Plug connector for connecting first fluid pipe to second fluid pipe

Abstract

The invention relates to a plug connector (1) for connecting a first fluid pipe (2) to a second fluid pipe (3), comprising an outer sleeve (5) and an inner sleeve (4) having two locking claws (6), which are in a preliminary position in an initial position of the outer sleeve (5) and in a locked position in a locked position of the outer sleeve (5), the outer sleeve (5) comprises a latching element (9), which has a first latching section (10), which is received between two adjacent latching claws (6), and two second latching sections (11), which are connected to the first latching section (10), the first latching section (10) comprising an actuation projection (12), which is connected to the first latching section (10), and the actuation projection (12) comprising a second latching section (11), which is connected to the second latching section (11), which is connected to the second latching section (11). The first inner sleeve end (4a) is provided with a first latching section (11), and the second latching sections (11) each comprise a latching projection (13) having a latching end face (13a) facing the first inner sleeve end (4a), and the locking claws (6) each comprise an actuating section (14) having a first stop end face (15a) and a second stop end face (16a), the latching end face (13a) bears against the second stop end face (16a) in the initial position of the outer sleeve (5), and the actuating projection (12) can be pushed out in the radial direction by means of the retaining section (8) when the first fluid pipe (2) is connected, and wherein the latching end face (13a) bears against the second stop end face (16a) in the initial position of the outer sleeve (5). The outer sleeve (5) is movable into a locking position, in which the latching end face (13a) rests against the first stop end face (15a), in such a way that the latching projection (13) can be released from the second stop end face (16a) and the outer sleeve (5) can be moved into the locking position, in which the latching end face (13a) rests against the first stop end face (15a).

Description

Technical Field

[0001] This invention relates to a plug connector for connecting a first fluid tube and a second fluid tube. The plug connector includes an inner sleeve and an outer sleeve surrounding the inner sleeve. The inner sleeve has an open first inner sleeve end and an open second inner sleeve end connected to the first inner sleeve end. The outer sleeve is movable relative to the inner sleeve between an initial position and a locked position. The inner sleeve has a first connecting section in the region of the first inner sleeve end for connecting the first fluid tube and a second connecting section in the region of the second inner sleeve end for connecting the second fluid tube. Furthermore, this invention relates to a plug connector structural assembly and an application of the plug connector. Background Technology

[0002] The type of plug connector is used in a wide variety of industrial applications to preferably seal two fluid conduits. This is typically done within the assembly process of a defined fluid guiding product. Depending on the specific application and the fluid used, the fluid conduit can be a substantially rigid tube or a flexible hose. However, the fluid conduit can also be integrated into the component. The fluid used can be a gaseous or liquid medium. Examples of gaseous media include (compressed) air or a defined process gas. Examples of liquid media include water, lubricating oil, coolant, refrigerant, etc.

[0003] During product assembly, it may be necessary to connect the first fluid tube or fluid interface of the component to be assembled to the corresponding fluid tube or fluid interface of an existing product. As production processes become increasingly efficient, process times during assembly are typically shortened. Consequently, the available time for each assembly step is decreasing. Therefore, in addition to high reliability, rapid connection of fluid tubes via plug-in connectors is desired. Typically, one side of the plug-in connector is directly connected to one of the two fluid tubes, and the other fluid tube is first connected to an insert sleeve. To connect the two tubes, the insert sleeve is usually decoupled from the plug-in connector at the end.

[0004] Such plug connectors are known, for example, by EP1955413B1, EP3286477B1 and EP3379129B1. Summary of the Invention

[0005] The objective of this invention is to overcome the shortcomings of the prior art and provide a plug-in connector that is simple to operate and can reliably and quickly connect and disconnect fluid tubes.

[0006] The task is solved by a plug connector according to claim 1. The plug connector according to the invention enables simple and ergonomic operation and allows for repeated use. The plug connector has a relatively simple construction and ensures high connection security through clearly identifiable states. Specifically, the outer sleeve can only be introduced into the locking position when the connection is correctly established. Another advantage is that the first fluid tube can be rotated in the connected state. The opening mechanism of the locking claw allows for easy insertion and, particularly, easy disengagement of the first fluid tube with minimal insertion force.

[0007] Preferably, the outer sleeve is movable between the initial position and the locked position along the longitudinal direction of the inner sleeve. This simplifies operation because there is no need to rotate the outer sleeve.

[0008] Preferably, the locking claws each have a free first claw end and an opposing second claw end, with the first inner sleeve end positioned on the first claw end and the second claw end connected to the inner sleeve. The first claw end is radially movable relative to the second claw end between the preparatory posture and the locking posture. Each locking claw has a circumferential groove on its inner circumferential surface, located between the first claw end and the second claw end. The circumferential groove is configured to form-fit the holding section of the first fluid tube in the locking posture of the locking claw. This one-piece construction simplifies manufacturing and allows for improved holding of the fluid tube via the holding groove.

[0009] Preferably, the at least one locking element is disposed on the inner circumferential surface of the outer sleeve and has a free first locking element end and an opposing second locking element end. The first locking element end faces the end of the first inner sleeve, and the second locking element end is connected to the inner circumferential surface of the outer sleeve. The first locking element end is movable radially relative to the second locking element end. This allows the outer sleeve to be constructed integrally, thereby simplifying manufacturing.

[0010] Preferably, the actuating protrusion includes a first actuating ramp on the end of the first locking element, the first actuating ramp being configured to engage with a retaining section of the first fluid tube when the first fluid tube is inserted into the end of the first inner sleeve to extrude the actuating protrusion, and / or the actuating protrusion includes a second actuating ramp on the side facing the end of the second locking element, the second actuating ramp being configured to engage with a retaining section of the first fluid tube when the first fluid tube is removed from the end of the first inner sleeve to extrude the actuating protrusion. This simplifies the connection or disconnection of the fluid tube.

[0011] Advantageously, the first locking section is centrally located between the two second locking sections in the circumferential direction and includes the end of the first locking element. The operating protrusion is located on the first locking section in the region of the end of the first locking element, and the locking protrusions of the second locking sections are respectively located in the longitudinal direction between the operating protrusion and the end of the second locking element. This construction is structurally simple and has proven effective in actual tests.

[0012] Preferably, in the initial position of the outer sleeve, the first inner sleeve end of the inner sleeve protrudes beyond the first outer sleeve end of the outer sleeve. This allows the locking claws to be relatively widened radially, thereby simplifying the insertion of the fluid tube.

