EP3933152A1 - Lock cylinder, locking device, locking system, key and key blank - Google Patents

Abstract

In a lock cylinder with a cylinder housing, a cylinder core and several tumblers, the following is provided: that the cylinder core is mounted in the cylinder housing so that it can rotate about a cylinder axis and has a key channel, which extends parallel to the cylinder axis into the cylinder core, for the key shank of a key assigned to the lock cylinder; in that the key channel has an oblong cross-section with two narrow sides which are opposite to each other with respect to a first transverse direction and with two wide sides which are opposite with respect to one another with respect to a second transverse direction; and that the tumblers partially protrude into the key channel and are designed to block the cylinder core from rotating out of the normal position when the cylinder core is in a normal position, unless they are arranged in a configuration that releases the cylinder core, in particular by the associated key. It is further provided: that the lock cylinder includes a coding element and the cylinder core has a receptacle for the coding element, which extends transversely to the cylinder axis into the cylinder core and partially overlaps with the key channel; and that the coding element, when inserted into the receptacle, is designed to engage in the key channel with a stop section on one of the two narrow sides in order to form a stop for limiting the insertion of the key shank of the associated key into the key channel to a correct insertion depth , and engage in the key channel with a coding section on one of the two broad sides in order to code a permissible profiling of the key shank.

Description

The invention relates to a lock cylinder with a cylinder housing; a cylinder core which is rotatably mounted in the cylinder housing about a cylinder axis and has a key channel extending parallel to the cylinder axis in the cylinder core for the key shaft of a key assigned to the lock cylinder; and several tumblers that partially protrude into the keyway and are designed to lock the cylinder core in a normal position of the cylinder core relative to the cylinder housing against turning from the normal position, provided that they are not in a configuration that releases the cylinder core, in particular by the assigned key are arranged.

The invention further relates to a locking device which comprises such a lock cylinder and at least one key assigned to the lock cylinder; a locking system with such a locking device; a key for use with such a lock cylinder, in such a locking device or in such a locking system; and a key blank for producing such a key.

Such a lock cylinder or a locking device or a locking system with such a lock cylinder can be designed for use in doors, for example. The tumblers, which can in particular be at least partially received and movably mounted in the cylinder housing, largely ensure that the cylinder core can only be rotated by means of the assigned key. The tumblers can be used for this purpose an interface (also referred to as a shear line) extend between the cylinder core and the cylinder housing, thereby blocking rotation of the cylinder core relative to the cylinder housing as long as they are not placed in said releasing configuration by the associated key.

The releasing configuration can in particular be defined in that in this configuration none of the tumblers extends beyond the interface between the cylinder core and the cylinder housing or, in the case of multi-part tumblers, a joint between separate parts of the tumbler coincides with the interface. In order to put the tumblers in the releasing configuration, the key shaft (also called "key bit" according to the DIN EN 1303 standard) of the assigned key can have a coding structure which, when the key shaft is inserted into the key channel up to the correct insertion depth, the tumblers charged accordingly. The tumblers can in particular be pin tumblers or plate tumblers.

So that the key can interact with the tumblers, although they are arranged in the interior of the lock cylinder with as little access as possible from the outside, the cylinder core has the aforementioned key channel. The key shaft of the key can then be inserted into the key channel in order to act on the tumblers directly. The way in which the key shaft must be designed in order to act on the tumblers in such a way that they are arranged in the releasing configuration represents the locking secret of the lock cylinder. In particular, it can be provided that the key shaft of the key assigned to the lock cylinder has a certain coding structure, for example, drill hollows or notches, which is designed according to the locking code, so in such a way that the tumblers of the lock cylinder can be arranged in the releasing structure by applying the coding structure (with correct relative arrangement).

The number of possible locking secrets that a certain lock cylinder can have by permuting the variable coding features is limited in particular by the type and number of tumblers. With the number of possible locking secrets, however, the security of the locking cylinder increases, since the respective locking secret becomes more and more specific and it becomes increasingly unlikely to guess it through trial and error. It is therefore desirable to increase the number of possible locking secrets.

The security of a locking cylinder can also be limited by the fact that the locking secret is coded by a single mechanism, for example only by tumblers. This means that an attempt to overcome the locking secret (e.g. by manually setting the individual tumblers with a special tool; so-called lock picking) can be limited to this mechanism. If, on the other hand, the coding of the key secret in the lock cylinder is distributed over several mechanisms of different types, it is necessary for a break in attempt to use different techniques to overcome all mechanisms, which makes breaking open more difficult, especially if the various mechanisms are also in different places in the Lock cylinder are provided. It is therefore desirable to encode the locking secret of the lock cylinder by means of several different mechanisms.

It is an object of the invention to provide a lock cylinder, a lock device, a lock system, a key or a key blank, each of the type mentioned at the beginning, which provides improved security, in particular with regard to the number of possible locking secrets and the type of coding of the respective locking secret.

The object is achieved by a lock cylinder with the features of claim 1, by a locking device with the features of claim 6, by a locking system with the features of claim 11, by a key with the features of claim 12 or by a key blank with the Features of claim 14.

Advantageous developments of the invention emerge from the dependent claims, the present description and the figures.

The lock cylinder according to the invention comprises a cylinder housing; a cylinder core, which is rotatably mounted in the cylinder housing about a cylinder axis and has a key channel extending parallel to the cylinder axis in the cylinder core for the key shaft of a key assigned to the lock cylinder, the key channel having an elongated cross section with two narrow sides, which with respect to a first transverse direction to each other are opposite, and with two broad sides which are opposite to one another with respect to a second transverse direction; and several tumblers that partially protrude into the keyway and are designed to lock the cylinder core in a normal position of the cylinder core relative to the cylinder housing against turning from the normal position, unless they are in a configuration that releases the cylinder core, in particular by the assigned key are arranged.

The key channel is advantageously designed specifically so that the key shaft of the assigned key can be inserted into the key channel; or vice versa: the key shaft of the assigned key is advantageously specifically designed to be in the Key channel can be introduced. For this purpose, the key channel and the key shaft expediently have cross-sections corresponding to one another, in particular at least substantially complementary to one another. As a result, when the key shaft is inserted into the keyway of the cylinder core, the key is guided along the cylinder axis in order to reliably assume the position in which it arranges the tumblers in the releasing configuration when the correct insertion depth is reached.

For this purpose, it is particularly expedient if the keyway has the above-mentioned elongated cross section with two narrow sides and two broad sides with respect to the cylinder axis, which are each opposite to one another transversely to the cylinder axis. The direction in which the two narrow sides are opposite to each other defines a first transverse direction oriented transversely to the cylinder axis, and the direction in which the two broad sides are opposite to each other defines a second transverse direction oriented transversely to the cylinder axis . Here as well as in the following, transverse is to be understood in particular as perpendicular.

The designation of the transverse directions as first and second transverse direction is only used to distinguish between the terms and is not intended to imply any sequence or preferred direction. The designation of the sides as narrow side or broad side is to be understood, however, that the width of both narrow sides, ie their extension along the mentioned second transverse direction, at least not greater, preferably smaller than the width of both broad sides, ie their extension along the mentioned first Transverse direction is.

Each edge of the two-dimensional cross section of the key channel corresponds to a surface of the three-dimensional shape of the key channel, the cross section of which preferably at least substantially along its extension in the direction the cylinder axis is constant. In the following, both the edge of the two-dimensional cross-section and the corresponding surface of the three-dimensional shape of the keyway are referred to as the narrow side or broad side, whereby the context determines whether the edge (narrow side or broad side of the cross-section) or the surface ( Narrow side or broad side of the keyway) is meant.

