the window pane f and as previously explained by means of fig6 b is housed between the said carrier arm 51 and the extension 7 in a clamping manner in the fig8 a and 8b a further modification of the arrangement from fig6 a is illustrated in which a trigger element 8 serves simultaneously as insert for the window pane f in its not illustrated in the fig8 a and 8b functional position the trigger element 8 comprises here a hinge 83 in form of a film hinge in order to trigger during the impact of the window pane a folding of the extension 7 towards the opposing arm 51 of the carrier 5 the trigger element 8 which serves at the same time as insert here in form of a longitudinal element 80 u2033 equipped with a hinge is thereby at present guided movably at the fixing area 81 at the side of an extension pin 75 of the extension 7 so that it can be docked at the transition region 70 of the extension 7 while the window pane f acts thereon in fig9 finally an embodiment of a carrier 5 is illustrated wherein the extension 7 of said carrier continues on one hand tilted to the adjustment path v of an assigned window pane f as well as to the window pane f itself and wherein the extension 7 of said window pane is on the other hand essentially rigidly connected to the carrier 5 that means it cannot be folded towards the inserted window pane the.