WO2020059881A1 - Vehicular seat pad - Google Patents

Abstract

A vehicular seat pad (1) that has a seat part that has a plurality of bottomed or not-bottomed holes. The plurality of holes comprise: one or more under-thigh holes (11h) that are provided in an under-thigh part; and one or more under-buttocks holes (12h) that are provided in an under-buttocks part. In a horizontal projection plane, the ratio of the total area of the under-thigh holes that are in an upper surface of the under-thigh part to the total area of the under-thigh part is greater than the ratio of the total area of the under-buttocks holes that are in an upper surface of the under-buttocks part to the total area of the under-buttocks part.

Description

Vehicle seat pad

The present invention relates to a vehicle seat pad.

As a conventional vehicle seat pad, there is a vehicle seat pad provided with a plurality of bottomed holes or through holes in a seating portion for supporting a seated person (for example, Patent Document 1).
This application claims the priority based on Japanese Patent Application No. 2018-177922 filed on September 21, 2018, the entire contents of which are incorporated herein by reference.

Japanese Patent Application Publication No. 2017-56078

However, in the vehicle seat pad of Patent Literature 1, there is room for further improvement in ease of driving operation by the driver's legs (hereinafter referred to as “operability”).

An object of the present invention is to provide a vehicle seat pad that can improve operability.

The vehicle seat pad of the present invention includes:
In a vehicle seat pad formed from a resin foam and having a seating portion for supporting a seated person,
The seat has a plurality of bottomless or bottomed holes,
Of the seating portion, a portion on the front side from a boundary position separated from the foremost end position of the seating portion by 45% of the total length in the front-rear direction of the seating portion is defined as a thigh lower portion, and When the rear part is the lower back,
The plurality of holes, one or a plurality of thigh holes provided in the lower part of the thigh, and one or a plurality of thigh holes provided in the lower part of the buttocks,
On the horizontal projection plane, the ratio of the total area of the lower thigh hole in the upper surface of the lower thigh to the total area of the lower thigh is the total area of the lower butt hole in the upper surface of the lower butt relative to the entire area of the lower butt. Higher than the area ratio.

According to the present invention, it is possible to provide a vehicle seat pad capable of improving operability.

1 is a perspective view showing a vehicle seat provided with a vehicle seat pad according to a first embodiment of the present invention. FIG. 2 is a plan view showing a state when the cushion pad of FIG. 1 is viewed from above. FIG. 3 is an AA cross-sectional view showing the cushion pad of FIG. 2 by a cross-section along the line AA of FIG. 2. It is a top view showing a situation when the cushion pad of the seat pad for vehicles concerning a 2nd embodiment of the present invention is seen from the upper part. FIG. 5 is a BB cross-sectional view showing the cushion pad of FIG. 4 by a cross-section along the line BB of FIG. 4.

The vehicle seat pad of the present invention can be used for any type of vehicle. The vehicle seat pad of the present invention is particularly suitable for use in a driver's seat.
Hereinafter, an embodiment of a vehicle seat pad according to the present invention will be described by way of example with reference to the drawings. Components common to the drawings are denoted by the same reference numerals. Hereinafter, the vehicle seat pad is simply referred to as “seat pad”.

FIG. 1 shows a vehicle seat 100 provided with a vehicle seat pad 1 according to a first embodiment of the present invention. As shown by the broken line in FIG. 1, the seat pad 1 of the present embodiment includes a cushion pad 1a for a seated person to sit down, and a back pad 1b for supporting the back of the seated person. The vehicle seat 100 includes, in addition to the seat pad 1, for example, a skin 101 that covers the front side (seat seat side) of the seat pad 1, a frame (not shown) that supports the cushion pad 1 a from below, and a back pad 1 b. It includes a frame (not shown) installed on the back side, and a headrest 102 installed above the back pad 1b and supporting the head of a seated person. The skin 101 is made of, for example, a material having good air permeability (such as cloth). The cushion pad 1a and the back pad 1b are each formed of a resin foam. The resin foam constituting the cushion pad 1a and the back pad 1b is preferably a soft resin foam, and more preferably a flexible polyurethane foam. The cushion pad 1a and the back pad 1b can be configured separately from each other.
In this specification, as described in each drawing, each of “up”, “down”, “left”, “right”, “front”, and “back” when viewed from a seated person sitting on the seat pad 1 The directions are simply referred to as “up,” “down,” “left,” “right,” “front,” “back,” and the like, respectively.
Hereinafter, among the seat pads 1, the cushion pad 1a, not the back pad 1b, will be described. Therefore, the cushion pad 1a may be simply referred to as "seat pad 1".

