Closure device for container

Abstract

The invention relates to a closure device (1) for a container (2) having a container opening (10), wherein the closure device (1) comprises a cover element (3) for closing the container opening (10), a chamber (4) assigned to the cover element (3) and an inner shell (5), wherein the chamber (4) and the inner shell (5) have a closure part (V) and an opening part adapted to each other. The chamber (4) is locked with the inner shell (5), wherein a first locking device (6) with the inner shell (5) is radially offset inwards relative to a vertical center line (x) of the closure device (1) compared to a maximum width (k) of the chamber (4) in an offset direction (L). In order to provide such a closure device, which enables the chamber to be emptied in an operationally convenient manner during the removal of the cover element, and which is further preferably capable of being advantageously manufactured, it is proposed that the first locking device (6) is constructed separately in the vertical direction (M) from a shoulder section (40) of the inner shell (5) constructed on the bottom side below the first locking device (6).

Description

Technical Field

[0001] The present invention firstly relates to a closure device for a container, which container has a container opening, wherein the closure device has a cover element for closing the container opening, a chamber assigned to the cover element and an inner shell, wherein the chamber and the inner shell have a closure part and an opening part adapted to each other, which interact in such a way that a medium contained in the chamber can escape into the container due to a movement of the cover element relative to the inner shell, and wherein the chamber furthermore has a freely protruding closure edge which points to the interior of the container in a state of use and which annularly surrounds a center axis of the chamber, and in a closed state the closure edge together with the inner shell has a closure effect, wherein the inner shell forms a chamber bottom bounded by the closure edge, and wherein the chamber is locked with the inner shell, wherein a first locking device with the inner shell is radially offset inwardly relative to a vertical center axis of the closure device compared to a maximum width of the chamber in the offset direction. Background Art

[0002] Closures of the aforementioned type are known in the prior art. These closures are used to close a container and at the same time provide a chamber for storing a liquid medium or a powdered medium separately, such as tea essence, etc., so that when the container is filled, the liquid medium or the powdered medium does not immediately come into contact and / or mix with the contents of the container, i.e., for example, water, but only when the closure is removed from the container. This is usually the moment when the contents of the container are to be consumed.

[0003] Document WO 2007 / 129116 A1 for example relates to a closure device of the above type, which releases the added liquid in the chamber into the container when the container closed with it is opened. The closure device has a cover element, a chamber and an inner shell. The inner shell has a discharge port, in which a closure connected to the inner shell is embedded in a sealing manner. The closure can be designed as a plug. The cover element and the inner shell can be connected to each other by a thread, wherein the cover element can be raised relative to the inner shell from a closed position in which the closure closes the chamber discharge port to a discharge position in which the closure is at least partially withdrawn from the discharge port, so as to provide a communication path from the chamber to the main liquid space of the container. Here, the medium stored in the chamber can escape into the container, wherein the medium that escapes mixes with the medium located in the container.

[0004] It is also known, for example, from document DE 10 2018 105 321 A1 that the closure is formed by a wall of the chamber itself, in particular by a freely protruding area of ​​a closure edge that points in the use state toward the interior of the container and surrounds the central axis of the chamber in an annular manner. The closure edge cooperates with the inner shell at least in the closed position. In order to release the discharge opening on the bottom side in the inner shell, the closure edge can be moved into the discharge position, in particular based on an axial or rotational relative movement of the closure edge relative to the inner shell. According to one embodiment, the chamber is locked with the inner shell over a lower narrowing section that transitions into an opening piece.

[0005] A closure device is known from DE 10 2014 107 550 A1, in which a downwardly open gap between a chamber and a chamber end piece adjoining the chamber inwards is filled with an injected plastic filling. Summary of the invention

[0006] Based on the prior art according to DE 10 2018 105 321 A1, the technical problem to be solved by the present invention is firstly to provide a closure device which can be operated well in particular with advantageous manufacturability.

[0007] This object is achieved by the invention in that the latching device is designed to be separate in the vertical direction from a shoulder section of the inner shell, which is designed on the bottom side below the latching device and is operatively connected to the container opening.

[0008] Based on the prior art according to DE 10 2014 107 550 A1, the technical problem to be solved by the present invention is also to establish an advantageous connection between the components of the chamber.

[0009] This technical problem is solved by a technical solution, according to which the two parts are welded to each other in the parting plane, wherein the welding is achieved by a supplementary section connected to the two parts and formed by injection molding, the supplementary section is designed to be annular, and a surrounding wedge surface on the outside in the cross section is freely cut out in the edge area of ​​the upper part to accommodate the supplementary section manufactured by injection molding this area, or the supplementary section bulges radially outward in the cross section and protrudes accordingly beyond the outer boundaries of the upper and lower parts facing the supplementary section.

[0010] The proposed novel locking of the chamber with the inner shell achieves an improvement in the emptying of the chamber, in particular during the removal of the cover element. The inner shell is operatively connected to the container opening of the container via the shoulder section, in particular in a friction-fitting manner, and optionally, and as is also preferred, the connection is also produced while forming a seal relative to the container opening.

[0011] Furthermore, the proposed design enables an advantageous assembly of the chamber and the inner housing, and also an advantageous assembly of the assembly consisting of the inner housing and the chamber with the container.

[0012] The locking device can be radially offset inwardly by an amount which can correspond to approximately one sixth to one half, further to approximately one quarter, of the maximum width of the chamber transversely to the vertical direction of the closure device.

[0013] The welding is achieved by a supplementary section connected to the two components and formed by injection molding. The supplementary section can, as is also preferred, consist of the same plastic material as the two components forming the chamber, or of a plastic material that enables welding to the two components. Thus, in a further embodiment, the supplementary section can contain polybutylene terephthalate, for example.

[0014] In addition to the possibly positive connection between the supplementary section and the two components of the chamber, the coating advantageously also makes it possible to weld the two components to the supplementary section and optionally to each other during the coating process.

[0015] In other designs, the two parts of the chamber can also be welded directly to each other in the parting plane. In this regard, ultrasonic welding is preferred.

[0016] In principle, the welded area, which is formed with the supplementary section if necessary, can be covered outwardly by a section of the tank, in particular the upper part of the tank, so that the welded area (or the surrounding welded area) is not visible when the closure is viewed from the outside. The upper part can extend in the manner of an apron beyond the welded area, preferably vertically downward relative to the normal position of use.

[0017] The plug connection between the upper part and the lower part, which is further preferably provided, can be used in particular to orient the two parts correctly relative to each other before and during the welding process. In addition, the stability in the welding area can be increased thereby.

