JP2015047387A - Seat back - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat back capable of improving appearance quality and work ability.SOLUTION: The seat back comprises: a seat back frame; a seat back pad 4; a skin material 5; and an armrest 2. The armrest 2 is configured to be switched between a standing storage state in which the armrest 2 is stored in a storage recess part 3 of the seat back pad 4, and a use state in which the armrest 2 projects toward a seat front side Fr from the storage recess part 3. An inner surface of the storage recess part 3 is covered by the skin material 5, and a resin board 7 is overlapped and fixed to a rear surface 6U of a first skin material part 6 covering a depth surface 3M of the storage recess part 3. In the storage recess part 3, the resin board 7 exists between the first skin material part 6 and the seat back pad 4.

Description

The present invention
A seat back frame;
A seat back pad supported by the seat back frame;
A skin material covering the seat back frame and the seat back pad;
With armrests,
The armrest is supported by the seatback frame so as to be swingable about a horizontal axis on the base end side, and is stowed and stored in the storage recess of the seatback pad, and the seat front side from the storage recess It is configured to be switchable to the usage state protruding to
The inner surface of the storage recess relates to a vehicle seat back covered with the skin material.

In the above seat back, among the skin materials covering the seat back pad, the lower end portion of the skin material portion covering the inner surface of the storage recess is sandwiched between the base end portion of the armrest and the seat back pad. Therefore, the lower end portion of the skin material portion is not easily displaced.
However, the upper part of the skin material portion merely covers the seat back pad and is not restrained by other parts. For this reason, misalignment and wrinkles are generated in the upper part of the skin material portion, and the appearance quality is likely to be deteriorated. Also, when assembling, it is difficult to fit the skin material portion to the seat back pad surface of the storage recess without wrinkles, and workability is poor.
In order to solve these problems, conventionally, a structure in which a resin board is affixed to the front side surface of the skin material portion, or a structure in which a pocket portion is provided in the skin material portion and a resin board is inserted into the pocket portion ( Patent Document 1).

JP-A-8-323072

According to the above conventional structure, the resin board can be seen by the occupant and the appearance quality has been degraded. Moreover, since the pocket part was provided in the said skin material part, the work process at the time of manufacturing a seat back increased, and workability | operativity was bad.
An object of the present invention is to provide a seat back that can improve appearance quality and workability.

The feature of the present invention is that
A seat back frame;
A seat back pad supported by the seat back frame;
A skin material covering the seat back frame and the seat back pad;
With armrests,
The armrest is supported by the seatback frame so as to be swingable about a horizontal axis on the base end side, and is stowed and stored in the storage recess of the seatback pad, and the seat front side from the storage recess It is configured to be switchable to the usage state protruding to
The inner surface of the storage recess is a vehicle seat back covered with the skin material,
A resin board is stacked and fixed on the back surface of the skin material portion covering the back surface of the storage recess,
In the storage recess, the resin board exists between the skin material portion and the seat back pad. (Claim 1)

  According to this structure, since the resin board is piled up and fixed on the back surface of the skin material portion covering the inner surface of the storage recess, the storage recess can be shaped accurately. Further, since the resin board is superimposed on the back surface of the skin material portion and is not visible to the seated person, the appearance quality can be improved. And compared with the structure which provides the pocket part which inserts a resin board in the said skin material part, the work process at the time of manufacturing a seat back can be decreased, and workability | operativity can be improved. (Claim 1)

In the present invention,
When the resin board is sewn to the skin material portion and assembled to the seat back pad and the seat back frame integrally with the skin material portion, the following effects can be obtained. (Claim 2)

  Compared with the case where the resin board and the skin material part are separately assembled to the seat back pad and the seat back frame, workability can be improved. (Claim 2)

In the present invention,
On the back side of the peripheral part of the skin material part, a tongue piece extending from the back side to the outside of the skin material part is provided,
The tongue piece is inserted into the tongue piece insertion hole formed in the seat back pad,
When the locking portion provided on the tongue piece is locked to the locked portion provided on the back side of the seat back pad, the following action can be achieved. (Claim 3)

