A top-open bottle cap structure

Abstract

The present application relates to the technical field of bottle cap, and particularly discloses a top-opening bottle cap structure, which comprises a wine pouring spout fixedly installed on a bottle mouth, a passage for liquid outflow in the bottle is arranged on the wine pouring spout, a seal cover capable of being removed is arranged at a liquid outlet of the wine pouring spout, an outer cover is arranged outside the wine pouring spout, the wine pouring spout and the seal cover are located in the outer cover when the bottle cap is assembled and not opened, the outer cover comprises an outer cover sidewall with an upper opening and a lower opening, the inner diameter of the outer cover sidewall is greater than the outer diameter of the bottle mouth of the wine bottle, a top-opening sheet is connected to the upper opening of the outer cover sidewall, an inner thread is arranged on the inner surface of the outer cover sidewall, an outer thread is arranged on the wine pouring spout and engaged with the inner thread, the outer thread drives the outer cover to move downward relative to the bottle mouth when the outer cover is counterclockwise rotated, and the seal cover opens the top-opening sheet. The bottle cap has few component parts, a simple overall structure, can shorten the length of the bottle cap, and is suitable for wine bottles with short bottle mouths.

Description

Technical Field

[0001] This invention relates to the field of bottle cap technology, specifically a top-opening bottle cap structure. Background Technology

[0002] Bottled baijiu (Chinese liquor) is typically packaged in glass or ceramic bottles. Traditional anti-counterfeiting caps are easily removed from the bottle opening, making them easy to counterfeit and reused in the production of fake liquor. To improve anti-counterfeiting effectiveness, most baijiu bottles on the market currently use pry-off caps. However, pry-off caps require a special pry key and are relatively difficult to pry open, often producing fragments. There are also screw-on anti-counterfeiting caps, such as top-opening caps, which generally consist of an outer cap, a pouring spout, a sealing cap, an inner stopper, and an inner sleeve. The outer cap has a breaking mechanism; when the outer cap is turned, the pouring spout inside breaks the breaking mechanism, achieving an anti-counterfeiting effect. However, this type of cap has a more complex structure and a longer length, making it unsuitable for bottles with shorter openings. Summary of the Invention

[0003] To address the problem of complex structures in existing top-opening anti-counterfeiting bottle caps, this invention provides a simple top-opening bottle cap structure with fewer components.

[0004] To solve the above-mentioned technical problems, the present invention includes a pouring spout fixedly installed on the bottle mouth, the pouring spout having a channel for the liquid inside the bottle to flow out, a removable sealing cap at the outlet of the pouring spout, and an outer cap on the outside of the pouring spout. The structural features are as follows: when the bottle cap is assembled and not opened, the pouring spout and the sealing cap are located inside the outer cap; the outer cap includes an outer cap sidewall with openings at the top and bottom, the inner diameter of the outer cap sidewall being larger than the outer diameter of the bottle mouth; a top-opening piece is connected to the upper opening of the outer cap sidewall; an internal thread is provided on the inner surface of the outer cap sidewall; the pouring spout has an external thread that engages with the internal thread; when the outer cap is rotated counterclockwise, the external thread drives the outer cap to move downwards relative to the bottle mouth, and the sealing cap pushes open the top-opening piece.

