Locking cylinder

Abstract

The invention relates to a locking cylinder, comprising a cylinder core with a key channel for a key. A blocking device is also provided, which has an interrogation pin preloaded in the direction of the key channel and has a blocking pin which is preloaded in the blocking position, in which position the blocking pin prevents a rotation of the cylinder core into the open position. The interrogation pin can be pushed by the key into an interrogation position, wherein the interrogation pin and / or the blocking pin has a permanent magnet on an end portion facing the respective other pin, said permanent magnet being designed, when the interrogation pin is pushed into the interrogation position, to hold the blocking pin in a release position in which the blocking pin releases the cylinder core for the open position.

Description

[0001] Schließzylinder

[0002] The invention relates to a locking cylinder comprising a cylinder housing with a core receiving section and a cylinder core that is rotatably mounted in the core receiving section about a cylinder rotation axis between a closed position and an open position. The cylinder core has a key channel extending along the cylinder rotation axis, into which a corresponding key can be inserted through a key insertion opening along a key insertion direction. The key channel has an elongated cross-section with two opposing key channel broad sides and two opposing key channel narrow sides.In addition, the locking cylinder comprises at least one tumbler which is designed to block the cylinder core, which is in the closed position, against rotation into the open position when the associated key is not inserted into the keyway, wherein the at least one tumbler can be sorted into a release configuration by inserting the associated key, in which the at least one tumbler releases the cylinder core for rotation relative to the cylinder housing.

[0003] Such locking cylinders can be used in a variety of applications and, for example, in door locks to optionally release a door for opening or to lock the door against opening. For this purpose, the rotatable cylinder core can be connected, in particular, directly or indirectly to a locking element, so that the locking element can be driven by rotating the cylinder core. When the cylinder core is in the closed position, such a locking element can, for example, engage in a recess provided for this purpose on a door frame and thereby lock the door against movement relative to the door frame, whereas the locking element can be moved out of the recess by rotating the cylinder core into the open position in order to release the door for opening.Similarly, locking cylinders can also be used in locks for locking windows or window handles, as well as in padlocks, for example, where, by rotating the cylinder core between the closed and open positions, a shackle can be locked relative to the lock body of a padlock, or can be released for movement relative to the lock body. To secure the locking cylinder against unauthorized operation, one or more tumblers can be provided that can block the cylinder core against rotation relative to the cylinder housing in the closed position and / or against rotation into the open position when the key is not inserted into the keyway.For example, the at least one tumbler can be designed as a pin holder, which can have a housing pin preloaded in the direction of the cylinder core by a tumbler spring and arranged in the cylinder housing, as well as a core pin arranged in the cylinder core, wherein the housing pin can protrude into the cylinder core when the associated key is not inserted into the keyway, in order to thereby prevent rotation of the cylinder core relative to the cylinder housing. By inserting the associated key, which is designed to sort the at least one tumbler into the release configuration, the core pin and, above it, the housing pin can be displaced against the preload of the spring, wherein the core pin can be moved, in particular, just as far as an outer side of the cylinder core by the correct key.Therefore, after the associated key has been fully inserted into the keyway, the housing pin can be positioned outside the cylinder core, releasing the cylinder core for rotation relative to the cylinder housing. In particular, locking cylinders can have multiple such tumblers, and the associated key can be configured to sort all of the tumblers into the release configuration to release the cylinder core for rotation into the open position.

[0004] In principle, such locking cylinders can be designed to be robust and reliable, so that the use of locking cylinders can achieve a high level of security against break-in attempts. However, the coding options of conventional locking cylinders are often determined by the number and design of the tumblers, so the cylinder cores of such locking cylinders can be moved into the open position by any key suitable for sorting the tumbler(s) into the release configuration.In order to further increase the security of locking cylinders against unauthorized activation attempts and the forgery security of the assigned key, there is a need for locking cylinders that offer coding options that go beyond the respective locking mechanisms, so that further properties of the assigned key can be queried and thus forgery of the assigned key can be made more difficult.

[0005] Therefore, it is an object of the invention to provide a locking cylinder of the type described with expanded coding options in order to achieve increased security against forgery of the associated key. This object is achieved by a locking cylinder having the features of claim 1.

[0006] This locking cylinder has a locking device comprising a query pin and a locking pin. The query pin is preloaded toward the keyway and engages the keyway (at least when the key is not fully inserted into the keyway). The locking pin is aligned with the query pin. The locking pin is preloaded outwardly into a locked position relative to the cylinder rotation axis and is designed to prevent and / or block rotation of the cylinder core into the open position in the locked position.

[0007] The interrogation pin can also be pushed into an interrogation position by fully inserting the associated key into the keyway, in particular against its preload. Furthermore, the interrogation pin has a permanent magnet at an end portion facing the locking pin and / or the locking pin has a permanent magnet at an end portion facing the interrogation pin, wherein the permanent magnet is designed to hold the locking pin, when the interrogation pin is pushed into the interrogation position, against the preload of the locking pin, in a release position in which the locking pin releases the cylinder core for rotation into the open position.

[0008] By having the locking cylinder with such a locking device with a locking pin that prevents rotation of the cylinder core into the open position in the locked position, an additional level of security and coding of the locking cylinder can be achieved compared to coding the cylinder core exclusively by the at least one tumbler. In particular, a key by means of which the cylinder core can be actuated and moved from the closed position to the open position must not only sort the at least one tumbler into the release configuration, but must also interact with the interrogation pin in such a way that the interrogation pin can be moved into the interrogation position by the key, thereby enabling the locking pin to be held in the release position and the cylinder core to be released.This can be achieved, in particular, by forming a coding protrusion on the key, through which the interrogation pin can be forced back into the interrogation position against its preload when the key is fully inserted into the keyway. This will be explained in more detail below.

[0009] Since in some embodiments the query position can be precisely defined and must be achieved in order to be able to hold the locking pin in the release position, various coding options for coding the locking cylinder that go beyond the tumblers can be created, for example by means of an engagement depth of the query pin in the key channel, a positioning of the query pin and thus a location of the engagement in the key channel, respective lengths of the query pin and the locking pin, strengths of the respective pretensions of the query pin and the locking pin and / or a strength of the permanent magnet(s).In particular, such coding of the locking cylinder requires that a coding protrusion on the key be formed in the correct position and at the correct height in order to be able to move the interrogation pin into the interrogation position, so that the provision of a locking device can ultimately make it more difficult to forge the assigned key.

[0010] Nevertheless, these codings can be implemented with comparatively little effort in terms of manufacturing the locking cylinder and the associated key, since only two additional pins – the query pin and the locking pin – need to be inserted into the cylinder core and pre-tensioned accordingly, whereas only the additional coding protrusion needs to be attached to the key. The permanent magnet can also be easily pressed onto the respective end section, for example.The arrangement of the permanent magnet on the query pin and / or the locking pin enables greater durability and reliability compared to an arrangement of a magnet on a key, since the locking pin and the query pin are only moved when the locking cylinder is actuated and - unlike a magnet arranged on a key - are not exposed to any friction during transport of the key, for example, which could lead to the permanent magnet becoming loose.

[0011] In order to be able to hold the locking pin in the release position, the permanent magnet can in particular be designed to exert an attractive force on the respective other of the interrogation pin or locking pin on which the permanent magnet is not arranged. Therefore, at least that of the locking pin and the interrogation pin which does not have the permanent magnet can have a magnetic material on an end section facing the permanent magnet and / or be formed from a magnetic material. In particular, the respective pin can be formed entirely from a magnetic material. Furthermore, in embodiments in which both the interrogation pin and the locking pin have a respective permanent magnet, the permanent magnets can be oppositely polarized in order to achieve an attraction between the locking pin and the interrogation pin and thereby to be able to hold the locking pin in the release position.

[0012] In particular, it can be provided that the interrogation pin and the locking pin make mechanical contact in the release position when the interrogation pin is positioned in the interrogation position and the locking pin is positioned in the release position. Therefore, the locking pin can, for example, bear directly against the interrogation pin in the release position, provided the interrogation pin is positioned in the interrogation position. Alternatively, however, it can also be provided in principle that the permanent magnet is designed to hold the locking pin in the release position against the preload of the locking pin when the interrogation pin is positioned in the interrogation position, without the interrogation pin and the locking pin making direct contact.

[0013] Furthermore, the strength of the permanent magnet can be selected such that the permanent magnet can pull the locking pin from the locked position into the release position immediately upon positioning the interrogation pin in the interrogation position and can then hold it in the release position. However, it can also be provided that the locking pin must first be moved in another way towards the interrogation pin positioned in the interrogation position and, for example, into the release position in order to come into operative contact with the permanent magnet and to be able to be held in the release position by the permanent magnet. In such embodiments, the strength of the permanent magnet must therefore only be sufficient to compensate for a force acting on the locking pin in the release position in the direction of the locked position, without, however, having to overcome the preload of the locking pin and pull the locking pin into the release position.Such embodiments and possibilities for moving the locking pin onto the interrogation pin are explained in more detail below.

[0014] Furthermore, the locking pin can generally be arranged in the cylinder core, but can be designed to protrude from the cylinder core into the cylinder housing in the locked position, thereby blocking the cylinder core against rotation relative to the cylinder housing into the open position. However, it can be provided that the cylinder core can be rotated through a predetermined angle of rotation even when the interrogation pin is not positioned in the interrogation position and / or when the locking pin is not positioned in the release position, before the locking pin blocks further rotation toward the open position. This will also be explained in more detail below.

[0015] In some embodiments, the locking cylinder can have multiple tumblers, wherein these tumblers can be designed, in particular, as pin tumblers. Such pin tumblers can, for example, have tumbler springs and housing pins arranged in the cylinder housing, which are pretensioned toward the cylinder core by the tumbler springs. Furthermore, the pin tumblers can comprise core pins arranged in the cylinder core. When the key is not inserted into the keyway, the housing pins can also protrude from the cylinder housing and into the cylinder core, thereby blocking the cylinder core from rotating relative to the cylinder housing.However, the associated key may have sorting structures, in particular sorting elevations and / or sorting depressions, so that the core pins are displaced outward when the associated key is inserted into the keyway, and the housing pins can thereby be moved out of the cylinder core to release the cylinder core for rotation. Such pin tumblers are generally known to those skilled in the art.

