Smooth carton

Abstract

The utility model relates to the field of corrugated cartons, and discloses a flat carton which comprises a carton body and a carton cover. The box body is provided with a box opening, the box opening is composed of two wide edges and two long edges, the box cover comprises two first plate blocks, a second plate block and a third plate block, the two first plate blocks are symmetrically arranged and connected to the two wide edges of the box opening respectively, and the second plate block and the third plate block are connected to the two long edges of the box opening respectively; when the box cover covers the box opening, the first plate blocks, the second plate blocks and the third plate blocks are all bent towards the box body, the two first plate blocks are located on the two sides of the second plate blocks respectively and are combined on the box opening to form a first flat layer, gaps are formed between the first plate blocks and the first plate blocks and between the first plate blocks and the second plate blocks, and the third plate blocks completely cover the first flat layer. And the first flat layer is connected with the first plate and the second plate so as to form a second flat layer on the outer side of the first flat layer to seal the box opening. The flat carton can solve the problem of how to improve the flatness and the structural strength of the carton cover.

Description

Technical Field

[0001] The utility model relates to the field of corrugated paper boxes, in particular to a flat paper box. Background Art

[0002] Corrugated cardboard boxes are green and environmentally friendly products with superior performance and good processing properties. They have gradually replaced wooden boxes and other transport packaging containers, becoming the main force of transport packaging and being used in various fields. Traditional corrugated packaging cartons are usually rectangular structures, including a box body and a box cover. The box body has a box opening, which is composed of two wide sides and two long sides. The box cover includes two short boards arranged opposite to each other and two long boards arranged opposite to each other. The short boards are connected to the wide sides of the box body, and the long boards are connected to the long sides of the box body. When folding and sealing the box, the two short boards are first bent toward the box body, and the facing ends of the two short boards are abutted against each other to close the box opening. Then the two long boards are bent toward the box body, and the facing ends of the two long boards are abutted against each other, and the combination covers the two short boards. Finally, the two long boards are fixed by glue to achieve the closure of the carton.

[0003] However, during the actual folding process of corrugated packaging cartons, due to various factors in the production process (such as insufficient cutting accuracy, equipment wear errors, etc.), the combined length of the two short boards may be slightly greater than the length of the long side, which may cause the two short boards to overlap and stack on each other or arch out of the box after being bent toward the box body. When squeezed or impacted, the surface of the box cover may easily become uneven and deformed, thereby affecting the safety and integrity of the items in the box. Utility Model Content

[0004] (1) Technical problems solved

[0005] The utility model provides a flat carton, which can at least solve the technical problem of how to improve the flatness and structural strength of the box cover.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a flat carton, comprising a box body, the box body having a box opening, the box opening consisting of two wide sides and two long sides; the flat carton also includes:

[0008] The box cover includes a first plate, a second plate and a third plate. Two first plates are symmetrically provided and are respectively connected to the two wide sides of the box opening. The second plate and the third plate are respectively connected to the two long sides of the box opening.

[0009] Among them, when the box lid is closed on the box opening, the first plate, the second plate and the third plate are all bent toward the direction of the box body, the two first plates are respectively located on both sides of the second plate, and are combined with the second plate on the box opening to form a first flat layer. There are gaps between the two first plates and between the first plate and the second plate. The third plate completely covers the first flat layer and is connected to the first plate and the second plate to form a second flat layer on the outside of the first flat layer to close the box opening.

[0010] Furthermore, the box cover further comprises a reinforcing plate, the reinforcing plate and the second plate being connected to the same long side of the box body, the reinforcing plate being consistent in shape and size with the third plate;

[0011] When the box cover is closed on the box opening, the reinforcement plate is bent toward the box body to cover and connect the third plate, forming a third flat layer outside the second flat layer.

[0012] It is further provided that both sides of the aforementioned first plate and the free end of the second plate are connected to extension plates;

[0013] When the box cover is closed on the box opening, the extension plate is bent toward the box body and abuts against the inner side of the box body.

[0014] It is further provided that the flat carton further comprises an inner box body, which is sleeved within the box body and forms an annular channel with the box body;

[0015] When the box cover is closed on the box opening, the extension plate is inserted into the annular channel and contacts the box body and the inner box body surface respectively.

[0016] It is further provided that when the aforementioned box cover is closed on the box opening, the second plate and the two first plates are combined to form a first flat layer adapted to the box opening and close the box opening.

