Large plastic airtight packaging box

Abstract

The utility model discloses a large plastic airtight packaging box which structurally comprises a box body, a box cover and the like and is mainly characterized in that the box cover is composed of an outer cover and an inner cover, an outer edge which is bent and extends downwards is arranged on the outer circumference of the outer cover, and an inner edge which is bent and extends downwards is arranged on the outer circumference of the inner cover. The inner edge and the outer edge are connected through a groove piece integrally formed through injection molding so that the inner cover and the outer cover can form a whole. Meanwhile, the inner circumference of the top of the box body is provided with a convex groove piece integrally formed in an injection molding mode. Therefore, when the top of the box body is covered with the box cover, the groove piece can be positioned and tightly attached to the convex groove piece to form tight contact, that is, the groove piece is positioned and tightly attached to the convex groove piece to serve as a contact face to provide covering tight contact between the box cover and the box body, and the groove piece and the convex groove piece are independently formed through the injection molding technology. Therefore, when the sizes of the box body and the box cover are increased, errors cannot be increased along with the increase of the sizes, so that the flatness of a contact surface is ensured, and the air tightness of the packaging box is prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to an airtight packaging box, in particular to a large plastic airtight packaging box. Background Art

[0002] At present, when the lid of a large plastic airtight packaging box is closed on the top of the box body, the airtightness of the packaging box is mainly provided by the close contact of the contact surface between the lid and the box body. The contact surface is manufactured by rotational molding, that is, the box body or the lid is directly rotationally molded. With the increase in the application volume of the packaging box, the size of the box body and the lid also increases. However, the direct rotationally molded contact surface will bring about an increase in error as the size increases, which will cause deformation and unevenness of the contact surface, thereby failing to ensure close contact of the contact surface and affecting the airtightness of the packaging box. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a large plastic airtight packaging box with a box cover and a box body in close contact to avoid affecting the airtightness of the packaging box.

[0004] The technical problem of the utility model is achieved through the following technical solutions:

[0005] A large plastic airtight packaging box comprises a box body and a box cover on the top of the box body, wherein the box cover is composed of an outer cover and an inner cover, wherein the outer circumference of the outer cover is provided with an outer edge bent downward and extended, and the outer circumference of the inner cover is provided with an inner edge bent downward and extended, and the inner and outer edges are connected by an integrally-injected groove piece so that the inner and outer covers are integrated; the inner circumference of the top of the box body is provided with an integrally-injected convex groove piece; the box cover is closed on the top of the box body, and the groove piece is positioned to be tightly attached to the convex groove piece to form a close contact.

[0006] The groove piece is provided with a circle of inwardly concave positioning grooves, the convex groove piece is provided with a circle of outwardly convex positioning protrusions, the box cover is closed on the top of the box body, and the positioning protrusions are matched and fitted in the positioning grooves, thereby forming a positioning and close fit between the groove piece and the convex groove piece.

[0007] The convex groove piece is a "┓"-shaped piece composed of a top piece and a downwardly bent side piece. The top piece is injection-molded integrally with the inner circumference of the top of the box body, and a circle of outwardly convex positioning protrusions is provided on the top piece. The annular middle part enclosed by the side piece forms the box opening of the box body.

[0008] The two side surfaces and two end surfaces of the box body are provided with a plurality of alloy handles.

[0009] The two side surfaces and two end surfaces of the box body are provided with a plurality of "┳" shaped ribs, which are arranged equidistantly around the outer circumference of the box body, and the alloy handles are respectively arranged on both sides of the "┳" shaped ribs.

[0010] A chamfered arc surface is provided between the top surface of the box cover and the two side surfaces of the box cover, and a plurality of reinforcing transverse grooves are arranged equidistantly along the axial direction on the chamfered arc surface, and a "┻"-shaped rib for separation is provided between each two adjacent reinforcing transverse grooves.

[0011] The box cover is closed on the top of the box body, and the "┻"-shaped ribs and the "┳"-shaped ribs correspond to each other closely to form cross ribs.

[0012] A plurality of installation grooves are arranged between the box body and the box cover, each installation groove is provided with a lock, and the box body and the box cover are locked by the lock after being closed.

[0013] The top surface of the box cover is provided with a plurality of reinforcing long ribs, which are equidistantly arranged along the axial direction and parallel to each other.

[0014] Each of the reinforcing long ribs is formed by directly protruding upward from the top surface of the outer cover.

