Timepiece movement including an instantaneous actuator controlled by the movement

A timepiece movement including an instantaneous actuator controlled by the movement and arranged to actuate a mechanism of the movement by abruptly pushing an element of said mechanism away from an initial position, the actuator comprising a trailing wheel driven in rotation about the axis thereof by the movement, an eccentric which is free to rotate coaxially to the trailing wheel and arranged to abut against and therefore be driven by the trailing wheel, a hammer returned by a spring against the periphery of the eccentric and arranged to cooperate with the curve of the eccentric so as to rotate the eccentric with respect to the trailing wheel, a pivoting wheel set comprising a projecting portion which is free to rotate coaxially to both the trailing wheel and the eccentric, the pivoting wheel set being arranged to abut against and therefore to be driven in rotation by the eccentric and the projecting portion of the pivoting wheel set being arranged to push said element of the mechanism away in passing, wherein the projecting portion of the pivoting wheel set is arranged to move the element temporarily away from the initial position thereof against a return force, wherein the return force is arranged to then return the element of the mechanism to the initial position thereof, and wherein the pivoting wheel set is free to rotate coaxially to both the trailing wheel and the eccentric within a limited angle relative to the eccentric, so as to allow the projecting portion to move out of the way of the element of the mechanism via the pivoting of the pivoting wheel set relative to the eccentric when the element of the mechanism is returned to the initial position thereof by the return force.