  By locking the locking portion provided on the tongue piece to the locked portion provided on the back side of the seat back pad, the remainder of the skin material part is drawn to the back side of the seat back pad, Generation of wrinkles in the skin material portion can be suppressed. Further, the appearance quality can be improved by making the seam line clear. (Claim 3)

In the present invention,
A plurality of the tongue pieces are dispersedly arranged on the back side of the peripheral portion of the skin material portion,
A predetermined number of the tongue pieces, the base end portion is sewn to the peripheral portion of the resin board and the peripheral portion of the skin material portion,
The remaining tongue pieces are not sewn to the resin board,
When the tension of the predetermined number of tongue pieces in the assembled state is set larger than the tension of the remaining tongue pieces in the assembled state, the following action can be achieved. (Claim 4)

The tension of the predetermined number of tongue pieces in the assembled state is set to be greater than the tension of the remaining tongue pieces in the assembled state. That is, the end of the skin material portion on the base end side of the predetermined number of tongue pieces is strongly pulled. Thereby, the remainder of the said skin material part can be drawn in strongly to the back surface side of a seat back pad, and generation | occurrence | production of the wrinkle of a skin material part can be suppressed more reliably. Further, the braking performance can be improved and the resin board can be reliably prevented from moving due to vibration or the like.
Further, since the base end portion of the predetermined number of tongue pieces is sewn together to the peripheral portion of the resin board and the peripheral portion of the skin material portion, even if a strong tension is applied to the predetermined number of tongue pieces. The predetermined number of tongue pieces do not come off the skin material portion.
And since the remaining tongue pieces are not sewn to the resin board, for example, the base end portions of all the tongue pieces are the peripheral portion of the resin board and the peripheral portion of the skin material portion. Compared with the structure that is sewn together, the sewing work can be performed easily, and the workability can be improved. (Claim 4)

In the present invention,
The tongue piece is formed in a bifurcated shape and branches into a first tongue piece portion and a second tongue piece portion at a longitudinal intermediate portion;
The locking portions are provided on the first tongue piece portion and the second tongue piece portion, respectively.
The locked portion is provided as a pair with respect to one forked tongue piece, and the locking portion of the first tongue piece portion and the locking portion of the second tongue piece portion are the pair of locked portions. Lock each part separately,
When the direction of the tension applied to the first tongue piece portion is different from the direction of the tension applied to the second tongue piece portion, the following action can be achieved. (Claim 5)

  Since the direction of the tension applied to the first tongue piece and the direction of the tension applied to the second tongue piece are different, the tongue piece can be pulled in either the height direction or the sheet width direction. it can. As a result, the braking force of the resin board is improved, and the occurrence of wrinkles in the skin material portion can be more reliably prevented. (Claim 5)

In the present invention,
The armrest is supported by the seat back frame via an armrest bracket,
The armrest bracket is disposed at the lower end of the back of the storage recess,
When the resin board is formed in a substantially flat plate shape and is positioned above the armrest bracket, the following effects can be obtained. (Claim 6)

Since the resin board is formed in a substantially flat plate shape and is located above the armrest bracket, for example, compared to the case where the resin board is also present on the lower end side of the back part of the storage recess, It becomes easy to assemble the armrest into the storage recess. As a result, the assemblability can be improved.
There is no resin board on the lower end side of the back part of the storage recess, but even if wrinkles etc. occur in the skin material part on the lower end side of the back part of the storage recess, this wrinkle etc. is at the base end part of the armrest. Since it is obscured and invisible to the occupant, the appearance quality does not deteriorate. (Claim 6)

In the present invention,
The length of the resin board in the sheet width direction is set longer than the recess width between the pair of left and right inner side surfaces of the storage recess,
The resin board and the skin material part, the width direction one side parts, and the width direction other side parts are sewn together,
Fitting grooves that enter the outer side in the width direction than the pair of left and right inner surfaces are formed along the vertical direction of the storage recess, on both sides in the width direction on the back surface side of the storage recess,
When the resin board and the skin material portion are sewn to each other in the width direction on one side and the other side in the pair of left and right fitting grooves, the following effects can be obtained. . (Claim 7)

  The positions of the resin board and the skin material portion with respect to the storage recess of the seat back pad can be accurately determined. Further, the resin board and the skin material portion can be easily fixed to the storage recess, and workability can be improved. Furthermore, the retainability of the resin board and the skin material portion by the seat back pad can be improved. (Claim 7)

According to the present invention,
It was possible to provide a seat back capable of improving appearance quality and improving workability.

