CYLINDER LOCK

Description

[0001] The invention relates to a cylinder lock with a cylinder core rotatable about a longitudinal axis in a cylinder housing, comprising a key channel for inserting a coded key.

[0002] Such cylinder locks are known and are designed to assume a release state in which the rotation of the cylinder core relative to the cylinder housing is released when a key associated with the cylinder lock is inserted into the keyway, and otherwise to assume a lock state in which the rotation of the cylinder core relative to the cylinder housing is blocked.

[0003] Electromechanical cylinder locks are known for moving the cylinder lock from the release state to the locked state and back again. For example, EP 1 904 704 A1 discloses an electromechanical cylinder lock with a locking element that is movably arranged between the cylinder housing and the cylinder core and can be moved from a locking position to a release position by an electronically controllable actuator mounted on the shaft of an electric motor.

[0004] Further electronic cylinder locks are disclosed in GB 2 575 164 A, US 2009 / 013736 A1, FR 2 687 426 A1, US 6 155 089 A, US 5 542 274 A and EP 1 240 399 A1.

[0005] However, such known designs have the disadvantage that integrating the electromechanical locking device with conventional mechanical locking devices is difficult. Furthermore, there is a risk that the electromechanical locking device can be activated by an unauthorized key, leading to the release of the lock even if the key's mechanical codes were not correctly interrogated.

[0006] An object of the invention is to solve these and other problems and to provide an electromechanical cylinder lock with increased security. These and other objects of the invention are achieved according to the invention by a device according to claim 1.

[0007] A cylinder lock according to the invention comprises a mechanical locking slide which is movable in the cylinder core essentially parallel to the longitudinal axis of the cylinder core and is guided, preferably positively guided, on the inner circumference of the cylinder housing. In particular, it can be provided that the locking slide has at least one radial extension via which the locking slide is guided in at least one essentially annular housing groove running on the inner circumference of the cylinder housing. By selecting the housing groove, the locking slide can thus be forced to move in the direction of the longitudinal axis when the cylinder core is rotated. However, other implementations for guiding the locking slide can also be provided; for example, a pin can be provided on the inner circumference of the cylinder housing, which projects into the core circumference and is guided in a circumferential groove on the cylinder core and on the locking slide.It is important that rotation of the cylinder core is only possible if the locking slide can follow the course of the guide.

[0008] Furthermore, a locking element is provided which, in the locked state, positively connects the locking slide to the cylinder core in order to block its axial movement parallel to the longitudinal axis, and, in the released state, releases the locking slide from the cylinder core in order to release its axial movement parallel to the longitudinal axis.

[0009] To actuate the locking element, an electromechanical actuator is provided, which is designed to actuate the locking element in such a way that it releases the locking slide from the cylinder core upon transition from the locked state to the released state. The actuator can be designed as an electric motor; however, it can also be a linear drive or any other actuating element that can actuate the locking element. Preferably, the actuator is also designed to actuate the locking element in such a way that it positively connects the locking slide to the cylinder core upon transition from the released state to the locked state. However, this is not mandatory; the transition from the released state to the locked state can also be achieved purely mechanically, for example, by removing the key from the lock.

[0010] The actuator can be arranged at least partially, preferably mostly or entirely, in the locking slide. The locking element can be substantially cylindrical and attached to the actuator, for example, to a shaft of the electric motor. This inventive combination of an actuator, in particular an electric motor, in a movable locking slide that is positively guided in the housing groove allows for a particularly space-saving integration of the locking mechanism into existing cylinder locks.

[0011] According to the invention, it can be provided that the locking slide can, at least temporarily, assume a different axial position relative to the cylinder core in the locked state than in the released state. In particular, the housing groove or the above-mentioned groove on the cylinder core and locking slide can not be rotationally symmetrical relative to the longitudinal axis of the cylinder core. The locking slide, which is positively guided by the groove, can thus assume a different axial position relative to the cylinder core in the locked state than in the released state. Since the locking slide is positively connected to the cylinder core in the locked state and cannot move in the axial direction, this ensures that the locking slide blocks the rotation of the cylinder core in the locked state.

[0012] In other embodiments of the invention, however, it can also be provided that the housing groove is rotationally symmetrical relative to the longitudinal axis of the cylinder core.

