Connection system for conducting fluid, corresponding method, connection element, insertion part and cover element

Abstract

The present invention relates to a connection element (101) for fluid-conducting connection to an insertion part (111). The connection element (101) comprises a main body (103) and a securing system (105), wherein the main body (103) comprises a fluid channel and a receptacle (113) for receiving the insertion part (111), wherein the securing system (105) is arranged on the main body (103) and is configured to secure the insertion part (111) in the receptacle (113) in a predefineable position relative to the fluid channel in order to provide a fluid-conducting connection between the connection element (101) and the insertion part (111), wherein the securing system (105) comprises a first securing element (107) and a second securing element (109).

Description

[0001] Connection system for conducting fluid

[0002] The invention presented relates to a connecting element for fluid-conducting connection with a plug-in part, a plug-in part, a connection system comprising the connecting element and the plug-in part, a method for reversibly providing a fluid-conducting connection and a cover element according to the appended claims.

[0003] To provide a fluid-conducting connection for, for example, coolant in a vehicle, connection systems are known, for example from DE 102004 062 887 B3, in which couplings are secured to a plug-in part using one-piece locking elements. Releasing such a connection usually requires considerable force, which must be applied using a tool.

[0004] Furthermore, in a connection system with a one-piece securing element, each plug-in part must be inserted into the coupling in exactly a specified position to ensure that the plug-in part is correctly secured in the coupling.

[0005] Against this background, it is an object of the invention presented to provide a possibility for the simple and reliable provision of a fluid-conducting connection.

[0006] Thus, according to a first aspect of the invention presented, a connecting element for fluid-conducting connection with a plug-in part is presented.The presented connecting element comprises a base body and a securing system, wherein the base body comprises a fluid channel and a receptacle for receiving the plug-in part, wherein the securing system is arranged on the base body and configured to secure the plug-in part in a predetermined position relative to the fluid channel in the receptacle in order to provide a fluid-conducting connection between the connecting element and the plug-in part, wherein the securing system comprises a first securing element and a second securing element, wherein the first securing element is movable between a lower position and an upper position, wherein the second securing element is movable between an upper position and a lower position, wherein the second securing element can be reversibly mechanically coupled to the first securing element via a number of coupling elements.can be coupled, wherein the number of coupling elements are movable between a coupling position and a release position, wherein the number of coupling elements in their coupling position transmit a movement of the first securing element to the second securing element, so that the first securing element moves the second securing element in the direction of its lower position, in particular into its lower position, when the pressure element of the plug-in part moves the first securing element into its lower position when the plug-in part moves along a predetermined trajectory through the base body, and the number of coupling elements release a movement of the first securing element into its upper position when the pressure element moves further along the predetermined trajectory through the base body into the second securing element.

[0007] In the context of the invention presented, a receptacle for a plug-in part is to be understood as a recess in the base body of the connecting element presented, into which the plug-in part can be introduced, in particular inserted, so that the base body encloses the plug-in part at least in regions and in particular in a fluid-tight manner.

[0008] In the context of the invention presented, an upper position of the first securing element is understood to mean a position of the first securing element in which the first securing element partially overlaps the receptacle of the base body. Correspondingly, an upper position of the first securing element is understood to mean a position opposite the lower position, i.e., a position in which the first securing element does not overlap the receptacle. In particular, the lower position of the first securing element is at the bottom in the direction of gravity, and the upper position of the first securing element is at the top in the direction of gravity. In particular, the first securing element is pressed into its upper position by optional spring elements.

[0009] In the context of the invention presented, a lower position of the second securing element is to be understood as a position of the second securing element in which the second securing element partially overlaps the receptacle of the base body. In particular, the lower position of the second securing element is at the bottom in the direction of gravity and the upper position of the second securing element is at the top in the direction of gravity. The connecting element presented is based on the principle that a plug-in part introduced into the connecting element is secured in the connecting element by means of a securing system which comprises two securing elements. The two securing elements are separate components and can be moved relative to one another in at least one state of the connecting element, so that they can be moved at least temporarily independently of one another at different times during a connecting process and, for example,the plug-in part can first be aligned in the connecting element by means of the first securing element and then finally fixed in the connecting element by means of the second securing element.

