DE202022101727U1 - Connector, in particular for a DC connection - Google Patents

Abstract

Plug connector (10) for an electrical connection, in particular for a DC connection,
- With a first plug contact (11) which forms at least one contact surface (17) and
- With a second plug contact (50) which forms at least one mating contact surface (54), wherein
- the plug-in contacts enter into a plug-in connection (10) together through a contact surface (17) and mating contact surface (54), characterized in that
- Both plug contacts (11, 50) engage in one another in a relatively movable manner even when electrical voltage is applied, so that the contact surfaces (17, 54) of the plug contacts (11, 50) slide on one another
- the contact surface (17) of the first plug contact (11) is formed by a contact bump (15) arranged on the first plug contact (11),
- The counter-contact surface (54) of the second plug-in contact (50) is formed by a contact lens (53) arranged on the second plug-in contact (50), wherein
- the contact bump (15, 19) is in contact with the contact lens.

Description

The invention relates to a plug connector for an electrical connection, in particular for a direct current connection, with a first plug contact, which forms at least one contact surface, and with a second plug contact, which forms at least one mating contact surface, the plug contacts forming a plug connection through a contact surface and mating contact surface being supported together enter.

The plug-in connectors of the generic type are known from the state of the art, which cannot be documented in printed form, and in a wide variety of forms.

Such plug connectors are used to connect two electrical components to one another and to electrically couple them to one another. So it is known to couple two cable harnesses to each other via connectors. Connection cables are also fixed to circuit boards via plug connectors. Incidentally, there are plug-in connections in lighting technology in order to establish an electrical connection between the lamp base and the lamp holder.

Connections in AC networks as well as in DC networks can be established with plug-in connectors of the generic type. In principle, high demands are placed on the coating of the contact surfaces of the plug contacts of plug connectors that rest against one another in order to keep the contact resistance as low as possible. The higher the electrical conductivity of the contact surfaces, the lower the contact resistance, so that higher currents can be transmitted or correspondingly smaller plug contacts can be used, depending on the requirements.

In this respect, it is known from the prior art to give the contact surfaces a high-quality finish.

In order to ensure the surface quality, relative movements of the plug contacts of the plug connection are generally to be prevented, since otherwise the surface will be damaged by fretting corrosion. This is particularly important when using direct current, since such connections can cause arcing faults that cause strong oxidation reactions, so that the surfaces burn up in places. This significantly reduces the electrical conductivity in these areas, in turn increases the contact resistance and also promotes the development of arcing faults and increased corrosion.

However, there are areas of application in which the relative movements of the plug contacts of plug connectors can only be kept within sufficient limits with great effort or due to the nature of the system. Here, on the one hand, automotive technology can be mentioned as an example, in which the vehicle vibrations introduce high impulse forces into the plug connections, which are difficult and expensive to absorb.

In the field of lighting technology, there are so-called push-in/pushout connections, in which the electrical plug-in connection is accompanied by mechanical fixing. Here, by inserting the connectors into one another via a spring-loaded control mechanism, the spring-loaded locking mechanism is released and the inserted part is ejected.

Such push-in/push-out solutions are used, for example, in LED technology together with base and socket designs. This is described, for example, in EP 2 896 880 A1 the applicant.

Depending on the system, especially with double-ended lamps, material tolerances and the expansion behavior of the materials under the influence of temperature often lead to movement conditions in the plug connection that are difficult to control.

The object of the invention is therefore to create a plug connector for an electrical connection between two components, which permanently ensures sufficiently good electrical conductivity of the plug connection even when there is a relative movement of the plug contacts. The primary aim is to create a plug-in connection for a push-in/push-out connection, in particular for a base socket system.

It is known from the non-generic prior art, which is also not documented in printed form, to provide the switching contacts in electrical switches with contact cams which are made of a special metal alloy, in particular a silver-nickel alloy. These are used to enable the so-called bouncing process, a wear of the contact inherent in the bouncing process, and to ensure a sufficiently long service life of the switch when the switching contact and counter-contact meet. These contact cams are either welded onto the switch contact or riveted there.

The invention is solved by a connector with the features of claim 1, in particular with its characterizing feature len, according to which both plug contacts mesh relatively movably even when electrical voltage is applied, so that the contact surfaces of the plug contacts slide on one another, the contact surface of the first plug contact is formed by a contact bump arranged on the first plug contact, the mating contact surface of the second plug contact is formed by a contact lens arranged on the second plug contact is formed, wherein the contact bump rests against the contact lens.

