Seat back

Abstract

To provide a seat back in which generation of a wrinkle in a pocket formed on a back surface is suppressed.SOLUTION: A seat back of the present disclosure includes: a seat back frame; a pad assembled to the seat back frame and covering at least a front surface side of the seat back frame; and a skin covering an outer periphery of the seat back frame assembled with the pad, and including a front surface side skin covering a front surface side of the seat back frame, and a back surface side skin covering a back surface side of the seat back frame. The back surface side skin includes: a back surface side skin body; a pocket part formed by overlapping another skin on a surface of the back surface side skin body; and a pair of back surface side coated cloths attached to both end portions in a width direction of the back surface side skin body, for fixing the back surface side skin body, the pair of back surface side coated cloths having an angle formed by the pair of back surface side coated cloths and the back surface side skin body in an attachment state of the back surface side skin is equal to or more than 90 degrees.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a seat back.

Background Art

[0002] Patent Document 1 below describes a structure in which a pocket-shaped storage portion is formed by overlapping another skin on the surface of the skin covering the back surface of the seat back of a vehicle seat.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a seat back having a pocket provided on its back surface, wrinkles may occur particularly at the left and right ends of the opening of the pocket. The occurrence of such wrinkles is considered to be one of the factors causing a decrease in the lateral tension acting on the skin forming the pocket. Therefore, in order to prevent the above-described wrinkles, it is important to adjust the tension acting on the skin forming the pocket to an appropriate range.

[0005] In view of the above points, an object of the present disclosure is to provide a seat back in which wrinkles are suppressed from occurring in a pocket formed on the back surface.

Means for Solving the Problems

[0006] To achieve the above object, a seatback according to a first aspect of the present disclosure includes a seatback frame, a pad assembled to the seatback frame and covering at least the front side of the seatback frame, and a skin that covers the outer periphery of the seatback frame to which the pad is assembled, and includes a front-side skin that covers the front side of the seatback frame and a rear-side skin that covers the rear side of the seatback frame. The rear-side skin includes a rear-side skin main body, a pocket portion formed by overlapping another skin on the surface of the rear-side skin main body, and a pair of rear-side pull straps attached to both ends in the width direction of the rear-side skin main body for fixing the rear-side skin main body, wherein an angle formed by the pair of rear-side pull straps and the rear-side skin main body in the attached state of the rear-side skin is 90 degrees or more.

[0007] In such a seatback, when the rear-side skin is attached, it is possible to prevent a component acting along the rear-side pull strap from being included in the direction toward the central portion in the width direction of the seatback. Thereby, it is possible to suppress a decrease in the tension in the width direction of the rear-side skin unintentionally, and prevent wrinkles from occurring in the pocket portion due to the decrease in the tension.

[0008] A seatback according to a second aspect of the present disclosure is the seatback according to the first aspect of the present disclosure, wherein the pad includes a central pad that supports the waist of a seated occupant and a pair of side pads disposed at both ends in the width direction of the central pad. The front-side skin includes a front-side skin main body that covers the surface of the central pad and a pair of front-side pull straps attached to both ends in the width direction of the front-side skin main body and extending from both ends in the width direction of the central pad to the rear side of the seatback frame. The pair of rear-side pull straps are respectively attached to the pair of front-side pull straps.

[0009] In such a seatback, the rear-side skin and the front-side skin can be simultaneously fixed to the seatback frame to which the pad is assembled.

[0010] The seat back according to the third aspect of the present disclosure is the seat back according to the second aspect of the present disclosure, wherein the length in the width direction of the back-side skin body is equal to or less than the length in the width direction of the front-side skin body.

[0011] In such a seat back, it is possible to easily make the angle formed by the pair of back-side draw cloths and the back-side skin body 90 degrees or more.

[0012] The seat back according to the fourth aspect of the present disclosure is the seat back according to any one of the first to third aspects of the present disclosure, wherein the pad includes a central pad that supports the waist of the seated occupant and a pair of side pads disposed at both ends in the width direction of the central pad, and a slit is formed at a position where the central pad and the pair of side pads are adjacent to each other.

[0013] In such a seat back, the pair of side pads do not operate following the operation of the central pad, and deformation of the pair of side pads can be suppressed.

