Packing box with two concave sides

Abstract

The utility model discloses a packing box with two sides recessed inwards, which comprises a bottom plate, four side plates and a locking structure, a left side plate and a right side plate are connected with folding plates, the locking structure comprises first inserting pieces connected to the left edge and the right edge of a front side plate and second inserting pieces connected to the left edge and the right edge of a rear side plate, the first inserting pieces are provided with first inserting seams, and the second inserting pieces are provided with second inserting seams. First folding pieces are connected to the left edge and the right edge of the front side plate, second folding pieces are connected to the left edge and the right edge of the rear side plate, grooves are formed in the lower edges of all the folding pieces, pressing plates are connected to the folding plates, and protruding pieces are connected to the front edges and the rear edges of the two pressing plates. The first inserting seams are inserted into the corresponding second inserting seams to form a mutual clamping structure, the folding plate and the pressing plate are turned over, and all the protruding pieces are inserted into the corresponding grooves. By means of the structure, the packaging box is not prone to scattering, and the stability of the whole structure of the packaging box is improved.

Description

Technical Field

[0001] The utility model relates to the field of paper box packaging, in particular to a packaging box with concave sides. Background Art

[0002] With the rapid development of society and the continuous improvement of people's living standards, corrugated paper boxes have become a common means of packaging in daily life. Corrugated paper boxes not only protect goods, facilitate storage and transportation, beautify goods, and promote goods, but are also green and environmentally friendly products.

[0003] Currently, the main locking method for corrugated paper boxes is to use a bottom opening and lock it with a combination of protruding pieces. Although this method has good stability, it requires a hole in the bottom of the box body, which affects the overall appearance of the box body. Utility Model Content

[0004] Based on this, in order to solve the above technical problems, the present invention provides a packaging box with concave sides.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A packaging box with concave sides, comprising a bottom plate and vertical front, rear, left and right panels connected to the edges of the bottom plate. The upper edges of the left and right panels are connected to folding panels. The packaging box also includes a locking structure, wherein the locking structure includes a first insert connected to the upper left and right edges of the front panel and extending backward, and a second insert connected to the upper left and right edges of the rear panel and extending forward. The rear portion of the first insert is provided with a first insertion slot, and the front portion of the second insert is provided with a slot that interlocks with the first insertion slot. The lower parts of the left and right edges of the front side panel are further connected to the first folding pieces that are attached to the inner surface of the front side panel, and the lower parts of the left and right edges of the rear side panel are further connected to the second folding pieces that are attached to the inner surface of the rear side panel. The lower edges of all the folding pieces have grooves, and the upper edge of the folding plate is connected to the pressing plate, and the front and rear edges of the two pressing plates are connected to convex pieces. During assembly, the first folding seam is inserted into the corresponding second folding seam to form a mutual locking structure, and the folding plate and the pressing plate are folded over to insert all the convex pieces into the corresponding grooves.

[0007] By adopting the above technical solution, the first insertion slot is inserted into the corresponding second insertion slot to form an interlocking structure, thereby fixing the front and rear side panels. At the same time, all the protrusions are inserted into the corresponding grooves to lock together, forming a slot-type locking structure, which makes the packaging box less likely to fall apart and improves the stability of the overall structure of the packaging box.

[0008] In a specific embodiment of the present invention, the distance between the outer edges of the two tabs in the width direction is slightly greater than the distance between the front and rear side panels. With this structure, since the distance between the outer edges of the two tabs in the width direction is slightly greater than the distance between the front and rear side panels, when the front and rear side panels are fixed, they exert a slight squeezing force on the two tabs in the width direction, thereby forming a locking structure between the tabs and the front and rear side panels.

[0009] In a specific implementation manner of the present utility model: notches are provided at both ends of the junction of the folding plate and the pressing plate.

[0010] In a specific embodiment of the present invention, the left and right panels each have a first fold line, which divides the left and right panels into a first adhesive sheet adhered to the bottom panel and a baffle. The folded packaging box formed with this structure has a more beautiful appearance.

