Double-layer food packaging bag

Abstract

The utility model relates to the technical field of food packaging, in particular to a double-layer food packaging bag which comprises a paper bag body, an exhaust assembly and a sealing assembly, the paper bag body comprises a sealing part and a storage part, and the sealing assembly is used for sealing the sealing part; the exhaust assembly comprises a sealing ring, a sealing block, a fixing shell and a spring, a through hole is formed in the paper bag body, the sealing ring is arranged on the paper bag body, the fixing shell is arranged on the sealing ring, the sealing ring, the sealing block and the spring are all arranged in the fixing shell, one end of the spring abuts against the inner wall of the fixing shell, and the other end of the spring abuts against the inner wall of the sealing block. A plurality of exhaust holes are formed in the fixing block, and the sealing block abuts against the sealing ring in a sealed mode through a spring. According to the packaging bag, air in the packaging bag can be extruded out through extrusion, and external air is difficult to enter the packaging bag through the exhaust assembly.

Description

Technical Field

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

[0002] Food packaging bags are a type of packaging design. In order to preserve and store food in life, product packaging bags are produced. Food packaging bags refer to film containers that are in direct contact with food and are used to hold and protect food.

[0003] At present, the Chinese utility model patent application with the publication date of November 03, 2023 and the publication number of CN219949082U proposes a baked food packaging bag, which relates to the technical field of packaging bags, including a packaging bag body, a bag mouth is fixed on the upper end of the packaging bag body, a drawstring is arranged on the side of the bag mouth, a venting tube is fixed on the side of the drawstring, the venting tube is connected to the packaging bag body, a sealing plug is plugged on the venting tube, the sealing plug is a rubber plug, and a cover plate is fixed on the end of the sealing plug. After the baked food is placed in the packaging bag body, the bag mouth is fixed with the drawstring, and then the sealing plug is opened, and the venting tube can be used to achieve ventilation, so that the heat of the baked food can be dissipated, and the water vapor generated by the heat of the baked food in the packaging bag body is reduced, which is more conducive to the storage of the baked food; before loading the baked food, the name and price of the food are written on the label paper, and then the label paper is inserted into the label interlayer, so as to facilitate the display of food information and make it more convenient for others to purchase.

[0004] However, when the above-mentioned food packaging bag is ventilated, outside air can enter the packaging bag through the vent pipe. Although this can improve the cooling effect, it will affect the preservation effect of the packaging bag on the food and easily cause the food in the packaging bag to become damp and deteriorate. Summary of the invention

[0005] The utility model provides a double-layer food packaging bag, which can improve the technical problem in the related art that when the food packaging bag is ventilated, outside air can enter the packaging bag, thus affecting the preservation effect of the packaging bag.

[0006] The embodiment of the present application provides a double-layer food packaging bag, comprising:

[0007] A paper bag body, an exhaust assembly and a sealing assembly, wherein the paper bag body comprises a sealing portion and a storage portion, and the sealing assembly is used to seal the sealing portion;

[0008] The exhaust component includes a sealing ring, a sealing block, a fixed shell and a spring. A through hole is opened on the storage part. The sealing ring is arranged on the paper bag body. The fixed shell is arranged on the sealing ring. The sealing ring, the sealing block and the spring are all arranged in the fixed shell. One end of the spring abuts against the inner wall of the fixed shell, and the other end is arranged on the sealing block. A plurality of exhaust holes are opened on the fixed shell. The sealing block abuts against the sealing ring through a spring seal.

[0009] The above-mentioned technical scheme in the embodiment of the present application has at least the following technical effects: when the packaging bag needs to be vented, the packaging bag is squeezed, the pressure inside the packaging bag increases, the gas in the packaging bag generates an extrusion force on the sealing ring through the through hole, the sealing block moves in the direction away from the sealing ring, the spring is compressed, and the gas in the packaging bag flows into the shell from the gap between the sealing block and the sealing ring, and then flows out from the exhaust hole. After the pressure of the gas in the packaging bag is relatively balanced with that of the outside air, the sealing block moves in the direction close to the sealing ring under the elastic force of the spring until it abuts against the sealing ring, making it difficult for outside air to flow into the shell from the gap between the sealing block and the sealing ring; therefore, the setting of the sealing ring, the sealing block, the fixed shell and the spring makes it difficult for outside gas to flow into the shell from the gap between the sealing block and the sealing ring when the user vents the packaging bag, thereby improving the preservation effect of the packaging bag on food.

[0010] A double-layer food packaging bag provided in an embodiment of the present application can expel the gas in the packaging bag by squeezing the packaging bag, and can pass through the exhaust component to make it difficult for external gas to flow into the packaging bag from the gap between the sealing block and the sealing ring, thereby improving the preservation effect of the packaging bag on food.

