locking device

Abstract

The invention relates to a locking device (10) for locking a locking element, in particular a door, with a recess (1), a pivoting lever (2) which is hingedly mounted on the recess (1), which pivoting lever is rotatable about an actuating axis (B) in an extended position (A) and is non-rotatably locked in the recess (1) in a folded-in position (E), and a securing element (3) which secures the folded-in pivoting lever (2) in a securing position (S) against folding out, wherein the securing element (3) is designed as a latch which is spring-biased in the securing position (S).

Description

The invention relates to a locking device for locking a closing element, in particular a door, having a depression, a pivot lever which is mounted pivotably on the depression and which, in a deployed position, is rotatable about an actuating axis and, in a folded-in position, is locked in the depression in a non-rotatable manner, and a securing element which secures the folded-in pivot lever against being folded out in a securing position.Corresponding locking devices can be used in quite different areas of technology in order to lock elements, such as, for example. The doors, flaps, hatch, windows or the like can be locked so that they can no longer be opened. In order to open the corresponding closing elements, the locking device must then first be transferred from the corresponding locking position into an unlocking position.Usually, corresponding locking devices have a depression arranged on the outer side of the closing element, on which depression a pivot lever accessible from the outer side of the closing element is usually arranged. This pivot lever can be coupled via a closing shaft extending through the closing element to a locking element arranged on the inside of the door, so that the locking element can be rotated back and forth between the unlocking position and the locking position by a pivoting movement of the pivot lever about an actuation axis. In the locking position, the locking element can engage behind the frame of the closing element, so that the closing element is then fixed relative to the frame and accordingly cannot be opened any longer. If the locking element is rotated via the pivot lever into the unlocking position, it no longer engages behind the frame and the closing element can be opened again.In order to rotate the pivot lever about the actuation axis accordingly, however, the pivot lever must first be unfolded from the trough about an axis extending transversely to the actuation axis. This is because the pivot lever is movable between a position folded into the trough and a position folded out of the trough. In the folded-in position, a rotational movement about the actuation axis is prevented and the pivot lever is thus locked in the trough in an non-rotatable manner.In order to prevent undesired unlocking and opening of the closing element, the pivot lever can thus be secured via a securing element in the position folded into the trough. When the securing element is in a securing position, it is not possible to fold the pivot lever out of the depression and accordingly it cannot be pivoted about the actuation axis either for unlocking. For this purpose, the securing element must first be transferred into a release position in which the pivot lever is then accordingly no longer held or secured in the position folded into the trough, but rather can be folded out of the trough to enable a pivoting movement.Such a locking device is described, for example, in DE 20 2011 052 355 U1. In this case, a cylinder lock is used to secure the pivot lever folded into the trough, which cylinder lock has to be moved first into the release position via a key when the pivot lever is folded out, so that the lock thumb lies in the contour of the cylinder lock and the pivot lever can thereby be folded into the trough. When the pivot lever is fully folded and locked in the depression, the cylinder lock can be transferred by rotating the key into the securing position in which the lock thumb engages behind the depression and thereby secures the pivot lever against being folded out in the depression.Although this locking device has proven itself in practice, the cylinder lock must first always be transferred into the release position by a rotation of the key before the pivoting lever is folded in, since the lock thumb protruding laterally in the securing position otherwise collides with the depression when the pivoting lever is folded in and would thereby prevent folding in. Overall, the locking of the closing element with this device is therefore comparatively complicated.On this basis, the object of the invention is to specify a locking device which is distinguished by the possibility of simplified locking.This object is achieved in a locking device of the type described above in that the securing element is designed as a latch spring-biased into the securing position.As a result of this configuration, it is not necessary for the pivoting lever to be folded into the depression to actively move the securing element beforehand into the release position, so that the locking process is simplified overall. A push-to-lock function is thus provided and the pivot lever can be folded into the depression in a simple manner and independently of the securing element or of the position of the securing element, and the securing element can latch behind the depression or latch into the depression for securing the pivot lever on account of the spring prestress.Furthermore, it has proven to be advantageous if the securing element and the depression are configured such that the securing element, when the pivot lever is folded in, latches behind the depression for securing the pivot lever, in particular latches behind it automatically. By means of the rear catch, the securing element can secure the pivot lever in the trough, so that the latter can then no longer be deployed. The pivot lever and the trough can thus be connected to one another in a positive-locking manner via the securing element in the folded-in position. Due to the locking of the pivot lever in the depression, it is not possible to rotate the pivot lever about the actuation axis for unlocking. In order to fold the pivot lever out of the trough, the rear catch must first be released or released again, for which purpose the securing element can be transferred into a release position.When the pivot lever is folded into the depression, the securing element can come into contact with the depression, yield automatically counter to the spring prestress and be transferred into a prestress position. When the pivot lever is then fully folded in, the securing element, driven by the spring prestress, can automatically latch behind the depression in order to secure the pivot lever. In this case, the securing element can be transferred from the prestressing position into the securing position. In order to lock the closing element, it is only necessary in this respect to fold the pivot lever into the depression. The yielding movement of the securing element and the rear engagement of the depression then take place automatically and do not require any manual movement of the securing element.With regard to the securing element, it has furthermore proven to be advantageous if it has a run-on contour which prestresses the securing element into a prestressing position when the pivot lever is folded into the depression. Due to the contact