Anti-extrusion corrugated paper packaging box

Abstract

The invention relates to the technical field of cardboard boxes, in particular to an anti-extrusion corrugated paper packaging box which comprises a paperboard and a cover plate, creases are arranged on the paperboard, the paperboard defines a box-shaped box body with the upper end and the lower end open through the creases, the upper end and the lower end of each crease are arranged as outer box corners, and the upper end and the lower end of the box body are closed or opened through the cover plate. The combined wrap angles, the locking pieces and the locking pieces are arranged, the combined wrap angles can be installed at the outer box corners in the box body manufacturing process in a gluing mode, manual secondary assembly is avoided, the locking pieces lock the first wrap angles and the second wrap angles in a hinged mode, the box body is prevented from being extruded and pulled in the four directions of a paperboard, and the box body is prevented from being damaged. The box body is sealed by the locking pieces along with the cover plate, and then the locking pieces are locked, at the moment, the outer box corners are wrapped by the combined wrap angles, the purpose of protecting the bearing structure of the box body is achieved, and therefore the situation that the corrugated paper packaging box is extruded from the outside to damage the structure of the box body is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of paper shell boxes, in particular to an anti-extrusion corrugated paper packaging box. Background Art

[0002] Corrugated paper packaging boxes are the most widely used packaging products, and their usage ranks first among packaging products. In addition to protecting goods and facilitating warehousing and transportation, they also play a role in beautifying and promoting goods. Corrugated paper packaging boxes are green and environmentally friendly products. They are beneficial to environmental protection, convenient for loading and unloading and transportation, and have the characteristics of lightweight, recyclable, and easy to degrade. General corrugated paper packaging boxes have good anti-extrusion ability because of the square structure of the box body. The material is corrugated paper. If the eight outer corners of the corrugated paper packaging box are subjected to greater extrusion or pulling force, their external structure will change, and even the box body will be damaged, which will reduce the anti-extrusion ability of the corrugated paper packaging box and fail to protect the goods in the corrugated paper packaging box. When the above problems occur on the corrugated paper packaging box, the goods in the box cannot be effectively protected.

[0003] In response to the above problems, the prior art provides some solutions, such as installing corner wraps at the eight outer corners of corrugated paper packaging boxes. The material of the corner wraps can be light metal or plastic, which can enhance the structural strength of the packaging box against extrusion without changing the structure of the box itself. However, the convenience of unpacking will be affected, and the box with the corner wraps installed must be in a state to be loaded with goods, that is, a rectangle or square, which increases manual secondary assembly and is not conducive to industrial rapid packaging; for example, the invention patent with patent application number CN202123338543.9 provides an anti-deformation carton, in which a protective corner wrap assembly is provided at the outer corner of the carton body, a vertical support assembly is provided on the vertical edge of the inner side of the carton body, and a transverse reinforcement strip is provided on the inner side of the carton body between the vertical support assemblies. Therefore, the corners of the carton body can be protected by the protective corner wrapping assembly, and the corners can be prevented from being concave or deformed when impacted, so as to protect the contents. An independent vertical support assembly is provided to improve the load-bearing effect in the vertical direction, and at the same time buffer the impact stress from the surrounding area to ensure that the inner corners of the carton body do not collapse accidentally. However, this solution requires the box to be in a sealed state before the protective corner wrapping assembly can be installed on the outer box corners. Therefore, manual secondary assembly is required, and the vertical support assembly arranged in the box reduces the available space in the box. Summary of the invention

[0004] The purpose of the present invention is to provide an anti-squeezing corrugated paper packaging box to solve the problem that if the eight outer corners of the anti-squeezing corrugated paper packaging box are subjected to large squeezing force or pulling force, its external structure will change, and even the box body will be damaged, which will reduce the anti-squeezing ability of the corrugated paper packaging box and fail to protect the goods in the corrugated paper packaging box. When the above problems occur on the corrugated paper packaging box, the safety of the goods in the box cannot be effectively protected, while solving the shortcomings of the existing technical solutions.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A compression-resistant corrugated paper packaging box comprises a cardboard and a cover plate, wherein the cardboard is provided with a fold, and the cardboard is enclosed by the fold to form a square frame-shaped box body with upper and lower ends open, the upper and lower ends of the fold are set as outer box corners, the cardboard enclosed position is fixed by carton nails, and the cover plate closes or opens the upper and lower ends of the box body, specifically, a combined wrapping angle is respectively glued to eight outer box corners of the box body, and the combined wrapping angle strengthens the compression-resistant structure of the box body by locking and wrapping the outer box corners, the combined wrapping angle comprises a first wrapping angle, a second wrapping angle and a cover angle, the first wrapping angle and the second wrapping angle are arranged on both sides of the cardboard and are mirror-symmetrical along the fold, a locking member is arranged between the first wrapping angle and the second wrapping angle, the locking member connects the first wrapping angle and the second wrapping angle in a hinged manner, a locking member is connected between the first wrapping angle and the cover angle, and the locking member comprises a locking pin installed in the first wrapping angle, and when the cover plate closes the upper and lower ends of the box body, the cover angle causes the locking pin to lock the locking member through the rotation of the cover plate.

