Pull ring cover with novel sealing assembly

Abstract

The utility model discloses a pull ring cover with a novel sealing assembly, which is characterized by comprising a cover body, a pull ring and the sealing assembly. The cap body comprises a base body and a side wall, a pull ring 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; one end of the pull ring is a connecting end connected with the side wall, and the other end of the pull ring is a lifting end; 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 bottle opening. The structure of the cap body is refined, and the pull ring is arranged, so that the bottle cap is more labor-saving to open, the structure and the size of the sealing assembly are reasonably set, the sealing cap can bear higher bottle internal pressure which can reach 1.0 MPa, and the product quality is improved. Particularly, the opening sound effect is 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 opening satisfaction and happiness can be improved.

Description

Technical Field

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

[0002] Existing bottle caps with sealing properties often require external instruments to open the bottle caps because the bottle caps do not have pull rings, making it inconvenient to open the bottle caps. In addition, because the structure and sealing structure of the existing bottle caps are too small, the pressure resistance of the bottle caps can only reach about 0.6MPa. The pressure inside the bottle that can be used when opening is relatively small. Correspondingly, the force required by the opener is relatively large, resulting in difficulty in opening. On the other hand, due to the low pressure resistance of the bottle caps, the decibel level of the sound produced during the bottle cap opening process is also low, which fails to provide the opener with clear emotional positive feedback, a sense of accomplishment, and satisfaction at the moment of opening. As a bottle cap for drinks at dinner parties, it fails to enhance the drinking atmosphere and dining atmosphere of the drinks. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the utility model provides a pull ring cover, comprising a cover body (1), a pull ring (3) and a sealing assembly (2).

[0004] The cover body (1) comprises a base (11) and a side wall (12), wherein the base (11) and the side wall (12) are enclosed to form a pull ring cover body with an opening at the bottom, and the opening is downwardly facing to cover the bottle mouth;

[0005] A pull ring (3), one end of which is a connecting end (31), the connecting end (31) is connected to the side wall (12), and the other end is a pulling end (32);

[0006] The sealing component (2) is arranged inside the cap body (1). After the cap 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 cap body (2) and the inner wall of the bottle mouth.

[0007] Furthermore, in some embodiments, a first notch (13) and a second notch (14) are provided on the side wall (12), and the first notch (13) and the second notch (14) are symmetrically arranged on both sides of the connecting end (31), providing a tearing entry point for the pull ring (3).

[0008] Furthermore, in some embodiments, a first groove line (15) and a second groove line (16) are provided on the cover body (1), the first groove line (15) is connected to the first notch (13), and the second groove line (16) is connected to the second notch (14), and when the pull ring (3) is lifted, a crack is formed along the first groove line (15) and the second groove line (16).

[0009] Further, in some embodiments, the sealing assembly (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 to accommodate the bottle mouth.

[0010] Further, in some embodiments, 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 therewith. 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 direction opposite to the base body (11). The sealing inner ring (22) extends downward along the axis of the base body (11), and the height (e) value of the sealing inner ring ranges between 1.5 - 6 mm.

[0011] Further, in some embodiments, the inner diameter (a) length range of the top of the sealing inner ring (22) is between 10 mm and 21.8 mm, and the outer diameter (b) length range of the top is between 15 mm and 22 mm; the inner diameter (c) length range of the bottom of the sealing inner ring (22) is between 10 mm and 21.8 mm, and the outer diameter (d) length range of the bottom is between 15 mm and 21.8 mm.

[0012] 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).

[0013] Further, in some embodiments, the sealing groove (23) is attached to 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).

[0014] Further, in some embodiments, a pressure-boosting ring (26) is further arranged in the sealing cavity (20). The pressure-boosting ring (26) is coaxially arranged with the base body (11), and the pressure-boosting 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, so as to enhance the pressure storage capacity of the sealing cavity (20).

[0015] Furthermore, in some embodiments, a tightening ring (27) is provided at the lower end of the sealing inner ring (22), and 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 bottle mouth.

