Three-dimensional bag

Abstract

The three-dimensional bag comprises a bag body, the bag body comprises a pair of front faces oppositely arranged in the thickness direction of the bag body, a pair of side faces oppositely arranged in the width direction of the bag body and a bottom face arranged at the bottom of the bag body in the height direction of the bag body, and a bag opening is formed in the top of the bag body; a plurality of bottom crease lines are formed on the bottom surface, at least two bottom crease lines in the plurality of bottom crease lines intersect and extend with each other, a crease intersection part is formed at the intersection position, and the bottom surface comprises a plurality of crease intersection parts; a bending opening penetrating through the bottom surface is formed in at least one crease crossing part; a buffer area for reducing stress concentration is formed by arranging the bent opening, so that stress is more uniformly distributed around the opening instead of being concentrated at a single intersection point, and the problems that the intersection point protrudes when crease lines intersect and the bottom surface deforms due to uneven stress are solved; therefore, after the three-dimensional bag is folded, the attractiveness of the three-dimensional bag is ensured, and the yield of the three-dimensional bag is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging bags, in particular to a three-dimensional bag. Background Art

[0002] Three-dimensional bags are packaging bags with various shapes and functions, which are widely used in the packaging of various products. For example, three-dimensional bags can be used for food packaging, electronic product packaging, agricultural product packaging, etc. In addition, there are many types of three-dimensional bags, including paper bags, kraft paper bags, non-woven bags, etc.

[0003] In the prior art, when producing three-dimensional bags, three-dimensional bag forming machines are usually used to produce three-dimensional bags. Three-dimensional bag forming machines are equipment used to produce three-dimensional bags, mainly used to manufacture various paper bags and non-woven bags, such as environmentally friendly bags, takeaway bags, wine bags, shoe bags, etc. These machines usually combine optical electronics, ultrasonic welding technology and PLC control, which can realize automated production and improve efficiency and product quality.

[0004] However, in the process of making the three-dimensional bag in the prior art by the three-dimensional bag forming machine, after the three-dimensional bag is formed by the three-dimensional bag forming machine, the three-dimensional bag generally needs to be packaged. During the packaging process, the three-dimensional bag needs to be folded so that the three-dimensional bag occupies less space.

[0005] Specifically, during the gradual folding process of the three-dimensional bag, a plurality of crease lines will be formed on the bottom surface of the three-dimensional bag when folding, and since the side surfaces need to be folded inward when the three-dimensional bag is folded, at least two of the plurality of crease lines will have an intersection at the bottom surface; however, since there will be shear force and compression force on the bottom surface during the folding process, there will be stress concentration at the intersection of the crease lines, resulting in a bulge at the intersection of the crease lines, and due to the stress concentration at the intersection of the crease lines, the position of the crease lines will shift during the formation process, causing deformation of the bottom surface, thereby affecting the aesthetics and yield rate of the three-dimensional bag.

[0006] Therefore, in the prior art, there is a problem that when the three-dimensional bag is gradually folded, stress concentration occurs at the intersection of the crease lines on the bottom surface, causing the intersection of the crease lines to bulge. In addition, due to the stress concentration at the intersection of the crease lines, the position of the crease lines is shifted during the formation process, causing deformation of the bottom surface, thereby affecting the aesthetics and yield rate of the three-dimensional bag. Summary of the invention

[0007] The purpose of the present invention is to solve the problem in the prior art that, during the gradual folding process of the three-dimensional bag, stress concentration occurs at the intersection of the crease lines on the bottom surface, causing the intersection of the crease lines to bulge, and due to the stress concentration at the intersection of the crease lines, the position of the crease lines is shifted during the formation process, causing deformation of the bottom surface, thereby affecting the aesthetics and yield rate of the three-dimensional bag.

[0008] In order to solve the above-mentioned problem, the present invention provides a three-dimensional bag, wherein a plurality of bottom crease lines are formed on the bottom surface, at least two of the plurality of bottom crease lines extend crosswise with each other and form a crease intersection at the intersection position, and the bottom surface includes a plurality of crease intersections; and at least one crease intersection is provided with a bending opening penetrating the bottom surface; thereby, the geometric structure of the intersection is changed by the bending opening, and a bending opening is provided at the original intersection of the bottom crease lines, and the bending opening can make the bottom crease lines no longer directly intersect at one point, thereby dispersing the stress; thereby, the aesthetics of the three-dimensional bag is ensured after folding and the yield rate of the three-dimensional bag is improved.

[0009] The technical solution adopted by the present invention to solve the above-mentioned problem is: a three-dimensional bag, including a bag body, the bag body includes a pair of front faces arranged opposite to each other in the thickness direction of the bag body, a pair of side faces arranged opposite to each other in the width direction of the bag body, and a bottom surface arranged at the bottom of the bag body along the height direction of the bag body, and a bag opening is formed at the top of the bag body.

[0010] Furthermore, a plurality of bottom crease lines are formed on the bottom surface, at least two of the plurality of bottom crease lines cross and extend with each other to form a crease intersection at the intersection position, and the bottom surface includes a plurality of crease intersections; and at least one crease intersection is provided with a bending opening that runs through the bottom surface; on the one hand, the geometric structure of the intersection of the bottom crease lines is changed by the bending opening, and the original intersection of the bottom crease lines is changed into a bending opening, and the bending opening enables the bottom crease lines to no longer directly intersect at one point, thereby dispersing the stress; on the other hand, a buffer area is formed by setting the bending opening to reduce stress concentration, so that the stress is more evenly distributed around the opening, rather than concentrated on a single intersection point, thereby avoiding the problem of the intersection position bulging when the bottom crease lines intersect, and the deformation of the bottom surface due to uneven stress; thereby ensuring the aesthetics of the three-dimensional bag after folding and improving the yield rate of the three-dimensional bag.

[0011] Furthermore, in order to disperse the stress of multiple bottom crease lines at the intersection more evenly, in one embodiment of the three-dimensional bag, the bending opening is provided as a hole opened at the corresponding crease intersection, and the hole is opened at the center position of the crease intersection. Therefore, when multiple bottom crease lines intersect, the stress is distributed more evenly due to the hole at the center position of the crease intersection, thereby reducing the risk of crease line deviation due to uneven stress distribution.

