EP3517713B1 - Closing device - Google Patents

Description

The invention relates to a core extension, in particular a core extension for a lock core of a lock cylinder, which extends essentially in an axial direction in order to axially elongate a lock core, according to claim 1.

The invention also relates to an elongated lock core, in particular an elongated lock core for a lock cylinder of a cylinder lock, comprising at least one lock core unit and at least one core extension, according to claim 2.

The invention also relates to an anti-snap lock cylinder, in particular an anti-snap lock cylinder for a cylinder lock, with at least one lock core and a cylinder housing in which the lock core is received, the cylinder housing having at least one predetermined breaking point that is displaced forward.

In addition, the invention relates to a locking device comprising at least one key and at least one lock core corresponding thereto and / or a lock cylinder corresponding thereto according to claim 11.

The invention also relates to a method for anti-snap securing of a lock cylinder according to claim 12.

Last but not least, the invention relates to a method for producing an anti-snap lock cylinder according to claim: 13.

Lock cores, lock core extensions, lock cylinders, cylinder locks, keys or the like and methods for their production are generally known from the prior art. Such components are also known in the field of anti-snap. Known anti-snap lock cylinders provide material reinforcement or the pre-storage of the predetermined breaking point in front of the forend screw hole.

From the EP 2 730 727 A2 a lock cylinder with a cylinder core rotatable in a lock cylinder module and a locking tumbler for blocking when opening or breaking the lock cylinder module is known, the securing tumbler being arranged in a scanning unit adjacent to the lock cylinder module and a follower pin for scanning the position of the lock cylinder module and a locking bolt for blocking includes. The lock cylinder according to the prior art has a core extension. The core extension is designed to couple two cylinder cores. A housing extension is also provided so that, in particular, a modular structure of a lock cylinder results.

From the DE 10 2011 100 444 A1 a double lock cylinder is known which has a one-piece, shell-shaped core extension for each cylinder core. The core extensions are axially displaceable.

From the GB2545389 a lock cylinder with a security mechanism is known. This has a one-piece core extension which, through a slot formed there, has a material weakening which serves as a predetermined breaking point. In the operating position, the slot is aligned with a channel which is provided for a locking pin. The locking pin is held in a prestress by a cross pin.

From the EP2840204 is a lock cylinder with a housing, a rotatable in the housing driver with locking nose and with an outside and an inside on both sides of the driver is known, at least on the outside of a cylinder core with tumblers and on the inside of a spring biased sleeper is provided, which is locked by an axially displaceable part under spring force and at least partially retained in the housing and which blocks the lock cylinder when the outside breaks away due to the failure of the lock, a predetermined breaking point being provided in the housing on the outside between the axially immovable driver and the nearest tumbler and that the axially displaceable part is displaceably and constantly rotatably mounted in the driver and is spring-loaded in the axial direction directly or indirectly against the end face of the cylinder core on the outside.

From the GB 2 531 900 A Another double lock cylinder with a predetermined breaking point is known.

Further anti-snap locks are for example from the DE 200 21 352 U1 , WO 2014 176 647 A1 , WO 2011 051 703 A2 known.

It is an object of the present invention to create a core extension, an elongated lock core, an anti-snap lock cylinder, a locking device and a method for this, in which an improved anti-snap function is implemented and the method of functioning and manufacturing is improved.

These and other objects are achieved by a core extension according to claim 1, an extended lock core according to claim 2, an anti-snap lock cylinder according to claim 4, a locking device according to claim 11 and the method according to claims 12 and 13.

Advantageous developments of the invention are specified in the dependent claims or are specified below in connection with the description of the figures.

The invention includes the technical teaching that in the case of a core extension, in particular a core extension for a lock core of a lock cylinder, which extends essentially in an axial direction in order to extend a lock core axially, it is provided that the core extension is designed in several parts and at least comprises an extension part and at least one pressure piece adjoining it in the axial direction. The core extension is preferably made in several parts, in particular in two parts. In another embodiment, the core extension is constructed in several parts, in particular in four parts, six parts or with several parts. The core extension is preferably designed in two parts. The pressure piece adjoins the extension part in the axial direction. The pressure piece is preferably located in a pressure piece receptacle in the extension part. In the axial direction of the lock cylinder, a bore or recess is provided in the extension part for this purpose, which acts as a pressure piece receptacle. The pressure piece is located in the pressure piece holder. Both the pressure piece receptacle and the pressure piece are thus preferably arranged essentially axially. The pressure piece thus adjoins at least one end face of the extension part in the axial direction. In this case, the pressure piece can at least partially protrude axially beyond the extension part or can be arranged entirely in the pressure piece receptacle, thus being sunk. The pressure piece preferably protrudes in the axial direction over the extension part, in particular in the direction of the outside. The pressure piece is secured in the pressure piece receptacle against being pulled out towards the outside. For this purpose, the pressure piece and pressure piece receptacle have corresponding shoulders. A shoulder of the pressure piece adjoins a shoulder of the pressure piece receptacle in an operating position.

The core extension has the extension part and the pressure piece axially adjoining it and / or received in the extension part. Under axial subsequently, any arrangement including lying is understood, in which the pressure piece is in contact with the extension part and a rear end of the pressure piece is arranged at a distance in the axial direction from a front end of the extension part. The pressure piece is preferably located in the extension part, and is thus preferably at least partially received in the extension part. The extension part is designed to be connected to or to interact with the lock core. The pressure piece is designed to interact with a coupling mechanism axially adjoining it. Both the interaction with the lock core and the interaction with the coupling mechanism take place in a rotationally fixed manner, so that a torque can be transmitted.

The extension part is preferably designed to extend flush on the outside with the lock core. This means that the extension part and the lock core are (approximately) concentrically arranged, i.e. when the extension part and the lock core are designed as rotating parts, they are arranged one behind the other on a common axis, the respective axis of the corresponding part thus being arranged concentrically and / or in alignment with one another are. The pressure piece receptacle is eccentric. That is, the axis of the pressure piece receptacle is offset, more precisely arranged or designed offset parallel to the common axis of the lock core and the extension part. The extension part further preferably has an engagement section which interacts with a corresponding receiving section of the lock core. Alternatively, the lock core can have an engagement section and the extension part can have a receiving section. The engagement section and the receiving section are designed to interact, in particular to transmit a torque, and are also referred to as engagement means due to the mutual engagement. The engagement section and the receiving section are preferably designed to be complementary.

The cylinder core and extension part are roughly dimensioned radially so that a flush transition is guaranteed. At the end opposite the cylinder core, the core extension has a pressure piece designed as a pressure pin. The pressure pin or the pressure piece is designed to interact with the extension part. For this purpose, the extension part has a corresponding pressure piece or pressure pin receptacle. The pressure pin receptacle is preferably designed as a bore. In one embodiment, the bore can be designed as a stepped bore. The pressure pin is designed to be at least partially complementary to the bore. In particular, the pressure pin has a shaft section. The shaft section is designed as a cylindrical shaft section. Shank section and bore are designed to be complementary, so that the pressure pin with the shank section can be received or received in the bore. For axial protection against being pulled out towards the outside, there are holes and Shank section stepped complementarily. Due to the eccentric arrangement of the pressure piece or pressure pin receptacle, the pressure piece or pressure pin is also received eccentrically.

