CN114207235A - Locking device - Google Patents

Abstract

The invention relates to a locking device (10) for a closing element (20), in particular a door, having a locking element (3), which locking element (3) can be rotated back and forth about an activation axis (B) between a locking position and an unlocking position, wherein the locking element (3) can be rotated about an emergency unlocking axis (N) for emergency unlocking from the locking position into the emergency unlocking position, the emergency unlocking axis (N) and the activation axis (B) being arranged at an angle to one another. The invention also relates to a closure element (20) having such a locking device (10) and to a method for emergency unlocking of the locking device (10).

Description

Locking device

The invention relates to a locking device for a closing element, in particular a door, having a locking element which can be rotated back and forth between a locking position and an unlocking position about an activation axis.

Locking devices of this type are used in a wide variety of fields and can be used for all possible closing elements, for example for doors, windows or hatches. The respective closing element can be used to close a specific area of, for example, a machine room, a wind turbine, a banking room, a walk-in closet, a vault or a server room and protect them from unauthorized access.

For this purpose, the closing element can be moved back and forth between a closed position, in which access to the respective region is permitted, and an open position, in which access is prevented.

In order to lock the closure element in the closed position so that it cannot be opened, the closure element is usually provided with one or more alternative locking means. These locking devices usually have a locking element which can be rotated back and forth about an activation axis between a locked position and an unlocked position. In the locking position, the locking element engages behind or in the fixing frame of the closing element, for example in the manner of a safety belt latch (safe latch), so that the closing element is fixed relative to the fixing frame. In the case of a door, the locking element engages behind or in the door frame, for example.

Although such locking devices have proven their worth in the past, in many cases it is not possible to easily rotate the locking element from the locked position back to the unlocked position. This is because, for example, the fastening means usually provided in the form of a lock need to be unlocked first in order to move the locking element accordingly.

A problem therefore arises if the locks can only be accessed from the outside of the closure element, but not from the inside. For example, if a person is accidentally locked in a room and the locking element can no longer be rotated about the activation axis from the locked position to the unlocked position, the person can no longer leave the room without assistance, but rather relies on outside assistance. Sometimes, if the person is not helped properly, it may even be dangerous to life and limbs.

Against this background, it is an object of the invention to provide a locking device by means of which this risk can be reduced.

The object of the invention is achieved by a locking device having the features defined in claim 1. Advantageous developments can be gathered from the dependent claims.

Since in the design the locking element can be pivoted about the emergency unlocking shaft from the locking position to the emergency unlocking position for the purpose of emergency unlocking and the emergency unlocking shaft and the activation shaft are arranged at an angle to one another, it is advantageous that the locking element can be pivoted by a movement about the emergency unlocking shaft into a position in which the closing element can be opened even when no rotational movement about the activation shaft is possible. The angled arrangement has: the locking element can be automatically transferred into the emergency unlocking position by applying a force, in particular a compressive force, to the closing element. It is therefore not necessary to actively pivot the locking element into the emergency unlocking position, but instead the closing element can be opened intuitively, for example in an emergency.

With regard to the angular arrangement, it has proven to be advantageous if the emergency release shaft and the activation shaft enclose an angle of 45 to 135 degrees, preferably 70 to 110 degrees, particularly preferably 80 to 100 degrees, very particularly preferably 85 to 105 degrees, in particular 90 degrees. The closer the angle is to 90 degrees, the simpler it is to transfer the locking element to an emergency unlocking position in which the closing element can be opened. The locking element can thus be transferred in the simplest manner into the emergency unlocking position if the activation axis and the emergency unlocking axis are perpendicular to one another. The activation axis and the emergency release axis may intersect, but they may also be arranged inclined with respect to each other. The above-mentioned angles can be defined even when they are arranged inclined with respect to each other. In each case, what is relevant is the angle of intersection when the axes move in parallel.

