Key for a cylinder lock.

The invention relates to a key for a cylinder lock which has longitudinal ribs and / or longitudinal grooves on the key flat sides, which run in the direction of insertion of the key into the keyway, with at least one profile groove with a length smaller than the length of the key shank within the at least one key flat side Key contour is arranged. Furthermore, the invention relates to a cylinder lock for this key.

The invention is based on keys and cylinder locks as disclosed by AT-PS 392 506, AT-PS 347 285, 340 802 and 371 879. All these known constructions, however, can be improved with all the given advantages with regard to the security of key copies and the number of available variations.

The known longitudinal profiling with longitudinal ribs and / or longitudinal grooves on the key flat sides can be reworked with relatively simple means. With regard to the number of variations, a large number of possible variations is desirable, especially since when developing locking systems with hierarchically designed locks and keys, the actually available options are often drastically reduced, even if there is theoretically a high number of variations.

In order to increase the possibilities for variation mentioned above, it is proposed, for example, by AT-PSs 363.337 and 389 559, to provide curved profile grooves or such grooves at an angle to one another. For the same end purpose, it has become known from FR-PS 85 16 592 and DE-OS 33 14 511 to arrange profile grooves that can be scanned from the side and that can be curved or straight. None of these proposals can meet today's high requirements with regard to the number of available variations and a duplicate key security.

In contrast, the present invention has the task of overcoming the above disadvantages and providing keys and locks which make it difficult to imitate keys improperly, offer a large number of possible variations and yet from a structural point of view and with regard to wear and tear meet the required quality standards.

The key according to the invention is characterized in that the additional profile groove is provided at an angle not equal to 90 ° to the direction of insertion of the key and that groups of profiles are provided at several scanning points on the flat side of the key at an angle to the direction of insertion of the key.

According to a further feature of the invention, the longitudinal grooves and profile grooves are provided on both sides of the key. Furthermore, profile grooves can be provided on the key according to the invention which have different angular positions with respect to the direction of insertion of the key.

The associated cylinder lock is characterized according to the invention in that scanning elements are provided in the form of plates with scanning ends, which extend along the direction of insertion of the key and obliquely to this direction at the same angles of the profile grooves of the key, whereby scanning elements scan the flat sides of the key with their scanning ends and locking recesses of the cylinder housing lie opposite with locking extensions in the zero position of the cylinder core and come to rest within the cylinder core when the cylinder core is rotated with the correct key and remain in the locking recess if the key is incorrect, thus preventing rotation. According to a further characteristic of the invention, the plate is resiliently biased in the direction of the locking recess of the cylinder housing. Finally, according to the invention, the plate has a tab for engaging a compression spring, which is supported on the cylinder core.

Further features of the invention can be found in the description and the drawings.

The invention is explained in more detail below with the aid of schematic drawings and a few exemplary embodiments. FIG. 1 shows the side view of a key according to the invention. FIG. 2 is the cross section through a known profiling scheme and FIG. 3 is a section along the line III-III in FIG. Figures 4 and 5 are views of the cylinder core from the side and from above. FIG. 6 is a plan view of a lock detail and FIG. 7 is a view in the direction of arrow VII in FIG. FIGS. 8a, 8b and 8c are a section along the line VIII-VIII in FIG. 6 for various exemplary embodiments of this construction element. FIG. 9 illustrates a section through a cylinder lock along the line IX-IX in FIG. 4, the cylinder housing being additionally arranged

AT 409 995 B is. FIG. 10 is the side view of a further exemplary embodiment of a key according to the invention and FIG. 11 is a section along the line XI-XI in FIG. FIGS. 12 and 13 are sections along the line XII-XII in FIG. 10. FIG. 14 shows four variants a) to d) of the profile groove in the key. 15 is a section through a further embodiment variant and FIGS. 16 to 19 show a lock element in cracks associated with one another. Fig.20 is the side view of an embodiment.

