Foldable box body and shopping cart applying foldable box body

The design, which combines a flexible folding section with fixed fasteners and a rotating connection, solves the problem of existing boxes or shopping carts being unable to be sealed and folded in a complicated manner. It achieves easy folding and liquid containment functions, reducing costs and improving the user experience.

CN223860331UActive Publication Date: 2026-02-03石忠磊
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Patent Information

Application Number
CN202520019344.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-04
Publication Date
2026-02-03
Estimated Expiration
2035-01-04

AI Technical Summary

Technical Problem

Existing boxes or shopping carts cannot achieve complete sealing, and their folding methods are complex, requiring additional structures to fix the unfolded shape, increasing costs and inconvenience.

Method used

The flexible folding section is integrally formed with the front and rear panels or connected movably. Combined with fixed fasteners and rotating connections, the box has a foldable structure and liquid holding capacity.

Benefits of technology

It achieves complete sealing of the box and easy folding, reducing production costs and improving ease of use and flexibility.

✦ Generated by Eureka AI based on patent content.

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Abstract

The embodiment of the utility model discloses a foldable box body and a shopping cart applying the foldable box body, the foldable box body forms a containing space through box plates, the box plates comprise a front box plate and a rear box plate, a flexible folding part is arranged between the front box plate and the rear box plate, and a foldable structure is formed between the front box plate and the rear box plate through the flexible folding part. The foldable box body is arranged on the shopping cart. The foldable box body provided by the embodiment of the utility model at least comprises the flexible folding part, and the flexible folding part, the front box plate, the rear box plate and other parts are matched to form a foldable structure, so that the containing space of the box body can be changed along with deformation of the flexible folding part, and storage and placement in different use scenes are facilitated. The shopping cart with the foldable box body has good sealing performance, can be used for loading and transporting liquid compared with a shopping cart with a full-rigid structure, and has wider applicability and use value.
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Description

Technical Field

[0001] This application relates to a box and a shopping cart, and more particularly to a foldable box and a shopping cart using the foldable box. Background Technology

[0002] Existing shopping carts or boxes typically have rigid structures, making it difficult to achieve complete sealing at joints or folds, or requiring costly modifications to achieve a complete seal. They can only hold or load solids and cannot transport liquids. Furthermore, rigid structures often involve complex folding methods, preventing one-step folding or unfolding, and require various additional structures to maintain the unfolded shape, increasing inconvenience and manufacturing costs. These problems urgently need to be addressed. Utility Model Content

[0003] The purpose of this application is to provide a foldable box and a shopping cart using the foldable box. The first technical problem to be solved is to overcome the defect that the box or shopping cart in the prior art cannot be completely sealed. The second technical problem to be solved is that no additional structure is needed to fix the shape of the box or shopping cart after it is unfolded.

[0004] According to one aspect of the present application, a foldable box is provided, the foldable box forming a receiving space through box panels, the box panels including a front box panel and a rear box panel, a flexible folding portion being provided between the front box panel and the rear box panel, and the front box panel and the rear box panel forming a foldable structure through the flexible folding portion.

[0005] According to at least one specific embodiment of the present application, the flexible folding part is integrally formed or movably connected with the front box panel and the rear box panel.

[0006] According to at least one specific embodiment of the present application, the flexible folding part is U-shaped, one side of the flexible folding part is fixedly connected to the front box panel, and the other side of the flexible folding part is fixedly connected to the rear box panel.

[0007] According to at least one specific embodiment of the present application, a fixing fastener is provided between the front box panel and the rear box panel, with one end of the fixing fastener movably connected to the front box panel and the other end movably connected to the rear box panel.

[0008] According to at least one specific embodiment of the present application, the fixing fastener is strip-shaped, with fixing posts at both ends of the fixing fastener, and fixing holes corresponding to the fixing posts are provided at corresponding positions on the front box panel and the rear box panel.

