Automatic covering packaging bag

Abstract

The utility model provides an automatic covering packaging bag which comprises a box body and a cover body, the box body and the cover body are mutually communicated and connected, the cover body comprises an inner-layer cover body and an outer-layer cover body, the inner-layer cover body and the outer-layer cover body are mutually overlapped and mutually communicated, the outer-layer cover body is located on the outer side of the inner-layer cover body, and the outer-layer cover body is located on the outer side of the outer-layer cover body. The cover body is provided with a first heat-sealing unit group, a second heat-sealing unit group and a third heat-sealing unit group, the first heat-sealing unit group and the second heat-sealing unit group are formed on the inner-layer cover body, and the third heat-sealing unit group is formed on the outer-layer cover body; the inner-layer cover body is divided into a first cover body air bag by the first heat sealing unit set and the second heat sealing unit set, and the inner-layer cover body and the outer-layer cover body are divided into a second cover body air bag by the second heat sealing unit set and the third heat sealing unit set.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to an automatic sealing packaging bag. Background Art

[0002] In modern logistics and packaging, packaging bags, as a crucial packaging material, are widely used across various fields. With the continuous advancement of technology and rising demand for packaging quality, the development of new packaging bags has become a key industry priority. Currently, the market primarily features Q-shaped bags and L- or J-shaped bags. However, these existing packaging bags often lack automatic closing and often leave gaps.

[0003] Q-shaped bags are a common type of packaging bag, often shaped like the letter "Q." They offer considerable strength and durability, capable of withstanding certain weight and pressure. However, they also present significant challenges during use.

[0004] First, these bags cannot be automatically closed. After packaging, manual sealing is required, which not only increases packaging time and costs but also reduces production efficiency on some automated production lines. Furthermore, manual sealing is difficult to ensure, making it prone to leaks and compromised sealing. Second, these bags often leave gaps after closing. This is due to their design: the closing portion is typically folded or glued together, making it difficult to achieve a complete seal.

[0005] L-shaped and J-shaped bags are also common types of packaging bags, shaped like the letters "L" and "J," respectively. These two types of existing packaging bags offer advantages in certain areas. For example, when packaging items with unusual shapes, these bags can better adapt to the shape of the items, improving packaging efficiency and stability. However, these bags also suffer from the problem of not being able to automatically close and leaving gaps. Similar to Q-shaped bags, these bags require manual sealing after packaging the items and cannot be automatically closed. Furthermore, due to limitations in their design, gaps are prone to appearing after closing, compromising the sealing performance of the package.

[0006] Due to the inability of existing packaging bags to automatically close and the presence of gaps, they face certain limitations in practical applications. In the food, pharmaceutical, and electronic product packaging sectors, good sealing performance is crucial for ensuring the quality and safety of the packaged products. However, existing packaging bags fail to meet the stringent sealing requirements for food, pharmaceutical, and electronic product packaging. They also fail to effectively prevent the intrusion of static electricity and moisture, potentially damaging electronic products. Furthermore, electronic products typically require adequate protection during transportation and storage, and existing packaging bags also have shortcomings in this regard.

[0007] In summary, existing packaging bags all have the problem of not being able to automatically close and leaving gaps, which has brought many challenges to the packaging industry. To solve these problems, the development of an inflatable packaging bag that can automatically close and has good sealing performance has important practical significance and broad market prospects. Utility Model Content

[0008] A major advantage of the present invention is that it provides an automatic closing packaging bag, wherein the cover of the automatic closing packaging bag can automatically close on top of the box body when inflated, which is convenient to use.

[0009] Another advantage of the present invention is that it provides an automatic closing packaging bag, wherein when the automatic closing packaging bag is inflated, the cover and the box body are tightly fastened together, and the cover is not easily separated from the box body.

[0010] Another advantage of the present invention is that it provides an automatic closing packaging bag, wherein the cover of the automatic closing packaging bag includes an outer cover and an inner cover, the outer cover and the inner cover are stacked to form a double-layer structure, and the outer cover and the inner cover are connected to each other, which is beneficial to improving the sealing effect when closing.

