Packaging bag

Abstract

The utility model discloses a packaging bag which comprises a bag body internally provided with a containing cavity, and the bag body comprises a pair of front faces oppositely arranged in the thickness direction of the bag body, a pair of side faces oppositely arranged in the width direction of the bag body and a bottom face arranged at the bottom of the bag body in the height direction of the bag body. The top of one of the pair of front faces is provided with a turning cover capable of turning over in the width direction, and fixing parts protruding out of the bag body in the width direction are formed at the two ends of the turning cover. Moreover, when the turning cover is in a closed state, the inner wall surface of the turning cover is attached to the outer wall surface of the other front surface of the pair of front surfaces, and the fixing parts at the two ends of the turning cover turn over in the height direction, bypass the corresponding side surfaces and are fixed to the outer wall surface of one front surface, so that the connection strength of the turning cover and the bag body is higher; and the risk that the articles fall out of the bag opening due to bumping and shaking is avoided.

Description

Technical Field

[0001] This utility model relates to the field of packaging technology, and in particular to a packaging bag. Background Technology

[0002] A packaging bag is a simple type of bag. The materials used to make packaging bags include paper, plastic, non-woven fabric, industrial cardboard, canvas, etc. Packaging bags are commonly used for product packaging, promotional gifts, and storing gifts.

[0003] However, in existing packaging bags, the opening is usually open when items are placed inside; it is not typically closed. When packaging valuables (such as gold jewelry), food, or clothing, if the opening is open, the items inside may be damaged or spoiled by rainwater during transport, or may fall out of the bag due to the bumpy ride, leading to loss.

[0004] Although existing packaging bags have flaps at the opening to seal the bag, the flaps simply fold to cover the opening and do not secure it. While this may protect against rain, if the bag is bumped or the user accidentally lets go of the handle and the bag falls, the contents will still fall out.

[0005] Therefore, existing packaging bags have the problem of low reliability in use, as the contents may fall out of the bag opening when the bag is bumped or accidentally dropped by the user. Utility Model Content

[0006] The purpose of this utility model is to solve the problem that in the prior art, when packaging bags are used, the items inside the packaging bag will fall out of the bag opening when the bag is bumped or the user accidentally drops it, resulting in low safety of the packaging bag.

[0007] To solve the above problems, the present invention provides a packaging bag, including a bag body, the bag body including a pair of front faces arranged opposite each other in the thickness direction of the bag body, a pair of side faces arranged opposite each other in the width direction of the bag body, and a bottom surface arranged at the bottom of the bag body along the height direction of the bag body, and the pair of front faces and the pair of side faces surround the top of the bag body to form a bag opening; wherein, the top of one of the pair of front faces is provided with a flap that can be flipped around the width direction, and the two ends of the flap are formed with fixing parts protruding from the bag body along the width direction.

[0008] The flap flips around the top of one of the front sides in the width direction to switch between a closed state with the bag opening closed and an open state with the bag opening exposed; and when the flap is in the closed state, the inner wall of the flap fits against the outer wall of the other of the pair of front sides, and the fixing parts at both ends of the flap flip around the corresponding side in the height direction and are fixed to the outer wall of one of the front sides.

[0009] Using the above technical solution, when the item is placed into the bag through the opening during use, the flap flips over the top of one front side in the width direction and fits against the outer wall of the other front side, thereby sealing the opening. The bag is closed, ensuring that the opening is airtight during use, preventing rainwater, dust, etc. from entering the bag and reducing the risk of damage to the items placed inside.

[0010] Furthermore, after the flap is attached to the outer wall of the other front side, the fixing parts at both ends of the flap are rotated around their respective sides in the height direction and then fixed to the outer wall of the other front side. On the one hand, because the base material of the bag body is a flexible material (such as non-woven fabric, paper, or plastic), the fixing parts allow the inner walls of the top of the two front sides to be attached to each other, further improving the sealing performance of the bag body. On the other hand, after the fixing parts are fixed to the outer wall of one front side, the flap is fixed relative to the bag body, and the positions of the two front sides are relatively fixed. Therefore, when the packaging bag encounters bumps, shaking, or is accidentally dropped during use, the contents of the bag will not fall out of the bag opening because the flap is fixed relative to the bag body and the two front sides are relatively fixed, thus ensuring the safety and reliability of this packaging bag.

[0011] Furthermore, in one embodiment of the packaging bag, the flap is integrally formed with the top edge of a front side; or, the flap is detachably attached to the top of a front side.

