EP2940232A1 - Coupling device - Google Patents

Abstract

The invention relates to a coupling device for a door unlocking mechanism, comprising a rotatable drive element (11); a rotatable output member (15); a coupling element (21) which is displaceably mounted on the drive element (11) between a decoupling position and a coupling position, wherein the coupling element (21) decouples the drive element (11) from the output element (15) in the decoupling position and the drive element in the coupling position (11) rotatably coupled to the output member (15); at least one blocking element (51) displaceable between a release position and a blocking position; and an electrically controllable actuating device (71) for displacing the blocking element (51). Between the blocking element (51) and the coupling element (21), a movable guide element (31) is provided, which is biased in the direction of a coupling position and has a guide track for the coupling element (21). In the release position, the blocking element (51) releases the guide element (31) for avoidance into an evasive position and locks the guide element (31) in the engaged position in the blocking position.

Description

The invention relates to a coupling device for a Türentriegelungsmechanismus, with a rotatable drive element; a rotatable output member; a coupling element which is mounted displaceably on the drive element between a decoupling position and a coupling position, wherein the coupling element in the decoupling position decouples the drive element from the output element and rotatably coupled in the coupling position, the drive element with the output element; at least one blocking element displaceable between a release position and a blocking position; and an electrically controllable adjusting device for (direct or indirect) displacement of the blocking element.

Such a coupling device serves to couple a door operating device, for example a door handle or a door knob, optionally with a door unlocking mechanism in order to be able to actuate it from the outside of the door. This coupling can be done, for example, after an authorized user has been authenticated. For example, a control device assigned to the coupling device can check a code transmitted wirelessly or entered via a keyboard and, in the case of a positive test result, control the coupling device accordingly.

In order to bring about the desired coupling, a coupling element is ultimately displaced from a decoupling position into a coupling position. In the decoupling position, a drive element of the coupling device is freely rotatable relative to an output element. In the coupling position, the coupling element causes a rotationally effective Coupling of the drive element with the output element. In order to set the coupling element in the coupling position and / or to keep in the coupling position, it is known to move a blocking element by means of an electrically controllable actuating device from a release position into a locked position.

From the DE 696 30 795 T2 a coupling device is known in which by means of an electric motor, a coupling pin is moved in the parting plane between a rotatable drive element and a rotatable output element, so that the output element follows together with the coupling pin a rotational movement of the drive element.

From the EP 1 576 246 B1 a similar coupling device is known in which for coupling a coupling pin is offset and in the case of rotational movement of a drive element in the engaged state of the coupling pin is moved away from the associated drive means.

From the DE 103 20 873 A1 a coupling device is known in which in the case of a rotational movement of a drive element in the disengaged state, a coupling element evades in the axial direction, wherein in the coupled state, a blocking element blocks the coupling element against the axial evasive movement, so that the rotationally fixedly connected to an output element coupling element of the rotational movement of the drive element follows.

It is an object of the invention to provide an improved coupling device of the type mentioned, which allows a quick switching to a coupling state and has a high protection against manipulation and low energy consumption.

This object is achieved by a coupling device having the features of claim 1, and in particular by the fact that the coupling device a movable guide element provided between the blocking element and the coupling element, which is biased in the direction of a coupling position and has a guide track for the coupling element, the blocking element releasing the guide element in the release position for avoidance into an evasive position and in the blocking position the guide element in the Engaging position locks.

In the coupling device according to the invention, a guide element is arranged between the blocking element and the coupling element, which has a guideway for guiding the coupling element and fixing the position of the coupling element (decoupling position or coupling position). The guide element is biased towards a Einkuppelposition; however, it can retreat into an evasive position. In this disengaged state of the coupling device, although the coupling element rotates together with the drive element; However, the coupling element is out of engagement with the driven element, since the guide element recedes when acted upon by the coupling element and the coupling element is therefore not brought into engagement with the driven element.