FIG. 2 is a plan view showing a state in which the cushion pad 1a of the seat pad 1 of FIG. 1 is viewed from above, in other words, a state in which the seat pad 1 (cushion pad 1a) is projected on a horizontal projection surface. FIG. As shown in FIGS. 1 and 2, the cushion pad 1 a is provided on a seating portion (also referred to as a “main pad portion”) 10 configured to support a seated person from below, and on both left and right sides of the seating portion 10. A pair of side pad portions 20 and a pair of side pad portions 20 configured to support the occupant from both left and right sides, and to be positioned above the seating portion 10 and to be swelled upward from the seating portion 10, and to be vertically aligned with the back pad 1 b. And a back pad opposing portion 30 configured to be disposed to oppose.
In the example of FIG. 2, the upper surface (front surface) US of the cushion pad 1a has a groove 40a extending substantially in the front-rear direction between the seating portion 10 and the side pad portion 20, and a groove 40a extending between the seating portion 10 and the back pad facing portion 30. A groove 40b extending substantially in the left-right direction between them, and a groove 40c extending substantially in the left-right direction inside the seat portion 10 are provided. Inside these grooves 40a, 40b, 40c, for example, a fixture (not shown) for attaching the skin 101 (FIG. 1) to the cushion pad 1a is arranged. In the example of FIG. 2, on the horizontal projection plane, the boundary between the seating portion 10 and the side pad portion 20 is the groove width center line of the groove 40 a therebetween, and the seating portion 10 and the back pad facing portion 30 Is the groove width center line of the groove 40b between them.
However, the grooves 40a and 40b may be located at different positions from the boundary between the seating portion 10 and the side pad portion 20 and the boundary between the seating portion 10 and the back pad facing portion 30. Further, the grooves 40a to 40c may not be provided on the upper surface US of the cushion pad 1a.
The seating section 10 is configured to support the thigh of the occupant from below, and is positioned rearward with respect to the lower thigh 11 and the lower thigh 11 so as to support the buttocks of the occupant from below. And a lower part 12 of the tail. In this specification, as shown in FIG. 2, on the horizontal projection plane, the seating portion 10 is separated from the foremost end position T of the seating portion 10 by a length L2 of 45% of the total length L1 of the seating portion 10 in the front-rear direction. The portion on the front side of the boundary position B is referred to as the lower thigh 11, and the portion on the rear side of the boundary position B is referred to as the lower hip 12. That is, even when the groove 40c is arranged inside the seating portion 10 as in the example of FIG. 2, the boundary position B between the lower thigh 11 and the lower butt 12 is not dependent on the position of the groove 40c. Stipulated.

FIG. 3 shows the cushion pad 1a of FIG. 2 in a vertical (vertical) cross section along the line AA of FIG. As shown in FIGS. 2 and 3, the seating portion 10 has a plurality of bottomless or bottomed (no bottom in the illustrated example) holes 10 h extending in the seating portion 10 in the vertical direction.
Regarding the hole 10h, “bottomless” indicates that the hole 10h is a through hole, that is, that the hole 10h passes through the seating portion 10. Regarding the hole 10h, “bottomed” indicates that the hole 10h is a depression, that is, one end of the hole 10h is opened on any surface of the seating portion 10, and the other end of the hole 10h is open. The end (bottom) does not open on any surface of the seating portion 10, and indicates that the end (bottom portion) terminates inside the seating portion 10.
Since the seat portion 10 has a plurality of holes 10h, the seat pad 1 (cushion pad 1a) is reduced in weight, air permeability is improved, and heat storage is reduced as compared to a case where the seat portion 10 does not have the holes 10h. And so on. Reducing the weight of the seat pad 1 (cushion pad 1a) leads to an improvement in fuel efficiency of the vehicle and, consequently, energy saving. The improvement in air permeability and the reduction in heat storage of the seat pad 1 (cushion pad 1a) lead to an improvement in the effectiveness of the air conditioner in the vehicle and, consequently, energy saving.
When the hole 10h has no bottom, it is preferable that the hole 10h is opened on the upper surface US and the rear surface BS of the seating portion 10 as in each example of FIGS. When the hole 10h has a bottom, it is preferable that the hole 10h is opened on the upper surface US or the rear surface BS of the seating portion 10. The plurality of holes 10h provided in the seating portion 10 may have no bottom as in the examples of FIGS. 2 and 3, or one or more of the plurality of holes 10h may have no bottom. May be included and one or a plurality of bottomed holes 10h may be included, or all of the plurality of holes 10h may be bottomed.

