Vacuum packaging bag

Abstract

The utility model discloses a vacuum packaging bag which comprises a quadrilateral bottom plate, four sides of the quadrilateral bottom plate are respectively connected with four side plates in a rotating mode, the side plates can rotate to the position above the quadrilateral bottom plate, a notch is formed between every two adjacent side plates, the length of each side plate is smaller than or equal to that of the quadrilateral bottom plate, and the length of each side plate is larger than that of the quadrilateral bottom plate. The width of the side plates is smaller than or equal to that of the quadrilateral bottom plate; and the outer bag is arranged on the quadrilateral bottom plate in a sleeving manner. After a garment is placed on the quadrilateral bottom plate, the four side plates are rotated to the position above the garment, so that the garment is enclosed by a semi-open structure formed by the quadrilateral bottom plate and the side plates, and after the outer bag arranged on the quadrilateral bottom plate in a sleeving mode is vacuumized, the outer bag is sealed through the movable semi-open structure formed by the quadrilateral bottom plate and the side plates and the notches. Vacuum air pressure can be well transmitted to the clothes, the clothes or the bag body is prevented from wrinkling, meanwhile, the packaging thickness is reduced, and the delivery cost of a cross-border e-commerce platform is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to packing technical field, especially a vacuum packaging bag. BACKGROUND

[0002] The packaging bag is a bag used for packaging various goods and articles, and the main purpose is to protect the safety of goods during production, storage and circulation, and to facilitate transportation and storage. The wide application of packaging bags covers various fields of daily life and industrial production, especially in the food, daily-use cosmetics, electronic products, clothing and other industries, which plays an important role. Packaging bags can be designed in various forms according to the characteristics and purposes of different articles, such as plastic bags, paper bags, cloth bags, aluminum foil bags, etc.

[0003] In the modern logistics and e-commerce industry, the use of packaging bags not only involves the protection of the safety of goods, but also has an important impact on transportation costs. Especially in e-commerce platforms, such as warehousing and distribution links, logistics costs account for a large proportion. In order to reduce transportation and warehousing costs, many merchants have adopted vacuum packaging technology. Vacuum packaging is a packaging method that removes air from the packaging container to make the goods in a state close to vacuum, which can usually reduce the packaging volume, thereby reducing the space occupied during transportation, improving the efficiency of warehousing, and reducing the cost of warehousing and transportation. Specifically, vacuum packaging can effectively reduce the volume of the packaging bag by removing air from the packaging bag, thereby compressing the volume of the article and making the packaging more compact. Especially in the transportation of goods such as clothing, vacuum packaging is often widely used. By reducing the thickness and volume of the packaging, merchants can reduce the FBA warehousing costs and delivery costs of e-commerce platforms.

[0004] However, the common vacuum packaging bags on the market are made of soft nylon, polyethylene, polyester and other materials, which have good flexibility and adaptability, but also have some problems. Since these packaging bags usually do not have a clear fixed shape, they are prone to deformation after vacuumizing, and may have a phenomenon of edge lifting or wrinkling. This change in shape will cause the actual volume and thickness of the packaging bag to be calculated inaccurately during the logistics process, especially in the platform's warehousing and distribution, when the logistics scanner uses infrared scanning technology to measure the volume of the packaging object, it is easy to misjudge the volume and thickness of the packaging bag to be larger than the actual one, thereby increasing the delivery cost of the wrinkles caused by vacuumizing in the logistics delivery and tail delivery. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to solve the problem of increasing delivery cost caused by wrinkles in the vacuum bag.

[0006] In order to solve the above technical problems, the utility model provides a vacuum packaging bag, include: quadrilateral bottom plate, four edges of quadrilateral bottom plate are connected with four side plates respectively, side plate can rotate to quadrilateral bottom plate top, it is equipped with gap between adjacent side plate, the length of side plate is less than or equal to the length of quadrilateral bottom plate, the width of side plate is less than or equal to the width of quadrilateral bottom plate, outer bag, outer bag is equipped with on quadrilateral bottom plate.

[0007] Further, four side plates are divided into three short side plates and one long side plate, the length and width of long side plate are equal to the length and width of quadrilateral bottom plate, the width of short side plate is less than the width of quadrilateral bottom plate, and the long side plate is connected with the short side of the quadrilateral bottom plate.

[0008] Further, the long side plate is located above the short side plate, and the short side plate connected with the long side of the quadrilateral bottom plate is located above the short side plate connected with the short side of the quadrilateral bottom plate.

