Center top-open type container sealing cover

Abstract

The invention discloses a center top-open type container sealing cover, and belongs to the technical field of container sealing covers, the center top-open type container sealing cover comprises a top piece structure, the top piece structure comprises a first top piece and a second top piece, a top groove is formed in the center connecting position of the first top piece and the second top piece, and a first top penetrating line is arranged between the top groove and the first top piece and between the top groove and the second top piece; and a second top threading line is arranged at the joint of the first top sheet and the second top sheet. The first top sheet and the second top sheet are top openings of the sealing cover, the top groove is a top opening point of the sealing cover, the first top threading wire is firstly torn under the pressing of the top groove, the top groove is preferentially opened, the second top threading wire connected with the first top threading wire is torn along with the continuous pressing of the top rod, and the two second top threading wires are symmetrically distributed on the two sides of the first top threading wire. And the tearing speed of the second top penetrating wire is higher, so that the sealing cover can be opened more easily. In addition, the anti-theft device further has an anti-theft function, is simple in structure and has higher applicability.

Description

Technical Field

[0001] The invention relates to a bottle cap structure, and more particularly to a center top opening type container sealing cap. Background Art

[0002] Existing bottle caps also have top cover types, and most of them are used in water buckets that are equipped with water dispensers. However, the bottle cap is opened on one side, which is prone to interruption, resulting in incomplete opening of the bottle cap, making it difficult to open the bottle mouth, affecting the water use experience.

[0003] For example: Chinese patent announcement number CN206358598U, announcement date July 28, 2017, the name of the utility model is a bottle cap for bottled water matched with a water dispenser, the application discloses a bottle cap structure, including a cap body and a sealing sheet, a column tube is fixedly connected to the inner side of the cap body, and the sealing sheet is located at the lower end of the column tube and is integrally formed. The scheme has a simple structure and is easy to plug into the water dispenser, suitable for short-term stay places; however, the bottle cap in this scheme is laborious and difficult to open, and is prone to interruption. Summary of the invention

[0004] The invention overcomes the problem that the existing top-opening bottle cap is difficult to open, and provides a center-opening container sealing cap. The solution can open the bottle cap from the center to the edge, making the bottle cap opening faster and simpler.

[0005] In order to solve the above technical problems, the present invention adopts the following technical scheme: a center top opening container sealing cover, including a top sheet structure, the top sheet structure including a first top sheet and a second top sheet, a top groove is provided at the center connection between the first top sheet and the second top sheet, a first top threading line is provided between the top groove and the first top sheet and the second top sheet, and a second top threading line is provided at the connection between the first top sheet and the second top sheet. The first top sheet and the second top sheet are the top openings of the sealing cover, the top groove is the top opening point of the sealing cover, the first top threading line and the second top threading line are the tearing lines of the sealing cover, the first top threading line surrounds the top groove and is connected to the two second top threading lines, when there is a top rod such as a top column or a cannula to apply force to the top groove, the first top threading line is first torn under the pressure of the top groove, and the top groove is opened first, as the top rod continues to press down, the second top threading line connected to the first top threading line also begins to tear, and the two second top threading lines are symmetrically distributed on both sides of the first top threading line, the tearing speed of the second top threading line is faster, so the sealing cover can be opened more easily.

[0006] Preferably, the sealing cover comprises a cover top, the cover top is provided with a groove, the top sheet structure is located at the bottom of the groove, and a third top threading line is provided between the top sheet structure and the groove. The groove on the top cover is recessed from the outside to the inside of the sealing cover, and can guide the top rod. The top sheet structure is located at the bottom of the groove. Under normal circumstances, the top sheet structure is not easily damaged by the external structure, so it can play a protective role; when the second top threading line is torn to the bottom edge of the groove, the third top threading line will continue to tear along the bottom edge of the groove, so that the entire top sheet structure is completely opened.

[0007] Preferably, the groove is provided with a first rib and a second rib along the axial direction of the groove wall and corresponding to the first top sheet and the second top sheet respectively. The first rib and the second rib are mainly used to connect the top sheet structure. When the first top sheet and the second top sheet are completely opened, the first rib and the second rib are connected to prevent the first top sheet and the second top sheet from falling into the liquid beverage; the first rib and the second rib are arranged along the groove wall, which can strengthen the firmness of the first rib and the second rib and prevent them from falling off from the groove wall.

