Three-dimensional bag

Abstract

The utility model provides a three-dimensional bag which comprises a bag body with a containing cavity, the bag body comprises a pair of front faces arranged at intervals in the width direction of the bag body, a bottom face far away from one side of a bag opening in the height direction of the bag body, and a pair of side faces connected with the pair of front faces and the bottom face in the length direction of the bag body. The two sides, in the length direction, of the bottom face are connected with the corresponding side faces through bottom face connecting parts, receding notches are formed in the corners, in the areas where the bottom face connecting parts are located, of the bag body, and the receding notches are jointly defined by the bent edges of the bag body and the sheet material edges in the areas where the bottom face connecting parts are located. According to the three-dimensional bag, the stress distribution during bending of the bag corner materials is changed by arranging the avoiding notches, a deformation space is provided for bending of the bag corner materials, and the technical problems that when a traditional three-dimensional bag is folded, the bag corners are stacked and protrude, and the flatness is poor are solved.

Description

Technical Field

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

[0002] As a common packaging container, the three-dimensional bag is widely used in industries such as retail, food, and clothing. Its structure usually includes a pair of front faces, a pair of side faces, and a bottom face. Generally, the pair of front faces of the three-dimensional bag are connected to the bottom face, and the pair of side faces are connected to the bottom face through a connecting structure, so that the pair of front faces, the pair of side faces, and the bottom face jointly enclose a cavity for accommodating articles.

[0003] Common three-dimensional bags not only require a sufficiently large accommodating cavity, but also should be foldable for easy storage and handling when the three-dimensional bag is not filled with articles. In the prior art, by folding the pair of side faces of the three-dimensional bag, the bottom face is folded inwards, and the pair of front faces are attached to each other. Since the side faces are connected to the bottom face through a connecting structure, and both the side faces and the bottom face will be bent and deformed during the folding process, this results in obvious extrusion at the connection between the side faces and the bottom face, especially at the bag corners. The multi-layer materials (bottom face, side faces, and connecting structure) are severely piled up. On the one hand, it will cause a great hindrance to the folding of the bag body; on the other hand, the folded three-dimensional bag will bulge at the bag corners due to the piled materials, affecting the flatness of the folded three-dimensional bag. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the technical problem in the prior art that both the side faces and the bottom face of the three-dimensional bag are bent and deformed during the folding process, which results in obvious extrusion at the connection between the side faces and the bottom face, especially at the bag corners. The multi-layer materials (bottom face, side faces, and connecting structure) are severely piled up. On the one hand, it will cause a great hindrance to the folding of the bag body; on the other hand, the folded three-dimensional bag will bulge at the bag corners due to the piled materials, affecting the flatness of the folded three-dimensional bag.

[0005] To solve the above technical problem, an embodiment of the utility model discloses a three-dimensional bag, which solves the technical problems of material piling and bulging at the bag corners and poor flatness during the folding of the traditional three-dimensional bag. Specifically, such a three-dimensional bag includes a bag body with an accommodating cavity. The bag body includes a pair of front faces arranged at intervals along the width direction of the bag body, a bottom face on the side far from the bag mouth in the height direction of the bag body, and a pair of side faces respectively connecting the pair of front faces and the bottom face in the length direction of the bag body. The two sides of the bottom face in the length direction are connected to the corresponding side faces through bottom connecting parts.

[0006] Wherein, an avoidance notch is formed at each corner of the bag body in the area where the bottom connecting part is located. The avoidance notch is jointly surrounded by the bent edge of the bag body and the sheet material edge in the area where the bottom connecting part is located.

[0007] With the above technical solution, the setting of the avoidance notch changes the force distribution when the bag corner material is bent. When a traditional three-dimensional bag is folded, the connection part (bag corner) between the bottom surface and the side surface forms material accumulation due to the superposition of multiple layers of materials (bottom surface + side surface + bottom surface connection part), resulting in local stress concentration. This avoidance notch removes some materials, reducing the number of material layers in the bending area and dispersing the stress along the notch edge to avoid local overextrusion.

