EP0764750A1 - Lock system - Google Patents

Abstract

The cylinder locks have a casing-shaped outer core (13) and a cylinder core (14) with a key channel (15) for insertion of the flat keys (16'). The cylinder core with the key channel is rotatable in the casing-shaped outer core secured against rotation in the cylinder housing and the outer core together with the cylinder with the main key is rotatable in the cylinder housing (12). The spring-loaded retention pins are formed by core pins (21a-26a) engaging in the cylinder core and esp. housing pins (21c-26c) engaging in the cylinder housing. A middle pin (21b,23b,26b) is arranged at least between a pair comprising a core pin and a housing pin.

Description

The invention relates to a locking system consisting of a plurality of cylinder locks and flat keys, which comprise at least a master key and an individual key.

According to AT 382 194 A2, the cylinder lock comprises a cylinder housing having spring-loaded tumbler pins, a sleeve-shaped outer core and a cylinder core with a key channel for inserting the flat key. The cylinder core having the key channel can be rotated with the individual key in the sleeve-shaped outer core secured against rotation in the cylinder housing, and the outer core is in turn rotatably mounted in the cylinder housing together with the cylinder core with the master key. The tumbler pins are formed by core pins which engage in particular in the cylinder core and in particular housing pins which engage in the cylinder housing. A center pin is disposed at least between a pair of a core pin and a housing pin. Depending on whether the master key or an individual key is inserted or removed in the key channel of the cylinder core, the separation planes between the individual core, center and housing pins run differently.

According to DE 44 10 908 C1, the sleeve-shaped outer core, which can be rotated together with the cylinder core by the master key, has a wall-penetrating slot for the engagement of a rib provided in the longitudinal direction on the spine of the key and which aligns with the outer lateral surface of the sleeve-shaped outer core . The sleeve-shaped outer core also has a recess in the area of the slot for a snap-in of one of the housing pins. With the cylinder lock for locking systems of this type, there are two possible courses of the parting planes between the core, center and housing pins. When the individual keys are fully inserted, the parting planes of the core pins are flush with the jacket of the cylinder core, which can then be turned relative to the outer core. The outer core is locked to the cylinder housing by means of center pins and / or by housing pins. When the master key is fully inserted, the tumbler pins are arranged in such a way that the parting planes between the housing pins are flush with the jacket of the outer core, which is then rotated with the rotation of the master key. The outer core is coupled to the cylinder core by center pins and / or by housing pins.

The invention has for its object to increase the security of the aforementioned locking system. In addition to the security against manipulation of the lock compared to counterfeit individual keys, whose notch profile was inadmissibly adapted to the notches of the master key, a greater variety of keys and / or locks of the system is to be achieved.

This is achieved according to the invention in that the sleeve-shaped outer core contains only a part of the spring-loaded tumbler pins has overlapping length, while the remaining number of spring-loaded tumbler pins is covered by at least one further auxiliary outer core, that at least one of the individual keys on the spine of the key is provided with a rib that is shorter than the length of the rib of the master key, that the auxiliary outer core has a continuous one. Has slot for the engagement of the rib of the single key and the rib of the master key, and is then rotatable together with the cylinder core, and that the rib of the single key in the fully inserted position in the key channel extends at most to the inner end of the auxiliary outer core. These measures are of particular importance.

First of all, there is a greater variety of variations of the locking system according to the invention, because it increases the permutations of the lock or the key significantly without increasing the number of tumbler pins. In addition to the previously mentioned gradients of the parting planes when using the main and individual keys, a further parting plane progression is added to the individual key. This new course of the parting planes is graded along the cylinder lock. The parting line runs in the area of the outer core, where it is determined by the core pins, flush with the jacket of the cylinder core. The cylinder core can therefore be rotated by means of this single key, the outer core being locked against the cylinder housing partly by means of central pins and partly by housing pins. In the area of the auxiliary outer core, on the other hand, the parting plane is similar to when using a master key. In this area, the tumbler pins are arranged in such a way that the parting plane here lies between the housing pins or center pins, flush with the jacket of the auxiliary outer core, and the auxiliary outer core is also rotated when this individual key is turned. The auxiliary outer core is coupled to the cylinder core by the core pins.

