Milk bottle cap with high sealing performance

Abstract

The utility model relates to the technical field of bottle caps, in particular to a high-sealing-performance milk bottle cap which comprises a cap body, an annular plug is installed in the middle of the inner side of the cap body, an annular groove is formed in the inner wall of the cap body, a sealing ring is arranged between the outer wall of the annular plug and the inner wall of the cap body, and the outer wall of the sealing ring is matched with the groove in a clamped mode. The upper portion and the lower portion, close to the inner side of the sealing ring, of the outer wall of the annular plug are provided with an annular first limiting protrusion and an annular second limiting protrusion respectively, and the inner side of the sealing ring is clamped between the first limiting protrusion and the second limiting protrusion. According to the milk bottle cap with the high sealing performance, the double-sealing effect is achieved through the annular plug installed in the middle of the inner side of the cap body and the sealing ring arranged between the annular plug and the inner wall of the cap body. The outer wall of the sealing ring is matched with the groove in the inner wall of the cap body in a clamped mode, meanwhile, the first limiting protrusion and the second limiting protrusion on the outer wall of the annular plug firmly clamp the inner side of the sealing ring, and the sealing performance of the bottle cap is greatly improved through the multi-layer and multi-structure sealing design.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle caps, in particular to a milk bottle cap with high sealing performance. Background Art

[0002] In the milk packaging industry, bottle caps are crucial components for ensuring milk freshness and preventing external contamination, and their sealing performance is crucial. While traditional milk bottle caps can achieve a certain degree of sealing, they often have problems. These include loose seals that can lead to milk spoilage and leakage, and inconvenience or even damage during opening, impacting the user experience. This is especially true during long-distance transportation or storage, where fluctuations in ambient temperature, humidity, and other conditions place even higher demands on the cap's sealing performance.

[0003] Existing milk bottle caps often have simple sealing structures, primarily achieved through internal threads or simple rubber gaskets. However, these structures can easily degrade in sealing performance due to wear and aging over time. Furthermore, some bottle caps require considerable force to open, making them inconvenient to operate and potentially damaging the caps, or even injuring the user. Utility Model Content

[0004] The purpose of the present invention is to provide a milk bottle cap with high sealing performance, so as to solve the problem that the sealing structure of the milk bottle cap in the prior art proposed in the above background technology is often relatively simple, and the sealing is mainly achieved by the threads inside the bottle cap or a simple rubber gasket.

[0005] To achieve the above-mentioned purpose, the utility model provides a milk bottle cap with high sealing performance, including a cap body, an annular plug is installed in the middle part of the inner side of the cap body, the inner wall of the cap body is provided with an annular groove, a sealing ring is provided between the outer wall of the annular plug and the inner wall of the cap body, the outer wall of the sealing ring is snap-fitted with the groove, and the outer wall of the annular plug is respectively provided with an annular first limiting protrusion and a second limiting protrusion at the upper and lower parts of the inner side near the sealing ring, and the inner side of the sealing ring is clamped between the first limiting protrusion and the second limiting protrusion.

[0006] Preferably, the outer wall of the annular plug is designed as a slope.

[0007] Preferably, a tear strip is provided on one side of the bottom of the cover body, a convex ring is provided on the inner wall of the cover body, the convex ring is connected to the tear strip, and an annular groove is provided on the upper part of the convex ring.

[0008] Preferably, the outer wall of the tear strip is provided with an anti-slip strip.

[0009] Preferably, a concave ring is provided on the top of the cover body.

[0010] Preferably, the second limiting protrusion is located opposite to the convex ring, and the outer wall of the convex ring is a curved surface structure.

[0011] Preferably, the outer wall of the second limiting protrusion is a slope structure, and the angle between the slope and the outer surface of the annular plug is 120 degrees.

[0012] Preferably, the outer wall of the first limiting protrusion is a curved surface structure.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This highly airtight milk bottle cap achieves a dual sealing effect through an annular plug installed in the middle of the inner side of the cap and a sealing ring disposed between the annular plug and the inner wall of the cap. The outer wall of the sealing ring engages with a groove in the inner wall of the cap, while the first and second limiting protrusions on the outer wall of the annular plug firmly hold the inner side of the sealing ring. This multi-layered, multi-structured sealing design significantly improves the sealing performance of the bottle cap and effectively prevents milk spoilage and leakage.

[0015] The tear strip on the bottom side of the cap allows users to easily open the bottle cap without using excessive force, avoiding the risk of damage to the bottle cap or injury to the user. The anti-slip design on the outer wall of the tear strip further increases the stability and convenience of opening.

