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Title:
ELECTRICAL CONTACT FOR A PLUG CONNECTOR, HAVING ROTATABLE ROLLING CONTACT BODIES, AND ELECTRICAL PLUG-IN CONNECTION WITH SUCH A CONTACT
Document Type and Number:
WIPO Patent Application WO/2018/050834
Kind Code:
A1
Abstract:
Electrical contact for a plug connector, having rotatable rolling contact bodies,and electrical plug-in connection with such a contact The invention relates to an electrical contact (1) for a plug connector (5) which can be plugged in a plug-in direction (6). The contact (1) is provided with a contact surface (12) for contacting a complementary contact (8). The invention also relates to a plug-in connection (2) which has the two contacts (1, 8) which can be mated. In order to create contact with a stable contact resistance between the contacts (1, 8) and at the same time to be able to mate the contacts (1,8) without large contact forces, it is envisaged according to the invention that the contact surface (12) of a contact (1) has rotatable rolling contact bodies (20) made of an electrically conductive material. The rolling contact bodies (20) are located between the mated contacts (1,8) of the plug-in connection (2) and produce the electrical contact between the two mated contacts. By means of the rotatability of the rolling contact bodies (20) a rolling movement is possible upon insertion and in the mated state, such that compensating movements can take place in a vibration-loaded environment in the plug-in connection, which compensating movements prevent a cable break of the cables(34) which are linked to the contacts (1, 8).

More Like This:
WO/1993/001633PLUG CONTACT
WO/2021/091577ELECTRICAL CONNECTOR
Inventors:
BECK KARL (DE)
Application Number:
PCT/EP2017/073303
Publication Date:
March 22, 2018
Filing Date:
September 15, 2017
Export Citation:
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Assignee:
TE CONNECTIVITY GERMANY GMBH (DE)
International Classes:
H01R24/58; H01R24/38; H01R39/64
Foreign References:
DE4138813A11993-05-27
Other References:
None
Attorney, Agent or Firm:
MURGITROYD & COMPANY (GB)
Download PDF:
Claims:
Claims

An electrical contact (1 ) for a plug connector (3) which can be plugged in a plug-in direction (6) having a contact surface (12) for contacting a complementary contact (8), characterised in that the contact surface (12) has rotatable rolling contact bodies (20) made of an electrically conductive material.

The electrical contact (1 ) according to Claim 1 , characterised in that the electrical contact (1 ) has a rolling body cage (24) with openings (26) into which the rolling contact bodies (20) are inserted.

The electrical contact (1 ) according to Claim 2, characterised in that the rolling body cage (24) is held at a carrier (51 ) made of electrically conductive material and in that the carrier (51 ) contacts the rolling contact bodies (20).

The electrical contact (1 ) according to Claim 3, characterised in that the rolling contact bodies (20) are held rollingly at the carrier (51 ) by the rolling body cage (24).

The electrical contact (1 ) according to Claim 3 or 4, characterised in that the rolling body cage (24) is movable relative to the carrier (51 ).

The electrical contact (1 ) according to any one of Claims 2 to 5, characterised in that the rolling body cage (24) is provided with weakened areas (40) between individual rolling contact bodies (20) and/or groups (70) of rolling contact bodies (20), in which weakened areas (40) the rolling body cage (24) is more compliant than around the weakened areas (40).

The electrical contact (1 ) according to any one of Claims 2 to 6, characterised in that the rolling body cage (24) has a gap (38) extending in the plug-in direction (6).

The electrical contact (1 ) according to any one of Claims 2 to 7, characterised in that the rolling body cage (24) is surrounded outwardly by a sleeve-shaped housing (50).

The electrical contact (1 ) according to Claim 8, characterised in that the sleeve-shaped housing (50) is a preloaded spring sleeve (36) which impacts on the rolling body cage (24) for generating a contact force (68) which acts on the rolling contact bodies (20).

10. The electrical contact (1 ) according to any one of Claims 3 to 9, characterised in that spacers (52) are located between the carrier (51 ) and the rolling body cage (24) and in that the rolling contact bodies (20) are spaced apart from the sleeve-shaped housing (50).

1 1 . The electrical contact (1 ) according to any one of Claims 2 to 10, characterised in that the rolling body cage (24) forms a spring sleeve (36) for receiving a pin contact (10).

