JP2019156357A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat in which deformation of a plate member of a seat back in an end part of a bead in a longitudinal direction is prevented.SOLUTION: A vehicle seat 10 includes a seat cushion 20 fixed to a body of a vehicle and a seat back 30. The seat back 30 includes a first member 50 formed in a tabular manner and a second member 60 which is formed into a hat sectional shape and one side face of which in a thickness direction of the first member 50 a flange part 61 contacts. In a central part of the first member 50, a central part bead 52 is provided. In the central part bead 52, the second member 60 and an end part of the central part bead 52 in a longitudinal direction overlap in a plan view in the thickness direction of the first member 50. Consequently, the deformation of the first member 50 of the seat back 30 in an end part of the central part bead 52 in the longitudinal direction can be prevented.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle seat.

  2. Description of the Related Art As a vehicle seat mounted on a vehicle such as an automobile, one having a seat back that can tilt with respect to a seat cushion is known. In such a vehicle seat, the seat back is supported so as to be rotatable and fixable at the lower end portion, and is releasably fixed to the vehicle body at the end portion in the width direction of the upper end portion (see, for example, Patent Document 1). ).

Japanese Patent No. 5966713

  In the vehicle seat described in Patent Document 1, since the upper end of the seat back is supported by a point, the strength member of the seat back is configured by a ribbed plate member in order to increase the rigidity of the seat back. Not only is it reinforced with pipe frames.

  By the way, in the structure which does not use a pipe frame unlike the vehicle seat described above, in order to reinforce the plate member of the seat back, there are cases where a large number of beads projecting from the front and back surfaces of the plate member are provided. In the case of such a structure, the rigidity of the end portion in the longitudinal direction of the bead is insufficient, which may be a starting point for deformation of the plate member.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a vehicle seat that can prevent a plate member of a seat back from being deformed at a longitudinal end portion of a bead.

  A vehicle seat according to an aspect of the present invention includes a seat cushion and a seat back that are fixed to a vehicle body. In a plan view along the thickness direction of the first member, the second member having a hat cross-sectional shape with which the flange portion comes into contact with, and a center bead provided in the center of the first member, The 2nd member and the longitudinal direction edge part of the said center part bead overlap.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle seat which can prevent that the board | plate member of a seat back deform | transforms in the longitudinal direction edge part of a bead can be provided.

It is a perspective view which shows the rear seat as a vehicle seat of this invention. It is the front view which looked at the back frame of the seat back from the front. (A) is sectional drawing which shows the state which attached the 2nd member to the plane part of the 1st member, (B) is sectional drawing in the position where the center part bead extended to the inside of the 2nd member. It is a front view of the back frame which saw through the 2nd member. It is a disassembled perspective view of a back frame. It is sectional drawing which shows the 2nd member which accommodates the accommodation bead provided in the 1st member, and an accommodation bead. It is a disassembled perspective view of a right back frame. It is a front view of the left back frame in the vehicle seat of the second embodiment of the present invention. It is a front view of the back frame which shows the state which interposed the board member between the 1st member and 2nd member corresponding to an axial part in the vehicle seat of 3rd Embodiment of this invention.

(First embodiment)
FIG. 1 shows an entire vehicle seat 10 for explaining an embodiment of the present invention.
In the following description, the front side of the vehicle is “front”, the rear side of the vehicle is “rear”, the right side is “right”, the left side is “left”, the upper side is “up”, and the lower side. Is denoted as “below”.

  In FIG. 1, for example, a rear seat (second row) of a passenger car is shown as a vehicle seat 10. The vehicle seat 10 includes a seat cushion 20 that is mounted on a body 100 such as an automobile and on which an occupant can mainly sit, and a seat back 30 that supports the back of the seated occupant.

The seat cushion 20 is a bench seat integrated in the vehicle width direction (left-right direction), and has a cushion frame (not shown) and a cushion material (not shown) provided on the cushion frame, and the surface thereof is made of fiber or leather. It is covered with a cushion skin 21 such as. The seat cushion 20 is attached to the floor F of the body 100.
The seat cushion 20 may be separable into left and right.

