Corrugated board and corrugated board packaging box

Abstract

The present application relates to the field of paperboard packaging box, concretely is a kind of corrugated paperboard and corrugated paperboard packaging box, including outer paperboard, the side of outer paperboard is equipped with inner paperboard, paper sheet clamping plate is equipped between the outer paperboard and the inner paperboard, outer clamping layer is formed between the paper sheet clamping plate and the outer paperboard, inner clamping layer is formed between the paper sheet clamping plate and the inner paperboard, the surface of the side of outer paperboard away from the paper sheet clamping plate is pasted with film, wave paper core is filled between the outer clamping layer and the inner clamping layer.The upper locking piece of corrugated paperboard packaging box body top is pushed down to move when closing by pushing top plate, locking column is entered into lower locking piece, locking column in the middle is locked by upper and lower two locking pieces, so that locking column can support the pressure generated when carton is subjected to certain pressure, guarantee the strength of corrugated paperboard packaging box, improve the convenience of manufacturer and purchaser when using.

Description

Technical Field

[0001] This invention relates to the field of cardboard packaging boxes, specifically to a corrugated cardboard and its packaging box. Background Technology

[0002] Corrugated cardboard, also known as corrugated paperboard, is a multi-layered adhesive. It consists of at least one layer of corrugated core paper and one or more layers of cardboard bonded together. The corrugated core paper gives the cardboard high mechanical strength and good cushioning performance. Corrugated cardboard boxes are made by splicing together multiple different corrugated cardboard boxes. Corrugated boxes have high compressive strength and impact resistance, which can effectively protect the contents from damage during transportation and storage.

[0003] Ordinary corrugated cardboard boxes have weak pressure resistance. They will not break when transported individually or subjected to a small amount of pressure. However, in actual use, boxes need to be stacked during transportation to facilitate the overall transport of products. When stacked, the bottom box is subjected to the pressure of the top box, causing the side walls of the bottom box to deform due to external force and crack at the joints of the side walls. This can lead to the collapse of the stacked boxes and damage to the contents. Therefore, patent application CN113184325B provides a pressure-resistant and moisture-proof corrugated cardboard box and its manufacturing method. It uses a high-strength outer frame to ensure the overall strength of the corrugated cardboard box. However, using a high-strength outer frame increases the overall production cost of the corrugated cardboard box. In addition, the use of a high-strength outer frame requires the installation and disassembly of the outer frame before packing or unpacking, which causes inconvenience for both manufacturers and buyers.

[0004] Therefore, a corrugated cardboard and its corrugated cardboard packaging box are proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a corrugated cardboard and its packaging box to solve the problems that setting a high-strength outer frame will increase the overall production cost of the corrugated cardboard packaging box, and that using a high-strength outer frame requires installation and disassembly during packaging or unpacking, which will cause inconvenience to manufacturers and buyers.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A corrugated cardboard includes an outer cardboard, an inner cardboard on one side of the outer cardboard, a paper sheet clamp between the outer cardboard and the inner cardboard, forming an outer interlayer between the paper sheet clamp and the outer cardboard, and an inner interlayer between the paper sheet clamp and the inner cardboard. A film is pasted on the surface of the outer cardboard away from the paper sheet clamp. A corrugated paper core is filled between the outer interlayer and the inner interlayer, and the corrugated paper cores on both sides are arranged at 90°. A plurality of evenly spaced grooves are formed on the inner cardboard, the grooves penetrating the inner interlayer, and a drying sheet is placed in the groove.

[0008] The corrugated paper cores in the outer and inner layers are arranged perpendicularly to each other. By crisscrossing each other, pressure or load can be effectively distributed, preventing single-point overload and thus improving the overall structural stability. This makes the corrugated cardboard stronger. At the same time, the film on the outer cardboard is to prevent moisture in the outside air from wetting the cardboard and causing it to crack. Of course, by setting a drying sheet on the inner cardboard, external air is prevented from entering the interior of the corrugated cardboard and soaking the inner cardboard.

