EP2424046B1 - Contact element for outer conductor of a coaxial cable - Google Patents

Description

The invention relates to an outer conductor contact element with an associated coaxial cable according to the preamble of claim 1.

An electrical connection connection, in particular for the connection of an outer conductor of a coaxial cable, for example, from EP 1 573 862 B1 known. The connection connection comprises a plug-in element with a plug-in section and a sleeve extension. The plug-in portion can be plugged into a receiving opening of an electrically conductive shielded housing. The sleeve extension of the plug element to be connected to the outer conductor of the coaxial cable has an inner bore which is at least slightly larger than the outer diameter of a stripped outer conductor of a coaxial cable end.

The axial length of the inner bore passes through almost the entire axial length of the plug element, wherein at the end of the inner bore thus formed an annular shoulder is provided to form a stepped bore. As a result, the stripped to the outer conductor coaxial cable can be inserted to the stop on this annular shoulder in the plug-in element. Before the further connection with the receiving opening or after the connection to a coupling device, a soldering process can then be carried out in order to connect the outer conductor to the electrically conductive plug element with good electrical conductivity by means of the solder.

A device for connecting a coaxial cable to a device housing is also known from EP 1 709 711 B1 known.

According to this prior publication, a sleeve-shaped connection element is proposed, which is provided in the circumferential direction with a specifically formed profile groove, about which the coaxial cable end can also be mechanically anchored in a coupling element. Also in this prior art, the outer conductor is preferably soldered into the sleeve.

In addition, coaxial connectors and in particular outer conductor sleeves have become known, which can be plugged onto a stripped coaxial cable end and mechanically anchored there and electrically connected to the outer conductor of the coaxial cable. In this case, usually the outer insulation is removed at the coaxial cable end in a certain axial length, to the underlying most of an outer conductor braid and an outer conductor foil existing outer conductor is exposed. The outer conductor is folded away from the cable end, then aufzustecken a corresponding outer conductor sleeve and with its protruding away from the Koaxialkabelende circumferentially offset resilient contact tongues to be pressed onto the outer conductor braid. If necessary, a lock nut can be counter-screwed, which runs over a conical contact shoulder with the main conductor sleeve plug-in element and thereby generates radial pressing forces for contacting the contact tongues with the outer conductor braid.

In other words, it is also known to connect outer conductor sleeves to a coaxial cable end by means of clamping or crimping with the outer conductor of the coaxial cable.

In addition, an outer conductor sleeve has become known, which is provided at its connection end with an inner thread extending around its central axis. Also in this case, a Koaxialkabelende is prepared so that the inner conductor end freely protrudes over the front end of the coaxial cable over a certain axial distance, wherein the adjoining outer conductor insulation exposed and the outer conductor forming braid or a possibly provided outer conductor foil beaten back over the outer shell and is folded over, then screw a sleeve with internal thread on the outer shell. In this case, the outer conductor foil and / or the outer conductor braid is clamped between the screwed-on sleeve and the outer jacket of the coaxial cable.

In addition, a so-called compression plug is known, the sleeve-shaped plug-in approach between the External conductor foil or the outer conductor braid or between the outer conductor braid and the outer conductor sleeve and the outer insulation is pressed, including tools is required, usually at least one pair of pliers. In this case, the sleeve is plugged in a straight line to the suitably prepared coaxial cable and clamped by means of clamps in the rule, so that the sleeve is non-detachably connected and not reusable connected to the coaxial cable end.

A coaxial cable with attached coaxial cable connector is out of the US Pat. No. 6,402,550 B2 known. A coaxial cable is described with an inner conductor and a sleeve-shaped dielectric surrounding the inner conductor, wherein the dielectric is surrounded by a foil laminated with aluminum.

Then a coaxial cable connector is to be attached, wherein the sleeve body may be provided with a smooth inner surface or with a provided on the inner surface helical or screw structure. Regardless of these different configurations, the slip-on sleeve of the connector should be provided with longitudinal slots in order to be able to slide or unscrew it below the outer insulation onto the aluminum-clad outer conductor foil. Since this does not sufficiently secure fit and sufficient shielding can not be guaranteed, in all these embodiments, the use of an additional clamping ring is necessary, which must be pushed adjacent to the front end of the plugged sleeve on the outer insulation of the cable to thereby ensure a sufficiently secure interference fit long-term permanent anchorage and contacting to ensure the sleeve at the cable end.

An arrangement for a coaxial cable is also from the DE 203 20 376 U1 known. Described is an arrangement for contacting and fixing a coaxial cable by crimping, preferably on a plug assembly with a metal shell formed from two half-shells for fixing and contacting the coaxial cable. The coaxial cable is known to include an electrically conductive sheath as a shield and a sheathed by a dielectric electrical conductor, wherein the crimping is carried out on a crimp sleeve comprising the half shells. The two half shells in this case have corrugations for stiffening, which are offset in the longitudinal direction to each other, so do not give a helical structure. In this embodiment, ultimately, consisting of two half-shells metal sleeve must be attached to the cable end, that the outer conductor of the coaxial cable engages over the metal sleeve. Then the crimp sleeve must be pushed over and pressed. However, this is only possible in cases in which the outer conductor consists for example of a braid or the like and above all not firmly connected to the outer circumference of the dielectric (which surrounds the inner conductor), for example glued. Usually, the outer conductors surrounding the dielectric are not expandable as set forth in the above-mentioned prior publication in order to insert a corrugated metal shell consisting of two half-shells into a space between the outer conductor and the inner dielectric.

