Packaging box

Abstract

The invention relates to the technical field of product packaging, and discloses a packaging box which comprises a box body, a first cover plate and a second cover plate, the box body is provided with a first opening, the first opening is provided with a first edge and a second edge, the first edge and the second edge are adjacent and flush, the first cover plate is arranged on the first edge and provided with a groove position, and the second cover plate is arranged on the second edge and provided with a groove position. The second cover plate is matched with the groove position, based on the fact that the packaging box is in the closed state, the first cover plate is folded towards the interior of the packaging box along the first edge, the second cover plate is folded towards the interior of the packaging box along the second edge to the groove position, and the first cover plate and the second cover plate are matched to form an inner-layer cover plate covering the first opening. According to the packaging box, the first cover plate and the second cover plate are designed and matched to form the inner-layer cover plate covering the first opening, so that the number of layers of the cover plates of the first opening is reduced, the packaging thickness of the top of the packaging box is reduced, the number of layers of gaps generated during deformation is also reduced, and the overall attractiveness of the packaging box is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of product packaging, and in particular to a packaging box. Background Art

[0002] Full-cover self-locking packaging boxes are widely used in product packaging. The bottom of this type of packaging box is a locking structure with strong load-bearing capacity, and the top of the box is equipped with a buckle structure to facilitate locking the box cover and facilitate user unpacking operations.

[0003] The top opening of this type of packaging box is designed with three layers of cover plates stacked in sequence. The three layers of cover plates cooperate to achieve sealing of the top opening. On the one hand, the three layers of cover plates increase the packaging thickness at the top of the packaging box. On the other hand, when the packaging box is deformed by external force, the outermost cover plate and the middle cover plate of the packaging box will arch and deform accordingly, resulting in two layers of gaps when viewed from the side, affecting the overall appearance. Summary of the invention

[0004] In view of this, the present invention provides a packaging box to solve the problem that the top opening of the existing packaging box is designed with three layers of cover plates stacked in sequence, which increases the packaging thickness at the top of the packaging box. When the packaging box is deformed by external force, the outermost cover plate and the middle cover plate of the packaging box will arch and deform accordingly, resulting in two layers of gaps when viewed from the side, affecting the overall appearance.

[0005] A first aspect of the present invention provides a packaging box, comprising a box body, a first cover plate and a second cover plate, the box body having a first opening, the first opening having a first edge and a second edge, the first edge and the second edge being adjacent and flush with each other, the first cover plate being arranged on the first edge, the first cover plate being provided with a slot, the second cover plate being arranged on the second edge, the second cover plate matching the slot, based on the packaging box being in a closed state, the first cover plate being folded along the first edge toward the interior of the packaging box, the second cover plate being folded along the second edge toward the interior of the packaging box to the slot, the first cover plate and the second cover plate cooperating to form an inner cover plate covering the first opening.

[0006] Beneficial effect: by making the first edge and the second edge flush, and setting a slot on the first cover plate that can match the second cover plate, when the packaging box is in a closed state, the first cover plate is folded along the first edge toward the inside of the packaging box, and the second cover plate is folded along the second edge toward the inside of the packaging box to the slot, so that the first cover plate and the second cover plate cooperate to form an inner cover plate covering the first opening. The present application designs the first cover plate and the second cover plate so that the two cooperate to form an inner cover plate covering the first opening, thereby reducing the number of cover plate layers of the first opening, reducing the packaging thickness at the top of the packaging box, and also reducing the number of gap layers generated during deformation, thereby improving the overall aesthetics of the packaging box.

[0007] In some embodiments, the first opening also has a third side, the third side is opposite to the first side, the second side is arranged between the third side and the first side, the packaging box also includes a third cover, the third cover is arranged on the third side, based on the packaging box being in a closed state, the third cover is folded along the third side toward the inside of the packaging box to form an outer cover covering the first opening.

[0008] Beneficial effect: By providing a third cover plate, when the packaging box is in a closed state, the third cover plate is folded along the third edge toward the inside of the packaging box to form an outer cover plate covering the first opening, thereby further sealing the first opening and enhancing the sealing reliability of the packaging box.

[0009] In some embodiments, the corners where the third cover plate cooperates with the first edge and the second edge are chamfered.

[0010] Beneficial effect: By setting the corners where the third cover plate and the first edge cooperate to be chamfered, the chamfer smoothes the sharp corners of the third cover plate. When the user disassembles and assembles the packaging box, the chamfer can avoid scratching the user, thereby improving the safety of the packaging box.

[0011] In some embodiments, a distance a from a side edge of the second cover plate facing the first side to the first side is greater than or equal to a radius R of the rounded corner.

[0012] Beneficial effect: By setting the distance a from the side edge of the second cover plate toward the first side to the first side to be greater than or equal to the radius R of the chamfer, it is possible to avoid the fitting gap between the second cover plate and the first cover plate from being exposed, thereby improving the overall aesthetics of the packaging box and playing a dust-proof role, thereby preventing dust and other foreign matter from entering the interior of the packaging box through the gap and contaminating the product.

[0013] In some embodiments, the third cover plate is provided with an inserting piece, and a slot is provided at the connection between the first cover plate and the first side, and the inserting piece can be inserted into the slot and extend into the interior of the box body.

[0014] Beneficial effect: By arranging an insert on the third cover plate and a slot at the connection between the first cover plate and the first side, when the third cover plate is covered on the first opening, the insert is driven to insert into the slot and extend into the interior of the box body, thereby improving the stability of the third cover plate covering the first opening.

[0015] In some embodiments, the length A1 of the insert gradually decreases in a direction away from the third cover plate.

[0016] Beneficial effect: Further in the direction away from the third cover plate, the length A1 of the insert is set to gradually decrease. When the insert is inserted into the slot, the insert with a gradually changing length is more convenient to insert into the slot, thereby reducing the difficulty of inserting the insert and facilitating user operation.

