Display box cutting piece and extensible display box assembly

Abstract

The display box cutting piece comprises a left side plate, a front side plate, a right side plate and a rear side plate which are sequentially connected left and right, and the height of the front side plate is smaller than that of the rear side plate; a paper box side pin shaft hole is formed in the left side plate; after the paper box side pin shaft holes are provided with pin shafts, the display box formed by folding the display box cutting pieces can rotate around the pin shafts between the upward opening direction and the forward opening direction. The display box has the advantages that the paper box side pin shaft holes are designed, after the cut pieces are folded into the display box, the cut pieces are used in cooperation with pin shafts, the opening direction of the display box can rotate forwards or upwards, the display box can be stabilized at the two positions, and therefore the display box can adapt to two different use states of the display box. On the basis, the utility model further discloses an extensible display box assembly. The display box assembly has the advantages that the number of the display boxes in the display box assembly can be increased at will through matched use of the display boxes, the connecting pieces and the pin shafts, and therefore the display box assembly is more flexible in use mode.

Description

Technical Field

[0001] The utility model belongs to the field of carton packaging, in particular to a display box cut piece and a display box assembly with a display box folded from the cut piece as a main structure. Background Art

[0002] Display boxes are mainly used to display goods and are widely used in supermarkets. Chinese patent document CN215476314U, on January 11, 2022, disclosed a "multi-layer display box", including a cardboard base, wherein the upper surface of the cardboard base is fixedly connected with supporting cardboards at both ends, a display placement cardboard is fixedly connected between one side of the supporting cardboard, a supporting baffle is fixedly connected between the rear ends of one side of the supporting cardboard, a card slot is passed through the front surface of the supporting baffle, a limited cardboard is fixedly connected to the lower end of the card slot, a folding cardboard is fixedly connected to the upper end of the supporting cardboard, a display cardboard sign is fixedly connected to the other side of the supporting cardboard, and a chimeric cardboard is fixedly connected to the lower end of the cardboard base. The utility model uses paper materials instead of plastic materials for packaging in the display box, so that the display box is easy to recycle and reuse while retaining the function of display packaging, and packaging waste does not produce secondary pollution. The display levels in this type of traditional structure are fixed, and the position must also be fixed to be placed on the counter plane, which lacks sufficient flexibility and cannot adapt well to different display quantity requirements and different placement locations. Summary of the invention

[0003] Based on the above problems, the utility model provides a display box cut piece that can be folded into a single display box. On this basis, a few display boxes can be combined with a few accessories to display any number of display box components, and a hanging display method can be provided, which is no longer limited by the counter position.

[0004] The display box cut pieces of this solution are bilaterally symmetrical structures, so only one part of the symmetrical structure is introduced below.

[0005] In order to achieve the first object of the invention, the utility model adopts the following technical solution: a display box cut piece, including a left side panel, a front side panel, a right side panel and a rear side panel connected in sequence on the left and right sides,

[0006] The height of the front side plate is smaller than the height of the rear side plate;

[0007] The left side plate is provided with a paper box side pin hole; after the paper box side pin hole is equipped with a pin, the display box folded from the display box cut pieces can rotate around the pin in two directions, upward and forward.

[0008] Preferably, the side pin hole of the paper box includes a rear side hole and a front side hole;

[0009] The rear side hole is at the rear, and is a long hole extending in the front-to-back direction;

[0010] The front side hole is at the front, and includes a long hole and an arc-shaped hole; the long hole extends in the front-to-back direction, and is located at the same height as the long hole of the front side hole; the front end of the long hole is the lower end of the arc-shaped hole, and the arc-shaped hole extends upward and backward;

[0011] The distance from the rear end of the rear hole to the rear end of the front hole, the distance from the front end of the rear hole to the front end of the front hole, and the radius of the circle where the arc hole is located are equal;

[0012] The rear end of the arc-shaped hole and the front end of the front side hole are located at the same vertical position.

[0013] Preferably, the long hole of the rear side hole and / or the long hole of the front side hole is dumbbell-shaped.

[0014] Preferably, a concave limiting protrusion is provided at the connecting portion between the arc-shaped hole and the long hole of the front side hole.

[0015] Preferably, a display board is connected above the front side panel.

[0016] Preferably, a front support plate is provided between the front side plate and the display plate, and a rear support plate is connected above the display plate; the height of the front side plate is equal to the sum of the height of the front support plate and the height of the rear support plate.