Perspective view of seat back with armrest retracted Perspective view of seat back with armrest in use Perspective view of seat back with armrest removed Exploded perspective view of seat back AA sectional view of FIG. BB sectional view of FIG. The perspective view which looked at the right and left center part of the skin material from the back side GG sectional view of FIG. View of the seat back pad from the back side The figure which looked at the seat back pad which covered the skin material from the back side EE sectional view of FIG. The figure which shows the front-end | tip part of a tongue piece (a 1st tongue piece part, a 2nd tongue piece part)

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
1 to 3 show a bench type rear seat back for an automobile (hereinafter referred to as “seat back 1”). The seat back 1 constitutes a rear seat together with a seat cushion (not shown).

  The seat cushion supports the buttocks and thighs of the seated person, and the seat back 1 supports the back of the seated person. An armrest 2 having a rectangular cross section and a rectangular storage recess 3 for storing the armrest 2 are provided at the left and right central portions of the seat back 1. The storage recess 3 is open toward the seat front side Fr (vehicle front side). In each figure, symbol Rr is the seat rear side (vehicle rear side), and W is the seat width direction (vehicle width direction).

  As shown in FIGS. 2, 4, and 5, the seat back 1 covers a seat back frame 15, a seat back pad 4 supported by the seat back frame 15, and the seat back frame 15 and the seat back pad 4. A skin material 5 (trim cover) is provided.

  The seat back frame 15 is composed of a wire, a pipe material, a plate, or the like. The seat back pad 4 is made of urethane foam and is provided on the front surface of the seat back frame 15.

  As shown in FIGS. 2 and 5, the armrest 2 is supported by the seatback frame 15 so as to be swingable around the horizontal axis O on the base end 2 </ b> K side, and is stored in the storage recess 3 of the seatback pad 4. The upright storage state (see FIG. 1) and the use state (see FIG. 2) protruding from the storage recess 3 to the front side Fr of the seat can be switched. The inner surface of the storage recess 3 is covered with the skin material 5.

  The armrest 2 includes an armrest frame, an armrest pad, and an armrest trim that covers the armrest pad. When assembling the armrest 2 to the seat back frame 15, before assembling, the armrest pad is covered with an armrest trim, and an armrest bracket 11 (see FIG. 5) described later is assembled to the armrest 2. Further, the inner surface of the storage recess 3 of the seat back pad 4 is covered with the skin material 5, and then the armrest 2 is attached to the seat back frame 15 so as to be swingable (rotatable).

  As shown in FIGS. 6 and 7, one sheet is provided on the back surface 6 </ b> U of the vertically long rectangular first skin material portion 6 (corresponding to the “skin material portion” in the claims) covering the back surface 3 </ b> M of the storage recess 3. A vertically long rectangular flat resin board 7 is stacked and fixed. That is, the resin board 7 exists between the first skin material portion 6 and the seat back pad 4 in the storage recess 3. The material of the resin board 7 is PP (polypropylene).

  Thereby, the shape formation of the storage recessed part 3 can be performed cleanly. Moreover, since the resin board 7 is overlaid on the back surface 6U of the first skin material portion 6 and is not visible to the seated person, the appearance quality can be improved. For example, compared with a structure in which the pocket portion for inserting the resin board 7 is provided in the first skin material portion 6, the number of work steps can be reduced and workability can be improved.