In particular, the cross section can be at least substantially rectangular, so that the key channel has at least approximately (for example, when it is approximated by its convex shell) the shape of a flat cuboid. In this case, the two narrow sides are aligned parallel to the second transverse direction and the two broad sides are aligned parallel to the first transverse direction; in addition, on the one hand, the two narrow sides below one another and, on the other hand, the two broad sides have at least substantially the same width. The corners of the rectangular shape or the edges of the cuboid shape at the transition between a respective narrow side and a respective broad side can be rounded or have a bevel.

The broad sides can have at least essentially a flat surface. Such a design can be useful, for example, for lock cylinders whose associated keys are dimple keys. The broad sides can, however, also have steps or obliquely oriented sections, so that the cross section of the key channel (and correspondingly the cross section of the key shaft) can appear, for example, jagged and / or stepped. Furthermore, it can be advantageous to make the cross section point-symmetrical so that the assigned key can be inserted into the keyway in two positions which differ by rotating 180 ° around an axis parallel to the cylinder axis.

According to the invention it is provided that the lock cylinder comprises a coding element and that the cylinder core has a receptacle for the coding element, which extends transversely to the cylinder axis, in particular parallel to the first transverse direction, in the cylinder core and partially overlaps with the key channel. The receptacle thus forms a receiving space for the coding element. In particular, the receptacle is designed to receive the coding element; or vice versa: the coding element is designed to be inserted into the receptacle.

Preferably, when the coding element is inserted into the receptacle, i.e. received therein, is at least essentially, in particular only apart from remaining play, immovably captured in the receptacle at least with respect to a direction parallel to the cylinder axis, preferably in all directions. The receptacle can be designed to be at least essentially complementary to the coding element, for example insofar as the cross-sections of the coding element and the receptacle at least essentially correspond to one another with respect to the cylinder axis and / or as one or more, preferably all, side surfaces of the Coding element each rest on a side surface of the receptacle aligned perpendicular to the cylinder axis and / or vice versa.

Since the receptacle for the coding element extends into the cylinder core, that is, from the outside into the interior of the cylinder core, the coding element can easily be inserted from the outside into the receptacle and thus into the cylinder core. The receptacle extends so far into the cylinder core that part of the receptacle overlaps the keyway. The recording extends into or even through part of the key channel. As a result, the receptacle opens into the key channel in the region of its extension along the cylinder axis along a section of the contour of the cross section of the key channel. This section preferably comprises one of the two narrow sides of the Cross-section complete and at least one section of one of the two broad sides of the cross-section adjoining the narrow side; more preferably, the section additionally also comprises a section of the other of the two broad sides which adjoins the narrow side.

Furthermore, it is provided according to the invention that the coding element is designed, when it is inserted into the receptacle, to engage on one of the two narrow sides with a stop section in the key channel in order to have a stop for limiting the insertion of the key shaft of the assigned key into the key channel to form a correct insertion depth, and to engage in the key channel on at least one of the two broad sides with a coding section in order to code a permissible profile of the key shaft.

The coding element can be designed primarily with regard to its shape in the manner mentioned for the purposes mentioned, in particular with regard to the shape of those sections of the coding element which, when inserted into the receptacle, are located in the part of the receptacle that overlaps the key channel, i.e. within of the key channel are arranged and thus intervene in the key channel. The remaining sections of the coding element, on the other hand, can be designed primarily with a view to reliable mounting of the coding element in the receptacle, in particular by at least substantially completely filling that part of the receptacle that does not overlap with the keyway.

According to the invention, one of the sections of the coding element that engages the key channel when the coding element is inserted forms a stop section of the coding element which serves as a stop to limit the insertion of the key shaft of the key assigned to the lock cylinder into the key channel to a correct insertion depth. The correct insertion depth is the depth to which the key shaft of the assigned key must be inserted into the key channel so that it arranges the tumblers of the cylinder core in the releasing configuration.

The stop section of the coding element functions as such a stop in particular insofar as when the coding element is inserted into the receptacle it comes to lie within the key channel in such a way that when the key shaft of the associated key is inserted into the key channel, a stop section formed on the key shaft is reached the correct insertion depth strikes it and thereby prevents the key shaft from being inserted even deeper into the keyway. In this way, the coding element can be used to enable the correct positioning of the key for releasing the cylinder core in the first place, or at least to contribute to precise positioning. The stop section of the coding element and / or the stop section of the key shaft is preferably formed (in each case) by a stop surface which is oriented perpendicular to the cylinder axis.

When the coding element is inserted into the receptacle, the stop section of the coding element engages in one of the two narrow sides of the keyway and in this respect extends over at least part of this narrow side. The stop section preferably extends over the entire width of the narrow side, i.e. over its entire extent along said second transverse direction.

By means of the coding element, the lock cylinder can be restricted to the fact that of several keys, each of which is fundamentally suitable, in particular due to a corresponding coding structure, for setting the tumblers of the lock cylinder in the releasing configuration, only those of these keys are exactly up to the one for the Move to the releasing configuration correct insertion depth can be introduced into the cylinder core, which have a stop section for stopping at the stop section of the coding element at the corresponding point. Keys which instead already strike the stop section of the coding element with the tip or with a front side of the key shaft aligned in the direction of insertion do not reach the correct insertion depth and can therefore be excluded from actuation of the lock cylinder by the coding element. In addition, the coding element can also ensure that keys that have no stop section that strikes the stop section of the coding element or that have a stop section that hits the stop section of the coding element too early or too late (i.e. when the correct insertion depth has not yet been reached or has already been exceeded), are not suitable for actuating the cylinder core, since the correct insertion depth cannot be reached or, in any case, cannot be reliably found.

Another of the sections of the coding element which engage in the key channel when the coding element is inserted forms, according to the invention, a coding section which engages in one of the two broad sides of the key channel. The coding section preferably extends over only part of the entire width of the broad side, i.e. its extent along the first transverse direction mentioned, and / or engages the key channel to different extents along the second transverse direction in different partial areas of the broad side. This is particularly advantageous with regard to the function of the coding element to code a permissible profile of the key shaft.

The coding of the permissible profiling of the key shaft consists at least essentially in the fact that the cross section of the key channel in the area of the broad side on which the coding section engages in the key channel is constricted by this engagement in such a way that only one key, the key shaft of which has at least one front section in a corresponding, is profiled in a way that is complementary in particular to the coding section, with this front section it can be inserted past the coding section to the correct insertion depth into the key channel. The front section, over which the profiling must at least extend, extends from a tip of the key shaft (ie the free end of the key shaft with which the key shaft is first inserted into the keyway) at least up to a distance from the tip, which corresponds to the distance between the tip and the receptacle of the cylinder core with the coding element inserted therein when the key shaft is inserted into the key channel to the correct insertion depth.

A reduction in the cross section of the key shaft in the aforementioned front section is called profiling. Profiling that is permissible in relation to a specific coding element is particularly relevant when its shape at least essentially corresponds to the shape of the constriction of the cross-section of the key channel through the coding section (or possibly several coding sections) of this coding element, so that the key shaft during the introduction into the key channel can be guided past the coding section (or coding sections) with this profiling.

