Seat structure

Abstract

The present invention provides a seat structure that makes the deformable area of ​​the seat back larger than before so as to fully support the posture and body shape of the occupant. The seat back (14) comprises: an upper end seat cover (22) provided on the upper end surface (18); an upper end surface cushion (24) arranged on the back side of the upper end seat cover; an abutment seat cover (26) provided on the abutment surface (20); an abutment cushion (28) arranged on the back side of the abutment seat cover and below the upper end surface cushion; and an air bag (30) provided so as to be able to adjust the amount of air inside, wherein the lower end side of the upper end seat cover covers the lower surface of the upper end cushion and is fixed to a first fixing point (P1) provided inside the seat back, and the upper end side of the abutment seat cover covers the upper surface of the abutment cushion and is fixed to a second fixing point (P2) provided inside the seat back.

Description

Technical Field

[0001] The present invention relates to a seat structure for a seat mounted on a vehicle. Background Art

[0002] Conventionally, there is known a seat structure in which the shape and angle of a seat back can be changed by supplying air to an air bag built into the seat to inflate the air bag.

[0003] For example, Patent Document 1 discloses a seat structure in which an airbag (air bag) is arranged in a seat back shoulder portion. In the seat structure disclosed in Patent Document 1, the airbag (air bag) is inflated to deform the support surface formed by the seat back shoulder portion toward the vehicle front side of the seat.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2016-196202 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] However, in the seat structure disclosed in Patent Document 1, the seat cover (seat skin) is integrally formed continuously from the upper end surface of the seat back on which the headrest is mounted to the lower end portion of the contact surface that contacts the back of the occupant.

[0009] Therefore, in the seat structure disclosed in Patent Document 1, even when the airbag (air bag) is supplied with air and inflated toward the front of the vehicle, it is difficult for the seat back to deform. As a result, the seat structure disclosed in Patent Document 1 has a small deformable area of ​​the seat back, and insufficient support is provided to accommodate the occupant's posture and body shape.

[0010] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a seat structure in which the deformable region of a seat back is larger than before and which can sufficiently support the posture and body shape of an occupant.

[0011] Means for solving problems

[0012] In order to achieve the aforementioned object, the seat structure of the present invention includes a headrest and a seat back, wherein the seat back has an upper end surface for carrying the headrest and an abutment surface for abutting the back of the occupant, and the seat structure is characterized in that the seat back comprises: an upper end surface seat cover, which is provided on the upper end surface; an upper end surface cushion pad, which is arranged on the back side of the upper end surface seat cover; an abutment surface seat cover, which is provided on the abutment surface; an abutment surface cushion pad, which is arranged on the back side of the abutment surface seat cover and below the upper end surface cushion pad; and an air bag, which is arranged on the back side of the abutment surface seat cover and is provided to be able to adjust the amount of air inside, the lower end side of the upper end surface seat cover covers the lower surface of the upper end surface cushion pad and is fixed to a first fixing point provided inside the seat back, and the upper end side of the abutment surface seat cover covers the upper surface of the abutment surface cushion pad and is fixed to a second fixing point provided inside the seat back.

[0013] Effects of the Invention

[0014] The present invention can provide a seat structure in which the deformable region of the seat back is larger than before and the seat structure can be sufficiently supported to adjust the posture and body shape of the occupant. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a perspective view of a seat to which the seat structure according to the embodiment of the present invention is applied.

[0016] Figure 2 It is shown from Figure 1 The shown state is a perspective view of a state where the headrest is removed.

[0017] Figure 3 yes Figure 2 Exploded three-dimensional diagram.

[0018] Figure 4 It is a cross-sectional view of the seat back along the vertical direction.

[0019] Figure 5 yes Figure 4 An enlarged cross-sectional view of the overlap area is shown in FIG.

[0020] Figure 6 It is shown in Figure 4 An operation explanatory diagram of a state in which the air bag is deployed and the seat cover abuts against the surface and is inflated.

[0021] Figure 7 (a) to (c) show Figures 1 to 6 Partially enlarged cross-sectional views of first to third modified examples of the present embodiment are shown.

