Three-dimensional bag

Abstract

The utility model discloses a three-dimensional bag which comprises a bag body with a containing cavity, and the bag body comprises a pair of front faces, a pair of side faces and a bottom face arranged at the bottom of the bag body. The front faces are connected through a pair of side faces, each side face comprises two side split faces, bag opening folded edges are formed on the tops of the two side split faces of the front faces and the tops of the two side split faces of each side face, and the ends, in the thickness direction, of the bag opening folded edges of the two side split faces are fixedly connected in a lap joint mode; moreover, in the height direction of the bag body, an avoiding space is formed in the area where the bag opening folded edges of the two side split faces are in lap joint with each other, after the bag opening folded edges of the two side split faces are in lap joint and fixed with each other, at least part of the top edge of at least one side split face is located in the avoiding space, and the top edges of the two side split faces are aligned with each other in the height direction. Therefore, the top edge of the bag opening folding edge is in more tidy and smooth transition, the attractiveness of the bag opening is improved, and the overall attractiveness of the three-dimensional bag is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of packaging bags, and particularly relates to a three-dimensional bag. Background Art

[0002] A three-dimensional bag is a packaging bag with various shapes and functions, and is 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. Moreover, 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, a three-dimensional bag forming machine is usually used to produce three-dimensional bags. A three-dimensional bag forming machine is a device for producing three-dimensional bags, mainly used for manufacturing various paper bags and non-woven bags, such as environmental protection bags, takeaway bags, wine bags, shoe bags, etc. These machines usually combine optoelectronics, ultrasonic welding technology and PLC control, and can realize automated production, improving production efficiency and product quality.

[0004] However, in the process of making a three-dimensional bag by the three-dimensional bag forming machine in the prior art, it is necessary to form the three-dimensional bag through a forming die. Since there are hemming edges at the bag mouth during the forming process of the three-dimensional bag, and the side surface of the three-dimensional bag usually includes two sub-connection surfaces, and the opposite sides of the two sub-connection surfaces overlap each other to realize the forming of the three-dimensional bag. Due to the existence of the bag mouth hemming edge, after the two sub-connection surfaces overlap each other, one of the sub-connection surfaces will protrude from the other sub-connection surface in the height direction of the three-dimensional bag, thus causing a protrusion at the edge of the bag mouth of the three-dimensional bag, reducing the aesthetics of the three-dimensional bag. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem that there is a protrusion at the edge of the bag mouth of the three-dimensional bag in the prior art, thus reducing the aesthetics of the three-dimensional bag.

[0006] To solve the above problems, the utility model provides a three-dimensional bag, which includes a bag body with an accommodating cavity. The bag body includes a pair of front surfaces oppositely arranged in the thickness direction of the bag body, a pair of side surfaces oppositely arranged 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 mouth is formed by the pair of front surfaces and the pair of side surfaces surrounding at the top of the bag body.

[0007] Wherein, the pair of front surfaces are connected by the pair of side surfaces. Each side surface includes two side sub-surfaces. Hemming edges are formed at the tops of the front surface and the two side sub-surfaces of each side surface, and the end parts of the hemming edges of the two side sub-surfaces overlap and are fixed to each other in the thickness direction.

[0008] Moreover, in the height direction of the bag body, an avoidance space is formed in the area where the bag mouth hems of the two side dividing surfaces overlap each other. After the bag mouth hems of the two side dividing surfaces overlap and fix with each other, at least part of the top edge of at least one side dividing surface is at least partially located in the avoidance space, and the top edges of the two side dividing surfaces are aligned with each other in the height direction.

[0009] With the above technical solution, bag mouth hems are formed at the top of the two side dividing surfaces of the front and each side. This can not only increase the strength and durability of the bag mouth, but also provide additional support for the closure of the bag mouth, and the bag mouth hems can make the edge of the bag mouth neat and smooth, improving the overall aesthetics of the three-dimensional bag.

[0010] Furthermore, an avoidance space is formed in the area where the bag mouth hems of the two side dividing surfaces overlap each other. When the bag mouth hems of the two side dividing surfaces overlap, at least part of the top edge of at least one side dividing surface can be moved into the avoidance space, so that the bag mouth hems of the two side dividing surfaces overlap and fix with each other, making the two side dividing surfaces fix with each other; and by making at least part of the top edge of at least one side dividing surface be at least partially located in the avoidance space, the top edges of the two side dividing surfaces can be aligned with each other in the height direction, making the height of each position of the top edge of the bag mouth hem the same, and then making the top edge of the bag mouth hem transition more neatly and smoothly, not only improving the aesthetics of the bag mouth, but also making the overall aesthetics of the three-dimensional bag higher.