The plurality of holes 10h of the seating portion 10 include one or more (a plurality in the example of FIG. 2) bottomless or bottomed (in the example of the figure, no bottom) thigh hole 11h provided in the lower thigh 11, One or a plurality (in the example of FIG. 2) of bottomless or bottomed (in the example of FIG. 2, no-bottom) bottom holes 12 h provided in the bottom portion 12.
In the present embodiment, the ratio R11U (R11U = A11hU × 100 / A11 [%]) of the total area A11hU of the lower thigh hole 11h on the upper surface US of the lower thigh 11 to the entire area A11 of the lower thigh 11 on the horizontal projection plane. , The ratio R12U of the total area A12hU of the lower hole 12hU in the upper surface US of the lower part 12 to the entire area A12 of the lower part 12 (R12U = A12hU × 100 / A12 [%]) (R11U> R12U).
Here, the “entire area A11 of the lower thigh 11” on the horizontal projection plane indicates the entire area defined by the outer edge of the lower thigh 11 on the horizontal projection plane, and includes the area occupied by the lower thigh hole 11h. I have. Similarly, the “entire area A12 of the lower rear part 12” on the horizontal projection plane indicates the entire area defined by the outer edge of the lower rear part 12 on the horizontal projection plane, and includes the area occupied by the lower rear hole 12h. I have. The “total area A11hU of the lower thigh hole 11h on the upper surface US of the lower thigh 11” on the horizontal projection plane is the total area of the openings of the lower thigh 11 of each lower thigh hole 11 to the upper surface US of the lower thigh 11 on the horizontal projection plane. Similarly, the “total area A12hU of the lower butt hole 12h on the upper surface US of the lower rear portion 12” on the horizontal projection plane is the sum of the areas of the openings to the upper surface US of the lower butt hole 12 of the lower rear hole 12h on the horizontal projection surface. is there.
According to the present embodiment, since R11U> R12U, the porosity of the lower thigh 11 can be higher than the porosity of the lower butt 12, and thus the lower thigh 11 can be softer than the lower butt 12. Thereby, when the seat pad 1 (cushion pad 1a) is installed in the driver's seat, a seated person (driver) sitting on the seating portion 10 can easily move his or her thigh. And the driving operation becomes easier. Therefore, the operability of the seat pad 1 can be improved. By setting R11U> R12U, the lower back part 12 can be made harder than the lower thigh part 11, so that the back part of the seated person sitting on the seating part 10 can be firmly supported. Thereby, the seated person can perform the driving operation stably. In addition, sitting comfort can be improved.
Further, according to the present embodiment, assuming that the ratio R11U is constant, the ratio R11U on the upper surface US of the lower thigh 11 can be increased as compared to the case where R11U = R12U, and thus the lower thigh 11 Since the porosity can be increased, in addition to the improvement in operability, it is also possible to reduce the weight of the seat pad 1 (cushion pad 1a), improve the air permeability, and reduce the heat storage property.
Further, according to the present embodiment, even if the seat pad 1 is installed in a seat other than the driver's seat, the occupant can easily move his / her own thigh, Since the buttocks are firmly supported, the sitting comfort can be improved.