[0008] Preferably, the first rib is fixedly connected to the top groove. The first rib is also connected to the top groove to prevent the top groove from falling into the beverage liquid when the cover is opened.

[0009] Preferably, an inner sealing ring is provided on the inner side of the cap top. An inner sealing ring is also provided inside the sealing cap for contact sealing between the inner wall of the bottle mouth and the sealing cap, which is a primary seal to prevent the liquid beverage in the container from leaking out of the bottle mouth.

[0010] Preferably, the container further comprises a sealing cover side wall, the cover top is integrally connected to the sealing cover side wall, and an outer sealing ring is provided at the connection between the sealing cover side wall and the cover top. The outer sealing ring is mainly used to seal the outer wall of the bottle mouth, which is a secondary seal and can prevent external gas from entering the container.

[0011] Preferably, the inner side of the side wall of the sealing cover is provided with a thread, and the thread is provided with a plurality of fractures. The thread is a tightening structure of the sealing cover, and a plurality of fractures are evenly arranged on the entire thread. On the one hand, it can prevent liquid from remaining between the side wall of the sealing cover and the outer wall of the bottle mouth. When there is water in the thread, the water in the thread can flow out from the fracture to avoid the problem of bacterial growth; on the other hand, if the liquid in the container is soda, it can also prevent the problem of excessive gas pressure in the container causing liquid overflow when the sealing cover is opened. When the sealing cover is loosened, the gas pressure inside the container is relatively large, and the internal gas can be discharged from the fracture first, and the discharge speed is relatively slow. As the degree of loosening of the sealing cover increases, the gas discharge rate is also faster, and the tightening degree of the sealing cover can be controlled to achieve the pre-gassing operation from the fracture, thereby avoiding the problem of gas beverage gushing due to high gas pressure.

[0012] Preferably, a plurality of support blocks are evenly distributed between the outer sealing ring and the side wall of the sealing cover. The interval between the outer sealing ring and the inner sealing ring is adapted to the thickness of the bottle mouth, and when the bottle mouth is tightened, it can be engaged with the groove formed between the outer sealing ring and the inner sealing ring, thereby playing a sealing role. The support blocks are mainly used to support the outer sealing ring to prevent the outer sealing ring from being squeezed and deformed when the bottle mouth and the sealing cover are tightened. Among them, the support blocks can be arranged obliquely, that is, the support blocks are arranged obliquely between the outer sealing ring and the side wall of the sealing cover, so that all the support blocks have a certain rotation direction, and their rotation direction is the same as the direction in which the sealing cover is tightened, because when the sealing cover is tightened, the bottle mouth has an opposite torque on the outer sealing ring on the sealing cover, so the rotation direction of the support blocks is the same as the direction in which the sealing cover is tightened, which can bear the effect of the bottle mouth on the torque of the outer sealing ring to a greater extent, thereby improving the strength of the sealing cover.

[0013] Preferably, the side wall of the sealing cover is provided with a plurality of anti-theft buckles evenly distributed in an annular shape, and the anti-theft buckles include a first buckle tooth and a second buckle tooth, and the first buckle tooth and the second buckle tooth are tightly attached and provided with a receiving groove. The anti-theft buckle is mainly used to protect the safety of beverages or water-using products. The first buckle tooth and the second buckle tooth are arranged in parallel, and the overall length of the first buckle tooth is relatively small. The receiving groove between the first buckle tooth and the second buckle tooth is mainly used to clamp the anti-theft ring at the root of the bottle mouth of the container. Among them, the second buckle tooth is arranged obliquely away from the side of the first buckle tooth, which is mainly used to guide the bottle mouth when the sealing cover is matched with the bottle mouth, and can also ensure that the anti-theft ring is smoothly inserted into the receiving groove; the second buckle tooth is arranged horizontally on the side close to the first buckle tooth, which is mainly used to prevent the anti-theft ring from escaping from the receiving groove and failing to play an anti-theft role. The first buckle tooth is close to the top of the sealing cover, and is mainly used to strengthen the overall structural strength of the anti-theft buckle.

[0014] Preferably, connecting ribs are arranged between the plurality of anti-theft buckles. The connecting ribs between the anti-theft buckles are mainly used to enhance the connection strength of the anti-theft buckles to prevent the sealing cover from being taken out together with the anti-theft buckles when the sealing cover is opened.