So that the pressure piece or the pressure pin is limited in the axial direction to the extension part, a stop is provided which can be provided in the receptacle and / or on the pressure pin. The pressure pin preferably has a shoulder which functions as a stop limit. The shoulder is formed by a central part. The middle part connects axially to the shaft shoulder. The central part is preferably also cylindrical, but has a larger diameter than the shaft section. The document has an end part on the side opposite the shaft section. The end part is preferably designed as a rounded end cap. The end cap is dimensioned radially smaller than the central part. In particular, the radial maximum dimension of the end cap corresponds approximately to that of the shaft section. Towards its end, the end cap tapers, preferably curved, so that a hemispherical shape is realized. The end cap, middle part and shaft section are arranged concentrically to one another. Overall, the pressure pin is designed to be rotationally symmetrical about its axis, preferably as a rotating part.

Accordingly, in one embodiment it is provided that the extension part has a pressure piece receptacle for receiving the pressure piece, in which the pressure piece is at least partially received in order to realize an interaction between the pressure piece and the extension part. The pressure piece receptacle is preferably arranged eccentrically. In this context, eccentric means that an axis of the pressure piece receptacle is offset, in particular offset parallel to an axis of rotation of the lock core.

Another embodiment provides that the pressure piece has at least one cross-sectional change in the axial direction, which, among other things, causes a limit stop of the pressure piece in the direction of the pressure piece receptacle. In particular, a radial change in cross section is provided as seen in the axial direction. The change in cross section can be continuous or abrupt. At least one shoulder, preferably precisely one shoulder, is preferably provided. The respective shoulder is preferably designed as a circumferential shoulder.

The invention provides that the extension part has connecting means for connection to corresponding connecting means of the lock core. The connecting means form a predetermined breaking point of the core extension. In addition to the molding and the corresponding receptacle - the engagement means - the extension part has further connection means for connection to the lock core. The The connecting means of the lock core and extension part are designed for an axial coupling and here: according to the invention for a pin connection. In this way, an at least positive connection is realized. The connection comprises a pin and a pin receptacle. The pin receptacle extends transversely, in particular perpendicular to the axis of the lock core and extension part and at least partially penetrates both lock core and extension part. The pin receptacle is preferably designed as a through opening, in particular as a through hole through the lock core and extension part. In the assembled state, the pin receiving sections of the lock core and the extension part are aligned. A pin is inserted through the pin receiving sections for connection. In this way, in addition to a connection provided in the circumferential direction for transmitting a torque, an axial securing device is also provided. The pin and through opening are dimensioned so that they can form a second predetermined breaking point. The predetermined breaking point includes any type of deformation or deformation point that represents a desired and / or intended impairment of function. In particular, a predetermined breaking point is dimensioned in such a way that, during a snapping attempt, it breaks in front of the component with the weakest section - usually the area of the forend hole - and thus prevents the component from breaking in the area of the weakest section (forend hole). This includes both partial deformation as well as breaking or tearing. The cross section of the pin and the through-opening is designed accordingly. The pin is designed to be complementary to the through opening and its outer dimension corresponds approximately to the inner dimension of the through opening. The dimension of the cross-sectional area of the pin is preferably smaller than the cross-section of a cylinder housing in the area of the forend screw hole. The cross section of the through opening is preferably larger than the cross section of the predetermined breaking point in the cylinder housing.

If an attempt was made to break it open using the snapping method, the axial connection between the extension part and the locking core would be separated. This makes the extension part more difficult to remove in the axial direction.

The invention also provides that the extension part has at least one locking recess extending transversely to the axial direction for cooperation with a locking mechanism. A locking mechanism is provided so that the extension part cannot simply be pulled out in the axial direction during a snapping attempt. To interact with the locking mechanism, the extension part has at least one corresponding locking mechanism receptacle or, for a shorter time, locking receptacle. The locking mechanism recording is as a recess designed, in particular as a blind hole. The blind hole preferably extends in the radial direction. At least two blind holes are preferably provided. At least two of the Blind holes are arranged at the same distance in the axial direction from one end of the extension part, but are offset radially. Two adjacent blind holes are preferably arranged offset by approximately 90 °. In this way, the core extension can be used for conventional key-lock combinations and for reversible key-lock combinations. The respective blind holes are preferably aligned radially.

The invention also includes the technical teaching that in the case of an extended lock core, in particular an extended lock core for a lock cylinder of a cylinder lock, comprising at least one lock core unit and at least one core extension, it is provided that the lock core unit is connected to the core extension via corresponding connecting means of the lock core unit and the The core extension is connected, in particular secured in the axial direction, in particular the core extension being designed as a core extension described here, the lock core unit having connecting means for connecting the lock core unit to the core extension, which represent a material weakening and thus a predetermined breaking point, the core extension being formed in several parts is. The axial lock prevents it from moving out in the axial direction. The connecting means are designed as axial connecting means which prevent the connecting part and lock core unit from moving axially apart. According to the invention, the axial connection, as described above, is designed as a pin connection. The lock core unit corresponds to a non-extended lock core, i.e. a lock core without a core extension. However, the lock core unit has connecting means for connecting the lock core unit to the core extension. These represent a material weakening and thus a predetermined breaking point. The core extension can be made in one piece or in several pieces. Thus, in one embodiment, two or more core extensions can be provided. In the case of a multi-part design of a core extension, at least two core extensions can be designed differently. For example, one core extension can be designed with an anti-snap function, while at least one other core extension can be designed without an anti-snap function or with a different or limited anti-snap function. For example, a lock core can be extended with a conventional core extension, which is then followed by the core extension with the extension part described here and the pressure piece or pressure pin. In one embodiment, at least part of the core extension is secured, in particular pinned, in the axial direction to the adjacent part - the lock core unit and / or an adjacent core extension. In another embodiment, all parts of the core extension with the exception of the respective pressure piece or pressure piece are axially secured to one another, in particular pinned. In any case, the core extension is secured axially to the closing unit, in particular pinned.

According to the invention, the connection of the connecting means on the closing core side and the connecting means on the core extension side is a predetermined breaking point; formed, on which the lock core unit can be separated from the core extension when a corresponding force is applied. The cross-sections are designed accordingly. As stated, the predetermined breaking point generally causes the failure of the cross section, be it through breaking or merely through at least partial deformation.

According to the invention, the corresponding connecting means are designed as a pin and pin receptacle, in particular as a pin and pin bore. The pin material and pin cross-section or the dimension of the pin hole are selected so that the predetermined breaking point breaks in front of the area around the faceplate hole.

The invention also provides that in a locking mechanism for an anti-snap lock cylinder, which locks the core extension in a cylinder housing when a lock core is moved axially, in particular when an attempt is made to pull the lock core out, the locking mechanism at least one in a locking pin receptacle in one The cylinder housing has against, in particular directly against, a lock core or an elongated lock core biased locking pin, which interacts with the core extension or the elongated lock core during axial movement during an attempt to pull the lock core out of the elongated lock core, in particular engages in its recess by the locking receptacle opposite the locking pin receptacle or the locking pin is upstream and / or a connection of locking core-side connecting means and core extension-side connecting means is designed as a predetermined breaking point, at which a lock when a corresponding force unit is separable from a core extension. In contrast to the solutions known from the prior art, the solution according to the invention does not require a further feeler pin or the like, which locks the locking pin directly and releases it to engage in the locking recess when triggered. Rather, the solution according to the invention provides that the locking function is integrated into the existing components in the operationally ready state. For this purpose, in an operating position of the locking mechanism, the locking pin is directly against the extended lock core or the core extension biased. A spring presses the locking pin against the core extension. So that the locking pin does not engage in the locking receptacle of the core extension, the locking receptacle is located in front of the locking pin receptacle or the locking pin. This means that the The axis of the locking receptacle and the axis of the locking pin or the locking pin receptacle are arranged offset parallel to one another. In the operating position, the pretensioned locking pin is pretensioned against an area around the opening of the locking receptacle such that the locking pin is not forced into the locking receptacle. Only with an axial movement of the core extension and thus the locking receptacle are the axes of the locking receptacle and the locking pin / locking pin receptacle arranged coaxially to one another and the locking pin is pushed into the locking receptacle by the spring and thus engages there.

