Plug connector, system consisting of a plug connector and a cable, and system consisting of a plug connector and a plug connector receptacle

Abstract

The invention relates to a plug connector (1) having a plug connector housing, for connecting to a plug connector receptacle (5), wherein the plug connector (1) can be connected to a two-wire cable (3), wherein the two-wire cable (3) is designed to transmit data and / or power, and having a first contact element (6) and a second contact element (7), wherein the first contact element (6) can be connected to the first wire (23) and wherein the second contact element (7) can be connected to the second wire (24). The problem of specifying a plug connector which can be connected to a plug connector receptacle in a particularly safe and flexible manner is solved in that the first contact element (6) and the second contact element (7) are designed and arranged concentrically with respect to one another, and that the first contact element (6) and the second contact element (7) are mounted to rotate with respect to the plug connector housing.

Description

[0001] Connectors, systems consisting of a connector and a cable and systems consisting of a connector and a connector receptacle

[0002] The invention relates to a connector, in particular a two-pin connector, with a connector housing for connection to a connector receptacle.

[0003] The connector can be connected to a two-wire cable, wherein the two-wire cable is designed to transmit data and / or power.

[0004] Furthermore, the connector has a first contact element and a second contact element, wherein the first contact element can be connected to the first wire and wherein the second contact element can be connected to the second wire of the cable to be connected.

[0005] The invention also relates to a system comprising a connector according to the invention and a cable, wherein the cable is connected to the connector.

[0006] In addition, the invention relates to a system comprising a plug connector and a plug connector receptacle, wherein the plug connector is designed according to the invention, wherein the plug connector receptacle has a first receptacle contact element and a second receptacle contact element, wherein the first receptacle contact element is designed to receive the first contact element of the plug connector and wherein the second receptacle contact element is designed to receive the second contact element of the plug connector.

[0007] Various connectors for connecting two-wire cables are known from the state of the art. Especially when used in tight spaces, it is advantageous if the outlet direction of the cable connected to a device can be adjusted. Angle connectors are known, which feature a rotatable outlet for adjusting the outlet direction of the connected cable.

[0008] From the publication EP 1 424 750 A1 a connector with a rotatably mounted cable outlet is known.

[0009] The document EP 2 115 822 B 1 describes an angled connector for attachment to an aggregate housing with a plug housing and a housing flange partially overlapping the plug housing, which can be fastened to the aggregate housing in a rotationally secure manner, wherein the plug housing is rotatably fastened to the housing flange and can be rotated with rotational resistance relative to the housing flange to determine the outlet direction.

[0010] The utility model DE 20 2103 104 759 Ul also relates to a rotatably adjustable angle connector, wherein a plug part can be rotated relative to a flange part to determine the outlet direction.

[0011] In addition, the utility model DE 20 2004 010 287 Ul describes a multi-pole electrical connector with a plug part and with a rotatable electrical sliding contact for connecting the plug part.

[0012] When connecting two-pin connectors, attention must be paid to the connector's orientation. Mismating can be prevented, for example, by mechanical coding.

[0013] Based on the prior art described above, the object of the present invention is to provide a connector that can be connected to a connector receptacle particularly securely and flexibly. Furthermore, the object of the invention is to provide a system comprising a connector and a cable, as well as a system comprising a connector and a connector receptacle, that ensures a particularly secure and flexible connection.

[0014] According to a first teaching of the present invention, the object mentioned at the outset is achieved by a plug connector described at the outset in that the first contact element and the second contact element are designed and arranged concentrically to one another and that the first contact element and the second contact element are rotatably mounted relative to the plug connector housing.

[0015] The connector according to the invention has the advantage that the concentric arrangement prevents incorrect mating of the connector with incorrect polarity, and the rotatable arrangement of the contact elements ensures a particularly flexible arrangement of the connector. Due to the concentric design of the contact elements, the connector can be inserted into the connector receptacle in any orientation without the risk of incorrect polarity. Since mechanical coding of the connector connection is thus eliminated, the connector can be inserted into the connector receptacle particularly easily, even in tight spaces that may not be fully visible.Because the first contact element and the second contact element are rotatably mounted relative to the connector housing, the cable outlet of the connector can also be aligned appropriately when assembled.