[0015] Preferably, at least one through hole is provided in an annular shape near the top of the cap on the inner sealing ring. Since a closed space is formed between the mouth of the container and the inner sealing ring and the outer sealing ring, the air in the slot will be compressed, forming a relatively large pressure inside, which has an adverse effect on the inner sealing ring or the outer sealing ring. Therefore, a through hole is arranged at the root of the inner sealing ring, that is, at a position near the top of the cap on the inner sealing ring, so that the internal gas can be introduced into the container, eliminating the effect of high pressure on the inner sealing ring and the outer sealing ring.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) the sealing cover can be opened more easily and quickly; (2) it has an anti-theft function; (3) it has a sealing structure and a better protective structure; (4) it has a simple structure and has higher applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axonometric drawing of the present invention.

[0018] Figure 2 This is an axonometric view from another perspective of the present invention.

[0019] Figure 3 It is a bottom view of the present invention.

[0020] Figure 4 for Figure 3 Middle AA section view.

[0021] Figure 5 for Figure 3 Middle BB section view.

[0022] Figure 6 This is a schematic diagram of Example 2.

[0023] In the figure: 1. top sheet structure, 2. first top sheet, 3. second top sheet, 4. top groove, 5. first top threading, 6. second top threading, 7. sealing cover, 8. cover top, 9. groove, 10. third top threading, 11. first rib, 12. second rib, 13. inner sealing ring, 14. sealing cover side wall, 15. outer sealing ring, 16. thread, 17. fracture, 18. support block, 19. anti-theft buckle, 20. first buckle tooth, 21. second buckle tooth, 22. accommodating groove, 23. connecting rib, 24. through hole, 25. annular protrusion, 26. first inclined surface, 27. second inclined surface, 28. slot, 29. annular groove, 30. friction strip, 31. anti-slip strip. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0025] Example 1: Figures 1 to 5 A center top opening container sealing cover shown in the figure includes a top sheet structure 1 and a cover top 8. The outer surface of the cover top 8 is provided with a cylindrical groove 9. The groove 9 can play a guiding role for the top rod acting on the top sheet structure 1. The bottom of the groove 9 is the top sheet structure 1. The groove 9 can protect the top sheet structure 1. A third top threading line 10 is provided between the top sheet structure 1 and the bottom of the groove. The top sheet structure 1 includes a first top sheet 2 and a second top sheet 3. The first top sheet 2 and the second top sheet 3 are semicircular. The first top sheet 2 and the second top sheet 3 are spliced ​​together to form a circle. The center of the first top sheet 2 and the second top sheet 3 is a semicircular notch. The two semicircular notches are spliced ​​together to accommodate a top groove 4. A second top threading line 6 is provided at the splicing connection between the first top sheet 2 and the second top sheet 3. A ring-shaped first top threading line 5 is provided between the first top sheet 2, the second top sheet 3 and the top groove 4. The first top threading line 5 , the second top threading line 6 and the third top threading line 10 are all tear openings of the sealing cover 7 , which are thinner than the cover top 8 of the sealing cover 7 and are more likely to tear and form openings.

[0026] The first top sheet 2 and the second top sheet 3 are also connected with the first rib 11 and the second rib 12 respectively. The first rib 11 and the second rib 12 are arranged at the diameter position of the circle formed by the first top sheet 2 and the second top sheet 3 and are perpendicular to the second top threading line 6. The first rib 11 and the second rib 12 extend axially from the position of the cover top 8 along the groove 9 to the bottom of the groove 9 and are connected with the first top sheet 2 and the second top sheet 3 in the top sheet structure 1; wherein the first rib 11 also passes through the first top sheet 2 and is fixedly connected with the top groove 4. The first rib 11 connects the first top sheet 2 and the top groove 4. When the top sheet structure 1 is opened, the first rib 11 can connect the first top sheet 2 and the top groove 4 to prevent it from falling into the beverage liquid. The second rib 12 is only connected to the second top sheet 3 to prevent the second top sheet 3 from falling into the beverage liquid after the sealing cover 7 is opened.