[0018] It can also be provided that the locking device is constructed separately in the vertical direction from a shoulder section of the inner shell constructed on the bottom side below the locking device, and the two parts of the chamber are welded to each other in the parting plane, wherein the welding is achieved by a supplementary section connected to the two parts and formed by injection molding, or wherein the weld is covered to the outside by the upper part of the tank, and wherein the upper part of the tank is also plug-connected to the lower part.

[0019] The chamber being composed of two parts has proven to be advantageous both in terms of manufacturing technology and operating technology. With this design, the lower part of the two-part chamber can have a structural part, which cannot be manufactured or can only be manufactured very expensively when the chamber is manufactured in one piece in this shape. Thus, the two parts of the chamber can be manufactured, for example, from different materials. In the case where the chamber is preferably manufactured from a plastic material, different plastics or plastic mixtures can also be used at least partially, and different manufacturing methods can also be used if necessary, so that, for example, a plastic blow molding method is used for one part of the chamber, for example, the pot-shaped area of ​​the chamber, and an injection molding method is used if necessary to manufacture another part, which is used to fix the chamber as a whole to the inner shell and / or the cover element.

[0020] In this case, in particular the lower part of the chamber can also provide a closure element for interaction with the inner shell.

[0021] As a result, more favorable, in particular significantly smaller, diameter dimensions can be achieved in the region of the closure of the chamber compared to a one-piece chamber preferably produced using a plastic blow molding method, which also has a favorable influence on the friction between the chamber and the inner shell on the one hand and on the inner shell and on the inner surface of the container neck facing the inner shell on the other hand. Due to the two-part production of the chamber, the diameter ratio of the friction surface between the closure and the inner shell and the friction surface between the inner shell and the inner wall of the container neck facing the inner shell can be influenced in a favorable manner with regard to the necessary achievement of the friction fit between the inner shell and the container neck during the first opening rotational movement of the closure device.

[0022] Due to the two-piece design of the chamber, it is also possible to advantageously arrange the locking devices between the inner shell and the chamber and between the chamber and the cover element on such different diameters that the locking protrusions and locking recesses of these locking devices extend without overlapping each other in a projection into a common plane transverse to the vertical axis.

[0023] According to a further preferred embodiment, the latching device between the inner shell and the chamber can be formed on a freely standing cylindrical section of the inner shell. This freely standing cylindrical section can extend freely in the axial direction, for example, from the root area of ​​the shoulder section into the surrounding wall of the inner shell, which is also preferably designed as a pot on the bottom side, and further preferably in such a way that the end of the cylindrical section pointing vertically upward in the normal use position is preferably not supported radially inside and outside.

[0024] Furthermore, according to a possible design, the cylinder section may extend substantially radially inwardly at a distance and at least approximately concentrically relative to a portion of the shoulder section.

[0025] In another embodiment, the inner shell has both an internal thread for cooperating with an external thread of the container and a sealing lip spaced radially inward from the internal thread. The sealing lip can, as is also preferred, extend substantially concentrically with respect to the region of the inner shell having the internal thread. In the assembled position, the container neck extends between the internal thread and the sealing lip, on which the closure device is held by a threaded connection. In the normal use position, the free end of the sealing lip pointing in the axial direction of the closure device preferably points downward, correspondingly preferably in the opposite direction to the orientation of the free end of the cylinder section described above.

[0026] The sealing lip can be designed to overlap radially with respect to the internal thread. In this regard, the sealing lip is completely covered by the region of the inner shell that has the internal thread.

[0027] On two planes separated from each other in the vertical direction based on the usage state of the closure device, the chamber, the cover element and the inner shell can also be locked with locking protrusions and locking recesses on the chamber, the cover element and the inner shell, wherein the locking device with the inner shell is radially offset inward along the vertical center axis of the closure device relative to the locking device with the cover element, wherein the locking protrusions and locking recesses of the plane extend without overlapping each other when projected into a common plane transverse to the vertical axis.

[0028] This latching of the chamber with the inner shell and the cover element is also an improvement in terms of emptying the chamber, especially during the removal of the cover element. Here, compared to the latching of the chamber with the cover element, the latching of the chamber with the inner shell is realized on a significantly smaller transverse dimension relative to the central axis, if necessary on the diameter.

[0029] Here, the locking areas can be arranged with such different lateral dimensions relative to the center axis or, if the closure device is designed to be rotationally symmetrical, on such different diameters that the locking devices, in particular the locking protrusions and locking recesses of these locking devices, do not overlap in their projections into a common plane extending transversely to the center axis.

[0030] In this case, the latching means can also be spaced apart from the central axis in such a different manner relative to the central axis that, in a projection into a common plane, there is also a distance between the latching regions.

[0031] According to a possible design scheme, for example, when the closing device is designed to be rotationally symmetrical and the center axis also constitutes the rotation axis, the locking device between the chamber and the inner shell can be arranged on a diameter circle whose diameter can be equal to 0.3 to 0.7 times, further for example approximately 0.45 to 0.55 times, of the diameter of the locking device between the chamber and the cover element.

[0032] The relevant diameter line extending in the plane here preferably extends centrally, viewed radially relative to the central axis, between a radially inner or outer groove bottom of the latching recess and a radially outer or inner end of a latching projection cooperating with the latching recess.

[0033] Advantageous manufacturability, in particular advantageous locking during assembly of the closure device, can also be achieved by arranging and designing the locking means on preferably significantly different diameters.

[0034] According to other possible designs, the latching projection can be configured on the parts (or lower part) that are positioned below in the common use of the closure device in a vertical direction. Here, the lower part can for example be a hard plastic part, which can also for example be manufactured in an injection molding process.

[0035] In addition, both parts of the chamber can be made of hard plastic. Both parts can also be made of the same hard plastic or substantially made of the same hard plastic. Therefore in this regard, polypropylene (PP), polyethylene (PE) or polyethylene terephthalate (PET) can be used as hard plastic material.

[0036] Both parts may also comprise polybutylene terephthalate (PBT).

[0037] The supplementary section can be designed in annular form, wherein it preferably surrounds the two components over the entire circumference relative to a central axis of the closure device, wherein this annular enclosure can preferably occur only in a region assigned to one of the plurality of parting planes.

[0038] In one possible embodiment, the supplementary section is designed with a barb relative to the corresponding sections of the two components, based on a vertical section of the vertical center axis as a line. In this way, a positive connection is formed between the supplementary section and one or another component, preferably relative to the two components of the chamber, as a supplement to welding if necessary.

