A variable volume packaging box

Abstract

The utility model provides a kind of variable volume packing box, including two oppositely arranged first side plates, and first side plate is connected with first upper cover plate and first lower cover plate;And two oppositely arranged second side plates, and second side plate is connected with second upper cover plate and second lower cover plate;First side plate and second side plate are surrounded and form the horizontal circumferential wall of variable packing box;Second side plate is equipped with folding part, and folding part is equipped with several pre-folding lines, and the pre-folding line of different second side plate is symmetrically arranged;Second upper cover plate is equipped with first cutting part, and second lower cover plate is equipped with second cutting part, and folding part, first cutting part and second cutting part are adjacent.The utility model provides a kind of variable volume packing box, by being provided with pre-folding line, first cutting part and second cutting part, the reduction of volume can be realized without damaging packing box edge and frame, to have the characteristics of structural stability and variable volume more.

Description

Technical Field

[0001] This utility model belongs to the technical field of packaging boxes, specifically relating to a packaging box with variable volume. Background Technology

[0002] In non-bulk packaging operations, or when using packaging materials for inventory items with inconsistent sizes, it is common to encounter situations where the size of the packaging box does not perfectly match the items being packaged. This problem mainly leads to two types of waste: first, the packaging box is too large, requiring a large amount of filling material, resulting in wasted packaging resources and over-packaging; second, when the packaging quantity changes, for example, if a packaging box originally intended to package two products becomes unusable due to a change in demand to one, new sizes must be purchased, leading to the original packaging boxes becoming idle and wasted.

[0003] There are generally two situations where the packaging box size is not suitable: one is that the length and width of the packaging box are appropriate, but the height of the packaging box is too tall. Usually, the height of the packaging box is reduced to the height of the packaged item by cutting the four edges of the packaging box.

[0004] Another scenario is that the box height is appropriate, but the length (or width) is too large. In this case, the only solution is usually to cut off the vertical edges of the box and bend the sidewalls in the left and right directions to adjust the length or width. However, this situation is more complex. After bending the sidewalls, adjacent edges may adhere to the contents, damaging the original frame structure of the box and reducing its overall load-bearing capacity. Furthermore, the fit of the sidewalls is difficult to control precisely. Either excessive bending leads to overlapping sidewalls, creating localized bulges that affect subsequent sealing; or insufficient bending creates gaps, resulting in irregular gaps after sealing, exposing the contents or causing inadequate sealing and increasing the risk of damage during transport. Additionally, sealing becomes more difficult and may require further cutting.

[0005] Therefore, it is evident that adjusting the length or width of a packaging box presents significant challenges. Consequently, providing a structurally stable packaging box with adjustable volume under such conditions is a pressing issue for those skilled in the art. Summary of the Invention

[0006] To address the shortcomings of the existing technology, this utility model provides a variable volume packaging box. By incorporating a pre-folding line, a first cutting section, and a second cutting section, it is possible to reduce the volume of the packaging box without damaging its edges and frame, thus combining structural stability with variable volume.

[0007] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a packaging box with variable volume, including Two opposing first side plates, each connected to a first upper cover plate and a first lower cover plate; and Two opposing second side plates, the second side plates being connected to a second upper cover plate and a second lower cover plate; The first side plate and the second side plate surround and form the horizontal circumferential sidewall of the variable packaging box; The second side plate is provided with a folding part, and the folding part is provided with a plurality of pre-folding lines, which are symmetrically arranged on different second side plates; The second upper cover plate is provided with a first cutting portion, and the second lower cover plate is provided with a second cutting portion. The folding portion, the first cutting portion and the second cutting portion are adjacent to each other.

[0008] In some implementations, the first cutting section and the second cutting section are provided with a plurality of pre-cutting lines.

[0009] In some implementations, the pre-folding line and the pre-cutting line used to form the variable-volume packaging box of the same size form a folding line group; Within the same set of folding lines, the distance from the first side plate adjacent to the folded portion to the pre-folding line is half the distance from the first side plate to the pre-cutting line.

[0010] In some implementations, the folded portion, the first cut portion, and the second cut portion have the same length along the extension direction of the second side plate.

[0011] In some implementations, the pre-fold line is located on the centerline of the folded portion and parallel to the first side plate; The pre-cut lines are located on the center lines of the second upper cover plate and the second lower cover plate, respectively, and the pre-cut lines are parallel to the first side plate.

[0012] In some implementations, the variable-volume packaging box is provided with a structural reinforcement, and after the second side plate is bent along the pre-fold line, the overlapping part of the second side plate is connected through the structural reinforcement.

[0013] In some implementations, the structural reinforcement includes at least a first adhesive member disposed at the left and right ends of the pre-fold line, and the first adhesive member is located outside the second side plate. After the folded portion is bent along the pre-fold line, the first adhesive member is connected to it.