[0010] Furthermore, the first securing element and the second securing element are or can be coupled to one another in a mechanically reversible manner, such that a movement of the first securing element leads to a movement of the second securing element of the securing system. The securing system is arranged in the base body in such a way that the second securing element can only be moved towards its lower position when the first securing element is moved into its lower position by an insert which moves through the base body or in the base body on a predetermined trajectory, i.e. in a correctly predetermined position or relative alignment to the base body. Accordingly, the securing system only secures the insert in the base body when the insert is correctly seated or has been inserted into the base body in a correct or predetermined position, such that an incorrect, possiblyThe insertion part is prevented from fitting into the base body, which could lead to leakage.

[0011] It can be provided that the first securing element comprises a number of spring elements which are configured to press the first securing element from its lower position into its upper position.

[0012] Spring elements, such as elastic arms, cause the first securing element to move automatically into its upper position by pressing against a wall of the base body.

[0013] It can further be provided that the second securing element is movable between its upper position, its lower position, and an intermediate position when the plug-in part moves through the base body, wherein the second securing element is in its intermediate position between its upper position and its lower position and allows movement of the plug-in part through the base body. An intermediate position of the second securing element enables a release state in which the receptacle of the base body is not obstructed by either the first securing element or the second securing element, so that a plug-in part can be removed from the base body.

[0014] It can further be provided that the first securing element comprises adjacent arms which surround the receptacle of the base body, wherein a number of coupling elements are arranged on each of the arms, wherein the number of coupling elements are movable between a release position and a coupling position, and the coupling elements are aligned towards one another in their coupling position and are aligned further away from one another in the release position than in the coupling position, wherein the second securing element comprises a number of arms, each of which comprises a receptacle for engaging a coupling element of the number of coupling elements of the first securing element, so that the number of coupling elements block a movement of the second securing element relative to the first securing element,when the number of coupling elements are in their coupling position and release a movement of the second securing element relative to the first securing element when the number of coupling elements are in their release position.,

[0015] By means of coupling elements of the first securing element which interact with arms of the second securing element, a coupled or coordinated movement of the first securing element and the second securing element is achieved, so that the first securing element moves relative to the second securing element or vice versa when the coupling elements are brought into their coupling position.

[0016] Once the coupling elements are brought into their release position, the first securing element and the second securing element can be moved independently of each other, so that, for example, the first securing element can be moved into its upper position while the second securing element is held in its lower position.

[0017] It can further be provided that the number of coupling elements in the first position overlie the receptacle, so that the plug-in part presses the number of coupling elements into the release position when the plug-in part engages in the receptacle.

[0018] An overlay of the receptacle by the coupling elements, ie an arrangement of the coupling elements in such a way that they protrude into a cross-section of the receptacle or a distance between the coupling elements is smaller than the cross-section of the receptacle, causes the coupling elements to be automatically pressed into their release position by a plug-in part whose cross-section essentially corresponds to the cross-section of the receptacle when the plug-in part is pressed into the receptacle.

[0019] It can further be provided that the base body comprises a securing element receptacle for receiving the first securing element in some areas, wherein the first securing element in its lower position partially engages in the securing element receptacle in order to release the receptacle of the base body and in its upper position partially overlies the receptacle.

[0020] A securing element receptacle, such as a recess in the base body, enables movement of the first securing element into the securing element receptacle, so that the first securing element can be partially inserted into the securing element receptacle and the first securing element in its lower position releases the receptacle of the base body for inserting a plug-in part or for withdrawing the plug-in part.

