Seat pad and seat for vehicle

Abstract

Ridge portions 9 are provided to be continuously present in orthogonally intersecting directions by forming plural recessed holes 8 in the upper surface of an under-thighs portion 2 and an under-buttocks portion 3 of a seat pad 1 for a vehicle. The height of each ridge portion 9 , i.e. the depth h of each recessed hole 8 , is preferably in the range of 2 to 40 mm, more preferably in the range of 5 to 20 mm, the width w of each recessed hole 8 is preferably in the range of 10 to 30 mm, more preferably in the range of 20 to 30 mm, and the area of an opening of each recessed hole 8 is preferably in the range of 50 to 1000 mm 2 , more preferably in the range of 100 to 900 mm 2 . Accordingly, the present invention can provide a seat pad, which is excellent in soft sensation of touch of a surface thereof, satisfactory in the properties of supporting an occupant, and can be produced by integral foam molding.

1 . A seat pad formed of resin foam molding, for use in a vehicle, comprising:
 ridge portions having flat top surfaces and provided to be continuously present in plural directions, the ridge portions being provided between a number of recessed holes formed at least in a part of an occupant contact surface area of the seat pad.   
   
   
       2 . The seat pad for a vehicle of  claim 1 , wherein the total of areas of the top surfaces of the respective ridge portions constitute 20 to 80% of the total area of the recessed holes and the ridge portions. 
   
   
       3 . The seat pad for a vehicle of  claim 2 , wherein the total of areas of the top surfaces of the respective ridge portions constitute 20 to 50% of the total area of the recessed holes and the ridge portions. 
   
   
       4 . The seat pad for a vehicle of  claim 1 , wherein the depth of each recessed hole is in the range of 2 to 40 mm. 
   
   
       5 . The seat pad for a vehicle of  claim 4 , wherein the depth of each recessed hole is in the range of 5 to 20 mm. 
   
   
       6 . The seat pad for a vehicle of  claim 1 , wherein the area of an opening of each recessed hole is in the range of 50 to 1000 mm 2  and the width of each ridge portion is in the range of 2 to 10 mm. 
   
   
       7 . The seat pad for a vehicle of  claim 6 , wherein the area of an opening of each recessed hole is in the range of 100 to 900 mm 2  and the width of each ridge portion is in the range of 2 to 10 mm. 
   
   
       8 . The seat pad for a vehicle of  claim 1 , wherein the recessed holes and the ridge portions are provided at least in an under-thighs portion of the seat pad. 
   
   
       9 . The seat pad for a vehicle of  claim 1 , wherein the ridge portions are provided to be continuously present in two intersecting directions. 
   
   
       10 . The seat pad for a vehicle of  claim 9 , wherein the ridge portions are provided to be continuously present in two orthogonally intersecting directions. 
   
   
       11 . The seat pad for a vehicle of  claim 10 , wherein each recessed hole has a square shape. 
   
   
       12 . The seat pad for a vehicle of  claim 1 , wherein the ridges are provided to be continuously present in three directions. 
   
   
       13 . The seat pad for a vehicle of  claim 12 , wherein each recessed hole has a triangular, polygonal, circular or substantially ellipsoidal shape. 
   
   
       14 . The seat pad for a vehicle of  claim 12 , wherein each recessed hole has a hexagonal shape. 
   
   
       15 . A seat pad formed by a resin foam molding body, for use in a vehicle, comprising:
 plural recessed holes formed at least in a part of an occupant contact surface area or a part of the rear surface area opposite to the occupant contact surface of the seat pad.   
   
   
       16 . The seat pad for a vehicle of  claim 15 , wherein the depth of each recessed hole is in the range of 2 to 40 mm. 
   
   
       17 . The seat pad for a vehicle of  claim 15 , wherein the area of an opening of each recessed hole is in the range of 50 to 1000 mm 2 . 
   
   
       18 . The seat pad for a vehicle of  claim 15 , wherein each recessed hole has a triangular, square, polygonal, circular or elongated hole-like shape. 
   
   
       19 . The seat pad for a vehicle of  claim 15 , wherein portions between the recessed holes constitute ridge portions. 
   
   
       20 . The seat pad for a vehicle of  claim 19 , wherein the width of each ridge portion is in the range of 2 to 10 mm. 
   
   
       21 . The seat pad for a vehicle of  claim 19 , wherein the ridge portions are provided to be continuously present in two intersecting directions. 
   
