JP6965113B2 - Seat pad for vehicles - Google Patents

Description

The present invention relates to a vehicle seat pad.

Conventionally, a vehicle seat having a two-layer structure seat pad is known as a cushion material. The following Patent Document 1 describes a vehicle seat pad in which a back layer pad, which is a foam of AS resin (acrylonitrile, styrene copolymer), is integrally molded on the side opposite to the seating surface of the surface pad, which is a foam of polyurethane resin. It is disclosed. Since the back layer pad is harder and has a lower density than the surface layer pad, the hardness can be partially different while reducing the weight of the vehicle seat pad. Further, Patent Document 2 discloses a vehicle sheet having a pad body in which a polypropylene resin foam having through holes is embedded in a polyurethane resin foam. Since the polypropylene resin foam is harder and has a lower density than the polyurethane resin foam, the hardness can be partially different while reducing the weight of the vehicle seat pad, and since the through holes are provided, the polyurethane Hard to separate from the resin foam.

Japanese Unexamined Patent Publication No. 2010-125138 Japanese Unexamined Patent Publication No. 2012-206403

In the vehicle seat pad described in Patent Document 1, it may be desired to replace the back layer pad with a polypropylene resin foam in order to further reduce the weight. In such a case, since the polypropylene resin foam has inferior adhesion to the polyurethane resin foam as compared with the AS resin foam, the surface of the polypropylene resin foam is textured. In such grain processing, it is said that a lot of man-hours are required to find a processing condition that achieves both adhesion of the polyurethane resin to the foam and mold removal property from the mold when molding the polypropylene resin foam. There was a problem.

The present invention has been devised in view of these points. It is an object of the present invention to provide a vehicle seat pad having a hard / soft two-layer structure in which each layer is hard to peel off.

The first invention of the present invention is a seat pad for a vehicle, which is harder and has a lower density than the surface pad on the seating surface side and the surface pad integrated in a layer on the opposite side of the seating surface of the surface pad. The back layer pad is provided, and the cross section of the back layer pad extends in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied and has a cross section on the surface in contact with the surface layer pad. A plurality of grooves, which are substantially U-shaped and extend in a direction substantially parallel to the direction in which the seating occupant's seat pressure is applied, are provided so as to open toward the pad side, and a part of the surface layer pad penetrates into the grooves. The surface pad and the back pad are integrated in this state.

According to the first invention, among the interfaces between the front layer pad and the back layer pad, a plurality of interfaces on the back layer pad extend in a direction substantially parallel to the direction in which the seating pressure of the seated occupant to which the peeling force is easily applied is applied. The surface pad and the back pad are integrated in a state where a groove is formed and a part of the surface pad penetrates into the groove. As a result, at the interface extending in the direction in which the seating pressure of the seated occupant is applied, the contact area between the front layer pad and the back layer pad is increased, and both are less likely to be peeled off.

The second invention of the present invention is the first invention, wherein the cross section of the groove has an expanded portion in which the width of the groove is wider than the opening on the groove bottom side opposite to the opening. It is characterized by that.

According to the second invention, a part of the surface layer pad that has penetrated into the groove is more difficult to come off from the groove, so that the surface layer pad and the back layer pad are more difficult to peel off.

According to the third aspect of the present invention, in the first invention or the second invention, the seating occupant's seating pressure on the back layer pad extends in a direction substantially perpendicular to the direction in which the seating pressure is applied, and the surface abuts on the surface pad. Is a substantially U-shaped cross section that opens toward the surface pad side, and is provided with a plurality of lateral grooves extending in a direction substantially perpendicular to the direction in which the seating occupant's sitting pressure is applied. The surface pad and the back pad are integrated with each other in a state where a part of the surface pad has penetrated.

According to the third invention, at the interface between the front layer pad and the back layer pad, a plurality of lateral grooves are formed in the back layer pad even at the interface extending in a direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied. The surface pad and the back pad are integrated with a part of the surface pad invading the surface. As a result, even at the interface extending in a direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied, the contact area between the front layer pad and the back layer pad is increased, and both are less likely to be peeled off.