[0017] In some embodiments, the slot has a first slot and a second slot connected to each other, the second slot is located on both sides of the first slot, the width D1 of the first slot is greater than the thickness d1 of the insert, and the width D2 of the second slot is less than or equal to the thickness d1 of the insert.

[0018] Beneficial effect: by setting the slot to be a first slot and a second slot that are connected, when the plug is inserted into the slot, the plug is first inserted into the first slot. Since the width D1 of the first slot is greater than the thickness d1 of the plug, the plug can be inserted into the first slot more easily. When the plug is gradually inserted into the second slot, since the width D2 of the second slot is less than or equal to the thickness d1 of the plug, the plug is snapped into the second slot to achieve snap-on fixation. Therefore, by setting the slot, it is possible to facilitate the insertion of the plug into the slot, ensure the plug-in stability of the plug, and prevent the plug from falling out of the slot.

[0019] In some embodiments, the length B1 of the slot is greater than the length A1 of the insert.

[0020] Beneficial effect: By setting the length of the slot to be greater than the length of the insert, it can be ensured that the insert is inserted into the slot, and the length margin of the slot can also avoid the situation where the insert is difficult to insert into the slot due to processing errors.

[0021] In some embodiments, the length of the slot B1=A1+2 mm.

[0022] Beneficial effect: By reasonably setting the length of the slot and the length of the insert, it can be ensured that the insert is inserted into the slot, while it can be avoided that the length of the slot is set too long to cause unsightly appearance and the existence of gaps.

[0023] In some embodiments, the plug is provided with a plug hole, and the box body is provided with an insert tongue at a position corresponding to the plug, and the insert tongue can be inserted into the plug hole and extend between the third cover plate and the first cover plate.

[0024] Beneficial effect: After the plug is inserted into the slot, the plug tongue is further inserted into the plug hole and extends between the third cover plate and the first cover plate. The plug tongue can limit and lock the plug to prevent the plug from falling out of the slot, thereby improving the stability of the plug in the slot.

[0025] In some embodiments, the length A2 of the inserting tongue gradually decreases in a direction away from the box body.

[0026] Beneficial effect: Further in the direction away from the box body, the length A2 of the plug tongue is set to gradually decrease. When the plug tongue is inserted into the socket, the plug tongue with a gradually changing length size is more conducive to inserting into the socket, reducing the difficulty of inserting the plug tongue and facilitating user operation.

[0027] In some embodiments, the insertion hole has a third insertion slot and a fourth insertion slot connected to each other, the fourth insertion slot is located on both sides of the third insertion slot, the width D3 of the third insertion slot is greater than the thickness d2 of the insertion tongue, and the width D4 of the fourth insertion slot is less than or equal to the thickness d2 of the insertion tongue.

[0028] Beneficial effect: by setting the jack as the third and fourth slots that are connected, when the tongue is inserted into the jack, the tongue is first inserted into the third slot, and since the width D3 of the third slot is greater than the thickness d2 of the tongue, the tongue can be inserted into the third slot more easily. When the tongue is gradually inserted into the fourth slot, since the width D4 of the fourth slot is less than or equal to the thickness d2 of the tongue, the tongue is engaged with the fourth slot to achieve engagement and fixation. Therefore, by setting the jack, it is possible to facilitate the insertion of the tongue into the slot, ensure the plugging stability of the tongue, and prevent the tongue from falling out of the jack.

[0029] In some embodiments, the length B2 of the insertion hole is greater than the length A2 of the insertion tongue.

[0030] Beneficial effect: By setting the length of the jack to be greater than the length of the tongue, it can be ensured that the tongue is inserted into the jack, and the length margin of the jack can also avoid the situation where the tongue is difficult to insert into the jack due to processing errors.

[0031] In some embodiments, the length of the jack is B2=A2+2 mm.

[0032] Beneficial effect: By reasonably setting the length of the jack and the length of the tongue, it can be ensured that the tongue is inserted into the jack, while it can be avoided that the length of the jack is set too long to cause unsightly appearance and the existence of gaps.

[0033] In some embodiments, the box body also has a second opening, the second opening is opposite to the first opening, the second opening is provided with a fourth side, a fifth side and a sixth side, the fourth side is opposite to the fifth side, and the sixth side is located between the fourth side and the fifth side, the packaging box also includes a fourth cover plate, a fifth cover plate and a sixth cover plate, the fourth cover plate is arranged on the fourth side, the fifth cover plate is arranged on the fifth side, and the sixth cover plate is arranged on the sixth side, the fourth cover plate, the fifth cover plate and the sixth cover plate are mutually snap-fitted and covered on the second opening, wherein the fourth cover plate is located in the innermost layer, the fifth cover plate is located in the outermost layer, and the sixth cover plate is located between the fourth cover plate and the fifth cover plate.

[0034] Beneficial effect: By setting the fourth side, the fifth side and the sixth side on the second opening, the fourth cover plate, the fifth cover plate and the sixth cover plate are respectively set on the fourth side, the fifth side and the sixth side, and the fourth cover plate, the fifth cover plate and the sixth cover plate are mutually snap-fitted and covered on the second opening, the second opening can be shielded and sealed, thereby ensuring the sealing of the packaging box.

[0035] In some embodiments, the fourth cover plate has a first mating edge, one end of the first mating edge is arranged between the fourth side and the sixth side, and the other end of the first mating edge extends toward the fifth side, the sixth cover plate has a second mating edge, one end of the second mating edge is arranged between the fourth side and the sixth side, and the other end of the second mating edge extends toward the interior of the box body, the second mating edge protrudes toward the fourth side, the first mating edge is located between the sixth side and the second mating edge, and the second mating edge is located between the first mating edge and the fourth side.

