JP2013056018A - Vehicle seat back - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat back in which a back board is set, the back board having necessary rigidity, stretching a firm surface skin material, and disposed not to be angular.SOLUTION: The vehicle seat back 1 includes: the surface skin material 20 for covering the back side of a seat back body 10, a bag-shaped portion 23 formed by overlapping a surface material 23A on a surface (inside surface of an intermediate piece 22B) of the surface skin material 20, and formed into a bag shape; and the back board 25 provided in a manner to be filled in the bag-shaped portion 23 in a direction overlapping the surface material 23A to cover the back side of the seat back body 10, and harder than the surface skin material 20. The back board 25 has a plate-shaped peripheral edge softer than the center part, and the peripheral edge part has a height larger than that of the bag-shaped portion 23, and the softer peripheral edge is disposed to be pressed and bent along the shape of the bag-shaped portion 23 by the tension of the bag-shaped portion 23, when the back board is set in the bag-shaped portion 23.

Description

  The present invention relates to a vehicle seat back. More specifically, the present invention relates to a vehicle seat back in which a back board is set in a bag-like portion formed in a part of a skin material covered by a back portion of a seat back main body.

  2. Description of the Related Art Conventionally, in a vehicle seat, a configuration is known in which a backboard is disposed on a back portion of a seat back so that flatness and rigidity of the back portion are increased (see Patent Document 1). The backboard is formed of a soft synthetic resin plate, and is set by being packed in a bag-like portion formed in a part of the skin material covered with the back portion of the seatback.

JP 2007-229306 A

  However, in the prior art described in Patent Document 1, since the entire backboard is soft, the backboard can be bent and disposed so as not to make a corner in the bag-like portion, but has sufficient rigidity. There is a problem that it cannot be obtained. The present invention was devised as a solution to the above-mentioned problems, and the problem to be solved by the present invention is that it is possible to secure the necessary rigidity for the vehicle seat back and to the skin material. The purpose is to set a backboard that can be arranged so as to have tension and prevent the skin material from having a corner.

In order to solve the above problems, the vehicle seat back of the present invention takes the following means.
1st invention is the skin material covered by the back part of a seat back main body, the bag-like part formed by overlapping a face material on the constituent surface of this skin material, and formed into a bag shape, and the surface in the bag-like part A vehicle seat back having a backboard harder than the skin material provided in a state of being packed in a direction in which the material and the surface are overlapped and covering the back surface portion of the seat back body. The backboard has a plate-shaped peripheral portion that is softer than the central portion, and at least a part of the peripheral portion is formed to be larger than the inner diameter of the bag-shaped portion, and the bag is set in the bag-shaped portion. The peripheral portion is arranged in a state of being pushed and bent along the shape of the bag-like portion by the tension action of the shape-like portion.

  According to the first invention, since at least a part of the peripheral portion of the backboard is formed to be larger than the inner diameter of the bag-like portion, the backboard is press-fitted into the bag-like portion, and the bag-like portion (skin material) ) Is set with tension. The backboard has a peripheral edge that is softer than the central part. When the backboard is set in the bag-like part, the peripheral part is pushed and bent along the shape of the bag-like part by the tension action of the bag-like part. As a result, the skin material is arranged in a state in which the corners are not raised. In this way, the vehicle seat back can secure the necessary rigidity due to the rigidity of the center part, and the skin material is stretched by the peripheral edge part, and the skin material is arranged so that the corners do not stand up. A backboard that can be set up.

  The second invention is the following structure in the first invention described above. In other words, the backboard is composed of a soft plate member having a large plate area and a hard plate member having a small plate area joined together, so that the peripheral part is softer than the central part and the inner diameter of the bag-like part. Is formed in a large shape, a soft plate material having a large plate area is arranged on the outer surface side in the bag-like portion, and a hard plate material having a small plate area is arranged on the inner surface side.

  According to the second aspect of the invention, the configuration in which the central portion of the backboard is hard and the peripheral portion is soft is realized by a simple configuration in which two plates having different rigidity and size are joined together. be able to. The backboard has a hard plate with a small plate area disposed on the inner surface side of the bag-shaped portion, and a soft plate with a large plate area disposed on the outer surface side of the bag-shaped portion. Since the portion is covered with the soft plate material from the outer surface side, the soft plate material becomes a cushion material, and the corner portion of the hard plate material can be prevented from being raised on the skin material.