[0011] Furthermore, to prevent the sheet material in the area where the bag mouth hems of the two side dividing surfaces overlap and fix with each other from piling up, in an embodiment of the three-dimensional bag, the avoidance space is set as an avoidance notch opened at the top edge of one of the two side dividing surfaces. When the bag mouth hems of the two side dividing surfaces overlap and fix with each other, the overlapping area of the bag mouth hem of the other side dividing surface of the two side dividing surfaces at least partially surrounds the avoidance notch, so that after the bag mouth hem surrounds the avoidance notch, the thickness of the bag mouth hem in the overlapping area will not become thicker, and thus the bag mouth is flatter.

[0012] Furthermore, to make the connection strength higher after the two side dividing surfaces overlap and fix with each other, in an embodiment of the three-dimensional bag, the avoidance space is an avoidance notch opened at the top edge of one of the two side dividing surfaces. When the bag mouth hems of the two side dividing surfaces overlap and fix with each other, the overlapping area of the bag mouth hem of the other side dividing surface of the two side dividing surfaces at least partially inserts into the avoidance notch along the height direction, so that the overlapping area of the bag mouth hem of the other side dividing surface can be limited by the avoidance notch, further improving the connection strength between the two side dividing surfaces.

[0013] Further, in order to limit the two side dividing surfaces relative to each other, in an embodiment of the three-dimensional bag, the avoidance space includes a first notch formed at the top edge of one of the two side dividing surfaces and a second notch formed at the top edge of the other side dividing surface; and when the bag mouth flanges of the two side dividing surfaces are overlapped and fixed to each other, the overlapping area of the bag mouth flange of one side dividing surface partially surrounds the second notch, and the overlapping area of the bag mouth flange of the other side dividing surface partially inserts into the first notch.

[0014] With the above technical solution, when the bag mouth flanges of the two side dividing surfaces are overlapped and fixed to each other, the overlapping area of the bag mouth flange of one side dividing surface partially surrounds the second notch. In the thickness direction, the two end walls of the second notch can limit the two side edges of the bag mouth flange surrounding the second notch on one side dividing surface; the overlapping area of the bag mouth flange of the other side dividing surface partially inserts into the first notch. In the thickness direction, the two end walls of the first notch can limit the two side edges of the bag mouth flange extending into the first notch on the other side dividing surface; ultimately, the connection strength between the two side dividing surfaces is higher, ensuring the reliability of the use of the three-dimensional bag.

[0015] In an embodiment, the avoidance spaces on the two sides are symmetrically arranged with respect to the midline of the bag body in the width direction; and each avoidance space is symmetrically arranged with respect to the folding line of the bag mouth flange of one side dividing surface.

[0016] With the above technical solution, by setting the avoidance spaces on the two sides to be symmetrically arranged with respect to the midline of the bag body in the width direction, when the pair of side surfaces of the bag body are formed, when the two side dividing surfaces of each side are overlapped with each other, at least part of the top edges of at least one side dividing surface of each side can be located in the avoidance space at the same time, so that the top edges of the two side dividing surfaces corresponding to the pair of side surfaces are aligned with each other in the height direction at the same time, which has the advantage of high forming efficiency.

[0017] In an embodiment, the three-dimensional bag further includes a handle. Two handle perforations are formed at a preset interval distance along the width direction on the bag mouth flange of each front surface. The two ends of the handle pass through the corresponding handle perforations and are fixed to the inner wall surface of the front surface or the bag mouth flange. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural connection diagram of the three-dimensional bag provided by the embodiment of the present invention when it is not completely folded;

[0019] Figure 2 It is a schematic overall structure diagram of the three-dimensional bag provided by the embodiment of the present invention;

[0020] Figure 3Partial schematic diagram of a three-dimensional bag provided by an embodiment of the present utility model before the two side split surfaces are overlapped (excluding the transition part);

[0021] Figure 4 Partial schematic diagram of another embodiment of the three-dimensional bag provided by an embodiment of the present utility model before the two side split surfaces are overlapped (including the transition part);

