CN117917827A

CN117917827A - Plug connector, kit and plug connector part

Info

Publication number: CN117917827A
Application number: CN202311333978.5A
Authority: CN
Inventors: 迈克尔·迈耶; 克里斯蒂安·莫里茨; 弗兰斯·莫斯特曼; 穆罕默特·阿利·蒂尔克屈勒
Original assignee: Wago Verwaltungs GmbH
Current assignee: Wago Verwaltungs GmbH
Priority date: 2022-10-20
Filing date: 2023-10-16
Publication date: 2024-04-23
Also published as: DE102023125271A1; EP4358316A1; DE202022105928U1

Abstract

The invention relates to a plug connector (1) for mechanical fastening to a housing (6), comprising: a first plug connector part (2 a) having a plug contact (3); -a second plug connector part (2 b) arranged on the first plug connector part (2 a). The second plug connector part (2 b) has a wave-shaped contour (5) on the outside at least in sections, wherein the wave-shaped contour (5) has alternately arranged wave troughs (5 a) and wave crests (5 b), and wherein one wave trough (5 a) forms a locking contour for a corresponding locking element (7) of the housing (6) with two adjacently arranged wave crests (5 b) in each case.

Description

Plug connector, kit and plug connector part

Technical Field

The invention relates to a plug connector for mechanical fastening to a housing, comprising: a first plug connector part having a plug contact; a second plug connector part arranged on the first plug connector part.

The invention also relates to a kit of a plug connector and a housing, and to a plug connector part.

Background

For mechanically fastening the plug connector to the housing part, it is known, for example, to provide the plug connector with locking tabs which engage, for example, at wall openings of the housing part with locking edges or locking openings on the housing part, in order to detachably fix the plug connector to the housing part. The disadvantage is that the locking contour of the plug connector must always be matched to the corresponding locking contour of the housing part in order to achieve a reliable locking. Only the mating plug connector and housing part can be fixed to one another in this way.

Disclosure of Invention

Against this background, the invention is based on the object of providing a plug connector, a kit of plug connector and housing, and a plug connector part, by means of which a greater variety of connection possibilities between plug connector and housing part are provided.

The object is achieved by means of a plug connector, a kit and a plug connector part according to the invention. Advantageous embodiments of the invention are disclosed herein.

The invention thus relates to a plug connector for mechanical fastening to a housing. Plug connectors are known in the art of electrical connection. The plug connector serves as an electromechanical connection member for connecting flexible and rigid electrical conductors to establish an electrical connection.

Mechanical fastening is understood to mean the establishment of a particularly detachable connection of the two components, here the plug connector and the housing. The mechanical fastening is generally carried out using a form-fitting or force-fitting connection, wherein fastening means present on the housing and/or the plug connector and/or additional separate fastening means can be used.

The housing to which the plug connector can be mechanically fastened can be, for example, a device housing, a cable box or a junction box, etc. In addition to being mechanically fastened to the housing, the plug connector can also be electrically or electromechanically connected to a terminal element, such as a circuit board, other plug connector or a connecting terminal, located in the housing, so that an electrical connection can be established between the plug connector and the terminal element. Furthermore, the plug connector can be electrically or mechanically connected to a terminal element located outside the housing. Plug contacts of the plug connector and electrical conductors, such as conductor cables, electrical conductors and contact pins, which can be connected to the plug connector can be used to establish the electrical connection.

The plug connector has a first and a second plug connector part which, according to an embodiment, are arranged on each other detachably or non-detachably. "detachable" here means "non-destructive detachment", for example by means of the introduction of a manual detachment force or by means of a tool, in order to be able to subsequently reconnect the parts detached from one another without further maintenance effort or replacement of the parts. "non-detachable" is referred to herein as "non-destructively detachable", as is the case, for example, when the plug connector parts are manufactured integrally with one another, or when there is a non-destructively detachable material-mated connection between the plug connector parts.

The first plug connector part has a plug contact which is suitable for establishing an electrical connection of the plug connector with the terminal member. The plug contact forms a plug face which can face the terminal components to be connected in the plug direction.

