EP1035619B1 - Electrical Connector - Google Patents

Abstract

The plug (1) consists of at least one body (5) with an axial drill hole (4), at whose first end (3) a cable (6) is inserted. The cable is connectable with contact elements (7) arranged at the second end (2) of the plug body. The first end is associated with a pull-relief arrangement (10) comprising at least two clamping elements (8, 9) stored adjustable for clamping the cable. The plug body comprises at least two slider guides (11,12) proceeding in direction of the axial drill hole, in which the clamping elements are led adjustable.

Description

The invention relates to a plug from at least one having an axial bore Plug body, a cable can be inserted into the plug body at its first end and at the second end of the plug body with electrical contact elements arranged there is connectable. The first end of the connector body is at least one two adjustable clamping elements for clamping the cable Strain relief device assigned.

Such a connector is known from US-A-5167527. With the known plug the strain relief device is formed by three ring segments as clamping elements which are connected to each other by screws for mutual approximation. at Approach of the ring segments reduces a free space formed between them for clamping a cable that is passed through the free space. The ring segments are slidably mounted on one side of one end of the plug body and are assembled by one screwed onto the connector body Cover covered. Between one end of this cover and the Ring segments is also an annular element arranged when screwing the cover is compressed onto the connector body and towards a cable whose seal is pressed. The cable extends through an axial hole in the Plug body up to the contact elements with which it is in a known manner connected is.

The strain relief device of the known connector is different on cables Diameter easily adaptable and safely prevent a direct Tensile stress on the connection between cable and electrical contact elements.

From US-A-3739318 a connector is known in which two clamping elements by means of screws Transversely mounted to an axial bore receiving a cable are. The clamping elements each have laterally projecting projections, which in one slot-shaped receptacle in the connector housing. Otherwise they are Clamping elements unguided and arranged at a free end of the plug. Between the two clamping elements is still one from the connector housing to the free one Arranged at the end of the projecting flange through which the corresponding screws - are passed through. The clamping elements are only in contact with each other up to this flange approachable.

With regard to the previously known connector, the object of the application is the task on the basis, while maintaining the advantages described above, the strain relief device and thus the connector even easier and cheaper to build up and at the same time improve the accessibility to the strain relief device.

This task is in connection with the features of the preamble of the claim 1 solved in that in the connector body at least two in the direction of Axial bore and slide guides open to the outside are formed, in which the Clamping elements are guided.

In this way, the clamping elements are slidably mounted directly in the plug body and not at one of its ends. Furthermore, the clamping elements are by the externally open slide guides are accessible and can be clamped in this way of the cable can be adjusted. Such sliding guides can be done in a simple manner formed by openings running radially inwards in a wall of the plug body his. Side walls of these openings can be used to guide the clamping elements serve. Such openings or sliding guides are simple and inexpensive produced. The function of the strain relief device is in no way restricted and an adaptation to different diameters of the cables and a it is possible to clamp the respective cable securely.

Usually a connector of the type described in the introduction, see also US-A-5167527, in several parts, the plug body having at least one provided with the contact elements Plug insert, a plug cap and a plug sleeve arranged between them having. Of these, at least the plug cap and plug sleeve can be relative are rotatable to each other. In such a multi-part connector easy accessibility of the strain relief device and the simple management of the to implement the corresponding clamping elements, the sliding guides can be installed directly in the Plug cap to be formed.

To secure the cable against tension immediately after it has been inserted into the axial bore, can the sliding guides adjacent to an insertion opening of the first end of the Plug cap to be arranged.

Around the clamping elements for adaptation to different diameters and for secure Keeping the cables simple can continue to be beneficial be considered that the sliding guides are transverse to the axial bore over the Insert opening in the form of an elongated hole and the clamping elements have a shape substantially complementary to the elongated hole. In this way the clamping elements are also guided on all sides in the elongated hole.

A favorable form for the clamping elements and accordingly for the complementary one Elongated hole can be seen in it when the clamping element essentially flat, transverse to the axial bore side surfaces and connecting their ends Has final curves. This results in an approximately elongated, oval one Cross section for such a clamping element.

The clamping elements can, for example, on their underside facing the cable have a cutting edge extending transversely to the cable. This will be when approaching of the clamping element pressed into the cable in its insulation and through the Using two opposite clamping elements, the cable is held on both sides and secured against train on the contact elements. However, about the surface contact to enlarge between the clamping element and the cable or its insulation, the underside of the clamping element facing the axial bore have a concave recess for at least partially receiving the cable.

Since the cables generally have a circular cross section, the Recess be substantially part-circular.