In this way, a hierarchy of three courses of the parting levels is easily created for the keys of the locking system. The first parting line is generated by the master key or keys. When closing with the master key, which has a long rib, both the outer core and the auxiliary outer core are rotated together with the cylinder core, and the parting plane is formed continuously; it runs between the outer core and auxiliary outer core on the one hand and the cylinder housing on the other. When closing with a single key, which has a short rib, the auxiliary outer core is rotated together with the cylinder core. The course of the parting plane is stepped in this case, namely on the one hand between the auxiliary outer core and the cylinder housing and on the other hand between the cylinder core and the outer core. When closing with a rib-free individual key, only the cylinder core is turned and the parting plane runs continuously between the cylinder core and the auxiliary outer core on the one hand and the auxiliary outer core on the other.

According to one embodiment of the invention, it is also possible to form the rotatable auxiliary outer core in one piece with the cylinder core. The auxiliary outer core has in this case the function of a spacer, which causes the graduation of the parting plane when closing with a single key according to the invention. In this case, the last-mentioned third parting plane between the cylinder core and the outer core is omitted. This reduces the number of permutations, but increases security. The exchange of a two-piece version for a one-piece design of the auxiliary outer core with the cylinder core or vice versa comes into consideration, for example, if a certain group of people is to be denied or additionally allowed access to rooms which are secured with the locking system.

Another advantage of the locking system according to the invention results when the rib of the individual key with the outer surface of the Auxiliary outer core is adjusted and the auxiliary outer core also has at least one depression in the region of its slot for a snap-in of one of the housing pins. The locking system also gains additional security in this way. Depending on the embodiment of the invention, when using a manipulated, or already a regular, rib-free individual key, only a rotation of 180 ° can be carried out until one or more of the housing pins snap into depressions in the auxiliary outer core and prevent further rotation of the key. The cylinder lock can therefore not be opened with these wrong keys.

Fig. 1

eine erste Ausführungsform der erfindungsgemäßen Schließanlage im Längsschnitt durch ein Zylinderschloß mit eingestecktem Einzelschlüssel, der eine kurze Rippe aufweist, längs der Schnittlinie I - I von Fig. 10.

Fig. 2

in einer der Fig. 1 entsprechenden Darstellung eine zweite Ausführungsform der Erfindung,

Fig. 3

das Zylinderschloß der ersten Ausführungsform von Fig. 1, wenn ein Einzelschlüssel ohne Rippe eingesteckt ist,

Fig. 4

das Zylinderschloß von Fig. 1, wenn ein Hauptschlüssel eingesteckt ist,

Fig. 5

einen Axialschnitt durch den Hilfsaußenkern in der ersten Ausführung der Erfindung von Fig. 1,

Fig. 6

einen Axialschnitt durch den Außenkern des in Fig. 1 gezeigten Schließzylinders,

Fig. 7 u. 8

eine Draufsicht auf den Hilfsaußenkern von Fig. 5 bzw. Außenkern von Fig. 6,

Fig. 9

eine Draufsicht auf die zweite mit dem Zylinderkern einstückige Ausführung des Hilfsaußenkerns von Fig. 2,

Fig. 10

einen Querschnitt längs der Schnittlinie X - X von Fig. 1,

Fig. 11

einen der Fig. 10 entsprechenden Schnitt, wobei der Zylinderkern zusammen mit dem Hilfsaußenkern um 180° gedreht ist,

Fig. 12

einen Querschnitt längs der Schnittlinie XII - XII von Fig. 1,

Fig. 13

einen der Fig. 12 entsprechenden Schnitt, wobei der Zylinderkern gegenüber Fig. 12 um 180° gedreht ist,

Fig. 14

einen Horizontalschnitt gemäß der versprungenen Schnittlinie XIV - XIV von Fig. 10,

Fig. 15

in Analogie zu Fig. 12 einen Querschnitt längs der Schnittlinie XV - XV der Fig. 2, aber bei Verwendung eines gefälschten Schlüssels, der nicht zulässig ist,

Fig. 16

in Analogie zu Fig. 13, einen der Fig. 15 entsprechenden Querschnitt, wobei aber der mit dem Hilfsaußenkern einstückige Zylinderkern gegenüber Fig. 15 um 180° gedreht ist,

Fig. 17, 18

die mit den Fig. 10 bis 14 analogen Verhältnisse im Querschnitt längs der Schnittlinie XVII - XVII von Fig. 4 in zwei Drehstellungen des Zylinderkerns ,

Fig. 19

in Analogie zu Fig. 14 einen Horizontalschnitt längs der versprungenen Schnittlinie IXX - IXX von Fig. 17 und

Fig. 20-22

die analogen Verhältnisse zu Fig. 17 bis 19 wenn allerdings, anstelle des Hauptschlüssels, ein manipulierter Schlüssel verwendet wird.

