Abstract
A lock cylinder comprises a cylinder housing, a disk housing rotatably supported about a cylinder axis in the cylinder housing, a plurality of rotatably supported disk tumblers arranged along the cylinder axis in the disk housing, wherein each disk tumbler has a reception opening for a key, and a blocking element which is arranged in front of the disk tumblers, with respect to the key introduction direction, and is rotationally coupled to the disk housing. The blocking element is movable by a rotation of the key in an unlatching direction out of a blocking position in which the blocking element engages into a reception recess at the inner wall of the cylinder housing into a release position in which the blocking element is out of engagement with the reception recess.
Claims
1. A lock cylinder comprising a key or key blank (24); a cylinder housing (12); a disk housing (14) rotatably supported about a cylinder axis in the cylinder housing (12); a plurality of rotatably supported disk tumblers (16) arranged along the cylinder axis in the disk housing (14), wherein each disk tumbler (16) has a reception opening (18) for the key or key blank (24); and a blocking element (58) which is arranged in front of the disk tumblers (16), with respect to a key introduction direction (A), and which is rotationally coupled to the disk housing (14), wherein the blocking element is movable by a rotation of the key or key blank (24) in an unlatching direction (D) out of a blocking position in which the blocking element engages into a reception recess (66) of the cylinder housing (12) into a release position in which the blocking element is out of engagement with the reception recess (66), wherein the blocking element (58) has a driven flank (78) which cooperates with a drive flank (80) formed at a tip (60) of the key or key blank (24) such that the blocking element (58) is moved out of the blocking position into the release position by a rotation of the key or key blank (24) in the unlatching direction (D) out of the blocking position into the release position, wherein the driven flank (78) of the blocking element (58) and the drive flank (80) at the tip (60) of the key or key blank (24) are adapted such that the two flanks (78, 80) only contact one another when the key or key blank (24) is rotated into at least one first rotational position from an initial position which the key or key blank (24) adopts after an introduction into the lock cylinder (100), wherein the reception openings (18) of the disk tumblers (16) form a keyway (28) in a starting position of the lock cylinder (100), with the driven flank (78) of the blocking element (58) being arranged outside the keyway (28).
2. A lock cylinder in accordance with claim 1, wherein the driven flank (78) of the blocking element (58) and the drive flank (80) at the tip (60) of the key or key blank (24) are adapted such that the blocking element (58) moves out of the blocking position into the release position, while the key or key blank (24) is rotated from the first rotational position in the unlatching direction (D) into a second rotary position.
3. A lock cylinder in accordance with claim 1, wherein the tip (60) of the key or key blank (24) has a cross-sectional shape having two narrow sides (82a) and two broad sides (84a) which are longer than the narrow sides, with the blocking element (58) being adapted to be driven out of the blocking position into the release position by means of one of the broad sides (84a) of the key tip (60).
4. A lock cylinder in accordance with claim 1, wherein the blocking element (58) is adapted to be co-rotated on a rotation of the key or key blank (24) and remain in the blocking position when the key or key blank (24) is rotated in the unlatching direction (D) from an initial position, which the key adopts after an introduction into the lock cylinder (100), into a first rotational position.
5. A lock cylinder (100) in accordance with claim 1, wherein the key or key blank (24) includes a shaft (81) whose tip (60) cooperates with the blocking element (58) provided in the lock cylinder (100), wherein the shaft (81) has two broad sides (84) and two narrow sides (82); wherein the shaft tip (60) has two broad sides (84a), two narrow sides (82a) and one end face (85); and wherein a recessed portion (94) is provided set back relative to a plane (92) of the broad side (84) of the shaft (81) at at least one broad side (84a) of the shaft tip (60).
6. A lock cylinder in accordance with claim 5, wherein the recessed portion (94) is formed along a key axis over the total broad side (84a) of the shaft tip (60).
7. A lock cylinder in accordance with claim 5, wherein the recessed portion (94) only extends over a part of the broad side (84a) of the shaft tip (60) in a lateral direction transverse to a key axis, while another part of the broad side (84a) of the shaft tip (60) lies in the plane (92) of the broad side (84) of the shaft (60).
8. A lock cylinder in accordance with claim 5, wherein the recessed portion (94) extends in parallel with the plane (92) of the broad side (84) of the shaft (81); or obliquely to the plane (92) of the broad side (84) of the shaft (81); or sectionally in parallel with and sectionally obliquely to the plane (92) of the broad side (84) of the shaft (81).
9. A lock cylinder in accordance with claim 5, wherein a respective recessed portion (94) is provided at each of the two broad sides (84a) of the shaft tip (60), with the two recessed portions (94) being formed symmetrical to one another.
10. A lock cylinder in accordance with claim 5, wherein the two narrow sides (82a) of the shaft tip (60) extend in a tapering and oblique manner in the direction of the end face (85).
11. A lock cylinder in accordance with claim 5, wherein the shaft tip (60) is set off from the remaining part of the shaft (81) by a peripheral notch (96) at the narrow sides (82) of the shaft (81).
12. A lock cylinder in accordance with claim 11, wherein a further peripheral notch (98) is formed at the narrow sides (82) of the shaft (81) in a front part of the shaft (81) disposed in the vicinity of the shaft tip (60).
