A snap-on bottle cap connection structure and a foaming liquid storage bottle using the same

Abstract

The present invention discloses a snap-on bottle cap connection structure and a foaming liquid storage bottle using the same. The snap-on bottle cap connection structure comprises a bottleneck with an external thread and a bottle cap with an internal thread. The bottle cap is provided with a top wall and a side wall connected to each other. The internal thread is provided on the inner surface of the side wall. A convex portion is provided on the outer wall surface of the bottleneck below the external thread. An inverted buckle is provided at the bottom end of the side wall of the bottle cap. When the bottle cap is fixedly connected to the bottleneck thread, the inverted buckle is buckled on the bottom surface of the convex portion. The snap-on bottle cap connection structure also comprises a joint connecting the inner cavity of the bottleneck and an external liquid channel. A through hole for the joint to extend into the bottleneck is provided on the top wall of the bottle cap. The joint is provided on a joint connector. The joint connector is detachably snap-connected to the bottle cap or the bottleneck. The snap-on bottle cap connection structure of the present invention is simpler, and the joint can be detached for reuse.

Description

Technical Field

[0001] The invention relates to a snap-on bottle cap connection structure and a foaming liquid storage bottle using the snap-on bottle cap connection structure. Background Art

[0002] In the existing container bottles, the bottle cap is usually detachably connected to the bottle mouth of the container bottle, so that the bottle cap can be removed at will to replace the solution in the container bottle or the liquid in the container bottle cannot be effectively protected. However, for some container bottles storing specified solutions, it is often not desired that the bottle cap be opened, and the specified solution be replaced, resulting in different related properties of the solution, affecting the use. Therefore, in the prior art, there is an anti-disassembly structure for preventing the bottle cap from being disassembled. For example, the Chinese invention patent announcement number is CN107031951A, and the patent name is "An anti-reversal structure and a liquid bottle composed of the same". The ratchet structure is adopted, so that the bottle cap can only rotate in one direction in the tightening direction, but cannot rotate in the reverse direction to loosen, thereby achieving the purpose of preventing the bottle cap from being disassembled. However, the structure of the patent technical solution is relatively complex and needs further improvement.

[0003] In addition, in some prior arts, a liquid inlet joint or a liquid outlet joint is also provided on the bottle cap, and the joint is usually non-detachably connected to the bottle cap, so that the joint cannot be reused, which wastes resources. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a snap-on bottle cap connection structure with a simple structure and a foaming liquid storage bottle using the snap-on bottle cap connection structure, wherein the joint of the bottle cap can be detached for repeated use.

[0005] To achieve the above-mentioned purpose, according to one aspect of the present invention, the present invention provides the following technical solutions: a snap-on bottle cap connection structure, comprising a bottleneck with an external thread and a bottle cap with an internal thread, the bottle cap being provided with a top wall and a side wall connected to each other, the internal thread being provided on the inner surface of the side wall, a raised portion being provided on the outer wall surface of the bottleneck below the external thread, an inwardly arranged undercut being provided at the bottom end of the side wall of the bottle cap, and when the bottle cap is fixedly connected to the bottleneck thread, the undercut is buckled on the bottom surface of the raised portion; and also comprising a joint connecting the inner cavity of the bottleneck and an external liquid channel, a through hole being provided on the top wall of the bottle cap for the joint to extend into the bottleneck, the joint being provided on a joint connector, and the joint connector being detachably snap-connected to the bottle cap or the bottleneck.

[0006] In an optional or preferred embodiment, the raised portion is an annular rib extending along the circumference of the bottleneck, and a plurality of undercuts are provided and are spaced apart along the circumference of the side wall of the bottle cap.

[0007] In an optional or preferred embodiment, the edge of the through hole extends downward to form a concave cavity, the bottom wall of the concave cavity is provided with a through flow hole, one end of the connector is inserted into the concave cavity and sealed with the inner wall of the concave cavity, when the bottle cap is threadedly fixed to the bottleneck, the concave cavity is located in the bottleneck, and the connector is connected to the inner cavity of the bottleneck through the through flow hole.

