Crown-shaped bottle cap with novel sealing assembly

Abstract

The utility model discloses a crown-shaped bottle cap with a novel sealing assembly. The crown-shaped bottle cap comprises a cap body and the sealing assembly. The cap body comprises a base body and a side wall, a crown-shaped bottle cap body with an opening in the bottom is formed after the base body and the side wall are enclosed, and the opening faces downwards and covers a bottle opening. Skirt teeth clamped with the bottle opening are arranged around the side wall; the sealing assembly is arranged in the cap body, and after the cap body covers the bottle opening, the sealing assembly abuts against the bottle opening and is used for sealing the bottle opening, maintaining the pressure in the bottle and increasing the friction force between the sealing assembly and the inner wall of the bottle opening. According to the crown-shaped bottle cap, the structure of the cap body is refined, and the structure and the size of the sealing assembly are reasonably set, so that the crown-shaped bottle cap can bear higher in-bottle pressure which can reach 1.2 MPa, the product sealing effect is better, and the product quality is improved. Particularly, the opening sound effect can be increased along with the friction between the sealing assembly and the inner wall of the bottle opening and the increase of the pressure in the bottle, and the emotion positive feedback, the achievement sense, the satisfaction sense and the happiness obtained by an opener at the opening moment can be further improved.

Description

Technical Field

[0001] The utility model belongs to the field of outer packaging and packaging bottle caps, and relates to a crown-shaped bottle cap with a novel sealing component. Background Art

[0002] Due to the structure and sealing structure of the current sealed bottle cap, the pressure resistance of the bottle cap can only reach about 0.8MPa. This low pressure resistance is not conducive to the needs of transportation and storage, and the sealing performance of beverages is not stable. On the other hand, the low pressure resistance of the bottle cap also results in a low decibel sound during the bottle cap opening process, which cannot provide the opener with positive emotional feedback, a sense of accomplishment and satisfaction at the moment of opening the bottle cap. When opening the bottle cap at a dinner party, it does not enhance the drinking atmosphere and dining experience for the drinker. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a crown-shaped bottle cap.

[0004] It comprises a cover body (1) and a sealing assembly (2),

[0005] The cap body (1) comprises a base (11) and a side wall (12). The base (11) and the side wall (12) are enclosed to form a crown-shaped cap body with an opening at the bottom. The opening is downwardly covered on the bottle mouth. Skirt teeth (13) are provided around the side wall (12) and engage with the bottle mouth.

[0006] The sealing component (2) is arranged inside the cover body (1). After the cover body (1) is closed with the bottle mouth, the sealing component (2) abuts against the bottle mouth to seal the bottle mouth, maintain the pressure in the bottle, and increase the friction between the sealing component and the inner wall of the bottle mouth.

[0007] Furthermore, in some embodiments, the sealing assembly (2) includes a sealing cavity (20), a sealing groove (23) and a sealing outer ring (24) arranged coaxially with the base (11), and the space enclosed by the sealing cavity (20), the sealing groove (23) and the sealing outer ring (24) is used to accommodate the bottle mouth.

[0008] Furthermore, in some embodiments, the sealing cavity (20) includes a pressure pad (21) and a sealing inner ring (22), the pressure pad (21) is fitted with the base (11) and is coaxially arranged; the sealing inner ring (22) surrounds the outer edge of the pressure pad (21) and is coaxially arranged therewith, the top of the sealing inner ring (22) is fitted with the lower surface (111) of the base, and the bottom extends in the opposite direction of the base (11), and the outer wall (224) of the sealing inner ring is matched with the inner wall of the bottle mouth.

[0009] Further, in some embodiments, the inner diameter (a) of the top of the sealing inner ring (22) ranges from 10 mm to 21.8 mm, and the outer diameter (b) of the top ranges from 15 mm to 22 mm; the inner diameter (c) of the bottom of the sealing inner ring (22) ranges from 10 mm to 21.8 mm, and the outer diameter (d) of the bottom ranges from 15 mm to 21.8 mm.

[0010] Further, in some embodiments, the sealing cavity (20) further includes support ribs (25), and a plurality of the support ribs (25) are symmetrically arranged around the axis of the base body (11).

[0011] Further, in some embodiments, the sealing groove (23) is arranged to fit the sealing inner ring (22), and there is a retention gap (4) between the sealing groove and the side wall (12). The sealing outer ring (24) is arranged in the retention gap (4), and a deformation gap (5) is formed between the sealing outer ring (24) and the side wall (12).