[0016] Furthermore, in some embodiments it can be provided in particular that the tumblers and / or the interrogation pin protrude into the key channel on a key channel broad side, so that accordingly in particular the mentioned sorting structures and / or a coding elevation cooperating with the interrogation pin can be formed on a key broad side of the associated key.

[0017] The locking cylinder can, in particular, be designed as a profile cylinder in accordance with DIN 18252. In such a profile cylinder, the cylinder housing can have a core receiving section for receiving the cylinder core and a flange section projecting radially therefrom with respect to a rotational axis of the cylinder core, in which the aforementioned housing pins and tumbler springs can be arranged. As an alternative to a profile cylinder, however, it can also be provided, for example, that the locking cylinder is designed as a round cylinder or oval cylinder and has a correspondingly shaped cylinder housing.

[0018] In principle, within the scope of the present disclosure, a radial and an axial direction can refer to the cylinder rotation axis and a longitudinal axis of the associated key, unless another reference axis is explicitly stated. Furthermore, the longitudinal axis of the associated key can, in particular, correspond to the cylinder rotation axis when the key is inserted. Furthermore, the key can, in principle, be inserted into the key channel along or parallel to the cylinder rotation axis, so that the cylinder rotation axis can define the key insertion direction. Furthermore, the key can be inserted into the key channel along its longitudinal axis.

[0019] Further embodiments are explained in the dependent claims, the description and the figures.

[0020] In some embodiments, the permanent magnet can be arranged at an end section of the interrogation pin. In some embodiments, the locking pin can engage in a locking receptacle formed on the cylinder housing when the cylinder core is in the closed position. In particular, in such embodiments, the locking pin can block rotation of the cylinder core from the closed position by engaging in the locking receptacle when the interrogation pin is not arranged in the interrogation position. However, in some embodiments it can also be provided that the locking pin can be guided out of the locking receptacle upon rotation of the cylinder core by means of a interrogation bevel adjoining the locking receptacle, in order to block rotation of the cylinder core towards the open position only after rotation by a predetermined angle of rotation if the interrogation pin is not arranged in the interrogation position.This will also be explained in more detail below.

[0021] In some embodiments, the interrogation pin can engage into the keyway at one of the keyway broad sides.

[0022] Furthermore, in some embodiments, the interrogation pin can be more strongly preloaded than the locking pin. In particular, such a stronger preload of the interrogation pin compared to the preload of the locking pin can ensure that the interrogation pin can hold the locking pin in the release position and cannot be pulled outwards by the locking pin beyond the interrogation position due to its preload. In particular, a force acting on the interrogation pin in the direction of the key channel due to the preload when the interrogation pin is positioned in the interrogation position can therefore be greater than an outward force acting on the locking pin due to the preload of the locking pin when the locking pin is positioned in the release position.

[0023] Alternatively or additionally, in some embodiments, the interrogation pin can also rest against a retaining edge of the cylinder core in the interrogation position, which blocks outward movement of the interrogation pin. This can also prevent the interrogation pin from being pulled outward by the locking pin and the locking pin from engaging the cylinder housing despite the interrogation pin being positioned in the interrogation position.

[0024] Furthermore, in some embodiments, the strength of the permanent magnet can be greater than an outward force acting on the locking pin in the release position, but less than the sum of the outward force acting on the locking pin in the release position and an inward force acting on the interrogation pin in the interrogation position in the direction of the keyway. In particular, the inward force acting on the interrogation pin in the interrogation position due to its pretension can be compensated for by a coding elevation formed on the associated key, which can block movement of the interrogation pin in the direction of the keyway. Since the strength of the permanent magnet can exceed the outward force acting on the locking pin, the locking pin can therefore be held in the release position when the associated key is inserted.However, if the key is removed again, the force acting on the interrogation pin is no longer compensated and the added force of the opposing preloads exceeds the force of the permanent magnet, so that the locking pin can return to the locked position in order to secure the cylinder core against unauthorized movement into the open position.

[0025] In some embodiments, the cylinder housing can have a query gate. By rotating the cylinder core from the closed position into a query rotational position, the locking pin can be guided along the query gate and thereby moved toward the query pin and, in particular, pushed into the release position. Furthermore, the locking pin and / or the query pin can be brought into operative contact with the permanent magnet upon reaching the query rotational position when the query pin is in the query position. In other words, a magnetic force connection can be brought about between the locking pin and the query pin when the key is fully inserted into the keyway.

[0026] In particular, the locking pin can be moved towards the interrogation pin by rotating the cylinder core into the interrogation rotational position, for which purpose the interrogation gate can, for example, have an interrogation slope that rises in the direction of rotation of the cylinder core towards the keyway, along which slope the locking pin can be guided during rotation. If the interrogation pin is in the interrogation position, the permanent magnet can further exert a sufficient force of attraction on the locking pin and the interrogation pin in order to be able to hold the locking pin in the release position when the interrogation rotational position is reached. In particular, the locking pin can be moved into the release position by rotating the cylinder core and / or brought into mechanical contact with the interrogation pin in the interrogation position in order to be able to be held on the interrogation pin and in the release position.

[0027] In principle, however, such a rotation can also be possible, especially when the interrogation pin is not in the interrogation position and thus no key designed to interact with the interrogation pin has been inserted into the keyway. In particular, a rotation of the cylinder core into the interrogation rotation position can thus be carried out by a key which can sort the at least one tumbler into the release configuration, but which does not have the additional coding for moving the interrogation pin into the interrogation position. In this case, no active contact can be established with the permanent magnet, so that the locking pin can block further rotation of the cylinder core and in particular a rotation into the open position.

[0028] In general, bringing the locking pin and / or the interrogation pin into operative contact with the permanent magnet may mean establishing such a small distance between the locking pin and the interrogation pin that the permanent magnet can exert a sufficient attractive force to hold the locking pin in the release position and in particular in mechanical contact with the interrogation pin.

[0029] In some embodiments, the interrogation gate can have an interrogation slope along which the locking pin can be guided during rotation of the cylinder core from the closed position to the interrogation position. In particular, such an interrogation slope can deflect the rotational movement of the cylinder core in order to convert the rotational movement into a movement of the locking pin counter to the preload on the interrogation pin. Therefore, the interrogation slope can increase, particularly along the direction of rotation of the cylinder core during rotation from the closed position to the open position, in the direction of the keyway and thus in the direction of the interrogation pin.

[0030] In some embodiments, the interrogation gate can have an interrogation section extending at least to an outer side of the cylinder core, wherein the locking pin can bear against the interrogation section in the interrogation rotational position.

[0031] In particular, the locking pin can thus be brought into a position by rotating the cylinder core into the query rotational position in which the locking pin no longer engages with the cylinder housing. If the locking pin is thus held in the position reached in the query rotational position, in particular the release position, the locking pin no longer engages with the cylinder housing, so that further rotation of the cylinder core, in particular into the open position, is possible. By means of such a query section, it can thus be achieved that the locking pin only has to be held in the assumed position after being rotated into the query rotational position and, to a certain extent, has to be taken over by the query pin, without having to be moved against the preload by a magnetic force exerted by the permanent magnet.

[0032] In some embodiments, the cylinder core can be rotatable from the interrogation rotational position toward the open position into a blocking rotational position when the interrogation pin is not in the interrogation position. Furthermore, when the interrogation pin is not in the interrogation position, the locking pin can be configured to engage a blocking receptacle of the interrogation gate due to its preload when the cylinder core is rotated from the interrogation rotational position into the blocking rotational position. The blocking receptacle can have a blocking stop for the locking pin, against which the locking pin engaging in the blocking receptacle strikes upon reaching the blocking rotational position.

[0033] In particular, the locking pin can return to the locked position in the blocking rotational position if the interrogation pin is not positioned in the interrogation position and the locking pin was therefore not taken over while passing the interrogation rotational position to be held in the release position. Such an interrogation gate thus makes it possible to first move the locking pin toward the interrogation pin by rotating the cylinder core into the interrogation rotational position in order to hold the locking pin in the release position—provided the interrogation pin is positioned in the interrogation position—and to release the cylinder core for rotation into the open position.If, however, the interrogation pin is not in the interrogation position because no key designed to interact with the interrogation pin has been inserted into the keyway, the locking pin is moved outwards again due to its pretension when rotating from the interrogation rotational position towards the open position and ultimately engages in the blocking receptacle in order to block the cylinder core against rotation beyond the blocking rotational position towards the open position.

[0034] In some embodiments, it can therefore also be provided generally and independently of the design of the locking cylinder with a query gate and / or a query section that the cylinder core, when the query pin is not in the query position, can be rotated from the closed position into a blocking rotational position, in which the blocking pin pretensioned into the blocking position engages in a blocking receptacle formed on the cylinder housing and thereby blocks further rotation of the cylinder core in the direction of the open position.

[0035] In some embodiments, the cylinder core can be rotated from the blocking rotational position into the closed position when the interrogation pin is not in the interrogation position. In particular, in some embodiments, the cylinder core can thus be rotated between the closed position and the blocking rotational position when the interrogation pin is not in the interrogation position. This can be provided in particular in embodiments in which the key can only be released from the keyway when the cylinder core is in the closed position, so that a possibly accidentally inserted incorrect key can be removed again after the cylinder core has been rotated back into the closed position, whereas movement of the cylinder core into the open position can be prevented by the locking pin striking the blocking stop.

[0036] In some embodiments, the interrogation gate can have a return bevel along which the locking pin can be guided out of the blocking receptacle upon rotation of the cylinder core from the blocking rotational position towards the closed position. In this respect, the blocking receptacle can not have a blocking stop, particularly in the direction of the closed position, but rather a return bevel which enables the locking pin to be pushed back against its pretension. The return bevel can furthermore in particular adjoin the aforementioned interrogation section, so that the locking pin can be guided via the interrogation rotational position and the interrogation section upon rotation from the blocking rotational position into the closed position in order to be able to be guided from the interrogation section, in particular via the aforementioned interrogation bevel, back into the aforementioned blocking receptacle, into which the locking pin can engage in the closed position.