[0011] Another advantage of the present invention is that it provides an automatic closing packaging bag, wherein the cover of the automatic closing packaging bag is provided with a heat sealing line, and the heat sealing line separates the cover into a first cover airbag and a second cover airbag, wherein when the packaging bag is inflated, the second cover airbag pulls the first cover airbag to flip over and snaps into the box opening of the box body, thereby realizing the automatic closing of the packaging bag.

[0012] Another advantage of the present invention is that it provides an automatic closing packaging bag, wherein the length of the first cover airbag of the cover of the automatic closing packaging bag is greater than the length of the second cover airbag, and after the packaging bag is inflated, the part where the first cover airbag is connected to the second cover airbag is flipped inward, so that the cover covers the box body inward.

[0013] Another advantage of the present invention is that it provides an automatic closing packaging bag, wherein the cover of the automatic closing packaging bag further includes a third cover airbag, and the third cover airbag is formed at the end of the first cover airbag to facilitate the inward flipping of the cover.

[0014] Another advantage of the present invention is that it provides an automatic closing packaging bag, wherein the automatic closing packaging bag does not require a complex structure and expensive manufacturing equipment. Therefore, the present application provides an economical and effective solution.

[0015] According to one aspect of the present invention, an automatic sealing packaging bag of the present invention that can achieve the aforementioned objects and other objects and advantages includes:

[0016] box body; and

[0017] A cover body, wherein the box body and the cover body are connected to each other, the cover body includes an inner cover body and an outer cover body, wherein the inner cover body and the outer cover body are overlapped with each other and are connected to each other, and the outer cover body is located on the outside of the inner cover body, the cover body is provided with a first heat sealing unit group, a second heat sealing unit group and a third heat sealing unit group, wherein the first heat sealing unit group and the second heat sealing unit group are formed on the inner cover body, the third heat sealing unit group is formed on the outer cover body, and the first heat sealing unit group and the second heat sealing unit group are separated into a first cover body airbag on the inner cover body, and the second heat sealing unit group and the third heat sealing unit group are separated into a second cover body airbag on the inner cover body and the outer cover body.

[0018] According to one embodiment of the present invention, the length of the first cover airbag is smaller than the length of the second cover airbag.

[0019] According to one embodiment of the present invention, the second cover airbag further includes an airbag outer layer segment, an airbag flip segment and an airbag inner layer segment, wherein the airbag outer layer segment of the second cover airbag is located at the outer layer cover, the airbag inner layer segment is located at the inner layer cover, and the airbag flip segment is located at the connecting part between the inner layer cover and the outer layer cover.

[0020] According to one embodiment of the present invention, the first heat sealing unit group, the second heat sealing unit group and the third heat sealing unit group formed on the cover are discontinuous heat sealing lines, partially continuous heat sealing sections or continuous heat sealing lines.

[0021] According to one embodiment of the present invention, when the second heat sealing unit group is a continuous heat sealing line or a partially continuous heat sealing section, the second heat sealing unit group completely separates the first cover airbag and the second cover airbag into a structure that is not connected to each other. At this time, the first cover airbag is a non-inflatable airbag structure, and the second cover airbag is an inflatable airbag structure.

[0022] According to one embodiment of the present invention, the second heat sealing unit group is an intermittent heat sealing line or heat sealing point, and the second heat sealing unit group separates the first cover airbag and the second cover airbag into an interconnected airbag structure. At this time, the first cover airbag and the second cover airbag are inflatable airbag structures.

[0023] According to one embodiment of the present invention, the first heat sealing unit group is formed at the bottom end of the inner cover body, and the second heat sealing unit group is formed at a position below the top end of the inner cover body.

[0024] According to one embodiment of the present invention, the cover further includes a third cover airbag, wherein the third cover airbag is formed on the outer cover, and the third cover airbag is located between the second cover airbag and the box side wall of the box.

[0025] According to an embodiment of the present invention, parts of the third cover airbag and the second cover airbag are located on the outer cover, and the sum of the lengths of the third cover airbag and the second cover airbag is greater than the length of the first cover airbag.

[0026] According to one embodiment of the present invention, the cover body is further provided with a fourth heat sealing unit group, wherein the fourth heat sealing unit group is formed between the second cover body airbag and the third cover body airbag, and the fourth heat sealing unit group separates the second cover body airbag and the third cover body airbag into an interconnected airbag structure.

