Three-dimensional bag

Abstract

According to the three-dimensional bag, the bag opening folding edge is designed on the bag opening of the three-dimensional bag, the strength and durability of the bag opening are enhanced, meanwhile, the attractiveness is improved, the connecting seam extending in the height direction is arranged on the side face of the three-dimensional bag, each side face is composed of the two side split faces, and the two side split faces are at least partially overlapped in the thickness direction of the three-dimensional bag. And the flatness and the consistency of the side surface are ensured. And the first notch part is arranged at the position, close to the connecting seam, of the bag opening folding edge at the top of one side split face, so that the situation that the flatness of the connecting position of the bag opening folding edge is affected due to accumulation of multiple layers of sheet materials is avoided, the visual abrupt feeling is reduced, the first notch part is also beneficial to sleeving of the bag opening folding edge, the sleeving success rate is increased, and the sleeving action stroke is shortened. Due to the design of the three-dimensional bag, the performance and the appearance of the bag opening are improved, the manufacturing process is simpler, and the requirements of more users can be met.

Description

Technical Field

[0001] The present application relates to the field of packaging technology, and in particular to a three-dimensional bag. Background Art

[0002] As a common packaging container, three-dimensional bags are widely used in retail, food, clothing and other industries. Its structure usually includes two front faces, two side faces, a bottom face and a top bag opening. In order to enhance the strength and durability of the bag opening, the edge of the bag opening is usually designed with a bag opening fold that is bent inward. However, there are some technical problems in the treatment of the connection of the bag opening fold in the existing three-dimensional bags, which affects the flatness and aesthetics of the bag opening. For example, in the prior art, the connection of the bag opening fold is usually connected by a simple overlap or gluing method, which is prone to wrinkles or unevenness, affecting the aesthetics and use experience of the bag opening, and may cause the strength of the bag opening fold connection to be insufficient, and it is easy to crack or deform during use, affecting the durability of the three-dimensional bag. It can be seen that when the three-dimensional bag with a bag opening fold is made in the prior art, the treatment method of the bag opening fold connection is not fine enough, which may cause defects in appearance, affect the overall aesthetics and durability of the three-dimensional bag, especially cannot meet the occasions with high requirements for aesthetics such as high-end retail or gift packaging. Utility Model Content

[0003] The purpose of this application is to solve the above-mentioned defects in the prior art and provide a new three-dimensional bag structure design, which can achieve higher flatness and aesthetics at the bag opening folding edge connection, while enhancing the strength of the connection seam, and improving the overall quality of the three-dimensional bag and user experience. Specifically,

[0004] The present application provides a three-dimensional bag, including two front faces arranged oppositely in the thickness direction of the three-dimensional bag, two side faces arranged oppositely in the width direction of the three-dimensional bag, and a bottom face arranged at the bottom of the three-dimensional bag, and a bag opening is formed at the top of the three-dimensional bag; the tops of the front faces and the side faces are both formed with bag opening folding edges, which can not only increase the strength and durability of the bag opening, but also provide additional support for the closure of the bag opening, and the bag opening folding edges can make the bag opening edge more neat and smooth, thereby improving the overall aesthetics of the three-dimensional bag. A connecting seam extending along the height direction of the three-dimensional bag is formed on the side face; 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; this can improve the flatness and consistency of the side facets of the three-dimensional bag, further improving the aesthetics of the three-dimensional bag. The inner wall surface of the edge of one of the two side faces is joined with the outer wall surface of the opposite edge of the other side face to form a connection seam, and a first notch is formed at the position of the bag mouth fold edge at the top of one side face close to the connection seam, so that the first notch can not only be used to avoid part of the sheet material at the bag mouth fold edge connection seam, but also prevent the bag mouth fold edge seam from being piled up due to multiple layers of sheet material, affecting the flatness of the three-dimensional bag bag mouth fold edge connection, thereby reducing the visual abruptness. In addition, the setting of the first notch can also help guide the bag mouth fold edge on the other side face when the bag mouth fold edge is sleeved, thereby improving the success rate of the bag mouth fold edge sleeve connection; and due to the avoidance of the first notch, the action stroke of the bag mouth fold edge sleeve can be shortened during the sleeve connection process, making it easier to manufacture.

[0005] Therefore, the three-dimensional bag provided by the present application, by setting the bag opening hem on the front and side top of the three-dimensional bag, not only significantly improves the strength and durability of the bag opening, but also provides a stable support for the closure of the bag opening. At the same time, the bag opening hem makes the edge of the bag opening more neat and smooth, thereby greatly improving the overall aesthetics of the three-dimensional bag. The first notch is set at the position of the bag opening hem near the connecting seam at the top of one side face, avoiding the problem of multi-layer sheet material accumulation at the bag opening hem connecting seam, thereby ensuring the flatness of the bag opening hem connection and reducing the visual abruptness. The setting of the first notch not only helps to guide the bag opening hem on the other side face when the bag opening hem is sleeved, thereby improving the success rate of the sleeve connection, and also shortens the sleeve connection stroke. When this three-dimensional bag is made, it can achieve a more efficient production of beautiful and strong three-dimensional bags, thereby meeting the needs of more users.

[0006] Furthermore, in the three-dimensional bag provided in the present application, the first notch portion is located at the corner of the bag opening fold edge at the top of one side dividing surface close to the connecting seam, and the depth in the height direction of the three-dimensional bag gradually decreases inward from the side edge of one side dividing surface.

[0007] By adopting the above technical solution and designing the first notch, during the process of sleeve connection of the bag opening fold, the bag opening fold on the other side surface can be gradually inserted into the bag opening fold where the first notch is located along the edge of the first notch, so that it can be more easily connected along the shape of the first notch, and more accurate sleeve positioning is achieved during the process. This not only improves the success rate of sleeve connection, but also shortens the time required for sleeve connection, which is conducive to improving the overall production efficiency of three-dimensional bags.

[0008] Furthermore, in the three-dimensional bag provided in the present application, a corner portion of the bag opening fold on one side surface close to the connecting seam is cut off to form a beveled edge constituting the first notch portion.

[0009] By adopting the above technical solution, the design of the beveled edge allows the bag opening fold to have a natural guiding direction when it is sleeved. Since the beveled edge gradually inclines from the side edge of the side dividing surface toward the connecting seam direction, the bag opening fold on the other side dividing surface can be more easily sleeved along this inclined direction, reducing misalignment and friction during sleeved connection.

[0010] In addition, the removal of the bevel reduces the accumulation of material at the joint of the bag mouth fold, thereby reducing the resistance during the joint. This makes the joint action smoother, reduces the jamming or tearing that may occur during the joint, and improves the success rate and efficiency of the joint. The design of the bevel also has a certain degree of flexibility, which can meet the needs of bag mouth folds and joints of different sizes. By simply adjusting the length and inclination angle of the bevel, the joint process can be optimized to meet the needs of different application scenarios.

[0011] In addition, for the overall structure of the three-dimensional bag, the cutting of the beveled edges avoids the overlap and accumulation of multiple layers of sheet material at the joint, thereby ensuring the flatness after the joint, helping to reduce the overall visual abruptness of the three-dimensional bag and improving the overall aesthetics of the three-dimensional bag.

