EP3045621B1 - Lock cylinder, key and key blank - Google Patents

Description

The present invention relates to a locking cylinder with a cylinder housing, a disk housing rotatably mounted in the cylinder housing about a cylinder axis, a plurality of rotatably mounted adjusting disks arranged in the disk housing along the cylinder axis, each adjusting disk having a receiving opening for a key, and a locking element which is arranged in front of the adjusting disks as seen in a key insertion direction and is coupled to the disk housing in a rotationally fixed manner.

A locking cylinder with rotating adjusting discs is also called a disc cylinder. Such a locking cylinder is in the DE 10 2011 015 314 A1 A disc cylinder is also disclosed in the documents EP 0 712 979 B1 , WO 2014026166 A2 , US 4 195 503 , DE 20 2007 002 699 U1 , DE 198 44 593 C1 , WO 2014072570 A1 , DE 201 18 136 U1 and US 4 512 166 known.

According to Fig. 25 and 26 a locking cylinder 10 can have a cylinder housing 12 and a cylinder core which is mounted in the cylinder housing 12 so as to be rotatable about a cylinder axis and which is also referred to below as a disc housing 14. The rotary movement of the cylinder core or the disc housing 14 can be transmitted to a locking mechanism of a lock (not shown) via a coupling section 30 connected to the disc housing 14 and the lock can thus be unlocked or locked using the locking cylinder 10.

In the disc housing 14, several rotatable adjusting discs 16, which are also referred to as locking discs, are accommodated one after the other along the cylinder axis. The adjusting discs 16 have respective central receiving openings 18, which together form a key channel 28 for inserting of a key 24 and which, in the example shown, have a rectangular cross-section. The adjusting disks 16 also have respective circumferential recesses in the form of locking recesses 20 for receiving a locking pin 22 which is aligned parallel to the cylinder axis.

The locking pin 22 is accommodated in a slot 32 provided in the wall of the disk housing 14 in a radially movable manner. When the locking cylinder 10 is in its closed position and the adjusting disks 16 are thus rotated into their locking position, the locking pin 22 assumes a radially outer blocking position. In this blocking position, a section of the locking pin 22 engages in a locking pin receiving recess 34 provided on the inner wall of the cylinder housing 12, so that the disk housing 14 is blocked (apart from a slight torsional play) against a rotational movement relative to the cylinder housing 12.

By means of the key 24, the adjusting disks 16 can be moved from their locking position to an unlocking position. When all adjusting disks 16 are in a so-called final sorting position, which lies between the locking position and the unlocking position, the locking recesses 20 of all adjusting disks 16 are aligned with one another and radially with the locking pin 22, as seen in the direction of the cylinder axis.

In the locking cylinder 10 known from the prior art, the locking pin 22 can then be moved radially inwards into its release position, in which it is located outside the locking pin receiving recess 34. As a result, the disk housing 14 is released for a rotational movement relative to the cylinder housing 12 and the disk housing 14 can be rotated further together with the adjusting disks 16 in the unlocking direction until the unlocking position is reached.

On the outer circumference of each adjusting disk 16, a fixing recess 44 is also provided for receiving a core pin 46. The core pin 46 is aligned parallel to the cylinder axis and is accommodated in a slot provided in the wall of the disk housing 14 in a radially movable manner. In the closed position of the locking cylinder 10, the core pin 46 engages in the fixing recesses 44 of the adjusting disks 16 and thus prevents the adjusting disks 16 from rotating relative to one another when no key 24 is inserted.

The key 24 assigned to the locking cylinder 10 has several differently angled notches 26 that correspond to different angular positions of the locking recesses 20 of the adjusting disks 16. After being inserted into the key channel 28, the key 24 initially assumes a so-called initial position, from which the key 24 can be turned in the unlocking direction. By turning the key 24 in the unlocking direction from the initial position, the key 24 initially reaches a so-called zero position, in which the core pin 46 can come out of engagement with the fixing recesses 44 of the adjusting disks 16 and the adjusting disks 16 are thus released for a rotary movement relative to the disk housing 14 in order to be able to align the locking recesses 20 of the adjusting disks 16 one after the other (so-called sorting).

The adjusting disks 16 have a certain torsional play with respect to the respectively associated notch 26 of the key 24, the extent of which depends on the angular dimension of the respective notch 26, ie depending on the angular dimension of the notches 26, control sections of the respective notches 26 and corresponding control sections of the central receiving openings 18 of the associated respective adjusting disks 16 engage with one another at different times or in different angular positions during sorting.

For example, starting from the zero position of the setting disks 16, the entire rotation path of the key until the final sorting position of all setting disks 16 is reached is approximately 110°, i.e. after turning the key 24 by approximately 110°, all setting disks 16 are sorted and the locking recesses 20 are aligned radially with the locking pin 22. Typically, a grid of six different angular positions with equal spacing is provided for the possible angular positions of the locking recesses 20, with the angular distance between two locking recesses 20 adjacent in the grid being approximately 18°. Accordingly, there are six possible codings for each setting disk 16, whereby to set one of these codings, the respective setting disk 16 must be rotated by a certain angle from its zero position. In the exemplary locking cylinder 10, a code "1" corresponds to a rotation of the adjusting disk 16 by approximately 20°, an adjacent code "2" corresponds to a rotation of approximately 38°, etc. and finally a code "6" corresponds to a rotation of approximately 110°, each measured from the zero position until the end of the sorting position is reached. The locking recesses 20 are accordingly arranged at an angular distance from the locking pin receiving recess 34 of the cylinder housing 12 that corresponds to the respective code when the adjusting disks 16 are in the zero position.

With the coding "6", a positive coupling can be provided between the corresponding adjusting disk 16 and the associated section of the key 24, i.e. there is no notch or a notch with an angle of 0°, so that there is no torsional play between the key 24 and the adjusting disk 16.

With coding "1", however, there is the greatest possible torsional play between key 24 and adjusting disk 16, ie a notch 26 with an angle of approximately 90° is provided on key 24. An adjusting disk 16 with coding "1" is therefore only used at the end of the rotation of the key 24, ie after a rotation of approximately 90°, and brought into their final sorting position by a further rotation of the key 24 by approximately 20°.

A disc cylinder can also have one or more so-called lifting discs, which are usually adjusting discs. Each lifting disc has the code "6" and is arranged in a predetermined axial position in the disc housing, e.g. at the very front, the very back or in the middle of the locking cylinder 10 with respect to the key insertion direction. The adjusting disc that functions as a lifting disc is positively coupled to the key 24. When the key is operated in the unlocking direction, the lifting disc serves to couple the key 24 to the disc housing 14 after sorting has been completed (rotation by 110°) and thus causes the disc housing 14 to rotate. Starting from the release position of the locking pin 22, the lifting disc ensures that the locking pin 22 is properly lifted out of the locking recesses 20 of the adjusting discs 16 (i.e. pushed into the locking pin receiving recess 34) and does not become jammed when the key is operated in the locking direction.

Furthermore, it is usual to arrange intermediate disks 36 between the adjusting disks 16, which are coupled to the disk housing 14 in a rotationally fixed manner or with torsional play. The intermediate disks 36 decouple adjacent adjusting disks 16 from one another so that the rotational movement of a respective adjusting disk 16 does not cause the adjacent adjusting disk 16 to rotate due to friction. Such a movement could lead to an adjusting disk 16 being rotated beyond its unlocking position and the locking cylinder 10 therefore no longer being able to be opened.

The rotationally fixed coupling of the intermediate disks 36 with the disk housing 14 can be achieved by stop sections 40 of the intermediate disks 36 extending at least partially in the radial direction ( Fig. 26 ), which are connected to corresponding, projections 42 formed on the inner wall of the disc housing 14.

Each intermediate disk 36 has a circumferential recess 38 which is radially aligned with the locking pin 22. Accordingly, each intermediate disk 36 has a further circumferential recess 38a which is radially aligned with the core pin 46 and which is preferably diametrically opposite the circumferential recess 38. The dimensions of the circumferential recess 38 are adapted to the diameter of the locking pin 22 so that the intermediate disks 36 do not hinder the locking pin 22 from being moved into its release position. The same preferably also applies to the circumferential recess 38a with respect to the core pin 46.

Locking cylinders of the type described above have proven to be advantageously tamper-proof. Nevertheless, an unauthorized person can use a suitable so-called picking tool to try to scan the individual setting disks one after the other and thereby sort them one after the other, i.e. bring them into the respective final sorting position in order to then unlock the locking cylinder. An attempt could also be made to detect the coding of the setting disks explained above, i.e. the respective angular position of the locking recesses, in order to reproduce a key with suitable cuts.

The present invention is based on the object of improving a locking cylinder of the type described above in such a way that it offers improved protection against manipulation, such as picking. Furthermore, a key and a key blank are to be specified which are adapted to such a locking cylinder.

The object is achieved by a locking cylinder having the features of claim 1.

In the locking cylinder according to the invention, by turning the key in an unlocking direction, the locking element can be moved from a locking position, in which the locking element engages in a receiving recess of the cylinder housing, into a release position, in which the locking element is disengaged from the receiving recess.

In the locking cylinder according to the invention, the locking element can thus be actuated by turning the key and thereby moved from the locking position to the release position. In the locking position, the locking element can lock the disk housing against rotation relative to the cylinder housing by the locking element engaging in a receiving recess on an inner wall of the cylinder housing. This locking effect can be canceled by rotating the locking element using the appropriate key. However, simply inserting the key into the locking cylinder is not sufficient to actuate the locking element. Rather, it is necessary that the key is turned to actuate the locking element and that the key, in particular the tip of the key, is adapted so that the locking element is actuated in the intended manner, i.e. moved into the release position. However, the locking cylinder cannot be unlocked with an unsuitable key that cannot actuate the locking element in the intended manner. Since the locking element is arranged in front of the adjusting disks (and in particular in front of the disk housing) when viewed in the key insertion direction, the locking element is located at the distal end of the disk housing when viewed from the insertion opening for the key in the key channel. The locking element is therefore difficult to reach, e.g. with a picking tool. The locking cylinder therefore has improved protection against manipulation, in particular against picking.