[0016] The connector housing is made of metal or plastic, for example.

[0017] Particularly preferably, the contact elements are arranged in a carrier, and the connector housing is arranged on the carrier, wherein the connector housing and the combination of carrier and contact elements are mounted rotatably relative to one another. According to this embodiment, both the contact elements and the carrier are rotationally symmetrical.

[0018] According to an advantageous embodiment of the connector, the first contact element is designed as a pin contact element, and the second contact element is designed as a ring contact element. The ring contact element concentrically surrounds the pin contact element. According to this embodiment, both contact elements are rotationally symmetrical. When the contact elements are rotated, for example, to align the cable outlet, the electrical connection to the connector receptacle remains unchanged.

[0019] Particularly preferably, the first contact element has a first connection area via which the first wire can be connected to the contact element, and the second contact element has a second connection area via which the second wire can be connected to the second contact element, wherein the first connection area and the second connection area implement a transition from a wire guide arranged side by side to a concentric guide of the contact elements in the plug connector. According to this advantageous embodiment, the plug connector is therefore designed such that cables in which the individual wires are guided side by side and therefore not concentrically can be connected. The wires in the cable can be arranged parallel to one another or twisted together.

[0020] This makes the connector particularly suitable for connection to cables that implement differential data transmission or differential data transmission and simultaneous power transmission.

[0021] Data transmission can be carried out using one of the following protocols: Ethernet, CAN-BUS, ISOSPI, FDP-Link. This list is not exhaustive. Other protocols for digital data transmission are also suitable within the scope of the present invention.

[0022] SPE cables (Single Pair Ethernet cables) are particularly suitable for connecting to the connector. Designed for transmitting both data and power, SPE cables have the advantage of simultaneously providing power to end devices with just one twisted pair of wires, in addition to data transmission via Power over Data Line.

[0023] In combination with the connector according to the invention, an arrangement can be provided with which, on the one hand, a space-saving and cost-efficient connection is realized and, on the other hand, with which the described advantages of the concentric, rotatable arrangement of the contact elements are realized.

[0024] For example, the first connection area and / or the second connection area are designed as crimp connections. This design allows the wires of the cable to be connected to be crimped particularly easily onto the contact elements.

[0025] According to a further preferred embodiment, the connector housing is designed for positive and / or non-positive engagement in the connector receptacle. For example, the positive and / or non-positive connection can be designed as a bayonet connection, a latch, a locking device, a screw connection, or a clamp.

[0026] If the connection is designed as a bayonet connection, the connector housing is designed as a bayonet inner part or a bayonet outer part. Correspondingly, the connector receptacle has a bayonet outer part or a bayonet inner part.

[0027] If the connector housing is designed as a bayonet inner part, it preferably has at least one pin, more preferably at least two pins and particularly preferably at least three pins, which are designed to be received in the corresponding bayonet outer part.

[0028] According to a particularly preferred embodiment, the connector housing designed as a bayonet inner part has exactly three pins for receiving in the bayonet outer part of the connector receptacle. This embodiment ensures that the connector housing is fixed particularly well and securely in the connector receptacle.

[0029] The bayonet outer part of the connector receptacle has a corresponding number of guides for receiving the pins, corresponding to the design of the bayonet inner part.

[0030] The connector is designed, for example, as an angled connector. For this purpose, the connector has a cable outlet that forms an angle, in particular an angle of approximately 90°, to the longitudinal axis of the connector. It is also advantageous if the angle is less than 90°. Alternatively, the connector can have a cable outlet that forms an angle to the longitudinal axis of the connector that is greater than 90°, for example, between 100° and 150°.

