Clamping collet with a matching seal for improved cable fixation

Abstract

The present invention relates to a cable plug connector 1 configured for providing a mechanically lockable plug connection with a built-in plug connector matched to the cable plug connector 1 as a counterpart, wherein the cable plug connector 1 comprises a plug body 2, wherein the plug body 2 comprises a coupling portion 3, an insertion opening 4, and a thread 5. The cable plug connector 1 further comprises a clamping collet 6 comprising at least two clamping teeth 7, wherein the clamping collet 6 is arranged in the insertion opening 4 of the plug body 2, a seal 8 arranged within a cavity 9 of the clamping collet 6, wherein the seal 8 comprises a seal cavity 10, and a bushing 11, wherein the bushing 11 is configured such that - in a state screwed onto the thread 5 of the plug body 2 - the bushing 11 presses on the at least two clamping teeth 7 of the clamping collet 6. Each of the at least two clamping teeth 7 of the clamping collet 6 comprises a cable contact portion 12 and a seal contact portion 13.

Description

FIELD OF THE INVENTION

[0001] The present invention relates to a cable plug connector with an improved clamping collet and a matching seal.BACKGROUND OF THE INVENTION

[0002] Cable plug connectors in which the cable is fixed within the cable plug connector by means of a clamping collet and a matching seal are known from the prior art.

[0003] For example, the publication CN 213212483 U discloses a cable plug connector in which the clamping collet is configured as a hollow cylinder, wherein a seal, also configured as a hollow cylinder, is arranged in the cavity of the clamping collet. Both the clamping collet and the seal have a through-going cavity, wherein these two parts are arranged relative to each other in such a way that the two cavities form a cable passage through which a cable can be inserted into the plug body of the cable plug connector.

[0004] The clamping collet has several clamping teeth that are arranged radially around the cavity of the clamping collet so that, when the cable plug connector is assembled, a bushing presses these clamping teeth onto the seal arranged in the cavity of the clamping collet. This seal is compressed by the pressure exerted by the clamping teeth, which narrows the diameter of the seal cavity in such a way that the seal contacts the cable sheath of the cable passing through the cable passage. In this way, the cable is fixed inside the cable plug connector against tension on the cable and the interior of the plug body is sealed against moisture, which could penetrate along the cable in the interior of the plug body and cause damage or a short circuit.

[0005] However, prior art clamping collets have the disadvantage that the cable can only be held in the cable plug connector when tensile forces of up to a few kilograms act on the cable. At higher tensile forces, the cable is torn away from the contacts despite the present clamping collet, which can lead to an interruption in signal transmission and / or damage to the cable plug connector. If a power cable is torn out, there is also the risk of an electric shock for people standing nearby.

[0006] Prior Art cable plug connectors that attempt to increase the clamping strength of the clamping collet, e.g. by increasing the size of the clamping teeth, in order to press the seal even more tightly against the cable, have other disadvantages. For example, increasing the pressure on the seal by increasing the size of the clamping teeth can cause the seal to deform, which can lead to leakage in the cable plug connector or, in the worst case, can cause damage to the cable.OBJECT OF THE INVENTION

[0007] It is therefore an object of the invention to provide a cable plug connector that overcomes the disadvantages of the state of the art.

[0008] It is a further object of the invention to provide a cable plug connector which enables fixing the cable within the cable plug connector at higher tensile forces acting on the cable, in particular without causing any damage to the cable and / or leakage against moisture in the cable plug connector.

[0009] It is a further object of the invention to provide a cable plug connector with an improved clamping collet and in particular a seal matched to this clamping collet.

[0010] These objects are achieved by realizing at least part of the features of the independent claims. Features which further develop the invention in an alternative or advantageous manner are described in the dependent patent claims.SUMMARY OF THE INVENTION

[0011] The present invention relates to a cable plug connector configured for providing a mechanically lockable plug connection with a built-in plug connector matched to the cable plug connector as a counterpart. The cable plug connector comprises a plug body, wherein the plug body comprises a coupling portion, wherein the coupling portion is provided to be inserted into an opening of the built-in plug connector to provide the plug connection, and an insertion opening, wherein the insertion opening is located at an end of the plug body opposite the coupling portion, and a thread, wherein the thread is arranged on an outer wall of the plug body and (radially) surrounds the insertion opening.

[0012] The inventive cable plug connector further comprises a clamping collet (in other words, e.g. collet chuck) comprising at least two clamping teeth (in other words, e.g. clamping jaws, clamping wings or clamping arms), wherein the clamping collet is arranged in the insertion opening of the plug body, and a seal arranged within a cavity (in other words, e.g. hollow space or passage) of the clamping collet, wherein the seal comprises a seal cavity. The inventive cable plug connector further comprises a bushing, wherein the bushing is configured such that - in a state screwed onto the thread of the plug body - the bushing presses / pushes / hits on the at least two clamping teeth of the clamping collet. Each of the at least two clamping teeth of the clamping collet comprises a cable contact portion and a seal contact portion.

