EP2166179A1 - Lock cylinder, in particular for a door lock - Google Patents

Abstract

The lock cylinder (10) has a housing (12) and a housing pin (32), which has an outer pin part and an inner pin part. The outer pin part is formed as a casing, which accommodates the inner pin part and guides in an axial direction of the housing pin in a sliding manner. A spring device (33) lies at the ends of the outer pin part and the inner pin part of the housing pin. The ends are turned away from the core (14). The inner pin part is movable against the pressure of the spring device in the direction of the receiving chamber (16) independent of the outer pin part.

Description

The invention relates to a lock cylinder, in particular profile cylinder, preferably for a door lock, wherein the lock cylinder is secured against manipulation using the so-called impact technique.

Locking cylinders have a housing in which a receiving space for receiving a core is formed. The core is rotatably mounted in the receiving space of the housing. In the core there are a plurality of first receiving bores, which in particular extend radially, starting from the key-receiving lock channel to the outside of the core. In the housing also a plurality of second receiving bores are formed, which are open to the receiving space and also extend radially to the core. In a certain rotational position of the core, the first and second mounting holes are aligned in pairs. In the first receiving holes of the core are closing or core pins, while in the second mounting holes of the housing locking or housing pins are located, which are usually pressed by spring force against the core pins. By inserting a key into the lock channel, the core pins are radially disengaged in accordance with the configuration of the key blade. The lock cylinder is opened when the mating surfaces of all pairs of core and housing pins are aligned with the outer surface of the core.

Lock cylinder of the aforementioned type are, for example DE-C-199 34 883 . FR-A-2 312 630 and US-A-3,802,234 known.

Lock cylinders are generally considered burglar resistant, but unfortunately are not always protected from all types of manipulation. It is particularly disadvantageous if it is not possible to recognize on a lock cylinder not opened with the proper key that it has been opened by manipulation in an inadmissible manner. In addition to the inconvenience associated with a theft inconvenience, the injured party then still has the problem of being unable to prove that the lock cylinder has been opened by unauthorized manipulation.

In the case of the lock cylinders described in the aforementioned documents, the manipulation attempt leads to the usability of the lock cylinder.

In recent times, burglary or burglary attempts have become known in which the so-called striking technique was used. Here, a prepared key whose key bit profile is equal to the profile of the closing channel, driven with a percussion tool jerkily into the core. The movement impulse on the key also gives all housing and core pins a movement impulse. With skilful handling of the striking technique, it is possible that the ends of all the core pins facing away from the key bit as well as the housing pins are aligned with the outside of the core, so that the core can be rotated. Similarly, a manipulation attempt with a so-called Elektropicksystem works.

Out US 2002/0189309 A1 a lock cylinder is known in which one of the housing pins is formed in two parts and has a cylindrical first pin part with an axial blind hole, as well as a second pin part received by this with mushroom head. The mushroom-head end of the second pin part bears against the housing pin spring, while the cylindrical first pin part faces the core of the lock cylinder.

From the DE 103 49 348 B3 and the DE 10 2005 037 194 B4 Further lock cylinders are known in which housing pins are formed in two parts from a cylindrical first pin part with axial blind hole and a second pin part with mushroom head. The cylindrical first pin part bears against the housing spring, while the mushroom head end of the second pin part faces the core of the lock cylinder.

In the case of the two-part housing pins described in the named protective rights, the second pin part is received together with a spring in the first pin part, so that the two pin parts can be compressed against a spring force.

It has the in the DE 10 2005 037 194 B4 described housing pin on a lock with which the second pin part in the first pin part with preloaded spring is lockable, wherein the inner pin part is detached from the outer pin part by hitting the housing pin on a stop surface and is conveyed out of the outer pin part by the spring force.

The Indian DE 103 49 348 B3 described multi-part housing pin moves in the event of manipulation so uncontrolled that an alignment of the core pin, which bears against the two-piece housing pin, with the outside of the core is almost impossible.

