Plug connector with assembly lock

Abstract

The present invention relates to a plug connector (1) for connecting a first fluid line to a mating plug connector (2), the plug connector having a base (4) with a through channel (6) fluidly connected to an end of a sleeve section (8) designed as the base (4). A cage (12) is arranged in a receiving channel (10) of the sleeve section (8), the cage being insertable into the receiving channel (10) of the sleeve section (8) along an assembly direction (M) and held axially relative to the assembly direction (M) in a form-locking manner. Two retaining arms (18) of a retaining clamp (20) extending parallel to each other extend into a through hole (16) of the cage (12) in a stationary state, and are designed to elastically expand radially to a tensioned state with respect to the through hole (16). The retaining clip (20) is designed to be displaceable between an insertion position and a blocking position, wherein the retaining arm (18) is expandable to its tensioned state in the insertion position of the retaining clip (20) and blocks expansion to the tensioned state in the blocking position of the retaining clip (20). The retaining clip (20) has two radially resilient support arms (22) that secure the cage (12) in a form-locking manner in the receiving channel (10) and extend into the through hole (16) in a static state, and are designed to be radially resiliently expand to the tensioned state.

Description

Technical Field

[0001] This invention relates to a plug connector for connecting a first fluid line to a mating plug connector. The plug connector has a base with a through channel. The through channel is fluidly connected to an end of the base designed as a sleeve section, wherein a clamp is arranged in a receiving channel of the sleeve section. The clamp can be inserted into the receiving channel of the sleeve section in an assembly direction and is held axially relative to the assembly direction in a form-locking manner. Two parallel retaining arms of a retaining clip inserted perpendicular to the assembly direction into the clamp extend into a through-hole of the clamp when the retaining arms are in a stationary state and are designed to expand resiliently radially to the through-hole into a tensioned state. The retaining clip is designed to be radially displaced relative to the through-hole from an insertion position to a blocking position and from a blocking position to an insertion position. In the insertion position of the retaining clip, the retaining arms can expand to their tensioned state. Alternatively, the retaining arms are blocked in the blocking position of the retaining clip to prevent expansion to their tensioned state. Background Technology

[0002] A mating connector for connecting mating connectors is known from WO 2015 / 181396 A2. In this mating connector, the cage has a locking tongue extending in the assembly direction, which, in the inserted state, engages axially with a form-locking mechanism in a recess in the peripheral wall of the sleeve section. Furthermore, the mating connector has a locking arm extending in the opposite assembly direction, which prevents the mating connector from moving against the assembly direction. It has been shown to be disadvantageous that the locking tongue, which holds the cage in the sleeve section in a form-locking manner, must be designed to be very large, thus requiring a relatively large installation space.

[0003] To prevent unnecessary loosening of the mating connector, WO 2015 / 181396 A2 provides a locking element disposed on the outer periphery of the sleeve section. The locking element is arranged to be axially displaceable relative to the assembly direction, wherein the locking element in the locked position prevents the locking arm from radially unfolding, thereby preventing the mating connector from being released. It has been shown that even when the mating connector is not inserted, the locking element can move to the locked position and prevent the mating connector from being inserted. Furthermore, locking requires an additional assembly step, which increases the assembly workload.

[0004] Another drawback is the locking arm, which covers the mating shaft of the mating connector along a certain axial length to maintain radial elasticity, but only provides relatively small surface coverage for the mating connector. Particularly in cases of large sizes and vibrations, especially for mating connectors with mating diameters exceeding 14 mm, the mating connector may fail and separate under certain conditions. It has also been found that large tensile or compressive loads can lead to leakage or damage to the clamp. Summary of the Invention

[0005] The object of the present invention is to provide a plug connector that overcomes the disadvantages known in the prior art, and in particular improves at least resistance, sealing and / or assembly.

[0006] According to the invention, the objective is achieved by the features of the characteristic portion of the invention. Because the retaining clamp has two support arms that are radially elastic to the through hole, and the support arms axially and shape-lockingly fix the clamp cage in the receiving channel in the assembly direction, and extend into the through hole in the resting state of the support arms, and are designed to be radially elastically expanded to a tensioned state in the through hole, the axial extension of the clamp cage is shortened, thereby saving installation space, which can be selectively used for additional sealing devices.

[0007] Furthermore, the retaining clip according to the invention has the following advantages: it secures the cage in the receiving channel of the sleeve section and secures the mating connector in the through hole of the cage. By integrating the pre-assembled lock into the retaining clip, the number of components of the connector can be advantageously reduced, which also leads to a reduction in assembly steps.

[0008] Furthermore, embodiments of the invention provide the technical possibility that the retaining clip cannot move to the blocking position when the support arm is stationary. This advantageously provides a pre-assembly lock that prevents the retaining clip from moving to the blocking position before the mating connector is inserted into the through hole and prevents the mating connector from being inserted.

[0009] In a particular embodiment of the invention, when the support arm is stationary and the retaining clip is in the insertion position, the retaining clip is prevented from moving from the insertion position to the blocking position. Advantageously, the retaining clip thus cannot move to the blocking position and prevent the insertion of the mating connector.

[0010] Another advantageous embodiment specifies that when the retaining arm is in the tensioned state and the retaining clip is in the insertion position, the retaining clip is prevented from shifting from the insertion position to the blocking position. This embodiment advantageously prevents the retaining clip from moving to the blocking position before the mating connector is fully inserted. In particular, it prevents incorrect assembly and provides additional assembly control.

[0011] Another advantage is that when the support arm is stationary and the retaining clip is in the blocking position, the retaining clip is force-form locked to resist displacement from the blocking position to the insertion position. Advantageously, the force-form lock must first be overcome before the retaining clip moves to the insertion position (which could potentially lead to the risk of the mating connector being accidentally released from the through hole). In particular, this design makes the mating connection more resistant to external influences such as vibration.

[0012] During insertion, the mating connector is inserted into the through hole along the assembly direction using the plug shaft. Here, the plug shaft passes through the section of the retaining arm extending into the through hole and the section of the support arm extending into the through hole. Preferably, the plug shaft, retaining arm, and support arm are designed to correspond to each other, such that the plug shaft applies a radially outward force along the assembly direction to the retaining arm and support arm. Due to the outward force, the retaining arm and support arm each elastically deform radially outward from a rest state to a tensioned state.

[0013] The mating connector has an advantageous locking groove on the back of the mating shaft, the diameter of which is smaller than the diameter of the mating shaft.

[0014] Advantageously, the retaining arm is arranged adjacent to the locking groove of the fully inserted mating connector in the assembled state, particularly when the mating connector is fully inserted into the through channel along the assembly direction. Because the locking groove has a reduced diameter, the retaining arm advantageously relaxes, deforming from an expanded, tensioned state in the region of the locking groove back to a stationary state. This advantageously prevents axial movement of the mating connector against the assembly direction in a form-locking manner.

[0015] Because the mating connector allows for advantageous adjustment of the tension and resting states of the retaining arm and / or support arm, the insertion depth of the mating connector can be controlled during and after insertion by checking the state of the retaining arm and / or support arm.

[0016] Advantageously, the retaining clip is U-shaped. Preferably, the support arm and the retaining arm are also connected to each other by a connecting section. In particular, the connecting section is also a force introduction point, such that radial displacement of the retaining clip from the blocking position to the insertion position and from the insertion position to the blocking position can be caused by tension or pressure on the connecting section. Preferably, especially to reduce assembly work, the support arm and the retaining arm extend from the connecting section to their respective free ends in the same direction, wherein in a particular embodiment, the support arm and the retaining arm are advantageously arranged to be axially spaced apart from each other, such that a gap is formed between the support arm and the retaining arm respectively.

[0017] According to an advantageous variation of the plug connector, the retaining clip has at least two locking protrusions formed on the retaining arm and / or on the connecting section on the side opposite to the assembly direction. The locking protrusions advantageously project against the assembly direction, such that in the stopped position of the retaining clip, the locking protrusions can be radially supported against the inner peripheral wall of the through-hole relative to the through-hole. Specifically, when the mating plug connector is fully inserted into the plug connector, when a system pressure load is applied, the retaining clip moves axially against the assembly direction, such that the locking protrusions are positioned in the gap between the plug shaft and the peripheral wall of the through-hole. These locking protrusions prevent the retaining arm from radially expanding to its tensioned state and / or prevent the retaining clip from shifting from the stopped position to the inserted position. The locking protrusions prevent accidental loosening of the retaining clip or the mating plug connector.

[0018] Advantageously, the retaining clip is also designed such that when the mating connector is fully inserted, the retaining clip axially rests against the support surface of the clamp cage pointing in the assembly direction on the side opposite to the assembly direction, adjacent to the area of ​​the locking protrusion, and radially abuts against the peripheral wall of the through hole via the locking protrusion.

[0019] Particularly advantageous is that at least two locking protrusions on the retaining arm are designed to face each other. Here, the locking protrusions are preferably designed and arranged such that they are positioned on the axis of symmetry of the through-hole in the blocking position of the retaining clip and the stationary state of the retaining arm. The axis of symmetry of the through-hole is, in particular, an axis of symmetry extending perpendicular to the direction of movement of the retaining clip.

[0020] According to a variation of the invention, the cage has two windows that open radially to the through-hole. Reinforcing struts axially to the through-hole are advantageously arranged in the windows. Advantageously, the mating connector, and in particular the cage, is reinforced at least axially along the assembly direction by the reinforcing struts. This reinforcement also means that tensile or compressive loads are distributed more evenly around the periphery of the mating connector. In particular, this prevents leakage and damage.

[0021] In particular, in an advantageous embodiment of the invention, the retaining arm engages through the window, such that the retaining arm is arranged radially between the through-hole and the reinforcing strut. The retaining arm is advantageously arranged such that it extends into the through-hole of the cage when at rest.

[0022] Particularly advantageously, the base has four axial guide grooves distributed around its periphery, these axial guide grooves being arranged offset from each other by 90° and opening against the assembly direction. The reinforcing struts are advantageously constructed with radial protrusions relative to the cage, such that these reinforcing struts engage with the guide grooves to accommodate the cage in the receiving channel and to prevent torsion.

[0023] The reinforced support is advantageously designed with a socket, which ensures a favorable distance between the collar of the cage and the end of the base opposite to the assembly direction when the cage is assembled in the receiving channel.