[0017] It is further provided that the aforementioned box body and box cover are formed by folding the same cardboard, and the box body includes a top plate, a front plate, a bottom plate and a back plate, which are connected end to end in sequence and enclosed to form two rectangular box openings.

[0018] It is further configured that when the aforementioned cardboard is unfolded, the two first panels of the box cover are connected to the front panel and the back panel respectively, the second panel is connected to the top panel or the bottom panel, and the third panel is connected to the bottom panel or the top panel.

[0019] (3) Beneficial effects

[0020] Compared with the prior art, the flat carton provided by the present invention has the following beneficial effects:

[0021] When sealing the flat carton provided by the present invention, first, the two first panels are bent toward the box body, and at the same time, the second panel is bent toward the box body, so that the two first panels and the second panel are combined to form a first flat layer on the box opening. Finally, the third panel is bent toward the box body so that the third panel completely covers the first flat layer, and at the same time, the third panel is connected to the first panel, and the third panel is connected to the second panel, so that the box opening can be closed and the box sealing is completed. It can be seen that in the process of sealing the flat carton, since there are gaps between the two first panels and between the first panel and the second panel, it can effectively avoid It avoids the two first plates, and the first plate and the second plate from overlapping and stacking with each other or arching out of the box, so that a flat first flat layer can be formed on the box opening, and the third plate is connected to the first plate and the second plate. The cooperation of the first plate and the second plate can make the third plate close to the first flat layer, so that a flat second flat layer is formed on the outside of the first flat layer. The flat first and second flat layers are stacked and connected, which can effectively improve the flatness and structural strength of the box cover, thereby improving the pressure resistance and impact resistance of the carton, making the carton less likely to deform, and ensuring the beautiful appearance of the carton. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional view of the flat carton before the box cover is folded in the embodiment;

[0023] Figure 2 This is a three-dimensional diagram of the flat carton in the embodiment when the box cover is folded to form the first flat layer;

[0024] Figure 3 This is a three-dimensional diagram of the box body, box cover and inner box body before folding in the embodiment;

[0025] Figure 4 It is a partial cross-sectional view of the folding and forming of the flat carton in the embodiment;

[0026] Figure 5 This is a plan view of the flat carton in the embodiment after it is fully unfolded.

[0027] Figure Number:

[0028] 1. Box body; 11. Box opening; 111. Wide side; 112. Long side; 12. Top plate; 13. Front plate; 14. Bottom plate; 15. Back plate;

[0029] 2. Box cover; 21. First plate; 22. Second plate; 23. Third plate; 24. Reinforcement plate; 25. Extension plate;

[0030] 3. First leveling layer; 4. Gap; 5. Second leveling layer; 6. Third leveling layer; 7. Inner box; 8. Annular channel. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] The utility model provides a flat carton, which is used to solve the problem of how to improve the flatness and structural strength of a box cover 2.

[0033] See Figure 1 and Figure 4 As shown, Figure 1 This is a three-dimensional diagram of the flat carton before the box cover 2 is folded in the embodiment. Figure 4 It is a partial cross-sectional view of the folded flat carton in the embodiment, and the flat carton includes a box body 1 and a box cover 2.

[0034] The box body 1 has a box opening 11 , which is composed of two wide sides 111 and two long sides 112 .

[0035] The box cover 2 includes a first plate 21, a second plate 22 and a third plate 23. There are two first plates 21 symmetrically distributed, and are respectively connected to the two wide sides 111 of the box opening 11 by integral connection or bonding. The second plate 22 and the third plate 23 are respectively connected to the two long sides 112 of the box opening 11 by integral connection or bonding.

[0036] Among them, when the box cover 2 is closed on the box opening 11, the first plate 21, the second plate 22 and the third plate 23 are all bent toward the box body 1, and the two first plates 21 are respectively located on both sides of the second plate 22, and are combined to form a first flat layer 3 on the box opening 11. There is a gap 4 between the two first plates 21 and between the first plate 21 and the second plate 22. The third plate 23 completely covers the first flat layer 3 and is connected to the first plate 21 and the second plate 22 to form a second flat layer 5 on the outside of the first flat layer 3 to close the box opening 11.

