Timepiece movement provided with a device for positioning a moveable element in a plurality of discrete positions

A timepiece movement provided with a movable element capable of being driven along an axis of displacement and of being momentarily immobilized in any one stable position of N discrete stable positions, N being a number greater than one, and with a positioning device for positioning said movable element in each of said N stable positions comprising a lever capable of coming into contact with the movable element, wherein the positioning device comprises a magnetic system formed of a first magnet integral with the lever and arranged at a periphery of the movable element, with N second magnets integral with said movable element and arranged along said axis of displacement so as to define magnetic periods respectively corresponding to distances between the N discrete stable positions, and with a highly magnetically permeable element arranged facing one polar end of the first magnet located on a side of the movable element;

• in that the magnetic system is arranged such that, when the movable element is driven along its axis of displacement, from any one stable position to a next stable position, a first magnetic torque exerted on the lever carrying the first magnet has a first direction over a first section and a second direction, opposite to the first direction, over a second section of the corresponding distance, the first direction defining a return torque towards the movable element for a contact portion of the lever;
• and in that the magnetic system is arranged such that, for each of the N discrete stable positions, said first magnetic torque is applied in said first direction.