[0024] In a preferred embodiment of the invention, both the sleeve section and the clamping cage have openings at least radially corresponding to the assembly direction. Specifically, with the clamping cage inserted into the sleeve section, the openings of the clamping cage and the sleeve section are arranged to align with each other, allowing a retaining clamp with support arms to be inserted radially through the openings of the clamping cage and the sleeve section into the through-hole of the clamping cage in the assembly direction. In particular, the arrangement of support arms engaging through the respective openings facilitates easy manufacturing and simple fixation of the clamping cage within the sleeve section of the base material.

[0025] The radially open window for arranging and supporting the retaining arm is advantageously arranged axially in the assembly direction and spaced apart from the opening for arranging and supporting the support arm. For simple and quick assembly of the retaining clip, especially for displacement between the blocking and insertion positions, it is particularly advantageous that the window and opening are arranged axially back-and-forth, especially without angular offset relative to the through hole. Advantageously, the support arm and retaining arm are correspondingly arranged axially back-and-forth on the retaining clip, such that the retaining arm and support arm are arranged axially offset respectively.

[0026] The clamp preferably has a radially outwardly pointing locking device. The support arm advantageously has a support groove corresponding to the locking device. Specifically, the locking device engages in the support groove in both the resting state of the support arm and the insertion position of the retaining clip. This advantageously ensures that, when the support arm is at rest, the locking device form-lockingly prevents displacement of the retaining clip from the insertion position to the blocking position.

[0027] According to a further improvement, the support arm has a radially inwardly pointing expansion device. With the retaining clip inserted and the support arm stationary, the expansion device advantageously extends into the through-hole, allowing the support arm to expand from a stationary state to a tensioned state when the mating connector is inserted in the assembly direction via the expansion device. Specifically, the mating shaft of the mating connector lifts the locking device out of the support groove, which advantageously releases any displacement of the retaining clip from the inserted position to the blocking position. This design improves safety by allowing the retaining clip to move to the blocking position in a pre-assembled or partially assembled state via an uninserted or incompletely inserted mating connector, and by preventing accidental insertion of the mating connector using the retaining clip.

[0028] Another variation specifies that the support groove is advantageously arranged behind the expansion device along the extension direction of the support arm. Specifically, a positioning groove is formed between the corresponding support groove and the corresponding expansion device. Preferably, in the resting state of the support arm and the blocking position of the retaining clip, the locking device of the clamp is arranged in the positioning groove, such that the expansion device is supported on the outer periphery of the mating connector, particularly the mating shaft of the mating connector, in a force-form locking manner, and advantageously generates resistance against displacement of the retaining clip from the blocking position to the insertion position. This resistance is particularly advantageous in preventing accidental release of the retaining clip from the blocking position to the insertion position. This could lead to uncontrollable release of the mating shaft from the through hole or displacement of the mating connector out of the through hole in a direction opposite to the assembly direction. This embodiment is therefore particularly advantageous in cases of high vibration and other external influences on the mating connection.

[0029] Advantageously, each support arm has at least one extended ramp that rises toward the free end of the support arm. Specifically, the extended ramps open above the support grooves. Preferably, the support grooves directly abut the extended ramps. Specifically, when the retaining clamp moves from the blocking position to the insertion position, the locking device can slide on the extended ramps, causing the support arm to elastically deform radially outward in a protective manner, and the locking device is lifted out of the positioning groove. Advantageously, this cooperatively overcomes obstruction between the locking device and the positioning groove.

[0030] As an alternative or supplement to the above embodiments, it has proven advantageous that one of the extended ramps rising toward the free end of the support arm opens above the positioning groove, and the positioning groove directly abuts the extended ramp. Specifically, when the retaining clip is moved from the blocking position to the insertion position, the extended ramp of the positioning groove supports the outer periphery of the mating connector, particularly the mating shaft of the mating connector, causing the support arm to elastically deform radially outward in a protective material manner, and the locking device is lifted out of the positioning groove. Advantageously, this cooperatively overcomes obstruction between the locking device and the positioning groove.

[0031] The advantage of the expanding ramps is that they deform radially elastically in coordination with the displacement of the support wall as the clamp moves radially relative to the through hole from the blocking position to the insertion position. Therefore, the blockage between the locking device and the positioning groove is designed as an overcoming resistance, and the dimensions are designed to be robust enough to prevent accidental changes in position. Specifically, the resistance to be overcome can be adjusted by adjusting the angle of each expanding ramp.

[0032] Another embodiment specifies that, viewed from the extension direction of the support arm, the support groove is arranged in front of the expansion device. Advantageously, in the stationary state of the support arm and in the inserted position of the retaining clamp, the locking device of the clamp is arranged in the support groove, thereby generating resistance against the retaining clamp moving from the inserted position to the blocked position.

[0033] According to an advantageous variation of the foregoing embodiments of the invention, each support arm has at least one extended ramp that rises toward the free end of the support arm. Specifically, the extended ramps open above the support grooves. The support grooves are preferably adjacent to the extended ramps. Alternatively or additionally, the extended ramps are formed on the expansion device. Preferably, in the resting state of the support arm and the blocking position of the retaining clip, the expansion device is capable of being force-form locked against the outer periphery of the mating connector, thereby generating resistance to the displacement of the retaining clip from the blocking position to the insertion position.

[0034] In a variation of the invention, each retaining arm has a radially outwardly opening retaining groove. Preferably, the retaining groove is designed to correspond to a blocking device of the clamp, such that the blocking device is arranged in the retaining groove in the tensioned state of the retaining arm and in the inserted position of the retaining clamp. The blocking device is advantageously arranged in the retaining groove such that displacement of the retaining clamp from the inserted position to the blocking position is prevented.

[0035] It has been proven advantageous for assembly safety that this design allows the retaining clip to move from the insertion position to the blocking position only when the mating connector and the mating shaft are fully positioned in the through hole. Specifically, when the locking groove of the mating connector is arranged adjacent to the retaining arm, the mating connector with the mating shaft is fully positioned in the through hole. When the mating connector with the mating shaft is fully inserted, the retaining arms, which have elastically deformed into a tensioned state, advantageously return to a stationary state, thereby positioning themselves in the locking groove. It is then advantageous that when the retaining arms are stationary, the blocking device is lifted out of the retaining groove, and the obstruction to the retaining clip's movement from the insertion position to the blocking position is eliminated. Since the retaining clip can only move from the insertion position to the blocking position when the retaining arms are stationary, the insertion status of the mating connector can be easily checked.

[0036] Preferably, the first groove wall of the retaining groove facing the free end of the retaining arm is formed by a support element that projects radially outward from the retaining arm. Specifically, in the stationary state of the retaining arm and the blocked position of the retaining clip, the support element is radially outward against the blocking device, thereby advantageously preventing the retaining arm from radially expanding to a tensioned state. In this state, it also advantageously prevents the retaining arm from transitioning from a stationary state to a tensioned state.

[0037] This variation of the invention advantageously prevents the mating connector from accidentally releasing from the through-hole after the retaining clip has been moved to the blocking position following full insertion of the mating connector into the through-hole. Specifically, to eliminate resistance to the elastic deformation of the retaining arm in the tensioned state, the retaining clip needs to be moved to the insertion position. In conjunction with the aforementioned advantageous embodiments, a synergistic effect is that the resistance generated by the expanding ramp must first be overcome in order to move the retaining clip to the insertion position. This thus provides the possibility of preventing the mating connector from undesirably shifting out of the through-hole against the assembly direction.

[0038] The support element is advantageously designed as a ramp element, wherein the ramp element preferably has an inclined surface that rises toward the free end of the retaining arm. The inclined surface advantageously opens into the first groove wall of the retaining groove. In particular, the inclined surface has manufacturing advantages.

[0039] In particular, the support element, preferably the ramp element, can be designed to correspond to the blocking device, such that the retaining arm is slightly elastically and radially inwardly compressed in a stationary state, such that the radial restoring force of the retaining arm presses the support element against the blocking device, for example, to avoid vibration and to prevent the components from colliding with each other.

[0040] The advantageous reinforcing struts are advantageously used as a blocking device, such that the reinforcing struts, designed as a blocking device, are advantageously arranged in the retaining groove in both the stationary state of the retaining arm and the insertion position of the retaining clamp. The effect is to increase the rigidity of the clamp cage while simultaneously improving the assembly safety of the plug connector.

[0041] According to a preferred embodiment of the invention, the retaining clip has at least one support arm. Variations with two or more support arms have also proven advantageous. The support arms are advantageously arranged between the support arms and are specifically designed to extend parallel to the support arms to the support head. In the stopped position of the retaining clip, the support head is advantageously arranged in a correspondingly designed head receiving portion in the outer periphery of the clip cage. The support head and the head receiving portion together form a stop, thereby preventing the retaining clip from radially displacing beyond the stopped position by the support head abutting against the head receiving portion. In particular, embodiments with two or more support arms have a corresponding number of head receiving portions.

[0042] In another improved embodiment of the plug-in connection, the retaining clip has at least one guide pin arranged between the retaining arms. Preferably, the guide pin is designed to extend parallel to the retaining arms to the support end. It has proven advantageous that, in the blocking position of the retaining clip, the guide pin rests its support end against the outer periphery of the clamp cage. Corresponding to the support arm, the guide pin, together with the outer periphery of the clamp cage, forms a stop, thereby preventing the retaining clip from radially displacing beyond the blocking position by the support head abutting against the head receiver.

[0043] For better assembly, and especially for better guidance of the retaining clip, the cage has a guide channel designed to correspond to the guide pin. Here, in the retaining clip's blocking position, the guide pin protrudes into the guide channel, preventing the retaining clip from twisting and / or wedging as it moves between the blocking and insertion positions.

[0044] The guide channel extends advantageously through two supports, which are preferably designed such that, when the cage is assembled in the receiving channel, the supports ensure a favorable distance between the collar of the cage and the end of the base pointing in the opposite direction to the assembly direction.

[0045] For easier disassembly, a preferred variant of the invention specifies that the retaining clip has at least one, and particularly two, opposing radially resilient clamping arms. The clamping arms advantageously extend from a section formed on the connecting section and / or the retaining arm toward the free end of the retaining arm. Specifically, each clamping arm is designed with end sections radially spaced from the retaining arm, such that the clamping arms can elastically deform toward the retaining arm by forces acting radially on the end sections. Specifically, to move the retaining clip from a blocking position to an insertion position, the clamping arms provide a preferred action profile for clamping by hand or with a tool.