The arrangement pattern, the number, the diameter, the area, the shape, and the like of the holes 10h (thigh holes 11h, buttocks holes 12h) on the horizontal projection plane may be arbitrary. From the viewpoint of improving the operability and the sitting comfort, the arrangement pattern of the thigh holes 11h is symmetrical with respect to a virtual line C (hereinafter, referred to as a “left-right center line”) passing through the center of the seat 10 in the left-right direction. It is suitable.
The shape of the hole 10h (the lower thigh hole 11h, the lower thigh hole 12h) on the horizontal projection plane is a circle (a perfect circle) in the example of the figure, but other than that, for example, an ellipse, a triangle, a quadrangle, and a rhombus Also, polygonal shapes such as trapezoids and the like are suitable.

As a method of forming the hole 10h in the seating portion 10, for example, an upper mold for molding the back surface BS of the seat pad 1 in a mold for foam molding the seat pad 1 (cushion pad 1a), and a seat pad A projection is provided on at least one of the molding surfaces of the lower mold for molding the upper surface US, and a hole 10h is formed by the peripheral surface of the projection when the upper mold and the lower mold are aligned. The technique of being shaped is preferred.
However, the hole 10h may be formed by a different method.

In the example of FIG. 2, the diameter, area, and shape of the plurality of holes 10 h provided in the seating section 10 are constant from the upper surface US of the seating section 10 to the back surface (lower surface) BS. As shown in FIG. 3, the wall surface of the hole 10h extends linearly in a cross section in the vertical direction (vertical direction) and is parallel to the vertical direction (vertical direction).
2 and 3, in the horizontal projection plane, the ratio R11B of the total area A11hB of the lower thigh hole 11h on the back surface BS of the lower thigh 11 to the total area A11 of the lower thigh 11 (R11B = A11hB × 100 / A11 [%]) is the same as the ratio R11U of the total area A11hU of the lower thigh hole 11h on the upper surface US of the lower thigh 11 to the entire area A11 of the lower thigh 11 (R11B = R11U). In the horizontal projection plane, the ratio R12B of the total area A12hB of the lower hole 12hB in the back surface BS of the lower part of the lower part 12 to the total area A12 of the lower part of the lower part 12 (R12B = A12hB × 100 / A12 [%]) The ratio R12U of the total area A12hU of the lower hole 12hU in the upper surface US of the lower part 12 to the total area A12 of R12 is the same (R12B = R12U).
Here, the “total area A11hB of the lower thigh hole 11h on the back surface BS of the lower thigh 11” on the horizontal projection plane is the sum of the areas of the openings to the rear surface BS of the lower thigh 11 of each lower thigh hole 11h on the horizontal projection surface. It is. Similarly, the “total area A12hB of the lower back hole 12h on the rear surface BS of the lower rear part 12” on the horizontal projection plane is the total area of the openings to the rear surface BS of the lower rear part 12 of the lower rear hole 12h on the horizontal projection plane. is there.
In this case, in the mold for foaming the cushion pad 1a, the shape of the projection for forming the hole 10h is simplified, so that the manufacture of the mold is simplified. Further, when manufacturing the seat pad 1 (cushion pad 1a), when the cushion pad 1a is die-cut from the die, the projection of the die can be easily pulled out from the hole 10h. Therefore, the formation of the hole 10h is simplified.
The hole 10h may have a constant diameter, area, and shape from the upper surface US to the rear surface BS of the seating portion 10, and the wall surface of the hole 10h may be inclined with respect to the vertical direction.