If, on the other hand, the blocking element is in the blocking position and thereby blocks the guide element from retreating into the evasive position, then in the case of a rotational movement of the drive element, the coupling element inevitably moves along the guide track of the locked guide element and is thereby brought into engagement with the driven element to bring about a desired coupling of the output element with the drive element. This engagement state of the clutch device is temporarily set, for example, when an associated control device has successfully performed an authentication and the setting device controls to temporarily set the blocking element in the blocking position for an impending rotational actuation of the drive element.

In the coupling device according to the invention, the blocking element thus does not serve to block the coupling element rotating together with the drive element. But the coupling element cooperates with a movable guide element. This guide element is locked by means of the locking element optionally in the Einkuppelposition.

An advantage of the coupling device according to the invention is that the displacement of the coupling element is effected indirectly in the coupling position, namely as a result of a rotary actuation of the drive member by the authorized user. Thus, no electrical energy for the actuator is required to move the coupling element.

The coupling element may for example be biased by means of a biasing device in the direction of the guide rail of the guide element, or it may cooperate by forced operation (in particular slide guide) with the guide track of the guide element. Thus, it is reliably prevented that the position of the coupling element is influenced without authorization from the outside, for example, by collisions or the application of magnetic fields. This results in a high security against manipulation.

The guide element can be made stable and correspondingly solid, in order to support the coupling element along a wide range of rotation angle of the drive element. However, the adjusting device only has to displace the blocking element along a short travel path, and the blocking element can have a comparatively small mass in order to block the movement path of the guiding element in its blocking position. Thus, by the relatively slight displacement of the light blocking element, a rapid switching of the coupling device into a coupling state is possible, as soon as an associated one of the two Control device accordingly controls the setting device due to a successful authentication.

Another advantage of the coupling device according to the invention is that different directions of movement of the movably mounted components of the coupling device can be realized by the guide element arranged between the blocking element and the coupling element. These different directions of movement may at least partially transverse (preferably perpendicular) to each other. As a result, on the one hand, the security against manipulation is increased even further, since a shock given from the outside in a certain direction to the coupling device can manipulatively displace only one of the components which form the described chain of action of blocking element, guide element and coupling element. On the other hand, it is prevented by the interposition of the guide element that driving forces are transmitted from the rotatable drive element or the coupling element entrained thereby via the blocking element to the adjusting device. Thus, a simple bearing (e.g., linear bearing) of the guide member and the locking member is possible, and the actuator must merely be designed to displace the locking member, which, as explained, may be made comparatively light.

The rotatable output element of the coupling device according to the invention must not support any forces from the coupling element in the decoupled state.

According to an advantageous embodiment, the coupling element is biased by means of a first biasing device in the direction of the decoupling, wherein the guide element is biased by means of a second biasing means in the direction of Einkuppelposition, wherein the biasing action of the first biasing means is greater than the biasing action of the second biasing means. By the first biasing means causes the coupling element always acts on the guideway of the guide element. By the second biasing means causes the guide element basically assumes the engaged position. Since the biasing action of the first biasing means is greater than the biasing action of the second biasing means, the guide member can be deflected by appropriate cooperation between the coupling element and the guide rail of the guide element in the avoidance position, if the blocking element is in the release position.

As an alternative to the use of two such pretensioning devices, a single pretensioning device can be provided (on the part of the coupling element or the guide element), wherein the coupling element can cooperate with the guideway, as already explained, via a positive guide (for example slotted guide with engagement of a guide spigot in a guide groove).

According to a further advantageous embodiment, the coupling element is mounted displaceably on the rotatable drive element in a linear (i.e., rectilinear) manner, in particular exclusively linearly displaceable. This results in a particularly simple storage of the coupling element. In particular, the coupling element can be mounted displaceably in the radial direction with respect to the axis of rotation of the drive element.

Furthermore, it is preferred that the coupling element engages in a circumferential coupling opening of the output element when the coupling element is in the coupling position. As a result, a simple shaping of the coupling element and a reliable positive engagement in the output element of the coupling device are achieved. The coupling element preferably comprises a coupling pin.