[0013] In these embodiments, the extension of the locking slide has an extension groove that is not rotationally symmetrical to the longitudinal axis, and the cylinder housing comprises a radially inwardly projecting housing pin. The housing pin is designed to engage in the extension groove such that the locking slide is guided along the non-rotationally symmetrical extension groove. Consequently, these embodiments also achieve the effect that the locking slide can, at least temporarily, assume a different axial position relative to the cylinder core in the locked state than in the released state.

[0014] According to the invention, the extension of the locking slide extends along the circumference of the cylinder core over an angle of approximately 5° to approximately 20°, preferably approximately 12.5°. According to the invention, the locking slide has two or more axially offset extensions that are guided in two or more axially offset housing grooves of the cylinder housing.

[0015] According to the invention, it can be provided that the housing groove has a locking point projecting in the direction of the longitudinal axis, which is preferably formed in the form of a prong and a notch arranged opposite the groove edge.

[0016] In particular, it can be provided that the extension of the locking slide engages the locking point in the locked state and can only be moved out of the locking point in the released state. To enable particularly good locking, the extension can be provided with a contour with a point, for example, a triangular, oval, or diamond-shaped contour.

[0017] In those alternative embodiments in which a housing pin is guided in a non-rotationally symmetrical extension groove of the extension, it can be provided that the extension groove has a locking point projecting in the axial direction, which is preferably in the form of a prong and a notch arranged opposite it. In particular, it can be provided that the housing pin is locked in the locking point in the locked state and can only be moved out of the locking point in the released state. To enable particularly good locking, it can also be provided here that the housing pin has a contour with a tip, for example a triangular, oval, or diamond-shaped contour.

[0018] According to the invention, the locking element can be arranged on the actuator, in particular on a shaft of the motor, and has a radially projecting cam, which is designed to positively engage a recess in the cylinder core in the locked state and to leave the recess in the released state. In the locked state, the locking slide is thus positively connected to the cylinder core via the cam. In the released state, the actuator rotates the locking element such that the cam leaves the recess in the cylinder core, so that the locking slide is again axially movable relative to the cylinder core.

[0019] The actuator may be configured to rotate the locking element through an angle in the range of approximately 75° to approximately 105°, in particular approximately 90°, in order to move the locking element from the locked state to the released state and back.

[0020] According to the invention, it can be provided that a locking pin projecting into the key channel is provided in the cylinder core, which locking pin is designed to query a coding on a key inserted into the key channel.

[0021] Such a locking pin is movable perpendicular to the longitudinal axis of the cylinder core, for example, from top to bottom or from left to right. The locking pin is designed in a known manner to interrogate a code on a key inserted into the keyway. The locking pin moves along its longitudinal extension from a detent position in the locked state to a release position in the released state.

[0022] According to the invention, the locking pin blocks axial movement of the locking slide in its locked position and allows axial movement of the locking slide in its released position. The locking pin is preferably substantially cylindrical, mounted in a recess of the locking slide, and extends through a precisely fitting recess in the cylinder core into the keyway. This ensures that axial movement of the locking slide, and thus actuation of the lock, is only possible when the locking pin is in the released position.

[0023] In alternative embodiments, the locking pin may be provided in its detent position, while not impeding the axial movement of the locking slide, but blocking actuation of the locking element, and in its release position, enabling actuation of the locking element. Thus, in these embodiments, axial movement of the locking slide and actuation of the lock are only possible when the locking pin is in the release position, because only then can the locking element be actuated via the actuator.

[0024] According to the invention, the locking pin can be provided with a sensing element for engaging a key coding, for example, a curved groove. Upon insertion of an authorized key, the locking pin is moved from the locking position to the release position by guiding the sensing element in the curved groove. The sensing element can be an extension, in a known manner, which is guided, for example, in a curved groove on the key.

[0025] According to the invention, the locking pin can block rotation of the cam in the locking position and allow rotation of the cam in the release position. For this purpose, the locking pin can have a recess arranged such that it can accommodate the cam in the release position, while blocking movement of the cam in the locking position.