[0009] Preferably, a hole is formed between the corrugated paper core and the cardboard, and two support columns are inserted into the hole. The two support columns intersect at the middle position of the corrugated paper core and are arranged at 90° to each other. One of the support columns is located in the corrugated paper core of the outer layer, and the other support column is located in the corrugated paper core of the inner layer. Both support columns are injection molded from polypropylene material using an injection molding machine.

[0010] A long, narrow through-slot is formed between the corrugated core, the outer cardboard, and the cardboard sheet. Support columns can be inserted into this slot to provide structural support for the entire carton. The support columns in the inner layer are horizontally positioned, while those in the outer layer are vertically positioned. As will be explained later, the carton is equipped with locking columns. When the vertical support columns are under stress, the horizontally positioned support columns can transfer the pressure to the locking columns, thus distributing the pressure and further improving the corrugated cardboard's compressive strength.

[0011] Preferably, a corrugated cardboard packaging box is made of the aforementioned corrugated cardboard and includes a box body. Two locking posts are slidably installed on each of the four side walls of the box body. The axis of the locking posts is parallel to the vertical axis of the box body, and the two locking posts are located on the left and right sides of the side walls of the box body, respectively. A lower locking member is installed at the bottom of the box body, and an upper locking member is installed at the top of the box body. When the box body is filled with products and the lid is ready to be closed, the upper locking member at the top of the box body pushes the locking posts down so that they enter the lower locking member.

[0012] The packaging box is first cut from a piece of corrugated cardboard into a predetermined shape, then creases are pressed in, and finally folded along the creases to form the box body. Because the boxes need to be stacked during transportation to facilitate overall product transport, the bottom box is subjected to pressure from the top box during stacking. This can cause the side walls of the bottom box to deform due to external force, and the joints between the side walls may crack, leading to the collapse of the stacked boxes and damage to the contents. Therefore, multiple locking posts are used to support the packaging box. When in use, the box cover is placed on the box, and the upper locking element on the cover presses against the lower locking element, causing it to engage with the lower locking element. The upper and lower locking elements then lock the middle locking post, ensuring that the locking post supports the box under pressure and prevents it from collapsing.

[0013] Preferably, the lower locking component includes a sub-limiting frame, a limiting cylinder, and a female limiting frame. The packaging box body has multiple lower through holes, all located at the four corners of the bottom of the packaging box body. A sub-limiting frame is placed at one end of each lower through hole, located inside the packaging box. Each sub-limiting frame consists of two limiting cylinders, the inside of which is funnel-shaped, and the outside of which is frustum-shaped. A female limiting frame is placed at the other end of each lower through hole, located outside the packaging box body. One end of the female limiting frame extends into the lower through hole and engages with the sub-limiting frame. The length of the sub-limiting frame entering the lower through hole is 'a', and the length of the female limiting frame entering the lower through hole is 'b'. The engagement ensures that the combined length of 'a' and 'b' is consistent with the thickness of the corrugated cardboard. The other end of the female limiting frame has an arc-shaped protrusion.

[0014] The lengths of the sub-limiting frame and the mother-limiting frame entering the lower through hole are limited, ensuring that the length of the joint between the sub-limiting frame and the mother-limiting frame is equal to the thickness of the cardboard. This prevents the sub-limiting frame from compressing the cardboard and causing damage when the locking pin is under pressure. At the same time, the other end of the mother-limiting frame has an arc-shaped protrusion, which supports the bottom of the cardboard and provides a certain clearance from the ground, preventing liquid from affecting the bottom of the carton. The two limiting cylinders of the sub-limiting frame are funnel-shaped, making it easier for the locking pin to enter and lock. Under pressure, the locking pin can be stuck on the inner wall of the limiting cylinder, preventing the locking pin from getting stuck on the top plate after the packaging box is opened, which would make the top plate difficult to open.

[0015] Preferably, the side walls of the packaging box body are provided with side cardboard, one side of which is inclined, and the other side of which abuts against the top of the packaging box body. The side cardboard has a plurality of evenly arranged circular holes. One side of the side cardboard is provided with a support frame placed in the circular hole. The locking post is slidably connected to the support frame. The other side of the side cardboard is provided with a buckle placed in the circular hole. The buckle engages with the support frame, and the buckles on two adjacent side cardboards have different shapes. The end of the buckle away from the circular hole on one side is convex, and the end of the buckle away from the circular hole on the other side is concave. This allows two adjacent buckles to cooperate when the corrugated cardboard is assembled into a packaging box. The locking post has a protrusion. When the locking post moves to a designated position, the protrusion abuts against the support frame.

