Security closure for control of access

A security closure locking assembly for controlling access, comprising an outer unit (1) and an inner unit (2) for installation on the respective outside and inside of a door (3) for mechanical actuation of the opening turning of a lock mechanism (4) and having a main bolt (4a) and a privacy bolt (4b);

• said outer unit (1) having an armored body assembly (5), a primary tube (6) carrying an outer actuating handle (7), a secondary tube (8) having an inner wall, an outer wall and an opening (27) and carrying a square axle (9) which produces the opening of said main bolt (4a), said primary tube (6) having a fitted periphery within said secondary tube (8), an elastically retractable tenon (10) for rotary coupling between said primary tube (6) and said secondary tube (8) and which acts radially and vertically from the inside of said primary tube (6) to the outside of said primary tube (6), a retractor treadle (11) which is guided in said body assembly (5) and aligned in permanent contact with said retractable tenon (10) through said opening (27) in said secondary tube (8), a rocker (12) having elastic arms for biasing said retractor treadle (11), said rocker (12) being adapted to be actuated in opposite directions by a motorized actuator (13) and by an emergency lever (14), an electronic reader (15) of cards having a magnetic or optical code (16) for activating said motorized actuator (13) upon validating said card (16), and an emergency lock cylinder (17) for an encoded security key adapted to push said emergency lever (14);
• said inner unit (2) having a housing (18) for batteries and an inner tube (20) having an inner actuating handle (19) mounted therein and which is directly coupled to said square axle (9), said inner tube (20) having first and second pushing tabs (21) symmetrically arranged in mutual opposition, said pushing tabs (21) acting independently of each other in response to the direct or opposite turning of said inner actuating handle (19) to actuate said privacy bolt (4b).