Pouring port packaging structure of a packaging box and the packaging box

Abstract

Pouring port packaging structure of a packaging box and a packaging box. The pouring port packaging structure includes a pouring port structure (11), a cutting element (12), and a cap (13). The pouring port structure (11) includes a fixing portion (112) and a mouth portion (111) connected to the fixing portion (112). The mouth portion (111) has a cylindrical structure. Inside the mouth portion (111), a first female thread (114) is provided. Each convex tooth structure (1141) of the first female thread (114) is provided with a first inclined surface (1142) and a second inclined surface (1143) located on two side portions of the convex tooth structure (1141). The first inclined surface (1142) faces the fixing portion. A concave structure is formed between any two adjacent convex tooth structures (1141) of the first female thread (114). In the same cross-section passing through the axis of the mouth portion (111), the bottom of the concave structure has a tangent parallel to the mouth portion (111), and the included angle α between the first inclined surface (1142) and the tangent is 110° - 145°, and the included angle β between the second inclined surface (1143) and the tangent is 90° or more. The cutting element (12) is fitted into the mouth portion (111) and is provided with a first male thread (121). The surfaces of the two side portions of each convex tooth structure of the first female thread (114) each have an appropriate inclination angle, thereby reducing the release resistance and alleviating the wear state and undercut state of the thread.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the priority of Chinese Patent Application No. 202210845148.X, entitled "Packaging Box and Spout packaging structure Thereof", filed with the China National Intellectual Property Administration on July 18, 2022, which is incorporated herein by reference in its entirety, and this application also claims the priority of Chinese Patent Application No. 202210843849.X, entitled "Packaging Box and Spout packaging structure Thereof", filed with the China National Intellectual Property Administration on July 18, 2022, which is incorporated herein by reference in its entirety.

[0002] This application relates to the field of packaging, and particularly to a packaging box and its spout packaging structure.

Background Art

[0003] At present, some beverage packaging boxes have a spout portion on the box body, and a cap is connected to the spout portion. To ensure the sealing of the package, a sealing layer is disposed at one end of the spout portion facing the box body, and the sealing layer is sealingly connected to the top side of the box body. To drink the beverage, it is necessary to cut the sealing layer on the top layer of the packaging box from the inside of the spout portion. At present, the spout portion is threadedly connected to the cap, and a cutting element for cutting the sealing layer is disposed inside the spout portion. A male thread is provided on the outer periphery of the cutting element, and a female thread for fittingly connecting with the male thread of the cutting element is provided inside the spout portion. When the cutting element is driven to rotate, the cutting element fits with the female thread of the spout portion and moves downward while rotating. Since the downward rotation requires a certain pressure, a certain depth is set for the screw engagement between the cutting element and the spout portion so that the cutting element can be smoothly moved downward along with the rotation. However, when the spout portion is manufactured by injection molding, it is necessary to push out the injection molded product during demolding. Since the female thread of the spout portion is deep, a greater thrust is required, which makes demolding difficult, the injection molded product is easily deformed, and thus the manufacturing becomes difficult. Therefore, it is necessary to quickly solve the problem that it is difficult to demold the spout portion injection molded product.

Summary of the Invention

[0004] This application discloses a packaging box and its spout packaging structure. In the spout packaging structure of the packaging box, the inclination angle of the surface that hinders demolding is appropriately increased so that the surfaces on both sides of the convex tooth structure of the first female thread of the spout portion have a suitable angle, which leads to the reduction of demolding resistance during manufacturing by injection molding, the smoothing of demolding, and the reduction of wear and undercut of the first female thread.

[0005] To achieve the above object, this application provides the following technical solution, that is, A spout packaging structure of a packaging box, A pouring spout structure including a fixing portion for fixing to a box body of a packaging box and a mouse portion connected to the fixing portion, wherein the mouse portion is located on one side of the fixing portion away from the box body, the mouse portion has a cylindrical structure, a first female thread is provided inside the cylindrical wall of the mouse portion, any one of the convex tooth structures of the first female thread has a first inclined surface and a second inclined surface located on both sides of the convex tooth structure, the first inclined surface faces the fixing portion, a concave structure is formed between any two adjacent convex tooth structures of the first female thread, in the same cross-section passing through the axis of the mouse portion, the bottom of the concave structure has a tangent parallel to the axis of the mouse portion, an included angle α is formed between the first inclined surface and the tangent, with the opening facing the fixing portion, the included angle α is 110° or more and 145° or less, and an included angle β is formed between the second inclined surface and the tangent, with the opening facing away from the fixing portion, the included angle β is 90° or more, the pouring spout structure, A cutting element having a cylindrical structure, the cutting element being configured to be fitted into the mouse portion, a first male thread for fitting and connecting with the first female thread is provided outside the cylindrical wall of the cutting element, and the cutting element is configured to cut a sealing layer on the top side of the box body. A cap configured to fit and connect with the mouse portion and close an opening on the top side of the mouse portion. Provided is a pouring spout packaging structure of a packaging box including the above.