[0013] Preferably, at least three, and particularly preferably at least four, locking claws are provided, and / or at least two locking elements are provided. A larger number of locking claws and locking elements simplifies connection and disengagement and improves retention.

[0014] Preferably, the operating sections of the locking pawl each include a sliding surface, the sliding surface connecting the first stop end face and the second stop end face, and the sliding surface includes a blocking surface inclined towards the end of the first pawl. The blocking surface prevents accidental disengagement of the lock. Disengagement only occurs when the operating force is sufficiently large.

[0015] Preferably, the inner sleeve is made of plastic, the locking claw is integrally formed with the inner sleeve, and the end of the first claw is elastically bendable between the locked position and the ready position. Alternatively or additionally, the outer sleeve may be made of plastic, the at least one locking element is integrally formed with the outer sleeve, and the end of the first locking element is elastically bendable in the radial direction relative to the end of the second locking element. Thus, the plug-in connector can be manufactured simply and cost-effectively and can achieve flexible shapes.

[0016] Preferably, the outer sleeve is movable relative to the inner sleeve from the locked position through the initial position to the disengaged position. The first locking sections of the at least one locking element each include a first wedge surface on its circumferentially opposite sides, the first wedge surface tapering towards the end of the second inner sleeve. The locking claws accommodating the first locking sections each include a second wedge surface on their circumferentially facing sides, the second wedge surface tapering towards the end of the second inner sleeve. The first wedge surface is configured to engage with the second wedge surface when the outer sleeve moves from the initial position to the disengaged position, so as to open the locking claws from the preparatory posture to a release posture, in which the locking of the first fluid tube, particularly the shape-locking housing of the retaining section in the circumferential groove, can be completely disengaged. This simplifies the operation of the connector when disengaging the fluid tube, as the retaining section of the fluid tube can be removed more easily from the circumferential groove.

[0017] Alternatively or additionally, it is advantageous that the outer sleeve is movable relative to the inner sleeve from the locked position through the initial position to the disengaged position, and that at least one spreading protrusion is provided on the inner circumferential surface of the outer sleeve, the spreading protrusion being received circumferentially between two adjacent locking claws. Each spreading protrusion includes a first wedge surface on its circumferentially opposite sides, the first wedge surface tapering towards the end of the second inner sleeve. The locking claws receiving the spreading protrusion each include a second wedge surface on their circumferentially facing sides, the second wedge surface tapering towards the end of the second inner sleeve. The first wedge surface is configured to engage with the second wedge surface when the outer sleeve moves from the initial position to the disengaged position, so as to spread the locking claws from the preparatory position to a release position, in which the locking of the first fluid tube, particularly the shape-locking reception in the circumferential groove, can be completely disengaged. Particularly advantageous when there are more than two locking claws is the combination of the spreading protrusion with wedge surfaces and the locking section.

[0018] Preferably, the plug connector includes at least one spring element configured to apply a directional actuating force toward the end of the first inner sleeve to the outer sleeve in the initial position. The spring element may, for example, include a helical spring that surrounds the inner sleeve, preferably in the region at the end of the second claw of the locking pawl. This simplifies operation because locking is essentially automatically triggered.

[0019] Preferably, the second connecting section of the inner sleeve has a sealing assembly configured to create a seal between the first fluid tube and the second fluid tube. The sealing assembly may include, for example, at least two sealing rings and a spacer element disposed between the sealing rings. The inner circumferential surface of the sealing rings is configured to abut against the outer circumferential surface of the end section of the first fluid tube, and the outer circumferential surface of the sealing rings is configured to abut against the inner circumferential surface of the end section of the second fluid tube. This allows for a direct seal between the first and second fluid tubes, thus eliminating the need for special sealing requirements on the plug connector.

[0020] The locking claws may each include an insertion surface on their inner circumferential surface in the region at the end of the first inner sleeve, preferably in the region at the end of the first claw, the insertion surface being inclined toward the end of the first inner sleeve. This simplifies the operation of the plug-in connector when connecting to the first fluid tube, as the locking claws are automatically opened.

[0021] Advantageously, the second connecting section has a plurality of preferably flexible connecting tongues spaced apart circumferentially, the connecting tongues surrounding a receiving chamber for accommodating the end section of the second fluid tube. Each connecting tongue has a locking opening that extends radially through the connecting tongue and is configured to engage with a corresponding locking protrusion of the second fluid tube to lock the second fluid tube onto the inner sleeve. Alternatively or additionally, locking protrusions may be provided on the inner circumferential surface of the connecting tongues, the locking protrusions being configured to engage with corresponding locking openings of the second fluid tube to lock the second fluid tube onto the inner sleeve. This allows for a simple and shape-locking connection of the second fluid tube.

[0022] In another aspect, the present invention relates to a plug connector structural assembly comprising a plug connector according to the invention and a first fluid tube connectable to or connected to a first connection section and / or a second fluid tube connectable to or connected to a second connection section, the first fluid tube having a retaining section on its outer side for locking the first fluid tube onto the inner sleeve of the plug connector. Preferably, the plug connector includes the circumferential groove on the locking claw, and the retaining section of the first fluid tube preferably has a circumferential flange that is form-fittedly received in the circumferential groove of the locking claw of the inner sleeve.

[0023] Preferably, the plug connector is used in such a manner that a first fluid tube, including a retaining section on its outer side, is inserted into the open first inner sleeve end of the inner sleeve. Upon insertion into the first fluid tube, the retaining section radially extrudes the operating protrusion of the at least one locking element, thereby disengaging the locking protrusion of the locking element from the second stop protrusion of the operating section of the locking claw of the inner sleeve. Preferably, the outer sleeve is moved from the initial position to the locked position by the operating force of the spring element, until the locking end face of the locking protrusion of the locking element abuts against the first stop end face of the first stop protrusion of the operating section of the locking claw, and the first claw ends of the locking claw are respectively in the locked posture, and the retaining section of the first fluid tube is locked onto the inner sleeve. Preferably, the plug connector according to claim 1 is used, and the retaining section preferably has a circumferential flange that is shape-lockingly received in the circumferential groove of the locking claw of the inner sleeve.

[0024] Preferably, the outer sleeve moves relative to the inner sleeve from the locked position through the initial position to the disengaged position, and the first wedge surface of the first locking section of the at least one locking element and / or the first wedge surface of the at least one spreading protrusion cooperates with the second wedge surface of the locking pawl, thereby spreading the locking pawl from the preparatory posture to the release posture, in which the holding section of the first fluid tube can be disengaged from the inner sleeve. Attached Figure Description

[0025] To better understand this invention, the following figures will be used to explain it in detail.