[0012] Furthermore, in order to ensure that the bottom surface of the three-dimensional bag can be accurately folded into a preset shape during the folding process, an embodiment of the three-dimensional bag is configured such that when looking at the bottom surface along the bottom, multiple crease intersections on the bottom surface are symmetrically distributed relative to the center line of the bottom surface in the width direction of the bag body, and at least one pair of bent openings are symmetrically distributed relative to the center line.

[0013] Furthermore, since the side faces need to be folded inward when the bottom surface of the three-dimensional bag is folded, an embodiment of the three-dimensional bag is provided with a pair of front faces connected by a pair of side faces, each side face includes two side facets, and the relative edges of the two side facets at least partially overlap in the thickness direction of the three-dimensional bag, and the two sides of the bottom face are respectively connected to a corresponding side face through a bottom edging; wherein, the overlapping portion of each side face is formed with a side indentation line extending in the height direction of the bag body; the bottom crease lines include a middle part in the thickness direction of the bottom face, a middle bottom crease line extending in the width direction, and two V-shaped crease lines on both sides of the bottom face close to the bottom edging, the inner end of each V-shaped crease line intersects with the middle bottom crease line; and a corresponding bending opening is provided at the crease intersection formed by the intersection of the middle bottom crease line and the inner end of each V-shaped crease line.

[0014] By adopting the above technical solution, the overlapping part of each side is formed with a side indentation line extending along the height direction of the bag body. In the process of packaging the three-dimensional bag, the side can be folded along the side indentation line, avoiding the risk of deformation of the side during the folding process; and, by setting the bottom edging to connect the bottom and the side, the area where the bottom and the side are connected to each other is larger, thereby improving the structural strength of the three-dimensional bag.

[0015] Furthermore, when the three-dimensional bag is folded, it can be gradually folded along the middle bottom crease line, the two V-shaped crease lines, and the side indentation lines. Since the bottom surface is provided with two V-shaped crease lines, the side surface can be folded toward the inside of the three-dimensional bag along the width direction, thereby reducing the storage space of the three-dimensional bag. In addition, when a plurality of folded three-dimensional bags are tied together by straps, the amount of straps used will also be reduced, thereby reducing the packaging cost of the three-dimensional bag.

[0016] Furthermore, in order to ensure the aesthetics of the three-dimensional bag during the forming process, an implementation method of the three-dimensional bag is that bottom edging is provided on both sides of the bottom surface, and the bottom surface is fixedly connected to the inner wall surfaces of the two side surfaces through the bottom edging, and; two first indentation lines extending along the thickness direction are provided near the bottom surface of the bottom edging, and the two first indentation lines are spaced apart in the width direction and parallel to each other.

[0017] Among them, one of the two first indentation lines is located at the connection position between the bottom edge and the bottom surface, and the other first indentation line is located on the bottom edge and close to the bottom surface.

[0018] By adopting the above technical solution, two first indentation lines are set, and when the bottom binding edges set on both sides of the bottom surface are connected with the inner wall surfaces of the two corresponding side facets, the two side facets are staggered in the height direction with the first indentation lines located at the connection position of the bottom binding edge and the bottom surface. After the three-dimensional bag is folded, the first indentation line located at the connection position of the bottom binding edge and the bottom surface is not pasted on the bottom of the two side facets, but is connected to the bottom edges of the two side facets through the first indentation line located on the bottom binding edge, so that the bottom edges of the two side facets will not directly overlap with the first indentation line located at the connection position of the bottom binding edge and the bottom surface, thereby avoiding the problem of bulging in the area at the first indentation line located at the connection position of the bottom binding edge and the bottom surface when the three-dimensional bag is folded. In addition, when the bottom binding edge and the inner wall surfaces of the two side facets are folded and connected, it is easier to achieve smooth folding, and the bottom of the folded three-dimensional bag is flatter, without excess thickness protrusion, and the overall appearance is more beautiful.

[0019] Furthermore, in order to facilitate the connection between the bottom and the side, in one embodiment of the three-dimensional bag, a first avoidance opening is formed on both side edges of the bottom edging; and along the height direction, the first avoidance opening gradually increases from the side edge of the bottom edging close to the bottom surface toward the side edge of the bottom edging away from the bottom surface.

[0020] With the above technical solution, when the bottom hemming arranged on both sides of the bottom surface is connected to the inner wall surfaces of the two corresponding side faces, since the two side faces are not yet connected to each other at this time, the two side faces will protrude from the bottom surface in the width direction, and first avoidance openings are formed on both side edges of the bottom hemming. When the bottom hemming is flipped around the thickness direction, the first avoidance openings can avoid each other with the side faces. When the bottom hemming is flipped to be perpendicular to the bottom surface, the two side faces are flipped around the height direction to approach each other until the edges of the two side faces overlap each other, and at this time, the bottom hemming is fixedly connected to the inner wall surfaces of the two side faces. Therefore, first avoidance openings are formed on both side edges of the bottom hemming, so that the bottom hemming can avoid each other with the two side faces during the folding process, which is convenient for folding.

[0021] Furthermore, in order to facilitate the connection between the two side panels, in one embodiment of the three-dimensional bag, a bag opening fold is formed on the top of the two side panels of the front side and each side, and the bag opening folds of the two side panels are plugged and fixed to each other.

[0022] In addition, a third avoidance opening is formed at the position of the pocket fold edge of the two side dividing surfaces of each side surface near the side indentation line, and along the height direction, the third avoidance opening gradually decreases from the side edge of the pocket fold edge away from the top of the side dividing surface to the side edge of the pocket fold edge close to the top of the side dividing surface.

[0023] By adopting the above technical solution, during the forming process of the three-dimensional bag, when the two side panels are plugged and fixed to each other, the two side panels are flipped around the height direction to approach each other, and then after the two side panels are close to the plug-in position, one of the two side panels only needs to be moved down a small distance in the height direction, and they can be plugged into each other through the third avoidance openings corresponding to each of the two side panels, which has the advantage of convenient plug-in.

[0024] Furthermore, in order to facilitate the subsequent use of the three-dimensional bag, two handle perforations are arranged on the bag opening fold at a predetermined interval in the width direction, and the two ends of the handle pass through the respective corresponding handle perforations and are fixedly connected to the front side and the inner wall surface of the bag opening fold; and in the height direction, the handle perforations are close to the fold of the bag opening fold.

