Closure unit for connection to a drinking bottle or cup, especially a thermal mug

Abstract

Closure unit (100; 100') for connection with a drinking bottle (200') or with a cup (200), in particular a thermal cup, with at least one pouring element (10; 10') with a pouring rim (12; 12') which surrounds at least one pouring opening (15; 15'), wherein the pouring opening (15; 15') can be closed via a sealing element (51; 51'), where - that a base element (20; 20') separate from the pouring element (10; 10') is provided with at least one pouring opening (25; 25') which is to be firmly connected to the drinking bottle (200) or the cup (200'); - that the spout element (10; 10') is guided vertically movable in or on the base element (20; 20'), wherein the spout element (10; 10') can be lifted from the base element (20; 20') via a spring element (52; 52'); - that the sealing element (51; 51') closes at least one of the pouring openings (15; 15'; 25; 25') when the pouring element (10; 10') is lowered onto the base element (20; 20'); and - that a locking device is provided with which the spout element (10; 10') can be locked against the force of the spring element (52; 52') in the lowered position relative to the base element (20; 20'), characterized by - that a sealing tunnel (53; 53') is formed between the base element (20; 20') and the spout element (10; 10'), which surrounds the sealing element (51; 51'), the spout opening (25; 25') of the base element (20; 20') and the spout opening (15; 15') of the spout element (10; 10'); - that the spring element (52; 52') is formed by a tubular section made of an elastomer, and - that the sealing tunnel (53; 53') is formed within the spring element (52; 52').

Description

[0001] The invention relates to a closure unit for connection with a drinking bottle or with a cup, in particular a thermal cup, having the features of the preamble of claim 1.

[0002] German patent application DE 20 2017 100 771 U1 discloses a drinking bottle closure for an insulated container for hot beverages. German patent application DE 10 2019 128 302 B3 describes a drinking bottle closure for a drinking bottle with a narrow neck. Both solutions share the characteristic of offering a high degree of leak-proof sealing, as they incorporate two independent sealing levels. This ensures not only a high level of leak-proofness when the container is tilted, but also a high level of sealing with carbonated beverages, which can generate high internal pressure. Furthermore, the leakage of residual liquid after closing the closure is prevented. The only disadvantage of these sophisticated drinking bottle closures is that they require two hands to operate and / or a significant amount of force to press the release button.The operating button for opening or closing the water bottle cap must always be pressed directly against the spring force of a spring. This spring force must be high enough to ensure sufficient pressure of the sealing elements against their contact surfaces and maintain a seal in all positions. Therefore, one-handed operation is only possible for those who can hold the water bottle by the cap and simultaneously press the operating button.

[0003] A generic closure unit is known from WO 2014 / 181337A2. This closure unit is ergonomically advantageous because the spout extends upwards and is therefore easily accessible when drinking. However, the spout is more of a drinking spout that must be enclosed by the lips, rather than a spout with a rim that allows the lips to simply be placed against it for drinking. Furthermore, the base element and spout are only sealed against each other in the upper, extended position of the spout. In the lowered position, a lid is connected to the base element. The drinking spout is held in between, and residual liquid can accumulate in the space under the lid. Therefore, contamination can occur if a drinking bottle fitted with this closure unit is transported lying down in a bag after use.Furthermore, beverage residue can remain in the cavity between the cap and the base element, which is not rinsed out even during subsequent use, potentially causing hygiene problems.

[0004] The object of the invention is therefore to provide a closure unit for connection with a drinking bottle or cup that allows for easy one-handed operation.

[0005] This problem is solved by a closure unit having the features of claim 1.

[0006] As is common with known closure units for insulated bottles, insulated mugs and drinking bottles for mobile beverage transport, a pouring element with a pouring rim is provided, which surrounds at least one pouring opening, the pouring opening being sealable via a sealing element.

[0007] However, in the closure element according to the invention, the spout element is not directly connected to the drinking bottle or cup. Instead, an additional base element is provided, which is positioned between the drinking bottle or cup and firmly connected to it. The spout element is movably mounted and guided in the base element, so that it can be displaced along or parallel to the central axis of the closure unit and thus lifted off the base element. At least one spring element is provided to lift the spout element off the base element.