12. An electrical plug-in connection (2) with two contacts (1 , 8) which can be mated in a plug- in direction (6), characterised in that a contact surface (12) of one of the contacts (1 , 8) has rotatable rolling contact bodies (20) which produce the electrical contact between the two mated contacts (1 , 8). 13. The electrical plug-in connection (2) according to Claim 12, characterised in that one of the two contacts (1 , 8) is configured according to any one of Claims 1 to 1 1 .

14. The electrical plug-in connection (2) according to Claim 12 or 13, characterised in that the contact (1 ) is movable in the mated state relative to the complementary contact (8) via the rolling contact bodies (20) which roll on the complementary contact (8). 15. The electrical plug-in connection (2) according to any one of Claims 12 to 14, characterised in that one contact (8) is rotatably held in the other contact (1 ) about the plug-in direction (6).

Description:
Electrical contact for a plug connector, having rotatable rolling contact bodies, and electrical plug-in connection with such a contact

The invention relates to an electrical contact for a plug connector which can be plugged in a plug-in direction, having a contact surface for contacting a complementary contact. In addition, the invention relates to an electrical plug-in connection having two contacts which can be mated in a plug-in direction.

Such contacts are known, for example in the form of mutually complementary bushing contacts and pin contacts, wherein the pins can be peg-shaped or tab-shaped. For such contacts, it is important that a stable contacting of the mutually complementary contacts takes place, in particular it is important that the contact resistance remains stable. This is achieved by high contact forces, i.e. high forces which press the mutually complementary contacts together at their contact surfaces. In order to break through highly resistive corrosion layers and impurity layers, on the one hand, the contact surface should be as small as possible so that the contact force achieves a high surface pressure. On the other hand, the contact surface must not be too small, as otherwise the contact resistance becomes too great when high currents flow, even with broken-through corrosion layers and impurity layers.

A further disadvantage of high contact forces is that, in particular in the case of large plugs, the two contacts can only be mated by exerting high plug-in forces. If the contacts are then inserted in a vibration-loaded environment, there is generally the risk of a cable break due to the relative movement between the cables and the mated contacts.

Between these poles, the problem of the invention is to create an electrical contact for a plug-in connection and an electrical plug-in connection which in the event of stable contact resistance can also be employed in vibration-loaded environments with high durability using low plug-in forces.

This problem is solved for the abovementioned electrical contact in that the contact surface has rotatable rolling contact bodies made of an electrically conductive material. According to the invention, this problem is solved for the abovementioned electrical plug-in connection in that a contact surface of one of the contacts has rotatable rolling contact bodies which produce the electrical contact between the two mated contacts.

According to the invention, the electrical contact is thus produced via the rotatable rolling contact bodies. In order to be able to perform a rolling movement, the rolling contact bodies only have a small contact surface which consequently is able to break through corrosion layers and impurity layers, even in the case of low contact forces. By virtue of the rotatability of the rolling contact bodies, it is possible for the mutually complementary contacts to be mated with only low plug-in forces since the friction between the complementary contacts is low due to the rolling movement. Furthermore, the rotatability of the rolling contact bodies permits compensating movements during vibrations which reduces the risk of a cable break. The rolling contact bodies form a rolling bearing which at high contact pressure enables a smooth movement between the contacts.

The invention can be further improved by means of a range of further configurations, which are individually advantageous and can be combined with one another as desired.

In order to minimise the plug-in forces, the contact surface thus preferably consists exclusively of rolling contact bodies or the peripheral surface thereof. The contact resistance can be reduced if, according to a further configuration, the rolling contact bodies consist of an electrically conductive material with a conductivity of at least 30 S/m. In particular, the rolling contact bodies can contain at least one of the following metals: gold, silver, aluminium or copper. The rolling contact bodies are in particular spheres, cones, truncated cones, barrels, needles and/or cylinders.

In a further advantageous configuration, it is envisaged that the electrical contact has, in particular as a separate component, a rolling body cage with openings in which the rolling contact bodies are inserted. In particular if the rolling body cage is configured as a separate component, a pre-assembly of the rolling body cage and rolling contact bodies can be carried out cost effectively, separately from a final assembly of the contacts.

