Plug connector with fitting lock

Abstract

The utility model provides a plug-in connector with an assembly lock, which is used for connecting a first fluid pipeline to a matched plug-in connector and is provided with a base body with a through channel, the through channel is in fluid connection to the end part of the base body designed as a sleeve section, and a clamping cage is arranged in a receiving channel of the sleeve section. The clamping cage can be inserted into the receiving channel of the sleeve section in the assembling direction, the two retaining arms extend into the through hole of the clamping cage in the rest state, the retaining clip can be radially displaced relative to the through hole from an insertion position into a blocking position and from the blocking position into the insertion position, and the retaining arms can be expanded into the tensioning state in the insertion position of the retaining clip. The retaining arms are blocked in a blocking position of the retaining clip to prevent expansion into the tensioned state, the retaining clip has two support arms which are elastic radially to the through-hole and which fix the clip cage in the receiving channel in a form-fitting manner axially in the mounting direction, and wherein the support arms project into the through-hole in a resting state of the support arms, and the spring can be elastically expanded to a tensioning state in the radial direction of the through hole.

Description

TECHNICAL FIELD

[0001] The plug-in connector according to the application is used to connect a first fluid line to a mating plug-in connector. The plug-in connector has a base body with a through-going channel. The through-going channel is fluidically connected to an end of the base body which is designed as a sleeve section, wherein a cage is arranged in a receiving channel of the sleeve section. The cage 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-locked manner. Two mutually parallel running holding arms of a holding clip inserted into the cage perpendicularly to the assembly direction project into a through-hole of the cage when the holding arms are in a rest state and are designed to be elastically expandable into a tensioned state radially to the through-hole. The holding clip is designed to be displaceable relative to the through-hole radially from an insertion position to a blocking position and from the blocking position to the insertion position. In the insertion position of the holding clip, the holding arms are expandable in particular to their tensioned state. In addition, the holding arms are blocked in the blocking position of the holding clip against expansion to their tensioned state. BACKGROUND

[0002] A plug-in connector for connecting a mating plug-in connector is known from WO 2015 / 181396 A2. In this plug-in connector, the cage has a latching tongue which extends in the assembly direction and which, in the inserted state, engages in a form-locked manner in the axial direction into a recess of the peripheral wall of the sleeve section. Furthermore, the plug-in connector has a latching arm which extends counter to the assembly direction and which prevents the mating plug-in connector from being moved counter to the assembly direction. It has proven to be disadvantageous that the latching tongue which holds the cage in the sleeve section in a form-locked manner must be designed to be very large in size, so that a relatively large installation space is required.

[0003] In order to avoid an unnecessary loosening of the mating plug-in connector, WO 2015 / 181396 A2 provides a locking element which is arranged 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 prevents the latching arm from expanding radially in the locked position, so that the mating plug-in connector is prevented from being released. It has been shown here that the locking element can be moved into the locked position even without the mating plug-in connector being inserted and prevents the mating plug-in connector from being inserted. Furthermore, the locking requires an additional assembly step, which also increases the assembly effort.

[0004] Another disadvantage is the latching arm, which covers the plug-in axis of the mating plug-in connector over a certain axial length in order to maintain the radial spring property, but only provides a comparatively small surface coverage of the mating plug-in connector here. In particular in the case of large dimensions and vibrations, in particular for mating plug-in connectors with a plug-in diameter of more than 14 mm, under certain conditions, the mating plug-in connector can come loose and detach from the plug-in connector. It has also been found to be disadvantageous that large tensile or compressive loads can lead to leaks or damage to the cage. Utility model content

[0005] The object of the utility model is to provide a plug-in connector, which overcomes the disadvantages known from the prior art and in particular at least improves the resistance, the tightness and / or the assembly.

[0006] According to the utility model, the object is achieved by the features of the utility model. Because the retaining clip has two support arms which are elastic in the radial direction of the through-hole, and the support arms fix the cage axially to the assembly direction in a form-locked manner in the receiving channel, and in the resting state of the support arms extend into the through-hole, and are designed to be able to expand radially to the through-hole in an elastic manner to a tensioned state, the axial extension of the cage is shortened, so that installation space is saved, which can optionally be used for additional sealing means.

[0007] Furthermore, the retaining clip according to the utility model has the advantage that it fixes the cage in the receiving channel of the sleeve section and the mating plug-in connector in the through-hole of the cage. By integrating the pre-assembly lock into the retaining clip, the number of elements of the plug-in connector can advantageously be reduced, which also leads to a reduction in the assembly steps.

[0008] In addition, the embodiment according to the utility model provides the technical possibility that the retaining clip cannot be moved into the blocking position when the support arms are in the resting state. This advantageously provides a pre-assembly lock, which prevents the retaining clip from being moved into the blocking position before the mating plug-in connector is inserted into the through-hole and prevents the mating plug-in connector from being inserted.

[0009] In a particular embodiment of the utility model, the retaining clip is blocked from being displaced from the insertion position into the blocking position when the support arms are in the resting state and the retaining clip is in the insertion position. Advantageously, the retaining clip cannot be moved into the blocking position and blocks the insertion of the mating plug-in connector.

[0010] Another advantageous embodiment provides that the retaining clip is blocked from being displaced from the insertion position into the blocking position when the support arms are in the tensioned state and the retaining clip is in the insertion position. This embodiment advantageously prevents the retaining clip from being moved into the blocking position before the mating plug-in connector is fully inserted. In particular, incorrect assembly is prevented and additional assembly control is provided.

[0011] It is further advantageous when the support arm is in the rest state and the retaining clip is in the blocking position that the retaining clip is positively blocked by a force against displacement from the blocking position to the insertion position. Advantageously, the force positive must first be overcome before the retaining clip is moved into the insertion position, which can potentially lead to the risk of the mating plug connector being released from the through-hole unintentionally. In particular, this design makes the plug connection more resistant to external influences, such as vibrations.

[0012] During the insertion process, the mating plug connector is inserted into the through-hole with the plug shaft in the assembly direction. Here, the plug shaft passes through the section of the retaining arm that extends into the through-hole and the section of the support arm that extends into the through-hole. Preferably, the plug shaft, the retaining arm, and the support arm are designed to correspond to one another such that the plug shaft exerts a force acting radially outward in the assembly direction on the retaining arm and the support arm. As a result of the outwardly acting force, the retaining arm and the support arm are each elastically deformed radially outward from the rest state into the tensioned state.

[0013] The mating plug connector advantageously has a latching groove behind the plug shaft, the diameter of which is smaller than the diameter of the plug shaft.

[0014] Advantageously, the retaining arm is arranged adjacent to the latching groove of the fully inserted mating plug connector in the assembled state of the plug connector, in particular when the mating plug connector is fully inserted into the through passage in the assembly direction. As a result of the reduced diameter of the latching groove, the retaining arm is advantageously relaxed such that the retaining arm is deformed from the expanded tensioned state in the area of the latching groove back into the rest state. The mating plug connector is thereby advantageously blocked in a form-locked manner against axial movement in the assembly direction.

[0015] Because the mating plug connector advantageously regulates the tensioned state and the rest state of the retaining arm and / or the support arm, the insertion depth of the mating plug connector can be controlled during and after the insertion process by checking the state of the retaining arm and / or the support arm.

[0016] It is advantageous that the retaining clip is U-shaped. Preferably, the support arm and the retaining arm are also connected to one another by a connecting section. In particular, the connecting section is simultaneously a force introduction point such that the 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 a pulling force or a pressure force onto the connecting section. Preferably, in particular to reduce the assembly effort, the support arm and the retaining arm extend in the same direction from the connecting section to the free end, respectively, wherein in a particular embodiment the support arm and the retaining arm are arranged advantageously axially spaced apart from one another such that a gap is formed between the support arm and the retaining arm, respectively.

[0017] According to an advantageous variant of the plug-in connector, the retaining clip has at least two press-lock elevations on the side facing away from the direction of assembly, which are formed on the retaining arms and / or on the connection section. The press-lock elevations advantageously project against the direction of assembly, so that in the blocking position of the retaining clip, the press-lock elevations can be supported radially on the inner peripheral wall of the through-hole. In particular, in the case of a complete insertion of the mating plug-in connector into the plug-in connector, the retaining clip is moved axially against the direction of assembly when a system pressure load is applied, so that the press-lock elevations are arranged in the gap between the plug axis and the peripheral wall of the through-hole. The press-lock elevations here block the radial expansion of the retaining arms to their tensioned state and / or the displacement of the retaining clip from the blocking position to the insertion position. An unintended loosening of the retaining clip or of the mating plug-in connector is prevented by the press-lock elevations.

[0018] Advantageously, the retaining clip is also designed such that, when the mating plug-in connector is completely inserted, the retaining clip is axially supported on the support surface of the cage, which points in the direction of assembly, by the region abutting to the press-lock elevations on the side pointing against the direction of assembly, and is radially supported on the peripheral wall of the through-hole by the press-lock elevations.

[0019] It is particularly advantageous if the at least two press-lock elevations on the retaining arms are designed opposite one another. Here, the press-lock elevations are preferably designed and arranged such that the press-lock elevations are arranged on the axis of symmetry of the through-hole in the blocking position of the retaining clip and in the resting state of the retaining arms, the axis of symmetry extending within the through-hole. The axis of symmetry of the through-hole is in particular the axis of symmetry extending perpendicular to the direction of movement of the retaining clip.

[0020] According to a variant of the utility model, the cage has two windows radially open to the through-hole. The reinforcing struts axially to the through-hole are advantageously arranged in the windows, respectively. Advantageously, the plug-in connector, in particular the cage, is reinforced at least axially in the direction of assembly by the reinforcing struts. Reinforcement also means that the tensile or compressive load is distributed more evenly on the circumference of the plug-in connector. In particular, this can prevent leaks and damage.

[0021] In particular, in the advantageous embodiment of the utility model, the retaining arms engage through the windows, so that the retaining arms are arranged radially between the through-hole and the reinforcing struts. The retaining arms are advantageously arranged here such that the retaining arms project into the through-hole of the cage in the resting state.

[0022] It is particularly advantageous if the base body has four axial guide grooves distributed on the circumference, which are arranged offset by 90° from one another and open against the direction of assembly. The reinforcing struts are advantageously configured with a radial protrusion relative to the cage, so that the reinforcing struts engage into the guide grooves and block a twisting in order to arrange the cage in the receiving channel.