[0046] It has proven particularly advantageous that the cage is held in the receiving channel in a form-locking manner by at least one, and particularly two, opposing locking arms. The locking arms are advantageously designed to be radially resilient and have radially outwardly projecting locking extensions. In the inserted state, the locking extensions advantageously engage in a form-locking manner with a recess in the peripheral wall of the sleeve section, thereby holding the cage in the sleeve section. For this purpose, the locking arms are preferably formed on the outer periphery of the cage.

[0047] Another alternative or additional embodiment for retaining the cage in the receiving channel specifies that the retaining clip between the support arms has at least one pin projecting radially toward the through-hole. Both the sleeve section and the cage here have at least one through-hole radially relative to the assembly direction. Advantageously, with the cage inserted into the sleeve section, the through-holes of the cage and sleeve section are arranged to align with each other, such that the retaining clip with the pin can be inserted radially in the assembly direction through the through-holes of the cage and sleeve section. In the position where the pin is inserted into the through-hole, the pin engages in a form-locking manner, causing the cage to move axially relative to the receiving channel.

[0048] Further advantageous embodiments of the invention are derived from the following description of the accompanying drawings and embodiments. Attached Figure Description

[0049] In the attached diagram: Figure 1 An exploded view of the plug connector according to the present invention is shown; Figure 2A perspective view of the clamp according to the present invention is shown; Figure 3 A perspective view of the retaining clip according to the present invention is shown; Figure 4 A cross-sectional view of a plug connector according to the invention is shown along the assembly direction, wherein the partially inserted mating plug connector is in a first assembly state, wherein the retaining clip is in the inserted position; Figure 5 It shows along Figure 4 A cross-sectional view of the dividing line AA; Figure 6 It shows along Figure 4 A cross-sectional view of the dividing line BB; Figure 7 A cross-sectional view of a plug connector according to the invention is shown along the assembly direction, wherein the partially inserted mating plug connector is in a second assembly state, wherein the retaining clip is in the inserted position; Figure 8 It shows along Figure 7 A cross-sectional view of the dividing line CC; Figure 9 It shows along Figure 7 A cross-sectional view of the dividing line DD; Figure 10 A cross-sectional view of the plug connector according to the invention is shown along the assembly direction, wherein the fully inserted mating plug connector is in a third assembly state, wherein the retaining clip is in the inserted position; Figure 11 It shows along Figure 10 A cross-sectional view of the dividing line EE; Figure 12 It shows along Figure 10 A cross-sectional view of the dividing line FF; Figure 13 A cross-sectional view of the plug connector according to the invention is shown along the assembly direction, wherein the fully inserted mating plug connector is in a fourth assembly state, wherein the retaining clip is in a blocking position; Figure 14 It shows along Figure 13 A cross-sectional view of the dividing line GG; Figure 15 It shows along Figure 13 A cross-sectional view of the dividing line HH; Figure 16 An exploded view of another plug connector according to the invention is shown; Figure 17 A perspective view of another clamping cage according to the invention is shown; Figure 18 A perspective view of another retaining clip according to the invention is shown; Figure 19 It shows Figure 1 A cross-sectional view of the plug connector according to the invention along the assembly direction, wherein the uninserted mating plug connector is in a first assembly state, wherein the retaining clip is in the inserted position; Figure 20 It shows along Figure 19 A sectional view of dividing line II; Figure 21 It shows along Figure 19 A cross-sectional view of the dividing line JJ; Figure 22 A cross-sectional view of a plug connector according to the invention is shown along the assembly direction, wherein the partially inserted mating plug connector is in a second assembly state, wherein the retaining clip is in the inserted position; Figure 23 It shows along Figure 22 A cross-sectional view of the dividing line KK; Figure 24 It shows along Figure 22 A cross-sectional view of the dividing line LL; Figure 25 A cross-sectional view of a plug connector according to the invention is shown along the assembly direction, wherein the partially inserted mating plug connector is in a third assembly state, wherein the retaining clip is in the inserted position; Figure 26 It shows along Figure 25 A cross-sectional view of the dividing line MM; Figure 27 It shows along Figure 25 A cross-sectional view of the dividing line NN; Figure 28 A cross-sectional view of a plug connector according to the invention is shown along the assembly direction, wherein the fully inserted mating plug connector is in a fourth assembly state, wherein the retaining clip is in the inserted position; Figure 29 It shows along Figure 28 A cross-sectional view of the dividing line OO; Figure 30 It shows along Figure 28 A cross-sectional view of the dividing line PP; Figure 31 A cross-sectional view of the plug connector according to the invention is shown along the assembly direction, wherein the fully inserted mating plug connector is in a fifth assembly state, wherein the retaining clip is in a blocking position; Figure 32 It shows along Figure 31 A cross-sectional view of the dividing line QQ; Figure 33 It shows along Figure 31 A cross-sectional view of the dividing line RR; Figure 34 It shows along Figure 31 A sectional view of the dividing line SS; Figure 35 A perspective view of another clamping cage according to the invention is shown; Figure 36 A perspective view of another retaining clip according to the invention is shown; Figure 37 A cross-sectional view of a mating connector according to the invention is shown along the assembly direction, wherein the fully inserted mating connector is free from system pressure loads. Figure 38 It shows that according to Figure 37 Detailed view of region T; Figure 39 A cross-sectional view of a mating connector according to the invention is shown along the assembly direction, wherein the fully inserted mating connector has a system pressure load; Figure 40 It shows that according to Figure 39 A detailed view of region V. Detailed Implementation

[0050] In the various figures of the accompanying drawings, the same parts always have the same reference numerals.

[0051] Regarding the following description, the present invention is not limited to the embodiments, nor is it limited to all or some of the features in the combination of features. Rather, each individual partial feature of each embodiment is also important to the purpose of the invention, these features being independent of all other partial features associated with them, and also in combination with any features of another embodiment.

[0052] Figure 1 and Figure 16 The diagram shows mating connectors 1 and 101 for connecting a first fluid line to a mating mating connector 2. The mating mating connector 2 is specifically designed for... Figure 4 , 7 Models 10, 13, 19, 22, 25, 28, 31, 34, 37 and 39 are shown together with plug connectors 1, 101 and 201.

[0053] Connectors 1, 101, and 201 have Figure 1 , 16 The substrates 4, 104, and 204 with through channels 6, 106, and 206 shown in 37 and 39. Specifically, as... Figure 4 , 19 As shown in 22 and 37, through channels 6, 106, 206 are fluidly connected to the ends of the sleeve sections 8, 108, 208 of the substrates 4, 104, 204.

[0054] Cages 12, 112, and 212 are arranged in receiving channels 10, 110, and 210 of sleeve sections 8, 108, and 208, respectively. Cages 12, 112, and 212 are detachably arranged in receiving channels 10, 110, and 210. Cages 12, 112, and 212 are specifically shown in... Figure 2 , 17 And 35. For example Figure 1 and 16 As shown, clamps 12, 112, and 212 can be inserted into the receiving channels 10, 110, and 210 of sleeve sections 8, 108, and 208 along the assembly direction M, and are held axially relative to the assembly direction M in a form-locking manner.

[0055] Cages 12, 112, and 212 can be inserted perpendicularly to the assembly direction M into the two retaining arms 18, 118, and 218 of the retaining clips 20, 120, and 220 of the cages 12, 112, and 212, and held in the through holes 16, 116, and 216 of the sleeve sections 8, 108, and 208. The retaining clips 20, 120, and 220 are as follows: Figure 1 , 3 As shown in 16, 18 and 36.

[0056] The retaining arms 18, 118, and 218 of the retaining clips 20, 120, and 220 are designed to extend parallel to each other and protrude into the through holes 16, 116, and 216 of the cages 12, 112, and 212 when the retaining clips 20, 120, and 220 are in a stationary state. Furthermore, the retaining arms 18, 118, and 218 are designed to be radially and elastically expandable to a tensioned state within the through holes 16, 116, and 216.

[0057] The retaining clips 20, 120, and 220 are designed to be radially oriented relative to the through holes 16, 116, and 216, particularly from... Figure 5 , 6 The insertion positions shown in 1, 8, 9, 11, 12, 20, 21, 23, 24, 26, 27, 29, and 30 are shifted to, as shown in 1, 2, 30. Figure 14 , 15 The blocking positions shown in 32, 33, and 39, and the positions shifted from the blocking positions to the insertion positions.

[0058] In the inserted positions of retaining clips 20, 120, and 220, retaining arms 18, 118, and 218 can expand to their tensioned state. Furthermore, as... Figure 14 and Figure 32 As shown, retaining arms 18, 118, and 218 are blocked in the blocking position of retaining clamps 20, 120, and 220 to prevent expansion into a tensioned state.

[0059] According to the present invention, retaining clips 20, 120, 220 have particularly such Figure 3 ,6 Two radially resilient support arms 22, 122, and 222, shown in figures 9, 12, 15, 18, 21, 24, 27, 30, and 33, 36, are specifically designed to be elastically attached to the through holes 16, 116, and 216. The support arms 22, 122, and 222 here fix the cages 12, 112, and 212 axially along the assembly direction M in a form-locking manner within the receiving channels 10, 110, and 210 of the sleeve sections 8, 108, and 208, and according to the invention, the support arms 22, 122, and 222 extend into the through holes 16, 116, and 216 of the cages 12, 112, and 212 in a stationary state. Furthermore, as... Figure 9 , 12 As shown in 27 and 30, the support arms 22, 122, 222 are designed to expand radially elastically to a tensioned state relative to the through holes 16, 116, 216, as part of the present invention.

[0060] Advantageously, when the support arms 22, 122, 222 are in a stationary state and the retaining clips 20, 120, 220 are in the insertion position, the retaining clips 20, 120, 220 are prevented from shifting from the insertion position to the blocking position. This embodiment is specifically shown in Figure 6 , 21 and 23 in.

[0061] Preferably, when the retaining arms 18, 118, and 218 are in a tensioned state and the retaining clips 20, 120, and 220 are in the insertion position, the retaining clips 20, 120, and 220... Figure 8 , 23 As shown in Figure 26, the object is blocked from shifting from the insertion position to the blocking position.