[0037] In some embodiments, the cylinder core can be rotated from the closed position through the interrogation rotational position to the open position. In other embodiments, however, the cylinder core can be rotated from the closed position along a first rotational direction to the interrogation rotational position and from the interrogation rotational position along a second rotational direction opposite the first rotational direction to the open position.

[0038] In this respect, some embodiments may provide for the cylinder core to be rotatable from the closed position to the open position by a continuous or continuous rotation. During this rotation, the cylinder core can pass through the interrogation rotational position, in which the locking pin can be taken over, so to speak, and held in the release position during the further rotation into the open position. In particular, the cylinder core can also pass through the blocking rotational position, whereby further rotation may only be possible if the interrogation pin is arranged in the interrogation position and the locking pin is therefore held in the release position.

[0039] In other embodiments, however, it may be provided that the cylinder core must first be rotated along a first rotational direction into the interrogation position in order to thereby transfer the locking pin into the release position and then hold it on the interrogation pin. After this rotation along the first rotational direction, the cylinder core in such embodiments can be moved along a second rotational direction opposite to the first rotational direction into the open position, provided that the associated key has been inserted into the keyway and the locking pin is therefore held in the release position.During this rotation along the second direction of rotation, the cylinder core can thus pass through the closed position, which in such embodiments can also correspond in particular to the blocking rotational position, so that the locking pin can strike against a blocking receptacle upon reaching the closed position if the interrogation pin has not been moved into the interrogation position. In this respect, in such embodiments, the aforementioned blocking receptacle can also form the blocking receptacle, so that the locking pin, for example, in the closed position, can directly bear against a blocking stop, which prevents rotation along the second direction of rotation starting from the closed position, unless the rotation along the first direction of rotation into the interrogation rotational position has previously occurred.

[0040] In some embodiments, the permanent magnet can be configured to pull the locking pin, when the interrogation pin is in the interrogation position, into the release position against the preload of the locking pin. Such embodiments can be provided, in particular, as an alternative to embodiments with the interrogation gate explained above, in that a key is simply inserted into the keyway, through which the interrogation pin can be moved into the interrogation position, whereupon the locking pin can be pulled into the release position against its preload and then held on the interrogation pin.In such embodiments, it can also be provided in particular that the respective prestresses exerted on the interrogation pin and the locking pin add up to exceed an attractive force exerted by the permanent magnet when the interrogation pin is in the interrogation position and the locking pin is in the release position, so that the locking pin can return to the locked position after the cylinder core has been returned to the closed position and the key has been removed from the keyway.

[0041] In some embodiments, the associated key can be inserted into the keyway in the closed position and removed from the keyway. In particular, the associated key can only be removed from the keyway in the closed position.

[0042] The query pin and the locking pin as well as the respective preload elements, in particular respective springs, for generating the respective preload can, in some embodiments, be pre-assembled in a mounting sleeve, wherein the cylinder core can have a mounting receptacle into which the mounting sleeve can be inserted.

[0043] In particular, such pre-assembly of the locking device can facilitate the assembly of the locking cylinder overall, since the small components of the locking device—the respective pre-tensioning elements, the interrogation pin, and the locking pin—do not have to be inserted directly and, for example, one after the other into the cylinder core, but can first be pre-assembled in the mounting sleeve so that the entire locking device can then be inserted into the mounting receptacle as a single assembled unit in a single assembly step. In particular, the locking device can therefore encompass the mounting sleeve and / or the locking device can be pre-assembled entirely outside the cylinder core so that it can be inserted into the cylinder core as a pre-assembled unit.

[0044] In particular, the mounting sleeve can further comprise respective support edges for the preload elements. Furthermore, the preload elements can be inserted into the mounting sleeve from two opposite sides. Accordingly, the query pin and the locking pin can also be inserted into the mounting sleeve from opposite sides. The mounting sleeve can therefore be open on both sides.

[0045] In some embodiments, the interrogation pin can be urged into the interrogation position by a coding elevation arranged in an axial groove extending from a key tip of the associated key.

[0046] Due to the above-described interaction between the interrogation pin and the locking pin, the height of such a coding protrusion can be sensed. If a key is inserted into the keyway that can sort the tumblers into the release position, but has a coding protrusion that is too low, the interrogation pin cannot be moved into the interrogation position, and the interrogation pin and the locking pin cannot be moved sufficiently close together for the interrogation pin to hold the locking pin in the release position. Consequently, the cylinder core cannot be moved into the open position.If, however, a key is inserted into the keyway which has a coding protrusion that is too high, the interrogation pin is pushed beyond the interrogation position, so that a locking pin resting against the interrogation pin and held to the interrogation pin by the permanent magnet can still protrude into the cylinder housing and thereby block rotation of the cylinder core. In embodiments in which the interrogation pin rests against a retaining edge of the cylinder core in the interrogation position, a key design with a coding protrusion that is too high can also result in the key not being able to be fully inserted into the keyway, since the interrogation pin is already pushed against the retaining edge by the coding protrusion before the key is fully inserted into the keyway, thus blocking further insertion of the key.In this respect, a precise design of the coding elevation is necessary in order to be able to rotate the cylinder core into the open position.

[0047] In addition, the formation of a coding elevation in an axial groove may require a more precise formation of the key, since the coding elevation must be formed with the correct height and positioning on the key, in particular in the groove. As explained in more detail below, the locking cylinder may also have further elements which interact with the groove and / or the coding elevation, so that an arrangement of the coding elevation in the groove may be necessary in order to be able to interact with the interrogation pin, whereas the mere formation of a large-area elevation on the key may not be sufficient. In such embodiments, an exact positioning of the coding elevation and a formation of the coding elevation with a precisely specified height on the associated key may therefore be necessary in order to be able to move the interrogation pin into the interrogation position and thereby hold the locking pin in the release position.

[0048] In some embodiments, the locking cylinder may further comprise a coding device having a first axial stop and a second axial stop for the key, wherein the first axial stop and the second axial stop engage in the key channel, and wherein the second axial stop is offset along the key insertion direction relative to the first axial stop to an axial end of the cylinder core facing away from the key insertion opening. Furthermore, the first axial stop may comprise a passage for the passage of a coding elevation formed on the associated key, wherein the second axial stop may form a stop for the coding elevation.

[0049] In particular, the coding protrusion can be the coding protrusion already mentioned above, which is also designed to interact with the interrogation pin in order to push the interrogation pin into the interrogation position and thereby hold the locking pin in the release position. Furthermore, it can be provided that the associated key is designed as a reversible key and has a respective coding protrusion on opposite sides of the key. One of the coding protrusions can interact with the interrogation pin and the other of the coding protrusions can interact with the coding device depending on the orientation of the key during insertion into the keyway, as will also be explained in more detail below.

[0050] By providing two offset axial stops for the key, the coding device can, in particular, offer further options for coding the key. For example, the second axial stop can be used to query the axial position of the coding protrusion on the key. If, for example, the coding protrusion is offset too far toward the key tip, the key will strike the second axial stop before it is fully inserted into the keyway, preventing the locking cylinder from being actuated and the coding protrusion or another coding protrusion, in particular, from reaching the interrogation pin.Furthermore, by providing the first axial stop with the passage for the coding protrusion, the width and positioning of the coding protrusion transverse to the key insertion direction can also be checked. Coding protrusions that are too wide and / or not precisely positioned in the transverse direction can strike against the boundaries of the first axial stop or the passage, preventing the key in question from being fully inserted into the keyway. Furthermore, in some embodiments, the passage can be closed on a side facing away from the keyway, so that the height of the coding protrusion can also be checked by the first axial stop.

[0051] Furthermore, the first axial stop can also form a stop for the associated key, allowing the correct distance along the key insertion direction between the coding protrusion and a key element that abuts against the first axial stop to be determined. If this distance is too small, the key will already strike the first axial stop before the coding protrusion reaches the second axial stop, preventing the key from being fully inserted into the keyway and the cylinder core from being actuated. The coding device thus also enables further coding of the associated key to increase its forgery security.

[0052] Thus, in some embodiments, the associated key fully inserted into the keyway may strike both the first axial stop and the second axial stop.

[0053] In some embodiments, the coding device and the interrogation pin can engage in the keyway on opposite keyway broad sides. In particular, it can also be provided that the cylinder core has two cylinder core halves that can be assembled during assembly of the cylinder core and / or the locking cylinder, wherein the coding device and the interrogation pin can be arranged on different cylinder core halves in some embodiments.

[0054] In some embodiments, the coding device and the interrogation pin may be configured to cooperate with respective coding projections formed on opposing key broadsides of the associated key.

[0055] As already explained, the assigned key can in particular be a reversible key, which can be designed symmetrically with respect to rotations around the cylinder rotation axis by 180°. Therefore, the key can be inserted into the keyway in any orientation with respect to such rotations of 180°, wherein, regardless of the orientation of the key, a respective coding elevation can interact with the interrogation pin and the coding device. This can make it possible for the coding device to scan a positioning of the coding elevation, a width of the coding elevation and / or a height of the coding elevation, wherein the interrogation pin can also scan the positioning and height of the coding elevation. Furthermore, by scanning the height of the coding elevation twice, for example, any tolerances can be minimized in order to increase the key's security against forgery.

[0056] In some embodiments, the passage may have two lateral boundaries offset from one another transversely to the cylinder's rotation axis, through which the coding protrusion can be passed when the key is inserted into the keyway. In particular, the passage may thus be limited on both sides, for example, to enable the width of the coding protrusion and / or its positioning transversely to the cylinder's rotation axis to be interrogated.

[0057] In some embodiments, the end faces of the boundaries facing the key insertion opening can form the first axial stop. In this respect, it can be provided, in particular, that the associated key strikes the end faces of the boundaries that delimit the passage for the coding projection when the associated key is fully inserted into the keyway.