[0013] The insertion opening is preferably provided for inserting the clamping collet together with the (matched) seal accommodated therein into the interior of the plug body. The cable plug connector according to the invention is preferably configured such that the clamping collet together with the seal received in the cavity of the clamping collet can only be inserted through the insertion opening into the interior of the plug body to such an extent that the clamping collet is present at least with a respective part of its clamping teeth within the insertion opening. This can be achieved, for example, by a stop for the clamping collet and / or the seal, which is provided by a contact element carrier already inserted into the interior of the plug body through the insertion opening. This ensures that the bushing screwed onto the thread of the plug body can simply press on the clamping teeth of the clamping collet to provide the clamping mechanism described in detail below for fixing a cable inserted into the interior of the plug body.

[0014] Due to the fact that the clamping teeth of the clamping collet of the cable plug connector according to the invention are configured not only with a seal contact portion, which is provided to press the seal onto the cable respectively the cable sheath of the cable, but also with a cable contact portion, which is provided to press directly onto the cable respectively the cable sheath of the cable, a fixing of the cable within the cable plug connector is provided even at higher tensile forces acting on the cable in a direction opposite to the direction in which the cable is inserted into the cable plug connector.

[0015] One reason for this is that the clamping area in which the clamping collet exerts a clamping force on the cable is significantly larger than that of the clamping collets of the prior art. For example, a clamping force is exerted on the cable not only in an area in which the seal is pressed onto the cable by the seal contact portion of the clamping teeth, but also in an area in which the cable contact portion presses directly onto the cable.

[0016] The distribution of the clamping force over a larger clamping area / surface has the further advantage that the clamping force provided by the clamping collet can be increased overall without the cable being bent / pinched off, for example.

[0017] Since the clamping collet of the cable plug connector according to the invention also comprises the seal contact portion, which presses the seal onto the cable or the cable sheath of the cable, the clamping collet also provides the desired tightness against moisture in the cable plug connector in addition to the improved fixation of the cable against tension described above.

[0018] Optionally, the clamping collet can be arranged in the insertion opening of the plug body such that the at least two clamping teeth of the clamping collet protrude out of / protrude from the plug body. In this way, pressing on the clamping teeth is facilitated by, for example, an inner edge of the bushing. If the clamping collet is arranged in the insertion opening of the plug body such that the at least two clamping teeth of the clamping collet do not protrude out of the plug body, an inner edge of the bushing would have to extend into the insertion opening when the bushing is screwed onto the thread of the plug body in order to be able to exert pressure on the clamping teeth.

[0019] In an exemplary embodiment of the cable plug connector according to the invention, the clamping collet and the seal can be arranged coaxially to each other, so that the cavity of the clamping collet and the seal cavity provide a cable passage (in other words, e.g. cable channel or cable duct). Since the clamping collet and thus also the seal arranged in the cavity of the clamping collet are arranged in the insertion opening, the cable can be inserted into the interior of the plug body through the cable passage.

[0020] Optionally, - if the bushing presses on the at least two clamping teeth of the clamping collet and if a cable is passed through the cable passage - the respective cable contact portion of the at least two clamping teeth can be pressed on the cable passed through the cable passage so that the cable is blocked with respect to a movement along the cable passage, and the respective seal contact portion of the at least two clamping teeth can be pressed on the seal so that the seal is contacted with the cable passed through the cable passage.

[0021] In a further exemplary embodiment of the cable plug connector according to the invention, each of the at least two clamping teeth can extend from an annular portion of the clamping collet in axial direction of a center axis / middle axis, in particular a longitudinal axis, of the clamping collet with a connecting portion parallel to the center axis of the clamping collet. Optionally, the annular portion of the clamping collet and the respective connecting portion of the at least two clamping teeth can provide a cylindrical part of the clamping collet.

[0022] In a further exemplary embodiment of the cable plug connector according to the invention, the respective seal contact portion of the at least two clamping teeth can be arranged at the respective connecting portion, and / or the respective cable contact portion of the at least two clamping teeth can be arranged at the respective seal contact portion.

[0023] In a further exemplary embodiment of the cable plug connector according to the invention, the respective seal contact portion of the at least two clamping teeth can be arranged at / attached to the respective connecting portion and the respective cable contact portion of the at least two clamping teeth can be arranged at the respective seal contact portion such that the respective seal contact portion and the respective cable contact portion of the at least two clamping teeth can provide a conically tapered part of the clamping collet.

[0024] In other words, the clamping collet can comprise a conically tapered part, wherein the conically tapered part of the clamping collet can comprise the respective cable contact portion and the respective seal contact portion of the at least two clamping teeth. In other words, the conically tapered part of the clamping collet is provided by a respective part of the at least two clamping teeth that comprises the cable contact portion and the seal contact portion.

