Rotary puncture cover for soft bag

Abstract

The utility model discloses a rotary puncture cover for a soft bag, which comprises an upper cover and a base, a puncture inner cutter is arranged in the base, the upper cover comprises a cover body, a first internal thread is arranged on the inner wall of the cover body, a screwing structure is arranged on the inner side of the top of the cover body, and the screwing structure is inserted into the puncture inner cutter; the base comprises a straw, a connecting flange is arranged on the outer wall of the lower end of the straw, first external threads are arranged on the outer wall of the straw, second internal threads are arranged on the inner wall of the straw, and the rotating direction of the second internal threads is opposite to that of the first external threads; the puncturing inner cutter comprises a cutter body, the outer wall of the cutter body is provided with second external threads in threaded connection with the second internal threads, the lower end of the cutter body is provided with thorns, and the inner wall of the cutter body is provided with a plurality of second shifting plates. The bottle cap has the advantages that a sealing film in a soft bag can be punctured while the bottle cap is opened, and operation is easy and convenient; the structure of the rotary puncture cover is simplified, and the structural complexity and the manufacturing difficulty are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of soft bag cap technology, specifically a rotary puncture cap for soft bags. Background Technology

[0002] Currently, many beverages on the market are packaged in flexible bags. For drinks such as juice, jelly, carbonated beverages, milk, and yogurt, flexible bags offer advantages such as ease of packaging, carrying, and use. Therefore, flexible bags have been widely used in the beverage packaging industry.

[0003] Because of the soft texture of the soft bag, the liquid stored inside is easily shaken during handling, which can cause the liquid to leak out through the spout cap. For example, a spout cap with a directional gas collection valve, disclosed in patent publication CN220263726U, only has one seal with the soft bag. As the bag shakes during handling, liquid leakage is likely to occur. Therefore, considering the sealing issue, in addition to sealing the soft bag with the spout cap, a sealing film needs to be placed inside the soft bag near the spout cap. This double seal, formed by the sealing film and the spout cap, ensures the bag's sealing effect. However, the addition of the sealing film renders existing spout caps unusable, as they cannot puncture the sealing film inside the soft bag. Therefore, there is an urgent need to develop a spout cap with puncture capability. Utility Model Content

[0004] The purpose of this invention is to provide a rotating puncture cap for soft bags to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rotating puncture cap for soft bags, comprising an upper cap and a base, wherein the base is provided with a puncture internal cutting blade, the upper cap comprises a cap body, the inner wall of the cap body is provided with a first internal thread, and the top inner side of the cap body is provided with a screwing structure, the screwing structure being inserted into the interior of the puncture internal cutting blade; the base comprises a straw, the lower end of the straw is provided with a connecting flange on its outer wall, the outer wall of the straw is provided with a first external thread that is screwed into the first internal thread, the inner wall of the straw is provided with a second internal thread, the rotation direction of the second internal thread being opposite to the rotation direction of the first external thread; the puncture internal cutting blade comprises a cutting blade body, the cutting blade body being a hollow cylindrical structure, its outer wall being provided with a second external thread that is screwed into the second internal thread, the lower end of the cutting blade body being provided with a thorn, and the inner wall of the cutting blade body being provided with a plurality of second levers that cooperate with the screwing structure.

[0006] Further preferably, the lower end of the cutter body is provided with a thorn, the thorn is a hollow cone structure, and the side wall of the thorn is provided with a number of liquid outlet holes. The liquid outlet holes are connected to the hollow cavity of the cutter body through the hollow cavity of the thorn, so as to realize the liquid out of the soft bag.

[0007] Further preferably, the tip of the thorn is provided with a cutting groove, which is cut along the tapered half of the thorn to improve the thorn's cutting and piercing capabilities.

[0008] Further preferably, the lower end of the cutter body is provided with multiple thorns, each thorn having a V-shaped structure with its tip pointing downwards. The multiple thorns are spaced apart along the circumferential direction of the lower end face of the cutter body. The multiple thorns can pierce the sealing membrane, and the rotation of the multiple thorns can effectively improve the piercing ability of the inner cutter.

[0009] Further preferably, the upper end of the outer wall of the cutter body is provided with a plurality of fourth limiting protrusions for limiting the rotational position of the cutter body.

