Sheet

Abstract

To provide a seat enabling fitting a member such as a wire harness to a planar substrate without giving a seated person a discomfort feeling.SOLUTION: A vehicle seat S comprises a frame-like first seat frame (cushion frame F1), and a planar substrate 30 arranged inside the first seat frame and supporting a seated person. The planar substrate 30 has a seat-like planar part 31 for supporting the seated person, fitting parts 32, 33 fitted to the first seat frame, and an extension part 34 extending from the planar part 31 or the fitting parts 32, 33 and positioned at an opposite side to the seated person relative to the planar part 31. The extension part 34 has a locking part for locking a prescribed member to the planar substrate 30.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a seat having a planar support body that supports a seated occupant. [Background technology]

[0002] Conventionally, there is known a seat that includes a planar support that supports a seat occupant via a pad, and a resin structure that is disposed on the opposite side of the pad with respect to the planar support (see Patent Document 1). In this technology, a wire harness that is disposed in the space below the seat is attached to the resin structure by using a clip. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-104370 A Summary of the Invention [Problem to be solved by the invention]

[0004] By the way, it is conceivable to remove the resin structure from the structure of the conventional technology in order to reduce the number of parts and the size. In this case, it is conceivable to provide a hole for attaching a clip in the sheet support itself and attach the wire harness to the sheet support. However, if the clip protrudes from the sheet support toward the pad, a seat occupant will feel the presence of the clip through the pad or the like, which will cause a problem that the seat occupant will feel uncomfortable.

[0005] Therefore, an object of the present invention is to provide a seat in which a member such as a wire harness can be attached to a planar support body without causing an occupant to feel uncomfortable. [Means for solving the problem]

[0006] In order to solve the above-mentioned problems, the seat according to the present invention includes a frame-shaped first seat frame, and a planar support body that is disposed inside the first seat frame and supports a seated occupant. The planar support body has a sheet-like planar portion that supports the seated occupant, an attachment portion that is attached to the first seat frame, and an extension portion that extends from the planar portion or the attachment portion and is positioned on the opposite side of the planar portion to the seated occupant. The extension portion has a locking portion for locking a predetermined member to the planar support body.

[0007] According to this configuration, the extension portion to which the predetermined member is engaged is located on the opposite side of the planar portion from the seated person, so that the seated person is prevented from feeling the presence of the predetermined member engaged with the extension portion. Therefore, the predetermined member can be attached to the planar support body without causing the seated person to feel uncomfortable.

[0008] The seat may further include a second seat frame rotatably connected to the first seat frame via a reclining mechanism, the first seat frame having a first frame extending in the left-right direction and a second frame extending in the left-right direction and positioned farther from the reclining mechanism than the first frame, and the distance from the extension portion to the first frame may be greater than the distance from the extension portion to the second frame.

[0009] With this configuration, the extension portion is positioned at a position far away from the reclining mechanism, so that, for example, when the second seat frame is rotated relative to the first seat frame, interference between the extension portion and a member provided on the second seat frame can be prevented.

[0010] At least the planar portion and the extending portion may be made of a single sheet-like member, and the extending portion may be formed by folding back an end portion of the sheet-like member.

[0011] According to this configuration, the extension portion can be easily configured.

[0012] In addition, the extension portion may have a tubular portion formed by folding the sheet-like member into a cylindrical shape, and a reinforcing member disposed within the tubular portion, the reinforcing member being harder than the sheet-like member.

[0013] According to this configuration, since the extension portion has a reinforcing member having higher rigidity than the sheet-like member, the strength of the portion to which the specified member is attached can be increased.

[0014] The reinforcing member may have a locking hole as the locking portion, and the tubular portion may have an exposure hole that exposes the locking hole to the outside.

[0015] According to this configuration, a member such as a clip for attaching a predetermined member can be satisfactorily engaged with the locking hole of the reinforcing member.

[0016] The extension portion may extend from the attachment portion.

[0017] According to this configuration, the load applied to the extension portion from the specified member is unlikely to be transmitted to the planar portion, so that the planar portion can provide good support for the seated occupant.

