JP2007084039A - Seat pad for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance sitting comfortableness in a seat pad in which a recess is provided from a bottom surface of a pad body toward above and a loading body is loaded in the recess. <P>SOLUTION: A cushion pad of the seat pad 10 for the vehicle comprises the pad body 20; the loading body 30 fitted to the recess 24 of the pad body 20; and a hard layer 40 fixed to a ceiling surface of the recess 24. A large number of projections 31 are provided on an upper surface of the loading body 30 and a gap between the projections 31 each other becomes a gap 32. The gap 32 is communicated with a seating surface through a hole 27 and is communicated with a seating surface of the loading body 30 through a through hole 33. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle seat pad, and more particularly to a vehicle seat pad including a pad body provided with a recess recessed upward from the bottom surface, and an insertion body inserted into the recess. . The present invention also relates to a vehicle seat pad provided with means for improving the seating feeling.

  In JP-A-11-34710 and JP-A-2005-59646, a recess is provided upward from the bottom surface of the pad main body, and a slab is inserted into the recess, and a sensor is provided on the upper surface portion of the slab. A seat with a seating sensor installed is described.

In Japanese Patent Application Laid-Open No. 2004-255208, in a seat cushion in which a seat cushion pad made of urethane foam is installed on a pan frame, a hole is provided in the pan frame below the sciatic abutment portion, thereby providing a sciatic abutment portion. It is described that the seating feeling in the vicinity is softened.
JP 11-34710 A JP 2005-59646 A Japanese Patent Laid-Open No. 2004-255208

  The present invention is for a vehicle in which a recess is provided upward from the bottom surface of the pad main body as described in JP-A-11-34710 and JP-A-2005-59646, and an insertion body is inserted into the recess. The first object of the seat pad is to improve sitting comfort.

  A second object of the present invention is to provide a vehicle seat pad that can improve the seating feeling without using a specially shaped pan frame with holes.

  The vehicle seat pad according to claim 1 is a vehicle seat pad comprising: a pad main body provided with a recess recessed upward in the bottom surface portion; and an insertion body inserted into the recess. In addition, a gap is provided between the ceiling surface of the recess and the upper surface of the insertion body, and a hard layer is provided along the ceiling surface of the recess, penetrating the pad body and the hard layer. In addition, a hole for communicating the gap with the seating surface of the pad main body is provided.

  According to a second aspect of the present invention, the vehicle seat pad according to the first aspect is characterized in that a number of protrusions are provided on the upper surface of the insertion body, and the gaps are formed between the protrusions.

  A vehicle seat pad according to a third aspect is the vehicle seat pad according to the first aspect, wherein a plurality of grooves are provided on the upper surface of the insertion body, and the inside of each groove is the gap.

  According to a fourth aspect of the present invention, the vehicle seat pad according to the third aspect is characterized in that the groove extends in the left-right direction or the front-rear direction of the vehicle seat pad.

  A vehicle seat pad according to a fifth aspect is the vehicle seat pad according to any one of the first to fourth aspects, wherein a plurality of the holes are provided.

  According to a sixth aspect of the present invention, there is provided a vehicle seat pad according to any one of the first to fifth aspects, wherein a communication portion that communicates the gap with the bottom surface of the vehicle seat pad is provided.

  A vehicle seat pad according to a seventh aspect of the present invention is the vehicle seat pad according to the sixth aspect, wherein the communicating portion passes through the insertion member.

  A vehicle seat pad according to an eighth aspect of the present invention is the vehicle seat pad according to any one of the first to seventh aspects, wherein the gap is provided below the bottom of the bottom.

  The vehicle seat pad according to a ninth aspect is the vehicle seat pad according to the eighth aspect, characterized in that the air holes are arranged on both right and left sides of the bottom of the bottom.

  A vehicle seat pad according to a tenth aspect is the vehicle seat pad according to any one of the first to ninth aspects, wherein the hard layer includes a sheet-like material and a resin impregnated in the sheet-like material. .

  The vehicle seat pad according to claim 11 is a vehicle seat pad comprising: a pad body provided with a recess on a passenger side surface or a back surface opposite to the passenger side; and an insertion body inserted into the recess. The hard layer for adjusting the deflection at the time of sitting is present on at least a part of the mating surface of the recess and the insert.