Advantages of the Invention

[0014] According to the seat back described above, it is possible to suppress the occurrence of wrinkles in the pocket formed on the back of the seat back.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0016] Hereinafter, each embodiment for implementing the present disclosure will be described with reference to the drawings. In the following, the scope necessary for the description to achieve the object of the present disclosure is schematically shown, and the scope necessary for the description of the corresponding part of the present disclosure will be mainly described, and the parts omitted from the description are assumed to be based on known techniques. In the drawings, some reference numerals may be omitted for ease of viewing the drawings.

[0017] FIG. 1 is a perspective view of an example of a seat back according to an embodiment of the present disclosure as viewed from one direction. FIG. 2 is a perspective view of the seat back shown in FIG. 1 as viewed from a different direction. Further, FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1. The seat back 1 according to the present embodiment can be used, for example, as a part of a vehicle seat mounted in front of a vehicle. This seat back 1 supports the back of a seated occupant sitting on the vehicle seat. In FIGS. 1 and 2, the arrow FR indicates the front side of the seat back 1, the arrow UP indicates the upper side of the seat back 1, and the arrow W indicates the width direction of the seat back 1. Here, the right hand side when a seated occupant is seated on the vehicle seat including the seat back 1 is defined as the "right side of the seat", and the left hand side is defined as the "left side of the seat".

[0018] As shown in FIGS. 1 to 3, the seat back 1 according to the present embodiment includes at least a metal seat back frame 10, a pad 20 assembled to the seat back frame 10 and covering at least the front side of the seat back frame 10, and a skin 30 covering the outer periphery of the seat back frame 10 to which the pad 20 is assembled. Further, at the upper center of the seat back 1, a headrest fixing portion 2 for attaching a headrest (not shown) is provided.

[0019] The seatback frame 10 is a member that constitutes the framework of the seatback 1, and can be formed, for example, by a single or combined bent metal plate or metal pipe. As the seatback frame 10 of the present embodiment, for example, it can be composed of a pair of side frames extending in the vertical direction provided at both ends in the width direction of the seatback 1, and an upper frame mainly extending along the width direction of the seatback 1 so as to connect the upper ends of the pair of side frames. Further, a lumbar support 11 for supporting the waist of the seated occupant may be disposed in the space between the pair of side frames described above. Furthermore, the lower ends of the pair of side frames can be fixed to a frame on the seat cushion side (not shown) of the vehicle seat via a reclining device or the like (also not shown). Note that since well-known conventional structures can be appropriately adopted for the specific structures of the seatback frame 10 and the lumbar support 11, detailed descriptions thereof are omitted here.

[0020] The pad 20 supports the back of the seated occupant and can be composed of a foaming agent such as urethane molded into a predetermined shape. The pad 20 may include a central pad 21 that mainly supports the waist of the seated occupant, and a pair of side pads 22L and 22R disposed at both ends in the width direction of the central pad 21. In addition, the pad 20 may include an upper pad 23 that mainly supports the shoulders of the seated occupant. The upper pad 23 may be integrally molded on the upper part of the central pad 21 and the upper parts of the pair of side pads 22L and 22R. Further, the pad 20 of the present embodiment is assembled to the seatback frame 10 by attaching the side pads 22L and 22R and the upper pad 23 so as to partially cover the periphery of the seatback frame 10.

[0021] Slits 24L and 24R are respectively formed between the adjacent central pad 21 and the pair of side pads 22L and 22R. By providing the slits 24L and 24R, the central pad 21 and the side pads 22L and 22R can operate substantially independently.

[0022] The skin 30 (sometimes referred to as the "trim cover") is a member that constitutes the design surface of the seat back 1, and covers the outer periphery (excluding a lower part) of the seat back frame 10 to which the pad 20 is assembled. This skin 30 can be made of fabric, leather, or the like.

[0023] The skin 30 includes a front-side skin 31 that covers at least the front side of the seat back 1, and a back-side skin 33 that covers the back of the seat back 1. In addition, the skin 30 of the present embodiment includes, in addition to the front-side skin 31 and the back-side skin 33 described above, a pair of side-side skins 32L and 32R that cover the left and right side surfaces of the seat back 1 and a part of the front and back adjacent to the side surfaces.

