A bottle cap and bottle mouth sealing structure
By incorporating an annular limiting groove and an elastic sealing ring within the bottle cap, the problem of precise positioning of the sealing gasket in existing technologies is solved, enabling convenient assembly and low-cost production of the plastic bottle cap and bottle opening.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- OSMI (NINGBO) PACKAGING CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-14
AI Technical Summary
When adding a sealing gasket between the cap and the bottle mouth to achieve a sealing effect on existing plastic bottles, precise positioning is required, which leads to inconvenient assembly and increased production costs.
The bottle cap features an annular limiting groove and an elastic sealing ring. The bottle mouth extends into the limiting groove and abuts against the top side of the bottle cap. The elastic sealing ring presses against the inner wall of the bottle mouth to achieve a seal. The combination of a threaded structure and a limiting ring simplifies assembly.
It achieves a good seal without the need for gaskets, simplifies the assembly process, reduces production costs, and improves production efficiency.
Smart Images
Figure CN224492114U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic products technology, and in particular to a sealing structure between a bottle cap and a bottle mouth. Background Technology
[0002] Currently, plastic bottles are widely used in various fields, such as beverage bottles, condiment bottles, and skin care product bottles. When producing these plastic bottles, the sealing performance between the cap and the bottle neck is a key consideration. Existing plastic bottles typically achieve a good seal by adding a sealing gasket between the cap and the bottle neck. For example, patent number CN216862360U describes a plastic bottle cap based on a high-efficiency sealing gasket. This bottle cap has a first sealing gasket inside, which works with a sealing groove and a sealing ring to seal the bottle neck. While adding a sealing gasket ensures a good seal, it requires precise positioning of the gasket during assembly, making assembly less convenient and increasing production costs.
[0003] Therefore, existing technologies still need to be improved and enhanced. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a sealing structure for bottle cap and bottle mouth, which aims to solve the problem that in the prior art, plastic bottles usually add a sealing gasket between the bottle cap and the bottle mouth to achieve a good sealing effect, but the sealing gasket needs to be positioned accurately during assembly, which makes the assembly of bottle cap and bottle mouth inconvenient and increases production costs.
[0005] The technical solution adopted by this utility model to solve the technical problem is as follows:
[0006] In a first aspect, embodiments of this utility model provide a sealing structure between a bottle cap and a bottle opening, comprising:
[0007] The bottle cap has an annular limiting groove on its top side and a first sealing ring with elasticity on one side of the annular limiting groove.
[0008] The bottle opening is located inside the bottle cap. The top end of the bottle opening is located inside the annular limiting groove and abuts against the top side of the bottle cap. The first sealing ring is located inside the bottle opening and abuts against the inner wall of the bottle opening to seal the side of the bottle opening.
[0009] As a further improved technical solution, an elastic second sealing ring is provided on the side of the annular limiting groove facing the bottle mouth, and the second sealing ring abuts against the top end face of the bottle mouth.
[0010] As a further improved technical solution, a first limiting ring and a second limiting ring are provided on the top side inside the bottle cap. The first limiting ring and the second limiting ring are spaced apart to form the annular limiting groove. The first sealing ring is provided on the side of the second limiting ring close to the first limiting ring. The second sealing ring is located between the first limiting ring and the second limiting ring. Both the first limiting ring and the second limiting ring are elastic.
[0011] As a further improved technical solution, the outer side of the bottle opening is provided with an external thread, the inner side of the bottle cap is provided with an internal thread, and the bottle cap and the bottle opening are screwed together by the mating of the internal thread and the external thread.
[0012] As a further improved technical solution, the external thread is provided with a plurality of first breaks, and the internal thread is provided with a plurality of second breaks.
[0013] As a further improved technical solution, a plurality of first fractures are evenly distributed on the external thread, and a plurality of second fractures are evenly distributed on the internal thread.
[0014] As a further improvement, the outer side of the bottle cap is provided with anti-slip texture.
[0015] As a further improved technical solution, a third limiting ring is provided on the outer side of the bottle mouth along the circumferential direction. The third limiting ring is located below the external thread. The bottom of the bottle cap is detachably connected to a breakable ring. The bottom of the breakable ring is provided with a conical ring extending toward the inner top side of the bottle cap. The top of the conical ring abuts against the bottom side of the third limiting ring.
[0016] As a further improved technical solution, the conical ring is elastic, and the bottom side of the conical ring is provided with multiple grooves.
[0017] As a further improved technical solution, the grooves are evenly distributed on the bottom side of the conical ring.
