System with locking element

Abstract

A system (1), comprising; - a first element (3) and a second element (5), wherein the first element (3) has a connector section (31) for connection with the second element (5); and - a locking element (7) which is designed to hold the first element (3) and the second element (5) in a connected position in a mutually locked position; wherein the locking element (7) is designed to be spring-elastic and can be arranged at least partially on the connector section (31) of the first element (3), and wherein a first section (71A) of the locking element (7) can be arranged axially displaceable at least partially along the connector section (31) of the first element (3) against a spring force of the locking element (7) between the locked position and an unlocked position.

Description

[0001] The invention relates to a system according to the preamble of claim 1.

[0002] Such a system includes: - a first element and a second element, the first element having a connector section for connecting to the second element; and - a locking element designed to hold the first element and the second element in a connected position in a mutually locked position.

[0003] Such systems are used for separating and connecting components. These components can be flange-to-socket connections and / or plug-in connectors. For example, such a system can be used to connect electrical cables, optical transmission lines, or fluid lines. The two components are aligned and connected by positive locking, and the locking element securely and releasably holds them in the locked position. Depending on the specific application, components are either released using a tool or by the user's finger.

[0004] Such a system is described in EP 2 957 000 B1. The elements described as plug connectors and mating connectors are detachably lockable to each other with a locking element based on the push-pull principle. DE 10 2005 001 939 B4 and EP 2 777 096 B2 describe systems with locking by means of a spring arm or a leaf spring, respectively.

[0005] However, systems known from the prior art have the disadvantage that they can often only be locked and unlocked through complicated and unintuitive handling. Due to their complex design, there is often an increased risk of injury to the user when unlocking, while locking requires a high counter-holding force. Furthermore, in systems known from the prior art, there is often an undesirable correlation between the locking and unlocking forces and the moisture content of the plastic material from which the system components are made. In addition, unlocking often requires a specific tool that the user must carry specifically for this purpose.

[0006] The object of the present invention is to provide a system that enables easy locking and unlocking, as well as improved handling, and furthermore fulfills the safety features according to the VDE (Association for Electrical, Electronic & Information Technologies) with regard to unlocking.

[0007] This problem is solved by an object having the features of claim 1.

[0008] Accordingly, it is provided that the locking element is spring-elastic and can be arranged on the connector section of the first element, and wherein a first section of the locking element can be arranged axially displaceable at least in certain areas along the connector section of the first element against a spring force of the locking element between the locked position and an unlocked position.

[0009] The locking element can be designed as a separate element from the first element and is arranged in a mounted position on the connector section, in particular on the circumference of the connector section, of the first element, and the first section of the locking element is arranged to be axially displaceable, at least in some areas, along the connector section of the first element against a spring force of the locking element between the locked position and an unlocked position, or to move into the locked position.

[0010] The locking element can be made of a spring-elastic and electrically insulating plastic or rubber material, or alternatively, a steel or copper alloy. The locking element can be designed, for example, as a spring ring or a spring-like structure. It can extend in a ring-like shape or along a circular arc around a centrally aligned hole, and be open at one point. For example, the central angle of the circular arc can be less than 360°. In one example, the central angle of the open locking element can be in the range of 180° to 270°. Furthermore, the first section of the locking element can be bent upwards in the axial direction or arranged axially on a plane different from the plane on which a second section opposite the first is located.When the locking element is deformed or compressed, a kind of spring can be formed to generate a so-called axial spring force.

[0011] The centrally located hole in the locking element allows the connector section of the first element, for example a cylindrical one, to pass through, and the locking element can extend along the circumference of the connector section. For example, the locking element can run in a groove in the material of the first element, and the first section of the locking element can only move axially within the groove. The groove can run perpendicular to the axial direction of the connector section.

[0012] The first section of the locking element can be in the locked position in an axially extending position and without the influence of an external force, resisting the spring force or compression. In the locked position, the locking element, or rather the first section of the locking element, holds the first and second elements locked together. For example, a locking element can be arranged on the first section of the locking element, which engages in an opening in the second element to lock it to the first element.

[0013] By applying an external force to the first section, or by compressing the locking element, the locking element is moved into the unlocked position, or the engagement is released, and the first element and the second element can be separated from each other.

[0014] This provides a system with a locking element that deflects with virtually no force when locking and locks automatically in the locked position. Depending on the intended use, it can be unlocked manually or with a tool by deflecting or compressing the first section of the locking element.