[0009] Further, the opening of the outer bag is provided with a sealing strip.

[0010] Further, the quadrilateral bottom plate and the four side plates are folded from a paperboard.

[0011] Further, the outer bag is made of transparent material.

[0012] Further, the four side plates are provided with magic tape, and the magic tape faces the top surface of the quadrilateral bottom plate.

[0013] Further, the outer bag is provided with a vacuum air outlet, and a one-way valve is arranged on the vacuum air outlet.

[0014] Further, the length of at least one side plate is equal to the length of the quadrilateral bottom plate.

[0015] Further, the width of at least three side plates is less than half of the width of the quadrilateral bottom plate.

[0016] The vacuum packaging bag provided by the utility model embodiment has the advantages that: after clothes are placed on the quadrilateral bottom plate, the four side plates are rotated above the clothes, so that the semi-open structure formed by the quadrilateral bottom plate and the side plates encloses the clothes, and after the outer bag on the quadrilateral bottom plate is subjected to vacuumizing operation, the movable semi-open structure and the gap formed by the quadrilateral bottom plate and the side plates can well transmit the vacuum air pressure to the clothes, prevent the clothes or the bag body from being wrinkled, reduce the packaging thickness, and reduce the logistics delivery fee and the tail distribution cost of the cross-border e-commerce platform. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a front view of the vacuum packaging bag provided by the utility model;

[0018] Figure 2 is a rear view of the vacuum packaging bag provided by the utility model;

[0019] Figure 3 is a plane expansion schematic view of the quadrilateral bottom plate and the side plate of the vacuum packaging bag provided by the utility model;

[0020] Figure 4 is a bottom view of the vacuum packaging bag provided by the utility model;

[0021] Figure 5 is a sectional view of the vacuum packaging bag provided by the utility model.

[0022] The correspondence between the reference signs and the component names is as follows:

[0023] 1, quadrilateral bottom plate; 11, side plate; 111, short side plate; 112, long side plate; 101, notch; 2, outer bag; 21, sealing strip. DETAILED DESCRIPTION

[0024] The specific embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model. It should be noted that: unless otherwise specified, the relative arrangement, numerical value of the components and steps set forth in these examples do not limit the scope of the utility model.

[0025] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the present utility model and its application or uses.

[0026] The technology, methods and devices known to those skilled in the relevant art can not be discussed in detail, but should be considered as part of the specification when appropriate.

[0027] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0028] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0029] As Figures 1 to 5The utility model discloses a vacuum packaging bag, including: quadrilateral bottom plate 1 and outer bag 2. Among them, four side plates 11 are rotatably connected on the four edges of quadrilateral bottom plate 1 respectively, side plate 11 can rotate to the upper of quadrilateral bottom plate 1, is equipped with the notch 101 between adjacent side plate 11, the length of side plate 11 is less than or equal to the length of quadrilateral bottom plate 1, and the width of side plate 11 is less than or equal to the width of quadrilateral bottom plate 1, outer bag 2 is set on quadrilateral bottom plate 1.

[0030] The vacuum packaging bag of the present application, by placing the clothing on the quadrilateral bottom plate 1, rotating the four side plates 11 above the clothing, forming a semi-open structure with the quadrilateral bottom plate 1 and the side plates 11, and then performing a vacuum operation on the outer bag 2 set on the quadrilateral bottom plate 1, the vacuum pressure can be effectively transmitted to the clothing through the movable semi-open structure and the notch 101 formed by the quadrilateral bottom plate 1 and the side plates 11, preventing the clothing or the bag from wrinkling and reducing the packaging thickness, thereby reducing the logistics delivery fee and the tail delivery cost of the cross-border e-commerce platform.

[0031] The combination of the quadrilateral bottom plate 1 and the rotatable side plates 11 provides good support during the packaging process of the clothing, ensuring that the packaged items will not wrinkle, increase in thickness, or deform or be damaged during transportation or storage due to external forces. The rotatable structure of the side plates 11 makes the packaging bag more flexible to use, suitable for different shapes or sizes of items. The notch 101 between adjacent side plates 11 can effectively and uniformly transmit the vacuum pressure, preventing the packaging bag from producing uneven pressure during vacuuming, thereby avoiding wrinkles or deformation of the clothing or other items and maintaining the cleanliness and integrity of the packaged items. The combination of the quadrilateral bottom plate 1 and the side plates 11 simplifies the packaging operation. After the items are placed in the quadrilateral bottom plate 1, the side plates 11 can quickly enclose to form a closed packaging space, which, together with the outer bag 2, facilitates the clothing to be loaded into the outer bag 2 and facilitates the vacuum operation, improving the packaging efficiency.