[0007] It is easy to understand that when the corrugated paper packaging box is in the process of extrusion and shaping, the combined corner wrapping can be installed on the folds of the cardboard and the outer box corners by gluing as the machine extrudes. When the corrugated paper packaging box is packaged, as the cover plate is flipped, the combined corner wrapping installed on the cardboard is deformed from the unfolded state to a pyramid structure, avoiding the need in the prior art for the packaging box to be in a state where the goods are packaged before the corner wrapping protecting the outer box corner structure can be installed, thereby avoiding manual secondary assembly, reducing work intensity, and facilitating box packaging. At the same time, the structure of the combined wrap angle can be changed along with the shape of the corrugated paper packaging box, so that the corrugated paper packaging box can still realize the function of storage and folding after the combined wrap angle is installed; at the same time, the locking piece locks the first wrap angle and the second wrap angle in a hinged manner, so as to prevent the box body from being subjected to extrusion and pulling from the four directions of the cardboard. The locking piece closes the box body along with the cover plate and then locks the locking piece. At this time, the combined wrap angle wraps the outer box corner to protect the load-bearing structure of the box body, thereby preventing the corrugated paper packaging box from being subjected to external extrusion and causing damage to its box structure.

[0008] Preferably, the locking member includes a locking groove, a first locking pin and a second locking pin, the locking groove is opened in the first wrap angle and the second wrap angle, the first locking pin and the second locking pin are rotatably connected at one end, and are slidably connected in the locking groove at the other end, the first locking pin is provided with a plurality of concave cylinders arranged with gaps outside the locking groove away from the first locking pin, the second locking pin is provided with a plurality of convex cylinders, the convex cylinders are arranged with gaps at one end away from the second locking pin, the gap width between two of the concave cylinders is equal to the height of the convex cylinders, the plurality of convex cylinders are respectively located between the plurality of concave cylinders, and a rotating portion is also provided at the upper and lower ends of the convex cylinder, and the rotating portion is convex in shape.

[0009] It is easy to understand that the convex cylinder is inserted into the gap between the adjacent concave cylinders, so that the first locking pin and the second locking pin are connected by a hinge structure, so that the first locking pin and the second locking pin can rotate with the first wrap angle and the second wrap angle, and the hinge structure is a rigid connection. When the first wrap angle and the second wrap angle are pulled or squeezed from the outside, the first locking pin and the second locking pin can slide in the locking groove. When the first wrap angle and the second wrap angle are at 90°, the above-mentioned hinge structure can wrap the fold, thereby playing a role in protecting the outer box corner structure; at the same time, the setting of the convex circular rotating part expands the gap between the adjacent concave cylinders to a certain extent, so that the convex cylinder and the concave cylinder are in an interference fit state, so that a certain damping is generated between the contact surfaces of the convex cylinder and the concave cylinder, thereby ensuring that when the box is in use, the right-angled sides of the box will not be slightly deformed due to the box itself or external forces. While protecting the outer box corner structure, it avoids the box from being slightly deformed due to itself or external forces, which makes it impossible to quickly load the goods.

[0010] Preferably, the upper and lower ends of the outer side wall of the concave cylinder are provided with rotation grooves rotatably connected to the rotation part, and the rotation groove is "L"-shaped and the opening direction is opposite to the paperboard.