[0036] Beneficial effect: By arranging the second mating edge to protrude toward the fourth edge, and the first mating edge is located between the sixth edge and the second mating edge, and the second mating edge is located between the first mating edge and the fourth edge, the first mating edge and the second mating edge are staggered to reduce the corner mating gap between the first mating edge and the second mating edge, thereby avoiding the corner mating gap being too large and causing the product inside the packaging box to be exposed.

[0037] In some embodiments, the second mating edge is an arc edge, and an included angle α between the arc tangent at one end of the second mating edge and the sixth edge is 45° to 90°.

[0038] Beneficial effect: By setting the angle α between the arc tangent at one end of the second mating edge and the sixth edge within a reasonable range, the curvature of the second mating edge protruding toward the fourth edge can be controlled to minimize material usage while ensuring that the corner mating gap between the first mating edge and the second mating edge is reduced.

[0039] In some embodiments, an angle β between a line from one end to the other end of the second mating edge and the sixth side is 30° to 50°.

[0040] Beneficial effect: By setting the angle β between the line from one end to the other end of the second mating edge and the sixth side within a reasonable range, the position of the second mating edge can be controlled at a suitable position to ensure that the corner mating gap between the first mating edge and the second mating edge can be reduced.

[0041] In some embodiments, the first mating edge includes a first edge segment and a second edge segment connected to each other, the first edge segment is close to the connection between the fourth edge and the sixth edge, and the first edge segment abuts against the sixth edge, and the second edge segment and the sixth edge are gap-fitted.

[0042] Beneficial effect: By setting the first mating edge to include a first edge segment and a second edge segment connected to each other, the first edge segment abuts against the sixth edge to seal the corner gap between the fourth edge and the sixth edge, and the clearance between the second edge segment and the sixth edge can avoid contact friction between the second edge segment and the sixth edge, which is beneficial to the operation of the fourth cover plate covering the second opening.

[0043] In some embodiments, the fifth cover plate has a third mating edge, one end of the third mating edge is arranged between the fifth side and the sixth side, and the other end of the third mating edge extends toward the interior of the box body, the sixth cover plate has a fourth mating edge, one end of the fourth mating edge is arranged between the fifth side and the sixth side, the third mating edge is located between the sixth side and the fourth mating edge, and the fourth mating edge is located between the third mating edge and the fifth side.

[0044] Beneficial effect: By arranging the third mating edge between the sixth side and the fourth mating edge, and the fourth mating edge between the third mating edge and the fifth side, the third mating edge and the fourth mating edge are staggered to reduce the corner mating gap between the third mating edge and the fourth mating edge, thereby avoiding the corner mating gap being too large and causing the product inside the packaging box to be exposed.

[0045] In some embodiments, the fourth mating edge includes a third edge segment and a fourth edge segment connected to each other, the third edge segment is close to the connection between the fifth edge and the sixth edge, and the third edge segment abuts the fifth edge, and the fourth edge segment and the fifth edge are loosely matched.

[0046] Beneficial effect: By setting the fourth mating edge to include a third edge segment and a fourth edge segment connected to each other, the third edge segment abuts against the fifth edge to seal the corner gap between the fifth edge and the sixth edge, and the clearance fit between the fourth edge segment and the fifth edge can avoid contact friction between the fourth edge segment and the fifth edge, which is beneficial to the operation of the sixth cover plate covering the second opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A schematic diagram of the three-dimensional structure of a packaging box along a first direction according to an embodiment of the present invention is shown;

[0049] Figure 2 A schematic diagram of the three-dimensional structure of a packaging box along a second direction according to an embodiment of the present invention is shown;

[0050] Figure 3 A schematic diagram showing the structure of the cooperation between the first cover plate and the second cover plate in a packaging box according to an embodiment of the present invention;

[0051] Figure 4 A schematic diagram of the unfolded structure of a packaging box according to an embodiment of the present invention is shown;

[0052] Figure 5 A top view showing a packaging box in a closed state according to an embodiment of the present invention is shown;

[0053] Figure 6 A schematic diagram of the bottom structure of a packaging box in a closed state according to an embodiment of the present invention is shown.

[0054] Description of reference numerals:

[0055] 1. Box body; 11. First opening; 111. First side; 112. Second side; 113. Third side; 12. Slot; 121. First insertion slot; 122. Second insertion slot; 13. Insertion tongue; 14. Fourth side; 15. Fifth side; 16. Sixth side;

[0056] 2. first cover plate; 21. slot;

[0057] 3. The second cover plate;

[0058] 4. third cover plate; 41. rounded corner; 42. insert; 421. insert hole; 4211. third insert slot; 4212. fourth insert slot;

[0059] 5. fourth cover plate; 51. first mating edge; 511. first edge section; 512. second edge section;

[0060] 6. fifth cover plate; 61. third mating edge;

[0061] 7. Sixth cover plate; 71. Second mating edge; 72. Fourth mating edge; 721. Third edge segment; 722. Fourth edge segment. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 those skilled in the art without creative work are within the scope of protection of the present invention.

[0063] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0066] Combine the following Figures 1 to 6 , describing an embodiment of the present invention.

[0067] like Figures 1 to 3As shown, according to an embodiment of the present invention, on the one hand, a packaging box is disclosed, including a box body 1, a first cover plate 2 and a second cover plate 3, wherein the box body 1 has a first opening 11, the first opening 11 has a first edge 111 and a second edge 112, the first edge 111 and the second edge 112 are adjacent and arranged flush, the first cover plate 2 is arranged on the first edge 111, the first cover plate 2 is provided with a slot 21, the second cover plate 3 is arranged on the second edge 112, the second cover plate 3 and the slot 21 match, based on the packaging box being in a closed state, the first cover plate 2 is folded along the first edge 111 toward the inside of the packaging box, the second cover plate 3 is folded along the second edge 112 toward the inside of the packaging box to the slot 21, the first cover plate 2 and the second cover plate 3 cooperate to form an inner cover plate covering the first opening 11.