[0058] In some embodiments, the outer surfaces of the boundaries can form an inner guide for a groove on the associated key, in which groove the coding elevation is formed. The boundaries of the passage can thus form elements that interact directly with the groove to, on the one hand, facilitate guiding the key into the keyway, but on the other hand, also to be able to query the width of the groove. Due to the design of the coding device with a passage for the coding elevation, the coding elevation must necessarily be formed in a groove of the associated key, since a key with a wide elevation already strikes directly against the first axial stop. If the groove is also too narrow, the key also strikes directly against the first axial stop and cannot be fully inserted into the keyway.In this respect, the coding device can be used to scan a shape of the key in the area of ​​a key tip as a whole by querying a position of the coding elevation, its width and height as well as a width and / or length of the groove.

[0059] In some embodiments, the passage may be arch-shaped and the first stop may have a connecting portion by which the lateral boundaries are connected to one another on a side of the first axial stop facing away from the keyway.

[0060] Starting from a view in which the coding elevation extends upwards from a key shaft, the passage can thus be closed above the coding elevation in some embodiments in order to be able to scan a height of the coding elevation.

[0061] An arched passage can, in particular, act as a gate for the passage of the coding protrusion, whereby the connecting section of such an arched passage can, for example, also be linear and aligned approximately perpendicular to the lateral boundaries. However, it is also possible for the connecting section to have an arched shape in order to be able to scan, for example, a truncated cone-shaped coding protrusion and / or a coding protrusion with a rounded or curved upper surface as precisely as possible. In this respect, in some embodiments, a shape of the coding protrusion at an end facing away from the key shank can also be scanned through the passage.

[0062] In some embodiments, the key channel can extend laterally beyond the first stop element and the second stop element, transverse to the key insertion direction. Thus, in some embodiments, the key channel's broad sides can extend transversely to the key insertion direction beyond the axial stops. Such a configuration allows the key to be guided laterally past the axial stops at the key tip, for example, to achieve key guidance.

[0063] In some embodiments, the coding device can be arranged at an end portion of the cylinder core opposite the key insertion opening. Alternatively or additionally, the locking cylinder can have a plurality of tumblers, wherein all of the plurality of tumblers can be arranged between the key insertion opening and the coding device. However, even with a coding device arranged at an end portion of the cylinder core opposite the key insertion opening, the coding device can be arranged between the key insertion opening and a groove formed on the cylinder core for attaching a snap ring for axially fixing the cylinder core in the cylinder housing.On the other hand, the installation space required for the locking devices can in principle be kept free of the coding device, so that the coding device can enable additional coding compared to the locking devices without having to save a locking device.

[0064] In some embodiments, the coding device can be arranged off-center with respect to the key channel, in particular transversely to the key insertion direction. Accordingly, the two axial stops can also be arranged off-center in such embodiments, and / or neither of the axial stops can engage centrally in the key channel with respect to a transverse direction oriented transversely to the key insertion direction.

[0065] In some embodiments, the first axial stop and the second axial stop can be formed on respective coding elements inserted into the cylinder core, in particular respective plates.

[0066] In particular, in some embodiments, the first axial stop and the second axial stop can be formed on separate coding elements, which can be inserted into the cylinder core during assembly of the locking cylinder. For example, the coding elements can also lie directly adjacent to one another when inserted.

[0067] In some embodiments, the cylinder core can have a receptacle for inserting the coding elements. In particular, in such embodiments, the coding elements can therefore be inserted into a receptacle in the cylinder core during assembly of the locking cylinder, so that the first axial stop and the second axial stop can engage in the key channel. For this purpose, the receptacle can, for example, have respective edges in order to be able to determine a radial positioning of the coding elements and a depth of engagement of the axial stops in the key channel. Furthermore, in some embodiments, the cylinder core can have a respective receptacle for inserting the coding elements, or the cylinder core can have a common receptacle for inserting both coding elements, wherein the coding elements inserted into the common receptacle can in particular lie against one another.

[0068] In some embodiments, the receptacle can have a receiving opening on an outer side of the cylinder core, through which the coding elements can be inserted into the receptacle. The inserted coding elements can, in particular, extend radially to the outer side of the cylinder core and have a curvature on the outer side corresponding to the cylinder core. In this respect, the receiving opening can be closed, so to speak, by inserting the coding elements, so that the cylinder core is completed on the outer side, allowing it to be inserted precisely into the core receiving section of the cylinder housing.

[0069] In some embodiments, the coding device may further comprise a one-piece coding element on which the first axial stop and the second axial stop are formed. In particular, in such embodiments, the coding device may comprise a single coding element, which is formed as a single material-bonded part and on which both the first axial stop and the second axial stop are formed. Furthermore, in some embodiments, the single coding element may be selectively insertable into the cylinder core, and in particular into a receptacle formed on the cylinder core, or the coding element may be formed directly on the cylinder core and, for example, be integrally formed thereon.

[0070] In some embodiments, the one-piece coding element may be arranged in the keyway at an end of the keyway opposite the key insertion opening.

[0071] In some embodiments, the coding element can be integrally formed on the cylinder core. In particular, in some embodiments, the cylinder core can comprise two cylinder core halves, wherein the coding element can be integrally formed in one of the two cylinder core halves. For example, the cylinder core or its cylinder core halves can be formed using a zinc die-casting process, wherein a relief of the coding element can be provided in a mold for producing one cylinder core half in order to be able to form and / or integrally form the coding element directly on the respective cylinder core half. In some embodiments, the coding element can be designed in the manner of a fork and have two extensions that delimit the passage and point in the direction of the key insertion opening, between which extensions the coding elevation can be inserted into the fork.The extensions can further form the first axial stop, and a receiving section, which connects the two extensions on a side of the fork facing away from the key insertion opening, can form the second axial stop. Furthermore, in such embodiments, the extensions can extend axially in the direction of the key insertion opening in order to accommodate the coding protrusion. However, a base formed by the cylinder core can delimit the passage on a side facing away from the key channel, so that even in such embodiments, the height of the coding protrusion can be scanned by the fork-like coding element.

[0072] The invention further relates to a locking system which comprises a locking cylinder according to one of the embodiments explained above and the associated key.

[0073] In particular, the associated key can have a coding protrusion that interacts with the interrogation pin and is designed to push the interrogation pin into the interrogation position when the key is fully inserted into the keyway. The height of the coding protrusion can, in particular, be precisely selected such that the interrogation pin just reaches the interrogation position when the associated key is fully inserted into the keyway.

[0074] Furthermore, the associated key can be designed, in particular, to sort the tumblers into the release configuration upon full insertion into the keyway, in order to release the cylinder core for rotation relative to the cylinder housing. For this purpose, the associated key can, in particular, have respective sorting structures that interact with a respective tumbler. These sorting structures can, in particular, be formed on a key broadside of the associated key.

[0075] In some embodiments, the associated key may have an axial groove extending from a key tip, in which a coding protrusion is formed. The coding protrusion may be designed to force the interrogation pin into the interrogation position when the key is fully inserted into the keyway.

[0076] In particular, the coding protrusion can be formed on a broad side of the associated key, so that the axial groove can also be formed on the broad side of the key. As already explained, by attaching such a coding protrusion and arranging it in an axial groove, a more extensive coding of the associated key can be achieved, in particular to increase its forgery security.

[0077] An axial groove can generally extend substantially along a longitudinal axis of the associated key, but does not necessarily have to have a rectilinear shape. For example, the respective outer sides or lateral boundaries of an axial groove can therefore be straight or curved.

[0078] In some embodiments, the coding protrusion can be designed to be freestanding in the groove. In particular, in such embodiments, the groove can have a depth between the coding protrusion and a rear boundary of the groove facing away from the key tip that corresponds to the depth of the groove between the coding protrusion and the key tip. A freestanding coding protrusion can, for example, be truncated cone-shaped, conical, truncated pyramid-shaped, pyramid-shaped, pin-shaped, and / or hemispherical.

[0079] Alternatively, it is also possible in principle for the coding elevation to extend as an axial web in the groove, which leads to a rear boundary of the groove facing away from the key tip.

[0080] In some embodiments, the coding elevation may have a recess for engagement of the interrogation pin on an interrogation surface facing in the direction of the interrogation pin when the key is inserted into the key channel.

[0081] Such a recess can also enable further coding of the assigned key, in that it is not the absolute or maximum height of the coding protrusion that determines the displacement of the interrogation pin, but rather this height minus a depth of the recess into which the interrogation pin engages when the assigned key is fully inserted into the keyway. This allows further coding to be implemented on the key for coding protrusions that generally have the same maximum height. Coding protrusions that have the correct maximum height but no recess can push the interrogation pin beyond the interrogation position, so that the interrogation pin cannot be positioned exactly in the interrogation position and the locking pin cannot be held in the release position.In addition, particularly in embodiments which have the above-mentioned coding device, a maximum height of the coding elevation can still be scanned by a height of the passage provided by a first axial stop of such a coding device.

[0082] In some embodiments, the associated key can be designed as a reversible key with an elongated key shaft, which has two opposing broad sides and two opposing narrow sides, wherein the key can have a respective groove on each broad side with a coding protrusion arranged therein. Such a reversible key can, in particular, be designed symmetrically with respect to rotations of 180° around the longitudinal axis of the key, so that the associated key can be inserted into the keyway in any orientation with respect to such rotations of 180°. Furthermore, regardless of this orientation of the key, a respective coding protrusion can always interact with the interrogation pin.

[0083] In some embodiments, the locking cylinder can have a coding device which has a first axial stop and a second axial stop for the key, wherein the first axial stop and the second axial stop engage in the key channel. Furthermore, the second axial stop can be offset along the key insertion direction relative to the first axial stop to an axial end of the cylinder core facing away from the key insertion opening. The first axial stop can have a passage for the passage of one of the two coding elevations, and the second axial stop can form a stop for the one coding elevation, wherein the other of the two coding elevations of the associated key can be designed to urge the interrogation pin into the interrogation position when the one coding elevation bears against the second axial stop.