[0025] Optionally, the bushing can be configured such that - in a state screwed onto the thread of the plug body - the bushing presses on the conically tapered part of the clamping collet so that the clamping collet and the seal arranged in the cavity of the clamping collet can be pressed towards an interior of the plug body.

[0026] In a further embodiment of the cable plug connector according to the invention, the seal can comprise a conically tapered part.

[0027] In a further embodiment, the seal can be arranged in the cavity of the clamping collet such that the conically tapered part of the seal can rest against the respective seal contact portion of the at least two clamping teeth. Optionally, the respective cable contact portion of the at least two clamping teeth can be arranged at the respective seal contact portion such that a region of the seal surrounding an opening of the seal cavity can rest against a stop provided by the respective cable contact part of the at least two clamping teeth.

[0028] Optionally, - if the bushing presses on the at least two clamping teeth of the clamping collet - the respective seal contact portion of the at least two clamping teeth can be pressed on the conically tapered part of the seal.

[0029] Since the conical part of the seal is shaped such that it fits exactly against the conical part of the clamping collet, which is provided by the respective seal contact portion and the respective cable contact portion of the at least two clamping teeth, the clamping force exerted by the clamping teeth is distributed over the entire conical surface of the seal. This means that the clamping force is not applied to a small area of the seal as in the prior art, which prevents the cable from being pinched off as described above. This effect of uniform distribution of the clamping force is enhanced if the conically tapered part of the seal and the conically tapered part of the clamping collet are elongated, in other words if the cone angle is reduced.

[0030] In a further embodiment, the cable passage can be provided by the seal cavity and the respective cable contact portion of the at least two clamping teeth.

[0031] In a further embodiment, the seal cavity can comprise a first sealing lip, wherein the first sealing lip can extend into the cable passage. Optionally, - if the bushing presses on the at least two clamping teeth of the clamping collet and if a cable is passed through the cable passage - the respective seal contact portion of the at least two clamping teeth can be pressed on the seal so that the first sealing lip is contacted with the cable passed through the cable passage. This can improve the sealing effect of the seal against moisture, for example, which could penetrate into the plug body through the cable passage along the cable.

[0032] In a further embodiment, the respective cable contact portion of the at least two clamping teeth can comprise a plurality of grooves. This further improves the clamping and adhesive effect of the cable contact portion.

[0033] In a further embodiment, the cable plug connector can further comprise a contact element carrier, wherein the contact element carrier can be arranged in an interior of the plug body, can comprise a cable insertion opening, and can be provided to accommodate a contact element, wherein the contact element can be provided to contact a contact element counterpart on the built-in plug connector side by entering the plug connection and thus to provide signal transmission over the plug connection.

[0034] In a further embodiment, the seal can contact the contact element carrier with an end of the seal directed towards the interior of the plug body and the clamping collet can contact the contact element carrier with an end of the clamping collet directed towards the interior of the plug body, in particular wherein a cable can be insertable through the cable passage into the cable insertion opening of the contact element carrier.

[0035] In a further embodiment, the contact element carrier can comprise a sealing structure surrounding the cable insertion opening, the sealing structure of the contact element carrier can be configured as an elevation, wherein the elevation of the contact element carrier can engage in a recess of the seal, wherein the recess of the seal can be provided by a pressure of the elevation of the contact element carrier on a plane contact surface of the seal, or can be pre-installed in the seal, or a recess, wherein a second sealing lip of the seal, which can be arranged at the end of the seal directed towards the interior of the plug body and can surround the seal cavity, can engage in the recess of the contact element carrier. In this way, the interior of the cable plug connector, in particular the interior of the plug body, can additionally be sealed against moisture. The interaction of the clamping collet and seal thus prevents moisture from penetrating into the interior of the cable plug connector along the cable and the interaction of the seal with the contact element carrier prevents moisture from penetrating into the interior of the cable plug connector past the contact point / contact area of the seal and the contact element carrier.

[0036] In a further embodiment, the bushing can be configured such that - in a state screwed onto the thread of the plug body - the bushing can press on the conically tapered part of the clamping collet so that the seal arranged in the cavity of the clamping collet is pressed towards the sealing structure of the contact element carrier. In this way, the clamping collet and the seal are pressed onto the contact element carrier, thereby increasing the previously described sealing of the interior of the cable plug connector with respect to the contact point / contact area of the seal and the contact element carrier.

[0037] In a further embodiment, the contact element carrier can be configured such that - if a corresponding contact element is accommodated by the contact element carrier - the cable plug connector can comprise one of the following cable plug connector types: a three-pole power plug connector type (for example, a powerCON plug from the company Neutrik AG from Liechtenstein), SPE, USB-C, IEC, XLR, RJ45, HDMI, USB, or RCA. The inventive cable plug connector is advantageously configured in such a way that the cable fixing and sealing effect provided by the clamping collet and seal is independent of the specific configuration / design of the contact element carrier respectively the contact elements mounted therein. In this way, the inventive cable plug connector can be used for different connector types.