According to a further advantageous embodiment, in a first rotation angle range of the drive element, the guide element interacts with the coupling element via the guide track in such a way that the guide element is forced into the escape position by the coupling element in the decoupling position, if the blocking element assumes the release position, and that the guide element the coupling element is placed in the coupling position, if the blocking element locks the guide element in the coupling position. Thus, the guideway of the guide member and the coupling element are tuned to that in the disengaged state of the coupling device, the guide member is moved to its alternate position when the drive member is rotatably actuated and the coupling element rotates together with the drive element moves along the guide track of the guide member. In the engaged state, however, ie, when the blocking element blocks the guide element in the coupling position, the rotating coupling element is offset from the guide track of the guide element in the coupling position, in which the coupling element couples the drive element with the output element of the coupling device. Such an interaction between the coupling element and the guide track of the guide element can be provided in particular in a limited rotational angle range of the drive element starting from a rest position.

In order to produce such an operative connection, the guide track of the guide element is preferably designed as a control ramp, which is inclined relative to an (imaginary) circular path about the axis of rotation of the drive element.

Furthermore, it is advantageous if, in a second rotation angle range of the drive element, which can in particular directly adjoin the said first rotation angle range, the guide element cooperates via the guide track with the coupling element such that the guide element of the coupling element located in the decoupling position in the avoidance position is held, if the locking element continues to occupy the release position, and that the guide element holds the coupling element in the coupling position, if the locking element continues to lock the guide element in the coupling position. As a result, in the coupled state of the coupling device, the coupling element can be held by the guide track of the guide element in the coupling position even with further rotary actuation of the drive element. In the disengaged state of the coupling device, however, the guide element remains deflected even with further rotational actuation of the drive element.

Such an interaction between the guideway of the guide element and the coupling element can be produced in a simple manner in that the guideway is formed as a circular path whose center lies on the axis of rotation of the drive element.

The guide element is preferably mounted linearly movable, for example on a housing of the coupling device. This results in a particularly simple storage of the guide element. In particular, the guide element can be mounted linearly displaceable in the radial direction with respect to the axis of rotation of the drive element. Alternatively, however, the guide element with respect to the axis of rotation of the drive element may also be mounted linearly displaceable in the axial direction, i. the explained deflection of the guide element takes place in this case along the axis of rotation of the drive element.

As regards the blocking element, this may be adapted to obstruct a movement path of the guide element in its blocking position, in order thereby to block the guide element in the coupling-in position. Preferably, the blocking element is displaceable along a direction which extends transversely (in particular perpendicularly) to the direction of movement of the guide element. As a result, as described, improved protection against tampering is achieved.

The electrically controllable adjusting device can directly offset the blocking element (or the plurality of blocking elements), in particular by the electrically controllable actuating device acting directly on the respective blocking element.

Alternatively, according to a particularly advantageous embodiment, the blocking element can be displaced along an offset direction between the release position and the blocking position, wherein the electrically controllable adjusting device adjusts a blocking element along a direction of adjustment, which is different from the offset direction, and wherein the blocking element and the blocking element via support portions and guide bevels cooperate in order to convert a (directed in the sense of engagement) actuating movement of the blocking element in a (directed in the sense of obstruction of the guide member) blocking movement of the locking element. However, in this embodiment, the blocking element and the blocking element via the support sections and guide slopes preferably also cooperate such that a (in the sense of releasing the guide member directed) backward movement of the locking element is not converted into a (in the sense of disengagement directed) rearward movement of the blocking element. For this purpose, the support portions of the blocking element and the blocking element may be aligned parallel to each other and orthogonal to the direction of movement of either the blocking element or the blocking element, while the guide slopes of the blocking element and the blocking element can each be aligned obliquely to the direction of movement of the blocking element or of the blocking element.

By such indirect displacement of the blocking element by means of the adjusting device, a further change of direction is thus realized along the chain of action between the adjusting device and the coupling element, whereby the manipulation security is increased even further. Furthermore, several blocking elements can thereby be displaced simultaneously (in particular in different directions of displacement), namely by the blocking element acting on a plurality of blocking elements. In addition, the transmission of actuating forces and / or biasing forces from the direction of the drive member or the guide member can be prevented on the actuator.