The rolling body cage can be manufactured from electrically non-conductive or electrically insulating material, such as plastics. With the help of plastics, a low-friction mounting of the rolling contact bodies can be achieved in a cost effective manner. If a rolling body cage made of an electrically non-conductive material is used, the current can be tapped from the rolling contact bodies from the contact surface at the side of the rolling body cage which is opposite the contact surface, for example by a sleeve or a pin made of conductive material (see above) which touches the rolling contact bodies on this side of the rolling body cage.

In another configuration, the rolling body cage can be manufactured from a conductive substance, for example a substance such as is specified above for the rolling contact bodies. In this case, the current can be transmitted by the rolling body cage. The rolling contact bodies project preferably at least on one side, namely the contact surface, beyond the rolling body cage. According to a further configuration, they can also project on both sides beyond the rolling body cage. The latter configuration is particularly useful if the rolling body cage is manufactured from a non-conductive material and/or the rolling body cage is movably held at the contact, such as is the case with a rolling bearing. The rolling body cage can thus be held at a carrier made of electrically conductive material, wherein the rolling contact bodies contact the carrier. The carrier serves to transmit the current which is received by the rolling contact bodies from the contact surface. The carrier itself can be sleeve-shaped or pin- shaped, depending on whether the electrical contact to the rolling contact bodies is a male or a female contact. The diameter and/or the geometry of the carrier and/or the rolling body cage is based on the respective standard of the plug-in connection. In many applications, the diameter of the carrier and/or rolling body cage is preferably smaller than the longitudinal extension in the plug-in direction, in order to meet the standard.

The inner or outer cross-section of the carrier and/or the rolling body cage can be round, circular and/or polygonal.

In order to enable relative movements between the mated plug connectors, the rolling contact bodies can be rollingly held, in particular about the plug-in direction, at the carrier by the rolling body cage. In a further configuration, the rolling body cage is movable relative to the carrier. In this case, the rolling body cage can be slidable, in particular along the plug-in direction, in a translatory manner relative to the carrier and/or rotatable about a common longitudinal axis relative to the carrier, in particular about the plug-in direction. On the one hand, the mobility of the rolling body cage with the rolling contact bodies held therein enables compensating movements if the cables which are attached to the electrical contact move. On the other hand, in particular the mobility of the rolling body cage along the plug-in direction reduces the mating and releasing of the electrical contacts. For all the mobility of the rolling bearing cage, it is preferably fitted at the carrier in a captive manner via a positive connection such as a locking connection, for example.

According to a further configuration, the rolling bearing cage and/or the carrier can be connected to a crimping section for crimping a conductor in a cohesive, and in particular a monolithic manner. In this case, the electrical contact is configured as a crimp contact. With the help of the rolling contact bodies, an electrical connection which holds secure contact, is easy to plug and compensates for cable movements is thus possible for these types of contacts, to which a conductor is directly fitted, while the overall size is small with contact diameters of less than 5 mm.

According to a further configuration, the rolling body cage can be configured in two parts and can have an inner part and an outer part between which the rolling contact bodies are held. One of the two parts can be manufactured from a non-conductive substance, whereas the other part consists of a conductive substance and thus transmits the current received by the rolling contact bodies. If the current is to be transmitted via the rolling contact bodies, then both parts can naturally be manufactured from a non-conductive substance, such as plastics.

In order to increase the mobility of the rolling body cage so that, on the one hand, it is deformable when generating a contact force and, on the other hand, it can compensate for shape tolerances, it is envisaged that the rolling body cage is provided with weakened areas between individual rolling bodies and/or groups of rolling bodies, in which weakened areas the compliance of the rolling body cage is increased in relation to the environment of the weakened areas. In the area of the rolling contact bodies, there is thus a higher rigidity such that the rolling contact bodies are held securely and are also still easily rotatable in the event of a deformation of the rolling body cage, because the deformation focuses on the weakened areas due to the increased compliance. The weakened areas can have in particular an opening in the material, in particular also a plurality of consecutive openings in the material in the plug-in direction.

In order to be able to be stretched or compressed in the radial direction or transversely to the plug-in direction and thus exert or transmit a contact force, the rolling body cage can have a gap which extends in the plug-in direction. The gap can extend continuously through the entire rolling body cage or can be divided by material bridges.