[0038] In a further embodiment, the clamping collet can comprise four to sixteen clamping teeth, in particular eight clamping teeth, wherein the four to sixteen clamping teeth can be arranged radially around a center axis, in particular a longitudinal axis, of the clamping collet. In this way, the clamping effect exerted by the clamping collet can be evenly distributed over several clamping teeth, in particular over several seal contact portions and cable contact portions. One of the advantages of this is that it prevents damage to the seal and / or the cable due to the clamping force acting too strongly on a specific point of the cable. Furthermore, due to the increased number of clamping teeth and thus also an increased number of seal contact portions and cable contact portions, the seal is pressed uniformly / evenly against the sheath of the cable, which additionally prevents leakage caused by deformation of the seal.

[0039] In a further embodiment, the clamping collet can comprise between every two - when viewed in the axial direction of the center axis of the clamping collet - radially adjacent / neighboring clamping teeth a separating gap / slit, wherein every two - when viewed in the axial direction of the center axis of the clamping collet - diametrical separating gaps can comprise the same gap size / gap width. In addition to the advantages described above with regard to the distribution of the clamping force over several clamping teeth, this embodiment also has the further advantage that the clamping teeth can be moved flexibly by means of the separating gaps, thus preventing the clamping teeth from breaking off due to the pressure exerted by the bushing. This advantage of increased flexibility is particularly apparent when the respective separating gap not only extends between the seal contact portions and the cable contact portions of two clamping teeth, but also extend between the connecting portions of these two clamping teeth up to the annular portion of the clamping collet.

[0040] In a further embodiment - if the bushing presses on the at least two clamping teeth of the clamping collet and if a cable is passed through the cable passage - the respective seal contact portion of the at least two clamping teeth can be pressed on the seal so that the seal can be contacted with the cable passed through the cable passage in a watertight and / or airtight manner. Depending on the configuration of the clamping collet and the corresponding seal, the cable plug connector can be sealed in such a way that it fulfills the requirements of protection class IP65, IP66 and / or IP67.

[0041] In a further embodiment, the cable plug connector can further comprise a mechanical retaining element, wherein the mechanical retaining element can be configured to provide a locking mechanism in that a locking part of the mechanical retaining element can engage in a retaining element counterpart of the built-in plug connector and can be blocked with respect to an axial movement in a cable plug connector extraction direction. In this embodiment, the cable plug connector according to the invention can be locked in the plugged-in state in a built-in plug connector / chassis socket configured as a counterpart in such a way that the contact elements of the cable plug connector are in contact with the contact element counterparts of the built-in plug connector and, in addition, accidental removal of the cable plug connector is prevented.

[0042] In a further embodiment, the locking part- seen from the coupling portion in axial direction of a longitudinal axis of the cable plug connector - can be configured obliquely ascending, wherein the locking part can be configured such that during insertion of the coupling portion into the opening of the built-in plug connector, an edge of the opening of the built-in plug connector can slide along the obliquely ascending locking part, so that the locking part and thus also the mechanical retaining element can be lowered into a receiving cavity of the plug body.

[0043] In a further embodiment, the mechanical retaining element can be configured such that when the locking part of the mechanical retaining element has reached the retaining element counterpart of the built-in plug connector, the locking part and thus also the mechanical retaining element can rise from the receiving cavity of the plug body such that the locking part of the mechanical retaining element can engage in the retaining element counterpart of the built-in plug connector to provide the locking mechanism.

[0044] These embodiments have the advantage that the mechanically lockable plug connection between cable plug connector and built-in plug connector can be provided very easily.

[0045] In a further embodiment, the cavity of the clamping collet can extend between a first and a second clamping collet opening within the clamping collet, the seal cavity can extend between a first and a second seal opening within the seal, and the clamping collet and the seal can be arranged such that the first and second clamping collet opening and the first and second seal opening - seen in axial direction of a center axis of the cable plug connector - comprise a concentric arrangement with respect to each other. This makes it very easy to pass the cable through the arrangement of the cable collet and seal and insert it into the interior of the plug body

[0046] In a further embodiment, the interior of the plug body can extend from the coupling portion - in axial direction of a center axis of the cable plug connector - to the insertion opening within the plug body.

[0047] In a further embodiment, the conically tapered part of the clamping collet can be configured such that the conically tapered part of the clamping collet can comprise a cone angle in the range of 40 to 80 degrees, in particular 60 degrees. This embodiment has the advantage that the clamping force exerted on the cable is distributed over a larger area and and is still sufficiently high to hold the cable effectively. In addition, the bushing can effectively press on the conically tapered part of the clamping collet at said cone angle.

[0048] In a further embodiment, the conically tapered part of the seal can be configured such that the conically tapered part of the seal can comprise a cone angle in the range of 40 to 80 degrees, in particular 60 degrees. This embodiment has the advantage that the sealing surface of the seal with the cable is extended, but the clamping force is still sufficiently high.