[0018] The first seat frame may have an attachment hook for attaching the attachment portion, and the attachment portion may have an engagement member that engages with the attachment hook.

[0019] With this configuration, the mounting portion can be attached to the first seat frame favorably.

[0020] In addition, the extension portion may be made of a plate-shaped resin member, and the engagement portion may have a hole formed in the extension portion, a band-shaped portion extending from a part of the contour of the extension portion, and a hook portion provided at an end of the band-shaped portion and engaging with the hole.

[0021] According to this configuration, when the hook portion at the end of the band-shaped portion is engaged with the hole, the band-shaped portion becomes cylindrical, so that a specified member can be held by the cylindrical band-shaped portion, eliminating the need for a member for attaching the specified member, such as a clip.

[0022] The predetermined member may be a wire harness that transmits power or signals to an electrical component.

[0023] The first seat frame may be a cushion frame. Effect of the Invention

[0024] According to the present invention, a predetermined member such as a wire harness can be attached to the planar support body without causing an uncomfortable feeling to a seated occupant.

[0025] In addition, by positioning the extension portion at a position far away from the reclining mechanism, it is possible to prevent a member provided on the second seat frame from interfering with the extension portion, for example, when the second seat frame is rotated relative to the first seat frame.

[0026] Furthermore, by forming the extension portion by folding back the end portion of the sheet-like member, the extension portion can be easily configured.

[0027] Furthermore, by configuring the extension portion by a cylindrical portion and a reinforcing member disposed within the cylindrical portion, the strength of the portion to which the specified member is attached can be increased.

[0028] Furthermore, by forming a locking hole in the reinforcing member, a member such as a clip for attaching a predetermined member can be satisfactorily engaged with the locking hole of the reinforcing member.

[0029] Furthermore, by extending the extension portion from the mounting portion, the load applied to the extension portion from a specific member is less likely to be transmitted to the planar portion, so that the planar portion can provide good support for the seated occupant.

[0030] Furthermore, by configuring the mounting portion to have an engaging member that engages with the mounting hook of the first seat frame, the mounting portion can be attached to the first seat frame favorably.

[0031] Furthermore, by configuring the extension portion to have a hole formed in the extension portion, a band-shaped portion extending from part of the contour of the extension portion, and a hook portion provided at the tip of the band-shaped portion and engaging with the hole, a specified member can be held by the tubular band-shaped portion, eliminating the need for a member for attaching the specified member, such as a clip. [Brief description of the drawings]

[0032] [Figure 1] FIG. 1 is a perspective view showing a seat according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing a seat frame that constitutes a seat. [Diagram 3] 1A is a perspective view of the planar support as viewed obliquely from above and below the front, and FIG. [Figure 4] 1A is a side view of the planar support body, FIG. 1B is an enlarged cross-sectional view showing the structure around the first mounting portion, and FIG. 1C is an enlarged cross-sectional view showing the structure around the second mounting portion. [Diagram 5] 1A is a perspective view showing the relationship between the extension portion and a clip, etc., and FIG. 1B is an exploded perspective view showing the extension portion. [Figure 6] FIG. 2A is a plan view showing each portion of the planar portion, and FIGS. 2B to 2D are diagrams showing the difference in warp density in each portion. [Figure 7] 7A is a diagram showing a modified example of the extension portion and the mounting portion, FIG. 7B is an oblique view showing the extension portion of FIG. 7A, and FIG. 7C is an oblique view showing the state in which the hook portion of the extension portion is engaged with the hole. [Figure 8] FIG. 11 is a perspective view showing a first modified example of the wrinkle suppressing member. [Figure 9] FIG. 11 is a perspective view showing a second modified example of the wrinkle suppressing member. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0033] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In this specification, the terms front, back, left, right, top and bottom are based on the front, back, left, right, top and bottom as seen by a person sitting in the seat. As shown in FIG. 1, the seat of this embodiment is configured as a vehicle seat S to be installed in an automobile, and includes a seat cushion S1, a seat back S2, and a headrest S3.