[0021] It can further be provided that the second securing element is movable between its upper position, an intermediate position and its lower position, and the second securing element comprises a number of transmission elements which are configured to transmit a compressive force exerted on the second securing element to the first securing element when the second securing element moves from its upper position to its intermediate position in order to move the first securing element from its upper position, in which the first securing element partially overlaps the receptacle of the base body, to its lower position in which the first securing element releases the receptacle of the base body.

[0022] An intermediate position in which the second securing element is in a position raised relative to its lower position and lower relative to its upper position and in which the number of transmission elements of the second securing element engage the first securing element enables a coupled or simultaneous, i.e. synchronous, movement of the first securing element with the second securing element, so that pressure on the second securing element moves both the first securing element and the second securing element downwards, so that neither the first securing element nor the second securing element overlap the receptacle of the base body and an insert part arranged in the connecting element can be removed from the connecting element.It can further be provided that the second securing element in its lower position itself partially overlaps the receptacle of the base body and locking elements of the second securing element engage in locking element receptacles of the first securing element in order to secure the first securing element in its lower position, wherein the second securing element in its intermediate position is in a position which is elevated compared to the lower position of the second securing element, in which the number of transmission elements of the second securing element engage on the first securing element and the locking elements are released from the locking element receptacles.

[0023] In particular, the locking element receptacles can be formed by spring elements of the first securing element, so that the locking elements of the second securing element prevent a spring action which presses the first securing element from its lower position into its upper position when they engage in the locking element receptacles.

[0024] It can further be provided that the second securing element comprises a number of first user interfaces for manually moving the second securing element from its lower position to its upper position and a number of user interfaces for manually moving the second securing element from its upper position to its intermediate position.

[0025] A user interface can, for example, be a material projection, a predefined material area, or any other area of ​​the proposed connecting element suitable for engagement by a user. In particular, paired or oppositely arranged user interfaces can be provided so that the user can grasp and move, in particular pull, the second securing element with a pliers or tweezers grip.

[0026] It can further be provided that a number of recesses are formed in the second securing element, through which a number of display areas formed on the base body are visible when the second securing element is in its lower position, wherein a region of the second securing element surrounding a respective recess overlies a respective display area when the second securing element is in its upper position

[0027] Since the second locking element is only in its lower position when a plug-in part is secured in the base body, the second locking element conceals or overlays the number of display areas in its upper position, so that the number of display areas is not visually recognizable. Accordingly, the second locking element exposes the number of display areas, i.e., makes the number of display areas visually recognizable, when the second locking element is in its lower position.

[0028] When the second security element is in its upper position, respective display areas are overlaid, i.e. covered, by a material of the second security element surrounding the recesses, so that the display areas are covered and, in particular, machine-readable codes provided in the display areas are not machine-recognizable.

[0029] It may further be provided that a machine-readable code is displayed in each of the number of display areas.

[0030] A machine-readable code, such as a QR code, can, for example, encode or provide information about the connection system. The position of the machine-readable code in a respective display area ensures that the machine-readable code can only be read or recognized when the second securing element is in its lower position and a plug-in part is secured in the base body. Accordingly, if the machine-readable code is recognized by a machine, it can be assumed that the second securing element is in its lower position and a plug-in element is secured in the base body, so that a corresponding validation message can be output, i.e., displayed on an output unit or stored in a memory.

[0031] According to a second aspect, the invention presented relates to an insert part for fluid-conducting connection with a possible embodiment of the connecting element presented, wherein the insert part comprises a base body with a channel for conducting fluid and a plurality of pressure elements arranged on the base body, wherein the pressure elements are spaced from one another in such a way that the first securing element and the second securing element engage between two pressure elements of the plurality of pressure elements when the insert part is secured in the connecting element, and wherein the insert part is configured to move the first securing element of the connecting element into its lower position and, as a result, the second securing element into its lower position when moving on a predetermined trajectory through the base body.Pressure elements which encompass the first securing element and the second securing element, in particular in a form-fitting manner, minimize any play in the movement of the plug-in part in the connecting element.