[0015] The first element can also be referred to as a first connecting element, and the second element can be referred to as a second connecting element corresponding to the first connecting element. In one embodiment, the elements are configured as connectors or as components of connectors. In another embodiment, the elements are configured as a flange element and a corresponding sleeve element.

[0016] In one embodiment, the first section of the locking element is adapted to be axially displaced from an origin position along the connector section of the first element by connecting the first element and the second element, and to return to the origin position automatically upon reaching the locked position, in particular to return to the origin position in a spring-like manner, for locking the first element and the second element.

[0017] The initial position can be understood as the position of the first section in which it is located without the influence of an external force, resisting the spring force of the locking element. When the first and second elements are connected, the first section can be axially displaced along the connector section by the locking element compressing it. Upon reaching the locked position, when the second element no longer acts upon the first section, the spring force automatically returns the first section to its initial position, allowing it to lock with the second element. In particular, this locking can be understood as a latching action.For this purpose, when the first section returns to its original position, a locking element on the first section can be inserted into a corresponding locking recess in the second element to lock or latch the first and second elements.

[0018] In one embodiment, the first element and the second element are designed to be rotatably connected to each other by means of a plug.

[0019] To connect the first and second elements, or to bring them into the connected position, the connector section of the first element can first be inserted, at least partially, into a corresponding connector section. Then, the first and second elements can be rotated relative to each other about an axis parallel to an axis or insertion direction. For example, to connect them, the first and second elements can be rotated relative to each other at a 90° angle, or at a smaller angle, to quickly join them.

[0020] In one embodiment, the first element has at least one leg which, when the first and second elements are rotatably connected, can be inserted into a corresponding undercut in the second element. In particular, the first element has a plurality of legs, each of which can be inserted into one of a plurality of corresponding undercuts.

[0021] By incorporating legs into undercuts, a mechanically stable connection can be created between the first element and the second element.

[0022] In one embodiment, the locking element is designed as a spring ring or as a spring-like element.

[0023] By means of a spring-like design, the locking element can be provided with the operating principle of a coil spring and can easily absorb loosening and over-tightening torques and spring back to its original position after unlocking.

[0024] In one embodiment, the locking element and the connector section of the first element have at least one corresponding pair of retaining elements adapted to block movement of the locking element around the circumference of the connector section.

[0025] Through the interaction of the retaining elements of the retaining element pair, the locking element can be held in a stationary position on the circumference of the connector section, so that it cannot be moved circumferentially, radially, around the circumference of the connector section.

[0026] In one embodiment, the locking element and the connector section of the first element have two pairs of retaining elements, wherein a first pair of retaining elements is adapted to hold the first section of the locking element axially displaceable on the circumference of the connector section of the first element, and a second pair of retaining elements is adapted to block axial movement of a second section of the locking element.

[0027] Both pairs of retaining elements hold the locking element on the connector section in a position that prevents it from moving circumferentially, or in a direction transverse to the axial or insertion direction, around the circumference of the connector section. However, the first pair of retaining elements is adapted to the first section of the locking element, which is axially displaceable along the connector section of the first element against a spring force of the locking element, in order to keep the first section axially displaceable. Such a connection can be achieved, for example, by designing the first pair of retaining elements as a tongue-and-groove joint extending in the axial direction. Using such a tongue-and-groove joint, the locking element can be moved axially along the groove, but not transversely to the axial direction.

[0028] The second pair of retaining elements is designed to block radial and axial movement of the second section of the locking element. Such a connection can be achieved, for example, by incorporating a retaining pin into the second pair of retaining elements, which can be inserted into a retaining opening.

[0029] By such a design, the locking element can be held axially movable but radially immovable on the connector section with the first section, and axially and radially immovable on the connector section with the second section.

[0030] In one embodiment, the two pairs of retaining elements are arranged on the locking element and the connector section. Such an arrangement ensures a reliable connection of the locking element to the connector section. For example, the two pairs of retaining elements can be arranged opposite each other on the locking element and the connector section.

[0031] In one embodiment, the locking element has at least one locking element which is arranged on the first section and which is adapted to engage in a corresponding locking recess of the second element in the locked position, for locking the first element and the second element when the first element is in a connected position with the second element.

