Cover body of liquid packaging box and liquid packaging box

Abstract

The invention discloses a cover body of a liquid packaging box and the liquid packaging box. The cover body of the liquid packaging box comprises a cover cap, an internally-cutting piece and a cover base. The cover base is fixed to the liquid packaging box, the cover cap is located on the outer side of the cover base, the internally-cutting piece is located in the cover base, and the cover cap, the internally-cutting piece and the cover base are provided with force transmission devices, so that the cover cap firstly drives the internally-cutting piece to axially move from a first position to a second position in the cover base and pierce a sealing layer of the liquid packaging box during first-time opening; then, the inner cutting piece is driven by the cover cap to rotate around the axial direction to cut a sealing layer of the liquid packaging box, and an opening is formed; and at least one drop is generated when the contents in the liquid packaging box flow out of the cover body. According to the cover body of the liquid packaging box and the liquid packaging box, contents can flow out slowly, the dumping distance of the contents is shortened, and the situation of choke throat is prevented; in addition, the drinking experience feeling can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of container covers, and in particular relates to a cover of a liquid packaging box and a liquid packaging box. Background Art

[0002] In order to facilitate the transportation and storage of liquid food and beverages (such as milk, juice and water), they are usually packaged in packaging boxes of various specifications, and a pouring port is provided on the top or side of the packaging box so that the liquid in the box can be poured out through the pouring port.

[0003] When pouring liquid through the pouring spout, if a small-diameter pouring spout is used, it is not easy for the outside air to enter the packaging box through the pouring spout, making the air pressure inside the packaging box lower than the outside air pressure, causing the liquid to surge at the lid, resulting in poor outflow and easy splashing, affecting the user experience. In addition, the small-diameter pouring spout does not match the size of the oral cavity, which will cause consumers to feel uncomfortable when drinking with their lips. Therefore, a larger-diameter pouring spout is usually set on the packaging box to facilitate pouring liquids.

[0004] However, when pouring liquid through a large-diameter pouring spout, the liquid flows faster at the pouring spout, which can easily cause the liquid to splash and overflow, resulting in a longer pouring distance (the distance between the farthest end of the liquid poured from the pouring spout and the upper edge of the pouring spout). When drinking, the liquid will flow directly to the throat, causing "throat choking". Summary of the invention

[0005] In view of the above problems, the present invention discloses a cover body of a liquid packaging box and a liquid packaging box to overcome the above problems or at least partially solve the above problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In one aspect, the present invention provides a cover body of a liquid packaging box, comprising a cover cap, an inner cut piece and a cover seat;

[0008] The cover seat is fixed on the liquid packaging box, the cover cap is located on the outside of the cover seat, and the inner cutting piece is located inside the cover seat. The cover cap, the inner cutting piece and the cover seat have a force transmission device, so that when the cover is opened for the first time, the cover cap first drives the inner cutting piece to move axially from a first position to a second position inside the cover seat and pierce the sealing layer of the liquid packaging box. Thereafter, the inner cutting piece rotates around the axial direction under the drive of the cover cap to cut the sealing layer of the liquid packaging box to form an opening;

[0009] When the contents in the liquid packaging box flow out from the cover body, at least one drop is generated.

[0010] Furthermore, the internal cutting piece includes a connecting section and a puncture section from top to bottom, the lower end of the puncture section is provided with cutting teeth, the inner diameter of the connecting section is larger than the inner diameter of the puncture section, and a drop is generated when the contents flow from the puncture section on the internal cutting piece to the connecting section.

[0011] Furthermore, the connecting section and the puncture section are connected via an inclined section.

[0012] Furthermore, an obtuse angle formed between the inner side wall of the inclined section and the inner side wall of the connecting section is 135° to 160°.

[0013] Furthermore, the inner circumferential upper edge of the cover seat is lower than the outer circumferential upper edge of the cover seat, and when the contents flow out of the cover body, a drop is generated between the inner circumferential upper edge of the cover seat and the outer circumferential upper edge of the cover seat.