[0010] Further preferably, the screwing structure includes a vertical plate, which is a rectangular vertical plate. There are multiple vertical plates, all of which are arranged in a radiating pattern with the central axis of the cover body as the connecting line. Each vertical plate has a first lever connected to its side away from the central axis of the cover body. The vertical plate and the first lever can drive the second lever inside the cutter body to rotate.

[0011] In a further preferred embodiment, the number of the second pusher plates is the same as the number of the vertical plates, and each second pusher plate is inserted between two vertical plates and the first pusher plate connected to the vertical plates, ensuring that when the rotating and twisting structure is in operation, the vertical plates and the first pusher plate can push the second pusher plate to rotate synchronously, thereby driving the puncture inner cutting knife to move downward and puncture the sealing film of the soft bag.

[0012] Further preferably, a sealing ring is provided on the inner side of the top of the cap body. The sealing ring is located on the outside of the screw-on structure and on the inside of the straw. It is used to seal when the cap and the base are joined, which can prevent the liquid in the soft bag from flowing out during repeated use and sealing. The lower end of the cap body is connected to an anti-theft ring. The inner side of the anti-theft ring is provided with several first limiting protrusions, which can effectively prevent the product from being counterfeited or tampered with, and ensure the authenticity and legality of the liquid in the soft bag.

[0013] In a further preferred embodiment, the lower end of the outer wall of the straw is provided with a raised limiting ring, which is located above the connecting flange. Several second limiting protrusions are connected to the lower side of the limiting ring. The second limiting protrusions are set in conjunction with the first limiting protrusions to limit the installation of the anti-theft ring and ensure the anti-theft effect of the anti-theft ring.

[0014] Further preferably, the inner wall of the straw is provided with a third limiting protrusion at both ends of the second internal thread, which is used to limit the up and down rotation of the cutter body, and plays a foolproof role, which can effectively prevent the cutter body from falling out of the straw; there are two connecting flanges symmetrically arranged on both sides of the straw, and the connecting flanges are V-shaped. Each connecting flange has multiple horizontally concave grooves on its two vertical sides, so that the connection between the connecting flange and the soft bag forms a multi-seal structure, which improves the connection firmness and sealing performance between the soft bag and the rotating puncture cap.

[0015] Beneficial effects: The rotating puncture cap for the soft bag of this utility model is connected to the base by rotation of the top cover and the base by rotation of the puncture inner cutter. A screwing structure is set in the top cover, which is connected to the second plate of the puncture inner cutter. When the top cover is rotated, the puncture inner cutter can be rotated relative to the base. That is, when the top cover is rotated and removed, the puncture inner cutter can be rotated downward and the thorns of the puncture inner cutter can puncture the sealing film inside the soft bag, so that the suction tube of the base, the puncture inner cutter and the inside of the soft bag are interconnected, making it easy for the liquid inside the soft bag to be sucked out or poured out through the suction tube.

[0016] The rotating connection between the top cover, base, and puncture blade allows for easy removal of the top cover to puncture the sealing film inside the soft pouch, making the operation simple and convenient. The foolproof design of the base and puncture blade ensures the rotating puncture cap can be reused multiple times without the puncture blade detaching from the base. The anti-theft design between the top cover and base effectively guarantees the authenticity of the liquid inside the soft pouch, enhancing security. The sealing ring design, working in conjunction with the sealing film inside the soft pouch, further improves the bag's sealing performance.

[0017] This rotating puncture cap not only punctures the sealing film inside the soft bag, but also has a sealing capability, which can effectively ensure the sealing effect of the soft bag. By making the rotating puncture cap into three parts—the top cover, the base, and the puncture inner cutting blade—the structure of the rotating puncture cap is simplified, effectively reducing structural complexity and manufacturing difficulty. Attached Figure Description

[0018] Figure 1 This is an isometric structural schematic diagram of the rotary puncture cap for soft bags disclosed in the embodiments of this utility model;

[0019] Figure 2 This is a schematic front view of the rotating puncture cap for soft bags disclosed in an embodiment of the present utility model.

[0020] Figure 3 This is an isometric structural diagram of the upper cover disclosed in the embodiment of this utility model;

[0021] Figure 4This is a schematic diagram of the base from one perspective of an embodiment of the present utility model.

[0022] Figure 5 This is an isometric structural schematic diagram of the base disclosed in an embodiment of the present utility model from another perspective.