Further measures and advantages of the invention result from the further claims, the following description and the drawings. Several embodiments of the invention are shown in the drawings. Show it:

Fig. 1

a first embodiment of the locking system according to the invention in longitudinal section through a cylinder lock with an inserted single key, which has a short rib, along the section line I - I of Fig. 10.

Fig. 2

1 corresponding representation of a second embodiment of the invention,

Fig. 3

the cylinder lock of the first embodiment of Fig. 1 when a single key is inserted without a rib,

Fig. 4

the cylinder lock of Fig. 1 when a master key is inserted,

Fig. 5

an axial section through the auxiliary outer core in the first 1 embodiment of the invention,

Fig. 6

2 shows an axial section through the outer core of the locking cylinder shown in FIG. 1,

Fig. 7 u. 8th

5 shows a plan view of the auxiliary outer core from FIG. 5 or outer core from FIG. 6,

Fig. 9

3 shows a plan view of the second embodiment of the auxiliary outer core of FIG. 2, which is integral with the cylinder core,

Fig. 10

2 shows a cross section along the section line X - X from FIG. 1,

Fig. 11

10 a section corresponding to FIG. 10, the cylinder core being rotated through 180 ° together with the auxiliary outer core,

Fig. 12

2 shows a cross section along the section line XII-XII from FIG. 1,

Fig. 13

12 shows a section corresponding to FIG. 12, the cylinder core being rotated through 180 ° with respect to FIG. 12,

Fig. 14

10 shows a horizontal section according to the jumped section line XIV-XIV from FIG. 10,

Fig. 15

analogous to FIG. 12, a cross section along the section line XV - XV of FIG. 2, but if a counterfeit key is used, which is not permitted,

Fig. 16

in analogy to FIG. 13, one corresponding to FIG. 15 Cross section, but the cylinder core which is integral with the auxiliary outer core is rotated by 180 ° with respect to FIG. 15,

17, 18

10 to 14 analogous relationships in cross section along the section line XVII - XVII of Fig. 4 in two rotational positions of the cylinder core,

Fig. 19

in analogy to FIG. 14, a horizontal section along the jumped section line IXX - IXX from FIG. 17 and

Fig. 20-22

17 to 19 if, however, a manipulated key is used instead of the master key.

The drawings show only one of the cylinder locks of the locking system with the flat key inserted. The cylinder lock consists of a cylinder housing 12, a sleeve-shaped outer core 13 and a secondary auxiliary outer core 13 'and a cylinder core 14. The cylinder core 14 has a key channel 15 for inserting a flat key. The cylinder lock can be operated with different keys 16, 16 ', 16' ', 17. 1, 2 and 10 to 14, the actuation with a specially designed individual key 16 'is shown, while FIG. 3 shows the actuation with a simple individual key 16. FIG. 4 illustrates the actuation with a master key 17 and FIGS. 15 and 16 show the unsuccessful attempt to actuate with an impermissible, manipulated key 16 ″.

As can be seen in particular from the comparison of FIGS. 12 and 13, the cylinder core 14 is rotatably mounted in the sleeve-shaped outer core 13 in the direction of the arrow 36. The sleeve-shaped outer core 13 is in turn how 17, 18 can be seen from the rotary arrow 38, rotatable in the cylinder housing 12. It can be seen from the comparison of FIGS. 10 and 11 that in a first embodiment of the invention the cylinder core 14 is also rotatably mounted in the auxiliary outer core 13 '. In contrast, FIGS. 1, 15 and 16 illustrate a second embodiment of the invention, where the cylinder core 14 is integral with the auxiliary outer core 13 '.