[0008] Moreover, the avoidance notch provides a deformation space for the bending of the bag corner material. When the bag body is folded, originally multiple layers of materials need to be compressed at the bag corner part. The existence of the avoidance notch enables the materials to displace towards the direction of the avoidance notch, reducing the stacking of materials at the bag corner part towards the outside (the direction causing protrusion), thereby reducing the protrusion height of the bag corner. On the one hand, it reduces the resistance during manual or mechanical folding, making the operation smoother. On the other hand, it also makes the bag body flatter after folding.

[0009] Furthermore, since the bottom surface needs to be folded inwards when the bag body is folded, forming multiple complex extending crease lines on the bottom surface, in order to reduce the resistance suffered by the inward folding of the bottom surface, an embodiment of the present utility model also provides a three-dimensional bag, and the bottom surface connection part is arranged as follows: at the end of the bottom surface in the length direction, a bottom surface extension part is extended, and each bottom surface extension part is bent and extends into the inner side of the corresponding side surface and is fixedly connected to the inner surface of the side surface.

[0010] Among them, when viewed along the length direction of the bag body, the avoidance notch is higher than the bottom surface, and the lower end of the avoidance notch is flush with the bottom surface.

[0011] With the above technical solution, the bottom surface is connected to the bottom surface extension part, and the bottom surface extension part extends into the inner side of the side surface and is fixed. Without increasing the thickness of the bottom surface, the connection between the bottom surface and the side surface is realized. Moreover, since there are no multiple layers of stacked materials on the bottom surface, the bottom surface is flatter. On the one hand, it helps the three-dimensional bag to stand upright supported by the bottom surface. On the other hand, it enables items to be placed stably on the bottom surface.

[0012] Moreover, since the bottom surface is the main part of the three-dimensional bag for carrying items, when designing the position of the avoidance notch, the avoidance notch is made higher than the bottom surface, and the lower end of the avoidance notch is flush with the bottom surface, that is, the avoidance notch is not opened on the bottom surface, ensuring the structural integrity of the bottom surface and enabling the three-dimensional bag to simultaneously take into account high load-bearing strength and folding convenience.

[0013] Even further, an embodiment of the present utility model also provides a three-dimensional bag. When viewed along the length direction of the bag body, the extension line of the side where the extension part of each bottom surface extension part extends in the width direction passes through the corner end point where the front surface intersects the bottom surface.

[0014] Moreover, the outer end points of the lateral bottom edge of the side surface are located on the front side edge of the front surface and at a position spaced from the bottom surface, and the lateral bottom edge of the side surface and the edge of the bottom surface jointly enclose an avoidance notch.

[0015] With the above technical solution, since the extension line where the side edge of the extension part in the width direction of the bottom surface extension part passes through the corner end point where the front surface intersects the bottom surface, and the outer end points of the lateral bottom edge of the side surface are located on the front side edge of the front surface and at a position spaced from the bottom surface, it is ensured that the avoidance notch is higher than the bottom surface in the height direction and will not affect the strength of the bottom surface of the bag body.

[0016] Furthermore, in order to reduce the influence of the avoidance notch on the sealing performance of the accommodation cavity inside the bag body, an embodiment of the present utility model also provides a three-dimensional bag, and a transition part is further provided between the extension part side edge and the lateral bottom edge.

[0017] Moreover, when viewed along the length direction of the bag body, at least a part of the transition part is located inside the avoidance notch.

[0018] With the above technical solution, the transition part makes the connection between the extension part side edge and the lateral bottom edge smoother, avoiding the formation of sharp edges or gaps at the bending part, thereby reducing the leakage risk and improving the sealing performance inside the three-dimensional bag. Secondly, the transition part is located inside the avoidance notch, which can support or fill the material of the bag body and prevent the material from being damaged due to extrusion during the folding process.

[0019] In one embodiment, the transition part extends from the extension part side edge towards the lateral bottom edge.

[0020] Moreover, when viewed along the length direction of the bag body, the side edge of the transition part away from the lateral bottom edge extends in the height direction.