13. A lock cylinder comprising: a key or key blank (24); a cylinder housing (12); a disk housing (14) rotatably supported about a cylinder axis in the cylinder housing (12); a plurality of rotatably supported disk tumblers (16) arranged along the cylinder axis in the disk housing (14), wherein each disk tumbler (16) has a reception opening (18) for the key or key blank (24); and a blocking element (58) which is arranged in front of the disk tumblers (16), with respect to a key introduction direction (A), and which is rotationally coupled to the disk housing (14), wherein the blocking element is movable by a rotation of the key or key blank (24) in an unlatching direction (D) out of a blocking position in which the blocking element engages into a reception recess (66) of the cylinder housing (12) into a release position in which the blocking element is out of engagement with the reception recess (66), wherein the reception recess (66) of the cylinder housing (12) has a first abutment surface (86) for an end of the blocking element (58) projecting into the reception recess (66), at which first abutment surface (86) the end of the blocking element (58) comes into contact when the key or key blank (24) is rotated in the unlatching direction (D) from an initial position which the key or key blank (24) adopts after an introduction into the lock cylinder (100) into a first rotational position, with the first abutment surface (86) blocking further rotation of the blocking element (58) in the unlatching direction (D), wherein the reception recess (66) has a second abutment surface (88) for the end of the blocking element (58) projecting into the reception recess, with the end of the blocking element (58) contacting the second abutment surface (88) and the second abutment surface (88) blocking a rotation of the blocking element (58) against the unlatching direction (D) when the key or key blank (24) is removed from the lock cylinder (100).
14. The lock cylinder of claim 13, wherein a further blocking element (56) is arranged in front of the disk tumblers (16), with respect to the key introduction direction (A), and is rotationally coupled to the disk housing (14), with the further blocking element (56) adopting, when the key or key blank (24) is removed from the lock cylinder (110), a blocking position in which the further blocking element (56) engages into a further reception recess (68) of the cylinder housing (12), and with the further blocking element (56) being movable out of engagement with the further reception recess (68) and thus into a release position by introducing the key or key blank (24) into the lock cylinder (100).
15. A lock cylinder comprising: a key or key blank (24); a cylinder housing (12); a disk housing (14) rotatably supported about a cylinder axis in the cylinder housing (12); a plurality of rotatably supported disk tumblers (16) arranged along the cylinder axis in the disk housing (14), wherein each disk tumbler (16) has a reception opening (18) for the key or key blank (24); and a blocking element (58) which is arranged in front of the disk tumblers (16), with respect to a key introduction direction (A), and which is rotationally coupled to the disk housing (14), wherein the blocking element is movable by a rotation of the key or key blank (24) in an unlatching direction (D) out of a blocking position in which the blocking element engages into a reception recess (66) of the cylinder housing (12) into a release position in which the blocking element is out of engagement with the reception recess (66), wherein a further blocking element (56) is arranged in front of the disk tumblers (16), with respect to the key introduction direction (A), and is rotationally coupled to the disk housing (14), with the further blocking element (56) adopting, when the key or key blank (24) is removed from the lock cylinder (110), a blocking position in which the further blocking element (56) engages into a further reception recess (68) of the cylinder housing (12), and with the further blocking element (56) being movable out of engagement with the further reception recess (68) and thus into a release position by introducing the key or key blank (24) into the lock cylinder (100).
16. The lock cylinder of claim 15, wherein the blocking element (58) has a driven flank (78) which cooperates with a drive flank (80) formed at the tip (60) of the key or key blank (24) such that the blocking element (58) is moved out of the blocking position into the release position by a rotation of the key or key blank (24) in the unlatching direction (D) out of the blocking position into the release position.
17. The lock cylinder of claim 16, wherein the driven flank (78) of the blocking element (58) and the drive flank (80) at the tip (60) of the key or key blank (24) are adapted such that the two flanks (78, 80) only contact one another when the key or key blank (24) is rotated into at least one first rotational position from an initial position which the key or key blank (24) adopts after an introduction into the lock cylinder (100), wherein the reception openings (18) of the disk tumblers (16) form a keyway (28) in a starting position of the lock cylinder (100), with the driven flank (78) of the blocking element (58) being arranged outside the keyway (28).
Description
(1) The invention will be described in the following with reference to an embodiment and to the drawings. There are shown:
(2) FIG. 1 an exploded representation of a lock cylinder in accordance with the invention with an associated key;
(3) FIGS. 2a and 2b a perspective view of the key of FIG. 1 or a front view of the key tip;
(4) FIG. 3 a partly sectional side view of the lock cylinder of FIG. 1 with an introduced key;
(5) FIGS. 4 to 6 a cross-sectional view through the lock cylinder of FIG. 1 in a starting position with a withdrawn key, at the level of a rotary slide block, or at the level of a front lift disk, or at the level of a rear lift disk;
(6) FIGS. 7 to 9 a cross-sectional view through the lock cylinder of FIG. 1 in an initial position with a key which is introduced and not yet rotated, at the level of the rotary slide block, or at the level of the front lift disk, or at the level of the rear lift disk;
(7) FIGS. 10 to 12 a cross-sectional view through the lock cylinder of FIG. 1 with a key which is rotated into a zero position, at the level of the rotary slide block, or at the level of the front lift disk, or at the level of the rear lift disk;
(8) FIGS. 13 to 15 a cross-sectional view through the lock cylinder of FIG. 1 with a key which is rotated into an end sorting position, at the level of the rotary slide block, or at the level of the front lift disk, or at the level of the rear lift disk;
(9) FIGS. 16 to 18 a cross-sectional view through the lock cylinder of FIG. 1 with a key which is rotated into an unblocking position, at the level of the rotary slide block, or at the level of the front lift disk, or at the level of the rear lift disk;
(10) FIGS. 19 to 21 a cross-sectional view through the lock cylinder of FIG. 1 with a key which is rotated into an unblocked position, at the level of the rotary slide block, or at the level of the front lift disk, or at the level of the rear lift disk;
(11) FIGS. 22 to 24 a cross-sectional view through the lock cylinder of FIG. 1 with a key which is rotated into an unlatched position, at the level of the rotary slide block, or at the level of the front lift disk, or at the level of the rear lift disk;
(12) FIG. 25 a longitudinal section through a lock cylinder known from the prior art; and
(13) FIG. 26 an exploded view of the lock cylinder of FIG. 25.