The profiling can, for example, possibly among other things, be formed by one or more grooves or grooves formed in the key shaft, in particular at least in the aforementioned front section of the key shaft, which run parallel to one another and, when the key shaft is inserted in the key channel, preferably also parallel to the cylinder axis . When the key shaft is inserted into the key channel, the coding section of the coding element can then engage in the respective groove or groove and run through it from the tip of the key shaft until the correct insertion depth is reached. The profiling is in particular at least on that broad side of the key shaft is provided, which corresponds to the broad side of the key channel on which the coding portion of the coding element engages in the key channel.

By means of the coding element, the lock cylinder can therefore be restricted to the fact that of several keys, each of which would be suitable in principle, in particular due to a corresponding coding structure, to set the tumblers of the lock cylinder in the releasing configuration, only those of these keys up to the one for the Shifting into the releasing configuration, the correct insertion depth can be introduced into the cylinder core, which have a permissible, preferably complementary, profiling that corresponds to the coding element, in particular to its coding section. Whether the lock cylinder can be operated by means of a key, in addition to the locking secret coded by the tumblers, can also depend on whether the key shaft of the key has a permissible profile, which in turn depends on the design of the coding element. Thus, the key secret for actuating the lock cylinder can be supplemented by a part that can be specified by the coding element and, when using several different coding elements, can also be set or changed.

By using the coding element or a corresponding design of the assigned key, the number of possible locking secrets that can be set on the lock cylinder is consequently increased. Because then not only can the tumblers be permuted, but the coding element can optionally be inserted into the receptacle of the cylinder core or not. In addition, various coding elements can be provided, one of which can optionally be inserted into the receptacle. In addition, the cylinder core of the lock cylinder can have two or more, in particular essentially identical, receptacles of the type mentioned, which differ with regard to their position along the cylinder axis, so that the coding element or a respective coding element can optionally be inserted into one of the receptacles, whereby the position of the stop to limit the insertion of the key shaft of the assigned key into the key channel varies to a correct insertion depth and the number of possible locking secrets can thus be increased even further.

It is also advantageous that, as a result of the design according to the invention, the locking secret is distributed over several mechanisms, namely on the one hand the interaction of a coding structure of the key with the tumblers and on the other hand the guided positioning of the key up to the correct insertion depth in the interaction of the stop section and the profiling of the key with the coding element. As a result of these effects, the security of the lock cylinder is consequently improved in several ways. The two advantageous functions of a stop located within the cylinder core on the one hand and an additional coding of a permissible profile on the other hand are realized by a single element, namely by the coding element, and thus in a particularly simple manner.

The coding section and the stop section of the coding element can in principle at least partially overlap. Preferably, however, the coding section and the stop section of the coding element are disjoint, and they can adjoin one another. In addition to its mentioned function of encoding a permissible profile of the key shaft, the coding section can at the same time also form a further stop to limit the insertion of the key shaft of the associated key into the key channel to a correct insertion depth and, in this respect, as an additional stop section to the mentioned stop section of the coding element act.

By engaging the stop section as well as by engaging the coding section of the coding element in the key channel, the cross section of the key channel is narrowed or constricted in the area along the cylinder axis in which the receptacle is arranged and overlaps with the key channel. This constriction takes place advantageously both along the first transverse direction, namely by the stop section, which engages in the key channel on a narrow side, and along the second transverse direction, namely by the coding section, which engages in the key channel on a broad side. In this way, the constriction can be bypassed comparatively more difficult, since a duplicate key, for example, has to be machined precisely from two different directions in order to be adapted to the constriction. The security can consequently be improved even further if the cross section of the key channel in the area of the receptacle is even narrowed from three sides.

In particular in this context, an embodiment is therefore particularly preferred in which it is provided that the coding element has two coding sections and is designed for this when it is inserted into the receptacle, with one of the coding sections on one of the two broad sides and with the other of the Encoding sections on the other of the two broad sides to engage in the key channel in order to encode a permissible profiling of the key shaft. The permissible profiling can then accordingly be distributed over the two broad sides of the key shaft that correspond to the broad sides of the key channel. If the lock cylinder is designed so that the associated key can be a reversible key, i.e. in two positions that differ by rotating 180 ° around an axis parallel to the cylinder axis, it can be inserted into the key channel to lock the tumblers in the releasing To arrange configuration, then the coding sections are preferably designed and arranged in such a way that their interaction with the two-sided Profiling the key shaft does not conflict with this property of the key as a reversible key.

With regard to the second transverse direction, the coding element thus forms a one-sided or even two-sided constriction of the key channel. If a plurality of coding sections are provided, the coding sections (in the case of more than two coding sections, in particular in pairs) can be designed mirror-symmetrically to one another with regard to their shape and / or arrangement. In particular, the coding element as a whole can also be designed with mirror symmetry, the mirror plane of this mirror symmetry preferably being aligned parallel to the cylinder axis when the coding element is inserted in the receptacle. The cylinder axis then preferably lies in this mirror plane.

According to an advantageous embodiment, the receptacle can be designed in the form of a slot and extend along a plane perpendicular to the cylinder axis. For example, such a receiving slot can be formed as an incision, preferably of constant thickness (i.e. constant extension along the cylinder axis), in the cylinder core. This enables simple production of the receptacle and simple insertion of the coding element into the receptacle. In addition, a small axial extension of the receptacle has the advantage that the receptacle does not hinder the arrangement of the tumblers in the cylinder core.

The cross section of the receptacle perpendicular to the cylinder axis can in particular be in the shape of a segment of a circle, the overlap of the receptacle with the keyway being included in the cross section. The segment height of the circular segment is preferably smaller than the radius of the cylinder core and preferably larger than half the extent of the bowl channel along the first transverse direction.

According to an advantageous embodiment, the coding element can be designed in the form of a plate. It preferably has a constant thickness. Such a coding element can advantageously be produced simply by punching. As an alternative to this, it can also be provided that the coding element is or will be manufactured, for example, by a casting process, with a 3D printer or by erosion, these manufacturing methods not being limited to platelet-shaped coding elements.

The cross section of the coding element is preferably at least approximately (for example, when approximated by its convex shell) in the shape of a segment of a circle, the corners at the transition between the circular arc and the circular chord of the circular segment shape being rounded or being able to have a bevel. The segment height of the circular segment is preferably smaller than the radius of the cylinder core and preferably larger than half the extent of the bowl channel along the first transverse direction. If the receptacle is also designed in the shape of a segment of a circle, the shape of the segment of a circle of the receptacle and the shape of the segment of a circle of the coding element preferably correspond to one another.

According to a further advantageous embodiment, the coding element can have a recess with a contour, the stop section corresponding to a section of the contour and the coding section corresponding to another section of the contour. If the coding element has the shape of a segment of a circle, the recess can in particular be provided on the chord of the circle segment, that is to say extend in particular from the chord into the coding element. If the coding element is produced by punching, the coding element with the recess can advantageously be formed in a single punching step.

The contour of the recess is the course of the edge of the recess in relation to its cross section, which is aligned parallel to the platelet plane in the case of a plate-shaped coding element and perpendicular to the cylinder axis when the coding element is inserted into the receptacle. The fact that the stop section corresponds to a section of the contour means in particular that the stop section is delimited by this section of the contour in the direction away from the narrow side of the key channel at which the stop section engages the key channel, i.e. at least essentially parallel to the first transverse direction . The fact that the coding section corresponds to a section of the contour means in particular that the coding section is delimited by this section of the contour in the direction away from the broad side of the key channel at which the coding section engages the key channel, i.e. at least essentially parallel to the second transverse direction .