[0084] In such embodiments, each of the two coding elevations can thus always interact with a respective element, the second axial stop or the query pin, regardless of the orientation of the associated key, in order to be able to implement the additional codings of the key explained.

[0085] Furthermore, the locking cylinder and / or the key of the locking system can have one or more features of the features already mentioned above in connection with embodiments of a locking cylinder. Furthermore, the invention relates to a key for use in a locking system of the type explained above, wherein the key is designed to sort the at least one tumbler into the release configuration upon complete insertion into the key channel, and wherein the key has a coding elevation designed to urge the interrogation pin into the interrogation position upon complete insertion of the key into the key channel.

[0086] Furthermore, in some embodiments, the coding protrusion can be arranged in an axial groove extending from a key tip, in particular freestanding. Furthermore, the coding protrusion can be arranged, in particular, on a broad side of the key.

[0087] In some embodiments, the coding protrusion can have a recess for engagement of the interrogation pin on an interrogation surface facing the interrogation pin when the key is inserted into the keyway. As already explained, the depth of the recess can achieve additional coding of the associated key.

[0088] In some embodiments, the key can be designed as a reversible key with an elongated key shank, which has two opposing broad sides and two opposing narrow sides. The key can have a respective groove on each of the broad sides with a coding projection arranged therein. In this respect, the key can be designed, in particular, symmetrical with respect to rotations of 180° around the cylinder rotation axis, which can correspond to a longitudinal axis of the key.

[0089] Furthermore, the key may have one or more features of the features already mentioned above in connection with a locking cylinder to be operated or the locking system explained.

[0090] Furthermore, the invention relates to the use of a key of the type explained above for actuating a locking cylinder of the type explained above, wherein the key in particular has a coding elevation which is designed to urge the interrogation pin into the interrogation position when the key is fully inserted into the key channel.

[0091] The invention is explained below purely by way of example with reference to the drawings using exemplary embodiments. They show:

[0092] Fig. 1 is an exploded view of a first embodiment of a locking system with a locking cylinder and an associated key, but with a cylinder housing of the locking cylinder hidden,

[0093] Fig. 2 a top view of the assigned key,

[0094] Fig. 3A to 3C show two perspective views of the key together with coding elements of a coding device of the locking cylinder and a longitudinal section of the locking cylinder with the key inserted to illustrate the interaction of the key with the coding device of the locking cylinder,

[0095] Fig. 4 is an exploded view of another embodiment of the locking system with the cylinder housing hidden,

[0096] Fig. 5A and 5B are respective cross-sectional views through the locking cylinder to illustrate the interaction of a coding elevation of the associated key with a locking device of the locking cylinder,

[0097] Fig. 6A and 6B show a respective longitudinal sectional view of a cylinder core of a respective embodiment of a locking cylinder with a key inserted to further illustrate the interaction of the coding elevation with the locking device, wherein in the embodiment according to Fig. 6B, a mounting sleeve is also provided for pre-assembling components of the locking device,

[0098] Fig. 7A and 7B are respective longitudinal sectional views illustrating a further embodiment of the locking cylinder and its locking device, wherein the interaction of the associated key with the locking device requires a recess in the coding elevation formed on the key, and Fig. 8A and 8B are respective perspective exploded views of a cylinder core of a locking cylinder according to a further embodiment.

[0099] Fig. 1 shows an exploded view of a locking system 123, which has a locking cylinder 11 and an associated key 23 provided for actuating the locking cylinder 11. However, with regard to the locking cylinder 11, Fig. 1 only shows a cylinder core 19 of the locking cylinder 11 comprising two cylinder core halves 65 and 67, wherein this cylinder core 19, when the locking cylinder 11 is mounted, is rotatably received in a core receiving section 15 of a cylinder housing 13 (not shown in Fig. 1) about a cylinder rotation axis D between a closed position G and an open position O (cf. Figs. 5A and 5B). Such a cylinder housing 13 is generally known to those skilled in the art and is shown, for example, in Figs.5A and 5B, wherein the cylinder housing 13 illustrated therein has the core receiving portion 15 for receiving the cylinder core 19 and a flange portion 17 projecting radially away from the core receiving portion 15, so that the locking cylinder 11 in question is designed as a profile cylinder. Furthermore, the locking cylinder 11 can have tumblers (not shown in the figures) to prevent rotation of the cylinder core 19 relative to the core receiving portion 15 of the cylinder housing 13, unless the associated key 23 has been fully inserted through a key insertion opening 25 into a key channel 21 formed on the cylinder core 19 along a key insertion direction E, which corresponds to a longitudinal axis L of the associated key 23.

[0100] For example, tumblers of such a locking cylinder 11 can be designed as pin tumblers, which have housing pins arranged in the flange section 17 and prestressed by tumbler springs in the direction of the cylinder core 19, for example to engage in bores 37 of the cylinder core 19 when the key 23 is not inserted into the keyway 21. Core pins of the pin tumblers can also be arranged in the cylinder core 19, wherein the core pins can be displaced outwards by corresponding sorting structures of the key 23 upon complete insertion of the associated key 23 into the keyway 21, in order to thereby transfer the tumblers into a release configuration and push the housing pins back into the flange section 17 against their prestress, so that the tumblers release the cylinder core 19 for rotation into the open position O.However, the design of such tumblers, and in particular such pin tumblers, is generally known to those skilled in the art, so there is no need to go into detail here. Furthermore, it is apparent, in particular from Figs. 5A and 5B, that the key channel 21 has an elongated cross-section with two opposing key channel broad sides 27 and 29 and two opposing key channel narrow sides 31 and 33. Accordingly, a key shank 127 of the associated key 23 is also elongated and has two opposing key broad sides 115 and 117 and two opposing key narrow sides 119 and 129, so that the key 23 can be inserted snugly into the key channel 21.In particular, the keyway narrow sides 31 and 33 are further aligned perpendicular to the keyway broad sides 27 and 29 and the key narrow sides 119 and 121 are aligned perpendicular to the key broad sides 115 and 117.

[0101] Although FIGS. 5A and 5B illustrate only one possible embodiment of a locking cylinder 11 according to the present disclosure, each of the disclosed locking cylinders 11 can generally comprise a cylinder housing 13 with a core receiving portion 15 for rotatably supporting the cylinder core 19, and the cylinder core 19 can generally comprise an elongated keyway 21. However, embodiments are also possible, for example, in which the locking cylinder 11 is not designed as a profile cylinder, but rather, for example, as a round or oval cylinder.

[0102] In order to achieve further coding options in addition to the tumblers in such a locking cylinder 11, a coding device 39 is arranged on an end section 55 of the cylinder core 19 in the locking cylinder 11 of the locking system 123 illustrated in Fig. 1. The coding device 39 comprises, for example, two coding elements 56, which are designed as respective small plates 57 and can be inserted on an outer side of the cylinder core 19 through a receiving opening 61 into a receptacle 59 of the cylinder core 19. In this case, one of the coding elements 56 forms a first axial stop 41 and the other of the two coding elements 56 forms a second axial stop 43 for the associated key 23, wherein the two axial stops 41 and 43 - as particularly illustrated in the longitudinal section of Fig. 3C - engage in the key channel 21 when the coding elements 56 are inserted into the receptacle 59.In addition, the second axial stop 43 is offset along the key insertion direction E relative to the first axial stop 41 in the direction of an axial end of the cylinder core 19 opposite the key insertion opening 25.

[0103] Fig. 1 further shows that the first axial stop 41 has a passage 45 delimited by two lateral boundaries 47, through which a coding protrusion 125 formed on the associated key 23 can be passed during insertion of the key 23 into the keyway 21. In contrast, the second axial stop 43 forms an axial stop for the coding protrusion 125, so that the coding protrusion 125 rests against the second axial stop 43 when the associated key 23 has been fully inserted into the keyway 21 (see in particular also Fig. 3C).

[0104] As can be seen in particular from Fig. 2, the coding elevation 125 on the associated key 23 is formed in a groove 51 which extends axially from a key tip 91 with respect to a longitudinal axis A of the associated key 23. In addition, the coding elevation 125 is formed free-standing in the axial groove 51, so that the coding elevation 125 forms a somewhat local and, for example, truncated cone-shaped elevation in the groove 51, wherein a depth of the groove 51 between the coding elevation 125 and a rear boundary 93 of the groove 51 corresponds to a depth of the groove 51 between the coding elevation 125 and the key tip 91. Furthermore, the key 23 is designed in particular as a reversible key and symmetrical with respect to rotations of 180° around the longitudinal axis A of the key 23, so that at the position shown in Fig.2, a groove 51 with a correspondingly designed coding elevation 125 is also provided on the opposite side of the key 117. This can, in particular, make it possible to insert the key 23 into the key channel 21 in any orientation with respect to such rotations of 180° and to actuate the locking cylinder 11.

[0105] 3A and 3B illustrate that the outer boundaries 47 of the passage 45 form an inner guide for the groove 51, so that the key 23 can be centered and guided during insertion into the key channel 21 by the interaction of the inner sides of the groove 51 with the outer boundaries 47 of the passage 45 of the first axial stop 41. In particular, however, end faces 49 of the outer boundaries 47 of the first axial stop 41 facing the key insertion opening 25 form a stop for the rear boundary 93 of the groove 51 facing away from the key tip 91, so that when the key 23 is fully inserted into the key channel 21, the coding elevation 125 can bear against the second axial stop 43 and the rear boundary 93 of the groove 51 can bear against the first axial stop (see in particular Figs. 3B and 3C).

[0106] This design of the locking cylinder 11 and its cylinder core 19 with the coding device 39 enables, in particular, a coding of the locking cylinder 11 that goes beyond the tumblers. For example, by positioning the second axial stop 43, an axial position of the coding elevation 125 on the associated key 23 or in the groove 51 can be queried, for example by a coding elevation 125 that is axially offset too far in the direction of the key tip 91 can strike the second axial stop 43 even before the key 23 is fully inserted into the key channel 21, so that the cylinder core 19 cannot be actuated by means of the relevant key even if the key is fundamentally suitable for sorting the tumblers.