Further, lock cylinders are known which have a multi-part core pin, which ensures in case of manipulation for the locking of the core. Examples of this can be found in the CH 669 632 A5 and the US 5,966,971 A ,

However, these known lock cylinder with multi-part core pin are constructed quite expensive, as far as the core pins, which is why the known lock cylinder are quite expensive.

The known multi-part housing pins allow reliable protection against manipulation, however, usually only when a multi-part housing pin is provided in two or more mounting holes. Furthermore, the multi-part construction of the housing pin with a spring for coupling the pin parts usually requires a complicated filling of the housing by hand, as a machine filling, without the housing parts tilt against each other, is not possible in a reliable manner.

The invention is therefore an object of the invention to provide a lock cylinder with a multi-part housing pin, the core pin is easy to install easy to install and provides reliable protection against manipulation.

To achieve the object serve the features of claim 1.

The invention advantageously provides a lock cylinder, in particular for a door lock, with a housing, which has a receiving space and at least one receiving bore opening into the receiving space, in which a spring pin is arranged in the direction of the receiving space biased housing pin, and with a core which is rotatably disposed in the receiving space and has a closing channel for a key and at least one receiving bore for a core pin, which extends between the closing channel and the outside of the core and in a predetermined basic rotational position of the core with the at least one receiving bore of the housing is aligned, wherein the at least one housing pin has an outer pin part and at least one inner pin part.

In this case, the outer pin part is designed as a sleeve open on both sides, which receives the at least one inner pin member and slides in the axial direction of the housing pin, such that the at least one inner pin member freely in the outer pin member and slidable at both ends of the outer Pin part is telescopically moved out. The spring device abuts against the end remote from the core of the outer and at least one inner pin part of the housing pin, such that in the predetermined basic rotational position of the core, the at least one inner pin part protrudes toward the receiving space relative to the outer pin part and independent of the outer pin part against the pressure of the spring device in the direction of the receiving space is movable away.

In the manipulation attempt of a lock cylinder with the aid of the striking technique, rotation of the core is primarily made possible by the housing pins receiving a movement impulse and tilting momentarily on the outer surface of the core, so that the areas of the housing pins facing the receiving space are aligned with the outer surface of the core. If this happens with all housing pins, turning the core is possible.

The inventive solution with a housing pin, which consists of an outer pin member and at least one inner pin member, wherein the inner pin member is freely slidable in the outer pin member and telescopically movable out at both ends of the outer pin member, is made possible by a motion pulse on the housing pin, the inner pin member can move independently of the outer pin member against the spring force of the spring direction. The outer pin part remains in the locking position. If a particularly strong impulse of movement is exerted by the core pin on the housing pin, it may happen that the outer pin part is also moved. In this case, however, only the outer pin member on the outer surface of the core can tilt and the inner pin member is moved out of the spring after completion of the movement pulse from the core-facing end of the outer pin member and partially into the receiving bore of the core, so that the inner pin part prevents rotation of the core.

The fact that it is provided that the at least one inner pin part protrudes in the basic rotational position of the core in the direction of the receiving space relative to the outer pin part ensures that a movement pulse originating from the core pin is first transferred to the at least one inner pin part.

Experiments have shown that even the provision of a housing pin according to the invention reliably prevents the manipulation of a lock cylinder according to the invention.

The two-part design of at least one of the housing pins has the advantage that it takes place at a bias of the core, as in today's usual manipulation attempts by the impact technique, by electropick devices or by the single Hineinbewegen the housing pins, even then to a relief of Kerns comes when the receiving space facing side of the outer pin portion of the housing pin is equal to the level of separation of the housing and core. But then the core can not be turned further, because the inner pin part blocks the rotation. Since it is not clear to the manipulator that the relief of the prestressed core does not occur due to the completely inserted housing pin, it can not counteract this type of "core relief" either. Thus, there is effective protection against manipulation by utilizing dynamic processes in the housing and core receiving bores.

