EP1719861A2 - Cylinder lock for an electronic lock system - Google Patents

Abstract

The cylinder lock (52) has an interior (10) and an exterior (12) actuation shafts and a closing element (14) arranged between them. The closing element is connected to a rotary case (16) around the axis of rotation of actuation shafts (10, 12). The actuation shafts have a cavity (48) and a coupling element (32) which is torque proof inserted and axially adjustable in the case. The coupling element can be moved by an electric motor (56) between three different positions such as position I, position A, and position K.

Description

The invention relates to a lock cylinder for an electronic locking system with an inner and an outer actuating shaft and a closing element arranged therebetween.

Such lock cylinders are known from the prior art. To operate such lock cylinder, the inner actuating shaft is regularly connected to an inner door knob or an inner door handle, whereas the outer actuating shaft is coupled to an outer door knob or an outer door handle. In order to transmit a rotational movement of the inner or outer door knob or door handle upon proof of a corresponding entitlement to the likewise rotatable closing element, it is necessary to produce a producible depending on the operating state and also releasable rotatable connection between the respective actuating shaft and the closing element can.

An object of the invention is to realize said, depending on the operating condition or releasable rotationally fixed connection between the respective actuating shaft and the closing element in the simplest possible way, at the same time the largest possible number of operating conditions, depending on the desired authorization for a particular application , should be producible.

• in der ersten Stellung zur drehfesten Kopplung des Schließelements mit der inneren Betätigungswelle zum Teil im Hohlraum der inneren Betätigungswelle und zum Teil in der Hülse,
• in der zweiten Stellung zur drehfesten Kopplung des Schließelements mit der äußeren Betätigungswelle zum Teil im Hohlraum der äußeren Betätigungswelle und zum Teil in der Hülse, und
• in der dritten Stellung zur Entkopplung zwischen Hülse und innerer sowie äußerer Betätigungswelle vollständig innerhalb der Hülse

befindet.According to the invention this object is solved by the features of claim 1 and in particular by
that the closing element is firmly connected to a sleeve rotatable about the axis of rotation of the actuating shafts,
in that the actuating shafts each have a cavity at least at their ends facing the sleeve,
that a coupling element rotatably and axially displaceably mounted in the sleeve and for non-rotatable coupling with the actuating shafts partially inserted into the cavities, and
that the coupling element by means of an electric motor between three different positions is movable, wherein it is

• in the first position for the rotationally fixed coupling of the closing element with the inner actuating shaft partly in the cavity of the inner actuating shaft and partly in the sleeve,
• in the second position for the rotationally fixed coupling of the closing element with the outer actuating shaft partly in the cavity of the outer actuating shaft and partly in the sleeve, and
• in the third position for decoupling between sleeve and inner and outer actuating shaft completely within the sleeve

located.

According to the invention can thus be adjusted in a simple manner by a suitable axial displacement of the coupling element, three different operating states of the lock cylinder. In the first position (hereinafter position "I") the inner actuating shaft is non-rotatably coupled to the closing element, so that an operation of an inner door knob or door handle can lead to a rotation of the closing element and thus to a door opening. The outer actuating shaft is not coupled in the position I with the closing element and can be freely rotated accordingly.

When, in the second position (hereinafter position "A"), the outer actuating shaft is non-rotatably coupled to the closing element, actuation of an outer door knob or door handle can correspondingly result in rotation of the closing element and thus opening of the door. In position A, the inner actuating shaft is then freely rotatable.

In the third position (hereinafter position "K") is the coupling element completely within the sleeve connected to the closing element, so that there is neither a coupling with the inner actuating shaft nor a coupling with the outer actuating shaft. Inner and outer actuation shaft with the doorknobs or door handles coupled thereto are consequently both freely rotatable in position K, since none of the shafts is in engagement with the coupling element.

If in the context of this application of a freely rotatable actuating shaft is mentioned, this basically means that the respective freely rotatable actuating shaft is not in engagement with the coupling element, so that accordingly there is no rotationally fixed coupling between the actuating shaft and the closing element. However, it may be useful in certain applications to connect one of the two actuating shafts in a different manner than via the coupling element rotationally fixed to the closing element, so that over the respective actuating shaft regardless of the axial position of the coupling element always an actuation of the closing element is possible. This is desirable, for example, if it is always to be possible to open the lock cylinder via an inner door handle or doorknob.

