Plug connector

Abstract

The invention relates to a plug connector (1) for interconnecting with a mating plug connector (60) along an insertion direction (E). The plug connector (1) has a housing (2) having an interior space (3) and a contact element (20) arranged in the interior space (3). The plug connector (1) also has a connector position assurance device (CPA, 4). The housing (2) has a pressure balancing element (5) for balancing the pressure of the interior space (3) relative to an exterior space (6) of the housing (2). The CPA (4) is arranged at the housing (2) and can be moved relative to the housing (2) between a first position (P1) and a second position (P2), wherein a sealing element (30) is provided at the CPA (4), wherein in the second position (P2), the pressure balancing element (5) is sealed relative to the exterior space (6) by the sealing element (30).

Description

Technical Field

[0001] The invention relates to a plug connector. Background Art

[0002] As is known from the background art, it can be advantageous for the functioning of an electrical plug connection consisting of a plug connector and a mating plug connector if, after the insertion process or the interconnection process, the electrical plug connection is in a defined plug position. This defined plug position or plugged state or connected position or connected state can be, for example, an end position. In the defined plug position, the plug connection can be locked, for example, in an end stop position.

[0003] In order to indicate to the operator or fitter the existence of the defined plug position, additional actuating elements, so-called connector position assurance devices (CPA) or also control slides, are usually installed. These actuating elements are easily recognizable to the operator and can only be moved or displaced into an end position when the plug connection is in the defined plug position.

[0004] A specific embodiment of a CPA is known, for example, from DE 299 04 381 U1, in which the CPA is referred to as a control slide valve.

[0005] A CPA and a plug connector assembly having a CPA are known from DE 10 2014 206 431 A1. Summary of the invention

[0006] The invention is based on the recognition that the defined plug position of the plug connection should be reliably identified by the operator or the assembler and that the interior space of the plug connector assembly consisting of the plug connector (or the plug connector) and the mating plug connector (or the mating plug connector) should be designed to be medium-tight with respect to the external space in the interconnected state. Thus, on the one hand, a reliable electrical connection should be achieved and on the other hand, the durability of the electrical connection in the interior space should be ensured. Here, the durability can be achieved by preventing or at least interrupting the entry of fluid media (such as liquids or also gases) as well as dirt, particles and dirt to a large extent. However, when the plug connector and the mating plug connector are interconnected, the (common) interior space volume enclosed by the plug connector and the mating plug connector is reduced. As soon as the sealing effect is applied from the sealing position or the sealing state in the case of mutual connection, the air located in the interior space volume can no longer easily leak out in the further mutual connection, so that the plug resistance or the plug force is significantly increased.

[0007] The provision of a sealing effect which is only applied very late (for example close to a defined plug-in position) can be avoided due to technical requirements and / or customer requirements.

[0008] There may therefore be a need to provide a plug connector in which reaching a defined plug position can be easily and reliably detected (e.g. even under conditions of limited visibility) and in which the interior of the plug connector is sealed relative to the exterior of the plug connector or the external environment in the state of interconnection with the mating plug connector. At the same time, the plugging force of the plug connector in the case of interconnection with the mating plug connector should be as low as possible. An increase in the plugging force in the case of interconnection caused by the air volume enclosed in the interior space should be avoided as far as possible. Similarly, when the plug connector and the mating plug connector are disconnected from each other, the necessary force caused by work done relative to the negative pressure, which is generated by the expansion of the volume of the sealed internal space, should not be increased as far as possible.

[0009] The advantages of the present invention will be described in detail below.

[0010] According to a first aspect of the present invention, a plug connector for interconnecting with a mating plug connector along an insertion direction is proposed. The plug connector has a housing having an internal space and contact elements arranged in the internal space. In addition, the plug connector has a connector positioning assurance device (CPA). The housing has a pressure balancing element for balancing the pressure of the internal space relative to the external space of the housing. The CPA is arranged or installed at the housing and can move relative to the housing between a first position and a second position. A sealing element or a sealing device is arranged at the CPA, wherein, in the second position, the pressure balancing element is sealed relative to the external space by the sealing element.

[0011] In other words: in the plug connector, it is provided that the CPA is connected to a sealing element. Thus, by moving the CPA into its end position (second position) which represents the correct plug position, the pressure equalization element also seals the interior. The sealing element does not need to have a valve function for this. When the plug connections are disengaged or disconnected from one another, the CPA must first be moved back from the second position (for example into the initial position) so that the seal of the pressure equalization element can be released again.

