A control device (10) for a horological movement, including a first part including a sliding guide tube (11) intended to be fixed relative to the horological movement, and a second movable part (12) slidably guided by the guide tube in an axial direction, relative to the first part, between an active position wherein it is able to be integral, by means of an adjustment rod (120), with a component of the horological movement, and an inactive position wherein the adjustment rod is intended to release the component of the horological movement. The second part includes a head (140) covering a reversible elastic casing module (130) fixed to the adjustment rod and arranged so as to occupy a rest state when the second part occupies the active and inactive positions and being urged by the guide tube when the second part moves between these positions.