JP2010047228A - Seat pad for vehicle driver's seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat pad for a vehicle driver's seat excellent in soft feeding of a right under-thigh part and also having support characteristic of an occupant. <P>SOLUTION: Projections 9 extending in a perpendicular direction are provided by providing a large number of recession holes 8 on an upper surface of the right under-thigh part 7 on the under-thigh part 2 of the seat pad 1 for the vehicle driver's seat. A volume ratio of the projection 9 is 10-80%, preferably 40-60%. Only the projections 9 are compressed/deformed at the initial stage when the right thigh of the occupant is contacted with the right under-thigh part 7, and the occupant feels soft feeling. Accordingly, contact feeling of the right thigh to the seat pad becomes soft and excellent when a brake and an accelerator are operated by the right foot. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle driver's seat pad, and more particularly, to a vehicle driver's seat pad having a soft feeling in the lower right thigh.

  Conventionally, a seat pad attached to a sheet of an automobile or the like is manufactured by injecting a urethane compound stock solution obtained by mixing a polyol component compound solution and an isocyanate component into a mold and foam-molding it.

  Among the seat pads of automobiles, the material of the portion where the occupant's buttocks and the back directly contact each other has a close relationship with the sitting comfort and riding comfort.

  Accordingly, various seat cushion pads have been proposed in which improvements are made such that the seating surface having the greatest influence on the sitting comfort is a high density portion and the other portions are low density portions.

For example, Japanese Patent Application Laid-Open No. 2002-153357 describes a seat cushion pad in which a part or all of the seating surface other than the lower part of the seat surface is lower in density and substantially equal in hardness.
JP 2002-153357 A

  The lower right thigh of the vehicle driver's seat pad is a part where the right thigh is pressed each time the driver steps on the accelerator or the brake pedal, and there is a risk of feeling uncomfortable if the soft feeling is insufficient. However, if the entire seat pad including the lower right thigh is made soft, the occupant's support characteristics and the like deteriorate.

  An object of the present invention is to provide a vehicle driver's seat pad that has excellent softness in the lower right thigh and also has good occupant support characteristics.

  The vehicle driver's seat pad according to claim 1 is characterized in that in the vehicle driver's seat pad made of a resin foam molded body, the lower right thigh is made more flexible than its surroundings.

  The seat pad for a vehicle driver's seat according to claim 2 is characterized in that, in claim 1, the lower right thigh is made more flexible than its surroundings by providing irregularities on the upper or lower surface of the lower right thigh. .

  The seat pad for a vehicle driver's seat according to claim 3 is a convex strip extending in a plurality of directions between the recessed holes by providing a plurality of recessed holes on the upper surface or the lower surface of the lower right thigh in claim 2. Is provided.

  The vehicle driver's seat pad according to claim 4 is characterized in that, in claim 3, the volume ratio of the ridges in the lower right thigh is 10 to 80%.

  The vehicle driver's seat pad according to claim 5 is characterized in that, in claim 3, the volume ratio of the ridges at the lower right thigh is 40 to 60%.

  The vehicle driver's seat pad according to claim 6 is characterized in that, in any one of claims 3 to 5, the average depth of the recessed holes is 2 to 40 mm.

  The vehicle driver's seat pad according to claim 7 is characterized in that, in any one of claims 3 to 6, the ridges extend in a plurality of directions.

  The vehicle driver's seat pad according to claim 8 is characterized in that, in claim 7, the ridges extend in two or three directions.

The vehicle driver's seat pad according to claim 9 is characterized in that, in any one of claims 3 to 7, the opening area of one recessed hole is 40 to 1000 mm ² .

  A vehicle driver's seat pad according to claim 10 is characterized in that, in any one of claims 3 to 9, the concave hole is a triangle, a square, a polygon, a long hole, or a circle. is there.

  The vehicle driver's seat pad according to claim 11 is characterized in that, in any one of claims 3 to 10, the corner edge where the top surface and the side surface of the ridge intersect is a curved surface. is there.

  The vehicle driver's seat pad according to claim 12 is characterized in that, in any one of claims 3 to 11, a corner edge where a side surface of the ridge and a bottom surface of the ridge intersect is a curved surface. Is.

  The vehicle driver's seat pad according to claim 13 is characterized in that, in any one of claims 3 to 12, the ridge has a cross-sectional shape in which the width of the upper part is smaller than that of the lower part. It is.