It is preferably provided that the housing and the core each have a plurality of housing or core pins provided receiving bores and that at least one of the housing pins has an outer pin part and at least one inner pin part.

The provision of a plurality of housing bores or core pins provided receiving bores can additionally prevent the success of a manipulation attempt.

Preferably, it is provided that the spring device comprises a helical spring, which tapers conically at the end facing the housing pin, such that the spring device projects partially into the outer pin part for abutment with the at least one inner pin part.

It may also be provided that the spring device is formed of an outer coil spring and at least one inner coil spring, which are arranged substantially coaxially with each other, wherein the at least one inner coil spring rests against the at least one inner pin member and the outer coil spring on the outer pin member ,

It can be provided that the outer coil spring and the at least one inner coil spring have a different spring stiffness, wherein it is preferably provided that the at least one inner coil spring has a lower spring stiffness than the outer coil spring.

In this way, a movement pulse applied to the housing pin by the core pin may allow the at least one inner pin member to move faster than the outer pin member, such that when, for example, the outer pin member is aligned with the outer surface of the core, the inner pin member has already reduced the motion impulse and has been pressed by the spring force of the at least one inner coil spring back into the locking position.

Preferably, it can be provided that the at least one inner pin part and the outer pin part have the same length. By providing a same length in the at least one inner pin member and the outer pin member manufacturing and assembly of the housing pins in a simple manner is possible.

In a preferred embodiment, it is provided that the at least one inner helical spring projects in the direction of the receiving space relative to the outer helical spring and has an outer diameter adapted to the outer pin part, such that the at least one inner helical spring is at least partially receivable in the outer pin part. This makes it possible that in a simple manner the inventively provided protrusion of the inner pin member relative to the outer pin member can be generated.

The inner pin part may be a pin or a sleeve.

In a particularly preferred embodiment, two inner pin parts are provided, which consist of an inner sleeve and an inner pin, wherein the inner pin is freely displaceable in the inner sleeve and telescopically movable out at both ends of the inner sleeve.

By providing two inner pin parts, which are movable as described, three parts of the housing pin are provided together with the outer pin part, which are movable independently of each other. As a result, it can additionally be prevented that the complete housing pin canted in a tampering attempt to release the core.

It can be provided that the spring means abuts the outer pin member, the inner sleeve and the inner pin, such that in the predetermined basic rotational position of the core of the inner pin relative to the inner sleeve and the inner sleeve relative to the outer pin member projecting toward the receiving space and respectively are independently movable against the pressure of the spring device in the direction of the receiving space away.

Preferably, it is provided that the spring device consists of three substantially coaxially arranged coil springs, wherein in each case a coil spring bears against the outer pin part of the inner sleeve and the inner pin.

This makes it possible that each part of the three-piece housing pin presses against a spring with different spring constant, so that in a tampering attempt uncontrollable movement of the three parts of the housing pin is generated. This additionally reduces the chance of success of a manipulation attempt.

In a particularly preferred embodiment, it is provided that in each case two adjacent coil springs have opposite slopes. This can ensure that the coil springs do not get caught, since in each case the outer coil spring guides the inner coil spring.

In one embodiment it can be provided that on the spring means a conically shaped lid is arranged, which projects at least partially into the outer pin part or into the outer pin part and the inner sleeve for abutment of the spring means on the housing pin, wherein the lid is preferably for guiding the lid at least partially protrudes into the spring means or at least partially surrounds the spring means.

In a particular embodiment, it can be provided that the core pin consists of an outer core pin part, which is formed as a sleeve, and at least one inner core pin part, wherein the outer core pin part receives the inner core pin part and slidably leads in the axial direction of the core pin. It can be provided that the diameter of the outer core pin part is adapted to the diameter of the outer core pin part of the housing pin and / or the diameter of the at least one inner core pin part is adapted to the diameter of the at least one inner pin part of the housing pin.

