Seat cover and vehicle seat

Abstract

To provide a seat cover and a vehicle seat capable of suppressing generation of wrinkles on a contact surface with an occupant while unifying tactile feelings on the contact surface with the occupant.SOLUTION: A seat back cover 20 of a vehicle seat 10 is made of an elastic material, and includes a skin material 22 constituting at the surface a part of a contact surface 12A with an occupant, and a urethane foam slab 24 disposed along a backside opposite to the surface of the skin material 22. The seat back cover 20 is joined at the skin material 22 to the urethane foam slab 24 to be bent in a state where tension is generated on the skin material 22.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a seat cover and a vehicle seat. [Background technology]

[0002] Patent Document 1 below discloses an invention related to a vehicle seat. In this vehicle seat, a urethane foam slab that constitutes part of the seat covering (seat cover) has slits formed in it, which can prevent wrinkles and the like from occurring on the surface of the seat covering when the seat covering is placed along the curved surface of the seat pad. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-217801 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the prior art disclosed in Patent Document 1, it is conceivable that the tactile sensation may differ between the area where the slits are formed in the urethane foam slab on the seat skin and the other areas.

[0005] Taking the above facts into consideration, the present invention aims to provide a seat cover and a vehicle seat that can achieve a unified tactile feel on the surface that comes into contact with the occupant while preventing wrinkles and the like from occurring on the surface that comes into contact with the occupant. [Means for solving the problem]

[0006] The seat cover of the first aspect is capable of covering a seat pad that supports an occupant, and comprises a skin material whose surface forms part of the surface that comes into contact with the occupant and is made of an elastic material, and a urethane foam slab arranged along the back surface of the skin material opposite the front surface, and the skin material is curved by being joined to the urethane foam slab while tension is generated in the skin material.

[0007] The seat cover according to the first aspect can cover the seat pad that supports the occupant.

[0008] However, since the support surface of a seat pad that supports the occupant tends to be curved, if the seat cover is placed along this support surface, wrinkles or the like may occur on the surface of the seat cover.

[0009] In this regard, it is possible to reduce the restoring force of the urethane foam slab by forming a slit in the urethane foam slab that forms part of the seat cover, thereby preventing wrinkles from forming on the surface of the seat cover when the seat cover is placed along the support surface of the seat pad.

[0010] However, if such a configuration is adopted, it is conceivable that the tactile sensation, etc., will be different between the areas where the slits are formed in the urethane foam slab of the seat cover and other areas.

[0011] In this embodiment, the seat cover is made of an elastic material and includes a skin material whose surface forms part of the contact surface with the occupant, and a urethane foam slab arranged along the back surface of the skin material opposite the surface.

[0012] The seat cover is curved by joining the skin material to the urethane foam slab while tension is generated in the skin material.

[0013] Therefore, in this embodiment, the seat cover can be placed along the support surface of the seat pad without forming slits or the like in the urethane foam slab.

[0014] The seat cover of the second aspect is the seat cover of the first aspect, in which a first V-shaped notch is formed at a first seam between the urethane foam slab and a first edge of the upholstery material, and a second V-shaped notch is formed at a second seam between the urethane foam slab and the upholstery material and a second edge of the urethane foam slab, so that tension is generated in the upholstery material in a direction from the first edge toward the apex of the first notch, and the second notch is exposed inside the first notch when viewed from the upholstery material side.

[0015] In the seat cover according to the second aspect, a V-shaped first notch is formed in the first seam between the first edge of the upholstery material and the urethane foam slab.

[0016] On the other hand, a second V-shaped notch is formed in a second seam between the second edge of the urethane foam slab and the skin material.

[0017] A tension is generated in the skin in a direction from the first edge portion toward the apex of the first notch portion, and the second notch portion is exposed inside the first notch portion when viewed from the skin side.

[0018] Therefore, in this embodiment, the positioning of the skin and the urethane foam slab can be determined based on the positional relationship between the first notch and the second notch. Also, tension generated in the skin is prevented from acting in the direction that would cause the first notch to expand, thereby preventing stress concentrations from occurring around the first notch in the skin.

[0019] A vehicle seat according to a third aspect includes a seat pad having a curved support surface that supports the occupant, and a seat cover according to claim 1 or claim 2 that covers the seat pad and is positioned against the support surface.

[0020] A vehicle seat according to the third aspect includes a seat pad with a curved support surface that supports an occupant, and this seat pad is covered with the seat cover according to the first or second aspect. The seat cover according to the first or second aspect is then placed on the support surface of the seat pad.

