Three-dimensional bag

Abstract

A bag body of the three-dimensional bag comprises a bottom face located at the bottom of the bag body in the height direction, a pair of front faces and a pair of side faces, the front faces and the side faces are erected on the peripheral side of the bottom face, the front faces are arranged in the width direction of the bag body at intervals, and the side faces are connected with the edges of the two sides of the front faces respectively. The upper end of each front face is provided with a first bag opening folding edge which is bent towards the inner surface of the corresponding front face, and the upper end of each side face is provided with a second bag opening folding edge which is bent towards the inner surface of the corresponding side face. A guide notch extending in the height direction is formed in a folding edge bending part, extending in the height direction, of the first bag opening folding edge and the second bag opening folding edge, and the guide notch extends towards the bag opening of the three-dimensional bag from the lower end of the folding edge bending part in the height direction. According to the three-dimensional bag, the strength of the bag opening can be enhanced, and the guiding notch is ingeniously formed between the first bag opening folding edge and the second bag opening folding edge, so that the problem of material stacking at the corner of the bag opening in the folding process is solved.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and in particular to a three-dimensional bag. Background Technology

[0002] Stand-up pouches, as a common packaging container, are widely used in the retail, food, and apparel industries. Their structure typically includes a pair of front panels, a pair of side panels, and a bottom panel. The bottom panel is located below the pair of front panels and side panels. These multiple panels connect to form an open, accommodating cavity through which objects can be placed for storage or transportation.

[0003] Generally, the opening of a stand-up pouch is formed directly from the top of the side wall of the bag body. It is made of the same material as the side wall and opens outwards. Since objects enter and exit through this opening, the opening of a stand-up pouch is a part that is very easily worn. To strengthen the opening of a stand-up pouch, the edge of the opening is bent inwards to form a folded edge, which greatly enhances the strength of the opening.

[0004] Meanwhile, the design of stand-up pouches needs to balance load-bearing strength and folding convenience, ensuring that the pouch can not only carry items well but also be easily stored and transported. In existing technologies, a pair of sides of the stand-up pouch are typically folded inwards, with the bottom folded inwards, and the two front sides fitting together. However, because the pouch opening has folded edges, the multiple layers of material (side, front, and corresponding folded edges) accumulate significantly at the corners of the opening on both sides. This significantly hinders folding and causes the folded stand-up pouch to bulge at the corners due to material accumulation, affecting the flatness of the folded pouch. Utility Model Content

[0005] The purpose of this invention is to solve the technical problem in the prior art that, during the folding process of a three-dimensional bag, the corners of the front and side openings are severely piled up with multiple layers of material (side, front, and corresponding opening edges on both sides) due to the bag opening folds. On the one hand, this greatly hinders the folding of the bag; on the other hand, the folded three-dimensional bag will bulge at the corners due to the material pile, affecting the flatness of the folded three-dimensional bag.

[0006] To address the aforementioned technical problems, this utility model discloses a three-dimensional bag, which solves the technical issues of material bulging at the corners and poor flatness when traditional three-dimensional bags are folded. Specifically, the bag body of the three-dimensional bag includes a bottom surface located at the bottom of the bag body along the height direction, and a pair of front faces and a pair of side faces standing upright on the periphery of the bottom surface. The pair of front faces are spaced apart along the width direction of the bag body, and the pair of side faces are respectively connected to the two side edges of the pair of front faces. The pair of front faces, the pair of side faces, and the bottom surface together form a cavity for holding objects.

[0007] Each front end has a first bag opening fold at the top, which bends toward the inner surface of the corresponding front end, and each side end has a second bag opening fold at the top, which bends toward the inner surface of the corresponding side.

[0008] Furthermore, the bent portion of the first bag opening and the second bag opening, which are connected to each other, extends along the height direction and forms a guide cut extending along the height direction. The guide cut extends from the lower end of the bent portion of the folded edge towards the bag opening of the three-dimensional bag along the height direction.

