EP3262722B1 - Plug connection comprising a locking device - Google Patents

Description

The invention relates to a plug connection comprising a plug connector and a mating plug connector, in particular a high-current plug connection, with a locking device for axially fixing the plug connector with respect to the mating plug connector in a closed position coupled to the mating plug connector. The locking device comprises on the one hand a holding element such as a locking bracket for axially engaging behind a locking projection of the mating connector in the closed position and on the other hand a counter pressure element which is opposite the holding element in such a way that the locking projection of the mating connector can be received between the holding element and the counter pressure element in the closed position.

Connectors generally serve for releasably connecting electrical lines or other electrical components in order to transmit current and / or electrical signals when connected. A first plug connector, such as a plug part, is plugged together with a complementary mating plug connector, such as a socket part, to form a plug connection.

In motor vehicles with an electrified powertrain, ie in electric or hybrid vehicles, high electrical powers have to be transmitted from an energy source to a consumer. For this, high-current lines and high-current plugs are regularly used, which are set up to transmit high currents of up to 50 A or more. Connectors to be used directly on the engine block are high mechanical ones Exposed to loads such as vibrations and vibrations, so that these connectors must meet high requirements with regard to stability, durability, etc.

In order to prevent a relative mobility in the area of a plug connection between a plug connector and a mating plug connector, which leads to wear and tear due to vibrations, conventional plug connectors have a locking device by means of which the plug connector, in a locked position coupled with the mating plug connector, is as fixed and immovable as possible with respect to the Mating connector is held, and also prevents the connector from being pulled off or falling off the mating connector.

From the US 7 758 370 B1 there is known a quick connect electrical connector having a tubular sleeve and an outer tubular housing disposed over the tubular sleeve, the outer tubular housing having two openings for receiving two bumps from the tubular sleeve. An elastic element presses the tubular sleeve and the outer tubular housing against one another with prestress. When it is inserted into a mating connector, the deflectable elevations are pressed radially inwards and snap into a recess in a wall of the mating connector. Movement of the outer tubular housing relative to the tubular sleeve causes the bumps to be pushed radially inward to disengage the electrical connector. In an alternative embodiment, movement of the outer tubular housing relative to the tubular sleeve results in the elevations being pressed radially outward in order to release the electrical connector. Furthermore, a spring is arranged in the interior of the outer tubular housing, which is part of a release mechanism. To release the connector from the mating connector, the outer tubular housing is pulled back against the biasing force of the spring, whereby the elevations are pressed inward by the front end of the housing. The connector can be removed. The connector does not have a counter pressure element which is opposite a holding element in such a way that a projection of the mating connector is in between is recordable. The spring does not exert or cause any direct or indirect force between the connector and mating connector. The spring is used solely for the purpose of keeping the tubular housing and a body which carries the elevations at a predetermined distance in which the elevations protrude outwards.

However, it has been found that the snap-in connection described in the case of plug connections which are exposed to particularly high mechanical loads and vibrations (for example vibration class 4) lead to signs of wear and tear on the plug connector which can reduce the durability of the plug connection.

In view of the problems described, it is the object of the present invention to develop a plug connector in such a way that it can be used even with plug connections exposed to particularly high vibrations, without being subject to wear and tear.

This object is achieved according to the invention by means of a plug connection comprising a plug connector and mating connector according to claim 1. Advantageous developments of the invention are described in the dependent claims.

A connector according to the invention has an actuating device which is designed to press the holding element and the counter-pressure element against the locking projection of the mating connector arranged between them. The holding element or the counter-pressure element are adjusted by means of the actuating device from a release position into a fixing position, in which the holding element and / or the counter-pressure element are pressed more strongly against the locking projection than in the release position.

In other words, the actuating device serves to press the holding element in the direction of the counter-pressure element to reduce the distance therebetween and / or to push the counter-pressure element in the direction of the holding element to reduce the distance therebetween. This allows Holding element and counter-pressure element are pressed on both sides against the locking projection arranged in between and any axial play is thereby removed from the plug connection.