  A third invention has the following configuration in the first or second invention described above. That is, both the bag-like portion and the backboard are formed in a rectangular bag shape, and the backboard is inserted in the longitudinal direction of the bag-like portion through an opening formed on one side having a short side length. The bag-like portion is provided in a state where it is press-fitted and pressed between two opposing long sides.

  According to the third aspect of the invention, the backboard is set in a state where the two long sides are pressed against the long side portion of the bag-like portion and are sandwiched. As a result, the bag-like portion (skin material) is in a good state that does not wrinkle as a state in which the bag-like portion (skin material) is stretched between the two sides with the long side length, that is, between the short dimensions and pulled from both ends. It is in a stretched state. Also, the backboard is provided with the two long side lengths pressed between the long side portions of the bag-like portion, so that the insertion position of the bag-like portion can be satisfactorily determined. .

It is the perspective view which looked at the vehicle seat back of Example 1 from the back side. It is the perspective view which showed a mode that the skin material was turned up and a backboard was inserted in a bag-shaped part. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is the VV sectional view taken on the line of FIG. It is the perspective view which showed the form of the back board of the vehicle seat back of Example 2. FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

  First, the configuration of the vehicle seat back 1 according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the vehicle seat back 1 of the present embodiment constitutes a backrest portion of the vehicle seat, and although not shown, a seating portion installed on the floor of the vehicle The seat cushion is connected to the rear end of the seat cushion. As shown in FIGS. 2 to 3, the vehicle seat back 1 covers the entire surface of a seat back body 10 constituted by a back frame 11 constituting the skeleton and a back pad 12 serving as a cushion portion. In this way, the cover material 20 made of cloth is applied.

  The back frame 11 is configured by a steel material assembled in a frame shape, and forms an internal skeleton along the periphery of the vehicle seat back 1. The back pad 12 is formed in a shape that forms the outer shape of the seat back main body 10 with foamed urethane, and has a structure with a relatively low rebound cushioning property that can elastically and softly receive the backrest load of the seated occupant. Has been. The back pad 12 is assembled to the front portion of the back frame 11 from the front side of the seat, and the overhanging portions 12A that are formed on the upper, lower, left, and right peripheral portions and project to the rear side of the seat are It is assembled as a state where it is put on each of the upper, lower, left and right frame sides so as to be wound from the outer peripheral side to the seat rear side.

  The back pad 12 is elastically supported from the rear side inside the frame of the back frame 11 by a support spring 11A (contour mat) composed of a plurality of wires assembled across the frame side portions of the back frame 11. In this state, the backrest load of the seated occupant is received by the elastic support at the center by the support spring 11A and the strong support at the periphery by the back frame 11.

  The skin material 20 has a configuration in which a plurality of skin pieces formed according to the shape of each predetermined partition region such as the front and rear surfaces, the left and right side surfaces, and the upper side surface of the back pad 12 are stitched together and joined together. It has become. Specifically, the skin material 20 includes a front side covering surface portion 21 formed by connecting a plurality of skin pieces so as to cover the front surface, the left and right side surfaces, and the top surface of the back pad 12 (seat back body 10). And a back-side cover surface portion 22 formed by connecting a plurality of skin pieces so as to cover the rear surface (back surface) of the back pad 12 (seat back main body 10). As shown in FIGS. 1 to 2, the latter back side cover surface portion 22 is an edge portion whose upper edge portion is turned to the seat rear side of the portion covering the upper surface of the back pad 12 of the front side cover surface portion 21. The edge portions on the left and right sides are separated from the front cover surface portion 21.

  The back side cover surface portion 22 is covered with the skin material 20 on the back pad 12 and the back side cover surface portion 22 is turned to the back side of the back pad 12, and then the left and right edges of the back side cover surface portion 22. Are coupled to the respective rear edge portions of the portion of the front side covering surface portion 21 covered by the left and right side surfaces of the back pad 12 by slide fasteners 24 and 24 (line fasteners), respectively, so that the back pad is mutually connected to the front side covering surface portion 21. 12 are connected to each other in an annular cross-sectional state.