[0012] Furthermore, in the three-dimensional bag provided in the present application, the inclination angle of the hypotenuse relative to the connecting seam is set to 15° to 75°, and the maximum depth of the first notch portion in the height direction of the three-dimensional bag is set to 30% to 80% of the depth dimension of the bag opening fold in the height direction.

[0013] By adopting the above technical solution, the inclination angle of the hypotenuse is between 15° and 75°, which can provide a suitable guide angle for the connection of the bag mouth fold. For example, if the angle of the hypotenuse is too large (for example, close to 90°), the thickness of the bag mouth connection will become smaller. In this case, it will be difficult for another bag mouth fold to be inserted into the bag mouth fold with the first notch. On the contrary, if the angle of the hypotenuse is too small (for example, close to 0), the function of the first notch will be weakened, and it may not achieve the effect of smoothly connecting the bag mouth fold and improving the flatness of the three-dimensional bag connection seam. The present application sets the inclination angle of the hypotenuse within the range of 15° to 75°. While achieving the flatness of the three-dimensional bag connection seam, it will not be easily misaligned during the connection of the bag mouth fold due to the hypotenuse being too flat, nor will it increase the difficulty of connection due to the hypotenuse being too steep.

[0014] In addition, by setting the maximum depth of the first notch in the height direction of the three-dimensional bag to 30% to 80% of the bag opening folding edge depth, it is possible to ensure the connection strength of the three-dimensional bag opening while avoiding the overlap and accumulation of multiple layers of sheet materials at the sleeve joint, thereby ensuring the flatness after the sleeve joint. For example, an appropriate depth can ensure that the connection seam of the three-dimensional bag after the sleeve joint has sufficient strength, and can avoid cracking or falling off during use.

[0015] Furthermore, in the three-dimensional bag provided in the present application, a second notch portion is formed at a position of the bag opening fold edge at the top of the other side panel close to the connecting seam; when viewed along the width direction of the three-dimensional bag, the first notch portion and the second notch portion are symmetrically shaped relative to the connecting seam, and the ends close to each other overlap.

[0016] By adopting the above technical solution, a second notch portion is formed at a position close to the connecting seam at the bag opening fold edge at the top of the other side surface. The design of the two notches can make the three-dimensional bag more efficient during the production process and improve the flatness of the connecting seam; and the first notch portion and the second notch portion are symmetrical with respect to the connecting seam, which can make the structure of the three-dimensional bag more coordinated and beautiful.

[0017] Furthermore, in the three-dimensional bag provided in the present application, in the thickness direction of the three-dimensional bag, the connecting seam is located in the middle position of the side surface, and an adhesive extension portion is formed at the edge position of the other side surface of the two side surfaces, and the edge position of the inner wall surface of one side surface is bonded to the adhesive extension portion.

[0018] By adopting the above technical solution, by bonding the adhesive extension part to the inner wall of the side dividing surface, not only can the connection seam of the three-dimensional bag be located in the middle of the side when viewed from the outside, but also the three-dimensional bag can form a tighter sealing structure.

[0019] Furthermore, in the three-dimensional bag provided in the present application, the three-dimensional bag also includes a handle, and two handle perforations are formed on the bag opening fold at a preset interval along the width direction of the three-dimensional bag, and the two ends of the handle pass through the corresponding handle perforations and are fixed to the front side or the inner wall surface of the bag opening fold.

[0020] By adopting the above technical solution, by forming a handle perforation on the bag opening fold, when the handle is fixed, its end can pass through the handle perforation and be fixed to the inner wall surface of the three-dimensional bag, for example, it can be fixed to the front side of the three-dimensional bag or the inner wall surface of the bag opening fold. In this way, the fixing position of the handle will not be exposed to the outside, which is beneficial to improving the overall aesthetics of the three-dimensional bag; and the fixing position of the handle will not be interfered by external environmental factors, affecting its connection effect.

[0021] Furthermore, in the three-dimensional bag provided in the present application, in the height direction of the three-dimensional bag, the handle perforation is closer to the crease of the bag opening fold, and the front inner wall surface is fixedly connected with a head card near the top, and the two ends of the handle are fixedly connected to the head card through the corresponding handle perforations.

[0022] By adopting the above technical solution, a head card is fixedly connected to the inner wall surface of the front side of the three-dimensional bag near the top. The head card can not only enhance the bag opening strength of the three-dimensional bag, but also improve the connection strength of the handle by fixing the handle on the head card.

[0023] Furthermore, in the three-dimensional bag provided in the present application, glue is pre-sprayed on the head card, both ends of the handle are bonded and fixed to the head card, and the cross-section of the handle is circular or flat.

[0024] Furthermore, in the three-dimensional bag provided in the present application, a bottom card is provided at the bottom of the three-dimensional bag, and the bottom card is matched with the bottom surface.

[0025] Furthermore, in the three-dimensional bag provided in the present application, a bottom notch is formed at the bottom of the side, and the bottom notch is formed by cutting and removing material from the bottom of the side, and when viewed along the width direction of the three-dimensional bag, the edge of the bottom surface is located in the bottom notch.

[0026] By adopting the above technical solution, a bottom notch is formed at the bottom of the side. The notch can serve as an avoidance space between the bottom of the side and the end of the bottom surface, thereby preventing the bottom of the side from protruding downward from the bottom surface due to factors such as manufacturing errors, resulting in connection misalignment and affecting the appearance; and, when folded, the bottom notch can also avoid the connection between the side and the bottom surface, thereby preventing the three-dimensional bag from bulging due to multi-layer stacking at the connection between the side and the bottom surface, especially when the three-dimensional bag is folded, the bottom notch can avoid the edge of the bottom surface (i.e., the connection position between the bottom surface and the side surface), thereby preventing bulging from affecting the overall aesthetics of the three-dimensional bag.

[0027] Furthermore, in the three-dimensional bag provided in the present application, the bottom of the side surface extends downwardly along the height direction of the three-dimensional bag to form a edging, the edging wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the inner wall surface of the bottom surface; or,

[0028] The bottom of the side surface extends downward along the height direction of the three-dimensional bag to form an edge, the edge wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the outer wall surface of the bottom surface; or,

[0029] The bottom surface extends outwardly in the width direction of the three-dimensional bag to form an edge, the edge wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the outer wall surface of the side surface; or,

[0030] The bottom surface extends outwardly in the width direction of the three-dimensional bag to form an edge, the edge wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the inner wall surface of the side surface.

[0031] By adopting the above technical solution, since the connection between the side surface and the bottom surface is provided with an edge, the edge can strengthen the connection between the side surface and the bottom surface, thereby improving the overall structural strength of the three-dimensional bag.