In particular if the electrical contact is sleeve-shaped, the rolling body cage can be outwardly surrounded by a sleeve. The sleeve can serve as a carrier or as an outer housing which protects the rolling contact bodies and the rolling body cage. If the sleeve is manufactured from an electrically conductive material, it can serve to transmit the current which is received by the rolling contact bodies. In such a case, the sleeve can be provided with an attachment section in a cohesive, in particular monolithic manner, for example a soldering or crimping section to which an electrical conductor can be attached. The rolling body cage can be axially secured in the sleeve either immovably or slidable between the two end positions. Furthermore, the rolling body cage can be rotatably held in the sleeve, in particular freely rotatably held about the plug- in direction. This is possible in particular with a configuration in which the contact sleeve has a circular inner cross-section and the pin contact has a circular outer cross-section which are coaxially aligned to one another. Each of these configurations, however in particular their combination, increases the mobility of the plugged plug-in connection and prevents a cable break.

The rolling contact bodies can roll on the carrier, for which the carrier forms a running surface for the rolling contact bodies which is located on the side of the rolling contact bodies which faces away from the contact surface.

In a further embodiment, the sleeve can be a preloaded spring sleeve, the spring force of which preferably acts on the rolling body cage transversely to the plug-in direction. Thus, in the case of a bushing-like contact, the contact force can be generated by means of the spring sleeve being stretched upon insertion of the corresponding complementary, in this case most often pin- shaped contact. Conversely, the sleeve can be compressed in the event of a pin-shaped contact and can generate the contact force by means of the resilient compression.

If a relative movement between the carrier of the rolling body cage and the rolling body cage is not desired, spacers can be located between the sleeve and rolling body cage and the rolling contact bodies can be spaced apart from the carrier. The spacers can be moulded on the carrier, for example the sleeve, and/or the rolling body cage, or can represent separate components.

In a further configuration, the rolling body cage can itself form a contact sleeve in which the pin contact is received. The rolling body cage can in this case be configured as a spring sleeve which is resiliency stretchable and/or compressible transversely to the plug-in direction, in particular radially to the plug-in direction. In the case of this configuration, the rolling body cage can be cohesively directly provided with an attachment section, such as, for example, a soldering or crimping area or a section for fitting the contact in a plug.

Hereinafter, the invention is depicted using exemplary embodiments with reference to the enclosed drawings. For the sake of simplicity, the same reference numbers are used in the individual exemplary embodiments for elements which correspond to one another in structure and/or function. Unless otherwise indicated in an exemplary embodiment, only the differences from the preceding exemplary embodiments will be explored. Moreover, in accordance with the preceding remarks, the features which are different in each individual exemplary embodiment can be combined with one another as desired. In addition, a feature of an exemplary embodiment can be omitted if its technical effect is unimportant in the case of a specific application. Conversely, an additional feature, such as is described above or in other exemplary embodiments, can be added to an exemplary embodiment if a specific application requires the technical effect linked to that feature.

In the drawings:

Fig. 1 shows a schematic perspective depiction of a contact according to the invention with a complementary contact for producing a plug-in connection;

Fig. 2 shows a schematic perspective depiction of a plug-in connection with the contacts of

Fig. 1 ;

Fig. 3 shows a schematic perspective depiction of a further exemplary embodiment of a contact according to the invention;

Fig. 4 shows a schematic perspective depiction of a rolling contact body in a rolling body cage;

Fig. 5 shows a schematic perspective depiction of a further contact according to the invention with a complementary contact;

Fig. 6 shows a schematic perspective depiction of a further exemplary embodiment of a contact according to the invention;

Fig. 7 shows a section along the line VII-VII of Fig. 6 in a schematic perspective depiction;

Fig. 8 shows a schematic perspective depiction of a rolling body cage;

Fig. 9 shows a schematic perspective depiction of a further exemplary embodiment of a contact according to the invention;

Fig. 10 shows a section along the line X-X of Fig. 9 in a schematic perspective depiction.

Firstly, structure and function are explained based on the electrical contact 1 and the electrical plug-in connection 2 relating to Figs. 1 and 2. The electrical contact 1 can be part of a plug connector 3.

Merely by way of example, the depicted electrical contact 1 is provided with a sleeve-shaped contact area 4, into which a complementary contact 8, here a peg-shaped pin contact 10 can be inserted in the plug-in direction 6. In another configuration, the pin contact 10 can also be configured tab-shaped, which requires a corresponding complementary configured sleeve- shaped contact area 5.