[0011] It is easy to understand that, since there is an extrusion shaping step in the production process of the cardboard for storage and transportation, in this step, after the machine aligns and closes the cardboard, the machine applies pressure from top to bottom. In order to make it easier for the convex cylinder to be squeezed into the gap of the concave cylinder, a rotating groove for the installation of the rotating part is provided in the concave cylinder, thereby avoiding that when the concave cylinder and the convex cylinder are matched and connected, the gap between the concave cylinders is enlarged due to the entry of the convex cylinder, causing the first locking pin to undergo irreversible deformation, and by turning the opening direction of the rotating groove away from the direction of the cardboard, that is, the same direction as the pressure applied by the above-mentioned machine from top to bottom, the locking member can be used in the case of an external process step. The device can be installed quickly and can be easily assembled manually. When the packaging box is put into the goods and sealed, that is, the first wrap angle and the second wrap angle are at a 90° angle, the opening direction of the rotating groove and the extrusion force exerted on the locking member have an angle of 45° between the two, so that the hinged structure formed by the convex cylinder and the concave cylinder will not be separated when the packaging box is in use, and the rotating groove is set in an "L" shape, so that when the first wrap angle and the second wrap angle are subjected to a pulling force from outside the box, the rotating part can further penetrate into the bottom of the "L"-shaped structure, so that the hinged structure formed by the convex cylinder and the concave cylinder will not be separated when the packaging box is in use, thereby ensuring the structural strength of the outer box angle to resist pulling and extrusion.

[0012] Preferably, the inner walls on the left and right sides of the locking groove are also connected with hollow semicircular arc-shaped structural protrusions, and the structural protrusions are respectively in contact with the first locking pin and the second locking pin.

[0013] It is easy to understand that when external force squeezes or pulls the box body, the force will be transmitted to the first locking pin and the second locking pin through the locking groove. As the squeezing or pulling force increases, the force borne by the first locking pin and the second locking pin will be too large, causing the first wrap angle and the second wrap angle to be debonded and separated at the glue joint with the cardboard, resulting in the combined wrap angle being unable to protect the pressure-bearing structure of the outer box corner. By adding hollow semicircular arc-shaped structural protrusions on the inner walls on the left and right sides of the locking groove, when the first locking pin and the second locking pin are subjected to squeezing or pulling force, the structural protrusions are deformed by force and are able to absorb part of the squeezing or pulling force from the outside, thereby avoiding the first wrap angle and the second wrap angle from being debonded from the cardboard, thereby ensuring the compression strength of the outer box corner structure.

[0014] Preferably, the locking assembly includes a locking groove, a locking pin and a stopping groove, the locking groove is opened in the first wrap angle and is connected to the locking groove, one end of the locking pin is slidably connected in the locking groove, and the other end extends out of the locking groove, the stopping groove is opened in the cover angle, and stopping portions for fixing the locking pin are opened on both sides of the inner wall of the stopping groove, a guide surface is provided on the locking pin, and a guide groove matching the guide surface is opened near the locking groove of the first locking pin.

[0015] It is easy to understand that when the box body is in a state to be packaged, that is, the angle between the first wrap angle and the first wrap angle is at 90°, the cover angle closes the upper and lower ends of the box body with the cover plate, and the locking pin extends from the locking groove, so that the first locking pin cannot slide along the locking groove, thereby completely fixing the angle between the first wrap angle and the second wrap angle to 90°. Since the locking pin is fixedly installed on the stopper, the locking pin is deformed as the cover angle is flipped, and the deformation wraps the connection between the cover plate and the cardboard. When squeezed or pulled by the outside world, the wrapping of the locking pin can avoid direct contact and force between the cardboard, and the hardness of the locking pin can protect the cardboard behind it from being damaged and deformed, thereby playing a role in protecting the outer box angle. After the cover angle uses the locking pin to lock the first locking pin, the cover angle, the first wrap angle and the second wrap angle form a stable pyramid structure. The pyramid structure has the advantage of strong load-bearing capacity, thereby improving the anti-extrusion strength of the combined wrap angle, thereby ensuring the integrity of the outer box angle structure.

[0016] Preferably, the cover corner is provided with fasteners arranged in gaps at the right-angled side close to the second wrap angle, and the second wrap angle is provided with buckle grooves matching the fasteners.

[0017] Preferably, the fastener and the fastener groove are arranged obliquely relative to the edge line of the upper end surface of the paperboard.

