A large-capacity suitcase
By incorporating recessed slots at the bottom of the suitcase and connecting them to omnidirectional wheels, combined with a rigid support structure and lining material, the problem of the suitcase's small actual size is solved, achieving a larger capacity and higher space utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PINGHU CITY ZHONGCUN CASE MAKING
- Filing Date
- 2025-07-18
- Publication Date
- 2026-05-26
AI Technical Summary
Existing suitcases have a smaller actual size than the measured size due to the protruding casters, resulting in low space utilization.
The bottom of the suitcase features a rectangular array of recessed slots, into which the casters are rotatably connected. Combined with a rigid reinforced bottom plate and support plate, a rigid support structure is formed. The inner lining is made of polyester fiber to reduce friction, and a pull rod and handle are provided on the outside of the suitcase for easy carrying.
While maintaining the same external dimensions, the internal volume of the suitcase has been increased, improving space utilization, providing stable support and aesthetics, while reducing friction damage to internal items from the casters.
Smart Images
Figure CN224268515U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of luggage technology, and in particular to a large-capacity luggage. Background Technology
[0002] Suitcases are luggage with pull rods and wheels. They are widely used for travel and carrying clothes and other items due to their convenience. Suitcases can be divided into two main categories based on their materials and structures: hard-sided and soft-sided. Hard-sided suitcases are made of rigid materials, are highly impact-resistant, and are suitable for protecting fragile or valuable items. Soft-sided suitcases are made of flexible materials, are lightweight and expandable, and are suitable for carrying soft items or for scenarios that require flexible storage.
[0003] However, most existing suitcases have protruding casters at the bottom. Since airlines define the size by the vertical distance from the highest point of the suitcase, including the handles and wheels, to the ground, the protruding casters take up some space, resulting in the actual size of the suitcase being slightly smaller than the measured size. Utility Model Content
[0004] The purpose of this application is to provide a large-capacity suitcase that increases the internal volume of the suitcase without changing the overall height of the suitcase. This solves the problem that most existing suitcases have protruding bottom casters. Since airlines define the size of the suitcase by the vertical distance from the highest point of the suitcase, including the handles and wheels, to the ground, the protruding casters occupy some space, resulting in the actual size of the suitcase being slightly smaller than the measured size.
[0005] The present application provides a large-capacity suitcase with the following technical solution: a large-capacity suitcase includes a suitcase body, the bottom of which has four recessed slots arranged in a rectangular array, the upper ends of which are rotatably connected to universal wheels, a reinforcing base plate is fixedly connected to the bottom of the inside of the suitcase body, a support plate is fixedly connected to one side of the inside of the suitcase body, and an inner lining is fixedly connected to the inner wall of the suitcase body.
[0006] By adopting the above technical solution, and by setting an embedded groove at the bottom of the suitcase body and rotatably connecting it to the universal wheels, the length of the universal wheels protruding from the bottom of the suitcase body is shortened. While maintaining the same external dimensions, this frees up the space occupied by traditional wheels, thereby increasing the internal volume of the suitcase within the same size. Simultaneously, due to the embedded groove, the universal wheels' flexible steering performance is maintained while reducing their protruding length, ensuring unobstructed movement during use. The suitcase body's interior uses a reinforced bottom plate and support plate to form a rigid support structure, providing support during use. The lining covers the internal seams and support structure, improving the suitcase's aesthetics, and its smooth surface reduces friction damage to internal items. By rotatably mounting the universal wheels within the embedded groove, the length of the universal wheels protruding from the bottom of the suitcase is reduced, improving space utilization and allowing for a larger volume within the same dimensions.
[0007] Preferably, a fixing block is fixedly connected to one side of the bottom inside the suitcase body, a pull rod is fixedly connected to the upper end of the fixing block, a storage slot is fixedly connected to one side of the upper end of the suitcase body, and the end of the pull rod away from the fixing block passes through the storage slot.
[0008] By adopting the above technical solution, a pull rod is set on one side of the bottom inside the suitcase body, and a storage groove is set on the upper part of the outer wall of the suitcase body. The lower end of the pull rod is fixed inside the suitcase body, and the upper end passes through the storage groove and extends out of the suitcase body. It is used to pull the suitcase when in use. When the pull rod is retracted, the upper end of the pull rod can be embedded in the storage groove to keep the appearance of the suitcase body flat.
[0009] Preferably, a first handle is fixedly connected to the upper end of the suitcase body, and a second handle is fixedly connected to one side of the suitcase body.