The locking element is also referred to below, especially in the description of the figures, as a rotary sliding lock.

If reference is made in connection with the invention to the "direction of insertion" of the key, the terms "in front" or "front" generally refer to a position in the direction of insertion and the terms "behind" or "rear" refer to a position opposite to the direction of insertion.

The locking element can have an output flank that interacts with a drive flank formed on the tip of the key in such a way that the locking element is moved from the locking position into the release position by turning the key in the unlocking direction. The locking element and the key tip can thus come into contact with one another via the said flanks in order to bring the locking element into the release position by turning the key in the unlocking direction.

Preferably, the output flank of the locking element and the drive flank at the tip of the key are adapted to this and interact with each other in such a way that the two flanks only contact each other when the key has been rotated from an initial position, which the key assumes after being inserted into the locking cylinder, into at least a first rotational position. The first rotational position preferably corresponds to a rotational position which the key assumes after passing the aforementioned zero position (in which the setting disks are released for rotational movement relative to the disk housing) shortly before reaching the aforementioned final sorting position.

According to a further development of the invention, the output flank of the locking element and the drive flank at the tip of the key are further adapted and interact with each other in such a way that the locking element moves from the locking position to the release position, while the key is rotated from the first rotational position in the unlocking direction to a second rotational position. The second rotational position is preferably the one already mentioned. Final sorting position in which the adjusting disks are sorted and the locking recesses of the adjusting disks are aligned with each other in the direction of the cylinder axis.

The receiving openings of the adjusting disks can, in particular together with at least one lifting disk, form the said key channel in the initial position of the locking cylinder (preferably with an at least substantially rectangular cross-sectional shape), wherein the said output flank of the locking element is preferably arranged outside the key channel, i.e. does not protrude into the key channel when viewed in axial alignment. The picking security can thus be increased since the locking element is difficult to access and operate via the key channel.

The tip of the key preferably has a cross-sectional shape with two narrow sides and two broad sides, which are longer than the narrow sides, wherein the locking element can be driven by one of the broad sides of the key tip to move from the locking position to the release position. The drive flank can thus be formed by a broad side of the key tip. According to one embodiment of the invention, when the key is rotated in the unlocking direction, the locking element can be rotated from an initial position, which the key assumes after being inserted into the lock cylinder, to a first or the already mentioned first rotational position in such a way that the locking element initially remains in the locking position. For this purpose, the receiving recess on the inner wall of the cylinder housing, in which the locking element engages in the locking position, is preferably larger in the circumferential direction than the extent of the end of the locking element protruding into the receiving recess in the circumferential direction. The locking element therefore has a torsional play relative to the cylinder housing in its locking position according to the invention. This torsional play preferably occurs starting from an initial position of the locking cylinder, ie after inserting the key The torsional play must first be overcome and only then does further turning of the key cause the locking element to move from the locked position to the released position.

Preferably, the receiving recess on the inner wall of the cylinder housing has a first stop surface for an end of the locking element projecting into the receiving recess (in particular the end already mentioned), against which the end of the locking element comes to rest when the key is turned in the unlocking direction from an initial position, which the key assumes after insertion into the locking cylinder, into a first rotational position (in particular the first rotational position already mentioned), wherein the first stop surface blocks further rotation of the locking element in the unlocking direction. When the first rotational position is reached, the locking element must therefore be brought into the release position, because otherwise further rotation in the unlocking direction is not possible. With an unsuitable key that cannot actuate the locking element as intended, it is therefore not possible to unlock the locking cylinder.

The receiving recess of the cylinder housing preferably has a second stop surface for the end of the locking element that projects into the receiving recess, wherein the end of the locking element rests against the second stop surface when the key is removed and the second stop surface blocks rotation of the locking element against the unlocking direction. When the key is removed, i.e. in the starting position, this results in a defined position for the locking element and the disk housing coupled to it.

According to a further development of the invention, the locking element is mounted in a plane normal to the cylinder axis so that it can be moved in a straight line. In particular, the locking element can be moved from the locking position to the release position at least essentially in a direction transverse to the cylinder axis. The locking element can be mounted so as to be linearly displaceable with respect to the cylinder axis in the radial direction or in a direction parallel to a radial direction.

The locking element is preferably pre-tensioned in the direction of the locking position, in particular by means of a spring. This allows the locking element to be held in the locking position, in particular when the key is removed.

According to a preferred development of the invention, a further locking element, which is also referred to as a sliding lock, is arranged in front of the adjusting disks (and in particular in front of the disk housing) as seen in the key insertion direction. The further locking element is thus located at the distal end of the disk housing. The further locking element is also preferably coupled to the disk housing in a rotationally fixed manner.

When the key is removed, the additional locking element preferably assumes a locking position in which the additional locking element engages in a further receiving recess on the inner wall of the cylinder housing, and the additional locking element can be moved out of engagement with the additional receiving recess and thus into a release position by inserting the key into the lock cylinder. The additional locking element can therefore (in contrast to the locking element explained above) be moved from the locking position into the release position simply by axially inserting the appropriate key.

The locking element (in particular the aforementioned rotary slide lock) and the further locking element (in particular the aforementioned slide lock) are preferably arranged next to one another in the same cross-sectional plane of the locking cylinder (ie at the same height along the cylinder axis) and mounted so that they can be displaced parallel to one another. This allows two different locking and unlocking functions to be achieved with a small overall length, ie with a small axial installation space of the locking cylinder. which become effective at different times or at different positions of the locking cylinder.

The further locking element is preferably also prestressed in the direction of its locking position, in particular by means of a spring.

According to a preferred embodiment of the invention, in the locking cylinder, each adjusting disk has a locking recess on the outer circumference for at least partially receiving a locking pin aligned parallel to the cylinder axis and, offset from the locking recess, a fixing recess provided on the outer circumference for at least partially receiving a core pin aligned parallel to the cylinder axis, wherein the adjusting disks can be rotated from an initial position with the key removed by turning the inserted key in the unlocking direction into a final sorting position in which the locking recesses of all adjusting disks are aligned with one another as seen in the direction of the cylinder axis, wherein in the final sorting position the fixing recesses of all adjusting disks are aligned with one another as seen in the direction of the cylinder axis, and wherein the locking cylinder is designed in such a way that when the adjusting disks are rotated further from the final sorting position in the unlocking direction, first the core pin penetrates into the fixing recesses and only then the locking pin penetrates into the locking recesses.

In this locking cylinder, the locking recesses of all setting disks are aligned in the direction of the cylinder axis in the final sorting position. However, the locking pin does not immediately enter the locking recesses of the setting disks in the final sorting position, but only when the setting disks are turned further in the unlocking direction beyond the final sorting position, after the core pin has entered the fixing recesses of the setting disks. In other words, for the core pin to engage in the fixing recesses and the engagement of the locking pin in the locking recesses defines a chronological sequence. The core pin engaging in the fixing recesses fixes the adjusting disks against one another (and relative to the disk housing) so that once the final sorting position has been reached and they are rotated slightly further in the unlocking direction, they can no longer be rotated individually (i.e. relative to one another). It is therefore no longer possible to pick the locking cylinder by individually rotating the adjusting disks using a picking tool and detecting that the final sorting position has been reached by the locking pin settling in the locking recesses aligned with the locking pin. In particular, this prevents the locking pin from being forced radially inwards by applying a torque and at the same time preventing the locking pin from being felt against the lateral boundary of the locking recess of this individual adjusting disk by rotating an individual adjusting disk, in order to record the codings of the individual adjusting disks one after the other.

Preferably, the fixing recess of a respective setting disk, into which the core pin engages in the final sorting position, is one of several similarly designed fixing recesses that are arranged next to one another on the outer circumference of the respective setting disk in the circumferential direction. The fixing recesses or the transition areas between two respective fixing recesses that protrude radially outwards can serve as chatter marks when the respective setting disk is rotated. In addition, the fixing recesses are not suitable for a picking attempt, since the "correct" position of the setting disk cannot be determined using the fixing recesses due to the multiple fixing recesses present in a setting disk. The locking cylinder is therefore characterized by a particularly high level of protection against manipulation and in particular against picking.

When the core pin penetrates the fixing recesses of the adjusting disks, the core pin can move inwards and fix the adjusting disks relative to the disk housing. In addition, a blockage of the disk housing against rotation relative to the cylinder housing caused by the core pin can be released. The subsequent engagement of the locking pin in the locking recesses also allows the locking pin to move radially inwards and a blockage of the disk housing against rotation relative to the cylinder housing caused by the locking pin can be released. After the core pin and the locking pin have engaged, the disk housing can be rotated further together with the adjusting disks in the unlocking direction until it reaches the unlocking position.

In order to achieve a defined sequence of movements, a positive guide is preferably provided both for the described penetration of the core pin into the fixing recesses and for the described penetration of the locking pin into the locking recesses, i.e. the core pin is forced into the fixing recesses and the locking pin is forced into the locking recesses.

Preferably, the core pin engages in the final sorting position of the adjusting discs in a core pin receiving recess provided on the inner wall of the cylinder housing, and the locking cylinder is adapted so that by turning the key from the final sorting position in the unlocking direction, the core pin is pushed radially inwards into the fixing recesses. By engaging in the core pin receiving recess, the core pin can block rotation of the disc housing relative to the cylinder housing. This blocking is released after the core pin has moved radially inwards into the fixing recesses. By engaging the core pin in the fixing recesses, the adjusting discs are fixed relative to the disc housing, so that they can no longer be rotated individually relative to the disc housing, but only the disc housing and the adjusting discs can still be rotated together in the unlocking direction.

In particular, the core pin receiving recess or the cylinder housing can have a core pin guide bevel that delimits the core pin receiving recess when viewed in the unlocking direction and is adapted to push the core pin radially inwards into the fixing recesses. The core pin guide bevel can ensure that the core pin is pushed into the fixing recesses at a defined angle of rotation after the key or the disk housing is turned further beyond the sorting end position. The rotational movement of the key can be transmitted to the disk housing via a stop on a lifting disk and/or via a respective stop on the adjusting disks.