[0026] In the greatly simplified schematic diagrams:

[0027] Figure 1 An exploded perspective view of a plug connector structural assembly having a plug connector according to an exemplary embodiment of the present invention is shown.

[0028] Figure 2 A perspective view and two detailed views of the inner sleeve of the plug connector are shown.

[0029] Figure 3 A perspective view and a detailed view of the outer sleeve of the plug connector are shown;

[0030] Figure 4 A perspective view of the plug connector structural assembly is shown, with the outer sleeve of the plug connector in its initial position;

[0031] Figure 5 A perspective view of the plug connector structural assembly is shown, with the outer sleeve of the plug connector located between the initial position and the locked position;

[0032] Figure 6 A perspective view of the plug connector structural assembly is shown, with the outer sleeve of the plug connector in the locked position;

[0033] Figure 7 A perspective view of the plug connector structural assembly is shown, with the outer sleeve of the plug connector in the disengaged position;

[0034] Figure 8 The diagram shows a longitudinal section of the plug connector structural assembly in the region of the second locking section, with the outer sleeve of the plug connector in its initial position.

[0035] Figure 9 A longitudinal sectional view of the plug connector structural assembly is shown in the first locking section region, with the outer sleeve of the plug connector in the initial position;

[0036] Figure 10 The diagram shows a longitudinal section of the plug connector structural assembly in the second locking section region, with the outer sleeve of the plug connector in a first posture between the initial position and the locked position;

[0037] Figure 11 The diagram shows a longitudinal sectional view of the plug connector structural assembly in the first locking section region, with the outer sleeve of the plug connector in a first posture between the initial position and the locked position;

[0038] Figure 12 A longitudinal sectional view of the plug connector structural assembly is shown in the second locking section region, with the outer sleeve of the plug connector in the locked position;

[0039] Figure 13 A longitudinal sectional view of the plug connector structural assembly is shown in the first locking section region, with the outer sleeve of the plug connector in the locked position;

[0040] Figure 14 The diagram shows a longitudinal section of the plug connector structural assembly in the second locking section region, with the outer sleeve of the plug connector in the disengaged position.

[0041] Figure 15 The diagram shows a longitudinal section of the plug connector structural assembly in the first locking section region, with the outer sleeve of the plug connector in the disengaged position. Detailed Implementation

[0042] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names, and the disclosure contained throughout the specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures, and these location descriptions are applied semantically to the new location when the location changes.

[0043] Figure 1 An exploded perspective view illustrates a plug connector structural assembly of an exemplary embodiment. The plug connector structural assembly includes a plug connector 1 according to an advantageous embodiment of the invention, a first fluid conduit 2, and a second fluid conduit 3. The plug connector 1 is configured to connect the first fluid conduit 2 and the second fluid conduit 3.

[0044] The plug connector 1 includes an inner sleeve 4 having an open first inner sleeve end 4a and an open second inner sleeve end 4b connected to the first inner sleeve end. The inner sleeve 4 is exemplarily constructed straight only here. However, the inner sleeve 4 can, of course, be constructed bent or folded if necessary.

[0045] The plug connector 1 also includes an outer sleeve 5 surrounding the inner sleeve 4, which is movable relative to the inner sleeve 4 at least between an initial position and a locked position. In the example shown, the outer sleeve 5 is movable between the initial position and the locked position along the longitudinal direction of the inner sleeve 4. The outer sleeve 5 has a first outer sleeve end 5a and an opposing second outer sleeve end 5b, as shown in... Figure 1 As shown in the diagram.

[0046] The inner sleeve 4 has a first connecting section V1 for connecting the first fluid pipe 2 in the region of the first inner sleeve end 4a. The inner sleeve 4 has a second connecting section V2 for connecting the second fluid pipe 3 in the region of the second inner sleeve end 4b.

[0047] In the example shown, the second connecting section V2 includes a plurality of connecting tongues 2 spaced apart from each other in the circumferential direction. The connecting tongues 25 are preferably flexible, allowing them to be bent outwards in the radial direction. The connecting tongues 25 surround a receiving chamber for accommodating the end section of the second fluid conduit 3.

[0048] Each connecting tongue 25 is provided with a locking opening 26, which extends radially through the corresponding connecting tongue 25. The locking opening 26 is configured to engage with a corresponding locking protrusion 27 on the second fluid tube 3 to lock the second fluid tube 3 onto the inner sleeve 4. For connection, the second fluid tube 3 can be inserted into the receiving chamber until the locking protrusion 27 engages with the locking opening 26.

[0049] Alternatively or additionally, locking protrusions may also be provided on the inner circumferential surface of the connecting tongue 25. These locking protrusions are designed to engage with corresponding locking openings on the second fluid pipe 3 to lock the second fluid pipe 3 onto the inner sleeve 4. Of course, the specific implementation of the second connecting section V2 should only be understood as an example, and those skilled in the art can also specify other suitable implementations.

[0050] The connecting tongue 25 is preferably used to indicate to the user whether the outer sleeve 5 is in the locked position. In the illustrated embodiment, this can be identified by the fact that the connecting tongue 25 extends axially from the outer sleeve 5 in the locked position, such that the outer peripheral surface of the connecting tongue 25 is exposed (see [link to illustration]). Figure 6 and Figure 12 Alternatively, for example, a machine-readable code, such as a QR code, may be provided on the connecting tongue 25 to enable automatic identification of the locking position, for example, by a suitable reading instrument.

[0051] The second connecting section V2 of the inner sleeve 4 may also include a sealing assembly 22 configured to create a seal between the first fluid tube 2 and the second fluid tube 3. This sealing assembly includes two sealing rings 23 and a spacer element 24, which, viewed axially from the inner sleeve 4, is positioned between the sealing rings 23. The inner circumferential surface of the sealing rings 23 is configured to abut against the outer circumferential surface of the end section of the first fluid tube 2. The outer circumferential surface of the sealing rings 23 is configured to abut against the inner circumferential surface of the end section of the second fluid tube 3, for example, as shown in… Figure 8 and Figure 9 As can be seen in the image.

