Cylinder lock

Abstract

A cylinder lock comprises a locking cylinder with a cylinder core held in a cylinder housing, and a lock housing with a receptacle into which the locking cylinder can be inserted along an insertion direction. The lock housing includes a locking device for locking the locking cylinder within the lock housing, which comprises a locking element biased obliquely against the insertion direction into a locking position. In the locking position, the locking element projects into the receptacle and can be retracted by the locking cylinder during insertion. Furthermore, the locking element is designed to return to the locking position after the locking cylinder has been inserted and to secure the locking cylinder in the receptacle.

Description

[0001] The invention relates to a cylinder lock comprising a locking cylinder with a cylinder core rotatably held in a cylinder housing and a lock housing with a receptacle into which the locking cylinder can be inserted along an insertion direction.

[0002] In principle, such cylinder locks can be used in a wide variety of applications to prevent unauthorized access to objects and / or unauthorized entry to buildings. For example, cylinder locks can be used on window or door handles to selectively lock or unlock the handle relative to the window frame or door leaf for opening the door or window. Cylinder locks can also be mounted in a door leaf to secure it against unauthorized opening with a bolt. Furthermore, such cylinder locks can also be designed as padlocks, for example, by guiding the shackle of a padlock through the eye of a hasp and locking the shackle to the lock body with the cylinder.

[0003] In general, such cylinder locks can, for example, have several core pins arranged in the cylinder core. These pins, together with housing pins and locking springs arranged in the cylinder housing, form individual pin tumblers. These tumblers can be selected by inserting a corresponding key into a keyway provided in the cylinder core, thus releasing the cylinder core for rotation relative to the lock housing. If the key is not inserted, at least one of the housing pins can protrude into the cylinder core, thereby locking the cylinder core against rotation relative to the cylinder housing. Furthermore, by rotating the cylinder core, a locking element can be actuated or moved, allowing the cylinder lock to be selectively released for movement relative to an installation environment or a shackle, or locked against such movement.However, electronic cylinder locks with electronic locking cylinders are also known, in which an electric drive may be provided to drive a locking element.

[0004] With such cylinder locks, the locking cylinder can be inserted into the receptacle of the lock housing, particularly during assembly, and it is then necessary to secure the locking cylinder in the receptacle against loosening from the receptacle.

[0005] On the other hand, it may also be desirable to allow an authorized user to change the lock cylinder. For example, such a change may be necessary if a key to the cylinder lock has been lost and the possibility of the lock being opened by someone who finds or steals the key needs to be prevented. Furthermore, for example, with cylinder locks used to secure rented properties or items, it may be necessary to change the lock cylinder before each rental period to counteract any attempts to open the lock using a key copied during a previous rental.

[0006] Therefore, it is an object of the invention to create a cylinder lock which provides reliable security for the locking cylinder after installation in a receptacle of a lock housing, but also allows the locking cylinder to be removed from the receptacle in principle.

[0007] This problem is solved by a cylinder lock having the features of claim 1.

[0008] The cylinder lock has a locking device for securing the lock cylinder in the lock housing, which includes a locking element pre-tensioned into a locking position. In the locking position, the locking element projects into the receptacle, and the locking element can be pushed back out of the locking position by the lock cylinder against the pre-tension when the cylinder is inserted into the receptacle. Furthermore, the locking element is designed to return to the locking position after the lock cylinder is fully inserted, due to the pre-tension, and to secure the lock cylinder against being removed from the receptacle.

[0009] Because the locking element can be pushed back from its locked position against the preload when the lock cylinder is inserted, the locking element can be forced out of a section of the lock cylinder—particularly by inserting the lock cylinder into the lock housing—so that at least a portion of the lock cylinder can pass the locking element and the lock cylinder can be inserted into the lock housing. After the lock cylinder is fully inserted, the locking element can then snap back into its locked position due to the preload, in order to engage the section of the lock cylinder that passed the locking element and thus secure the lock cylinder in the lock housing.In particular, it may also be provided that the locking means in the locking position can be pushed back from the locking position by a movement of the locking cylinder along the insertion direction for inserting the locking cylinder into the lock housing, but not by a movement of the locking cylinder inserted into the lock housing in the opposite direction to the insertion direction, so that the inserted locking cylinder can be secured against removal by the locking means in the lock housing.

[0010] However, the possibility of forcing the locking element out of the locked position by a force acting along the insertion direction may, in some embodiments, also allow the locking element to be pushed back by a release element guided along the insertion direction, in order to selectively remove the lock cylinder from the lock housing. This will be explained in more detail below.

[0011] To ensure the lock cylinder is securely held in the receptacle, the lock cylinder may, in particular, have an engagement opening into which the locking element engages after the lock cylinder is inserted. Specifically, the locking element may be initially pushed out of the receptacle by the lock cylinder against the preload during insertion, so that it can re-enter the receptacle after the lock cylinder is inserted, once the engagement opening is at the same level as the locking element. For example, the locking element can then secure the lock cylinder in the receptacle by engaging behind a boundary of the insertion opening.

[0012] By being designed to return to the locking position after the locking cylinder has been fully inserted into the receptacle, the locking device can, for example, be designed to return to the locking position immediately upon reaching a intended end position of the locking cylinder and / or after or upon full insertion of the locking cylinder into the receptacle, in order to secure the locking cylinder in this end position.However, it can also be provided that the inserted lock cylinder in the receptacle is movable from a lower end position (relative to the insertion direction) to an upper end position, opposite to the insertion direction. The locking means can be designed to hold the lock cylinder in the upper end position with respect to this movement and to secure it against removal or release from the lock housing, while still allowing movement of the lock cylinder from the upper end position to the lower end position. In particular, the locking means can be retracted by movement of the lock cylinder from the upper end position to the lower end position against the preload. The force for retracting the locking means can be transmitted, for example, by an upper boundary of the aforementioned engagement opening arranged in the direction of an opening in the receptacle through which the lock cylinder can be inserted.Upon reaching the upper end position, the locking mechanism can be acted upon by a lower limit of the engagement opening to secure the lock cylinder in the receptacle in the upper end position. In such embodiments, the locking mechanism can therefore engage in the engagement opening even before the lower end position is reached, thus securing the lock cylinder against dislodging from the receptacle, while the lock cylinder can still be inserted further into the receptacle despite this engagement of the locking mechanism.

[0013] In particular, the locking cylinder can be a mechanical or an electronic locking cylinder.

