Coupling member for closing a fluid delivery system, mating coupling member for such coupling member, and coupling system

Abstract

The invention relates to a coupling member (100) for closing a fluid delivery system, comprising: a coupling member housing (10), comprising a fluid connection (12) and a coupling side (13), wherein the coupling member housing (10) comprises a longitudinal axis (L1) extending from the fluid connection (12) towards the coupling side (13); a spike (30), comprising at least one fluid opening (31) and held in a spike receptacle (11) of the housing (10), the spike receptacle (11) being arranged at the fluid connection (12) and extending into the coupling member housing (10) in the direction of the longitudinal axis (L1), wherein at least one fluid opening is arranged in an end of the spike (30) facing the coupling side (13); a sealing member receptacle (20) arranged on the coupling side A connecting member housing (10); and a sealing member (21) which is arranged in the sealing member receptacle (20), wherein the connecting member housing (10) includes a housing portion (10a) which at least partially surrounds the sealing member receptacle (20) in an axial direction relative to the longitudinal axis (L1) and includes a connecting member housing threaded portion (10b) on an inner surface facing the sealing member (20); and wherein the sealing member receptacle (20) together with the sealing member (21) is movable in the direction of the longitudinal axis (L1) within the range of the connecting member housing threaded portion (10b) between a position at a maximum distance from the fluid connector (12) and a position at a minimum distance from the fluid connector (12) by being guided by a sealing member receptacle guide structure (20a).

Description

Technical Field

[0001] The invention relates to a coupling member for closing a fluid delivery system, a mating coupling member for such a coupling member and a coupling system. Background Art

[0002] Many substances which are administered as injections or in a comparable delivery form, such as CMR drugs, which are used, for example, in cancer therapy and whose therapeutic application is primarily intended to damage densely growing tumor cells, have considerable potential dangers outside of the actual therapeutic application. Due to their mechanism of action, some of these substances are themselves carcinogenic, which is why contact with people not receiving treatment must be avoided. Therefore, closed drug delivery systems, so-called "closed system delivery devices" or CSTDs, are increasingly being used for the manufacture of ready-to-use formulations of CMR drugs. An important component of such CSTDs are coupling systems which enable safe delivery of CMR drugs or other substances and which are dry-sealed after disconnection, thereby protecting the environment from contamination, for example through leaks or droplet formation on the surfaces of the coupling components.

[0003] This type of coupling system is often associated with the terms "dry connection", "automatic self-sealing technology" or "closed connection" and is essential to achieve a closed fluid transfer system.

[0004] Known coupling systems are usually complex in their operation and connection structure, and may provide poor flow rates. In addition, if the constant surface pressure of the sealing surfaces is not maintained, fluid residues may appear on the sealing surfaces and the coupling surfaces, respectively.

[0005] All existing systems have in common that they are relatively large, which leads to disadvantages during application near a patient, and that at least the coupling member or the mating coupling member, due to their structure, provide poor accessibility to the coupling surface and the mating coupling surface, respectively, which hinders sterilization. Summary of the invention

[0006] In view of the disadvantages associated with the prior art, the object of the present invention is to provide a coupling member, a mating coupling member and a coupling system for a closed fluid delivery system, wherein the corresponding coupling surfaces are dry-locked in the disconnected state and can be safely operated in a simple manner.

[0007] The object according to the invention is solved by a coupling member for a closed fluid conveying system according to claim 1 and a coupling system according to claim 13. Further advantageous configurations of the invention are evident from the dependent claims.

[0008] According to the present invention, a coupling member for a closed fluid delivery system comprises: a coupling member housing, the coupling member housing comprising a fluid connector and a connector side, wherein the coupling member housing comprises a longitudinal axis extending from the fluid connector toward the connector side; a spike, the spike comprising at least one fluid opening and being retained in a spike receptacle of the housing, the spike receptacle being arranged at the fluid connector and extending into the coupling member housing in the direction of the longitudinal axis, wherein at least one fluid opening is arranged in an end of the spike facing the connector side; a sealing member receptacle, arranged in the coupling member housing on the connector side; and a sealing member, arranged in the sealing member receptacle, wherein the coupling member housing comprises a housing portion, the housing portion at least partially surrounding the sealing member receptacle in an axial direction relative to the longitudinal axis, and the coupling member housing comprises a coupling member housing threaded portion on an inner surface facing the sealing member, and wherein the coupling member housing together with the sealing member is guided by a sealing member receptacle guide structure and is movable in the direction of the longitudinal axis between a position at a maximum distance from the fluid connector and a position at a minimum distance from the fluid connector via the coupling member housing threaded portion.

