ROTARY RESONATOR WITH A FLEXIBLE GUIDE SYSTEM BASED ON A DETACHED LEVER ESCAPEMENT

WIPO Patent Application WO/2018/095997

A3

Timepiece regulating member (300) comprising a detached escapement mechanism (200) with a lever (7), and a resonator (100) comprising at least one inertial element (2) to which a pin (6) is rigidly secured, the pin interacting with a fork (8) of the lever (7), the inertial element (2) being acted upon by elastic return means (3) fastened directly or indirectly to the plate (1) and being arranged to interact indirectly with an escapement wheel (4) that is part of the escapement mechanism (200); the resonator mechanism (100) is a rotary resonator with a virtual pivot, pivoting about a main axis (DP), and has a flexible guide system subjected to the elastic return of at least two flexible blades (5) fastened to the plate (1), the lever (7) pivoting about a secondary axis (DS). The width of the lever fork is greater than (P+S)/sin(α/2+β/2), where the penetration stroke (P) is between 40 and 200 micrometers and the safety distance (S) is between 10 and 60 micrometers; α is the lever lift angle that corresponds to the maximum angular stroke of the lever fork (8); β is the resonator lift angle, over which the pin (6) contacts the lever fork (8). The fork (8) is widened in relation to a conventional Swiss lever.

WINKLER PASCAL (CH)
HELFER JEAN-LUC (CH)
DI DOMENICO GIANNI (CH)

PCT/EP2017/080121

August 30, 2018

November 22, 2017

Click for automatic bibliography generation  

ETA SA MFT HORLOGERE SUISSE (CH)

G04B17/04; G04B15/08; G04B17/26; G04B17/28

EP2894520A2	2015-07-15
EP3032352A1	2016-06-15
EP2990885A1	2016-03-02
CH698105B1	2009-05-29

"Théorie de l'horlogerie", 1 October 1998, LAUSANNE, article CHARLES-ANDRÉ REYMONDIN: "Théorie de l'horlogerie", pages: 104, XP055465889

ICB SA (CH)

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