CLOSURE ASSEMBLY FOR A BEVERAGE CONTAINER AND METHOD FOR REPEATABLY CLOSING A BEVERAGE CONTAINER BY MEANS OF A CLOSURE ASSEMBLY

Abstract

The invention relates to a closure assembly (1) for a beverage container (2), at least comprising:—a lid element (3) having an opening (4); and—a closure element (5) for repeatably closing the opening (4), the closure element being disposed on the lid element (3); wherein the lid element (3) has an outside (6) and an inside (7), and the opening (4) has an opening edge (8) and an opening plane (9) formed by the opening edge (8); wherein the closure element (5) has at least a base part (10), a tab (11) and a lever element (12); wherein the base part (10) comprises a frame part (13), which is disposed on the opening edge (8) and has a window (14), and a flap (15), which is pivotably connected to the frame part (13) in order to close the window (14) and thus the opening (4); wherein the tab (11) is pivotably connected to the frame part (13) by means of a first axis of rotation (16); and wherein the lever element (12) is connected to the tab (11) by means of a second axis of rotation (17) and to the flap (15) by means of a third axis of rotation (18). The invention also relates to a method for repeatably closing an opening (4) of a beverage container (2) by means of a closure assembly (1).

Claims

1. A closure assembly for a beverage container comprising: a lid with an opening; and a closure which is arranged on the lid and which serves for repeatably closing the opening, wherein the lid includes an outer side and an inner side, and the opening includes an opening edge and an opening plane formed by the opening edge, wherein the closure includes at least a base, a tab and a lever, wherein the base includes a frame, which is arranged on the opening edge and which includes a window, and a flap, which is pivotably connected to the frame for the purpose of closing the window and thus the opening, wherein the tab is pivotably connected via a first axis of rotation to the frame, and wherein the lever is connected via a second axis of rotation to the tab and via a third axis of rotation to the flap.

2. The closure assembly of claim 1, wherein the first axis of rotation and the second axis of rotation are arranged parallel and with a spacing to one another.

3. The closure assembly of claim 1, wherein the tab is pivotable from a non-pivoted initial position in a first pivoting movement about the first axis of rotation and, as a result of this first pivoting movement, the flap is pivotable relative to the frame.

4. The closure assembly of claim 1, wherein the tab, the base and the lever interact in the manner of a toggle lever, such that a first pivoting movement of the tab about the first axis of rotation by a first angular extent causes a second pivoting movement of the flap relative to the opening plane, and a further first pivoting movement of the tab by a further first angular extent causes a third pivoting movement of the flap, and wherein the second pivoting movement and the third pivoting movement are of a different magnitude.

5. The closure assembly of claim 4, wherein, proceeding from a non-pivoted initial position, the first pivoting movement of the tab by at least 45 angular degrees causes the second pivoting movement of at most 5 angular degrees.

6. The closure assembly of claim 5, wherein, proceeding from the non-pivoted initial position, the first pivoting movement of the tab by at most 150 angular degrees causes the second pivoting movement of at least 30 angular degrees.

7. The closure assembly of claim 1, wherein the flap is connected to the frame via a hinge or via a fourth axis of rotation.

8. The closure assembly of claim 1, wherein the frame is arranged captively on the opening edge.

9. The closure assembly of claim 1, wherein the closure allows repeatable gas-tight closure of the opening.

10. The closure assembly of claim 1, further comprising a first gasket arranged between the inner side and a contact surface of the frame wherein the first gasket encircles the opening.

11. The closure assembly of claim 10, further comprising a second gasket arranged between the frame and the flap, wherein the second gasket encircles the window.

12. The closure assembly of claim 1, wherein the tab is connected, only in a non-pivoted initial position, via a seal element to the base, and wherein the connection via the seal element is destroyed when a first pivoting movement of the tab is performed for the first time.

13. The closure assembly of claim 1, wherein the base includes a ventilation passage wherein, upon a first pivoting movement of the tab, a fluidic connection is formed between the inner side and the outer side through the ventilation passage, and wherein the first pivoting movement of the tab causes a deformation of the ventilation passage.

14. The closure assembly of claim 1, wherein, in a non-pivoted initial position of the tab, the flap forms a fluid-tight connection with the frame, wherein, upon a first pivoting movement of the tab, the fluid-tight connection is configured to be eliminated as a result of a second pivoting movement of the flap relative to the opening plane, and wherein a fluidic connection of the inner side to the outer side occurs exclusively as a result of the elimination of the fluid-tight connection.