[0014] In some implementations, the inner side of the first side plate is provided with a second adhesive member, and the inner side of the second side plate is provided with a third adhesive member. After the folded portion is bent along the pre-fold line, the second adhesive member and the third adhesive member are connected.

[0015] In some implementations, the structural reinforcement includes a snap-fit ​​fold line formed on the first side plate and a slot preform line formed on the fold. The buckle is formed on the first side plate by bending along the buckle forming fold line; a slot is formed on the folded part by hollowing out along the slot preforming line. After the folded portion is bent along the pre-fold line, the buckle is inserted into the slot.

[0016] In some implementations, the pre-fold line is located on the fold portion outside the second side plate.

[0017] In summary, this utility model has at least the following advantages: This utility model provides a variable-volume packaging box. By incorporating a pre-folding line, a first cutting section, and a second cutting section, it achieves volume reduction without damaging the edges and frame of the packaging box, thus combining structural stability with variable volume. Specifically, the second side panel is bent through the pre-folding line in the folding section, without cutting or damaging the edges of the packaging box, and the length of the second side panel is reduced, ensuring the original structural strength of the carton. The first and second cutting sections connected to the upper and lower sides of the second side panel, respectively, can be cut as needed. After modification, the closing position of the upper and lower flaps is regular, without intersecting gaps, effectively preventing the packaged goods from being exposed. The first side panel is retained without changing its structural dimensions. When dealing with a two-to-one packaging issue, this structure is more conducive to fitting the product to be packaged. The overall modification method is simple and quick, improving the utilization rate of the carton, consuming excess inventory, and saving costs. Attached Figure Description

[0018] Figure 1 This is a structural schematic diagram of the variable volume packaging box provided in Embodiment 1 of this utility model; Figure 2 A folding diagram of a variable-volume packaging box provided in Embodiment 1 of this utility model; Figure 3 A schematic diagram of the completed folding of the variable volume packaging box provided in Embodiment 1 of this utility model; Figure 4 This is a structural schematic diagram of a variable-volume packaging box provided in Embodiment 2 of this utility model; Figure 5 This is a structural schematic diagram of the variable volume packaging box provided in Embodiment 3 of this utility model; Marked in the image: 100. First side plate; 110. First upper cover plate; 120. First lower cover plate; 200. Second side panel; 201. Pre-fold line; 202. Folding part; 210. Second upper cover plate; 220. Second lower cover plate; 211. First cutting part; 221. Second cutting part; 230. Pre-cutting line; 310. First adhesive component; 320. Third adhesive component; 410. Buckle forming fold line; 420. Slot preforming line; 500, Overlapping area. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0023] For ease of understanding, it should be noted that the X-axis in the graph represents the horizontal direction, the Y-axis represents the vertical direction, and the Z-axis represents the vertical direction.

[0024] Example 1: Please see Figures 1-3This embodiment provides a variable volume packaging box that can reduce its volume without damaging the edges and frame of the packaging box, thus combining structural stability and variable volume.

[0025] Specifically, the variable-volume packaging box includes two opposing first side panels 100 and two opposing second side panels 200, which together form the horizontal circumferential sidewalls of the variable-volume packaging box. The first side panel 100 is connected to a first upper cover plate 110 and a first lower cover plate 120, and the second side panel 200 is connected to a second upper cover plate 210 and a second lower cover plate 220. Normally, the first upper cover plate 110, the first lower cover plate 120, the second upper cover plate 210, and the second lower cover plate 220 are used to seal the top and bottom surfaces of the variable-volume packaging box.

[0026] In this embodiment, the length of the second side plate 200 is greater than that of the first side plate 100, and the length of the second side plate 200 needs to be reduced in this embodiment.

[0027] In some embodiments, the second side plate 200 is provided with a folding portion 202, and the folding portion 202 is provided with a plurality of pre-folding lines 201, and the pre-folding lines 201 of different second side plates 200 are symmetrically arranged. The second upper cover plate 210 is provided with a first cutting portion 211, and the second lower cover plate 220 is provided with a second cutting portion 221, and the folding portion 202, the first cutting portion 211 and the second cutting portion 221 are adjacent to each other.

[0028] In use, the different second side panels 200 bend inward along the pre-fold line 201 into the interior of the variable-volume packaging box, and the folding portion 202 of the second side panel 200 folds, thereby reducing the length of the second side panel 200 to achieve the target length. At the same time, the first cutting portion 211 and the second cutting portion 221 can be cut as needed so that the cut second upper cover 210 and the second lower cover 220 fit snugly with the product to be packaged, avoiding any obstruction to the folding of the folding portion 202.