[0014] Furthermore, the area between the inner circumferential upper edge of the cover seat and the outer circumferential upper edge of the cover seat is the end of the cover seat, and the end of the cover seat is a slope or chamfer arranged along the circumference.

[0015] Furthermore, the cover seat is provided with a guide groove, and the guide groove is at least partially arranged at the end of the cover seat.

[0016] Furthermore, the bottom of the guide groove is inclined toward the outer circumferential upper edge of the cover seat.

[0017] Furthermore, the groove bottom of the guide groove includes a first inclined surface, an upper convex arc surface and a second inclined surface;

[0018] The first inclined surface is connected to the inner circumferential surface of the cover seat, the second inclined surface is connected to the upper edge of the outer circumference of the cover seat, and the upper convex arc surface is connected between the first inclined surface and the second inclined surface;

[0019] The angle formed between the first inclined plane and the vertical line is 7° to 20°, and the angle formed between the second inclined plane and the horizontal line is 60° to 80°; wherein the vertical line is the axis center line of the cover seat.

[0020] Furthermore, one end of the guide groove extends to the inner circumferential surface of the cover seat, and the other end of the guide groove extends to the upper edge of the outer circumference of the cover seat or the end of the cover seat.

[0021] Furthermore, the width of the guide groove decreases along the liquid outflow direction.

[0022] Furthermore, the guide groove is a fan-shaped groove, the arc end of the fan-shaped groove is located on the inner circumferential surface of the cover seat, and the center end of the fan-shaped groove is located on the outer circumferential upper edge of the cover seat or the end of the cover seat.

[0023] Furthermore, the width of the guide groove increases along the liquid outflow direction.

[0024] Furthermore, the guide groove is a double-fan-shaped groove, a diamond-cut groove or a spout-shaped groove.

[0025] Another aspect of the present invention provides a liquid packaging box, on which the liquid packaging box is provided with the cover body of the liquid packaging box described above.

[0026] The advantages and beneficial effects of the present invention are:

[0027] The present invention, through the structural arrangement of the inscribed piece and / or the cover seat in the cover body, generates at least one drop when the contents flow out of the cover body, which can release the potential energy of the contents, reduce its flow speed, and allow the contents to flow out gently, thereby shortening the pouring distance of the contents, so that the contents flow mostly to the tip of the tongue, solving the problem of "choking the throat" that children and the elderly easily experience when drinking; and, because the contents poured out of the cover body are more likely to fall on the tip of the tongue, the contact area between the contents and the tongue and the oral cavity is larger and the contact time is longer, thereby enhancing the taste experience when drinking and providing a better drinking experience.

[0028] By setting the diameter variation between the connection section and the puncture section of the inner cutting piece in the cover body, the liquid packaging box can be cut to form a smaller opening on the liquid packaging box while using a large-diameter pouring port cover body, thereby avoiding the negative impact of the larger opening on the oxygen permeability and integrity performance of the liquid packaging box, significantly improving the packaging performance of the liquid packaging box, reducing the amount of plastic coating, and being more environmentally friendly.

[0029] By arranging a guide groove on the cover seat, the contents can be concentrated and guided when flowing out of the cover seat, preventing the contents from overflowing from both sides of the lip contact area due to the large pouring mouth when drinking; especially for the small amount of remaining contents, it can flow out more easily through the guide groove, preventing the waste of contents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0031] Figure 1 An exploded structural diagram of a cover of a liquid packaging box in one embodiment of the present invention;

[0032] Figure 2 An axial cross-sectional view of a cover of a liquid packaging box in one embodiment of the present invention;

[0033] Figure 3 A three-dimensional structural diagram of a cap in one embodiment of the present invention;

[0034] Figure 4 A structural diagram of an inscribed member in one embodiment of the present invention;

[0035] Figure 5 is an axial section view of an inscribed member in one embodiment of the present invention;