[0014] A mechanical locking cylinder can, in particular, have a cylinder core rotatably held in the cylinder housing and be designed, for example, as a profile cylinder according to DIN 18252. In such a profile cylinder, the cylinder housing can have a core receiving section for receiving the cylinder core and a flange section projecting radially away from it with respect to an axis of rotation of the cylinder core, in which several housing pins and locking springs can be arranged. The housing pins and locking springs can also interact with housing pins arranged in the cylinder core to selectively release the cylinder core for rotation relative to the cylinder housing or lock it against such rotation. Such pin tumblers can, in particular, be sorted by means of an associated key when this key is inserted into a keyway of the cylinder core to then enable rotation of the cylinder core.Accordingly, the recess in the lock housing can also have a shape corresponding to the profile cylinder, so that the locking cylinder can be inserted precisely into the recess.

[0015] As an alternative to a profile cylinder, the locking cylinder can also be designed as a round or oval cylinder, with the receptacle in such embodiments also having a corresponding shape. In principle, the receptacle of the lock housing can have a shape specific to the locking cylinder to be used, enabling the locking cylinder to be inserted into the receptacle.

[0016] An electronic locking cylinder may, in particular, have an electric drive for actuating a locking element, for example, a locking cam that is movable, especially rotatable, by an electric motor of the electric drive. Such a locking cylinder may also, for example, have a radio receiver to receive control commands, especially locking or unlocking commands, for the electric drive via a radio connection, such as a Bluetooth connection, a WLAN / WiFi connection, and / or a mobile network connection. Furthermore, an electronic locking cylinder may have a control unit for processing the received control commands and for actuating the electric drive in accordance with these control commands.

[0017] As an alternative to receiving control commands via a radio link, electronic locking cylinders can also be equipped with other identification means to transmit a control command. For example, biometric verification can be used to identify a lock owner, such as by having the locking cylinder and / or cylinder lock incorporate a fingerprint sensor to verify a fingerprint. Alternatively, the locking cylinder and / or cylinder lock can have an input device for entering a release code, which, upon entry of the correct release code, activates the electric drive to open the cylinder lock.

[0018] In general, the cylinder housing of an electronic locking cylinder - as explained above for a mechanical cylinder - can also be designed, for example, according to a profile cylinder, an oval cylinder or a round cylinder and / or the receptacle can have a shape corresponding to the shape of the cylinder housing or the locking cylinder.

[0019] The lock housing can, for example, be formed by the lock body of a padlock, into which the cylinder can be inserted along the insertion direction. Furthermore, the lock housing can, for example, be formed by a window or door handle, in order to optionally secure the window or door handle against a pivoting movement relative to an installation environment, in particular a window frame or a door leaf, using the cylinder lock. It is also possible for the lock housing to be formed by a lock chamber recessed into a door leaf, in order to operate a bolt for locking the door leaf relative to a door frame using the cylinder lock.

[0020] While the locking mechanism with its pre-tensioned locking element ensures reliable securing of the lock cylinder in the receptacle after installation, the locking element's retractability by a force acting in the insertion direction also allows it to be pushed back against the pre-tension for disassembly of the lock cylinder, thus enabling its removal from the receptacle and, for example, its replacement. This will be explained in more detail below.

[0021] Further embodiments are explained in the dependent claims, the description and with reference to the figures.

[0022] In some embodiments, the locking device can be biased obliquely in the opposite direction to the insertion direction into the locking position.

[0023] In particular, the locking device can be biased obliquely opposite to the insertion direction and inwards towards the receptacle, so that, due to a force exerted on the locking device by the lock cylinder during insertion into the receptacle, it can be forced obliquely outwards against the bias and, in particular, out of the receptacle. However, since the locking device is designed to return to the locking position after the lock cylinder has been fully inserted, it can, in particular, re-engage with the receptacle after the lock cylinder has been inserted, thereby securing the lock cylinder against dislodging from the receptacle, especially against dislodging against the insertion direction.

[0024] By angling the preload of the locking device against the insertion direction, it is particularly important to ensure that the locking device cannot be pushed back against the preload by a force transmitted by the inserted cylinder and directed against the insertion direction, since the cylinder cannot transmit a force opposing the preload in this case. The locking device can be subjected to a force by the preload, which can be divided into a component opposite to the insertion direction and a component perpendicular to the insertion direction and in the direction of the receptacle. Therefore, during insertion, the cylinder can transmit a force to the locking device that opposes the component of the preload directed against the insertion direction, thus pushing the locking device back by transmitting this force.In particular, a guide and / or shape of the locking device can deflect the force transmitted by the locking cylinder in the insertion direction, enabling the locking device to be pushed back against the preload during insertion of the locking cylinder and due to the force it transmits in the insertion direction. Conversely, if the inserted locking cylinder moves out of the receptacle, a force transmitted from the locking cylinder to the locking device acts along the component of the locking device's preload against the insertion direction. Therefore, such a force cannot push the locking device back against the preload, and the engagement of the locking device in the receptacle cannot be released.Furthermore, deflection of the locking element relative to the direction of the preload can be prevented or sufficiently limited by the guide's limitations, preventing the locking element from being disengaged from the receptacle perpendicular to the insertion direction. Therefore, the locking cylinder can be securely held in the lock housing by the locking device after insertion into the receptacle. Due to the preload of the locking element, only the locking cylinder needs to be inserted into the receptacle; no further assembly steps are required to secure the cylinder in place.

[0025] In some embodiments, the locking device may be guided in a locking channel, in particular in a bore.

[0026] Furthermore, in some embodiments the locking means can be guided in a locking channel oriented obliquely against the insertion direction, in particular in a bore oriented obliquely against the insertion direction.

[0027] In particular, a compression spring can be arranged in the locking channel, which pre-tensions the locking device into the locking position. Furthermore, such a locking channel can, in particular, form a guide for the locking device in order to define the direction along which the locking device is movable in the intended, and especially oblique, orientation relative to the insertion direction, and to stabilize movements of the locking device. Moreover, such a guide for the locking device can restrict and / or prevent any deflections of the locking device relative to the intended direction of movement, in order to prevent unwanted displacement of the locking device from its receptacle by a movement perpendicular to the insertion direction.