Around the cable not only between essentially smooth surfaces of the recesses to hold the recess on its cable-facing terminal side at least have a protruding protrusion toward the cable. This will when the two clamping elements come close to or even partially into the insulation of the Cable pressed in.

In a simple embodiment, the clamping projection can be in the axial direction extending terminal block be formed. Such a terminal block is not only used for improved retention of the cable, but at the same time also forms a certain rotation lock.

In order to prevent each other from loosening the clamping elements, or at least one of the clamping elements can fall out of the sliding guides automatically, can at least one clamping element, in particular from the clamping side in the axial direction have a side surface protruding outward stop, which with an inner edge of the insertion opening can be brought into contact. Moved this way this clamping element only radially outwards in the sliding guides until the Stop on the inner edge of the insertion opening. The other clamping element can also have such a stop, but can also completely from the Sliding guide can be removed. The stops can be arranged so that the insertion opening completely, at least when the stop against its inner edge is open.

In order to improve the guidance for the clamping elements in the sliding guides, from at least one side surface of such a clamping element a guide projection protrude outwards, which slidably engages in a corresponding guide groove, which extends in the direction of displacement of the clamping element.

This can improve the appearance of the plug and also a possible one Reduce the risk of injury by having one opposite the underside Outside of the clamping element has a substantially same radius of curvature like an outside of the plug cap. In this way, the clamping elements not with sharp edges over the sliding guide to the outside, but are depending on the diameter of the cable to be secured, these are flush or recessed arranged.

As stated above, the cable is already partially covered by the clamping elements held against rotation. However, twisting of the cable can be relative the electrical contact elements still take place in that, for example, the Plug cap is rotated relative to the connector body. This can be done in a simple way thereby preventing an anti-rotation projection from at least one clamping element protrudes essentially in the axial direction, which in different Rotational positions of the plug cap relative to the plug sleeve in the latter Engaging recesses. By engaging the anti-rotation protrusion and engagement recess is relative twisting of the plug cap relative to the connector sleeve or accidental loosening of both prevented.

In a simple embodiment for the engagement recess, this can be between walls extending radially outward relative to the axial bore his. The walls limit the rotation of the connector cap relative to the connector sleeve, by the anti-rotation projection in contact with one of the walls in the direction of rotation device.

To a variety of relative positions between the plug cap and plug sleeve A plurality of engagement recesses can enable simultaneous protection against rotation equally spaced in the circumferential direction of the connector sleeve his.

The connector sleeve can be used to easily connect the connector sleeve and connector cap have an end section which is at least partially provided with an external thread, onto which the plug cap can be screwed with an internally threaded section.

To make the anti-rotation protrusions simple and as short as possible to be able to, the engagement recesses of the connector sleeve directly afterwards be arranged at the end portion.

To also the recesses when screwing the plug cap onto the plug sleeve to cover, the plug cap can at least one of the recesses have receiving ring flange terminating on the internal thread section.

For easy access to the anti-rotation protrusion, especially from outside, an insertion opening can be arranged in the ring flange, through which the anti-rotation projection can be brought into engagement with a recess. From the outside can be used to loosen the plug cap of the anti-rotation protrusion via the insertion opening are brought out of engagement with the recess, so that subsequently the plug cap can be rotated relative to the plug sleeve. In this Context is again advantageous that not only the anti-rotation projection can be handled from the outside, but also the clamping elements according to the invention are adjustable from the outside to hold or loosen the cable.

If the walls delimiting the engagement recesses extend over the external thread of the end portion extending radially outward, it is in this context furthermore advantageous if the ring flange has an outer diameter larger than one Has outer diameter of the internal thread portion.

There are various exemplary embodiments for such an anti-rotation projection possible. For example, an anti-rotation protrusion is easy to manufacture, the arm-shaped protrudes from a clamping element and with its free arm end the insertion opening into a recess with the clamping elements fastened together intervenes. It is of course also possible to have a corresponding anti-rotation protrusion or anti-rotation arm on both clamping elements train.

To one in a simple manner and close to the outside of the plug cap Arrange anti-rotation arm, this can be in a first, the clamping element adjacent arm section obliquely outwards relative to the plug cap and in one then the second arm section diagonally downwards in the direction of the axial bore extend, in particular an obtuse angle between the two arm sections is formed. The second arm section protrudes through the insertion opening Inside of the plug cap and engages in an engagement recess.

In this context, it is also advantageous if the internal thread section is open on the outside, one that runs essentially in the direction of the first arm section Has ramp recess. This is at least partially the first arm section can be inserted when the clamping elements are fastened together. As a result, the anti-rotation arm stands less on the outside of the plug cap to the outside.

