Diagnosis plug-in connection, diagnosis head, and diagnosis system

1. A diagnosis plug-in connection comprising:

an electrical plug connector having a diagnosis assembly that has an outer conductor contact and an inner conductor contact, and the inner conductor contact is guided within the outer conductor contact;

an electrical mating plug connector having a diagnosis head with an electrically conductive spring cage, and the electrically conductive spring cage is designed for electrical and mechanical connection to the outer conductor contact of the diagnosis assembly of the electrical plug connector; and

the electrically conductive spring cage electrically and mechanically contacts the inner conductor contact of the diagnosis assembly of the electrical plug connector when the electrical plug connector is mated with the electrical mating plug connector.

2. The diagnosis plug-in connection as claimed in claim 1 and wherein the spring cage provides a low-resistance electrical connection between the outer conductor contact of the diagnosis assembly and the inner conductor contact of the diagnosis assembly when the electrical plug connector is mated with the electrical mating plug connector.

3. The diagnosis plug-in connection as claimed in claim 1 and wherein the inner conductor contact of the diagnosis assembly is guided coaxially within the outer conductor contact.

4. The diagnosis plug-in connection as claimed in claim 1 and wherein the electrically conductive spring cage is formed from a punched-and-bent part.

5. The diagnosis plug-in connection as claimed in claim 1 and wherein the electrically conductive spring cage has a plurality of spring tabs, and the plurality of spring tabs are arranged around a center axis (M) of the diagnosis head and each of the plurality of spring tabs has a front end and/or a rear end that is immovably attached to the electrically conductive spring cage.

6. The diagnosis plug-in connection as claimed in claim 5 and wherein the electrically conductive spring cage has two to ten spring tabs arranged around the center axis (M) of the diagnosis head.

7. The diagnosis plug-in connection as claimed in claim 5 and wherein the plurality of spring tabs are each designed to simultaneously contact the outer conductor contact of the diagnosis assembly and the inner conductor contact of the diagnosis assembly when the electrical plug connector is mated with the electrical mating plug connector.

8. The diagnosis plug-in connection as claimed in claim 5 and wherein the plurality of spring tabs are each immovably attached to the electrically conductive spring cage with the rear end of the respective spring tab oriented away from the electrical plug connector; and

the plurality of spring tabs are each movable in the direction of the center axis (M) of the diagnosis head with the respective front end oriented toward the electrical plug connector.

9. The diagnosis plug-in connection as claimed in claim 5 and wherein the plurality of spring tabs are each curved radially outwards with a central contact portion extending between the respective front end and the respective rear end in a mechanically unloaded state of the plurality of spring tabs.

10. The diagnosis plug-in connection as claimed in claim 9 and wherein a radial distance (D R ) between the central contact portion of the plurality of spring tabs and an inner radius (r i ) of the spring cage in the mechanically unloaded state of the plurality of spring tabs is smaller than a wall thickness (D W ) of the outer conductor contact of the diagnosis assembly.

11. The diagnosis plug-In connection as claimed in claim 9 and wherein the plurality of spring tabs and/or the outer conductor contact of the diagnosis assembly are configured so that insertion of the outer conductor contact mechanically loads the plurality of-spring tabs so that the plurality of spring tabs are pressed with the respective front end in the direction of the center axis (M) of the diagnosis head against the inner conductor contact of the diagnosis assembly and with the respective central contact portion on the inside and against the outer conductor contact.

12. The diagnosis plug-in connection as claimed in claim 5 and further comprising:

two groups of spring tabs are provided, and wherein;

a first group of spring tabs contact the outer conductor contact of the diagnosis assembly of the electrical plug connector when the electrical plug connector is mated with the electrical mating plug connector, and

a second group of spring tabs contact the inner conductor contact of the diagnosis assembly of the electrical plug connector when the electrical plug connector is mated with the electrical mating plug connector.

13. The diagnosis plug-in connection as claimed in claim 12 , and wherein in order to contact the outer conductor contact of the diagnosis assembly of the electrical plug connector the spring tabs of the first group are curved radially outwards at the respective front end, and/or curved radially outwards at the respective rear end and/or curved radially outwards at a central portion extending between the front end and the rear end so as to contact an inner surface of the outer conductor contact of the diagnosis assembly when the electrical plug connector is mated with the electrical mating plug connector.

14. The diagnosis plug-In connection as claimed in claim 12 , and wherein in order to contact the outer conductor contact of the diagnosis assembly of the electrical plug connector the spring tabs of the first group are curved radially inwards at the respective front end, and/or curved radially inwards at the respective rear end and/or curved radially inwards at a central portion extending between the front end and the rear end so as to contact an outer surface of the outer conductor contact of the diagnosis assembly when the electrical plug connector is mated with the electrical mating plug connector.

