Packaging bag

Abstract

The utility model discloses a packaging bag which comprises a bag body with a containing cavity, a pair of opposite side faces and a bottom face located at the bottom of the bag body and connected with the pair of side faces are arranged on the bag body in the width direction. Wherein the two sides, in the length direction, of one pair of side faces are each provided with a branch connecting face, the edge, in the width direction, of one of the two branch connecting faces located on the same side in the length direction extends to form a bonding part, and the bonding part and the other branch connecting face are stacked and connected so that connecting faces can be formed on the two sides of the side faces; the connecting face and the bottom face are connected through a connecting part, the pair of side faces and the connecting face are provided with bag opening folded edges which are bent towards the interior of the containing cavity to enhance the strength of the bag opening, and one branch connecting face and the corresponding bag opening folded edge are connected with the other branch connecting face and the corresponding bag opening folded edge in an inserted mode at the position of the bonding part. And the bag opening folding edge can be ensured to continuously surround the bag opening for a circle, so that the bag opening is reinforced.

Description

Technical Field

[0001] The utility model relates to the technical field of packaging, in particular to a packaging bag. Background Art

[0002] With the development of social economy, packaging bags have become an indispensable and common tool in today's society. From the packaging of small items for daily shopping to the transportation of bulk goods in express logistics, the application scenarios of packaging bags are extremely wide, and people's requirements for packaging bags are getting higher and higher.

[0003] Traditional packaging bags usually form the bottom of the bag by gluing the bottom ends of the side walls of the bag together (e.g., paper bags) or hot pressing (e.g., non-woven bags). However, the bottom of this type of bag is simply a connection of the bottom ends of the side walls of the bag. When it is loaded with heavy objects or has been stored for a long time, the connection at the bottom of the bag will fail, resulting in the bag bottom being exposed, the items in the bag falling out, and other undesirable situations. In addition, the bag opening is directly formed by the top of the bag side wall, which is made of the same material as the bag side wall and is open to the outside. It has low strength, and objects are put in and out through the bag opening. Therefore, the bag opening of the bag is a very easy to be damaged part. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problem that the bag opening of the handbag in the prior art is directly formed by the top of the bag side wall, which is made of the same material as the bag side wall and is open to the outside, has low strength, and objects are put in and out through the bag opening. Therefore, the bag opening of the handbag is very easy to be damaged.

[0005] To solve the above technical problems, an embodiment of the utility model discloses a packaging bag, which includes a bag body with a accommodating cavity, the bag body is provided with a pair of side surfaces opposite to each other in the width direction, and a bottom surface located at the bottom of the bag body and connected to the pair of side surfaces.

[0006] Among them, a pair of side surfaces are provided with sub-connecting surfaces on both sides in the length direction, and one of the sub-connecting surfaces located on the same side in the length direction extends from the edge in the width direction to form a bonding portion, and the bonding portion is overlapped and connected with the other sub-connecting surface to form a connecting surface on both sides of the side surface, and the connecting surface and the bottom surface are connected by a connecting portion.

[0007] In addition, a pair of side surfaces and the connecting surface have a bag opening folded edge bent into the accommodating cavity on the side away from the bottom surface in the height direction of the bag body, and one sub-connecting surface and the corresponding bag opening folded edge are plugged into each other with another sub-connecting surface and the corresponding bag opening folded edge at the bonding portion.

[0008] By adopting the above technical solution, a pair of side surfaces of the packaging bag are connected to the bottom surface, and the two side ends of a pair of side surfaces in the length direction are connected by connecting surfaces, and the connecting surfaces and the bottom surface are connected by connecting parts, so that there is a high connection strength between the side surfaces and the connecting surfaces and the bottom surface, ensuring that the packaging bag can carry more items.

[0009] A sub-connecting surface located on the same side in the length direction is connected to another sub-connecting surface through an adhesive portion to form a connecting surface, and a pair of side surfaces and the connecting surface form a bag opening folding edge on one side of the bag opening that is bent into the accommodating cavity and surrounds the bag opening, thereby improving the tear resistance of the bag opening, thereby greatly improving the strength of the bag opening, and making the bag opening more durable and beautiful. Specifically, on the connecting surface, one sub-connecting surface and the corresponding bag opening folding edge are plugged into each other with another sub-connecting surface and the corresponding bag opening folding edge at the adhesive portion, thereby enhancing the connection strength between the bag opening folding edges on the two sub-connecting surfaces, ensuring that the bag opening folding edge can continuously surround the bag opening, thereby strengthening the bag opening.