[0021] In another alternative embodiment, the transition part extends from the front side edge towards the side surface.

[0022] Moreover, when viewed along the length direction of the bag body, the transition part is bent and attached to the inner wall of the side surface, and the side edge of the transition part away from the front side edge extends in the height direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the three-dimensional bag provided by the embodiment of the present utility model;

[0024] Figure 2 is a schematic structural diagram of the two split side surfaces of the three-dimensional bag provided by the embodiment of the present utility model when unfolded;

[0025] Figure 3 is a partial schematic diagram of the connection part between the side surface (the middle part of the lateral bottom edge extends parallel to the plane where the bottom surface is located) and the bottom surface when viewed along the length direction of the bag body;

[0026] Figure 4 A partial schematic view showing that, when viewed along the length direction of the bag body, the side surface (the middle part of the bottom side of the side surface extends parallel to the plane where the bottom surface is located), the bottom surface connecting part, and the transition part extend from the side edge of the extending part towards the bottom side of the side surface;

[0027] Figure 5 A partial schematic view showing that, when viewed along the length direction of the bag body, the side surface (the middle part of the bottom side of the side surface extends obliquely with respect to the plane where the bottom surface is located), the bottom surface connecting part, and the transition part extend from the side edge of the extending part towards the bottom side of the side surface;

[0028] Figure 6 A partial schematic view showing a pair of split side surfaces unfolded, and the transition part extends from the side edge of the extending part towards the bottom side of the side surface;

[0029] Figure 7 A partial schematic view showing that, when viewed along the length direction of the bag body, the side surface (the middle part of the bottom side of the side surface extends parallel to the plane where the bottom surface is located), the bottom surface connecting part, and the transition part extend from the front side edge towards the side surface;

[0030] Figure 8 A partial schematic view showing a pair of split side surfaces unfolded, and the transition part extends from the front side edge towards the side surface;

[0031] Figure 9 A structural schematic view of a three-dimensional bag (with a handle provided) according to an embodiment of the present utility model.

[0032] Explanation of reference numerals:

[0033] 10. Three-dimensional bag;

[0034] 100. Bag body; 101. Avoidance notch; 102. Bag mouth bending part; 103. Cut;

[0035] 110. Front surface; 111. Front side edge; 120. Bottom surface; 130. Side surface; 131. Split side surface; 132. Bottom side of the side surface; 140. Bottom surface connecting part; 141. Bottom surface extending part; 142. Side edge of the extending part; 150. Transition part; 151. Side edge of the transition part;

[0036] 200. Handle. Detailed implementation manners

[0037] In the prior art, due to the connection structure between the side surface and the bottom surface of the three-dimensional bag, when the three-dimensional bag is folded, the multi-layer materials (bottom surface, side surface, and connection structure) at the connection between the side surface and the bottom surface are severely piled up, which not only causes a great hindrance to the folding of the bag body; moreover, the folded three-dimensional bag will bulge at the bag corners due to the piled materials, affecting the flatness of the folded three-dimensional bag.

[0038] To this end, the present utility model provides a three-dimensional bag. The side surface and the bottom surface of this three-dimensional bag are connected together through a bottom connection part. Moreover, an avoidance notch is formed at each corner of the bag body in the area where the bottom connection part is located. The avoidance notch is jointly surrounded by the bent edge of the bag body and the sheet material edge in the area where the bottom connection part is located. By setting the avoidance notch, this three-dimensional bag changes the force distribution when the bag corner material is bent, provides a deformation space for the bending of the bag corner material, and solves the technical problems of material piling and bulging at the bag corners and poor flatness when the traditional three-dimensional bag is folded.

[0039] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will further describe the embodiments of the present utility model in detail with reference to the accompanying drawings.

[0040] As Figure 1 shown, this three-dimensional bag 10 includes a bag body 100 having an accommodation cavity. In the accompanying drawings of the specification, X refers to the width direction of the bag body 100, Y refers to the length direction of the bag body 100, and Z refers to the height direction of the bag body 100.