[0018] It is easy to understand that in order to improve the structural strength of the combined wrap angle, by providing fasteners arranged in a gap at the right-angled side of the cover angle close to the second wrap angle, and providing a buckle groove for matching the fastener at the second wrap angle, after the locking pin locks the first locking pin, the cover angle, the first wrap angle and the second wrap angle form a pyramid structure that abuts against each other, thereby improving the structural strength of the combined wrap angle. Furthermore, by arranging the fasteners and the buckle grooves at an angle relative to the upper end surface edge line of the cardboard, when the goods are taken out of the packaging box, the force manually applied in the direction of opening the cover plate has a certain angle with the arrangement direction of the fasteners, so that during the opening process of the cover plate, the fasteners are structurally deformed in the inclined direction, thereby facilitating disengagement from the buckle grooves. Compared with the existing wrap angles, the combined wrap angle can open the cover plate on the box body without removing it. While improving the structural strength of the outer box angle, the combined wrap angle further improves the convenience of opening the packaging box.

[0019] Preferably, the first wrap angle, the second wrap angle and the cover angle are provided with a buffer portion facing away from the paperboard and the cover plate, a cavity is provided inside the buffer portion, and the material of the buffer portion is the same as that of the combined wrap angle, which is polyethylene.

[0020] It is easy to understand that in order to prevent the cardboard from being squeezed by the machine together with the cardboard when the combined wrap angle is installed at the outer box corner during the extrusion process, the extrusion force may cause deformation of the combined wrap angle or the cardboard, causing the structure of the outer box corner to be damaged. By providing a buffer portion, the buffer portion is subjected to the extrusion force and then deformed toward the cavity, thereby reducing the extrusion force on the combined wrap angle and the cardboard. When the packaging box is in a sealed state, that is, the combined wrap angle completely locks and wraps the outer box corner, the buffer portion can also absorb a part of the impact force from the outside, thereby improving the compressive resistance of the combined wrap angle, thereby ensuring the integrity of the outer box corner structure. At the same time, all components of the present invention are supported by polyethylene, and polyethylene has good impact resistance and can resist physical impact to a certain extent. Because of its low production cost and easy injection molding, it can adapt to a certain deformation during the deformation of the combined wrap angle and is not easy to break.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention provides a combined wrap angle, a locking piece and a locking piece. The combined wrap angle can be installed at the outer box corner by gluing during the box manufacturing process to avoid manual secondary assembly. The locking piece locks the first wrap angle and the second wrap angle in a hinged manner to avoid the box body from being squeezed and pulled from the four directions of the cardboard. The locking piece closes the box body with the cover plate and then locks the locking piece. At this time, the combined wrap angle completely wraps the outer box corner to protect the box load-bearing structure, thereby avoiding the corrugated paper packaging box from being squeezed from the outside and causing damage to its box structure, thereby improving the anti-extrusion performance of the anti-extrusion corrugated paper packaging box.

[0023] 2. The present invention provides an L-shaped rotating groove. In order to ensure convenient connection between the convex cylinder and the concave cylinder during the manufacturing process of the box body, the rotating groove is arranged in the direction of the cardboard, so that the rotating part can be in the same direction as the installation line of the combined wrap angle. When the first wrap angle and the second wrap angle are in a 90° locking state, the direction of the external extrusion and pulling force on the locking member is at an angle of 45° with the opening direction of the rotating groove. When the box body is in use, the rotating part is difficult to detach from the rotating groove. While simplifying the installation process, the locking effect of the locking member is guaranteed, thereby ensuring the anti-extrusion property of the box body.

[0024] 3. The present invention provides fasteners and buckle grooves. When the cover corner closes the box body along with the cover plate, the first wrap angle and the second wrap angle and the cover corner are able to completely wrap the outer box corner. By adding fasteners and buckle grooves to the second wrap angle and the cover corner to connect the two, when the combined wrap angle is subjected to squeezing and pulling forces from multiple directions, a part of the force can be shared by the other two, so that the compressive structure of the combined wrap angle is enhanced. When the cover plate is opened, the force direction forms an angle with the arrangement direction of the fastener. When the fastener is separated from the buckle groove, the fastener will be deformed and flipped to a certain extent, thereby avoiding the problem of the cover plate being difficult to open due to the installation of the combined wrap angle.