[0028] In some embodiments, the locking element can be forced into the locking channel from its locked position by a force applied in the direction of insertion. In particular, in such embodiments, the locking element can be forced out of its locked position and into the locking channel by the insertion of the lock cylinder, thus clearing a path for the lock cylinder and enabling its insertion into the receptacle. Furthermore, in such embodiments, the locking element can be held within the locking channel during retraction from the receptacle, allowing it to be guided against the preload even during this movement.

[0029] In some embodiments, the locking cylinder may have a stop with which the locking cylinder inserted into the lock housing strikes the locking device when a force is exerted on the locking cylinder in the opposite direction to the insertion direction.

[0030] In particular, such a stop can be a limitation of the aforementioned engagement opening, which is opposite to an opening in the receptacle through which the lock cylinder can be inserted into the receptacle, and which – assuming this opening is located on the upper side of the lock housing – can be understood as a lower limitation of the engagement opening. Therefore, if the inserted lock cylinder is pulled in such embodiments, the stop or limitation of the engagement opening can strike the locking mechanism and thereby block further movement of the lock cylinder out of the lock housing.

[0031] In some embodiments, the locking element, when positioned in the locked position, can become jammed between the stop and a boundary of the locking channel due to the force exerted. Such jamming of the locking element can ultimately be made possible by the inclined orientation of the locking channel and the preload, whereby no force can be transmitted to the locking element against the preload when the lock cylinder is moved out of the receptacle. Therefore, the locking element cannot be moved out of the receptacle by a force directed against the insertion direction, but—due to a possible deflection of the force transmitted by the lock cylinder—can at most be forced perpendicular to the insertion direction, whereby movement of the locking element in this direction can be blocked by the boundary, in particular a lateral boundary, of the locking channel.A force exerted on the lock cylinder can be transmitted via the stop to the locking element engaging in the receptacle and via the locking element to the lock housing, so that the lock cylinder cannot be moved relative to the lock housing against the insertion direction when the stop strikes the locking element in the locking position.

[0032] In some embodiments, the locking channel may have a disassembly opening on a side facing away from the receptacle, through which the locking means is accessible for disassembly, wherein the locking means can be moved out of the locking position into the locking channel by disassembly and the locking cylinder can be released for removal from the receptacle.

[0033] For example, it may be provided that the locking element can be moved out of the locked position and into the locking channel by releasing or removing a preload spring, in particular a compression spring, which preloads the locking element into the locked position. Alternatively or additionally, it may also be provided that such a preload spring and the locking element can be removed from the locking channel through the disassembly opening. After releasing a preload spring or removing the locking element from the locking channel, the locking element can no longer engage in the receptacle, so that the locking cylinder can be released from the locking element for removal from the lock housing.

[0034] For example, in embodiments where the cylinder lock is integrated into a window or door handle, the disassembly opening can be provided for after pivoting the window or door handle into an open position, whereas the locking mechanism may be inaccessible in a locked position. This ensures that the locking device can only be disassembled in the open position and that access to the disassembly opening is restricted to authorized users, since access to the disassembly opening is impossible when the window or door handle is in a locked position and thus when the window or door is closed.Such a dismantling opening thus provides an easy way for the authorized user to optionally remove and, for example, replace the lock cylinder, whereas removing the lock cylinder during break-in attempts is not possible due to the dismantling opening being inaccessible when the window or door handle is in the locked position.

[0035] Alternatively or additionally, in some embodiments a release slot extending along the insertion direction can be arranged on the receptacle, wherein the locking means can be forced out of the locking position against the preload by inserting an elongated release means into the release slot.

[0036] In particular, the release slot can extend along the insertion direction and lead from an outer surface of the lock housing to the locking element. Similar to the insertion of the lock cylinder, the locking element can be pushed back out of its receptacle against the preload due to a force exerted on it by the release element in the insertion direction, thus releasing the lock cylinder for removal from the lock housing.

[0037] In particular, a flat wire bending part that can be inserted into a narrow release slot can be considered as a release device. However, in principle, any release device that is sufficiently flat to be inserted into the release slot and long enough to reach the locking device can be used, provided that the release device is also sufficiently stable to transmit the force required to retract the locking device.

[0038] The release slot can be located between an outer side of the cylinder and an inner side of the receptacle and / or the lock housing, particularly when the cylinder is already installed. Furthermore, the locking element can be forced into the aforementioned locking channel by inserting the release tool into the release slot, thereby disengaging it from the receptacle. This also allows for easy removal of the cylinder from the lock housing, for example, to replace it with a different cylinder.

[0039] In particular, the provision of such a release slot can be included in embodiments where the locking device is designed to hold the lock cylinder in an upper end position within the receptacle, but allows movement from the upper end position in the insertion direction to a lower end position, as explained above. In such embodiments, it can be provided, in particular, that the lock cylinder in the lower end position, which may be a closed position of the cylinder lock, can be blocked against movement to the upper end position, which may be an open position of the cylinder lock, by a further mechanism, whereby moving the lock cylinder from the closed position to the open position may require actuating the cylinder core and thus inserting the associated key.Therefore, to remove the lock cylinder from its receptacle, it may be necessary to first move the cylinder from the closed position to the open position by actuating the cylinder core, and then to insert the release tool into the release slot to force the locking element out of the receptacle. This also ensures that the lock cylinder can only be removed by the authorized user who possesses the corresponding key.

[0040] In some embodiments, the lock cylinder may have an engagement opening for the locking element, into which the locking element engages when the lock cylinder is inserted into the lock housing. As already explained, the locking element's engagement in this opening secures the lock cylinder against removal from the lock housing.

[0041] In some embodiments, the access opening can be formed by a screw hole in the cylinder housing. In particular, such screw holes may already be provided on the cylinder housing of a standardized locking cylinder, especially a profile cylinder, to allow, for example, the locking cylinder to be fixed in a door leaf by inserting a screw into the door leaf and into the screw hole on an opening narrow side. This secures the locking cylinder against removal from the door leaf when the door is closed and the screw is therefore inaccessible.Even in the embodiments described here, this often already provided faceplate screw bore can be used to secure the lock cylinder in the lock housing by the locking device engaging in the faceplate screw bore, so that the lock cylinder does not need to be provided with a specially manufactured engagement opening.

[0042] In some embodiments, the locking cylinder inserted into the lock housing can be movable relative to the locking element along the insertion direction between an open position and a closed position. In particular, the locking cylinder inserted into the lock housing can therefore be movable relative to the locking element in and / or against the insertion direction between the open position and the closed position. As already explained, the inserted locking cylinder can be movable within the lock housing, in particular between an upper end position and a lower end position, which can define the open and closed positions, respectively. The locking element can be designed to prevent movement of the locking cylinder against the insertion direction beyond the open position and thereby secure the locking cylinder against dislodging from its receptacle.