   
       22 . The seat pad for a vehicle of  claim 19 , wherein the ridge portions are provided to be continuously present in three directions. 
   
   
       23 . The seat pad for a vehicle of  claim 22 , wherein each recessed hole has a hexagonal shape. 
   
   
       24 . The seat pad for a vehicle of  claim 19 , wherein a volume rate of the ridge portions in a region where the recessed holes and the ridge portions are provided is in the range of 10 to 80%. 
   
   
       25 . The seat pad for a vehicle of  claim 24 , wherein the volume rate of the ridge portions is in the range of 40 to 60%. 
   
   
       26 . The seat pad for a vehicle of  claim 19 , wherein the ridge portions have flat top surfaces. 
   
   
       27 . The seat pad for a vehicle of  claim 19 , wherein at least one of a corner edge where the top surface and a side surface of each ridge portion intersects each other and a corner edge where a side surface of each ridge portion and the bottom surface of an adjacent recessed hole intersects each other has a curved surface. 
   
   
       28 . The seat pad for a vehicle of  claim 19 , wherein a sectional area of an opening of each recessed hole remains substantially unchanged from an entrance portion to the deepest bottom portion thereof. 
   
   
       29 . The seat pad for a vehicle of  claim 19 , wherein a sectional area of an opening on the deeper side of the each recessed hole is smaller than a sectional area of the opening on the entrance side of the recessed hole. 
   
   
       30 . The seat pad for a vehicle of  claim 19 , wherein the seat pad is formed of polyurethane foam having density of 20 to 100 kg/cm 3 , 25% ILD hardness of 5 to 45 kgf/200 mmφ. 
   
   
       31 . The seat pad for a vehicle of  claim 30 , wherein the seat pad is formed of polyurethane foam having density of 35 to 100 kg/cm 3 , 25% ILD hardness of 15 to 45 kgf/200 mmφ. 
   
   
       32 . The seat pad for a vehicle of  claim 15 , wherein the recessed holes are formed at least in a part of an occupant contact surface area. 
   
   
       33 . The seat pad for a vehicle of  claim 32 , wherein the seat pad is a seat cushion pad, in which a corner edge region where a sitting surface and a front surface thereof intersect each other lacks the recess holes. 
   
   
       34 . The seat pad for a vehicle of  claim 33 , wherein the corner edge region is a region having a radius of curvature of 100 mm or less. 
   
   
       35 . The seat pad for a vehicle of  claim 32 , wherein the recessed holes are provided at least in an under-thighs portion of the seat pad. 
   
   
       36 . The seat pad for a vehicle of  claim 35 , wherein the recessed holes are formed such that a portion under the right thigh, of the under-thighs portion, is softer than other portions of the under-thighs portion. 
   
   
       37 . The seat pad for a vehicle of  claim 32 , wherein the recessed holes are formed only in a portion under the right thigh, of the seat pad. 
   
   
       38 . The seat pad for a vehicle of  claim 32 , wherein the recessed holes are formed in a front surface which is to face the lower parts of legs of an occupant. 
   
   
       39 . The seat pad for a vehicle of  claim 15 , wherein the recessed portions are formed at least in a part of the rear surface area opposite to the occupant contact surface. 
   
   
       40 . The seat pad for a vehicle of  claim 39 , wherein the recessed holes are formed at least in a bottom surface below the under-thighs portion. 
   
   
       41 . The seat pad for a vehicle of  claim 40 , wherein the recessed holes are formed such that a portion under the right thigh, of the under-thighs portion, is softer than other portions of the under-thighs portion. 
   
   
       42 . The seat pad for a vehicle of  claim 39 , wherein the recessed holes are formed only in the bottom portion below the portion under the right thigh, of the seat pad. 
   
   
       43 . A seat for a vehicle, having a cushion pad and a back pad constituted of the seat pad of  claim 32 , characterized in that recessed holes in the back pad is deeper than recessed holes in the cushion pad. 
   
   
       44 . The seat pad for a vehicle of  claim 43 , wherein the recessed holes are formed at least in an under-thighs portion of the cushion pad and a back contact portion of the back pad. 
   
   
       45 . A seat for a vehicle, having a cushion pad and a back pad constituted of the seat pad of  claim 39 , characterized in that recessed holes in the back pad is deeper than recessed holes in the cushion pad. 
   
   
       46 . A seat for a vehicle of  claim 45 , wherein the recessed holes are formed at least in a bottom surface below an under-thighs portion of the cushion pad and a rear surface behind a back contact portion of the back pad.