[0012] By adopting the above technical solution, the connection strength between the flap and the bag body is increased by making the flap integrally formed with the top edge of the front side, thus avoiding the risk of the flap separating from the bag body during use. By making the flap detachably connected to the top of the front side, the flap can be removed from the bag body when the bag opening does not need to be closed during use, so that the bag opening is always open. Therefore, this type of packaging bag also has the advantage of wide applicability.

[0013] Furthermore, in one embodiment of the packaging bag, the inner sidewall of the flap is provided with a fixing member extending in the width direction. In the width direction, the two ends of the fixing member extend out of the two ends of the flap and extend to the sidewall of the corresponding fixing part and are fixedly connected to the corresponding fixing part.

[0014] When the flip cover is in the closed state, the flip cover is in contact with the outer wall of the other front side, and the fixing parts at both ends of the flip cover are rotated around their respective sides in the height direction and fixed to the side wall of the front side through the fixing parts.

[0015] With the above technical solution, when the flip cover is in the closed state, the fixing parts at both ends of the flip cover are fixed to the side wall of one front side through the fixing components, so that the fixing parts at both ends of the flip cover are not easy to detach from the side wall of one front side. As a result, after the inner wall of the flip cover is attached to the outer wall of the other front side, the flip cover is not easy to loosen during the use of this packaging bag, thus ensuring the reliability of the use of this packaging bag.

[0016] Furthermore, in one embodiment of the packaging bag, when the flap is flipped open to close the bag opening in the width direction, the flap is folded at least once in the width direction.

[0017] Using the above technical solution, in order to further improve the sealing performance of the bag during use, when it is necessary to keep the bag opening closed, the inner wall of the flap can be attached to the outer wall of another front side, and then the flap and the top of the pair of front sides can be folded together. Finally, the fixing parts at both ends of the flap can be fixed to the outer wall of one front side by fixing components.

[0018] Furthermore, in one embodiment of a packaging bag, the fixing component is configured as a plastic part disposed on the side wall of the flap along the width direction, and when the flap is flipped around the width direction to close the bag opening, the flap is attached to another front side, and the two ends of the plastic part drive their respective corresponding fixing parts to flip around the height direction and snap onto the side wall surface of one front side.

[0019] Alternatively, the fixing component is set as an adhesive piece on the side wall of the flap along the width direction, and when the flap is flipped around the width direction to close the bag opening, the flap is attached to another front side and fixedly bonded by the adhesive piece, the fixing parts at both ends of the flap drive the two ends of their respective adhesive pieces to flip around the height direction, and the fixing parts are attached to the outer wall surface of one front side and fixedly bonded by the two ends of the adhesive piece.

[0020] By adopting the above technical solution, when the fixing component is set as a plastic part and the bag opening is in the closed state, the corresponding fixing parts are snapped onto a front side wall surface by the two ends of the plastic part, thereby fixing the flap relative to the bag body; when the flap needs to be opened, the flap can be opened by detaching the plastic part from a front side wall surface; therefore, by setting the fixing component as a plastic part, it has the advantage of making it easy to open or close the bag opening.

[0021] Furthermore, when the fixing component is set as an adhesive part, when closing the bag opening, the flap is first attached to another front side and fixed with the adhesive part, and then the fixing parts at both ends of the flap are fixed with the outer wall of one front side with the adhesive part. This makes the connection strength between the flap and the bag body higher, and the adhesive part setting also makes the flap seal the bag opening better.

[0022] Furthermore, in one embodiment of the packaging bag, a pair of limiting openings corresponding to the ends of the fixing parts at both ends of the flap are provided on the outer wall of one front side. When the flap is in the closed state, the end of each fixing part extends into its corresponding limiting opening.

[0023] By adopting the above technical solution and setting a limiting opening, when the flap is in the closed state, after the end of each fixing part is inserted into its corresponding limiting opening, on the one hand, the end of the fixing part will not protrude from the outer wall surface of the front, thus making the bag more aesthetically pleasing; on the other hand, the limiting opening can limit the fixing part, fixing it relative to the outer wall surface of the front, thereby fixing the flap and the bag body relatively, ensuring the safety and reliability of this packaging bag. Attached Figure Description

[0024] Figure 1 A schematic diagram of the overall structure of the packaging bag (with the bag opening in the open state) provided in an embodiment of this utility model;

[0025] Figure 2 A schematic diagram of the overall structure of a packaging bag (with the bag opening closed and the fixing part not flipped around the height direction) provided in an embodiment of this utility model;