[0043] For example, the locking cylinder can be blocked from being removed from the receptacle by having the locking element, when the cylinder is in the open position, rest against a boundary of an engagement opening that faces away from the opening through which the cylinder can be inserted into the receptacle. Conversely, the locking element can be repelled against the preload by moving the cylinder into the closed position and, in the closed position, will not engage in the receptacle. The force required to repel the locking element can be transmitted, for example, by a boundary of the engagement opening facing the opening of the receptacle.

[0044] As an alternative to displacing the locking element by moving the lock cylinder from the open to the closed position, some embodiments may, for example, provide that the engagement opening of the lock cylinder in the insertion direction has a larger extension than the locking section of the locking element that engages in the receptacle. With such a design of the engagement opening, the locking element can rest against a boundary of the opening in the open position and thereby hold the lock cylinder in the receptacle, whereas the lock cylinder is not blocked against movement in the insertion direction and can move into the closed position without having to displace the locking element from its locked position. In such embodiments, the locking element can therefore be arranged in the locked position in both the open and closed positions.

[0045] In some embodiments, the lock cylinder can be designed as a pressure cylinder and biased into the open position opposite to the insertion direction. The locking device can be designed to block movement of the lock cylinder inserted into the receptacle beyond the open position in the opposite direction to the insertion direction. For example, in such embodiments, the lock cylinder can be axially connected to a locking element that, in the closed position, can extend beyond the lock housing to prevent movement of the lock housing relative to its surroundings. In the open position, however, such a locking element can be moved into the lock housing to allow movement of the lock housing and, for example, a pivoting window or door handle.The locking device can therefore be designed to secure the locking cylinder against being released from the receptacle and to hold the locking cylinder in the open position, but to allow further movement of the locking cylinder into the receptacle to move the locking cylinder into the closed position.

[0046] In some embodiments, the locking mechanism can be pushed back against the preload by moving the lock cylinder from the open position to the closed position. Therefore, in some embodiments, the locking mechanism may not be in the locked position and / or may not project into the receptacle when the lock cylinder is in the closed position.

[0047] In some embodiments, the cylinder lock may have a blocking element designed to block the locking cylinder inserted into the receptacle against movement into the open position when in the closed position.

[0048] In such embodiments, a blocking device can be provided in addition to the locking device to prevent the lock cylinder from moving into the open position in the closed position, while the locking device can be specifically designed to prevent the lock cylinder, once inserted into the receptacle, from moving beyond the open position in the opposite direction to its insertion. Therefore, in such embodiments, the locking cylinder must first be released by the blocking element from moving from the closed position into the open position before it can be moved into the open position and held there by the locking device against removal from the lock housing.

[0049] In embodiments where the locking device can be moved out of its receptacle by the authorized user, for example by disassembling the locking device and / or by inserting a release device into a release slot, in order to remove the lock cylinder, such removal is only possible with a cylinder lock featuring this type of blocking device if the lock cylinder has first been released to move from the closed to the open position. Since this may require proper actuation of the cylinder core, such release can only be performed by the authorized user, meaning that ultimately, removing the lock cylinder from the lock housing is also only possible for the authorized user.

[0050] In particular, removing the lock cylinder from the lock housing, starting from a fully inserted or closed lock cylinder, can thus include releasing the blocking by the blocking element to move the lock cylinder into the open position and then pushing back the locking device to release the lock cylinder for removal from the lock housing, in order to then be able to remove the lock cylinder from the lock housing.

[0051] In some embodiments, the lock cylinder may have a locking lug which is movable, in particular rotatable, between a locked and an unlocked position by actuating the lock cylinder. In the locked position, the locking lug may project laterally beyond the cylinder housing, and the blocking element may be arranged in alignment with the locking lug opposite to the insertion direction when the lock cylinder is in the closed position and the locking lug is in the locked position.

[0052] By positioning the blocking element in line with the locking cam when the cylinder is in the closed position and the locking cam is in the locked position, it is possible to ensure that the cylinder, when attempting to move it to the open position or out of the lock housing, will strike the blocking element, thus preventing any such movement. Therefore, to move the cylinder against its insertion direction, it is necessary to displace the locking cam from the blocking element by actuating the cylinder. The cylinder, along with the locking cam, can then be moved past the blocking element against its insertion direction into the open position.

[0053] For example, in a mechanical locking cylinder, the locking lug may be fixedly connected to a cylinder core rotatably arranged in the cylinder housing and movable between the unlocked and locked positions by rotating the cylinder core. The locking lug may also project radially beyond the cylinder core so that, in the locked position, it is aligned with the blocking element when viewed along the insertion direction. In the unlocked position, the locking lug may be aligned, in particular, with the cylinder housing and, for example, a flange section of a profile cylinder housing.As already explained, a cylinder core of a mechanical cylinder can be actuated and rotatable, in particular by an associated key acting as an identification means, so that the key can ultimately also transmit a rotation to the locking lug to move the locking lug between the locking position and the unlocking position.

[0054] In an electronic locking cylinder, the locking cam can be moved, and in particular, also rotated, by an electric drive. For this purpose, the locking cam can be connected, for example, directly or, in particular, indirectly—via a gearbox—to a motor shaft of an electric motor of the drive, so that the electric motor can be driven into a rotary motion between the locked and unlocked positions. Furthermore, in an electronic locking cylinder, the locking cam can also be moved translationally between the locked and unlocked positions, for which a corresponding conversion of the rotary motion of a motor shaft of an electric motor of an electric drive may be provided.Such a movement also allows the locking lug to be arranged either in or out of alignment with the blocking element, in order to optionally secure the locking cylinder against removal from the lock housing or to release it for such removal.

[0055] Furthermore, in some embodiments, the locking cam can be moved out of alignment with the blocking element by moving it into the unlocked position, and the lock cylinder can be moved from the closed position to the open position with the locking cam in the unlocked position. As already explained, the lock cylinder can thus be released for movement into the open position by properly operating the lock cylinder, so that it can then be removed and / or replaced, if necessary, by an authorized user by pushing back the locking mechanism from the lock housing.

