Paper strip box and cigarette packaging system

Abstract

The utility model belongs to the technical field of cigarette packaging boxes, and particularly relates to a paper strip box and a cigarette packaging system. The cover and the box body are each of a rectangular box body structure at least provided with a reinforcing structure in a corner area, and each box body component is provided with a closed bottom and a circumferential side wall. An annular boss extending downwards is arranged in the closed end of the cover in the circumferential direction, and an annular stepped retreating table matched with the annular boss is arranged on the outer wall of the open end of the box body in the circumferential direction. When covering is conducted, radial interference fit is formed between the inner side wall of the annular boss and the outer side wall of the annular stepped retreat table, full-circumferential axial plane sealing contact is formed between the bottom end face of the annular boss and the bearing face of the annular stepped retreat table, and the radial interference fit and the axial plane sealing contact jointly form a double-sealing structure. The cover and the box body are integrally formed by paper pulp molding, so that structural gaps and manual splicing errors are avoided, and the production efficiency and the forming precision are greatly improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of cigarette packaging boxes, specifically relating to a paper carton and a cigarette packaging system. Background Technology

[0002] With the evolution of tobacco packaging technology, most mainstream cigarette boxes and cartons on the market today are made of cardboard, formed by slotting and snapping or straight bending, and sealed with heat-shrink transparent film. Some high-end products use hard-shell materials such as metal, injection-molded plastic, and laminated grey cardboard to enhance the packaging's texture and protective performance. While these structural forms perform well in terms of ease of forming and visual appeal, they still have many limitations in terms of sealing, structural strength, environmental friendliness, and processing efficiency, making it difficult to meet the comprehensive needs of tobacco products for moisture protection, aroma preservation, and stable storage and transportation.

[0003] Traditional cardboard boxes achieve three-dimensional shaping through pre-set slots or folds. However, structural gaps are unavoidable at these slots and folds, and even with an external heat-shrink film, these channels cannot be completely sealed. The heat-shrink film itself is composed of folded and spliced ​​film sheets, and the seams also present potential for air permeability. This leads to moisture loss and aroma dissipation after storage and opening, resulting in a significant decline in quality. Furthermore, the folding requirements necessitate a relatively low cardboard thickness, resulting in insufficient overall packaging strength and susceptibility to deformation and collapse during transportation and display, affecting appearance and sales. In addition, the slotting and bending processes for cardboard boxes demand extremely high precision, requiring multiple sets of high-precision molds on the production line. This results in significant equipment investment, complex maintenance, and low overall production efficiency, making it difficult to support large-scale, high-efficiency production.

[0004] While high-end hard-shell packaging offers advantages in strength and durability, the use of plastics, metals, or composite materials results in poor environmental performance, making it difficult to degrade and recycle. It also presents challenges such as high cost and limited functionality. Furthermore, the highly sealed structure can easily trap internal moisture, leading to mold and spoilage of the cigarettes if external humidity and temperature rise.

[0005] In summary, whether it is cardboard boxes or hard-shell packaging, their forming methods rely on the assembly of multiple parts or complex processes. It is difficult to completely eliminate the gaps in the box body, and there is a conflict between processing efficiency and performance. It is still impossible to fundamentally solve the problem of balancing aroma preservation, moisture prevention, environmental protection and efficient production of tobacco products.

[0006] To address the above problems, this utility model is proposed. Utility Model Content

[0007] In existing technologies, whether traditional cardboard boxes or high-end hard-shell packaging, the structure generally relies on the assembly of multiple components or complex processes, making it difficult to completely eliminate box seams, resulting in low processing efficiency and a difficulty in balancing structural performance and manufacturing costs. In actual use, cigarettes are prone to moisture and aroma loss under normal temperature and humidity conditions, while in high humidity environments, the risk of mold growth increases due to water retention issues caused by sealing, further affecting the shelf life of tobacco products and the consumer experience. To solve these technical problems, this utility model provides a novel structure for cigarette boxes and cartons. This structure, while ensuring efficient molding processes, balances sealing, pressure resistance, controllable air permeability, and environmental performance, effectively improving the overall protective effect and adaptability of the packaging. Through structural innovation and material optimization, this packaging solution achieves a synergistic unity of moisture prevention and aroma preservation with plastic reduction and low carbon emissions, providing a more stable, efficient, and environmentally friendly solution for current tobacco packaging.