[0011] In a specific embodiment of the present invention: the first insert has a second fold line, the second fold line divides the first insert into a second adhesive sheet pasted on the inner surface of the front side panel and a first movable sheet, the second insert has a third fold line, the third fold line divides the second insert into a third adhesive sheet pasted on the inner surface of the rear side panel and a second movable sheet, wherein the widths of the first adhesive sheet, the second adhesive sheet and the third adhesive sheet are equal.

[0012] In a specific embodiment of the present invention: the first folding piece has a fourth crease line, and the fourth crease line divides the first folding piece into a fourth adhesive piece and a third movable piece pasted on the inner surface of the front side panel; the second folding piece has a fifth crease line, and the fifth crease line divides the second folding piece into a fifth adhesive piece and a fourth movable piece pasted on the inner surface of the rear side panel.

[0013] In a specific implementation manner of the present utility model: the upper edge of the rear side plate is connected with a box cover for sealing the packaging box.

[0014] In a specific embodiment of the present invention, the upper, left and right edges of the box cover are connected with folding plates adhered to the inner surface of the box cover. With this structure, the entire packaging box is more stable and less prone to deformation after being formed.

[0015] In a specific embodiment of the present invention, the three folding plates are spliced to cover the entire inner side of the box cover. This structure makes the cross section of the folding plates invisible, thereby beautifying the interior of the packaging box.

[0016] In a specific embodiment of the present invention: the upper edge of the box cover is connected with an inserting tongue, the upper edge of the front side plate is connected with a wing plate, and the junction of the wing plate and the front side plate is provided with a socket that matches the inserting tongue.

[0017] The beneficial effects of the present invention are as follows: in the present invention, a mutual locking structure is formed by inserting the first insertion slot into the corresponding second insertion slot, thereby fixing the front and rear side panels. Since the distance between the outer edges of the two protruding pieces in the width direction is slightly larger than the distance between the front side panel and the rear side panel, when the front and rear side panels are fixed, they will exert a slight extrusion force on the two protruding pieces in the width direction, thereby prompting the protruding pieces to form a locking structure with the front and rear side panels. At the same time, all the protruding pieces are inserted into the corresponding grooves and locked to form a card slot type locking structure, which makes the packaging box not easy to fall apart and improves the stability of the overall structure of the packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a structural diagram of a packaging box with concave sides in the utility model;

[0020] Figure 2 This is a schematic structural diagram of the packaging box of the utility model when it is fully unfolded;

[0021] Figure 3 is showing all the plates tiled;

[0022] Figure 4 The left and right side panels, the two first inserting pieces and the two second inserting pieces are all folded upwards by 90 degrees.

[0023] Figure 5 It shows the folding plate and the pressing plate being folded over and all the tabs being inserted into the corresponding grooves;

[0024] Figure 6 It shows that after folding the box cover and the wing plate, the tongue is inserted into the socket;

[0025] Figure 7 yes Figure 5 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying 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.

[0027] See also Figure 1 and Figure 2As shown, the present invention is a packaging box with concave sides, which is composed of a bottom plate 10 and vertical front side plates 11, rear side plates 12, left side plates 13 and right side plates 14 connected to the edges of the bottom plate 10. The upper edges of the left side plate 13 and the right side plate 14 are connected to foldable plates 16.

[0028] like Figure 1 、 Figure 2 and Figure 4 As shown, the front and rear side panels also include a locking structure for locking and securing the four side panels. The locking structure includes a first tab 25 connected to the upper left and right edges of the front side panel 11 and extending rearward, and a second tab 26 connected to the upper left and right edges of the rear side panel 12 and extending forward. A first slot 27, opening downward, is provided at the rear of the first tab. A second slot 28, opening upward and interlocking with the first slot, is provided at the front of the second tab 26. Thus, by interlocking the first slot with the corresponding second slot, a locking structure is formed, securing the front and rear side panels. First flaps 20, which adhere to the inner surface of the front side panel, are also connected to the lower left and right edges of the front side panel 11. Second flaps 21, which adhere to the inner surface of the rear side panel, are also connected to the lower left and right edges of the rear side panel 12. The first and second flaps 20, 21 have identical structures. A groove 22 is provided on the lower edge of each flap. A pressure plate 23 is connected to the upper edge of each folding panel 16. The front and rear edges of the pressure plate 23 are each connected to an outwardly projecting tab 24. The widthwise distance between the outer edges of the two tabs 24 is slightly greater than the distance between the front and rear side panels 11, 12. During assembly, the folding plate and pressure plate are folded over, and all the tabs are inserted into corresponding grooves, thereby securing all the side panels. This way, when the front and rear side panels are secured, they exert a slight compressive force on the two tabs in the widthwise direction, forcing the tabs to form a locking structure with the front and rear side panels. Simultaneously, all the tabs engage in corresponding grooves, forming a slot-type locking mechanism, which increases the stability of the overall packaging box structure.