[0039] This optionally additional positive connection has proven to be advantageous in particular when the closure device is already filled and the stored medium is preferably contained at an overpressure in the chamber.

[0040] Furthermore, based on the vertical section, the supplementary section can also be formed essentially as a triangle or trapezoid. In the case of a triangular configuration, the supplementary section can be embedded in a wedge-shaped manner in the parting plane between the sections of the two components facing each other and preferably welded to the two components.

[0041] In the case of a trapezoidal design of the supplementary section, for example, a dovetail-shaped barb can be produced relative to the fastening region of the two components of the chamber.

[0042] These barbs can advantageously, as is also preferred, be realized by injection molding with the supplementary section material.

[0043] Therefore, the supplementary section can also clamp the two parts in radial direction with respect to the central axis or the vertical axis. In addition, as an alternative to this radial clamping or in combination therewith, the clamping of the two parts in the vertical direction can also be realized by correspondingly constructing the barbs that act in the vertical direction.

[0044] In view of the disclosed content, the ranges or value ranges and multiple ranges shown above and below also include all intermediate values, in particular in intervals of one tenth of each dimension, if necessary also of the dimensionless size. For example, the provision of 0.3 to 0.7 times also includes the disclosure of 0.31 to 0.7 times, 0.3 to 0.69 times, 0.31 to 0.69 times, etc. The disclosed content serves on the one hand to define the lower limit and / or upper limit of the range, but alternatively or additionally also serves to disclose one or more individual values ​​within each given range. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The invention is explained below in conjunction with the drawings, which however only show exemplary embodiments. Components which are described only with respect to one of these exemplary embodiments and which are not replaced by other different components in another exemplary embodiment due to their outstanding features there are also described as at least possible existing components for this other exemplary embodiment. In the drawings:

[0046] Figure 1 A longitudinal section shows the closure device when arranged on a container, which relates to the closed position;

[0047] Figure 2 A partial view showing the chamber bottom area relates to an alternative embodiment;

[0048] Figure 3 A schematic diagram showing the projection of two locking devices in a common plane;

[0049] Figure 4 Show Figure 1 An enlarged view of region IV in FIG.

[0050] Figure 5 Show according to Figure 1 A cross-sectional view of line VV in FIG.

[0051] Figure 6 Shown with Figure 4 A corresponding diagram, but it relates to the discharge location;

[0052] Figure 7 Show according to Figure 1 A cross-sectional view of line VII-VII in FIG.

[0053] Figure 8 A longitudinal section through the closure device is shown, which relates to an exploded view of the tank, the cover element of the closure device and the inner shell;

[0054] Fig. 9 A separate perspective view of the inner shell is shown;

[0055] Fig.10 A separate perspective view of the cover element is shown;

[0056] Fig.11 Show Figure 1 An enlarged view of region XI in FIG.

[0057] Figures 12 to 16 Shown respectively with Fig.11 Basically corresponding figures, but relating to another embodiment;

[0058] Fig.17 Shown with Fig.11 A corresponding detail drawing, but relating to another embodiment;

[0059] Fig.18 Show according to Figure 1 A diagram relating to another embodiment;

[0060] Fig.19 Show Fig.18 A magnified view of region XIX in FIG.

[0061] Fig. 20 Another embodiment of the present invention is Figure 1 a corresponding diagram;

[0062] Fig.21 Shown in accordance with Fig. 20 A schematic diagram of the arrangement of two chamber components of the device during ultrasonic welding;

[0063] Fig. 22 Show Fig.21 A magnified view of region XXII in FIG.

[0064] Fig.23 Shown with Fig. 22 A corresponding illustration, but after the ultrasonic welding process has been carried out;

[0065] Fig.24 Show according to Fig.21 An isolated perspective view of the inner shell of an embodiment of ;

[0066] Fig.25 Shown with Fig.24 A substantially corresponding representation, but without the sealing element. DETAILED DESCRIPTION

[0067] First refer to Figure 1 A closure device 1 for a container 2 is shown and described, wherein the closure device 1 essentially comprises a cover element 3, a chamber 4 and an inner shell 5, wherein the chamber 4 is snap-connected to the inner shell 5 via a (first) snap-connecting device 6. The chamber 4 preferably consists of two parts 8, 9, which are connected to one another in a parting plane E extending perpendicularly to the vertical center axis x.

[0068] Figure 1 Also shown is an upper partial area of ​​a container 2 , here for example in the form of a beverage bottle, on whose container opening 10 the closure device 1 is arranged.

[0069] The closure device 1 is located relative to the container 2 in a position in which the container opening 10 is closed in a fluid-tight manner, wherein the closure device 1 is screwed onto the container 2 in the usual manner so that the container opening 10 is closed.

[0070] In this state, the container 2 can be stored for a longer period of time without the content escaping from the container 2. To open the container 2, the closure device 1 is unscrewed from the container 2 in the usual manner, so that the container opening 10 is finally completely exposed.

[0071] The closure device 1 has a chamber 4 for separately storing, for example, a liquid medium or a powdered medium, which medium is not released into the content of the container 2 until the moment when the closure device 1 is removed from the container 2 .

[0072] As also shown and preferred, the chamber 4 can be composed essentially of two parts 8, 9. Here, the two parts 8, 9 can be made of the same material, in particular of the same hard plastic, thus for example of PE, PET or PP, wherein, in addition, according to a possible embodiment, the two parts can also be made completely of PBT or have a portion of PBT (polyethylene terephthalate).

[0073] The upper part 8 based on the normal use position of the closure device 1 , in which the axis x runs essentially vertically, can be produced in a plastic injection blow molding method, alternatively in an injection molding method.

[0074] The lower part 9 of the chamber 4 , which is associated therewith, can likewise be produced in an injection molding process.

[0075] Here, the upper part 8 can also have a pot-like shape, wherein an inverted arrangement is provided relative to the pot shape. The connection to the lower part 9 preferably takes place along an edge region of the upper part 8 surrounding the downwardly directed pot opening.

[0076] Preferably permanent, in operation and by the user, the connection that cannot be released, especially can not be released without loss.In addition about this point, especially when the medium is accommodated in the chamber 4 with the pressure higher than the ambient pressure, preferably also pressure-resistant connection.

[0077] The lower part 9 forms a preferably centrally located discharge connection 11 .