[0012] The CPA can be fixed to the housing in a manner that prevents loss and can be moved. The CPA can be configured, for example, in a guide rail.

[0013] The advantageous effect resulting from this is that the correct interconnection of the plug connector with the mating plug connector can be easily, safely and reliably identified with the aid of the CPA. At the same time, the plug-in force or disconnection force is not increased by the air volume captured or contained in the inner space, because the air volume can be connected or exchanged with the outer space or the external environment of the plug connector with the aid of the pressure equalization element. Advantageously, no overpressure that increases the plug-in force is generated in the inner space in the case of interconnection. It is also advantageous that the formation of a negative pressure in the inner space that can increase the disconnection force is offset when disconnecting the plug connection. Finally, it is advantageously ensured that the plug connector achieves a sealed plug connection. Because although pressure equalization and thus fluid flow exchange are achieved during the interconnection with the mating plug connector, it is also ensured that the inner space is sealed relative to the outer space after the plug-in process is completed and the CPA is actuated.

[0014] In this way the CPA advantageously achieves multiple functions:

[0015] The CPA realizes the verification of the correct plug-in state or plug-in position;

[0016] Furthermore, by making the CPA seal the pressure equalization element, the CPA, in the connected state, together with the sealing device, produces a tight seal of the inner space relative to the outer space (medium);

[0017] Finally, during the plugging process or during the disconnection process, the CPA interacts with the pressure equalization element in such a way that the force required for this purpose is not increased unnecessarily, since during the plugging process or during the disconnection process, the CPA is not in the second position, but is, for example, in the first position, and the pressure equalization element is not sealed by the sealing device.

[0018] It is understood that exactly one contact element can be arranged, for example inserted, in the interior space, but also a plurality of contact elements, for example two or also more than two contact elements can be arranged in the interior space.

[0019] A contact chamber can be arranged in the inner space of the plug connector, which is provided for accommodating the contact element. It should be understood that a plurality of contact chambers can also be arranged in the inner space. A plurality of contact elements can be arranged in one contact chamber. It is also possible to arrange exactly one contact element in each contact chamber.

[0020] The contact element can be locked in the contact chamber, for example. For this purpose, a locking lance that can be reversibly deflected elastically can be provided on the contact element, and an undercut can be provided in the contact chamber. It is also possible to provide a locking lance on the wall of the contact chamber, which then engages in the undercut of the contact element.

[0021] The contact element can have, for example, one or more contact lamellae which bring about a reliable electrical contact with an inserted or adjacently arranged mating contact element.

[0022] The contact element can be provided for contacting a mating contact element of a mating plug connector. The contact element can be designed, for example, as a bent part made of sheet metal and have a contact box into which the mating contact element can be inserted. The contact element can be electrically connected to a wire or cable.

[0023] The mating contact element can be designed, for example, as a pin, a contact lug or the like.

[0024] It should be understood that the mating contact element can also be configured in the form of a female contact and the contact element can be configured in the form of a male contact.

[0025] In the second position, the CPA together with the sealing means seals the pressure equalization element with respect to the environment outside the housing.

[0026] It is further understood that, in order to seal the plug connection, further sealing elements can be provided at the plug connector or at the mating plug connector. These further sealing elements can be arranged, for example, in the region of a cable lead-through through the housing. A radial seal can also be provided, which is arranged between the housing wall of the plug connector and the housing wall of the mating plug connector in the mutually connected state. Alternatively, the seal can also be produced by an external sealing element.

[0027] In the context of the present application, unless otherwise indicated in the text, a radial direction is understood to be a direction perpendicular to the insertion direction and a circumferential direction is understood to be a direction extending circumferentially around the insertion direction.

[0028] By arranging the CPA in such a way that the CPA can only be moved into the second position when the plug connector and the mating plug connector are connected to each other in a defined plug position, the advantageous effect is achieved that the fitter or operator can always reliably detect that the plug connection consisting of the plug connector and the mating plug connector is correctly connected to each other. The correct connection, i.e., for example, the end position, the end stop position, etc. (and therefore the defined plug position), can be reliably detected even under poor visibility conditions or under narrow assembly conditions, since the CPA can only be moved when a defined position is reached. Before the plug connector and the mating plug connector are connected to each other, the CPA can, for example, first be located in the first position.