[0022] Description of Reference Numerals

[0023] 10 seats

[0024] 14 Seat Back

[0025] 16 Headrest

[0026] 18 Upper end surface

[0027] 20 contact surface

[0028] 22 Upper seat cover

[0029] 24 Upper end surface buffer pad

[0030] 26 Seat cover contact surface

[0031] 28 contact surface cushion

[0032] 30 air bags

[0033] 34 Overlapping Area

[0034] 38 embedded lines

[0035] 40, 46 elastomers

[0036] 42 Other elastomers

[0037] 44 joint

[0038] P1 1st fixed point

[0039] P2 2nd fixed point

[0040] A1 and A2 areas

[0041] L1, L2 elasticity (elongation)

[0042] S1, S2 sizes

[0043] D Crew DETAILED DESCRIPTION

[0044] Next, embodiments of the present invention will be described in detail with reference to appropriate drawings.

[0045] like Figure 1 As shown, a seat 10 to which the seat structure according to the embodiment of the present invention is applied includes a seat bottom portion 12, a seat back 14, and a headrest 16. The surfaces of the seat bottom portion 12, the seat back 14, and the headrest 16 are respectively covered with a seat cover described later.

[0046] The seat portion 12 has a passenger D (see Figure 6 The seat surface is the part that bears the weight of the passenger D. The headrest 16 is the part that supports the head of the passenger D, and is supported by two support members 17 (see Figure 1 ) is mounted on the upper end surface 18 of the seat back 14 (see Figure 2). It should be noted that Figure 2 In the figure, it is shown that Figure 1 The seat 10 is shown with the headrest 16 removed.

[0047] The seat back 14, also known as the backrest, supports the upper body (back) of the occupant D. The seat back 14 has an upper end surface 18 on which the headrest 16 is mounted; an abutment surface 20 that abuts the back of the occupant D; and a rear surface (not shown) located on the opposite side of the abutment surface 20 in the vehicle's longitudinal direction and behind the abutment surface 20. The upper end surface 18 is a generally flat surface extending in the thickness direction at the upper end of the seat back 14. The abutment surface 20 is the surface of the seat back 14 on the vehicle's front side. A left front surface 21a and a right front surface 21b are provided on the left and right sides of the abutment surface 20, respectively, along the vehicle's width.

[0048] The seat back 14 includes a seat frame 21 (see FIG. Figure 3 ) and polyurethane sponge 23 (reference Figure 4 The seat frame 21 is composed of a highly rigid frame body that forms the outer shape of the seat 10. The polyurethane sponge 23 is composed of, for example, a cushioning material inserted between the seat frame 21 and the seat cover.

[0049] The seat back 14 also includes an upper end surface seat cover 22 provided on the upper end surface 18 on which the headrest 16 is mounted, and an upper end surface cushion 24 disposed on the back side of the upper end surface seat cover 22. Furthermore, the seat back 14 includes an abutment surface seat cover 26 provided on the abutment surface 20, and an abutment surface cushion 28 disposed on the back side of the abutment surface seat cover 26 and below the upper end surface cushion 24.

[0050] In the present embodiment, the seat cover is configured such that the upper end seat cover 22 and the contact surface seat cover 26 are separate bodies (see FIG. Figure 5 ). In addition, the upper end surface cushion pad 24 and the contact surface cushion pad 28 are separate and configured separately from each other (refer to Figure 4 ).

[0051] In addition, if Figure 4 As shown, the seat back 14 includes: an air bag 30, which is arranged on the back side of the abutment surface seat cover 26 and is provided to be able to adjust the amount of air inside; and a cushion member 32, which is arranged on the back side of the abutment surface cushion 28. The air bag 30 is arranged between the abutment surface seat cover 26 and the abutment surface cushion 28 (see FIG. Figure 4 ).

[0052] like Figure 5As shown, the lower end side of the upper end seat cover 22 covers the lower surface of the upper end cushion pad 24 and is fixed to a first fixing point P1 provided inside the seat back 14. Furthermore, the upper end side of the abutment surface seat cover 26 covers the upper surface of the abutment surface cushion pad 28 and is fixed to a second fixing point P2 provided inside the seat back 14. It should be noted that the first fixing point P1 and the second fixing point P2 will be described in detail later.

