Limiting air column bag

Abstract

The invention provides a limiting air column bag. The limiting air column bag comprises a bottom bag body, a first side bag body, a second side bag body and at least one limiting bag body, wherein the first side bag body integrally extends upwards from one end of the bottom bag body; the second side bag body integrally extends upwards from the other end of the bottom bag body; the first side bag body and the second side bag body are partially sealed, and the first side bag body and the second side bag body jointly define a containing cavity with the bottom bag body. The limiting bag body is integrally formed on the first side bag body and / or the second side bag body and can be switched between a protruding position and a limiting position, and when the limiting bag body is located at the limiting position, the limiting bag body is concave towards the containing cavity and can be embedded into the groove of the packaged object to limit movement of the packaged object.

Description

Technical Field

[0001] This invention relates to the field of packaging technology, and more particularly to a limiting air column bag. Background Technology

[0002] Currently, air column bags are commonly used as cushioning packaging materials during the transportation and storage of goods to reduce damage caused by external impacts. A typical air column bag usually has a structure with multiple parallel air columns forming an internal cavity. After the item is placed inside this cavity, inflation causes the air columns to expand, enveloping and cushioning the item. However, these traditional air column bags still have the following shortcomings in practical use: Because their internal cavity is usually of a regular shape, for irregularly shaped items or items requiring precise fixation, especially valuable, fragile, or precision products, simply filling the bag with excess air column material or simply stuffing in filler is insufficient to achieve accurate positioning and securing. Items may still have considerable room to move within the cavity, leading to shaking and collisions during handling or transportation, thus increasing the risk of damage.

[0003] Therefore, while existing air column bag structures provide effective cushioning, they often fail to ensure stable positioning of items, especially limiting their effectiveness in packaging scenarios with high positioning requirements. It is necessary to provide an improved packaging bag structure that, while providing air cushioning, can also adapt to the shape of the item and securely engage, thereby improving the protective and reliable nature of the packaging. Summary of the Invention

[0004] A key advantage of this invention is that it provides a limiting air column bag, which addresses the shortcomings of traditional air column bags that cannot accurately limit the position of valuable, fragile or delicate items, causing the items to shake and collide within the cavity. This invention provides an air column bag with a switchable position limiting bag body, which can achieve stable locking and positioning of items and reduce the risk of damage.

[0005] A key advantage of this invention is that it provides a limiting air column bag, which allows for flexible adjustment of the limiting bag body between a protruding position and a limiting position. The protruding position facilitates the placement of items into the receiving cavity, while the limiting position is recessed into the cavity and fits the groove of the item, thus balancing ease of operation and reliable limiting.

[0006] A key advantage of this invention is that it provides a limiting air column bag, which ensures the integrity of the bag structure and sealing performance through the integrated design of the limiting bag body and the side bag body. At the same time, it uses multiple sets of interconnected limiting bag body units to form a U-shaped limiting groove, which improves the compatibility with the groove of the item.

[0007] A key advantage of this invention is that it provides a limiting air column bag, optimizes the side bag structure, and achieves thinning of the limiting side bag through the heat sealing line of the side bag, reducing the steps of stuffing items and improving packaging operation efficiency.

[0008] A key advantage of this invention is that it provides a limiting air column bag, which, with the help of the air column gap design, assists in switching the position of the limiting bag body, simplifies the adjustment operation, and reduces the difficulty of use;

[0009] A major advantage of this invention is that it provides a limiting air column bag that integrates inflation cushioning and precise limiting functions. While ensuring the original cushioning and protection effect of the air column bag, it enhances the positioning performance and is suitable for various packaged items with irregular shapes or grooves.

[0010] A key advantage of this invention is that it provides a limiting air column bag, which, through the reasonable arrangement of spaced heat-sealing lines, precisely divides the limiting bag body units, ensuring the stability and molding accuracy of the limiting structure;

[0011] A key advantage of this invention is that it provides a limiting air column bag, which allows for flexible adaptation of the number and position of the limiting bags to the grooves of the packaged items, thus expanding the applicability of the air column bag and meeting the packaging needs in different scenarios.

[0012] A key advantage of this invention is that it provides a limiting air column bag that balances the lightweight and portable nature of the air column bag when it is not inflated with the structural stability after it is inflated, making it easy to store and transport, while improving the overall protection and reliability of the packaging.