  As shown in FIG. 2, the seat back 30 is a split type that can be divided into left and right, and includes a right seat back 30R and a left seat back 30L. The ratio of the lengths in the left-right direction of the right seat back 30R and the left seat back 30L will be described here for the case of 4: 6, but is not limited to this. For example, the ratio is 6: 4 or 5: 5. May be.

The seat back 30 has a plate-like back frame 40 and a cushion material (not shown) attached to the front side of the back frame 40, and the surface is covered with a back skin 31 such as fiber or leather (see FIG. 1).
In the following description, common portions are denoted by the same reference numerals, but particularly when the right seat back 30R and the left seat back 30L are distinguished, they are distinguished by adding “R” and “L”, respectively. I decided to. Further, the upper side is displayed as “up” and the lower side is displayed as “lower” in a state where the seat back 30 is erected.

On the right and left ends of the right back frame 40R constituting the right seat back 30R and the left back frame 40L constituting the left seat back 30L, there are a shaft portion (second connection portion, hinge portion) 41 and a shaft portion (third connection portion, (Hinge part) 42 is provided, and is rotatably supported by a bearing part 101 provided in the body 100.
The bearing portion 101 may be provided with a reclining device capable of fixing the seat back 30 at a desired angle with respect to the seat cushion 20.

  A seat back fixing portion (first connecting portion) 43 for fixing the back frames 40R, 40L to the body 100 is provided at the outer end in the width direction of the body 100 at the upper ends of the right back frame 40R and the left back frame 40L. Are provided. A headrest 32 is detachably attached to the upper side of each seat back 30R, 30L (see FIG. 1), and a headrest attaching portion 44 for attaching the headrest 32 is provided above each back frame 40R, 40L. Is provided.

As shown in FIG. 2, the back frame 40 includes a plate-shaped first member 50 made of a metal plate having a thickness of, for example, 0.7 mm or less, and one surface in the thickness direction of the first member 50 (here, the front surface (planar portion) 51). ) And a second member 60 made of a metal plate having a thickness of 0.7 mm or less, for example.
Since the right back frame 40R and the left back frame 40L have the same structure, the left back frame 40L having a large area will be described in the following description unless particularly necessary.

The second member 60 is attached in a closed frame shape along the outer peripheral edge of the first member 50. Thereby, the whole 1st member 50 can be reinforced reliably.
In addition, it is possible to provide not only a frame shape but also a C-shape or a shape in which a pair of C-shapes face each other.

  As shown in FIGS. 3A and 3B, the second member 60 includes a flange portion 61 provided on both sides, a pair of vertical wall portions 62 rising from the inner edge of the flange portion 61, and a pair of It has a flat top plate (planar portion) 63 connecting the upper ends (front ends) of the vertical wall portions 62, and has a hat cross-sectional shape having a hollow portion 64 inside. The second member 60 is attached by welding so that the lower surface of the flange portion 61 contacts the front surface 51 of the first member 50.

  As shown in FIG. 2, when the left seat back 30L is used, the left back frame 40L is divided into three by a pair of left and right shaft portions 41 and 42 at the lower end portion and one seat back fixing portion 43 at the outer end in the width direction. Point supported.

  Therefore, an external force acts on the first member 50 in a direction in which the first member 50 bends at an imaginary line (line) L1 that connects the seat back fixing portion 43 and the seat back fixing portion 43 and the shaft portion 42 on a diagonal line. In order to resist this external force, a plurality of center-part beads 52 are provided in parallel in the center part of the first member 50 that is the inside of the second member 60, and the center-part beads 52 are connected to the virtual line L1. Are provided in parallel to a direction substantially perpendicular to the direction. As a result, even when the left back frame 40L is connected at three points, the strength can be reliably ensured.

