Rotary puncture cover for soft bag

Abstract

The invention 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, the inner wall of the cover body is provided with a first internal thread, the inner side of the top of the cover body is provided with a screwing structure, 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 beneficial effects that a sealing film in a soft bag can be punctured while the cap is opened, and the operation is simple 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] The present invention relates to the technical field of soft package lids, and specifically to a rotary puncture lid for a soft package bag. Background Art

[0002] Currently, many beverages on the market are mostly packaged in soft package bags. For example, fruit juice beverages, jelly beverages, carbonated beverages, milk, yogurt and other drinks. Packaging with soft package bags has the advantages of convenient packaging, carrying and use. Therefore, soft package bags have been widely used in the field of beverage packaging.

[0003] Since the soft package bag is soft, the liquid stored therein is prone to shaking during handling, which may cause the liquid in the soft package bag to overflow through the suction nozzle lid on the soft package bag. For example, a suction nozzle tube lid with a gas collecting valve function disclosed in the patent publication number CN220263726U has only one seal with the soft package bag. With the shaking of the soft package bag during handling, it is very easy to have the problem of liquid leakage in the soft package bag. Therefore, considering the sealing problem, in addition to sealing the soft package bag through the suction nozzle lid, a sealing film also needs to be provided inside the soft package bag near the suction nozzle lid. Two seals are formed by the sealing film and the suction nozzle lid to ensure the sealing effect of the soft package bag. Since the sealing film is added, the existing suction nozzle lid can no longer be used, and it cannot puncture the sealing film in the soft package bag. Therefore, there is an urgent need to develop a suction nozzle lid with puncturing ability. Summary of the Invention

[0004] The purpose of the present invention is to provide a rotary puncture lid for a soft package bag to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A rotary puncture lid for a soft package bag, including an upper lid and a base. A puncture inner cutter is provided inside the base. The upper lid includes a lid body. The inner wall of the lid body is provided with a first internal thread. The inner side of the top of the lid body is provided with a screwing structure. The screwing structure is inserted inside the puncture inner cutter. The base includes a straw. A connecting flange is provided on the outer wall of the lower end of the straw. The outer wall of the straw is provided with a first external thread screwed with the first internal thread. A second internal thread is provided inside the straw. The rotation direction of the second internal thread is opposite to that of the first external thread. The puncture inner cutter includes a cutter body. The cutter body is a hollow cylindrical structure. The outer wall of the cutter body is provided with a second external thread screwed with the second internal thread. Thorns are provided at the lower end of the cutter body. A plurality of second dial plates for cooperating with the screwing structure are provided inside the cutter body.

[0006] Further preferably, a thorn is provided at the lower end of the cutter body. The thorn is a hollow cone structure, and a plurality of liquid outlet holes are provided on the side wall of the thorn. The liquid outlet holes are communicated with the hollow cavity of the cutter body through the hollow cavity of the thorn, so as to realize the outflow of the liquid in the flexible package bag.

[0007] Further preferably, a cutting groove is provided at the tip of the thorn. The cutting groove is formed by cutting along the taper half plane of the thorn, so as to improve the cutting and piercing ability of the thorn.

[0008] Further preferably, a plurality of thorns are provided at the lower end of the cutter body. The thorns are V-shaped structures with the tips facing downwards. The plurality of thorns are arranged at intervals along the circumferential direction of the lower end surface of the cutter body. The sealing film can be pierced through by the plurality of thorns, and the rotation of the plurality of thorns can effectively improve the piercing ability of the puncturing inner cutter.

[0009] Further preferably, a plurality of fourth limiting bumps are provided on the upper end of the outer wall of the cutter body for limiting the rotation position of the cutter body.

[0010] Further preferably, the screwing structure includes vertical plates. The vertical plates are rectangular vertical plates. There are a plurality of vertical plates, and all of them are arranged in a divergent manner with the central axis of the cover body as the connecting line. A first dial is correspondingly connected to the side of each vertical plate away from the central axis of the cover body. The second dial in the cutter body can be pushed to rotate through the vertical plates and the first dials.

[0011] Further preferably, the number of the second dials is the same as that of the vertical plates. Each second dial is correspondingly inserted between two vertical plates and the first dials connected to the vertical plates, so as to ensure that when the screwing structure is rotated, the vertical plates and the first dials can push the second dials to rotate synchronously, that is, to drive the puncturing inner cutter to move downwards and pierce the sealing film of the flexible package bag.