By the three operating states of the invention I (actuation of the closing element from the inside possible), A (actuation of the closing element from the outside possible) and K (no actuation of the closing element possible, unless there is the latter special mechanical connection without the use of the coupling element) can be realize a large number of different authorization variants:

If an external operation should only be possible with authorization, but from the inside, the coupling element can always be in the position I, whereby it is only displaced into the position A, if from the outside, for example by the insertion of a transponder Key, an appropriate authorization is demonstrated.
If an operation from the outside only with permission, from the inside, however, should not be possible in principle, the coupling element can always be in the position K, where it is only moved to the position A, if from the outside a corresponding entitlement is detected.
If an operation should be possible both from the outside and from inside only with authorization, the coupling element can always be in the position K, where it is only moved to the position A, if from the outside a corresponding permission is detected and only then is moved to the position I, if from the inside a corresponding authorization is proved.

The proof of an authorization inside and outside can be done depending on the application, for example, that - as already mentioned - a transponder key is inserted from the inside or outside in the lock cylinder or even in that a transponder close enough to an inner or outside door knob is moved up. The two variants mentioned can be on the inside and the outside Combine with each other, in particular, it is possible to open from the outside with a transponder key and on the inside with a doorknob or even provide both inside and outside each door knobs.

The above explanations show that a plurality of different operating variants can be realized with a lock cylinder according to the invention, without any changes having to be made to the lock cylinder for this purpose. Rather, all operating variants can be implemented by a respective desired electronic control of the coupling element in the field.

It is preferred if the cross section of the coupling element corresponds to the free inner cross section of the sleeve and cavities of the actuating shafts. If, in this case, the cross-section of the coupling element is not exactly circular and the free inner cross-sections of sleeve and cavities are at least substantially complementary thereto, a comparatively large contact surface between coupling element, sleeve and cavities results, so that an efficient and stable force transmission between the Closing element and the respective operating shaft is possible.
Specifically, it is advantageous if the coupling element has a substantially circular cross-section with at least one outwardly projecting emphasis.

It is particularly preferred if the coupling element has three highlights which are distributed unevenly over the circumference of the coupling element, wherein in particular two adjacent highlights have an angular distance of 72 ° to each other and the third emphasis to the other two emphasis an angular distance of each 144 °. In this case, then the sleeve may have three recesses complementary to the emphasis, wherein the cavity of at least one actuating shaft has five recesses complementary to the emphasis, which are each distributed uniformly over the inner circumference of the cavity, which is useful, for example, if the corresponding Actuating shaft can be acted upon via a rotatable knob. In this embodiment, it is then ensured that whenever an emphasis of the coupling element is aligned with a complementary recess of the sleeve, automatically always the other two emphasis of the coupling element are aligned with corresponding recesses of the sleeve, so that the coupling element in the sleeve introduced and thus rotatably coupled with her can. It is advantageous in this embodiment, the fact that regardless of the angular position between the coupling element and sleeve, the coupling element or a doorknob coupled thereto must be turned only a maximum of a little less than 72 ° until it engages between the coupling element and sleeve. This simplifies the operation of the lock cylinder according to the invention via a doorknob considerably, since, for example, in Providence only highlighting the coupling element and a complementary recess in the sleeve a Knaufdrehung of up to 360 ° would be necessary to achieve the desired locking.

However, the cavity of one or both actuating shafts may also have only three recesses complementary to the reliefs, which are distributed over the circumference of the cavity in the same way as the highlights of the coupling element. This is useful, for example, when the corresponding actuating shaft is acted upon by a key. This then has the consequence that the coupling element only in a single relative angular position to the cavity of the respective Actuating shaft can be inserted in this for the purpose of a rotationally fixed coupling. In this way it can be ensured that, for example, whenever the key is vertically aligned and can be removed from the lock cylinder, the closing element is in a position in which it extends from the sleeve connected to him vertically downwards. Thus, an actuated via the closing element latch with removed key is inevitably always in a defined position and not in an undesirable intermediate position.

In principle, however, it is possible, depending on the application, to provide coupling element and sleeve with an arbitrarily low or arbitrarily high number of highlighting or recesses. Mandatory is only that in a certain angular position between the coupling element and sleeve mutual locking can take place.