In other words, the actuating device is used to move the holding element and / or the counter-pressure element from a release position with a first distance between the holding element and the counter-pressure element to a fixing position with a second distance between the holding element and the counter-pressure element, which is smaller than the first distance Press the holding element and counter pressure element on both sides against the locking projection.

The invention is based on the knowledge that, in the case of conventional latching mechanisms, there is naturally a small axial play between a holding element in the form of a latching bracket and the locking projection in the closed position, in order to enable latching at all. The holding element is namely because of the coupling force directed in the direction of insertion after snapping not directly in contact with the locking projection, but with a small distance behind it, the axial play caused by this distance leading to the wear and tear phenomena mentioned above in the event of vibrations. According to the invention, an actuating device is now provided in order to completely eliminate this axial play, which is naturally present at first, by moving the holding element and / or the counter-pressure element opposite it into the fixing position. By reducing the distance between the counter-pressure element and the holding element, the holding element is pressed or pulled back against the plug-in direction back into contact with the locking projection, while the counter-pressure element comes into contact with the opposite side of the locking projection. In other words, the second distance in the fixing position is set so small that the locking projection is contacted both by the holding element and by the counter-pressure element, and is thus received without any axial play between these two elements. The design of the locking device according to the invention thus facilitates the coupling process on the one hand and a rigid, enables completely play-free axial connection between the connector and the mating connector.

The second axial distance between the holding element and the counter-pressure element in the fixing position preferably corresponds to the axial width of the locking projection, so that the locking projection can be received without play in the space between the holding element and counter-pressure element after the actuating device has been moved into the fixing position.

With regard to a user-friendly and simple adjustment in the fixing position and vice versa in the release position, it has proven to be expedient for the counterpressure element to be designed as an adjustable, flexible part, for example as a bent part, and a contact surface for pressing against the connector when coupling facing side of the locking projection by means of the actuating device. When pressing the contact surface of the adjustable bent part against the locking projection, a section of the holding element which extends too far in the plug-in direction and which engages over the locking projection is pulled back until it comes into contact with the opposite side of the locking projection. In other words, the holding element and the housing of the connector rigidly connected to it are retracted so far counter to the plug-in direction until any axial play is removed from the plug connection and the holding element and the bent part are pressed onto the locking projection on both sides. The advantage of a flexible part as a counter-pressure element is also that it can be pressed against the locking projection under a prestress.

Advantageously, however, the holding element is not designed as a flexible part such as a bent part, but as a rigid locking bracket or as a rigid locking tab, which has a pressing surface for pressing against a side of the locking projection facing away from the connector during coupling. The contact surface of the bent part is opposite the contact surface of the holding element at the first distance (release position) or at the second distance (fixing position). A rigid and stable holding element leads to a good and stable locking between the connector and the mating connector.

In an alternative example, the holding element can also have a flexible part, such as an adjustable bent part.

The counterpressure element is preferably designed as the flexible part and has a first axial dimension in the release position and a second axial dimension in the fixing position, which is larger than the first axial dimension. In the release position, the flexible part has the shorter axial dimension and thus projects less towards the holding element, so that the distance between the holding element and the front end of the flexible part is large (first distance). In the fixing position, the flexible part has the larger axial dimension and thus protrudes further towards the holding element, so that the distance between the holding element and the front end of the flexible part is small (second distance), for pressing against the locking projection of the mating connector .

The flexible part can be designed as a leaf spring element which carries the contact surface at its free plug-side end and is fixed to the housing of the connector at its rear end opposite the free end. A counter-pressure element set up as a flexible part or as an elastically adjustable bent part is particularly simple and reliable for changing a predetermined contact pressure by means of the actuating device.

The “distance” between the holding element and the counter-pressure element is understood to mean the distance between the opposing contact surfaces of the holding element and counter-pressure element.