[0052] In the illustrated embodiment, the first connecting section V1 exemplarily includes four locking claws 6. However, within the scope of the invention, it is generally sufficient to provide at least two locking claws 6. Three or more locking claws 6 may also be provided. The locking claws 6 are spaced apart from each other in the circumferential direction, such that a gap is formed between each adjacent pair of locking claws 6. The gaps are sized such that the first locking section 10, which houses the locking element 9 of the outer sleeve 5 (described in detail below), and, if necessary, the spreading protrusion 20 (described in detail below), can be accommodated therein. Each locking claw 6 has a free first claw end 6a and an opposing second claw end 6b, with a first inner sleeve end 4a resting on the first claw end and the second claw end connected to the inner sleeve 4.

[0053] In the illustrated embodiment, the locking pawl 6 has circumferential grooves 7 on its inner circumferential surface. The circumferential grooves 7... Figure 1As can be seen, a circumferential groove 7 is disposed axially between the first claw end 6a and the second claw end 6a. The circumferential groove 7 is configured to form-fit the retaining section 8 of the first fluid tube 2 when the locking claw 6 is in the locking posture. Figure 1 As can be seen, the retaining section 8 of the first fluid pipe 2 is advantageously constructed as a circumferential flange, which preferably extends around the entire perimeter. The position and size of the circumferential groove 7, as well as the size of the first fluid pipe 2, and in particular the position and size of the circumferential flange, are preferably coordinated with each other.

[0054] The plug connector 1 preferably also includes a spring element 21 configured to apply a manipulating force to the outer sleeve 5 in its initial position, directed toward either the first outer sleeve end 5a or the first inner sleeve end 4a. Thus, the outer sleeve 5 is pre-tightened in the initial position and can preferably be automatically moved from the initial position to the locked position by the spring force when the first fluid tube 2 is connected. In the illustrated example, the spring element 21 includes, for example, a helical spring that, in the assembled state, surrounds the inner sleeve 4 in the region of the second claw end 6b of the locking claw 6. Of course, those skilled in the art may choose other suitable embodiments.

[0055] To simplify the insertion of the first fluid pipe 2 into the first inner sleeve end 4a of the inner sleeve 4, the locking claw 6 may include an insertion surface 28 on its inner circumferential surface in the region of the first inner sleeve end 4a, the insertion surface being inclined toward the first inner sleeve end 4a. The insertion surface 28 is located in... Figure 1 It can be seen in the middle.

[0056] Figure 2 A perspective view of the inner sleeve 4 and two detailed views, detail A and detail B, are shown. The first claw tip 6a can be moved radially relative to the corresponding second claw tip 6b between the ready position and the locked position. The inner sleeve 4 can be made of plastic, and the locking claw 6 can be integrally constructed with the inner sleeve 4. Thus, the first claw tip 6a can be advantageously and elastically bent between the locked position and the ready position.

[0057] The locking pawl 6 has actuating sections 14 on its outer peripheral surface. The actuating sections 14 are located in... Figure 2 As can be seen in detail A and especially in detail B, the actuating section 14 is disposed in the region of the circumferentially facing ends of the locking pawl 6 (forming a gap between the ends). The actuating section 14 extends along the respective locking pawl 6 between the first pawl end 6a and the second pawl end 6b.

[0058] The operating section 14 has a first stop protrusion 15 with a first stop end face 15a and a second stop protrusion 16 with a second stop end face 16a. The first stop end face 15a and the second stop end face 16a face the second inner sleeve end 4b. The first stop end face 15a is closer to the first inner sleeve end 4a, or the first claw end 6a, than the second stop end face 16a. The operating section 14 is used to cooperate with the second locking section 11 of the locking element 9 of the outer sleeve 5, which will be described in detail later. The exact function will be described in detail later.

[0059] In the example shown, the operating section 14 of the locking pawl 6 includes a sliding surface 17 connecting the first stop end face 15a and the second stop end face 16a. The sliding surface 17 has a blocking surface 17a inclined toward the first pawl end face 6a, as can be seen in detail B. The function of the blocking surface is also described in detail below.

[0060] Figure 3 A perspective view of the outer sleeve 5 and a detailed view of the locking element 9 are shown (detail C). In the illustrated embodiment, the outer sleeve 5 includes two locking elements 9, which are arranged opposite each other in diameter. If the inner sleeve has only two locking claws 6, then in principle, it is sufficient to provide only one locking element 9 on the outer sleeve 5.

[0061] The locking element 9 has a first locking section 10 and two second locking sections 11, the first locking section being accommodated circumferentially between two adjacent locking claws 6 of the inner sleeve 4 (see example). Figure 6 The second locking section is connected to the first locking section 10. The locking element 9 is disposed on the inner circumferential surface of the outer sleeve 5. The locking element 9 has a free first locking element end 9a and an opposing second locking element end 9b. The first locking element end faces the first outer sleeve end 5a, or in the assembled state, faces the first inner sleeve end 4a. The second locking element end is connected to the inner circumferential surface of the outer sleeve 5.

[0062] The first locking element end 9a can move radially relative to the second locking element end 9b. The outer sleeve 5 is preferably made of a suitable plastic, and the locking element 9 can be integrally constructed with the outer sleeve 5. In this case, the first locking element end 9a can be elastically bent relative to the corresponding second locking element end 9b.

[0063] The first locking section 10 has an operating protrusion 12 pointing radially inward. The second locking section 11 each has a locking protrusion 13 pointing radially inward, the locking protrusion including a locking end face 13a facing the end 5a of the first outer sleeve. In the assembled state, the locking end face 13a also faces the end 4a of the first inner sleeve.

[0064] As in Figure 3 As can be seen, the first locking section 10 is centrally located between the two second locking sections 11 in the circumferential direction and includes the end 9a of the first locking element. Here, the operating protrusion 12 is located on the first locking section 10 in the region of the end 9a of the first locking element. The locking protrusions 13 of the second locking sections 11 are respectively located in the longitudinal direction between the operating protrusion 12 and the end 9b of the second locking element. The second locking sections 11 are integrally constructed with the first locking section 10 located therebetween.

[0065] The actuating protrusion 12 may include a first actuating ramp 29 on the end 9a of the first locking element. This first actuating ramp is configured to engage with the holding section 8 of the first fluid tube 2 when the first fluid tube 2 is inserted into the end 4a of the first inner sleeve to extrude the actuating protrusion 12. The actuating protrusion 12 also includes a second actuating ramp 30 on the side facing the end 9b of the second locking element. This second actuating ramp is configured to engage with the holding section 8 of the first fluid tube 2 when the first fluid tube 2 is removed from the end 4a of the first inner sleeve to extrude the actuating protrusion 12. The function of the actuating ramps 29 and 30 is further described below.