[0053] like Figure 5 As shown, the seat back 14 includes an overlap region 34 between the upper end surface cushion 24 and the abutment surface cushion 28, where the lower end side of the upper end surface seat cover 22 and the upper end side of the abutment surface seat cover 26 vertically overlap with each other. Specifically, the overlap region 34 is formed by bending the lower end side of the upper end surface seat cover 22 toward the vehicle rear, and bending the upper end side of the abutment surface seat cover 26 toward the vehicle rear, above the seat back 14 and between the upper end surface cushion 24 and the abutment surface cushion 28, so that the bent portions of the two portions vertically overlap with each other.

[0054] The "overlapping region 34" includes not only a state where the lower end of the upper seat cover 22 and the upper end of the abutting seat cover 26 are simply overlapped vertically, but also states such as a state where the lower end of the upper seat cover 22 and the upper end of the abutting seat cover 26 are vertically overlapped and then sewn together using thread or the like, or a state where the lower end of the upper seat cover 22 and the upper end of the abutting seat cover 26 are fixed to each other using adhesive or the like (joined region).

[0055] It should be noted that the overlap region 34 is a slit extending substantially linearly along the vehicle width direction when viewed from the front side of the vehicle (see FIG. Figure 1 、 Figure 2 ), which is configured to include a recessed portion 36 (see Figure 5 ).

[0056] like Figure 3 As shown, the first and second fixing points P1 and P2 are formed by an insert line 38 disposed inside the seat back 14. The dimension S1 of the insert line 38 in the vehicle width direction is larger than the dimension S2 of the overlap region 34 in the vehicle width direction (S1>S2).

[0057] In addition, the embedded wire 38 is embedded in the interior of the upper end surface cushion 24 along the vehicle width direction (see Figure 5 ). In addition, the embedded line 38 is located above the overlapped area 34 formed by overlapping the lower end side of the upper end seat cover 22 and the upper end side of the contact surface seat cover 26 (see Figure 5It should be noted that, in this embodiment, the first fixing point P1 and the second fixing point P2 are formed by a single insert wire 38 (see Figure 5 ), but is not limited thereto, and may be fixed to the seat frame 21 (see Figure 3 ) In addition, another wire frame independent of the embedded wire 38 may be provided to independently fix the lower end side of the upper end surface seat cover 22 and the upper end side of the contact surface seat cover 26.

[0058] The air bag 30 is a pneumatic device that can be expanded and contracted using air pressure, and is composed of a plurality of air bags 30 of different sizes (see Figure 3 The plurality of air bags 30 are stacked in multiple layers along the thickness direction of the contact surface cushion 28 (see Figure 4 ).

[0059] Specifically, a single large bag 30a is arranged in the first layer closest to the contact surface cushion 28. Two small bags 30b are arranged vertically in the second layer overlapping the large bag 30a. Furthermore, one small bag 30b is arranged only on the upper portion of the third layer overlapping the second layer. It should be noted that in this embodiment, the air bag 30 is composed of a single large bag 30a and four small bags 30b, but this is not limiting and may be composed of air bags 30 of various sizes.

[0060] like Figure 4 As shown, the air bag 30 is positioned above the center of the seat back 14 in the vehicle vertical direction. Furthermore, the elastic modulus L1 (elongation) of at least a portion of an area A1 of the contact surface seat cover 26 located above the center of the seat back 14 in the vehicle vertical direction is greater than the elastic modulus L2 (elongation) of an area A2 of the contact surface seat cover 26 located below the center of the seat back 14 in the vehicle vertical direction (L1>L2). It should be noted that "at least a portion of the area A1" preferably includes, for example, an area overlapping with the air bag 30.

[0061] The seat 10 to which the seat structure of this embodiment is applied is basically constructed as described above, and its functions and effects will be described below.

[0062] In this embodiment, the lower end side of the upper end seat cover 22 covers the lower surface of the upper end cushion pad 24 and is fixed to a first fixing point P1 provided inside the seat back 14. Furthermore, the upper end side of the abutment surface seat cover 26 covers the upper surface of the abutment surface cushion pad 28 and is fixed to a second fixing point P2 provided inside the seat back 14.