1 shows schematically a key according to the invention, wherein the variation elements shown can also represent an exemplary embodiment for a practical implementation. As usual, the flat key comprises the key head 1 and the key shaft 2, which can be pushed essentially entirely in the direction of insertion 3 into the key channel of an associated cylinder lock. The key shaft 2 comprises the key back 4, the key tip 5 and the key face 6. Tumbler notches 7 starting from the key face are shown in dashed lines, which can interact in a known manner with tumbler pins of the cylinder lock.

On the flat side of the key, two key grooves 8 and 11 are provided as part of the longitudinal key profile, which extend in the direction of the key insertion direction 3 and thus run parallel to the key back 4.

Furthermore, additional profile grooves 18, 19 and 20 are provided, the length of which is smaller than the length of the key shaft 2 and which are arranged at an angle, that is to say at an angle not equal to 90 ° to the insertion direction 3 of the key. A profile groove 21 inclined differently, for example, is shown in dashed lines. At one and the same sampling point of the key, for example two such intersecting profile grooves can be provided in order to be able to scan the same key within a locking system by different scanning elements of different locks. As you can see, all of these last-mentioned profile grooves lie within the key contour, namely between the back of the key 4 and the chest of the key 6, without cutting the back or chest.

The line 22 is the profile groove symmetry of each profile groove. According to the design of the associated scanning element in the lock, the profile groove actually formed on the key can be arranged either above or below or on both sides of these profile groove symmetries 22. In Figure 1, the profile grooves are each formed on both sides of the profile groove symmetry, which is only an example, as will be explained in more detail later.

In Fig.1 only one flat side of the key is shown. The other flat side of the key of the same key can also have longitudinal profile grooves or ribs and the profile grooves (18, 19 or 20) in an analogous manner, whereby the angular positions of the grooves can be the same or opposite or in a different position.

The formation of the longitudinal profile of the key and, analogously, of the key channel in the lock, is preferably carried out according to a profile system that is described in AT-PSs 340 802 and 371 879. This profile system is explained in more detail below with reference to FIG.

The profile system is based on a theoretical basic profile 23, which can be thought of as composed of zigzag-shaped rhomboid-like elements 24 arranged in a row. The spaces existing between the adjacent elements 24 up to the enveloping planes 25 can either be designed as grooves or key material as a rib to achieve the necessary profiling and variety of variations. The longitudinal profile elements are denoted by the reference numerals 8 to 17, with the reference numerals 13 and 14 showing two adjacent ribs with hatched lines. It is noteworthy that with this type of profiling the ribs (for example 13 and / or 14) remain within the enveloping planes 25. If a key has provided all the ribs, then the key has a smooth surface, which in practice should be avoided.

In the manufacture of such keys, of course, a key blank is assumed which corresponds to the enveloping planes 25 and by removing or leaving key material at points 8 to 17, either grooves or ribs are provided.

Another system can be used to develop hierarchies in locking systems. As described and characterized in AT-PS 371 879, the key and the associated key channel can preferably be one within a lock3

AT 409 995 B system invariable basic profile and a variable profile, which together make up the overall profile, wherein both the basic profile and the variable profile are provided distributed over the key area effective for locking or unlocking. In this case, the profiles are preferably nested in one another, so that at least one profile element of the basic profile is arranged between two profile elements of the variable profile on each side of the key.

This profile system comes into play when developing locking systems, especially when a large number of hierarchical levels have to be taken into account. When working out the individual profiles of this shooting system, the profile elements 8, 10 and 15 on the key are always provided as ribs, so that the basic profile of this system consists of the theoretical basic profile 23 and the ribs 8, 10 and 15 attached to it. All other profile elements 9, 11, 12, 13, 14, 16 and 17 are available for the variations in order to create the necessary locking differences.

With this profile system, it is particularly advantageous that the basic profile of the entire system cannot be identified on a single key, so that it is more difficult to improperly imitate a key in this system. There is also the advantage that the higher the hierarchy, the more complicated the keys are. This also makes it difficult to imitate the higher-level keys of a system.