[0029] A mechanical lock can be provided which prevents the CPA from being moved into the second position as long as the defined plug position has not yet been reached. The movement can be caused, for example, by a movement or rotation of the CPA relative to the plug connector (for example along a guide structure, along a guide slot). Only after reaching the defined plug position can the mechanical lock for the CPA be overcome so that the CPA can be moved into the second position.

[0030] By forming the pressure equalization element in the housing via an opening, a pressure equalization element or a plug connector housing can be provided which can be produced particularly simply and cost-effectively.

[0031] It is understood that there can be exactly one opening. However, there can also be a plurality of openings, which are arranged close to one another, for example. In the case of a plurality of openings, which then form the pressure equalization element, in the second position of the CPA, all openings are sealed relative to the outside space by the sealing element or sealing means of the CPA.

[0032] The opening or passage can be, for example, an opening in the wall of the housing. This opening, for example, connects the interior of the housing with the exterior, so that the air in the interior can communicate or exchange with the air from the exterior. The opening can preferably be an opening that is not an opening for inserting the mating plug connector. The opening is located, for example, in the sealed part of the interior, i.e., on the side of an existing radial seal, for example.

[0033] The fact that the opening is covered by a film, wherein the film is designed to be waterproof but air-permeable, has the advantageous effect that the risk of liquids or also dirt, dirt or dust entering the interior space is minimized as long as the CPA has not yet been moved into the second position. This advantageously protects the interior space, for example, when transporting the plug connector or when using the plug connector. Furthermore, this advantageously prevents dirt, dirt, particles or also liquids from being able to enter the interior space from the exterior space through the opening after the CPA has been moved from the second position to the first position when disconnecting the plug connector. This is important, for example, in the automotive sector when disconnecting a plug connection in the engine compartment, because the surroundings of the plug connection and also the plug connection itself can gradually become dirty in the engine compartment and can also be exposed to moisture.

[0034] In a further development, the sealing element is designed as a stopper, wherein the sealing element is introduced into the opening in the second position of the CPA. This has the advantageous effect that the opening is sealed simply, safely and durably. Advantageously, a sealing element designed in this way is also particularly robust under challenging operating conditions, such as large temperature fluctuations, vibrations, etc. In this case, the stopper can be introduced into the opening, for example, like a cork in a bottle.

[0035] Alternatively or additionally, provision can be made that in the second position of the CPA the sealing element (preferably of elastic design) is fully extended over the entire surface. Pressed onto the opening. Here, the sealing element is, for example, especially pressed onto the edge of the opening or onto the periphery of the edge, and the sealing element simultaneously covers the opening over its entire surface. Advantageously, the sealing element has a flat or planar surface in the area in contact with the edge to avoid leakage. This advantageously achieves a particularly simple seal. It is also advantageous that the edge of the opening is also protected from contamination. Finally, such a sealing element can be manufactured particularly cost-effectively, because as long as the edge of the opening is reliably covered, the seal is ensured independently of the dimensional tolerances of the sealing device. In addition, when an overpressure suddenly occurs in the interior space, the sealing device constructed in this way can advantageously act in the form of an overpressure valve.

[0036] Alternatively or additionally, it can be provided that the sealing element is designed in the form of a sleeve, wherein in the second position of the CPA, the sealing element is placed over the opening. In other words: the sealing element is placed over the edge of the opening and covers the opening over its entire surface, for example a crown cap of a bottle outlet, wherein the sealing function can also be produced here, for example, by the inner wall of the sleeve being in contact with the outer wall of the opening. This provides a particularly simple sealing device, which produces a reliable seal even in the case of distance tolerances relative to the opening. The sealing can be ensured by the wall of the sleeve (which can also be referred to as a collar) even in the case of distance tolerances corresponding to the height of the collar.

[0037] Alternatively or additionally, the sealing element can be designed as an O-ring, wherein the sealing element rests against the housing in the second position of the CPA and completely surrounds the edge of the opening. This provides a particularly simple and cost-effective sealing device. The O-rings are available in a large selection of different opening sizes and diameters, so that even when the opening size or opening diameter changes, correspondingly matching O-rings can be easily and cost-effectively selected for different plug connectors and thus the seal can always be ensured. It is also possible to easily and cost-effectively select and use matching O-rings for different housing materials or for different operating conditions.

[0038] It is understood that not only a single sealing device can be arranged at the CPA. It is also possible to provide two or more sealing devices. This can occur, for example, if a plurality of openings constitute the pressure equalization element. However, it can also be provided that the seal is particularly reliably constructed by a gradation of a plurality of seals. Thus, merely by way of example, the sealing element can be a plug surrounded by an O-ring. Of course, a 2-stage or even 3-stage combination of all other sealing devices is also possible, for example a sealing device constructed as a plug surrounded by a sleeve, which in turn is surrounded by an O-ring.