The coding section can in particular be formed by a projection of the contour, that is to say correspond to the section of the contour which forms the projection in the aforementioned sense. The section of the contour that forms the projection protrudes in relation to an adjacent section of the contour in the direction of the free space of the recess. If the contour of the recess has such a projection, the shape of the free space of the recess is consequently concave. In order to be able to move past a respective coding section, the key shaft of the assigned key can then have a concave profile in a corresponding manner. If the coding element has a plurality of coding sections, each of these coding sections can each be formed by a respective projection of the contour.

According to an advantageous embodiment, it can be provided that the stop section and the coding section, preferably all of the coding sections provided on the coding element, are arranged at a distance from one another. These sections of the coding element are then not only disjoint to one another, but rather also do not border on each other. In this way, the stop section and the coding section or the coding sections of the coding element can interact better with a respective structure formed on the key shaft of the associated key, for example, stop against a stop surface or engage in a groove or groove.

The locking device according to the invention comprises a locking cylinder according to the invention, which can be designed in one or more of the ways explained above, as well as at least one key assigned to the locking cylinder. The key shaft of the key extends along a key insertion direction and has an elongated cross section with two narrow sides that are opposite to each other transversely to the key insertion direction, and with two broad sides that are opposite to each other transversely to the key insertion direction. In particular, the key shaft can have at least essentially the shape of a flat parallelepiped, so that its cross section is at least essentially rectangular.

When the key shaft is or is inserted into the key channel, the key insertion direction is aligned parallel to the cylinder axis. The narrow sides of the key shaft are then opposite to each other corresponding to the narrow sides of the key channel with respect to the said first transverse direction, and the broad sides of the key shaft are then opposite to each other corresponding to the broad sides of the key channel with respect to the said second transverse direction.

According to the invention, the key shaft of the key of the locking device, preferably on at least one of its broad sides, has a coding structure which is designed to arrange the tumblers in the releasing configuration when the key shaft is inserted into the key channel up to the correct insertion depth. The coding structure can be, for example Act dimples. The coding structure preferably includes structures formed not only on one of the two broad sides, but on both broad sides, for example the cited drill holes. The key shaft can advantageously be rotationally symmetrical with respect to an axis of symmetry parallel to the key insertion direction. In principle, however, the coding structure can also be provided on one of the narrow sides, for example in the form of notches formed in the narrow side.

In addition, the key shaft has the aforementioned profiling, which is designed in such a way that the key shaft, in particular only due to this profiling, can be guided past the coding section or sections of the coding element inserted into the receptacle of the cylinder core at least so far when it is inserted into the key channel, that it reaches the correct insertion depth.

According to an advantageous embodiment, said profiling of the key shaft comprises a groove or groove which is complementary to the coding section of the coding element and which is formed in one of the broad sides of the key shaft. If the coding element has a plurality of coding sections, said profiling can comprise a corresponding number of grooves or grooves in a corresponding arrangement. Due to the complementary design, the coding section, which engages in the groove or groove when the key shaft is inserted into the key channel, is guided particularly reliably relative to the profiling through the groove or groove.

The groove or groove preferably has a straight course, which can in particular be aligned parallel to the key insertion direction. In principle, however, the groove or groove can also have a curved course or a course oriented obliquely to the key insertion direction, so that the coding element when the key shaft is inserted into the key channel as a result of the engagement of the Coding section is offset in the groove or groove transversely to the cylinder axis in the receptacle. In this way, the coding element can act as a kind of additional tumbler, which initially protrudes from the receptacle over the interface between the cylinder core and the cylinder housing and thereby locks the cylinder core against rotating relative to the cylinder housing, then by inserting the key into the cylinder core but is moved in such a way that this blocking is lifted.

According to an advantageous embodiment, the key shaft has one or more stop sections which, in particular with regard to their position on the key shaft, are designed to, when the key shaft is inserted into the key channel of the cylinder core, when the correct insertion depth is reached on a section, in particular the stop section or to strike the coding section of the coding element inserted into the receptacle. By striking, the introduction of the key shaft into the key channel is advantageously limited to the correct insertion depth in which the key shaft arranges the tumblers in the releasing configuration. If more than one such stop section is provided on the key shaft, all stop sections formed on the key shaft are preferably arranged in the same plane perpendicular to the key insertion direction.

In particular, one of the stop sections of the key shaft can be designed as a stop surface which is oriented perpendicular to the key insertion direction and which is formed by a step in one of the narrow sides of the key shaft. The stop surface is the surface that connects the two levels of the step. In particular, if a coding structure of the key shaft, which interacts with the tumblers of the lock cylinder, is designed as notches in a narrow side, the step is preferably designed on the opposite narrow side, also referred to as the back of the key. The mentioned grooves and / or grooves can differ with respect to the key insertion direction extend from the tip of the key shaft in particular at least up to the step, that is to say in the axial direction up to the level of the step.

Furthermore, it is preferred that the step is set back relative to the tip of the key shaft with respect to the key insertion direction, that is to say in particular not formed by a front side of the shape of the key shaft. For example, the step from the tip of the key shaft can have a distance along the key insertion direction which corresponds to at least one tenth, in particular at least one eighth, of the length of the key shaft, i.e. the extension of the key shaft along the key insertion direction. In addition, the distance is preferably less than half, in particular less than a third, of the length of the key shaft.

Furthermore, one of the abovementioned stop sections of the key shaft can be designed as an end face oriented perpendicular to the key insertion direction, up to which the said profiling extends from a tip of the key shaft. This tip is the free end of the key shaft which is oriented in the key insertion direction, so that the key shaft is designed to be inserted into the key channel of the lock cylinder with the point first. If the abovementioned stop section formed by a step in one of the narrow sides of the key shaft is also provided, the present stop section is not the same stop section but a separate further stop section, but preferably in the same plane perpendicular to the key insertion direction how the aforementioned stopper portion is arranged.

The stop section formed by the end face, like the profiling, is preferably formed in one of the broad sides of the key shaft. Such a stop section is preferably in each case in both broad sides of the key shaft intended. Said end face can in particular define an end of a respective groove or groove of the profiling, up to which the groove or groove can extend starting from the tip of the key shaft. In this case, the groove or groove extends exclusively over part of the length of the key shaft. In particular, this can also apply to the profiling as a whole.

If the key is designed as a reversible key, the stop sections, in particular two steps on the narrow sides of the key shaft and / or two end faces of profiles on the broad sides of the key shaft, can be provided in an arrangement that is rotationally symmetrical with respect to a rotation of 180 ° around the key axis.

According to an advantageous embodiment it is provided that the only cylinder-side effective stops of the locking device to limit the insertion of the key shaft of the assigned key into the key channel of the cylinder core to the correct insertion depth are formed on the coding element, in particular by the stop section and optionally one or more additional stop sections and / or the coding section and optionally one or more further coding sections of the coding element are formed.

In particular, the respective stop sections of the coding element and the key shaft can be arranged relative to one another in such a way that when the key shaft is inserted into the key channel, they strike against each other before a shaft widening, a transition between the key shaft and a key head of the key or the key head itself against the outside Cylinder core or against the cylinder housing.

Due to the fact that, in addition to the abovementioned stop sections, no further stops are effective in the locking device to limit the introduction of the key shaft into the key channel, the key advantageously only strikes the lock cylinder within the key channel during insertion. The fact that there is no reference point for the correct insertion depth outside of the lock cylinder has the advantage that the production of a duplicate key is made more difficult.

The locking system according to the invention comprises a locking device of the type mentioned, which can be designed in at least one of the ways set out above. In this case, however, the locking system comprises not just one coding element and only one assigned key, but several different coding elements of the type mentioned, which differ in terms of their coding sections, as well as several different assigned keys, which differ in terms of the profiles of their key shafts. The coding elements can differ in particular with regard to the number, the shape and / or the position of their respective coding sections.