[0012] Further, in some embodiments, the height range of the sealing inner ring (22) extending downward along the axis of the base body (11) is between 1.5 and 6 mm.

[0013] Further, in some embodiments, a pressure-increasing ring (26) is further arranged in the sealing cavity (20). The pressure-increasing ring (26) is coaxially arranged with the base body (11), and the pressure-increasing ring (26) is arranged to fit the inner side wall of the sealing inner ring (223) and the lower surface of the pressure-bearing pad (212) to enhance the pressure storage capacity of the sealing cavity (20).

[0014] Further, in some embodiments, the cover body (1) further includes a transition ring (3). The transition ring (3) is used to connect the base body (11) and the side wall (12), and the side of the transition ring (3) facing outside the cover body (1) is the convex side (31).

[0015] Further, in some embodiments, a tightening ring (27) is arranged at the lower end of the sealing inner ring (22). The thickness of the tightening ring (27) is less than the thickness of the lower end of the sealing inner ring (22) and is used to guide the sealing inner ring (22) to be smoothly inserted into the inside of the bottle mouth.

[0016] The crown-shaped bottle cap provided by the present utility model further has the following beneficial effects:

[0017] By refining the structure of the cap body and rationally configuring the structure and dimensions of the sealing assembly, the sealing cap of this application can withstand higher internal bottle pressures, up to 1.2 MPa, facilitating the transportation and storage of beverages, improving the sealing of beverages, and enhancing the quality of beverages. In particular, the opening sound increases with the friction between the sealing assembly and the inner wall of the bottle mouth and the increase in internal bottle pressure, further enhancing the positive emotional feedback, sense of accomplishment, and satisfaction experienced by the user at the moment of opening the bottle. This enhances the drinker's experience and enjoyment of both the drinking atmosphere and the dining atmosphere during a gathering. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the crown-shaped bottle cap of the present invention;

[0019] Figure 2 A cross-sectional view of a crown bottle cap according to an embodiment of the present invention;

[0020] Figure 3 for Figure 2 A magnified view of middle A;

[0021] Figure 4 A cross-sectional view of a crown bottle cap according to another embodiment of the present invention;

[0022] Figure 5 A cross-sectional view of a crown bottle cap according to another embodiment of the present invention;

[0023] Figure 6 A cross-sectional view of a crown bottle cap according to another embodiment of the present invention;

[0024] Figure 7 This is a cross-sectional view of a crown bottle cap according to another embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Cover body; 2. Sealing assembly; 3. Transition ring; 4. Retention gap; 5. Deformation gap; 11. Base; 12. Sidewall; 13. Skirt teeth; 14. Skirt edge; 15. Skirt edge; 20. Sealing cavity; 21. Pressure pad; 22. Sealing inner ring; 23. Sealing groove; 24. Sealing outer ring; 25. Support rib; 26. Pressurizing ring; 27. Tightening ring; 31. Convex side;

[0027] 111. Upper surface of the base; 112. Lower surface of the base; 211. Upper surface of the pressure pad; 212. Lower surface of the pressure pad; 221. Upper surface of the sealing inner ring; 222. Lower surface of the sealing inner ring; 223. Inner wall of the sealing inner ring; 224. Outer wall of the sealing inner ring; 231. Upper surface of the sealing groove; 232. Lower surface of the sealing groove; 241. Upper surface of the sealing outer ring; 242. Lower surface of the sealing outer ring; 223. Inner wall of the sealing outer ring; 244. Outer wall of the sealing outer ring;

[0028] a, top inner diameter; b, top outer diameter; c, bottom inner diameter; d, bottom outer diameter; e, height of the inner sealing ring. Specific embodiments

[0029] To make the objectives, technical solutions and advantages of the present utility model clearer, the following will further describe in detail the embodiments of the present utility model with reference to the accompanying drawings.