[0026] Figure 3 A rear view of a packaging bag (with the bag opening closed and the fixing part rotated and extended into the limiting opening in the height direction) provided for an embodiment of this utility model;

[0027] Figure 4 A front view of a packaging bag (with the bag opening in the open state) provided for an embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the overall structure of a packaging bag (with the opening in the open state and including a handle) provided in an embodiment of the present utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Packaging bag; 2. Bag body;

[0031] 10. Front;

[0032] 20. Side view;

[0033] 30. Bottom surface;

[0034] 40. Flip cover;

[0035] 400. Fixing part;

[0036] 410. Fixed components;

[0037] 420. Limiting opening;

[0038] 50. Handle;

[0039] L represents the width direction; W represents the thickness direction; H represents the height direction. Detailed Implementation

[0040] As described in the background section, existing packaging bags have flaps at the opening to seal the bag. However, when sealing the bag, the flaps simply fold to cover the opening and do not secure it. Although they can protect against rain, if the bag is bumped or the user accidentally lets go of the handle and the bag falls, the contents will still fall out of the bag.

[0041] To address the aforementioned problems, this utility model provides a packaging bag. During use, after items are placed into the bag through the opening, the flap flips over the top of one front panel in the width direction and adheres to the outer wall of the other front panel. The fixing parts at both ends of the flap flip over the corresponding sides in the height direction and are then fixed to the outer wall of one front panel. On one hand, because the bag's base material is flexible (such as non-woven fabric, paper, or plastic), the fixing parts allow the inner walls of the top of the two front panels to adhere to each other, further improving the bag's sealing performance. On the other hand, after the fixing parts are fixed to the outer wall of one front panel, the flap is fixed relative to the bag body, and the positions of the two front panels are relatively fixed. Therefore, when the packaging bag encounters bumps, shaking, or is accidentally dropped during use, the items inside the bag will not fall out of the opening because the flap is fixed relative to the bag body, thus ensuring the safety and reliability of this packaging bag.

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0043] like Figures 1-3 As shown, the overall structure of this packaging bag will be explained first.

[0044] A packaging bag 1 includes a bag body 2 with an internal receiving cavity. The bag body 2 includes a pair of front faces 10 disposed opposite each other in the thickness direction W of the bag body 2, a pair of side faces 20 disposed opposite each other in the width direction L of the bag body 2, and a bottom surface 30 disposed at the bottom of the bag body 2 along the height direction H of the bag body 2. The pair of front faces 10 and the pair of side faces 20 surround the top of the bag body 2 to form a bag opening. When an item (such as food or a gift) is contained in this packaging bag 1, the item is placed into the receiving cavity of the bag body 2 through the bag opening.

[0045] Specifically, one of the pair of front faces 10 has a flap 40 at its top that can be flipped around the width direction L, and both ends of the flap 40 have fixing parts 400 that protrude from the bag body 2 along the width direction L. The flap 40 flips around the width direction L relative to the top of one of the front faces 10 to switch between a closed state with the bag opening closed and an open state with the bag opening exposed; and when the flap 40 is in the closed state, the inner wall surface of the flap 40 is in contact with the outer wall surface of the other of the pair of front faces 10, and the fixing parts 400 at both ends of the flap 40 are flipped around the height direction H to bypass their respective side surfaces 20 and are fixed to the outer wall surface of one of the front faces 10, thereby making the connection strength between the flap 40 and the bag body 2 stronger and avoiding the risk of items falling out of the bag opening due to bumps or shaking.

[0046] More specifically, the working principle of this packaging bag 1 is as follows: During the use of this packaging bag 1, after the item is placed into the bag body 2 through the bag opening, the flap 40 flips relative to the top of one front side 10 around the width direction L and fits against the outer wall of the other front side 10, thereby sealing the bag opening with the flap 40. The bag opening is in a closed state, thus ensuring that the bag opening of this packaging bag 1 is sealed during use, preventing rainwater, dust, etc. from entering the bag body 2, reducing the risk of damage to the items placed in the bag body 2.

