CN208102583U - A kind of packaging box with drawing and tearing device - Google Patents

Abstract

The utility model discloses a packaging box with a drawing and tearing device, which is a continuous drawing and tearing strip pasted on three side plates or four side plates of the packaging box through an adhesive layer; the side plate where the end of the pulling and tearing strip is located is provided with an easy-to-tear line, and the easy-to-tear line is arranged on the upper side and the lower side of the pulling and tearing strip. Although the requirement of packing and transporting of goods can be satisfied to current packing box, do not have the function of opening fast, when the goods is difficult to take out, need destroy the packing box, improved the degree of difficulty that the packing box was opened to the consumer, and general packing box just is difficult to the lid back after opening the case because of receiving serious destruction when opening, causes if can't obtain good dustproof effect when still remaining article in the packing box. The utility model discloses a draw and pull out tearing device, make the packing box have the function of opening fast, when the incasement goods is difficult to take out, the consumer can draw out to tear the strip and carry out the small scale to the packing box and destroy through pulling, reaches the effect of opening fast.

Description

A kind of packaging box with drawing and tearing device

technical field

The utility model relates to a packing box, in particular to a packing box with a drawing and tearing device.

Background technique

With the development of online shopping technology, e-commerce is developing rapidly; e-commerce practitioners must properly pack their goods in packing boxes before delivering them to freight operators. When packing, they often use packing boxes, boxes, bags and other packaging structures ( hereinafter collectively referred to as packing boxes), and then cover the cover of the packing box and then stick it with packaging tape to seal it, and the same is true for other postal services.

Almost 90% of general packaging boxes are formed by paper boards into predetermined outline shapes and folding lines, and then bent along the folding lines to form a three-dimensional packaging box with four side walls around it. Two flaps on the opposite sides are reserved at the top and bottom of the box respectively; after closing the two flaps at the bottom, paste packaging tape on the seam between the two flaps to fix it into the bottom of the packing box; the top flap at the The two wing panels on the opposite sides are in the open state for putting in items and then close together, and then the sealing tape is pasted on the seam between the two wing panels to complete the packaging of the packing box.

When transporting glass containers, ceramic containers or other fragile items in packaging boxes, a layer of anti-collision protection plates (such as foam boxes, etc.) Positioned between the inner panels of each anti-collision protection panel, ensure that the anti-collision protection panels on each side are closely attached to the inner panels of the vertical side walls around the packaging box to prevent items from moving or shaking, and then place another anti-collision protection panel on top Protect the board, and finally close the box and apply the sealing tape to complete the package.

Although the above-mentioned general packing box packaging method provides good protection for fragile items, when the goods are delivered to the hands of consumers, it increases the difficulty for consumers to open the packing box, causing consumers to complain repeatedly. The reason is that when opening the packing box, the sealing tape sticking to the packing box is usually cut with a blade and then the flaps are opened. At this time, the fragile items are firmly positioned between the anti-collision protection plates of each side plate, and The close contact between each anti-collision protection board and the inner surface of each vertical side wall of the packaging box produces a certain degree of vacuum effect, which makes it impossible to take out the anti-collision protection board and the goods smoothly, and consumers often have to destroy the packaging box or try to remove it. Disassemble the packing box to take out the items; it is easy to cause damage to fragile items in the process of taking out.

In addition, the general packaging box is severely damaged when opened, and it is not easy to cover it back after opening the box, so that if the items are still kept in the packaging box, a good dustproof effect cannot be obtained.

Utility model content

The utility model provides a packaging box with a pulling and tearing device to solve the problems in the prior art that the packaging box is not easy to open, and it is not easy to cover it back after opening

The utility model provides a packaging box with a pulling and tearing device, the pulling and tearing device is a continuous pulling and tearing of three side panels or four side panels pasted on the packaging box through an adhesive layer. strip; the side plate where the end of the drawing and tearing strip is located is provided with an easy-tearing line, and the easy-tearing line is arranged on the upper and lower sides of the drawing and tearing strip.

Further, the packing box is integrally formed of plates, and the packing box includes in a longitudinal direction: a first plate, a second plate, a third plate, and a fourth plate that are sequentially connected in a bendable manner. The opposite sides of a plate are respectively bendably connected to the first upper wing and the first lower wing, and the opposite sides of the second plate are respectively bendably connected to the second upper wing and the second lower wing. Flanges, the opposite sides of the third plate are respectively bendably connected to the third upper wing and the third lower wing, and the opposite sides of the fourth plate are respectively bendably connected to the fourth upper For the wing plate and the fourth upper wing plate, the areas of the first plate and the third plate are equal, and the areas of the second plate and the fourth plate are equal.