[0039] It should be understood that the sealing device can be made of, for example, an elastic material, such as rubber, silicone, etc.

[0040] In a modification, a tubular connection piece is provided at the opening, wherein a further opening is provided at the connection end of the connection piece facing away from the opening, wherein the CPA has a first end which, at least in the second position, faces the connection end of the connection piece, wherein the sealing element is arranged at the first end of the CPA. This has the advantageous effect that the risk of the opening being undesirably covered or closed in a state not closed by the CPA or the sealing element and of the pressure balance between the interior and the exterior being undesirably impeded is reduced. Furthermore, this advantageously prolongs the distance from the exterior to the interior, so that any dirt or moisture that may penetrate can first be deposited on the inner wall of the connection piece and does not first reach the interior. Finally, this advantageously enables the direction of the air outlet or the air inlet relative to the opening to be changed or rotated, so that a simpler sealing is possible by the CPA and its predetermined movement direction.

[0041] The tubular connection piece can be in the form of a channel, for example, through which the air from the interior can communicate with the exterior. The connection piece can also have, for example, a bend, so that the further opening points in a direction different from the opening in the housing. This can further advantageously reduce the penetration of dirt or moisture into the interior. However, the connection piece can also be designed to be straight, so that the further opening points in the same direction as the opening in the housing.

[0042] The pipe connection can thus produce advantageous effects, such as reducing the distance to the sealing means arranged on the CPA. It can also produce an advantageous effect that the further opening is oriented in such a way that the sealing means can reliably seal the interior relative to the exterior when the CPA is moved into the second position. Depending on the design of the plug connector, i.e. the arrangement of the CPA on the housing, the movement direction of the CPA and the position of the opening in the housing, the pipe connection can simplify the function of the sealing concept or can be implemented without extensive modifications to the plug connector. In this way, the concept can also be advantageously implemented in existing plug connectors with low effort.

[0043] By arranging the sealing element at the first end face of the CPA, a particularly simple production of the CPA is advantageously achieved. In addition, a sealing element that may be damaged can advantageously be replaced particularly simply in this way. The first end face points, for example, in a direction that is defined by the movement of the CPA from the first position into the second position. This advantageously ensures that the sealing element in the second position is plugged or pressed into the opening or the other opening (for example as a plug) and / or is pressed onto the edge of the opening or the other opening and covers the opening or the other opening (for example as a flat or planar sealing element in the region of the opening edge) and / or is slipped onto the edge of the opening or the other opening (for example as a sleeve).

[0044] It can be provided that the sealing element is designed as a plug, wherein the sealing element is introduced into the other opening of the pipe connection in the second position of the CPA. This advantageously produces a particularly safe, reliable and robust seal. The above-mentioned advantages for the embodiment as a plug apply here analogously.

[0045] Alternatively or additionally, it can be provided that the sealing element is pressed over the entire surface onto the other opening of the pipe connection piece in the second position of the CPA. This results in a cost-effective production of the sealing element, since, for example, a larger diameter tolerance of the other opening or a larger surface tolerance of the sealing element is possible. Advantageously, the sealing element has a flat or planar surface in the region of contact with the edge in order to avoid leaks. The advantages described above for pressing over the entire surface apply analogously here, in particular also the possible function as a pressure relief valve.

[0046] Alternatively or additionally, the sealing element can be designed in the form of a sleeve, wherein the sealing element is placed onto the connection end of the pipe connection piece in the second position of the CPA. This provides a particularly simple sealing device, which produces a reliable seal even with tolerances in its distance to the other opening. The sealing can also be ensured by the wall of the sleeve (which can also be referred to as a collar) with distance tolerances corresponding to the height of the collar. In the case of the pipe connection piece, the sealing device or sealing element designed in the form of a sleeve can also be designed, for example, as an O-ring, which in the second position of the CPA surrounds and seals the edge of the pipe connection piece in the region of the other opening.

[0047] The advantages mentioned above for the configuration as a sleeve and the embodiment as an O-ring apply analogously here.

[0048] According to a second aspect of the present invention, a plug connector assembly is provided. The plug connector assembly comprises the above-mentioned plug connector. In addition, the plug connector assembly comprises a mating plug connector, which has a mating plug connector housing, wherein a mating contact element for contacting the contact element is arranged in the mating plug connector housing.