With regard to the activation of the locking element, it has proven to be advantageous if the locking element can be rotated about the activation axis by means of the activation element. The locking element can be moved back and forth in a simple manner, in particular manually, between the locking position and the unlocking position by means of the activation element. The activation element may be arranged outside the closing element and configured as a lever, a catch or a knob, for example. The activation element may be rotationally coupled with the locking element. This makes it possible for a rotational movement of the activation element to result in a corresponding rotational movement of the locking element. Typically, the locking element must be pivoted 90 degrees from the locked position until the unlocked position is reached. In the case of a corresponding direct rotary coupling, the activation element must also be moved correspondingly in the same angular range. However, other angular ranges are possible.

Furthermore, it has further proved advantageous if the locking device has an emergency activation element. The latter can be coupled with the locking element in the activated position, so that the locking element can be rotated back and forth between the locked position and the unlocked position about the activation axis by the emergency activation element. The emergency activation element may be arranged on a side of the closure element opposite the activation element. The emergency activation element is arranged in particular inside the closing element. The emergency activation element may have an operating region configured as a lever, a catch or a knob, for example, through which the emergency activation element can be manually moved. If the rotation of the locking element about the activation axis is not prevented, the locking element can be rotated by emergency activation in a very similar way to the activation of the activation element. The emergency activation element can be coupled to the locking element, in particular to the activation element, in the activated position. When the activation element or the emergency activation element is rotated about the activation axis, the respective other elements may also be rotated jointly about the activation axis. If the movement of the locking element about the activation axis is prevented, the movement of the emergency activation element and the activation element about the activation axis is also prevented.

Furthermore, it has proven to be advantageous if the emergency activating element is coupled to the locking element in the activated position such that the latter cannot be moved relative to the emergency activating element. These elements are coupled in particular in such a way that the emergency activation element prevents the locking element from entering the emergency unlocking position about the emergency unlocking axis from the locking position. By means of the emergency unlocking option, the closure element can be opened in a dangerous situation. However, this option should not be misused for normal opening of the closure element, since otherwise it cannot be ensured that the closure element can be safely locked and unauthorized opening can be prevented. If the emergency activation element is in the activated position, the closure element can only be opened if the locking element is transferred into the unlocked position. Since the emergency unlocking element can advantageously only be contacted and activated from the inside of the closure element, it is not possible to override (override) the coupling of the emergency activation element and the locking element from the outside in order to pivot the locking element about the emergency unlocking axis and open the closure element.

In order to be able to open the closing element, in particular in the case of an emergency, the emergency activating element can be transferred into a release position in which the locking element can be moved relative to the emergency activating element. In the release position, the coupling between the emergency activation member and the locking member may be overridden, such that the locking member may pivot about the emergency release shaft. The emergency activation element can be pivoted about an emergency activation axis into a release position, viewed structurally, and the emergency activation axis can be arranged parallel to the emergency unlocking axis. The emergency activation element can thus assume a dual function. In the active position it can rotate the locking element about the activation axis for the purpose of normally unlocking said locking element, and in the release position it can ensure that the locking element can be moved into the emergency unlocking position.

In this respect, it has proven to be advantageous if the emergency activating element is coupled with the locking element in the activated position and is not coupled with the locking element in the released position. In the release position, the locking element can move freely and independently with respect to the emergency activation element.

In order to make the opening of the closing element as intuitive as possible, the emergency activating element can be pressed from the activating position into the releasing position. By applying a corresponding compressive force to the emergency activating element, the latter can first be moved into the release position and then the closing element can be opened in one step by continuing to apply the compressive force. Continued pressure upon release ensures that the locking element is pivoted into the emergency unlocking position by movement of the closure element.

It has furthermore proved advantageous if the locking element can be pivoted about the emergency unlocking axis from the locked position into the emergency unlocking position only when the emergency activating element is in the release position. If the emergency activation element is in the activation position, a corresponding movement of the locking element is prevented.