[0032] Further, in the three-dimensional bag provided in the present application, when the bottom of the side extends downwardly out of the hemming along the height direction of the three-dimensional bag, a first crease line extending along the thickness direction of the three-dimensional bag is formed between the hemming and the bottom of the side, and in the length direction of the three-dimensional bag, the first crease line is located on the side of the bottom edge close to the outside of the three-dimensional bag; or,

[0033] When the bottom surface extends outwardly in the width direction of the three-dimensional bag to form an edge and is fixedly connected to the outer wall surface of the side surface, the connection between the edge and the bottom surface is formed at a second crease line extending in the thickness direction of the three-dimensional bag, and in the width direction of the three-dimensional bag, the second crease line is located on the side of the crease line of the side surface close to the outside of the three-dimensional bag; or,

[0034] When the bottom surface extends outwardly with an edge in the width direction of the three-dimensional bag and is fixedly connected to the inner wall surface of the side, the connection between the edge and the bottom surface is formed at a third crease line extending along the thickness direction of the three-dimensional bag. In the width direction of the three-dimensional bag, the third crease line is located on the side of the crease line of the side close to the inside of the three-dimensional bag.

[0035] By adopting the above technical solution, it can be achieved that the bottom edge of each side surface and the bottom edging are staggered relative to the bottom bending line of the bottom surface in the width direction of the three-dimensional bag; or an edging is formed at the bottom of the side surface, and the bending line of the edging is staggered with the bottom edge in the width direction of the three-dimensional bag. This can avoid the bottom bending line area of ​​the bottom surface from becoming thicker when the three-dimensional bag is folded, and can make the bottom of the folded three-dimensional bag flatter and the overall appearance more beautiful.

[0036] Furthermore, in the three-dimensional bag provided in the present application, the distance between the first crease line and the bottom edge, the distance between the second crease line and the side crease line, and the distance between the third crease line and the side crease line are respectively set to 1 to 2 times the thickness of the sheet.

[0037] By adopting the above technical solution, the offset distance is set to 1 to 2 times the thickness of the sheet material, which can not only ensure the flatness of the bottom of the three-dimensional bag, but also avoid the phenomenon of light leakage due to the large gap at the bottom connection of the three-dimensional bag; for example, if the offset distance is smaller than the thickness of the sheet material, the bottom connection of the three-dimensional bag may still bulge outward, affecting the aesthetics of the three-dimensional bag; if the offset distance is too large, when the side and bottom of the three-dimensional bag are connected, even if the thickness of the glue is considered, it is impossible to make up for the extra gap at the connection between the side and the bottom; at this time, after the side and the bottom are connected, the side will be concave or the edge will be convex, and it may also be that the edge cannot be bent normally according to the bending line or the gap at the connection between the side and the bottom is too large to connect. Therefore, the solution provided by the present application can ensure the structural quality requirements of the three-dimensional bag while ensuring the flatness of the bottom of the three-dimensional bag.

[0038] Furthermore, in the three-dimensional bag provided in the present application, a median crease line extending along the width direction of the three-dimensional bag and a corner crease line extending obliquely relative to the median crease line are formed on the bottom surface; wherein, one end of the corner crease line is connected to the end of the median crease line, and the other end is connected to the corner of the bottom surface; and a bending opening is formed at the connection between the median crease line and the corner crease line; and, when the three-dimensional bag is in a folded state, the bottom surface and the side surfaces are both bent toward the inside of the three-dimensional bag.

[0039] By adopting the above technical solution, corresponding crease lines are formed on the bottom and side surfaces of the three-dimensional bag, so that when the three-dimensional bag is folded, the corresponding side walls can be guided by the crease lines to bend, so that the folding can be achieved more regularly. When the three-dimensional bag is in the folded state, the cross-sectional shape of the bottom and the front along the thickness direction of the three-dimensional bag is in a "W" shape, which not only further improves the regularity of the three-dimensional bag in the folded state, but also has a better stress dispersion effect between the crease lines when bent in this posture. Even if the three-dimensional bag is folded many times and reused, there will be no excessive stress concentration at the crease lines on the side walls of the three-dimensional bag. Therefore, using this design is also helpful in reducing the impact of the crease lines on the overall strength of the three-dimensional bag.

[0040] In addition, a bending opening is formed at the connection between the median crease line and the corner crease line; on the one hand, the bending opening can reduce the abruptness of the bottom folding caused by the accumulation of multiple layers of sheet materials; on the other hand, by designing the bending opening into a specific shape, such as a circle, it is not only beautiful, but the circular bending opening can also disperse the stress of the bottom bending and gathering area, thereby reducing the chance of damage to the area after multiple folds. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic diagram of the three-dimensional structure of a three-dimensional bag provided in an embodiment of the present application;

[0042] Figure 2 A schematic diagram of the partial structure of the side panels and the folded edge of the three-dimensional bag provided in an embodiment of the present application;

[0043] Figure 3 A schematic diagram of a three-dimensional structure in which a second notch is provided at the bag opening fold edge of a three-dimensional bag provided in an embodiment of the present application;

[0044] Figure 4 A schematic diagram of the structure of a three-dimensional bag in an expanded state provided by an embodiment of the present application;

[0045] Figure 5 A schematic diagram of the structure of a three-dimensional bag including a handle provided in an embodiment of the present application;

[0046] Figure 6 The three-dimensional bag provided in the embodiment of the present application includes a schematic diagram of the structure of the head card in the unfolded state;

[0047] Figure 7 A schematic diagram of a structure in which a three-dimensional bag provided in an embodiment of the present application has a bottom notch on the side;

[0048] Figure 8 A schematic diagram of the structure of the connection between the bottom surface and the connection surface of a three-dimensional bag provided in an embodiment of the present application;

[0049] Fig. 9 A schematic diagram of the structure of the connection between the bottom surface and the connection surface of a three-dimensional bag provided in another embodiment of the present application;

[0050] Fig.10 A schematic diagram of the structure of a three-dimensional bag provided in another embodiment of the present application in which a bottom surface and a connecting surface are connected;

[0051] Fig.11 A schematic diagram of the structure of the connection between the bottom surface and the connection surface of a three-dimensional bag provided in another embodiment of the present application;

[0052] Fig.12 This is a schematic diagram of the partial cross-sectional structure of the three-dimensional bag provided in this application in a folded state.

[0053] Description of reference numerals:

[0054] Z, height direction; X, width direction; H, thickness direction;

[0055] 10. Front;

[0056] 20, side surface; 210, side surface; 211, bonding extension portion; 220, connecting seam; 230, bottom notch portion;

[0057] 30, bottom surface; 310, median crease line; 320, corner crease line; 330, bending opening;

[0058] 40. Bag opening fold; 41. First notch; 411. Inclined angle; 412. Maximum depth; 42. Second notch; 43. Handle perforation;

[0059] 50. Handle;

[0060] 60. Head card;

[0061] 70. Hemming; 71. First crease line; 72. Second crease line; 73. Third crease line. DETAILED DESCRIPTION

[0062] A three-dimensional bag is a self-supporting packaging bag, which consists of a bag surface, full or half side pockets, and has a large internal space capacity. It can stand and be placed stably, and is suitable for packaging a variety of products, such as food, cosmetics, daily necessities, etc., and is convenient to carry and display. Three-dimensional bags are made of a variety of materials, including plastic, non-woven fabrics, paper, etc. The appropriate material is selected according to the characteristics and needs of the packaged products. As consumers' requirements for packaging quality increase, three-dimensional bags are increasingly widely used in the market. At the same time, the concept of environmental protection and sustainable development has also prompted companies to use more environmentally friendly and degradable materials to make three-dimensional bags.