4 and 5 correspond to FIGS. 2 and 3, respectively, and show a seat pad 1 (cushion pad 1a) according to a second embodiment of the present invention. In the second embodiment shown in FIGS. 4 and 5, similarly to the first embodiment, the seat 10 satisfies the configuration of R11U> R12U. 4 and 5, each hole 10h has no bottom. However, as described above, the hole 10h may have a bottom.
As in the second embodiment shown in FIGS. 4 and 5, some or all (all in the example of the drawings) of the plurality of holes 10 h of the seating portion 10 have a diameter and an area of the upper surface US of the seating portion 10. From the rear surface BS. As shown in FIG. 5, in this example, the wall surface of the hole 10h extends linearly in a cross section in the vertical direction (vertical direction) and is inclined at an acute angle with respect to the vertical direction (vertical direction). ing. However, the wall surface of the hole 10h may extend in a curved shape in a vertical cross section.
4 and 5, the ratio R11B of the total area A11hB of the lower thigh hole 11h on the back surface BS of the lower thigh portion 11 to the total area A11 of the lower thigh portion 11 on the horizontal projection plane is the entirety of the lower thigh portion 11. The ratio of the total area A11hU of the thigh hole 11h on the upper surface US of the lower thigh 11 to the area A11 is smaller than R11U (R11B <R11U). Further, on the horizontal projection plane, the ratio R12B of the total area A12hB of the lower butt hole 12h on the back surface BS of the lower butt portion 12 to the entire area A12 of the lower butt portion 12 is the upper surface of the lower butt portion 12 with respect to the entire area A12 of the lower butt portion 12. It is smaller (R12B <R12U) than the ratio R12U of the total area A12hU of the pilot hole 12h in the US.
In this case, the seat pad 1 (cushion pad 1a) may be gradually hardened from the upper side to the lower side as compared with the case where R11B = R11U and R12B = R12U as in the first embodiment. it can. Thus, when the occupant sits on the seating portion 10, the occupant feels soft at first and feels harder from the rear (seating feeling). Therefore, the sitting comfort can be improved. In this case, in a mold for foaming the seat pad 1 (cushion pad 1a), a projection for forming the hole 10h is provided only on a lower mold for forming the upper surface US of the seat pad 1. In this case, the die can be easily removed and the hole 10h can be easily formed.
When the ratios R11U and R12U on the upper surface US of the seat pad 1 are considered to be constant, the first embodiment shown in FIGS. 2 and 3 has a larger seat pad than the second embodiment shown in FIGS. Since the porosity on the back surface BS side of 1 is high, it is possible to reduce the weight, improve the air permeability, reduce the heat storage, and the like.

In the examples of FIGS. 4 and 5, from the viewpoint of improving operability and sitting comfort, the total area A11hB of the lower thigh hole 11h on the rear surface BS of the lower thigh portion 11 with respect to the entire area A11 of the lower thigh portion 11 on the horizontal projection plane. Is more than the ratio R12B of the total area A12hB of the lower hole 12hB in the back surface BS of the lower part of the buttocks 12 to the total area A12 of the lower part of the buttocks 12 (R11B ≧ R12B), and is more preferable than the ratio R12B. It is more preferable that the ratio is large (R11B> R12B).

In each of the above-described examples, the ratio R11U of the total area A11hU of the lower thigh hole 11h on the upper surface US of the lower thigh 11 to the total area A11 of the lower thigh 11 on the horizontal projection plane is preferably 5 to 25%. Yes, and more preferably 7 to 23%.
Further, in the horizontal projection plane, the ratio R12U of the total area A12hU of the lower butt hole 12h on the upper surface US of the lower butt portion 12 to the entire area A12 of the lower butt portion 12 is preferably 1 to 20%, and 3 to 18%. % Is more preferable.
Thereby, sitting comfort can be improved while improving operability.
From a similar viewpoint, the ratio R11U of the total area A11hU of the lower thigh hole 11h on the upper surface US of the lower thigh 11 to the total area A11 of the lower thigh 11 on the horizontal projection plane is the lower rear part of the lower rear part 12 with respect to the entire area A12 of the lower rear part 12. The ratio R12U of the total area A12hU of the lower hole 12h in the upper surface US of the upper surface US is preferably 1.1 to 3.0 times, and more preferably 1.5 to 2.5 times.

In each of the above-described examples, the ratio R11B of the total area A11hB of the lower thigh hole 11h on the back surface BS of the lower thigh 11 to the total area A11 of the lower thigh 11 on the horizontal projection plane is preferably 3 to 25%. And 5 to 23% is more preferable.
In the horizontal projection plane, the ratio R12B of the total area A12hB of the lower hole 12hB on the back surface BS of the lower part 12 to the entire area A12 of the lower part 12 is preferably 0.5 to 20%. More preferably, it is ～ 18%.
Thereby, sitting comfort can be improved while improving operability.
From a similar viewpoint, the ratio R11B of the total area A11hB of the lower thigh hole 11h on the back surface BS of the lower thigh 11 to the total area A11 of the lower thigh 11 on the horizontal projection plane is the lower rear part of the lower rear part 12 with respect to the entire area A12 of the lower rear part 12. The ratio R12B of the total area A12hB of the lower hole 12h in the back surface BS of the rear surface 12 is preferably 1.1 to 3.0 times, and more preferably 1.5 to 2.5 times.