[0009] Due to the interaction of the sealing member receptacle guiding structure with the threaded portion of the coupling member housing, the sealing member receptacle can be secured against accidental movement by pure compression or tension forces. The position with the greatest distance from the fluid connection corresponds to the position of the sealing member receptacle in the disconnected state, while when the connected state intended for fluid communication with the mating coupling member is reached, the position with the smallest distance from the fluid connection is preferably the one.

[0010] The term "thread" with respect to the coupling member housing threaded portion or hereinafter is not limited to equidistant threads or threads with inclined thread flanks, but generally includes structural designs in which a guide structure is helically formed.

[0011] In particular, the at least one fluid opening is arranged in the sealing member when the sealing member receptacle with the sealing member is located at a position which is at a maximum distance from the fluid connection.

[0012] Therefore, in terms of the above-mentioned reduction in the risk of accidental movement, leakage of the fluid can be prevented in the disconnected state.

[0013] In one embodiment, the coupling member housing threaded portion is formed as an internal thread, and the sealing member receptacle guide structure includes at least one protrusion engageable in the internal thread, the at least one protrusion protruding radially outwardly relative to the longitudinal axis.

[0014] Therefore, the sealing member seat guide structure can be formed in a simple manner.In principle, it is also possible to form the coupling member housing threaded portion as an external thread, wherein the sealing member seat guide structure is at least partially formed as an internal thread corresponding thereto.

[0015] In particular, the coupling member housing threaded portion comprises at least two threads separated from each other, in particular at least two threads opposite to each other.

[0016] In combination with at least two sealing member receptacle guide structures, each of which is opposite to one another, the sealing member receptacle can be guided into a more stable position in the threaded portion of the coupling member housing, since tilting of the sealing member receptacle is thereby prevented. However, the number of threads may also be smaller than the number of sealing member receptacle guide structures, for example to insert the sealing member receptacle into the coupling member housing in different orientations and / or to provide different movements of the sealing member receptacle by means of different threads.

[0017] In one embodiment, at least one thread of the threaded portion of the coupling member housing extends over an angle of less than 360°, in particular over an angle of approximately 180°, relative to the longitudinal axis.

[0018] Thus, the guided movement of the sealing member receptacle can be performed over a limited rotation angle, which makes the operation easier. In addition, the shortened rotation angle (i.e., the rotation angle for reaching the target position, which does not include multiple rotations) helps to control the movement, because multiple rotations do not have to be tracked. In this case, optical or tactile marking elements can support motion control.

[0019] In a further development, at least one thread of the threaded portion of the coupling member housing comprises, at its end facing the fluid connection, an orthogonal portion relative to the longitudinal axis.

[0020] Thus, the inclination of the thread does not continue through this portion. When the sealing member receptacle guide structure is moved into the orthogonal portion, the sealing member receptacle cannot be moved out of this position by a pure tensile or compressive force applied in the direction of the longitudinal axis. Thus, if the orthogonal portion corresponds to this position, the orthogonal portion allows the positioning of the sealing member receptacle to be fixed in this position, in particular in a position at a minimum distance from the fluid connection.

[0021] In particular, at least one thread of the threaded portion of the coupling member housing comprises, at its end facing the fluid connection, a recessed portion towards the longitudinal axis, which is recessed relative to the thread in the direction of the coupling side.

[0022] When the sealing member receptacle guiding structure moves into the recessed portion, the sealing member receptacle cannot be moved out of the position by a pure rotational motion applied around the longitudinal axis, but must be initially moved out of the recessed portion along the longitudinal axis toward the fluid connector by applying a compressive force on the sealing member receptacle. The position of the sealing member receptacle guiding structure in the recessed portion preferably corresponds to the position of the sealing member receptacle in the connected state. The recessed portion can be provided as an alternative or supplement to the orthogonal portion. In the combination of the recessed portion and the orthogonal portion, the recessed portion is preferably adjacent to the orthogonal portion in the guiding direction of the sealing member receptacle guiding structure at the end of the thread facing the fluid connector. For example, the sealing member receptacle guiding structure first moves toward the fluid connector along at least one thread providing an inclination, then reaches the orthogonal portion, and can subsequently be moved into the recessed portion by continuous rotational movement.

[0023] In one embodiment, the housing portion is rotatable relative to the longitudinal axis.

[0024] Thus, the sealing member receptacle can be moved along the longitudinal axis by rotational movement of the housing part about the longitudinal axis via the sealing member receptacle guide structure. Preferably, the housing part is a part that is rotatably supported relative to the rest of the housing, so that the rotational movement performed by the housing part is not transmitted to the rest of the housing. This facilitates handling or connecting and disconnecting, especially in situations where, for example, further components are already connected to the fluid connection.

[0025] Alternatively or additionally, the sealing member receptacle is rotatable relative to the longitudinal axis and / or the coupling member housing.