[0041] The bag body 100 includes a pair of front surfaces 110 arranged at intervals along the width direction X of the bag body 100, a bottom surface 120 on the side away from the bag opening in the height direction Z of the bag body 100, and a pair of side surfaces 130 respectively connecting the pair of front surfaces 110 and the bottom surface 120 in the width direction X of the bag body 100. The two sides of the bottom surface 120 in the width direction X are connected to the corresponding side surfaces 130 through a bottom connection part 140.

[0042] In one embodiment, as Figure 1 and 2 shown, each side surface 130 includes a pair of sub-side surfaces 131 arranged along the width direction X. Each sub-side surface 131 is connected to the corresponding front surface 110, and the pair of sub-side surfaces 131 are bent towards each other along the front side edge 111 of the front surface 110. Moreover, the sides of the pair of sub-side surfaces 131 close to each other overlap and are connected, thus forming the side surface 130, that is, the bottom edges of the pair of sub-side surfaces 131 form the side bottom edge 132 of the side surface 130. It should be noted that when the material of the bag body 100 is a non-woven fabric material, heat sealing is used between the pair of sub-side surfaces 131, between the bottom connection part 140 and the side surface 130 or the bottom surface 120. When the material of the bag body 100 is a paper material, gluing is used to connect between the pair of sub-side surfaces 131, between the bottom connection part 140 and the side surface 130 or the bottom surface 120. Regarding the specific selection of the adhesive, no specific limitation is made in this embodiment.

[0043] Of course, in another embodiment, each side surface 130 is connected to the front surface 110 on one side, and a connecting portion is formed at the edge away from the front surface 110 on one side, and is connected to the front surface 110 on the other side through the connecting portion. The specific connection manner between the side surface 130 and the front surface 110 is not limited in this embodiment.

[0044] For ease of understanding, in the following, an example will be given with the side surface 130 including a pair of sub-side surfaces 131.

[0045] In this embodiment, as Figure 3 shown, an avoidance notch 101 is formed at each corner of the bag body 100 in the area where each bottom surface connecting portion 140 is located. The avoidance notch 101 is jointly surrounded by the bent edge of the bag body 100 and the sheet material edge in the area where the bottom surface connecting portion 140 is located.

[0046] The setting of the avoidance notch 101 changes the stress distribution when the bag corner material is bent. When the traditional three-dimensional bag is folded, the connecting portion (bag corner) between the bottom surface 120 and the side surface 130 forms material accumulation due to the superposition of multiple layers of materials (bottom surface 120 + side surface 130 + bottom surface connecting portion 140), resulting in local stress concentration. This avoidance notch 101 reduces the number of material layers in the bending area by removing some materials, and the stress is dispersed along the notch edge, avoiding local over-extrusion.

[0047] Moreover, the avoidance notch 101 provides a deformation space for the bending of the bag corner material. When the bag body 100 is folded, originally multiple layers of materials need to be compressed at the bag corner part. The existence of the avoidance notch 101 enables the materials to displace in the direction of the avoidance notch 101, reducing the stacking of the materials at the bag corner part towards the outside (the direction causing protrusion), thereby reducing the protrusion height of the bag corner. On the one hand, it reduces the resistance during manual or mechanical folding, making the operation smoother. On the other hand, it also makes the bag body 100 more flat after folding.

[0048] Furthermore, since the bottom surface 120 needs to be folded inward when the bag body 100 is folded, multiple complex extending crease lines are formed on the bottom surface 120. In order to reduce the resistance suffered by the inward folding of the bottom surface 120, as Figures 1-3 shown, the bottom surface connecting portion 140 is arranged such that a bottom surface extension portion 141 is formed by the extension of the end of the bottom surface 120 in the width direction X, and each bottom surface extension portion 141 is bent and extends into the inner side of the corresponding side surface 130 and is fixedly connected to the inner surface of the side surface 130.

[0049] Among them, as Figure 3 shown, when viewed along the width direction X of the bag body 100, the avoidance notch 101 is higher than the bottom surface 120, and the lower end of the avoidance notch 101 is flush with the bottom surface 120.