[0022] Figure 5 For Figure 4 Enlarged view of part A in

[0023] Figure 6 Partial schematic diagram of the three-dimensional bag provided by an embodiment of the present utility model after the two side split surfaces are overlapped;

[0024] Figure 7 Overall structural schematic diagram of the three-dimensional bag provided by an embodiment of the present utility model when provided with a handle;

[0025] Explanation of reference numerals:

[0026] 1. Three-dimensional bag;

[0027] 10. Bag body;

[0028] 11. Front side;

[0029] 12. Side surface;

[0030] 120. Side split surface;

[0031] 13. Bottom surface;

[0032] 14. Bag mouth hem;

[0033] 140. Avoidance space; 141. Avoidance notch; 142. Rectangular part; 143. Transition part;

[0034] 15. Handle. Detailed implementation manners

[0035] As described in the background art, in the process of manufacturing a three-dimensional bag in the prior art, a forming mold is required to form the three-dimensional bag. During the forming process of the three-dimensional bag, since there is a hem at the bag mouth, and the side surface of the three-dimensional bag usually includes two split connecting surfaces, the opposite sides of the two split connecting surfaces overlap each other to realize the forming of the three-dimensional bag. Due to the existence of the bag mouth hem, after the two split connecting surfaces overlap each other, one of the split connecting surfaces will protrude from the other split connecting surface in the height direction of the three-dimensional bag, thus causing a bulge at the edge of the bag mouth of the three-dimensional bag, reducing the aesthetics of the three-dimensional bag.

[0036] To solve the above problems, the present utility model provides a three-dimensional bag. In the height direction of the bag body, an avoidance space is formed in the area where the bag mouth hems of the two side dividing surfaces overlap each other. After the bag mouth hems of the two side dividing surfaces overlap and fix each other, at least part of the top edge of at least one side dividing surface is at least partially located in the avoidance space, and the top edges of the two side dividing surfaces are aligned with each other in the height direction; thus, the top edge of the bag mouth hem is more neatly and smoothly transitioned, which not only improves the aesthetics of the bag mouth, but also makes the overall aesthetics of the three-dimensional bag higher.

[0037] To make the purpose, technical solutions and advantages of the present utility model clearer, the embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings.

[0038] As Figure 1 and Figure 2 shown, first, the overall structure of this three-dimensional bag will be described.

[0039] A three-dimensional bag 1 includes a bag body 10 with an accommodation cavity. The bag body 10 includes a pair of front faces 11 oppositely arranged in the thickness direction W of the bag body 10, a pair of side faces 12 oppositely arranged in the width direction L of the bag body 10, and a bottom face 13 arranged at the bottom of the bag body 10 along the height direction H of the bag body 10. A bag mouth is formed by enclosing the pair of front faces 11 and the pair of side faces 12 at the top of the bag body 10. When loading items with this three-dimensional bag 1, the items can be put into the accommodation cavity through the bag mouth. It should be understood that Figure 1 - Figure 2 the label L in

[0040] is the width direction of the bag body 10, the label W is the thickness direction of the bag body 10, and the label H is the height direction of the bag body 10. Specifically, the pair of front faces 11 are connected by the pair of side faces 12. Each side face 12 includes two side dividing surfaces 120. Bag mouth hems 14 are formed at the tops of the pair of front faces 11 and the two side dividing surfaces 120 of each side face 12. The ends of the bag mouth hems 14 of the two side dividing surfaces 120 overlap and fix each other in the thickness direction W. By providing the bag mouth hems 14, not only can the strength and durability of the bag mouth be increased, but the bag mouth hems 14 can also provide additional support for the closure of the bag mouth, and the bag mouth hems 14 can make the edge of the bag mouth neat and smooth, improving the overall aesthetics of the three-dimensional bag 1. And, since the ends of the bag mouth hems 14 of the two side dividing surfaces 120 overlap and fix each other in the thickness direction W, the connection area between the two side dividing surfaces 120 can be increased, making the connection strength between the two side dividing surfaces 120 higher. It should be understood that the fixing method can be adhesive bonding, heat sealing, etc., and this embodiment does not limit it here.