[0027] The sealing cover 7 of the present invention can be used for the inverted container of the water dispenser, and can also be used for the common bottled beverage. Regardless of the inverted container or the common beverage bottle, the opening process of the sealing cover 7 is as follows: first, the top groove 4 is supported by the top rod structure such as the conical insertion tube. When the top groove 4 is under pressure, the first top threading line 5 arranged in an annular manner around it is first torn to form an opening. When the first top threading line 5 is completely torn, the top groove 4 is separated from the first top sheet 2 and the second top sheet 3, and is only connected to the first rib 11. As the top rod continues to Insertion, the second top threading line 6 starts to tear from the position connected to the first top threading line 5, and there are two tearing points in opposite directions; when the second top threading line 6 is torn to the third top threading line 10, the third top threading line 10 is torn in a circular shape along the bottom of the groove 9. At this time, the tearing points increase from two to four, and the four tearing points eventually move to the position of the first rib 11 or the second rib 12. The opening speed of the sealing cover 7 increases from one time to two times, and finally to four times, which greatly reduces the difficulty of opening the sealing cover 7 and increases the opening speed of the sealing cover 7.

[0028] The sealing cover 7 also includes a sealing cover side wall 14, and the inner surface of the sealing cover side wall 14 is provided with a thread 16 for assembling the sealing cover 7 at the container bottle mouth. The thread 16 is provided with a plurality of fractures 17. On the one hand, it can prevent residual liquid between the inner surface 14 of the sealing cover side wall and the outer wall of the bottle mouth. When there is water in the thread 16, the water in the thread 16 can flow out from the fracture 17 to avoid the problem of bacterial growth; on the other hand, if the liquid in the container is soda, it can also avoid the problem of excessive gas pressure in the container causing liquid overflow when the sealing cover 7 is opened. When the sealing cover 7 is loosened, the gas pressure inside the container is relatively large, and the internal gas can be discharged from the fracture 17 first, and the discharge speed is relatively slow. As the sealing cover 7 is loosened to a greater extent, the gas discharge rate is also faster, and the tightening degree of the sealing cover 7 can be controlled to implement the pre-gassing operation at the fracture 17, thereby avoiding the problem of gas beverage gushing due to the large gas pressure. It is worth mentioning that the top groove 4 structure and the first top threading line 5 also have the function of pre-deflation. When the liquid inside the container is a gaseous beverage, the top sheet structure 1 is pushed open, and the first thing to be torn is the first top threading line 5. Since the top groove 4 is smaller and the length of the first top threading line 5 is even smaller, the tearing opening is smaller at the beginning, and the air pressure inside the container can be slowly reduced, thereby realizing the pre-deflation operation and avoiding the gushing of gaseous beverages.

[0029] The cover top 8 of the sealing cover 7 and the sealing cover side wall 14 are an integrally formed structure, an inner sealing ring 13 is provided on the inner side of the cover top 8 of the sealing cover 7, an outer sealing ring 15 is provided at the connection between the sealing cover side wall 14 and the cover top 8, and the inner sealing ring 13 and the outer sealing ring 15 are arranged as concentric rings. The inner sealing ring 13 is used for contact sealing between the inner wall of the bottle mouth and the sealing cover 7, which is a primary seal to prevent the liquid beverage in the container from leaking out of the bottle mouth; the outer sealing ring 15 is mainly used for sealing the outer wall of the bottle mouth, which is a secondary seal to prevent external gas from entering the container.

[0030] Among them, the axial length of the inner sealing ring 13 is greater than the axial length of the outer sealing ring 15. The inner sealing ring 13 is provided with an annular convexity 25 on the side away from the cap top 8 and close to the outer sealing ring 15. The annular convexity 25 is the main sealing structure. When the bottle mouth of the container is in contact with the inner sealing ring 13, an extrusion force will be generated between the annular convexity 25 to form an extrusion seal. The annular convexity 25 is provided with a first inclined surface 26. The first inclined surface 26 has a guiding effect on the bottle mouth of the container. When the bottle mouth of the container contacts the annular convexity 25 of the inner sealing ring 13, it will enter the groove 28 between the inner sealing ring 13 and the outer sealing ring 15 along the direction of the first inclined surface 26. The outer sealing ring 15 is provided with a second inclined surface 27 on the side close to the inner sealing ring 13. The second inclined surface 27 also has a guiding effect on the bottle mouth of the container. When the bottle mouth of the container contacts the second inclined surface 27, it will also enter the groove 28 between the inner sealing ring 13 and the outer sealing ring 15 along the inclination direction of the second inclined surface 27. An annular groove 29 is also provided at the bottom of the slot 28 to reduce the compression strength of the gas. When the mouth of the container passes through the first inclined plane 26 and the second inclined plane 27 in sequence, the end of the mouth of the container and the slot 28 will form a sealed space. As the mouth of the container goes deeper, the gas inside the slot 28 will be squeezed. The arrangement of the annular groove 29 is beneficial to reducing the compression strength of the gas.