[0015] Compared with the prior art, the utility model mainly adopts an outer cover and an inner cover to form a box cover, and an outer edge bent downward and extended is provided on the outer circumference of the outer cover, and an inner edge bent downward and extended is provided on the outer circumference of the inner cover, and the inner and outer edges are connected by an injection-molded groove piece so that the inner and outer covers are integrated; at the same time, an injection-molded convex groove piece is provided on the inner circumference of the top of the box body; in this way, when the box cover is closed on the top of the box body, the groove piece can be positioned and tightly attached to the convex groove piece to form a close contact, that is, the groove piece is positioned and tightly attached to the convex groove piece as a contact surface to provide a close contact between the box cover and the box body, and the groove piece and the convex groove piece are both separately molded by the injection molding process, so when the size of the box body and the box cover increases, the error will not increase with the increase in size, thereby ensuring the flatness of the contact surface and avoiding affecting the air tightness of the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 for Figure 1 Bottom view of .

[0018] Figure 3 for Figure 1 Top view of the .

[0019] Figure 4 for Figure 3 A-A section view.

[0020] Figure 5 for Figure 4 Enlarged view of point B.

[0021] Figure 6 for Figure 5 Enlarged view of point C.

[0022] Figure 7 for Figure 1 Enlarged right view of .

[0023] Figure 8 for Figure 1 Stereoscopic view of the first view.

[0024] Fig. 9 for Figure 1 Second view of the stereogram. DETAILED DESCRIPTION

[0025] The embodiments of the present invention will be described in detail below according to the above-mentioned drawings.

[0026] like Figure 1 to Figure 9 As shown, 1. box body, 11. "┳"-shaped ribs, 12. box mouth, 2. box cover, 21. outer cover, 211. outer edge, 22. inner cover, 221. inner edge, 23. reinforced transverse groove, 24. "┻"-shaped ribs, 25. reinforced long ribs, 26. groove piece, 261. positioning groove, 27. convex groove piece, 271. top piece, 272. side piece, 273. positioning convex, 3. lock, 4. alloy handle, 5. installation groove.

[0027] A large plastic airtight packaging box, such as Figure 8 , Fig. 9 As shown, it is mainly used for the airtight storage of articles, and its structure includes a box body 1 and a box cover 2 on the top of the box body.

[0028] Among them, the box body 1 is made by rotational molding process, and the inner circumference of the top of the box body 1 is provided with a convex groove piece 27, and the convex groove piece is a "┓"-shaped piece composed of a top piece 271 and a downwardly bent side piece 272, and is injection-molded integrally with the inner circumference of the top of the box body 1 through the top piece 271. The annular middle part enclosed by the side piece 272 forms the box mouth 12 of the box body 1. The box mouth 12 of this embodiment is a conical mouth with a larger outside and a smaller inside, and the box mouth 12 is closed by a box cover 2 covered on the top of the box body 1.

[0029] The box cover 2 is composed of an outer cover 21 and an inner cover 22 made by a rotational molding process. The outer circumference of the outer cover 21 is provided with an outer edge 211 bent downward and extended, and the outer circumference of the inner cover 22 is provided with an inner edge 221 bent downward and extended. The inner and outer edges are connected by an injection-molded groove piece 26 to form the inner and outer covers as a whole.

[0030] The groove sheet 26 is provided with a circle of inwardly concave positioning grooves 261, and the convex groove sheet 27 is provided with a circle of outwardly convex positioning protrusions 273. Specifically, a circle of outwardly convex positioning protrusions 273 is provided on the top sheet 271. When the box cover 2 is closed on the top of the box body 1 and the positioning protrusions 273 are fitted in the positioning grooves 261, the groove sheet 26 and the convex groove sheet 27 can be positioned tightly, so that the groove sheet 26 and the convex groove sheet 27 are in close contact.

[0031] Obviously, since the groove piece 26 is positioned and tightly attached to the convex groove piece 27 as a contact surface to provide close contact between the box cover 2 and the box body 1, and the groove piece 26 and the convex groove piece 27 are both separately formed by the injection molding process, when the sizes of the box body 1 and the box cover 2 increase, the groove piece 26 and the convex groove piece 27 will not increase with the increase in size, thereby ensuring the flatness of the contact surface and avoiding affecting the airtightness of the packaging box.

[0032] At the same time, a number of "┳"-shaped ribs 11 are provided on the two side surfaces and the two end surfaces of the box body 1. The several "┳"-shaped ribs are equidistantly arranged around the outer circumference of the box body 1, and according to the size of the box body, alloy handles 4 are provided on both sides of some of the "┳"-shaped ribs 11. Therefore, the box body can be easily lifted or moved by these alloy handles 4 on the two side surfaces and the two end surfaces of the box body 1.

[0033] The top surface of the box cover 2 is provided with a plurality of reinforcing ribs 25 , which are equidistantly arranged along the axial direction and parallel to each other. Each reinforcing rib 25 is formed by directly protruding upward from the top surface of the outer cover 21 .

[0034] A chamfered arc surface is provided between the top surface of the box cover 2 and the two side surfaces of the box cover 2, and a plurality of reinforcing transverse grooves 23 are provided on the chamfered arc surface, and the plurality of reinforcing transverse grooves are equidistantly arranged along the axial direction, and a "┻"-shaped rib 24 is provided between each two adjacent reinforcing transverse grooves 23 for separation.