  Here, the back side cover surface portion 22 is configured such that the center portion in the sheet width direction is formed by connecting three skin pieces (upper piece 22A, intermediate piece 22B, and lower piece 22C) in the sheet height direction. . Further, the left and right side portions of the back side cover surface portion 22 are long in the seat height direction so as to be adjacent to each other across the three skin pieces (the upper piece 22A, the intermediate piece 22B, and the lower piece 22C). The side pieces 22D and 22D are stitched and joined together. These side pieces 22D and 22D are surface portions that respectively cover the protruding portions 12A and 12A on the left and right sides of the back pad 12 from the rear side of the seat.

  Between the outer edge portions of the side pieces 22D and 22D and the rear edge portions of the left and right sides of the front side cover surface portion 21 are the respective tooths constituting the slide fasteners 24 and 24, respectively. Element) and a slider that engages and separates these service teeth by a sliding operation. By the combination of these slide fasteners 24, 24, the front side cover surface part 21 and the back side cover surface part 22 are joined together in an annular cross-section with the back pad 12 sandwiched between them. The covering surface portion 22 is stretched so as to be tensioned in the sheet width direction as a whole.

  Further, in addition to the fixing by the slide fasteners 24, 24, the back side covering surface portion 22 is sewn together with a resin hook 22E at the stitched portion between the intermediate piece 22B and the lower piece 22C as shown in FIG. The upper piece 22A and the intermediate piece 22B are also tensioned in the seat height direction by pulling the hook 22E downward and hooking it on the wire 11B fixed to the back frame 11. It is stretched as a state. Also, the lower piece 22C, which is disposed below the hook 22E, is not shown in the figure, but the lower edge thereof is secured to the seat height by means that is hooked to the back frame 11 such as a hook (not shown). It is stretched as tension is applied in the vertical direction.

  Here, the upper piece 22A of the back side cover surface portion 22 is adapted to the shape of this portion so as to cover the overhanging portion 12A that protrudes and hangs down on the back side of the seat above the back pad 12 from the back side of the seat. It is formed in the size shape. Further, the intermediate piece 22B is stretched so as to cover an area portion that is deviated downward from the overhanging portion 12A of the upper portion of the back pad 12, that is, the space portion 12B in the center of the back side where the back pad 12 is not formed. ing. Similarly to the intermediate piece 22B, the lower piece 22C is also stretched so as to cover the space portion 12B in the lower central portion on the back side where the back pad 12 is not formed, following the intermediate piece 22B. Here, as shown in FIG. 1, a pocket 22C1 that can be used as a container for a passenger of a rear seat (not shown) is formed on the outer surface of the lower piece 22C, that is, the surface on the rear side of the seat. ing. This pocket 22C1 is formed by sewing another bag on the surface of the lower piece 22C and sewing it into a bag shape so that the upper part opens.

  Here, the intermediate piece 22B is inclined toward the inner side of the seat back body 10 (the front side of the seat) from the stitched portion with the upper piece 22A toward the lower side due to the hook 22E hooking structure described above. Is stretched. Further, the lower piece 22C is inclined and inclined toward the outer side (the rear side of the seat) of the seat back body 10 from the stitched portion with the intermediate piece 22B that has entered the inside of the seat back body 10 to the lower side. Has been. Thereby, the surface shape formed by the intermediate piece 22B and the lower piece 22C is formed in a concave shape when viewed from the seat rear side, and the intermediate piece 22B and the lower piece 22C are flush with each other. Compared to the configuration that is straightly stretched in the shape, a vacant space that allows the passenger in the rear seat to extend his / her leg is secured.

  The intermediate piece 22B and the lower piece 22C are stretched with tension applied in the seat width direction and height direction as described above. However, since the rigidity of the intermediate piece 22B and the lower piece 22C is low, If a force is applied from the outside such as a passenger's foot hits, there is a risk of being strongly depressed and torn or extended. Further, even in a normal tensioned state, wrinkles are likely to be caused or drowned. Therefore, as shown in FIGS. 2 to 4, the intermediate piece 22 </ b> B has a bag-like portion 23 formed on the inner side surface (corresponding to the “constituent surface” of the present invention) and the hard backboard 25 is inserted. As shown in FIGS. 3 and 5, the lower piece 22C is provided with a thick plate-like felt material 26 stitched to the inner surface thereof. Accordingly, the intermediate piece 22B is configured to be supported by the backboard 25 with a high structural strength that is difficult to bend even when receiving the external force described above. Further, the lower piece 22C is configured to be supported by the felt material 26 with a structural strength that does not hinder the usability of the pocket 22C1 and is difficult to bend even when subjected to the external force described above.

