Connector element for a connector system for providing releasable electrical connection between components of a chain transmitting electrical signals

1 . A connector element for a connector system, said connector element comprising:

four contact members for making electric contact on a front side of the connector element; and

a contact member carrier, wherein the contact member carrier comprises a circumferentially extending contact surface having an axial extent;

wherein the contact members extend in an axial direction on the circumferentially extending contact surface of the contact member carrier;

wherein, on the circumferentially extending contact surface of the contact member carrier, the contact members have a free contact surface which is accessible on the circumferentially extending contact surface of the contact member carrier;

wherein each of the contact members has an insulation radius, the insulation radius being, when measured in a view onto the front face, a minimum clearance between outer boundaries of a respective one of said contact members and a closest neighbouring one of the contact members to the respective one of said contact members;

wherein the contact members are grouped into two groups such that, for each of the contact members, the closest neighbouring one of the contact members, which defines the respective contact member's insulation radius, belongs to a different one of the two groups of the contact members from the respective one of the contact members.

2 . The connector element of claim 1 , wherein:

the contact members are arranged on corners of a tetragon;

the tetragon has at least two parallel sides; and

the parallel sides of the tetragon extend at least between the contact members of each of the two groups of contact members.

3 . The connector element of claim 1 , wherein:

the contact members extend axially through the contact member carrier and project on a back side of the contact member carrier with projecting sections of the contact members;

the projecting sections of each of the two groups of contact members have common tangents; and

the common tangent of the projecting sections of a first one of the two groups of contact members on a side facing the projecting sections of a second of the two groups of contact members is parallel to the common tangent of the projecting sections of the second group of contact members facing the projecting sections of the first one of the two groups of contact members, whereby a clear space is provided between the projecting sections of the first group of contact members and the projecting sections of the second group of contact members.

4 . The connector element of claim 3 , wherein:

on its back side, the connector element comprises at least one alignment structure, configured and adapted for receiving and aligning a printed circuit board;

the at least one alignment structure comprises at least one axially extending support notch formed in the at least one alignment structure, the at least one support notch configured to receive a printed circuit board when the printed circuit board is advanced into the support notch along the axial direction of the connector element while two faces of the printed circuit board extend in an axial direction of the connector element and in a radial direction of the connector element;

the at least one support notch extends in an axially extending plane between the two groups of contact members; and

a first one of the at least one support notch extends radially to a greater extent than a further support notch on the radially opposite side of the connector element.

5 . The connector element of claim 4 wherein:

the first one of the at least one support notch extends radially entirely through one of the at least one alignment structure and an alignment structure wall on a radially opposite side of the connector element is closed on a radially outer side.

6 . The connector element of claim 1 , wherein:

the contact members extend axially through the contact member carrier and project on a back side of the contact member carrier with projecting soldering lugs.

7 . The connector element of claim 1 , wherein:

the circumferentially extending contact surface of the contact member carrier is cylindrical.

8 . The connector element of claim 1 , wherein:

the contact member carrier comprises a peg; and

the circumferentially extending contact surface of the contact member carrier is provided on the lateral surface of the peg.

9 . The connector element of claim 8 , wherein:

the peg extends from a cylindrical section of the connector element having a larger cross-sectional dimension than the peg;

the cylindrical section comprises at least one circumferential groove on its outer diameter; and

the circumferential groove is configured to receive an O-ring therein.

10 . The connector element of claim 1 , wherein:

the contact member carrier comprises a socket, the socket having an axially extending wall limiting the socket and forming the circumferentially extending contact surface.

11 . The connector element of claim 1 , wherein:

a locking sleeve is revolvably and axially mobile received on the connector element.

12 . An electronic device comprising:

the connector element of claim 3 ; and

a printed circuit board, wherein the printed circuit board is received in the clear space between the projecting sections of the first group of contact members and the projecting sections of the second group of contact members and the projecting sections of the contact members are soldered directly to conductor paths of the printed circuit board.

13 . The electronic device of claim 12 , wherein:

a housing is provided which encases the printed circuit board and at least a part of the connector element; and

an O-ring sealing is provided between the connector element and the housing.

14 . A system comprising:

the connector element of claim 1 as a first connector element; and

a second one of the connector element as a second connector element;

wherein the contact member carrier of the first connector element comprises a peg;

wherein the circumferentially extending contact surface of the contact member carrier of the first connector element is provided on the lateral surface of the peg;

wherein the contact member carrier of the second connector element comprises a socket, the socket having an axially extending wall limiting the socket and forming the circumferentially extending contact surface:

wherein the peg of the first connector element has an outer axially extending surface forming the circumferentially extending contact surface of the first connector element and the socket of the second connector element has an axially extending surface forming the circumferentially extending contact surface of the second connector element;

wherein the socket and the peg are complementary to each other such that the peg is receivable inside the socket, whereby, when the peg is received inside the socket, at least one of the contact members on the circumferentially extending contact surface of the peg and one of the contact members on the circumferentially extending contact surface of the socket make electric contact with each other.

15 . A signal transmission device comprising:

the connector element of claim 6 ; and

a signal cable having at least four wires, wherein at least one wire is connected to each of the soldering lugs, and a sealing sleeve is placed over the cable in a sealing relationship and covering the back side of the contact member carrier and the soldering lugs and is configured to provide at least liquid-proof sealing of the inner space including the soldering lugs.

16 . A method for assembling the electronic device of claim 12 , the method comprising:

providing the connector element;

mounting an O-ring into the at least one circumferential groove on a cylindrical section of the connector element;

providing a printed circuit board and placing a first end of the printed circuit board in the clear space between the projecting sections of the first group of contact members and the projecting sections of the second group of contact members;

providing a housing comprising a cylindrical inner diameter dimensioned to achieve sealing with the O-ring provided on the connector element;

directly soldering the projecting sections of the first group of contact members to respective conductor paths provided on a first side and at the first end of the printed circuit board and directly soldering the projecting sections of the second group of contact members to respective conductor paths provided on a second side at the first end of the printed circuit board; and

connecting one of a pluggable connector or a sensor to a second end of the printed circuit board opposite the first end of the printed circuit board, said one of the pluggable connector or sensor comprising a radially extending structure configured as an axial end stop for the housing, and axially displacing the housing over the connector element towards one of the pluggable connector or sensor until the housing engages the end stop.

17 . The connector element of claim 1 , wherein:

said connector element includes no more and no less than the four contact members.