[0025] 4. The present invention provides a buffer portion on the combined corner. In the process of carton manufacturing, the buffer portion is subjected to pressure and deformed into the cavity. In the process of gluing the combined corner and the outer box corner, the combined corner will not be deformed and the structure of the paperboard will not be deformed due to extrusion. When the packaging box is in use, the deformation of the buffer portion into the cavity can also absorb part of the extrusion force, thereby ensuring the anti-extrusion strength of the corrugated paper packaging box. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the corrugated paper packaging box of the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the state of installing the combined wrap angle at the outer box corner at A in the middle;

[0028] Figure 3 It is a schematic diagram of the overall parts structure after the buffer part is cut;

[0029] Figure 4 It is a schematic diagram of the state where the combined corner wrap is installed on the cardboard after being pressed and shaped;

[0030] Figure 5 It is a schematic diagram of the 3D overall part structure of the combined wrap angle;

[0031] Figure 6 It is a schematic diagram of the structure of the rotating groove on the concave cylinder;

[0032] Figure 7 It is a schematic diagram of the structure of the rotating part on the concave cylinder;

[0033] Figure 8 This is a schematic diagram of the state in which the "L"-shaped structure of the rotating groove restricts the rotating part when the locking member is squeezed or pulled.

[0034] In the figure: 1. box body; 101. cardboard; 1011. fold; 102. cover plate; 103. outer box corner; 2. combined wrap angle; 201. first wrap angle; 202. second wrap angle; 203. cover corner; 2031. fastener; 2032. buckle groove; 3. locking member; 301. locking groove; 3011. structural convex part; 302. first locking pin; 3021. concave cylinder; 3022. guide groove; 3023. rotating groove; 303. second locking pin; 3031. convex cylinder; 3032. rotating part; 4. locking member; 401. locking groove; 402. locking pin; 4021. guide surface; 403. stop groove; 4031. stop part; 5. buffer part; 501. cavity. DETAILED DESCRIPTION

[0035] The present invention provides an anti-extrusion corrugated paper packaging box, and the technical solution is as follows:

[0036] See also Figures 1 to 5 , an anti-extrusion corrugated paper packaging box, including a cardboard 101 and a cover plate 102, the cardboard 101 is provided with three equidistant folds 1011, the upper and lower ends of the folds 1011 are set as outer box corners 103, the cardboard 101 is surrounded by the folds 1011 to form a square frame box body 1 with open upper and lower ends, the cardboard 101 is fixed at the enclosed part by carton nails, and the cover plate 102 can close or open the upper and lower ends of the box body 1. Specifically, eight combined wrapping angles 2 are respectively glued to the eight outer box corners 103 of the box body 1, and the combined wrapping angles 2 include a first wrapping angle 201, a second wrapping angle 202 and a cover angle 203. The first wrapping angle 201 and the second wrapping angle 202 are arranged on both sides of the cardboard 101 and are mirror-symmetrical along the folds 1011. The locking piece The two ends of the cover 103 are connected to the first wrap angle 201 and the second wrap angle 202 respectively. The locking member 3 is hinged so that the paperboard 101 on both sides of the fold 1011 can resist the torsion force from the outside. The locking member 4 is connected between the first wrap angle 201 and the cover angle 203. The locking member 4 includes a locking pin 402 installed in the first wrap angle 201. When the cover plate 102 closes the upper and lower ends of the box body 1, the cover angle 203 rotates the cover plate 102 so that the locking pin 402 locks the locking member 3. The first wrap angle 201, the second wrap angle 202 and the cover angle 203 are provided with a buffer part 5 facing away from the paperboard 101 and the cover plate 102. The buffer part 5 is provided with a cavity 501. The material used for the buffer part 5 is the same as that of the combined wrap angle 2, which is polyethylene.

[0037] See also Figures 2 to 8The locking member 3 includes a locking groove 301, a first locking pin 302 and a second locking pin 303. The first wrap angle 201 and the second wrap angle 202 are provided with a locking groove 301. The first locking pin 302 and the second locking pin 303 are rotatably connected at one end and slidably connected in the locking groove 301 at the other end. A plurality of concave cylinders 3021 arranged in a gap are arranged on the first locking pin 302 and away from the locking groove 301. A plurality of convex cylinders 3031 are arranged in a gap at one end away from the second locking pin 303. The width of the gap between the two concave cylinders 3021 is equal to or greater than 1. At the height of the convex cylinder 3031, the multiple convex cylinders 3031 are respectively located between the multiple concave cylinders 3021, the rotating part 3032 is arranged at the upper and lower ends of the convex cylinder 3031, the rotating part 3032 is convex, the rotating groove 3023 is opened at the upper and lower ends of the outer wall of the concave cylinder 3021 and is rotatably connected with the rotating part 3032, the rotating groove 3023 is "L" shaped and the opening direction is away from the paperboard 101, the hollow semicircular arc-shaped structural protrusion 3011 is arranged on the inner walls of the left and right sides of the locking groove 301, and the structural protrusion 3011 is respectively in contact with the first locking pin 302 and the second locking pin 303.