[0006] In the pouring spout packaging structure of the packaging box, the inclination angle of the surface that hinders demolding is appropriately increased so that the surfaces on both sides of the convex tooth structure of the first female thread of the mouse portion have a suitable angle, which leads to a reduction in demolding resistance during manufacturing by injection molding, a smooth demolding, and a reduction in wear, undercuts, etc. of the first female thread.

[0007] Optionally, the included angle α is 120° or more and 135° or less.

[0008] Optionally, the included angle α is 125°.

[0009] Optionally, the included angle β is 100° or more and 120° or less.

[0010] Optionally, the included angle β is 110°.

[0011] Optionally, the curvature of the top of the convex tooth structure is 0.15 mm or more.

[0012] Optionally, the surface roughness Ra of the first female thread is 1.00 μm or less.

[0013] Optionally, the first female thread is located in the thread region on the cylindrical wall of the mouse portion. The thread depth of the first female thread is 55% or more of the wall thickness of the thread region. The thread depth of the first female thread is the dimension from the top of the convex tooth structure in the same radial direction of the mouse portion to the inner surface of the mouse portion.

[0014] Optionally, the thread depth of the first female thread is 60% or more and 130% or less of the wall thickness of the thread region.

[0015] Optionally, the thread depth of the first female thread is 90% or more and 110% or less of the wall thickness of the thread region.

[0016] Optionally, a non-threaded region is further provided in the mouse portion in the extending direction of the axis of the mouse portion. The non-threaded region is located on one side of the thread region away from the fixing portion. The non-threaded region is located at the top of the mouse portion. The wall thickness on the top side of the non-threaded region is 75% or more of the wall thickness of the thread region.

[0017] Optionally, the thread depth of the first female thread is 80% or more and less than the wall thickness on the top side of the non-threaded region of the non-threaded region.

[0018] Optionally, a second male thread is provided on the outside of the cylindrical wall of the mouse portion, and a second female thread for fitting and connecting with the second male thread is provided on the inside of the side wall of the cap.

[0019] Optionally, a drive structure is disposed inside the tubular wall of the cutting element, and a pressing structure extending in the opening direction of the cap is provided on the top wall of the cap. The pressing structure is configured to fit with the drive structure. When the cap is rotated for the first time to open, the pressing structure drives the cutting element to rotate, whereby the cutting element moves toward the fixing portion in the extending direction of the axis of the mouse portion.

[0020] Optionally, at least one cutting tooth is provided on one side of the cutting element facing the fixing portion.

[0021] Optionally, the fixing portion has a flange structure including a cylindrical connection segment connected to the mouse portion and a flange extending outward and connected to one end side of the cylindrical connection segment away from the mouse portion.

[0022] Optionally, a sealing portion for closing the inner hole of the cylindrical connection segment is provided at the end of the cylindrical connection segment away from the mouse portion. The sealing portion has an annular thin region facing the cylindrical wall of the cutting element. The thickness of the thin region of the sealing portion is smaller than the thickness of the central region of the sealing portion, and the cutting element is configured to cut the thin region.

[0023] Optionally, the thickness of the thin region of the sealing portion is less than 50% of the thickness of the central region of the sealing portion.

[0024] Optionally, the thickness of the thin region of the sealing portion is less than 30% of the thickness of the central region of the sealing portion.

[0025] Optionally, the surface roughness Ra of the central region of the sealing portion facing the mouse portion is 1.00 μm or more.

[0026] Optionally, the pouring port structure is manufactured by injection molding.