[0066] In the example shown, the first locking section 10 of the locking element 9 includes a first wedge surface 18 on its circumferentially opposite sides, the first wedge surface tapering towards the end 5b of the second outer sleeve, or in the assembled state towards the end 4b of the second inner sleeve. One of the two first wedge surfaces is located at... Figure 3 Details can be seen in C.

[0067] In the example shown, the locking claw 6 of the inner sleeve 4 includes a second wedge surface 19 on its circumferentially facing sides (between which form a gap for receiving the locking element 9 of the outer sleeve 5). The second wedge surface 19 tapers toward the second inner sleeve end 4b, or the second claw end 6b, as shown in... Figure 2 As can be seen in detail A.

[0068] The first wedge surface 18 of the locking element 9 is configured to cooperate with the corresponding second wedge surface 19 of the locking pawl 6 during the movement of the outer sleeve 5, in order to radially expand the locking pawl 6. (The following is an explanation of the previous sentence.) Figure 14 and Figure 15 It also describes the functions in detail.

[0069] In the example shown, two spreading protrusions 20 are also provided on the inner circumferential surface of the outer sleeve 5. The spreading protrusions 20 are arranged opposite each other in diameter. The spreading protrusions 20 are spaced apart from the locking element 9 at a 90° angle along the circumferential direction. Figure 3As can be seen in the image. Similar to the first locking section 10 of the locking element 9, the spreading protrusion 20 also has a first wedge surface 18 on its circumferentially opposite sides. The first wedge surface tapers towards the end 5b of the second outer sleeve, or in the assembled state towards the end 4b of the second inner sleeve, as shown in the image. Figure 14 and Figure 15 As can be seen in the image.

[0070] The locking claws 6 of the inner sleeve 4 include a second wedge surface 19 on their circumferentially facing sides (forming a gap between the sides for receiving the spreading protrusion 20 of the outer sleeve 5). The second wedge surface 19 tapers toward the end 4b of the second inner sleeve, or the end 6b of the second claw, as in... Figure 14 As can be seen in the image.

[0071] The first wedge surface 18 of the expanding protrusion 20 is configured to cooperate with the corresponding second wedge surface 19 of the locking pawl 6 during the movement of the outer sleeve 5, in order to expand the locking pawl 6. The function is described in detail below.

[0072] The following uses Figures 4 to 15 Describe the function of connector 1 in detail.

[0073] Figure 4 A perspective view of the plug connector structural assembly is shown. The second fluid pipe 3 connects to the second connection section V2 of the plug connector 1 (see...). Figure 1 The first fluid tube 2 is in the state prior to being connected to the plug connector 1. The outer sleeve 5 of the plug connector 1 is in the initial position. Figure 8 and Figure 9 Show respectively Figure 4 A longitudinal sectional view of the plug-in connector structural assembly. Figure 8 The cutting plane is located in the region of the second locking section 11 of the locking element 9, and Figure 9 The cutting plane is located in the region of the first locking section 10 of the locking element 9.

[0074] The locking claw 6 of the inner sleeve 4 is in a preparatory position in the initial position of the outer sleeve 5. In this preparatory position, the first fluid pipe 2 can be inserted into the end 4a of the first inner sleeve, as shown in... Figure 4 As indicated by the corresponding arrows. Figure 9 As can be seen, the actuating protrusion 12 of the first locking section 10 of the locking element 9 is located in a position in which the actuating protrusion can be actuated by the retaining section 8 of the first fluid pipe 2, particularly the circumferential flange.

[0075] As in Figure 8As can be seen, the locking end face 13a of the locking protrusion 13 of the second locking section 11 of the locking element 9 of the outer sleeve 5 abuts against the corresponding second stop end face 16a of the second stop protrusion 16 of the operating section 14 of the locking pawl 6 of the inner sleeve 4. Thus, the outer sleeve 5 is fixed in the initial position. The first inner sleeve end 4a of the inner sleeve 4 preferably protrudes beyond the first outer sleeve end 5a of the outer sleeve 5 in the initial position.

[0076] Figure 5 A perspective view of the plug connector structural assembly is shown. The second fluid tube 3 is connected to the second connection section V2 of the plug connector 1, and the first fluid tube 2 is in a certain position during the connection process with the first connection section V1 of the plug connector 1. The outer sleeve 5 of the plug connector 1 is in a certain position between the initial position and the locking position. Figure 10 and Figure 11 Show respectively Figure 5 A longitudinal sectional view of the plug-in connector structural assembly. Figure 10 The cutting plane is located in the region of the second locking section 11 of the locking element 9, and Figure 11 The cutting plane is located in the region of the first locking section 10 of the locking element 9.

[0077] As in Figure 11 As can be seen, when the first fluid tube 2 is inserted into the end 4a of the first inner sleeve, an operating force FB can be applied to the operating protrusion 12 of the first locking section 10 of the locking element 9 radially outward by holding section 8, particularly the circumferential flange. By connecting the second locking section 11 to the first locking section 10, the operating force FB can disengage the locking protrusion 13 from the second stop protrusion 16. This allows the outer sleeve 5 to disengage from the inner sleeve 4 and move from the initial position to the locked position. This movement is preferably assisted by the spring element 21 or, if necessary, automatically. The outward extrusion of the locking element 9 can be simplified by the first operating ramp 29 on the operating protrusion 12.

[0078] Figure 6 A perspective view of the plug connector structural assembly is shown. The second fluid tube 3 is reconnected to the second connection section V2 of the plug connector 1, and the first fluid tube 2 is connected to the first connection section V1 of the plug connector 1 (see...). Figure 1 The outer sleeve 5 of the plug connector 1 is correspondingly located in the locking position. Figure 12 and Figure 13 Show respectively Figure 6 A longitudinal sectional view of the plug-in connector structural assembly. Figure 12 The cutting plane is located in the region of the second locking section 11 of the locking element 9, and Figure 13The cutting plane is located in the region of the first locking section 10 of the locking element 9.

[0079] In the locked position of the outer sleeve 5, the locking claws 6 are respectively in the locking posture, in which the holding section 8 of the first fluid tube 2 is locked onto the inner sleeve 4. In the example shown, in particular, the circumferential flange of the first fluid tube 2 is fitted into the circumferential groove 7 of the locking claw 6, as in Figure 12 As can be seen in [the text]. As in [the text] Figure 12 As can also be seen, the locking end face 13a of the locking protrusion 13 of the second locking section 11 of the locking element 9 abuts against the corresponding first stop end face 15a of the first stop protrusion 15 of the operating section 14 of the locking pawl 6.