[0049] In a further embodiment, - if the bushing presses on the at least two clamping teeth of the clamping collet and if a cable is passed through the cable passage - the respective seal contact portion of the at least two clamping teeth can be pressed on the seal so that the seal can be contacted with the cable passed through the cable passage such that a contact area between the seal and the cable can be sealed against a water jet with a pressure in the range from 100 bar to 300 bar, in particular 200 bar. This allows a device into which the cable plug connector according to the invention is plugged to be cleaned with a high-pressure jet without water being able to enter the device through the cable plug connector. This is particularly advantageous if a bushing was used to assemble the cable plug connector which is permeable to the high-pressure water jet.

[0050] In a further embodiment, by combination of pressure exerted by the respective cable contact portion of the at least two clamping teeth on the cable passed through the cable passage and the contacting of the seal with the cable passed through the cable passage, the cable can be blockable with respect to movement along the cable passage with tensile forces acting on the cable in the range from 6 kg to 30 kg, in particular in the range from 12 kg to 20 kg. This embodiment reduces the probability of a disruption of a signal transmission as well as damage to the cable plug connector or the device in which the cable plug connector is plugged in due to the cable being torn out. This in turn protects surrounding persons.BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The invention is illustrated in more detail below, purely by way of example, with reference to working examples shown schematically in the drawing. Identical elements are labelled with the same reference numerals in the figures. The described embodiments are generally not shown true to scale and they are also not to be interpreted as limiting the invention. Specifically, Fig. 1: shows a schematic illustration of a longitudinal section through the cable plug connector according to the invention; Fig. 2: shows a schematic illustration of a side view of the arrangement of clamping collet, seal and contact element carrier of the cable plug connector according to the invention; Fig. 3: shows a schematic illustration of an arrangement of clamping collet, seal and contact element carrier of the cable plug connector according to the invention when viewed along the center axis of the clamping collet; Fig. 4: shows an exploded view of the cable plug connector according to the invention. DETAILED DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 shows a schematic illustration of a longitudinal section through an exemplary embodiment of the cable plug connector 1 according to the invention. Figure 1 illustrates in particular the arrangement of the clamping collet 6 and the seal 8 arranged in the cavity 9 of the clamping collet 6 in the interior 27 of the plug body 2. In the exemplary arrangement shown, the contact element carrier 26 was first inserted into the interior 27 of the plug body 2 through the insertion opening 4 up to a stop provided for the contact element carrier 26 in the interior 27 of the plug body 2. The contact element carrier 26 thus forms a stop for the clamping collet 6 and the seal 8. The clamping collet 6 contacts the contact element carrier 26 with its end 30 directed into the interior 27 of the plug body 2 and the seal 8 contacts the contact element carrier 26 with its end 29 directed into the interior 27 of the plug body 2 in such a way that the clamping collet 6 and thus also the seal 8 arranged in the cavity 9 of the clamping collet 6 are arranged / positioned within the insertion opening 4.

[0053] The clamping collet 6 and the seal 8 are arranged in the insertion opening 4 in such a way that the conically tapered part 19 of the clamping collet 6, which is formed by the arrangement of the respective seal contact portions 13 on the corresponding connecting portions 17 of the clamping teeth 7 and the arrangement of the respective cable contact portions 12 on the corresponding seal contact portions 13 of the clamping teeth 7, protrudes from the insertion opening 4 and thus from the plug body 2. The cylindrical part 18 of the clamping collet 6 is formed by the annular ring 15 (not shown here) and the connecting portions 17. The cable contact portions 12 of the clamping teeth 7 each have several grooves 25 and thus also corresponding projections (formed here as serrations / prongs / teeth), which contribute to an additional improvement in the clamping effect of the cable contact portions 12.

[0054] The seal 8 is adapted to the cavity 9 of the clamping collet 6 and arranged in the cavity 9 in such a way that the cone 20 of the seal 8 rests against the seal contact portions 13 of the clamping teeth 7. Furthermore, the seal 8 rests with the region 21 surrounding the opening 22 of the seal cavity 10 against the stops 23 formed by the cable contact portions 12. The seal 8 is arranged in the cavity 9 of the clamping collet 6 in such a way that the seal cavity 10 extending through the seal 8 in the axial direction of the center axis 16 of the clamping collet 6 and the cavity 9 of the clamping collet 6 extending through the claping collet 6 in the axial direction of the center axis 16 of the clamping collet 6 form a cable passage 14. In particular, the cable passage 14 is formed by the seal cavity 10 and the cable contact portions 12 of the clamping teeth 7. The seal 8 is arranged coaxially to the clamping collet 6, whereby the center axis 16 of the clamping collet 6 also corresponds to the center axis of the seal 8. The seal cavity 10 and thus the cable passage 14 also runs in the axial direction of the center axis 16 of the clamping collet 6. The clamping collet is arranged coaxially to the plug body 2 and thus also coaxially to the cable plug connector 1.

