Tape-free cardboard packaging

Abstract

Tape-free cardboard packaging, which can be in an open or closed state, comprising: a cardboard body (10); two flaps (11) which are each arranged on opposite sides of an open end of the cardboard body (10); and a connecting element (40) of which one end is integrally or slidably formed or arranged with or on one of the two flaps (11); wherein, when the tape-free packaging carton is in the closed state, the other end of the connecting element (40) is connected to the other of the two flaps (11); characterized in that the carton body (10) is a one-piece formed carton body; and the two flaps (11) are arranged at the upper open end and / or lower open end of the cardboard body (10); wherein the connecting element (40) is a sealing strip and is arranged along the longitudinal direction of the upper open end and / or the lower open end of the cardboard body (10) and comprises a horizontal segment (41) and two extended connecting segments (42), wherein the two extended connecting segments (41) are each formed in one piece on two opposite sides of the longitudinal direction of the horizontal segment (41), wherein the horizontal segment (41) is provided with several buttonholes (411) and several waist-shaped holes (412) and the buttonholes (411) and the waist-shaped holes (412) are each located on two sides of the longitudinal direction of the horizontal segment (41); wherein the cardboard body (10) is provided with several locking pieces (413), wherein each locking piece (413) is aligned with the corresponding buttonhole (411) and the corresponding waist-shaped hole (412) and is connected by a screw (30) to the corresponding flap (11) located on two opposite sides in the longitudinal direction of the cardboard body (10), whereby the connecting element (40) is movably connected to one side of this flap (11), wherein the respective locking piece (413) aligned with the corresponding waist-shaped hole (412) is inserted through this waist-shaped hole (412) by means of the corresponding screw (30) and connected to one side of this flap (11).

Description

Field of invention

[0001] The present invention relates to the technical field of packaging cartons and in particular to a packaging carton without adhesive tape. State of the art

[0002] Packaging cartons are primarily used for transport, loading, unloading, and storage. The openings of conventional packaging cartons are typically sealed with adhesive tape, with the bottom and top flaps being symmetrical and straight. However, if a carton loaded with items is scratched during daily use, causing the tape to loosen or lose its stickiness, the opening is no longer securely sealed, leaving the contents exposed. It is also common for malicious individuals to remove items from the carton and then reseal the opening. Furthermore, the use of adhesive tape is neither environmentally friendly nor does it provide sufficient stability. Additionally, the processing requires an extra sealing step with tape, increasing processing costs and reducing production efficiency.Given this situation, this problem urgently needs to be solved.

[0003] Document US 2001 / 0002678A1 discloses a tape-free packaging carton with the features of the preamble of claim 1. Similar packaging cartons are also described in documents US 2,256,834A, WO 2011 / 097650A2, JP 2013-252887A, US 1,705,245A, and US 10,023,353B2. Document US 1,869,927A relates to a collapsible packaging carton. However, further improvements are still needed. Object of the invention

[0004] It is an object of the present invention to provide a tape-free packaging carton that relies on its own structure to achieve a tight seal without the need for sealing with adhesive tape. The invention has a long service life. Technical solution

[0005] The object of the present invention is achieved by a tape-free packaging carton with the features of claim 1. Advantageous embodiments are the subject of the dependent claims.

[0006] The adhesive tape-free packaging carton according to the invention can be in an open or closed state and comprises a carton body, two flaps arranged on opposite sides of an open end of the carton body, and a connecting element, one end of which is integrally or slidably formed with or arranged on one of the two flaps, wherein, when the adhesive tape-free packaging carton is in the closed state, the other end of the connecting element is connected to the other of the two flaps.

[0007] According to the invention, the cardboard body is a one-piece formed cardboard body, wherein the two flaps are arranged at the upper open end and / or lower open end of the cardboard body, wherein the connecting element is a sealing strip and is arranged along the longitudinal direction of the upper open end and / or the lower open end of the cardboard body and comprises a horizontal segment and two extended connecting segments, wherein the two extended connecting segments are each formed one-piece on two opposite sides of the longitudinal direction of the horizontal segment, wherein the horizontal segment is provided with several buttonholes and several waist-shaped holes and the buttonholes and the waist-shaped holes are each located on two sides of the longitudinal direction of the horizontal segment, wherein the cardboard body is provided with several locking pieces.wherein a respective locking piece is matched to the corresponding buttonhole and the corresponding waist-shaped hole and is connected by a screw to the corresponding flap located on two opposite sides in the longitudinal direction of the cardboard body, whereby the connecting element is movably connected to one side of this flap, wherein the respective locking piece matched to the corresponding waist-shaped hole is inserted through this waist-shaped hole by means of the corresponding screw and connected to one side of this flap.