[0068] The packaging box of the present application is designed by making the first edge 111 flush with the second setting, and setting a groove 21 on the first cover plate 2 that can match the second cover plate 3. When the packaging box is in a closed state, the first cover plate 2 is folded along the first edge 111 toward the inside of the packaging box, and the second cover plate 3 is folded along the second edge 112 toward the inside of the packaging box to the groove 21, so that the first cover plate 2 and the second cover plate 3 cooperate to form an inner cover plate covering the first opening 11. The present application designs the first cover plate 2 and the second cover plate 3 so that the two cooperate to form an inner cover plate covering the first opening 11, thereby reducing the number of cover plate layers of the first opening 11, reducing the packaging thickness at the top of the packaging box, and also reducing the number of gap layers generated during deformation, thereby improving the overall aesthetics of the packaging box.

[0069] Preferably, the matching area of ​​the first cover plate 2 and the second cover plate 3 is equal to the opening area of ​​the first opening 11, so that the first cover plate 2 and the second cover plate 3 can just completely cover the first opening 11 to ensure the sealing of the product in the packaging box.

[0070] As for the specific shape, the packaging box can be circular, oval or geometric, and can be set as needed. In this embodiment, the packaging box is a square box body 1 as an example for description.

[0071] Since the packaging box is a square box body 1, the first opening 11 is also set to be a square opening.

[0072] Correspondingly, the overall shape of the first cover plate 2 and the second cover plate 3 matches the shape of the first opening 11. For example, when the first opening 11 is a circular opening, the overall shape of the first cover plate 2 and the second cover plate 3 is circular; when the first opening 11 is a geometric opening, the overall shape of the first cover plate 2 and the second cover plate 3 is geometric.

[0073] In this embodiment, since the first opening 11 is a square opening, the overall shape of the first cover plate 2 and the second cover plate 3 is a square.

[0074] Optionally, the shape of the slot 21 matches the shape of the second cover plate 3 and can be set to be semicircular, square, etc. In this embodiment, the slot 21 and the second cover plate 3 are both set to be semicircular as an example for description, but it is not limited to this.

[0075] In terms of the number of arrangements, one first edge 111 is arranged along the first opening 11, and two second edges 112 are arranged along the second opening and are arranged respectively on both sides of the first edge 111. Therefore, in this embodiment, the first cover plate 2 is provided with a slot 21 on one side facing the second edge 112, and a total of two slots 21 are provided, and the second cover plate 3 is also provided with two slots 21 and is respectively arranged corresponding to the two second edges 112, and the two second cover plates 3 are matched with the two slots 21 one by one.

[0076] It can be understood that in order to improve stability, a folded edge (not shown in the figure) is provided on the side of the first cover plate 2 away from the first edge 111, and the folded edge can be inserted into the interior of the box body 1 and abut against the inner wall of the box body 1, thereby ensuring the stability and reliability of the first cover plate 2 covering the first opening 11.

[0077] like Figure 1 As shown, in some embodiments, the first opening 11 also has a third edge 113, the third edge 113 is opposite to the first edge 111, and a second edge 112 is provided between the third edge 113 and the first edge 111, and the packaging box also includes a third cover plate 4, and the third cover plate 4 is arranged on the third edge 113. Based on the packaging box being in a closed state, the third cover plate 4 is folded along the third edge 113 toward the inside of the packaging box to form an outer cover plate covering the first opening 11.

[0078] By providing the third cover plate 4, when the packaging box is in a closed state, the third cover plate 4 is folded along the third edge 113 toward the inside of the packaging box to form an outer cover plate covering the first opening 11, thereby further sealing the first opening 11 and enhancing the sealing reliability of the packaging box.

[0079] like Figure 2 and Figure 3 As shown, during actual packaging, the first cover plate 2 is first covered on the first opening 11, and then the second cover plate 3 is folded and flipped to the slot 21 of the second cover plate 3, the first cover plate 2 and the second cover plate 3 cooperate to form an inner cover plate covering the first opening 11, and then the third cover plate 4 is folded and flipped and covered on the surfaces of the first cover plate 2 and the second cover plate 3, thereby achieving the limitation of the first cover plate 2 and the second cover plate 3 and ensuring their stability in covering the first opening 11.

[0080] It can be understood that since the third cover plate 4 is covered on the surfaces of the first cover plate 2 and the second cover plate 3, the third edge 113 can be set higher than the first edge 111 and the second edge 112 (preferably the third edge 113 is higher than the thickness of the third cover plate 4) to facilitate the third cover plate 4 to cover and fit the surfaces of the first cover plate 2 and the second cover plate 3.

[0081] Preferably, the shape of the third cover plate 4 matches the shape of the first opening 11 . In this embodiment, the third cover plate 4 is square and has the same area as the first opening 11 , so as to completely cover the first opening 11 .

[0082] like Figure 3 or Figure 4 As shown, in some embodiments, a chamfer 41 is provided at the corner where the third cover plate 4 and the first edge 111 cooperate.

[0083] By providing chamfered corners 41 at the corners where the third cover plate 4 and the first edge 111 and the second edge 112 cooperate, the chamfered corners 41 smooth the sharp corners of the third cover plate 4. When the user disassembles and assembles the packaging box, the chamfered corners 41 can avoid scratching the user, thereby improving the safety of the packaging box.

[0084] In this embodiment, the third cover plate 4 is square and has two corners that match the first side 111 . Both corners are provided with rounded corners 41 to ensure safety in use.

[0085] like Figure 5 As shown, in some embodiments, a distance a from the side edge of the second cover plate 3 facing the first side 111 to the first side 111 is greater than or equal to a radius R of the rounded corner 41 .

[0086] By setting the distance a from the side edge of the second cover plate 3 toward the first side 111 to the first side 111 to be greater than or equal to the radius R of the chamfer 41, it is possible to avoid the fitting gap between the second cover plate 3 and the first cover plate 2 being exposed, thereby improving the overall aesthetics of the packaging box and playing a dust-proof role, thereby preventing dust and other foreign matter from entering the interior of the packaging box through the gap and contaminating the product.