[0026] Hence, it is not or not only the housing part that is rotated, but the sealing member receptacle that is rotated for moving the sealing member receptacle via the sealing member receptacle guide structure engaging with at least the corresponding thread.

[0027] According to a further development, the sealing member receptacle together with the sealing member forms at least a part of the coupling-side front surface of the coupling member.

[0028] Therefore, the sealing member receptacle and the sealing member do not retract, so that they provide good accessibility, thereby facilitating sterilization. In particular, the coupling side front surface can be designed to be substantially flat. The term "substantially flat" means that small profile deviations can be formed, such as the center of the sealing member can be formed to be high, but these profile deviations have no effect on the coupling side front surface of the coupling member in terms of accessibility.

[0029] In particular, the sealing member receptacle comprises at its end facing the coupling side a coupling member-side fastening structure for cooperating with the coupling member, in particular at least two snap hooks protruding towards the coupling side in the direction of the longitudinal axis.

[0030] By means of the fastening structure on the coupling member side at the sealing member receptacle, it can be ensured that during the movement of the sealing member receptacle along the longitudinal axis from the maximum distance from the fluid connector to the position with the minimum distance from the fluid connector, the mating coupling member fastened thereto remains in a predetermined positional relationship. In particular, this predetermined positional relationship provides a constant surface pressure between the sealing member and the mating coupling member sealing member, so that fluid tightness can be ensured. In other words, a constant surface pressure of the elastomer surface is achieved over the entire connection path. Preferably, the fastening structure is designed so that the fastening of the mating coupling member to the fastening structure is performed only by applying a compressive force in the direction of the coupling member and / or the mating coupling member, and no rotational movement is performed during the fastening process so that the sealing member receptacle is not moved along the thread. If the fastening process includes a rotational movement, this should be at least opposite to the rotational movement used to move the sealing member receptacle along the thread.

[0031] For example, using snap hooks as fastening structures enables fastening by compression forces in a simple manner. In addition, the snap hooks hardly interfere with the accessibility to the front surface of the coupling side, so that sterilization can still be easily performed. In addition, tilting of the mating coupling member can be prevented by at least two snap hooks, which are preferably arranged opposite to each other.

[0032] According to a further development, the sealing member receptacle is supported in the coupling member housing by an elastic member, in particular a compression spring member, which acts in the direction of the longitudinal axis and is arranged between the fluid connection and the sealing member receptacle.

[0033] The elastic member can be formed by a separate spring member or by a sealing member or a sealing member receptacle. If the elastic member is formed by a sealing member or a sealing member receptacle, the member is integrated into or formed by the corresponding component, for example, by corresponding material selection and / or structural design. In this case, the sealing member or the sealing member receptacle is supported against the coupling member housing in the longitudinal direction in the same manner as the separate spring member. The sealing member receptacle is maintained at a position at the maximum distance from the fluid connector by the elastic member without applying external force. Therefore, the movement of the sealing member receptacle toward the fluid connector needs to overcome the retaining force, so that the risk of accidental movement is reduced. In addition, the elastic member supports the return movement from the connected state to the disconnected state.

[0034] On the other hand, the present invention also relates to a connection system for a closed fluid delivery system. The connection system includes at least one connection member as described above and at least one mating connection member for connecting with the connection member. The mating connection member includes a mating connection member housing and a mating connection member sealing member, the mating connection member housing includes a mating connection member fluid connector and a mating connector side, wherein the mating connection member housing includes a mating connection member longitudinal axis extending from the mating connection member fluid connector toward the mating connector side, and the mating connection member sealing member is arranged in the mating connection member housing and forms at least a part of the front surface of the mating connector side of the mating connection member together with the mating connection member housing. The connection system is configured so that the fluid opening of the connection member is at least partially arranged on the side of the mating connection member sealing member of the mating connection member facing the mating connection member fluid connector when it is connected to the mating connection member (in this state, the sealing member receptacle is located at a position with the minimum distance from the fluid connector of the connection member).

[0035] Due to the movement of the sealing member receptacle from the position at the greatest distance from the fluid connector to the position at the smallest distance from the fluid connector and the corresponding movement of the mating coupling member, wherein the mating connector side front surface of the mating coupling member sealing member and the connector side front surface of the sealing member of the coupling member are in fluid-tight contact with each other, the sealing member of the coupling member and the mating coupling member sealing member move along the spike 30 in the longitudinal direction toward the fluid connector. For the fluid communication of the coupling member with the mating coupling member through the spike, the coupling system is configured such that the sealing member and the mating sealing member move toward the fluid connector of the coupling member to such an extent that the fluid opening of the spike of the coupling system in the connected state at the side of the mating connector sealing member facing away from the mating connector member side front surface at least partially, in particular completely, protrudes into the mating connector member fluid channel included or formed by the mating connector member housing, in the connected state, the sealing member receptacle is located at the position at the smallest distance from the fluid connector of the coupling member. Therefore, the fluid opening is continuously sealed by the sealing member and the mating connector sealing member until shortly before the connected state is reached. When the coupling member and the mating coupling member are disconnected, any fluid still on the spike may be wiped off at the mating coupling member sealing member, so that the risk of fluid leakage during or after disconnection is reduced.