[0023] The reinforcing strut is advantageously designed with a receptacle such that, in the state in which the cage is fitted in the receiving channel, the receptacle ensures a favorable distance between the collar of the cage and the end of the base body which is opposite the fitting direction.

[0024] In a preferred embodiment of the utility model, the sleeve section and the cage each have an opening which is at least as large as the radial direction of the fitting direction. In particular, in the state in which the cage is inserted into the sleeve section, the openings of the cage and the sleeve section are each arranged in alignment with one another such that the retaining clip with the support arm can be inserted into the through-hole of the cage radially to the fitting direction through the openings of the cage and the sleeve section. In particular, the arrangement of the support arm which engages through the respective openings is a simple and easy-to-produce fixing of the cage in the sleeve section of the base body.

[0025] The radially open window for arranging and carrying the retaining arm is advantageously arranged axially to the fitting direction spaced apart from the opening for arranging and carrying the support arm. For a simple and quick fitting of the retaining clip, in particular for the displacement between the blocking position and the insertion position, it is particularly advantageous if the window and the opening are arranged axially one after the other, in particular without an angular offset with respect to the through-hole. Advantageously, the support arm and the retaining arm are respectively arranged axially one after the other on the retaining clip such that the retaining arm and the support arm are respectively arranged axially offset.

[0026] The cage preferably has a latching device which points radially outwards. The support arm advantageously has a support groove which corresponds to the latching device. In particular, the latching device engages into the support groove in the resting state of the support arm and in the insertion position of the retaining clip. Thereby, it is advantageously ensured that the latching device form-locked blocks the displacement of the retaining clip from the insertion position to the blocking position when the support arm is in the resting state.

[0027] According to a further development, the support arm has a spreading device which points radially inwards. In the insertion position of the retaining clip and in the resting state of the support arm, the spreading device advantageously protrudes into the through-hole such that the support arm, via the spreading device, can be spread from the resting state to the tensioned state when the mating plug connector is inserted in the fitting direction. In particular, the plug-in shaft of the mating plug connector here lifts the latching device out of the support groove, which advantageously releases the displacement of the retaining clip from the insertion position to the blocking position. This design increases the safety such that the retaining clip is transferred to the blocking position by the mating plug connector which is not inserted or not completely inserted in the pre-fitting or partial-fitting state and blocks the unintentional insertion of the mating plug connector with the retaining clip.

[0028] A further variant provides that the bearing groove is advantageously arranged behind the expansion device in the direction of extension of the bearing arm. In particular, a positioning groove is formed between the respective bearing groove and the respective expansion device. Preferably, in the rest state of the bearing arm and in the blocking position of the retaining clip, the latching device of the clip cage is arranged in the positioning groove, such that the expansion device is supported in a force-positively locking manner on the outer circumference of the mating plug connector, in particular of the plug shaft of the mating plug connector, and advantageously a resistance against displacement of the retaining clip from the blocking position to the insertion position is generated. This resistance is particularly advantageous for preventing an unintended release of the retaining clip from the blocking position to the insertion position. This can lead to an uncontrolled release of the plug shaft from the through-hole or to a displacement of the mating plug connector out of the through-hole in a direction opposite to the assembly direction. This embodiment is therefore particularly advantageous in the case of high vibrations and other external influences on the plug connection.

[0029] Advantageously, each bearing arm has at least one expansion ramp raised towards the free end of the bearing arm. In particular, the expansion ramps each open above the bearing groove. Preferably, the bearing groove directly adjoins the expansion ramp. In particular, when the retaining clip is moved from the blocking position to the insertion position, the latching device can slide over the expansion ramp, such that the bearing arm is elastically deformed radially outwards in a material-protecting manner and the latching device is lifted out of the positioning groove. Advantageously, the jamming between the latching device and the positioning groove is overcome in coordination.

[0030] As an alternative or in addition to the above-mentioned embodiments, it has proven advantageous for one of the expansion ramps raised towards the free end of the bearing arm to open above the positioning groove and for the positioning groove to directly adjoin the expansion ramp. In particular, when the retaining clip is moved from the blocking position to the insertion position, the expansion ramp of the positioning groove is supported on the outer circumference of the mating plug connector, in particular of the plug shaft of the mating plug connector, such that the bearing arm is elastically deformed radially outwards in a material-protecting manner and the latching device is lifted out of the positioning groove. Advantageously, the jamming between the latching device and the positioning groove is overcome in coordination.

[0031] The expansion ramp has the advantage that it is deformed in a radially elastic manner in coordination with the displacement of the bearing wall when the retaining clip is displaced radially to the through-hole from the blocking position to the insertion position. Thus, the jamming between the latching device and the positioning groove is designed as a resistance that can be overcome and is dimensioned sufficiently robust to prevent an unintended change of position. In particular, the resistance to be overcome can be adjusted by the angle of inclination of the respective expansion ramp.

[0032] A further embodiment provides that the bearing groove is arranged in front of the expansion device in the direction of extension of the bearing arm. It is advantageous here for the latching device of the clip cage to be arranged in the bearing groove in the rest state of the bearing arm and in the insertion position of the retaining clip, such that a resistance against displacement of the retaining clip from the insertion position to the blocking position is generated.

[0033] According to an advantageous variant of the preceding embodiments of the utility model, each support arm has at least one expansion ramp raised towards the free end of the support arm. In particular, the expansion ramps each open above the support groove. The support groove is preferably immediately adjacent to the expansion ramp. Alternatively or additionally, the expansion ramps are each formed on the expansion device. Preferably, in the rest state of the support arms and in the blocking position of the retaining clip, the expansion device can be supported on the outer circumference of the mating plug connector in a force form-locking manner, thereby generating a resistance to displacement of the retaining clip from the blocking position to the insertion position.

[0034] In a variant of the utility model, each retaining arm has a retaining groove which opens radially outwards. Preferably, the retaining groove is designed to correspond to the blocking device of the clip cage, such that the blocking device is arranged in the retaining groove in the tensioned state of the retaining arms and in the insertion position of the retaining clip. The blocking device is advantageously arranged in the retaining groove such that displacement of the retaining clip from the insertion position to the blocking position is blocked.

[0035] It has proven to be advantageous for assembly safety that, with this design, the retaining clip can be transferred from the insertion position to the blocking position only when the mating plug connector with the plug-in shaft is completely arranged in the through-hole. In particular, the mating plug connector with the plug-in shaft is completely arranged in the through-hole when the latching groove of the mating plug connector is arranged adjacent to the retaining arms. When the mating plug connector with the plug-in shaft is completely inserted, the retaining arms, which are elastically deformed in the tensioned state, advantageously return to the rest state, thereby arranging themselves in the latching groove. It is then advantageous when the blocking device is lifted out of the retaining groove and the blocking for the transfer of the retaining clip from the insertion position to the blocking position is eliminated when the retaining arms are in the rest state. Since the retaining clip can be transferred from the insertion position to the blocking position only when the retaining arms are in the rest state, the insertion state of the mating plug connector can be easily checked.

[0036] Preferably, a first groove wall of the retaining groove facing the free end of the retaining arm is formed by a support element projecting radially outwards from the retaining arm. In particular, in the rest state of the retaining arms and in the blocking position of the retaining clip, the support element radially abuts against the blocking device towards the outside of the through-hole, such that the radial expansion of the retaining arms to the tensioned state is advantageously blocked. In this state, the transition of the retaining arms from the rest state to the tensioned state is also advantageously blocked.

[0037] The variant of the utility model is advantageous in preventing the mating plug-in connector from being released from the through hole accidentally after the retaining clip has been moved to the blocking position after the mating plug-in connector has been inserted into the through hole completely. In particular, in order to eliminate the hindrance to the elastic deformation of the retaining arm in the tensioned state, the retaining clip needs to be moved to the insertion position. In combination with the foregoing advantageous embodiments, the synergistic effect is that the retaining clip must first overcome the resistance generated by the expansion slope in order to be moved to the insertion position. Therefore, the possibility of preventing the mating plug-in connector from being displaced undesirably from the through hole against the assembly direction is provided.

[0038] The support element is advantageously designed as a ramp element, wherein the ramp element preferably has a ramped surface which rises towards the free end of the retaining arm. The ramped surface is advantageously open on the first groove wall of the retaining groove. In particular, the ramped surface has a manufacturing advantage.

[0039] In particular, the support element, preferably the ramp element, can be designed in correspondence with the blocking device, such that the retaining arm is slightly elastically pressed radially inwards in the rest state, such that the radial restoring force of the retaining arm presses the support element against the blocking device, for example in order to avoid vibrations and to avoid components from colliding with each other.

[0040] The advantageous reinforcing strut is advantageously used as the blocking device, such that the reinforcing strut designed as the blocking device is advantageously arranged in the retaining groove in the rest state of the retaining arm and in the insertion position of the retaining clip. The effect is that the rigidity of the clip cage is increased, while the assembly safety of the plug-in connector is increased at the same time.

[0041] According to a preferred embodiment of the utility model, the retaining clip has at least one support arm. Variants with two or more support arms have also proven to be advantageous. The support arm is advantageously arranged between the support arms and is designed in particular to extend parallel to the support arms to a support head. In the blocking position of the retaining clip, the support head is advantageously arranged in a correspondingly designed head receptacle in the outer circumference of the clip cage. The support head forms a stop together with the head receptacle, thereby blocking the retaining clip from being radially displaced beyond the blocking position from the insertion position by the support head abutting against the head receptacle. In particular, embodiments with two or more support arms have a correspondingly large number of head receptacles.

[0042] In a further improved embodiment of the plug-in connection, the retaining clip has at least one guide pin which is arranged between the retaining arms. Preferably, the guide pin is designed to extend parallel to the retaining arms to a support end. It has proven to be advantageous if, in the blocking position of the retaining clip, the guide pin abuts with its support end on the outer circumference of the clip cage. In correspondence with the support arms, the guide pin forms a stop together with the outer circumference of the clip cage, thereby blocking the retaining clip from being radially displaced beyond the blocking position from the insertion position by the support head abutting against the head receptacle.

[0043] For better assembly, in particular for better guiding of the retaining clip, the clip cage has a guide channel which is designed to correspond to the guide pin. The guide pin here projects into the guide channel in the blocking position of the retaining clip, such that the retaining clip cannot be twisted and / or jammed when it is shifted between the blocking position and the insertion position.

[0044] The guide channel advantageously extends through both bearing seats, which are preferably designed such that, in the state in which the clip cage is assembled in the receiving channel, the bearing seats ensure a favorable distance between the collar of the clip cage and the end of the base body which is directed opposite the assembly direction.