In the case 12, six blind bores 18a to 18f are arranged one behind the other in the cylinder housing 12 axially, that is to say in the longitudinal direction of the cylinder core 14. Aligned with these blind bores 18a to 18f in the cylinder housing 12, two bores 19a 'and 19b' run in the auxiliary outer core 13 'and four bores 19a to 19d in the sleeve-shaped outer core 13. The holes 18a, 19a, 19a ', 20a each lie on the side facing the entrance of the key channel 15, while the other holes 18f, 19d, 19b', 20f are arranged on the opposite side. Spring-loaded tumbler pins 21a to 21c are arranged in the respective bore 18a of the cylinder housing 12, 19a 'of the auxiliary outer core 13' and 20a of the cylinder core 14. The tumbler pin 21a shall be referred to as the "core pin", the tumbler pin 21b as the "center pin" and the tumbler pin 21c as the "housing pin". A compression spring 21d is arranged on the bottom of the blind bore 18a.

The further bores contain the spring-loaded tumbler pins designated 22a to 26a in an analogous manner, but the core pins 22a, 24a and 25a have no center pins. The bores 18b, 19b ', 20b correspond with the tumbler pins 22a to 26c; 18c, 19a, 20c; 18d, 19b, 20d; 18e, 19c, 20e; 19f, 19d, 20f.

As can be seen in particular from FIG. 1, the core pins 21a and 22a are arranged in such a way that they are flush with the outer circumferential surface 29 'of the single key 16' which is completely inserted into the cylinder lock Auxiliary outer core 13 'and the inner circumferential surface 30 of the cylinder housing 12 are located. The core pins 23a to 26a are arranged in such a way that they lie flush with the outer circumferential surface 27 of the cylinder core 14 and the inner circumferential surface 28 of the sleeve-shaped outer core 13. In this way, the cylinder core 14 and the auxiliary outer core 13 'connected to it by the core pins 21a and 22a can be rotated with the single key 16' in the direction of the arrows 38 'of FIGS. 10, 11. The parting plane is stepped, namely between the core pin 21a and the center pin 21b, the core pin 22a and the housing pin 22c, the core pin 23a and the center pin 23b, the core pin 24a and the housing pin 24c, the core pin 25a and the housing pin 25c, the core pin 26a and the center pin 26b. The step lies between the tumbler pins 22 and 23. The sleeve-shaped outer core 13 is locked partly against the housing by the middle pins 23b and 26b and partly by the housing pins 24c and 25c, and thus has become part of the cylinder housing 12, so to speak, while the auxiliary outer core 13 ' through the coupling via the core pins 21a and 22a, it has become a part of the cylinder core 14. As can be seen from FIG. 1, the auxiliary outer core 13 'has a shorter length 34' than the length 34 of the outer core 13.

The auxiliary outer core 13 ', which can be rotated together with the cylinder core 14 with the individual key 16' according to the invention, is provided with a continuous slot 31 'extending through the wall thickness for the engagement of a rib which is provided on the back of the key and runs in the longitudinal direction and matches the outer lateral surface 29' of the auxiliary outer core 13 ' 32 'provided. The rib 32 'of the single key 16' in the fully inserted position in the key channel 15 extends to the inner end 35 of the auxiliary outer core 13 '. As a result, this rib-carrying individual key 16 'is connected in a simple manner to the auxiliary outer core 13' in a form-fitting, rotationally fixed manner.

As shown in FIG. 14 in particular, the auxiliary outer core 13 'in the region of the slot 31' has a depression 33 'which is suitable for the housing pin 22c to snap into place. When using a regular rib-carrying single key 16 ', this depression 33' is largely filled by the rib 32 ', so that after turning the auxiliary outer core 13' together with the cylinder core 14, the housing pin 22c cannot snap into the depression 33 ' . Although FIG. 15 shows a cross section through an analog cylinder lock according to the section line XV-XV of FIG. 2, instead of the correct individual key 16 ′ shown in FIG. 2 with the rib 32 ′, a manipulated individual key 16 ″ has been used, which no rib 32 'shows. Complete rotation 38 ″ of the cylinder core 14 combined with the auxiliary outer core 13 ′ is not possible here. After a rotation through 180 °, as shown in FIG. 16, with this manipulated key 16 ″, the housing pin 22c falls into the depression 33 ′ and prevents further rotation.