[0036] In one embodiment, the mating connecting member housing includes a fastening portion, which extends from the mating connector side toward the mating connecting member fluid connector in the direction of the longitudinal axis of the mating connecting member, and includes a mating connecting member side fastening structure, in particular a recess, for connecting to the connecting member side fastening structure, in particular for accommodating a snap hook.

[0037] Therefore, when viewed from the mating connector side, the mating connector member side fastening structure is retracted relative to the mating connector side front surface, with the result that when the mating connector member is fastened to the connector member, the mating connector side front surface of the mating connector member sealing member can be maintained with a predetermined surface pressure. At the same time, the accessibility of the mating connector side front surface (for example, for disinfection purposes) is not thereby restricted.

[0038] The mating coupling side fastening structure may be radially continuous with respect to the longitudinal axis of the mating coupling member so that the mating coupling member can be fastened to the coupling member in any relative radial position. Alternatively, the mating coupling member side fastening structure may be only partially formed to allow corresponding fastening only in one or more predetermined relative positions. For example, the mating coupling member side fastening structure may have a recess, the position and size of which uniquely corresponds to the snap hook of the coupling member, only in one relative position intended for fastening.

[0039] In one embodiment, the mating coupling member housing comprises an unlocking mechanism on an outer wall extending in the direction of the mating coupling member longitudinal axis, by which the connection of the mating coupling member-side fastening structure with the coupling member-side fastening structure is releasable.

[0040] Such an unlocking mechanism can be formed, for example, via an elastic or resiliently supported mating coupling member housing portion, which comprises or cooperates with a portion of the mating coupling member side fastening structure so as to be movable so that the coupling member side fastening structure can be moved out of the mating coupling member side fastening structure. In this respect, it is advantageous if the coupling member housing is configured such that such unlocking is prevented in a state in which the sealing member receptacle is in a position at a minimum distance from the fluid connection.

[0041] Furthermore, other advantages of the coupling system are similar to those mentioned with respect to the coupling member and / or the mating coupling member. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Features, conveniences, and advantages of the present invention are also described below by way of exemplary embodiments with reference to the accompanying drawings.

[0043] The attached figure shows:

[0044] Figure 1 is a schematic cross-sectional view of a coupling member according to an exemplary first embodiment of a coupling member in a disconnected state in a plane parallel to a longitudinal axis of a coupling member housing;

[0045] Figure 2 is a cross section of an exemplary end portion of a fluid connector side thread with an orthogonal portion in a top view in a viewing direction on a longitudinal axis;

[0046] Figure 3 is a cross section of another exemplary end of a thread on the fluid connector side having a concave portion in a top view in a viewing direction on the longitudinal axis;

[0047] Figure 4 is a schematic cross-sectional view of a mating coupling member according to an exemplary first embodiment of a mating coupling member in a disconnected state in a plane parallel to a mating coupling member longitudinal axis of a mating coupling member housing;

[0048] Figure 5 Is in a disconnected state with Figure 1 The connection components and Figure 4 A schematic cross-sectional view of a coupling system of a mating coupling member in a plane parallel to the longitudinal axis, wherein the mating coupling member is retained by the coupling member;

[0049] Figure 6 Is in connected state Figure 5 A schematic cross-sectional view of a coupling system of in a plane parallel to the longitudinal axis;

[0050] Figure 7 All disconnected states are based on Figure 4 and 5 An overview of the external view of the connection system, a cross-sectional view along the intersection line AA and the intersection line BB, and a perspective view;

[0051] Figure 8 All disconnected states are based on Figure 7 or Figure 4 and 5 An overview of an external view of a coupling system of , a cross-sectional view along the intersection line AA and the intersection line BB, and a perspective view, wherein the mating coupling member is held by the coupling member;

[0052] Fig. 9 Is the basis for all connections Figure 7 and 8 or Figure 4 and 5 Overview of the external view of the connection system, the cross-sectional view along the intersection line AA and the intersection line BB, and the perspective view. DETAILED DESCRIPTION

[0053] Figure 1 1 shows a cross-sectional view of the coupling member 100 in the exemplary first embodiment in a plane parallel to the longitudinal axis L1 of the coupling member housing 10 of the coupling member 100. The intersection line corresponds to Figure 61 and 10. The longitudinal axis L1 of the coupling member 100 extends from the fluid connector 12 toward the coupler side 13. In addition to the coupling member housing 10, the coupling member 100 also includes a spike receptacle 11, a spike 30 accommodated in the spike receptacle 11 and formed as a fluid channel, a sealing member receptacle 20 having a sealing member receptacle guide structure 20A, a sealing member 21 accommodated in the sealing member receptacle 20, and an elastic member 40 disposed between the fluid connector side end of the coupling member housing 10 and the sealing member receptacle 20.