[0036] Figure 6 A three-dimensional structural diagram of a cover seat in one embodiment of the present invention;

[0037] Figure 7 An axial cross-sectional view of a cover seat in one embodiment of the present invention;

[0038] Figure 8 is a position relationship diagram of the inner cutting piece and the cover seat when the cover body is not in use in one embodiment of the present invention;

[0039] Fig. 9 A diagram showing the position relationship between the inner cutting piece and the cover seat after the cover body is used in one embodiment of the present invention;

[0040] Fig.10 It is a schematic diagram of the working state of the cover of the existing liquid packaging box when pouring out the contents;

[0041] Fig.11 It is a schematic diagram of the working state of the cover of the liquid packaging box of the present invention when pouring out the contents;

[0042] Fig.12 It is a cross-sectional view of the guide groove along the axial direction of the cover seat in one embodiment of the present invention;

[0043] Figures 13 to 15 It is a schematic diagram of the structure of the guide groove in other embodiments of the present invention.

[0044] In the figure: 1. cover cap; 2. cover seat; 2-1. outer circumferential upper edge of cover seat; 2-2. end of cover seat; 2-3. inner circumferential upper edge of cover seat; 2-4. inner circumferential surface of cover seat; 3. guide groove; 3-1. first inclined surface; 3-2. upper convex arc surface; 3-3. second inclined surface; 4. internal cutting piece; 4-1. connecting section; 4-2. inclined section; 4-3. puncture section; 5. external thread; 6. internal thread; 7. cutting tooth; 8. triangular blade; 9. first fixed thread; 10. second fixed thread; 11. annular boss; 12. sealing layer. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments 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 creative work are within the scope of protection of the present invention.

[0046] The technical solutions provided by various embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0047] In one embodiment of the present invention, a cover of a liquid packaging box is disclosed, such as Figures 1 to 9 As shown, the cover body includes a cap 1, an inner cutting piece 4 and a cover seat 2. The lower end of the cover seat 2 is fixed on the liquid packaging box. The cover seat 2 has a channel inside, which can be connected to the inside of the liquid packaging box after opening. The content (such as milk) in the liquid packaging box can be poured out through the cover seat 2; the cap 1 is located on the outside of the cover seat 2, and the outer circumferential surface of the cover seat 2 is provided with a first fixing thread 9, and the inner circumferential surface of the cap 1 is provided with a second fixing thread 10 that matches the first fixing thread 9. The first fixing thread 9 and the second fixing thread 10 realize the matching connection between the cap 1 and the cover seat 2. Of course, in other embodiments, other connection methods such as interference connection or clamping can also be used between the cap and the cover seat.

[0048] The inner cutting piece 4 is located in the cover seat 2 and can move axially downward relative to the cover seat 2. An external thread 5 is provided on the outer circumferential surface of the inner cutting piece 4, and an internal thread 6 matching with the external thread 5 is provided on the inner circumferential surface of the cover seat 2. The inner cutting piece 4 and the cover seat 2 cooperate with each other through the internal thread 6 and the external thread 5, so that the inner cutting piece 4 can be screwed into the cover seat 2; and the lower end of the inner cutting piece 4 is provided with a cutting tooth 7, and the cutting tooth 7 is used to pierce and cut the sealing layer 12 on the liquid packaging box; the cap 1, the inner cutting piece 4 and the cover seat 2 have a force transmission device, when the cover body is not in use, such as Figure 8 As shown, the inscribed member 4 is completely located in the cover seat 2 and is located above the sealing layer 12 (ie, the first position); Figure 3 As shown, a triangular blade 8 is axially provided inside the cap 1, and a guide structure is provided on the outer circumference of the inscribed member 4, and a guide structure is also provided on the inner circumference of the cover seat 2. When the cap 1 is used for the first time, the triangular blade 8 applies downward pressure to the inscribed member 4. Due to the interaction between the guide structures on the inscribed member 4 and the guide structures on the cover seat 2, the inscribed member 4 can only move downward axially relative to the cover seat 2 at the beginning. At this time, as shown in FIG. Fig. 9As shown, the cutting tooth 7 passes through the sealing layer 12 (i.e., the second position), and then the cap 1 continues to be rotated. Since the guiding structure on the inner cutting piece 4 is separated from the guiding structure on the cover seat 2, the inner cutting piece 4 rotates around the axis under the drive of the cap 1, cutting the sealing layer 12 of the liquid packaging box to form an opening, so that the contents in the liquid packaging box can pass through the inner cutting piece 4 and the cover seat 2 and flow out.

