Flexible escapement mechanism with movable frame

An escapement mechanism for a timepiece movement or timepiece including at least one balance and at least one escape wheel,

• wherein transmission of impulses between the at least one balance and the at least one escape wheel is performed by a single-piece, flexible mechanism, comprised in the escapement mechanism and including at least one feeler-spindle cooperating with the at least one escape wheel or respectively the at least one balance;
• and
• wherein the single-piece, flexible mechanism is connected by at least one flexible blade comprised therein to a fixed structure of the timepiece or respectively to the at least one escape wheel;
• wherein the single-piece, flexible mechanism is a locking lever that includes at least one movable frame carrying locking beaks configured to cooperate with teeth comprised in the escape wheel, a plurality of the flexible blades which are flexible, prestressed buckled blades, and a fork carrying horns for cooperating with an impulse pin of the balance, and wherein the movable frame completely surrounds the escape wheel;
• wherein the flexible blades are extended by springs that are integral with weights which are either rigidly fixed to the fixed structure, or which have a small degree of freedom with respect to the structure limited by oblong portions cooperating with pins comprised in the rigid structure, in an orthogonal direction to a direction of translation, as an abscissa direction, of the movable frame.