[0025] Furthermore, in order to allow the three-dimensional bag to be closed at its opening during use, in one embodiment of the three-dimensional bag, the three-dimensional bag further comprises at least one buckle fixedly disposed at the folded edge of the bag opening.

[0026] By adopting the above technical solution and providing a buckle, the bag opening of the three-dimensional bag can be closed by the buckle during the use of the three-dimensional bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the structure of a three-dimensional bag provided in an embodiment of the invention in an unfolded state in one implementation manner;

[0028] Figure 2 A schematic diagram of the structure of the three-dimensional bag provided by an embodiment of the present invention after being folded into a three-dimensional shape from a first viewing angle;

[0029] Figure 3 A partial schematic diagram of the bottom surface of an implementation method provided in an embodiment of the present invention;

[0030] Figure 4 A partial schematic diagram of the bottom surface of another implementation manner provided in an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the structure of a three-dimensional bag provided in an embodiment of the invention in an unfolded state in another embodiment;

[0032] Figure 6 A schematic diagram of the structure of a three-dimensional bag provided in an embodiment of the present invention after being folded into a three-dimensional shape in one implementation manner;

[0033] Figure 7 A partial schematic diagram of a three-dimensional bag provided by an embodiment of the present invention, in which the bottom edge is in an unfolded state in one implementation manner;

[0034] Figure 8A schematic diagram of the structure of the three-dimensional bag provided in an embodiment of the present invention after being folded into a three-dimensional shape in another embodiment;

[0035] Fig. 9 A partial schematic diagram of the bottom edge of the three-dimensional bag provided by the embodiment of the present invention in another implementation manner in an unfolded state;

[0036] Fig.10 A schematic diagram of the three-dimensional structure of a three-dimensional bag provided by an embodiment of the present invention when two side faces are misaligned in the height direction in one implementation manner;

[0037] Fig.11 A partial schematic diagram of a third avoidance opening of a three-dimensional bag provided by an embodiment of the present invention in an unfolded state in another implementation manner;

[0038] Fig.12 A schematic diagram of the three-dimensional structure of a three-dimensional bag provided by an embodiment of the present invention before two side surfaces are overlapped in the height direction in one implementation manner;

[0039] Fig.13 A schematic diagram of the three-dimensional structure of a three-dimensional bag provided by an embodiment of the present invention after two side surfaces are overlapped in the height direction in one implementation manner.

[0040] Description of reference numerals:

[0041] 1. Three-dimensional bag;

[0042] 10. Bag body;

[0043] 11. Front;

[0044] 12. Side view;

[0045] 120, side split surface; 121, side indentation line;

[0046] 13. Bottom surface;

[0047] 130, bottom crease line; 131, middle bottom crease line; 132, V-shaped crease line; 133, bent opening; 134, linear opening; 135, circular hole; 136, linear incision;

[0048] 14. Bottom hemming;

[0049] 140, first indentation line; 141, first avoidance opening; 142, second indentation line; 143, second avoidance opening;

[0050] 15. Bag opening;

[0051] 150, bag opening folding edge; 151, bevel edge; 152, third avoidance opening;

[0052] 16. Handle;

[0053] 160, handle perforation; 161, head clip;

[0054] 17. Thickness direction; 18. Width direction; 19. Height direction. DETAILED DESCRIPTION

[0055] In the prior art, after a three-dimensional bag is formed by a three-dimensional bag forming machine, the three-dimensional bag generally needs to be packaged. During the gradual folding process of the three-dimensional bag, a plurality of crease lines will be formed on the bottom surface of the three-dimensional bag when folded, and since the side surfaces need to be folded inward when the three-dimensional bag is folded, at least two of the plurality of crease lines will have an intersection at the bottom surface; however, since there will be shear force and compression force on the bottom surface during the folding process, there will be stress concentration at the intersection of the crease lines, resulting in a bulge at the intersection of the crease lines, and due to the stress concentration at the intersection of the crease lines, the position of the crease lines will shift during the formation process, causing the bottom surface to deform, thereby affecting the aesthetics and yield of the three-dimensional bag.

[0056] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0057] See also Figure 1 and Figure 2 A three-dimensional bag 1 includes a bag body 10, the bag body 10 includes a pair of front faces 11 arranged oppositely in a thickness direction 17 of the bag body 10, a pair of side faces 12 arranged oppositely in a width direction 18 of the bag body 10, and a bottom face 13 arranged at the bottom of the bag body 10 along a height direction 19 of the bag body 10, and the pair of front faces 11 and the pair of side faces 12 surround a bag opening 15 at the top of the bag body 10. Those skilled in the art should understand that the three-dimensional bag 1 disclosed in the present invention can be made of any material such as paper material, plastic, non-woven fabric, for example, it can be a paper bag, a plastic bag, a non-woven fabric bag, etc., and this embodiment does not specifically limit this.

[0058] Specifically, the bottom surface 13 is formed with a plurality of bottom crease lines 130, at least two of the plurality of bottom crease lines 130 cross each other and extend to form a crease intersection at the intersection position, and the bottom surface 13 includes a plurality of crease intersections; and at least one crease intersection is provided with a bending opening 133 that passes through the bottom surface 13. It should be understood that the number of the plurality of bottom crease lines 130 may be 2, 4, 6, etc.; the number of the plurality of crease intersections may be 2, 3, 4, etc.

[0059] More specifically, by providing a bending opening 133, the geometric structure of the intersection of multiple bottom crease lines 130 is changed, and the original intersection of the bottom crease lines 130 is changed into a bending opening 133. The bending opening 133 can prevent the bottom crease lines 130 from directly intersecting at one point, thereby dispersing the stress of the multiple bottom crease lines 130 at the intersection position; on the other hand, by providing the bending opening 133 to form a buffer area, stress concentration is reduced, and the stress is more evenly distributed around the bending opening 133 instead of being concentrated on a single intersection point, thereby avoiding the problem of the intersection position of the bottom crease lines 130 bulging when they intersect, and the position of the bottom crease lines 130 shifting due to uneven stress, thereby causing the bottom surface 13 to deform. Therefore, after the three-dimensional bag 1 is folded, the aesthetics of the three-dimensional bag 1 is guaranteed and the yield rate of the three-dimensional bag 1 is improved.