Furthermore, the packing box is also provided with an extension plate in the direction in which the first plate, the second plate, the third plate and the fourth plate are successively connected, and the extension plate is connected to the fourth plate by bending, and the An adhesive layer is also provided on the surface of the extension board, and the extension board is connected with the first board through the adhesive layer to form a packing box.

Furthermore, a U-shaped easy-tear line is also arranged on the side plate of the packing box adjacent to the easy-tear line, and the two ends of the U-shaped easy-tear line are respectively connected with the easy-tear lines on the upper and lower sides of the pull-out strip. The tear lines meet or are adjacent.

Furthermore, the pulling and tearing strips are pasted on the three side panels of the packaging box, and bending lines are also provided on the side panels of the packaging box that are not pasted with the pulling and tearing strips.

Furthermore, the extension board is connected to the outside of the first board through an adhesive layer, and the pull-out strip is pasted on the inside of the first board, the second board, the third board, and the fourth board of the packing box, and One end of the pull-out strip extends to the extension plate, and the easy-tear lines on the upper and lower sides of the pull-out strip are set on the extension plate.

Furthermore, the pulling and tearing strips are pasted on the inner side of the first plate, the second plate, the third plate and the fourth plate of the packaging box, and the extension plate is also provided with an opening structure. In the state of being connected with the first board, the opening structure is located at the sticking place of the pull-out tear strip and the first board.

Furthermore, one end of the pull-out strip is set on the fourth plate and is adjacent to the extension plate, the easy-tear line is set on the fourth plate, and the U-shaped easy-tear line is set on the The first plate is adjacent to the fourth plate, and the U-shaped easy-tear line is located at the opening structure of the extension plate, and the two ends of the U-shaped easy-tear line are respectively torn from the drawing The easy-tear lines on the upper and lower sides of the strip are connected or adjacent.

Further, the packing box is a cardboard box.

Compared with the prior art, the utility model has the following beneficial effects:

1. The pull-out strip is used as the pull-out device. Since the pull-out strip is pasted on the side panel of the packing box through the adhesive layer, it can fix the part of the side panel structure that is directly attached to the adhesive layer (or Reinforcement) results in that when the pull-out strip is pulled, the part of the side plate structure fixed by the pull-out strip and the adhesive layer will not be torn, while the side plate structures located on both sides of the pull-out strip Then because it is not fixed, when pulling the tear strip, it will be damaged along the pulling direction of the pull tear strip due to the pulling force, and the packing box will be damaged in a small range, so as to achieve the effect of opening the packing box;

2. At the same time, the utility model enables the packing box to have a quick opening function by adopting the pull-out tearing strip. When opening the packing box, the recipient only needs to pull the pull-out tearing device to quickly open the packing box. Effect;

3. In addition, the utility model adopts the drawing and tearing strip as the drawing and tearing device. Compared with the easy-to-tear line and other structures that require pre-cutting or punching of the packaging box, it can ensure that the packaging box can be opened before opening to the greatest extent. It is an integral structure or an integrated structure, which has higher durability and safety than packaging boxes with easy-tear lines, and avoids accidental opening of the packaging box during transportation.

Description of drawings

Fig. 1 is the expanded schematic diagram of the packing box structure of the embodiment of the utility model;

Fig. 2 is a schematic diagram of the unfolded structure of the embodiment of the utility model with an extension plate;

Fig. 3 is a schematic diagram of the structural expansion of the three-sided tearable packaging box according to the embodiment of the present invention;

Fig. 4 is a schematic diagram of the splicing structure of the three-sided tearable packaging box of the embodiment of the present invention;

Fig. 5 is a schematic diagram of the sealing structure of the three-side tearable packaging box according to the embodiment of the present invention;

Fig. 6 is a schematic diagram of the tearing process of the three-sided tearable packaging box according to the embodiment of the present invention;

Fig. 7 is a schematic diagram of the end state of the tearing of the three-sided tearable packaging box according to the embodiment of the present invention;

Fig. 8 is a schematic diagram of the opening state of the three-sided tearable packaging box according to the embodiment of the present invention;