[0016] The buckles on adjacent side panels have different shapes; one side has a raised buckle, while the other side has a recessed buckle. This allows the buckles on both sides to engage when the corrugated cardboard is assembled into a packaging box. Of course, before installation, round holes need to be made in the side panels to place the support frame into the holes and secure it with the buckles. The buckles on both sides allow the packaging box to be reused multiple times, making it more environmentally friendly. The locking post has a protrusion. When the locking post is moved to the designated position, the protrusion abuts against the support frame, preventing the locking post from being accidentally lifted when the top panel is raised, which would cause the packaging box to lose its support structure and require reinstallation. Therefore, the protrusion facilitates the opening and closing of the top panel.

[0017] Preferably, the upper locking component includes a top plate, a pushing block, and a fixing block. The top of the packaging box body is provided with a top plate, and the top plate has multiple upper through holes. The positions of the multiple upper through holes correspond one-to-one with the positions of the lower through holes. One side of the top plate is provided with a pushing block placed in the upper through hole. The pushing block has a circular groove. The other side of the top plate is provided with a fixing block placed in the upper through hole. The fixing block extends into the upper through hole and engages with the pushing block. The top of the fixing block has a recessed pit, which cooperates with a protrusion.

[0018] Preferably, a limiting piece is fixedly installed on the sub-limiting frame, and trapezoidal grooves are provided on both sides of the limiting piece. After the packaging box body is assembled, the side cardboard on both sides abuts against the trapezoidal grooves.

[0019] By creating trapezoidal grooves on the limiting plates of the sub-limiting frame, the combined sideboards can fit into the trapezoidal grooves. Since the other side of the sideboards abuts against the top of the packaging box body, the pressure on the top of the carton can be distributed through the sideboards, allowing the pressure generated to be transmitted to the mother limiting frame through the limiting plates, thus making the carton more resistant to pressure.

[0020] Preferably, one side surface of the side cardboard is provided with Velcro, which is located on the side of the side cardboard near the buckle. After the packaging box body is assembled, the Velcro on both sides are attached to each other, and the two side cardboards are connected together by Velcro and buckle, so that the packaging box can be used repeatedly.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. When packaging items, the top plate is placed on the corrugated cardboard box. When the top plate is pushed down to close, the upper locking piece on the top of the corrugated cardboard box pushes the locking pin down, so that it enters the lower locking piece. The upper and lower locking pieces lock the middle locking pin, so that when the carton is subjected to a certain pressure, the locking pin can support the pressure generated, ensuring the strength of the corrugated cardboard box, while improving the convenience of use for manufacturers and buyers.

[0023] 2. The corrugated cardboard box is structurally supported by support columns. However, the support columns in the inner layer are arranged horizontally, while the support columns in the outer layer are arranged vertically. As will be explained later, the packaging box is equipped with locking columns. When the vertical support columns are under stress, the horizontally arranged support columns can transfer the pressure to the locking columns, thus distributing the pressure and further improving the compression resistance of the corrugated cardboard.

[0024] 3. The other end of the female limiting frame has an arc-shaped protrusion, which gives the bottom of the cardboard a certain gap from the ground, preventing liquid from affecting the bottom of the carton. At the same time, the top of the fixing block has a recessed pit. The recessed pit makes the packaging boxes more stable when stacked. The two limiting cylinders of the sub-limiting frame are funnel-shaped, making it easier for the locking pin to enter and lock. The locking pin can be locked onto the inner wall of the limiting cylinder, preventing the locking pin from opening with the top plate after the packaging box is opened, thus preventing the packaging box from losing its support. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the unfolded structure of the packaging box of the present invention;

[0026] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0027] Figure 3 This is a three-dimensional structural diagram of the packaging box of the present invention;

[0028] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0029] Figure 5 This is an enlarged structural schematic diagram of the fixing block in this invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of the cardboard in this invention;

[0031] Figure 7 This is an enlarged structural schematic diagram of the locking post in this invention;

[0032] Figure 8 This is a three-dimensional structural diagram of the support frame in this invention.