[0009] In this embodiment, the three-dimensional bag holds an object within a cavity formed by multiple surfaces (a pair of front surfaces, a pair of side surfaces, and a bottom surface). Furthermore, the first bag opening fold at the top of the front surface and the second bag opening fold at the top of the side surface reinforce the upper edges of the front and side surfaces respectively, significantly increasing the strength of the bag opening and reducing the risk of tearing. Simultaneously, guide slits are formed at the junction of the first and second bag opening folds, providing deformation space for bending of both folds.

[0010] Specifically, when the bag body of the stand-up pouch is folded along the center line of a pair of sides, the first and second bag opening folds will press against each other. The corners of the bag opening originally need to compress multiple layers of material. The presence of the guide slit allows the material to be displaced in the direction of the slit, reducing the stacking of material at the corners of the bag opening toward the outside of the bag body (the direction that causes the protrusion), thereby reducing the protrusion height at the corners of the bag opening. On the one hand, this reduces the resistance during manual or mechanical folding, making the operation smoother. On the other hand, it also makes the bag body flatter after folding.

[0011] Therefore, the three-dimensional bag provided by the embodiments of this utility model can not only effectively enhance the strength of the bag opening, but also cleverly set a guide slit between the first bag opening fold and the second bag opening fold, thereby solving the problem of material piling up at the corner of the bag opening during the folding process.

[0012] Furthermore, in one embodiment, the guide cut extends at least to the middle position of the folded edge in the height direction. Additionally, a connecting portion for connecting the first bag opening fold and the second bag opening fold is formed on the folded edge, above the guide cut.

[0013] Specifically, the length of the connecting part on the folded edge is between 2 and 4 times the thickness of the side wall of the bag.

[0014] In this embodiment, the guide cut extends at least to the middle position of the folded edge in the height direction to ensure that the deformation of the first and second bag opening folds can be well guided. If the extension length of the guide cut is shorter than the length of the folded edge in the height direction (for example, less than half the length of the folded edge in the height direction), a more obvious material accumulation will form above the folded edge.

[0015] Furthermore, the connecting portion formed above the folded edge connects the first and second bag opening folds, preventing the upper edge of the bag's sidewall from tearing when a large object is placed inside. Simultaneously, the length of the connecting portion at the folded edge is 2 to 4 times the thickness of the bag's sidewall, creating a continuous first and second bag opening fold along the upper edge of the bag, which also contributes to the bag's aesthetic appeal.

[0016] Of course, in another embodiment, the guide cut extends through the entire folded edge in the height direction. This not only improves the problem of material piling up at the corner of the bag opening when folding the stand-up pouch, but also allows the first bag opening fold on the front and the second bag opening fold on the side to be bent separately during production. Compared with bending the entire bag opening fold directly, this reduces the difficulty of the processing technology.

[0017] Specifically, this utility model also discloses a three-dimensional bag, in which the guide cut is a cut slit extending along the height direction. During the production of the three-dimensional bag, there is no need to cut the material located between the first and second bag opening folds. When the first bag opening fold is bent and attached to the inner surface of the front, and the second bag opening fold is bent and attached to the inner surface of the side, the side edges where the first and second bag opening folds meet in the unfolded state of the three-dimensional bag fit together tightly, making the three-dimensional bag more aesthetically pleasing and giving it a high-end feel.

[0018] In another embodiment, the guide cut of this 3D bag is a guide notch extending along the height direction. During the production of the 3D bag, the material within the guide notch needs to be cut. After the first bag opening fold is bent and attached to the inner surface of the front, and the second bag opening fold is bent and attached to the inner surface of the side, the side edges where the first and second bag opening folds meet are spaced apart. During the folding process, both the first and second bag opening folds will move towards the guide notch and fill it, making the folded 3D bag flatter. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a three-dimensional bag provided for an embodiment of this utility model;

[0020] Figure 2 A schematic diagram of the structure of a three-dimensional bag (without bending the second bag opening edge) provided for an embodiment of this utility model;

[0021] Figure 3 A partial schematic diagram of the three-dimensional bag located at the folded edge (with a cutting seam and a connecting part) provided for an embodiment of the present utility model;