[0027] This application includes any one of the pouring port packaging structures of the packaging box by the above technical solution and a box body, wherein the pouring port packaging structure is connected to the top side of the box body, and the fixing part of the pouring port packaging structure is connected and fixed to the top side of the box body, and further provides a packaging box.

Brief Description of the Drawings

[0028]

Figure 1

Figure 2

Figure 3

[0029] Reference signs: 1 - pouring port packaging structure; 2 - box body; 11 - pouring port structure; 12 - cutting element; 13 - cap; 111 - mouth part; 112 - fixing part; 113 - sealing part; 114 - first female thread; 115 - second male thread; 121 - first male thread; 122 - cutting teeth; 131 - second female thread; 1121 - flange; 1131 - thin area; 1132 - central area; 1141 - convex tooth structure; 1142 - first inclined surface; 1143 - second inclined surface.

Modes for Carrying Out the Invention

[0030] Regarding the technical solutions in the embodiments of the present application, they will be clearly and fully described with reference to the accompanying drawings of the embodiments of the present application. Obviously, the examples described are only some of the embodiments of the present application, not all. All other embodiments derived by those skilled in the art based on the embodiments of the present application without creative efforts shall be included in the protection scope of the present application.

[0031] As shown in FIGS. 1, 2 and 3, the embodiment of the present application provides a pouring port packaging structure for a packaging box. For ease of explanation, the description is based on the upright position of the packaging box. Further, the upright position of the packaging box means that one side of the box body of the packaging box away from the mouse part is at the bottom, the bottom of the box body faces downward, and the mouse part is in the upward position. In this embodiment, the pouring port packaging structure 1 includes a pouring port structure 11, a cutting element 12 and a cap 13. The packaging box has a box body 2, and an opening for the beverage to pass through is provided on the top side of the box body. The pouring port structure is disposed on the top side of the packaging box and corresponds to the opening. Specifically, the pouring port structure 11 includes a fixing part 112 fixedly connected to the box body 2 of the packaging box and a mouse part 111 connected to the fixing part 112. The fixing part 112 is fixedly connected to the top side of the box body, specifically connected by bonding. The mouse part 111 is located on one side of the fixing part 112 away from the box body. The mouse part 111 has a cylindrical structure, an opening is formed at the top end of the mouse part 111, and the inner hole of the mouse part 111 faces and communicates with the opening on the top side of the box body, so that the beverage in the box body can flow out. The cutting element 12 also has a cylindrical structure. The cutting element 12 is fitted inside the mouse part 111 and is located in the inner hole of the mouse part 111. The cutting element 12 is configured to cut the sealing layer on the top side of the box body facing the mouse part 111. The outer side of the tubular wall of the cutting element 12 is screwed to the inner side of the mouse part 111. Specifically, a first female thread 114 is provided on the inner side of the cylindrical wall of the mouse part 111, a first male thread 121 is provided on the outer side of the cylindrical wall of the cutting element 12, and the first male thread 121 is fitted and connected to the first female thread 114. The cutting element 12 moves downward during rotation, and one end of the cutting element facing the box body is configured to cut the sealing layer on the top side of the box body.Regarding the structure of the first female thread, the first female thread is formed from a continuous convex tooth structure that spirally extends on the inner wall of the mouse portion. Any one of the convex tooth structures 1141 of the first female thread 114 has a first inclined surface 1142 and a second inclined surface 1143 that are located on both sides of the convex tooth structure and are disposed opposite to each other. The first inclined surface 1142 and the second inclined surface 1143 are distributed along the extending direction of the axis A of the mouse portion 111, and the orientations of the first inclined surface 1142 and the second inclined surface 1143 are away from each other. The first inclined surface 1142 faces the fixing portion 112, and the second inclined surface 1143 faces the opening of the mouse portion 111. The concave structure is formed between any two adjacent convex tooth structures 1141 of the first female thread 114. In the same cross-section passing through the axis A of the mouse portion 111, the bottom of the concave structure has a tangent parallel to the axis A of the mouse portion 111, and an included angle α is formed between the first inclined surface and the tangent, with the opening facing the fixing portion. The included angle α is 110° or more and 145° or less. An included angle β is formed between the second inclined surface and the tangent, with the opening facing away from the fixing portion. The included angle β is 90° or more. The spout structure is manufactured by injection molding. When the spout structure 11 is manufactured by injection molding, during demolding, the mold in the mouse portion is removed from the opening at the top end of the mouse portion, and the included angle α is set to 110° - 145° along the demolding direction. Thereby, the inclination angle of the first inclined surface of the convex tooth structure facing the demolding direction becomes larger, that is, the inclination angle of the surface of the convex tooth structure that hinders demolding becomes larger, thereby weakening the interference ability of the wall surface of the convex tooth structure that hinders demolding, reducing friction, and helping to reduce the resistance during demolding. In addition, the included angle β is set to be 90° or more, thereby making it easier for the mold and the mouse portion to separate, promoting the relaxation of undercuts, wear, etc. of the thread, and leading to smooth demolding. The cap 13 covers the top side of the mouse portion, achieves a fitting connection with the mouse portion 111, and is configured to close the opening on the top side of the mouse portion 111, which leads to dust prevention, thereby ensuring that the mouse portion is clean.

