Device for locking uni-cortical pins

A locking device for locking unicortical pins, comprising:

• a pin-locking arm provided with two seats suitable for locking a corresponding number of unicortical pins;
• and
• a connection base, intended to couple with a connecting body of an anchoring group for an external fixator, locking means configured to act simultaneously on the seats, locking in position two unicortical pins inserted therein, wherein said locking means comprise deformable spheres which are passed through by an insertion channel for the unicortical pins, and a pressure plate acting on the seats for compressing both said deformable spheres locking in position the unicortical pins inserted in the respective insertion channels;
• wherein said deformable spheres are arranged between an impression of the pin-locking arm and the pressure plate, said locking means further comprising tightening means designed to generate an action force for tightening the pressure plate against the pin-locking arm, said action force being directed axially with respect to said insertion channel of said deformable spheres, for locking in position said two unicortical pins inserted therein;
• wherein said locking means further comprise at least one resilient setting element arranged between the impression and the pressure plate and intended to oppose the action of the tightening means.