  Hereinafter, the configuration of the bag-like portion 23 and the backboard 25 provided in the above-described intermediate piece 22B will be described in detail with reference to FIGS. The bag-like portion 23 is stitched into a horizontally-long rectangular bag shape by overlapping another cloth-made face material 23A on the inner side surface (the surface facing the inside of the seat back main body 10) of the intermediate piece 22B. It becomes the composition. Specifically, as shown in FIG. 2, the bag-like portion 23 has the long sides S1 and S2 on the upper and lower sides and the short side S3 on the left side in the figure stitched, and the short side S4 on the right side in the figure is not stitched. In addition, it is configured as an opening 23 </ b> B serving as an insertion port for the backboard 25.

  The backboard 25 is made of a double-structured plate material in which a rectangular hard plate 25A made of hard polypropylene and a rectangular soft plate 25B made of a soft felt material rich in cushioning properties are joined together by an adhesive. Is formed. Since the hard plate 25A is made of a hard resin, the hard plate 25A is relatively lightweight and has a sufficiently high rigidity and strength as compared with the skin material 20 (intermediate piece 22B). The soft plate 25B is formed of a felt material that is softer than the hard plate 25A, and is formed in a rectangular shape that is slightly larger than the hard plate 25A. The hard plate 25A is disposed at the center of the soft plate 25B, and the peripheral edge of the soft plate 25B extends over the entire periphery of the soft plate 25B.

  The soft plate 25B is set such that the height dimension Hc in the short direction Ls is larger than the height dimension Ha (inner diameter dimension between the sewing margins) between the long sides S1, S2 on the upper and lower sides of the bag-like portion 23. Yes. The width dimension Wc in the longitudinal direction Ld of the soft plate 25B is the width dimension Wa between the short sides S3 and S4 of the bag-like portion 23 (the dimension between the seam allowance of the short side S3 and the opening 23B of the short side S4). Slightly smaller and approximately the same size. The hard plate 25A is set such that the height dimension Hb in the short direction Ls is smaller than the height dimension Ha in the short direction Ls of the bag-like portion 23, and the width dimension Wb in the longitudinal direction Ld is It is set smaller than the width dimension Wa of the bag-like portion 23 in the longitudinal direction Ld.

  As a result, the backboard 25 is press-fitted in such a manner that the backboard 25 is sandwiched between the upper and lower long sides S1 and S2 in the bag-like portion 23 by setting each dimension in the short side direction Ls and the long side direction Ld of the soft plate 25B. Thus, the bag-like portion 23 is provided so as to cover the back portion of the seat back main body 10 as a state in which the face material 23A and the intermediate piece 22B are packed in the direction of overlapping. The intermediate piece 22 </ b> B is further stretched by the press-fitting of the backboard 25. Further, the back board 25 is provided in a state in which the soft plate 25B is pressed between the long sides S1 and S2 of the bag-like portion 23 in the short direction Ls, whereby the longitudinal direction Ld with respect to the bag-like portion 23 is provided. The insertion position is held in a well-positioned state.

  Here, in the backboard 25, the soft plate 25B is disposed on the outer surface side (seat rear side) in the bag-shaped portion 23, and the hard plate 25A is disposed on the inner surface side (sheet front side) in the bag-shaped portion 23. It is inserted in the bag-like part 23 in the direction of Here, a protective sheet made of vinyl chloride (not shown) is coated on the entire surface of the soft plate 25B. Thereby, the fiber of the felt material forming the soft plate 25B is frayed or worn due to rubbing generated between the intermediate piece 22B and the face material 23A when inserted into the bag-like portion 23 or after use. It becomes difficult to do. Further, when the soft plate 25B is inserted into the bag-like portion 23, slipping is improved by the protective sheet, so that the soft plate 25B is not easily caught in the bag-like portion 23, and the insertion work into the bag-like portion 23 is easy. Can be done.

  A hook-and-loop fastener 25C in which a plurality of raised hooks are formed is attached to the surface of the hard plate 25A facing the inner surface in the bag-like portion 23. Since the surface material 23A of the bag-like portion 23 is made of cloth, the surface fastener 25C is entangled with the surface material 23A by pressing the raised hook against the surface material 23A. Therefore, after the backboard 25 is inserted into the bag-shaped portion 23, the back fastener 25C is pressed against the surface material 23A of the bag-shaped portion 23 and joined to the bag-shaped portion 23, so that the backboard 25 is more appropriately placed inside the bag-shaped portion 23. It is positioned and held by.