The plug connector according to the invention solves the object of the invention by a new approach that is diametrically opposed to the previous teaching from the prior art. Instead of looking for solutions that are suitable for reliably avoiding the relative movement of the connectors or the plug contacts to one another, the invention allows the relative movement. By applying a material layer in the form of a contact bump and contact lens on the first and second plug contact, the invention creates elements that are comparable to a contact coating, which reduces the contact resistance between the two plug contacts and greatly improves the electrical conductivity.

In addition, the material layer creates a wear layer that allows corrosion processes to occur over the service life of the plug connection.

The terms "contact lens" and "contact wart" are primarily to be regarded as an application of material on the first or second connector with a minimum thickness of at least 0.5 millimeters. The terms "contact lens" and "contact wart" are only secondarily to be understood as material application of a spherical shape on the respective plug contact.

A preferred embodiment is characterized in that the contact bump and the contact lens from one of the respective

Plug contact made different material and are particularly positively defined on the respective plug contact.

As already mentioned above, the choice of material for the contact bump and contact lens can be used to reduce the contact resistance in the sense of a compensation in the mutual contact area of the plug contacts and thus to significantly improve the conductivity of the plug connection.

Theoretically, however, it is also conceivable for the contact bump and the contact lens to be made of the same material as the plug contacts.

In a specific embodiment, the plug connector is characterized in that the first plug contact is designed as a plug with at least one plug arm and the second plug contact is designed as a socket with two contact arms forming a plug gap between them, and the at least one plug arm for establishing the electrical connection in the Plug-in gap is arranged between the contact arms, and the plug-in arm has two diametrically opposite bumps, each facing a contact arm of the socket.

The design of the connector with a socket contact, which accommodates a plug-in arm, increases the contact area, and doubles it in the case of a design mirrored along the plug-in arm. This results in a correspondingly reduced wear with the same load.

Provision is made for the plug-in arm to have an opening which has two opposite inlet openings and in which the contact bumps are held.

This embodiment enables the contact bumps to be mechanically anchored in the plug-in arm, which has considerable advantages in terms of production technology in the case of diametrically opposite contact bumps.

In fact, it is provided that the contact nubs are opposite ends of a contact member, which is arranged with its neck connecting the contact nubs in the opening.

In this embodiment, the contact bumps are designed as the ends of one and the same contact element, so that two diametrically opposite contact bumps can be fixed on the plug-in arm in a particularly simple manner.

Provision is also made for the diameter of the inlet openings of the opening to be larger than a passage section of the opening that passes through the radial center plane of the opening.

The configuration of the opening with a narrowed passage section leads to an undercut in the contact element, in particular in the neck of the contact element. Even if a contact nub is completely worn out, the contact element is reliably prevented from becoming detached from the opening.

Then it is provided that each inlet opening is surrounded by a wall which is parallel is aligned with the central axis of the opening, with a bottom section projecting in the direction of a central axis of the opening adjoining the wall.

It is then provided in particular that each contact bump is seated on the bottom section facing it and the neck of the contact member is seated in the passage section of the opening.

In this way, the contact bump is sunk to a certain extent in the plug-in arm, so that, especially with a spherical contact bump surface, the weaker edge areas of the contact bump, in particular its peripheral edge, are protected from excessive wear, especially when the plug connection is made. This applies both to purely mechanical wear and tear when the plug connection is made without current, but to a much greater extent when the plug connection is made when it is energized.

1. a) der Steckarm des Steckverbinders mit einer Durchbrechung versehen wird,
2. b) ein Metallstück, insbesondere ein Metallstift in die Durchbrechung eingesetzt wird,
3. c) das Metallstück mittels einer den Steckarm zwischen sich aufnehmenden Umformeinrichtung zu zwei sich diametral gegenüberliegenden Kontaktwarzen des Steckarmes umgeformt wird.

Finally, a method for producing a connector with the features of claim 1 and possibly with the subclaims referring back to claim 1 is disclosed with the characterizing method steps, according to which

1. a) the plug-in arm of the connector is provided with an opening,
2. b) a piece of metal, in particular a metal pin, is inserted into the opening,
3. c) the piece of metal is formed into two diametrically opposite contact nubs of the plug-in arm by means of a forming device which accommodates the plug-in arm between itself.