The various keys are all keys assigned to the lock cylinder of the locking system insofar as each of them is basically suitable for actuating the lock cylinder. In particular, it can be provided that all assigned keys are then inserted with their key shank up to the correct insertion depth into the key channel of the lock cylinder and thereby put the tumblers of the lock cylinder into the releasing configuration when none of the coding elements is inserted into the receptacle. For this purpose, all assigned keys can in particular have the same coding structure.

According to the invention it is further provided in the locking system that for each coding element at least one corresponding to the coding element assigned key is provided, as on the key shaft a corresponding to the coding section or the coding sections of this coding element, in particular complementary to the coding section or the coding sections, profiling is formed, so that optionally one of the coding elements can be inserted into the receptacle of the cylinder core to thereby the To restrict the introduction of the key into the cylinder core to the associated key corresponding to this coding element. Since only the key shafts of those assigned keys that also have a profile corresponding to the coding sections of the respective coding element used can be inserted up to the correct insertion depth into the key channel of the cylinder core, the number of possible locking secrets in such a locking system can correspond to the number of different coding elements be multiplied.

The key according to the invention is for use with a lock cylinder of the type mentioned, which can be designed in particular in at least one of the ways set out above, for use in a locking device of the type mentioned, which can be designed in particular in at least one of the ways set out above, or for Use in a locking system of the type mentioned, which can in particular be designed in at least one of the ways set out above. The key comprises a key shaft which extends along a key insertion direction and has an elongated cross section with two narrow sides that are opposite to one another transversely to the key insertion direction and with two broad sides that are opposite to one another transversely to the key insertion direction.

Furthermore, the key shaft of the key, preferably on at least one of its broad sides, has a coding structure which is designed to arrange the tumblers of the lock cylinder in the releasing configuration when the key shaft is up to a correct insertion depth in the key channel of the cylinder core of the lock cylinder is inserted, and a stop section which is designed as a stop surface oriented perpendicular to the key insertion direction and formed by a step in one of the narrow sides of the key shaft in order to ensure that the correct insertion depth is reached when the key shaft is inserted into the key channel To strike the stop section of the coding element of the lock cylinder inserted into the receptacle. Furthermore, it is provided according to the invention that the key shaft of the key has a profile, in particular in the form of at least one groove and / or groove, which is formed in one of the broad sides of the key shaft and extends from a tip of the key shaft with respect to the key insertion direction at least up to the Step extends so that when the key shaft is inserted into the key channel, the profiled section of the key shaft can be guided past the coding section of the coding element of the lock cylinder inserted into the receptacle.

For these features and properties of the key and in particular of the key shaft of the key, the above explanations on corresponding features and properties as well as the resulting advantages of the key assigned to the lock cylinder according to the invention, the key of the locking device according to the invention or the key of the locking system according to the invention apply accordingly. In particular, the key shaft of the key can be designed to be rotationally symmetrical with respect to an axis parallel to the key insertion direction.

Furthermore, the profiling can in particular be designed so that, while the section of the key shaft having the profiling is guided past the coding section of the coding element of the lock cylinder, the coding section engages the profiling and runs through it. In other words, while the coding section engages in a groove or groove in the profiling, for example, it is moved along the profiling. The coding section must have the profiling not necessarily run through to the end. Preferably, however, the profiling extends as far as an end section designed as an end surface oriented perpendicular to the key insertion direction, which forms a further stop section of the key shaft and with which the key shaft strikes the coding section of the coding element when the correct insertion depth is reached.

The blank according to the invention is designed for the production of a key of the type mentioned, which in particular can be designed in at least one of the ways set out above. The key blank comprises a key shaft which extends along a key insertion direction and has an elongated cross section with two narrow sides that are opposite to each other transversely to the key insertion direction and with two broad sides that are opposite to each other transversely to the key insertion direction. Furthermore, the key shank of the key blank has a stop section which is designed as a stop surface oriented perpendicular to the key insertion direction and formed by a step in one of the narrow sides of the key shank, so that when the key shank is inserted into the key channel when the correct insertion depth is reached at the stop section of the coding element of the lock cylinder inserted into the receptacle. Furthermore, it is provided according to the invention that the key shaft of the key blank has a profile, in particular in the form of at least one groove and / or groove, which is formed in one of the broad sides of the key shaft and extends from a tip of the key shaft with respect to the key insertion direction at least up to the Step extends so that when the key shaft is inserted into the key channel, the profiled section of the key shaft can be guided past the coding section of the coding element of the lock cylinder inserted into the receptacle.

For these features and properties of the key blank and in particular of the key shaft of the key blank, the above explanations on the corresponding features and properties as well as the resulting advantages of the key according to the invention, the key assigned to the lock cylinder according to the invention, the key of the locking device according to the invention or the key of the locking system according to the invention apply accordingly. The key blank differs from the key essentially, in particular exclusively, in that it does not (yet) have the coding structure through which the tumblers are arranged in the releasing configuration when the key shaft is inserted into the key channel to the correct insertion depth .

Both with regard to the key and with regard to the key blank, in some embodiments it can be provided that the profiling of the key shaft, in particular the groove and / or groove, extends essentially only up to the level of the respective step on the narrow side of the key shaft. Here, an end face of the profiling can be arranged exactly at the (axial) height of the step, with both the step and the end face being able to form a respective stop section (in particular a stop face) for inserting the key shaft into the keyway of a cylinder core. However, this is not absolutely necessary, but an end face of the profile can also be offset slightly in or against the key insertion direction relative to the step along the axis of the key shaft, so that only the step or the end face of the profile forms a stop section. In all of these cases, the limited length of the respective profiling on the broad side of the key shaft can ensure that the coding structure, in particular an arrangement of dimples, can be attached to a substantial part of the broad side of the key shaft without impairment. In particular, this avoids that the profiling The recess formed on the broad side restricts the coding options with regard to the tumblers of the lock cylinder.

Fig. 1

zeigt in einer vereinfachten Darstellung eine Ausführungsform eines erfindungsgemäßen Schließzylinders zusammen mit einem erfindungsgemäßen zugehörigen Schlüssel bzw. eine Ausführungsform einer erfindungsgemäßen Schließvorrichtung.

Fig. 2 und 3

zeigen unterschiedliche Ausführungsformen des Kodierelements eines erfindungsgemäßen Schließzylinders bzw. verschiedene Kodierelemente einer Ausführungsform eines erfindungsgemäßen Schließsystems.

Fig. 4 und 5

zeigen jeweils das Kodierelement und den zugehörigen Schlüssel, die auch in Fig. 1 gezeigt sind, bzw. ein Kodierelement und eine Ausführungsform eines entsprechenden erfindungsgemäßen Schlüsselrohlings aus zwei unterschiedlichen Blickrichtungen und in zwei unterschiedlichen relativen Anordnungen zueinander.

In the following, the invention is explained in more detail using the figures, merely by way of example.

Fig. 1

shows in a simplified representation an embodiment of a lock cylinder according to the invention together with an associated key according to the invention or an embodiment of a locking device according to the invention.

Figs. 2 and 3

show different embodiments of the coding element of a lock cylinder according to the invention or different coding elements of an embodiment of a locking system according to the invention.

Figures 4 and 5

each show the coding element and the associated key, which are also used in Fig. 1 are shown, or a coding element and an embodiment of a corresponding key blank according to the invention from two different viewing directions and in two different relative arrangements to one another.