[0022] Figure 4 A partial schematic diagram of the three-dimensional bag located at the folded edge (with a cutting seam) provided for an embodiment of this utility model;

[0023] Figure 5 A partial schematic diagram of the three-dimensional bag located at the folded edge (the guide notch is located at the end of the first bag opening folded edge in the length direction) provided for an embodiment of the present utility model;

[0024] Figure 6 A partial schematic diagram of the three-dimensional bag located at the folded edge (the guide notch is located at the end of the second bag opening folded edge in the length direction) provided for an embodiment of the present utility model;

[0025] Figure 7 A partial schematic diagram of the three-dimensional bag provided for an embodiment of the present invention, located at the folded edge (part of the guide notch is located at the end of the first bag opening fold in the length direction, and the other part is located at the end of the second bag opening fold in the length direction);

[0026] Figure 8 A partial schematic diagram of a three-dimensional bag (including handles) provided for an embodiment of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 10. 3D bags;

[0029] 100. Bag body;

[0030] 110. Bottom surface; 111. Bottom fold;

[0031] 120. Front view; 121. First pocket opening fold; 122. Handle perforation;

[0032] 130. Side view; 131. Side parting; 132. Second pocket opening fold; 133. Extension;

[0033] 101. Folded edge; 102. Guide cut; 103. Connecting part; 104. Cutting seam; 105. Guide notch;

[0034] 200. Handle;

[0035] X: width direction; Y: length direction; Z: height direction. Detailed Implementation

[0036] As noted in the background section, the design of stand-up pouches needs to balance load-bearing strength and folding convenience. The folded edge at the opening of the stand-up pouch, designed to enhance its strength, will inevitably affect the ease of folding. Excessive material accumulation during folding will not significantly hinder the folding of the pouch. Furthermore, the folded stand-up pouch will bulge at the corners of the opening due to the material accumulation, affecting the flatness of the folded stand-up pouch.

[0037] To address this issue, the present invention provides a three-dimensional bag. The bag body includes a bottom surface located at the bottom of the bag body along the height direction, a pair of front faces and a pair of side faces standing upright around the bottom surface. The pair of front faces are spaced apart along the width direction of the bag body, and the pair of side faces are respectively connected to the two side edges of the pair of front faces. Each front face has a first bag opening folded edge at its upper end, bending towards the inner surface of the corresponding front face. Each side face has a second bag opening folded edge at its upper end, bending towards the inner surface of the corresponding side face. The bent portion of the folded edge, which connects the first and second bag opening folded edges, forms a guide slit extending along the height direction. The guide slit extends from the lower end of the bent portion of the folded edge towards the bag opening of the three-dimensional bag. This three-dimensional bag, while strengthening the bag opening through the bag opening folded edges, cleverly incorporates a guide slit between the first and second bag opening folded edges, thereby resolving the problem of material piling up at the corners of the bag opening during folding.

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, the bag body 100 of this three-dimensional bag 10 includes a bottom surface 110 located at the bottom of the bag body 100 along the height direction Z, and a pair of front faces 120 and a pair of side faces 130 standing on the periphery of the bottom surface 110. The pair of front faces 120 are spaced apart along the width direction X of the bag body 100, and the pair of side faces 130 are respectively connected to the two side edges of the pair of front faces 120. The pair of front faces 120, the pair of side faces 130 and the bottom surface 110 surround and form a cavity for placing objects. When placing objects, the bag opening of the three-dimensional bag 10 is opened and the objects are placed into the cavity from the bag opening. The bottom surface 110 mainly supports the objects.

[0040] It should be noted that, regarding the sealing of the bag body 100, in one embodiment, a pair of front surfaces 120 are connected to the bottom surface 110. Each side surface 130 includes a pair of side facets 131 arranged along the width direction X. Each side facet 131 is connected to the corresponding front surface 120, and the pair of side facets 131 are bent towards each other along the side edge of the front surface 120. Furthermore, the sides of the pair of side facets 131 that are close to each other overlap and connect, thereby forming the side surface 130. The bottom surface 110 is connected to the corresponding side surface 130 on both sides of the width direction X through bottom folded edges 111. It should be noted that when the material of the bag body 100 is non-woven fabric, the pair of side facets 131 and the bottom folded edges 111 and the side surface 130 are heat-sealed. When the material of the bag body 100 is paper, the pair of side facets 131 and the bottom folded edges 111 and the side surface 130 are connected by adhesive. Regarding the specific selection of adhesive, this embodiment does not specifically limit this.