[0060] It should be understood that stress refers to the compressive force and shear force that the bottom surface 13 is subjected to when the bottom crease line 130 is formed during the folding process. The stress is particularly obvious at the intersection of multiple bottom crease lines 130, and stress concentration may occur.

[0061] Furthermore, the configuration of the bending opening 133 is further explained below.

[0062] Optionally, in one possible implementation, see Figure 1 , in order to disperse the stress of the multiple bottom crease lines 130 at the intersection of the creases as much as possible, so that the bottom surface 13 is not easily deformed; the bending opening 133 is set as a hole opened at the corresponding crease intersection, and the hole is opened at the center of the crease intersection, so as to maximize the length of the multiple bottom crease lines 130 in the hole, so that when the multiple bottom crease lines 130 intersect at the crease intersection, the stress is dispersed as much as possible, and finally when the multiple bottom crease lines 130 intersect at the crease intersection, the intersection position is not easy to bulge, thereby ensuring the aesthetics of the three-dimensional bag 1. It should be understood that the hole can be square, round, etc., and this example is not limited here.

[0063] Optionally, in another practicable implementation, see Figure 3 The bending opening 133 is a linear opening 134 extending from the center position of the crease intersection along at least one bottom crease line 130 forming the crease intersection. The linear opening 134 passes through the bottom surface 13, so that when multiple bottom crease lines 130 intersect at the crease intersection, the intersection point is located in the linear opening 134, and the stress is dispersed, thereby avoiding the problem of deformation of the bottom surface 13 due to excessive stress at the intersection position where multiple bottom crease lines 130 intersect with each other.

[0064] It should be understood that when multiple bottom crease lines 130 intersect at the crease intersection, the linear opening 134 may be opened on one bottom crease line 130, or on both bottom crease lines 130, or on each bottom crease line 130 (see Figure 3 ), this embodiment is not limited here.

[0065] Preferably, in an achievable implementation, see Figure 3 When a plurality of bottom crease lines 130 intersect at the crease intersection, a linear opening is provided on each bottom crease line 130 at the intersection position, so that the stress on each bottom crease line 130 is dispersed as much as possible, thereby avoiding the problem of deformation of the bottom surface 13 due to excessive stress at the intersection position where the plurality of bottom crease lines 130 intersect with each other, thereby ensuring the aesthetics and yield rate of the three-dimensional bag 1.

[0066] Optionally, in one possible implementation, see Figure 5 In order to disperse the stress on the bottom surface 13 as much as possible, when looking at the bottom surface 13 along the bottom, the multiple fold intersections on the bottom surface 13 are symmetrically distributed relative to the center line of the bottom surface 13 in the width direction 18 of the bag body 10, and at least one pair of bending openings 133 symmetrically distributed relative to the center line are opened on the bottom surface 13, so that the bending openings 133 are evenly distributed on the bottom surface 13. In the process of folding the bottom surface 13, when multiple bottom fold lines 130 are formed, the intersection positions of the multiple bottom fold lines 130 on the bottom surface 13 are located in a one-to-one correspondence with the opened bending openings 133, thereby avoiding the stress concentration phenomenon at the intersection positions of the multiple bottom fold lines 130, so that the bottom surface 13 can be folded along the predetermined bottom fold lines 130, thereby ensuring the aesthetics of the three-dimensional bag 1 and the quality after forming. It should be understood that the bending openings 133 can be set as one pair, two pairs, three pairs, etc., and this embodiment is not limited here.

[0067] Furthermore, the structure and arrangement of the three-dimensional bag 1 are further explained below.

[0068] Optionally, in one possible implementation, see Figure 5 and Figure 6A pair of front faces 11 are connected by a pair of side faces 12, each side face 12 includes two side facets 120, and the relative edges of the two side facets 120 at least partially overlap in the thickness direction 17 of the three-dimensional bag 1, and the two sides of the bottom face 13 are respectively connected to a corresponding side face 12 through a bottom edging 14, so that the bag body 10 is formed by surrounding a pair of front faces 11, a pair of side faces 12 and the bottom face 13; and, by setting the bottom edging 14 to connect the bottom face 13 with the side face 12, the area where the bottom face 13 and the side face 12 are connected to each other is larger, thereby improving the structural strength of the three-dimensional bag 1.

[0069] Specifically, when the bag body 10 is formed, the two front faces 11 are folded relative to the bottom face 13 to be parallel in the height direction 19 and opposite in the thickness direction 17, and then the two side faces 120 of each side face 12 are folded so that the relative edges of the two side faces 120 overlap and fix to each other in the thickness direction 17, thereby realizing the forming of the bag body 10. It should be understood that the overlapping fixing method can be bonding, ultrasonic welding, etc. For example, when the three-dimensional bag 1 is a paper bag, it can be fixed by bonding, and when the three-dimensional bag 1 is a non-woven bag, it can be fixed by ultrasonic welding, which is not limited in this embodiment.

[0070] More specifically, the overlapping portion of each side surface 12 is formed with a side indentation line 121 extending along the height direction 19 of the bag body 10. In the process of packaging the three-dimensional bag 1, the side indentation line 121 plays a guiding role when folding the side surface 12, guiding the side surface 12 to bend along the side indentation line 121, thereby avoiding the risk of deformation of the side surface 12 during the folding process.

[0071] More specifically, the bottom crease line 130 includes a middle bottom crease line 131 extending in the width direction 18 in the middle of the bottom surface 13 in the thickness direction 17, and two V-shaped crease lines 132 on both sides of the bottom surface 13 near the bottom edging 14, and the inner end of each V-shaped crease line 132 intersects with the middle bottom crease line 131; when the three-dimensional bag 1 is folded, it can be gradually folded along the middle bottom crease line 131, the two V-shaped crease lines 132, and the side indentation line 121; and since the bottom surface 13 is provided with two V-shaped crease lines 132, the side surface 12 can be folded along the width direction 18 toward the inside of the three-dimensional bag 1, thereby reducing the storage space of the three-dimensional bag 1; for example, when a plurality of folded three-dimensional bags 1 are tied with straps, the amount of straps used will be reduced, thereby reducing the packaging cost of the three-dimensional bag 1.