[0062] like Figure 15 , 33 As shown in Figure 39, when the support arms 22, 122, 222 are stationary and the retaining clips 20, 120, 220 are in the blocking position, the retaining clips 20, 120, 220 are force-shaped locked and prevented from moving from the blocking position to the insertion position.

[0063] In one specific embodiment of the present invention, the retaining clips 20, 120, and 220 are U-shaped, such as... Figure 3 , 18 As shown in Figure 36, the support arms 22, 122, 222 and the retaining arms 18, 118, 218 are advantageously connected via connecting sections 24, 124, 224 and extend in the same direction, preferably extending from the connecting sections 24, 124, 224 to a free end. Specifically, the support arms 22, 122, 222 and the retaining arms 18, 118, 218 are arranged axially spaced apart from each other. Figure 3 , 18As shown in Figures 36 and 37, the gaps are preferably formed between the retaining arms 18, 118, 218 and the axially offset support arms 22, 122, 222, respectively, and the gaps extend from the free ends to the connecting sections 24, 124, 224, respectively.

[0064] Maintaining the advantageous variations of clamps 120 and 220, especially in Figure 16 and 36 As shown in the figure. The retaining clips 120, 220 advantageously have at least two locking protrusions 274 on the side facing the opposite direction of the assembly direction M, said at least two locking protrusions being formed on the retaining arms 118, 218 and / or the connecting sections 124, 224. Figure 16 A preferred variant with two locking protrusions 174 on the connecting section 124 is shown as an example. Figure 36 The extended embodiment shown as an example, in addition to the two locking protrusions 274 on the connecting section 224, also has two additional locking protrusions 274 on the retaining arm 220. Furthermore, it can be configured such that three locking protrusions 274 are arranged on the connecting section 224 and two locking protrusions 274 are arranged on the retaining arm 218, as shown below. Figure 36 As shown.

[0065] The press-locking protrusions 174 and 274 are advantageously designed to protrude against the assembly direction M, such that in the blocking position of the retaining clips 120 and 220, the press-locking protrusions 174 and 274 can be radially supported on the inner peripheral wall of the through holes 116 and 216.

[0066] Specifically, the two locking protrusions 274 on the retaining arm 218 are designed and arranged opposite to each other, such that the locking protrusions 274 are arranged on the axis of symmetry of the through hole 216 in the blocking position of the retaining clip 220 and the stationary state of the retaining arm 218. The axis of symmetry is inside the through hole 216 and extends particularly perpendicular to the displacement direction of the retaining clip 220.

[0067] To prevent radial displacement of the retaining clips 120, 220 from the blocking position to the insertion position and / or radial expansion of the retaining arms 118, 218, especially under system pressure loads generated by the supplied fluid during operation, the pressure-locking protrusions 174, 274 have proven particularly advantageous. Specifically, when the mating connector 2 is fully inserted into the connectors 101, 201, under system pressure loads, the retaining clips 120, 220 move axially against the assembly direction, such that the pressure-locking protrusions 174, 274 are arranged in the gap between the connector shaft 14 and the peripheral walls of the through holes 116, 216. Figure 39 and 40As shown, the locking protrusions 174, 274 prevent the retaining arms 118, 218 from radially expanding to their tensioned state and / or prevent the retaining clips 120, 220 from shifting from the blocking position to the insertion position. The locking protrusions 174, 274 prevent accidental loosening of the retaining clips 120, 220 or the mating connector 2.

[0068] like Figure 39 and 40 As shown, the retaining clip 220 is also advantageously designed such that when the mating connector 2 is fully inserted and under system pressure, the retaining clip 220 axially rests against the support surface of the cage pointing in the assembly direction M through the area adjacent to the locking protrusion 274 on the side opposite to the assembly direction M, and radially abuts against the peripheral wall of the through hole 216 through the locking protrusion 274.

[0069] It has proven advantageous that the dimensions of the substrates 104, 204 or the clamps 112, 212 are designed to have an insertion path for the insertion shaft 14. The insertion path U is... Figure 37 and Figure 39 The reference numerals are exemplarily marked. Furthermore, retaining clips 120, 220 advantageously have axial clearance relative to clamps 112, 212. Preferably, the axial clearance corresponds at least to the range of the locking protrusions 174, 274 in the axial direction.

[0070] For assembly purposes, retaining clips 120 and 220 can be moved from the insertion position to the blocking position by maintaining clearance between retaining clips 120 and 220 and clamps 112 and 212. When the mating connector 2 is fully inserted into the through holes 116 and 216 and a locking connection is established with the fully locked position of the mating connector 2 by retaining arms 118 and 218, the mating connector 2 can be moved by a restoring force acting on the mating connector 2 in the opposite direction of assembly M, moving the retaining clips 120 and 220 along their respective insertion paths U in the opposite direction of assembly M via retaining arms 118 and 218. Figure 37 and Figure 38 The diagram shows the state in which the mating connector 2 is fully inserted into the mating connector, including the insertion path U. Figure 39 and 40 The diagram shows the state after a restoring force pointing in the opposite assembly direction M is applied to the mating connector 2, and the mating connector 2 moves the retaining clip 220 axially in the opposite assembly direction M according to the clearance between the retaining clip 220 and the cage 212. The restoring force can be generated intentionally during assembly or can be generated by system pressure during operation.

[0071] Advantageously, due to the axial displacement of retaining clamps 120, 220, such as Figure 39 and 40As shown, the locking protrusions 174 and 274 are arranged radially adjacent to the inner peripheral walls of the through holes 116 and 216 and block radial displacement of the retaining clips 120 and 220 and radial expansion of the retaining arms 118 and 218. To release the locking connection or blockage caused by the locking protrusions 174 and 274, a mating connector 2 is used... Figure 37 and Figure 38 As shown, the clamping protrusions 174, 274 are advantageously moved to the insertion position along the assembly direction M at least along their axial length, such that the inner peripheral walls of the clamping protrusions 174, 274 and the through holes 116, 216 do not overlap. The elastic deformation of the retaining arms 118, 218 and the radial displacement of the retaining clips 120, 220 are released again.

[0072] In a particular embodiment of the retaining clip 220, a locking pin 280 radially pointing towards the through hole 216 is formed on the connecting section 224, such that when the retaining clip 220 is in its blocking position, the locking pin 280 engages in the retaining groove of the mating plug connector 2 fully inserted into the plug connectors 101, 201, and M-shaped locking the mating plug connector 2 in a reverse assembly direction. This embodiment of the retaining clip 220 with the locking pin 280... Figure 36 As shown in the example. Advantageously, at least one locking protrusion 274 is positioned on the locking pin 280 in the opposite direction of the assembly direction M. Specifically, when the form-fitting connector 2 is prevented from moving in the opposite direction of the assembly direction M, the locking pin 280 increases the holding force of the retaining clip 220 and reduces the load on the locking arm 218.

[0073] like Figure 2 , 17 As shown in Figure 35, in a preferred variant, the cages 12, 112, 212 have two windows 26, 126, 226 opening radially to the through holes 16, 116, 216. Furthermore, preferably, reinforcing struts 28, 128, 218 extending axially to the through holes 16, 116, 216 are arranged in the windows. Corresponding to advantageous embodiments, such as... Figure 5 , 8 As shown in 11, 14, 20, 23, 26, 29, and 32, retaining arms 18, 118, and 218 engage through windows 26, 126, and 226, such that retaining arms 18, 118, and 218 are radially arranged between through holes 16, 116, and 216 and reinforcing supports 28, 128, and 228. Specifically, retaining arms 18, 118, and 218 extend into the through holes 16, 116, and 216 of the cages 12, 112, and 212, at least in a stationary state, as... Figure 11 , 14 Examples are shown in 20, 29, and 32.

[0074] Particularly advantageously, the base 4 has four axial guide grooves 27 distributed on its periphery, these axial guide grooves being arranged offset from each other by 90° and opening against the assembly direction M. The reinforcing strut 28 is advantageously designed to have radial protrusions from the cage 12, such that the reinforcing strut 28 engages in the guide grooves 27 to arrange the cage 12 in the receiving channel 10 and to prevent torsion.

[0075] The reinforcing support 28 is advantageously designed with a socket 29, such that when the cage 12 is assembled in the receiving channel 10, the socket 29 ensures an advantageous distance between the collar of the cage 12 and the end of the base 4 opposite to the assembly direction M.

[0076] Another advantageous embodiment of the plug connectors 1, 101, 201 is in Figure 6 , 9 Figures 12, 15, 21, 24, 27, 30, 33, and 35 are shown. According to this alternative embodiment, sleeve sections 8, 108, 208 and cages 12, 112, 212 each have at least two openings 30, 130, 230 radially relative to the assembly direction M. According to the illustrated embodiment, the openings 30, 130, 230 of the cages 12, 112, 212 and sleeve sections 8, 108, 208 are preferably arranged aligned with each other in the sleeve sections 8, 108, 208, respectively, when the cages 12, 112, 212 are inserted. The openings 30, 130, and 230 are advantageously arranged relative to each other such that the retaining clamps 20, 120, and 220 and the support arms 22, 122, and 222 are inserted radially into the through holes 16, 116, and 216 of the clamps 12, 112, and 212 through the openings 30, 130, and 230 of the sleeve sections 8, 108, and 208 in the assembly direction M.

[0077] Figure 2 , 17 Figures 35 and 36 show a preferred variant of the invention, according to which the radially open windows 26, 126, 226 for arranging and supporting the retaining arms 18, 118, 218 are arranged axially in the assembly direction M and spaced apart from the openings 30, 130, 230 for arranging and supporting the support arms 22, 122, 222. The windows 26, 126, 226 and the openings 30, 130, 230 are preferably arranged axially back and forth around the through-hole, particularly without angular offset.