[0008] As a preferred solution, each buttonhole comprises a main through-hole and an alternate hole, wherein each main through-hole is adapted to the outer contour shape of the corresponding detent piece, each alternate hole is adapted to the corresponding screw, and each main through-hole is continuously connected to the corresponding alternate hole, wherein a gap is formed between the detent pieces and the surface of the carton body to allow the connecting element to move within it, wherein, when the tape-free packaging carton is in the closed state, the detent pieces adapted to the horizontal segment are all inserted through the corresponding buttonholes of the horizontal segment, and their screws are engaged in the corresponding alternate holes.

[0009] As a preferred solution, a second locking piece is arranged on each of the two opposite sides in the width direction of the cardboard body, wherein each second locking piece interacts with the corresponding extended connecting segment by means of a corresponding second screw.

[0010] As a preferred solution, the connecting element is pressed in a coordinated manner over and spans the flaps located on two opposite sides in the longitudinal direction of the cardboard body, with the two extended connecting segments each being folded towards the two opposite sides located in the width direction of the cardboard body, with the second locking pieces located in the width direction of the cardboard body each being inserted through a buttonhole located on one side of the corresponding extended connecting segment and the second screws being engaged in the corresponding escape holes, with the length of the horizontal segment being equal to the length of the cardboard body.

[0011] The preferred solution is the number of buttonholes A arranged in the horizontal segment, the number of waist-shaped holes B arranged in the horizontal segment, and the number of latching pieces C arranged on a respective lateral flap located at the upper open end and / or lower open end in the longitudinal direction of the cardboard body, where A = B = C and C ≥ 2.

[0012] As a preferred solution, at least one of the two sides in the width direction of the cardboard body is provided with an anti-lift button, wherein the part of the anti-lift button which is inserted through at least one of the two sides of the cardboard body and protrudes from it is provided with a hanging hole for the anti-lift strap, wherein the extended connecting segment located on one side is provided with a buttonhole and the extended connecting segment located on the other side is provided with a through hole, wherein in the closed state the anti-lift button is first inserted through the through hole and then an anti-lift strap is inserted through the hanging hole for the anti-lift strap.

[0013] The preferred solution is to provide a through-hole at the edges of the extended connecting segments located on two sides, intended for lifting with the fingers.

[0014] As a preferred solution, the flaps located on the top and bottom surfaces in the longitudinal direction of the cardboard body are each provided with several sets of locking structures, wherein each set of locking structures has a tongue and a slot, the tongue being wider on the outside and narrower on the inside, and its shape being adapted to that of the slot, wherein a tongue is provided at the edge of a flap located on one side in the longitudinal direction, and a slot is provided at the edge of the flap located on the other side in the longitudinal direction, wherein a further slot is provided next to the tongue of the flap located on the same side.

[0015] The preferred solution is the number of grid structures D, where D ≥ 2.

[0016] As a preferred solution, the inner surface of a lateral flap located at the upper open end and / or lower open end in the longitudinal direction of the cardboard body is firmly connected to a connecting plate by the screws, wherein the length of the connecting plate is E, the length of a flap located in the longitudinal direction is F, and in the closed state the distance between the two flaps located in the width direction is G, where F > E > G.

[0017] As a preferred solution, at least one of the four outer surfaces of the cardboard body is designed as a non-slip surface, and the non-slip surface is designed as a non-slip film or formed as a non-slip surface.

[0018] The width of a waist-shaped hole can be M and the diameter of a screw can be N, where M = N.