  The vehicle seat pad according to claim 12 is the vehicle seat pad according to claim 11, wherein the hard layer is present for a small deflection portion that makes the deflection at the time of sitting relatively small, and a large deflection portion that makes the deflection at the time of sitting relatively large. The hard layer is absent.

  A vehicle seat pad according to a thirteenth aspect is the vehicle seat pad according to the twelfth aspect, wherein the large deflection portion is at least one of a lower thigh and a sciatic abutment portion.

  The vehicle seat pad according to claim 14 is the vehicle seat pad according to any one of claims 11 to 13, wherein the vehicle seat pad is made of foamed resin, and the hard layer is made of a sheet-like material impregnated with resin at the time of foaming. It is characterized by.

  According to a fifteenth aspect of the present invention, there is provided the vehicle seat pad according to the fourteenth aspect, wherein the sheet-like material is made of a non-woven fabric, a woven fabric, a coarse wool felt, a cold chill, a walif or a breathable porous resin foam. .

  A vehicle seat pad according to a sixteenth aspect is the vehicle seat pad according to the fourteenth or fifteenth aspect, wherein the hard layer is formed integrally with the pad main body.

  A vehicle seat pad according to a seventeenth aspect is the vehicle seat pad according to the fourteenth or fifteenth aspect, wherein the hard layer is formed integrally with the insertion member.

  In the vehicle seat pad according to any one of claims 1 to 10, the insertion body is inserted into the recess in the bottom surface of the pad body, and a gap is provided between the ceiling surface of the recess and the upper surface of the loading body. Since the air gap communicates with the seating surface by holes, the air in the air gap flows out smoothly and reduces the volume when seated, so the seating feel becomes soft and the seating comfort is comfortable. It will be a thing.

  In particular, when the inside of the gap is provided below the bottom of the butt, the sitting comfort is sufficiently comfortable.

  When the gap is formed by providing a large number of protrusions on the upper surface of the insertion body, the entire gap between the upper surface of the loading body and the ceiling surface of the recess is in communication with each other. Air is easily supplied and discharged. Further, even when the vertical spacing is reduced in a part of the gap due to the seating, the other part of the gap exhibits a sufficient ventilation function. Therefore, when heating or cooling is performed by flowing hot air or cold air from the lower side of the seat through the gap to the upper surface of the seat as will be described later, the hot air or cold air is sufficiently circulated even when seated.

  A plurality of grooves may be provided on the upper surface of the insertion body, and the inside of the grooves may be a gap. In this case, the same effect as the case where many protrusions are provided is show | played by communicating each groove | channel. The groove extending in the front-rear direction or the left-right direction of the seat pad is suitable for improving the seating comfort. If the grooves are communicated with each other, the air blowing effect is not hindered. Since the grooved surface has a relatively low rigidity, the higher the rigidity of the surface to be fitted, the higher the holding force when fitted, and the more difficult it is to drop off.

  By providing a plurality of the holes, air can smoothly enter and leave the gap.

  The air gap may be communicated with the bottom surface of the seat pad via the communication portion. In this case, when hot air or cold air is supplied to the communication part from an air conditioner or the like, the hot air or cold air flows upward from the seat surface through the air holes, and the passenger can be heated or cooled.

  In order to make this heating or cooling comfortable, it is preferable to provide holes on the left and right sides of the bottom of the bottom.

  The hard layer is preferably composed of a cloth-like body and a resin impregnated in the cloth-like body. If this cloth-like body is placed in the molding die for the pad main body, the resin constituting the pad main body is impregnated, and the hard layer is molded integrally with the pad main body.

  In the vehicle seat pad according to any one of claims 11 to 17, a hard layer is provided on at least a part of the mating surface between the recess of the pad main body and the insertion body to adjust the deflection at the time of sitting. Therefore, by placing a hard layer on a part that relatively reduces the deflection at the time of sitting without placing a hard layer on a part that relatively increases the deflection at the time of sitting, for example, the lower thigh or the sciatic contact part, It is possible to soften the contact with the lower thigh and the sciatic abutment part, and to give the occupant a hard seating feeling at other parts, thereby improving the body holding ability.

  This hard layer can be easily formed by attaching a sheet-like material to the inner surface of a mold when foam-molding a vehicle seat pad and impregnating the sheet-like material with resin during molding. . As the sheet-like material, a nonwoven fabric, a woven fabric, a coarse felt, a cold water, a walif or a breathable porous resin foam can be used.

  Hereinafter, embodiments will be described with reference to the drawings.