According to the fourth aspect of the present invention, in any one of the first invention to the third invention, the back layer pad has a cylindrical penetration extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied. A hole or a cylindrical bottomed hole is provided, and the surface pad and the back layer pad are integrated in a state where a part of the surface pad has penetrated into the through hole or the bottom hole. It is characterized by.

According to the fourth invention, since the front layer pad and the back layer pad are also in contact with each other on the outer peripheral wall surface of the through hole or the bottomed hole of the back layer pad, the contact area is increased and both are more difficult to peel off.

It is a perspective view of the automobile seat to which the cushion pad which concerns on one Embodiment of this invention is applied. It is an exploded perspective view of a cushion pad. It is a top view of the back layer pad of a cushion pad. FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG. It is sectional drawing which shows by cutting along the VV line of FIG. It is sectional drawing which shows by cutting along the VI-VI line of FIG. It is a partial perspective view of the back layer pad of a cushion pad. It is a figure which shows the VIII part of FIG. 7 enlarged. It is a figure which shows the IX part of FIG. 7 enlarged.

1 to 9 show an automobile seat 1 to which a cushion pad according to an embodiment of the present invention is applied. In each figure, the arrows indicate the directions of the automobile and the automobile seat 1 when the automobile seat 1 is attached to the floor F of the automobile. In the following description, the description regarding the direction shall be made with reference to this direction.

As shown in FIG. 1, the automobile seat 1 is a three-seater bench seat and has a length in the left-right direction substantially the same as the width of the passenger compartment. The automobile seat 1 includes a seat cushion 2 that supports the buttocks and thighs of the seated occupant, and a seat back 3 that supports the back of the seated occupant. In the seat cushion 2 and the seat back 3, the lower end portion of the seat back 3 is in contact with the rear end portion of the seat cushion 2, and the floor F is in a state where the seat back 3 is erected with respect to the seat cushion 2. The seat 1 for automobiles is configured by being attached to the seat 1. The seat back 3 is a normal one, and has a structure in which a back pad, which is a foam of polyurethane resin, is covered with a back cover, which is a skin material. The upper surface of the seat cushion 2 and the front surface of the seat back 3 are seating surfaces with which the body of the seated occupant abuts.

As shown in FIG. 1, the seat cushion 2 has a pair of left and right seat portions 2S and a central seat portion 2C arranged between the left and right seat portions 2S. Further, the seat cushion 2 has a cushion pad 10 which is a cushion material, and a cushion cover 20 which is a skin material covering the surface of the cushion pad 10 on the seated occupant side. Here, the cushion pad 10 corresponds to the "seat pad for a vehicle" in the claims.

As shown in FIGS. 2 to 6, the cushion pad 10 includes a surface pad 11 arranged on the front side on the seated occupant side and a back layer pad 12 arranged on the back side opposite to the seated occupant on the surface pad 11. And have. The surface pad 11 is formed of urethane foam obtained by foam molding a polyurethane resin, and its density is set to, for ^{example, about 0.045 ± 0.005 g / cm 3.} The surface pad 11 has a front surface portion 11a having a shape and an area that occupies the entire surface of the cushion pad 10 on the seating surface side, and a back surface portion 11b that forms a surface opposite to the seating surface.

As shown in FIGS. 2 to 9, the back layer pad 12 is a bead foam molded product of an olefin resin such as polypropylene or polyethylene, and its density is set to about ^{0.03 g / cm 3.} The back layer pad 12 is formed as a hard one having a lower density and a higher elastic modulus than the surface layer pad 11.

The back layer pad 12 has a front side portion 12a that abuts a part of the back surface portion 11b of the surface layer pad 11, and a back side portion 12b that forms a surface opposite to the seating surface. The back layer pad 12 is provided with a through-opening hole 12c that penetrates in the vertical direction in the central portion of the left, right, front, and rear when viewed from above. The length of the through opening 12c in the front-rear direction is formed longer in the portion corresponding to the left and right seat portions 2S than in the portion corresponding to the central seat portion 2C. That is, the back layer pad 12 is formed in a substantially frame shape along the outer peripheral edge portion of the cushion pad 10 when viewed from above. As a result, when the surface layer pad 11 is integrally foam-molded with respect to the back layer pad 12, a part of the surface layer pad 11 penetrates into the through hole 12c of the back layer pad 12 and is molded and cured. A part of 11b forms the back surface of the cushion pad 10.