[0011] In some embodiments, a first abutting surface is obliquely provided on the inner side of the sealing ring, and a second abutting surface is obliquely provided at the bottom edge of the sealing block, and the first abutting surface abuts against the second abutting surface.

[0012] In some embodiments, a waterproof layer is disposed on the outer side of the paper bag body, and a plastic layer is disposed on the inner side.

[0013] In some embodiments, the sealing portion includes a first sealing edge and a second sealing edge, the sealing assembly includes a sealing strip, a first connecting plate, a first sealing plate, a second sealing plate and a second connecting plate, the sealing strip is arranged on the first sealing edge through the first connecting plate, the first sealing plate and the second sealing plate are both arranged on the second sealing edge through the second connecting plate, and a sealing cavity for forming a seal with the sealing strip is formed between the first sealing plate, the second sealing plate and the second connecting plate.

[0014] In some embodiments, a cover body for blocking the exhaust hole is sleeved on the fixed shell, and the cover body is clamped on the fixed shell through a clamping assembly.

[0015] In some embodiments, the clamping assembly includes a first limit block and a second limit block, the first limit block is arranged on the outer side wall of the fixed shell, the second limit block is arranged on the inner side wall of the cover body, and the first limit block abuts against the second limit block.

[0016] In some embodiments, both the first sealing edge and the second sealing edge are provided with a carrying hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a double-layer food packaging bag provided in an embodiment of the present application;

[0019] Figure 2 This is an exploded view of the exhaust assembly;

[0020] Figure 3 is a cross-sectional view of an exhaust assembly;

[0021] Figure 4 For along Figure 1 The cross-sectional structure diagram along the AA line;

[0022] Figure 5 for Figure 4 Enlarged view of part B in the middle.

[0023] Among them, the reference numerals in the figure are:

[0024] 10. Paper bag body; 11. Storage part; 111. Through hole; 12. Sealing part; 121. First sealing edge; 122. Second sealing edge; 123. Hand hole; 13. Waterproof layer; 14. Plastic layer; 20. Exhaust assembly; 21. Sealing ring; 211. First abutting surface; 22. Sealing block; 221. Second abutting surface; 23. Fixed shell; 231. Exhaust hole; 24. Spring; 25. Cover; 30. Sealing assembly; 31. Sealing strip; 32. First connecting plate; 33. First sealing plate; 34. Second sealing plate; 35. Second connecting plate; 36. Sealing cavity; 40. Snap-fit ​​assembly; 41. First limiting block; 42. Second limiting block. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships; for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] It should be noted that, in the present application, words such as "in some embodiments", "exemplarily", "for example", etc. are used to indicate examples, illustrations or descriptions. Any embodiment or design described in the present application as "in some embodiments", "exemplarily", "for example" should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "in some embodiments", "exemplarily", "for example", etc. is intended to present related concepts in a concrete way, meaning that specific features, structures or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the above words in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] Food packaging bags are a type of packaging design. In order to preserve and store food in life, product packaging bags are produced. Food packaging bags refer to film containers that are in direct contact with food and are used to hold and protect food.

[0033] However, when the existing food packaging bags with ventilation function are ventilated, outside air can enter the packaging bag through the ventilation tube. Although this can improve the cooling effect, it will affect the preservation effect of the packaging bag on the food and easily cause the food in the packaging bag to become damp and deteriorate.

[0034] Based on this, in order to improve the technical problem in the related art that when the food packaging bag is ventilated, outside air can enter the interior of the packaging bag, affecting the preservation effect of the packaging bag, the embodiment of the present application provides the following solution.

[0035] Optionally, please also refer to Figures 1 to 5 The embodiment of the present application provides a double-layer food packaging bag, including a paper bag body 10, an exhaust assembly 20 and a sealing assembly 30, wherein the paper bag body 10 includes a sealing portion 12 and a storage portion 11, and the sealing assembly 30 is used to seal the sealing portion 12;

[0036] The exhaust assembly 20 includes a sealing ring 21, a sealing block 22, a fixed shell 23 and a spring 24. The paper bag body 10 is provided with a through hole 111. The sealing ring 21 is arranged on the paper bag body 10. The fixed shell 23 is arranged on the sealing ring 21. The sealing ring 21, the sealing block 22 and the spring 24 are all arranged in the fixed shell 23. One end of the spring 24 abuts against the inner wall of the fixed shell 23, and the other end is arranged on the sealing block 22. A plurality of exhaust holes 231 are provided on the fixed shell 23. The sealing block 22 is sealed against the sealing ring 21 through the spring 24.