[0054] The coupling member housing 10 includes a housing portion 10a extending from the fluid connector side portion of the coupling member housing 10 toward the connector side 13 around the longitudinal axis L1. In the illustrated embodiment, the housing portion 10a is preferably rotatably supported around the longitudinal axis L1. The housing portion 10a also includes a coupling member housing threaded portion 10b having two threads 10c, however, more or less threads 10c may be provided. Here, the threads 10c are each formed as a spiral groove extending 180° from the connector side 13 toward the fluid connector 12. One connector side end of one thread 10c is opposite to the connector side end of another thread 10c relative to the longitudinal axis L1. Therefore, the corresponding fluid connector side ends of the threads 10c are also opposite to each other relative to the longitudinal axis L1.

[0055] In the disconnected state shown, the sealing member receptacle 20 is in a position at the maximum distance from the fluid connector 12 and is retained in the coupling member housing 10 via two sealing member receptacle guide structures 20a, each of which engages one of the threads 10c. The sealing member receptacle guide structure 20a to be provided is mainly used to guide the movement of the sealing member receptacle 20 along the longitudinal axis L1 from the position at the maximum distance from the fluid connector 12 to the position at the minimum distance from the fluid connector 12, and vice versa. Therefore, the sealing member 20 can also be retained in the coupling member housing 10 by other structural configurations, and the corresponding sealing member receptacle guide structure 20a does not fully engage the corresponding thread 10c until the sealing member receptacle 20 moves toward the fluid connector 12 along the longitudinal axis L1.

[0056] In addition, the sealing member receptacle 20 includes two exemplary fastening structures 22 on the coupling member side at its end facing the coupling side 13, wherein snap hooks 22a are formed at the coupling side end. Via the fastening structures 22 with snap hooks 22a, the mating coupling member 200 (e.g., as described later) described later can be fastened to the coupling member 200. Figure 4 As shown) can maintain a predetermined positional relationship with the connecting member 100. Figure 1The fastening structure allows good access to the coupling-side front surface formed by the sealing member receptacle 20 and the sealing member 21, so that the sealing member 21 can be sterilized without great restrictions.

[0057] The arrangement and dimensions of the sealing member 21 in the sealing member receptacle 20 are designed such that in the disconnected state the sealing member 21 completely surrounds, ie seals, a fluid opening 31 arranged in the end of the tip 30 facing the coupling side 13 .

[0058] The movement of the sealing member receptacle 20 from the position at the greatest distance from the fluid connector 12 toward the position at the smallest distance from the fluid connector 12 (or vice versa) is performed by guiding the corresponding sealing member receptacle guide structure 20a in the corresponding thread 10c toward the fluid connector 12 or in the opposite direction thereof (depending on the direction of movement to be provided). For this purpose, the housing part 10a and / or the sealing member receptacle 20 can be selectively arranged to rotate and move. This corresponds to intentional screwing in or out. However, alternatively or additionally, if the housing part 10a and / or the sealing member receptacle 20 is rotatably supported in a manner that allows the housing part 10a and / or the sealing member receptacle 20 to be autonomously screwed in or out thereby, it may be sufficient to apply a compressive force or a tensile force according to the direction of movement to be envisaged.

[0059] As long as autonomous screwing in or out is possible in principle, or also for other fixing considerations, it may be advantageous to fix the position of the corresponding sealing member receptacle guide structure 20a in the corresponding thread 10c in a position corresponding to the position with the smallest distance from the fluid connection 12 to prevent accidental position changes. Figure 2 and 3 A possible exemplary embodiment for such a position fixation is shown in Figure 2 and 3 Each of the diagrams shows a cross section of one end of the fluid connector side thread 10c in a top view viewed in the direction on the longitudinal axis L1. In each case, the solid arrows indicate the longitudinal axis direction toward the coupling side 13, while the non-solid arrows indicate the longitudinal axis direction toward the fluid connector 12.

[0060] Figure 2 An exemplary end of a fluid connector side thread 10c is shown having an orthogonal portion 10d relative to the longitudinal axis L1. When the sealing member receptacle guide structure 20a moves into the orthogonal portion 10d, the applied compressive or tensile force does not cause rotational movement of the housing portion 10a and / or the sealing member receptacle 20. Thus, the risk of accidental movement is reduced.

