Double snap pack

Abstract

The application provides a double-insert buckle type packaging box which is formed by die cutting and folding an integrated paperboard to form a square box body. The box bottom plate of the box body is connected with a front side plate, a rear side plate, a left side plate and a right side plate around the periphery, respectively; the rear side plate is sequentially connected with a first cover plate and a first insert plate; the front side plate is sequentially connected with a second cover plate and a second insert plate; the first insert plate is provided with a tongue window opening and an insert tongue; the second insert plate is provided with a strip-shaped insert hole matched with the insert tongue; the left and right side plates are respectively connected with inner folding flaps, and the inner folding flaps are provided with side flap grooves for inserting the insert plates when the cover plates are closed. The application is more suitable for the field of medical packaging and can avoid the bonding process in the packaging assembly process and reduce the pollution risk.

Description

Technical Field

[0001] This application relates to the field of packaging product structural design technology, and in particular to a double-locking packaging box. Background Technology

[0002] Pharmaceutical packaging boxes, as an indispensable form of outer packaging in the production, transportation, and sales of pharmaceuticals, are widely constructed using cardboard through die-cutting, creasing, folding, and gluing. This type of packaging not only serves to protect the medicine and identify information, but must also adapt to the high-speed operation requirements of automated cartoning production lines. With the accelerating production pace of pharmaceutical companies and increasingly stringent packaging quality standards, pharmaceutical outer boxes must not only meet appearance specifications but also consider assembly efficiency, structural strength, and environmental safety, placing higher demands on their forming methods.

[0003] Currently, most pharmaceutical packaging boxes widely used in the industry are of the "end-insertion" structure. The manufacturing process typically involves folding die-cut cardboard along the crease line, then internally gluing it along the longitudinal edges of the box to form a stable square box structure. The end is then sealed by the insertion of a lid and a tongue. While this structure is a mature technology suitable for automated cartoning equipment, its reliance on internal gluing complicates the production process. The gluing process usually involves applying glue, pressing, and drying, increasing production time, equipment energy consumption, and manufacturing costs. Furthermore, the use of adhesives generates volatile substances, impacting the cleanliness of pharmaceutical packaging and the workshop environment, which is detrimental to the pharmaceutical industry's requirements for green, environmentally friendly, and clean production. In addition, glue residue reduces the recyclability of the cardboard, contradicting the current trend in the packaging industry towards "glue-free and biodegradable" packaging.

[0004] In summary, existing pharmaceutical packaging boxes generally rely on internal bonding processes during molding. While this structure maintains the box shape, it leads to drawbacks such as complex processes, high energy consumption, and insufficient environmental performance. As the pharmaceutical packaging industry gradually moves towards green manufacturing, intelligent cartoning, and high cleanliness, the limitations of bonding processes in increasing production steps and energy consumption become increasingly prominent, making it difficult to meet the requirements of high-speed automated cartoning and environmentally friendly production. Therefore, there is an urgent need in this field for a pharmaceutical packaging box structure that can achieve rapid cartoning without internal bonding, thereby simplifying the manufacturing process and improving environmental adaptability. Utility Model Content

[0005] This application provides a double-locking packaging box to solve the problem that existing pharmaceutical packaging boxes rely on internal bonding during the molding process, resulting in complex processes and poor environmental performance.

[0006] This application provides a double-locking packaging box, which is formed by die-cutting a single piece of cardboard and folding and assembling it into a square box body. The box body has a bottom plate with a front side panel, a rear side panel, a left side panel, and a right side panel that can be folded relative to it. The rear side panel has a first cover plate that can be folded relative to it on the side away from the bottom plate. The other side of the first cover plate has a first insert plate that can be folded relative to it. The first insert plate has a tongue opening, and a tongue connecting to the side of the first cover plate is provided within the tongue opening. The front side panel has a second cover plate that can be folded relative to it on the side away from the bottom plate. The other side of the second cover plate has a... The second plug-in plate has a folding design, with a strip-shaped insertion hole on its side facing the second cover plate to engage with the plug tongue. The left side plate has a first inward folding wing that can be folded relative to the left side plate on its side away from the bottom plate. The first inward folding wing has a first side wing groove extending along its edge toward the left side plate. The right side plate has a second inward folding wing that can be folded relative to the right side plate on its side away from the bottom plate. The second inward folding wing has a second side wing groove extending along its edge toward the right side plate. The first side wing groove and the second side wing groove allow the first plug-in plate and the second plug-in plate to be inserted and connected together when the first cover plate and the second cover plate are closed.