The locking mechanism has a locking pin receptacle. This is preferably formed in a cylinder housing, for example as a blind hole. A spring-loaded locking pin is received in the locking pin receptacle. The locking pin receptacle and locking pin are arranged in such a way that an adjacently arranged lock core or an extended lock core presses the locking pin back into the locking pin receptacle in an operating position in which the axes of the locking receptacle and the locking pin or locking pin receptacle are offset from one another, and in an axially offset position Position in which the aforementioned axes are arranged coaxially or aligned with one another, allows the locking pin to move out of its pressed-in position at least partially in the direction of the core extension. Accordingly, a recess is provided on the core extension into which the locking pin can partially advance.

Alternatively or additionally, the locking mechanism has a connection between the lock core and the core extension. The extension connects the lock core or lock core unit and the extension part of the core extension against axial separation. The connection is dimensioned with such cross-sections that they form a further predetermined breaking point on a different component of an anti-snap cylinder than on the cylinder housing.

The invention further includes the technical teaching that in an anti-snap lock cylinder, in particular an anti-snap lock cylinder for a cylinder lock, with at least one lock core and a cylinder housing in which the lock core is received, the cylinder housing, which in particular is in one piece is designed, has at least one pre-shifted predetermined breaking point, it is provided that a locking mechanism, in particular a locking mechanism described here, is provided, in particular which, when the lock core is moved axially, in particular when the lock core is attempted to be pulled out, the core extension is prevented from axially moving out in the cylinder housing blocks and / or which, in addition to the predetermined breaking point on the cylinder housing, provides a further predetermined breaking point, which is preferably provided on a component other than the cylinder housing itself, in order to implement a two-stage anti-snap function. For the purposes of the present invention, the term “forward shifts” understood a position between an outside and forend screw hole. The predetermined breaking point is thus upstream of the forend screw bore, that is to say the weakest cross section apart from the predetermined breaking points, in the outer direction. In the event of a snapping attempt, the predetermined breaking point that was displaced forward would break in front of the cross section in the area of the forend screw hole. The cylinder housing (also) has a predetermined breaking point. According to the invention, at least one further predetermined breaking point is provided in addition to the predetermined breaking point on the cylinder housing. This further predetermined breaking point is provided on a component other than the cylinder housing and is therefore located outside the actual cylinder housing, although the component with the second predetermined breaking point itself can be arranged in the cylinder housing, ie is surrounded by it. Outside of this is to be understood as meaning that the further predetermined breaking point is located on a different component than on the cylinder housing. The predetermined breaking point, which is not formed on the cylinder housing, for example by an incision, is preferably implemented by the connecting means of the core extension.

One embodiment therefore provides that the connection of the connecting means on the lock core side and the connecting means on the core extension side is designed as a predetermined breaking point not assigned to the housing, at which the lock core unit can be separated from the core extension when a corresponding force is applied.

According to the invention, the corresponding connecting means are designed as a pin and pin receptacle, in particular as a pin and pin bore.

The invention also includes the technical teaching that in the case of an anti-snap lock cylinder, in particular an anti-snap lock cylinder for a cylinder lock, with at least one lock core and a cylinder housing in which the lock core is received, the cylinder housing, which in particular is in one piece is designed, has at least one predetermined breaking point, it is provided that in addition to the predetermined breaking point on the cylinder housing, another predetermined breaking point is provided, which is preferably provided on a different component than on the cylinder housing itself in order to implement a two-stage anti-snap function. A first predetermined breaking point is formed on the cylinder housing in a forward position. The predetermined breaking point is designed as a cross-sectional taper. The cross section in the radial direction perpendicular to the axis is to be considered through the corresponding axial position. The cross section through the forend screw hole is the weakest point in a conventional lock cylinder. Without an additional predetermined breaking point, the lock cylinder would break there in an attempt to snap. The fact that an advanced predetermined breaking point is provided for an anti-snap cylinder means that the lock cylinder is at break with a snapping attempt at the predetermined breaking point. Another predetermined breaking point is provided in order to further increase the security against snapping attempts. Further predetermined breaking points can be provided here on the cylinder housing, in particular predetermined breaking points which are displaced forward. Preferably, however, at least one further predetermined breaking point is provided on a component other than on the cylinder housing, thus outside the cylinder housing, in particular on the lock core, more precisely between the lock core and the core extension. According to the invention, the second predetermined breaking point is designed as an axial securing of the extension part and the lock cylinder, for example a radial pin connection or a pin connection oriented transversely to an axis of rotation, the cross-section or the cross-sections of the securing being selected accordingly. The cross section perpendicular or radial through the connection is weaker than the cross section perpendicular or radial through the forend screw hole.

One embodiment provides that the lock core is designed as an elongated lock core described here, the further predetermined breaking point in addition to the one on the cylinder housing, i.e. the further predetermined breaking point on a component of the anti-snap lock cylinder other than on the cylinder housing, through the connection of or The connecting means of the core extension and the lock core unit is formed. The second predetermined breaking point is preferably designed in such a way that it only breaks after the first predetermined breaking point, preferably the predetermined breaking point formed on the one-piece housing, has broken. In one embodiment, the second predetermined breaking point does not break immediately, but rather the connecting means are at least partially deformed. In this way, the deformation also contributes to locking.

In another embodiment it is provided that the core extension is designed as a core extension described here.

A further embodiment provides that a locking mechanism is provided which, when the lock core is moved axially, in particular when an attempt is made to pull out the lock core, locks the lock core in the cylinder housing, in particular locks it against axial movement. The locking mechanism can comprise the second predetermined breaking point. The locking occurs more precisely when the core extension is moved axially. This means that no further tracer pins, which require corresponding holes, are required. Because the core extension interacts directly with the locking pin or pushes it back into the locking pin receptacle against the spring force. There is therefore no indirect triggering as with a tracer pen. Accordingly, only one receptacle for the locking pin (and the spring) has to be provided in the housing for receiving the locking mechanism. At right angles to this, no further recordings are provided for any scanning pens or the like. Through this training, a housing extension can also be used, which is necessary for the realization of a cylinder with a follower pen, can be omitted. The lock cylinder thus comprises only a single housing and is designed without a scanning pin. The locking pin can also be designed simply as a cylindrical pin without a constriction or the like. As a result, the manufacturing effort is significantly increased with an improved mode of operation. The locking takes place by radial penetration of the locking pin into the locking receptacle.