[0034] The seat cushion S1 is constructed by covering a cushion frame F1, which is an example of a first seat frame, with a pad made of urethane foam or the like and a skin material made of fabric, leather, or the like, as shown in Fig. 2. The seat back S2 is constructed by covering a back frame F2, which is an example of a second seat frame, with a pad and a skin material, as shown in Fig. 2. Although not shown, the headrest S3 is also constructed by covering a headrest frame with a pad and a skin material.

[0035] The cushion frame F1 is installed on the floor of the vehicle via slide rails SL, which allows the front-rear position of the vehicle seat S to be adjusted. The lower portion of the back frame F2 is rotatably connected to the rear part of the cushion frame F1 via a reclining mechanism RL.

[0036] The back frame F2 is mainly composed of an upper frame 21, left and right seatback side frames 22, and a lower frame 23, and is formed into a frame-like shape in which the upper frame 21, the left and right seatback side frames 22, and the lower frame 23 are joined together by welding or the like.

[0037] The upper frame 21 is made of a pipe material bent into a substantially U-shape, and a pair of left and right support brackets 21B for mounting a headrest S3 are fixed by welding to the front side of a horizontal pipe section 21A extending in the left-right direction. In addition, left and right vertical pipe sections 21C extending in the up-down direction of the upper frame 21 are integrated with left and right plate-shaped side frame main body sections 22A joined to their lower parts to form left and right seatback side frames 22.

[0038] The cushion frame F1 is mainly composed of left and right cushion side frames 11, a pan frame 12 as an example of a second frame, and a rear connecting pipe 13 as an example of a first frame, and is formed into a frame shape in which the left and right cushion side frames 11, the pan frame 12, and the rear connecting pipe 13 are integrally joined by welding, etc. A planar support body 30 that supports a seated person via a pad is disposed inside this frame-like cushion frame F1.

[0039] The pan frame 12 is a plate-like member extending in the front-rear and left-right directions. The pan frame 12 is disposed at a position farther from the reclining mechanism RL than the rear connecting pipe 13. The pan frame 12 has an attachment hook 12A at its rear end. The attachment hook 12A is a hook for attaching the front end of the planar support body 30. A plurality of attachment hooks 12A are provided at intervals in the left-right direction. The attachment hooks 12A are formed integrally with the pan frame 12 by cutting and raising a part of the plate-like pan frame 12.

[0040] The rear connecting pipe 13 is a cylindrical member extending in the left-right direction. The rear connecting pipe 13 has an attachment hook 13A for attaching the rear end of the planar support body 30. The attachment hook 13A is formed by bending a metal plate, and is joined to the rear connecting pipe 13 by welding or the like. A plurality of attachment hooks 13A are provided at intervals in the left-right direction.

[0041] 3(a) and (b), the planar support 30 has a sheet-like planar portion 31 that supports a seated occupant, a first attachment portion 32 and a second attachment portion 33 that are attached to the cushion frame F1, and an extension portion 34 that extends from the first attachment portion 32 and is located on the opposite side of the planar portion 31 from the seated occupant. The planar portion 31 is formed from a part of a single sheet-like member 30S. In this embodiment, the sheet-like member 30S is a cloth.

[0042] The first attachment portion 32 is disposed at the front end of the planar portion 31. The first attachment portion 32 has a wire 32A as an example of an engagement member, and a holding portion 32B that holds the wire 32A. The wire 32A is made of, for example, a metal, and has higher rigidity than the sheet-like member 30S.

[0043] The holding portion 32B is formed into a cylindrical shape by folding back a portion of the sheet-like member 30S and sewing it with thread ST. The wire 32A is inserted into the holding portion 32B and is held by the holding portion 32B. The holding portion 32B is formed with a notch 32C that exposes the wire 32A. A plurality of notches 32C are provided at intervals in the left-right direction. The portion of the wire 32A exposed from the notch 32C is engageable with the mounting hook 12A of the pan frame 12, as shown in FIG. 4(b).