[0013] A key advantage of this invention is that it provides a limiting air column bag, which, through the matching design of the bag cap and the inflation valve, improves the sealing function and inflation operation of the air column bag, forming a complete and comprehensive limiting packaging solution.

[0014] According to one aspect of the present invention, a limiting air column bag of the present invention, which can achieve the aforementioned and other objects and advantages, includes a bottom bag body, a first side bag body integrally extending upward from one end of the bottom bag body, a second side bag body integrally extending upward from the other end of the bottom bag body, and at least one limiting bag body; the first side bag body and the second side bag body are partially sealed, together forming a receiving cavity with the bottom bag body; the limiting bag body is integrally formed on the first side bag body and / or the second side bag body, and can switch between a protruding position and a limiting position. When in the limiting position, it is concave towards the receiving cavity and can be embedded in the groove of the packaged item to restrict the movement of the packaged item.

[0015] According to one embodiment of this application, the limiting bag is selectively disposed at the upper end, lower end, or middle position between the upper and lower ends of the first side bag, and its disposed position corresponds to the groove position of the packaged item.

[0016] According to one embodiment of this application, the number of the limiting bag bodies is one, two or more, and the number is not greater than the number of grooves on the packaged item.

[0017] According to one embodiment of this application, the limiting bag body includes three or more limiting bag body units connected in sequence, and each limiting bag body unit is arranged along the air column direction of the corresponding side bag body.

[0018] According to one embodiment of this application, the limiting bag unit includes a first limiting bag unit, a second limiting bag unit, a third limiting bag unit, a fourth limiting bag unit, and a fifth limiting bag unit connected and communicated in sequence. The first limiting bag unit is communicated with the first side upper bag body, and the fifth limiting bag unit is communicated with the first side lower bag body.

[0019] According to one embodiment of this application, it further includes multiple spacer heat-sealing lines formed on the first side bag and / or the second side bag, for separating the forming of the limiting bag unit.

[0020] According to one embodiment of this application, the limiting bag body includes a limiting main bag body and limiting side bags extending outward from both sides of the limiting main bag body. The limiting side bags are provided with side bag heat sealing lines and are thinner than the limiting main bag body.

[0021] According to one embodiment of this application, at least one air column gap is provided between the first side bag and the second side bag, and the air column gap is used for the user to adjust the limiting bag to switch between a protruding position and a limiting position.

[0022] According to one embodiment of this application, when in the limiting position, the first to fifth limiting bag units surround and form a U-shaped limiting groove with the opening facing outward and recessed into the receiving cavity, for fitting and engaging with the groove of the packaged item.

[0023] According to one embodiment of this application, the first side pocket includes a front pocket, a first side pocket, and a second side pocket, and the limiting pocket extends from the front pocket to the first side pocket and the second side pocket.

[0024] According to one embodiment of this application, a bag cover is also included, which is connected to the first side bag and / or the second side bag for closing the receiving cavity.

[0025] A packaging method using a limiting air column bag as described in any of the preceding claims includes the following steps: a) inflating the limiting air column bag; b) adjusting the limiting bag body to the protruding position; c) placing the packaged item into the receiving cavity; d) adjusting the limiting bag body to the limiting position, such that the limiting bag body or the U-shaped limiting groove is embedded in the groove of the packaged item.

[0026] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings.

[0027] These and other objects, features and advantages of the present invention will become fully apparent from the following detailed description and accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a limiting air column bag according to a first preferred embodiment of the present invention.

[0029] Figure 2A This is a schematic diagram of the usage state of the limiting air column bag according to the first preferred embodiment of the present invention, showing the state of the packaged item before it is limited.

[0030] Figure 2B This is a schematic diagram of the usage state of the limiting air column bag according to the first preferred embodiment of the present invention, which shows the state in which the packaged item is limited.

[0031] Figure 3 is a perspective cross-sectional view of the limiting air column bag according to the first preferred embodiment of the present invention.