[0037] As can be seen from the above, in a double-layer food packaging bag provided by an embodiment of the present application, when the packaging bag needs to be vented, the packaging bag is squeezed, the pressure in the packaging bag increases, and the gas in the packaging bag generates an extrusion force on the sealing ring 21 through the through hole 111, and the sealing block 22 moves in a direction away from the sealing ring 21, the spring 24 is compressed, and the gas in the packaging bag flows into the shell from the gap between the sealing block 22 and the sealing ring 21, and then flows out from the exhaust hole 231. After the pressure of the gas in the packaging bag is relatively balanced with that of the outside air, the sealing block 22 moves in a direction close to the sealing ring 21 under the elastic force of the spring 24 until it is sealed against the sealing ring 21, so that it is difficult for the outside air to flow into the shell from the gap between the sealing block 22 and the sealing ring 21; therefore, the setting of the sealing ring 21, the sealing block 22, the fixed shell 23 and the spring 24 makes it difficult for the outside gas to flow into the shell from the gap between the sealing block 22 and the sealing ring 21 when the user vents the packaging bag, thereby improving the preservation effect of the packaging bag on food.

[0038] Optionally, see Figures 2 to 3 A first abutting surface 211 is obliquely provided on the inner side of the sealing ring 21 , and a second abutting surface 221 is obliquely provided at the bottom edge of the sealing block 22 , and the first abutting surface 211 abuts against the second abutting surface 221 .

[0039] With such arrangement, after the packaging bag is squeezed to exhaust air, the sealing block 22 moves toward the sealing ring 21 under the elastic force of the spring 24 until the first abutting surface 211 and the second abutting surface 221 abut against each other, making it difficult for outside air to flow into the shell from the gap between the first abutting surface 211 and the second abutting surface 221; therefore, the arrangement of the first abutting surface 211 and the second abutting surface 221 can increase the contact area between the sealing block 22 and the sealing ring 21, thereby increasing the sealing effect and making it difficult for the sealing block 22 to generate friction with the sealing ring 21 during movement, which is beneficial to the long-term use of the sealing block 22 and the sealing ring 21.

[0040] Optionally, see Figures 4 to 5 The outer side of the paper bag body 10 is provided with a waterproof layer 13, and the inner side is provided with a plastic layer 14.

[0041] With such arrangement, the built-in plastic layer 14 can increase the support of the packaging bag. When water vapor is generated in the packaging bag or the external humidity is high, the paper bag body 10 is not easily in contact with water under the protection of the waterproof layer 13 arranged on both sides of the paper bag body 10. When paper contacts water, the fiber network of the paper will expand, causing its strength to decrease. Therefore, the arrangement of the waterproof layer 13 and the plastic layer 14 increases the durability of the paper bag body 10.

[0042] Optionally, see Figures 4 to 5The sealing portion 12 includes a first sealing edge 121 and a second sealing edge 122, and the sealing assembly 30 includes a sealing strip 31, a first connecting plate 32, a first sealing plate 33, a second sealing plate 34 and a second connecting plate 35. The sealing strip 31 is arranged on the first sealing edge 121 through the first connecting plate 32, and the first sealing plate 33 and the second sealing plate 34 are both arranged on the second sealing edge 122 through the second connecting plate 35. A sealing cavity 36 for forming a seal with the sealing strip 31 is formed between the first sealing plate 33, the second sealing plate 34 and the second connecting plate 35.

[0043] With such arrangement, when sealing the paper bag body 10, the sealing strip 31 is placed on the first sealing plate 33 and the second sealing plate 34, and the sealing strip 31 is pressed in the direction close to the first sealing plate 33 and the second sealing plate 34, so that the sealing strip 31 is squeezed into the sealing cavity 36. The first sealing plate 33 and the second sealing plate 34 clamp the sealing strip 31 under the action of their own elasticity, thereby forming a seal on the opening of the storage cavity 111. When the user needs to open the paper bag, the first sealing edge 121 and the second sealing edge 122 move in directions away from each other, and the ends of the first sealing plate 33 and the second sealing plate 34 away from the second connecting plate 35 move in directions away from each other under the action of their own elasticity, so that the sealing strip 31 is separated from the sealing cavity 36, and the sealing portion of the paper bag can be opened. Therefore, the arrangement of the sealing strip 31, the first sealing plate 33 and the second sealing plate 34 facilitates the user to seal the storage cavity 111, and the operation is simple and convenient.

[0044] Optionally, see Figure 3 The fixed shell 23 is sleeved with a cover body 25 for blocking the exhaust hole 231 , and the cover body 25 is clamped on the fixed shell 23 through a clamping assembly 40 .