An axial change in length of the bent part can be provided in that the bent part projects further radially outwards in the release position than in the fixing position. The extension component of the bent part which extends radially in the release position can be at least partially bent into an axially extending extension component by means of the actuating device, the bent part being elastically prestressed in the fixing position. The bent part is preferably in the form of a part running under an arc Leaf spring formed, wherein the radially extending in a longitudinal section plane is formed stronger in the release position than in the fixing position in which the bent part is flattened.

In a particularly preferred embodiment of the invention, the bent part is set up in such a way that it can be pressed by means of the actuating device from a radially outward bent position into a flatter and axially elongated position (fixing position).

For this purpose, the actuating device preferably has an actuating section which can be displaced in the axial direction relative to the locking device and which is pushed in the opposite direction (away from the mating connector) for adjustment in the fixing position in the direction of the plug-side end of the connector and / or for adjustment in the release position vice versa. By moving the actuating section in the direction of the plug-side end of the connector, the bending element can be elastically pretensioned against the locking projection of the mating connector. By moving the actuating section back into the starting position, the pretension of the bending element can be released again, whereby the bending element automatically retracts into a relaxed position, in which it presses less strongly against the locking projection of the mating connector.

A particularly simple and user-friendly actuation of the actuating section is possible in that the actuating section is a sleeve part that preferably completely rotates around a housing of the connector, at least in sections. E.g. the actuating section is designed as a plastic sleeve encircling the connector housing that is axially displaceable and that offers the user a particularly large gripping surface. For adjustment to the fixing position, the actuating section can preferably be displaced at least in sections over the bent part, the bent part being able to be pressed from an outwardly bent position into the axially elongated fixing position. A sleeve part offers the further advantage of high rigidity and strength, so that an automatic radial deflection or evasion of the preloaded bent part is reliably prevented when the sleeve part abuts radially on the outside and presses it inwards.

With regard to reliable securing of the connector coupled to the mating connector in the fixing position, the actuating device preferably has a holding mechanism, such as a latching mechanism, for fixing the connector in the fixing position. The latching mechanism leads, for example, to an automatic latching of the sleeve part after its axial displacement in the direction of the mating connector as soon as the counterpressure element is adjusted into the fixing position. The locking mechanism can be formed by the form-fitting interaction of locking tabs and locking projections, which are provided on the one hand on the axially displaceable actuating device and on the other hand on an axially fixed housing of the connector.

The holding mechanism can be released manually to return the actuating device to the release position, for example by actuating one or more release sections which can be provided on the sleeve part.

Known high-current plugs regularly have connector position assurance ("CPA"), which can only be actuated when the connector is in its final position with respect to the mating connector. If actuation of the CPA is not possible, the installer of the connector receives the information that the coupling process is incomplete and the connector is not arranged in its final closed position. This is to prevent the release of current flows due to poorly coupled plug connections.

In the connector according to the invention, such a connector position assurance (CPA) can be provided in that the holding element is at least partially radially outwardly deflectable in the course of coupling with the mating connector, the actuating device being set up such that it only moves into the fixing position is adjustable if the holding element is not deflected radially. The deflection of the holding element radially outward in the course of the coupling process can take place in that the holding element is pushed outwards by oblique guide surfaces of the mating connector until it engages radially inward behind the locking projection. The axially displaceably arranged actuating device strikes a radially deflected holding element which has not yet been snapped back and cannot be pushed into the fixing position. This stop gives the connector fitter the information that the connector is not yet in the final closed position. On the other hand, a radial deflection of the holding element over the locking projection can be prevented by the fact that the actuating device lies against it in the fixing position on the outside.

This CPA is particularly effective when the actuating device is designed as an axially displaceable, circumferential sleeve part which has an opening, such as a window, through which the holding element can only be deflected radially outward when the actuating device is in the release position. If, on the other hand, the actuating device is in the fixing position, the holding element is arranged at least in sections not at the axial height of the opening but at the axial height of the closed sleeve part wall, which prevents radial deflection of the holding element.