  The seat pad for a vehicle driver's seat according to claim 14 is the seat pad for a vehicle driver seat according to claim 2, wherein a groove is provided on an upper surface or a lower surface of the lower right thigh, and a convex portion is formed between the grooves to make the lower right thigh lower than its surroundings. It is characterized by being flexible.

  The vehicle driver's seat pad according to claim 15 is characterized in that, in claim 14, the average width of the grooves is 5 to 20 mm, and the depth of the grooves is 5 to 20 mm.

  The vehicle driver's seat pad according to claim 16 is characterized in that, in claim 15, the volume ratio of the convex portion at the lower right thigh is 10 to 80%.

  The vehicle driver's seat pad according to claim 17 is characterized in that, in any one of claims 14 to 16, the groove extends in a plurality of directions.

  The vehicle driver's seat pad according to claim 18 is characterized in that, in any one of claims 14 to 17, a corner edge where a top surface and a side surface of the convex portion intersect is a curved surface. is there.

  The vehicle driver's seat pad according to claim 19 is characterized in that, in any one of claims 14 to 18, the corner edge where the side surface of the convex portion and the bottom surface of the groove intersect is a curved surface. It is.

  The vehicle driver's seat pad according to claim 20 is characterized in that, in any one of claims 14 to 19, the groove has a cross-sectional shape in which the width of the bottom portion is smaller than that of the upper portion. is there.

  The vehicle driver's seat pad according to claim 21 is the vehicle seat pad according to any one of claims 1 to 20, wherein the lower thigh is more flexible than the lower buttocks, and the lower right thigh is more flexible than the other lower thighs. It is characterized by that.

A vehicle driver's seat pad according to claim 22 is made of polyurethane foam having a density of 35 to 100 kg / m ³ and a 25% ILD hardness of 15 to 45 kgf / 200 mmφ in any one of claims 1 to 21. To do.

  In the vehicle driver's seat pad of the present invention, the lower right thigh is made flexible, so that the soft feeling when the right thigh of the driver's seat occupant (driver) is pressed is good. Since the other parts of the seat pad are harder than the lower right thigh, the support characteristics of the driver's body are also good.

  In order to make the lower right thigh flexible, it is preferable that the upper or lower surface of the lower right thigh of the seat pad is provided with irregularities so that the lower right thigh is easily deformed when a load is applied from the right thigh. . In this way, the lower right thigh can also be foam-molded integrally with other parts.

  In order to make the lower right thigh flexible, it is preferable to provide a plurality of concave holes in the lower right thigh so as to provide protrusions extending in a plurality of directions between the concave holes. By providing this ridge, the ridge is compressed and deformed when the right thigh comes into contact with the lower right thigh, and the lower right thigh becomes flexible. In addition, when a protrusion that extends in multiple directions is provided instead of an independent protrusion, the protrusion does not buckle even when the protrusion is deeply compressed and deformed by a load from the right thigh, and the contact feeling Is good.

  By making the volume ratio of the ridges at the lower right thigh 10 to 80%, particularly 40 to 60%, the soft feeling is improved.

  When the above-mentioned ridges are provided in a plurality of directions, the anisotropy of the seating feeling is reduced.

  In order to make the lower right thigh flexible, a configuration may be adopted in which a groove is provided in the lower right thigh and a convex portion is formed between the grooves. Also in this case, when the right thigh comes into contact with the lower right thigh, the convex portion easily compresses and deforms, and the soft feeling is good. A soft feeling becomes favorable by setting the volume ratio of this convex part to 10 to 80%, especially 40 to 60%. When the grooves are provided in a plurality of directions, the anisotropy of the seating feeling is reduced.

  In the present invention, the corners on the upper end side and the base end side of the ridges and protrusions are curved surfaces, and so-called R is applied, so that the durability of the ridges and protrusions is improved.

  In the present invention, the entire lower thigh may be made more flexible than the lower buttocks, and the lower right thigh may be particularly flexible. If comprised in this way, the seating feeling of the lower left thigh will also become soft.

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

  1 is a plan view of a vehicle driver's seat pad according to an embodiment, FIG. 2 is a perspective view of a lower right thigh of a seating surface, and FIG. 3 is a sectional view taken along line III-III in FIG. is there. FIG. 4 is a sectional view showing another example of the sectional shape of the ridge.