A coaxial cable connection system is also known from EP 1 447 881 A2 to be known as known. A removable from it Cable outer conductor is in contrast, for example, not to the above-mentioned prior publication of a smooth film or a braid, but has a complex to produce corrugated circumferential helical structure. This makes it possible to use a connector whose inner surface is adapted to the outer surface configuration of the outer conductor of the coaxial cable and so far can be turned on this outer conductor contour. Since such an unscrewing of an outer conductor sleeve leads to the thread structure of the outer conductor of the coaxial cable to no permanently secure anchoring and contacting, an additional crimping of the corresponding connection area is necessary. Therefore, in this pre-publication also spoken by a crimp connector.

A crimp sleeve for attachment to a coaxial outer conductor is also from the DE 103 43 558 A1 refer to. In order to make the crimp barrel assembly easier, it is provided that, for example, in the case of a coaxial cable, the crimp sleeve can be pushed with its cylindrical connecting jacket on the outer surface of the dielectric, in such a way that the sleeve with its wedge-shaped leading Einschneidrand on the dielectric below of the shield serving insulation jacket is introduced. Since the cylindrical sleeve body is provided internally with a wood thread, this wood thread is notched into the dielectric, wherein the outer conductor serving the electrical contact is applied loosely on the outer circumference of the sleeve. Since there is no permanent and uniform connection between the outer conductor insulation and the attached sleeve due to this condition, another sleeve-shaped Contact element are pushed and a crimping be performed.

A coaxial connector for coaxial cables with full dielectric is also from the DE 2 159 867 A refer to. Again, a solution is proposed in which the aufzudrehende sleeve is provided only on its inner side, namely on the inner side facing the insulation layer with cutting threads, which should make it possible to unscrew the sleeve on the dielectric and thereby lift the electrically conductive outer conductor braid from the dielectric and to widen. Therefore, an additional screw-on union nut must always be used for good electrical contact to produce so high radial pressing forces that the end of the widened outer conductor braid on the outer circumference of the screwed sleeve better and more firmly permanently applied by the union nut.

Also the DE 690 16 891 T2 describes a coaxial cable connector, which is due to its specific embodiment prior to assembly in the form of two metallic parts, which is to form a one-piece metal unit after assembly. The one part comprises a support, a collar and a nut, wherein the second part comprises a sleeve. To assemble the two parts, first slide the sleeve onto the end of the cable to then insert the appropriately prepared end of a coaxial cable into the so-called post and under the collar of the integral end piece. Due to the interference fit between the sleeve and the end piece, the wire mesh of the outer conductor is to be pressed against the integral end piece in order to ensure a good fit and to produce a sufficient shielding.

The object of the present invention, in contrast, is to provide an improved contact element for outer conductors of flexible coaxial cables.

The invention is solved according to the features specified in claim 1. Advantageous embodiments of the invention are specified in the subclaims.

The present invention provides an improved outer conductor contactor for outer conductors of coaxial flexible cables in which it is ensured that the contactor does not interfere with the cylindrical cross-section of an outer conductor and an associated dielectric of a coaxial cable.

The outer conductor sleeve according to the invention for flexible coaxial cable ends is characterized, inter alia, by the fact that on the inner wall of the outer conductor sleeve at least in a partial length elevating mold elements are provided over the inner wall, which extend or extend in the axial direction or helically around the central axis of the outer conductor sleeve. The dimensioning is such that the free inner cross section between the form elements in axial viewing of the outer conductor sleeve is smaller than the diameter of the outer conductor of the coaxial cable to be connected. On the other hand, the inner cross section of the surface of the outer conductor sleeve is equal to or slightly larger than the outer conductor diameter of the coaxial cable to be connected. This opens up the possibility that a corresponding outer conductor sleeve plugged directly onto the outer conductor of a coaxial cable end to be connected or can be turned on without the outer conductor, for example in the form of an outer conductor braid or in a single- or double-sided electrically conductive coated outer conductor foil away from the outer conductor end on an untreated portion of the coaxial cable outer insulator must be folded.

In particular, in the current generation of coaxial outer conductors, these outer conductors consist only partially of a woven or braided material but often of a not only one but double-sided metal-coated (for example, aluminum-coated) thin film, said outer conductor often glued to the dielectric surrounding the inner conductor are. This is especially true when the outer conductor consists of the above-mentioned generally double-sided metal-coated film.

On the other hand, since the dielectric on the other hand is relatively soft, previous attachment methods for making electrical contact with an outer conductor sleeve to the outer conductor of a coaxial cable end, in particular by clamping or crimping, have proved to be unfavorable since, given a corresponding deformation of the dielectric away from the ideal cylindrical shape, an oval Cross sectional shape deteriorate the electrical connection properties.

On the other hand, by using the outer conductor sleeve according to the invention an ideal cylindrical cross-section for the outer conductor and above all the dielectric surrounding the inner conductor is maintained, and this with a simultaneous "stiffening" of the connecting end of the coaxial cable. On the other hand, the connecting sleeve provided according to the invention can be so thinly dimensioned, ie have such a small wall thickness, that it virtually does not exceed or barely exceeds the outer diameter of the coaxial cable provided with an outer conductor insulation. Only to optimize the handling, the outer conductor sleeve can be provided with a corresponding reinforced knurling section, with a connection surface for the attachment of tools or the like.