[0049] In the state in which the plug connector and the mating plug connector are connected to one another, a plug connection is formed.

[0050] Advantageously, in the plug connector assembly, it is possible to safely and reliably determine with the aid of the CPA whether the defined plug position (e.g., end state, end stop position, end position, etc.) has been reached. Furthermore, the pressure equalization element ensures low plugging forces during the mutual connection or low disconnection forces during the mutual disconnection or during the disconnection of the plug connection. Finally, it is advantageously ensured that in the connected state, when the CPA is moved into the second position, no fluid medium, in particular no liquid, and no dirt or contaminants from the outside can enter through the pressure equalization element into the plug connector or into the interior of the plug connection or into the common interior of the plug connector and the mating plug connector.

[0051] By sealing the interior of the housing relative to the exterior of the housing in the state in which the plug connector and the mating plug connector are connected to each other in a defined plugged position and in the state in which the CPA is moved into the second position, a safe, reliable electrical connection between the contact element and the mating contact element is advantageously achieved during the service life. If more than one contact element-mating contact element pair is provided in the plug connector assembly, the risk of corrosion of the contact elements and / or mating contact elements is also reduced, as is the risk of short circuits (caused, for example, by moisture in the interior). BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Those skilled in the art will be able to learn other features and advantages of the present invention from the following description of exemplary embodiments (however, the exemplary embodiments do not limit the present invention) with reference to the accompanying drawings.

[0053] Figure 1a A schematic cross section shows a plug connector and a mating plug connector (plug connector assembly) in a non-interconnected plug position together with a CPA in a first position;

[0054] Figure 1b Shown from Figure 1aa plug connector assembly after establishing a plug connection in a defined plug position, in which the CPA is still located in the first position;

[0055] Figure 1c Shown from Figure 1b a plug connection in which the CPA has been moved into a second position;

[0056] Figure 2a A schematic cross section shows a further plug connector and a further mating plug connector (a further plug connector assembly) in a non-interconnected plug position together with a CPA in a first position;

[0057] Figure 2b Shown from Figure 2a a plug connector assembly after establishing a plug connection in a defined plug position, in which the CPA is still located in the first position;

[0058] Figure 2c Shown from Figure 2b , in which the CPA has been moved into the second position. DETAILED DESCRIPTION

[0059] Figure 1a A schematic cross section of a plug connector assembly 100 is shown, which has a plug connector 1 and a mating plug connector 60 .

[0060] The plug connector 1 is provided for interconnection with the mating plug connector 60 along the insertion direction E. The plug connector 1 has a housing 2, which has an interior space 3 and a contact element 20 arranged in the interior space 3, wherein a plurality of contact elements 20 can also be provided, of which only one is visible in the cross section shown. The plug connector 1 has a connector position assurance device (CPA, 4). The housing 2 has a pressure equalization element 5 for pressure equalization of the interior space 3 relative to an exterior space 6 of the housing 2. The CPA 4 is arranged at the housing 2 and can be moved relative to the housing 2 between a first position P1 and a second position P2. A sealing element 30 is provided at the CPA 4, for example, indirectly or directly fixed or mounted in a verriger-proof manner. In order to achieve the interconnection of the plug connector 1 and the mating plug connector 60 without increasing the plugging force, and in addition to detecting that a defined plugging position has been reached, and at the same time to prevent moisture, dust or dirt from penetrating into the inner space 3 in the interconnected state, it is provided that in the second position P2 the pressure equalization element 5 is sealed relative to the outer space 6 by the sealing element 30 (see Figure 1c ).

[0061] The radial direction R extends perpendicularly to the insertion direction E and the circumferential direction U circumscribes the insertion direction E.

[0062] The plug connector 1 is connected to a first cable 50 or has this first cable 50. Viewed from the inside out, the first cable 50 has a first conductor 52 and a first insulation 51, which surrounds the first conductor 52. In principle, a shielding conductor (Schirmungsleiter) and an outer insulation can also be provided, which surrounds the shielding conductor. The first cable 50 can also have a plurality of first conductors 52. For example, each contact element 20 can be connected to a first conductor 52 respectively. An electrical connection of a plurality of contact elements 20 to a first conductor 52 is also possible. The first conductor 52 can be configured for example to transmit a signal. However, the first conductor 52 can also be configured for transmitting high currents (for example, greater than 10A or even greater than 50A) and / or for applying high voltages (for example, greater than 40V or even greater than 100V or even greater than 400V). In order to transmit high currents, the first conductor 52 can have, for example, a diameter greater than 1 mm. 2 Or larger than 4mm 2 cross section.