[0008] The technical solution adopted in this utility model is:

[0009] The first aspect of the present invention provides a paper strip box, including a lid 1 and a box body 2 that fit together.

[0010] Both the lid 1 and the box body 2 are rectangular box structures integrally die-cast from pulp fiber, with a wall thickness of 1.0-1.8mm, and each box component has a closed bottom and circumferential sidewalls.

[0011] The inner wall of the closed end of the lid 1 is provided with a downwardly extending annular protrusion 11, and the outer wall of the open end of the box body 2 is provided with an annular stepped platform 21 that matches the annular protrusion 11.

[0012] When closed, the inner wall of the annular boss 11 and the outer wall of the annular stepped platform 21 form a radial interference fit with an interference amount of 0.1-0.3mm. The bottom end face of the annular boss 11 and the supporting surface of the annular stepped platform 21 form a full circumferential axial plane sealing contact. The radial interference fit and the axial plane sealing contact together constitute a double sealing structure.

[0013] It needs to be explained that the aforementioned reinforcing structure refers to a rib-shaped cavity pre-set in the mold along the outer contour (or at least the corner area) of the sealed carton during the pulp molding process. This cavity allows the wet pulp to automatically fill and tightly fit the cavity during the adsorption / injection stage, forming a prismatic reinforcement structure with certain compressive strength. After demolding and hot pressing, these reinforcing structures are integrally formed with the carton wall, forming a reinforcing structure along the outer contour or the four corners. Specifically, the reinforcing structure refers to a prismatic structure with a thickness greater than the sidewall of the carton on the outer contour or at least in the corner area after sealing, or a higher density and stronger compressive strength prepared through process control.

[0014] Preferably, the lid 1 and the box body 2 are connected on one side by a film hinge or are directly detachable.

[0015] Preferably, the outer front wall of the annular stepped platform 21 is further provided with a protrusion 211, and the inner front wall of the cover 1 is provided with a groove 111 corresponding to the protrusion 211. When the cover 1 and the box body 2 are closed, the protrusion 211 and the groove 111 form an elastic locking structure. A thickness reduction area is provided at the position of the protrusion 211 on the side wall of the box body 2. The depth of the groove 111 and the protrusion height of the protrusion 211 should be such that when the paper box needs to be opened, the edge of the side wall of the box body 2 where the protrusion 211 is located needs to be manually fastened slightly outward to prevent the cover 1 and the box body 2 from being separated without human intervention. The protrusion 211 can be hemispherical, and the corresponding groove 111 can also be hemispherical.

[0016] Preferably, the side wall of the annular stepped platform 21 is also provided with a notch 212, the depth of which is 1 / 3 to 1 / 2 of the platform height. The notch 212 is preferably designed on the side wall of the annular stepped platform 21 in the width direction, and the minimum number is one.

[0017] Preferably, the notch 212 is U-shaped.

[0018] A second aspect of the present invention provides a cigarette packaging system, comprising: a carton as described in any of the first aspects; a plurality of cigarette box units having the same structure as the carton but reduced in size; and a heat-shrink film sealing layer;

[0019] The cigarette box unit contains 20 cigarettes arranged in a matrix, and the carton contains 10 of the cigarette box units in a stacked manner. The outer surface of the carton is covered with a heat-shrinkable film sealing layer.

[0020] The paper box is made of paper pulp fiber integral die casting. Its outer surface is mirror polished by the mold, and the surface roughness is low. It can be directly subjected to high-precision surface decoration processes, including molding, printing, hot stamping, etc., without the need for additional film or coating.

[0021] Meanwhile, due to the good sealing performance of this solution and the fact that the carton itself has microscopic water absorption characteristics, the inner lining sheet and aluminum foil paper are no longer needed in the finished cigarette cartons, greatly reducing packaging costs.

