HRP20110818T1 - Lock cylinder with double locking means - Google Patents

Abstract

The cylinder (10) has two opposite parts (16) with locking blades (28) having a guiding pin (30) mounted between a radial stop unit (18) and a passage path (24). A stator (14) has locking pistons (42) and a rotor has a flat key (26) with coded opposite sides. One of the sides cooperates with the pin when the key is introduced in the path to cause transversal driving of the blades to adjust the notches opposite to the unit (18) and to permit radial movement towards interior of the rotor. Other side drives the pin in translation, where the pin drives the piston outside the rotor.

Claims (7)

1. A lock cylinder with a flat key, wherein said cylinder comprises a rotor (12) which is mounted in a stator (14) in such a way that it can rotate, wherein said rotor (12) has a passageway for the key in the axial direction (24 ), wherein said passageway divides said rotor (12) into two parts (16, 20) lying diametrically opposite each other, said parts having radial blocking means (18, 50, 22, 21) intended to block the rotation of said rotor (12) within said stator (14), said rotor (12) being adapted to accept a flat key (26) having two faces which are coded and lying on opposite sides (78, 80 ́; 78 ́, 80), wherein said coded faces lying on opposite sides (78, 80 ́, 78 ́, 80) are intended to cause radial displacement of said radial blocking means (18, 50, 22, 21), when said insert the flat key (26) into the specified passageway (24), so that it is released and a rotor (12) for rotation, wherein the radial blocking means (18, 50) of one of said parts has a retaining element (18) which projects outwardly from said rotor (12) in said locked position and extends towards the inside of the rotor (12) in the unlocked position, indicated by which, on the one hand, one of said two parts (16) located on opposite sides further comprises blocking slats (28) which are mounted transversely between said retaining element (18) and said passageway (24), in order to blocked said retention element (18) in said locked position, wherein said blocking slats (28) have a notch for receiving said retention element (18) and on the opposite side a projecting guide part (30) which is located in said passageway (24) and, on the other hand, the other part on the opposite side of said two parts has engagement pins (22) which are mounted so that they can slide inside the bore (21), while the stator (14) has pistons for blocking (42) which are mounted so that they can slide within one bore; and wherein one of said coded faces (78, 78 ́), located on opposite sides, cooperates with said protruding guide portion (30), when said flat key (26) is inserted into said passageway (24). , in order to cause movement in the transverse direction of the said blocking lamellas (28) and in this way set the said notches (34) in relation to the said retention element (18) and enable its radial movement towards the inner part of the said rotor (12 ), while the other side of said coded faces lying on opposite sides guides or moves said engaging pins (22) which drive their locking pistons (42) out of the rotor (12); and that said axial keyway (24) is eccentric and has an axial central zone (60) extending longitudinally between said radial blocking means (18, 50, 22, 21) and the axial eccentric zone (62); wherein said central zone (60) and eccentric zone (62), in a straight or vertical cross-section, are determined by two symmetrical depressions extending into two parallel zones (60, 62) mostly parallel to said rotor (12). 2. A lock cylinder according to claim 1, characterized in that said pressed parts have two parallel pressed ribs (64, 66; 70, 72) defining a longitudinal pressed groove (68, 74) between said two pressed ribs. 3. A lock cylinder according to claim 1 or 2, characterized in that said retention element (18) comprises a pin mounted substantially parallel to said axial passageway (24), wherein said pin acts together with said lamellae ( 28). 4. A lock cylinder according to claim 3, characterized in that said one part of said parts (16), which parts lie on opposite sides, has an axial groove (50) having an opening facing the outside of said rotor ( 12), wherein said pin (18) is placed in said axial groove (50). 5. A lock cylinder according to claim 4, characterized in that one of said parts (16), which parts are located on opposite sides, has a spring means to create a return tensioning force for said pin (18), at whereby said return force tends to move said pin out of said axial slot (50). 6. A lock cylinder according to any one of claims 1 to 5, characterized in that said rotor (12) has transverse slots (48) made in said one of said parts (16) located on opposite sides and an opening in said axial passageway (24) for a key, said transverse slots being adapted to receive said blocking lamellae (28). 7. A flat key (26) for a lock cylinder according to any one of claims 1 to 6, characterized in that said flat key (26) has two axial half-parts which are symmetrical to each other with respect to the longitudinal axis (C ) of the key, which axis extends between the said half-parts, whereby the said flat key (26) has two faces or two sides (75, 124) that lie opposite each other, each face of which is divided into two coded half-faces (78, 80; 78 ́, 80 ́) which are divided according to the specified axial half-parts; and where the said encoded half-faces (78, 80; 78 ́, 80 ́) of the said two faces (75, 124) lying opposite each other, form two pairs (78, 80 ́; 80, 78 ́) of half- faces lying opposite each other, wherein one of the two half-faces of the same pair has in the key a braided or bent groove (82, 82 ́) which is adapted to work together with the protruding guide parts (30) and which extends along axial direction, while the other half-face has two longitudinal grooves in the key (106 ́, 108 ́; 106, 108) which are separated in the key by a longitudinally cut or notched rib (110 ́, 110), which rib is adapted to work together with the engaging pins (22) to actuate the locking pistons (42).