According to a preferred development of the invention, the locking cylinder is adapted so that the locking pin, in the final sorting position of the adjusting disks, engages in a locking pin receiving recess provided on the inner wall of the cylinder housing, and that, after the core pin has been pushed into the fixing recesses, the locking pin is pushed radially inwards into the locking recesses by further turning the key in the unlocking direction. By the locking pin engaging in the locking pin receiving recess, the locking pin fixes the disk housing to the cylinder housing against twisting. After the locking pin has been pushed radially inwards, the disk housing can be further rotated relative to the cylinder housing in the unlocking direction until the unlocking position is reached.

Preferably, a locking pin guide bevel is provided on the cylinder housing which delimits the locking pin receiving recess in the unlocking direction and which pushes the locking pin radially inwards beyond the end sorting position when the key or the disk housing is turned further in the unlocking direction.

The locking pin guide bevel makes it easy to ensure that the locking pin is guided radially inwards at a defined angle of rotation.

Preferably, viewed in the direction of rotation, the core pin receiving recess of the cylinder housing, into which the core pin engages in the final sorting position, extends over a smaller circumferential angle than the locking pin receiving recess of the cylinder housing, into which the locking pin engages in the final sorting position. Starting from the final sorting position of the adjusting disks, the locking pin can thus have a greater torsional play within the locking pin receiving recess in the unlocking direction than the core pin within the core pin receiving recess.

This different torsional play exists starting from the final sorting position, particularly in the unlocking direction. In this case, the core pin receiving recess can be limited in the unlocking direction by the aforementioned core pin guide bevel and the locking pin receiving recess of the cylinder housing can be limited in the unlocking direction by the aforementioned locking pin guide bevel, whereby in the final sorting position the angular distance between the core pin and the core pin guide bevel is smaller than the angular distance between the locking pin and the locking pin guide bevel.

Preferably, the core pin receiving recess and the locking pin receiving recess are at least substantially diametrically opposite one another with respect to the cylinder axis. Accordingly, the core pin and the locking pin are preferably at least substantially diametrically opposite one another.

Preferably, at least one lifting disc is provided, which is arranged parallel to the adjusting discs and is rotatably mounted in the disc housing and which also has a (particularly central) receiving opening for the key, The lifting disc is positively coupled to the inserted key with respect to rotation of the key. The positive coupling between the key and the lifting disc can be achieved in particular by the lifting disc and the associated notch of the key having the coding "6" explained at the beginning. This means that there is no torsional play between the key and the lifting disc. When the key is turned, the lifting disc therefore always rotates with it.

Preferably, this lifting disc is arranged in front of the adjusting discs in the disc housing when viewed in the key insertion direction, i.e. in the area of the distal end of the locking cylinder facing away from the key insertion opening. However, the lifting disc can also be arranged at another location in the disc housing, e.g. behind the adjusting discs or in the middle between the adjusting discs.

Like the adjusting disks, the lifting disk preferably has at least one fixing recess on its outer circumference for at least partially receiving the core pin. The lifting disk, like the adjusting disks, preferably has several fixing recesses lying next to one another in the circumferential direction, which can also function as chatter marks when the adjusting disks or the lifting disk are rotated.

According to an advantageous embodiment, the lifting disc is assigned a control element which is mounted in a slot in the disc housing, wherein the control element can be movable in particular in the radial direction. By means of such a control element, the lifting disc can be used to control various movement sequences of coupling and uncoupling with a high degree of precision.

The lifting disc preferably has a control recess on its outer circumference for at least partially accommodating the control element. By engaging the control element in the control recess, the lifting disc can be optionally fixed to the disc housing, so that the lifting disc and the disc housing can only be rotated together.

Preferably, the control element engages in the control recess of the lifting disc in the starting position, i.e. when the key is removed. In the starting position, the control element thus fixes the disc housing and the lifting disc to one another. In the starting position, the lifting disc thus has a defined alignment so that the key can be inserted without any problem. In addition, it can be provided that the core pin engages in a fixing recess of the lifting disc in the starting position and thus also fixes the lifting disc to the disc housing.

According to one embodiment of the invention, the disk housing and the lifting disk (in particular together with the adjusting disks) can be rotated from an initial position, i.e. with the key inserted but not yet turned, in the unlocking direction into a zero position, in which the control element penetrates radially outwards into a control element receiving recess formed on the inner wall of the cylinder housing and disengages from the control recess of the lifting disk. As the control element penetrates into the control element receiving recess, the disk housing is fixed in the zero position relative to the cylinder housing. In addition, the fixation between the disk housing and the lifting disk caused by the control element between the initial position and the zero position is canceled as soon as the control element is disengaged from the control recess of the lifting disk. Preferably, in the zero position, the core pin can also disengage from the said fixing recess of the lifting disk by the core pin in the zero position being pushed radially outwards into the said core pin receiving recess of the cylinder housing. Any blockage caused by the core pin preventing the lifting disc from rotating relative to the disc housing is thus removed. The lifting disc can therefore be rotated relative to the disc housing in the unlocking direction starting from the zero position.

By means of the lifting disc and the control element, the zero position, which refers to the sorting of the adjusting discs, can be easily set or controlled.

Preferably, the lifting disc can be rotated from the zero position to the final sorting position relative to the disc housing, while the disc housing is fixed to the cylinder housing in particular by the control element engaging in the control element receiving recess. The key, which is positively coupled to the lifting disc, can thus be rotated further from the zero position to the final sorting position. When the final sorting position is reached, all setting discs are sorted, i.e. the locking recesses of the setting discs are aligned with one another.

According to a preferred embodiment of the invention, the lifting disc has a circumferential recess on its outer circumference for at least partially accommodating the control element. In particular, the circumferential recess is offset in the circumferential direction from the aforementioned control recess on the outer circumference of the lifting disc, wherein the circumferential recess forms a further control recess.

Preferably, in the final sorting position (and preferably already during the sorting of the adjusting disks), the control element engages in a control element receiving recess which is formed on the inner wall of the cylinder housing and which preferably corresponds to the control element receiving recess already mentioned, wherein in the final sorting position the circumferential recess of the lifting disk is aligned with the control element in the radial direction in order to subsequently partially accommodate the control element. By engaging the control element in the control element receiving recess, the disc housing is fixed to the cylinder housing in the final sorting position.

Preferably, the locking cylinder is adapted so that the control element is forced radially inwards into the circumferential recess of the lifting disc - in particular by turning the lifting disc in the unlocking direction from the final sorting position. The control element then disengages from the control element receiving recess, whereby the fixing of the disc housing to the cylinder housing caused by the control element is cancelled. In addition, the control element engages with the circumferential recess, so that the control element fixes the lifting disc to the disc housing.

Particularly preferably, a control element guide bevel is provided on the cylinder housing (in particular on the inner wall of the cylinder housing) which delimits the control element receiving recess when viewed in the unlocking direction and which - when the lifting disc is rotated in the unlocking direction from the final sorting position - pushes the control element radially inwards into the circumferential recess of the lifting disc. The control element can thus be easily disengaged from the control element receiving recess, pushed radially inwards and brought into engagement with the circumferential recess of the lifting disc. This makes it possible to control the time or the angular position for decoupling the disc housing from the cylinder housing or for coupling the disc housing to the lifting disc and thus to the key after the final sorting position has been reached.

According to a further development of the invention, the control element receiving recess provided on the cylinder housing extends, viewed in the unlocking direction, over a circumferential angle that is less than or at most as large as the circumferential angle of a core pin receiving recess provided on the cylinder housing (in particular the core pin receiving recess already mentioned), into which the core pin engages in the final sorting position. In the final sorting position, the core pin receiving recess therefore offers at least the same torsional play for the core pin as the control element receiving recess for the control element, so that the explained sequence control is determined by the interaction of the control element with the control element receiving recess.

This different torsional play exists in particular starting from the final sorting position in the unlocking direction. In this case, the control element receiving recess of the cylinder housing can be limited in the unlocking direction by the control element guide bevel mentioned and the core pin receiving recess can be limited in the unlocking direction by the core pin guide bevel mentioned, wherein in the final sorting position the angular distance between the control element and the control element guide bevel corresponds at most to the angular distance between the core pin and the core pin guide bevel, and wherein the former is preferably smaller than the latter.

According to a preferred embodiment of the invention, the lifting disc has a stop on the outer circumference, which comes into contact with a counter stop provided on the disc housing when the lifting disc is rotated from the starting position in the unlocking direction when the final sorting position is reached. By further rotating the lifting disc in the unlocking direction from the final sorting position, the disc housing is also rotated due to the interaction between the stop and the counter stop. This rotational movement allows the control element to be disengaged from the control element receiving recess in the inner wall of the cylinder housing and to be engaged with the circumferential recess of the lifting disc. In addition, the core pin can be pushed radially inwards so that it comes out of engagement with the core pin receiving recess and into engagement with the fixing recess provided on the outer circumference of the lifting disc. In addition, the core pin comes into engagement with the fixing recesses of the setting discs aligned in the final sorting position. The core pin can thus fix all setting discs to the disc housing against twisting when the key is turned further beyond the final sorting position. Only then - when the setting discs are turned further in the unlocking direction - can the locking pin be pushed radially inwards out of the locking pin receiving recess into the locking recesses of the setting discs, thus enabling further twisting of the setting discs and the disc housing until the unlocking position is reached.

Alternatively or additionally, the lifting disc has a further stop on the outer circumference, which comes into contact with a further counter stop provided on the disc housing when the lifting disc is rotated back from the final sorting position in the locking direction (in particular when the zero position is reached). By further rotating the lifting disc in the locking direction (in particular from the zero position), the disc housing can be rotated due to the interaction between the further stop and the further counter stop. The rotary movement of the disc housing can bring the control element out of engagement with the control element receiving recess in the inner wall of the cylinder housing and into engagement with the control recess of the lifting disc. In addition, the core pin can be pushed radially inwards out of the core pin receiving recess so that the core pin comes out of engagement with the core pin receiving recess and into engagement with the fixing recess provided on the outer circumference of the lifting disc. In doing so, the core pin also comes into engagement with the (aligned in the zero position, viewed in the radial direction with the core pin receiving recess aligned) fixing recesses of the adjusting disks, so that when the key is turned further in the locking direction beyond the zero position, the core pin fixes all adjusting disks to the disk housing against rotation. The disk housing with the adjusting disks fixed to the disk housing via the core pin and the lifting disk fixed to the disk housing via the control element and the core pin can thus be turned back to the starting position in which the key can be removed.

