Shock protection for a strip resonator with RCC pivots

A timepiece resonator mechanism comprising:

• a structure and at least one inertia element, which is arranged to oscillate in a pivoting motion about a pivot axis, with the centre of inertia of said at least one inertia element aligned on said pivot axis, said at least one inertia element being subjected to return forces exerted by first and second remote centre of compliance (RCC) flexure pivots, each of said flexure pivots comprising a plurality of elastic resonator strips, each of said elastic resonator strips directly or indirectly fixed at a first end to said structure and directly or indirectly fixed at a second end to said at least one inertia element, each said elastic resonator strip extending in a plane perpendicular to said pivot axis and being essentially deformable in said plane perpendicular to said pivot axis,
• wherein said elastic resonator strips are straight and extend in planes that are parallel to each other or coincident,
• wherein a crossing, in projection onto a plane perpendicular to said pivot axis, of directions in which said elastic resonator strips extend, defines said pivot axis, and
• wherein said resonator mechanism includes an anti-shock element which includes a stiff element, on which are fixed said second ends of said strips, and which includes a chamber delimited by an inner surface to which is fixed inside said chamber at least one anti-shock flexible strip arranged to keep suspended an inner ring carrying an arbor comprised in said inertia element such that said arbor extends through an opening in said structure, a first shoulder on a first end of the arbor includes a first shoulder in abutment with said first flexure pivot, and a second shoulder on a second end of the arbor includes a second shoulder in abutment with said second flexure pivot, so as to allow any radial motion with respect to said pivot axis or paraxial motion in a plane perpendicular to said pivot axis of said inner ring within the confines of said chamber, so as to prevent any rotation of said stiff element when said inertia element is subjected to acceleration from an impact, said anti-shock element providing shock protection for said strips of said flexure pivots.