It when the coupling element is rotatably mounted on a push rod, which is provided at its end remote from the coupling element with a thread, in particular an external thread, which is in operative connection with a loadable by the electric motor threaded element, in particular an internally threaded sleeve is particularly advantageous. The push rod can be moved in this case by a rotation of the applied by the electric motor threaded member in the direction of its longitudinal axis depending on the direction of rotation of the threaded member in opposite directions, wherein the longitudinal axis of the push rod can coincide with the longitudinal axis of the coupling element. Of course, it is ensured by suitable measures that the push rod can not rotate with the threaded element. Together with the displacement of the push rod can then also be an axial displacement of the coupling element, since this rotatable is mounted on the push rod. The axial movement of the coupling element does not necessarily have to be done completely simultaneously with the movement of the push rod, but it is possible, not only rotatable, but also axially displaceable to store the coupling element within certain limits on the push rod. In this case, it makes sense if the coupling element is biased on the push rod by means of a spring in a middle, neutral axial position, from which the coupling element against the spring force in both axial directions is displaceable. This arrangement is particularly useful when the coupling element is movable into its cavity only in a certain relative angular position to the respective actuating shaft, since then the push rod on actuation of the threaded element can then already be introduced into the cavity when coupling element and cavity not are aligned with each other for mutual engagement. In this case, then the coupling element is located under tension of said spring at the push rod already in the cavity at the front side of the actuating shaft. Upon rotation of the actuating shaft by a key, doorknob or door handle then changes the relative position between the actuating shaft and coupling element to actuating shaft and coupling element with respect to their relative angular position to each other are aligned so that the coupling element can be moved into the cavity of the actuating shaft. This moving in of the coupling element in the cavity is triggered by said spring. During this movement, the spring causes a compressive force on the coupling element in one actuating shaft and a tensile force on the other actuating shaft. The said principle is explained in more detail in the description of the figures.

In the latter embodiment, it is particularly preferred if the coupling element is designed in two parts in the form of an inner hollow cylinder and an outer hollow cylinder, wherein the outer hollow cylinder is rotatable about the inner hollow cylinder and axially fixed to this and the spring acts on the inner hollow cylinder. In this way it is avoided that a rotational movement between the spring and the coupling element or between the spring and the hollow cylinder of the coupling element occurs, which could lead to a disadvantageous way to a release of the spring fixing or even to an undesirable abrasion of material. The outer hollow cylinder has in the said embodiment preferably on the already mentioned emphasis, which are suitable for engagement in complementary recesses of the cavities of the actuating shafts, to establish an operative connection between the coupling element and the cavity of the respective actuating shaft. This embodiment will be explained in more detail in the context of the description of the figures.

It is advantageous if the push rod extends centrally through the inner actuating shaft, since in this case the motor for actuating the push rod on the inside of a door can be arranged within a door knob, so that no manipulation of the outside of the door is possible.

In order to determine the respective axial position of the push rod or the coupling element at any time and process in the electronics of the lock cylinder, the electric motor acting on the push rod can be designed as a stepping motor. In this case, the number of steps carried out by the electric motor which can be determined electronically without further ado, is then proportional to the axial position of the push rod or of the coupling element.

Alternatively or additionally, sensors for detecting the axial position of the coupling element or the push rod can also be provided in the lock cylinder according to the invention, which then transmit corresponding signals to the electronics of the lock cylinder.

Finally, it is also advantageous if the push rod has a central cable feedthrough. Since the push rod is preferably arranged rotationally fixed to a door knob coupled to an actuating shaft, it can be ensured that the cable leadthrough does not rotate relative to this during actuation of the door knob, so that the lines laid in the cable leadthrough and which are provided in the door knob Lead electronics, no torsional stresses are exposed. For the electronic coupling of the door side provided with said door knob with the other door side, then, for example in the region of the end of the push rod facing away from the door knob, e.g. Provide sliding contacts.

Further advantageous embodiments of the invention are described in the subclaims.

Fig. 1

eine dreidimensionale Ansicht von Teilen des erfindungsgemäßen Schließzylinders in einer Explosionsdarstellung aus einer ersten Perspektive,

Fig. 2

eine Darstellung gemäß Fig. 1 aus einer zweiten Perspektive,

Fig. 3

einen Schnitt durch einen erfindungsgemäßen Schließzylinder, welcher die Komponenten gemäß den Fig. 1 und 2 aufweist,

Fig. 4

eine vergrößerte Darstellung des in Fig. 3 entsprechend gekennzeichneten Bereichs in Stellung K,

Fig. 5

eine Darstellung gemäß Fig. 4 in einer Übergangsstellung,

Fig. 6

eine Darstellung gemäß den Fig. 4 und 5 in Stellung A, und

Fig. 7

eine Darstellung gemäß den Fig. 4 bis 6 in Stellung I.