  1 is a plan view of a vehicle seat pad according to an embodiment of the invention of claims 1 to 10, and FIGS. 2 and 3 are sectional views taken along lines II-II and III-III of FIG. It is.

  The cushion pad of the vehicle seat pad 10 includes a pad main body 20, an insertion body 30 fitted in the recess 24 of the pad main body 20, and a hard layer 40 provided along the ceiling surface of the recess 24. A hole 27 is provided so as to penetrate the pad main body 20 and the hard layer 40. A vehicle seat pad 10 is configured by attaching an epidermis to the cushion pad.

  The pad main body 20 includes a bottom part 21, a thigh part 22, a side part 23, and a bottom recess 24.

  The recess 24 is recessed upward from the bottom surface of the pad body 20 below the bottom part 21. In this embodiment, the planar view shape of the recess 24 and the insertion body 30 is a square, but is not limited thereto.

  On the upper surface of the pad main body 20, there are provided a longitudinal groove 25 and a lateral width 26.

  In the case where a soft urethane having a thickness of 5 mm or more or a similar material is used as a cover material on a vehicle seat pad that places importance on cushioning or a seat pad, the pad body 20 is made of a low-density material and is inserted. It is preferable to use a high performance material as a constituent material of the filler 30.

In this case, the constituent material of the seat pad body 20 is preferably a polyurethane foam having a core density of 25 to 50 kg / m ³ and a 25% hardness of 15 to 25 kgf / φ200, and the insert 30 has a core density of 45 to 70 kg / m ³ , A polyurethane foam having a 25% hardness of 16 to 30 kgf / φ200 is desirable.

On the other hand, in the case of a seat pad that requires a soft feeling on the surface or a seat pad that aims to improve the initial seating feeling, the constituent material of the pad body 20 includes a core density of 40 to 70 kg / m ³ , 25% hardness of 8 A polyurethane foam having a core density of 25 to 55 kg / m ³ and a 25% hardness of 16 to 30 kgf / φ200 is preferable.

  In this vehicle seat pad, the length of the recess 24 and the insertion body 30 in the front-rear direction is 150 to 500 mm, particularly 200 to 400 mm, and the depth of the recess 24 is the seat pad 20 in the bottom part 21. The thickness is preferably 30 to 90%, particularly 60 to 80%.

  In this embodiment, the insertion body 30 and the recess 24 have an inversely tapered shape that decreases toward the lower side, whereby the insertion body 30 is firmly held in the recess 24. In addition, the insertion body 30 may be adhere | attached on the inner surface of the recess 24, and may be fastened with a suitable fastener.

  In this embodiment, the ceiling surface of the recess 24 of the pad main body 20 is flat. The holes 27 are provided on the left and right sides of the bottom of the pad body 20. In this embodiment, a plurality of holes 27 are provided on each of the left and right sides of the bottom of the bottom, but may be provided one by one.

  Since the seat pad is a cushion pad with an epidermis attached, the air holes 27 are indicated by broken lines in FIG. This skin is made of a breathable material such as a woven fabric.

A large number of protrusions 31 are provided on the upper surface of the insertion body 30. Each protrusion 31 has a conical shape, but may have a pyramid shape. Moreover, it does not have to be conical. In addition, when making the protrusion 31 into a cone shape, it is preferable that the base portion has a size of about 100 to 3000 mm ² and a height of about 10 to 50 mm.

  A gap 32 is formed between the protrusions 31.

  A through hole 33 is provided at the center of the insertion body 30 as a communicating portion that penetrates vertically. In this embodiment, only one through hole 33 is provided, but a plurality of through holes 33 may be provided.

  The peripheral edge 34 on the upper surface of the insertion body 30 is a flat surface having the same height as the upper end of the protrusion 31. The insertion body 30 is fitted into the recess 24 so that the upper end of the protrusion 31 and the peripheral edge 34 abut against the ceiling surface of the recess 24. When the insertion body 30 is mounted, the gap 32 communicates with both the hole 27 and the through hole 33.

  In addition, when the hard layer is formed by attaching a nonwoven fabric or other breathable material to the inner surface of the mold and impregnating the resin during molding, gas will be released through the breathable material during foam molding, and the product It is possible to prevent the occurrence of defects such as air accumulation.