[0027] According to one embodiment of the present invention, the automatic closing packaging bag includes at least two relatively stacked film layers, and the film layers are subjected to a series of heat seals to form the above-mentioned inflatable shell and the cover body, and the film layer is further provided with at least two transverse heat seal lines and at least two longitudinal heat seal lines, wherein the transverse heat seal lines are formed at the uppermost and lowermost ends of the film layer, and the longitudinal heat seal lines are formed at the leftmost and rearmost sides of the film layer, and the transverse heat seal lines and the longitudinal heat seal lines seal the film layer into an inflatable airbag structure.

[0028] Further objectives and advantages of the present invention will be fully reflected through understanding of the following description and drawings.

[0029] These and other objects, features and advantages of the present invention are fully reflected in the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an automatic sealing packaging bag according to the first preferred embodiment of the present utility model.

[0031] Figure 2 It is a structural schematic diagram of the automatic closing packaging bag in the uninflated state according to the first preferred embodiment of the utility model.

[0032] Figure 3A and Figure 3B These are the front view and rear view of the automatic closing packaging bag according to the first preferred embodiment of the present utility model.

[0033] Figure 4 It is a cross-sectional view of the automatic closing packaging bag according to the first preferred embodiment of the present invention. DETAILED DESCRIPTION

[0034] The following description is intended to disclose the present invention and enable those skilled in the art to implement the present invention. The preferred embodiments described below are provided for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0035] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0036] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0037] Refer to the accompanying drawings of this application specification Figures 1 to 4As shown, an automatic closing packaging bag according to the first preferred embodiment of the present application is explained in the following description. The automatic closing packaging bag includes a box body 10 and a cover body 20 that can be snapped onto the opening of the box body 10, wherein the box body 10 and the cover body 20 are interconnected and connected, and the automatic closing packaging bag has an uninflated state and an inflated state. When the automatic closing packaging bag is in the uninflated state, the box body 10 and the cover body 20 are in a film state and can be folded. When the automatic closing packaging bag is in the inflated state, the cover body 20 automatically closes the opening of the box body 10, so that the box body 10 is snapped or closed by the cover body 20.

[0038] Specifically, the automatic closing packaging bag has at least one inflation port 30, wherein the inflation port 30 is provided in the box body 10 and / or the cover body 20. Air is inflated from the inflation port 30 into the box body 10 and the cover body 20, so that the automatic closing packaging bag changes from the uninflated state to the inflated state. It is worth mentioning that the automatic closing packaging bag is small in size when in the uninflated state and can be folded for storage. When the automatic closing packaging bag is in the inflated state, the packaged items are placed in the storage space formed by the box body 10 and the cover body 20, and the box body 10 and the cover body 20 provide cushioning and protection for the packaged items inside.

[0039] The box body 10 includes a bottom 11 and a sidewall 12 extending upward from the bottom 11, wherein the sidewall 12 surrounds the bottom 11. The bottom 11 and the sidewall 12 form a storage space for accommodating the packaged object. The bottom 11 and the sidewall 12 of the box body 10 are in communication. When the box body 10 is inflated through the inflation port 30, the bottom 11 and the sidewall 12 of the box body 10 are inflated synchronously.

[0040] In this preferred embodiment of the present application, the opening of the box body 10 of the self-closing packaging bag can be triangular, quadrilateral, or other polygonal structures, and the corresponding cover 20 that can be closed on the box body 10 also has a triangular, quadrilateral, or other polygonal structure. When in the inflated state, the cover 20 covers or fits into the opening of the box body 10 to prevent the packaged items from escaping from the box body 10.

[0041] like Figure 1As shown, the box body side wall 12 of the box body 10 further includes a first side wall 121, a second side wall 122, a third side wall 123 and a fourth side wall 124, wherein the first side wall 121, the second side wall 122, the third side wall 123 and the fourth side wall 124 are sequentially connected to form a ring-shaped structure surrounding the top of the box body bottom 11. As an example, in this preferred embodiment of the present application, the box body 10 is a square structure, wherein the first side wall 121 is opposite to the third side wall 123, and the second side wall 122 is opposite to the fourth side wall 124.

