EP1779474B1 - Angled plug-in connection comprising a retaining element that defines the working position of the two angled limbs - Google Patents

Abstract

An electric angled plug-in connector ( 1 ) is provided having an insulating body that is arranged in a first angled limb ( 2 ) and that contains electric contacts. One or more electric wires extend through a second angled limb ( 3 ). The two opposing faces ( 2 a , 3 a) of the angled limbs ( 2, 3 ) that lie in the angled area are diagonal, essentially forming a miter and are connected to each other in an articulated or detachable manner. At least one of the angled limbs is provided with a retaining element ( 11 ) having a cavity in the form of a recess, opening ( 10 ), or undercut. The continuation of the cavity of the retaining element ( 11 ) on the other angled limb located in the closed position is provided with a seat or guide ( 12 ) that extends around an exterior of the angled limb and a coupling element ( 13 ) is mounted in the receiving element or guide ( 12 ) and in the cavity in order to fix the two angled limbs ( 2, 3 ) to one another, thus blocking a relative motion or pivoting of the angled limbs ( 2, 3 ) relative to one another.

Description

The invention relates to an electrical angle-shaped connector, in particular with an electrical contacts having insulating body, which is arranged in the use position in a first angle leg of this connector, wherein one or more particular electrical lines also extend through a second angle leg to a consumer or to a power source and the two in the angular range abutting end faces of this angle leg obliquely and substantially mitred and -in particular in the region of an outer meridian - at least in use position are preferably articulated or releasably connected to each other and wherein in addition a the use position of the two angle leg fixing bracket is provided.

A comparable angular connector is off DE 200 03 976.8 U1 known and has proven itself. For mutual fixing of the two angle legs in their position of use, flanges or flange pieces are provided on these two angle legs, which can be secured to each other by a screw passing through them together and on a housing wall or a counterpart. This results in a determination of the two angle legs in their position of use to each other, however, a relatively large effort is required for this determination when closing the two angle legs. Above all, the sometimes several times to be performed screwing is to be regarded as time-consuming, especially if several screws are to be used.

Although is off DE 34 03 772 C2 and from DE 37 09 963 C1 each angled cable entry, so an angular connector, but without an insulating body with electrical contacts, known, the two angle legs are locked together in their position of use. The locking devices are attached to the angle leg itself. The mutual connection is therefore no longer possible if, for example, one of the locking projections is damaged or breaks off due to material fatigue or overstressing.

There is therefore the task of creating an electrical angle-shaped connector of the type defined, in which the assembly and in particular the acquisition of the use position and their fixation take less time and the risk that the mutual connection of the angle leg is unusable, is reduced.

To solve this problem, the initially defined connector is characterized in that at one of the angle leg at least one recess, namely a recess, opening or rejection having holder and in continuation of the recess of this holder at the located in the closed position other angle leg one on this outside extending receiving or guide are arranged and that for fixing the position of use of the two angle legs together on the receptacle or guide and in the recess a common coupling element, the mutual movement or pivoting of the angle leg blocking, attachable or hineinbewegbar or insertable or insertable.

It is therefore avoided that integrally connected with the angle leg locking elements or locking projections are required or that flanges are needed for insertion and attachment of screws. The angle legs need only be brought into their position of use, ie in the position in which their facing surfaces have their greatest closeness or touch, in order to be able to insert the coupling element into the corresponding receptacles, guides or recesses, which quickly and also easy to carry out.

In this case, the receptacle or guide may be an at least partially radially outwardly open recess, groove or groove. Therein, a corresponding shaped coupling element can be well kept against lateral displacements, although the recording may also be simply the outside of the corresponding angle leg, which then practically forms only one receiving position, the position of which is predetermined by the holder on the other angle leg. For a quick installation, however, it is helpful if this receptacle or guide is recessed and the coupling element accordingly already leads during insertion and determines form-fitting, especially in use position transverse to the plane spanned by him.

The holder arranged on the one angle leg can protrude with respect to its outer contour. In this way, it has a sufficiently large cross-section to have the recess can, in which the coupling element when gripping from the other angle leg can then be inserted easily.

A particularly good connection is obtained when two mirror-symmetrically arranged and formed brackets are provided on the one angle leg opposite to the longitudinal center opposite one another or symmetrically and which are provided on the another angle leg extending over a portion of the circumference receiving or guide continues into the recesses of both holders and when the coupling element has two legs that fit into the holder and its recesses. The coupling element can then embrace the one angle leg in the region of the receptacle or guide and be inserted with protruding legs in two brackets on the other angle legs and thereby set the position of use of the two angle legs. The assembly is very simple, because the coupling element can be practically inserted into the brackets with its two legs so that the connection of these legs comes into use position on the recording or guide to the system and thus prevents the two angle legs unfold.