The invention will be explained below with reference to an embodiment with reference to the figures; in these show:

Fig. 1

3 is a three-dimensional view of parts of the lock cylinder according to the invention in an exploded view from a first perspective,

Fig. 2

2 shows a representation from FIG. 2 from a second perspective,

Fig. 3

a section through a lock cylinder according to the invention, which comprises the components according to FIGS. 1 and 2,

Fig. 4

an enlarged view of the marked in Fig. 3 corresponding area in position K,

Fig. 5

a representation according to FIG. 4 in a transitional position,

Fig. 6

a representation according to FIGS. 4 and 5 in position A, and

Fig. 7

a representation according to FIGS. 4 to 6 in position I.

The exploded view of FIGS. 1 and 2 shows an inner actuating shaft 10, to which an outer actuating shaft 12 is axially aligned, wherein between the two actuating shafts 10, 12, a closing element 14 is located, which is connected to a about the axis of rotation of the actuating shafts 10, 12 rotatable sleeve 16 is firmly connected. Fig. 1 shows the said components in an external view, whereas Fig. 2 represents a corresponding view from the inside.

The actuating shafts 10, 12 are each formed in two parts. The outer actuating shaft consists of a first element 18, to which axially in the direction of the sleeve 16, a ring member 20 connects, which is rotatably coupled to the element 18 via form-locking elements 22. In the element 18, a key channel 24 is formed, so that the element 18 is rotatable together with the ring member 20 when inserted into the keyway 24 key.

Correspondingly, the inner actuating shaft 10 consists of an element 26 which is non-rotatably coupled to a ring member 28 facing the sleeve 16. The element 26 is suitable for coupling to a door knob, not shown in FIGS. 1 and 2, via which it can then ultimately be rotated.
Alternatively, at least one of the actuating shafts 10, 12 can also be formed in one piece.
In any case, it makes sense to the actuating shafts 10, 12 form so that they can be extended by means of suitable, not shown spacers, so as to provide lock cylinder with different lengths in a simple way.

Through the inner actuating shaft 10 extends through a rotatable push rod 30, on which in the sleeve 16 facing region axially slidably a coupling element 32 is mounted. The push rod 30 has a central cable feedthrough 50, so that it is possible to electrically connect through the push rod 30 through a door inside with a door outside.
The coupling element 32 consists of an inner hollow cylinder 34 and an outer hollow cylinder 36, wherein the outer hollow cylinder 36 is rotatably mounted on the inner hollow cylinder 34, but in the axial direction can not be moved on the inner hollow cylinder 34. Such an axial displacement can be avoided for example by the provision of snap rings on the inner hollow cylinder 34.

The inner hollow cylinder 34 with the hollow cylinder 36 axially fixed thereto is held in a neutral position by a compression spring 38 from which the inner hollow cylinder 34 with the outer hollow cylinder 36 attached thereto can be displaced against the spring force on the push rod 30 in both axial directions.

While the inner hollow cylinder 34 is provided for supporting the outer hollow cylinder 36 at its outer periphery with a smooth cylindrical surface, the outer hollow cylinder has a total of three radially outwardly projecting emphasis 40, 42, which are distributed unevenly over the circumference of the outer hollow cylinder 36. The two highlights 40 have an angular distance of 72 ° to each other, whereas the third emphasis 42 to the other two emphasis 40 has an angular distance of 144 ° each.

Complementary to the protrusions 40, 42 of the coupling element 32, three recesses 44 are provided in the sleeve 16, which extend axially through the entire length of the sleeve 16 so that the aligned with the recesses 44 coupling element 32 are axially displaced in the sleeve 16 can. From Fig. 2 it is readily apparent that in the sleeve 16 at least partially inserted coupling element 32, this relative to the sleeve 16 can not be rotated because between the emphasis 40, 42 and the recesses 44 is a form fit, which is such Prevents twisting.

Like the sleeve 16, the ring element 20 of the outer actuating shaft 12 also has three recesses or cavities 46 on its end facing the sleeve 16, which recesses are also arranged complementary to the raised areas 42 of the coupling element 32. (See Fig. 2.)

The ring member 28 of the inner actuating shaft 10, however, has on its end facing the sleeve 16 a total of five recesses or cavities 48, which uniformly over the circumference of the ring member 28 are distributed, so that each two adjacent recesses 48 to each other at an angular distance of 72 °.

