Patent ID: 7575206
Filing Date: 2009-08-18
Classification: B60N

Abstract:
1. Vehicle seat comprising at least one gas spring ( 9 ) which damps vibration and adjusts the seat height, said gas spring being arranged between a seat frame ( 1 ) and a base frame ( 2 ), and comprising a valve arrangement ( 43 , 44 ) for adjusting the pressure in the gas spring ( 9 ) and a compressor ( 45 ) assigned to the vehicle seat ( 17 , 20 , 23 ), said compressor having a drive motor for feeding compressed gas to the gas spring ( 9 ), wherein a belt roller device comprising a belt ( 11 ) rolled around an axle ( 12 ) is arranged between the seat frame ( 1 ) and the base frame ( 2 ), the first end ( 11 a ) of said belt being attached to a belt roller mechanism ( 10 ) arranged on the seat frame ( 1 ) and the second end ( 11 b ) of said belt being attached to the base frame ( 2 ), and a detector ( 16 ) which detects a belt rolling movement is attached to the seat frame ( 1 ), said vehicle seat being characterized by an electronic control unit ( 14 , 38 , 40 ) for evaluating belt rolling movement signals detected within a predefined time period ( 26 , 27 , 29 ) for determining a seat height profile within the time period ( 26 , 27 , 29 ) and for controlling the valve arrangement ( 43 , 44 ) and/or the compressor ( 45 ) such that automatic, time-delayed seat height re-adjustment takes place if the determined seat height profile ( 31 , 35 ) lies out of a position of symmetry in relation to a predefinable mean seat height ( 28 ), wherein the belt roller mechanism ( 10 ) is formed roller-like and has a magnetic strip ( 13 ) on the circumference, the individual positions of which can be detected by a detector ( 16 ) which is fitted in a stationary manner on the seat frame.