Fig. 9 is a schematic diagram showing the expansion of the structure of the packing box with the easy-to-tear line on the extension plate of the embodiment of the present invention;

Fig. 10 is a schematic diagram of the packaging structure of the packing box with the extension board having the easy-tear line according to the embodiment of the utility model;

Fig. 11 is a schematic diagram of the structure of the pull-out head of the extension plate in the embodiment of the present invention;

Fig. 12 is a schematic diagram of the tearing process of drawing and tearing strips according to the embodiment of the present invention;

Fig. 13 is a schematic diagram of an opening structure of an extension plate according to an embodiment of the present invention;

Figure 14 is a schematic diagram of the splicing structure of the utility model embodiment;

Figure 15 is a schematic diagram of the structure of the plate surrounded by the removal of the U-shaped easy-to-tear line in the embodiment of the utility model;

Fig. 16 is a schematic structural view of the end of the pull-out strip located in the middle of the side plate according to the embodiment of the utility model;

Fig. 17 is a schematic structural view of a plurality of drawing and tearing strips in an embodiment of the present invention;

Fig. 18 is a schematic diagram of the sealing structure of the packaging box with multiple pulling and tearing strips according to the embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the utility model. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

It should be noted that the terms "first" and "second" in the specification and claims of the present utility model and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence .

The embodiment of the utility model discloses a packaging box with a pulling and tearing device. As shown in Figure 1, the pulling and tearing device 6 is three side panels or four The continuous drawing and tearing strip 6 of the side plate; the side plate where the end of the drawing and tearing strip 6 is located is provided with an easy-to-tear line 21, and the easy-to-tear line 21 is arranged on the side of the drawing and tearing strip 6 Up and down sides.

In particular, as shown in Figure 1, the packing box is integrally formed of plates, and the packing box includes in a longitudinal direction: a first plate 1, a second plate 2, and a third plate that are sequentially connected in a bendable manner. 3. The fourth plate 4, the opposite sides of the first plate 1 are respectively bendably connected to the first upper wing 1A and the first lower wing 1B, and the opposite sides of the second plate 2 are respectively The second upper wing 2A and the second lower wing 2B are bendably connected, and the opposite sides of the third plate 3 are respectively bendably connected to the third upper wing 3A and the third lower wing 3B, The opposite sides of the fourth plate 4 are respectively bendably connected to the fourth upper wing plate 4A and the fourth upper wing plate 4B, the area of the first plate 1 and the third plate 3 are equal, and the The area of the second plate 2 is equal to that of the fourth plate 4 .

Wherein, as shown in FIG. 1 , the first plate 1 and the third plate 3 have the same shape, and the second plate 2 and the fourth plate 4 have the same shape. The pulling and tearing strip 6 is pasted on the inner side of the second plate 2, the third plate 3, and the fourth plate 4, and the two ends of the pulling and tearing strip 6 are respectively connected to the edges of the second plate 2 and the fourth plate 4. catch. The two easy-to-tear lines 21 are located on both sides of the pull-out strip 6 at one end of the second board 2 , and the distance between the two easy-tear lines 21 is not less than the width of the pull-out strip 6 . In addition, two easy-tear lines 41 are provided on both sides of one end of the fourth board 4 on the pull-out strip 6 . It should be noted that, as shown in Figure 1, the easy-to-tear line 21 and the easy-to-tear line 41 are relatively short in length, and only have the effect of pulling one end of the pull-out strip 6 conveniently. Mainly.

The embodiment of the utility model adopts the pulling and tearing device 6 to make the packaging box have a quick opening function, and the recipient only needs to tear the pulling and tearing device 6 to destroy the structure of the packaging box in a small range, so as to quickly open the package. box effect. In addition, the embodiment of the utility model adopts the drawing and tearing strip 6 as the drawing and tearing device 6. Compared with the structure that requires pre-cutting or punching the packaging box such as the easy-to-tear line, it can ensure that the packaging box is in the maximum extent. It is an integral structure or an integrated structure before opening, which has higher durability and safety than packaging boxes with easy-to-tear lines, and avoids accidental opening of the packaging box during transportation. Simultaneously, the utility model embodiment sets easy-tear line 21 and easy-tear line 41 at the two ends of pull-out strip 6, so that the recipient can quickly pull the pull-tear line through easy-tear line 21 and easy-tear line 41. 6 Both ends are pulled up to facilitate pulling and tearing the strip 6.

