Packaging box

Abstract

To provide a packaging box whose lid part is prevented from being naturally opened, when re-sealing the packaging box by closing the lid part after opening the packaging box.SOLUTION: A packaging box 1 comprises body parts 2 to 5, and a lid part 6 for closing an opening 16 of the body parts 2 to 5. The lid part 6 opens and closes the opening 16 via opening / closing by being foldably provided at a first face part 2 of the body parts 2 to 5. Lid flaps 8 inserted in between the first face part 2 and a second face part 3 when the lid part 6 closes the opening 16 are provided at end edges on both sides of the lid part 6. According to the lid flaps 8, a contour is formed by a first side 80 as a connection place with the lid part 6, a second side 81 becoming perpendicular to the first side 80, and a third side 82 that connects the first side 80 and the second side 81. The third side 82 comprises contact parts 82A, 82C on a side of the first side 81 that come into contact with an inner face of the second face part 3, and a non-contact part 82B on a side of the second side 81 that comes into no contact with the inner face of the second face part 3, when opening / closing the lid part 6.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a packaging box for containing items. [Background technology]

[0002] Conventionally, packaging boxes made of sheet materials such as paper and plastic are used to store items. In general, packaging boxes include a rectangular tubular main body having a front part, a back part, and a pair of side parts, and a lid part and a bottom part that close an upper opening and a lower opening of the main body, respectively. The lid part includes a lid main body connected to the upper end edge of, for example, the front part of the main body, and an insert flap connected to the tip edge of the lid main body.

[0003] When the lid closes the upper opening of the main body, the lid body covers the upper opening, and the insertion flap is inserted between the back part and the side flaps connected to the upper edges of the pair of side parts. The lid is fixed to the back part by gluing the insertion flap to the inner surface of a pressing part provided in a part of the back part, thereby restricting the lid body from opening (see, for example, Patent Document 1).

[0004] To open the conventional packaging box described above, first, the pressing portion is pressed from the rear side to separate the insertion flap from the rear side, thereby removing the insertion flap from the rear side. The lid body, which can now be opened and closed, can then be pulled up and opened, allowing an article to be removed from the top opening. To reseal the packaging box, the lid body is closed and the insertion flap is inserted between the rear side and the side flaps. The insertion flap is held inside the rear side by friction with the side flaps, preventing the lid body from opening naturally. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Registered Utility Model Publication No. 3224507 Summary of the Invention [Problem to be solved by the invention]

[0006] The above-mentioned conventional packaging box requires a back part and side flaps to prevent the lid part from naturally opening, so the specifications of the packaging box are limited. In addition, a gap is formed between the lid part and the back part to allow a finger to be pushed in to open the lid part, and when a gap is formed, the lid part is likely to open naturally from a closed state. Therefore, even if the lid part is closed and the packaging box is resealed after opening, there is a problem that the lid part opens halfway.

[0007] An object of the present invention is to provide a packaging box that can solve the above problems. [Means for solving the problem]

[0008] The present invention relates to a packaging box for storing an article. The packaging box of the present invention includes a main body that divides an article storage space and has an opening on one axial side, and a lid that closes the opening, the lid is foldably provided on a first surface that constitutes the main body, and opens and closes the opening, and both ends of the lid are provided with lid flaps that are inserted between the first surface and a second surface facing the first surface when the lid closes the opening, the lid flap has an outline formed by a first side that is a connection point with the lid, a second side perpendicular to the first side, and a third side connecting the first side and the second side, and the third side includes an abutment portion on the first side that abuts against the inner surface of the second surface when the lid is opened or closed, and a non-abutment portion on the second side that does not abut against the inner surface of the second surface.

[0009] In the packaging box of the present invention, preferably, the abutting portion can be configured to include a curved portion connected to the non-abutting portion.

[0010] In the packaging box of the present invention, preferably, the abutment portion may further include a straight portion extending perpendicularly from the first side and connecting to the curved portion.