[0005] With the above structure, the pouring spout is fixedly installed on the bottle neck. The pouring spout has a channel for the liquid inside the bottle to flow out, meaning the internal space of the bottle can communicate with the outside through the pouring spout. A sealing cap is installed at the outlet of the pouring spout. When the bottle cap is closed, the sealing cap prevents the liquid inside the bottle from evaporating or flowing out. When the bottle cap is assembled and installed on the bottle neck, the pouring spout and the sealing cap are located inside the outer cap when the bottle cap is closed. When opening the bottle cap, the outer cap is rotated counterclockwise. The outer cap and the pouring spout are connected by threads. Since the pouring spout is fixedly installed on the bottle neck and the sealing cap is located on the pouring spout, the pouring spout and the sealing cap are connected during the bottle cap opening process. With the cap in place and its inner diameter larger than the bottle opening's outer diameter, the outer cap moves downward relative to the bottle opening under the drive of the spout's external thread. The top flap on the upper part of the outer cap also tends to move downward. Since the spout and the cap remain stationary, the top flap exerts downward pressure on the cap. According to the principle of reciprocity of forces, the cap exerts upward pressure on the top flap. When the upward pressure from the cap reaches a certain value, the top flap is pushed open, breaking the connection between the top flap and the outer cap. The outer cap continues to move downward, exposing the cap and the spout. Removing the cap allows the liquid inside the bottle to be poured out. The bottle cap of this invention includes an outer cap, a pouring spout, and a sealing plug. With fewer components, the length of the cap can be reduced, making it suitable for bottles with short openings. After assembly, the pouring spout and sealing plug are located inside the outer cap, resulting in a simple overall structure. The outer cap and the pouring spout are connected by threads, and a sealing cap is installed at the outlet of the pouring spout. The connection between the various parts is relatively simple. The presence of an intact top flap indicates whether the bottle cap has been opened, thus serving as an anti-counterfeiting measure.

[0006] The pouring nozzle includes a guide tube inserted into the bottle opening, the upper end of the guide tube having an outwardly protruding boss, and the boss having an upwardly protruding liquid outlet tube.

[0007] A flow-limiting disc is provided above the flow guide tube. The flow-limiting disc is connected to the boss through multiple connecting ribs. A gap is provided between adjacent connecting ribs for the liquid in the bottle to flow out. The flow-limiting disc and connecting ribs are located inside the liquid outlet tube.

[0008] The upper end of the liquid outlet pipe is provided with an outwardly protruding reverse edge to prevent liquid backflow.

[0009] The sealing cap includes a top surface, and the lower surface of the top surface of the sealing cap is connected to a side wall that can be inserted into the liquid outlet pipe and is in close contact with the inner wall of the liquid outlet pipe. The outer surface of the side wall of the sealing cap is provided with at least one outwardly protruding sealing ring.

[0010] The outer edge of the boss is connected to a flange, the external thread is provided on the outer surface of the flange, and the internal thread is provided on the upper half of the inner surface of the outer cover sidewall.

[0011] The lower half of the inner surface of the outer cover sidewall has multiple recessed anti-reverse vertical grooves, and the upper end of the anti-reverse vertical grooves forms a baffle with the outer cover sidewall.

[0012] The lower outer side of the guide tube is provided with an outer ring, and there is a gap between the guide tube and the outer ring that allows the side wall of the bottle mouth to be inserted. The outer ring is fixedly connected to the flange by multiple anti-rotation ribs to prevent the pouring spout from rotating relative to the bottle mouth.

[0013] The outer ring is provided with multiple bottle-hanging springs to prevent the pouring spout from detaching from the bottle mouth; the outer surface of the outer ring is provided with multiple elastic anti-reverse plates that are inserted into the anti-reverse vertical groove and can prevent the outer cap from being screwed back clockwise.

[0014] The outer side of the flow guide tube is fitted with an inner plug for sealing the gap between the pouring spout and the bottle mouth. The side wall of the inner plug includes a lower sealing side wall and an upper sealing side wall. The diameter of the lower sealing side wall is smaller than the diameter of the upper sealing side wall. The lower sealing side wall and the upper sealing side wall are connected by a connecting section. The side wall of the inner plug is inserted into the bottle mouth. The lower sealing side wall is in contact with the outer surface of the flow guide tube, and the upper sealing side wall is in contact with the inner surface of the bottle mouth.

