Vehicle seat

Abstract

To provide a vehicular seat including a seat back frame which supports a headrest without processing a lower end part of a pillar.SOLUTION: The invention relates to a vehicular seat including: a seat back; a headrest provided on the seat back; and a seat back frame forming a framework of the seat back. The seat back frame includes: a pair of back side frames 11; an upper frame which connects the pair of back side frames; and headrest guides 17 which hold headrest pillars 31. The upper frame has holder parts 15 which respectively hold the headrest guides. Each holder part has a cover part 15c which covers a lower end part of a pillar held by the headrest guide at a lower end of the holder part.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a seat back frame that supports a headrest pillar.

Background Art

[0002] A vehicle seat includes a seat cushion, a seat back, and a headrest, and a frame member forming a skeleton is provided in the seat back and the seat cushion. The frame member is composed of an arch-shaped frame body, and a headrest guide through which a pillar (also called a stay) hanging from the headrest is inserted is provided at the upper part of the frame member. Conventionally, the headrest guide is attached to the upper part of the frame member by being recessed by press working or the like and welded or the like. Patent Document 1 discloses a headrest guide (referred to as a support bracket in Patent Document 1) attached to a fitting portion formed in a frame member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a conventional vehicle seat, since the pillar of the headrest is longer than the headrest guide, when the pillar is inserted into the headrest guide, the lower end of the pillar is positioned below the lower end of the headrest guide. Therefore, the lower end of the pillar was processed into a hemispherical shape in case it abutted against the back of the occupant (seated person) or protruded from the seat back. However, since this hemispherical processing is costly and time-consuming, a structure for holding the headrest without processing the lower end portion of the pillar has been demanded.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a vehicle seat provided with a seat back frame that holds a headrest without processing the lower end portion of a pillar.

Means for Solving the Problems

[0006] The above problems are solved by a vehicle seat including a seat back, a headrest provided on the seat back, and a seat back frame forming the skeleton of the seat back, wherein the seat back frame includes a pair of back side frames, an upper frame connecting the pair of back side frames, and a headrest guide that holds a pillar of the headrest. The upper frame has a holder portion that holds the headrest guide. and a plate-shaped pamphlet frame, The holder portion has a cover portion that covers a lower end portion of the pillar held by the headrest guide at a lower end of the holder portion. and, as the holder portion, a first recess extending in the vertical direction is formed in the pamphlet frame in accordance with the outer shape of the headrest guide This solves the problem.

[0007] Since the holder portion of the upper frame has a cover portion that covers the lower end portion of the pillar, it is possible to prevent the lower end portion of the pillar from coming into contact with the back of the occupant or protruding from the seat back. Therefore, it is not necessary to process the lower end portion of the pillar into a hemispherical shape.

[0008] In the above vehicle seat, the lower end of the cover portion is preferably located below the lower end portion of the pillar held by the headrest guide. Since the lower end of the cover portion is located below the lower end of the pillar, the pillar can be more reliably protected.

[0009] In the above vehicle seat, the upper frame of the said pamphlet frame includes a plate-shaped first pan frame and a plate-shaped second pan frame composed of and, as the holder portion, at least one of the first pan frame and the second pan frame theThe first recess is formed, and the holder portion may hold the headrest guide by inserting the headrest guide into the first recess and sandwiching the headrest guide between the first panel frame from the front of the seat back and the second panel frame from the rear of the seat back. By inserting the headrest guide into the first recess forming the holder portion and sandwiching the headrest guide between the first panel frame and the second panel frame, lateral displacement of the headrest guide is prevented and the headrest guide is held more firmly.

[0010] Further, in the above vehicle seat, the upper frame has a second recess extending in the vertical direction according to the outer shape of the headrest guide formed at a position facing the first recess in the other one of the first panel frame and the second panel frame. The holder portion may hold the headrest guide by inserting the headrest guide into the first recess and the second recess. By inserting the headrest guide into the first recess and the second recess forming the holder portion and sandwiching the headrest guide between the first panel frame and the second panel frame, lateral displacement of the headrest guide is prevented and the headrest guide is held more firmly.

