Anti-shock system with angular locking

A shock absorber device for an arbor of a timepiece element comprising:

• a support including a base cup surmounted by a peripheral rim delimited, opposite said cup, by an upper surface and including an outer wall, said cup and the rim defining together a housing;
• at least one pivot module extending along an axis, said at least one pivot module being arranged inside said housing and able to cooperate with said arbor;
• fastening means including a peripheral shoulder extending from the rim towards the axial center of the cup;
• and
• elastic means being arranged between the pivot module and the shoulder to exert a stress on the pivot module,
• wherein the elastic means include a spring ring provided with at least one radial extension extending towards the center of said ring and with at least two catches extending in an opposite direction, said shoulder including at least one notch to allow a mounting of said spring ring based on a bayonet system, and
• wherein the shoulder includes, on either side of said at least one notch, a beak oriented towards the base cup allowing said elastic means to be locked in rotation.