This opens up in the context of the invention, the possibility to use such a prepared coaxial cable end, for example, junction boxes, as when tightening or clamping of electrical connection means under the action of a radial force on the inventively provided connection sleeve this maintains its ideal cylindrical shape.

Since the form elements in particular in the form of the internal thread rounded, so are not designed cut-shaped, it is ensured that when plugging or unscrewing the outer conductor sleeve z. B. on the outer conductor foil this is neither damaged during unscrewing or disassembly. In this case, the form of axially or helically formed form elements directly into the dielectric or via the outer conductor film indirectly in the dielectric press or notch, without injuring or cutting in the latter case, the outer conductor foil or the corresponding outer conductor braid. In other words, the thin-walled outer conductor sleeve forms a thread in the outer conductor foil or in the dielectric, wherein in the current generation of coaxial cables often a dielectric is used, which is relatively soft (eg. made of foamed polyethylene PE). In addition, the outer conductor foils in today's generation of coaxial cables are characterized by their relatively high ductility and tear resistance.

Another significant advantage is that the outer conductor sleeve can be pushed or screwed onto a one or two-sided metal-coated and glued on the dielectric outer conductor foil without any tools, and that while the outer conductor is indeed deformed, and so strong that the deformation to takes place in the underlying dielectric, but nevertheless the outer conductor film is not damaged or slotted. Thus, in the context of the invention, a thread-forming chip-free and germ-destroying foil causing fixation of the sleeve on the prepared Koaxialkabelende instead, with an optimal electrically permanent contact and a high clamping forces having mechanical fixation. The fact that the dielectric does not undergo any change in its material thickness also contributes to the above-mentioned advantage that a coaxial cable end provided with a sleeve according to the invention can also be used without problem for connecting connections, for example in an antenna socket, and there when tightening a contact - And fixing screw in the antenna box sleeve of the invention prevents the dielectric undergoes a deformation and thereby the transmitted antenna signal is deteriorated.

• die erfindungsgemäße Außenleiterhülse ist lösbar gestaltet, sie ist dabei auch wiederverwendbar. D. h. sie kann an neuen Kabelenden aber auch an zuvor verwendeten Kabelenden wieder aufgedreht werden;
• die erfindungsgemäße Außenleiterhülse ist dabei ohne Werkzeug montier- und demontierbar.
• Die erfindungsgemäße Außenleierhülse ist elektrisch sehr gut mit dem Außenleiter eines Koaxialkabels kontaktierbar, das es im Kontaktbereich keine großen Veränderungen des Außenleiterdurchmessers ergibt, wodurch der Wellenwiderstand der Koaxialleitung nahezu unverändert bleibt.
• Die erfindungsgemäße Außenleiterhülse trägt dabei zu einer hohen Schirmdichtigkeit bei.
• Insbesondere dann, wenn die erfindungsgemäße Außenleiterhülse mit einem Innengewinde versehen ist, besteht eine hohe Auszugsicherung und optimale Zugentlastung.
• Zudem ist im Rahmen der Erfindung ein großer Toleranzbereich für Außenleiterdurchmesser möglich.
• Die erfindungsgemäße Außenleiterhülse trägt letztlich auch zu einer Versteifung des Außenleiters bei, weshalb ein mit der erfindungsgemäßen Außenleiterhülse versehenes Kabelende auch für Klemm- und Steckverbindungen geeignet ist, und dies bei einem extrem geringen Platzbedarf.
• Die erfindungsgemäße Außenleiterhülse ist zudem auch für Koaxialkabel-Steckverbinder verwendbar.
• Die erfindungsgemäße Außenleiterhülse ist besonders für Koaxialkabel geeignet, bei denen der Außenleiter in Form einer beschichteten Außenleiterfolie vorgesehen ist, die mit dem den Innenleiter umgebenden Dielektrikum verklebt ist.
• Insbesondere bei einer Außenleiterhülse mit Innengewinde, die in den Außenleiter und das Dielektrikum ein Gewinde formt, ergibt sich eine optimale Losdrehsicherung.

Listed below are some of the main advantages that can be achieved within the scope of the invention, namely:

• the outer conductor sleeve according to the invention is detachable, it is also reusable. Ie. it can be turned on at new cable ends but also at previously used cable ends again;
• the outer conductor sleeve according to the invention can be assembled and disassembled without tools.
• The outer sleeve of the invention is electrically very well contacted with the outer conductor of a coaxial cable, which results in the contact area no large changes in the outer conductor diameter, whereby the characteristic impedance of the coaxial line remains virtually unchanged.
• The outer conductor sleeve according to the invention contributes to a high screen tightness.
• In particular, when the outer conductor sleeve according to the invention is provided with an internal thread, there is a high pull-out protection and optimal strain relief.
• In addition, within the scope of the invention, a large tolerance range for outer conductor diameter is possible.
• The outer conductor sleeve according to the invention ultimately also contributes to a stiffening of the outer conductor, which is why a cable end provided with the outer conductor sleeve according to the invention is also suitable for clamping and plug connections, and this with an extremely small footprint.
• The outer conductor sleeve according to the invention can also be used for coaxial cable connectors.
• The outer conductor sleeve according to the invention is particularly suitable for coaxial cables, in which the outer conductor is provided in the form of a coated outer conductor foil, which is glued to the dielectric surrounding the inner conductor.
• In particular, in an outer conductor sleeve with internal thread, which forms a thread in the outer conductor and the dielectric, there is an optimal Losdrehsicherung.