[0080] To disengage, the outer sleeve 5 can first be manually moved from the locked position back to the initial position by the user. On one hand, undesirable movement of the outer sleeve 5 from the locked position to the initial position can be prevented by manipulating the inclined resisting surface 17a of the sliding surface 17 of the manipulating section 14, because a certain amount of force is required to overcome the resisting surface 17a via the locking protrusion 13. Furthermore, the spring force of the spring element 21 counteracts undesirable disengagement of the outer sleeve 5.

[0081] If the outer sleeve 5 is moved back to the initial position, the locking protrusion 13 can be engaged again into the corresponding second stop end face 16a, and in principle, the first fluid tube 2 can be pulled out from the inner sleeve 4. In this case, the holding section 8 of the first fluid tube 2, in particular the circumferential flange, can cooperate with the second operating ramp 30 on the operating protrusion 12 to simplify the removal of the first fluid tube 2.

[0082] However, according to an advantageous embodiment of the invention, the outer sleeve 5 can be further moved relative to the inner sleeve 4 from the locked position via the initial position to the disengaged position. The disengaged position facilitates the removal of the first fluid tube 2 from the first connecting section V1.

[0083] Figure 7 A perspective view of the plug connector structural assembly is shown. The second fluid tube 3 is connected to the second connection section V2 of the plug connector 1, and the first fluid tube 2 is in a disengaged state from the plug connector 1. The outer sleeve 5 of the plug connector 1 is in the disengaged position. Figure 14 and Figure 15 Show Figure 7 A longitudinal sectional view of the plug-in connector structural assembly. Figure 14 The cutting plane is located in the region of the second locking section 11 of the locking element 9, and Figure 15 The cutting plane is located in the region of the first locking section 10 of the locking element 9.

[0084] If you have already used Figure 3 As described, the first locking section 10 of the locking element 9, in the illustrated embodiment, has a first wedge surface 18, which tapers toward the end 5b of the second outer sleeve, or toward the end 4b of the second inner sleeve in the assembled state. Furthermore, the locking claws 6 each have a second wedge surface 19 on their circumferentially facing sides (in the gap accommodating the first locking section 10), which tapers toward the end 5b of the second outer sleeve, or toward the end 4b of the second inner sleeve in the assembled state (see [link to description]). Figure 2 ).

[0085] Similarly, as already used Figure 3 As described, in the illustrated embodiment, two spreading protrusions 20 are provided on the inner circumferential surface of the outer sleeve 5. The spreading protrusions 20 are respectively accommodated in the gaps between two adjacent locking claws 6 (more precisely, in the gaps where the locking element 9 is not provided) in the circumferential direction. Each of the spreading protrusions 20 has a first wedge surface 18 on its circumferentially opposite sides, the first wedge surface tapering towards the end 5b of the second outer sleeve, or in the assembled state towards the end 4b of the second inner sleeve, as in… Figure 14 and Figure 15 As can be seen in the image.

[0086] Furthermore, the locking claws 6 each have a second wedge surface 19 on their circumferentially facing sides (in the corresponding gaps accommodating the spreading protrusions 20), the second wedge surface tapering toward the end 5b of the second outer sleeve or, in the assembled state, toward the end 4b of the second inner sleeve (see...). Figure 2 as well as Figure 14 and Figure 15 ).

[0087] When the outer sleeve 5 is from (in) Figure 4 and Figure 8 , Figure 9 The initial position (as shown in the diagram) is further moved to (in...) Figure 7 and Figure 14 , Figure 15 In the disengaged position (as shown in the diagram), the first wedge surface 18 of the locking element 9 and the first wedge surface 18 of the spreading protrusion 20 cooperate with the corresponding second wedge surface 19 of the locking pawl 6 to spread the locking pawl 6 from the preparatory position to the release position. The release position is... Figure 7 China and in Figure 14 and Figure 15As can be seen, in the released posture, the locking pawl 6 is stretched radially to such an extent that the locking of the retaining section 8 of the first fluid tube 2 on the inner sleeve 4, and particularly the shape-locking reception of the circumferential flange in the circumferential groove 7, is completely disengaged. Thus, the first fluid tube 2 can be easily disengaged from the plug connector 1, as in... Figure 14 and Figure 15 As indicated by the arrow in the middle.

[0088] After the first fluid tube 2 is disengaged, the outer sleeve 5 can be moved back to the initial position, preferably with the assistance of the trigger spring 21. The components of the plug connector 1 are preferably in the unloaded state in the initial position to avoid material fatigue, particularly relaxation of the plastic.

[0089] The various embodiments illustrate possible implementation variations. It should be noted that the invention is not limited to the embodiments specifically shown. Rather, different combinations of the various implementation variations are possible, and such variations are based on the teachings of the specific invention and are within the capabilities of those skilled in the art.

[0090] The scope of protection is defined by the claims. However, the description and drawings are considered in order to interpret the claims. Individual features or combinations of features in the different embodiments shown and described can be independent, inventive solutions in themselves. The task of finding a solution based on the independent invention can be derived from the description.

[0091] The full description of the numerical range in the specific specification should be understood such that the numerical range together includes any and all the sub-ranges that arise therefrom. For example, the description of 1 to 10 should be understood as including all sub-ranges starting from the lower limit of 1 and the upper limit of 10, that is, all sub-ranges that start with a lower limit of 1 or greater and end with an upper limit of 10 or less, such as 1 to 1.7, or 3.2 to 8.1, or 5.5 to 10.

[0092] The regulations stipulate that, in order to better understand the structure, the components are shown partially out of proportion and / or enlarged and / or reduced.