Yet another embodiment provides that the locking mechanism has at least one locking pin preloaded in a locking pin receptacle in the cylinder housing against the cylinder core or the elongated lock core, which upon axial movement during an attempt to pull out the elongated lock core with the cylinder core or the elongated lock core Lock core cooperates, in particular engages in its recess. The locking mechanism is triggered by displacement, in particular axial movement, of the core extension. A stylus or other indirect triggering is not required. The core extension, or more precisely the extension part, thus forms the trigger mechanism. In the operating mode, the locking pin is spring-biased against the core extension, preferably in an area outside the locking mechanism receptacle on the extension part. The locking mechanism receptacle (locking receptacle) is arranged adjacent to the spring-loaded locking pin and thus also adjacent to the locking pin receptacle. The locking mechanism receptacle is arranged on the extension part in such a way that in the event of an axial offset or an axial movement towards the outside, the locking pin can at least partially reach the locking mechanism receptacle. Locking pin - thus also locking pin receptacle and locking mechanism receptacle are preferably axially offset, thus roughly (axially) parallel to one another.

Yet another embodiment provides that the locking pin receptacle is located in front of the locking recess or locking mechanism receptacle in an operating position. Upstream in the sense of the invention means here that the locking pin receptacle is closer to the outside than the recess for receiving the locking pin in the extension part, that is to say the locking mechanism receptacle. When the core extension is moved towards the outside, the extension part releases the locking pin so that it can protrude into the locking mechanism receptacle. A further axial and / or rotating movement of the core extension is thus blocked by the engaging locking mechanism.

One embodiment also provides that the cylinder housing has a locking lever groove for a locking lever rotatable about an axis of rotation, the locking lever groove and / or the locking lever having a shoulder so that the groove and / or the lever in has different dimensions in the axial direction. The locking lever is received radially rotatably in the cylinder housing. The cylinder housing accordingly has a corresponding locking lever groove. This penetrates the housing radially and extends in the axial direction. In order to realize a small-sized lock cylinder, the lock lever groove is designed with a cross-sectional change in the radial direction, in particular with at least one shoulder. Corresponding or complementary thereto, the locking lever has a corresponding change in cross section or corresponding shoulders in the radial direction. In particular, an L-shaped cross-section, viewed from the side, is provided for the groove or the locking lever.

Therefore, one embodiment provides that a first shoulder section with a smaller axial dimension is arranged closer, in particular radially closer, to the (rotational) axis of the lock core than a shoulder section with a larger axial dimension and the locking mechanism in the lock cylinder in the radial direction is arranged above the shoulder section with the larger axial dimension and / or next to the shoulder section with the smaller axial dimension. The smaller axial dimension allows more housing material at this point. The locking mechanism is formed in the housing material next to the smaller axial shoulder. In particular, the locking pin receptacle is formed here. This is preferably located next to the opening section with the smaller axial dimension, above the opening section with the larger axial dimension and below the extension part.

In a preferred embodiment it is provided that the anti-snap lock cylinder is designed as a double lock cylinder with an outer lock cylinder section and an inner lock cylinder section. When attempting to snap, the outer lock cylinder section is attacked and partially destroyed. Due to the solution according to the invention, the inner lock cylinder section remains functional.

In addition, the invention includes the technical teaching that in a locking device comprising at least one key and at least one corresponding lock core and / or a corresponding lock cylinder, it is provided that the lock core as an elongated lock core described here and / or the lock cylinder according to a The anti-snap lock cylinder described here is / are formed and the key corresponds to and / or is assigned to the lock cylinder and / or the lock core.

The invention also includes the technical teaching that in a method for anti-snap securing of a described anti-snap lock cylinder, it is provided that during a snapping attempt in which on the outer Lock cylinder section a force is applied, first the first predetermined breaking point of the cylinder housing breaks and when the lateral force is further applied to the outer lock cylinder section, the second predetermined breaking point breaks and / or is deformed on another component of the anti-snap cylinder than the cylinder housing.

One embodiment provides that the locking mechanism engages in the recess between breaking the first predetermined breaking point and breaking the second predetermined breaking point.

Last but not least, the invention includes the technical teaching that in a method for producing an anti-snap lock cylinder described here, the steps are provided: Providing a first predetermined breaking point in the cylinder housing, in particular the one-piece cylinder housing, and providing a second predetermined breaking point on one different component of the anti-snap cylinder than on the cylinder housing, in particular in the extended lock core, more precisely between the lock core and the core extension. A lock core or a lock core unit is provided to produce the anti-snap cylinder. This is connected to a core extension. The core extension and lock core unit are preferably connected via a pin connection. The locking mechanism is also provided. This is arranged or formed in or on the cylinder housing. For this purpose, the extended lock core is inserted into the cylinder housing in such a way that the extended lock core, more precisely the lock core extension, biases the locking pin into the locking pin receptacle.

The present invention with the anti-snap function thus offers protection against violent attacks in which the outer lock cylinder part is to be broken off. The upstream first predetermined breaking point on the cylinder housing and the additional locking mechanism ensure that even after breaking off the cylinder housing on the outside, an attacker cannot gain access to the locking lever. If the rotating mechanism is blocked from the outside at the same time, the door can still be closed from the inside. This is particularly relevant for any dangerous situations that may arise, such as in the event of a fire, etc. In one embodiment, a cylinder front is equipped with a drill and extraction protection. In addition, the area between the predetermined breaking point on the cylinder housing and the locking lever is protected against drilling in one embodiment by hard metal elements.

Snapping is a violent break-in method in which an attempt is made to remove the lock cylinder by breaking it off when the door is closed in order to gain access to the lock. In the initial situation, the door, which is equipped with a cylinder lock with a lock cylinder, is locked. The snapping attack takes place from the Outside instead. The lock cylinder and lock are firmly attached to the door. The (axial) length of the lock cylinder is adapted to the door leaf and any fitting that may be present and does not protrude more than 3 mm. The break-in (attempt) takes place with a pair of pliers, usually a welding pliers with locking device, as well as a slotted screwdriver. Using pliers and a screwdriver, the fitting surrounding the lock cylinder on the outside of the door, if any, is removed or bent so that the lock cylinder is freely accessible from the outside. Then the pliers are placed horizontally or vertically on the lock cylinder and, if necessary, locked. An attempt is made to place the pliers as close as possible to the door leaf or to the ceiling of the lock. Then the handle of the pliers is jerked to the right and left or up and down. This ensures that the lock cylinder housing breaks at the weakest cross-section - without a predetermined breaking point in the area of the forend screw hole - otherwise at the predetermined breaking point - since the smallest material cross-section is present there. If the bar or the cylinder housing is broken after the jerky movement, the outer lock cylinder part can be removed with the pliers in conventional locks. The locking lever and the inner locking cylinder part are then exposed and are accessible from the outside. The locking lever can then be turned directly using a screwdriver and the lock bolt retracted. If this should not be possible immediately, the inner part of the lock cylinder is first pressed towards the inside of the door with the screwdriver and the now mostly loose locking lever is removed from the lock. Then the locking mechanism of the lock is operated directly or with the aid of the locking lever with a screwdriver. The aforementioned break-in method of snapping is considered successful if the bolt of the lock can be closed at least one turn after removing the lock cylinder, completely or only in part. Lock cylinders that offer increased resistance to this type of attack are commonly referred to as anti-snap cylinders.