[0042] The cover 20 is connected to the box side wall 12 , and air can be inflated from the cover 20 to the box side wall 12 and the box bottom 11 , or from the box side wall 12 to the cover 20 and the box bottom 11 .

[0043] In this preferred embodiment of the present application, the cover body 20 extends integrally from the top of the first side wall 121 of the box body side wall 12. When the automatic closing packaging bag is inflated, the cover body 20 flips from the top of the first side wall 121 of the box body side wall 12 toward the third side wall 123, and when inflation is completed, the cover body 20 covers the opening of the box body 10.

[0044] The lid 20 and the box body 10 are inflatable airbag structures. When the airbag structures are inflated, the lid 20 and the box body 10 form a three-dimensional packaging bag. Specifically, the lid 20 is a double-layer structure, comprising an inner lid 21 and an outer lid 22. The inner and outer lids 21 and 22 are stacked and interconnected, with the outer lid 22 located outside the inner lid 21. The stacking of the inner and outer lids 21 and 22 forms a double-layer airbag structure, which enhances the cushioning and protective effect of the lid 10 on the contents contained within.

[0045] As an example, in a specific example of the present application, one end of the outer cover 22 of the cover 20 extends integrally from the first side wall 121 of the box body side wall 12, and the other end of the outer cover 22 extends integrally from the inner cover 21, that is, the outer cover 22 is formed so as to be communicable between the inner cover 21 and the box body side wall 12. Alternatively, in another specific example of the present application, one end of the inner cover 21 of the cover 20 extends integrally from the first side wall 121 of the box body side wall 12, and the other end of the inner cover 21 extends integrally from the outer cover 22, that is, the inner cover 21 is formed so as to be communicable between the outer cover 22 and the box body side wall 12.

[0046] One end of the inner cover 21 of the cover 20 extends integrally from the outer cover 22 , and the other end of the inner cover 21 is fixed to the inner side of the box body 10 , so that the inner cover 21 and the outer cover 22 are stacked together inside and outside.

[0047] The self-closing packaging bag is provided with a plurality of heat-sealing units 40, wherein the heat-sealing units 40 are formed between the cover 20 and the box body 10, and between the box body 10 and the cover 20, and the inflatable airbag structure of the self-closing packaging bag is formed by the heat-sealing units 40. It is worth mentioning that the heat-sealing units 40 can be heat-sealing points, heat-sealing lines, heat-sealing sections, or heat-sealing blocks.

[0048] Specifically, if Figure 3A and Figure 3B As shown, in this preferred embodiment of the present application, the cover body 20 is provided with a first heat sealing unit group 41, a second heat sealing unit group 42 and a third heat sealing unit group 43, wherein the first heat sealing unit group 41 and the second heat sealing unit group 42 are formed on the inner layer cover body 21, and the third heat sealing unit group 43 is formed on the outer layer cover body 22, and the first heat sealing unit group 41 and the second heat sealing unit group 42 are separated on the inner layer cover body 21 to form a first cover body airbag 23, and the second heat sealing unit group 42 and the third heat sealing unit group 43 are separated on the inner layer cover body 21 to form a first cover body airbag 23. The inner cover body 21 and the outer cover body 22 are separated into a second cover body airbag 24, wherein the length of the first cover body airbag 23 is smaller than the length of the second cover body airbag 24, so that when the automatic closing packaging bag is inflated, the first cover body airbag 23 can pull the second cover body airbag 24 to move toward the box body 10, that is, the force after the first cover body airbag 23 is inflated can drive the second cover body airbag 24 to flip toward the box body 10, thereby making the cover body 20 automatically close on the opening of the box body 10.

[0049] It is worth mentioning that the first cover airbag 23 is formed on the inner cover 21, and the second cover airbag 24 is formed on the inner cover 21 and the outer cover 22. When the automatic closing packaging bag is inflated, the part of the second cover airbag 24 located on the inner cover 21 is connected to the first cover airbag 23, and this part faces the box body, which has the function of pulling it to flip inward.

