Push-piece winding button control device for a portable object of small dimensions

A control device with a push-piece winding button for a portable object, said control device comprising:

• a frame;
• a control stem mounted to pivot about a longitudinal axis and axially movable with respect to the frame between at least two positions, including a transitory first position and a stable second position;
• at least one cam path which has a longitudinal cam profile and at least one cam follower arranged to cooperate with the longitudinal cam profile, wherein the cam path is arranged to move concurrently with the control stern when the latter is moved axially, and wherein the cam follower, mounted inside the frame, is arranged to be elastically returned against the cam path, wherein the cam path comprises a first recess defining the stable position of the control stem, and a profile portion forming a ramp which rises from the first recess towards the transitory position;
• and
• a position indexing plate in which is formed the cam path with which the cam follower cooperates, wherein said position indexing plate is arranged to be coupled in translation to the control stem when said control stem is moved in one direction or the other in a direction parallel to the longitudinal axis and to remain stationary when the control stem is pivoted in one direction or the other.