[0047] Furthermore, after the flap 40 is attached to the outer wall of the other front 10, the fixing parts 400 at both ends of the flap 40 are rotated around their respective sides 20 in the height direction H and then fixed to the outer wall of the front 10. On the one hand, because the base material of the bag body 2 is a flexible material (such as non-woven fabric, paper, or plastic), the fixing parts 400 can make the inner walls of the top of the pair of front 10s fit together, further improving the sealing performance of the bag body 2. On the other hand, after the fixing parts 400 are fixed to the outer wall of the front 10, the flap 40 is fixed relative to the bag body 2, and the positions of the pair of front 10s are relatively fixed. Therefore, when the packaging bag 1 is bumped, shaken, or accidentally dropped during use, the contents of the bag body 2 will not fall out of the bag opening because the flap 40 is fixed relative to the bag body 2 and the pair of front 10s are relatively fixed, thus ensuring the safety and reliability of the packaging bag 1.

[0048] More specifically, when the flap 40 is in the closed state, it is in contact with the outer wall of the other front 10. The fixing parts 400 at both ends of the flap 40 are flipped around their respective side 20 in the height direction H and then fixed to the outer wall of the front 10. Thus, the fixing parts 400 at both ends of the flap 40 limit the positions of the pair of front 10 and the pair of side 20. This ensures that during the use of this packaging bag 1, the peripheral wall at the bag opening will not be shaken or bumped, causing one or both peripheral walls at the bag opening to detach from the flap 40 and open the bag opening. This further ensures the reliability and safety of the use of this packaging bag 1.

[0049] Optionally, in one feasible implementation, a bag opening fold (not shown in the figure) is provided on the top of a pair of side panels 20 and the other front panel 10 in the height direction H. This not only increases the strength and durability of the bag opening, but also provides additional support for the closure of the bag opening, and makes the edges of the bag opening neat and smooth, improving the overall aesthetics of the packaging bag 1. It should be noted that when the bag opening fold is provided, the flap 40 should be detachably connected to the bag body 2.

[0050] Alternatively, in one feasible implementation, such as Figure 5 As shown, the packaging bag 1 also includes a handle 50 fixedly disposed around the bag opening, thereby making the packaging bag 1 easy to carry during use.

[0051] Regarding the connection method between the handle 50 and the bag body 2, in one embodiment, both the bag body 2 and the handle 50 are made of non-woven fabric, and the side wall of the bag opening is heat-sealed to the end of the handle 50. Alternatively, the bag body 2 and the handle 50 are made of paper, and the side wall of the bag opening is glued to the end of the handle 50. This utility model does not make specific limitations in this regard.

[0052] The following is a further explanation of how the flip cover 40 is set up.

[0053] Alternatively, in one feasible implementation, the flap 40 is integrally formed with the top edge of a front 10, which can make the connection between the flap 40 and the bag body 2 stronger and avoid the risk of the flap 40 and the bag body 2 detaching during the use of the packaging bag 1.

[0054] Alternatively, in another feasible embodiment, the flap 40 is detachably attached to the top of a front 10. When the bag 1 does not need to be closed during use, the flap 40 can be removed from the bag body 2, so that the bag opening is always open. Therefore, this type of bag 1 also has the advantage of wide applicability.

[0055] Optionally, in one feasible embodiment, the inner sidewall of the flip cover 40 is provided with a fixing member 410 extending along the width direction L. In the width direction L, the two ends of the fixing member 410 extend out of the two ends of the flip cover 40 and are fixedly connected to the sidewalls of the corresponding fixing parts 400.

[0056] When the flip cover 40 is in the closed state, the flip cover 40 is in contact with the outer wall of the other front 10, and the fixing parts 400 at both ends of the flip cover 40 are flipped around their respective side 20 in the height direction H and fixed to the side wall of the front 10 through the fixing parts 410.

[0057] Specifically, when the flip cover 40 is in the closed state, the fixing parts 400 at both ends of the flip cover 40 are fixed to the side wall of one front surface 10 through the fixing parts 410, so that the fixing parts 400 at both ends of the flip cover 40 are not easy to detach from the side wall of one front surface 10. As a result, after the inner wall of the flip cover 40 is attached to the outer wall of the other front surface 10, the flip cover 40 is not easy to loosen during the use of this packaging bag 1, thus ensuring the reliability of the use of this packaging bag 1.

[0058] It should be understood that when the flap 40 is flipped around the width direction L to close the bag opening, the flap 40 is folded at least once around the width direction L. In the process of using this packaging bag 1, in order to further improve the sealing performance of the bag body 2, when it is necessary to keep the bag opening in a closed state, the inner wall surface of the flap 40 can be attached to the outer wall surface of the other front surface 10, and then the flap 40 and the top of the pair of front surfaces 10 can be folded together, and then the fixing parts 400 at both ends of the flap 40 can be fixed to the outer wall surface of one front surface 10 by the fixing parts 410.