[0010] By adopting the above technical solution, a first handle is provided at the top of the suitcase and a second handle is provided on the side. The first handle at the top makes it easy to lift the suitcase vertically, while the second handle on the side makes it easy to carry the suitcase horizontally. When encountering obstacles such as stairs, the first and second handles can be flexibly selected to lift the suitcase and pass through the obstacles.
[0011] Preferably, a lid is rotatably connected to one side of the suitcase body.
[0012] By adopting the above technical solution, and through the design of the lid, when it is necessary to take out or put in items, the zipper is opened, the lid is flipped open along one side of the suitcase body, the items are placed inside the suitcase body, and the zipper is closed to restrict the opening of the lid and protect the items inside.
[0013] Preferably, a first storage bag is fixedly connected to the bottom of the lid surface, and a second storage bag is fixedly connected to the top of the lid surface.
[0014] By adopting the above technical solution, and by setting a first storage bag and a second storage bag on the upper and lower areas of the lid surface respectively, items can be stored in separate sections. The first storage bag has a larger capacity and is suitable for placing flat items. The second storage bag is located at the upper part of the lid surface, making it easy to take out and put in the items inside. It is suitable for placing items that need to be taken out frequently, such as power banks, earphones, and passports.
[0015] Preferably, the suitcase body is a soft case made of Oxford cloth, and the outer wall of the suitcase body is coated with a waterproof coating.
[0016] By adopting the above technical solution, using a soft case made of Oxford cloth as the main body and coating the outer wall with a waterproof coating, Oxford cloth has high tear resistance. When it is squeezed or collided, it can disperse the pressure through deformation to avoid cracking and damage. The waterproof coating on the outer wall forms a protective film. When it is splashed by rain or briefly wetted, water droplets will form beads on the surface and slide off, preventing water from penetrating into the interior and protecting the clothes or electronic devices inside the case from moisture.
[0017] Preferably, both the reinforcing base plate and the support plate are made of rigid plastic.
[0018] By adopting the above technical solution, and by reinforcing the bottom plate and support plate with rigid plastic material, the rigid plastic bottom plate and support plate form a stable load-bearing structure when the suitcase is loaded with heavy objects. This disperses the pressure on the bottom and sides of the suitcase body, prevents the Oxford cloth material from deforming and collapsing due to excessive stretching or compression, and ensures that the suitcase body has a sturdy profile.
[0019] Preferably, the inner lining is made of polyester fiber material.
[0020] By adopting the above technical solution and using polyester fiber material to make the lining, the smooth surface of the polyester fiber forms a low-friction protective layer inside the suitcase. At the same time, because polyester fiber has high abrasion resistance, it can prevent the internal support structure and pull rod of the suitcase from directly contacting the items and prevent scratches.
[0021] In summary, this application includes at least one of the following beneficial technical effects:
[0022] This large-capacity suitcase features an embedded groove at the bottom of the suitcase body that connects to omnidirectional wheels, shortening the length of the wheels protruding from the bottom of the suitcase body. While maintaining standard dimensions, this design frees up the bottom space traditionally occupied by suitcase wheels, thus improving space utilization. The suitcase body is made of Oxford cloth with a waterproof coating on the outer wall. The Oxford cloth's flexibility and tear resistance prevent the suitcase body from cracking, while the waterproof coating prevents rainwater penetration. Internally, a rigid plastic reinforced bottom plate and support plate form a support structure to prevent the soft suitcase body from collapsing and deforming. Meanwhile, a polyester fiber lining forms a smooth protective layer, reducing friction damage to items and concealing internal seams. A pull rod is also included. The suitcase features a storage slot on the upper part of its outer wall. The lower end of the pull rod is fixed inside the suitcase body, while the upper end extends through the storage slot and out of the suitcase body. When in use, the pull rod is used to pull the suitcase. When the pull rod is retracted, the upper end of the pull rod can be inserted into the storage slot, keeping the suitcase body flat. The suitcase body has a first handle on the upper part and a second handle on the side. The first handle on the upper part makes it easy to lift the suitcase vertically, while the second handle on the side makes it easy to carry the suitcase horizontally. When encountering obstacles such as stairs, the first and second handles can be used to lift the suitcase and pass through obstacles. The lid surface has a first and second storage pocket, which allows for quick access to frequently used items and neat storage of flat items. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the overall structure of this application;
[0024] Figure 2 This is a schematic diagram of the moving wheel installation structure of the present application.
[0025] Figure 3 This is a schematic diagram of the supporting structure of this application.