[0041] More specifically, in the height direction H of the bag body 10, an avoidance space 140 is formed in the region where the bag mouth flanges 14 of the two side dividing surfaces 120 overlap each other. After the bag mouth flanges 14 of the two side dividing surfaces 120 overlap and fix each other, at least a part of the top edge of at least one side dividing surface 120 is at least partially located in the avoidance space 140, and the top edges of the two side dividing surfaces 120 are aligned with each other in the height direction H (as Figure 6 shown); thus, the height of each position of the top edge of the bag mouth flange 14 is the same, and further, the top edge of the bag mouth flange 14 transitions more neatly and smoothly, not only improving the aesthetics of the bag mouth, but also making the overall aesthetics of the three-dimensional bag 1 higher. It should be understood that the avoidance space 140 can be provided on one of the two side dividing surfaces 120 or on both of the two side dividing surfaces 120.

[0042] In summary, the advantages of this three-dimensional bag 1 are as follows: The top of the front surface 11 and the two side dividing surfaces 120 of each side surface 12 are all formed with bag mouth flanges 14. This can not only increase the strength and durability of the bag mouth, but the bag mouth flanges 14 can also provide additional support for the closure of the bag mouth, and the bag mouth flanges 14 can make the edge of the bag mouth neat and smooth, improving the overall aesthetics of the three-dimensional bag 1.

[0043] Furthermore, an avoidance space 140 is formed in the region where the bag mouth flanges 14 of the two side dividing surfaces 120 overlap each other. When the bag mouth flanges 14 of the two side dividing surfaces 120 overlap (as Figure 3 shown), at least a part of the top edge of at least one side dividing surface 120 can be moved into the avoidance space 140 (as Figure 6 shown), so that the bag mouth flanges 14 of the two side dividing surfaces 120 overlap each other, and further, the two side dividing surfaces 120 are fixed to each other; and by making at least a part of the top edge of at least one side dividing surface 120 be at least partially located in the avoidance space 140, the top edges of the two side dividing surfaces 120 can be aligned with each other in the height direction H (as Figure 6 shown), making the height of each position of the top edge of the bag mouth flange 14 the same, and further, the top edge of the bag mouth flange 14 transitions more neatly and smoothly, not only improving the aesthetics of the bag mouth, but also making the overall aesthetics of the three-dimensional bag 1 higher.

[0044] The following explains the method of providing the avoidance space 140 only on one of the two side dividing surfaces 120.

[0045] In one embodiment, as Figure 3 and Figure 6As shown, in order to prevent the sheet material in the overlapping area of the bag mouth hems 14 of the two side dividing surfaces 120 from piling up, the avoidance space 140 is set as an avoidance notch 141 opened at the top edge of one of the two side dividing surfaces 120. When the bag mouth hems 14 of the two side dividing surfaces 120 overlap and are fixed to each other (as Figure 3 shown), one side dividing surface 120 moves in the height direction into the overlapping area of the bag mouth hem 14 of the other side dividing surface 120, so that the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 among the two side dividing surfaces 120 at least partially surrounds the avoidance notch 141 (as Figure 6 shown). As a result, after the bag mouth hem 14 surrounds the avoidance notch 141, the thickness of the bag mouth hem 14 in the overlapping area does not become thicker, and thus the bag mouth is made flatter.

[0046] In another embodiment, in order to make the connection strength higher after the two side dividing surfaces 120 overlap and are fixed to each other, the avoidance space 140 is an avoidance notch 141 opened at the top edge of one of the two side dividing surfaces 120. When the bag mouth hems 14 of the two side dividing surfaces 120 overlap and are fixed to each other, the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 among the two side dividing surfaces 120 at least partially inserts into the avoidance notch 141 in the height direction H. Thus, the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 can be limited by the avoidance notch 141, further enhancing the connection strength between the two side dividing surfaces 120.

[0047] The following explains the specific setting method of setting the avoidance notch 141 on one side dividing surface 120.

[0048] Optionally, in one embodiment, as Figure 3 and Figure 6 shown, the avoidance notch 141 extends inward from the edge of the top edge of one side dividing surface 120 in the thickness direction W; and, when viewed in the width direction L, the avoidance notch 141 includes a rectangular portion 142 with an overall rectangular notch. Thus, when the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 surrounds the avoidance notch 141, the end wall of the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 in the thickness direction W abuts against a side wall of the avoidance notch 141 in the thickness direction W, so that after the two side dividing surfaces 120 overlap, the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 completely surrounds the avoidance notch 141 (as Figure 6 shown), and there is no notch at the top edge of the bag mouth hem 14. As a result, the flatness and integrity of the top edge of the bag mouth hem 14 are ensured, and the overlapping area of the two side dividing surfaces 120 is not easily torn.