  In this embodiment, the hard layer 40 is a sheet-like material such as a cloth placed in a mold for molding the pad main body 20 and is impregnated with a urethane resin when the pad main body 20 is molded to be integrated with the pad main body 20. It has been made. As the sheet-like material of the hard layer 40, in addition to a cloth-like material such as a non-woven fabric or a woven fabric, coarse-felt felt, cold water, walif or breathable resin foam (for example, slab urethane) can be used.

  In the present invention, instead of using the cloth-like body, a hard plate made of a synthetic resin or the like formed separately or a press felt may be used, and this may be used between the insertion body 30 and the ceiling surface of the recess 24. It may be bonded to at least one, or may simply be interposed between the two without bonding.

  In the vehicle seat pad 10 configured as described above, when the occupant is seated, the protrusion 31 is deformed so as to be compressed, so that the seating feeling is soft. In addition, since the hard layer 40 is provided, the projection 31 is not sensed on the occupant's buttocks and the seating feeling is good. Moreover, some protrusions 31 are not crushed locally.

  In this embodiment, the air gap 32 communicates with the outside through the air holes 27 and the through holes 33, so that air smoothly enters and exits the air gap 32 during seating and separation.

  In this embodiment, the hard layer 40 covers the entire surface other than the air holes 27 in the ceiling surface of the recess 24. Accordingly, the gap in the gap 32 enters and exits through the air holes 27 only. That is, the inside of the urethane foam of the pad body 20 is not vented. Thereby, it is possible to improve vibration absorption.

  In this embodiment, the through hole 33 and the hole 27 communicate with each other through the gap 32. Therefore, when hot air or cold air is supplied into the through-hole 33 from an air conditioner (not shown) or the like, the hot air or cold air flows upward from the air holes 27, and the passenger can be heated or cooled.

  In this embodiment, the protrusion 31 is provided on substantially the entire surface other than the peripheral edge portion 34 on the upper surface of the insertion body 30, and the gap 32 communicates with substantially the entire upper surface of the insertion body 30. Therefore, even when a part of the gap is compressed by the load of the seated person, the hot air or the cold air can be smoothly circulated from the through hole 33 to the hole 27.

  In the embodiment of FIGS. 1 to 3, the protrusion 31 is provided on the upper surface of the insertion body 30, but a plurality of grooves extending in the left-right direction or the front-rear direction are provided on the upper surface of the insertion body 30. The inside of the groove may be a gap. In this case, it is preferable that the grooves communicate with each other.

  Hereinafter, embodiments of the invention of claims 11 to 17 will be described with reference to FIGS.

  4 is a plan view of the vehicle seat pad according to the embodiment of the invention of claims 11 to 17, and FIGS. 5 and 6 are sectional views taken along lines VV and VI-VI in FIG. FIG. 7 is a perspective view of a sheet-like material. FIG. 8 is a perspective view of an insertion member used in another embodiment of FIGS.

  The cushion pad of the vehicle seat pad 10A includes a pad main body 20A, an insertion body 30A fitted in the recess 24 of the pad main body 20A, and a hard layer 50 provided along the ceiling surface of the recess 24. It consists of. A vehicle seat pad 10 </ b> A is configured by attaching an outer skin to the cushion pad.

  Similar to the pad main body 20, the pad main body 20 </ b> A has a bottom part 21, a thigh lower part 22, a side part 23, and a bottom recess 24.

  The recess 24 is recessed upward from the bottom surface of the pad body 20 below the bottom part 21. In this embodiment, the planar view shape of the recess 24 and the insertion body 30A is a square, but is not limited thereto.

  On the upper surface of the pad main body 20A, a front and rear concave line 25 and a horizontal width concave line 26 are provided.

  The preferable constituent materials of the pad body 20A and the insertion body 30A of the vehicle seat pad are the same as those of the pad body 20 and the insertion body 30. Preferred dimensions in the front-rear direction of the recess 24 and the insertion body 30A are also the same as those of the pad body 20 and the insertion body 30.

  In this embodiment, the insertion body 30 </ b> A and the recess 24 have an inversely tapered shape that decreases toward the lower side, whereby the insertion body 30 </ b> A is firmly held in the recess 24. In addition, 30 A of insertion bodies may be adhere | attached on the inner surface of the recess 24, and may be fastened with a suitable fastener.

  In this embodiment, the ceiling surface of the recess 24 of the pad main body 20A and the upper surface of the insertion body 30A are flat. In this embodiment, the holes 27 are not provided.