[0037] When sealing the flat carton provided by the above technical solution, first, the two first panels 21 are bent toward the box body 1, and at the same time, the second panel 22 is bent toward the box body 1, so that the two first panels 21 and the second panel 22 are combined to form a first flat layer 3 on the box opening 11. Finally, the third panel 23 is bent toward the box body 1, so that the third panel 23 completely covers the first flat layer 3. At the same time, the third panel 23 is connected to the first panel 21, and the third panel 23 is connected to the second panel 22, so that the box opening 11 can be closed and the sealing is completed. It can be seen that in the process of sealing the flat carton, since there are gaps 4 between the two first panels 21 and between the first panel 21 and the second panel 22, it can effectively avoid the two first panels 21 and the first panel 21 and the second panel 22 from overlapping and stacking or arching outward from the box body 1, so that a flat first flat layer 3 can be formed on the box opening 11, and the third panel 23 is connected to the first panel 21 and the second panel 22, wherein the two first panels 21 can limit the third panel 23 from being far away from the box opening 11. The wide side 111 of the box opening 11 and the second plate 22 can limit the third plate 23 from being far away from the long side 112 of the box opening 11. In this way, the cooperation between the first plate 21 and the second plate 22 can make the third plate 23 close to the first flat layer 3, thereby forming a flat second flat layer 5 on the outside of the first flat layer 3. The flat first flat layer 3 and the second flat layer 5 are stacked and connected, which can effectively improve the flatness and structural strength of the box cover 2, thereby improving the pressure resistance and impact resistance of the carton, making the carton less likely to deform, and ensuring the beautiful appearance of the carton.

[0038] In this embodiment, the number of the box openings 11 and the box covers 2 is the same and corresponds one to one.

[0039] See Figure 2 and Figure 4 As shown, Figure 2This is a three-dimensional diagram of the flattened carton in the embodiment, with the lid 2 folded to form the first flattened layer 3. In one embodiment of the lid 2, the lid 2 further includes a reinforcing plate 24. The reinforcing plate 24 and the second plate 22 are connected to the same long side 112 of the box body 1 by integral connection or bonding. The reinforcing plate 24 and the third plate 23 have the same shape and size. When the lid 2 is closed over the box opening 11, the reinforcing plate 24 bends toward the box body 1, covering and connecting the third plate 23, thereby forming a third flattened layer 6 outside the second flattened layer 5. In this way, when the flat carton is sealed, the third plate 23 is bent toward the box body 1 to form a flat second flat layer 5, and then the reinforcement plate 24 is bent toward the box body 1. The reinforcement plate 24 is tightly attached to the third plate 23, thereby forming a flat third flat layer 6 on the outside of the second flat layer 5. The flat first flat layer 3, the second flat layer 5 and the third flat layer 6 are stacked and connected, which can not only further enhance the flatness of the box cover 2, but also thicken the box cover 2, thereby improving the pressure resistance and impact resistance of the box cover 2, and further limiting the carton from being easily deformed.

[0040] Based on the above embodiment, a zipper portion (not shown) to be torn can be integrally provided on the reinforcing plate 24 or the box body 1, so that the carton can be opened by tearing the zipper portion, making unpacking more convenient. The zipper portion can be formed by punching holes at intervals on the cardboard.

[0041] See Figure 3 As shown, Figure 3 This is a perspective view of the box body 1, lid 2, and inner box body 7 before folding. In one embodiment of the first panel 21 and second panel 22, extension panels 25 are connected to both sides of the first panel 21 and the free end of the second panel 22. When the lid 2 is closed over the box opening 11, the extension panels 25 bend toward the box body 1 and abut against the inside of the box body 1. This extension panel 25 not only replaces glue to detachably connect the first flattening layer 3 and the box body 1, but also increases the contact area between the lid 2 and the box body 1, thereby enhancing the connection stability between the lid 2 and the box body 1 and the overall structural strength of the carton.

[0042] See Figure 3 As shown, the flat carton also includes an inner box body 7 of the same shape as the box body 1. The inner box body 7 is sleeved within the box body 1, forming an annular channel 8 between the inner box body 7 and the box body 1. When the box lid 2 is closed on the box opening 11, the extension plate 25 is inserted into the annular channel 8 and contacts the box body 1 and the inner box body 7 respectively. In this way, the inner box body 7 can further strengthen the structure of the carton, enhance the structural strength of the carton, thereby improving the carton's pressure resistance and impact resistance, and further preventing the carton from deforming.

[0043] See Figure 2As shown, in one embodiment of the first flat layer 3, when the box lid 2 is closed over the box opening 11, the second panel 22 and the two first panels 21 combine to form the first flat layer 3 that adapts to the box opening 11 and seals the box opening 11. Thus, after the second panel 22 and the two first panels 21 combine to form the first flat layer 3 that seals the box opening 11, the third panel 23 forms the second flat layer 5, which double seals the box opening 11 with the first flat layer 3, thereby improving the sealing performance of the flat carton.