[0072] More specifically, the crease intersection formed by the intersection of the middle bottom crease line 131 and the inner end of each V-shaped crease line 132 is provided with a corresponding bending opening 133, thereby reducing the stress at the intersection of the middle bottom crease line 131 and the inner end of each V-shaped crease line 132, thereby reducing the risk of deformation of the bottom surface 13 during the folding process of the three-dimensional bag 1.

[0073] Optionally, in one possible implementation, see Figure 1 When a middle bottom crease line 131 is provided on the bottom surface 13, the bending opening 133 can also be provided as a circular hole 135 opened at the center position of the intersection of the creases; thereby, the distance between the middle bottom crease line 131 and each V-shaped crease line 132 in the circular hole 135 is equal, so that the stress at the intersection of the middle bottom crease line 131 and the inner end of each V-shaped crease line 132 is more evenly dispersed, thereby ensuring the reliability of the bottom surface 13 during the folding process, and further reducing the risk of deformation of the bottom surface 13.

[0074] Optionally, in another practicable implementation, see Figure 4 When a middle bottom crease line 131 is provided on the bottom surface 13 , the bending opening 133 may also be provided as a linear cutout 136 extending toward each other along the middle bottom crease line 131 .

[0075] Furthermore, those skilled in the art should understand that when the bending opening 133 is set to different shapes, the opening size should be reasonably designed to avoid excessive damage to the supporting strength of the bottom surface 13. For example, when the bending opening 133 is a circular hole, the radius range of the circular hole 135 is: 3mm~6mm, for example, 3mm, 4.5mm, 6mm, etc., which is not limited to this embodiment.

[0076] Furthermore, a visual window (not shown in the figure) is provided on the front side 11, and the visual window penetrates the front side 11 along the thickness direction 17. By providing the visual window, the items placed in the bag body 10, such as milk tea, fruits, etc., can be displayed for people to identify.

[0077] Optionally, in one embodiment, a visual window is provided on only one of the pair of front faces 11 .

[0078] Optionally, in another embodiment, a visual window may be provided on each of the pair of front surfaces 11 .

[0079] Furthermore, the configuration of the bottom edge 14 is further explained below.

[0080] Optionally, in one possible implementation, see Figure 6 and Figure 7Bottom edging 14 is provided on both sides of the bottom surface 13, and the bottom surface 13 is fixedly connected to the inner wall surfaces of the two side surfaces 120 through the bottom edging 14, so that the area where the bottom surface 13 and each side surface 120 are connected to each other is larger, thereby improving the structural strength of the three-dimensional bag 1.

[0081] Specifically, two first indentation lines 140 extending along the thickness direction 17 are provided at a position near the bottom surface 13 of the bottom edge 14, and the two first indentation lines 140 are spaced apart along the width direction 18 and parallel to each other; wherein, one of the two first indentation lines 140 is located at the connecting position between the bottom edge 14 and the bottom surface 13, and the other first indentation line 140 is located on the bottom edge 14 and close to the bottom surface 13.

[0082] More specifically, by setting two first indentation lines 140, when the bottom edging 14 set on both sides of the bottom surface 13 is connected to the inner wall surfaces of the two corresponding side dividing surfaces 120, the two side dividing surfaces 120 are staggered in the height direction 19 from the first indentation line 140 located at the connection position between the bottom edging 14 and the bottom surface 13; after the three-dimensional bag 1 is folded, the first indentation line 140 located at the connection position between the bottom edging 14 and the bottom surface 13 is not pasted to the bottom of the two side dividing surfaces 120, but is connected to the bottom edges of the two side dividing surfaces 120 through the first indentation line 140 located on the bottom edging 14, so that the bottom edges of the two side dividing surfaces 120 will not directly overlap with the first indentation line 140 located at the connection position between the bottom edging 14 and the bottom surface 13, thereby avoiding the problem of bulging in the area at the first indentation line 140 located at the connection position between the bottom edging 14 and the bottom surface 13 when the three-dimensional bag 1 is folded. Furthermore, when the bottom edging 14 and the inner wall surfaces of the two side faces 120 are folded and connected, it is easier to achieve smooth folding, and the bottom of the folded three-dimensional bag 1 is smoother, without any extra thickness protruding, and the overall appearance is more beautiful.

[0083] Optionally, in this embodiment, see Figure 7 Along the thickness direction 17, first avoidance openings 141 are formed on both side edges of the bottom edge 14; and along the height direction 19, the first avoidance openings 141 gradually increase from one side edge of the bottom edge 14 close to the bottom surface 13 toward one side edge of the bottom edge 14 away from the bottom surface 13.

[0084] Specifically, when the bottom edge 14 disposed on both sides of the bottom surface 13 is connected to the inner wall surfaces of the two corresponding side facets 120, since the two side facets 120 are not yet connected to each other at this time, the two side facets 120 will protrude from the bottom surface 13 in the width direction 18, and first avoidance openings 141 are formed on both side edges of the bottom edge 14. When the bottom edge 14 is turned around the thickness direction 17, the first avoidance openings 141 can avoid each other with the side facets 120. When the bottom edge 14 is turned to be perpendicular to the bottom surface 13, the two side facets 120 are turned around the height direction 19 and approach each other until the edges of the two side facets 120 overlap each other, and at this time, the bottom edge 14 is fixedly connected to the inner wall surfaces of the two side facets 120. Therefore, first avoidance openings 141 are formed on both side edges of the bottom edge 14, so that the bottom edge 14 can avoid each other with the two side facets 120 during the folding process, which is convenient for folding.

[0085] Optionally, in another practicable implementation, see Figure 8 and Fig. 9 Along the height direction 19, the bottoms of the two side surfaces 120 of each side surface 12 are provided with bottom edging 14, and the two side surfaces 120 are fixedly connected to the outer wall surface of the bottom surface 13 through the bottom edging 14, so that the area where the bottom surface 13 and each side surface 120 are connected to each other is larger, thereby improving the structural strength of the three-dimensional bag 1.

