A packaging bag with a sealing structure

Abstract

The utility model discloses a kind of packaging bags with sealing structure, including bag body and bag mouth, sealing strip is provided on bag mouth, manually air pump device is provided on bag body, manually air pump device includes pump body base, flexible pump membrane, air inlet check valve and exhaust check valve, pump body base is fixed on the outer wall of bag body, flexible pump membrane covers on pump body base, air inlet and exhaust are opened on pump body base, air inlet check valve and exhaust check valve are provided on pump body base;The utility model has the function of convenient discharge of air in bag and establishment of negative pressure environment, alleviate the problem that food is easily oxidized and deteriorated due to internal residual air of conventional sealing bag, so that user does not need to rely on any external tool after completing sealing, only needs to repeatedly press air pump device to create negative pressure environment, greatly improve the convenience, significantly improve the preservation effect, and the device can be integrated with bag body Production, simple and reliable structure.

Description

Technical Field

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

[0002] Packaging bags, such as plastic stand-up pouches, aluminum foil bags, and composite film bags, are widely used in various industries due to their advantages such as low cost, light weight, ease of transportation, and printing. For products that are not disposable, the resealability of packaging bags is crucial, as it directly affects the shelf life, ease of use, and storage safety of the contents.

[0003] For example, patent number CN219858400U discloses a self-sealing packaging bag for self-made products, including a bag body. Fixing blocks are provided on both sides of the top of the bag body. A strip and a post are respectively provided on one side of each fixing block, and a connecting block is fixedly installed on the top of the two fixing blocks. The combined use of support blocks, a wear-resistant layer, partitions, and storage blocks effectively increases the wear resistance and support performance of the inner surface of the bag. It also allows for easy identification of the contents while categorizing and storing the self-made products inside, making it less likely for the self-made products stored inside to wear or puncture the bag, thus effectively extending the service life of the packaging bag and improving its usability. The combined use of fixing blocks, strips, posts, Velcro, connecting blocks, grooves, and circular slots provides a double and tight seal for the bag body, while also facilitating user access for storage. This effectively improves the sealing performance and, consequently, the quality of the self-made products stored inside the bag.

[0004] For example, patent number CN221520555U discloses a packaging bag with a sealing structure, including a bag body, a fixing frame installed at the top of the bag body, an mounting base installed at one end of the fixing frame, and lifting ropes installed at both ends of the bag body. A handle is fitted around the outside of each lifting rope. A sealing cap is snapped onto the top of the mounting base via an installation mechanism. A sealing ring is embedded at the bottom of the sealing cap. The installation mechanism includes a spring-loaded component and a retraction component. The spring-loaded component is used to press and fix the sealing cap, and the retraction component is used to release the pressure on the sealing cap. The spring-loaded component includes a pressure plate installed on one side of the sealing cap, a pressure block installed at the bottom of the pressure plate, and a pressure groove that engages with the pressure block at the top of the mounting base. This utility model has a simple structure and is easy to operate; the sealing operation can be completed simply by pressing down, and it can be reused.

[0005] Regarding the above description, the applicant believes that the following problems exist: Although the current sealed packaging bags achieve convenient press-to-seal and reusability, their sealing purpose is mainly to prevent the contents from spilling and external dust from entering. They cannot effectively solve the problem of preserving perishable items such as food. The air remaining inside the bag can still cause the contents to oxidize and deteriorate, resulting in limited preservation capabilities. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a packaging bag with a sealing structure. By integrating a manual negative pressure preservation structure, users can easily extract the air inside the bag after sealing, thereby effectively delaying the oxidation and deterioration of the contents and significantly improving the preservation effect.

[0007] The objective of this utility model is achieved through the following technical solution:

[0008] A packaging bag with a sealing structure includes a bag body and a bag opening. A sealing strip is provided on the bag opening. A manual air pump device is provided on the bag body. The manual air pump device includes a pump body base, a flexible pump membrane, an inlet one-way valve, and an exhaust one-way valve. The pump body base is fixed to the outer wall of the bag body. The flexible pump membrane covers the pump body base. An air inlet and an exhaust outlet are provided on the pump body base. The inlet one-way valve and the exhaust one-way valve are provided on the pump body base.