[0009] According to at least one specific embodiment of the present application, it further includes an upper box plate, which is rotatably connected to the rear box plate, and / or: it further includes a lower box plate, which is rotatably connected to the front box plate.

[0010] According to at least one specific embodiment of the present application, a fixing slot is provided at the edge of the upper box plate, and a slot corresponding to the fixing slot is provided at the corresponding edge positions of the front box plate and the rear box plate.

[0011] According to at least one specific embodiment of the present application, an upper box plate pivot is provided on the front box plate, and an upper box plate rotation slot corresponding to the upper box plate pivot is provided on the upper box plate. A lower box plate rotation hole is provided on the rear box plate, and a lower box plate rotation shaft corresponding to the lower box plate rotation hole is provided on the lower box plate.

[0012] According to at least one specific embodiment of the present application, a flip pull ring or flip pull strap is provided on the upper box plate.

[0013] According to at least one specific embodiment of the present application, a storage compartment is provided on the inner side of the front panel, and a rotary switch is installed on the storage compartment.

[0014] According to another aspect of the embodiments of this application, a shopping cart is provided, wherein the shopping cart is provided with the aforementioned foldable box.

[0015] According to at least one specific embodiment of the present application, a retractable handle is installed at the upper end of the front panel.

[0016] According to at least one specific embodiment of the present application, the retractable handle is rotatably connected to the front panel.

[0017] According to at least one specific embodiment of the present application, omnidirectional wheels are provided at the bottom of the shopping cart.

[0018] According to at least one specific embodiment of the present application, ramp wheels are detachably provided on the lower part of both sides of the shopping cart.

[0019] The embodiments of this application have the following advantages compared with the prior art:

[0020] The foldable case provided in this application includes at least a flexible folding part. The flexible folding part, together with components such as the front panel and the rear panel, forms a foldable structure, so that the storage space of the case can be changed with the deformation of the flexible folding part, making it convenient for storage and placement in different usage scenarios.

[0021] Since the folding and unfolding of the foldable box are achieved through its own components and structure, the foldable box and the shopping cart using the foldable box do not require additional structures to fix the unfolded shape of the box or shopping cart. This reduces the structural complexity of the box and shopping cart, lowers the manufacturing cost, and improves the user experience.

[0022] In addition to the functions of conventional boxes and shopping carts, shopping carts with foldable boxes also have the function of storing liquids through the application of flexible folding parts. Since the flexible folding parts have stronger sealing performance than rigid structures, the foldable boxes and shopping carts provided in this application embodiment can hold or contain liquids, ensuring no leakage, and have more uses than traditional boxes and shopping carts. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. Wherein:

[0024] Figure 1 This is a three-dimensional structural diagram of the foldable box and shopping cart according to an embodiment of this application.

[0025] Figure 2 This is a front view structural diagram of the foldable box and shopping cart according to an embodiment of this application.

[0026] Figure 3 This is a side view of the foldable box and shopping cart according to an embodiment of this application.

[0027] Figure 4 This is a bottom view of the foldable box and shopping cart according to an embodiment of this application.

[0028] Figure 5 This is a 3D structural diagram of the foldable box and shopping cart from another perspective.

[0029] Figure 6 This is an exploded structural diagram of the foldable box and shopping cart according to an embodiment of this application.

[0030] Figure 6A This is a structural diagram of the fastener.

[0031] Figure 7 This is a structural diagram of the foldable box and shopping cart with the top panel opened according to an embodiment of this application.

[0032] Figure 7A This is a structural diagram showing the connection relationship between the lower box panel and the front box panel.

[0033] Figure 7B This is a structural diagram showing the connection relationship between the upper box panel and the rear box panel.

