The present invention relates to a vehicle seat belt, particularly to a vehicle seat belt in case that an external impact is applied to a vehicle seat belt can, even if the instantaneous pressure in the upper body of the passenger to prevent injury.
The present invention is provided with a tongue (tongue) coupled to the buckle to go free, and consists of the air bag in the form of hollow jidoe air inlet and an air inlet is formed, winding the belt on the occupant's upper body A; And one end is coupled to the belt A, the other end being connected to a retractor fixed to a vehicle body, the air inlet and in communication and the inlet tube through which air is injected and the air inlet and in communication and the suction pipe length inside which draws in air belt B are respectively formed along a direction; including and, when the tongue of the belt a coupled to a buckle by receiving a signal from a sensor of the control unit which are mounted to the buckle of air injectors installed in the vehicle body work through the inlet tube and injecting air to the belt a, when the air is injected by an amount predetermined on the belt a when the tone generated by the control unit, and the tongue of the belt a separated from the buckle signal from a sensor of the control unit which are mounted to the buckle and to have the transfer take air aspirator installed in the vehicle body work sucking the air filled in the belt a through the suction tube outside Sikimyeo discharged, if the injected air from the belt A discharge provides a vehicle seat belt which is characterized in that the tone generated by the control unit.