[0018] Compared with the prior art, the embodiments of this utility model have the following advantages:
[0019] This utility model provides a sealing structure for a bottle cap and bottle mouth, comprising: a bottle cap, wherein an annular limiting groove is provided on the top side of the inner side of the bottle cap, and a first sealing ring with elasticity is provided on one side of the annular limiting groove; and a bottle mouth, wherein the bottle mouth is disposed within the bottle cap, the top end of the bottle mouth is located within the annular limiting groove and abuts against the top side of the bottle cap, and the first sealing ring is located within the bottle mouth and abuts against the inner wall of the bottle mouth to seal the side of the bottle mouth. In this utility model, when the bottle cap and bottle mouth are assembled, the top end of the bottle mouth extends into the annular limiting groove and abuts against the top side of the inner side of the bottle cap, thereby achieving a top seal on the bottle mouth. Then, the first sealing ring abuts against the inner wall of the bottle mouth, thereby achieving a side seal on the bottle mouth. The sealing structure for the bottle cap and bottle mouth provided by this utility model does not require a sealing gasket, and during assembly, only the top end of the bottle mouth needs to be aligned with the annular limiting groove. This utility model reduces production costs and simplifies the assembly process, while improving production efficiency while ensuring good sealing performance. Attached Figure Description
[0020] Figure 1 A cross-sectional structural diagram of a sealing structure between a bottle cap and a bottle mouth provided by this utility model;
[0021] Figure 2 A three-dimensional structural diagram of a sealing structure between a bottle cap and a bottle mouth provided by this utility model;
[0022] Figure 3 This is a schematic diagram of the cross-sectional structure of the bottle cap in this utility model;
[0023] Figure 4 This is a three-dimensional structural diagram of the bottle cap in this utility model;
[0024] Figure 5 This is a three-dimensional structural diagram of the bottle opening in this utility model.
[0025] In the diagram: 1. Bottle cap; 101. Annular limiting groove; 102. First sealing ring; 103. Second sealing ring; 104. Internal thread; 105. Second break; 2. Bottle mouth; 201. External thread; 202. First break; 3. First limiting ring; 4. Second limiting ring; 5. Anti-slip texture; 6. Third limiting ring; 7. Fracture ring; 701. Conical ring; 8. Groove. Detailed Implementation
[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0027] Example:
[0028] Please see Figures 1-5 The sealing structure between the bottle cap 1 and the bottle opening 2 includes: a bottle cap 1, with an annular limiting groove 101 on the top side inside the bottle cap 1, and a first sealing ring 102 with elasticity on one side inside the annular limiting groove 101; and a bottle opening 2, which is disposed inside the bottle cap 1, with the top end of the bottle opening 2 located inside the annular limiting groove 101 and abutting against the top side of the bottle cap 1, and the first sealing ring 102 located inside the bottle opening 2 and abutting against the inner wall of the bottle opening 2 to seal the side of the bottle opening 2.
[0029] like Figure 1 and Figure 2 As shown, in this embodiment, the sealing structure of the bottle cap 1 and the bottle mouth 2 is composed of the bottle cap 1 and the bottle mouth 2. Both the bottle cap 1 and the bottle mouth 2 are made of plastic. The top side of the bottle cap 1 is provided with an annular limiting groove 101. The width of the annular limiting groove 101 is adapted to the wall thickness of the bottle mouth 2. The smaller diameter side of the annular limiting groove 101 is provided with a first sealing ring 102, and the first sealing ring 102 is elastic. The bottle mouth 2 is disposed inside the bottle cap 1, and the top of the bottle mouth 2 is located inside the annular limiting groove 101 and abuts against the top side of the bottle cap 1, so as to seal the top of the bottle mouth 2 through the top side of the bottle cap 1. When the bottle mouth 2 is assembled with the bottle cap 1, the side wall of the bottle mouth 2 will squeeze the first sealing ring 102. The first sealing ring 102 is located inside the bottle mouth 2 and, after slight deformation, abuts against the inner wall of the bottle mouth 2 to seal the side of the bottle mouth 2. In this invention, when the bottle cap 1 is assembled with the bottle mouth 2, the top of the bottle mouth 2 extends into the annular limiting groove 101 and abuts against the top side inside the bottle cap 1, thereby sealing the top of the bottle mouth 2. Then, the first sealing ring 102 abuts against the inner wall of the bottle mouth 2, thereby sealing the side of the bottle mouth 2. The sealing structure of the bottle cap 1 and bottle mouth 2 provided by this invention does not require a sealing gasket, and during assembly, it is only necessary to align the top of the bottle mouth 2 with the annular limiting groove 101. This invention reduces production costs and simplifies the assembly process, while improving production efficiency while ensuring good sealing performance.
[0030] Furthermore, the annular limiting groove 101 has an elastic second sealing ring 103 on the side facing the bottle mouth 2, and the second sealing ring 103 abuts against the top end face of the bottle mouth 2.
