CONNECTOR ARRANGEMENT FOR ELECTRICALLY CONNECTING TWO CABLES

Description

Technical field

[0001] The invention relates to a connector arrangement for detachably connecting electrically conductive cables, in particular high-frequency cables, to an electrical component. State of the art

[0002] Due to the increasing digitalization of components and systems and the associated increase in the amount of data to be transmitted, ever greater demands are being placed on the cables required for transmission. In particular, consistently high signal transmission quality across wide frequency ranges, with low attenuation or at least constant attenuation across the relevant frequency range, is playing an increasingly central role in the transmission of large amounts of data.

[0003] To meet these requirements, high-frequency cables, such as coaxial cables, are used. The coaxial arrangement of the inner conductor, dielectric, and shielding can largely ensure high signal transmission quality with low attenuation and low susceptibility to interference, provided the coaxial structure and the associated characteristic impedance remain largely constant over the entire length of the electrical cable. However, the cable ends, where connector systems are usually attached, are often problematic. These are the ends of the cable that electrically and communicatively connect the cable to the components or other cables between which data transmission is to take place.

[0004] However, such connection systems, which can be designed as plug-in couplings, for example, have the disadvantage that a constant characteristic impedance is very difficult to achieve, especially at the connection point, because tolerances, for example, can leave an air gap at the connection point between the two connection partners, which can negatively impact the return loss and thus the transmission quality. At the same time, however, the connection system must have a geometry that minimizes the risk of damage to the often very delicate cable ends during the connection process or normal cable operation.

[0005] EP 0 006 343 A1 discloses a connector assembly according to the preamble of claim 1, comprising a connector having a first connector housing with a cylindrical outer shell, a socket centered on the axis of the outer shell, and an insulating sleeve between the socket and the shell. The front end of the insulating sleeve projects beyond the front end of the socket and has peripheral portions defining a first male frustoconical surface. The coaxial connector has a second connector housing with a second cylindrical outer shell dimensioned to mate with the first outer shell, a contact pin centered on the axis of the second shell, and an insulating sleeve having portions defining complementary frustoconical surfaces to those at the front end of the first connector housing.In use, the convex surface of the connector helps eliminate misalignment between the plug and the socket during mating of the first and second connector housings.

[0006] EP 3 460 916 A1 discloses an electrical contact device for an electrical cable, in particular a twin-axial cable, for the automotive sector, comprising an open crimping section, wherein, in a crimped state of the contact device on the cable, a closed crimping section with an oval cross section is formed on the cable by means of the crimping section. Furthermore, a method for assembling an electrical cable for the automotive sector is disclosed, wherein, during assembly of the cable, an open crimping section of an electrical contact device or an electrical connection device on the cable is converted into a closed crimping section on the cable, wherein, during conversion of the open crimping section into the closed crimping section, a crimping section with an oval and closed cross section is formed on the cable.

[0007] DE 10 2018 208532 A1 discloses a plug connection arrangement comprising a plug and a mating plug that can be plugged together with the plug along a plugging direction, wherein the impedance of the plug connection arrangement is constant at different plugging depths between the plug and the mating plug along the plugging direction.

[0008] EP 0 122 700 A2 discloses an electrical coaxial connector for connecting to a center conductor and a plurality of outer conductors of a coaxial cable, the coaxial connector comprising a center contact element that can be attached to the center conductor and positioned within a bore of an inner dielectric element of an inner contact assembly. Furthermore, an inner contact element of the inner contact assembly and an outer contact assembly comprising an outer dielectric element having a bore in which the inner contact assembly is arranged, as well as an outer contact element to which an outer conductor of the plurality of outer conductors can be electrically connected.The outer contact element has a crimp portion and a sealing portion positionable on an outer sheath of the cable and having a sealing element disposed within a recess of the sealing portion to form a seal between the sealing portion and the outer sheath of the cable. A crimp element is provided for connecting the inner conductor of the outer conductors to the inner contact element of the inner contact assembly, wherein the inner contact assembly is disposed within the bore of the outer dielectric element. A crimp ring element is positionable for the cable along the crimp portion, wherein the outer conductor of the plurality of outer conductors is positioned between the crimp ring element and the crimp portion such that the crimp portion can be crimped onto the crimp ring element such that the outer conductor is captured therebetween. Description of the invention