By providing a multi-part core pin, it can rest on the housing pin in such a way that, for example, the at least one inner core pin part projects in the direction of the closing channel with respect to the outer core pin part. In a manipulation attempt, such as with the aid of the impact technique, the key is applied to the at least one inner core pin part, so that the movement pulse is transmitted only to the at least one inner core pin part. From the at least one inner core pin part of the movement pulse is then transmitted to the at least one inner pin part of the housing pin, so that only this is moved away in the direction of the receiving space in the second receiving bore. The outer core pin part and the outer pin part of the housing pin remain in the starting position and lock the lock.

Fig. 1

eine schematische Darstellung eines Schließ- bzw. Profilzylinders im Längsschnitt im Verriegelungszustand ohne eingeführten Schlüssel,

Fig. 2

eine schematische Darstellung des Schließ- bzw. Profilzylinders von Fig. 1 im Längsschnitt im Öffnungszustand mit Schlüssel,

Fig. 3

eine schematische Darstellung des Bereichs 3 der Fig. 1 im vergrößerten Maßstab zur Verdeutlichung des mehrteiligen Gehäusestiftes,

Fig. 4

eine zweite Ausführungsform eines erfindungsgemäßen mehrteiligen Gehäusestiftes schematisch im Schnitt in der Verriegelungsposition,

Fig. 5

eine dritte Ausführungsform eines erfindungsgemäßen Gehäusestiftes mit alternativ ausgestalteter Feder in der Verriegelungsposition im Schnitt und

Fig. 6

eine alternative Ausgestaltung der Feder des in der Fig. 3 dargestellten Ausführungsbeispiels.

In the following, we will explain the invention with reference to the figures. Show it:

Fig. 1

a schematic representation of a lock or profile cylinder in longitudinal section in the locked state without inserted key,

Fig. 2

a schematic representation of the closing or profile cylinder of Fig. 1 in longitudinal section in the open state with key,

Fig. 3

a schematic representation of the area 3 of Fig. 1 on an enlarged scale to clarify the multi-part housing pin,

Fig. 4

a second embodiment of a multi-part housing pin according to the invention schematically in section in the locking position,

Fig. 5

a third embodiment of a housing pin according to the invention with alternatively ausgestalteter spring in the locking position in section and

Fig. 6

an alternative embodiment of the spring in the Fig. 3 illustrated embodiment.

In the Fig. 1 to Fig. 3 a first embodiment of a lock cylinder 10 is shown. The lock cylinder 10 has a housing 12 and a core 14, which is rotatably arranged in a receiving space 16 of the housing 12. The core 14 is provided with an eccentric axial closing channel 18, in which the key 20 can be inserted. In the core 14 there are a plurality of core pins 30 arranged one behind the other in the axial extent of the core 14 (five core pins in a row in the exemplary embodiment), which are located in (first) receiving bores 24 of the cylinder core 14. These receiving bores 24 extend radially through the core 14 between its closing channel 18 and its outer surface 38.

In the housing 12 are also several (second) receiving holes 28, the number and arrangement of the number and arrangement of the first mounting holes 24 are the same. The second receiving bores 28 extend radially relative to the receiving space 16 of the housing 12 and are in accordance with the basic rotational position of the core 14 Fig. 1 arranged in alignment with the first receiving holes 24. While, as already mentioned above, the core pins 30, which may be of different lengths, are arranged in the first mounting bores 24, housing pins 32 are arranged in the second mounting bores 28 and are biased against the core pins 30 by spring means 33. The spring means 33 press on the housing pins 32, the core pins 30 against the located in the closing channel 18 ends of the first mounting holes 24 (see Fig. 1 ). In this situation, the housing pins 32 extend within both the first and second receiving bores 24, 28, so that rotation of the core 14 by the housing pins 32 is prevented.