The control element can in particular be a pin-like control element, such as a control pin, which is preferably aligned parallel to the cylinder axis. However, the control element can also be formed by a ball, for example.

The control element is preferably offset with respect to the locking pin along the cylinder axis, but is arranged in the same angular position, i.e. the control element is at least substantially aligned with the locking pin when viewed in the direction of the cylinder axis (apart from a possible radial offset). In this respect, a two-part control pin arrangement is provided, which comprises the locking pin and the separate, independently movable control element. In particular, the control element designed as a pin can be accommodated in the same slot in the disk housing as the locking pin. The locking pin thus interacts with the locking recesses of the adjusting disks, but not with the lifting disk explained. However, it can very well interact with at least one other lifting disk.

In contrast, the core pin preferably works together with both the lifting disc and the adjusting discs. The slot in the disc housing for receiving the locking pin and the control element can preferably (as can preferably the slot in the disc housing for receiving the core pin) be in the form of an opening in the disc housing extending in the direction of the cylinder axis.

When the key is inserted, the disc housing and the adjusting discs (coupled to the disc housing in particular via the core pin) can preferably be rotated together in the unlocking direction from the starting position to a zero position or the zero position already mentioned.

The adjusting disks can be individually rotated in a known manner between the zero position and the final sorting position relative to the disk housing. By turning the key between the zero position and the final sorting position, the adjusting disks can be sorted in a known manner. In the final sorting position, the locking recesses and the fixing recesses of all adjusting disks are aligned with one another when viewed in the direction of the cylinder axis. In addition, the locking recesses of the adjusting disks in the final sorting position are radially aligned with the locking pin receiving recess of the cylinder housing, and the fixing recesses of the adjusting disks, which are aligned when viewed in the direction of the cylinder axis, are aligned with the core pin receiving recess of the cylinder housing when viewed in the radial direction.

The invention also relates to a key or key blank for a locking cylinder of the type explained, comprising a shaft, the tip of which is adapted to interact with a locking element provided in the locking cylinder, wherein the shaft has two broad sides and two narrow sides, wherein the shaft tip has two broad sides, two narrow sides and an end face, and wherein a flattened portion set back relative to a plane of the broad side of the shaft is provided on at least one broad side of the shaft tip.

The flattening on the tip of the shaft enables the key to be inserted into an associated key channel in an initial position of the locking cylinder (corresponding to the initial position already mentioned) without the tip of the shaft hitting a locking element of the type described above (in particular the rotary slide lock mentioned). Nevertheless, the locking element can have a drive flank that can reach relatively close to the cylinder axis for rotary actuation of the locking element by means of the key. After inserting the key into the locking cylinder or into the key channel mentioned, a drive flank of the Shaft tip, which can in particular be provided laterally adjacent to the flattening of the shaft tip and/or lie in the plane of the corresponding shaft broad side, comes into contact with the output flank of the locking element when the key is turned in the locking cylinder in order to move the locking element into the release position.

In the area of the respective flattening, the broad side of the shaft tip can be set back in relation to the plane of the broad side of the shaft. The plane of the broad side of the shaft is preferably a plane that overlaps the outer elements of the broad side of the shaft. Recesses, such as a longitudinal groove in the broad side, are set back in relation to this overlapping plane towards the key axis and are therefore not in the plane of the broad side of the shaft.

The flattening is preferably formed along the key axis over the entire broad side of the shaft tip. However, the flattening can also be formed only over a part of the broad side of the shaft tip, viewed in the direction of the key axis.

In a direction transverse to the key axis, the flattening preferably extends only over a part of the broad side of the shaft tip, while another part of the broad side of the shaft tip (in particular the entire or almost entire remaining part) may lie in the plane of the corresponding broad side of the shaft.

According to a further embodiment, the flattening can extend in a direction transverse to the key axis only over a part of the broad side of the shaft tip, while another part of the broad side of the shaft tip (in particular the entire or almost the entire remaining part) forms the aforementioned drive flank of the shaft tip (or key tip) for displacing of the locking element by turning the key. In this case, the drive flank can, as explained above, lie in the plane of the corresponding broad side of the shaft. Alternatively or additionally, in this embodiment the drive flank of the shaft tip can extend in a direction transverse to the key axis only over a part of the broad side of the shaft tip, which corresponds to a proportion in the range of approximately 10% to 50%, in particular a proportion in the range of approximately 20% to 40%, and preferably a proportion of approximately 30% of the total width of the respective broad side of the shaft tip (with regard to rounded edges and/or transitions, these are approximate figures). In other words, the drive flank extends in the transverse direction preferably at most over half the width of the respective broad side of the shaft tip.

However, the flattening can generally also extend across the entire broad side of the shaft tip in the transverse direction.

The flattening can run parallel to the plane of the broad side of the shaft. The flattening can also run diagonally to the plane of the broad side of the shaft. Alternatively, the flattening can run partially parallel and partially diagonally to the plane of the broad side of the shaft.

Preferably, the flattening is inclined relative to the plane of the broad side of the shaft by a predetermined angle, wherein the angle is preferably in the range between 2 and 25 degrees, more preferably between 5 and 20 degrees and even more preferably between 10 and 15 degrees (including the range limits in each case).

According to a preferred embodiment of the invention, a respective flattened portion is provided on each of the two broad sides of the shaft tip, wherein the two flattened portions are preferably designed to be rotationally symmetrical to one another. The key can preferably be designed in the form of a reversible key. According to a further development of the invention, the two narrow sides of the shaft tip run tapered towards the front side. The narrow sides thus run towards each other like a roof. This results in a tapered shape at the front end, which makes it easier to insert the key into the keyway.

The shaft tip can be separated from the rest of the shaft by a circumferential notch on the narrow sides. This results in a defined shaft tip that is separated from the rest of the shaft. The notch is preferably between 1 mm and 3 mm away from the front end of the shaft tip.

In a front part of the shaft, near the shaft tip, a further circumferential notch can be formed on the narrow sides. When the key is turned in the unlocking direction from the initial position, an associated locking disc provided in the lock cylinder can engage in the further notch. If there is no further notch, the locking disc blocks the rotation, so that the combination of the further notch and the associated locking disc can further increase the security against manipulation. The further notch can have a distance of between 3 mm and 5 mm from the front end of the shaft tip.

Further advantageous embodiments of the invention are specified in the dependent claims, the description and the drawings.

Fig. 1

eine Explosionsdarstellung eines erfindungsgemäßen Schließzylinders mit zugehörigem Schlüssel,

Fig. 2a und 2b

eine perspektivische Ansicht des Schlüssels aus Fig. 1 bzw. eine Frontansicht der Schlüsselspitze,

Fig. 3

eine teilgeschnittene Seitenansicht des Schließzylinders von Fig. 1 mit eingeführtem Schlüssel,

Fig. 4 bis 6

eine Querschnittsansicht durch den Schließzylinder von Fig. 1 in einer Ausgangsstellung bei abgezogenem Schlüssel, auf Höhe einer Drehschiebesperre, bzw. auf Höhe einer vorderen Aushebescheibe, bzw. auf Höhe einer hinteren Aushebescheibe,

Fig. 7 bis 9

eine Querschnittsansicht durch den Schließzylinder von Fig. 1 in einer Anfangsstellung bei eingeführtem und noch nicht verdrehtem Schlüssel, auf Höhe der Drehschiebesperre, bzw. auf Höhe der vorderen Aushebescheibe, bzw. auf Höhe der hinteren Aushebescheibe,

Fig. 10 bis 12

eine Querschnittsansicht durch den Schließzylinder von Fig. 1 bei in eine Nulllage verdrehtem Schlüssel, auf Höhe der Drehschiebesperre, bzw. auf Höhe der vorderen Aushebescheibe, bzw. auf Höhe der hinteren Aushebescheibe,

Fig. 13 bis 15

eine Querschnittsansicht durch den Schließzylinder von Fig. 1 bei in eine Sortierendstellung verdrehtem Schlüssel, auf Höhe der Drehschiebesperre, bzw. auf Höhe der vorderen Aushebescheibe, bzw. auf Höhe der hinteren Aushebescheibe,

Fig. 16 bis 18

eine Querschnittsansicht durch den Schließzylinder von Fig. 1 bei in eine Entsperrstellung verdrehtem Schlüssel, auf Höhe der Drehschiebesperre, bzw. auf Höhe der vorderen Aushebescheibe, bzw. auf Höhe der hinteren Aushebescheibe,

Fig. 19 bis 21

eine Querschnittsansicht durch den Schließzylinder von Fig. 1 bei in eine entsperrte Stellung verdrehtem Schlüssel, auf Höhe der Drehschiebesperre, bzw. auf Höhe der vorderen Aushebescheibe, bzw. auf Höhe der hinteren Aushebescheibe,

Fig. 22 bis 24

eine Querschnittsansicht durch den Schließzylinder von Fig. 1 bei in eine Entriegelungsstellung verdrehtem Schlüssel, auf Höhe der Drehschiebesperre, bzw. auf Höhe der vorderen Aushebescheibe, bzw. auf Höhe der hinteren Aushebescheibe,

Fig. 25

einen Längsschnitt durch einen aus dem Stand der Technik bekannten Schließzylinder, und

Fig. 26

eine Explosionsdarstellung des Schließzylinders von Fig. 25.