All the recesses 44, 46 and 48 are formed so that they are suitable for the positive reception of a highlighting 40, 42 of the coupling element 32, wherein the emphasis 40, 42 in principle axially in the recesses 44, 46, 48 are displaceable.

Already when viewing FIGS. 1 and 2, it becomes clear that, for example, when the coupling element 32 is located with one region in the sleeve 16 and with the other region in the ring element 28, a rotationally fixed coupling between the inner actuating shaft 10 and the sleeve 16 and thus the closure member 14 exists. In an analogous manner results in a rotationally fixed coupling between outer actuating shaft 12 and sleeve 16 when the coupling element 32 is located with an area in the sleeve 16 and the other area in the ring member 20 of the outer actuating shaft 12.

Fig. 3 shows a section through a lock cylinder 52, in which the apparent from Figs. 1 and 2 components are used. Accordingly, rotatably mounted in the lock cylinder 52, the inner actuating shaft 10, the outer actuating shaft 12 and the coupling element 32 and the sleeve 16 with integrally formed closing element 14. While the outer actuating shaft 12 is equipped in the manner already explained with a key channel 24, the inner Actuating shaft 10 at its end facing away from the sleeve 16 a knob 54, in which the push rod 30 extends into it. The knob 54 is an electric motor 56 which can act on a threaded member which cooperates with an external thread 58 of the push rod 30, so that by rotation of the electric motor an axial displacement of the push rod 30 can be effected.

4 shows an enlarged view of that portion of FIG. 3 which comprises the mutually facing ends of the inner and outer actuating shafts 10, 12 and the coupling element 32. In the position K shown in FIG. 4, the coupling element 32 is exclusively in engagement with the recesses 44 of the sleeve 16, that is, neither in engagement with the recesses 48 of the inner actuating shaft 10 nor with the recesses 46 of the outer actuating shaft 12. In this position are inner and outer actuating shafts 10, 12 freely rotatable, without causing the closing element 14 can be moved.

Now, if the push rod 30 by means of the electric motor 56 from the position K shown in FIG. 4 is axially displaced in the direction of the outer actuating shaft 12 and in such a displacement, the recesses 46 of the outer actuating shaft 12 is not random in an aligned position to the highlighting 40th , 42 of the coupling element 32, is initially an operating condition shown in FIG. 5 a. According to Fig. 5, the push rod 30 extends into the present in the outer actuating shaft 12 central cavity 60, wherein the coupling element 32 and existing on the outer hollow cylinder 36 highlighting 40, 42 still bear against the front end of the outer actuating shaft 12 and accordingly not in the recesses 46 of the outer actuating shaft 12 engage. This state is possible because the coupling element 32 is axially displaceable against the force of the compression spring 38 mounted on the push rod 30, so that starting from the position shown in FIG. 4 under compression of the compression spring 38 and under axial displacement of the coupling element 32 relative to the push rod 30 can give an operating position shown in FIG. 5.

Now, starting from the position shown in FIG. 5, the outer actuating shaft 12 is rotated via a key inserted into the keyway 24, the sleeve 16 facing end face of the outer actuating shaft 12 slides along the facing surfaces of the emphasis 40, 42 along. In this case, only the outer actuating shaft 12 rotates, but not the inner hollow cylinder 34 and outer hollow cylinder 36 of the coupling element 32, since these components are at least largely rotationally fixed by the recesses 44 of the sleeve 16. The rotation of the outer actuating shaft is continued until the emphasis 40, 42 of the coupling element 32 are aligned with the recesses 46 of the outer actuating shaft 12, so that in this state under relaxation of the compression spring 38, a displacement of the coupling element 32 into the cavity 60 takes place , wherein a positive engagement of the emphasis 40, 42 results in the cavities 46 of the outer actuating shaft 12. This state corresponds to the position A, which is shown in Fig. 6. In this position, the outer actuating shaft 12 is rotatably coupled via the coupling element 32 with the sleeve 16 and the closing element 14 formed thereon, so that a further rotation of the key in a desired manner also leads to a pivoting movement of the closing element 14.

The connection of the coupling element 32 with the inner actuating shaft 10 proceeds in an analogous manner, here, as already mentioned, a maximum rotation of the doorknob 54 by 72 ° is necessary until the emphasis 40, 42 of the coupling element 32 in each aligned recesses 48 of the inner actuating shaft 10 engage. Of the the state corresponding to the position I, in which the coupling element 32 and the inner actuating shaft 10 are rotatably connected to each other, is shown in Fig. 7.