[0032] Figure 4 This is a detailed schematic diagram of the groove portion of the limiting air column bag according to the first preferred embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the overall structure of the limiting air column bag according to another preferred embodiment of the present invention. Detailed Implementation

[0034] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0035] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

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

[0037] Refer to the accompanying drawings in this application specification. Figures 1 to 4 As shown, a limiting air column bag according to a first preferred embodiment of this application is described below, wherein the limiting air column bag includes a bottom bag body 10, a first side bag body 20 integrally extending from one end of the bottom bag body 10 upward, a second side bag body 30 integrally extending from the other end of the bottom bag body 10 upward, and at least one limiting bag body 40, wherein the limiting bag body 40 is integrally formed with the first side bag body 20 and / or the second side bag body 30, wherein at least a portion of the structure of the first side bag body 20 and the second side bag body 30 is sealed, and the bottom bag body 10, the first side bag body 20 and the second side bag body 30 together form a receiving cavity 101 for receiving the packaged item.

[0038] It is worth mentioning that, in this preferred embodiment of the present application, the packaged item or the item to be packaged has at least one groove 100, wherein the groove 100 is formed on the front or back of the packaged item, and during packaging, the opening of the groove 100 faces the first side bag 20 or the second side bag 30.

[0039] The limiting bag 40 can be recessed into the receiving cavity 101 from the first side bag 20 and / or the second side bag 30, or protrude outward from the first side bag 20 and / or the second side bag 30. When the limiting bag 40 protrudes outward from the inside, the packaged item can be placed into the receiving cavity 101, and the position of the packaged item can be adjusted as needed, that is, the position of the groove 100 of the packaged item can be adjusted to correspond with the position of the limiting bag 40. When the limiting bag 40 is recessed inward from the outside, the limiting bag 40 can be embedded in the groove 100 of the packaged item to form a limiting structure to prevent the packaged item from moving in the receiving cavity 101.

[0040] Therefore, in this preferred embodiment of the present application, the limiting bag 40 can be adjusted to switch between a protruding position and a limiting position. When the limiting bag 40 is in the protruding position, the limiting bag 40 protrudes outside the receiving cavity 101, and the packaged item can be placed into the receiving cavity 101. When the limiting bag 40 is in the limiting position, the limiting bag 40 is recessed into the receiving cavity 101, and the limiting bag 40 cooperates with the groove of the packaged item to restrict the movement of the packaged item in the receiving cavity 101.

[0041] As an example, in one specific embodiment of this application, the limiting bag 40 is disposed on the first side bag 20. Optionally, in another alternative embodiment of this application, the limiting bag 40 is disposed on the second side bag 30. Preferably, in this preferred embodiment of this application, the limiting bag 40 and the first side bag 20 are an integral structure, that is, the limiting bag 40 extends integrally from the first side bag 20.

[0042] It is understood that in this preferred embodiment of the present application, the number of the limiting bag body 40 may be one, two or more, and the specific number of the limiting bag body 40 depends on the number of the grooves of the packaged item, which is not limited in this application.

[0043] The limiting bag 40 is disposed at the upper end, lower end, and midway between the upper and lower ends of the first side bag 20. It is understood that the specific positions of the limiting bag 40 correspond to the positions of the grooves 100 of the packaged item, and the number of limiting bags 40 is the same as the number of grooves 100 of the packaged item, and may not exceed the number of grooves.

[0044] The first side pocket 20 further includes a first upper side pocket 21 and a first lower side pocket 22, wherein the first upper side pocket 41 is located above the first lower side pocket 22, wherein a limiting pocket 40 is disposed between the first upper side pocket 21 and the first lower side pocket 22, and the limiting pocket 40 connects and communicates the first upper side pocket 21 and the first lower side pocket 22.

[0045] Specifically, in one specific embodiment of this application, the limiting bag 40 further includes three or more limiting bag units 41, wherein the three or more limiting bag units 41 are sequentially connected to each other and are arranged sequentially along the air column direction of the first side bag 20.

[0046] In a specific embodiment of this application, the limiting bag unit 41 of the limiting bag body 40 further includes a first limiting bag unit 411, a second limiting bag unit 412, a third limiting bag unit 413, a fourth limiting bag unit 414, and a fifth limiting bag unit 415. The first limiting bag unit 411, the second limiting bag unit 412, the third limiting bag unit 413, the fourth limiting bag unit 414, and the fifth limiting bag unit 415 are sequentially connected and interconnected. The first limiting bag unit 411 is connected and interconnected with the first side upper bag body 21, and the fifth limiting bag unit 415 is connected and interconnected with the first side lower bag body 22. The second limiting bag unit 412, the third limiting bag unit 413, and the fourth limiting bag unit 414 are sequentially connected between the first limiting bag unit 411 and the fifth limiting bag unit 415.