From a structural point of view, it has further proved advantageous if the emergency activating element has a blocking contour (blocking linkage) for blocking a movement of the locking element about the emergency unlocking axis from the locking position into the emergency unlocking position. The emergency activation element may interact with the locking element by a blocking profile, preventing movement of the locking element. The emergency activation element may be configured in the manner of a rocker lever with respect to the emergency activation shaft. The blocking contour may be arranged on one side of a rocker and provide a treatment area for manually moving the emergency activation element on one side of the other rocker.

Furthermore, it is advantageous if the blocking contour has a stop face and a sliding face. In the active position, the stop surface can be located in the path of movement of the locking element, and in the release position, the sliding surface can play a guiding role when the locking element is moved around the emergency release shaft. In the release position, the stop surface may be located in a pivot path of the locking element such that the stop surface prevents movement of the locking element. Thus, the stop surface may function as a ratchet. If the emergency activation element is transferred to the release position, the stop surface moves out of the path of movement of the locking element, thereby allowing the locking element to move to the emergency unlocking position. During this movement, a part of the locking element, in particular the locking tooth, slides on a sliding surface of the locking element. The sliding surface can thus serve as a guide for the movement of the locking element, preventing jamming of the locking element and ensuring a reliable emergency opening of the closing element. The sliding surface may be configured as a circular path. The centre point of the circular path may coincide with the emergency unlocking axis in the release position. The sliding surface may have one or two side walls to ensure lateral guidance of the locking element.

Furthermore, it proves to be structurally advantageous if the blocking contour has a fork-shaped design. The locking contour can be designed in particular in the manner of a double fork (two-pronged fork), which makes it possible to distribute the forces uniformly. The locking profile can thus comprise in each case two stop faces and two sliding faces.

With regard to the locking element, it has proven to be advantageous if it has a locking contour of at least one locking tooth in order to interact with the emergency activating element. The locking profile may be configured to correspond to a blocking profile of the emergency activation element, thereby enabling a reliable locking and release of the locking element. The locking contour can likewise have a fork-shaped design, in particular in a two-pronged manner. It is thus also possible to provide two locking teeth corresponding to the two stop surfaces. If the emergency activating element is pivoted into the release position, the locking tooth slides on the sliding surface of the blocking profile. Furthermore, the locking element can also have a latch, by means of which the locking element can be attached behind or in the frame of the closing element in order to fix the closing element relative to the frame.

It has further proved advantageous if the emergency activating element and the locking element are pivotably connected with the bearing element. The bearing element can thus ensure a connection between the emergency activating element and the locking element, so that a rotational movement of the emergency activating element about the activation axis causes a corresponding rotational movement of the locking element. Both the emergency release shaft and the emergency activation shaft may extend through the bearing element. The bearing elements in each case have a bore to accommodate a bearing bolt, which can serve as a pivot shaft for the emergency activating element and the locking element. Each bore may be arranged at one end of the bearing element, respectively.

The blocking profile of the emergency activation element and the locking profile of the locking element may be arranged on different sides of the bearing element and engage around respective ends of the bearing element. Thus, the advantage of designing the blocking profile and the locking profile as double prongs, one prong on one side of the bearing element and the other on the other side thereof, is that the force distribution is even. The bearing element can also have a stop device, in particular a stop pin, which can interact with the locking element in order to limit the movement of the locking element, in particular in the direction of the locking position. In this way the position of the locking element can be determined as accurately as possible.

Furthermore, it is advantageous if the bearing element is rotationally coupled with the activation element by means of a connection element. This allows the locking element to be simply rotated between the locked and unlocked positions by the activation element. The connecting element may take the form of a profiled steel bar (profile bar), in particular a square bar, and the bearing element may have a correspondingly shaped bore in which the connecting element is received. Being of profiled and thus non-circular design, the activation element and the bearing element may be positively rotationally coupled to each other. The connecting element may extend through the closure element, thereby connecting an activation element arranged on the outside with an element arranged on the other side of the closure element. The activation shaft may extend in particular through the center of the connecting element and thus also through the center of the bearing element. The emergency activation element and the locking element and/or the emergency activation shaft and the emergency unlocking shaft may be arranged on opposite sides of the bearing element with respect to the activation shaft.