[0017] Preferably, the display board is provided with a storage structure adapted to the displayed items.

[0018] Preferably, the cut piece is provided with a rope threading hole.

[0019] The beneficial effect of the technical solution is that the pin shaft hole on the side of the paper box is designed. When the cut pieces are folded into a display box, the opening direction of the display box can be rotated between forward and upward with the use of the pin shaft, and can be stabilized in these two positions, thereby adapting to two different usage states of the display box.

[0020] In order to achieve the second object of the invention, the utility model adopts the following technical solution: an expandable display box assembly, comprising a plurality of display boxes folded from the aforementioned display box cut pieces, and also comprising a connecting piece and a pin;

[0021] A pair of connecting member pin holes are provided at both the upper and lower ends of the connecting member, each pair of connecting member pin holes are at the same height, and the spacing between the two connecting member pin holes is equal to the distance from the rear end of the rear side hole to the rear end of the front side hole;

[0022] The pin passes through the pin hole of the connecting piece and the pin hole on the side of the paper box, and fixes the connecting piece and the rotatable pin on the corresponding side wall of the display box together.

[0023] Preferably, a plurality of folding structures are provided in the middle of the connecting piece, and the folds extend in the horizontal direction.

[0024] The beneficial effect of the technical solution is that the number of display boxes in the display box assembly can be expanded arbitrarily through the coordinated use of the display box, the connector and the pin, so the use method is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the cut pieces of the display box of the utility model, wherein the dotted line is the folding line and the solid line is the cutting line;

[0026] Figure 2 This is an enlarged view of the pin hole on the side of the paper box;

[0027] Figure 3 A schematic diagram of a cut piece of a connecting piece;

[0028] Figures 4 to 13 It is a folding step diagram of the cutting piece of the utility model;

[0029] Figures 14 to 16 It is a diagram of three movement positions of the expandable display box assembly of the utility model (left view);

[0030] Fig.17 The utility model is a diagram of the expandable display box assembly of the utility model in a horizontal use state.

[0031] Among them: A left side panel, A1 left lower swing cover, A2 left upper swing cover, left upper side flip cover, A3 left upper side flip cover;

[0032] B front side panel, B1 front lower rocker cover, B2 front lower rocker cover side panel, B3 display panel, B4 front support panel, B5 rear support panel;

[0033] C right side panel, C1 lower right swing cover, C2 upper right swing cover, C3 upper right side flip cover;

[0034] D rear side panel, D1 rear lower rocker cover, D2 rear lower rocker cover side panel,

[0035] E connecting plate,

[0036] F1 is the exposed part of the connecting plate, F2 is the folded part of the connecting plate, F3 is the lower folded part of the connecting plate, and F4 is the lower exposed part of the connecting plate;

[0037] G1 is connected to the exposed part of the liner, G2 is connected to the folded part of the liner, G3 is connected to the lower folded part of the liner, and G4 is connected to the lower exposed part of the liner;

[0038] Z pin;

[0039] 1 carton side pin shaft hole, 11 rear side hole, 111 rear side hole front end, 112 rear side hole rear end, 12 front side hole, 121 front side hole front end, 122 front side hole rear end, 123 arc hole, 124 arc hole rear end,

[0040] 2 storage structures, 3 rope threading holes, 4 connecting piece pin holes. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0042] Example 1

[0043] Example 1 is a display box cut piece, made of corrugated paper, which can also be changed to white cardboard or other relatively rigid cardboard according to design requirements by those skilled in the art. Figure 1 (The image is long, and for ease of viewing, it is arranged vertically) As shown, the display box cut pieces of this example are designed with a left side panel A, a front side panel B, a right side panel C, and a rear side panel D connected from left to right in sequence, and the four can be enclosed end to end, wherein a connecting plate E can be designed on the outside of the rear side panel D or the left side panel A, and the left side panel A and the rear side panel D are fixed together by the connecting plate E. The fixing method can be bonding, nailing, or other fixing methods known to those skilled in the art. The lower side of the left side panel A is connected downwardly with a left lower rocking cover A1, the lower side of the front side panel B is connected downwardly with a front lower rocking cover B1, the lower side of the right side panel C is connected downwardly with a right lower rocking cover C1, and the lower side of the rear side panel D is connected downwardly with a rear lower rocking cover D1. The left lower rocking cover A1, the front lower rocking cover B1, the right lower rocking cover C1, and the rear lower rocking cover D1 constitute the bottom structure of the paper box, which can be detachably fixed or non-detachably fixed by folding and pasting, thereby forming the bottom of the box.