[0063] Take a paper three-dimensional bag as an example. Due to the hard and brittle characteristics of the paper material itself, the brittle characteristic makes the edge of the three-dimensional bag easy to be torn. In response to this, various types of paper three-dimensional bags or three-dimensional bags that are easy to be torn are often provided with folds at the bag mouth to strengthen the bag mouth strength of the three-dimensional bag. The fold refers to a part of the sheet material at the three-dimensional bag mouth that is bent toward the inside or outside of the three-dimensional bag to form a flange of a certain width. The hard characteristic of the paper material itself makes the sheet material at the seam position of the three-dimensional bag not easy to deform, especially the connection of the folded edge of the three-dimensional bag bag mouth. Since the sheet material is not easy to deform, it is very easy to cause sheet material accumulation. This will cause the bulging of the bag opening seam, affecting the flatness of the side of the three-dimensional bag, and further affecting the overall aesthetics of the three-dimensional bag. In order to avoid this problem, the existing technology will connect the bag opening folds of the three-dimensional bag to each other, thereby reducing the impact of this factor. However, during the process of setting the bag opening folds, due to the non-deformability of the paper sheet, the two connected folds may collide and block each other, which increases the difficulty of setting. Especially for today's increasingly progressive society, the demand for three-dimensional bags has increased dramatically. If the production efficiency is affected by the difficulty of making three-dimensional bags, it cannot meet today's market demand. In this regard, how to design a three-dimensional bag that is easier to make, more beautiful, and has a better bag quality is a technical problem that needs to be solved in this field.

[0064] To this end, the present application provides a three-dimensional bag, which can be used for packaging of various products, such as food, cosmetics, daily necessities, etc., for easy carrying and display. The material of the three-dimensional bag can include plastic, non-woven fabric, paper, etc. Compared with the three-dimensional bag structure in the prior art, this three-dimensional bag not only has a beautiful appearance and high bag strength, but is also easier to manufacture, and can solve the above-mentioned technical problems existing in the field.

[0065] In order to more clearly introduce the three-dimensional bag provided by the present application, further description is given below in conjunction with the accompanying drawings.

[0066] See also Figure 1 The three-dimensional bag provided in the present application includes two front faces 10, two side faces 20 and a bottom face 30; the two front faces 10 are arranged opposite to each other in the thickness direction H of the three-dimensional bag, and the two side faces 20 are arranged opposite to each other in the width direction X of the three-dimensional bag; the two front faces 10 and the two side faces 20 are arranged in a planar shape, and the two front faces 10 and the two side faces 20 are arranged to surround each other to form a rectangular tubular structure with openings at both ends, and the bottom face 30 is arranged at the bottom of the three-dimensional bag, and is used to block the bottom of the rectangular tubular structure, thereby forming a bag body with an opening at one end and a accommodating space inside, and the open end refers to the bag opening formed at the top of the three-dimensional bag.

[0067] It should be understood that the connection method between the two front faces 10, the two side faces 20 and the bottom face 30 is not limited, and the surfaces can also be independent of each other, and the surfaces can be connected to each other by gluing, heat sealing, etc. to form a bag body. The two front faces 10, the two side faces 20 and the bottom face 30 can also be an integrated structure, that is, the bag body is formed by folding a sheet of material in half; for this solution, the side wall of the bag body (the side wall here refers to the two front faces 10, the two side faces 20 and the bottom face 30) must have a connecting seam 220, and the position of the connecting seam 220 may be located on the front face 10, or on the side face 20, the bottom face 30, etc., and may also be located on two of the surfaces (for example, the connecting seam 220 exists on both the side face 20 and the bottom face 30). The specific surface where the connecting seam 220 is located depends on the shape of the sheet being cut.

[0068] Furthermore, the three-dimensional bag provided in the present application is formed with a bag opening fold 40 at the bag opening, that is, the top of the front side 10 and the side side 20 are both formed with a bag opening fold 40. As mentioned above, the bag opening fold 40 refers to a part of the sheet material at the three-dimensional bag opening that is bent toward the inside or outside of the three-dimensional bag to form a flange of a certain width. Through this design, not only can the strength and durability of the bag opening be increased, but the bag opening fold 40 can also provide additional support for the closure of the bag opening, and the bag opening fold 40 can make the edge of the bag opening more neat and smooth, thereby improving the overall aesthetics of the three-dimensional bag.

[0069] Take the case where the body of a three-dimensional bag is formed by folding a sheet of material in half, and the connecting seam 220 is located on the side 20 of the three-dimensional bag. Specifically, the side 20 is formed with a connecting seam 220 extending along the height direction Z of the three-dimensional bag; each side 20 includes two side faces 210, and the connecting seam 220 is located between the two side faces 210, and the relative edges of the two side faces 210 at least partially overlap in the thickness direction H of the three-dimensional bag; there is no specific requirement for the overlapping size of the two side faces 210, for example, it can be any size between 3mm and 20mm, and this application does not make a sole requirement for this. In this way, the flatness and consistency of the side 20 of the three-dimensional bag can be improved, and the aesthetics of the three-dimensional bag can be further improved.

[0070] Furthermore, the inner wall surface of the edge of one of the two side facets 210 is joined with the outer wall surface of the opposite edge of the other side facet 210 to form a connection seam 220, and a first notch portion 41 is formed at the position of the bag mouth fold 40 at the top of one side facet 210 near the connection seam 220, so that the first notch portion 41 can not only be used to avoid part of the sheet material at the connection seam of the bag mouth fold 40, but also prevent the accumulation of multiple layers of sheet material at the seam of the bag mouth fold 40, affecting the flatness of the connection of the three-dimensional bag bag mouth fold 40, thereby reducing the visual abruptness. In addition, the provision of the first notch portion 41 is also helpful to guide the bag mouth fold 40 on the other side facet 210 when the bag mouth fold 40 is sleeved, thereby improving the success rate of the sleeved bag mouth fold 40; and due to the avoidance of the first notch portion 41, the sleeved action stroke of the bag mouth fold 40 can also be shortened during the sleeved process, making it easier to manufacture.

[0071] Furthermore, a first notch 41 is formed at a position where the pocket fold 40 at the top of one side face 210 is close to the connecting seam 220, and the outer side wall of the other side face 210 is connected to the inner side wall of the edge of one side face 210. In this way, of the two pocket folds 40 at the connecting seam 220, the pocket fold 40 where the first notch 41 is located is located on the outside, and the other pocket fold 40 is sleeved inside the pocket fold 40 where the first notch 41 is located. During the sleeve connection process, the pocket fold 40 can avoid the other pocket fold 40.

[0072] It should be understood that, in the present application, one side dividing surface 210 and the other side dividing surface 210 are only used to more clearly describe the setting method of the two side dividing surfaces 210; that is, in the present application, the first notch portion 41 can be a bag opening fold 40 formed on any one of the two side dividing surfaces 210; for example, the bag opening fold 40 where the first notch portion 41 is located can also be located on the inner side. At this time, the bag opening fold 40 located on the outer side can wrap the first notch portion 41, and the avoidance effect of the bag opening fold 40 action can also be achieved.