[0007] In one optional embodiment, the left side panel has a foldable first connecting piece integrally connected to its front and rear sides, and the right side panel has a foldable second connecting piece integrally connected to its front and rear sides.

[0008] In one alternative embodiment, the first connecting piece and the second connecting piece are provided with a joint for interlocking.

[0009] In one optional embodiment, both the first side wing groove and the second side wing groove are Y-shaped grooves.

[0010] In one optional embodiment, the length of the first side wing groove extending along the left side plate is equal to the length of the second side wing groove extending along the right side plate, and the length of the extension is consistent with the width of the first plug-in plate and the width of the second plug-in plate.

[0011] In one optional embodiment, the first plug-in plate is connected to a first follower flap that can be folded relative to the first plug-in plate on the side away from the first cover plate, and the second plug-in plate is connected to a second follower flap that can be folded relative to the second plug-in plate on the side away from the second cover plate; when the first cover plate and the second cover plate are closed, the first follower flap and the second follower flap can be folded to fit against the first plug-in plate and the second plug-in plate respectively to insert and connect the first side wing groove and the second side wing groove.

[0012] In one optional embodiment, the connection between the first follower flap and the first plug-in plate, and the connection between the second follower flap and the second plug-in plate, are respectively provided with creases formed by a semi-permeable die-cutting process.

[0013] Compared with the prior art, this application has the following beneficial effects: 1. This application provides a double-locking packaging box. The packaging box is made of a single piece of cardboard, which is die-cut and folded and assembled. The bottom plate serves as the structural reference and is connected to the front side plate, rear side plate, left side plate, and right side plate to form the basic frame of a square box. The lid includes a first lid and a second lid, which cooperate with each other to form the upper lid structure of the box when closed. The first lid is provided with a first interlocking plate, which interlocks with the strip-shaped interlocking hole on the second interlocking plate of the second lid through the interlocking tongue in the tongue window opening, so that the lid can form a stable locking state after assembly. During assembly, the first and second side wing grooves on the first and second inner folding wing pieces on the left and right sides provide insertion and limiting space for the two plug-in plates. When the two plug-in plates are inserted, their edges can slide into the grooves of the first and second side wing grooves to achieve quick insertion. In addition, with the insertion of the tongue and the strip-shaped insertion hole, a double-locking closure is formed on the box, so that the entire box can be sealed without relying on adhesive and is restrained after the box is closed so that it will not unfold at will.

[0014] 2. During use, the tongue and socket form a stable interlocking relationship, effectively limiting the tendency of the cap to loosen during handling, vibration, or stacking. The side wing grooves on both sides provide containment and guidance for the insertion plate, making the structural stress in the insertion area more balanced. Moreover, this structure achieves cap closure through the folding and insertion action of the cardboard itself, eliminating the need for additional adhesives, simplifying the molding process, and reducing the potential pollution risks from chemical adhesives, thus better meeting the cleanliness requirements of pharmaceutical packaging.

[0015] 3. The fit between the tongue and the hole, as well as between the two insertion plates and the two side wing slots, provides good guidance during assembly, ensuring stable insertion during manual or mechanized box assembly and preventing misalignment or poor engagement. Due to the multi-directional limiting structure of the insertion points, the mating surfaces fit well after the lid is closed, resulting in straighter edges and improved overall box appearance precision and stability. Furthermore, this assembly method is simple to operate, highly repeatable, and well-suited for rapid packaging on automated production lines. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a double-buckle packaging box provided in an embodiment of this application; Figure 2 for Figure 1 The diagram shows the unfolded shape of the double-clasp packaging box. Figure 3 A structural schematic diagram of a double-buckle packaging box is provided for another embodiment of this application; Figure 4 for Figure 3 The diagram shows the unfolded shape of the double-clasp packaging box.