[0063] The mating plug connector 60 has a mating plug connector housing 61, wherein a mating contact element 62 for contacting the contact element 20 is arranged in the mating plug connector housing 61. The mating contact element 62 can be designed, for example, as a pin or a contact strip (male contact). In principle, the mating contact element 62 can also be designed, for example, as a female contact, or it can be provided that the contact element 20 and the mating contact element 62 are designed in the form of a strip, which is pressed against each other in the contact state. It is also possible to arrange a plurality of mating contact elements 62 in the mating plug connector 60 or at the mating plug connector 60.

[0064] The mating plug connector 60 is connected to a second cable 70 or has this second cable 70. Viewed from the inside out, the second cable 70 has a second conductor 72 and a second insulation 71, which surrounds the second conductor 72. In principle, a shielding conductor and an outer insulation can also be provided, which surrounds the shielding conductor. The second cable 70 can also have a plurality of second conductors 72. For example, each mating contact element 62 can be connected to a second conductor 52 respectively. An electrical connection of a plurality of mating contact elements 62 to a second conductor 72 is also possible. The second conductor 72 can be configured for example to transmit a signal. However, the second conductor 72 can also be configured for transmitting high currents (for example, greater than 10A or even greater than 50A) and / or for applying high voltages (for example, greater than 40V or even greater than 100V or even greater than 400V). In order to transmit high currents, the second conductor 72 can have, for example, a thickness greater than 1 mm. 2 Or larger than 4mm 2 cross section.

[0065] A contact chamber 11 for accommodating a contact element 20 is arranged in the interior space 3 of the plug connector 1. A plurality of contact chambers 11 can also be arranged in the interior space 3. In each contact chamber 11 there can be exactly one contact element 20, but it is also possible to place (for example insert) a plurality of contact elements 20 in each contact chamber 11. Figure 1a Only one contact chamber 11 can be seen in the cross section of FIG.

[0066] The contact element 20 has a contact box 23, into which the mating contact element 62 of the mating plug connector 60 can be inserted through an insertion opening 26 arranged at the front, i.e. facing the mating plug connector 60. For example, contact sheets 24 (two contact sheets 24 can be seen here) can be arranged inside the contact box 23, which contact sheets 24 are in the mutually connected state ( Figure 1c ) establishes or ensures or improves electrical contact with the mating contact element 62. Merely by way of example, a conductor clamp 22 for fixing the first conductor 52 and an insulation clamp 21 for fixing the first insulation 51 are provided at the rear end of the contact element 20. In addition, the contact box 23 has, for example, a reversibly elastically movable locking lance 25, by means of which the contact element 20 can be latched at an undercut 12 of the contact chamber 11 in the contact box 23.

[0067] In the illustrated embodiment, a radial seal 13 is provided or arranged or mounted at the front end of the housing 2. This radial seal 13 seals the interior space 3 relative to the exterior space 6 in the state of interconnection with the mating plug connector 60 and thus prevents moisture, liquids, dust and dirt from penetrating into the interior space 3.

[0068] Here, the CPA 4 is arranged in such a way that the CPA 4 can be moved into the second position P2 only when the plug connector 1 and the mating plug connector 60 are connected to each other in a defined plug position. If this defined plug position is not reached, a mechanical barrier can be provided, for example, to prevent the CPA 4 from moving or rotating from the first position P1 to the second position P2. At the same time, it can be provided that the plug connection can only be released, that is, the plug connector 1 can be separated from the mating plug connector 60, only when the CPA 4 is moved in advance so that it is no longer in the second position P2. This can be caused by a movement or rotation of the CPA 4 in the direction of the first position P1 or even into the first position P1. By this movement, the sealing of the pressure equalization element 5 relative to the external space 6 is also released.

[0069] In the embodiment shown, the pressure equalization element 5 is formed in the housing 2 via an opening 7, wherein other types of pressure equalization elements 5 are also conceivable, such as a multi-part housing 2, wherein the housing parts are, for example, movable relative to one another. In this embodiment, this opening 7 is located in the side wall 14 of the housing. However, it is also possible that the opening 7 is located at the bottom 15 of the housing 2, near the first cable 50. The opening 7 can be arranged, for example, behind the radial seal 13 provided by way of example in this embodiment, i.e. deeper into the interior 3.