[0032] By vacuuming the vacuum packaging bag to compress the packaged items, the thickness of the packaging bag is reduced, thereby reducing the packaging volume and effectively reducing the transportation cost during the cross-border e-commerce logistics process, especially during the logistics and distribution process of the e-commerce platform, which can save the tail delivery cost. The notch 101 helps to evenly distribute the vacuum air pressure, ensuring that the vacuum operation can be effectively completed, so that the internal space of the packaging bag is completely compressed, achieving excellent packaging effect and further improving the packaging quality.

[0033] As Figure 3 And Figure 4As shown, in an optional embodiment of the utility model, the four side plates 11 are divided into three short side plates 111 and one long side plate 112. The length and width of the long side plate 112 are equal to the length and width of the quadrilateral base plate 1, the width of the short side plates 111 is less than the width of the quadrilateral base plate 1, and the long side plate 112 is connected to the short side of the quadrilateral base plate 1.

[0034] By connecting the long side plate 112 to the short side of the quadrilateral base plate 1, and ensuring that the length and width of the long side plate 112 are equal to those of the quadrilateral base plate 1, the long side plate 112 and the quadrilateral base plate 1 can clamp the front and back of the garment when packaging it, flattening the surfaces to reduce wrinkles. This also enhances the stability of the packaging bag under vacuum conditions, ensuring a stronger connection between the base plate and side plate 11 when packaging items, preventing bag deformation. Dividing the side plate 11 into three short side plates 111 and one long side plate 112 effectively reduces complex structural components and simplifies the overall construction of the packaging bag. The width of the short side plates 111 is smaller than the width of the quadrilateral base plate 1, allowing for appropriate adjustments to accommodate items of different sizes or shapes, thus improving the packaging bag's adaptability to various items. This makes the packaging bag more flexible in use and capable of packaging a wider variety of items.

[0035] By making the dimensions of the long side panel 112 equal to those of the quadrilateral base plate 1, the packaging bag can be made to fit the item more tightly during vacuuming, providing better sealing and vacuum effects, maintaining the integrity and freshness of the item, helping to reduce air penetration and oxidation, and extending the shelf life of the item. The long side panel 112 is connected to the short side of the base plate, facilitating quick unfolding and folding, improving the convenience and efficiency of packaging. During packaging operations, users can quickly rotate the side panel 11 to the top of the garment, saving time and improving production efficiency. The short side panel 111 allows the packaging bag to shrink more compactly after vacuuming, further reducing the packaging volume, saving logistics space, and helping to reduce transportation costs, especially in large-volume transportation, effectively reducing transportation expenses.

[0036] like Figure 4 and Figure 5 As shown, in an optional embodiment of the utility model, the long side plate 112 is located above the short side plate 111, and the short side plate 111 connected to the long side of the quadrilateral base plate 1 is located above the short side plate 111 connected to the short side of the quadrilateral base plate 1.

[0037] By positioning the long side plates 112 above the short side plates 111, the structure of the packaging bag is more compact and stable during deployment and use. The relative positional relationship between the short side plates 111 effectively prevents the packaging bag from tilting or deforming during use, improving overall stability and preventing the packaging bag from being affected by improper operation. The structure in which the long side plates 112 are connected to the long edges of the bottom plate and the short side plates 111 are connected to the short edges of the bottom plate allows the side plates 11 to fit closely when forming a closed space, enhancing the sealing performance of the packaging bag and helping to ensure that air is completely expelled during vacuum operation, preventing air and moisture from entering and maintaining the quality and freshness of the packaged items. The positional relationship between the short side plates 111 and the long side plates 112 makes the packaging bag easier to operate during use. The positioning of the long side plates 112 above the short side plates 111 makes the combination of side plates 11 smoother, facilitating quick packaging operations and improving packaging efficiency while reducing the complexity of human operation.

[0038] By sequentially rotating the long side plates 112 and the short side plates 111 above the quadrilateral bottom plate 1, the packaging bag can adapt to different shapes and sizes of packaging items. The relative positional relationship between the long side plates 112 and the short side plates 111 allows the packaging bag to more evenly wrap different types of items when closed, ensuring vacuum effect while avoiding excessive gaps in the packaging bag, further improving packaging tightness. The reasonable cooperation between the short side plates 111 and the long side plates 112 allows the packaging bag to compress the packaging volume to the maximum extent after shrinking, reducing the occupied space and thus reducing storage and transportation costs, improving the space utilization of the packaging bag in the logistics link, and having important significance for saving logistics costs.