[0045] For better disassembly, a preferred variant of the utility model provides that the retaining clip has at least one, in particular two, opposing radially resilient clamping arms. The clamping arms advantageously extend from a section formed on the connecting section and / or the retaining arm in the direction of the free end of the retaining arm. In particular, the clamping arms are each designed with an end section which is radially spaced apart from the retaining arm, such that the clamping arms can be elastically deformed towards the retaining arm by a force acting radially onto the end section. In particular, in order to move the retaining clip from the blocking position to the insertion position, the clamping arms provide a preferred action profile for gripping by hand or with a tool.

[0046] It has proven particularly advantageous if the clip cage is held in the receiving channel in a form-locked manner by at least one, in particular two, opposing latching arms. The latching arms are advantageously designed to be radially resilient and have a radially outwardly projecting latching continuation. In the inserted state, the latching continuation advantageously engages in a form-locked manner into a recess in the peripheral wall of the sleeve section, such that the clip cage is held in the sleeve section. For this purpose, the latching arms are preferably formed on the outer circumference of the clip cage.

[0047] A further alternative or additional embodiment for holding the clip cage in the receiving channel provides that the retaining clip between the bearing arms has at least one pin which projects radially towards the through-hole. The sleeve section and the clip cage here each have at least one through-hole which is radial with respect to the assembly direction. Advantageously, in the state in which the clip cage is inserted into the sleeve section, the through-holes of the clip cage and the sleeve section are each arranged in alignment with one another, such that the retaining clip with the pin can be inserted radially to the assembly direction through the through-holes of the clip cage and the sleeve section. In the position in which the pin is inserted into the through-hole, the pin blocks in a form-locked manner, such that the clip cage is axially moved relative to the receiving channel.

[0048] Further advantageous embodiments of the utility model result from the following description of the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0049] In the drawings:

[0050] Figure 1 An exploded view of a plug connector according to the utility model is shown;

[0051] Figure 2 A perspective view of a cage according to the utility model is shown;

[0052] Figure 3 A perspective view of a retaining clip according to the utility model is shown;

[0053] Figure 4 A sectional view along the assembly direction of a plug connector according to the utility model is shown, with a partially inserted mating plug connector in a first assembly state, with the retaining clip in an insertion position;

[0054] Figure 5 A sectional view along Figure 4 the parting line A-A is shown;

[0055] Figure 6 A sectional view along Figure 4 the parting line B-B is shown;

[0056] Figure 7 A sectional view along the assembly direction of a plug connector according to the utility model is shown, with a partially inserted mating plug connector in a second assembly state, with the retaining clip in an insertion position;

[0057] Figure 8 A sectional view along Figure 7 the parting line C-C is shown;

[0058] Figure 9 A sectional view along Figure 7 the parting line D-D is shown;

[0059] Figure 10 A sectional view along the assembly direction of a plug connector according to the utility model is shown, with a fully inserted mating plug connector in a third assembly state, with the retaining clip in an insertion position;

[0060] Figure 11 A sectional view along Figure 10 the parting line E-E is shown;

[0061] Figure 12 A sectional view along Figure 10 the parting line F-F is shown;

[0062] Figure 13 A sectional view along the assembly direction of a plug connector according to the utility model is shown, with a fully inserted mating plug connector in a fourth assembly state, with the retaining clip in a blocking position;

[0063] Figure 14 A sectional view along Figure 13 the parting line G-G is shown;

[0064] Figure 15 It shows along Figure 13 A cross-sectional view of the dividing line HH;

[0065] Figure 16 An exploded view of another plug connector according to the present invention is shown;

[0066] Figure 17 A perspective view of another clamping cage according to the present invention is shown;

[0067] Figure 18 A perspective view of another retaining clip according to the present invention is shown;

[0068] Figure 19 It shows Figure 1 A cross-sectional view along the assembly direction of the plug connector according to the present invention, wherein the uninserted mating plug connector is in a first assembly state, wherein the retaining clip is in the inserted position;

[0069] Figure 20 It shows along Figure 19 A sectional view of dividing line II;

[0070] Figure 20a An alternative construction with a retaining arm is shown, such as Figure 20 Sectional view in;

[0071] Figure 21 It shows along Figure 19 A cross-sectional view of the dividing line JJ;

[0072] Figure 22 A cross-sectional view along the assembly direction of the plug connector according to the present invention is shown, wherein the partially inserted mating plug connector is in a second assembly state, wherein the retaining clip is in the inserted position;

[0073] Figure 23 It shows along Figure 22 A cross-sectional view of the dividing line KK;

[0074] Figure 23a An alternative construction with a retaining arm is shown, such as Figure 23 Sectional view in;

[0075] Figure 24 It shows along Figure 22 A cross-sectional view of the dividing line LL;

[0076] Figure 25 A cross-sectional view along the assembly direction of the plug connector according to the present invention is shown, wherein the partially inserted mating plug connector is in a third assembly state, wherein the retaining clip is in the inserted position;

[0077] Figure 26 a sectional view along the split line M-M of Figure 25 ;

[0078] Figure 26a a sectional view along the split line M-M of Figure 26 ;

[0079] Figure 27 a sectional view along the split line N-N of Figure 25 ;

[0080] Figure 28 a sectional view along the assembly direction of a plug-in connector according to the application, with a fully inserted mating plug-in connector in a fourth assembly state, with the retaining clip in the insertion position;

[0081] Figure 29 a sectional view along the split line O-O of Figure 28 ;

[0082] Figure 29a a sectional view along the split line O-O of Figure 29 ;

[0083] Figure 30 a sectional view along the split line P-P of Figure 28 ;

[0084] Figure 31 a sectional view along the assembly direction of a plug-in connector according to the application, with a fully inserted mating plug-in connector in a fifth assembly state, with the retaining clip in the blocking position;

[0085] Figure 32 a sectional view along the split line Q-Q of Figure 31 ;

[0086] Figure 32a a sectional view along the split line Q-Q of Figure 32 ;

[0087] Figure 33 a sectional view along the split line R-R of Figure 31 ;

[0088] Figure 34 a sectional view along the split line S-S of Figure 31 ;

[0089] Figure 35 a perspective view of a further cage according to the application;

[0090] Figure 36 a perspective view of a further retaining clip according to the application;

[0091] Figure 36a a perspective view of a holding clip according to the utility model in Figure 36

[0092] Figure 37 a sectional view along the assembly direction of a plug-in connector according to the utility model, with a fully inserted mating plug-in connector without system pressure load;

[0093] Figure 38 a detailed view of the area T according to Figure 37

[0094] Figure 39 a sectional view along the assembly direction of a plug-in connector according to the utility model, with a fully inserted mating plug-in connector with system pressure load;

[0095] Figure 40 a detailed view of the area V according to Figure 39 DETAILED DESCRIPTION

[0096] In the individual figures of the drawing, identical components always have the same reference numerals.

[0097] With regard to the following description, the utility model is not limited to the embodiments, and is therefore also not limited to all or several features of the described feature combinations, rather, each individual partial feature of each embodiment is also of importance for the purposes of the utility model, independently of all other partial features associated therewith, and also in combination with any feature of another embodiment.

[0098] Figure 1 and Figure 16 a plug-in connector 1, 101 for connecting a first fluid line to a mating plug-in connector 2 is shown. The mating plug-in connector 2 is in particular shown together with the plug-in connector 1, 101, 201 in Figure 4 , 7 , 10, 13, 19, 22, 25, 28, 31, 34, 37 and 39.

[0099] The plug-in connector 1, 101, 201 has a base body 4, 104, 204 with a through channel 6, 106, 206 as shown in Figure 1 , 16 , 37 and 39. In particular, as shown in Figure 4 , 19 , 22 and 37, the through channel 6, 106, 206 is fluidically connected to an end of the base body 4, 104, 204 designed as a sleeve section 8, 108, 208. ​​​

[0100] The collet 12, 112, 212 is arranged in the receiving channel 10, 110, 210 of the sleeve section 8, 108, 208. The collet 12, 112, 212 can be detachably arranged in the receiving channel 10, 110, 210. The collet 12, 112, 212 is shown in detail in Figure 2 , 17 and 35. As shown in Figure 1 and 16 , the collet 12, 112, 212 can be inserted into the receiving channel 10, 110, 210 of the sleeve section 8, 108, 208 in a fitting direction M and is held in a form-locked manner axially with respect to the fitting direction M.

[0101] The collet 12, 112, 212 is held in the through-hole 16, 116, 216 of the sleeve section 8, 108, 208 by two holding arms 18, 118, 218 of a holding clip 20, 120, 220 which are insertable perpendicular to the fitting direction M into the holding clip 20, 120, 220 of the collet 12, 112, 212. The holding clip 20, 120, 220 is shown in detail in Figure 1 , 3 , 16, 18 and 36.

[0102] The two holding arms 18, 118, 218 of the holding clip 20, 120, 220 are designed to extend parallel to one another and to protrude into the through-hole 16, 116, 216 of the collet 12, 112, 212 when the holding clip 20, 120, 220 is in a rest state. Furthermore, the holding arms 18, 118, 218 are designed to be elastically expandable to a tensioned state radially to the through-hole 16, 116, 216.

[0103] The holding clip 20, 120, 220 is designed to be displaceable radially to the through-hole 16, 116, 216 from an insertion position, in particular shown in Figure 5 , 6 , 8, 9, 11, 12, 20, 20a, 21, 23, 23a, 24, 26, 26a, 27, 29, 29a, and 30, to a blocking position, as shown in Figure 14 , 15 , 32, 32a, 33, 39, and from the blocking position to the insertion position.

[0104] In the insertion position of the holding clip 20, 120, 220, the holding arms 18, 118, 218 are in particular expandable to their tensioned state. Furthermore, as shown in Figure 14 and Figure 32 and Figure 32a , the holding arms 18, 118, 218 are blocked in the blocking position of the holding clip 20, 120, 220 to prevent expansion to the tensioned state.

[0105] According to the utility model, the holding clip 20, 120, 220 has two radially to the through hole 16, 116, 216 particularly elastic support arms 22, 122, 222 as shown in Figure 3 、 6 , 9, 12, 15, 18, 21, 24, 27, 30 and 33, 36. The support arms 22, 122, 222 axially fix the cage 12, 112, 212 in the receiving channel 10, 110, 210 of the sleeve section 8, 108, 208 in the assembly direction M in a form-fitting manner and, according to the utility model, in the resting state of the support arms 22, 122, 222, extend into the through hole 16, 116, 216 of the cage 12, 112, 212. Furthermore, as shown in Figure 9 、 12 , 27 and 30, the support arms 22, 122, 222 are designed to be radially elastically expandable to a tensioned state relative to the through hole 16, 116, 216, which is part of the utility model.

