EP1922461B1 - Lock device with a lock cylinder and a key - Google Patents

Abstract

A lock device having a key and a lock cylinder. The lock cylinder includes a fixed cylinder housing and a cylinder core mounted to rotate therein. The key shaft (10.3) has an edge profile and may be inserted in a key way of the cylinder core in which displaceable tumblers (41, 42) are located transverse to the above. The key shaft (10.3) has profiled recesses running in the longitudinal direction. The recesses have a pair of follow points for each tumbler (41, 42) for coding the key, whilst the tumbler (41. 42) has a pair of counter follow points which are the basis of the corresponding counter coding. A space-saving design of the lock device is achieved with a large range of variation for the coding wherein both follow points are on the key shaft (10.3) in the form of recesses, arranged on opposing lateral surfaces to an edge (57.2; 57.3) of the edge profile of the key shaft (10.3). A web (22: 23) is thus generated in the corner region of the edge profile between both recesses. The web functions as a code web (22; 23), as the opposing web edges serve for the coding. The corresponding tumblers (41, 42) have a cut-out, which in use enclose the code web (22; 23) on opposing web edges. The lateral limits of the cut-out form the counter follow points in the tumblers (41, 42).

Description

The invention is directed to a locking device specified in the preamble of claim 1. Art. Such a closing device is from the DE 199 44 070 C2 known. There, the coding of the key consists of a key in the longitudinal direction extending coding groove. As sampling the associated tumblers have a projection which engages inserted key in a certain cross-section of the coding groove. The position of the projection on the tumbler depends on the coding of the groove and thus forms the corresponding counter-coding of the locking device.

From the EP 0 267 316 A1 Another locking device is known where the key has a polygonal shaft cross-section. For coding notches of different depths are embedded at the edges of the key shaft. Spring-loaded tumbler pins engage the edges of the shank cross-section and sense the depth of the notches in the corner areas of the key shank. At the top of the key shaft bevels are provided in the side surfaces between the edges, which serve to lift the tumbler pins when inserting the key.

The invention has for its object to find a reliable locking device with a new coding option. An important objective of the coding is to develop a key with a small cross-section, which is nevertheless characterized by a high variety of variations of the coding. The The object is achieved by the measures mentioned in claim 1, which have the following special significance.

The invention provides the coding in the corner regions of the edge profile of the key shaft. The scanning point pair is generated by two mutually opposite directions in adjacent side surfaces of the edge profile introduced recesses. Between the two angular cutouts a web remains in the corner area of the edge profile. In successive axial sections of the code web, opposite web flanks are offset in pairs and generate the scanning shaft pair of the key shaft thus used for coding. That's why this bridge can be called "Codesteg". The course of the code web is determined by the corner area in the edge profile. Because the code web with its two web flanks can, if necessary, also go beyond the edge in the edge profile of the key shaft, results in a small key cross section a large variety of variations in the arrangement of the two opposite web flanks of the code web serving for coding. Because the two web edges are encompassed by the lateral boundaries of a section in the tumblers, there is a forced operation. This forced operation has an advantage in locking devices in which the key acts only as an emergency key and is therefore used only in exceptional cases. With an emergency key, the tumblers in the cylinder core can become sluggish or stick together due to long unused use. The positive guidance according to the invention ensures smooth running. In such an emergency key, the normal control of the locking device is carried out by an electric remote control or by a smart card.

Because the edge profile of the key shaft usually has multiple edges. e.g. is designed as a square, an inventive code web can be arranged in each of the corner regions. At least some of these code webs may have mutually different coding in order to achieve a wide variety of variations in the closing device according to the invention.

In addition, the security against breakage is increased because the tumblers with their counter-scanning points on different code lines attack and therefore in This makes it difficult for unauthorized persons to keep track of how the closing device is to be broken up. In addition, the use of so-called picking tools for decrypting the code is more difficult.