It is particularly advantageous if the coupling element is approximately U-shaped and the free ends of the U-legs are inserted or engage in the recess of the brackets and if the U-cross bar as a counter support or abutment in the use position to that at the other angle leg arranged receptacle or guide, in particular in a recess or groove forming, fits and / or engages. Such a U-shaped coupling element can therefore be inserted well over the angle leg having the receptacle or guide, wherein its U-legs are then moved along this angle leg and finally protrude beyond it. This protruding or projecting portion can engage in the recess of the respective, lying in continuation of the recording or guide recess and holder and thereby cause the mutual fixing of the two angle legs.

Already due to their straight course prevent these U-legs the coupling element in the use position that the two angle legs can be pivoted relative to each other, because this would have to perform arcuate movements, which are blocked by the rectilinear U-legs.

An even better mutual connection and an improved positive connection can be achieved if the holder or holders has as a recess extending in the direction of extension of the U-legs of the coupling element, a closed cross-section having opening in its interior and / or at its end has a forming a delineation extension or mouth, and if the engaging in the opening of the holder U-legs at their located in the extension or behind the mouth of the opening area deformation, in particular a projection have, in the position of use in the extension or Trailing or behind the mouth of the opening locks.

The coupling element can thus be locked in its blocking position in this manner, so that it is also better kept and secured against unwanted loosening. In this case, the protrusions on the U-legs relative to the course of which can be moved from each other, so that they can, for example, when engaging behind the mouths of the recesses from this and can be brought by a skilled user by squeezing the two U-legs again in a release position.

The receptacle or guide can be arranged at least in the vicinity of the holder of the other angle leg portion of the first angle leg, which is partially wrapped by the coupling element in the use position, and this recording or guide can in particular a closed cross-section have, which at least partially corresponds to the recess or opening on the holder of the other angle leg. Continuing the closed region of the receptacle or guide, an outwardly open groove may extend to the other side of the angled limb and to the second closed or groove region.

In such a feature combination, the particular U-shaped coupling element can first be inserted through the closed opening on the first angle leg, which then passes in their continuation in the recesses or openings of the brackets on the second angle leg and then in particular after a lock both angle legs in their use position connects to each other and sets in this position of use.

It is expedient if the holder having a recess with respect to the outer contour of the supporting angle leg each protrudes. Thus, there is sufficient space for accommodating the recess without reducing the wall thickness of the angle leg or having to break through the wall of the angle leg in the region of the holder, which would possibly also be conceivable.

A modified embodiment of the connector according to the invention may provide that the holder or holders on the one angle leg as a recess has an outwardly open recess groove or has at its opposite end of the other angle leg end or recess or a sloping paragraph, said recess groove coaxial with the longitudinal central axis or approximately in the longitudinal center plane of the angle leg carrying it, and that on the other angle leg as an exception or guide an at least partially curved or arcuate groove - the contour of the cross section of the angle leg following - is arranged, which continues in the use position of the two angle leg in the recess groove, and that the coupling element at its end or at the ends of the U-legs inwardly or mutually facing locking lugs or spacers or projections which fit in the position of use in the recess or behind the shoulder of the recess groove.

While in the arrangement described above, the holder and its recess extending transversely to the longitudinal center plane of these brackets carrying angle leg, the holder can therefore be arranged approximately in this longitudinal center plane, that is, the particular U-shaped coupling element can in the various embodiments to each other by 90 ° be used offset when the two angle legs in turn form an angle of 90 ° with each other in the most common application in the use position.

The mirror-symmetrically provided at the one angle leg, at their ends recesses or shoulders having recessed grooves and the arcuately extending on the other angle leg groove may be provided in each case at cross-sectional thickening or projections of the angle leg. Thus, these grooves and recesses may have a sufficiently large depth to provide space for a correspondingly thick trained coupling element, which can be recessed therein or flush with the edges thereof, not to stand in the position of use.

The arcuate groove can at the one angle leg over half the circumference of this particular about one extending circular cross-section having angle leg and continue in a guide or the recess and / or the recess groove of the other angle leg.