In each of the above-described examples, as shown in FIGS. 2 to 5, on the horizontal projection plane, the area of each lower thigh hole 11 h on the upper surface US of the lower thigh 11 is equal to the lower area of the lower thigh 12 on the upper surface US. It is preferable that the area is larger than each area of the holes 12h.
This allows the occupant to easily move his or her thigh, thereby improving operability. Also, since the buttocks are firmly supported, riding comfort can be improved.
2 to 5, in the horizontal projection plane, the area of each lower thigh hole 11h on the upper surface US and the area of each lower butt hole 12h on the upper surface US are the same.
However, in the horizontal projection plane, the areas of the thigh pilot holes 11h on the upper surface US and the areas of the lower hip holes 12h on the upper surface US may be different from each other. In this case, in the horizontal projection plane, it is preferable that the area of the lower thigh hole 11h having the smallest area on the upper surface US is larger than the area of the lower butt hole 12h having the largest area on the upper surface US.

In the example of FIGS. 4 and 5, on the horizontal projection plane, the area of each thigh hole 11 h on the back surface BS of the lower thigh portion 11 is equal to or greater than the area of each thigh hole 12 h on the back surface BS of the lower thigh portion 12. Is more preferable, and it is more preferable that the area is larger than each area of each lower butt hole 12h on the back surface BS of the lower butt 12.
In the examples of FIGS. 4 and 5, on the horizontal projection plane, the areas of the thigh preparation holes 11h on the back surface BS and the areas of the respective buttocks preparation holes 12h on the back surface BS are the same.
However, on the horizontal projection plane, the areas of the thigh preparation holes 11h on the back surface BS and the areas of the respective buttocks preparation holes 12h on the back surface BS may be different from each other. In this case, on the horizontal projection plane, it is preferable that the area of the thigh lower hole 11h having the smallest area on the back surface BS is equal to or greater than the area of the lower hip hole 12h having the largest area on the back surface BS. It is more preferable that the area is larger than the area of the large bottom hole 12h.

In each of the above-described examples, as shown in FIGS. 2 to 5, on the horizontal projection plane, the diameter d12 of each thigh hole 11h on the upper surface US of the lower thigh 11 is the same as the diameter d12 of the lower thigh 12 on the upper surface US. It is preferable that each of the pilot holes 12h be larger than the diameter d22 (d12> d22).
This allows the occupant to easily move his or her thigh, thereby improving operability. Also, since the buttocks are firmly supported, riding comfort can be improved. Here, the “diameter (d12, d22)” of the hole 10h (thigh hole 11h, buttocks hole 12h) is the circumscription of the hole 10h on the horizontal projection surface when the hole 10h has a non-circular shape on the horizontal projection surface. It refers to the diameter of a circle.
2 to 5, in the horizontal projection plane, the diameter d12 of each thigh hole 11h on the upper surface US and the diameter d22 of each lower butt hole 12h on the upper surface US are the same.
However, in the horizontal projection plane, the diameter d12 of each lower thigh hole 11h on the upper surface US and the diameter d22 of each lower butt hole 12h on the upper surface US may be different from each other. In this case, in the horizontal projection plane, it is preferable that the diameter d12 of the thigh lower hole 11h having the smallest diameter on the upper surface US is larger than the diameter d22 of the lower butt hole 12h having the largest diameter on the upper surface US.

In each example described above, the diameter d12 of each thigh hole 11h on the upper surface US of the lower thigh portion 11 is preferably 10 to 40 mm, and more preferably 13 to 37 mm. Further, each of the area of each thigh pilot hole 11h of the upper surface US of the thigh section 11 is suitable If it is 78 ~ 1256mm ^2, it is more preferable that is 132 ~ 1075 mm ^2.
Further, in each of the above-described examples, the diameter d22 of each under-assembly hole 12h in the upper surface US of the under-ass part 12 is preferably 5 to 35 mm, and more preferably 8 to 32 mm. Further, each of the area of each butt pilot hole 12h of the upper surface US of the buttocks bottom 12, is suitable When it is 19 ~ 962mm ^2, it is more preferable that is 50 ~ 804mm ^2.
Thereby, sitting comfort can be improved while improving operability.