[0012] Further preferably, a sealing ring is provided on the inner side of the top of the cover body. The sealing ring is located outside the screwing structure and inside the straw, and is used for sealing when the upper cover and the base are combined, and can prevent the liquid in the flexible package bag from flowing out during the sealing process of multiple uses; a theft-proof ring is connected to the lower end of the cover body, and a plurality of first limiting bumps are provided on the inner side of the theft-proof ring, which can effectively prevent the product from being counterfeited or tampered with, and ensure the authenticity and legality of the liquid in the flexible package bag.

[0013] Further preferably, a raised limiting ring is provided on the lower end of the outer wall of the straw. The limiting ring is located above the connecting flange, and a plurality of second limiting bumps are connected to the lower side surface of the limiting ring. The second limiting bumps are arranged in cooperation with the first limiting bumps to realize the installation limit of the theft-proof ring and ensure the anti-theft effect of the theft-proof ring.

[0014] Further preferably, a third limiting protrusion is provided at both ends of the inner wall of the straw and located at both ends of the second internal thread for the up-and-down rotation limit of the cutter body, achieving an anti-fooling effect and effectively preventing the cutter body from falling off from the straw. There are two connecting flanges symmetrically arranged on both sides of the straw. The connecting flange has a V-shaped structure, and a plurality of horizontally concave grooves are provided on both vertical side surfaces of each connecting flange, so that a multi-channel sealing structure is formed at the connection between the connecting flange and the flexible package bag, improving the connection firmness and connection tightness between the flexible package bag and the rotary puncture cover.

[0015] Beneficial effects: For the rotary puncture cover for the flexible package bag of the present invention, through the rotary connection between the upper cover and the base, and the rotary connection between the base and the puncture internal cutter, and a screwing structure is arranged in the upper cover and connected to the second dial plate of the puncture internal cutter. When the upper cover is rotated, the puncture internal cutter can be driven to rotate relative to the base, that is, when the upper cover is rotated and removed, the puncture internal cutter can be rotated downward and the sealing film in the flexible package bag can be punctured through the spines of the puncture internal cutter, realizing the interconnection among the straw in the base, the puncture internal cutter and the inside of the flexible package bag, facilitating the liquid in the flexible package bag to be sucked out or poured out through the straw.

[0016] Through the mutual rotary connection of the upper cover, the base and the puncture internal cutter, the sealing film in the flexible package bag can be punctured while the upper cover is removed. The operation is simple and convenient. And through the anti-fooling design of the base and the puncture internal cutter, the rotary puncture cover can be used multiple times conveniently, and the puncture internal cutter will not fall off from the base. Through the anti-theft design between the upper cover and the base, the authenticity of the liquid in the flexible package bag can be effectively guaranteed, improving the safety. Through the design of the sealing ring, which cooperates with the sealing film in the flexible package bag, the sealing performance of the flexible package bag is further improved.

[0017] This rotary puncture cover can not only puncture the sealing film in the flexible package bag, but also has a sealing ability, effectively guaranteeing the sealing effect of the flexible package bag. By making the rotary puncture cover into three parts: the upper cover, the base and the puncture internal cutter, the structure of the rotary puncture cover is simplified, effectively reducing the structural complexity and the manufacturing difficulty. Description of the Drawings

[0018] Figure 1 It is an axonometric structural schematic diagram of the rotary puncture cover for the flexible package bag disclosed in the embodiment of the present invention.

[0019] Figure 2 It is a front view structural schematic diagram of the rotary puncture cover for the flexible package bag disclosed in the embodiment of the present invention.

[0020] Figure 3 It is an axonometric structural schematic diagram of the upper cover disclosed in the embodiment of the present invention.