[0019] Advantageous effects of the present invention: The flaps located on opposite sides of an open end of the cardboard body are provided with a connecting element, wherein, when the adhesive tape-free packaging carton is in the closed state, the two ends of the connecting element are connected to the two flaps in order to ensure a tight closure of the opening of the cardboard body without the need for sealing with adhesive tape. Brief description of the drawings Fig. Figure 1 shows a first example of a packaging carton without adhesive tape; Fig. Figure 2 shows the first example of the tape-free packaging carton, in which the carton body is in the closed state; Fig. Figure 3 shows a top view of the connecting sections located on opposite sides; Fig. Figure 4 shows another example of a packaging carton without adhesive tape; Fig. Figure 5 shows another example of a packaging carton without adhesive tape; Fig. Figure 6 shows another example of a packaging carton without adhesive tape; Fig. Figure 7 shows another example of a packaging carton without adhesive tape; Fig. Figure 8 shows another example of a packaging carton without adhesive tape; Fig. Figure 9 shows a perspective view of an embodiment of the present invention in its state of use; Fig. Figure 10 shows a perspective view of the embodiment of the present invention in the open state; Fig. Figure 11 shows another perspective view of the embodiment of the present invention in the open state. Detailed description of the exemplary implementations

[0020] To better understand the features, technical means and specific tasks and functions to be solved or achieved by the present invention, concrete embodiments are described in detail below with reference to the accompanying drawings.

[0021] In the present invention, terms such as "attach," "connect," and "fasten" are to be understood in a broad sense unless expressly stated otherwise and limited. For example, they may refer to a mechanical connection or an electrical connection. These may be direct connections, indirect connections established through a medium, or continuous connections between two components. To a person skilled in the art, the specific meanings of the aforementioned terms in the present invention are obvious according to the specific situations.

[0022] It will be directed to the Fig. Reference is made to Figures 1 to 3. The adhesive tape-free packaging carton according to the invention can be in an open or closed state and comprises a carton body 10, two flaps 11 arranged on opposite sides of an open end of the carton body 10, and a connecting element 40, one end of which is attached to one of the two flaps 11. More precisely, one end of the connecting element 40 is integrally formed with one of the two flaps 11. When the adhesive tape-free packaging carton is in the closed state, the other end of the connecting element is connected to the other of the two flaps 11.

[0023] In this example, flaps 11 are arranged around the open end of the cardboard body 10, with the outermost flaps 11 on opposite sides each being provided with a connecting element 40. Each connecting element 40 comprises coordinated, offset, and interlocking connecting sections 12, formed by the free ends of the flaps 11 on opposite sides, where the width of a projecting segment 16 is greater than the width of a connecting segment 23. Each connecting section 12 is designed in a teardrop shape. The outer connecting plate 14 is arranged on the lower surface of a side flap 11, and its position corresponds to that of the connecting sections 12 of this side flap 11.The inner connecting plate 13 is arranged on the upper surface of the opposite side flap 11, and its position corresponds to that of the connecting sections 12 of this side flap 11. When the outer connecting plate 14 is located directly above the inner connecting plate 13, the cardboard body 10 is in a sealed, closed state, with the inner connecting plate 13 and the outer connecting plate 14 connected to each other by connecting pieces. The connecting pieces comprise several button bases 21 arranged on the inner surface of the outer connecting plate 14 and several button tops 19 arranged on the outer surface of the inner connecting plate 13 and matched to the button bases 21.To ensure flatness when connecting the outer connecting plate 14 and the inner connecting plate 13, the button bases 21 are embedded in the inner surface of the outer connecting plate 14 and are flush with the inner surface. The inner connecting plate 13 and the outer connecting plate 14 can be firmly and tightly connected because the button bases 21 and the button tops 19 correspond to each other. Furthermore, to achieve the anti-opening effect, a plastic closure band 15 can be attached to the outermost flap 11. The outermost flap 11, located on the opposite side, is provided with a hanging ring 22. If the carton is to be opened, the plastic closure band 15 must be broken. If it turns out that the plastic closure band 15 has broken, there is a high probability that the carton has opened.A tight seal is ensured by the connecting sections, whose two sides are aligned, offset, and interlock, and where the width of a protruding segment is greater than the width of a connecting segment. Because the width of a protruding segment is greater than the width of a connecting segment, it is effectively prevented that the flaps on opposite sides will detach during movement in the opposite direction. Therefore, sealing with adhesive tape is unnecessary. The connecting sections are then pressed tightly together by the outer and inner connecting plates, further reinforcing the tightness of the seal.When the carton is opened and the connecting sections 12 are pulled up one after the other, they deform because they have an irregular shape, their two sides are aligned, offset, and interlocking, and the width of a protruding segment is greater than the width of a connecting segment. This deformation impairs the tightness when resealing. Therefore, the connecting sections 12 can be separated simultaneously using the outer connecting plate 14 and the inner connecting plate 13 without deformation, thus extending their service life.