[0024] The front-side skin 31 includes a front-side skin main body 31A that covers at least the front of the central pad 21. The front-side skin main body 31A of the present embodiment covers the front of the upper pad 23 in addition to the front of the central pad 21. Both ends in the width direction of the portion of the front-side skin main body 31A that covers the front of the central pad 21 are inserted into the slits 24L and 24R. In addition, the edge of the portion of the front-side skin main body 31A that covers the front of the upper pad 23 is attached to the upper part of the back-side skin 33 and the upper parts of the side-side skins 32L and 32R, for example, by sewing.

[0025] In addition, strip-shaped front-side draw cloths 34L and 34R that are long in the vertical direction may be attached, for example, by sewing, to the ends inserted into the slits 24L and 24R of the front-side skin main body 31A. The front-side draw cloths 34L and 34R are used to fix the front-side skin 31 to the seat back frame 10 to which the pad 20 is assembled. However, an example of the detailed fixing structure will be described later.

[0026] The back-side skin 33 includes a pocket portion 36 defined by a back-side skin main body 33A and a pocket-forming skin 35 that is mainly installed so as to at least partially overlap the back-side skin main body 33A and the surface of the back-side skin main body 33A.

[0027] The backside skin body 33A covers the central portion in the width direction on the back of the seat back frame 10 to which the pad 20 is assembled. The upper part of this backside skin body 33A is attached to the front side skin body 31A by sewing or the like. Further, a belt-like body 38 that covers the connecting portion between the seat back 1 and the seat cushion may be connected to the lower part of this backside skin body 33A by being fixed to the seat cushion side.

[0028] Also, the skin for pocket formation 35 may have substantially the same length in the width direction as the backside skin body 33A. Therefore, the widthwise length of the opening of the pocket portion 36 formed by the backside skin body 33A and the skin for pocket formation 35 can be the same as the entire length of the widthwise length of the backside skin body 33A. In the present embodiment, the case where one pocket portion 36 is provided by adding the skin for pocket formation 35 to the surface of the backside skin body 33A is illustrated. However, a plurality of skins for pocket formation may be added to define a plurality of pocket portions. Further, in the present embodiment, the pocket portion 36 is formed by the method of overlapping the skin for pocket formation 35 on the surface of the backside skin body 33A. However, a storage space may be formed by attaching another fabric or the like different from the skin inside the pocket.

[0029] In addition, at both ends in the width direction of the backside skin body 33A, backside pulling fabrics 37L and 37R for fixing at least the backside skin body 33A are attached by sewing or the like. These backside pulling fabrics 37L and 37R can be constituted by strip-shaped fabrics that are long in the vertical direction, similar to the front side pulling fabrics 34L and 34R. The backside skin body 33A is fixed in a state of covering the back of the seat back 1 when the backside pulling fabrics 37L and 37R are fixed at an arbitrary position of the seat back frame 10 to which the pad 20 is assembled.

[0030] The side surface skins 32L and 32R extend from the front to the back along the surfaces of the side pads 22L and 22R. The end portions of the side surface skins 32L and 32R of the present embodiment located on the front side are inserted into the slits 24L and 24R, and are attached by sewing or the like together with the end portions of the front side skin main body 31A to the front side pulling fabrics 34L and 34R described above. Further, to the end portions of the side surface skins 32L and 32R of the present embodiment located on the back side, the above-described back side pulling fabrics 37L and 37R are attached by sewing or the like together with the back side skin main body 33A and the pocket forming skin 35.

[0031] In addition, side surface pulling fabrics 39L and 39R may be attached by sewing or the like at arbitrary positions of the side surface skins 32L and 32R, for example, at the boundary portion between the back surface and the side surface of the seat back 1. The side surface pulling fabrics 39L and 39R can be constituted by strip-shaped fabrics that are long in the vertical direction, similar to the other pulling fabrics described above. And the tips of the side surface pulling fabrics 39L and 39R may be arranged to extend toward the central portion in the width direction along the back side surface of the side pads 22L and 22R.

[0032] When attaching the skin 30 having the above-described configuration to the seat back frame 10 to which the pad 20 is assembled, it is preferable from the viewpoint of aesthetics to attach it so that wrinkles do not occur, particularly at the left and right end portions of the opening of the pocket portion 36. Since the pocket portion 36 is formed by the back side skin main body 33A and the pocket forming skin 35, it is important to prevent the outward tension in the width direction acting on these skins from decreasing in order to suppress the occurrence of wrinkles at the above-described positions.