[0011] Further, in the above vehicle seat, the first panel frame has a first bulging portion bulging toward the front of the vehicle seat and extending in the width direction of the vehicle seat, and a first flange portion extending from an upper end portion and / or a lower end portion of the first bulging portion, and the first panel frame may have a hat-shaped longitudinal cross section by the first bulging portion and the first flange portion. Since the first panel frame has a hat-shaped longitudinal cross section, the rigidity of the upper frame is improved.

[0012] In addition, in the vehicle seat described above, the second pan frame may have a second bulging portion that bulges toward the rear of the vehicle seat and extends in the width direction of the vehicle seat, and a second flange portion that extends from the upper end portion and / or the lower end portion of the second bulging portion. The second pan frame may have a hat-shaped longitudinal cross section formed by the second bulging portion and the second flange portion. Since the second pan frame has a hat-shaped longitudinal cross section, the rigidity of the upper frame is improved.

[0013] In addition, in the vehicle seat described above, the first pan frame and the second pan frame may be formed of different materials. By forming with materials having different properties, an upper frame that takes advantage of each characteristic can be formed. For example, either one of the first pan frame and the second pan frame can be made lighter or stronger.

[0014] In addition, in the vehicle seat described above, the first pan frame and the second pan frame may be joined by a structural adhesive. By joining with an adhesive, the welding work during assembly can be reduced, and the frame can be assembled more simply.

[0015] In addition, in the vehicle seat described above, the first pan frame may be formed of high-tensile steel. Since the first pan frame is formed of high-tensile steel, a frame that is lighter and stronger than in the case of iron can be formed.

[0016] In addition, in the vehicle seat described above, the second pan frame may be formed of resin or aluminum. By forming the second pan frame of resin or aluminum, a frame that is cheaper or lighter than in the case of iron can be formed.

Advantages of the Invention

[0017] According to the present invention, since the holder portion of the upper frame has a cover portion that covers the lower end portion of the pillar, it is possible to prevent the lower end portion of the pillar from coming into contact with the back of the occupant or protruding from the seat back. Therefore, it is not necessary to process the lower end portion of the pillar into a hemispherical shape. Further, since the lower end of the cover portion is located below the lower end of the pillar, the pillar can be more reliably protected. In addition, by inserting the headrest guide into the first concave portion constituting the holder portion and sandwiching the headrest guide between the first pan frame and the second pan frame, lateral displacement of the headrest guide is prevented, and the headrest guide is held more firmly. In addition, by inserting the headrest guide into the first concave portion and the second concave portion constituting the holder portion and sandwiching the headrest guide between the first pan frame and the second pan frame, lateral displacement of the headrest guide is prevented, and the headrest guide is held more firmly. Further, since the first pan frame has a hat-shaped longitudinal section, the rigidity of the upper frame is improved. Further, since the second pan frame has a hat-shaped longitudinal section, the rigidity of the upper frame is improved. In addition, by forming with materials having different properties combined, an upper frame that makes use of their respective characteristics can be formed. For example, either one of the first pan frame and the second pan frame can be made lighter or stronger. In addition, by joining the first pan frame and the second pan frame with an adhesive, the welding work during assembly can be reduced, and the frame can be assembled more simply. Further, since the first pan frame is formed of high-tensile steel, a frame that is lighter and stronger than in the case of iron can be formed. In addition, by forming the second pan frame of resin or aluminum, a frame that is cheaper or lighter than in the case of iron can be formed.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7A

Figure 7B

Figure 7C

Embodiments for Carrying out the Invention

[0019] Hereinafter, the configuration of the vehicle seat according to an embodiment of the present invention will be described with reference to the drawings. However, the embodiments described below are for facilitating the understanding of the present invention and do not limit the present invention. That is, the present invention can be changed and improved without departing from its gist, and it goes without saying that the present invention includes its equivalents. Also, in the following description, the content regarding the material, shape, and size of the seat component parts is merely one specific example and does not limit the present invention.