  The insertion body 30A is not provided with a through hole 33 penetrating vertically.

  In this embodiment, the hard layer 50 is formed by placing a sheet-like material 50S such as a cloth shown in FIG. 7 in a mold for molding the pad main body 20A, and impregnating with a urethane resin at the time of molding the pad main body 20A. This is integrated with the pad main body 20A. As the sheet-like material of the hard layer 50, in addition to a cloth-like body such as a non-woven fabric or a woven fabric, coarse-felt felt, chilled sand, walif or breathable resin foam (for example, slab urethane) can be used.

  As shown in FIG. 8, the hard layer 50 may be provided not on the ceiling surface of the recess 24 but on the upper surface of the insertion body 30A. The hard layer 50 in FIG. 8 is also inserted by attaching the sheet-like material 50S to the mold for forming the insert 30A, and impregnating the sheet-like material with urethane resin when the insert 30A is formed. It is integrated with the body 30A.

  In any of the embodiments shown in FIGS. 4 to 6 and FIG. 8, the sheet-like material 50S shown in FIG. 7 is used. The sheet-like object 50S is provided with notches 51, 51 on both the left and right sides on the front side of the vehicle body so that the hard layer 50 does not exist in the lower thigh. In addition, circular openings 52, 52 are provided below the sciatic contact portion of the sheet-like object 50S (slightly behind the center in the front-rear direction and on both sides of the center in the left-right direction). The hard layer 50 does not exist.

  It is preferable that the left-right widths of the left and right cutout portions 51 are about 70 to 170 mm, particularly about 100 to 130 mm, respectively. The lateral width of the tongue-like portion 53 between the notches 51 and 51 is preferably about 20 to 100 mm.

  The opening 52 is preferably located below a portion corresponding to the sciatic nodule portion of the 3D mannequin according to JIS-D4607. The diameter of the opening 52 is preferably about 15 to 80 mm, particularly about 30 to 60 mm. The opening 52 is not limited to a circle but may be an ellipse or a polygon.

  Instead of using a sheet-like material such as a cloth-like material, a hard plate made of a synthetic resin or the like formed separately or a press felt may be used, which is used as the ceiling of the insertion body 30A and the recess 24. It may be bonded to at least one of the surfaces, or may simply be interposed between the two without bonding.

  In the vehicle seat pad 10A configured as described above, when the occupant is seated, the vehicle seat pad is deformed so that the vehicle seat pad is flexibly pressed and contracted at the lower thigh and the sciatic abutment portion, so that the seat feeling is soft. It becomes. In addition, since the hard layer 50 is provided, the seating feeling is relatively hard at portions other than the lower thigh and the sciatic abutment portion, and the occupant's body retainability is improved.

  In the embodiment shown in FIGS. 4 to 8, the hard layer non-existing portion (notch 51, opening 52) is provided in both the lower thigh and the sciatic abutment portion, but only one of them may be provided. Good.

  In the vehicle seat pad shown in FIGS. 4 to 8, when the seat pad is pressed from above the position of the tongue-like portion 53 with a pressing body having a diameter of 80 mm, the hard layer 50 and the hard layer are provided. It is preferable that there is a difference of about 1 to 15 kgf, particularly about 3 to 8 kgf in the load when the deflection amount is 30 mm. Further, when the portion 54 between the left and right openings 52, 52 is pressed in the same manner, there is a difference of about 1 to 15 kgf when the hard layer 50 is present and when the hard layer 50 is not present. It is preferable. 9 and 10 are load-deflection curves showing an example.

This vehicle seat pad is shown in FIGS. 4 to 7 and is made of urethane foam. The density of the urethane foam is 70 kg / m ³ for both the main body and the insert. The entire thickness except for the lower thigh is 60 mm, and the thickness of the insertion body is 15 mm. The pad thickness is 35 mm at the lower thigh, and the insertion body thickness is 20 mm at the lower thigh. The hard layer was formed on the ceiling surface of the recess by attaching a nonwoven fabric made of polypropylene to the inner surface of the mold. The thickness of the formed hard layer is about 1 mm.

  In the comparative example, this hard layer is not provided.

  FIG. 9 is a characteristic diagram when the portion 54 between the openings 52 is pressed by a pressing body having a diameter of 80 mm, and the load when pushing 30 mm has a difference of about 4 Kgf with and without the hard layer. is there. FIG. 10 is a characteristic diagram when the position of the tongue-like portion 53 is pressed by the pressing body. In this case, there is a difference of about 1 Kgf in the load when pushing in by 30 mm between the case where the hard layer is present and the case where the hard layer is not provided.