[0059] The following provides a further explanation of the location of the fixed component 410.

[0060] Optionally, such as Figure 1 As shown, in one feasible embodiment, when the bag opening is closed, and it is necessary to glue the two front faces 10 together by the fixing member 410 to ensure the airtightness of the bag body 2, the two ends of the fixing member 410 extend and are respectively disposed on the inner sidewall of the corresponding fixing part 400.

[0061] Optionally, in one feasible implementation, when the bag opening is closed, it is necessary to press another front face 10 onto one front face 10 by means of the fixing member 410 so that the two front faces 10 fit together and facilitate opening the bag opening, the two ends of the two fixing members 410 are respectively extended and disposed on the inner sidewall of the corresponding fixing part 400.

[0062] The structure and arrangement of the fixing component 410 are not limited. The following will provide further explanation of the structure and arrangement of the fixing component 410.

[0063] Optionally, in one feasible embodiment, the fixing member 410 is configured as a plastic part disposed on the side wall of the flap 40 along the width direction L, and when the flap 40 is flipped around the width direction L to close the bag opening, the flap 40 is in contact with another front face 10, and the two ends of the plastic part drive their respective corresponding fixing parts 400 to flip around the height direction H and snap onto the side wall surface of one front face 10.

[0064] Specifically, when the fixing part 410 is made into a plastic part and the bag opening is in the closed state, the corresponding fixing parts 400 are snapped onto the side wall of a front 10 through the two ends of the plastic part, thereby fixing the flap 40 relative to the bag body 2; when the flap 40 needs to be opened, it can be opened by detaching the plastic part from the side wall of a front 10; therefore, by making the fixing part 410 into a plastic part, it has the advantage of making it easy to open or close the bag opening.

[0065] It should be understood that the plastic part is made of a material that can undergo plastic deformation and has high fatigue strength, such as sheet-like structures made of iron sheets, flexible steel sheets or other non-metallic materials, etc. This embodiment does not limit it.

[0066] Optionally, in one feasible embodiment, the fixing member 410 is configured as an adhesive member disposed on the side wall of the flap 40 along the width direction L, and when the flap 40 is flipped around the width direction L to close the bag opening, the flap 40 is attached to another front face 10 and fixedly bonded by the adhesive member, the fixing parts 400 at both ends of the flap 40 drive the two ends of their respective adhesive members to flip around the height direction H, and the fixing parts 400 are attached to the outer wall surface of one front face 10 and fixedly bonded by the two ends of the adhesive member.

[0067] Specifically, when the fixing part 410 is set as an adhesive part, when closing the bag opening, the flap 40 is first attached to another front 10 and fixedly bonded by the adhesive part. Then, the fixing parts 400 at both ends of the flap 40 are fixedly bonded to the outer wall of one front 10 by the adhesive part. This makes the connection strength between the flap 40 and the bag body 2 higher, and the adhesive part bonding method also makes the flap 40 better at sealing the bag opening.

[0068] It should be understood that the adhesive can be double-sided tape, Velcro, etc.; this embodiment does not limit it.

[0069] The following provides a further explanation of the connection method between the fixing part 400 and the bag body 2.

[0070] Optionally, in one feasible implementation, the outer wall surface of a front 10 is provided with a pair of limiting openings 420 corresponding to the ends of the fixing parts 400 at both ends of the flip cover 40. When the flip cover 40 is in the closed state, the end of each fixing part 400 extends into its corresponding limiting opening 420.

[0071] Specifically, by setting a limiting opening 420, when the flap 40 is in the closed state, after the end of each fixing part 400 is inserted into its corresponding limiting opening 420, on the one hand, the end of the fixing part 400 will not protrude from the outer wall surface of the front 10, thus making the bag body 2 more aesthetically pleasing; on the other hand, the limiting opening 420 can limit the fixing part 400, fixing it relative to the outer wall surface of the front 10, thereby fixing the flap 40 and the bag body 2 relatively, ensuring the safety and reliability of using this packaging bag 1.

[0072] It should be noted that, in the height direction H, the height dimension of the limiting opening 420 is equal to the width dimension of the fixing part 400 in the height direction H. This reduces the risk that the fixing part 400 will come out of the limiting opening 420 when the bag body 2 shakes after the end of the fixing part 400 extends into the limiting opening 420.

[0073] Specifically, there are no restrictions on how the limit opening 420 is set.