[0020] In the following, as an example of the vehicle seat, a vehicle seat mounted on a vehicle will be cited, and its configuration example will be described. However, the present invention is not limited to the vehicle seat mounted on a ground vehicle having wheels such as an automobile or a railway. For example, it can also be applied to seats mounted on aircraft or ships that move other than on the ground.

[0021] In the following description, the "front-rear direction" refers to the front-rear direction of the vehicle seat and coincides with the traveling direction of the vehicle when it is moving. The "seat width direction" refers to the lateral width direction of the vehicle seat and coincides with the left-right direction as seen by the occupant sitting on the vehicle seat. The "up-down direction" refers to the up-down direction of the vehicle seat and coincides with the vertical direction when the vehicle is traveling on a horizontal plane. When simply referring to the "outer side", it means the side closer to the outside in the direction from the center of the vehicle seat unit toward the outside, and when referring to the "inner side", it means the side closer to the center in the direction from the outside of the vehicle seat unit toward the center.

[0022] Regarding the shape, position, posture, etc. of each part of the vehicle seat described below, unless otherwise specified, the description will assume the case where the vehicle seat is in the sitting state described later.

[0023] <Vehicle seat S> The basic configuration of the vehicle seat (hereinafter referred to as vehicle seat S) according to the present embodiment will be described with reference to FIG. 1. FIG. 1 is a perspective view of the vehicle seat S. For the sake of illustration, a part of the vehicle seat S in FIG. 1 is shown with the cushion trim cover T and the pad P removed.

[0024] The vehicle seat S is a seat placed on the vehicle body floor for the vehicle occupant to sit on. In the present embodiment, the vehicle seat S is used as a front seat corresponding to the front seat of the vehicle. However, it is not limited thereto, and the vehicle seat S can also be used as a rear seat, and can also be used as a middle seat in the second row or a rear seat in the third row in a vehicle equipped with three rows of seats in the front-rear direction.

[0025] As shown in FIG. 1, the vehicle seat S mainly includes a seat back 1 that serves as a backrest portion for supporting the back of the seated person, a seat cushion 2 that serves as a seating portion for supporting the buttocks of the seated person, and a headrest 3 disposed above the seat back 1 for supporting the head of the seated person. The seat back 1 and the seat cushion 2 are connected so as to sandwich a reclining mechanism 7 (see FIG. 2). The seat back 1 is rotatable with respect to the seat cushion 2 and is connected so that the angle can be adjusted. The reclining mechanism 7 adjusts the inclination angle of the seat back 1.

[0026] <Seat frame F> As shown in FIG. 2, a seat frame F is provided inside the vehicle seat S. The seat frame F is composed of a seat back frame 10 that forms the skeleton of the seat back 1 and a seat cushion frame 20 that forms the skeleton of the seat cushion 2. First, configurations other than the seat back frame 10, such as the seat cushion frame 20, will be described below, and the details of the seat back frame 10 will be described later.

[0027] <Seat cushion frame 20> The seat cushion frame 20 is formed in a rectangular frame shape, and a cushion side frame 21 is provided on its side portion. It also has a front connecting frame 22 that connects the cushion side frames 21 in the front and a rear connecting frame 23 that connects them in the rear. The front connecting frame 22 and the rear connecting frame 23 at the front and rear of the vehicle seat S are composed of round pipes. Also, a cushion pan frame 24 is provided in front of the front connecting frame 22. Although not shown, a pressure-receiving member that spans the cushion pan frame 24 and the rear connecting frame 23 is attached, and the buttocks of the seated occupant are supported from below by the pressure-receiving member.