Such a depression 33 in the auxiliary outer core 13 'and the corresponding rib 32' on the proper individual key 16 ', as shown in FIG. 1, may be dispensed with. This is because, as will be explained in more detail below, the outer core already has two suitable depressions 33 in the region of its slot 31 for snap-in of the housing pins 23c and 24c, provided that a rib-free key 16 is used. The latter is finally explained in more detail with reference to FIGS. 20 to 22. When using the individual key 16 'with rib 32', as shown in FIGS. 12 and 13, the housing pins 23c and 24c do not snap into the depressions 33 in the outer core 13, since only the cylinder core 14 in the sense of FIG Arrows 36 is rotated.

The representation shown in FIG. 2, as has already been said, differs from the representation in FIG. 1 in that the rotatable auxiliary outer core 13 'is formed in one piece with the cylinder core 14. The is clear from the representation of the individual parts shown in FIG. 9 of the auxiliary outer core 13 'connected to the cylinder core 14.

In Fig. 3 the cylinder lock is shown with a fully inserted rib-free individual key 16. The core pins 21a to 25a and the central pin 26b are arranged in such a way that they lie flush with the outer lateral surface 27 of the cylinder core 14. The core pins 21a and 22a are flush with the inner lateral surface 28 'of the auxiliary outer core 13'. The core pins 23a to 25a and the center pin 26b, however, lie flush with the inner circumferential surface 28 of the outer core 13. In this way, the cylinder core 14 can be rotated with the rib-free individual key 16. The parting plane initially runs, as in FIG. 1, between the core pin 23a and the center pin 23b, furthermore the core pin 24a and the housing pin 24c, and finally the core pin 25a and the housing pin 25c. 1, the parting plane lies in the last piece between the central pin 26b and the housing pin 26c. This parting plane is aligned with the parting planes between the core pin 21a and the center pin 21b and the core pin 22a and its housing pin 22b. The sleeve-shaped outer core 13 is thus locked in relation to the housing 12 and has thus become a part of it.

A comparison between FIGS. 1 and 3 shows that the individual key 16 'having a short rib 32' and the smooth, rib-free individual key 16 have different depths of the notches, particularly in the area of the spring-loaded tumbler pins 21 and 22. This increases the number of possible permutations in the invention. If, in the case of FIG. 3, a one-piece design of the rotatable auxiliary outer core 13 'with the cylinder core 14 according to FIG. 2 is used, then the cylinder core 14 cannot be rotated with the smooth individual key 16. The rotation would be blocked by the central pin 21b and the housing pin 22c, which would then engage in the bores 20a or 19a 'and 20b or 19b'.

4, the cylinder lock is shown with the master key 17 fully inserted. The housing pins 21c to 26c are arranged in such a way that the parting plane is flush and stepless between the outer surface 29 'of the auxiliary outer core 13' or the outer surface 29 of the sleeve-shaped outer core 13 and the inner surface 30 of the cylinder housing 12. Fig. 4 shows, like Figs. 1 and 3, the first embodiment of the invention. The master key 17 has a notch profile where the parting plane between the housing pins 21c to 26c and the adjacent central or core pins are on the lateral surfaces 29 'and 29 of the auxiliary outer core 13' and outer core 13, respectively. When the master key 17 is turned, both outer core parts 13, 13 'thus rotate together with the cylinder core 14.

As can be seen from FIGS. 4 and 7 and 8, the correct master key 17 has a long rib 32, which not only moves into the slot 31 'of the auxiliary outer core 13' already described above, but also into the corresponding slot 31 of the adjacent outer core 13 engages. This can also be seen from Fig. 19. The mode of operation results from FIGS. 17 and 18, where a cross section through the cylinder lock of FIG. 4 along the section line XVII - XVII is shown in two positions. Fig. 17 shows the starting position. When the key is turned, both the auxiliary outer core 13 'are taken along, as has been described with the aid of the rotating arrows 38' in FIGS. 10 and 11 for the rib-carrying individual key 16 ', and the outer core 13 is moved in the sense of the rotating arrows 38 in FIGS. 17 and 18 . After half a turn, the long rib 32, as shown in FIG. 18, fills the depression 33 in the peripheral region of the outer core 13 as well as the depression 33 'in the adjacent auxiliary outer core 13'. The tumbler pins located there, for example the housing pins 24c shown in FIGS. 17 and 18, cannot move into the associated depression. It is possible to turn the correct master key 17.