[0038] See also Figures 2 to 6 The locking member 4 includes a locking groove 401, a locking pin 402 and a stop groove 403. The locking groove 401 is provided in the first wrap angle 201 and communicates with the locking groove 301. One end of the locking pin 402 is slidably connected to the locking groove 401, and the other end extends out of the locking groove 301. The stop groove 403 is provided in the cover angle 203. Stop portions 4031 for fixing the locking pin 402 are provided on both sides of the inner wall of the stop groove 403. A guide surface 4021 is provided, and a guide groove 3022 matching the guide surface 4021 is opened near the locking groove 301 of the first locking pin 302. The cover corner 203 is provided with fasteners 2031 arranged in a gap at the right angle side near the second wrap angle 202. The second wrap angle 202 is provided with a buckle groove 2032 matching the fastener 2031. The fastener 2031 and the buckle groove 2032 are inclined relative to the upper end surface edge line of the paperboard 101.

[0039] See also Figures 1 to 8When the corrugated paper packaging box is in the process of extrusion and shaping, the combined corner wrapping 2 can be installed at the fold 1011 of the paperboard 101 and the outer box corner 103 by gluing as the machine is extruded, thereby avoiding the need in the prior art that the packaging box must be in a state of packaging goods before the corner wrapping of the outer box corner 103 structure can be installed, thereby avoiding manual secondary assembly and reducing work intensity; at the same time, the convex cylinder 3031 is inserted into the gap between the adjacent concave cylinders 3021, so that the first locking pin 302 and the second locking pin 303 are connected through the hinge structure, thereby making the first locking pin The first and second locking pins 302 and 303 are able to rotate with the first and second wrap angles 201 and 202, and the hinge structure is a rigid connection. When the first and second wrap angles 201 and 202 are pulled or squeezed from the outside, the first and second locking pins 302 and 303 are able to slide in the locking groove 301. When the first and second wrap angles 201 and 202 are at 90 degrees, the hinge structure can wrap the fold 1011, thereby protecting the outer box angle 103 structure. At the same time, the convex circular rotating portion 3032 is set to a certain extent, and the gap between the adjacent concave cylinders 3021 appears. The expansion makes the convex cylinder 3031 and the concave cylinder 3021 in an interference fit state, so that a certain damping is generated between the contact surfaces of the convex cylinder 3031 and the concave cylinder 3021, thereby ensuring that when the box body 1 is in use, the right-angled side of the box body 1 will not be slightly deformed by the box body 1 itself or external forces. While protecting the outer box corner 103 structure, it avoids the box body 1 from being slightly deformed by itself or external forces, causing the goods to be unable to be quickly loaded. This process is that after the machine aligns and closes the cardboard 101, the machine applies pressure from top to bottom, in order to make it easier to squeeze the convex cylinder 3031 In the gap between the concave cylinder 3021, a rotating groove 3023 for installing the rotating part 3032 is provided in the concave cylinder 3021, thereby preventing the concave cylinder 3021 from expanding the gap between the concave cylinders 3021 due to the entry of the convex cylinder 3031 when the concave cylinder 3021 is matched and connected, so that the first locking pin 302 is not irreversibly deformed, and by turning the opening direction of the rotating groove 3023 away from the direction of the paperboard 101, that is, the same direction as the pressure applied from top to bottom by the above-mentioned machine, the locking member 3 can be quickly installed by machine without additional process steps, and can also be easily assembled manually;When the packaging box is put into the goods and sealed, that is, the first wrap angle 201 and the second wrap angle 202 are at a 90° angle, the opening direction of the rotating groove 3023 and the squeezing force applied to the locking member 3 have an angle of 45° between them, so that the hinged structure formed by the convex cylinder 3031 and the concave cylinder 3021 will not be detached when the packaging box is in use, and the rotating groove 3023 is set in an "L" shape, so that when the first wrap angle 201 and the second wrap angle 202 are subjected to a pulling force from outside the box body 1, the rotating part 3032 can further penetrate into the bottom of the "L"-shaped structure, so that the hinged structure formed by the convex cylinder 3031 and the concave cylinder 3021 will not be detached when the packaging box is in use, and its force will be transmitted to the first locking pin 302 and the second locking pin 303 through the locking groove 301. The increase of compression or pulling force will make the first locking pin 302 and the second locking pin 303 bear too much force, so that the first wrap angle 201 and the second wrap angle 202 are debonded and separated from the paperboard 101, resulting in the combined wrap angle 2 being unable to protect the pressure-bearing structure of the outer box corner 103. By adding hollow semicircular arc-shaped structural protrusions 3011 on the inner walls on the left and right sides of the locking groove 301, when the first locking pin 302 and the second locking pin 303 are subjected to compression or pulling force, the structural protrusions 3011 are deformed by force to absorb part of the compression or pulling force from the outside, thereby preventing the first wrap angle 201 and the second wrap angle 202 from being debonded from the paperboard 101, thereby ensuring the anti-compression strength of the outer box corner 103 structure and preventing the box body 1 from being subjected to compression and pulling from the four directions of the paperboard 101. ;