[0008] In an optional or preferred embodiment, the inner diameter of the cavity is in the range of 6.2mm-7.2mm, the outer diameter of the part of the connector inserted into the cavity is 5.8mm-6.8mm, two connectors are provided, and correspondingly, two through holes and two concave cavities are provided respectively, and the center distance between the two connectors is 8.2mm-9.2mm, and correspondingly, the center distance between the two concave cavities is 8.2mm-9.2mm.

[0009] In an optional or preferred embodiment, the joint connector includes a top plate and a clamping arm connected to both sides of the top plate and capable of elastic deformation, the joint is arranged on the top plate, the top end of the clamping arm is connected to the top plate, the bottom end of the clamping arm is provided with an inwardly arranged buckle, the bottle cap or the bottleneck is provided with a circumferentially extending clamping rib, the buckle is engaged with the clamping rib, and the joint connector is also provided with a driving part that drives the clamping arm to deform so that the buckle is separated from the clamping rib.

[0010] In an optional or preferred embodiment, the driving portion is a pressure rod connected to the outer wall surface of the clamping arm, the bottom end of the pressure rod is arranged close to the buckle, and the top end of the pressure rod is opened outward toward the top plate. When the top ends of the pressure rod on each clamping arm are pressed toward each other, the bottom end of the pressure rod drives the buckle to open outward to separate from the clamping rib.

[0011] In an optional or preferred embodiment, the driving part is a pressure plate connected to the bottom end of the clamping arm, and two pressure plates are provided and arranged symmetrically. Both sides of each pressure rod are connected to the bottom end of the clamping arm through connecting arms, respectively, and the two pressure plates are pressed toward each other. The pressure plate drives the two buckles to open outward through the connecting arms to separate from the clamping ribs.

[0012] According to another aspect of the present invention, the present invention also provides a foaming liquid storage bottle, comprising a hollow bottle body and the above-mentioned snap-on bottle cap connection structure, the joint comprising a liquid inlet joint and a liquid outlet joint, the top of the bottle body is provided with the bottleneck, the inner cavity of the bottle body is divided into a mixing chamber and a liquid storage chamber, the mixing chamber is located at the bottleneck and the bottom of the mixing chamber is connected to the liquid storage chamber.

[0013] In an optional or preferred embodiment, it also includes a mixing tube with an opening at the top, which is sleeved in the bottleneck, the inner cavity of the mixing tube forms the mixing chamber, the bottom of the mixing tube is provided with a flow hole, the top edge of the mixing tube is provided with an outward-turned flange, and when the bottle cap is threadedly fixedly connected to the bottleneck, the flange is clamped between the lower surface of the top wall of the bottle cap and the opening edge of the bottleneck.

[0014] In an optional or preferred embodiment, a gasket is further provided, the gasket is clamped between the lower surface of the top wall of the bottle cap and the opening edge of the bottleneck, and the flange is clamped between the lower surface of the top wall of the bottle cap and the gasket.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a raised portion on the outer wall surface of the bottleneck below the external thread, and provides an inward buckle at the bottom end of the side wall of the bottle cap. When the bottle cap is fixedly connected to the bottleneck thread, the buckle is buckled on the bottom surface of the raised portion, so that the bottle cap cannot move in the direction of screwing out of the bottleneck, effectively preventing the bottle cap from being disassembled, and has a simple structure.

[0017] The present invention provides a joint connector, and enables the joint connector to be detachably snap-connected with the bottle cap or the bottle neck, thereby realizing the detachability of the joint, and the joint can be reused to save resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the advantages of the invention more easily understood, the invention briefly described above will be described in more detail by reference to specific embodiments shown in the accompanying drawings. It will be understood that these drawings depict only typical embodiments of the invention and should not be considered as limiting the scope of protection thereof, and the invention is described and explained with additional specificity and details through the accompanying drawings. In the drawings:

[0019] Figure 1 It is a three-dimensional assembly diagram of a snap-on bottle cap connection structure according to a first preferred embodiment of the present invention;

[0020] Figure 2 for Figure 1 A front view of

[0021] Figure 3 for Figure 2 Sectional view of AA in the middle;

