The invention relates to an anti-tilt spring mechanism and tension mounting mechanism for a ball and socket mounting device (1), consisting of an outer ball shell (16) provided with a guide member (18) disposed in an outer housing (15); an inner ball (5) disposed in the outer ball shell (16) and having a neck portion (10), a slit (9) and a slide with bore (20); a socket (24), and a cap (17), with a mounting disc (2), provided with an adjustment screw (3), being attached to the neck portion (10) of the inner ball (5). The anti-tilt spring mechanism and tensioning mechanism are characterised in that one or more expediently configured elastic bodies inserted into the inner cavity (6) of the inner ball (5) are in contact with or attached to the guide member (18) of the outer ball shell (16) and the interior surface of the inner ball (5), such that the rotation of the inner ball (5) is counteracted by the torque produced by the force arising from the deformation of the elastic body effected by the rotation of the inner ball (5).