[0050] The second cover airbag 24 further includes an airbag outer layer segment 241, an airbag inversion segment 242, and an airbag inner layer segment 243. The airbag outer layer segment 241 of the second cover airbag 24 is located on the outer cover 22, the airbag inner layer segment 243 is located on the inner cover 21, and the airbag inversion segment 242 is located at the connection between the inner cover 21 and the outer cover 22. In short, in this preferred embodiment of the present application, the second cover airbag 24 is in a "J" or "L" shape.

[0051] The first heat sealing unit group 41 , the second heat sealing unit group 42 and the third heat sealing unit group 43 formed on the cover body 20 may be discontinuous heat sealing lines, partially continuous heat sealing sections or continuous heat sealing lines.

[0052] The first cover airbag 23 of the cover 20 can be an inflatable airbag structure or a non-inflatable airbag structure. For example, when the second heat-sealing unit group 42 is a continuous heat-sealing line or a partially continuous heat-sealing section, the second heat-sealing unit group 42 completely separates the first cover airbag 23 from the second cover airbag 24 into a mutually disconnected structure. In this case, the first cover airbag 23 is a non-inflatable airbag structure, and the second cover airbag 24 is an inflatable airbag structure. In other words, the inside of the first cover airbag 23 is flat. When the cover 20 is automatically closed on the box body 10, the first cover airbag 23 of the cover 20 and the article can fit flatly, so that the interior of the first cover airbag 23 forms a complete square space structure.

[0053] Alternatively, in another embodiment of the present application, the first cover airbag 23 and the second cover airbag 24 of the cover body 20 are interconnected, inflatable airbag structures. That is, the second heat-sealing unit group 42 is a discontinuous heat-sealing line or point, separating the first cover airbag 23 and the second cover airbag 23 into an interconnected airbag structure. In this case, the first cover airbag 23 and the second cover airbag 24 are inflatable airbag structures. That is, when inflated, the first cover airbag 23 and the second cover airbag 24 each form an air column structure, i.e., the first cover airbag 23 and the second cover airbag 24 bulge. During automatic closing, the first cover airbag 23 occupies a portion of the interior space of the box body 10. This configuration is suitable for packaging with irregular or small items. This also allows the items in the inner cavity to fit closely to the cover, preventing space between the items to be packaged and the automatically closed packaging bag.

[0054] The first heat sealing unit group 41 is formed at the bottom end of the inner cover 21, and the second heat sealing unit group 42 is formed at a position below the top end of the inner cover 21, that is, the second heat sealing unit group 42 is a certain distance away from the top end of the inner cover 21. The third heat sealing unit group 43 is formed at the bottom end of the outer cover 22 or at a position above the bottom end.

[0055] like Figure 3A and Figure 3B As shown, the cover 20 further includes a third cover airbag 25 , wherein the third cover airbag 25 is formed on the outer cover 22 , and the third cover airbag 25 is located between the second cover airbag 24 and the box side wall 12 of the box 10 .

[0056] Part of the third cover airbag 25 and the second cover airbag 24 are located on the outer cover 22, and the sum of the lengths of the third cover airbag 25 and the second cover airbag 24 is greater than the length of the first cover airbag 23, so that when the automatic closing packaging bag is inflated, the first cover airbag 23 can pull the second cover airbag 24 to rotate, wherein the third cover airbag 25 is located on the outside of the first cover airbag 23 and the bottom of the second cover airbag 24, allowing the first cover airbag 23 and the second cover airbag 24 to have a larger rotation amplitude, thereby avoiding the second airbag 24 from generating a reverse force.

[0057] The cover 20 is further provided with a fourth heat-sealing unit group 44, wherein the fourth heat-sealing unit group 44 is formed between the second cover airbag 24 and the third cover airbag 25. The fourth heat-sealing unit group 44 separates the second cover airbag 24 and the third cover airbag 25 into an interconnected airbag structure. Preferably, in this preferred embodiment of the present application, the length of the third cover airbag 25 is less than the length of the first cover airbag 23, and the length of the third cover airbag 25 is less than the length of the second cover airbag 24.

[0058] It is worth mentioning that the length between the first heat sealing unit group 41 and the second heat sealing unit group 42 is the length of the first cover airbag 23, the length along the bag body between the second heat sealing unit group 42 and the third heat sealing unit group 43 is the length of the second cover airbag 24, and the length between the third heat sealing unit group 43 and the fourth heat sealing unit group 44 is the length of the third cover airbag 25.