[0033] FIG. 4 is an enlarged cross-sectional view of part B in FIG. 3. Based on the above points, an example of the attachment structure of the skin 30 having the above-described configuration to the seat back frame 10 to which the pad 20 is attached will be described below mainly with reference to FIGS. 3 and 4.

[0034] The backside skin 33 of this embodiment is attached to the seat back frame 10 with the pads 20 assembled by fixing the backside pull fabrics 37L and 37R to the front side pull fabrics 34L and 34R. The fixing means between the backside pull fabrics 37L and 37R and the front side pull fabrics 34L and 34R is not particularly limited. For example, so-called J-hooks and I-hooks can be adopted. Note that the backside skin 33 has its left and right ends attached to the seat back frame 10 with the pads 20 attached by the backside pull fabrics 37L and 37R, but the structure of these left and right attachment parts may be symmetric. Therefore, only the details of the fixing part on the left side are illustrated as Figure 4, and the enlarged view of the right side part is omitted from the illustration.

[0035] To explain in detail an example of the above-described fixing means, first I-hooks 40 for fixing to the front side pull fabrics 34L and 34R are attached to the tip ends of the backside pull fabrics 37L and 37R, and first J-hooks 41 capable of fixing the first I-hooks 40 are attached at intermediate positions of the front side pull fabrics 34L and 34R. Then, by inserting the first I-hooks 40 into the first J-hooks 41, the front side pull fabrics 34L and 34R and the backside pull fabrics 37L and 37R can be fixed. Note that in this embodiment, a structure of J-hooks and I-hooks is adopted as the fixing means between the backside pull fabrics 37L and 37R and the front side pull fabrics 34L and 34R, but other fixing structures, such as hog rings, clips, sewing, etc. can also be adopted as appropriate.

[0036] By fixing the above-described first I-hooks 40 and first J-hooks 41, the backside skin 33 and the front side skin 31 are attached to the seat back frame 10 with the pads 20 attached so as to sandwich the central pad 21 from the front and back directions. Also, since the ends of the side skin 32L and 32R are fixed to the front side pull fabrics 34L and 34R and the backside pull fabrics 37L and 37R, respectively, the side skin 32L and 32R are also attached to the seat back frame 10 with the pads 20 attached so as to cover the surfaces of the side pads 22L and 22R.

[0037] Further, in order to more firmly attach the front - side skin 31 and the side - side skins 32L and 32R to the seat - back frame 10 to which the pad 20 is attached, it is advisable to fix the front - side pulling fabrics 34L and 34R and the side - side pulling fabrics 39L and 39R. The fixing means between the front - side pulling fabrics 34L and 34R and the side - side pulling fabrics 39L and 39R is not particularly limited, but J - hooks and I - hooks can be adopted. Specifically, at the tip portions of the front - side pulling fabrics 34L and 34R, second I - hooks 42 for fixing to the side - side pulling fabrics 39L and 39R are attached, and at the tip portions of the side - side pulling fabrics 39L and 39R, second J - hooks 43 capable of fixing the second I - hooks 42 are attached. Then, by inserting the second I - hook 42 into the second J - hook 43, the front - side pulling fabrics 34L and 34R and the side - side pulling fabrics 39L and 39R can be fixed.

[0038] Here, when the first I - hook 40 of the back - side pulling fabrics 37L and 37R is fixed to the first J - hook 41, the tension along the extending direction of the back - side pulling fabrics 37L and 37R acts on the back - side skin main body 33A and the skin for pocket formation 35. Therefore, if the component of the tension in the direction toward the inner side in the width direction of the seat - back 1 is included, the force component toward the inner side in the width direction acts on the pocket portion 36, which may cause wrinkles in the pocket portion 36. Thus, in the present embodiment, by setting the fixing state of the back - side pulling fabrics 37L and 37R so that the angle θ formed between the back - side pulling fabrics 37L and 37R and the back - side skin main body 33A in the mounting state of the back - side skin 33 is 90° or more, the generation of the force component toward the inner side in the width direction described above is avoided.