In the aforementioned embodiment, it is preferred if the blocking element is spring-biased variable in length in order to record in the event of blockage of the blocking element in its release position, an adjusting movement of the adjusting device and to store as adjusting. For example, the blocking element may have a first portion associated with the adjusting device and a second portion associated with the blocking element, which are movable relative to one another along said adjusting direction and are biased in opposite directions by means of a pretensioning device which serves as an energy accumulator. If the blocking element is blocked in its release position, for example because the guide element is in its avoidance position, while the actuating device is actuated for engagement, the blocking element formed in this way can be temporarily compressed and finally put the blocking element in the blocking position by the stored adjusting force, as soon as the blocking of the blocking element is lifted (ie as soon as the guide element is in the engaged position again). Thus, therefore, a malfunction is avoided.

Preferably, the blocking element is biased in the direction of its release position. In this case, the blocking element is thus offset against its bias by means of the adjusting device in the blocking position, wherein the biasing effect However, a return movement of the locking element is supported in its release position. By such a bias of the locking element (in particular a pair of oppositely biased locking elements) can optionally be effected in an end position a latching of the aforementioned blocking element. In particular, a frictional holding of the blocking element in an end position can be effected by the bias of the respective locking element, which corresponds to the locking position of the respective locking element. For example, the blocking element can be held by a clamping fit between two locking elements which are biased towards each other. Alternatively or additionally, by such a bias of the locking element (or a pair of oppositely biased locking elements) can be prevented that the aforementioned blocking element does not unintentionally in the trajectory of the respective locking element goes (for example, by gravity, vibration or other external influences).

As regards the electrically controllable adjusting device, this preferably comprises an electric motor with a threaded spindle. As a result, a linear drive with high reduction can be realized in a simple manner and in a compact design. However, basically any other type of geared motor is suitable. As an alternative to an electric motor, the adjusting device may comprise, for example, an electromagnet.

Fig. 1

zeigt eine Kupplungsvorrichtung in einem ausgekuppelten Zustand in einer Querschnittsdarstellung, wobei ein Antriebselement eine Mittelstellung einnimmt.

Fig. 2

zeigt die Kupplungsvorrichtung in dem ausgekuppelten Zustand, wobei das Antriebselement gegenüber der Mittelstellung verdreht ist.

Fig. 3

zeigt die Kupplungsvorrichtung in einem Einkuppelzustand, wobei das Antriebselement wiederum die Mittelstellung einnimmt.

Fig. 4

zeigt die Kupplungsvorrichtung in einem eingekuppelten Zustand, wobei das Antriebselement gegenüber der Mittelstellung verdreht ist.

Fig. 5

zeigt Teile der Kupplungsvorrichtung in einer Längsschnittdarstellung.

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

Fig. 1

shows a coupling device in a disengaged state in a cross-sectional view, wherein a drive element occupies a central position.

Fig. 2

shows the coupling device in the disengaged state, wherein the drive element is rotated relative to the center position.

Fig. 3

shows the coupling device in a Einkuppelzustand, wherein the drive element in turn assumes the middle position.

Fig. 4

shows the coupling device in an engaged state, wherein the drive element is rotated relative to the center position.

Fig. 5

shows parts of the coupling device in a longitudinal sectional view.

The in the Fig. 1 to 5 shown coupling device is due to a suitable authentication, a drive element 11, which is rotated for example via a door handle or doorknob (not shown) and a square pin 13 by a user, optionally with an output element 15 to couple, which for example via a further square pin 17 with a door unlocking mechanism (not shown). The drive element 11 and the output element 15 are independently rotatable about a common axis of rotation A.

On the drive element 11, a coupling pin 21 is mounted linearly displaceable. The coupling pin 21 is between a decoupling position ( Fig. 1 to 3 ) and a coupling position ( Fig. 4 ), wherein the coupling pin 21 engages in the coupling position in a coupling opening 23 provided on the outer circumference of the output element 15. The coupling pin 21 is fixed by means of a on the drive element 11 Biasing device 25 (eg compression spring) in the direction of Entkoppelposition according to Fig. 1 to 3 biased.