[0032] In the pouring port packaging structure of the packaging box, the inclination angle of the surface that hinders demolding is appropriately increased so that the surfaces on both sides of the convex tooth structure of the first female thread in the mouse part have a suitable angle, which leads to a reduction in the demolding resistance during manufacturing by injection molding, a smoother demolding, and a reduction in wear and undercuts of the first female thread.

[0033] In a specific embodiment, the included angle α may be set to be 120° or more and 135° or less, and a more suitable inclination angle of the first inclined surface may be further set, which leads to a reduction in the wear of the thread during demolding. Preferably, the included angle α may be set to 125°, 130°, 132° or other angles, which can smooth the demolding during manufacturing by injection molding, reduce the thrust during demolding, and reduce the wear and undercuts of the thread.

[0034] In addition, specifically, the included angle β may be set to be 100° or more and 120° or less, and a more suitable inclination angle of the second inclined surface may be further set, whereby the thread is more easily separated from the mold during demolding, leading to a reduction in wear and undercuts. Preferably, the included angle β may be set to 110°, 113°, 115° or other angles, which can smooth the demolding during manufacturing and reduce the wear and undercuts of the thread.

[0035] In a possible embodiment, the curvature of the top of the convex tooth structure 1141 may be set to be 0.15 mm or more for easier demolding. The first inclined surface and the second inclined surface of the convex tooth structure are connected at the top, the curvature of the top of the convex tooth structure is set to be 0.15 mm or more, a smooth structure is formed at the top of the convex tooth structure, and the first inclined surface and the second inclined surface smoothly transition at the top so that the top of the convex tooth structure does not become too sharp, which leads to a reduction in wear and resistance during demolding, further smoothing of the demolding, and an improvement in working efficiency. Specifically, the curvature of the top of the convex tooth structure may be set to be 0.16 mm, 0.18 mm, 0.20 mm.

[0036] According to another aspect, in order to make the demolding smoother, in a possible embodiment, the surface roughness Ra of the first female thread 114 is 1.00 μm or less. During manufacturing by casting, the roughness of the product is mainly affected by the roughness of the mold. Therefore, the surface roughness Ra of the first female thread is limited to be 1.00 μm or less, and the surface roughness Ra of the mold in contact with the gate structure is set to be less than 1.00 μm, whereby the surface of the first female thread can reach a certain smoothness, which leads to a reduction in friction and resistance during demolding and a reduction in wear of the first female thread.

[0037] Currently, for some beverage packaging boxes, a cutting element can be driven to rotate, whereby the cutting element moves downward while rotating, and then the sealing layer can be punctured and cut to conveniently form an opening for the beverage to flow out. However, the cutting element and the mouth portion are manufactured with acceptable tolerances. When the cutting element is at the lower limit of the tolerance and the mouth portion is at the upper limit of the tolerance, the screw fit between the mouth portion and the cutting element is insufficient, and force is required for the cutting element to move downward to puncture and cut the sealing layer. Therefore, when the cutting element is driven to rotate, sliding between the cutting element and the mouth portion is easy, and the cutting element rotates at the original position and cannot move downward, whereby the opening cannot be achieved. Therefore, it is urgent to solve the problem that the cutting element cannot open the sealing layer.

