Patent ID: 7967381

Claim:
A vehicle seat provided with a system for facilitating relieving of fatigue of a driver on said seat driving a vehicle, said vehicle seat comprising a seat back having a pad; said system comprising: sensors provided in said seat back; said sensors being adapted to detect an amount of variation in an angle of the pelvis of the driver when the driver moves his/her body due to the fatigue of the driver during the driving of the vehicle for many hours; an occupant's body-motion promoting means provided in said seat back so as to be arranged behind said pad for pressing the third lumbar vertebrae of the driver and releasing the driver's body from pressure, during the driving of the vehicle, thereby moving the driver's body and promoting blood circulation of the driver; and an operation means having a section electrically connected to said sensors and a section connected to said occupant's body-motion promoting means, said operation means being configured to actuate said occupant's body-motion promoting means according to instructions from said sensors when said sensors detect said amount of variation in the angle of the pelvis of the driver during the driving of the vehicle, in such a manner that said occupant's body-motion promoting means intermittently performs repeated pressing/releasing operations with respect to the third lumbar vertebrae of the driver in a range of three to seven times, at a stroke amount in a range of 10 mm to 20 mm, and at a time interval of 5 minutes to 10 minutes, whereby the driver's body is moved and the blood circulation of the driver is promoted.