According to the invention, the second plug connector part has a wave-shaped contour on the outside at least in sections, wherein the wave-shaped contour has alternately arranged wave troughs and wave crests, and wherein one wave trough forms a locking contour for a corresponding locking element of the housing with two adjacently arranged wave crests.

For example, the wave-shaped profile can form a locking edge, into which a locking tab, a locking projection or a locking hook of the housing can engage, due to the height difference between the respective wave crest and wave trough. By means of the plurality of locking edges formed by the wave-shaped contours, a plurality of locking edges can be used, so that the varying position or number of locking contours of different housing types is not critical for the secure fastening of the second plug connector part to the housing.

This provides universal fastening possibilities for such plug connectors on the housing. By a suitable choice of the distance between the wave troughs, a fine-tuned locking state can be achieved by means of different types of housings. There is no need to provide different plug connectors for different housings with different mechanical fastening means for matching the respective housing types. The insertion openings of housings, for example, of device housings produced by different manufacturers, are provided with locking tabs as standardized as possible, so that reliable mechanical fastening to different housing types can be achieved by means of the proposed plug connectors.

The outer side of the second plug connector part is currently regarded as the substantially visible outer surface of the second plug connector part. The wave-shaped contour may be arranged at least partly or substantially entirely on the outer side of the second plug connector part or cover at least half or at least two thirds of the outer side of the second plug connector part. The wave profile can be formed circumferentially around the second plug connector part. By encircling is understood that the wave trough or wave crest extends over the circumference of the second plug connector part, in particular over the entire circumference, i.e. once around the second plug connector part.

In the context of the present application, a wave profile or wave form is understood as a different geometric wave basic shape which can describe the geometric outer contour of the second plug connector part. For example, curved shapes, for example sinusoidal shapes, are conceivable, but also rectangular, triangular and zigzag shapes or combinations thereof, which can form the wave profile of the second plug connector part, are possible as wave base shapes.

The wave-shaped contour can thus be formed by a ridge which extends in an annular manner partially or completely circumferentially radially outwards on the outside of the plug connector part. The wave-shaped contour can also be realized by a groove which is introduced as a depression into the outer side of the plug connector part and extends in an annular manner over the circumference of the plug connector part in a partial or complete circumferential manner. Combinations of such ridges and grooves are also conceivable, in particular when they alternate in the plug-in direction as a ridge-groove sequence.

The first plug connector part may have a plug contact side with a plug contact and a conductor terminal side of the conductor terminal to be connected opposite the plug contact side. An electrical conductor, such as a conductor cable or a contact pin, can be connected to the conductor terminal side, which can interact electrically with the plug contact and can be used to establish an electrical connection. The conductor terminal side can face away from the plug contact side, for example, and also from the plug face of the plug contact.

The second plug connector part may be arranged on the conductor terminal side of the first plug connector part. The second plug connector part can be arranged opposite the plug face of the plug contact and facing away from it on the first plug connector part. Thus, the plug contact portion can be exposed and can be directly connected to the terminal member. The first and the second plug connector part may be arranged on each other at the end sides such that the end side of the first plug connector part abuts against the end side of the second plug connector part.

The second plug connector part may receive a conductor terminal therein. For example, the second plug connector part may have a cavity or channel or may be essentially formed as a hollow body, so that the conductor terminals can be accommodated in the cavity or channel of the second plug connector part and at least partially enclosed by the second plug connector part. The second plug connector part may at least partially frame the conductor terminal. Thereby, the second plug connector part protects the conductor terminals from the external environment.

The second plug connector part may have a conductor lead-through. By means of the conductor lead-through, an electrical conductor, such as a conductor cable, an electrical conductor wire or a contact pin, can be guided through the second plug connector part to the first plug connector part. By means of the conductor lead-through, the electrical conductor can be led to the conductor terminal side and the conductor terminal of the first plug connector part. For example, the conductor leadthrough may be formed as a conductor guide channel or as a plurality of conductor guide channels. The conductor lead-through can open into the conductor lead-in opening on a side of the second plug connector part which is opposite to the side of the second plug connector part which is arranged on the first plug connector part, for example opposite to the conductor terminal side. The connection of the electrical conductor to the first plug connector part is facilitated by the conductor lead-through and the electrical conductor is reliably held and guided in the second plug connector part.