[0032] The locking element is arranged on the first section of the locking element and is axially movable, or displaceable, with the first section against the spring force of the locking element between the locked and unlocked positions. The locking element can be pin-shaped to engage in the corresponding locking recess of the second element. In the locked position thus created, the connection between the first and second elements cannot be released, for example, by a rotational movement of the first element relative to the second element.

[0033] When the first element and the second element are rotatably connected, the locking element can be automatically inserted into the locking recess of the second element in one step together with the connection or the transfer into the connected position, thus locking the first element and the second element together.

[0034] In one embodiment, the second element has a clearance or opening in the material of the second element, in particular a tool opening for a tool or a finger opening for a user's finger, for inserting a tool or finger and for axially displacing the locking element along the connector section of the first element against the spring force of the locking element between the locked position and the unlocked position when the first element is in a connected position with the second element.

[0035] The opening allows the user to easily act on the locking element with a finger or a tool, or to press it, to move it from the locked position to the unlocked position.

[0036] In one embodiment, the locking element has an actuation surface. For example, when the first element is connected and locked to the second element, the actuation surface is located in the clearance or opening.

[0037] The locking recess can extend into the opening of the second element, or the locking recess and the opening can be designed together. The user can press directly on the locking element to move it directly and reliably from the locked position to the unlocked position.

[0038] In one embodiment, the locking element has at least one further locking element which is arranged adjacent to the locking element on the first section of the locking element and which is adapted to engage in a further corresponding locking recess of the second element in the locked position, for locking the first element and the second element when the first element is in a connected position with the second element.

[0039] By using a second locking element, a particularly reliable and secure locking mechanism can be achieved between the first element and the second element.

[0040] In one embodiment, the first and second elements are designed as circular connectors. The first element can therefore also be referred to as a connector, and the second element can be referred to as a mating connector. The connector and the mating connector can be included in a connector system.

[0041] The underlying concept of the invention will be explained in more detail below with reference to the embodiment shown in the figures. The figures show: Fig. 1A - 1C a front view, a rear view and a side view of a system with a first element, a second element and a locking element in an unconnected position; Fig. 2 a view of a second element according to the Fig. 1A - 1C; Fig. 3A and Fig. 3B Views of the first element with the locking element arranged therein according to the Fig. 1A - 1C in the locked position and the unlocked position; Fig. 4A and Fig. 5A Side views of the first element with the locking element attached to it and the second element aligned with it; and Fig. 4B and Fig. 5B Cross-sectional views of the system according to the Fig. 4A and Fig. 5A according to the one in the Fig. 4A and Fig. 5A drawn cross-sectional planes AA and BB.

[0042] The Fig. Figures 1A-1C show a system 1 with a first element 3, a second element 5, and a locking element 7 in a disconnected position, or an exploded view of the system 1. In this case, the first element 3 is configured as a plug, and the second element 5 is configured as a socket, although a reverse configuration would be equally conceivable, as would a configuration as a plug and socket. Furthermore, a general configuration is also conceivable in which the elements are configured as any components that can be connected to each other via a flange-sleeve connection.

[0043] The first element 3 can be plugged into the second element 5 along an axis A, which can also be referred to as the insertion direction, to establish a connection between the respective connected conductors (not shown here). The first element 3 has a connector section 31 for connection with a corresponding connector section 51 of the second element 5. To move into the connected position, the connector section 31 of the first element 3 is inserted into the connector section 51 of the second element 5 until it reaches a stop, and then the first element 3 and the second element 5 are rotated relative to each other about an axis parallel to axis A. To connect them, the first element 3 and the second element 5 are rotated relative to each other at a small angle of up to 10° to join them.In this case, the first element 3 has three legs 33A - 33C, each of which can be inserted into one of the three corresponding undercuts 53A - 53C in the second element 5. However, the first element 3 can also have only one leg, which can be inserted into a corresponding undercut.

[0044] The Fig. Figures 1A - 1C further show a locking element 7 which is designed to hold the first element 3 and the second element 5 in a connected position in a mutually locked position.

[0045] For this purpose, the locking element 7 is spring-like, i.e., curved, or ring-shaped, for example C-shaped, and spring-elastic, and can be arranged on a circumference of the connector section 31 of the first element 3, as shown in the Fig. 3, Fig. 4 and Fig. 5 shown.