If the electrical contact 1 and the complementary contact 8 are mated in the plug-in direction 6, their contact surfaces 12 come into contact. In the case of the pin contact 10, the contact surface 12 is an outwardly facing outer surface 14, in the case of the sleeve-shaped contact 1 an inwardly facing inner surface 16. According to the invention, at least one of the contact surfaces 12, 14, 16 has rotatable rolling contact bodies 20 which are manufactured from an electrically conductive material, in particular an electrically conductive material with a conductivity of at least 30 S/m. The rolling contact bodies preferably contain at least one of the following metals: gold, silver, aluminium and/or copper.

In the plugged-in state, the contacts 1 and 8 are aligned coaxially to the plug-in direction 6.

In Figs. 1 and 2, the rolling contact bodies are spherical merely by way of example. Alternatively or additionally, conical, truncated cone-shaped, barrel-shaped, needle-shaped and/or cylindrical rolling contact bodies can be used. The rolling contact bodies have a diameter of between 0.5 mm and 2 mm.

Also merely by way of example, the contact surface 12 with the rolling contact bodies 20 is formed at the sleeve-shaped contact. It can also be formed at the pin contact 10.

The contact surface 12 of the contact 1 , 8 which has the rolling contact bodies 20 consists preferably exclusively of the surfaces 22 of the rolling contact bodies. For this purpose, the rolling contact bodies 22 protrude somewhat from each contact, in the case of the sleeve- shaped contact 1 inwardly, in the case of a (not depicted) pin-shaped contact 8 with rolling contact bodies 20 outwardly.

The rolling contact bodies 20 are rotatably held by a rolling body cage 24. For this purpose, the rolling body cage has openings 26 in which the rolling contact bodies 20 are inserted. This is schematically depicted in Fig. 4. A section of the rolling contact body 20 is positively held in the rolling body cage 24 and, in the case of the depicted spherical rolling contact body 20, rotatable in every direction, as is indicated by the arrows 28. A conical, truncated cone-shaped, barrel- shaped, needle-shaped and/or cylindrical rolling contact body would, however, only be rotatable about one individual rotation axis. As can be further seen in Fig. 4, the rolling contact body 20 projects at least on one side, but preferably on both sides, beyond the rolling body cage 24. In the case of the exemplary embodiment of Figs. 1 and 2, the rolling body cage 24 integrally forms an attachment section 30 to which, for example, a conductor 32 of a cable 34 can be attached. The attachment section 30 can be a crimping section and/or can have a section for a cohesive connection such as, for example, by means of soldering. The attachment section 30 can also serve to attach the electrical contact in a plug housing with further electrical contacts.

In the case of the exemplary embodiment of Figs. 1 and 2, the rolling body cage 24 is configured as a spring sleeve 36 which is resiliency stretchable or compressible in the direction transverse to the plug-in direction 6. For this purpose, the rolling body cage 24 can be provided with a gap 38 which in the plug-in direction 6 can pass through the entire rolling body cage 24 or can be divided by material bridges (not shown).

The rolling body cage 24 can have one or more weakened areas 40 in which the compliance is increased in relation to the environment of the weakened area. The weakened areas 40 can be arranged between individual rolling contact bodies 20 or between groups of rolling contact bodies 20. In particular, a weakened area 40 can have a recess 42. The sleeve-shaped rolling body cage 24 can adapt to shape tolerances by means of the weakened areas 40, wherein the deformation focuses on the weakened areas 40 such that the area around the rolling contact bodies 20 can be configured rigidly. The increased rigidity around the rolling contact bodies 20 prevents the rolling contact bodies 20 from being able to jam in the openings 26 in the event of deformation of the rolling body cage 24. In addition, the flexible configuration of the rolling body cage 24 permits an even distribution of the contact force onto the rolling contact bodies 20.

When the two contacts 1 , 8 are mated, the rolling contact bodies 20 of one contact 1 roll on the contact surface 12 of the other contact 10. The spring sleeve 36 and thus the rolling body cage 24 are resiliency deformed in the mated state, here stretched, such that a contact force is exerted on the rolling contact bodies 20. By virtue of the small contact surface, which is supplied by an individual rolling contact body 20, a high surface pressure arises which breaks through the corrosion layers or impurity layers and produces a secure electrical contact between the contacts 1 , 8. Despite a high contact pressure, the plug-in connection 2 can be plugged with only a small exertion of force since the rolling contact bodies do not slide on the other contact surface, but instead roll.