Above all, the invention also provides significant advantages over the known in the prior art Aufdrehsteckern, which also consist of a sleeve with an internal thread, but which are turned on an outer jacket of a coaxial cable. In this case, the outer sheath of the coaxial cable would secure the screw connection, which, however, usually consists of a much harder material than the dielectric of the coaxial cable. In other words, the inventive sleeve is much easier and more efficient to spin on the dielectric, which is made of a softer material. In addition, less space is required by the sleeve according to the invention, d. H. The sleeve according to the invention, since it is turned on the dielectric or the adhered electrically conductive outer conductor foil surrounding the dielectric, can be realized with a smaller diameter. In addition, folded braid veins of an outer conductor braid can be severed in the known prior art Aufdrehsteckern, in contrast to the inventive solution. Moreover, in the solution according to the invention the Aufdrehmoment is not adversely affected by an undefined Umlegen of the outer conductors forming braid cores, as is the rule in the art.

Figur 1a:

ein Axialquerschnitt durch ein Koaxial-Kabelende;

Figur 1b:

ein Axialschnitt durch eine erfindungsgemäße Außenleiterhülse;

Figur 1c:

ein Axialschnitt durch ein Koaxialkabelende, auf welches die erfindungsgemäße Außenleiterhülse aufgesetzt ist;

Figur 2:

ein Axialquerschnitt eines leicht abgewandelten Ausführungsbeispiels mit einer gestuften Außenleiterhülse;

Figur 3:

ein gegenüber Figur 2 abgewandeltes Ausführungsbeispiel mit einem nach außen vorstehenden Ringansatz an der Außenleiterhülse;

Figur 4:

ein nochmals abgewandeltes Ausführungsbeispiel mit einer zylinderförmigen Erweiterung für die Außenleiterhülse;

Figur 5:

eine in der axialen Länge größer dimensionierte Außenleiterhülse;

Figur 6:

ein abgewandeltes Ausführungsbeispiel mit einem separaten zusätzlich vorgesehenen Außen- oder Mantelring;

Figur 7:

ein nochmals abgewandeltes Ausführungsbeispiel;

Figur 8:

ein weiteres Ausführungsbeispiel unter Verwendung einer Überwurfmutter;

Figur 9a:

ein Axialschnitt durch ein Koaxialkabelende mit einem Außenleiter in Form einer aufgeklebten beidseitig beschichteten, elektrisch leitfähigen Außenleiterfolie und eines Geflechtes, wobei das Geflecht nicht aufgespreizt ist;

Figur 9b:

ein Ausführungsbeispiel basierend auf dem Koaxialkabelende gemäß Figur 9a mit aufgesetzter Außenleiterhülse;

Figur 10a:

ein Axialschnitt durch ein Außenleiter-Kontaktelement;

Figur 10b:

eine räumliche Darstellung der erfindungsgemäßen Außenleiterhülse;

Figur 10c:

ein Teil-Querschnitt durch einen Gewindegang der Außenleiterhülse;

Figur 11:

eine räumliche Darstellung einer abgewandelten Außenleiterhülse mit einer außen vorgesehenen Rändelung;

Figur 12:

ein weiteres abgewandeltes Ausführungsbeispiel einer Außenleiterhülse mit einer außen vorgesehenen Abflachung;

Figur 13a:

ein Axialschnitt durch ein abgewandeltes Ausführungsbeispiel mit mehreren Formelementen, die in axialer Längsrichtung verlaufen;

Figur 13b:

eine Querschnittsdarstellung bzw. Seitenansicht des Ausführungsbeispiels gemäß Figur 13a im Bereich der Formelemente; und

Figur 13c:

eine Axialschnittdarstellung durch die in dem Ausführungsbeispiel gemäß Figur 13a und 13b verwendete Außenleiterhülse.

The invention will be explained in more detail with reference to embodiments. In detail:

FIG. 1a

an axial cross section through a coaxial cable end;

FIG. 1b

an axial section through an outer conductor sleeve according to the invention;

FIG. 1c:

an axial section through a coaxial cable end, on which the outer conductor sleeve according to the invention is placed;

FIG. 2:

an axial cross-section of a slightly modified embodiment with a stepped outer conductor sleeve;

FIG. 3:

one opposite FIG. 2 modified embodiment with an outwardly projecting annular shoulder on the outer conductor sleeve;

FIG. 4:

a further modified embodiment with a cylindrical extension for the outer conductor sleeve;

FIG. 5:

an outer conductor sleeve of larger dimension in the axial length;

FIG. 6:

a modified embodiment with a separate additional provided outer or shroud ring;

FIG. 7:

a further modified embodiment;

FIG. 8:

a further embodiment using a union nut;

FIG. 9a:

an axial section through a Koaxialkabelende with an outer conductor in the form of a glued coated on both sides, electrically conductive outer conductor foil and a braid, wherein the braid is not spread;

FIG. 9b:

an embodiment based on the coaxial cable according to FIG. 9a with attached outer conductor sleeve;

FIG. 10a:

an axial section through an outer conductor contact element;

FIG. 10b:

a spatial representation of the outer conductor sleeve according to the invention;

FIG. 10c:

a partial cross section through a thread of the outer conductor sleeve;

FIG. 11:

a spatial representation of a modified outer conductor sleeve with an externally provided knurling;

FIG. 12:

a further modified embodiment of an outer conductor sleeve with a flattening provided on the outside;

FIG. 13a:

an axial section through a modified embodiment with a plurality of form elements, which extend in the axial longitudinal direction;

FIG. 13b:

a cross-sectional view and side view of the embodiment according to FIG. 13a in the area of the form elements; and

FIG. 13c:

an axial sectional view through in the embodiment according to FIGS. 13a and 13b used outer conductor sleeve.