[0009] In one optional embodiment, the outer periphery of the flexible pump diaphragm is sealed to the pump body base and together form a closed pump chamber. The air inlet is connected to the pump chamber through an air inlet check valve, and the exhaust port is connected to the pump chamber through an exhaust check valve.

[0010] In one alternative embodiment, the air inlet is located on the side of the pump body base and leads to the interior of the bag, while the exhaust outlet is located on the other side of the pump body base and leads to the outside atmosphere.

[0011] In one alternative embodiment, a manual air pump is positioned near the bag opening.

[0012] In one optional embodiment, the intake check valve and the exhaust check valve are diaphragm-type check valves.

[0013] In one alternative embodiment, the sealing strip is a zipper-type sealing strip.

[0014] In one alternative embodiment, the flexible pump membrane has an outward protrusion in its central region, and the flexible pump membrane is made of an elastic polymer material.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. By integrating a manual air pump, the structure enables convenient air removal and the establishment of a negative pressure environment inside the bag. This alleviates the problem of food oxidation and spoilage caused by residual air inside conventional sealed bags. After sealing, users can create a negative pressure environment simply by repeatedly pressing the air pump after sealing, without the need for any external tools. This greatly improves ease of use and significantly enhances the preservation effect.

[0017] 2. Through a compact air pump structure consisting of a pump body base, a flexible pump membrane, and two one-way valves, a low-cost and highly reliable one-way air extraction function is achieved, alleviating the problem of complex structure and high cost in existing technologies for achieving vacuum preservation. It achieves the beneficial effect of efficient negative pressure preservation with almost no increase in cost. The device can be produced as an integrated unit with the bag body, and its structure is simple and reliable. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a packaging bag with a sealing feature. Figure 1 ;

[0019] Figure 2 A schematic diagram of the structure of a packaging bag with a sealing feature. Figure 2 ;

[0020] Figure 3 A schematic diagram of the structure of a packaging bag with a sealing feature. Figure 3 ;

[0021] Figure 4 A schematic diagram of the structure of a packaging bag with a sealing feature. Figure 4 .

[0022] In the diagram: 1. Bag body; 2. Bag opening; 3. Sealing strip; 4. Manual air pump device; 41. Pump body base; 42. Flexible pump membrane; 43. Inlet check valve; 44. Exhaust check valve; 45. Air inlet; 46. Exhaust outlet. Detailed Implementation

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0024] Please refer to Figure 1-4A packaging bag with a sealing structure includes a bag body 1 and a bag opening 2. A sealing strip 3 is provided on the bag opening 2. A manual air pump device 4 is provided on the bag body 1. The manual air pump device 4 includes a pump body base 41, a flexible pump membrane 42, an inlet one-way valve 43, and an exhaust one-way valve 44. The pump body base 41 is fixed to the outer wall of the bag body 1. The flexible pump membrane 42 covers the pump body base 41. An air inlet 45 and an exhaust outlet 46 are provided on the pump body base 41. The inlet one-way valve 43 and the exhaust one-way valve 44 are provided on the pump body base 41.

[0025] In a preferred embodiment of this utility model, the outer periphery of the flexible pump membrane 42 is sealed to the pump body base 41 and together form a closed pump cavity. The air inlet 45 is connected to the pump cavity through the air inlet one-way valve 43, and the exhaust port 46 is connected to the pump cavity through the exhaust one-way valve 44. This helps to ensure the airtightness of the pump cavity and provides a closed space for forming a unidirectional airflow.

[0026] In a preferred embodiment of this utility model, the air inlet 45 is located on the side of the pump body base 41 and leads to the interior of the bag body 1, while the exhaust port 46 is located on the other side of the pump body base 41 and leads to the outside atmosphere, which helps to prevent fingers from blocking the exhaust during operation.