[0018] Explanation of reference numerals in the attached figures: 10-Box body; 100-Box bottom plate; 200-Front side plate; 300-Rear side plate; 400-Left side plate; 410-First inner folding wing; 411-First side wing groove; 420-Left side connecting piece; 500-Right side plate; 510-Second inner folding wing; 511-Second side wing groove; 520-Right side connecting piece; 600-First cover plate; 610-First insertion plate; 611-Tongue opening; 612-Insertion tongue; 613-First follower fold; 700-Second cover plate; 710-Second insertion plate; 711-Strip insertion hole; 712-Second follower fold. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0020] like Figures 1-4 As shown, this application embodiment provides a double-buckle packaging box, which is formed by die-cutting and folding a single piece of cardboard to form a square box body 10. The bottom plate 100 of the box body 10 has a front side plate 200, a rear side plate 300, a left side plate 400, and a right side plate 500 connected to its four sides, respectively. The rear side plate 300 has a first cover plate 600 that can be folded relative to the bottom plate 100 connected to its side. The other side of the first cover plate 600 has a first insert plate 610 that can be folded relative to it. The first insert plate 610 has a tongue opening 611 and a tongue 612 that connects to the side of the first cover plate 600 within the tongue opening 611. The front side plate 200 has a second cover plate 700 that can be folded relative to the bottom plate 100 connected to its side. The other side of the second cover plate 700 has a... A second plug-in plate 710 that can be folded relative to it has a strip-shaped plug hole 711 on the side facing the second cover plate 700 that is engaged with the plug tongue 612; the left side plate 400 has a first inward folding wing 410 that can be folded relative to the left side plate 400 connected to the side away from the bottom plate 100, and the first inward folding wing 410 has a first side wing groove 411 that extends along the edge towards the left side plate 400; the right side plate 500 has a second inward folding wing 510 that can be folded relative to the right side plate 500 connected to the side away from the bottom plate 100, and the second inward folding wing 510 has a second side wing groove 511 that extends along the edge towards the right side plate 500; the first side wing groove 411 and the second side wing groove 511 can be used to allow the first plug-in plate 610 and the second plug-in plate 710 to be inserted and connected together when the first cover plate 600 and the second cover plate 700 are closed.

[0021] In this embodiment, the packaging box is formed by die-cutting and folding a single piece of cardboard. The bottom plate 100 serves as the structural reference and is connected to the front side plate 200, the rear side plate 300, the left side plate 400, and the right side plate 500 to form the basic frame of the square box. The lid includes a first lid plate 600 and a second lid plate 700. When closed, the two cooperate to form the upper lid structure of the box. The first lid plate 600 is provided with a first insertion plate 610. The first insertion plate 610 is inserted into the second insertion plate 710 of the second lid plate 700 through the insertion tongue 612 in the tongue opening 611, so that the lid can form a stable fastening state after assembly. During assembly, the first side wing groove 411 and the second side wing groove 511 on the first inner folding wing 410 and the second inner folding wing 510 on the left and right sides can provide a limiting space for the two plug-in plates to be inserted. When the two plug-in plates are inserted, their edges can slide into the grooves of the first side wing groove 411 and the second side wing groove 511 to achieve quick insertion. This, combined with the insertion of the tongue 612 and the strip-shaped insertion hole 711, forms a double-locking closure of the box body. This allows the entire box body 10 to be sealed and packaged without relying on adhesives, and is restrained after the box body is closed so that it will not unfold at will.

[0022] During use, the tongue 612 and the insertion hole 711 form a stable interlocking relationship, effectively limiting the tendency of the cap to loosen during handling, vibration, or stacking. The side wing grooves on both sides provide containment and guidance for the insertion plate, making the structural stress in the insertion area more balanced. Moreover, this structure achieves cap closure through the folding and insertion action of the cardboard itself, eliminating the need for additional adhesives, simplifying the molding process, and reducing the potential pollution risks from chemical adhesives, thus better meeting the cleanliness requirements of pharmaceutical packaging.

[0023] Furthermore, the fit between the tongue 612 and the insertion hole 711, as well as between the two insertion plates and the two side wing slots, provides good guidance during the assembly process, ensuring stable insertion during manual or mechanized box assembly and preventing misalignment or poor engagement. Due to the multi-directional limiting structure of the insertion points, the mating surfaces fit well after the lid is closed, resulting in relatively straight edges and improved overall box appearance precision and operational stability. Moreover, this assembly method is simple to operate, highly repeatable, and well-suited for rapid packaging on automated production lines.

[0024] In some embodiments, the left side panel 400 has a foldable first connecting piece 420 integrally connected to its front side and rear side, and the right side panel 500 has a foldable second connecting piece 520 integrally connected to its front side and rear side.