[0011] In addition, in the packaging box of the present invention, preferably, a guide portion is provided on the upper edge of the second surface portion protruding toward the first surface portion, the opening is formed between the guide portion and the first surface portion, and the lid flap is inserted between the first surface portion and the second surface portion on both sides of the guide portion. Effect of the Invention

[0012] According to the packaging box of the present invention, when the lid portion is closed and the packaging box is resealed after the packaging box has been opened, the lid portion can be prevented from opening naturally. [Brief description of the drawings]

[0013] [Figure 1] FIG. [Diagram 2] 1A is a plan view, (B) is a front view, and (C) is a side view of a packaging box. [Diagram 3] FIG. 2 is a perspective view of the packaging box in an opened state. [Figure 4] 13A to 13C are diagrams illustrating the operation of the lid flap when opening and closing the lid portion. [Diagram 5] FIG. 2 is a front view of a blank sheet for a packaging box. [Figure 6] FIG. 2 is a perspective view of a packaging box in the middle of being opened. [Figure 7] 1 is an enlarged view showing a lid portion of a packaging box in the middle of being opened; FIG. [Figure 8] FIG. 2 is a perspective view of the packaging box in a resealed state. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Figures 1 to 3 show the appearance of a packaging box 1 according to one embodiment of the present invention. Figures 1 and 2 show the packaging box 1 with the lid part 6 closed, and Figure 3 shows the packaging box 1 with the lid part 6 open.

[0015] The packaging box 1 is a box for storing and individually packaging items inside. The packaging box 1 includes rectangular tubular main bodies 2-5 that partition the storage space for the items, a lid 6 that closes an opening 16 on one axial side (upper side in the illustrated example) of the main bodies 2-5, and a bottom 7 that closes an opening on the other axial side (lower side in the illustrated example) of the main bodies 2-5. The main bodies 2-5 each have a rectangular outline and include four surfaces: a first surface 2 and a second surface 3 that face each other, and a third surface 4 and a fourth surface 5 that face each other.

[0016] The first surface portion 2 has a rectangular shape, although it is not particularly limited thereto. The first surface portion 2 is taller than the second surface portion 3, the third surface portion 4, and the fourth surface portion 5, and the upper edge of the first surface portion 2 protrudes upward beyond the upper edge of the opposing second surface portion 3. Outer surface portions 40, 50 are provided on both side edges of the first surface portion 2, respectively. The outer surface portions 40, 50 protrude perpendicularly to the first surface portion 2 and inward (towards the second surface portion 3).

[0017] The second surface portion 3 is, although not limited thereto, substantially rectangular. Inner surface portions 41, 51 are provided on both edge portions of the second surface portion 3. The inner surface portions 41, 51 protrude perpendicularly to the second surface portion 3 and inward (toward the first surface portion 2). The inner surface portions 41, 51 are superimposed on the inside of the outer surface portions 40, 50 and are fixed to the outer surface portions 40, 50 by, for example, an adhesive, a pressure sensitive adhesive, an adhesive tape, or a pressure sensitive adhesive tape. The outer surface portion 40 and the inner surface portion 41 provided on one edge of the first surface portion 2 and the second surface portion 3 constitute the third surface portion 4, and the outer surface portion 50 and the inner surface portion 51 provided on the other edge of the first surface portion 2 and the second surface portion 3 constitute the fourth surface portion 5.

[0018] A groove 14 is formed in the center in the width direction on the upper edge of the second surface portion 3. Groove 14 is large enough to accommodate at least one person's finger (e.g., thumb). A groove 15 is formed in the center in the width direction on the lower edge of the second surface portion 3. Groove 15 is large enough to accommodate at least one person's finger (e.g., thumb).