[0086] Specifically, on each side dividing surface 120, two second indentation lines 142 extending along the thickness direction 17 are arranged at a position near the side dividing surface 120 on the bottom edge 14, and the two second indentation lines 142 are arranged at intervals along the height direction 19 and are parallel to each other; wherein, one of the two second indentation lines 142 is located at the connecting position between the bottom edge 14 and the side dividing surface 120, and the other second indentation line 142 is located on the bottom edge 14 and close to the edge of the side dividing surface 120.

[0087] More specifically, by setting two second indentation lines 142, when the bottom edging 14 at the bottom of the two side panels 120 of each side surface 12 is connected to the inner wall surface of the corresponding bottom surface 13 connection portion, the bottom surface 13 and the second indentation line 142 located on the bottom edging 14 and close to the edge of the side panel 120 are staggered. After the three-dimensional bag 1 is folded, in the width direction 18, the second indentation line 142 located at the connection position between the bottom edging 14 and the side panel 120 is not adhered to the edge of the bottom surface 13, so that the second indentation line 142 located at the connection position between the bottom edging 14 and the side panel 120 will not directly overlap with the edge of the bottom surface 13. When the three-dimensional bag 1 is folded, the problem of thickening of the area at the second indentation line 142 located at the connection position between the bottom edging 14 and the side panel 120 is avoided. Furthermore, when the bottom edging 14 and the outer wall surface of the bottom surface 13 are folded and connected, it is easier to achieve smooth folding, thereby reducing the thickness after folding. The bottom of the folded three-dimensional bag 1 is smoother, without any extra thickness protruding, and the overall appearance is more beautiful.

[0088] Further, in this embodiment, see Fig. 9 Along the thickness direction 17, a second avoidance opening 143 is formed on the side edge of the bottom edge 14 close to the front surface 11, and along the height direction 19, the second avoidance opening 143 gradually increases from the side edge of the bottom edge 14 close to the side dividing surface 120 toward the side edge of the bottom edge 14 away from the side dividing surface 120.

[0089] Specifically, when the bottom edge 14 at the bottom of the two side faces 120 of each side surface 12 is connected to the inner wall surface of the corresponding connection part of the bottom face 13, since the two side faces 120 are not yet connected to each other at this time, the two side faces 120 will protrude downward from the bottom face 13 in the height direction 19, and a second avoidance opening 143 is set at the side edge of the bottom edge 14 close to the front face 11. Now the bottom edge 14 is turned around the width direction to be parallel to the bottom face, and then the two side faces 120 are turned around the height direction 19 and approach each other, and the front face 11 can be avoided through the second avoidance opening 143 until the edges of the two side faces 120 overlap each other, and then the bottom edge 14 is folded around the width direction 18 and fixedly connected to the outer wall surface of the bottom face 13. Therefore, the second avoidance opening 143 is formed on both side edges of the bottom edge 14, so that the bottom edge 14 can avoid each other with the bottom face 13 during the folding process of the two side faces 120, which is convenient for folding.

[0090] Furthermore, the configuration of the bag opening 15 is further explained below.

[0091] Optionally, in one possible implementation, see Figure 10-13A pocket folding edge 150 is formed at the top of the front face 11 and the two side faces 120 of each side face 12. The pocket folding edges 150 of the two side faces 120 are plugged and fixed to each other, so that the contact area between the two side faces 120 is larger, which not only enhances the connection strength between the two side faces 120, but also enhances the strength of the pocket 15, thereby increasing the durability of the pocket 15. The pocket folding edge 150 can also provide additional support for the closure of the pocket 15, and the pocket folding edge 150 can make the pocket edge more neat and smooth, thereby improving the overall aesthetics of the three-dimensional bag 1.

[0092] Specifically, the third avoidance opening 152 is formed at the position of the pocket fold 150 of the two side facets 120 of each side face 12 near the side indentation line 121, and along the height direction 19, the third avoidance opening 152 gradually decreases from the side edge of the pocket fold 150 away from the top of the side facet 120 to the side edge of the pocket fold 150 close to the top of the side facet 120. Therefore, when the two side facets 120 are plugged and fixed, the third avoidance opening 152 is used to avoid part of the sheet material at the connection position of the pocket fold 150 on the two side facets 120, thereby preventing the pocket fold 150 on the two side facets 120 from being affected in terms of flatness due to the accumulation of multiple layers of sheet material when the pocket fold 150 is plugged into each other, thereby reducing the visual abruptness and making the three-dimensional bag 1 more beautiful as a whole.

[0093] More specifically, during the forming process of the three-dimensional bag 1, when the two side faces 120 are plugged and fixed to each other, the two side faces 120 are flipped around the height direction 19 to approach each other, and then after the two side faces 120 are close to the plugging position, one of the two side faces 120 is only moved down a small distance in the height direction 19 (see Fig.12 ), the two side faces 120 can be plugged into each other through the third avoidance openings 152 corresponding to each other (see Fig.13 ), which has the advantage of easy plugging.

[0094] Optionally, in a feasible implementation, the pocket folding edges 150 on the two side surfaces 120 are formed with beveled edges 151 near the side indentation lines 121, and the beveled edges 151 extend obliquely upward from the edges of the corresponding side surfaces 120 along the thickness direction 17, and the space between the beveled edges 151 and the top edge of the pocket 15 constitutes a third avoidance opening 152, and the beveled edges 151 of one of the two side surfaces 120 are at least partially plugged into the beveled edges 151 of the other side surface 120, so that the positions of the pocket folding edges 150 on the two side surfaces 120 at least partially overlap with each other, thereby further improving the connection strength of the two side surfaces 120.

[0095] For details, see Figure 12 to Figure 13During the action process, the design of the bevel 151 allows the pocket folds 150 on the two side faces 120 to have a natural guiding direction when they are plugged into each other, so that when the pocket folds 150 on the two side faces 120 are plugged into each other, one side face 120 does not move, and the other side face 120 moves down along the height direction 19, and then moves up, it is guided by the bevel 151 of the stationary side face 120, thereby ensuring the reliability of the plug-in.

[0096] It should be understood that the angle of inclination of the bevel 151 in the thickness direction 17 is between 30° and 60°, for example, it can be 30°, 35°, 40°, 45°, 60° or any other angle within the above angle range. It should be noted that if the angle of inclination of the bevel 151 in the thickness direction 17 exceeds 60°, the overlapping and plugging parts of the two pocket folds 150 are small, and the effect of reinforcing the connection strength cannot be played. If the angle of inclination of the bevel 151 in the thickness direction 17 is less than 30°, the pocket folds 150 of the two side faces 120 still need to be staggered with a large height difference in the height direction 19 during the plug-in process, and the difficulty of the plug-in operation cannot be simplified.

