Vacuum heat preservation lunch box

Abstract

The utility model provides a vacuum heat preservation lunch box which comprises a box body and a box cover, the box body is composed of an outer box and an inner container, a double-layer structure is formed between the outer box and the inner container, a first vacuum layer is formed by an inner cavity of the outer box and the inner container through a vacuumizing device, the bottom of the outer box is punched to form a first reinforcing protruding rib protruding upwards, and the box cover is composed of an upper cover and a lower cover. A double-layer structure is formed between the upper cover and the lower cover, the inner cavity forms a second vacuum layer through the vacuumizing device, the bottom of the upper cover and the bottom of the lower cover form second reinforcing protruding ribs protruding upwards through stamping treatment, the bottom of the box body is provided with first reinforcing protruding ribs protruding upwards, and therefore the structure of the box body is firmer through the mode, and the service life of the box body is prolonged. The box cover is provided with a second reinforcing convex rib and a stamping groove, so that the structure of the box cover is firmer, the risk that the vacuum heat preservation lunch box is deformed due to high temperature can be effectively reduced in the mode, and the service life of the vacuum heat preservation lunch box is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of lunch box technology, specifically relating to a vacuum insulated lunch box. Background Technology

[0002] A lunchbox is a box specifically designed to hold food, also known as a bento box. Most are made of aluminum, stainless steel, or plastic. Most lunchboxes on the market are single-layered. However, hot food loses heat quickly when placed in the box, and single-layered boxes don't retain heat well. This can result in the box being too hot to handle before the food cools down. Currently, most insulated lunchboxes are made with a double-layered structure, filling the interlayer with foam plastic as insulation. Insulated lunchboxes reduce heat transfer, thus improving food insulation. Vacuum-insulated lunchboxes offer even stronger insulation, maintaining food temperature for longer than ordinary insulated lunchboxes. However, vacuum-insulated lunchboxes are generally made of welded stainless steel. Due to the vacuum layer, they are prone to bulging and deformation when containing hot food or undergoing high-temperature sterilization. Therefore, we propose a vacuum-insulated lunchbox with a more robust structure that reduces deformation caused by high temperatures. Utility Model Content

[0003] The purpose of this invention is to provide a vacuum insulated lunch box, which aims to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a vacuum insulated lunch box, comprising a box body and a lid. The box body is composed of an outer box and an inner liner. The surface of the inner liner is provided with a groove for holding food. The inner liner is disposed inside the outer box and is integrally formed with the outer box by welding. A double-layer structure is formed between the outer box and the inner liner, and the internal cavity forms a first vacuum layer through a vacuuming device. The bottom of the outer box is formed with an upwardly protruding first reinforcing rib by stamping. The lid is composed of an upper cover and a lower cover. The surface of the lower cover is formed with a stamping groove by stamping. The lower cover is fastened to the bottom of the upper cover and is integrally formed with the upper cover by welding. A double-layer structure is formed between the upper cover and the lower cover, and the internal cavity forms a second vacuum layer through a vacuuming device. The bottom of both the upper cover and the bottom of the lower cover are formed with upwardly protruding second reinforcing ribs by stamping. Fastening components for fixing the lid are installed on all four sides of the outer box.

[0005] As a preferred technical solution of this utility model, the fastening assembly includes a sleeve fixedly installed on the side of the outer box, and a U-shaped connector is rotatably installed inside the sleeve. Each of the two vertical sections of the connector is provided with a fastening part, and a connecting rod is integrally connected between the ends of the two fastening parts. When the connector is rotated to the vertical position, the fastening part fastens and fixes the box cover to the top of the box body.

[0006] As a preferred technical solution of this utility model, the top edge of the cover is provided with a fastening rib, the fastening part is bent, and when the connector is rotated to a vertical state, the fastening part is located at one end of the connecting rod and is obliquely downward, and the fastening part is fastened on the fastening rib.

[0007] As a preferred technical solution of this utility model, a snap-fit ​​groove is formed between the bottom edge of the lower cover and the outer wall of the stamping groove, and the box cover is snapped to the top of the box body through the snap-fit ​​groove and the bottom of the outer wall of the stamping groove abuts against the inner wall of the inner liner.

[0008] As a preferred technical solution of this utility model, the number of grooves is not less than two.