[0050] In this embodiment, the bottom surface 120 is connected to the bottom surface extension 141. The bottom surface extension 141 extends into the inner side of the side surface 130 and is fixed. Without increasing the thickness of the bottom surface 120, the connection between the bottom surface 120 and the side surface 130 is achieved. Moreover, since there is no material stacked in multiple layers on the bottom surface 120, the bottom surface 120 is flatter. On the one hand, it helps the three-dimensional bag 10 to stand upright under the support of the bottom surface 120. On the other hand, it enables items to be placed stably on the bottom surface 120.

[0051] Moreover, since the bottom surface 120 is the main part of the three-dimensional bag 10 for carrying items, when designing the position of the avoidance notch 101, the avoidance notch 101 is made higher than the bottom surface 120, and the lower end of the avoidance notch 101 is flush with the bottom surface 120, that is, the avoidance notch 101 is not opened on the bottom surface 120, ensuring the structural integrity of the bottom surface 120 and enabling the three-dimensional bag 10 to take into account both high load-bearing strength and folding convenience.

[0052] More specifically, as Figure 3 shown, when looking along the width direction X of the bag body 100, the extension line of the extension side 142 of each bottom surface extension 141 in the width direction X passes through the corner end point where the front surface 110 intersects the bottom surface 120.

[0053] Moreover, the outer end point of the side bottom edge 132 of the side surface 130 is located on the front side edge 111 of the front surface 110, at a position spaced from the bottom surface 120. And the side bottom edge 132 of the side surface 130 and the edge of the bottom surface 120 jointly enclose the avoidance notch 101.

[0054] In this embodiment, since the extension line of the extension side 142 of the bottom surface extension 141 in the width direction X passes through the corner end point where the front surface 110 intersects the bottom surface 120, and the outer end point of the side bottom edge 132 of the side surface 130 is located on the front side edge 111 of the front surface 110, at a position spaced from the bottom surface 120, it is ensured that the avoidance notch 101 is higher than the bottom surface 120 in the height direction Z and will not affect the strength of the bottom surface 120 of the bag body 100.

[0055] It should be noted that in Figure 3 , a very small hole will be formed at the joint of the corner of the bottom surface extension 141 and the corner of the sub-side surface 131. For the convenience of understanding in the figure, the hole is enlarged.

[0056] Furthermore, in order to reduce the influence of the avoidance notch 101 on the sealing performance of the accommodation cavity in the bag body 100, an embodiment of the present utility model also provides a three-dimensional bag 10, as Figure 4 shown, a transition portion 150 is further provided between the extension side 142 and the side bottom edge 132.

[0057] Moreover, when viewed in the width direction X of the bag body 100, the transition portion 150 is at least partially located within the avoidance notch 101.

[0058] In this embodiment, the transition portion 150 makes the connection between the side edge 142 of the extension portion and the bottom edge 132 of the side surface smoother, avoiding the formation of sharp edges or gaps at the bending portion, thereby reducing the leakage risk and improving the sealing performance inside the three-dimensional bag 10. Secondly, the transition portion 150 is located within the avoidance notch 101, which can support or fill the material of the bag body 100, preventing the material from being damaged due to extrusion during the folding process.

[0059] In one embodiment, as Figure 4 shown, the transition portion 150 extends from the side edge 142 of the extension portion towards the bottom edge 132 of the side surface.

[0060] Moreover, when viewed in the width direction X of the bag body 100, the transition side edge 151 of the transition portion 150 away from the bottom edge 132 of the side surface extends in the height direction Z.

[0061] Furthermore, each side edge 142 of the extension portion extends obliquely with respect to the front side edge 111 on the corresponding side, and the transition side edge 151 and the bottom edge 132 of the side surface are connected by an arc segment, and the arc segment is tangent to the front side edge 111 on the corresponding side.

[0062] In this embodiment, as Figure 4 shown, the bottom edge 132 of the side surface 130 extends parallel to the plane of the bottom surface 120 in the middle in the width direction X, so that the outer contour of the avoidance notch 101 is similar to a trapezoid.