[0044] As shown in Fig. 3(a), the second mounting portion 33 is disposed at the rear end of the planar portion 31. The second mounting portion 33 has a structure similar to that of the first mounting portion 32. Specifically, the second mounting portion 33 has a wire 33A and a cylindrical holding portion 33B having a plurality of notches 33C. As shown in Fig. 4(c), the portion of the wire 33A exposed from the notches 33C is engageable with a mounting hook 13A joined to the rear connecting pipe 13.

[0045] 4(b), the extension portion 34 is provided so as to hang down from the front first mounting portion 32. By providing the extension portion 34 on the front first mounting portion 32 in this manner, the distance from the extension portion 34 to the rear connecting pipe 13 is greater than the distance from the extension portion 34 to the pan frame 12.

[0046] The extension portion 34 has a cylindrical portion 34A and a reinforcing member 34B disposed within the cylindrical portion 34A. The cylindrical portion 34A is formed into a cylindrical shape by folding back the front end portion of the sheet-like member 30S and sewing it with thread ST. In detail, the front end portion of the sheet-like member 30S is sandwiched between the ends of a C-shaped portion in cross section of the sheet-like member 30S that forms the holding portion 32B, and is sewn together with the ends with thread ST to form the cylindrical portion 34A and the holding portion 32B.

[0047] The reinforcing member 34B is a member having higher rigidity than the sheet-like member 30S, and is made of, for example, a resin plate. As shown in Fig. 5(b), the reinforcing member 34B is a plate-like member and has locking holes H1 as locking portions. The locking holes H1 are through holes that penetrate the reinforcing member 34B, and two of them are provided with a gap between them in the left-right direction.

[0048] The cylindrical portion 34A has an exposure hole H2 that exposes the locking hole H1 to the outside. The exposure hole H2 has a first exposure hole H21 that exposes one opening of the locking hole H1 to the outside, and a second exposure hole H22 that exposes the other opening of the locking hole H1 to the outside. As shown in FIG. 5(a), the reinforcing member 34B is fixed to the cylindrical portion 34A by sewing with thread ST. A wire harness WH that transmits power or signals to an electrical component is engaged with the locking hole H1 of the reinforcing member 34B by a clip CP (see also FIG. 4(b)).

[0049] 6(a) to 6(d), the sheet-like member 30S has a plurality of warp threads T1 extending in a front-rear direction as a first direction, and a plurality of weft threads T2 extending in a left-right direction as a second direction perpendicular to the first direction. The warp threads T1 are thicker than the weft threads T2 and are configured to be easily elastically deformed. Specifically, for example, the warp threads T1 are made of elastomer, and the weft threads T2 are made of polyester.

[0050] The planar portion 31 has a first portion 31A, a second portion 31B, a third portion 31C, and a fourth portion 31D, which have different warp densities, which are the number of warp threads T1 per unit length UL in the left-right direction. The first portion 31A is located at both left and right ends of the planar portion 31. As shown in FIG. 6(b), the first portion 31A has a first density, which is the highest warp density. The pitch of the multiple warp threads T1 that make up the first portion 31A is approximately constant.

[0051] The second portion 31B is provided at a position corresponding to each of the left and right ischia of a seated person. As shown in Fig. 6(c), the second portion 31B has a second warp density lower than the first density. The pitch of the multiple warp threads T1 constituting the second portion 31B is substantially constant.

[0052] The third region 31C is provided between the left first region 31A and the left second region 31B, and between the right first region 31A and the right second region 31B. The warp density of the third region 31C is lower than the first density and higher than the second density. The pitch of the multiple warp threads T1 constituting the third region 31C gradually increases from the first region 31A to the second region 31B.

[0053] The fourth region 31D is provided between the left and right second regions 31B. The fourth region 31D has a warp density lower than the first density and higher than the second density. The pitch of the multiple warp threads T1 constituting the fourth region 31D gradually increases from the left and right ends toward the center, for example.

[0054] 3(a) and (b), wrinkle suppressing member 35 is provided on planar portion 31 to suppress wrinkles caused by shrinkage of planar portion 31 in the left-right direction. Wrinkle suppressing member 35 includes first wrinkle suppressing member 35A located at the front end of planar portion 31 and second wrinkle suppressing member 35B located at the rear end of planar portion 31. First wrinkle suppressing member 35A and second wrinkle suppressing member 35B are each a member having higher rigidity than planar portion 31, and are made of, for example, a resin plate.