[0026] According to the invention, a tensioning element, for example a magnet or a coil spring, can be provided to hold the locking pin in the locking position, so that the locking pin can only be moved into the release position by inserting an authorized key. When the key is removed, the tensioning element pushes the locking pin back into the locking position.

[0027] According to the invention, the recess in the locking pin can be provided to merge into a shoulder, which mechanically moves the cam into the recess of the cylinder core during the transition from the release position to the locking position. This ensures that the locking state is assumed when the key is removed, even when the actuator is de-energized.

[0028] The transition between the recess and the shoulder may have an angle of 90° or less to ensure that when the key is removed, the locking pin presses the cam into the recess of the cylinder core without blocking.

[0029] Such a locking pin can in particular be designed such that, in the locked state, it mechanically blocks access from the key channel to the locking element.

[0030] In addition, the locking pin can incorporate electrical contacts for transferring electrical energy from an electrical energy storage device on the key to the electromechanical actuator. This is particularly advantageous when the lock does not have a power supply but is powered by an energy storage device in the key. In this case, the locking element is only moved to the release position when the authorized key is inserted, thus enabling activation of the locking element by the actuator. The actuator is then electrically activated to move the locking element's cam from the recess in the cylinder core into the recess in the locking element.

[0031] Further features of the invention emerge from the claims, the embodiments and the figures.

[0032] The invention is explained below using exemplary, non-exclusive embodiments. Figs. 1a-1c show schematic representations of a first embodiment of a cylinder lock according to the invention; Fig. 2 shows a schematic sectional view of a cylinder lock according to the invention; Figs. 3a - 3d show schematic sectional views of a cylinder lock in the release state and in the locked state; Figs. 4a - 4b show side views and sectional views of a second embodiment of a cylinder lock according to the invention; Figs. 5a - 5b show schematic sectional views of a third embodiment of a cylinder lock according to the invention; Figs. 6a - 6b show schematic three-dimensional representations and side views of the locking element and the locking pin of a cylinder lock according to the invention.

[0033] Fig. 1a shows a schematic exploded view of a first embodiment of a cylinder lock 1 according to the invention. The cylinder lock 1 comprises a cylinder core 4 which is rotatable about a longitudinal axis 3 in a cylinder housing 2 and has a key channel 5 for the insertion of a coded key 6. The cylinder lock 1 is designed to assume a release state in which the rotation of the cylinder core 4 relative to the cylinder housing 2 is released, and to assume a lock state in which the rotation of the cylinder core 4 relative to the cylinder housing 2 is blocked.

[0034] In an elongated recess of the cylinder core 4, a locking slide 7 is provided, which is movable in the direction of the longitudinal axis 3. The locking slide 7 comprises two radially outwardly directed extensions 8, each having a substantially diamond-shaped contour. Two substantially annular housing grooves 9 are provided on the circumference of the cylinder housing 2. The housing grooves 9 extend over a large part of the circumference, in the present embodiment over approximately 270°. The extensions 8 of the locking slide 7 are guided in the housing grooves 9. The housing grooves 9 each have a latching point 14 offset in the direction of the longitudinal axis 3, which here is formed in the form of a prong and a notch arranged opposite the groove edge. The extensions 8 are each designed to engage in the latching point 14 and have a diamond-shaped contour.

[0035] Furthermore, a locking element 10 is provided, which is designed to positively connect the locking slide 7 to the cylinder core 4 in the locked state and to release the locking slide 7 from the cylinder core 4 in the released state. The locking element 10 is essentially cylindrical and is arranged on a shaft of an actuator in the form of an electric motor 11 arranged in the locking slide 7.

[0036] It has a cam 15 (not visible in these figures) designed to positively engage a recess 16 in the cylinder core 4. The motor 11 is designed to actuate the locking element 10 such that, in the locked state, it positively connects the locking slide 7 to the cylinder core 4, and in the released state, it releases the locking slide 7 from the cylinder core 4. Thus, the locking slide 7 can only move axially in the elongated recess of the cylinder core 4 in the released state. In the locked state, the axial position of the locking slide 7 is fixed relative to the cylinder core 4.