  The center bead 52 can be simultaneously formed by press working when the first member 50 is manufactured. The center bead 52 may have a partial arc shape or a trapezoidal cross section, for example, and is formed so as to protrude to the second member 60 side, that is, forward. Thereby, since the center part bead 52 does not protrude on the rear surface (the side opposite to the front surface 51) of the first member 50, a flat cargo room surface can be secured in a state where the seat back 30 is tilted and stacked on the seat cushion 20. .

And the center part bead 52 has the duplication part 521 which overlapped with the 2nd member 60 in the longitudinal direction edge part in planar view along the thickness direction of the 1st member 50. As shown in FIG. That is, as shown in FIG. 3B, the second member 60 is provided with a tunnel portion 65 in a part of the flange portion 61 and the vertical wall portion 62 corresponding to the center bead 52, and the center portion The bead 52 passes through the tunnel portion 65 to form an overlapping portion 521. Thereby, it can prevent that the 1st member 50 of 40 L of left back frames deform | transforms in the longitudinal direction edge part of the center part bead 52. FIG.
In the tunnel portion 65, the overlapping portion 521 of the central bead 52 and the second member 60 are not joined by welding, so that stress is released.

  Although the overlap part 521 may be provided at both ends of the center bead 52, as shown in FIG. 2, it can be provided only at one end part. Moreover, although the overlap part 521 can also be provided in all the center part beads 52, it is provided in the one part center bead 52 here.

3B, the overlapping portion 521 reaches the hollow portion 64 of the second member 60. However, the overlapping portion 521 may reach the flange portion 61 without reaching the hollow portion 64.
In FIG. 2, the overlap portion 521 is not provided in the central bead 52 of the first member 50 of the right back frame 40R, but the overlap portion 521 can be provided similarly to the left back frame 40L.

  As shown in FIGS. 2 and 4, a semicircular tongue-like shape in which a flange portion 61 of the second member 60 extends downward along the front surface 51 of the first member 50 is formed on the front surface 51 of the first member 50. A flange extension 611 is provided. The flange extension portion 611 is provided with a retractor fixing portion (fixing portion) 71 for attaching a retractor that winds up the seat belt or locks it in an emergency. A belt guide portion 72 for guiding the seat belt is provided on the top plate 63 of the second member 60 corresponding to the upper side of the retractor fixing portion 71.

  A surrounding bead 54 is provided in a semicircular shape along the flange extension 611 on the first member 50 outside the semicircular flange extension 611 of the second member 60. Thereby, since the 1st member 50 corresponding to the retractor fixing | fixed part 71 is reinforced, it can prevent that a number of parts increases and an assembly man-hour increases, and can increase the intensity | strength of the retractor fixing | fixed part 71. Moreover, since the retractor fixing | fixed part 71 is attached to the 1st member 50 via the flange extension part 611 of a 2nd member, the intensity | strength of the retractor fixing | fixed part 71 increases further.

  As shown in FIGS. 4 and 5, a plurality of receiving beads 55 are provided in the first member 50 so as to be received in the hollow portion 64 of the second member 60 at a position covered by the second member 60. (See FIG. 6). A space S having a predetermined size is provided between the adjacent accommodation beads 55.

Thereby, the deformation | transformation of the accommodation bead 55 can be suppressed compared with the case where the accommodation bead 55 is continuing.
In addition, as shown in FIG. 5, in the center part bead 52a, the overlap part 521 is continuing to the accommodation bead 55a. A space S is provided between 55 and 55 and is separated.

As shown in FIG. 6, the receiving bead 55 is formed so as to protrude toward the second member 60, and has a flange portion 551, a vertical wall portion 552, and a flat surface portion 553. The flat portion 553 is provided with a through hole 554. A trim clip 74 for attaching the back skin 31 is attached to the through hole 554. At this time, the protruding dimension H of the receiving bead 55 is set to be larger than the thickness of the head 741 so that the head 741 of the trim clip 74 does not protrude toward the first member 50.
Note that it is not necessary to provide the through-hole 554 in the accommodation bead 55 located at a location that is not necessary for attaching the back skin 31 (for example, the upper edge end portion of the first member 50).