Fig. 1a+1b.

in perspektivischer Darstellung, ein erstes und ein zweites Ausführungsbeispiel des erfindungsgemäßen Schlüssel-Schaftes,

Fig. 2.

schematisch, einen vergrößerten Eckbereich des in den Fig. 1a oder 1b gezeigten Schlüssel-Schaftes, wo Varianten zur Ausbildung eines Codestegs veranschaulicht sind, vor Ausführung der dafür erforderlichen Ausnehmungen,

Fig. 3

einen konkreten Querschnitt durch den Schlüssel-Schaft mit einem Abtaststellen-Paar beidseitig des Codestegs,

Fig. 4

einen zu Fig. 3 analogen Querschnitt durch die Schließvorrichtung, wo außer einer Codierung am Codesteg auch die entsprechende Gegencodierung an einer zugehörigen Zuhaltung gezeigt sind,

Fig. 5a. 5b

die Draufsichten auf zwei Ausführungsbeispiele einer konkreten Zuhaltung, die einem bestimmten Abtaststellen-Paar im Schlüssel von Fig. 1a, 1b zugeordnet ist,

Fig. 6,

in perspektivischer Darstellung, ein drittes Ausführungsbeispiel eines erfindungsgemäßen Schlüssel-Schaftsmit zwei Zuhaltungen, die an zwei zueinander unterschiedlichen Codestegen angreifen,

Fig. 7a+7b,

in Vergrößerung, zwei Querschnitte durch den in Fig. 6 gezeigten Schlüssel-Schaft längs der dortigen Schnittebenen VIIa - VIIa bzw. VIIb - VIIb.

Fig. 7c

einen Querschnitt durch eine komplette erfindungsgemäße Schließvorrichtung mit einem Schließzylinder und Schlüssel-Schaft,

Fig. 8

eine Draufsicht auf den bereits in Fig. 6 gezeigten Schlüssel-Schaft und

Fig. 9+10

zwei Querschnitte durch den Schlüssel-Schaft von Fig. 8 längs der Schnittebenen IX - IX und X - X.

In the drawings, the invention is explained with reference to several embodiments. Show it:

Fig. 1a + 1b.

in a perspective view, a first and a second embodiment of the key-shaft according to the invention,

Fig. 2.

schematically, an enlarged corner of the in the Fig. 1a or 1b shown key shank, where variants for forming a code web are illustrated, before executing the necessary recesses,

Fig. 3

a concrete cross section through the key shaft with a pair of scanning points on both sides of the code web,

Fig. 4

one too Fig. 3 analog cross section through the locking device, where in addition to a coding on the code web and the corresponding counter-coding are shown on an associated guard,

Fig. 5a. 5b

the top views of two embodiments of a concrete tumbler, the particular sampling pair in the key of Fig. 1a, 1b assigned,

6,

in a perspective view, a third embodiment of a key shaft according to the invention with two tumblers that engage two mutually different code strings,

Fig. 7a + 7b,

in magnification, two cross sections through the in Fig. 6 shown key shaft along the local cutting planes VIIa - VIIa or VIIb - VIIb.

Fig. 7c

a cross section through a complete locking device according to the invention with a lock cylinder and key shaft,

Fig. 8

a top view of the already in Fig. 6 shown key shaft and

Fig. 9 + 10

two cross sections through the key shaft of Fig. 8 along the cutting planes IX - IX and X - X.

In Fig. 1 a first embodiment 10.1 of a key shaft is shown; which has a cantilever 17. This edge profile 17 is designed here as a square and has only one code web 21 in the region of one edge 57.1. In the perspective view, two side surfaces 11, 12 can be seen. The square profile has different edge dimensions to one another because the width 18 is greater than the profile height 19.

Fig. 1b shows a second embodiment 10.2 of a key shaft whose edge profile 17 is also a square, but here are all corner portions 30.1 to 30.4 each provided with code strings 21 to 24, of which three 21, 22 and 23 can be seen. The formation of such code webs should be based on the FIGS. 2 and 3 be explained in more detail.

In Fig. 2 is, omitting the hatching, the cross section of a corner portion 30.1 shown, which results between two flat side surfaces 11 12 of the key shaft 10.2. As in Fig. 3 illustrated by dot hatching, in each case a recess 31, 32 are cut in both side surfaces 11, 12, which is formed angularly in the present case. The two recesses should therefore be referred to as Winkelausnehmungen 31, 32. The angular recesses 31. 32 have mutually facing angle leg 34, between which a web 21 remains. The web edges 25.1, 26.1 formed by the two angle legs 34 act as a scanning point pair 15, 16 of the key shaft 10.2. whose lateral position serves as a code. Therefore, the web 21 may be referred to as a "code bar". In the embodiment of FIGS. 2 and 3 are the Winkelausnehmungen 31. 32 formed at right angles.