[0033] In the diagram: 1. Packaging box body; 101. Inner cardboard; 102. Corrugated paper core; 103. Paper sheet clamp; 104. Outer cardboard; 105. Support column; 106. Hole; 2. Side cardboard; 3. Support frame; 4. Locking column; 5. Sub-limiting frame; 6. Limiting piece; 7. Trapezoidal groove; 8. Limiting cylinder; 9. Top plate; 10. Fixing block; 11. Recess; 12. Female limiting frame; 13. Protrusion; 14. Buckle; 15. Raised; 16. Pushing block; 17. Lower through hole; 18. Upper through hole; 19. Circular groove; 20. Velcro; 21. Circular hole. Detailed Implementation

[0034] Please see Figures 1 to 8 This invention provides a corrugated cardboard and its packaging box, the technical solution of which is as follows:

[0035] A corrugated cardboard includes an outer cardboard 104, an inner cardboard 101 on one side of the outer cardboard 104, a paper sheet clamp 103 between the outer cardboard 104 and the inner cardboard 101, forming an outer interlayer between the paper sheet clamp 103 and the outer cardboard 104, and an inner interlayer between the paper sheet clamp 103 and the inner cardboard 101. A film is pasted on the surface of the outer cardboard 104 away from the paper sheet clamp 103. A corrugated paper core 102 is filled between the outer interlayer and the inner interlayer, and the corrugated paper cores 102 on both sides are arranged at 90°. A plurality of evenly arranged grooves are opened on the inner cardboard 101, the grooves penetrate the inner interlayer, and a drying sheet is placed in the groove.

[0036] When producing corrugated cardboard, the outer cardboard 104 is first laid flat on the equipment. The corrugated core 102 is then placed face up on the outer cardboard 104. The equipment uses glue to attach the corrugated core 102 to the outer cardboard 104. Then, the sealing paper clip 103 is placed on top and connected with glue as well. When placing another corrugated core 102, it needs to be rotated 90° so that the corrugation directions of the two corrugated cores 102 in the outer and inner layers are perpendicular to each other. This cross-setting effectively disperses pressure or load, prevents single-point overload, and improves the stability of the overall structure, thus increasing the strength of the corrugated cardboard. The film on the outer cardboard 104 is to prevent moisture from the outside air from wetting the cardboard and causing it to crack. The drying sheet on the inner cardboard 101 prevents outside air from entering the interior of the corrugated cardboard and contaminating it.

[0037] A hole 106 is formed between the corrugated paper core 102 and the cardboard. Two support pillars 105 are inserted into the hole 106. The two support pillars 105 are intersected at the middle of the corrugated paper core 102 and are arranged at a 90° angle to each other. One support pillar 105 is located in the outer corrugated paper core 102 and the other support pillar 105 is located in the inner corrugated paper core 102. Both support pillars 105 are injection molded from polypropylene material using an injection molding machine.

[0038] Because a long, narrow through-groove is formed between the corrugated core 102, the outer cardboard 104, and the paperboard clamp 103, the support column 105 can be inserted into the through-groove to provide structural support for the entire carton. Since the corrugated directions of the two corrugated cores 102 in the outer and inner layers are perpendicular to each other, the long, narrow through-grooves on both sides are also perpendicular to each other, and the two inserted support columns are also intersecting each other. It should be noted that the support column 105 in the inner layer is horizontally positioned, while the support column 105 in the outer layer is vertically positioned. As will be explained later, the packaging box is equipped with a locking column 4. When the vertical support column 105 is under stress, the horizontally positioned support column 105 can transfer the pressure to the locking column 4, thus distributing the pressure and further improving the compressive strength of the corrugated cardboard.