[0040] When the box body 1 is in a state to be packaged, that is, the angle between the first wrap angle 201 and the first wrap angle 201 is at 90°, the cover angle 203 closes the upper and lower ends of the box body 1 with the cover plate 102, and the locking pin 402 extends from the locking groove 401, so that the first locking pin 302 cannot slide along the locking groove 301, thereby completely fixing the angle between the first wrap angle 201 and the second wrap angle 202 to be 90°. Since the locking pin 402 is fixedly installed on the stopper 4031, the locking pin 402 is 02 As the cover corner 203 is turned over, it deforms, and the deformation wraps the connection between the cover plate 102 and the paperboard 101, thereby protecting the outer box. After the cover corner 203 uses the locking pin 402 to lock the first locking pin 302, the cover corner 203, the first wrapping corner 201 and the second wrapping corner 202 form a stable pyramid structure. The pyramid structure has the advantage of strong load-bearing capacity, thereby improving the anti-extrusion strength of the combined wrapping corner 2. By placing the cover corner 203 at a right angle close to the second wrapping corner 202, the cover corner 203 can be easily locked. The cover corner 203, the first cover corner 201 and the second cover corner 202 are provided with fasteners 2031 arranged in a gap, and the second cover corner 202 is provided with a fastening groove 2032 that matches the fastener 2031, so that after the locking pin 402 locks the first locking pin 302, the cover corner 203, the first cover corner 201 and the second cover corner 202 form a pyramid structure that abuts against each other, thereby improving the structural strength of the combined cover corner 2. Furthermore, by arranging the fastening groove 2032 of the fastener 2031 to be inclined relative to the upper end surface edge line of the paperboard 101, the product can be taken out of the packaging box. The manually applied force in the direction of opening the cover 102 has a certain angle with the arrangement direction of the fastener 2031, so that when the cover 102 is opened, the fastener 2031 produces structural deformation in the inclined direction, thereby facilitating its disengagement from the buckle groove 2032. Compared with the existing wrap angle, the combined wrap angle 2 can open the cover 102 on the box body 1 without removing it, so that the combined wrap angle 2 improves the structural strength of the outer box angle 103 while improving the convenience of opening the packaging box.

[0041] In order to prevent the cardboard 101 from being squeezed by the machine together with the cardboard 101 when the combined corner 2 is installed at the outer box corner 103 during the extrusion process, and the deformation of the combined corner 2 or the cardboard 101 caused by the extrusion force, causing the structure of the outer box corner 103 to be damaged, the buffer part 5 is provided, and the buffer part 5 is subjected to the extrusion force and then deformed toward the cavity 501, thereby reducing the extrusion force on the combined corner 2 and the cardboard 101. When the packaging box is in a sealed state, that is, the combined corner 2 completely locks and wraps the outer box corner 103, the buffer part 5 can also absorb a part of the impact force from the outside, thereby improving the anti-compression performance of the combined corner 2, thereby ensuring the integrity of the structure of the outer box corner 103. At the same time, all components of the present invention are supported by polyethylene, and polyethylene has good impact resistance and can resist physical impact to a certain extent. Because of its low production cost and easy injection molding, it can adapt to a certain deformation during the deformation of the combined corner 2 and is not easy to break.