[0021] Figure 4An isometric structural schematic diagram of the base disclosed in the embodiments of the present invention from one perspective;

[0022] Figure 5 An isometric structural schematic diagram of the base disclosed in the embodiments of the present invention from another perspective;

[0023] Figure 6 An exploded structural schematic diagram of the rotary puncture cap for a flexible packaging bag disclosed in Embodiment 1 of the present invention;

[0024] Figure 7 An isometric structural schematic diagram of the puncture internal cutter disclosed in Embodiment 1 of the present invention from one perspective;

[0025] Figure 8 An isometric structural schematic diagram of the puncture internal cutter disclosed in Embodiment 1 of the present invention from another perspective;

[0026] Figure 9 A cross-sectional structural schematic diagram of the rotary puncture cap for a flexible packaging bag disclosed in Embodiment 1 of the present invention when in an unpunctured state;

[0027] Figure 10 A cross-sectional structural schematic diagram of the rotary puncture cap for a flexible packaging bag disclosed in Embodiment 1 of the present invention when in a punctured state;

[0028] Figure 11 An exploded structural schematic diagram of the rotary puncture cap for a flexible packaging bag disclosed in Embodiment 2 of the present invention;

[0029] Figure 12 An isometric structural schematic diagram of the puncture internal cutter disclosed in Embodiment 2 of the present invention from one perspective;

[0030] Figure 13 An isometric structural schematic diagram of the puncture internal cutter disclosed in Embodiment 2 of the present invention from another perspective;

[0031] Figure 14 A cross-sectional structural schematic diagram of the rotary puncture cap for a flexible packaging bag disclosed in Embodiment 2 of the present invention when in an unpunctured state;

[0032] Figure 15 A cross-sectional structural schematic diagram of the rotary puncture cap for a flexible packaging bag disclosed in Embodiment 2 of the present invention when in a punctured state.

[0033] Reference numerals: 1 - upper cover, 11 - cover body, 111 - first internal thread, 12 - screwing structure, 121 - vertical plate, 122 - first dial plate, 13 - anti-theft ring, 131 - first limiting projection, 14 - sealing ring, 2 - base, 21 - straw, 211 - first external thread, 212 - second internal thread, 213 - limiting ring, 214 - second limiting projection, 215 - third limiting projection, 22 - connecting flange, 221 - groove, 3 - puncturing internal cutter, 31 - cutter body, 311 - second external thread, 312 - second dial plate, 313 - fourth limiting projection, 32 - spines, 321 - cutting groove, 322 - liquid outlet hole. Detailed implementation manners

[0034] The following are specific embodiments of the present invention and in combination with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0035] As Figures 1-5 shown, a rotary puncturing cover for a flexible package bag is used to be assembled on the flexible package bag. When in use, it can puncture the sealing film on the flexible package bag to facilitate sucking out or pouring out the liquid in the flexible package bag. The rotary puncturing cover includes an upper cover 1 and a base 2. A puncturing internal cutter 3 is provided in the base 2. Among them, the upper cover is used to seal the base 2 and can form a sealing structure to prevent the liquid in the flexible package bag from flowing out; the base 2 is used to connect with the flexible package bag to install the rotary puncturing cover on the flexible package bag; the puncturing internal cutter 3 is used to puncture the sealing film in the flexible package bag to facilitate the liquid in the flexible package bag to flow out.