15. The closure assembly of claim 3, wherein a force required for the first pivoting movement of the tab is at most 20 newtons.

16. The closure assembly of claim 1, wherein the tab assumes a self-locking position in each case in a non-pivoted initial position and in the region of a maximally pivoted end position.

17. The closure assembly of claim 1, wherein the tab, in a non-pivoted initial position, is arranged so as to be protected with respect to surroundings by a protective flap.

18. The closure assembly of claim 17, wherein the protective flap is pivotably connected via a fourth axis of rotation to the tab.

19. (canceled)

20. A method for repeatably closing an opening of the beverage container of claim 1, the method comprising: pivoting the tab about the first axis of rotation by a first angular extent in a first pivoting movement, wherein the flap is thus pivoted relative to the opening plane through a second pivoting movement; and performing a further first pivoting movement of the tab by a further first angular extent, wherein the flap is thus pivoted relative to the opening plane through a third pivoting movement, wherein the second pivoting movement and the third pivoting movement are of a different magnitude.

21. The method of claim 20, wherein the base includes a ventilation passage, wherein, upon the first pivoting movement of the tab out of a non-pivoted initial position in which the window is closed by the flap, a fluidic connection is formed between the inner side and the outer side through the ventilation passage, and pressure equalization between the beverage container and surroundings is thus realized, and wherein the first pivoting movement of the tab causes a deformation of the ventilation passage.

22. The method of claim 20, wherein, in a non-pivoted initial position of the tab in which the window is closed by the flap, the flap forms a fluid-tight connection with the frame, wherein, upon the first pivoting movement of the tab, the fluid-tight connection is eliminated as a result of the second pivoting movement of the flap, and wherein pressure equalization between a content of the beverage container and surroundings is performed exclusively as a result of the elimination of the fluid-tight.

Description

[0100] FIG. 1 shows a lid element 3 in a perspective view. The lid element 3 has an outer side 6 and an inner side 7 and an opening 4. The opening 4 has an opening edge 8 and an opening plane 9 formed by the opening edge 8. The lid element 3 is connected or connectable to the beverage container 2. The lid element 3 is non-separately connected to (only destructively separable from) the beverage container 2. The inner side 7 of the lid element 3 forms that side of the lid element 3 which faces toward the content of the beverage container 2, with the outer side 6 of the lid element 3 forming that side of the lid element 3 which faces away from the content and toward surroundings 31. The opening 4 of the lid element 3 is the sole pouring opening for a content of the beverage container 2.

[0101] FIG. 2 shows a closure element 5 in an exploded illustration in a perspective view. FIG. 3 shows a closure assembly 1 in a side view in section. FIG. 4 shows a base part 10 of the closure element 5 as per FIG. 3. FIGS. 2 to 4 will be described jointly below. Reference is made to the statements relating to FIG. 1.

[0102] The closure assembly 1 comprises a lid element 3 with an opening 4 and comprises a closure element 5 which is arranged on the lid element 3 and which serves for repeatably closing the opening 4. The lid element 3 has an outer side 6 and an inner side 7, and the opening 4 has an opening edge 8 and an opening plane 9 formed by the opening edge 8. The closure element has a base part 10, a tab 11 and a lever element 12. The base part 10 has a frame part 13, which is arranged on the opening edge 8 and which has a window 14, and a flap 15, which is pivotably connected to the frame part 13 for the purposes of closing the window 14 and thus the opening 4. The tab 11 is pivotably connected via a first axis of rotation 16 to the frame part 13. The lever element 12 is connected via a second axis of rotation 17 to the tab 11 and via a third axis of rotation 18 to the flap 15.

[0103] A new state of the closure element 5, as illustrated in FIG. 3, refers to the state of the closure element 5 prior to the tab 11 being actuated, that is to say pivoted, for the first time.

[0104] In the new state, the tab 11 is situated in an initial position 20, that is to say in a non-pivoted state. If the tab 11 is situated in the non-pivoted initial position 20, the flap 15 has also not been pivoted, and the window 14 or the opening 4 is thus closed.

[0105] The tab 11 is pivotable between the non-pivoted initial position 20 and a maximally pivoted end position 32 (see FIGS. 9 and 10). In the end position 32 of the tab 11, the flap 15 is arranged in a maximally pivoted position, and the window 14 or the opening 4 is open to a maximum extent.