[0029] Specifically, for ease of cutting, the first cutting section 211 and the second cutting section 221 may also be provided with a plurality of pre-cutting lines 230. It should be noted that the pre-cutting lines 230 may be a dot-cutting line structure, a V-groove cutting line structure, or a semi-through-cutting line structure for cutting the side panel but not penetrating the box body, etc. The pre-folding line 201 is preferably an indentation line.

[0030] In some embodiments, the pre-folded line 201 may also be a dotted line structure, a V-groove tangent structure, or a semi-through tangent structure.

[0031] Furthermore, under normal circumstances, a suitable pre-folding line 201 will be selected as the center of symmetry to bend the second side plate 200, and the overlapping part will form an overlapping area 500.

[0032] The pre-folding line 201 and the pre-cutting line 230 used to form a folding line group for creating a variable-volume packaging box of the same size. Preferably, within the same folding line group, the distance from the first side plate 100 adjacent to the folded portion 202 to the pre-folding line 201 is half the distance from the first side plate 100 to the pre-cutting line 230. At this time, the second side plate 200 is symmetrically folded to form an overlapping area 500, and the portions of the second upper cover plate 210 and the second lower cover plate 220 located above and below the overlapping area 500 are removed, leaving only the portions of the second upper cover plate 210 and the second lower cover plate 220 connected to the overlapping area 500, thus simplifying the structure of the variable-volume packaging box and making it more suitable for the packaged items.

[0033] In this case, in order to ensure the existence of a pre-cutting line 230 that matches the pre-folding line 201, the folding portion 202, the first cutting portion 211 and the second cutting portion 221 have the same length in the direction of extension along the second side plate 200.

[0034] In this embodiment, the second side plate 200 is divided into two along its centerline parallel to the first side plate 100, one part of which is a folding portion 202; the second upper cover plate 210 is divided into two along its centerline parallel to the first side plate 100, the part connected to the folding portion 202 is a first cutting portion 211; the second lower cover plate 220 is divided into two along its centerline parallel to the first side plate 100, the part connected to the folding portion 202 is a second cutting portion 221; There is one pre-folding line 201, which is located on the center line of the folded portion 202 and parallel to the first side plate 100. Pre-cutting lines 230 are located on the center lines of the first upper cover plate 110 and the first lower cover plate 120, respectively, and are parallel to the first side plate 100. At this time, the overlapping area 500 formed by folding along the pre-folding line 201 completely coincides with the area of ​​the folded portion 202.

[0035] Furthermore, since the second side plate 200 needs to be folded inward along the pre-fold line 201 when changing the volume, the pre-fold line 201 is preferably provided on the folded portion 202 on the outer side of the second side plate 200 to facilitate folding.

[0036] Example 2: This embodiment further optimizes the structure based on Embodiment 1. Please refer to Embodiment 1 for similarities. The improvements are further explained below. Figures 1-3 Based on the above, refer to Figure 4 .

[0037] After the second side panel 200 is folded, the volume of the variable-volume packaging box is reduced. However, the folded part is elastic, which brings some operational difficulties to the subsequent sealing process. In order to facilitate the sealing of the variable-volume packaging box, a structural reinforcement is provided on the box. After the second side panel 200 is bent along the pre-fold line 201, the overlapping area 500 of the second side panel 200 is connected by the structural reinforcement, avoiding the need for manual fixation of the overlapping area 500 while sealing the box, thus helping to improve sealing efficiency.

[0038] In this embodiment, the structural reinforcement includes at least two first adhesive members 310 disposed at the left and right ends of the folded portion 202, with the first adhesive members 310 located on the outside of the folded portion 202. After the second side plate 200 is bent along the pre-fold line 201, it can be connected via the first adhesive members 310. It should be noted that the structural reinforcement may include two first adhesive members 310 disposed at the left and right ends of the folded portion 202, or it may include a first adhesive member 310 extending from the left end to the right end. In one example, the first adhesive member 310 extends from the left end to the right end. Normally, the surface of the first adhesive member 310 is provided with a protective layer. After the overlapping area 500 is defined, the protective layer on the surface of the first adhesive member 310 is symmetrically removed according to the range of the overlapping area 500, so that the overlapping area 500 can be fixedly connected by the first adhesive member 310. The first adhesive element 310, extending from the left end to the right end, is versatile and can meet the needs of different pre-cut lines 230 and pre-folded lines 201. This first adhesive element 310 can be adhesive tape or a Velcro or other adhesive structure.