[0029] Such as 5 and Figure 7 As shown, in this embodiment, notches 17 are provided at both ends of the junction of the pressing plate 23 and the folding plate 16. With this structure, during assembly, the notches 17 can avoid the top wall of the corresponding groove, thereby reducing resistance and making the locking process smoother.

[0030] like Figure 1 and Figure 2 As shown, in this embodiment, both the left panel 13 and the right panel 14 have first fold lines 30. The two first fold lines 30 divide the left panel 13 and the right panel 14 into a first adhesive sheet 151 and a baffle 152, respectively, which are attached to the surface of the base panel 10. This folding structure makes the packaging box more aesthetically pleasing.

[0031] like Figure 2 and Figure 4 As shown, in this embodiment, the first inserting tab 25 has a second fold line 31. The second fold line 31 divides the first inserting tab 25 into a second adhesive tab 251 attached to the inner surface of the front panel 11 and a first movable tab 252. The second inserting tab 26 has a third fold line 32. This third fold line 32 divides the second inserting tab into a third adhesive tab 261 attached to the inner surface of the rear panel 12 and a second movable tab 262. The first adhesive tab 151, the second adhesive tab 251, and the third adhesive tab 261 have equal widths.

[0032] In this embodiment, the first flap 20 has a fourth crease line 33. This fourth crease line 33 divides the first flap 20 into a fourth adhesive flap 201 attached to the inner surface of the front panel 11 and a third movable flap 202. The second flap 21 has a fifth crease line 34. This fifth crease line 34 divides the second flap 21 into a fifth adhesive flap 211 attached to the inner surface of the rear panel 12 and a fourth movable flap 212.

[0033] A lid 9 for sealing the packaging box is connected to the upper edge of the rear side plate 12. Folding plates 8 are attached to the upper, left and right edges of the lid 9 and are pasted on the inner surface of the lid 9. With this structure, the entire packaging box is more stable and less prone to deformation after molding.

[0034] In the present invention, three folding plates 8 are spliced to cover the inner side of the box cover 9. With this structure, the cross section of the folding plate is not visible, thereby beautifying the interior of the packaging box.

[0035] The upper edge of the box cover 9 is connected with an inserting tongue 7. The upper edge of the front side plate 11 is connected with a wing plate 6. A socket 5 that cooperates with the inserting tongue 7 is provided at the junction of the wing plate 6 and the front side plate.

[0036] The packaging box is made of corrugated cardboard through die cutting, V-grooving and pre-gluing by box gluing equipment. When it needs to be stored or transported, all the boards of the packaging box can be laid flat to form a Figure 3 It can be laid flat in the middle, thus saving space and facilitating storage and transportation. Figure 4 The left and right panels are folded upwards by 90° along the corresponding first crease lines 30, the two first inserts 25 are folded upwards by 90° along the corresponding second crease lines 31, and the two second inserts 26 are folded upwards by 90° along the corresponding third crease lines 32. Figure 1 Fold the front side panel 11 and the rear side panel 12 upwards, and at the same time, insert the first insertion slot 27 into the corresponding second insertion slot 28. Figure 5 Fold the folding plate 16 and the pressing plate 23, and insert all the protruding pieces 24 into the corresponding grooves 22. Figure 6 Put the product into the packaging box, then fold the box cover 9 and the wing plate 6, and insert the tongue 7 into the socket 5, which is easy to operate.