[0056] Furthermore, in some embodiments, the blocking element can be forced back into the locked position against a preload and / or elastically deformable by moving, in particular rotating, the locking lug into the locked position when the lock cylinder is in the open position. In such embodiments, after moving the locking lug out of alignment with the blocking element and subsequently moving the lock cylinder into the open position, the blocking element can be forced back into the locked position by moving the locking lug, thus enabling the locking lug to move into the locked position.

[0057] In particular, it can also be provided that a key assigned to a cylinder core of a mechanical locking cylinder can only be removed from the cylinder core when the locking cam is in the locked position, so that after moving the locking cylinder from the closed position to the open position, the cylinder core must first be turned back to its initial position, in which the locking cam is positioned in the locked position, before the key can be removed. This rotation of the cylinder core while it is in the open position can be made possible by a preload and / or elastic deformability of the blocking element.

[0058] In some embodiments, the blocking element can be designed to come into alignment with the blocking element as a result of moving the locking cylinder from the open position to the closed position with the locking lug positioned in the locking position, due to the preload and / or the preceding elastic deformation.

[0059] In such embodiments, it can be provided that, after moving the lock cylinder into the open position and moving the locking cam into the locking position, it only needs to be moved back into the closed position in the insertion direction to be automatically secured against movement into the open position by the locking element snapping into place. Therefore, in such embodiments, a user only needs to actuate the lock cylinder to move it from the closed to the open position, for example by inserting a key to turn a cylinder core. To subsequently lock the cylinder in the closed position, it may be sufficient to simply push the lock cylinder back into the closed position.

[0060] In some embodiments, the blocking element can be designed as a leaf spring that can be pushed back into the locked position by moving the locking cam when the cylinder is in the open position. The concepts described above can be implemented simply by means of such a leaf spring, in particular by making the leaf spring elastically deformable so that, as a result of the cylinder moving into the closed position, it can snap back against the elastic deformation and thus block the cylinder in the closed position. In particular, the leaf spring can be arranged such that, when the cylinder is in the open position, the locking cam can contact and elastically deform the leaf spring during movement into the locked position.

[0061] Therefore, the blocking element described above, even independently of the additional locking provided by the locking device which is biased obliquely against the insertion direction, offers a simple way to selectively block a lock cylinder in a closed position or to release it for movement into an open position. Thus, the invention also relates, regardless of the design of a cylinder lock with a locking device, to a cylinder lock comprising a lock cylinder with a cylinder housing and a lock housing into which the lock cylinder can be inserted.Furthermore, in this cylinder lock, the locking cylinder inserted into the lock housing is movable along a direction of movement between an open position and a closed position which is further into the lock housing in the direction of movement compared to the open position, and the cylinder lock has a blocking element which is designed to block the locking cylinder in the closed position against movement into the open position, wherein the locking cylinder has a locking lug which is movable between a locking position and an unlocking position by actuating the locking cylinder, wherein the locking lug projects laterally beyond the cylinder housing in the locking position, and wherein the blocking element is arranged opposite the direction of movement in line with the locking lug when the locking cylinder is in the closed position and the locking lug is in the locked position.

[0062] In the cylinder lock according to this aspect of the invention, one or more of the features mentioned above or below in connection with a blocking element and / or a cylinder lock with a locking device may be implemented. In particular, the locking cylinder may be designed as a pressure cylinder and pre-tensioned in the open position. Furthermore, the direction of movement may correspond, in particular, to the insertion direction mentioned above.

[0063] Furthermore, the insertion direction or direction of movement can be aligned parallel to an axis of rotation about which the locking lug is rotatable. In some embodiments, the blocking element can also be arranged in line with an end face of the locking lug relative to the insertion direction or direction of movement when the lock cylinder is in the closed position and the locking lug is in the locked position. Such an arrangement of the blocking element prevents any torque from being transmitted through the blocking element to the locking lug when, during an attempt to forcibly open the cylinder lock, a tensile force is applied to the lock cylinder opposite the insertion direction or direction of movement.

[0064] In particular, the locking lug can be rotationally fixed to a cylinder core rotatably held in the cylinder housing and project radially beyond the cylinder core, with the locking lug being movable between the locked and unlocked positions by rotating the cylinder core using an associated key. However, in some embodiments, the locking cylinder can also be designed as an electronic locking cylinder, and the locking lug can be moved between the locked and unlocked positions by an electric drive of the locking cylinder. Furthermore, in some embodiments, the blocking element can be arranged axially offset from the locking lug with respect to the insertion direction or the direction of movement when the locking cylinder is in the closed position.Therefore, in such embodiments, the blocking element cannot be mechanically contacted by the locking lug when the locking lug is moved from the locking position to the unlocking position while the locking cylinder is in the closed position.

[0065] In some embodiments, the locking cylinder can be axially connected to a locking element which is designed to block movement of the lock housing relative to an installation environment, in particular in a plane perpendicular to the insertion direction, in the closed position of the locking cylinder and to release movement in the open position of the locking cylinder.

[0066] In particular, it may be provided that the locking element projects axially beyond the lock housing when the lock cylinder is in the closed position, in order to engage, for example, in a corresponding opening in the installation environment and thereby block movement of the lock housing relative to the installation environment. By moving the lock cylinder to the open position, the locking element can be inserted axially into the lock housing, in particular to allow movement of the lock housing relative to the installation environment.

[0067] As already explained, in some embodiments the locking cylinder can be designed as a mechanical locking cylinder and have a cylinder core that is rotatably held in the cylinder housing and can be operated by means of an associated key.

[0068] Alternatively, in some embodiments, the locking cylinder can be designed as an electronic locking cylinder and have an electric drive for actuating a locking element, wherein the locking cylinder can, in particular, comprise the locking element. Specifically, the locking element can be the aforementioned locking lug.

[0069] In some embodiments, the lock housing can be formed by a pivotable window or door handle. In particular, in such embodiments, the cylinder lock can be designed to selectively block or release movement of the window or door handle relative to a window frame or door leaf, in order to selectively lock or allow the opening of the window or door.

[0070] In some embodiments, the locking element can be designed as a ball which is biased in the direction of the locking position by a compression spring. In particular, a surface of the ball can allow a force exerted by the inserted lock cylinder in the insertion direction to be redirected, in order to push the locking element out of the receptacle against the bias exerted by the compression spring and to insert the lock cylinder into the receptacle.

[0071] The invention further relates to a lockable window or door handle which comprises a cylinder lock according to one of the embodiments described above.