[0047] It is worth mentioning that, in this preferred embodiment of the present application, each limiting bag unit of the limiting bag body 40 is composed of a series of mutually spaced air columns.

[0048] When the limiting bag 40 is in the protruding position, the second limiting bag unit 412 and the fourth limiting bag unit 414, which are connected to the third limiting bag unit 413, are opposite to each other, the first limiting bag unit 411 is opposite to the fifth limiting bag unit 415, and the third limiting bag unit 413 protrudes outside the receiving cavity to facilitate the placement of the packaged item into the receiving cavity. When the limiting bag 40 is in the limiting position, the second limiting bag unit 412 and the fourth limiting bag unit 414 connected to the third limiting bag unit 413 are opposite to each other, and the first limiting bag unit 411 is opposite to the fifth limiting bag unit 415. The third limiting bag unit 413 protrudes outward from the outside of the receiving cavity, and a U-shaped limiting groove 102 with an outward opening is formed between the second limiting bag unit 412 and the fourth limiting bag unit 414, and between the first limiting bag unit 411 and the fifth limiting bag unit 415. It can be understood that the limiting groove 102 is a structure that is concave from the outside into the receiving cavity, and the limiting groove 102 is formed by the first limiting bag unit 411, the second limiting bag unit 412, the third limiting bag unit 413, the fourth limiting bag unit 414, and the fifth limiting bag unit 415 connected in sequence. At least a portion of the structure of the limiting bag 40 can be embedded into the groove 100 of the packaged item, such that the limiting bag 40 and the packaged item form an interfering structure, thereby preventing the packaged item from moving or rotating in the receiving cavity of the packaging bag.

[0049] The limiting air column bag is provided with multiple spaced-apart heat-sealing lines 50, wherein the spaced-apart heat-sealing lines 50 are formed on the first side bag body 20 and / or the second side bag body 30, for forming the first limiting bag body unit 411, the second limiting bag body unit 412, the third limiting bag body unit 413, the fourth limiting bag body unit 414 and the fifth limiting bag body unit 415 of the limiting bag body unit 41.

[0050] Specifically, the spacer heat-sealing line 50 further includes a first spacer heat-sealing line 51, a second spacer heat-sealing line 52, a third spacer heat-sealing line 53, a fourth spacer heat-sealing line 54, a fifth spacer heat-sealing line 55, and a sixth spacer heat-sealing line 56, wherein the first spacer heat-sealing line 51 and the second spacer heat-sealing line 52 form a first limiting bag unit 411; the third spacer heat-sealing line 53 and the second spacer heat-sealing line 52 form a second limiting bag unit 412; the third spacer heat-sealing line 53 and the fourth spacer heat-sealing line 54 form a third limiting bag unit 413; the fifth spacer heat-sealing line 55 and the fourth spacer heat-sealing line 54 form a fourth limiting bag unit 414; and the fifth spacer heat-sealing line 55 and the sixth spacer heat-sealing line 56 form a fifth limiting bag unit 415.

[0051] It is worth mentioning that, in this preferred embodiment of the present application, the first heat-sealing line 51, the second heat-sealing line 52, the third heat-sealing line 53, the fourth heat-sealing line 54, the fifth heat-sealing line 55, and the sixth heat-sealing line 56 can be parallel heat-sealing lines.

[0052] like Figure 1 As shown, the limiting air column bag is implemented as a hollow cubic or rectangular bag structure. The first side bag 20 and the second side bag 30, which extend integrally from the bottom bag 10, are heat-sealed to form the cubic or rectangular bag structure. Therefore, in a specific embodiment of this application, the side ends of the first side bag 20 and / or the second side bag 30 are bent and then heat-sealed to form a hollow bag structure.

[0053] As an example, in one specific embodiment of this application, the two ends of the first side bag 20 are bent towards the second side bag 30 and connected to it, forming a closed packaging bag structure. Optionally, in another specific embodiment of this application, the two ends of the second side bag 30 are bent towards the first side bag 20 and connected to it, forming a closed packaging bag structure. Optionally, in another alternative embodiment of the application, the two ends or one end of the first side bag 20 and the second side bag 30 are bent and connected to each other, thereby forming a closed packaging bag structure.

