Expandable backpack

Abstract

The utility model discloses an expandable backpack. The expandable backpack comprises a backpack body and straps, the bag body comprises a main storage cavity at the front end and a bag body back at the rear end; the bag further comprises a compression bag and an outer zipper belt. Sheet type connecting edges are formed on the edges of the two sides of the compression bag in the circumferential direction. The connecting edge is respectively connected with the main storage cavity and the back part of the bag body, so that the compression bag is arranged between the main storage cavity and the back part of the bag body; the outer zipper tape comprises a front zipper tape and a rear zipper tape; one side of the front zipper tape is connected with the circumferential edge of the main storage cavity in a closed manner; one side of the rear zipper tape is connected with the circumferential edge of the back of the bag body in a closed manner; the outer zipper tape is arranged outside the compression bag, and the width of the compression bag is larger than that of the outer zipper tape in a closed state. The knapsack with the compression bag is reasonable in structural distribution, and normal use of other storage spaces is not affected when the compression bag of the knapsack is expanded or folded.

Description

Technical Field

[0001] This utility model relates to the field of backpacks, and more particularly to a backpack with an expandable capacity. Background Technology

[0002] In the luggage industry, backpacks and rolling suitcases are the most commonly used storage tools for people traveling, and the two hold roughly equal positions in the market. Compared to rolling suitcases, backpacks have the advantage of flexibility and portability, allowing them to be carried around at all times; however, their storage space is often less than that of rolling suitcases. Therefore, luggage manufacturers are working to expand the capacity of backpack products, for example, by incorporating vacuum compression bags to meet the demand for increased storage. For instance, a Chinese utility model patent with publication number CN209965553U discloses an outdoor backpack with a vacuum compression bag device. The backpack includes a main body, a solar panel along the upper edge of the shoulder straps, and a vacuum compression bag inside. The vacuum compression bag is equipped with a miniature electric air pump, a USB port, and a charging port. The solar panel and USB port are connected to the miniature electric air pump. In use, the solar panel or USB port powers the miniature electric air pump and charging port to evacuate the vacuum compression bag or power items such as mobile phones. When not in use, the vacuum compression bag can be removed via a zipper. While the product does offer some capacity expansion, the vacuum compression bag, located within the main storage cavity, occupies space once items are placed inside, making the remaining space uneven. This makes it difficult to place items such as laptops and tablets stably, causing considerable inconvenience for users. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this utility model provides a backpack with a reasonable structural distribution and excellent capacity expansion effect. This utility model is achieved through the following technical solution:

[0004] An expandable backpack includes a bag body and shoulder straps; the bag body includes a main storage cavity at the front end and a back panel at the rear end; it also includes a compression bag and an external zipper strap; the compression bag has thin connecting edges formed on both circumferential sides; the connecting edges are respectively connected to the main storage cavity and the back panel, such that the compression bag is positioned between the main storage cavity and the back panel; the external zipper strap includes a front zipper strap that is closed to the circumferential edge of the main storage cavity on one side and a rear zipper strap that is closed to the circumferential edge of the back panel on one side; the front and rear zipper straps are closed by a zipper; the external zipper strap is located outside the compression bag, and the width of the compression bag is greater than the width of the external zipper strap in the closed state.

[0005] Preferably, the compression bag includes an annular wall and two relatively flat planes; the two circumferential edges of the wall are respectively closed and connected to the circumferential edges of the planes, and the connection is sealed and forms a connecting edge.

[0006] Preferably, the enclosure is equipped with a sealing zipper belt and an air valve device.

[0007] Preferably, the sealing zipper tape and the air valve device are located on the same side, and this side is the same as the side where the end of the outer zipper tape is located.

[0008] Preferably, a storage cavity for storing a computer is provided between the compression bag and the back of the bag body. The storage cavity has an opening that is closed by a zipper, and the opening faces upward.

[0009] Preferably, a vertical webbing is provided on the outer wall of the main storage cavity.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] 1. The compression bag is positioned between the main storage cavity and the back of the bag. Whether the compression bag is folded or expanded, it does not affect the capacity of the main storage cavity, facilitating the categorized storage of items. Furthermore, the sealing zipper and air valve are located on the bag's sidewalls, ensuring that items will not interfere with other storage spaces when accessed, making retrieval convenient.

[0012] 2. The sealing zipper, air valve device, and outer zipper tape are all located on the same side, allowing users to open and close the compression bag without fully pulling open the outer zipper tape, making operation more convenient.

[0013] 3. This utility model also provides a vertical webbing for the backpack that can serve as a handle or be hung on a pull rod. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model (the compression bag is in an expanded state);

[0015] Figure 2 This is a structural schematic diagram of an embodiment of the present invention (compression bag in a folded state);

[0016] Figure 3 This is a schematic diagram of the compression bag in the inflated state according to an embodiment of the present invention;

[0017] Figure 4 This is an exploded view of the compression bag according to an embodiment of the present invention. Detailed Implementation

[0018] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "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 utility model 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, they should not be construed as limitations on this utility model.

[0019] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] like Figure 1-4 As shown, this utility model discloses an expandable backpack, including a bag body and shoulder straps 8 disposed on the back of the bag body. Two shoulder straps 8 are conventionally provided. The bag body includes a main storage cavity 1 at the front end and a back panel 7 at the rear end; in this embodiment, the main storage cavity 1 refers to the front part of the bag body, including the front panel of a conventional backpack and the largest storage compartment beyond the front panel. This storage compartment can be a closed bag, meaning the main storage cavity is a complete three-dimensional closed structure; of course, the storage compartment can also be a semi-closed structure, meaning the main storage cavity is open on the side facing the back panel 7.