[0026] Figure 4 This is a schematic diagram of the handheld device structure of this application;
[0027] Figure 5 This is a cross-sectional view of the overall structure of this application.
[0028] Figure 6 This is a schematic diagram of the structure of the box door after it is opened.
[0029] In the picture:
[0030] 1. Suitcase body; 2. Embedded slot; 3. Universal wheels; 4. Reinforced base plate; 5. Support plate; 6. Lining; 7. Fixing block; 8. Pull rod; 9. Storage slot; 10. First handle; 11. Second handle; 12. Suitcase lid; 13. First storage bag; 14. Second storage bag. Detailed Implementation
[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail below.
[0032] Example 1: A large-capacity suitcase, referring to Figure 1 , Figure 2 and Figure 3 The suitcase includes a main body 1. The bottom of the main body 1 has four recessed slots 2 arranged in a rectangular array. Each of the four recessed slots 2 is rotatably connected to a caster wheel 3. By setting the recessed slots 2 at the bottom of the main body 1 and rotatably connecting the caster wheels 3, the length of the caster wheels 3 protruding from the bottom of the main body 1 is shortened. While maintaining the same external dimensions, this frees up space occupied by traditional wheels, thereby increasing the internal volume of the suitcase within the same size. Furthermore, due to the recessed slots 2, the caster wheels 3 can maintain their flexible steering performance while reducing their protruding length. This design ensures that the suitcase body 1 is not obstructed during use. A reinforcing base plate 4 is fixedly connected to the bottom of the suitcase body 1, and a support plate 5 is fixedly connected to one side of the suitcase body 1. The reinforcing base plate 4 and the support plate 5 form a rigid support structure inside the suitcase body 1, which provides support for the suitcase body 1 during use. An inner lining 6 is fixedly connected to the inner wall of the suitcase body 1. The inner lining 6 covers the seams and support structure inside the suitcase body 1, improving the aesthetics of the interior and reducing friction damage to the contents through its smooth surface.
[0033] Reference Figure 3 and Figure 4 A fixing block 7 is fixedly connected to one side of the bottom inside the suitcase body 1. A pull rod 8 is fixedly connected to the upper end of the fixing block 7. A storage slot 9 is fixedly connected to one side of the upper end of the suitcase body 1. The end of the pull rod 8 away from the fixing block 7 passes through the storage slot 9. By setting the pull rod 8 on one side of the bottom inside the suitcase body 1 and the storage slot 9 on the upper part of the outer wall of the suitcase body 1, the lower end of the pull rod 8 is fixed inside the suitcase body 1, and the upper end passes through the storage slot 9 and extends out of the suitcase body 1. It is used to pull the suitcase when in use. When the pull rod 8 is retracted, the upper end of the pull rod 8 can be inserted into the suitcase body 1. The suitcase is placed inside the storage compartment 9, keeping the appearance of the suitcase body 1 flat. A first handle 10 is fixedly connected to the upper end of the suitcase body 1, and a second handle 11 is fixedly connected to one side of the suitcase body 1. By setting the first handle 10 at the upper end of the suitcase body 1 and the second handle 11 on the side, the first handle 10 at the upper end makes it easy to lift the suitcase vertically, and the second handle 11 on the side makes it easy to carry the suitcase horizontally. When encountering obstacles such as stairs, the first handle 10 and the second handle 11 can be used flexibly to lift the suitcase and pass through the obstacles.
[0034] Example 2: A large-capacity suitcase, referring to Figure 3 , Figure 5 and Figure 6 A lid 12 is rotatably connected to one side of the suitcase body 1. With the lid 12 in place, when items need to be retrieved, the zipper is unzipped, the lid 12 is flipped open along one side of the suitcase body 1, items are placed inside, and the zipper is closed to prevent the lid 12 from opening and protect the contents. A first storage bag 13 is fixedly connected to the bottom of the lid 12 surface, and a second storage bag 14 is fixedly connected to the top of the lid 12 surface. By setting the first storage bag 13 and the second storage bag 14 on the upper and lower areas of the lid 12 surface respectively, items can be stored in separate compartments. The first storage bag 13 has a larger capacity and is suitable for flat items. The second storage bag 14 is located at the top of the lid 12 surface, making it easy to retrieve items inside, and is suitable for storing frequently accessed items such as power banks, earphones, and passports. The suitcase body 1 is a soft case made of Oxford cloth, and the outer wall of the suitcase body 1 is coated with a waterproof coating. It has high tear resistance and can disperse pressure through deformation when subjected to compression or impact, avoiding cracking and damage. The waterproof coating on the outer wall forms a protective film. When exposed to rain splashes or brief wetness, water droplets will form beads on the surface and slide off, preventing moisture from penetrating into the interior and protecting clothing or electronic devices inside the suitcase from moisture. The reinforced bottom plate 4 and support plate 5 are both made of rigid plastic. By using rigid plastic for both the reinforced bottom plate 4 and support plate 5, a rigid support structure is formed. When the suitcase is loaded with heavy objects, the rigid plastic bottom plate and support plate 5 form a stable load-bearing structure, dispersing the pressure on the bottom and sides of the suitcase body 1 and preventing the Oxford cloth material from deforming and collapsing due to excessive stretching or compression, ensuring that the suitcase body 1 has a sturdy outline. The inner lining 6 is made of polyester fiber. By using polyester fiber for the inner lining 6, the smooth surface of the polyester fiber forms a low-friction protective layer inside the suitcase. At the same time, because polyester fiber has high abrasion resistance, it can prevent the internal support structure and pull rod 8 of the suitcase body 1 from directly contacting the items, preventing scratches.