[0039] As shown in Figure 1 and Figure 2 In an optional embodiment of the utility model, the opening of the outer bag 2 is provided with a sealing strip 21. By providing the sealing strip 21 at the opening of the outer bag 2, the opening of the packaging bag can be effectively ensured to be tightly closed during use, preventing air, moisture, or contaminants from entering the bag, greatly improving the sealing performance of the packaging bag and ensuring the freshness and quality of the items inside the bag for a long time. The sealing strip 21 allows the opening of the packaging bag to be easily closed and opened, allowing users to quickly perform the sealing operation with simple operation, saving time and effort, and enhancing the convenience of the packaging bag, making it suitable for efficient production and packaging processes.

[0040] The reinforcing effect of the sealing strip 21 effectively prevents air from re-entering the packaging bag, ensuring a more durable and stable vacuum extraction effect. This feature is especially important for packaging items that require maintaining a vacuum environment for extended periods, extending the shelf life and preservation effect. The sealing strip 21 further enhances the protective capabilities of the outer bag 2, particularly during transportation and storage, preventing external environmental damage to the packaged items, such as moisture and dust. This additional layer of protection effectively reduces the risk of the packaged items being affected by external factors. The sealing strip 21 allows for effective sealing using simple manual or automated equipment without the need for additional complex machinery, thereby reducing packaging costs and making it suitable for mass production and packaging needs.

[0041] like Figure 3 As shown, in an optional embodiment of the utility model, the quadrilateral base plate 1 and the four side plates 11 are formed by folding a single piece of cardboard.

[0042] By using a single sheet of cardboard folded into a quadrilateral base plate 1 and four side plates 11, a high level of integrated structural strength and stability is achieved. The cardboard material possesses good rigidity and load-bearing capacity, ensuring the packaging bag is not easily deformed during storage and transportation, protecting the contents from external damage. Simultaneously, the cardboard material's malleability facilitates the rotation of the side plates 11 onto the quadrilateral base plate 1. Using cardboard as the primary material effectively reduces production costs. Compared to other materials such as plastics or metals, cardboard is more economical, has a simpler processing technology, and is suitable for large-scale production, thus providing manufacturers with a more cost-effective packaging solution. As a renewable material, cardboard is highly environmentally friendly. Vacuum packaging bags formed by folding cardboard not only reduce the burden on the environment but also facilitate recycling and reuse. For environmentally conscious consumers and businesses, this is a greener choice.

[0043] Cardboard is easily processed through simple folding and cutting, allowing for adjustments to the size and shape of packaging bags as needed. This processing flexibility enables vacuum packaging bags to adapt to the packaging needs of different sizes and types of items, demonstrating strong adaptability. The folded structure of cardboard provides additional protection for the packaging bags. The sturdiness of cardboard effectively reduces the risk of collision, compression, or damage to packaged items during transportation and storage, making it particularly suitable for fragile items or those requiring extra protection. In addition to its excellent structural properties, cardboard can also enhance the appearance of packaging bags through printing and other processes. Companies can improve brand recognition and enhance their market competitiveness through customized printing.

[0044] In an optional embodiment of the utility model, the outer bag 2 is made of transparent material. By using transparent material to make the outer bag 2, consumers and manufacturers can clearly see the contents of the packaging bag. Not only improves the visibility of the product, but also can effectively avoid errors or omissions due to improper or damaged packaging. Transparent material makes the goods can be directly displayed in front of the consumer, enhance the attraction of goods. Especially for display needs, transparent can help products better attract customer attention, improve the sales opportunities of products. Transparent outer bag 2 helps to carry out more accurate quality control in the production and packaging process. Manufacturers can directly see the state of the goods in the packaging bag, ensure that each packaging meets the quality standards, reduce the risk of unqualified products into the market.

[0045] By using transparent material, the contents of the packaging can be avoided to be maliciously tampered with or replaced. Due to the transparency of the outer bag 2, any foreign matter or packaging defects can be clearly displayed, thereby protecting the rights and interests of consumers. Transparent material allows consumers to directly see the true state of the goods before removing the packaging, without worrying about whether there are problems hidden in the packaging. This open and transparent packaging method helps to improve the trust and confidence of consumers in their purchase decisions. Transparent material is suitable for various types of product packaging, especially for products that need to show color, shape or texture. Transparent packaging can maximize the natural beauty and appeal of the product, adapting to the packaging needs of various products.