[0063] In this embodiment, the upper end seat cover 22 and the contact surface seat cover 26 are formed separately and fixed to a first fixing point P1 and a second fixing point P2 provided inside the seat back 14, respectively. When air is supplied to the air bag 30 provided on the back of the contact surface seat cover 26 and the air bag 30 is inflated, the tension of the contact surface seat cover 26 is relaxed, and the contact surface seat cover 26 in the area A1 overlapping with the air bag 30 is more easily inflated than in the past (see FIG. 1 ). Figure 5 、 Figure 6 As a result, in this embodiment, a seat structure can be obtained in which the deformable area of ​​the seat back 14 is larger than before, thereby fully supporting the posture and body shape of the occupant D. It should be noted that since the upper end seat cover 22 is formed separately from the contact surface seat cover 26, the effect of the contact surface seat cover 26 expanding toward the back of the occupant D is minimal.

[0064] In this embodiment, the seat back 14 includes an overlapping region 34 (including a joining region) between the upper end surface cushion 24 and the abutment surface cushion 28, where the lower end side of the upper end surface seat cover 22 and the upper end side of the abutment surface seat cover 26 overlap each other (see FIG. Figure 5 ). In addition, the first fixed point P1 and the second fixed point P2 are formed by an embedded line 38 arranged inside the seat back 14. The dimension S1 of the embedded line 38 in the vehicle width direction is larger than the dimension S2 of the overlap area 34 in the vehicle width direction (S1>S2) (refer to Figure 3 ).

[0065] In this embodiment, the dimension S1 of the inlay thread 38 is set to be larger than the dimension S2 of the overlap region 34 (S1>S2), and each seat cover (the upper end seat cover 22 and the contact surface seat cover 26) is secured to the inlay thread 38. Therefore, in this embodiment, even if the air bag 30 deploys and the contact surface seat cover 26 is subjected to tensile force, the contact surface seat cover 26 can be appropriately prevented from separating from the inlay thread 38. As a result, the stability of the seat structure can be improved.

[0066] In this embodiment, the embedded wire 38 is embedded in the interior of the upper end surface cushion 24 along the vehicle width direction (see FIG. Figure 3 Thus, in this embodiment, the embedded wire 38 to which the lower end side of the upper end seat cover 22 and the upper end side of the contact surface seat cover 26 are respectively fixed can be easily embedded in the interior of the upper end surface cushion pad 24. In addition, since the lower end side of the upper end seat cover 22 and the upper end side of the contact surface seat cover 26 are each fixed to a single embedded wire 38, the number of parts and the number of assembly steps can be reduced.

[0067] In the present embodiment, the air bag 30 is arranged above the center of the seat back 14 in the vehicle vertical direction. In addition, the elastic modulus L1 (elongation) of at least a portion of the region A1 of the contact surface seat cover 26 is greater than the elastic modulus L2 (elongation) of the region A2 of the contact surface seat cover 26 (L1>L2), wherein the region A1 is located above the center of the seat back 14 in the vehicle vertical direction and the region A2 is located below the center of the seat back 14 in the vehicle vertical direction (see FIG. 2 ). Figure 4 ).

[0068] In this embodiment, by setting the elastic modulus L1 of the area A1 of the contact surface seat cover 26 overlapping with the air bag 30 to be greater than the elastic modulus L2 of the other area A2 (L1>L2), the contact surface seat cover 26 located in the area overlapping with the air bag 30 is more likely to inflate toward the back of the occupant.

[0069] Next, based on the following Figure 7 (a)~ Figure 7 (c) is used to illustrate a modified example of the vehicle seat structure of this embodiment. Figures 1 to 6 The same components in this embodiment shown in FIG. 1 are denoted by the same reference numerals.

[0070] exist Figure 7 In the first modified example shown in (a), unlike the present embodiment, the portion of the upper seat cover 22 that covers the lower surface of the upper cushion pad 24 is formed of an elastic body 40, such as rubber, and the portion of the abutment seat cover 26 that covers the upper surface of the abutment cushion pad 28 is formed of another elastic body 42, such as rubber. Furthermore, a joint 44 is provided near the recessed portion 36, which forms the starting point of the overlap region 34, joining the lower end of the upper seat cover 22 and the upper end of the abutment seat cover 26 using, for example, thread. It should be noted that the portions of the upper seat cover 22 and the abutment seat cover 26 other than the elastic body 40 and the other elastic body 42 are formed of, for example, fabric.

[0071] exist Figure 7 The second modification shown in (b) is different from the first modification in that the joining portion 44 is not provided. The other parts are configured similarly to the first modification.