[0072] In some embodiments of the window or door handle, the handle can, in particular, form the lock housing, wherein the locking cylinder is designed as a pressure cylinder pre-tensioned to an open position, and the locking cylinder inserted into the receptacle can be moved between a closed position and the open position along the insertion direction. Furthermore, the locking cylinder can be axially connected to a locking element, which is designed to block a pivoting movement of the window or door handle relative to an installation environment, in particular a window frame or a door leaf, in the closed position of the locking cylinder and to release it in the open position of the locking cylinder.

[0073] The window or door handle can therefore be blocked or locked against a pivoting movement relative to a window frame or door leaf, particularly by moving the locking cylinder into the closed position, and released for such a movement by moving the locking cylinder into the open position. In particular, such embodiments can also incorporate the aforementioned blocking of the locking cylinder in the closed position by a blocking element with one or more of the features described above.

[0074] Furthermore, the invention also relates to a lockable window or door handle, which comprises a cylinder lock according to one of the embodiments described above, in which a locking device is not necessarily provided, but a blocking element cooperating with a locking lug in the manner described above for blocking a locking cylinder in a closed position.

[0075] The invention is explained below by way of example using a specific embodiment with reference to the drawings.

[0076] They show: Fig. 1 is an exploded view of a cylinder lock integrated into a window handle; Figs. 2A to 2D are respective views of the cylinder lock to illustrate the insertion of a locking cylinder of the cylinder lock into a receptacle of a lock housing of the cylinder lock; Figs. 3A to 3C are respective views of the cylinder lock to illustrate the movement of the locking cylinder between a closed position and an open position. Fig. 4 shows an illustration of possibilities for removing the lock cylinder from the receptacle and Fig. 5A to 5D show respective illustrations to demonstrate locking and unlocking the lock cylinder in order to lock the lock cylinder in the closed position or to release it for movement into the open position.

[0077] Fig. 1 Figure 1 illustrates the components of a cylinder lock 11, which is integrated into a window or door handle 61 that forms a lock housing 19 of the cylinder lock 11. In particular, such a window or door handle 61 can be designed to pivot relative to a window frame or door leaf, which can form an installation environment for the cylinder lock 11, in order to selectively open or close the window or door. However, by integrating the cylinder lock 11 into the window or door handle 61, the window or door handle 61 can optionally be locked against such a pivoting movement relative to the respective installation environment to prevent the door or window from being opened.

[0078] To integrate the cylinder lock 11 into the window or door handle 61, a receptacle 17 is provided in the lock housing 19 formed by the window or door handle 61. A locking cylinder 13 can be inserted into this receptacle along an insertion direction E and is then used as a push cylinder 45. The locking cylinder 13 has a cylinder housing 55 with a core receiving section 67 in which a cylinder core 15 is rotatably mounted. The cylinder housing 55 also has a flange section 69 projecting radially from the core receiving section 67. In this flange section, locking springs and housing pins of pin tumblers can be arranged. These springs and pins can interact with core pins arranged in the cylinder core 15 to block the cylinder core 15 against rotation relative to the cylinder housing 55.However, by inserting an assigned key (not shown) into a keyway 51 of the cylinder core 15, such pin tumblers can be sorted in order to turn the cylinder core 15 using the assigned key and thereby unlock the cylinder lock 11 (see also . Fig. 5B und 5D ).

[0079] A locking lug 53 is rotationally fixed to the cylinder core 15. The locking lug projects radially from the cylinder core 15 and can be moved between a locking position L and an unlocking position R by rotating the cylinder core 15. This allows the locking cylinder 13 to be selectively held in a closed position G or released for movement into an open position O, as explained in more detail below (see also...). Fig. 5A bis 5D ). In addition, a socket screw bore 41 is formed on the cylinder housing 55, which serves to lock the locking cylinder 13 in the receptacle 17 against loosening from the receptacle 17, as is also explained below.

[0080] The cylinder lock has a compression spring 25 by means of which the locking cylinder 13 is biased into the open position O opposite the insertion direction E (see also also Fig. 5A bis 5D Furthermore, a locking element 59 is axially located on the locking cylinder 13. This locking element is designed to project axially out of the lock housing 19 when the locking cylinder 13 is in the closed position G, in order to lock the window or door handle 61 against movement relative to its surroundings. In the open position O of the locking cylinder 13, the locking element 59 can, however, be arranged within the lock housing 19 to release the window or door handle 61 for movement relative to its surroundings.

[0081] Furthermore, the cylinder lock 11 has a locking device 21 comprising a locking element 23 designed as a ball 63, which is biased into a locking position A by a compression spring 47 when the cylinder lock 11 is mounted, in order to hold the locking cylinder 13 inserted into the receptacle 17 in the lock housing 19. A blocking element 49 designed as a leaf spring 57 is also provided, which serves to fix the locking cylinder 13 in the closed position G against unauthorized opening attempts. The operation of the locking device 21 and the blocking element 57, which interacts with the locking lug 53, is explained in more detail below.

[0082] First, the Fig. 2A bis 2D the insertion of the locking cylinder 13 along the insertion direction E into the receptacle 17, wherein the locking cylinder 13 can be inserted into the receptacle 17 through an opening. How Fig. 2A As shown, the locking device 23 is arranged in a locking channel 27 oriented obliquely opposite to the insertion direction E and is pre-tensioned by the compression spring 47 along a pre-tension direction V, which corresponds to an extension direction of the locking channel 27. Thus, the locking device 23 is pre-tensioned obliquely and opposite to the insertion direction E by the compression spring 47.

[0083] Before the locking cylinder 13 is inserted into the receptacle 17, the locking device 23 is in a locking position A due to the preload, in which the locking device 23 projects laterally into the receptacle 17 (see figure). Fig. 2A Therefore, during insertion into the lock housing 19, the locking cylinder 13 comes into contact with the locking element 23 and forces the locking element 23 against the preload exerted by the compression spring 47 and along a Fig. 2B The arrow P shown returns to the locking channel 27 (see above). Fig. 2B ), so that the locking cylinder 13 can be inserted further into the receptacle 17 (cf. Fig. 2C ), in order to ultimately be fully inserted into the lock housing 19 (cf. Fig. 2D ).

[0084] How Fig. 2D As shown, when the locking cylinder 13 is fully inserted and in the closed position G, the locking device 23 is pushed back into the locking channel 27 and does not engage in the receptacle 17. Fig. 3A bis 3C Illustrating that the locking cylinder 13 inserted into the lock housing 19 can be moved along the insertion direction E between the closed position G and the open position O, whereby the locking means 23 blocks movement of the locking cylinder 13 against the insertion direction E beyond the open position O and prevents the locking cylinder 13 from being released from the receptacle 17.