[0010] Furthermore, during the production process of this packaging bag, it is necessary to first bend the side and the sub-connecting surface to form a bag opening fold, and then connect the two sub-connecting surfaces. After the bonding portion on one sub-connecting surface is overlapped with the other sub-connecting surface, the two sub-connecting surfaces are then staggered in the height direction so that the bag opening fold can be plugged in. In order to make the bag opening folds on the two sub-connecting surfaces plug into each other more smoothly and tightly, in one embodiment, when viewed along the height direction of the bag body, the side edge of the bag opening fold of one sub-connecting surface and / or the bag opening fold of the other sub-connecting surface extends obliquely from the end away from the bending area toward the side away from the bonding portion. As a result, after the bag opening fold is folded, the staggered distance of the bag opening folds on the two sub-connecting surfaces in the height direction can be greatly reduced, which not only simplifies the production process, but also improves production efficiency and product quality.

[0011] Therefore, the inclined extended folded side edge of the bag mouth makes the plug-in process smoother and tighter, reduces the risk of damage to the bag body due to excessive deformation when the two sub-connection surfaces are offset in the height direction, and improves the connection strength and stability of the bag mouth.

[0012] In addition, the obliquely extended bag opening fold also reduces the overlapping thickness of the bag opening fold at the insertion position, making the bag body flatter and facilitating the folding of the packaging bag.

[0013] Further, in one embodiment, the connection portion is configured as a connection surface fold formed at one end of the connection surface close to the bottom surface in the height direction.

[0014] Among them, when the connecting surface is connected to the bottom surface through the connecting surface folded edge, the connecting surface folded edge can be bent toward the bottom surface so that the connecting surface folded edge extends into the inner side of the bottom surface close to the accommodating cavity and is connected to the inner surface of the bottom surface; the connecting surface folded edge can also be bent toward the bottom surface so that the connecting surface folded edge is located on the outer side of the bottom surface away from the accommodating cavity and is connected to the outer surface of the bottom surface.

[0015] Furthermore, in one embodiment, in the width direction, the spacing between the two side edges of the connecting surface fold gradually decreases from the end connected to the connecting surface, so that the contour shape of the connecting surface fold is trapezoidal, and the spacing of the connecting surface fold in the width direction of this trapezoidal shape is narrower than the spacing of the bottom surface, which reduces the risk of the connecting surface fold being misaligned when connected to the bottom surface while ensuring the connection strength between the connecting surface fold and the connecting surface. At the same time, during the production process, the positioning accuracy requirements between the trapezoidal connecting surface fold and the bottom surface are reduced, which reduces the difficulty of producing packaging bags.

[0016] In another embodiment, the connecting portion is configured as a bottom fold formed at an end of the bottom surface in the length direction.

[0017] Among them, when the bottom surface is connected to the connecting surface through the bottom surface folded edge, the bottom surface folded edge can be bent toward the connecting surface so that it extends into the inner side of the connecting surface close to the accommodating cavity and is connected to the inner surface of the connecting surface; the bottom surface folded edge can also be bent toward the connecting surface so that the bottom surface folded edge is located on the outer side of the connecting surface away from the accommodating cavity and is connected to the outer surface of the connecting surface.

[0018] Furthermore, in one embodiment, an auxiliary crease extending in the width direction is formed on the bottom folded edge, beside the junction of the bottom folded edge and the bottom surface.

[0019] Wherein, in the height direction, the edge of the connecting surface close to the bottom surface is flush with the auxiliary fold.

[0020] By adopting the above technical solution, when the bottom surface is connected to the connecting surface through the bottom fold, the lower edge of the connecting surface can be aligned with the auxiliary fold on the bottom fold to avoid the lower edge of the connecting surface protruding from the bottom surface. Under the premise of ensuring the connection strength between the bottom surface and the connecting surface, the aesthetics of the packaging bag is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a packaging bag provided in an embodiment of the utility model;

[0022] Figure 2 A partial schematic diagram of the bag opening and the bag opening folding edge insertion of the packaging bag provided in the embodiment of the utility model;

[0023] Figure 3A schematic diagram of a base material of a bag body of a packaging bag provided in an embodiment of the utility model (the folded edge of the bag opening is not bent);

[0024] Figure 4 A schematic diagram of a base material (the folded edge of the bag mouth is not bent) and a handle and a header provided in an embodiment of the present utility model;

[0025] Figure 5 A first schematic diagram of a handle end of a packaging bag provided by an embodiment of the utility model;

[0026] Figure 6 A second schematic diagram of the handle end of a packaging bag provided by an embodiment of the utility model;