[0022] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0023] Figure 5 is a three-dimensional exploded view of a snap-on bottle cap connection structure according to a first preferred embodiment of the present invention;

[0024] Figure 6 for Figure 5 A front view of

[0025] Figure 7 for Figure 6 Cross-sectional view of CC;

[0026] Figure 8 is a three-dimensional assembly diagram of a snap-on bottle cap connection structure according to a second preferred embodiment of the present invention;

[0027] Fig. 9 for Figure 8 A front view of

[0028] Fig.10 for Fig. 9 Cross-sectional view of the middle DD;

[0029] Fig.11 Fig.10 A partial enlarged view of point E in the middle;

[0030] Fig.12 is a three-dimensional exploded view of a snap-on bottle cap connection structure according to a second preferred embodiment of the present invention;

[0031] Fig.13 for Fig.12 A front view of

[0032] Fig.14 for Fig.13 Cross-sectional view of the middle FF;

[0033] Fig.15 It is a cross-sectional view of the fixed connection between the bottle cap and the bottle neck according to the first and second preferred embodiments of the present invention.

[0034] The accompanying drawings are marked as follows:

[0035] 10-bottleneck; 11-protrusion; 12-rib;

[0036] 20-bottle cap; 21-top wall; 211-through hole; 22-side wall; 221-undercut; 23-recessed cavity; 231-through hole;

[0037] 30-connector; 31-liquid inlet connector; 32-liquid outlet connector; 33-seal ring installation groove;

[0038] 40-joint connector; 41-top plate; 42-clamp arm; 421-clip; 43-driving part; 44-connecting arm;

[0039] 60-bottle body;

[0040] 70-mixing tube; 71-flange; 72-flow hole;

[0041] 80-Shims. DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] In the discussion below, details are given to provide a more thorough understanding of the present invention. However, it will be appreciated by those skilled in the art that the present invention can be implemented without one or more of these details. In certain examples, some technical features known in the art are not described in detail to avoid confusion with the present invention. It should be noted that the terms "upper", "lower", "front", "back", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0044] Please refer to Figures 1 to 7 , Fig.15 A snap-on bottle cap connection structure according to a first preferred embodiment of the present invention comprises a bottle neck 10 with an external thread and a bottle cap 20 with an internal thread. The bottle cap 20 is provided with a top wall 21 and a side wall 22 connected to each other, the internal thread of the bottle cap 20 is provided on the inner surface of the side wall 22, a raised portion 11 is provided on the outer wall surface of the bottle neck 10 below the external thread, and an inwardly arranged undercut 221 is provided at the bottom end of the side wall 22 of the bottle cap 20. When the bottle cap 20 is fixedly connected to the bottle neck 10 by threads, the undercut 221 is buckled on the bottom surface of the raised portion 11, so that the bottle cap 20 cannot move in the direction of screwing out of the bottle neck 10, effectively preventing the bottle cap 20 from being disassembled, and the structure is simple.

[0045] The snap-on bottle cap connection structure also includes a joint 30 connecting the inner cavity of the bottleneck 10 with the external liquid channel. A through hole 211 is provided on the top wall 21 of the bottle cap 20 for the joint 30 to extend into the bottleneck 10. The joint 30 is arranged on a joint connector 40, and the joint connector 40 is detachably snap-connected to the bottle cap 20 or the bottleneck 10.

[0046] In this embodiment, the raised portion 11 is an annular convex rib extending along the circumference of the bottleneck 10, and a plurality of undercuts 221 are provided and arranged at intervals along the circumference of the side wall 22 of the bottle cap 20. In order to make the bottle cap 20 rotate more smoothly, preferably, the raised portion 11 is provided with a straight guide surface or a curved guide surface, and the bottom surface of the raised portion 11 is a straight surface.