(14) The lock cylinder 100 in accordance with the invention of FIG. 1 comprises a cylinder housing 12, a disk housing 14 rotatably supported about a cylinder axis in the cylinder housing 12, and a plurality of radially supported disk tumblers 16 which are arranged along the cylinder axis in the disk housing 14 and between which a respective intermediate disk 36 is arranged, in particular supported in a floating manner. A security against rotation of the intermediate disks 36 can be provided by means of an abutment device (not shown).
(15) Each disk tumbler 16 and each intermediate disk 36 has a central reception opening 18 which together form a keyway 28 for the introduction of a key 24. The central reception openings 18 of the disk tumblers 16 in the embodiment shown have a rectangular cross-section, whereas the reception openings 18 of the intermediate disks 36 have a circular cross-section.
(16) Each disk tumbler 16 has a blocking cut-out 20 at its outer periphery for the reception of a blocking pin 22 which is aligned in parallel with the cylinder axis and is radially movably received in a slit (not shown in FIG. 1) provided in the wall of the disk housing 14. Each disk tumbler 16 additionally has at least one fixing cut-out 44 offset from the blocking cut-out 20 at its outer periphery for the reception of a core pin 46 aligned in parallel with the cylinder axis. The core pin 46 is in this respect likewise radially movably received in a slit, which is not shown in FIG. 1, provided in the wall of the disk housing 14.
(17) A lift disk 48 is provided in the disk housing 14 which is at the frontviewed in the introduction direction A of the key 24 into the keyway 28which is rotatably supported in parallel with the disk tumblers 16 in the disk housing 14 and which likewise has a central reception opening 18 for the key 24. The front lift disk 48 is thus at the distal end of the disk housing 14, viewed from the opening of the keyway 28. The front lift disk 48 is compulsorily coupled with respect to a rotation with the key 24 introduced into the keyway 28. The front lift disk 48 thus always co-rotates when the key 24 is rotated.
(18) The same applies to a rear lift disk 50 which is rotatably supported in the disk housing 14 behind the packet of disk tumblers 16 with respect to the introduction direction A (i.e. at the proximal end of the disk housing 14). In this respect, an intermediate disk 36, in particular supported in a floating manner, is arranged between the adjacent disk tumbler 16 and the rear lift disk 50, as FIG. 1 shows.
(19) The disk housing 14 is additionally closed by a cover 52 by which the disks 16, 36, 48, 50 are protected from falling out of the disk housing 14. Like the lift disks 48 and 50, the disk tumblers 16 and the intermediate disks 36, the cover 52 likewise has a central reception opening 18 for forming the keyway 28.
(20) Unlike the lock cylinder 10 which is described with reference to FIGS. 25 and 26 and in which the blocking pin 22 cooperates with the front lift disk not shown in FIGS. 25 and 26, a separate control element 54 formed by a control pin is provided in the lock cylinder 100 of FIG. 1. The control element 54 is provided at the level of the front lift disk 48 and thus adjacent to the blocking pin 22 in the introduction direction A of the key 24 and is arranged radially movably in a separate slit of the disk housing 14 or in the same slit in which the blocking pin 22 is arranged. The control element 54 can also be configured as a ball, for example. At the outer periphery, the front lift disk 48 has a control cut-out 70 (FIGS. 5, 8, 11) and a peripheral recess 108 (FIGS. 14, 17, 20, 23) serving as a further control cut-out for the reception of the control element 54.
(21) Viewed in the introduction direction A of the key 24, a first blocking element formed by a so-called slide block 56 and a second blocking element formed by a so-called rotary slide block 58 are arranged within the same plane in front of the disk housing 14 (i.e. offset to distal) and are linearly movably supported (i.e. along a straight line) in a normal plane to the cylinder axis in parallel with a radial direction with respect to the cylinder axis.
(22) As FIG. 1 shows, the disk housing 14 likewise has at its end at the front, viewed in the introduction direction A of the key 24, a reception opening 18 through which a tip 60 of the key 24 (cf. FIGS. 1 and 2) projects with a key introduced into the keyway 28. As will be explained in the following, the slide block 56 and the rotary slide block 58 can be actuated via the key tip 60.
(23) An attachment 62 is attached to the end of the disk housing 14 at the front, viewed in the key introduction direction A. The attachment 62 serves as a reception and as a translatory guide for the slide block 56 and the rotary slide block 58 and as a connection member to a lock mechanism, not shown in FIG. 1, so that the latter can be actuated by a rotation of the disk housing (cf. the coupling section 30 in FIG. 25).
(24) Clamps 64 are provided for holding the attachment 62 at the disk housing 14 and the attachment 62 can be clamped tight at the disk housing 14 by them, in particular at mutually opposite sides.
(25) The key 24 shown in FIG. 2a has a plurality of differently angled incisions 26 which correspond in a manner known per se to different angular positions of the block cut-outs 20 and of the fixing cut-outs 44 of the disk tumblers 16. The disk tumblers 16 have a specific rotational clearance with respect to the respective associated incision 26 of the key 24 and the angular dimension of the respective incision 26 depends on the dimension of said rotational clearance. In dependence on the angular dimension of the incisions 26, control sections (flanks) of the respective incisions 26 and corresponding control sections (inner walls) of the central reception openings 18 of the associated respective disk tumblers 16 thus come into engagement at different times and in accordance with the encoding provided in the respective incision 26, as has already been described with respect to FIGS. 25 and 26.