[0008] According to the invention, one-handed operation of the locking unit is facilitated by the provision of a pivoting cover that acts against the high spring force required to create a seal, as is also the case with the locking unit according to the invention. However, pivoting can be conveniently accomplished by placing one or more fingers on the top of the cover, which is easier than pressing down a central actuating button axially, especially when simultaneously holding the locking unit with the same hand.

[0009] During the opening movement, the cover slides on the edge of the spring-loaded spout element. Only the sliding friction force needs to be overcome. During the closing movement, the cover again slides onto the edge of the spring-loaded spout element. In this case, in addition to overcoming the sliding friction force, the spring element must also be pre-tensioned. Because the pivotally mounted cover rotates over a large radius, and the increasing spring tension during closing is maintained in every intermediate position by the cover being rigidly mounted to the base element, the one-handed closing movement requires less force compared to a conventional locking unit with a central operating button.

[0010] The spout is sealed by pressing the movable spout element onto the base element, thereby pressing at least one sealing element on either the spout element or the base element against at least one spout on the other element. When the spout element is lifted again by spring force, the seal is released.

[0011] The sealing element can be fixedly arranged in the base element, so that in the case of a spout element lowered onto the base element, the spout opening of the spout element is closed.

[0012] Alternatively, the sealing element can be fixedly arranged in the spout element, so that when the spout element is lowered onto the base element, the spout opening on the base element is closed.

[0013] The user must close the cover and press the spout against the force of the inserted spring element to position it against the base element. This pre-tensions the spring element, so that the spout automatically lifts off the base element when the cover is later swung away and no force is applied.

[0014] Therefore, a locking device is also provided to hold the spout element in the lowered position relative to the base element against the force of the pre-tensioned spring element. Preferably, the locking device is formed by the cover, which simultaneously covers the upwardly open area of ​​the spout element and thus protects it from contamination.

[0015] A particular advantage of the invention lies in a spring element that is designed in the form of a hose section and consists of an elastomeric plastic, in particular silicone. This allows several advantages to be achieved simultaneously: - The silicone spring element stores sufficient spring energy in the compressed state to later lift the spout element off the base element again, even if spot adhesion occurs due to beverage residue. - It is food-safe and can come into direct contact with the beverage liquid.

[0016] In particular, such a spring element, positioned between the base element and the spout element, also forms a sealing tunnel that surrounds the sealing element, the spout opening of the base element, and the spout opening of the spout element. The ends of the spring element connect to the underside of the spout element and the top of the base element, so that a completely sealed space is formed within the sealing element as soon as the sealing element is in contact with the spout opening.

[0017] It is also possible to manufacture the sealing element intended for closing the pouring opening and an elastomeric spring element in one piece, for example by providing an outer wall that stores the spring force when the spout and base element approach each other, and a central sealing element for closing the pouring opening that is connected to the outer wall via radial spokes.

[0018] It is also conceivable to provide only one central sealing element for closing the pouring opening, which is compressible in itself and can therefore also act as a spring element.

[0019] In a first embodiment, the cover comprises only a lid element, which is connected to the base element via pivot axes. It can be pivoted to the side, causing the spring element to expand and the spout element to be raised, thereby releasing the spout opening.

[0020] To enable pivoting, the contours of the upper edges on the base element and the spout element are adapted to the pivoting path sloping from top to bottom and slope down towards the side to which the lid element pivots.

[0021] Alternatively, the cover can include a bracket that is pivotally mounted on the base element, and a lid element that is itself movably mounted on the bracket. To hold the lid element on top of the closure unit and to prevent the bracket from pivoting unintentionally, the lid element can have an actuation button with at least one cam on its underside, which is positively locked against the inner edge of the spout rim when the closure unit is in a closed position.

[0022] It is also advantageous to guide the movement of the spout element within the base element. For this purpose, at least one inlet spout is provided, which surrounds the spout opening of the spout element and connects to the underside of the spout element. Furthermore, it extends through the sealing tunnel, if present, and through the at least one spout opening of the base element to the area of ​​the neck of the drinking bottle or cup.

[0023] In particular, it is provided that the inlet nozzle is formed from several segments, each of which extends through a partial area of ​​the pouring opening of the base element.