[0009] It is therefore an object of the present invention to overcome at least one disadvantage mentioned in the prior art and to produce a detachable connection arrangement for connecting cables, in particular high-frequency cables, to an electrical component, such as another cable or a semiconductor board, in which the transmission quality of the signals to be transmitted is impaired as little as possible.

[0010] The object of the invention is achieved by a connector assembly having the features of the independent claim. Further advantageous embodiments of the invention can be found in the dependent claims, the description, and the drawings.

[0011] A plug connector assembly according to the invention is suitable for connecting a cable to an electrical component. In this context, an electrical component can be understood as meaning, for example, a semiconductor circuit board, but also another cable that is to be connected to the cable. The plug connector assembly according to the invention comprises a plug-in unit. The plug-in unit can be connected to the cable or the electrical component in an electrically conductive and preferably non-detachable manner and has an outer conductor element, an insulator element, and an inner conductor element. Furthermore, the plug connector assembly comprises a mating plug-in unit that can be connected to the plug-in unit in an electrically conductive and preferably detachable manner. The mating plug-in unit is electrically conductively connected to the electrical component or the cable that is to be connected to the plug-in unit, preferably non-detachably.The mating unit also includes an outer conductor element, an insulator element and an inner conductor element.

[0012] The insulator element of the plug-in unit is arranged within the outer conductor element of the plug-in unit. The insulator element of the plug-in unit has an inner conductor channel in which the inner conductor element of the plug-in unit is arranged. In this context, an inner conductor channel can be understood as a tubular passage in the insulator element. The mating plug-in unit has a comparable arrangement of outer conductor element, insulator element, and inner conductor element. The insulator element of the mating plug-in unit therefore also has an inner conductor channel. A described structure can be realized, for example, by the outer conductor element of the plug-in unit and the mating plug contents being designed as a sleeve in which the preferably cylindrical insulator element is arranged. The inner conductor element is arranged in the inner conductor channel of the insulator element.The longitudinal axes of the inner conductor element, outer conductor element, and insulator element preferably run parallel in both the plug-in unit and the mating plug-in unit. It is particularly preferred that the inner conductor channel is arranged, in particular, centrally on the longitudinal axis of the insulator element in both the plug-in unit and the mating plug-in unit. However, a coaxial arrangement of the inner conductor element, outer conductor element, and insulator element is most preferred in both the plug-in unit and the mating plug-in unit.

[0013] The plug-in unit has a first plug-in side. In this context, the first plug-in side can be understood to mean the side of the plug-in unit at which the plug-in unit can be connected, preferably detachably, to the mating plug-in unit. The insulator element of the plug-in unit forms, at least in part, a plug-in profile at one end facing the plug-in side. The plug-in profile is particularly preferably arranged on the end face of the insulator element of the plug-in unit that faces the first plug-in side. The plug-in profile runs at least partially around the inner conductor channel and has at least one elevation and / or depression. It is also possible for the plug-in profile to have a plurality of elevations and depressions or a combination of one or more elevations and one or more depressions. The elevations and / or depressions preferably extend parallel to the longitudinal axis of the insulator element of the plug-in unit.Furthermore, the plug-in profile is preferably arranged in a ring around the inner conductor channel and can either be arranged at a distance from the inner conductor channel or be adjacent to the inner conductor channel.

[0014] The mating plug unit has a second plug side. In this context, the second plug side can be understood to mean the side of the mating plug unit to which the mating plug unit can be connected, preferably detachably. The insulator element of the mating plug unit forms a mating plug profile at least partially at one end facing the second plug side. The mating plug profile is preferably arranged on an end face of the insulator element of the mating plug unit. The mating plug profile preferably also runs at least partially around the inner conductor channel of the insulator element of the mating plug unit and can be annular. The mating plug profile corresponds, at least in sections, to a negative form of the plug profile.