[0106] In the initial position 20, the content of the beverage container 2 is sealed off in gas-tight fashion with respect to the surroundings 31 of the beverage container 2.

[0107] The closure element 5 is of single-piece form, that is to say the individual components base part 10, tab 11 and lever element 12 are captively connected to one another. It can be seen in FIG. 2 that said components are producible independently of one another and connectable to one another during the course of an assembly process.

[0108] The first axis of rotation 16 and the second axis of rotation 17 are arranged parallel and with a spacing 19 to one another.

[0109] The frame part 13 is arranged in positionally fixed and immovable fashion on the opening edge 8. The lever element 12, the flap 15 and the tab 11 are connected to the lid element 3 via the frame part 13. The lever element 12, flap 15 and tab 11 are arranged so as to be movable relative to the frame part 13.

[0110] In particular, the third axis of rotation 18 is also arranged parallel to the other axes of rotation 16, 17.

[0111] During a pivoting movement of the tab 11, the tab 11 is in particular rotated relative to the frame part 13 about the first axis of rotation 16. Owing to the spacing 19 between the first axis of rotation 16 and the second axis of rotation 17, the second axis of rotation 17, that is to say the connection between the lever element 12 and the tab 11, likewise rotates about the first axis of rotation 16 during the course of this first pivoting movement 21.

[0112] The third axis of rotation 18 is arranged spaced apart from the second axis of rotation 17, and also spaced apart from the first axis of rotation 16. A position of the third axis of rotation 18 relative to the first axis of rotation 16 changes owing to the rotation of the second axis of rotation 17 about the first axis of rotation 16. The spacing between the second axis of rotation 17 and the third axis of rotation 18 is constant, or is defined by the lever element 12 on which said two axes of rotation 17, 18 are arranged.

[0113] The tab 11 is pivotable from a non-pivoted initial position 20 in a first pivoting movement 21 about the first axis of rotation 16 and, as a result of this first pivoting movement 21, the flap 15 is pivotable relative to the frame part 13. The motion of the first pivoting movement 21 is coupled via the lever element 12 to a second pivoting movement 23 of the flap 15.

[0114] The tab 11, the base part 10 and the lever element 12 interact in the manner of a toggle lever, such that a first pivoting movement 21 of the tab 11 about the first axis of rotation 16 by a first angular extent 22 causes a second pivoting movement 23 of the flap 15 relative to the opening plane 9, and a further first pivoting movement 21 of the tab 11 by a further first angular extent 22 causes a third pivoting movement 24 of the flap 15. Here, the second pivoting movement 23 and the third pivoting movement 24 are of different magnitude (see FIGS. 7 to 10 and 11 to 16).

[0115] The flap 15 is connected to the frame part 13 via a fourth axis of rotation 33.

[0116] The fourth axis of rotation 33 is arranged positionally fixedly between the frame part 13 and flap 15. The flap 15 may also be connected to the frame part 13 via a hinge 25, wherein then, the flap 15 could perform not only the rotational movement relative to the frame part 13 but also a translational movement (not illustrated here).

[0117] Proceeding from the initial position 20, a first pivoting movement 21 of the tab 11 initially causes only a small second pivoting movement 23 of the flap 15, or said second pivoting movement 23 only occurs in the first place beyond a minimum extent of the first pivoting movement 21. If the tab 11 is pivoted progressively further, that is to say to the end position 32 of the tab 11, the flap 15 is pivoted with increasing intensity.

[0118] In the case of an unchanging rotational speed of the tab 11 about the first axis of rotation 16, it is thus the case that a rotational speed of the flap 15 about the fourth axis of rotation 33 varies. A rotational speed of the flap 15 is very low initially, that is to say proceeding from the initial position 20, whereas the rotational speed of the flap 15 increases as a first pivoting movement 21 of the tab 11 progresses.

[0119] The acting forces or torques vary inversely with respect to the rotational speeds or the speeds of the respective pivoting movement. Thus, in the case of the very low rotational speed of the flap 15, a very high torque can be transmitted to the flap 15, such that, specifically in the region of the initial position 20, that is to say when the flap 15 bears against the frame part 13 for the purposes of closing the window 14, a high torque is present for sealing the connection between flap 15 and frame part 13 or for opening the flap 15, that is to say for performing the second pivoting movement 23.

