Patent ID: 11934150
Assignee: THE SWATCH GROUP RESEARCH AND DEVELOPMENT LTD
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A horological movement comprising:
a mechanical resonator; and
an escapement which is associated with said mechanical resonator and which comprises an escapement wheel, having a plurality of projecting parts, and a stopper, said stopper comprising two mechanical pallets, respectively forming two mechanical abutments for the plurality of projecting parts, and a fork arranged to cooperate with the mechanical resonator via a periodic engagement of a pin, integral with said mechanical resonator, between two horns of the fork, the mechanical resonator being coupled to the stopper so that, during normal operation of the horological movement, the stopper undergoes a reciprocating movement between first and second rest positions wherein said stopper alternately remains during successive time atervals;
wherein the escapement is arranged so as to allow, during normal operation of the horological movement, absorption of kinetic energy of the escapement wheel by successive impacts, between the plurality of projecting parts and alternately the two mechanical pallets, respectively at an end of successive steps of a step-by-step rotation of the escapement wheel;
wherein the escapement is arranged so that, when the stopper is switched from the first rest position to the second rest position while the escapement wheel has any angular position in a plurality of ranges of angular positions corresponding respectively to the plurality of projecting part, one of the two mechanical pallets abuts against one of the projecting parts corresponding to the concerned range of angular positions before the stopper can reach an angular position of disengagement of the pin on a side of the second rest position, said one of the tyro mechanical pallets then exerting on said projecting part a radial force, relative to an axis of rotation of the escapement wheel, an intensity of which depends on said any angular position of the escapement wheel;
wherein the projecting parts of the escapement wheel are flexible and each is arranged so as to be able to bend, in a general plane perpendicular to an axis of rotation of the stopper, undergoing an elastic deformation under the action of said radial force, each projecting part having an elastic capacity allowing it the projecting part to elastically absorb, during said elastic deformation under the action of the radial force, most of a maximum mechanical energy that the mechanical resonator can have during normal operation of the horological movement; and
wherein the escapement comprises a magnetic system magnetically coupling the escapement wheel and the stopper, the magnetic system including a magnet supported at each of the two mechanical pallets, and a periodic magnetized structure arranged on a disk, the periodic magnetized structure being provided on the escapement wheel.