The drive element 11 and the output element 15 are received in a housing 27 of the coupling device.

The coupling device shown further comprises a guide member 31 which is mounted linearly movable in the housing 27 along a direction of movement B, with respect to the axis of rotation A in the radial direction. The guide element 31 is by means of another biasing means 33 (eg further compression spring) in the direction of a Einkuppelposition ( Fig. 1, 3 and 4 ). However, the guide element 31 can move in the direction of an evasive position (FIG. Fig. 2 ) are pushed back. The guide element 31 has a guide track 35 for guiding the coupling pin 21. The guide track 35 comprises a central ramp section 37 which is substantially V-shaped with respect to a circular path about the axis of rotation A, and two circular path sections 39 adjoining the ramp section 37 on both sides with respect to the axis of rotation A are designed as circular paths (ie, the center is located on the axis of rotation A). The guide element 31 also has two legs 41, which protrude from the two ends of the guideway 35 and each have a locking recess 43.

The coupling device shown further comprises two locking elements 51, which are mounted on the housing 27 along a displacement direction C linearly displaceable and between a respective release position ( Fig. 1 and 2 ) and a respective blocking position ( 3 and 4 ) can be moved. The blocking elements 51 are biased by means of a respective biasing means 53 (eg further compression spring) in opposite directions in the direction of the respective release position. In the release position ( Fig. 1 and 2 ) gives the respective blocking element 51, the guide element 31 for evading into the avoidance position ( Fig. 2 ) free. In the locked position ( 3 and 4 ) locks the respective locking element 51, the guide member 31 in the Einkuppelposition by the respective locking element 51 engages in the associated locking recess 43 of the guide member 31.

The two blocking elements 51 is associated with a common blocking element 61, which is mounted on the housing 27 along a direction of adjustment D linearly movable. The blocking element 61 and the two blocking elements 51 act on plane supporting surfaces and inclined guide surfaces, which are respectively provided on the longitudinal sides of the blocking element 61 and on the back of the locking elements 51, together such that an adjusting movement of the blocking element 61 along the direction of adjustment D while is converted by deflection in a blocking movement of the locking elements 51 along the offset direction C, ie due to the mutual oblique guide surfaces are in the case of an upward movement of the blocking element 61 (based on the representation in the Fig. 1 to 4 ) the two locking elements 51 against their respective bias to the outside in the direction of the respective locking recess 43 of the guide member 31 urged. On the other hand, a respective rearward movement of the blocking elements 51 (eg due to the action of the respective pretensioning device 53) does not result in a backward movement of the blocking element 61, since the planar supporting surfaces on the rear side of the blocking elements 51 abut against the lateral support surfaces of the blocking element 61 and thus have no deflecting effect the blocking element 61 is exerted ( 3 and 4 ).

Finally, the coupling device shown also includes an electrically controllable adjusting device 71 for indirectly displacing the locking elements 51, namely by the blocking element 61 is adjusted and offset in the manner explained by deflection, the two locking elements 51 to the outside. The adjusting device 71 comprises for this purpose in the embodiment shown here, an electric motor 73 with a threaded spindle 75, which cooperates via a thread with the rotationally fixed blocking element 61.

The operation of the coupling device shown will be explained below.

In the disengaged state of the coupling device, the guide element 31 is due to the application of the associated biasing means 33 while in the Einkuppelposition when the drive element 11 - as in Fig. 1 shown - assumes a middle position in which the coupling pin 21 engages in the ramp portion 37 of the guideway 35.

However, if in the disengaged state, that is, when the locking members 51 are retracted from the locking recesses 43 of the guide member 31, the drive member 11 is rotated, along the guide track 35 along sliding coupling pin 21 of the drive member 11 urges the guide member 31 back into the in Fig. 2 shown alternative position, wherein the coupling pin 21 maintains its position on the drive element 11 (decoupling). The biasing action of the coupling pin 21 associated biasing means 25 is chosen to be larger than the biasing action of the guide element 31 associated biasing means 33. Accordingly, the rotational movement of the drive member 11 is not transmitted to the output member 15.