[0061] Alternatively, Figure 3An exemplary end of a fluid connector side thread 10c is shown, which has a recessed portion 10e in the direction of the solid arrow. When the sealing member seat guide structure 20a moves into the recessed portion 10e, the position of the sealing member seat 20 is fixed, thereby preventing rotational movement. This position of the sealing member seat guide structure 20a corresponds to the position of the sealing member seat 20 in the connected state, wherein the sealing member seat 20 is in a position with the minimum distance from the fluid connector 12 of the coupling member 100. Strictly speaking, the position of the sealing member seat 20 with the minimum distance from the fluid connector 12 is formed by the position of the transition between the thread 10c, which still includes the inclined portion and the recessed portion 10e. However, since the reverse offset is insignificant on the application scale, the position of the sealing member seat 20 when the sealing member guide structure 20a engages the recessed portion 10e is also understood as the position with the minimum distance from the fluid connector 12.

[0062] In order to release the position fixed via the recessed portion 10e, the sealing member receptacle guide structure 20a must first be relatively moved again in the direction of the fluid connection 12 so as to be able to overcome the recessed portion 10e. This form of position fixing is further supported by providing an elastic member 40. However, according to Figure 3 The fixed position does not exclude the Figure 2 The position of is fixed, so the combined position fixation can also be applied.

[0063] Figure 4 A schematic cross-sectional view of a mating coupling member 200 according to an exemplary first embodiment of a mating coupling member 200 in a disconnected state in a plane parallel to a mating coupling member longitudinal axis L2 of a mating coupling member housing 50 is shown. The mating coupling member 200 includes a mating coupling member housing 50 having a mating coupling member fluid connector 51 and a mating connector side 52, wherein the mating coupling member housing 50 includes a mating coupling member longitudinal axis L2 extending from the mating coupling member fluid connector 51 toward the mating connector side 52. In addition, the mating coupling member includes a sealing member 60, which is arranged at an end of the mating coupling member 200 facing the mating connector side 52 in the mating coupling member housing 50, and forms a mating connector side front surface of the mating coupling member 200 together with the mating coupling member housing 50. The mating coupling member sealing member 60 seals the mating coupling member fluid passage 56 extending from the mating coupling member fluid connector 51 toward the mating coupling side 52 on the mating coupling side, and in this example, the mating coupling member fluid passage 56 extends coaxially with the mating coupling member longitudinal axis L2.

[0064] The mating coupling member housing 50 comprises a fastening portion 53, which extends from the mating coupling member side 52 toward the mating coupling member fluid connector 51 in the direction of the mating coupling member longitudinal axis L2 and comprises a mating coupling member side fastening structure 54, here for example two recesses 54a, for connecting to the coupling member side fastening structure 22. In the embodiment shown, the recesses 54a are only partially formed and correspond to the Figure 1 The position and size of the snap hook 22a of the fastening structure 22 of the mating coupling member 100. Therefore, the mating coupling member 200 can be connected to the mating coupling member according to the longitudinal axis L2 in only two parts. Figure 1 The connecting member 100 is provided.

[0065] In addition, the mating coupling member housing 50 includes two unlocking mechanisms 55 extending on the outer wall 50a in the direction of the mating coupling member longitudinal axis L2, and the connection between the mating coupling member side fastening structure 54 and the coupling member side fastening structure 22 of the coupling member 100 can be released via the two unlocking mechanisms 55. Figure 1 As shown. In the embodiment shown, the unlocking mechanism 55 is each a housing part elastically supported on the outer wall 50a, wherein the part facing the mating coupling side 52 and including the recess 54a is moved radially outward by radial pressure from the outside in the direction of the longitudinal axis L2 of the mating coupling member, i.e. opposite to the longitudinal axis L2 of the mating coupling member. As a result, the snap hooks engaged in the recess 54a will also be moved radially outward, so that the connection can be released.

[0066] refer to Figure 5 and 6 , the interaction of the coupling member 100 with the mating coupling member 200 in the coupling system 300 is described below. To this end, Figure 5 shows a disconnected state with Figure 1 The connection components and Figure 4 Schematic cross-sectional view of a coupling system 300 of a mating coupling member in a plane parallel to the longitudinal axis L1 or the longitudinal axis L2 of the mating coupling member. For simplicity, the corresponding longitudinal axis L1 or L2 and the elastic member 40 are not drawn here. For this purpose, reference is made to Figure 1 and 4 .

[0067] In the disconnected state shown, the snap hook 22a engages with the recess 54a so that the mating coupling member 200 is held by the coupling member 100. However, the coupling system 300 provides a disconnected state because the sealing member receptacle 20 is positioned at a maximum distance from the fluid connection 12, which does not allow fluid communication between the coupling member 100 and the mating coupling member 200. Due to the engagement of the snap hook 22a in the recess 54a, the mutually facing front surfaces of the sealing member 21 and the mating coupling sealing member 60 are pressed against each other in a fluid-tight manner with a constant surface pressure. The fluid opening 31 arranged parallel to the longitudinal axis L1 is sealed by the sealing member 21.

