Pneumatically controlled seat for vehicle

Abstract

Disclosed is a seat for vehicle which is pneumatically controlled for a desired body pressure distribution of a person seated in the seat, comprising: a plurality of air bags embedded in a seat; an air pressure source; a single first conduit connected the air pressure source at its one end and branched off into a plurality of second conduits leading to the air bags at its other end; a plurality of on-off valves each provided in the corresponding one of the second conduits leading to the air bags; an exhaust valve connected to the first conduit at its one end and to the atmosphere at its other end; a single pressure sensor provided in the first conduit; and control means connected to the air pressure source, the on-off valves, the exhaust valve and the pressure sensor; the control means comprising means for storing predetermined air pressure values for the air bags, means for selectively opening and closing the on-off valves and the exhaust valve, and means for preventing the valve opening and closing means for opening the valves according to the result of comparison between the output from the pressure sensor and predetermined air pressure values. Thus, the structure for air pressure control is simplified and the body pressure distribution of the passenger may be adapted to the acceleration of the vehicle and other conditions.