In Fig. 1 an embodiment of a lock cylinder 11 according to the invention is shown in a simplified representation. The illustration is particularly simplified in that only the cylinder core 13 and coding element 15 of the lock cylinder 11 are shown, while a cylinder housing also included by the lock cylinder 11 as well as tumblers effective between the cylinder housing and the cylinder core 13 in a basically known manner are not shown.

The cylinder core 13 is received in an at least substantially cylindrical receptacle of the cylinder housing and is mounted therein so as to be rotatable about a cylinder axis Z, which corresponds to the axis of symmetry of the cylinder shape of the cylinder core 13. In addition, the cylinder core 13 has a key channel 19 for a key 17 assigned to the lock cylinder 11, which is shown in FIG Fig. 1 is shown.

The lock cylinder 11, together with the key 17 assigned to it, forms a locking device 21 according to the invention Fig. 1 an embodiment of a locking device 21 according to the invention is also shown. The coding element 15 and the key 17 from Fig. 1 or a corresponding key blank 17 'are also shown again from a different viewing direction or in a different relative arrangement to one another in the Figures 4 and 5 shown, but without the in Fig. 1 cylinder core 13 shown.

As in Fig. 1 As can be seen, the key channel 19 of the cylinder core 13 extends from an end face of the cylinder core 13 with a constant cross section along the cylinder axis Z into the cylinder core 13. The cross section of the key channel 19 has an elongated at least approximately rectangular shape, so that the key channel 19 has at least approximately a cuboid shape, the two shorter sides and the two longer sides of the rectangular cross section corresponding to narrow sides 23 and broad sides 25 of the key channel 19. The two narrow sides 23 are arranged opposite one another with respect to a first transverse direction Q1 perpendicular to the cylinder axis Z, while the two broad sides 25 are arranged opposite one another with respect to a second transverse direction Q2 perpendicular to the cylinder axis Z and the first transverse direction Q1.

One of the two narrow sides 23 (in Fig. 1 the upper narrow side 23) coincides with the cylinder jacket surface of the cylinder shape of the cylinder core 13, so that the keyway 19 is designed to be open towards this narrow side 23. In addition the key channel 19 extends along the cylinder axis Z completely through the cylinder core 13, that is from the named end face of the cylinder core 13 to the opposite end face of the cylinder core 13, so that the key channel 19 is also designed to be open towards these two end faces. In this way, the key channel 19 can be designed in a simple manner as an incision along the first transverse direction Q1 in the cylinder core 13.

The key channel 19 also has a receptacle 27 which, like the key channel 19, is designed as an incision along the first transverse direction Q1 in the cylinder core 13. However, unlike the key channel 19, the receptacle 27 does not extend along the cylinder axis Z, but perpendicular to it. As a result, the key channel 19 and the receptacle 27 cross one another so that they partially overlap one another. As a result, the receptacle opens into the key channel. In addition, the receptacle 27 does not extend as deep into the cylinder core 13 in the first transverse direction Q1 as the keyway 19, i.e. not up to its narrow side 23 opposite the open narrow side 23, but only over (slightly) more than half the distance between the two Narrow sides 23 of the key channel 19 from each other.

The receptacle 27 has the shape of a segment of a circle, the chord of which is aligned parallel to the second transverse direction Q2. The receptacle 27 is thus mirror-symmetrical with respect to a mirror plane which is oriented perpendicular to the second transverse direction Q2. The mirror plane of the receptacle 27 is at the same time also a mirror plane of the key channel 19.

The coding element 15 is essentially, that is to say in the present embodiment, except for rounded corners and a central recess 29, designed to be complementary to the receptacle 27 and can thus be inserted into the receptacle 27 with an accurate fit. In particular, the thickness of the coding element 15, which is embodied in the form of a plate, corresponds on the one hand to the thickness of the receptacle 27 and on the other hand, the (also in Fig. 2 shown) cross-section of the coding element 15 with regard to its outer shape (convex shell) has a segment of a circle shape corresponding to the shape of a segment of a circle of the receptacle 27.

Like the entire coding element 15, the recess 29 is formed by punching and extends into the coding element 15 from the center of the chord of the circular segment shape. Because of the overlapping of the receptacle 27 with the key channel 19, the coding element 15 is also partially arranged in the key channel 19 when it is inserted into the receptacle 27. The recess 29 is arranged on the coding element 15 in such a way that it is then located essentially within the area of the overlap between the receptacle 27 and the key channel 19. However, sections of the coding element 15 also protrude into this area and, in this respect, engage in the key channel 19.

Specifically, the coding element 15 engages on the one hand on the open of the two narrow sides 23 of the key channel 19 with a section designated as a stop section 31 and on the other hand on the two broad sides 25 of the key channel 19 each with a section designated as the coding section 33 in the key channel 19. The stop section 31 and the coding sections 33 of the coding element 15 are in particular shown in FIG Fig. 2 can be seen in which the open narrow side 23 and the two broad sides 25 of the key channel 19, as far as they intersect the cross section of the coding element 15, are shown as the cross section of the coding element 15 superimposed broken lines. The open narrow side 23 of the key channel 19 essentially coincides with the section of the circular arc of the circular segment shape of the coding element 15, which is located between the two broad sides 25.

The stop section 31 and the two coding sections 33 of the coding element 15 are each delimited by one or more of the sides 23, 25 of the key channel 19 and the contour of the recess 29. The coding sections 33 are each formed by a projection of the contour, ie a respective section of the contour which protrudes into the free space of the recess 29 compared to other sections of the contour, the projection being essentially in the form of a circular arc.

The stop section 31, on the other hand, extends at a substantially constant distance from the narrow side 23 over the entire narrow side 23 and thereby also adjoins sections of the two broad sides 25 which adjoin the narrow side 23. The two coding sections 33 are arranged separately from the stop section 31 and spaced apart from the stop section 31 along the first transverse direction Q1. The two coding sections 33 extend opposite to one another on one or the other of the two broad sides 25 in the key channel 19, so that they protrude towards one another. The key channel 19 is thereby narrowed from three sides 23, 25.

In Fig. 1 the key 17 assigned to the lock cylinder 11, which represents an embodiment of a key 17 according to the invention, is also shown. The key 17 has a key shaft 35 which extends along a key insertion direction S which, in the illustrated orientation of the key 17 in which it can be inserted into the cylinder core 13, coincides with the cylinder axis Z. The key shaft 35 has, corresponding to the key channel 19 of the cylinder core 13, an elongated, essentially rectangular cross-section with two narrow sides 37 and two broad sides 39, which are opposite to one another in the illustrated orientation of the key 17 with respect to the first transverse direction Q1 and the second transverse direction Q2.

The key 17 has a coding structure 40 which is designed to arrange the tumblers in the releasing configuration when the key 17 with its key shaft 35 is inserted into the key channel 19 of the cylinder core 13. The key 17 shown is a dimple key, in which the coding structure 40 is formed by a multiplicity of drill hollows which are formed on the two broad sides 39 of the key shaft 35. The key shaft 35 is designed symmetrically about a mirror axis parallel to the key insertion direction S, so that it can be inserted into the key channel 19 both in the orientation shown and, in contrast, rotated by 180 ° about the mirror axis, thereby turning the tumblers of the lock cylinder 11 into to relocate the sharing configuration.