[0019] A guide portion 13 is provided on the upper edge of the second surface portion 3. The guide portion 13 protrudes perpendicularly to the second surface portion 3 and inward (toward the first surface portion 2). The guide portion 13 is provided on the upper edge of the second surface portion 3 with a gap corresponding to the thickness of a lid flap 8 (described later) remaining on both widthwise ends of the upper edge. In this embodiment, the guide portion 13 is provided on the upper edge of the second surface portion 3 in a portion excluding the recessed groove 14. An opening 16 is formed between the guide portion 13 and the first surface portion 2.

[0020] The lid portion 6 is, although not limited to, substantially rectangular. The lid portion 6 is provided on the first surface portion 2 in a foldable manner. Although not limited to, in this embodiment, a connecting piece 10 is provided on one long side (the edge on the first surface portion 2 side) of the lid portion 6 in a foldable manner, and the connecting piece 10 is fixed to the inner surface of the first surface portion 2 by, for example, an adhesive, a pressure-sensitive adhesive, an adhesive tape, or a pressure-sensitive adhesive tape, etc., so that the lid portion 6 is provided on the first surface portion 2 in a foldable manner. As a result, the lid portion 6 opens and closes to open and close the opening 16.

[0021] The other long side of the lid portion 6 (the edge on the second surface portion 3 side) protrudes at the center in the width direction so as to fit into the cutout portion in the center of the width direction of the guide portion 13, and the lid opening piece 11 is provided at this central protruding portion in the width direction so as to be able to be folded.

[0022] The lid opening flap 11 fits into a groove 14 on the upper edge of the second surface 3, and when the packaging box 1 is unopened, the lid opening flap 11 is connected to the second surface 3 in a state where it is fitted into the groove 14 by a perforated or half-cut cut line 17. When the packaging box 1 is unopened, the lid portion 6 is connected to the guide portion 13 in a state where it is flush with the guide portion 13 by, for example, a perforated or half-cut cut line 18. The lid bottom opening flap 11 is trapezoidal in this embodiment, but the shape is not particularly limited and may be semicircular or the like.

[0023] A pair of opposing short sides (end edges on both sides) of the lid part 6 are provided with a lid flap 8. The lid flap 8 protrudes (hangs down vertically) perpendicularly to the lid part 6 and inward (towards the bottom part 7). When the lid part 6 closes the opening 16, the lid flap 8 is inserted vertically between the first surface part 2 and the second surface part 3 as shown in Figures 3, 4, 6 and 7.

[0024] As shown in Figs. 4 and 5, the lid flap 8 has an outline formed by a first side 80 which is a connection point with the lid part 6, a second side 81 perpendicular to the first side 80, and a third side 82 connecting the first side 80 and the second side 81. The first side 80 is linear and extends vertically between the first surface part 2 and the second surface part 3 as shown in Fig. 4(A) when the lid part 6 closes the opening 16. The second side 81 is linear and extends parallel to the first surface part 2 and the second surface part 3 as shown in Fig. 4(A) when the lid part 6 closes the opening 16. The length D1 of the first side 80 shown in Fig. 4(A) (the distance from the intersection O of the first side 80 and the second side 81 to the tip of the first side 80) is longer than the length D4 of the second side 81 shown in Fig. 4(D) (the distance from the intersection O of the first side 80 and the second side 81 to the tip of the second side 81).

[0025] The length D1 of the first side 80 is the same as the distance between the first surface portion 2 and the second surface portion 3 (the length from the inner surface of the first surface portion 2 to the inner surface of the second surface portion 3). When the lid portion 6 closes the opening 16, the tip of the first side 80 reaches the inner surface of the second surface portion 3 as shown in FIG. 4(A). In this embodiment, since the lid portion 6 is provided on the inner surface of the first surface portion 2 via the connecting piece 10, the length D1 of the first side 80 of the lid flap 8 may be shorter than the distance between the first surface portion 2 and the second surface portion 3 by the thickness of the connecting piece 10 in the strict sense, but is substantially the same length as the distance between the first surface portion 2 and the second surface portion 3.