[0015] The top-opening bottle cap structure of this invention mainly includes an outer cap, a pouring spout, and a sealing cap. To improve the sealing effect, an inner plug is also provided between the pouring spout and the bottle mouth. The bottle cap has few components. After the bottle cap is assembled, the pouring spout and the sealing cap are located inside the outer cap. The overall structure of the bottle cap is simple and can shorten the length of the bottle cap to adapt to bottles with shorter mouths. The bottle mouth clip on the pouring spout can prevent the pouring spout from detaching from the bottle mouth, and the anti-rotation rib can prevent the pouring spout from rotating relative to the bottle mouth, so that the pouring spout is fixedly installed on the bottle mouth. The inner surface of the outer cap has an anti-reverse vertical groove, and the elastic anti-reverse piece on the pouring spout can prevent the outer cap from being twisted back clockwise. Under the interaction of the elastic anti-reverse piece and the anti-reverse vertical groove, when the outer cap is opened, it cannot be twisted back to its original position, which has an anti-counterfeiting effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the outer cover structure; Figure 2 This is a schematic diagram of the sealing cap structure; Figure 3 This is a schematic diagram of the structure of a wine pouring spout; Figure 4 This is a schematic diagram of the inner plug structure; Figure 5 This is the external side view of the outer cap, and also the external side view of the cap assembly. Figure 6 This is a schematic diagram of the structure after the bottle cap is assembled; Figure 7 This is a schematic diagram of the bottle opening structure; Figure 8 This is a diagram illustrating the bottle cap opening process, in which... Figure 8 (a) is a schematic diagram of the bottle cap installed on the bottle neck and not yet opened. Figure 8 (b) is a schematic diagram showing the top flap being pushed down after the outer cover is turned counterclockwise. Figure 8 (c) is a schematic diagram after the sealing cap has been removed; In the diagram: 1. Outer cap; 11. Outer cap sidewall; 12. Top opening piece; 13. Top opening piece connection point; 14. Left-hand internal thread; 15. Anti-reverse groove; 16. Baffle; 17. Anti-slip vertical groove; 18. Marking area; 2. Sealing cap; 21. Top surface of sealing cap; 211. Ring edge; 22. Sealing cap sidewall; 23. Sealing ring; 3. Pouring spout; 31. Guide tube; 32. Boss; 33. Discharge tube; 331. 34. Flanged edge; 35. Left-hand external thread; 36. Flow limiting plate; 37. Connecting rib; 38. Outer ring; 39. Bottle neck spring; 310. Elastic anti-reverse plate; 311. Anti-rotation rib; 4. Inner plug; 41. Lower sealing sidewall; 42. Upper sealing sidewall; 43. Connecting section; 44. Base; 45. Raised ring; 5. Bottle neck; 51. Bottle neck sidewall; 52. Groove; 53. Anti-rotation tooth; 54. Raised edge. Detailed Implementation

[0017] Reference Figure 1-8 The present invention provides a top-opening bottle cap structure suitable for bottle caps of liquor bottles such as baijiu, including an outer cap 1, a sealing cap 2, a pouring spout 3, and may also include an inner plug 4.