[0068] in this regard, Figure 6 Shows the connection status according to Figure 5 A schematic cross-sectional view of a coupling system 300 in a plane parallel to the longitudinal axis L1 or the longitudinal axis L2 of the mating coupling member. Again, for simplicity, the corresponding longitudinal axis L1 or L2 and the elastic member 40 are not drawn, and the corresponding reference is made to Figure 1 and 4 .

[0069] By rotating the mating coupling member sealing receptacle 20 in the direction of the thread 10c, for example, by rotating the mating coupling member 100 until the end of the thread 10c on the fluid connector side, the mating coupling member sealing receptacle 20 is in a position with a minimum distance from the fluid connector 12. This position corresponds to a connected state, in which the fluid opening 31 protrudes into the fluid channel 60 via the side of the mating coupling member sealing member 60 facing the mating coupling member fluid connector 51, thereby forming a fluid connection.

[0070] In this embodiment, the housing part 10a is configured such that the snap hooks 22a abut against an inner surface of the housing part 10a facing the longitudinal axis L1 in the connected state. This ensures the connection of the mating coupling member 200 with the coupling member 100 as they cannot be released via the release mechanism 55.

[0071] Figure 7 In addition, all disconnected Figure 4 and 5 An overview of the external view of the connection system, a cross-sectional view along the intersection line AA and the intersection line BB, and a perspective view. This leads to further design features of the described embodiment. Similarly, Figure 8 Shows the disconnected state according to Figure 7 An overview of a coupling system 300 in which a mating coupling member 200 is held by a coupling member 100, and Fig. 9 Coupling system 300 is shown in a connected state.

[0072] The invention is not restricted to the described embodiments. In particular, certain features of one embodiment are in principle applicable to other embodiments, unless reasonably excluded.

[0073] Reference numerals list

[0074] 10 Connecting member housing

[0075] 10a Housing part

[0076] 10b Threaded portion of the coupling member housing

[0077] 10c Thread

[0078] 10d Orthogonal part (thread)

[0079] 10e Recessed part (thread)

[0080] 11 Pointed object holder

[0081] 12 Fluid connections

[0082] 13 Connector side

[0083] 20 Sealing member receptacle

[0084] 20a Sealing member receiving seat guide structure

[0085] 21 Sealing member

[0086] 22 Fastening structure on the connecting member side

[0087] 22a Snap hook

[0088] 30 spikes

[0089] 31 Fluid opening

[0090] 40 Elastic member

[0091] 50 Matching connecting member housing

[0092] 51. Mating connection component fluid connection

[0093] 52 Mating connector side

[0094] 53 Fastening part

[0095] 54. Fastening structure on the side of the mating connection member

[0096] 54a Depression

[0097] 55 Unlocking mechanism

[0098] 56 Coupling component fluid channel

[0099] 60 Coordinating connecting member Sealing member

[0100] 100 Connecting components

[0101] 200 Coordinated connection components

[0102] 300 Connection System

[0103] L1 Longitudinal axis (connecting member)

[0104] L2 Longitudinal axis of the mating connection member

Claims

1. A coupling member (100) for a closed fluid delivery system, comprising: A coupling member housing (10) comprising a fluid connection (12) and a coupling side (13), wherein the coupling member housing (10) comprises a longitudinal axis (L1) extending from the fluid connection (12) towards the coupling side (13); a spike (30) comprising at least one fluid opening (31) and held in a spike receptacle (11) of the housing (10), the spike receptacle being arranged at the fluid connection and extending into the coupling member housing (10) in the direction of the longitudinal axis (L1), wherein the at least one fluid opening (31) is arranged in an end of the spike (30) facing the coupling side (13); a sealing member receptacle (20) arranged in the coupling member housing (10) on the coupling side; and a sealing member (21) arranged in the sealing member receptacle (20), wherein the coupling member housing (10) comprises a housing portion (10a) which at least partially surrounds the sealing member receptacle (20) in an axial direction relative to the longitudinal axis (L1), and the coupling member housing (10) comprises a coupling member housing threaded portion (10b) on an inner surface facing the sealing member (21), and The coupling member housing (10) and the sealing member (21) are guided by a sealing member receptacle guide structure (20a) and are movable in the direction of the longitudinal axis (L1) via the coupling member housing threaded portion (10b) between a position at a maximum distance from the fluid connection piece (12) and a position at a minimum distance from the fluid connection piece (12). wherein the sealing member receptacle (20) comprises at least two snap hooks (22a) at its end facing the coupling side (13), the at least two snap hooks (22a) serving as fastening structures (22) on the coupling member side of the mating coupling member (200) protruding in the direction of the longitudinal axis (L1) towards the coupling side (13), The housing portion (10a) is configured such that the snap hook (22a) abuts against an inner surface of the housing portion (10a) when the sealing member receptacle (20) is at a minimum distance from the fluid connector (12).