[0037] In summary, in the present invention, the front and rear side panels are fixed by inserting the first insertion slot into the corresponding second insertion slot to form an interlocking structure. Since the distance between the outer edges of the two protruding pieces in the width direction is slightly larger than the distance between the front side panel and the rear side panel, when the front and rear side panels are fixed, a slight squeezing force is applied to the two protruding pieces in the width direction, thereby promoting the formation of a locking structure between the protruding pieces and the front and rear side panels. At the same time, all the protruding pieces are inserted into the corresponding grooves to engage, forming a card slot lock structure, which increases the stability of the overall structure of the packaging box.

[0038] The above describes an embodiment of the present invention in detail. However, the above content is only a preferred embodiment of the present invention and should not be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent application of the present invention.

Claims

1. A packaging box with concave sides, comprising a bottom plate and vertical front, rear, left, and right side plates connected to the edges of the bottom plate, wherein the upper edges of the left and right side plates are connected to foldable plates, and further comprising a locking structure, characterized in that: The locking structure includes a first plug-in piece extending backward and connected to the upper left and right edges of the front side panel, and a second plug-in piece extending forward and connected to the upper left and right edges of the rear side panel, the rear portion of the first plug-in piece is provided with a first insertion slot, and the front portion of the second plug-in piece is provided with a second insertion slot that interlocks with the first insertion slot, the lower left and right edges of the front side panel are further connected to the first folding piece that is attached to the inner surface of the front side panel, and the lower left and right edges of the rear side panel are further connected to the second folding piece that is attached to the inner surface of the rear side panel, the lower edges of all the folding pieces have a groove, the upper edge of the folding plate is connected to the pressing plate, and the front and rear edges of the two pressing plates are connected to the protruding pieces. During assembly, the first insertion slot is inserted into the corresponding second insertion slot to form an interlocking structure, the folding plate and the pressing plate are folded over, and all the protruding pieces are inserted into the corresponding grooves.

2. The double-sided concave packaging box according to claim 1, characterized in that: The distance between the outer edges of the two protruding pieces in the width direction is slightly larger than the distance between the front side plate and the rear side plate.

3. The double-sided concave packaging box according to claim 1, characterized in that: Notches are provided at both ends of the junction of the folding plate and the pressing plate.

4. The double-sided concave packaging box according to claim 1, characterized in that: The left side panel and the right side panel both have a first crease line, and the first crease line divides the left side panel and the right side panel into a first adhesive sheet and a baffle that are adhered to the surface of the bottom panel.

5. The packaging box with concave sides according to claim 4, characterized in that: The first insert has a second fold line, which divides the first insert into a second adhesive sheet adhered to the inner surface of the front side panel and a first movable sheet. The second insert has a third fold line, which divides the second insert into a third adhesive sheet adhered to the inner surface of the rear side panel and a second movable sheet, wherein the widths of the first adhesive sheet, the second adhesive sheet and the third adhesive sheet are equal.

6. The packaging box with concave sides according to claim 1, characterized in that: The first folding piece has a fourth folding line, which divides the first folding piece into a fourth adhesive piece and a third movable piece pasted on the inner surface of the front side panel. The second folding piece has a fifth folding line, which divides the second folding piece into a fifth adhesive piece and a fourth movable piece pasted on the inner surface of the rear side panel.

7. The packaging box with concave sides according to claim 1, characterized in that: The upper edge of the rear side plate is connected with a box cover for sealing the packaging box.

8. The packaging box with concave sides according to claim 7, characterized in that: The upper, left and right edges of the box cover are connected with folding plates which are pasted on the inner surface of the box cover.

9. The double-sided concave packaging box according to claim 8, characterized in that: The three folding plates are spliced to cover the entire inner side of the box cover.

10. The packaging box with concave sides according to claim 9, characterized in that: The upper edge of the box cover is connected with an inserting tongue, the upper edge of the front side plate is connected with a wing plate, and the junction of the wing plate and the front side plate is provided with a socket matched with the inserting tongue.

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