In both narrow sides 37 of the key shaft 35, a step 41 is formed at the same position along the key insertion direction S, so that a front section of the key shaft 35 pointing in the key insertion direction S has a reduced extension with respect to the first transverse direction Q1 compared to the rest of the key shaft 35 and thus narrows is. The two levels of the step 41 are each connected to one another by a stop surface 42 oriented perpendicular to the key insertion direction S. The stop surfaces 42 of the two steps 41 each form a stop section 43 of the key shaft 35. When the coding element 15 is inserted into the receptacle 27 of the cylinder core 13 and the key shaft 35 is inserted into the key channel 19 of the cylinder core 13, the key shaft 35 strikes one of these Stop sections 43 (depending on the rotational position of the key 17 with one or the other) on the stop section 31 of the coding element 15. As a result of this striking, the insertion of the key shaft 35 into the key channel 19 is limited to the correct insertion depth in which the coding structure 40 of the key shaft 35 arranges the tumblers of the lock cylinder 11 in the configuration that releases the cylinder core 13 for rotation.

In addition, a profile 45 in the form of a groove is formed in each of the two broad sides 39 of the key shaft 35, which extends parallel to the key insertion direction S starting from a tip 47 of the key shaft 35 pointing in the key insertion direction S along the key insertion direction S at least up to to the steps 41, that is to say at least over the entire said front section of the key shaft 35. The cross-section of the profiling is essentially complementary to the two coding sections 33 of the coding element 15 and therefore has the shape of a circular arc in the embodiment shown.

Due to the complementary design of the profile 45 to the coding sections 33 of the coding element 15, the aforementioned front section of the key shaft 35, when it is inserted into the key channel 19, can be guided past the coding sections 33, so that the key 17 can, despite the fact that the coding element 15 caused constriction of the key channel 19 can be inserted up to the correct insertion depth. The coding element 15 rides on one of the narrow sides 37 of the key shaft 35 and at the same time engages with its coding sections 33 on both sides in the profiling 45 of the two broad sides 39 of the key shaft 35, so that the coding sections 33 pass through the profile 45 until the stop section 43 engages the corresponding narrow side 37 of the key shaft 35 strikes the stop section 31 of the coding element 15. This is especially good in Fig. 5 to recognize where this state, which defines the correct insertion depth, is shown.

In Fig. 3 Another coding element 15 'is shown, which is an example of the one in FIG Fig. 2 The embodiment shown of the coding element 15 represents an alternative embodiment. This in Fig. 3 The coding element 15 'shown also has a stop section 31' and two coding sections 33 ', but each has a different shape than the corresponding sections 31, 33 of the FIGS Fig. 2 Have shown embodiment. In addition, the coding sections 33 'differ from those in FIG Fig. 3 The position shown in the embodiment not only depends on the coding sections 33 of FIG Fig. 2 embodiment shown but also with one another, since they are arranged offset to one another with respect to the first transverse direction Q1. As a result, that's in Fig. 3 Coding element 15 'shown differently than that in Fig. 2 Coding element 15 shown is also not mirror-symmetrical to said mirror plane. In principle, different embodiments of the coding element 15, 15 'can differ not only in terms of shape and position, but in particular also in terms of the number of their coding sections 33, 33', wherein a coding element can also have only one coding section.

If the in Fig. 1 locking device 21 shown in FIG Fig. 3 The other coding element 15 'shown and a further key which largely corresponds to the key 17 shown, in particular has the same coding structure 40, but instead of the profile 45 shown of the key 17 has a different profile corresponding to the other coding element 15', is additionally provided formed an embodiment of a locking system according to the invention. With such a locking system, the in Fig. 2 Coding element 15 shown or the in Fig. 3 The other coding element 15 'shown can be inserted into the receptacle 27 of the cylinder core 13 in order to restrict the lock cylinder 11 to being able to be operated only with the corresponding key 17, ie with that of the two keys 17 that corresponds to the coding element 15 or 15 used 'Has corresponding profiling 45.

In the Figures 4 and 5 is the in Fig. 1 The key 17 shown is shown without the coding structure 40. In this respect, the representation of the bowl 17 is in the Figures 4 and 5 compared to the representation in Fig. 1 simplified. At the same time it corresponds to the Figures 4 and 5 The shown illustration of the key 17 shows the illustration of a key blank 17 ′ according to the invention which corresponds to the key 17 and which is largely identical to the key 17, but does not (yet) have a coding structure 40.

Due to the separate representation of the key 17 or key blank 17 'and the coding element 15 in the Figures 4 and 5 their relative formation to one another and their interaction with one another is further illustrated. In Fig. 5 the state is shown in which one of the two stop sections 43 formed by the steps 41 on the narrow sides 37 of the key shaft 35 strikes the stop section 31 of the coding element 15. This state exists when the key shaft 35 has reached the correct insertion depth when it is inserted into the key channel 19.

In Fig. 4 it can be seen that the profiling 45 extends from the tip 47 of the key shaft 35 to an end face 49 oriented perpendicular to the key insertion direction S. If the profile 45 comprises a plurality of grooves or grooves, each of the grooves or grooves can extend up to a corresponding end face 49. The end surfaces 49 are each at least as far away from the tip 47 of the key shaft 35 as the stop section 43 with respect to the key insertion direction S, so that the key shaft 35 can be guided so far through the recess 29 of the coding element 15 that the stop section 43 of the key shaft 35 the stop section 31 of the coding element 15 also reached. If a respective end surface 49 lies in the same plane perpendicular to the key insertion direction S as the stop section 43 of the key shaft 35, when the correct insertion depth is reached, the end surface 49 also strikes the coding element 15, namely the corresponding one of the coding sections 33 of the coding element 15. In this respect, the end face 49 and the corresponding coding section 33 then form further stop sections formed on the key shaft 35 or the coding element 15 to limit the insertion of the key shaft 35 into the key channel 19 to the correct insertion depth.

By using the coding element 15 or several different coding elements 15, which are optionally inserted into the receptacle 27 of the cylinder core 13 can, a large number of different additional interactions with the respective key 17 can be brought about, which advantageously contribute to increasing the number of possible locking secrets and generally to improving the security of the respective lock cylinder 11.

Reference number

11th

Lock cylinder

13th

Cylinder core

15, 15 '

Coding element

17th

key

17 '

Key blank

19th

Key channel

21

Locking device

23

Narrow side

25th

Broadside

27

admission

29

Recess

31, 31 '

Stop section

33, 33 '

Coding section

35

Key shank

37

Narrow side

39

Broadside

40

Coding structure

41

step

42

Stop surface

43

Stop section

45

Profiling

47

top

49

End face

Q1

first transverse direction

Q2

second transverse direction

S.