  As shown in FIG. 3, the backboard 25 has a constant thickness with the peripheral portion of the soft plate 25 </ b> B protruding from the peripheral edge of the hard plate 25 </ b> A when inserted into the bag-like portion 23. Due to the tension action of the bag-like portion 23 whose tension is increased with the insertion of the bag-like portion 23, the bag-like portion 23 is pushed and bent along the shape of the bag-like portion 23 toward the inside. As described above, the backboard 25 has a configuration in which at least a part of the peripheral portion thereof is formed to be larger than the inner diameter of the bag-like portion 23, so that the bag-like portion 23 is press-fitted into the bag-like portion 23. 23 (skin material 20) is set in a tensioned state.

  The backboard 25 has a peripheral edge portion (soft plate 25B) that is softer than the central portion (hard plate 25A). When the backboard 25 is set in the bag-like portion 23, the peripheral edge portion is the bag-like portion 23. By being pushed and bent along the shape of the bag-like portion 23 by the tension action, the intermediate piece 22B (skin material 20) is disposed in a state in which no corners are formed. That is, a shape that draws a smooth curve can be formed in the intermediate piece 22B that covers the backboard 25 from the outer surface side so that the shape (highlight) of the corners of the peripheral edge of the backboard 25 does not come out. As described above, the vehicle seat back 1 can ensure the necessary rigidity for the back surface portion of the seat back body 10 by the rigidity of the central portion (hard plate 25A), and the central portion is covered from the outer surface side. The backboard 25 can be disposed so that the skin material 20 (intermediate piece 22B) is stretched by the peripheral edge of the provided soft plate 25B and the skin material 20 does not have a corner.

  In addition, the configuration in which the central portion of the backboard 25 is hard and the peripheral portion is soft is a simple configuration in which two plate materials (hard plate 25A and soft plate 25B) having different rigidity and size are joined together. Can be embodied. In the backboard 25, a hard plate 25A having a small plate area is disposed on the inner surface side of the bag-shaped portion 23, and a soft plate 25B having a large plate area is disposed on the outer surface side of the bag-shaped portion 23. As a result, the corners of the hard plate 25A are covered from the outer surface side by the soft plate 25B, so that the soft plate 25B serves as a cushioning material so that the corners of the hard plate 25A do not float on the skin material 20. be able to.

  The backboard 25 is set in a state in which the soft plate 25B is pressed between the long sides S1 and S2 of the bag-like portion 23 and pressed. As a result, the bag-like portion 23 (skin material 20) is in a good state that does not wrinkle as a state in which the bag-like portion 23 (skin material 20) is stretched between the long sides S1 and S2, that is, between the short dimensions and pulled from both ends. It is in a stretched state. Further, the back board 25 is provided in a state in which the soft plate 25B is pressed between the long sides S1 and S2 of the bag-like portion 23, thereby positioning the insertion position in the longitudinal direction Ld with respect to the bag-like portion 23. Will be done well.

  Then, the structure of the vehicle seat back 1 of Example 2 is demonstrated using FIG. The backboard 25 in the present embodiment has the same configuration as that of the first embodiment in that the hard plate 25A is arranged at the center thereof, but the soft portion of the peripheral portion is joined to the peripheral portion of the hard plate 25A. The frame-shaped soft plate 25B is formed. The hard plate 25A is made of the same hard polypropylene as the configuration shown in the first embodiment, and the soft plate 25B is also made of a soft felt material rich in cushioning properties similar to the configuration shown in the first embodiment. Is formed.

  Specifically, the soft plate 25B is formed to have a thickness greater than that of the hard plate 25A, and when the soft plate 25B is inserted into the bag-like portion 23 and is bent by the tensile action received from the bag-like portion 23, the soft plate 25B A surface portion that is flush with the peripheral edge of the hard plate 25A or a surface portion that slightly swells than the hard plate 25A is formed so that the corner portion does not stand up as a corner on the bag-like portion 23 (intermediate piece 22B). It is configured as follows. In this way, the configuration in which the central portion of the backboard 25 is hard and the peripheral portion is soft is realized by a simple configuration in which the soft plate 25B is arranged so as to surround the peripheral portion of the hard plate 25A disposed in the central portion. can do. The soft plate 25B does not have to be formed in a frame shape. For example, a soft material such as a band-shaped foamed urethane is wound around the periphery of the hard plate 25A to form a frame shape. Also good.

