Leak-proof food packaging bag

Abstract

This utility model discloses a leak-proof food packaging bag, relating to the field of food packaging. It includes a bag body with a winding assembly on its side wall and an inflation assembly at its bottom. The winding assembly includes a winding rod fixedly connected to the side wall of the bag body, with folding members fixedly connected to both the front and rear sides of the winding rod, each folding member containing a soft iron sheet. The inflation assembly includes an airbag fixedly connected to the bottom of the bag body, with an inflation bag fixedly connected to the inner wall of the bag body. The outer walls of the inflation bag are completely flush with the inner walls of the bag body. A one-way air nozzle is fixedly connected to the top of the airbag and is fixedly connected to the bottom of the inflation bag. An exhaust pipe is fixedly connected to the front of the inflation bag, passing through the bag body and extending outwards, with a sealing plug at the front end of the exhaust pipe. This utility model, through its triple-sealing structure of self-sealing strip, winding assembly, and inflation assembly, significantly improves the leak-proof performance of the packaging bag, effectively preventing leakage of liquids, powders, or gases.

Description

Technical Field

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

[0002] As a key carrier in the storage and transportation of food, the sealing and leak-proof performance of food packaging bags directly affects the shelf life and quality of food. Currently, most food packaging bags on the market use a single self-sealing strip or rope-tying sealing structure, which has a poor secondary sealing effect after opening. This is especially true for foods containing liquids or that are susceptible to moisture, which are prone to leakage, moisture absorption and spoilage.

[0003] Meanwhile, after some food is removed from existing food packaging bags, the remaining space inside the bag increases, which not only makes it easy for outside air and moisture to enter, but also causes damage due to shaking and collision of the food inside the bag during carrying or transportation. Although some packaging bags are equipped with roll-up structures, they can only achieve simple volume reduction and cannot form multiple leak-proof protections in conjunction with the sealing structure. Furthermore, they lack protective designs for the food inside the bag, making it difficult to meet users' dual needs for food storage safety and convenience.

[0004] Therefore, it is necessary to invent a leak-proof food packaging bag to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a leak-proof food packaging bag to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a leak-proof food packaging bag, comprising a bag body, wherein a winding assembly is provided on the side wall of the bag body, and an inflation assembly is provided at the bottom of the bag body; The winding assembly includes a winding rod fixedly connected to the side wall of the bag body, and folding parts are fixedly connected to both the front and rear sides of the winding rod, with soft iron sheets inside the folding parts. The inflation assembly includes an airbag fixedly connected to the bottom of the bag body, an inflation bag fixedly connected to the inner wall of the bag body, the outer walls of the inflation bag being completely fitted to the inner walls of the bag body, a one-way air nozzle fixedly connected to the top of the airbag, the one-way air nozzle being fixedly connected to the bottom of the inflation bag, and an exhaust pipe fixedly connected to the front side of the inflation bag, the exhaust pipe passing through the bag body and extending outward, with a sealing plug at the front end of the exhaust pipe.

[0007] Preferably, the bag body has a self-sealing strip at the bag opening.

[0008] Preferably, the outer wall of the winding rod has a winding groove corresponding to the bag body.

[0009] Preferably, the outer wall of the winding rod has two annular grooves, and a handle is provided in both annular grooves. Both ends of the handle are provided with annular strips.

[0010] Preferably, the side wall of the sealing plug is fixedly connected to a connecting strap, and the other end of the connecting strap is fixedly connected to the front side of the bag body.

[0011] The technical effects and advantages of this utility model are as follows: 1. By setting up a triple sealing structure of self-sealing strip, winding assembly and inflation assembly, the self-sealing strip achieves initial sealing of the bag opening; the winding assembly rolls up the excess part of the bag into the winding groove by rotating the winding rod, and the soft iron sheet in the folding part can fix the winding shape to achieve secondary sealing; after winding, the distance of the upper inflation bag is shortened, and after inflation, the four sides fit together to form a third seal. Multiple protections greatly improve the leak-proof performance of the packaging bag and effectively avoid leakage of liquid, powder or gas.

