Electromechanical timepiece movement comprising a device for detection of the angular position of a wheel

An electromechanical timepiece movement comprising a stepping motor, a wheel driven in rotation by said motor, a movable component meshing with said wheel and a device for detecting the angular position of the wheel, said detection device making it possible to determine the passage of a reference half-axis of said wheel through a reference angle defined by said wheel and the movable component and comprising for such purpose an electronic circuit capable of detecting an additional resistive torque that occurs momentarily when the wheel and movable component are driven in a stepping motion by the motor;

• wherein said additional resistive torque is generated by a resilient element integral with the wheel and arranged to extend, in projection into a general plane of said wheel in which said toothing thereof is located, at least inside one given hollow between two adjacent teeth of said toothing, said resilient element being elastically deformable in a radial direction of the wheel substantially as far as the bottom of said given hollow;
• and wherein said movable component has a toothing which is at least partially situated at the level of said resilient element, such that said toothing moves and presses against the resilient element when said toothing penetrates said given hollow.