[0035] When the box cover 2 is closed on the top of the box body 1, the "┻"-shaped ribs 24 correspond exactly to the "┳"-shaped ribs 11 to form cross ribs. This design not only improves the appearance of the packaging box, but also makes the box body 1 and the box cover 2 have greater structural strength.

[0036] A plurality of mounting grooves 5 are provided between the box body 1 and the box cover 2. Figure 8 , Fig. 9 As shown, mounting grooves 5 are provided on both side surfaces and both end surfaces, and a plurality of mounting grooves are equidistantly arranged around the outer circumference of the packaging box. A lock 3 is installed in each mounting groove 5, and after the box cover 2 and the box body 1 are covered, the plurality of locks 3 can be used to lock the box cover 2 to prevent the box cover 2 from being accidentally opened. The lock 3 selected in this embodiment is a stainless steel butterfly lock with a beautiful and delicate appearance.

[0037] In addition, the installation position of the alloy handle 4 usually corresponds to the installation position of the lock 3. While ensuring the beautiful appearance, the installation groove 5 for installing the lock 3 is also connected to the concave surface on one side of the "┳"-shaped rib 11 to facilitate the operation and use of the alloy handle 4 and the lock 3.

[0038] The above description is only a specific embodiment of the present invention. Those skilled in the art should understand that any structural design equivalent to this embodiment should be included in the protection scope of the present invention.

Claims

1. A large plastic airtight packaging box, comprising a box body (1) and a box cover (2) on the top of the box body, characterized in that The box cover (2) is composed of an outer cover (21) and an inner cover (22); the outer circumference of the outer cover (21) is provided with an outer edge (211) bent downward and extending, and the outer circumference of the inner cover (22) is provided with an inner edge (221) bent downward and extending, and the inner and outer edges are connected by an integrally-injected groove piece (26) so that the inner and outer covers are integrated; the inner circumference of the top of the box body (1) is provided with an integrally-injected convex groove piece (27); the box cover (2) is closed on the top of the box body (1), and the groove piece (26) is positioned and tightly attached to the convex groove piece (27) to form a close contact.

2. A large plastic airtight packaging box according to claim 1, characterized in that The groove piece (26) is provided with a circle of inwardly concave positioning grooves (261), and the convex groove piece (27) is provided with a circle of outwardly convex positioning protrusions (273). The box cover (2) is covered on the top of the box body (1), and the positioning protrusions (273) are fitted in the positioning grooves (261), thereby forming a positioning and close fit between the groove piece (26) and the convex groove piece (27).

3. A large plastic airtight packaging box according to claim 1, characterized in that The convex groove piece (27) is a "┓"-shaped piece composed of a top piece (271) and a downwardly bent side piece (272). The top piece (271) is integrally injection-molded with the inner circumference of the top of the box body (1), and a circle of outwardly convex positioning protrusions (273) is provided on the top piece (271). The annular middle part enclosed by the side piece (272) forms the box opening (12) of the box body (1).

4. A large plastic airtight packaging box according to claim 1, characterized in that A plurality of alloy handles (4) are provided on both side surfaces of the box body (1) and both end surfaces of the box body (1).

5. A large plastic airtight packaging box according to claim 4, characterized in that The two side surfaces of the box body (1) and the two end surfaces of the box body (1) are provided with a plurality of "┳"-shaped ribs (11), the plurality of "┳"-shaped ribs are arranged at equal intervals around the outer circumference of the box body (1), and the alloy handles (4) are respectively arranged on both sides of the "┳"-shaped ribs (11).

6. A large plastic airtight packaging box according to claim 5, characterized in that A chamfered arc surface is provided between the top surface of the box cover (2) and the two side surfaces of the box cover (2), and a plurality of reinforcing transverse grooves (23) are provided on the chamfered arc surface and are equidistantly arranged along the axial direction, and a "┻"-shaped rib (24) for separation is provided between each two adjacent reinforcing transverse grooves.

7. A large plastic airtight packaging box according to claim 6, characterized in that The box cover (2) is covered on the top of the box body (1), and the "┻"-shaped ribs (24) and the "┳"-shaped ribs (11) correspond closely to each other to form cross ribs.

8. A large plastic airtight packaging box according to claim 1, characterized in that A plurality of installation grooves (5) are provided between the box body (1) and the box cover (2), each installation groove is provided with a lock (3), and the lock (3) locks the box body (1) and the box cover (2) when they are closed.

9. A large plastic airtight packaging box according to claim 1, characterized in that The top surface of the box cover (2) is provided with a plurality of reinforcing long ribs (25), and the plurality of reinforcing long ribs (25) are equidistantly arranged along the axial direction and are parallel to each other.

10. A large plastic airtight packaging box according to claim 9, characterized in that Each of the reinforcing long ribs (25) is formed by directly protruding upward from the top surface of the outer cover (21).

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