By means of the method, the contact nubs that are diametrically opposite one another in the plug-in arm can be manufactured in a particularly advantageous manner.

Further advantages of the invention and a better understanding of the same result from the following description of an exemplary embodiment.

• 1 einen ersten Steckkontakt des erfindungsgemäßen Steckverbinders in perspektivischer Ansicht von oben,
• 2 der erste Steckkontakt gemäß 1 in perspektivischer Ansicht von unten,
• 3 der erste Steckkontakt gemäß 1 in Seitenansicht,
• 4 der erste Steckkontakt gemäß 1 in Ansicht von oben,
• 5 eine Schnittdarstellung des ersten Steckkontaktes gemäß Schnittlinie V - V in 4,
• 6 der zweite Steckkontakt der erfindungsgemäßen Steckverbindung in Seitenansicht,
• 7 der zweite Steckkontakt gemäß 6 in Ansicht von oben,
• 8 der erste Steckkontakt gemäß 1 ohne Kontaktglied in Perspektive,
• 9 der erste Steckkontakt ohne Kontaktglied in Ansicht von oben,
• 10 der erste Steckkontakt in Schnittansicht gemäß Schnittlinien X - X in 9,
• 11 eine Ausschnittsvergrößerung des ersten Steckkontaktes gemäß Ausschnittskreis XI in 10,
• 12 Darstellung einer Steckverbindung zwischen dem ersten und dem zweiten Steckkontakt des erfindungsgemäßen Steckverbinders,
• 13 und 14 eine schematische Darstellung der Fertigung des Kontaktgliedes des ersten Steckkontaktes.

Show it:

• 1 a first plug contact of the connector according to the invention in a perspective view from above,
• 2 the first plug contact according to 1 in a perspective view from below,
• 3 the first plug contact according to 1 in side view,
• 4 the first plug contact according to 1 in top view,
• 5 a sectional view of the first plug contact according to section line V - V in 4 ,
• 6 the second plug contact of the plug connection according to the invention in a side view,
• 7 the second plug contact according to 6 in top view,
• 8th the first plug contact according to 1 without contact link in perspective,
• 9 the first plug-in contact without a contact element viewed from above,
• 10 the first plug contact in sectional view according to section lines X - X in 9 ,
• 11 a detail enlargement of the first plug contact according to detail circle XI in 10 ,
• 12 Representation of a plug connection between the first and the second plug contact of the plug connector according to the invention,
• 13 and 14 a schematic representation of the production of the contact member of the first plug contact.

A plug-in connection of two plug-in contacts (11, 50) is denoted overall by the reference number 10 in the figures.

For the connector 10, a first plug contact 11 is required first.

1 shows the specific embodiment of the first plug contact 11 in a perspective view from above. The plug contact 11 has a plug arm 12 which originates from a clamping section 13 .

The clamping section 13 is used with its retaining tongue 14 to anchor the first plug contact in a contact carrier, not shown.

The plug-in arm 12 has a contact boss 15 on its upper side 16, which behaves like a material reinforcement compared to the top 16 of the plug-in arm 12, that is to say it extends well beyond the upper side 16.

In a specific embodiment, it is provided that the contact nub 15 corresponds to an application of material with a thickness of at least 0.5 millimeters relative to the upper side 16 of the plug-in arm 12 .

In fact, the thickness of the material deposit depends on a number of variables, such as the expected wear, the hardness of the material of the bump 15 and the planned one Service life of the plug-in connection 10. As a rule, therefore, a material application of between 1 millimeter and 4 millimeters is assumed.

The contact boss 15 serves as a contact surface 17 for the first plug contact 11, by means of which the electrical connection to a counterpart is established by mutual contact.

2 shows the first plug contact 11 in a perspective view from below. This view shows that the underside of the plug-in arm 12 is provided with a second contact boss 19 which also serves as a contact surface 17 . An electrical connection between the first plug contact 11 and a counterpart can also be established via the contact surface 17 of the second contact boss 19 . It is important to point out that in principle one of the contact bumps 15, 19 is sufficient for the principle of the invention to be described below, but in the exemplary embodiment specifically described here the use of two contact bumps 15, 19 has specific advantages.