As shown in FIGS. 2 to 7, the back layer pads 12 include a pair of left and right side portions 12d extending in the front-rear direction, a front portion 12e connecting the front ends of the left and right side portions 12d, and left and right side portions 12d. It has a rear portion 12f that connects the rear end portions. The side portion 12d has an outer wall surface portion 12d1 having a shape along the outer shape of the left and right side portions of the cushion pad 10 in the top view, and an inner wall surface portion 12d2 corresponding to the left and right peripheral edges of the through opening hole 12c in the top view. The inner wall surface portion 12d2 extends in the front-rear direction in parallel with the outer wall surface portion 12d1 on the rear side, bends inward in the seat width direction toward the front side, and bends outward in the seat width direction toward the front side. It is formed like this. That is, the side portion 12d is formed with a side protruding portion 12d3 that protrudes inward in the seat width direction with a large width in the left-right direction at a portion slightly rearward from the front end portion in the top view. This is because, in the left and right seat portions 2S, the buttock support portion 11c to which a large seating pressure is applied elastically supports the seated occupant only with the surface pad 11, and the thigh support portion 11d to which a large seating pressure is not applied is the back. The layer pad 12 is added to support the cushion pad 10, and the weight of the cushion pad 10 is reduced. Here, the outer wall surface portion 12d1 and the inner wall surface portion 12d2 each correspond to "a surface extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied and in contact with the surface layer pad" in the claims. Further, the outer wall surface portion 12d1 and the inner wall surface portion 12d2 are formed so as to extend in the vertical direction. Here, the vertical direction corresponds to the "direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied" in the claims.

As shown in FIGS. 3, 7 and 8, the outer wall surface portion 12d1 of the side portion 12d has a fitting groove 12d11 having a substantially Ω (omega) shape having an opening on the outside in the sheet width direction and extending in the vertical direction. , Five are provided at substantially equal pitches along the outer wall surface portion 12d1. More specifically, in the cross section of the fitting groove 12d11, as shown in FIG. 8, each left end portion (inner end portion in the seat width direction) of the straight line portion 12d111 extending in parallel in the left-right direction facing each other is formed by the arc portion 12d112. It has a connected shape, and the distance between the straight portions 12d111 in the front-rear direction is shorter than the diameter of the arc portions 12d112. When the surface layer pad 11 is integrally molded with the back layer pad 12, a part of the surface layer pad 11 penetrates into the fitting groove 12d11 and hardens, and the surface layer pad 11 portion of the portion corresponding to the arc portion 12d112 is a straight line. It becomes difficult to come off from the back layer pad 12 of the portion corresponding to the portion 12d111. As a result, the surface layer pad 11 can be firmly connected to the back layer pad 12 on the outer wall surface portion 12d1. The inner wall surface portion 12d2 of the side portion 12d is fitted with a substantially Ω (omega) shape extending in the vertical direction in a portion extending in the front-rear direction in parallel with the outer wall surface portion 12d1 on the rear side in a cross section having an opening inside in the seat width direction. Two joint grooves 12d21 are provided. The fitting groove 12d21 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 in the inner wall surface portion 12d2 by the same mechanism as the fitting groove 12d 11. Further, in the side portion 12d, cylindrical through holes 12d4 penetrating in the vertical direction substantially in the central portion in the left-right direction are arranged in a straight line at equal pitches in the front-rear direction. The diameter of the through hole 12d4 is about the same as the diameter of the arc portion 12d112. As a result, when the surface layer pad 11 is integrally molded with the back layer pad 12, a part of the surface layer pad 11 penetrates into the through hole 12d4 and hardens, and the back surface portion 11b of the surface layer pad 11 and the back layer pad 12 It is possible to increase the connecting strength of the front side portion 12a of the surface 12a with respect to the force in the out-of-plane direction and the in-plane direction. Here, the fitting groove 12d11 and the fitting groove 12d21 correspond to the "groove" in the claims. Further, the straight portion 12d111 corresponds to the "opening portion" of the claims, and the arc portion 12d112 corresponds to the "expansion portion" of the claims.