[0039] A corrugated cardboard packaging box is made of the aforementioned corrugated cardboard and includes a packaging box body 1. Two locking pins 4 are slidably installed on each of the four side walls of the packaging box body 1. The axis of the locking pins 4 is parallel to the vertical axis of the packaging box body 1, and the two locking pins 4 are located on the left and right sides of the side walls of the packaging box body 1, respectively. A lower locking component is installed at the bottom of the packaging box body 1, and an upper locking component is installed at the top of the packaging box body 1. When the packaging box body 1 is filled with products and the lid is ready to be closed, the upper locking component at the top of the packaging box body 1 pushes the locking pins 4 down so that they enter the lower locking component.

[0040] The packaging box is first cut into a predetermined shape from a piece of corrugated cardboard, then creases are pressed in, and finally folded through the creases to form the main body 1 of the packaging box. Because the packaging boxes need to be stacked during transportation to facilitate the overall transport of the product, the bottom packaging box will be subjected to the pressure of the top packaging box during stacking. This will cause the side wall of the bottom packaging box to deform due to external force and crack at the joint of the side wall, causing the stacked packaging boxes to collapse and damage the contents. Therefore, multiple locking pins 4 are used to support the packaging box. When in use, the packaging box cover is placed on the packaging box, and the upper locking piece installed on the cover plate presses the lower locking pin 4, causing it to enter the lower locking piece. The upper and lower locking pieces lock the middle locking pin 4, so that when the carton is subjected to a certain pressure, the locking pin 4 can support the pressure generated and prevent the carton from collapsing.

[0041] The lower locking component includes a sub-limiting frame 5, a limiting cylinder 8, and a female limiting frame 12. Multiple lower through holes 17 are provided on the packaging box body 1, all located at the four corners of the bottom of the packaging box body 1. A sub-limiting frame 5 is placed at one end of each lower through hole 17, located inside the packaging box. Each sub-limiting frame 5 is composed of two limiting cylinders 8, with the inside of the limiting cylinder 8 being funnel-shaped and the outside being frustum-shaped. A female limiting frame 12 is placed at the other end of each lower through hole 17, located outside the packaging box body 1. One end of the female limiting frame 12 extends into the lower through hole 17 and engages with the sub-limiting frame 5. The length of the sub-limiting frame 5 entering the lower through hole 17 is 'a', and the length of the female limiting frame 12 entering the lower through hole 17 is 'b'. The engagement ensures that the combined length of 'a' and 'b' is consistent with the thickness of the corrugated cardboard. The other end of the female limiting frame 12 is provided with an arc-shaped protrusion 13.

[0042] Before packaging, the cardboard needs to be processed by punching holes at corresponding positions. The sub-limiting frame 5 is then placed inside, with its two limiting cylinders 8 entering the lower through holes 17 on the cardboard. The cardboard is then flipped over, and glue is applied to the female limiting frame 12. The female limiting frame 12 is then inserted into the lower through hole 17, causing it to engage with the sub-limiting frame 5. This clamps and limits the cardboard in the middle, and also restricts the length of the sub-limiting frame 5 and female limiting frame 12 within the lower through hole 17. The length of the joint between the sub-limiting frame 5 and female limiting frame 12 is equal to the thickness of the cardboard, preventing pressure on the locking post 4 from affecting the sub-limiting frame. When the support frame 5 is squeezed, the sub-support frame 5 compresses the cardboard, causing damage to the cardboard. At the same time, the other end of the mother support frame 12 has an arc-shaped protrusion 13, which supports the bottom of the cardboard and gives it a certain gap from the ground, preventing liquid from affecting the bottom of the carton. The two limiting cylinders 8 of the sub-support frame 5 are funnel-shaped, making it easier for the locking pin 4 to enter and lock. At the same time, when under pressure, the locking pin 4 can be stuck on the inner wall of the limiting cylinder 8, preventing the locking pin 4 from getting stuck on the top plate 9 after the packaging box is opened. This would prevent the locking pin from being lifted when the top plate 9 is opened, requiring the user to reinsert the locking pin into the support frame 3, thus improving the convenience for the user when packaging or disassembling.

