Safety binding for ski boot

A combination safety binding and ski boot, the ski boot having a sole and a long axis, wherein

• the sole of the boot has a flange, and wherein the boot is equipped with a permanent magnet or ferromagnetic material disposed therein asymmetrically about the long axis thereof, and
• wherein the binding comprises a binding body of which a horizontal part, intended for vertical support of the boot and extending under the boot, contains a pair of movable pistons biased by elastic means, and another part carries a sole clamp for holding the boot via its flange, this sole clamp being mounted so as to pivot about at least one at least approximately vertical axis in order to release the boor, and pivoting by an angle limited in a vertical plane about a real or virtual axis located at die location of holding of the boot by the sole clamp, this sole clamp being equipped with two descending arms rigidly connected to the sole clamp, the ends of which bear respectively on each of the pistons, wherein the elastic means comprises two parallel springs on which each of the pistons bear, respectively, wherein the pistons are interconnected by a linking means, and wherein the binding comprises means for controlling this linking means which are capable of occupying a first position, in which the pistons are secured by the linking means, and a second position in which one of the pistons is able to move on its own, at least over a certain travel common to the two pistons and over at least a portion of the total travel of the two pistons, the control means comprising components made from a permanent magnet or ferromagnetic material asymmetrically disposed about the long axis with respect to a corresponding permanent magnet or ferromagnetic material in the boot.