As shown in FIGS. 2 to 7, the front portion 12e includes a front wall surface portion 12e1 extending substantially linearly in the left-right direction along the outer shape of the front portion of the cushion pad 10 in the top view, and a through opening 12c in the top view. It has a rear wall surface portion 12e2 corresponding to a peripheral edge portion on the front side of the above. The rear wall surface portion 12e2 extends in the left-right direction substantially parallel to the front wall surface portion 12e1 at the portion corresponding to the left and right seat portions 2S, and projects rearward in an isosceles trapezoidal shape in the upper view at the portion corresponding to the central seat portion 2C. It is formed so as to extend. That is, the front portion 12e is formed with a front protruding portion 12e3 that is short in the front-rear direction on both the left and right ends on the left and right ends and is large in the front-rear direction at the center and projects rearward. .. This is because, in the central seat portion 2C, the buttock support portion 11e to which a large seating pressure is applied elastically supports the seated occupant only with the surface pad 11, and the thigh support portion 11f to which a large seating pressure is not applied is the back. The layer pad 12 is added to support the cushion pad 10, and the weight of the cushion pad 10 is reduced. The front side portion 12a of the front portion 12e is formed so as to extend in the front-rear direction. Here, the front-rear direction corresponds to the "direction substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied" in the claims.

As shown in FIGS. 3, 7 and 9, the front side portion 12a of the front portion 12e has a fitting groove 12e4 having a cross section having an opening upward and extending in the front-rear direction in a substantially Ω (omega) shape. Two are provided in the portion corresponding to the portion 2S, and three are provided in the portion corresponding to the central seat portion 2C. The fitting groove 12e4 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 in the front side portion 12a of the front portion 12e by the same mechanism as the fitting groove 12d 11. When the back layer pad 12 is bead-foamed and demolded, the demolding direction is the vertical direction, so the mold portion corresponding to the arc portion 12e42 of the fitting groove 12e4 is the back layer of the portion corresponding to the straight portion 12e41. It may be difficult to remove the mold from the pad 12. In such a case, the diameter of the arc portion 12e42 may be reduced or the cross-sectional shape of the fitting groove 12e4 may be substantially U-shaped. In this way, the strength in the vertical (out-of-plane) peeling direction of the back surface portion 11b of the surface layer pad 11 with respect to the front side portion 12a of the front portion 12e is slightly reduced, but the connection strength with respect to the in-plane force is fitted. It is maintained at the same level as the joint groove 12e4. Here, the fitting groove 12e4 corresponds to the "horizontal groove" in the claims.

As shown in FIGS. 2 to 7, the rear portion 12f includes a rear wall surface portion 12f1 extending in the left-right direction along the outer shape of the rear portion of the cushion pad 10 in the top view, and a rear peripheral portion of the through opening 12c in the top view. It has a front wall surface portion 12f2 corresponding to the above. The rear wall surface portion 12f1 and the front wall surface portion 12f2 extend in parallel in the left-right direction at the portion corresponding to the left and right seat portions 2S and the portion corresponding to the center seat portion 2C, and the portion corresponding to the left and right seat portions 2S and the center seat portion 2C. It curves and extends in parallel toward the front between the parts corresponding to. That is, the rear portion 12f is formed with a curved portion 12f3 that curves forward and protrudes between the portion corresponding to the left and right seat portions 2S and the portion corresponding to the central seat portion 2C in the top view. The curved portion 12f3 is for forming a recess for arranging a buckle of a seat belt (not shown). The rear wall surface portion 12f1 and the front wall surface portion 12f2 are formed so as to extend in the vertical direction. Here, the rear wall surface portion 12f1 and the front wall surface portion 12f2 each correspond to "a surface extending in a direction substantially parallel to the direction in which the seating occupant's seat pressure is applied and in contact with the surface layer pad" in the claims. ..