[0024] It is also advantageous to provide at least one of the segments with a removable positive-locking connection between it and the base element, thereby limiting the displacement of the spout element. This can be achieved by having at least one segment resiliently connected to the spout element and by having at least one projection formed on the segment, which engages positively in a recess or under a projection on the base element.

[0025] Furthermore, the inlet nozzle may be provided with several pairs of ribs on its inner wall, at least at two diametrically opposed positions, between which a fluid-conducting chamber is formed. The ribs extend radially inwards to the outer circumference of the sealing element, so that each chamber is open towards the center. This allows liquid to flow through one chamber and air through another when drinking, ensuring a uniform flow of liquid and preventing a sudden, gushing outflow.

[0026] In the case of a cup with a larger cross-sectional area covered by the base element, it is advantageous to design a vent with a ventilation opening away from the pouring opening and to attach a vent closure element to the underside of the pouring element. The vent opening in the base element is automatically closed when the pouring element is lowered onto the base element.

[0027] The invention is explained in more detail below with reference to the embodiments shown in the drawings. Unless otherwise indicated, the figures show a perspective sectional view of the following: Fig. 1 a thermal mug with a closed closure unit according to a first embodiment, in perspective view; Fig. 2. The thermal mug with a closed locking unit in perspective view; Fig. 3 a perspective exploded view of the thermos mug with the locking unit; Fig. 4 parts of the locking unit before assembly; Fig. 5 the fully assembled, closed thermal mug with the locking unit; Fig. 6 the opening process of the locking unit; Fig. 7 the opened closure unit with the beverage container; Fig. 8. Disassemble the locking unit for cleaning purposes; Fig. 9 Another embodiment of a closure unit with a drinking bottle in the closed position, in perspective view; Fig. 10 the combination of drinking bottle and closure unit in open position, in perspective view; Fig. 11 parts of the locking unit according to the Fig. 9 and Fig. 10; Fig. 12 a fully assembled locking unit in the closed position; Fig. 13 the locking unit at the beginning of the opening; Fig. 14 the fully opened locking unit; Fig. 15 the removal of the spout element from the base element; Fig. 16 the spout element from below; Fig. 17 the basic element from below and Fig. 18 the locking unit taken from the base element. Fig. Figure 1 shows a sealable thermal mug, consisting of an insulated, cup-shaped beverage container 200 and a closure unit 100 screwed onto it, in a perspective view. The closure unit 100 comprises a base element 20, which is directly connected to the beverage container 200, and a pivotable cover 30, which is pivotally connected to the base element 20 via pivot axes 31.

[0028] Fig. Figure 2 shows a further perspective view of the beverage container consisting of beverage container 200 and closure unit 100. The cover 30 is pivoted downwards about the pivot axes 31.

[0029] By pivoting the cover 30, a spout element 10 which is spring-mounted inside the base element 20 is no longer held in a form-fitting manner, so that it has been pushed vertically upwards due to the force of a spring acting between the base element 20 and the spout element 10.

[0030] As in Fig. As can also be seen in Figure 2, a special contour of a spout rim 12 is provided on the spout element 10. On the side facing away from the cover 30, the upper edge of the spout rim 12 runs in a horizontal plane to which the central axis is normal. In contrast, the upper edge of the spout rim 12 slopes down on the side facing the cover 30 and follows the pivot path of the cover 30. This allows the cover 30 to slide down on the spout rim 12 when it is subsequently closed, thereby pressing the spout element 10 deeper into the base element 20 against the force of the internal spring element.

[0031] If the cover is 30 in the Fig. In the closed position shown in Figure 1, the spring-loaded spout element 10 is also held in its lowered position. The cover 30 therefore forms a locking device.

[0032] Fig. Figure 3 is a perspective exploded view of the beverage container 200 with closure unit 100. The pouring element 10 with its pouring rim 12 is visible in the upper area. It has a downward-projecting inlet nozzle 11. The base element 20 has a rib 22 with an upper edge whose contour is analogous to the contour of the upper edge of the pouring rim 12 on the pouring element 10, so that both together form a uniform rim when the pouring element 10 is lowered into the base element 20.

[0033] The base element 20 has bearings 21 for the pivot axes of the cover 30. A bottle neck seal 55 is inserted between the neck 210 of the beverage container 200 and the base element 20 to seal the connection between them.