An easy way to mutual adjustability of the clamping elements and their attachment to each other can be seen in it when the clamping elements on their lateral ends holes for receiving especially screws for mutual Have attachment and adjustment. The screws can, for example already partially screwed into the clamping elements with the anti-rotation arm be and be inserted into the corresponding sliding guide. The other clamping element is in its sliding guide from falling out due to the abovementioned stop secured. The two can then be turned by turning the screws further Clamping elements are fastened together and brought closer together for clamping of the cable passed between them.

Arrange them sunk around the screws when the clamping elements are fastened together to be able to drill any hole at least in the clamping component from where the Screws are screwed in, a receiving bore section open towards the outside with an enlarged diameter to accommodate a screw head exhibit.

To screw the connector cap onto the connector sleeve and also a mutual one To simplify loosening, for example, the internal thread section can at least formed adjacent to the ring flange as a screwing aid with a hexagonal outer contour his. A wrench or the like can then be plugged onto this can be used as an aid for turning the screw cap.

To move each clamping element within the slide in the direction to restrict the other clamping element can be approximately in the middle of the insertion opening Protect projecting projections radially inwards within the sliding guide with which Ends of the undersides of the respective clamping element can be brought into contact.

To the clamping elements in this context at the same time as close to one Connecting small diameter cables can be an end recess at the end of the underside for at least partially receiving the projection be arranged.

When using the plug according to the invention in potentially explosive environments must also have a sealing element to seal the electrical connection provided between cables and electrical contact elements within the connector his. The plug also shows such a sealing element, for example US-A-5,167,527th In this context it should be noted that there are two ring elements are provided, between which the sealing element is held. Will the ring elements approximate each other by screwing the cover onto the connector body, where a ring element is supported on the strain relief device, so it will Sealing element compressed and in particular towards the cable to the sealing system pressed.

In order to simplify the design effort for arranging such a sealing element, can a seal seat for receiving the sealing element itself at the free end of the end section of the connector sleeve to the external thread. In this way the seal seat is not to be manufactured separately or to be arranged in the connector Component, but part of the connector sleeve.

A simple embodiment of such a sealing seat is characterized by this from that this at least through an opening edge of the axial bore in the end section is formed, on which the substantially annular sealing element with a Plant end is pending. When screwing on the plug cap, the sealing element can then be pressed against the outside of the cable for sealing.

To make the sealing element safer, especially when assembling or disassembling to hold the plug can from the opening edge towards the plug cap an adjustable ring chamber to accommodate the sealing element protrude. The sealing element is held in this annular chamber and prevents accidental Secured falling out.

To easily change the diameter of the annular chamber and thus pressing the sealing element against an outside of the cable for sealing purposes To enable a screw-on bevel can be formed within the plug cap be when screwing the connector cap onto the connector sleeve with the annular chamber comes into contact to reduce their diameter. A simple embodiment for such a screw-on bevel, there is a gradual change in the inner diameter reducing section within the axial bore of the plug cap. At the Screwing the connector cap onto the connector sleeve is achieved through this reduction in inner diameter gradually compress the annular chamber in the corresponding section and thereby pressed the sealing element against the cable.

An advantageous embodiment for an adjustable ring chamber in diameter with a simple construction can be seen, for example, in the fact that the annular chamber has a wall of a number of elastically deflectable slats, which protrude from the opening edge essentially in the axial direction. The free ends of the slats then come when screwing on the plug cap with the inside diameter reducing section in contact and are pressed radially inward.

To keep the sealing element improved and at the same time unscrew the connector cap To make it easier, the slats can extend from the opening edge to the inside run. It is also possible that the slats only on their radially outer Side have a bevel at least at the free end.

To further seal the connector sleeve and cable through the sealing element improve, the opening edge in the direction of the end of the sealing element have protruding sealing lip.

A simple exemplary embodiment of such a sealing lip can be found therein, for example see that this as a notch bordering the axial bore within the connector sleeve is trained.

In this context, an even better seal results, for example in that the sealing element one in a recess between the notch or Has sealing lip and lamella engaging sealing edge.

To easily adapt to different diameters of cables without complete Can enable replacement of the sealing element in a cost-effective manner the sealing element is formed at least in two parts from the sealing outer ring and the sealing inner ring his. The sealing outer ring can be used regardless of the cable used, while the sealing inner ring to adapt to different diameters different Cable is interchangeable.

In this context, the sealing inner ring can have an annular circumferential Have sealing flange as a sealing edge, which, as stated above, in the recess between Point notch or sealing lip and slats engages.