contour, the securing element can yield independently when the pivot lever is folded into the depression. An active movement of the securing element is not required for this purpose. The run-on contour can have a run-on slope which, due to the folding-in movement of the pivot lever, leads to an yielding movement of the securing element when in contact with the depression. In this case, the securing element can be transferred into the prestressing position and spring-prestressed, so that, when the pivot lever is fully folded in, it can automatically latch behind the depression. In the rear-locked position, the securing element is then in the securing position. It is advantageous if the depression has a correspondingly designed run-on contour, wherein the run-on contour of the securing element comes into contact with the run-on contour of the depression when it is folded in, and the securing element can then be moved into the prestress position, as has been explained above.According to a structurally advantageous development of the invention, it is provided that the securing element is of annular configuration. The contact contour can be designed as a radial projection tapering in the circumferential direction. As a result of this configuration, the securing element can be rotated when the pivot lever is folded in and when it makes contact with the depression. The radial projection can taper in the circumferential direction and thus have an arrow-shaped or V-shaped geometry in the circumferential direction. The flank of the radial projection coming into contact with the depression during folding can function as a run-on slope and initiate a rotational movement of the securing element into the prestress position. The directions mentioned are defined in the annular securing element on the basis of the longitudinal axis extending concentrically through the annular securing element. The radial direction thus denotes a direction perpendicular to the longitudinal axis. The longitudinal axis may correspond to the release axis.According to an alternative embodiment, it is provided that the securing element is designed in the form of a latch and the run-on contour is arranged at one end of the securing element. The bolt-shaped configuration is distinguished by a constructionally simple structure. The securing element can extend transversely to the actuation axis and parallel to the pivot axis of the pivot lever. The securing element can be designed in the form of a block in this construction and can therefore have a high stability. The run-on contour can be arranged at a distal end of the securing element, which comes into contact with the depression when the pivot lever is folded in. In this embodiment, the securing element can be moved in a linear direction into the prestressing position when the pivot lever is folded in, when it comes into contact with the depression.Furthermore, it has proven to be advantageous if the securing element can be rotated back and forth about a release axis between a securing position and a release position, wherein the pivot lever can be pivoted out of the trough in the release position. In the securing position, the securing element can engage behind the depression and in the release position, the securing element cannot engage behind the depression. When the securing element has been moved into the release position, the pivot lever can thus be released and transferred from the folded-in position into the folded-out position and then be rotated about the actuation axis for unlocking. The release axis can extend parallel to the actuation axis and thus be arranged perpendicular to the door or closing element plane.For releasing the securing element, it has furthermore proved to be advantageous if an actuation is provided by means of which the securing element can be rotated from the securing position into the release position. The rotation thus allows the pivot lever to be selectively released and then to be pivoted out of the depression. The securing element can advantageously be rotated manually into the release position, in particular from the outside of the closing element. However, an electrical movement via a drive, such as an electric motor, is also possible. Furthermore, the securing element can also be transferred from the release position into the securing position. For this purpose, the securing element can be rotated in the opposite direction about the release axis. Due to the design of the securing element as a spring-biased catch, however, this is not absolutely necessary. This is because the pivot lever can be folded in independently of the position of the securing element, so that no active transfer into the release position is required for folding in.For rotating the securing element, in particular from the securing position into the release position, the actuation can be rotationally coupled to the securing element. The rotary coupling can be of indirect or direct nature, as will be explained in more detail below.For rotating the securing element, in particular from the securing position into the release position, the actuation can be rotationally coupled to the securing element. The rotary coupling can be of indirect or direct nature, as will be explained in more detail below. In the case of a direct coupling, the actuation can be rotationally coupled to the securing element in a positive-locking manner. The actuation can have a connecting section for this purpose. The connecting portion can have a non-round cross section, so that the securing element can be held on the connecting portion in a rotationally fixed manner via a correspondingly configured receptacle. Advantageously, the connecting section can have a profiled, in particular a square, cross section, for example. In the case of an indirect coupling of the actuation and the securing element, the actuation can be coupled, in particular connected in a rotationally fixed manner, to an intermediate element via the connecting section.With regard to the configuration of the actuation, it has furthermore proven to be advantageous if it has a locking cylinder. The securing element can thus be rotatable about the release axis via a matching key. The securing element can be rotated back and forth about the release axis via the locking cylinder, in particular before the securing position into the release position. The locking cylinder can have a locking cylinder core or a roller which can only be rotated about the release axis by means of a matching key. If the actuation has a locking cylinder, the connecting section can be connected to the roller or to the locking cylinder core, so that the connecting section and thus correspondingly also the closing element or the intermediate element can then be rotated. When the pivot lever is folded into the depression, the key matching the locking cylinder is required for releasing the pivot lever and thus also for unlocking the closing element. Access control can thus be ensured by the locking cylinder.According to an alternative embodiment, it has proven to be advantageous if the actuation comprises a tool actuation. The securing element can thus be rotatable about the release axis via a tool. The tool actuation can have an interface, so that the tool actuation and thus also the securing element can be rotated via the tool, in particular from the securing position into the release position. By means of the tool actuation, it is thus possible to prevent