In FIG. 1a is a schematic axial longitudinal section of a coaxial cable 1, ie a suitably prepared Koaxialkabelende 1 'and in FIG. 1b shown in axial section a first embodiment of an outer conductor sleeve 3 according to the invention, which is usually made of metal.

The coaxial cable end 1 'is prepared accordingly to set up an outer conductor sleeve 3 according to the invention.

As is known, the coaxial cable comprises an inner conductor 5, a dielectric 7 surrounding the inner conductor, an outer conductor 9 (sleeve-shaped or cylindrical outer conductor 9) surrounding the dielectric, and an outer insulation 11 which surrounds it and which is also referred to below as an insulation jacket 11.

To prepare the coaxial cable end 1 ', so much material has been removed from the insulation jacket 11, the outer conductor 9, and the dielectric 7, that a corresponding end section 5' of the inner conductor 5 projects axially. Also of the outer conductor 11 is a certain material end has been removed, so that in the illustrated embodiment, the outer conductor 9 ends before the dielectric 7, but does not have to end. In the exemplary embodiment shown, the outer conductor 9 consists of an outer conductor foil 9 "and an outer conductor braid 9 ', which surrounds the outer conductor foil 9", and which ends in the illustration according to FIG FIGS. 1a and 1c The above-mentioned outer conductor foil 9 "usually consists of a foil, which is at least on one side and usually on both opposite sides with a metallic, ie electrically conductive layer, is coated. This outer conductor foil is then adhesively bonded to the dielectric, that is to say permanently connected to the dielectric.

The insulation jacket 11 is shortened the most and ends at the earliest with respect to the furthest axially projecting end-side inner conductor end 5 ".

The outer conductor sleeve 3 according to the invention comprises a sleeve wall 3a which is at least close to the cylindrical shape and has a sleeve outer surface 3b and a sleeve inner surface 3c. As well in FIG. 1a as in FIG. 1b and also in the following figures, the longitudinal or central axis of the coaxial cable or the outer conductor sleeve is indicated by X in each case. Apart from the form elements discussed below, the coaxial sleeve is generally rotationally symmetrical.

On the cable connection side 13a, the sleeve wall 3a is provided with a conical flattening 3d, which extends over a certain axial path length, in which the sleeve wall 3a becomes increasingly thinner. In other words, the outer circumference in this area increasingly decreases toward the cable connection side 13a. The open connection side opposite to the cable connection side 13a is indicated by reference numeral 13b.

As is apparent from the cross-sectional view according to FIG. 1b can also be seen, rises in the connecting sleeve 3 of the inner surface 3c inwardly projecting above a mold element 15, in the illustrated embodiment, a helical shaped element 15a, which forms an internal thread 15'a.

To connect the thus formed outer conductor sleeve at the cable end 1 ', the outer conductor sleeve 3 is plugged with its connecting end 13a on the cable end 1' and then rotated in a corresponding direction of rotation, with the helical shaped elements 15, 15a, so the internal thread 15'a in the outer conductor film 9 "and the underlying dielectric 7 notches and thereby the outer conductor sleeve is increasingly turned on to the cable end 1 ', which is uncomplicated to perform, since the outer conductor film is usually adhered to the dielectric 7, that is not displaceable relative to the dielectric.

In this case, the outer conductor sleeve 3 is rotated with its leading in screwing direction wedge-shaped flattening 3d below the outer conductor 9 'on the outer conductor film 9 "and the underlying dielectric 7, with simultaneous slight spreading, ie widening of the outer conductor mesh 9', as shown according to Figure 1c can be seen.

The Aufdrehbewegung can be particularly easily done, since the dielectric 7 is usually not too hard, but rather softer material, namely often made of foamed polyethylene PE, which has a low dielectric constant, which is why this material is preferred. As a result of the widening of the outer conductor braid, it bears against the outer conductor sleeve 3, which has metal, or at least electrically conductive, surfaces, thereby ensuring optimum electrical contacting both to the outer conductor braid 9 'and to the outer conductor foil 9 " optimal pull-out protection combined with optimal anti-rotation lock and also optimal strain relief achieved.

In the embodiment according to FIG. 2 has the outer conductor sleeve 3 at its opposite the connection end 13a open connection side 13b a circumferential step 17, so that in this way a stepped axial bore 19 is formed with a first bore cross section 19a and an adjoining second larger bore cross section 19b. As a result, the maximum rotational movement of the outer conductor sleeve 3 is limited to the cable end 1 ', since in this case abuts the stop ring 17a thus formed at the front end of the dielectric 7.

In the variant according to FIG. 3 a corresponding stop ring 17b is not provided on the inside but on the outside, namely in the form of a gradation 17 which widens toward the connection end 13b and which then does not run up at the front end of the dielectric 7 but at the front end of the insulation jacket 11. Optionally, a remainder 9a of the widened outer conductor braid 9 'sandwiched between the front end of the insulating jacket 11 and the gradation 17.