[0024] The connecting pieces can include a hook and loop fastener arranged on the inner surface of the outer connecting plate 14 and another hook and loop fastener arranged on the outer surface of the inner connecting plate 13 and matched to the aforementioned hook and loop fastener.

[0025] The connecting pieces can comprise a magnetic piece arranged on the inner surface of the outer connecting plate 14 and another magnetic piece arranged on the outer surface of the inner connecting plate 13 and corresponding to the aforementioned magnetic piece.

[0026] The cardboard body 10 can be designed in a rectangular shape, with each of the four sides of an open end of the cardboard body 10 having a flap 11, and the free ends of the flaps 11 located on two opposite sides being provided with coordinated, offset, and mutually interlocking connecting sections 12. The remainder is the same as in the first described example (not shown in the figure). Such a structural arrangement allows the double-layered connecting sections 12 to be stacked at an open end of the cardboard body, thereby further improving the tightness of the closure.

[0027] It will be on Fig. 4. Reference is made to the first example. The connecting sections 12 are designed in an arrow shape in this example, where the width of the protruding segment is greater than the width of the connecting segment. The rest is the same as in the first example.

[0028] It will be on Fig. 5. Reference is made to the first example. The connecting sections 12 are designed in a trapezoidal shape in this example, where the width of the protruding segment is greater than the width of the connecting segment. The rest is the same as in the first example.

[0029] It will be on Fig. 6. Reference is made to the first example. The connecting sections 12 are designed in a mushroom shape, where the width of the protruding segment is greater than the width of the connecting segment. The rest is the same as in the first example.

[0030] In another example, the connecting sections 12 are arranged in a combined form, where the width of the protruding segment is greater than the width of the connecting segment. The rest is the same as in the first example (not shown in the figures).

[0031] It will be on Fig. 7. The two opposite ends of the outer connecting plate 14 are each provided with an extension plate 18, each extension plate 18 being connected to the outside of the cardboard body 10 by a corresponding reinforced connector 17. The reinforced connectors 17 can be designed as hook-and-loop fasteners or snap fasteners. The rest is the same as in the first example. This design improves the tightness of the closure.

[0032] It will be on Fig. 8. Reference is made to the two opposite ends of the outer connecting plate 14 and the inner connecting plate 13, each provided with an extension plate 18, each with a slot 20 for inserting the extension plates 18 at the connection point of an inner lateral flap 11 located on two opposite sides with the cardboard body 10. The remainder is the same as in the first example. This design improves the tightness of the closure.

[0033] It will be directed to the Fig.Reference is made to Figures 9 to 11. The adhesive tape-free packaging carton according to the invention can be in an open or closed state and comprises a carton body 10, two flaps 11 arranged on opposite sides of an open end of the carton body 10, and a connecting element 40, one end of which is slidably arranged on one of the two flaps 11. More precisely, the connecting element 40 can slide relative to the flap 11 along the longitudinal direction of the flap 11. When the adhesive tape-free packaging carton is in the closed state, the other end of the connecting element 40 is connected to the other of the two flaps 11. In this exemplary embodiment, the carton body 10 is a rectangular carton formed in one piece to be foldable, with the flaps 11 each arranged around the upper and lower open ends of the carton body 10.The connecting element 40 is a sealing strip arranged along the upper open end and / or the lower open end of the cardboard body in its longitudinal direction, wherein the sealing strip may be a soft rubber with a specific toughness. The connecting element 40 comprises a horizontal segment 41 and two extended connecting segments 42 formed integrally on opposite sides of the longitudinal direction of the horizontal segment 41, wherein the length of the horizontal segment 41 is equal to the length of the cardboard body 10. On one side in the longitudinal direction of the horizontal segment 41, several buttonholes 411 are provided, and on the other side in the longitudinal direction of the horizontal segment 41, several waist-shaped holes 412, aligned with the corresponding buttonholes 411, are provided. One buttonhole 411 is provided on one side of an extended connecting segment 42.The flaps 11 located on two opposite sides along the length of the cardboard body 10 are each provided with several locking pieces 413 aligned with the buttonholes 411 and the waist-shaped holes 412, respectively. A gap is formed between the locking pieces 413 and the surface of the cardboard body 10 to allow the connecting element 40 to move within it. The locking pieces 413, aligned with the corresponding waist-shaped holes 412, are each inserted through the corresponding waist-shaped holes 412 by means of a screw 30, so that the connecting element 40 is movably connected to a side flap 11. The two opposite sides along the width of the cardboard body 10 are each connected by means of a screw 30 (or a second screw) to the locking pieces 413 (or a second set of locking pieces), which are aligned with the corresponding waist-shaped holes 412.Each buttonhole 411 comprises a main through-hole 47 and an alternate hole 46, wherein each main through-hole 47 is aligned with the outer contour of the corresponding detent 413, each alternate hole 46 is aligned with the corresponding screw 30, and each main through-hole 47 is fully connected to the corresponding alternate hole 46. Each main through-hole 47 is circular, and each detent 413 is also circular. The length of each waist-shaped hole 412 is greater than or equal to the diameter of the corresponding detent 413.