[0026] The length D4 of the second side 81 is shorter than the distance between the first surface portion 2 and the second surface portion 3. As shown in Fig. 4(D) , when the lid portion 6 opens the opening 16, the tip of the second side 81 does not reach the inner surface of the second surface portion 3. When the lid portion 6 is further pushed in after the lid portion 6 closes the opening 16, the tip of the second side 81 hits the inner surface of the first surface portion 2, thereby preventing the lid portion 6 from being pushed in further.

[0027] The third side 82 includes contact portions 82A, 82C on the first side 80 side and a non-contact portion 82B on the second side 81 side. The contact portions 82A, 82C include a curved portion 82A on the non-contact portion 82B side and a straight portion 82C on the first side 80 side.

[0028] The straight line portion 82C extends perpendicularly and linearly from the first side 80. As can be seen from FIG. 4A, the distance of the straight line portion 82C from the intersection O of the first side 80 and the second side 81 is equal to or greater than the length D1 of the first side 80. Therefore, the distance of the straight line portion 82C from the intersection O of the first side 80 and the second side 81 is longer than the distance between the first surface portion 2 and the second surface portion 3.

[0029] The curved portion 82A extends from the straight portion 82C in a curved shape (for example, in a circular arc shape) and connects to the non-contact portion 80B. As shown in FIG. 4B, the distance D2 from the intersection point O of the first side 80 and the second side 81 of the curved portion 82A is longer than the distance between the first surface portion 2 and the second surface portion 3. At the connection point of the curved portion 82A with the non-contact portion 82B, the distance D2 from the intersection point O of the first side 80 and the second side 81 is the same as the distance between the first surface portion 2 and the second surface portion 3. Since the curved portion 82A is curved, the curved portion 82A smoothly contacts the inner surface of the second surface portion 3 when the cover portion 6 is opened or closed, as will be described in detail later. The curved portion 82A does not necessarily have to be curved, and may be a polygonal line shape close to a curved line shape by connecting multiple line segments at obtuse angles.

[0030] The non-contact portion 82B extends from the curved portion 80A and is connected to the second side 81. As shown in FIG. 4C, the distance D3 from the intersection O of the first side 80 and the second side 81 of the non-contact portion 82B is shorter than the distance between the first surface portion 2 and the second surface portion 3. Note that the distance D3 from the intersection O of the first side 80 and the second side 81 at the connection point of the non-contact portion 82B with the curved portion 82A is the same as the distance between the first surface portion 2 and the second surface portion 3. The non-contact portion 82B is curved in this embodiment, but may be a polygonal line in which a plurality of line segments are connected at an angle.

[0031] As shown in Figures 4(A) to (D), when the lid part 6 is opened or closed, the lid flap 8 moves between a position where the opening 16 is closed and a position where the opening 16 is opened while rotating around the intersection point O of the first side 80 and the second side 81. At this time, the lid flap 8 abuts against the inner surface of the second surface part 3 as shown in Figures 4(A) and (B) because the distance from the intersection point O of the first side 80 and the second side 81 at the abutment parts 82A and 82C is the same as or longer than the distance between the first surface part 2 and the second surface part 3. On the other hand, the lid flap 8 does not abut against the inner surface of the second surface part 3 as shown in Figures 4(C) and (D) because the distance from the intersection point O of the first side 80 and the second side 81 at the non-abutment part 82B is shorter than the distance between the first surface part 2 and the second surface part 3.

[0032] 6 and 7, when the lid portion 6 is opened or closed, the lid flap 8 is inserted between the first surface portion 2 and the second surface portion 3 in the gaps on both sides of the guide portion 13 in the width direction, that is, between the guide portion 13 and the third surface portion 4 and the fourth surface portion 5. By guiding the lid flap 8 by the guide portion 13, the lid flap 8 is restricted from bending inward from a state in which it is bent perpendicular to the lid portion 6, and in a state in which it is bent perpendicular to the lid portion 6, it is inserted and removed between the first surface portion 2 and the second surface portion 3 as the lid portion 6 is opened or closed.

