Shielded plug connector with spring sleeve

Abstract

The invention relates to a plug connector, which is arranged on one end of a shielded conductor (10), having a housing made of a metal material, which is electrically connected to a shielding layer (11) of the shielded conductor (10), a spring sleeve (12) is provided, which is pushed below the shielding layer (11) of the wire (10), and wherein the spring sleeve (12) is inserted into the shielding layer (11) of the wire (10), and wherein the spring sleeve (12) is inserted into the shielding layer (11) of the wire (10). The outer surface of the spring sleeve (13) is at least partially, in particular completely, in electrical contact with the shielding layer (11) of the conductor (10).

Description

TECHNICAL FIELD

[0001] The invention relates to a shielded plug connector according to the features of the preamble of claim 1. BACKGROUND

[0002] It is generally known that a plug connector is provided on the end of a shielded conductor, which plug connector has a housing made of a metallic material, which is electrically connected to the shield of the conductor, for looping through the shield from the conductor via the plug connector, which can be plugged together with a correspondingly formed mating plug connector.

[0003] In the prior art, various structures are known for electrically contacting the shield of a conductor to the housing of a plug connector. In one structure, a Pflitsch spring is applied on the outer surface of the exposed shield of the conductor, which spring is electrically contacted to the conductor shield concentrically on the inside. This Pflitsch spring is attached to the housing contour concentrically on the outside, i.e. with its outer surface, for example as a knurled nut. SUMMARY

[0004] The object of the invention is to improve this connection of the conductor shield to the metallic housing of the plug connector.

[0005] This object is achieved by the features of claim 1.

[0006] According to the invention, a spring sleeve is provided, which is pushed under the shield of the conductor, in particular under the shield braid or the shield film of the conductor. This means that the outer surface of the spring sleeve is at least partially, in particular completely, in electrical contact with the shield, preferably the shield braid, of the conductor. The inner contour of the spring sleeve is attached to the jacket of the at least one electrical conductor of the conductor. Optionally, the jacketed conductor or the jacketed individual conductors can be surrounded by a further jacket, which is received in the interior of the spring sleeve.

[0007] The spring sleeve forms a one-piece continuous component without openings, slits or the like. In the simplest construction design, the spring sleeve is therefore a tubular, cylindrical structure, which preferably has a circular cross-section, although other cross-sections (e.g. oval, square, rectangular, etc.) can also be considered. As an alternative, however, the spring sleeve can also be provided with at least one opening and / or at least one slit in order to achieve a spring effect or a clamping effect when the spring sleeve is pushed under the shield and thus simultaneously onto the at least one electrical conductor or its jacket. If there is only one slit, this slit extends axially from one end of the spring sleeve to the other, wherein the spring sleeve widens slightly when the spring sleeve is pushed on.

[0008] After the spring sleeve has been arranged on the conductor wire in the above-described manner and is in contact with the shielding layer of the conductor wire (by abutment, optionally as an alternative or in addition by press-fitting, electro-adhesion, soldering, welding, etc.), a shielding housing made of a metallic material is arranged at least over the axial length of the spring sleeve, optionally beyond one or both end regions of the spring sleeve. The shielding housing can be designed as one piece, but is preferably composed of two parts, in particular two identical halves.

[0009] Above the shielding housing, a further housing is arranged, which can constitute the outer housing of the plug connector. This outer housing, likewise made of a metallic material, is in electrical contact with the shielding housing, so that the shielding layer is thus connected in a circuit from the conductor wire up to the mating plug connector. The further housing can be designed as a screw connection, meaning that, after the plug connector has been plugged together with a mating plug connector, the further housing can be rotated relative to the spring sleeve (but cannot be axially displaced relative to the spring sleeve or the conductor wire) and can be screwed to a correspondingly designed mating plug connector.

[0010] Inside the further housing, a contact carrier is arranged, which is preferably made of an electrically non-conductive material, which receives at least one contact of the electrical conductor of the conductor wire, usually a plurality of contacts if the conductor wire comprises a plurality of electrical conductors.

[0011] After the further housing (screw connection) has been arranged, it is possible to consider filling the interior, in particular the contact carrier and around the contact carrier, with an electrically non-conductive material, in particular to injection-mould the interior cavity with such a material.