Securing the plug-in connection can be carried out by means of a locking connection 44 between the contacts 1 , 10, for example, which maintains mobility between the contacts 1 , 8. A rotatable but axially secured locking connection can, for example, be supplied by a groove 46, circumferential to the plug-in direction, in the complementary contact 8, in which one or more rolling contact bodies engage upon the two contacts 1 , 8 achieving a complete plugging.

When using spherical rolling contact bodies, the mated plug-in connection 2 permits a relative rotation 48 of the mated contacts 1 , 10 about the plug-in direction 6. This avoids cable 34 breaks, for example in vibration-loaded environments.

In Fig. 3, an embodiment of an electrical contact 1 is shown, in the case of which the rolling body cage 24 is configured integrally with an attachment section 30 for crimping a conductor 32 (not depicted). The electrical contact 1 can therefore be a crimp contact 47. In contrast to the embodiment of Figs. 1 and 2, the rolling body cage 24 has no weakened areas 40 but nevertheless acts as a spring sleeve 36.

The electrical contacts 1 or their rolling body cages 24 of the exemplary embodiments of Figs. 1 to 3 are manufactured from a stamped bent part and are preferably one piece. A multi-part electrical contact, in the case of which the rolling body cage 24 is received by a carrier 51 which is configured as a housing 50, is shown in Fig. 5. The electrical contact 1 with the rolling contact bodies 20 is here too only depicted as a contact sleeve by way of example. The rolling body cage 24 can also be attached to the pin contact 10, which is also depicted in Fig. 5, as a carrier.

The housing 50 surrounds the rolling body cage 24, outwardly sleeve-shaped, and can integrally form the attachment section 30 in one of the configurations described above. In Fig. 5, the rolling body cage 24 is produced from a non-conductive material such as, for example, plastics. The rolling body cage 24 can in particular be an injection moulding. Its configuration can in particular correspond to the configuration of the rolling body cage 24 according to one of the designs of Figs. 1 to 3.

Spacers 52 can be arranged between the carrier 51 and the rolling body cage 24. The spacers 52 can be formed on the carrier 51 and/or on the rolling body cage 24 or as separate parts. In Fig. 5, they are monolithic components of the rolling body cage 24. The rolling contact bodies 20 are held spaced apart from the carrier 51 by virtue of the spacers 52. The rolling contact bodies 20 can thereby rotate freely without rolling on the housing 50, in particular on its inner surface 54. The rolling body cage 24 can thereby remain stationary in the housing 50 upon insertion of the complementary contact 8 into the contact 1. The spacers 52 can be compressible transverse to the plug-in direction 6 such that upon insertion of the complementary contact 8 the rolling body cage 24 can resiliency stretch and exert a contact force onto the rolling contact bodies 20.

Alternatively or additionally, the rolling body cage 24 can bear against support points 56 on the carrier 51 , which are spaced apart from one another in a circumferential direction 56 about the plug-in direction 6, and can be spaced apart from the housing in the intermediate areas 58, wherein spacers 52 can be arranged in the areas 58. In this way, upon insertion of the complementary plug 8, the rolling body cage 24 can stretch until the spacers 52 abut against the carrier 51.

The rolling body cage 24 can be configured in multiple parts. This is explained with reference to Figs. 6 and 7 on the basis of a two-part rolling bearing cage 24 which has an inner part 60 and an outer part 62. The rolling contact bodies 20 are rotatably held between the inner part 60 and the outer part 62. In this case, the rolling contact bodies 20 only project beyond the rolling body cage 24 on the side of the contact surface 12.

Openings 26 can be present both in the inner part 60 as well as in the outer part 62, wherein the openings 26 are aligned for a rolling contact body 20, preferably in flush alignment with one another respectively. The section 64 of the rolling contact bodies 20 with the largest diameter is located between the inner part 60 and the outer part 62, which diameter is in each case larger than the inner width of the openings 26 in the inner part 60 and the outer part 62. The rolling contact bodies 20 are thus positively held between inner part 60 and outer part 62.

Similarly to the preceding exemplary embodiments, upon insertion of the complementary contact, the rolling body cage 24 is resiliency deformed, here stretched. This gives rise to a contact force 68 which impacts transversely to the plug-in direction 6 and which impacts on each rolling contact body 20.