[0078] Another alternative embodiment is shown in Figure 3 , 6In numbers 9, 12, 15, 21, 24, 27, 30, and 33, the clamps 12 and 112 advantageously have radially outwardly pointing locking devices 32 and 132. Specifically, the support arms 22, 122, and 222 have support grooves 34, 134, and 234 that open radially inwardly corresponding to the locking devices 32 and 132. In the resting state of the support arms 22, 122, and 222 and in the inserted position of the retaining clips 20, 120, and 220, the locking devices 32 and 132 advantageously engage in the support grooves 34, 134, and 234. When the support arms 22, 122, and 222 are in the resting state, the locking devices 32 and 132 advantageously prevent the retaining clips 20, 120, and 220 from shifting from the inserted position to the blocked position in a form-locking manner. Figure 6 , 21 Figures 24 and 25 show the support arms 22, 122, 222 of this variant according to the invention in the inserted position of the retaining clips 20, 120. Specifically, Figure 36 The cage 212 shown and Figure 35 The retaining clip 220 shown can be designed according to this embodiment.

[0079] In a further improved embodiment, the support arms 22, 122, 222 advantageously have radially inwardly pointing expansion devices 36, 136, 236. This embodiment is specifically shown in Figure 3 , 6 In numbers 9, 21, 24, 27, 30, 33, and 36. While maintaining the insertion positions of clamps 20, 120, and 220 and the stationary states of support arms 22, 122, and 222, as... Figure 6 , 21 As shown in Figure 24, the expansion devices 36, 136, and 236 extend into the through holes 16, 116, and 216, respectively, so that when the mating connector 2 is inserted, the support arms 22, 122, and 222 can expand from a static state to a tensioned state along the assembly direction M via the expansion devices 36, 136, and 236. The support arms 22 and 122 in the clamped state are as follows... Figure 9 , 12 As shown in 27, 30 and 33.

[0080] Based on the preferred response to the radial elastic expansion of the support arms 22, 122, and 222 into a tensioned state, particularly from Figure 9 , 12 As can be seen in 27 and 30, the locking devices 32 and 132 are lifted out of the support slots 34, 134 and 234. In particular, this advantageously releases the displacement of the retaining clips 20, 120 and 220 from the insertion position to the blocking position.

[0081] Another embodiment of the invention specifies that the support groove 34 is arranged behind the expansion device along the extending direction of the support arm 22. For example, this arrangement can be achieved from... Figure 3 As can be seen, the positioning groove 38 is advantageously formed between the corresponding support groove 34 and the corresponding expansion device 36. Advantageously, the locking device 32 of the clamp 12 is arranged in the positioning groove 38 in the stationary state of the support arm 22 and in the blocking position of the retaining clamp 20, such that the expansion device 36 is supported, in particular, on the outer periphery of the mating plug connector 2, especially the plug shaft 14, in a force-locking manner. Figure 15 This preferred arrangement of the locking device 32 and the expansion device 36 in the positioning groove 38 in their supporting function on the outer periphery of the insertion shaft 14 is shown in particular advantageously. In this embodiment, the expansion device 36, which is supported on the outer periphery in a force-shape locking manner, particularly advantageously generates resistance to the displacement of the retaining clip 20 from the blocking position to the insertion position.

[0082] In particular, such as Figure 3 , 6 As shown in examples 9, 12 and 15, each support arm 22 has at least one extended ramp 40a, 40b that rises toward the free end of the support arm 22. The extended ramp 40a advantageously opens above the support groove 34, and the support groove 34 is preferably directly adjacent to the extended ramp 40a.

[0083] Optionally or additionally, the extended ramp 40b opens above the locating slot 38. According to a similarly preferred variation, the locating slot 38 is directly adjacent to the extended ramp 40b. Figure 3 , 6 An extended ramp 40b adjacent to the positioning groove 38 is also shown in 9, 12 and 15.

[0084] In an alternative embodiment, the support grooves 134 and 234 are arranged in front of the expansion devices 136 and 234 along the extending direction of the support arms 122 and 222. Specifically, this embodiment... Figure 21 , 24 As shown in 27, 30, 33 and 36. In the stationary state of the support arms 122, 222 and in the inserted position of the retaining clamps 120, 220, the locking device 132 of the clamps 112, 212 is advantageously arranged in the support grooves 134, 234, as... Figure 21 and 24 As shown, this generates resistance to the displacement of retaining clips 120 and 220 from the insertion position to the blocking position.

[0085] Particularly advantageously, the support arms 122 and 222 preferably each have at least one extended ramp 140a and 140b that rises toward the free end of the support arms 122 and 222. This embodiment... Figure 21 , 24Examples are shown in 27, 30, and 33. Specifically, the expansion ramp 140a opens above the support grooves 134, 234, and the support grooves 134, 234 are adjacent to the expansion ramp 140a. Additionally or alternatively, the expansion ramp 140b is formed on the expansion devices 136, 236, particularly in the resting state of the support arms 122, 222 and the blocking position of the retaining clamps 120, 220, as shown in 27, 30, and 33. Figure 33 As shown, the expansion devices 136 and 236 are supported on the outer periphery of the mating connector 2 in a force-shape locking manner. This advantageously generates resistance to the displacement of the retaining clips 120 and 220 from the blocking position to the insertion position. Specifically, Figure 36 The cage 212 shown and Figure 35 The retaining clip 220 shown can be designed according to this embodiment.

[0086] Advantageously, the support arms 122, 222 are designed such that the extension devices 136, 236 of the support arms 122, 222, such as Figure 21 , 24 Examples 27, 30, and 33 exemplarily show that, at least in the insertion positions of the retaining clips 120 and 220, they are arranged behind the central axes of the through holes 116 and 216, respectively, in a direction pointing towards the free ends of the support arms 122 and 222. Specifically, as... Figure 27 , 30 As shown in Figure 33, when the mating connector 2 is inserted into the through holes 116 and 216, the expansion devices 136 and 236 are supported on the plug shaft 14 of the mating connector 2, causing the plug shaft 14 to be snapped back by the support arms 122 and 222. Due to the restoring force generated by radial elastic deformation, the expansion devices 136 and 236 press against the plug shaft 14 and generate a displacement force, which pushes the connecting sections 124 and 224 of the retaining clips 120 and 220 along the central axis. Specifically, the generated displacement force has the effect that once the plug shaft 14 is fully arranged in the through holes 116 and 216 and the retaining arms 118 and 218 protrude into the locking groove of the mating connector 2 in a stationary state, the retaining clips 120 and 220 automatically move from the insertion position to the blocking position. Figure 36 The cage 212 shown and Figure 35 The retaining clip 220 shown can be designed according to this embodiment.

[0087] Furthermore, it is advantageous for assembly and operational safety if the retaining arms 18, 118, and 218 each have radially outwardly opening retaining grooves 42, 142, and 242. The retaining grooves 42, 142, and 242 are preferably designed to correspond to the blocking devices 44, 144, and 244 of the clamps 12, 112, and 212, such that the blocking devices 44, 144, and 244 are arranged in the retaining grooves 42, 142, and 242 in the tensioned state of the retaining arms 18, 118, and 218 and in the inserted position of the retaining clamps 20, 120, and 220. Figure 5 , 8 In numbers 11, 14, 20, 23, 26, 29, and 32, retaining grooves 42, 142 and blocking devices 44, 144 are shown in different positions relative to each other, wherein, in particular, Figure 5 , 8 Figures 23 and 26 illustrate how the blocking devices 44 and 144 are arranged in the retaining grooves 42 and 142, and specifically perform the function of blocking the retaining clips 20 and 120 from the insertion position to the blocking position. In this respect, when the retaining arms 18, 118, and 218 are in the tensioned state and the retaining clips 20, 120, and 220 are in the insertion position, the blocking devices 44, 144, and 244 are advantageously arranged in the retaining grooves 42, 142, and 242, such that the displacement of the retaining clips 20, 120, and 220 from the insertion position to the blocking position is blocked.

[0088] In an optional variation of the invention, intentionally, the first groove wall of the retaining grooves 42, 142, 242 is designed to extend from the support elements 46, 146, 246 toward the free ends of the retaining arms 18, 118, 218, the support elements projecting radially outward from the retaining arms 18, 118, 218. This variation is advantageously shown in Figure 3 , 5 , 8, 11, 14, 18, 20, 23, 26, 29, 32 and 36.

[0089] In particular, such as Figure 14 and 32 As shown, in the stationary state of the retaining arms 18, 118, 218 and the blocking position of the retaining clips 20, 120, 220, the support elements 46, 146, 246 are radially outwardly directed from the through holes 16, 116, 216 and abut against the blocking devices 44, 144, 244, thereby advantageously preventing the radial expansion of the retaining arms 18, 118, 218 and the transfer of the retaining arms 18, 118, 218 from the stationary state to the tension state.

[0090] Figure 3 , 5Figures 8, 11, 14, 18, 20, 23, 26, 29, 32, and 36 also show further improvements to support elements 46, 146, and 246, according to which support elements 46, 146, and 246 are designed as ramp elements. The ramp elements have inclined surfaces 48, 148, and 248 that rise toward the free ends of the corresponding retaining arms 18, 118, and 218, which offer manufacturing advantages.

[0091] Figure 5 , 8 A specific combination of features is shown in 11, 14, 20, 23, 26, 29, 32, and 35, and it is specified that reinforcing struts 28, 128, and 228 serve as blocking devices 44, 144, and 244. Specifically, this embodiment synergistically improves assembly and operational safety and increases the rigidity of clamps 12, 112, and 212, which also contributes to (leakage) safety. In the advantageous manner described above, the reinforcing struts 28, 128, and 228, designed as blocking devices 44, 144, and 244, are arranged in retaining grooves 42, 142, and 242 in the stationary state of retaining arms 18, 118, and 215 and in the insertion position of retaining clamps 20, 120, and 220.

[0092] Another alternative embodiment is shown in Figure 3 , 6 In 9, 12, and 15, the retaining clip 20 has at least one, particularly two, support arms 50. The illustrated embodiments all have two support arms 50. The support arms 50 are preferably arranged between the support arms 22 and are specifically designed to extend parallel to the support arms 22 to the support heads 52. It has proven advantageous, according to suitable embodiments, that in the blocking position of the retaining clip 20, the corresponding support heads 52 are arranged in correspondingly designed head receiving portions 54 in the outer periphery of the clamp 12. Particularly advantageously, Figure 15 This illustrates how, in the blocking position of the retaining clip 20, the two support arms 50 are supported by their support heads 52 within the correspondingly designed head receiver 54. In a preferred improvement, corresponding to Figures 16 to 40 The modified plug connectors 101 and 202 shown may also have the features of this embodiment.