[0041] Of course, in another embodiment, each side 130 is connected to the front 120 on one side, and a connecting portion 103 is formed at the edge opposite to the front 120 on one side, and is connected to the front 120 on the other side through the connecting portion 103. This embodiment does not limit the specific connection method between the side 130 and the front 120.

[0042] For ease of understanding, the following explanation will use the example of side surface 130 including a pair of side facets 131.

[0043] like Figure 1 As shown, in this embodiment, the upper end of each front face 120 of the bag body 100 is formed with a first bag opening fold 121 that bends toward the inner surface of the corresponding front face 120, and the upper end of each side face 130 is formed with a second bag opening fold 132 that bends toward the inner surface of the corresponding side face 130.

[0044] It should be noted that when the side 130 of the three-dimensional bag 10 includes a pair of side facets 131, the upper end of each side facet 131 forms an extension 133, the ends of the extensions 133 on the pair of side facets 131 that are close to each other overlap each other, and are bent toward the inside of the bag body 100 to form a second bag opening fold 132.

[0045] Specifically, the first bag opening fold 121 and the second bag opening fold 132 are connected to each other. The folded portion 101 extending along the height direction Z is formed with a guide cut 102 extending along the height direction Z. The guide cut 102 extends from the lower end of the folded portion 101 along the height direction Z toward the bag opening of the three-dimensional bag 10.

[0046] In this embodiment, the first pocket opening fold 121 at the top of the front 120 and the second pocket opening fold 132 at the top of the side 130 reinforce the upper edges of the front 120 and side 130 respectively, greatly increasing the strength of the pocket opening and reducing the risk of tearing. Simultaneously, a guide slit 102 is formed at the junction of the first pocket opening fold 121 and the second pocket opening fold 132, providing deformation space for bending. Specifically, when the body 100 of the three-dimensional bag 10 is folded along the center line of a pair of sides 130, the first bag opening fold 121 and the second bag opening fold 132 will press against each other. The corner of the bag opening originally needs to compress multiple layers of material. The presence of the guide cut 102 allows the material to be guided to shift in the direction of the cut 102, reducing the stacking of material at the corner of the bag opening towards the outside of the bag body 100 (the direction that causes the protrusion), thereby reducing the protrusion height of the corner of the bag opening. On the one hand, it reduces the resistance during manual or mechanical folding, making the operation smoother. On the other hand, it also makes the bag body 100 flatter after folding.

[0047] Therefore, the three-dimensional bag 10 provided by this utility model can not only effectively enhance the strength of the bag opening, but also cleverly set a guide cut 102 between the first bag opening fold 121 and the second bag opening fold 132, thereby solving the problem of material piling up at the corner of the bag opening during the folding process.

[0048] Furthermore, the presence of a guide cut 102 between the first bag opening fold 121 and the second bag opening fold 132 significantly alters the production process of the stand-up pouch 10. In the prior art, the bag opening folds of the bag body 100 located on the front 120 and the side 130 are often integral structures. When working on the bag opening fold on any one side, the bag opening folds on the adjacent side will be involved. Taking the side 130 as an example, which includes a pair of side split surfaces 131, the substrate is first cut into a predetermined shape by a die-cutting machine. Then, the ends of the substrate that form the front 120 and the side split surfaces 131 are bent to form (bag opening folds). The mold squeezes the part of the substrate that forms the bottom surface 110, so that the pair of front surfaces 120 bend towards the mold. Then, under the pressure of the side sealing component, the side split surfaces 131 on the pair of front surfaces 120 bend towards each other and overlap at the joint. Furthermore, the gripping component on the mold grips the substrate on both sides and moves back and forth in the height direction Z, so that the bag opening folds on the side split surfaces 131 are inserted from the overlapping part. Alternatively, after the bag body 100 is extruded and formed by the mold, a special sealing machine is used to sequentially perform complex processes such as outward folding of the bag opening edge on the side 130, gluing of the bag opening edge on the front 120, hooking up the bag opening edge on the side 130 and folding it inward, and pressing the bag opening edge on the front 120 and folding it inward. This results in a complex production process for the three-dimensional bag 10, affecting its production efficiency. However, the three-dimensional bag 10 provided by this utility model, when the guide cut 102 penetrates the folding section 101 in the height direction Z, can perform operations on the first bag opening edge 121 and the second bag opening edge 132 respectively, such as... Figure 2 As shown, during the production process, the first bag opening edge 121 on the front side 120 of the formed bag body 100 can be folded inward first, and then the second bag opening edge 132 can be folded inward separately. The bending of the two will not affect each other, which greatly simplifies the production process and reduces the design difficulty of the production equipment for the three-dimensional bag 10.