[0055] First wrinkle suppression member 35A and second wrinkle suppression member 35B are each long plate-like members extending from one end to the other end in the left-right direction of planar portion 31, and are fixed by being entirely sewn to planar portion 31 with thread ST. In this way, first wrinkle suppression member 35A and second wrinkle suppression member 35B restrain the entire planar portion 31 so as to prevent planar portion 31 from shrinking in the second direction. Note that, in order to prevent planar portion 31 from shrinking in the second direction, only the left-right ends of first wrinkle suppression member 35A and second wrinkle suppression member 35B may be sewn to planar portion 31 to restrain one end and the other end in the left-right direction of planar portion 31. Furthermore, when providing the wrinkle suppression member on the planar support, in this embodiment the wrinkle suppression member is sewn to the planar support, but the wrinkle suppression member may also be integrally molded on the planar support by injection molding by impregnating the planar support with resin.

[0056] As described above, the following effects can be obtained in this embodiment. Since the extension portion 34 to which the wire harness WH is engaged is located on the opposite side of the seated occupant with respect to the planar portion 31, it is possible to prevent the seated occupant from feeling the presence of the wire harness WH and the clip CP engaged with the extension portion 34. Therefore, the wire harness WH can be attached to the planar support body 30 without causing the seated occupant to feel uncomfortable.

[0057] Since the extension portion 34 is positioned at a position far away from the reclining mechanism RL, it is possible to prevent members provided on the back frame F2 from interfering with the extension portion 34 when the back frame F2 is rotated relative to the cushion frame F1.

[0058] Since the extension portion 34 is formed by folding back an end portion of the sheet-like member 30S that constitutes the planar portion 31, the extension portion 34 can be easily formed.

[0059] Since the extension 34 has the reinforcing member 34B having higher rigidity than the sheet-like member 30S, the strength of the portion to which the wire harness WH is attached can be increased.

[0060] Since the cylindrical portion 34A has the exposure hole H2 that exposes the locking hole H1 of the reinforcing member 34B to the outside, the clip CP can be satisfactorily engaged with the locking hole H1 of the reinforcing member 34B.

[0061] Since the extension portion 34 extends from the first mounting portion 32, the load applied to the extension portion 34 from the wire harness WH is less likely to be transmitted to the planar portion 31, so that the planar portion 31 can provide good support for the seated occupant.

[0062] Since the mounting portions 32, 33 have the wires 32A, 33A that engage with the mounting hooks 12A, 13A, the mounting portions 32, 33 can be attached to the cushion frame F1 in a good condition.

[0063] By providing the wrinkle suppression member 35, which has a higher rigidity than the planar portion 31, on the planar portion 31, shrinkage of the planar portion 31 in the second direction and the formation of wrinkles are suppressed, and therefore the positions of each portion with a different warp density, particularly the second portion 31B supporting the ischial bones of a seated person, can be suppressed from shifting from the desired position.

[0064] The wrinkle suppression member may extend in the second direction and restrain at least one end and the other end of the planar portion in the second direction.

[0065] Since the wrinkle suppression members 35 extending in the left-right direction restrict the planar portion 31 from shrinking in the left-right direction, it is possible to suppress the planar portion 31 from shrinking in the left-right direction and causing wrinkles.

[0066] The two wrinkle suppression members 35A, 35B can suppress the front and rear ends of the planar portion 31 from shrinking in the left-right direction, thereby suppressing the entire planar portion 31 from shrinking in the left-right direction and causing wrinkles.

[0067] The present invention is not limited to the above-described embodiment, but can be used in various forms as exemplified below. In the following description, the same reference numerals are used to designate components having substantially the same structures as those in the above-described embodiment, and the description thereof will be omitted.