In order to counteract the attempted break-in using the snapping method, it is necessary to take several countermeasures on / in the lock cylinder. First of all, it must be prevented that the lock cylinder can break at the weakest point (without a predetermined breaking point) - the cross-section at the forend screw hole, i.e. the point with the smallest material cross-section. In the case of a double cylinder without predetermined breaking points, this point is in the area of the forend screw hole. In one embodiment, the area of the forend screw hole is reinforced by very hard or very elastic materials or material combinations. This prevents, for example, breaking or complete tearing off after the material has broken brittle. Another embodiment provides that a modular lock cylinder is provided. The lock cylinder is constructed in segments. With a jerky movement using pliers, only individual segments of the Break off the lock cylinder housing and can be removed, but not the entire outer lock cylinder part on the outside of the door. The material weakness is thus shifted from the web with forend screw hole to the fastening and connecting element of the module segments. In another embodiment, the weak point in the material is moved forward to a first predetermined breaking point. A predetermined breaking point or several predetermined breaking points are provided between the forend screw hole and the outer front surface of the lock cylinder. The material remaining there has a smaller material cross-section than the web in the area of the forend screw hole. During a snapping attempt, the lock cylinder then breaks at the first predetermined breaking point instead of in the area of the forend screw hole as was previously the case with conventional designs. Thus, part of the lock cylinder housing remains between the faceplate screw hole and the outside of the door, so that the remaining lock cylinder parts cannot be removed any further or pushed away. After it has been ensured that the lock cylinder cannot break off at all or if it can break off in a controlled manner, further measures can be taken to prevent subsequent turning of the lock lever from the outside of the door. The locking lever can be temporarily or permanently fixed by means of a shaft on the inside or outside of the lock cylinder, via spring-loaded or unsprung protruding pins. If the locking lever is only temporarily set, this means that even if the lock cylinder part has broken off from the outside, it can still be closed from the inside of the door.

In the present invention, the lock cylinder is arranged with a predetermined breaking point between the forend screw bore and the last, in particular rearmost, housing pin on the outside of the cylinder. This predetermined breaking point is placed and designed in such a way that the remaining material has a lower section modulus than the material in the area of the forend screw hole.

The lock core and a shaft, also a core extension, with an integrated pressure piece, are arranged in the upper, large diameter of the lock cylinder housing. The core end of the lock core and the core extension are connected by means of a pin. This pin with a small diameter has no further function during the closing process and is part of the protective mechanism in the event of an attack by snapping.

The introduced pressure piece and the corresponding bore in the core extension are designed so that a step or a taper limits the axial movement of the pressure piece in the direction of the front surface of the outside of the lock cylinder. This prevents the pressure piece from being able to be removed after the outer lock cylinder part has broken off, as a result of which the coupling mechanism of the lock lever located behind would be freely accessible.

Two blind holes are made in the core extension at an angle of 90 ° to each other. A bore is arranged facing towards an underside. The other hole is offset by 90 ° facing one side of the core extension. The holes are therefore in a 6 o'clock position and a 3 o'clock or 9 o'clock position. This means that the core extension can be used for both conventional and horizontal locking systems. In each case one of the bores, depending on the profile system of the lock cylinder, interacts with the locking mechanism in the event of an attack.

Below the core extension and between the first predetermined breaking point and the forend screw hole there is a hole in the lock cylinder housing, protruding into the large upper diameter, in which the locking mechanism is located. This includes a spring-loaded mandrel. The bore is arranged in such a way that in the initial state it is closer to the front surface of the outside of the lock cylinder than the blind bore of the core extension.

An additional drill protection segment is inserted between the predetermined breaking point and the locking mechanism or locking pin receptacle in the axial direction in order to protect the locking mechanism against further attacks even after the lock cylinder part has broken off.

If the lock cylinder is now attacked using the snapping method, it will first break at the predetermined breaking point in front. By placing the predetermined breaking point, the lock core remains in the outer part of the cylinder housing. The core extension connected to the lock core is displaced by the connecting pin in the direction of the outside of the lock cylinder when it is broken off, so that the spring-loaded mandrel of the locking mechanism can jump into the blind hole of the core extension. The core extension is now fixed in the locked position by the mandrel. If the force continues to act on the outer lock cylinder part, it acts on the core and on the connecting pin for the core extension. The diameter, material and / or positioning of the pin at the core end of the lock core is designed in such a way that it now breaks or bends, so that the previous connection between lock core and core extension is released.

The outer part of the lock cylinder together with the lock core has now been removed with the pliers or can be removed, the core extension has been moved into the locked position in the remaining lock cylinder part, the pin of the locking mechanism has jumped in and the connection between lock core and core extension is separated. The The core extension and thus the locking lever can no longer be turned from the outside.

An attacker now looks from the outside at a flat surface of the housing, more precisely the rear surface of the predetermined breaking point, and the fixed core extension with pressure piece. Further gripping with the pliers is no longer possible either because of the cut-out in the door leaf or because the rest of the lock cylinder part protrudes slightly from the lock cover. Against further attacks with the screwdriver, the core extension is designed in such a way that there is no edge for a powerful attachment. The part of the core extension that formerly protruded into the lock core is designed on the inside so that the screwdriver slips when a torque is applied and the force cannot act on the component itself or the locking mechanism. The pressure piece is protected by the step or taper in such a way that it cannot be removed by the attacker after the outer lock cylinder part has been broken off. Access to the coupling mechanism of the locking lever is thus also protected.

From the inside of the door, the lock cylinder can still be closed even after the outer part has been attacked and broken off. This has the advantage that the door can be opened from the inside and the building can thus be exited.

In summary, the lock cylinder according to the invention comprises a one-piece lock housing with a two-stage anti-snap function. The two-stage anti-snap function is implemented by a first, upstream predetermined breaking point in the one-piece housing, for example by an incision, which is followed by a second predetermined breaking point. The second predetermined breaking point is realized by the axial connection of the core extension. For this purpose, a locking mechanism is provided which interacts directly with the core extension without a follower pin. An axial movement of the core extension, during which the off-axis arrangement of locking pin and locking receptacle is changed to a coaxial, i.e. aligned, arrangement, triggers the locking mechanism. The locking is effected by changing the off-axis arrangement of locking pin and locking receptacle in the operating position in a locking position, that is, a coaxial, aligned arrangement of locking pin and locking receptacle in which the locking pin then engages in the locking receptacle. As a result, only one locking pin, which is pretensioned with a spring in the locking pin receptacle, is required for the implementation. A tracer pen and a tracer pen holder are dispensable. A compact locking cylinder or a compact locking device can thus be implemented which can be accommodated in a single housing. A modular structure with a housing extension is not required.

Further measures that improve the invention are specified in the subclaims or result from the following description of at least one exemplary embodiment of the invention, which is shown schematically in the figures. Identical or similar components are identified by the same or similar reference symbols in the figures.

Fig. 1

schematisch in einer Seitenansicht eine Ausführungsform eines Anti-Snap-Schließzylinders,

Fig. 2

schematisch in einer Seitenansicht eine andere Ausführungsform eines Anti-Snap-Schließzylinders,

Fig.3

schematisch in einer perspektivischen Explosionsansicht die Ausführungsform nach Fig. 1,

Fig. 4

schematisch in einer perspektivischen Ansicht eine Ausführungsform eines verlängerten Schließkerns nach Fig. 3,

Fig. 5

schematisch in einer Perspektivansicht eine Ausführungsform eines Druckstücks einer Kernverlängerung,

Fig. 6

schematisch in einer Seitenansicht die Ausführungsform nach Fig. 5,

Fig. 7

schematisch in einer Vorderansicht die Ausführungsform nach Fig. 5,

Fig. 8

schematisch in einer Perspektivansicht eine Ausführungsform eines Verlängerungsteils einer Kernverlängerung,

Fig. 9

schematisch in einer Seitenansicht die Ausführungsform nach Fig. 8,

Fig. 10

schematisch in einer anderen Seitenansicht die Ausführungsform nach Fig. 8,

Fig. 11

schematisch in einer Schnittansicht den Schnitt B-B der Ausführungsform nach Fig. 9,

Fig. 12

schematisch in einer anderen Schnittansicht die Ausführungsform nach Fig. 9,

Fig. 13

schematisch in einer Seitenansicht ein Zylindergehäuse der Ausführungsform nach Fig. 2,

Fig. 14

schematisch in einer Vorderansicht die Ausführungsform nach Fig. 1 und 2,

Fig. 15

schematisch in einer geschnittenen Seitenansicht den in Fig. 14 dargestellten Schnitt D-D der Ausführungsform nach Fig. 1,

Fig. 16

schematisch in einer geschnittenen Seitenansicht den in Fig. 14 dargestellten Schnitt D-D der Ausführungsform nach Fig. 2 und

Fig. 17

schematisch einen Ausschnitt des Anti-Snap-Schließzylinders.