[0022] The beneficial effects of this utility model are:

[0023] 1. The lid and box body of this utility model are integrally molded from pulp, eliminating the need for traditional grooving, bending, gluing, or multi-part assembly. This avoids structural gaps and manual splicing errors, significantly improving production efficiency and molding accuracy. Furthermore, because this solution uses integral pulp molding, eliminating the need for gluing and assembly steps like traditional cardboard boxes, the lid and box body can be manufactured to meet the requirements of daily transportation and storage, possessing a thickness (1.0-1.8mm). Additionally, reinforcing structures are arranged in the corner areas, resulting in excellent compressive strength for the final product.

[0024] 2. This patent uses a ring-shaped boss and a ring-shaped stepped platform to form a high-density contact, blocking moisture and odors. At the same time, the bottom surface of the boss and the supporting surface of the platform are axially fitted around the entire circumference, combined with radial interference, to form a double sealing structure. In addition, this solution has no splicing gaps, which significantly improves the air leakage risk at the folds and heat shrink film splices of traditional paper boxes, and significantly extends the storage period of cigarettes.

[0025] 3. Furthermore, the pulp fibers themselves have microscopic water absorption properties, which can automatically adjust the internal moisture balance according to the ambient humidity. Compared with hard shell materials such as metal, injection-molded plastic or laminated grey cardboard, this solution can not only prevent moisture but also avoid excessive dampness, thus maintaining the flavor and quality of the cigarette.

[0026] 4. The main raw material of this utility model is pulp. The whole is made of biodegradable pulp instead of plastic, metal or composite hard shell, which greatly reduces the carbon footprint of packaging, is easy to recycle and reuse, and is in line with green and sustainable development. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the paper strip box structure of this utility model;

[0028] Figure 2 for Figure 1 A magnified view of part a in the middle;

[0029] Figure 3 for Figure 1 A magnified view of part b in the middle;

[0030] Figure 4 This is a schematic diagram of the cigarette packaging system of this utility model;

[0031] Reference numerals: 1. Lid; 11. Annular boss; 111. Groove; 2. Box body; 21. Annular stepped platform; 211. Protrusion; 212. Notch. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to embodiments, but this is not intended to limit the present invention. Any modifications or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the field or in accordance with the product manual.

[0033] Example 1

[0034] like Figure 1-3 As shown, the first aspect of the present invention provides a paper box, including a lid 1 and a box body 2 that fit together.

[0035] The cover 1 and the box body 2 are rectangular box structures integrally die-cast from pulp fiber with a reinforcing structure in the corner area. The box wall thickness is 1.5mm, and each box component has a closed bottom and circumferential side walls.

[0036] The inner wall of the closed end of the lid 1 is provided with a downwardly extending annular protrusion 11, and the outer wall of the open end of the box body 2 is provided with an annular stepped platform 21 that matches the annular protrusion 11.

[0037] When closed, the inner wall of the annular boss 11 and the outer wall of the annular stepped platform 21 form a radial interference fit, and the bottom end face of the annular boss 11 and the supporting surface of the annular stepped platform 21 form a full circumferential axial plane sealing contact. The radial interference fit and the axial plane sealing contact together constitute a double sealing structure.

[0038] As a preferred embodiment of this utility model, the lid 1 and the box body 2 are connected on one side by a thin film hinge.

[0039] As a preferred embodiment, the lid 1 and the box body 2 are hinged by a film hinge, wherein the film hinge is integrally formed with the box body component.

[0040] The annular stepped platform 21 has a protrusion 211 on its front outer wall, and a groove 111 corresponding to the protrusion 211 is provided on the inner wall of the annular platform 11. When the lid 1 and the box body 2 are closed, the protrusion 211 and the groove 111 form an elastic locking structure. A thickness reduction area is provided at the position of the protrusion 211 on the side wall of the box body 2. The depth of the groove 111 and the protrusion height of the protrusion 211 should be such that when the paper box needs to be opened, the edge of the side wall of the box body 2 where the protrusion 211 is located needs to be manually and slightly outwardly fastened to prevent the lid 1 and the box body 2 from being separated without human intervention.