[0034] A mushroom-shaped sealing element 51 is fixedly positioned in the base element 20 and serves to seal a pouring opening in the pouring element 10. The sealing element 51 is made of an elastomeric material.

[0035] Furthermore, a spring element 52 is provided, which is also made of an elastomeric material, in particular silicone, and which has the form of a short hose section. A sealing tunnel is formed within the spring element 52, through which the inlet nozzle 11 of the base element is guided. In addition, the spring element 52 is axially compressible in the direction of its central axis, so that an elastic deformation occurs which makes it possible to raise the spout element 10 vertically relative to the base element 20 as soon as the cover 30 has been pivoted laterally.

[0036] Another elastomeric component is a vent closure element 16, which is attached to the underside of the spout element 10 and closes a vent opening in the base element 20 (not visible here) when the spout element 10 is lowered onto the base element 20.

[0037] Fig. Figure 4 shows the parts before assembly in a perspective sectional view. The base element 20 has a largely cylindrical outer contour with an upwardly projecting cylindrical web 22 and a cover section 23 inserted approximately halfway up the web, which closes the cross-section within the web 22. The inner diameter of the web 22 projecting upwards above the cover section 23 is matched to the outer diameter of the spout element 10.

[0038] A sealing element holder 24 is integrally formed in the lid area 23, in which the sealing element 51 is held. The sealing element holder 24 has spokes or a transversely extending support bridge to hold the sealing element 51 in the center, the spokes or the support bridge extending over a pouring opening without completely closing it.

[0039] In its lower section, the base element 20 has a threaded section 29 with an internal thread, via which it is screwed onto the neck section 201 of the beverage container 200. The neck seal 55 is compressed between the base element 20 and the upper edge of the neck section 201, thus sealing the connection.

[0040] The spring element 52 is visible on the base element 20. This spring element forms a sealing tunnel 53 within its interior, through which the inlet nozzle 11 extends. At the upper end of the inlet nozzle 11 is a discharge chamber 14, the cross-section of which is larger than that of a pouring opening 15. In addition to the circumferential pouring rim 12, the pouring element 10 also has a cover section 13 that covers the cross-section within the pouring rim 12. A receptacle for the vent closure element 16 is provided on the underside of the cover section 13. This closure element presses down onto a vent nozzle 26 on the base element 20, which has an internal vent opening.

[0041] Fig. Figure 5, also in a perspective sectional view, shows the fully assembled, closed beverage container 200 with closure unit 100. The closure unit 100 is screwed onto the beverage container 200. The spout element 10 is in a lowered position relative to the base element 20. This compresses the spring element 52, and the vent closure element 16 rests on the vent nozzle 26. The sealing element 51 presses with its mushroom head 51.1 at the top into the pouring chamber 14 on the spout element 10.

[0042] The cover 30 complements the outer contour of the closure unit 100 defined by the bridge 22 and covers the open area of ​​the spout element 10 on the top side.

[0043] The inlet nozzle 11 consists of several segments that extend through the pouring openings in the lid area of ​​the base element 10 into the beverage container 200.

[0044] Fig. Figure 6 shows the opening process of the closure unit 100. A user applies a force perpendicular to the central axis to the cover 30 with their thumb 1, causing it to lift off the upper edge of the bridge 22 and the spout rim 12. Due to its connection to the base element 10 at the pivot bearing, the cover 30 pivots to the side. As the cover 30 pivots away, the spout element 10 is no longer fixed to the base element 20 and is moved upwards by the spring energy stored in the spring element 52 during the previous compression, as soon as the spring element 52 can expand again. When the spout element 10 is moved upwards, the contact between the mushroom head of the sealing element 51 and the pouring chamber 14 is also broken, thus releasing the pouring opening 15. At the same time, the vent closure element 16 lifts off the vent nozzle 26.

[0045] Fig. Figure 7 shows a perspective sectional view through the open closure unit 100 with the beverage container 200. The spring element 52 is fully extended, and the spout element 10 is raised to its maximum height relative to the base element 20. The lines marked with arrows on the left indicate the flow from the beverage container 200 into the inlet nozzle 11. The flow occurs through spouts located around the sealing element 51 in the lid area 23 of the base element 20, and finally through the spout chamber 14 and the spout opening 15 into the upper area of ​​the spout element 10, which is defined by the spout rim 12.