The invention is explained below using an embodiment with reference to the drawings. They show:

Fig. 1

an exploded view of a locking cylinder according to the invention with associated key,

Fig. 2a and 2b

a perspective view of the key Fig. 1 or a front view of the key tip,

Fig. 3

a partially sectioned side view of the locking cylinder of Fig. 1 with key inserted,

Fig. 4 to 6

a cross-sectional view through the locking cylinder of Fig. 1 in a starting position with the key removed, at the level of a rotary slide lock, or at the level of a front lifting disc, or at the level of a rear lifting disc,

Fig. 7 to 9

a cross-sectional view through the locking cylinder of Fig. 1 in an initial position with the key inserted and not yet turned, at the level of the rotary slide lock, or at the level of the front lifting disc, or at the level of the rear lifting disc,

Fig. 10 to 12

a cross-sectional view through the locking cylinder of Fig. 1 with the key turned to a zero position, at the level of the rotary slide lock, or at the level of the front lifting disc, or at the level of the rear lifting disc,

Fig. 13 to 15

a cross-sectional view through the locking cylinder of Fig. 1 with the key turned to a final sorting position, at the level of the rotary slide lock, or at the level of the front lifting disc, or at the level of the rear lifting disc,

Fig. 16 to 18

a cross-sectional view through the locking cylinder of Fig. 1 with the key turned to an unlocking position, at the level of the rotary slide lock, or at the level of the front lifting disc, or at the level of the rear lifting disc,

Fig. 19 to 21

a cross-sectional view through the locking cylinder of Fig. 1 with the key turned to an unlocked position, at the level of the rotary slide lock, or at the level of the front lifting disc, or at the level of the rear lifting disc,

Fig. 22 to 24

a cross-sectional view through the locking cylinder of Fig. 1 with the key turned to an unlocking position, at the level of the rotary slide lock, or at the level of the front lifting disc, or at the level of the rear lifting disc,

Fig. 25

a longitudinal section through a locking cylinder known from the prior art, and

Fig. 26

an exploded view of the locking cylinder of Fig. 25 .

The locking cylinder 100 according to the invention of Fig. 1 comprises a cylinder housing 12, a disk housing 14 rotatably mounted in the cylinder housing 12 about a cylinder axis and a plurality of rotatably mounted adjusting disks 16 arranged in the disk housing 14 along the cylinder axis, between each of which an intermediate disk 36, in particular one which is mounted in a floating manner, is arranged. The intermediate disks 36 can be secured against rotation by means of a stop device (not shown).

Each adjusting disk 16 and each intermediate disk 36 has a central receiving opening 18, which together form a key channel 28 for inserting a key 24. In the embodiment shown, the central receiving openings 18 of the adjusting disks 16 have a rectangular cross-section, whereas the receiving openings 18 of the intermediate disks 36 have a circular cross-section.

Each adjusting disc 16 has on its outer circumference a locking recess 20 for receiving a locking pin 22 which is aligned parallel to the cylinder axis and is radially movable in a slot provided in the wall of the disc housing 14 (in Fig. 1 Each adjusting disk 16 also has, offset from the locking recess 20, at least one fixing recess 44 on its outer circumference for receiving a core pin 46 aligned parallel to the cylinder axis. The core pin 46 is also radially movable in a slot provided in the wall of the disk housing 14, which in Fig. 1 not shown.

In the disc housing 14, a front lifting disc 48 is provided - as seen in the direction of insertion A of the key 24 into the key channel 28 - which is rotatably mounted parallel to the adjusting discs 16 in the disc housing 14 and also has a central receiving opening 18 for the key 24. The front lifting disc 48 is thus located at the distal end of the disc housing 14 of the opening of the key channel 28. The front lifting disc 48 is positively coupled with respect to rotation to the key 24 inserted into the key channel 28. The front lifting disc 48 therefore always rotates when the key 24 is turned.

The same applies to a rear lifting disc 50, which is rotatably mounted in the disc housing 14 behind the package of adjusting discs 16 (ie at the proximal end of the disc housing 14) with respect to the insertion direction A. In this case, an intermediate disc 36, in particular a floating disc, is arranged between the adjacent adjusting disc 16 and the rear lifting disc 50, as Fig. 1 shows.

The disk housing 14 is also closed with a cover 52, by which the disks 16, 36, 48, 50 are protected from falling out of the disk housing 14. Like the lifting disks 48 and 50, the adjusting disks 16 and the intermediate disks 36, the cover 52 also has a central receiving opening 18 for forming the key channel 28.

In contrast to the one relating to the Fig. 25 and 26 described locking cylinder 10, in which the locking pin 22 is provided with the Fig. 25 and 26 front lifting disc (not shown), the locking cylinder 100 is the Fig. 1 a separate control element 54 in the form of a control pin is provided. The control element 54 is provided at the level of the front lifting disc 48 and thus in the insertion direction A of the key 24 adjacent to the locking pin 22 and is arranged radially movable in a separate slot of the disc housing 14 or in the same slot in which the locking pin 22 is arranged. The control element 54 can also be designed as a ball, for example. The front lifting disc 48 has a control recess 70 ( Fig. 5, 8 , 11 ) and a further tax exemption circumferential recess 108 ( Fig. 14 , 17, 20, 23 ) for receiving the control element 54.

Viewed in the insertion direction A of the key 24, a first locking element formed by a so-called sliding lock 56 and a second locking element formed by a so-called rotary sliding lock 58 are arranged in front of the disk housing 14 (i.e. offset distally) within the same plane, which are mounted so as to be movable in a translational (i.e. linear) manner in a normal plane to the cylinder axis parallel to a radial direction with respect to the cylinder axis.

How Fig. 1 shows, the disc housing 14 also has a receiving opening 18 at its front end, seen in the insertion direction A of the key 24, through which a tip 60 of the key 24 (cf. Fig. 1 and 2 ) when the key is inserted into the keyway 28. As explained below, the slide lock 56 and the rotary slide lock 58 can be actuated via the key tip 60.

An attachment 62 is placed on the front end of the disc housing 14 as seen in the key insertion direction A. The attachment 62 serves as a holder and translational guide for the sliding lock 56 and the rotary sliding lock 58 as well as a connecting link to a Fig. 1 not shown lock mechanism so that it can be operated by turning the disc housing (see the coupling section 30 in Fig. 25 ).

To hold the attachment 62 on the disk housing 14, clamps 64 are provided with which the attachment 62 can be clamped to the disk housing 14, in particular on opposite sides.

The in Fig. 2a The key 24 shown has several differently angled notches 26, which in a manner known per se have different angular positions the locking recesses 20 and the fixing recesses 44 of the adjusting disks 16. The adjusting disks 16 have a certain torsional play with respect to the respective associated notch 26 of the key 24, the extent of which depends on the angular dimension of the respective notch 26. Depending on the angular dimension of the notches 26, control sections (flanks) of the respective notches 26 and corresponding control sections (inner walls) of the central receiving openings 18 of the associated respective adjusting disks 16 engage at different times and in accordance with the coding provided in the respective notch 26, as already described above with reference to the Fig. 25 and 26 was described.

The front lifting disc 48 and the rear lifting disc 50 have the coding "6", so that the two lifting discs 48 and 50 are forcibly coupled to the key 24 with respect to rotation.

The Fig. 3 shows a longitudinal section through the disc housing 14 and in particular the two lifting discs 48, 50 with the adjusting discs 16 in between, the locking pin 22, the core pin 46, the control element 54 as well as the sliding lock 56 which interacts with the key tip 60 and the rotary sliding lock 58 which also interacts with the key tip 60.

With reference to the Fig. 4 to 24 The following describes the functionality of the locking cylinder 100 of the Fig. 1 explained. The Fig. 4 to 6 represent the situation with the key removed, which is also referred to as the initial position, in different viewing planes (each looking in the opposite direction to the key insertion direction A). Fig. 4 shows a cross-section through the locking cylinder at the level of the rotary slide lock 58 and the slide lock 56. In the initial position, the rotary slide lock 58 assumes a locking position, since the rotary slide lock 58 is in a position on the inner wall of the cylinder housing 12 provided rotary slide lock receiving recess 66. In addition, the slide lock 56 assumes a locking position because the slide lock 56 engages in a slide lock receiving recess 68 provided on the inner wall of the cylinder housing 12. The rotary slide lock 58 and the slide lock 56 are each pre-tensioned in the direction of their respective locking position by means of a spring (not shown). The slide lock 56 and the rotary slide lock 58, however, fulfill different functions because they are effective as locking elements at different times.

Fig. 7 shows the same cross-sectional plane as Fig. 4 , but with the key 24 inserted but not yet turned, i.e. in the so-called initial position. How Fig. 7 shows, is done by inserting the key 24 into the key channel 28 (cf. Fig. 1 ) the sliding lock 56 is actuated by the key tip 60 in such a way that the sliding lock 56 is forced out of the sliding lock receiving recess 68 in a direction transverse to the cylinder axis and is thereby moved from the locking position into a release position. A locking position in the initial position according to Fig. 4 The blocking of the disc housing 14, which is effective with respect to the unlocking direction D and to which the slide lock 56 is coupled in a rotationally fixed manner via the attachment 62, relative to the cylinder housing 12, caused by the slide lock 56, is therefore canceled by inserting the key 24 into the key channel 28.

How Fig. 7 also shows, is simply by inserting the key 24 into the key channel 28 (cf. Fig. 1 ) the rotary slide lock 58 is not yet actuated by the key tip 60. In the initial position with the key 24 inserted, the rotary slide lock 58 is therefore still in the locking position and therefore engages in the rotary slide lock receiving recess 66 of the cylinder housing 12.

The Fig. 5 shows in the initial position a cross section through the locking cylinder 100 of Fig. 1 at the level of the front lifting disc 48. As the Fig. 5 shows, the control element 54 is arranged in a slot provided in the disc housing 14 and engages in the control recess 70 of the front lifting disc 48 in the starting position. The control element 54 thereby fixes the disc housing 14 and the front lifting disc 48 against each other.

As the Fig. 5 also shows, the core pin 46 is also arranged in a slot of the disc housing 14 and engages in a fixing recess 72 which is formed on the outer circumference of the front lifting disc 48. The core pin 46 thus also fixes the front lifting disc 48 relative to the disc housing 14. As the Fig. 5 shows, several fixing recesses 72 lying next to one another in the circumferential direction of the front lifting disc 48 are provided on the outer circumference of the front lifting disc 48, which can also serve as chatter marks when the front lifting disc 48 is rotated relative to the core pin 46.