[0078] According to the illustration, the inner housing 5 can be pot-shaped and have a surrounding pot wall and a collar 12 for support on a container edge surrounding the container opening 10 .

[0079] A sealing lip 13 can be formed circumferentially on the underside of the inner housing flange 12. Figure 1 In the assembled position, the sealing lip interacts with the container wall surrounding the container opening 10 .

[0080] A chamber bottom 14 is formed on the bottom side, which transitions circumferentially over its entire circumference into a groove 15. The groove 15 is based on Figure 1 The cross-sectional view in FIG. 4 is bounded by a radially inner groove side wall 16 and a radially outer groove side wall 17 as well as a groove bottom 18 .

[0081] The radially inner side wall 16 transitions at the bottom into the groove bottom 18 and at the top into the chamber bottom 14 axially spaced from the groove bottom 18. As also shown, the chamber bottom 14 can extend essentially transversely to the vertical center axis x and can also be oriented parallel to the groove bottom 18 if necessary.

[0082] The radially outer groove side wall 17 can essentially form the shell wall of the inner shell 5 .

[0083] In particular, the soft plastic layer 19 can cover the surface of the groove bottom 18, as is also preferred, and further preferably also covers the surface of the radially inner groove side wall 16 pointing toward the groove space, and if necessary, also covers the surface of the chamber bottom 14 facing the chamber 4 as shown. The soft plastic layer can be manufactured together with the inner shell 5 in a two-component injection method, as is also preferred. Alternatively, the soft plastic layer 19 can be manufactured separately as a pot-shaped part and can be fixed on the inner side of the inner shell 5 by snapping, for example.

[0084] according to Fig.25 In the embodiment shown, ribs 45 which point vertically outward and extend in the axial direction can be formed circumferentially on the groove side walls 16 and (additionally) provide a positive connection between the inner shell 5 and the soft plastic layer 19 in the circumferential direction.

[0085] Figure 2An alternative embodiment is shown in which the chamber bottom 14 is not covered by the soft plastic layer 19. The soft plastic layer extends only in the region of the grooves 15 in such a way that it substantially lines the grooves.

[0086] For example, thermoplastic elastomer (TPE) may be used to manufacture the soft plastic layer 19 .

[0087] As also especially by Figure 1 As can be seen, the chamber bottom 14 can have an opening 20 in the center, which is covered by the soft plastic layer 19 toward the chamber interior and through which opening correct filling, in particular pressure filling, of the chamber 4 can be checked before the closure device 1 is mounted on the container 2 .

[0088] A drain opening 21 is also provided on the bottom side of the groove 15, which extends through both the groove bottom 18 and the section of the soft plastic layer 19 covering the groove bottom 18. The drain opening can, as is also preferred, have a circular, circumferential opening edge when viewed in a plane transverse to the vertical center axis x and, if necessary, have a diameter which can be equal to the radial width of the groove 15 between the radially inner groove side wall 16 and the radially outer groove side wall 17. In addition, the groove 15 can preferably have only one such drain opening 21.

[0089] The soft plastic layer 19 forms a sealing element 22 for interaction with a closure V which, in the embodiment shown, is formed essentially in the form of a plug, in particular by a wall of the discharge connection 11 .

[0090] The outlet connection 11 extends substantially in the manner of a cylinder, wherein the free, correspondingly annularly circumferential end which points downward in the usual manner in the state of use and which forms the closure V engages in a groove 15 of the inner housing 5 .

[0091] The closure V, here respectively the annular end region of the discharge connection 11, is permanently seated in the sealing element 22, here in the groove 15, and therefore preferably does not move relative to the sealing element in a direction perpendicular to the center axis x. Preferably only a circumferential movement of the closure V relative to the sealing element 22, in particular relative to the soft plastic layer 19, occurs, for example in a stop-limited manner, over a further angle of, for example, approximately 180 degrees.

[0092] The closure V can have an outlet shaping 23, for example in the form of a groove which is open radially inwards towards the radially inner groove side wall 16 and axially downwards towards the edge of the discharge opening 21. Figure 1 , Figure 4 , Fig.18 and Fig. 20In the closed position shown in the figure, the dispensing formation can be oriented offset by approximately 180 degrees with respect to the dispensing recess 24 formed in the region of the inner groove side wall 16 facing the groove 15 . The dispensing recess is correspondingly formed in the region of the soft plastic layer 19 .

[0093] The output recess 24 can also be formed in the form of a groove, in particular in the form of an axially extending groove. In addition, according to the embodiment shown, the output recess 24 can be arranged axially spaced relative to the discharge opening 21 in the transition from the inner groove side wall 16 to the chamber bottom 14.

[0094] Accordingly, a local radial widening of the groove 15 is produced in the region of the outlet recess 24 .

[0095] Due to the rotational movement, the plug-shaped closure element V is rotated so as to be seated in the groove 15, for example according to Figure 6 In the discharge position, the discharge shaped portion 23 and the discharge recess 24 are oriented in a coordinated manner. The groove-shaped discharge structures overlap in the axial direction, and the discharge shaped portion 23 is assigned to the discharge opening 21, so that these discharge structures form a flow path for discharging the medium located in the chamber 4 through the discharge opening 21 into the container interior.

[0096] As also from Figure 6 As can be seen from the illustration in , in this discharge position, a changed discharge direction of the medium stored in the chamber 4 occurs in the direction perpendicular to the center axis x. In this case, as is preferred and shown, a change in direction from the radial inside to the radial outside can also occur, thereby enabling an advantageous and possibly delayed discharge of the medium into the container 2.

[0097] The relative rotation of the chamber 4 equipped with the closure V relative to the inner shell 5 is preferably limited by a stop. For this purpose, for example, a radial projection 25 can be formed on the chamber 4, for example radially outside on the discharge connection 11, which can cooperate with a correspondingly positioned stop 26 or 27 of the inner shell 5 (see Figure 5 and Fig.25 ).

[0098] Chamber 4 or in accordance with Figures 1 to 16 In the embodiment, the rotation of the cover element 3 connected to the chamber 4 in a rotationally fixed manner beyond the stop limit to the open position for discharging the medium stored in the chamber 4 into the interior of the container causes the closure device 1 to be completely unscrewed from the container 2 in the usual manner, and accordingly the container opening 10 is completely exposed.

[0099] The rotationally fixed connection between the chamber 4 and the cover element 3 can be provided by the engagement of entraining ribs 28 which are formed on the chamber 4, in particular on the lower part 9, on the wall outside and project radially outward in a wing-like manner and which can engage in corresponding entraining receptacles 29 of the cover element 3 (see in particular Figure 7 ).