[0016] The pull ring cover provided by the utility model also has the following beneficial effects:

[0017] By refining the structure of the cap body and providing a pull ring, the bottle cap is made easier to open. Furthermore, by rationally designing the structure and dimensions of the sealing assembly, the sealing cap of the present application can withstand higher internal bottle pressures, up to 1.0 MPa. This facilitates the transportation and storage of beverages, improves the sealing of the beverages, and enhances 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, further enhancing the positive emotional feedback, sense of accomplishment, and satisfaction experienced by the user at the moment of opening the bottle. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic structural diagram of the pull ring cover of the present utility model;

[0019] Figure 2 A cross-sectional view of a pull ring cover 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 pull ring cover according to another embodiment of the present invention;

[0022] Figure 5 A cross-sectional view of a pull ring cover according to another embodiment of the present invention;

[0023] Figure 6 A cross-sectional view of a pull ring cover according to another embodiment of the present invention;

[0024] Figure 7 This is a cross-sectional view of a pull ring cover according to another embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Cover body; 2. Sealing assembly; 3. Pull ring; 4. Retention gap; 5. Deformation gap; 6. Transition ring;

[0027] 11. Base; 12. Sidewall; 13. First notch; 14. Second notch; 15. First groove line; 16. Second groove line;

[0028] 20. Sealing cavity; 21. Pressure-bearing pad; 22. Inner sealing ring; 23. Sealing groove; 24. Outer sealing ring; 25. Support rib; 26. Booster ring; 27. Tightening ring; 31. Connection end; 32. Lifting end; 61. Outer convex side; 111. Upper surface of the base; 112. Lower surface of the base; 211. Upper surface of the pressure-bearing pad; 212. Lower surface of the pressure-bearing pad; 221. Upper surface of the inner sealing ring; 222. Lower surface of the inner sealing ring; 223. Inner side wall of the inner sealing ring; 224. Outer side wall of the inner sealing ring; 231. Upper surface of the sealing groove; 232. Lower surface of the sealing groove; 241. Upper surface of the outer sealing ring; 242. Lower surface of the outer sealing ring; 224. Inner side wall of the outer sealing ring; 244. Outer side wall of the outer sealing ring.

[0029] a. Inner diameter at the top; b. Outer diameter at the top; c. Inner diameter at the bottom; d. Outer diameter at the bottom; e. Height of the inner sealing ring. Detailed implementation manner

[0030] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the implementation manners of the present utility model in detail with reference to the accompanying drawings.

[0031] To solve the problem that in the prior art, opening a packaging lid often requires external force, in this utility model, by providing a pull ring, the operator can directly lift the pull ring upwards to easily open the bottle cap. Additionally, in the prior art, the pressure-bearing capacity of packaging lids is generally low, about 0.6 MPa. To address this problem, the present utility model provides a pull-ring lid with a sealing component that can withstand a pressure of up to 1.0 MPa, expanding the scope of use of the pull-ring lid. At the same time, by leveraging the relatively large pressure inside the bottle, it makes it 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, allowing the operator to enjoy positive emotional feedback at the moment of opening the bottle cap and thus obtaining a sense of achievement, endowing the action of opening the bottle cap with a sense of ceremony. The specific solution is as Figure 1-7 shown, a pull-ring lid provided by the present utility model, where Figure 1 is the structural schematic diagram of the pull-ring lid of the present utility model; Figure 2 is the cross-sectional view of the pull-ring lid of an embodiment of the present utility model; Figure 3 is Figure 2 the enlarged view of A in Figure 4 is the cross-sectional view of the pull-ring lid of another embodiment of the present utility model; Figure 5 is the cross-sectional view of the pull-ring lid of still another embodiment of the present utility model; Figure 6 is the cross-sectional view of the pull-ring lid of still another embodiment of the present utility model; Figure 7 is the cross-sectional view of the pull-ring lid of still another embodiment of the present utility model.

