DE102011102159B4 - Modular lock cylinder - Google Patents

Abstract

Modular lock cylinder, in particular electronic lock cylinder, with at least two cylinder modules (11, 13), which can be coupled to one another via at least one axial connecting element (37, 43), and with at least one intermediate module (23, 23 '), for a length adjustment of the lock cylinder axially between the cylinder modules (11, 13) is arranged, wherein the cylinder modules (11, 13) and the intermediate module (23, 23 ') comprises a hollow cylindrical core receiving portion (15, 25) and a subsequent thereto flange portion (17, 27), characterized in that the intermediate module (23, 23 ') has a slot (29) and is so flexible that the slot (29) is temporarily expandable to the intermediate module (23, 23') relative to the longitudinal axis (L) of Lock cylinder can be placed in the radial direction along the widened slot (29) on the axial connecting element (37).

Description

The invention relates to a modular lock cylinder, in particular electronic lock cylinder, with at least two cylinder modules which are coupled to each other via at least one axial connecting element, and with at least one intermediate module which is arranged for a length adjustment of the lock cylinder axially between the cylinder modules, wherein the cylinder modules and the Intermediate module comprise a hollow cylindrical core receiving portion and a subsequent thereto flange portion.

A lock cylinder is inserted in the assembled state in a mortise lock of a door and fixed there by means of a forend screw. By virtue of an associated identification means (e.g., key or access code), the lock cylinder allows a locking or unlocking operation of the mortise lock. For this purpose, a rotary actuation of a cylinder core or a shaft of the lock cylinder is usually transmitted via a coupling to a cam, which cooperates with a locking mechanism of the mortise lock.

On the one hand, the door leaf and fitting thickness varies and on the other hand, the lock cylinder for safety reasons and for aesthetic reasons should not protrude from the door or the door fitting, the manufacturer and the dealer lock cylinders have different length hold in stock, especially with different internal dimensions and external dimensions. Especially in connection with locking systems, which include a plurality of lock cylinders, at the time of factory assembly of the lock cylinder is often not final, which length of the lock cylinder should ultimately own. Particularly disadvantageous is the varying length of an electronic lock cylinder, as this typically has a complex structure due to the electrical drive and control devices contained therein, so that it is desirable to have to hold only a single type of pre-assembled assembly.

Therefore, in such applications, it is advantageous if the lock cylinder allows a subsequent definition or adjustment of its overall length, in particular by packaging at the dealer and in any case at least before insertion into the associated mortise lock at the destination. There are therefore known modular lock cylinders in which at least two cylinder modules are connected via an axially, i. along the longitudinal axis of the lock cylinder extending connecting element are coupled together. Along the longitudinal axis between the cylinder modules at least one intermediate module is arranged to effect an individual length adjustment.

For example, the cylinder modules may be two end modules and a center module to form a double cylinder, or the cylinder modules may include only one end module and a center module to form a half cylinder. The cylinder modules and the intermediate module typically each have a hollow cylindrical core receiving portion for receiving therein a rotatable cylinder core, a drive shaft and / or a portion of a clutch. Furthermore, the cylinder modules and the intermediate module each have a subsequent to the core receiving portion in the radial direction flange portion which usually houses the housing pins of pin tumblers in a mechanical lock cylinder. The outer dimensions of the cylinder modules and the intermediate module can correspond in particular to the outer dimensions of a profile cylinder according to DIN 18252, in order to enable a simple equipment or retrofitting of the most common in many countries form of a mortise lock.

The document DE 10 2006 001 267 B3 is based on a modular lock cylinder, in which the axial connecting element for coupling the cylinder modules is formed by a connecting web, which is inserted into a respective axial bore in the flange portion of the cylinder modules, wherein the respective intermediate module has an axial bore in the flange portion, through which Connecting web is passed. In order to facilitate a simple and cost-effective assembly of a modular double-cylinder electronic lock cylinder, this document describes the arrangement of one or more intermediate modules between a center module and two end modules. The center module comprises a hollow cylindrical core receiving portion and a flange portion with a bore for the forend screw. The modules of a respective half of the lock cylinder are coupled together via a common axial connecting screw in the flange portion of the modules.

While such a construction of a modular lock cylinder has been proven in practice, a further problem is that the final assembly for the layman can be difficult and therefore also prone to errors, especially when substantially replacing the lock cylinder in the axial direction to replace an intermediate module must become. This problem arises in particular with electronic locking cylinders, which typically have a complex structure. Furthermore, there must be a sufficient number of different intermediate modules be held, which are expensive components in the known modular locking cylinders.