[0030] To solve the problem that the pressure-bearing capacity of the existing packaging caps is generally low, about 0.8 MPa, the present utility model provides a crown-shaped bottle cap with a sealing assembly, which can withstand a pressure of up to 1.2 MPa, increasing the scope of use of the crown-shaped bottle cap. At the same time, with the help of the relatively large pressure inside the bottle, it is more labor-saving to open the bottle cap. While the pressure-bearing capacity increases, the vibration at the moment of opening the bottle cap also increases, thus generating sounds such as "BANG" and "BONG", and further enabling the opener to enjoy positive emotional feedback and a sense of achievement at the moment of opening the bottle cap, endowing the action of opening the bottle cap with a sense of ceremony. The specific solution is as Figure 1-7 shown, a crown-shaped bottle cap provided by the present utility model, wherein Figure 1 is a schematic structural view of the crown-shaped bottle cap of the present utility model; Figure 2 is a cross-sectional view of the crown-shaped bottle cap according to an embodiment of the present utility model; Figure 3 is Figure 2 an enlarged view of A in Figure 4 is a cross-sectional view of the crown-shaped bottle cap according to another embodiment of the present utility model; Figure 5 is a cross-sectional view of the crown-shaped bottle cap according to still another embodiment of the present utility model; Figure 6 is a cross-sectional view of the crown-shaped bottle cap according to still another embodiment of the present utility model; Figure 7 is a cross-sectional view of the crown-shaped bottle cap according to still another embodiment of the present utility model.

[0031] The above-mentioned crown-shaped bottle cap includes a cap body 1 and a sealing assembly 2, that is Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 respectively show cross-sectional views of the cap body 1 with different sealing assemblies 2 fitted therein. As Figure 1-7 shown, the cap body 1 includes a base body 11 and a side wall 12. After the base body 11 and the side wall 12 enclose, a crown-shaped bottle cap body with an opening at the bottom is formed. In actual application, the opening can be covered downward on the corresponding bottle mouth.

[0032] Furthermore, skirt teeth 13 for engaging with the bottle mouth are provided around the side wall 12. The skirt teeth 13 can engage with the corresponding position at the outer diameter of the bottle mouth to realize the cooperation between the cap body 1 and the bottle mouth.

[0033] Furthermore, asFigure 1-7 The shown sealing assembly 2 is arranged inside the cap body 1. After the cap body 1 is capped with the bottle mouth, the sealing assembly 2 is in contact with the bottle mouth, and the sealing assembly 2 can completely block the gap between the cap body 1 and the bottle mouth to seal the bottle mouth and maintain the pressure inside the bottle.

[0034] Further, the sealing assembly 2 includes a sealing cavity 20, a sealing groove 23 and a sealing outer ring 24 which are coaxially arranged with the base body 11. As Figure 2-7 shown, the space formed by enclosing the sealing cavity 20, the pressing gasket and the sealing outer ring 24 is used to accommodate the bottle mouth. In practical applications, the sealing cavity 20 extends into the inner wall of the bottle mouth and fits with it, the upper edge of the bottle mouth with thickness fits with the pressing gasket, and the outer wall of the bottle mouth fits with the sealing outer ring 24 to achieve effective sealing of the bottle mouth.

[0035] Further, as Figure 2-7 shown, the above-mentioned sealing cavity 20 includes a pressure-bearing gasket 21 and a sealing inner ring 22. The upper surface of the pressure-bearing gasket 21 fits with the lower surface 112 of the base body and is coaxially arranged. In the figure, the upper surface 111 of the base body is the outer wall of the base body 11. The sealing inner ring 22 surrounds and fits with the outer edge of the pressure-bearing gasket 21 and is coaxially arranged with the pressure-bearing gasket 21. The top of the sealing inner ring 22 fits with the lower surface 112 of the base body, and the bottom of the sealing inner ring 22 extends in the direction opposite to that of the base body 11. That is, the upper surface 221 of the sealing inner ring fits with the lower surface 112 of the base body, and the lower surface 222 of the sealing inner ring extends in the direction opposite to that of the base body 11.

[0036] As Figure 2-7 shown, the sealing inner ring 22 is a ring structure with thickness. The length range of the inner diameter a at the top of the sealing inner ring 22 is between 10 mm and 21.8 mm, and the length range of the outer diameter b at the top of the sealing inner ring 22 is between 15 mm and 22 mm; the length range of the inner diameter c at the bottom of the sealing inner ring 22 of the sealing inner ring 22 is between 10 mm and 21.8 mm, and the length range of the outer diameter d at the bottom of the sealing inner ring 22 is between 15 mm and 21.8 mm. The above four parameters of the inner diameter a at the top, the outer diameter b at the top, the inner diameter c at the bottom and the outer diameter d at the bottom of the sealing inner ring 22 determine the wall thickness of the sealing inner ring 22. By adjusting the wall thicknesses of the sealing inner ring 22 and the sealing outer ring 24, the amplitude of vibration generated by the sealing inner ring 22 and the sealing outer ring 24 at the moment of opening the crown cap can be effectively controlled, and then the opening sound effect can be controlled.