[0021] Therefore, in this embodiment as well, the seat cover can be placed along the support surface of the seat pad without forming a slit in the urethane foam slab. [Effects of the Invention]

[0022] As described above, the seat cover and vehicle seat of the present invention have the excellent effect of achieving a uniform tactile feel on the surface that comes into contact with the occupant while suppressing the occurrence of wrinkles and the like on the surface that comes into contact with the occupant. [Brief explanation of the drawings]

[0023] [Figure 1] 1 is a cross-sectional view (a cross-sectional view showing a state cut along line 1-1 in FIG. 2) that schematically shows the configuration of the seat cover according to the present embodiment. [Figure 2] 1 is a front view schematically illustrating a configuration of a vehicle seat according to an embodiment of the present invention. [Figure 3] 4 is a cross-sectional view schematically showing the configuration of an end portion of the seat cover according to the present embodiment. FIG. [Figure 4] 10 is a plan view schematically showing the relationship between the notch portion of the cover material and the notch portion of the urethane foam slab during the manufacture of the seat cover according to the present embodiment. FIG. [Figure 5] 10 is a plan view schematically showing the relationship between the notch portion of the skin material and the notch portion of the urethane foam slab when the seat cover according to the embodiment is completed. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0024] An example of an embodiment of a seat cover and a vehicle seat according to the present invention will be described below with reference to Figures 1 to 5. Note that arrows FR, UP, and LH shown as appropriate in each figure indicate the forward, upward, and leftward directions, respectively, of a "vehicle seat 10 (hereinafter referred to as seat 10)" according to this embodiment.

[0025] As shown in FIG. 2, the seat 10 includes a seat back 12 that supports the back of the occupant, a seat cushion 14 that supports the buttocks and thighs of the occupant, and a headrest 16 that supports the head of the occupant.

[0026] As shown in FIG. 1, the seat back 12 comprises a "seat back pad 18" as a seat pad that constitutes the main part of the seat back and is made of urethane foam, and a "seat back cover 20" as a seat cover that covers the seat back pad 18.

[0027] Specifically, the seatback pad 18 is shaped like a rectangular parallelepiped with its longitudinal direction aligned with the vertical direction of the seat, and its front surface is a "support surface 18A" that supports the occupant. The support surface 18A is curved so that its central portion in the width direction of the seat is convex toward the rear of the seat when viewed from the vertical direction of the seat.

[0028] On the other hand, the seat back cover 20 is configured in a bag shape and includes a plurality of upholstery materials cut to a predetermined shape, including an "upholstery material 22" whose surface forms part of the "contact surface 12A" of the seat back 12 with the occupant, and a plurality of urethane foam slabs cut to a predetermined shape, including a "urethane foam slab 24" arranged along the back surface of the upholstery material 22, and is placed over the seat back pad 18 from above the seat.

[0029] In more detail, the skin material 22 is made of an elastic material such as cloth, leather, or synthetic leather, and as shown in FIG. 4, the "edge portion 22A" as the first edge portion thereof is provided with a "seam allowance portion 22A1" as the first seam allowance portion used for sewing to the urethane foam slab 24.

[0030] The seam allowance portion 22A1 is cut out in a V-shape at multiple locations at predetermined intervals in the extending direction of the edge portion 22A, thereby forming multiple "notch portions 26" as first notch portions.

[0031] On the other hand, the "edge portion 24A" as the second edge portion of the urethane foam slab 24 is positioned along the edge portion 22A of the skin material 22, and this edge portion 24A is provided with a "seam allowance portion 24A1" as the second seam allowance portion used for sewing to the skin material 22.

[0032] The seam allowance portion 24A1 is cut out in a V-shape at multiple locations at predetermined intervals in the extending direction of the edge portion 24A, thereby forming multiple "notch portions 28" as second notch portions.

[0033] Here, in this embodiment, before sewing, when the skin material 22 and the urethane foam slab 24 are overlapped so that one edge 22A and one edge 24A are aligned, the other edge 22A is positioned on the side of the one edge 22A relative to the other edge 24A.

[0034] 3 and 5, in this embodiment, the seam allowance 22A1, the seam allowance 24A1 and the slit cord 30 are sewn (joined) together in a state in which tension is generated in the covering material 22 by pulling the covering material 22 in a direction from the edge 22A toward the apex of the notch 26, using the position of the slit cord 30 arranged relative to the urethane foam slab 24 as a reference. Note that in Fig. 3, the edge 22A of the covering material 22 in a state in which it is sewn to the urethane foam slab 24 is shown by a two-dot chain line, and the edge 22A of the covering material 22 in a state in which it is released from the stitching of the urethane foam slab 24 is shown by a solid line.

[0035] At this time, the positioning of the skin material 22 and the urethane foam slab 24 is performed based on the positions of the notch portion 26 and the notch portion 28. After the skin material 22 and the urethane foam slab 24 are sewn together, the notch portion 28 is exposed inside the notch portion 26 when viewed from the skin material 22 side.