The above-described keys 10.1, 10.2 are part of a locking device, which also includes a Fig. 7c recognizable lock cylinder 50 belongs. Fig. 7c shows a cross section through such a lock cylinder, which consists of a stationary cylinder housing 51 and a rotatably mounted therein cylinder core 52. The cylinder core 52 is provided with a keyway 53 in which Fig. 7c a third embodiment 10.3 of a key shaft according to the invention is inserted, which in connection with the Fig. 6 to 10 will be described in more detail. The cylinder core 52 has chambers in which spring-loaded tumblers 21 are movable transversely to the key axis 27. Springs 54 engage a nose 38 of the respective tumbler 41. The linear movement of the tumblers 41 is indicated by a double arrow 47.1 in FIG 7c If the key shaft 10.3 were not plugged in, the springs 54 would insert the tumblers into locking channels 55.1 or 55.2 and thereby fix the cylinder core 52 non-rotatably in the cylinder housing 51. In the illustrated embodiment of Fig. 7c the cylinder housing 51 has two more locking channels 56.1 and 56.2, which serve with the key pulled out for the entry of the ends of a further tumbler 42 at right angles to the tumbler 41 shown. This will be even closer in Fig. 6 and 7a described.

How such a tumbler 41 cooperates with the inserted key shaft 10.2 is in Fig. 4 shown in more detail. The aforementioned scanning point pair 15. 16 on both sides of the code web 21 is engaged by a pair of counter-scanning points 45, 46 of the tumbler 41, which form a corresponding counter-coding. This is done by a cutout 40 in the tumbler, in which the codesteg 21 engages when the key is inserted. The double-sided cut-out boundaries 43, 44 of FIG. 40 generate the two counter-scanning locations 45, 46.

As Fig. 5a can be seen, the tumbler 41 is plate-shaped and has a central opening 39, which is penetrated by the key shaft with inserted key. The cutout 40 adjoins this central opening 39 laterally and points in the direction of that already in connection with FIG Fig. 7c described lateral nose 38, on which the spring 54 engages.

Fig. 5b shows an alternative tumbler 41 'to the tumbler 41 of Fig. 5a , The difference is that at certain edges of the plate-shaped tumbler there are folds which produce different bevels 48.1 to 48.5 there. Thus bevels 48.1, 48.2 are initially provided at the two cut-out boundaries 43, 44 already described. These chamfers 48.1,48.2 provide when inserting the key in the keyway 53 of Fig. 7c for a better threading of the shaft.

If unauthorized persons want to determine which coding is present for a given lock cylinder, they are based on the position of the cutout delimitations 43, 44, which, as stated, in the tumbler 41 with a bevel 48.1. 48.2 are provided. In order to make the decryption by unauthorized persons more difficult, a "concealment" of the coding can be done by making even more folds at 48.3 to 48.5. Between the two cutout boundaries 43, 44 there is a connection 40.1, the edge of which may also be provided with a corresponding chamfer 48.3. Finally, in Fig. 5b the opening 39 provided in the transition to the cutout 40 with edges 49.2 and 49.3, the edges can also be provided with bevels 48.4 and 48.5.

Fig. 3 shows only an example of the location of a code 28.3 of the code bar 21. In the longitudinal direction of the key shaft 10.3 there are a plurality of further sampling points, which in Fig. 3 with 29.1 to 29.10 are designated. To vary the coding are of course in successive sections of the respective code webs 21 to 24, the two web edges opposite Fig. 3 added. This is how the in Fig. 8 by coarse dot hatching highlighted first code bar 21 in there key-shaft 10.3. The possible variation variety of the web flanks is in Fig. 2 illustrated by dashed lines 25.1 to 25.5 and 26.1 to 26.5.

In Fig. 2 five different codes 28.1 to 28.5 are provided, in which the position of the pair of adjacent land flank 25.1, 2G.1 to 25.5, 26.5 can vary. In this case, the associated code bar over the entire axial length of the key shaft 10.2 has a substantially constant ridge width 20. Only at large increments, which are adjacent to each other, you will train the code ridge in places with different ridge width. Already the Fig. 2 shows a possible extreme position of a scanning edge pair 28.1, where both associated web flanks 25.1, 26.1 beyond the local edge 57.1 in the local square profile 17 go out.