[0046] Fig. Figure 8 shows how the base element 20 and the spout element 10 can be separated for cleaning purposes. For this purpose, the inlet nozzle 11, which consists of several segments, is radially compressed, thereby releasing the positive locking of the inlet nozzle 11 in the base element 20, so that the spout element 10 can be pulled off upwards.

[0047] The cover 30 is designed so that, in its lowered position, it does not impede the removal of the spout element 10 from the base element 20.

[0048] Fig. Figure 9 shows a further embodiment of a closure unit 100', designed for a slim drinking bottle 200', in a perspective view. The closure unit 100' comprises a base element 20', which is directly connected to the drinking bottle 200', and a cover 30'. The cover 30' has a bracket 33', which is pivotally connected to the base element 20' via pivot axes 31', and a lid element 32', which in turn is pivotally connected to the bracket 33'. A release button 34' is integrated into the lid element 32'.

[0049] Fig. Figure 10 shows a further perspective view of the combination of the drinking bottle 200' and the closure unit 100' in the open position. The bail 33' is pivoted downwards about the pivot axes 31', which moves the lid element 32' away from the top of the base element 20'. As a result, a spout element 10', which is spring-mounted within the base element 20', is no longer held in a form-fitting manner, so that it has been pushed vertically upwards by the force of a spring acting between the base element 20' and the spout element 10'. The area surrounded by a spout rim 12' is now exposed. A pouring opening 15' is open within this opening. A sealing element 51' is visible in this opening.

[0050] Fig. Figure 11 shows parts of the alternative closure unit 100' for the slim drinking bottle 200'. The closure unit 100' comprises a base element 20' and a cover 30', which is pivotally attached to a bearing axis 31'. The closure unit 100' also includes a spout element, which is not shown here.

[0051] The base element 20' has a threaded section 29' in its lower section for connection to the slim neck of the drinking bottle. The base element 20' tapers upwards from the threaded section 29' to a spout 25'. A support bridge 27' holds a sealing element holder 24' for attaching the sealing element 51' in the center of a pouring opening 25'. The sealing element 51' has a mushroom-shaped head 51.1' on its upper surface and a circumferentially widened collar 51.2' on the underside of its shaft.

[0052] In the illustrated example of the closure unit 100', a cover area 23' between a spout rim 22' and the spout opening 25' is very narrow and consists of a groove which serves to accommodate a cylindrical spring element.

[0053] Fig. Figure 12 shows the fully assembled closure unit 100' in the closed position. The upper section of the drinking bottle 200' with the bottle neck 201' is visible in the lower area. The base element 20' is screwed onto the bottle neck 201' with its threaded section 29'. A bottle neck seal 55' inserted between the two elements provides a seal.

[0054] A cover 30' is fitted to the upper part of the closure unit 100' and covers the area of ​​the spout element 10' enclosed by the spout rim 12'. The lid element 32' of the cover 30' is mounted on the bracket 33', which in turn is pivotally mounted on the base element 20', as already described above. Fig. 11 was described.

[0055] The cover 30' has an actuating button 34' which has a cam 35' on its underside. This cam bears against the inner edge of the spout rim 12' and is thus positively locked in place. Pivoting of the lever 33' is not possible in the position shown, because the cover element 32' presses against the upper edge of the bridge 22' when pivoting to the left, and because, in the opposite direction, the cam 35' rests against the spout rim 12'.

[0056] The sealing element 51' is inserted into the sealing element holder 24'. A spout element 10' is inserted into the space within the web 22' of the base element 20'. This, together with the spout rim 12', encloses an upwardly open space, at the bottom of which is a discharge opening that is located in the Fig. The position shown in Figure 10 is closed by the mushroom head 51.1' of the sealing element 51'.

[0057] An elastomeric spring element 52' made of silicone, shaped like a hose section, is inserted between the base element 20' and the spout element 10'. Inside, it forms a sealing tunnel 53' that surrounds the area of ​​the spout opening in the base element 20' and the inlet nozzle 11' of the spout element 10, thereby sealing the entire space between the base element 20' and the spout element 10' in a liquid-tight manner. For this purpose, both the upper and lower edges of the spring element 52 are tightly pressed into annular grooves in the base element 20' and the spout element 10', respectively.

