Display mechanism with zero reset function

A display mechanism, for a timepiece movement, including a display wheel for displaying a first unit comprising a shaft intended to carry a display member for displaying said first unit and carrying, constrained to rotate with it, a first wheel and a cam comprising at least one snail-shaped portion, the display mechanism being adapted to be able to display an active first state in which said first wheel is intended to have a kinetic connection with a driving wheel of the timepiece movement to be driven in rotation as a function of said first unit to be displayed, and a zero reset second state in which the kinematic connection is neutralized to allow said first wheel to return to a predefined position, associated with a predefined position of the display member, the display mechanism further including a feeler-spindle adapted to cooperate with a perimeter of said cam, wherein

• said feeler-spindle is held pressed against the periphery of said cam in said first state, and
• said feeler-spindle and the perimeter of said cam are adapted and sized so that said feeler-spindle exerts on said cam, in said second state, a return force having a non-radial component adapted to return said first wheel to said predefined position.