[0015] The plug-in unit and the mating plug-in unit can be connected to one another in such a way that the plug-in profile and the mating plug-in profile abut one another at least in sections. The connection can be made, for example, by inserting the outer conductor elements of the plug-in unit and the mating plug-in unit into one another with the first and second plug-in sides facing one another, and by electrically connecting the inner conductor elements of the plug-in unit and the mating plug-in unit.

[0016] The plug-in profile is partially formed by the inner conductor element of the plug-in unit. Part of the plug-in profile is therefore formed by the insulator element and part of the plug-in profile is formed by the inner conductor element of the plug-in unit. In this way, the mating plug-in profile can be positioned not only particularly close to the insulator element of the plug-in unit, but also with the smallest possible distance to the inner conductor element of the plug-in unit when the plug-in unit and mating plug-in unit are connected to one another. The mating plug-in profile can also be partially formed by the inner conductor element of the mating plug-in unit. The inner conductor element of the plug-in unit and / or the mating plug-in unit have a profile section in the area of ​​the plug-in profile. Within the profile section, the inner conductor element has a targeted shape that enables the plug-in profile and mating plug-in profile to fit particularly closely to one another.

[0017] The connector assembly according to the invention provides a connection option, particularly for high-frequency cables, that ensures comparatively high signal quality. This is essentially due to the tight fit of the plug profile and the mating plug profile. Even in the case of large tolerance fluctuations, this ensures that no air gap can form between the two insulator elements extending all the way to the outer conductor. Fluctuations in the line impedance and the associated signal quality can thus be kept to a minimum, even with tolerance fluctuations.

[0018] In this context, it can be advantageous if the profile section has a conical, parabolic and / or bulbous shape. If the inner conductor element is a contact tip, it has proven particularly advantageous if the inner conductor element tapers in the profile section towards the plug-in side. If the inner conductor element is a contact socket, it has proven advantageous if the inner conductor element widens in the profile section towards the plug-in side. The shape of the profile section is particularly preferably rotationally symmetrical about a central axis of the inner conductor element.

[0019] The plug profile and / or the mating plug profile can have a chamfer that at least partially surrounds the inner conductor channel of the respective insulator element. The chamfer can be arranged either on a raised portion or on a recess of the plug profile and / or the mating plug profile. The chamfer can be arranged on a side of the raised portion and / or recess facing and / or away from the inner conductor channel. The chamfer can, for example, have an angle of 20 to 70 degrees. If the chamfer completely surrounds the inner conductor, an angle of 40 to 140 degrees can be enclosed by two opposing chamfers. The chamfer allows the plug profile and / or the mating plug profile to be used as a guide during the connection process, ensuring that all components are connected securely and in an electrically conductive manner, even if the plug unit and mating plug unit are plugged together at an angle.The chamfer can also be arranged on an outer edge of the insulator element of the plug-in unit or mating plug-in unit. Particularly preferably, the chamfer is arranged on an outer edge of the end face of the insulator element of the plug-in unit and / or mating plug-in unit, which faces the respective plug-in side.

[0020] The inner conductor element of the plug-in unit can comprise a first contacting section that protrudes from the insulator element toward the first plug-in side. If the inner conductor element has a profile section, it is preferred that the first contacting section be adjacent to the profile section. The contacting section can be designed as a contact tip and have a length of 2.5 to 5 millimeters. Furthermore, the first contacting section can have a smallest diameter of the inner conductor element.

[0021] The first contacting section can be inserted into the inner conductor channel of the insulator element of the mating plug unit and can be electrically connected to a second contacting section of the inner conductor element of the mating plug unit. If the first contacting section is designed as a contact tip, it is advantageous at this point if the second contacting section is configured as a contact socket. It can be particularly advantageous if an electrically conductive connection between the first and second contacting sections can only be created within the inner conductor channel of the insulator element of the mating plug unit.

