the upper wall portion 55b of the load transmission member 54, and serves as a welding margin with the upper wall portion 55b of the load transmission member 54. Further, by projecting the upper end of the reinforcing plate 70 upward, a large area of the reinforcing plate 70 is secured, and the reinforcing plate 70 is surely opposed to the speed reduction mechanism portion 48 and the bearing portion 49 of the drive motor unit 45. ing.

The front edge portion 70a of the reinforcing plate 70 extends downward from above the upper wall portion 55b of the load transmitting member 54, curves backward to avoid the tilting shaft 15 at a position corresponding to the tilting shaft 15, and then forwards. It is curved and covers the lower end of the lower portion 55e of the front wall portion 55c.
The rear edge portion 70 b of the reinforcing plate 70 extends downward from above the upper wall portion 55 b of the load transmission member 54, and then the lower end of the rear wall portion 55 a of the load transmission member 54 and the front wall portion of the load transmission member 54. It is formed so as to connect the lower end of the lower portion 55e of 55c. Since the reinforcing plate 70 connects the lower end of the rear wall portion 55a of the load transmission member 54 and the lower end of the lower portion 55e of the front wall portion 55c of the load transmission member 54, the bending rigidity of the load transmission member 54 is improved.

(Operation of this embodiment)
Next, the operation of this embodiment will be described.
FIG. 6 is a diagram schematically showing the transmission of the impact load P at the time of a side collision when viewed from the front.
When the impact load P is input from the side portion of the vehicle and the side wall 90 such as the center pillar is deformed to the vehicle interior side, the impact load P from the side wall 90 is input to the left side frame 18.

For example, as shown in FIG. 6, when the impact load P is input slightly obliquely downward, there is a clearance D between the left side frame 18 and the load transmission member 54, so the left side frame 18 is connected to the drive motor unit 45. At the same time, the vehicle falls toward the inside of the vehicle (left side in FIG. 6).
Here, since the reinforcing plate 70 is attached to the left end 54 a of the load transmitting member 54, the left side frame 18 and the driving motor unit 45 that have fallen collide with the surface of the reinforcing plate 70. The impact load P is evenly distributed over the entire surface of the reinforcement plate 70 by the reinforcement plate 70, and then the transmission direction is changed along the central axis O. The reinforcing plate 70 is disposed substantially parallel to the side wall 18b of the side frame 18. Therefore, even if the side wall 18 b of the side frame 18 falls into the clearance D, it collides with the surface of the reinforcing plate 70 in a state close to a plane. Further, the speed reduction mechanism portion 48 and the bearing portion 49 of the drive motor unit 45 made of resin are sandwiched between the side wall 18 b and the reinforcing plate 70 and are destroyed, and the impact load P is transmitted to the reinforcing plate 70.

  Thereafter, the impact load P is transmitted to the load transmission member 54 along the central axis O, and is transmitted to the seat cushion frame 7 through the load transmission member 54. Then, when the entire vehicle seat 10 moves inward and comes into contact with the center console 3 (see FIG. 1), the impact load P is transmitted to the center tunnel 2 via the center console 3 and absorbed.

(effect)
According to this embodiment, the bending rigidity of the load transmission member 54 can be improved by attaching the reinforcing plate 70 to the end face of the load transmission member 54.
Even if the side frame 18 falls into the clearance D at the time of a side collision, the impact load P can be received by the surface of the reinforcing plate 70, so that the side frame 18 does not bite into the end face of the load transmission member 54. Therefore, it is possible to suppress the bending moment from acting on the load transmitting member 54 and to prevent the load transmitting member 54 from being bent. In this way, the impact load P input from the side of the vehicle can be reliably received and efficiently transmitted to the center tunnel 2 via the load transmission member 54.

  Further, according to the present embodiment, since the reinforcing plate 70 is disposed substantially in parallel with the side wall 18b of the side frame 18, even if the impact load P is inputted obliquely from the vehicle side part at the time of a side collision, The surface can receive an impact load P. Further, since the reinforcing plate 70 is disposed substantially parallel to the side wall 18 b, the side wall 18 b that has received the impact load P can transmit the impact load P in a state that is close to the surface of the reinforcing plate 70. it can. Thereby, since it is possible to further suppress the bending moment from acting on the load transmission member 54, the load transmission member 54 can be more efficiently transmitted to the center tunnel 2 via the load transmission member 54.

  Further, according to the present embodiment, the reduction mechanism portion 48 and the bearing portion 49 formed of resin are opposed to the reinforcing plate 70, so that the impact load P is reliably received by the reinforcing plate 70, and the end face of the load transmitting member 54 This prevents the drive motor unit 45 from biting in. As a result, it is possible to suppress the bending moment from acting on the load transmission member 54, so that it can be efficiently transmitted to the center tunnel 2 via the load transmission member 54.

In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.
The shapes of the seat cushion frame 7, the seat back frame 13, the reinforcing plate 70, and the like of the embodiment are not limited to the shapes of the embodiment, and can be changed to various shapes.
In the present embodiment, the load transmission member 54 is formed by bending a flat plate member into a cylindrical shape. However, for example, the load transmission member 54 may be formed by cutting the seamless tube.

  In this embodiment, a clearance D is provided between the left side frame 18 and the left end portion 54 a of the load transmission member 54, the drive motor unit 45 is disposed, and a reinforcing plate is provided on the left end portion 54 a of the load transmission member 54. Is attached. However, for example, a clearance D is provided between the right side frame 19 and the right end 54 b of the load transmission member 54, and the drive motor unit 45 is disposed, and the reinforcing plate 70 is disposed on the right end 54 b of the load transmission member 54. May be attached.

DESCRIPTION OF SYMBOLS 1 ... Vehicle 10 ... Vehicle seat 7 ... Seat cushion frame 10 ... Vehicle seat 12 ... Vehicle seat frame 13 ... Seat back frame 15 ... Tilt shaft 18, 19 ... Side frames 18b, 19b ... Side walls (side walls) 45 ... Drive motor unit (drive motor) 47 ... Motor part 48 ... Deceleration mechanism part 49 ... Bearing part 54 ...・ Load transmission member 70 ・ ・ ・ Reinforcement plate D ・ ・ ・ Clearance

Claims (3)

A seat cushion frame, and a seat back frame supported to be tiltable with respect to the seat cushion frame,
A vehicle seat comprising: a load transmission member provided on a tilt axis of the seat back frame and extending in the seat width direction between side frames on both sides of the seat back frame in the seat width direction;
A predetermined motor is provided in the seat width direction between any one of the left and right side frames and the load transmission member, and a drive motor for tilting the seat back frame is disposed in the clearance.
A vehicle seat, wherein a reinforcing plate disposed to face the drive motor is attached to an end surface of the load transmission member in the seat width direction.   The left and right side frames each include a side wall portion that extends along a vehicle front-rear direction and to which the drive motor is attached, and the reinforcing plate is disposed substantially parallel to the side wall portion. Vehicle seats.   The drive motor includes a motor unit, a speed reduction mechanism unit coupled to the motor unit, and a bearing unit coupled to the speed reduction mechanism unit to rotate the tilting shaft, and the reinforcing plate includes the speed reduction mechanism. The vehicle seat according to claim 1, wherein the vehicle seat is disposed so as to face the portion and the bearing portion.

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