[0100] The entrainer ribs 28 and preferably also the above-mentioned radial projections 25 can be formed integrally with the lower part 9 of the chamber 4 and made of a uniform material and can preferably be produced in an injection molding process.

[0101] Furthermore, viewed in the axial direction, the lower part 9 can have a preferably annularly circumferential latching projection 30 between the end region of the discharge connector 11 which essentially forms the closure V and the region having the radial projection 25 relative to the vertical center axis x. The latching projection 30 engages in a groove-like latching recess 31 formed on the inner wall of the surrounding inner housing wall in order to produce the first latching device 6.

[0102] In addition to the first latching device 6 thus produced, a rotatable mounting for the chamber 4 , in particular for the lower part 9 of the chamber, can thereby be provided on the inner shell 5 .

[0103] The first latching means 6 can be deflected radially inwards in the deflection direction L, as is also preferred, compared to the maximum width k of the chamber 4 measured transversely to the vertical direction M resulting from the orientation of the vertical center axis x, which maximum width can be produced in the region of the component 8 according to the embodiment shown. The extension in the region of the first latching means 6, also observed transversely to the vertical direction M, can be equal to approximately 0.4 to 0.8 times, further approximately 0.5 to 0.6 times, the above-mentioned width k of the chamber 4.

[0104] according to Figures 18 to 25 In the embodiment shown, the chamber 4 can basically have only one such first latching device 6 between the chamber 4 and the inner shell 5. In this case, the first latching device 6 can also be separated from the shoulder section 40 of the inner shell 5 which is configured on the bottom side below the first latching device 6 in the vertical direction M as is also preferred (see Fig.18 and Fig.25 ).

[0105] The shoulder section 40 adjoins the upper end of the pot-shaped circumferential groove side wall 17 on the outside and extends in an upward arc at a distance approximately parallel to the sealing lip 13 into the collar 12 extending essentially transversely to the vertical center axis x.

[0106] The shoulder section 40 is connected vertically upwards via the root region on the groove side wall 17 by a freely standing cylinder section 42 , on the radially inwardly directed wall of which the latching recess 31 , for example in the form of a circumferential groove, is formed.

[0107] Viewed from the groove bottom 18 , the cylinder section 42 ends at a certain distance in front of the plane generated by the flange 12 .

[0108] Accordingly, when the chamber 4 is rotated relative to the inner shell 5 in order to release the discharge opening 21, a circumferential friction surface can be generated between the lower part 9 of the chamber 4 and the inner shell 5, and thus in particular in the interaction area of ​​the latching projections 30 and the latching recesses 31, and optionally also between the free end of the discharge connector 11 forming the closure V and the in particular radially outer groove side wall 17. These friction surfaces extend at least approximately in an area with the same diameter a, which can be approximately equal to 0.4 to 0.6 times the free inner diameter b in the area of ​​the container opening 10.

[0109] The inner shell 5 can also be held on the container 2 in the region of the container opening 10 only in a friction fit, in particular because the sealing lip 13 in the region of the container opening 10 rests on the inner side facing the sealing lip (see Figure 1 ). Due to the above-mentioned arrangement and construction of the discharge connection 11 and the first locking device 6 between the inner shell 5 and the chamber 4, favorable conditions in terms of friction can be generated, so that in particular when the chamber 4 is rotated together with the cover element 3 by 180 degrees into a position that releases the discharge opening 21, the friction between the inner shell 5 and the container 2 is not affected or is substantially not affected.

[0110] The friction surface between the inner shell 5 in the area of ​​the sealing lip 13 and the inner wall of the container 2 in the area of ​​the container opening 10 preferably extends over the above-mentioned diameter b, and the second locking device 7 between the chamber 4 and the cover element 3 can also extend substantially over this diameter b.

[0111] exist Figures 1 to 16 In the embodiment shown, in addition to the first latching device 6, a second latching device 7 can be provided between the inner shell 5 and the cover element 3. The second latching device 7 can be realized by forming an additional latching protrusion 32 on the chamber 4, in particular on the lower part 9. The latching protrusion 32 can be formed as in the Fig. 9 As shown in FIG. 2 , it is designed as a radial projection in the region of the entrainment rib 28 .

[0112] On the cover element side, latching recesses 33 can also be provided here on the underside of the entrainment receptacles 29 for the entrainment ribs 28. The latching recesses 33 of the illustrated embodiment can be exposed vertically downward, as also shown.

[0113] The latching projection 32 and the latching recess 33 can also be designed, as is also preferred, to be circumferentially concentric with respect to the axis x.

[0114] As also especially from Figure 1 As can be seen from the sectional view in , the paired locking protrusions 30 or 32 and the locking recesses 31 or 33 extend at different radial distances relative to the vertical center axis x, wherein the locking protrusions 32 and the locking recesses 33 of the upper second locking device 7 have a larger radial spacing than the locking part pairs of the first locking device 6.

[0115] In the case of a possible projection of the latching element pairs of the first latching device 6 and the second latching device 7 in a common plane extending transversely to the vertical center axis x, there is no overlap of the latching projections 30 and 32 and no overlap of the latching recesses 31 and 33. Instead, they are radially spaced apart from each other.

[0116] A line running concentrically to the vertical center axis x and running centrally through the respective locking device 1 or 2 in the region of the first locking device 6 has approximately a diameter which can be approximately 0.4 to 0.6 times the equivalent circular line in the region of the second locking device 7 .

[0117] Advantageous assembly can be achieved by means of the latching device described with reference to the first embodiment. Figure 8 Referring to the usual position of use, the components 8 and 9 constituting the chamber 4 can be inserted from above into the cover element 3 and locked with the cover element (see arrow c), while the inner shell 5 is inserted from below into the cover element 3 in the opposite direction and connected with the chamber 4 in the region of the first locking device 6 (see arrow d).

[0118] In this assembly position, the closure device 1 can be filled.

[0119] As can be seen, the first latching device 6 and the second latching device 7 are designed in the region of different planes F and G spaced apart from each other in the axial direction so that the first latching device 6 and the second latching device 7 do not overlap when they are projected into a common plane H oriented transversely to the axis x. Instead, a distance t is created between the radially outer second latching device 7 and the radially inner first latching device 6 (see Figure 3 ).

[0120] Figures 11 to 17 Different embodiments are shown with regard to the connection of two components 8 and 9 for forming the chamber 4 .