  The resin board 7 is sewn to the first skin material portion 6 and is assembled to the seat back pad 4 and the seat back frame 15 integrally with the first skin material portion 6. Therefore, workability can be improved as compared with the case where the resin board 7 and the first skin material portion 6 are separately assembled to the seat back pad 4 and the seat back frame 15.

  As shown in FIG. 8, the first skin material portion 6 and the resin board 7 are sewn across the entire length of the width direction one side portions 6S1, 7S1 and the width direction other side portions 6S2, 7S2. Yes. The seam allowance F is 7 mm.

  In the width direction one side portions 6S1 and 7S1 of the first skin material portion 6 and the resin board 7, the end portion of the second skin material portion 26 covering one inner side surface 3S1 (see FIG. 6) of the storage recess 3 is also sewn. Has been. Further, end portions of the second skin material portion 26 covering the other inner side surface 3S2 of the storage recess 3 are also sewn on the width direction other side portions 6S2 and 7S2 of the first skin material portion 6 and the resin board 7. . In FIG. 8, the symbol N is a sewn part, and the length of the sewn part N is about 300 mm.

  As shown in FIG. 7, on the back surface 6U (see FIG. 6) side of the peripheral portion of the first skin material portion 6, one upper tongue piece extending from the back surface 6U side to the outside of the first skin material portion 6 8 (corresponding to a predetermined number of tongue pieces) and a pair of left and right lower tongue pieces 9 (corresponding to the remaining tongue pieces) are provided. As described above, the plurality of tongue pieces (the upper tongue piece 8 and the lower tongue piece 9) are distributed on the back surface 6 U side of the peripheral portion of the first skin material portion 6. The upper tongue piece 8 and the lower tongue piece 9 are made of the same material as the first skin material portion 6.

  The upper tongue piece 8 extends outward from the first skin material portion 6 from the longitudinal central portion of the upper end portion of the first skin material portion 6. The pair of left and right lower tongue pieces 9 extend outward from the first skin material portion 6 from the lower end portions of the widthwise side portions 6S1 and 6S2 of the first skin material portion 6.

  As shown in FIGS. 9 and 10, the upper tongue piece 8 and the lower tongue piece 9 are inserted into the plurality of tongue piece insertion holes 10 formed in the seat back pad 4 from the front side to the back side of the seat back pad 4. It is inserted separately for each. Furthermore, a locking hole H (corresponding to a locking portion) provided in the upper tongue piece 8 and the lower tongue piece 9 and a locked portion of a wire (not shown) built in the seat back pad 4 are provided. It is locked and connected by a hog ring.

  Thereby, the remainder of the first skin material portion 6 can be drawn into the back surface side of the seat back pad 4, and the generation of wrinkles in the first skin material portion 6 can be suppressed. Further, the appearance quality can be improved by making the seam line clear.

  As shown in FIG. 12, the diameter B2 of the locking hole H is about 8 mm. The locking hole H is located at a position where the distance B1 from the tip of the lower tongue piece 9 (or the upper tongue piece 8) is 20 mm. In this way, the lower tongue piece 9 (or the upper tongue piece 8) is prevented from being broken during hogging.

  When the locking hole H of the upper tongue piece 8 is locked to the locked portion, the upper tongue piece 8 is pulled strongly to lock the locking hole H of the upper tongue piece 8 to the locked portion. The tension of the upper tongue piece 8 in the assembled state is set to be larger than the tension of the lower tongue piece 9 in the assembled state. As a result, the upper end portion of the skin material portion 6 can be pulled strongly locally, and the remainder of the skin material portion 6 is strongly pulled into the back side of the seat back pad 4, so that the generation of wrinkles in the skin material portion 6 is more reliably performed. Can be suppressed. In addition, the braking performance can be improved and the resin board 7 can be reliably prevented from moving due to vibration or the like.

  As shown in FIGS. 7 and 11, the upper tongue 8 has a base end portion 8 </ b> K having a peripheral portion (upper end portion) of the resin board 7 and a peripheral portion (upper end portion) of the first skin material portion 6. It is sewed together with the peripheral portion of the third skin material portion 36 covering the upper inner surface of the storage recess 3. Therefore, even if a strong tension is applied to the upper tongue piece 8, the upper tongue piece 8 does not come off from the peripheral portion of the first skin material portion 6.