[0028] <Headrest 3 and headrest frame 30> The headrest 3 is attached to the upper part of the seat back 1 so as to support the head of the seated person. Inside the headrest 3, a headrest frame 30 that forms the skeleton of the headrest 3 is provided. At both the left and right ends of the headrest frame 30, two headrest pillars 31 (also called headrest stays) that hang down from the lower part of the headrest 3 are provided. The headrest 3 is attached to the seat back frame 10 by inserting the headrest pillar 31 into a headrest guide 17 attached to an upper frame 12 of the seat back frame 10, which will be described later.

[0029] <Pad P and cushion trim cover T> On the outside of the seat back frame 10, the seat cushion frame, and the headrest frame 30, a pad P and a cushion trim cover T (cushion cover) are provided, whereby the seat back 1, the seat cushion 2, and the headrest 3 are configured. The pad P is a urethane base material molded by foam molding using, for example, urethane foam, and the cushion trim cover T is made of a skin material such as cloth, synthetic leather, or genuine leather.

[0030] <Slide rail 4> Also, as shown in FIG. 2, a slide rail 4 is installed at the lower part of the vehicle seat S. By means of this slide rail 4, the vehicle seat S is attached to the vehicle body floor in a state where it can slide in the front-rear direction.

[0031] The slide rail 4 is a device for sliding the vehicle seat S in the front-rear direction and has a known structure (the structure of a general slide rail mechanism). The slide rail 4 has a lower rail fixed to the vehicle body floor and an upper rail that can slide relative to the lower rail. The upper rail is slidable relative to the lower rail fixed to the vehicle body.

[0032] <Reclining mechanism 7> A reclining mechanism 7 is provided between the lower end of the seat back 1 and the rear end of the seat cushion 2. More specifically, the reclining mechanism 7 connects the seat back frame 10 of the seat back 1 and the seat cushion frame 20 of the seat cushion 2. The reclining mechanism 7 enables adjustment of the angle of the seat back 1 (seat back frame 10) with respect to the seat cushion 2 (seat cushion frame 20). By the reclining mechanism 7, the seat back 1 can be locked at a predetermined angle and maintained in an inclined state. Also, by releasing the lock, the seat back 1 can be toppled forward or backward.

[0033] Hereinafter, the seat back frame 10 included in the vehicle seat S of the present embodiment will be described with reference to FIGS. 2 to 7.

[0034] <Seat back frame 10> As shown in FIG. 2, the seat back frame 10 is formed in a rectangular frame shape as a whole, and the seat back frame 10 includes a pair of back side frames 11 arranged on both sides, an upper frame 12, and a lower frame 16. The upper frame 12 is arranged between the pair of back side frames 11 and connects the upper ends of the back side frames 11. The lower frame 16 is arranged between the pair of back side frames 11 and connects the lower ends of the pair of back side frames 11.

[0035] <Headrest guide 17> The headrest guide 17 is a tubular member provided with an insertion port 17a through which the headrest pillar 31 is inserted. An upper part of the headrest guide 17 is provided with a head 17b having an outer diameter larger than the diameter of an opening (upper opening 15a) of a holder part 15 of the upper frame 12 described later. In some cases, a portion of the headrest guide 17 below the head 17b may be referred to as a main body 17c of the headrest guide 17. Thereby, even when the headrest guide 17 is inserted into the holder part 15 of the upper frame 12, it is suppressed from falling off below the upper frame 12. Note that the headrest guide 17 is formed of a high-strength metal member in order to maintain the holding strength of the headrest 3 and suppress rattling. The headrest guide 17 is not limited to being made of metal and may be made of resin.

[0036] <Upper frame 12> The upper frame 12 is composed of a plate-shaped first pan frame 13 and a plate-shaped second pan frame 14. In the upper frame 12, the first pan frame 13 is located on the front side of the seat back 1, and the second pan frame 14 is located on the rear side of the seat back 1 and on the back side of the first pan frame 13.