[0032] Furthermore, pressure elements cause a movement of the first securing element and, consequently, a movement of the second securing element into their respective lower position when the plug-in part is inserted into the connecting element.

[0033] According to a third aspect, the present invention relates to a connection system for conducting fluid. The connection system comprises a number of possible configurations of the present connection element and a number of possible configurations of the present plug-in part.

[0034] According to a fourth aspect, the presented invention relates to a method for reversibly providing a fluid-conducting connection. The connection method comprises providing a possible embodiment of the presented connection system, inserting a respective plug-in part into a receptacle of a respective connecting element of the connection system, whereby the plug-in part in the connecting element initially presses the first securing element into its lower position and, due to a reversible mechanical coupling of the first securing element to the second securing element, presses the second securing element into its lower position, and the plug-in part releases the reversible mechanical coupling on its trajectory through the connecting element, so that the first securing element moves into its upper position due to a spring force provided by spring elements of the first securing element.while the second securing element remains in its lower position, the first securing element partially overlying the receptacle in its upper position and the second securing element partially overlying the receptacle in its lower position to secure the plug-in part in the connecting element.

[0035] It can be provided that the method further comprises moving the second securing element into its upper position and moving the second securing element from its upper position into its intermediate position in the direction of the base body, so that the first securing element is pressed into its lower position via a number of transmission elements of the second securing element, without the second securing element overlapping the receptacle of the base body. According to a fifth aspect, the presented invention relates to a cover element for selectively covering a display area on a base body of a possible embodiment of the presented connecting element.

[0036] The proposed cover element comprises a cover body, an interface for mechanical coupling with the second securing element of the connecting element and a number of recesses formed in the cover body, wherein the cover element is configured to move along with a movement of the second securing element, so that when the second securing element is in its lower position, display areas formed on the base body are machine-recognizable, and the cover body overlays a respective display area of ​​the base body when the second securing element is in its upper position.

[0037] Further features, details, and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. They show:

[0038] Fig. 1 shows a cross section through a possible design of the presented connection system in a release state,

[0039] Fig. 2 is a detailed view of a possible embodiment of a securing system of the connection system according to Fig. 1,

[0040] Fig. 3 shows a sequence of movement of a securing system of the connection system according to Fig. 1 when inserting a plug-in element,

[0041] Fig. 4 the connection system according to Fig. 1 with inserted plug-in element,

[0042] Fig. 5 shows a possible embodiment of the method presented, in which a connection provided by means of the connection system according to Figure 1 is released,

[0043] Fig. 6 shows a further possible embodiment of the security system provided according to the invention with a cover element,

[0044] Fig. 7 shows another possible embodiment of the proposed connection system with the securing system according to Fig. 6. Fig. 1 shows a connection system 100. The connection system 100 comprises a connecting element 101, which includes a base body 103 and a securing system 105, consisting of a first securing element 107 and a second securing element 109, as well as an insert part 111.

[0045] In a basic state, ie without an insert part 111 introduced into the connecting element 101, the first securing element 107 is in its upper position due to a spring force provided by spring elements of the first securing element 107 (not shown here) and is mechanically coupled to the second securing element 109 via coupling elements (also not shown here), so that the first securing element 107 also presses the second securing element 109 into its upper position.

[0046] If the plug-in part 111 is inserted or pressed into a receptacle 113 formed in the base body 103, the first securing element 107 is initially pressed into its lower position by ribs or pressure elements 115 of the plug-in part 111. Since the first securing element 107 is still coupled to the second securing element 109 via the coupling elements, a force provided by the plug-in part 111 to move the first securing element 107 is transferred to the second securing element 109 upon movement of the first securing element 107 into the lower position, and the second securing element 109 is moved toward its lower position. Accordingly, the plug-in part 111 can be pushed through the second securing element 109 into a predetermined securing position in the base body 103.

[0047] Due to the automatic and coupled movement of the first securing element 107 and the second securing element 109 when inserting the plug-in part 111 into the base body 103, manual actuation of the first securing element 107 and the second securing element 109 can be dispensed with.