Show it:

Fig. 1

schematically in a side view an embodiment of an anti-snap lock cylinder,

Fig. 2

schematically in a side view another embodiment of an anti-snap lock cylinder,

Fig. 3

schematically in a perspective exploded view the embodiment according to Fig. 1 ,

Fig. 4

schematically in a perspective view an embodiment of an elongated lock core according to Fig. 3 ,

Fig. 5

schematically in a perspective view an embodiment of a pressure piece of a core extension,

Fig. 6

schematically in a side view the embodiment according to Fig. 5 ,

Fig. 7

schematically in a front view the embodiment according to Fig. 5 ,

Fig. 8

schematically in a perspective view an embodiment of an extension part of a core extension,

Fig. 9

schematically in a side view the embodiment according to Fig. 8 ,

Fig. 10

schematically in another side view the embodiment according to Fig. 8 ,

Fig. 11

schematically in a sectional view the section BB according to the embodiment Fig. 9 ,

Fig. 12

schematically in another sectional view the embodiment according to Fig. 9 ,

Fig. 13

schematically in a side view a cylinder housing according to the embodiment Fig. 2 ,

Fig. 14

schematically in a front view the embodiment according to Figs. 1 and 2 ,

Fig. 15

schematically in a sectional side view the in Fig. 14 Section DD shown according to the embodiment Fig. 1 ,

Fig. 16

schematically in a sectional side view the in Fig. 14 Section DD shown according to the embodiment Fig. 2 and

Fig. 17

schematically a section of the anti-snap lock cylinder.

The Figures 1 to 17 show, in different views and degrees of detail, embodiments of an anti-snap lock cylinder 100 or their parts or components.

Fig. 1 shows schematically in a side view an embodiment of an anti-snap lock cylinder 100. The lock cylinder 100 is designed as a double lock cylinder 100a. A lock cylinder section faces an inside I and a lock cylinder section faces an outside A. The boundary line or boundary plane between inside I and outside A forms that through the maximum cross section of the forend screw hole 6, into which the forend screw 7, which is only indicated schematically here by the reference number 7, is inserted, radially or perpendicular to the axial axis Z. running level M. In the in Fig. 1 In the illustrated embodiment, the outer lock cylinder section is larger in the axial direction than the inner lock cylinder section 100, so that an asymmetrical design results relative to the center plane M. Symmetrical designs are possible. The double lock cylinder 100a is more precisely designed as a profile double cylinder and has a cylinder housing 2. The cylinder housing 2 is made up of a cylinder wall 4 having a cylinder opening 3 and a circular cross-section, and a web section 5 extending from it radially of the same material (see in particular Fig. 14 ). In each cylinder opening 3 there is a cylinder core or lock core 8, more precisely a lock core unit 8a, which is axially fixed for example by means of a clamping ring 11 (see in particular in this regard Fig. 3 ). The inner wall of the cylinder wall 4 forms a core bore into which the respective lock core unit 8a is inserted.

In the lock core 8, a radially cut key channel - indicated here by reference number 9 - is incorporated, which is open to one side of the lock core 8 and is aligned with a longitudinal center plane of the web section 5. In a known manner, the lock core 8 accommodates at least two-part tumbler elements, tumbler pins, tumbler pins, core pins and / or housing pins 10, which are arranged by depressions on the key shaft side or key chest side of a key (see also Fig. 3 ). The housing pins 10 interact in a known manner with the corresponding compression springs 10a and core pins 10b. The core-side ends of the tumbler pins 10, which are sprung in the direction of the key channel 9, protrude into the key channel 9 in a stop-limited manner. Such tumbler pins 10 are known, however, so that they will not be discussed in more detail. A locking unit with a locking lever 41 is received around an axis of rotation of the cylinder wall 4 in a recess or an opening or a locking lever groove 42. This is rotated around the axis of rotation Z when turning a key that matches the lock profile, that is, with a key with a corresponding key profile and key shaft-side or key-chest-side recesses that match the tumbler pins 10, thus realizing a generally known locking function of the respective lock cylinder 100. The key has, inter alia, a key shaft and / or a key face on which the key profile and, for example, in reversible key embodiments, permutation recesses or indentations are formed. The groove 42 is located both to the left and to the right of the center plane M and thus, together with the forend screw hole 6, weakens the material cross section of the cylinder housing 2 in the center plane M. So that the cylinder housing 2 is not in the area of the forend screw hole 6 in the center plane during a snapping attempt M breaks, a predetermined breaking point 80 is provided. The predetermined breaking point 80 is provided here as a slot 81 which extends radially from the cylinder wall 4 into the web 5 without completely severing the web 5. The locking unit here has a locking lever 41 without an axial change in cross section in the radial direction. Correspondingly, the complementary groove 42 is designed without any axial cross-section change in the radial direction.

Fig. 2 schematically shows another embodiment of an anti-snap lock cylinder 100 in a side view Fig. 2 The illustrated embodiment are the locking lever 41 and the groove 42, with otherwise essentially the same embodiment of the locking cylinder 100 according to FIG Fig. 1 , formed with an axial cross-sectional change in the radial direction. The locking lever 41 and the groove 42 are approximately L-shaped in the view. In this case, the locking lever 41 and the groove 42 form a larger dimension in the axial direction Z than a radially closer section at a section that is more radially remote from the axis of rotation Z. In this way, a projection or shoulder 42a is created radially closer to the axis of rotation Z between groove 42 and axis of rotation Z, which additional Creates material space. In the case of a small lock cylinder 100, this additional material space can be provided in the projection or shoulder 42a, for example for a locking mechanism 90 (see in particular in this regard Fig. 16 ).

Fig. 3 shows schematically in a perspective exploded view the embodiment according to FIG Fig. 1 . The lock core 8 or the lock core unit 8a is inserted into the cylinder housing 2 in the axial direction. The lock core 8 or lock core unit 8a, hereinafter abbreviated to lock core 8, 8a, is designed here as an elongated lock core 8. For this purpose, the extended lock core 8 has a core extension 60 in addition to the actual lock core 8, 8a or the lock core unit 8a. The core extension 60 comprises a pressure pin 61 and an extension part 65. The pressure pin 61 is received at the end of the extension part 65 directed towards the center M. The recording can take place in a form-fitting manner for the transmission of a torque. In particular, the recording can thus take place on this in a rotationally fixed manner. A detailed description of the core extension 60 and its components is given later in FIG Figures 5 to 12 . At the end facing the lock core 8, 8a, the extension part 65 has engagement means 77 for a rotationally fixed connection with corresponding engagement means 77 of the lock core 8, 8a. A pin connection is provided for an axial connection between extension part 65 and lock core 8, 8a. In this case, a pin 71, for example a dowel pin, is inserted into corresponding pin receptacles 72, which overlap in the assembled state, in the extension part 65 and in the lock core 8, 8a. Thus, extension part 65 and lock core 8, 8a are axially coupled. The lock core 8 on the inside shows in the illustrated embodiment Fig. 3 no core extension 60.