In each of the above-described examples, the diameter d13 of each of the thigh holes 11h on the back surface BS of the lower thigh portion 11 is preferably 5 to 40 mm, and more preferably 8 to 37 mm. Further, each of the area of each thigh pilot hole 11h of the back surface BS of the thigh section 11 is suitable If it is 19 ~ 1256mm ^2, it is more preferable that is 50 ~ 1075mm ^2.
Further, in each of the above-mentioned examples, the diameter d23 of each under-assembly hole 12h on the back surface BS of the under-ass part 12 is preferably from 2 to 39 mm, and more preferably from 5 to 35 mm. Further, each area of each butt pilot hole 12h of the back surface BS of the buttocks bottom 12 is suitable If it is 3 ~ 1193mm ^2, it is more preferable that is 19 ~ 962mm ^2.
Thereby, sitting comfort can be improved while improving operability.

In each of the examples of FIGS. 2 to 5, the plurality of thigh holes 11h are arranged in a uniform arrangement pattern, and are arranged at a constant pitch p11 in each of the left-right direction and the front-back direction. The “pitch interval p11” between the thigh holes 11h is a distance between the respective center axes of a pair of adjacent thigh holes 11h on the horizontal projection plane. However, the arrangement pattern of the plurality of thigh holes 11h may be arbitrary as described above, and may be a non-uniform arrangement pattern.
In addition, in each of the examples of FIGS. 2 to 5, a plurality of under-holes 12h are arranged in a uniform arrangement pattern, and are arranged at a constant pitch interval p12 in each of the left-right direction and the front-back direction. . The “pitch interval p12” between the lower-bottom holes 12h is a distance between the respective center axes of a pair of the lower-bottom holes 12h adjacent to each other on the horizontal projection plane. However, the arrangement pattern of the plurality of under-assembly holes 12h may be arbitrary as described above, and may be a non-uniform arrangement pattern.
In each of the examples of FIGS. 2 to 5, the pitch interval p11 between the lower thigh holes 11h and the pitch interval p12 between the lower thigh holes 12h are the same (p11 = p12), but they are different from each other. Is also good.

In each example of FIGS. 2 to 5, the distance l11 between the thigh preparation holes 11h is smaller than the distance l12 between the buttocks preparation holes 12h (l11 <l12). The “distance l11” between the thigh holes 11h is the outer edge of the pair of thigh holes 11h at the position where the outer edges of the pair of adjacent thigh holes 11h are closest to each other on the horizontal projection plane. Is the distance between The “distance l12” between the lower holes 12h is defined as the outer edge of the pair of lower holes 12h at the position where the outer edges of the pair of adjacent lower holes 12h are closest to each other on the horizontal projection plane. Is the distance between
In this case, operability can be further improved.
However, the distance l11 between the lower thigh holes 11h may be the same as the distance l12 between the lower thigh holes 12h (l11 = l12), or may be larger (l11> l12).

In each of the above-described examples, from the viewpoint of improving operability and sitting comfort, the distance l11 between the thigh holes 11h is preferably 2 to 50 mm, and more preferably 5 to 40 mm. . Further, the distance l12 between the under-ass holes 12h is preferably from 5 to 70 mm, and more preferably from 10 to 60 mm.

In each of the above-described examples, the seat pad 1 (cushion pad 1a) has no hole 10h from the viewpoint of improving operability, reducing weight, improving air permeability, and reducing heat storage. The ratio RW (RW = RW = RW) of the total weight W2 of the actual seat pad 1 (cushion pad 1a) having the hole 10h to the total weight W1 of the seat pad 1 (cushion pad 1a) in the case of being filled with the same resin foam. (W2 × 100 / W1 [%]) is preferably 97% or less, and more preferably 92% or less. On the other hand, from the viewpoint of improving sitting comfort, the ratio RW is preferably equal to or greater than 70%, and more preferably equal to or greater than 75%.