20 to 22, as already mentioned above, show the situation analogous to FIGS. 17 to 19, but with a key 17 'manipulated with respect to the master key 17. This has no rib that could engage in the slot 31 or 31 'of the two outer core parts 13, 13'. As a result, as is illustrated in FIG. 20 by the arrow 39, half a rotation of the cylinder core 14 and the two outer cores 13, 13 'is possible. Then, as shown in FIG. 21, a tumbler pin moves into the associated depression 33, as is illustrated by the housing pin 24c. This happens because of the spring loading, as is emphasized by the force arrow 40 in FIG. 21. An opening of the lock by means of the counterfeit master key 17 'is therefore impossible.

The cylinder locks of the locking system according to the invention can be designed differently from the exemplary embodiments shown. So you can of course vary the number of tumbler pins 21a to 26c. The number of tumbler pins 21a to 22c provided in the auxiliary outer core 13 'should comprise at most half of all spring-loaded tumbler pins 21a to 26c. The length 34 ′ of the auxiliary outer core 13 ′ illustrated in FIG. 1 should in any case be smaller than the length 34 of the adjacent outer core 13. Likewise, the length 41 'of the rib 32' shown in FIG. 14 of the individual key 16 'will be a maximum of half as long as the length 41 of the rib 32 shown in FIG. 19 for the master key 17. Finally, in the sense of a profile variation, the width 37 ′ of the rib 32 ′ shown in FIG. 14 could also differ from the width 37 of the rib 32 in FIG. 19. The above-described ribs 32, 32 'and the slots 31, 31' receiving them could be arranged offset with respect to the exemplary embodiments. The ribs 32, 32 'could sit on a broad side of the key. This results in further variation options. Instead of only of an auxiliary outer core 13 ', a plurality of auxiliary outer cores could also be arranged side by side, which work independently of one another.

Reference symbol list:

12th

Cylinder housing

13

sleeve-shaped outer core

13 '

Auxiliary outer core

14

Cylinder core

15

Key channel

16

Single key

16 '

Single key with 32 '

16 ''

manipulated single key (Fig. 15, 16)

17th

Master key

17 '

manipulated master key (Fig. 20 to 22)

18a

Blind hole in 12

18b

Blind hole in 12

18c

Blind hole in 12

18d

Blind hole in 12

18e

Blind hole in 12

18f

Blind hole in 12

19a

Hole in 13

19b

Hole in 13

19c

Hole in 13

19d

Hole in 13

19a '

Bore in 13 '

19b '

Bore in 13 '

20a

Hole in 14

20b

Hole in 14

20c

Hole in 14

20d

Hole in 14

20e

Hole in 14

20f

Hole in 14

21a

Core pin

21b

Center pin

21c

Housing pin

21d

Helical compression spring

22a

Core pin

22c

Housing pin

22d

Helical compression spring

23a

Core pin

23b

Center pin

23c

Housing pin

23d

Helical compression spring

24a

Core pin

24c

Housing pin

24d

Helical compression spring

25a

Core pin

25c

Housing pin

25d

Helical compression spring

26a

Core pin

26b

Center pin

26c

Housing pin

26d

Helical compression spring

27

outer lateral surface of 14

28

inner surface of 13

28 '

inner surface of 13 '

29

outer surface of 13

29 '

outer surface of 13 '

30th

inner lateral surface of 12

31

Slot in 13

31 '

Slot in 13 '

32

Rib in 17th

32 '

Rib of 16 '

33

Sink in 13

33 '

Dip in 13 '

34

Length of 13 (Fig. 1)

34 '

Length of 13 '(Fig. 1)

35

Inner end of 13 '(Fig. 1, 14)

36

Key rotation of 14 (Fig. 12, 13)

37

Width of 32 (Fig. 19)

37 '

Width of 32 '(Fig. 14)

38

Rotation of 13 (Fig. 17, 18)

38 '

Rotation of 13 '(Fig. 10, 11)

38 ''

half turn of 16 '' (Fig. 15)

39

half turn of 17 '(Fig. 20)

40

Force arrow (Fig. 21)

41

Length of 32

41 '

Length of 32 '

Claims (10)