[0042] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. An anti-squeeze corrugated paper packaging box, comprising a paperboard (101) and a cover plate (102), wherein the paperboard (101) is provided with a fold (1011), and the paperboard (101) is surrounded by the fold (1011) to form a square frame box body (1) with upper and lower ends open, the upper and lower ends of the fold (1011) are set as outer box corners (103), the paperboard (101) is fixed at the closed position by carton nails, and the cover plate (102) closes or opens the upper and lower ends of the box body (1), characterized in that: The eight outer corners (103) of the box body (1) are respectively glued with a combined corner (2), the combined corner (2) comprising a first corner (201), a second corner (202) and a cover corner (203), the first corner (201) and the second corner (202) being arranged on both sides of the paperboard (101) and mirror-symmetrical along the fold (1011), a locking member (3) being arranged between the first corner (201) and the second corner (202), the locking member ( 3) The first wrap angle (201) and the second wrap angle (202) are connected by hinged connection, a locking member (4) is connected between the first wrap angle (201) and the cover angle (203), and the locking member (4) includes a locking pin (402) installed in the first wrap angle (201), and when the cover plate (102) closes the upper and lower ends of the box body (1), the cover angle (203) causes the locking pin (402) to lock the locking member (3) through the rotation of the cover plate (102).

2. The anti-extrusion corrugated paper packaging box according to claim 1, characterized in that: The locking member (3) comprises a locking groove (301), a first locking pin (302) and a second locking pin (303); the locking groove (301) is provided in the first wrap angle (201) and the second wrap angle (202); one end of the first locking pin (302) and the second locking pin (303) are rotatably connected, and the other end is slidably connected in the locking groove (301); the first locking pin (302) is provided with a plurality of concave cylinders (3021) arranged at intervals outside the locking groove (301) away from the locking groove (301); The second locking pin (303) is provided with a plurality of convex cylinders (3031), the convex cylinders (3031) are arranged in a gap at an end away from the second locking pin (303), the gap width between two concave cylinders (3021) is equal to the height of the convex cylinder (3031), the plurality of convex cylinders (3031) are respectively located between the plurality of concave cylinders (3021), and the upper and lower ends of the convex cylinder (3031) are further provided with a rotating portion (3032), the rotating portion (3032) being convex in shape.

3. The anti-extrusion corrugated paper packaging box according to claim 2, characterized in that: The locking assembly comprises a locking groove (401), a locking pin (402) and a stopping groove (403); the locking groove (401) is arranged in the first wrapping angle (201) and is connected to the locking groove (301); one end of the locking pin (402) is slidably connected in the locking groove (401) and the other end extends out of the locking groove (301); the stopping groove (403) is arranged in the cover angle (203); stopping portions (4031) for fixing the locking pin (402) are arranged on both sides of the inner wall of the stopping groove (403); a guiding surface (4021) is arranged on the locking pin (402); and a guiding groove (3022) matching the guiding surface (4021) is arranged on the first locking pin (302) near the locking groove (301).

4. The anti-extrusion corrugated paper packaging box according to claim 2, characterized in that: The upper and lower ends of the outer side wall of the concave cylinder (3021) are provided with rotation grooves (3023) rotatably connected to the rotation part (3032); the rotation groove (3023) is in an "L" shape and is opened in a direction opposite to the paperboard (101).

5. The anti-extrusion corrugated paper packaging box according to claim 3, characterized in that: The cover corner (203) is provided with fasteners (2031) arranged in a gap at a right angle side close to the second wrap corner (202), and the second wrap corner (202) is provided with a fastening groove (2032) matching the fasteners (2031).

6. The anti-extrusion corrugated paper packaging box according to claim 5, characterized in that: The fastener (2031) and the fastening groove (2032) are arranged obliquely relative to the edge line of the upper end surface of the paperboard (101).

7. The anti-extrusion corrugated paper packaging box according to claim 2, characterized in that: The inner walls on the left and right sides of the locking groove (301) are also connected to hollow semicircular arc-shaped structural protrusions (3011), and the structural protrusions (3011) are respectively in contact with the first locking pin (302) and the second locking pin (303).

8. The anti-extrusion corrugated paper packaging box according to claim 1, characterized in that: The first wrapping corner (201), the second wrapping corner (202) and the cover corner (203) are provided with a buffer portion (5) in a direction away from the paperboard (101) and the cover plate (102), and a cavity (501) is provided in the buffer portion (5). The buffer portion (5) is made of the same material as the combined wrapping corner (2), which is polyethylene.

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