2. The coupling member (100) according to claim 1, wherein: When the sealing member receptacle (20) with the sealing member (21) is located at a position at a maximum distance from the fluid connection (12), the at least one fluid opening (31) is arranged in the sealing member (21).

3. The coupling member (100) according to claim 1 or 2, wherein: The coupling member housing threaded portion (10b) is formed as an internal thread, and the sealing member receptacle guide structure (20a) includes at least one protrusion engageable in the internal thread and protruding radially outward relative to the longitudinal axis (L1).

4. The coupling member (100) according to claim 1 or 2, wherein: The coupling member housing threaded portion (10b) includes at least two threads (10c) separated from each other.

5. The coupling member (100) according to claim 1 or 2, wherein: The coupling member housing threaded portion (10b) includes at least two threads (10c) facing each other.

6. The coupling member (100) according to claim 1 or 2, wherein: At least one thread (10c) of the coupling member housing threaded portion (10b) extends over an angle of less than 360° relative to the longitudinal axis (L1).

7. The coupling member (100) according to claim 1 or 2, wherein: At least one thread (10c) of the coupling member housing threaded portion (10b) extends over an angle of substantially 180° relative to the longitudinal axis (L1).

8. The coupling member (100) according to claim 1 or 2, wherein: At least one thread (10c) of the coupling member housing threaded portion (10b) comprises, at its end facing the fluid connection (12), an orthogonal portion (10d) relative to the longitudinal axis (L1).

9. The coupling member (100) according to claim 1 or 2, wherein: At least one thread (10c) of the threaded portion (10b) of the coupling member housing includes, at its end facing the fluid connector, a recessed portion (10e) toward the longitudinal axis (L1), the recessed portion (10e) being recessed relative to the thread (10c) in the direction of the connector side (13).

10. The coupling member (100) according to claim 1 or 2, wherein: The housing portion (10a) is rotatable relative to the longitudinal axis (L1).

11. The coupling member (100) according to claim 1 or 2, wherein: The sealing member receptacle (20) is rotatable relative to the longitudinal axis (L1) and / or the coupling member housing (10).

12. The coupling member (100) according to claim 1 or 2, wherein: The sealing member receptacle (20) together with the sealing member (21) forms at least a portion of the connector-side front surface of the coupling member (100).

13. The coupling member (100) according to claim 1 or 2, wherein: The sealing member receptacle (20) is supported in the coupling member housing (10) by an elastic member (40) which acts in the direction of the longitudinal axis and is arranged between the fluid connection (12) and the sealing member receptacle (20).

14. The coupling member (100) according to claim 13, wherein: The elastic member (40) is a compression spring member.

15. A coupling system (300) for a closed fluid delivery system, comprising at least one coupling member (100) according to any one of claims 1 to 14 and at least one mating coupling member (200), The mating coupling member (200) comprises: A mating coupling member housing (50) comprising a mating coupling member fluid connection (51) and a mating coupling side (52), wherein the mating coupling member housing (50) comprises a mating coupling member longitudinal axis (L2) extending from the mating coupling member fluid connection (51) toward the mating coupling side (52), and a mating coupling member sealing member (60) arranged in the mating coupling member housing (50) and forming at least a portion of a mating connector side front surface of the mating coupling member (200) together with the mating coupling member housing (50); The connection system (300) is configured such that the fluid opening (31) of the connection member (100) is at least partially arranged on a side of the mating connection member sealing member (60) of the mating connection member (200) facing the mating connection member fluid connector (51) when the connection member is connected to the mating connection member (200), and in the state, the sealing member receptacle (20) is located at a position at a minimum distance from the fluid connector (12) of the connection member (100).

16. The coupling system (300) according to claim 15, wherein: The mating coupling member housing (50) includes a fastening portion (53), which extends from the mating connector side (52) toward the mating coupling member fluid connector (51) in the direction of the mating coupling member longitudinal axis (L2), and the mating coupling member housing (50) includes a mating coupling member side fastening structure (54) for connecting to the coupling member side fastening structure (22).

17. The coupling system (300) according to claim 16, wherein: The mating coupling member side fastening structure (54) is a recess (54a) for accommodating the snap hook (22a).

18. The coupling system (300) according to claim 16 or 17, wherein: The mating coupling member housing (50) includes an unlocking mechanism (55) on an outer wall (50a) extending in the direction of the longitudinal axis (L2) of the mating coupling member, through which the connection between the mating coupling member side fastening structure and the coupling member side fastening structure is releasable.

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