[0038] As shown in FIG. 3, based on this spout packaging structure, in a possible embodiment, the cylindrical wall of the mouse portion 111 has a threaded region, and the first female thread 114 is located in the threaded region of the cylindrical wall of the mouse portion. The thread depth z of the first female thread 114 is set to be 55% or more of the wall thickness y of the threaded region. The thread depth z of the first female thread 114 is the dimension from the top side of the convex tooth structure 1141 in the same radial direction of the mouse portion 111 to the inner surface of the mouse portion 111. The inner surface of the mouse portion 111 is the bottom of the groove between two adjacent convex tooth structures, that is, the dimension from the top side of the convex tooth structure 1141 to the bottom of the concave structure. The wall thickness y of the threaded region is the dimension from the inner surface to the outer wall surface of the cylindrical wall of the threaded region in the radial direction of the mouse portion. On the outer side of the cylindrical wall of the cutting element 12, a first male thread 121 that fits and connects with the first female thread 114 is provided. Similarly, since the first male thread 121 of the cutting element 12 fits with the first female thread 114, as long as the first female thread 114 can fit properly with the first male thread 121, the thread depth of the first male thread 121 may be the same as the thread depth of the first female thread, or the thread depth of the first male thread 121 may be slightly larger than the thread depth of the first female thread 114. The cutting element is screwed together with the mouse portion, and the cutting element moves downward during rotation. The first female thread is set such that the thread depth of the first female thread inside the mouse portion is 55% or more of the wall thickness of the threaded region. Thereby, an appropriate ratio is achieved between the thread depth of the first female thread and the wall thickness of the threaded region of the mouse portion, which guarantees a certain wall thickness of the threaded region of the mouse portion, guarantees the structural strength of the cylindrical wall of the mouse portion, guarantees the structural stability of the mouse portion, increases the thread depth of the first female thread, and thereby increases the contact fitting surface between the first female thread of the mouse portion and the first male thread of the cutting element. When the cutting element rotates, the first male thread of the cutting element can stably contact the first female thread, receive a downward pressure and rotate downward. When the lower end of the cutting element cuts the sealing layer of the box body, the cutting element can also rotate stably to avoid sliding so as to successfully cut the opening.

[0039] In a specific embodiment, regarding the ratio between the thread depth z of the first female thread 114 and the wall thickness y of the thread crest region of the mouse portion 111, the thread depth z of the first female thread 114 may be set to be 60% or more and 130% or less of the wall thickness y of the thread crest region. By selecting the ratio between the thread depth of the first female thread 114 and the wall thickness of the thread crest region within a suitable range, the fitting region between the first female thread of the mouse portion and the first male thread of the cutting element can be further increased, which further leads to the cutting element rotating smoothly downward, avoiding sliding when cutting the sealing layer of the box body, and ensuring that the cutting element can successfully cut an opening in the sealing layer of the box body.

[0040] More preferably, further, the thread depth z of the first female thread 114 may be set to be 90% or more and 110% or less of the wall thickness y of the thread crest region. Therefore, the ratio between the thread depth of the first female thread and the wall thickness of the thread crest region of the mouse portion becomes more appropriate, thereby making the fitting region between the first female thread of the mouse portion and the first male thread of the cutting element more appropriate, maintaining an effective thread engagement for preventing sliding between the first female thread of the mouse portion and the first male thread of the cutting element, and ensuring that the cutting element can cut an opening in the sealing layer of the box body. In a specific embodiment, the thread depth z of the first female thread 114 may be 92%, 95%, 98%, or 105% of the wall thickness y of the thread crest region, thereby maintaining an effective thread engagement for avoiding sliding between the first female thread of the mouse portion and the first male thread of the cutting element.

[0041] In a possible embodiment, the thread depth z of the first female thread may be set to 0.5 mm to 0.55 mm. Specifically, the thread depth z of the first female thread may be set to 0.52 mm, 0.53 mm, or 0.54 mm, thereby maintaining an effective engagement for avoiding sliding between the first female thread and the first male thread.

[0042] Referring to FIG. 3, in a possible embodiment, the mouse portion 111 further has a non-threaded region provided in the extending direction of the axis A of the mouse portion 111. The non-threaded region is located on one side of the threaded region away from the fixing portion 112. The non-threaded region is located at the top of the mouse portion 111, and the wall thickness x on the top side of the non-threaded region is 75% or more of the wall thickness of the threaded region. The non-threaded region of the mouse portion is on the top side of the mouse portion. The end face of the non-threaded region away from the threaded region is the top face of the mouse portion. In this embodiment, the spout structure is manufactured by injection molding. The end face on the top side of the mouse portion is the thrust acting face during demolding. The width of the end face on the top side of the mouse portion is set to be 75% or more of the wall thickness of the threaded region. Thereby, the end face on the top side of the mouse portion has a specific width, which can be called the discharge width during demolding. This is convenient for applying force during demolding, leading to smoother demolding and being conducive to the manufacture of the spout structure by injection molding.