the securing element from being moved easily. In this respect, access control can also be effected by the tool actuation. To rotate the tool actuation or the securing element via the tool actuation, a double bit tool, a switch cabinet wrench or, for example, also a square or a hexagonal wrench can be used. The tool actuation can have a correspondingly correspondingly designed interface which is accessible from the outside of the closing element.According to an advantageous development of the invention, it is provided that the securing element is prestressed into the securing position by means of a spring. Due to the prestress, it is not necessary to actively rotate the securing element from the release position into the securing position, but rather, if no force is applied to the securing element via the actuation, the securing element is moved by the spring into the securing position. The securing element can thus automatically spring into the securing position when the pivot lever has been folded into the depression and is arranged in the folded-in position. Thus, a reliable securing of the pivot lever in the depression can be achieved and it is not possible for the folded-in pivot lever not to be unintentionally secured in the depression.With regard to the prestress of the securing element, it has proven advantageous if the securing element is prestressed about the release axis into the securing position by means of a spring designed as a torsion spring. The torsion spring can act on the securing element to rotate the securing element about the release axis into the securing position. This configuration can be used in particular if the securing element is of annular configuration, as has been described above. When the pivot lever is folded in, the securing element can be rotated counter to the force of the torsion spring and thus tension the torsion spring. The torsion spring can be arranged concentrically with respect to the securing element. One end of the torsion spring can be connected to the securing element and the other end can be fixed immovably, for example to a mounting element described in more detail below.With regard to the configuration of the securing element, it has proven to be advantageous if this is configured as a rotatable helical latch. As a result of this configuration, the securing element can be rotated away about the release axis into the prestress position when the pivot lever is folded in, which allows the pivot lever to be completely folded into the depression. When the pivot lever is fully folded in, the securing element can spring from the pretensioning position into the securing position.It has proven to be advantageous if the securing element is arranged in the same position in the pretensioning position and in the release position. The securing element can thus be moved in the same manner, in particular rotated about the release axis in the same manner, during the folding-in of the pivot lever and also during the release of the securing element via the actuation. This configuration has proven itself in particular in the case of actuation by means of a tool actuation. When folding in the pivot lever, the actuation, in particular the tool actuation, can be rotated about the release axis by the securing element coming into contact with the depression.In an alternative embodiment, the spring can be designed as a helical spring, by means of which the securing element is prestressed radially with respect to the release axis into the securing position. The securing element can be arranged so as to be movable in a linear direction and in particular radially with respect to the release axis. When the pivot lever is folded in, the securing element can thus be moved in a linear direction counter to the force of the helical spring when the latter comes into contact with the depression via the contact contour. The helical spring can thus bias the securing element in a linear direction. The securing element can be movable relative to the actuation, in particular linearly movable. In practice, this configuration has proven itself if the actuation has a locking cylinder.With regard to the configuration of the securing element, it has furthermore proven to be advantageous if this is configured as a linearly movable helical catch. The securing element can thus be automatically engaged in a linear direction counter to the force of the spring during folding and can thereby be transferred into the prestressing position. By the tension of the spring, the securing element can latch behind the depression or latch into it when the pivot lever is fully folded into the depression.Furthermore, it has proven to be advantageous if the securing element is arranged in different positions in the pretensioning position and in the release position. To release the pivot lever, the securing element can be rotated about the release axis via the actuation from the securing position into the release position, as has already been described above. Due to the linear relative movement of the securing element with respect to the actuation, the securing element can thus be in a different position in the prestressing position, i.e. when the securing element has been moved in the linear direction counter to the force of the spiral spring as a result of the pivoting lever being folded in, than during the rotational movement into the release position. This configuration can be used in particular if the actuating element has a locking cylinder. This is because the locking cylinder or the roller of the locking cylinder cannot usually be rotated via the securing element, even if no matching key is inserted into the locking cylinder. In this respect, it is especially advantageous in this embodiment if the securing element can also be moved relative to the actuation. This relative movement can then result in the two different positions in the prestressing position and in the release position. In the pretensioning position, the pivot lever can be folded completely into the trough and in the release position, the pivot lever can be folded out of the trough.As already explained above, it has proven to be advantageous if the securing element is movable relative to the actuation. The securing element can move relative to the actuation during the folding-in of the pivot lever or due to the contact with the depression during the folding-in. Depending on the configuration of the securing element, the securing element can be decoupled from the actuation in a rotation-decoupling manner in the case of an annular securing element and can be decoupled from the actuation in a linear direction in the case of the latch-shaped securing element. In this respect, a freewheel can be provided which allows a relative movement of the securing element with respect to the actuation.In this context, it has furthermore proved to be advantageous if the securing element is movable from the securing position into the pretensioning position relative to the actuation. The actuation can thus not move when the pivot lever is folded in and the securing element is transferred accordingly into the pretensioning position. It is precisely when the actuation has a locking cylinder that can remain closed or can already be closed in advance independently of the position of the pivot lever. Even in the closed state, the pivot lever can then be folded into the trough and secured via the securing element in the folded-in position.To enable a