[0031] A support block 18 is also provided between the outer sealing ring 15 and the sealing cover side wall 14. The support block 18 is mainly used to support the outer sealing ring 15 to prevent the outer sealing ring 15 from being squeezed and deformed when the container bottle mouth and the sealing cover 7 are tightened. Among them, the support block 18 can be arranged obliquely, that is, the support block 18 is arranged obliquely between the outer sealing ring 15 and the sealing cover side wall 14, so that all the support blocks 18 have a certain rotation direction, and the rotation direction is the same as the tightening direction of the sealing cover 7, because when the sealing cover 7 is tightened, the container bottle mouth has an opposite torque on the outer sealing ring 15 on the sealing cover 7, so the rotation direction of the support block 18 is the same as the tightening direction of the sealing cover 7, which can bear the effect of the container bottle mouth on the torque of the outer sealing ring 15 to a greater extent, thereby improving the strength of the sealing cover 7.

[0032] An anti-theft buckle 19 is provided on the side wall 14 of the sealing cover away from the cover top 8. The anti-theft buckle 19 has a plurality of anti-theft buckles 19 and is evenly arranged in an annular shape on the side wall 14 of the sealing cover. The anti-theft buckle 19 includes a first buckle tooth 20 and a second buckle tooth 21, and the size of the first buckle tooth 20 is smaller than the size of the second buckle tooth 21. The first buckle tooth 19 is arranged in parallel with the second buckle tooth 21 and the first buckle tooth 20 is closer to the cover top. A receiving groove 22 is formed between the first buckle tooth 20 and the second buckle tooth 21. The anti-theft buckle 19 is mainly used to protect the safety of beverages or water products. The second buckle tooth 21 is arranged at an angle away from the first buckle tooth 20, mainly used for the sealing cover 7 to cooperate with the container bottle mouth, has a guiding effect on the container bottle mouth, and can also ensure that the anti-theft ring on the container bottle mouth is smoothly inserted into the receiving groove 22; the second buckle tooth 21 is arranged horizontally on the side close to the first buckle tooth 20, mainly used to prevent the anti-theft ring from escaping from the receiving groove 22, and cannot play an anti-theft role. The first buckle tooth 20 is located at a side of the second buckle tooth 21 close to the top 8 of the sealing cover 7 , and is mainly used to enhance the overall structural strength of the anti-theft buckle 19 .

[0033] Connecting ribs 23 are provided between the anti-theft buckles 19 to enhance the connection strength of the anti-theft buckles 19 and prevent the anti-theft buckles 19 from being taken out of the sealing cover 7 when the sealing cover 7 is opened. Friction strips 30 are also provided on the first buckle teeth 20 and the second buckle teeth 21. The friction strips 30 can limit the anti-theft buckles 19 from rotating together with the twisting of the sealing cover 7, and can also eliminate the surface stress of the anti-theft buckles 19.

[0034] An anti-slip strip 31 is also provided on the outer surface of the sealing cover 7 along the axial direction of the sealing cover 7 , which can increase the friction force when the sealing cover 7 is twisted.

[0035] Example 2: Figures 1 to 6 A center top opening container sealing cover shown in the figure includes a top sheet structure 1 and a cover top 8. The outer surface of the cover top 8 is provided with a cylindrical groove 9. The groove 9 can play a guiding role for the top rod acting on the top sheet structure 1. The bottom of the groove 9 is the top sheet structure 1. The groove 9 can protect the top sheet structure 1. A third top threading line 10 is provided between the top sheet structure 1 and the bottom of the groove. The top sheet structure 1 includes a first top sheet 2 and a second top sheet 3. The first top sheet 2 and the second top sheet 3 are semicircular. The first top sheet 2 and the second top sheet 3 are spliced ​​together to form a circle. The center of the first top sheet 2 and the second top sheet 3 is a semicircular notch. The two semicircular notches are spliced ​​together to accommodate a top groove 4. A second top threading line 6 is provided at the splicing connection between the first top sheet 2 and the second top sheet 3. A ring-shaped first top threading line 5 is provided between the first top sheet 2, the second top sheet 3 and the top groove 4. The first top threading line 5 , the second top threading line 6 and the third top threading line 10 are all tear openings of the sealing cover 7 , which are thinner than the cover top 8 of the sealing cover 7 and are more likely to tear and form openings.