In the closing element, a bearing seat may be provided for the bearing of the connecting element, which bearing seat may be mounted in the closing element without rotation. To this end, the bearing seat may have a non-circular profile. The bearing block can have a cylindrical bearing bore in which the connecting element can rotate about the activation axis.

It has further proved advantageous if the emergency activating element is pretensioned into the activated position by means of a spring element. By pretensioning, the emergency activating element can be held in the activated position, so that the closing element is reliably locked. The spring element can pretension the emergency activation element against the bearing element. The bearing element may have, for example, a bearing tongue supporting the spring element. The respective spring element may be configured as a helical compression spring.

Furthermore, it has proven to be advantageous if the locking element is prestressed by means of a spring element. The spring element can pretension the locking element in the direction of the locking position. The spring element ensures that the locking element is firmly fixed in the locking position. If the emergency activating element is transferred to the release position, the locking element must be moved in reverse under the action of the spring in order to open the closing element. This force must therefore also be exerted by a person on the emergency activation element or directly on the closure element. The spring element may be supported relative to the bearing element. The spring element may be configured as a torsion spring.

In addition, it is also possible for a corresponding spring element to bias the locking element in the direction of the emergency unlocking position. In this case, if the emergency activating element is moved into the release position and the closing element can be opened, the locking element automatically snaps into the emergency unlocking position.

In order to protect the closing element from being opened by tampering in the locking position, it has proven to be advantageous if the activation element can be fixed by fixing means. The securing means may prevent rotational movement of the activation element about the activation axis. Since the activation element is rotationally coupled with the bearing element and thus also with the emergency activation element and the locking element, the locking element can accordingly also no longer rotate about the activation axis. In this position, the closure element is thus reliably locked. Only when the emergency activating element is transferred into the release position and then the locking element is transferred into the emergency unlocking position can the closing element be opened after the activating element has been secured. The securing device may be configured as a lock, in particular as a padlock. The activation element may be fixed relative to the closure element by fixing means such that it cannot rotate relative to the closure element.

The terms used in relation to the locking device in relation to the inner side and the outer side of the closing element or door are to be understood as examples. The invention can also be applied in a similar manner in reverse. Thus, the activation element may also be arranged on the inner side, while the bearing element, the locking element and the emergency activation element may also be arranged on the outer side of the closing element.

In addition, with regard to the initially mentioned object, a closing element, in particular a door, is proposed, which has a locking device of the type described above. The advantages mentioned above with regard to the locking device result therefrom.

It has proven advantageous for the arrangement of the elements if the activation axis extends perpendicularly through the closing element. For doors, this corresponds to the normal direction of the door panel. The emergency unlocking shaft and the emergency activation shaft may run parallel to the closing element or the door panel.

The object of the invention is also to provide a corresponding method for emergency unlocking of a locking device.

This object is achieved by a method having the features of claim 15, according to which the locking device has a locking element which can be rotated back and forth about an activation axis between a locking position and an unlocking position, wherein the locking element is pivoted about an emergency unlocking axis from the locking position into the emergency unlocking position for the purpose of emergency unlocking, wherein the emergency unlocking axis and the activation axis are arranged at an angle to one another. Unlocking is also allowed if the locking element is pivoted about the emergency unlocking shaft, and the closing element can be opened when a normal unlocking movement, i.e. a rotational movement about the activation shaft, is not possible.

It is advantageous if the locking device is configured in the manner described above. This results in the advantages described in connection with the locking device.

Further advantages and developments of the invention are described below with the aid of exemplary embodiments. In the drawings:

fig. 1 shows a perspective side view of a locking device;

fig. 2 shows a rear view of the locking device according to fig. 1;

FIG. 3 shows a simplified exploded view of the locking device;

fig. 4 shows a top view of a locking device arranged on a door;

fig. 5 is a top view according to fig. 4 without the door.