[0106] Advantageously, when the support arms 22, 122, 222 are in the resting state and the holding clip 20, 120, 220 is in the insertion position, the holding clip 20, 120, 220 is blocked from being displaced from the insertion position to the blocking position. This embodiment is shown in particular in Figure 6 、 21 and 23 or 23a.

[0107] Preferably, when the holding arms 18, 118, 218 are in the tensioned state and the holding clip 20, 120, 220 is in the insertion position, the holding clip 20, 120, 220 is blocked from being displaced from the insertion position to the blocking position as shown in Figure 8 、 23 , 23a and 26 and 26a.

[0108] As shown in Figure 15 、 33 and 39, when the support arms 22, 122, 222 are in the resting state and the holding clip 20, 120, 220 is in the blocking position, the holding clip 20, 120, 220 is force- and form-fittingly blocked from being displaced from the blocking position to the insertion position.

[0109] In a specific embodiment of the utility model, the holding clip 20, 120, 220 is U-shaped, as shown in Figure 3 、 18The support arms 22, 122, 222 and the retaining arms 18, 118, 218 are advantageously connected via the connecting sections 24, 124, 224 and extend in the same direction, preferably from the connecting sections 24, 124, 224 to a free end, respectively. In particular, the support arms 22, 122, 222 and the retaining arms 18, 118, 218 are arranged axially spaced apart from one another. As Figure 3 , 18 The gap is preferably formed between the retaining arms 18, 118, 218 and the axially offset support arms 22, 122, 222, respectively, from the free end to the connecting section 24, 124, 224, respectively, as shown in Figs. 36.

[0110] Advantageous variants of the retaining clip 120, 220 are shown in particular in Figure 16 and 36 The retaining clip 120, 220 advantageously has at least two press- lock elevations 274 on the side facing away from the assembly direction M, which are formed on the retaining arms 118, 218 and / or on the connecting sections 124, 224. A preferred variant with two press-lock elevations 174 on the connecting section 124 is shown exemplarily in Figure 16 An extended embodiment shown by way of example in Figure 36 has, in addition to the two press-lock elevations 274 on the connecting section 224, two additional press-lock elevations 274 on the retaining arms 218. It can also be provided that three press-lock elevations 274 are arranged on the connecting section 224 and two press-lock elevations 274 are arranged on the retaining arms 218, as shown in Figure 36 .

[0111] The press-lock elevations 174, 274 are advantageously designed to protrude against the assembly direction M, so that in the blocking position of the retaining clip 120, 220 the press-lock elevations 174, 274 can be supported radially on the inner peripheral wall of the through-hole 116, 216.

[0112] In particular, the two press-lock elevations 274 on the retaining arms 218 are designed and arranged opposite one another, so that the press-lock elevations 274 in the blocking position of the retaining clip 220 and in the rest state of the retaining arms 218 are arranged on the axis of symmetry of the through-hole 216, which extends within the through-hole 216, in particular perpendicular to the displacement direction of the retaining clip 220.

[0113] In order to block the radial displacement of the retaining clip 120, 220 from the blocking position to the insertion position and / or the radial expansion of the retaining arm 118, 218, in particular in the case of system pressure loads generated by the supply fluid in operation, the pressure lock ridge 174, 274 proves to be particularly advantageous. In particular, in the case of a complete insertion of the mating plug connector 2 into the plug connector 101, 201, the retaining clip 120, 220 is moved axially against the assembly direction when the system pressure load is applied, so that the pressure lock ridge 174, 274 is arranged in a gap between the plug axis 14 and the peripheral wall of the through-hole 116, 216. As Figure 39 and 40 illustrated, the pressure lock ridge 174, 274 here blocks the radial expansion of the retaining arm 118, 218 into its tensioned state and / or the displacement of the retaining clip 120, 220 from the blocking position to the insertion position. By means of the pressure lock ridge 174, 274, an unintended loosening of the retaining clip 120, 220 or the mating plug connector 2 is prevented.

[0114] As Figure 39 and 40 illustrated, the retaining clip 220 is advantageously designed such that, when the mating plug connector 2 is completely inserted and under system pressure, the retaining clip 220 axially rests by means of the region of the side directed against the assembly direction M, which adjoins the pressure lock ridge 274, on the bearing surface of the clip cage directed in the assembly direction M and radially against the pressure lock ridge 274 against the peripheral wall of the through-hole 216.

[0115] It has proven advantageous for the base body 104, 204 or the clip cage 112, 212 to be dimensioned to have an insertion path for the plug axis 14. The insertion path U is exemplarily marked in Figure 37 and Figure 39 . Furthermore, the retaining clip 120, 220 advantageously has an axial play with respect to the clip cage 112, 212. Preferably, the axial play corresponds at least to the extent of the pressure lock ridge 174, 274 in the axial direction.

[0116] For the purpose of assembly, by means of the play of the retaining clip 120, 220 with respect to the clip cage 112, 212, the retaining clip 120, 220 can be moved from the insertion position to the blocking position. When the mating plug connector 2 is completely inserted into the through-hole 116, 216 and the required latching connection for establishing the fully latched position with the mating plug connector 2 by means of the retaining arm 118, 218, the mating plug connector 2 can move the retaining clip 120, 220 against the assembly direction M via the retaining arm 118, 218 by means of a restoring force directed against the assembly direction M acting on the mating plug connector 2 over its respective insertion path U. Figure 37 and Figure 38 The state of the complete insertion of the mating plug connector 2 into the plug connector is shown, including the insertion path U.Figure 39 and 40 A state after a restoring force directed against the assembly direction M is applied to the mating plug connector 2 and the retaining clip 220 is moved axially against the assembly direction M due to the play between the retaining clip 220 and the clip cage 212 is shown. The restoring force can be generated purposefully during assembly or can be generated by the system pressure during operation.

[0117] Advantageously, due to the axial displacement of the retaining clip 120, 220, as Figure 39 and 40 is shown, the press lock elevations 174, 274 are arranged radially next to the inner peripheral wall of the through hole 116, 216 and block the radial displacement of the retaining clip 120, 220 and the radial expansion of the retaining arms 118, 218. In order to release the latching connection or blocking caused by the press lock elevations 174, 274, the mating plug connector 2 is advantageously moved into the insertion position at least over the axial length of the press lock elevations 174, 274 in the assembly direction M, as shown in Figure 37 and Figure 38 , so that the press lock elevations 174, 274 and the inner peripheral wall of the through hole 116, 216 do not overlap. The elastic deformation of the retaining arms 118, 218 and the radial displacement of the retaining clip 120, 220 are released again.

[0118] In a specific embodiment of the retaining clip 220, a latching pin 280 directed radially to the through hole 216 is formed on the connection section 224, so that when the retaining clip 220 is in its blocking position, the latching pin 280 engages into a retaining groove of the mating plug connector 2 fully inserted into the plug connector 101, 201 and positively blocks the mating plug connector 2 against the assembly direction M. Such an embodiment of the retaining clip 220 with the latching pin 280 is shown as an example in Figure 36 . Advantageously, at least one press lock elevation 274 is provided on the latching pin 280 directed against the assembly direction M. In particular, the latching pin 280 increases the retaining force of the retaining clip 220 and relieves the load on the latching arms 218 when positively blocking the mating plug connector 2 against the assembly direction M.

[0119] As shown in Figure 2 , 17 and 35, in one preferred variant, the clip cage 12, 112, 212 has two windows 26, 126, 226 which are open radially to the through hole 16, 116, 216. Furthermore, it is preferred that a reinforcing strut 28, 128, 228 extending axially to the through hole 16, 116, 216 is arranged in the window. Corresponding to the advantageous embodiments, as Figure 5 , 8The holding arms 18, 118, 218 engage through the window 26, 126, 226 such that the holding arms 18, 118, 218 are arranged radially between the through-hole 16, 116, 216 and the reinforcing strut 28, 128, 228, as indicated by the examples in Figures 1 1, 14, 20, 20a, 23, 23a, 26, 26a, 29, 29a, 32, and 32a. In particular, the holding arms 18, 118, 218 project into the through-hole 16, 116, 216 of the cage 12, 112, 212 at least in the rest state, as indicated by the examples in Figures 1 1, 14, 20, 20a, 23, 23a, 26, 26a, 29, 29a, 32, and 32a. Figure 11 , 14 , 20, 29, and 32.

[0120] It is particularly advantageous if the base body 4 has four axial guide grooves 27 distributed over the circumference, which are arranged offset by 90° from one another and open against the assembly direction M. The reinforcing strut 28 is advantageously designed with a radial projection from the cage 12, such that the reinforcing strut 28 engages into the guide groove 27 and blocks a twisting for arranging the cage 12 in the receiving channel 10.

[0121] The reinforcing strut 28 is advantageously designed with a receptacle 29, such that in the state of assembly of the cage 12 in the receiving channel 10, the receptacle 29 ensures an advantageous distance between the collar of the cage 12 and the end of the base body 4 opposite the assembly direction M.

[0122] A further advantageous embodiment of the plug-in connector 1, 101, 201 is shown in Figure 6 , 9 , 12, 15, 21, 24, 27, 30, 33, and 35. According to this alternative embodiment, the sleeve section 8, 108, 208 and the cage 12, 112, 212 each have at least two openings 30, 130, 230 which are radial with respect to the assembly direction M. According to the shown embodiment, the openings 30, 130, 230 of the cage 12, 112, 212 and the sleeve section 8, 108, 208 are preferably arranged in the sleeve section 8, 108, 208 in alignment with one another, respectively, in the inserted state of the cage 12, 112, 212. The openings 30, 130, 230 are advantageously arranged with respect to one another such that the holding clip 20, 120, 220 and the bearing arm 22, 122, 222 are inserted radially into the through-hole 16, 116, 216 of the cage 12, 112, 212 along the assembly direction M through the openings 30, 130, 230 of the cage 12, 112, 212 and the sleeve section 8, 108, 208.