[0012] In one embodiment, the injection-moulding is carried out in such a way that the injection-moulding encloses the end-side portion of the further housing (screw connection) and the spring sleeve up to an end-side region of the conductor wire. BRIEF DESCRIPTION OF DRAWINGS

[0013] Such an embodiment is shown in the drawings. DETAILED DESCRIPTION

[0014] In the left-hand half of the drawing, a corner plug connector is shown, and in the right-hand half of the drawing, a straight plug connector is shown, both of which are assembled and produced according to the application.

[0015] In the lower right-hand part of the right-hand half of the drawing, the finished straight plug connector is shown, and in the two upper drawings, the individual components and assembly steps thereof can be seen.

[0016] In the lower left of the left-hand half of the drawing, a finished angled plug connector is shown, the individual components and assembly steps of which can be seen in the two upper diagrams.

[0017] The respective finished plug connector is arranged on the end of a conductor 10. This conductor 10 is a shielded conductor which has a shielding layer 11, in particular a shielding braid, a shielding film or the like, under its outer jacket. Under the shielding layer, in the interior of the conductor 10, there is at least one electrical conductor, usually a plurality of electrical conductors, which each have their own outer jacket. The conductor 10 is, for example, a two- or four-core twisted pair. According to the application, a spring sleeve 12 is inserted / pushed between the outer jacket of the at least one electrical conductor and the inner contour of the shielding layer 11. As an alternative, it is also possible to push the spring sleeve 12 onto the one electrical conductor or the plurality of electrical conductors and then to arrange the shielding layer 11 over a partial region or the entire axial extension of the spring sleeve 12. In any case, with the spring sleeve 12 according to the application, it is avoided that the shielding layer 11, in particular the shielding braid, is disintegrated or is forced to deform in the direction of the outer jacket of the conductor 10, since this would reduce the shielding performance. The shielding layer 11 as well as the one / plurality of ends of the electrical conductors are surrounded by a shielding housing 13, in the ends of which electrical conductors there are respectively arranged one contact 14. The respective contact 14 is arranged in a contact carrier 15 made of a non-conductive material, in particular a plastic suitable for the use purposes of the plug connector. A shielding sleeve 16 made of a conductive material is arranged coaxially over the contact carrier 15 and is in operative connection with the shielding housing 13 after assembly. A screw connection 17 which is rotatably supported relative to the fixed shielding sleeve 16 is likewise arranged coaxially over a partial region of the shielding sleeve 16. By means of the screw connection 17, the finished plug connector is plugged together and screwed with a mating plug connector, not shown in the drawing, in order to prevent the plug connection from coming loose.

[0018] As can be seen in the figures, the shield housing 13 is composed of two half-shells. The two half-shells are essentially identical, with the exception of a pin on one half-shell and a corresponding recess in the other half-shell for receiving the pin. The shield housing 13 can also be composed in one piece or of more than two parts. The shield housing is arranged with one end thereof over the exposed area of the shield layer 11, wherein an electrical contact is thus also established between the shield layer 11 and the shield housing 13, which is also composed of an electrically conductive material. Here, the spring sleeve 12, which is inserted between the outer jacket of the respective electrical conductor and the inner contour of the shield layer 11, also contributes to stabilizing the area of abutment between the shield layer 11 and the shield housing 13, so that an effective electrical contact is achieved. The end of the contact 10, which is directed towards the conductor 10, is moved in the direction of the conductor 10, so that the contact 14 is inserted into the corresponding contact cavity of the contact carrier 15. At the same time, the electrical contact of the one end of the shield housing 13 with the other end of the shield sleeve 16 assigned to this end is also achieved. The completed state of this assembly step can be seen in the middle illustration of the right-hand side view of the straight plug connector. Thereby, it is ensured that the shield layer 11 of the conductor 10 continues up to the shield sleeve 16 or the screw connection 17. Thus, it is further achieved that, when the plug connector is plugged together with a mating plug connector, the shield layer 11 of the plug connector is connected in a loop to the mating plug connector. Thereby, a continuous shielding is achieved.

[0019] As can also be seen in the lower right-hand side illustration of the right-hand side view, a compression ring 18 is arranged next to the screw connection 17 in the direction of the conductor 10. This compression ring 18 holds the two half-shells of the shield housing 13 together and facilitates the abutment of the screw connection 17 when this is rotated relative to the compression ring 18. In addition, an injection-molded encapsulation 19 can be provided (but is not necessarily) over the contact carrier 15, in particular over the shield housing 13, up to the area of the end of the conductor 10. Such an injection-molded encapsulation 19 protects the finished plug connector from external influences and can be easily and quickly manufactured. As an alternative to the injection-molded encapsulation 19, a separate housing can also be considered. This housing can also be composed, for example, of two (identical or essentially identical) half-shells or of more than two parts.