[0022] The inner conductor element of the mating plug unit can be recessed from the end of the insulator element of the mating plug unit facing the second plug side. In this case, the inner conductor element of the plug unit is first inserted into the inner conductor channel of the inner conductor element of the mating plug unit before the inner conductor element of the plug unit is electrically connected to the inner conductor element of the mating plug unit. The inner conductor element of the mating plug unit can be recessed by 0.4 to 1.2 millimeters from the end face of the insulator element facing the second plug side.

[0023] The insulator element of the mating plug unit can have a funnel shape at the end facing the second plug side in the region of the inner conductor channel. The funnel shape can serve as a guide to ensure that the inner conductor elements of the plug unit and the mating plug unit are electrically conductively connected when the plug unit is connected to the mating plug unit. The funnel shape is particularly advantageous when the inner conductor element must first be inserted into the inner conductor channel of the insulator element of the mating plug unit in order to be electrically conductively connected to the inner conductor element of the mating plug unit. The funnel shape is preferably round, wherein the center point of the funnel shape can be arranged on the longitudinal axis of the insulator element.

[0024] The funnel shape can also at least partially form the mating plug profile. The funnel shape can have both linear and curved side walls. Furthermore, it is preferred that the funnel shape at least partially corresponds to the negative shape of the inner conductor element of the plug-in unit in the region of the plug profile. In a particularly preferred embodiment, in addition to the funnel shape, the insulator element has a circumferential bevel on an outer edge, which partially forms the mating plug profile.

[0025] The plug-in profile or the mating plug-in profile can have an annular recess surrounding the inner conductor element. Particularly preferably, the center of the annular recess lies on the longitudinal axis of the inner conductor channel. Furthermore, the annular recess can be partially formed by the inner conductor element. The annular recess can be round or square, with straight or curved surfaces.

[0026] In a further embodiment, the outer conductor element, the inner conductor element, and the insulator element of the plug-in unit and / or the outer conductor element, the inner conductor element, and the insulator element of the mating plug-in unit are arranged coaxially to one another and have a common central axis. It is particularly preferred at this point that the plug-in profile and / or the mating plug-in profile have a concentric shape and / or a radially symmetrical shape relative to the central axis.

[0027] Furthermore, further advantages and features of the present invention will become apparent from the following description of preferred embodiments. The features described there and above can be implemented alone or in combination, provided the features do not contradict each other. The following description of the preferred embodiments is made with reference to the accompanying drawings. In the drawings: Figure 1 shows a first embodiment of a plug connector assembly according to the invention in a sectional view; Figure 2 shows an enlarged sectional view of the first embodiment; Figure 3 shows an enlarged sectional view of the first embodiment in a plug-in position; Figure 4 shows an enlarged view of the first embodiment in the region of a plug-in profile in the plug-in position; and Figure 5 shows an enlarged view of the first embodiment in the region of the mating plug-in profile during a plug-in process.

[0028] Figure 1shows a first embodiment of a plug connector assembly 1 according to the invention in a sectional view. The sectional plane runs along a longitudinal axis of the plug connector assembly 1. The plug connector assembly 1 comprises a piercing unit 4 and a mating plug unit 5. The plug unit 4 is electrically conductively connected to a cable 2. In the present exemplary embodiment, the cable 2 is a coaxial cable. The mating plug element 5 is electrically conductively and permanently connected to an electrical component 3. In the present exemplary embodiment, the electrical component 3 is also a coaxial cable. The plug unit 4 and the mating plug unit 5 each consist of an outer conductor element 6, 7, an insulator element 8, 9 and an inner conductor element 10, 11. The insulator elements 8, 9 each have an inner conductor channel 12, 13.The outer conductor elements 6, 7 are designed as bronze sleeves, so that the insulator elements 8, 9 are arranged entirely within the outer conductor elements 6, 7. The insulator elements 8, 9 are made of plastic and have a cylindrical geometry. The bronze inner conductor elements 10, 11 are each arranged in the inner conductor channel 12, 13 of the insulator elements 8, 9. The outer conductor elements 6, 7 are each electrically conductively connected to a shield 27 and slipped over a dielectric 29 of the respective cable 2, 3. The inner conductor elements 10, 11 are crimped to strands 28 of the cables 2, 3. In the present embodiment, the shield 27 is formed by a wire mesh.