[0016] The outer wall of the annular stopper is beveled, the outer wall of the first stopper is curved, and the outer wall of the second stopper is beveled, forming a specific angle with the outer surface of the annular stopper. These designs not only enhance the structural stability of the bottle cap but also prevent wear and aging over time, extending its service life. The concave ring design at the top of the body allows for easy insertion of a straw, allowing for drinking without opening the cap, making it more convenient to use the milk bottle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Fig. 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Fig. 2 This is one of the internal structure diagrams of the present utility model;

[0019] Fig. 3 This is the second schematic diagram of the internal structure of the present utility model;

[0020] The meaning of each number in the figure is:

[0021] 1. Cover body; 11. Protruding ring; 12. Groove; 13. Concave ring; 2. Tear strip; 21. Anti-slip strip; 3. Annular plug; 31. First limiting protrusion; 32. Second limiting protrusion; 4. Sealing ring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] The utility model provides a milk bottle cap with high sealing performance, such as Figs. 1-3 As shown, it includes a cap body 1, an annular plug 3 is installed in the middle of the inner side of the cap body 1, and the inner wall of the cap body 1 is provided with an annular groove 12. A sealing ring 4 is provided between the outer wall of the annular plug 3 and the inner wall of the cap body 1. The outer wall of the sealing ring 4 is engaged with the groove 12. The outer wall of the annular plug 3 is provided with an annular first limiting protrusion 31 and a second limiting protrusion 32 at the upper and lower parts of the inner side near the sealing ring 4, respectively. The inner side of the sealing ring 4 is clamped between the first limiting protrusion 31 and the second limiting protrusion 32. The sealing ring 4 is cleverly provided between the annular plug 3 installed in the middle of the inner side of the cap body 1 and the inner wall of the cap body 1. This design constitutes a first sealing barrier. The outer wall of the sealing ring 4 is tightly engaged with the annular groove 12 on the inner wall of the cap body 1, ensuring the stability and sealing of the sealing ring 4 when the bottle cap is closed.

[0024] Furthermore, annular stopper 3 is provided with a first and second annular stopper protrusions 31 and 32, respectively, at the top and bottom of its outer wall. These two stopper protrusions not only enhance the structural strength of the annular stopper 3 but also provide a crucial role in limiting and securing the seal. The inner side of the sealing ring 4 is firmly clamped between the first and second stopper protrusions 31 and 32. This snap-fitting arrangement significantly enhances the stability and sealing performance of the sealing ring 4, forming a second sealing barrier.

[0025] In this embodiment, the outer wall of the annular stopper 3 is designed to be inclined, so that the bottle mouth can be smoothly inserted between the outer wall of the annular stopper 3 and the inner wall of the cover body 1.

[0026] Specifically, a tear strip 2 is provided on one side of the bottom of the cover body 1, and a convex ring 11 is provided on the inner wall of the cover body 1. The convex ring 11 is connected to the tear strip 2, and an annular groove 12 is provided on the upper part of the convex ring 11. The provision of the tear strip 2 enables the user to easily open the bottle cap without the use of additional tools or excessive force, thereby improving the convenience of use. The connection between the convex ring 11 and the tear strip 2 enhances the structural strength of the tear strip 2, preventing it from being torn or damaged during the opening process. At the same time, the annular groove 12 on the upper part of the convex ring 11 provides a stable clamping position for the sealing ring 4, ensuring that the sealing ring 4 is correctly installed and tightly fitted when the bottle cap is closed.

[0027] Furthermore, the outer wall of the tear strip 2 is provided with an anti-slip strip 21. The provision of the anti-slip strip 21 increases the roughness of the outer wall of the tear strip 2, making it easier for the user to grasp the tear strip 2 when opening the bottle cap, preventing the user from slipping and causing opening failure or the bottle cap to fall off, thereby improving the safety and stability of use.

[0028] Furthermore, a concave ring 13 is provided on the top of the cover body 1 to facilitate the insertion of the straw.

[0029] Furthermore, the second limiting protrusion 32 is positioned opposite to the convex ring 11, and the outer wall of the convex ring 11 is a curved surface structure, thereby ensuring the horizontal and stable setting of the sealing ring 4.

[0030] Furthermore, the outer wall of the second limiting protrusion 32 is a sloped structure, and the included angle between the slope and the outer surface of the annular plug 3 is 120 degrees. This design makes it easier for the second limiting protrusion 32 to guide the sealing ring 4 into the correct position when the bottle cap is closed, and ensures that the sealing ring 4 is firmly clamped between the first limiting protrusion 31 and the second limiting protrusion 32, thereby improving the reliability and stability of the seal.