[0033] The bottom 7 is, although not limited to, rectangular. As shown in Fig. 1 to Fig. 3, the first surface 2 and the second surface 3 are provided to stand vertically on a pair of opposing long sides of the bottom 7 (the edges on the first surface 2 side and the second surface 3 side). Bottom flaps 9 (shown in Fig. 5) are provided to stand vertically on a pair of opposing short sides (the edges on both sides) of the bottom 7, and the third surface 4 and the fourth surface 5 are located outside the bottom flaps 9.

[0034] A bottom opening flap 12 is provided in a foldable manner at the center of the width direction of one long side of the bottom 7 (the edge on the second surface 3 side). The bottom opening flap 12 fits into a groove 15 at the lower edge of the second surface 3, and when the packaging box 1 is in an unopened state, the bottom opening flap 12 is connected to the second surface 3 in a state where it is fitted into the groove 15 by a perforated or half-cut cut line 19. When the packaging box 1 is in an unopened state, the bottom 7 is connected to the second surface 3 by a perforated or half-cut cut line 20. In this embodiment, the bottom opening flap 12 is trapezoidal, but the shape is not particularly limited and may be semicircular or the like.

[0035] The above-mentioned packaging box 1 can be assembled from one blank sheet 100 shown in Fig. 5. The shape of the blank sheet 100 is not limited to the shape shown in Fig. 5. The blank sheet 100 can be formed using various known paper materials such as thick paper and corrugated cardboard, but the material of the blank sheet 100 is not limited to the above-mentioned paper materials.

[0036] In the blank sheet 100, the first surface portion 2, the bottom portion 7, the second surface portion 3, the lid portion 6, and the connecting piece 10 are connected to be aligned in a straight line in one direction (vertical direction in FIG. 5). A bottom opening piece 12 is connected to a part between the first surface portion 2 and the bottom portion 7. A lid opening piece 11 is connected to a part between the second surface portion 3 and the lid portion 6, and a guide portion 13 is connected to the remaining part. The first surface portion 2 is connected to outer surface portions 40, 50 on both sides in the other direction (horizontal direction in FIG. 4) perpendicular to the one direction. The bottom portion 7 is connected to bottom flaps 9 on both sides in the other direction (horizontal direction in FIG. 4). The second surface portion 3 is connected to inner surface portions 41, 51 on both sides in the other direction (horizontal direction in FIG. 4). The lid portion 6 is connected to lid flaps 8 on both sides in the other direction (horizontal direction in FIG. 4).

[0037] A line 21 is provided at the boundary between the first surface portion 2 and the bottom portion 7, and the first surface portion 2 can be folded relative to the bottom portion 7. A line 22 is provided at the boundary between the bottom surface portion 7 and the bottom opening piece 12, and the bottom opening piece 12 can be folded relative to the bottom surface portion 7. A cut line 19 is provided at the boundary between the bottom opening piece 12 and the second surface portion 3, and the bottom opening piece 12 can be separated from the second surface portion 3. A cut line 20 is provided at the boundary between the bottom surface portion 7 and the second surface portion 3, and the second surface portion 3 can be folded relative to the bottom portion 7 and the bottom portion 7 can be separated from the second surface portion 3. A line 23 is provided at the boundary between the second surface portion 3 and the guide portion 13 and at the boundary between the lid opening piece 11 and the lid portion 6, and the guide portion 13 can be folded relative to the second surface portion 3, and the lid opening piece 11 can be folded relative to the lid portion 6. A cut line 17 is provided at the boundary between the lid opening piece 11 and the second surface portion 3, so that the lid opening piece 11 can be separated from the second surface portion 3. A cut line 18 is provided at the boundary between the lid portion 6 and the guide portion 13, so that the lid portion 6 can be separated from the guide portion 13. Lines 25, 26 are provided at the boundary between the first surface portion 2 and the outer surface portions 40, 50, so that the outer surface portions 40, 50 can be folded relative to the first surface portion 2. Lines 27, 28 are provided at the boundary between the bottom portion 7 and the bottom flap 9, so that the bottom flap 9 can be folded relative to the bottom portion 7. Lines 29, 30 are provided at the boundary between the second surface portion 3 and the inner surface portions 41, 51, so that the inner surface portions 41, 51 can be folded relative to the second surface portion 3. Lines 31, 32 are provided at the boundary between the lid portion 6 and the lid flap 8, so that the lid flap 8 can be folded relative to the lid portion 6.