[0123] Figure 2 , 17Figures 35 show a preferred variant of the utility model, according to which the radially open window 26, 126, 226 for arranging and carrying the retaining arm 18, 118, 218 is arranged axially to the assembly direction M spaced apart from the opening 30, 130, 230 for arranging and carrying the support arm 22, 122, 222. The window 26, 126, 226 and the opening 30, 130, 230 are preferably arranged axially front to back around the through-hole, in particular without angular offset.

[0124] A further alternative embodiment is shown in Figure 3 、 6 , 9, 12, 15, 21, 24, 27, 30 and 33. The clamping cage 12, 112 advantageously has a radially outwardly directed latching device 32, 132. In particular, the support arm 22, 122, 222 has a support groove 34, 134, 234 which corresponds to the latching device 32, 132, in particular opens radially inwardly. In the rest state of the support arm 22, 122, 222 and in the insertion position of the retaining clip 20, 120, 220, the latching device 32, 132 is advantageously engaged into the support groove 34, 134, 234. When the support arm 22, 122, 222 is in the rest state, the latching device 32, 132 advantageously blocks the retaining clip 20, 120, 220 from being displaced from the insertion position to the blocking position in a form-locked manner. Figure 6 、 21 and 24 show the support arm 22, 122, 222 according to this variant of the utility model in the insertion position of the retaining clip 20, 120. In particular, Figure 35 the clamping cage 212 shown in Figure 36 or Figure 36a the retaining clip 220 shown in can be designed according to this embodiment.

[0125] In a further improved embodiment, the support arm 22, 122, 222 advantageously has a radially inwardly directed expansion device 36, 136, 236. This embodiment is shown in particular in Figure 3 、 6 , 9, 21, 24, 27, 30, 33 and 36. In the insertion position of the retaining clip 20, 120, 220 and in the rest state of the support arm 22, 122, 222, the expansion device 36, 136, 236 projects into the through-hole 16, 116, 216, as shown in Figure 6 、 21 and 24, so that the support arm 22, 122, 222 can be expanded from the rest state to a tensioned state via the expansion device 36, 136, 236 in the assembly direction M when the plug-in connector 2 is inserted. The support arm 22, 122 in the clamped state is shown in Figure 9 、 12 , 27, 30 and 33.

[0126] According to a preferred reaction of the radial elastic expansion of the support arms 22, 122, 222 into the tensioned state, in particular from Figure 9 , 12 , 27 and 30, it can be seen that the latching means 32, 132 are lifted out of the support slots 34, 134, 234. In particular, this advantageously releases the displacement of the retaining clip 20, 120, 220 from the insertion position to the blocking position.

[0127] A further embodiment of the utility model provides that the support slots 34 are arranged behind the expansion means in the extension direction of the support arms 22. This arrangement can be seen, for example, from Figure 3 . The positioning slots 38 are advantageously formed between the respective support slots 34 and the respective expansion means 36. Advantageously, the latching means 32 of the clip cage 12 are arranged in the positioning slots 38 in the rest state of the support arms 22 and in the blocking position of the retaining clip 20, such that in particular the expansion means 36 are supported on the outer circumference of the mating plug connector 2, in particular of the plug shaft 14, in a force-positive manner. Figure 15 This preferred arrangement of the latching means 32 in the positioning slots 38 and the support function of the expansion means 36 on the outer circumference of the plug shaft 14 is particularly advantageously shown. This embodiment, in particular the expansion means 36 supported on the outer circumference in a force-positive manner, particularly advantageously generates a resistance to the displacement of the retaining clip 20 from the blocking position to the insertion position.

[0128] In particular, as Figure 3 , 6 , 9, 12 and 15, the support arms 22 each have at least one expansion ramp 40a, 40b which rises towards the free end of the support arm 22. The expansion ramp 40a is advantageously open above the support slot 34, and the support slot 34 is preferably directly adjoined to the expansion ramp 40a.

[0129] Alternatively or additionally, the expansion ramp 40b is open above the positioning slot 38. According to a likewise preferred variant, the positioning slot 38 is directly adjoined to the expansion ramp 40b. Figure 3 , 6 , 9, 12 and 15, the expansion ramp 40b which is directly adjacent to the positioning slot 38 is also shown.

[0130] An alternative embodiment provides that the support slots 134, 234 are arranged in front of the expansion means 136, 234 in the extension direction of the support arms 122, 222. In particular, this embodiment is shown in Figure 21 , 24 , 27, 30, 33 and 36. In the rest state of the support arms 122, 222 and in the insertion position of the retaining clip 120, 220, the latching means 132 of the clip cage 112, 212 are advantageously arranged in the support slots 134, 234, asFigure 21 and 24 so that a resistance against the displacement of the retaining clip 120, 220 from the insertion position to the blocking position is generated.

[0131] It is particularly advantageous if the support arms 122, 222 each have at least one expansion ramp 140a, 140b raised towards the free end of the support arm 122, 222. This embodiment is shown by way of example in Figure 21 , 24 , 27, 30 and 33. In particular, the expansion ramp 140a opens above the support groove 134, 234, and the support groove 134, 234 adjoins the expansion ramp 140a. Additionally or alternatively, the expansion ramp 140b is formed on the expansion device 136, 236, wherein in particular in the rest state of the support arm 122, 222 and in the blocking position of the retaining clip 120, 220, as shown in Figure 33 , the expansion device 136, 236 is supported on the outer circumference of the mating plug connector 2 in a force-locking manner. This advantageously generates a resistance against the displacement of the retaining clip 120, 220 from the blocking position to the insertion position. In particular, the retaining clip 220 shown in Figure 36 and the clip cage 212 shown in Figure 35 can be designed according to this embodiment.

[0132] Advantageously, the support arms 122, 222 are designed such that the expansion device 136, 236 of the support arms 122, 222, as shown in Figure 21 , 24 , 27, 30 and 33, is arranged behind the central axis of the through-hole 116, 216 at least in the insertion position of the retaining clip 120, 220 in the direction pointing towards the free end of the support arm 122, 222. In particular, as shown in Figure 27 , 30 and 33, the expansion device 136, 236 is supported on the plug shaft 14 of the mating plug connector 2 when the mating plug connector 2 is inserted into the through-hole 116, 216, such that the plug shaft 14 is counter-locked by the support arms 122, 222. Due to the restoring force resulting from the radially elastic deformation, the expansion device 136, 236 presses onto the plug shaft 14 and generates a displacement force which pushes the connection section 124, 224 of the retaining clip 120, 220 in the direction of the central axis. In particular, the displacement force generated has the effect that the retaining clip 120, 220 is automatically transferred from the insertion position to the blocking position as soon as the plug shaft 14 is completely arranged in the through-hole 116, 216 and the retaining arm 118, 218 protrudes into the latching groove of the mating plug connector 2 in the rest state. In particular, Figure 36 the clip cage 212 shown in Figure 35 and the retaining clip 220 shown in can be designed according to this embodiment.

[0133] Furthermore, if retaining arms 18, 118, and 218 each have radially outwardly opening retaining grooves 42, 142, and 242 or contact surfaces 142a ( Figure 20a , 23a 26a, 29a, 32a) are advantageous for assembly and operational safety. The retaining grooves 42, 142, 242 or contact surfaces 142a are preferably designed as blocking devices 44, 144, 244 corresponding to the clamps 12, 112, 212, such that the blocking devices 44, 144, 244 are arranged in the retaining grooves 42, 142, 242 or contact surfaces 142a in the tensioned state of the retaining arms 18, 118, 218 and in the inserted position of the retaining clamps 20, 120, 220. Figure 5 , 8 In 11, 14, 20, 20a, 23, 23a, 26, 26a, 29, 29a, 32, and 32a, the retaining grooves 42, 142 or contact surfaces 142a and the 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. When the retaining arms 18, 118, and 218 are in the tensioned state and the retaining clips 20, 120, and 220 are in the inserted position, the blocking devices 44, 144, and 244 are advantageously arranged in the retaining grooves 42, 142, and 242 such that displacement of the retaining clips 20, 120, and 220 from the inserted position to the blocking position is prevented. The blocking devices 44, 144, and 244 here only help to ensure that the clips 20 will not open even under force, but will be firmly blocked.

[0134] In an optional variation of this 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, 228, 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.

[0135] Figure 20a , 23a Images 26a, 29a, 32a, and 36a show alternative constructions for the retaining arms 118 and 218 without outwardly protruding bearing elements. Due to the absence of the first groove wall of the retaining groove 142, in... Figure 20a , 23a In 26a, 29a, and 32a, the fixing groove 142 is transformed into a planar contact surface 142a. According to...Figure 36a In an alternative embodiment of the application, the unfolding of the holding arms 218 is supported via thickening 246a at the holding arms 218, respectively, instead of the bearing element 146. These thickening 246a can here still form the first groove wall (rear wall) of the holding groove 142.

[0136] In this alternative embodiment, the extension of the holding arms 118 is not functionally provided. The thickening 246a is therefore also functionally unnecessary. The blocking occurs only at the pressure protrusion 147 and, due to the smaller diameter, prevents the holding clip 20 from being pressed through. The blocking device 144 only additionally supports the holding arms 118 and thus additionally ensures the blocking, which prevents the pressing through. In particular, as shown in Figure 14 and 32 In the resting state of the holding arms 18, 118, 218 and the blocking position of the holding clip 20, 120, 220, the bearing element 46, 146, 246, as shown in Figs. 26a, 29a and 32a, respectively, is attached to the blocking device 44, 144, 244, respectively, radially outwardly to the through-hole 16, 116, 216, so that the radial expansion of the holding arms 18, 118, 218 and the transfer of the holding arms 18, 118, 218 from the resting state to the tension state are advantageously blocked.

[0137] In the alternative construction of the holding arms 118, 218 without outwardly protruding bearing elements, as shown in Figs. Figure 20a , 23a , 26a, 29a and 32a, the blocking of the holding arms 118 is here achieved by the contact of the contact surface 142a at the blocking device 144. This contact can be achieved by the holding arms 118 having a pressure protrusion 147 on the side thereof that is remote from the contact surface 142a. By this, the distance between the holding arms 118 is smaller than the outer diameter of the plug-in shaft 14 and provides an effect that prevents the holding clip 120 from being pulled in, the holding clip 120 now protruding from the inner side of the holding arms 118. That is, the distance between the holding arms is regionally smaller than the outer diameter of the plug-in shaft of the mating plug-in connector, for example due to the pressure protrusion arranged on the side remote from the contact surface. The plug-in shaft 14 presses on the pressure protrusion 147 of the holding arms 118, whereby the pressure protrusion 147 on the outer side comes to rest against the contact surface 142a at the blocking device 144. However, as mentioned above, the pressing does not have a primary intended function. It is only a secondary support of the holding arms 118.