An object of the invention is therefore to provide a modular lock cylinder, which can be pre-assembled at the factory and at low cost allows easy subsequent adjustment of the overall length.

This object is achieved by a modular lock cylinder with the features of claim 1, and in particular by the fact that the intermediate module has a slot and is flexible so that the slot is temporarily expandable to the intermediate module along the longitudinal axis of the lock cylinder in the radial direction along to be able to place the expanded slot on the axial connecting element.

The slot may extend along the flange portion of the intermediate module and / or be formed on the hollow cylindrical core receiving portion of the intermediate module, wherein the slot is preferably parallel to the longitudinal axis of the lock cylinder. Incidentally, the external dimensions of the intermediate module can correspond to the external dimensions of a profile cylinder according to DIN 18252. However, by spreading the two separated by the slot parts of the intermediate module, the intermediate module can be temporarily bent. For this purpose, the intermediate module is at least partially sufficiently flexible, i. formed deformable. In this bent state, the axial connecting element can easily pass through the widened slot into a corresponding receptacle of the flange section or into the central opening of the core receiving section. In other words, the intermediate module in the radial direction, that is transverse to the longitudinal axis of the lock cylinder, be placed along the widened slot on the axial connecting element. The axial connecting element can in this case be provided in the respective flange section and / or in the respective core receiving section of the cylinder modules and of the intermediate module. Due to the flexible design of the intermediate module, the intermediate module can be brought back into a rest position after placement, in which the contour of the intermediate module corresponds to the profile contour according to DIN 18252.

An axial "threading" of the connecting element in the corresponding receptacle or in the central opening of the intermediate module is thus not required, so that the preassembled module does not necessarily have to be disassembled in the axial direction. The adaptation of the length of the lock cylinder can therefore be made in a simple and fast way by a dealer, by a fitter at the destination or even by an end customer. However, in the final assembled state of the lock cylinder, the intermediate module can substantially completely fill the gap between the two adjacent cylinder modules (apart from the mandatory recesses, e.g., for the axial connector), resulting in a particularly stable assembly of the final assembled assembly.

Intermediate modules of the type mentioned can have a simple structure and, for example, be manufactured as a low-cost injection molded plastic parts. Thus, a complete set of different intermediate modules can be attached to the respective lock cylinder simply to allow the dealer or the end customer to assemble the lock cylinder as desired. Due to the simple construction of the intermediate modules, the provision of several different length copies is not associated with excessively high costs.

Further developments of the invention are specified in the dependent claims, the description and the accompanying drawings.

The intermediate module can be made of plastic or of metal, for example made of spring steel. A production of plastic, in particular by means of an injection molding process, allows a particularly cost-effective production, whereas a production of metal at higher stability requirements may be advantageous.

According to one embodiment of the invention, the intermediate module is formed spring-back and biased in the direction of a substantially closed state of the slot. In this embodiment, the intermediate module, after it has been plugged onto the axial connecting element, automatically assumes an idle state, in which an accidental sliding of the intermediate module from the module is avoided. This facilitates the assembly.

According to an advantageous embodiment, the slot of the intermediate module extends along the entire flange portion to the central opening of the hollow cylindrical core receiving portion. In this embodiment, the hollow cylindrical core receiving portion of the intermediate module can serve as a hinge due to a sufficiently flexible configuration in order to expand the slot either temporarily.

In this embodiment, the slot may divide the flange portion of the intermediate module, in particular, into two legs. During assembly, the connecting element can radially between the two legs are moved into the core receiving portion of the intermediate module.

In particular, the slot can divide the flange portion into two identical legs.

If, in this embodiment, the intermediate module is formed resiliently, the two legs of the intermediate module can be biased into a rest position in which the legs abut each other, so that said slot is substantially closed.

According to an alternative embodiment, said slot is provided only at the core receiving portion of the intermediate module, in particular at the top of the core receiving portion or at a transition region to the flange portion.

According to another alternative embodiment, said slot is provided on the core receiving portion of the intermediate module (in particular on the upper side), and the slot further extends from the central opening of the hollow cylindrical core receiving portion along a part of the flange portion of the intermediate module. This also makes it possible to form two legs of the intermediate module. Thus, the core receiving portion facing away from the end of the flange portion form a hinge, for example in the manner of a film hinge to expand the slot either temporarily.

