Seat construction

Abstract

The invention relates to a seat construction comprising a seat cushion part and a backrest part, and: a presence sensor for detecting at least the presence of a person or an object placed in the said seat construction, means for ventilating the seat construction comprising at least one duct through the said presence sensor and at least one air passage through the rest of the seat construction, and a device for feeding an air current through the said air passage and through the said duct for ventilation of a predetermined region adjacent to the seat construction. According to the invention, the seat construction comprises a layer of an air-distributing material disposed between the said presence sensor and the said air-current-feeding device, whereby a flow path is provided for the said air current through the air passage, the duct, the said layer of air-distributing material and the said air-current-feeding device. As a result of the invention, an improved seat construction is provided, having a presence sensor, which also allows ventilation of the vehicle seat in an advantageous manner.

1 . Seat construction comprising a seat cushion part and a backrest part and: a presence sensor for detecting at least the presence of a person or an object placed in the said seat construction, means for ventilating the seat construction comprising at least one duct through the said presence sensor and at least one air passage through the rest of the seat construction, and a device for feeding an air current through the said air passage and through the said duct for ventilation of a predetermined region adjacent to the seat construction, wherein the seat construction comprises a layer of an air-distributing material disposed between the said presence sensor and the said air-current-feeding device, whereby a flow path is provided for the said air current through the air passage, the duct, the said layer of air-distributing material and the said air-current-feeding device.  
   
   
       2 . Seat construction according to  claim 1 , wherein the said presence sensor is additionally set up to detect the weight and the weight distribution of the said person or object.  
   
   
       3 . Seat construction according to  claim 1 , wherein the said presence sensor comprises a pressure transducer.  
   
   
       4 . Seat construction according to  claim 3 , wherein the said pressure transducer comprises a connection to a control unit for controlling the working of an airbag in dependence on detected signals from the said presence sensor.  
   
   
       5 . Seat construction according to  claim 1 , wherein the said air-current-feeding device is constituted by a suction fan.  
   
   
       6 . Seat construction according to  claim 1 , wherein the said air-current-feeding device is constituted by a blowing fan.  
   
   
       7 . Seat construction according to  claim 1 , wherein the said layer of air-distributing material has its extent along the bottom side of the said presence sensor and in that the said air-current-feeding device is connected to the said layer of air-distributing material.  
   
   
       8 . Seat construction according to  claim 1 , wherein an additional layer of air-distributing material is arranged with its extent on top of the said presence sensor.