Multi-point locking device for windows or doors

A locking device for a window or door, adapted to be arranged on a movable frame of said window or door, said device comprising:

• a central body;
• a handle engaging rotatably according to an axis of rotation on said central body, where said handle is rotatable between a minimum angle α and a maximum angle β of rotation around the axis, where the rotation of angle α corresponds to an open position of said movable frame, while the rotation of angle β corresponds to the locked position of said movable frame, the handle also assuming an intermediate rotation position I of angle γ where α<γ<β, said intermediate position I corresponding to a closed position of said movable frame;
• a rod extending according to a main development direction perpendicular to said axis of rotation, said rod being slidingly connected to said central body;
• movement means of said rod housed in said central body in a rotatable arrangement with respect to the rotation axis, said linear movement means engaging with said handle and said rod;
• hooks supported by said rod and adapted to engage/disengage with respective seats of a fixed frame of the door or window due to the translation of said rod, in order to close/open the movable frame with respect to said fixed frame;
• said device being characterized in that:
• said rod comprises two rod-shaped elements, one of which is fixed with the central body and a second is mobile sliding on the fixed-one rod-shaped element and with respect to the central body, said mobile element of the rod installing said hooks;
• said movement means comprise a rotor rotatable with respect to the axis and connected to said handle , a single protuberance projecting by said rotor in a direction, perpendicular to the axis of rotation and to the development axis, said protuberance engages with a seat of said mobile element of the rod;
• said protuberance defining two sides symmetrical with respect to the axis and a head arranged between the two sides and straddling the axis, said seat defining two edges each facing towards one of the respective sides;
• in which said side abuts against said respective edge up to the point of intermediate position I of the handle , while for the further rotation segment from the intermediate position I to the angle position β said side abuts against said head;
• as a result of this abutment, the movable element of the rod is prevented by the translation according to said development axis.