The sealing flange can project so far radially outwards that the sealing outer ring can be pushed onto the sealing inner ring at one end of the sealing inner ring until it contacts the sealing flange is.

For cost reasons, it is also possible that the outer and inner sealing rings are made of different Materials are made. For example, the outer seal ring be made of a cheaper material that only a minor part of the sealing function takes over. The sealing inner ring with all-round sealing flange serves for the actual Sealing and can be made of a higher quality material that is sure Seals the cable against the connector body and thus to the outside.

Regarding the anti-rotation protrusion or arm is also still to be regarded as cheap, if this is elastically deflectable, so that also Clamping elements that are not or only slightly detached from one another by deflecting the Anti-rotation arm to the outside a relative rotation between the plug cap and plug sleeve is possible.

At this point it should be noted that strain relief and anti-rotation protection according to the invention can be produced essentially independently of one another. For example the strain relief regardless of the position of the insertion opening to the engagement recess be produced by means of the strain relief device. Likewise, the anti-rotation device automatically even after the strain relief has been produced by intervention the free arm end made through the insertion opening in an engagement recess.

The various parts of the plug according to the invention are, for example, made of a plastic material such as glass fiber reinforced polyester, polyamide or the like manufactured.

In the following an advantageous embodiment of the invention based on the in the Drawing attached figures explained and described in more detail.

Figur 1

einen Längsschnitt durch ein Ausführungsbeispiel eines erfindungsgemäßen Steckers;

Figur 2

einen vergrößerten Teilausschnitt des Steckers nach Figur 1;

Figur 3

eine Draufsicht auf den Teilausschnitt nach Figur 1 ohne Steckerkappe;

Figur 4

eine der Darstellungen nach Figur 2 entsprechende Darstellung mit eingestecktem Kabel;

Figur 5

eine Seitenansicht eines Klemmelements, und

Figur 6

eine Draufsicht auf das Klemmelement nach Figur 5.

Show it:

Figure 1

a longitudinal section through an embodiment of a connector according to the invention;

Figure 2

an enlarged partial section of the connector of Figure 1;

Figure 3

a plan view of the partial section of Figure 1 without a plug cap;

Figure 4

one of the representations of Figure 2 corresponding representation with the cable inserted;

Figure 5

a side view of a clamping element, and

Figure 6

a plan view of the clamping element of Figure 5.

1 shows a longitudinal section through a connector 1 according to the invention. At its left end 2 in FIG. 1, this has a plug insert 13 in which electrical contact elements 7 are arranged. These are usually divided into one Socket inserted as a plug-in device for making an electrical contact. The plug 1 also has a plug sleeve 15 into which the plug insert 13 is at least partially inserted. At the left end of the connector sleeve 15, this can have a rotatable ring 75, which in the manner of a bayonet lock for fastening the plug 1 on the socket, not shown. To the connector sleeve 15 is followed by a plug cap 14, which has a further, right end 3 of the plug insert 13, plug sleeve 15 and plug cap 14 formed plug body 5.

The plug insert 13 is represented by a number of screws 76, one of which is shown is screwable with the plug sleeve. Between plug insert and plug sleeve a sealing ring 77 is arranged. One end of the plugged into the connector sleeve 15 Plug insert 13 can be closed by an end plate 78 by means of a screw 79. The end plate 78 has through holes for the introduction of electrical Conductor, which is connected to the electrical contact elements by means of tie-rod or roof truss screws 80 7 are connectable. The electrical conductors are part of an electrical one Cable 6, see for example Figure 4.

Radially outward, a stop 81 can protrude from the plug sleeve 15, which the Rotation of the bayonet catch 75 relative to the connector sleeve is limited.

An axial bore 4 is formed in the plug sleeve 15 and in the plug cap 14, through which the cable 6, see Figure 4, can be inserted into the connector 1 and up to the plug insert 13 can be passed. The axial bore 4 extends essentially in Axial direction 28. The connector sleeve 15 has an end portion 40 which leads to the inside the plug cap 14 can be inserted. The end section 40 is at least partially with provided with an external thread 39 on which the plug cap 14 with a corresponding Internal thread 82 can be screwed on. The internal thread is on the inside an internally threaded portion 41 of the plug cap 14. At the internal thread section 41 closes one radially inward and towards the first end 3 of the plug 1 extending screw slope 65, which when screwing on the plug cap 14 on the plug sleeve 15 with a free end of the end portion 14 in Device. This free end is through an annular chamber 64 as a sealing seat 59 formed in which a sealing element 60 is received. The annular chamber 64 is through a plurality of fins arranged along a circumferential direction of the end portion 40 66, see Figure 3, formed.