[0037] The housing groove 9 is not rotationally symmetrical relative to the longitudinal axis 3 of the cylinder lock, but rather has axially offset engagement points 14. As a result, the locking slide 7 inevitably assumes a different axial position relative to the cylinder core 4 in the locked state than in the released state. In the locked state, the extensions 8 are located in the engagement points 14. The extensions 8 extend in the circumferential direction of the cylinder core 4 over an angle of approximately 12.5°.

[0038] Fig. 1b shows the cylinder lock 1 in the locked state. A key 6 that is not authorized to lock is inserted into the keyway 5. The extensions 8 of the locking slide 7 are engaged in two engagement points 14 of the housing grooves 9; the axial position of the locking slide 7 is fixed relative to the cylinder core 4. Rotation of the cylinder core 4 is not possible.

[0039] Fig. 1c shows the cylinder lock 1 in the release state. A locking key 6 is inserted into the keyway 5. The extensions 8 of the locking slide 7 can move in the housing grooves 9; the axial position of the locking slide 7 is flexible relative to the cylinder core 4. Rotation of the cylinder core 4 is possible.

[0040] Fig. 2 shows a schematic sectional view of a cylinder lock 1 according to the invention in the locked state. The cylinder lock 1 comprises a cylinder core 4 rotatable about a longitudinal axis 3 in a cylinder housing 2, with a keyway 5 for inserting a coded key 6. A locking slide 7 is provided in an elongated recess of the cylinder core 4 and is movable in the direction of the longitudinal axis 3.

[0041] The locking slide 7 comprises two radially outwardly directed extensions 8. Two essentially annular housing grooves 9 are provided on the circumference of the cylinder housing 2. The extensions 8 of the locking slide 7 are guided in the housing grooves 9. The housing grooves 9 each have a locking point 14 offset in the direction of the longitudinal axis 3, which here is formed in the form of a prong and an oppositely arranged notch in the groove edge. The extensions 8 are locked into the locking point 14 in the locking state shown.

[0042] Furthermore, a locking element 10 is provided. The locking element 10 is essentially cylindrical and arranged on a shaft of an electric motor 11 arranged in the locking slide 7. It has a cam 15 (not visible in this figure) designed to positively engage a recess 16 in the cylinder core 4. The motor 11 is designed to rotate the locking element 10 between the release state and the locked state by a rotation angle in the range of approximately 90°.

[0043] In other, not shown, embodiments of the invention, the actuator is not designed as an electric motor, but as a linear drive or another electromechanical actuating element designed to actuate the locking element accordingly. A rotation angle of less than 90° or a linear travel in the range of less than one millimeter may be sufficient for this purpose.

[0044] In the state shown here, the motor has already rotated the locking element 10 such that the cam 15 no longer engages the recess 16. However, a locking pin 17 is provided in the cylinder core 4, which projects into the keyway 5 and is horizontally movable perpendicular to the longitudinal axis 3. In this exemplary embodiment, the locking pin 17 is cylindrical, mounted in a recess in the locking slide 7, and projects through a precisely fitting recess in the cylinder core 4 into the keyway 5. The locking pin 17 is designed to query a coding on a key 6 inserted into the keyway 5 and to move along its longitudinal extent from a detent position in the locked state to a release position in the released state.

[0045] In its locked position, the locking pin 17 blocks axial movement of the locking slide 7, and in its released position, it releases axial movement of the locking slide 7. The locking position shown is the locking position in which the locking pin 17 blocks axial movement of the locking slide 7. Consequently, the locking slide 7 is axially fixed despite the release of the locking element 10.

[0046] Figs. 3a - 3d show schematic sectional views of the cylinder lock 1 from Fig. 2 in four different states. According to Fig. 3a The cylinder lock 1 is in the locked position. The projections 8 of the locking slide 7 are engaged in the engagement points 14 of the housing grooves 9. The cam 15 of the locking element 10 is positively connected to the recess 16 of the cylinder core. Furthermore, the locking pin 17 is in the locked position and prevents axial movement of the locking slide 7. The independent electromechanical and mechanical locking ensures a particularly high level of security.

[0047] According to Fig. 3b The cylinder lock 1 remains in the locked position. However, an authorized key 6 has been inserted, and the locking pin 17 has moved into the release position, so that it no longer prevents the axial movement of the locking slide 7. However, the cam 15 of the locking element 10 is still positively connected to the recess 16 of the cylinder core, so that axial movement of the locking slide 7 is not possible.