[0031] For example, the cable outlet is molded around the cable. According to this design, the cable outlet is made, in particular, of plastic.

[0032] According to a further advantageous embodiment of the connector, the first contact element and the second contact element are mounted rotatably relative to the connector housing such that, in the plugged-in state, the first contact element and the second contact element, together with the connected cable and the cable outlet, can be continuously rotated about the longitudinal axis of the connector, or about the plugging direction of the connector. In particular, the first contact element and the second contact element can be rotated through any angle up to 360° and beyond in the connected state.

[0033] According to a further advantageous embodiment, the connector can have a shield to protect the electrical contact from interference fields.

[0034] According to a second teaching of the present invention, the object mentioned at the outset is achieved by a system described at the outset comprising a plug connector according to the invention, which is designed according to at least one of the previously described embodiments, and a cable, wherein the cable is connected to the plug connector, in that the cable has two wires for, preferably differential, data transmission and / or for transmitting power, wherein the wires are arranged next to one another or twisted together in the cable and wherein the first wire is connected to the first contact element and wherein the second wire is connected to the second contact element.

[0035] The system according to the invention has the advantage that a two-wire cable, whose wires are routed side by side or twisted together, can be connected to a connector receptacle by means of a connector with concentrically arranged contact elements that are also rotatably mounted. The concentric design of the connector advantageously prevents incorrect mating of the connector. Furthermore, the system according to the invention has the advantage that the rotatable positioning of the contact elements allows the connector and the cable to be correctly aligned even when plugged in.

[0036] According to a particularly preferred embodiment, the cable is configured for transmission according to one of the following protocols: Ethernet, CAN-BUS, ISOSPI, FDP-Link. This list is not exhaustive. Other protocols for digital data transmission are also suitable within the scope of the present invention.

[0037] The cable is specifically designed as an SPE cable for data and power transmission. This design, consisting of a connector and SPE cable, offers the advantage of simultaneously providing power to end devices with a single twisted pair of wires, while simultaneously requiring minimal space.

[0038] According to a third teaching of the present invention, the object set out at the outset is achieved by a system described at the outset comprising a plug connector and a plug connector receptacle in that the first receptacle contact element and the second receptacle contact element are formed and arranged concentrically to one another.

[0039] The first contact element and the first receiving contact element, as well as the second contact element and the second receiving contact element, can be connected to one another in such a way that, in the plugged-in state, the first contact element and the second contact element are rotatable, while maintaining electrical contact. In particular, in the connected state, the first contact element is rotatably arranged in the first receiving contact element, and the second contact element is rotatably arranged in the second receiving contact element.

[0040] With regard to the design of the connector, reference is made to all designs described above.

[0041] Particularly preferably, the contact elements are rotatably mounted in the connected state both relative to the connector housing and relative to the connector receptacle.

[0042] Optionally, the contact elements, together with the cable outlet, can be locked in the rotated position by a mechanical coding within the connector housing after rotation to the desired position, so that the cable outlet remains permanently in the rotated position. For example, the mechanical coding can comprise a snap-in connection; in particular, the mechanical coding can be designed as a rotating ring locking mechanism.

[0043] Particularly preferably, the first receiving contact element is designed as a contact tulip for receiving the first contact element designed as a pin contact element, and the second receiving contact element has at least two contact tongues for receiving the second contact element designed as a ring contact element. Particularly preferably, the second receiving contact element has three contact tongues.

[0044] When it is said that the contact tongues are formed concentrically to the contact tulip, it is meant that the contact tongues define a socket-like arrangement that is formed concentrically to the contact tulip.

[0045] When connected, the pin contact element is arranged in the contact tulip of the connector receptacle, and the ring contact element is arranged within the at least two contact tongues. This design ensures that the electrical connection is maintained when the pin contact element is rotated in the contact tulip and the ring contact element is rotated in the contact tongues.