[0037] As shown in FIGS. 2 to 4 and FIG. 7, the first pan frame 13 sandwiches the headrest guide 17 from the front of the seat back 1, and the second pan frame 14 sandwiches the headrest guide 17 from the rear of the seat back 1, supporting the headrest guide 17. A cylindrical holder portion 15 for holding the headrest guide 17 is formed by the first pan frame 13 and the second pan frame 14. The headrest guide 17 is attached by inserting the headrest guide 17 into the holder portion 15.

[0038] As shown in FIGS. 5 and 6, two first recesses 13c and two second recesses 14c extending in the vertical direction are formed in the first pan frame 13 and the second pan frame 14, respectively, at positions facing each other. The first recess 13c and the second recess 14c are formed in accordance with the outer shape of the main body 17c of the headrest guide 17. By arranging the first recess 13c and the second recess 14c to face each other and joining the first pan frame 13 and the second pan frame 14, a holder portion 15 for holding the headrest guide 17 is formed.

[0039] The holder portion 15 forms a cylindrical space by the first concave portion 13c and the second concave portion 14c, and has openings (upper opening 15a and lower opening 15b) at the top and bottom. In other words, the upper opening 15a of the holder portion 15 is composed of the opening 13d of the first concave portion 13c and the opening 14d of the second concave portion 14c shown in FIG. 5. The headrest guide 17 is attached by being inserted from the upper opening 15a of the holder portion 15. As shown in FIG. 6, the diameter of the upper opening 15a is formed smaller than the diameter of the head 17b of the headrest guide 17. When the headrest guide 17 is inserted, since the head 17b abuts against the periphery of the upper opening 15a of the holder portion 15, it is suppressed from falling off below the upper opening 15a.

[0040] Also, as shown in FIG. 5, the holder portion 15 includes a cover portion 15c at its lower end that covers the lower end of the headrest pillar 31 held by the headrest guide 17. The cover portion 15c is provided so as to cover the lower ends 31a of the pair of headrest pillars 31. The cover portion 15c is composed of the lower end portion of the first concave portion 13c and the lower end portion of the second concave portion 14c.

[0041] As shown in FIG. 5, the lower end of the holder portion 15, more specifically, the lower end of the cover portion 15c, is formed to be located below the position of the lower end 31a of the headrest pillar 31 held by the headrest guide 17.

[0042] Since the lower end 31a of the headrest pillar 31 is covered by the cover portion 15c, the lower end 31a of the headrest pillar 31 does not directly hit the back of the seated person. Therefore, it is not necessary to process the lower end 31a of the headrest pillar 31 into a hemispherical shape, and the cost or labor related to the processing can be eliminated.

[0043] As shown in FIGS. 5 and 6, the first pan frame 13 is formed with a first bulging portion 13a that bulges forward in the vehicle seat S. Further, the first bulging portion 13a is formed along the longitudinal direction of the first pan frame 13 so as to extend in the width direction of the vehicle seat S. At the upper and lower ends of the first bulging portion 13a in the vertical direction, first flange portions 13b extending upward or downward are formed. As shown in FIG. 6, the first flange portion 13b joins with the second flange portion 14b of the second pan frame 14 described later. The first pan frame 13 is formed to have a hat-shaped longitudinal cross section by the first bulging portion 13a and the first flange portion 13b extending vertically. By having a hat-shaped longitudinal cross section, the rigidity of the first pan frame 13 is improved. Note that the hat shape includes a cap shape. In other words, the hat shape includes a case where the first flange portion 13b extending from either one of the upper end and the lower end of the first bulging portion 13a is formed.