[0093] As an alternative or supplement to one of the above embodiments, the retaining clip 20 advantageously has at least one guide pin 56. The guide pin 56 in... Figure 3 , 5 Particularly advantageously shown in figures 8, 11, and 12. As shown, guide pin 56 is preferably arranged between retaining arms 18 and advantageously designed to extend parallel to the retaining arms 18 to the support end. It has been shown that in the blocking position of retaining clip 20, guide pin 56 rests with its support end against the outer periphery of clamp 12, which is advantageous for assembly safety. This embodiment also corresponds to plug connectors 101 and 201. Figures 16 to 40 The embodiments shown are used for combination.

[0094] According to further improvements of the present invention, particularly from Figure 14 As can be seen, the clamp 12 has a guide channel 58 designed to correspond to the guide pin 56. The guide pin 56 preferably engages radially into the guide channel 58, at least in the blocking position of the retaining clamp 20, via the through hole 16. This embodiment can also correspond to the plug connectors 101 and 202. Figures 16 to 40 The embodiments shown are used for combination.

[0095] The guide channel 58 advantageously extends through the two support seats 59. Specifically, the support seats 59 are as follows: Figure 2 As shown. The support 59 is advantageously designed to ensure a favorable distance between the collar of the cage 12 and the end of the base 4 opposite to the assembly direction M, when the cage 12 is assembled in the receiving channel 10. This embodiment can also correspond to the plug connectors 101 and 202. Figures 16 to 40 The embodiments shown are used for combination.

[0096] Particularly advantageous, such as Figure 4 , 7 As shown in figures 10, 13, 19, 22, 25, 28, 31, and 34, at least one sealing element 60, 160, particularly an O-ring, is arranged in receiving channels 10, 110. Preferably, according to an embodiment not shown, two sealing elements 60, 160 are arranged in receiving channels 10, 110. In particular, Figure 37 and Figure 39 The plug connector 201 shown can be designed according to this embodiment.

[0097] Sealing elements 60 and 160 are advantageously arranged between the sidewalls of the cages 12 and 112 that point toward the assembly direction M and the stepped surfaces that point toward and extend circumferentially from the inner walls of the receiving channels 10 and 110 in the opposite direction of the assembly direction M.

[0098] Sealing elements 60 and 160 are particularly advantageous for circumferential sealing of the insertion shaft 14 relative to the inner wall of the sleeve sections 8 and 108 or the receiving channels 10 and 110.

[0099] The three-part seal (not shown) has proven particularly advantageous. Thus, the seal advantageously has two sealing elements 60, 160, particularly O-rings, which are separated from each other by spacer rings. This three-part assembly is advantageously assembled in the receiving channels 10, 110 in the manner described above.

[0100] According to special Figure 18 , 20In the preferred embodiment of the invention shown in 23, 26, 29, 32 and 36, the retaining clips 120, 220 have at least one, particularly two, opposing radially resilient clamping arms 166, 266. The clamping arms 166, 266 extend from sections formed on the connecting sections 124, 224 and / or the retaining arms 118, 218 toward the free ends of the retaining arms 118, 218. The clamping arms 166, 266 are advantageously radially spaced from the retaining arms 118, 218 by means of their end sections, and in particular, such that the clamping arms 166, 266 can elastically deform toward the retaining arms 118, 218 by means of forces acting radially on their end sections. The clamping arms 166, 266 here improve the clamping of the retaining clips 120, 220, which is particularly advantageous for transferring the retaining clips 120, 220 from a blocking position to an insertion position. Embodiments of the invention having clamping arms 166, 266 can also be advantageously combined with… Figures 1 to 15 An exemplary embodiment of the plug connector 1 shown is combined.

[0101] Specifically, the clamps 112 and 212 are held in a form-locking manner by at least one radially resilient locking arm 168 and 268, the locking arm having radially outwardly projecting locking extensions 170 and 270, which, in the inserted state, form-lockingly engage with a recess 172 in the peripheral wall of the sleeve sections 108 and 208. This embodiment of the clamps 112 and 212 is particularly characterized in... Figure 17 and 35 As shown in the figure. Here, locking arms 168, 268 are advantageously formed on the outer periphery of clamps 112, 212.

[0102] Specifically, in a preferred variant of the invention, the clamp 112 is held in a form-locking manner by at least two radially resilient locking arms 168, each locking arm having a radially outwardly projecting locking extension 170, which, in the inserted state, engages in a form-locking manner with a recess 172 in the peripheral wall of the sleeve section 108. This embodiment corresponds to Figure 17 The illustrated cage 112 is a variant of the embodiment. A suitable plug connector 101 is provided as an example. Figure 1 As shown, this embodiment of the invention can also be advantageously combined with... Figures 1 to 15 An exemplary embodiment of the plug connector 1 shown is incorporated. Specifically, a locking arm 168 is formed on the outer periphery of the clamp 112.

[0103] Another advantageous embodiment for arranging the cage 212 in the sleeve section 208 specifies that the retaining clip 220 located between the support arms 222 has at least one pin 276 projecting radially toward the through hole 216, wherein the sleeve section 208 and the cage 212 each have at least one through opening radially relative to the assembly direction M. These embodiments of the cage 212 and the retaining clip 220 are specifically shown in Figure 35 and 36 Advantageously, with the clamp 212 inserted into the sleeve section 208, the through openings of the clamp 212 and the sleeve section 208 are arranged to align with each other, specifically, such that the retaining clamp 220 with pin 276 can be inserted radially in the assembly direction M through the through openings of the clamp 212 and the sleeve section 208. A specific implementation of pin 276 is, for example... Figure 36 As shown. In this embodiment, the locking pin 280 is arranged to be axially offset from the pin 276 relative to the assembly direction.

[0104] A favorable variant provision, such as Figure 35 As shown, the clamp 212 has a radially elastic locking arm 268 formed radially opposite to the through hole 216 and the through opening. The locking arm has a locking extension 270 that protrudes radially outward on the outer periphery. In the inserted state, the locking extension is locked into the recess in the peripheral wall of the sleeve section 208 in a form-locking manner.

[0105] The following uses Figures 4 to 15 and Figures 19 to 34 The advantageous embodiment shown illustrates the insertion and assembly of the mating connector 2. Because... Figures 35 to 40 The insertion and assembly process of the modified clamp 212 and retaining clip 220 of the plug connector 201 shown is consistent with that according to Figures 19 to 34 The insertion and assembly processes are the same, so illustrations are omitted.

[0106] Figures 19 to 21 A plug connector 101 is shown with an unassembled mating plug connector 2 and a retaining clip 20 in the inserted position. The retaining arm 118 and the support arm 122 are both stationary here. Specifically, the support arm 122 engages with the locking device 132 of the cage 112 to prevent the retaining clip 120 from shifting from the inserted position to the blocked position. Simultaneously, the retaining clip 120 is secured to prevent it from falling out of the base 104 and / or the cage 112. These conditions also apply to the plug connector 1 with the unassembled mating plug connector 2, corresponding to… Figures 16 to 34 The example shown.

[0107] Figures 4 to 6 and Figures 22 to 24The diagram shows mating connectors 1 and 101, wherein a mating connector 2 is partially inserted along the assembly direction M, and retaining clips 20 and 120 are in the inserted position. During insertion, the mating connector 2 is inserted into through holes 16 and 116 along the assembly direction M using its mating shaft 14. This mating shaft 14 passes through a section in the through holes 16 and 116, wherein retaining arms 18 and 118 extend into the through holes 16 and 116, as shown. Figures 4 to 6 and Figures 22 to 24 As shown. The insertion shaft 14 and retaining arms 18, 118 are advantageously designed to correspond to each other, such that the insertion shaft 14 applies a force radially outward along the assembly direction M to the retaining arms 18, 118. Alternatively, the side pointing against the assembly direction M may have an insertion ramp that increases in the insertion direction for better insertion of the insertion shaft 14. Due to the outward force, the retaining arms 18, 118 and the support arms 22, 122 each elastically deform radially outward from a rest state to a tensioned state.

[0108] Figure 5 and Figure 23 The image shows that the retaining arms 18, 118 are in a tensioned state in this condition. Here, advantageous blocking devices 44, 144 are arranged in the retaining grooves 42, 142 of the retaining arms 18, 118 and prevent the retaining clips 20, 120 from moving from the insertion position to the blocking position. Figure 6 and Figure 24 The diagram shows that the support arms 22, 122 are stationary in this state. Furthermore, advantageous locking devices 32, 132 of the cages 12, 112 are arranged in the support grooves 34, 134 of the support arms 22, 122, and also prevent the retaining clips 20, 120 from moving from the insertion position to the blocking position, while simultaneously ensuring that the retaining clips do not fall out of the bases 4, 104 and / or the cages 12, 112.

[0109] like Figures 7 to 9 and Figures 25 to 27 As shown, the mating connector 2 has moved further along the assembly direction M into the through holes 16, 116 of the clamps 12, 112, and has passed through the sections where the support arms 22, 122 are inserted into the through holes 16, 116. The retaining clips 20, 120 are still in the inserted position. Figure 8 and 26 This shows that the retaining arms 18 and 118 remain unchanged in the tensioned state. Figure 9 and Figure 27The diagram shows that at this assembly point, the insertion shaft 14 applies a force radially outward along the assembly direction M to the support arms 22, 122. Due to the outward force, the support arms 22, 122 elastically deform radially outward from a rest state to a tensioned state. Specifically, the elastic deformation is facilitated by the expansion devices 36, 136 protruding into the through channels 6, 106. Due to the elastic deformation, the locking devices 32, 32 on the clamps 12, 112 are lifted out of the support grooves 34, 134, thereby releasing the radial obstruction holding the clamps 20, 120 on the portions of the support arms 22, 122.

[0110] like Figures 10 to 12 and Figures 28 to 30 As shown, the mating connector 2 has moved further along the assembly direction M into the through holes 16, 116 of the clamps 12, 112, and has reached its final position. The retaining clips 20, 120 are still shown in the inserted position. At the end position of the mating connector 2, the locking grooves arranged behind the plug shaft 14 are positioned adjacent to the retaining arms 18, 118 of the retaining clips 20, 120. Figure 11 and 29 As shown, retaining arms 18 and 118 are relaxed into the locking grooves, causing the mating connector 2 to be form-locked by the retaining arms 18 and 118 axially in the assembly direction M, and the obstruction between the blocking devices 44 and 144 and the retaining grooves 42 and 142 is released. Figure 12 and Figure 30 As shown, the support arms 22 and 122 remain in a tensioned state, and the obstruction between the locking devices 32 and 132 and the support grooves 34 and 134 is removed. Specifically, in this assembled state, the retaining clips 20 and 120 can be moved from the insertion position to the blocking position.