How out Fig. 2 can be seen, with the key inserted 20, the core pins 30 are moved radially outwardly, by the key 20. The vote of the width of the key 20 along the length thereof is matched to the length of the core pins 30, that this with inserted key 20 with the Outer surface 38 of the core 14 are aligned. In this situation, the housing pins 32 are completely moved back into the second receiving holes 28, so that the core 14 can now rotate.

The peculiarity of in Fig. 1 Locking cylinder 10 shown is that one of the housing pins 32 is made of several parts, the parts of which move independently in the event of manipulation. In this embodiment, as seen from the opening of the closing channel 18 from last housing pin 32 is formed in several parts, as it is in Fig. 2 is shown.

In Fig. 3 is an enlarged view of the area 3 of Fig. 1 to illustrate the structure of a multi-part housing pin 32 according to the invention shown schematically. The housing pin 32 has an outer pin part 34 and an inner pin part 36.

The outer pin member 34 is formed as a sleeve open on both sides, which receives the inner pin member 36 and slidingly leads in the axial direction of the housing pin 32. The design of the outer pin part 34 as a sleeve, it is possible that the inner pin member 36 is freely displaceable in the outer pin member 34 and at both ends of the outer pin member 34 is telescopically movable out. In the in Fig. 3 illustrated embodiment, the inner pin member 36 is telescopically moved in the direction of the receiving space 16 relative to the outer pin member 34 so that it protrudes from the outer pin member 34. In the in Fig. 3 illustrated embodiment, the housing pin 32 is in the second receiving bore 28 and the first receiving bore 24 so that it extends over the parting plane between the core 14 and the housing 12 and thus prevents rotation of the cylinder 14. On the one of the Receiving space 16 facing away from the end of the housing pin 32, a spring device 33 is disposed in the second receiving bore 28, which abuts against the end facing away from the receiving space 16 of the housing pin 32. At the in Fig. 3 illustrated embodiment, the spring means 33 is configured as a helical spring, which tapers in such a way that the coil spring projects partially into the outer pin member 34 to abut the inner pin member 36. At the same time, the spring device 33 also bears against the outer pin part 34.

The spring device 33 slightly biases the housing pin 32 against the core pin 30, so that the inner pin part 36 rests against the core pin 30.

In a normal closing operation of the core pin 30 is pressed by the key into the first receiving bore 24 into that the inner pin member 36 and the outer pin member 34 is pushed away in the direction of the receiving space 16 in the second receiving bore 28 until the core pin 30 with the outer surface 38 of the core 14 is aligned, so that a rotation of the core 14 is possible.

In a manipulation attempt, a motion pulse is transmitted from the core pin 30 by a blow on the housing pin 32, wherein the motion pulse is first transmitted to the inner pin member 36. If the impact on the core pin 30 is only relatively small, the impact is transmitted only to the inner pin member 36 so that it is pressed against the spring force of the spring means 33 in the second receiving bore 28. The outer pin part 34 remains in the in Fig. 3 shown position and is not moved. As a result, the lock cylinder remains in the locking position and a rotation of the core 14 is not possible.

When a stronger momentum is applied to the housing pin 32 by the core pin 30, so that the core pin 30 also hits the outer pin portion 34, at the time of impact of the core pin 30 on the outer pin portion 34 of the inner pin member 36 of the housing pin has already been moved against the spring force of the spring means 33 over a longer distance, so that at the time when the outer pin member 34 is in the release position by the motion pulse, the inner pin member 36 already back has been moved into the first receiving bore 24 or is moved.

In the event that the outer pin member 34 canted on the outer surface 36 of the core 14, nevertheless, the inner pin member 36 can be at least partially moved back into the first receiving bore 24 by the spring means 33, so that by the inner pin member 36, the rotational movement of the core 14 is blocked.