Furthermore, the sealing seat 59 comprises an opening edge 62 with which a sealing edge 69, see for example FIG. 4, of the sealing element 16 is in contact. The opening edge has a sealing lip 67 which is offset radially inward with respect to the lamellae, see for example Figure 2.

In Figure 1, the plug cap 14 is just as far on the connector sleeve 15 by means of an external thread 39 and internal thread 82 screwed that free ends of the slats 66th have come into contact with the screw-on slope 75.

Between the internal thread section 41 and the insertion opening 16 at the first end 3 of the Plug cap 14, slide guides 11 and 12 are arranged opposite one another. The sliding guides 11 and 12 are both in the direction of the axial bore 4 and Outside 50 of the plug cap 14 open. In each of the sliding guides 11, 12 Clamping element 8 or 9 inserted and slidably guided therein. The sliding guides 11, 12 have in a plane perpendicular to the drawing plane according to the figure 1 in the form of an elongated hole and extend on both sides over the insertion opening 16 beyond.

The two clamping elements 8, 9 arranged in the slide guides 11, 12 form one Strain relief device 10, see also Figure 4, by clamping the cable 6 and a tensile stress on the connection between cable 6 and electrical contact elements Prevent 7 in plug insert 13.

The clamping element 9 has bores 52 at its two lateral ends, into which Screws 83 of the other clamping element 8 for mutual attachment and Pinching the cable 6, see Figure 4, can be screwed in. From the upper clamping element 8 is an arm-shaped anti-rotation projection 36 in the direction of the plug sleeve 15 from. This engages with its free arm end 46 in an insertion opening 43 which in an annular flange projecting from the plug cap 14 in the direction of the plug sleeve 15 42 is formed. The ring flange 42 engages over the connector sleeve 15 and is radially towards spaced on the outside from the internal thread section 41 of the plug cap 14.

In the illustration according to FIG. 1, the free arm end 46 lies radially from the outside on one Wall 38, see also Figures 3 and 4, on both sides to an engagement recess 37 is arranged on the outer circumference of the plug sleeve 15.

The clamping elements 8, 9 are towards one another or from one another in the clamping direction 33 movable away. Between the clamping elements 8 and 9 and approximately in the middle of the insertion opening 16 have the sliding guides 11, 12 projecting projections inwards 57 on. Lateral ends of the clamping elements 8, 9 are in contact with these brought.

A ramp depression 51 is formed on an outer side 50 of the plug cap 15, in which the anti-rotation arm 36 in the most retracted position of the Clamping element 8 can be deposited. The inclination of the ramp recess 51 corresponds to substantially the inclination of the portion of the directly adjacent the clamping element 8 Anti-rotation arm 36, see also Figure 4.

In Figure 2, in particular the plug cap 14 is shown enlarged analogous to Figure 1. The same parts are the same in this figure as in the other figures Reference numerals and are only partially mentioned.

In FIG. 2 there is an engagement recess 37 between two adjacent walls 38 visible, in which the free arm end 46 of the anti-rotation arm 36 partially engages. The end section 40 of the plug sleeve 15 is inserted within the plug cap 14. This ends with the annular chamber 64, which is surrounded by a plurality of lamellae 66 is. The slats 66 extend parallel to the axial direction 28 in the direction of the insertion opening 16. In another embodiment, the slats 66 can be slightly inclined to run inwards towards each other, so that the sealing element 60 securely in the Annular chamber 64 is held.

The sealing element 60 is composed of an inner sealing ring 71 and an outer sealing ring 70 educated. The sealing outer ring is attached to the sealing inner ring and with a radial sealing edge 69 protruding outwards from the contact end 63 of the sealing inner ring 71 Investment. The sealing edge 69 has along its circumference in a between the sealing lip 67 and lamella 66 formed recess 68 engaging sealing nose, see also FIG. 4. A sealing insert 74 can also be inserted into the inner sealing ring 71, the one radially outwardly projecting edge opposite the sealing edge 69 having.

Regarding the clamping elements 8 and 9, it should also be noted that these are perpendicular to 2 have flat side surfaces 18, 19 extending according to FIG. the ends of which are connected to one another via end curves 21, 22, see FIG. 6. From the inner side surfaces 19 there are strip-shaped guide projections 31, which in corresponding grooves 32 of the slide guides 11, 12, see also Figure 1, engage and how they extend along the direction of displacement 33.