The Fig. 8 shows the same cross-sectional plane as the Fig. 5 , but in the initial position with the key 24 inserted and not yet turned. As a comparison of the Fig. 5 and 8 shows, inserting the key 24 into the locking cylinder does not cause any change in the cross-sectional plane shown.

The Fig. 6 shows a cross section through the locking cylinder of the Fig. 1 at the height of the rear lifting disc 50 in the starting position. The core pin 46 also engages in a fixing recess 72 of the rear lifting disc 50 in the starting position, whereby - as with the front lifting disc 48 - several fixing recesses 72 lying next to one another in the circumferential direction are also formed on the outer circumference of the rear lifting disc 50. In the same way as in the Fig. 5 and 6 for the front lifting disc 48 and the rear lifting disc 50, the core pin 46 also engages in corresponding fixing recesses 44 (cf. Fig. 1 ), which are in the adjustment discs 16 (and preferably also in the intermediate disks 36) are provided (cf. the fixing recesses 44 in Fig. 26 ), so that the core pin 46 in the starting position also fixes the adjusting disks 16 against rotation relative to the disk housing 14. The adjusting disks 16 cannot therefore be individually rotated relative to the disk housing 14 in the starting position, which already provides effective protection against picking. In addition, unintentional rotation of the adjusting disks 16 and the lifting disks 48, 50 can be prevented, which can ensure that the key 24 can be inserted into the key channel 28.

As the Fig. 6 also shows, the (in axial alignment with the control element 54 according to Fig. 5 arranged) locking pin 22 is arranged in a slot of the disk housing 14 and, in the initial position, engages in a locking pin receiving recess 74 formed on the inner wall of the cylinder housing 12. The locking pin 22 rests on the outside of the rear lifting disk 50, so that the locking pin 22, in contrast to the core pin 46, does not fix the lifting disk 50 to the disk housing 14.

The Fig. 9 shows the same cross-sectional plane as the Fig. 6 , but in the initial position with the key now inserted but not yet turned. As can be seen by comparing Fig. 6 and Fig. 9 As can be seen, no change is caused in the cross-sectional plane shown by the insertion of the key.

The Fig. 10 shows the same cross-sectional plane as the Fig. 4 and 7 , while the key 24 is turned to a so-called zero position, and the Fig. 13 shows the same cross-sectional plane again, while the key 24 is turned into a so-called sorting end position. In the corresponding way, the Fig. 11 the same cross-sectional plane as the Fig. 5 and 8 in the zero position and the Fig. 14 shows again the same cross-sectional plane as the Fig. 5, 8 and 11 in the final sorting position. The Fig. 12 shows the same cross-sectional plane as the Fig. 6 and 9 in the zero position and Fig. 15 shows again the same cross-sectional plane as the Fig. 6, 9 and 12 in the final sorting position.

In the zero position, the key 24 is rotated so far in relation to the initial position along an unlocking direction D that the disk housing 14 is initially locked against further rotational movement and now the adjusting disks 16 are released for rotational movement relative to the disk housing 14 (so-called sorting). In the final sorting position, the sorting process of the adjusting disks 16 is completed, so that the locking recesses 20 of all adjusting disks 16 are aligned with one another. In addition, in the final sorting position, the fixing recesses 44 of all adjusting disks 16 are aligned with one another as seen in the direction of the cylinder axis.

As the Fig. 10 and 13 further show, the locking element formed by the rotary slide lock 58 initially locks the disk housing 14 in the zero position in order to fix the disk housing 14 relative to the cylinder housing 12 during the sorting of the adjusting disks 16. The rotary slide lock 58 is only moved from the locking position to the release position when the final sorting position is reached, whereby the rotary slide lock 58 is translationally displaced radially inwards. In the final sorting position according to Fig. 13 the rotary slide lock 58 is thus disengaged from the rotary slide lock receiving recess 66 of the cylinder housing 12. This displacement of the rotary slide lock 58 into the release position, which is delayed compared to the displacement of the slide lock 56, is brought about by a rotary movement of the key 24.

The rotary slide lock 58 has an output flank 78 which does not come into contact with the tip 60 of the key 24 when the key 24 is inserted, i.e. in the initial position. A drive flank 80 (cf. Fig. 2a and 2b ) is formed. The output flank 78 of the rotary slide lock 58 and the drive flank 80 at the tip 60 of the key 24 are adapted for this purpose and interact in such a way that the two flanks 78, 80 only come into contact with one another when the key 24 is moved in the unlocking direction D from the initial position (cf. Fig. 7 ) initially to the zero position (cf. Fig. 10 ) and then rotated until shortly before the final sorting position. As soon as the two flanks 78, 80 have come into contact with each other, a slight further rotation of the key 24, which is transmitted via the drive flank 80 to the driven flank 78 and thus to the rotary slide lock 58, is sufficient for the rotary slide lock 58 guided in the attachment 62 to be moved radially inwards out of the rotary slide lock receiving recess 66 into the release position. The locking cylinder 100 is now in the final sorting position (cf. Fig. 13 ).

The rotary slide lock receiving recess 66 on the inner wall of the cylinder housing 12 is larger in the circumferential direction or in the direction of rotation D than the extent of the end of the rotary slide lock 58 protruding into the rotary slide lock receiving recess 66 in the circumferential direction. The rotary slide lock 58 thus has a torsional play relative to the cylinder housing 12 in its locking position. The torsional play consists of the initial position and the starting position according to Fig. 4 or Fig. 7 in unlocking direction D. After inserting the key 24, the torsional play must first be overcome by moving the key 24 and thus the disc housing 14 together with the rotary slide lock 58 into the zero position according to Fig. 10 Only then does a further rotation of the key 24, starting from the zero position into the final sorting position, cause the rotary slide lock 58 to move from the locking position into the release position. The rotary slide lock 58 can therefore, when the key is rotated in the unlocking direction D, move from the initial position which the key 24 has after being inserted into the locking cylinder 100 (cf. Fig. 1 ) into the zero position in such a way that the rotary slide lock 58 initially remains in the radially outer locking position.

The rotary slide lock receiving recess 66, which is formed on the inner wall of the cylinder housing 12, has a first stop surface 86 for the end of the rotary slide lock 58 protruding into the rotary slide lock receiving recess 66. The end of the rotary slide lock 58 comes to rest on the first stop surface 86 when the key 24 is moved in the unlocking direction D from the initial position according to Fig. 7 is rotated to the zero position, as Fig. 10 shows. The first stop surface 86 can block further rotation of the disk housing 14 in the unlocking direction D, in particular if an attempt is made to operate the locking cylinder 100 with an unsuitable, "wrong" key, via the key tip of which the rotary slide lock 58 cannot be operated during the rotation of the key from the zero position to the final sorting position and can thereby be brought out of engagement with the rotary slide lock receiving recess 66.

The rotary slide lock receiving recess 66 of the cylinder housing 12 also has a second stop surface 88 opposite the first stop surface 86, against which the end of the rotary slide lock 58 protruding into the rotary slide lock receiving recess 66 rests when the key is removed (cf. the Fig. 4 and 7 ). The second stop surface 88 blocks rotation of the rotary slide lock 58 and thus of the disk housing 14 against the unlocking direction D beyond the starting position. The starting position is thus defined against the unlocking direction D in particular by the stop of the rotary slide lock 58 on the second stop surface 88 of the cylinder housing 12 and in the unlocking direction D by the stop of the slide lock 56 on a third stop surface 90 of the cylinder housing 12, which delimits the slide lock receiving recess 68 in the unlocking direction D.

In connection with the actuation of the rotary slide lock 58, the special design of the key tip 60 will be explained in more detail below.

As mentioned, the key 24 for operating the rotary slide lock 58 has the tip 60 on its shaft 81, which interacts with the rotary slide lock 58 when the key 24 is turned. As the Fig. 2a shows, the shaft 81 has two broad sides 84 and two narrow sides 82, and the key or shaft tip 60 accordingly has two broad sides 84a, two narrow sides 82a and one end face 85.

Each broad side 84 of the shaft 81 has a plane 92 in which the outer surface of the relevant broad side 84 lies. The plane 92 thus covers the outer elements or surfaces of the broad side 84 of the shaft 81. Recesses, such as one or more longitudinal grooves in the broad side 84, are thus set back from the plane 92 towards the key axis. In Fig. 2a only the level 92 of the upper broadside 84 in the illustration is shown.

On each broad side 84a of the shaft tip 60, a flattening 94 is provided relative to the respective plane 92 of the corresponding shaft broad side 84. The flattening 94 of the upper broad side 84a is rotationally symmetrical by 180° relative to the key longitudinal axis to the corresponding flattening on the lower broad side 84a of the key of the Fig. 2a designed so that the key 24 can be used as a reversible key. The respective flattening 94 extends in the transverse direction, ie viewed transversely to the key axis, only over a part of the corresponding broad side 84a of the shaft tip 60, while another part of the corresponding broad side 84a of the shaft tip 60 forms the said drive flank 80 for actuating the rotary slide lock 58 and preferably lies in the plane 92 of the corresponding shaft broad side 84. The drive flank 80, as explained above, moves from the zero position to the final sorting position with the output flank 78 of the rotary slide lock when the key 24 is turned. 58 in order to move the rotary slide lock 58 into the release position (cf. Fig. 13 ). However, this requires that the output flank 78 of the rotary slide lock 58 (in its locking position) is close enough to the axis of rotation of the inserted key 24 (which corresponds to the cylinder axis and the longitudinal axis of the key). The respective flattening 94 on the shaft tip 60 enables the key 24 to be in the initial position of the locking cylinder 100 ( Fig. 1 ) can nevertheless be inserted into the key channel 28 without the shaft tip 60 striking the rotary slide lock 58, which extends relatively close to the cylinder axis, and in particular its output flank 78. This is shown in the Fig. 7 and 10 in which the flattening 94 of the shaft tip 60 is arranged directly adjacent to and parallel to the section of the rotary slide lock 58 having the output flank 78. Within the limits specified by the key channel 28 (maximum cross-sectional dimension of the shaft tip 60, ie maximum extent of the narrow sides 82a and the wide sides 84a), the explained delayed rotary actuation of the rotary slide lock 58 (relative to the actuation of the slide lock 56) is thus made possible with sufficient stability of the shaft tip 60. This rotary actuation takes place in that the drive flank 80 of the shaft tip 60, which is arranged eccentrically with respect to the cylinder axis, executes a tangential movement (ie is pivoted at a distance around the cylinder axis).