Similar extreme sample pairs are also available Fig. 8 in code bar 24 of the local key shaft 30.3. There are ten axially spaced Abstaststellen 29.1 to 29.10 provided. In Fig. 8 the edge 57.1 of the square profile 17 is replaced at those points by a dashed dotted line, where the edge 57.1 is exceeded by the code web 21. It can be seen that this happens, for example, at the sampling points 29.3 and 29.9.

How out Fig. 3 and 4 It can be seen, the mutually facing angle leg 34 of the arranged on both sides of the code web 21 Winkelausnehmungen perpendicular to the direction of movement 47.1 of the local tumbler 41. In addition, the two code webs 21 are arranged parallel to each other. It would of course be conceivable to arrange these angle legs 34 also inclined to the direction of movement 47.1. Then the web 21 would have a trapezoidal cross-section. Also, in Fig. 3 and 4 the angle leg 34 formed in a straight line. An alternative would be to make them curved and run convex or concave.

The other angle leg 35 of Fig. 3 proceeds according to Fig. 4 substantially parallel to the direction of movement 47.1 of the associated tumbler 41. The two angle legs 34, 35 connect to each other at a vertex angle, which is formed in the present case, as already mentioned, rectangular. These further angle leg 35 run, like Fig. 2 shows, in a common base plane 36. This base plane 36 intersects the corner region 30.1 obliquely. It would also be possible, at least in places, to arrange the angle legs 35, which are located on both sides of a code web and extend in the direction of movement of the tumbler 41, offset from one another in height.

In the present case, the variation of the position of the code pairs 28.1 to 28.5 of Fig. 2 at the aforementioned common base level 36. This base plane 36 is decisive for the entire axial length of the associated key shaft 10.1 to 10.3. Alternatively, it would be possible to arrange such a base plane at least in some axial sections of the code webs 41 to 54 at different heights.

In both embodiments 10.1, 10.2, the key shanks, as I said, a square profile 17. You could alternatively use a hexagonal or an octagonal profile as a cross section. The Fig. 6 to 10 show a key shaft 10.3. which has a special edge profile 17 ', because of the following special structure, the Fig. 9 can be seen, can be described as a "prism profile".

The prism profile 17 'has according to Fig. 9 four effective edges 57.1 to 57.4, which are used to create four code strings 21 to 24 according to Fig. 10 be used. The difference to the previous square profile of Fig. 1b to 4 consists essentially in that the second and the fourth side surface 12 ', 14' are angled roof-like. So arise between the edges 57.1, 57.4 on the one hand and 57.2. 57.3 on the other hand roof profile pieces 60 which each other on both sides of the associated angle crest 59.1 or 59.2 angled faces 58.1, 58.2 produce. Thus, an approximately non-uniform but fold-symmetrical "hexagonal profile" arises, the two angle vertices 59.1 and 59.2 of which are not used for coding. The two roof profile pieces 60 are formed in the two opposite side surfaces 12 ', 14' to each other in mirror image the same and have the advantage of increasing the Variation Variety in the Arrangement of Code Pair 58.1 to 58.5. what about the Fig. 2 and 9 make clear.

In Fig. 9 is, based on the edge 57.4, determine a slope profile of the surface 58.1 with a roof angle increase 61 of about 15 °. Drawing this, based on the local edge 57.1 in Fig. 2 through the dotted auxiliary line 62 at the same angle 61 in Fig. 2 a, it can be seen that before the first local code pair 28.1 one wins additional key cross section, where the variation of the coding could be continued. That applies, relative to in Fig. 9 shown further edge 57.1 also for the there to be executed coding that gains additional space in the sub-area 58.2 of the roof profile piece 60. Despite little broadening of the web cross-section through the flat roof profile pieces 60, relatively large partial surfaces 58.1, 58.2 for the continuation of the variation of the position of the code pairs are obtained.

How out Fig. 6 to 10 can be seen, in the third embodiment, 10.3 of the key shank according to the invention all four edges 57.1 to 57.4 provided with code strings 21 to 24, wherein opposite code webs as Fig. 10 can recognize particularly well, having an identical coding, namely 21, 23 on the one hand and 22, 24 on the other. This key shaft 10.3 forms a so-called "turning key", which in two mutually offset by 180 ° positions in the keyway 53 of the cylinder core 52 of Fig. 7c can be inserted. Based on their position in the cylinder core 52, there are two types of tumblers 41, 42, as the Fig. 6 to 7a demonstrate. One type 41 of tumblers, for example, scans the code pairs along the code web 22, while the other type 42 cooperates with the code web 23. In a turning position of the key, the respective opposite code webs 24 to 21 engage the two types 41 and 42 of the tumblers.