The decoupling of a connector from the mating connector can be simplified in that the actuating device has a gripping section for radially deflecting the holding element when moving from the fixing position into the release position, in order to lift it over the locking projection when uncoupling. In other words, not only the counter-pressure element is released from the locking projection, but also the retaining element engaging behind the locking projection is raised by an adjustment of the actuating device from the fixing position to the release position, so that the plug connector can be moved in a simple and user-friendly manner simply by adjusting the actuating device into the release position can be removed from the mating connector. For this purpose, the holding element can have a lever surface, such as an inclined surface, which enables the gripping section of the actuating device to engage and lift it.

The connector according to the invention preferably has at least one or more inner conductors for carrying current, preferably an outer conductor encircling the inner conductor, such as a shield, and additionally a connector housing which has the locking device.

One or more sealing elements, such as silicone or rubber parts, can be provided on the housing for bearing against a sealing surface of the mating connector in order to ensure a water or gas-tight plug connection.

In a particularly preferred embodiment of the invention, the housing of the connector is encircled by the actuating device at least in sections like a sleeve.

With regard to a particularly stable and permanent plug connection between the connector according to the invention and a complementary mating connector, it has proven to be expedient to provide two or more locking devices on two mutually opposite sides of the connector (preferably offset by 180 ° in the circumferential direction), their holding elements or counter-pressure elements can be adjusted by a single actuating device such as a circumferential sleeve part.

According to a further aspect, the invention relates to a plug connection comprising a plug connector according to the invention and a complementary mating plug connector for coupling to the plug connector. The plug connector can have the features described above individually or in any combination, these features not being described again to avoid repetition.

The mating connector has at least one radially outwardly projecting locking projection which can be received in the closed position between the holding element and the counterpressure element of the connector.

By adjusting the counter-pressure element into the fixing position, a contact surface of the counter-pressure element is pressed against the locking projection in such a way that the holding element opposite the counter-pressure element and overlapping the locking projection is pulled back into contact with the other side of the locking projection. The distance between the holding element and the counter-pressure element in the fixing position thus corresponds exactly to the axial dimension of the locking projection (second distance).

Furthermore, the mating connector comprises at least one inner conductor for electrically contacting the inner conductor of the connector in the closed position, preferably an outer conductor surrounding the inner conductor, such as a shield, and additionally a housing from which the locking projection can protrude radially outward. The housing can have a wall in the form of a cylinder jacket, which, in the closed position, lies sealingly against a sealing element of the plug connector.

In order to provide an effective CPA, the mating connector has at least one inclined surface which extends to the locking projection for radially deflecting the holding element when coupling, in order to guide it into the position which engages behind the locking projection. If the holding element is axially at the level of the inclined surface in the course of the coupling process and is deflected radially outward, the actuating element cannot be pushed axially in the direction of the mating connector into the fixing position, since it strikes the radially deflected holding element. An axial displacement of the actuating device is only possible after the retaining element has snapped behind the locking projection.

In order to simplify the coupling process, it has proven to be advantageous that the mating connector has at least one axially extending guide projection and the connector has at least one complementary guide groove, or vice versa, so that the connector can only be inserted into the mating connector in a correct rotational position, in which engage the guide projections in the guide grooves.

Fig. 1

einen erfindungsgemäßen Steckverbinder in einer perspektivischen Ansicht,

Fig. 2

einen erfindungsgemäßen Steckverbinder in einer teilweise im Längsschnitt dargestellten Seitenansicht,

Fig. 3a bis 3c

Schritte beim Verkuppeln des in den Figuren 1 und 2 gezeigten Steckverbinders mit einem Gegensteckverbinder zum Herstellen einer erfindungsgemäßen Steckverbindung, und

Fig. 4

eine Teilansicht der in Fig. 3c gezeigten Steckverbindung im Längsschnitt.