[0032] Specifically, the pull-ring cap of the present utility model includes a cap body 1, a pull ring 3, and a sealing assembly 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 pull-ring cap body with an opening at the bottom is formed, and the opening faces downward and is covered on the bottle mouth. In practical applications, it can be covered on the corresponding bottle mouth with the opening facing downward.

[0033] Specifically, for the above-mentioned pull ring 3, one end is a connection end 31, and the connection end 31 is connected to the side wall 12. The other end of the pull ring 3 is a lifting end 32. In practical applications, the operator lifts the pull ring 3 upward to open the bottle cap.

[0034] Specifically, as Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 respectively show cross-sectional views of different sealing assemblies 2 fitted inside the cap body 1. The above-mentioned sealing assembly 2 is provided inside the cap body 1. After the cap body 1 is covered on the bottle mouth, the sealing assembly 2 abuts against the bottle mouth to seal the bottle mouth and maintain the pressure inside the bottle.

[0035] Furthermore, as Figure 1-7 shown, the above-mentioned side wall 12 is provided with a first notch 13 and a second notch 14. The first notch 13 and the second notch 14 are symmetrically arranged on both sides of the connection end 31 of the pull ring 3. Since both the first notch 13 and the second notch 14 are weak connection points, they can provide a tear entry point for the pull ring 3 during the upward lifting process.

[0036] Furthermore, as Figure 1 shown, the cap body 1 is provided with a first groove line 15 and a second groove line 16. The first groove line 15 connects the first notch 13, and the second groove line 16 connects the second notch 14. Both the first groove line 15 and the second groove line 16 are weak connection groove lines on the cap body 1. After the pull ring 3 is lifted upward, it is first torn through the first notch 13 and the second notch 14, and then the tear line can continuously form a crack along the first groove line 15 and the second groove line 16, finally opening the bottle cap.

[0037] Furthermore, the sealing assembly 2 includes a sealing cavity 20, a sealing groove 23, and a sealing outer ring 24 that are coaxially arranged with the base body 11. As Figure 2-7 shown, the space formed by the mutual enclosure of the sealing cavity 20, the sealing groove 23, 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 a certain thickness fits with the sealing groove 23, and the outer wall of the bottle mouth fits with the sealing outer ring 24 to achieve effective sealing of the bottle mouth.

[0038] Furthermore, as Figure 2-7As shown, the above-mentioned sealing cavity 20 includes a pressure-bearing pad 21 and a sealing inner ring 22. The upper surface of the pressure-bearing pad 21 is fitted and coaxially arranged with the lower surface 112 of the base body. In the figure, the upper surface 111 of the base body is the outer side wall of the base body 11. The sealing inner ring 22 surrounds and fits the outer edge of the pressure-bearing pad 21 and is coaxially arranged with the pressure-bearing pad 21. The top of the sealing inner ring 22 is fitted with the lower surface 112 of the base body, and the bottom of the sealing inner ring 22 extends in a direction opposite to that of the base body 11. That is, the upper surface 221 of the sealing inner ring is fitted with the lower surface 112 of the base body, and the lower surface 222 of the sealing inner ring extends in a direction opposite to that of the base body 11.

[0039] As Figure 2-7 shown, the sealing inner ring 22 is a ring structure with a 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 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 arm 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 the vibration generated by the sealing inner ring 22 and the sealing outer ring 24 at the moment when the pull-ring lid is opened can be effectively controlled, thereby controlling the opening sound effect.

[0040] 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 pull-ring lid 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.

[0041] As Figure 4 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 pull-ring lid is 12.9 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.

[0042] As Figure 5 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 pull-ring lid 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.

[0043] As Figure 6As 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 pull-ring cap is 12.9 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.

[0044] Preferably, the pressure-bearing pad 21 described above is a flexible pad with a uniform thickness.