[0034] During use, the connecting elements 40 located on the top and bottom are pressed in a coordinated manner over and span the corresponding flaps 11 located on two opposite sides in the longitudinal direction of the cardboard body 10, whereby the extended connecting segments 42 located on two sides are each folded towards the two opposite sides located in the width direction of the cardboard body 10, whereby the locking pieces 413 located in the width direction of the cardboard body 10 on two opposite sides are each inserted through a buttonhole 411 located on one side of the corresponding extended connecting segment 42 and their screws 30 are engaged in the corresponding escape holes 46.wherein the locking pieces 413, which are aligned with the horizontal segment 41, are all inserted through the corresponding buttonholes 411 of the horizontal segment 41 and their screws 30 are engaged in the corresponding escape holes 46. In the present invention, no gluing process is required; only the connecting elements 40 (sealing strips) need to be pulled, so that the closure is achieved by the interaction of the buttonholes 411 and the locking pieces 413. To open, only the connecting elements 40 need to be pulled in the opposite direction to release the buttonholes 411 from the locking pieces 413, which is quick and easy and thus directly extends the service life of the present invention. To store the one-piece foldable, rectangular cardboard body, the cardboard body 10 only needs to be folded flat along its fold lines. The cardboard bodies can be stacked and stored.which saves storage space.

[0035] The number of buttonholes 411 arranged in the horizontal segment 41 is A, the number of waist-shaped holes 412 arranged in the horizontal segment 41 is B, and the number of latching pieces 413 arranged on a respective side flap 11 located at the upper and lower open ends in the longitudinal direction of the cardboard body 10 is C, where A = B = C and C ≥ 2. In the present example, the number of buttonholes 411 provided in the horizontal segment 41 is two, the number of waist-shaped holes 412 provided in the horizontal segment 41 is two, and the number of latching pieces 413 arranged on a side flap 11 located at the upper and lower open ends in the longitudinal direction of the cardboard body 10 is two.

[0036] In a preferred embodiment, the inner walls of the two opposite sides of the cardboard body 10 are each provided with an anti-lift button 51, the latter being aligned with the connecting segment 42 that extends on the side lacking a buttonhole 411. The portion of each anti-lift button 51 that passes through and protrudes from the cardboard body 10 is provided with a hanging hole for the anti-lift strap 52. The connecting segment 42, which extends on the side lacking a buttonhole 411, is provided with a through-hole 53 for passing the anti-lift strap 52 through the hanging hole. When the cardboard body is closed, and after the anti-lift buttons 51 have been passed through the corresponding through-holes 53, the anti-lift straps 54 are hung on the corresponding hanging holes for the anti-lift strap 52.To unpack the box, it is necessary to cut the anti-lift tape, so the present invention offers good theft and anti-lift functions, thereby increasing the security factor.

[0037] In a preferred embodiment, the extended connecting segments 42 are each provided on two sides with a through-hole 55 near their edges, intended for lifting with the fingers, to facilitate pulling the connecting elements 40. A finger can be inserted directly into the through-hole 55 intended for lifting with the fingers to adjust the corresponding connecting element 40 and thus effect the change in position of the opposite sides.