15. The diagnosis plug-in connection as claimed in claim 12 and wherein the spring tabs of the second group of spring tabs are curved radially inwardly at the respective front end, and/or are curved radially inwardly at the respective rear end, and/or are curved radially inwardly at a central portion of the respective spring tab extending between the front end and the rear end for contacting the inner conductor contact of the diagnosis assembly of the electrical plug connector when the electrical plug connector is mated with the electrical mating plug connector.

16. The diagnosis plug-In connection as claimed in claim 15 and wherein the front end or the rear end of each of the spring tabs of the second group of spring tabs is bent radially inwards in the direction of the center axis (M) of the diagnosis head, and wherein

an opposite end of each spring tab is connected to the spring cage.

17. The diagnosis plug-in connection as claimed in claim 12 and wherein the spring tabs of the first group of spring tabs comprises at least three spring tabs.

18. The diagnosis plug-in connection as claimed in claim 12 and wherein the spring tabs of the second group of spring tabs comprises at least two spring tabs.

19. The diagnosis plug-in connection as claimed in claim 1 and further comprising:

a first signal contact assembly of the electrical plug connector, the first contact assembly having an outer conductor contact and an inner conductor contact, and the inner conductor contact is guided within the outer conductor contact; and wherein

the electrical mating plug connector has a second signal contact assembly that has an outer conductor spring cage and an inner conductor contact element, and the inner conductor contact element is guided within the outer conductor spring cage; and

the first signal contact assembly and the second signal contact assembly can be mated with each other for electrical and mechanical contacting.

20. The diagnosis plug-in connection as claimed in claim 19 , and wherein the electrical plug connector has plural first signal contact assemblies and/or the electrical mating plug connector has plural second signal contact assemblies.

21. The diagnosis plug-in connection as claimed in claim 19 and further comprising:

a first outer housing shell of the electrical plug connector; and

a second outer housing shell of the electrical mating plug connector; and

contact chambers are defined in the first outer housing shell and in the second outer housing shell for receiving the diagnosis assembly, and/or receiving the diagnosis head and/or receiving the signal contact assemblies.

22. A mating plug connector for connection to a plug connector, the mating plug connector comprising:

a diagnosis head that has an electrically conductive spring cage for electrical and mechanical connection to an outer conductor contact of a diagnosis assembly of the plug connector; and wherein

the electrically conductive spring cage has a plurality of spring tabs, and the plurality of spring tabs are arranged around a center axis (M) of the diagnosis head and each of the plurality of soring tabs has a front end and/or a rear end that is immovably attached to the electrically conductive spring cage; and wherein

the plurality of spring tabs are each designed to simultaneously contact the outer conductor contact of the diagnosis assembly and the inner conductor contact of the diagnosis assembly; and

the electrically conductive spring cage electrically and mechanically contacts an inner conductor contact, and the inner conductor contact is guided within the outer conductor contact, of the diagnosis assembly of the plug connector when the plug connector is mated with the mating plug connector.

23. A diagnosis system comprising:

a control unit; and

a diagnosis plug-in connection, wherein the diagnosis plug-in connection comprises an electrical plug connector, and an electrical mating plug connector, and wherein the electrical plug connector has a diagnosis assembly that has an outer conductor contact and an inner conductor contact, and the inner conductor contact is guided within the outer conductor contact; and wherein

the electrical mating plug connector has a diagnosis head that has an electrically conductive spring cage for electrical and mechanical connection to the outer conductor contact of the diagnosis assembly of the electrical plug connector; and wherein

the control unit is configured to perform an electrical continuity test between the outer conductor contact and the inner conductor contact; and

the electrically conductive spring cage of the diagnosis head is configured to electrically and mechanically contact the inner conductor contact of the diagnosis assembly of the electrical plug connector when the electrical plug connector is mated with the electrical mating plug connector.

24. A method for diagnosing an electrical plug-In connection comprising the steps:

providing an electrical plug connector, the electrical plug connector having a diagnosis assembly that has an outer conductor contact and an inner conductor contact, and the inner conductor contact is inside the outer conductor contact; and

providing an electrical mating plug connector, the electrical mating plug connector having a diagnosis head with an electrically conductive spring cage; and

performing an electrical continuity test between the outer conductor contact and the inner conductor contact of the diagnosis assembly of the electrical plug connector to detect whether the electrical plug connector is in a closed condition; and wherein

the outer conductor contact and the inner conductor contact of the diagnosis assembly of the electrical plug connector are electrically conductively connected to each other via the electrically conductive spring cage of the diagnosis head of the electrical mating plug connector when the electrical plug connector is mated with the electrical mating plug connector.