[0043] Preferably, in order to set the discharge width better, the relationship between the thread depth of the first female thread and the wall thickness of the non-threaded region is set such that the thread depth of the first female thread 114 is 80% or more and less than the wall thickness x on the top side of the non-threaded region. Therefore, the top side of the mouse portion has a more appropriate discharge width, which is conducive to demolding when the spout structure is manufactured by injection molding, leading to improved manufacturing efficiency.

[0044] In a possible embodiment, as shown in FIG. 1, the mouse portion 111 is threadedly connected to the cap 13. Specifically, a second male thread 115 is provided on the outer side of the cylindrical wall of the mouse portion 111, and a second female thread 131 for fitting and connecting with the second male thread 115 is provided on the inner side of the side wall of the cap 13. In this way, the connection between the cap and the mouse portion becomes stronger and tighter.

[0045] Based on this pouring spout packaging structure, in a possible embodiment, as shown in FIGS. 1 and 2, a driving structure is disposed inside the tubular wall of the cutting element 12, and on the top wall of the cap 13, a pressing structure extending in the opening direction of the cap is provided. The pressing structure is configured to fit with the driving structure. When the cap 13 is rotated for the first time to open, the pressing structure comes into contact and fits with the driving structure, and the pressing structure can apply a rotational force to the driving structure. Thereby, the pressing structure drives the cutting element 12 to rotate. Therefore, the cutting element 12 can move toward the fixing portion 112 in the extending direction of the axis of the mouse portion 111 during rotation. When the cap is opened for the first time, the pressing structure inside the cap fits with the driving structure of the cutting element, and the rotation of the cap drives the cutting element to rotate. The cutting element is threadedly fitted inside the cap, and the spiral direction is downward. Exactly, the cutting element moves downward during rotation. When the cap is rotated and fully opened, the cutting element is driven to rotate and move downward, and the lower end of the cutting element can cut an opening in the sealing layer on the top side of the box body. The operation process is simple and highly reliable. When the cap is opened, an opening is cut in the sealing layer, which is very convenient for the user to drink. This is very convenient.

[0046] Specifically, as shown in FIG. 2, at least one cutting tooth 122 is provided on one side of the cutting element 12 facing the fixing portion 112. The cutting tooth 122 has a cutting tip, and the cutting tip faces the box body so as to cut the cutting film. Preferably, two cutting teeth, three cutting teeth, or four cutting teeth may be provided at the lower end of the cutting element. Alternatively, a plurality of cutting teeth arranged circumferentially around the axis of the cutting element may be provided so as to cut the sealing layer more quickly.

[0047] Referring to FIG. 1, in a possible embodiment, the fixing portion 112 has a flange structure including a cylindrical connection segment connected to the mouse portion 111, and a flange 1121 extending outwardly and connected to one end of the cylindrical connection segment on the side away from the mouse portion 111. The flange may be fixedly connected to the box body. Specifically, the flange may be fixed to the top side of the box body by bonding. The fixing portion and the mouse portion form an integral structure and can be manufactured in the same injection molding process, resulting in better structural stability and better structural strength.

[0048] Furthermore, referring further to FIG. 1, a sealing portion 113 for closing the inner hole of the cylindrical connection segment is provided at the end of the cylindrical connection segment away from the mouse portion 111. After the flange is fixed to the top side of the box body, the sealing performance is also very good. The surface where the flange is located is integrally formed with the connection surface on the top side. The sealing portion is disposed at a position on the same plane as the flange and opposite to the inner hole of the cylindrical connection segment, corresponding to the sealing on the top side of the box body. The sealing portion may be reused as a part of the sealing layer on the top side of the box body. The sealing portion 113 has an annular thin region 1131 facing the cylindrical wall of the cutting element 12, and the thickness of the thin region 1131 of the sealing portion 113 is smaller than the thickness of the central region 1132 of the sealing portion 113. The cutting element is configured to cut the thin region 1131. The thickness of the thin region is small, so the cutting force is reduced, which is conducive to the smooth cutting of the cutting element. This avoids the sliding of the screw fit between the cutting element and the mouse portion and ensures that the cutting element can successfully cut an opening in the sealing portion.