[0037] As Figure 2 shown, in an embodiment of the present application, the length of the inner diameter a at the top of the sealing inner ring 22 of the crown cap is 15.8 mm, and the length of the outer diameter b at the top of the sealing inner ring 22 is 17.8 mm; the length of the inner diameter c at the bottom of the sealing inner ring 22 is 15.8 mm, and the length of the outer diameter d at the bottom of the sealing inner ring 22 is 17 mm.

[0038] As Figure 4 shown, in an embodiment of the present application, the length of the top inner diameter a of the sealing inner ring 22 of the crown cap is 12.9 mm, and the length of the top outer diameter b of the sealing inner ring 22 is 17.8 mm; the length of the bottom inner diameter c of the sealing inner ring 22 is 15.8 mm, and the length of the bottom outer diameter d of the sealing inner ring 22 is 17 mm.

[0039] As Figure 5 shown, in an embodiment of the present application, the length of the top inner diameter a of the sealing inner ring 22 of the crown cap is 15.8 mm, and the length of the top outer diameter b of the sealing inner ring 22 is 17.8 mm; the length of the bottom inner diameter c of the sealing inner ring 22 is 15.8 mm, and the length of the bottom outer diameter d of the sealing inner ring 22 is 17 mm.

[0040] As Figure 6 shown, in an embodiment of the present application, the length of the top inner diameter a of the sealing inner ring 22 of the crown cap is 12.9 mm, and the length of the top outer diameter b of the sealing inner ring 22 is 17.8 mm; the length of the bottom inner diameter c of the sealing inner ring 22 is 15.8 mm, and the length of the bottom outer diameter d of the sealing inner ring 22 is 17 mm.

[0041] Preferably, the pressure-bearing pad 21 described above is a flexible pad with a uniform thickness.

[0042] Preferably, the sealing inner ring 22, the sealing outer ring 24, and the sealing groove 23 described above are all made of flexible materials.

[0043] More preferably, the pressure-bearing pad 21 and the sealing inner ring 22 described above are integrally formed.

[0044] More preferably, the pressure-bearing pad 21, the sealing inner ring 22, and the sealing groove 23 described above are integrally formed.

[0045] More preferably, the pressure-bearing pad 21, the sealing inner ring 22, the sealing groove 23, and the sealing outer ring 24 described above are all integrally formed.

[0046] More preferably, in some embodiments, the height of the sealing inner ring 22 extending downward along the axis of the base body 11 is not greater than the height of the skirt tooth edge 15.

[0047] Preferably, the sealing inner ring 22 described above is continuously arranged circumferentially around the pressure-bearing pad 21, and the outer side wall 224 of the sealing inner ring is an arc surface.

[0048] More preferably, the sealing inner ring 22 described above is continuously arranged circumferentially around the pressure-bearing pad 21, and the outer side wall 224 of the sealing inner ring is composed of a vertical wall surface of two-thirds at the top and an arc surface of one-third at the bottom.

[0049] In practical applications, the outer side wall 224 of the inner sealing ring is in contact and cooperation with the inner wall of the bottle mouth. When the bottle cap is closed, the outer side wall 224 of the inner sealing ring is closely attached to the inner wall of the bottle mouth. At this time, the pressure inside the bottle is mainly confined within the sealing cavity 20. When the bottle cap is opened, the outer side wall 224 of the inner sealing ring and the inner wall of the bottle mouth will generate relatively large vibrations under the action of friction, and thus sounds such as "BANG" and "BONG" will occur.

[0050] As Figure 6 shown, the sealing cavity 20 further includes support ribs 25. A plurality of support ribs 25 are symmetrically arranged around the axis of the base body 11, and each support rib 25 is arranged in contact with the inner side wall 12 of the inner sealing ring 22 and the lower surface of the base body 11. For example, the number of support ribs 25 can be set to 2, 3, 4, etc. The specific number needs to be selected according to the actual situation. In this embodiment, the number of support ribs 25 is 4, and the 4 support ribs 25 are symmetrically arranged around the axis of the base body 11.

[0051] Furthermore, the inner side surface of the sealing groove 23 is arranged in contact with the outer side wall 224 of the inner sealing ring. A retention gap 4 is provided between the outer side surface of the sealing groove 23 and the side wall 12, that is, the sealing groove 23 does not contact the side wall 12. Such a setting can provide space for the radial deformation of the sealing groove 23. The upper surface 231 of the sealing groove is arranged in contact with the lower surface 112 of the base body, and the lower surface 232 of the sealing groove is used to contact the bottle mouth.