[0023] Figure 6 This is an exploded structural diagram of the rotary puncture cap for soft bags disclosed in Embodiment 1 of this utility model;

[0024] Figure 7 This is a schematic diagram of the puncture internal cutting knife from one perspective of the present utility model embodiment 1.

[0025] Figure 8 This is an isometric structural diagram of the puncture incision knife disclosed in Embodiment 1 of this utility model from another perspective.

[0026] Figure 9 This is a cross-sectional view of the rotating puncture cap for a soft bag disclosed in Embodiment 1 of this utility model when it is in an unpunctured state.

[0027] Figure 10 This is a cross-sectional view of the rotating puncture cap for a soft bag disclosed in Embodiment 1 of this utility model when it is in a punctured state.

[0028] Figure 11 This is an exploded structural diagram of the rotary puncture cap for soft bags disclosed in Embodiment 2 of this utility model;

[0029] Figure 12 This is a schematic diagram of the puncture internal cutting knife from one perspective of the present utility model embodiment 2.

[0030] Figure 13 This is an isometric structural diagram of the puncture incision knife disclosed in Embodiment 2 of this utility model from another perspective;

[0031] Figure 14 This is a cross-sectional view of the rotating puncture cap for a soft bag in an unpunctured state, as disclosed in Embodiment 2 of this utility model.

[0032] Figure 15 This is a cross-sectional view of the rotating puncture cap for a soft bag in the punctured state as disclosed in Embodiment 2 of this utility model.

[0033] Reference numerals: 1-Top cover, 11-Cover body, 111-First internal thread, 12-Twisting structure, 121-Vertical plate, 122-First lever plate, 13-Anti-theft ring, 131-First limiting protrusion, 14-Sealing ring, 2-Base, 21-Strut, 211-First external thread, 212-Second internal thread, 213-Limiting ring, 214-Second limiting protrusion, 215-Third limiting protrusion, 22-Connecting flange, 221-Groove, 3-Piercing internal cutter, 31-Cutter body, 311-Second external thread, 312-Second lever plate, 313-Fourth limiting protrusion, 32-Thorn, 321-Cutting groove, 322-Liquid outlet. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] like Figure 1-5 As shown, a rotary puncture cap for soft bags is assembled onto soft bags. In use, it punctures the sealing film on the soft bag, facilitating the extraction or pouring of liquid from inside. The rotary puncture cap includes an upper cover 1 and a base 2. The base 2 contains a puncture cutter 3. The upper cover seals the base 2, forming a sealed structure to prevent liquid leakage from the soft bag. The base 2 connects to the soft bag, allowing the rotary puncture cap to be installed on it. The puncture cutter 3 punctures the sealing film inside the soft bag, facilitating the outflow of liquid.

[0036] In this application, the cover 1 includes a cover body 11. The inner wall of the cover body 11 is provided with a first internal thread 111 for screwing onto the base 2, making it easy for the cover body 11 to be screwed onto or off the base 2. The top inner side of the cover body 11 is provided with a screwing structure 12, which is inserted into the interior of the piercing inner cutter 3. By setting the screwing structure 12, when the cover body 11 is rotated, the piercing inner cutter 3 can be driven to rotate downwards simultaneously, so that the piercing inner cutter 3 can pierce the sealing film inside the soft bag. The base 2 includes a straw 21 for sucking out liquid from the soft bag or pouring out liquid from the soft bag. The lower outer wall of the straw 21 is provided with a connecting flange 22 for connecting the base 2 to the soft bag, generally by heat sealing. The outer wall of the straw 21 is provided with a first external thread 211, which is screwed into the first internal thread 111 to realize the rotational installation of the upper cover 1 onto the base 2; the inner wall of the straw 21 is provided with a second internal thread 212 for screwing into the piercing inner cutter 3 to realize the rotational movement of the piercing inner cutter 3, and the rotation direction of the second internal thread 212 is opposite to the rotation direction of the first external thread 211, so that when the upper cover 1 is unscrewed from the straw 21, the piercing inner cutter 3 is driven to move downward relative to the straw 21, and the piercing inner cutter 3 is driven to pierce the sealing film of the soft bag and insert into the inside of the soft bag, thereby realizing the suction or pouring out of the liquid in the soft bag through the straw 21. The piercing inner cutter 3 includes a cutter body 31, which is a hollow cylindrical structure that allows liquid to flow in or out of the cutter body 31. The outer wall of the cutter body 31 has a second external thread 311, which is screwed onto the second internal thread 212, allowing the cutter body 31 to be screwed onto the straw 21, facilitating the screwing of the piercing inner cutter 3 onto or off the base 2. The lower end of the cutter body 31 has a thorn 32 for piercing the sealing film of the soft bag. The inner wall of the cutter body 31 has several second levers 312 that cooperate with the screwing structure 12. When the upper cover 1 rotates upward relative to the straw 21, the screwing structure 12 simultaneously rotates the second levers 312, causing the cutter body 31 to move downward relative to the straw 21. When the upper cover 1 is screwed off, the piercing inner cutter 3 moves downward and pierces the sealing film of the soft bag, entering the interior of the soft bag.