[0027] Figure 7 A third schematic diagram of the handle end of the packaging bag provided by an embodiment of the utility model;

[0028] Figure 8 A schematic diagram of a base material (the folded edge of the bag opening has been bent) and a handle of a packaging bag provided in an embodiment of the utility model;

[0029] Fig. 9 A schematic diagram of a base material (a pair of side bends) and a handle of a packaging bag provided in an embodiment of the utility model;

[0030] Fig.10 A schematic diagram of a base material (a pair of side surfaces are staggered in the height direction) and a handle of a packaging bag provided in an embodiment of the utility model;

[0031] Fig.11 A partial schematic diagram of a packaging bag provided by an embodiment of the utility model, in which the base material of the packaging bag is staggered at the bag opening and the folded edge of the bag opening is staggered in the height direction;

[0032] Fig.12 A partial schematic diagram of the bottom surface of a packaging bag, the intersection of a primary indentation and a secondary indentation provided in an embodiment of the utility model;

[0033] Fig.13 Another partial schematic diagram of the bottom surface of the packaging bag, the intersection of the main indentation and the secondary indentation provided in the embodiment of the utility model;

[0034] Fig.14 Another schematic diagram of a base material of a bag body of a packaging bag provided in an embodiment of the utility model (the folded edge of the bag opening is not bent);

[0035] Fig.15 A schematic diagram of a connection surface of a packaging bag provided in an embodiment of the utility model;

[0036] Fig.16A partial schematic diagram of the connecting surface of the packaging bag provided in an embodiment of the utility model and the folded edge at the bottom surface.

[0037] Description of reference numerals:

[0038] 10. Bag body;

[0039] 100, side view;

[0040] 200, bottom surface; 210, primary indentation; 220, secondary indentation; 230, hollow portion; 231, circular hole; 232, trident-shaped incision;

[0041] 300, sub-connection surface; 310, bonding portion;

[0042] 400, connecting portion; 410, connecting surface folding edge; 420, bottom surface folding edge; 421, auxiliary folding line;

[0043] 500, bag opening fold; 510, opening;

[0044] 600, head card;

[0045] 20. Handle;

[0046] X, width direction; Y, length direction; Z, height direction. DETAILED DESCRIPTION

[0047] As mentioned in the background technology, the bag opening of the prior art handbag is directly formed by the top of the bag side wall, which is made of the same material as the bag side wall and is open outwards. Its own strength is low, and objects enter and exit through the bag opening. Therefore, there is a technical problem that the bag opening of the handbag is very easy to be damaged.

[0048] To this end, the utility model discloses a packaging bag, which includes a bag body with a receiving cavity, the bag body is provided with a pair of side surfaces opposite to each other in the width direction, and a bottom surface located at the bottom of the bag body and connected to the pair of side surfaces. Wherein, a pair of side surfaces are provided with sub-connection surfaces on both sides in the length direction, and one of the sub-connection surfaces located on the same side in the length direction extends from the edge in the width direction to form a bonding portion, the bonding portion is overlapped and connected with the other sub-connection surface to form a connecting surface on both sides of the side surface, the connecting surface and the bottom surface are connected by a connecting portion, the pair of side surfaces and the connecting surface have a bag opening folding edge that is bent into the receiving cavity to enhance the strength of the bag opening, and one sub-connection surface and the corresponding bag opening folding edge are plugged into each other at the bonding portion position to ensure that the bag opening folding edge can continuously surround the bag opening, thereby strengthening the bag opening.

[0049] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0050] like Figure 1 As shown, an embodiment of the utility model discloses a packaging bag, which includes a bag body 10 having a containing cavity, and the bag body 10 is provided with a pair of side surfaces 100 opposite to each other in the width direction X, and a bottom surface 200 located at the bottom of the bag body 10 and connected to the pair of side surfaces 100. It should be noted that in this embodiment, the bag body 10 can be made of non-woven fabric, or can be made of paper or paper-like materials, and the utility model does not make a sole limitation on this.

[0051] The pair of side surfaces 100 are provided with sub-connection surfaces 300 on both sides of the length direction Y. One of the sub-connection surfaces 300 located on the same side of the length direction Y extends along the edge of the width direction X to form a bonding portion 310. The bonding portion 310 (see Figure 3 ) is connected to the overlapped portion of another sub-connection surface 300 to form a connection surface on both sides of the side surface 100, and a connection portion 400 (see Figure 3 ) connection, since the bottom surface 200 of the packaging bag is connected to the side surfaces 100 on both sides, compared with the prior art, in which the bottom ends of the side walls of the bag body are bonded together to form a bag at the bottom of the bag body, the connection strength between the bottom surface and the side surfaces of the packaging bag is greatly enhanced, and the supporting performance of the packaging bag is improved.