[0120] The frame part 13 is arranged captively on the opening edge 8. The frame part 13 is arranged on the opening edge 8 via a form-fitting connection, and is detachable from the opening edge 8 only through destruction of the frame part 13. The frame part 13 is installed on the opening edge 8 by way of a plastic deformation of the frame part 13. The plastic deformation may for example be performed by way of a thermal treatment of the frame part 13, for example at least local heating.

[0121] Between the inner side 7 and a contact surface 26 of the frame part 13, there is arranged a first gasket 27 which encircles the opening 4. The contact surface 26 is oriented parallel to a partial surface of the inner side 7 of the lid element 3. The first gasket 27 is arranged in the region of said partial surface. The first gasket 27 is fastened to the frame part 13 and is arranged on said partial surface during the course of installation of the frame part 13 on the lid element 3. The first gasket 27 may be producible or produced together with the frame part 13, and optionally also with the flap 15, during the course of a two-component injection molding process. It is optionally also possible for the first gasket 27 to be producible separately and then arrangeable in the intended position between contact surface 26 and lid element 3.

[0122] Between the frame part 13 and the flap 15, there is arranged a second gasket 28 which encircles the window 14. Said second gasket 28 allows sealing of the window 14 or of the opening 4 by way of a sealed connection between flap 15 and frame part 13. The second gasket 28 is arranged on the frame part 13. The second gasket 28 may be producible or produced together with the frame part 13 during the course of a two-component injection molding process. It is optionally also possible for the second gasket 28 to be producible separately and then arrangeable in the intended position between flap 15 and frame part 13.

[0123] The tab 11 is connected, only in a non-pivoted initial position 20, via a seal element 29 to the base part 10. The connection via the seal element 29 is destroyed when a first pivoting movement 21 of the tab 11 is performed for the first time. The seal element 29 serves for indicating the state of the closure element 5 or of the beverage container 2. An undamaged seal element 29 signals that the closure element 5 has not yet been actuated, that is to say the beverage container 2 has not yet been opened. By contrast, a damaged seal element 29 signals that the closure element 5 has been actuated at least once, that is to say the beverage container 2 has been opened at least once.

[0124] FIG. 5 shows the closure assembly 1 as per FIG. 3 in a perspective view, with the tab 11 in an initial position 20. FIG. 6 shows the closure assembly 1 as per FIG. 5 in a perspective view in section. FIG. 7 shows the closure assembly 1 as per FIG. 3 in a perspective view, with the tab 11 in a pivoted position. FIG. 8 shows the closure assembly 1 as per FIG. 7 in a perspective view in section. FIG. 9 shows the closure assembly 1 as per FIG. 3 in a perspective view, with the tab 11 in an end position 32. FIG. shows the closure assembly 1 as per FIG. 9 in a perspective view in section. FIG. 11 shows the closure assembly 1 as per FIG. 3 in a side view in section, with the flap 15 closing the window 14. FIG. 12 shows the closure assembly 1 as per FIG. 11 in a side view in section, with the flap having been pivoted by one angular degree. FIG. 13 shows the closure assembly 1 as per FIGS. 11 and 12 in a side view in section, with the flap having been pivoted by “10” angular degrees. FIG. 14 shows the closure assembly 1 as per FIGS. 11 to 13 in a side view in section, with the flap 15 having been pivoted by “20” angular degrees. FIG. 15 shows the closure assembly 1 as per FIGS. 11 to 14 in a side view in section, with the flap 15 having been pivoted by “30” angular degrees. FIG. 16 shows the closure assembly 1 as per FIGS. 11 to 15 in a side view in section, with the tab 11 arranged in the end position 32.

[0125] FIGS. 5 to 16 will be described jointly below. Reference is made to the statements relating to FIGS. 2 to 4.

[0126] Proceeding from a non-pivoted initial position 20 (see FIGS. 5 and 6), the first pivoting movement 21 of the tab 11 by at least approximately 55 angular degrees causes the second pivoting movement 23 of the flap 15 of approximately one angular degree (see FIG. 12). If the first pivoting movement 21 of the tab 11 is approximately 90 angular degrees, the flap 15 is pivoted further through the third pivoting movement 24, and the entire second pivoting movement 23 (that is to say the preceding second pivoting movement 23 and the third pivoting movement 24 together) is approximately angular degrees (see FIG. 13). If the first pivoting movement 21 of the tab 11 is approximately 120 angular degrees, the second pivoting movement 23 is approximately 20 angular degrees (see FIG. 14). If the first pivoting movement 21 of the tab 11 is approximately 135 angular degrees, the second pivoting movement 23 is approximately 30 angular degrees (see FIG. 15). If the first pivoting movement 21 of the tab 11 is approximately 170 angular degrees, the second pivoting movement 23 is approximately 45 angular degrees (see FIG. 15).