[0073] Based on the design of the three-dimensional bag of the above structure of the present application, by setting the bag opening folding edge 40 at the top of the front 10 and the side 20 of the three-dimensional bag, not only the strength and durability of the bag opening are significantly improved, but also a stable support is provided for the closure of the bag opening. At the same time, the bag opening folding edge 40 makes the edge of the bag opening more neat and smooth, thereby greatly improving the overall aesthetics of the three-dimensional bag. The first notch portion 41 is set at the position of the bag opening folding edge 40 near the connecting seam 220 at the top of one side face 210, avoiding the problem of multi-layer sheet material accumulation at the connecting seam of the bag opening folding edge 40, thereby ensuring the flatness of the connection of the bag opening folding edge 40 and reducing the visual abruptness. The setting of the first notch portion 41 not only helps to guide the bag opening folding edge 40 on the other side face 210 when the bag opening folding edge 40 is sleeved, thereby improving the success rate of the sleeve connection and shortening the sleeve connection action stroke. When this three-dimensional bag is made, it can achieve a more efficient production of a beautiful and strong three-dimensional bag, thereby meeting the needs of more users.

[0074] Regarding the specific structure and arrangement of the first notch portion 41 , the first notch portion 41 may specifically be a rectangular notch, a triangular notch, an arc-shaped notch, a straight-line notch, or the like.

[0075] In one embodiment, see Figure 1 and Figure 2 The first notch 41 is located at the corner of the bag opening fold 40 near the connecting seam 220 at the top of one side face 210, and the depth in the height direction Z of the three-dimensional bag gradually decreases from the side edge of one side face 210 to the inside. With this design, during the sleeve connection process of the bag opening fold 40, the bag opening fold 40 on the other side face 210 can be gradually inserted into the bag opening fold 40 where the first notch 41 is located along the edge of the first notch 41, so that it can be more easily connected along the shape of the first notch 41, and more accurate sleeve positioning is achieved during the process. This not only improves the success rate of sleeve connection, but also shortens the time required for sleeve connection, which is conducive to improving the overall production efficiency of the three-dimensional bag.

[0076] Further, see Figure 1 and Figure 2 The corner of the pocket fold 40 on one side face 210 near the connecting seam 220 is cut off to form a beveled edge constituting the first notch portion 41. The design of the beveled edge provides a natural guiding direction for the pocket fold 40 during sleeve connection. Since the beveled edge gradually inclines from the side edge of the side face 210 toward the connecting seam 220, the pocket fold 40 on the other side face 210 can be sleeved more easily along this inclined direction.

[0077] In addition, the removal of the bevel reduces the accumulation of material at the sleeve joint of the bag fold 40, thereby reducing the resistance during the sleeve joint. This makes the sleeve joint action smoother, reduces the jamming or tearing that may occur during the sleeve joint, and improves the success rate and efficiency of the sleeve joint. The design of the bevel also has a certain degree of flexibility, which is suitable for bag folds 40 of different sizes and sleeve joint requirements. By simply adjusting the length and inclination angle of the bevel, the sleeve joint process can be optimized to meet the needs of different application scenarios.

[0078] In addition, for the overall structure of the three-dimensional bag, the cutting of the beveled edges avoids the overlap and accumulation of multiple layers of sheet material at the joint, thereby ensuring the flatness after the joint, helping to reduce the overall visual abruptness of the three-dimensional bag and improving the overall aesthetics of the three-dimensional bag.

[0079] For further information on the design of bevel edges, see Figure 2 , the inclination angle 411 of the hypotenuse relative to the connection seam 220 is set to 15° to 75°, and the maximum depth 412 of the first notch portion 41 in the height direction Z of the three-dimensional bag is set to 30% to 80% of the depth dimension of the bag opening fold 40 in the height direction Z. The inclination angle 411 of the hypotenuse is between 15° and 75°, which can provide a suitable guide angle for the sleeve connection of the bag opening fold 40. For example, if the hypotenuse angle is too large (for example, close to 90°), the size thickness of the bag opening connection will become smaller. In this case, it will be difficult for another bag opening fold 40 to be inserted into the bag opening fold 40 with the first notch portion 41; on the contrary, if the hypotenuse angle is too small (for example, close to 0), the function of the first notch portion 41 will be weakened, and it may not achieve the effect of smoothly sleeve connection of the bag opening fold 40 and improve the flatness of the three-dimensional bag connection seam 220. The present application sets the inclination angle 411 of the hypotenuse within the range of 15° to 75°. While achieving the flatness of the three-dimensional bag connecting seam 220, it will not cause misalignment during the sleeve connection of the bag mouth fold 40 due to the hypotenuse being too flat, nor will it be too steep to increase the difficulty of sleeve connection.

[0080] In addition, by setting the maximum depth 412 of the first notch 41 in the height direction Z of the three-dimensional bag to 30% to 80% of the depth of the bag opening fold 40, it is possible to ensure the connection strength of the three-dimensional bag opening while avoiding the overlap and accumulation of multiple layers of sheet materials at the sleeve joint, thereby ensuring the flatness after the sleeve joint. For example, an appropriate depth can ensure that the connection seam 220 of the three-dimensional bag after the sleeve joint has sufficient strength, and can avoid cracking or falling off during use.

[0081] It should be understood that the angle of the hypotenuse can be set to any angle between 15° and 75°, such as 15°, 50.5°, 75°, etc., and the maximum depth 412 of the first notch portion 41 in the height direction Z of the three-dimensional bag can be set to any dimension between 30% and 80% of the depth dimension of the bag fold edge 40 in the height direction Z, for example, it can be set to 30%, 55.5%, 80%, etc. of the depth dimension of the bag fold edge 40 in the height direction Z.

[0082] Furthermore, in the three-dimensional bag provided in the present application, not only is it limited to that one of the two side faces 210 is provided with a notch, but both side faces 210 may also form a notch.

[0083] Specifically, in the three-dimensional bag provided in this application, see Figure 3 , a second notch 42 is formed at the position of the bag opening fold 40 near the connecting seam 220 at the top of the other side face 210; when viewed along the width direction X of the three-dimensional bag, the first notch 41 and the second notch 42 are symmetrically shaped relative to the connecting seam 220, and the ends close to each other overlap. By forming the second notch 42 at the position of the bag opening fold 40 near the connecting seam 220 at the top of the other side face 210, the design of the two notches can make the three-dimensional bag more efficient during the manufacturing process, and the flatness of the connecting seam 220 is better; and the first notch 41 and the second notch 42 are symmetrically shaped relative to the connecting seam 220, which can make the structure of the three-dimensional bag more coordinated and beautiful.

[0084] It should be understood that the structure and arrangement of the second notch portion 42 are similar to those of the first notch portion 41 . For details, please refer to the structure and arrangement of the first notch portion, which will not be described again here.

[0085] Furthermore, in the three-dimensional bag provided in the present application, when the connecting seam 220 is formed on the side surface 20 , it can be formed at a position close to the edge of the side surface 20 , or it can be formed at a middle position of the side surface 20 .