[0038] In a preferred embodiment, the flaps 11 located on the upper and lower sides in the longitudinal direction of the cardboard body 10 are both provided with several sets of locking structures 60. Each set of locking structures 60 comprises a locking tongue 61 with a wide outer side and a narrow inner side, located at the edge of the free end in the longitudinal direction of the corresponding flap 11, and a locking slot 62, located at the edge of the free end in the longitudinal direction of the other corresponding flap 11, which is adapted to the shape of the corresponding locking tongue 61 and serves to insert this locking tongue 61. Lateral locking slots 63 (or locking slots) with a narrow opening and a wide inner cavity are formed on two opposite sides of each locking tongue 61 at the edge of the free end of each flap 11 provided with the locking tongues 61.wherein, at the edge of the free end of each flap 11 provided with the plug-in tongues 61, lateral plug-in tongues 64, the shape of which is adapted to that of the corresponding lateral plug-in slot 63, are arranged projecting onto two opposite sides of a respective plug-in slot 62. The number of locking structures 60 is D, where D ≥ 2. In the present embodiment, the number of locking structures 60 is two. In actual use, the plug-in tongues 61 are inserted into the corresponding plug-in slots 62, with the lateral plug-in tongues 64 simultaneously being inserted into the corresponding lateral plug-in slots 63 to ensure that the two flaps 11 can be stably and sealingly connected to each other in the longitudinal direction, thereby further improving the degree of sealing.

[0039] In a preferred embodiment, the inner surface of each lateral flap 11 located at the upper and lower open ends in the longitudinal direction of the cardboard body 10 is firmly connected to a connecting plate 65 by means of screws 30, wherein the length of the connecting plate 65 is E, the length of the longitudinal flap 11 is F, and the distance between the flaps 11 located on two opposite sides in the lateral direction and in the closed state is G, where F > E > G. In the closed state, the connecting plates 65 are in contact with the flaps 11 located on two opposite sides in the lateral direction to prevent the flaps 11 located on two opposite sides in the lateral direction from rotating inwards due to a force directed in the direction of the upper and lower open ends.In this way, the safety of the objects placed in the present invention can be protected.

[0040] In a preferred embodiment, at least one of the four outer surfaces of the cardboard body 10 is designed as a non-slip surface. The non-slip surface is designed as a non-slip film or as a rough surface. When the cardboard body is folded flat and stacked, the friction between it and the upper or lower cardboard body is increased by the non-slip surface to ensure that the folded and stacked cardboard bodies remain vertical.

[0041] For example, the width of a waist-shaped hole 412 M and the diameter of a screw 30 N, where M = N. This arrangement ensures that when a fastener 40 is pulled, the screws 30 can be moved tightly along the longitudinal direction of the corresponding waist-shaped holes 412 without shifting in other directions, thus increasing the accuracy of fastening or unfastening.