In the area of the respective flattening 94, the broad side 84a of the shaft tip 60 is set back with respect to the plane 92 of the broad side 84 of the shaft 81. Fig. 2a and 2b In the exemplary key 24 shown, the flattening 94 extends in the longitudinal direction, ie viewed in the direction of the key axis, over the entire broad side 84a of the shaft tip 60. In the transverse direction, however, the flattening 94 extends over a part of the broad side 84a, which takes up approximately 70% of the width of the broad side 84a of the shaft tip 60, while the drive flank 80 extends in the transverse direction only over approximately 30% of the width of the broad side 84a. The respective flattening 94 is - as in Fig. 2a and 2b shown - with respect to the plane 92 of the corresponding shaft broadside 84 is inclined in sections, wherein the inclination angle between the respective flattening 94 and the plane 92 is open in a direction transverse to the key longitudinal axis (and not along the key longitudinal axis). In other words, the respective flattening 94 is inclined relative to the corresponding shaft broadside 84 with respect to an axis that runs along or parallel to the key longitudinal axis.

The flattened area 94 can have a smooth surface, so that no depressions (such as a hole) and/or elevations are formed on it. Alternatively, however, at least one hole and/or at least one elevation can be provided on the flattened area 94 (not shown). The flattened area 94 can in particular run parallel, or obliquely, or in sections parallel and in sections obliquely to the plane 92 of the corresponding shaft broad side 84. The flattened area 94 can, for example, be inclined relative to the plane 92 of the shaft broad side 84 by an angle that can be in the range between 2 and 25 degrees. In particular, the flattened area 94 can also have an at least slightly curved contour when viewed transversely to the key axis. In the embodiment according to Fig. 2b the respective flattening 94 is concavely curved in a direction transverse to the key axis.

As in the Fig. 2a As can also be seen, the narrow sides 82a of the shaft tip 60 run towards each other in a roof-like manner towards the front side 85. The narrow sides 82a thus run tapered obliquely towards the front side 85.

In addition, the narrow sides 82a of the shaft tip 60 taper at the end of the shaft tip 60 facing away from the front side 85, so that the tip 60 is separated from the rest of the shaft 81 by a circumferential notch 96 on the narrow sides 82a. This notch 96 can be used to insert a tool during the transition from the starting position ( Fig. 4 ) to the starting position ( Fig. 7 ) the sliding lock 56 engages. Viewed from the key tip 60, behind the notch 96 a further, second circumferential notch 98 may be formed on the narrow sides 92 of the shaft 81, into which a locking disk 102 associated with the second notch 98 engages when the key 24 is turned (cf. Fig. 1 ). If an unsuitable key without a corresponding second notch 98 is used, the locking disk 102 can block rotation of the key in the locking cylinder 100. The security against manipulation can thus be increased.

In the following, the further actuation of the locking cylinder 100 starting from the zero position will be explained again.

How Figure 11 shows, the control element 54 in the zero position comes out of engagement with the control recess 70 of the front lifting disc 48 by bringing the control element 54 radially outward into engagement with a control element receiving recess 104 which is formed on the inside of the cylinder housing 12. As a result, the disc housing 14 is fixed against rotation on the cylinder housing 12, whereas the fixation of the front lifting disc 48 on the disc housing 14 caused by the control element 54 is canceled.

As the Figure 11 further shows, the core pin 46 is also pushed radially outwards from the fixing recess 72 of the front lifting disc 48 in the zero position, so that the core pin 46 comes into engagement with a core pin receiving recess 106 provided on the inner wall of the cylinder housing 12. A blockage of the rotation of the front lifting disc 48 relative to the disc housing 14 caused by the core pin 46 is thus removed. In contrast, the core pin 46 fixes the disc housing 14 against rotation on the cylinder housing 12 due to the engagement of the core pin 46 in the core pin receiving recess 106.

How Figure 12 shows, the core pin 46 also comes out of engagement with the corresponding fixing recess 72 with respect to the rear lifting disc 50 and into engagement with the core pin receiving recess 106, which can extend, for example, in the form of an elongated groove over substantially the entire length of the inner wall of the cylinder housing 12. The fixation of the rear lifting disc 50 with respect to the disc housing 14 caused by the core pin 46 is canceled.

In a corresponding manner, the core pin 46 also comes out of engagement with the fixing recesses 44 of the adjusting disks 16, so that in the zero position the blocking of the adjusting disks 16 relative to the disk housing 14 is removed and the adjusting disks 16 are now released for sorting. This sorting is now carried out, as explained, by the interaction of the notches 26 of the key 24 with the inner walls or boundaries of the receiving openings 18 of the adjusting disks 16.

Fig. 13 shows the final sorting position after the rotary slide lock 58 has been moved into the release position by a rotary movement of the key tip 60 as explained.

As the Figure 14 shows, the front lifting disc 48 is rotated in the final sorting position such that the circumferential recess 108 provided on the outer circumference of the front lifting disc 48 is radially aligned with the control element 54. In addition, the fixing recess 72 is radially aligned with the core pin 46.

In the final sorting position, the adjusting disks 16 are sorted. In particular, the locking recesses 20 of the adjusting disks 16 (cf. Fig. 1 ) and accordingly also the locking recess 20 of the rear lifting disc 50 are aligned with each other in the direction of the cylinder axis and arranged radially inward with respect to the locking pin 22. In addition, in the final sorting position, the Fixing recesses 44 of the adjusting discs 16, in the same way as the fixing recess 72 of the rear lifting disc 50 according to Figure 15 , arranged radially inward with respect to the core pin 46 and aligned with one another when viewed in the direction of the cylinder axis.

The Figures 16, 19 and 22 show the same cross-sectional plane as the Fig. 4, 7 , 10 and 13 However, the Fig. 16 the key 24 is in a position opposite to the sorting end of the Fig. 13 further rotated in unlocking direction D, the so-called unlocking position. Fig. 19 the key 24 is in a so-called unlocked position, and when Fig. 22 the key 24 is in the unlocked position.

The Fig. 17, 20 and 23 show the same cross-sectional plane as the Fig. 5, 8 , 11 and 14 . The Fig. 17 to the unlocked position, whereas the Fig. 20 the unlocked position and the Fig. 23 the unlocking position. Accordingly, the Fig. 18, 21 and 24 the same cross-sectional plane as the Fig. 6, 9 , 12 and 15 . The Fig. 18 shows the situation in the unlocked position, whereas the Fig. 21 shows the unlocked position. The Fig. 24 also shows the situation in the unlocked position.

As can be seen by comparing the Fig. 14 and 17 As can be seen, when the key 24 is turned further in the unlocking direction D from the final sorting position, both the control element 54 and the core pin 46 are initially pushed radially inwards. The core pin 46 thereby comes into engagement with the fixing recess 72 of the front lifting disc 48 or the rear lifting disc 50, which is located radially inside the core pin 46. Furthermore, the control element 54 comes into engagement with the circumferential recess 108 of the front lifting disc 48 and disengages from the control element receiving recess 104 formed in the cylinder housing 12. By moving the core pin inwards 46 and the control element 54, the front lifting disc 48 is fixed to the disc housing 14.

As is particularly the case in the Figures 11, 14 and 17 As can be seen, the front lifting disc 48 has a stop 110 on the outer circumference, which when the sorting end position is reached according to the Figure 14 comes into contact with a counter stop 112 provided on the disc housing 14 (a corresponding stop is also provided on the rear lifting disc 50). By further turning the front lifting disc 48 and rear lifting disc 50 coupled with the key 24 in the unlocking direction D from the final sorting position according to Fig. 14 The disk housing 14 is thus moved due to the interaction between the stop 110 and the counter stop 112. The disk housing 14 presses the core pin 46 against a core pin guide bevel 114, which limits the core pin receiving recess 106 as seen in the unlocking direction D and by means of which the core pin 46 is pressed into the fixing recesses 72 of the lifting disks 48, 50 and into the fixing recesses 44 of the adjusting disks 16 at a precisely defined angle of rotation (cf. Fig. 17 and 18 ).

In the corresponding manner, when the disk housing 14 is rotated out of the final sorting position, the disk housing 14 presses the control element 54 against a control element guide bevel 116 which delimits the control element receiving recess 104 as seen in the unlocking direction D, through which the control element 54 is pressed radially inwards into the circumferential recess 108 of the front lifting disk 48 at a defined angular position (cf. Fig. 17 ). This allows the angular position of the disc housing 14 to be defined with particularly high accuracy, in which (for the subsequent unlocking) the disc housing 14 is decoupled from the cylinder housing 12 and coupled with the front lifting disc 48 (and thus with the key 24).

As with reference to the Figure 15 As shown, the locking pin receiving recess 74 of the cylinder housing 12 in the final sorting position offers a greater torsional play (in particular in the unlocking direction D) compared to the core pin receiving recess 106 and the control element receiving recess 104, so that the locking pin 22 is initially not pushed radially inwards into the locking recess 20 of the rear lifting disk 50 and accordingly into the locking recesses 20 of the adjusting disks 16 when the disk housing 14 is rotated further in the unlocking direction D from the final sorting position (cf. Fig. 18 ).

As the Fig. 18 and 21 show, the locking pin 22 only comes into contact with a locking pin guide bevel 118 that limits the locking pin receiving recess 74 in the unlocking direction D when the unlocking position is reached. The locking pin guide bevel 118 pushes when the disc housing 14 is rotated further from the unlocking position to the unlocked position according to Fig. 21 the locking pin 22 radially inwards so that the locking pin 22 engages with the locking recesses 20 of the rear lifting disc 50 and the adjusting discs 16. The key 24 can then be moved together with the disc housing 14 and the discs 16, 48, 50 into the unlocking position according to the Fig. 22, 23 and 24 be rotated further in order to actuate a locking mechanism by means of the attachment 62, as explained.