[0087] Optionally, the distance a from the side edge of the second cover plate 3 facing the first edge 111 to the first edge 111 may be equal to the radius R of the chamfer 41, or the distance a from the side edge of the second cover plate 3 facing the first edge 111 to the first edge 111 may be greater than the radius R of the chamfer 41. The specific setting is based on needs and is not limited in this embodiment.

[0088] like Figure 3 As shown, in some embodiments, the third cover plate 4 is provided with an inserting piece 42 , and a slot 12 is provided at the connection between the first cover plate 2 and the first edge 111 , and the inserting piece 42 can be inserted into the slot 12 and extend into the interior of the box body 1 .

[0089] By setting an insert 42 on the third cover plate 4 and setting a slot 12 at the connection between the first cover plate 2 and the first edge 111, when the third cover plate 4 is covered on the first opening 11, the insert 42 is driven to insert into the slot 12 and extend into the interior of the box body 1, thereby improving the stability of the third cover plate 4 covering the first opening 11.

[0090] In some embodiments, the length A1 of the inserting piece 42 gradually decreases in a direction away from the third cover plate 4 .

[0091] Further in the direction away from the third cover plate 4, the length A1 of the insert piece 42 is gradually reduced. When the insert piece 42 is inserted into the slot 12, the insert piece 42 with a gradually changing length is more convenient to insert into the slot 12, thereby reducing the difficulty of inserting the insert piece 42 and facilitating user operation.

[0092] In this embodiment, the insert piece 42 may specifically be a trapezoid, but is not limited thereto. For example, in other embodiments, the insert piece 42 may also be a triangle, a semicircle, or the like.

[0093] like Figure 3 and Figure 4 As shown, in some embodiments, the slot 12 has a first slot 121 and a second slot 122 that are connected, the second slot 122 is located on both sides of the first slot 121, the width D1 of the first slot 121 is greater than the thickness d1 of the insert piece 42, and the width D2 of the second slot 122 is less than or equal to the thickness d1 of the insert piece 42.

[0094] By setting the slot 12 to be connected with the first slot 121 and the second slot 122, when the insert piece 42 is inserted into the slot 12, the insert piece 42 is first inserted into the first slot 121. Since the width D1 of the first slot 121 is greater than the thickness d1 of the insert piece 42, the insert piece 42 can be easily inserted into the first slot 121. When the insert piece 42 is gradually inserted into the second slot 122, since the width D2 of the second slot 122 is less than or equal to the thickness d1 of the insert piece 42, the insert piece 42 is snapped into the second slot 122 to achieve snap-on fixation. Therefore, by setting the slot 12, it is possible to facilitate the insertion of the insert piece 42 into the slot 12, and ensure the plugging stability of the insert piece 42, and avoid the insert piece 42 from falling out of the slot 12.

[0095] In some embodiments, the length B1 of the slot 12 is greater than the length A1 of the insert 42 .

[0096] By setting the length of the slot 12 to be greater than the length of the insert 42 , it can be ensured that the insert 42 is inserted into the slot 12 , and the length margin of the slot 12 can also avoid the situation where the insert 42 is difficult to insert into the slot 12 due to processing errors.

[0097] In some embodiments, the length of the slot 12 is B1 = A1 + 2 mm.

[0098] By reasonably setting the length of the slot 12 and the length of the insert 42, it is possible to ensure that the insert 42 is inserted into the slot 12, while preventing the slot 12 from being too long, which may lead to an unsightly appearance and the existence of gaps.

[0099] like Figure 3 As shown, in some embodiments, the inserting piece 42 is provided with an inserting hole 421 , and the box body 1 is provided with an inserting tongue 13 at a position corresponding to the inserting piece 42 , and the inserting tongue 13 can be inserted into the inserting hole 421 and extend between the third cover plate 4 and the first cover plate 2 .

[0100] After the plug 42 is inserted into the slot 12, the tongue 13 is further inserted into the insertion hole 421 of the plug 42 and extends between the third cover plate 4 and the first cover plate 2. The tongue 13 can limit and lock the plug 42 to prevent the plug 42 from falling out of the slot 12, thereby improving the stability of the plug 42 being inserted into the slot 12.

[0101] like Figure 5 As shown, in some embodiments, the length A2 of the inserting tongue 13 gradually decreases in a direction away from the box body 1 .

[0102] Further in the direction away from the box body 1, the length A2 of the plug tongue 13 is gradually reduced. When the plug tongue 13 is inserted into the socket 421, the plug tongue 13 with a gradually changing length is more convenient to insert into the socket 421, thereby reducing the insertion difficulty of the plug tongue 13 and facilitating the user's operation.

[0103] In this embodiment, the inserting tongue 13 may be a trapezoid, but is not limited thereto. For example, in other embodiments, the inserting tongue 13 may also be a triangle, a semicircle, or the like.

[0104] like Figure 3 and Figure 4 As shown, in some embodiments, the insertion hole 421 has a third insertion slot 4211 and a fourth insertion slot 4212 that are connected, the fourth insertion slot 4212 is located on both sides of the third insertion slot 4211, the width D3 of the third insertion slot 4211 is greater than the thickness d2 of the insertion tongue 13, and the width D4 of the fourth insertion slot 4212 is less than or equal to the thickness d2 of the insertion tongue 13.

[0105] By configuring the insertion hole 421 as the third insertion slot 4211 and the fourth insertion slot 4212 which are connected, when the plug tongue 13 is inserted into the insertion hole 421, the plug tongue 13 is first inserted into the third insertion slot 4211. Since the width D3 of the third insertion slot 4211 is greater than the thickness d2 of the plug tongue 13, the plug tongue 13 can be easily inserted into the third insertion slot 4211. When the plug tongue 13 is gradually inserted into the fourth insertion slot 4212, since the width D4 of the fourth insertion slot 4212 is less than or equal to the thickness d2 of the plug tongue 13, the plug tongue 13 is clamped and fixed in the fourth insertion slot 4212. Therefore, by configuring the insertion hole 421, it is possible to facilitate the insertion of the plug tongue 13 into the slot 12, and ensure the plugging stability of the plug tongue 13, thereby preventing the plug tongue 13 from falling out of the insertion hole 421.