[0070] exist Figures 1a to 1c In the embodiment of the present invention, a tubular pipe connector 40 is provided at the opening 7, wherein another opening 42 is provided at the connecting end 41 of the pipe connector 40 which faces away from the opening 7. Here, the pipe connector 40 has a curved shape, so that the another opening 42 points in the direction opposite to the insertion direction E, and the opening 7 points from the inner space 3 to the outer space 6 along the radial direction R. Therefore, the pipe connector 40 is rotated 90°. As a result, moisture or dirt intruding into the another opening 42 can be first deposited on the inner wall of the pipe connector 40. As a result, the risk of dirt and moisture entering the inner space 3 is reduced.

[0071] Here, the CPA 4 has a first end 9, which, at least in the second position P2, faces the connection end 41 of the pipe connection 40. Here, the sealing element 30 is arranged at the first end 9 of the CPA 4. In this embodiment, the sealing element 30 is designed as a plug 31, which, by way of example, is designed with a plurality of grooves. Preferably, the plug 31 has an overdimension with respect to the further opening 42, so that when the plug is introduced, inserted or pressed into the further opening 42, it seals the further opening 42. The plug 31 can have, for example, an elastic material (for example rubber or plastic or cork), so that the sealing function is maintained, for example, even in the event of temperature fluctuations.

[0072] exist Figures 1a to 1c In the embodiment of the present invention, the sealing element 30 is arranged at the first end face 10 of the CPA 4. Here, the first end face 10 points in the direction defined by the movement of the CPA 4 from the first position P1 to the second position P2. In the embodiment shown, the CPA 4 can be moved from the first position P1 to the second position P2 by moving from top to bottom, i.e. along the insertion direction E.

[0073] Figure 1b Shown from Figure 1a 1 shows the plug connector assembly 100 after the plug connection is established in a defined plug position, in which the CPA 4 is still located in the first position P1. Therefore, the operator or assembler has established the plug connection in the correct plug position or plug state. However, the CPA 4 has not yet moved, so that the other opening 42 at the pipe connector 40 is still open, and medium exchange or fluid communication from the inner space 3 to the outer space 6 is still possible.

[0074] Figure 1c Shown from Figure 1b 4 , in which the CPA 4 has been moved into the second position P2 (in the direction of the arrow shown in the CPA 4). The sealing element 30 in the form of the plug 31 is now introduced into the further opening 42 and thus seals the interior space 3 relative to the exterior space 6.

[0075] In principle, it is also possible to arrange or install a film at the opening 7 and / or at the further opening 42 or in the pipe connection piece 40 (see Figures 2a to 2c ), the film is breathable but not liquid-permeable. This can additionally prevent the intrusion of dust, dirt and liquids.

[0076] Figures 2a to 2c Other plug connector assemblies 100 are shown.

[0077] Figure 2a A schematic cross section is shown of a further plug connector 1 and a further mating plug connector 60 in a non-interconnected plug position together with the CPA 4 in a first position P1 .

[0078] From Figure 2a The plug connector 1 in the Figure 1a The difference between the plug connector 1 in Figure 2a In the plug connector 1 in FIG. 1 , a film 8 is arranged on the side of the opening 7 facing the interior space 3. This film 8 is, for example, air-permeable, but liquid-tight. Thus, when the plug connector 1 is connected to a mating plug connector 60, air can escape from the interior space 3, but the ingress of (liquid) water as well as dust and dirt is prevented or at least greatly reduced.

[0079] Furthermore, in the plug connector 1 shown here, no pipe connection piece 40 is arranged on the pressure equalization element 5 which is designed with an opening 7 .

[0080] The sealing element 30 is arranged on the surface 18 of the CPA 4, wherein the surface 18 faces the housing 2. Here, the sealing element 30 is configured, for example, as an O-ring 32. However, the sealing element 30 can also be configured in the form of a sleeve or in another form.

[0081] In the first position P1 of the CPA 4 , the opening 7 is open, so that a fluid-conducting connection is produced between the interior 3 and the exterior 6 .

[0082] Figure 2b Shown from Figure 2a The plug connector assembly 100 in FIG. 1 is shown after the plug connection is established in the defined plug position. However, the CPA 4 is still located in the first position P1, so that the opening 7 is still open.