[0018] Reference Figure 1 , 56. The outer cap 1 is located outside the assembled bottle cap. The bottle cap can be opened by turning the outer cap 1 counterclockwise. The outer cap 1 includes upper and lower opening outer cap sidewalls 11. The inner diameter of the outer cap sidewalls 11 is larger than the outer diameter of the bottle mouth 5, allowing the outer cap 1 to move downwards relative to the bottle mouth 5 when the bottle cap is opened. A top-opening tab 12 is connected to the upper opening of the outer cap sidewalls 11. The top-opening tab 12 is fixedly connected to the inner edge of the upper opening of the outer cap sidewalls 11 through multiple top-opening tab connection points 13. The top-opening tab connection points 13 typically use easily broken ribs. When the top-opening tab 12 is subjected to a certain pressure, the easily broken ribs break. A QR code is provided on the inner and outer surfaces of the top-opening tab 12. Product information or prize redemption can be obtained by scanning a QR code; the upper half of the inner surface of the outer cap sidewall 11 is provided with a left-hand internal thread 14, which engages with the left-hand external thread 35 on the pouring spout 3. When the outer cap 1 is turned counterclockwise, while the left-hand external thread 35 remains stationary, the left-hand external thread 35 drives the outer cap 1 to move downward relative to the bottle mouth 5. The opening piece 12 is subjected to upward pressure by the sealing cap 2, the opening piece connection point 13 breaks, and the opening piece 12 is opened; the lower half of the inner surface of the outer cap sidewall 11 is provided with multiple recessed anti-reverse vertical grooves 15, and adjacent anti-reverse vertical grooves 15 are spaced apart. The upper end of the anti-reverse vertical groove 15 and the side wall 11 of the outer cover form a baffle 16. The anti-reverse vertical groove 15 cooperates with the elastic anti-reverse piece 310 on the pouring spout 3. The elastic anti-reverse piece 310 is inserted into the anti-reverse vertical groove 15. When the outer cover 1 rotates counterclockwise, the anti-reverse vertical groove 15 can squeeze the elastic anti-reverse piece 310 to deform, so that the elastic anti-reverse piece 310 moves from one anti-reverse vertical groove 15 into the adjacent anti-reverse vertical groove 15. After the elastic anti-reverse piece 310 enters the adjacent anti-reverse vertical groove 15, the deformation disappears and it returns to its original shape. When the outer cover 1 rotates clockwise, the elastic anti-reverse piece 310 presses against the spacer rib between the anti-reverse vertical grooves 15, preventing the outer cover 1 from rotating clockwise. The rotating, anti-reverse structure is existing technology, and its structure and shape will not be described in detail here. Therefore, when the bottle cap is opened, the outer cap 1 cannot return to its original position. The position of the outer cap 1 can be used to determine whether the bottle cap has been opened. When the outer cap 1 moves downward to the position where the stop 16 touches the elastic anti-reverse piece 310, the outer cap 1 cannot be turned further. At this time, the position of the outer cap 1 is the position after the bottle cap is opened. The upper half of the outer surface of the outer cap side wall 11 is provided with multiple anti-slip vertical grooves 17 to increase the friction between the hand and the outer cap 1, making it easier to turn the outer cap 1. The lower half of the outer cap side wall 11 is the marking area 18, where information such as alcohol content and opening direction can be hot-stamped. Figure 6 As shown, when the bottle cap is assembled but not yet opened, the pouring spout 3, sealing cap 2, and inner plug 4 are located inside the outer cap 1, and only the outer cap 1 can be seen from the side.

[0019] Reference Figure 2 , 6The sealing cap 2 is inserted into the outlet of the pouring spout 3 to seal the bottle and prevent the liquid inside from flowing out and evaporating. When pouring, the sealing cap 2 is removed from the pouring spout 3. The sealing cap 2 includes a top surface 21. The top surface 21 has a ring edge 211 that slopes downward and outward to increase the strength of the sealing cap 2. Alternatively, the ring edge 211 can be omitted. The lower surface of the top surface 21 is connected to a sealing cap side wall 22 that can be inserted into the outlet pipe 33 of the pouring spout 3. The outer surface of the sealing cap side wall 22 is in contact with the inner wall of the outlet pipe 33. To enhance the sealing performance of the sealing cap 2, the outer surface of the sealing cap side wall 22 has at least one outwardly protruding sealing ring 23. In the figure, the outer surface of the sealing cap side wall 22 has two sealing rings 23.