[0049] Specifically, regarding the setting of the thin portion of the sealing portion, the thickness of the thin region 1131 of the sealing portion 113 can be selected to be less than 50% of the thickness of the central region 1132 of the sealing portion 113. By doing so, the thickness of the thin region of the sealing portion will not be so thin that the sealing effect is lost, and the thin region can be easily cut and opened. More preferably, based on ensuring the sealing performance of the sealing portion, the thickness of the thin region 1131 of the sealing portion 113 may be set to be less than 30% of the thickness of the central region 1132 of the sealing portion 113. Thereby, the thin region is easier to cut, whereby the cutting resistance of the cutting element is reduced and the success rate of opening is guaranteed.

[0050] Specifically, regarding the setting of the surface roughness of the sealing portion 113, the surface roughness Ra of the surface of the central region 1132 of the sealing portion 113 facing the mouse portion 111 may be set to be 1.00 μm or more. That is, during manufacturing by injection molding, the surface roughness Ra of a part of the mold corresponding to the surface of the central region 1132 of the sealing portion 113 facing the mouse portion 111 is 1.00 μm or more.

[0051] Specifically, the sealing structure has an integral structure formed by injection molding and has good stability and reliability of the entire structure.

[0052] In addition, as shown in FIG. 2, this embodiment further provides a packaging box including any one of the pouring port packaging structures 1 of the packaging box according to the above example and a box body 2, wherein the pouring port packaging structure 1 is connected to the top side of the box body 2, and the fixing portion 112 of the pouring port packaging structure 1 is connected and fixed to the top side of the box body 2.

[0053] It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present application without departing from the spirit and scope of the present application. Therefore, if these modifications and variations of the present application are within the scope of the claims of the present application and their equivalent technologies, the present application is intended to include these modifications and variations as well.

Claims

1. A pouring spout packaging structure for a packaging box, comprising: a fixing portion (112) for fixing to a box body (2) of the packaging box, and a spout portion (111) connected to the fixing portion (112), wherein the spout portion (111) is located on one side of the fixing portion (112) away from the box body (2), the spout portion (111) has a cylindrical structure, a first female thread (114) is provided inside the cylindrical wall of the spout portion (111), any one of the convex tooth structures (1141) of the first female thread (114) has a first inclined surface (1142) and a second inclined surface (1143) located on both sides of the convex tooth structure, the first inclined surface (1142) faces the fixing portion (112), a concave structure is formed between any two adjacent convex tooth structures (1141) of the first female thread (114), in the same cross-section passing through the axis of the spout portion (111), the bottom of the concave structure has a tangent parallel to the axis of the spout portion (111), an included angle α is formed between the first inclined surface (1142) and the tangent, with the opening facing the fixing portion (112), the included angle α is 110° or more and 145° or less, and an included angle β is formed between the second inclined surface (1143) and the tangent, with the opening facing away from the fixing portion (112), the included angle β is 90° or more, the pouring spout structure (11); a cutting element (12) having a cylindrical structure, wherein the cutting element (12) is configured to be fitted into the spout portion (111), a first male thread (121) for fitting and connecting with the first female thread (114) is provided outside the cylindrical wall of the cutting element (12), and the cutting element (12) is configured to cut a sealing layer on the top side of the box body; a cap (13) configured to be fitted and connected with the spout portion (111) and close an opening on the top side of the spout portion (111); A pouring spout packaging structure for a packaging box, characterized by comprising the above.

2. The pouring spout packaging structure for a packaging box according to Claim 1, wherein the included angle α is 120° or more and 135° or less.

3. The pouring port packaging structure of the packaging box according to claim 2, wherein the included angle α is 125°.

4. The pouring port packaging structure of the packaging box according to claim 1, wherein the included angle β is 100° or more and 120° or less.

5. The pouring port packaging structure of the packaging box according to claim 4, wherein the included angle β is 110°.

6. The pouring port packaging structure of the packaging box according to claim 1, wherein the curvature of the top of the convex tooth structure (1141) is 0.15 mm or more.