[0049] Furthermore, if Figure 5 As shown, the internal cutting piece 4 includes a connecting section 4-1, an inclined section 4-2 and a puncture section 4-3 from top to bottom, and the inner diameter of the connecting section 4-1 is larger than the inner diameter of the puncture section 4-3.

[0050] Specifically, the external thread 5 is arranged on the outer circumferential surface of the connecting section 4-1, and the cutting teeth 7 are arranged at the lower end of the puncture section 4-3; Fig.11 As shown, since the inner diameter of the connecting section 4-1 is larger than the inner diameter of the puncture section 4-3, a first drop is formed between the inner circumferential surface of the puncture section 4-3 and the inner circumferential surface of the connecting section 4-1. When the contents in the liquid packaging box are poured out through the cover body, the contents will pass through the puncture section 4-3, the inclined section 4-2 and the connecting section 4-1 in sequence. Since the drop lengthens the outflow path of the contents, the flow rate of the contents is reduced, so that the contents can flow out slowly, and splashing caused by excessive outflow of the contents is prevented. In addition, the inner diameter of the connecting section 4-1 is larger than the inner diameter of the puncture section 4-3, which can also enable the liquid packaging box to only cut a smaller opening on the liquid packaging box while using a cover body with a larger caliber pouring port. In the previous liquid packaging box cover, the inner diameter of the connecting section of the internal cutting piece is the same as that of the puncture section. In order to maintain the matching connection between the connecting section and the cover seat, if a cover with a larger diameter is used, the internal cutting piece will cut a larger opening on the liquid packaging box, and the larger opening will have a negative impact on the oxygen permeability and integrity of the liquid packaging box, resulting in the packaging material requiring a thicker plastic coating to ensure the packaging performance of the liquid packaging box, which causes excessive use and waste of materials, and too much plastic is also very unfavorable for environmental protection. However, the present invention adopts a variable diameter structure between the connecting section and the puncture section of the internal cutting piece, so that the opening formed on the packaging box is smaller without reducing the diameter of the cover, which can significantly improve the packaging performance of the liquid packaging box.

[0051] In addition, if Figure 6 and Figure 7 As shown, the inner circumferential upper edge 2-3 of the cover seat is lower than the outer circumferential upper edge 2-1 of the cover seat. When the contents flow out of the cover body, a drop is generated between the inner circumferential upper edge 2-3 of the cover seat and the outer circumferential upper edge 2-1 of the cover seat, which can further reduce the flow rate of the contents and enable the contents to flow out smoothly.

[0052] Moreover, the end 2-2 of the cover seat is located between the inner circumferential upper edge 2-3 of the cover seat and the outer circumferential upper edge 2-1 of the cover seat. The end 2-2 of the cover seat is a circumferentially arranged inclined surface, which can not only drain the contents in the cover seat, making it easier to pour out the contents, but also make the cover seat more comfortable when in contact with the tongue and the oral cavity. Of course, in other embodiments, the end of the cover seat can also be a chamfered surface arranged along the circumference.

[0053] When the contents flow out from the cover of this embodiment, Fig.11 As shown, at least one drop can be generated, thereby reducing the flow rate of the contents, thereby shortening the pouring distance of the contents (i.e., the distance between the farthest end of the contents poured out from the cover body and the upper edge of the cover seat), and the pouring distance is d.