The inner part 60 and/or the outer part 62 are manufactured from a conductive material. The current path 66 thus runs from one contact 8 via the rolling contact bodies 20 via the conductive inner part 60 and/or outer part 62 to the electrical conductor which is not depicted in Figs. 6 and 7. The inner part 60 is preferably made of plastics. Both parts 60, 62 can be equipped with a gap 38 as described above and/or have weakened areas 40, also in the configuration described above. The gaps 38 of the two parts 60, 62 can overlap. The rolling body cage 24 in Figs. 6 and 7 can be used instead of the rolling body cage of the preceding exemplary embodiments. In the preceding exemplary embodiments, a group 70 of rolling contact bodies, here a group 70 of 2 x 2 rolling contact bodies (cf. Fig. 6) arranged on a rectangular base, is respectively separated from the adjacent groups 70 in both the plug-in direction 6 and the direction about the plug-in direction 6.

Fig. 8 shows a configuration of a rolling body cage 24 in which the groups 70 of rolling contact bodies 20 form aligned rows 72 in the plug-in direction 6. The individual rows 72 are each separated by a weakened area 40 extending in plug-in direction 6 having a row 74 of recesses 42 which extend in plug-in direction 6.

In this configuration, the rows 72 form rigid segments which are movably connected to one another in the direction about the plug-in direction 6 via the weakened areas 40. This ensures that all rolling contact bodies can contact the complementary plug 8 (not depicted in Fig. 8).

In Figs. 9 and 10, an exemplary embodiment is shown in which the rolling body cage 24 is movably received in the contact 1. The mobility is achieved by the rolling contact bodies 20 contacting the carrier 51 and being able to roll on it. A movement of the rolling body cage 24 is possible about the plug-in direction 6 as a rotation axis and/or along the plug-in direction 6 in a translatory manner.

In the case of a rotational movement 48 of the complementary plug 8 about the plug-in direction 6, the rolling contact bodies 20 roll on the outer surface 14 of the complementary plug 8. Additionally, the rolling contact bodies 20 roll on the inner surface 16 of the carrier 51. The rolling movement of the rolling contact bodies 20 upon rotation 48 of the complementary contact 8 is indicated in Fig. 10 by means of the arrow 76. The rolling of the rolling contact bodies 20 on the outer surface 14 and the inner surface 16 leads to a rotation of the rolling body cage 24, which is depicted in Fig. 10 by means of the arrow 78 and the two directions of rotation (78, 48) are the same. In order to create sufficient contact forces 68 which guarantee a smooth rolling movement 76, a spring sleeve 36 is provided. In the configuration of Figs. 9 and 10, the spring sleeve 36 is a separate part which is assembled over the carrier 51.

If the rolling body cage 24 is held by the carrier 51 in a translatory manner along the plug-in direction 6, movable between two end positions, the rolling bearing cage 24 is thus, together with the complementary plug 8, moved in the same direction by virtue of the rolling movement of the rolling contact bodies 20 upon withdrawal of the complementary contact 8. Upon introduction of the complementary contact 8, the rolling body cage 24 moves in the same direction as the complementary contact 8. As a result, vibrational movements can also be compensated between the two end positions in the plug-in direction by means of a relative movement between the two contacts 1 , 8.

The rolling contact bodies 20 together with the rolling body cage 24 form a rolling bearing 80. The housing 50 or the carrier 51 can form the inner or outer running surface for the rolling contact bodies 20 on the contact surface 12 of the complementary contact 8.

List of reference numbers

Electrical contact

Electrical plug-in connection

Plug connector

Contact area

Plug-in direction

Complementary contact

Pin contact

Contact surface

Outer surface

Inner surface

Sleeve

Rolling contact body

Surface of the rolling contact bodies

Rolling body cage

Opening

Arrow

Attachment section

Conductor

Cable

Spring sleeve

Gap

Weakened area

Recess

Locking connection

Groove

Crimp contact

Rotation about the longitudinal axis

Housing

Carrier

Spacer

Inner surface of the housing

Support point

Area between support points Inner part

Outer part

Section with the largest diameter

Current path

Contact force

Group of rolling bodies

Row of rolling bodies

Row of recesses

Rolling movement of the rolling contact bodies

Rotation of the rolling body cage

Rolling bearing