In 3 the first plug contact 11 is shown again in a side view. It can be seen from this that the first contact bump 15 and the second contact bump 19 are arranged diametrically opposite one another on the plug-in arm 12 and correspond in principle to one another in terms of shape and size.

5 shows a sectional view of the first plug contact 11 along the dashed line V - V of 4 .

5 It can be seen that the first bump 15 and the second bump 19 are opposite ends of a contact member 20 and are connected to each other by a neck 21 of the contact member 20 . The contact member 20 itself sits in an opening 22 of the plug-in arm 12 and is held there in particular mechanically and thus in a form-fitting manner.

the 6 and 7 show the second plug contact 50 for the connector 10, which initially on 6 , the side view of the second plug contact 50 should be discussed.

The plug contact 50 has two opposite contact arms 51 which form a plug gap 52 between them. Each contact arm 51 has a contact lens 53 which, as it were, is formed as the contact bumps 15, 19 of the first plug contact 11 as an application of material on the respective contact arm 51. In this case, each contact lens forms a counter-contact surface 54 which is able to enter into an electrical connection with the respective contact surface 17 of the contact bump 15, 19.

In order to realize the fundamental advantages of the invention, it is sufficient if the second plug contact 50 is only equipped with one contact arm 51, so that an embodiment not shown in detail is conceivable in which a one-sided, first contact bump 15 of the first plug contact 11 is attached to a contact lens 53 a second plug contact 50 with only one contact arm 51 is present.

Nevertheless, the socket formed by the second plug contact 50 with two mutually pointing contact lenses 53 in the plug gap 52 has specific advantages, which will be discussed below.

Like in particular 7 in synopsis with 6 can be seen are at the in the 6 and 7 In the illustrated embodiments of the second plug contact 50, the contact lenses 53 are arranged on the contact arms 51 in a cohesive and non-positive manner. This can be done, for example, by welding. However, it is also conceivable for the contact lenses 53 to be in the form of a rivet and to be fixed in the respective contact arm 51 in a form-fitting manner.

Based on 8th until 11 . What all representations have in common is that the contact element 20 has been omitted in order to be able to make the opening 22 visible. The opening 22 has two inlet openings 23 which are arranged on the upper side 16 and the lower side 18 of the plug-in arm 12 .

The inlet openings 23 are thus located opposite one another and are arranged in alignment with one another. The inlet openings 23 have a larger diameter than a passage section 24 of the opening 22 connecting the two inlet openings 23.

From the 10 and in particular that according to detail circle XI in 10 enlarged view in 11 it can be seen that each inlet opening 23 is surrounded by a wall 25 which is aligned parallel to the central axis M of the opening 22 and which thus extends at right angles to the upper side 16 or lower side 18 in the exemplary embodiment. A bottom section protruding in the direction of the central axis M of the opening 22 adjoins this wall 25 26 at that in the 8th until 11 parallel to a radial plane R of the opening 22, so that a disk-like depression 27 is introduced into the plug-in arms 12 in the upper side 16 and the lower side 18.

In the 8th until 11 it can be seen that the bottom section 26 drops down like a funnel to the passage section 24 .

11a now shows a detailed view similar to 11 , but with the contact member 20 seated in the opening 22. It can be seen from this illustration that the contact bumps 15, 19 are seated in the disk-like depression 27 of the plug-in arm 12 and as a result their peripheral edges, i.e. the areas with the smallest material thickness, are arranged in a protected manner in the depression 27 .

12 now shows the plug-in connection 10 produced between the first plug-in contact 11 and the second plug-in contact 50. Here the plug-in arm 12 sits in the plug-in gap 52 between the contact arms 51, with the respective contact lenses 53 of the contact arms 51 resting on the contact bosses 15, 19.

The plug-in connection 10 according to the invention is provided for plug-in contacts 11, 50 which are movable relative to one another and which slide off one another with their contact surfaces 17 and mating contact surfaces 54 during the operation of connected electrical devices, ie when electricity is present. Since, as already described at the outset, this can lead to fretting corrosion and corrosion due to arcing, in particular when direct current is applied, the contact bosses 15, 19 and the contact lenses 53 are designed as wearing elements. In contrast to conventional surface finishes, a certain amount of wear is consequently taken into account in the design of the plug-in connection 10, after which the strength of the contact bumps 15, 19 and also the contact lenses 53 in particular is initially measured.

