Timepiece comprising a mechanical movement which running is enhanced by a regulation device

A timepiece that includes a mechanical movement, the timepiece comprising:

• an indicator mechanism configured to indicate a current time;
• a mechanical resonator configured to oscillate along a general oscillation axis about a neutral position corresponding to a minimum potential energy state thereof;
• a maintenance device of the mechanical resonator, the maintenance device and the mechanical resonator forming a mechanical oscillator which is arranged to time a running of the indicator mechanism;
• and
• a regulation device for regulating a medium frequency of the mechanical oscillator, the regulation device comprising a mechanical braking device of the mechanical resonator, the regulation device being configured to receive, from an auxiliary oscillator, a set-point frequency for said mechanical oscillator;
• wherein the mechanical braking device is configured to apply to said mechanical resonator a dissipative mechanical braking torque during periodic braking pulses which are generated at a braking frequency that is a function of the set-point frequency, said periodic braking pulses each having a duration less than a set-point half-period with the set-point period corresponding to the reciprocal of the set-point frequency, and
• wherein a system formed of the mechanical resonator and the mechanical braking device enables the mechanical braking device to start said periodic braking pulses at any position of the mechanical resonator in a range of positions along said general oscillation axis, said range of positions extending at least on a first side of the two sides from the neutral position of the mechanical resonator over at least a first range of amplitudes that the mechanical resonator is liable to have on the first side for a usable operating range of the mechanical oscillator.