[0046] A first section 71A of the locking element 7 is arranged to be axially displaceable, at least in part, along the connector section 31 of the first element 3 against a spring force of the locking element 7 between a locked position and an unlocked position. In this case, the first section 71A is located at a first end region of the locking element 7, which is opposite a second section 71B, which is arranged at a second end region of the locking element 7.

[0047] The locking element 7 shown is made of a spring-like, elastic, and electrically insulating plastic material. For this purpose, the locking element 7 has a ring-like shape and runs along a circular arc around a centrally aligned hole. The locking element 7 shown is open at one point. The central angle of the open locking element 7 can be in a range of 180° to 270°. However, designs with smaller or larger central angles are conceivable. Furthermore, the side view of Fig. 1C shows that the first section 71A of the spring-elastic locking element 7 is bent upwards in the axial direction A, or is arranged in the axial direction A on a plane that is different from a plane on which the second section 71B opposite the first section 71A is arranged. For this purpose, as shown in the Fig. Figure 1C shows a stepped section 73 arranged along the spring-like locking element 7. Alternatively, the spring-like locking element 7 can also have a continuous slope between the first section 71A and the second section 71B. When deformed or compressed, a type of spring is thus formed.

[0048] With the locking element 7 mounted on the first element 3, which is in the Fig. As shown in Figures 3-5, the locking element 7 runs in a groove-like recess, which is referred to herein as groove 35. The groove 35 extends into the material of the first element 3. The first section 71A of the locking element 7 moves in the axial direction A only within the groove 35. For this purpose, the groove 35 shown widens accordingly in the area of ​​the first section 71A to allow movement of the first section 71A between the locked and unlocked positions.

[0049] To arrange the locking element 7 on the connector section 31 of the first element 3, corresponding retaining element pairs 77A, 37A and 77B, 37B are arranged on the locking element 7 and the connector section 31.

[0050] Through the interaction of the retaining elements 77A, 37A, 77B, 37B of the retaining element pairs 77A, 37A and 77B, 37B, the locking element 7 can be held in a stationary position on the circumference of the connector section 31 in the groove 35, so that it cannot be moved circumferentially, radially, around the circumference of the connector section 31.

[0051] The first retaining element pair 77A, 37A is adapted to hold the first section 71A of the locking element 7 axially displaceable on the circumference of the connector section 31 of the first connector 3 and the second retaining element pair 77B, 37B is adapted to block an axial movement of the second section 71B of the locking element 7.

[0052] Both pairs of retaining elements 77A, 37A and 77B, 37B hold the locking element 7 on the connector section 31 in a position such that it cannot be moved circumferentially, or in a direction transverse to the axial direction, around the circumference of the connector section 31. However, the first pair of retaining elements 77A, 37A is adapted to the first section 71A of the locking element 7 to allow axial displacement of the first section 71A. For this purpose, as shown in the Fig. 1A and Fig. As shown in Figure 1B, the first retaining element pair 77A, 37A is implemented as a tongue-and-groove connection, which allows the first section 71A of the locking element 7 to be moved in the axial direction A in the groove 35, but not transversely to the direction of the groove, or transversely to the axial direction A. As shown in the Fig. As shown in Figure 1C, the spring-like web of the retaining element 37A of the first retaining element pair 77A, 37A is shown to be tapered in its course in the opposite direction to the second element 5, or rather, exhibits a taper. The retaining element 37 designed in this way can absorb differential torques when the two elements 3, 5 are locked by means of the locking element 7.

[0053] The second retaining element pair 77B, 37B is adapted to block radial and axial movement of the second section 71B of the locking element 7. For this purpose, the second retaining element pair 77B, 37B is implemented as a retaining pin on the locking element 7, which can be inserted into a retaining opening on the connector section 31 (shown in Fig. 5B). As shown, the two pairs of retaining elements 77A, 37A and 77B, 37B are arranged opposite each other, i.e. offset by 180°, on the locking element 7 and the connector section 31.

[0054] To lock the first element 3 and the second element 5, the locking element 7 has a locking element 75A, which is arranged on the first section 71A and which, in the locked position, is adapted to a corresponding locking recess (shown in Fig. 2) to engage the second element 5 to lock the first element 3 and the second element 5 when the first element 3 is in a connected position with the second element 5.