The locking device 10 shown in the drawings can be used to lock a door 20. The locked state of the locking device 10 is shown in fig. 1. This can be seen from the position of the locking element 3, which will also be explained further below in connection with fig. 4. In the position shown, the door 20 is fixed relative to the fixed frame 21 of the door 20, so that the door 20 cannot be opened.

In order to open the door 20, the locking element 3 must first be transferred from the illustrated locking position into the unlocking position. For this purpose, the activation element 4 arranged outside the door 20 is rotated about the activation axis B. The activation element 4 is rotationally coupled to the locking element 3, so that the locking element 3 is correspondingly also rotated about the activation axis B. In the exemplary embodiment shown, it is necessary to rotate the activation element 4 by about 90 degrees until the locking element 3 is rotated enough that it no longer engages behind the door frame 21 and the door 20 can be opened.

In order to move the locking element 3 in the same way from the inside of the door 20, an emergency activating element 1 is provided on the inside of the door 20, the function of which is exactly the same as the activating element 4. The emergency activating element 1 is also coupled with the locking element 3, so that a rotational movement of the emergency activating element 1 about the activation axis B causes a corresponding movement of the locking element 3. However, the emergency activating element 1 is coupled here not only to the locking element 3 but also to the further activating element 4 by means of a connecting element 9, which connecting element 9 is configured as a square pin as shown in fig. 3. In the case of a rotational movement about the activation axis B, the emergency activation element 1 and the activation element 4 and the locking element 3 therefore move simultaneously.

In order to be able to secure the door 20 reliably against unauthorized opening, a securing device 5 configured as a padlock is provided on the outside. The fixing means 5 can prevent the activation element 4 from moving or rotating about the activation axis B relative to the door 20. This is because the activation element 4 is positively fixed relative to the bearing shield 2.2 by the fixing means 5. As shown in the exploded view of fig. 3, the bearing shield 2.2 is connected to the bearing block 2.1 in a non-rotatable manner. The bearing block 2.1 is mounted in the door 20 in a non-rotatable manner by means of its non-circular outer contour, so that the activation element 4 is also fixed relative to the door 20 by means of the fixing device 5.

In order to open the door 20 by means of the activation element 4 and to pivot the locking element 3 into the unlocked position, the securing device 5 must first be removed and transferred into a position in which the activation element 4 can be rotated. Since the fastening device 5 can only be removed from the outside of the door 20 and transferred into the corresponding position, it is no longer possible to open the door 20 by rotating the emergency activating element 1 from the inside.

Nevertheless, in order to be able to open the door 20 when the rotation of the locking element 3 about the activation axis B is prevented by the fixing means 5, an emergency unlocking mechanism is provided, which can be operated from the inside of the door 20. For this purpose, the emergency activating element 1 can be pressed in the direction of the door 20, i.e. pivoted about an emergency activation axis E perpendicular to the activation axis B. This movement releases the locking element 3 and allows it to move about an emergency unlocking axis N perpendicular to the activation axis B and parallel to the emergency activation axis E. The structure and interaction between the emergency activating member 1 and the locking member 3 will now be described in more detail with the aid of fig. 3, and the movement of these members will then be described in more detail with the aid of fig. 4 and 5.

As shown in fig. 3, the emergency activating member 1 and the locking member 3 are both mounted on a common bearing member 8. Furthermore, it can be seen that the emergency activation shaft E, the emergency unlocking shaft N and the activation shaft B all pass through the bearing element 8. When the locking element 3 is activated by the activation element 4, the connecting element 9 extending through the door 20 and through the bearing block 2.1 rotates jointly accordingly. The connecting element 9 is rotationally coupled with the bearing element 8 by means of a square sleeve on the bearing element 8, so that when the activation element 4 rotates, the bearing element 8 also rotates jointly accordingly.