[0063] Of course, in another alternative embodiment, the bottom edge 132 of the side surface 130 extends obliquely with respect to the plane of the bottom surface 120. As Figure 5 shown, the bottom edge 132 of the side surface 130 extends obliquely towards the bottom surface 120 with respect to the plane of the bottom surface 120, so that the upper edge of the avoidance notch 101 is V-shaped, or the bottom edge 132 of the side surface 130 extends obliquely away from the bottom surface 120 with respect to the plane of the bottom surface 120, so that the upper edge of the avoidance notch 101 is an inverted V-shaped.

[0064] It should be noted that when the bottom edge 132 of the side surface 130 extends parallel to the plane of the bottom surface 120 in the middle in the width direction X, the outer contour of the avoidance notch 101 is more regular, making the three-dimensional bag 10 more beautiful; when the bottom edge 132 of the side surface 130 extends obliquely with respect to the plane of the bottom surface 120, when the three-dimensional bag 10 is folded, the V-shaped avoidance notch 101 can better guide the displacement of the sheet material, which is beneficial to the three-dimensional bag 10 being folded more flatly.

[0065] AsFigure 6 As shown, during the manufacturing process of this three-dimensional bag 10, a pair of front faces 110 are bent from the bottom edge connected to the bottom face 120 towards the bottom face 120, and the bottom face extension 141 is bent from the edge connected to the bottom face 120 towards the bottom face 120. At this time, the transition part side edge 151 will adhere to the inner side of the front face side edge 111, playing a supporting role, and at the same time, it can increase the sealing performance of the bottom face 120. Immediately afterwards, the sub-side face 131 is bent from the front face side edge 111 towards the bottom face extension 141 to enclose and form the bag body 100. The reason why the transition part side edge 151 and the side face bottom edge 132 are connected by an arc-shaped line segment is that, on the one hand, because the transition part side edge 151 (bent along the edge of the bottom face 120) and the side face bottom edge 132 (bent along the bottom edge of the front face 110) are bent in different directions respectively, the arc-shaped connecting segment can reduce the stress concentration at the connection between the two, playing a role in preventing tearing; on the other hand, because the sheet material itself has a thickness, when the bottom face extension 141 is bent, the transition part side edge 151 of the transition part 150 can have a certain avoidance of the front face 110, avoiding interference between the transition part side edge 151 of the transition part 150 and the front face 110.

[0066] It should be noted that Figure 4 and Figure 5 in, in order to better understand the arc-shaped connecting segment between the transition part side edge 151 and the side face bottom edge 132, the distance between the transition part side edge 151 and the front face side edge 111 is enlarged.

[0067] Of course, regarding the structure of the transition part 150, it is not limited to the structure in the above-mentioned embodiment. In another alternative embodiment, as Figure 7 shown, the transition part 150 extends from the front face side edge 111 towards the side face 130.

[0068] And, when viewed along the width direction X of the bag body 100, the transition part 150 is bent and attached to the inner wall of the side face 130, and the transition part side edge 151 away from the front face side edge 111 extends along the height direction Z.

[0069] More specifically, the transition part side edge 151 and the corresponding extension part side edge 142 on one side are connected by an arc-shaped line segment.

[0070] It should be noted that in this embodiment, for the structures of the bottom face extension 141 and the side face bottom edge 132, reference can be made to the structures in the above-mentioned embodiment. For example, each extension part side edge 142 extends obliquely with respect to the corresponding front face side edge 111 on one side, and the side face bottom edge 132 of the side face 130 extends parallel to the plane where the bottom face 120 is located in the middle in the width direction X, or the side face bottom edge 132 of the side face 130 extends obliquely with respect to the plane where the bottom face 120 is located. This embodiment will not be elaborated further.