[0045] Preferably, the sealing inner ring 22, the sealing outer ring 24, and the sealing groove 23 described above are all made of flexible materials.

[0046] More preferably, the pressure-bearing pad 21 and the sealing inner ring 22 described above are integrally formed.

[0047] More preferably, the pressure-bearing pad 21, the sealing inner ring 22, and the sealing groove 23 described above are integrally formed.

[0048] 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.

[0049] More preferably, in some embodiments, the height of the sealing inner ring 22 extending downward along the axis of the base 11 is not greater than the height of the side wall 12.

[0050] Preferably, the sealing inner ring 22 is continuously arranged around the circumference of the pressure-bearing pad 21, and the outer side wall 224 of the sealing inner ring is an arc surface.

[0051] More preferably, the sealing inner ring 22 is continuously arranged around the circumference of 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.

[0052] In practical applications, the outer side wall 224 of the sealing inner 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 sealing inner ring closely adheres to the inner wall of the bottle mouth. At this time, the pressure inside the bottle is mainly confined in the sealing cavity 20. When the bottle cap is opened, the outer side wall 224 of the sealing inner ring and the inner wall of the bottle mouth will generate relatively large vibrations under the action of friction, and thus there will be sound effects such as "BANG" and "BONG".

[0053] 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 11, and each support rib 25 is arranged in contact with the inner side wall 12 of the sealing inner ring 22 and the lower surface of the base 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 11.

[0054] Further, 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 retaining 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.

[0055] Preferably, the lower surface 232 of the sealing groove is a flat surface.

[0056] 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 allowance when making a pressing fit with the bottle mouth, thereby ensuring 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 pressure-bearing effect.

[0057] Further, the outer diameter length of the sealing groove 23 ranges between 22 mm and 22.14 mm, preferably 22.14 mm.

[0058] Further, the height of the sealing groove 23 extending downward along the axis of the base body 11 is greater than the height of the pressure-bearing pad 21, and the height range of the sealing groove 23 extending downward along the axis of the base body 11 is between 0.4 mm and 0.6 mm.

[0059] Even further, as Figure 5 shown, the outer sealing ring 24 is arranged in the retaining gap 4. The upper surface 241 of the outer sealing ring is arranged in contact with the lower surface 112 of the base body. The inner side wall 243 of the outer sealing ring is arranged in contact with the outer side surface of the sealing groove 23. 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.

[0060] In some preferred embodiments, the lower surface 242 of the outer sealing ring of the above-mentioned outer sealing ring 24 is flush with the lower surface 232 of the sealing groove of the sealing groove 23.

[0061] Preferably, the height range of the above-mentioned inner sealing 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 inner sealing ring can be 1.5 mm, 2.5 mm, 3.5 mm, 4.5 mm, 5 mm. By adjusting the height of the outer and inner sealing rings, the amplitude of the vibration generated after the inner sealing ring 22 disengages from the inner wall of the bottle mouth at the moment of opening the crown cap can be effectively controlled, and thus the sound effects of "BANG" and "BONG" generated during opening can be controlled.

[0062] Further, as Figure 2As shown, a pressure - increasing ring 26 is further provided in the above - mentioned sealing cavity 20. The pressure - increasing ring 26 is coaxially arranged with the base body 11, and the pressure - increasing ring 26 is in contact with 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 - storing 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 pull - ring cover pressure - increasing ring 26 is 13.8 mm.

[0063] Furthermore, as Figure 1-7 shown, the cover body 1 further includes a transition ring 6. The transition ring 6 is used to connect the base body 11 and the side wall 12, and the side of the transition ring 6 facing outside the cover body 1 is the convex side 61. By providing the arc - shaped transition ring 6 with convex - outside and concave - inside, the deformation gap 5 can be increased, providing better space for the deformation of the sealing outer ring 24, so as to facilitate the pull - ring cover to bear greater pressure.

[0064] Furthermore, 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.

[0065] As Figure 7 shown, in an embodiment of the present application, the outer diameter length of the tightening ring 27 of the pull - ring cover is 16.4 mm.