Key insertion direction

Z

Cylinder axis

Claims (15)

Lock cylinder (11) with: - a cylinder housing; - A cylinder core (13) which is rotatably mounted in the cylinder housing about a cylinder axis (Z) and a key channel (19) extending parallel to the cylinder axis (Z) in the cylinder core (13) for the key shaft (35) of one of the lock cylinders ( 11) assigned key (17), the key channel (19) having an elongated cross section with two narrow sides (23) which are opposite to one another with respect to a first transverse direction (Q1), and with two broad sides (25) which, with respect to a second transverse direction (Q2) are opposite to each other; - As well as several tumblers that partially protrude into the keyway (19) and are designed to lock the cylinder core (13) in a normal position of the cylinder core (13) against turning from the normal position, provided that they are not, in particular by the assigned key (17) arranged in a configuration releasing the cylinder core (13); characterized,
that the lock cylinder (11) comprises a coding element (15) and that the cylinder core (13) has a receptacle (27) for the coding element (15) which extends transversely to the cylinder axis (Z) in the cylinder core (13) and with the Key channel (19) partially overlaps,
wherein the coding element (15) is designed, when it is inserted into the receptacle (27), to engage on one of the two narrow sides (23) with a stop section (31) in the keyway (19) to provide a stop to limit the insertion the key shaft (35) of the associated To form the key (17) in the key channel (19) to a correct insertion depth, and to engage in the key channel (19) on at least one of the two broad sides (25) with a coding section (33) in order to obtain a permissible profile (45) of the key shaft (35) to encode. Lock cylinder according to claim 1,
wherein the coding element (15) has two coding sections (33, 33 ') and is designed for this purpose, when it is inserted into the receptacle (27), with one of the coding sections (33, 33') on one of the two broad sides (25) and to engage with the other of the coding sections (33, 33 ') on the other of the two broad sides (25) in the key channel (19) in order to code a permissible profiling (45) of the key shaft (35),
wherein the coding element (15) is preferably designed mirror-symmetrically. Lock cylinder according to claim 1 or 2,
wherein the receptacle (27) is slit-shaped, in particular as a circular segment-shaped incision in the cylinder core (13), and extends along a plane perpendicular to the cylinder axis (Z). Lock cylinder according to at least one of the preceding claims,
wherein the coding element (15) is designed in the form of a plate, in particular as a plate in the shape of a segment of a circle; and or
wherein the coding element (15), when it is inserted into the receptacle (27), is at least substantially captured immovably in the receptacle (27). Lock cylinder according to at least one of the preceding claims,
the coding element (15) having a recess (29) with a contour, the stop section (31) corresponding to a section of the contour, and wherein the coding section (33) corresponds to another section of the contour, in particular being formed by a projection of the contour; and or
wherein the stop section (31) and the coding section (33) are arranged at a distance from one another. Locking device (21) with a lock cylinder (11) according to at least one of the preceding claims and at least one key (17) assigned to the lock cylinder (11),
wherein the key shaft (35) of the key (17) extends along a key insertion direction (S) and has an elongated cross section with two narrow sides (37) which are opposite to one another transversely to the key insertion direction (S), and with two broad sides (39) which are opposite to each other transversely to the key insertion direction (S),
wherein the key shaft (35), preferably on at least one of its broad sides (39), has a coding structure (40) which is designed to arrange the tumblers in the releasing configuration when the key shaft (35) is up to the correct insertion depth in the Key channel (19) is introduced. Locking device according to claim 6,
wherein said profiling (45) of the key shaft (35) comprises a groove or groove which is complementary to the coding section (33) of the coding element (15) and which is formed in one of the broad sides (39) of the key shaft (35). Locking device according to claim 6 or claim 7,
wherein the key shaft (35) has one or more stop sections (43) which are designed to be reached when the key shaft (35) is inserted into the key channel (19) of the cylinder core (13) the correct insertion depth to strike a section, in particular the stop section (31) or the coding section (33), of the coding element (15). Locking device according to claim 8,
wherein one of the stop sections (31) of the key shaft (35) is designed as a stop surface (42) oriented perpendicular to the key insertion direction (S), which is formed by a step (41) in one of the narrow sides (37) of the key shaft (35), and or
wherein one of the stop sections (31) of the key shaft (35) is designed as an end surface (49) oriented perpendicular to the key insertion direction (S), up to which the said profiling (45) extends from a tip (47) of the key shaft (35) extends. Locking device according to at least one of claims 6 to 9,
wherein the only stops of the locking device (21) that are effective on the cylinder side are designed to limit the insertion of the key shaft (35) of the associated key (17) into the key channel (19) of the cylinder core (13) to the correct insertion depth on the coding element (15), in particular by the stop section (31) and optionally one or more further stop sections and / or the coding section (33) and optionally one or more further coding sections (33 ') of the coding element (15). Locking system with a locking device according to at least one of Claims 6 to 10,
wherein the locking device (21) comprises several different coding elements (15, 15 ') of the type mentioned, which differ in terms of their coding sections (33, 33'), and several different associated keys (17) which differ in terms of the profiles (45 ) of their Differentiate between key shafts (35), with at least one associated key (17) corresponding to the coding element (15, 15 ') being provided for each coding element (15, 15') insofar as one of the coding section (33) is attached to its key shaft (35). or profiling (45) corresponding to the coding sections (33, 33 ') of this coding element (15), so that optionally one of the coding elements (15, 15') can be inserted into the receptacle (27) of the cylinder core (13) in order to thereby restricting the insertability of the key (17) into the cylinder core (13) to the associated key (17) corresponding to this coding element (15). Key (17) for use with a lock cylinder (11) according to at least one of Claims 1 to 5 or in a locking device (21) according to at least one of Claims 6 to 10 or in a locking system according to Claim 11,
wherein the key (17) comprises a key shaft (35) which extends along a key insertion direction (S) and an elongated cross section with two narrow sides (37) which are opposite to each other transversely to the key insertion direction (S), and with two broad sides (39 ), which are opposite to each other transversely to the key insertion direction (S),
wherein the key shaft (35), preferably on at least one of its broad sides (39), has a coding structure (40) which is designed to arrange the tumblers of the lock cylinder (11) in the releasing configuration when the key shaft (35) is up to a correct insertion depth is inserted into the key channel (19) of the cylinder core (13) of the lock cylinder (11),
wherein the key shank (35) has a stop section (43) which is oriented perpendicular to the key insertion direction (S) and is defined by a step (41) in one of the narrow sides (37) of the key shank (35) formed stop surface (42) is designed to hit the stop section (31) of the coding element (15) of the lock cylinder (11) when the key shaft (35) is inserted into the key channel (19) when the correct insertion depth is reached,
and wherein the key shaft (35) has a profile (45), in particular in the form of at least one groove and / or groove, which is formed in one of the broad sides (39) of the key shaft (35) and extends from a tip (47) of the Key shaft (35) extends with respect to the key insertion direction (S) at least up to the step (41) so that when the key shaft (35) is inserted into the key channel (19), the section of the key shaft (35) having the profile (45) the coding section (33, 33 ') of the coding element (15) of the lock cylinder (11) can be passed. Key (17) according to claim 12,
wherein the profiling (45), in particular a groove and / or groove, extends essentially only up to the step (41). Key blank (17 ') for producing a key (17) according to claim 12 or claim 13,
wherein the key blank (17 ') comprises a key shaft (35) which extends along a key insertion direction (S) and an elongated cross section with two narrow sides (37) which are opposite to each other transversely to the key insertion direction (S), and with two broad sides ( 39), which are opposite to each other transversely to the key insertion direction (S),
wherein the key shaft (35) has a stop section (43) which is designed as a stop surface (42) oriented perpendicular to the key insertion direction (S) and formed by a step (41) in one of the narrow sides (37) of the key shaft (35), in order to introduce the To strike the key shaft (35) in the key channel (19) on reaching the correct insertion depth on the stop section (31) of the coding element (15) of the lock cylinder (11),
and wherein the key shaft (35) has a profile (45), in particular in the form of at least one groove and / or groove, which is formed in one of the broad sides (39) of the key shaft (35) and extends from a tip (47) of the Key shaft (35) extends with respect to the key insertion direction (S) at least up to the step (41) so that when the key shaft (35) is inserted into the key channel (19), the section of the key shaft (35) having the profile (45) the coding section (33, 33 ') of the coding element (15) of the lock cylinder (11) can be passed. Key blank (17) according to claim 14,
wherein the profiling (45), in particular a groove and / or groove, extends essentially only up to the step (41).

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