relative movement, it has proven to be advantageous if the actuation is connected to the securing element via an intermediate element. The intermediate element can be connected to the actuation in a rotationally fixed manner and the securing element can be arranged in a relatively movable manner with respect to the intermediate element. In this respect, a relative movement between the securing element and the actuation can be achieved via the intermediate element. The intermediate element can thus allow a free-wheeling of the securing element relative to the actuation. On the other hand, the intermediate element can, however, ensure a movement of the securing element via the actuating element without a relative movement taking place in this actuating direction. In this respect, a reliable transfer of the securing element from the securing position into the release position can be ensured. It is also possible for the intermediate element to be connected integrally to the actuation device or for it to be formed integrally to the actuation device.According to an advantageous embodiment, it is provided that the securing element is arranged rotatably relative to the intermediate element in a predetermined angular range. A relative movement exceeding the angle range or a relative rotational movement exceeding it can be prevented. From a constructional point of view, the intermediate element can be sleeve-shaped and can be connected on its inner side to the actuation and on its outer side to the securing element. The intermediate element can thus function as a coupling element between the actuating element and the securing element. The intermediate element can have a non-round free inner cross section, in particular a square cross section. The free inner cross section can be designed as a receptacle, via which the intermediate element can be connected to the actuation in a rotationally fixed manner. A rotation of the actuation, i.e. of the roller of a locking cylinder or of the tool actuation, can thus lead to a corresponding rotation of the intermediate element. The securing element can have a cylindrical bore in which the intermediate element is accommodated in a certain angular range so as to be rotatable with respect to the securing element. This bore can thus function as a receptacle. The outer cross section of the intermediate element can be adapted to the bore of the securing element and have a substantially circular cross section.According to an advantageous development of the securing element, it has proven advantageous if this has at least one, in particular two, stops and the intermediate element has at least one, in particular two, stops, by means of which the relative movement of the securing element with respect to the intermediate element can be limited. To limit the relative movement, the stops can each bear against one another and thus prevent a further relative movement. It can be provided that the intermediate element has one and the securing element two, or it can be provided that the intermediate element has two and the securing element has a stop. The relative movement of the securing element can be limited between the securing position and the prestressing position. In this respect, the respective stops can abut each other in the securing position and in the prestressing position. Since the intermediate element can be arranged in the bore of the securing element, the intermediate element and the securing element can be arranged correspondingly concentrically with respect to one another.In an alternative embodiment, the securing element can be linearly guided in the intermediate element. The intermediate element can thus be connected to the actuation on one side, in particular rotatably coupled to the actuation element, and on the other side can have a linear guide for connection to the securing element. The linear guide can be designed as a recess which extends in the radial direction with respect to the release axis and in which the securing element, which is in particular latch-shaped, is movably accommodated. The recess can thus ensure that the securing element can be moved only in a direction linear and radial or perpendicular to the release axis relative to the intermediate element and thus also relative to the actuation. The recess can have a base, so that a spring, in particular a spiral spring, can be provided between the base and the securing element. The securing element can then be movable back and forth in a linear direction in the recess and counter to the force of the spring between the securing position and the prestressing position. During a rotational movement of the actuating element between the release position and the securing position, the intermediate element can correspondingly rotate together, so that during a corresponding rotational movement the recess and thus also the securing element can likewise be rotated about the release axis.From a constructional point of view, it has proven to be advantageous if the intermediate element is bolt-shaped. This allows a rotation about the release axis on the one hand, but also offers sufficient space for the linear guide and for the reception of the securing element. The intermediate element can be rotatably mounted in the mounting element described in more detail below.According to another embodiment, it has proven to be advantageous if the securing element is firmly connected to the actuation. In this case, therefore, no relative movement can take place between the securing element and the actuation. The securing element can be connected to the actuation in a rotationally fixed manner. The receptacle of the securing element can be designed for this purpose, for example, as a non-round or as a profiled, in particular as a square-shaped, free inner cross section. The securing element can thus be arranged on the connecting section of the actuation in a rotationally fixed manner, in particular in a positively locking manner. Such a positive connection ensures a reliable coupling of the movement between the securing element and the actuation. This configuration can be used in particular in the case of an annular securing element and a tool actuation. The tool actuation can have a square-shaped section at its rear end and the receptacle of the securing element can be designed correspondingly, so that the securing element can be mounted on the actuation in a rotationally fixed manner and connected to the actuation. If the securing element is prestressed into the securing position via a spring, in particular a torsion spring, the coupling between the securing element and the actuation can correspondingly also be used to prestress the actuation via the spring into the securing position.According to an advantageous development of the invention, it is provided that the securing element is movable together with the pivot lever. The securing element can be movable about the pivot axis via the pivot lever. The securing element can be arranged on the pivot lever side, so that the pivot lever is secured to the depression via the securing element when the securing element engages behind the depression or engages in the depression.For mounting or connecting the securing element to the pivot lever, it has proven advantageous if a mounting element is provided, wherein the securing element is arranged in the mounting element via the actuation and wherein the mounting element is arranged in the pivot lever. The securing element