  As shown in FIG. 7, the lower tongue piece 9 (corresponding to the remaining tongue piece) is not sewn to the resin board 7, and the base end portion 9 </ b> K is a peripheral portion of the first skin material portion 6. Is sewn on. For example, the base end portions 8K and 9K of all the tongue pieces (the one upper tongue piece 8 and the pair of left and right lower tongue pieces 9) are connected to the peripheral portion of the resin board 7 and the peripheral portion of the first skin material portion 6. Compared with the structure that is sewn together, the sewing work can be performed easily, and the workability can be improved.

  The upper tongue piece 8 is formed in a bifurcated shape, and has a first upper tongue piece portion 8A (corresponding to the first tongue piece portion) and a second upper tongue piece portion 8B (second tongue piece) at an intermediate portion in the longitudinal direction substantially close to the root. Branching). The first upper tongue piece 8A and the second upper tongue piece 8B are set to have substantially the same length.

  The lower tongue piece 9 is also formed in a bifurcated shape, and has a first lower tongue piece portion 9A (corresponding to the first tongue piece portion) and a second lower tongue piece portion 9B (second tongue piece) at the longitudinal intermediate portion. Branching). The first lower tongue piece 9A is positioned above the second lower tongue piece 9B, and is set longer than the second lower tongue piece 9B.

  The locking holes H are provided at the distal ends of the first upper tongue piece 8A, the second upper tongue piece 8B, the first lower tongue piece 9A, and the second lower tongue piece 9B, respectively. Further, a pair of the locked portions is provided for the upper tongue piece 8 and a pair is provided for the pair of left and right lower tongue pieces 9.

  The locking hole H of the first upper tongue piece portion 8A of the upper tongue piece 8 and the locking hole H of the second upper tongue piece portion 8B are individually locked to the pair of locked portions. Further, the locking hole H of the first lower tongue piece portion 9A of the lower tongue piece 9 and the locking hole H of the second lower tongue piece portion 9B are individually locked to the pair of locked portions. ing.

  As shown in FIG. 7, the pair of left and right lower tongue pieces 9 are formed symmetrically (laterally symmetrical) with respect to the center in the width direction of the first skin material portion 6.

  As shown in FIG. 10, the first upper tongue piece 8A and the second upper tongue piece 8B are in a state where the locking hole H is locked to the locked portion (hereinafter referred to as “locking state”). It has a V shape with a large opening angle when viewed from the rear of the vehicle. That is, the first upper tongue piece portion 8A is inclined so as to be positioned upward as it is on the left side, and the second upper tongue piece portion 8B is inclined so as to be positioned as it is upward on the right side.

  The first lower tongue piece 9A extends substantially horizontally from the first skin material portion 6 in the sheet width direction in the locked state. Further, the second lower tongue piece portion 9B extends obliquely outward and downward from the first skin material portion 6 and is inclined so as to be positioned downward as it extends outward in the seat width direction. Accordingly, the directions of tension applied to the first upper tongue piece 8A, the second upper tongue piece 8B, the first lower tongue piece 9A, and the second lower tongue piece 9B are different.

  As described above, the first upper tongue piece portion 8A and the second upper tongue piece portion 8B can be pulled by applying tension in different directions, and the first lower tongue piece portion 9A and the second lower tongue portion 8B can be pulled. These can be pulled by applying tension in another direction to the tongue piece 9B. That is, the upper tongue piece 8 and the lower tongue piece 9 can be pulled in both the height direction and the sheet width direction, and the braking force on the resin board 7 is improved. Moreover, it can suppress more reliably that wrinkles generate | occur | produce in the 1st skin material part 6. FIG.