[0031] Specifically, when the top end of the bottle mouth 2 extends into the annular limiting groove 101, the top end face of the bottle mouth 2 contacts the second sealing ring 103. When the bottle mouth 2 and the bottle cap 1 are assembled, the top end face of the bottle mouth 2 presses against the second sealing ring 103. The second sealing ring 103 is slightly deformed and completely adheres to the top end face of the bottle mouth 2 to seal the top of the bottle mouth 2.
[0032] like Figure 3 As shown, in one embodiment of this utility model, a first limiting ring 3 and a second limiting ring 4 are provided on the top side inside the bottle cap 1. The first limiting ring 3 and the second limiting ring 4 are spaced apart to form the annular limiting groove 101. The first sealing ring 102 is provided on the side of the second limiting ring 4 close to the first limiting ring 3. The second sealing ring 103 is located between the first limiting ring 3 and the second limiting ring 4. Both the first limiting ring 3 and the second limiting ring 4 are elastic.
[0033] Specifically, the inner diameter of the first limiting ring 3 is larger than the inner diameter of the second limiting ring 4. Along the height direction of the bottle cap 1, the width of the first limiting ring 3 is smaller than the width of the second limiting ring 4. The first limiting ring 3 and the second limiting ring 4 are spaced apart to form the annular limiting groove 101. For example, the distance between the first limiting ring 3 and the second limiting ring 4 is 1 mm. The first sealing ring 102 is disposed at the bottom of the second limiting ring 4 on the side close to the first limiting ring 3. The second sealing ring 103 is located between the first limiting ring 3 and the second limiting ring 4. For example, the thickness of the second sealing ring 103 is 0.5 mm. Gaps are left between the first limiting ring 3 and the second sealing ring 103 and between the second sealing ring 103 and the second limiting ring 4 so that the top of the bottle mouth 2 can press the second sealing ring 103 to seal the top of the bottle mouth 2.
[0034] In this embodiment, the outer side of the bottle opening 2 is provided with an external thread 201, and the inner side of the bottle cap 1 is provided with an internal thread 104. The bottle cap 1 and the bottle opening 2 are screwed together by the mating of the internal thread 104 and the external thread 201.
[0035] like Figure 4 and Figure 5As shown, further, the external thread 201 is provided with a plurality of first breaks 202, and the internal thread 104 is provided with a plurality of second breaks 105. Specifically, the first breaks 202 are opened along the height direction of the bottle mouth 2, and the second breaks 105 are opened along the height direction of the bottle cap 1. When the bottle cap 1 is tightened, the thread segments on both sides of the first breaks 202 and the second breaks 105 will undergo slight deformation due to stress, so that the contact pressure between the thread teeth is concentrated on the effective thread segments on both sides of the breaks, forming a multi-point seal and enhancing the sealing performance. When processing continuous threads of brittle materials such as plastics, the root of the thread is prone to cracking due to stress concentration. The first breaks 202 and the second breaks 105 can disperse stress, avoid excessive local stress, and extend the service life of the bottle mouth 2 and the bottle cap 1. Continuous threads need to overcome the friction of the helical surface throughout the entire process, which is laborious when screwing. The first breaks 202 and the second breaks 105 reduce the continuous contact area of the threads, and the total friction during the screwing process is smaller, making opening and closing easier. Meanwhile, the threaded sections on both sides of the first fracture 202 and the second fracture 105 can still ensure sufficient contact pressure to ensure that the fastening is not weakened.
[0036] Furthermore, a plurality of first fracture surfaces 202 are evenly distributed on the external thread 201, and a plurality of second fracture surfaces 105 are evenly distributed on the internal thread 104. For example, four first fracture surfaces 202 are evenly distributed on the external thread 201, and four second fracture surfaces 105 are evenly distributed on the second fracture surfaces 104.
[0037] In this embodiment, the outer side of the bottle cap 1 is provided with anti-slip texture 5 to prevent the hand from slipping when rotating the bottle cap 1.
[0038] Furthermore, a third limiting ring 6 is provided circumferentially on the outer side of the bottle mouth 2. The third limiting ring 6 is located below the external thread 201. A breakable ring 7 is provided at the bottom of the bottle cap 1. A conical ring 701 extending toward the inner top side of the bottle cap 1 is provided at the bottom of the breakable ring 7. The top of the conical ring 701 abuts against the bottom side of the third limiting ring 6.
[0039] Specifically, the fracture ring 7 serves as an anti-theft and reinforcement mechanism. The fracture ring 7 has multiple protrusions (not shown) that connect to the bottle cap 1, effectively adding an extra layer of fixation to the bottle cap 1. This reduces the probability of the bottle cap 1 loosening during transportation and handling, and, combined with the threaded structure, further ensures a tight seal. The conical ring 701 abuts against the third limiting ring 6. When the bottle cap 1 is opened, it rotates upwards, causing the fracture ring 7 to move upwards. At this time, the conical ring 701 is pressed against the third limiting ring 6. When the force of rotating the bottle cap 1 reaches a certain level, the protrusions on the fracture ring 7 break off from the bottle cap 1. The fracture ring 7 remains on the bottle opening 2, and the bottle cap 1 is removed.