[0106] In some embodiments, the length B2 of the insertion hole 421 is greater than the length A2 of the insertion tongue 13 .

[0107] By setting the length of the insertion hole 421 to be greater than the length of the insertion tongue 13, it can be ensured that the insertion tongue 13 is inserted into the insertion hole 421, and the length margin of the insertion hole 421 can also avoid the situation where the insertion tongue 13 is difficult to insert into the insertion hole 421 due to processing errors.

[0108] In some embodiments, the length of the insertion hole 421 is B2=A2+2 mm.

[0109] By reasonably setting the length of the jack 421 and the length of the tongue 13, it is possible to ensure that the tongue 13 is inserted into the jack 421, while preventing the jack 421 from being too long, which may lead to an unsightly appearance and the existence of gaps.

[0110] like Figure 4 and Figure 6 As shown, in some embodiments, the box body 1 also has a second opening, the second opening is opposite to the first opening 11, the second opening is provided with a fourth side 14, a fifth side 15 and a sixth side 16, the fourth side 14 and the fifth side 15 are opposite, and the sixth side 16 is located between the fourth side 14 and the fifth side 15, the packaging box also includes a fourth cover plate 5, a fifth cover plate 6 and a sixth cover plate 7, the fourth cover plate 5 is arranged on the fourth side 14, the fifth cover plate 6 is arranged on the fifth side 15, and the sixth cover plate 7 is arranged on the sixth side 16, the fourth cover plate 5, the fifth cover plate 6 and the sixth cover plate 7 are mutually snap-fitted and covered on the second opening, wherein the fourth cover plate 5 is located in the innermost layer, the fifth cover plate 6 is located in the outermost layer, and the sixth cover plate 7 is located between the fourth cover plate 5 and the fifth cover plate 6.

[0111] By arranging the fourth side 14, the fifth side 15 and the sixth side 16 at the second opening, the fourth cover plate 5, the fifth cover plate 6 and the sixth cover plate 7 are respectively arranged on the fourth side 14, the fifth side 15 and the sixth side 16, and the fourth cover plate 5, the fifth cover plate 6 and the sixth cover plate 7 are mutually snap-fitted and covered on the second opening, the second opening can be shielded and sealed, thereby ensuring the sealing of the packaging box.

[0112] In this embodiment, since the box body 1 is configured to be square, the second opening is also a square opening, and the size of the second opening is equal to the size of the first opening 11. The first opening 11 forms the top opening of the packaging box, and the second opening forms the bottom opening of the packaging box.

[0113] The second opening is provided with a fourth side 14 , a fifth side 15 and two sixth sides 16 , and the corresponding fourth cover plate 5 is provided with one, the fifth cover plate 6 is provided with one, and the sixth cover plate 7 is provided with two and they are respectively provided in one-to-one correspondence with the two sixth sides 16 .

[0114] Preferably, the fourth side 14 , the fifth side 15 and the sixth side 16 are flush, so that the fourth cover plate 5 , the fifth cover plate 6 and the sixth cover plate 7 are mutually engaged and matched in the same plane.

[0115] The fourth cover plate 5 and the fifth cover plate 6 are provided with ears and slots that fit together. When the fourth cover plate 5 and the fifth cover plate 6 are both covered on the second opening, the ears on the fourth cover plate 5 correspond to the slots of the fifth cover plate 6, the ears on the fourth cover plate 5 and the inner wall of the fifth cover plate 6 fit together, the slots on the fourth cover plate 5 and the ears of the fifth cover plate 6 correspond, the ears of the fifth cover plate 6 are inserted into the interior of the box body 1 through the slots on the fourth cover plate 5 and fit together with the inner wall of the fourth cover plate 5, thereby realizing the snap-fit ​​between the fourth cover plate 5 and the fifth cover plate 6.

[0116] The sixth cover plate 7 is clamped between the outer wall of the fourth cover plate 5 and the inner wall of the fifth cover plate 6 to enhance the clamping strength between the fourth cover plate 5 and the fifth cover plate 6 to prevent the two from loosening, thereby improving the carrying capacity of the packaging box.

[0117] In some embodiments, the fourth cover plate 5 has a first mating edge 51, one end of the first mating edge 51 is arranged between the fourth side 14 and the sixth side 16, and the other end of the first mating edge 51 extends toward the fifth side 15, the sixth cover plate 7 has a second mating edge 71, one end of the second mating edge 71 is arranged between the fourth side 14 and the sixth side 16, and the other end of the second mating edge 71 extends toward the interior of the box body 1, and the second mating edge 71 protrudes toward the fourth side 14, the first mating edge 51 is located between the sixth side 16 and the second mating edge 71, and the second mating edge 71 is located between the first mating edge 51 and the fourth side 14.

[0118] By protruding the second mating edge 71 toward the fourth side 14, and the first mating edge 51 is located between the sixth side 16 and the second mating edge 71, and the second mating edge 71 is located between the first mating edge 51 and the fourth side 14, the first mating edge 51 and the second mating edge 71 are staggered to reduce the corner mating gap between the first mating edge 51 and the second mating edge 71, so as to avoid the corner mating gap being too large and causing the product inside the packaging box to be exposed.

[0119] In some embodiments, the second mating edge 71 is an arc edge, and an included angle α between the arc tangent at one end of the second mating edge 71 and the sixth side 16 is 45° to 90°.