But it is also possible that the cross section of the angle leg is circular, semicircular and / or polygonal, in particular rectangular or square and approximately coincident on two angle legs, in particular with matching dimensions, or different. Depending on the cross section of the angle legs, the coupling element is then correspondingly shaped in the area between its two U-legs in order to be able to encompass and overlap the angle leg with this area and preferably to contact it flatly.

The distance of the U-legs of the coupling element suitably corresponds approximately to the cross-sectional dimension or the diameter of the angle leg with the receptacle or guide at the location that touches the inside of the coupling element in the position of use. The U-legs of this coupling element then run parallel to each other and approximately tangentially from the point of the largest cross-sectional dimension of this angle leg from until they reach their position of use in the holder of the other angle leg and expediently there are also locked.

Especially when combining one or more of the features and measures described above results in an angular connector in which the two angle legs can be set in their position of use by a clip-on and preferably latchable coupling element, which is very simple and very fast and also allows loosening without having to carry out complicated screwing. Also, the danger is extremely low that Damage could lead to the mutual connection of the angle leg is no longer possible. Since such substantially U-shaped coupling elements can be made very inexpensive metal or plastic, not only the assembly, but the production cost is reduced accordingly.

Fig. 1

in schaubildlicher Darstellung einen Steckverbinder gemäß der Erfindung mit zwei relativ zueinander schwenkbaren Winkelschenkeln, deren einer an einer Gehäusetrennwand über einen Flansch angeschraubt ist und deren anderer eine Aufnahme oder Führung für ein noch nicht mit dieser Aufnahme oder Führung verbundenes Kupplungselement hat, das außerdem in an dem zuerst genannten Winkelschenkel angeordnete Halterungen passt,

Fig. 2

eine der Fig. 1 entsprechende Darstellung nach dem Verschwenken des oberen Winkelschenkels in seine Gebrauchsstellung, in der die beiden einander zugewandten, auf Gehrung geformten Stirnseiten dieser beiden Winkelschenkel ihre größte Nähe zueinander haben beziehungsweise aneinander liegenden, wobei das Kupplungselement in seiner Gebrauchsstellung ist und ein Verschwenken der Winkelschenkel in Öffnungsposition sperrt,

Fig. 3

eine etwa der Fig. 1 entsprechende Darstellung, wobei das Kupplungselement und die dafür vorgesehenen Aufnahmen und Halterungen gegenüber denen gemäß Fig. 1 und 2 um 90° verdreht angeordnet sind, wobei die Winkelschenkel noch nicht in ihrer Schließstellung sind, sowie

Fig. 4

eine der Fig. 3 entsprechende Darstellung, bei welcher sich die beiden Winkelschenkel in ihrer Schließstellung befinden und durch ein Kupplungselement festgelegt sind.

Hereinafter, embodiments of the invention are described in more detail with reference to the drawing. It shows in partly schematized representation:

Fig. 1

in perspective view of a connector according to the invention with two relatively pivotable angle legs, one of which is screwed to a housing partition via a flange and the other has a receptacle or guide for a not yet associated with this recording or guide coupling element, which also in on the first mentioned angle leg arranged mounts fits,

Fig. 2

one of the Fig. 1 corresponding representation after the pivoting of the upper angle leg in its position of use, in which the two facing mitred ends of these two angle legs have their closest proximity to each other or adjacent to each other, wherein the coupling element is in its position of use and locks pivoting the angle leg in the open position .

Fig. 3

one about the Fig. 1 corresponding representation, wherein the coupling element and the designated Mounts and brackets opposite those according to Fig. 1 and 2 are arranged rotated by 90 °, the angle legs are not yet in its closed position, as well

Fig. 4

one of the Fig. 3 corresponding representation in which the two angle legs are in their closed position and are fixed by a coupling element.

In the description of the two embodiments obtained in their function matching parts even with a modified shape matching reference numerals.

A generally designated 1 electrical angle connector may include in a first angle leg 2 in a manner not shown an insulating body with electrical contacts, of which one or more lines can also extend through a second angle leg 3 to a consumer or to a power source. The two abutting in the angular range end faces 2 a and 3 a of these angle legs 2 and 3 are formed obliquely and substantially mitred and arranged in both embodiments and hinged or releasably connected to each other in the region of an outer meridian line, wherein at the angle leg 2 a flange 4 and on the Angle leg 3 two spaced apart, parallel flange pieces 5 are provided which comprise the flange 4 on both sides, and wherein a hinge pin 6 pivotally connects these flange pieces.