  The driver's seat pad 1 is made of a polyurethane foam that is integrally foam-molded as a whole, and has a thigh lower part 2, a bottom part 3, and a side part 4.

  On the upper surface of the seat pad 1, a front and rear direction hanging groove 5 and a lateral width direction hanging groove 6 for suspending a skin material (not shown) are provided in an H shape. A portion between the left and right suspension grooves 5 and 5 is a lower thigh 2 in front of the suspension groove 6. Further, the bottom part 3 is between the hanging grooves 5 and 5 behind the hanging groove 6.

  By providing a large number of concave holes 8 on the upper surface of the lower right thigh 7 in the lower thigh 2 of the seat pad 1, protruding ridges 9 extending in the orthogonal direction are provided. The lower right thigh 7 is an area where the right thigh hits when the driver's seat is seated. In the normal case, the left side 7a of the region of the lower right thigh 7 is located in the range of 10 to 50 mm, particularly 30 to 40 mm, rightward from the center line C of the seat pad 1. Further, the right side 7b of the region of the lower right thigh 7 is located in the range of 100 to 200 mm, particularly 110 to 150 mm, rightward from the center line C of the seat pad 1. The right and left width of the lower right thigh 7, that is, the distance between the left side 7a and the right side 7b is preferably about 50 to 200 mm, particularly about 80 to 120 mm. The length L in the front-rear direction of the lower right thigh 7 is preferably about 100 to 300 mm, particularly about 150 to 250 mm. The front end of the lower right thigh 7 is preferably located within 50 mm from the foremost end 1 f of the seat pad 1, for example, in the range of 5 to 30 mm.

  In the embodiment shown in FIGS. 1 to 3, the ridge 9 has a square cross section perpendicular to the seating surface, and the ridge 9 has a uniform width t from the base end (lower end) to the tip end (upper end). However, the upper width may be smaller than the lower width. For example, a trapezoidal shape, a half-angle shape, a semi-elliptical shape, or a U-shaped cross-sectional shape that decreases in width t toward the upper side may be used. Further, as shown in FIG. 4, R may be attached to the corner edge on the base end side or the upper end side of the ridge 9. The radius of curvature of the R is preferably about 1 to 10 mm (diameter half the depth h). The base end side corner edge is a corner angle between the side surface of the ridge 9 and the bottom surface of the recessed hole 8, and the upper end side corner edge is an intersection angle edge between the side surface of the ridge 9 and the top surface.

  The top surface of the ridge 9 is continuous with the seating surface around the lower right thigh region where the concave hole 8 and the ridge 9 are provided.

The height of the ridge 9, that is, the depth h of the recessed hole 8 is 2 to 40 mm, particularly 5 to 20 mm, especially 10 to 15 mm, and the width (thickness) t of the ridge 9 is 2 to 20 mm, particularly 4 to 10 mm. It is preferable that the width w is 10 to 30 mm, particularly 20 to 30 mm, and the opening area of one concave hole 8 is 40 to 1000 mm ^2, particularly 100 to 900 mm ^2, particularly 400 to 700 mm ² . When the thickness t of the ridge 9 changes in the height direction as shown in FIG. 4, for example, the thickness t, the width w, and the opening area are all the thickness, width, The opening area shall be indicated.

  The volume ratio of the ridges 9 is preferably 10 to 80%, particularly 40 to 60%. The volume ratio of the ridge is the volume a · b · h obtained by multiplying the area (a × b in FIG. 2) of the region provided with the ridge 9 and the recessed hole 8 by the depth h of the recessed hole 8. The ratio which the volume of the protruding item | line 9 occupies is said. By setting the volume ratio to 10 to 80%, the soft feeling of the lower right thigh is improved. Moreover, durability of a protruding item | line becomes favorable by setting it as 40 to 60%.

The driver's seat pad 1 is integrally formed of a polyurethane foam having a density of 35 to 100 kg / m ^3, particularly 60 to 70 kg / m ³ , and a 25% ILD hardness of 15 to 45 kgf / 200 mmφ, particularly 15 to 35 kgf / 200 mmφ. It is preferable. The concave hole 8 is formed by providing a convex portion on the cavity surface of this mold, preferably the bottom surface of the cavity.

  After that, a skin pad (not shown) is attached to the polyurethane molded body, so that a vehicle driver seat pad product is obtained.