[0044] See Figure 5 As shown, Figure 5 This is a plan view of the fully unfolded flattened carton in the embodiment. In one embodiment of the box body 1 and the box cover 2, the box body 1 and the box cover 2 are folded from the same cardboard. The box body 1 includes a top panel 12, a front panel 13, a bottom panel 14, and a back panel 15. The top panel 12, the front panel 13, the bottom panel 14, and the back panel 15 are connected end to end to form two rectangular box openings 11. In this way, the box body 1 and the box cover 2 can be cut and folded from the same cardboard, which is convenient for production.

[0045] See Figure 3 As shown, based on the combination of the above two embodiments, the inner box body 7 is also composed of four panels, which are respectively distributed in parallel on the inner sides of the top plate 12, the front plate 13, the bottom plate 14 and the rear plate 15. The four panels are connected in sequence, but the head and tail ends can be connected by plugging or abutting to facilitate unpacking.

[0046] See Figure 5 As shown, based on the above-mentioned box body 1 including the top panel 12, front panel 13, bottom panel 14 and back panel 15, when the cardboard is unfolded, the two first panels 21 of the box cover 2 are respectively connected to the front panel 13 and the back panel 15, the second panel 22 is connected to the top panel 12 or the bottom panel 14, and the third panel 23 is connected to the bottom panel 14 or the top panel 12; when the cardboard is folded and formed, the upper and lower sides of the first panel 21 are respectively abutted against the top panel 12 and the bottom panel 14, and the second panel 22 is abutted against the bottom panel 14 or the top panel 12. In this way, the first flat layer 3 formed by the first panel 21 and the second panel 22 can support the inner wall of the box opening 11, thereby limiting the shape of the carton and improving the structural strength of the carton, thereby improving the carton's pressure resistance and impact resistance, and making the carton less likely to deform.

[0047] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flat carton, comprising a box body, the box body having a box opening, the box opening consisting of two wide sides and two long sides; characterized in that: The flat carton also includes: The box cover comprises a first plate, a second plate and a third plate, wherein two first plates are symmetrically provided and respectively connected to the two wide sides of the box opening, and the second plate and the third plate are respectively connected to the two long sides of the box opening; When the box cover is closed on the box opening, the first plate, the second plate and the third plate are all bent toward the direction of the box body, and the two first plates are respectively located on both sides of the second plate, and are combined with the second plate to form a first flat layer on the box opening. There are gaps between the two first plates and between the first plate and the second plate. The third plate completely covers the first flat layer and is connected to the first plate and the second plate to form a second flat layer on the outside of the first flat layer to close the box opening.

2. A flat carton according to claim 1, characterized in that: The box cover further comprises a reinforcing plate, wherein the reinforcing plate and the second plate are connected to the same long side of the box body, and the reinforcing plate is consistent in shape and size with the third plate; When the box cover is closed on the box opening, the reinforcement plate is bent toward the box body to cover and connect the third plate, forming a third flat layer outside the second flat layer.

3. A flat carton according to claim 1, characterized in that: Both sides of the first plate and the free end of the second plate are connected with extension plates; When the box cover is closed on the box opening, the extension plate is bent toward the box body and abuts against the inner side of the box body.

4. A flat carton according to claim 3, characterized in that: It also includes an inner box body, the inner box body is sleeved in the box body, and forms an annular channel between the inner box body and the box body; When the box cover is closed on the box opening, the extension plate is inserted into the annular channel and contacts the box body and the inner box body surface respectively.

5. A flat carton according to claim 1, characterized in that: When the box cover is closed on the box opening, the second plate and the two first plates are combined to form the first flat layer adapted to the box opening and close the box opening.

6. A flat carton according to claim 1, characterized in that: The box body and the box cover are formed by folding the same cardboard. The box body includes a top plate, a front plate, a bottom plate and a back plate. The top plate, the front plate, the bottom plate and the back plate are connected end to end in sequence and enclose two rectangular box openings.

7. A flat carton according to claim 6, characterized in that: When the paperboard is unfolded, the two first panels of the box cover are connected to the front panel and the back panel respectively, the second panel is connected to the top panel or the bottom panel, and the third panel is connected to the bottom panel or the top panel.

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