[0086] In one embodiment, in combination Figure 1 , Figure 3 , Figure 4 In the thickness direction H of the three-dimensional bag, the connecting seam 220 is located in the middle of the side surface 20, and the edge of the other side surface 210 of the two side surfaces 210 is formed with an adhesive extension portion 211 (see Figure 4 ), the edge of the inner wall of one side face 210 is bonded to the bonding extension 211. By bonding the bonding extension 211 to the inner wall of the side face 210, not only can the connection seam 220 of the three-dimensional bag be located in the middle of the side face 20 when viewed from the outside, but also the three-dimensional bag can form a more tightly sealed structure.

[0087] It should be understood that the bonding extension portion 211 refers to the edge portion of the side dividing surface 210, which is equivalent to the extended edge of the side dividing surface 210. The bonding extension portion 211 can be formed on any side dividing surface 210 of the two side dividing surfaces 210, for example, it can be the side dividing surface 210 located on the outside, or it can be the side dividing surface 210 located on the inside. The width of the bonding extension portion 211 is not limited, for example, it can be set to one-fourth, one-fifth, etc. of the width of a side dividing surface 210. The bonding extension portion 211 can be pre-coated with glue, or affixed with double-sided tape, etc.

[0088] Furthermore, in order to facilitate the use of the three-dimensional bag, a component that is easy to take out can be provided on the three-dimensional bag.

[0089] Specifically, in the three-dimensional bag provided in this application, see Figure 5 The three-dimensional bag further includes a handle 50. Two handle perforations 43 are formed on the bag opening fold 40 at a preset interval along the width direction X of the three-dimensional bag. Both ends of the handle 50 pass through the corresponding handle perforations 43 and are fixed to the front 10 or the inner wall surface of the bag opening fold 40. By forming the handle perforations 43 on the bag opening fold 40, when the handle 50 is fixed, its end can pass through the handle perforations 43 and be fixed to the inner wall surface of the three-dimensional bag, for example, it can be fixed to the front 10 of the three-dimensional bag or the inner wall surface of the bag opening fold 40, so that the fixed position of the handle 50 will not be exposed to the outside, which is conducive to improving the overall aesthetics of the three-dimensional bag; and the fixed position of the handle 50 will not be interfered by external environmental factors, affecting its connection effect.

[0090] It should be understood that the distance between the two handle holes 43 is not limited, and can be set to, for example, 5 cm, 10 cm, etc., which should be determined specifically according to the model of the three-dimensional bag.

[0091] Furthermore, in the three-dimensional bag provided in the present application, the shape and arrangement of the handle perforations 43 are not limited. For example, when the handle 50 is circular, the handle perforations 43 can be arranged in a circular shape; when the handle 50 is flat, the handle perforations 43 can be arranged in a flat shape.

[0092] In one embodiment, see Figure 6 In the height direction Z of the three-dimensional bag, the handle perforation 43 is closer to the fold of the bag opening fold 40, and the inner wall surface of the front 10 is fixedly connected with a head clip 60 near the top, and both ends of the handle 50 pass through the corresponding handle perforations 43 and are fixedly connected to the head clip 60. By fixing the head clip 60 at the inner wall surface of the front 10 of the three-dimensional bag near the top, the head clip 60 can not only enhance the bag opening strength of the three-dimensional bag, but also because the handle 50 is fixed to the head clip 60, the connection strength of the handle 50 can also be improved.

[0093] Regarding the setting method of the head card 60, the head card 60 can be connected to the inner wall surface of the front side 10 of the three-dimensional bag before the bag fold edge 40 is folded inward, until the bag fold edge 40 is folded inward, and the free end of the handle 50 is fixedly connected between the head card 60 and the bag fold edge 40.

[0094] Furthermore, in the three-dimensional bag provided in the present application, glue is pre-sprayed on the head card 60, both ends of the handle 50 are bonded and fixed to the head card 60, and the cross-section of the handle 50 is circular or flat.

[0095] Furthermore, in the three-dimensional bag provided in the present application, a bottom card (not shown) is provided at the bottom of the three-dimensional bag, and the bottom card is adapted to the bottom surface 30. The bottom card can be bonded to the bottom surface 30 of the bag body by glue, or can be simply placed on the bottom surface 30, thereby sharing the pressure of the items in the cavity on the bottom surface 30 and improving the carrying capacity of the packaging bag.

[0096] Further, in the three-dimensional bag provided in this application, see Figure 7 , a bottom notch 230 is formed at the bottom of the side 20, and the bottom notch 230 is formed by cutting and removing the material from the bottom of the side 20, and when viewed along the width direction X of the three-dimensional bag, the edge of the bottom surface 30 is located in the bottom notch 230. By forming the bottom notch 230 at the bottom of the side 20, the bottom notch 230 can be used as an escape space between the bottom of the side 20 and the end of the bottom surface 30, so as to avoid the problem that the bottom of the side 20 protrudes downward from the bottom surface 30 due to factors such as manufacturing errors, thereby causing the connection misalignment and affecting the appearance; and when folded, the bottom notch 230 can also avoid the connection between the side 20 and the bottom surface 30, so as to avoid the three-dimensional bag from bulging due to the multi-layer stacking at the connection between the side 20 and the bottom surface 30, especially when the three-dimensional bag is folded, the bottom notch can avoid the edge of the bottom surface 30 (i.e., the connection position between the bottom surface 30 and the side 20), so as to avoid the bulging affecting the overall appearance of the three-dimensional bag. In particular, the bending strength at the connection between the side surface 20 and the bottom surface 30 can be reduced, thereby reducing the probability of the three-dimensional bag being damaged during the folding process due to excessive bending strength at the connection between the side surface 20 and the bottom surface 30 .

[0097] The shape of the bottom notch 230 is not limited, for example, it can be set to an "eight" shape, a "concave" shape, etc.

[0098] Furthermore, in the three-dimensional bag provided in the present application, a edging is provided at the connection between the side surface 20 and the bottom surface 30 , and the edging can strengthen the connection between the side surface 20 and the bottom surface 30 , thereby improving the overall structural strength of the three-dimensional bag.

[0099] The setting method of the hemming is not limited. For example, in one embodiment, see Figure 8, the bottom of the side surface 20 extends a hemming 70 downward along the height direction of the three-dimensional bag (which can be understood as the up and down direction in the figure), and the hemming 70 wraps around the connecting seam 220 between the side surface 20 and the bottom surface 30, and is fixedly connected to the inner wall surface of the bottom surface 30. It should be understood that the hemming 70 is fixedly connected to the inner wall surface of the bottom surface 30 after being bent.

[0100] In another embodiment, see Figure 9, the bottom of the side surface 20 extends downward along the height direction of the three-dimensional bag (which can be understood as the up and down direction in the figure) to form a rim 70, which wraps around the connecting seam 220 between the side surface 20 and the bottom surface 30 and is fixedly connected to the outer wall surface of the bottom surface 30. It should be understood that the rim 70 is fixedly connected to the outer wall surface of the bottom surface 30 after being bent.