[0043] Sideboards 2 are provided on the side walls of the packaging box body 1. One side of the sideboard 2 is inclined, and the other side of the sideboard 2 abuts against the top of the packaging box body 1. Multiple evenly arranged round holes 21 are provided on the sideboard 2. A support frame 3 is provided on one side of the sideboard 2 and placed in the round hole 21. The locking post 4 is slidably connected to the support frame 3. The other side of the sideboard 2 is provided with a buckle 14 placed in the round hole 21. The buckle 14 is engaged with the support frame 3. The buckles 14 on two adjacent sideboards 2 have different shapes. The end of the buckle 14 away from the round hole 21 on one side is protruding, and the end of the buckle 14 away from the round hole 21 on the other side is concave. When the corrugated cardboard is assembled into a packaging box, the two adjacent buckles 14 cooperate with each other. The locking post 4 is provided with a protrusion 15. When the locking post 4 moves to the designated position, the protrusion 15 abuts against the support frame 3. A limiting piece 6 is fixedly installed on the sub-limiting frame 5. Trapezoidal grooves 7 are provided on both sides of the limiting piece 6. After the packaging box body 1 is assembled, the side cardboard 2 on both sides abuts against the trapezoidal grooves 7. A Velcro 20 is provided on one side surface of the side cardboard 2. The Velcro 20 is located on the side of the side cardboard 2 near the buckle 14. After the packaging box body 1 is assembled, the Velcro 20 on both sides are attached to each other.

[0044] The side cardboard 2 is used to connect the two side cardboards of the packaging box. One side of the side cardboard 2 is inclined, and this inclined side can be formed by cutting a whole piece of cardboard. When the two cardboards are glued together, they can be glued together using the Velcro 20 on the side cardboard 2, so that the two side cardboards 2 of the packaging box are joined together. Of course, because the buckles 14 on the two adjacent side cardboards 2 are different in shape, one side buckle 14 is raised and the other side buckle 14 is recessed, so when the corrugated cardboard is assembled into a packaging box, the buckles 14 on both sides can be locked together. The two side cardboards 2 are connected by the Velcro 20 and the buckles 14. Together, the packaging box can be reused repeatedly. Of course, before the buckle 14 is installed, a round hole 21 needs to be made on the side cardboard 2, the support frame 3 is placed in the round hole 21, and the support frame 3 is fixed by the buckle 14. By making a trapezoidal groove 7 on the limiting piece 6 on the sub-limiting frame 5, the combined side cardboard 2 can fit into the trapezoidal groove 7. Since the other side of the side cardboard 2 abuts against the top of the packaging box body 1, the pressure on the top of the carton can be distributed through the side cardboard 2 to the locking post 4 after the pressure is applied. The pressure generated is transmitted to the mother limiting frame 12 through the limiting piece 6, making the carton more resistant to pressure.

[0045] The upper locking component includes a top plate 9, a push block 16, and a fixing block 10. The top of the packaging box body 1 is provided with a top plate 9, and multiple upper through holes 18 are provided on the top plate 9. The positions of the multiple upper through holes 18 correspond one-to-one with the positions of the lower through holes 17. A push block 16 is provided on one side of the top plate 9 and placed in the upper through hole 18. A circular groove 19 is provided on the push block 16. A fixing block 10 is provided on the other side of the top plate 9 and placed in the upper through hole 18. The fixing block 10 extends into the upper through hole 18 and engages with the push block 16. A recess 11 is provided on the top of the fixing block 10 and engages with the protrusion 13.

[0046] Of course, the pushing block 16 and fixing block 10 on the top plate 9 are also fixed and installed by opening round holes. When in use, the top plate 9 is placed on the packaging box body 1 and closed downwards. When the top plate 9 is closed, the pushing block 16 abuts against the locking post 4, so that the locking post 4 enters the round groove 19 on the pushing block 16. By squeezing, the locking post 4 is pushed into the lower female limiting frame 12. Of course, because it is a round groove 19, the round groove 19 will not jam with the locking post 4, so that the locking post 4 is lifted when the top plate 9 is opened. The top of the fixing block 10 has a recessed pit 11. By setting the recessed pit 11, when the packaging boxes are stacked, the protrusion 13 on the bottom female limiting frame 12 of the upper packaging box can fit into the recessed pit 11, making the stacking of packaging boxes more stable.