In the case of the locking cylinder 100, according to the above statements, it can thus be achieved in a simple manner that when the disk housing 14 is rotated by means of the key 24 out of the final sorting position and in the unlocking direction D, the core pin 46 firstly engages the fixing recesses 72 of the lifting disks 48, 50 and the fixing recesses 44 of the adjusting disks 16 (cf. Fig. 1 ) and thereby fixes the adjusting disks 16 relative to each other and to the disk housing 14, and that only then (due to a further rotation of the disk housing 14) the locking pin 22 penetrates into the locking recesses 20 in order to lock the disk housing 14 for a further Twisting to release it into the unlocking position. Due to the different torsional play explained or the defined temporal sequence explained, the locking pin 22 cannot be pushed radially inwards with the aid of the locking pin guide bevel 118 at a time when the adjusting disks 16 can still be rotated separately (e.g. using a picking tool). This prevents the respective coding of the individual adjusting disks 16 from being scanned.

To lock, turn the key 24 from the unlocking position according to the Fig. 22, 23 and 24 against the direction of rotation D to the initial position. The sequence and interaction of the individual elements of the locking cylinder 100 are clear from the above description.

The front lifting disc 48 has a second stop 120 on its outer circumference, which is actuated when the front lifting disc 48 is turned back from the end sorting position (cf. Fig. 14 ) against the unlocking direction D, i.e. in the locking direction, when the zero position is reached, comes into contact with a second counter-stop 122 provided on the disc housing 14 (cf. Fig. 11 ). A corresponding stop is also provided on the rear lifting disc 50. By turning the lifting discs 48, 50 back from the zero position in the locking direction, the disc housing 14 can be rotated due to the interaction between the second stop 120 and the second counter stop 122 in order to force the control element 54 and the core pin 46 radially inwards (see in particular the Fig. 8 and 11 ).

list of reference symbols

10, 100

locking cylinder

12

cylinder housing

14

disc housing

16

adjustment disc

18

receiving opening

20

locking recess

22

locking pin

24

Key

26

incision

32

slot

34

locking pin recess

36

intermediate disc

38, 38a

circumferential recess

40

stop section

42

projection

44

fixing recess

46

core pin

48

front lifting disc

50

rear lifting disc

52

Lid

54

control

56

sliding lock

58

rotary sliding barrier

60

key tip

62

essay

64

bracket

66

rotary sliding lock receiving recess

68

sliding lock receiving recess

70

tax recess

72

fixing recess

74

locking pin recess

78

output flank

80

drive flank

81

shaft

82, 82a

narrow side

84, 84a

broadside

85

front side

86

first stop surface

88

second stop surface

90

third stop surface

92

level

94

flattening

96

notch

98

second notch

102

locking disc

104

control element recess

106

core pin receiving recess

108

circumferential recess

110

stop

112

counterattack

114

core pin guide bevel

116

control element guide bevel

118

locking pin guide bevel

120

second attack

122

second counterattack

A

insertion direction

D

unlocking direction

Claims (15)

1. A lock cylinder comprising

   a cylinder housing (12);

   a disk housing (14) rotatably supported about a cylinder axis in the cylinder housing (12);

   a plurality of rotatably supported disk tumblers (16) arranged along the cylinder axis in the disk housing (14), wherein each disk tumbler (16) has a reception opening (18) for a key (24); and

   a blocking element (58) which is arranged in front of the disk tumblers (16), viewed in a key introduction direction (A), and which is rotationally fixedly coupled to the disk housing (14),

   wherein the blocking element (58) is configured to adopt a blocking position in which the blocking element (58) blocks the disk housing (14) against a rotation relative to the cylinder housing (12) by the blocking element (58) engaging into a reception recess (66) of the cylinder housing (12), characterized in that

   the blocking element (58) has a rotational clearance relative to the cylinder housing (12) in the blocking position, with the blocking element (58) further being configured, after introduction of the key (24) into the lock cylinder, to be moved by a rotation of the introduced key (24) in an unlatching direction (D), only after overcoming the rotational clearance, out of the blocking position into a release position in which the blocking element (58) is out of engagement with the reception recess (66).
2. A lock cylinder according to claim 1,
   characterized in that
   the blocking element (58) has a driven flank (78) which cooperates with a drive flank (80) formed at the tip (60) of the key (24) such that the blocking element (58) is moved out of the blocking position into the release position by a rotation of the key (24) in the unlatching direction (D).
3. A lock cylinder according to claim 2,
   characterized in that
   the driven flank (78) of the blocking element (58) and the drive flank (80) at the tip (60) of the key (24) are adapted such that the two flanks (78, 80) only contact one another when the key (24) is rotated into at least one first rotational position from an initial position which the key (24) adopts after an introduction into the lock cylinder (100).
4. A lock cylinder according to claim 3,
   characterized in that
   the driven flank (78) of the blocking element (58) and the drive flank (80) at the tip (60) of the key (24) are adapted such that the blocking element (58) moves out of the blocking position into the release position, while the key (24) is rotated from the first rotational position in the unlatching direction (D) into a second rotary position.
5. A lock cylinder according to any one of the claims 2 to 4,
   characterized in that
   the reception openings (18) of the disk tumblers (16) form a keyway (28) in a starting position of the lock cylinder (100), with the driven flank (78) of the blocking element (58) being arranged outside the keyway (28).
6. A lock cylinder according to any one of the preceding claims,
   characterized in that
   the tip (60) of the key (24) has a cross-sectional shape having two narrow sides (82a) and two broad sides (84a) which are longer than the narrow sides, with the blocking element (58) being drivable by means of one of the broad sides (82a) of the key tip (60) to move out of the blocking position into the release position.
7. A lock cylinder according to claim 1,
   characterized in that

   the blocking element (58) can be co-rotated on a rotation of the key (24) in the unlatching direction (D) from an initial position which the key adopts after the introduction into the lock cylinder (100) into a first rotational position such that the blocking element (58) first remains in the blocking position;
   or in that

   the reception recess (66) of the cylinder housing (12) has a first abutment surface (86) for an end of the blocking element (58) projecting into the reception recess (66), which first abutment surface (86) the end of the blocking element (58) comes into contact with when the key (24) is rotated in the unlatching direction (D) from an initial position which the key (24) adopts after the introduction into the lock cylinder (100) into a first rotational position, with the first abutment surface (86) blocking a further rotation of the blocking element (58) in the unlatching direction (D).
8. A lock cylinder according to claim 7,
   characterized in that
   the reception recess (66) has a second abutment surface (88) for the end of the blocking element (58) projecting into the reception recess, with the end of the blocking element (58) contacting the second abutment surface (88) and the second abutment surface (88) blocking a rotation of the blocking element (58) against the unlatching direction (D) when the key (24) is removed from the lock cylinder (100).
9. A lock cylinder according to any one of the preceding claims,
   characterized in that

   the blocking element (58) is displaceably supported in a straight line in a normal plane to the cylinder axis;
   and/or in that

   the blocking element (58) is preloaded in the direction of the blocking position;
   and/or in that

   a further blocking element (56) is arranged in front of the disk tumblers (16), viewed in the key introduction direction (A), and is rotationally fixedly coupled to the disk housing (14), with the further blocking element (56) adopting, when the key (24) is removed from the lock cylinder (110), a blocking position in which the further blocking element (56) engages into a further reception recess (68) of the cylinder housing (12), and with the further blocking element (56) being movable out of engagement with the further reception recess (68) and thus into a release position by introducing the key (24) into the lock cylinder (100).
10. A key or key blank for a lock cylinder (100) according to any one of the preceding claims, comprising a shaft (81) whose tip (60) is adapted for cooperation with a blocking element (58) provided in the lock cylinder (100), wherein the shaft (81) has two broad sides (84) and two narrow sides (82), and wherein the shaft tip (60) has two broad sides (84a), two narrow sides (82a) and one end face (85),
    characterized in that
    a flattened portion (94) is provided set back relative to a plane (92) of the broad side (84) of the shaft (60) at at least one broad side (84a) of the shaft tip (60).
11. A key or a key blank according to claim 10,
    characterized in that

    the flattened portion (94) is formed along the key axis over the total broad side (84a) of the shaft tip (60);
    and/or in that

    the flattened portion (94) only extends over a part of the broad side (84a) of the shaft tip (60) in a direction transverse to the key axis, while another part of the broad side (84a) of the shaft tip (60) lies in the plane (92) of the broad side (84) of the shaft (60).
12. A key or a key blank according to claim 10 or 11,
    characterized in that

    the flattened portion (94) extends in parallel with the plane (92) of the broad side (84) of the shaft (81); or

    the flattened portion (94) extends obliquely to the plane (92) of the broad side (84) of the shaft (81); or

    the flattened portion (94) extends sectionally in parallel with and sectionally obliquely to the plane (92) of the broad side (84) of the shaft (81).
13. A key or a key blank according to any one of the claims 10 to 12, characterized in that

    the flattened portion (94) is inclined by a predefined angle relative to the plane (92) of the broad side (84) of the shaft (81), wherein the angle is preferably in a range from 2 to 25 degrees, further preferably in a range from 5 and 20 degrees, and even further preferably in a range from 10 to 15 degrees;
    and/or in that

    a respective flattened portion (94) is provided at each of the two broad sides (84a) of the shaft tip (60), with the two flattened portions (94) being formed rotationally symmetrical to one another;
    and/or in that

    the two narrow sides (82a) of the shaft tip (60) extend in a tapering and oblique manner in the direction of the end face (85).
14. A key or a key blank according to any one of the claims 10 to 13, characterized in that
    the shaft tip (60) is set off from the remaining part of the shaft (81) by a peripheral notch (96) at the narrow sides (82) of the shaft (81), with the notch (96) preferably having a spacing from the front end of the shaft tip (60) which amounts to between 1 mm and 3 mm.
15. A key or a key blank according to claim 14,
    characterized in that
    a further peripheral notch (98) is formed at the narrow sides (82) of the shaft (81) in a front part of the shaft (81) disposed in the vicinity of the shaft tip (60), with the further notch (98) preferably having a spacing from the front end of the shaft tip (60) which amounts to between 3 mm and 5 mm.

Images