[0097] Optionally, in one practicable implementation, see Figure 5 To facilitate taking the three-dimensional bag 1, the three-dimensional bag 1 also includes a handle 16. Two handle perforations 160 are arranged on the bag opening fold 150 at a predetermined interval along the width direction 18. The two ends of the handle 16 pass through the respective corresponding handle perforations 160 and are fixedly connected to the front side 11 and the inner wall surface of the bag opening fold 150; and in the height direction 19, the handle perforations 160 are close to the fold of the bag opening fold 150. When the three-dimensional bag 1 is used later, the three-dimensional bag 1 can be used by grasping the handle 16.

[0098] Optionally, in an achievable implementation, a head card 161 is fixedly connected to the inner wall surface of the front surface 11 near the top (see Figure 5 ), the two ends of the handle 16 pass through the corresponding handle perforations 160 and are fixed between the head card 161 and the inner wall surface of the bag fold 150, thereby enhancing the connection strength between the handle 16 and the bag body 10 and ensuring the reliability of the use of the three-dimensional bag 1; and / or a bottom card is also provided in the three-dimensional bag 1, and the bottom card is provided at the bottom of the three-dimensional bag 1 and is adapted to the shape of the bottom surface 13. By providing the bottom card on the bottom surface 13, the support strength of the bottom surface 13 can be increased, thereby improving the load-bearing capacity of the three-dimensional bag 1. It should be understood that only the head card 161 can be provided on the three-dimensional bag 1, or only the bottom card can be provided on the three-dimensional bag 1; or, the head card 161 and the bottom card can be provided on the three-dimensional bag 1 at the same time.

[0099] Optionally, in another feasible embodiment, a header card 161 may be fixedly connected to the inner wall surface of the front side 11 near the top, and both ends of the handle 16 pass through their respective corresponding handle perforations 160 and are fixed between the header card 161 and the inner wall surface of the bag opening fold 150, which also has the effect of enhancing the connection strength between the handle 16 and the bag body 10.

[0100] Optionally, in an achievable implementation, the three-dimensional bag 1 further includes at least one buckle (not shown in the figure) fixedly disposed at the bag opening fold 150, and during the use of the three-dimensional bag 1, the bag opening 15 of the three-dimensional bag 1 can be closed by the buckle. It should be understood that the number of buckles can be 2, 4, 5, etc., and this embodiment is not limited here.

[0101] Optionally, in one embodiment, a head clip 161 is provided between the inner wall surface of the front face 11 and the inner wall surface of the bag opening fold 150 at the installation position of each buckle and the bag opening fold 150, and the head clip 161 is fixedly connected to the inner wall surface of the front face 11 and the inner wall surface of the bag opening fold 150. By providing a head clip 161 at the installation position of each buckle and the bag opening fold 150, the connection strength between the buckle and the bag opening fold 150 can be higher when the buckle is installed on the bag opening fold 150.

[0102] Optionally, in another embodiment, a decorative piece is fixedly provided on the outer wall of the front 11 at the installation position of each buckle and the bag opening fold 150, and the decorative piece covers the installation position of the buckle and the bag opening fold 150. By covering the installation position of the buckle and the bag opening fold 150 with the decorative piece, the three-dimensional bag 1 can be made more beautiful. It should be understood that the decorative piece can be a bow, a paper-cut card, etc., which is not limited in this embodiment.

[0103] In summary, the advantages of the three-dimensional bag 1 provided by the present invention are as follows: by setting a bending opening 133 at the intersection of multiple bottom crease lines 130 on the bottom surface 13, the geometric structure of the intersection of the multiple bottom crease lines 130 is changed, and the original intersection of the bottom crease lines 130 is changed into a bending opening 133. The bending opening 133 can make the bottom crease lines 130 no longer directly intersect at one point, thereby dispersing the stress of the multiple bottom crease lines 130 at the intersection; on the other hand, by setting the bending opening 133 to form a buffer area to reduce stress concentration, the stress will be more evenly distributed around the bending opening 133 instead of being concentrated on a single intersection, thereby avoiding the problem of the intersection position bulging when the bottom crease lines 130 intersect, and the position of the bottom crease lines 130 being offset due to uneven stress, thereby causing the bottom surface 13 to deform, thereby ensuring the aesthetics of the three-dimensional bag 1 after the three-dimensional bag 1 is folded and improving the yield of the three-dimensional bag 1.

[0104] Furthermore, when the bottom edge 14 is provided on both sides of the bottom surface 13, two first indentation lines 140 extending along the thickness direction 17 are provided at the position of the bottom edge 14 close to the bottom surface 13, so that the bottom edge 14 and the inner wall surfaces of the two side facets 120 can be folded more smoothly when being folded and connected, and the bottom of the three-dimensional bag 1 after folding is more smooth, without any extra thickness protruding, and the overall appearance is more beautiful. Alternatively, when the bottom of the two side facets 120 of each side surface 12 is provided with the bottom edge 14, two second indentation lines 142 extending along the thickness direction 17 are provided at the position of the bottom edge 14 close to the side facet 120, so that the bottom edge 14 and the outer wall surface of the bottom surface 13 can be folded more smoothly when being folded and connected, and the thickness after folding is reduced, making the overall appearance of the three-dimensional bag 1 more beautiful.

[0105] Furthermore, a third avoidance opening 152 is formed at a position of the bag opening fold 150 of the two side surfaces 120 of each side surface 12 near the side indentation line 121. During the molding process of the three-dimensional bag 1, when the two side surfaces 120 are plugged and fixed to each other, the two side surfaces 120 are flipped around the height direction 19 to approach each other. Then, after the two side surfaces 120 are close to the plug-in position, one of the two side surfaces 120 only needs to be moved downward a small distance in the height direction 19, and the two side surfaces 120 can be plugged into each other through the third avoidance opening 152 corresponding to each other, which has the advantage of convenient plug-in.