In the embodiment according to FIG. 4 is the outer conductor sleeve 3, that is, the radially outwardly projecting stop ring 17b, provided with a direction away from the terminal end 13b extending cylindrical projection 17c, the outer insulation 11, ie the insulating jacket 11, yet overlaps over an axial length outside. As a result, the outer circumference of the insulation jacket 11 is not only encompassed by the outer conductor sleeve 3 over a certain axial distance, but also protected. The radial width of this annular groove 17b therefore corresponds approximately to the thickness of the insulation jacket 11 plus the thickness of the outer conductor braid 9 '. This also contributes to some stiffening (kink protection) of the coaxial cable thus connected to the outer conductor sleeve 3.

In the variant according to FIG. 5 the outer conductor sleeve 3 is formed so that the inner conductor 5 shown in the preceding figures is not over the open terminal end 13b over but ends at least just before the front-side open terminal end 13b within the cylindrical connecting sleeve 3.

In the embodiment according to FIG. 6 is in deviation from the embodiment according to FIG. 4 the outer conductor sleeve 3 is not provided with a cylindrical extension 17b, which is part of the outer conductor sleeve 3, but instead a separate Aufsteckzylinder 21 is provided. This is preferably further away from the actual cable end during assembly of the outer conductor sleeve pushed, where it rests loosely on the outer circumference of the insulation jacket 11. After mounting the outer conductor sleeve 3 with widening of the outer conductor braid 9 'and thus with slight expansion of the insulation jacket 11 then the Aufsteckzylinder 21 can be moved in the direction of cable end, until it reaches a maximum of the radially outwardly projecting step 17 and abuts there. As a result, an increased pull-out protection and Losdrehsicherheit is guaranteed.

In the variant according to FIG. 7 only the inner conductor 5 has been exposed by removal of the dielectric, the outer conductor and the insulation jacket 11. In other words, terminate dielectric 7, outer conductor 9 and insulating jacket 11 more or less in a same perpendicular to the extension direction X of the coaxial cable extending plane, in which case the outer conductor sleeve 3 is provided with a radially projecting flange 23, which then at the front end of the insulating jacket 11 and the outer conductor 9 is applied. The outer conductor sleeve 3, in turn, forms a thread in the outer conductor foil 9 "as well as in the underlying dielectric 7 and simultaneously expands the outer conductor braid 9 ' FIG. 7 is shown) or over the open terminal end 13 b survive as exemplified by the FIGS. 1 to 4 is shown.

at FIG. 8 it is a modification of the embodiment according to FIG. 4 , In the embodiment according to FIG. 8 Furthermore, a union nut 25 is still provided, the cable end towards a radial recess 25a with an internal thread 25b provided there, which can then be screwed onto an external thread 17'c of the cylindrical extension 17c of the outer conductor sleeve 3.

Since the union nut 25 extending away from the cable end with a decreasing inner diameter to form a slope 25c, ie oblique or tapered contact shoulder 25c is formed when tightening the nut the investment slope 25c increasingly turned on the extended in the outer conductor sleeve outer diameter of the insulation jacket 11 , whereby radial pressing forces in the region of the outer conductor sleeve 3 are generated. In other words, the cone 25 c leads to increase the clamping forces with which the cable sheath 11 is pressed. This also contributes to an increase in the pull-out and Losdrehsicherheit. In addition, also in this embodiment, similar to the variant according to FIG. 4 and 6 also ensures improved kink protection of the cable end.

Due to the described positioning of the outer conductor sleeve within the actual outer conductor 9 also results from the thereby caused spreading of the outer conductor braid 9 'that a theoretical risk of short circuit - as in the prior art - is avoided, since the braided core 9' and the inner conductor by the interposed Außenleiterhülse are clearly separated from each other.

In the embodiment according to FIGS. 9a and 9b it is now an embodiment in which the outer conductor sleeve has a larger inner diameter than the outer conductor braid 9 'has. The outer conductor foil 9 "in turn consists of a foil material, which is preferably coated on both sides with a metallically conductive layer The outer conductor foil therefore preferably has not only on the inner side, ie sides facing the dielectric 7, or on its outer side, ie the outer conductor braid 9 '. but on both sides of a metallically conductive layer.The thus formed outer conductor foil 9 "is glued as a rule over its entire surface with the outer jacket of the dielectric 7.

In this case, the outer conductor sleeve 3 according to the invention with its form elements, ie its helical shaped using the embodiments shown 15a forming the internal thread 15'a on the outer conductor braid 9 'are turned on, with the internal thread 15'a on the outer conductor braid 9' and the Outer conductor film 9 "digs into the dielectric 7 and notched, as shown by the sectional view FIG. 9b is clarified.

However, the fastening method of the outer conductor sleeve 3 explained above also works in the case of an outer conductor 9 which, for example, consists only of an outer conductor braid 9 'or only of an outer conductor foil 9 ".

The illustrated form elements 15, 15a, 15'a are provided in a longitudinal zone Z, which extend in a partial length of the axial total length of the outer conductor sleeve about the central longitudinal axis X, that is from the inner surface 3c of the outer conductor sleeve inside, usually raise radially. This zone may be at a distance from Start connecting end 13a and end at an even greater distance to the terminal end 13b.

Based on FIGS. 10a . 10b and 10c is the previously explained embodiment of a Außenleierhülse 3 again in enlarged axial section, shown in a three-dimensional view and in a section to illustrate that the mold elements 15 are rounded at their respective inner surface or inner wall 3c remainder 16 survey, so rounded the thread crests are, so when turning the threaded sleeve according to the invention, especially when turning on the outer conductor foil 9 "this can not be severed by too pointed thread elevations 16 and injured.