[0027] In a preferred embodiment of this utility model, the manual air pump device 4 is located near the bag opening 2, so that the user can operate it with one hand to pump air after sealing.

[0028] In a preferred embodiment of this utility model, the intake check valve 43 and the exhaust check valve 44 are diaphragm check valves. These valves have a simple structure, are sensitive, and have low opening and closing pressure, making them very suitable for manual operation and effectively ensuring unidirectional gas flow.

[0029] In a preferred embodiment of this utility model, the sealing strip 3 is a zipper-type sealing strip, which is beneficial to provide a reliable and repeatedly openable and closeable seal for the bag opening 2, and is the basis for forming and maintaining negative pressure inside the bag.

[0030] In a preferred embodiment of this utility model, the flexible pump membrane 42 has an outward protrusion in the central area. The flexible pump membrane 42 is made of elastic polymer material. The protrusion serves to guide and reinforce the pressing point, while the elasticity of the material ensures that the flexible pump membrane 42 can automatically rebound and reset after pressing, providing power for continuous pumping.

[0031] When using this device, first, place the item into the bag and seal the bag opening 2 with the zippered sealing strip 3. Then, the user repeatedly presses the flexible pump membrane 42 of the manual air pump device 4 with their finger. When pressed down, the pump chamber volume decreases and the air pressure increases, forcing the exhaust one-way valve 44 to open and the intake one-way valve 43 to close. The air in the chamber is discharged into the atmosphere through the exhaust port 46. When released, the flexible pump membrane 42 rebounds due to its own elasticity, and the pump chamber volume increases to form a negative pressure. At this time, the exhaust one-way valve 44 closes and the intake one-way valve 43 opens, and the air in the bag is drawn into the pump chamber. By repeating this operation, the air in the bag can be continuously extracted, and finally the bag 1 tightly wraps the item, forming an effective negative pressure preservation environment.

[0032] Although only certain components and embodiments of this application have been illustrated and described, many modifications and alterations (e.g., variations in the size, dimensions, structure, shape and proportion of the various elements, installation arrangement, material use, color, orientation, etc.) will be conceived by those skilled in the art without actually departing from the scope and spirit of the claims.

[0033] Finally, it should be noted that the above embodiments are only preferred embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A packaging bag with a sealing structure, comprising a bag body (1) and a bag opening (2), wherein a sealing strip (3) is provided on the bag opening (2), characterized in that: A manual air pump device (4) is provided on the bag body (1). The manual air pump device (4) includes a pump body base (41), a flexible pump membrane (42), an air inlet check valve (43), and an air outlet check valve (44). The pump body base (41) is fixed on the outer wall of the bag body (1). The flexible pump membrane (42) covers the pump body base (41). An air inlet (45) and an air outlet (46) are provided on the pump body base (41). An air inlet check valve (43) and an air outlet check valve (44) are provided on the pump body base (41). The outer periphery of the flexible pump diaphragm (42) is sealed to the pump body base (41) and together they form a closed pump chamber. The air inlet (45) is connected to the pump chamber through the air inlet check valve (43), and the exhaust port (46) is connected to the pump chamber through the exhaust check valve (44).

2. A packaging bag with a sealing structure according to claim 1, characterized in that: The air inlet (45) is located on the side of the pump body base (41) and leads to the inside of the bag body (1). The exhaust port (46) is located on the other side of the pump body base (41) and leads to the outside atmosphere.

3. A packaging bag with a sealing structure according to claim 1, characterized in that: The manual air pump device (4) is located near the bag opening (2).

4. A packaging bag with a sealing structure according to claim 1, characterized in that: The intake check valve (43) and the exhaust check valve (44) are diaphragm check valves.

5. A packaging bag with a sealing structure according to claim 1, characterized in that: The sealing strip (3) is a pull-lock type sealing strip.

6. A packaging bag with a sealing structure according to claim 1, characterized in that: The flexible pump membrane (42) has an outward protrusion in the central region and is made of an elastic polymer material.

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