can thus be connected to the pivot lever via the mounting element and the actuation. In this respect, the actuation can also be connected to the pivot lever and can be folded in and out together with the latter about the pivot axis. The mounting element can be arranged in the lower region of the pivot lever, in particular in the end region of the pivot lever opposite the pivot axis. The mounting element can have a receptacle for the actuation and the actuation can be arranged releasably in the mounting element.Furthermore, it has proven to be advantageous if the mounting element, the actuation element and the securing element form a securing assembly. This securing assembly can be pre-assembled and thus connected as a coherent component to the pivot lever. Advantageously, the securing assembly can be inserted from the front side of the pivot lever into a corresponding receptacle of the pivot lever and then connected to the pivot lever, for example via one or more screw connections. Advantageously, the screw connection is not accessible from the outside, but the securing assembly can be screwed to the pivot lever from the rear. The further components of the locking device, such as in particular the spring and the intermediate element, can also be part of the securing assembly and thus be pre-assembled.Furthermore, the securing assembly can be held together by a single screw. The actuation or the connecting section of the actuation can for this purpose have a receptacle with a thread which can be arranged concentrically with the release axis. The intermediate element and / or the securing element can thus be plugged onto the actuation or the connecting section of the actuation in the axial direction, in particular plugged on in a rotationally fixed manner, and then connected to one another in the axial direction by means of a screw.With regard to the mounting element, it has furthermore proven to be advantageous if it is designed as a mounting adapter for mounting various actuations. In this respect, various actuations, such as, for example, a tool actuation or an actuation with a locking cylinder, can be used. The actuation can thus be detachably connected to the mounting element. The tool actuation can be mounted rotatably, in particular about the release axis, in the mounting element. The locking cylinder can be mounted in the mounting element in such a way that the roller or the locking cylinder core of the locking cylinder can be rotated via a key, but no rotational movement is possible in the mounting element without a matching key. The lock cylinder can thus have a cylinder housing which is connected to the mounting element in a rotationally fixed manner and in which the roller or the lock cylinder core is rotatably mounted via a matching key.According to an advantageous development of the invention, it has proven advantageous with regard to the depression if the latter has a pivot lever receptacle into which the pivot lever can be folded. In the folded-in position, the pivot lever can be locked in a positive-locking manner against a rotational movement about the actuation axis. The depression can laterally surround the pivot lever in the folded-in position such that it cannot be rotated about the actuation axis. The trough can thus have a pivot lever receptacle, into which the pivot lever can be folded and in which the pivot lever is locked.With regard to the trough, it has furthermore proven to be advantageous if it has a trough opening. The securing element can be moved through the trough opening when the pivot lever is folded in and then, when the folded-in position is reached, can latch behind the trough opening. The trough opening and the closing element can thus be adapted to one another in such a way that the closing element can pass the trough opening in the release position and in the prestressing position and cannot pass the latter in the securing position. The trough opening can be arranged in the lower part of the pivot lever receptacle.Furthermore, with regard to the object mentioned at the beginning, a closing element, in particular a door, is proposed, wherein the closing element has a locking device which is configured in the manner described above. With regard to the advantages of the locking device, reference is made to the above explanations.Further details and advantages of the invention will be explained in more detail with reference to the attached representations of an exemplary embodiment. Shown therein are: FIG. 1 is a perspective side view of a locking device; FIGS. 2 a, 2 b show a perspective view of the rear side of a depression of the locking device, wherein the pivot lever is in two different positions; FIG. 3 is an exploded view of a securing assembly with a locking cylinder and an annular securing element; FIG. 4 is an exploded view of a securing assembly with a tool actuation and an annular securing element; FIG. 5 is an exploded view of a securing assembly with a locking cylinder and a bolt-shaped securing element; FIGS. 6 ato f show perspective side views of various components of the locking device.The illustration of FIG. 1 shows a locking device 10 with which a closing element, such as a door, can be locked in a closed position, so that it is first necessary to unlock the locking device 10 in order to open the door. In order to optionally lock or unlock the locking device 10, it has a pivot lever 2 which is accessible from the front side of the door and which is rotationally coupled via a closing shaft 1.3 extending through the door to a locking element, for example in the manner of a pre-friction tongue, which is not shown in the illustrations and is arranged on the inner side of the door. The pivot lever 2 can be rotated back and forth about an actuation axis B and, on account of the connection to the locking element, the latter can be moved accordingly between a locking position locking the door and an unlocking position unlocking the door.In the locking position, the locking element engages behind the frame of the door, so that the door is fixed relative to the fixed frame and is no longer movable. If the locking element is then rotated by hand about the actuation axis B via a rotation of the pivot lever 2, the locking element is also moved accordingly until it then no longer engages behind the frame of the door and the door can be opened again.The pivot lever 2 is not only rotatable about the actuation axis B, but it is also pivotable about a pivot axis W arranged perpendicular to the actuation axis B, as can be seen from the illustration of FIG. 1. In this respect, the pivot lever 2 is rotatably coupled to the closing shaft 1.3 about the actuation axis B, but is also arranged to be pivotable relative to the closing shaft 1.3 about the pivot axis W.Furthermore, the locking device 10 comprises a trough 1, which is arranged on the outside of the door and through which the closing shaft 1.3 extends. The well 1 can also be seen in the illustration of FIG. 1. The trough 1 has a pivot lever receptacle 1.1, into which the pivot lever 2 can be folded during a pivoting movement about the pivot axis W, that is to say that the pivot lever 2 is moved relative to the trough 1 during a movement about the pivot axis W. In the folded-in position E, the depression 1 borders the pivot lever 2 laterally, so that a rotational movement of the pivot lever 2 about the actuation axis B is then not possible. The pivot lever 2 is rather locked in the trough 1 in