As a result of this thread configuration, that is to say the design of the shaped elements 15, it is found that by turning the outer conductor sleeve in relation to the dielectric and the outer conductor foil surrounding the dielectric, it is thread-forming, ie a corresponding negative thread form penetrates into the dielectric 7 and the outer conductor foil 9 from the outside Furthermore, in the threaded area, the realization of a trilobular geometry is possible, whereby smaller torque torques can be realized.

In addition, the beginning as the end 16a and 16b of the mold elements 15, here so the internal thread 15'a provided with a corresponding flattening 16 ', whereby the internal thread 15'a when twisting on the cable end, ie when unscrewing on the dielectric 7 and the outer conductor foil 9 "is formed in a thread-forming manner, since the corresponding threaded end 16b is also provided with a corresponding flattening is, it is also ensured here that when twisting the outer conductor sleeve neither the dielectric nor the outer conductor is injured, for example in the form of the outer conductor braid or the outer conductor foil, in particular is severed.

Likewise, the threaded end 16b, for example, be executed blocking against loosening.

Based on FIG. 11 it is shown that the outer conductor sleeve 3 can be provided at least in an axial portion with a sleeve portion 27, the gripping surfaces 28 includes, for example in the form of a knurling 28 'shown. As a result, the up but also the twisting on a cable end is much easier. In the embodiment according to FIG. 12 In addition, an engagement surface 30 is provided on the sleeve outer surface 3b, for example in the form of a flat 30 '. This flattening can serve as a grip surface or as a tool engagement surface.

Finally, a still slightly modified embodiment according to the FIGS. 13a to 13c referenced, in which a corresponding outer conductor sleeve 3 is shown, which may be designed from the basic structure according to the embodiments described so far.

Different from the preceding exemplary embodiments, mold elements 15 which extend in the longitudinal direction are provided as mold elements 15b projecting inside the outer conductor sleeve 3 over the sleeve inner surface 3c, in particular in the form of so-called ribs or webs 15'b. These ribs or webs should also be rounded in the region of their highest elevation, whereby here too these shaped elements 15 are preferably provided in the insertion direction, ie at the beginning 16a as at their end 16b with a corresponding flattening 16b. These shaped elements in the form of ribs or webs are preferably projecting radially inwards, ie perpendicular to the corresponding section of the cylinder wall 3 a of the outer conductor 3, and point to their beginning and their end over the entire length, similar to the thread-shaped form elements 15 a, 15 'a, an equal radial height. They extend in the axial longitudinal direction X of the outer conductor sleeve, wherein a plurality of such web or rib-shaped form elements 15b are arranged offset in the circumferential direction to each other usually, preferably at the same height, based on the longitudinal extent of the outer conductor sleeve 3. The zone Z, the If the longitudinal zone Z, in whose axial direction X the shaped elements 15, 15a, 15b, etc., are formed, can vary within wide ranges and amount to between 10% to 200% of the diameter of the outer conductor sleeve 3, preferably between 20% and 150%, in particular between 30% and 100%. In other words, the length should preferably be more than 10%, 20%, 30%, 40% or 50% of the diameter of the outer conductor sleeve and preferably less than 200%, in particular less than 150%, 100%, 90%, 80%, 70%, 60% or in individual cases even less than 50% of the diameter of the outer conductor sleeve make.

The height of the bar-shaped or helical shaped elements can amount to, for example, 10% of the diameter of the outer conductor sleeve, ie in particular between 1% and 20%, 2% and 18%, 4% and 16%, etc. Preferably, this height is between 8% and 12% of the diameter the outer conductor sleeve 3.

The thickness of the form elements is to be selected so that the maximum elevation 16 "is not sharp-edged but rounded, in other words the thickness of the threads or the ribs or webs of the form elements is between 0.2 mm and 1 mm, preferably between 0.3 mm and 0.8 mm or 0.4 mm and 0.6 mm, in particular by 0.5 mm .On the same order of magnitude is also the height of the mold elements.

The pitch of the helical shaped elements, ie the distance between the thread crests, can vary, for example, by 1 mm to 3 mm. There are no restrictions in this respect.

In the embodiment according to FIGS. 13a to 13c are four offset in the circumferential direction at 90 ° and extending in the axial longitudinal direction web-shaped elements 15 are provided, wherein at least two, three or four such mold elements should be provided, even five or six such circumferentially offset webs or more can be used.

A thus formed outer conductor sleeve 3 is then axially (ie not under a rotary motion) plugged onto the cable end, the outer conductor sleeve 3 with its flattening 3d then between the outer conductor foil 9 "and the outer conductor braid 9 '(as basically shown in the preceding embodiments) or as in the embodiment according to FIG. 9b between the outer conductor braid 9 'and the inside of the cable sheath 11 is inserted axially.

Also in this case, an easily mountable, also releasable, a good electrical contact to the outer conductor producible outer conductor sleeve 3 is used, which has an extremely small maximum outer diameter, and therefore preferably can also be used for plug and clamp connections.