LIST OF REFERENCE NUMBERS

10

inner actuating shaft

12

outer actuating shaft

14

closing element

16

shell

18

element

20

ring element

22

Form-fitting elements

24

keyway

26

element

28

ring element

30

pushrod

32

coupling element

34

Interior hollow cylinder

36

Outer hollow cylinder

38

compression spring

40

highlighting

42

emphasis

44

recesses

46

recesses

48

recesses

50

Grommet

52

lock cylinder

54

knob

56

electric motor

58

external thread

60

cavity

Claims (10)

Locking cylinder (52) for an electronic locking system with an inner (10) and an outer (12) actuating shaft and a closing element (14) arranged therebetween,
characterized,
in that the closing element (14) is firmly connected to a sleeve (16) rotatable about the axis of rotation of the actuating shafts (10, 12),
in that the actuating shafts (10, 12) each have a cavity (46, 48, 60) at least at their ends facing the sleeve (16),
that a coupling element (32) rotatably and axially displaceably mounted in the sleeve (16) and for non-rotatable coupling with the actuating shafts (10, 12) partially in their cavities (46, 48, 60) can be inserted, and
in that the coupling element (32) can be moved between three different positions by means of an electric motor (56), wherein it is in the first position for the non-rotatable coupling of the closing element (14) with the inner actuating shaft (10) partly in the cavity (48) of the inner actuating shaft (10) and partly in the sleeve (16) (position "I"), - In the second position for the rotationally fixed coupling of the closing element (14) with the outer actuating shaft (12) partly in the cavity (46) of the outer actuating shaft (12) and partly in the sleeve (16) (position "A"), and - In the third position for decoupling between sleeve (16) and inner and outer actuating shaft (10, 12) completely within the sleeve (16) (position "K") located. Lock cylinder according to claim 1,
characterized,
that the cross section of the coupling element (32), the free internal cross-section of the sleeve (16) and cavities (46, 48) of the actuating shafts (10, 12) corresponds and / or
in that the coupling element (32) has a substantially circular cross section with at least one outwardly projecting emphasis (40, 42). Lock cylinder according to claim 2,
characterized,
in that the coupling element (32) has three highlights (40, 42) distributed unevenly over the circumference of the coupling element (32), in particular two adjacent highlights (40) having an angular spacing of 72 ° from one another and the third highlighting (42) to the other two emphasis (40) has an angular distance of 144 °, wherein preferably the sleeve (16) has three to the emphasis (40, 42) complementary recesses (44). Lock cylinder according to claim 3,
characterized,
that the cavity of one or both actuation shafts (10) each have five recesses complementary to the prominences (40, 42) (48), which are distributed uniformly distributed over the inner circumference of the cavities and / or
in that the cavity of one or both actuation shafts (12) has in each case three recesses (46) complementary to the elevations (40, 42). Locking cylinder according to one of the preceding claims,
characterized,
in that the coupling element (32) is rotatably mounted on a push rod (30) which is provided at its end remote from the coupling element (32) with a thread, in particular an external thread (58), which is operatively connected to one of the electric motor (56) Threaded element, in particular an internally threaded sleeve is, in particular, the coupling element (32) is mounted axially displaceably on the push rod (30). Lock cylinder according to claim 5,
characterized,
in that the coupling element (32) on the push rod (30) is biased by means of a spring (38) into a middle, neutral axial position, from which the coupling element (32) is displaceable against the spring force in both axial directions. Locking cylinder according to one of the preceding claims,
characterized,
in that the coupling element (32) is designed in two parts in the form of an inner hollow cylinder (34) and an outer hollow cylinder (36), the outer hollow cylinder (36) being designed to be rotatable and axially fixed about the inner hollow cylinder (34) and the spring (38) Inner hollow cylinder (34) acted upon. Lock cylinder according to one of claims 5 to 7,
characterized,
that the push rod (30) extends centrally through the inner actuating shaft (10). Locking cylinder according to one of the preceding claims,
characterized,
that the electric motor (56) is designed as a stepping motor and / or
in that sensors are provided for detecting the axial position of the coupling element (32). Locking cylinder according to one of claims 5 to 9,
characterized,
that the push rod (30) has a central grommet (50).

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