The second plug connector part has a cylindrical basic shape. By means of the cylindrical basic shape, the second plug connector part can be produced in a simple and material-saving manner and can be provided with a wave-shaped contour. The cylindrical basic shape may have a circular cross-section. The second plug connector part may in particular have a cylindrical basic shape with a circular cross section. In the case of a cylindrical basic shape, the second plug connector part can have two opposite end sides which are connected to one another by a housing having a circular cross section. The wave profile may be formed on the outer side. The wave-shaped contour can be formed on the outer side in an annular manner, i.e. circularly around the ring Zhou Goucheng. The wave profile may extend radially on the outer side. In principle, other circular cross-sectional shapes, such as elliptical cross-sectional shapes, are also conceivable for the cylindrical basic shape. The cylindrical basic shape may be formed at least in sections as a hollow cylinder, so that a cavity is formed in the second plug connector part.

The second plug connector part may be a hollow body. Hollow body is understood to be a body with a cavity located inside. The second plug connector part can thus be produced easily and with little material. Furthermore, the cavity may enable guiding the electrical conductor through the second plug connector part.

The wave crests and the wave troughs can be arranged in sequence in the plugging direction. The plugging direction is the direction in which the terminal member is plugged onto the plug contact of the plug connector or the direction in which the plug connector can be plugged into the terminal member by means of the plug contact. The wave trough or wave crest can thus extend transversely to the plugging direction on the second plug connector part. This ensures that the plug connector is securely fastened to the housing during the plugging process.

The peaks may be formed by ridges extending transversely to the plug-in direction of the plug connector and/or the valleys may be formed by grooves extending transversely to the plug-in direction of the plug connector. The groove may be a groove-like or groove-like depression in the outer surface of the second plug connector part. For example, the ridges and grooves can have a rectangular, U-shaped, or curvilinear cross-section or profile.

The wave profile may be configured as a closed annular profile. This means that the wave trough or wave crest forms a closed ring around the circumference of the second plug connector part. This ensures that the peaks and valleys form locking edges transversely to the insertion direction. By means of the closed annular contour, a secure locking of the second plug connector part in any position along the circumference of the annular contour can be achieved with corresponding locking elements of the housing. Within the scope of the application, a helical or threaded extension around the peaks or valleys of the second plug connector part is not considered as a closed annular profile. In other embodiments, however, a spiral or screw-like development forming a wave-shaped contour is not precluded, so that the locking position can be fine-tuned by a pivoting movement of the plug connector.

The plug contact can form a plug or a socket. Whereby a more widespread use of the connector can be achieved. The designation plug or socket relates to the inner conductor of the plug connector and is also referred to as a male contact or contact pin (plug) or female contact or plug bush (socket).

The second plug connector part may consist of at least two sub-parts which can be detachably connected to each other. Herein, "detachable" means "non-destructively detachable", for example by the introduction of a manual detachment force or by means of a tool. Improved accessibility of the first and second plug connector parts can thereby be achieved in that: during the access to the first or second plug connector part, the sub-parts of the second plug connector part can be detached or separated from each other, so that, for example, a conductor connection on the first plug connector part or a wiring of the conductors within the second plug connector part can be carried out comfortably. After the access is completed, the sub-components can be reassembled and connected to each other so that, for example, the conductor terminals can be enclosed together. For example, the sub-components may be connected to each other by means of a locking connection or a clip connection to provide a simple and intuitive detachable connection possibility. For example, the sub-components may be assembled radially or translationally. For example, it is also conceivable to slide the sub-parts translationally into each other along the guide in order to fasten the sub-parts to each other.

The sub-parts may have a height deviation along their parting profile to improve the stability of the second plug connector part and to provide coding when assembling the sub-parts.