[0044] As shown in FIGS. 5 and 6, the second pan frame 14 is formed with a second bulging portion 14a that bulges rearward in the vehicle seat S. The second bulging portion 14a is formed along the longitudinal direction of the second pan frame 14 so as to extend in the width direction of the vehicle seat S. As shown in FIG. 6, the second flange portion 14b joins with the first flange portion 13b of the first pan frame 13. Further, the second pan frame 14 is formed to have a hat-shaped longitudinal cross section by the second bulging portion 14a and the second flange portion 14b extending vertically. Note that the second flange portion 14b may be formed to extend from either one of the upper end and the lower end of the second bulging portion 14a. As shown in FIG. 4, a window portion 14f is formed in the center of the second bulging portion 14a. By forming the window portion 14f, the state of the headrest guide 17 can be visually confirmed and the weight can be reduced.

[0045] Thus, in the present embodiment, both the first pan frame 13 and the second pan frame 14 have a hat-shaped longitudinal cross section, and a closed cross-sectional structure (also referred to as a mochi structure) having a hollow portion is formed by joining both flange portions.

[0046] In this embodiment, the first pan frame 13 is made of iron and is formed by pressing a steel plate. Further, the second pan frame 14 is made of resin. By making the second pan frame 14 of resin, the weight of the upper frame 12 can be reduced. In this way, by forming the first pan frame 13 and the second pan frame 14 from different materials, the upper frame 12 that makes use of the characteristics of each can be formed.

[0047] For example, the first pan frame 13 may be formed of high-tensile steel. Since high-tensile steel has tension even when it is thin, the plate thickness can be made thinner than that of a steel plate, so that weight reduction can be achieved while ensuring rigidity. The second pan frame 14 may be formed of high-tensile steel.

[0048] Further, the second pan frame 14 may be formed of aluminum or an aluminum alloy. Compared with the case of being made of iron, a frame that is inexpensive or lightweight can be formed.

[0049] The first pan frame 13 and the second pan frame 14 are joined by an adhesive. The adhesive is, for example, a structural adhesive, and it is desirable that it be of a high-toughness type or a high-viscosity type. In the case of a high-toughness type of structural adhesive, cracking of the adhesive due to twisting of the frame or the like is suitably suppressed, and the durability of the adhesion can be improved. In the case of a high-viscosity type, sagging during adhesion can be suppressed. As the structural adhesive, there is, for example, one having an epoxy resin as a main component. The first flange portion 13b of the first pan frame 13 and the second flange portion 14b of the second pan frame 14 are adhered. Since joining is performed using a flange portion that spreads out flatly, the adhesive strength can be maintained even with joining by an adhesive. In this way, by forming the first pan frame 13 and the second pan frame 14, the upper frame 12 can be easily assembled while maintaining the rigidity of the upper frame 12. Note that when both the first pan frame 13 and the second pan frame 14 are made of metal, they may be joined by welding.

[0050] Another example of the upper frame 12 will be described. The upper frames 12A and 12B shown in FIGS. 7B and 7C are also members attached to the upper part of the seat back frame 10. The upper frame 12 shown in FIG. 7A was provided with recesses (first recess 13c and second recess 14c) in both the first pan frame 13 and the second pan frame 14. As shown in FIG. 7B, a recess (first recess 13Ac) may be formed only in the first pan frame 13A. In this case, the second pan frame 14A serves as a lid for closing the recess. Also, as shown in FIG. 7C, a recess (second recess 14Bc) may be formed only in the second pan frame 14B, and the first pan frame 13B serves as a lid for closing the second recess 14c.

[0051] As described above, the vehicle seat S of the present embodiment has been described with reference to the drawings. In the present embodiment, the bulging portions (first bulging portion 13a and second bulging portion 14a) are provided in both the first pan frame 13 and the second pan frame 14, but the bulging portion may be formed only in either one of them. Also, in the present embodiment, the flange portions (first flange portion 13b and second flange portion 14b) extend from both the upper end portion and the lower end portion of the bulging portion, but it may be formed to extend only from either one of the upper end portion and the lower end portion.