[0052] And, if Figures 1 to 3 As shown, a sub-connecting surface 300 located on the same side of the length direction Y is connected to another sub-connecting surface 300 through an adhesive portion 310 to form a connecting surface, and a pair of side surfaces 100 and the connecting surface form a bag opening folding edge 500 on one side of the bag opening that is bent into the accommodating cavity and surrounds the bag opening, thereby improving the tear resistance of the bag opening, thereby greatly improving the strength of the bag opening, and making the bag opening more durable and beautiful. Specifically, on the connecting surface, one sub-connecting surface 300 and the corresponding bag opening folding edge 500 are plugged into each other at the adhesive portion 310 position (see Figure 2 ), compared with the simple overlapping connection of the bag openings on both sides, in this embodiment, the plug-in connection method enhances the connection strength between the bag opening folded edges 500 on the two sub-connecting surfaces 300, ensuring that the bag opening folded edges 500 can be continuously wrapped around the bag opening, thereby strengthening the bag opening.

[0053] It should be noted that during the manufacturing process of such packaging bags, the substrate (such as paper) needs to be cut into a predetermined shape, such as Figure 3As shown, the substrate sequentially forms a side surface 100, a bottom surface 200 and another side surface 100 of the bag body 10, and each side surface 100 forms a connecting surface 300 on both sides of the width direction X. Then, the substrate needs to be folded to enclose and form a bag body 10 with a containing cavity.

[0054] Specifically, Figure 3 , Figure 8 and Fig. 9 As shown, the side of each side surface 100 away from the bottom surface 200 is folded toward the inner surface of the side surface 100 to form a bag opening fold 500, and a pair of side surfaces 100 are bent toward each other so that the pair of side surfaces 100 and the bottom surface 200 are " ”-shaped structure, and then bend the sub-connection surfaces 300 with a pair of side surfaces 100 located on the same side toward each other, so that the bonding portion 310 of one sub-connection surface 300 overlaps with the other sub-connection surface 300. At this time, Fig.10 and Fig.11 As shown, the two sub-connecting surfaces 300 need to be staggered in the height direction Z of the bag body 10 to form a height difference, and then the bonding portion 310 and the corresponding bag opening fold 500 are inserted between the other sub-connecting surface 300 and the corresponding bag opening fold 500, or the other sub-connecting surface 300 and the corresponding bag opening fold 500 are inserted between the bonding portion 310 and the corresponding bag opening fold 500. Then, one sub-connecting surface 300 is connected to the other sub-connecting surface 300 through the bonding portion 310 to form a connecting surface, and the connecting surface is connected to the bottom surface 200 through the connecting portion 400.

[0055] The side of each side surface 100 facing away from the bottom surface 200 is bent to form a bag opening fold 500, which can be achieved by bending a pair of side surfaces 100 and the bottom surface 200 into a " ” shape, or before a pair of side surfaces 100 and a bottom surface 200 are bent into a “ "-shaped structure, the utility model does not make a sole limitation to this.

[0056] It should be noted that the parts on the bag body 10 that need to be connected can be fixed by gluing, heat sealing, or the like. For example, when the material of the bag body 10 is non-woven fabric, it can be connected by heat sealing. For another example, when the material of the bag body 10 is paper material, it can be connected by bonding. The present invention does not make any specific limitation on this.

[0057] The structure of the bag opening of the packaging bag is described in detail below.

[0058] like Figure 1 and Figure 2As shown, this packaging bag is folded on the side of each side 100 away from the bottom surface 200 toward the inner surface of the side 100 to form a bag opening fold 500, thereby achieving the effect of improving the strength of the bag opening, and in order to ensure that the bag opening fold 500 can continuously surround the bag opening, one sub-connecting surface 300 and the corresponding bag opening fold 500 are plugged into each other with another sub-connecting surface 300 and the corresponding bag opening fold 500 at the bonding portion 310.