[0020] Reference Figure 3 , 6 The pouring spout 3 is fixedly installed on the bottle neck 5 of the wine bottle. The pouring spout 3 has a channel for the liquid inside the bottle to flow out, that is, the internal space of the bottle is connected to the outside through the pouring spout 3. Specifically, the pouring spout 3 includes a guide tube 31, which can be inserted into the bottle neck 5. The upper end of the guide tube 31 has an outwardly protruding boss 32, which cannot enter the bottle neck 5. The boss 32 has an upwardly protruding liquid outlet tube 33, and the upper end of the liquid outlet tube 33 has an outwardly protruding reverse edge 331, which prevents the liquid from flowing back. A flow limiter is located above the guide tube 31. The flow-limiting disc 36 obstructs the liquid flow during pouring, preventing excessive outflow. It is connected to the boss 32 via multiple connecting ribs 37, with gaps between adjacent ribs. The liquid flows out through these gaps. The flow-limiting disc 36 and connecting ribs 37 are located within the outlet pipe 33. After flowing through the gaps between the ribs 37, the liquid flows outward along the inner wall of the outlet pipe 33. A gap remains between the outlet pipe 33 and the connecting ribs 37, and the sealing cap sidewall 22 is inserted into this gap. A flange 34 is connected to the outer edge of the boss 32. The flange 34 extends downward along the outer edge of the boss 32. A left-hand external thread 35 is provided on the outer surface of the flange 34. This thread engages with the left-hand internal thread 14 of the outer cap sidewall 11. The left-hand external thread 35 can be segmented, not a continuous thread. Figure 3As shown, an outer ring 38 is provided on the lower outer side of the guide tube 31, and a gap is provided between the guide tube 31 and the outer ring 38. The bottle mouth sidewall 51 of the bottle mouth 5 can be inserted into the gap between the guide tube 31 and the outer ring 38. The outer ring 38 is fixedly connected to the flange 34 by multiple anti-rotation ribs 311. The anti-rotation ribs 311 cooperate with the anti-rotation teeth 53 on the bottle mouth 5. When the pouring spout 3 has a tendency to rotate, the anti-rotation teeth 53 prevent the anti-rotation ribs 311 from rotating, so that the pouring spout 3 cannot rotate relative to the bottle mouth 5. The outer ring 38 is provided with multiple bottle mouth hanging springs 39. The bottle mouth hanging springs 39 are inclined upward and inward. The bottle mouth hanging springs 39 cooperate with the grooves 52 on the bottle mouth 5. The bottle mouth hanging springs 39 are inclinedly inserted into the grooves 52. 2. When the spout 3 tends to detach upwards relative to the bottle mouth 5, the groove 52 blocks the bottle mouth spring 39 to prevent the spout 3 from detaching from the bottle mouth 5. The outer surface of the outer ring 38 is provided with multiple elastic anti-reverse plates 310. The elastic anti-reverse plates 310 are inserted into the anti-reverse vertical grooves 15 on the inner surface of the outer cover 1. The elastic anti-reverse plates 310 cooperate with the anti-reverse vertical grooves 15. When the outer cover 1 rotates counterclockwise, the anti-reverse vertical grooves 15 can slide through different elastic anti-reverse plates 310. The elastic anti-reverse plates 310 enter the adjacent anti-reverse vertical grooves 15 from the anti-reverse vertical grooves 15. When the outer cover 1 is screwed back clockwise, the elastic anti-reverse plates 310 block the spacer ribs of the anti-reverse vertical grooves 15 to prevent the outer cover 1 from rotating clockwise.

[0021] Reference Figure 4 , 6 The inner stopper 4 seals the gap between the pouring spout 3 and the bottle mouth 5. The inner stopper 4 can be inserted into the bottle mouth 5 and is fitted over the outside of the guide tube 31. The sidewalls of the inner stopper 4 include a lower sealing sidewall 41 and an upper sealing sidewall 42. The lower sealing sidewall 41 is tightly fitted to the outer surface of the guide tube 31, and the upper sealing sidewall 42 is tightly fitted to the inner surface of the bottle mouth 5. The diameter of the lower sealing sidewall 41 is smaller than the diameter of the upper sealing sidewall 42. The inner wall 41 is connected to the upper sealing side wall 42 by a connecting section 43; the lower end of the side wall of the inner plug 4 is provided with a foot 44 that protrudes inward. When the inner plug 4 is fitted onto the outside of the guide tube 31, the lower end of the guide tube 31 can abut against the foot 44. The upper end of the side wall of the inner plug 4 is provided with a convex ring 45 that protrudes outward. The convex ring 45 can strengthen the inner plug 4 and facilitate the removal and installation of the inner plug 4. Of course, the foot 44 and the convex ring 45 can also be omitted.