[0035] The implementation principle of this application embodiment is as follows:
[0036] This suitcase features an embedded groove 2 at the bottom of the main body 1, which connects to omnidirectional wheels 3. This shortens the length of the wheels 3 protruding from the bottom of the main body 1, freeing up the bottom space traditionally occupied by suitcase wheels while maintaining dimensional standards. This improves space utilization without affecting the steering performance of the wheels 3. The reinforced bottom plate 4 and support plate 5 inside the main body 1 are made of hard plastic, providing stable support for the Oxford cloth soft-sided body and preventing deformation and collapse when loaded with heavy items, ensuring full utilization of the internal volume. The inner lining 6, made of polyester fiber, covers the stitching and support structure, enhancing aesthetics and reducing friction damage to items through its smooth surface. The suitcase body 1 can be pulled out from the storage slot 9 by the pull rod 8. When folded up, the upper end of the pull rod 8 is embedded in the storage slot 9 to keep the appearance flat. The first handle 10 and the second handle 11 are convenient for vertical lifting and horizontal carrying, respectively, to meet the needs of different scenarios. The lid 12 is rotatably connected to one side of the suitcase body 1, making it easy to open and close. The first storage bag 13 and the second storage bag 14 on the surface allow for partitioned storage of items. The first storage bag 13 is suitable for placing flat items, and the second storage bag 14 is suitable for placing small items that need to be frequently accessed. The waterproof coating on the outer wall of the Oxford cloth suitcase body 1 can resist rain splashes and protect the internal items from moisture. This suitcase increases the capacity of the suitcase while ensuring portability and protection.
[0037] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.
Claims
1. A large-capacity suitcase, comprising a suitcase body (1), characterized in that: The bottom of the suitcase body (1) has four recessed slots (2) arranged in a rectangular array. The upper ends of the four recessed slots (2) are rotatably connected to casters (3). The bottom of the suitcase body (1) is fixedly connected to a reinforcing base plate (4). The inside of the suitcase body (1) is fixedly connected to a support plate (5). The inner wall of the suitcase body (1) is fixedly connected to an inner lining (6).
2. A large-capacity suitcase according to claim 1, characterized in that: A fixing block (7) is fixedly connected to one side of the bottom of the suitcase body (1). A pull rod (8) is fixedly connected to the upper end of the fixing block (7). A storage slot (9) is fixedly connected to one side of the upper end of the suitcase body (1). The end of the pull rod (8) away from the fixing block (7) passes through the storage slot (9).
3. A large-capacity suitcase according to claim 1, characterized in that: The upper end of the suitcase body (1) is fixedly connected to a first handle (10), and the side of the suitcase body (1) is fixedly connected to a second handle (11).
4. A large-capacity suitcase according to claim 1, characterized in that: The suitcase body (1) is rotatably connected to a lid (12) on one side.
5. A large-capacity suitcase according to claim 4, characterized in that: A first storage bag (13) is fixedly connected to the bottom of the surface of the box lid (12), and a second storage bag (14) is fixedly connected to the top of the surface of the box lid (12).
6. A large-capacity suitcase according to claim 1, characterized in that: The suitcase body (1) is a soft case made of Oxford cloth, and the outer wall of the suitcase body (1) is coated with a waterproof coating.
7. A large-capacity suitcase according to claim 1, characterized in that: Both the reinforcing base plate (4) and the support plate (5) are made of rigid plastic.
8. A large-capacity suitcase according to claim 1, characterized in that: The lining (6) is made of polyester fiber.