  As shown in FIGS. 4 and 5, a plate member 80 is provided at a predetermined position at the lower end portion of the first member 50 so as to be in contact with or between the first member 50 and the second member 60. . The thickness of the plate member 80 is larger than the plate thickness (for example, 0.7 mm or less) of the 1st member 50 and the 2nd member 60, for example, can be about 1.2-5 mm. Thereby, the predetermined part of the 1st member 50 can be reinforced easily and reliably.

  As shown in FIGS. 4 and 5, the right shaft portion 42 (see FIG. 2) to which the largest load is applied in the first member 50 has a flat plate-like first portion between the first member 50 and the second member 60. One plate member 81 is interposed. The first plate member 81 has an exposed portion 812 exposed to the outside from the flange portion 61 of the second member 60, and on the opposite side of the first member 50 corresponding to the exposed portion 812 from the second member 60, A shaft portion 42 is provided. Thereby, the shaft part 42 can be firmly attached to the first member 50.

  The first plate member 81 has an L shape in plan view, and has an inner space on the lower surface side at the center in the width direction in order to avoid interference with the storage bead 55 provided in the first member 50. A plate member bead 811 is provided so as to protrude to the second member 60 side. Thereby, while avoiding interference with the accommodation bead 55, the rigidity of the first plate member 81 can be increased.

  The first member 50, the second member 60, and the first plate member 81 can be welded at a time by laser welding or spot welding in a state where three sheets are stacked. Thereby, while reducing a man-hour and improving work efficiency, the 1st member 50, the 2nd member 60, and the 1st board member 81 can be joined reliably.

At this time, welding is performed from the first member 50 side, and the welding condition is adjusted so as not to penetrate the flange portion 61 of the second member 60 when joining the second member 60 through the first plate member 81. To do.
Although welding can be performed from the second member 60 side, in this case, the first member 50 is prevented from penetrating. As welding, for example, welding using a laser can be performed. Further, it is desirable that welding is not performed continuously along the flange portion 61 of the second member 60 in the longitudinal direction, but a non-welded portion is provided so as not to exceed a predetermined length.

  As shown in FIGS. 2 and 5, the flat plate bead 66 is provided on the top plate 63 of the second member 60 at the position where the first plate member 81 is provided. The flat surface bead 66 is provided on both sides of the first flat surface bead 661 and the first flat surface bead 661 provided at positions corresponding to the corners of the second member 60 and the first plate member 81. And a second flat surface bead 662.

  The first flat surface bead 661 is a convex bead protruding toward the front surface side of the top plate 63, and is provided in a direction toward the corner of the second member 60. On the other hand, the second flat surface bead 662 is a concave bead protruding toward the inner surface side of the top plate 63, and is provided in a direction along the frame-shaped second member 60. Thus, the reason why the bead direction of the flat surface bead 66 is concave and convex is that when a force acts in the direction of folding along the imaginary line L1, the bead with the constant concave and convex direction may not be able to suppress folding. In this way, the concave and convex portions are formed so that the bead direction of the flat surface bead 66 is not constant. Thereby, folding can be reliably prevented.

  4 and 5, the front surface 51 of the first member 50, the surface of the flange portion 61 of the second member 60, and the surface of the vertical wall portion 62 corresponding to the left shaft portion 41 (see FIG. 2). A crank-shaped second plate member 82 is provided along the surface of the top plate 63. On the surface of the second plate member 82, a plate member bead 821 that protrudes in a direction away from the first member 50 is provided. Thereby, the rigidity of the whole FRM can be improved and the 1st member 50 can be reinforced reliably.

  The second plate member 82 has an exposed portion 822 exposed to the outside from the flange portion 61 of the second member 60, and on the opposite side of the first member 50 corresponding to the exposed portion 822 from the second member 60, A shaft portion 41 is provided (see FIG. 2). Thereby, the shaft portion 41 can be firmly attached to the first member 50.

