US 11,675,312 B2
Rotating resonator with flexure bearing maintained by a detached lever escapement
Pascal Winkler, St-Blaise (CH); Jean-Luc Helfer, Le Landeron (CH); and Gianni Di Domenico, Neuchatel (CH)
Assigned to ETA SA Manufacture Horlogere Suisse, Grenchen (CH)
Filed by ETA SA Manufacture Horlogere Suisse, Grenchen (CH)
Filed on May 21, 2019, as Appl. No. 16/418,697.
Application 16/418,697 is a continuation of application No. PCT/EP2017/069037, filed on Jul. 27, 2017.
Claims priority of application No. 16200152 (EP), filed on Nov. 23, 2016.
Prior Publication US 2019/0271945 A1, Sep. 5, 2019
Int. Cl. G04B 15/08 (2006.01); G04B 17/28 (2006.01); G04B 15/14 (2006.01); G04B 18/02 (2006.01); G04B 17/04 (2006.01); G04B 17/26 (2006.01)
CPC G04B 15/08 (2013.01) [G04B 15/14 (2013.01); G04B 17/28 (2013.01); G04B 18/02 (2013.01); G04B 17/045 (2013.01); G04B 17/26 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A timepiece regulating mechanism, comprising, arranged on a main plate;
a resonator mechanism with a quality factor, the quality factor being associated with losses of energy and disruptions of rate; and
an escapement mechanism which is subjected to a torque of driver comprised in a movement, said resonator mechanism comprising an inertia element arranged to oscillate with respect to said plate, said inertia element being subjected to an action of elastic return means directly or indirectly attached to said plate, and said inertia element being arranged to cooperate indirectly with an escape wheel set comprised in said escapement mechanism, wherein
said resonator mechanism is a resonator with a virtual pivot rotating about a main axis, with a flexure bearing including at least two flexible strips, and including an impulse pin integral with said inertia element,
said escapement mechanism includes a lever pivoting about a secondary axis and including a lever fork arranged to cooperate with said impulse pin, and is a detached escapement mechanism, wherein, during an operating cycle, said resonator mechanism has at least one phase of freedom in which said impulse pin is at a distance from said lever fork,
a lift angle of the resonator, during which said impulse pin is in contact with said lever fork, is less than 10°, and
said impulse pin is configured to be removed from said lever fork when said impulse pin travels through a half of the lift angle of the resonator, which has a non-zero degree.