[0046] According to a further advantageous embodiment of the system, the connection between the plug connector and the plug connector receptacle is designed as a bayonet lock, wherein the plug connector housing is designed as a bayonet inner part, and the plug connector receptacle has a plug connector receptacle housing that is designed as a bayonet outer part. The bayonet inner part has at least one pin, and the bayonet outer part has at least one guide for guiding the at least one pin. Particularly preferably, the bayonet inner part has more than one pin, and the bayonet outer part has a corresponding number of guides for the pins.

[0047] This design ensures that the connector can be fixed particularly securely to the connector receptacle via the bayonet lock.

[0048] A further embodiment of the system is characterized in that the first receiving contact element has a first receiving connection area on the side facing away from the plug connector and that the second receiving contact element has a second receiving connection area on the side facing away from the plug connector, wherein the receiving connection areas realize a transfer of a concentric arrangement into a side-by-side arrangement of the contacts or the conductors.

[0049] According to a further embodiment, the system comprises a sealing element that is arranged between the connector and the connector receptacle in the connected state. For example, the sealing element is designed as a sealing ring that is arranged, for example, in a recess in the connector receptacle or the connector.

[0050] The sealing element, in particular the sealing ring, is particularly preferably arranged between the plug connector and the plug connector receptacle in such a way that the sealing element is compressed by the connection of the plug connector and the plug connector receptacle, in particular by the bayonet connection, and thus seals the connection between the plug connector and the plug connector receptacle.

[0051] For example, the receiving contact elements are directly connected to a circuit board via the receiving connection areas.

[0052] If the connector receptacle is designed for connection to a device housing, it can be designed as a rear-panel screw connection. In this case, part of the connector receptacle forms a feedthrough through the housing.

[0053] Alternatively, the connector receptacle can also be connected, in particular screwed, to the outside of the device housing.

[0054] Furthermore, the invention also relates to a system comprising a connector according to the invention, which is connected to a cable, and a connector receptacle. Regarding the configurations of the connector, the cable, and the connector receptacle, reference is also made to all of the above statements.

[0055] There are now numerous possibilities for designing and developing the connector and systems according to the invention. Reference is made to the claims subordinate to the independent claims and to the following description of exemplary embodiments in conjunction with the drawings.

[0056] The drawing shows:

[0057] Fig. 1 shows an embodiment of a connector and a system comprising a connector and a connector receptacle,

[0058] Fig. 2 shows an embodiment of a system comprising a connector and a connector receptacle in the plugged-in state,

[0059] Fig. 3 shows a further embodiment of a system comprising a connector and a connector receptacle, wherein both the connector and the connector receptacle have no housing,

[0060] Fig. 4 shows an embodiment of a connector receptacle which is connected to a printed circuit board and

[0061] Fig. 5 shows a cross-section of a system consisting of a connector and a connector receptacle.

[0062] Fig. 1 shows an embodiment of a connector 1 and a system 2 comprising a connector 1 and a cable 3 and a system 4 comprising a connector 1 and a connector receptacle 5 in the unplugged state.

[0063] The connector 1 is connected to a two-wire cable 3, with the wires being twisted within the cable 3. In detail, the cable 3 shown is designed as an SPE cable. The wires of the cable are connected to the first contact element 6 and the second contact element 7 of the connector, with the first contact element 6 and the second contact element 7 being concentrically arranged in the connector 1.

[0064] Correspondingly, the plug connector receptacle 5 has a first receptacle contact element 8 and a second receptacle contact element 9, wherein the first receptacle contact element 8 is designed to receive the first contact element 6 and wherein the second receptacle contact element 9 is designed to receive the second contact element 7 and wherein the first receptacle contact element 8 and the second receptacle contact element are also arranged concentrically to one another.

[0065] The concentric arrangement has the advantage that incorrect mating cannot occur when plugging the connector 1 into the connector receptacle 5, so that a particularly secure electrical connection can be guaranteed.

[0066] Furthermore, the connector 1 has a connector housing 10, wherein the connector housing 10 is designed for positive connection to the connector receptacle 5, in particular to the connector receptacle housing 11.

