Collapsible airtight bag trolley case

Abstract

The utility model discloses detachable airtight bag draw -bar box, including first box and second box, first box and second box zip connection, first box inside fixed mounting has airtight bag subassembly. The utility model has the advantages of good protective property, solved the current draw -bar box in the process of using, waterproof and poor tensile effect, easily lead to airtight bag liquid -permeable and broken, cause the damage of airtight bag internal preservation article, reduced the problem of protective effect.

Description

Technical Field

[0001] This utility model relates to the field of luggage technology, specifically a detachable airtight bag trolley case. Background Technology

[0002] A rolling suitcase is a type of travel luggage with a retractable handle and wheels, allowing users to pull rather than carry it. This design makes luggage easier to move, especially in places like airports, train stations, or hotels. Rolling suitcases are typically made of hard or soft materials and most are equipped with multiple features, such as an external handle, internal compartments, locks, and a height-adjustable handle. The wheels are usually located at two opposite corners on the bottom, allowing the suitcase to glide easily in any direction. Depending on size and capacity, rolling suitcases can be categorized into small carry-on suitcases, medium, and large checked suitcases.

[0003] Existing airtight bags inside suitcases have poor waterproofing and tensile strength during use, which can easily lead to leakage and breakage, damaging the items stored inside and reducing their protective effect. Utility Model Content

[0004] The purpose of this utility model is to provide a detachable airtight bag trolley case with good protection. It solves the problem that the existing trolley case's internal airtight bag has poor waterproof and tensile strength during use, which easily leads to leakage and breakage of the airtight bag, causing damage to the items stored inside the airtight bag and reducing the protective effect.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a detachable airtight bag trolley case, comprising a first case body and a second case body, wherein the first case body and the second case body are connected by a zipper, characterized in that: an airtight bag assembly is fixedly installed inside the first case body;

[0006] The airtight bag assembly includes an airtight bag body, and a plurality of elastic pull straps are fixedly connected to the surface of the airtight bag body. The end of the elastic pull strap away from the airtight bag body is connected to the inner wall of the first box.

[0007] The airtight bag body includes a middle layer, a first adhesive layer fixedly connected to the inner side of the middle layer, an inner layer fixedly connected to the inner side of the first adhesive layer, a second adhesive layer fixedly connected to the outer side of the middle layer, and an outer layer fixedly connected to the outer side of the second adhesive layer.

[0008] As a preferred embodiment of the detachable airtight bag trolley case of this utility model, wheels are fixedly installed on the left side of both the first and second case bodies.

[0009] As a preferred embodiment of the detachable airtight bag trolley case of this utility model, a telescopic trolley rod is provided on the right side surface of the first case body.

[0010] As a preferred embodiment of the detachable airtight bag trolley case of this utility model, the surface of the airtight bag body is connected to a detachable zipper.

[0011] As a preferred embodiment of the detachable airtight bag trolley case of this utility model, a fixing cloth ring is connected to the outside of the detachable zipper, and the fixing cloth ring is sewn to the inner wall of the first case.

[0012] As a preferred embodiment of the detachable airtight bag trolley case of this utility model, the front of the airtight bag body is respectively equipped with a sealing zipper, a vacuum one-way valve and a power-assisted pull ring.

[0013] As a preferred embodiment of the detachable airtight bag trolley case of this utility model, the airtight bag body has a storage space inside, the vacuum one-way valve is connected to the storage space, and the sealing zipper seals the storage space.

[0014] As a preferred embodiment of the detachable airtight bag trolley case of this utility model, the four corners of the inner wall of the first case are fixedly connected with limit straps, and buckles are fixedly connected to the limit straps.

[0015] In a preferred embodiment of the detachable airtight bag trolley case of this utility model, the middle layer is an aluminized PET film, and the first adhesive layer and the second adhesive layer are hot melt adhesives.

[0016] In a preferred embodiment of the detachable airtight bag trolley case of this utility model, the middle layer is an aluminized PET film, and the first adhesive layer and the second adhesive layer are hot melt adhesives.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. This utility model ensures the airtightness of the airtight bag body through a sealing zipper, preventing moisture or odors from entering and protecting the stored items from damage. By pressing the airtight bag body or connecting a vacuum pump through a one-way valve, the air inside the airtight bag body can be expelled (extracted), reducing the space occupied. It is especially suitable for compressing clothing or other compressible items to save space. The fixing cloth ring firmly fixes the airtight bag body in the first box. After the items inside the airtight bag body are stored, the items can also be placed on top of the airtight bag body. After placement, the items are fixed by buckles and limiting straps, improving the utilization rate of storage space. Attached Figure Description

[0019] Figure 1 This is the front view of the present utility model;

[0020] Figure 2 This is a front view of the airtight bag assembly of this utility model;

[0021] Figure 3 This is a front sectional view of the main body of the airtight bag of this utility model;

[0022] Figure 4 This is a partial sectional view of the present invention;

[0023] Figure 5 This is a schematic diagram of the main structure of the airtight bag of this utility model.

