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Abstract

A hidden hinge system (1) for doors or windows comprising a fixed frame (100) defining an opening and a movable leaf (200) closing said opening, each of which is formed by profiles (101, 201) having at least one perimeter channel (102, 202), the hinge system comprising: a first body (2) that can be fixedly connected in a perimeter channel (102) of a profile (101) of the fixed frame (100); a second body (3) that can be fixedly connected in a perimeter channel (202) of a profile (201) of the movable leaf (200); and a lever assembly (4) articulating each other the first body (2) and the second body (3); the lever assembly (4) comprises, in turn, a first lever (5,) with a first end (5a) rotatably articulated to the first body (2) about a first rotation axis (A1) fixed with respect to the first body (2), a second end (5b) rotatably articulated to the second body (3) about a second rotation axis (A2) fixed with respect to the second body (3), and a middle portion (5c) interposed between its first end (5a) and its second end (5b), a second lever (6) having a first end (6a) articulated to the first body (2), a second end (6b) rotatably articulated to one end of the second body (3) about a third rotation axis (A3) and a middle portion (6c) interposed between its first end (6a) and its second end (6b), the first lever (5) and the second lever (6) being rotatably articulated each other in correspondence of their middle portion (5c, 6c) about a fourth rotation axis (A4); the second, third and fourth rotation axes are parallel with respect to the first rotation axis (A1); wherein the first end (6a) of the second lever (6) is articulated to the first body (2) by a kinematic pair (7, 8) realizing a rotation and translation relative motion of the first with respect to the second respectively about a fifth rotation axis (A5) parallel with respect to the first rotation axis (A1) and along a trajectory (T) that extends towards the first rotation axis A1 and that for at least a section is tangent or coincident with respect to at least a rectilinear direction (R) contained in a plane perpendicular with respect to the first rotation axis (A1), wherein said at least one rectilinear direction (R) is incident with respect to the plane defined by the opening (PA).

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First Claim