[0138] 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.

[0139] Figure 5 , 8 A specific combination of features is shown in 11, 14, 20, 20a, 23, 23a, 26, 26a, 29, 29a, 32, 32a, 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 or at contact surface 142a in the stationary state of retaining arms 18, 118, and 215 and in the insertion position of retaining clamps 20, 120, and 220.

[0140] 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.

[0141] 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, 8, 11 and 12. As shown, the guide pin 56 is preferably arranged between the holding arms 18 and advantageously designed to extend parallel to the holding arms 18 to a bearing end. It has proven advantageous for the assembly safety that the guide pin 56, in the blocking position of the holding clip 20, bears with its bearing end against the outer circumference of the clip cage 12. This embodiment can also be combined with the plug-in connector 101, 201 shown in the embodiments Figures 16 to 40 .

[0142] According to a further development of the utility model, in particular as can be taken from Figure 14 , the clip cage 12 has a guide channel 58 designed to correspond to the guide pin 56. The guide pin 56 is preferably engaged into the guide channel 58 radially to the through-hole 16 at least in the blocking position of the holding clip 20. This embodiment can also be combined with the plug-in connector 101, 202 shown in the embodiments Figures 16 to 40 .

[0143] The guide channel 58 advantageously extends through two bearing seats 59. In particular, the bearing seats 59 are shown as Figure 2 . The bearing seats 59 are advantageously designed such that, in the state in which the clip cage 12 is assembled in the receiving channel 10, the bearing seats 59 ensure an advantageous distance between the collar of the clip cage 12 and the end of the base body 4 opposite the assembly direction M. This embodiment can also be combined with the plug-in connector 101, 202 shown in the embodiments Figures 16 to 40 .

[0144] It is particularly advantageous, as shown in Figure 4 , 7 , 10, 13, 19, 22, 25, 28, 31 and 34, that at least one sealing element 60, 160, in particular an O-ring, is arranged in the receiving channel 10, 110. Preferably, according to an embodiment not shown, two sealing elements 60, 160 are arranged in the receiving channel 10, 110. In particular, the plug-in connector 201 shown in Figure 37 and Figure 39 can be designed according to this embodiment.

[0145] The sealing elements 60, 160 are advantageously arranged between the side wall of the clip cage 12, 112 pointing in the assembly direction M and a step face pointing against the assembly direction M and extending perpendicularly from the inner wall of the receiving channel 10, 110 circumferentially.

[0146] The sealing elements 60, 160 are particularly advantageously used for a circumferential seal of the plug-in shaft 14 relative to the sleeve section 8, 108 or the inner wall of the receiving channel 10, 110.

[0147] Three-part seals (not shown) have proven to be particularly advantageous. Thus, the seal advantageously has two sealing elements 60, 160, in particular O-rings, which are separated from one another by a spacer ring. This three-part assembly is advantageously assembled in the receiving channel 10, 110 in the manner described above.

[0148] According to particularly preferred embodiments of the utility model shown in particular in Figure 18 , 20 , 20a, 23, 23a, 26, 26a, 29, 29a, 32, 32a, 36 and 36a, the retaining clip 120, 220 has at least one, in particular two, opposing radially resilient clamping arms 166, 266. The clamping arms 166, 266 extend from a section formed on the connecting section 124, 224 and / or the retaining arm 118, 218 in the direction of the free end of the retaining arm 118, 218. The clamping arms 166, 266 are advantageously radially spaced apart from the retaining arm 118, 218, in particular such that the clamping arms 166, 266 can be elastically deformed towards the retaining arm 118, 218 with a force acting radially onto the end section. The clamping arms 166, 266 improve the clamping of the retaining clip 120, 220 here, which is particularly advantageous for the transition of the retaining clip 120, 220 from the blocking position into the insertion position. The embodiments of the utility model having clamping arms 166, 266 can also advantageously be combined with the exemplary embodiments of the plug connector 1 shown in Figures 1 to 15 .

[0149] In particular, the clamping cage 112, 212 is held in a form-locked manner by at least one radially resilient latching arm 168, 268, which has a latching continuation 170, 270 projecting radially outwards, which in the inserted state engages in a form-locked manner into a recess 172 in the peripheral wall of the sleeve section 108, 208. This embodiment of the clamping cage 112, 212 is shown in particular in Figure 17 and 35 . The latching arm 168, 268 is advantageously formed on the outer periphery of the clamping cage 112, 212 here.

[0150] In particular, in a preferred variant of the utility model, the clamping cage 112 is held in a form-locked manner by at least two radially resilient latching arms 168, which have a latching continuation 170 projecting radially outwards, which in the inserted state engages in a form-locked manner into a recess 172 in the peripheral wall of the sleeve section 108. This embodiment corresponds to the embodiment variant of the clamping cage 112 shown in Figure 17 . The plug connector 101 suitable for this purpose is shown by way of example in Figure 1 , whereby this embodiment of the utility model can also advantageously be combined with the exemplary embodiments of the plug connector 1 shown in Figures 1 to 15The exemplary embodiment of the plug-in connector 1 shown in the middle is combined. In particular, the latching arms 168 are formed on the outer circumference of the collet 112.

[0151] A further advantageous embodiment for arranging the collet 212 in the sleeve section 208 provides that the retaining clips 220 located between the support arms 222 have at least one pin 276 projecting radially to the through-hole 216, wherein the sleeve section 208 and the collet 212 each have at least one through-opening which is radial with respect to the assembly direction M. These embodiments of the collet 212 and the retaining clips 220 are shown in particular in Figure 35 、 36 and 36a. Advantageously, in the state in which the collet 212 is inserted in the sleeve section 208, the through-openings of the collet 212 and the sleeve section 208 are each arranged in alignment with one another, in particular, such that the retaining clips 220 with the pins 276 can be inserted radially to the assembly direction M through the through-openings of the collet 212 and the sleeve section 208. Particular embodiments of the pins 276 are shown in Figure 36 . This embodiment provides that the latching pins 280 are arranged axially offset with respect to the assembly direction from the pins 276.

[0152] One advantageous variant provides that, as shown in Figure 35 , the collet 212 is formed with radially resilient latching arms 268 opposite the through-opening radially to the through-hole 216, which have latching continuations 270 projecting radially outward on the outer circumference, which in the inserted state latchingly engage in recesses in the peripheral wall of the sleeve section 208.

[0153] The insertion and assembly of the mating plug-in connector 2 is explained below using the advantageous embodiments shown in Figures 4 to 15 and Figures 19 to 34 (including Figure 20a 、 23a , 26a, 29a and 32a, which are similar to Figure 20 、 23 , 26, 29 and 32, are not explained individually below). The insertion and assembly process of the variants of the collet 212 and the retaining clips 220 of the plug-in connector 201 shown in Figures 35 to 40 is not different from the insertion and assembly process according to Figures 19 to 34 , the illustration of which is omitted.

[0154] Figures 19 to 21 (including Figure 20a) shows the plug connector 101 with the mating plug connector 2 not assembled and the retaining clip 20 in the insertion position. The retaining arm 118 and the support arm 122 are in the rest state here. In particular, the support arm 122 blocks the cooperation of the latching means 132 of the clip cage 112 against the displacement of the retaining clip 120 from the insertion position into the blocking position. At the same time, the retaining clip 120 is fixed against falling out of the base body 104 and / or the clip cage 112. These conditions also apply to the plug connector 1 with the mating plug connector 2 not assembled, corresponding to Figures 16 to 34 the embodiment shown.

[0155] Figures 4 to 6 and Figures 22 to 24 (including Figure 23a ) shows the plug connector 1, 101 with the mating plug connector 2 partially inserted in the assembly direction M and the retaining clip 20, 120 in the insertion position. During the insertion, the mating plug connector 2 is inserted with its plug axis 14 into the through-hole 16, 116 in the assembly direction M. The plug axis 14 here passes through a section in the through-hole 16, 116, in which the retaining arm 18, 118 projects into the through-hole 16, 116, as shown in Figures 4 to 6 and Figures 22 to 24 . The plug axis 14 and the retaining arm 18, 118 are advantageously designed to correspond to one another such that the plug axis 14 exerts a force acting radially outwards on the retaining arm 18, 118 in the assembly direction M. Alternatively, the side pointing against the assembly direction M can have an insertion ramp increasing in the insertion direction in order to better insert the plug axis 14. Due to the outwards acting force, the retaining arm 18, 118 and the support arm 22, 122 are each elastically deformed radially outwards from the rest state into the tensioned state.

[0156] Figure 5 and Figure 23 shows the retaining arm 18, 118 in the tensioned state in this state. Here, the advantageous blocking means 44, 144 are arranged in the retaining groove 42, 142 or the contact face 142a of the retaining arm 18, 118 and prevent the retaining clip 20, 120 from being transferred from the insertion position into the blocking position.

[0157] In Figure 23a , there is no tension state for the retaining arm 118, only a blocking state due to the geometric blocking, and the retaining clip 20 is not deformed. Only when a force is exerted on the operating face of the retaining clip 20 does a tension state arise.

[0158] Figure 6 and Figure 24The 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.

[0159] like Figures 7 to 9 and Figures 25 to 27 (include Figure 26a 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 27 The 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.

[0160] like Figures 10 to 12 and Figures 28 to 30 (include Figure 29a 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.

[0161] As Figures 13 to 15 and Figures 31 to 34 shown, the mating plug connector 2 is fully inserted into the through-hole 16, 116 of the clamping cage 12, 112 in the assembly direction M, without change compared to the assembly state shown in Figure 32a and Figures 10 to 12 As Figures 28 to 30 , Figure 14 , 15 , 32 and 33, the retaining clip 20, 120 is advantageously in the blocking position here. Figure 14 and Figure 29 It is shown that the retaining arm 18, 118 is still in the rest state, but due to the displacement of the retaining clip 20, 120 into the blocking position, the retaining arm 18, 118 with the bearing element 46, 146 is resting against the blocking device 44, 144, so that the radial deformation of the retaining arm 18, 118 is blocked. As Figure 15 and Figure 33 shown, the bearing arm 22, 122 is also in the rest state, wherein the latching device 32 of the clamping cage 12 is arranged in the positioning groove 38 of the bearing arm 22, in particular in the advantageous embodiment shown in Figure 15 .