7. The pouring port packaging structure of the packaging box according to claim 1, wherein the surface roughness Ra of the first female thread (114) is 1.00 μm or less.

8. The first female thread (114) is located in the thread region on the cylindrical wall of the mouse portion (11), and the thread depth of the first female thread (114) is 55% or more of the wall thickness of the thread region. The thread depth of the first female thread (114) is the dimension from the top side of the convex tooth structure (1141) in the same radial direction of the mouse portion (111) to the inner surface of the mouse portion (111). The pouring port packaging structure of the packaging box according to claim 1.

9. The pouring port packaging structure of the packaging box according to claim 8, wherein the thread depth of the first female thread (114) is 60% or more and 130% or less of the wall thickness of the thread region.

10. The pouring port packaging structure of the packaging box according to claim 9, wherein the thread depth of the first female thread (114) is 90% or more and 110% or less of the wall thickness of the thread region.

11. In the mouse portion (111), a non-threaded region is further provided in the extending direction of the axis of the mouse portion (111). The non-threaded region is located on one side of the thread region away from the fixing portion (112). The non-threaded region is located at the top of the mouse portion (111), and the wall thickness on the top side of the non-threaded region is 75% or more of the wall thickness of the thread region. The pouring port packaging structure of the packaging box according to claim 8.

12. The packaging structure of the pouring port of the packaging box according to claim 11, wherein the thread depth of the first female thread (114) is 80% or more of the wall thickness on the top side of the non-threaded crest region and less than the wall thickness on the top side of the non-threaded crest region.

13. A second male thread (115) is provided on the outer side of the cylindrical wall of the mouse portion (111), and a second female thread (131) for fitting and connecting with the second male thread (115) is provided on the inner side of the side wall of the cap (13). The packaging structure of the pouring port of the packaging box according to any one of claims 1 to 9.

14. A driving structure is disposed inside the tubular wall of the cutting element (12), and a pressing structure extending in the opening direction of the cap is provided on the top wall of the cap (13). The pressing structure is configured to fit with the driving structure. When the cap (13) is rotated for the first time to open, the pressing structure drives the cutting element (12) to rotate, whereby the cutting element (12) moves toward the fixing portion (112) in the extending direction of the axis of the mouse portion (111). The packaging structure of the pouring port of the packaging box according to claim 13.

15. At least one cutting tooth (122) is provided on one side of the cutting element (12) facing the fixing portion (112). The packaging structure of the pouring port of the packaging box according to any one of claims 1 to 9.

16. The fixing portion (112) has a flange structure including a cylindrical connection segment connected to the mouse portion (111) and a flange (1121) extending outward and connected to one end side of the cylindrical connection segment away from the mouse portion (111). The packaging structure of the pouring port of the packaging box according to any one of claims 1 to 9.

17. At the end of the cylindrical connection segment away from the mouse portion (111), a sealing portion (113) for closing the inner hole of the cylindrical connection segment is provided. The sealing portion (113) has an annular thin region (1131) facing the cylindrical wall of the cutting element (12). The thickness of the thin region (1131) of the sealing portion (113) is smaller than the thickness of the central region (1132) of the sealing portion (113). The cutting element (12) is configured to cut the thin region (1131). The pouring spout packaging structure of the packaging box according to claim 16.

18. The pouring spout packaging structure of the packaging box according to claim 17, wherein the thickness of the thin region (1131) of the sealing portion (113) is less than 50% of the thickness of the central region (1132) of the sealing portion (113).

19. The pouring spout packaging structure of the packaging box according to claim 18, wherein the thickness of the thin region (1131) of the sealing portion (113) is less than 30% of the thickness of the central region (1132) of the sealing portion (113).

20. The pouring spout packaging structure of the packaging box according to claim 17, wherein the surface roughness Ra of the central region (1132) of the sealing portion (113) facing the mouse portion (111) is 1.00 μm or more.

21. The pouring spout packaging structure of the packaging box according to any one of claims 1 to 12, wherein the pouring spout structure (11) is manufactured by injection molding.

22. A packaging box, comprising the pouring spout packaging structure (1) of the packaging box according to any one of claims 1 to 21 and a box body (2). The pouring spout packaging structure (1) is connected to the top side of the box body (2), and the fixing portion (112) of the pouring spout packaging structure (1) is connected and fixed to the top side of the box body (2).

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