[0066] The pull - ring cover provided by the present utility model further has the following beneficial effects:

[0067] By refining the structure of the cover body 1 and providing the pull - ring 3, it makes the opening of the bottle cap more labor - saving. And by reasonably setting the structure and size of the sealing component 2, the sealing cover of the present application can withstand a higher internal pressure of the bottle, up to 1.0 MPa, which is convenient for the transportation and storage of beverages and improves the sealing performance of beverages. In addition, the opening sound effect will increase with the friction between the sealing component and the inner wall of the bottle mouth and the increase of the internal pressure of the bottle, generating sounds such as "BANG" and "BONG", thereby further obtaining positive emotional feedback, a sense of achievement and satisfaction at the moment of opening. When opening the beverage bottle cap during a dinner, it enhances the experience of the drinking atmosphere and the dinner atmosphere of the drinker, and endows the action of opening the bottle cap with a sense of ceremony.

[0068] As is known by common technical knowledge, the present utility model can be implemented by other embodiments that do not depart from its spiritual essence or essential features. Therefore, the above - disclosed embodiments are illustrative in all aspects and are not the only ones. All changes within the scope of the present utility model or within the scope equivalent to the present utility model are encompassed by the present utility model.

Claims

1. A pull-tab lid with a novel sealing component, characterized in that, It includes a cap body (1), a pull ring (3) and a sealing assembly (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 pull-ring cap body with an opening at the bottom is formed, and the opening faces downward and covers the bottle mouth. One end of the pull ring (3) is a connecting end (31), and the connecting end (31) is connected to the side wall (12), and the other end is a lifting end (32). The sealing assembly (2) is arranged inside the cap body (1). After the cap body (1) covers the bottle mouth, the sealing assembly (2) abuts against the bottle mouth, is used to seal the bottle mouth, maintain the pressure inside the bottle and increase the friction with the inner wall of the bottle mouth. The sealing assembly (2) includes a sealing cavity (20), a sealing groove (23) and a sealing outer ring (24) that are 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 to accommodate the bottle mouth.

2. The pull-tab lid according to claim 1, wherein, A first notch (13) and a second notch (14) are provided on the side wall (12). The first notch (13) and the second notch (14) are symmetrically arranged on both sides of the connecting end (31), providing a tear entry point for the pull ring (3).

3. The pull-tab lid according to claim 2, characterized in that, A first groove line (15) and a second groove line (16) are provided on the cap body (1). The first groove line (15) connects the first notch (13), and the second groove line (16) connects the second notch (14). After the pull ring (3) is lifted, a crack is formed along the first groove line (15) and the second groove line (16).

4. The pull-tab lid according to claim 2 or 3, 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 direction opposite to the base body (11). The sealing inner ring (22) extends downward along the axis of the base body (11), and the value range of the height (e) of the sealing inner ring is between 1.5 - 6 mm.

5. The pull-tab lid according to claim 4, characterized in that, The inner diameter (a) of the top of the sealing inner ring (22) has a length range between 10 mm - 21.8 mm, and the outer diameter (b) of the top has a length range between 15 mm - 22 mm; the inner diameter (c) of the bottom of the sealing inner ring (22) has a length range between 10 mm - 21.8 mm, and the outer diameter (d) of the bottom has a length range between 15 mm - 21.8 mm.

6. The pull-tab lid according to claim 5, wherein, 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).

7. The pull-tab lid according to claim 6, characterized in that, 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).

8. The pull-tab lid according to claim 7, wherein, A pressure-increasing ring (26) is further provided 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 in contact with the inner side wall (223) of the sealing inner ring and the lower surface (212) of the pressure-bearing pad, so as to enhance the pressure storage capacity of the sealing cavity (20).

9. The pull-tab lid according to claim 8, characterized in that, A tightening ring (27) is provided at the lower end of the sealing inner ring (22). 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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