In particular, as shown in Figure 2, the packing box is also provided with an extension plate 5 in the direction in which the first plate 1, the second plate 2, the third plate 3, and the fourth plate 4 are successively connected. It can be bent and connected with the fourth board 4 , and an adhesive layer is provided on the surface of the extension board 5 , and the extension board 5 is connected with the first board 1 through the adhesive layer to form a packing box.

Wherein, the area of the extension board 5 is smaller than that of the first board 1 , and the extension board 5 can be attached to the inner side or the outer side of the first board 1 through an adhesive layer.

Particularly, as shown in Figure 3, a U-shaped easy-tear line 12 is also arranged on the side plate of the packing box adjacent to the easy-tear line 21, and the two ends of the U-shaped easy-tear line 12 are respectively connected with the drawing The easy-to-tear lines 21 on the upper and lower sides of the tear strip 6 are connected or adjacent.

In particular, the pulling and tearing strip 6 is pasted on three side panels of the packaging box, and the side panels of the packaging box that are not pasted with the pulling and tearing strip 6 are also provided with bending lines 11 .

Wherein, as shown in Fig. 3, the drawing and tearing strip 6 is pasted on the second board 2, the third board 3, the fourth board 4, the U-shaped easy-to-tear line 12 is arranged on the first board 1, and the U The two ends of the easy-to-tear line 12 are connected to two easy-to-tear lines 21 respectively. The bending line 11 is provided on the first board 1 , and the extension board 5 is also provided with a bending line 51 at the position of the bending line 11 .

When sealing the box, as shown in FIG. 4 , the extension board 5 is connected to the inner side of the first board 1 , so that the first board 1 and the fourth board 4 are spliced together. As shown in Figure 5, the first upper wing plate 1A, the first lower wing plate 1B, the second upper wing plate 2A, the second lower wing plate 2B, the third upper wing plate 3A, the third lower wing plate 3B, The fourth upper wing 4A and the fourth upper wing 4B are bent, and adhesive tape is used to glue the gaps to complete the box sealing.

When opening, as shown in FIG. 5 , the board structure surrounded by the U-shaped easy-to-tear line 12 is pressed or snapped apart along the U-shaped easy-to-tear line 12 to form a pulling head that can be used for traction. As shown in Figure 6, pull the drawing head to make the drawing and tearing strip 6 gradually open along the direction of the easy-tearing line 21, and pull the second plate 2, the third plate 3, and the fourth plate through the drawing and tearing strip 6. 4 is completely torn apart to form the upper cover 7 and the lower box 8, as shown in Figure 7, only the first plate 1 is kept as a complete structure. As shown in FIG. 8 , the lid body 7 and the box body 8 can be bent through the bending line 11 on the first board 1 , so that the lid body 7 and the box body 8 can be opened or closed.

The embodiment of the utility model is provided with a U-shaped easy-tear line 12 structure, and the plate surrounded by the U-shaped easy-tear line 12 forms an extraction head structure. The head structure can quickly pull out one end of the pulling and tearing strip 6 , which is convenient for the user to pull the pulling and tearing strip 6 . In addition, in the embodiment of the present invention, by setting the bending line 11 on the first plate 1, the lid body 7 and the box body 8 formed after the packaging box is opened can be freely bent, which facilitates the opening and closing of the packaging box.

Specifically, as shown in Figure 9, the extension board 5 is connected to the outside of the first board 1 through an adhesive layer, and the pull-out strip 6 is pasted on the first board, the second board, the third board of the packing box. board, the inside of the fourth board, and one end of the drawing and tearing strip 6 extends to the edge of the extension board 5, the two easy-to-tear lines 52 are arranged on the extension board 5, and the two easy-to-tear lines The line 52 meets the edge of the extension plate 5 .

Wherein, as shown in FIG. 9 , there are two easy-tear lines 41 at the connection between the fourth plate 4 and the extension plate 5 , and the two easy-tear lines 41 are respectively connected with two easy-tear lines 52 to form a pull-out head 53 structure. The extension board 5 of the embodiment of the utility model is connected to the outside of the first board 1 through an adhesive layer, as shown in FIG. 10 , the extension board 5 is located outside the packaging box when the packing box of the embodiment of the utility model is in a sealed state.