[0037] Example 1

[0038] like Figure 6-10As shown, in this embodiment, the lower end of the cutter body 31 is provided with a thorn 32. The thorn 32 is a hollow cone structure, that is, it forms a sharp cone piercing structure, which makes it easy to pierce the sealing film of the soft bag. The side wall of the thorn 32 is provided with several liquid outlet holes 322. The liquid outlet holes 322 are connected to the hollow cavity of the cutter body 31 through the hollow cavity of the thorn 32. That is, through the setting of the liquid outlet holes 322, the liquid in the soft bag can enter the hollow cavity of the thorn 322 through the liquid outlet holes 322, and then enter the hollow cavity of the cutter body 31, and finally flow out through the hollow cavity of the straw 21.

[0039] In this embodiment, the upper part of the outer wall of the cutter body 31 is provided with a number of fourth limiting protrusions 313, which are used to limit the rotational movement of the cutter body 31, ensuring that the cutter body 31 stops after moving up or down relative to the straw 21 to a set position, and will not fall out of the hollow cavity of the straw 21, thus achieving a foolproof effect.

[0040] In this embodiment, the screwing structure 12 includes a vertical plate 121, which is a rectangular vertical plate. There are multiple vertical plates 121, and they are all arranged in a divergent manner with the central axis of the cover body 11 as the connecting line. A gap is formed between each pair of adjacent vertical plates 121 to facilitate the insertion of the second deflector plate 312 on the inner wall of the cutter body 31. The first deflector plate 122 is connected to the side of each vertical plate 121 that is away from the central axis of the cover body 11 to limit the second deflector plate 312. When the screwing structure 12 rotates synchronously with the cover body 11, it can drive the cutter body 31 to rotate synchronously, that is, drive the piercing inner cutter 3 to rotate synchronously. The upper cover 1 rotates upward, and the piercing inner cutter 3 moves downward in the opposite direction, thereby piercing the sealing film of the soft bag.

[0041] In this embodiment, the number of second levers 312 is the same as the number of vertical plates 121. Each second lever 312 is inserted between two vertical plates 121 and the first lever 122 connected to the vertical plates 121. That is, multiple vertical plates 121 can form a corresponding number of gaps for the insertion of a corresponding number of second levers 312. Then, as the vertical plates 121 rotate, the corresponding number of first levers 122 push the second levers 312 to rotate synchronously, thereby realizing the rotation structure 12 pushing the piercing inner cutting knife 3 to rotate. In this solution, there are three vertical plates 121, and the three vertical plates 212 form a trident star structure, connected to three first levers 122. There are three corresponding second levers 312, which are inserted and connected to the three vertical plates 212 and the three first levers 122 respectively. The three first levers 122 can simultaneously move the three second levers 312, driving the three second levers 312 to drive the cutting knife body 31 to rotate.

[0042] In this embodiment, a sealing ring 14 is provided on the inner side of the top of the cap body 11. The sealing ring 14 is located outside the screw-on structure 12 and inside the straw 21. With the setting of the sealing ring 14, when the cap body 11 is screwed onto the base 2, the sealing ring 14 can abut against the straw 21 and form a sealing structure, thereby enhancing the sealing performance between the cap 1 and the base 2. The lower end of the cap body 11 is connected to an anti-theft ring 13, which plays a role in anti-counterfeiting and improving the safety of use. It can effectively prevent the product from being counterfeited or tampered with, and ensure the authenticity and legality of the liquid in the soft bag. The inner side of the anti-theft ring 13 is provided with several first limiting protrusions 131, which are used to limit the distance between the cap 1 and the base 2, preventing the cap 1 and the base 2 from rotating relative to each other. That is, it can prevent the cap 1 from being unscrewed off the base 2 at will, thus playing an anti-theft role. The anti-theft ring 13 is connected to the bottom of the cover body 11 by a reinforcing rib. When the cover body 11 is rotated vigorously, the reinforcing rib between the anti-theft ring 13 and the cover body 11 can be broken, thus enabling the cover body 11 to rotate. At this time, the anti-theft ring 13 is destroyed, indicating that the rotary puncture cover has been used.