For example, the sub-component may be a half-shell. Thus, since only the two half-shells have to be brought together or separated, an easy disassembly and fastening of the sub-parts to each other and a stability of the second plug connector part are facilitated. For example, the half-shells may be rigid, flexible or partially flexible.

The second plug connector part may be designed to be entirely rigid, flexible or partially flexible. A high stability can be achieved by means of the rigid second plug connector part, and an easier locking and unlocking of the second plug connector part with the locking element of the housing can be achieved by means of the flexible second plug connector part.

The second plug connector part may have a wire guard. This mechanically ensures that the electrical conductor is connected to the plug connector. For example, the electrical conductors leading to the first plug connector part can be fixed to the wire protection device by means of suitable fastening elements, so that when the wires outside the plug connector are pulled, no pulling force is exerted on the conductor terminals of the wires on the first plug connector part. For example, the wire-protecting device may be arranged inside the second plug connector part or on its end side opposite to the conductor terminal side. For example, the wire guard may be provided at the conductor lead-through or at the conductor lead-in opening of the second plug connector part.

The second plug connector part may have a form-fitting contour for the form-fitting connection of the second plug connector part to the first plug connector part. For example, the form-fitting contour may have an inner contour which is formed as a negative contour of the outer contour of the first plug connector part on its conductor terminal side. Conversely, the form-fitting contour can also have an outer contour which is formed as a negative contour of the inner contour of the first plug connector part on its conductor terminal side. However, it is also conceivable for the form-fitting contour to be formed only in sections on the second plug connector part, for example by means of suitable shaped projections which can form undercuts with corresponding shaped portions of the first plug connector part point by point or section by section.

The second plug connector part can be engaged into the fastening groove of the first plug connector part by means of the fastening projection. Conversely, the first plug connector part can also be engaged into the fastening groove of the second plug connector part by means of the fastening projection. A form fit is thereby also formed, which enables simple mechanical fastening of the plug connector parts to one another. The second plug connector part may have one or more unlocking surfaces, by means of which the release of the fastening projection from the fastening groove can be achieved or simplified by applying mechanical pressure to the actuating surface.

In other embodiments, the first and second plug connector parts may be non-detachably connected to each other. Here, "non-detachable" means "non-destructively detachable", as is the case, for example, with plug connector parts manufactured in one piece with one another or with material-fitted connections that are non-destructively detachable between the plug connector parts. The one-piece, unitary production of the plug connector parts enables simple production and high stability of the plug connector.

The plug connector may be a circular plug connector. For example, in combination with the cylindrical basic shape of the second plug connector part, a harmonious overall appearance and a space-saving configuration of the plug connector are obtained.

The object is also achieved by means of a kit of a housing and a plug connector according to the invention, wherein the housing has a locking element which is designed for locking with the wave profile of the plug connector.

The advantage of universal fastening and locking possibilities of the plug connector and of the individual on the housing is also achieved by means of the kit according to the invention.

The housing can have at least two locking elements, which are designed for locking engagement in different troughs of the wave profile. The locking elements do not have to be positively engaged in the recesses directly following one another in the plug-in direction, but the recesses for engagement can be spaced apart from one another by further recesses.

The object is also achieved by means of a plug connector part which is designed for connection with a plug part or a socket part. According to the invention, the plug connector part has a wave-like contour on the outside at least in sections, wherein the wave-like contour has alternating wave troughs and wave peaks. The advantage of the universal possibility of fastening the plug connector with the plug part or the socket part by means of the plug connector part and the individual locking possibility on the housing can also be achieved by the plug connector part according to the invention. The existing plug connectors can be retrofitted in particular with the plug connector part according to the invention.

The connector part may be formed according to one of the features associated with the second plug connector part of the plug connector described above. For example, the plug connector part can have a conductor lead-through, a cylindrical basic shape, be a hollow body, have a wave-shaped contour which is formed as a closed contour, be composed of at least two sub-parts, for example two half-shells, have a wire-protecting device, have a form-fitting contour for a form-fitting connection with a plug or socket part and/or have a fastening projection for a connection with a plug or socket part.