[0059] Preferably, in this preferred embodiment of the present application, the first cover airbag 23, the second cover airbag 24 and the third cover airbag 25 form the three sides of an inflatable triangle. When not inflated, the three sides of the triangle cannot be formed. When inflated, the first cover airbag 23, the second cover airbag 24 and the third cover airbag 25 form the three sides of a triangle, and the first cover airbag 23 pulls the second cover airbag 24 to flip over. The inflated third cover airbag 25 allows the second cover airbag 24 to flip toward the opening direction of the box body 10 without returning.

[0060] like Figure 4 As shown, the automatic closing packaging bag includes at least two relatively stacked film layers 50, and the film layers 50 are subjected to a series of heat seals to form the above-mentioned inflatable shell 10 and the cover body 20. The film layer 50 is further provided with at least two transverse heat seal lines 45 and at least two longitudinal heat seal lines 46, wherein the transverse heat seal lines 45 are formed at the uppermost and lowermost ends of the film layer 50, and the longitudinal heat seal lines 46 are formed at the leftmost and rearmost sides of the film layer 50. The transverse heat seal lines 45 and the longitudinal heat seal lines 46 seal the film layer 50 into an inflatable airbag structure.

[0061] The film layer 50 is further provided with a series of air column heat sealing lines 47, wherein the air column heat sealing lines 47 are formed between the transverse heat sealing lines 45 and the longitudinal heat sealing lines 46, and the longitudinal heat sealing lines 46 separate the airbags into a series of air column units 510, and two adjacent air column units 510 are separated by the air column heat sealing lines 47 and are not connected.

[0062] As an example, in a specific example of the present application, the air column heat sealing lines 47 are arranged in the longitudinal direction, that is, two adjacent air column heat sealing lines 47 are spaced apart to form an air column unit extending in the longitudinal direction.

[0063] The air column heat seal line 47 is formed on the cover body 20 , and the air column heat seal line 47 separates the first cover body airbag 23 and the second cover body airbag 24 of the cover body 20 into a plurality of air column units.

[0064] Preferably, in a specific example of the present application, the air column heat sealing line 47 is evenly formed on the first cover airbag 23 and the second cover airbag 24, and the air column units formed by the air column heat sealing line 47 in the first cover airbag 23 and the second cover airbag 24 have the same width.

[0065] As an example, in another optional embodiment of the present application, the air column heat seal line 47 is formed on the second cover airbag 24 of the cover body 20, and the air column heat seal line 47 divides the second cover airbag 24 into multiple air column units. Unlike the above preferred embodiment, the air column heat seal line is not formed on the first cover airbag 23. Therefore, the first cover airbag 23 is a connected large airbag structure, while the second cover airbag 24 is separated into multiple air column units by the air column heat seal line 47. When inflated, the first cover airbag 23 of the cover body 20 is embedded in the box body 10, serving as a structure that fills the box body 10.

[0066] Alternatively, in another optional embodiment of the present application, the air column heat seal line 47 is uniformly formed on the second cover airbag 24 of the cover body 20, and the air column heat seal line 47 is formed on a portion of the first cover airbag 23, such as the left side, right side, or middle position of the first cover airbag 23. Therefore, the air column units spaced apart from each other can be formed at the positions corresponding to the air column heat seal lines 47, while the air column units are not formed at the positions without the air column heat seal lines 47.

[0067] The film layer 50 is further provided with a plurality of bending heat sealing units 48 , and the bending heat sealing units 48 are formed in the air column units 510 of the box body 10 . The air column units 510 can be bent along the bending heat sealing lines 48 to form the structure of the box body 10 .

[0068] The self-sealing packaging bag further includes an inflation valve 60, wherein the inflation valve 60 is disposed between the two film layers 50 and forms an inflation channel between the film layers 50, through which gas is injected into the airbag. Preferably, in this preferred embodiment of the present application, the inflation valve 60 is a one-way inflation valve.