In the description that follows, the invention is described with reference to the accompanying drawings, to which express reference is made to details that are essential to the invention and that are not detailed in the description. It shows:

Fig. 1

a connector according to the invention in a perspective view,

Fig. 2

a connector according to the invention in a side view partially shown in longitudinal section,

3a to 3c

Steps in coupling the in the Figures 1 and 2 shown connector with a mating connector for producing a connector according to the invention, and

Fig. 4

a partial view of the in Fig. 3c shown connector in longitudinal section.

In Fig. 1 One embodiment of a connector 100 according to the invention is shown in a perspective view. Fig. 2 shows the connector 100 in a longitudinal sectional view. The connector 100 is a high-current connector that is attached to the front end of a cable 300 for transmitting high currents. The connector 100 is set up for coupling with a complementary mating connector 200 in the form of a high-current socket, as shown in FIG Fig. 3a is shown on the left.

The plug connector has two inner conductors 5 for current carrying, an outer conductor 6 encircling the inner conductors 5 with a spring cage and a dielectric in the form of an insulating part arranged at least in sections therebetween. The inner conductors 5 are crimped onto the inner conductor of the cable 300, and the outer conductor 6 is crimped onto an outer conductor of the cable. Furthermore, the connector 100 has a housing 7, which is designed as a plastic component and rotates at least in sections around the front end of the cable 300 and the outer conductor 6 of the connector.

A sealing part for sealing is arranged between the connector housing 7 and a cable jacket.

The connector 100 can be pushed axially onto a housing part 205 of the mating connector 200 for coupling in a plug-in direction X. In this case, a second sealing part 310 of the connector comes into sealing contact with the housing part 205 of the mating connector 200.

The connector 100 has a locking device 20 for axially fixing the connector with respect to the mating connector in the closed position without play. The locking device 20 comprises on the one hand a holding element 22 in the form of a locking bracket for axially engaging behind a locking projection 202 of the mating connector 200 and on the other hand a counter pressure element 24 with a flexible leaf spring 26 which is opposite the holding element 22. An intermediate space for receiving the locking projection 202 of the mating connector is formed between a pressing surface of the holding element 22 and a pressing surface of the counter pressure element 24. This space has in the Fig. 2 shown release position I an axial dimension (first distance A1).

As in Fig. 4 is indicated, if the holding element 22 snaps back behind the locking projection 202 when pushed onto the mating connector 200, a small space arises between the holding element 22 and the locking projection 202. In other words, the retaining element 22 does not lie directly against the locking projection 202 after the locking back . This axial play can be eliminated by means of an actuating device 30.

The counterpressure element 24 can be adjusted into a fixing position II by means of the actuating device 30 (see Fig. 4 ), in which it is pressed against the locking projection 202. As a result, the holding element 22, which is designed as a rigid latching bracket, is pulled back into direct contact with the opposite side of the locking projection and thus also presses against the locking projection (see arrow Y in Fig. 4 ). The locking section 202 is thus free of play and under tension in the space between the Holding element 22 and the counter-pressure element 24 added. In the fixing position, the distance between the holding element 22 and the counter-pressure element 24 corresponds to the axial dimension of the locking projection 202 (second distance A2) and is therefore smaller than the first distance A1 in the release position.

The counter-pressure element 24 has the leaf spring 26 running under an arc, the front free end of which has the contact surface and the opposite rear end of which is attached to the housing 7. When an axial compressive force acts on an area of the leaf spring that extends obliquely radially outward, the leaf spring is pressed into a flatter and elongated position in which it protrudes further toward the holding element 22 than in the arcuate, relaxed, initial position.