[0022] This embodiment also includes a compression bag and an outer zipper strap; the compression bag has thin connecting edges 20 formed on both circumferential sides; the connecting edges 20 are respectively connected to the main storage cavity 1 and the back of the bag body 7, so that the compression bag is positioned between the main storage cavity 1 and the back of the bag body 7; the outer zipper strap includes a front zipper strap 10 that is closed to the circumferential edge of the main storage cavity 1 on one side and a rear zipper strap 9 that is closed to the circumferential edge of the back of the bag body 7 on one side; the front zipper strap 10 and the rear zipper strap 9 are closed by a zipper 100; the outer zipper strap is located outside the compression bag, and the width of the compression bag is greater than the width of the outer zipper strap in the closed state.

[0023] The backpack in this embodiment has two states: partial folding and expanded. When the front zipper strap 10 and the rear zipper strap 9 are closed by the zipper 100, the compression bag is compressed and folded inside the outer zipper strap because the width of the compression bag is greater than the width of the outer zipper strap in the closed state. After the front zipper strap 10 and the rear zipper strap 9 are separated, the compression bag can be fully expanded. When the compression bag is fully expanded, the backpack's capacity reaches its maximum.

[0024] Furthermore, the compression bag consists of three parts: an annular wall 3 and two relatively flat planes 2. The two circumferential edges of the wall 3 are respectively closed and connected to the circumferential edges of the planes 2, and the connection is sealed to form a connecting edge 20. The connecting edge 20 is generally formed by conventional techniques in the field of compression bags, such as adhesive bonding and heat sealing. The connecting edge 20 is then connected to the main storage cavity 1 and the back of the bag body 7 by processes such as sewing or heat sealing.

[0025] Furthermore, if the main storage cavity 1 is open on the side facing the back 7 of the bag, the user can directly contact one side plane 2 of the compression bag when opening the largest storage compartment. This side plane 2 can be equipped with a sealing zipper strap 4 and an air valve device 5, allowing the user to open and close the compression bag from within the largest storage compartment. This method has some inconvenience, as the user needs to empty the items in the largest storage compartment before using the compression bag. Therefore, to solve this problem, this embodiment preferably places the sealing zipper strap 4 and the air valve device 5 on the enclosure wall 3. The user can open and close the compression bag without passing through the largest storage compartment, making the operation more convenient. Moreover, this embodiment innovatively achieves the opening and closing of the compression bag without completely opening the outer zipper strap. Specifically, this is achieved by placing the sealing zipper strap 4 and the air valve device 5 on the same side, which is the same side as the side where the end 90 of the outer zipper strap is located. Figure 2 Based on this, pull the zipper 100 back a certain distance to expose the sealing zipper strip 4 and the air valve device 5.

[0026] The sealing zipper belt 4 and the air valve device 5 are widely used in the field of vacuum compression bags, and will not be described in detail here.

[0027] Furthermore, in this embodiment, a storage cavity 6 for storing a computer is provided between the compression bag and the back of the bag body 7. The storage cavity 6 has an opening that is closed by a zipper 60, with the opening facing upwards. This storage cavity 6 can be used to store a computer or tablet. This embodiment solves the technical problem of laptops, tablets, and other items being difficult to place stably, causing many inconveniences for users, by separating various items.

[0028] Furthermore, a vertical webbing 11 is provided on the outer wall of the main storage compartment 1. The webbing 11 can be used as a handle or to hang the backpack on the handle of the suitcase.

[0029] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A scalable backpack comprising a bag body and a shoulder strap; the bag body comprising a main storage cavity at a front end and a bag body back at a rear end; characterized in that, The bag further comprises a compression bag and an outer zipper strip; the circumferential edges of the compression bag are provided with sheet-like connecting edges; the connecting edges are connected with the main storage cavity and the back of the bag body respectively, so that the compression bag is arranged between the main storage cavity and the back of the bag body; the outer zipper strip comprises a front zipper strip connected with the circumferential edge of the main storage cavity and a rear zipper strip connected with the circumferential edge of the back of the bag body; the front and rear zipper strips are closed by a zipper; The outer zipper strip is arranged outside the compression bag, and the width of the compression bag is greater than the width of the outer zipper strip in the closed state.

2. The expandable backpack of claim 1, wherein, The compression bag comprises an annular wall and two flat surfaces opposite to each other; the circumferential edges of the two sides of the wall are respectively connected with the circumferential edges of the flat surfaces, the connecting parts are sealed and form connecting edges.

3. The expandable backpack of claim 2, wherein, The wall is provided with a sealed zipper strip and a gas valve device.

4. The expandable backpack of claim 3, wherein, The sealed zipper strip and the gas valve device are arranged on the same side, and the side is the same as the side where the terminal of the outer zipper strip is located.

5. The expandable backpack of claim 1, wherein, A storage cavity for storing a computer is further arranged between the compression bag and the back of the bag body, the storage cavity is provided with an opening closed by a zipper, and the opening faces upward.

6. The expandable backpack of claim 4, wherein, A vertical webbing is arranged on the outer side wall of the main storage cavity.

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