[0020] The above explanations relating to the straight embodiment of the plug connector according to the application apply almost analogously also to the corner embodiment of the plug connector according to the application shown on the left in the drawing. Due to the corner embodiment, only the shield housing 13 (or the two half-shells which make up the shield housing 13) is designed differently in this case and as shown. Furthermore, the screw connection 17 in the straight plug connector also has knurling, whereas the screw connection 17 in the corner plug connector has partial sections which are angled to one another. The screw connection 17 of the straight plug connector can thus be operated manually, whereas the screw connection 17 of the corner plug connector can be operated using a tool. The reverse design or other designs can also be considered for the operation of the screw connection 17.

[0021] The principles of the application are explained further below in the form of key words.

[0022] - the shield braid 11 of the conductor is cut to the appropriate length, but not further modified.

[0023] - the spring sleeve 12 is pushed under the shield braid 11 of the conductor 10.

[0024] In the prior art, the shield braid is usually drawn, so that the braid is spread out.

[0025] It is usually drawn even further back onto the sheath, in order to be drawn forward again for connection in the subsequent production process.

[0026] The shield housing 13 (preferably in two parts) is fitted on the outside of the shield braid.

[0027] The shield housing 13 has an anti-twist with respect to the contact carrier assembly 15 / shield sleeve 16.

[0028] The shield housing 13 is preferably not filled with plastic in the inner region.

[0029] The shield housing 13 is joined with pins or holes, for example by riveting. Other joining types are also possible.

[0030] Injection-moulded encapsulation 19 of the assembly.

[0031] Arrangement of the pressure ring 18.

[0032] List of reference signs

[0033] 10 conductor

[0034] 11 shield (in particular shield braid)

[0035] 12 spring sleeve

[0036] 13 shield housing

[0037] 14 contact point

[0038] 15 contact point holder

[0039] 16 shield sleeve

[0040] 17 threaded connection

[0041] 18 compression ring

[0042] 19 injection-molded encapsulation

Claims

1. A plug connector disposed at one end of a shielded wire (10), the plug connector having a housing made of a metallic material electrically connected to a shielding layer (11) of the shielded wire (10) so as to provide a loop from the wire (10) through the shielding layer (11) via a plug connector capable of being inserted into a correspondingly configured mating plug connector, characterized in that, A spring sleeve (12) is provided, which is pushed under the shielding layer (11) of the conductor (10), and thereby the outer surface of the spring sleeve (13) is at least partially, and in particular completely, in electrical contact with the shielding layer (11) of the conductor (10).

2. The plug connector according to claim 1, characterized in that, The spring sleeve (12) forms an integral, continuous component without openings, gaps, or similar parts.

3. The plug connector according to claim 1, characterized in that, The spring sleeve (12) is provided with at least one opening and / or at least one slit.

4. The plug connector according to claim 1, 2 or 3, characterized in that, At least part of the axial length of the spring sleeve (12), optionally extending beyond one or both ends of the spring sleeve, is provided with a shielding housing (13) made of metallic material.

5. The plug connector according to claim 4, characterized in that, The shielding housing (13) is formed as one piece or consists of two parts, particularly having two halves of the same design or substantially the same design.

6. The plug connector according to claim 4 or 5, characterized in that, An additional housing, particularly a shielding sleeve (16), is arranged above the shielding housing (13). This additional housing constitutes the outer housing of the plug connector and is made of a metallic material. This outer housing is in electrical contact with the shielding housing (13).

7. The plug connector according to any one of claims 1 to 6, characterized in that, The shielding layer (11) is a shielding braided layer or a shielding film.

8. The plug connector according to claim 6 or 7, characterized in that, Within the additional housing, particularly within the shielding sleeve (16), a contact support (15), preferably made of a non-conductive material, is arranged to receive at least one contact (14) of the electrical conductor of the wire (10).

9. The plug connector according to claim 6, 7 or 8, characterized in that, The interior of the additional housing, particularly within and around the contact support (15), is filled with a non-conductive material.

10. The plug connector according to any one of claims 4 to 9, characterized in that, A pressure ring (18) is arranged on the shielding housing (13).

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