[0093] List of reference numerals

[0094] 1. Connector

[0095] 2 First fluid tube

[0096] 3 Second fluid tube

[0097] 4 Inner Sleeve

[0098] 4a First inner sleeve end

[0099] 4b Second inner sleeve end

[0100] 5 outer sleeves

[0101] 5a First outer sleeve end

[0102] 5b Second outer sleeve end

[0103] 6 locking claws

[0104] 7-week trough

[0105] 8 Maintaining Section

[0106] 9-card lock components

[0107] 9a First locking element end

[0108] 9b Second locking element end

[0109] 10 First Card Lock Section

[0110] 11 Second Lock Section

[0111] 12 control protrusions

[0112] 13-lock protrusion

[0113] 13a Lock End Face

[0114] 14 control sections

[0115] 15 First stop protrusion

[0116] 15a First Stop End Face

[0117] 16 Second stop protrusion

[0118] 16a Second Stop End Face

[0119] 17 Sliding Surfaces

[0120] 17a Restriction Surface

[0121] 18 First wedge surface

[0122] 19 Second wedge surface

[0123] 20 stretch protrusion

[0124] 21 Spring Components

[0125] 22 Sealing Components

[0126] 23 sealing ring

[0127] 24 spacer elements

[0128] 25 connecting tongues

[0129] 26 Locking Opening

[0130] 27 Locking protrusions

[0131] 28 Insertion Surfaces

[0132] 29 First Control Incline

[0133] 30 Second Operating Incline

[0134] V1 First Connection Section

[0135] V2 Second Connecting Section

[0136] FB Manipulation

Claims

1. A plug connector (1) for connecting a first fluid tube (2) and a second fluid tube (3), the plug connector (1) comprising an inner sleeve (4) and an outer sleeve (5) surrounding the inner sleeve (4), the inner sleeve having an open first inner sleeve end (4a) and an open second inner sleeve end (4b) connected to the first inner sleeve end, the outer sleeve being movable relative to the inner sleeve (4) between an initial position and a locked position, the inner sleeve (4) having a first connecting section (V1) for connecting the first fluid tube (2) in the region of the first inner sleeve end (4a) and a second connecting section (V2) for connecting the second fluid tube (3) in the region of the second inner sleeve end (4b), characterized in that, The first connecting section (V1) includes at least two locking claws (6) spaced apart from each other in the circumferential direction. The locking claws are in a preparatory position in the initial position of the outer sleeve (5), in which the first fluid tube (2) can be inserted into the end (4a) of the first inner sleeve. The locking claws are in a locked position in the locked position of the outer sleeve (5), in which the holding section (8) of the first fluid tube (2) can be locked onto the inner sleeve (4). (5) Includes at least one locking element (9), the locking element having a first locking section (10) and two second locking sections (11), the first locking section (10) being accommodated circumferentially between two adjacent locking claws (6) of the inner sleeve (4), the two second locking sections being connected to the first locking section (10), the first locking section (10) including an operating protrusion (12), and the second locking sections (11) each including a locking protrusion (13), the locking protrusion having a surface For the locking end face (13a) of the first inner sleeve end (4a), the locking pawl (6) has at least one operating section (14) on its outer peripheral surface. The operating section includes a first stop protrusion (15) with a first stop end face (15a) and a second stop protrusion (16) with a second stop end face (16a). The locking end face (13a) of the locking protrusion (13) abuts against the second stop end face (16a) of the second stop protrusion (16) in the initial position of the outer sleeve (5), and Furthermore, when the first fluid tube (2) is inserted into the end (4a) of the first inner sleeve, the operating protrusion (12) can be extruded outward in the radial direction through the retaining section (8), so that the locking protrusion (13) can disengage from the second stop protrusion (16) and the outer sleeve (5) can move from the initial position to the locked position, in which the locking end face (13a) of the locking protrusion (13) abuts against the first stop end face (15a) of the first stop protrusion (15).

2. The plug connector (1) according to claim 1, characterized in that, The outer sleeve (5) can move between the initial position and the locking position along the longitudinal direction of the inner sleeve (4), and / or in the initial position of the outer sleeve (5), the first inner sleeve end (4a) of the inner sleeve (4) protrudes from the first outer sleeve end (5a) of the outer sleeve (5).

3. The plug connector (1) according to claim 1 or 2, characterized in that, The locking claws (6) each have a free first claw end (6a) and an opposite second claw end (6b). The first inner sleeve end (4a) is located on the first claw end, and the second claw end is connected to the inner sleeve (4). The first claw end (6a) can move radially relative to the second claw end (6b) between the preparatory posture and the locking posture. The locking claws (6) each have a circumferential groove (7) on their inner circumferential surface. The circumferential groove is located between the first claw end (6a) and the second claw end (6b). The circumferential groove (7) is configured to shape-lockingly accommodate the holding section (8) of the first fluid tube (2) in the locking posture of the locking claws (6).

4. The plug connector (1) according to any one of claims 1 to 3, characterized in that, At least one locking element (9) is disposed on the inner circumferential surface of the outer sleeve (5) and has a free first locking element end (9a) and an opposing second locking element end (9b). The first locking element end faces the first inner sleeve end (4a), and the second locking element end is connected to the inner circumferential surface of the outer sleeve (5). The first locking element end (9a) can move radially relative to the second locking element end (9b).

5. The plug connector (1) according to claim 4, characterized in that, The actuating protrusion (12) includes a first actuating ramp (29) on the end (9a) of the first locking element, the first actuating ramp being configured to cooperate with the holding section (8) of the first fluid tube (2) when the first fluid tube (2) is inserted into the end (4a) of the first inner sleeve to extrude the actuating protrusion (12), and / or the actuating protrusion (12) includes a second actuating ramp (30) on the side facing the end (9b) of the second locking element, the second actuating ramp being configured to cooperate with the holding section (8) of the first fluid tube (2) when the first fluid tube (2) is removed from the end (4a) of the first inner sleeve to extrude the actuating protrusion (12).

6. The plug connector (1) according to any one of claims 1 to 5, characterized in that, The first locking section (10) is centrally located between the two second locking sections (11) in the circumferential direction and includes the end of the first locking element (9a). The operating protrusion (12) is located on the first locking section (10) in the region of the end of the first locking element (9a). The locking protrusion (13) of the second locking section (11) is located in the longitudinal direction between the operating protrusion (12) and the end of the second locking element (9b).

7. The plug connector (1) according to any one of claims 1 to 6, characterized in that, It is provided with at least three, preferably at least four, locking claws (6), and / or at least two locking elements (9).

8. The plug connector (1) according to any one of claims 1 to 7, characterized in that, The operating section (14) of the locking pawl (6) includes a sliding surface (17), which connects the first stop end face (15a) and the second stop end face (16a). The sliding surface (17) includes a blocking surface (17a) that is inclined toward the end face (6a) of the first pawl.

9. The plug connector (1) according to any one of claims 1 to 8, characterized in that, The inner sleeve (4) is made of plastic, the locking claw (6) is integrally constructed with the inner sleeve (4), and the end (6a) of the first claw can be elastically bent between the locking posture and the preparatory posture, and / or the outer sleeve (5) is made of plastic, the at least one locking element (9) is integrally constructed with the outer sleeve (5), and the end (9a) of the first locking element can be elastically bent in the radial direction relative to the end (9b) of the second locking element.