[0107] In addition, a width of the coding protrusion 125 and a positioning of the coding protrusion 125 transversely to the key insertion direction E can be scanned through the passage 45 formed by the first axial stop 41, since, for example, a coding protrusion 125 that is too wide or incorrectly positioned in the transverse direction cannot be guided through the passage 45 and already strikes the first axial stop 41, so that the key in question cannot be fully inserted into the key channel 21 again.

[0108] 1, 3A and 3B show that the passage 45 according to this embodiment is designed like an arch and the two lateral boundaries 47 are connected to one another on a side facing away from the key channel 21 by a connecting section 53. Therefore, a height of the coding elevation 125 in the sense of an extension of the coding elevation 125 starting from a bottom of the groove 51 perpendicular to an extension plane of the key shank 127 can also be scanned through the passage 45. Coding elevations 125 that are designed too high also already abut the first axial stop 41, so that the cylinder core 19 cannot be actuated by means of the key in question, even if this key should be suitable for sorting the tumblers.Furthermore, the engagement of the first axial stop 41 in the key channel 21 also requires that the coding elevation 125 is formed in a correctly designed groove 51, since a mere raised design of the key tip 91 as a whole or a groove that is too narrow would result in the key 23 already striking the first axial stop 41 with the key tip 91.

[0109] In addition, by designing the coding device 39 with two offset axial stops, a distance between the coding protrusion 125 and the rear boundary 93 of the groove 51 can be checked, in that the rear boundary 93 of the groove 51 can already strike the first axial stop 41, for example due to an insufficient distance between the coding protrusion 125 and the rear boundary 93, before the coding protrusion 125 reaches the second axial stop 43. In this case, too, the key 43 in question cannot be fully inserted into the keyway 21. In summary, the coding device 39 enables, in particular, by varying an axial extension of the coding element 56 or the plate 57, which forms the first axial stop 41 (checking the distance between the coding protrusion 125 and the rear boundary 93 of the groove 51),Varying the positioning of the passage 45 in the transverse direction (querying the position of the coding elevation 125 in the transverse direction), varying the width of the passage (querying the width of the coding elevation 125), varying the axial positioning of the second axial stop 43 (querying the axial position of the coding elevation 125), varying the height of the passage (querying the height of the coding elevation 125) and / or varying the width of the first axial stop 41 and / or the second axial stop (querying the width of the groove 51) to realize numerous further codings of the locking cylinder 11, in particular to increase the forgery security of the associated key 23.

[0110] Furthermore, Fig. 3C shows that the coding elements 56, after insertion into the receptacle 59, close flush with an outer side of the cylinder core 19, wherein, as can be seen from Fig. 1, the coding elements 56 also have a curvature on the outer side corresponding to the cylinder core 19, so that the cylinder core 19 can be completed to a certain extent by inserting the coding elements 56 in order to be able to be rotatably received in the core receiving section 15 of the cylinder housing 13.

[0111] Fig. 4 shows a further embodiment of a locking system 123 with a locking cylinder 11, wherein again the cylinder housing 13, which is basically illustrated with reference to Figs. 5A and 5B, is hidden. In this embodiment too, a coding device 39 is arranged on an end section 55 of a cylinder core 19 of the locking cylinder 11, which coding device has a first axial stop 41 and a second axial stop 43. As already in the embodiment explained with reference to Figs. 1 to 3C, the first axial stop 41 has a passage 45 for the explained coding elevation 125 of the associated key 23, so that the fully inserted key 23 can abut with the coding elevation 125 on the second axial stop 43 and with a rear boundary 93 of a groove 51, in which the coding elevation 125 is formed, on the first axial stop 41.

[0112] While the coding device 39 and its coding elements 56 can be inserted into a receptacle 59 of a first cylinder core half 65 of the cylinder core 19, in the embodiment illustrated with reference to Fig. 4, a locking device 75 is also provided on a second cylinder core half 67 of the cylinder core 19. The locking device 75 has a query pin 77 that is preloaded by a spring 79 in the direction of the key channel 21 and engages in the key channel 21. In addition, a locking pin 83 is provided that is preloaded outwards and in the direction of the cylinder housing 13 by a spring 85 and can be urged into a locking position S due to the preload, in which the locking pin 83 prevents rotation of the cylinder core 19 into the open position O. The functioning of the locking device 75 is explained below with reference to Figs. 5A and 5B.

[0113] Fig. 5A illustrates the cylinder core 19 in the closed position G, in which the associated key 23 can be inserted into the keyway 21 and removed from the keyway 21. According to the illustration in Fig. 5A, however, no key 23 is inserted into the keyway 21 and the interrogation pin 77 engages in the keyway 21 due to its preload, which is deployed by the spring 79 supported on an edge 81 of the cylinder core 19. In addition, the locking pin 83 is supported by the spring 85 on an edge 87 of the cylinder core 19 and, due to the deployed preload, assumes the aforementioned locking position S, in which the locking pin 83 engages in a locking receptacle 97 formed in the core receiving section 15 of the cylinder housing 13.

[0114] For example, in order to open a lock, as part of which the locking cylinder 11 can be used, the cylinder core 19 can be moved from the closed position G illustrated in Fig. 5A by 90° into the open position O, in that the cylinder core 19 can be rotated along a direction of rotation D1 into the open position O after inserting the associated key 23 and transferring the tumblers into the release configuration. However, an additional coding can be created by the locking device 75, wherein the cylinder core 19 can only be turned into the open position O by a key 23 which, on the one hand, can sort the tumblers and, on the other hand, has a coding elevation 125 designed to interact with the locking device 75.

[0115] As Fig. 5B illustrates, the interrogation pin 77 can be displaced outwards into an interrogation position A by the coding elevation 125 by inserting the associated key 23 into the key channel 21, counter to the pretension exerted by the spring 79. A permanent magnet 95 is also arranged on an end section 107 of the interrogation pin 77 facing the locking pin 83. However, as can be seen from the combination with Fig. 5A, this permanent magnet 95 does not come into direct mechanical contact with the locking pin 83 simply by inserting the associated key 23. Therefore, in this embodiment, it is provided that the locking pin 83 initially remains in the locking position S once the associated key 23 has been inserted into the key channel 21.However, a sensing gate 99 is formed on the cylinder housing 13, so that the cylinder core 19, despite the locking pin 83 being in the locked position S, can be moved from the closed position G along the direction of rotation D1 into a sensing rotational position C. During this rotation of the cylinder core 19, the locking pin 83 is guided along a sensing bevel 103 to a sensing section 101 of the sensing gate 99, whereby the locking pin 83 resting against the sensing section 101 no longer protrudes into the cylinder housing 13. Rather, during rotation from the closed position G into the sensing rotational position C, the locking pin 83 is pushed back against the pretension of the spring 85 into a release position F and, as shown in Fig. 5B, in the sensing rotational position C, comes into mechanical contact with the sensing pin 77, which is in the sensing position A, and the permanent magnet 95 arranged at its end section 107.

[0116] According to this embodiment, the strength of the permanent magnet 95 is selected such that the permanent magnet 95 can hold the locking pin 83 in the release position F against its pretension when the interrogation pin 77 is in the interrogation position A. Therefore, the cylinder core 19 can be rotated from the interrogation rotational position C shown in Fig. 5B into the open position O, provided that the interrogation pin 77 has previously been moved into the interrogation position A by the correctly formed coding elevation 125 of the key 23 and the locking pin 83 is held in the release position F by the magnetic force connection formed.

[0117] In order to be able to reliably hold the locking pin 83 in the release position F, the query pin 77 according to this embodiment is further designed to be wider than the locking pin 83 and rests against a retaining edge in the cylinder core 19 facing the locking pin 83, so that the locking pin 83 cannot pull the query pin 77 further outwards against its pretension in order to engage in the cylinder housing 13 despite the query pin 77 being positioned in the query position A.Furthermore, the strength of the attractive force exerted by the permanent magnet 95 on the locking pin 83 can exceed the preload exerted by the spring 85 on the locking pin 83 in order to be able to hold the locking pin 83 in the release position F, but can be less than a sum of the preload exerted by the spring 85 on the locking pin 83 and the preload exerted by the spring 79 on the query pin 77, so that the query pin 77 and the locking pin 83 can be released from one another again after the cylinder core 19 is rotated back into the closed position G and the associated key 23 is removed from the key channel 21.

[0118] In particular, the locking device 75 with the query pin 77 and the locking pin 83 thus also enables further coding of the locking cylinder 11. From Fig. 5B it can be seen that the locking pin 83 assumes the release position F in the query rotational position C regardless of whether the query pin 77 is in the query position A and a coding elevation 125 of the correct height is accordingly formed on the inserted key 23. However, the locking pin 83, which is not held in the release position F, due to its pretension as a result of further rotation of the cylinder core 19 in the direction of the open position O, engages with a blocking receptacle 109 formed on the cylinder housing 13 when a blocking rotational position B is reached. The blocking receptacle has a blocking stop 111 against which the locking pin 83 strikes when the blocking rotational position B is reached.Due to this impact, the locking pin 83 thus blocks further rotation of the cylinder core 19 in the direction of the open position O, unless the query pin 77 has previously been arranged in the query position A and the locking pin 83 has thus, to a certain extent, been taken over in the release position F when passing the query rotational position C.

[0119] In order to be able to move the cylinder core 19 into the open position O, it is therefore necessary to insert an associated key 23 with a correctly formed coding protrusion 125 into the keyway 21. However, a return bevel 105 adjoins the blocking receptacle 109 in a direction of rotation D2 opposite to the direction of rotation D1, so that the cylinder core 19 can be moved from the blocking rotational position B back into the closed position G even when the query pin 77 is not positioned in the query position A, in order to enable the removal of a possibly inadvertently inserted incorrect key.In addition, it can generally also be provided that the cylinder core 19 must first be rotated along the direction of rotation D2 opposite to the direction of rotation D1 in order to transfer the locking pin 83 into the release position F and to take it over by means of the query pin 77 in order to then rotate the cylinder core 19 along the direction of rotation D1 into the open position O. In particular, in such embodiments it can also be provided that the locking receptacle 97 already has a blocking stop for the locking pin 83, so that in such embodiments the cylinder core 19, starting from the closed position G, must first be rotated along the second direction of rotation D2 into the query rotation position C in order to then be able to be rotated along the direction of rotation D1 via the closed position G into the open position O when the locking pin 83 is held in the release position F.