[0038] Next, a procedure for assembling the packaging box 1 using the blank sheet 100 shown in Fig. 5 will be described. First, the first surface 2, bottom 7, second surface 3, and lid 6 are folded 90 degrees at their borders, and the connecting piece 10 connected to the lid 6 is folded 90 degrees and attached to the inner surface of the first surface 2, thereby connecting the first surface 2, bottom 7, second surface 3, and lid 6 into a rectangular tube shape. The packaging box 1 is supplied to a user in this rectangular tube shape (specifically, in a flattened state), and the user stores an article in the internal space.

[0039] When the article is stored, the pair of lid flaps 8 are folded 90 degrees at the boundary with the lid portion 6, and the pair of bottom flaps 9 are folded 90 degrees at the boundary with the bottom portion 7, so that they are interposed between the first surface portion 2 and the second surface portion 3. Thereafter, the inner surface portions 41, 51 are folded 90 degrees at the boundary with the second surface portion 3, and the outer surface portions 40, 50 are folded 90 degrees at the boundary with the first surface portion 2 to be overlapped on the outside of the inner surface portions 41, 51. The outer surface portions 40, 50 are then attached to the inner surface portions 41, 51 to form the third surface portion 4 and the fourth surface portion 5. In this manner, the packaging box 1 shown in FIG. 1 is assembled.

[0040] The assembled packaging box 1 can be opened by cutting the lid opening piece 11 from the second surface 3 along the cut line 17, and then cutting the lid 6 from the guide 13 along the cut line 18. As shown in Fig. 3, when the lid 6 is opened, the contents, ie, articles, can be removed from the packaging box 1 through the opening 16. After opening the packaging box 1, the packaging box 1 can be resealed by closing the lid 6 as shown in Fig. 8, and further opening and closing can be repeated.

[0041] After all the contents have been removed, (not shown), the bottom opening flap 12 of the packaging box 1 is cut off from the second surface 3 along the cut line 19, and then the bottom 7 is cut off from the second surface 3 along the cut line 20, whereby the packaging box 1 can be folded by opening the bottom 7, and the packaging box 1 can be easily disposed of.

[0042] According to the above-described packaging box 1, when the lid portion 6 is closed and the packaging box 1 is resealed after opening the packaging box 1, as shown in Figures 4(A) and 4(B), the abutment portions 82A, 82C of the lid flap 8 on both sides of the lid portion 6 abut against the inner surface of the second surface portion 3. Therefore, the lid portion 6 is prevented from opening naturally due to friction between the lid flap 8 and the second surface portion 3, and the lid portion 6 can be maintained in a closed state.

[0043] Furthermore, when opening the lid portion 6, since the curved portion 82A of the abutment portions 82A, 82C of the lid flap 8 is smoothly curved, the curved portion 82A smoothly abuts against the inner surface of the second surface portion 3. Therefore, the lid portion 6 can be opened smoothly even if the lid flap 8 abuts against the inner surface of the second surface portion 3. Furthermore, when the lid portion 6 is opened to a certain extent, as shown in Figures 4(C) and 4(D), the lid flap 8 does not abut against the inner surface of the second surface portion 3 at the non-abutment portion 82B of the lid flap 8, so that the lid portion 6 can be fully opened without difficulty, and the contents, i.e., the articles, can be easily removed.