(26) The front lift disk 48 and the rear lift disk 50 have the encoding 6 so that the two lift disks 48 and 50 are compulsorily coupled with the key 24 with respect to a rotation.
(27) FIG. 3 shows a longitudinal section through the disk housing 14 and in this respect in particular through the two lift disks 48, 50 with the interposed disk tumblers 16, the blocking pin 22, the core pin 46, the control element 54 and the slide block 56 cooperating with the key tip 60 and the rotary slide block 58 likewise cooperating with the key tip 60.
(28) The operation of the lock cylinder 100 of FIG. 1 will be explained with respect to FIGS. 4 to 24 in the following. FIGS. 4 to 6 in this respect represent the situation with a removed key, which will also be called the starting position in the following, in different observation planes (in each case with a direction of view against the key introduction direction A). FIG. 4 shows a cross-section through the lock cylinder at the level of the rotary slide block 58 and of the slide block 56. In the starting position, the rotary slide block 58 adopts a blocking position since the rotary slide block 58 engages into a rotary slide block reception recess 66 provided at the inner wall of the cylinder housing 12. In addition, the slide block 56 adopts a blocking position since the slide block 56 engages into a slide block reception recess 68 provided at the inner wall of the cylinder housing 12. The rotary slide block 58 and the slide block 56 are in this respect each preloaded by means of a spring, not shown, in the direction of their respective blocking positions. The slide block 56 and the rotary slide block 58, however, satisfy different functions since they are effective as blocking elements at different times.
(29) FIG. 7 shows the same cross-section plane as FIG. 4, but with a key 24 which has been introduced, but not yet rotated, that is in the so-called initial position. As FIG. 7 shows, the slide block 56 is actuated by the key tip 60 by introducing the key 24 into the keyway 28 (cf. FIG. 1) such that the slide block 56 is urged out of the slide block reception recess 68 in a direction transverse to the cylinder axis and is in so doing moved from the blocking position into a release position. A blocking of the disk housing 14 effected by the slide block 56 in the starting position in accordance with FIG. 4 and active with respect to the unlatching direction D is therefore canceled by introducing the key 24 into the keyway 28, with the slide block 56 being rotationally coupled via the attachment 62 with said disk housing.
(30) As FIG. 7 likewise shows, the rotary slide block 58 is not yet actuated by the key tip 60 solely by introducing the key 24 into the keyway 28 (cf. FIG. 1). In the initial position with an introduced key 24, the rotary slide block 58 is therefore still in the blocking position and therefore engages into the rotary slide block reception recess 66 of the cylinder housing 12.
(31) FIG. 5 shows in the starting position a cross-section through the lock cylinder 100 of FIG. 1 at the level of the front lift disk 48. As FIG. 5 shows, the control element 54 is arranged in a slit provided in the disk housing 14 and engages in the starting position into the control cut-out 70 of the front lift disk 48. The control element 54 thereby fixes the disk housing 14 and the front lift disk 48 toward one another.
(32) As FIG. 5 also shows, the core pin 46 is likewise arranged in a slit of the disk housing 14 and engages into a fixing cut-out 72 which is formed at the outer periphery of the front lift disk 48. The core pin 46 thus likewise fixes the front lift disk 48 with respect to the disk housing 14. As FIG. 5 shows, a plurality of fixing cut-outs 72 are provided at the outer periphery of the front lift disk 48 which lie next to one another, viewed in the peripheral direction of the front lift disk 48, and which can also serve as chatter marks on the rotation of the front lift disk 48 relative to the core pin 46.
(33) FIG. 8 shows the same cross-sectional plane as FIG. 5, but in the initial position with a key 24 which has been inserted and not yet rotated. As a comparison of FIGS. 5 and 8 shows, no change in the shown cross-sectional plane is yet effected by the introduction of the key 24 into the lock cylinder.
(34) FIG. 6 shows a cross-section through the lock cylinder of FIG. 1 at the level of the rear lift disk 50 in the starting position. The core pin 46 likewise engages into a fixing cut-out 72 of the rear lift disk 50 in the starting position, whereinas with the front lift disk 48a plurality of fixing cut-outs 72 are likewise formed at the outer periphery of the rear lift disk 50 and are disposed next to one another in the peripheral direction. In a corresponding manner as is shown in FIGS. 5 and 6 for the front lift disk 48 and the rear lift disk 50, the core pin 46 also engages into corresponding fixing cut-outs 44 (cf. FIG. 1) which are each (cf. the fixing cut-outs 44 in FIG. 26) provided in the disk tumblers 16 (and preferably also in the intermediate disks 36) such that the core pin 46 also fixes the disk tumblers 16 against a rotation relative to the disk housing 14 in the starting position. The disk tumblers 16 can thus not be rotated individually with respect to the disk housing 14 in the starting position, whereby an effective protection against picking can already be achieved. In addition, an unintentional rotation of the disk tumblers 16 and of the lift disks 48, 50 can be prevented, whereby it can be ensured that the key 24 can be introduced into the keyway 28.
(35) As FIG. 6 also shows, the blocking pin 22 (arranged in axial alignment with the control element 54 in accordance with FIG. 5) is arranged in a slit of the disk housing 14 and engages in the starting position into a blocking pin reception recess 74 formed at the inner wall of the cylinder housing 12. The blocking pin 22 contacts the outer side of the rear lift disk 50 so that the blocking pin 22, in contrast to the core pin 46, does not fix the lift disk 50 at the disk housing 14.
(36) FIG. 9 shows the same cross-sectional plane as FIG. 6, but in the initial position with a key which has now been inserted, but not yet rotated. As can be seen by the comparison between FIG. 6 and FIG. 9, no change in the shown cross-sectional plane is effected by the introduction of the key.