  As shown in FIG. 5, the armrest 2 is supported by the seat back frame 15 via the armrest bracket 11. The armrest bracket 11 includes a horizontally long rectangular flat plate-like bracket body 12 that faces the base end 2K of the armrest 2, and a triangular plate-like mounting plate that extends perpendicularly from the longitudinal end of the bracket body 12 to the seat front side Fr. Part 23.

  The bracket body 12 is set longer than the width (length in the seat width direction) of the armrest 2 on the base end portion 2K side, and the mounting plate portion 23 faces the side surface of the base end portion 2K. An attachment plate portion 23 is attached to the base end portion 2 </ b> K of the armrest 2 via a support shaft 27 so as to be rotatable around the horizontal axis O. The armrest bracket 11 is disposed at the lower end of the back portion 3J (see FIG. 3) of the storage recess 3, and the resin board 7 is located above the bracket body 12 of the armrest bracket 11.

  Thereby, for example, the armrest 2 can be easily assembled to the storage recess 3 as compared with the case where the resin board 7 is also present on the lower end side of the back portion 3J of the storage recess 3. As a result, the assemblability can be improved. The resin board 7 does not exist on the lower end side of the back portion 3J of the storage recess 3, but even if wrinkles or the like occur in the skin material portion 6 on the lower end side of the back portion 3J of the storage recess 3, Since it is covered with the base end portion 2K of the armrest 2 and is not visible to the occupant, the appearance quality is not deteriorated.

  As shown in FIG. 6, the length L in the sheet width direction of the resin board 7 and the first skin material portion 6 is set longer than the recess width D between the pair of left and right inner side surfaces 3S1, 3S2 of the storage recess 3. Yes.

  In addition, fitting grooves 13 that enter the width direction outward side of the pair of left and right inner side surfaces 3S1 and 3S2 of the storage recess 3 are formed in both sides of the storage recess 3 on the back surface 3M side in the vertical direction of the storage recess 3. It is formed along. Then, the width direction one side portions 6S1, 7S1 and the other side portions 6S2, 7S2 of the resin board 7 and the first skin material portion 6 which are sewn together are inserted and fitted into the pair of left and right fitting grooves 13, respectively. Yes.

  The insertion depth C of the width direction one side parts 6S1, 7S1 and the other side parts 6S2, 7S2 with respect to the fitting groove 13 is 7 mm. As described above, the length of the sewn portion N is about 300 mm. Since the length of 300 mm is long, the first skin material portion 6 can be stably fixed.

  Thereby, the position of the resin board 7 and the 1st skin material part 6 with respect to the storage recessed part 3 of the seat back pad 4 can be determined correctly. In addition, the resin board 7 and the first skin material portion 6 can be easily fixed to the storage recess 3 and workability can be improved. Furthermore, the retainability of the resin board 7 and the first skin material portion 6 by the seat back pad 4 can be improved.

  The resin board 7 is only fitted in the fitting groove 13 provided in the seat back pad 4. If a strong force is applied, the resin board 7 may move or come off the fitting groove 13. It is done. However, as described above, since the upper tongue piece 8 co-sewn with the resin board 7 is pulled strongly and the locking hole H of the upper tongue piece 8 is locked to the locked portion, the resin board 7 moves. Or disengagement from the fitting groove 13 can be prevented. Further, since the stitched portion N of the upper tongue piece 8 that is sewn together is strong, the upper tongue piece 8 does not come off from the first skin material portion 6 as described above.

  The lower tongue piece 9 suppresses the occurrence of wrinkles in the first skin material portion 6 by tightly winding the remainder of the first skin material portion 6, and improves the finish of the seam line to improve the appearance quality. I am letting. Since the first skin material portion 6 is sandwiched between the seat back frame 15 and the base end portion 2K of the armrest 2 at the lower portion of the storage recess 3, the first skin material even if a strong force is applied to the first skin material portion 6. The material portion 6 is hardly displaced.

[Another embodiment]
The numerical values given in the above embodiment are examples, and are not limited to the above numerical values.

