Vehicle seat air conditioning system

Abstract

In a vehicle seat air conditioning system, when air blows, discomfort in seating caused by the presence of an air-blowing unit is reduced and a depression is nearly avoided in the surface cover material. The system utilizes a surface cover material, a cushion member positioned on a backside of the surface cover material, an air-blowing hole penetrating through the thickness of said cushion member, an air-blowing unit positioned on a backside of said cushion member to supply air to said air-blowing hole, and a support portion, which is integral with the cushion member and that supports the surface cover material, provided in a position of said air-blowing hole. The size of an air-blowing hole proximate to the support portion is smaller than the size of an air-blowing hole proximate said air-blowing unit.

What is claimed is:  
     
         1 . A vehicle seat air conditioning system, comprising: 
 a surface cover material forming a surface against which a passenger contacts;    a cushion member positioned on a side of said surface cover material to function as cushioning for a passenger, wherein said cushion member defines an air-blowing hole penetrating through said cushion member in a cushion thickness direction; and    an air-blowing unit positioned on a side of said cushion member to supply air to said air-blowing hole, wherein 
 in a position of said air-blowing hole on a side of said surface cover material, a support portion that supports said surface cover material is provided,  
 a size of the air-blowing hole on a side of the support portion is smaller than a size of the air-blowing hole on a side of said air-blowing unit, and  
 said support portion is formed integrally with said cushion member.  
   
     
     
         2 . The vehicle seat air conditioning system according to  claim 1 , wherein 
 in a position of said air-blowing hole on the side of said surface cover material, a plurality of hole portions are defined by said support portion, and a cross-sectional area of each said hole portion is smaller than a cross-sectional area of the air-blowing hole on the side of said air-blowing unit.    
     
     
         3 . The vehicle seat air conditioning system according to  claim 1 , wherein 
 only a single hole portion is defined by said support portion in a position of said air-blowing hole on the side of said surface cover material, and a cross-sectional area of said single hole portion is smaller than a cross-sectional area of the air-blowing hole on the side of said air-blowing unit.    
     
     
         4 . The vehicle seat air conditioning system according to  claim 2 , wherein 
 an entire outer periphery of said plurality of hole portions is larger than an outer periphery of the air-blowing hole on the side of said air-blowing unit, and said plurality of hole portions are provided to expand outwardly.    
     
     
         5 . The vehicle seat air conditioning system according to  claim 1 , wherein 
 a thickness size of said support portion in an air flow direction is 10% to 70% of a thickness size of said cushion member.    
     
     
         6 . The vehicle seat air conditioning system according to  claim 1 , wherein 
 a cross-sectional area of the air-blowing hole on the side of said air-blowing unit is approximately equal to or larger than a blade size of the air-blowing fan that supplies air in said air-blowing unit.    
     
     
         7 . The vehicle seat air conditioning system according to  claim 1 , wherein 
 an electric heater is provided on the back side of said surface cover material.    
     
     
         8 . The vehicle seat air conditioning system according to  claim 1 , wherein 
 a protrusion protruding toward said air-blowing unit from the opening of the air-blowing hole for the entire circumference is provided on the back side of said cushion member, and    an air outlet portion to let out air supplied from said air-blowing unit is fitted to said protrusion.    
     
     
         9 . The vehicle seat air conditioning system according to  claim 1 , wherein 
 said surface cover material is provided at a surface of a seat backrest portion that supports a back of the passenger, and    said backrest portion includes said cushion member placed on the back side of said surface cover material.