[0054] As shown in FIG3, in this preferred embodiment of the present application, the first side pocket 20 further includes a front pocket 23 and a first side pocket 24 and a second side pocket 25 extending from the end of the front pocket 23 toward the second side pocket 30, wherein the first side pocket 24 and the second side pocket 25 are respectively connected to the second side pocket 30.

[0055] In this preferred embodiment of the present application, the limiting bag 40 extends from the front bag 23 of the first side bag 20 to the first side bag 24 and the second side bag 25. The limiting bag 40 further includes a limiting main bag 42 and limiting side bags 43 extending outward from both sides of the limiting main bag 42, wherein the limiting main bag 42 is disposed on the front bag 23 of the first side bag 20, and the limiting side bags 43 are disposed on the first side bag 24 and the second side bag 25 of the first side bag 20.

[0056] The limiting air column bag is further provided with a side bag heat seal line 60, wherein the side bag heat seal line 60 is formed on the limiting side bag 43 of the limiting bag body 40, so that the thickness of the limiting side bag 43 is thinner than the thickness of the inner main bag body 42, so as to allow for insertion.

[0057] like Figure 1 As shown, the limiting air column bag further has at least one air column slit 103, wherein the air column slit 103 is formed between the first side bag 20 and the second side bag 30, facilitating adjustment of the position of the limiting bag 40 during use. Simply put, the limiting bag 40 can be switched between a protruding position and a limiting position via the air column slit 103. When the packaged item is wrapped in the limiting air column bag, i.e., the limiting air column bag is in an inflated state, the user can adjust the position of the limiting bag 40 through the air column slit 103 to remove the packaged item from the limiting air column bag.

[0058] It is worth mentioning that the air column gap 103 is formed between the first side bag 20 and the second side bag 30, and its position corresponds to the limiting bag 40. That is, when the limiting air column bag is in an inflated state, the limiting bag 40 protrudes outward. The air column gap 103 forms a gap hole connecting the receiving cavity 101 between the first side bag 20, the second side bag 30 and the limiting bag 40. This gap hole allows the user to adjust the position and shape of the limiting bag 40, that is, to adjust the limiting bag 40 to switch between the protruding position and the limiting position.

[0059] In this preferred embodiment of the present application, the limiting bag body is further provided with at least two bag body sealing lines 104, wherein the bag body sealing lines 104 are formed at both ends of the air column gap 103, and the bag body sealing lines 104 are used to connect and seal the first side bag body 20 and the second side bag body 30.

[0060] Refer to the accompanying drawings in this application specification. Figure 5 This application illustrates another optional embodiment of the limiting bag body described herein. The difference between this application and the preferred embodiment described above is that the two ends of the first side bag 20 and the second side bag 30 are sealed together. That is, in this application, the limiting air column bag no longer has the air column gap 103.

[0061] The limiting air column bag further includes a bag cover 70, wherein the bag cover 70 is disposed on the top of the first side bag 20 and / or the second side bag 30, and the bag cover 70 is operable to close the opening of the receiving cavity 101 to close the receiving cavity 101.

[0062] In one specific embodiment of this application, the bag cover 70 extends integrally from the second side bag 30, that is, the bag cover 70 and the second side bag 30 are an integral structure.

[0063] The limiting air column bag is a packaging bag structure formed by heat sealing and bending of at least two sides of air column film. In this preferred embodiment of the application, the limiting air column bag further includes a first air column film 110 and a second air column film 120, wherein the first air column film 110 and the second air column film 120 are disposed opposite to each other, and the limiting air column bag is further provided with a series of heat sealing structures 130, wherein the heat sealing structures are formed on the first air column film 110 and the second air column film 120, and a gas storage chamber for containing gas is formed between the first air column film 110 and the second air column film 120.

[0064] The heat-sealing structure 130 of the limiting air column bag further includes a transverse heat-sealing line and a longitudinal heat-sealing line, wherein the transverse heat-sealing line is arranged transversely at the upper and lower ends of the first air column film 110 and the second air column film 120, and the longitudinal heat-sealing line is arranged longitudinally at the left and right ends of the first air column film 110 and the second air column film 120.