[0036] In the solution of this application, the upper 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 with the base 2, facilitating screwing the cover body 11 onto the base 2 or unscrewing it from the base 2. Inside the top of the cover body 11, there is a screwing structure 12. The screwing structure 12 is inserted into the interior of the puncturing and internal cutting knife 3. Through the arrangement of the screwing structure 12, when the cover body 11 is rotated, the puncturing and internal cutting knife 3 can be simultaneously driven to rotate downward, enabling the puncturing and internal cutting knife 3 to pierce the sealing film inside the flexible packaging bag. The base 2 includes a straw 21 for sucking out the liquid inside the flexible packaging bag or pouring out the liquid inside the flexible packaging bag. On the outer wall of the lower end of the straw 21, there is a connecting flange 22 for connecting the base 2 to the flexible packaging bag, usually through heat sealing. On the outer wall of the straw 21, there is a first external thread 211. The first external thread 211 is screwed with the first internal thread 111 to realize the rotational installation of the upper cover 1 on the base 2. Inside the inner wall of the straw 21, there is a second internal thread 212 for screwing with the puncturing and internal cutting knife 3 to realize the rotational movement of the puncturing and internal cutting knife 3. And the rotational direction of the second internal thread 212 is opposite to that of the first external thread 211, facilitating driving the puncturing and internal cutting knife 3 to move downward relative to the straw 21 when the upper cover 1 is unscrewed from the straw 21, driving the puncturing and internal cutting knife 3 to pierce the sealing film of the flexible packaging bag and insert into the interior of the flexible packaging bag, thereby realizing sucking out or pouring out the liquid inside the flexible packaging bag through the straw 21. The puncturing and internal cutting knife 3 includes a knife body 31. The knife body 31 is a hollow cylindrical structure to enable the liquid to flow out or flow into through the knife body 31. On the outer wall of the knife body 31, there is a second external thread 311. Through screwing the second external thread 311 with the second internal thread 212, the screwing connection between the knife body 31 and the straw 21 is realized, facilitating screwing the puncturing and internal cutting knife 3 onto or off the base 2. At the lower end of the knife body 31, there are spines 32 for piercing the sealing film of the flexible packaging bag. Inside the inner wall of the knife body 31, there are several second dial plates 312 that cooperate with the screwing structure 12. That is, when the upper cover 1 rotates upward relative to the straw 21, the second dial plates 312 can be synchronously rotated through the screwing structure 12, rotating the knife body 31 to move downward relative to the straw 21. That is, when the upper cover 1 is unscrewed, the puncturing and internal cutting knife 3 can be driven to move downward and pierce the sealing film of the flexible packaging bag and enter the interior of the flexible packaging bag.

[0037] Example 1

[0038] As Figures 6-10As shown, in the present embodiment, a thorn 32 is provided at the lower end of the cutter body 31, and the thorn 32 is a hollow cone structure, that is, a pointed cone piercing structure is formed, which is convenient for piercing the sealing film of the soft bag; a plurality of liquid outlet holes 322 are provided on the side wall of the thorn 32, and the liquid outlet holes 322 are connected with 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, it is convenient for the liquid in the soft bag to 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, a plurality of fourth limiting protrusions 313 are provided at the upper end of the outer wall of the cutter body 31, which are used to limit the rotational movement of the cutter body 31, thereby ensuring that the cutter body 31 stops after moving upward or downward to a set position relative to the straw 21, and does not fall out of the hollow cavity of the straw 21, thereby achieving an anti-mistake 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 divergently arranged with the central axis of the cover body 11 as the connecting line. A gap is formed between each two adjacent vertical plates 121 to facilitate the insertion of the second dial plate 312 on the inner wall of the cutter body 31, and cooperate with the first dial plate 122 correspondingly connected to the side of each vertical plate 121 away from the central axis of the cover body 11 to form a limit for the second dial 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 puncture inner cutter 3 to rotate synchronously, the upper cover 1 rotates upward, and the puncture inner cutter 3 moves downward in the opposite direction, thereby puncturing the sealing film of the soft package bag.

[0041] In this embodiment, the number of second dial plates 312 is the same as the number of vertical plates 121, and each second dial plate 312 is correspondingly inserted between two vertical plates 121 and the first dial plates 122 connected to the vertical plates 121, that is, multiple vertical plates 121 can form a corresponding number of gaps for the corresponding number of second dial plates 312 to be inserted, and then as the vertical plates 121 rotate, the corresponding number of first dial plates 122 push the second dial plates 312 to rotate synchronously, so that the screwing structure 12 pushes the puncture endometrial cutter 3 to rotate. In this solution, there are three vertical plates 121, and the three vertical plates 212 form a three-pointed star emblem structure, which is connected to three first dial plates 122. There are three corresponding second dial plates 312, which are respectively inserted and connected with the three vertical plates 212 and the three first dial plates 122. The three first dial plates 122 can simultaneously push the three second dial plates 312, and drive the three second dial plates 312 to drive the cutter body 31 to rotate.