[0055] The clamping collet 6 is arranged in the interior 27 of the plug body 2 in such a way that a cable can be inserted into the interior 27 of the plug body 2 in the axial direction of the axis 16 of the clamping collet 6. Furthermore, the clamping collet 6 and the seal 8 are arranged on the contact element carrier 26 in such a way that the cable can be inserted through the cable passage 14 into the contact element carrier opening 28. The cable can thus be connected to contact elements 36 arranged in the contact element carrier 26.

[0056] The bushing 11 is screwed onto the thread 5 arranged on the outside of the plug body 2 and radially surrounding the insertion opening 4. The bushing has a radially circumferential edge 35 in an interior space, which presses on the conically tapered part 19 of the clamping collet 6 formed by the seal contact portions 13 and cable contact portions 12 of the clamping teeth 7.

[0057] The clamping teeth are radially compressed in such a way that the width 34 of the separating gaps 33 between the clamping teeth 7 is reduced until the cable contact portions 12 of the clamping teeth 7 press against the sheath of a cable passing through the cable passage 14.

[0058] Furthermore, the radial compression of the clamping teeth 7 also presses the respective seal contact portion 13 onto the conically tapered part 20 of the seal (illustrated by the arrows A), whereby the diameter of the seal cavity 10 is reduced, at least in the conically tapered part 20, until the inner wall of the seal cavity 10 is in contact with the cable passed through the cable passage 14. In this way, the contact area of the seal 8 and the cable passed through the cable passage 14, in particular the contact area of the inner wall of the seal cavity 10 and the cable passed through the cable passage 14, can be sealed, especially against moisture.

[0059] The pressure exerted by the bushing on the seal contact portions 13 and / or cable contact portions 12 radially compresses the clamping teeth 7 in such a way that the connecting portions 17 of the clamping teeth 7 are also deformed towards the axis 16. Thus, in the embodiment shown, the connecting portions 17 of the clamping teeth 7 are also pressed onto the seal 8, whereby the pressure exerted by the connecting portions 17 also contributes to the compression of the seal 8 and thus to the cable fixing mechanism and sealing mechanism described above. However, this contribution to the compression of the seal 8 is significantly lower compared to the compression of the seal 8 caused by the contact between the seal contact portions 13 and the conically tapered part 20 of the seal 8.

[0060] Due to the combined pressure of the seal contact portions 13 and the cable contact portions 12 of the clamping teeth 7 on the cable, the cable can be blocked with respect to a movement along the cable passage 14 with tensile forces acting on the cable in the range from 6 kg to 30 kg, in particular in the range from 12 kg to 20 kg.

[0061] For additional sealing of the contact area of seal 8 and cable, the seal cavity 10 has two sealing lips 24, which are also pressed onto the cable sheath by the pressure exerted by the seal contact portions 13 in the course of reducing the diameter of the seal cavity 10.

[0062] The pressure of the stop 35 of the bushing on the cone 19 presses the clamping collet 6 and thus also the seal 8 arranged in the cavity 9 in the direction of the interior 27 of the plug body 2 and thus onto the contact element carrier 26 arranged in the interior 27. The seal 8 is thereby pressed onto the elevation 31 of the contact element carrier 26 surrounding the opening 28 of the contact element carrier 26 in such a way that the elevation 31 engages in the depression 32 formed by the pressure of the elevation 31 on the seal 8. In this way, the contact area of contact element carrier 26 and seal 8 is additionally sealed against moisture.

[0063] Figure 2 shows a schematic illustration of a side view of the arrangement of clamping collet 6, seal 8 and contact element carrier 26 of the cable plug connector 1 according to the invention. As can be seen from Figure 2, in the embodiment shown, clamping collet 6, seal 8 and contact element carrier 26 are arranged coaxially to one another, with the center axis 16 representing the common axis for all three components.

[0064] The clamping teeth 7 are arranged on the annular ring 15 radially surrounding the axis 16, with the connecting portions 17 of the clamping teeth 7 extending (at least substantially) parallel to the axis 16 starting from the annular portion 15. The annular portion 15 and the connecting portions 17 thus form the cylindrical part 18 of the clamping collet 6. The conical part 19 of the clamping collet 6 is formed by the seal contact portions 13 arranged on the connecting portions 17 and the cable contact portions 12 arranged on the seal contact portions 13.

[0065] The seal 8 is matched to the shape of the cavity 9 of the clamping collet 6 defined by the shape of the clamping teeth 7, whereby the cone 20 of the seal 8 rests against the seal contact portions 13 of the clamping teeth 7 when the seal 8 is inserted into the cavity 9. Each of the cable contact portions 12 forms an additional stop 23 for the seal 8. Between the clamping teeth 7 are separating gaps 33, which extend from the annular ring 15 over the entire length of the clamping teeth 7. This configuration of the gaps 33 enables, on the one hand, the radial compression of the clamping teeth 7 towards the axis 16, which leads to a reduction in the width 34 of the gaps 33, and, on the other hand, sufficient mobility of the clamping teeth 7. Due to this mobility of the clamping teeth 7, the probability of the clamping teeth 7 being damaged by the pressure of the bushing 11 (e.g. in the form of so-called stress whitening) is reduced.