The invention also makes it possible for the contact bumps 15, 19 and also the contact lenses 53 to be made of non-uniform material with the plug-in arm 12 or the contact arms 51. It is thus possible to select a material that is suitable for the formation of the contact lenses 53 and the contact bumps 15, 19 in terms of electrical conductivity, low contact resistance and optimized wear.

For example, different silver alloys, for example silver-nickel alloys, are suitable for forming the contact bumps 15, 19 and the contact lenses 53. The choice of material and the material hardness can also be used to define which of the two plug contacts 11, 50 is primarily to be worn.

The formation of the opening 22 in the plug-in arm 12 for holding the contact member 20 with its bumps 15, 19 also has various advantages. 5 shows a first variant with which the first basic principle can be easily explained. The passage section 24, which is reduced in diameter compared to the inlet openings 23, means that the contact neck 21 continues to form an undercut and is held in the opening 22, even when the respective contact boss 15, 19 is completely worn down to the level of the top side 16 or bottom side 18. the contact member 20 can therefore not slip out of the plug-in arm 12.

This ensures that complete wear of the respective contact boss 15, 19 is actually possible. One can also imagine that a form-fitting fixing of the contact member 20 in the opening 22 is also possible with a contact bump 15, 19 provided only on one side.

The in the 8th until 11 shown special embodiment of the opening 22 shows its advantages when looking at the 11 a . Irrespective of the actual design of the contact bumps 15, 19, the edges are particularly susceptible to corrosion, since the mechanical stress is greatest here when the plug-in connection is made and arcing is most likely to occur when voltage is applied.

If the contact bosses 15, 19 and the contact lenses 53 are also provided with a spherical surface, the edge areas naturally have the smallest material thickness. This makes them more vulnerable to premature wear.

The disk-like indentation 27 in the plug-in arm 12 created by the wall 25 and bottom section 26 allows the contact bosses 15, 19 and, if necessary, the contact arms 51 to be designed in a similar way, also the contact lenses 53 to be countersunk in the plug-in arm 12 or the contact arms 51 and the sensitive edge areas, in particular to protect against premature wear in the case of spherically formed contact bumps 15, 19 and contact lenses 53.

Based on 13 and 14 a method for introducing the contact bumps 15, 19 or the contact member 20 into the plug-in arm 12 of the first plug-in contact 11 will now be described.

First, a suitable opening 22 is made in the plug-in arm 12 . In a preferred embodiment, it is a to 5 or 11 described opening, in which the inlet openings 23 are formed larger in diameter than a central passage section 24.

As 13 shows, the plug-in arm 12 is arranged between two rams 70 . The respective matrix surface 71 associated with the plug-in arm 12 has a cavity 72 that defines the surface shape of the contact boss 15, 19. A piece of metal, in particular a metal pin 73 , is positioned in the opening 22 of the plug-in arm 12 . The metal pin 73 consists of an alloy which is suitable for the purposes of the invention of the bumps 15, 19.

If the press dies 70 are then moved towards one another in the closing direction S, the metal pin 73 moves to the 14 shown contact member 20 is formed, which forms the contact bump 15 or 19 at its ends and whose neck 21 is seated in the passage portion 24 of the opening 22 .

The closed rams are in this case accordingly 14 on the plug-in arm 12 on the underside and on the top. The metal can easily flow around the plug-in arm material during the forming process due to the funnel-like transition surfaces between the base section 26 and the passage section 24 . As a result, the contact member 20 is seated in the plug-in arm 12 in a form-fitting manner and essentially free of cavities.

In a preferred embodiment, the diameter of the metal pin 73 is dimensioned such that it sits in the opening 22 with a friction fit. In this way, the metal pin 73 can be pre-fixed in the plug-in arm 12 before the latter is arranged between the rams.

It is now easy for a person skilled in the art to also manufacture a plug-in contact 11 with plug-in arms 12 in an analogous manner, which is only provided with a contact nub 15 or 19 on one side. In this case, it is only necessary to form one of the press stamps 70 without a cavity, ie with a surface that is plane-parallel to the upper side 16 or lower side 18, and then to deform the metal pin 73 in a corresponding manner.

The method described above can also be used if the opening 22 has inlet openings 23 with the same diameter as the opening section 24 . In this case, the edge areas of the contact bumps 15, 19 would be similar to those shown in 5 rest on the top 16 or bottom 18 of the plug-in arm 12. With such an embodiment of the opening 22, however, one would have to accept the disadvantage that the contact element 20 is not secured against loss due to the undercut formed by the neck 21.