[0085] In Fig. 3A The locking cylinder 13 is fully inserted into the receptacle 17 and is in the closed position G, in order, for example, to push the locking element 59 axially out of the lock housing 19 and thereby engage the Fig. 1 to secure the window or door handle 61 shown against a pivoting movement relative to an installation environment. If the locking cylinder 13 is moved from the closed position G against the insertion direction E, the locking cylinder 13 is initially released for such a movement, but the locking device 23 moves laterally towards and into the receptacle 17 due to the preload along an arrow P and in the preload direction V as a result of the movement of the locking cylinder 13 against the insertion direction E (see figure). Fig. 3B ).

[0086] As the lock cylinder 13 moves into the open position O, an engagement opening 39 formed by the faceplate screw bore 41 can eventually reach the level of the locking element 23, allowing the locking element 23 to engage in the engagement opening 39. Once the lock cylinder 13 reaches the open position O, the locking element 23, which is then positioned in the locking position A and engages in the receptacle 17, can also be clamped between a stop 29 formed by a lower boundary of the engagement opening 39 and a boundary 31 of the locking channel 27. This prevents the locking element 23 from moving due to a force acting against the insertion direction E on the lock cylinder 13, and thus blocks the lock cylinder 13 in the open position O, preventing it from being released or removed from the receptacle 17 (see Figure 1). Fig. 3C ).

[0087] In order to nevertheless allow an authorized user to remove the lock cylinder 13 from the lock housing 19 and, for example, replace it with another lock cylinder, it is necessary, as Fig. 4 Figure 1 shows a narrow release slot 35 extending in the insertion direction E on the lock housing 19, through which an elongated release element 37 can be inserted along the insertion direction E and brought into contact with the locking element 23. Similar to the insertion of the lock cylinder 13 into the lock housing 19, the release element 37 can, when inserted along the insertion direction E, push the locking element 23 back out of the locking position A into the locking channel 27, thus releasing the lock cylinder 13 for removal from the lock housing 19.

[0088] Furthermore, the locking channel 27 is open at one end facing away from the locking means 23 and has a disassembly opening 33, so that, for example, it may also be possible to release the compression spring 47 by accessing it through the disassembly opening 33 in order to remove the locking cylinder 13 from the lock housing 19. For example, the disassembly opening 33 can only be made accessible when the window or door handle 61 has been pivoted into a position in which the associated door or window can be opened, so that it is not possible to release the locking mechanism of the locking cylinder 13 when the window or door is closed.

[0089] Furthermore, in order to ensure that the locking cylinder 13 can only be removed by an authorized person, despite the fundamental possibility of removing it from the receptacle 17 by inserting a simple elongated release means 37, and to provide a reliable means of locking the locking cylinder 13 in the closed position G, the cylinder lock 11 illustrated here also includes the aforementioned blocking means 49. Fig. 5A As shown, when the lock cylinder 13 is in the closed position G and the locking lug 53 is in the aforementioned locking position L, in which the locking lug 53 projects laterally beyond the cylinder housing 55, the blocking device 49 is aligned with the locking lug 53 with respect to the insertion direction E. Therefore, movement of the lock cylinder 13 against the insertion direction E from the closed position G is blocked by the blocking device 49.

[0090] However, in order for the lock cylinder 13 to be moved into the open position O, as Fig. 5B The figure shows that the locking lug 53 must first be moved into the unlocking position R, in which the locking lug 53 is aligned with the cylinder housing 55. Due to the rotationally fixed coupling of the locking lug 53 with the cylinder core 15, such a rotation D requires the insertion of an associated key (not shown) into the keyway 51, so that the rotation D of the locking lug 53 can only be carried out by the authorized user. After the rotation D into the unlocking position R, the locking lug 53 is thus, viewed opposite to the insertion direction E, out of alignment with the blocking element 49, so that the locking cylinder 13, as Fig. 5C This illustrates how the locking cylinder 13 can be moved into the open position O, contrary to the insertion direction E and along an arrow P past the blocking element 49. In particular, this movement of the locking cylinder 13 can occur automatically due to its preload provided by the compression spring 25, without the need for a user to pull on the locking cylinder 13.

[0091] Therefore, removing the locking cylinder 13 from its receptacle requires positioning the locking cylinder 13 in the open position O, since otherwise – even if the locking element 23 is pushed back – the locking cylinder 13 will strike the blocking element 49 when moved against the insertion direction E and will be locked against such movement. Therefore, the locking cylinder 13 can only be removed and replaced by the authorized user who possesses the assigned key and can thus move the locking cam 53 into the unlocked position E. The authorized user has a simple means of removing the locking cylinder 13, in particular by inserting the release element 37 into the release slot 35.

[0092] Furthermore, it shows Fig. 5D , that by a rotation D of the cylinder core 15 and thus of the locking lug 53 in the open position O, which again moves the locking lug 53 into the locked position R, the blocking element 49, designed as a leaf spring 57, can be elastically deformed by the locking lug 53, for example to allow the key to be removed from the keyway 51. In addition, the elastic deformation makes it possible to move the locking cylinder 13, designed as a pressure cylinder 45, from the open position O only along the insertion direction E into the closed position G, whereupon the blocking element 49 can snap back against the previously occurring elastic deformation and be arranged again in alignment with the locking lug 53 to block the locking cylinder 13 in the closed position G. Bezugszeichenliste

[0093] 11 Cylinder lock 13 Lock cylinder 15 Cylinder core 17 Receptacle 19 Lock housing 21 Locking device 23 Locking means 25 Compression spring 27 Locking channel 29 Stop 31 Locking channel limit 33 Disassembly opening 35 Release slot 37 Release means 39 Engagement opening 41 Faceplate screw hole 45 Compression cylinder 47 Compression spring 49 Blocking element 51 Keyway 53 Locking lug 55 Cylinder housing 57 Leaf spring 59 Locking element 61 Window or door handle 63 Ball 67 Core receptacle section 69 Flange section A Locking position D Rotation E Insertion direction G Closed position L Locking position O Open position PP Arrow R Unlocking position V Preload direction

Claims

1. Cylinder lock (11), comprising a locking cylinder (13) with a cylinder housing (55) and a lock housing (19) with a receptacle (17) into which the locking cylinder (13) can be inserted along an insertion direction (E), wherein the cylinder lock (11) has a locking device (21) for locking the locking cylinder (13) in the lock housing (19), which locking device comprises a locking means (23) pretensioned into a locking position (A), wherein the locking means (23) projects into the receptacle (17) in the locking position (A), and wherein the locking means (23) can be pushed back from the locking position (A) by the locking cylinder (13) against the pretension during insertion of the locking cylinder (13) into the receptacle (17) and is designed to, after complete insertion of the locking cylinder (13), due to the pretension into the locking position (A) to get back and secure the locking cylinder (13) against loosening from the holder (17).

