Toe-piece of a ski binding for ski mountaineering

A toe-piece of a ski binding for ski mountaineering, comprising:

• a base which is fixable to a ski;
• a first jaw which rotatably couples with the base with respect to a first axis of rotation, and which is provided with a first guide which extends in a first oblique direction with respect to the first axis of rotation;
• a second jaw which rotatably couples with the base with respect to a second axis of rotation and which is provided with a second guide which extends in a second oblique direction with respect to the second axis of rotation;
• a first pin which is borne by the first jaw for inserting in a first lateral hole made in a tip of a ski boot;
• a second pin which is borne by the second jaw for inserting in a second lateral hole made in the tip of the ski boot;
• an activating lever which is rotatably coupled to the base;
• a joint which is activatable by the activating lever, which comprises a first sliding element which slidably couples with the first guide and which comprises a second sliding element which slidably couples with the second guide, so that the activation of the activating lever causes, by means of the joint, the rotation of the first jaw and the second jaw;
• elastic means which are arranged so as to push the joint to wedge against the first jaw and the second jaw;
• and
• a housing borne by the base ;
• wherein the elastic means are arranged in the housing.