[0101] In another embodiment, see 10, the bottom surface 30 extends outwardly in the width direction of the three-dimensional bag (which can be understood as the left-right direction in the figure), and the edge 70 is wrapped around the connecting seam 220 between the side surface 20 and the bottom surface 30, and is fixedly connected to the outer wall surface of the side surface 20. It should be understood that the edge 70 is fixedly connected to the inner wall surface of the side surface 20 after being bent.

[0102] In other embodiments, the bottom surface 30 extends outwardly in the width direction of the three-dimensional bag (which can be understood as the left-right direction in the figure), and the edge 70 is wrapped around the connecting seam 220 between the side surface 20 and the bottom surface 30, and is fixedly connected to the inner wall surface of the side surface 20. The edge 70 is fixedly connected to the outer wall surface of the side surface 20 after being bent.

[0103] Regarding the various configurations of the edging 70 , the edging 70 may be integrated with the side surface 20 or the bottom surface 30 . The edging 70 may also be designed separately from the side surface 20 or the bottom surface 30 and then glued to the corresponding side wall of the three-dimensional bag.

[0104] Further, in the above various embodiments, when the bottom of the side surface 20 extends downwardly out of the edge 70 along the height direction Z of the three-dimensional bag, see Figure 8 Figure and Fig. 9 A first crease line 71 extending along the thickness direction of the three-dimensional bag (which can be understood as the direction perpendicular to the paper surface in the figure) is formed between the edge 70 and the bottom of the side surface 20, and in the width direction of the three-dimensional bag (which can be understood as the left and right direction in the figure), the first crease line 71 is located on the side of the edge of the bottom surface 30 close to the outside of the three-dimensional bag.

[0105] When the bottom surface 30 extends outwardly in the width direction X of the three-dimensional bag to form a rim 70 and is fixedly connected to the outer wall surface of the side surface 20, see Fig.10, the connection between the hem 70 and the bottom surface 30 is formed at a second crease line 72 extending along the thickness direction of the three-dimensional bag (which can be understood as the direction perpendicular to the paper surface in the figure), and in the width direction of the three-dimensional bag (which can be understood as the left and right direction in the figure), the second crease line 72 is located on the side of the crease line of the side surface 20 close to the outside of the three-dimensional bag; or,

[0106] When the bottom surface 30 extends outwardly in the width direction X of the three-dimensional bag to form a rim 70 and is fixedly connected to the inner wall surface of the side surface 20, see Fig.11 The connection between the edge 70 and the bottom surface 30 is formed at a third crease line 73 extending along the thickness direction of the three-dimensional bag (which can be understood as the direction perpendicular to the paper surface in the figure). In the width direction of the three-dimensional bag (which can be understood as the left and right direction in the figure), the third crease line 73 is located on the side of the crease line of the side 20 close to the inside of the three-dimensional bag.

[0107] It should be understood that the first crease line 71, the second crease line 72, and the third crease line 73 can be formed by pressing on the three-dimensional bag sheet in advance.

[0108] In the above-mentioned various embodiments, it is possible to achieve that the bottom edge of each side surface 20 and the bottom edging 70 are staggered relative to the bottom bending line of the bottom surface 30 in the width direction of the three-dimensional bag; or a edging 70 is formed at the bottom of the side surface 20, and the bending line of the edging 70 is staggered with the edge of the bottom surface 30 in the width direction of the three-dimensional bag. This can avoid the bottom bending line portion of the bottom surface 30 from becoming thicker when the three-dimensional bag is folded, and can make the bottom of the folded three-dimensional bag smoother and the overall appearance more beautiful.

[0109] Furthermore, in the three-dimensional bag provided in the present application, the staggered distances of the above-mentioned various embodiments are not limited.

[0110] In one embodiment, the distance between the first crease line 71 and the edge of the bottom surface 30, the distance between the second crease line 72 and the crease line of the side surface 20, and the distance between the third crease line 73 and the crease line of the side surface 20 are respectively set to 1 to 2 times the thickness of the sheet. The staggered distance can be any size between 1 and 2 times the thickness of the sheet.

[0111] In this embodiment, by setting the offset distance to 1 to 2 times the thickness of the sheet material, not only can the flatness of the bottom of the three-dimensional bag be ensured, but also the light leakage caused by the gap at the bottom connection of the three-dimensional bag being too large can be avoided; for example, if the offset distance is smaller than the thickness of the sheet material, the bottom connection of the three-dimensional bag may still bulge outward, affecting the aesthetics of the three-dimensional bag; if the offset distance is too large, when the side 20 of the three-dimensional bag is connected to the bottom 30, even if the thickness of the glue is considered, the extra gap at the connection between the side 20 and the bottom 30 cannot be made up; at this time, after the side 20 and the bottom 30 are connected, the side 20 will be concave or the hemming 70 will be convex, and it may also be that the hemming 70 cannot be bent normally according to the bending line or the gap at the connection between the side 20 and the bottom 30 is too large to be connected. Therefore, the solution provided by the present application can ensure the structural quality requirements of the three-dimensional bag while ensuring the flatness of the bottom of the three-dimensional bag.

[0112] Furthermore, in the three-dimensional bag provided in the present application, crease lines can be provided on the bottom surface 30 and the side surface 20 of the three-dimensional bag to facilitate the folding of the three-dimensional bag. Figure 4 , Figure 6 , Fig.12 A median crease line 310 extending along the width direction X of the three-dimensional bag is formed on the bottom surface 30, and a corner crease line 320 extending obliquely relative to the median crease line 310 is formed on the bottom surface 30; wherein one end of the corner crease line 320 is connected to the end of the median crease line 310, and the other end is connected to the corner of the bottom surface 30; and a bending opening 330 is formed at the connection between the median crease line 310 and the corner crease line 320.

[0113] Specifically, when the three-dimensional bag is folded, the bottom surface 30 and the side surface 20 are both bent toward the inside of the three-dimensional bag. For example, the cross-sectional shape of the bottom surface 30 and the front surface 10 along the thickness direction of the three-dimensional bag is "W" shaped (see Fig.12 ).

[0114] By forming corresponding crease lines on the bottom surface 30 and the side surface 20 of the three-dimensional bag, when the three-dimensional bag is folded, the corresponding side walls can be guided by the crease lines to bend, so that the folding can be achieved more regularly. When the three-dimensional bag is in the folded state, the cross-sectional shape of the bottom surface 30 and the front surface 10 along the thickness direction H of the three-dimensional bag is "W"-shaped, which not only further improves the regularity of the three-dimensional bag in the folded state, but also has a better stress dispersion effect between the crease lines when bent in this posture. Even if the three-dimensional bag is folded many times and reused, the crease lines on the side walls of the three-dimensional bag will not be damaged due to excessive stress concentration. Therefore, using this design is also helpful to reduce the impact of the crease lines on the overall strength of the three-dimensional bag.

[0115] Furthermore, a bending opening 330 is formed at the connection between the median crease line 310 and the corner crease line 320; on the one hand, the bending opening 330 can reduce the abruptness caused by the folding of the bottom surface 30 and the accumulation of multiple layers of sheet materials; on the other hand, by designing the specific shape of the bending opening 330, the shape of the bending opening 330 is not limited, for example, it can be designed to be circular, which is not only beautiful, but the circular bending opening 330 can also disperse the stress of the bending and gathering area of ​​the bottom surface 30, thereby reducing the chance of easy damage to the area after multiple foldings.

