Wearable object, in particular watch bracelet, comprising a power supply device provided with an electromechanical converter

A wearable object comprising an electronic unit and a power supply unit formed by an electromechanical converter, wherein the electromechanical converter comprises:

• a rotor capable of being rotated by movements that the wearable object can undergo, this rotor carrying at least a first permanent magnet;
• a mechanical resonator mounted on a support and provided with an inertia mass capable of oscillating, around an axis of oscillation, at a resonant frequency (FRes) specific to this mechanical resonator;
• and
• an electromagnetic system formed by at least a second permanent magnet and at least one coil which are respectively carried by the inertia mass and by said support or an element integral with this support and which are arranged so that, when the mechanical resonator is at rest, at least part of the magnetic flux generated by the second permanent magnet passes through the coil so that, when the mechanical resonator is oscillating, an induced voltage (UInd) is generated in this coil;
• the electromechanical converter being arranged so that said at least one first permanent magnet and said at least one second permanent magnet can, during a rotational drive of the rotor, interact magnetically so as to apply to the inertia mass, momentarily or temporarily, a magnetic force torque allowing to excite the mechanical resonator, in order to generate at least one oscillation of this mechanical resonator substantially at its resonant frequency.