[0052] Preferably, the lower surface 232 of the sealing groove is a flat surface.

[0053] More preferably, the lower surface 232 of the sealing groove is a downwardly convex arc surface. The downwardly convex arc surface can provide a deformation margin when making a pressing fit with the bottle mouth, and thus ensure that after the cover body 1 is properly buckled with the bottle mouth, the sealing groove 23 is in close contact with the bottle mouth without gaps, so as to better improve the sealing and pressure-bearing effect.

[0054] Furthermore, the outer diameter length range of the sealing groove 23 is between 21 mm and 24.8 mm, and preferably 22 mm.

[0055] Even further, as Figure 5 shown, the outer sealing ring 24 is arranged in the retention gap 4. The upper surface 241 of the outer sealing ring is arranged in contact with the lower surface 112 of the base body, and the lower surface 242 of the outer sealing ring extends downward along the axis of the base body 11. The inner side wall 243 of the outer sealing ring is arranged in contact with the outer side surface of the sealing groove 23, and a deformation gap 5 is formed between the outer side wall 244 of the outer sealing ring and the side wall 12. Setting the deformation gap 5 can provide space for the radial deformation of the outer sealing ring 24.

[0056] In some preferred embodiments, the lower surface 242 of the outer sealing ring 24 of the above is flush with the lower surface 232 of the sealing groove 23.

[0057] Preferably, the height range of the above-mentioned sealing inner ring 22 extending downward along the axis of the base body 11 is between 1.5 and 6 mm. For example, the height e of the sealing inner ring can be 2.5 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm. By adjusting the height of the sealing inner ring 22, the amplitude of the vibration generated after the sealing inner ring 22 separates from the inner wall of the bottle mouth at the moment of opening the crown cap can be effectively controlled, thereby controlling the sound effects of "BANG" and "BONG" generated during opening.

[0058] Further, as Figure 1-7 shown, a plurality of the above-mentioned skirt teeth 13 are provided, and each skirt tooth 13 forms a protrusion toward the axis direction of the base body 11, and a skirt edge 14 is formed between two adjacent skirt teeth 13. The side wall 12, the skirt teeth 13 and the skirt edge 14 enclose to form a skirt tooth edge 15, and the skirt tooth edge 15 is engaged with the outer wall of the bottle mouth. Specifically, the skirt teeth 13 are engaged with the bosses (outer diameter of the bottle mouth) at corresponding positions on the outer wall of the bottle mouth.

[0059] Further, as Figure 1 shown, the bottom ends of the above-mentioned respective skirt teeth 13 are all on the first circumference, the bottom ends of the respective skirt edges 14 are all on the second circumference, and the diameter of the second circumference is greater than the diameter of the first circumference.

[0060] Further, as Figure 2 shown, a pressure increasing ring 26 is further provided in the above-mentioned sealing cavity 20. The pressure increasing ring 26 is arranged coaxially with the base body 11, and the pressure increasing ring 26 is attached to the inner side wall 223 of the sealing inner ring and the lower surface of the pressure bearing pad 21. By providing the pressure increasing ring 26, the pressure storage capacity of the sealing cavity 20 is enhanced. As Figure 2 shown, in an embodiment of the present application, the inner diameter length of the pressure increasing ring 26 of the crown cap is 13.8 mm.

[0061] Further, as Figure 1-7 shown, the cap body 1 further includes a transition ring 3. The transition ring 3 is used to connect the base body 11 and the side wall 12, and the side of the transition ring 3 facing outside the cap body 1 is an outward convex side 31. By providing the arc-shaped transition ring 3 with outward convex and inward concave, the deformation gap 5 can be increased, and better space can be provided for the deformation of the sealing outer ring 24, so as to facilitate the crown cap to bear greater pressure.

[0062] Further, as Figure 7 shown, a tightening ring 27 is further provided at the lower end of the above-mentioned sealing inner ring 22. The thickness of the tightening ring 27 is less than the thickness of the lower end of the sealing inner ring 22. Since the thickness of the tightening ring 27 is small, that is, the outer diameter of the tightening ring 27 is generally slightly smaller than the inner diameter of the bottle mouth, it can be used to guide the sealing inner ring 22 to be smoothly inserted into the inside of the bottle mouth.

[0063] As Figure 7As shown, in one embodiment of the present application, the outer diameter of the tightening ring 27 of the crown cap is 16.4 mm.