[0039] The first adhesive element 310 partially connects the overlapping area 500, but the folded first side panel 100 tends to move away from the overlapping area 500. Furthermore, a second adhesive element is provided on the inner side of the first side panel 100, and a third adhesive element 320 is provided on the inner side of the folded portion 202 of the second side panel 200. After the folded portion 202 is bent along the pre-fold line 201, the second adhesive element and the third adhesive element 320 are connected, thereby fully fixing the first side panel 100 to the overlapping area 500. The second and third adhesive elements 320 are similar to the first adhesive element 310, and their surfaces are covered with a protective layer in the normal state. When adhesion is required, the first adhesive element 310 must be removed beforehand.

[0040] Example 3: This embodiment further optimizes the structure based on Embodiment 1. Please refer to Embodiment 1 for similarities. The improvements are further explained below. Figures 1-3 Based on the above, refer to Figure 5 .

[0041] In this embodiment, the structural reinforcement includes a snap-fit ​​forming fold line 410 formed on the first side plate 100 and a slot preformed line 420 formed on the folded portion 202; a snap is formed on the first side plate 100 by bending along the snap-fit ​​forming fold line 410; a slot is formed on the folded portion 202 by hollowing out along the slot preformed line 420.

[0042] Specifically, the snap-fit ​​forming fold line 410 and the slot pre-forming line 420 can be a point-break structure to facilitate manual force application. After the second side plate 200 is initially folded along the pre-fold line 201, the snap-fit ​​is inserted into the slot and its end is further bent so that the end of the snap-fit ​​abuts against the overlapping area 500 on the inside of the variable volume packaging box, thereby achieving the initial positioning of the first side plate 100 and the overlapping area 500, which facilitates the subsequent sealing of the variable volume packaging box.

[0043] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. A variable-volume packaging box, characterized in that, include: Two opposing first side plates (100) are connected to a first upper cover plate (110) and a first lower cover plate (120); Two opposing second side plates (200), the second side plates (200) being connected to a second upper cover plate (210) and a second lower cover plate (220); The first side panel (100) and the second side panel (200) surround and form the horizontal circumferential sidewall of the variable packaging box; The second side plate (200) is provided with a folding part (202), and the folding part (202) is provided with a plurality of pre-folding lines (201), which are symmetrically arranged on different second side plates (200); The second upper cover plate (210) is provided with a first cutting portion (211), and the second lower cover plate (220) is provided with a second cutting portion (221). The folding portion (202), the first cutting portion (211) and the second cutting portion (221) are adjacent to each other.

2. The variable volume packaging box according to claim 1, characterized in that, The first cutting section (211) and the second cutting section (221) are provided with a plurality of pre-cutting lines (230).

3. The variable volume packaging box according to claim 2, characterized in that, The pre-folding line (201) and the pre-cutting line (230) used to form the variable volume packaging box of the same size form a folding line group; Within the same set of folding lines, the distance from the first side plate (100) adjacent to the folded portion (202) to the pre-folding line (201) is half the distance from the first side plate (100) to the pre-cutting line (230).

4. The variable volume packaging box according to claim 3, characterized in that, The folded portion (202), the first cut portion (211), and the second cut portion (221) have the same length along the extension direction of the second side plate (200).

5. The variable volume packaging box according to claim 4, characterized in that, The pre-fold line (201) is located on the center line of the folded part (202) and parallel to the first side plate (100); The pre-cut line (230) is located on the center line of the second upper cover plate (210) and the second lower cover plate (220), respectively, and the pre-cut line (230) is parallel to the first side plate (100).

6. The variable volume packaging box according to claim 1, characterized in that, The variable volume packaging box is provided with a structural reinforcement. After the second side plate (200) is bent along the pre-fold line (201), the overlapping part of the second side plate (200) is connected through the structural reinforcement.

7. The variable volume packaging box according to claim 6, characterized in that, The structural reinforcement includes at least a first adhesive member (310) disposed at the left and right ends of the folded portion (202), and the first adhesive member (310) is located outside the second side plate (200); After the folded portion (202) is bent along the pre-fold line (201), it is connected to the first adhesive piece (310).

8. The variable volume packaging box according to claim 7, characterized in that, The first side plate (100) has a second adhesive on its inner side, and the second side plate (200) has a third adhesive (320) on its inner side of the folded part (202). After the folded part (202) is bent along the pre-fold line (201), the second adhesive and the third adhesive (320) are connected.

9. The variable volume packaging box according to claim 6, characterized in that, The structural reinforcement includes a snap-fit ​​fold line (410) formed on the first side plate (100) and a slot preform line (420) formed on the fold (202); The buckle is formed on the first side plate (100) by bending along the buckle forming fold line (410); Hollow out along the slot preform line (420) to form a slot on the fold (202); After the folded part (202) is bent along the pre-fold line (201), the buckle is inserted into the slot.

10. The variable volume packaging box according to any one of claims 1-9, characterized in that, The pre-fold line (201) is provided on the fold portion (202) on the outside of the second side plate (200).

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