(37) FIG. 10 shows the same cross-sectional plane as FIGS. 4 and 7 while the key 24 is rotated into a so-called zero position and FIG. 13 again shows the same cross-sectional plane while the key 24 is rotated into a so-called end sorting position. In a corresponding manner, FIG. 11 shows the same cross-sectional plane as FIGS. 5 and 8 in the zero position and FIG. 14 again shows the same cross-sectional plane as FIGS. 5, 8 and 11 in the end sorting position. FIG. 12 shows the same cross-sectional plane as FIGS. 6 and 9 in the zero position and FIG. 15 again shows the same cross-sectional plane as FIGS. 6, 9 and 12 in the end sorting position.
(38) In the zero position, the key 24 is rotated so far along an unlatching direction D with respect to the initial position that the disk housing 14 is first blocked against a further rotational movement and now, however, the disk tumblers 16 are released for a rotational movement relative to the disk housing 14 (so-called sorting). In the end sorting position, the sorting procedure of the disk tumblers 16 is completed so that the blocking cut-outs 20 of all the disk tumblers 16 are oriented in alignment with one another. In addition, in the end sorting position, the fixing cut-outs 44 of all the disk tumblers 16 are oriented in alignment with one another, viewed in the direction of the cylinder axis.
(39) As FIGS. 10 and 13 furthermore show, the blocking element formed by the rotary slide block 58 first effects the blocking of the disk housing 14 in the zero position in order to fix the disk housing 14 relative to the cylinder housing 12 during the sorting of the disk tumblers 16. The rotary slide block 58 is only moved out of the blocking position into the release position on the reaching of the end sorting position, wherein the rotary slide block 58 is transposed radially inwardly in a translatory manner. In the end sorting position in accordance with FIG. 13, the rotary slide block 58 is thus out of engagement with the rotary slide block reception recess 66 of the cylinder housing 12. This transposition of the rotary slide block 58 into the release position which is delayed in time with respect to the transposition of the slide block 56 is effected by a rotational movement of the key 24.
(40) The rotary slide block 58 has a driven flank 78 which does not yet come into contact with the tip 60 of the key 24 on the introduction of the key 24, that is in the initial position. A drive flank 80 (cf. FIGS. 2a and 2b) is formed at the key tip 60. The driven flank 78 of the rotary slide block 58 and the drive flank 80 at the tip 60 of the key 24 are adapted and cooperate such that the two flanks 78, 80 only come into contact with one another when the key 24 has been rotated in the unlatching direction D from the initial position (cf. FIG. 7) first into the zero position (cf. FIG. 10) and then up to just before the end sorting position. As soon as the two flanks 78, 80 have come into contact with one another, a slight further rotational movement of the key 24 which is transferred via the drive flank 80 onto the driven flank 78 and thus onto the rotary slide block 58 is sufficient so that the rotary slide block 58 guided in the attachment 62 is moved out of the rotary slide block reception recess 66 radially inwardly in a translatory manner into the release position. The lock cylinder 100 is now located in the end sorting position (cf. FIG. 13).
(41) In this respect, the rotary slide block reception recess 66 at the inner wall of the cylinder housing 12 is larger, viewed in the peripheral direction or in the direction of rotation D, than the extent of the end of the rotary slide block 58 projecting into the rotary slide reception recess 66 in the peripheral direction. The rotary slide block 58 thus has a rotational clearance relative to the cylinder housing 12 in its blocking position. The rotational clearance is present starting from the starting position and the initial position in accordance with FIG. 4 or FIG. 7 in the unlatching direction D. After the introduction of the key 24, the rotational clearance thus first has to be overcome in that the key 24 and thus the disk housing 14 are rotated together with the rotary slide block 58 into the zero position in accordance with FIG. 10. Only then does a further rotation of the key 24 starting from the zero position into the end sorting position effect the movement of the rotary slide block 58 out of the blocking position into the release position. The rotary slide block 58 can therefore be co-rotated into the zero position on the rotation of the key in the unlatching direction D from the initial position which the key 24 adopts after the introduction into the lock cylinder 100 (cf. FIG. 1) such that the rotary slide block 58 first remains in the radially outer blocking position.
(42) The rotary slide blocking reception recess 66, which is formed at the inner wall of the cylinder housing 12, has a first abutment surface 86 for the end of the rotary slide block 58 projecting into the rotary slide block reception recess 66. The end of the rotary slide block 58 comes into contact with the first abutment surface 86 when the key 24 is rotated in the unlatching direction D from the initial position in accordance with FIG. 7 into the zero position, as FIG. 10 shows. A further rotation of the disk housing 14 in the unlatching direction D can be blocked by the first abutment surface 86, in particular when an attempt is made to actuate the lock cylinder 100 with a non-matching wrong key via whose key tip the rotary slide block 58 cannot be actuated on the rotation of the key from the zero position into the end sorting position and in so doing can be brought out of engagement with the rotary slide block reception recess 66.
(43) The rotary slide block reception recess 66 of the cylinder housing 12 additionally has a second abutment surface 88 which is disposed opposite the first abutment surface 86 and which the end of the rotary slide block 58 projecting into the rotary slide block reception recess 66 contacts with a removed key (cf. FIGS. 4 and 7). A rotation of the rotary slide block 58 and thus of the disk housing 14 against the unlatching direction D beyond the starting position is blocked by the second abutment surface 88. The starting position is thus in particular defined against the unlatching direction D by the abutment of the rotary slide block 58 at the second abutment surface 88 of the cylinder housing 12 and in the unlatching direction D by the abutment of the slide block 56 at a third abutment surface 90 of the cylinder housing 12 which bounds the slide block reception recess 68 in the unlatching direction D.