[0012] 2. The air bag in the inflation component fits completely against the inner wall of the bag. After inflation, the lower air bag forms an elastic support structure, which can cushion and protect the food inside the bag, preventing the food from breaking or deforming due to external pressure during carrying or storage. It is especially suitable for storing fragile foods such as potato chips and biscuits, as well as liquid foods such as sauces. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 A front view structural diagram; Figure 3 This utility model Figure 2 A schematic diagram of the AA-direction cross-section structure; Figure 4 This utility model Figure 1 A schematic diagram of the enlarged structure of part B; Figure 5 This utility model Figure 3 A schematic diagram of the enlarged structure of part C; Figure 6 This utility model Figure 3 A schematic diagram of the enlarged structure of part D; Figure 7 This is a schematic diagram of the structure of the winding rod of this utility model; Figure 8 This is a schematic diagram of the handle of this utility model.

[0014] In the diagram: 1. Bag body; 2. Winding assembly; 21. Winding rod; 22. Folding component; 3. Inflation assembly; 31. Airbag; 32. Inflatable bag; 33. One-way valve; 34. Exhaust pipe; 35. Sealing plug; 4. Self-sealing strip; 5. Winding groove; 6. Annular groove; 7. Handle; 8. Annular belt; 9. Connecting belt. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides, for example Figure 1-8 The leak-proof food packaging bag shown includes a bag body 1, a winding assembly 2 provided on the side wall of the bag body 1, and an inflation assembly 3 provided at the bottom of the bag body 1. The winding assembly 2 includes a winding rod 21 fixedly connected to the side wall of the bag body 1. Folding parts 22 are fixedly connected to both the front and rear sides of the winding rod 21. The folding parts 22 contain soft iron sheets. The soft iron sheets can be bent at will and maintain their shape, which is convenient for fixing the bag body 1 after winding. By rotating the winding rod 21, the excess part of the bag body 1 is wound around the winding rod 21, and the bag body 1 can be wound up. The bag body 1 after winding can achieve secondary sealing, further increasing the leak-proof effect of the bag body 1. The inflation component 3 includes an airbag 31 fixedly connected to the bottom of the bag body 1. The airbag 31 is made of elastic rubber and has good airtightness. An inflation bag 32 is fixedly connected to the inner wall of the bag body 1. The inflation bag 32 is made of food-grade silicone, which is soft and non-toxic. The outer walls of the inflation bag 32 are completely fitted to the inner walls of the bag body 1. A one-way air nozzle 33 is fixedly connected to the top of the airbag 31. The one-way air nozzle 33 is fixedly connected to the bottom of the inflation bag 32. An exhaust pipe 34 is fixedly connected to the front of the inflation bag 32. The exhaust pipe 34 is made of plastic, with one end connected to the inside of the inflation bag 32 and the other end passing through the bag body 1 and extending outward. The exhaust pipe 34 extends outward through the bag body 1. A sealing plug 35, made of rubber, is inserted at the front end of the exhaust pipe 34 to ensure airtightness. Through the airbag 31 and the inflatable bag 32, and because the bag body 1 is wound around by the winding rod 21, the inflatable bags 32 on the upper side are close together. Therefore, when inflating, the four sides of the inflatable bags 32 on the upper side will contact each other, thereby achieving a triple seal and further increasing the leak-proof effect of the bag body 1. The inflatable bags 32 on the lower side will protect the food inside the bag body 1, preventing the food from being squeezed and damaged.

[0017] A self-sealing strip 4 is provided at the opening of the bag body 1. The self-sealing strip 4 has a concave-convex interlocking structure, which can initially seal the opening of the bag body 1.

[0018] The outer wall of the winding rod 21 is provided with a winding groove 5 corresponding to the bag body 1, so that the bag body 1 can be taken into the winding groove 5.