[0059] Optionally, in one embodiment, Figure 3 As shown, in order to make the pocket folds 500 on the two sub-connecting surfaces 300 more smoothly and tightly plugged into each other, when viewed along the height direction Z of the bag body 10, the pocket fold 500 of one sub-connecting surface 300 and / or the pocket fold 500 of the other sub-connecting surface 300, its side edge extends obliquely from the end away from the bending area toward the side away from the bonding portion 310. That is to say, optionally, the side edge of the pocket fold 500 of one sub-connecting surface 300 extends obliquely from the end away from the bending area toward the side away from the bonding portion 310, and the side edge of the pocket fold 500 of the other connecting surface extends along the height direction Z of the bag body 10, or the side edges of the pocket fold 500 of one sub-connecting surface 300 and the pocket fold 500 of the other sub-connecting surface 300 extend obliquely from the end away from the bending area toward the side away from the bonding portion 310.

[0060] Therefore, after the pocket fold 500 is folded, the offset distance of the pocket fold 500 on the two sub-connecting surfaces 300 in the height direction Z can be greatly reduced, which not only simplifies the production process, but also improves production efficiency and product quality.

[0061] In addition, the obliquely extended bag opening fold 500 also reduces the overlapping thickness of the bag opening fold 500 at the insertion position, making the bag body 10 flatter and facilitating the folding of the packaging bag.

[0062] Of course, the inclination angle of the side edge of the pocket fold 500 of the sub-connecting surface 300 relative to the height direction Z of the bag body 10 is between 15° and 75°, for example, it can be 15°, 30°, 35°, 40°, 45°, 60°, 75° or any other angle within the above angle range. It should be noted that if the inclination angle of the side edge of the pocket fold 500 relative to the height direction Z of the bag body 10 exceeds 75°, the overlapping and plugging parts of the two pocket folds 500 are small, and the effect of strengthening the connection strength cannot be played. If the inclination angle of the side edge of the pocket fold 500 relative to the height direction Z of the bag body 10 is less than 15°, the pocket folds 500 of the two sub-connecting surfaces 300 still need to stagger a large height difference in the height direction Z during the plugging process, and the difficulty of the plugging operation cannot be simplified.

[0063] Of course, the operation of plugging the pocket folds 500 on the two sub-connecting surfaces 300 is not limited to the above-mentioned embodiment, in which the two pocket folds 500 are made to have a height difference in the height direction Z. It can also be done by manually opening one of the pocket folds 500 from the side edge and then inserting the other pocket fold 500. This embodiment does not make a sole limitation on this.

[0064] Further, if Figure 1 As shown, in order to make it easier for users to carry, the packaging bag further includes a pair of handles 20 at the opening of the bag body 10, respectively fixed to a pair of side surfaces 100. The handles 20 are ropes with an oblate or circular cross section, or are sheet structures cut into a U shape, which is not specifically limited in this embodiment.

[0065] Furthermore, when a bag opening fold 500 is formed around the bag opening of the packaging bag, an opening 510 is formed on the bag opening fold 500 of each side surface 100 at a position corresponding to the two free ends of the handle 20 .

[0066] Specifically, in one embodiment, Figure 3 and Figure 4 As shown, the free end of each handle 20 extends from the inner side of the bag body 10 into the corresponding opening 510 and extends to between the bag fold 500 and the side 100. When the bag fold 500 is bent toward the side 100, the free end of the handle 20 is fixedly connected to the inner surface of the bag fold 500 and the inner surface of the side 100.

[0067] It should be noted that in order to improve the connection strength between the handle 20 and the bag body 10, the two free ends of the handle 20 extending into the opening 510 are arranged in any one of the following shapes: bending and extending in a direction away from each other, bending and extending in a direction close to each other, or bending and extending in a spiral shape.

[0068] like Figure 5 As shown, in one embodiment, the two free ends of the handle 20 extend into the opening 510 to bend and extend in directions away from each other.

[0069] like Figure 6 As shown, in another embodiment, the two free ends of the handle 20 extending into the opening 510 are bent and extended in directions approaching each other.

[0070] like Figure 7 As shown, in another embodiment, the two free ends of the handle 20 extend into the opening 510 to extend along a spiral curve.

[0071] Through the above-mentioned arrangements, the actual connection area between the end of the handle 20 and the bag body 10 can be increased, thereby improving the connection strength between the handle 20 and the bag body 10.

[0072] Of course, in order to improve the connection strength between the handle 20 and the bag body 10, it is not only possible to increase the actual connection area between the end of the handle 20 and the bag body 10, in another embodiment, such as Figure 4 As shown, a head card 600 can be provided between a pair of side surfaces 100 and the corresponding bag opening fold 500 , at the two free ends of the handle 20 , and in the height direction Z, the head card 600 is closer to the bottom surface 200 than the opening 510 .

