Abstract: A spindle, particularly for winding up a strap in a safety belt for vehicles, comprising a first portion which is provided with an opening for the strap and which is arranged to give the spindle the necessary strength, and a second portion which together with the first portion forms a spindle having a substantially round cross section.

Abstract: A locking device for vehicle safety seat belts of the type in which a strap of the seat belt is automatically retracted and wound onto a wind-up shaft when the seat belt is not in use, for preventing rapid extension of the strap. The device comprises a rotatable body rigidly attached to one end of the shaft and arranged to rotate with the shaft; a stop means positioned outside the rotatable body and fixedly mounted in relation to the shaft; and at least one elongated locking member movable in relation to the rotatable body and positioned between the rotatable body and the stop means. The locking member is movable on a guiding surface on the rotatable body from a radially seen inner position, free position, in which it does not prevent rotation of the rotatable body, to a radially seen outer position, locking position, in which it engages with both the stop means and the rotatable body and, thus, prevents further turning of the rotatable body.