[0042] In this embodiment, a sealing ring 14 is provided on the inner side of the top of the cover body 11. The sealing ring 14 is located outside the screwing structure 12 and inside the straw 21. Through the arrangement of the sealing ring 14, when the cover body 11 is screwed onto the base 2, the sealing ring 14 can abut against the straw 21 to form a sealing structure, strengthening the sealing performance between the upper cover 1 and the base 2. A security ring 13 is connected to the lower end of the cover body 11, which plays a role in anti-counterfeiting and improving the use safety. It can effectively prevent the product from being counterfeited or tampered with, ensuring the authenticity and legality of the liquid in the flexible packaging bag. A number of first limiting protrusions 131 are provided on the inner side of the security ring 13 for limiting with the base 2 to prevent relative rotation between the upper cover 1 and the base 2, that is, it can prevent the upper cover 1 from being unscrewed from the base 2 at will, playing an anti-theft role. Among them, the security ring 13 is connected to the bottom of the cover body 11 through a reinforcing rib. When the cover body 11 is rotated forcefully, the reinforcing rib between the security ring 13 and the cover body 11 can be broken, realizing the rotation of the cover body 11. At this time, the security ring 13 is damaged, indicating that the rotary puncture cap 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 for the installation limit of the security ring 13; a number of second limiting protrusions 214 are connected to the lower side of the limiting ring 213. The second limiting protrusions 214 are arranged in cooperation with the first limiting protrusions 131, that is, by the second limiting protrusions 214 abutting against the first limiting protrusions 131, the rotational limit of the security ring 13 is realized, and further the rotational limit of the upper cover 1 is realized, achieving the functions of anti-counterfeiting of the security ring 13 and improving the use safety.

[0044] In this embodiment, a third limiting protrusion 215 is provided at both ends of the inner wall of the straw 21 and located at the second internal thread 212. It cooperates with the fourth limiting protrusion 313 on the cutter body 31 for the up-and-down rotational limit of the cutter body 31 relative to the straw 21, having an anti-fooling effect, preventing the puncture inner cutter 3 from falling off the base 2 during multiple uses of the rotary puncture cap, playing an anti-detachment effect. There are two connecting flanges 22 and they are symmetrically arranged on both sides of the straw 21. The connecting flange 22 has a V-shaped structure, facilitating the sealing between the connecting flange 22 and the flexible packaging bag; a plurality of horizontally concave grooves 221 are provided on the two vertical side surfaces of each connecting flange 22, so that a multi-channel sealing structure is formed between the connecting flange 22 and the flexible packaging bag, improving the sealing performance.

[0045] In another solution of this embodiment, a cutting groove 321 is provided at the tip of the thorn 32. The cutting groove 321 is formed by cutting along the tapered half-plane of the thorn 32, playing a role in rotary cutting. When the thorn 32 rotates with the cutter body 31, the side cutting effect can be enhanced through the cutting groove 321, improving the cutting effect of the puncture inner cutter 3 on the sealing film.

[0046] Embodiment 2

[0047] As Figures 11-15 shown, different from Embodiment 1, in this embodiment, a plurality of spines 32 are provided at the lower end of the cutter body 31. The spines 32 are V-shaped structures with the tips facing downward. The plurality of spines 32 are arranged at intervals along the circumferential direction of the lower end surface of the cutter body 31. And by inserting the plurality of spines 32 into the sealing film of the flexible package bag, and as the cutter body 31 rotates, the sealing film is torn from multiple points, the tearing effect on the sealing film of the flexible package bag is good, and the liquid in the flexible package 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 plurality of spines 32 can be V-shaped structures with the same size and shape, or can be V-shaped structures with some of the same size or all different sizes but the same shape, or can be V-shaped structures with some of the same size or all different sizes and some of the same shape or all different shapes. The shape of the spines 32 can also be a V-shaped structure arranged obliquely, as long as it is ensured that the spines 32 can pierce the sealing film of the flexible package bag.

[0049] In the above embodiment, the usage process of the rotary 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 first, so that the anti-theft ring 13 is separated from the cap body 11. Then the cap body 11 rotates upward relative to the straw 21 of the base 2. Then the screwing structure 12 connected inside the cap body 11 drives the second dial plate 312 of the cutter body 31 of the puncture internal cutter 3 to rotate synchronously, so that the cutter body 31 moves downward relative to the straw 21, that is, the upper cap 1 rotates upward relative to the base 2, the puncture internal cutter 3 rotates downward relative to the base 2, and the spines 32 of the puncture internal cutter 3 pierce the sealing film in the flexible package bag. As the upper cap 1 continues to rotate, the screwing structure 12 is separated from the cutter body 31, the puncture internal cutter 3 remains stationary, and the upper cap 1 continues to move upward and then is separated from the base 2, that is, the upper cap 1 is unscrewed from the base 2. At this time, it is convenient to suck out or pour out the liquid in the flexible package bag through the straw 21.