[0036] The first top sheet 2 and the second top sheet 3 are also connected with the first rib 11 and the second rib 12 respectively. The first rib 11 and the second rib 12 are arranged at the diameter position of the circle formed by the first top sheet 2 and the second top sheet 3 and are perpendicular to the second top threading line 6. The first rib 11 and the second rib 12 extend axially from the position of the cover top 8 along the groove 9 to the bottom of the groove 9 and are connected with the first top sheet 2 and the second top sheet 3 in the top sheet structure 1; wherein the first rib 11 also passes through the first top sheet 2 and is fixedly connected with the top groove 4. The first rib 11 connects the first top sheet 2 and the top groove 4. When the top sheet structure 1 is opened, the first rib 11 can connect the first top sheet 2 and the top groove 4 to prevent it from falling into the beverage liquid. The second rib 12 is only connected to the second top sheet 3 to prevent the second top sheet 3 from falling into the beverage liquid after the sealing cover 7 is opened.

[0037] The sealing cover 7 of the present invention can be used for the inverted container of the water dispenser, and can also be used for the common bottled beverage. Regardless of the inverted container or the common beverage bottle, the opening process of the sealing cover 7 is as follows: first, the top groove 4 is supported by the top rod structure such as the conical insertion tube. When the top groove 4 is under pressure, the first top threading line 5 arranged in an annular manner around it is first torn to form an opening. When the first top threading line 5 is completely torn, the top groove 4 is separated from the first top sheet 2 and the second top sheet 3, and is only connected to the first rib 11. As the top rod continues to Insertion, the second top threading line 6 starts to tear from the position connected to the first top threading line 5, and there are two tearing points in opposite directions; when the second top threading line 6 is torn to the third top threading line 10, the third top threading line 10 is torn in a circular shape along the bottom of the groove 9. At this time, the tearing points increase from two to four, and the four tearing points eventually move to the position of the first rib 11 or the second rib 12. The opening speed of the sealing cover 7 increases from one time to two times, and finally to four times, which greatly reduces the difficulty of opening the sealing cover 7 and increases the opening speed of the sealing cover 7.

[0038] The sealing cover 7 also includes a sealing cover side wall 14, and the inner surface of the sealing cover side wall 14 is provided with a thread 16 for assembling the sealing cover 7 at the container bottle mouth. The thread 16 is provided with a plurality of fractures 17. On the one hand, it can prevent residual liquid between the inner surface 14 of the sealing cover side wall and the outer wall of the bottle mouth. When there is water in the thread 16, the water in the thread 16 can flow out from the fracture 17 to avoid the problem of bacterial growth; on the other hand, if the liquid in the container is soda, it can also avoid the problem of excessive gas pressure in the container causing liquid overflow when the sealing cover 7 is opened. When the sealing cover 7 is loosened, the gas pressure inside the container is relatively large, and the internal gas can be discharged from the fracture 17 first, and the discharge speed is relatively slow. As the sealing cover 7 is loosened to a greater extent, the gas discharge rate is also faster, and the tightening degree of the sealing cover 7 can be controlled to implement the pre-gassing operation at the fracture 17, thereby avoiding the problem of gas beverage gushing due to the large gas pressure. It is worth mentioning that the top groove 4 structure and the first top threading line 5 also have the function of pre-deflation. When the liquid inside the container is a gaseous beverage, the top sheet structure 1 is pushed open, and the first thing to be torn is the first top threading line 5. Since the top groove 4 is smaller and the length of the first top threading line 5 is even smaller, the tearing opening is smaller at the beginning, and the air pressure inside the container can be slowly reduced, thereby realizing the pre-deflation operation and avoiding the gushing of gaseous beverages.