The left and right sides of the sleeve for the connecting element 9 are provided with holes enabling the bearing element 8 to be pivotally connected to the emergency activating element 1 and the locking element 3 and rotated 90 degrees on each side of the bearing element.

In the position shown in fig. 1 and fig. 4 and 5, the locking element 3 initially cannot pivot about the emergency locking axis N, since the emergency activating element 1 prevents a corresponding pivoting movement. As can be seen with reference to fig. 4, the emergency activating element 1 has a blocking contour 6 with a stop surface 6.1, which stop surface 6.1 is arranged in the respective movement path of the locking element 3, thus preventing a pivoting movement about the emergency unlocking axis N. The locking element 3 has a correspondingly configured locking contour 7 with a locking tooth 7.1, which locking tooth 7.1 in the position shown bears against the stop face 6.1. In this position, the emergency activating element 1 is thus coupled with the locking element 3, and the locking element 3 can be pivoted about the activation axis B by the emergency activating element 1, but not about the emergency unlocking axis N, as long as the fixing means 5 do not prevent a corresponding movement.

However, in order to now pivot the locking element 3 about the emergency unlocking axis N, the stop surface 6.1 must first be pivoted out of the path of movement of the locking element 3. Fig. 5 shows the corresponding movement in case of emergency activation. By applying a compressive force to the emergency activating element 1, the latter is rotated about the emergency activating axis E into the release position, so that the stop face 6.1 is pivoted out of the path of movement of the locking element 3. Since the stop surface 6.1 is no longer arranged in the path of movement of the locking element 3 or of the locking tooth 7.1, the locking element 3 can be pivoted about the emergency unlocking axis N from the locking position into the emergency unlocking position.

As can also be seen from fig. 4 and 5, the blocking contour 6 also has a curved contour in top view. This is the sliding surface 6.2, the exact design of which can best be seen in fig. 3. The sliding surface 6.2 serves as a guide for the locking element 3 or the locking teeth 7.1 in the release position of the emergency unlocking element 1, so that a guided movement of the locking element 3 is ensured during the movement about the emergency unlocking axis N.

As shown in fig. 4, the door 20 may be opened outward. During emergency unlocking, i.e. when the emergency unlocking element 1 is first rotated from the active position into the release position, a compressive force is applied to the emergency activation element 1. Since the direction of this compressive force is the same as the direction of the force required to open the door 20, it is only necessary to continue to exert a corresponding force on the door 20 or the emergency unlocking element 1 in order to open the door 20. In a corresponding movement, the locking element 3 or the bolt 3.1 of the locking element 3 is then pressed against the stationary door frame 21. Since the movement of the locking element 3 about the emergency unlocking axis N is activated, a further movement of the door 20 correspondingly causes the locking element 3 to pivot about the emergency unlocking axis N and does not prevent the opening of the door 20, whether or not the activation element 4 is fixed by the fixing means 5.

As shown in fig. 3, the emergency activating element 1 and the locking element 3 are both prestressed by means of a spring element. The emergency activating element 1 is prestressed into the activated position by a compression spring 1.1, so that in the event of an emergency unlocking the force of the compression spring 1.1 must be overcome. The locking element 3 is biased by a torsion spring 3.2 in the direction of the locking position. However, the torsion spring 3.2 can also pretension the locking element 3 in the direction of the emergency unlocking position. In this case, as soon as the emergency activating element 1 is moved into the release position and the stop face 6.1 is pivoted out of the path of movement of the locking element 3, the locking element 3 automatically springs into the emergency unlocking position.

Furthermore, as shown in fig. 3, both the blocking contour 6 and the locking contour 7 are configured in a two-pronged manner, so that in the event of an emergency unlocking, one of the prongs moves on one side of the bearing element 8 and the respective other prong moves on the other side of the bearing element 8. Furthermore, as shown in fig. 3, two sliding surfaces 6.2, two stop surfaces 6.1 and two locking teeth 7.1 are provided in each case on opposite sides of the bearing element 8.