[0025] In this embodiment, the front and rear sides of the left side panel 400 and the right side panel 500 extend integrally to form a foldable first connecting piece 420 and a second connecting piece 520, respectively. The first connecting piece 420 and the second connecting piece 520 can be folded during the folding process at their connection points with the corresponding side panels via preset fold lines. During molding, as the left side panel 400 and right side panel 500 fold relative to the bottom panel 100, a first connecting piece 420 and a second connecting piece 520 located on the front side fold and abut against the inner surface of the front side panel 200 folded relative to the bottom panel 100. Meanwhile, the connecting piece 520 on the rear side of the other first connecting piece 420 and the second connecting piece 520 folds and abuts against the inner surface of the rear side panel 300. This creates a double-layered structure on the front and rear sides of the box, enhancing support strength and providing more reliable support for the first cover plate 600 and the second cover plate 700. It also strengthens the four side edges of the box, reducing the risk of corner deformation during assembly. Furthermore, the folding of the first connecting piece 420 and the second connecting piece 520 conceals the folding gaps between the left and right side panels and the front and rear side panels, resulting in a neater overall appearance.

[0026] In some embodiments, the first connecting piece 420 and the second connecting piece 520 are provided with a joint for interlocking.

[0027] In the above embodiments, by providing an interlocking seam for the first connecting piece 420 and the second connecting piece 520, during assembly, the first connecting piece 420 and the second connecting piece 520 can be connected to each other through the interlocking seam after folding. This allows the connected first connecting piece 420 and the second connecting piece 520 to form a relatively stable whole inside the front side panel 200 and the rear side panel 300. The interlocking seam can be formed in one step during the die-cutting process of the cardboard, and its specific form can be a narrow slit opened on the connecting piece. Through this structural design, the first connecting piece 420 and the second connecting piece 520 can be smoothly inserted along the interlocking seam during folding and assembly, forming a mutually interlocking fit. The connection position is relatively fixed and not easy to slip off. The existence of the interlocking seam makes the interlocking depth of the two connecting pieces controllable after assembly, which is convenient for both manual insertion and mechanical folding, improving the consistency and forming stability of mass production. This connection method can achieve a stable fit by utilizing the elasticity and friction of the cardboard itself, without the need for additional adhesive materials, further improving the overall structural strength and environmental performance of the packaging box.

[0028] In some embodiments, both the first side wing groove 411 and the second side wing groove 511 are Y-shaped grooves. This structure has a larger groove opening at the side wing groove position, and the groove opening is V-shaped. During assembly and opening of the box, it can significantly reduce the tearing effect on the groove opening position and avoid damage to the side wing groove. Moreover, the groove opening position can guide the plug-in plate during assembly. When the edge of the plug-in plate contacts the raised groove opening position, the plug-in plate can be more smoothly guided into the groove of the side wing groove, thereby achieving more reliable insertion.

[0029] In some embodiments, the length of the first side wing groove 411 extending toward the left side plate 400 is equal to the length of the second side wing groove 511 extending toward the right side plate 500, and the length of the extension is consistent with the width of the first plug plate 610 and the width of the second plug plate 710.

[0030] When the first insertion plate 610 and the second insertion plate 710 are fully inserted into the first side wing groove 411 and the second side wing groove 511, the insertion depth is naturally limited by the extension length of the side wing grooves towards the left side plate 400 and the right side plate 500, which helps to obtain a consistent assembly endpoint position. In this way, the positioning accuracy of the two insertion plates is high when the cover is closed. Moreover, after multiple opening and closing uses, the insertion parts can still maintain a good fit.

[0031] like Figure 3 and Figure 4 As shown, in some embodiments, the first plug-in plate 610 is connected to a first follower flap 613 that can be folded relative to the first plug-in plate 600 on the side away from the first cover plate 600, and the second plug-in plate 710 is connected to a second follower flap 712 that can be folded relative to the second plug-in plate 710 on the side away from the second cover plate 700. When the first cover plate 600 and the second cover plate 700 are closed, the first follower flap 613 and the second follower flap 712 can be folded and respectively abutted against the first plug-in plate 610 and the second plug-in plate 710 to insert and connect the first side wing groove 411 and the second side wing groove 511.

[0032] In the above embodiment, the two follower flaps can be folded relative to the first insertion plate 610 and the second insertion plate 710 respectively, thereby allowing them to rotate relative to each other during the folding process. After folding, they fit against the corresponding first insertion plate 610 and second insertion plate 710, thus thickening the first insertion plate 610 and second insertion plate 710. When the first cover plate 600 and the second cover plate 700 are fastened together, the first follower flap 613 and the second follower flap 712 can enter the first side wing groove 411 and the second side wing groove 511 together with their respective connected first insertion plate 610 and second insertion plate 710, forming an end composite insertion structure. After insertion, the follower flaps and insertion plates fit together and are embedded in the side wing grooves, with their outer surfaces forming contact support with the groove walls. This structure provides a more stable support state for the insertion part after the cover is closed. Furthermore, since the follower flap can rotate relative to the plug-in plate, after the plug-in is completed, the follower flap will unfold slightly, which can further prevent the plug-in plate from coming loose from the side wing groove.