During the illustrated rotation of the drive element 11 (transition from the center position according to Fig. 1 in the twisted position according to Fig. 2 ), the coupling pin 21 slides in a first rotational angle range of the drive element 11 along the ramp portion 37 of the guideway 35, whereby the backward pushing of the guide member 31 is brought into the evasive position. In a subsequent second rotational angle range of the drive element 11, the coupling pin 21 located in the decoupling position moves along the adjacent one Circular path section 39 of the guideway 35 and thereby holds the guide member 31 continues in the in Fig. 2 shown alternative position.

In the engaged state of the coupling device, however, the locking elements 51 engage in the respective locking recess 43 of the guide member 31 and thus lock it in the Einkuppelposition, since the locking elements 51 thereby obstruct the path of movement of the guide member 31, as in Fig. 3 is shown.

If now the drive element 11, starting from the center position according to Fig. 3 is rotated again, the guide member 31 is no longer retreat, but it remains in the Einkuppelposition. This results in that the coupling pin 21 is offset in the drive element 11 against its bias from the Entkoppelposition in the coupling position, ie with respect to the axis of rotation A radially inwardly. For this purpose, the free end of the coupling pin 21 is pushed back by the guide ramp 35 of the locked guide member 31. As a result, the coupling pin 21 initially engages in the coupling opening 23 of the output element 15, so that the output element 15 is now coupled to the drive element 11. In the further course of the rotational movement of the drive element 11, the drive element 11 thus drives the coupled output element 15 to a rotational movement, as in Fig. 4 is shown.

Specifically, in a first rotational angle range of the drive element 11, the coupling pin 21 slides along the ramp section 37 of the guide track 35 and is thereby displaced radially inwardly relative to the rotational axis A. In a subsequent second rotational angle range of the drive element 11, the free end of the coupling pin 21 moves along the adjacent circular path portion 39 of the guide track 35 of the locked guide member 31, so that the coupling pin 21 remains in the coupling position.

To the coupling device from the disengaged state according to Fig. 1 in the Einkuppelzustand according to Fig. 3 to transfer, the actuator 71 must adjust the blocking element 61 only by a minimum offset path, whereby the two locking elements 51 are offset against their respective bias by a correspondingly small displacement path. This is based on a comparison of Fig. 1 and 3 easily seen. This actuating operation is triggered by appropriate control of the adjusting device 71 by means of an associated control device (not shown).

Since the two blocking elements 51 only have to be offset by a minimum displacement path, the coupling device can be transferred from the disengaged state into the engaged state very quickly.

Another advantage of the coupling device shown is that the offset direction C of the locking elements 51 is perpendicular to the direction of movement B of the guide member 31 and in addition also perpendicular to the adjustment direction D of the blocking element 61. As a result, a high protection against manipulation is ensured, since at most individual components, but not the entire chain of action can be influenced by the blocking element 61 to the coupling pin 21 by impacts on the coupling device. For regardless of the impact direction, at least one component is only movably mounted in an orthogonal direction.

According to an optional embodiment, the blocking element 61 may additionally be designed to be spring-biased variable in length, for example, in that the blocking element 61 is designed in two parts with a compression spring acting therebetween. As a result, when the actuating device 71 is activated in the sense of engagement, the guide element 31 can move in the evasive position according to FIG Fig. 2 is and the guide member 31 thereby blocks the locking elements 51 against engagement in the locking recesses 43, the blocking element 61 store an actuating operation by means of the adjusting device 71 temporarily as adjusting and deliver to the locking elements 51 as soon as the locking elements 51 are released again for a displacement in their respective locking position.