Locking system, consisting of several cylinder locks and of at least one matching individual key (16, 16 ') and flat key (16, 16', 17) comprising a matching master key (17) with a different incision profile,
whose cylinder locks each have a spring-loaded tumbler pin (21a to 26c) in a cylinder housing (12), in a sleeve-shaped outer core (13) and in a cylinder core (14) and the cylinder core (13) has a key channel (15) for inserting the flat key (16 , 16 ', 17),
the cylinder core (14) having the key channel (15) rotatable with the individual key (16, 16 ') in the sleeve-shaped outer core (13) secured against rotation in the cylinder housing (12) and the outer core (13) together with the cylinder core (14) is rotatably mounted in the cylinder housing (12) with the master key (17),
and the spring-loaded tumbler pins (21a to 26c) are formed by core pins (21a to 26a) engaging in particular in the cylinder core (14) and in particular in the cylinder housing (12) engaging housing pins (21c to 26c) and at least between a pair of a core pin (21a to 26a) and a central pin (21b, 23b, 26b) is arranged from a housing pin (21c to 26c),
wherein the sleeve-shaped outer core (13) through the wall thickness through slot (31) for the engagement of one of the Main key (17) provided, extending in the longitudinal direction rib (32),
which, when the master key (17) is inserted, aligns with the outer circumferential surface (29) of the sleeve-shaped outer core (13),
and the sleeve-shaped outer core (13) in the region of its slot (31) has at least one depression (33) suitable for snapping the associated housing pin (21c to 26c),
characterized,
that the sleeve-shaped outer core (13) has a length (34) covering only a partial number (23a to 26c) of the spring-loaded tumbler pins (21a to 26c),
while the remaining number (21a to 22c) of the spring-loaded tumbler pins is covered by at least one additional auxiliary outer core (13 ') and can be rotated together with the cylinder core (14),
that at least one of the individual keys (16 ') has a rib (32') which is shorter (41 ') than the length (41) of the rib (32) of the master key (17),
that the auxiliary outer core (13 ') has a continuous slot (31') for the engagement of the rib (32 ') of the individual key (16') and the rib (32) of the master key (17) and then together with the cylinder core (14) is rotatable,
and that the rib (32 ') of the single key (16') in the fully inserted position in the key channel (15) extends at most to the inner end (35) of the auxiliary outer core (13 '). Locking system according to claim 1, characterized in that the auxiliary outer core (13 ') is formed in one piece with the cylinder core (14). Locking system according to claim 1 or 2, characterized in that the rib (32 ') of the individual key (16') matches the outer lateral surface (29 ') of the auxiliary outer core (13') and the auxiliary outer core (13 ') in the region of its slot ( 31 ') has a depression (33') suitable for snapping in at least one of the housing pins (21c to 22c). Locking system according to one of claims 1 to 3, characterized in that the remaining number of spring-loaded tumbler pins (21 to 26) covered by the rotatable auxiliary outer core (13 ') comprises at most half (21 to 23) of all spring-loaded tumbler pins (21 to 26). Locking system according to one of claims 1 to 4, characterized in that the length (34 ') of the auxiliary outer core (13') is less than the length (34) of the outer core (13) and the rib provided on the key spine of the individual key (16 ') (32 ') is at most half as long as the rib (32) of the master key (17). Locking system according to one of claims 3 to 5, characterized in that the recess (33 ') of the auxiliary outer core (13') suitable for the snap-in of one of the housing pins (21c to 22c) covered by the auxiliary outer core (13 ') from the second (22c) of six housing pins (21c to 26c) is assigned. Locking system according to one of claims 1 to 6, characterized in that the outer core (13) has a plurality of depressions (33) suitable for snapping housing pins (23c to 26c). Locking system according to claim 7, characterized in that the depressions (33) of the outer core (13 ') for the snap-in of housing pins (23c to 26c) covered by the outer core (13) cover the third (23c) and fourth (24c) of six housing pins (21c to 26c) are assigned. Locking system according to one of claims 1 to 8, characterized in that the width (37 ') of the rib (32') of the individual key (16 ') deviates from the width (37) of the rib (32) of the master key (17). Locking system according to claim 9, characterized in that the width of the slot (31 ') in the auxiliary outer core (13') is different from the width of the slot (31) in the outer core (13).

Images