The two tumblers 41, 42 are, as Fig. 6 and 7b can be particularly well recognized, offset from each other by an angle corresponding to the angular offset of the associated code webs 22, 23. In the present case, it is a 90 ° angle. As illustrated by arrows 47.1 and 47.2, the directions of movement 47.1, 47.2 of these two types 41, 42 of the tumblers to each other at an angle 63, which is 90 ° here. The tumblers 41, 42 of the two varieties are otherwise arranged alternately in the cylinder core 52, whereby successive tumblers 41. 42 in the keyway 53 in mutually different directions 47.1, 47.2 are longitudinally movable.

As it is in Fig. 4 is illustrated by dot-dash lines, the one edge region 33 may be cut away, as illustrated at 37. As a result, space is gained, because the depth of the associated cutout 40 in the tumbler 41 can be correspondingly flatter. This does not affect the size of the relevant scanning points 15, 16 on both sides of the code web 21 from the key shaft 10.2. Instead of such a section 37, the edge could also be rounded in the corner region.

List of reference numbers:

10.1

first key shaft with a code ridge ( Fig. 1a )

10.2

second key shaft with four code links ( Fig. 1b to 4 )

10.3

third key shaft with prism profile ( Fig. 6 to 10 )

11

first page area of 10.2 ( Fig. 1a to 4 )

12

second page area of 10.2 ( Fig. 1a to 4 )

12 '

second page area of 10.3 ( Fig. 9 )

13

third page area of 10.2 ( Fig. 1a to 4 )

14

fourth page area of 10.2 ( FIGS. 1a to 4 )

14

fourth page area of 10.3 ( Fig. 9 )

15

first sampling point at 11 ( Fig. 3, 4 )

16

second sampling point at 11 ( Fig. 3, 4 )

17

Edge profile, square ( Fig. 1a to 4 )

17

Edge profile, prism profile of 10.3 ( Fig. 6 to 10 )

18

Width of 10.1 ( Fig. 1a )

19

Height of 10.1 ( Fig. 1a )

20

Bridge width ( Fig. 2 )

21

first code bar at 30. 1 ( Fig. 1b )

22

second code bar at 30.2 ( Fig. 1b )

23

third code bar at 30.3 ( Fig. 6 )

24

fourth code bar at 30.4 ( Fig. 1b )

25.1

first jetty flank of 21 at 28.1 ( Fig. 2 )

25.2

first jetty flank of 21 at 28.2 ( Fig. 2 )

25.3

first jetty flank of 21 at 28.3 ( Fig. 2 )

25.4

first jetty flank of 21 at 28.4 ( Fig. 2 )

25.5

first jetty flank of 21 at 28.5 ( Fig. 2 )

26.1

second land flank of 21 at 28.1 ( Fig. 2 )

26.2

second jetty flank of 21 - at 28.2 ( Fig. 2 )

26.3

second jetty flank of 21 at 28.3 ( Fig. 2 )

26.4

second jetty flank of 21 at 28.4 ( Fig. 2 )

26.5

second jetty flank of 21 at 28.5 ( Fig. 2 )

27

Key axis of 10.3 ( Fig. 6 . 7c . 8th )

28.1

first code pair, first code ( Fig. 2 )

28.2

second code pair, second code ( Fig. 2 )

28.3

third code pair, third code ( Fig. 2 )

28.4

fourth code pair, fourth code ( Fig. 2 )

28.5

fifth code pair, fifth code ( Fig. 2 )

29.1

first sampling point ( Fig. 8 )

29.2

second sampling point ( Fig. 8 )

29.3

third sampling point ( Fig. 8 )

29.4

fourth sampling point ( Fig. 8 )

29.5

fifth sampling point ( Fig. 8 )

29.6

sixth sampling point ( Fig. 8 )

29.7

seventh sampling point ( Fig. 8 )

29.8

eighth sampling point ( Fig. 8 )

29.9

ninth sampling point ( Fig. 8 )