[0047] When using it, cut the cardboard into the shape of a cross and insert the support column 105 into the cardboard through the side gap. It should be noted that the support column 105 in the inner layer is set horizontally, while the support column 105 in the outer layer is set vertically. Bend the cardboard so that it can form a packaging box after folding.

[0048] Before packaging, the cardboard needs to be processed. Holes are punched at corresponding positions on the cardboard, including the bottom, top plate 9, and side cardboard 2 of the carton. The sub-limiting frame 5 is then placed inside, with the two limiting cylinders 8 of the sub-limiting frame 5 entering the lower through holes 17 on the cardboard. The cardboard is then flipped over, and glue is applied to the mother limiting frame 12. The mother limiting frame 12 is then placed into the lower through holes 17, so that the mother limiting frame 12 and the sub-limiting frame 5 interlock. The cardboard in the middle is clamped and limited by the mother limiting frame 12 and the sub-limiting frame 5.

[0049] Place the support frame 3 into the round hole 21 and fix it with the buckle 14. Note that the buckles 14 on the two adjacent side cards 2 have different shapes. The end of one buckle 14 away from the round hole 21 is raised, and the end of the other buckle 14 away from the round hole 21 is recessed. When the corrugated cardboard is assembled into a packaging box, the two adjacent buckles 14 cooperate with each other. At the same time, place the locking post 4 on the support frame 3 and let it move on it. When the two sides of the cardboard are glued together, they can be glued together with the Velcro 20 on the side cards 2, so that the two side cards 2 of the packaging box are joined together. Of course, because the buckles 14 on the two adjacent side cards 2 have different shapes, one side buckle 14 is raised and the other side buckle 14 is recessed, so that the buckles 14 on both sides can be locked together when the corrugated cardboard is assembled into a packaging box.

[0050] Of course, the pushing block 16 and fixing block 10 on the top plate 9 are also fixed and installed by opening round holes. When using, the top plate 9 is placed on the packaging box body 1 and closed downwards. The pushing block 16 abuts against the locking post 4, so that the locking post 4 enters the round groove 19 on the pushing block 16. By squeezing, the locking post 4 is pushed into the lower female limit frame 12. Of course, because it is a round groove 19, it will not jam with the locking post 4, making it difficult to open the top plate 9. At the same time, the locking post 4 is provided with a protrusion 15. When the locking post 4 moves to the designated position, the protrusion 15 abuts against the support frame 3, so as to prevent the locking post 4 from moving upward with the top plate 9 when the top plate 9 is taken off, which would require the user to reinsert the locking post into the support frame 3, thus improving the convenience of the user when packaging or disassembling.

[0051] By opening a trapezoidal groove 7 on the limiting piece 6 on the sub-limiting frame 5, the combined side cardboard 2 can fit into the trapezoidal groove 7. Since the other side of the side cardboard 2 abuts against the top of the packaging box body 1, the pressure on the top of the carton can be distributed through the side cardboard 2 to the locking post 4 after the pressure is applied, so that the pressure generated can be transmitted to the mother limiting frame 12 through the limiting piece 6.

