Lock for a door or door wing

A lock comprising a cylinder, fixed to a door or door wing, with which a pivot is associated coaxially and rotatably, a lever for closing said door or door wing to a jamb being keyed to the end of said pivot, wherein a separate body can be keyed detachably to a second head of said pivot and is provided with magnetic means for temporary locking of a rotation of said body with respect to said cylinder,

• wherein said cylinder has a T-shaped configuration in which a first stem has an external thread and a cylindrical first head has a first seat, axially to which a through hole is provided, said pivot being arrangeable rotatably and coaxially with said first seat and at said through hole, said pivot forming a second cylindrical stem, which acts rotatably in said through hole and which, when installed, protrudes with an end thereof beyond a lower surface of said first stem of said cylinder, said second stem being kept rotatably associated, without the possibility of disconnection, with said cylinder by means of an elastic key, which is omega-shaped and can be associated with an annular groove that is provided in said first stem and is adjacent to said end, said second head of said pivot having a flat head that acts rotatably within said first seat,
• wherein said second head has a circular shape with two recesses obtained along two parallel chords, the separate body being able to be keyed removably at said second head of said pivot and being provided with said magnetic means for the temporary locking of the rotation of said body with respect to said cylinder, and
• wherein said body is constituted by a disc that has, on a front surface that is directed away from said cylinder, a second seat, which has a square plan shape with rounded corners and within which it is possible to arrange selectively a complementarily shaped magnetic key that contains at least one magnet, grooves being provided in a perimetric edge of said disc and being adapted to constitute grip means for a user, a third cylindrical stem protruding from a side that is opposite to the front surface of said disc and having, in a surface of said third cylindrical stem directed toward said pivot, two or more circular third seats or cavities for complementary shaped cams that can be associated rotatably therewith, and one or more first magnets being associated axially with each one of said complementary shaped cams.