  When the user sits on the driver's seat pad 1 configured as described above and the right thigh of the occupant is pressed against the lower right thigh 7, only the ridge 9 is compressed and deformed, and the occupant feels a soft touch. Therefore, the feeling of contact with the seat pad of the right thigh when the brake or accelerator is operated with the right foot is soft and good. When the right thigh sinks deeply and the protruding ridge 9 is further compressed and deformed, the repulsive force of the protruding ridge 9 becomes strong and the right thigh is stabilized.

  In this embodiment, since the ridge 9 has a lattice shape extending in two orthogonal directions, the ridge 9 is reliably prevented from buckling.

  In addition, when the top surface of the ridge 9 is flat and the width w of the concave hole 8, the height h and the width (thickness) t of the ridge 9 are within the above ranges, the concave hole 8 and the convex Article 9 is hard to be sensed by the human body and has a good tactile sensation. Further, when the ridge 9 has a substantially uniform cross-sectional shape from the base end to the tip end, the gradient of the stress-strain curve at the time of compressive deformation becomes gentle and the seating feeling is good.

  In the above embodiment, only the lower right thigh 7 is soft, but the entire lower thigh 2 may be softer than the lower buttocks 3, and among them, the lower right thigh 7 may be softer. In order to make the entire lower thigh 2 soft, a concave hole may be provided in the entire lower thigh 2.

[Description of differently shaped recessed holes]
1 to 3, the shape of the concave hole 8 in plan view is a square, but the concave hole may be a triangle, a square, a rectangle, an ellipse, an elongated groove, or the like. It may be a long hole, a polygon such as a hexagon or an octagon, or a circle. In the case of a long hole, the length in the longitudinal direction is preferably 1.5 to 20 times, particularly about 5 to 15 times the width (width in the short direction).

  FIG. 5 shows the lower right thigh softened by arranging the hexagonal concave holes 10 in a honeycomb shape, and the ridges 11 are formed between the concave holes 10.

  The thickness t of the ridge 11 is preferably 2 to 20 mm, particularly 4 to 10 mm, and the diagonal length L of the concave hole 10 is preferably 10 to 40 mm, particularly preferably 15 to 30 mm. The opening area of one concave hole 10, the height of the ridge 11 (depth of the concave hole 10), the preferred range of the area ratio of the top surface of the ridge 11, the preferred material of the seat pad, etc. are shown in FIG. ~ Same as the embodiment of FIG.

  In FIG. 5, the concave hole is a regular hexagon, but it may be a hexagon other than a regular hexagon. However, a hexagon whose opposite sides are parallel is preferable, and a regular hexagon is most preferable.

  In FIG. 6, circular concave holes 12 are arranged so that the center of each circle is located at each vertex of an equilateral triangle, and a convex strip 13 is formed between the concave holes 12, thereby softening the lower right thigh. Is.

  The diameter of the recessed hole 12 is preferably about 8 to 40 mm, particularly about 15 to 30 mm. The thickness of the smallest ridge 13 between adjacent concave holes 12 is preferably 2 to 20 mm, particularly 4 to 10 mm. The opening area of the concave hole 12, the height of the ridge 13 (depth of the concave hole 12), the preferred range of the area ratio of the top surface of the ridge 13, the preferred material of the seat pad, etc. are shown in FIGS. This is the same as the embodiment shown in the figure.

  When the ridges extend in three directions as shown in FIGS. 5 and 6, the anisotropy when the lower thighs abut is smaller than that in which the ridges extend in two directions.

[Embodiment in which a convex portion is provided by providing a groove in the lower right thigh]
In the above embodiment, the lower right thigh is softened by providing a concave hole, but the lower right thigh may be softened by providing a groove and providing a convex portion.
FIG. 7 is a perspective view of the lower right thigh according to this embodiment, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG.

  7 and 8, a plurality of convex portions 19 are provided by providing grooves 18 extending in the orthogonal direction on the upper surface of the lower right thigh lower portion 7. The groove 18 is a square groove having a square cross section perpendicular to the bearing surface, and the convex portion 19 has a square shape with a uniform horizontal cross section from the base end (lower end) to the tip end (upper end). However, the convex portion 19 may have a cross-sectional shape in which the width of the upper end is smaller than that of the lower portion.

  7 and 8, the grooves 18 extend in the front-rear direction and the left-right direction of the seat pad. However, the grooves 18 may extend obliquely with respect to the front-rear direction, for example, 45 °. Good.