[0048] Fig. 2 shows the first securing element 107, the second securing element 109 and the securing system 105 comprising the first securing element 107 and the second securing element 109.

[0049] The first securing element 107 comprises an optionally closed body 201 with arms 203, each of which has a coupling element 205 arranged thereon. The coupling elements 205 extend parallel to a central axis beyond the closed body 201 to engage arms 207 of the second securing element 109 and to secure the second securing element 109 to the first securing element 107 or to mechanically couple it thereto.

[0050] Accordingly, a movement of the arms 203 of the first securing element 107 or the coupling elements 205 away from each other leads to a free movement of the first securing element 107, so that the first securing element 107 can be moved independently of the second securing element 109, for example, lifted, i.e., moved into its upper position. For this purpose, the first securing element 107 comprises optional spring elements 215, which press the first securing element 107 away from the base body 103 when the first

[0051] Safety element 107 is in its lower position.

[0052] A securing region 217 of the first securing element 107 serves to overlay the receptacle 113 of the connecting element 101 when the first securing element 107 is in its upper position, so that a plug-in element 111 engaging in the receptacle 113 is secured in the connecting element 101.

[0053] Furthermore, the second securing element 109 comprises transmission elements 209, 213 which engage in transmission receptacles 211 of the first securing element 107 when the second securing element 109 is in its upper position or its intermediate position, so that pressure on the second securing element 109 leads to a movement of the first securing element 107.

[0054] In the present case, the transmission elements 209 comprise hooks 213 configured such that projections of the hooks 213 overlap or engage with the transmission receptacles 211. For this purpose, the transmission elements 209, 213 are subjected to pressure in the direction of the transmission receptacles 211 via an optional spring element.

[0055] Fig. 3 and Fig. 4 illustrate a connection process for connecting the male element 111 to the connecting element 101. In a first step 301, the male element 111 is pressed into the base body 103 of the connecting element 101, as indicated by arrow 311, so that the pressure element 115 presses against a guide 305 in the form of an inclined or slanted plane of the first securing element 107 and moves the first securing element 107 toward its lower position, as indicated by arrow 307.

[0056] Since the first securing element 107 is connected to the second securing element 109 in the

[0057] Recording state is mechanically coupled, the movement of the first

[0058] securing element 107 is transferred to the second securing element 109 in the direction of its lower position and the second securing element 109 moves in the direction of its lower position, as indicated by arrow 309.

[0059] In a second step 303, the plug-in element 111, which may be a valve of a fluid system, for example, is pressed further into the base body 103, as indicated by arrow 313. In the process, the pressure element 115 moves along the guide 305, or the guide 305 moves along the pressure element 115, so that the first securing element 107 is pressed further downwards towards its lower position, as indicated by an arrow 315 shifted relative to the arrow 307. As a result of the movement of the first securing element 107 into its lower position, the second securing element 109 is also moved further towards its lower position into an intermediate position, in which the plug-in element 111 can be inserted into the second securing element 109, as indicated by an arrow 317 shifted relative to the arrow 309.

[0060] In Fig. 4, the first securing element 107 is in its upper position and the second securing element 109 is in its lower position.

[0061] In its upper position, the first securing element 107, in particular with the securing area 217, overlaps the receptacle 113 and, as a result, secures the plug-in element 111 against slipping out of the connecting element 101. Accordingly, the securing area 217 is flat on a side facing the second securing element 109, so that sliding of the plug-in element 111 onto the securing area 217 and movement of the plug-in element out of the receptacle 113 is prevented.

[0062] In its lower position, the second securing element 109, in particular with its transmission elements 209, also overlaps the receptacle 113 and, as a result, secures the plug-in element 111 against slipping out of the connecting element 101.

[0063] Fig. 5 shows a method 500 for reversibly providing a fluid-conducting connection.