29.10

tenth sampling point ( Fig. 8 )

30.1

first corner of 10.2 ( Fig. 1b, 2nd )

30.2

second corner of 10.2 ( Fig. 1b )

30.3

third corner of 10.2 ( Fig. 1b )

30.4

fourth corner of 10.2 ( Fig. 1b )

31

first angular recess in 11 ( Fig. 3 )

32

second angular recess in FIG. 12 ( Fig. 3 )

33

cut edge area at 21 ( Fig. 4 )

34

first angle leg of 31, 32 ( Fig. 3 )

35

second angle leg of 31, 32 ( Fig. 3 )

36

Base level of 35 ( Fig. 2 )

37

Cutting line for 33 ( Fig. 4 )

38

Nose of 41 ( Fig. 5a )

39

Breakthrough in 41 or 41 '( Fig. 5a )

40

Section in 41, 41 ', 42 ( Fig. 4 . 5a . 5b ; 7a, 7b )

41

Tumbler ( Fig. 4, 5 to 7b )

41

Tumbler ( Fig. 5b )

42

Tumbler ( Fig. 6 . 7b )

43

first cutout limit of 40 ( Fig. 4 )

44

second cutout limit of 40 ( Fig. 4 )

45

first counter sample of 41 at 40 ( Fig. 4 )

46

second counter sample of 41 at 40 ( Fig. 4 )

47.1

Movement direction of 41 ( Fig. 4 . 6 to 7c )

47.2

Direction of movement of 42 ( Fig. 6 . 7b )

48th

Bevel at 43 ( Fig. 5b )

48.2

Bevel at 44 ( Fig. 5b )

48.3

Chamfer at 29.1 ( Fig. 5b )

48.4

Chamfer at 29.3 ( Fig. 5b )

48.5

Chamfer at 29.2 ( Fig. 5b )

49.1

Connection between 43, 44 ( Fig. 5b )

49.2

first edge of 39 at 40 ( Fig. 5b )

49.3

second edge of 39 at 40 ( Fig. 5b )

50

Lock cylinder ( Fig. 7c )

51

stationary cylinder housing ( Fig. 7c )

52

Cylinder core in 51 ( Fig. 7c )

53

Key channel in 52 ( Fig. 7c )

54

Spring for 41 ( Fig. 7c )

55.1

first blocking channel for 41 ( Fig. 7c )

55.2

second blocking channel for 41 ( Fig. 7c )

56.1

first blocking channel for 42 ( Fig. 7c )

56.2

second blocking channel for 42 ( Fig. 7c )

57.1

first edge of 17; 17 '( Fig. 8 to 10 )

57.2

second edge of 17; 17 '( Fig. 8 to 10 )

57.3

third edge of 17, 17 '( Fig. 8 to 10 )

57.4

fourth edge of 17, 17 '( Fig. 6 to 10 )

58.1

first subarea of 60 ( Fig. 9 )

58.2

second subarea of 60 ( Fig. 9 )

5-9.1

first angle vertex of 60 ( Fig. 9 )

59.2

second angle vertex of 60 ( Fig. 9 )

60

Roof profile piece at 17 '( Fig. 9 )

61

Angle of roof rise of 60 ( Fig. 9 . 2 )

62

Guideline for 61 ( Fig. 2 )

63

Angle between 47.1, 47.2 ( Fig. 7b )

Claims (40)