[0067] In detail, the connector housing 10 is designed as a bayonet inner part 12 with three pins 13. Correspondingly, the connector receptacle housing 11 is designed as a bayonet outer part 14 with three guides 15 for receiving the pins 13 of the bayonet inner part 12.

[0068] The bayonet connection allows the connector 1 to be securely arranged and fixed in the connector receptacle 5, wherein, as described below, the contact elements 6 and 7 together with the carrier 25 (not shown here) and the cable outlet 16 can still be rotated and aligned.

[0069] The connector housing 10 and the combination of the contact elements 6 and 7 and the carrier 25 are mounted so as to be rotatable relative to one another, so that the contact elements 6 and 7 together with the cable 3 can be rotated about the longitudinal axis 26 of the connector 1 even in the plugged-in and fixed state, and the cable 3 or the angled cable outlet 16 can be subsequently aligned.

[0070] The illustrated arrangement of a connector 1 connected to a cable 3 and a connector receptacle 5 has the advantage that a twisted wire pair is converted into a concentric arrangement in the connector, thus preventing mismating the two-pole connection. Furthermore, the cable outlet 16 can be adjusted particularly flexibly, even when plugged in, thanks to the concentric design of the contact elements 6 and 7 and the rotatable mounting relative to the connector housing 10.

[0071] Furthermore, a sealing element 27 in the form of an O-ring is provided between the connector 1 and the connector receptacle 5, specifically in the connector receptacle housing 11 between the carrier 25 and the bayonet outer part 14. When the bayonet connection is closed, the O-ring is compressed, ensuring a tight connection between the connector 1 and the connector receptacle 5.

[0072] Fig. 2 shows the arrangement illustrated in Fig. 1, with the connector 1 inserted into the connector receptacle 5. In the illustrated embodiment, the connector receptacle is designed as a rear-wall screw connection. This means that part of the connector receptacle 5 forms a housing feedthrough through the device housing wall 17.

[0073] On the side facing away from the connector 1, the concentric receiving contact elements 8 and 9 have receiving connection areas 18 and 19 on a printed circuit board 20. This creates a new transition from a concentric arrangement of the receiving contact elements 8 and 9 to an arrangement in which the individual wires or contacts are again guided next to one another.

[0074] In the plugged-in state shown, the connected cable 3 is continuously adjustable together with the concentric contact elements arranged in the connector 1. The cable outlet 16 can therefore be aligned particularly flexibly even when plugged in.

[0075] Fig. 3 shows a further embodiment of a system comprising a connector 1, which is connected to a cable 3, and a connector receptacle 5, wherein the interior, in particular the contact elements 6 and 7 and the receptacle contact elements 8 and 9, are shown here.

[0076] The connector 1 has a first contact element 6, which is designed as a pin contact element. Furthermore, the connector 1 has a second contact element 7, which is designed as a sleeve-like ring contact, wherein the sleeve-like ring contact concentrically surrounds the pin contact.

[0077] Both the first pin contact and the second ring contact are rotationally symmetrical. Furthermore, the pin contact has a first connection area 21, and the ring contact has a second connection area 22, with a first wire 23 connected to the first connection area 21 and a second wire 24 connected to the second connection area 22. The two connection areas 21, 22 transform the adjacent arrangement of the wires 23, 24 into a concentric arrangement.

[0078] Corresponding to the design of the contact elements 6, 7, the first receiving contact element 8 is designed as a contact tulip and the second receiving contact element 9 has three contact tongues which form a socket-like receptacle for the ring contact element.

[0079] The contact elements of the connector 1 can therefore rotate or be continuously adjusted in the receiving contact elements 8, 9, while the electrical connection is maintained.

[0080] Fig. 4 shows an embodiment of a connector receptacle 5 connected to a printed circuit board 20. The connector receptacle 5 has receptacle contact elements 8, 9, which are connected to the printed circuit board 20 via receptacle connection areas 18, 19. The first receptacle contact element 8 is designed as a contact tulip, and the second receptacle contact element 9 comprises three contact tongues that form a socket-like receptacle for the ring contact of the connector 1.