[0065] The heat-sealing structure 130 is further provided with a bent heat-sealing line, wherein the bent heat-sealing line is disposed between the bottom bag body 10 and the first side bag body 20, between the bottom bag body 10 and the second side bag body 30, and between the second side bag body 30 and the bag cover 70.

[0066] The heat-sealing structure 130 further includes a series of air column heat-sealing lines 131, wherein the air column heat-sealing lines 131 extend longitudinally, wherein the air column heat-sealing lines 131 penetrate the bottom air bag 10, the first side bag 20, the second side bag 30, the limiting bag 40 and the bag cover 70, and an independent air column unit is formed between two adjacent air column heat-sealing lines 131.

[0067] The limiting air column bag further includes at least one inflation valve 80, wherein the inflation valve 80 is disposed between the first air column membrane 110 and the second air column membrane 120, and the inflation valve 80 is located at one end of the first air column membrane 110 and the second air column membrane 120. As an example, in a specific embodiment of this application, the inflation valve 80 is disposed at the end of the bag cover 70, and inflation is performed into the air storage chamber through the inflation valve 80.

[0068] Therefore, the limiting air column bag has an inflated state and an uninflated state. In the uninflated state, the limiting air column bag is thin and light, does not take up space, and is convenient to carry and store. When inflated, the limiting air column bag can provide cushioning and protection for the packaged item.

[0069] The limiting air column bag is used as follows:

[0070] Inflate the limiting air column bag so that the limiting air column bag is in the inflated state;

[0071] Adjust the limiting bag body 40 of the limiting air column bag to the protruding position;

[0072] The packaged item is placed into the receiving space of the limiting air column bag, and the limiting bag body 40 is adjusted to the limiting position so that the limiting bag body 40 is embedded in the groove of the packaged item.

[0073] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and explained in the embodiments, and any variations or modifications may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A limiting air column bag, characterized in that, The package includes a bottom bag, a first side bag extending integrally upward from one end of the bottom bag, a second side bag extending integrally upward from the other end of the bottom bag, and at least one limiting bag. The first side bag and the second side bag are partially sealed and together with the bottom bag form a receiving cavity. The limiting bag is integrally formed on the first side bag and / or the second side bag and can switch between a protruding position and a limiting position. When in the limiting position, it is recessed into the receiving cavity and can be embedded in the groove of the packaged item to restrict the movement of the packaged item.

2. The limiting air column bag according to claim 1, characterized in that, The limiting bag is selectively positioned at the upper end, lower end, or middle position between the upper and lower ends of the first side bag, and its position corresponds to the groove position of the packaged item.

3. The limiting air column bag according to claim 1, characterized in that, The number of the limiting bags is one, two, or more, and the number is not greater than the number of grooves on the packaged item.

4. The limiting air column bag according to claim 1, characterized in that, The limiting bag body includes three or more limiting bag body units connected in sequence, and each limiting bag body unit is arranged along the air column direction of the corresponding side bag body.

5. The limiting air column bag according to claim 4, characterized in that, The limiting bag unit includes a first limiting bag unit, a second limiting bag unit, a third limiting bag unit, a fourth limiting bag unit, and a fifth limiting bag unit connected in sequence. The first limiting bag unit is connected to the first upper bag body, and the fifth limiting bag unit is connected to the first lower bag body.

6. The limiting air column bag according to claim 4 or 5, characterized in that, It also includes multiple spaced heat-sealing lines, which are formed on the first side bag and / or the second side bag to separate the forming of the limiting bag unit.

7. The limiting air column bag according to claim 1, characterized in that, The limiting bag body includes a limiting main bag body and limiting side bags extending outward from both sides of the limiting main bag body. The limiting side bags are provided with side bag heat sealing lines and are thinner than the limiting main bag body.

8. The limiting air column bag according to claim 1, characterized in that, At least one air column gap is provided between the first side bag and the second side bag, and the air column gap is used for the user to adjust the limiting bag to switch between the protruding position and the limiting position.

9. The limiting air column bag according to claim 5, characterized in that, When in the limiting position, the first to fifth limiting bag units surround and form a U-shaped limiting groove with the opening facing outward and recessed into the receiving cavity, which is used to fit and engage with the groove of the packaged item.

10. The limiting air column bag according to claim 1, characterized in that, The first side pocket includes a front pocket, a first side pocket, and a second side pocket, and the limiting pocket extends from the front pocket to the first side pocket and the second side pocket.

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