[0055] The locking element 75A is engaged with the first section 71A against the spring force of the locking element 7 in the locked position (shown in Fig. 3A) and the unlocked position (shown in Fig. 3B) movable or displaceable in axial direction A. The locking element 75A is pin-shaped to engage in the corresponding locking recess (shown in Fig. 2) to engage the second element 5. In the locked position thereby produced (shown in Fig. 3A) the connection between the first element 3 and the second element 5 cannot be broken by a rotational movement of the first element 3 relative to the second element 5.

[0056] To unlock the connection, the second element 5 has an opening 55 through which a user's finger or a tool can be inserted to move the first section 71A of the locking element 7 from the locked position to the unlocked position against the spring force of the locking element 7. By rotating the first element 3 relative to the second element 5 in the unlocked position in the opposite direction to the rotational direction, the first element 3 can be separated from the second element 5.

[0057] As in the Fig. 1A and Fig. As shown in Figure 1B, the locking element 75A has an actuating surface 751A which, when the first element 3 is connected to the second element 5 and locked, is located in the opening 55. Through this opening 55, the user can directly press on the actuating surface 751 of the locking element 75A to move it directly from the locked position to the unlocked position.

[0058] In this case, the locking element 7 has a further locking element 75B, which is arranged adjacent to the locking element 75A on the first section 71A of the locking element 7. When the first section 71A is moved from the locked position to the unlocked position, the further locking element 75B moves together with the locking element 75A. In the locked position, the further locking element 75B engages in a further corresponding locking recess of the second element 5 (shown in Fig. 2).

[0059] The Fig. Figure 2 shows a view of a second element 5 according to the Fig. 1A - 1C. In the Fig. Figure 2 shows the three undercuts 53A - 53C in the second element 5, into which one of the three legs can be inserted. Also shown are the locking recess 57A and the adjacent further locking recess 57B, for inserting the pin-like recesses of the locking element and the further locking element of the locking element (not shown).

[0060] The Fig. 3A and Fig. Figure 3B shows views of the first element 3 with the locking element 7 arranged therein, according to the Fig. 1A - 1C in the locked position and the unlocked position.

[0061] In the Fig. In position 3A, the first section 71A of the locking element 7 is in the locked position. Without any external force acting on the actuating surface 751A of the locking element 75A, the first section 71A is spaced axially A away from the second section. The locking element 7, or rather the locking elements 75A and 75B on the first section 71A of the locking element 7, hold the first element 3 and the second element (not shown) in the locked position.

[0062] By applying an external force to the locking element 75A and / or to the first section 71A, or by compressing the locking element 7, the locking element 7 is forced into the position indicated in Fig. The unlocked position shown in 3B is transferred, or the engagement is released, and the first element 3 and the second element (not shown) can be separated from each other. In this case, the first retaining element pair 77A, 37A, implemented as a tongue-and-groove connection, allows the first section 71A of the locking element 7 to be displaced axially A in the groove 35 when the locking element 7 is compressed, so that the first section 71A and the second section 71B of the locking element are moved towards each other.

[0063] The Fig. 4A and Fig. Figure 5A shows side views of the first element 3 with the locking element 7 attached to it and the second element 5 aligned with it. Fig. 4B and Fig. Figure 5B shows cross-sectional views of system 1 according to the Fig. 4A and Fig. 4B corresponding to the cross-sectional planes AA and BB shown in Figures 4A and 5A.

[0064] In the Fig. 4A and Fig. In 5A, the locking element 7 is arranged on the first element 3. However, for the sake of clarity, the second element 5 is shown at a distance from the first element 3.

[0065] In Fig. 4A, the first element 3 and the second element 5 are aligned without being rotated relative to each other, and the cross-sectional plane AA runs through the first section 71A of the locking element 7 transversely to the axis direction A. The in Fig. The cross-sectional view shown in 4B shows an arrangement of the three legs 33A - 33C and the corresponding undercuts 53A - 53C, as well as the locking elements 75A, 75B of the locking element 7.

[0066] In Fig. 5A shows the first element 3 and the second element 5 rotated relative to each other, or in a position where the first element 3 and the second element 5 can be inserted into each other in the axial direction A up to a stop and then into the Fig. 4A and Fig. The positions shown in 4B can be rotated relative to each other. The cross-sectional plane BB runs through the second section 71B of the locking element 7 transversely to the axial direction A.