[0073] Regarding the configuration of the header card 600, in one embodiment, Figure 4 As shown, before the bag opening fold 500 is folded inward, the head clip 600 is connected to the inner surface of the side 100 until the bag opening fold 500 is folded inward, and the free end of the handle 20 is fixedly connected between the head clip 600 and the bag opening fold 500 (see Figure 8 ).

[0074] In another embodiment, the header clip 600 is connected to the inner surface of the bag opening fold 500 , and the free end of the handle 20 is fixedly connected between the side surface 100 and the header clip 600 .

[0075] In this embodiment, the header clip 600 disposed between the bag body 10 and the end of the handle 20 can strengthen the connection strength between the bag body 10 and the handle 20, and can also enhance the strength of the bag opening.

[0076] The connection surface of the packaging bag is described in detail below.

[0077] A pair of side surfaces 100 of this packaging bag are provided with sub-connecting surfaces 300 on both sides of the length direction Y. The two sub-connecting surfaces 300 located on the same side are connected to each other by an adhesive portion 310 to achieve the function of connecting the pair of side surfaces 100, and the connecting surface is connected to the bottom surface 200 by a connecting portion 400, so that the pair of side surfaces 100, the connecting surface and the bottom surface 200 are surrounded to form a accommodating cavity.

[0078] In one embodiment, if Figure 3As shown, the two sub-connecting surfaces 300 located on the same side of a pair of side surfaces 100 are symmetrically arranged, the two sub-connecting surfaces 300 are bent toward each other, the side edges of the two sub-connecting surfaces 300 are connected to each other, and the side edge of one of the sub-connecting surfaces 300 extends at the edge of the width direction X to form a bonding portion 310, and the bonding portion 310 overlaps the other sub-connecting surface 300 to facilitate the connection of the two sub-connecting surfaces 300. Regarding the connection method of the two sub-connecting surfaces 300, glue bonding can be used, and this embodiment does not make a specific limitation on this.

[0079] Of course, the two sub-connecting surfaces 300 may also be arranged asymmetrically, for example, the width of one of the sub-connecting surfaces 300 is twice the width of the other sub-connecting surface 300. It is only necessary to ensure that after the two sub-connecting surfaces 300 are bent toward each other, the side edges of the two sub-connecting surfaces 300 can be connected to each other, thereby realizing the connection of the two sub-connecting surfaces 300. The present invention does not make a sole limitation on this.

[0080] Regarding the connection method between the connection surface and the bottom surface 200, as shown in FIG. Figure 3 and Figure 4 As shown, in one embodiment, the connection portion 400 is configured as a connection surface fold 410 formed at one end of the connection surface close to the bottom surface 200 in the height direction Z. Specifically, a portion of the connection surface fold 410 is formed on each of the two sub-connection surfaces 300. When the two sub-connection surfaces 300 are connected by the bonding portion 310, the portion of the connection surface fold 410 on the two sub-connection surfaces 300 is also connected by the bonding portion 310, thereby forming the entire connection surface fold 410.

[0081] Among them, when the connecting surface is connected to the bottom surface 200 through the connecting surface folded edge 410, the connecting surface folded edge 410 can be bent toward the bottom surface 200, so that the connecting surface folded edge 410 extends into the inner side of the bottom surface 200 close to the accommodating cavity and is connected to the inner surface of the bottom surface 200; the connecting surface folded edge 410 can also be bent toward the bottom surface 200, so that the connecting surface folded edge 410 is located on the outer side of the bottom surface 200 away from the accommodating cavity, and is connected to the outer surface of the bottom surface 200.

[0082] Furthermore, in one embodiment, in the width direction X, the spacing between the two side edges of the connecting surface fold 410 gradually decreases from the end connected to the connecting surface, so that the contour shape of the connecting surface fold 410 is trapezoidal, and the spacing of the trapezoidal connecting surface fold 410 in the width direction X is narrower than the spacing of the bottom surface 200, which reduces the risk of the connecting surface fold 410 being misaligned when connected to the bottom surface 200 while ensuring the connection strength between the connecting surface fold 410 and the connecting surface. At the same time, during the production process, the positioning accuracy requirements between the trapezoidal connecting surface fold 410 and the bottom surface 200 are reduced, reducing the difficulty of producing the packaging bag.

[0083] It should be noted that the design of the packaging bag needs to take into account both the load-bearing strength and the convenience of folding, so that the packaging bag can not only carry the items well, but also ensure that the bag body 10 can be conveniently stored and transported. For this purpose, the utility model also provides a packaging bag, such as Figure 3 As shown, a main indentation 210 extending along the length direction Y is formed in the middle of the bottom surface 200 , and ends of the main indentation 210 are connected to two corners of the bottom surface 200 on the same side of the length direction Y through secondary indentations 220 .