With the help of the prescribed method, a number of production-related problems are avoided if, in particular, diametrically opposite contact bosses 15, 19 are to be fixed to the contact arm 12 by means of welding or riveting processes.

Overall, the invention discloses an advantageous plug-in connection 10 which allows the plug-in contacts 11 and 50 to be connected relative to one another even when electricity is present, in particular when direct current is present. For this purpose, the invention consciously accepts the wear and tear of the contact surfaces 17 and mating contact surfaces 54 and reinforces it by providing contact bosses 15, 19 or contact lenses 53 on the plug-in arm 12 or the contact arms 51 in the sense of a clear application of material.

These allow sufficient wear over the service life of the plug connection, which ensures optimal electrical conductivity between the contacts.

The additionally presented manufacturing method for two diametrically opposed contact bosses 15, 19 avoids the manufacturing problems to be expected with welding or riveting processes and also allows the surface contour of the contact bosses 15, 19 or contact lenses 53 to be designed freely.

Reference List

10

connector

11

first plug contact

12

plug-in arm

13

clamping section

14

retaining tab

15

first contact wart

16

top

17

contact surface

18

bottom

19

second contact wart

20

contact link

21

throat

22

breakthrough

23

intake port

24

passage section

25

Wall

26

bottom section

27

disk-like depression

S

closing direction

M

central axis

R

radial plane

50

second plug contact

51

contact arm

52

slot

53

contact lens

54

mating contact surface

70

press stamp

71

matrix surface

72

cavity

73

metal pin

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2896880 A1 [0009]

Claims (8)

Plug connector (10) for an electrical connection, in particular for a DC connection, - with a first plug-in contact (11) which forms at least one contact surface (17) and - with a second plug-in contact (50) which forms at least one counter-contact surface (54), - the plug-in contacts forming a plug-in connection (10) through a contact surface (17) and counter-contact surface (54) being supported, characterized in that - both plug-in contacts (11, 50) engage in one another in a relatively movable manner even when electrical voltage is applied, so that the contact surfaces ( 17, 54) of the plug contacts (11, 50) slide on one another - the contact surface (17) of the first plug contact (11) is formed by a contact bump (15) arranged on the first plug contact (11), - the mating contact surface (54) of the second Plug contact (50) of a on the second plug contact (50) arranged contact lens (53) is formed, wherein - the contact bump (15, 19) on the contact lens lies. Connector (10) according to claim 1 , characterized in that the contact bump (15, 19) and the contact lens (53) are made of a different material from the respective plug contact (11, 50) and are fixed in particular in a form-fitting manner on the respective plug contact (11, 50). Connector (10) according to claim 1 or 2 , characterized in that - the first plug contact (11) is designed as a plug with at least one plug arm (12) and - the second plug contact (50) is designed as a socket with two contact arms (51) forming a plug gap (52) between them, and - the at least one plug-in arm (12) is arranged in the plug-in gap (52) between the contact arms (51) to produce the electrical connection, and - the plug-in arm (12) has two diametrically opposed contact bumps (15, 19) lying opposite one another, each facing a contact arm (51) of the socket. Connector (10) according to claim 3 , characterized in that the plug-in arm (12) has an opening (22) which has two opposite inlet openings (23) and in which the contact bumps (15, 19) are held. Connector (10) according to claim 4 , characterized in that the contact bosses (15, 19) are mutually opposite ends of a contact member (20) which is arranged with its neck (21) connecting the contact bosses (15, 19) in the opening (22). Connector (10) according to claim 4 , characterized in that the diameter of the inlet openings (23) of the opening (22) is larger than a passage section (24) of the opening (22) passing through the radial center plane of the opening (22). Connector (10) according to claim 6 , characterized in that - each inlet opening (23) is surrounded by a wall (25) which is aligned parallel to the central axis (M) of the opening (22), wherein - the wall (25) extends in the direction of a central axis ( M) the opening (22) adjoins the protruding base section (26). Connector (10) according to claims 5 until 7 , characterized in that each contact bump (15, 19) is seated on the bottom section (26) facing it and the neck (21) of the contact member (20) is seated in the passage section (24) of the opening (22).

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