[0046] In an optional embodiment of the utility model, four side plates 11 are provided with Velcro, and the Velcro faces the top surface of the quadrilateral base plate 1. By providing four side plates 11 with Velcro, and the Velcro facing the top surface of the quadrilateral base plate 1, the semi-closed structure formed by the side plates 11 and the quadrilateral base plate 1 can be easily packaged and closed or opened. Users only need to adhere the Velcro together to quickly complete the closure of the semi-closed structure, avoiding the inconvenience of traditional sealing methods such as adhesive tape and cable ties during use, improving the convenience and efficiency of operation. The Velcro allows the semi-closed structure to be closed and opened multiple times, with good reusability. Compared with one-time sealing methods, the Velcro can effectively prolong the service life of the packaging bag, reduce packaging costs, and meet environmental protection needs. Because the Velcro can flexibly adjust the degree of closure, it can adapt to the packaging of items of different sizes and shapes. Even if the shape of the packaged contents is irregular, the Velcro can be adjusted as needed to make the packaging bag fit better and improve the stability of the packaging. The packaging bag sealed with Velcro can be easily disassembled and resealed during storage and transportation. Consumers or businesses do not have to worry about the difficulty or insecurity of the packaging bag during use, and the Velcro makes the operation more flexible and convenient. The Velcro can improve the user experience, providing a simple, fast and safe sealing method. Users can easily open and reseal the packaging bag, avoiding the problems that may occur with traditional sealing methods, such as poor adhesion and tearing.

[0047] In an optional embodiment of the utility model, the outer bag 2 is provided with a vacuum air outlet, and a one-way valve is arranged on the vacuum air outlet. By providing a vacuum air outlet and a one-way valve, air in the bag can be quickly and effectively extracted. The one-way valve ensures that air can only flow out of the packaging bag and not back into the bag, effectively preventing air from re-entering the packaging bag and ensuring a continuous vacuum state in the packaging. By using the vacuum air outlet and one-way valve together, the vacuum environment in the bag can be maintained for a long time, reducing the impact of oxygen in the air on packaged items, delaying the spoilage and deterioration of food, medicine and other items, extending their shelf life and improving the preservation quality of goods. The vacuum air outlet and one-way valve make the vacuum packaging process more convenient. Users only need to connect the vacuum air outlet to the air extraction equipment, and after air extraction is complete, the one-way valve will automatically close without the need for additional operation, greatly simplifying the packaging process and improving the convenience of use. The vacuum air outlet and one-way valve are not only suitable for food packaging, but also suitable for medicine, electronic products and other items that require moisture resistance and oxidation resistance, and can meet the needs of various industries for item preservation and packaging, with strong adaptability and versatility.

[0048] The combination of a vacuum extraction port and a one-way valve effectively prevents air, moisture, and other contaminants from entering the packaging bag, thus preventing oxidation, dampness, and bacterial invasion of the goods. This helps maintain the original quality of the goods and is especially suitable for long-term storage and transportation. During the sealing and extraction process, the one-way valve prevents damage to the packaging bag due to excessive extraction, while also avoiding the risk of air backflow. This improves the stability and safety of the packaging bag, ensuring that the packaged goods are not affected by the external environment.

[0049] like Figure 1 and Figure 3 As shown, in an optional embodiment of the utility model, at least one side plate 11 has a length equal to the length of the quadrilateral base plate 1. By ensuring that the length of at least one side plate 11 is equal to the length of the quadrilateral base plate 1, it can be ensured that the packaging bag can completely fit the item after vacuuming, reducing residual air space and improving the vacuum effect. A more uniform bag shape helps to achieve more efficient air expulsion, maintain a long-term vacuum environment, and further extend the shelf life of the item. At the same time, the equal length of the side plate 11 and the quadrilateral base plate 1 allows the vacuum packaging bag to maintain a more stable shape during use, effectively avoiding deformation of the bag due to short or asymmetrical side plates 11, and ensuring that the packaging bag is not easily twisted or collapsed during vacuuming. The equal length of the side plate 11 and the base plate makes the packaging bag more uniform under vacuum, reducing thickness. The equal length of the side plate 11 and the base plate makes the packaging bag more adaptable, allowing for more flexible wrapping of various items, especially rectangular or regular-shaped items, enabling more precise packaging and reducing unnecessary internal bag space. When the length of the side plate 11 is equal to the length of the bottom plate, the structure of the packaging bag is more symmetrical and regular, making it easier for operators to seal, evacuate and seal it, reducing operational difficulties caused by irregular bag shape.