[0054] In the cover of the existing liquid packaging box, Fig.10 As shown, the speed of the contents flowing in the flow channel of the cover body cannot be effectively reduced, resulting in a large pouring distance of the contents (i.e., the distance between the farthest end of the contents poured out of the cover body and the upper edge of the cover seat), and the pouring distance is D.

[0055] By comparison, it can be seen that the pouring distance d is smaller than the pouring distance D. Therefore, the contents poured out from the cover body in this embodiment are not prone to splashing or overflowing. When drinking the contents through the cover body, the contents flow mostly to the tip of the tongue, solving the problem of "choking" that children and the elderly are prone to when drinking.

[0056] In addition, since the taste buds that sense sweetness are mostly concentrated on the tip of the tongue, and there are a large number of tactile and temperature sensing cells on the tongue and mouth, the contents poured out through the cover of this embodiment are more likely to fall on the tip of the tongue, making the contact area between the contents and the tongue and mouth larger and the contact time longer, thereby enhancing the taste experience when drinking and providing a better drinking experience; while the contents poured out through the cover of the existing liquid packaging box are prone to splashing and overflowing due to the fast outflow speed, causing the contents to flow mostly to the throat, which is prone to "choking the throat" problem; and the contents poured out from the cover have a smaller contact area with the tongue and mouth and a shorter contact time, resulting in a poor drinking experience.

[0057] In summary, in the cover body of the present embodiment, the internal cutting piece is arranged into a connecting section, an inclined section and a puncture section which are connected in sequence, and the inner diameter of the connecting section is made larger than the inner diameter of the puncture section, so that a height difference is formed between the inner circumferential surface of the puncture section and the inner circumferential surface of the connecting section. The flow rate of the contents is reduced, so that the contents can flow out slowly, thereby shortening the pouring distance of the contents, so that the contents flow mostly to the tip of the tongue, solving the problem of "choking the throat" that children and the elderly are prone to when drinking; and, because the contents poured out of the cover body are more likely to fall on the tip of the tongue, the contact area of ​​the contents with the tongue and the mouth is larger and the contact time is longer, thereby enhancing the taste experience when drinking and providing a better drinking experience.

[0058] In this embodiment, if Figure 2 , Figure 5 , Figure 8 and Fig. 9 As shown, the connecting section 4-1 and the puncture section 4-3 are connected by the inclined section 4-2, the inner diameter of the connecting section 4-1 is larger than the inner diameter of the puncture section 4-3, and an annular boss 11 is provided on the inner side of the lower edge of the cover seat 2 along the circumferential direction, the inner diameter of the annular boss 11 is larger than the outer diameter of the puncture section 4-3, and smaller than the outer diameter of the connecting section 4-1, and the annular boss 11 is used to limit the internal cutting piece 4; when the internal cutting piece 4 moves downward axially relative to the cover seat 2 so that the cutting tooth 7 passes through the sealing layer 12, the annular boss 11 just catches the inclined section 4-2 to prevent the internal cutting piece 4 from falling into the liquid packaging box.

[0059] In addition, a buffer portion is provided on the inner circumferential surface of the cover seat along the circumferential direction. In this embodiment, the buffer portion is a protrusion provided on the inner circumferential surface of the cover seat along the circumferential direction, and the protrusion is located above the inscribed member; thus, when the contents flow through the inscribed member and contact the inner circumferential surface of the cover seat, the protrusion on the inner circumferential surface of the cover seat will generate resistance to the flow of the contents, reduce the flow rate of the contents, and further prevent the contents from splashing and overflowing when pouring.

[0060] Furthermore, the obtuse angle formed between the inner side wall of the inclined section and the inner side wall of the connecting section is 135° to 160°; this structural setting saves the material of the internal cutting parts while being able to reduce the flow rate of the contents, thereby reducing production costs.

