Reverser mechanism for uni-directional rotational driving of a wheel set
AssigneeETA SA Manufacture Horlogere Suisse
InventorsJean-Luc Helfer, Thierry Conus
Life of this patent
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Abstract
The mechanism includes, mounted to rotate freely on an arbour 6, a driving wheel (5) driven by an oscillating drive pinion (3) and a driven wheel (7) meshed with the first wheel set (1) of a kinematic chain and comprising a dome (11) for housing a coupling device (10) comprising at least one bent locking arm (12) one end (14) of which has a pivoting point (14a, 14b) on the driving wheel (5) and the other end (16) of which has a point of abutment (16a) against the inner wall (2) of the dome (11) of the driven wheel (7) via the action of a spring (20) integral with said arm (12). The pivoting point (14b) preferably moves along a cam (21). Application to automatic winding by an oscillating weight.
Claims19
A single direction reverser mechanism for the uni-directional driving of an first wheel set of a kinematic chain including a drive pinion with an oscillating movement meshed with a driving wheel mounted on an arbour above a driven wheel mounted on the same arbour, meshed, directly or indirectly, with said first wheel set of the kinematic chain, and including a dome open towards the driving wheel to house a coupling device, made of a resilient material for coupling/uncoupling the two wheels as a function of the direction of rotation of the drive pinion, wherein said coupling device includes at least one locking arm one end of which has a pivoting point on the driving wheel and the other end of which has a point of abutment against an inner wall of the dome of the driven wheel via the action of a spring.
A timepiece including a reverser mechanism for the unidirectional driving of the first wheel set of a kinematic chain including a drive pinion with an oscillating movement meshed with a driving wheel mounted on an arbour above a driven wheel mounted on the same arbour, meshed, directly or indirectly, with said first wheel set of the kinematic chain, and including a dome open towards the driving wheel to house a coupling device, made of a resilient material for coupling/uncoupling the two wheels as a function of the direction of rotation of the drive pinion, wherein said coupling device includes at least one locking arm one end of which has a pivoting point on the driving wheel and the other end of which has a point of abutment against the inner wall of the dome of the driven wheel via the action of a spring.
Dependencies are inferred from the claim text.