In addition, a the use position of the two angle legs 2 and 3 in still to be described way defining Mount provided.

The angle leg 3 is fastened by means of a flange 7 and screws 8 to a housing wall 9 or another counterpart.

At one of the angle leg is at least one recess, in the embodiment, an opening 10 or a breakthrough or a depression or a Hinterscheid having holder 11 and in continuation of this holder 11 and its recess or opening 10 at the other angle leg on this outside on its outer circumference extending recording or guide 12 is arranged. To fix the position of use of the two angle legs 2 and 3 together, a coupling element 13 is provided which engages on the one hand on the receptacle or guide 12 and on the other hand hineinbewegbar in the recess 16 or opening 10 or insertable or insertable, that is attachable to the bracket 11 and in this holding position according to the Fig. 2 or 4 the mutual movement or pivoting of the angle legs 2 and 3 locks.

In this case, the receptacle or guide 12 is in accordance with the embodiment Fig. 1 and 2 on the angle leg 2 and the holder 11 with the opening 10 on the angle leg 3, while in the embodiment according to 3 and 4 the receptacle or guide 12 is arranged on the angle leg 3 and accordingly the cooperating holder 11 is supported by the angle leg 2.

In both embodiments, the receptacle or guide 12 is a partially radially outwardly open recess, groove or groove, which is particularly well in Fig. 1 and 3 recognizes.

In this groove, the coupling element 13 can be inserted in a manner to be described, at the same time parts of the coupling element 13 then reach into the region of the holder 11 and thereby blocks the mutual movement of the angle leg 2.

It can be seen further in both embodiments, that the arranged on the one angle leg bracket 11 protrudes from the outer contour to allow enough space for an opening 10 or recess groove 16 with sufficient radial depth.

In both embodiments, it is also provided that two mirror-symmetrically arranged and formed brackets 11 are provided at the one angle leg opposite to its longitudinal center and the symmetrically opposite the angle leg over a portion of its circumference receiving or guide 12 into the recesses or Openings of both brackets 11 continues. The coupling element 13 has in both embodiments, two legs 14 which fit into the holder 11 and the recesses 16 or openings 10, that is, the coupling element is approximately U-shaped. The free ends of the U-legs 14 are thus inserted into the recesses or openings 10 of the brackets 11 and inserted and engage in the use position in this one. The U-crosspiece of the overall U-shaped coupling element 13 fits as a counter support or abutment in the use position to the arranged on the other angle leg receptacle or guide 12 and engages in a receiving or guide 12 forming recess or groove or in the position of use Fig. 2 and 4 in this guide groove 12 a.

In the embodiment according to Fig. 1 and 2 have the holders 11 as a recess respectively in the insertion direction of the U-leg 14 of the coupling element 13 extending, a closed cross-section having opening 10, in its interior or, as in Fig. 2 recognizable, at its end has a formation forming a distinction or mouth. The engaging in the opening 10 of the brackets 11 U-legs 14 have at its located behind the mouth of the opening 10 in the use position a deformation, namely a projection 15 which engages in the use position behind the mouth of the opening 10, as shown in FIG Fig. 2 is shown. At this projection 15, the U-legs 14 against their restoring force could also be pushed back and thus pushed out of the opening 10 and the holder 11 when the angle leg 2 is to be unfolded relative to the angle leg 3 again. The projections 15 of the two U-legs 14 are directed away from each other outwards and are located in the plane spanned by the coupling element 13 plane.

The receptacle or guide 12 is arranged in the bracket 11 of the angle leg 3 near the region of the angle leg 2, which is partially wrapped in the position of use of the coupling element 13. In this case, this receptacle or guide 12 near the holder 11 also has a closed cross-section which corresponds approximately to that of the opening 10 on the holder 11. In continuation of the closed area of the receptacle or guide 12 then runs as part of this guide 12 an outwardly open groove to the other side of the angle leg 2 and the second area with a closed opening, that is the in Fig. 1 and 2 recognizable arrangement is present on the opposite side of the angle leg 2 mirror-symmetrically in the same way. Thus obtained the U-legs 14 of the coupling element 13 even on the angle leg 2 an all-round leadership and are completely enclosed on two angle legs 2 and 3.

Both in the embodiment according to Fig. 1 and 2 as well as in the embodiment 3 and 4 stand the brackets 11 relative to the outer contour or surface of the respective supporting angle leg 3 or 2, as can be clearly seen in the drawings.