[0120] Through the interaction of the interrogation pin 77 with the coding protrusion 125, in particular, a height and positioning of the coding protrusion 125 can be sensed, and the cylinder core 19 can only be actuated when a coding protrusion 125 of the correct height is positioned on the key shank 127 such that the coding protrusion 125 comes into contact with the interrogation pin 77. In addition, the design of the associated key 23 as a reversible key enables one of the coding protrusions 125 to always interact with the locking device 75 and its interrogation pin 77, regardless of the orientation of the key 23 with respect to a rotation of 180° about its longitudinal axis A, while the other of the two coding protrusions 125 can interact, in particular, with the coding device 39, illustrated, for example, in Fig. 4.

[0121] Fig. 6A again illustrates in a longitudinal section the interaction of the coding elevation 125 with the interrogation pin 77 in order to urge the latter into the interrogation position A and thereby to be able to hold the locking pin 83 in the release position F.

[0122] In the embodiment illustrated in Fig. 6B, a mounting sleeve 89 is also provided, in which the locking device 75 can be pre-assembled. In particular, the interrogation pin 77, the spring 79, the locking pin 83, and the spring 85 can thus be inserted into the mounting sleeve 89 outside the cylinder core 19, whereupon the locking device 75 can be inserted as a pre-assembled unit into a mounting receptacle 113 of the cylinder core 19 in a single assembly step. In particular, the mounting sleeve 89 can also provide the respective edges 81 and 87 for supporting the springs 79 and 85.

[0123] 7A and 7B further illustrate an embodiment in which the coding device 75 requires additional coding in the form of a recess 129 formed on the coding elevation 125 of the associated key 23 in order to be able to hold the locking pin 83 in the release position F. In Fig. 7A, a key 23 was inserted into the keyway 21 which, although it has a coding elevation 125 of the correct maximum height, no recess 129 is formed on the coding elevation 125. As a result, the interrogation pin 77, which is formed with a tip, is pushed beyond the interrogation position A by the coding elevation 125, and the locking pin 83 extends beyond the cylinder core 19 into the cylinder housing 13 (not shown in Fig. 7A), so that the locking pin 83 blocks rotation of the cylinder core 19 into the closed position G. While the coding survey 125 of the in Fig.Although the key 23 shown in Fig. 7A could thus be suitable for correctly pushing the interrogation pin 77 of an embodiment according to one of Fig. 6A or 6B into the interrogation position A, the key 23 in question cannot be used to actuate the locking cylinder 11 according to Fig. 7A.

[0124] Fig. 7B, on the other hand, illustrates the design of the key 23 assigned to this cylinder core 19 or the locking cylinder 11, in which the coding elevation 125 has the aforementioned recess 129, so that the interrogation pin 77 can engage in the recess 129 and be correctly arranged in the interrogation position A in order to be able to hold the locking pin 83 in the release position F. In particular, in this embodiment it can be provided that a strength of the permanent magnet 95 is selected such that the permanent magnet 95 can pull the locking pin 83 at least a little way inwards against its pretension into the release position F. Here too, however, it can be provided that the locking pin 83 is first moved by an interrogation guide 99 in the direction of the interrogation pin 77 in order to facilitate takeover by the interrogation pin 77 and its permanent magnet 95.Furthermore, in principle, it can also be provided in such embodiments that the locking pin 83 can be urged by a query link 99 into direct mechanical contact with the query pin 77 positioned in the query position A.

[0125] In addition, in embodiments according to Fig. 7B, it can be provided that a preload of the interrogation pin 77 exceeds a preload of the locking pin 83, so that the interrogation pin 77 cannot be pulled out of the interrogation position A by the locking pin 83 against the preload acting on the interrogation pin 77. On the other hand, the strength of the permanent magnet 95 or the attractive force exerted by the permanent magnet 95 on the locking pin 83 can again be less than a sum of the preloads of the locking pin 83 and the interrogation pin 77 in order to enable a separation of the locking pin 83 and the interrogation pin 77 after removal of the key 23.

[0126] 8A and 8B illustrate a further embodiment of a locking cylinder 11, which has a locking device 75 and a coding device 39. In contrast to the coding devices 39 explained above with reference to FIGS. 1 to 4, the coding device 39 according to the embodiment of FIGS. 8A and 8B has only a single coding element 63, which is molded directly onto the cylinder core half 67 and can be formed, for example, in the course of a zinc die-casting process for producing the cylinder core halves 65 and 67.

[0127] The coding element 63 is designed in the manner of a fork 69 and has two extensions 71 pointing axially in the direction of the key insertion opening 25 of the key channel 21, which form a first axial stop 41 and delimit a passage 45 for the coding elevation 125 of the associated key 23. The two extensions 71 are connected by a receiving section 73, so that the receiving section 73 can form a stop for the coding elevation 125. In addition, the coding element 63 is arranged directly on a base 131 of the cylinder core half 67 and the key channel 21, so that a height of the coding element 63 and in particular of the extensions 71 can also be used to scan the height of the coding elevation 125.Again, when the associated key 23 is designed as a reversible key, one of the coding projections 125 can interact with the coding device 39 and the coding element 63, whereas the other coding projection 125 can urge the interrogation pin 77 of the locking device 75 into the interrogation position A in order to thereby be able to hold the locking pin 83 in the release position F.

[0128] List of reference symbols

[0129] 11 locking cylinders

[0130] 13 cylinder housing

[0131] 15 Core receiving section

[0132] 17 Flange section

[0133] 19 cylinder core

[0134] 21 key channel

[0135] 23 keys

[0136] 25 Key insertion opening

[0137] 27 Key channel broadside

[0138] 29 Key channel broadside

[0139] 31 Keyway narrow side

[0140] 33 Keyway narrow side

[0141] 37 Hole

[0142] 39 Coding device

[0143] 41 first axial stop

[0144] 43 second axial stop

[0145] 45 passage

[0146] 47 lateral boundary

[0147] 49 front side

[0148] 51 groove

[0149] 53 connecting section

[0150] 55 final section

[0151] 56 coding element

[0152] 57 tiles

[0153] 59 Recording

[0154] 61 Receiving opening

[0155] 63 coding element

[0156] 65 cylinder core half

[0157] 67 Cylinder core half

[0158] 69 Fork

[0159] 71 extension

[0160] 73 Recording section

[0161] 75 locking device

[0162] 77 Query pin

[0163] 79 Spring 81 Edge

[0164] 83 Locking pin

[0165] 85 spring

[0166] 87 edge

[0167] 89 Mounting sleeve

[0168] 91 Key tip

[0169] 93 rear limit of the groove

[0170] 95 permanent magnet

[0171] 97 Locking recording

[0172] 99 query backdrop

[0173] 101 Query section

[0174] 103 Query slope

[0175] 105 Return slope

[0176] 107 End section of the query pin

[0177] 109 Blocking recording

[0178] 111 Blocking stop

[0179] 113 Mounting bracket

[0180] 115 Key Broadside

[0181] 117 Key Broadside

[0182] 119 Key narrow side

[0183] 121 Key narrow side

[0184] 123 locking system

[0185] 125 Coding Survey

[0186] 127 Key shaft

[0187] 129 Deepening

[0188] 131 floor

[0189] A query position

[0190] B Blocking rotation position

[0191] C Query rotation position

[0192] D Cylinder rotation axis

[0193] D1 Direction of rotation

[0194] D2 Direction of rotation

[0195] E Key insertion direction

[0196] F Release position

[0197] G Closed position

[0198] L Longitudinal axis

[0199] O Open position S Locked position

Claims

Claims 1. Lock cylinder (11), comprising a cylinder housing (13) with a core receiving section (15), a cylinder core (19) which is mounted in the core receiving section (15) so as to be rotatable about a cylinder rotation axis (D) between a closed position (G) and an open position (O) and has a key channel (21) extending along the cylinder rotation axis (D), into which key channel an associated key (23) can be inserted along a key insertion direction (E) through a key insertion opening (25), wherein the key channel (21) has an elongated cross-section with two mutually opposing key channel broad sides (27, 29) and two mutually opposing key channel narrow sides, at least one tumbler (35) which is designed to prevent the cylinder core (19) located in the closed position (G) from rotating into the open position (O) when the key (23) is not inserted into the key channel (21). secure,wherein the at least one tumbler (35) can be sorted into a release configuration by inserting the associated key (23), in which the at least one tumbler (35) releases the cylinder core (19) for rotation relative to the cylinder housing (13), and a locking device (75) which has a query pin (77) pretensioned in the direction of the key channel (21) and engaging in the key channel (21), as well as a locking pin (83) arranged in alignment with the query pin (77), wherein the locking pin (83) is pretensioned outwards into a blocking position (S) with respect to the cylinder rotation axis (D) and is designed to prevent rotation of the cylinder core (19) into the open position (O) in the blocking position (S), and wherein the query pin (77) can be urged into a query position (A) by fully inserting the associated key (23) into the key channel (21),wherein the interrogation pin (77) has a permanent magnet (95) at an end portion (107) facing the locking pin (83) and / or wherein the locking pin (83) has a permanent magnet (95) at an end portion facing the interrogation pin (77), and, wherein the permanent magnet (95) is designed to hold the locking pin (83) in a release position (F) when the interrogation pin (77) is urged into the interrogation position (A) against the pretension of the locking pin (83), in which release position the locking pin (83) releases the cylinder core (19) for rotation into the open position (O).

2. Lock cylinder (11) according to claim 1, wherein the locking pin (83) engages in a locking receptacle (97) formed on the cylinder housing (13) in the closed position (G) of the cylinder core (19).

3. Lock cylinder (11) according to claim 1 or 2, wherein the interrogation pin (77) engages in the key channel (21) on one of the key channel broad sides (27, 29).

