Lock assembly for sliding door/window panels

Lock assembly for sliding door/window panels applicable to a series of frame profiles which in the region where the door/window panel shuts incorporate a vertically oriented protruding part (3) of the fixed frame profile (2) which is introduced into a frontal opening (7) of a vertically oriented sliding door/window panel profile (1) which comprises two parallel walls (1a,1b) and ends at a rear opening (8) into which a glass or shutter door/window panel is attached, comprising:

• a hooking mechanism for the engagement of a hook into a suitably shaped recession of a facing part, said hooking mechanism being automatically activated to take a position of engagement when the sliding door/window panel shuts as said vertically oriented protruding part (3) of the fixed frame profile (2) enters through said frontal opening (7) in between the parallel walls (1a,1b) of said vertically oriented sliding door/window panel profile (1) and being also automatically deactivated taking a position of disengagement of said hook from said recession in said facing part when the sliding door/window panel opens as said vertically oriented protruding part (3) bearing the suitably shaped recession of said facing part is withdrawn through said frontal opening (7) of said vertically oriented sliding door/window panel profile (1), wherein said hooking mechanism features at least one hook profile (21) comprising a flat surface (22) with recessions (22a,22b) on either side thereof for the mounting of a compression spring (20), a centre (27) for rotatable connection of said hook profile (21), a frontal terminal hooking arm (24) adapted for the engagement into said suitably shaped recession of the facing part, a rear terminal arm (26,26a) for immobilizing said frontal terminal hooking arm (24) in the locked position of engagement within said suitably shaped recession of the facing part and a sliding/rotating arm (25), said sliding/rotating arm acting so as upon touching the frontal surface of said facing part initiating a rotation of a certain length of arc of said hook profile (21) in the direction of engagement of said hooking arm (24) into said recession of the facing part when the sliding door/window panel shuts,
• at least one vertically extending flat surface protruding at right angles from the interior surface of at least one of said parallel walls (1a,1b) of said vertically oriented sliding door/window panel profile (1) at a length corresponding to the length of said at least one hook profile (21) and bearing a terminal shaping of a centre for the rotatable connection of said at least one hook profile (21),
• a facing part located onto said vertically oriented protruding part (3) of the fixed frame profile (2) including a frontal terminal surface (30,40) whereupon collides said sliding/rotating arm (25) to initiate rotation of said at least one hook profile (21), said facing part being adapted to receive said at least one hook profile (21) with at least one vertically extending recession (30a,40a) within which is engaged said frontal terminal hooking arm (24) of said at least one hook profile (21), and
• a locking mechanism for immobilizing said frontal terminal hooking arm (24) of said at least one hook profile (21) within said suitably shaped recession of the facing part, thereby maintaining said frontal terminal hooking arm (24) in the locked position when acting upon said rear terminal arm (26,26a) for immobilising said frontal terminal hooking arm (24) in the locked position.