[0039] The cover top 8 of the sealing cover 7 and the sealing cover side wall 14 are an integrally formed structure, an inner sealing ring 13 is provided on the inner side of the cover top 8 of the sealing cover 7, an outer sealing ring 15 is provided at the connection between the sealing cover side wall 14 and the cover top 8, and the inner sealing ring 13 and the outer sealing ring 15 are arranged as concentric rings. The inner sealing ring 13 is used for contact sealing between the inner wall of the bottle mouth and the sealing cover 7, which is a primary seal to prevent the liquid beverage in the container from leaking out of the bottle mouth; the outer sealing ring 15 is mainly used for sealing the outer wall of the bottle mouth, which is a secondary seal to prevent external gas from entering the container.

[0040] Among them, the axial length of the inner sealing ring 13 is greater than the axial length of the outer sealing ring 15. The inner sealing ring 13 is provided with an annular convexity 25 on the side away from the cap top 8 and close to the outer sealing ring 15. The annular convexity 25 is the main sealing structure. When the bottle mouth of the container is in contact with the inner sealing ring 13, an extrusion force will be generated between the annular convexity 25 to form an extrusion seal. The annular convexity 25 is provided with a first inclined surface 26. The first inclined surface 26 has a guiding effect on the bottle mouth of the container. When the bottle mouth of the container contacts the annular convexity 25 of the inner sealing ring 13, it will enter the groove 28 between the inner sealing ring 13 and the outer sealing ring 15 along the direction of the first inclined surface 26. The outer sealing ring 15 is provided with a second inclined surface 27 on the side close to the inner sealing ring 13. The second inclined surface 27 also has a guiding effect on the bottle mouth of the container. When the bottle mouth of the container contacts the second inclined surface 27, it will also enter the groove 28 between the inner sealing ring 13 and the outer sealing ring 15 along the inclination direction of the second inclined surface 27. An annular groove 29 is also provided at the bottom of the slot 28 to reduce the compression strength of the gas. When the mouth of the container passes through the first inclined plane 26 and the second inclined plane 27 in sequence, the end of the mouth of the container and the slot 28 will form a sealed space. As the mouth of the container goes deeper, the gas inside the slot 28 will be squeezed. The arrangement of the annular groove 29 is beneficial to reducing the compression strength of the gas.

[0041] A support block 18 is also provided between the outer sealing ring 15 and the sealing cover side wall 14. The support block 18 is mainly used to support the outer sealing ring 15 to prevent the outer sealing ring 15 from being squeezed and deformed when the container bottle mouth and the sealing cover 7 are tightened. Among them, the support block 18 can be arranged obliquely, that is, the support block 18 is arranged obliquely between the outer sealing ring 15 and the sealing cover side wall 14, so that all the support blocks 18 have a certain rotation direction, and the rotation direction is the same as the tightening direction of the sealing cover 7, because when the sealing cover 7 is tightened, the container bottle mouth has an opposite torque on the outer sealing ring 15 on the sealing cover 7, so the rotation direction of the support block 18 is the same as the tightening direction of the sealing cover 7, which can bear the effect of the container bottle mouth on the torque of the outer sealing ring 15 to a greater extent, thereby improving the strength of the sealing cover 7.

[0042] An anti-theft buckle 19 is provided on the side wall 14 of the sealing cover away from the cover top 8. The anti-theft buckle 19 has a plurality of anti-theft buckles 19 and is evenly arranged in an annular shape on the side wall 14 of the sealing cover. The anti-theft buckle 19 includes a first buckle tooth 20 and a second buckle tooth 21, and the size of the first buckle tooth 20 is smaller than the size of the second buckle tooth 21. The first buckle tooth 19 is arranged in parallel with the second buckle tooth 21 and the first buckle tooth 20 is closer to the cover top. A receiving groove 22 is formed between the first buckle tooth 20 and the second buckle tooth 21. The anti-theft buckle 19 is mainly used to protect the safety of beverages or water products. The second buckle tooth 21 is arranged at an angle away from the first buckle tooth 20, mainly used for the sealing cover 7 to cooperate with the container bottle mouth, has a guiding effect on the container bottle mouth, and can also ensure that the anti-theft ring on the container bottle mouth is smoothly inserted into the receiving groove 22; the second buckle tooth 21 is arranged horizontally on the side close to the first buckle tooth 20, mainly used to prevent the anti-theft ring from escaping from the receiving groove 22, and cannot play an anti-theft role. The first buckle tooth 20 is located at a side of the second buckle tooth 21 close to the top 8 of the sealing cover 7 , and is mainly used to enhance the overall structural strength of the anti-theft buckle 19 .