2. Cylinder lock (11) according to claim 1, wherein the locking means (23) is biased obliquely counter to the insertion direction (E) into the locking position (A).

3. Cylinder lock (11) according to claim 1 or 2, wherein the locking means (23) is guided in a locking channel (27), in particular in a bore oriented obliquely opposite to the insertion direction (E); in particular wherein the locking means (23) can be pushed into the locking channel (27) starting from the locking position (A) by a force exerted in the direction of insertion (E); and / or in particular wherein the locking channel (27) has a disassembly opening (33) on a side facing away from the receptacle (17), through which the locking means (23) is accessible for disassembly, wherein the locking means (23) can be moved out of the locking position (A) into the locking channel (27) by disassembly and the locking cylinder (13) can be released for removal from the receptacle (17).

4. Cylinder lock (11) according to one of the preceding claims, wherein the locking cylinder (13) has a stop (29) with which the locking cylinder (13) inserted into the receptacle (17) strikes the locking means (23) when a force is exerted on the locking cylinder (13) in the opposite direction to the insertion direction (E), wherein the locking means (23) positioned in the locking position (A) can be clamped in particular between the stop (29) and a boundary of the locking channel (27) as a result of the force being applied.

5. Cylinder lock (11) according to one of the preceding claims, wherein the locking cylinder (13) has an engagement opening (39) for the locking means (23), into which the locking means (23) engages to lock the locking cylinder (13), wherein the engagement opening (39) is formed in particular by a forend screw bore (41) on the cylinder housing (55).

6. Cylinder lock (11) according to one of the preceding claims, wherein the locking cylinder (13) inserted into the lock housing (19) is movable relative to the locking means (23) along the insertion direction (E) between an open position (O) and a closed position (G), wherein the locking cylinder (13) is connected in particular axially to a locking element (59) which is designed to block a movement of the lock housing (19) relative to an installation environment, in particular in a plane oriented perpendicular to the insertion direction (E), in the closed position (G) of the locking cylinder (13) and to release it in the open position (O) of the locking cylinder (13).

7. Cylinder lock (11) according to claim 6, wherein the locking cylinder (13) is designed as a pressure cylinder (45) and is prestressed into the open position (O) counter to the insertion direction (E), wherein the locking means (23) is designed to block movement of the locking cylinder (13) inserted into the receptacle (17) counter to the insertion direction (E) beyond the open position (O); and / or wherein the locking means (23) can be pushed back against the prestress by moving the locking cylinder (13) from the open position (O) into the closed position (G).

8. Cylinder lock (11) according to claim 6 or 7, wherein the cylinder lock (11) has a blocking element (49) which is designed to block the locking cylinder (13) inserted into the receptacle (17) in the closed position (G) against movement into the open position (O).

9. Cylinder lock (11) according to claim 8, wherein the locking cylinder (13) has a locking lug (53) which is movable, in particular rotatable, between a locking position (L) and an unlocking position (R) by actuating the locking cylinder (13), wherein the locking lug (53) projects laterally beyond the cylinder housing (55) in the locking position (L), and wherein the blocking element (49) is arranged in alignment with the locking lug (53) counter to the insertion direction (E) when the locking cylinder (13) is in the closed position (G) and the locking lug (53) is in the locking position (L), wherein the blocking element (49) is designed in particular as a leaf spring (57) which can be pushed back into the locking position (L) in the open position (O) of the locking cylinder (13) by moving the locking lug (53).

10. Cylinder lock (11) according to claim 9, wherein the locking lug (53) can be brought out of alignment with the blocking element (49) by moving, in particular rotating, into the unlocking position (R), wherein the locking cylinder (13) can be moved from the closed position (G) into the open position (O) with the locking lug (53) positioned in the unlocking position (R).

11. Cylinder lock (11) according to claim 9 or 10, wherein the blocking element (49) can be pushed back and / or elastically deformed against a prestress when the locking cylinder (13) is positioned in the open position (O) by moving, in particular rotating, the locking lug (53) into the locking position (L), wherein the blocking element (49) is designed in particular to come into alignment with the locking lug (53) as a result of a movement of the locking cylinder (13) from the open position (O) into the closed position (G) when the locking lug (53) is positioned in the locking position (L) due to the prestress and / or the preceding elastic deformation.

12. Cylinder lock (11) according to one of the preceding claims, wherein the locking cylinder (13) is designed as a mechanical locking cylinder and has a cylinder core (15) rotatably held in the cylinder housing (55) and operable by means of an associated key; or wherein the locking cylinder (13) is designed as an electronic locking cylinder and has an electric drive for driving a locking element.

13. Cylinder lock (11) according to one of the preceding claims, wherein the lock housing (19) is formed by a pivotable window or door handle (61); and / or wherein the locking means (23) is designed as a ball (63) which is prestressed by a compression spring (47) in the direction of the locking position (A); and / or wherein a release slot (35) extending along the insertion direction (E) is arranged on the receptacle (17), wherein the locking means (23) can be urged out of the locking position (A) against the prestress by inserting an elongate release means (37) into the release slot (35).

14. Lockable window or door handle (61) comprising a cylinder lock (11) according to one of the preceding claims.

15. Lockable window or door handle (61) according to claim 14, wherein the window or door handle (61) forms the lock housing (19), wherein the locking cylinder (13) is designed as a pressure cylinder (45) prestressed in an open position (O), and wherein the locking cylinder (13) inserted into the receptacle (17) is movable between a closed position (G) and the open position (O) along the insertion direction (E), wherein the locking cylinder (13) is axially connected to a locking element (59) which is designed to block a pivoting movement of the window or door handle (61) relative to an installation environment, in particular a window frame or a door leaf, in the closed position (G) of the locking cylinder (13) and to release it in the open position (O) of the locking cylinder (13).

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