In Fig. 4 a second embodiment of a multi-part housing pin 36 according to the invention is described. The housing pin 32 is in the locking position, in which it is located in the first and the second receiving bore 24,28 and thus extends over the parting plane between the core 14 and housing 12, such that a rotation of the core 14 is not possible.

The housing pin 32 is in the in Fig. 4 illustrated embodiment of an outer pin member 34 and two inner pin members 36, wherein the two inner pin members 36 are an inner sleeve 36a and an inner pin 36b.

On the side remote from the receiving space 16 end of the housing pin 32, a spring device 33 is arranged, which in the in Fig. 4 illustrated embodiment consists of three substantially coaxially arranged coil springs 33a-c. An outer coil spring 33a is applied to the outer pin member 34, a central coil spring 33b on the inner sleeve 36a and an inner spring 33c on the inner pin 36b. In this case, the coil springs 33a-c are designed such that the inner pin part 36 relative to the outer pin part 34 and the inner pin 36b relative to the Inner sleeve 36a protrudes toward the receiving space 16. The middle coil spring 33b is dimensioned such that it can protrude at least partially into the outer pin part 34, while the inner coil spring 33c is dimensioned such that it can protrude into the inner sleeve 36a for abutment with the inner pin 36b. As in Fig. 4 is indicated by the different line thickness of the coil springs 33a-c, the coil springs 33a-c different spring stiffness, wherein the spring stiffness of the inner coil spring 33c is less than the spring stiffness of the middle coil spring 33b and the spring stiffness of the middle coil spring 33b is in turn lower than that Spring stiffness of the outer coil spring 33a.

In this way, it is possible that the action of a movement pulse through the core pin 30 first the inner pin 36b is moved in the direction of the receiving space 16 away in the first receiving bore 28, before the inner sleeve 36a and finally the outer pin member 34 in the same Be moved direction. Due to the different spring stiffnesses, the speed and the distance covered of the individual pin parts of the housing pin 32 is different, so that at the time when, for example, the outer pin part 34 has been moved completely into the second receiving bore 28, the inner pin 36b has already reduced the motion pulse and get back in the in Fig. 4 is shown, so that a rotational movement of the core 14 is prevented. When tilting the outer pin part 34 with the outer surface 36 of the core 14, the two inner pin parts 36a, 36b can be moved freely in the direction of the receiving space 16 in order to ensure a locking position. In this way, the success of a manipulation attempt is prevented for example by means of the striking technique.

In Fig. 5 is a further embodiment of a lock cylinder according to the invention with multi-part housing pin 32 shown schematically in section. The housing pin 32 consists of an outer pin member 34 in the form of a sleeve and an inner pin member 36, which is also designed as a sleeve.

This in Fig. 5 illustrated embodiment substantially corresponds to in Fig. 3 illustrated embodiment of the housing pin, with the difference that the inner pin member 36 is designed to be longer than the outer pin member 34th

Further, the spring means 33 does not taper in the form of a helical spring, but has a conically shaped lid which at least partially projects into the outer pin part 34 to abut on the inner pin part 36. The outer pin member 34 is provided on its side facing the spring device with a chamfer to form a contact surface with the conically shaped lid and to prevent jamming of the lid with the outer pin member 34.

The lid 40 has a bolt portion 41 which projects into the spring means 33 to guide the lid and hold it in position. Alternatively, it can also be provided that the cover has an overhang, with which it can surround the spring device 33.

The function of in Fig. 5 shown housing pin corresponds approximately to the operation of the in Fig. 3 shown housing pin.

In Fig. 6 is a further embodiment of a lock cylinder according to the invention shown enlarged in section. The in Fig. 6 illustrated housing pin 32 corresponds to that in the in Fig. 3 illustrated housing pin.