4. Lock cylinder (11) according to one of the preceding claims, wherein the interrogation pin (77) is more strongly pre-tensioned than the locking pin (83).

5. Lock cylinder (11) according to one of the preceding claims, wherein the cylinder housing (13) has a query gate (99), wherein the locking pin (83) can be moved, in particular urged into the release position (F), by rotating the cylinder core (19) starting from the closed position (G) into a query rotational position (C) along the query gate (99) in the direction of the query pin (77), and wherein the query pin (77) and / or the locking pin (83) can be brought into operative contact with the permanent magnet (95) when the query rotational position (C) is reached, when the query pin (77) is in the query position (A).

6. Lock cylinder (11) according to claim 5, wherein the interrogation gate (99) has an interrogation bevel (103) along which the locking pin (83) can be guided during rotation of the cylinder core (19) from the closed position (G) into the interrogation position (A).

7. Lock cylinder (11) according to claim 5 or 6, wherein the interrogation gate (99) has an interrogation section (101) extending at least as far as an outer side of the cylinder core (19), wherein the locking pin (83) bears against the interrogation section (101) in the interrogation rotational position (C).

8. Lock cylinder (11) according to one of claims 5 to 7, wherein the cylinder core (19) is rotatable from the query rotational position (C) in the direction of the open position (O) into a blocking rotational position (B) when the query pin (77) is not in the query position (A), wherein the locking pin (83) is designed, when the query pin (77) is not in the query position (A), to engage a blocking receptacle (109) of the query link (99) due to its pretension when the cylinder core (19) is rotated from the query rotational position (C) into the blocking rotational position (B), wherein the blocking receptacle (109) has a blocking stop (111) for the locking pin (83), against which the locking pin (83) engaging in the blocking receptacle (109) strikes when the blocking rotational position (B) is reached.

9. Lock cylinder (11) according to claim 8, wherein the cylinder core (19) is rotatable from the blocking rotational position (B) into the closed position (G) when the interrogation pin (77) is not in the interrogation position (A).

10. Lock cylinder (11) according to claim 8 or 9, wherein the interrogation gate (99) has a return slope (105) along which the locking pin (83) can be guided out of the blocking receptacle (109) upon rotation of the cylinder core (19) from the blocking rotational position (B) in the direction of the closed position (G).

11. Lock cylinder (11) according to one of claims 5 to 10, wherein the cylinder core (19) is rotatable from the closed position (G) via the query rotational position (C) into the open position (O), or wherein the cylinder core (19) is rotatable from the closed position (G) along a first direction of rotation (D2) into the query rotational position (C) and from the query rotational position (C) along a second direction of rotation (D1) opposite to the first direction of rotation (D2) into the open position (O).

12. Lock cylinder (11) according to one of the preceding claims, wherein the permanent magnet (95) is designed to pull the locking pin (83) into the release position (F) against the pretension of the locking pin (83) when the interrogation pin (77) is in the interrogation position (A).

13. Lock cylinder (11) according to one of the preceding claims, wherein the associated key (23) can be inserted into the key channel (21) and removed from the key channel (21) in the closed position (G).

14. Locking cylinder (11) according to one of the preceding claims, wherein the interrogation pin (77) and the locking pin (83) as well as respective prestressing elements, in particular respective springs (79, 85), for generating the respective prestress can be pre-assembled in a mounting sleeve (89), wherein the cylinder core (19) has a mounting receptacle (113) into which the mounting sleeve (89) can be inserted.

15. Lock cylinder (11) according to one of the preceding claims, wherein the interrogation pin (77) can be urged into the interrogation position (A) by a coding elevation (125) arranged in an axial groove (51) extending from a key tip (91).

16. Lock cylinder (11) according to one of the preceding claims, wherein the lock cylinder (11) further comprises a coding device (39) which has a first axial stop (41) and a second axial stop (43) for the key (23), wherein the first axial stop (41) and the second axial stop (43) engage in the key channel (21) and wherein the second axial stop (43) is offset along the key insertion direction (E) relative to the first axial stop (41) to an axial end of the cylinder core (19) facing away from the key insertion opening (25), wherein the first axial stop (41) has a passage (45) for the passage of a coding elevation (125) formed on the associated key (23), and wherein the second axial stop (43) forms a stop for the coding elevation (125).

17. Lock cylinder (11) according to claim 16, wherein the coding device (39) and the interrogation pin (77) engage in the key channel (21) on mutually opposite key channel broad sides (27, 29).

18. Lock cylinder (11) according to claim 16 or 17, wherein the coding device (39) and the interrogation pin (77) are designed to cooperate with respective coding elevations (125) formed on mutually opposite key broad sides (115, 117) of the associated key (23).

19. Lock cylinder (11) according to one of claims 16 to 18, wherein the passage (45) has two lateral boundaries (47) offset from one another transversely to the cylinder rotation axis (D), through which the coding elevation (125) can be passed when the key (23) is inserted into the key channel (21).

20. Lock cylinder (11) according to claim 19, wherein end faces (49) of the limits (47) facing the key insertion opening (25) form the first axial stop (41).

21. Lock cylinder (11) according to claim 19 or 20, wherein outer surfaces of the boundaries (47) facing away from the passage (45) form an inner guide for a groove (51) formed on the associated key (23), in which the coding elevation (125) is formed.

22. Lock cylinder (11) according to one of claims 19 to 21, wherein the passage (45) is formed in the manner of an arch and wherein the first stop has a connecting section (53) by which the lateral boundaries (47) are connected to one another on a side of the first axial stop (41) facing away from the key channel (21).

23. Lock cylinder (11) according to one of claims 16 to 22, wherein the first axial stop (41) and the second axial stop (43) are formed on respective coding elements (56), in particular respective plates (57), inserted into the cylinder core (19).

24. Lock cylinder (11) according to claim 23, wherein the cylinder core (19) has a receptacle (59) for inserting the coding elements (56).

25. Lock cylinder (11) according to claim 24, wherein the receptacle (59) has a receiving opening (61) on an outer side of the cylinder core (19) through which the coding elements (56) can be inserted into the receptacle, wherein the inserted coding elements (56) extend radially to the outer side of the cylinder core (19) and have a curvature on the outer side corresponding to the cylinder core (19).

26. Lock cylinder (11) according to one of claims 16 to 22, wherein the coding device (39) comprises a one-piece coding element (63) on which the first axial stop (41) and the second axial stop (43) are formed.

27. Lock cylinder (11) according to claim 26, wherein the coding element (63) is formed on the cylinder core (19), in particular wherein the cylinder core (19) comprises two cylinder core halves (65, 67) (19), wherein the coding element (63) is formed on one of the two cylinder core halves (65, 67) (19).

28. Lock cylinder (11) according to claim 26 or 27, wherein the coding element (63) is designed in the manner of a fork (69) and has two extensions (71) which delimit the passage (45) and point in the direction of the key insertion opening (25), between which extensions the coding elevation (125) can be inserted into the fork (69), wherein the extensions (71) form the first axial stop (41) and wherein a receiving section (73) which connects the two extensions (71) on a side of the fork (69) facing away from the key insertion opening (25) forms the second axial stop (43).

29. Locking system (123) comprising a locking cylinder (11) according to one of the preceding claims and the associated key.

30. Locking system (123) according to claim 29, wherein the associated key (23) has an axial groove (51) extending from a key tip (91) in which a coding elevation (125) is arranged, wherein the coding elevation (125) is designed to urge the interrogation pin (77) into the interrogation position (A) when the key (23) is fully inserted into the key channel (21).

31. Locking system (123) according to claim 30, wherein the coding elevation (125) is formed free-standing in the groove (51).

32. Locking system (123) according to claim 30 or 31, wherein the coding elevation (125) has a recess (129) for engagement of the interrogation pin (77) on an interrogation surface facing in the direction of the interrogation pin (77) when the key (23) is inserted into the key channel (21).

33. Locking system (123) according to one of claims 30 to 32, wherein the associated key (23) is designed as a reversible key with an elongated key shaft (127) which has two mutually opposite key broad sides (115, 117) and two mutually opposite key narrow sides (119, 121 ), wherein the key (23) has on each of the key broad sides (1 15, 117) a respective groove (51 ) with a coding elevation (125) arranged therein.

34. Locking system (123) according to claim 33, wherein the locking cylinder (11) further comprises a coding device (39) which has a first axial stop (41) and a second axial stop (43) for the key (23), wherein the first axial stop (41) and the second axial stop (43) engage in the key channel (21) and wherein the second axial stop (43) is offset along the key insertion direction (E) relative to the first axial stop (41) to an axial end of the cylinder core (19) facing away from the key insertion opening (25), wherein the first axial stop (41) has a passage (45) for the passage of one of the two coding elevations (125), and wherein the second axial stop (43) forms a stop for the one coding elevation (125), wherein the other of the two coding elevations (125) of the associated key (23) is designed to urge the interrogation pin (77) into the interrogation position (A),when one coding elevation (125) rests against the second axial stop (43).

35. Key for use in a locking system (123) according to one of claims 29 to 34, wherein the key (23) is designed to sort the at least one tumbler (35) into the release configuration upon complete insertion into the key channel (21), and wherein the key (23) has a coding elevation (125) which is designed to urge the interrogation pin (77) into the interrogation position (A) upon complete insertion of the key (23) into the key channel (21).

36. Key according to claim 35, wherein the coding elevation (125) is arranged in an axial groove (51) extending from a key tip (91), in particular free-standing.

37. Key according to claim 35 or 36, wherein the coding elevation (125) has a recess (129) for engagement of the interrogation pin (77) on an interrogation surface facing in the direction of the interrogation pin (77) when the key (23) is inserted into the key channel (21).

38. Key according to one of claims 36 or 37, wherein the key (23) is designed as a reversible key with an elongated key shank (127) which has two mutually opposing key broad sides (115, 117) and two mutually opposing key narrow sides (119, 121), wherein the key (23) has on each of the key broad sides (115, 117) a respective groove (51) with a coding elevation (125) arranged therein.

Images