[0111] like Figures 13 to 15 and Figures 31 to 34 As shown, the mating connector 2 is fully inserted into the through holes 16 and 116 of the clamps 12 and 112 along the assembly direction M, and... Figures 10 to 12 and Figures 28 to 30 The assembly state shown remains unchanged. Figure 14 , 15 As shown in 32 and 33, clamps 20 and 120 are advantageously positioned in the blocking position. Figure 14 and Figure 29 The diagram shows that the retaining arms 18 and 118 remain stationary, but due to the displacement of the retaining clips 20 and 120 to the blocking position, the retaining arms 18 and 118, with their support elements 46 and 146, abut against the blocking devices 44 and 144, thus preventing radial deformation of the retaining arms 18 and 118. Figure 15 and Figure 33As shown, support arms 22 and 122 are also in a stationary state, with the locking device 32 of the clamp 12 arranged in the positioning groove 38 of the support arm 22, especially in Figure 15 The advantageous embodiment shown.

[0112] In addition, such as Figure 15 and Figure 33 As shown, the support arms 22, 122 and their expansion devices 36, 136 abut against the outer periphery of the insertion shaft 14, which provides additional positional safety. Furthermore, the preferred expansion ramps 40a, 40b act as resistance on the locking devices 32, 132 or the outer periphery of the insertion shaft 14, resisting the transfer of the retaining clips 20, 120 from the blocking position to the insertion position.

[0113] In a preferred embodiment, the retaining clip 20 advantageously has a surface structure 62 on the connecting section 24, such as... Figure 3 As shown. This surface structure 62 is particularly advantageous for manually applying compressive force to the retaining clip 20 to transfer the retaining clip 20 to the assembly position. This embodiment can also correspond to the plug connector 101. Figures 16 to 34 The embodiments shown are used for combination.

[0114] In order to remove the mating connector 2 from the through holes 16, 116 in the opposite assembly direction M, the retaining clips 20, 120 must overcome the resistance generated by the expansion ramps 40a, 40b, 140a, 140b and move towards the insertion position. The support arms 22, 122 elastically expand through the interaction of the locking devices 32, 132 and the expansion ramps 40a, 140a or the interaction of the expansion ramps 40b, 140b with the outer periphery of the mating shaft 14.

[0115] To move the retaining clips 20 and 120 to the insertion position, it has been shown that applying a radially outward pulling force to the connecting sections 24 and 124 of the retaining clips 20 and 120 is advantageous. Figure 3 As shown, for this purpose, the retaining clip 20 may have an action profile 64 on the connecting section 24, through which the retaining clip 20 can be advantageously pried radially outward. Additionally or alternatively, the retaining clips 20, 120 may have at least one clamping arm 166, such as... Figure 18 The example is shown in the image.

[0116] Once the retaining clips 20 and 120 are once again positioned in the insertion position, the plug shaft 14 can be pulled out from the through holes 16 and 116 in the opposite assembly direction M, wherein the retaining arms 18 and 118 expand back to the tensioned state due to the cooperative interaction between the retaining arms 18 and 118 and the plug shaft 14 of the mating plug connector 2.

[0117] This invention is not limited to the exemplary embodiments shown and described, but also includes all embodiments that have the same effect within the meaning of this invention. It is explicitly emphasized that the exemplary embodiments are not limited to all combinations of features; rather, each individual sub-feature can be inventive in itself, even independently of all other sub-features. Furthermore, this invention is not limited to the combination of features defined in the preferred embodiments, but can also be defined by any other combination of certain features of all the individual features disclosed overall. This means that, in principle, every individual feature of a practical embodiment can be omitted or replaced by at least one individual feature disclosed elsewhere in this application.

[0118] List of reference numerals 1, 101, 201 plug connectors 2. Use with plug-in connectors 4, 104, 204 matrix 6, 106, and 206 through passages Sections 8, 108, and 208 Receive channels 10, 110, and 210 12, 112, 212 cages 14-pin connector 16, 116, 216 through holes 18, 118, 218 holding arms 20, 120, 220 retaining clips 22, 122, 222 support arms Connecting sections 24, 124, and 224 Windows 26, 126, and 226 27 guide groove 28, 128, 228 reinforced pillars 29 sockets 30, 130, 230 opening 32, 132 locking device 34, 134, 234 support grooves 36, 136, 236 expansion devices 38 positioning slots 40a, 40b, 140a, 140b extended slopes 42, 142, 242 retaining slots 44, 144, 244 blocking devices 46, 146, 246 support elements 48, 148, 248 slope 50 support arm 52 Support Head 54 Head Receptor 56 Guide Pins 58 Guide Channel 59 support base 60, 160 sealing elements 62 Surface Structure 64 Functional Outline 166, 266 clamping arms 168, 268 locking arms 170, 270 Lock Continuation Section 172 recess 174, 274 pressure-locking bulges 276 sales 278 through opening 280 Card Lock Pin U Insert Path M assembly direction

Claims

1. A plug connector (1, 101, 201) for connecting a first fluid line to a mating plug connector (2), the plug connector having a base (4, 104, 204) with through channels (6, 106, 206), wherein the through channels (6, 106, 206) 206) Fluidly connected to the ends of sleeve sections (8, 108, 208) of the base (4, 104, 204), wherein cages (12, 112, 212) are arranged in the receiving channels (10, 110, 210) of the sleeve sections (8, 108, 208), wherein the cages (12, 112, 212) are insertable in the assembly direction (M) into the receiving channels (10, 110, 210) of the sleeve sections (8, 108, 208) and are held axially relative to the assembly direction (M) in a form-locking manner, wherein two parallel-extending retaining arms (18, 118, 218) of retaining clips (20, 120, 220) that are insertable perpendicular to the assembly direction (M) into the cages (12, 112, 212) are held in the retaining arms (18, 118, 218). In a static state, retaining arms (118, 218) extend into the through holes (16, 116, 216) of the cages (12, 112, 212) and are designed to elastically expand radially to a tensioned state relative to the through holes (16, 116, 216). The retaining arms (20, 120, 220) are designed to radially shift from an insertion position to a blocking position and from the blocking position to the insertion position relative to the through holes (16, 116, 216). The retaining arms (18, 118, 218) expand to their tensioned state in the insertion position of the retaining arms (20, 120, 220), and in the blocking position of the retaining arms (20, 120, 220), the retaining arms (18, 118, 218) block the expansion to the tensioned state. Its features are, The retaining clips (20, 120, 220) have two support arms (22, 122, 222) that are radially elastic to the through holes (16, 116, 216), and the support arms (22, 122, 222) lock the cages (12, 112, 212) axially in the assembly direction (M) into the receiving channels (10, 110, 210), and extend into the through holes (16, 116, 216) in the stationary state, and are designed to be able to expand radially elastically to a tensioned state to the through holes (16, 116, 216).

2. The plug connector (1, 101, 201) according to claim 1. Its features are, When the support arms (22, 122, 222) are stationary and the retaining clips (20, 120, 220) are in the insertion position, the retaining clips (20, 120, 220) are prevented from shifting from the insertion position to the blocking position.

3. The plug connector (1, 101, 201) according to claim 1 or 2. Its features are, When the retaining arms (18, 118, 218) are in a tensioned state and the retaining clips (20, 120, 220) are in the insertion position, the retaining clips (20, 120, 220) are prevented from shifting from the insertion position to the blocking position.

4. The plug connector (1, 101, 201) according to claim 1. Its features are, When the support arms (22, 122, 222) are stationary and the retaining clips (20, 120, 220) are in the blocking position, the retaining clips (20, 120, 220) are force-form locked and prevented from shifting from the blocking position to the insertion position.

5. The plug connector (1, 101, 201) according to claim 1. Its features are, The retaining clips (20, 120, 220) are U-shaped, and the support arms (22, 122, 222) and the retaining arms (18, 118, 218) are connected by connecting sections (24, 124, 224) and extend from the connecting sections (24, 124, 224) to a free end in the same direction. The support arms (22, 122, 222) and the retaining arms (18, 118, 218) are arranged axially spaced apart.

6. The plug connector (1, 101, 201) according to claim 1. Its features are, The support arms (22, 122, 222) and the retaining arms (18, 118, 218) are connected by connecting sections (24, 124, 224). The retaining clips (20, 120, 220) have at least two locking protrusions (174, 274) formed on the retaining arms (18, 118, 218) and / or formed on the connecting sections (24, 124, 224) on the side facing the opposite direction of the assembly direction (M). The locking protrusions are designed to protrude in the opposite direction of the assembly direction (M) such that in the blocking position of the retaining clips (20, 120, 220), the locking protrusions (174, 274) can be radially supported on the inner peripheral wall of the through holes (16, 116, 216) of the through holes (16, 116, 216).

7. The plug connector (1, 101, 201) according to claim 6. Its features are, The two locking protrusions (274) on the retaining arms (18, 118, 218) are designed and arranged opposite each other such that the locking protrusions (274) are arranged on the axis of symmetry of the through holes (16, 116, 216) in the blocking position of the retaining clips (20, 120, 220) and in the stationary state of the retaining arms (18, 118, 218). The axis of symmetry is located within the through holes (16, 116, 216).

8. The plug connector (1, 101, 201) according to claim 1. Its features are, The cages (12, 112, 212) have two windows (26, 126, 226) that open radially to the through holes (16, 116, 216), and reinforcing struts (28, 128, 228) that extend axially to the through holes (16, 116, 216) are respectively disposed in the windows (26, 126, 226), wherein the retaining arms (18, 118, 218) engage through the windows (26, 126, 226) such that the retaining arms (18, 118, 218) are radially arranged between the through holes (16, 116, 216) and the reinforcing struts (28, 128, 228), and extend into the through holes (16, 116, 216) of the cages (12, 112, 212) in a static state.