The spring device 33 is in the in Fig. 6 illustrated embodiment of an outer coil spring 33a and an inner coil spring 33c, which are arranged substantially coaxially and configured so that the outer coil spring 33a abuts the outer pin member 34 and the inner coil spring 33c on the inner pin member 36th da in. In Fig. 6 illustrated embodiment, the outer pin member 34 and the inner pin member 36 are formed identically long, the inner coil spring 33c protrudes into the outer pin member 34 to ensure that the inner pin member 36 projects relative to the outer pin member 34 in the direction of the receiving space 16. In the in Fig. 6 illustrated embodiment, the inner coil spring 33c has a lower spring stiffness than the outer coil spring 33a, to ensure an uncontrolled movement between the outer pin member 34 and the inner pin member 36 in a tampering attempt, as already with respect to the Fig. 4 has been described.

In the in Fig. 6 illustrated embodiment, the outer coil spring 33a is the same length as the inner coil spring 33c, wherein the coil springs 33a, c bear against a closure screw 42 at the end remote from the housing pin 32 end. The closure screw 42 is conically shaped at the end facing the helical springs, in order to ensure that the inner helical spring 33c protrudes from the outer helical spring 33a and thus protrude from the inner pin part 36 with respect to the outer pin part 34.

In the provision of a plurality of coil springs, which run into each other, the respective adjacent coil springs preferably have opposite slopes in order to ensure an advantageous guidance of the respective inner spring.

The spring device need not necessarily be designed as a helical spring. It is also possible to provide other spring devices. Depending on the purpose and design of the lock cylinder, it may be advantageous to design the inner pin part or the inner pin parts of different lengths relative to the outer pin part.

Furthermore, it can be provided that the core pin is designed in several parts. In this case, the core pin of an outer core pin part, which is designed as a sleeve, and at least one inner core pin part. The outer core pin part absorbs the inner core pin part and guides it in the axial direction of the core pin. Ideally, it is provided that the diameter of the outer core pin part is adapted to the diameter of the outer pin part of the housing pin and / or the diameter of the at least one inner core pin part to the diameter of the at least one inner pin part of the housing pin.

In the basic rotational position of the core with the key not inserted, the housing pin then bears against the core pin. Due to the fact that the at least one inner pin part of the housing pin projects in the direction of the receiving space relative to the outer pin part of the housing pin, the at least one inner core pin part also projects in the direction of the closing channel with respect to the outer core pin part. When inserting a regular key then both core pin parts are pressed in the direction of the housing pin part, so that a regular release of the core to perform a rotational movement. The key and the core pin parts are adapted to each other so that when inserted key, the outer and the at least one inner core pin part on the housing pin side facing form a straight surface which is flush with the outer surface of the core. The housing pin can thus slide over the Kernstiftteile during the rotational movement of the core.

In manipulation attempts, however, the manipulation key introduced for manipulation meets only the at least one inner core pin part, so that a movement pulse is exerted by the latter in the direction of the housing pin. The at least one inner core pin part is thereby moved in the direction of the housing pin, wherein the outer core pin part remains in the original position. The at least one inner core pin part presses the at least one inner pin part of the housing pin against the spring force of the spring device into the second receiving bore. In this case, the outer pin part of the housing pin remains in the original position, so that the core of the lock cylinder is still locked.

A manipulation of the lock with the help of the striking technique is almost impossible in this way.

Claims (15)