[0044] The height of the front side panel B is lower than that of the rear side panel D; the shape of the left side panel A is divided into two parts, the lower part is a rectangle, and the upper part is a right-angled trapezoid with a larger bottom and a smaller top. The folded display box is a box with a low front and a high back and an opening on the top. The inside of the box is the space for placing the exhibits. Those skilled in the art can independently design a structure such as a shelf for fixing the exhibits according to the design requirements and place it inside the box, or make full use of the cut piece for further development of the design.

[0045] A paper box side pin hole 1 is provided on the left side plate A. Figure 2As shown, the pin hole 1 of the paper box side includes two relatively independent parts: the rear hole 11 and the front hole 12. The rear hole 11 includes only one long hole, the length direction of the long hole is the front-to-back direction, the rear end is the front end 111 of the rear hole, and the front end is the rear end 112 of the rear hole. The front hole 12 includes two parts, the long hole and the arc hole 123: the shape and size of the long hole part are exactly the same as the long hole of the rear hole 11, the rear end is the front end 121 of the front hole, and the front end is the rear end 122 of the front hole; the height positions of the two are also the same, with only a front-to-back position difference; the arc hole 123 extends from the front to the top and back, the front end is connected to the front end of the long hole of the front hole 12, and the rear end is the arc hole rear end 124, and the arc hole rear end 124 and the rear end 112 of the rear hole are located at the same front-to-back position. In between, the distance from the front end 111 of the rear hole to the front end 121 of the front hole is l1, the distance from the rear end 112 of the rear hole to the rear end 122 of the front hole is l2, and the distance from the rear end 124 of the arc hole to the rear end 112 of the rear hole, that is, the radius of the circle where the arc hole 123 is located, is l3, and l1=l2=l3.

[0046] In this embodiment, one pin can slide freely between the front end 111 of the rear hole and the rear end 112 of the rear hole, and the other pin can not only slide freely between the front end 121 of the front hole and the rear end 122 of the front hole, but also enter the arc hole 123 through the rear end 122 of the front hole, and slide freely between the rear end 122 of the front hole and the rear end 124 of the arc hole. If the distance between the two pins is fixed to l1, the relative positions of the two pins remain unchanged, and the folded display box can slide forward and backward, and after sliding to the front end, the display box opening can swing freely between upward and forward.

[0047] Example 2

[0048] Example 2 is another display box cut piece, the material is also corrugated paper. Figure 1 As shown, the bottom structure of the paper box in this example is a commonly used bottom locking structure in the art, so the lower left side of the front lower swing cover B1 is extended and connected with the front lower swing cover side plate B2, the lower left side of the rear lower swing cover D1 is extended and connected with the rear lower swing cover side plate D2, and the shapes of the left lower swing cover A1 and the right lower swing cover C1 are also modified to a trapezoid with a larger top and a smaller bottom. The bottom locking structure of the paper box is a conventional technology in the art and will not be described in detail here.

[0049] Compared with Example 1, this example adds some limiting structures. Figure 2As shown: the long hole of the rear hole 11 is designed to be dumbbell-shaped, that is, the front end 111 of the rear hole and the rear end 112 of the rear hole are slightly larger, and the middle part is slightly concave. This design can make the pin stay more stably at the position of the front end 111 of the rear hole and the rear end 112 of the rear hole, and it is not easy to slip off. Similarly, the long hole of the front hole 12 is also designed to be the same dumbbell shape: it is slightly larger at the front end 121 of the front hole and the rear end 122 of the front hole, and the middle part is slightly concave. Furthermore, at the position where the rear end 122 of the front hole connects to the arc hole 123, an inward-concave limiting structure is added to prevent the pin from sliding into the arc hole 123 at will.

[0050] The design of this embodiment can make the folded display box stay stably at the three positions of rear, front and swinging to open forward to avoid loss of control.

[0051] The rest is the same as in Example 1.