[0116] In summary, the three-dimensional bag provided by the present application not only has a beautiful appearance, but also has the advantages of high bag structure strength and easy production.

[0117] It should be noted that, in addition to the implementation methods of the present application described in the above-mentioned specific embodiments, those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Although the description of the present application is introduced in conjunction with the preferred embodiment, this does not mean that the features of this application are limited to the implementation method. On the contrary, the purpose of introducing the application in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the present application. In order to provide an in-depth understanding of the present application, the above description contains many specific details, and the present application may also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present application, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0118] 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.

[0119] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when used. They are only for the convenience of describing the application 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 application.

[0120] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0121] 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.

[0122] Although the present application has been illustrated and described by referring to certain preferred embodiments of the present application, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present application in combination with specific embodiments, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present application.

Claims

1. A three-dimensional bag, characterized in that: The three-dimensional bag comprises two front surfaces arranged opposite to each other in the thickness direction of the three-dimensional bag, two side surfaces arranged opposite to each other in the width direction of the three-dimensional bag, and a bottom surface arranged at the bottom of the three-dimensional bag, and a bag opening is formed at the top of the three-dimensional bag; and The tops of the front side and the side sides are both formed with bag opening folded edges, and the side sides are formed with connecting seams extending in the height direction of the three-dimensional bag; each of the side sides includes two side dividing surfaces, and the relative edges of the two side dividing surfaces at least partially overlap in the thickness direction of the three-dimensional bag; wherein the inner wall surface of the edge of one of the two side dividing surfaces is joined with the outer wall surface of the relative edge of the other side dividing surface to form the connecting seam, and a first notch portion is formed at a position of the bag opening folded edge at the top of one of the side dividing surfaces close to the connecting seam.

2. The three-dimensional bag according to claim 1, characterized in that: The first notch is located at a corner of the bag opening fold at the top of the one side dividing surface close to the connecting seam, and the depth of the first notch in the height direction of the three-dimensional bag gradually decreases inward from the side edge of the one side dividing surface.

3. The three-dimensional bag according to claim 2, characterized in that: The corner of the bag opening fold on the one side surface close to the connecting seam is cut off to form a beveled edge constituting the first notch portion.

4. The three-dimensional bag according to claim 3, characterized in that: The inclination angle of the hypotenuse relative to the connecting seam is set to 15° to 75°, and the maximum depth of the first notch portion in the height direction of the three-dimensional bag is set to 30% to 80% of the depth dimension of the bag opening fold in the height direction.

5. The three-dimensional bag according to claim 1, characterized in that: A second notch is formed at the position of the bag opening fold at the top of the other side surface close to the connecting seam; when viewed along the width direction of the three-dimensional bag, the first notch and the second notch are symmetrically shaped relative to the connecting seam, and the ends close to each other overlap.

6. The three-dimensional bag according to any one of claims 1 to 5, characterized in that: In the thickness direction of the three-dimensional bag, the connecting seam is located in the middle of the side surface, and an adhesive extension portion is formed at the edge of the other side surface of the two side surfaces, and the edge of the inner wall surface of the one side surface is bonded to the adhesive extension portion.

7. The three-dimensional bag according to any one of claims 1 to 5, characterized in that: The three-dimensional bag also includes a handle, and two handle perforations are formed on the bag opening fold at a preset interval along the width direction of the three-dimensional bag, and the two ends of the handle pass through the corresponding handle perforations and are fixed to the front side or the inner wall surface of the bag opening fold.

8. The three-dimensional bag according to claim 7, characterized in that: In the height direction of the three-dimensional bag, the handle perforation is closer to the fold of the bag opening, and a head card is fixedly connected to the inner wall surface of the front side near the top, and the two ends of the handle are fixedly connected to the head card through the corresponding handle perforations.

9. The three-dimensional bag according to claim 8, characterized in that: Glue is sprayed on the head card in advance, and both ends of the handle are bonded and fixed to the head card, and the cross section of the handle is circular or flat.

10. The three-dimensional bag according to any one of claims 1 to 5, characterized in that: A bottom card is arranged at the bottom of the three-dimensional bag, and the bottom card is matched with the bottom surface.

11. The three-dimensional bag according to any one of claims 1 to 5, characterized in that: A bottom notch is formed at the bottom of the side surface, and the bottom notch is formed by cutting and removing material from the bottom of the side surface, and when viewed along the width direction of the three-dimensional bag, the edge of the bottom surface is located in the bottom notch.

12. The three-dimensional bag according to any one of claims 1 to 5, characterized in that: The bottom of the side surface extends downwardly along the height direction of the three-dimensional bag to form an edge, the edge wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the inner wall surface of the bottom surface; or, The bottom of the side surface extends downwardly along the height direction of the three-dimensional bag to form an edge, the edge wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the outer wall surface of the bottom surface; or, The bottom surface extends outwardly in the width direction of the three-dimensional bag to form an edge, the edge wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the outer wall surface of the side surface; or The bottom surface extends outwardly in the width direction of the three-dimensional bag to form an edge, and the edge wraps around the connecting seam between the side surface and the bottom surface, and is fixedly connected to the inner wall surface of the side surface.

13. The three-dimensional bag according to claim 12, characterized in that: When the bottom of the side surface extends downwardly out of the hemming along the height direction of the three-dimensional bag, a first crease line extending along the thickness direction of the three-dimensional bag is formed between the hemming and the bottom of the side surface, and in the length direction of the three-dimensional bag, the first crease line is located on the side of the bottom surface edge close to the outside of the three-dimensional bag; or, When the bottom surface extends outwardly in the width direction of the three-dimensional bag to form an edge and is fixedly connected to the outer wall surface of the side surface, the connection between the edge and the bottom surface is formed at a second crease line extending in the thickness direction of the three-dimensional bag, and in the width direction of the three-dimensional bag, the second crease line is located on the side of the crease line of the side surface close to the outside of the three-dimensional bag; or, When the bottom surface extends outwardly with a edging in the width direction of the three-dimensional bag and is fixedly connected to the inner wall surface of the side surface, the connection between the edging and the bottom surface is formed on a third crease line extending in the thickness direction of the three-dimensional bag. In the width direction of the three-dimensional bag, the third crease line is located on the side of the crease line of the side surface close to the inside of the three-dimensional bag.

14. The three-dimensional bag according to claim 13, characterized in that: The distance between the first crease line and the bottom edge, the distance between the second crease line and the side crease line, and the distance between the third crease line and the side crease line are respectively set to 1 to 2 times the thickness of the sheet material.

15. The three-dimensional bag according to any one of claims 1 to 5, characterized in that: The bottom surface is formed with a median crease line extending along the width direction of the three-dimensional bag and corner crease lines extending obliquely relative to the median crease line; wherein, One end of the corner crease line is connected to the end of the median crease line, and the other end is connected to the corner of the bottom surface; and a bending opening is formed at the connection between the median crease line and the corner crease line; and, When the three-dimensional bag is in a folded state, the bottom surface and the side surfaces are both bent toward the inside of the three-dimensional bag.

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