Tuning fork oscillator for timepieces

摘要

A timepiece oscillator including a resonator formed by a tuning fork which includes at least two mobile oscillating parts, fixed to a connection element by flexible elements whose geometry determines a virtual pivot axis having a determined position with respect to this connection element and around which the respective mobile part oscillates, and the center of mass of the mobile part coincides in the rest position with the respective virtual pivot axis, and, for at least one of the two mobile parts the flexible elements are formed of intersecting resilient strips extending at a distance from each other in two parallel planes, and whose directions, in projection on one of the parallel planes, intersect at the virtual pivot axis of the mobile part.

主权项

1. An oscillator for a timepiece, comprising a time base with at least one resonator formed by a tuning fork, which includes at least two mobile oscillating parts, said mobile parts being secured to a connection element, comprised in said oscillator, by flexible elements whose geometry determines a virtual pivot axis having a determined position relative to said connection element, said respective mobile part oscillates about said virtual pivot axis, the centre of mass of the mobile part coincides in the rest position with said respective virtual pivot axis, wherein, for at least one said mobile part, said flexible elements are formed of intersecting resilient strips extending at a distance from each other in two parallel planes, and whose directions, in projection on one of said parallel planes, intersect at said virtual pivot axis of said mobile part.