[0067] Furthermore, in the Fig. Figure 5B shows the second retaining element pair 77B, 37B, which is adapted to block radial and axial movement of the second section 71B of the locking element 7. For this purpose, the second retaining element pair 77B, 37B is implemented as a retaining pin on the locking element 7, which is inserted into a retaining opening on the connector section 31. Reference symbol list 1 system 3 First element 31 Connector section 33A-33C Leg 35 Nut 37A, 37B Holding element 5 Second Element 51 Connector section 53A-53C undercut 55 Opening 57A, 57B Blocking exemption 7 Locking element 71A, 71B first, second section Paragraph 73 75A, 75B Locking element 751A Actuating surface 77A, 77B Holding element Axial direction QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] EP 2 957 000 B1

[0004] DE 10 2005 001 939 B4

[0004] EP 2 777 096 B2

[0004]

Claims

[1] System (1), comprising: - a first element (3) and a second element (5), wherein the first element (3) has a connector section (31) for connection with the second element (5); and - a locking element (7) which is designed to hold the first element (3) and the second element (5) in a connected position in a mutually locked position; characterized by , that the locking element (7) is designed to be spring-elastic and can be arranged at least partially on the connector section (31) of the first element (3), and wherein a first section (71A) of the locking element (7) can be arranged axially displaceable at least partially along the connector section (31) of the first element (3) against a spring force of the locking element (7) between the locked position and an unlocked position. [2] System (1) according to claim 1, characterized by, that the first section (71A) of the locking element (7) is adapted to be axially displaced from an origin position along the connector section (31) of the first element (3) by connecting the first element (3) and the second element (5), and to return to the origin position automatically upon reaching the locked position, in particular to return to the origin position in a spring-like manner, to lock the first element (3) and the second element (5). [3] System (1) according to any one of the preceding claims, characterized by , that the first element (3) and the second element (5) are designed to be rotatably connected to each other. [4] System (1) according to any of the preceding claims, characterized by, that the first element (3) has at least one leg (33A-33C) which can be inserted into a corresponding undercut (53A-53C) in the second element (5) when the first element (3) and the second element (5) are rotatably connected, in particular the first element (3) has a plurality of legs (33A-33C) which can each be inserted into one of a plurality of corresponding undercuts (53A-53C). [5] System (1) according to any one of the preceding claims, characterized by , that the locking element (7) is designed as a spring ring or as a spring-like element. [6] System (1) according to any one of the preceding claims, characterized by, that the locking element (7) and the connector section (31) of the first element (3) have at least one corresponding retaining element pair (37A, 77A) adapted to block movement of the locking element (7) around the circumference of the connector section (31) of the first element (3). [7] System (1) according to any of the preceding claims, characterized by two pairs of retaining elements (37A, 77A, 37B, 77B), wherein a first pair of retaining elements (37A, 77A) is adapted to hold the first section (71A) of the locking element (7) axially displaceable on the circumference of the connector section (31) of the first element (3), and a second pair of retaining elements (37B, 77B) is adapted to block an axial movement of a second section (71B) of the locking element (7). [8] System (1) according to claim 7, characterized by, that the two pairs of retaining elements (37A, 77A, 37B, 77B) are arranged on the locking element (7) and the connector section (31). [9] System (1) according to any of the preceding claims, characterized by , that the locking element (7) has at least one locking element (75A) which is arranged on the first section (71A) and which is adapted to engage in a corresponding locking recess (57A) of the second element (5) in the locked position, to lock the first element (3) and the second element (5) when the first element (3) is in a connected position with the second element (5). [10] System (1) according to any one of the preceding claims, characterized by, that the second element (5) has a clearance or an opening (55), in particular a tool opening for a tool, or a finger opening for a user's finger, in the material of the second element (5), for axially displacing the locking element (7) along the connector section (31) of the first element (3) against the spring force of the locking element (7) between the locked position and the unlocked position when the first element (3) is in a connected position with the second element (5). [11] System (1) according to claim 9 or 10, characterized by , that the locking element (75A) has an actuating surface (751A). [12] System (1) according to any one of claims 9 to 11, characterized by, that the locking element (7) has at least one further locking element (75B) which is arranged adjacent to the locking element (75A) on the first section (71A) of the locking element (7) and which is adapted in the locked position to engage in a further corresponding locking recess (57B) of the second element (5) to lock the first element (3) and the second element (5) when the first element (3) is in a connected position with the second element (5). [13] System (1) according to any of the preceding claims, characterized by , that the first element (3) and the second element (5) are designed as circular connectors.

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