Safety belt devices for vehicles

Claim 1

A safety belt device for vehicles, comprising: a first safety belt retractor provided on the inner surface of a door of a vehicle at a location opposite the outer side of a seat adjacent said door; a second safety belt retractor fixed to the central portion of a vehicle body; a first safety belt having one end connected to said first retractor and extending from said first retractor across said seat with the other end thereof secured to the inner side of the seat; a second safety belt having one end connected to said second retractor and extending obliquely from said second retractor across the chest portion of a passenger with the other end thereof secured to the upper portion of a door framework of the vehicle; and a belt driving mechanism wholly positioned in a portion of the door and including a motor which drives a pulley drum and a cup ring, a first drawing member connected to said first safety belt and moved by said motor around said pulley drum and two other pulley drums spaced apart from each other, a second drawing member connected to said second safety belt and moved by said motor around said cup ring and along the door framework of the vehicle at the same time said first drawing member is moved, a door switch incorporated in a door lock for controlling the direction of rotation of said motor, a seat switch provided below the seat and actuated to close a motor driving circuit when a passenger sits down on the seat, a first stop swich for controlling said motor in cooperation with a first actuator and a first stopper which is fixed to said first drawing member at a predetermined location between one of said two other pulley drums and said first actuator, and a second stop switch for controlling said motor in cooperation with a second actuator and a second stopper which is fixed to said first drawing member at a predetermined location between the other of said two other pulley drums and said second actuator, and said motor being set in motion by said door switch in timed relation with a door opening operation, whereby when the door is closed, said first safety belt and said second safety belt are retracted into said first retractor and said second retractor, respectively, and placed in their engaging position to restrain the waist and the chest portions of a passenger sitting on the seat.