[0049] Specifically, the height dimension of the rectangular portion 142 in the height direction H is equal to the material thickness dimension of the bag body 10, so as to ensure that after the two side dividing surfaces 120 overlap each other, there is no height difference in the height direction H, making the top edge of the bag opening smooth. Moreover, the length dimension of the rectangular portion 142 in the thickness direction W is equal to the dimension of the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 in the thickness direction W, so that after the two side dividing surfaces 120 overlap each other, the avoidance notch 141 on one side dividing surface 120 can be completely surrounded by the overlapping area of the bag mouth hem 14 of the other side dividing surface 120, and there is no notch at the top edge of the bag mouth hem 14, further ensuring the flatness of the top edge of the bag mouth hem 14 and enhancing the connection strength between the two side dividing surfaces 120.

[0050] It should be noted that when the opposite ends of the two side dividing surfaces 120 in the thickness direction W need to be fixedly connected to each other, such as by bonding or heat-sealing, since glue needs to be applied or adhesive parts need to be provided between their ends; then the overlapping area of the bag mouth hem of the other side dividing surface 120 only partially surrounds the avoidance notch 141. For example, it can be 3 / 4, 4 / 5, 5 / 6, etc. of the dimension of the overlapping area of the bag mouth hem of the other side dividing surface 120 in the thickness direction W. This embodiment does not make a limitation here.

[0051] Optionally, in another implementable embodiment, as Figure 4 - Figure 6 shown, the avoidance notch 141 extends inward from the edge of the top edge of one side dividing surface 120 in the thickness direction W, and when viewed along the width direction L, the avoidance notch 141 includes a rectangular portion 142 that is integrally rectangular, and the height dimension of the rectangular portion 142 in the height direction H is equal to the material thickness dimension of the bag body 10; thus ensuring that after the two side dividing surfaces 120 overlap each other, there is no height difference in the height direction H, making the top edge of the bag opening aligned, and further ensuring the aesthetics of the three-dimensional bag 1.

[0052] Specifically, the avoidance notch 141 further includes a transition portion 143 (see Figure 5 ), along the thickness direction W, the transition portion 143 is located at the inner end of the rectangular portion 142 and is in through connection with the rectangular portion 142, and gradually decreases from the height dimension of the inner end of the rectangular portion 142 to the top edge of one side dividing surface 120; wherein, the length dimension of the avoidance notch 141 in the thickness direction W is equal to the dimension of the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 in the thickness direction W. Thus, the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 can completely surround the rectangular portion 142 and the transition portion 143. It should be understood that the rectangular portion 142 is opened on one side dividing surface 120 (see Figure 4), the inner end thereof is along the thickness direction W, and is one end close to the front surface 11 connected to one side dividing surface 120.

[0053] More specifically, by providing the transition portion 143, on the one hand, the opening size of the avoidance notch 141 can be increased through the transition portion 143. When the two side dividing surfaces 120 overlap each other, since at least part of the overlapping area of the bag mouth hem of the other side dividing surface 120 needs to surround the avoidance notch 141, it is necessary to move the two side dividing surfaces 120 in the height direction H, or move one of the side dividing surfaces 120, so that the two side dividing surfaces 120 overlap each other (that is, are inserted into each other). By providing the transition portion 143, the opening size of the avoidance notch 141 in the thickness direction can be increased, thereby facilitating positioning. On the other hand, when the two side dividing surfaces 120 overlap each other, when moving the two side dividing surfaces 120 in the height direction H, or moving one of the side dividing surfaces 120 (as Figure 4 shown), the transition portion 143 can guide the other side dividing surface 120 among the two side dividing surfaces 120 to surround the rectangular portion 142, so that the two side dividing surfaces 120 overlap each other and the top edges are aligned (see Figure 6 ), thereby improving the overlapping speed between the two side dividing surfaces 120.

[0054] It should be understood that the included angle range between the bottom wall surface and the side wall surface of the transition portion 143 is 100° to 165°, such as 100°, 115°, 165°, etc., and this embodiment does not limit it here.

[0055] Optionally, in one implementation manner, when viewed along the width direction L, the transition portion 143 is integrally in the shape of a triangle or a fan-shaped notch, and the size of the transition portion 143 in the thickness direction W is equal to 0.5 to 2 times the material thickness size of the bag body 10.