[0009] As a preferred technical solution of this utility model, the shape of the groove includes, but is not limited to, a circle, a square, a polygon, and an irregular shape.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: a first vacuum layer and a second vacuum layer are set in the middle layer between the box body and the lid, thereby giving the lunch box a good heat preservation effect. The bottom of the box body is provided with an upward first reinforcing rib, and the inner liner is provided with a downward groove for holding food. Therefore, the box body structure is more robust and the risk of deformation due to high temperature is reduced. The lid is made more robust by the second reinforcing rib and the stamping groove. Thus, the above methods can effectively reduce the risk of deformation of the vacuum insulated lunch box due to high temperature and improve the service life of the vacuum insulated lunch box. Attached Figure Description

[0011] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the box body in this utility model;

[0014] Figure 3 This is a schematic diagram of the disassembled structure of the box lid in this utility model;

[0015] Figure 4 This is a schematic diagram of the bottom structure of the lower cover in this utility model;

[0016] Figure 5 This is a schematic diagram of the fastening assembly in this utility model;

[0017] Figure 6This is a cross-sectional structural diagram of the present invention;

[0018] Figure 7 In this utility model Figure 6 Enlarged structural diagram at point A;

[0019] Figure 8 This is a schematic diagram of the inner liner in this utility model.

[0020] In the diagram: 1. Box body; 101. Outer box; 102. Inner liner; 103. Groove; 2. Box lid; 201. Top lid; 202. Bottom lid; 203. Stamping groove; 3. First vacuum layer; 4. First reinforcing rib; 5. Second vacuum layer; 6. Second reinforcing rib; 7. Fastening assembly; 701. Sleeve; 702. Connector; 703. Fastening part; 704. Connecting rod; 8. Fastening rib; 9. Fastening groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-7This utility model provides the following technical solution: a vacuum insulated lunch box, including a box body 1 and a lid 2. The box body 1 is composed of an outer box 101 and an inner liner 102. The surface of the inner liner 102 is provided with a groove 103 for holding food. The inner liner 102 is disposed inside the outer box 101 and is welded to the outer box 101 to form an integral structure. A double-layer structure is formed between the outer box 101 and the inner liner 102, and the internal cavity is formed by a vacuum pump to form a first vacuum layer 3. The bottom of the outer box 101 is stamped to form an upwardly protruding first reinforcing rib 4. The first reinforcing rib 4 can improve the structural strength of the outer box 101, and the groove 103 of the inner liner 102 can improve the structural strength. Therefore, after the outer box 101 and the inner liner 102 are welded to form an integral structure and a vacuum is drawn in the cavity of the double-layer structure, the structural strength of the box body 1 can be effectively improved by the above method. To reduce the risk of deformation of the box body 1 due to high temperature, the first box cover 2 is composed of an upper cover 201 and a lower cover 202. The surface of the lower cover 202 is stamped to form a stamping groove 203. The lower cover 202 is fastened to the bottom of the upper cover 201 and welded to the upper cover 201 to form an integral structure. A double-layer structure is formed between the upper cover 201 and the lower cover 202, and the internal cavity is formed into a second vacuum layer 5 by a vacuuming device. The bottom of the upper cover 201 and the bottom of the lower cover 202 are both stamped to form an upwardly protruding second reinforcing rib 6. The second reinforcing rib 6 can improve the structural strength of the upper cover 201 and the lower cover 202. Therefore, after vacuuming between the upper cover 201 and the lower cover 202, the second reinforcing rib 6 can reduce the risk of deformation of the box cover 2 due to high temperature. The four sides of the outer box 101 are equipped with fastening components 7 to fix the box cover 2.

[0023] In this embodiment, the fastening assembly 7 includes a sleeve 701 fixedly installed on the side of the outer box 101. A U-shaped connector 702 is rotatably installed inside the sleeve 701. Each of the two vertical sections of the connector 702 is provided with a fastening part 703. A connecting rod 704 is integrally connected between the ends of the two fastening parts 703. When the connector 702 is rotated to the vertical position, the fastening part 703 fastens and fixes the box cover 2 to the top of the box body 1.

[0024] Specifically, after the lid 2 is fastened to the top of the box body 1, the connector 702 is rotated so that the fastening part 703 fixes the lid 2. The connecting rod 704 can increase the fastening range of the fastening part 703, thereby fixing the lid 2 more effectively.

[0025] In this embodiment, the top edge of the cover 201 is provided with a fastening rib 8, and the fastening part 703 is bent. When the connector 702 is rotated to the vertical state, the fastening part 703 is located at one end of the connecting rod 704 and is obliquely downward. The fastening part 703 is fastened to the fastening rib 8.