List of reference markers:

1 Emergency activation element

1.1 compression spring

2.1 bearing seat

2.2 bearing shield

3 locking element

3.1 latch

3.2 torsion spring

4 activating element

5 fixing device

6 blocking profile

6.1 stop surface

6.2 sliding surface

7 locking profile

7.1 locking tooth

8 bearing element

9 connecting element

10 locking device

20 door

21 door frame

B activation shaft

E emergency activation shaft

N emergency unlocking shaft

Claims (16)

1. A locking device for a closing element, in particular a door (20), with a locking element (3) which can be rotated back and forth about an activation axis (B) between a locking position and an unlocking position, characterized in that for emergency unlocking the locking element (3) can be pivoted about an emergency unlocking axis (N) from the locking position into an emergency unlocking position, wherein the emergency unlocking axis (N) and the activation axis (B) are arranged at an angle to one another.

2. Device according to claim 1, characterized in that the emergency release shaft (N) and the activation shaft (B) enclose an angle of 45 to 135 degrees, preferably 70 to 110 degrees, particularly preferably 80 to 100 degrees, very particularly preferably 85 to 105 degrees, in particular 90 degrees.

3. Device according to any one of the preceding claims, characterized in that the locking element (3) is rotatable about the activation axis (B) by means of an activation element (4).

4. Device according to any one of the preceding claims, characterized by an emergency activation element (1) which is coupled with the locking element (3) in an activation position, so that the locking element (3) can be rotated back and forth between the locking position and the unlocking position by the emergency activation element (1) about the activation axis (B).

5. The device according to any of the preceding claims, characterized in that the emergency activation element (1) is coupled with the locking element (3) in the activated position such that the locking element (3) cannot move relative to the emergency activation element (1).

6. A device according to claim 5, characterized in that the emergency activating element (1) can be transferred to a release position in which the locking element (3) can be moved relatively with respect to the emergency activating element (1).

7. The device according to any of the preceding claims, characterized in that the emergency activation element (1) is coupled with the locking element (3) in the activation position and is not coupled with the locking element (3) in the release position.

8. Device according to any one of the preceding claims, characterized in that the emergency activation element (1) has a blocking contour (6) for blocking a movement of the locking element (3) about the emergency unlocking axis (N) from the locking position into the emergency unlocking position.

9. The device according to claim 8, characterized in that the blocking contour (6) has a stop surface (6.1) and a sliding surface (6.2), wherein the stop surface (6.1) is located in the path of movement of the locking element (3) in the active position and the sliding surface (6.2) serves as a guide when the locking element (3) is moved about the emergency release axis (N) in the release position.

10. Device according to any one of the preceding claims, characterized in that the locking element (3) comprises a locking profile (7) with at least one locking tooth (7.1) for interacting with the emergency activating element (1).

11. The device according to claims 4 to 10, characterized in that the emergency activating element (1) and the locking element (3) are pivotably connected to a bearing element (8).

12. Device according to any of the preceding claims, characterized in that the emergency activation element (1) is pretensioned into the activation position by means of a spring element (1.1).

13. The device as claimed in any of the preceding claims, characterized in that the locking element (3) is pretensioned by a spring element (3.2) which pretensions the locking element in the direction of the emergency unlocking position.

14. A device according to any one of the preceding claims, characterized in that the activation element (4) can be fixed by means of a fixing device (5).

15. A closing element, in particular a door, having a locking device (10) according to any one of the preceding claims.

16. Method for emergency unlocking of a closure element (20), in particular a door, with a locking device (10), wherein the locking device comprises a locking element (3) which can be rotated back and forth about an activation axis (B) between a locking position and an unlocking position, wherein the locking element (3) is pivoted about an emergency unlocking axis from the locking position to an emergency unlocking position for emergency unlocking, wherein the emergency unlocking axis (N) and the activation axis (B) are arranged at an angle to one another.

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