Claims

[1] Tape-free cardboard packaging which may be in an open or closed state, comprising: a cardboard body (10); two flaps (11) which are each arranged on opposite sides of an open end of the cardboard body (10); and a connecting element (40) of which one end is integrally or slidably formed or arranged with or on one of the two flaps (11); wherein, when the tape-free packaging carton is in the closed state, the other end of the connecting element (40) is connected to the other of the two flaps (11); characterized by , that the cardboard body (10) is a one-piece formed cardboard body; and the two flaps (11) are arranged at the upper open end and / or lower open end of the cardboard body (10); wherein the connecting element (40) is a sealing strip and is arranged along the longitudinal direction of the upper open end and / or the lower open end of the cardboard body (10) and comprises a horizontal segment (41) and two extended connecting segments (42), wherein the two extended connecting segments (41) are each formed in one piece on two opposite sides of the longitudinal direction of the horizontal segment (41), wherein the horizontal segment (41) is provided with several buttonholes (411) and several waist-shaped holes (412) and the buttonholes (411) and the waist-shaped holes (412) are each located on two sides of the longitudinal direction of the horizontal segment (41); wherein the cardboard body (10) is provided with several locking pieces (413), wherein each locking piece (413) is aligned with the corresponding buttonhole (411) and the corresponding waist-shaped hole (412) and is connected by a screw (30) to the corresponding flap (11) located on two opposite sides in the longitudinal direction of the cardboard body (10), whereby the connecting element (40) is movably connected to one side of this flap (11), wherein the respective locking piece (413) aligned with the corresponding waist-shaped hole (412) is inserted through this waist-shaped hole (412) by means of the corresponding screw (30) and connected to one side of this flap (11). [2] Adhesive tape-free packaging carton according to claim 1, wherein each buttonhole (411) comprises a main through-hole (47) and a bypass hole (46), wherein each main through-hole (47) is aligned with the outer contour shape of the corresponding locking piece (413), each bypass hole (46) is aligned with the corresponding screw (30), and each main through-hole (47) is continuously connected to the corresponding bypass hole (46), wherein a gap is formed between the locking pieces (413) and the surface of the carton body (10) so that the connecting element (40) can move therein, wherein, when the adhesive tape-free packaging carton is in the closed state, the locking pieces (413) aligned with the horizontal segment (41) are all inserted through the corresponding buttonholes (411) of the horizontal segment (41), and their screws (30) are inserted into the corresponding bypass holes (46). be locked into place. [3] Adhesive tape-free packaging carton according to claim 2, wherein a second locking piece (413) is arranged on each of the two opposite sides in the width direction of the carton body (10), wherein each second locking piece (413) interacts with the corresponding extended connecting segment (42) by means of a corresponding second screw (30). [4] Adhesive tape-free packaging carton according to claim 3, wherein the connecting element (40) is pressed in a coordinated manner over and spans the flaps (11) located on two opposite sides in the longitudinal direction of the carton body (10), wherein the two extended connecting segments (42) are each folded towards the two opposite sides located in the transverse direction of the carton body (10), wherein the second locking pieces (413) located in the transverse direction of the carton body (10) are each inserted through a buttonhole (411) located on one side of the corresponding extended connecting segment (42) and the second screws (30) are engaged in the corresponding escape holes (46), wherein the length of the horizontal segment (41) is equal to the length of the carton body (10). [5] Tape-free packaging carton according to claim 4, wherein the number of buttonholes (411) arranged in the horizontal segment (41) is A, the number of waist-shaped holes (412) arranged in the horizontal segment (41) is B and the number of latching pieces (413) arranged on a respective lateral flap (11) located at the upper open end and / or lower open end in the longitudinal direction of the carton body (10) is C, wherein A = B = C and C ≥ 2. [6] Adhesive tape-free packaging carton according to claim 4, wherein at least one of the two sides in the width direction of the carton body (10) is provided with an anti-opening button (51), wherein the part of the anti-opening button (51) which is inserted through at least one of the two sides of the carton body (10) and protrudes from it is provided with a hanging hole for the anti-opening strap (52), wherein the extended connecting segment (42) located on one side is provided with a buttonhole (411) and the extended connecting segment (42) located on the other side is provided with a through hole (53), wherein in the closed state the anti-opening button (51) is first inserted through the through hole (53) and then an anti-opening strap (54) is inserted through the hanging hole for the anti-opening strap (52). [7] Adhesive tape-free packaging carton according to claim 4, wherein a through hole (55) intended for lifting with the fingers is provided at the edges of the extended connecting segments (42) located on two sides. [8] Adhesive tape-free packaging carton according to claim 4, wherein the flaps (11) located on the top and bottom surfaces in the longitudinal direction of the carton body (10) are each provided with several sets of locking structures (60), wherein each set of locking structures (60) has a locking tongue (61) and a locking slot (20), and the locking tongue (61) is wider on the outside and narrower on the inside and its shape is adapted to that of the locking slot (20), wherein a locking tongue (61) is provided at the edge of a flap (11) located in the longitudinal direction on one side and a locking slot (63) is provided at the edge of the flap (11) located in the longitudinal direction on the other side, wherein a further locking slot (63) is provided next to the locking tongue (61) of the flap (11) located on the same side. [9] Tape-free packaging carton according to claim 8, wherein the number of grid structures (60) is D, where D ≥ 2. [10] Adhesive tape-free packaging carton according to claim 4, wherein the inner surface of a lateral flap (11) located at the upper open end and / or lower open end in the longitudinal direction of the carton body (10) is firmly connected to a connecting plate (65) by the screws (30), wherein the length of the connecting plate (65) is E, the length of the flap (11) located in the longitudinal direction is F, and in the closed state the distance between the two flaps (11) located in the width direction is G, wherein F > E > G. [11] Adhesive tape-free packaging carton according to any one of claims 4 to 9, wherein at least one of the four outer surfaces of the carton body (10) is designed as a non-slip surface and the non-slip surface is designed as a non-slip film or is formed as a non-slip surface.

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