The average height d of the protrusions 19, that is, the average depth d of the grooves 18 is 5 to 20 mm, particularly 10 to 15 mm, the average width e of the grooves 8 is 5 to 20 mm, particularly 10 to 15 mm, and the dimension f of one side of the top surface is 5 to 20 mm, particularly 10 to 15 mm, and the top surface area is preferably 25 to 400 mm ^2, particularly 100 to 225 mm ² .

  The volume ratio of the convex portion 19 is also preferably about 10 to 80%, particularly about 40 to 60%. The plan view shape of the convex portion may be any of a triangle, a square, a rectangle, a polygon, a circle, an ellipse, a long band, and the like.

The vehicle seat pad is preferably formed of a polyurethane foam having a density of 35 to 100 kg / m ^3, particularly 60 to 70 kg / m ³ , and a 25% ILD hardness of 15 to 45 kgf / 200 mmφ, particularly 15 to 35 kgf / 200 mmφ.

  In order to form the convex portion 19, it may be molded using a mold provided with a concave portion for forming the convex portion. However, a plate-like body having a large number of holes penetrating in the thickness direction is arranged on the cavity surface of the lower die. It is preferable to keep it.

  In the above embodiment, the upper surface of the lower right thigh 7 is provided with unevenness, but the lower surface (bottom surface) of the seat pad below the lower right thigh 7 may be provided with unevenness so as to be softened. Concavities and convexities may be provided on both sides.

  In the present invention, at least the side bank portion on the door side may be made soft by providing the same unevenness on the surface of the side bank portion. In this way, the side bank portion is easily deformed when the door is opened and exited, and the boarding / exiting operation is facilitated.

  Hereinafter, examples and comparative examples will be described. For convenience, Comparative Example 1 will be described first.

Comparative Example 1
A seat pad made of polyurethane foam having a density of 64 kg / m ³ and 25% hardness of 24 kgf / 200 mmφ was manufactured, and a load-stroke curve of the seating surface was obtained. In this measurement, a loader having a diameter of 200 mm was used, and this loader was pressed against the seat surface at a speed of 0.8 mm / sec, and the reaction force was measured. The results are shown in FIG. In addition, since a concave hole does not exist, the volume ratio of a protruding item | line is 100%.

Example 1
By providing a convex portion on the molding surface (cavity surface) of the lower right thigh of the molding die, the same urethane stock solution as in Comparative Example 1 is used, and a circular concave portion shown in FIG. A seat pad with soft lower thigh was manufactured. The size of the area of the lower right thigh 7 is 300 mm (front-rear direction) × 200 mm (left-right direction). The diameter of the concave hole 12 was 12 mm, the depth was 5 mm, and the distance between the centers of the adjacent concave holes 12 was 19 mm. The volume ratio of the ridges 13 is 70%. A loader was pressed against the lower right thigh in the same manner as in Comparative Example 1 to obtain a load-stroke curve. The results are shown in FIG.

Example 2
The seat pad was formed in the same manner as in Example 1 except that the diameter of the concave hole 12 was 19 mm, the depth was 5 mm, the distance between the centers of the adjacent concave holes 12 was 26 mm, and the volume ratio of the ridges 13 was 50%. Manufactured.

Example 3
The seat pad was formed in the same manner as in Example 1 except that the diameter of the concave hole 12 was 24 mm, the depth was 5 mm, the distance between the centers of the adjacent concave holes 12 was 30 mm, and the volume ratio of the ridges 13 was 40%. Manufactured.

Example 4
The seat pad was formed in the same manner as in Example 1 except that the diameter of the concave hole 12 was 28 mm, the depth was 5 mm, the distance between the centers of the adjacent concave holes 12 was 32 mm, and the volume ratio of the ridges 13 was 25%. Manufactured.

  A loader was pressed against the lower right thigh of the seat pads of Examples 2 to 4 in the same manner as in Comparative Example 1 to obtain a load-stroke curve. The results are shown in FIG.

[Discussion]
As shown in FIG. 9, the lower right thigh of the seat pads of Examples 1 to 4 is softer than Comparative Example 1. It is also recognized that the smaller the volume ratio of the ridges, the softer. The residual strain after 50% compression for 22 hours in a constant temperature and humidity chamber of 50 ° C. and 95% humidity was measured for the lower right thigh of each seat pad, and the results are shown in FIG.