[0074] In one embodiment, a pair of limiting openings 420 are configured as a pair of linear openings extending along the height direction H. When the flap 40 is in the closed state, the end of each fixing part 400 bypasses its corresponding side 20 and then extends into its corresponding linear opening, thereby limiting the fixing part 400; and, since the opening size of the linear opening is small, it has less impact on the appearance of the bag body 2, thus making the packaging bag 1 more aesthetically pleasing.

[0075] Specifically, an arc segment is formed between the adjacent peripheral edges of the linear opening. When the bag 2 carries items, the side wall of the front 10 is subjected to gravity. Since an arc segment is formed between the adjacent peripheral edges of the linear opening, the stress between the adjacent peripheral edges of the linear opening can be dispersed through the arc segment, reducing the risk of the front 10 being torn at the linear opening.

[0076] Alternatively, in another feasible implementation, the limiting opening 420 is a pair of arc-shaped openings. Since the opening area of ​​the arc-shaped openings is larger, the end of the fixing part 400 is more convenient to extend into the arc-shaped openings.

[0077] The above description illustrates the implementation of this utility model through specific embodiments. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model is presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details are included in the above description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0078] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0079] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0080] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0081] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

Claims

1. A packaging bag, characterized in that, The bag includes a bag body comprising a pair of front surfaces opposite each other in the thickness direction, a pair of side surfaces opposite each other in the width direction, and a bottom surface disposed at the bottom of the bag body along the height direction, wherein the pair of front surfaces and the pair of side surfaces surround the top of the bag body to form a bag opening; wherein, One of the pair of front faces has a flap at its top that can be flipped around the width direction, and both ends of the flap have fixing portions that protrude from the bag body along the width direction; wherein, The flap flips relative to the top of one of the front sides around the width direction to switch between a closed state where the bag opening is closed and an open state where the bag opening is exposed; and when the flap is in the closed state, the inner wall surface of the flap is in contact with the outer wall surface of the other of the pair of front sides, and the fixing parts at both ends of the flap flip around the height direction to bypass their respective corresponding side surfaces and are fixed to the outer wall surface of one of the front sides.

2. The packaging bag as described in claim 1, characterized in that, The flip cover is integrally formed with the top edge of the front side; or, The flip cover is detachably attached to the top of one of the front faces.

3. The packaging bag as described in claim 1, characterized in that, The inner sidewall of the flip cover is provided with a fixing member extending along the width direction. In the width direction, both ends of the fixing member extend beyond both ends of the flip cover and reach the sidewall of their respective fixing portions, where they are fixedly connected. When the flip cover is in the closed state, the flip cover is in contact with the outer wall of the other front side, and the fixing parts at both ends of the flip cover are flipped around the corresponding side side in the height direction and fixed to the side wall of the other front side through the fixing parts.

4. The packaging bag as described in claim 3, characterized in that, When the flap is flipped to close the bag opening in the width direction, the flap is folded at least once in the width direction.

5. The packaging bag as described in claim 4, characterized in that, in, The fixing component is configured as a malleable part disposed on the side wall of the flap along the width direction, and when the flap is flipped around the width direction to close the bag opening, the flap is in contact with the other front side, and the two ends of the malleable part drive their respective corresponding fixing parts to flip around the height direction and engage with the side wall surface of the one front side; or, The fixing component is configured as an adhesive piece disposed on the side wall of the flap along the width direction. When the flap is flipped around the width direction to close the bag opening, the flap is attached to the other front side and fixedly bonded by the adhesive piece. The fixing parts at both ends of the flap drive the two ends of the corresponding adhesive pieces to flip around the height direction. The fixing parts are attached to the outer wall of one front side and fixedly bonded by the two ends of the adhesive piece.

6. The packaging bag as described in claim 4, characterized in that, in Both ends of the fixing component extend and are respectively disposed on the inner / outer wall of the corresponding fixing part.

7. The packaging bag as described in claim 4, characterized in that, The outer wall surface of one front side is provided with a pair of limiting openings corresponding to the ends of the fixing parts at both ends of the flip cover. When the flip cover is in the closed state, the end of each fixing part extends into its corresponding limiting opening.

8. The packaging bag as described in claim 7, characterized in that, The pair of limiting openings are configured as a pair of linear openings extending along the height direction.

9. The packaging bag according to any one of claims 1-8, characterized in that, The packaging bag also includes a handle that is fixedly installed around the opening of the bag.

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