In each of the aforementioned embodiments, the intermediate module on at least one axial end face having an engagement device which cooperates with a complementarily designed engagement means on the facing axial end side of the adjacent cylinder module to form a rotation lock for the intermediate module and / or the slot on the flange keep the intermediate module closed. For example, may be provided on an axial end face of the intermediate module, a projection which is designed for a positive engagement with a corresponding recess of a cylinder module. By such engagement means the final assembly can be further facilitated.

According to one embodiment of the invention, the slot divides the flange portion of the intermediate module - as already explained - in two legs, wherein the engagement means of the intermediate module on each of the two legs has an engagement projection which engages in an engagement recess on the facing axial end face of the adjacent cylinder module. In particular, an engagement web can extend in the radial direction on each of the two legs, which can be inserted into a corresponding engagement groove. According to one embodiment, a common engagement groove for the two engagement webs is provided, so that the legs are fixed to each other by engaging in the engagement groove engaging webs and the slot is kept closed. As an alternative or in addition to such radial engagement webs, the engagement device of the intermediate module may have an annular or ring-shaped centering projection on the hollow-cylindrical core-receiving section.

In the aforementioned embodiments, it may further be provided that the slot of the intermediate module can be closed by a latching connection or by means of a separate fixing device, in order to secure the intermediate module against its being removed again after it has been placed on the axial connecting element. In particular, said legs of the intermediate module can be fastened to one another, for example by means of a clip connection or a fixing clip, which is effective on the flange section of the intermediate module.

According to a further embodiment of the invention, the axial connecting element couples the cylinder modules in the axial direction captive with each other. This allows a factory pre-assembly of the module. For a subsequent length adjustment of the lock cylinder, namely, the assembly does not have to be disassembled in the axial direction, but the intermediate modules are placed only in the radial direction on the axial connection element. Thus, a simple and less error-prone assembly of the lock cylinder is possible.

The existing between the captive coupled cylinder modules axial clearance can correspond to the maximum permissible length of the lock cylinder. By such a limited axial play is excluded that a user accidentally uses too many or too long intermediate modules. In this way, therefore, the error rate can be further reduced.

The axial connecting element can be, for example, a connecting web which is inserted axially or from below into the flange section of the cylinder modules. Alternatively or additionally, the axial connecting element - in particular in the case of an electronic lock cylinder - be a rotatable drive shaft.

In particular, the axial connecting element may have a drive shaft of variable length, which through the respective core receiving portion of the cylinder modules and the Intermediate module is guided and the cylinder modules in the axial direction captively coupled with each other. The drive shaft is preferably rotationally actuated manually, wherein the drive shaft is selectively rotatably coupled, for example by means of an electric motor and an associated coupling device with a cam of the lock cylinder to bring the lock cylinder temporarily from a freewheeling state to a driving state, as shown in the documents DE 10 2006 001 265 C5 and DE 10 2006 001 266 C5 is known. The drive shaft may in particular be designed as a telescopic shaft, ie as a split shaft with two axially displaceable, but non-rotatably coupled parts.

Alternatively or in addition to the drive shaft or to a connecting web, the axial connecting element may comprise a connecting screw, which is guided through the respective flange portion of the cylinder modules and the intermediate module to fix the cylinder modules and the intermediate module in the axial direction relative to each other. By means of the connecting screw can be done after insertion of the intermediate module fixing the assembly in the axial direction.

Preferably, both an axial connecting screw and a drive shaft are provided. It can also be provided two connecting screws, which are each screwed from the outside into the module package.

• 1 ist eine Explosionsdarstellung eines modularen Schließzylinders gemäß einer Ausführungsform der Erfindung.
• 2 zeigt den Schließzylinder gemäß 1 in einer Seitenansicht.
• 3 zeigt den Schließzylinder gemäß 2 im endmontierten Zustand ohne Antriebswelle.
• 4 zeigt den Schließzylinder gemäß 3 mit Antriebswelle.
• 5a bis 5d zeigen unterschiedliche Ausführungsformen von Zwischenmodulen in einer jeweiligen Frontansicht.

The invention will now be described by way of example with reference to the drawings.

• 1 is an exploded view of a modular lock cylinder according to an embodiment of the invention.
• 2 shows the lock cylinder according to 1 in a side view.
• 3 shows the lock cylinder according to 2 in final assembled state without drive shaft.
• 4 shows the lock cylinder according to 3 with drive shaft.
• 5a to 5d show different embodiments of intermediate modules in a respective front view.