[0121] Preferably, a welded connection is provided in each case. The welded connection can firstly be realized, for example, by ultrasonic welding, if necessary by directly connecting the two parts 8 and 9 in the region of the free end edge 34 of the upper part 8 and the corresponding base region 35 of the lower part 9 .

[0122] according to Fig.11 In the embodiment of ...

[0123] In a broad sense, the supplementary section 36 can form a connecting weld seam, wherein the supplementary section 36 can be designed as a whole in an annular shape.

[0124] In an alternative embodiment, the supplementary section can be designed with a barb, as shown in the figure, relative to the vertical section, in particular with a barb 37 acting in the radial direction.

[0125] according to Fig.12 This can be provided, for example, by a trapezoidal shape in cross section of the supplementary section 36, wherein a substantially dovetail-shaped wedge connection can also be achieved thereby. Accordingly, as a supplement to the welded connection, a positive fit connection acting in the radial direction is preferably also produced.

[0126] Here, the barb 37 can be realized with respect to only one of the components 8 or 9, so that for example Fig.14 The illustration in FIG. 1 is realized with respect to the lower part 9 , whereas with respect to the other part (here the upper part 8 ) no such barb can be provided.

[0127] As an alternative or in addition to such radial barbs 37, axially acting barbs 38 can also be provided so that the supplementary section 36 clamps the two components 8 and 9 together in a vertical direction (see Fig.15 and Fig.16 ).

[0128] In this case, according to Fig.15 The illustration in FIG. 3 may provide the axial barb 38 only in the base region 35. Alternatively, it may be possible to Fig.16 As shown, further axial barbs 38 ′ are provided in the edge region 34 of the upper part, whereby a secure clamping can be achieved.

[0129] The axial barbs 38 formed only in the edge region 34 of the upper part 8 can produce an advantageous connection in combination with the radial barbs 37 in the base region 35 (see Fig.14 ).

[0130] As also especially from Figures 12 to 16 As can be seen from the illustration in , the supplementary section 36 can be raised radially outward relative to the cross-sectional view and correspondingly protrude beyond the outer boundaries of the upper part 8 and the lower part 9 toward the supplementary section. Thus, an annular flange 39 can be produced, which is generally against the outer wall of the chamber 4 and preferably surrounds the outer wall.

[0131] The weld seam indirectly formed by the supplementary section 36 can also be surrounded radially on the outside and in a circumferential manner by the axially upwardly projecting collar 46 of the cover element 4. The weld seam is thus concealed.

[0132] According to, for example, Figure 1 In the embodiment shown in , the cover element 3 can have an internal thread 43, which cooperates with the external thread 44 of the container 2 and is preferably designed to overlap radially with the sealing lip 13. The cover element 3 surrounding the container neck is used as a gripping element for opening the container 2, wherein the rotation of the chamber 4 relative to the inner shell 5 is first driven by the rotation of the cover element 3 through the linkage, and when the rotation stop is reached, the medium is released into the container 2, and the inner shell 5 is also screwed out, so that the unit composed of the chamber 4, the inner shell 5 and the cover element 3 can be removed from the container 2 afterwards.

[0133] Alternatively, the threaded connection between the container 2 and the closure device 1 may be provided by the inner shell 5 (see Fig.18 and Fig. 20 For this purpose, the inner shell has an internal thread 43 on a circumferential section 47 protruding from the radial outer end of the flange 12, coaxially circumferentially relative to the vertical center axis x and oriented radially overlapping the sealing lip 13, which is used to cooperate with the external thread 44 of the container 2.

[0134] In accordance with Fig.18 and Fig. 20 In the unused position, the lateral section 47 is preferably completely surrounded by the cylindrical circumference 48 of the chamber 4. In particular, the cylindrical circumference 48 is integrally formed on the component 9 and is further preferably formed of uniform material. The cylindrical circumference 48 surrounds the lateral section 47 at a certain distance and without any entrainment.

[0135] The diameter of the cylinder circumference 48 is preferably enlarged in the region of the component 8 compared to the outer diameter of the chamber 4 , so that an outward radial step is produced in the transition, in which step region the connection of the components 8 and 9 preferably takes place.

[0136] With the help of Fig.18 and Fig.19 In the embodiment shown, here too, a supplementary section 36 can be used which is supported on the underside of the component 8 and on the above-mentioned step.

[0137] according to Figure 20 to Figure 25 In the embodiment in FIG. 1 , the components 8 and 9 can also be directly welded, in particular ultrasonically welded.

[0138] For this purpose, the upper part 8 can, for example, have, on its edge pointing downward toward the welding flange 49 formed by the base region 35, a circumferential material excess 50 which is, for example, wedge-shaped in cross section and which melts during the ultrasonic welding process and serves to form the weld seam (see Figure 21 to Figure 23 ). To realize this process, for example, the component 8 of the chamber 4 is placed in an inverted position on a form-fitting anvil 51, the component 9 is positioned accordingly and ultrasonic welding is carried out in a targeted manner in the region of the circumferentially arranged excess material 50 by means of an ultrasonic generator 52 (see Fig.21 ).

[0139] The resulting direct welded connection, in particular the weld seam produced thereby, is preferably covered radially outwardly by an axial collar of the upper part 8 of the chamber 4 , which forms a cylindrical circumference 48 surrounding the lateral section 47 of the inner shell 5 .

[0140] Preferably, regardless of the type of welded connection, the parting plane E between the parts 8 and 9 of the chamber 4 passes through the overlapping section 41 of the lower part 9 of the chamber 4. The overlapping section 41 preferably bears radially inwardly against the end region of the upper part 8 facing the overlapping section and thus provides radial support for the upper part, which is particularly advantageous during welding. The overlapping section 41 is used for the plug connection of the parts 8 and 9.

[0141] As for example with Fig.17 As shown in the figure in FIG, in addition to the described overlapping section 41, a further overlapping section 41' can also be provided radially outside the edge region 34 of the chamber upper part 8, so that a slot 55 for the downwardly directed edge region 34 of the component 8 is produced on the welding flange 49 of the chamber lower part 9 formed by the base region 35. In this case, the parting plane E can pass through both the radially inner overlapping section 41 and the radially outer overlapping section 41', as is also preferred.

[0142] This radially outer overlapping section 41 ′ which may be provided can be used, for example, in Fig.19As shown in FIG. 5 , a radial through-hole 56 is provided, so that a plurality of overlapping areas extending in a bridge-like manner are generated circumferentially. Through the radial through-hole 56, the material of the supplementary section 36 can enter between the components 8 and 9 of the chamber 4 during the injection molding of the welding area. The welded connection is supported by the additionally generated form fit.