[0034] Figure 8 This is a structural diagram of the foldable box and shopping cart in the compressed state according to the embodiments of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Front box panel; 2-Flexible folding section; 20-Flexible folding section accommodating space; 3-Rear box panel; 4-Upper box panel; 5-Lower box panel; 6-Retractable handle; 7-Storage compartment; 8-Turn switch; 9-Flip pull strap; 10-Universal wheels; 11-Climbing wheel set; 12-Fixing fastener; 13-Connection between lower box panel and front box panel; 14-Connection between upper box panel and rear box panel. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0038] like Figures 1 to 8As shown, this application embodiment provides a foldable box and a shopping cart using the foldable box. The foldable box forms a storage space through box panels, which include a front box panel 1 and a rear box panel 3. A flexible folding part 2 is provided between the front box panel 1 and the rear box panel 3, forming a foldable structure between the front box panel 1 and the rear box panel 3. In the main implementation of this application embodiment, a foldable box can be achieved by providing at least one flexible folding part 2 between the front box panel 1 and the rear box panel 3. Typically, apart from the flexible folding part 2, other components of the box, such as the front box panel 1 and the rear box panel 3, are made of non-flexible rigid materials, such as hard plastic, metal alloys, etc., but the possibility that components such as the front box panel 1 and the rear box panel 3 are made of other flexible foldable materials is not excluded. The foldable case provided in this application embodiment can be a case open at one end or open at both ends. For example, it can be a case whose top and bottom are movably connected to the front panel 1 and the rear panel 3. The main feature of the foldable case is achieved through the flexible folding part 2, the front panel 1, and the rear panel 3. There are no particular restrictions on the specific shape of the case. Optional types of flexible foldable materials can include polymer films, fiber fabrics, rubber, etc., as long as they simultaneously satisfy the requirements of flexibility and foldability. When the foldable case and the shopping cart using the foldable case are unfolded, the front panel 1 and the rear panel 3 are at their farthest distance, and the flexible folding part 2 is also at its maximum unfoldable range. At this time, the case has the largest carrying capacity and is suitable for transporting goods or liquids, with a shape similar to a regular suitcase, luggage cart, or shopping cart. When the foldable box is in the folded state, the front panel 1 and the rear panel 3 are at their minimum distance, and the flexible folding part 2 is also at its minimum unfoldable range. At this time, the box has the smallest capacity and the overall space of the box is relatively flat, which is suitable for placing the box when not in use and reducing the space occupied by the box and the shopping cart.

[0039] Optionally, the flexible folding section 2 can be integrally formed or movably connected to the front box panel 1 and the rear box panel 3. Integral forming refers to processing the flexible folding section 2 into a single structure with the front box panel 1 and the rear box panel 3 in a single process during manufacturing. The characteristics of integral forming are a more compact product structure and a simpler, smoother appearance. Because it reduces the gaps between different components, it improves the product's strength and stability. Since there are no additional connection points, it reduces the risk of fragility or failure caused by connection points. It also reduces assembly steps, improves production efficiency, lowers costs, and facilitates the realization of more complex design concepts.

[0040] The movable connection refers to the connection of the flexible folding part 2, the front box panel 1, and the rear box panel 3 in a movable manner. The characteristic of the movable connection is that it allows relative movement between the components. The advantage of using the movable connection for the front box panel 1, the flexible folding part 2, and the rear box panel 3 is that it can adapt to the usage needs of different scenarios. When it is necessary to adjust the angle or position, the movable connection can provide flexibility, facilitate disassembly and maintenance. If a component is damaged, it can be replaced directly without replacing the entire structure. The movable connection can also absorb vibrations and impacts from the outside to a certain extent, thus protecting the overall structure of the box and the shopping cart.