FIG. 3 shows the cross section of a key (analogously also the cross section of an associated key channel), the profile systematics of which is shown schematically according to that of FIG. The figure is a section along the line III-III in Figure 1 and thus cuts through the additional profile groove 18, which is inclined to the longitudinal profile grooves of the key. Identical elements are denoted by the same reference symbols from FIGS. 1 and 2.

As you can see, the profile elements 12, 13 and 14 are provided as ribs. All other profile elements and among them the profile elements 9 and 10 are present as grooves that extend over the entire length of the key shaft.

The cross section of the profile groove 18, which extends obliquely over the key, is trough-shaped, the profile groove in this embodiment being arranged on both sides of the profile groove symmetry 22.

In order to create variations, it is also possible to provide the profile groove only above the profile groove symmetry or below this symmetry and to have it scanned by appropriately designed scanning elements.

As can be seen in FIG. 1, the profile groove 18 cuts both into the longitudinal groove 8 above it and into the longitudinal groove 11 below it.

4 and 5 show a view from the side and from above a cylinder core, as it is usually arranged in the cylinder housing of a lock and which can be used in connection with the keys described above. The cylinder core 26 accommodates the continuous key channel 27 in it. With the core collar is referred to, which points outside of the associated housing to the outside. The cylinder core end 29 lies in the interior of the lock and connects the rotary movement of the cylinder core 26 in a manner not shown with a coupling on a locking nose which in turn actuates the door lock. All of these elements are state of the art.

The holes for the pin tumblers are designated by 30.

The core recesses 31, which narrow somewhat towards the key channel 27 in the region 32, are arranged approximately perpendicular to the key channel 27. The upwardly extending recesses 33 result in practice when using end mills for the formation of the core recesses 31. If other tools are used, this recess 33 can also be omitted.

In the core recesses 31, scanning elements in the form of platelets 34 are provided, as shown in FIG. 6 and in FIGS. 7 and 8. Each plate has a scanning end 35 on the key-side end and a locking projection 36 on the other side.

The scanning end 35 is designed as an inclined projection in the direction of the arrow VII and as shown in FIG. immerse

AT 409 995 B can. This embodiment thus combines the manufacturing advantage of the axially parallel arranged core recesses 31 with the oblique scanning of the oblique profile grooves.

In FIG. 7, a profile rib symmetry 37 is drawn in, and with respect to this profile rib symmetry, three different designs of the scanning end are possible, as shown in FIGS. 8a to 8c. The scanning end 35 is provided either above or below or on both sides of this profile rib symmetry 37. The illustration in FIG. 8 shows only the cut surface along the line VIII-VIII in FIG. 7 and not the other edges of this body. The locking extension 36 has a round, wedge-shaped course and engages in a locking recess 38 of the cylinder housing 39 in the O-position of the cylinder core according to FIG. As can easily be seen from this FIG. 9, the key 40 can be pushed unhindered into the key channel 27, since the plate 34 has enough space to move into the latching recess 38. When the cylinder core 26 is rotated, the locking projection 36 runs up against the walls of the latching recess 38 and the plate 34 is pushed inwards in the direction of the key channel 27. If the key is correctly designed and has the correct profile groove 18, the scanning end 35 fits into the profile groove 18 and the plate 34 lies entirely within the cylinder core 26, so that the cylinder core can be rotated. If the key is incorrect, the scanning end 35 hits the key material and the locking projection 36 does not release the latching recess 38, so that the cylinder core is prevented from rotating.

With regard to the number of variations, it can be stated that each of the obliquely arranged profile grooves creates four additional possibilities for variation. In Figure 8 three of these possibilities are shown and the fourth variation consists in the fact that the plate is provided without a scanning end 35, so that no inclined profile groove is assigned to the key. The plate 34 prevents the housing pin 41 from snapping into the core recess 31 when this is rotated past the housing pin 41. The core pin is labeled 47. The number of variations with regard to the longitudinal profile elements are not influenced by the arrangement of the inclined profile grooves. The variations of the inclined profile grooves are thus fully effective. If the inclined profile grooves are only provided on one side of the key, this increases the number of profile elements available for variation by six. Five longitudinal profile elements on each key side result in 1,024 possible variations. Three additional inclined profile grooves result in around 64,000 possible variations with the longitudinal profile elements.