[0031] Furthermore, the outer wall of the first limiting protrusion 31 is a curved surface structure. This design not only enhances the structural strength of the first limiting protrusion 31, but also provides better guidance and support for the sealing ring 4 during installation, ensuring that the sealing ring 4 can be smoothly clamped between the first limiting protrusion 31 and the second limiting protrusion 32, thereby improving the tightness and durability of the seal.

[0032] When using the milk bottle cap with high sealing performance of the present invention, the user first needs to align the milk bottle cap with the bottle mouth of the milk bottle. Since the outer wall of the annular plug 3 is designed as an inclined surface, this design helps the bottle mouth to be smoothly inserted between the outer wall of the annular plug 3 and the inner wall of the cover body 1.

[0033] As the bottle cap is rotated and pressed down, the sealing ring 4 begins to contact the annular groove 12 on the inner wall of the cap body 1. The outer wall of the sealing ring 4 is tightly engaged with the annular groove 12, which ensures the stability and initial sealing of the sealing ring 4 when the bottle cap is closed.

[0034] The first and second stopper projections 31 and 32 on the outer wall of the annular plug 3 come into play. The inner side of the sealing ring 4 is firmly clamped by these two stopper projections, forming a stable and tight seal. This snap-fitting design significantly improves the stability and sealing performance of the sealing ring 4, forming a second sealing barrier.

[0035] When the bottle cap is fully tightened, a complete sealing system is formed between the annular plug 3, the sealing ring 4 and the inner wall of the cap body 1. The sealing ring 4 is fixed by the double limiting protrusions and can maintain a stable sealing state for a long time, effectively preventing leakage and deterioration of milk.

[0036] The user first prepares to open the bottle cap by grasping the outer wall of the tear strip 2 on the top of the cap body 1 (the anti-slip strip 21 increases the stability of the grip).

[0037] The user applies a pulling force along the tear strip 2. Since the tear strip 2 is connected to the convex ring 11 on the inner wall of the lid 1, this design enhances the structural strength of the tear strip 2. As the pulling force increases, the connection between the tear strip 2 and the lid 1 gradually separates, and finally the bottle cap can be easily opened.

[0038] When the tear strip 2 is completely separated from the cover 1, the seal between the bottle cap and the bottle opening is broken, and the user can easily remove the bottle cap from the bottle opening. At this point, the milk bottle cap has completed its opening process, and the user can conveniently drink milk or perform other operations. The user can also use a straw to pierce the concave ring 13 to drink milk without opening the cover 1.

[0039] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A milk bottle cap with high sealing performance, comprising a cap body (1), characterized in that: An annular plug (3) is installed in the middle of the inner side of the cover body (1), and an annular groove (12) is provided on the inner wall of the cover body (1). A sealing ring (4) is provided between the outer wall of the annular plug (3) and the inner wall of the cover body (1), and the outer wall of the sealing ring (4) is engaged with the groove (12). An annular first limiting protrusion (31) and a second limiting protrusion (32) are respectively provided on the upper and lower parts of the inner side of the outer wall of the annular plug (3) near the sealing ring (4), and the inner side of the sealing ring (4) is clamped between the first limiting protrusion (31) and the second limiting protrusion (32).

2. The highly airtight milk bottle cap according to claim 1, characterized in that: The outer wall of the annular plug (3) is designed as a slope.

3. The highly airtight milk bottle cap according to claim 1, characterized in that: A tear strip (2) is provided on one side of the bottom of the cover body (1), a convex ring (11) is provided on the inner wall of the cover body (1), the convex ring (11) is connected to the tear strip (2), and an annular groove (12) is provided on the upper part of the convex ring (11).

4. The highly airtight milk bottle cap according to claim 3, characterized in that: The outer wall of the tear strip (2) is provided with an anti-slip strip (21).

5. The highly airtight milk bottle cap according to claim 1, characterized in that: A concave ring (13) is provided on the top of the cover body (1).

6. The highly airtight milk bottle cap according to claim 1, characterized in that: The second limiting protrusion (32) is located opposite to the convex ring (11), and the outer wall of the convex ring (11) is a curved surface structure.

7. The highly airtight milk bottle cap according to claim 1, characterized in that: The outer wall of the second limiting protrusion (32) is a slope structure, and the angle between the slope and the outer surface of the annular plug (3) is 120 degrees.

8. The highly airtight milk bottle cap according to claim 1, characterized in that: The outer wall of the first limiting protrusion (31) is a curved surface structure.

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