[0019] Two annular grooves 6 are provided on the outer wall of the winding rod 21, and a handle 7 is provided in both annular grooves 6. The handle 7 is made of nylon braided material, which is sturdy and durable. Annular straps 8 are provided at the bottom of both ends of the handle 7. By fitting the two annular straps 8 into the two annular grooves 6 respectively, the handle 7 can rotate on the winding rod 21 and is restricted by the annular grooves 6, so that it cannot be removed from the winding rod 21.

[0020] The sealing plug 35 is fixedly connected to the side wall with a connecting strap 9. The other end of the connecting strap 9 is fixedly connected to the front side of the bag body 1. The connecting strap 9 is made of nylon and is glued to the front side of the bag body 1 to prevent the sealing plug 35 from being lost after being pulled out.

[0021] The working principle of this utility model is as follows: First, open the self-sealing strip 4 at the opening of the bag body 1, put the food into the bag body 1, and then close the self-sealing strip 4 to achieve a preliminary seal. After the food part is taken out of the bag body 1, rotate the winding rod 21 to wind the excess part of the bag body 1 into the winding groove 5 of the winding rod 21. After winding, folding parts 22 on both sides of the winding rod 21 are folded towards the bag body 1. The soft iron sheet inside the folding parts 22 maintains the folded shape to fix the wound bag body 1 and achieve a secondary seal. Then, air is injected into the inflation bag 32 through the one-way air nozzle 33. The gas enters the inflation bag 32 through the one-way air nozzle 33, causing the inflation bag 32 to expand. Since the bag body 1 has been wound, the upper part of the inflation bag expands. After inflation, the bag 32 fits snugly together on all sides to form a tight seal, achieving a triple seal. At the same time, the inflatable bag 32 on the lower side provides elastic support for the remaining food inside the bag after inflation, playing a cushioning and protective role to prevent the food from being squeezed and damaged. After inflation, the one-way air nozzle 33 automatically closes to prevent air leakage. When it is time to eat again, the sealing plug 35 is pulled out, and the gas in the inflatable bag 32 is discharged through the exhaust pipe 34. The sealing plug 35 is connected to the bag body 1 through the connecting strap 9 to prevent loss. Then, unfold the folding piece 22, rotate the winding rod 21 in the opposite direction to loosen the bag body 1, and open the self-sealing strip 4 to take out the food. When carrying, it can be conveniently carried through the handle 7, which can rotate around the winding rod 21 for flexible use.

[0022] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof food packaging bag, comprising a bag body, characterized in that: The side wall of the bag is provided with a winding assembly, and the bottom of the bag is provided with an inflation assembly; The winding assembly includes a winding rod fixedly connected to the side wall of the bag body, and folding parts are fixedly connected to both the front and rear sides of the winding rod, with soft iron sheets inside the folding parts. The inflation assembly includes an airbag fixedly connected to the bottom of the bag body, an inflation bag fixedly connected to the inner wall of the bag body, the outer walls of the inflation bag being completely fitted to the inner walls of the bag body, a one-way air nozzle fixedly connected to the top of the airbag, the one-way air nozzle being fixedly connected to the bottom of the inflation bag, and an exhaust pipe fixedly connected to the front side of the inflation bag, the exhaust pipe passing through the bag body and extending outward, with a sealing plug at the front end of the exhaust pipe.

2. The leak-proof food packaging bag according to claim 1, characterized in that: The bag has a self-sealing strip at the opening.

3. A leak-proof food packaging bag according to claim 2, characterized in that: The outer wall of the winding rod has a winding groove corresponding to the bag body.

4. A leak-proof food packaging bag according to claim 3, characterized in that: The outer wall of the winding rod has two annular grooves, and a handle is provided in both annular grooves. Both ends of the handle are provided with annular strips at the bottom.

5. A leak-proof food packaging bag according to claim 4, characterized in that: The sealing plug is fixedly connected to a connecting strap on its side wall, and the other end of the connecting strap is fixedly connected to the front side of the bag body.

Images