[0120] By setting the included angle α between the arc tangent at one end of the second mating edge 71 and the sixth edge 16 within a reasonable range, the curvature of the second mating edge 71 protruding toward the fourth edge 14 can be controlled to minimize material usage while ensuring that the corner mating gap between the first mating edge 51 and the second mating edge 71 is reduced.

[0121] Exemplarily, the angle α can be 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 90°, etc., and can be set according to needs, and this embodiment does not limit it.

[0122] In some embodiments, an angle β between a line from one end to the other end of the second mating edge 71 and the sixth side 16 is 30° to 50°.

[0123] By setting the angle β between the line connecting one end to the other end of the second mating edge 71 and the sixth side 16 within a reasonable range, the position of the second mating edge 71 can be controlled at a suitable position to ensure that the corner mating gap between the first mating edge 51 and the second mating edge 71 can be reduced.

[0124] Exemplarily, the angle β can be 30°, 35°, 40°, 45°, 50°, etc., and can be set according to specific needs, and this embodiment does not limit it.

[0125] In some embodiments, the first mating edge 51 includes a first edge segment 511 and a second edge segment 512 connected to each other, the first edge segment 511 is close to the connection between the fourth edge 14 and the sixth edge 16, and the first edge segment 511 abuts against the sixth edge 16, and the second edge segment 512 and the sixth edge 16 are gap-fitted.

[0126] By setting the first mating edge 51 to include a first edge segment 511 and a second edge segment 512 connected to each other, the first edge segment 511 abuts against the sixth edge 16 to seal the corner gap between the fourth edge 14 and the sixth edge 16, and the clearance fit between the second edge segment 512 and the sixth edge 16 can avoid contact friction between the second edge segment 512 and the sixth edge 16, which is beneficial to the operation of the fourth cover plate 5 covering the second opening.

[0127] Preferably, the length of the first edge segment 511 is smaller than the length of the second edge segment 512, so as to reduce the contact friction between the first mating edge 51 and the sixth edge 16 by reducing the length of the first edge segment 511 as much as possible, while ensuring that the first edge segment 511 blocks the corner mating gap between the first mating edge 51 and the second mating edge 71.

[0128] In some embodiments, the fifth cover plate 6 has a third mating edge 61, one end of the third mating edge 61 is arranged between the fifth side 15 and the sixth side 16, and the other end of the third mating edge 61 extends toward the interior of the box body 1, the sixth cover plate 7 has a fourth mating edge 72, one end of the fourth mating edge 72 is arranged between the fifth side 15 and the sixth side 16, the third mating edge 61 is located between the sixth side 16 and the fourth mating edge 72, and the fourth mating edge 72 is located between the third mating edge 61 and the fifth side 15.

[0129] By arranging the third mating edge 61 between the sixth side 16 and the fourth mating edge 72, and the fourth mating edge 72 between the third mating edge 61 and the fifth side 15, the third mating edge 61 and the fourth mating edge 72 are staggered to reduce the corner mating gap between the third mating edge 61 and the fourth mating edge 72, so as to avoid the corner mating gap being too large and causing the product inside the packaging box to be exposed.

[0130] In some embodiments, the fourth mating edge 72 includes a third edge segment 721 and a fourth edge segment 722 connected to each other, the third edge segment 721 is close to the connection between the fifth side 15 and the sixth side 16, and the third edge segment 721 abuts against the fifth side 15, and the fourth edge segment 722 and the fifth side 15 are loosely matched.

[0131] By setting the fourth mating edge 72 to include a third edge segment 721 and a fourth edge segment 722 connected to each other, the third edge segment 721 abuts against the fifth side 15 to seal the corner gap between the fifth side 15 and the sixth side 16, and the clearance fit between the fourth edge segment 722 and the fifth side 15 can avoid contact friction between the fourth edge segment 722 and the fifth side 15, which is beneficial to the operation of the sixth cover plate 7 covering the second opening.

[0132] Preferably, the length of the third edge segment 721 is smaller than the length of the fourth edge segment 722, so as to reduce the contact friction between the fourth mating edge 72 and the fifth edge 15 by reducing the length of the third edge segment 721 as much as possible, while ensuring that the third edge segment 721 blocks the corner mating gap between the third mating edge 61 and the fourth mating edge 72.

[0133] As for the setting position, preferably, the inserting piece 42 is set at the middle position of the third cover plate 4 , and correspondingly, the slot 12 is set at the middle position of the first side 111 and aligned with the inserting piece 42 .

[0134] The inserting tongue 13 corresponds to the middle position of the first side 111 , and accordingly, the inserting hole 421 is disposed at the middle position of the inserting piece 42 and is aligned with the inserting tongue 13 .

[0135] It should be noted that the packaging box can be formed by cutting and folding cardboard / cardboard, but is not limited to this.

[0136] In this embodiment, the shape, size, quantity and position of the relevant structures are the optimal technical solutions of this embodiment. Those skilled in the art can adjust the shape, size, quantity and position of the structures as needed, which is not limited to this embodiment.

[0137] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the present application.

Claims

1. A packaging box, characterized in that: include: A box body (1) has a first opening (11), wherein the first opening (11) has a first edge (111) and a second edge (112), wherein the first edge (111) and the second edge (112) are adjacent to and flush with each other; A first cover plate (2) is arranged on the first side (111), and the first cover plate (2) is provided with a slot (21); A second cover plate (3) is arranged on the second side (112), and the second cover plate (3) matches the slot (21); Based on the packaging box being in a closed state, the first cover plate (2) is folded along the first edge (111) toward the interior of the packaging box, and the second cover plate (3) is folded along the second edge (112) toward the interior of the packaging box to the slot (21), and the first cover plate (2) and the second cover plate (3) cooperate to form an inner cover plate covering the first opening (11).

2. The packaging box according to claim 1, characterized in that: The first opening (11) also has a third side (113), the third side (113) and the first side (111) are opposite, the second side (112) is provided between the third side (113) and the first side (111), the packaging box also includes a third cover plate (4), the third cover plate (4) is arranged on the third side (113), based on the packaging box being in a closed state, the third cover plate (4) is folded along the third side (113) toward the inside of the packaging box to form an outer cover plate covering the first opening (11).