Drawings

The invention is susceptible of different embodiments and will be described in detail with reference to the accompanying drawings according to examples. Schematically shown is:

Fig. 1 shows a perspective top view of a plug connector with first and second plug connector parts in one embodiment;

fig. 2 shows an exploded perspective view of the plug connector parts of the plug connector;

fig. 3 shows a top view of the plug connector;

fig. 4 shows a side view of the plug connector;

fig. 5 shows a top view of a plug connector mechanically fastened to a housing;

fig. 6 shows a longitudinal section through the housing and the plug connector along the section line C-C shown in fig. 5;

Fig. 7 shows a cross-sectional view of the housing and the plug connector along the section line D-D shown in fig. 5;

fig. 8 shows an enlarged view of a part of the longitudinal section according to fig. 6.

Detailed Description

Fig. 1 shows a plug connector 1 for mechanical fastening to a housing 6 shown in fig. 5 to 8. The plug connector 1 has a first plug connector part 2a with a plug contact 3. The plug contact 3 serves to electrically connect the plug connector 1 to a corresponding plug terminal of a terminal component, for example a further plug connector or a connecting terminal, and can be plugged together with the component in the plug direction S. The housing 6 may be, for example, a device housing. The second plug connector part 2b is detachably arranged on the first plug connector part 2 a. The second plug connector part 2b has a wave-shaped profile 5 on its outer side, which has alternately arranged wave-shaped troughs 5a and wave-shaped peaks 5b. For clarity, only one trough 5a and one peak 5b, respectively, are provided with reference numerals in the figures. As shown in fig. 5 to 8, the troughs 5a and the crests 5b form a locking contour for the locking element 7 of the housing 6. The second plug connector part 2b has a cylindrical basic shape and is embodied as a hollow body with a cavity. The wave-shaped contour 5 is formed on the outer side of the cylindrical second plug connector part 2 b. The peaks 5b and the troughs 5a are arranged one after the other in the plug-in direction S, i.e. extend transversely to the plug-in direction S or also transversely to the longitudinal extension direction L of the plug-in connector 1.

In fig. 2, a further detail of the plug connector 1 is visible in an exploded view, the plug connector having a first plug connector part 2a thereof and a second plug connector part 2b formed from two sub-parts 2b ₁ and 2b ₂ which can be detached from one another. The first plug connector part 2a has a plug contact side 9 with a plug contact 3, the plug contact 3 forming a plug face on the plug contact side 9. Opposite the plug contact side 9, the first plug connector part 2a has a conductor terminal side 4 with conductor terminals 11. For example, a cable may be connected to the conductor terminal 11 and electrically connected to the plug contact 3 of the plug connector 1. As shown in fig. 1, the second plug connector part 2b is arranged on the conductor terminal side 4 of the first plug connector part 2a and accommodates the conductor terminal 11 in its interior cavity. For this purpose, the second plug connector part 2b has a form-fitting contour 14, which is an inner contour of the second plug connector part 2b, which forms a negative contour of the outer contour of the first plug connector part 2a on its conductor terminal side 4. Furthermore, the second plug connector part 2b has two fastening projections 15 which, when the plug connector parts 2a, 2b are assembled together, sink into the fastening grooves 8 of the first plug connector part 2a, thereby facilitating a form-fitting connection of the plug connector parts 2a and 2b to each other. The fastening projection 15 can be released from the fastening groove 8 by pressure exerted on the unlocking surface 18.

The second connector part 2b is formed from sub-parts 2b ₁ and 2b ₂, which are embodied as two half-shells. The sub-parts 2b ₁ and 2b ₂ are detachably connected to each other by means of locking tabs 10b of the second sub-part 2b ₂, which engage in locking recesses 10a of the first sub-part 2b ₁. The height deviation 17 of the sub-parts 2b ₁ and 2b ₂ along their parting contour 19 facilitates positioning and assembly and increases the stability of the second plug connector part 2 b.