As shown in FIGS. 3 and 7, in the rear wall surface portion 12f1 of the rear portion 12f, a fitting groove 12f11 having a cross section having a substantially Ω (omega) shape having an opening at the rear and extending in the vertical direction is provided in the left and right seat portions 2S. Three are provided at the corresponding parts. The fitting groove 12f11 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 in the rear wall surface portion 12f1 of the rear portion 12f by the same mechanism as the fitting groove 12d 11. Further, the front wall surface portion 12f2 of the rear portion 12f is provided with two fitting grooves 12f21 having a cross section having an opening in the front and extending in the vertical direction in a substantially Ω (omega) shape at a portion corresponding to the left and right seat portions 2S. ing. The fitting groove 12f21 is a groove having substantially the same cross section as the fitting groove 12d11. The surface layer pad 11 can be firmly connected to the back layer pad 12 in the front wall surface portion 12f2 of the rear portion 12f by the same mechanism as the fitting groove 12d 11. Here, the fitting groove 12f11 and the fitting groove 12f21 correspond to the "groove" in the claims.

As shown in FIGS. 2 to 6, iron wire frames 13 are attached to the inside of the front, rear, left, and right outer peripheral edges of the back layer pad 12. The mounting method is to insert the corresponding portion of the frame 13 into the groove portion 12g having a substantially U-shaped cross section that opens downward at a plurality of predetermined positions on the back side portion 12b of the back layer pad 12. It is done by. In this state, the surface pad 11 is integrally foam-molded, so that the frame 13 is integrated with the surface pad 11 together with the back pad 12, and the cushion pad 10 is formed. The frame 13 has a frame portion 13a having an outer shape when viewed from above, a pair of left and right bridging portions 13b, and a plurality of locking portions 13c. The frame portion 13a is formed in a substantially rectangular shape along the shape of the back layer pad 12 in a top view by assembling and fixing a plurality of wire materials in an endless manner. Between the front portion extending in the left-right direction and the rear portion extending in the left-right direction of the frame portion 13a, a pair of left-right bridging portions 13b are bridged and fixed at positions substantially symmetrical to each other in the frame portion 13a to increase the rigidity of the frame 13. I have secured it. The locking portions 13c are portions for fixing the frame 13 to the floor F, and are provided at two at the front portion and two at the rear portion of the frame portion 13a.

The above-described embodiment configured as described above has the following effects. Of the interfaces between the surface pad 11 and the back pad 12, the peeling force is particularly likely to be applied to the outer wall surface portion 12d1 which is an interface extending in the vertical direction, which is a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied. , Inner wall surface portion 12d2, rear wall surface portion 12f1, front wall surface portion 12f2, and the like. In such a wall surface portion, a plurality of fitting grooves 12d11, fitting grooves 12d21, fitting grooves 12f11, and fitting grooves 12f21 are provided, respectively. Each fitting groove is formed so as to extend in the vertical direction, and the surface layer pad 11 and the back layer pad 12 are integrated in a state where a part of the surface layer pad 11 has penetrated into the fitting groove. As a result, at the interface extending in the direction in which the seating pressure of the seated occupant is applied, the contact area between the surface layer pad 11 and the back layer pad 12 increases, and both are less likely to come off.

Further, the cross section of the fitting groove 12d11, the fitting groove 12d21, the fitting groove 12f11, and the fitting groove 12f21 is substantially Ω (omega), and the groove width is opposite to the opening from the straight portion 12d111 which is the opening. It is formed so as to expand in the arc portion 12d112 which is an expansion portion on the groove bottom side of the above. As a result, a part of the surface layer pad 11 that has penetrated into the fitting groove 12d11, the fitting groove 12d21, the fitting groove 12f11, and the fitting groove 12f21 is more difficult to come out from the groove, so that the surface layer pad 11 and the back layer pad 12 Is more difficult to peel off.

Further, the cross section of the front side portion 12a of the front portion 12e, which is the interface extending in the front-rear direction which is a direction substantially perpendicular to the direction in which the seating occupant's seat pressure is applied, among the interfaces between the surface layer pad 11 and the back layer pad 12. Is provided with a fitting groove 12e4 extending in the front-rear direction in a substantially Ω (omega) shape having an opening at the top. Then, the surface layer pad 11 and the back layer pad 12 are integrated in a state where a part of the surface layer pad 11 has penetrated there. As a result, also in the front side portion 12a of the front portion 12e, the contact area between the surface layer pad 11 and the back layer pad 12 increases, and it becomes difficult to come off and both of them are hard to come off. In addition, the side portion 12d of the back layer pad 12 is provided with a plurality of cylindrical through holes 12d4 in the vertical direction, which is a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied. Then, the surface layer pad 11 and the back layer pad 12 are integrated in a state where a part of the surface layer pad 11 has penetrated there. As a result, in the side portion 12d, the contact area between the surface layer pad 11 and the back layer pad 12 increases, and it becomes difficult for the surface layer pad 11 and the back layer pad 12 to move relative to each other in the out-of-plane direction and the in-plane direction, so that they are more difficult to peel off.