Lock cylinder, in particular for a door lock, with - A housing (12) having a receiving space (16) and at least one opening into the receiving space (16) receiving bore (28), in which at least one with a spring means (33) in the direction of the receiving space (16) biased housing pin ( 32) is arranged, and - A core (14) which is rotatably disposed in the receiving space (16) and a closing channel (18) for a key and at least one receiving bore (24) for a core pin (30) which extends between the closing channel (18) and the outer side of the core (14) extends and in a predetermined basic rotational position of the core (14) with the at least one receiving bore (28) of the housing (12) is aligned, - wherein the at least one housing pin (32) has an outer pin part (34) and at least one inner pin part (36), characterized, - That the outer pin member (34) is formed as a sleeve which receives the at least one inner pin member (36) and in the axial direction of the housing pin (32) slidingly, such that the at least one inner pin member (36) freely in the outer Pin member (34) slidably and at both ends of the outer pin member (34) is telescopically movable out, - That the spring means (33) on the core (14) facing away from the end of the outer and at least one inner pin part (34,36) of the housing pin (32), such that in the predetermined basic rotational position of the core (14) of the at least one inner pin member (36) protrudes toward the receiving space (16) opposite the outer pin member (34) and is movable away from the receiving space (16) independently of the outer pin member (34) against the pressure of the spring means (33). Lock cylinder according to claim 1, characterized in that the housing (12) and the core (14) each have a plurality of housing or core pins (32,30) provided receiving bores (24,28) and that at least one of the housing pins (32) an outer pin member (34) and at least one inner pin member (36). Locking cylinder according to one of claims 1 or 2, characterized in that the spring device (33) has a helical spring which tapers conically at the end facing the housing pin (32) and for abutment against the at least one inner pin part (36) partially in the outer Pen part (34) protrudes. Lock cylinder according to claim 1 or 2, characterized in that the spring means (33) is formed of an outer coil spring and at least one inner coil spring, which are arranged substantially coaxially to each other, wherein the at least one inner coil spring on the at least one inner pin member (36 ) and the outer coil spring rests against the outer pin part (34). Lock cylinder according to claim 4, characterized in that the at least one inner coil spring has a different spring stiffness from the outer coil spring, wherein preferably the spring stiffness of the inner spring is less than the spring stiffness of the outer spring. Lock cylinder according to one of claims 1 to 5, characterized in that the at least one inner pin part (36) and the outer pin part (34) have the same length. Lock cylinder according to one of claims 4 to 6, characterized in that the at least one inner helical spring protrudes in the direction of the receiving space (26) relative to the outer helical spring and has an outer diameter adapted to the outer pin part (34), such that the at least one inner coil spring at least partially from the outer pin member (34) is receivable. Lock cylinder according to one of claims 1 to 7, characterized in that the inner pin part (36) is a pin or a sleeve. Lock cylinder according to one of claims 1 to 8, characterized by two inner pin parts (36), which consist of an inner sleeve and an inner pin, wherein the inner pin is freely movable in the inner sleeve and telescopically movable out at both ends of the inner sleeve. Lock cylinder according to claim 9, characterized in that the spring means (33) on the outer pin member (34), the inner sleeve and the inner pin rests, such that in the predetermined basic rotational position of the core (14) of the inner pin relative to the inner sleeve and the inner sleeve opposite the outer pin member (34) projecting towards the receiving space and each independently against the pressure of the spring means (33) in the direction of the receiving space (16) are movable away. Lock cylinder according to claim 10, characterized in that the spring device (33) consists of three substantially coaxially arranged coil springs, wherein in each case a helical spring bears against the outer pin part (34), the inner sleeve and the inner pin. Lock cylinder according to one of claims 4 to 11, characterized in that two adjacent coil springs each have opposite slopes. Lock cylinder according to one of claims 1 to 12, characterized in that on the spring means (33) a conically shaped lid is arranged, at least partially in the outer pin member (34) or in the outer pin member (34) and the inner sleeve for abutment Spring device (33) projects into the housing pin, wherein the lid preferably at least partially into the spring device (33) for guiding the cover or at least partially surrounds the spring device (33). Locking cylinder according to one of claims 1 to 13, characterized in that the core pin (30) consists of an outer core pin part, which is designed as a sleeve, and at least one inner core pin part, wherein the outer core pin part receives the inner core pin part and in the axial direction of the core pin (30) sliding leads. Lock cylinder according to claim 14, characterized in that the diameter of the outer core pin part to the diameter of the outer pin part (34) of the housing pin (32) and / or the diameter of the at least one core pin part to the diameter of the inner pin part (36) of the housing pin (32 ) is adjusted.

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