[0022] Reference Figure 6 , 7The bottle mouth 5 is used in conjunction with the bottle cap, but is not part of the bottle cap. The bottle mouth 5 includes a bottle mouth sidewall 51, and a groove 52 is formed on the outer surface of the bottle mouth sidewall 51. The groove 52 is used in conjunction with the bottle mouth clip 39 on the pouring spout 3 to prevent the pouring spout 3 from detaching from the bottle mouth 5. Multiple anti-rotation teeth 53 are provided on the periphery of the outer surface of the bottle mouth sidewall 51. There is a gap between adjacent anti-rotation teeth 53, and the gap corresponds one-to-one with the anti-rotation ribs 311 on the pouring spout 3. 311 is inserted into the gap between the anti-rotation teeth 53. The anti-rotation rib 311 cooperates with the anti-rotation teeth 53 and prevents the pouring spout 3 from rotating relative to the bottle mouth 5. Below the anti-rotation teeth 53 of the bottle mouth 5, there is a ring of outwardly protruding flange 54. After the bottle cap is pressed into the bottle mouth 5, the lower end of the outer ring 38 abuts against the flange 54. Alternatively, the flange 54 can be omitted. When pressing, the bottle cap cannot be pressed further down when the upper end of the side wall 51 of the bottle mouth abuts against the flange 45.

[0023] It should be noted that the above-mentioned terms such as "up," "down," "left," and "right" are used to describe the bottle cap as shown in the attached drawings and do not limit the structure of the bottle cap of the present invention. Since the bottle cap is assembled by pressing and inserting, the outer cap 1 is usually made of ABS material, the sealing cap 2 and the inner plug 4 are usually made of LDPE material, and the pouring spout 3 is usually made of PET material.