(44) The particular configuration of the key tip 60 will be explained in even more detail in the following in connection with the actuation of the rotary slide block 58.
(45) As mentioned, the key 24 has the tip 60 at its shaft 81 for actuating the rotary slide block 58, said tip cooperating with the rotary slide block 58 on the rotation of the key 24. As FIG. 2a shows, the shaft 81 in this respect has two broad sides 84 and two narrow sides 82 and the key tip or shaft tip 60 accordingly has two broad sides 84a, two narrow sides 82a and one end face 85.
(46) Each broad side 84 of the shaft 81 has a plane 92 in which the outer surface of the respective broad side 84 lies. The plane 92 thus overlaps the outer elements or surfaces of the broad side 84 of the shaft 81. Recesses such as one or more elongate grooves in the broad side 84 are set back with respect to the plane 92 and thus toward the key axis. Only the plane 92 of the broad side 84 at the top in the illustration is shown in FIG. 2a.
(47) A flattened portion 94 is provided at each broad side 84a of the shaft tip 60 relative to the respective plane 92 of the corresponding shaft broad side 84. The flattened portion 94 of the upper broad side 84a is in this respect formed with respect to the longitudinal key axis rotationally symmetrically by 180 degrees to the corresponding flattened portion at the lower broad side 84a of the key of FIG. 2a so that the key 24 can be used as a reversible key. The respective flattened portion 94 extends in the transverse direction, i.e. viewed transverse to the key axis, only over a part of the corresponding broad side 84a of the shaft tip 60 while another part of the corresponding broad side 84a of the shaft tip 60 forms said drive flank 80 for actuating the rotary slide block 58 and preferably lies in the plane 92 of the corresponding shaft broad side 84. The drive flank 80 comes into contact with the driven flank 78 of the rotary drive block 58 on the rotation of the key 24 from the zero position into the end sorting position, as explained above, to transpose the rotary slide block 58 into the release position (cf. FIG. 13). However, this requires that the driven flank 78 of the rotary slide block 58 reaches (in its blocking position) close enough to the axis of rotation of the introduced key 24 (which corresponds to the cylinder axis and to the longitudinal key axis). The respective flattened portion 94 at the shaft tip 60 in this respect makes it possible that the key 24 can nevertheless be introduced into the keyway 28 in the starting position of the lock cylinder 100 (FIG. 1) without the shaft tip 60 abutting the rotary slide block 58 reaching relatively closely to the cylinder axis and in particular abutting its driven flank 78. This can be seen in FIGS. 7 and 10 in which the flattened portion 94 of the shaft tip 60 is arranged directly adjacent to and in parallel with the section of the rotary slide block 58 having the driven flank 78. The explained delayed rotary actuation (relative to the actuation of the slide block 56) of the rotary slide block 58 is thus made possible with a sufficient stability of the shaft tip 60 within the boundaries (maximum cross-sectional extent of the shaft tip 60, i.e. maximum extent of the narrow sides 82a and of the broad sides 84a) predefined by the keyway 28. This rotary actuation takes place in that the drive flank 80 of the shaft tip 60 arranged eccentrically with respect to the cylinder axis carries out a tangential movement (i.e. is pivoted with a spacing about the cylinder axis).
(48) The broad side 84a of the shaft tip 60 is set back with respect to the plane 92 of the broad side 84 of the shaft 81 in the region of the respective flattened portion 94. In the exemplary key 24 shown in FIGS. 2a and 2b, the flattened portion 94 extends in the longitudinal direction, i.e. viewed in the direction of the key axis, over the total broad side 84a of the shaft tip 60. The flattened portion 94 extends in the transverse direction, in contrast, over a part of the broad side 84a which takes up approximately 70% of the breadth of the broad side 84a of the shaft tip 60 while the drive flank 80 only extends over approximately 30% of the breadth of the broad side 84a in the transverse direction. The respective flattened portion 94 isas shown in FIGS. 2a and 2b-obliquely inclined sectionally with respect to the plane 92 of the corresponding shaft broad side 84, wherein the oblique position angle is open between the respective flattened portion 94 and the plane 92 in a direction transverse to the longitudinal key axis (and is not, for instance, open along the longitudinal key axis). In other words, the respective flattened portion 94 is inclined relative to the corresponding shaft broad side 84 with respect to an axis which extends along or in parallel with the longitudinal key axis.
(49) The flattened portion 94 can have a smooth surface so that no recesses (such as a bore) and/or elevated portions are formed thereon. Alternatively, however, at least one bore and/or at least one elevated portion can also be provided on the flattened portion 94 (not shown). The flattened portion 94 can in particular extend in parallel with or obliquely to or sectionally in parallel with and sectionally obliquely to the plane 92 of the corresponding shaft broad side 84. The flattened portion 94 can, for example, be inclined relative to the plane 92 of the shaft broad side 84 by an angle which can be in the range between 2 and 25 degrees. The flattened portion 94 can in particular also have an at least slightly curved contour, viewed transversely to the key axis. In the embodiment in accordance with FIG. 2b, the respective flattened portion 94 is concavely curved in a direction transverse to the key axis.
(50) As can furthermore be seen in FIG. 2a, the narrow sides 82a of the shaft tip 60 extend toward the end face 85 toward one another like a roof. The narrow sides 82a thus extend in an oblique and tapering manner toward the end face 85.
