Timepiece escapement mechanism, timepiece movement and timepiece

The utility model relates to a clock escapement mechanism (100) which comprises an escapement fork (10) and an escapement wheel (20), the escapement fork (10) is arranged to be matched with an inertia mass body (40) of a mechanical oscillator (400) and matched with teeth (2) of the escapement wheel (20) at the position of a fork tile (1) borne by or included by the escapement fork (10), and the escapement fork (10) is arranged to be matched with teeth (2) of the escapement wheel (20). The contact portion between the pallet shoe (1) and the teeth (2) of the escapement wheel (20) comprises at least three regions, i.e. A first region in which the torque is in the negative direction, where the angle between the normal of the contact portion and the radial line of the pallet is negative; a second region in which the torque corresponding to the first half-lead angle is in a positive direction, where the angle [omega] 2 is positive; and a third region in which the torque corresponding to the second half-lead angle i