[0043] Connecting ribs 23 are provided between the anti-theft buckles 19 to enhance the connection strength of the anti-theft buckles 19 and prevent the anti-theft buckles 19 from being taken out of the sealing cover 7 when the sealing cover 7 is opened. Friction strips 30 are also provided on the first buckle teeth 20 and the second buckle teeth 21. The friction strips 30 can limit the anti-theft buckles 19 from rotating together with the twisting of the sealing cover 7, and can also eliminate the surface stress of the anti-theft buckles 19.

[0044] An anti-slip strip 31 is also provided on the outer surface of the sealing cover 7 along the axial direction of the sealing cover 7 , which can increase the friction force when the sealing cover 7 is twisted.

[0045] In addition, at least one through hole 24 is provided in an annular shape on the inner sealing ring 13 near the cap top 8. After a closed space is formed between the container mouth and the inner sealing ring 13 and the outer sealing ring 15, the air in the card slot 28 will be compressed, forming a relatively large pressure inside, which has an adverse effect on the inner sealing ring 13 or the outer sealing ring 15. Therefore, the through hole 24 is arranged at the root of the inner sealing ring 13, that is, at a position on the inner sealing ring 13 near the cap top 8, so that the internal gas can be introduced into the container, eliminating the influence of the high pressure on the inner sealing ring 13 and the outer sealing ring 15. In addition, for gaseous beverages, when the sealing cap 7 is loosened and the mouth of the container is separated from the second inclined surface 27 of the outer sealing ring 15, the gas in the container will first enter the groove 28 from the through hole 24, and then enter the fracture 17 of the thread 16 from the groove 28, thereby achieving pre-deflation; when the mouth of the container continues to separate from the first inclined surface 26 of the inner sealing ring 13, it is the main deflation process. Since pre-deflation is achieved at the through hole 24, the liquid gushing in the container can be avoided.

Claims

1. A center top opening container sealing cover, characterized in that: It includes a top sheet structure, which includes a first top sheet and a second top sheet. A top groove is provided at the center connection between the first top sheet and the second top sheet, a first top threading line is provided between the top groove and the first top sheet and the second top sheet, and a second top threading line is provided at the connection between the first top sheet and the second top sheet.

2. A center top opening container sealing cover according to claim 1, characterized in that: The sealing cover comprises a cover top, the cover top is provided with a groove, the top sheet structure is located at the bottom of the groove, and a third top threading line is provided between the top sheet structure and the groove.

3. A center top opening container sealing cover according to claim 2, characterized in that: The groove is provided with a first rib and a second rib along the axial direction of the groove wall and corresponding to the first top sheet and the second top sheet respectively.

4. A center top opening container sealing cover according to claim 3, characterized in that: The first rib is fixedly connected to the top groove.

5. A center top opening container sealing cover according to any one of claims 2 to 4, characterized in that: An inner sealing ring is arranged on the inner side surface of the cover top.

6. A center top opening container sealing cover according to claim 5, characterized in that: It also includes a sealing cover side wall, the cover top is integrally connected with the sealing cover side wall, and an outer sealing ring is provided at the connection between the sealing cover side wall and the cover top.

7. A center top opening container sealing cover according to claim 6, characterized in that: The inner side of the side wall of the sealing cover is provided with a thread, and the thread is provided with a plurality of fractures.

8. A center top opening container sealing cover according to claim 7, characterized in that: A plurality of support blocks are evenly distributed between the outer sealing ring and the side wall of the sealing cover.

9. A center top opening container sealing cover according to any one of claims 6 to 8, characterized in that: The side wall of the sealing cover is provided with a plurality of anti-theft buckles evenly distributed in an annular shape, and the anti-theft buckles include a first buckle tooth and a second buckle tooth, the first buckle tooth and the second buckle tooth are tightly attached to each other and provided with a receiving groove; connecting ribs are provided between the anti-theft buckles.

10. The center top opening container sealing cover according to claim 5, characterized in that: The inner sealing ring is provided with at least one through hole in an annular shape near the top of the cover.

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