ZERO-RESET DEVICE WITH INDEPENDENT HAMMERS

摘要

A zero-rest device for a timepiece, including first and second control mechanisms, two zero-reset cams, and two corresponding zero-reset hammers configured to cooperate with the cams. The device also includes two hammer springs exerting a pre-stress force causing a hammer to pivot in the direction of its corresponding cam, a winding and release mechanism and a locking mechanism. The winding and release mechanism is configured to wind the hammer springs during a first phase of an actuation of the first control mechanism and to cooperate, during a second phase of this actuation, with the locking means, such that the locking means passes from a rest position in which the locking means holds the hammers to a release position in which the locking means releases the hammers, which come, in each case under the action of the corresponding hammer spring, into the positions thereof of cooperation with the corresponding cam.

主权项

1. A zero-reset device for a timepiece, in particular for a chronograph watch, the device comprising:
a first control mechanism; a second control mechanism connected kinematically to said first control mechanism; at least two zero-reset cams; at least two corresponding zero-reset hammers being pivoted independently of one another and adapted to be actuated so as to cooperate with a corresponding zero-reset cam; at least two hammer springs, each of which is adapted to exert a pre-tension force causing a zero-reset hammer to pivot in the direction of a corresponding zero-reset cam; a winding and release mechanism; and a locking means mechanism; wherein said winding and release mechanism is configured to wind said hammer springs during a first phase of an actuation of the first control mechanism as well as to cooperate, during a second phase of the actuation of the first control mechanism, with said locking mechanism, such that said locking mechanism passes from a first, rest position, in which the locking mechanism holds the zero-reset hammers in the rest positions thereof, to a second, release position, in which the locking mechanism releases the zero-reset hammers, which come, in each case, under the action of the corresponding hammer spring, into the positions thereof of cooperation with the corresponding zero-reset cam.