In the embodiment according to 3 and 4 have the brackets 11 on the angle leg 2 as a recess in each case an outwardly open Aussparungsnut 16, but could also in this case a closed in its cross-section opening 10 analogous to the Fig. 1 and 2 be provided, as vice versa in the embodiment according to Fig. 1 and 2 instead of a closed opening 10, a recess groove 16 could be arranged on the holder 11.

The recess groove 16 has at its end opposite to the other angle leg 3 end or a recess 17 which could also be formed as a sloping paragraph, said recess groove 16 is coaxial with the longitudinal central axis and approximately in the longitudinal center plane of the angle leg 2 having it. At the other angle leg 3 as a recording or guide 12 in this case a partially curved or according to the cross-sectional contour of this angle leg 3 arcuate groove - the outline of the cross section of this elbow 3 following - arranged in the position of use of the two angle legs 2 and 3 according to Fig. 4 continues in the recess groove 16. The coupling element 13 has in this case at its ends of its U-legs 14 inwardly and mutually facing locking lugs or spacers 15, the in Use position in the recess 17 or behind a paragraph at the end of Aussparungsnut 16 fit and engage there, which in turn form-fit and yet releasable connection are created.

You can see in the 3 and 4 clearly that the mirror-symmetrically provided on the one angle leg 2, at their ends recesses 17 or paragraphs having recess grooves 16 and the arcuately extending on the other angle leg 3 guide groove 12 are each provided at cross-sectional thickening or projections of the angle leg. The corresponding cross-sectional thickening of the angle leg 2 is in this embodiment, the holder 11th

In both embodiments, the arcuately arranged guide groove 12 extends at the respective angle leg over its half circumference, wherein this has a circular or semicircular cross-section in both embodiments. It then continues into a guide or the recess or the recess groove of the other angle leg.

It should be noted that the cross section of the angle legs 2 and 3 - as in both embodiments - circular or semicircular but divergent from polygonal, in particular rectangular or square and approximately coincident on two angle legs, especially with matching dimensions, or could be different , For example, one angle leg could have a circular and the other a square cross section. But it could also be both square legs square or rectangular. Further combinations are conceivable.

The distance between the U-legs 14 of the coupling element 13 corresponds in all these cases about the cross-sectional dimension or the diameter of the angle leg with the receptacle or guide 12 at the location that touches the inside of the coupling element 13 in the position of use. The U-legs 14 of the coupling element 13 thus go from the arcuate region about tangentially in a straight course over how to do it particularly well in the Fig. 1 and 3 recognizes. Likewise, they can extend tangentially from the receptacle or guide 12 having angle leg from the other angle leg and fasten there together with the holder 11, the position of use of the two angle legs together.

The angle-shaped connector 1 has an insulating body containing electrical contacts, which is arranged in a first angle leg 2, wherein one or more electrical lines also extend through a second angle leg 3 and the two abutting in the angular range end faces 2a, 3a of this angle leg 2, 3 obliquely and are arranged substantially mitred and hinged or detachably connected to each other: At one of. Angle leg is at least one a recess, namely a recess, opening 10 or rearrangement having support 11 and in continuation of the recess of this holder 11 located at the other angle leg located in the closed position on this outside extending recording or guide 12 and arranged for fixing the two angle legs 2, 3 to each other is on the receptacle or guide 12 and in the recess a common coupling element 13, the mutual movement or pivoting of the angle leg 2, 3 blocking, attachable.

Claims (15)