[0029] The plug-in unit 4 has a first plug-in side 14, and the mating plug-in unit 5 has a second plug-in side 19. The plug-in unit 4 and the mating plug-in unit 5 are plugged into one another with the first and second plug-in sides 14, 19 facing one another. For this purpose, the outer conductor element 6 of the plug-in unit 4 has, in the area where the plug-in unit 4 and the mating plug-in unit 5 are plugged into one another, an outer diameter that is smaller than the inner diameter of the outer conductor element 7 of the mating plug-in unit 5 in the same area. Furthermore, the outer conductor element 7 of the mating plug-in unit 5 has a contact spring to fix the plug-in unit 4 in a force-fitting manner and to create a stable, electrically conductive connection between the two outer conductor elements 6, 7. In the view shown, the plug-in unit 4 and the mating plug-in unit 5 are already plugged into one another.In the present exemplary embodiment, the outer conductor elements 6, 7, the insulator elements 8, 9 and the inner conductor elements 10, 11 of the plug-in unit 4 and the mating plug-in unit 5 are arranged with their longitudinal axis on a common central axis 26.

[0030] Figure 2shows an enlarged view of the first embodiment of the plug connector assembly 1 according to the invention in a sectional view. The plug connector assembly 1 is in a plug-in position, with the plug-in unit 4 and the mating plug-in unit 5 positioned at the greatest possible distance from one another. This greatest possible distance can be caused, for example, by tolerances of the individual components or by a certain desired play between the components. The insulator element 8 of the plug-in unit 4 has a plug-in profile 16 on one end 15 facing the first plug-in side 14. In the present embodiment, the plug-in profile 16 is formed, on the one hand, by a recess 18 adjacent to the inner conductor channel 12 and extending annularly around the inner conductor channel 12. On the other hand, the plug-in profile 16 is formed by a profile section 22 of the inner conductor element 10.The insulator element 9 of the mating plug unit 5 has a mating plug profile 21 on an end face of an end 20 facing the second plug side 19. The mating plug profile 19 essentially corresponds to the negative shape of the plug profile 16. For this purpose, the insulator element 9 of the mating plug unit 5 has an elevation 17 on the end face which runs in a ring shape around the inner conductor channel 13.

[0031] The inner conductor element 10 of the plug-in element 4 has a first contacting section 24, which adjoins the profile section 22 and is designed as a contact tip. The contact tip protrudes from the insulator element 8 of the plug-in unit 4 toward the first plug-in side 14. Furthermore, the inner conductor element 10 tapers via the profile section 22 to the contacting section 24 to a smaller outer diameter. The inner conductor element 11 of the mating plug-in unit 5 protrudes from the end face at the end 20 of the insulator element 9 facing the second plug-in unit, with the inner conductor channel 13 extending to the end face. The inner conductor element 11 of the mating plug-in unit 5 has a second contacting section 25, which is designed as a contact socket. The contact socket has an inner diameter that is larger than the outer diameter of the first contacting section 24 of the inner conductor element 10 of the plug-in unit 4.In order to establish an electrically conductive contact between the contacting sections 24, 25, the first contacting section 24 is first inserted into the inner conductor channel 13 of the mating plug unit 5. The first contacting section 24 then dips into the second contacting section 25.