Various modifications of the illustrated embodiments are possible within the scope of the invention. The inclined profile grooves on the key can also be provided crossed one above the other, with one of the two grooves being scanned in the core. In this way, the same key can be locked in different cores.

The profile grooves 18, 19, 20 are preferably guided at most up to the center line of the key profile cross-section or somewhat shallower in order to avoid openings in the key wall.

Fig. 10 shows a side view of another embodiment of the key according to the invention. The inclined profile grooves 18, 19, 20 are, compared to the embodiment according to Figure 1, moved more towards the tip of the key and partially overlap each other. The profile grooves 18 and 20 are made narrower, whereas the profile groove 19 has twice the width (see also FIG. 14). Fig. 11 is a section along the line XI-XI and of course. The cut edges with the longitudinal profile grooves 8, 11 are not shown in this sectional illustration in order to keep the illustration simpler.

FIGS. 12, 13 are representations analogous to FIGS. 2 and 3. All profile options and the possible cross-sectional arms of the inclined profile groove 42, 43 on the left and right side of the key are shown in each case. It is possible to provide both profile grooves 42, 43 on both sides of a key. In order to scan such a key at all scanning points, the corresponding plates must of course be provided on both sides of the key channel.

The individual longitudinal profile elements are drawn in in FIGS. 12, 13 with dimensions that are advantageous in practice. With 44 one of the possible ribs is shown hatched. At 45 there are two ribs arranged next to one another, which fill the key up to the envelope 46 in this area.

14 shows schematically the four possible variations a) to d) for the cross section of the

AT 409 995 B inclined profile grooves 18, 19 or 20. The profile groove designated by 19 in FIG. 10 corresponds to variant d). The profile grooves 18 and 20 also shown in FIG. 10 correspond to either variant a) or variant d). With c) that variant is shown in which no inclined profile groove is provided and the plate 34 accordingly must not have a scanning end 35 either.

The angle between the profile grooves 18, 19, 20 and the direction of insertion of the key can be selected as desired and is approximately 15 ° in the embodiment according to FIG. 10.

Another exemplary embodiment for the key according to the invention and the associated lock are shown in FIGS. 15 to 20.

15 shows a view of the end face of the cylinder housing 39 with the cut cylinder core 26. A key 52 is inserted into the keyway and presses the core pin 47 downward in the release position. The core pin 47 is guided in the core pin bore 51.

In this exemplary embodiment, the plate 48 is pretensioned by a spring 50 in the direction of the latching recess 38. The plate 48 has a downwardly projecting tab 53 on which the compression spring 50 engages. A recess 49 is provided in the housing for guiding the tab 53 and receiving the spring 50.

In the variant shown in Fig. 15, the plate 48 is with its scanning end 54 on the key material so that the lock cannot be unlocked. Locking is only possible when a correct key is inserted which has the profile groove corresponding to the scanning end 54.

FIGS. 16 to 19 show a variant of the plate 48 in cracks assigned to one another. FIG. 17 is a section along the line XVII-XVII in FIG.

The scanning end 54 of the plate 48 has an inclined profile which is arranged complementary to a corresponding profile of inclined profile grooves of the associated key. For example only, two grooves 55, 56 and three ribs 57, 58 and 59 are provided. This inclined profiling can preferably be done in the same or a similar way as the longitudinal grooves and longitudinal ribs on the flat sides of the key, whereby, as described above, both the basic profile and the variable profile are provided distributed over the key area effective for locking or unlocking and these profiles are nested in one another . The locking extension is denoted by 60 in these figures.

FIG. 20 is a side view of an exemplary embodiment for a key 52, as it can be used in connection with the lock according to FIGS. 15 to 19. FIG. On the flat side of the key, in addition to the longitudinal grooves and longitudinal ribs, inclined profile groove groups 61, 62, 63 are provided at three points, which are scanned by appropriately designed plates 48 of the lock.

The profile grooves here assume an angle of approximately 45 ° with respect to the direction in which the key is inserted, which is only valid as an example.