[0068] In the above embodiment, the extension portion 34 is configured to extend from the first attachment portion 32, but the present invention is not limited to this, and for example, as shown in Fig. 7(a), the extension portion 36 may extend from the planar portion 31. Specifically, in this embodiment, the extension portion 36 is made of a plate-shaped resin member and is fixed to the planar portion 31 by sewing with thread ST. Note that, when providing the extension portion on the planar support, although the extension portion is sewn to the planar support in this embodiment, the extension portion may alternatively be integrally molded with the planar support by injection molding in which the planar support is impregnated with resin.

[0069] 7(b) and (c), the extending portion 36 has a locking portion 361 for directly locking the wire harness WH. The locking portion 361 has a hole H3 formed in the extending portion 36, a strip-shaped portion 361A extending from a part of the contour of the extending portion 36, and a hook portion 361B provided at the tip of the strip-shaped portion 361A and engaging with the hole H3.

[0070] According to this embodiment, when the hook portion 361B at the tip of the band-shaped portion 361A is engaged with the hole H3, the band-shaped portion 361A becomes cylindrical, so that the wire harness WH can be held by the cylindrical band-shaped portion 361A. Therefore, in this embodiment, the clip CP as in the above embodiment is not required.

[0071] The structure of the mounting portion is not limited to the above embodiment. For example, as shown in FIG. 7(a), the first mounting portion 37 located at the front end of the planar portion 31 may be a hook-shaped resin member that engages with the mounting hook 12A of the pan frame 12. The second mounting portion 38 located at the rear end of the planar portion 31 may be composed of two hooks 38A, 38B and a connecting portion 38C that connects the two hooks 38A, 38B. The connecting portion 38C is a part of the sheet-like member 30S, and the hooks 38A, 38B are fixed to each end in the front-rear direction. The second mounting portion 38 is attached to the rear connecting pipe 13 by engaging the hooks 38A, 38B with the connecting portion 38C wrapped around the rear connecting pipe 13.

[0072] The extension and the attachment may have various other structures. For example, the extension may have a structure in which the reinforcing member 34B is removed from the structure in Fig. 5(b). In this case, an attachment member for attaching a wire harness WH or the like may be engaged with the exposure hole H2 formed in the cylindrical portion 34A of the extension 34. The attachment may also be a hole formed in the sheet-like member that engages with an attachment hook.

[0073] In the above embodiment, the sheet-like member 30S is a cloth, but the present invention is not limited to this, and the sheet-like member may be a thin sheet-like member that can be deformed to conform to the member (e.g., a pad) to be pressed. For example, the sheet-like member may be a thin plastic sheet.

[0074] In the above embodiment, the predetermined member that is engaged with the extension portion is the wire harness WH. However, the predetermined member may be, for example, an operating wire for operating a reclining mechanism or the like.

[0075] 8, first wrinkle suppressing member 135A and second wrinkle suppressing member 135B may each be a bar-shaped member, for example a metal rod. In this case, left and right ends of planar portion 31 may be provided with folded-back portions 311 that are folded back onto the underside of planar portion 31, and first wrinkle suppressing member 135A may restrict inward movement of left and right folded-back portions 311 in the left-right direction. Specifically, a bag-shaped portion may be formed by sewing front and rear ends of left and right folded-back portions 311 to planar portion 31, and both ends of first wrinkle suppressing member 135A may be inserted into this bag-shaped portion.

[0076] Furthermore, a sheet-like holding member 312 for holding first wrinkle suppressing member 135A may be provided in the center in the left-right direction of planar portion 31. Specifically, a cylindrical portion is formed by sewing front and rear ends of sheet-like holding member 312 to planar portion 31, and first wrinkle suppressing member 135A is placed inside this cylindrical portion.

[0077] 9, the wrinkle suppressing member 235 may have a first rod-shaped portion 235A and a second rod-shaped portion 235B extending in the front-rear direction and disposed at both ends of the planar portion 31 in the left-right direction. Specifically, the first rod-shaped portion 235A is integrally formed with one end of the wire 32A in the left-right direction, and the second rod-shaped portion 235B is integrally formed with the other end of the wire 32A in the left-right direction. The front ends of the first rod-shaped portion 235A and the second rod-shaped portion 235B are supported by the pan frame 12 via the wire 32A. The rear ends of the first rod-shaped portion 235A and the second rod-shaped portion 235B are supported by a locking piece 13B joined to the rear connecting pipe 13.