[0061] In this embodiment, if Figure 1 and Figure 6 As shown, the cover seat 2 is provided with a guide groove 3, which is at least partially arranged at the end 2-2 of the cover seat, and the width of the guide groove 3 decreases along the liquid outflow direction. By providing the guide groove, the contents can be concentrated and guided when flowing out of the cover seat, preventing the contents from overflowing from both sides of the lip contact part due to the large pouring mouth when drinking; in addition, the remaining small amount of contents can be more easily flowed out through the guide groove to prevent the waste of the contents.

[0062] There are multiple guide grooves, which are evenly arranged on the cover seat along the circumferential direction; when the contents of the liquid packaging box are poured from different directions, they can be guided through the guide grooves.

[0063] In addition, the bottom of the guide groove 3 is inclined toward the outer circumferential upper edge 2-1 of the cover seat, one end of the guide groove 3 extends to the inner circumferential surface 2-4 of the cover seat, and the other end of the guide groove 3 extends to the outer circumferential upper edge 2-1 of the cover seat, which can realize the diversion of contents when flowing out of the cover seat 2, making it easier for the contents to flow out; or in other embodiments, the other end of the guide groove can also extend to the end of the cover seat.

[0064] Furthermore, if Figure 6 As shown, the guide groove 3 is a fan-shaped groove, the arc end of the fan-shaped groove is located on the inner circumferential surface 2-4 of the cover seat, and the center end of the fan-shaped groove is located on the outer circumferential upper edge 2-1 of the cover seat; or, the center end of the fan-shaped groove can also be located at the end of the cover seat. In this way, the contents at the inner circumferential surface 2-4 of the cover seat are more easily accumulated in the fan-shaped groove through the arc end of the fan-shaped groove, and then flow out through the center end of the fan-shaped groove. Preferably, the arc length of the fan-shaped groove is 3mm to 15mm.

[0065] In other embodiments, Figures 13 to 15 As shown, the width of the guide groove 3 increases along the direction of liquid outflow. This arrangement can further reduce the flow rate of the contents flowing out of the cover seat when a large amount of contents flows out of the container, thereby avoiding the impact force on the drinker when the contents flow at a fast rate and avoiding splashing of the contents. The guide groove can also be a double-fan groove, a diamond-cut groove or a spout groove, which is also within the protection scope of the present invention.

[0066] In addition, if Fig.12 As shown, the bottom of the guide groove 3 includes a first inclined surface 3-1, an upper convex arc surface 3-2 and a second inclined surface 3-3.

[0067] Specifically, the first inclined surface 3-1 is connected to the inner circumference of the cover seat 2, the second inclined surface 3-3 is connected to the upper edge of the outer circumference of the cover seat 2, and the upper convex arc surface 3-2 is connected between the first inclined surface 3-1 and the second inclined surface 3-2. Further, the angle α formed between the first inclined surface 3-1 and the vertical line is 7° to 20°, and the angle β formed between the second inclined surface 3-3 and the horizontal line is 60° to 80°; wherein the vertical line is the axis of the cover seat, and the horizontal line is perpendicular to the axis (vertical line) of the cover seat. Through the structural setting of the bottom of the above-mentioned guide groove, the contents at the inner circumference of the cover seat can flow into the guide groove more smoothly, and then pour out; and when the drinker's lips touch the guide groove, they will not feel uncomfortable.

[0068] In another embodiment of the present invention, a liquid packaging box is disclosed. The liquid packaging box is provided with a cover body of the liquid packaging box in the above embodiment. The contents poured out of the liquid packaging box mostly flow to the tip of the tongue, effectively preventing the problem of "choking the throat" caused by the excessive flow of the contents. The drinking experience is better, and compared with using a cover body of the same caliber, the packaging performance of the liquid packaging box can be significantly improved.