[0064] In a first state or securing state 501, the first securing element 107 is in its upper position and the second securing element 109 is in its lower position. Accordingly, the first securing element 107 and the second securing element 109 each overlap the receptacle 113, so that a plug-in element inserted into the receptacle 113 (not shown here for reasons of clarity) is secured by the first securing element 107 and the second securing element 109 in a base body of a corresponding connecting element. When the first securing element 107 is in its upper position and the second securing element 109 is in its lower position, locking elements 503 of the second securing element 109 engage in locking element receptacles 505 of the first securing element 107, which prevent the second securing element 109 from unintentionally moving into its upper position.

[0065] To release the plug-in element, the second securing element 109 is pulled upwards from its lower position to its upper position at its first user interfaces 507, as indicated by arrows 509, 511, whereby the locking elements 503 of the second securing element 109 are released from the locking element receptacles 505 of the first securing element 107.

[0066] In a second state or transitional state 513, the second securing element 109 is in its upper position, in which the locking elements 503 of the second securing element 109 are released from the locking element receptacles 505 of the first securing element 107 and transmission elements 207 of the second securing element 109 engage in transmission receptacles 209 of the first securing element 107. Accordingly, pressure on a second user interface 515 of the second securing element 109, as indicated by arrow 517, causes the second securing element 109 to move into its intermediate position and, as a result, the first securing element 107 to move into its lower position.

[0067] In a third state or release state 521, the first securing element 107 is in its lower position and the second securing element 109 is in its intermediate position, so that the receptacle 113 is neither overlaid by the first securing element 107 nor by the second securing element 109 and the plug-in element can be removed from the base body 103.

[0068] In Fig. 6, the securing system 105 is shown together with a cover element 117, which comprises two recesses 119, which move together with the second securing element 109 relative to the first securing element 107 or a base body 103 of the connection system 100.

[0069] In Fig. 7, the connection system 100 is shown in a configuration in which a machine-readable code is displayed in display areas 121 on the base body 103. The display areas 121 are overlaid by a cover body 123 of the cover element 117, so that the machine-readable code cannot be read when the second securing element 109, together with the cover element 117, is in its upper position and no plug-in element 111 is inserted into the base body 103.

[0070] When an insertion element 111 is inserted into the base body 103, the insertion element 111 presses the second securing element 109 together with the cover element 117 into its lower position, so that the display areas 121 are superimposed by the recesses 119 and the machine-readable code is or becomes machine-recognizable.

[0071] Accordingly, the display areas 121 on the base body 103 and the recesses 119 are aligned relative to one another in such a way that the machine-readable code is only machine-readable when the second securing element 109, together with the cover element 117, is in its lower position and the plug-in element 111 is secured in the base body 103. Thus, upon recognition of the machine code by, for example, an optical scanner, a secure connection between the plug-in element 111 and the base body 103 can be automatically validated and, for example, a validation message can be generated.

[0072] The invention is not limited to one of the embodiments described above, but can be modified in many ways.

[0073] All features and advantages arising from the claims, the description and the drawings, including design details, spatial arrangements and method steps, can be essential to the invention both individually and in a wide variety of combinations.