(51) In addition, the narrow sides 82a of the shaft tip 60 taper at the end of the shaft tip 60 remote from the end face 85 so that the tip 60 is set off from the remaining part of the shaft 81 by a peripheral notch 96 at the narrow sides 82a. The slide block 56 can latch into this notch 96 on the transition from the starting position (FIG. 4) into the initial position (FIG. 7). Viewed from the key tip 60, a further, second peripheral notch 98 can be formed behind the notch 96 at the narrow sides 82 of the shaft 81 into which a blocking disk 102 associated with the second notch 98 engages on the rotation of the key 24 (cf. FIG. 1). On a use of a non-matching key without a corresponding second notch 98, the blocking disk 102 can block a rotation of the key in the lock cylinder 100. The security against manipulation can thus be increased.
(52) The further actuation of the lock cylinder 100 starting from the zero position will now be explained again in the following.
(53) As FIG. 11 shows, the control element 54 moves out of engagement with the control cut-out 70 of the front lift disk 48 in the zero position in that the control element 54 is brought radially outwardly into engagement with a control element reception recess 104 which is formed at the inner side of the cylinder housing 12. The disk housing 14 is thereby fixed against a rotation at the cylinder housing 12, whereas the fixing of the front lift disk 48 at the disk housing 14 effected by the control element 54 is canceled.
(54) As FIG. 11 furthermore shows, the core pin 46 is also urged radially outwardly out of the fixing cut-out 72 of the front lift disk 48 in the zero position so that the core pin 46 comes into engagement with a core pin reception recess 106 provided at the inner wall of the cylinder housing 12. A blocking of the rotation of the front lift disk 48 with respect to the disk housing 14 effected by the core pin 46 is thus canceled. In contrast, the core pin 46 fixes the disk housing 14 against a rotation at the cylinder housing 12 due to the engagement of the core pin 46 into the core pin reception recess 106.
(55) As FIG. 12 shows, the core pin 46 also moves out of engagement with the corresponding fixing cut-out 72 and into engagement with the core pin reception recess 106 with respect to the rear lift disk 50, with said core pin reception recess extending e.g. in the form of an elongate groove over substantially the total length of the inner wall of the cylinder housing 12. The fixing of the rear lift disk 50 effected by the core pin 46 with respect to the disk housing 14 is canceled.
(56) In a corresponding manner, the core pin 46 also moves out of engagement with the fixing cut-outs 44 of the disk tumblers 16 so that the blocking of the disk tumblers 16 with respect to the disk housing 14 in the zero position is canceled and the disk tumblers 16 are now released for a sorting. This sorting now takes place, as explained, by cooperation of the incisions 26 of the key 24 with the inner walls or boundaries of the reception openings 18 of the disk tumblers 16.
(57) FIG. 13 shows the end sorting position after the rotary disk block 58 has been transposed into the release position, as explained, by a rotational movement of the key tip 60.
(58) As FIG. 14 shows, the front lift disk 48 is rotated in the end sorting position such that the peripheral cut-out 108 provided at the outer periphery of the front lift disk 48 is oriented radially in alignment with the control element 54. In addition, the fixing cut-out 72 is oriented radially in alignment with the core pin 46.
(59) The disk tumblers 16 are sorted in the end sorting position. The blocking cut-outs 20 of the disk tumblers 16 (cf. FIG. 1) and accordingly also the blocking cut-out 20 of the rear lift disk 50 are in particular oriented in alignment with one another, viewed in the direction of the cylinder axis, and are arranged radially inwardly with respect to the blocking pin 22. In addition, in the end sorting position, the fixing cut-outs 44 of the disk tumblers 16 are arranged radially inwardly with respect to the core pin 46 in a corresponding manner to the fixing cut-out 72 of the rear lift disk 50 in accordance with FIG. 15 and are oriented in alignment with one another, viewed in the direction of the cylinder axis.
(60) FIGS. 16, 19 and 22 show the same cross-sectional plane as FIGS. 4, 7, 10 and 13. However, in FIG. 16 the key 24 is in a so-called unblocking position rotated further in the unlatching direction D with respect to the end sorting position of FIG. 13. In FIG. 19, the key 24 is in a so-called unblocked position and in FIG. 22 the key 24 is in the unlatched position.
(61) FIGS. 17, 20 and 23 show the same cross-sectional plane as FIGS. 5, 8, 11 and 14. In this respect, FIG. 17 relates to the unblocking position, whereas FIG. 20 shows the unblocked position and FIG. 23 shows the unlatched position. Accordingly, FIGS. 18, 21 and 24 show the same cross-section plane as FIGS. 6, 9, 12, and 15. FIG. 18 in this respect shows the situation in the unblocking position, whereas FIG. 21 shows the unblocked position. FIG. 24 furthermore shows the situation in the unlatched position.
(62) As can be seen by a comparison of FIGS. 14 and 17, on a further rotation of the key 24 in the unlatching direction D out of the end sorting position, both the control element 54 and the core pin 46 are urged radially inwardly. In this respect, the core pin 46 comes into engagement with the fixing cut-out 72 of the front lift disk 48 or of the rear lift disk 50. The fixing cut-out 72 is disposed radially inwardly of the core pin 46. The control element 54 furthermore comes into engagement with the peripheral cut-out 108 of the front lift disk 48 and out of engagement with the control element reception recess 104 formed in the cylinder housing 12. A fixing of the front lift disk 48 with the disk housing 14 takes place by the inward movement of the core pin 46 and of the control element 54.