[0052] Example 3

[0053] Example 3 is another display box cut piece. Compared with Example 2, this example optimizes the limiting structure. Figure 2 As shown, in this example, the dumbbell shape of the long hole of the front side hole 12 is only enlarged at the top. This improvement is based on the effect of gravity. Under normal use of the display box, only the enlarged part at the top has an actual limiting effect. Similarly, the long hole of the rear side hole 11 is also optimized, and the concave limiting structure at the position where the rear end 122 of the front side hole connects to the arc hole 123 is also only reflected on the left side.

[0054] The rest is the same as Example 2.

[0055] Example 4

[0056] Example 4 is another display box cut piece. Compared with Example 3, this example adds an auxiliary structure for placing display items in the box. Figure 1 As shown, the upper side of the front side panel B is upwardly connected to the front support panel B4, and the upper side of the front support panel B4 is upwardly connected to the display panel B3. Both the front support panel B4 and the display panel B3 are rectangular or trapezoidal with upper and lower sides parallel to the upper side of the front side panel B, and the size is suitable for the cross-sectional shape inside the display box. Among them, the height of the display panel B3 is equal to the width of the left side panel A, and a storage structure 2 adapted to the exhibits is designed on the display panel B3. In this example, there are three storage holes, which can be used to place 3 cylindrical exhibits, such as instant noodles packaged in barrel-shaped paper boxes. Because the height of the display panel B3 is equal to the width of the left side panel A, the horizontal translation of the left side panel A is limited, so the exhibits will not be displaced at will.

[0057] Furthermore, in this example, a rear support plate B5 can be connected upwardly to the upper side of the display plate B3, and the rear support plate B5 is also a rectangle or trapezoid with upper and lower sides parallel to the upper side of the front side plate B. The height of the front side plate B is h1, the height of the display plate B3 is h2, and the height of the rear support plate B5 is h3. It can be set that h1=h2+h3, and the display plate B3 will be parallel to the bottom of the box after folding. This design allows the left side plate A to be positioned both horizontally and vertically, and the positioning of the exhibits is better.

[0058] If there is a special requirement, it is not necessary to be limited by h1=h2+h3. Then, after folding, the position of the display board B3 is not parallel to the horizontal position or the bottom structure, but is inclined forward or backward.

[0059] The rest is the same as in Example 3.

[0060] Example 5

[0061] Example 5 is another display box cut piece, which can be regarded as the ultimate evolution state of the display box cut piece of this scheme. Figure 1 As shown, a left upper swing cover A2 is connected upwardly at the top of the left side panel A, and a left upper side flap A3 is connected laterally at the upper oblique edge of the left side panel A. The left upper swing cover A2 and the left upper side flap A3 are folded downward and inward respectively after folding, and are tightly fixed to the inner side of the left side panel A. The fixing method can be adhesive or nailing, which mainly prevents the risk of cutting on the upper side of the left side panel A. The oblique edges of the left upper swing cover A2 and the left upper side flap A3 are calculated, and they will not interfere with each other after folding. The oblique protrusion of the left upper side flap A3 also fits the concave of the corresponding side ends of the front support plate B4 and the display plate B3, which is more economical in terms of materials.

[0062] In this example, a rope threading hole 3 is also provided on the left side panel A for threading a rope. In order to ensure the stability of the center of gravity, the rope threading hole 3 is located at the upper part of the left side panel A, generally corresponding to the upper part of the center of gravity of the display box after the display object is loaded. In order to increase the strength of the rope threading hole 3, in this example, the position of the rope threading hole 3 is set at the place where the left upper swing cover A2 is folded inward to form a double-layer structure, so the corresponding hole can also be seen on the left upper swing cover A2 of the cut piece.

[0063] The rest is the same as Example 4.

[0064] The folding steps of the cut pieces of Example 5 are described below:

[0065] Step 1, see Figure 4 As shown, the cut piece is laid flat on a plane with the left side plate A on the left and the connecting plate E on the right;

[0066] Step 2, see Figure 5 As shown, fold the rear side panel D to the left, and glue the connecting panel E to the left side panel A;

[0067] Step 3, see Figure 6 As shown, the left side plate A and the right side plate C are placed vertically with the front side plate B and the rear side plate D to form a rectangular paper tube that runs through from top to bottom;

[0068] Step 4, see Figure 7 As shown, complete the folding of the lock bottom and make the paper box opening upward;