1. Locking device with a lock cylinder (50),
   which consists of a fixed cylinder housing (51) and a cylinder core (52) rotationally mounted therein
   and with a key shaft (10.1, 10.2, 10.3) which has an edge profile (17), with it being possible to insert the key shaft (10.1, 10.2, 10.3) into a key channel (53) in the cylinder core (52), in order to arrange tumblers (41, 42), movable relative to it, on the transverse section of the cylinder core (52),
   with, by means of a profiled recess (31, 32) for each tumbler (41, 42) extending in the longitudinal direction of the key shaft (10.1, 10.2, 10.3), a pair of scanning points (15, 16) being arranged for coding the key (10.1, 10.2, 10.3),
   and a pair of opposing scanning points (45, 46), which form the basis of a corresponding opposing coding, being provided at each tumbler (41, 42),
   characterized in that
   the one (15) of the two scanning points (15, 16) of a first recess (31) is arranged in the one side surface (11) of the edge profile (17) of the key shaft (10.2), with the other scanning point(16) of a second recess (32) being located in the adjacent side surface (12) of the edge profile (17),
   a web remains in the corner area (30.1) of the edge profile (17) of the key shaft (10.1, 10.2, 10.3), which is arranged between both recesses (31, 32),
   the web functions as a code web (21 - 24) because opposite web flanks (25.3, 26.3) of the code web (21) create the scanning points pair (15, 16) of the key shaft (10.1, 10.2) that serves for coding,
   the tumblers (41, 42) are provided with a cutout (40) which, when used, grips the code web (21 - 24) around opposite web flanks (25.3, 26.3)
   and the side limits (43, 44) of the cutout (40) in the tumblers (41, 42) form the opposing scanning points (45, 46).
2. Locking device according to Claim 1, characterized in that to vary the position of the scanning points pair (15, 16) in successive sections of the code web (21 - 24), both web flanks (25.3, 26.3) are arranged laterally offset relative to each other on the code web (21 - 24).
3. Locking device according to Claim 2. characterized in that by the variation of the position of the scanning points pair (15, 16) at least one coding point (28.1) both web flanks (25.1 26.1) of the code web (21) projects beyond the prespecified edge (57.1) in the edge profile (17) of the key shaft (10.2) and there generate an extreme scanning points pair (28.1)
   and the code web (21) at this extreme scanning points pair (28.1) runs in only one (12) of the two side flanks (11, 12) of the edge profile (17) of the key shaft (10.2).
4. Locking device according to one of Claims 1 to 3, characterized in that the code web (21 - 24) has an essentially constant web width (20) over its complete axial length.
5. Locking device according to one of Claims 1 to 3, characterized in that the code web (21 - 24) has a different web width, at least in places.
6. Locking device in accordance with one of Claims 1 to 5, characterized in that several corner areas (30.1 - 30.4) of the edge profile (17) of the key (10.2) are provided with a code web (21 - 24).
7. Locking device according to Claim 6, characterized in that the complete edge areas (10.1 - 10.4) of the edge profile (17) of the key (10.2) function as a code web (21-24).
8. Locking device according to Claim 6 or 7, characterized in that the code webs (21 - 24) have coding different from each other in different edge areas (30.1 - 30.4).
9. Locking device according to Claim 6 or 7, characterized in that at least some code webs (22, 24-21, 23) have the same coding relative to each other.
10. Locking device according to one of Claims 1 to 5, characterized in that the edge profile (17') of the key shaft (10.3) has code webs (21, 23; 22, 24) with the same code at two opposite points.
11. Locking device according to Claim 10, characterized in that the code webs (21, 23, 22, 24) formed with the same code make the key shaft (10.3) a so-called reverse key which can be inserted in two positions opposite to each in the key channel (53) of the locking cylinder (50).
12. Locking device according to one of claims 1 to 11, characterized in that tumblers (41, 42), which are axially apart from each other on the cylinder core (52) of locking cylinder (50) grip on code webs (21 - 24) offset circumferentially relative to each other on the edge profile (17: 17') of the key shaft (10.1, 10.2; 10.3)
    and the particular directions of movement (47.1, 47.2) of these tumblers (41, 42),run at an angle (63) to each other, which corresponds to the angular position of the associated code web (21 - 24), when the key shaft (10.1, 10.2; 10.3) is inserted and withdrawn.
13. Locking device according to Claim 12, characterized in that successive tumblers (41, 42) can be moved alternately in the locking cylinder (50) in different directions (47.1, 47.2) in the cylinder core (52).
14. Locking device according to Claim 12 or 13, characterized in that the angle (63) between both directions of movement (47.1, 47.2) of adjacent tumblers (41, 42) is a 90° angle.
15. Locking device according to one of Claims 1 to 14, characterized in that, viewed in the cross section through the key shaft (10.2), each of the two recesses (31, 32) is formed as an angle in adjacent side surfaces (11, 12) of the edge profile (17) and form an angular recess