The second plug connector part 2b has a conductor lead-through 12, by means of which the electrical conductor can be led to the conductor terminal 11 of the first plug connector part 2 a.

Fig. 3 shows a top view of the plug connector 1. It is evident that the wave trough 5a and the wave crest 5b form a closed annular contour around the circumference of the second plug connector 2 b. It can also be seen that the height difference between the wave trough 5a and the wave crest 5b is suitable for constituting a sufficient locking edge for the locking element 7 of the housing 6.

In fig. 4, a side view of the plug connector 1 can be seen. The second plug connector part 2b can be seen on its side opposite to the side on which the second plug connector part 2b is arranged on the first plug connector part 2 a. On this side, a conductor insertion opening 16 is provided through which the electrical conductor can be guided into the second plug connector part 2b and through its conductor lead-through 12 to the conductor terminal 11 of the first plug connector part 2 a. The cable guard 13 of the second plug connector part 2b can also be seen, by means of which the electrical conductor or conductors can be mechanically fastened to the plug connector part 2 b. Furthermore, two sub-parts 2b ₁ and 2b ₂ can be seen, which are connected to one another at their parting profile 19.

Fig. 5 shows the plug connector 1 inserted into a housing opening of a housing 6. The housing 6 has two locking elements 7, of which only one 7 can be seen in fig. 5 for the sake of illustration. The locking element 7 is embodied as a locking hook which engages in a trough 5a of the second plug connector part 2b between two peaks 5b, thereby mechanically fixing the plug connector 1 to the housing 6.

As can be seen in the longitudinal section of fig. 6, the locking elements 7 of the housing 6 are arranged at different positions of the housing 6 with an offset in the plugging direction S. The locking element 7 can thus engage into different wave troughs 5a of the second plug connector part 2b, wherein the wave troughs 5a are separated from one another by a plurality of further wave troughs 5 a. It is thus clear that universal fastening possibilities are provided by means of the plug connector 1, since sufficient wave troughs 5a are provided for mechanically fixing the plug connector 1 to the housing 6, irrespective of the number, position and orientation of the locking elements 7 on different housing types.

The housing 6 may optionally, as shown by way of example, have a flange 21 (or flange), by means of which a stop surface is formed in order to fix the housing 6 in its form-fitting manner, for example, in a receiving opening of a device housing (not shown).

In the cross-sectional view of fig. 7 it is clear how the conductor lead-through 12 in the second plug connector part 2b is designed in an x-shape within the sub-parts 2b ₁ and 2b ₂ connected to each other via the locking tab 10b in order to provide for orderly conductor guidance. In addition, it is also seen in cross section how the locking element 7 of the housing 6 engages in the trough 5 a.

As can be seen from the enlarged longitudinal section according to fig. 8, the wave crests 5b are formed by ridges having a rectangular cross section, while the wave troughs 5a are formed by U-shaped grooves. Thus, the wave basic shape is a combined rectangular and curvilinear waveform. The flanks of the ridge form a locking edge 20 which can be engaged from behind by a locking element 7 of the housing 6, which is embodied as a locking hook as shown.

List of reference numerals

1-Plug connector

2A first plug connector part

2B second plug connector part

2B ₁ first sub-component

2B ₂ second sub-component

3 Plug-in contact

4 Conductor terminal side

5 Waveform profile

5A wave trough

5B wave crest

6 Shell body

7 Locking element

8 Fastening groove

9 Plug contact side

10A locking recess

10B locking piece

11 Conductor terminal

12 Conductor threading part

13 Wire protection device

14 Shape-fitting profile

15 Fastening projection

16-Conductor lead-in port

17 Deviation from height

18 Unlocking surface

19 Parting profile

20 Locking edge

21 Flange

L longitudinal extension direction

S-shaped plugging direction

Claims

1. A plug connector (1) for mechanical fastening to a housing, the plug connector having: a first plug connector part (2 a) having a plug contact (3); and a second plug connector part (2 b) which is arranged on the first plug connector part (2 a), characterized in that the second plug connector part (2 b) has a wave profile (5) on the outside at least in sections, wherein the wave profile (5) has alternately arranged wave troughs (5 a) and wave crests (5 b), and wherein one wave trough (5 a) forms a locking profile for a corresponding locking element of the housing with two adjacently arranged wave crests (5 b), respectively.