[0081] Fig. 5 shows a cross-section of a system 4 comprising a connector 1 and a connector receptacle 5 in a state in which the connector 1 is arranged in the connector receptacle 5. Furthermore, the connector 1 is connected to a cable 3.

[0082] The illustration shows a first contact element 6 designed as a pin contact element, which is arranged in a first receiving contact element 8 designed as a contact tulip. Furthermore, a second contact element 7 designed as a ring contact element is arranged in a second receiving contact element 9, which comprises a plurality of contact tongues.

[0083] This connection area is surrounded by a connector housing 10 arranged on a carrier 25. The carrier limits, in particular, the movement of the connector housing 10 in the plugging direction by means of an annular collar. The connector housing is also held in place on the cable side by corresponding projections and recesses. In the plugged-in state, the carrier 25, together with the contact elements 6 and 7 and the cable outlet 16, is rotatable relative to the connector housing 10 and the connector receptacle 5.

[0084] The connector housing 10 is designed as a bayonet inner part 12, which is connected to a connector receptacle housing 11 designed as a bayonet outer part 14.

[0085] In the plugged-in state shown, the first contact element 6 and the second contact element 7 can be rotated together with the cable about the longitudinal axis 26 of the connector 1, so that the orientation of the cable outlet 16 can still be properly aligned even in the plugged-in state.

[0086] A sealing element 27 in the form of an O-ring is arranged between the connector 1 and the connector receptacle 5, specifically between the carrier 25 and the connector receptacle 5. When the bayonet connection is closed, the O-ring is compressed, ensuring a tight connection between the connector 1 and the connector receptacle 5. Reference numeral

[0087] 1 connector

[0088] 2 System of connector and cable

[0089] 3 cables

[0090] 4 System of connector and connector receptacle

[0091] 5 Connector receptacle

[0092] 6 first contact element

[0093] 7 second contact element

[0094] 8 first receiving contact element

[0095] 9 second receiving contact element

[0096] 10 connector housings

[0097] 11 Connector receptacle housing

[0098] 12 B aj onettiimenteil

[0099] 13 cones

[0100] 14 Baj onet outer part

[0101] 15 Guide

[0102] 16 cable outlet

[0103] 17 Device housing wall

[0104] 18 first reception connection area

[0105] 19 second recording connection area

[0106] 20 circuit board

[0107] 21 first connection area

[0108] 22 second connection area

[0109] 23 first vein

[0110] 24 second wire

[0111] 25 carriers

[0112] 26 Longitudinal axis of the connector

[0113] 27 Sealing element

[0114] 28

Claims

Patent claims 1. A plug connector (1) with a plug connector housing (10) for connection to a plug connector receptacle (5), wherein the plug connector (1) can be connected to a two-wire cable (3), wherein the two-wire cable (3) is designed to transmit data and / or power, and with a first contact element (6) and a second contact element (7), wherein the first contact element (6) can be connected to the first wire (23) and wherein the second contact element (7) can be connected to the second wire (24), characterized in that the first contact element (6) and the second contact element (7) are designed and arranged concentrically to one another and that the first contact element (6) and the second contact element (7) are rotatably mounted relative to the plug connector housing (10).

2. Connector (1) according to claim 1, characterized in that the first contact element (6) is designed as a pin contact element and that the second contact element (7) is designed as a ring contact element.

3. Plug connector (1) according to claim 1 or 2, characterized in that the first contact element (6) has a first connection area (21) via which the first wire (23) can be connected to the contact element (6) and that the second contact element (7) has a second connection area (22) via which the second wire (24) can be connected to the second contact element (7), wherein the first connection area (21) and the second connection area (22) realize a transition from a wire guide arranged next to one another into a concentric guide of the contact elements (6, 7) in the plug connector (1).