[0074] Reference symbol list

[0075] 100 connection system

[0076] 101 connecting element

[0077] 103 basic bodies

[0078] 105 Security system

[0079] 107 first securing element

[0080] 109 second securing element

[0081] 111 Insert element

[0082] 113 Recording

[0083] 115 Pressure element

[0084] 117 Cover element

[0085] 119 Recess

[0086] 121 Display area

[0087] 123 cover body

[0088] 201 bodies

[0089] 203 Arm

[0090] 205 Movement element

[0091] 207 Arm

[0092] 209 Transmission element

[0093] 211 Transmission recording

[0094] 215 spring element

[0095] 301 first step

[0096] 303 second step

[0097] 305 Leadership

[0098] 307 Arrow

[0099] 309 Arrow

[0100] 311 Arrow

[0101] 313 Arrow

[0102] 315 Arrow

[0103] 317 Arrow

[0104] 500 procedures

[0105] 501 first state

[0106] 503 locking element

[0107] 505 locking element holder

[0108] 507 first user interface

[0109] 509 Intermediate position

[0110] 511 Arrow second state second user interface Arrow Arrow third state

Claims

Patent claims 1. A connecting element (101) for fluid-conducting connection to a plug-in part (111), wherein the connecting element (101) comprises: a base body (103), a securing system (105), wherein the base body (103) comprises a fluid channel and a receptacle (113) for receiving the plug-in part (111), wherein the securing system (105) is arranged on the base body (103) and is configured to secure the plug-in part (111) in a predetermined position relative to the fluid channel in the receptacle (113) in order to provide a fluid-conducting connection between the connecting element (101) and the plug-in part (111), wherein the securing system (105) comprises a first securing element (107) and a second securing element (109), wherein the first securing element (107) is movable between a lower position and an upper position, wherein the second securing element (109) is movable between an upper position and a lower Position is movable,wherein the second securing element (109) is to be reversibly mechanically coupled to the first securing element (107) via a number of coupling elements (205), wherein the number of coupling elements (205) are movable between a coupling position and a release position, wherein the number of coupling elements (205) in their coupling position transmit a movement of the first securing element (107) to the second securing element (109), so that the first securing element (107) moves the second securing element (109) towards its lower position when a pressure element (115) of the plug-in part (111) moves the first securing element (107) into its lower position during a movement of the plug-in part (111) along a predetermined trajectory through the base body (103), and the number of coupling elements (205) release a movement of the first securing element (107) into its upper position,when the pressure element (115) moves further along the predetermined trajectory through the base body (103) into the second securing element (109).