[0143] exist Figures 18 to 25 In the embodiment of the present invention, the cylindrical circumference 48 of the chamber 4 is used as a gripping element for opening the container 2. By rotating the chamber 4, the chamber is moved relative to the inner shell 5 to a position for releasing the medium in the chamber 4, and then the inner shell 5 is driven in the rotation direction by the rotation stop, which realizes the overall screwing movement of the closure device 1 relative to the container 2.

[0144] When unscrewing from the container 2 , independently of the embodiment described, the original ring 53 is torn off.

[0145] like Fig.18 As shown in the example in , an eccentric pin 54 oriented essentially in the vertical direction M can also be formed in the chamber 4, for example in the funnel-shaped inlet of the lower part 9 facing the groove 15. When the medium flows out of the chamber 4, such a pin can have a favorable influence on the outflow characteristics of the medium, for example by applying a swirl to the medium.

[0146] In the discharge position, the Figure 6 An alternative course of the embodiment shown.

[0147] The above embodiments serve to explain the invention generally included in the present application, which expands the prior art at least by the following feature combinations, also independently, wherein two, more or all of these feature combinations can also be combined with each other, namely:

[0148] A closure device, characterized in that the first latching device 6 is designed to be separate in the vertical direction M from a shoulder section 40 of the inner shell 5 which is designed on the bottom side below the first latching device 6 .

[0149] A closure device, characterized in that the two components 8 , 9 are welded to one another in a parting plane E, wherein the welding is effected via a supplementary section 36 which is connected to the two components 8 , 9 and is formed by injection molding.

[0150] A closure device, characterized in that the two parts 8 , 9 are welded to one another in a parting plane E, wherein the weld is covered to the outside by the upper part 8 , and wherein the upper part 8 of the chamber 4 is additionally plug-connected to the lower part 9 .

[0151] A closure device is characterized in that the first latching device 6 is formed on a freely standing cylindrical section 42 of the inner shell 5 .

[0152] A closure device is characterized in that the inner shell 5 has both an inner thread 43 for cooperating with an outer thread 44 of the container 2 and a sealing lip 13 spaced radially inward from the inner thread 43 .

[0153] A sealing device, characterized in that the sealing lip 13 is designed to overlap radially relative to the internal thread 43.

[0154] A closure device, characterized in that, in two planes F and G separated from each other along a vertical direction M based on the usage state of the closure device 1, the chamber 4 is locked with the cover element 3 and the inner shell 5 under the condition that the chamber 4, the cover element 3 and the inner shell 5 are constructed with locking protrusions 30, 32 and locking recesses 31, 33, wherein the first locking device 6 with the inner shell 5 is radially offset inwardly relative to the second locking device 7 with the cover element 3 based on the vertical center axis x of the closure device 1, wherein the locking protrusions 30, 32 and locking recesses 31, 33 of the planes F and G extend without overlapping each other when projected into a common plane H transverse to the vertical center axis x.

[0155] A closure device, characterized in that latching projections 30, 32 are formed on a lower part 9 in the vertical direction.

[0156] A closure device, characterized in that the two parts 8, 9 are made of hard plastic.

[0157] A closure device, characterised in that both parts 8, 9 contain polybutylene terephthalate.

[0158] A closure device, characterized in that the supplementary section 36 is designed to be annular.

[0159] A closure device is characterized in that the supplementary section 36 is designed with barbs 37 , 38 based on a vertical section represented as a line perpendicular to the center axis x.

[0160] A closure device is characterized in that, based on the vertical section, the supplementary section 36 is formed essentially in the shape of a triangle or a trapezoid.

[0161] A closure device is characterized in that the supplementary section 36 clamps the two components 8 , 9 together in the vertical direction.

[0162] All disclosed features (either by themselves or in different combinations) are important to the present invention. Therefore, the disclosure of the present application also includes all the contents disclosed in the relevant / attached priority document (copy of the prior application), and for this reason, the features of the priority document are also included in the content claimed for protection of the present application. The subordinate content claimed for protection, with its features, can characterize the unique creative improvement scheme of the prior art even when it does not have the technical features of the cited content claimed for protection, and is particularly used to take a divisional application based on the technical features. The invention described in each content claimed for protection may additionally have one or more features described in the previous description, in particular with figure marks and / or in the list of figure marks. The present invention also relates to a variety of design methods, in which some of the features mentioned in the above description are not implemented, especially when they are considered to be insignificant for the corresponding purpose of use or can be replaced by other means with the same technical effect.

