| 摘要 |
A winding attachment for passenger seat belts for use with a windable takeup roller over which the seat belt is wound and which includes a takeup roller shaft and a rotatable clutch disc which is connected to the shaft when the disc is rotated in a shaft tightening direction comprises a rotatable cylinder with a hollow cylindrical piston shaft relatively rotatable within the cylinder. The cylinder has a cylinder wing which is rotatable therewith and which is located within the cylinder and the piston shaft has a wing connected to it which rotates within the cylinder in a path which intersects the path of rotation of the cylinder wing. Propellant contained within the hollow cylinder is ignited and it produces propellant gases which expand in the cylinder against the cylinder wing in the piston shaft wing to produce relative rotation of the cylinder and piston shaft for a period of time until the wings meet causing the stopping of the rotation. A tension member is connected to one of the cylinder or piston shafts and to the clutch disc and during the time in which the cylinder and the piston shaft rotate relatively it drives the disc in a direction to cause tightening of the belt on the takeup roller. |
