Zero-reset device with independent hammers

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.