[0066] Figure 3 shows a schematic illustration of an arrangement of clamping collet 6, seal 8 and contact element carrier 26 of the cable plug connector 1 according to the invention when viewed along the center axis 16 of the clamping collet 6.

[0067] The clamping teeth 7 are arranged radially distributed around the axis 16 on the ring 15. If the bushing 11, in particular the circular stop 35 of the bushing 11, exerts pressure on the conical part 19 of the clamping collet 6, which is formed by the seal contact portions 13 and cable contact portions 12, and if a cable is passed through the cable passage 14, the clamping teeth 7 are pressed towards / against the axis 16 until the serrations of the cable contact portions 12, formed in particular by the grooves 25, press on the sheath of the cable passed through. Furthermore, the movement of the clamping teeth 7 towards the axis 16 presses the seal contact portions 13 onto the conically tapered part 20 of the seal 8, reducing the diameter of the seal cavity 10 until the inside of the seal cavity 10 is in contact with the cable passing through.

[0068] It is also shown that the diametrically opposite gaps 33 have the same gap size 34, whereby two of the eight gaps 33 are wider than the remaining six gaps 33. These wider gaps 33 serve to accommodate a respective hooking element of the contact element carrier 26, whereby the clamping collet 6 can be fastened to the contact element carrier 26 in addition to the pressure exerted by the bushing 11. The fact that the clamping teeth 7 are pressed in the direction of the axis 16 reduces the gap size 34 of the gaps 33.

[0069] The separation gaps 33 respectively the clamping teeth 7 are distributed radially evenly around the axis 16 in order to ensure uniform compression of the seal 8 by the seal contact portions 13 and uniform pressure on the cable by the cable contact portions 12.

[0070] Figure 4 shows an exploded view of the cable plug connector 1 according to the invention. In addition to the previously described components of the shown exemplary embodiment of the cable plug 1, namely the plug body 2, the contact element carrier 26, the seal 8, the clamping collet 6 and the bushing 11, Figure 4 also shows the mechanical retaining element 37, which is attached inside the receiving cavity 39 of the plug body 2 by means of the clip-on ring 40. If the coupling portion 3 of the plug body 2 is inserted into an opening of a built-in plug connector, the locking part 38 of the mechanical retaining element 37 engages in a recess of the built-in plug connector, mechanically locking the plug connection between the cable plug connector 1 and the built-in plug connector.

[0071] Furthermore, the shown exemplary embodiment of the cable plug 1 comprises the contact element 36, which is arranged at the contact element carrier 26 when the cable plug 1 is assembled, whereby the contact element 36 is designed as a contact element for an RJ-45 plug. However, the cable plug 1 can also be converted to a different type of plug by making minor modifications to the cable plug 1, for example to the interior 27 of the plug body 2, the coupling portion 3 and the contact element carrier 26.

[0072] Although the invention is illustrated above, partly with reference to some preferred embodiments, it must be understood that numerous modifications and combinations of different features of the embodiments can be made. All of these modifications lie within the scope of the appended claims.

Claims

1. Cable plug connector (1) configured for providing a mechanically lockable plug connection with a built-in plug connector matched to the cable plug connector (1) as a counterpart, wherein the cable plug connector (1) comprises: • a plug body (2), wherein the plug body (2) comprises ∘ a coupling portion (3), wherein the coupling portion (3) is provided to be inserted into an opening of the built-in plug connector to provide the plug connection, ∘ an insertion opening (4), wherein the insertion opening (4) is located at an end of the plug body (2) opposite the coupling portion (3), and ∘ a thread (5), wherein the thread (5) is arranged on an outer wall of the plug body (2) and surrounds the insertion opening (4), • a clamping collet (6) comprising at least two clamping teeth (7), wherein the clamping collet (6) is arranged in the insertion opening (4) of the plug body (2), • a seal (8) arranged within a cavity (9) of the clamping collet (6), wherein the seal (8) comprises a seal cavity (10), and • a bushing (11), wherein the bushing (11) is configured such that - in a state screwed onto the thread (5) of the plug body (2) - the bushing (11) presses on the at least two clamping teeth (7) of the clamping collet (6), characterized in that each of the at least two clamping teeth (7) of the clamping collet (6) comprises a cable contact portion (12) and a seal contact portion (13).

2. Cable plug connector (1) according to claim 1, wherein the clamping collet (6) and the seal (8) are arranged coaxially to each other, so that the cavity (9) of the clamping collet (6) and the seal cavity (10) provide a cable passage (14), in particular wherein - if the bushing (11) presses on the at least two clamping teeth (7) of the clamping collet (6) and if a cable is passed through the cable passage (14) - • the respective cable contact portion (12) of the at least two clamping teeth (7) is pressed on the cable passed through the cable passage (14) so that the cable is blocked with respect to a movement along the cable passage (14), and • the respective seal contact portion (13) of the at least two clamping teeth (7) is pressed on the seal (8) so that the seal (8) is contacted with the cable passed through the cable passage (14).