  FIG. 7 shows an exploded perspective view of the right back frame 40R. Since the right back frame 40R has a smaller left-right dimension than the left back frame 40L, a large force is not applied unlike the shaft portion 42 in the left back frame 40L. For this reason, in the right back frame 40R, the same structure as that of the shaft portion 41 in the left back frame 40L is used at both the left and right ends of the lower end portion.

Therefore, in FIG. 7, the same reference numerals are given to the same structures as those of the left back frame 40L shown in FIG.
In addition, the center part bead 52 provided in the 1st member 50 of the right back frame 40R is provided in the direction which cross | intersects or orthogonally crosses the virtual line L2 (refer FIG. 2).

(Second Embodiment)
FIG. 8 is a front view of the left back frame 40L in the vehicle seat 11 according to the second embodiment of the present invention.
In the following description, parts common to the vehicle seat 10 of the first embodiment described above are denoted by the same reference numerals, and redundant description is omitted.

  As shown in FIG. 8, in the left back frame 40L of the vehicle seat 11 of the second embodiment, a second member extension portion 67 is formed by extending the left-right direction central portion of the upper end portion of the second member 60 downward in a U shape. Is provided. The second member extension portion 67 has an extension surface 671 that is flush with the flange portion 61 on the inner side (center portion), and the retractor fixing portion 71 is attached to the extension surface 671. In addition, an extended vertical wall portion 672 similar to the vertical wall portion 62 of the second member 60 is provided outside the extended surface 671, and an extended ceiling in which the top plate 63 is extended to the upper end of the extended vertical wall portion 672. A plate 673 is provided in a U shape.

  That is, the retractor fixing portion 71 is surrounded by the extended vertical wall portion 672 and the extended top plate 673 of the second member 60 in place of the surrounding bead 54 of the first member 50 described above. Thereby, while being able to protect the retractor fixing | fixed part 71 reliably, it can provide simultaneously with the shaping | molding of the 2nd member 60, Therefore A number of parts can be reduced.

(Third embodiment)
FIG. 9 is a front view of the main part of the left back frame 40L in the vehicle seat 12 of the third embodiment of the present invention.
In addition, in the following description, the same code | symbol is attached | subjected to the site | part which is common in the vehicle seat 10 of 1st Embodiment mentioned above, and the vehicle seat 11 of 2nd Embodiment, and the overlapping description is abbreviate | omitted. To do.

  As shown in FIG. 9, in the left back frame 40L of the left seat back 30L of the vehicle seat 12 of the third embodiment, in the vehicle seat 10 of the first embodiment and the vehicle seat 11 of the second embodiment described above. Instead of the second plate member 82 provided corresponding to the shaft portion 41 (see FIG. 2), a third plate member 83 is provided as the plate member 80. Unlike the second plate member 82, the third plate member 83 has a flat plate shape, and the third plate member 83 is interposed between the first member 50 and the second member 60.

  A plate member bead 831 is provided on the surface of the third plate member 83 so as to protrude in the direction away from the first member 50 (ie, forward), and the plate member bead 831 protrudes toward the second member 60 side. The flange portion 61 and the vertical wall portion 62 of the second member 60 corresponding to the plate member bead 831 are provided with notches and recesses so as not to interfere.

Further, an exposed portion 832 exposed from the second member 60 is provided at a position corresponding to the corner portion of the first member 50 in the third plate member 83, and the first member 50 corresponding to the exposed portion 832 is provided. A shaft portion 41 is provided on the side opposite to the two members 60 (see FIG. 2).
In addition, the 3rd board member 83 is the same as the 1st board member 81 mentioned above, and is carrying out the laser welding or the spot welding at a time in the state which accumulated the 1st member 50, the 2nd member 60, and the 3rd board member 83. Can be welded.

  Even if comprised in this way, the effect similar to the vehicle seat 10 of 1st Embodiment mentioned above can be acquired.