[0044] When opening and closing the lid portion 6, the lid flap 8 is inserted and removed between the first surface portion 2 and the second surface portion 3 while being guided by the guide portion 13 as shown in Figs. 6 and 7. As a result, the lid flap 8 is maintained in a state bent perpendicularly to the lid portion 6 and follows the inner surfaces of the third surface portion 4 and the fourth surface portion 5, so that it is possible to prevent the lid flap 8 from interfering with the contents, i.e., the opening and closing of the lid portion 6, from being hindered. In addition, when the lid flap 8 is bent inward (in a direction away from the third surface portion 4 and the fourth surface portion 5), the abutment portions 82A and 82C of the lid flap 8 are less likely to abut the inner surface of the second surface portion 3, so that the lid portion 6 is more likely to open naturally, but the guide portion 13 maintains the state in which the lid flap 8 is bent perpendicularly to the lid portion 6, so that it is possible to effectively prevent the lid portion 6 from being more likely to open naturally.

[0045] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the spirit of the present invention. Modifications are exemplified below.

[0046] In the above embodiment, the lid portion 6 is provided on the inner surface of the first surface portion 2 via the connecting piece 10. As a modified example, the lid portion 6 may be connected to the upper edge of the first surface portion 2 so as to be foldable.

[0047] In the above embodiment, the third surface portion 4 and the fourth surface portion 5 are configured from two members (the outer surface portions 40, 50 and the inner surface portions 41, 51). As another modified example, the third surface portion 4 and the fourth surface portion 5 may be configured from a single member, and the main body portions 2 to 5 may be formed by connecting the first surface portion 2, the second surface portion 3, the third surface portion 4, and the fourth surface portion 5 into a rectangular tube shape via connecting pieces.

[0048] In the above embodiment, the guide portion 13 is provided between the cover portion 6 and the second surface portion 3. As another modified example, the cover portion 6 may be directly connected to the second surface portion 3 by a cut line so as to be separable, without the guide portion 13 therebetween.

[0049] In the above embodiment, the lid portion 6 is composed of one member. In another modified example, the lid portion 6 may be composed of two members, an inner lid portion and an outer lid portion, and lid flaps may be provided continuously to both side edges of the outer lid portion. [Explanation of symbols]

[0050] 1 Packaging box 2. First surface of the main body 3. Second surface of the main body 4. Third surface of main body 5. Fourth surface of main body 6 Lid 8 Lid flap 13 Guide section 16 Opening 80 First side of the lid 81 Second side of the lid 82 Third side of the lid 82A Curved part of the contact part 82B Non-contact part 82C Straight section of contact

Claims

1. A packaging box for containing an item, The container has a main body that defines an article storage space and has an opening on one axial side, and a lid that closes the opening, the lid portion is foldably provided on the first surface portion constituting the main body portion to open and close the opening portion, a lid flap is provided on each of both end edges of the lid portion to be inserted between the first surface portion and the second surface portion facing the first surface portion when the lid portion closes the opening, The lid flap has an outline formed by a first side which is a connection point with the lid portion, a second side perpendicular to the first side, and a third side connecting the first side and the second side, the third side includes an abutment portion on the first side that abuts against an inner surface of the second surface when the lid portion is opened or closed, and a non-abutment portion on the second side that does not abut against the inner surface of the second surface, The abutment portion is a curved portion connected to the non-contact portion; and a straight portion extending perpendicularly from the first side and connecting to the curved portion.

2. a guide portion protruding toward the first surface portion is provided on an upper edge of the second surface portion, and the opening portion is formed between the guide portion and the first surface portion; The packaging box according to claim 1 , wherein the lid flaps are inserted between the first surface portion and the second surface portion on both sides of the guide portion.

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