[0049] The extension length of the guide cut 102 of the three-dimensional bag 10 provided in this embodiment will be described in detail below.

[0050] like Figure 3 As shown, in one embodiment, the guide cut 102 extends at least to the middle position of the folded edge 101 in the height direction Z. That is to say, the guide cut 102 may extend to the middle position of the folded edge 101 in the height direction Z, or beyond the middle position of the folded edge 101 in the height direction Z until it penetrates the folded edge 101.

[0051] In one embodiment, the guide cut 102 extends at least beyond the middle position of the folded edge 101 in the height direction Z, but does not penetrate the folded edge 101. A connecting portion 103 is formed on the folded edge 101 above the guide cut 102, connecting the first bag opening fold 121 and the second bag opening fold 132.

[0052] Specifically, the length of the connecting portion 103 on the folded edge bending portion 101 is between 2 and 4 times the thickness of the side wall of the bag body 100. It should be noted that the length of the connecting portion 103 on the folded edge bending portion 101 can be 2, 2.3, 3, 3.6, 4 times, or other multiples within the aforementioned range of the side wall thickness of the bag body 100. Taking a side wall thickness of 0.3 mm as an example, the connecting portion 103 can be 0.6 mm, 0.9 mm, 1 mm, or 1.2 mm. Those skilled in the art can design it according to actual conditions and specific needs; this embodiment does not impose specific limitations on this.

[0053] In this embodiment, the guide cut 102 extends at least to the middle position of the folded edge 101 in the height direction Z, ensuring that the deformation of the first bag opening fold 121 and the second bag opening fold 132 can be well guided. If the extension length of the guide cut 102 is shorter than the length of the folded edge 101 in the height direction Z (for example, less than half the length of the folded edge 101 in the height direction Z), a more obvious material accumulation will form above the folded edge 101.

[0054] Furthermore, the connecting portion 103 formed above the folded edge 101 connects portions of the first bag opening fold 121 and the second bag opening fold 132, preventing the upper edge of the side wall of the bag body 100 from being stretched and torn when a large object is placed into the bag body 100. Simultaneously, the length of the connecting portion 103 on the folded edge 101 is between 2 and 4 times the thickness of the side wall of the bag body 100, forming a continuous first bag opening fold 121 and second bag opening fold 132 on the upper edge of the bag body 100, which also makes the bag body 100 more aesthetically pleasing.

[0055] In another embodiment, such as Figure 4 As shown, the guide cut 102 extends through the entire folded edge bending portion 101 in the height direction Z. This not only improves the problem of material accumulation at the corner of the bag opening when the stand-up pouch 10 is folded, but also allows the first bag opening fold 121 on the front 120 and the second bag opening fold 132 on the side 130 to be bent separately during the production of this stand-up pouch 10. Compared with directly bending the entire bag opening fold, this reduces the difficulty of the processing technology.

[0056] Of course, the specific extension length of the guide incision 102 is not limited to the two embodiments described above. Those skilled in the art can design it according to actual conditions and specific needs.

[0057] The shape and location of the guide incision 102 are described in detail below.