[0069] Step 5, see Figure 8 As shown, bend the left upper rocker cover A2 and the right upper rocker cover C2 inward and downward and fix them respectively;

[0070] Step 6, see Fig. 9 As shown, the upper left flip cover A3 and the upper right flip cover C3 are bent inward and downward and fixed respectively;

[0071] Step 7, see Fig.10 As shown, the display board B3 is bent outwards so that the display board B3 and the front support board B4 are perpendicular; the rear support board B5 is bent inwards so that the rear support board B5 and the display board B3 are perpendicular;

[0072] Step 8, see Fig.11 As shown, the display plate B3 is bent inward and downward, so that the front support plate B4 is close to the inner wall of the front side plate B, the display plate B3 is parallel to the bottom of the box, the rear support plate B5 is close to the inner wall of the rear side plate D, and the end of the rear support plate B5 is against the bottom of the box;

[0073] The steps of folding the cut pieces into individual display boxes are completed.

[0074] Example 6

[0075] Embodiment 6 is an expandable display box assembly, which is composed of a suitable number of display boxes, connectors and a pin Z. The display box is the folded display box in Embodiment 5. The connector can also be made of corrugated paper or white cardboard and folded. The pin Z is a conventional pin, one end of the shaft is a protrusion, and the other end is provided with an anti-escape structure with a slightly enlarged diameter, or a detachable limiter is additionally installed at the other end to form a structure similar to a snap-on buckle.

[0076] See also Figure 3As shown, the connector of this example is a long strip with transition arcs at the upper and lower ends. A pair of connector pin holes 4 are respectively provided above and below the connector. The two holes of each pair of connector pin holes 4 are equal in height, and the spacing l4 and l1 between the two holes are equal. The connector is designed with multiple crease lines in the middle to form several folding structures. In this example, there are 3 crease lines, forming two folding structures, and all crease lines extend in the left and right directions. Since there are only 2 folding structures in this example, the heights of the two folding structures are equal. Through the above design, the long strip connector is divided into four parts from top to bottom: the exposed part F1 on the connecting plate, the folded part F2 on the connecting plate, the folded part F3 under the connecting plate, and the exposed part F4 under the connecting plate, wherein the connector pin shaft hole 4 is respectively arranged on the exposed part F1 on the connecting plate and the exposed part F4 under the connecting plate, and the folded part F2 on the connecting plate and the folded part F3 under the connecting plate can be folded inward when needed, so that the connector only exposes the exposed part F1 on the connecting plate and the exposed part F4 under the connecting plate.

[0077] The following describes how to assemble and use the expandable display box component in this example:

[0078] See also Fig.12 As shown, prepare 3 display boxes, 4 connecting pieces and 12 pins Z;

[0079] See also Fig.13 As shown, two pins Z are used to pin the connector pin hole 4 above one connector to the rear hole 11 and the front hole 12 of the top display box respectively; two pins Z are used to pin the connector pin hole 4 below the connector, the connector pin hole 4 above another connector, and the rear hole 11 and the front hole 12 of the middle display box respectively; two pins Z are used to pin the connector pin hole 4 below the connector to the rear hole 11 and the front hole 12 of the bottom display box respectively; the other side is connected in the same way; the state after the connection is completed is as shown in FIG. Fig.13 As shown;

[0080] At this time, the left view of the expandable display box component participates Fig.14 As shown, and refer to Figure 2 As shown, the position of the rear pin Z is at the front end 111 of the rear hole, and the position of the front pin Z is at the front end 121 of the front hole. The display box is in the front position, with the opening facing upward, and the connecting piece is in the extended state. At this time, by threading a rope through the rope threading hole 3, the entire expandable display box assembly can be hung for use without occupying the flat surface of the counter.

[0081] When deformation is required, the display box is pulled backwards so that the rear pin Z is located at the rear end 112 of the rear hole and the front pin Z is located at the rear end 122 of the front hole. The display box is in the rear position with the opening still facing upwards. Fig.15 As shown;

[0082] Manual operation helps the front pin Z to enter the arc hole 123, so that the display box can be rotated along the arc hole 123. When it rotates to the end, that is, the rear end 124 of the arc hole, the display box opens forward; the overall structure is turned from vertical to horizontal, and the state at this time is as follows Fig.16 As shown; at this state, it can be placed flat on the counter for display;

[0083] Finally, the connecting piece is folded to expose only the upper exposed portion F1 of the connecting plate and the lower exposed portion F4 of the connecting plate, so that the volume of the expandable display box assembly of this example is reduced to a storage state, that is, Fig.17 shown.