  As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than the said Example. For example, the means for joining the member forming the hard center portion of the backboard and the member forming the soft peripheral edge portion may not be based on the bonding by the adhesive shown in the above-described embodiment. In addition to what is joined using a needle or an adhesive tape, it may be joined by sewing.

  In addition, the structure that makes the central part of the backboard hard and the peripheral part soft is made by attaching soft materials (for example, felt) of the same material of different sizes together, and the central part that is superimposed is harder than the peripheral part. It may be formed as a result. The hard part only needs to be formed so as to have sufficiently high rigidity and strength compared to the skin material, and the material can be applied to various materials such as resin, rubber, metal, Further, as described above, it may be hardened by stacking a plurality of soft members such as felt. In addition, the material applied to the soft material can be bent to such an extent that the corner of the skin material does not stand up due to the tension of the skin material so that the corners of the hard part such as urethane foam and rubber can be prevented from floating on the skin material. What is necessary is just to have a degree of flexibility.

  Further, the bag-like portion formed on the skin material may be a bag-like shape that opens upward, and the backboard may be inserted into the bag-like portion from the upper side and set. In addition, the insertion direction of the backboard into the bag-like portion is, for example, the case where the bag-like portion is formed in a rectangular shape and is inserted with an opening formed in the longitudinal direction as shown in the above embodiment. However, an opening formed in the short direction may be inserted. In addition, the shape of the bag-like portion may be a shape other than a rectangle such as a square, a triangle, or a trapezoid.

  Moreover, the structure which forms the soft peripheral part of a backboard larger than the internal diameter of a bag-like part is formed in at least one part of the peripheral part of a backboard, and a bag is made so that a corner | angular material may not stand up. The backboard can be inserted so that the shape portion is stretched. In addition, the configuration in which the peripheral portion of the backboard is soft is necessary in a portion where the corner of the central hard portion stands on the skin material unless a soft configuration is provided, and the entire periphery of the central portion is not necessarily required. It may not be provided so as to surround.

DESCRIPTION OF SYMBOLS 1 Vehicle seat back 10 Seat back main body 11 Back frame 11A Support spring 11B Wire 12 Back pad 12A Overhang | projection part 12B Space part 20 Skin material 21 Front side cover surface part 22 Back side cover surface part 22A Upper piece 22B Intermediate piece (configuration surface)
22C Lower piece 22C1 Pocket 22D Side piece 22E Hook 23 Bag-like portion 23A Face material 23B Opening 24 Slide fastener 25 Backboard 25A Hard plate 25B Soft plate 25C Surface fastener 26 Felt material S1, S2 Long side S3, S4 Short side Ha Height Dimensions Hb Height dimensions Hc Height dimensions Wa Width dimension Wb Width dimension Wc Width dimension Ld Longitudinal direction Ls Short direction

Claims (3)

A skin material that is covered by the back portion of the seat back body, a bag-like portion that is formed into a bag shape by overlaying a face material on the constituent surface of the skin material, and a direction in which the face material and the surface are overlapped in the bag-like portion A vehicular seat back having a backboard harder than the skin material, which is provided as a state of covering the back portion of the seatback main body packed in,
The backboard has a plate-shaped peripheral edge softer than the central part, and at least a part of the peripheral edge is formed larger than the inner diameter of the bag-like part, and is set in the bag-like part. A vehicle seat back, wherein a peripheral portion is disposed in a state of being pushed and bent along the shape of the bag-like portion by a tension action of the bag-like portion when the bag-like portion is pressed. The vehicle seat back according to claim 1,
The backboard is composed of a soft plate member having a large plate area and a hard plate member having a small plate area joined together, so that the peripheral portion is softer than the central portion and more than the inner diameter of the bag-like portion. Is formed in a large shape, the soft plate material having a large plate area is arranged on the outer surface side in the bag-like portion, and the hard plate material having a small plate area is arranged on the inner surface side. Vehicle seat back. The vehicle seat back according to claim 1 or 2,
Both the bag-like portion and the backboard are formed in a rectangular bag shape, and the backboard extends in the longitudinal direction of the bag-like portion from an opening formed on one side having a short side length of the bag-like portion. A vehicular seat back provided in a state where the bag-like portion is press-fitted between two opposing long sides of the bag-like portion.

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