When opening the packing box, as shown in Figure 11, the easy-to-tear line 52 is torn to form a lead-in head 53, and as shown in Figure 12, the lead-in head 53 is pulled to make the lead-in tear strip 6 close the first plate 1, The second plate 2 , the third plate 3 , and the fourth plate 4 are destroyed to form a separated cover body 7 and box body 8 .

In the embodiment of the utility model, two easy-to-tear lines 52 are arranged on the extension plate 5 to form a pull-out head 53 structure, and the user only needs to easily pull the pull-out head 53 to pull out one end of the pull-out tear strip 6 , it is convenient for the user to further open the packing box by pulling the drawing and tearing strip 6, so as to improve the opening efficiency of the packing box.

In particular, as shown in Figure 13, the pulling and tearing strip 6 is pasted on the inner side of the first plate 1, the second plate 2, the third plate 3, and the fourth plate 4 of the packing box, and the extension plate 5 An opening structure 54 is also provided, and when the extension plate 5 is connected to the first plate 1 , the opening structure 54 is located at the place where the pulling and tearing strip 6 is attached to the first plate 1 .

In particular, one end of the pull-out strip is set on the fourth plate and is adjacent to the extension plate, and the easy-tear line is set on the fourth plate,

One end of the drawing and tearing strip 6 is arranged on the fourth board 4, and is adjacent to the extension board 5, the two easy-tear lines 41 are arranged on the fourth board 4, and the U-shaped easy-tear line 13 is set Adjacent to the first plate 1 and the fourth plate 4, and the U-shaped easy-to-tear line 13 is located at the opening structure 54 of the extension plate 5, and the two ends of the U-shaped easy-to-tear line 13 are respectively It is in contact with or adjacent to the easy-tear lines 41 on the upper and lower sides of the drawing and tearing strip 6 .

Wherein, as shown in FIG. 13 , the opening structure 54 of the extension plate 5 corresponds to the position of the U-shaped easy-tear line 13 of the first plate 1 . As shown in FIG. 14 , the extension board 5 is connected to the inner side of the first board 1 to form a joint structure. Because the plate structure surrounded by the U-shaped easy-to-tear line 13 and the drawing and tearing strip 6 one end lack the connection of the extension plate 5, the plate structure 14 surrounded by the U-shaped easy-tearing line 13 and the drawing and tearing strip 6 one end are independent structures.

When the packing box is opened, as shown in Figure 15, the plate structure 14 can be pulled to separate it from the first plate 1 to form a tear hole 15, and the user can use fingers to pull and tear the hole 15. Press one end of the strip 6 to break the easy-to-tear line 41, pull out one end of the pulling strip 6, and then pull the strip 6 further, so that the strip 6 will tear the first plate 1, the second The plate 2, the third plate 3, and the fourth plate 4 are destroyed, forming a separated cover body and box body.

It should be noted that one end of the pull-out strip 6 can not only be arranged on the edge of the side plate of the packing box, as shown in Figure 16, one end of the pull-out tear strip 6 can also be set on the edge of the packing box Other locations where the side panels are away from the edge of the box.

Among them, as shown in Figure 16, the pull-out strip 6 is pasted on the second plate 2, the third plate 3, the fourth plate 4, and the two ends of the pull-out strip 6 are respectively located on the second plate 2, The fourth plate 4 is far away from its edge, and the easy-tear line 21 is located on the upper and lower sides of the end where the pull-out strip 6 is pasted on the second plate 2. When opening the packing box, only need to pass the easy-tear line 21 Pull out one end of the pulling and tearing strip 6, and then further pull the pulling and tearing strip 6 to achieve the effect of opening the packing box.

In particular, as shown in Figure 17, the pull-out tear strip is composed of a first pull-out tear strip 6, a second pull-out tear strip 9, and a third pull-out tear strip 10, and the first pull-out tear strip 6 Paste on the second board 2, the third board 3, the fourth board 4, the second drawing and tearing strip 9 is pasted on the first board 1 and the second board 2, the third drawing and tearing strip 10 Paste on the third plate 3 and the fourth plate 4, and the two ends of the first pulling tear strip 6 are respectively adjacent to one end of the second pulling tear strip 9 and the third pulling tear strip 10. A pull-out strip 6 is adjacent to the second pull-out strip 9, the first pull-out strip 6 is adjacent to the third pull-off strip 10 and is also provided with an easy-to-tear line 21, an easy-to-tear line. Line 41.