As mentioned above, although the sheet | seat 10,11,12 of this invention has been demonstrated based on specific embodiment, this invention is not limited to the specific embodiment mentioned above, The technical thought of this invention Needless to say, various modifications and improvements may be made without departing from the scope of the invention.
For example, in the above-described embodiment, the passenger car has been described, but the present invention can be similarly applied to other vehicles.

  As described above, the vehicle seat disclosed in the present specification includes a seat cushion and a seat back fixed to a vehicle body, and the seat back includes a first member formed in a plate shape, A second member having a hat cross-sectional shape in which a flange portion is in contact with one surface in the thickness direction of the first member; and a central bead provided at a central portion of the first member; and in the thickness direction of the first member. In the planar view along, the 2nd member and the longitudinal direction edge part of the center part bead overlap.

  In the vehicle seat disclosed in the present specification, the first member is formed with the center bead so as to protrude toward the second member, and the second member is formed on the center bead. Correspondingly, a tunnel portion is provided in a part of the flange portion and the vertical wall portion of the second member.

  In the vehicle seat disclosed in the present specification, the flat surface portion of the first member and the flange portion of the second member are fixed to each other.

  In addition, the vehicle seat disclosed in the present specification includes a first connection portion for detachably connecting an upper portion of the first member on a side of the vehicle in the forward direction of the vehicle, and the vehicle in the body. A second connecting portion for pivotally connecting the lower portion of the first member on the side of the forward direction, and a lower portion of the first member adjacent to the second connecting portion for pivotal connection. And the center bead extends along a line intersecting or orthogonal to a line connecting the first connection part and the third connection part.

  In the vehicle seat disclosed in the present specification, the second member has a frame shape in plan view.

  As described above, the vehicle seat disclosed in the present specification includes a seat cushion and a seat back fixed to a vehicle body, and the seat back includes a first member formed in a plate shape, A second member having a hat cross-sectional shape in which a flange portion contacts one surface in the thickness direction of the first member, and a fixing portion that is supported by one of the first member and the second member and can fix the retractor. An enclosing bead surrounding the fixed portion is provided on one of the first member and the second member in a plan view along the stacking direction of the first member and the second member.

  In the vehicle seat disclosed in this specification, the surrounding bead is provided on the first member.

  In the vehicle seat disclosed in the present specification, the surrounding bead is continuous with the second member.

  In addition, the vehicle seat disclosed in the present specification can be attached to and detached from the center part bead provided at the center part of the first member and the first member on the side of the vehicle in the forward direction of the vehicle. A first connecting portion for connecting to the vehicle, a second connecting portion for pivotally connecting a lower portion of the first member on the side of the vehicle in the forward direction of the vehicle, and adjacent to the second connecting portion. And a third connecting part for pivotally connecting the lower part of the first member, and the center bead intersects a line connecting the first connecting part and the third connecting part Or along an orthogonal line.

  In the vehicle seat disclosed in this specification, the second member has a frame shape in plan view.

  As described above, the vehicle seat disclosed in the present specification includes a seat cushion and a seat back fixed to a vehicle body, and the seat back includes a first member formed in a plate shape, A second member having a hat cross-sectional shape in which the flange portion contacts one side in the thickness direction of the first member, and a plurality of receiving beads provided at positions covered by the second member in the first member, In the plan view along the stacking direction of the first member and the second member, the receiving beads are provided at a predetermined interval along the continuous direction of the second member.

  In the vehicle seat disclosed in the present specification, the storage bead is formed so as to protrude toward the second member, and a through hole is provided in a flat portion of the storage bead.

  In addition, the vehicle seat disclosed in the present specification can be attached to and detached from the center part bead provided at the center part of the first member and the first member on the side of the vehicle in the forward direction of the vehicle. A first connecting portion for connecting to the vehicle, a second connecting portion for pivotally connecting a lower portion of the first member on the side of the vehicle in the forward direction of the vehicle, and adjacent to the second connecting portion. And a third connecting part for pivotally connecting the lower part of the first member, and the center bead intersects a line connecting the first connecting part and the third connecting part Or along an orthogonal line.