[0050] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotary puncture cover for a soft bag, comprising an upper cover (1) and a base (2), characterized in that: The base (2) is provided with a puncture internal cutting knife (3); the upper cover (1) comprises a cover body (11); the inner wall of the cover body (11) is provided with a first internal 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 interior of the puncture internal cutting knife (3); the base (2) comprises a straw (21); the outer wall of the lower end of the straw (21) is provided with a connecting flange (22); the outer wall of the straw (21) is provided with a first external thread (211) screwed to the first internal thread (111); The inner wall of the straw (21) is provided with a second inner thread (212), and the rotation direction of the second inner thread (212) is opposite to the rotation direction of the first outer thread (211); the piercing inner cutter (3) comprises a cutter body (31), the cutter body (31) is a hollow cylindrical structure, the outer wall of which is provided with a second outer thread (311) screwed to the second inner thread (212), the lower end of the cutter body (31) is provided with a thorn (32), and the inner wall of the cutter body (31) is provided with a plurality of second shifting plates (312) cooperating with the screwing structure (12).

2. The rotary puncture cover for a soft bag according to claim 1, characterized in that: A thorn (32) is provided at the lower end of the cutter body (31), and the thorn (32) is a hollow cone structure. A plurality of liquid outlet holes (322) are provided on the side wall of the thorn (32), and the liquid outlet holes (322) are connected to the hollow cavity of the cutter body (31) through the hollow cavity of the thorn (32).

3. The rotary puncture cover for a soft bag according to claim 2, characterized in that: The tip of the thorn (32) is provided with a cutting groove (321), and the cutting groove (321) is cut and formed along the tapered half surface of the thorn (32).

4. The rotary puncture cover for a soft bag according to claim 1, characterized in that: The lower end of the cutter body (31) is provided with a plurality of spines (32), the spines (32) being a V-shaped structure with the tip pointing downward, and the plurality of spines (32) are arranged at intervals along the circumferential direction of the lower end surface of the cutter body (31).

5. A rotary puncture cover for a soft bag according to claim 2, 3 or 4, characterized in that: A plurality of fourth limiting protrusions (313) are provided at the upper end of the outer wall of the cutter body (31).

6. The rotary puncture cover for a soft bag according to claim 1, characterized in that: The screwing structure (12) comprises a vertical plate (121), wherein the vertical plate (121) is a rectangular vertical plate, and there are a plurality of vertical plates (121) which are arranged in a divergent manner with the central axis of the cover body (11) as a connection line, and each side of the vertical plate (121) away from the central axis of the cover body (11) is correspondingly connected to a first shifting plate (122).

7. The rotary puncture cover for a soft package bag according to claim 6, characterized in that: The number of the second shifting plates (312) is the same as the number of the vertical plates (121), and each of the second shifting plates (312) is correspondingly inserted between two vertical plates (121) and the first shifting plates (122) connected to the vertical plates (121).

8. The rotary puncture cover for a soft bag according to claim 1, characterized in that: A sealing ring (14) is provided on the inner side of the top of the cover body (11), and the sealing ring (14) is located on the outer side of the screw structure (12) and on the inner side of the straw (21). The lower end of the cover body (11) is connected to an anti-theft ring (13), and a plurality of first limiting protrusions (131) are provided on the inner side of the anti-theft ring (13).

9. The rotary puncture cover for a soft bag according to claim 8, characterized in that: A raised limiting ring (213) is provided at the lower end of the outer wall of the straw (21), and the limiting ring (213) is located above the connecting flange (22). A plurality of second limiting protrusions (214) are connected to the lower side of the limiting ring (213), and the second limiting protrusions (214) are arranged in cooperation with the first limiting protrusions (131).

10. The rotary puncture cover for a soft bag according to claim 1, characterized in that: A third limiting protrusion (215) is provided on the inner wall of the straw (21) and at both ends of the second internal thread (212); the connecting flanges (22) are two and symmetrically arranged on both sides of the straw (21); the connecting flanges (22) are V-shaped; and a plurality of horizontally concave grooves (221) are provided on the two vertical side surfaces of each connecting flange (22).

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