Although the specific embodiments have been described above, the present invention is not limited to those configurations, and various changes, additions, and deletions can be made without changing the gist of the present invention. For example, the following can be mentioned.

1. 1. In the above embodiment, the present invention is applied to the cushion pad 10 of the automobile seat 1, but the present invention can also be applied to the back pad of the seat back 3 as a two-layer structure of a front layer pad and a back layer pad. Further, it may be applied to a seat pad for a vehicle mounted on an airplane, a ship, a train or the like.

2. In the above embodiment, the back layer pad 12 is made of an olefin-based bead-foamed resin such as polypropylene or polyethylene, but the present invention is not limited to this, and the bead-foaming of a styrene-based resin or a composite resin of a styrene-based resin and an olefin-based resin is not limited to this. It can also be made of resin.

3. 3. In the above embodiment, the cross sections of the fitting groove 12d11, the fitting groove 12d21, the fitting groove 12f11, and the fitting groove 12f21 are all formed in a substantially Ω (omega) shape, but a part thereof is formed in a substantially U shape. Alternatively, the whole may be formed in a substantially U shape.

4. In the above embodiment, the cross section of the fitting groove 12e4 is formed in a substantially Ω (omega) shape, but it may be formed in a substantially U shape. Further, the fitting groove 12e4 may be provided on the side portion 12d or the front side portion 12a of the rear portion 12f. Further, the extending direction of the fitting groove 12e4 is not limited to the front-rear direction but may be the left-right direction, or any direction as long as it is substantially perpendicular to the direction in which the seating pressure of the seated occupant is applied. ..

5. In the above embodiment, the through hole 12d4 is provided in the side portion 12d, but may be provided in the front portion 12e or the rear portion 12f. Further, the through hole 12d4 is not limited to a cylindrical shape, and may have a cylindrical shape having a polygonal cross section. Further, it may have a bottomed cylinder shape even if it does not penetrate vertically.

1 Automotive seat 2 Seat cushion 10 Cushion pad (Vehicle seat pad)
11 Surface pad 12 Back layer pad 12d1 Outer wall surface 12d11 Fitting groove (groove)
12d111 Straight line (opening)
12d112 Arc part (expansion part)
12d2 Inner wall surface 12d21 Fitting groove (groove)
12e4 fitting groove (horizontal groove)
12f1 Rear wall surface 12f11 Fitting groove (groove)
12f2 Front wall surface 12f21 Fitting groove (groove)

Claims (3)

It ’s a vehicle seat pad.
It is provided with a surface pad on the side of the seating surface and a back layer pad that is harder and has a lower density than the surface pad that is integrated in a layer on the opposite side of the seating surface when the surface pad is molded.
A substantially U-shape having a cross section opening toward the surface pad on the surface of the back pad that extends in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied and that comes into contact with the surface pad. A plurality of grooves extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied are provided.
The surface pad and the back pad are integrated in a state where a part of the surface pad has penetrated into the groove .
The cross section of the groove is a seat pad for a vehicle formed by having an expanded portion in which the groove width is widened on the groove bottom side opposite to the opening from the opening. In claim 1, a cross section of the back layer pad extends toward the side of the surface pad while extending in a direction substantially perpendicular to the direction in which the seating occupant's seat pressure is applied and in contact with the surface pad. A plurality of lateral grooves extending in a direction substantially perpendicular to the direction in which the seating occupant's sitting pressure is applied are provided in a substantially U shape.
A vehicle seat pad in which the surface pad and the back pad are integrated in a state where a part of the surface pad has penetrated into the lateral groove. In claim 1 or 2, the back layer pad is provided with a cylindrical through hole or a tubular bottomed hole extending in a direction substantially parallel to the direction in which the seating pressure of the seated occupant is applied.
A vehicle seat pad in which the surface pad and the back pad are integrated in a state where a part of the surface pad has penetrated into the through hole or the bottom hole.

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