Fig. 4 shows schematically in a perspective view an embodiment of an elongated lock core 8 according to FIG Fig. 3 . The elongated lock core 8 sits inside the cylinder opening 3, on the outside of the double lock cylinder 100a. An axial coupling of the extension part 65 and the lock core 8 is realized via a pin 71 which is inserted through the pin receptacles 72. The engagement means 77 for torque transmission are also shown. These are designed here as a recess on the lock core unit 8 and as a molded part on the extension part 65. To implement a locking mechanism 90 (see e.g. Fig. 17 ) locking receptacles 93 extending in the radial direction are provided (see in particular Fig.17 ).

Fig. 5 shows schematically in a perspective view an embodiment of a pressure piece 61 of a core extension 60. The pressure piece 61 is essentially cylindrical. The pressure piece 61 has a middle part 63, from one side of which the shaft section 62 extends centrally to the middle part 63, but with a smaller one Diameter extends. An end cap 64, also with a smaller diameter, also projects centrally from its other side. The shaft section 62 is designed to be complementary to the complementary shaft receptacle of the extension part 65, which is shown in FIG Figures 8 to 12 is shown. Fig. 6 shows schematically in a side view the embodiment according to Fig. 5. Fig. 7 shows schematically in a front view the embodiment according to Fig. 5 .

Fig. 8 shows schematically in a perspective view an embodiment of the extension part 65 of the core extension 60. The core extension 60 is essentially designed as a cylindrical base body 67. This comprises the extension part (s) 65 and the pressure piece or pressure pin 61. The extension part or part 65 has a pressure piece receptacle 66 extending over its entire axial length. The pressure piece 61 with the corresponding shaft section 62 is axially received in the pressure piece receptacle 66. The pressure piece receptacle 66 is designed to be complementary to the shaft section 62, here as a cylindrical bore. Walls 68, which are designed as coupling elements for coupling with an axially adjoining coupling mechanism, are formed to protrude laterally from the base body 67. The coupling elements are designed for torque transmission. The coupling elements are located on the side facing the end cap 64 of the pressure piece 61. On the opposite side of the base body 67, engagement means 77, here in the form of a molding 69, are provided. These are designed to engage with corresponding engagement means 77 of the lock core 8, so that a torque can be transmitted from the lock core 8 to the core extension 60 or vice versa via engagement of the engagement means 77. Fig. 9 shows schematically in a side view the embodiment according to Fig. 8. Fig. 10 shows schematically in another side view the embodiment according to FIG Fig. 8. Fig. 11 shows schematically in a sectional view the section BB of the embodiment according to Fig. 8. Fig. 12 shows schematically in another sectional view the embodiment according to FIG Fig. 8 . As from the Figures 8-12 It can also be seen that the extension part 65 has an eccentric through opening 17. The through opening 17 forms the pressure piece receptacle 66 so that the pressure piece 61 rests in the through opening 17. Two locking recesses, locking receptacles or locking pin receptacles 93 designed as blind holes are provided radially on the base body 67. The locking pin 93b can engage in this when triggered. The locking receptacles 93 are arranged offset from one another by 90 °.

Fig. 13 shows schematically in a side view a cylinder housing 2 of the embodiment according to Fig. 2 . The opening 42 has a larger dimension in the Z direction radially away from the axis of rotation Z, so that an L-shape results here in the side view. The locking mechanism 90 is provided above the leg of the L-shape protruding in the Z-direction, here represented by the dashed line. This is in Fig. 15 shown in more detail. In The predetermined breaking point 80, designed as a slot 81, is offset towards the outside A. When the outer cylinder section breaks off, the core extension 60 is moved towards the outside, the locking mechanism 90, more precisely the locking pin 93b, engaging the locking receptacle 93 of the extension part 65.

Fig. 14 shows schematically in a front view the embodiment according to Fig. 13 . A description of the Fig. 13 has already been done above. In the view, the illustrated embodiment of the cylinder housing 2 does not differ from the embodiments of the cylinder housing Fig. 1 or Fig. 2 , since, for example, the locking lever groove 42 is not visible here. Thus can Fig. 13 also the embodiment of the cylinder housing according to Fig. 1 represent.

Fig. 15 shows schematically in a sectional side view the in Fig. 14 shown section DD, but according to a cylinder housing 2 according to the embodiment Fig. 1 Here the opening 42 is formed with a constant cross section. In addition to the locking mechanism 90, shown here by the locking pin receptacle 93a on the housing, a cylindrical pin is provided at 94. The cylinder pin serves here as an additional drill protection segment between the predetermined breaking point 80 and the locking mechanism 90.

Fig. 16 shows schematically in a sectional side view the in Fig. 14 shown section DD, here according to a cylinder housing 2 according to the embodiment Fig. 2 . In this embodiment, the opening 42 is designed with a cross-section that is changed in the radial direction. In addition to a locking pin 93 (not shown here) of the housing-side locking pin receptacle 93a adjacent to the locking mechanism 90, a receptacle 94a for the cylindrical pin 94 designed as a drill protection segment is provided adjacent to that of the outer side A.

Fig. 17 schematically shows a section of the anti-snap lock cylinder 100 or an embodiment thereof in a sectional view. In particular, the locking mechanism 90 can be clearly seen in the sectional view. In the figure shown, this includes the locking pin 93b, which is pressurized by a compression spring 10b. The compression spring 10b and the locking pin 93b are arranged in the locking pin receptacle 93a on the housing side. The arrangement is such that the pressurized locking pin 93b is pressed against the core extension 60 on one side. The locking receptacle or locking recess 93 is provided in the extension part 65 of the core extension 60. The locking receptacle 93 is oriented in the same way - radially - as the locking pin 93b. The locking receptacle 93 is designed such that the locking pin 93b can move into or engage in the locking receptacle 93 when the locking receptacle 93 and the housing-side locking pin receptacle 93a are approximately coaxial are arranged to each other. In the starting or operating position shown, the locking receptacle 93 is arranged offset to the locking pin receptacle 93a and thus also to the locking pin 93b. The spring-pressurized locking pin 93b thus presses against the extension part 65 of the core extension 60. During a snapping attempt, the core extension 60 with the extension part 65 is moved outward A. As a result, the locking receptacle 93 is brought into an extension of the housing-side locking pin receptacle 93a, so that these are arranged coaxially and / or axially in alignment. In this aligned arrangement, the locking pin 93b pretensioned by the compression spring 10b partially enters the locking receptacle 93 in the extension part 65, so that further movement of the extension part 65 is blocked due to the engagement of the locking pin 93b in the extension part 65. The cylinder pin 94 serving as a drill protection is provided laterally next to the locking mechanism 90 in the direction outside A. The locking lever 41 with the further locking cylinder 100 mechanism is arranged in the inner direction I. The basic design of the locking mechanism 90 in the case of a stepped locking lever 41 is similar to that of a non-stepped locking lever 41. The two embodiments essentially differ in the size of the locking pin 93b and the locking pin receptacle 93a on the housing. The functioning of the locking mechanism 90 is the same in both cases.