The actuating device 30 is configured as a sleeve part 32 encircling the housing 7 of the connector, which is held on the housing in an axially displaceable manner. A displacement of the sleeve part 32 in the direction X on the mating connector leads to the fact that an edge section of the sleeve part 32 presses axially against the leaf spring 26 and, as described in the previous paragraph, this forwards in the direction of the holding element 22 or in the direction of the locking projection 202 presses (see Fig. 4 ).

In Fig. 3b are the sleeve part 32 and the leaf spring 26 in the release position I, and in Fig. 3c the sleeve part 32 was axially displaced in the direction X until it strikes a stop on the mating connector. In this fixing position II, the leaf spring 26 is pressed into the flat position described by an outside wall section of the sleeve part 32.

The actuating device 30 has a latching mechanism 35 which, after the adjustment to the fixing position II, automatically leads to an axial fixation of the actuating device 30. The locking mechanism 35 can be released again by pressing two gripping tabs, as a result of which the actuating device can be pulled back into the release position.

As in Fig. 2 is shown, the plug connector has two locking devices 20 provided on the housing 7 offset by 180 °, the counterpressure elements 24 of the two locking devices 20 being simultaneously adjustable by means of the actuating device 30 designed as a sleeve part 32.

The "connector position assurance" CPA provided on the plug connection according to the invention is explained below:
As in Fig. 3a is shown, the housing 205 of the mating connector 200 has inclined surfaces 204, which deflect the holding element 22 of the connector radially outward when coupling, until it engages behind the locking projection 202 and engages behind it. If the holding element 22 is radially deflected and is not yet in its end position behind the locking projection 202, it is not possible to axially shift the sleeve part 32 in the plug-in direction X, since it is impeded by the deflected holding element 22. Moving the sleeve part 32 into the in Fig. 3c Fixing position II shown is only possible when the holding element is engaged in the correct end position. On the other hand, a radial deflection of the holding element 22 is prevented due to the sleeve part wall arranged on the outside of it in the fixing position II, so that the latching mechanism is secured against inadvertent release.

Guide projections 206 arranged on the mating connector, each of which is assigned a complementary guide groove of the connector, ensure that the connector is arranged in a correct rotational position when it is coupled.

The Figures 3a to 3c show three steps in coupling the connector 100 with the mating connector 200 to produce a connector according to the invention:
Fig. 3a shows the connector 100 and the mating connector 200 opposite it before the coupling.

Fig. 3b shows the connector 100 pushed onto the mating connector 200, the holding element 22 already engaging behind the locking projection 202 of the mating connector 200 and preventing the connector from being removed. However, there is still an axial play between the holding element 22, the locking projection 202 and / or the counter pressure element 24. The actuating device is in the release position I, in which the counterpressure element 202 may already be in contact with the locking projection 202, but is not pressed against it by force using the actuating device.

Fig. 3c shows the actuating device 30 after its adjustment to the fixing position II. The holding element 22 and the counter-pressure element 24 are pressed onto the locking projection 202 without play. The counter-pressure element 24 is held by a wall section of the sleeve part 32, at least in sections, in a flat position pressed against the locking projection 202. The locking mechanism 35 prevents an axial adjustment of the sleeve part 32 back into the release position I.

Claims (16)

1. Plugged connection comprising a plug connector (100) and a mating plug connector (200) for coupling with the plug connector, in particular a high current plugged connection, wherein the plug connector comprises a locking device (20) for the play-free axial fixing of the plug connector with respect to the mating plug connector (200) in a closed position coupled to the mating plug connector, wherein the locking device (20) has:

   a retaining element (22) such as a latching clip designed to engage axially behind a locking projection (202) on the mating plug connector in the closed position,