this folded-in position E. The folded-in position E and the folded-out position A can also be seen in the representations of FIGS. 2 aand 2 b.Since the pivot lever 2 is not rotatable about the actuation axis B in the folded-in position A, it is also not possible to unlock the door in this respect. For this purpose, the pivot lever 2 must first be pivoted out of the trough 1 about the pivot axis W to such an extent that it is no longer arranged in the pivot receptacle 1.1. The depression 1 then no longer borders the pivot lever 2 laterally and can therefore no longer prevent a rotational movement about the actuation axis B. By means of a rotational movement of the pivot lever 2, the door can then be unlocked.Due to the rotational locking of the cradle 1, the door can be reliably protected against unauthorized unlocking as long as the pivot lever 2 cannot be pivoted out of the cradle 1. By securing the pivot lever 2 in the recess 1 or in the pivot lever receptacle 1.1 of the recess 1, unlocking of the door can thus be prevented. In order to thus secure the pivot lever 2 in the depression 1, a securing element 3 is provided, which can be seen in the illustration of FIGS. 1 and 2 band which is shown in an enlarged perspective illustration in the illustrations of FIGS. 6 band 6 c. In the folded-in position E, this securing element 3 can engage behind the trough 1 or engage therein and thus ensure that the pivot lever 2 cannot be folded out about the pivot axis W. The pivot lever 2 is then secured in the trough 1 via the securing element 3 and in order to move the latter back into the deployed position A, it is first necessary to transfer the securing element 3 from the securing position S into a release position F, in which the securing element 3 no longer engages behind the trough 1.In order to transfer the securing element 3 from the securing position S into the release position F, the latter is connected to an actuation device 6, which is accessible from the outside of the door. By means of the actuation 6, the pivot lever 2 can thus be released and can be pivoted out of the depression 1.Since the securing element 3 engages behind the depression 1 in the securing position S, it must be transferred, when the pivot lever 2 is pivoted in, into a position in which the securing element 3 does not impair or block a corresponding movement of the pivot lever. This is because, since the pivot lever 2 cannot be folded out of the trough 1 when the securing element 3 is in the securing position S, the pivot lever 2 cannot be correspondingly folded into the trough 1 if the securing element 3 were to remain in this position.However, in order that the securing element 3 does not have to be actively transferred into a release position F every time for folding the pivot lever 2 into the depression 1, it is provided that the securing element 3 is designed as a spring-biased catch in the securing position S. This configuration ensures that the securing element 3 escapes independently when the pivot lever 2 is folded in when the depression 1 is in contact, so that although a collision with the depression 1 occurs, it does not prevent the pivot lever 2 from folding in. Due to the yielding movement of the securing element 3 counter to the force of a spring 5, the spring is tensioned when the pivot lever 2 is pivoted in, and the securing element 3 can then automatically latch behind the depression 1 when the pivot lever 2 has been pivoted completely into the depression 1. Overall, a push-to-lock function is thus provided. This means that the pivot lever 2 can be simply folded into the well 1 and the latter is then automatically secured to or in the well 1 via the securing element 3. In order to swing the pivot lever 2 out of the well 1 again, it is then first necessary to transfer the securing element 3 manually from the outside of the door into the release position F via the actuation 6.The securing element 3 and the actuation 6 are connected to the pivot lever 2 via a mounting element 4 or are arranged via the mounting element 4 in the end of the pivot lever 2 opposite the pivot axis W. As can be seen from the illustration in FIG. 1, the pivot axis W is arranged in the upper region of the pivot lever 2 and the mounting element 4 is correspondingly arranged in the lower region of the pivot lever 2. The mounting element 4 is also shown in the representations of FIGS. 6 eand 6 f.The mounting element 4 together with the actuation 6 and the securing element 3 forms a securing assembly 9, which is illustrated in the illustration of FIGS. 3, 4 and 5. This securing assembly 9 can be pre-assembled and connected as a component to the pivot lever 2. For this purpose, the securing assembly 9 can be inserted from the front into the pivot lever 2 or into a corresponding receptacle of the pivot lever 2 and then connected to the pivot lever 2 from the rear side thereof by means of a screw. The securing assembly 9 and thus also the securing element 3 and the actuation 6 are then pivoted together with the pivot lever 2 about the pivot axis W in the mounted state and likewise rotated together with the pivot lever 2 about the actuation axis B for locking or unlocking.In the representations of FIGS. 3, 4 and 5, differently configured securing assemblies 9 are now each shown in an exploded view. The main difference lies primarily in the configuration of the actuation 6 and of the securing element 3.In the embodiment shown in the illustration of FIG. 3, the actuation 6 has a locking cylinder 6.1 with a roller rotatable about a release axis V via a key. The roller can only be rotated when a suitable key has been inserted into the locking cylinder 6.1. The locking cylinder 6.1 has at the rear end a connecting section 6.3 with a square cross section, via which it can be connected to the securing element 3 in order to transfer it from the securing position S into the release position F.However, as can be seen further from the illustration of FIG. 3, the actuation 6 or the locking cylinder 6.1 is not directly connected to the securing element 3, but indirectly via an intermediate element 7. The square-shaped inner cross section functions as a receptacle 7.2 for the form-fitting reception of the square-shaped connecting section 6.3 of the actuation 6, so that the intermediate element 7 can be rotated about the release axis V by means of the key in the same direction as the roller.The securing element 3 is of annular geometry and it has a cylindrical receptacle 3.2 which is arranged concentrically with respect to the release axis V. This receptacle 3.2 is adapted to the outer cross section of the intermediate element 7, so that the intermediate element 7 can be mounted in the receptacle 3.2 of the securing element 3 with substantially no play. The intermediate element 7 is not firmly connected to the securing element 3, but rather the securing element 3 can have a certain free-wheeling state relative to the intermediate element 7 and thus also relative to the actuation 6, i.e. the securing element 3 can move on the intermediate element 7 about the release axis V without the intermediate element 7 being moved along.This freewheel, however, is limited by two stops 7.1 arranged on the outer side of the intermediate element 7. The illustration of FIG. 6 d shows the intermediate element 7 in two different perspective side views, which show the two stops 7.1. The two stops 7.1 are spaced apart by approximately 180 degrees in the circumferential