[0041] In a preferred embodiment, the protrusion 211 is a hemispherical structure, and the corresponding groove 112 is also a hemispherical groove (not shown in the figure). When the cover and the box are closed, the hemispherical protrusion and the hemispherical groove engage tightly. The slight elastic deformation and radial interference force generated by the spherical contact achieve a reliable self-locking effect, preventing unauthorized opening without external force. When opening is required, only a small lateral or axial pressure needs to be applied to the hemispherical protrusion to overcome the elastic resistance of the interference fit and smoothly disengage, thus meeting both the requirements of preventing accidental opening and easy opening.

[0042] On the left and right sides of the annular stepped platform 21, there are U-shaped notches 212 with a depth of 1 / 3 of the platform height, and the width is designed to accommodate one finger. When using: First, when taking out the built-in cigarette box unit for the first time from the carton, you can press and fix the top surface of the cigarette box with one hand, and then insert your fingers into the U-shaped notch 212 with the other hand to support the side of the cigarette box exposed from the notch, and then pull the side upward to easily take out the first cigarette box;

[0043] The same method can also be used to remove the first cigarette from the cigarette box, avoiding damage caused by squeezing too hard due to the narrow gaps between the cigarettes.

[0044] Example 2

[0045] like Figure 4 As shown, this embodiment provides a cigarette packaging system, including: a carton as described in Embodiment 1, 10 cigarette box units with the same structure as the carton but smaller in size, and a heat shrink film sealing layer; the cigarette box units are arranged in rows of 5, and the 10 cigarette box units are stacked in two rows inside the carton, and the heat shrink film sealing layer wraps around the outside of the carton.

[0046] The cigarette box unit contains 20 cigarettes arranged in a matrix, and the carton contains 10 of the cigarette box units in a stacked manner. The outer surface of the entire carton is covered with a heat-shrinkable film sealing layer (not shown in the figure).

[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this application; the dimensions described in the drawings and embodiments are not related to the specific physical object and are not used to limit the protection scope of this application. The physical dimensions can be selected and changed according to actual needs.

Claims

1. A paper strip box, characterized in that, Includes a lid (1) that fits together and a box body (2); The lid (1) and the box (2) are both rectangular box structures, and each box component has a closed bottom and circumferential sidewalls; The inner wall of the closed end of the lid (1) is provided with a downwardly extending annular protrusion (11), and the outer wall of the open end of the box (2) is provided with an annular stepped platform (21) that matches the annular protrusion (11). When closed, the inner wall of the annular boss (11) and the outer wall of the annular stepped platform (21) form a radial interference fit, and the bottom surface of the annular boss (11) and the supporting surface of the annular stepped platform (21) form a full circumferential axial plane sealing contact. The radial interference fit and the axial plane sealing contact together constitute a double sealing structure.

2. A paper strip box according to claim 1, characterized in that, The outer wall of the front side of the annular stepped platform (21) is also provided with a protrusion (211), and the inner wall of the front side of the cover (1) is provided with a groove (111) corresponding to the protrusion (211). When the cover (1) and the box (2) are closed, the protrusion (211) and the groove (111) form an elastic snap-fit ​​structure. The protrusion (211) on the side wall of the box (2) is provided with a thickness reduction area.

3. A paper strip box according to claim 1, characterized in that, Both the lid (1) and the box (2) have a reinforcing structure at least in the corner area.

4. A paper strip box according to claim 1, characterized in that, The side wall of the annular stepped platform (21) is also provided with a notch (212), the depth of which is 1 / 3 to 1 / 2 of the platform height.

5. A paper strip box according to claim 4, characterized in that, The notch (212) is U-shaped.

6. A cigarette packaging system, characterized in that, include: At least one paper strip box as described in any one of claims 1-5; Several cigarette box units with the same structure as the paper strip box but smaller in size; Heat shrink film encapsulation layer; The cigarette box unit contains 20 cigarettes arranged in a matrix, and the paper carton contains 10 of the cigarette box units in a stacked manner. The outer surface of the entire paper carton is covered with a heat-shrinkable film sealing layer.

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