[0032] Figure 3shows a further illustration of the first embodiment of the connector assembly 1 according to the invention in a sectional view. In the illustration shown, the connector assembly 1 is also in the plug-in position, with the plug-in unit 4 and the mating plug-in unit 5 positioned at the smallest possible distance from one another due to tolerances. The first contacting section 24 is electrically conductively connected to the second contacting section 25. Furthermore, the plug-in profile 16 and the mating plug-in profile 21 abut one another. The elevation 17 of the mating plug-in profile 21 thus conforms to the shape of the recess 18 of the plug-in profile 16.The inner conductor element 10 of the plug-in unit 4 has a bulbous shape in the profile section 22 which tapers towards the first contacting section 24, so that the profile section 22, together with the recess 18 in the insulator element 8, has an annular recess surrounding the inner conductor element 10, the center of which is arranged on the central axis 26.

[0033] Figure 4shows a further enlarged illustration of the first embodiment of the plug connector assembly 1 according to the invention in a sectional view in the region of the plug profile 16 and the mating plug profile 21 in the plugged-in position. The mating plug profile 21 has a chamfer 23 on an outer edge of the end 20 of the insulator element 9 facing the second plug side 19, which chamfer extends from an outer surface of the insulator element 9 to the elevation 18. The recess 17 of the plug profile 16 has a complementary chamfer 23. Due to the chamfer 23 on both the plug profile 16 and the mating plug profile 21, the two insulator elements 8, 9 are guided towards one another, even when plugged together at a slight angle, which may be possible, for example, due to tolerances, in such a way that both insulator elements 8, 9 are arranged in a defined position relative to one another at the latest when the plug position is reached.The insulator element 9 of the mating plug unit 5 has a funnel shape on its front side, which extends around the inner conductor channel 13. This funnel shape ensures, on the one hand, that the mating plug profile 21 can at least partially form a negative shape of the plug profile 16, even in the area of ​​the plug profile 16 formed by the profile section 22 of the inner conductor element 10. Furthermore, the funnel shape ensures that when the plug unit 4 and the mating plug unit 5 are plugged together, the inner conductor element 10 of the plug unit 4 can be guided into the inner conductor channel 13 of the insulator element 9 of the mating plug unit 5 without damage.

[0034] In Figure 5In a further illustration of the first embodiment of the connector assembly 1, a sectional view of the plugging process of the inner conductor element 10 of the plug-in unit 4 into the inner conductor channel 13 of the insulator element 9 of the mating plug-in unit 5 is shown. Although the plug-in unit 4 and the mating plug-in unit 5 are not plugged into one another exactly parallel, but rather slightly diagonally, the first contacting section 24 is guided into the inner conductor channel 13 of the insulator element 9 by the funnel shape. The risk of the inner conductor element 10 of the plug-in unit 4 being pressed against the insulator element 9 of the mating plug-in unit 5 and being deformed or even broken off can thus be significantly reduced.

[0035] The explanations given with reference to the figures are purely exemplary and not limiting. LIST OF REFERENCE SYMBOLS

[0036] 1Connector arrangement 2Cable 3Component 4Plug-in unit 5Mating plug-in unit 6Outer conductor element of plug-in unit 7Outer conductor element of mating plug-in unit 8Insulator element of plug-in unit 9Insulator element of mating plug-in unit 10Inner conductor element of plug-in unit 11Inner conductor element of mating plug-in unit 12Inner conductor channel of plug-in unit 13Inner conductor channel of mating plug-in unit 14First plug-in side 15End of insulator element of plug-in unit 16Plug-in profile 17Protrusion 18Recess 19Second plug-in side 20End of insulator element of mating plug-in unit 21Mating plug-in profile 22Profile section 23Bevel 24First contacting section 25Second contacting section 26Central axis 27Shielding 28Litz wire 29Dielectric