[0106] The above is an explanation of the implementation mode of the present invention by specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation mode. On the contrary, the purpose of introducing the invention in conjunction with the implementation mode is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide a deep understanding of the present invention, many specific details will be included in the above description. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the key points of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0107] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0108] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0109] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0110] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

Claims

1. A three-dimensional bag, characterized in that: The bag body comprises a pair of front faces arranged opposite to each other in the thickness direction of the bag body, a pair of side faces arranged opposite to each other in the width direction of the bag body, and a bottom face arranged at the bottom of the bag body along the height direction of the bag body, and a bag opening is formed at the top of the bag body; wherein, The bottom surface is formed with a plurality of bottom crease lines, at least two of the plurality of bottom crease lines extend crosswise with each other and form a crease intersection at the intersection position, and the bottom surface includes a plurality of the crease intersections; and at least one of the crease intersections is provided with a bending opening that passes through the bottom surface.

2. The three-dimensional bag according to claim 1, characterized in that: The bending opening is a hole opened at the corresponding intersection of the folds, and the hole is opened at the center position of the intersection of the folds.

3. The three-dimensional bag according to claim 1, characterized in that: The bending opening is a linear opening extending from the center position of the fold intersection along at least one fold line forming the fold intersection, and the linear opening passes through the bottom surface.

4. The three-dimensional bag according to any one of claims 1 to 3, characterized in that: When looking toward the bottom surface along the bottom, the multiple fold intersections on the bottom surface are symmetrically distributed relative to the center line of the bottom surface in the width direction of the bag body, and at least one pair of bent openings symmetrically distributed relative to the center line is provided.

5. The three-dimensional bag according to claim 4, characterized in that: The pair of front faces are connected by the pair of side faces, each of the side faces includes two side facets, the opposite edges of the two side facets at least partially overlap in the thickness direction of the three-dimensional bag, and the two sides of the bottom face are respectively connected to a corresponding one of the side faces through the bottom hemming; wherein, The overlapping portion of each side surface is formed with a side indentation line extending along the height direction of the bag body; The bottom crease line includes a middle part of the bottom surface in the thickness direction, a middle bottom crease line extending in the width direction, and two V-shaped crease lines on both sides of the bottom surface close to the bottom hem, and the inner end of each V-shaped crease line intersects with the middle bottom crease line; and The fold intersection formed by the intersection of the middle bottom fold line and the inner end of each V-shaped fold line is provided with the corresponding bending opening.

6. The three-dimensional bag according to claim 5, characterized in that: The bending opening is a circular hole opened at the center of the intersection of the folds; or, The bending openings are linear cuts extending toward each other along the middle bottom crease line.

7. The three-dimensional bag according to claim 5, characterized in that: The bottom edge is provided on both sides of the bottom surface, and the bottom surface is fixedly connected to the inner wall surfaces of the two side surfaces through the bottom edge, and; the bottom edge is provided with two first indentation lines extending along the thickness direction at a position close to the bottom surface, and the two first indentation lines are arranged at intervals along the width direction and are parallel to each other; wherein, One of the two first indentation lines is located at a connection position between the bottom edge and the bottom surface, and the other first indentation line is located on the bottom edge and close to the bottom surface.

8. The three-dimensional bag according to claim 7, characterized in that: Along the thickness direction, both side edges of the bottom edging are formed with a first avoidance opening; and along the height direction, the first avoidance opening gradually increases from the side edge of the bottom edging close to the bottom surface toward the side edge of the bottom edging away from the bottom surface.

9. The three-dimensional bag according to claim 5, characterized in that: Along the height direction, the bottom of the two side facets of each of the side faces is provided with the bottom edging, and the two side facets are fixedly connected to the outer wall of the bottom face through the bottom edging, and on each of the side facets, two second indentation lines extending along the thickness direction are provided at a position of the bottom edging close to the side facet, and the two second indentation lines are spaced apart along the height direction and are parallel to each other; wherein, One of the two second indentation lines is located at the connection position between the bottom edge and the side surface, and the other second indentation line is located on the bottom edge and close to the edge of the side surface.

10. The three-dimensional bag according to claim 9, characterized in that: Along the thickness direction, a second avoidance opening is formed at the side edge of the bottom edge close to the front surface, and along the height direction, the second avoidance opening gradually increases from the side edge of the bottom edge close to the side dividing surface toward the side edge of the bottom edge away from the side dividing surface.

11. The three-dimensional bag according to claim 5, characterized in that: The tops of the two side surfaces of the front surface and each of the side surfaces are formed with pocket folds, and the pocket folds of the two side surfaces are plugged and fixed to each other; and A third avoidance opening is formed at the position of the pocket fold edge of the two side dividing surfaces of each side surface close to the side indentation line, and along the height direction, the third avoidance opening gradually decreases from the side edge of the pocket fold edge away from the top of the side dividing surface to the side edge of the pocket fold edge close to the top of the side dividing surface.

12. The three-dimensional bag according to claim 11, characterized in that: The bag opening folding edges on the two side surfaces are formed with beveled edges near the side indentation lines, and the beveled edges extend obliquely upward from the edges of the corresponding side surfaces along the thickness direction, and the space between the beveled edges and the top edge of the bag opening constitutes the third avoidance opening, and the beveled edges of one of the two side surfaces are at least partially plugged into the beveled edges of the other side surfaces.

13. The three-dimensional bag according to claim 11, characterized in that: The three-dimensional bag further comprises a handle, and two handle perforations are arranged on the bag opening fold at a predetermined interval along the width direction, and both ends of the handle pass through the respective corresponding handle perforations and are fixedly connected to the front surface and the inner wall surface of the bag opening fold; and In the height direction, the handle perforation is close to the fold of the bag opening fold.

14. The three-dimensional bag according to claim 13, characterized in that: A header clip is fixedly connected to the inner wall surface of the front side near the top, and both ends of the handle pass through the corresponding handle holes and are fixed between the header clip and the inner wall surface of the bag opening fold, or between the header clip and the inner wall surface of the front side; and / or A bottom card is also arranged in the three-dimensional bag. The bottom card is arranged at the bottom of the three-dimensional bag and is adapted to the shape of the bottom surface.

15. The three-dimensional bag according to claim 14, characterized in that: The three-dimensional bag also includes at least one buckle fixedly arranged at the folded edge of the bag opening.

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