[0048] According to Fig. 3c The cylinder lock 1 is in the release position. An authorized key 6 has been inserted, and the locking pin 17 has moved into the release position. The motor 11 has been activated and has rotated the locking element 10 such that the cam 15 has left the recess 16 of the cylinder core 4. An axial movement of the locking slide 7 and rotation of the cylinder core 4 is possible.

[0049] According to Fig. 3d The cylinder lock 1 is in the release position and the cylinder core 4 has been rotated. The locking slide 7 has moved axially, as indicated by the double arrows, and the projections 8 have left the engagement points 14 of the housing grooves 9.

[0050] Figs. 4a - 4b show side views and sectional representations of a second embodiment of a cylinder lock 1 according to the invention. In this embodiment, the extension 8 of the locking slide 7 comprises an extension groove 12 that is not rotationally symmetrical to the longitudinal axis 3. Here, the extension groove 12 has a V-shape and is cut into the extension 8 over only a small angular range of approximately 10°. The cylinder housing 2 has a radially inwardly projecting housing pin 13 that engages in the extension groove 12 in such a way that the locking slide 7 is positively guided in the extension groove 12 in the aforementioned angular range. As a result, as in the embodiments described above, the locking slide 7 assumes a different axial position relative to the cylinder core 4 in the locked state than in the released state.

[0051] In order to ensure good locking, in embodiments not shown, the extension groove 12 can have a locking point 14 offset in the direction of the longitudinal axis 3, which can be formed, for example, in the form of a tooth and a notch arranged opposite, wherein the housing pin 13 can preferably have a triangular, oval or diamond-shaped contour for engagement in the locking point 14.

[0052] Fig. 4a shows the locking position, Fig. 4b the release position with axially displaced locking slide 7. In these embodiments, too, housing grooves 9 are provided in the cylinder housing 2 for guiding the extensions 8; in the angular range of the extension 8, however, the housing groove 9 is recessed in order to enable axial displacement of the locking slide 7 according to the extension groove 12. In the specific exemplary embodiment, a mixed form is also shown, wherein the left extension 8 is guided in a non-rotationally symmetrical housing groove 9, and the right extension is generally guided in a rotationally symmetrical housing groove 9, but in the angular range of the extension 8, the extension groove 12 and the housing pin 13 take over the guidance and axial displacement.

[0053] Figs. 5a - 5b show schematic sectional views of a third embodiment of a cylinder lock 1 according to the invention. In this embodiment, the locking pin 17' is designed differently than in the embodiments described above.

[0054] Instead of influencing the axial movement of the locking slide 7, it is designed here such that it blocks actuation of the locking element 10 in its detent position and enables actuation of the locking element 10 in its release position. For this purpose, the locking pin 17' blocks rotation of the cam 15 in the detent position and has a recess 20 that allows rotation of the cam 15 in the release position. In this embodiment, the cam 15 is essentially circular in shape; the recess 16 in the cylinder core 4 for receiving the cam 15 is not shown.

[0055] The locking pin 17' is designed here as a vertically displaceable pin with a substantially rectangular cross-section and a sensing element 18 projecting into the key channel 5. The sensing element 18 is designed to engage a coding of the key 6, for example, to engage a cam groove 19. When an authorized key 6 is inserted into the key channel 5, the locking pin 17' is thus moved vertically from the locking position to the release position.

[0056] According to Fig. 5a the locking pin 17' is in the locked position, wherein the locking pin 17' is designed such that in this state it also effectively prevents access from the key channel 5 to the locking element 10. The locking pin 17' has a stepped cross-section and, on its side facing away from the key channel 5, has a stepped shape with a recessed recess 20 which merges into a shoulder 22. During the transition from the release position to the locked position, this shoulder 22 displaces the cam 15 of the locking element 10 into the recess 16 of the cylinder core 3. This effectively ensures that the locking element 10 is automatically rotated when the key 6 is removed such that the cam 15 projects into the recess 16 - even when the motor 11 itself has no power supply and would actually continue to activate the release position.In this embodiment, it is therefore basically sufficient if the motor 11 is only designed to actuate the locking element 10 during the transition from the locked state to the released state - however, the motor 11 does not necessarily have to be activated during the transition from the released state to the locked state, since the locking pin 17' ensures a corresponding rotation of the locking element 10.