direction and they are thus located opposite each other with respect to the release axis V. The securing element 3 also has a stop or its receptacle 3.2 is designed such that a rotational movement of the securing element 3 relative to the intermediate element 7 is limited by the stops 7.1.In the securing position S, the stop of the securing element 3 abuts one of the stops 7.1, so that the securing element 3 can be rotated into the release position F by a rotation of the key or a rotation of the roller of the locking cylinder 6.1 about the release axis V. In this position, the pivot lever 2 can then be pivoted out of the trough 1, as has already been explained above. However, if the pivot lever 2 is already folded out of the trough 1 and the securing element 3 is in the securing position S, it is not necessary to first rotate it into the release position F before it is folded in. This is because when the securing element 3 comes into contact with the depression 1 during folding, the latter is rotated relative to the intermediate element 7 and thus also relative to the actuation 6 about the release axis V into a pre-tensioning position K. The actuation 6 does not move in this case. This movement can be limited by the second stop 7.1 of the intermediate element 7.In the pre-tensioning position K, the securing element 3 can pass through the depression 1 or the depression opening 1.4, so that the pivot lever 2 can be folded completely into the depression 1. When the pivot lever 2 has reached its end position and is fully folded into the depression 1, the securing element 3 can then latch behind the depression 1 and thus fix or secure the pivot lever 2 with respect to the depression 1. In order for the securing element 3 to latch behind the depression 1 accordingly, the securing element 3 is prestressed into the securing position S by means of the spring 5, which is designed as a torsion spring according to the illustration in FIG. 3. When the pivot lever 2 is folded in and when the depression 1 of the securing element 1 is in contact, the securing element is thus rotated away counter to the force of the spring 5, with the result that the spring 5 is tensioned. When the securing element 3 passes through the trough opening 1.4 and has thus overcome the trough 1, the spring 5 relaxes and the securing element 3 is automatically transferred into the securing position S. The spring 5 is also arranged concentrically to the release axis V and is connected on one side to the securing element 3 and on the other side to the mounting element 4 arranged fixed relative to the securing element 3.In order that the securing element 3 can be rotated from the securing position S into the prestressing position K when the pivot lever 2 is folded in and when it makes contact with the depression 1, the securing element 3 is designed as a rotationally movable helical catch in the embodiment shown in FIG. 3. For this purpose, the securing element 3 has a run-on contour 3.1, which is designed as a radial projection tapering in the circumferential direction. Due to the tapering or the flank of the radial projection functioning as a run-on slope, the securing element 3 escapes when in contact with the depression 1 and this is rotated about the release axis V into the prestress position K.On the side of the depression 1, a run-on contour 1.2 is likewise provided, which can be seen without the further components of the locking device 10 in the illustration of FIG. 6 a. This too is designed as a run-on slope or also has a run-on slope which is adapted to the run-on contour 3.1 of the securing element 3 in such a way that the securing element 3 rotates away from the pivot lever 2 when it is folded in, so that it can pass through the depression 1 or the depression opening 1.4 and then latch behind the latter.In order to connect the securing element 3 to the actuation element 6 in the axial direction, the actuation element 6 has, at its connecting section 6.3, a bore which is not visible in the representations on the basis of the perspective and into which a screw 8 can be screwed, which is shown in the exploded views of FIGS. 3 and 4. This screw 8 then holds the actuation 6 and the securing element 3 and thus also the further components of the securing assembly 9, i.e. the intermediate element 7 and the spring 5, together and secures these together on the mounting element 4.The illustration of FIG. 4 now shows a further exemplary embodiment which differs from the exemplary embodiment shown in the illustration of FIG. 3 substantially in that a tool actuation 6.2 is used as actuation 6 and that no intermediate element 7 is provided. In this embodiment, therefore, it is also not possible for the securing element 3 to rotate relative to the actuation 6, i.e. there is no free running of the securing element 3.The securing element 3 is prestressed into the securing position S via the spring 5, with the result that, owing to the direct rotational coupling of the securing element 3 and the actuation 6, the actuation 6 is correspondingly prestressed also into the securing position S. The actuation 6 is configured as a tool actuation 6.1 and is thus rotatable via a tool, such as a switchgear cabinet wrench. Since it is not possible in the case of the locking cylinder 6.1 to rotate the roller without a matching key, a corresponding freewheel in the manner described above is required in the embodiment according to FIG. 3. The tool actuation 6.1, on the other hand, can also be readily rotated by the securing element 3 about the release axis V, so that in this embodiment no freewheel is required and the actuation 6 and the securing element 3 are directly connected to one another.When the pivot lever 2 is folded into the trough 1 for securing purposes and the securing element 3 is rotated from the securing position S briefly into the prestressing position K, the actuation 6 rotates correspondingly as a result of the positive rotational coupling between the securing element 3 and the actuation 6. When the pivot lever 2 is then fully folded and is in the folded-in position E, the securing element 3 and thus also the actuation 6 are rotated, driven by the spring 5, back into the securing position S, in which the securing element 3 catches behind the depression 1 or the depression opening 1.4 and the pivot lever 2 is prevented from moving. With regard to the remaining components of the locking device 10 or of the securing assembly 9, reference is made to the above explanations.The example shown in the illustration of FIG. 5 now differs from the example according to FIG. 3 in terms of a differently configured intermediate element 7 and a differently configured securing element 3. First, the securing element 3 is again indirectly connected to the actuation 6 or to the rotatable connecting section 6.3 of the locking cylinder 6.1 and can be rotated back and forth about the release axis V via the actuation 6. The sequence during the release of the pivot lever 2 thus does not differ from that which has already been described above with reference to FIG. 3.Due to the use of a locking cylinder 6.1, a free wheel or a relative movement between the securing element 3 and the locking cylinder 6.1 or the actuation 6 is again provided, but the securing element 3 is now movable relative to the actuation 6 in a linear direction and thus radially with respect to the release axis V. Due to the linear movement, the spring 5 is therefore also not designed as