9. The plug connector (1, 101, 201) according to claim 1. Its features are, The sleeve sections (8, 108, 208) and the clamps (12, 112, 212) each have at least two radial openings (30, 130) relative to the assembly direction (M), wherein the openings (30, 130) of the clamps (12, 112, 212) and the sleeve sections (8, 108, 208) are respectively arranged aligned with each other in the sleeve when the clamps (12, 112, 212) are inserted. In sections (8, 108, 208), the retaining clips (20, 120, 220) and the support arms (22, 122, 222) are able to pass radially along the assembly direction (M) through the openings (30, 130) of the cages (20, 120, 220) and the sleeve sections (8, 108, 208) and be inserted into the through holes (16, 116, 216) of the cages (12, 112, 212).

10. The plug connector (1, 101, 201) according to claim 9. Its features are, The cage (12, 112, 212) has two windows (26, 126, 226) that open radially to the through holes (16, 116, 216) for arranging and carrying the retaining arms (18, 118, 218). The radially open windows (26, 126, 226) are arranged axially in the assembly direction (M) and spaced apart from the openings for arranging and carrying the support arms (22, 122, 222).

11. The plug connector (1, 101, 201) according to claim 1. Its features are, The clamps (12, 112, 212) have radially outwardly pointing locking devices (32, 132), and the support arms (22, 122, 222) have corresponding support grooves (34, 134, 234). The locking devices (32, 132) engage with the support grooves (34, 134, 234) in the resting state of the support arms (22, 122, 222) and in the insertion position of the retaining clips (20, 120, 220), and prevent the retaining clips (20, 120, 220) from shifting from the insertion position to the blocking position in the resting state of the support arms (22, 122, 222).

12. The plug connector (1, 101, 201) according to claim 1. Its features are, The support arms (22, 122, 222) have radially inwardly pointing expansion devices (36, 136, 236), and the expansion devices (36, 136, 236) extend into the through holes (16, 116, 216) in the insertion position of the retaining clips (20, 120, 220) and in the resting state of the support arms (22, 122, 222), such that the support arms (22, 122, 222) can expand from the resting state to the tensioned state when inserted into the mating connector (2) along the assembly direction (M) by means of the expansion devices (36, 136, 236), thereby releasing the retaining clips (20, 120, 220) from the insertion position to the blocking position.

13. The plug connector (1) according to claim 12. Its features are, The support arms (22, 122, 222) have corresponding support grooves (34, 134, 234). The support groove (34) is located behind the expansion device (36) in the extension direction of the support arm (22). A positioning groove (38) is formed between the corresponding support groove (34) and the corresponding expansion device (36). In the static state of the support arm (22) and in the locked position of the retaining clip (20), the locking device (32) of the clamp (12) is arranged in the positioning groove (38), so that the expansion device (36) is supported on the outer periphery of the mating connector (2) in a force-shape locking manner and generates resistance to the displacement of the retaining clip (20) from the blocking position to the insertion position.

14. The plug connector (1) according to claim 13. Its features are, Each of the support arms (22) has at least one extended ramp (40a, 40b) that rises toward the free end of the support arm (22), wherein the extended ramp (40a) opens above the support groove (34) and the support groove (34) is directly adjacent to the extended ramp (40a) and / or the extended ramp (40b) opens above the positioning groove (38) and the positioning groove (38) is directly adjacent to the extended ramp (40b).

15. The plug connector (101, 201) according to claim 12. Its features are, The support arms (22, 122, 222) have corresponding support grooves (34, 134, 234), the support grooves (134) being arranged in front of the expansion device (136, 236) along the extension direction of the support arms (122, 222), and the locking device (132) of the clamp (112, 212) being arranged in the support grooves (134, 234) in the static state of the support arms (122, 222) and in the insertion position of the retaining clamps (120, 220), thereby generating resistance against the retaining clamps (120, 220) shifting from the insertion position to the blocking position.

16. The plug connector (101, 201) according to claim 15. Its features are, Each of the support arms (122, 222) has at least one extended ramp (140a, 140b) rising toward the free end of the support arm (122, 222), wherein the extended ramp (140a) opens above the support groove (134, 234) and the support groove (134, 234) is directly adjacent to the extended ramp (140a) and / or the extended ramp (140b) is formed on the expansion device (136, 236), wherein in the static state of the support arms (122, 222) and in the blocking position of the retaining clip (120, 220), the expansion device (136, 236) can be supported on the outer periphery of the mating plug connector (2) in a force-shape locking manner, thereby generating resistance against the retaining clip (120, 220) shifting from the blocking position to the insertion position.

17. The plug connector (101, 201) according to claim 15 or 16. Its features are, The support arms (122, 222) are designed such that the extension devices (136, 236) of the support arms (122, 222) are arranged behind the central axis of the through holes (116, 216) at least in the insertion position of the retaining clips (120, 220) in a direction pointing toward the free end of the support arms (122, 222).

18. The plug connector (1, 101, 201) according to claim 1. Its features are, Each of the retaining arms (18, 118, 218) has a radially outwardly opening retaining groove (42, 142, 242), which is designed to correspond to the blocking device (44, 144, 244) of the clamp (12, 112, 212), such that the blocking device (44, 144, 244) is arranged in the retaining groove (42, 142, 242) in the tensioned state of the retaining arms (18, 118, 218) and in the insertion position of the retaining clamp (20, 120, 220), thereby preventing the retaining clamp (20, 120, 220) from shifting from the insertion position to the blocking position.

19. The plug connector (1, 101, 201) according to claim 18. Its features are, The first groove wall of the retaining groove (42, 142, 242) is designed to point from the support element (46, 146, 246) toward the free end of the retaining arm (18, 118, 218), the support element protruding radially outward from the retaining arm (18, 118, 218), wherein in the stationary state of the retaining arm (18, 118, 218) and the blocking position of the retaining clip (20, 120, 220), the support element (46, 146, 246) is radially outward from the through hole (16, 116, 216) and abuts against the blocking device (44, 144, 244), thereby preventing the radial expansion of the retaining arm (18, 118, 218) and preventing the retaining arm (18, 118, 218) from changing from the stationary state to the tensioned state.

20. The plug connector (1, 101, 201) according to claim 18 or 19. Its features are, The cages (12, 112, 212) have two windows (26, 126, 226) that open radially to the through holes (16, 116, 216), and reinforcing struts (28, 128, 228) that extend axially to the through holes (16, 116, 216) are respectively disposed in the windows (26, 126, 226). The reinforcing struts (28, 128, 228) serve as blocking devices (44, 144, 244), such that the reinforcing struts (28, 128, 228) designed as blocking devices (44, 144, 244) are arranged in the retaining grooves (42, 142, 242) in the stationary state of the retaining arms (18, 118, 218) and in the insertion position of the retaining clips (20, 120, 220).

21. The plug connector (1, 101, 201) according to claim 1. Its features are, The retaining clip (20) has at least one support arm (50) arranged between the support arms (22) and designed to extend parallel to the support arms (22) to the support head (52), wherein in the blocking position of the retaining clip (20), the support head (52) is arranged in a correspondingly designed head receiving portion (54) in the outer periphery of the cage (12).

22. The plug connector (1, 101, 201) according to claim 1. Its features are, The retaining clip (20) has at least one guide pin (56) arranged between the retaining arms (18) and designed to extend parallel to the retaining arms (18) to a support end, wherein in the blocking position of the retaining clip (20), the guide pin (56) rests with its support end against the outer periphery of the cage (12).

23. The plug connector (1, 101, 201) according to claim 22. Its features are, The cage (12) has a guide channel (58) designed to correspond to the guide pin (56), the guide pin (56) engaging radially into the guide channel at the blocking position of the retaining clamp (20) in the through hole (16).

24. The plug connector (1, 101, 201) according to claim 5. Its features are, The retaining clips (120, 220) have at least one radially resilient clamping arm (166) extending from a section formed on the connecting section (124, 224) and / or the retaining arm (118, 218) toward the free end of the clamping arm (118, 218), wherein each clamping arm (166) is radially spaced from the clamping arm (118, 218) by an end section, such that the clamping arm (166) can elastically deform toward the retaining arm (118, 218) with a force acting radially on the end section.

25. The plug connector (1, 101, 201) according to claim 1. Its features are, The clamps (112, 212) are held in a form-locking manner by at least one radially resilient locking arm (168, 268) having a radially outwardly projecting locking extension (170, 270) that, in the inserted state, engages in a form-locking manner with a recess (172) in the peripheral wall of the sleeve section (108, 208), wherein the locking arm (168, 268) is formed on the outer periphery of the clamps (112, 212).

26. The plug connector (101) according to claim 25. Its features are, The clamp (112) is held in a form-locking manner by at least two radially resilient locking arms (168), each having a radially outwardly projecting locking extension (170) that, in the inserted state, engages in a form-locking manner with a recess (172) in the peripheral wall of the sleeve section (108), wherein the locking arms (168) are formed on the outer periphery of the clamp (112).

27. The plug connector (201) according to claim 1. Its features are, The retaining clip (220) located between the support arms (220) has at least one pin (276) protruding radially from the through hole (216), wherein the sleeve section (208) and the cage (212) each have at least one through opening (278) radially relative to the assembly direction (M), wherein the through opening (278) of the cage (212) and the sleeve section (208) are respectively arranged in the sleeve section (208) aligned with each other in the inserted state of the cage (212), such that the retaining clip (220) can be inserted radially to the assembly direction (M) through the pin (276) through the through opening (278) of the cage (212) and the sleeve section (208).

28. The plug connector (201) according to claim 27. Its features are, The clamp (212) has a radially elastic locking arm (268) formed radially opposite to the through hole (216) and the through opening (278). The locking arm has a locking extension (270) that protrudes radially outward on the outer periphery. The locking extension engages with a recess in the peripheral wall of the sleeve section (208) in a form-locking manner in the inserted state.

29. The plug connector (1, 101, 201) according to claim 7. Its features are, The axis of symmetry extends perpendicular to the displacement direction of the retaining clips (20, 120, 220).

30. The plug connector (1, 101, 201) according to claim 10. Its features are, The windows (26, 126, 226) and the openings (30, 130) are arranged axially in front of and behind the through holes (16, 116, 216).

31. The plug connector (1, 101, 201) according to claim 24. Its features are, The retaining clips (120, 220) have two opposing radially resilient clamping arms (166).

Images