Motor Vehicle Seat

Abstract

The invention relates to a motor vehicle seat comprising a back rest ( 11 ), a height-adjustable head rest ( 12 ), and an aeration device ( 13 ) that is integrated into the back rest and comprises a blow opening ( 16 ) arranged in the upper side ( 111 ) of the back rest ( 11 ) and used to blow out hot air. The aim of the invention is to improve the aeration device by reducing the aeration noises and generating a comfortable warm feeling for the user of the seat, in the head, neck and shoulder region. To this end, a diffuser ( 19 ) is arranged in the intermediate space between the back rest ( 11 ) and the head padding ( 15 ) of the head rest ( 12 ), said diffuser being embodied and oriented in relation to the blow opening in such a way that the hot air flow through the blow opening towards the head padding is deflected into a wide, diffuse hot air flow flowing around the head, neck and shoulder area of a user ( 10 ). The length of the diffuser ( 19 ) can be varied and the diffuser itself is fixed to the lower side ( 151 ) of the head padding ( 15 ) and to the upper side ( 11 ) of the back rest ( 11 ), so that it is involved in the height adjustment of the head rest.

1 - 11 . (canceled) 
     
     
         12 . A vehicle seat comprising:
 a backrest,   a height-adjustable head restraint which has a supporting hoop with two parallel supporting rods guided in the backrest and a head cushion held on the supporting hoop,   a ventilation device which has a blow-out opening arranged in an upper side of the backrest for blowing out a hot air stream, and   a diffuser arranged in an intermediate space between the backrest and the head cushion which blocks off the intermediate space to the rear and is designed and oriented relative to the blow-out opening in such a manner that the hot air stream emerging from the blow-out opening in the direction of the head cushion is altered into a spread-apart, diffuse hot air flow spreading out to a neck and rear head region of a seat user.   
     
     
         13 . The vehicle seat as claimed in  claim 12 , wherein the diffuser is variable in length and is fixed on the upper side of the backrest and on a lower side of the head cushion. 
     
     
         14 . The vehicle seat as claimed in  claim 12 , wherein, in a transverse direction of the seat, the diffuser covers a region between the two supporting rods of the supporting hoop of the head restraint. 
     
     
         15 . The vehicle seat as claimed in  claim 12 , wherein the diffuser is designed as stretched cloth which is inclined with respect to the upper side of the backrest and extends from a rear edge of the upper side of the backrest as far as a front edge of a lower side of the head cushion. 
     
     
         16 . The vehicle seat as claimed in  claim 15 , wherein the cloth is pulled off from a reel of cloth wound up on a resetting roller-blind-type rod. 
     
     
         17 . The vehicle seat as claimed in  claim 15 , wherein the cloth is a pleated cloth which can be expanded in the manner of a concertina and has folds running in a transverse direction of the seat. 
     
     
         18 . The vehicle seat as claimed in  claim 12 , wherein the diffuser is formed by an expansion bellows which surrounds the supporting rods of the head restraint and the blow-out opening, is fastened on an end side on the upper side of the backrest and to a lower side of the head cushion, and is open continuously longitudinally to the front toward the neck and head region of the seat user. 
     
     
         19 . The vehicle seat as claimed in  claim 12 , wherein the blow-out opening arranged in the upper side of the backrest is a mouth opening of a pressure connection of a suction fan of the ventilation device, and wherein the suction fan is integrated in the backrest. 
     
     
         20 . The vehicle seat as claimed in  claim 12 , wherein the diffuser is formed by a blow-out duct which surrounds the blow-out opening in the upper side of the backrest, enters the backrest in an axially displaceable manner, extends as far as a lower side of the head cushion and is fastened to the latter, and wherein, in a duct section extending between the upper side of the backrest and the lower side of the head cushion, the blow-out duct is open forward toward the neck and head region of a seat user. 
     
     
         21 . The vehicle seat as claimed in  claim 20 , wherein the blow-out duct is curved forward at least in its end region facing the head cushion. 
     
     
         22 . The vehicle seat as claimed in  claim 20 , wherein the air blow-out opening in the upper side of the backrest is the mouth opening of a pressure connection of a suction fan of the ventilation device, which suction fan is integrated in the backrest, and wherein the blow-out duct is guided by its end section, which enters the backrest, in a telescopically displaceable manner on the pressure connection. 
     
     
         23 . The vehicle seat as claimed in  claim 13 , wherein the blow-out opening arranged in the upper side of the backrest is a mouth opening of a pressure connection of a suction fan of the ventilation device, and wherein the suction fan is integrated in the backrest. 
     
     
         24 . The vehicle seat as claimed in  claim 14 , wherein the blow-out opening arranged in the upper side of the backrest is a mouth opening of a pressure connection of a suction fan of the ventilation device, and wherein the suction fan is integrated in the backrest. 
     
     
         25 . The vehicle seat as claimed in  claim 15 , wherein the blow-out opening arranged in the upper side of the backrest is a mouth opening of a pressure connection of a suction fan of the ventilation device, and wherein the suction fan is integrated in the backrest. 
     
     
         26 . The vehicle seat as claimed in  claim 16 , wherein the blow-out opening arranged in the upper side of the backrest is a mouth opening of a pressure connection of a suction fan of the ventilation device, and wherein the suction fan is integrated in the backrest. 
     
     
         27 . The vehicle seat as claimed in  claim 17 , wherein the blow-out opening arranged in the upper side of the backrest is a mouth opening of a pressure connection of a suction fan of the ventilation device, and wherein the suction fan is integrated in the backrest. 
     
     
         28 . The vehicle seat as claimed in  claim 18 , wherein the blow-out opening arranged in the upper side of the backrest is a mouth opening of a pressure connection of a suction fan of the ventilation device, and wherein the suction fan is integrated in the backrest. 
     
     
         29 . The vehicle seat as claimed in  claim 13 , wherein, in a transverse direction of the seat, the diffuser covers a region between the two supporting rods of the supporting hoop of the head restraint. 
     
     
         30 . The vehicle seat as claimed in  claim 13 , wherein the diffuser is formed by a blow-out duct which surrounds the blow-out opening in the upper side of the backrest, enters the backrest in an axially displaceable manner, extends as far as a lower side of the head cushion and is fastened to the latter, and wherein, in a duct section extending between the upper side of the backrest and the lower side of the head cushion, the blow-out duct is open forward toward the neck and head region of a seat user. 
     
     
         31 . The vehicle seat as claimed in  claim 14 , wherein the diffuser is formed by a blow-out duct which surrounds the blow-out opening in the upper side of the backrest, enters the backrest in an axially displaceable manner, extends as far as a lower side of the head cushion and is fastened to the latter, and wherein, in a duct section extending between the upper side of the backrest and the lower side of the head cushion, the blow-out duct is open forward toward the neck and head region of a seat user.