Wherein, as shown in Figure 17, the easy-to-tear line 21 and the easy-to-tear line 41 are I-shaped lines, and the upper and lower sides of the adjacent ends of the first drawing tear strip 6 and the second drawing tear strip 9 have easy The tear line 21, the upper and lower sides of the adjacent ends of the first pull-out tear strip 6 and the third pull-out tear strip 10 have easy-tear lines 41 .

Taking the second board 2 as an example, as shown in Figure 18, when the closed packing box is opened, it is only necessary to destroy the easy-tear line 21, pull out one end of the first pull-out tear strip 6, and pull out the second pull-out tear strip 6. Open one end of strip 9. The user can choose to pull the first pulling tear strip 6 or the second pulling tear strip 9 according to the actual opening needs, so as to achieve the effect of opening the packing box.

Optionally, the packing box is a cardboard box.

Wherein, the used cardboard of the utility model embodiment is corrugated paper.

The embodiment of the utility model can also use honeycomb paper as the cardboard structure of the packaging box according to actual requirements.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that After reading the description of the application, the specific implementation of the utility model can still be modified or equivalently replaced, but none of these modifications or changes departs from the protection scope of the pending claims of the utility model application.

Claims (9)

1. A packaging box with a pulling and tearing device, characterized in that, the pulling and tearing device is a continuous pulling and tearing device pasted on three side panels or four side panels of the packaging box by an adhesive layer. Opening strip: the side plate where the end of the drawing and tearing strip is located is provided with an easy-tearing line, and the easy-tearing line is arranged on the upper and lower sides of the drawing and tearing strip. 2. The packing box according to claim 1, characterized in that, the packing box is integrally formed of plates, and the packing box includes in a longitudinal direction: a first plate, a second plate, and a plate, the third plate, and the fourth plate, the opposite sides of the first plate are respectively bendably connected to the first upper wing plate and the first lower wing plate, and the opposite sides of the second plate can respectively be The second upper wing plate and the second lower wing plate are bently connected, and the opposite sides of the third plate are respectively bendably connected to the third upper wing plate and the third lower wing plate, and the fourth plate The opposite two sides are respectively bendably connected to the fourth upper wing plate and the fourth upper wing plate, the areas of the first plate and the third plate are equal, and the areas of the second plate and the fourth plate are equal. 3. The packaging box according to claim 2, characterized in that, the packaging box is also provided with an extension plate in the direction in which the first plate, the second plate, the third plate, and the fourth plate are connected successively, and the extending plate The board is connected to the fourth board by bending, and an adhesive layer is provided on the surface of the extension board, and the extension board is connected to the first board through the adhesive layer to form a packing box. 4. The packing box according to claim 3, characterized in that, a U-shaped easy-tearing line is also arranged on the side plate of the packing box adjacent to the easy-tearing line, and the two ends of the U-shaped easy-tearing line are respectively connected to The easy-tear lines on the upper and lower sides of the pull-out strip are connected or adjacent to each other. 5. The packing box according to claim 2 or 3, characterized in that, the pulling and tearing strips are pasted on the three side panels of the packing box, and the packing box without the pulling and tearing strips pasted The box side plate is also provided with bending lines. 6. The packaging box according to claim 3, wherein the extension board is connected to the outside of the first board through an adhesive layer, and the pulling and tearing strip is pasted on the first board and the second board of the packaging box. plate, the third plate, and the fourth plate, and one end of the pull-out strip extends to the extension plate, and the easy-tear lines on the upper and lower sides of the pull-out strip are set on the extension plate. 7. The packing box according to claim 4, characterized in that, the pull-out strip is pasted on the inner side of the first plate, the second plate, the third plate, and the fourth plate of the packing box, and the extending The board is also provided with an opening structure, and when the extension board is connected to the first board, the opening structure is located at the sticking place of the pull-out strip and the first board. 8. The packing box according to claim 7, wherein one end of the pull-out strip is arranged on the fourth board and is adjacent to the extension board, and the easy-tear line is arranged on the fourth board. On the plate, the U-shaped easy-to-tear line is arranged adjacent to the first plate and the fourth plate, and the U-shaped easy-to-tear line is located at the opening structure of the extension plate, and the U-shaped easy-to-tear line The two ends of the tearing line are respectively connected to or adjacent to the easy-tearing lines on the upper and lower sides of the pull-out tearing strip. 9. The packaging box of claim 1, wherein the packaging box is a cardboard box.