It goes without saying that the aforementioned features of the invention can be used not only in the respectively specified combination, but also in other combinations or on their own, without departing from the scope of the invention.

List of reference symbols

2

Cylinder housing

3

Cylinder opening

4th

Cylinder wall

5

Web section

6th

Forend screw hole

7th

Forend screw

8th

Lock core (extended)

8a

Lock core unit

9

Key channel

10

Tumbler pins, tumbler pins, tumbler elements, housing pins

10a

Core pin

10b

Compression spring

11

Clamping ring

17th

Through opening

41

Locking lever

42

Locking lever groove

42a

Ledge, shoulder

60

Core extension

61

Pressure pin, pressure piece

62

Shaft section

63

Middle part

64

End cap

65

Extension part

66

Pressure piece holder

67

Base body

68

Wall

69

Molding

71

pen

72

Pen holder

77

Means of intervention

80

Predetermined breaking point (housing side)

81

slot

90

Locking mechanism

93

Locking receptacle (core extension), locking recess

93a

Locking pin receptacle (housing side)

93b

Locking pin

94

Straight pin

94a

admission

100

Anti-snap lock cylinder

100a

Double lock cylinder

M.

Middle plane

A.

Outside, outside

I.

Inside, inside

Z

Z-axis, rotation axis (axial direction)

Claims (13)

1. A core extension (60), in particular a core extension (60) for a lock core (8) of a lock cylinder (100) which extends substantially in an axial direction (Z), in order to axially extend a lock core (8), wherein the core extension (60) is designed in several parts and comprises at least one extension part (65) and at least one pressure piece (61) adjoining it in the axial direction (Z), wherein the extension part (65) has an eccentric pressure piece receptacle (66) for receiving the pressure piece (61) in which the pressure piece (61) is at least partially received and/or can be received in order to realize an interaction of pressure piece (61) and extension part (65), wherein the extension part (65) has connection means (72) for connection to corresponding connection means (72) of the lock core (8), wherein the connection means form a predetermined breaking point of the core extension, wherein the extension part (65) has at least one locking recess (93) extending transversely to the axial direction (Z) for interaction with a locking mechanism (90), in particular for receiving a pin (93b), wherein the connecting means of the lock core (8) and extension part (65) are configured for an axial coupling and here for a pin connection, so that in this way an at least positive connection is realized.
2. An extended lock core (8) for a lock cylinder (100) of a cylinder lock, comprising at least a lock core unit (8a) and at least a core extension (60), wherein the lock core unit is secured with the core extension (60) via corresponding connection means of the lock core unit (8a) and the core extension (60) in the axial direction (Z), wherein the connection of the lock core side connection means and the core extension side connection means is configured as a pre-determined breaking point, at which in the case of a corresponding applied force the lock core unit (8a) can be separated from the core extension (60), wherein the corresponding connection means are configured as a pin (71) and pin receptacle (70).
3. The extended lock core (8) according to claim 2, characterized in that
   the corresponding connection means are configured as a pin (71) and pin bore.
4. An anti-snap lock cylinder (100) for a cylinder lock having at least a lock core (8) and a cylinder housing (2), in which the lock core (8) is accommodated, wherein the cylinder housing (2) has at least one pre-determined breaking point (80) shifted forward, characterized in that
   a locking mechanism (90), which, in the event of an axial movement of the lock core (8) in a lock core withdrawal attempt locks the core extension (60) against an axial outward movement in the cylinder housing (2) and wherein the anti-snap lock cylinder (100) provides a further pre-determined breaking point outside of the pre-determined breaking point (80) at the cylinder housing (2) which is provided on a different component of the anti-snap lock cylinder (100) than on the cylinder housing (2) itself, in order to realize a two-stage anti-snap function, wherein the lock core (8) is configured as an extended lock core (8) according to any of the preceding claims 2 or 3, wherein the further pre-determined breaking point is formed by the connection of or the connection means of the core extension (60) and of the lock core unit (8a).
5. The anti-snap lock cylinder (100) according to claim 4, characterized in that
   the locking mechanism (90) has at least one locking pin (93b) in a locking pin receptacle (93a) in a cylinder housing (2) pre-stressed directly against a lock core (8) or an extended lock core (8), which in the event of axial movement in a lock core withdrawal attempt of the extended lock core (8) interacts with the core extension (60) or the extended lock core (8).
6. The anti-snap lock cylinder (100) according to claim 4 or 5, characterized in that
   the core extension (60) is configured as a core extension (60) according to claim 1.
7. The anti-snap lock cylinder (100) according to any of preceding claims 4 to 6, characterized in that
   the locking pin receptacle (93a) is arranged upstream in an operating position of the locking recess (93).
8. The anti-snap lock cylinder (100) according to any of preceding claims 4 to 7, characterized in that
   the cylinder housing (2) has a locking lever groove (42) for a locking lever (41) pivotable around an axis of rotation (Z), wherein the locking lever (41) and/or the locking lever groove (42) has a shoulder, so that the groove (42) and/or the lever (41) has differing dimensions in the axial direction (Z) .
9. The anti-snap lock cylinder (100) according to any of preceding claims 4 to 8, characterized in that
   a first shoulder portion with a smaller axial dimension is arranged closer to the axis of rotation (Z) of the lock core (8) than a shoulder portion with a greater axial dimension and the locking mechanism (90) is arranged in the lock cylinder (100) in radial direction above the shoulder portion with the greater axial dimension and/or next to the shoulder portion with the smaller axial dimension.
10. The anti-snap lock cylinder (100) according to any of preceding claims 4 to 9, characterized in that
    the anti-snap lock cylinder (100) is configured as a double-lock cylinder (100a) with an outer (A) lock cylinder portion and an inner (I) lock cylinder portion.
11. A locking device (100), comprising at least a key and at least a corresponding lock core (8) and/or a corresponding lock cylinder (100), characterized in that
    the lock core (8) is configured as an extended lock core (8) according to any of previous claims 2 or 3 and/or the lock cylinder (100) is configured according to an anti-snap lock cylinder (100) according to any of previous claims 4 to 10 and the key to the anti-snap lock cylinder (100) and/or to the extended lock core (8) corresponds to and/or is assigned to it.
12. A method for anti-snap securing an anti-snap lock cylinder (100) according to any of previous claims 4 to 10, wherein in the event of an anti-snap attempt, in which a transverse force is applied on the outer (A) lock cylinder portion, at first the first pre-determined breaking point (80) of the cylinder housing (2) breaks and in the event of further application of the transverse force on the outer (A) lock cylinder portion the second pre-determined breaking point on different component of the anti-snap lock cylinder (100) than the cylinder housing (2) breaks and/or
    between the breaking of the first pre-determined breaking point (80) and breaking of the second pre-determined breaking point of the locking mechanism (90) engages in the locking recess (93).
13. A method for manufacturing an anti-snap lock cylinder (100) according to any of the preceding claims 4 to 10, comprising the steps:

    Provision of a first pre-determined breaking point (80) in the cylinder housing (2), in particular in the single piece cylinder housing (2) and

    Provision of a second pre-determined breaking point on a different component of the anti-snap lock cylinder (100) than the cylinder housing (2), in the extended lock core (8), more precisely between the lock core (8) and the core extension (60) .

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