[0024] In the diagram: 1. First box; 2. Airtight bag assembly; 201. Airtight bag body; 202. Fixing cloth ring; 203. Removable zipper; 204. Sealing zipper; 205. Vacuum check valve; 206. Assist pull ring; 207. Storage space; 208. Middle layer; 209. First adhesive layer; 210. Inner layer; 211. Second adhesive layer; 212. Outer layer; 3. Wheel; 4. Telescopic pull rod; 5. Buckle; 6. Limiting strap; 7. Second box; 8. Elastic pull strap. Detailed Implementation

[0025] Please see Figures 1-5 A detachable airtight bag trolley case includes a first case body 1 and a second case body 7. The first case body 1 and the second case body 7 are connected by a zipper. An airtight bag assembly 2 is fixedly installed inside the first case body 1.

[0026] Furthermore, wheels 3 are fixedly installed on the left side of both the first box 1 and the second box 7, and a telescopic rod 4 is provided on the right side surface of the first box 1.

[0027] By setting wheels 3, users can easily move the suitcase on the ground, and by setting telescopic handle 4, users can easily hold the suitcase.

[0028] Furthermore, the airtight bag assembly 2 includes an airtight bag body 201.

[0029] Furthermore, a detachable zipper 203 is connected to the surface of the airtight bag body 201, and a fixing cloth ring 202 is connected to the outside of the detachable zipper 203. The fixing cloth ring 202 is sewn to the inner wall of the first box 1. A sealing zipper 204, a vacuum one-way valve 205, and an assisting pull ring 206 are respectively installed on the front of the airtight bag body 201.

[0030] Furthermore, the airtight bag body 201 has a storage space 207 inside, a vacuum one-way valve 205 is connected to the storage space 207, a sealing zipper 204 seals the storage space 207, and limit straps 6 are fixedly connected to the four corners of the inner wall of the first box 1, with buckles 5 fixedly connected to the limit straps 6.

[0031] When you need to place an item inside the suitcase, first open the connection between the first compartment 1 and the second compartment 7 to unfold it into two parts. Place the item to be packed into the storage space 207 inside the airtight bag body 201, close the sealing zipper 204, and ensure that the airtight bag body 201 is completely sealed. If you need to further compress the item, press the airtight bag body 201 or connect the vacuum pump through the vacuum one-way valve 205 to expel (extract) the air inside the airtight bag body 201, reducing the space occupied. After ensuring that the airtight bag body 201 is completely sealed, close the first compartment 1 and the second compartment 7 and zip them up.

[0032] The sealing zipper 204 ensures the airtightness of the airtight bag body 201, preventing moisture or odors from entering and protecting the stored items from damage. By pressing the airtight bag body 201 or connecting the vacuum pump to the vacuum valve 205, the air inside the airtight bag body 201 can be expelled, reducing the space occupied. It is especially suitable for compressing clothing or other compressible items to save space. The fixing cloth ring 202 firmly fixes the airtight bag body 201 inside the first box 1. After the items inside the airtight bag body 201 are stored, the items can also be placed on top of the airtight bag body 201. After placement, the items are fixed by the buckle 5 and the limiting strap 6, improving the utilization rate of the storage space.

[0033] Furthermore, several elastic straps 8 are fixedly connected to the surface of the airtight bag body 201, and one end of the elastic strap 8 away from the airtight bag body 201 is connected to the inner wall of the first box 1.

[0034] Furthermore, the elastic pull strap 8 includes an elastic body with a circular cross-section, a core material inside the elastic body, and a fabric covering layer wrapped around the surface. The elastic body is made of neoprene rubber, the core material is spring steel wire, and the fabric covering layer is polyester fiber. The elastic pull strap 8 has metal fixing heads at both ends. One end of the metal fixing head is threaded to the inner wall of the first box 1, and the other end of the metal fixing head is fixedly connected to the surface of the airtight bag body 201.

[0035] By setting the elastic strap 8, a buffer can be provided between the first box 1 and the airtight bag body 201. Due to its elasticity, it can absorb the impact force caused by handling, transportation or environmental changes. When the volume of the contents of the airtight bag body 201 changes, the elastic strap 8 can automatically adjust the tension to avoid structural damage caused by rigid connection.

[0036] Neoprene rubber is known for its excellent weather resistance, oil resistance, and oxidation resistance, making it ideal for outdoor or harsh environments. Its good elasticity and resilience ensure that the elastic band 8 can return to its original shape after long-term stress. The spring steel wire gives the elastic band 8 extremely high tensile strength and fatigue resistance, which means that it is not easily damaged or deformed even under long-term high tension. Polyester fiber has excellent abrasion resistance and tear resistance, while also providing a certain degree of anti-slip effect. Wrapping polyester fiber around the outside of the elastomer not only protects the internal neoprene rubber and spring steel wire from the influence of the external environment, but also increases the overall aesthetics of the band and makes it easier to grip or fix.