    and the legs of the angle (34), facing towards each other, of the two angular recesses (31, 32), form the scanning points pair (15, 16) which is used for coding.
16. Locking device according to Claim 15, characterized in that the angle leg (34), which is used for coding (15, 16), of both angular recesses (31, 32) extends transversely relative to the direction of movement (47.1) of the associated tumblers (41) in the cylinder core (52) of the locking cylinder (50).
17. Locking device according to Claim 16, characterized in that both angle legs (34, 35) run in an angular recess (31; 32) which is essentially vertical to the direction of movement (47.1) of the associated tumbler (41).
18. Locking device according to Claim 16 or 17, characterized in that at least one of the two angle legs runs essentially inclined relative to the direction of movement (47.1) of the associated tumbler (41).
19. Locking device according to one of Claims 15 to 18, characterized in that the angle leg (34) of the angular recess (31, 32) and/or the associated cutout limit (43, 44) in the tumbler (41) is formed so as to be essentially straight.
20. Locking device according to one of Claims 15 to 18, characterized in that the angle leg of the angular recess and/or the associated cutout limit in the tumbler is essentially curved.
21. Locking device according to Claim 20, characterized in that the curvature is convex.
22. Locking device according to Claim 20, characterized in that the curvature is concave.
23. Locking device according to one of Claims 15 to 22, characterized in that the other angle leg (35) of the recess (31, 32) extends essentially in the direction of movement (47.1) of the associated tumbler (41).
24. Locking device according to one of Claims 16 to 23, characterized in that both angle legs (34, 35) of a common angular recess (31, 32) form a crown angle which faces towards the axis of (27) of the key shaft (10.1, 10.2).
25. Locking device according to Claim 24, characterized in that the crown angle forms a right angle, i.e. a 90° angle.
26. Locking device according to one of Claims 15 to 25, characterized in that the analog angle legs (35), which are arranged in the associated angular recesses (31, 32) on both sides of the code web (21) and extend essentially in the direction of movement (47.1) of the associated tumblers (41), lie in a common basic plane (36)
    and the basic plane (36) obliquely intersects the corner area (30.1) of the edge profile (17) of the key shaft (10.2).
27. Locking device according to Claim 26, characterized in that the analog angle legs, arranged on both sides of the code web, are, at least in parts, offset in height relative to each other.
28. Locking device according to Claim 26, characterized in that the basic plane is the same along the complete axial length of the code web (21, 24).
29. Locking device according to Claim 26, characterized in that the basic plane is arranged at a different height, in at least some axial sections of the code web.
30. Locking device according to Claims 1 to 29, characterized in that the edge profile (17) of the key is rectangular.
31. Locking device according to Claim 30, characterized in that width (18) of the edge profile (17) has a different dimension than the height (19) of the edge profile (17).
32. Locking device according one of Claims 1 to 29, characterized in that the edge profile is a hexagon or octagon.
33. Locking device according to one of Claims 1 to 32, characterized in that, viewed in the profile cross section of the key shaft (10.3), the one side surface (12', 14') of the edge profile (17') is angled in the shape of a roof and forms a roof profile part (60) at this position,
    and, with the code variation, the recess (31; 32) in this roof profile (60) can extend over both part surfaces (58.1,58.2), angled relative to each other.
34. Locking device according to Claim 33, characterized in that the roof profile part (60), which creates a side surface (12', 14') in the edge profile (17'), has a flat part surface (58.1, 58.2).
35. Locking device according to Claim 33, characterized in that the part surfaces of the roof profile part have a convex or concave curvature and create an uneven side surface in the edge profile.
36. Locking device according to one of Claims 1 to 35, characterized in that the edge is rounded in the edge profile or in the corner area provided at that position.
37. Locking device according to one of Claims 1 to 35, characterized in that the edge (57.1) is cut away (33) in the edge profile (17) or in the corner area (30.1 - 30.4) provided at that position.
38. Locking device according to one of Claims 1 to 37, characterized in that the edges are bent down at the side limits (43, 44) in the cutout (40) of the tumblers (41'), i.e. has a chamfer (48.1, 48.2).
39. Locking device according to Claim 38, characterized in that the edge at the connection (49.1) between opposite limits (43, 44) in the tumbler cutout (40) has a chamfer (48.3).
40. Locking device according to Claim 38 or 39, characterized in that the plate-shaped tumbler (41') has central through opening (39) for the key shaft which abuts the cutout (40) which serves for opposing coding
    and at least one edge (49.2, 49.3) on the through opening (39) which extends from one of the two limit edges (43, 44) of the cutout (14) serving as opposing coding is bent, i.e. has a chamfer (48.4, 48.5).

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