[0041] As a further improvement to the embodiments of this application, in some embodiments the flexible folding part 2 is U-shaped, with one side of the flexible folding part 2 fixedly connected to the front box panel 1 and the other side of the flexible folding part 2 fixedly connected to the rear box panel 3. In these embodiments, the shape of the flexible folding part 2 is usually consistent with the shape of the front box panel 1 and the rear box panel 3, that is, the shape of the front box panel 1 and the rear box panel 3 is also approximately U-shaped, the bottom of the U-shape is the bottom of the box body, and the two sides of the U-shape are connected to the two sides of the box body, that is, connecting the front box panel 1 and the rear box panel 3. The front box panel 1 and the rear box panel 3 can be configured with a structure with flanges, the flanges are arranged opposite each other in space, and the function of the flanges is to be fixedly or movably connected to the flexible folding part 2 as connecting parts. When the box changes from an unfolded state to a folded state, the front panel 1 and the rear panel 3 move towards each other, reducing the box's accommodating space. A flexible folding section accommodating space 20 is formed between the front panel 1 and the rear panel 3 to accommodate the flexible folding section 2. After folding, the two sides of the box form a three-fold structure: the front panel 1, the flexible folding section accommodating space 20 (for accommodating the flexible folding section 2), and the rear panel 3. The flexible folding section accommodating space 20 formed between the flanges of the front panel 1 and the rear panel 3 after the box is folded provides the conditions for accommodating the flexible folding section 2. Only structures made of flexible materials can be accommodated in the flexible folding section accommodating space 20. The use of flexible materials for the flexible folding section 2 is a substantial feature and key technology of this application embodiment, and it represents a significant improvement compared to the prior art.

[0042] In some embodiments, a fastener 12 is provided between the front box panel 1 and the rear box panel 3. One end of the fastener 12 is movably connected to the front box panel 1, and the other end is movably connected to the rear box panel 3. The fastener 12 is strip-shaped, with fixing posts at both ends. Fixing holes matching the fixing posts are provided at corresponding positions on the front box panel 1 and the rear box panel 3. The fixing posts on the fastener 12 cooperate with the fixing holes on the front box panel 1 and the rear box panel 3 to fix the flexible folding part 2 to the front box panel 1 and the rear box panel 3, preventing loosening. The fixing posts are located inside the strip-shaped fixing fastener 12. They are two opposing posts with a certain gap between them. The fixing fastener 12 has a certain elasticity, which can finely adjust the distance between the two posts. When fixing, only a little force is applied to make the fixing fastener 12 deform slightly, increasing the gap between the fixing posts. Then, the two posts are aligned with the fixing holes between the front box panel 1 and the rear box panel 3 to complete the fixed connection between the flexible folding part 2 and the front box panel 1 and the rear box panel 3.

[0043] In some embodiments, the foldable case includes an upper panel 4 and a lower panel 5 in addition to the front panel 1 and the rear panel 3. The upper panel 4 is rotatably connected to the rear panel 3, and the lower panel 5 is rotatably connected to the front panel 1. The upper panel 4 and the lower panel 5 do not necessarily have to exist simultaneously. The foldable case may have only one upper panel 4, only one lower panel 5, or both upper panel 4 and lower panel 5. That is, the upper and lower panels of the foldable case may exist only once or both simultaneously. Both the upper panel 4 and the lower panel 5 are configured to be rotatably connected to accommodate the deformation of the flexible folding part 2. After the flexible folding part 2 deforms, the positional relationship between the front panel 1 and the rear panel 3 changes. The upper panel 4 and the lower panel 5 can be stored inside the case through the rotatable connection, making the structure of the case more compact. The upper and lower panels achieve storage when the case is deformed through their own rotatable connection structure, without the need for additional structures or occupying external space of the case.

[0044] Figure 7A and Figure 7B The diagram shows the connection point 13 between the lower and front panels, and the connection point 14 between the upper and rear panels. Referring to the attached diagram, the rotatable connection between the upper and lower panels and the front and rear panels is as follows: a fixing slot is provided at the edge of the upper panel 4, and corresponding slots are provided at the corresponding edges of the front and rear panels 1 and 3. The rear panel 3 has an upper panel pivot, and the upper panel 4 has an upper panel rotation slot corresponding to the upper panel pivot. The front panel 1 has a lower panel rotation hole, and the lower panel 5 has a lower panel rotation shaft corresponding to the lower panel rotation hole. In the design of the structure of the connection point 13 between the front and rear panels and the connection point 14 between the upper and rear panels, the upper panel refers to the cover, and the part on the lower panel rotation shaft is a bottom-reinforced partition.