[0037] The metal fixing head achieves a stable connection with the inner wall of the first box 1 and the surface of the airtight bag body 201, improving the stability and reliability of the entire system. The metal fixing head can not only firmly connect different components, but also withstand greater tensile force, avoiding breakage at the connection due to excessive tensile force. Compared with a flat cross-section, the circular cross-section of the pull strap is more evenly distributed when subjected to pressure in all directions, reducing the possibility of local stress concentration and thus extending the service life. The metal fixing head is threadedly connected to the inner wall of the first box 1, allowing the elastic pull strap 8 to be removed from the inner wall of the first box 1. Then, the user can open the disassembly zipper 203 to remove the airtight bag body 201 for cleaning.

[0038] Furthermore, the airtight bag body 201 includes an intermediate layer 208, a first adhesive layer 209 is fixedly connected to the inner side of the intermediate layer 208, an inner layer 210 is fixedly connected to the inner side of the first adhesive layer 209, a second adhesive layer 211 is fixedly connected to the outer side of the intermediate layer 208, and an outer layer 212 is fixedly connected to the outer side of the second adhesive layer 211.

[0039] Furthermore, the intermediate layer 208 is an aluminized PET film, and the first adhesive layer 209 and the second adhesive layer 211 are hot melt adhesives.

[0040] Furthermore, the inner layer 210 is a PP film, and the outer layer 212 is a polyester fiber reinforced TPU film.

[0041] Through the design of a five-layer composite structure, the airtight bag body 201 achieves significant optimization in terms of waterproofness, tensile strength, and environmental adaptability. The aluminized PET film, as the middle layer 208, effectively enhances the sealing and preservation capabilities of the airtight bag body 201 through its excellent barrier properties. The PP film, as the inner layer 210, has good heat-sealing performance and chemical inertness, ensuring complete isolation between the contents and the external environment. The polyester fiber reinforced TPU film, as the outer layer 212, significantly enhances tensile strength, abrasion resistance, and tear resistance through the combination of high-molecular elastomer and high-strength fiber. At the same time, the flexibility of TPU allows the bag to maintain structural integrity under complex deformation. The hot melt adhesive, as the first adhesive layer 209 and the second adhesive layer 211, ensures a strong and stable composite structure between the layers through intermolecular penetration and curing, avoiding the risk of delamination or peeling. The overall structure combines high airtightness, high strength, weather resistance, and lightweight characteristics.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detachable airtight bag trolley case, comprising a first case body (1) and a second case body (7), wherein the first case body (1) and the second case body (7) are connected by a zipper, characterized in that: An airtight bag assembly (2) is fixedly installed inside the first box (1); The airtight bag assembly (2) includes an airtight bag body (201), and a plurality of elastic pull straps (8) are fixedly connected to the surface of the airtight bag body (201). The end of the elastic pull strap (8) away from the airtight bag body (201) is connected to the inner wall of the first box (1). The airtight bag body (201) includes an intermediate layer (208), a first adhesive layer (209) is fixedly connected to the inner side of the intermediate layer (208), an inner layer (210) is fixedly connected to the inner side of the first adhesive layer (209), a second adhesive layer (211) is fixedly connected to the outer side of the intermediate layer (208), and an outer layer (212) is fixedly connected to the outer side of the second adhesive layer (211).

2. The detachable airtight bag trolley case according to claim 1, characterized in that: Wheels (3) are fixedly installed on the left side of both the first box (1) and the second box (7).

3. The detachable airtight bag trolley case according to claim 2, characterized in that: The right side surface of the first housing (1) is provided with a telescopic rod (4).

4. The detachable airtight bag trolley case according to claim 3, characterized in that: The surface of the airtight bag body (201) is connected to a detachable zipper (203).

5. The detachable airtight bag trolley case according to claim 4, characterized in that: The outer side of the detachable zipper (203) is connected to a fixing cloth ring (202), which is sewn to the inner wall of the first box (1).

6. The detachable airtight bag trolley case according to claim 5, characterized in that: The front of the airtight bag body (201) is respectively equipped with a sealing zipper (204), a vacuum check valve (205) and a booster pull ring (206).

7. The detachable airtight bag trolley case according to claim 6, characterized in that: The airtight bag body (201) has a storage space (207) inside, the vacuum one-way valve (205) is connected to the storage space (207), and the sealing zipper (204) seals the storage space (207).

8. The detachable airtight bag trolley case according to claim 7, characterized in that: The first box (1) has four corners of the inner wall with fixed limit straps (6), and the limit straps (6) are fixed with buckles (5).

9. The detachable airtight bag trolley case according to claim 8, characterized in that: The intermediate layer (208) is an aluminized PET film, and the first adhesive layer (209) and the second adhesive layer (211) are hot melt adhesives.

10. The detachable airtight bag trolley case according to claim 9, characterized in that: The inner layer (210) is a PP film, and the outer layer (212) is a polyester fiber reinforced TPU film.

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