[0072] exist Figure 7 In the third modification shown in (c), a single elastic body (e.g., rubber) 46 is provided between the upper end surface cushion pad 24 and the abutment surface cushion pad 28 to connect the joint 44 to the fixing point P (embedded wire 38 or seat frame 21), which is different from the first and second modifications.

[0073] Figure 7 (a)~ Figure 7 The first to third modified examples shown in (c) have the following characteristics: after the air bag 30 is deployed, the contact surface seat cover 26 that is expanded toward the back of the occupant D can be restored to its initial state (restored to its original state) by utilizing the elastic force of elastic bodies 40, 42, 46 such as rubber.

Claims

1. A seat structure comprising a headrest and a seat back, wherein the seat back has an upper end surface on which the headrest is mounted and a contact surface for contacting the back of an occupant, wherein: The seat back has: an upper end surface seat cover, which is provided on the upper end surface; an upper end surface cushion, which is arranged on the back side of the upper end surface seat cover; an abutment surface seat cover, which is provided on the abutment surface; an abutment surface cushion pad disposed on the back side of the abutment surface seat cover and below the upper end surface cushion pad; as well as An air bag is arranged on the back side of the seat cover and is configured to be able to adjust the amount of air inside. The lower end side of the upper end seat cover covers the lower surface of the upper end cushion pad and is fixed to a first fixing point provided inside the seat back. The upper end side of the abutment surface seat cover covers the upper surface of the abutment surface cushion pad and is fixed to a second fixing point provided inside the seat back. The seat back includes an overlapping region between the upper end surface cushion pad and the abutment surface cushion pad, where a lower end side of the upper end surface seat cover and an upper end side of the abutment surface seat cover overlap each other. The first fixing point and the second fixing point are formed by an embedded wire arranged inside the seat back. The embedding line is embedded in the upper end surface cushion along the vehicle width direction, and the embedding line is located above the vehicle relative to the overlapping region.

2. The seat structure according to claim 1, characterized in that: A dimension of the insert line in the vehicle width direction is larger than a dimension of the overlap region in the vehicle width direction.

3. The seat structure according to claim 1 or 2, characterized in that: The air bag is arranged above the center of the seat back in the vehicle vertical direction. The elongation of at least a portion of the abutment seat cover above the center of the seat back in the vehicle vertical direction is greater than the elongation of the abutment seat cover below the center of the seat back in the vehicle vertical direction.

4. The seat structure according to claim 1 or 2, characterized in that: In the upper end seat cover, the portion covering the lower surface of the upper end cushion pad is made of an elastic body. In the abutment surface seat cover, a portion covering the upper surface of the abutment surface cushion pad is formed of another elastic body.

5. The seat structure according to claim 3, characterized in that: In the upper end seat cover, the portion covering the lower surface of the upper end cushion pad is made of an elastic body. In the abutment surface seat cover, a portion covering the upper surface of the abutment surface cushion pad is formed of another elastic body.

6. A seat structure comprising a headrest and a seat back, wherein the seat back has an upper end surface on which the headrest is mounted and a contact surface for contacting the back of an occupant, wherein: The seat back has: an upper end surface seat cover, which is provided on the upper end surface; an upper end surface cushion, which is arranged on the back side of the upper end surface seat cover; an abutment surface seat cover, which is provided on the abutment surface; an abutment surface cushion pad disposed on the back side of the abutment surface seat cover and below the upper end surface cushion pad; as well as An air bag is arranged on the back side of the seat cover and is configured to be able to adjust the amount of air inside. The seat back has a joint portion that joins the lower end of the upper end surface seat cover and the upper end of the abutment surface seat cover. There are fixing points inside the seat back. An elastic body connecting the joint portion and the fixing point is provided between the upper end surface buffer pad and the abutment surface buffer pad. The seat back includes an overlapping region between the upper end surface cushion pad and the abutment surface cushion pad, where a lower end side of the upper end surface seat cover and an upper end side of the abutment surface seat cover overlap each other. The fixing point is formed by an embedded wire arranged inside the seat back. The embedding line is embedded in the upper end surface cushion along the vehicle width direction, and the embedding line is located above the vehicle relative to the overlapping region.

Images