[0045] The fixing slots at the edge of the upper box panel 4 engage with corresponding slots on the front box panel 1 and the rear box panel 3, enabling quick positioning and fixation of the box during connection, thus improving assembly efficiency. The engagement of the fixing slots and slots also enhances the structural stability of the box, providing multiple contact points for the connection between the rear box panel 3 and the upper box panel 4, distributing stress and reducing the risk of damage caused by stress on a single connection point. The upper box panel pivot on the rear box panel 3 engages with the rotation slot on the upper box panel, enabling the upper box panel to rotate freely within a certain angle range, facilitating the unfolding and folding of the box. The engagement of the pivot and slots also makes rotation smoother, reducing friction and wear, and extending the service life of the box.

[0046] The rotating hole on the lower panel of the front panel 1 is matched with the rotating shaft on the lower panel, so that the lower panel 5 can rotate around the rotating shaft to realize the folding and unfolding of the box. The precise matching of the rotating hole and the rotating shaft ensures the stability and reliability of the box during the folding and unfolding process, and avoids damage or malfunction of the box due to inaccurate matching.

[0047] The design of the rotating connection between the upper and lower panels and the front and rear panels allows for rapid folding and unfolding of the case, improving its flexibility and practicality. This results in a smaller footprint during transportation and storage, making it easier to carry and store. The case can also be quickly unfolded to meet usage needs, enhancing its durability and reliability over long-term use. Precise fit and smooth rotation reduce damage caused by friction and wear, enabling the case to operate stably in various environments.

[0048] The rotating connection between the upper and lower panels and the front and rear panels simplifies the assembly and maintenance process of the enclosure, realizing the multi-functionality of folding and unfolding the enclosure. The combination of fixed bayonet and slot makes the assembly of the enclosure faster and more convenient, while the design of the pivot and rotating hole makes it easier to maintain and replace the enclosure parts, reducing maintenance costs and time.

[0049] As a further embodiment of this application, in some implementations, a flip-up pull strap 9, also known as a flip-up pull ring, is provided on the upper box panel 4. Pulling the flip-up pull strap 9 can cause the upper box panel 4 to rotate around a pivot. A storage slot 7 is provided on the inner side of the front box panel 1, and a rotary switch 8 is installed on the storage slot 7. By rotating the rotary switch 8, the storage slot 7 can be opened, and items can be placed in the storage slot 7, further enhancing the functionality of the foldable box and shopping cart.

[0050] One important application of the foldable box disclosed in this application is in shopping carts. Through reasonable configuration and improvement, the foldable box in any of the embodiments disclosed in this application can be installed on a shopping cart. Of course, the specific applications of this application are not limited to shopping carts. Depending on the needs of different application scenarios, the foldable box provided in this application can be applied to various products, such as storage boxes, lockers, vehicle cabinets, etc.