[0078] The left and right ends of the sheet-like portion 31 are provided with the folded portions 311 as described above. The left and right folded portions 311 are sewn to the sheet-like portion 31 while being wrapped around the first rod-shaped portion 235A or the second rod-shaped portion 235B. In this embodiment, the left and right folded portions 311 are disposed on the front side of the sheet-like portion 31. Therefore, the wrinkle suppressing member 235 restrains the front portion of the sheet-like portion 31. When the folded portions 311 are formed from the front end to the rear end of the sheet-like portion 31, the wrinkle suppressing member 235 restrains the entire sheet-like portion 31.

[0079] In the above embodiment, the seat is exemplified as a vehicle seat S used in an automobile, but the present invention is not limited to this, and may be a seat for other vehicles, for example, a seat used in a ship, an airplane, etc. Furthermore, the seat is not limited to a vehicle seat, and may be, for example, a seat chair, furniture, an outdoor chair, etc.

[0080] In the above embodiment, the first seat frame is a cushion frame F1 and the second seat frame is a back frame F2, but the present invention is not limited to this, and the first seat frame may be a back frame and the second seat frame may be a cushion frame.

[0081] In the above embodiment, the number of warp threads is different in each part of the planar portion, but the present invention is not limited to this, and each part of the planar portion may have different hardness, for example, the thickness of the warp threads in each part of the planar portion may be different, or the material of the warp threads in each part of the planar portion may be different. In other words, the planar portion may have a first part and a second part in which at least one of the number, thickness, and material of the warp threads is different from that in the first part.

[0082] The elements described in the above-mentioned embodiment and modified examples may be implemented in any combination. [Explanation of symbols]

[0083] 30 Planar support 31 Planar part 32 First mounting part 33 Second mounting part 34 Extension 34A Cylindrical part 34B Reinforcement member F1 Cushion Frame H1 Locking hole S Vehicle seat WH Wire harness

Claims

1. A frame-shaped first seat frame; A planar support member disposed inside the first seat frame and supporting a seated occupant, The planar support is A sheet-like surface portion that supports a seated occupant; a mounting portion that is attached to the first seat frame; an extension portion extending from the planar portion or the mounting portion and positioned on an opposite side of the planar portion from the seated occupant, the extension portion has a locking portion for locking a predetermined member to the planar support body, At least the planar portion and the extending portion are made of a single sheet-like member, The sheet, wherein the extension portion is formed by folding back an end portion of the sheet-like member.

2. a second seat frame rotatably connected to the first seat frame via a reclining mechanism, The first seat frame includes: A first frame extending in the left-right direction; a second frame extending in a left-right direction and disposed at a position farther from the reclining mechanism than the first frame, The seat according to claim 1 , wherein a distance from the extension to the first frame is greater than a distance from the extension to the second frame.

3. The extension portion is a cylindrical portion formed by folding the sheet-like member; and 3. The sheet according to claim 1, further comprising a reinforcing member disposed within the tubular portion, the reinforcing member being harder than the sheet-like member.

4. The reinforcing member has a locking hole as the locking portion, The seat according to claim 3 , wherein the cylindrical portion has an exposure hole for exposing the engagement hole to the outside.

5. The seat according to any one of claims 1 to 4, wherein the extension portion extends from the attachment portion.

6. the first seat frame has a mounting hook for mounting the mounting portion, 6. The seat according to claim 1, wherein the mounting portion has an engagement member that engages with the mounting hook.

7. 7. The seat according to claim 1, wherein the predetermined member is a wire harness that transmits electric power or a signal to an electrical component.

8. 8. The seat according to claim 1, wherein the first seat frame is a cushion frame.

9. A pad and a skin material that are placed on the first seat frame; a reclining mechanism that rotatably connects a second seat frame to the first seat frame; The seat according to any one of claims 1 to 8, further comprising a slide rail for adjusting the front-rear position of the seat.

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