[0127] Proceeding from the non-pivoted initial position 20, the first pivoting movement of the tab 11 by approximately 180 angular degrees, that is to say into the end position 32 causes the second pivoting movement 23 of approximately 45 angular degrees (see FIG. 16).

[0128] Proceeding from the initial position 20, a first pivoting movement 21 of the tab 11 initially causes only a small second pivoting movement 23 of the flap 15, or said second pivoting movement 23 only occurs in the first place beyond a minimum extent of the first pivoting movement 21 (FIGS. 11 and 12). If the tab 11 is pivoted progressively further, that is to say to the end position 32 of the tab 11, the flap 15 is pivoted with increasing intensity.

[0129] In the case of an unchanging rotational speed of the tab 11 about the first axis of rotation 16, it is thus the case that a rotational speed of the flap 15 about the fourth axis of rotation 33 varies. A rotational speed of the flap 15 is very low initially, that is to say proceeding from the initial position 20, whereas the rotational speed of the flap 15 increases as a first pivoting movement 21 of the tab 11 progresses.

[0130] The acting forces or torques vary inversely with respect to the rotational speeds or the speeds of the respective pivoting movement. Thus, in the case of the very low rotational speed of the flap 15, a very high torque can be transmitted to the flap 15, such that, specifically in the region of the initial position 20, that is to say when the flap 15 bears against the frame part 13 for the purposes of closing the window 14, a high torque is present for sealing the connection between flap 15 and frame part 13 or for opening the flap 15, that is to say for performing the second pivoting movement 23.

[0131] The tab 11 assumes a self-locking position in a maximally pivoted end position. Said self-locking position is stable, that is to say a torque is required to move the tab 11 out of said position. The tab 11 is, after the first actuation or pivoting of the tab 11, held in the initial position 20 by way of an elastic deformation of another component of the closure element 5. The elastic deformation of the other component allows the formation of a form fit or of a force fit, which prevents a further pivoting movement or a backward pivoting movement of the tab 11. This form fit or force fit can be eliminated again in particular by way of an actuation of the tab 11.

[0132] FIG. 17 shows a closure assembly 1 in a side view in section, with the tab 11 in an initial position 20. FIG. 18 shows the closure assembly 1 as per FIG. 17 in a side view in section, with the tab 11 in a pivoted position. FIGS. 17 and 18 will be described jointly below. Reference is made to the statements relating to FIGS. 2 to 16.

[0133] The base part 10 has a ventilation element 30, wherein, upon a first pivoting movement 21 of the tab 11, a fluidic connection is formed between the inner side 7 and the outer side 6 through the ventilation element 30. The first pivoting movement 21 of the tab 11 causes a deformation of the ventilation element 30. The ventilation element 30 is arranged on the flap 15. The ventilation element 30 is integrally connected to the base part 10. The ventilation element 30 may be producible or produced together with the frame part 13 and with the flap 15 during the course of a two-component injection molding process.

[0134] The ventilation element 30 is of tubular design and makes a fluidic connection possible between the interior or the inner side 7 of the beverage container 3 and the surroundings 31 of the beverage container 2. Venting, that is to say a pressure equalization between the interior of the beverage container 2 and the surroundings 31 of the beverage container 2, is possible via the ventilation element 30. The ventilation element 30 has, along the tubular form, a preferably constant minimum opening cross section of 1 to 4 mm.sup.2. This minimum opening cross section is at least locally reduced to zero in the deformed state of the ventilation element 30, such that, when the tab 11 is arranged in the initial position 20, the fluidic connection is shut off, and therefore no ventilation is possible via the ventilation element 30 (see FIG. 17).

[0135] In the case of the closure element 5 proposed here, it is merely the case that the flap 15 is pivoted away from the frame part 13 in order to open up the window 14 or the opening 5. Here, before the pivoting of the flap 15, venting occurs via a ventilation element 30, such that the flap 15 does not need to be moved counter to the internal pressure that may prevail in the beverage container 2. Pivoting of the flap 15 may however also be possible with low torques even without a ventilation element 30 or venting, because a low torque at the tab 11 is converted into a high torque at the flap 15 owing to the toggle lever principle that is implemented.