[0163] Reference numerals list

[0164] 1 Closure device

[0165] 2 Container

[0166] 3 Cover element

[0167] 4 Chambers

[0168] 5 Inner shell

[0169] 6 First locking device

[0170] 7 Second locking device

[0171] 8 Components

[0172] 9 Components

[0173] 10 Container opening

[0174] 11 Discharge connector

[0175] 12 Flange

[0176] 13 Sealing lip

[0177] 14 Chamber bottom

[0178] 15 Groove

[0179] 16 Groove sidewall

[0180] 17 Groove sidewall

[0181] 18 Groove bottom

[0182] 19 Soft plastic layer

[0183] 20 Opening

[0184] 21 Discharge port

[0185] 22 Sealing element

[0186] 23 Output forming section

[0187] 24 Output concave space

[0188] 25 Radial protrusion

[0189] 26 Stop

[0190] 27 Stop

[0191] 28 Driving Rib

[0192] 29 Drive accommodating part

[0193] 30 Locking protrusion

[0194] 31 Lock recess

[0195] 32 Locking protrusion

[0196] 33 Lock recess

[0197] 34 Marginal Area

[0198] 35 Base area

[0199] 36 Supplementary section

[0200] 37 Barb

[0201] 38 Barb

[0202] 38' Barb

[0203] 39 Annular flange

[0204] 40 Shoulder Section

[0205] 41 Overlapping section

[0206] 41' Overlap Section

[0207] 42 column segments

[0208] 43 Internal thread

[0209] 44 External thread

[0210] 45 Ribs

[0211] 46 Flange

[0212] 47 Side section

[0213] 48 Column periphery

[0214] 49 Welding flange

[0215] 50 Excess Material Department

[0216] 51 Anvil

[0217] 52 Ultrasonic generator

[0218] 53 original ring

[0219] 54 Pin

[0220] 55 slots

[0221] 56 Radial penetration

[0222] a Diameter

[0223] b Diameter

[0224] c arrow

[0225] d arrow

[0226] k Width

[0227] t distance

[0228] x Vertical center axis

[0229] E Parting plane

[0230] F-Plane

[0231] G-Plane

[0232] H Common plane

[0233] L Offset direction

[0234] M Vertical

[0235] V closure

Claims

1. A closure device (1) for a container (2) having a container opening (10), wherein: The closure device (1) comprises a cover element (3) for closing a container opening (10), a chamber (4) assigned to the cover element (3), and an inner shell (5), wherein the chamber (4) and the inner shell (5) have a closure part (V) and an opening part adapted to each other, which interact in such a way that a medium contained in the chamber (4) can escape into the container (2) due to the movement of the cover element (3) relative to the inner shell (5), and wherein the chamber (4) has a freely protruding closure edge which, in the use state, points to the interior of the container and which surrounds the central axis of the chamber (4) in an annular manner, and in the closed state, the closure edge together with the inner shell (5) has a closure effect, wherein the inner shell (5) forms a chamber bottom (14) which is bounded by the closure edge, and wherein the chamber (4) is locked with the inner shell (5), wherein the closure edge is in a manner similar to the maximum width of the chamber (4) in the deflection direction (L). (k), the first locking device (6) of the inner shell (5) is radially offset inwardly relative to the vertical center axis (x) of the closure device (1), characterized in that the first locking device (6) is constructed separately in the vertical direction (M) from a shoulder section (40) of the inner shell (5) constructed on the bottom side below the first locking device (6) and effectively connected to the container opening (10), wherein the chamber (4) is composed of an upper part (8) and a lower part (9) and has a parting plane (E), which extends perpendicular to the vertical center axis (x) of the closure device (1) and the parting plane (E) passes through the overlapping section (41) of the lower part (9) of the chamber (4), wherein the upper part (8) and the lower part (9) are welded to each other in the parting plane (E), wherein the welding is achieved by a supplementary section (36) connected to the upper part (8) and the lower part (9) and formed by injection molding.

2. The closure device according to claim 1, characterized in that The supplementary section (36) is designed to be annular.

3. The closure device according to claim 1, characterized in that The supplementary section (36) is convex radially outward in cross section and protrudes respectively beyond the outer boundaries of the upper part (8) and the lower part (9) facing the supplementary section.

4. The closure device according to claim 1, characterized in that The chamber (4) consists of an upper part (8) and a lower part (9) and has a parting plane (E), which extends perpendicularly to the vertical center axis (x) of the closure device (1) and passes through the overlapping section (41) of the lower part (9) of the chamber (4), and the upper part (8) and the lower part (9) are welded to each other in the parting plane (E), wherein the weld is covered by the upper part (8) to the outside, wherein the upper part (8) and the lower part (9) are also covered, wherein the upper part (8) and the lower part (9) of the chamber (4) are additionally plug-connected.

5. The closure device according to claim 1 or 4, characterized in that: The first latching device (6) is formed on a freely standing cylindrical section (42) of the inner housing (5).

6. The closure device according to claim 1, characterized in that The cover element (3) has an internal thread (43) for cooperating with an external thread (44) of the container (2), and the inner shell (5) has a sealing lip (13) spaced radially inward from the internal thread (43).

7. The closure device according to claim 6, characterized in that The sealing lip (13) is designed to overlap radially relative to the internal thread (43).

8. The closure device according to claim 1, characterized in that On two planes (F, G) separated from each other in a vertical direction (M) based on the usage state of the closure device (1), the chamber (4) is locked with the cover element (3) and the inner shell (5) by means of locking protrusions (30, 32) and locking recesses (31, 33) on the chamber (4), the cover element (3) and the inner shell (5), wherein a first locking device (6) with the inner shell (5) is radially offset inwardly relative to a second locking device (7) with the cover element (3) based on the vertical center axis (x) of the closure device (1), wherein the locking protrusions (30, 32) and the locking recesses (31, 33) of the two planes (F, G) extend without overlapping each other when projected into a common plane (H) transverse to the vertical center axis (x).

9. The closure device according to claim 1, characterized in that On two planes (F, G) separated from each other in a vertical direction (M) based on the usage state of the closure device (1), the chamber (4) is locked with the cover element (3) and the inner shell (5) by means of locking protrusions (30, 32) and locking recesses (31, 33) on the chamber (4), the cover element (3) and the inner shell (5), wherein a first locking device (6) with the inner shell (5) is radially offset inwardly relative to a second locking device (7) with the cover element (3) based on the vertical center axis (x) of the closure device (1), wherein the locking protrusions (30, 32) and the locking recesses (31, 33) of the two planes (F, G) extend without overlapping each other when projected into a common plane (H) transverse to the vertical center axis (x), wherein the locking protrusions (30, 32) are constructed on a lower part (9) in the vertical direction.

10. The closure device according to claim 1, characterized in that On two planes (F, G) separated from each other in a vertical direction (M) based on the usage state of the closure device (1), the chamber (4) is locked with the cover element (3) and the inner shell (5) by means of locking protrusions (30, 32) and locking recesses (31, 33) on the chamber (4), the cover element (3) and the inner shell (5), wherein a first locking device (6) with the inner shell (5) is radially offset inwardly relative to a second locking device (7) with the cover element (3) based on the vertical center axis (x) of the closure device (1), wherein the locking protrusions (30, 32) and the locking recesses (31, 33) of the two planes (F, G) extend without overlapping each other when projected into a common plane (H) transverse to the vertical center axis (x), wherein the upper part (8) and the lower part (9) are made of hard plastic.

11. The closure device according to claim 10, characterized in that: The upper member (8) and the lower member (9) contain polybutylene terephthalate.

12. The closure device according to any one of claims 1 to 3, characterized in that Based on a vertical section represented as a line perpendicular to the center axis (x), the supplementary section (36) is designed with barbs (37, 38).

13. The closure device according to claim 1, characterized in that Based on a vertical section represented as a line with the vertical center axis (x), the supplementary section (36) is formed substantially in the shape of a triangle or a trapezoid.

14. The closure device according to claim 1, characterized in that The supplementary section (36) clamps the upper part (8) and the lower part (9) together in the vertical direction.

15. The closure device according to claim 1, characterized in that A circumferential wedge-shaped surface, which is located on the outside in cross section, is cut out in the edge region (34) of the upper part (8) to accommodate a supplementary section (36) produced by overmolding this region.

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