[0047] In this embodiment, Fig.15As shown, the edge of the through hole 211 extends downward to form a concave cavity 23, and the bottom wall of the concave cavity 23 is provided with a through-flow hole 231. One end of the connector 30 is inserted into the concave cavity 23 and is sealed with the inner wall of the concave cavity 23. When the bottle cap 20 is threadedly fixedly connected to the bottleneck 10, the concave cavity 23 is located in the bottleneck 10, and the connector 30 is connected to the inner cavity of the bottleneck 10 through the through-flow hole 231. By providing the concave cavity 23, a reliable seal can be formed between the connector 30 and the bottle cap 20 to prevent liquid from flowing out of the through hole 211. The portion of the connector 30 inserted into the concave cavity 23 is provided with a sealing ring installation groove 33 (such as Figure 6 As shown in the figure, a sealing ring is provided in the sealing ring installation groove 33, and the outer wall of the joint 30 and the inner wall of the concave cavity 23 are sealed and matched by the sealing ring (not shown).

[0048] Preferably, Figure 6 and Fig.15 As shown, in this embodiment, the inner diameter R2 of the cavity 23 ranges from 6.2 mm to 7.2 mm, the outer diameter R1 of the portion of the connector 30 inserted into the cavity 23 is 5.8 mm to 6.8 mm, two connectors 30 are provided, and correspondingly, two through holes 211 and two cavity 23 are provided respectively, and the center distance L1 of the two connectors 30 is 8.2 mm to 9.2 mm, and correspondingly, the center distance L2 of the two cavity 23 is 8.2 mm to 9.2 mm.

[0049] In this embodiment, the joint connector 40 includes a top plate 41 and a clamp arm 42 connected to both sides of the top plate 41 and capable of elastic deformation. The joint 30 is provided on the top plate 41. The top end of the clamp arm 42 is connected to the top plate 41. The bottom end of the clamp arm 42 is provided with a buckle 421 arranged inwardly. The bottle cap 20 or the bottle neck 10 is provided with a circumferentially extending clamp 12. In this embodiment, the clamp 12 is provided on the bottle neck 10. The buckle 421 is engaged with the clamp 12. The joint connector 40 is also provided with a driving part 43 that drives the clamp arm 42 to deform so that the buckle 421 is separated from the clamp 12.

[0050] The driving part 43 is a pressure rod connected to the outer wall of the clamping arm 42. The bottom end of the pressure rod is arranged close to the buckle 421. The top end of the pressure rod opens outward toward the top plate 41. When the top ends of the pressure rods on each clamping arm 42 are pressed in opposite directions, the bottom end of the pressure rod drives the buckle 421 to open outward to separate from the clamping rib 12.

[0051] Please refer to Figures 8 to 15 , a snap-on bottle cap connection structure according to the second preferred embodiment of the present invention,

[0052] The difference between this embodiment and the first preferred embodiment is the different structure of the driving part 43. Specifically, in this embodiment, the driving part 43 is a pressing plate connected to the bottom end of the clamping arm 42, and two pressing plates are provided and arranged symmetrically. Both sides of each pressing rod are connected to the bottom end of the clamping arm 42 through a connecting arm 44, respectively, and the two pressing plates are pressed toward each other. The pressing plate drives the two buckles 421 to open outward through the connecting arm 44 to separate from the clamping rib 12.

[0053] Please refer to Figures 1 to 15 According to another aspect of the present invention, the present invention further provides a foaming liquid storage bottle, comprising a hollow bottle body 60, and also comprising the snap-on bottle cap connection structure described in any of the above embodiments, the joint 30 comprises a liquid inlet joint 31 and a liquid outlet joint 32, the top of the bottle body 60 is provided with a bottleneck 10, the inner cavity of the bottle body 60 is divided into a mixing cavity and a liquid storage cavity, the mixing cavity is located at the bottleneck 10 and the bottom of the mixing cavity is connected to the liquid storage cavity. The liquid storage cavity is used to store the foaming liquid, and the foaming liquid storage bottle can be used in a device that requires foaming, such as a foaming device of a smart toilet.

[0054] In this embodiment, a mixing tube 70 with an opening at the top is further included. The mixing tube 70 is sleeved in the bottleneck 10. The inner cavity of the mixing tube 70 forms a mixing cavity. Two flow holes 72 are provided at the bottom of the mixing tube 70. The mixing cavity is connected to the liquid storage cavity through the two flow holes 72. The two flow holes 72 are respectively provided on the side wall and the bottom wall of the mixing tube 70 (such as Figure 7 The top edge of the mixing tube 70 is provided with an outwardly turned flange 71, and when the bottle cap 20 and the bottle neck 10 are threadedly fixedly connected, the flange 71 is clamped between the lower surface of the top wall 21 of the bottle cap 20 and the opening edge of the bottle neck 10.