Claims (16)

1. Outer conductor contact element comprising an associated coaxial cable (1), the outer conductor contact element being screwed or plugged onto a cable end (1') of a coaxial cable (1), having the following features:

   - the coaxial cable (1) comprises an inner conductor (5), a dielectric (7) that surrounds the inner conductor (5), an outer conductor (9) that surrounds the dielectric (7) and is in the form of an outer conductor foil (9") or in the form of an outer conductor foil (9") that is surrounded by an outer conductor braid (9'), and a cable sheath (11) that surrounds all of the components,

   - at least one shaped element (15'; 15a, 15b) is provided inside the outer conductor contact element formed in the manner of an outer conductor sleeve (3), at least in a longitudinal region (Z) of the outer conductor sleeve (3),

   - the at least one shaped element (15; 15a, 15b) comprises at least one shaped element (15) that rises inside the outer conductor sleeve (3) from the inner surface (3c) of the sleeve and that extends helically around the axial central axis (X), or a plurality of shaped elements (15; 15b) that extend in the axial longitudinal direction and that are arranged so as to be offset from one another in the circumferential direction,

   - the connection side (13a) of the outer conductor sleeve (3) is screwed or plugged onto the coaxial cable end (1') of the coaxial cable (1) at least over a part of the length thereof,

   - the outer conductor sleeve (3) is screwed or plugged onto the coaxial cable end (1') such that the at least one or the plurality of shaped elements (15; 15a, 15b) notches and/or pushes into the outer conductor (9) below the cable sheath (11) or into the outer conductor foil (9") below the outer conductor braid (9'),

   - the outer conductor sleeve (3) electrically contacting the outer conductor (9) of the coaxial cable (1) in a manner in which the cable shield is held tight,

   characterised by the following additional features:

   - the height of the shaped elements (15; 15a, 15b) by which said elements rise above the inner surface (3c) of the sleeve is between 0.2 mm and 1.0 mm,

   - the starting region (16a) of the at least one shaped element (15; 15a, 15b) is provided with a flat portion or ramp (16'),

   - the tallest projections (16) of the at least one shaped element (15; 15a, 15b) have rounded edges, and

   - the outer conductor sleeve (3) is screwed or plugged onto the coaxial cable end (1') such that the at least one shaped element (15; 15a, 15b) notches and/or presses through the outer conductor foil (9") into the dielectric (7) located therebelow.
2. Outer conductor contact element comprising an associated coaxial cable (1) according to claim 1, characterised in that the shaped element (15) is formed as a helical shaped element (15a) in the manner of at least one thread turn (15'a).
3. Outer conductor contact element comprising an associated coaxial cable (1) according to either claim 1 or claim 2, characterised in that the helical shaped element (15a, 15'a) is thread-like.
4. Outer conductor contact element comprising an associated coaxial cable (1) according to claim 1, characterised in that at least two shaped elements (15; 15b), preferably at least three or four shaped elements (15; 15b), are provided that are arranged so as to extend in the longitudinal region (Z) in the circumferential direction parallel to the axial longitudinal direction (X) and preferably so as to be offset from one another at a uniform spacing in the circumferential direction.
5. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 4, characterised in that the end region (16b) of the at least one shaped element (15; 15a, 15b) is also provided with a flat portion or ramp (16').
6. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 5, characterised in that the outer conductor sleeve comprises gripping surfaces (28), preferably in the form of a knurling (28'), on the outer circumference (3b) thereof at least over a part of the axial length of the outer conductor sleeve (3).
7. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 6, characterised in that the outer conductor sleeve (3) comprises, at least over a part of the length thereof, an engagement surface (30), preferably in the form of at least one flat portion (30').
8. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 7, characterised in that the height of the shaped elements (15; 15a, 15b) by which said elements rise above the inner surface (3c) of the sleeve is between 0.3 mm and 0.8 mm.
9. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 8, characterised in that the shaped elements (15; 15a, 15b) have a thickness in the base region adjacent to the inner surface (3c) of the sleeve or in the central region of said elements that is between 0.2 mm and 1 mm, preferably between 0.3 mm and 0.8 mm.
10. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 9, characterised in that the outer conductor sleeve (3) has an axial length (X) and is screwed or plugged onto the cable end (1') until an inner conductor (5) that is exposed accordingly protrudes above the free connection end (13b) of the outer conductor sleeve (3).
11. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 10, characterised in that the outer conductor sleeve has an axial length (X) and is screwed or plugged onto the cable end (1') until an inner conductor (5) that is exposed accordingly ends inside the outer conductor sleeve (3).
12. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 11, characterised in that the outer conductor sleeve (3) is formed so as to have a shoulder, ring or a corresponding gradation (17; 17a, 17b) that projects radially inwards or that projects radially outwards.
13. Outer conductor contact element comprising an associated coaxial cable (1) according to claim 12, characterised in that the outer conductor sleeve (3) is provided with a radial shoulder (17) which projects outwards from the connection end (13b) of said sleeve and from which a cylinder (17c) extends away from the free connection end (13b), specifically forming an annular groove.
14. Outer conductor contact element comprising an associated coaxial cable (1) according to claim 13, characterised in that the cylinder (17c) is provided with an inner or outer thread into or onto which a coupling nut (25) can be screwed.
15. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 14, characterised in that a plug cylinder (21) that is separate from the outer conductor sleeve (3) is provided at the cable end (1') ahead of the outer conductor sleeve (3) and encloses the cable sheath (11) and is preferably retained therein.
16. Outer conductor contact element comprising an associated coaxial cable (1) according to any of claims 1 to 15, characterised in that the coaxial cable (1) is flexible, the outer conductor foil (9") thereof being bonded to the dielectric (7).

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