(63) As can in particular be seen in FIGS. 11, 14 and 17, the front lift disk 48 has an abutment 110 at the outer periphery which comes into contact with a counter-abutment 112 provided at the disk housing 14 on a reaching of the end sorting position in accordance with FIG. 14 (a corresponding abutment is also provided at the rear lift disk 50). By a further rotation of the front lift disk 48 coupled to the key 24 and of the rear lift disk 50 in the unlatching direction D out of the end sorting position in accordance with FIG. 14, the disk housing 14 is thus co-moved due to the interplay between the abutment 110 and the counter-abutment 112. In this respect, the disk housing 14 urges the core pin 46 toward a core pin guide chamfer 114 which bounds the core pin reception recess 106, viewed in the unlatching direction D, and by which the core pin 46 is urged at a precisely defined position of angular rotation into the fixing cut-outs 72 of the lift disks 48, 50 and into the fixing cut-outs 44 of the disk tumblers 16 (cf. FIGS. 17 and 18).
(64) In a corresponding manner, on a rotation of the disk housing 14 out of the end sorting position, the disk housing 14 urges the control element 54 toward a control element guide chamfer 116 which bounds the control element reception recess 104, viewed in the unlatching direction D, and by which the control element 54 is urged radially inwardly into the peripheral cut-out 108 of the front lift disk 48 at a defined angular position (cf. FIG. 17). The angular position of the disk housing 14 can hereby be defined with a particularly high precision, in which angular position the disk housing 14 is decoupled from the cylinder housing 12 (for the subsequent unlatching) and coupled to the front lift disk 48 (and thus to the key 24).
(65) As is shown with respect to FIG. 15, the blocking pin reception recess 74 of the cylinder housing 12 offers a larger rotational clearance (in particular in the unlatching direction D) in the end sorting position with respect to the core pin reception recess 106 and the control element reception recess 104 so that the blocking pin 22 is not yet first urged radially inwardly into the blocking cut-out 20 of the rear lift disk 50 and accordingly into the blocking cut-outs 20 of the disk tumblers 16 (cf. FIG. 18) on a further rotation of the disk housing 14 in the unlatching direction out of the end sorting position.
(66) As FIGS. 18 and 21 show, the blocking pin 22 only moves into contact with a blocking pin guide chamfer 118 bounding the blocking pin reception recess 74 in the unlatching direction D on a reaching of the unblocking position. The blocking pin guide chamfer 118 urges the blocking pin 22 radially inwardly on the further rotation of the disk housing 14 from the unblocking position into the unblocked position in accordance with FIG. 24 so that the blocking pin 22 moves into engagement with the blocking cut-outs 20 of the rear lift disk 50 and of the disk tumblers 16. The key 24 can then be further rotated together with the disk housing 14 and the disks 16, 48, 50 into the unlatched position in accordance with FIGS. 22, 23 and 24 in order, as explained, to actuate a lock mechanism by means of the attachment 62.
(67) It can thus be simply achieved with the lock cylinder 100 in accordance with the above explanations that, on the rotation of the disk housing 14 by means of the key 24 out of the end sorting position and in the unlatching direction D, the core pin 46 first moves into the fixing cut-outs 72 of the lift disks 48, 50 and into the fixing cut-outs 44 of the disk tumblers 16 (cf. FIG. 1) and hereby fixes the disk tumblers 16 relative to one another and to the disk housing 14 and that (due to an even further rotation of the disk housing 14) the blocking pin 22 only then engages into the blocking cut-outs 20 to release the disk housing 14 for a further rotation into the unlatching position. Due to the explained different rotational clearance or to the explained defined time sequence, the blocking pin 22 can therefore not be urged radially inwardly with the aid of the blocking pin guide chamfer 118 at a time at which the disk tumblers 16 can still be separately rotated (e.g. by means of a picking tool). A probing of the respective encoding of the individual disk tumblers 16 is therefore hereby prevented.
(68) For the latching, the rotation of the key 24 takes place, starting from the unlatched position in accordance with FIGS. 22, 23 and 24, against the direction of rotation D up to the initial position. The procedure and the cooperation of the individual elements of the lock cylinder 100 can be seen from the above description.
(69) The front lift disk 48 has at its outer periphery a second abutment 120 which comes into contact with a second counter-abutment 122 provided at the disk housing 14 (cf. FIG. 11) on the rotating back of the front lift disk 48 from the end sorting position (cf. FIG. 14) against the unlatching direction D, that is in the latching direction, on reaching the zero position. A corresponding abutment is also provided at the rear lift disk 50. The disk housing 14 can be co-rotated due to the interplay between the second abutment 120 and the second counter-abutment 122 by a rotation of the lift disks 48, 50 back out of the zero position in the latching direction to urge the control element 54 and the core pin 46 radially inwardly (cf. in particular FIGS. 8 and 11).
REFERENCE NUMERAL LIST
(70) 10, 100 lock cylinder 12 cylinder housing 14 disk housing 16 disk tumbler 18 reception opening 20 blocking cut-out 22 blocking pin 24 key 26 incision 32 slit 34 blocking pin reception recess 36 intermediate disk 38, 38a peripheral cut-out 40 abutment section 42 projection 44 fixing cut-out 46 core pin 48 front lift disk 50 rear lift disk 52 cover 54 control element 56 slide block 58 rotary slide block 60 key tip 62 attachment 64 clamp 66 rotary slide block reception recess 68 slide block reception recess 70 control cut-out 72 fixing cut-out 74 blocking pin reception recess 78 driven flank 80 drive flank 81 shaft 82, 82a narrow side 84, 84a broad side 85 end face 86 first abutment surface 88 second abutment surface 90 third abutment surface 92 plane 94 flattened portion 96 notch 98 second notch 102 blocking disk 104 control element reception recess 106 core pin reception recess 108 peripheral cut-out 110 abutment 112 counter-abutment 114 core pin guide chamfer 116 control element guide chamfer 118 blocking pin guide chamfer 120 second abutment 122 second counter-abutment A introduction direction D unlatching direction