2. Plug connector (1) according to claim 1, characterized in that the first plug connector part (2 a) has a plug contact side (9) with a plug contact (3) and a conductor terminal side (4) with a conductor terminal (11), which is opposite the plug contact side (9).

3. Plug connector (1) according to claim 2, characterized in that the second plug connector part (2 b) is arranged on the conductor terminal side (4) of the first plug connector part (2 a).

4. A plug connector (1) according to claim 3, wherein the second plug connector part (2 b) accommodates the conductor terminal (11) therein.

5. Plug connector (1) according to one of the preceding claims, characterized in that the second plug connector part (2 b) has a conductor lead-through (12).

6. Plug connector (1) according to one of the preceding claims, characterized in that the second plug connector part (2 b) has a cylindrical basic shape.

7. Plug connector (1) according to one of the preceding claims, characterized in that the second plug connector part (2 b) is a hollow body.

8. Plug connector (1) according to one of the preceding claims, characterized in that the peaks (5 b) and the valleys (5 a) are arranged in succession in the plug-in direction (S).

9. Plug connector (1) according to one of the preceding claims, characterized in that the wave crests (5 b) are formed by ridges extending transversely to the plug-in direction (S) of the plug connector (1) and/or the wave troughs (5 a) are formed by grooves extending transversely to the plug-in direction (S) of the plug connector (1).

10. Plug connector (1) according to one of the preceding claims, characterized in that the wave-shaped profile (5) is formed as a closed annular profile.

11. Plug connector (1) according to one of the preceding claims, characterized in that the plug contact (3) forms a plug or a socket.

12. Plug connector (1) according to one of the preceding claims, characterized in that the second plug connector part (2 b) consists of at least two sub-parts (2 b ₁、2b₂) which can be detachably connected to one another.

13. Plug connector (1) according to claim 12, characterized in that the sub-part (2 b ₁、2b₂) is a half-shell.

14. Plug connector (1) according to claim 12 or 13, characterized in that the sub-parts (2 b ₁、2b₂) can be connected to each other by means of a locking connection in which the locking tab (10 b) of one sub-part (2 b ₂) engages into the locking recess (10 a) of the other sub-part (2 b ₁).

15. Plug connector (1) according to one of the preceding claims, characterized in that the second plug connector part (2 b) has a wire protection device (13).

16. Plug connector (1) according to one of the preceding claims, characterized in that the second plug connector part (2 b) has a form-fitting contour (14) for the form-fitting connection of the second plug connector part (2 b) with the first plug connector part (2 a).

17. Plug connector (1) according to one of the preceding claims, characterized in that the second plug connector part (2 b) engages into a fastening groove (8) of the first plug connector part (2 a) by means of a fastening projection (15).

18. Plug connector (1) according to any one of the preceding claims, characterized in that the first plug connector part (2 a) and the second plug connector part (2 b) are non-detachably connected to each other.

19. Plug connector (1) according to one of the preceding claims, characterized in that the plug connector (1) is a circular plug connector.

20. Kit of a housing (6) and a plug connector (1) according to one of the preceding claims, characterized in that the housing (6) has a locking element (7) which is designed for locking with a wave profile (5) of the plug connector (1).

21. Kit according to claim 20, characterized in that the housing (6) has at least two locking elements (7) designed for locking engagement into different valleys (5 a) of the wave profile (5).

22. Plug connector part (2 b) designed for connection with a plug or socket part (2 a), characterized in that the plug connector part (2 b) has a wave-shaped profile (5) on the outside at least in sections, wherein the wave-shaped profile (5) has alternately arranged wave troughs (5 a) and wave crests (5 b).

23. Plug connector part (2 b) according to claim 22, characterized in that the plug connector part (2 b) is constructed according to one of the features of the second plug connector part (2 b) of claims 2 to 19.