According to 1 and 2 a modular lock cylinder comprises two end modules 11 and a middle module disposed therebetween 13 , which form a profile cylinder with a profile contour according to DIN 18252 and in each case a hollow cylindrical core receiving portion 15 and a flange portion integrally formed thereon 17 respectively. The central openings 18 the core receiving sections 15 are along a longitudinal axis L of the lock cylinder arranged in alignment with each other and serve to receive a in 1 and 2 not shown axial link, via which the end modules 11 and the center module 13 can be coupled together. As an example of such an axial link will be later with reference to 4 a rotatable drive shaft 37 described. Basically, instead of one could be the core receiving sections 15 coupling drive shaft and the flange sections 17 be provided coupling connecting web. Such a connecting web is for example in the document DE 10 2004 051 163 A1 disclosed.

In the flange section 17 of the center module 13 is a forend screw hole 19 provided by means of which the lock cylinder can be secured in a mortise lock of a door. A locker 21 is rotatable in the assembled state of the lock cylinder in the center module 13 stored.

To the end modules 11 and the center module 13 to assemble a lock cylinder unit with variable length, are intermediate modules 23 . 23 ' provided axially between the end modules 11 and the center module 13 are arranged and thus serve as spacers. By way of example only, in the figures, a between the front end module 11 and the center module 13 arranged, long intermediate module 23 and one between the center module 13 and the rear end module 11 arranged, short intermediate module 23 ' shown. By inserting further intermediate modules or intermediate modules of different lengths, the axial length of the lock cylinder can be adapted exactly to the respective installation situation. The intermediate modules 23 . 23 ' own like the end modules 11 and the center module 13 a profile contour according to DIN 18252 and have respective hollow cylindrical core receiving sections 25 with central openings 28 as well as subsequent flange sections 27 on.

The intermediate modules 23 . 23 ' own in the area of the respective core receiving section 25 on an axial end face 31 a centering approach 24 and at the other axial end side 31 a ring recess 26 for a respective centering ring 40 , The centering approach 24 and the centering ring 40 act with a respective centering recess 41 at the core receiving portion 15 the end modules 11 and the center module 13 together.

By means of two connecting screws 43 can the end modules 11 , the middle module 13 and the intermediate modules 23 . 23 ' be screwed axially against each other. These are in the end modules 11 and in the intermediate modules 23 . 23 ' corresponding axial feedthroughs 44 and in the center module 13 axial threaded holes 45 intended.

To a subsequent insertion of the intermediate modules 23 . 23 ' in a preassembled assembly of modules coupled together 11 . 13 to allow assigns each of the intermediate modules 23 . 23 ' a slot 29 on, which is parallel to the longitudinal axis L of the lock cylinder and in the embodiment shown here in the radial direction along the entire flange portion 27 up to the central opening 28 of the core receiving section 25 , so also by the axial passage 44 through, extends. Through the slot 29 is the flange section 27 of the respective intermediate module 23 . 23 ' in two thighs 30 subdivided, which in the in 1 shown rest position are aligned parallel to each other and rest without gap to each other.

The intermediate modules 23 . 23 ' are made as injection molded plastic parts and therefore in particular on the respective core receiving portion 25 flexible. The two thighs 30 of the respective flange portion 27 Thus, they can be bent apart in a not shown, substantially V-shaped mounting position, wherein the core receiving portion 25 of the intermediate module 23 . 23 ' serves as a hinge. Due to the elastic properties of the plastic material used to make the two legs 30 springing back so that they are biased in the direction of the rest position.

At the two axial ends 31 every intermediate module 23 . 23 ' are axial elevations 34 provided, each through the slot 29 in two engaging webs 33 are divided. The engaging webs 33 are dimensioned such that they form fit in the mounted state of the lock cylinder in engagement grooves 35 engage, which at the inner end face 36 each end module 11 as well as on the two front sides 38 of the center module 13 are provided.

3 shows the lock cylinder in a final assembled state, with the axial connection element omitted for simplicity. The assembly of the lock cylinder takes place in two separate stages:

pre-assembly:

As part of a factory pre-assembly, the end modules 11 and the center module 13 aligned with each other so that the central openings 18 their core reception sections 15 aligned with each other. The cambar 21 will be in the middle module 13 used. An in 4 represented, for example by means of a knob drehbetätigbare drive shaft 37 and a coupling device (not shown) then pass through the openings 18 through put. The drive shaft 37 is composed of several sleeve-like parts and telescopically extendable, ie changeable in length. By circlips 47 can the drive shaft 37 in the end modules 11 axially fixed so that the end modules 11 and the center module 13 through the drive shaft 37 ultimately captively coupled with each other. By means of an electric drive and said coupling device, the drive shaft 37 optionally temporarily with the lock bit 21 rotatably coupled.