[0058] In this embodiment, as Figure 3 and Figure 4 As shown, the guide cut 102 of this three-dimensional bag 10 is a cut slit 104 extending along the height direction Z. During the production of the three-dimensional bag 10, there is no need to cut the material located between the first bag opening fold 121 and the second bag opening fold 132. After the first bag opening fold 121 is bent and attached to the inner surface of the front 120 and the second bag opening fold 132 is bent and attached to the inner surface of the side 130, the side edges of the first bag opening fold 121 and the second bag opening fold 132 of the three-dimensional bag 10 in the unfolded state fit together tightly, making the appearance of the three-dimensional bag 10 more beautiful and giving it a high-end feel.

[0059] In another embodiment, such as Figures 5-7 As shown, the guide cut 102 of this three-dimensional bag 10 is a guide notch 105 extending along the height direction Z. During the production of the three-dimensional bag 10, the material inside the guide notch 105 needs to be cut. After the first bag opening fold 121 is bent and attached to the inner surface of the front 120 and the second bag opening fold 132 is bent and attached to the inner surface of the side 130, the side edges of the first bag opening fold 121 and the second bag opening fold 132 of the three-dimensional bag 10 are spaced apart. During the folding process, the first bag opening fold 121 and the second bag opening fold 132 will both move toward the guide notch 105 and fill the guide notch 105, making the folded three-dimensional bag 10 flatter.

[0060] Specifically, the guide notch 105 is spaced apart on both sides, and the two sides extend along the height direction Z with their upper ends smoothly transitioning to each other. This disperses the stress concentration on the edge of the guide notch 105, achieving a tear-resistant effect. The portion surrounded by the two sides of the guide notch 105 is the part that needs to be cut.

[0061] Among them, such as Figure 5 As shown, in one embodiment, the guide notch 105 is located at the end of the first bag opening fold 121 in the length direction Y. That is, the side edge of the guide notch 105 on the side of the second bag opening fold 132 is aligned with the bent edge between the side surface 130 and the front surface 120, while the side edge on the side of the first bag opening fold 121 is offset from the bent edge between the side surface 130 and the front surface 120.

[0062] In another embodiment, such as Figure 6As shown, the guide notch 105 is located at the end of the second bag opening fold 132 in the width direction X. That is, the side edge of the guide notch 105 on the side of the first bag opening fold 121 is aligned with the bent edge between the side 130 and the front 120, while the side edge on the side of the second bag opening fold 132 is offset from the bent edge between the side 130 and the front 120.

[0063] Of course, there is another embodiment, such as Figure 7 As shown, a portion of the guide notch 105 is located at the end of the first bag opening fold 121 in the length direction Y, and another portion is located at the end of the second bag opening fold 132 in the width direction X. That is, the edges of the guide notch 105 on both sides are offset from the bent edges between the side 130 and the front 120.

[0064] It should be noted that, as Figures 5-7 As shown, the extension length of the guide notch 105 in the height direction Z can be the same as... Figure 4 Like the cutting slit 104 in the middle, it extends through the folded edge bending portion 101. Of course, the extension length of the guide notch 105 in the height direction Z can also be as... Figure 3 Similar to the cutting seam 104 in the middle, a connecting part 103 is formed at the upper end of the folded and bent part 101.

[0065] More specifically, in the three embodiments described above, the guide notch 105 extends at equal intervals along the height direction Z on both sides. When the bag body 100 is unfolded, the edges of the first bag opening fold 121 and the second bag opening fold 132 fit together seamlessly, resulting in a more aesthetically pleasing appearance.

[0066] Of course, in another alternative embodiment, the two sides of the guide notch 105 extend along the height direction Z from the lower end of the folded edge 101, with the spacing gradually decreasing. Since the upper ends of the first bag opening fold 121 and the second bag opening fold 132 are connected to the corresponding sidewalls of the bag body 100, the lower end of the bag opening fold has a higher degree of freedom during the folding process. Setting a larger spacing at the lower end of the guide notch 105 can better guide the accumulation of sheet material.