[0084] If necessary, you can Fig.12 The number of display boxes can be increased infinitely downwards on this basis.

[0085] Example 7

[0086] Example 7 is another expandable display box assembly. Compared with Example 6, the main improvement of the expandable display box assembly of this example is that the connecting piece is strengthened. Figure 3 As shown, the connector piece of this example takes the right side of the piece of Example 6 as the axis of symmetry, and adds a connecting lining plate that is completely symmetrical with the left side. The openings, crease lines, etc. are completely symmetrical. From top to bottom, it is also divided into the exposed part G1 on the connecting lining plate, the folded part G2 on the connecting lining plate, the folded part G3 under the connecting lining plate, and the exposed part G4 under the connecting lining plate. When folding, first fold the connecting lining plate backwards until the front and back pieces are tightly attached, which can be glued or not, and then installed and used as in Example 6. This solution can significantly improve the load-bearing effect of the connector. This layered structure can be set up with multiple layers as needed.

[0087] There can be more crease lines on the connector and more folding structures, but as a skilled technician, you need to comprehensively consider whether it will affect the flatness after folding, and thus affect the storage space.

Claims

1. A display box cut piece, characterized in that: The height of the front side plate (B) is smaller than the height of the rear side plate (D); The left side plate (A) is provided with a paper box side pin hole (1); after the paper box side pin hole (1) is provided with a pin, the display box formed by folding the display box cut pieces can be rotated around the pin in two directions, opening upward and forward.

2. A display box cut piece according to claim 1, characterized in that: The paper box side pin shaft hole (1) comprises a rear side hole (11) and a front side hole (12); The rear side hole (11) is located at the rear and is a long hole extending in the front-to-back direction; The front side hole (12) is located at the front and includes a long hole and an arc-shaped hole (123); the long hole extends in the front-to-back direction and is located at the same height as the long hole of the front side hole; the front end of the long hole is the lower end of the arc-shaped hole (123), and the arc-shaped hole (123) extends upward and backward; The distance from the rear end of the rear hole (11) to the rear end of the front hole (12), the distance from the front end of the rear hole (11) to the front end of the front hole (12), and the radius of the circle where the arc hole (123) is located are equal; The rear end of the arc-shaped hole (123) and the front end of the front side hole (12) are located at the same vertical position.

3. A display box cut piece according to claim 2, characterized in that: The long hole of the rear side hole (11) and / or the long hole of the front side hole (12) are dumbbell-shaped.

4. A display box cut piece according to claim 2 or 3, characterized in that: A concave limiting protrusion is provided at a connecting portion between the arc-shaped hole (123) and the long hole of the front side hole (12).

5. A display box cut piece according to claim 1, 2 or 3, characterized in that: A display board (B3) is connected to the upper side of the front side board (B).

6. A display box cut piece according to claim 5, characterized in that: A front support plate (B4) is provided between the front side plate (B) and the display plate (B3), and a rear support plate (B5) is connected above the display plate (B3); the height of the front side plate (B) is equal to the sum of the height of the front support plate (B4) and the height of the rear support plate (B5).

7. A display box cut piece according to claim 5, characterized in that: The display board (B3) is provided with a storage structure (2) adapted for the display items.

8. A display box cut piece according to claim 1, 2 or 3, characterized in that: The cut piece is provided with a rope threading hole (3).

9. An expandable display box assembly, comprising a plurality of display boxes folded from the display box cut pieces of claim 1, characterized in that: Also includes connectors and pins (Z); A pair of connecting member pin holes (4) are provided at both the upper and lower ends of the connecting member, each pair of connecting member pin holes (4) are at the same height, and the spacing between the two connecting member pin holes (4) is equal to the distance from the rear end of the rear side hole (11) to the rear end of the front side hole (12); The pin (Z) passes through the pin hole (4) of the connecting piece and the pin hole (1) on the side of the paper box, and fixes the connecting piece to the rotatable pin on the corresponding side wall of the display box.

10. An expandable display box assembly according to claim 9, characterized in that: A plurality of folding structures are arranged in the middle of the connecting piece, and the folds extend in the horizontal direction.

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