[0043] In this embodiment, a raised limiting ring 213 is provided at the lower end of the outer wall of the straw 21. The limiting ring 213 is located above the connecting flange 22 and is used to limit the installation of the anti-theft ring 13. Several second limiting protrusions 214 are connected to the lower side of the limiting ring 213. The second limiting protrusions 214 are set in conjunction with the first limiting protrusion 131. That is, the second limiting protrusions 214 abut against the first limiting protrusion 131 to limit the rotation of the anti-theft ring 13, thereby limiting the rotation of the upper cover 1, realizing the anti-counterfeiting function of the anti-theft ring 13 and improving the safety of use.

[0044] In this embodiment, a third limiting protrusion 215 is provided on the inner wall of the straw 21 at both ends of the second internal thread 212. This protrusion cooperates with the fourth limiting protrusion 313 on the cutter body 31 to limit the vertical rotation of the cutter body 31 relative to the straw 21, thus preventing the inner cutter 3 from falling out of the base 2 during repeated use of the rotating puncture cap. Two connecting flanges 22 are symmetrically arranged on both sides of the straw 21. The connecting flanges 22 have a V-shaped structure, facilitating sealing between the connecting flanges 22 and the soft bag. Each connecting flange 22 has multiple horizontally recessed grooves 221 on its two vertical sides, forming a multi-layered sealing structure between the connecting flange 22 and the soft bag, improving sealing performance.

[0045] In another embodiment, the tip of the thorn 32 is provided with a cutting groove 321. The cutting groove 321 is cut along the tapered half of the thorn 32 to achieve a rotary cutting effect. When the thorn 32 rotates with the cutter body 31, the cutting groove 321 can enhance the side cutting effect and improve the cutting effect of the piercing inner cutter 3 on the sealing film.

[0046] Example 2

[0047] like Figure 11-15 As shown, unlike Embodiment 1, in this embodiment, the lower end of the cutter body 31 is provided with multiple thorns 32. The thorns 32 are V-shaped structures with the tips pointing downwards. The multiple thorns 32 are spaced apart along the circumferential direction of the lower end face of the cutter body 31, and are inserted into the sealing film of the soft bag through the multiple thorns 32. As the cutter body 31 rotates, the sealing film is torn from multiple points, which has a good tearing effect on the sealing film of the soft bag. The liquid in the soft bag can directly enter the hollow cavity of the cutter body 31 and then flow out through the straw 21.

[0048] In this embodiment, the multiple spikes 32 can be V-shaped structures of the same size and shape, or V-shaped structures of the same shape but different sizes, or V-shaped structures of the same shape but different sizes but different shapes. The shape of the spikes 32 can also be a V-shaped structure set at an angle, as long as it is ensured that the spikes 32 can pierce the sealing film of the soft bag.

[0049] In the above embodiment, the usage process of the rotating puncture cap is as follows: When in use, rotate the cap body 11 of the upper cap 1 to forcibly break the anti-theft ring 13, so that the anti-theft ring 13 is separated from the cap body 11. Then, the cap body 11 rotates upward relative to the suction tube 21 of the base 2. Then, the screwing structure 12 connected inside the cap body 11 drives the second deflector 312 of the cutter body 31 of the puncture inner cutter 3 to rotate synchronously, so that the cutter body 31 moves downward relative to the suction tube 21. That is, the upper cap 1 rotates upward relative to the base 2, and the puncture inner cutter 3 rotates downward relative to the base 2. The thorns 32 of the puncture inner cutter 3 pierce the sealing film inside the soft bag. As the upper cap 1 continues to rotate, the screwing structure 12 separates from the cutter body 31. The puncture inner cutter 3 remains stationary, while the upper cap 1 continues to move upward and then separates from the base 2, that is, the upper cap 1 is screwed off the base 2. At this time, it is convenient to suck out or pour out the liquid in the soft bag through the suction tube 21.