[0084] The bottom surface 200 of the packaging bag can be folded along the main indentation 210 and the secondary indentation 220 toward the inside or outside of the bag body 10, and a pair of side surfaces 100 can be fitted toward each other along the width direction X, so that the bag body 10 is in a folded state, which is convenient for carrying and transporting the packaging bag.

[0085] Furthermore, during the folding process, Fig.12 and Fig.13 As shown, in order to ensure that the bag body 10 can be folded more smoothly along the indentation and avoid folding difficulties caused by material accumulation, a hollow portion 230 is formed on the bottom surface 200 at the position where the main indentation 210 and the secondary indentation 220 meet.

[0086] Specifically, Fig.12 As shown, in one embodiment, the hollow portion 230 is configured as: a circular hole 231 at the junction of the main indentation 210 and the secondary indentation 220. The hollow portion 230 has a simple shape, is easy to process, and can effectively promote the folding of the bag body 10.

[0087] like Fig.13 As shown, in another embodiment, a trident-shaped cutout 232 extends from the junction of the main indentation 210 and the secondary indentation 220 toward the main indentation 210 and the secondary indentation 220 respectively. The shape of the hollow portion 230 is more complex, but compared to the circular hole 231, the trident-shaped cutout 232 can make the bottom surface 200 produce a greater deformation along the indentation, better disperse the accumulation of materials, and provide greater folding flexibility and stability.

[0088] Furthermore, in order to increase the carrying capacity of the packaging bag, in one embodiment, a bottom card (not shown in the figure) matching the shape of the bottom surface 200 is provided on the inner surface of the bottom surface 200 in the accommodating cavity.

[0089] This bottom card can be connected to the bottom surface 200 of the bag body 10 by adhesive bonding, or can be simply placed on the bottom surface 200, so as to share the pressure of the items in the cavity on the bottom surface 200 and improve the carrying capacity of the packaging bag.

[0090] Regarding the structure of the connecting portion 400, in another embodiment, as Fig.14 As shown, the connection portion 400 is configured as a bottom fold 420 formed at the end of the bottom surface 200 in the length direction Y.

[0091] Among them, Fig.15 As shown, when the bottom surface 200 is connected to the connecting surface through the bottom surface folded edge 420, the bottom surface folded edge 420 can be bent toward the connecting surface so that it extends into the inner side of the connecting surface close to the accommodating cavity and is connected to the inner surface of the connecting surface; in another embodiment, the bottom surface folded edge 420 can also be bent toward the connecting surface so that the bottom surface folded edge 420 is located on the outer side of the connecting surface away from the accommodating cavity and is connected to the outer surface of the connecting surface.

[0092] Of course, it should be noted that the bottom folded edge 420 disposed on the bottom surface 200 can also be configured to be a trapezoidal structure like the connecting surface folded edge 410 , and this embodiment does not make the sole limitation to this.

[0093] Furthermore, in one embodiment, Fig.16 As shown, on the bottom folded edge 420, an auxiliary fold 421 extending along the width direction X is formed beside the junction of the bottom folded edge 420 and the bottom surface 200.

[0094] In the height direction Z, the edge of the connecting surface close to the bottom surface 200 is flush with the auxiliary fold 421 .

[0095] In this embodiment, when the bottom surface 200 is connected to the connecting surface through the bottom surface fold 420, the lower edge of the connecting surface can be aligned with the auxiliary fold 421 on the bottom surface fold 420 to prevent the lower edge of the connecting surface from protruding from the bottom surface 200. Under the premise of ensuring the connection strength between the bottom surface 200 and the connecting surface, the aesthetics of the packaging bag is improved.

[0096] It should be noted that, in addition to the implementation methods of the utility model described in the above-mentioned specific specific embodiments, those skilled in the art can easily understand other advantages and functions of the utility model from the contents disclosed in this specification. Although the description of the utility model is introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the utility model. In order to provide an in-depth understanding of the utility model, the above description contains many specific details, and the utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments in the utility model and the features in the embodiments can be combined with each other.

[0097] 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.

[0098] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0099] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0100] 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.

[0101] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above contents are further detailed descriptions of the present invention in combination with specific embodiments, and it cannot be determined that the specific implementation of the present invention 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 invention.