[0039] In the present embodiment, as a specific method for setting the above-described angle θ to 90° or more, the widthwise length W1 of the back-side skin main body 33A is adjusted to be equal to or less than the widthwise length W2 of the front-side skin main body 31A. By adjusting the length in this manner, the angle θ formed between the back-side draw fabrics 37L and 37R and the back-side skin main body 33A after attaching the back-side skin 33 can be relatively easily set to 90° or more. In the present embodiment, as shown in FIG. 4, a case where the angle θ between the back-side draw fabrics 37L and 37R and the back-side skin main body 33A is 90° is illustrated, but the angle may be larger than 90°. The upper limit value of the angle θ formed between the back-side draw fabrics 37L and 37R and the back-side skin main body 33A can be, for example, about 160°.

[0040] As described above, according to the seat back 1 according to the present embodiment, by setting the angle θ between the back-side draw fabrics 37L and 37R and the back-side skin main body 33A to 90° or more, the back-side skin 33 can be attached to the seat back frame 10 to which the pad 20 is attached without applying a tension directed inward in the width direction to the back-side skin 33. Thereby, the generation of wrinkles in the pocket portion 36 can be suppressed, and the appearance of the seat back 1 can be maintained.

[0041] Further, as described above, in the seat back 1 according to the present embodiment, the slits 24L and 24R are provided at positions where the center pad 21 and the side pads 22L and 22R are adjacent to each other. Therefore, for example, even when the center pad 21 moves in the front-rear direction due to the function of the lumbar support 11 when the seated occupant sits on or gets off the vehicle seat, the side pads 22L and 22R do not move in conjunction with the movement. Thereby, it is possible to suppress the front ends of the side pads 22L and 22R from deforming so as to open outward in the width direction due to the use of the vehicle seat.

[0042] In the seat back 1 according to the above-described embodiment, an example in which the rear side pull-out fabrics 37L and 37R and the front side pull-out fabrics 34L and 34R are fixed has been illustrated. However, if the angle θ formed by the rear side pull-out fabrics 37L and 37R and the rear side skin main body 33A can be 90° or more, the object to which the rear side pull-out fabrics 37L and 37R are fixed is not limited to the above example. Specifically, the rear side pull-out fabrics 37L and 37R may be fixed to, for example, a pair of side frames of the seat back frame 10. In this case, the front side skin 31 may also be fixed to other members, such as the center pad 21 and the lumbar support 11, using clips, hog rings, or the like.

[0043] The present disclosure is not limited to the above-described embodiments, and various modifications can be made and implemented without departing from the gist of the present disclosure. And all of them are included in the technical idea of the present disclosure.

Explanation of Reference Numerals

[0044] 1 Seat back 10 Seat back frame 20 Pad 21 Center pad 22L, 22R Side pads 23 Upper pad 24L, 24R Slits 30 Skin 31 Front side skin 31A Front side skin main body 32L, 32R Side surface side skins 33 Rear side skin 33A Rear side skin main body 34L, 34R Front side pull-out fabrics 35 Skin for pocket formation 36 Pocket part 37L, 37R Rear side pull-out fabrics 38 Band-like body 39L, 39R Side surface side pull-out fabrics

Claims

1. A seat back frame, a pad assembled to the seat back frame and covering at least the front side of the seat back frame, a skin that covers the outer periphery of the seat back frame to which the pad is assembled, and includes a front side skin that covers the front side of the seat back frame and a back side skin that covers the back side of the seat back frame, the back side skin includes, a back side skin main body, a pocket portion formed by overlapping another skin on the surface of the back side skin main body, a pair of back side pulling cloths attached to both ends in the width direction of the back side skin main body for fixing the back side skin main body, and the angle formed by the pair of back side pulling cloths and the back side skin main body in the attached state of the back side skin is 90 degrees or more, and the pair of back side pulling cloths, a seat back.

2. The pad includes a central pad that supports the waist of the seated occupant and a pair of side pads disposed at both ends in the width direction of the central pad, the front side skin includes a front side skin main body that covers the surface of the central pad and a pair of front side pulling cloths attached to both ends in the width direction of the front side skin main body and extending from both ends in the width direction of the central pad to the back side of the seat back frame, the pair of back side pulling cloths are respectively attached to the pair of front side pulling cloths, The seat back according to Claim 1.

3. The length in the width direction of the back side skin main body is less than or equal to the length in the width direction of the front side skin main body, The seat back according to Claim 2.

4. The pad includes a central pad that supports the waist of the seated occupant and a pair of side pads disposed at both ends in the width direction of the central pad, a slit is formed at a position where the central pad and the pair of side pads are adjacent, The seat back according to Claim 1.

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