  FIG. 11 is a characteristic diagram when the position of the notch 51 is pressed by the pressing body. Even in the example in which the hard layer is provided, since the hard layer does not exist in the notch 51, the load-deflection curve of the notch 51 in the comparative example in which the hard layer is provided and the example in which the hard layer is provided. There is no or little difference.

  In the above embodiment, one recess is provided in the seat pad, but two or more recesses may be provided. Moreover, two or more separate insertion bodies may be mounted in one recess.

  In the present invention, it is also possible to adjust the vibration absorption characteristics of the seat pad by adjusting the basis weight and density of the hard layer.

  In this description, a cushion pad is used, but application to a back pad is also possible.

It is a top view of the vehicular seat pad concerning an embodiment. It is sectional drawing which follows the II-II line of FIG. It is sectional drawing which follows the III-III line | wire of FIG. It is a top view which shows another embodiment. It is the VV sectional view taken on the line of FIG. It is the VI-VI sectional view taken on the line of FIG. It is a perspective view of a sheet-like object. It is a perspective view which shows the insertion body of different embodiment. It is a characteristic view of an Example and a comparative example. It is a characteristic view of an Example and a comparative example. It is a characteristic view of an Example and a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,10A Vehicle seat pad 20,20A Pad main body 24 Recess 27 Hole 30 Insert body 31 Projection 32 Space | gap 33 Through-hole (communication part)
40, 50 Hard layer 50S Sheet-like material 51 Notch 52 Opening

Claims (17)

A pad body provided with a recess recessed upward in the bottom surface,
In a vehicle seat pad comprising an insertion body inserted into the recess,
A gap is provided between the ceiling surface of the recess and the upper surface of the insert,
A hard layer is provided along the ceiling surface of the recess,
A vehicular seat pad having a hole penetrating the pad main body and the hard layer and communicating the gap with a seating surface of the pad main body.   The vehicle seat pad according to claim 1, wherein a number of protrusions are provided on an upper surface of the insertion body, and the gaps are formed as the gaps. In claim 1, a plurality of grooves are provided on the upper surface of the insertion body,
A vehicular seat pad, wherein each groove has the gap.   4. The vehicle seat pad according to claim 3, wherein the groove extends in a left-right direction or a front-rear direction of the vehicle seat pad.   The vehicle seat pad according to any one of claims 1 to 4, wherein a plurality of the holes are provided.   The vehicle seat pad according to any one of claims 1 to 5, further comprising a communication portion that communicates the gap with a bottom surface of the vehicle seat pad.   The vehicle seat pad according to claim 6, wherein the communication portion passes through the insertion body.   The vehicle seat pad according to any one of claims 1 to 7, wherein the gap is provided below the bottom of the bottom.   9. The vehicle seat pad according to claim 8, wherein the holes are arranged on both left and right sides of the bottom of the bottom.   10. The vehicle seat pad according to claim 1, wherein the hard layer includes a sheet-like material and a resin impregnated in the sheet-like material. In a vehicle seat pad comprising a pad body provided with a recess on the occupant side surface or the back side opposite thereto, and an insertion body inserted into the recess,
A vehicle seat pad, wherein a hard layer for adjusting deflection at the time of sitting is present on at least a part of a mating surface between the recess and the insert.   In Claim 11, the hard layer exists for a small deflection portion that makes the deflection at the time of sitting relatively small, and the hard layer does not exist at a large deflection portion that makes the deflection at the time of sitting relatively large. A vehicle seat pad.   13. The vehicle seat pad according to claim 12, wherein the large deflection portion is at least one of a lower thigh and a sciatic abutment portion.   The vehicle seat pad according to any one of claims 11 to 13, wherein the vehicle seat pad is made of foamed resin, and the hard layer is made of a sheet-like material impregnated with resin at the time of foaming.   15. The vehicle seat pad according to claim 14, wherein the sheet-like material is made of a nonwoven fabric, a woven fabric, a coarse wool felt, a cold water, a walif or a breathable porous resin foam.   16. The vehicle seat pad according to claim 14, wherein the hard layer is formed integrally with the pad main body.   16. The vehicle seat pad according to claim 14, wherein the hard layer is formed integrally with the insertion body.

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