[0057] According to Fig. 5b the locking pin 17' is in the release position, wherein the recess 20 of the locking pin 17' is brought into a position that in this state the cam 15 of the locking element 10 can be rotated and finds space in the recess 20.

[0058] In embodiments not shown, the locking pin 17' has electrical contacts for transmitting electrical energy from an electrical energy storage device on the key 6 to the electric motor 11. For example, an electric battery can be provided in the key blade, which supplies the motor 11 with energy when the key 6 is inserted and the locking pin 17' is moved into the correct position by the mechanical coding, for example the cam groove.

[0059] Figs. 6a - 6b show schematic three-dimensional representations and side views of the locking element 10 and the locking pin 17' of a cylinder lock 1 according to the invention, wherein further components have been hidden for better clarity. Fig. 6a shows the locking position of the locking pin 17`; Fig. 6b shows the release position of the locking pin 17'. The transition from the shoulder 22 to the recess 20 is clearly visible, which here is realized at an angle of approximately 90°. In other embodiments, the angle can be smaller, approximately 75°, to ensure that the locking pin 17' moves the cam 15 into the recess 16 of the cylinder core 4 without blocking when the key is removed.

[0060] Furthermore, the components in Figs. 6a - 6b those in Figs. 5a - 5b . Additionally shown, however, is a tensioning element in the form of a coil spring 21. This coil spring 21 serves to hold the locking pin 17' in the locking position, i.e., vertically displaced upwards, so that the locking pin 17' can only be moved into the release position by inserting an authorized key 6. Likewise, the coil spring 21 ensures that the locking pin 17' is safely moved from the release position to the locking position when the key 6 is removed.

[0061] The invention is not limited to the described embodiments but also includes further embodiments within the scope of the following patent claims. Bezugszeichen

[0062] 1Cylinder lock 2Cylinder housing 3Longitudinal axis 4Cylinder core 5Keyway 6Key 7Locking slide 8Extension 9Housing groove 10Locking element 11Electric motor 12Extension groove 13Housing pin 14Engagement point 15Cam 16Recess 17, 17`Locking pin 18Sensing element 19Curved groove 20Recess 21Coil spring 22Shoulder

Claims

1. A cylinder lock (1) having a cylinder core (4) rotatable about a longitudinal axis (3) in a cylinder housing (2), comprising a key channel (5) for inserting a coded key (6), wherein the cylinder lock (1) is designed - to assume a release state in which the rotation of the cylinder core (4) relative to the cylinder housing (2) is enabled, as well as - to assume a locking state in which the rotation of the cylinder core (4) relative to the cylinder housing (2) is blocked, characterized in that - a locking slide (7) is provided, which ∘ is movable substantially parallel to the longitudinal axis (3) in the cylinder core (4), and ∘ is guided on the inner circumference of the cylinder housing (2), - a locking element (10) is provided, which is designed ∘ to positively connect the locking slide (7) to the cylinder core (4) in the locking state, and ∘ to release the locking slide (7) from the cylinder core (4) in the release state, and wherein - an electromechanical actuator arranged at least partially in the locking slide (7), for example an electric motor (11), is provided, which is designed to actuate the locking element (10) such that it ∘ releases the locking slide (7) from the cylinder core (4) during the transition from the locking state to the release state, and preferably ∘ positively connects the locking slide (7) to the cylinder core (4) during the transition from the release state to the locking state.

2. The cylinder lock according to claim 1, characterized in that the locking slide (7) has at least one radial extension (8) which is guided in at least one substantially annular housing groove (9) running along the inner circumference of the cylinder housing (2).

3. The cylinder lock according to claim 2, characterized in that the housing groove (9) is not rotationally symmetrical relative to the longitudinal axis (3), such that the locking slide (7) can assume a different axial position relative to the cylinder core (4) in the locking state than in the release state.

4. The cylinder lock (1) according to claim 2, characterized in that - the extension (8) has an extension groove (12) that is not rotationally symmetrical to the longitudinal axis (3), wherein - the cylinder housing (2) has a radially inwardly projecting housing pin (13) which engages in the extension groove (12) in such a way that the locking slide (7) is guided in the extension groove (12), - such that the locking slide (7) can assume a different axial position relative to the cylinder core (4) in the locking state than in the release state.