[0024] Reference Figure 6 , 8 (a) Assembly and installation of the bottle cap: Place the inner plug 4 on the outside of the guide tube 31 of the pouring spout 3. Insert the inner plug 4 upward along the outer surface of the guide tube 31 until the lower end of the guide tube 31 abuts against the bottom foot 44 of the inner plug 4. Then press the sealing cap 2 onto the liquid outlet tube 33 of the pouring spout 3. Insert the side wall 22 of the sealing cap along the inner wall of the liquid outlet tube 33 into the gap between the liquid outlet tube 33 and the connecting rib 37 until the upper end of the liquid outlet tube 33 abuts against the lower surface of the top surface 21 of the sealing cap. After the inner plug 4, the pouring spout 3, and the sealing cap 2 are assembled, put the outer cap 1 on the outside of the pouring spout 3 from top to bottom. When the left-hand internal thread 14 of the outer cap 1 begins to engage with the left-hand external thread 35 of the pouring spout 3, rotate the outer cap 1 counterclockwise. When the top opening piece 12 contacts the upper surface of the top surface 21 of the sealing cap, stop turning the outer cap 1. The bottle cap assembly is complete. The assembled bottle cap is as follows: Figure 6 As shown; the assembled bottle cap is pressed onto the bottle neck 5. During the pressing process, the anti-rotation rib 311 on the pouring spout 3 avoids the anti-rotation teeth 53 on the bottle neck 5. After pressing, the anti-rotation rib 311 is located in the gap between the anti-rotation teeth 53. When the outer ring 38 abuts against the protruding edge 54, the bottle cap pressing is completed. At this time, the bottle neck clip 39 enters the groove 52. Figure 8(a) is a schematic diagram of the bottle cap after it has been pressed in and is not opened. Since the bottle neck spring 39 is located in the groove 52, when the pouring spout 3 moves upward, the top wall of the groove 52 blocks the bottle neck spring 39, thereby preventing the pouring spout 3 from detaching from the bottle mouth 5. When the pouring spout 3 is subjected to torque and has a tendency to rotate, the anti-rotation tooth 53 on the bottle mouth 5 blocks the anti-rotation rib 311 on the pouring spout 3, preventing the pouring spout 3 from rotating. By setting the bottle neck spring 39 and the anti-rotation rib 311 on the pouring spout 3, the pouring spout 3 is fixedly installed on the bottle mouth 5. The elastic anti-reverse piece 310 on the pouring spout 3 cooperates with the anti-reverse vertical groove 15 on the outer cap 1. The elastic anti-reverse piece 310 is located in the anti-reverse vertical groove 15 and rotates counterclockwise. When the outer cap 1 is rotated, the spacer ribs between the anti-reverse grooves 15 compress the elastic anti-reverse piece 310, causing the elastic anti-reverse piece 310 to deform. This allows the spacer ribs to slide past the elastic anti-reverse piece 310, and the elastic anti-reverse piece 310 moves from the anti-reverse groove 15 into the adjacent anti-reverse groove 15. At the same time, the deformation of the elastic anti-reverse piece 310 disappears. When the outer cap 1 is rotated clockwise, the elastic anti-reverse piece 310 blocks the spacer ribs, preventing the outer cap 1 from rotating clockwise. Therefore, the outer cap 1 can only rotate counterclockwise. The inner stopper 4 seals the gap between the pouring spout 3 and the bottle mouth 5, and the sealing cap 2 seals the outlet of the pouring spout 3 to prevent the liquid inside the bottle from evaporating. The liquid inside the bottle will not flow out when the bottle is tilted. (II) Method for opening the bottle cap: Rotate the outer cap 1 counterclockwise by hand or with a clamp. Since the pouring spout 3 remains stationary, the left-hand external thread 35 on the pouring spout 3 drives the outer cap 1 downward. The top opening piece 12 at the upper end of the outer cap 1 is subjected to upward pressure from the sealing cap 2. When a certain pressure value is reached, the top opening piece connection point 13 between the top opening piece 12 and the side wall 11 of the outer cap breaks, and the top opening piece 12 is opened. Figure 8 As shown in (b), continue to rotate the outer cover 1 counterclockwise. The outer cover 1 continues to move downwards. When the baffle 16 touches the elastic anti-reverse piece 310, stop rotating the outer cover 1. At this time, the upper part of the sealing cap 2 and the pouring spout 3 protrudes from the outer cover 1. Remove the sealing cap 2 from the pouring spout 3, as shown in (b). Figure 8 As shown in (c), the bottle cap is open at this time, and the liquid inside the bottle can be poured out. Since the outer cap 1 cannot be screwed back counterclockwise, the outer cap 1 cannot be reset after the bottle cap is opened. The position of the outer cap 1 and whether the top opening piece 12 remains on the outer cap 1 can indicate whether the bottle cap has been opened, which serves as an anti-counterfeiting measure.

[0025] The top-opening bottle cap structure of this invention includes an outer cap, a sealing cap, a pouring spout, and an inner stopper. With fewer components, when the bottle cap is assembled and not opened, the sealing cap, pouring spout, and inner stopper are located inside the outer cap. The structure is simple and can shorten the overall length of the bottle cap, making it suitable for bottles with short openings. The outer cap has a top-opening tab; turning the outer cap counterclockwise opens the bottle cap. When the bottle cap is opened, the top-opening tab is pushed open by the sealing cap. After the bottle cap is opened, the outer cap cannot be reset. The position of the top-opening tab and the outer cap indicates whether the bottle cap is open, thus providing a certain degree of anti-counterfeiting protection.

Claims

1. A top-opening bottle cap structure, comprising a pouring spout (3) fixedly installed on the bottle mouth (5), the pouring spout (3) having a channel for liquid to flow out of the bottle, a removable sealing cap (2) at the liquid outlet of the pouring spout (3), and an outer cap (1) on the outside of the pouring spout (3), characterized in that: When the bottle cap is assembled and not opened, the pouring spout (3) and the sealing cap (2) are located inside the outer cap (1). The outer cap (1) includes an outer cap sidewall (11) with openings at the top and bottom. The inner diameter of the outer cap sidewall (11) is larger than the outer diameter of the bottle mouth (5). A top opening piece (12) is connected to the upper opening of the outer cap sidewall (11). An internal thread is provided on the inner surface of the outer cap sidewall (11). An external thread that meshes with the internal thread is provided on the pouring spout (3). When the outer cap (1) is rotated counterclockwise, the external thread drives the outer cap (1) to move downward relative to the bottle mouth (5), and the sealing cap (2) pushes open the top opening piece (12).