[0033] In some embodiments, the connection between the first follower flap 613 and the first plug-in plate 610 and the connection between the second follower flap 712 and the second plug-in plate 710 are respectively provided with creases formed by a semi-transparent die-cutting process.

[0034] In the above embodiments, the connection points between the first follower flap 613 and the first insert plate 610, and between the second follower flap 712 and the second insert plate 710, are all formed with creases through a semi-permeable die-cutting process. This process involves shallow cutting a portion of the cardboard, reducing the material thickness without completely cutting the fiber layer, thus providing moderate bending performance during folding. Compared to conventional full creasing or complete cutting, semi-permeable die-cutting provides bendability while maintaining the basic strength of the cardboard, preventing breakage during assembly or repeated opening and closing.

[0035] During assembly, the follow-up flaps fold smoothly along the creases, creating a natural angle transition with the connector plate and resulting in a tighter fit. The creases provide a clear bending path for the folding motion, making the folding action smoother. Because the semi-permeable die-cutting process can be completed in one step during the die-cutting stage without additional processing steps, production efficiency is high, and the consistency of crease positions is good, which helps to improve molding quality and batch assembly accuracy.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A double-locking packaging box, comprising a square box body formed by die-cutting and folding a single piece of cardboard, wherein the bottom plate of the box body is connected to a front side panel, a rear side panel, a left side panel, and a right side panel that can be folded relative to each other, characterized in that, The rear side panel has a first cover plate that can be folded relative to the bottom panel connected to the side away from the bottom panel. A first insertion plate that can be folded relative to the first cover plate is connected to the other side of the first cover plate. The first insertion plate has a tongue opening, and a tongue that connects to the side of the first cover plate is provided within the tongue opening. The front side panel has a second cover plate that can be folded relative to the bottom panel connected to the side away from the bottom panel. A second insertion plate that can be folded relative to the second cover plate is connected to the other side of the second cover plate. The second insertion plate has a tongue that engages with the tongue on its side facing the second cover plate. The device includes a strip-shaped insertion hole; the left side plate is connected to a first inward folding wing that can be folded relative to the left side plate on the side away from the bottom plate of the box, and the first inward folding wing has a first side wing groove extending along the edge towards the left side plate; the right side plate is connected to a second inward folding wing that can be folded relative to the right side plate on the side away from the bottom plate of the box, and the second inward folding wing has a second side wing groove extending along the edge towards the right side plate; the first side wing groove and the second side wing groove allow the first insertion plate and the second insertion plate to be inserted and connected together when the first cover plate and the second cover plate are closed.

2. The double-buckle packaging box according to claim 1, characterized in that, The left side panel has a foldable first connecting piece integrally connected to its front and rear sides, and the right side panel has a foldable second connecting piece integrally connected to its front and rear sides.

3. The double-buckle packaging box according to claim 2, characterized in that, The first connecting piece and the second connecting piece are provided with a joint for insertion.

4. The double-buckle packaging box according to claim 1, characterized in that, Both the first side wing groove and the second side wing groove are Y-shaped grooves.

5. The double-buckle packaging box according to claim 1 or 4, characterized in that, The length of the first side wing groove extending along the left side plate is equal to the length of the second side wing groove extending along the right side plate, and the length of the extension is consistent with the width of the first plug-in plate and the width of the second plug-in plate.

6. The double-buckle packaging box according to any one of claims 1-4, characterized in that, The first plug-in plate is connected to a first follower flap that can be folded relative to the first plug-in plate on the side away from the first cover plate, and the second plug-in plate is connected to a second follower flap that can be folded relative to the second plug-in plate on the side away from the second cover plate. When the first cover plate and the second cover plate are closed, the first follower flap and the second follower flap can be folded to fit against the first plug-in plate and the second plug-in plate respectively to insert and connect the first side wing groove and the second side wing groove.

7. The double-buckle packaging box according to claim 6, characterized in that, The connection points of the first follower flap and the first plug-in plate, and the connection points of the second follower flap and the second plug-in plate, are respectively provided with creases formed by a semi-permeable die-cutting process.

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