4. Connector (1) according to one of claims 1 to 3, characterized in that the connector housing (10) is designed for positive and / or non-positive reception in the connector receptacle (5), wherein the connection to the connector receptacle (5) is designed in particular as a bayonet connection.

5. Connector (1) according to claim 4, characterized in that the connector housing (10) is designed as a bayonet inner part (12), wherein the bayonet inner part (12) has at least one pin (13), more preferably at least two pins (13) and particularly preferably at least three pins (13), which are designed to be received in a corresponding bayonet outer part (14).

6. Connector (1) according to one of claims 1 to 5, characterized in that the connector (1) is designed as an angle connector, wherein the connector (1) has a cable outlet (16) which has an angle, in particular an angle of approximately 90°, to the longitudinal axis (26) of the connector (1).

7. Connector (1) according to claims 1 to 6, characterized in that the first contact element (6) and the second contact element (7) are mounted rotatably relative to the connector housing (10) in such a way that the first contact element (6) and the second contact element (7) in the plugged-in state can be rotated continuously about the longitudinal axis (26) of the connector (1) together with the connected cable (3) and the cable outlet (16).

8. System (2) comprising a connector (1) according to one of claims 1 to 7 and a cable (3), wherein the cable (3) is connected to the connector (1), characterized in that the cable (3) has two wires (23, 24) for, preferably differential, data transmission and / or for transmitting power, wherein the wires (23, 24) are arranged next to one another or twisted together in the cable (3), and wherein the first wire (23) is connected to the first contact element (6) and wherein the second wire (24) is connected to the second contact element (7).

9. System (2) according to claim 8, characterized in that the cable (3) is designed as an SPE cable which has a twisted pair of wires for differential data transmission and simultaneously for the transmission of power.

10. System (4) comprising a plug connector (1) and a plug connector receptacle (5), wherein the plug connector (1) is designed according to one of claims 1 to 7, wherein the plug connector receptacle (5) has a first receptacle contact element (8) and a second receptacle contact element (9), wherein the first receptacle contact element (8) is designed to receive the first contact element (6) of the plug connector (1) and wherein the second receiving contact element (9) is designed to receive the second contact element (7) of the plug connector (1), characterized in that the first receiving contact element (8) and the second receiving contact element (9) are designed and arranged concentrically to one another.

11. System (4) according to claim 10, characterized in that the contact elements (6) and (7) are rotatably mounted in the connected state both with respect to the connector housing (10) and with respect to the connector receptacle (5).

12. System (4) according to claim 10 or 11, characterized in that the first receiving contact element (8) is designed as a contact tulip for receiving the first contact element (6) designed as a pin contact element and that the second receiving contact element (9) has at least two contact tongues for receiving the second contact element (7) designed as a ring contact element.

13. System (4) according to one of claims 10 to 12, characterized in that the connection between the plug connector (1) and the plug connector receptacle (5) is designed as a bayonet lock, wherein the plug connector housing (10) is designed as a bayonet inner part (12) and that the plug connector receptacle (5) has a plug connector receptacle housing which is designed as a bayonet outer part (14), wherein the bayonet inner part (12) has at least one pin (3) and wherein the bayonet outer part (14) has at least one guide (15) for guiding the at least one pin (3).

14. System (4) according to one of claims 10 to 13, characterized in that the first receiving contact element (8) has a first receiving connection area (18) on the side facing away from the plug connector (1) and that the second receiving contact element (9) has a second receiving connection area (19) on the side facing away from the plug connector (1), wherein the receiving connection areas (18, 19) realize a conversion of a concentric arrangement into a side-by-side arrangement of the contacts.

15. System (4) according to one of claims 10 to 14, characterized in that a sealing element (27), in particular a sealing ring, is arranged between see the connector (1) and the connector receptacle (5) is arranged such that the sealing element (27) is compressed by the connection of the connector (1) and the connector receptacle (5) and thus seals the connection.

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