[0071] Such asFigure 8 As shown, during the manufacturing process of this three-dimensional bag 10, a pair of front sides 110 are bent from the bottom edge connected to the bottom surface 120 towards the bottom surface 120, and the bottom surface extension 141 is bent from the edge connected to the bottom surface 120 towards the bottom surface 120. At this time, a part of the transition part 150 will be pulled by the sub-side surface 131, and another part will be pulled by the bottom surface extension 141, forming redundant sheet material. Then, the sub-side surface 131 is bent from the front side edge 111 towards the bottom surface extension 141 to enclose and form the bag body 100, and the transition part 150 will be bent (see Figure 7 ). The part of the transition part 150 connected to the sub-side surface 131 will cover the part connected to the bottom surface extension 141, while the avoidance notch 101 is completely formed outside the bottom surface extension 141. While reducing materials, the sealing performance of the three-dimensional bag 10 is improved by using the transition part 150.

[0072] Similarly, the reason why the transition part side 151 and the corresponding extension part side 142 on one side are connected by an arc segment is also to prevent tearing.

[0073] Of course, in the above embodiments, the bottom connection part 140 is set such that the bottom surface 120 extends at the end in the width direction X to form the bottom surface extension 141. In another alternative embodiment, the bottom connection part 140 is set as the side surface extension formed at the lower end of the side surface 130 in the height direction Z. Each side surface extension is bent to cover the outside of the corresponding side of the bottom surface 120 and is fixedly connected to the outer surface of the bottom surface 120.

[0074] In this embodiment, when looking along the width direction X of the bag body 100, the outer end of the avoidance notch 101 is flush with the end of the bottom surface 120 in the width direction X, and the avoidance notch 101 is located inside the bottom surface 120.

[0075] Specifically, the side edge of the bottom surface 120 in the width direction X is offset inward. Thus, the side edge of the bottom surface 120 in the width direction X and the sheet material edge in the area where the side surface extension is located jointly enclose and form the avoidance notch 101.

[0076] Furthermore, regarding other structures on the three-dimensional bag 10, this embodiment does not make a unique limitation. Specifically, as Figure 9 shown, for the convenience of carrying, on a pair of front sides 110 of the bag body 100 of this three-dimensional bag 10, a handle 200 is connected to the part near the bag opening.

[0077] The end of the handle 200 can be connected to the corresponding position on the inner surface of the front side 110 in a surface-to-surface fitting manner. Of course, the end of the handle 200 can also be connected to the corresponding position on the outer surface of the front side 110 in a surface-to-surface fitting manner.

[0078] Furthermore, the bag mouth is directly formed by the top ends of the side walls of the bag body 100. It is made of the same material as the side walls of the bag body 100 and opens outward, with relatively low strength. Since objects enter and exit through this bag mouth, the bag mouth of the three-dimensional bag 10 is a very easily damaged part. Therefore, as Figure 2 shown, in one embodiment, a bag mouth bending portion 102 that is folded inward toward the inner side of the accommodating cavity is formed at the opening peripheral edge of the bag body 100. The bag mouth bending portion 102 continuously surrounds the opening of the bag body 100 for one week, thereby strengthening the bag mouth.

[0079] Next, the connection method of the handle 200 when the bag mouth bending portion 102 is provided at the bag mouth of the three-dimensional bag 10 will be described.

[0080] Specifically, as Figure 9 shown, a cut 103 is formed at the fixed position of the bag mouth bending portion 102 for the handle 200. The end of the handle 200 extends into the space between the bag mouth bending portion 102 and the front surface 110 from the cut 103, and the end of the handle 200 is connected to the inner surface of the bag mouth bending portion 102 and the inner surface of the front surface 110.

[0081] Of course, regarding the structure on the three-dimensional bag 10, such as the specific shape of the cut 103 and how the bag mouth bending portions 102 on the pair of split side surfaces 131 are connected, the present invention does not make specific limitations, and those skilled in the art can design according to the actual situation and specific requirements.

[0082] It should be noted that in addition to the implementation manners of the present invention described in the above specific embodiments, 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 is introduced in combination with preferred embodiments, this does not mean that the features of this invention are limited to this implementation manner. On the contrary, the purpose of introducing the invention in combination with the implementation manner is to cover other alternatives or modifications that may be extended based on the claims of the present invention. To provide a deep understanding of the present invention, many specific details are included in the above description, and 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 and features in the embodiments of the present invention can be combined with each other.