[0026] Specifically, since the fastening part 703 is located at one end of the connecting rod 704 and is obliquely downward when the connector 702 is rotated to the vertical position, when the lid 2 is fastened to the top of the box body 1, the fastening part 703 can be fastened to the surface of the fastening rib 8 by rotating the connector 702. The obliquely downward structure of the fastening part 703 enables the fastening part 703 to effectively fix the lid 2, and the fastening rib 8 can also effectively improve the structural strength of the upper cover 201.

[0027] In this embodiment, a snap-fit ​​groove 9 is formed between the bottom edge of the lower cover 202 and the outer wall of the stamping groove 203. The box cover 2 is snapped onto the top of the box body 1 through the snap-fit ​​groove 9, and the bottom of the outer wall of the stamping groove 203 abuts against the inner wall of the inner liner 102.

[0028] Specifically, the snap-fit ​​groove 9 makes it easier for the lid 2 to be snapped onto the top of the box body 1. When the lid 2 is snapped onto, the outer wall of the stamping groove 203 at the bottom of the lid 2 will be in close contact with the inner wall of the inner liner 102, thereby improving the stability of the lid 2 being snapped onto the top of the box body 1. The snap-fit ​​part 703 can effectively fix the lid 2 to the top of the box body 1.

[0029] Please see Figure 8 In this embodiment, the number of grooves 103 is not less than two, and the shape of the grooves 103 includes, but is not limited to, circles, squares, polygons and irregular shapes.

[0030] Specifically, the above methods allow users to choose and purchase lunch boxes that suit their own needs.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A vacuum-insulated lunch box, comprising a box body (1) and a box lid (2), characterized in that: The box body (1) is composed of an outer box (101) and an inner liner (102). The surface of the inner liner (102) is provided with a groove (103) for holding food. The inner liner (102) is set inside the outer box (101) and is welded to the outer box (101) to form an integral structure. The outer box (101) and the inner liner (102) form a double-layer structure, and the internal cavity forms a first vacuum layer (3) through a vacuum pumping device. The bottom of the outer box (101) is stamped to form an upwardly protruding first reinforcing rib (4). The box lid (2) is composed of an upper lid (201) and a lower lid (202). The surface of the lower cover (202) is stamped to form a stamping groove (203). The lower cover (202) is fastened to the bottom of the upper cover (201) and is welded to form an integral structure with the upper cover (201). A double-layer structure is formed between the upper cover (201) and the lower cover (202), and the internal cavity is formed by a vacuum device to form a second vacuum layer (5). The bottom of the upper cover (201) and the bottom of the lower cover (202) are both stamped to form an upwardly protruding second reinforcing rib (6). The four sides of the outer box (101) are all equipped with fastening components (7) to fix the box cover (2).

2. The vacuum insulated lunch box according to claim 1, characterized in that: The fastening assembly (7) includes a sleeve (701) fixedly installed on the side of the outer box (101). A U-shaped connector (702) is rotatably installed inside the sleeve (701). Each of the two vertical sections of the connector (702) is provided with a fastening part (703). A connecting rod (704) is integrally connected between the ends of the two fastening parts (703). When the connector (702) is rotated to the vertical position, the fastening part (703) fastens and fixes the box cover (2) to the top of the box body (1).

3. A vacuum insulated lunch box according to claim 2, characterized in that: The top edge of the cover (201) is provided with a fastening rib (8), the fastening part (703) is bent, and when the connector (702) is rotated to the vertical state, the fastening part (703) is located at one end of the connecting rod (704) and is set obliquely downward. The fastening part (703) is fastened to the fastening rib (8).

4. A vacuum insulated lunch box according to claim 1, characterized in that: The bottom edge of the lower cover (202) forms a snap-fit ​​groove (9) between it and the outer wall of the stamping groove (203). The box cover (2) is snapped to the top of the box body (1) through the snap-fit ​​groove (9), and the bottom of the outer wall of the stamping groove (203) abuts against the inner wall of the inner liner (102).

5. A vacuum insulated lunch box according to claim 1, characterized in that: The number of grooves (103) is not less than two.

6. A vacuum insulated lunch box according to claim 1, characterized in that: The shape of the groove (103) includes, but is not limited to, circles, squares, polygons and irregular shapes.

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