Then the two connecting screws 43 from the outside through the axial passages 44 the end modules 11 passed and into the threaded holes 45 of the center module 13 screwed so that a basic length of the preassembled module is made. The pre-assembly is now complete and the pre-assembled lock cylinder can, preferably with the settlement of a set of intermediate modules 23 . 23 ' and connecting screws 43 different lengths, to a specialist dealer or to an end customer.

Final assembly:

The specialist dealer or the end customer determines the desired length of the lock cylinder (inside dimension and outside dimension) on the basis of the mortise lock to be equipped and chooses the number and the length of the intermediate modules to be inserted based thereon 23 . 23 ' and the length of the appropriate connecting screws 43 out. He then replaces the connecting screws if necessary 43 by connecting screws 43 suitable length and inserted in each space between end module 11 and center module 13 an intermediate module 23 . 23 ' radially on the drive shaft 37 and the respective connecting screw 43 on. For this purpose, the user widens the slot 29 of the respective intermediate module 23 . 23 ' on by holding the two thighs 30 of the flange portion 25 spread apart. The contour of the intermediate module 23 . 23 ' Thus, temporarily no longer corresponds to the profile contour according to DIN 18252, but protrudes beyond this profile contour. The respective intermediate module 23 . 23 ' gets along the widened slot 29 on the drive shaft 37 placed. Once the central opening 28 of the intermediate module 23 . 23 ' with the central openings 18 the end modules 11 and the center module 13 Aligns are the spread legs 30 let go, whereupon they spring back to their rest position. In this position, the core receiving section encloses 25 of the intermediate module 23 . 23 ' the drive shaft 37 , and the respective connecting screw 43 is through the axial passage 44 guided. A twisting of the modules 11 . 13 . 23 . 23 ' against each other is due to the double guidance by the Zentrieransätze 24 , Ring recesses 26 , Centering rings 40 and centering recesses 41 on the one hand and through the connecting screws 43 on the other hand excluded, whereby the final assembly of the lock cylinder is much easier.

When subsequently tightening the connecting screws 43 get the engagement webs 33 the intermediate modules 23 . 23 ' into the engagement grooves 35 the end modules 11 and the center module 13 and thereby increase the stability of the assembly. Finally, the end modules 11 be provided on the outside with a drill protection, not shown.

A particular advantage is that the final assembly is relatively easy to perform and requires neither special tools nor special expertise. The susceptibility to errors is mainly reduced by the fact that no axial disassembly of the pre-assembled lock cylinder is required. The intermediate modules to be provided by the manufacturer or specialist dealer 23 . 23 ' for length adjustment are as injection molded parts relatively inexpensive to produce.

5a to 5d show still various possible embodiments of an intermediate module 23 . 23 ' at rest in a respective front view. Same elements as in 1 to 4 are indicated by the same reference numerals.

The embodiment according to 5a corresponds to that according to 1 to 4 . d .H. The slot 29 extends along the entire flange portion 27 up to the central opening 28 of the core receiving section 25 of the intermediate module 23 . 23 ' and divides the flange portion 27 in two thighs 30 ,

In the embodiment according to 5b is the slot 29 only at the top of the hollow cylindrical core receiving portion 25 of the intermediate module 23 . 23 ' intended. The two halves of the core receiving portion formed thereby 25 can thus be spread apart temporarily to the intermediate module 23 . 23 ' in the radial direction along the widened slot 29 on the drive shaft 37 ( 1 to 4 ) to be able to touch down. In this embodiment, it is assumed that in the final assembly, the connecting screws 43 suitable length only after placing the intermediate module 23 . 23 ' in the respective axial passage 44 be introduced. The optional engagement bar 33 serves here only as additional anti-rotation.

The embodiment according to 5c corresponds to that according to 5b , However, the slot is 29 here at a transition region between the core receiving section 25 and the flange portion 27 intended. The hollow cylindrical core receiving section 25 can thus be bent up like a hook temporarily.

In the embodiment according to 5d is the slot 29 - similar to 5a along the middle plane of the intermediate module 23 . 23 ' intended. However, the slot extends 29 starting from the central opening 28 only along an upper part of the flange portion 27 of the intermediate module 23 . 23 ' , In addition, the slot 29 also on the hollow cylindrical core receiving section 25 provided (either at the top as shown or laterally as in 5c ). Thus, here are two legs 30 formed, which can be temporarily spread apart, wherein the lower, the core receiving portion 25 opposite end of the flange portion 27 forms a hinge.