[0040] Furthermore, the conical ring 701 is elastic, and the bottom side of the conical ring 701 is provided with a plurality of grooves 8. By providing a plurality of grooves 8 on the bottom side of the conical ring 701, and the grooves 8 being evenly distributed at intervals on the bottom side of the conical ring 701, the conical ring 701 can bend, thus playing a buffering role, making it relatively easier to apply force when opening the bottle cap 1.
[0041] In summary, this utility model embodiment provides a sealing structure for a bottle cap 1 and a bottle mouth 2, comprising: a bottle cap 1, wherein an annular limiting groove 101 is provided on the top side of the bottle cap 1, and a first sealing ring 102 with elasticity is provided on one side of the annular limiting groove 101; and a bottle mouth 2, wherein the bottle mouth 2 is disposed within the bottle cap 1, the top end of the bottle mouth 2 is located within the annular limiting groove 101 and abuts against the top side of the bottle cap 1, and the first sealing ring 102 is located within the bottle mouth 2 and abuts against the inner wall of the bottle mouth 2 to seal the side of the bottle mouth 2. In this utility model, when the bottle cap 1 and the bottle mouth 2 are assembled, the top end of the bottle mouth 2 will extend into the annular limiting groove 101 and abut against the top side of the bottle cap 1, thereby achieving a top seal of the bottle mouth 2, and then the first sealing ring 102 abuts against the inner wall of the bottle mouth 2, thereby achieving a side seal of the bottle mouth 2. The sealing structure between the bottle cap 1 and the bottle mouth 2 provided by this utility model does not require a sealing gasket, and during assembly, it is only necessary to align the top of the bottle mouth 2 with the annular limiting groove 101. This utility model not only reduces production costs and simplifies the assembly process, but also improves production efficiency while ensuring good sealing performance.
[0042] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0043] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0044] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0045] Of course, the above description of the embodiments of this utility model is quite detailed, but it should not be construed as a limitation on the scope of protection of this utility model. This utility model may have other various implementations. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model. The scope of protection of this utility model is subject to the appended claims.
Claims
1. A sealing structure between a bottle cap and a bottle opening, characterized in that, include: The bottle cap has an annular limiting groove on its top side and a first sealing ring with elasticity on one side of the annular limiting groove. The bottle opening is located inside the bottle cap. The top end of the bottle opening is located inside the annular limiting groove and abuts against the top side of the bottle cap. The first sealing ring is located inside the bottle opening and abuts against the inner wall of the bottle opening to seal the side of the bottle opening.
2. The sealing structure between the bottle cap and the bottle mouth according to claim 1, characterized in that, The annular limiting groove has a second, elastic sealing ring on the side facing the bottle opening, and the second sealing ring abuts against the top end face of the bottle opening.
3. The sealing structure between the bottle cap and the bottle mouth according to claim 2, characterized in that, The top side inside the bottle cap is provided with a first limiting ring and a second limiting ring, which are spaced apart to form the annular limiting groove; the first sealing ring is disposed on the side of the second limiting ring close to the first limiting ring, the second sealing ring is located between the first limiting ring and the second limiting ring, and both the first limiting ring and the second limiting ring are elastic.
4. The sealing structure between the bottle cap and the bottle mouth according to claim 1, characterized in that, The bottle opening has an external thread on the outside, and the bottle cap has an internal thread on the inside. The bottle cap and the bottle opening are screwed together by the mating of the internal thread and the external thread.
5. The sealing structure between the bottle cap and the bottle mouth according to claim 4, characterized in that, The external thread has several first breaks, and the internal thread has several second breaks.
6. The sealing structure between the bottle cap and the bottle mouth according to claim 5, characterized in that, Several first fractures are evenly distributed on the external thread, and several second fractures are evenly distributed on the internal thread.
7. The sealing structure between the bottle cap and the bottle mouth according to claim 1, characterized in that, The bottle cap has anti-slip texture on the outside.
8. The sealing structure between the bottle cap and the bottle mouth according to claim 4, characterized in that, A third limiting ring is provided circumferentially on the outer side of the bottle opening. The third limiting ring is located below the external thread. A breakable ring is connected to the bottom of the bottle cap. The bottom of the breakable ring is provided with a conical ring extending toward the inner top side of the bottle cap. The top of the conical ring abuts against the bottom side of the third limiting ring.
9. The sealing structure between the bottle cap and the bottle mouth according to claim 8, characterized in that, The conical ring is elastic, and the bottom side of the conical ring is provided with multiple grooves.
10. The sealing structure between the bottle cap and the bottle mouth according to claim 9, characterized in that, The grooves are evenly spaced and distributed on the bottom side of the conical ring.