[0052] Note that, in the present embodiment, the cover portion 15c is formed by the recesses in both the first pan frame 13 and the second pan frame 14. This is an example, and for example, only the first recess 13c of the first pan frame 13 may extend downward to form a cover portion that covers only the front side of the headrest pillar 31.

Description of Reference Numerals

[0053] S Vehicle seat (automobile seat) F Seat frame T Cushion trim cover P Pad 1 Seat back 2 Seat cushion 3 Headrest 4 Slide rail 7 Reclining mechanism 10 Seat back frame 11 Back side frame 12 Upper frame 13 First pan frame 13a First bulging part 13b First flange part 13c First concave part 13d Upper opening 13e Lower opening 14 Second pan frame 14a Second bulging part 14b Second flange part 14c Second concave part 14d Upper opening 14e Lower opening 14f Window part 15 Holder part 15a Upper opening 15b Lower opening 15c Cover part 16 Lower frame 17 Headrest guide 17a Insertion port 17b Head part 17c Main body 20 Seat cushion frame 21 Cushion side frame 22 Front connecting frame 23 Rear connecting frame 24 Cushion pan frame 30 Headrest frame 31 Headrest pillar

Claims

1. A vehicle seat comprising a seat back, a headrest provided on the seat back, and a seat back frame forming the skeleton of the seat back, The seat back frame, has a pair of back side frames, an upper frame connecting the pair of back side frames, and a headrest guide holding the pillar of the headrest, The upper frame, has a holder portion for holding the headrest guide, and a plate-shaped pan frame, The holder portion has a cover portion at the lower end thereof that covers the lower end portion of the pillar held by the headrest guide, The vehicle seat is characterized in that a first recess extending in the vertical direction is formed in the pan frame in accordance with the outer shape of the headrest guide as the holder portion.

2. The vehicle seat according to claim 1, wherein the lower end of the cover portion is located below the lower end portion of the pillar held by the headrest guide.

3. The pan frame of the upper frame is composed of a plate-shaped first pan frame and a plate-shaped second pan frame, As the holder portion, the first recess is formed in at least one of the first pan frame and the second pan frame, The vehicle seat according to claim 1 or 2, wherein the holder portion holds the headrest guide by inserting the headrest guide into the first recess and sandwiching the headrest guide with the first pan frame from the front of the seat back and the second pan frame from the rear of the seat back.

4. The upper frame has a second recess formed at a position facing the first recess and extending vertically along the outer shape of the headrest guide in the other one of the first pan frame and the second pan frame. The holder portion inserts the headrest guide into the first recess and the second recess to hold the headrest guide. The vehicle seat according to claim 3, characterized in that.

5. The first pan frame has a first bulging portion bulging forward of the vehicle seat and extending in the width direction of the vehicle seat, and a first flange portion extending from an upper end portion and / or a lower end portion of the first bulging portion. The first pan frame has a hat-shaped vertical cross section by the first bulging portion and the first flange portion. The vehicle seat according to claim 3 or 4, characterized in that.

6. The second pan frame has a second bulging portion bulging rearward of the vehicle seat and extending in the width direction of the vehicle seat, and a second flange portion extending from an upper end portion and / or a lower end portion of the second bulging portion. The second pan frame has a hat-shaped vertical cross section by the second bulging portion and the second flange portion. The vehicle seat according to any one of claims 3 to 5, characterized in that.

7. The first pan frame and the second pan frame are formed of different materials from each other. The vehicle seat according to any one of claims 3 to 6, characterized in that.

8. The first pan frame and the second pan frame are joined by a structural adhesive. The vehicle seat according to claim 7, characterized in that.

9. The first pan frame is formed of high-tensile steel material. The vehicle seat according to claim 7 or 8, characterized in that.

10. The second pamphlet is formed of resin or aluminum, and the vehicle seat according to any one of claims 7 to 9, characterized in that.

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