a torsion spring, but as a spiral spring, as can be seen with reference to FIG. 5.The contact contour 3.1, which comes into contact with the depression 1 when the pivot lever 2 is folded in, is arranged at the outer end of the securing element 3. This is designed as a run-on slope, so that when the pivot lever 2 is folded in, the securing element 3 is moved linearly in the direction of the release axis V. The spring 5 is thereby tensioned and the securing element 3 is moved into the intermediate element 7. As a result, the securing element 3 or the securing assembly 9 can be guided through the trough opening 1.4 and, as soon as the pivot lever 2 has reached the folded-in position E, the securing element 3 can latch behind the trough 1. The spring 5 is relaxed and the securing element 3 is moved in a linear direction behind the depression 1.In order to allow a corresponding linear movement, the securing element 3 is not arranged concentrically with respect to the intermediate element 7, but rather the intermediate element 7 has a linear guide 7.3, which is designed as a lateral recess adapted to the securing element 3 with regard to the geometry. The securing element 3 can be moved back and forth in the linear guide 7.3. The spring 5 is arranged in the linear guide 7.3 behind the securing element 3, so that the spring 5 is tensioned or relaxed during a movement of the securing element 3.From a constructional point of view, the intermediate element 7 is bolt-shaped and rotatably mounted in the mounting element 4. Furthermore, the intermediate element 7 is secured in the axial direction in the mounting element 4, so that an additional screw 8 is not absolutely necessary for connecting the intermediate element 7 and the actuation 6.The securing element 3 is designed from a constructional point of view as a linearly movable helical catch in the embodiment according to FIG. 5. The securing element 3 has a substantially bolt-shaped geometry and can be moved along its longitudinal axis radially toward or away from the release axis V in a linear direction. For the rest, reference is made to the above explanations.In summary, the automatic movement of the securing element 3 when the pivot lever 2 is folded in allows very simple locking of the door. Due to the movement of the securing element 3 into the pre-tensioning position K, a push-to-lock function is created, so that no key is required for locking the door. Rather, the pivot lever 2 for locking the door simply has to be folded only into the trough 1. The pivot lever 2 is then reliably secured to the depression 1 via the securing element 3 and the latter can only be pivoted out of the depression 1 again via a key or a matching tool after the securing element 3 has been released and can then be rotated about the actuation axis B in order to unlock the door.Reference Number:1 Trough 1.1 Pivot lever holder 1.2 Contact contour 1.3 Closing shaft 1.4 Trough opening 2 Pivot lever 3 Securing element 3.1 Contact contour 3.2 Holder 4 Mounting element 5 Spring 6 Actuation 6.1 Locking cylinder 6.2 Tool actuation 6.3 Connecting section 7 Intermediate element 7.1 Stop 7.2 Holder 7.3 Linear guide 8 Screw 9 Securing assembly 10 Locking device B Actuation axis V Release axis W Pivot axis A Deployed position E Deployed position F Release position S Securing position K Prestress positionReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedDE 20 2011 052 355 U1

[0006]

Claims

Locking device for locking a closing element, in particular a door, having a depression (1), a pivot lever (2) which is mounted pivotably on the depression (1) and which, in a deployed position (A), is rotatable about an actuating axis (B) and, in a folded-in position (E), is locked in the depression (1) in a non-rotatable manner, and a securing element (3) which secures the folded-in pivot lever (2) against being folded out in a securing position (S), characterized in that the securing element (3) is designed as a latching latch which is spring-biased into the securing position (S).Locking device according to claim 1, characterised in that the securing element (3) and the depression (1) are designed in such a way that the securing element (3) latches behind the depression (1) for securing the pivot lever (2) when the pivot lever (2) is folded in.Locking device according to one of Claims 1 or 2, characterized in that the securing element (3) has a run-on contour (3.1), which prestresses the securing element (3) into a prestressing position (K) when the pivot lever (2) is folded into the depression (1).Locking device according to one of the preceding claims, characterized in that the securing element (3) is of annular configuration and the run-on contour (3.1) is configured as a radial projection which narrows in the circumferential direction.Locking device according to one of Claims 1 to 3, characterized in that the securing element (3) is designed in the form of a latch, and the run-on contour (3.1) is arranged at one end of the securing element (3).Locking device according to one of the preceding claims, characterized in that the securing element (3) can be rotated back and forth about a release axis (V) between a securing position (S) and a release position (F) by means of an actuation (6), wherein the pivot lever (2) can be pivoted out of the depression (1) in the release position (F).Locking device according to claim 6, characterised in that the actuation (6) has a locking cylinder (6.1), so that the securing element (3) can be rotated about the release axis (V) via a matching key.Locking device according to claim 6, characterised in that the actuation (6) comprises a tool actuation (6.2), so that the securing element (3) can be rotated about the release axis (V) via a tool.Locking device according to one of the preceding claims, characterized in that the securing element (3) is prestressed into the securing position (S) via a spring (5), wherein the spring (5) is designed as a torsion spring or wherein the spring (5) is designed as a helical spring, via which the securing element (3) is prestressed radially with respect to the release axis (V) into the securing position (S).Locking device according to one of Claims 6 to 9, characterized in that the securing element (3) is movable relative to the actuation (6).Locking device according to one of Claims 6 to 10, characterized in that the actuation (6) is connected to the securing element (3) via an intermediate element (7), wherein the intermediate element (7) is connected to the actuation (6) in a rotationally fixed manner, and wherein the securing element (3) is arranged so as to be relatively movable with respect to the intermediate element (7).Locking device according to claim 11, characterised in that the securing element (3) has at least one, in particular two, stops (3.3) and the intermediate element (7) has at least one, in particular two, stops (7.1), by means of which the relative movement of the securing element (3) with respect to the intermediate element (7) can be limited.Locking device according to one of claims 10 or 11, characterised in that the securing element (3) is linearly guided in the intermediate element (7).Locking device according to one of Claims 6 to 10, characterized in that the securing element (3) is fixedly connected to the actuation (6).Closing element, in particular door, having a locking device (10) according to one of the preceding claims.

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