[0083] Figure 2c Shown from Figure 2b, in which the CPA 4 has been moved into the second position P2 by an operator or an assembler, for example. The sealing element 30 or sealing device in the form of an O-ring 32 rests on the housing 2 and completely surrounds the edge of the opening 7. As a result, no air can now escape from the interior space 3 or penetrate into this interior space 3, because the interior space 3 is sealed from the mating plug connector housing 61 by the radial seal 13 on the side facing the mating plug connector 60. On the opposite side of the opening 7, the surface 18 or the CPA 4 prevents a liquid connection or liquid conduction between the interior space 3 and the exterior space 6.

[0084] Finally, it should be noted that the plug connector 1 or the plug connector assembly 100 is or can be intended for or suitable for or provided for use in a motor vehicle. However, the plug connector 1 is not limited to such an application or use.

Claims

1. A plug connector for interconnecting with a mating plug connector (60) along an insertion direction (E), the plug connector (1) comprising: A housing (2) having an interior space (3) and a contact element (20) arranged in the interior space (3); --Connector position assurance device (4); in, The housing (2) has a pressure balancing element (5) for balancing the pressure of the internal space (3) relative to the external space (6) of the housing (2), wherein the connector position assurance device (4) is arranged at the housing (2) and is movable relative to the housing (2) between a first position (P1) and a second position (P2), Wherein, a sealing element (30) is provided at the connector position ensuring device (4), In the second position (P2), the pressure equalization element (5) is sealed relative to the exterior space (6) by the sealing element (30).

2. The plug connector according to claim 1, wherein: The connector position assurance device (4) is arranged in such a way that the connector position assurance device (4) can be moved into the second position (P2) only when the plug connector (1) and the mating plug connector (60) are connected to each other in a defined plug position.

3. The plug connector according to claim 1, wherein: The pressure equalization element (5) is formed in the housing (2) via an opening (7).

4. The plug connector according to claim 3, in, The opening (7) is covered by a film (8), The film (8) is configured to be waterproof and breathable.

5. The plug connector according to claim 3 or 4, in, The sealing element (30) is designed as a plug (31), wherein, in the second position (P2) of the connector position assurance device (4), the sealing element (30) is introduced into the opening (7), or wherein, in the second position (P2) of the connector position assurance device (4), the sealing element (30) is pressed onto the opening (7) over its entire surface, or The sealing element (30) is constructed in the form of a sleeve. Wherein, in the second position (P2) of the connector position assurance device (4), the sealing element (30) is sleeved onto the opening (7), or The sealing element (30) is configured as an O-ring (32). In the second position (P2) of the connector position assurance device (4), the sealing element (30) abuts against the housing (2) and completely surrounds the edge of the opening (7).

6. The plug connector according to claim 3 or 4, in, A tubular pipe connector (40) is provided at the opening (7). wherein a further opening (42) is provided at a connecting end (41) of the pipe connector (40) facing away from the opening (7), wherein the connector position assurance device (4) has a first end (9) which faces the connecting end (41) of the pipe connector (40) at least in the second position (P2), Wherein, the sealing element (30) is arranged at the first end (9) of the connector position assurance device (4).

7. The plug connector according to claim 6, in, The sealing element (30) is arranged at the first end surface (10) of the connector position assurance device (4), The first end surface (10) points to a direction defined by the movement of the connector position assurance device (4) from the first position (P1) to the second position (P2).

8. The plug connector according to claim 6, in, The sealing element (30) is designed as a plug (31), wherein, in the second position (P2) of the connector position assurance device (4), the sealing element (30) is introduced into another opening (42) of the pipe connection piece (40), or wherein, in the second position (P2) of the connector position assurance device (4), the sealing element (30) is pressed onto the other opening (42) of the pipe connection piece (40) over its entire surface, or The sealing element (30) is constructed in the form of a sleeve. Wherein, in the second position (P2) of the connector position assurance device (4), the sealing element (30) is sleeved onto the connecting end (41) of the pipe connector (40).

9. A plug connector assembly having: - A plug connector (1) according to any one of claims 1 to 8; a mating plug connector (60) having a mating plug connector housing (61), in, A mating contact element (62) for contacting the contact element (20) is arranged in the mating plug connector housing (61).

10. Plug connector assembly, have: - A plug connector (1) according to claim 2, a mating plug connector (60) having a mating plug connector housing (61), in, A mating contact element (62) for contacting the contact element (20) is arranged in the mating plug connector housing (61). In which, when the plug-in connector (1) and the mating plug-in connector (60) are connected to each other in a defined plug-in position and the connector position assurance device (4) has been moved to the second position (P2), the internal space (3) of the shell (2) is sealed relative to the external space (6) of the shell (2).

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