[0069] The above is only a specific embodiment of the present invention. Under the above teachings of the present invention, those skilled in the art can make other improvements or modifications on the basis of the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present invention, and the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A cover for a liquid packaging box, It is characterized in that It includes a cap, an inner cut piece and a cap seat; The cover seat is fixed on the liquid packaging box, the cover cap is located on the outside of the cover seat, and the inner cutting piece is located inside the cover seat. The cover cap, the inner cutting piece and the cover seat have a force transmission device, so that when the cover is opened for the first time, the cover cap first drives the inner cutting piece to move axially from a first position to a second position inside the cover seat and pierce the sealing layer of the liquid packaging box. Thereafter, the inner cutting piece rotates around the axial direction under the drive of the cover cap to cut the sealing layer of the liquid packaging box to form an opening; When the contents in the liquid packaging box flow out from the cover body, at least one drop is generated.

2. The cover of the liquid packaging box according to claim 1, It is characterized in that The internal cutting piece includes a connecting section and a puncture section from top to bottom, the lower end of the puncture section is provided with cutting teeth, the inner diameter of the connecting section is larger than the inner diameter of the puncture section, and a drop is generated when the contents flow from the puncture section on the internal cutting piece to the connecting section.

3. The cover of the liquid packaging box according to claim 2, It is characterized in that The connecting section and the puncture section are connected via an inclined section.

4. The cover of the liquid packaging box according to claim 3, It is characterized in that The obtuse angle formed between the inner side wall of the inclined section and the inner side wall of the connecting section is 135° to 160°.

5. The cover of the liquid packaging box according to any one of claims 1 to 4, It is characterized in that The inner circumferential upper edge of the cover seat is lower than the outer circumferential upper edge of the cover seat, and when the content flows out of the cover body, a drop is generated between the inner circumferential upper edge of the cover seat and the outer circumferential upper edge of the cover seat.

6. The cover of the liquid packaging box according to claim 5, It is characterized in that The end of the cover seat is between the inner circumferential upper edge of the cover seat and the outer circumferential upper edge of the cover seat, and the end of the cover seat is a slope or chamfer arranged along the circumference.

7. The cover of the liquid packaging box according to claim 6, It is characterized in that The cover seat is provided with a guide groove, and the guide groove is at least partially arranged at the end of the cover seat.

8. The cover of the liquid packaging box according to claim 7, It is characterized in that The bottom of the guide groove is inclined toward the outer circumferential upper edge of the cover seat.

9. The cover of the liquid packaging box according to claim 8, It is characterized in that The bottom of the guide groove includes a first inclined surface, an upper convex arc surface and a second inclined surface; The first inclined surface is connected to the inner circumferential surface of the cover seat, the second inclined surface is connected to the upper edge of the outer circumference of the cover seat, and the upper convex arc surface is connected between the first inclined surface and the second inclined surface; The angle formed between the first inclined plane and the vertical line is 7° to 20°, and the angle formed between the second inclined plane and the horizontal line is 60° to 80°; wherein the vertical line is the axis center line of the cover seat.

10. The cover of the liquid packaging box according to claim 7, It is characterized in that One end of the guide groove extends to the inner circumferential surface of the cover seat, and the other end of the guide groove extends to the upper edge of the outer circumference of the cover seat or the end of the cover seat.

11. The cover of the liquid packaging box according to claim 10, It is characterized in that The width of the guide groove decreases along the liquid outflow direction.

12. The cover of the liquid packaging box according to claim 11, It is characterized in that The guide groove is a fan-shaped groove, the arc end of the fan-shaped groove is located on the inner circumferential surface of the cover seat, and the center end of the fan-shaped groove is located on the outer circumferential upper edge of the cover seat or the end of the cover seat.

13. The cover of the liquid packaging box according to claim 10, It is characterized in that The width of the guide groove increases along the liquid outflow direction.

14. The cover of the liquid packaging box according to claim 13, It is characterized in that The guide groove is a double-fan-shaped groove, a diamond-cut groove or a spout-shaped groove.

15. A liquid packaging box, It is characterized in that The liquid packaging box is provided with the cover of the liquid packaging box according to any one of claims 1 to 14.

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