Claims

1. A packaging bag, characterized in that: The invention comprises a bag body having a containing cavity, wherein the bag body is provided with a pair of side surfaces opposite to each other in the width direction, and a bottom surface located at the bottom of the bag body and connected to the pair of side surfaces; wherein, The pair of side surfaces are provided with sub-connection surfaces on both sides in the length direction, one of the sub-connection surfaces located on the same side in the length direction extends from the edge in the width direction to form an adhesive portion, the adhesive portion is overlapped and connected with the other sub-connection surface to form a connection surface on both sides of the side surface, and the connection surface and the bottom surface are connected by a connection portion; and The pair of side surfaces and the connecting surface have a bag opening folded edge bent into the accommodating cavity on the side away from the bottom surface in the height direction of the bag body, and one of the sub-connecting surfaces and the corresponding bag opening folded edge is plugged into each other at the bonding portion with another sub-connecting surface and the corresponding bag opening folded edge.

2. The packaging bag according to claim 1, characterized in that: Viewed along the height direction of the bag body, the side edges of the bag opening fold of one of the sub-connecting surfaces and / or the bag opening fold of another of the sub-connecting surfaces extend obliquely from the end away from the bending area toward the side away from the bonding portion.

3. The packaging bag according to claim 1, characterized in that: The connection portion is configured as: a connection surface fold formed at one end of the connection surface close to the bottom surface in the height direction; wherein The folded edge of the connecting surface is bent toward the bottom surface, extends into the inner side of the bottom surface close to the accommodating cavity, and is connected to the inner surface of the bottom surface; or, The folded edge of the connecting surface is bent toward the bottom surface, is located at the outer side of the bottom surface away from the accommodating cavity, and is connected to the outer surface of the bottom surface.

4. The packaging bag according to claim 3, characterized in that: In the width direction, the distance between the two side edges of the folded edge of the connecting surface gradually decreases from the end connected to the connecting surface, so that the contour shape of the folded edge of the connecting surface is trapezoidal.

5. The packaging bag according to claim 1, characterized in that: The connecting portion is configured as a bottom fold formed at the end of the bottom surface in the length direction; wherein The bottom folded edge is bent toward the connecting surface, extends into the inner side of the connecting surface close to the accommodating cavity, and is connected to the inner surface of the connecting surface; or, The bottom folded edge is bent toward the connecting surface, located at the outer side of the connecting surface away from the accommodating cavity, and connected to the outer surface of the connecting surface.

6. The packaging bag according to claim 5, characterized in that: On the bottom fold, beside the junction of the bottom fold and the bottom, an auxiliary fold extending along the width direction is formed; wherein, In the height direction, the edge of the connecting surface close to the bottom surface is flush with the auxiliary fold.

7. The packaging bag according to any one of claims 1 to 6, characterized in that: It also includes a pair of handles arranged at the opening of the bag body and respectively fixed to the pair of side surfaces, and an opening is formed on the bag opening fold of each of the side surfaces at positions corresponding to the two free ends of the handles; wherein The free end of each handle extends from the inner side of the bag body into the corresponding opening, extends to between the bag opening fold and the side surface, and is fixedly connected to the inner surface of the bag opening fold and the inner surface of the side surface.

8. The packaging bag according to claim 7, characterized in that: A head clip is provided between the pair of side surfaces and the corresponding bag opening folded edges and at the two free ends of the handle, and in the height direction, the head clip is closer to the bottom surface than the opening; wherein, The head clip is connected to the inner surface of the side surface, and the free end of the handle is fixedly connected between the head clip and the bag opening fold; or, The head clip is connected to the inner surface of the bag opening fold, and the free end of the handle is fixedly connected between the side surface and the head clip.

9. The packaging bag according to claim 7, characterized in that: The two free ends of the handle extend into the opening in any one of a bent and extended direction away from each other, a bent and extended direction approaching each other, or a spirally bent and extended shape.

10. The packaging bag according to claim 7, characterized in that: In the width direction, a main indentation extending along the length direction is formed in the middle of the bottom surface, and the ends of the main indentation are connected to two corners of the bottom surface located on the same side of the length direction through secondary indentations; and A hollow portion is formed on the bottom surface at a position where the main indentation and the secondary indentation meet.

11. The packaging bag according to claim 10, characterized in that: The hollow portion is configured as: a circular hole at the junction of the primary indentation and the secondary indentation; or A trident-shaped cutout extends from a junction of the primary indentation and the secondary indentation toward the primary indentation and the secondary indentation, respectively.

12. The packaging bag according to claim 7, characterized in that: In the accommodating cavity, a bottom card matching the shape of the bottom surface is arranged on the inner surface of the bottom surface.

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