10. The plug connector (1) according to any one of claims 1 to 9, characterized in that, The outer sleeve (5) is movable relative to the inner sleeve (4) from the locked position to the disengaged position via the initial position. The first locking section (10) of the at least one locking element (9) includes a first wedge surface (18) on its circumferentially opposite sides, the first wedge surface (18) tapering toward the end (4b) of the second inner sleeve. The locking claw (6) accommodating the first locking section (10) includes a second wedge surface (19) on its circumferentially opposite sides, the second wedge surface (19) tapering toward the end (4b) of the second inner sleeve. The first wedge surface (18) is configured to cooperate with the second wedge surface (19) when the outer sleeve (5) moves from the initial position to the disengaged position, so as to open the locking claw (6) from the preparatory position to the release position, in which the locking of the first fluid tube (2), particularly the shape-locked accommodating section (8) in the circumferential groove (7), can be completely disengaged.

11. The plug connector (1) according to any one of claims 1 to 10, characterized in that, The outer sleeve (5) is movable relative to the inner sleeve (4) from the locked position through the initial position to the disengaged position. At least one spreading protrusion (20) is provided on the inner circumferential surface of the outer sleeve (5). The spreading protrusion is accommodated circumferentially between two adjacent locking claws (6). Each spreading protrusion (20) includes a first wedge surface (18) on its circumferentially opposite sides. The first wedge surface (18) tapers towards the end (4b) of the second inner sleeve. The locking claws (6) accommodating the spreading protrusion (20) are located in… Each of the sides facing each other in the circumferential direction includes a second wedge surface (19), which tapers toward the end (4b) of the second inner sleeve, and the first wedge surface (18) is configured to cooperate with the second wedge surface (19) when the outer sleeve (5) moves from the initial position to the disengaged position, so as to open the locking claw (6) from the preparatory posture to the release posture, in which the locking of the first fluid tube (2), particularly the shape-locking containment in the circumferential groove (7), can be completely disengaged.

12. The plug connector (1) according to any one of claims 1 to 11, characterized in that, The plug connector (1) includes at least one spring element (21) configured to apply a manipulating force to the outer sleeve (5) in the initial position in a direction pointing toward the end (4a) of the first inner sleeve.

13. The plug connector (1) according to claim 12, characterized in that, The spring element (21) includes a helical spring that surrounds the inner sleeve (4), preferably in the region of the second claw end (6b) of the locking claw (6).

14. The plug connector (1) according to any one of claims 1 to 13, characterized in that, The second connection section (V2) of the inner sleeve (4) includes a sealing assembly (22) configured to create a seal between the first fluid tube (2) and the second fluid tube (3).

15. The plug connector (1) according to claim 14, characterized in that, The sealing assembly includes at least two sealing rings (23) and a spacer element (24) disposed between the sealing rings (23). The inner circumferential surface of the sealing rings (23) is configured to abut against the outer circumferential surface of the end section of the first fluid tube (2), and the outer circumferential surface of the sealing rings (23) is configured to abut against the inner circumferential surface of the end section of the second fluid tube (3).

16. The plug connector (1) according to any one of claims 1 to 15, characterized in that, The locking claw (6) includes an insertion surface (28) on its inner circumferential surface in the region of the first inner sleeve end (4a), preferably in the region of the first claw end (6a), the insertion surface being inclined toward the first inner sleeve end (4a).

17. The plug connector (1) according to any one of claims 1 to 16, characterized in that, The second connecting section (V2) has a plurality of preferably flexible connecting tongues (25) spaced apart from each other in the circumferential direction. The connecting tongues surround a receiving chamber for accommodating the end section of the second fluid tube (3). Locking openings (26) are provided on the connecting tongues (25) respectively. The locking openings penetrate the connecting tongues (25) in the radial direction and are configured to cooperate with the corresponding locking protrusions (27) of the second fluid tube (3) to lock the second fluid tube (3) onto the inner sleeve (4). And / or locking protrusions are provided on the inner circumferential surface of the connecting tongues (25) respectively. The locking protrusions are configured to cooperate with the corresponding locking openings of the second fluid tube (3) to lock the second fluid tube onto the inner sleeve (4).

18. A plug connector structure assembly comprising a plug connector (1) according to any one of claims 1 to 17, a first fluid tube (2) connectable to or connected to the first connection section (V1) and / or a second fluid tube (3) connectable to or connected to the second connection section (V2), the first fluid tube (2) having a retaining section (8) on its outer side for locking the first fluid tube (2) onto the inner sleeve (4) of the plug connector (1), the plug connector (1) preferably being constructed according to claim 3, and the retaining section (8) preferably having a circumferential flange that is form-fittedly received in a circumferential groove (7) of a locking claw (6) of the inner sleeve (4).

19. The application of the plug connector (1) according to any one of claims 1 to 17, characterized in that, The first fluid tube (2), including the retaining section (8) on the outer side, is inserted into the open first inner sleeve end (4a) of the inner sleeve (4). Upon insertion of the first fluid tube (2), the retaining section (8) radially extrudes the operating protrusion (12) of at least one locking element (9), causing the locking protrusion (13) of the locking element (9) to disengage from the second stop protrusion (16) of the operating section (14) of the locking pawl (6) of the inner sleeve (4), and preferably by the operating force of the spring element (21), the outer sleeve (5) is moved from the initial position to the locked position until... The locking end face (13a) of the locking protrusion (13) of the locking element (9) abuts against the first stop end face (15a) of the first stop protrusion (15) of the operating section (14) of the locking pawl (6), and the first pawl end (6a) of the locking pawl (6) is respectively in a locking posture and the holding section (8) of the first fluid tube (2) is locked on the inner sleeve (4), preferably using the plug connector (1) according to claim 3, and the holding section (8) preferably has a circumferential flange that is fitted in a locking shape in the circumferential groove (7) of the locking pawl (6) of the inner sleeve (4).

20. The application according to claim 19, wherein the plug connector (1) is constructed according to claim 10 or 11, characterized in that, The outer sleeve (5) moves from the locked position to the disengaged position relative to the inner sleeve (4) via the initial position. The first wedge surface (18) of the first locking section (10) of the at least one locking element (9) and / or the first wedge surface (18) of the at least one spreading protrusion (20) cooperate with the second wedge surface (19) of the locking pawl (6), thereby spreading the locking pawl (6) from the preparatory position to the release position, in which the holding section (8) of the first fluid tube (2) can disengage from the inner sleeve (4).

Images