[0162] Furthermore, as Figure 15 and Figure 33 shown, the bearing arm 22, 122 and its expansion device 36, 136 are resting against the outer circumference of the plug shaft 14, which creates additional position security. Furthermore, the preferably expanding bevels 40a, 40b act onto the latching device 32, 132 or onto the outer circumference of the plug shaft 14 in a way that creates a resistance which acts against the displacement of the retaining clip 20, 120 from the blocking position into the insertion position.

[0163] In a preferred embodiment, the retaining clip 20 advantageously has a surface structure 62 on the connection section 24, as Figure 3 shown. This surface structure 62 is particularly advantageous for manually exerting a compression force onto the retaining clip 20 to displace the retaining clip 20 into the assembly position. This embodiment can also be combined with the embodiment of the plug connector 101 shown in Figure 16 to 34 .

[0164] In order to be able to remove the mating plug connector 2 from the through-hole 16, 116 against the assembly direction M, the retaining clip 20, 120 has to be moved in the direction of the insertion position against the resistance created by the expanding bevels 40a, 40b, 140a, 140b. By the interaction of the latching device 32, 132 and the expanding bevels 40a, 140a or the interaction of the expanding bevels 40b, 140b with the outer circumference of the plug shaft 14, the bearing arm 22, 122 is elastically expanded.

[0165] In order to move the retaining clip 20, 120 into the insertion position, it has proven advantageous if a radially outwardly acting pulling force is applied to the connection section 24, 124 of the retaining clip 20, 120. As shown in Figure 3 for this purpose, the retaining clip 20 can have an action profile 64 on the connection section 24, by which the retaining clip 20 can be particularly advantageously levered radially outwardly. In addition or alternatively, the retaining clip 20, 120 can have at least one clamping arm 166, as shown by way of example in Figure 18

[0166] Once the retaining clip 20, 120 is again arranged in the insertion position, the plug-in shaft 14 can be pulled out of the through-hole 16, 116 against the assembly direction M, wherein the retaining arms 18, 118 expand again into the tensioned state due to the cooperative interaction of the retaining arms 18, 118 and the plug-in shaft 14 of the mating plug-in connector 2.

[0167] In the embodiment with bearing elements 46, 146, 246, the flexible retaining arms 18, 118, 218 unfold when the connection is disassembled by pulling out the plug-in shaft 14. In the process of unfolding, the sharp edge of the latching groove slides over the chamfer of the retaining arm 118, which leads to abrasion occurring at the retaining arm 118. The advantage of the alternative embodiment without bearing elements 46, 146 and 246 is that the retaining arm 118, which is no longer unfoldable or only slightly unfoldable when the plug-in shaft 14 is detached from the coupling part, no longer slides over the sharp edge of the latching groove on the plug-in shaft 14, thus acting to reduce abrasion.

[0168] Since the fixed region of the retaining clip 20 now lies completely within the semicircular region between the pressure bumps 147, the retaining clip 20 is removed radially from the retaining groove 142 when the connection is cancelled, so that the alternative embodiment greatly reduces abrasion. Thereby, the fixed region of the retaining clip 20, which is configured as a clip, is removed from the latching groove 142 in the pressed-out state. In other embodiments, the sliding during disassembly is caused by the functional unfolding of the retaining arm 118, which blocks, while in the alternative variant the unfolding does not cause a blockage, so that in the pressed-out state the front region of the retaining clip 20 is open and there is no more sliding of the shaft over the retaining arm 118. It can thus be said that there is no abrasion.

[0169] ​The utility model is not limited to the exemplary embodiments shown and described, but also includes all embodiments having the same effect within the meaning of the utility model. It is expressly stated that the exemplary embodiments are not limited to the combination of all features; on the contrary, each individual sub-feature can have inventive significance in itself, even independently of all other sub-features. Furthermore, the utility model is also not limited to the combination of the features defined in the utility model, but can also be defined by any other combination of certain features of all the individual features disclosed as a whole. This means that, in principle, virtually every individual feature of the utility model can be omitted or replaced by at least one individual feature disclosed elsewhere in the present application.

[0170] List of Reference Signs

[0171] 1, 101, 201 plug-in connector

[0172] 2 mating plug-in connector

[0173] 4, 104, 204 base body

[0174] 6, 106, 206 through passage

[0175] 8, 108, 208 sleeve section

[0176] 10, 110, 210 receiving channel

[0177] 12, 112, 212 cage

[0178] 14 plug-in shaft

[0179] 16, 116, 216 through hole

[0180] 18, 118, 218 holding arm

[0181] 20, 120, 220 holding clip

[0182] 22, 122, 222 support arm

[0183] 24, 124, 224 connection section

[0184] 26, 126, 226 window

[0185] 27 guide slot

[0186] 28, 128, 228 reinforcing strut

[0187] 29 receptacle

[0188] 30, 130, 230 opening

[0189] 32, 132 latching device

[0190] 34, 134, 234 support groove

[0191] 36, 136, 236 expansion device

[0192] 38 positioning groove

[0193] 40a, 40b, 140a, 140b expansion bevel

[0194] 42, 142, 242 holding groove

[0195] 142a 118 contact surface for 144

[0196] 44, 144, 244 blocking device

[0197] 46, 146, 246 support element

[0198] 246a thickening at 218

[0199] 147 pressure bump

[0200] 48, 148, 248 bevel

[0201] 50 support arm

[0202] 52 support head

[0203] 54 head receiving portion

[0204] 56 guide pin

[0205] 58 guide channel

[0206] 59 support seat

[0207] 60, 160 sealing element

[0208] 62 surface structure

[0209] 64 active contour

[0210] 166, 266 clamping arm

[0211] 168, 268 latching arm

[0212] 170, 270 latching continuation

[0213] 172 recess

[0214] 174, 274 pressure latching ridge

[0215] 276 pin

[0216] 278 through opening

[0217] 280 detent

[0218] U insertion path

[0219] M assembly direction

Claims

1. Plug connector (1, 101, 201) with assembly lock for connecting a first fluid line to a mating plug connector (2), having a base body (4, 104, 204) with a through channel (6, 106, 206), wherein the through channel (6, 106, 206) is fluidically connected to an end of the base body (4, 104, 204) designed as a sleeve section (8, 108, 208), wherein a cage (12, 112, 212) is arranged in a receiving channel (10, 110, 210) of the sleeve section (8, 108, 208), wherein the cage (12, 112, 212) can be inserted into the receiving channel (10, 110, 210) of the sleeve section (8, 108, 208) in an assembly direction (M) and is axially held in shape with respect to the assembly direction (M), wherein two holding arms (18, 118, 218) of a holding clip (20, 120, 220) which can be inserted into the cage (12, 112, 212) perpendicularly to the assembly direction (M) extend in a rest state of the holding arms (18, 118, 218) into a through-hole (16, 116, 216) of the cage (12, 112, 212) and are designed to be able to be elastically expanded radially to the through-hole (16, 116, 216) into a tensioned state, wherein the holding clip (20, 120, 220) is designed to be able to be displaced radially with respect to the through-hole (16, 116, 216) from an insertion position into a blocking position and from the blocking position into the insertion position, wherein the holding arms (18, 118, 218) can be expanded into their tensioned state and the holding arms (18, 118, 218) block in the blocking position of the holding clip (20, 120, 220) against expansion into the tensioned state, characterized in that the holding clip (20, 120, 220) has two support arms (22, 122, 222) which are elastic radially to the through-hole (16, 116, 216) and which axially fix the cage (12, 112, 212) in shape in the receiving channel (10, 110, 210) to the assembly direction (M) and in a rest state of the support arms (22, 122, 222) extend into the through-hole (16, 116, 216) and are designed to be able to be elastically expanded radially to the through-hole (16, 116, 216) into a tensioned state.

2. Plug connector (1, 101, 201) according to claim 1, characterized in that when the support arms (22, 122, 222) are in the rest state and the holding clip (20, 120, 220) is in the insertion position, the holding clip (20, 120, 220) is blocked from being displaced from the insertion position into the blocking position.

3. Plug connector (1, 101, 201) according to one of the preceding claims, characterized in that the retaining clip (20, 120, 220) is blocked from displacement from the insertion position into the blocking position when the retaining arm (18, 118, 218) is in the tensioned state and the retaining clip (20, 120, 220) is in the insertion position.

4. Plug connector (1, 101, 201) according to claim 1, characterized in that the retaining clip (20, 120, 220) is force-positive blocked from displacement from the blocking position into the insertion position when the support arm (22, 122, 222) is in the rest state and the retaining clip (20, 120, 220) is in the blocking position.

5. Plug connector (1, 101, 201) according to claim 1, characterized in that the retaining clip (20, 120, 220) is U-shaped and the support arm (22, 122, 222) is connected to the retaining arm (18, 118, 218) by a connecting section (24, 124, 224) and extends from the connecting section (24, 124, 224) in the same direction to a free end, respectively, and the support arm (22, 122, 222) and the retaining arm (18, 118, 218) are arranged axially spaced apart.

6. Plug connector (1, 101, 201) according to claim 1, characterized in that the retaining clip (20, 120, 220) has at least two press-lock elevations (174, 274) formed on the retaining arm (18, 118, 218) and / or on a connecting section (24, 124, 224) on a side facing away from the assembly direction (M), which are designed to protrude in the direction opposite to the assembly direction (M) such that in the blocking position of the retaining clip (20, 120, 220) the press-lock elevations (174, 274) can be supported radially on an inner peripheral wall of the through-hole (16, 116, 216).

7. Plug connector (1, 101, 201) according to claim 6, characterized in that the two press-lock elevations (274) on the retaining arm (18, 118, 218) are designed and arranged opposite to each other such that in the blocking position of the retaining clip (20, 120, 220) and in the rest state of the retaining arm (18, 118, 218) the press-lock elevations (274) are arranged on a symmetry axis of the through-hole (16, 116, 216) within the through-hole (16, 116, 216).

8. Plug connector (1, 101, 201) according to claim 1, characterized in that The collet (12, 112, 212) has two windows (26, 126, 226) which open radially to the through-hole (16, 116, 216) and a reinforcing strut (28, 128, 228) which extends axially to the through-hole (16, 116, 216) is arranged in each case 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 arranged radially between the through-hole (16, 116, 216) and the reinforcing strut (28, 128, 228) and in the rest state protrude into the through-hole (16, 116, 216) of the collet (12, 112, 212).