FIG. 3 is a top view of in particular the end section 40 of the connector sleeve 15 shown. In this end section 40, the walls 38 are arranged in a star shape protrude radially outward, see also Figure 1. Between the walls 38 are the Engagement recesses 37 formed. The walls 38 close with reduced Diameter of the external thread 39 to which the internal thread section 41 of the Plug cap 14, see also Figures 1, 2 and 4, can be screwed on. To the external thread 39 join the fins 66, which form the annular chamber 64, respectively limit. These slats 66 and the opening edge surrounded by them 62, see FIG. 2, form the sealing seat 59 for receiving the sealing element 60.

The slats 66 can be deflected elastically, see for example FIGS. 2 and 4, see above that they come in contact with the screw-in slope 65 in the direction of the axial bore 4 can be deflected, see in particular FIG. 4.

FIG. 4 shows a view similar to FIG. 2, in which case the connector cap 14 is further screwed onto the connector sleeve 15. It is also between the clamping elements 8, 9, the cable 6 is clamped.

The clamping element 8 has a part-circular recess 24 on its underside on, see also Figure 5, the corresponding concave recess in the clamping element 9 is opposite. In the middle of the recess 24 there is a clamping element 8 Terminal strip 27 arranged as a clamping projection 26. This extends in the axial direction 28. On the opposite clamping element 9 are two spaced apart Terminal strips 27 formed, offset on both sides to the terminal block 27 of the Clamping element 8 are arranged.

In the illustration according to FIG. 4, the screw-on bevel 65 presses through contact with Free ends of the slats 66 towards each other so that the sealing element 60 is also pressed in the direction of the cable 6. This gets the sealing element 60, see also FIGS. 1 and 2, with an insulation of the cable 6 in System and seals the between the end plate 78, see Figure 1 and sealing of Sealing element 60 and insulation of the cable 6 formed space hermetically opposite the environment.

The anti-rotation arm 36 is shown in a relaxed position in which it is in one of the engagement recesses 37 engages with its free arm end 46. The anti-rotation arm 36 has a first arm portion 47 and a second arm portion 48, between which an obtuse angle 49 is included. The first Arm section 47 extends from the clamping element 8 obliquely outwards in the direction Plug sleeve 15. The second arm section 43 runs obliquely inwards. The anti-rotation arm 36 can be deflected elastically.

For receiving the end section 40 with the radially outwardly projecting walls 38, the ring flange 42 has a diameter 44 larger than one in this area Diameter 45 of the internal thread section 41.

Outer sides 34 of the clamping elements 8, 9 run correspondingly to the outer side 50 of the Plug cap 14 obliquely outwards in the direction of the plug sleeve 15 and also have a radius of curvature corresponding to this outside with respect to the Axial direction 28 on. In the clamping position according to FIG. 4, they are in the clamping element 8 arranged screws 83 in the corresponding bores of the clamping element 9 screwed in to move the two clamping elements towards each other sufficiently and clamp the cable 6 between the clamping sides 25, see FIG. 5.

FIG. 5 shows a side view in the axial direction 28 of the clamping element 8. In particular, the part-circular recess 24 on the underside 23 of the clamping element 8 is visible. The terminal block 27 is in the center of this concave recess 24 arranged as a clamping projection 26. It should be noted again that the recess 24 of the clamping element 9 is designed accordingly, with the one shown here Embodiment two terminal strips 27 spaced and laterally offset are arranged to the terminal block according to Figure 5.

The holes 52, 53 are in the clamping element 8 to the side of the anti-rotation arm 36 arranged, see also the top view of the clamping element 8 of Figure 6. This have open receiving bore sections 54 toward the top of the clamping element 8 with a diameter of 55. This is larger than a diameter 56 of the remaining bores 52, 53. The diameter 55 of the receiving bore section 54 is sufficient large for holding a screw head, see for example Figures 1 and 2, the screws 83.

The recess 24 forms the clamping side 25 on the underside 23 of the clamping element 8, which at least partially insulates the cable 6.

FIG. 6 shows a top view of the clamping element 8 according to FIG. 5.

The oval elongated shape with the two holes 52 and 53 at its ends corresponds to or is complementary to the elongated hole shape of the slide guides 11, 12, so that the clamping element 8 is guided on all sides in the slide guides 11, 12. The End faces 17, 18 or their ends 19, 20 connecting end curves 21, 22 are each with corresponding surfaces or sides of the slide guides 11, 12 in Contact.