LIST OF REFERENCE NUMBERS

11

driving element

13

Square spindle

15

output element

17

Square spindle

21

coupling pin

23

coupling opening

25

biasing means

27

casing

31

guide element

33

biasing means

35

guideway

37

ramp section

39

Circular path section

41

leg

43

locking recess

51

blocking element

53

biasing means

61

blocking element

71

setting device

73

electric motor

75

screw

A

axis of rotation

B

Direction of movement of the guide element

C

Offset direction of the locking elements

D

Positioning direction of the blocking element

Claims (14)

Coupling device for a door unlocking mechanism, comprising: - a rotatable drive element (11); a rotatable output element (15); - A coupling element (21) which is displaceably mounted on the drive element (11) between a Entkoppelposition and a coupling position, wherein the coupling element (21) in the Entkoppelposition the drive element (11) from the output element (15) and decoupled in the coupling position Drive element (11) rotatably coupled to the output member (15); - At least one blocking element (51) which is displaceable between a release position and a locking position; and - An electrically controllable adjusting device (71) for displacing the locking element (51); marked
by a movable guide element (31) provided between the blocking element (51) and the coupling element (21), which is prestressed in the direction of a coupling-in position and has a guide track (35) for the coupling element (21),
wherein the blocking element (51) in the release position releases the guide element (31) for evading into an evasive position and, in the blocking position, blocks the guide element (31) in the engaged position. Coupling device according to claim 1, wherein the coupling element (21) by means of a first biasing means (25) is biased in the direction of the decoupling, wherein the guide element (31) by means of a second biasing means (33) is biased towards the Einkuppelposition, and wherein the biasing effect of first biasing means (25) is greater than the biasing action of the second biasing means (33). Coupling device according to claim 1 or 2, wherein the coupling element (21) is mounted linearly displaceable on the drive element (11). Coupling device according to one of the preceding claims, wherein the coupling element (21) has a coupling pin which engages in a coupling opening (23) of the output element (15) when the coupling element (21) is in the coupling position. Coupling device according to one of the preceding claims, wherein in a first rotation angle range of the drive element (11), the guide element (31) via the guide track (35) with the coupling element (21) cooperates such that - The guide element (31) is urged by the coupling element (21) located in the decoupling position in the avoidance position, if the blocking element (51) occupies the release position, and - The guide element (31), the coupling element (21) offset in the coupling position, if the blocking element (51) locks the guide element (31) in the coupling position. Coupling device according to claim 5, wherein the guide track (35) in the first rotational angle range of the drive element (11) a guide ramp (37) which is inclined with respect to a circular path about the axis of rotation (A) of the drive element (11). Coupling device according to claim 5 or 6, wherein in a second rotation angle range of the drive element (11), the guide element (31) via the guide track (35) with the coupling element (21) cooperates such that - The guide member (31) is held by the located in the decoupling coupling element (21) in the evasive position, if the locking element (51) continues to occupy the release position, and - The guide member (31) holds the coupling element (21) in the coupling position, if the locking element (51) continues to lock the guide element (31) in the coupling position. Coupling device according to claim 7, wherein the guide track (35) in the second rotational angle range of the drive element (11) is formed as a circular path about the axis of rotation (A) of the drive element (11). Coupling device according to one of the preceding claims, wherein the guide element (31) is mounted linearly movable. Coupling device according to one of the preceding claims, wherein the blocking element (51) in the blocking position blocks a movement path of the guide element (31). Coupling device according to one of the preceding claims, wherein the blocking element (51) along a displacement direction (C) between the release position and the locking position is displaceable, wherein adjusting means (71) adjusts a blocking element (61) along a direction of adjustment (D), the is different from the offset direction (C), wherein the blocking element (61) and the locking element (51) via support portions and guide slopes cooperate to convert an actuating movement of the blocking element (61) in a blocking movement of the locking element (51), but not a backward movement of the Locking elements (51) in a rearward movement of the blocking element (61) to convert. Coupling device according to claim 11, wherein the blocking element (61) is spring-biased variable in length, in the event of blockage of the blocking element (51) in its release position receive an adjusting movement of the blocking element (61) and store as adjusting. Coupling device according to one of the preceding claims, wherein the blocking element (51) is biased in the direction of its release position. Coupling device according to one of the preceding claims, wherein the adjusting device (71) comprises an electric motor (73) with a threaded spindle (75).

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