2. The top-opening bottle cap structure according to claim 1, characterized in that: The pouring nozzle (3) includes a guide tube (31) inserted into the bottle mouth (5). The upper end of the guide tube (31) is provided with an outward protrusion (32), and the protrusion (32) is provided with an upward protruding liquid outlet tube (33).

3. The top-opening bottle cap structure according to claim 2, characterized in that: A flow limiting plate (36) is provided above the flow guide pipe (31). The flow limiting plate (36) is connected to the boss (32) through multiple connecting ribs (37). A gap for liquid to flow out of the bottle is provided between adjacent connecting ribs (37). The flow limiting plate (36) and the connecting ribs (37) are located inside the liquid outlet pipe (33).

4. The top-opening bottle cap structure according to claim 2, characterized in that: The upper end of the liquid outlet pipe (33) is provided with an outwardly protruding anti-backflow edge (331) to prevent liquid backflow.

5. The top-opening bottle cap structure according to claim 2, characterized in that: The sealing cap (2) includes a top surface (21) of the sealing cap, and a side wall (22) of the sealing cap is connected to the lower surface of the top surface (21) of the sealing cap, which can be inserted into the liquid outlet pipe (33) and is in close contact with the inner wall of the liquid outlet pipe (33). At least one outwardly protruding sealing ring (23) is provided on the outer surface of the side wall (22) of the sealing cap.

6. The top-opening bottle cap structure according to claim 2, characterized in that: The outer edge of the boss (32) is connected to a flange (34), the external thread is provided on the outer surface of the flange (34), and the internal thread is provided on the upper half of the inner surface of the outer cover sidewall (11).

7. The top-opening bottle cap structure according to claim 6, characterized in that: The lower half of the inner surface of the outer cover sidewall (11) has multiple recessed anti-reverse vertical grooves (15), and the upper end of the anti-reverse vertical grooves (15) forms a baffle (16) with the outer cover sidewall (11).

8. The top-opening bottle cap structure according to claim 7, characterized in that: The lower outer side of the guide tube (31) is provided with an outer ring (38), and there is a gap between the guide tube (31) and the outer ring (38) into which the bottle mouth sidewall (51) of the bottle mouth (5) can be inserted. The outer ring (38) is fixedly connected to the flange (34) by multiple anti-rotation ribs (311) used to prevent the pouring spout (3) from rotating relative to the bottle mouth (5).

9. The top-opening bottle cap structure according to claim 8, characterized in that: The outer ring (38) is provided with multiple bottle mouth clips (39) to prevent the pouring spout (3) from detaching from the bottle mouth (5); the outer surface of the outer ring (38) is provided with multiple elastic anti-reverse clips (310) that are inserted into the anti-reverse vertical groove (15) and can prevent the outer cover (1) from being screwed back clockwise.

10. The top-opening bottle cap structure according to claim 8, characterized in that: The outer side of the guide tube (31) is fitted with an inner plug (4) for sealing the gap between the pouring spout (3) and the bottle mouth (5). The side wall of the inner plug (4) includes a lower sealing side wall (41) and an upper sealing side wall (42). The diameter of the lower sealing side wall (41) is smaller than the diameter of the upper sealing side wall (42). The lower sealing side wall (41) and the upper sealing side wall (42) are connected by a connecting section (43). The side wall of the inner plug (4) is inserted into the bottle mouth (5). The lower sealing side wall (41) is in contact with the outer surface of the guide tube (31), and the upper sealing side wall (42) is in contact with the inner surface of the bottle mouth (5).

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