Device for actuating the front derailleur of a bicycle

An actuation device for actuating a front derailleur of a bicycle, comprising:

• a control pin, configured to be set in rotation by a control lever, that is rotatable about a rotation axis (X) in a first angular direction (A) between a first angular position and a last angular position and in a second angular direction (B) between the last angular position and the first angular position;
• a cable-winding bush angularly rotatable about said rotation axis (X) in said first angular direction (A) to wind a control cable between a first winding position and a last winding position and in said second angular direction (B) to unwind said control cable between the last winding position and the first winding position;
• an indexer configured to define a plurality of stop areas for the rotation of said control pin, each stop area corresponding to an angular position comprised between said first angular position and said last angular position of said control pin;
• and,
• elastic members active between said control pin and said cable-winding bush configured to make the control pin fixedly connected to the cable-winding bush during rotations of the latter between the first winding position and the last winding position and between the last winding position and the first winding position and to make said control pin rotatable with respect to said cable-winding bush between the last winding position of the cable-winding bush and the last angular position of the control pin.