5. The cylinder lock according to one of claims 1 to 4, characterized in that the extension (8) extends along the circumference of the cylinder core (4) over an angle of about 5° to about 20°, preferably about 12.5°.

6. The cylinder lock (1) according to one of claims 1 to 5, characterized in that the locking slide (7) has two or more axially offset extensions (8), which are guided in two or more axially offset housing grooves (9) of the cylinder housing (2).

7. The cylinder lock (1) according to one of claims 1 to 6, characterized in that the housing groove (9) has a latching point (14) which is offset in the direction of the longitudinal axis (3) and is preferably formed in the form of a serration and an oppositely arranged notch of the groove edge, and wherein the extension (8) for engagement in the latching point (14) preferably has a triangular, oval or diamond-shaped contour.

8. The cylinder lock (1) according to one of claims 4 to 6, characterized in that the extension groove (12) has a latching point (14) which is offset in the direction of the longitudinal axis (3) and is preferably formed in the form of a serration and an oppositely arranged notch, wherein the housing pin (13) for engagement in the latching point (14) preferably has a triangular, oval or diamond-shaped contour.

9. The cylinder lock (1) according to one of claims 1 to 8, characterized in that the locking element (10) is arranged on the actuator, for example on a shaft of a motor (11), and has a cam (15) projecting in the radial direction, which is designed - to positively engage in a recess (16) of the cylinder core (4) in the locking state, and - to leave the recess (16) of the cylinder core (4) in the release state.

10. The cylinder lock (1) according to one of claims 1 to 9, characterized in that the actuator is designed to rotate the locking element (10) between the release state and the locking state by an angle in the range of about 75° to about 105°, in particular about 90°.

11. The cylinder lock (1) according to one of claims 1 to 10, characterized in that a locking pin (17, 17') projecting into the key channel (5) and movable substantially normal to the longitudinal axis (3) is provided in the cylinder core (4), the pin being designed to read an encoding on a key (6) inserted into the key channel (5) and to move along its longitudinal extension from a latching position in the locking state to a release position in the release state.

12. The cylinder lock (1) according to claim 11, characterized in that the locking pin (17) blocks an axial movement of the locking slide (7) in its latching position and enables an axial movement of the locking slide (7) in its release position, wherein the locking pin (17) is preferably substantially cylindrical, is supported in a recess of the locking slide (7) and projects through a precisely fitting recess of the cylinder core (4) into the key channel (5).

13. The cylinder lock (1) according to claim 11, characterized in that the locking pin (17') blocks actuation of the locking element (10) in its latching position and enables actuation of the locking element (10) in its release position.

14. The cylinder lock (1) according to claim 13, characterized in that the locking pin (17') has a sensing element (18) for engaging in an encoding of the key (6), for example a cam groove (19), wherein the locking pin (17') is moved from the latching position to the release position when an authorized key (6) is inserted into the key channel (5).

15. The cylinder lock (1) according to one of claims 9 to 14, characterized in that the locking pin (17') blocks rotation of the cam (15) in the latching position, and has a recess (20) which allows rotation of the cam (15) in the release position.

16. The cylinder lock (1) according to one of claims 13 to 15, characterized in that a tensioning element, for example a magnet or a spiral spring (21), is provided which holds the locking pin (17`) in the latching position, such that the locking pin (17') can only be moved into the release position by inserting an authorised key (6).

17. The cylinder lock (1) according to claim 15 or 16, characterized in that the recess (20) of the locking pin (17') merges into a shoulder (22), which moves the cam (15) into the recess (16) of the cylinder core (3) during the transition from the release position to the latching position.

18. The cylinder lock (1) according to one of claims 11 to 17, characterized in that the locking pin (17, 17') is designed such that it prevents access from the key channel (5) to the locking element (10) in the locking state.

19. The cylinder lock (1) according to one of claims 11 to 18, characterized in that the locking pin (17, 17') has electrical contacts for transmitting electrical energy from an electrical energy storage on the key (6) to the actuator, in particular to an electric motor (11).