It should also be pointed out that on the underside 53 of the clamping elements 8, 9 whose lateral ends are arranged step-shaped end recesses 58, see figure 5, the clamping elements 8, 9 moving towards one another on both sides of the Contact projections 57, see Figures 1 and 2, are present. Furthermore, from at least a side faces 17, 18, in particular of the clamping element 9, a stop 29 protrude, see Figure 4, which can be brought into contact with an inner edge 30 of the insertion opening 16 is. Through this stop 29, or its contact with the inner edge 30, the clamping element 9 is held in the slide guide 12, with the illustrated Embodiment, the clamping element 8 does not have such a stop and can be pulled out completely from the slide guide 11.

Claims (44)

1. A plug (1) consisting of at least one plug body (5) having an axial bore (4), with a cable (6) being insertable into the plug body at the first end (3) of the plug body and being connectable to contact elements (7) arranged at the second end (2), wherein a strain relief means (10) is associated to the first end (3), said strain relief means having at least two clamping elements (8, 9) adjustably supported for clamping the cable (6),
   characterized in that
   at least two sliding guides (11, 12) open in the direction towards the axial bore (4) and towards the outside are formed in the plug body (5), with the clamping elements (8, 9) being displaceably guided in said sliding guides.
2. A plug as claimed in claim 1, wherein the plug body (5) comprises at least one plug inset (13) provided with the contact elements (7), a plug cap (14) and a plug sleeve (15) arranged between the plug inset and the plug cap,
   characterized in that
   the sliding guides (11, 12) are formed in the plug cap (14).
3. A plug as claimed in claim 1 or 2
   characterized in that
   the sliding guides (11, 12) are arranged adjacent to an insertion opening (16) at the first end (3) of the plug cap (14).
4. A plug as claimed in at least one of the preceding claims,
   characterized in that
   the sliding guides (11, 12) extend transversely to the axial bore (4) beyond the insertion opening (16) in the shape of a longitudinal hole, and the clamping elements (8, 9) have a shape substantially complementary to the longitudinal hole.
5. A plug as claimed in at least one of the preceding claims,
   characterized in that
   the clamping element (8, 9) comprises substantially planar side faces (17, 18) extending transversely to the axial bore (4), and comprise end curves (21, 22) connecting the ends (19, 20) of said side faces (17, 18).
6. A plug as claimed in at least one of the preceding claims,
   characterized in that
   a lower side (23) of the clamping element (8, 9) pointing towards the axial bore (4) has a concave recess (24) for at least partially accommodating the cable (6).
7. A plug as claimed in at least one of the preceding claims,
   characterized in that
   the recess (24) is substantially partially circular.
8. A plug as claimed in at least one of the preceding claims,
   characterized in that
   the recess (24) comprises at least one clamping projection (26) projecting in the direction of the cable on the recess' clamping side (25) pointing towards the cable (6).
9. A plug as claimed in at least one of the preceding claims,
   characterized in that
   the clamping projection (26) is formed as a clamping rail (27) extending in the axial direction. (28).
10. A plug as claimed in at least one of the preceding claims,
    characterized in that
    at least one clamping element (8, 9) has an abutment (29) projecting towards the outside in particular from the clamping side (25) in the axial direction (28) beyond the side face (17, 18), wherein the abutment can be brought into contact with an inner rim (30) of the insertion opening (16).
11. A plug as claimed in at least one of the preceding claims,
    characterized in that
    a guide projection (31) projects to the outside from at least one side face (17, 18), said guide projection displaceably engaging into a corresponding guide groove (32) which extends in the displacement direction (33) of the clamping element (8, 9).
12. A plug as claimed in at least one of the preceding claims,
    characterized in that
    an outer side (34) of the clamping element (8, 9) opposite to the lower side (23) substantially has the same radius of curvature as the outer side (35) of the plug cap (14).
13. A plug as claimed in at least one of the preceding claims,
    characterized in that
    a rotation prevention projection (36) projects substantially in the axial direction (28) from at least one clamping element (8, 9), said rotation prevention projection (36) engaging in different rotary positions of the plug cap (14) relative to the plug sleeve (15) into engagement recesses (37) formed at the plug sleeve.
14. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the engagement recess (37) is formed between walls (38) extending radially outwardly relative to the axial bore (4).
15. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the engagement recesses (37) are arranged equidistantly in the circumferential direction of the plug sleeve (15).
16. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the plug sleeve (15) has an end section (40) at least partially provided with an external thread (39), the plug cap (14) having an internal thread section (41) being screwable onto the end section (40).
17. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the engagement recesses (37) are arranged adjoining the end section (40).
18. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the plug cap (14) has an annular flange (42) at least accommodating the engagement recesses (37) adjoining the internal thread section (41).
19. A plug as claimed in at least one of the preceding claims,
    characterized in that
    an insertion opening (43) is arranged in the annular flange (42) through which a rotation preventing projection (36) can be brought into engagement with an engagement recess (37).