[0067] For easy carrying, such as Figure 8 As shown, in one embodiment, the three-dimensional bag 10 further includes a pair of handles 200 disposed at the opening of the bag body 100 and fixed to a pair of front faces 120 respectively. Handle perforations 122 are formed on the first bag opening fold 121 of each front face 120 at positions corresponding to the two ends of the handles 200.

[0068] In this embodiment, the end of each handle 200 extends from the inside of the bag body 100 into the corresponding handle perforation 122, extending between the first bag opening fold 121 and the front surface 120, and is fixedly connected to the inner surface of the first bag opening fold 121 and the inner surface of the front surface 120. Regarding the specific structure of the handle perforation 122, those skilled in the art can design it according to actual conditions and specific needs; this embodiment does not impose specific limitations on it.

[0069] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. In order to provide a deep understanding of this utility model, many specific details are included in the above description, and this utility model may also be implemented without using these details. In addition, in order to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0070] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0071] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0072] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0073] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0074] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A three-dimensional bag, characterized in that, The three-dimensional bag includes a bottom surface located at the bottom of the bag body along its height direction, and a pair of front faces and a pair of side faces standing upright around the bottom surface. The pair of front faces are spaced apart along the width direction of the bag body, and the pair of side faces are respectively connected to the two side edges of the pair of front faces. The pair of front faces, the pair of side faces, and the bottom surface enclose a cavity for placing an object. Each of the front sides has a first pocket opening fold at its upper end, bending towards the inner surface of the corresponding front side; and each of the side sides has a second pocket opening fold at its upper end, bending towards the inner surface of the corresponding side side; and, The first bag opening fold and the second bag opening fold, which are connected to each other, have a guide cut extending along the height direction at the folded portion. The guide cut extends from the lower end of the folded portion toward the bag opening of the three-dimensional bag along the height direction.

2. The three-dimensional bag as described in claim 1, characterized in that, The guide cut extends at least to the middle position of the folded edge in the height direction; and... A connecting portion is formed on the folded edge above the guide cut, connecting the first bag opening fold and the second bag opening fold.

3. The three-dimensional bag as described in claim 2, characterized in that, The length of the connecting part on the folded edge is between 2 and 4 times the thickness of the side wall of the bag body.

4. The three-dimensional bag as described in claim 1, characterized in that, The guide cut extends through the entire folded edge in the height direction.

5. The three-dimensional bag as described in any one of claims 2 to 4, characterized in that, The guide cut is a cut that extends along the height direction.

6. The three-dimensional bag as described in any one of claims 2 to 4, characterized in that, The guide cut is a guide notch extending along the height direction.

7. The three-dimensional bag as described in claim 6, characterized in that, The guide notch is spaced apart on both sides, extends along the height direction, and its upper ends smoothly transition to each other; wherein... The guide notch is located at the end of the first bag opening fold along its length; or, The guide notch is located at the end of the second bag opening fold in the width direction; or, A portion of the guide notch is located at the end of the first bag opening fold in the length direction, and another portion is located at the end of the second bag opening fold in the width direction.

8. The three-dimensional bag as described in claim 7, characterized in that, in, The two sides of the guide notch extend at equal intervals along the height direction; or, The two sides of the guide notch extend along the height direction with the spacing gradually decreasing from the lower end of the folded portion.

9. The three-dimensional bag as described in any one of claims 2 to 4, characterized in that, Each side includes a pair of side facets arranged along the width direction, each side facet being connected to the corresponding front facet, and the ends of the pair of side facets that are close to each other overlapping each other, and the upper end of each side facet forms an extension, the ends of the extensions on the pair of side facets that are close to each other overlapping each other, and bending toward the inside of the bag to form the second bag opening fold.

10. The three-dimensional bag as described in any one of claims 2 to 4, characterized in that, It also includes a pair of handles fixed to the opening of the bag body and respectively to the pair of front sides, wherein handle through holes are formed on the first bag opening fold of each front side at positions corresponding to the two ends of the handles; wherein... Each of the handles extends from the inside of the bag body into the corresponding handle perforation, extends between the first bag opening fold and the front surface, and is fixedly connected to the inner surface of the first bag opening fold and the inner surface of the front surface.

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