[0058] The inlet nozzle 11' extends through those areas of a pouring opening in the base element 20' that are not blocked by the support bridge 27' for the sealing element 51. To bypass the support bridge 27', the inlet nozzle 11' is divided into several segments, one or more of which extend through a section of the pouring opening.

[0059] Fig. Figure 17 shows the base element 20' from the underside. The outlet opening 25' is divided into two parts by the support bridge 27' and the sealing element holder 24'.

[0060] Fig. Figure 16 shows the spout element 10' from below. The outlet opening 15' is located in the center of the base element 10'. The inlet nozzle 11' consists of two segments 11.2' and 11.3', with a gap on either side between them to accommodate the support bridge of the base element. While segment 11.2' is rigidly connected to the base element 10', the other segment 11.3' is resiliently attached to the base element, allowing it to be pressed inwards towards the center. Webs 11.1' on the inside of segments 11.2' and 11.3' extend radially inwards to such an extent that the mushroom head of the sealing element can be positioned in the center. A chamber 11.4' is formed between each pair of webs 11.1'. This chamber allows liquid or air to pass over the mushroom head. Because of the fact that several chambers 11.With 4' formed, particularly at at least two diametrically opposed positions, outgoing liquid and incoming air can be guided in separate flow paths. The typical gurgling sound that occurs when drinking from bottles with a narrow neck is avoided with the 100' closure unit.

[0061] In Fig. Figure 13 shows the beginning of the opening of the closure unit 100'. This is initiated by pressing the button 34' downwards. This disengages the cam 35' from the spout rim 12' and thus unlocks the locking mechanism formed by the cover. The lever 33' can now be pivoted in the direction indicated by the arrow.

[0062] In Fig. Figure 14 shows the fully opened closure unit 100'. The lever 33' is pivoted downwards to its maximum extent, which simultaneously moves the cover element 32' into a position laterally against the base element 20'. By pivoting the cover, the spring element 52 can expand, thereby moving the spout element 10' vertically upwards, resulting in an increased distance between the spout element 10' and the base element 20'. The movement of the spout element 10' moves the central sealing element 51' with its mushroom head 51.1' away from the spout opening 15', thus opening it.

[0063] Within the spring element 52', a sealing tunnel 53' is formed, which completely seals the area bounded above and below by the base element 20' and the spout element 10'. The inlet nozzle 11' passes through the sealing tunnel 53'.

[0064] Fig. Figure 15 shows how the spout element 10' can be removed vertically upwards. The segments 11.2' and 11.3' of the inlet nozzle are pressed against each other. A projection 11.5' is formed on segment 11.3', which engages under the cover area 23'. As soon as the projection 11.5' springs back, the positive locking is released and the spout element 10' can be pulled out of the base element 20'.

[0065] In the representation in Fig. 18 is the spout element 10' together with the silicone hose, which serves as spring element 52' and forms the sealing tunnel, taken from the base element 20'. Reference symbol: 100; 100' locking unit 10; 10' Pouring element 11; 11' Inlet nozzle 11.1; 11.1' Bridge 11.2; 11.2' Segment 11.3; 11.3' Segment 11.4; 11.4' Chamber 11.5' Nose 12; 12' Pouring rim 13 Cover area 14 Pouring chamber 15; 15' Pouring opening 16 Ventilation closure element 20; 20' Base element 21 warehouses 22; 22' Bridge 23; 23' Cover area 24; 24' Sealing element holder 25; 25' Pouring opening 26 ventilation nozzles 27; 27' Support bridge 29; 29' Thread section 30; 30' cover 31; 31' Swivel axes 32' Cover element 33' stirrups 34' Taste 35' cams 51; 51' Sealing element 51.1; 51.1' Mushroom head 51.2' Bund 52; 52' Spring element 53; 53' Closed tunnel 55 Neck seal 55' Bottle neck seal 200' Water bottle 201' Bottleneck 200 cups 201 Neck section