[0052] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A corrugated paperboard packaging box, characterized in that, The packaging box is made of corrugated cardboard; the corrugated cardboard includes an outer cardboard (104), an inner cardboard (101) is provided on one side of the outer cardboard (104), a paper sheet clamp (103) is provided between the outer cardboard (104) and the inner cardboard (101), an outer interlayer is formed between the paper sheet clamp (103) and the outer cardboard (104), an inner interlayer is formed between the paper sheet clamp (103) and the inner cardboard (101), a film is pasted on the surface of the outer cardboard (104) away from the paper sheet clamp (103), a corrugated paper core (102) is filled between the outer interlayer and the inner interlayer, and the corrugated paper cores (102) on both sides are arranged at 90° intersection, and a plurality of evenly arranged grooves are opened on the inner cardboard (101), the grooves penetrate the inner interlayer, and a drying sheet is placed in the groove; A hole (106) is formed between the corrugated paper core (102) and the cardboard. Two support pillars (105) are inserted into the hole (106). The two support pillars (105) are intersected at the middle of the corrugated paper core (102) and are arranged at a 90° angle to each other. One support pillar (105) is located in the outer corrugated paper core (102), and the other support pillar (105) is located in the inner corrugated paper core (102). Both support pillars (105) are injection molded from polypropylene material using an injection molding machine. The packaging box includes a packaging box body (1). Two locking posts (4) are slidably installed on each of the four side walls of the packaging box body (1). The axis of the locking post (4) is parallel to the vertical axis of the packaging box body (1), and the two locking posts (4) are located on the left and right sides of the side wall of the packaging box body (1). A lower locking member is installed at the bottom of the packaging box body (1) to support the locking post (4), and an upper locking member is installed at the top of the packaging box body (1) to limit the locking post (4). When the packaging box body (1) is filled with products and the box lid is ready to be closed, the upper locking member at the top of the packaging box body (1) pushes the locking post (4) down so that it enters the lower locking member. The lower locking component includes a sub-limiting frame (5), a limiting cylinder (8), and a female limiting frame (12). The packaging box body (1) has multiple lower through holes (17), all located at the four corners of the bottom of the packaging box body (1). A sub-limiting frame (5) is placed at one end of each lower through hole (17). The sub-limiting frame (5) is located inside the packaging box. Each sub-limiting frame (5) is composed of two limiting cylinders (8). The inside of each limiting cylinder (8) is funnel-shaped, and the outside of each limiting cylinder (8) is frustum-shaped. A female limiting frame (12) is placed at the other end of the perforation (17). The female limiting frame (12) is located outside the packaging box body (1). One end of the female limiting frame (12) extends into the lower through hole (17) and is engaged with the sub-limiting frame (5). The length of the sub-limiting frame (5) entering the lower through hole (17) is a, and the length of the female limiting frame (12) entering the lower through hole (17) is b. The engagement makes the combined length of a and b consistent with the thickness of the corrugated cardboard. The other end of the female limiting frame (12) is provided with an arc-shaped protrusion (13). The packaging box body (1) has side cardboard (2) on its side wall. One side of the side cardboard (2) is inclined, and the other side of the side cardboard (2) abuts against the top of the packaging box body (1). The side cardboard (2) has a plurality of evenly arranged round holes (21). One side of the side cardboard (2) has a support frame (3) placed in the round hole (21). The locking post (4) is slidably connected to the support frame (3). The other side of the side cardboard (2) has a buckle (14) placed in the round hole (21). The buckle (14) engages with the support frame (3), and the buckles (14) on two adjacent side cardboards (2) have different shapes. One side of the buckle (14) is raised at the end away from the round hole (21), and the other side of the buckle (14) is recessed at the end away from the round hole (21), so that when the corrugated cardboard is assembled into a packaging box, the two adjacent buckles (14) cooperate with each other. The locking post (4) is provided with a protrusion (15). When the locking post (4) moves to the designated position, the protrusion (15) abuts against the support frame (3).

2. A corrugated cardboard packaging box according to claim 1, characterized in that... The upper locking component includes a top plate (9), a pushing block (16), and a fixing block (10). The top of the packaging box body (1) is provided with a top plate (9). The top plate (9) has multiple upper through holes (18). The positions of the multiple upper through holes (18) correspond one-to-one with the positions of the lower through holes (17). One side of the top plate (9) is provided with a pushing block (16) placed in the upper through hole (18). The pushing block (16) has a circular groove (19). The other side of the top plate (9) is provided with a fixing block (10) placed in the upper through hole (18). The fixing block (10) extends into the upper through hole (18) and engages with the pushing block (16). The top of the fixing block (10) has a recess (11). The recess (11) cooperates with the protrusion (13).

3. A corrugated paperboard packaging carton according to claim 1, wherein A limiting piece (6) is fixedly installed on the sub-limiting frame (5). Trapezoidal grooves (7) are provided on both sides of the limiting piece (6). After the packaging box body (1) is assembled, the side cardboard (2) on both sides abuts against the trapezoidal grooves (7).

4. A corrugated paperboard packaging carton according to claim 1, wherein The side cardboard (2) has Velcro (20) on one side surface. The Velcro (20) is located on the side of the side cardboard (2) near the buckle (14). After the packaging box body (1) is assembled, the Velcro (20) on both sides are attached to each other.

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