3. The packaging box according to claim 2, characterized in that: The corners where the third cover plate (4) cooperates with the first edge (111) and the second edge (112) are provided with rounded corners (41).

4. The packaging box according to claim 3, characterized in that: A distance a from a side edge of the second cover plate (3) facing the first edge (111) to the first edge (111) is greater than or equal to a radius R of the rounded corner (41).

5. The packaging box according to any one of claims 2 to 4, characterized in that: The third cover plate (4) is provided with an inserting piece (42), and a slot (12) is provided at the connection between the first cover plate (2) and the first edge (111), and the inserting piece (42) can be inserted into the slot (12) and extend into the interior of the box body (1).

6. The packaging box according to claim 5, characterized in that: Along the direction away from the third cover plate (4), the length A1 of the inserting piece (42) gradually decreases.

7. The packaging box according to claim 6, characterized in that: The slot (12) comprises a first insertion slot (121) and a second insertion slot (122) which are connected to each other, the second insertion slot (122) being located on both sides of the first insertion slot (121), the width D1 of the first insertion slot (121) being greater than the thickness d1 of the insertion piece (42), and the width D2 of the second insertion slot (122) being less than or equal to the thickness d1 of the insertion piece (42).

8. The packaging box according to claim 5, characterized in that: The length B1 of the slot (12) is greater than the length A1 of the insert (42).

9. The packaging box according to claim 8, characterized in that: The length of the slot (12) is B1=A1+2 mm.

10. The packaging box according to claim 5, characterized in that: The inserting piece (42) is provided with an inserting hole (421), and the box body (1) is provided with an inserting tongue (13) at a position corresponding to the inserting piece (42), and the inserting tongue (13) can be inserted into the inserting hole (421) and extend between the third cover plate (4) and the first cover plate (2).

11. The packaging box according to claim 10, characterized in that: In a direction away from the box body (1), the length A2 of the inserting tongue (13) gradually decreases.

12. The packaging box according to claim 11, characterized in that: The insertion hole (421) has a third insertion slit (4211) and a fourth insertion slit (4212) that are connected, the fourth insertion slit (4212) being located on both sides of the third insertion slit (4211), a width D3 of the third insertion slit (4211) being greater than a thickness d2 of the insertion tongue (13), and a width D4 of the fourth insertion slit (4212) being less than or equal to the thickness d2 of the insertion tongue (13).

13. The packaging box according to claim 10, characterized in that: The length B2 of the insertion hole (421) is greater than the length A2 of the insertion tongue (13).

14. The packaging box according to claim 13, characterized in that: The length of the insertion hole (421) is B2=A2+2mm.

15. The packaging box according to any one of claims 1 to 4, characterized in that: The box body (1) further comprises a second opening, the second opening being opposite to the first opening (11), the second opening being provided with a fourth side (14), a fifth side (15) and a sixth side (16), the fourth side (14) being opposite to the fifth side (15), the sixth side (16) being located between the fourth side (14) and the fifth side (15), and the packaging box further comprising: a fourth cover plate (5), arranged on the fourth side (14); a fifth cover plate (6), disposed on the fifth side (15); The sixth cover plate (7) is arranged on the sixth edge (16), and the fourth cover plate (5), the fifth cover plate (6) and the sixth cover plate (7) are mutually snap-fitted and covered on the second opening, wherein the fourth cover plate (5) is located at the innermost layer, the fifth cover plate (6) is located at the outermost layer, and the sixth cover plate (7) is located between the fourth cover plate (5) and the fifth cover plate (6).

16. The packaging box according to claim 15, characterized in that: The fourth cover plate (5) has a first mating edge (51), one end of which is arranged between the fourth side (14) and the sixth side (16), and the other end of which extends toward the fifth side (15); the sixth cover plate (7) has a second mating edge (71), one end of which is arranged between the fourth side (14) and the sixth side (16), and the other end of which extends toward the interior of the box body (1); the second mating edge (71) is protruding toward the fourth side (14); the first mating edge (51) is located between the sixth side (16) and the second mating edge (71), and the second mating edge (71) is located between the first mating edge (51) and the fourth side (14).

17. The packaging box according to claim 16, characterized in that: The second mating edge (71) is an arc edge, and the included angle α between the arc tangent of one end of the second mating edge (71) and the sixth edge (16) is 45° to 90°.

18. The packaging box according to claim 16, characterized in that: An included angle β between a line connecting one end to the other end of the second mating edge (71) and the sixth side (16) is 30° to 50°.

19. The packaging box according to claim 16, characterized in that: The first mating edge (51) comprises a first edge segment (511) and a second edge segment (512) connected to each other, wherein the first edge segment (511) is close to the connection between the fourth edge (14) and the sixth edge (16), and the first edge segment (511) is abutted against the sixth edge (16), and the second edge segment (512) and the sixth edge (16) are loosely fitted.

20. The packaging box according to claim 15, characterized in that: The fifth cover plate (6) has a third mating edge (61), one end of which is arranged between the fifth side (15) and the sixth side (16), and the other end of which extends toward the interior of the box body (1); the sixth cover plate (7) has a fourth mating edge (72), one end of which is arranged between the fifth side (15) and the sixth side (16); the third mating edge (61) is located between the sixth side (16) and the fourth mating edge (72), and the fourth mating edge (72) is located between the third mating edge (61) and the fifth side (15).

21. The packaging box according to claim 20, characterized in that: The fourth mating edge (72) comprises a third edge segment (721) and a fourth edge segment (722) connected to each other, wherein the third edge segment (721) is close to the connection between the fifth edge (15) and the sixth edge (16), and the third edge segment (721) abuts against the fifth edge (15), and the fourth edge segment (722) and the fifth edge (15) are loosely fitted.

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