Claims

[1] Closure unit (100; 100') for connection with a drinking bottle (200') or with a cup (200), in particular a thermal cup, with at least one pouring element (10; 10') having a pouring rim (12; 12') which surrounds at least one pouring opening (15; 15'), wherein the pouring opening (15; 15') can be closed via a sealing element (51; 51'), where - that a base element (20; 20') separate from the pouring element (10; 10') is provided with at least one pouring opening (25; 25') which is to be firmly connected to the drinking bottle (200) or the cup (200'); - that the spout element (10; 10') is guided vertically movable in or on the base element (20; 20'), wherein the spout element (10; 10') can be lifted from the base element (20; 20') via a spring element (52; 52'); - that the sealing element (51; 51') closes at least one of the pouring openings (15; 15'; 25; 25') when the pouring element (10; 10') is lowered onto the base element (20; 20'); and - that a locking device is provided with which the spout element (10; 10') can be locked against the force of the spring element (52; 52') in the lowered position relative to the base element (20; 20'), characterized by , - that a sealing tunnel (53; 53') is formed between the base element (20; 20') and the spout element (10; 10'), which surrounds the sealing element (51; 51'), the spout opening (25; 25') of the base element (20; 20') and the spout opening (15; 15') of the spout element (10; 10'); - that the spring element (52; 52') is formed by a tubular section made of an elastomer, and - that the sealing tunnel (53; 53') is formed within the spring element (52; 52'). [2] Locking unit (100; 100') according to claim 1, characterized by , that the sealing element (51; 51') is firmly arranged in the base element (20; 20') and that when the spout element (10; 10') is lowered onto the base element (20; 20') the spout opening (15; 15') on the spout element (10; 10') is closed. [3] Locking unit (100; 100') according to claim 1, characterized by , that the sealing element (51; 51') is firmly arranged in the spout element (10; 10') and that when the spout element (10; 10') is lowered onto the base element (20; 20') the spout opening (25; 25') on the base element (20; 20') is closed. [4] Locking unit (100; 100') according to any one of the preceding claims, characterized by , that the base element (20; 20') has at least one upwardly projecting web (22; 22') on its outer circumference, in which the outer circumference of the vertically displaceable spout element (10; 10') is guided in a form-fitting manner. [5] Locking unit (100; 100') according to any one of the preceding claims, characterized by , that at least one inlet nozzle (11; 11') is provided, which: - surrounds the pouring opening (15) of the pouring element (10; 10'), - connects to the underside of the spout element (10; 10') and - extends through the sealing tunnel (53; 53') and the at least one pouring opening (25; 25') of the base element (20; 20'). [6] Locking unit (100; 100') according to claim 5, characterized by , that the inlet nozzle (11; 11') is formed from several segments (11.2', 11.3') of which each extends through a region of the pouring opening (25; 25') of the base element (20; 20'). [7] Locking unit (100; 100') according to claim 6, characterized by, that at least one segment (11.2', 11.3') is resiliently connected to the spout element (10; 10') and that at least one projection (11.5') is formed on the segment (11.2', 11.3') which engages in a recess in or under a recess on the base element (20; 20'). [8] Locking unit (100') according to one of claims 5 to 7, characterized by , that the inlet nozzle (11') has on its inner wall at at least two diametrically opposed positions a pair of webs (11.1') each, between which a fluid-conducting, inwardly open chamber (11.4') is formed, wherein the webs (11.1') extend radially inwards to the outer circumference of the sealing element (51'). [9] Locking unit (100; 100') according to any one of the preceding claims, characterized by , that the sealing element (51; 51') has a mushroom head (51.1; 51.1') on the upper side and a circumferentially widened collar (51.2) on the underside of its shaft. [10] Locking unit (100) according to any one of the preceding claims, characterized by , that a cover (30) is provided which is pivotably connected to the base element (20) on pivot axes (31), and that the upper edge of the spout rim (12) on the spout element (10) and the upper edge of a web (22) on the base element (20) are adapted to the pivot path of the cover (30) and slope downwards to the side. [11] Locking unit (100) according to claim 10, characterized by , that a vent closure element (16) is attached to the underside of the spout element (10), which closes a vent opening in the base element (20) when the spout element (10) is lowered onto the base element (20). [12] Locking unit (100') according to any one of the preceding claims, characterized by , that the cover (30') comprises a bracket (33') which is pivotably mounted on the base element (20'), and a lid element (32') which is movably mounted on the bracket (33'). [13] Locking unit (100') according to claim 12, characterized by , that the lid element (32') has an actuating button (34') with a cam (35') on the underside, which is positively locked to the inner edge of the spout rim (12') in a closed position of the closure unit (100').

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