The stopper component of a universal joint swivel connector, for example, can be formed on the inner circumference of the outer bearing component. The stopper component is engaged in a locking manner corresponding to at least one groove-like depression on the outer circumference of the bearing component, within a specific adjustment position. Relative to this depression, particularly the depression on the outer circumference of the universal joint swivel connector bearing component, the stopperPartsUtilize pre-set positions or orientations, particularly the end positions when the cushion is in a horizontal or vertical orientation.It is also the end position of the rotatable bearing component of the universal joint. The stop components located on the inner circumference surface of the universal joint bearing component form, for example, deformable thickened portions of the material or, for example, ribs.