LIST OF REFERENCE NUMBERS

11

end module

13

middle module

15

Core receiving portion

17

flange

18

central opening

19

Stulpschraubenbohrung

21

Cam

23, 23 '

intermediate module

24

Spigot

25

Core receiving portion

26

ring recess

27

flange

28

central opening

29

slot

30

leg

31 33

axial end side engaging ridge

34

axial elevation

35

engagement

36

inner front side

37

drive shaft

38

front

40

centering

41

centering

43

connecting screw

44

axial passage

45

threaded hole

47

circlip

L

longitudinal axis

Claims (14)

Modular lock cylinder, in particular electronic lock cylinder, with at least two cylinder modules (11, 13), which can be coupled to one another via at least one axial connecting element (37, 43), and with at least one intermediate module (23, 23 '), for a length adjustment of the lock cylinder axially between the cylinder modules (11, 13) is arranged, wherein the cylinder modules (11, 13) and the intermediate module (23, 23 ') comprises a hollow cylindrical core receiving portion (15, 25) and a subsequent thereto flange portion (17, 27), characterized in that the intermediate module (23, 23 ') has a slot (29) and is so flexible that the slot (29) is temporarily expandable to the intermediate module (23, 23') relative to the longitudinal axis (L) of Lock cylinder can be placed in the radial direction along the widened slot (29) on the axial connecting element (37). Lock cylinder after Claim 1 , wherein the intermediate module (23, 23 ') made of plastic or metal, in particular spring plate, is made. Lock cylinder after Claim 1 or 2 wherein the slot (29) extends parallel to the longitudinal axis (L) of the lock cylinder and / or extends in the radial direction with respect to the longitudinal axis (L) of the lock cylinder. Lock cylinder according to one of the preceding claims, wherein the intermediate module (23, 23 ') is formed spring-back. Lock cylinder after one of the Claims 1 to 4 wherein the slot (29) extends along the flange portion (27) to the core receiving portion (25) of the intermediate module (23, 23 '), the slot (29) forming the flange portion (27) of the intermediate module (23, 23') preferably divided into two legs (30). Lock cylinder after one of the Claims 1 to 4 wherein the slot (29) is provided only on the core receiving portion (25) of the intermediate module (23, 23 '). Lock cylinder after one of the Claims 1 to 4 wherein the slit (29) is provided on the core receiving portion (25) of the intermediate module (23, 23 ') and additionally extends along a part of the flange portion (27) of the intermediate module (23, 23'), the core accommodating portion (25 ) facing away from the end of the flange portion (27) forms a hinge. Locking cylinder according to one of the preceding claims, wherein the intermediate module (23, 23 ') on at least one axial end face (31) has an engagement means (24, 34) which with a complementarily designed for this engagement means (35, 41) on the facing axial end face (36, 38) of the adjacent cylinder module (11, 13) cooperates to form a rotation lock for the intermediate module (23, 23 ') and / or to the slot (29) on the flange portion (27) of the intermediate module (23, 23' ) to keep closed. Lock cylinder after Claim 8 in that the slot (29) subdivides the intermediate module (23, 23 ') into two legs (30), wherein the engaging means (34) of the intermediate module at each of the two legs (30) has an engagement projection (24, 33) which in an engagement recess (35, 41) on the facing axial end face (36, 38) of the adjacent cylinder module (11, 13) engages. Lock cylinder according to one of the preceding claims, wherein the slot (29) can be closed by a latching connection or by means of a separate fixing device. Lock cylinder according to one of the preceding claims, wherein the axial connecting element (37, 43), the cylinder modules (11, 13) coupled in the axial direction captive with each other. Lock cylinder after Claim 11 , wherein the between the captive coupled to each other cylinder modules (11, 13) existing axial clearance corresponds to the maximum permissible length of the lock cylinder. Locking cylinder according to one of the preceding claims, wherein the axial connecting element (37) has a drive shaft of variable length, which is guided by the respective core receiving portion (15, 25) of the cylinder modules (11, 13) and the intermediate module (23, 23 ') and the the cylinder modules (11, 13) in the axial direction captively coupled with each other. Locking cylinder according to one of the preceding claims, wherein the axial connecting element comprises a connecting screw (43) which is guided through the respective flange portion (17, 27) of the cylinder modules (11, 13) and the intermediate module (23, 23 ') to the cylinder modules and to fix the intermediate module in the axial direction relative to each other.

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