[0056] Specifically, the transition portion 143 is integrally in the shape of a triangle or a fan-shaped notch, so that when the two side dividing surfaces 120 overlap each other, the end portion of the overlapping area of the bag mouth hem 14 of the other side dividing surface 120 can smoothly move into the rectangular portion 142 in the thickness direction W. It should be understood that the material of the bag body 10 can be a non-woven fabric sheet, a paper sheet, etc., and this embodiment does not limit it here.

[0057] It should be noted that the size of the transition portion 143 in the thickness direction W is equal to 0.5 to 2 times the material thickness size of the bag body 10, which can be 0.5 times, 1 time, 2 times, etc. For example, when the material thickness of the bag body 10 is 1 mm, the size of the transition portion 143 in the thickness direction W can be 0.5 mm, 1 mm, 2 mm, etc.

[0058] The following is an explanatory description of when the avoidance space 140 is provided on the two side dividing surfaces 120.

[0059] In one embodiment, the avoidance space 140 includes a first notch (not shown in the figure) opened at the top edge of one of the two side faces 120, and a second notch (not shown in the figure) at the top edge of the other side face 120; and, when the pocket folds 14 of the two side faces 120 are overlapped and fixed to each other, the overlapping area of ​​the pocket fold 14 of one side face 120 partially surrounds the second notch, and in the thickness direction W, the side end walls of the second notch can limit the side edges of the pocket fold 14 on one side face 120 that surrounds the second notch; the overlapping area of ​​the pocket fold 14 of the other side face 120 is partially inserted into the first notch, and in the thickness direction W, the side end walls of the first notch can limit the side edges of the pocket fold 14 on the other side face 120 that extends into the first notch; ultimately, the connection strength between the two side faces 120 is higher, thereby ensuring the reliability of the use of the three-dimensional bag 1.

[0060] Optionally in one embodiment, optionally, in one embodiment, when viewed along the width direction L, the first notch and the second notch are staggered from each other and arranged with their edges aligned; thereby, it is ensured that when the bag opening folded edges 14 on the two side surfaces 120 overlap each other, since the first notch and the second notch are staggered from each other, the first notch and the second notch will not overlap, thereby ensuring the flatness of the top edge of the bag opening and no notch will appear; and, since the first notch and the second notch are arranged with their edges aligned, after the bag opening folded edges 14 on the two side surfaces 120 overlap each other, since the height dimension of one side surface 120 in the second notch is equal to the height dimension of the other side surface 120 in the first notch, thereby ensuring the smoothness of the top edge of the bag opening, making the three-dimensional bag 1 more beautiful.

[0061] Optionally, in a feasible implementation, as Figure 1 As shown, the two side edges of the avoidance space 140 of a pair of side faces 12 are symmetrically arranged relative to the midline of the bag body 10 in the width direction L, so that when the pair of side faces 12 of the bag body 10 are formed, when they are overlapped with each other through their respective two side facets 120, the top edge of at least one side facet 120 of each side face 12 can be synchronously located at least partially in the avoidance space 140, so that the top edges of the two side facets 120 corresponding to each of the pair of side faces 12 are aligned with each other in the height direction H at the same time, which has the advantage of high forming efficiency.

[0062] Optionally, in one embodiment, each avoidance space 140 is symmetrically arranged with respect to the bending line of the mouth hem 14 of a side dividing surface 120, so that the mouth hem 14 of the other side surface 12 can accurately surround the avoidance space 140, and it is avoided that due to the uneven heights of the two side edges of the avoidance space 140 in the width direction L, after the mouth hem 14 of the other side surface 12 surrounds the avoidance space 140, there is a problem of bulging with the mouth edge in the height direction H.

[0063] Furthermore, in an implementable embodiment, for facilitating the extraction of such a handbag, as Figure 7 shown, the three-dimensional bag 1 further includes a handle 15. On the mouth hem 14 of each front surface 11, two handle 15 perforations are formed at preset intervals along the width direction L. The two ends of the handle 15 pass through the corresponding handle 15 perforations and are fixed to the inner wall surface of the front surface 11 or the mouth hem 14; thus, by providing the handle 15, it is convenient to pick up such a handbag. It should be understood that the preset distance can be 5 cm, 10 cm, 13 cm, etc. This embodiment does not make a limitation here, and those skilled in the art can select it according to the size of the front surface 11 of the three-dimensional bag 1 by themselves.