[0069] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are provided for illustrative purposes only and are not intended to limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. Automatically cover the packaging bag, characterized in that: include: Box body; and A cover body, wherein the box body and the cover body are connected to each other, the cover body includes an inner cover body and an outer cover body, wherein the inner cover body and the outer cover body are overlapped with each other and are connected to each other, and the outer cover body is located on the outside of the inner cover body, the cover body is provided with a first heat sealing unit group, a second heat sealing unit group and a third heat sealing unit group, wherein the first heat sealing unit group and the second heat sealing unit group are formed on the inner cover body, the third heat sealing unit group is formed on the outer cover body, and the first heat sealing unit group and the second heat sealing unit group are separated into a first cover body airbag on the inner cover body, and the second heat sealing unit group and the third heat sealing unit group are separated into a second cover body airbag on the inner cover body and the outer cover body. 2 . The automatic closing packaging bag according to claim 1 , wherein the length of the first cover airbag is smaller than the length of the second cover airbag.

3. The automatic closing packaging bag according to claim 2, wherein the second cover airbag further includes an airbag outer layer section, an airbag flip section and an airbag inner layer section, wherein the airbag outer layer section of the second cover airbag is located at the outer layer cover, the airbag inner layer section is located at the inner layer cover, and the airbag flip section is located at the connecting part between the inner layer cover and the outer layer cover.

4. The automatic closing packaging bag according to claim 3, wherein the first heat sealing unit group, the second heat sealing unit group and the third heat sealing unit group formed on the cover are discontinuous heat sealing lines, partially continuous heat sealing sections or continuous heat sealing lines.

5. The automatic sealing packaging bag according to claim 4, wherein when the second heat-sealing unit group is a continuous heat-sealing line or a partially continuous heat-sealing section, the second heat-sealing unit group completely separates the first cover airbag and the second cover airbag into a structure that is not connected to each other. At this time, the first cover airbag is a non-inflatable airbag structure, and the second cover airbag is an inflatable airbag structure.

6. The automatic sealing packaging bag according to claim 4, wherein the second heat sealing unit group is an intermittent heat sealing line or heat sealing point, and the second heat sealing unit group separates the first cover airbag and the second cover airbag into an interconnected airbag structure, and at this time, the first cover airbag and the second cover airbag are inflatable airbag structures.

7. The automatic closing packaging bag according to claim 5 or 6, wherein the first heat sealing unit group is formed at the bottom end of the inner cover body, and the second heat sealing unit group is formed at a position below the top end of the inner cover body.

8. The automatic closing packaging bag according to claim 7, wherein the cover further comprises a third cover airbag, wherein the third cover airbag is formed on the outer cover, and the third cover airbag is located between the second cover airbag and the box side wall of the box.

9. The automatic closing packaging bag according to claim 8, wherein parts of the third cover airbag and the second cover airbag are located on the outer cover, and the sum of the lengths of the third cover airbag and the second cover airbag is greater than the length of the first cover airbag.

10. The automatic closing packaging bag according to claim 9, wherein the cover body is further provided with a fourth heat sealing unit group, wherein the fourth heat sealing unit group is formed between the second cover body airbag and the third cover body airbag, and the fourth heat sealing unit group separates the second cover body airbag and the third cover body airbag into an interconnected airbag structure.

11. The automatic closing packaging bag according to claim 1, wherein the automatic closing packaging bag comprises at least two relatively stacked film layers, wherein the film layers are subjected to a series of heat seals to form an inflatable shell and the cover body, and the film layer is further provided with at least two transverse heat seal lines and at least two longitudinal heat seal lines, wherein the transverse heat seal lines are formed at the uppermost and lowermost ends of the film layer, and the longitudinal heat seal lines are formed at the leftmost and rearmost sides of the film layer, and the transverse heat seal lines and the longitudinal heat seal lines seal the film layer into an inflatable airbag structure.

12. The automatic closing packaging bag according to claim 11, wherein the film layer is further provided with a series of air column heat seal lines, wherein the air column heat seal lines are formed between the transverse heat seal lines and the longitudinal heat seal lines, and the longitudinal heat seal lines separate the air bags into a series of air column units, wherein the air column heat seal lines are evenly formed on the first cover air bag and the second cover air bag; or the air column heat seal lines are formed on the second cover air bag of the cover; the air column heat seal lines are formed on a partial area of ​​the first cover air bag.

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