In each of the above-described examples, when the hole 10h provided in the seating portion 10 has a bottom, the depth (length in the vertical direction) of the hole 10h corresponds to the thickness (length in the vertical direction) of the seating portion 10. Is preferably 30% or more and less than 100%.

(Examples, Comparative Examples)
Table 1 shows the evaluation results of the cushion pad test pieces of the vehicle seat pads according to Comparative Examples 1 and 2 and Examples 1 to 5 of the present invention. The specimens of Comparative Examples 1 and 2 and Examples 1 to 5 all have the same outer shape dimensions and material (composition), different hole configurations, and accordingly the weight of the cushion pad. Are different. The specimen of Comparative Example 1 has no holes, whereas the specimens of Comparative Example 2 and Examples 1 to 5 have holes without a bottom. The details of the configuration of the test specimen in each example are as shown in Table 1.
Table 1 shows the sensory evaluation of operability and ride comfort that the evaluator feels when sitting on the test piece using the test piece of each example. In Table 1, “◎” indicates an evaluation of “very good”, “○” indicates an evaluation of “good”, and “×” indicates an evaluation of “bad”.

わ か る As can be seen from Table 1, the specimens of Examples 1 to 5 have better operability than Comparative Examples 1 and 2. Further, the test specimens of Examples 1 to 5 are more comfortable to sit than those of Comparative Examples 1 and 2.

The vehicle seat pad of the present invention can be used for any type of vehicle. The vehicle seat pad of the present invention is particularly suitable for use in a driver's seat.

1: vehicle seat pad (seat pad),
1a: cushion pad, 10: seating part (main pad part), 10h: hole, 11: lower thigh, 11h: lower thigh, 12: lower hip, 12h: lower hip,
20: side pad portion, 30: back pad facing portion, 40a, 40b, 40c: groove,
1b: back pad,
100: vehicle seat, 101: skin, 102: headrest,
B: Boundary position, T: Front end position, US: Top surface, BS: Back surface,
C: Left-right center line

Claims (7)

In a vehicle seat pad formed from a resin foam and having a seating portion for supporting a seated person,
The seat has a plurality of bottomless or bottomed holes,
Of the seating portion, a portion on the front side from a boundary position separated from the foremost end position of the seating portion by 45% of the total length in the front-rear direction of the seating portion is defined as a thigh lower portion, and When the rear part is the lower back,
The plurality of holes, one or a plurality of thigh holes provided in the lower part of the thigh, and one or a plurality of thigh holes provided in the lower part of the buttocks,
On the horizontal projection plane, the ratio of the total area of the lower thigh hole in the upper surface of the lower thigh to the total area of the lower thigh is the total area of the lower butt hole in the upper surface of the lower butt relative to the entire area of the lower butt. A vehicle seat pad that is higher than the area ratio. 2. The vehicle seat pad according to claim 1, wherein an area of each of the lower thigh holes on the upper surface of the lower thigh is greater than an area of each of the lower thigh holes on the upper surface of the lower buttocks. 3. The vehicle seat pad according to claim 1, wherein a diameter of each of the lower thigh holes on the upper surface of the lower thigh is larger than a diameter of each of the lower thigh holes on the upper surface of the lower butt. On the horizontal projection plane,
A ratio of the total area of the lower thigh hole on the upper surface of the lower thigh to the total area of the lower thigh is 5 to 25%;
The vehicle seat pad according to any one of claims 1 to 3, wherein a ratio of a total area of the lower hole in the upper surface of the lower part of the buttocks to a total area of the lower part of the buttocks is 1 to 20%. A diameter of each of the thigh holes on the upper surface of the lower thigh is 10 to 40 mm;
The vehicle seat pad according to any one of claims 1 to 4, wherein a diameter of each of the under-assembly holes on the upper surface of the under-ass part is 5 to 35 mm. The vehicle seat pad according to any one of claims 1 to 5, wherein each of the plurality of holes has a constant diameter from an upper surface to a rear surface of the seat. The vehicle seat pad according to any one of claims 1 to 5, wherein each of the plurality of holes gradually decreases in diameter from an upper surface to a rear surface of the seat.

Images