Optimised magneto-mechanical timepiece escapement mechanism

A timepiece oscillator, comprising:

• at least one resonator, with an inertial mass returned by elastic return means with respect to a fixed structure, said resonator oscillating about an axis of oscillation, said inertial mass carrying an entry pallet and an exit pallet;
• an escapement mechanism including an escape wheel arranged to rotate about an axis of rotation and including end teeth, each arranged to cooperate with said entry pallet or with said exit pallet to maintain the oscillation of said resonator,
• wherein said escapement mechanism is a magneto-mechanical escapement mechanism and said escape wheel includes at least one magnet at the end of each said tooth, said teeth being arranged to act alternately with said entry and exit pallets, and said entry pallet includes a first magnetic arrangement, said exit pallet includes a second magnetic arrangement, and said first magnetic arrangement and said second magnetic arrangement each include an annular sector, centered on said axis of oscillation of said resonator, and defining a first magnetic barrier area, which extends above and/or below said mechanical pallet-stone of said entry pallet or of said exit pallet, with reference to the direction of said axis of oscillation, over the entire length of said mechanical pallet-stone able to act as support for said teeth during the supplementary arc, in order to form a magnetic cylinder escapement mechanism.