  Further, in Example 2, when the R edge of R = 3.5 mm was applied to the base edge side and the tip edge side of the ridge, the compressive residual strain may be reduced from 19.8% to 18.8%. Admitted.

It is a top view of the seat pad for vehicle driver's seats concerning an embodiment. It is an expansion perspective view of a seat surface. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which shows another shape of a recessed hole and a protruding item | line. It is a top view which shows another shape of a recessed hole and a protruding item | line. It is a top view which shows another shape of a recessed hole and a protruding item | line. It is a perspective view which shows another embodiment. It is the VIII-VIII sectional view taken on the line of FIG. It is a graph which shows the result of an Example and a comparative example. It is a graph which shows the result of an Example and a comparative example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat pad for driver's seat 2 Thigh lower part 3 Bottom lower part 8, 10, 12 Recessed hole 9, 11, 13 Protrusion 18 Groove 19 Protrusion

Claims (22)

  A vehicle driver's seat pad comprising a resin foam molded body, wherein the lower right thigh is made more flexible than its surroundings.   The vehicle driver's seat pad according to claim 1, wherein the lower right thigh is made more flexible than the surrounding area by providing irregularities on the upper or lower surface of the lower right thigh.   3. The vehicle driver's seat according to claim 2, wherein a plurality of concave holes are provided in the upper surface or the lower surface of the lower right thigh so that a plurality of ridges extending in a plurality of directions are provided between the concave holes. Seat pad.   4. The vehicle driver's seat pad according to claim 3, wherein the volume ratio of the ridges at the lower right thigh is 10 to 80%.   4. The vehicle driver's seat pad according to claim 3, wherein the volume ratio of the ridges in the lower right thigh is 40 to 60%.   The vehicle driver's seat pad according to any one of claims 3 to 5, wherein an average depth of the recessed holes is 2 to 40 mm.   The vehicle driver's seat pad according to any one of claims 3 to 6, wherein the protrusions extend in a plurality of directions.   8. The vehicle driver's seat pad according to claim 7, wherein the ridges extend in two or three directions. The vehicle driver's seat pad according to any one of claims 3 to 7, wherein an opening area of one recessed hole is 40 to 1000 mm ² .   The vehicle driver's seat pad according to any one of claims 3 to 9, wherein the concave hole is a triangle, a square, a polygon, a long hole, or a circle.   11. The vehicle driver's seat pad according to any one of claims 3 to 10, wherein a corner edge where a top surface and a side surface of the ridge intersect is a curved surface.   The vehicle driver's seat pad according to any one of claims 3 to 11, wherein a corner edge where a side surface of the ridge and a bottom surface of the ridge intersect is a curved surface.   13. The vehicle driver's seat pad according to any one of claims 3 to 12, wherein the ridge has a cross-sectional shape in which an upper width is smaller than a lower width.   3. A vehicle driver's seat according to claim 2, wherein a groove is provided on an upper surface or a lower surface of the lower right thigh, and a convex portion is formed between the grooves so that the lower right thigh is more flexible than the surrounding area. Seat pad.   15. The vehicle driver's seat pad according to claim 14, wherein the groove has an average width of 5 to 20 mm and a groove depth of 5 to 20 mm.   The vehicle driver's seat pad according to claim 15, wherein the volume ratio of the convex portion at the lower right thigh is 10 to 80%.   The vehicle driver's seat pad according to any one of claims 14 to 16, wherein the groove extends in a plurality of directions.   18. The vehicle driver's seat pad according to any one of claims 14 to 17, wherein a corner edge where the top surface and the side surface of the convex portion intersect is a curved surface.   The vehicle driver's seat pad according to any one of claims 14 to 18, wherein a corner edge where a side surface of the convex portion and a bottom surface of the groove intersect is a curved surface.   The seat pad for a vehicle driver's seat according to any one of claims 14 to 19, wherein the groove has a cross-sectional shape in which a width of a bottom portion is smaller than that of an upper portion.   21. A vehicle driver seat according to any one of claims 1 to 20, wherein the lower thigh is made more flexible than the lower thigh, and the lower right thigh is made more flexible than the other thighs in the lower thigh. pad. In any one of claims 1 to 21, a vehicle driver's seat pad characterized by comprising a polyurethane foam density 35~100kg ^/ m 3, 25% ILD hardness 15~45kgf / 200mmφ.

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