[0050] like Figure 3 and Figure 4 As shown, in an optional embodiment of the utility model, at least three side plates 11 have a width less than half the width of the quadrilateral base plate 1. By ensuring that the width of at least three side plates 11 is less than half the width of the quadrilateral base plate 1, it is easier for the three side plates 11 to rotate above the quadrilateral base plate 1, avoiding collisions between the side plates 11 on both sides during rotation. This allows the vacuum packaging bag to be effectively evacuated after being filled with items, thus better adapting to items of different shapes and sizes. It also allows the packaging bag to fit more tightly to the items before evacuation, reducing unnecessary gaps, reducing packaging thickness, and improving packaging efficiency. The smaller width of the side plates 11 ensures that the bag body is easier to shrink during evacuation, reducing residual air inside the bag and enhancing the vacuum effect. The bag body can fit more tightly to the packaged items, avoiding residual air and further improving the freshness and sealing of the items.

[0051] By making the width of the side plates 11 less than half the width of the quadrilateral base plate 1, the material usage of the packaging bag is more efficient, avoiding excessive material waste and reducing the size of the excess part, so that the packaging bag can reduce production costs and improve material usage efficiency while ensuring functionality. Due to the smaller width of the three side plates 11, the packaging bag can be more easily aligned and tightly wrapped around the item during the packaging process, making it easy to operate. The stability of the bag after shrinking is strong, reducing the difficulty of operation caused by asymmetry or irregular shape. The smaller width of the side plates 11 makes the packaging bag more compact and neat, avoiding loose or irregular appearance of the bag, improving the visual effect of the packaging bag, especially in commercial sales, the beautiful appearance of the packaging can improve the market appeal of the product. At the same time, the smaller width of the side plates 11 can adapt to the packaging of various shapes of items, especially suitable for packaging smaller or tightly packed items. The smaller width of the side plates 11 makes the packaging bag more flexible, allowing it to adapt to different sizes and shapes of goods, increasing the versatility and adaptability of the packaging bag.

[0052] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and substitutions can be made, these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A vacuum packaging bag, characterized by The utility model relates to a four-side bottom plate, four side plates are rotatably connected to four edges of the four-side bottom plate respectively, the side plate can rotate to the four-side bottom plate top, gap is equipped between adjacent side plates, the length of side plate is less than or equal to the length of four-side bottom plate, the width of side plate is less than or equal to the width of four-side bottom plate, outer bag is equipped on four-side bottom plate. The utility model relates to a four-side bottom plate, four side plates are rotatably connected to four edges of the four-side bottom plate respectively, the side plate can rotate to the four-side bottom plate top, gap is equipped between adjacent side plates, the length of side plate is less than or equal to the length of four-side bottom plate, the width of side plate is less than or equal to the width of four-side bottom plate, outer bag is equipped on four-side bottom plate. The four side plates are divided into three short side plates and one long side plate, the length and width of the long side plate are equal to the length and width of the four-side bottom plate, the width of the short side plate is less than the width of the four-side bottom plate, and the long side plate is connected to the short edge of the four-side bottom plate.

2. The vacuum packaging bag according to claim 1, characterized in that, The long side plate is located above the short side plate, and the short side plate connected to the long edge of the four-side bottom plate is located above the short side plate connected to the short edge of the four-side bottom plate.

3. The vacuum packaging bag according to claim 2, characterized in that, The opening of the outer bag is provided with a sealing strip.

4. The vacuum packaging bag according to claim 1, wherein, The four-side bottom plate and the four side plates are folded from a piece of paperboard.

5. The vacuum packaging bag according to claim 1, wherein, The outer bag is made of transparent material.

6. The vacuum packaging bag according to claim 1, wherein, The four side plates are provided with Velcro, and the Velcro faces the top surface of the four-side bottom plate.

7. The vacuum packaging bag according to claim 1, wherein, The outer bag is provided with a vacuum air outlet, and a one-way valve is arranged on the vacuum air outlet.

8. The vacuum packaging bag according to claim 1, wherein, At least one of the side plates has a length equal to that of the four-side bottom plate.

9. The vacuum packaging bag according to claim 1, wherein, At least three of the side plates have a width less than half the width of the four-side bottom plate.

10. The vacuum packaging bag according to claim 1, wherein, ​

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