3. Cable plug connector (1) according according to claim 1 or 2, wherein each of the at least two clamping teeth (7) extends from an annular portion (15) of the clamping collet (6) in axial direction of a center axis (16) of the clamping collet (6) with a connecting portion (17) parallel to the center axis (16) of the clamping collet (6), in particular wherein the annular portion (15) of the clamping collet (6) and the respective connecting portion (17) of the at least two clamping teeth (7) provide a cylindrical part (18) of the clamping collet (6).

4. Cable plug connector (1) according according to claim 3, wherein • the respective seal contact portion (13) of the at least two clamping teeth (7) is arranged at the respective connecting portion (17), and / or • the respective cable contact portion (12) of the at least two clamping teeth (7) is arranged at the respective seal contact portion (13).

5. Cable plug connector (1) according to claim 4, wherein the respective seal contact portion (13) of the at least two clamping teeth (7) is arranged at the respective connecting portion (17) and the respective cable contact portion (12) of the at least two clamping teeth (7) is arranged at the respective seal contact portion (13) such that the respective seal contact portion (13) and the respective cable contact portion (12) of the at least two clamping teeth (7) provide a conically tapered part (19) of the clamping collet (6).

6. Cable plug connector (1) according to one of the preceding claims, wherein the seal (8) comprises a conically tapered part (20).

7. Cable plug connector (1) according to claims 5 and 6, wherein the seal (8) is arranged in the cavity (9) of the clamping collet (6) such that the conically tapered part (20) of the seal (8) rests against the respective seal contact portion (13) of the at least two clamping teeth (7), in particular wherein the respective cable contact portion (12) of the at least two clamping teeth (7) is arranged at the respective seal contact portion (13) such that a region (21) of the seal (8) surrounding an opening (22) of the seal cavity (10) rests against a stop (23) provided by the respective cable contact part (12) of the at least two clamping teeth (7).

8. Cable plug connector (1) according to claim 2, wherein the cable passage (14) is provided by the seal cavity (10) and the respective cable contact portion (12) of the at least two clamping teeth (7).

9. Cable plug connector (1) according to claim 2, wherein the seal cavity (10) comprises a first sealing lip (24), wherein the first sealing lip (24) extends into the cable passage (14).

10. Cable plug connector (1) according to one of the preceding claims, wherein the respective cable contact portion (12) of the at least two clamping teeth (7) comprises a plurality of grooves (25).

11. Cable plug connector (1) according to one of the preceding claims, wherein the cable plug connector (1) further comprises a contact element carrier (26), wherein the contact element carrier (26) • is arranged in an interior (27) of the plug body (2), • comprises a cable insertion opening (28), and • is provided to accommodate a contact element (36), wherein the contact element (36) is provided to contact a contact element counterpart on the built-in plug connector side by entering the plug connection and thus to provide signal transmission over the plug connection.

12. Cable plug connector (1) according to claim 11, wherein the seal (8) contacts the contact element carrier (26) with an end (29) of the seal (8) directed towards the interior (27) of the plug body (2) and the clamping collet (6) contacts the contact element carrier (26) with an end (30) of the clamping collet (6) directed towards the interior (27) of the plug body (2), in particular wherein a cable is insertable through the cable passage (14) into the cable insertion opening (28) of the contact element carrier (26).

13. Cable plug connector (1) according to claim 12, wherein the contact element carrier (26) comprises a sealing structure (31) surrounding the cable insertion opening (28), the sealing structure (31) of the contact element carrier (26) being configured as • an elevation (31), wherein the elevation of the contact element carrier (26) engages in a recess (32) of the seal (8), wherein the recess (32) of the seal (8) ∘ is provided by a pressure of the elevation (31) of the contact element carrier (26) on a plane contact surface of the seal (8), or ∘ is pre-installed in the seal (8), or • a recess, wherein a second sealing lip of the seal (8), which is arranged at the end (29) of the seal (8) directed towards the interior (27) of the plug body (2) and surrounds the seal cavity (10), engages in the recess of the contact element carrier (26).

14. Cable plug connector (1) according to one of the preceding claims, wherein the clamping collet (6) comprises four to sixteen clamping teeth (7), in particular eight clamping teeth (7), wherein the four to sixteen clamping teeth (7) are arranged radially around a center axis (16) of the clamping collet (6).

15. Cable plug connector (1) according to claim 14, wherein the clamping collet (6) comprises between every two - when viewed in the axial direction of the center axis (16) of the clamping collet (6) - radially adjacent clamping teeth (7) a separating gap (33), wherein every two - when viewed in the axial direction of the center axis (16) of the clamping collet (6) - diametrical separating gaps (33) comprise the same gap size (34).

Images