[0055] Furthermore, the present embodiment further comprises a gasket 80, which is clamped between the lower surface of the top wall 21 of the bottle cap 20 and the opening edge of the bottle neck 10, and the flange 71 is clamped between the lower surface of the top wall 21 of the bottle cap 20 and the gasket 80. The gasket 80 is preferably made of rubber material to play a sealing role.

[0056] When the snap-on bottle cap connection structure adopts Figures 1 to 7 , Fig.15 In the first preferred embodiment shown, the assembly process of the foaming liquid storage bottle is as follows:

[0057] First, the gasket 80 is placed on the opening edge of the bottleneck 10; then, the mixing tube 70 is sleeved in the bottleneck 10, and the flange 71 of the mixing tube 70 abuts against the upper surface of the gasket 80; then, the bottle cap 20 is threadedly connected to the bottleneck 10. When the bottle cap 20 is threadedly connected to the bottleneck 10, the undercut 221 is buckled on the bottom surface of the raised portion 11, so that the bottle cap 20 cannot move in the direction of screwing out of the bottleneck 10, effectively preventing the bottle cap 20 from being disassembled; finally, the joint connector 40 is clamped with the clamping rib 12 on the bottleneck 10, and at the same time, one end of the joint 30 is inserted into the concave cavity 23 of the bottle cap 20 and sealed with the inner wall of the concave cavity 23. When the liquid in the bottle body 60 is used up, by pressing the top end of the pressure rod on each clamping arm 42 in opposite directions, the bottom end of the pressure rod drives the buckle 421 to open outward to separate from the clamping rib 12, so that the joint 30 can be disassembled for reuse.

[0058] When the snap-on bottle cap connection structure adopts Figures 8 to 15 In the second preferred embodiment shown, the assembly process of the foaming liquid storage bottle is as follows:

[0059] First, place the gasket 80 on the opening edge of the bottleneck 10; then, sleeve the mixing tube 70 inside the bottleneck 10, and the flange 71 of the mixing tube 70 abuts against the upper surface of the gasket 80; then, thread the bottle cap 20 with the bottleneck 10, and when the bottle cap 20 and the bottleneck 10 are threadedly connected in place, the undercut 221 is buckled on the bottom surface of the raised portion 11, so that the bottle cap 20 cannot move in the direction of screwing out of the bottleneck 10, effectively preventing the bottle cap 20 from being disassembled; finally, the joint connector 40 is buckled with the clamping rib 12 on the bottleneck 10, and at the same time, one end of the joint 30 is inserted into the concave cavity 23 of the bottle cap 20 and sealed with the inner wall of the concave cavity 23. When the liquid in the bottle body 60 is used up, by pressing the two pressing plates in opposite directions, the pressing plates drive the two buckles 421 to open outwards through the connecting arm 44 to separate from the clamping rib 12, so that the joint 30 can be disassembled for reuse.

[0060] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of the present invention. The terms used herein are only for describing specific implementation purposes and are not intended to limit the present invention. Terms such as "component" and the like appearing herein may refer to either a single part or a combination of multiple parts. Terms such as "installation" and "setting" and the like appearing herein may refer to either a component being directly attached to another component or a component being attached to another component through an intermediate. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0061] The above description shows and describes the preferred embodiments of the present invention. As before, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention, through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not depart from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A snap-on bottle cap connection structure, comprising a bottle neck with an external thread and a bottle cap with an internal thread, wherein the bottle cap is provided with a top wall and a side wall connected to each other, and the internal thread is provided on the inner surface of the side wall, characterized in that: A raised portion is provided on the outer wall surface of the bottleneck below the external thread, and an inverted buckle is provided at the bottom end of the side wall of the bottle cap, and when the bottle cap is fixedly connected to the bottleneck thread, the inverted buckle is buckled on the bottom surface of the raised portion; it also includes a joint connecting the inner cavity of the bottleneck and the external liquid channel, a through hole for the joint to extend into the bottleneck is provided on the top wall of the bottle cap, and the joint is provided on a joint connector, and the joint connector is detachably buckled with the bottle cap or the bottleneck; the joint connector includes a top plate and a clamping arm connected to both sides of the top plate and capable of elastic deformation, the joint is provided on the top plate, the top end of the clamping arm is connected to the top plate, the bottom end of the clamping arm is provided with a clamping buckle arranged inwardly, the bottle cap or the bottleneck is provided with a circumferentially extending clamping rib, the clamping rib is clamped and matched with the clamping rib, and the joint connector is also provided with a driving part for driving the clamping arm to deform so that the clamping rib is separated from the clamping rib.