   characterised by a counterpressure element (24) which is located opposite the retaining element (22) in such a way that the locking projection (202) can be accommodated between the retaining element (22) and the counterpressure element (24) in the closed position, and by an actuating device (30) for pressing the retaining element (22) and counterpressure element (24) against the locking projection (202) in a fixing position (II).
2. Plugged connection according to claim 1, characterised in that the retaining element (22) or the counterpressure element (24) can be moved by means of the actuating device (30) from a release position (I) with a first distance (A1) between the retaining element (22) and the counterpressure element (24) into the fixing position (II) with a second distance (A2) between the retaining element and the counterpressure element which is less than the first distance.
3. Plugged connection according to one of the preceding claims, characterised in that the counterpressure element (24) has a flexible part (26) with a pressing surface designed to be pressed against a side of the locking projection (202) facing the plug connector during coupling, and/or that the retaining element (22) is designed as a rigid latching clip and has a pressing surface designed to be pressed against a side of the locking projection (202) which faces away from the plug connector during coupling.
4. Plugged connection according to one of the preceding claims, characterised in that the counterpressure element (24) has a flexible part such as a bending part (26) which has a first axial dimension in the release position (I) and a second axial dimension in the fixing position (II) which is larger than the first axial dimension.
5. Plugged connection according to claim 3 or 4, characterised in that the flexible part (26) projects further, radially outwards, in the release position (I) than in the fixing position (II) and is preferably designed in the form of a leaf spring curving in an arc.
6. Plugged connection according to one of the claims 3 to 5, characterised in that the flexible part (26) can be pressed by means of the actuating device (30) from a release position in which it is bent radially outwards into a flatter fixing position.
7. Plugged connection according to one of the preceding claims, characterised in that the actuating device (30) has an actuating section which can be displaced in an axial direction (X) relative to the locking device (20) and which can be pushed in the direction of the mating plug connector (200) in order to move it into the fixing position (II) and can be pushed away from the mating plug connector (200) in order to move it into the release position (I), or vice versa.
8. Plugged connection according to one of the preceding claims, characterised in that the actuating device (30) has an axially displaceable sleeve part (32) which surrounds a housing of the plug connector, at least in sections, preferably completely.
9. Plugged connection according to claim 8, characterised in that the actuating device (30) can, at least in sections, be displaced beyond the flexible part (26) and thereby presses this into the flat fixing position (II) in which it is preloaded against the locking projection (202).
10. Plugged connection according to one of the preceding claims, characterised in that the actuating device (30) can be fixed releasably in the fixing position (II) by means of a retaining mechanism (35), for example snap-locking tabs.
11. Plugged connection according to one of the preceding claims, characterised in that the retaining element (22) is designed so as to be able to deflect radially outwards, at least in sections, during the course of coupling with the mating plug connector (200), wherein the actuating device (30) is designed such that it can only be moved into the fixing position (II) if the retaining element (22) is not radially deflected.
12. Plugged connection according to claim 12, characterised in that the actuating device (30) has a grip section (27) for radial deflection of the retaining element (22) during movement from the fixing position (II) into the release position (I) in order to lift this over the locking projection during decoupling.
13. Plugged connection according to one of the preceding claims, characterised by at least one inner conductor (5) for conducting current, an outer conductor (6) such as a shielding surrounding the inner conductor and a plug connector housing (7) which includes the locking device (20) and which is surrounded in a sleeve-like manner by the actuating device (30).
14. Plugged connection according to one of the preceding claims, characterised by two locking devices (20) on two opposite sides of the plug connector, the retaining elements (22) or counterpressure elements (24) of which can be moved by means of the actuating device (30).
15. Plugged connection comprising a plug connector (100) according to one of the preceding claims and a complementary mating plug connector (200) designed to be coupled with said plug connector, wherein the mating plug connector has at least one locking projection (202), projecting radially outwards, which in the closed position can be accommodated between the retaining element (22) and the counterpressure element (24) of the plug connector.
16. Plugged connection according to claim 15, characterised in that the mating plug connector (200) has at least one sloping surface (204) extending towards the locking projection (202) in order to deflect the retaining element (22) radially during coupling in order to guide this into the position in which it engages behind the locking projection (202).

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