[0136] FIG. 19 shows a further closure element 5 in an exploded illustration in a perspective view. FIG. 20 shows a closure assembly 1 with a closure element 5 as per FIG. 19 in a perspective view in section. FIG. 21 shows the further closure assembly 1 as per FIG. 20 in a perspective view in section. FIGS. 19 to 21 will be described jointly below. Reference is made to the statements relating to FIGS. 2 to 18.

[0137] In the case of the further closure element 5, by contrast to the closure element 5 that is illustrated in FIGS. 2 to 18, the flap 15 is pluggably connected to the frame part 13 via a fourth axis of rotation 33.

[0138] Furthermore, the lid element 3 is in this case illustrated in a different state of production, specifically only with an initially angled outer edge, and not with a bent-over outer edge (cf. FIGS. 3 to 16).

[0139] In particular, however, the arrangement of the closure element 5 is substantially independent of the state of production of the lid element 3. Optionally, only the opening 4 in the lid element 3 is required for the arrangement of the closure element 5, whilst other deformation processes could then also take place at a later point in time. It is however conventional for the lid element 3 to be fully deformed and for the closure element to only then be arranged on the lid element 3. The lid element 3 with closure element 5 is connected to the rest of the beverage container 2, that is to say base and wall, to form the finished beverage container 2.

[0140] Whereas the base part 10 in the case of the closure element as per FIGS. 2 to 18 is formed as a single piece (frame part 13 and flap 15 are cohesively connected at the fourth axis of rotation 33), the base part 10 in the case of the further closure element as per FIGS. 19 to 21 is of at least two-part form (frame part 13 and flap 15 form a pluggable connection, with the fourth axis of rotation 33 being formed by means of the connection).

[0141] FIG. 22 shows a closure assembly 1 with a protective flap 34 in a side view in section. FIG. 23 shows the closure assembly 1 as per FIG. 22, with the protective flap 34 in a pivoted position. FIG. 24 shows the closure assembly 1 as per FIGS. 22 and 23, with the tab 11 in an end position 32. FIGS. 22 to 24 will be described jointly below. Reference is made to the statements relating to FIGS. 19 to 21.

[0142] By contrast to the closure element 5 that is illustrated in FIGS. 19 to 21, the closure element 5 illustrated here has a protective flap 34 that is pivotably connected to the tab 11, which is now of shortened design, via a fifth axis of rotation 35. The protective flap 34 covers the opening 4 and/or the window 14 and thus enables at least parts of the closure element 5 to be arranged so as to be protected with respect to the surroundings 31. The protective flap 34 has a seal element 29 via which the protective flap 34 is connected to the frame part 13. A movement of the protective flap 34 for the first time causes the seal element 29 to be destroyed.

[0143] It can be seen in FIG. 23 that the protective flap 34 is (proceeding from an initial position 20) moved initially in a first direction of rotation, and the seal element 29 is thus destroyed. It can be seen in FIGS. 23 and 24 that a further pivoting movement of the protective flap 34 then causes the tab 11 to be pivoted (first pivoting movement 21 in FIG. 23), wherein the protective flap 34 is at least temporarily supported on the lid element 3.

[0144] In FIG. 24, the protective flap 34 and the tab 11 are arranged in a fully pivoted end position 32, with the flap 15 likewise in an arrangement in which it has been pivoted through the second pivoting movement 23 and through the third pivoting movement 24.

LIST OF REFERENCE DESIGNATIONS

[0145] 1 Closure assembly [0146] 2 Beverage container [0147] 3 Lid element [0148] 4 Opening [0149] 5 Closure element [0150] 6 Outer side [0151] 7 Inner side [0152] 8 Opening edge [0153] 9 Opening plane [0154] 10 Base part [0155] 11 Tab [0156] 12 Lever element [0157] 13 Frame part [0158] 14 Window [0159] 15 Flap [0160] 16 First axis of rotation [0161] 17 Second axis of rotation [0162] 18 Third axis of rotation [0163] 19 Spacing [0164] 20 Initial position [0165] 21 First pivoting movement [0166] 22 First angular extent [0167] 23 Second pivoting movement [0168] 24 Third pivoting movement [0169] 25 Hinge [0170] 26 Contact surface [0171] 27 First gasket [0172] 28 Second gasket [0173] 29 Seal element [0174] 30 Ventilation element [0175] 31 Surroundings [0176] 32 End position [0177] 33 Fourth axis of rotation [0178] 34 Protective flap [0179] 35 Fifth axis of rotation