20. A plug as claimed in at least one of the preceding claims,
    characterized in that
    an outer diameter (44) of the annular flange (42) is larger than an outer diameter (45) of the internal thread section (41).
21. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the rotation preventing projection (36) projects in an arm-like manner from a clamping element (8, 9) and with its free arm end (46) engages through the insertion opening (43) into an engagement recess (37) at clamping elements (8, 9) fixed to one another.
22. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the rotation preventing arm (36) extends in a first arm section (47) adjacent to the clamping element (8, 9) transversely towards the outside relative to the plug cap (14) and by an adjoining second arm section (48) transversely downwards in the direction towards the axial bore (4), wherein in particular an obtuse angle (49) is formed between the arm sections (36, 47).
23. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the internal thread section (41) has on its outer side (50) a ramp recess (51) extending substantially in the direction towards the first arm section (47).
24. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the clamping elements (8, 9) comprise on their lateral ends (19, 20) bores (52, 53) for accommodating in particular screws for the mutual attachment.
25. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the bore (52, 53) comprises at least in one clamping element (8, 9) an accommodation bore section (54) open towards the outside (34) having an enlarged diameter (55) for accommodating a screw head.
26. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the internal thread section (41) is formed at least adjacent to the annular flange (42) as a screw aid having a hexagonal outer contour.
27. A plug as claimed in at least one of the preceding claims,
    characterized in that
    abutment projections (57) within the slide guides (11, 12) project radially inwardly approximately centrally to the insertion opening (16) which can be contacted with ends of the lower side (23).
28. A plug as claimed in at least one of the preceding claims,
    characterized in that
    an end recess (58) is arranged at the end of the lower side (23) for at least partially accommodating the abutment projection (57).
29. A plug as claimed in at least one of the preceding claims,
    characterized in that
    a sealing seat (59) for accommodating a sealing element (60) for sealing the cable (6) is connected as a free end (61) of the end section (40) of the plug sleeve (15) to the external thread (39).
30. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the sealing seat (59) is formed at least by an opening rim (62) of the axial bore (4) in the end section (40) at which the substantially annular sealing element abuts with its abutment end (63).
31. A plug as claimed in at least one of the preceding claims,
    characterized in that
    an annular chamber (64) of variable diameter for accommodating the sealing element (60) projects from the opening rim (62) in the direction towards the plug cap (14).
32. A plug cap as claimed in at least one of the preceding claims,
    characterized in that
    a screwing-on taper (65) is formed within the plug cap (14) which when screwing the plug cap (14) onto the plug sleeve (15) contacts the annular chamber (64) for reducing the diameter thereof.
33. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the annular chamber (64) comprises a wall of a plurality of resiliently deflectable lamellae (46) projecting from the opening rim (62) substantially in the axial direction (28).
34. A plug as claimed in claim 33
    characterized in that
    the lamellae (66) extend from the opening rim (62) in an inclined manner towards the inside.
35. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the opening rim (62) comprises a sealing lip (67) projecting in the direction towards the abutment end (63) of the sealing element (60).
36. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the sealing lip (67) is formed as a V-notch encompassing the axial bore (4) within the plug sleeve (15).
37. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the sealing element comprises a sealing rim (69) engaging into a recess (68) between the sealing lip (67) and the lamellae (66).
38. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the sealing element (60) is formed at least of two parts formed by an outer sealing ring (70) and an inner sealing ring (71).
39. A plug as claimed in claim 38,
    characterized in that
    the inner sealing ring (71) comprises an annularly extending sealing flange (72) as a sealing rim (69).
40. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the outer sealing ring can be slipped onto the inner sealing ring for abutment with the sealing flange (72) arranged on the one end (73) of the inner sealing ring (71).
41. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the outer sealing ring and the inner sealing ring (70, 71) are made of different materials.
42. A plug as claimed in at least one of the preceding claims,
    characterized in that
    the rotation preventing arm (36) is resiliently deflectable.
43. A plug as claimed in at least one of the preceding claims,
    characterized in that
    independent of the position of the insertion opening (43) in the annular flange (42) relative to the engagement recess (37) in the plug sleeve (15) a strain relief by the strain relief means (10) can be established.
44. A plug as claimed in at least one of the preceding claims,
    characterized in that
    a means preventing rotation can be established by engagement in particular of a rotation preventing projection (36) into an engagement recess (37) automatically after establishing the strain relief by the strain relief means (10).

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