[0064] The crown-shaped bottle cap provided by the utility model also has the following beneficial effects:

[0065] By refining the structure of the cap body 1 and rationally configuring the structure and dimensions of the sealing assembly 2, the sealing cap of the present application can withstand higher internal bottle pressures, up to 1.2 MPa, facilitating the transportation and storage of beverages, improving the sealing of the beverages, and enhancing product quality. In particular, the opening sound increases with the friction between the sealing assembly and the inner wall of the bottle mouth and the increase in internal bottle pressure, producing a "bang" or "bang" sound, thereby further providing positive emotional feedback, a sense of accomplishment, and satisfaction at the moment of opening. When opening a beverage bottle cap at a dinner party, this enhances the drinker's experience of both the drinking atmosphere and the dining atmosphere, and gives the act of opening the bottle cap a sense of ritual.

[0066] It is understood from common technical knowledge that the present invention may be implemented through other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A crown bottle cap with a novel sealing component, characterized in that, It includes a cap body (1) and a sealing component (2). The cap body (1) includes a base body (11) and a side wall (12). After the base body (11) and the side wall (12) enclose, a crown-shaped cap body with an opening at the bottom is formed. The opening faces downward and covers the bottle mouth. A skirt tooth (13) engaged with the bottle mouth is provided around the side wall (12). The sealing component (2) is arranged inside the cap body (1). After the cap body (1) covers the bottle mouth, the sealing component (2) abuts against the bottle mouth, and is used for sealing the bottle mouth, maintaining the pressure inside the bottle and increasing the friction force with the inner wall of the bottle mouth. The sealing component (2) includes a sealing cavity (20), a sealing groove (23) and a sealing outer ring (24) coaxially arranged with the base body (11). The space formed by enclosing the sealing cavity (20), the sealing groove (23) and the sealing outer ring (24) is used for accommodating the bottle mouth.

2. The crown cap according to claim 1, characterized in that, The sealing cavity (20) includes a pressure-bearing pad (21) and a sealing inner ring (22). The pressure-bearing pad (21) is attached to and coaxially arranged with the base body (11); the sealing inner ring (22) surrounds the outer edge of the pressure-bearing pad (21) and is coaxially arranged with it. The top of the sealing inner ring (22) is attached to the lower surface (111) of the base body, and the bottom extends in the opposite direction of the base body (11). The outer side wall (224) of the sealing inner ring cooperates with the inner wall of the bottle mouth.

3. The crown cap according to claim 2, wherein, The inner diameter (a) of the top of the sealing inner ring (22) ranges from 10 mm to 21.8 mm, and the outer diameter (b) of the top ranges from 15 mm to 22 mm; the inner diameter (c) of the bottom of the sealing inner ring (22) ranges from 10 mm to 21.8 mm, and the outer diameter (d) of the bottom ranges from 15 mm to 21.8 mm.

4. The crown cap according to any one of claims 1-3, characterized in that, The sealing cavity (20) further includes support ribs (25), and a plurality of the support ribs (25) are symmetrically arranged around the axis of the base body (11).

5. The crown cap according to claim 4, characterized in that, The sealing cavity (20) includes a pressure-bearing pad (21) and a sealing inner ring (22). The sealing groove (23) is attached to the sealing inner ring (22) and there is a retention gap (4) between it and the side wall (12). The sealing outer ring (24) is arranged in the retention gap (4), and a deformation gap (5) is formed between the sealing outer ring (24) and the side wall (12).

6. The crown cap according to claim 5, characterized in that, The height of the sealing inner ring (22) extending downward along the axis of the base body (11) ranges from 1.5 to 6 mm.

7. The crown cork according to claim 6, characterized in that, A pressure-increasing ring (26) is further arranged in the sealing cavity (20). The pressure-increasing ring (26) is coaxially arranged with the base body (11), and the pressure-increasing ring (26) is attached to the inner side wall (223) of the sealing inner ring and the lower surface (212) of the pressure-bearing pad, and is used for enhancing the pressure storage capacity of the sealing cavity (20).

8. The crown cap according to claim 7, characterized in that, The cap body (1) further includes a transition ring (3). The transition ring (3) is used for connecting the base body (11) and the side wall (12), and the side of the transition ring (3) facing outside the cap body (1) is an outward convex side (31).

9. The crown cap according to claim 8, characterized in that, The lower end of the sealing inner ring (22) is provided with a tightening ring (27). The thickness of the tightening ring (27) is smaller than the thickness of the lower end of the sealing inner ring (22), and is used to guide the sealing inner ring (22) to be smoothly inserted into the inside of the bottle mouth.

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