[0036] As shown in Figure 1, in the seat back cover 20 configured as described above, in an unloaded state, the portion of the seat back cover 20 that forms the contact surface 12A of the seat back 12 is curved so as to be convex toward the rear of the seat due to the restoring force of the skin material 22.

[0037] Furthermore, when the seat back cover 20 is attached to the seat back pad 18, the portion of the seat back cover 20 that forms the contact surface 12A is disposed along the support surface 18A of the seat back pad 18.

[0038] On the other hand, the seat cushion 14 includes a seat cushion pad (not shown) that constitutes the main part of the seat cushion and is made of urethane foam, and a seat cover (seat cushion cover 32) that covers the seat cushion pad. The basic structure of the seat cushion cover 32 is the same as that of the seat back cover 20.

[0039] <Actions and Effects of This Embodiment> Next, the operation and effects of this embodiment will be described.

[0040] In this embodiment, as shown in FIGS. 1 and 2, a seat back pad 18 that supports an occupant can be covered with a seat back cover 20.

[0041] However, since the support surface 18A of the seat back pad 18 that supports the occupant is curved, if the seat back cover 20 is positioned so as to follow the support surface 18A, wrinkles or the like may occur on the surface of the seat back cover 20.

[0042] In this regard, it is conceivable that by forming slits or the like in the urethane foam slab 24 that constitutes part of the seat back cover 20, the restoring force of the urethane foam slab 24 can be reduced, and wrinkles or the like can be prevented from occurring on the surface of the seat back cover 20 when the seat back cover 20 is placed along the support surface 18A of the seat back pad 18.

[0043] However, if such a configuration is adopted, it is conceivable that the tactile sensation, etc., will be different between the areas where the slits are formed in the urethane foam slab 24 of the seat back cover 20 and other areas.

[0044] In this embodiment, the seat back cover 20 is made of an elastic material and includes a skin material 22 whose surface forms part of the contact surface 12A with the occupant, and a urethane foam slab 24 arranged along the back surface of the skin material 22 opposite the surface.

[0045] The seat back cover 20 is curved by joining the skin material 22 to the urethane foam slab 24 while tension is generated in the skin material 22.

[0046] Therefore, in this embodiment, the seat back cover 20 can be disposed along the support surface 18A of the seat back pad 18 without forming a slit or the like in the urethane foam slab 24.

[0047] In this embodiment, as shown in FIG. 5, a V-shaped notch 26 is formed in the seam 22A1 between the edge 22A of the skin material 22 and the urethane foam slab 24.

[0048] On the other hand, a V-shaped notch 28 is formed in a seam 24A1 between the edge 24A of the urethane foam slab 24 and the skin material 22.

[0049] A tension is generated in the skin 22 in the direction from the edge 22A toward the apex of the notch 26, and the notch 28 is exposed inside the notch 26 when viewed from the skin 22 side.

[0050] Therefore, in this embodiment, the positioning of the skin material 22 and the urethane foam slab 24 can be determined based on the positional relationship between the notch portion 26 and the notch portion 28. Furthermore, tension generated in the skin material 22 is prevented from acting in a direction that would cause the notch portion 26 to expand, thereby preventing stress concentration areas from occurring around the notch portion 26 in the skin material 22.

[0051] As described above, the seat 10 and seat back cover 20 of this embodiment can prevent wrinkles and the like from occurring on the contact surface 12A of the seat back 12 that comes into contact with the occupant while achieving a uniform tactile feel. [Explanation of symbols]

[0052] 10 Vehicle seats 12A contact surface 18 Seat back pad (seat pad) 18A Support surface 20 Seat back cover (seat cover) 22 Skin material 22A Edge (1st edge) 22A1 Seam allowance (first seam allowance) 24 Urethane foam slab 24A Edge (second edge) 24A1 Seam allowance (second seam allowance) 26 Notch part (first notch part) 28 Notch part (second notch part) 32 Seat cushion cover (seat cover)

Claims

1. The seat pad that supports the occupant can be covered with the protective film. a surface of the skin material that forms part of the contact surface with the occupant and is made of an elastic material; a urethane foam slab arranged along the back surface of the skin material opposite to the front surface, The skin material is curved by being joined to the urethane foam slab while tension is generated in the skin material. Seat covers.

2. a first V-shaped notch is formed in a first seam between the first edge of the skin material and the urethane foam slab; a second V-shaped notch is formed in a second seam between the second edge of the urethane foam slab and the skin material; tension is generated in the skin material in a direction from the first edge portion to the apex of the first notch portion; the second notch portion is exposed inside the first notch portion when viewed from the skin side; The seat cover according to claim 1.

3. the seat pad having a curved support surface for supporting the occupant; a seat cover according to claim 1 or 2, the seat cover covering the seat pad and being placed against the support surface; A vehicle seat comprising:

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