2. Connecting element (101) according to claim 1, characterized in that that the first securing element (107) comprises a number of spring elements (215) configured to urge the first securing element (107) from its lower position to its upper position. The connecting element (101) according to claim 1 or 2, characterized in that the second securing element (109) is movable between its upper position, its lower position, and an intermediate position when the male part (111) moves through the base body (103), wherein the second securing element (109) is in its intermediate position between its upper position and its lower position and permits movement of the male part (111) through the base body (103). The connecting element (101) according to any one of the preceding claims, characterized in that the first securing element (107) comprises adjacent arms (203) surrounding the receptacle (113) of the base body (103).wherein a number of coupling elements (205) are arranged on each of the arms (203), wherein the number of coupling elements (205) are movable between a release position and a coupling position, and the coupling elements (205) are aligned towards one another in their coupling position and are aligned further away from one another in the release position than in the coupling position, wherein the second securing element (109) comprises a number of arms (207), each of which comprises a receptacle for engaging a coupling element (205) of the number of coupling elements (205) of the first securing element (107), so that the number of coupling elements (205) block a movement of the second securing element (109) relative to the first securing element (107) when the number of coupling elements (205) are in their coupling position and release a movement of the second securing element (109) relative to the first securing element (107),when the plurality of coupling elements (205) are in their release position. Connecting element (101) according to claim 4, characterized in that the plurality of coupling elements (205) in their coupling position overlap the receptacle (113), so that the plug-in part (111) presses the plurality of coupling elements (205) into their release position when the plug-in part (111) engages the receptacle (113). Connecting element (101) according to one of the preceding claims, characterized in that the base body (103) comprises a securing element receptacle for partially receiving the first securing element (107), wherein the first securing element (107) in its lower position partially engages in the securing element receptacle in order to release the receptacle (113) of the base body (103) and in its upper position partially overlies the receptacle (113).Connecting element (101) according to one of the preceding claims, characterized in that the second securing element (109) is movable between its upper position, an intermediate position and its lower position, and the second securing element (109) comprises a number of transmission elements (207) which are configured to transmit a compressive force exerted on the second securing element (109) to the first securing element (107) when the second securing element (109) moves from its upper position to its intermediate position in order to move the first securing element (107) from its upper position, in which the first securing element partially overlaps the receptacle (113) of the base body (103), to its lower position, in which the first securing element (107) releases the receptacle (113) of the base body (103).Connecting element (101) according to claim 7, characterized in that the second securing element (109) in its lower position itself partially overlaps the receptacle (113) of the base body (103) and locking elements (503) of the second securing element (109) engage in locking element receptacles (505) of the first securing element (107) in order to secure the first securing element (107) in its lower position, wherein the second securing element (109) in its intermediate position is in a position which is elevated relative to the lower position of the second securing element (109), in which position the number of transmission elements (209) of the second securing element (109) engage on the first securing element (107) and the locking elements (503) are released from the locking element receptacles (505).Connecting element (101) according to one of claims 7 to 8, characterized in that the second securing element (109) has a number of first user interfaces (507) for manually moving the second securing element (109) from its. lower position to upper position and a number of user interfaces (507) for manually moving the second securing element (109) from its upper position to its intermediate position. Connecting element (101) according to one of the preceding claims, characterized in that a number of recesses (119) are formed in the second securing element (109), through which a number of display areas (121) formed on the base body (103) are visible when the second securing element (109) is in its lower position, and wherein a region of the second securing element (109) surrounding a respective recess (119) overlies a respective display area (121) when the second securing element (109) is in its upper position.An insert part (111) for fluid-conducting connection to a connecting element (101) according to any one of claims 1 to 10, wherein the insert part (111) comprises a base body (103) with a channel for conducting fluid and a plurality of pressure elements (115) arranged on the base body, wherein respective pressure elements (115) are spaced apart from one another such that the first securing element (107) and the second securing element (109) engage between two pressure elements (115) of the plurality of pressure elements (115) when the insert part (111) is secured in the connecting element (101), and wherein the insert part (111) is configured, upon movement on a predetermined trajectory through the base body (103), to move the first securing element (107) of the connecting element (101) into its lower position and, as a result, to move the second securing element (109) into its lower position.A connection system (100) for conducting fluid, the connection system (100) comprising a number of connection elements (101) according to any one of claims 1 to 10 and a number of plug-in parts (111) according to claim 10. A method (500) for reversibly providing a fluid-conducting connection, the connection method (500) comprising:. Providing the connection system (100) according to claim 13, introducing a respective plug-in part (111) into a receptacle (113) of a respective connecting element (101) of the connection system (100), whereby the plug-in part (111) in the connecting element (101) first presses the first securing element (107) into its lower position and by a reversible mechanical coupling of the first securing element (107) with the second securing element (109), presses the second securing element (109) into its lower position, and the plug-in part (111) releases the reversible mechanical coupling on its trajectory through the connecting element (101), so that the first securing element (107) moves into its upper position due to a spring force provided by spring elements (215) of the first securing element (109), while the second securing element (109) remains in its lower position, wherein the first securing element (107) partially overlies the receptacle (113) in its upper position and the second securing element (109) partially overlies the receptacle (113) in its lower position in order to secure the plug-in part (111) in the connecting element (101). Method (500) according to claim 13, characterized in that the method (500) further comprises: Moving the second securing element (109) into its upper position, and moving the second securing element (109) from its upper position into its intermediate position in the direction of the base body (103), so that the first securing element (107) is pressed into its lower position via a number of transmission elements of the second securing element (109) without the second securing element (109) overlapping the receptacle (113) of the base body (103).Cover element (117) for selectively covering a display area (119) on a base body (103) of a connecting element (101) according to one of claims 1 to 10, wherein the cover element (117) comprises: a cover body (123), an interface for mechanical coupling to the second securing element (109) of the connecting element (101), a number of recesses (119) formed in the cover body (123), wherein the cover element (117) is configured to move along with a movement of the second securing element (109) so that when the second securing element (109) is in its lower position, display areas formed on the base body (103) are machine-recognizable, and. the cover body (123) overlies a respective display area of ​​the base body (103) when the second securing element (109) is in its upper position.

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