[0045] With such a configuration, when exhaust is not required, the cover body 25 can be mounted on the fixed shell 23 to block the exhaust hole 231 , making it difficult for the gas in the packaging bag to be discharged from the exhaust hole 231 . Therefore, the cover body 25 is configured to block the exhaust hole 231 .

[0046] Optionally, see Figures 2 to 3 The clamping assembly 40 includes a first limit block 41 and a second limit block 42. The first limit block 41 is arranged on the outer side wall of the fixed shell 23, and the second limit block 42 is arranged on the inner side wall of the cover body 25. The first limit block 41 abuts against the second limit block 42.

[0047] With such arrangement, when it is necessary to take out the cover body 25, the cover body 25 is pulled, the first limit block 41 abuts against the second limit block 42, and the first limit block 41 and the second limit block 42 abutting against each other are compressed until the cover body 25 is taken out; when it is necessary to put back the cover body 25, the cover body 25 is pressed, the first limit block 41 abuts against the second limit block 42, and the handle is continued to be pressed, the first limit block 41 and the second limit block 42 are compressed until the cover body 25 is installed; when the packaging bag shakes due to carrying during daily use, the first limit block 41 abuts against the second limit block 42, so that the cover body 25 is clamped on the fixed shell 23, and it is difficult to detach from the fixed shell 23, thereby making it difficult for the cover body 25 to fall off during daily use.

[0048] Optionally, see Figures 1 to 4 The first sealing edge 121 and the second sealing edge 122 are both provided with a carrying hole 123 .

[0049] With such a configuration, when the paper bag body 10 needs to be carried, the user can pick up the paper bag body 10 through the hand hole 123 for carrying, which is simple and convenient to operate, and a layer of plastic ring can be provided at the hand hole 123 to reduce the probability of paper tearing at the hand hole 123 when the user picks up the paper bag body 10 through the hand hole 123, thereby increasing the service life of the paper bag. The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A double-layer food packaging bag, characterized in that: The invention comprises a paper bag body (10), an exhaust assembly (20) and a sealing assembly (30), wherein the paper bag body (10) comprises a sealing portion (12) and a storage portion (11), and the sealing assembly (30) is used for sealing the sealing portion (12); The exhaust assembly (20) comprises a sealing ring (21), a sealing block (22), a fixed shell (23) and a spring (24); a through hole (111) is provided on the storage portion (11); the sealing ring (21) is arranged on the paper bag body (10); the fixed shell (23) is arranged on the sealing ring (21); the sealing ring (21), the sealing block (22) and the spring (24) are all arranged in the fixed shell (23); one end of the spring (24) abuts against the inner wall of the fixed shell (23); the other end is arranged on the sealing block (22); a plurality of exhaust holes (231) are provided on the fixed shell (23); the sealing block (22) is sealed against the sealing ring (21) through the spring (24).

2. A double-layer food packaging bag according to claim 1, characterized in that: A first abutting surface (211) is obliquely provided on the inner side of the sealing ring (21), and a second abutting surface (221) is obliquely provided at the bottom edge of the sealing block (22), and the first abutting surface (211) abuts against the second abutting surface (221).

3. A double-layer food packaging bag according to claim 2, characterized in that: The outer side of the paper bag body (10) is provided with a waterproof layer (13), and the inner side is provided with a plastic layer (14).

4. A double-layer food packaging bag according to claim 3, characterized in that: The sealing portion (12) comprises a first sealing edge (121) and a second sealing edge (122); the sealing assembly (30) comprises a sealing strip (31), a first connecting plate (32), a first sealing plate (33), a second sealing plate (34) and a second connecting plate (35); the sealing strip (31) is arranged on the first sealing edge (121) via the first connecting plate (32); the first sealing plate (33) and the second sealing plate (34) are both arranged on the second sealing edge (122) via the second connecting plate (35); a sealing cavity (36) for forming a seal with the sealing strip (31) is formed between the first sealing plate (33), the second sealing plate (34) and the second connecting plate (35).

5. A double-layer food packaging bag according to any one of claims 1 to 4, characterized in that: The fixed shell (23) is sleeved with a cover body (25) for blocking the exhaust hole (231); the cover body (25) is clamped on the fixed shell (23) via a clamping assembly (40).

6. A double-layer food packaging bag according to claim 5, characterized in that: The clamping assembly (40) comprises a first limit block (41) and a second limit block (42); the first limit block (41) is arranged on the outer side wall of the fixed shell (23); the second limit block (42) is arranged on the inner side wall of the cover body (25); the first limit block (41) and the second limit block (42) are in abutment with each other.

7. A double-layer food packaging bag according to claim 4, characterized in that: The first sealing edge (121) and the second sealing edge (122) are both provided with a carrying hole (123).

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