Device for feeding yarn or yarns for knitting machines for hosiery or the like

A device for feeding a yarn or yarns for knitting machines for hosiery, comprising:

• a supporting structure;
• a first yarn finger which has an elongated shape and is pivoted, at an intermediate portion of the first yarn finger, to the supporting structure about a corresponding rotation axis and having, proximate to a longitudinal end of the first yarn finger, a passage for the yarn or yarns to be fed to needles of a knitting forming machine;
• an electromagnetically actuated device that acts on command on the first one yarn finger for rotation of the first yarn finger, with respect to the supporting structure, about the corresponding rotation axis, from an inactive position to at least one active position, which is angularly spaced with respect to the inactive position about the rotation axis, or vice versa, wherein the electromagnetically actuated device comprises at least one magnet that is fixed to the first yarn finger;
• a pair of electric coils, wherein a first electric coil of the pair of electric coils is positioned to directly face a portion of the first yarn finger in a first direction, second electric coil of the pair of electric coils is positioned to directly face the portion of the first yarn finger in a second direction, and the second direction is opposite to the first direction, the pair of electric coils being connected to the supporting structure, the pair of electric coils being able to be supplied electrically to generate a magnetic field that interacts with the at least one magnet to actuate the rotation of the first yarn finger about the corresponding rotation axis with respect to the supporting structure,
• a second yarn finger pivoted to the supporting structure about a same rotation axis as the first yarn finger;
• and
• magnetic field shielding elements interposed between one of the pair of electric coils that act on the first yarn finger and one of another pair of electric coils that act on the second yarn finger.