2. A snap-on bottle cap connection structure according to claim 1, characterized in that: The raised portion is an annular convex rib extending along the circumference of the bottleneck, and a plurality of undercuts are provided and are spaced apart along the circumference of the side wall of the bottle cap.

3. The snap-on bottle cap connection structure according to claim 1, characterized in that: The edge of the through hole extends downward to form a concave cavity, and the bottom wall of the concave cavity is provided with a through-flow hole. One end of the connector is inserted into the concave cavity and sealed with the inner wall of the concave cavity. When the bottle cap is threadedly fixedly connected to the bottleneck, the concave cavity is located in the bottleneck, and the connector is connected to the inner cavity of the bottleneck through the through-flow hole.

4. A snap-on bottle cap connection structure according to claim 3, characterized in that: The inner diameter of the cavity is in the range of 6.2mm-7.2mm, the outer diameter of the part of the connector inserted into the cavity is 5.8mm-6.8mm, two connectors are provided, and correspondingly, two through holes and two concave cavities are provided respectively, and the center distance between the two connectors is 8.2mm-9.2mm, and correspondingly, the center distance between the two concave cavities is 8.2mm-9.2mm.

5. The snap-on bottle cap connection structure according to claim 1, characterized in that: The driving part is a pressure rod connected to the outer wall surface of the clamping arm, the bottom end of the pressure rod is arranged close to the buckle, and the top end of the pressure rod is opened outward toward the top plate. When the top ends of the pressure rods on each clamping arm are pressed toward each other, the bottom end of the pressure rod drives the buckle to open outward to separate from the clamping rib.

6. The snap-on bottle cap connection structure according to claim 1, characterized in that: The driving part is a pressure plate connected to the bottom end of the clamping arm. Two pressure plates are provided and arranged symmetrically. Both sides of each pressure plate are connected to the bottom end of the clamping arm through connecting arms respectively. The two pressure plates are pressed toward each other, and the pressure plate drives the two buckles to open outward through the connecting arms to separate from the clamping ribs.

7. A foaming liquid storage bottle, comprising a hollow bottle body, characterized in that: It also includes the snap-on bottle cap connection structure according to any one of claims 3 to 6, wherein the joint includes a liquid inlet joint and a liquid outlet joint, the top of the bottle body is provided with the bottleneck, the inner cavity of the bottle body is divided into a mixing chamber and a liquid storage chamber, the mixing chamber is located at the bottleneck and the bottom of the mixing chamber is connected to the liquid storage chamber.

8. The foaming liquid storage bottle according to claim 7, characterized in that: It also includes a mixing tube with an opening at the top, which is sleeved in the bottleneck, the inner cavity of the mixing tube forms the mixing chamber, the bottom of the mixing tube is provided with a flow hole, the top edge of the mixing tube is provided with an outward-turned flange, and when the bottle cap is fixedly connected to the bottleneck by threads, the flange is clamped between the lower surface of the top wall of the bottle cap and the opening edge of the bottleneck.

9. The foaming liquid storage bottle according to claim 8, characterized in that: A gasket is also provided, which is clamped between the lower surface of the top wall of the bottle cap and the opening edge of the bottleneck, and the flange is clamped between the lower surface of the top wall of the bottle cap and the gasket.

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