[0051] As a further improvement to the shopping cart, a retractable handle 6 can be installed on the upper part of the front panel. The retractable handle 6 is rotatably connected to the front panel 1 of the foldable box, making it convenient for users to pull the shopping cart. Universal wheels 10 are provided at the bottom of the shopping cart, and ramp wheels 11 are detachably installed on the lower part of both sides of the shopping cart. The retractable handle 6 is installed on the upper part of the front panel 1 and has a telescopic mechanism, for example, composed of multiple interconnected metal or plastic tubes. These telescopic metal or plastic tubes are connected by springs and limiting devices, enabling smooth telescopic movement. The retractable handle 6 allows the shopping cart to be retracted to its shortest state when not in use, greatly reducing the size of the shopping cart and making it easy to store and carry. When retracted, the shopping cart can be folded and placed in a corner or cabinet without taking up too much space. The length of the retractable handle 6 can be adjusted according to different usage scenarios. When the shopping cart needs to be used, simply pull the retractable handle 6 gently, and it will quickly extend to the appropriate length, making it convenient for users to push and pull the shopping cart. The omnidirectional wheel 10 typically consists of a wheel with a rotating axle and a fixed bracket. The wheel can rotate freely 360 degrees in the horizontal plane, while the rotating axle allows the wheel to swing at a certain angle in the vertical direction. A shopping cart equipped with the omnidirectional wheel 10 can move flexibly in all directions and can change direction at any time during movement. The climbing wheel set 11 typically consists of a set of three wheels and a corresponding support structure. The set of three wheels and the support structure can be raised, lowered, or folded relative to the main body of the shopping cart. Mounting brackets for the climbing wheel set 11 are located on both sides of the bottom of the shopping cart, and the climbing wheel set is detachably fixed to the brackets using bolts or other connectors. When the shopping cart needs to travel on a slope, the climbing wheel set 11 can be unfolded, increasing the wheelbase and ground contact area, thereby improving the shopping cart's climbing ability and stability, preventing the shopping cart from tipping over due to excessive slope, and allowing the shopping cart to better adapt to various road conditions. The detachable design of the climbing wheel set allows users to choose whether to install it according to actual needs, avoiding increasing the weight and size of the shopping cart when the climbing function is not needed.

[0052] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0054] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "top," and "bottom," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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 the embodiments of this application. Furthermore, unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0055] In the embodiments of this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0057] The above descriptions are merely some embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A foldable box, characterized in that, The foldable box body forms an accommodating space through box panels, each box panel including a front box panel and a rear box panel. A flexible folding section is provided between the front box panel and the rear box panel, forming a foldable structure between the front box panel and the rear box panel. The flexible folding section is U-shaped, with one side of the flexible folding section fixedly connected to the front box panel and the other side of the flexible folding section fixedly connected to the rear box panel. A fixing fastener is provided between the front box panel and the rear box panel, with one end of the fixing fastener movably connected to the front box panel and the other end movably connected to the rear box panel.

2. The foldable case according to claim 1, characterized in that, The flexible folding section is integrally formed with or movably connected to the front and rear box panels.

3. The foldable case according to claim 1, characterized in that, The fastener is strip-shaped, with fixing posts at both ends, and fixing holes corresponding to the fixing posts are provided at corresponding positions on the front and rear panels.

4. The foldable case according to claim 1, characterized in that, It also includes an upper box panel, which is rotatably connected to the rear box panel, and / or: It also includes a lower box panel, which is rotatably connected to the front box panel.

5. The foldable case according to claim 4, characterized in that, A fixing slot is provided at the edge of the upper box plate, and a slot corresponding to the fixing slot is provided at the corresponding edge positions of the front box plate and the rear box plate.

6. The foldable case according to claim 4, characterized in that, An upper box plate pivot is provided on the front box plate, and an upper box plate rotation slot corresponding to the upper box plate pivot is provided on the upper box plate. A lower box plate rotation hole is provided on the rear box plate, and a lower box plate rotation shaft corresponding to the lower box plate rotation hole is provided on the lower box plate.

7. The foldable case according to claim 6, characterized in that, A flip-up pull ring or flip-up pull strap is provided on the upper box plate.

8. The foldable case according to claim 1, characterized in that, A storage compartment is provided on the inside of the front panel, and a rotary switch is installed on the storage compartment.

9. A shopping cart, characterized in that, The shopping cart is provided with a foldable box body as described in any one of claims 1 to 7.

10. The shopping cart according to claim 9, characterized in that, A retractable handle is installed at the upper end of the front panel.

11. The shopping cart according to claim 10, characterized in that, The retractable handle is rotatably connected to the front panel.

12. The shopping cart according to claim 9, characterized in that, The shopping cart is equipped with casters at the bottom.

13. The shopping cart according to claim 11, characterized in that, The shopping cart is equipped with detachable ramp wheels on the lower part of both sides.