[0050] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A rotary piercing cap for soft bags, comprising an upper cap (1) and a base (2), characterized in that: The base (2) is provided with a puncture inner cutter (3), the upper cover (1) comprises a cover body (11), the inner wall of the cover body (11) is provided with a first inner thread (111), the inner side of the top of the cover body (11) is provided with a screwing structure (12), the screwing structure (12) is inserted into the inside of the puncture inner cutter (3); the base (2) comprises a suction tube (21), the outer wall of the lower end of the suction tube (21) is provided with a connecting flange (22), the outer wall of the suction tube (21) is provided with a first outer thread (211) which is screwed with the first inner thread (111), the inner wall of the suction tube (21) is provided with a second inner thread (212), the rotation direction of the second inner thread (212) is opposite to that of the first outer thread (211); the puncture inner cutter (3) comprises a cutter body (31), the cutter body (31) is a hollow cylindrical structure, the outer wall of the cutter body (31) is provided with a second outer thread (311) which is screwed with the second inner thread (212), the lower end of the cutter body (31) is provided with a barb (32), the inner wall of the cutter body (31) is provided with a plurality of second levers (312) which cooperate with the screwing structure (12).

2. The rotating piercing cap for soft bags according to claim 1, characterized in that: The lower end of the cutter body (31) is provided with a barb (32), the barb (32) is a hollow cone structure, a plurality of liquid outlet holes (322) are formed in the side wall of the barb (32), and the liquid outlet holes (322) are communicated with the hollow cavity of the cutter body (31) through the hollow cavity of the barb (32).

3. The rotating pierceable closure for a soft pouch according to claim 2, wherein: The tip of the barb (32) is provided with a cutting groove (321), and the cutting groove (321) is formed by cutting along the taper half face of the barb (32).

4. The rotating pierceable closure for soft pouches of claim 1, wherein: The lower end of the cutter body (31) is provided with a plurality of barbs (32), the barbs (32) are V-shaped structures with the tips downward, and the plurality of barbs (32) are arranged at intervals along the circumferential direction of the lower end face of the cutter body (31).

5. A spin-pierceable closure for a flexible pouch according to claim 2, 3 or 4, characterised in that: The outer wall of the cutter body (31) is provided with a plurality of fourth limiting protrusions (313) at the upper end.

6. The rotating pierceable closure for a soft pouch of claim 1, wherein: The screwing structure (12) comprises vertical plates (121), the vertical plates (121) are rectangular vertical plates, a plurality of vertical plates (121) are arranged in a diverging manner with the central axis of the cover body (11) as the connecting line, and the side edge of each vertical plate (121) away from the central axis of the cover body (11) is connected with a first lever (122).

7. A spin-pierceable closure for a soft pouch according to claim 6, characterised in that: The number of the second levers (312) is the same as that of the vertical plates (121), and each second lever (312) is inserted between two vertical plates (121) and the first lever (122) connected by the vertical plates (121).

8. The rotating pierceable closure for soft pouches of claim 1, wherein: The top inner side of the cover body (11) is provided with a sealing ring (14), the sealing ring (14) is located outside the screwing structure (12) and inside the suction tube (21), the lower end of the cover body (11) is connected with an anti-theft ring (13), and the inner side of the anti-theft ring (13) is provided with a plurality of first limiting protrusions (131).

9. The rotating pierceable closure for a soft pouch according to claim 8, wherein: The outer wall lower end of the straw (21) is provided with a ring of protruding limiting ring (213), the limiting ring (213) is located above the connecting flange (22), the lower side of the limiting ring (213) is connected with a plurality of second limiting protrusions (214), the second limiting protrusions (214) are matched with the first limiting protrusions (131).

10. The rotating pierceable closure for a soft pouch according to claim 1, wherein: The inner wall of the straw (21) and located at both ends of the second internal thread (212) is provided with a third limiting protrusion (215), the connecting flange (22) is two and symmetrically arranged on both sides of the straw (21), the connecting flange (22) is V-shaped structure, a plurality of horizontal concave grooves (221) are arranged on the two vertical side surfaces of each connecting flange (22).

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