  In the vehicle seat disclosed in this specification, the second member has a frame shape in plan view.

  As described above, the vehicle seat disclosed in the present specification includes a seat cushion and a seat back fixed to a vehicle body, and the seat back includes a first member formed in a plate shape, A vehicle seat comprising: a second member having a hat cross-sectional shape in which a flange portion contacts one surface in the thickness direction of the first member; and a plate member provided between the first member and the second member.

  In the vehicle seat disclosed in the present specification, the plate member is interposed between the flat surface portion of the first member and the flange portion of the second member.

  In the vehicle seat disclosed in the present specification, a flat surface bead is provided at a position corresponding to the plate member in the flat surface portion of the second member.

  In the vehicle seat disclosed in the present specification, the flat surface portion of the first member, the flange portion of the second member, and the plate member are integrally welded along the thickness direction of the plate member. ing.

  In the vehicle seat disclosed in the present specification, the plate member has an exposed portion exposed to the outside from the flange portion of the second member, and the first member corresponds to the exposed portion. In addition, a hinge portion is provided on the side opposite to the second member.

  Further, in the vehicle seat disclosed in the present specification, the plate member is formed along the surface of the flat surface portion of the first member and the flange portion of the second member, the surface of the vertical wall portion, and the surface of the flat surface portion. Has been placed.

  In the vehicle seat disclosed in the present specification, the plate member is provided with a plate member bead that protrudes in a direction away from the first member.

  In the vehicle seat disclosed in the present specification, the first member is provided with a hinge portion on the side opposite to the second member in the planar portion along which the plate member extends.

  In addition, the vehicle seat disclosed in the present specification can be attached to and detached from the center part bead provided at the center part of the first member and the first member on the side of the vehicle in the forward direction of the vehicle. A first connecting portion for connecting to the vehicle, a second connecting portion for pivotally connecting a lower portion of the first member on the side of the vehicle in the forward direction of the vehicle, and adjacent to the second connecting portion. And a third connecting part for pivotally connecting the lower part of the first member, and the center bead intersects a line connecting the first connecting part and the third connecting part Or along an orthogonal line.

  In the vehicle seat disclosed in this specification, the second member has a frame shape in plan view.

10, 11, 12 Vehicle seat 20 Seat cushion 30 Seat back 41 Shaft (second connecting portion)
42 Shaft (third connection)
43 Seat back fixing part (first connecting part)
50 1st member 51 Rear surface (plane part in 1st member)
52 Central part bead 60 2nd member 61 Flange part 62 Vertical wall part 65 Tunnel part 101 Body L1, L2 Virtual line (line to connect)

Claims (5)

A seat cushion and seat back fixed to the vehicle body,
The seat back is
A first member formed in a plate shape;
A hat-shaped second member in which a flange portion is in contact with one surface in the thickness direction of the first member;
A central bead provided in the central part of the first member,
The vehicle seat in which the second member and a longitudinal end portion of the central bead overlap in a plan view along the thickness direction of the first member. The vehicle seat according to claim 1,
The central part bead is formed so that the first member is raised toward the second member,
The second member is a vehicle seat in which a tunnel portion is provided in a part of a flange portion and a vertical wall portion of the second member corresponding to the center bead. The vehicle seat according to claim 2,
A vehicle seat in which a flat surface portion of the first member and a flange portion of the second member are fixed to each other. The vehicle seat according to any one of claims 1 to 3,
A first connection portion for removably connecting the upper portion of the first member on the side of the vehicle in the forward direction of the vehicle;
A second connecting portion for pivotally connecting a lower portion of the first member on the side of the vehicle in the forward direction of the vehicle;
A third connecting portion adjacent to the second connecting portion and rotatably connecting the lower portion of the first member;
The center bead is a vehicle seat along a line intersecting a line connecting the first connection part and the third connection part. The vehicle seat according to any one of claims 1 to 4, wherein
The second member is a vehicle seat having a frame shape in plan view.

Images