9. Plug connector (1, 101, 201) according to Claim 1, characterized in that the sleeve section (8, 108, 208) and the collet (12, 112, 212) each have at least two openings (30, 130) which are radial with respect to the assembly direction (M), wherein the openings (30, 130) of the collet (12, 112, 212) and of the sleeve section (8, 108, 208) are arranged in each case in the sleeve section (8, 108, 208) in alignment with one another in the inserted state of the collet (12, 112, 212) such that the retaining clip (20, 120, 220) and the bearing arm (22, 122, 222) can be inserted into the through-hole (16, 116, 216) of the collet (12, 112, 212) along the assembly direction (M) radially through the openings (30, 130) of the collet (12, 112, 212) and of the sleeve section (8, 108, 208).

10. Plug connector (1, 101, 201) according to Claim 9, characterized in that the radially open windows (26, 126, 226) for arranging and carrying the retaining arms (18, 118, 218) are arranged axially to the assembly direction (M) spaced apart from the openings for arranging and carrying the bearing arms (22, 122, 222).

11. Plug connector (1, 101, 201) according to Claim 1, characterized in that The clamping cage (12, 112, 212) has radially outwardly directed latching means (32, 132) and the support arm (22, 122, 222) has a corresponding support groove (34, 134, 234), and the latching means (32, 132) engages into the support groove (34, 134, 234) in the rest state of the support arm (22, 122, 222) and in the insertion position of the retaining clip (20, 120, 220) and blocks displacement of the retaining clip (20, 120, 220) from the insertion position to the blocking position in the rest state of the support arm (22, 122, 222).

12. Plug connector (1, 101, 201) according to claim 1, characterized in that the support arm (22, 122, 222) has radially inwardly directed expansion means (36, 136, 236) and the expansion means (36, 136, 236) projects into the through-hole (16, 116, 216) in the insertion position of the retaining clip (20, 120, 220) and in the rest state of the support arm (22, 122, 222) such that the support arm (22, 122, 222) can be expanded from the rest state to a tensioned state by the expansion means (36, 136, 236) in the assembly direction (M) upon insertion of the mating plug connector (2), thereby releasing displacement of the retaining clip (20, 120, 220) from the insertion position to the blocking position.

13. Plug connector (1) according to claim 12, characterized in that a support groove (34) is arranged behind the expansion means (36) in the extension direction of the support arm (22) and a positioning groove (38) is formed between the respective support groove (34) and the respective expansion means (36) and the latching means (32) of the clamping cage (12) is arranged in the positioning groove (38) in the rest state of the support arm (22) and in the blocking position of the retaining clip (20) such that the expansion means (36) bears on the outer circumference of the mating plug connector (2) in a force-positive manner and exerts a resistance to displacement of the retaining clip (20) from the blocking position to the insertion position.

14. Plug connector (1) according to claim 13, characterized in that the support arm (22) each has at least one expansion ramp rising towards the free end of the support arm (22), wherein the expansion ramp opens above the support groove (34) and the support groove (34) directly adjoins the expansion ramp and / or the expansion ramp opens above the positioning groove (38) and the positioning groove (38) directly adjoins the expansion ramp.

15. Plug connector (101, 201) according to claim 12, characterized in that A support groove (134) is provided in front of the expansion means (136, 236) in the direction of extension of the support arm (122, 222), and the latching means (132) of the clamping cage (112, 212) are arranged in the support groove (134, 234) in the rest state of the support arm (122, 222) and in the insertion position of the retaining clip (120, 220), thereby creating a resistance against displacement of the retaining clip (120, 220) from the insertion position to the blocking position.

16. Plug connector (101, 201) according to claim 15, characterized in that the support arm (122, 222) each has at least one expansion ramp rising towards the free end of the support arm (122, 222), wherein the expansion ramp opens above the support groove (134, 234) and the support groove (134, 234) directly adjoins the expansion ramp and / or the expansion ramp is formed on the expansion means (136, 236), wherein in the rest state of the support arm (122, 222) and in the blocking position of the retaining clip (120, 220) the expansion means (136, 236) can be supported in a force-shape-locking manner on the outer circumference of the mating plug connector (2), thereby creating a resistance against displacement of the retaining clip (120, 220) from the blocking position to the insertion position.

17. Plug connector (101, 201) according to claim 15, characterized in that the support arm (122, 222) are designed such that the expansion means (136, 236) of the support arm (122, 222) are arranged behind the central axis of the through-hole (116, 216) at least in the insertion position of the retaining clip (120, 220) respectively in a direction pointing towards the free end of the support arm (122, 222).

18. Plug connector (1, 101, 201) according to claim 1, characterized in that the retaining arm (18, 118, 218) each form a retaining groove (42, 142, 242) opening radially outwards or a radially outer contact surface (142a), which is designed to correspond to the blocking means (44, 144, 244) of the clamping cage (12, 112, 212) such that in the tensioned state of the retaining arm (18, 118, 218) and in the insertion position of the retaining clip (20, 120, 220) the blocking means (44, 144, 244) are arranged in the retaining groove (42, 142, 242) or the radially outer contact surface (142a), thereby blocking or at least hindering displacement of the retaining clip (20, 120, 220) from the insertion position to the blocking position.

19. Plug connector (1, 101, 201) according to claim 18, characterized in that The first groove wall of the retaining groove (42, 142, 242) is designed to point from a bearing element (46, 146, 246) or from a thickening (246a) to the free end of the retaining arm (18, 118, 218), which projects radially outward from the retaining arm (18, 118, 218), wherein in the resting state of the retaining arm (18, 118, 218) and in the blocking position of the retaining clip (20, 120, 220), the bearing element (46, 146, 246) or the thickening (246a) bears radially outwardly against the blocking device (44, 144, 244) on the through-hole (16, 116, 216), thereby blocking the radial expansion of the retaining arm (18, 118, 218) and the transition of the retaining arm (18, 118, 218) from the resting state to the tensioned state.

20. Plug connector (1, 101, 201) according to claim 18, characterized in that the distance between the retaining arms (118) is regionally smaller than the outer diameter of the plug axis (14) of the mating plug connector (2).

21. Plug connector (1, 101, 201) according to claim 18, characterized in that the reinforcing strut (28, 128, 228) serves as a blocking device (44, 144, 244), so that the reinforcing strut (28, 128, 228) designed as the blocking device (44, 144, 244) is arranged in the retaining groove (42, 142, 242) in the resting state of the retaining arm (18, 118, 218) and in the insertion position of the retaining clip (20, 120, 220).

22. Plug connector (1, 101, 201) according to claim 1, characterized in that the retaining clip (20) has at least one support arm (50) arranged between the bearing arms (22) and designed to extend parallel to the bearing arms (22) to a support head (52), wherein in the blocking position of the retaining clip (20), the support head (52) is arranged in a correspondingly designed head receptacle (54) in the outer circumference of the clip cage (12).

23. Plug connector (1, 101, 201) according to claim 1, characterized in that 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 bearing end, wherein in the blocking position of the retaining clip (20), the guide pin (56) bears with its bearing end on the outer circumference of the clip cage (12).

24. Plug connector (1, 101, 201) according to claim 23, characterized in that The clamping cage (12) has a guide channel (58) designed to correspond to the guide pin (56), which engages into the guide channel radially to the through-hole (16) in the blocking position of the retaining clip (20).

25. Plug connector (1, 101, 201) according to one of claims 5 to 24, characterized in that The retaining clip (120, 220) has at least one opposite radially resilient clamping arm (166) which extends from a section formed onto the connection section (124, 224) and / or the retaining arm (118, 218) in the direction of the free end of the retaining arm (118, 218), wherein the clamping arm (166) is radially spaced apart from the retaining arm (118, 218) with an end section, such that the clamping arm (166) can be elastically deformed towards the retaining arm (118, 218) with a force acting radially onto the end section.

26. Plug connector (1, 101, 201) according to claim 1, characterized in that The clamping cage (112, 212) is held positively by at least one radially resilient latching arm (168, 268) which has a latching continuation (170, 270) projecting radially outwards, which positively engages in a recess (172) in the inserted state, the recess being in the peripheral wall of the sleeve section (108, 208), wherein the latching arm (168, 268) is formed on the outer periphery of the clamping cage (112, 212).

27. Plug connector (101) according to claim 26, characterized in that The clamping cage (112) is held positively by at least two radially resilient latching arms (168) which have a latching continuation (170) projecting radially outwards, which positively engages in a recess (172) in the inserted state, the recess being in the peripheral wall of the sleeve section (108), wherein the latching arms (168) are formed on the outer periphery of the clamping cage (112).

28. Plug connector (201) according to claim 1, characterized in that The retaining clip (220) located between the support arms has at least one pin (276) projecting radially to the through-hole (216), wherein the sleeve section (208) and the clip cage (212) each have at least one through-opening (278) which is radial with respect to the assembly direction (M), wherein the through-openings (278) of the clip cage (212) and of the sleeve section (208) are respectively arranged in the sleeve section (208) in alignment with one another in the inserted state of the clip cage (212), so that the retaining clip (220) can be inserted through the through-openings (278) of the clip cage (212) and of the sleeve section (208) radially to the assembly direction (M) by means of the pin (276).

29. Plug connector (201) according to claim 28, characterized in that the clip cage (212) is formed with a radially resilient latching arm (268) opposite the through-opening (278) radially to the through-hole (216), which has a latching continuation (270) projecting radially outward on the circumference, which latching continuation engages in a form-locking manner into a recess in the peripheral wall of the sleeve section (208) in the inserted state.

30. Plug connector (1, 101, 201) according to claim 1, characterized in that the retaining arms (18, 118, 218) can be expanded into their tensioned state in the inserted position of the retaining clip (20, 120, 220).

31. Plug connector (1, 101, 201) according to claim 7, characterized in that the axis of symmetry extends perpendicular to the displacement direction of the retaining clip (20, 120, 220).

32. Plug connector (1, 101, 201) according to claim 10, characterized in that the window (26, 126, 226) and the opening (30, 130) are arranged axially before and after the through-hole (16, 116, 216).

33. Plug connector (1, 101, 201) according to claim 20, characterized in that the distance between the retaining arms (118) is regionally smaller than the outer diameter of the plug axis (14) of the mating plug connector (2) due to the pressure beads (147) arranged on the side of the retaining arms (118) facing away from the contact surface (142a).

34. Plug connector (1, 101, 201) according to claim 22, characterized in that the retaining clip (20) has two support arms (50).

35. Plug connector (1, 101, 201) according to claim 25, characterized in that the retaining clip (120, 220) has two opposite radially resilient clamping arms (166).

Images