1. Electrical angular connector (1), particularly having an insulating member comprising electrical contacts which is disposed in a first angle arm (2) of this connector in the position of use, one or more particularly electrical leads also running through a second angle arm (3) to a consuming appliance or to a current source, and the two end faces (2a, 3a) of these angle arms (2, 3) that abut on one another in the angle region being arranged in an inclined position and essentially mitred, and - particularly in the region of an outer meridian line - being jointed or releasably connected to one another at least in the position of use, and wherein, moreover, a clamp is provided that secures the position of use of the two angle arms (2, 3), characterised in that on one of the angle arms is provided at least one clamp (11) having a recess, namely a depression, opening (10) or undercut, and as a continuation of the recess in this clamp (11), on the other angle arm that is in the closed position there is a receptacle or guide (12) extending on the outside of the clamp, and in order to fix the position of use of the two angle arms (2, 3) with one another, a common coupling element (13) that locks the angle arms (2, 3) against movement or pivoting relative to one another can be mounted on or moved into or pushed into or inserted in the receptacle or guide (12) and the recess.
2. Connector according to claim 1, characterised in that the receptacle or guide (12) is a recess, groove or channel that opens radially outwards at least in parts.
3. Connector according to claim 1 or 2, characterised in that the clamp (11) mounted on one of the angle arms projects relative to the outer contour thereof.
4. Connector according to one of claims 1 to 3, characterised in that two mirror-symmetrically arranged and constructed clamps (11) are provided on one of the angle arms, opposite one another or symmetrically relative to the central longitudinal line, and the receptacle or guide (12) extending along the other angle arm over part of its circumference continues into the recesses of both clamps (11), and the coupling element (13) has two legs (14) that fit into the clamp (11) and its recesses.
5. Connector according to one of claims 1 to 4, characterised in that the coupling element (13) is substantially U-shaped and the free ends of the legs (14) of the U can be inserted in or engage in the recess (10) in the clamps (11), and in the position of use the crosspiece of the U, as a counter-clamp or abutment, fits and/or engages in the receptacle or guide (12) provided on the other angle arm, particularly in a recess or groove that forms it.
6. Connector according to one of claims 1 to 5, characterised in that the clamp or clamps (11) has or have, as a recess, an opening (10) of closed cross section extending in the direction of insertion of the legs (14) of the U of the coupling element (13), said opening having inside it and/or at its end a widened portion or mouth that forms an undercut, and in that the legs (14) of the U engaging in the opening (10) in the clamp (11) have, on their region located on the widened portion or behind the mouth of the opening (10), a deformation, particularly a projection (15), which in the position of use latches into the widened portion or undercut or behind the mouth of the opening (10).
7. Connector according to one of claims 1 to 6, characterised in that the receptacle or guide (12) is arranged at least in the area of the angle arm (2) close to the clamp (11) of the other angle arm (3) that is partly surrounded by the coupling element (13), and in that this receptacle or guide (12) has, in particular, a closed cross-section that corresponds to the opening (10) on the clamp (11) of the other angle arm, at least in parts.
8. Connector according to one of claims 1 to 7, characterised in that in a continuation of the closed area of the receptacle or guide (12), an outwardly open groove runs to the other side of the angle arm (2) and to the second area with a closed opening or groove.
9. Connector according to one of claims 1 to 8, characterised in that the clamp (11) having a recess projects relative to the outer contour of the angle arm that carries it.
10. Connector according to one of claims 1 to 9, characterised in that the clamp or clamps (11) on one angle arm (2) comprise(s) as the recess an outwardly open recess groove (16) that has, at its end region or end opposite the other angle arm (3), a depression (17) or a downward step, this recess groove (16) extending coaxially to the central longitudinal axis or substantially along the central longitudinal plane of the angle arm (2), and in that on the other angle arm (3) is provided, as the receptacle or guide (12), a groove that is curved or arcuate at least in parts - following the outline of the cross section of the angle arm (3) - which continues into the recess groove (16) in the position of use of the two angle arms (2, 3), and in that the coupling element (13) has, at its end, inwardly directed latching lugs or widened portions (15) which fit into the recess (17) or behind the step of the recess groove (16) in the position of use.
11. Connector according to one of claims 1 to 10, characterised in that the recess grooves (16) provided in mirror-symmetrical arrangement on one angle arm (2) and comprising depressions (17) or steps at their ends, and the groove (12) extending in an arc on the other angle arm (3) are each provided on cross-sectional thickened portions or projections of the angle arms.
12. Connector according to one of claims 1 to 11, characterised in that the groove (12) extending in an arc on one angle arm extends over half the periphery of this angle arm, which is, in particular, circular in cross section, and continues into a guide or the recess and/or the recess groove in the other angle arm.
13. Connector according to one of claims 1 to 12, characterised in that the cross section of the angle arms (2, 3) is circular, semicircular and/or polygonal, particularly rectangular or square and roughly the same on both angle arms, particularly with the same dimensions, or different.
14. Connector according to one of claims 1 to 13, characterised in that the spacing of the legs (14) of the U of the coupling element (13) corresponds roughly to the cross-sectional dimension or diameter of the angle arm with the receptacle or guide (12) at the point that makes contact with the inside of the coupling element (13) in the position of use.
15. Connector according to one of the preceding claims, characterised in that the projections (15) provided on the legs (14) of the U are directed outwards away from one another or inwards towards each other.

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