Claims

1. Plug-in connector arrangement (1) for connecting a cable (2) to an electrical component (3), comprising: a plug-in unit (4) and a mating plug-in unit (5) which can be connected to the plug-in unit (4), wherein the plug-in unit (4) and the mating plug-in unit (5) each have an outer conductor element (6; 7), an insulator element (8; 9) and an inner conductor element (10; 11), the insulator element (8; 9) is arranged within the outer conductor element (6; 7) and comprises an inner conductor channel (12; 13) in which the inner conductor element (10; 11) is arranged, the plug-in unit (4) has a first plug-in side (14), the insulator element (8) of the plug-in unit (4) at least partially forms a plug-in profile (16) at an end (15) facing the first plug-in side (14), which plug-in profile runs around the inner conductor channel (12) at least in sections and has at least one raised portion (17) and / or recess (18); the mating plug-in unit (5) has a second plug-in side (19), the insulator element (9) of the mating plug-in unit (5) at least partially forms a mating plug-in profile (21) at an end (20) facing the second plug-in side (19), which mating plug-in profile corresponds to a negative shape of the plug-in profile (16) at least in sections, wherein the plug-in unit (4) and the mating plug-in unit (5) can be connected to each other in such a way that the plug-in profile (16) and the mating plug-in profile (21) bear against each other at least in sections, characterized in that the plug-in profile (16) is partially formed by the inner conductor element (10) of the plug-in unit (4) and / or the mating plug-in profile (21) is partially formed by the inner conductor element (11) of the mating plug-in unit (5), wherein the inner conductor element (10; 11) of the plug-in unit (4) and / or the mating plug-in unit (5) has a profile portion (22) in the region of the plug-in profile (16) and / or the mating plug-in profile (21) and the inner conductor element (10; 11) has a targeted shaping, which enables the plug-in profile (16) and the mating plug-in profile (21) to particularly conformally bear against each other.

2. Plug-in connector arrangement (1) according to the preceding claim, wherein the profile portion (22) has a conical, parabolic and / or bulbous shape.

3. Plug-in connector arrangement (1) according to either of the preceding claims, wherein the plug-in profile (16) and / or the mating plug-in profile (21) has a chamfer (23) which at least partially encircles the inner conductor channel (10; 11).

4. Plug-in connector arrangement (1) according to any of the preceding claims, wherein the inner conductor element (10) of the plug-in unit (4) comprises a first contacting portion (24), which protrudes from the insulator element (8) of the plug-in unit (4) in the direction of the first plug-in side (14).

5. Plug-in connector arrangement (1) according to the preceding claim, wherein the first contacting portion (24) can be inserted into the inner conductor channel (13) of the insulator element (9) of the mating plug-in unit (5) and can be electrically conductively connected to a second contacting portion (25) of the inner conductor element (11) of the mating plug-in unit (5).

6. Plug-in connector arrangement (1) according to any of the preceding claims, wherein the inner conductor element (11) of the mating plug-in unit (5) is behind that end (20) of the insulator element (9) of the mating plug-in unit (5) facing the second plug-in side (19).

7. Plug-in connector arrangement (1) according to any of the preceding claims, wherein the insulator element (9) of the mating plug-in unit (5) has a funnel shape at the end (20) facing the second plug-in side (19) in the region of the inner conductor channel (13).

8. Plug-in connector arrangement (1) according to the preceding claim, wherein the funnel shape at least partially forms the mating plug-in profile (21).

9. Plug-in connector arrangement (1) according to any of the preceding claims, wherein the plug-in profile (16) or the mating plug-in profile (21) has a ring recess encircling the inner conductor element (10; 11).

10. Plug-in connector arrangement (1) according to any of the preceding claims, wherein the outer conductor element (6), the insulator element (8) and the inner conductor element (10) of the plug-in unit (4) and / or the outer conductor element (7), the insulator element (9) and the inner conductor element (11) of the mating plug-in unit (5) are arranged coaxially to each other and have a common centre axis (26).

11. Plug-in connector arrangement (1) according to the preceding claim, wherein the plug-in profile (16) and / or the mating plug-in profile (21) have a concentric shape and / or a radially symmetrical shape with respect to the centre axis (26).