[0064] The above uses specific specific embodiments to illustrate the embodiments of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiments, this does not mean that the features of this invention are limited to this embodiment. On the contrary, the purpose of introducing the invention in conjunction with the embodiment is to cover other alternatives 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 confusing or obscuring the key points of the present invention, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0065] It should be noted that in this specification, similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0066] In the description of this embodiment, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0067] The terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0068] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "connected", "connected to" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this embodiment can be understood according to specific situations.

Claims

1. A three-dimensional bag, characterized in that: The bag body comprises a bag having a cavity, wherein the bag body comprises a pair of front faces arranged oppositely in the thickness direction of the bag body, a pair of side faces arranged oppositely 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 the pair of front faces and the pair of side faces surround the top of the bag body to form a bag opening; wherein, The pair of front faces are connected by the pair of side faces, each of the side faces includes two side facets, the tops of the two side facets of the front face and each of the side faces are formed with pocket folds, and the ends of the pocket folds of the two side facets in the thickness direction are overlapped and fixed to each other; and In the height direction of the bag body, an escape space is formed in the area where the bag opening folded edges of the two side surfaces overlap each other. After the bag opening folded edges of the two side surfaces are overlapped and fixed to each other, the top edge of at least one of the side surfaces is at least partially located in the escape space, and the top edges of the two side surfaces are aligned with each other in the height direction.

2. The three-dimensional bag according to claim 1, characterized in that: The avoidance space is an avoidance gap opened on the top edge of one of the two side surfaces. When the pocket folded edges of the two side surfaces are overlapped and fixed to each other, the overlapping area of ​​the pocket folded edge of the other side surface of the two side surfaces at least partially surrounds the avoidance gap.

3. The three-dimensional bag according to claim 1, characterized in that: The avoidance space is an avoidance notch opened on the top edge of one of the two side surfaces. When the pocket folded edges of the two side surfaces are overlapped and fixed to each other, the overlapping area of ​​the pocket folded edge of the other side surface of the two side surfaces is at least partially inserted into the avoidance notch along the height direction.

4. The three-dimensional bag according to claim 2 or 3, characterized in that: The avoidance notch extends inwardly from the edge of the top edge of the one side face in the thickness direction; and When viewed along the width direction, the avoidance gap includes a rectangular portion which is an overall rectangular gap, the height dimension of the rectangular portion in the height direction is equal to the material thickness dimension of the bag body, and the length dimension of the rectangular portion in the thickness direction is equal to the dimension of the overlapping area of ​​the bag mouth folded edge of the other side surface in the thickness direction.

5. The three-dimensional bag according to claim 2 or 3, characterized in that: The avoidance gap extends inward from the edge of the top edge of the one side face in the thickness direction; and when viewed along the width direction, the avoidance gap includes a rectangular portion that is an overall rectangular gap, and the height dimension of the rectangular portion in the height direction is equal to the material thickness dimension of the bag body; and The avoidance gap also includes a transition portion, which is located at the inner end of the rectangular portion, penetrates and communicates with the rectangular portion, and gradually decreases in height from the inner end of the rectangular portion to the top edge of the one side face; wherein The length dimension of the avoidance gap in the thickness direction is equal to the dimension of the overlapping area of ​​the bag opening fold of the other side surface in the thickness direction.

6. The three-dimensional bag according to claim 5, characterized in that: in When viewed along the width direction, the transition portion is overall in the form of a triangle or fan-shaped notch, and the dimension of the transition portion in the thickness direction is equal to 0.5 to 2 times the material thickness of the bag body.

7. The three-dimensional bag according to claim 1, characterized in that: The avoidance space includes a first notch opened at the top edge of one of the two side faces, and a second notch opened at the top edge of the other side face; and When the pocket folds of the two side surfaces are overlapped and fixed to each other, the overlapping area of ​​the pocket fold of one side surface partially surrounds the second notch, and the overlapping area of ​​the pocket fold of the other side surface is partially inserted into the first notch.

8. The three-dimensional bag according to claim 7, characterized in that: When viewed along the width direction, the first notch and the second notch are staggered and arranged with their edges aligned.

9. The three-dimensional bag according to claim 2, characterized in that: in The avoidance spaces on the two side surfaces are symmetrically arranged relative to the midline of the bag body in the width direction; and The two side edges of each of the avoidance spaces are symmetrically arranged relative to the bending line of the pocket fold of the one side surface.

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

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