2 Armrest 2K Base end (base end of armrest)
3 storage recess 3J storage recess back 3M storage recess back surface 3S1 storage recess inner surface (one inner surface)
3S2 The inner surface of the storage recess (the other inner surface)
4 Seat back pad 5 Skin material 6 Skin material part (1st skin material part)
6S1 Width direction one side portion 6S2 of the skin material portion Width direction other side portion 6U of the skin material portion Back surface 7 of the skin material portion Resin board 7S1 Width direction one side portion 7S2 of the resin board Width direction other side portion 8 of the resin board Tongue piece (Upper tongue, predetermined number of tongues)
8A First tongue piece (first upper tongue piece)
8B Second tongue piece (second upper tongue piece)
8K base end (base end of a predetermined number of tongues, base end of upper tongues)
9 Tongue (lower tongue, remaining tongue)
9A 1st tongue piece (first lower tongue piece)
9B Second tongue piece (second lower tongue piece)
10 Tongue piece insertion hole 11 Armrest bracket 13 Fitting groove 15 Seat back frame D Recess width (recess width between a pair of left and right inner surfaces of the storage recess)
Fr Seat front side H Locking part (Locking hole)
L Length of the resin board in the sheet width direction O Horizontal axis

Claims (7)

A seat back frame;
A seat back pad supported by the seat back frame;
A skin material covering the seat back frame and the seat back pad;
With armrests,
The armrest is supported by the seatback frame so as to be swingable about a horizontal axis on the base end side, and is stowed and stored in the storage recess of the seatback pad, and the seat front side from the storage recess It is configured to be switchable to the usage state protruding to
The inner surface of the storage recess is a vehicle seat back covered with the skin material,
A resin board is stacked and fixed on the back surface of the skin material portion covering the back surface of the storage recess,
A seat back in which the resin board exists between the skin material portion and the seat back pad in the storage recess.   The seat back according to claim 1, wherein the resin board is sewn to the skin material portion and assembled to the seat back pad and the seat back frame integrally with the skin material portion. On the back side of the peripheral part of the skin material part, a tongue piece extending from the back side to the outside of the skin material part is provided,
The tongue piece is inserted into the tongue piece insertion hole formed in the seat back pad,
The seat back according to claim 1 or 2, wherein a locking portion provided on the tongue piece is locked to a locked portion provided on a back side of the seat back pad. A plurality of the tongue pieces are dispersedly arranged on the back side of the peripheral portion of the skin material portion,
A predetermined number of the tongue pieces, the base end portion is sewn to the peripheral portion of the resin board and the peripheral portion of the skin material portion,
The remaining tongue pieces are not sewn to the resin board,
The seat back according to claim 3, wherein the tension of the predetermined number of tongue pieces in the assembled state is set larger than the tension of the remaining tongue pieces in the assembled state. The tongue piece is formed in a bifurcated shape and branches into a first tongue piece portion and a second tongue piece portion at a longitudinal intermediate portion;
The locking portions are provided on the first tongue piece portion and the second tongue piece portion, respectively.
The locked portion is provided as a pair with respect to one forked tongue piece, and the locking portion of the first tongue piece portion and the locking portion of the second tongue piece portion are the pair of locked portions. Lock each part separately,
The seat back according to claim 3 or 4, wherein a direction of tension applied to the first tongue piece portion is different from a direction of tension applied to the second tongue piece portion. The armrest is supported by the seat back frame via an armrest bracket,
The armrest bracket is disposed at the lower end of the back of the storage recess,
The seat back according to any one of claims 1 to 5, wherein the resin board is formed in a substantially flat plate shape and is located above the armrest bracket. The length of the resin board in the sheet width direction is set longer than the recess width between the pair of left and right inner side surfaces of the storage recess,
The resin board and the skin material part, the width direction one side parts, and the width direction other side parts are sewn together,
Fitting grooves that enter the outer side in the width direction than the pair of left and right inner surfaces are formed along the vertical direction of the storage recess, on both sides in the width direction on the back surface side of the storage recess,
The width direction one side part and other side part by which the said resin board and the skin material part were mutually sewn are inserted and fitted to a pair of right and left said fitting grooves, respectively. Seat back.

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