[0083] 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.

[0084] 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. Therefore, it should not be construed as a limitation to the present utility model.

[0085] In the description of this embodiment, it should also be noted that unless otherwise clearly specified and limited, 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.

[0086] Although the present utility model has been illustrated and described by referring to some preferred embodiments of the present utility model, those of ordinary skill in the art should understand that the above content is a further detailed description of the present utility model in combination with specific embodiments, and it cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. Those skilled in the art can make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present utility model.

Claims

1. A three-dimensional bag, characterized in that: The bag body comprises a bag having a containing cavity, the bag body comprising a pair of front faces spaced apart in the width direction of the bag body, a bottom face away from a bag opening in the height direction of the bag body, and a pair of side faces respectively connected to the pair of front faces and the bottom face in the length direction of the bag body, the bottom face being connected to the corresponding side faces at both sides in the length direction through a bottom face connecting portion; wherein, A relief gap is formed at each corner of the bag body in the area where the bottom surface connection portion is located. The relief gap is formed by the bent edge of the bag body and the edge of the sheet material in the area where the bottom surface connection portion is located.

2. The three-dimensional bag according to claim 1, characterized in that: The bottom surface connection portion is configured as follows: the bottom surface is extended at the end of the length direction to form a bottom surface extension portion, each of the bottom surface extension portions is bent and extends into the inner side of the side surface on the corresponding side, and is fixedly connected to the inner surface of the side surface; wherein, Viewed along the length direction of the bag body, the avoidance gap is higher than the bottom surface, and the lower end of the avoidance gap is flush with the bottom surface.

3. The three-dimensional bag according to claim 2, characterized in that: When viewed along the length direction of the bag body, the extension line of the side edge of each bottom surface extension portion in the width direction passes through the corner endpoint where the front surface intersects the bottom surface; and The outer end point of the side bottom edge of the side surface is located on the front side edge of the front surface, at a position spaced apart from the bottom surface, and the side bottom edge of the side surface and the edge of the bottom surface together surround the avoidance gap.

4. The three-dimensional bag according to claim 3, characterized in that: in, A transition portion is also provided between the side edge of the extension portion and the bottom edge of the side surface; and When viewed along the length direction of the bag body, the transition portion is at least partially located in the avoidance gap.

5. The three-dimensional bag according to claim 4, characterized in that: in, The transition portion extends from the side edge of the extension portion toward the bottom edge of the side surface; and When viewed along the length direction of the bag body, the side edge of the transition portion away from the bottom edge of the side surface extends along the height direction.

6. The three-dimensional bag according to claim 5, characterized in that: in, When viewed along the length direction of the bag body, each side edge of the extension portion extends obliquely relative to the front side edge of the corresponding side; and, The side edge of the transition portion and the bottom edge of the side surface are connected by an arc segment, and the arc segment is tangent to the front side edge of the corresponding side.

7. The three-dimensional bag according to claim 4, characterized in that: in, The transition portion extends from the front side toward the side surface; and When viewed along the length direction of the bag body, the transition portion is bent and attached to the inner wall of the side surface, and the side edge of the transition portion away from the front side edge extends along the height direction.

8. The three-dimensional bag according to claim 7, characterized in that: in, The side edge of the transition portion and the side edge of the extension portion on a corresponding side are connected by an arc-shaped line segment.

9. The three-dimensional bag according to any one of claims 1 to 8, characterized in that: in, The bottom edge of the side surface of the side surface in the middle portion in the width direction extends parallel to the plane where the bottom surface is located, or extends obliquely relative to the plane where the bottom surface is located.

10. The three-dimensional bag according to claim 9, characterized in that: Each of the side surfaces includes a pair of sub-side surfaces arranged along the width direction, each of the sub-side surfaces is connected to the corresponding front surfaces, and the sides of the pair of sub-side surfaces close to each other overlap and are connected.

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