Plastic packaging bag with one-way exhaust structure

Abstract

The utility model relates to the technical field of plastic products, concretely is a kind of plastic packaging bag with one-way exhaust structure, including plastic packaging bag body, the surface of plastic packaging bag body is adhesively connected with fixed sleeve, the fixed sleeve is sealed and contacted with cover plate by limiting ring, the cover plate is connected with isolation ring by air pipe, isolation ring is contacted with the inner wall of fixed sleeve, cover plate fixedly connected with fixed column, fixed column slidingly connected with connecting plate, connecting plate is elastically connected with fixed column by elastic plastic sheet;The utility model can seal inside fixed sleeve and plastic packaging bag body by the insertion of sealing rubber ring and sealing groove, the position of movable air hole is moved by the sliding of air pipe to carry out one-way exhaust operation, the cover plate is subjected to elastic force by elastic plastic sheet, so that sealing rubber ring and sealing groove are always closely inserted, so that the device can maintain sealing property for a long time, so that the problem that plastic packaging bag body can produce air leakage when being placed for a long time is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of plastic products technology, specifically a plastic packaging bag with a one-way venting structure. Background Technology

[0002] Plastic packaging bags are packaging bags made of plastic as raw material, used in the production of various daily necessities. They are widely used in daily life and industrial production. In order to maintain the internal airtightness, some packaging bags usually have one-way sealing components installed on the surface to improve the airtightness.

[0003] Chinese patent CN223267403U discloses a plastic packaging bag with venting, sealing, and moisture-proof features. The bag includes a bag body with a storage cavity and an opening. Sealing strips are located on two membranes on either side of the opening. The bag body also has a venting assembly containing a one-way valve A, a one-way valve B, and an air bladder. One-way valve A connects to the storage cavity, and one-way valve B connects the air bladder to the outside air. The air bladder draws air from the storage cavity and releases it to the outside. This plastic packaging bag, through its venting structure with an air bladder and its moisture-proof and absorbent air inlet design, actively vents and ventilates the interior air after the bag opening is closed. The outer second cavity can expand to protect the contents. A starch drying feature at the bag opening absorbs moisture that leaks in during sealing, slowing down the rate of internal moisture absorption. It is suitable for various sealed and moisture-proof packaging of items and food.

[0004] However, the starch drying function at the bag opening in the aforementioned patent only provides a temporary solution. Once the plastic bag is left for an extended period, the starch drying function gradually becomes ineffective, leaving the contents of the bag still at risk of moisture and failing to effectively solve the air leakage problem. Therefore, this invention proposes a plastic bag with a one-way venting structure to address the aforementioned issues. Summary of the Invention

[0005] The purpose of this invention is to provide a plastic packaging bag with a one-way venting structure to solve the problem mentioned in the background art that plastic packaging bags still leak air over a long period of time.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a plastic packaging bag with a one-way exhaust structure, comprising: a plastic packaging bag body, a fixing sleeve adhered to the surface of the plastic packaging bag body, a cover plate sealed to the fixing sleeve by a limiting ring, an isolation ring connected to the cover plate by a vent pipe, the isolation ring contacting the inner wall of the fixing sleeve, a fixing post fixedly connected to the cover plate, a connecting plate slidably connected to the fixing post, and the connecting plate elastically connected to the fixing post by an elastic plastic sheet.

[0007] Preferably, the upper surface of the plastic packaging bag body is sealed to the fixing sleeve, the other end of the fixing sleeve is fixedly connected to the limiting ring, the limiting ring has a sealing groove on the side away from the plastic packaging bag body, and the inner arc surface of the limiting ring is in contact with the cover plate.

[0008] Preferably, the cover plate is circular, and a sealing ring is fixedly connected to the arc surface of the cover plate. The sealing ring is inserted into the sealing groove in a sealed manner. The middle position of the cover plate is fixedly connected to the fixing post, and the side of the cover plate near the plastic packaging bag body is fixedly connected to the vent pipe.

[0009] Preferably, the surface of the vent tube has several through-holes, which are arranged in a uniform circular pattern. An isolation ring is fixedly connected to the side of the vent tube near the plastic packaging bag body, and the outer arc surface of the isolation ring contacts the inner wall of the fixing sleeve.

[0010] Preferably, the inner wall of the fixing sleeve is fixedly connected to both ends of the connecting plate, and two symmetrically arranged elastic plastic sheets are fixedly connected to the side of the connecting plate near the plastic packaging bag body.

[0011] Preferably, the surface of the fixing column has a through groove, the inner wall of the groove contacts both sides of the connecting plate, and the end of the elastic plastic sheet away from the connecting plate contacts the inner wall of the groove. Compared with the prior art, This invention seals the interior of the fixing sleeve and the plastic packaging bag body by inserting a sealing ring into a sealing groove. The position of the air hole can be moved by sliding the vent tube to perform one-way venting. The elastic plastic sheet allows the cover plate to be subjected to elastic force, so that the sealing ring and the sealing groove are always tightly inserted. Thus, the device can maintain its airtightness for a long time, thereby effectively solving the problem of air leakage that may occur in the plastic packaging bag body when it is left for a long time. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the fixing sleeve of this utility model; Figure 3 This is a schematic diagram of the cover plate of this utility model located on one side of the fixing sleeve; Figure 4 This is a cross-sectional view of the cover plate of this utility model.

[0013] In the diagram: 1. Plastic packaging bag body; 2. Fixing sleeve; 3. Limiting ring; 4. Sealing groove; 5. Cover plate; 6. Sealing ring; 7. Vent pipe; 8. Air hole; 9. Isolation ring; 10. Fixing post; 11. Slide groove; 12. Connecting plate; 13. Elastic plastic sheet. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Please see Figures 1 to 4 This utility model provides a technical solution: a plastic packaging bag with a one-way exhaust structure, comprising: a fixing sleeve 2 fixed to the surface of the plastic packaging bag body 1, a filter screen fixedly connected to the surface of the plastic packaging bag body 1, the diameter of the filter screen being the same as that of the fixing sleeve 2, the filter screen being fixedly connected to the fixing sleeve 2, the filter screen preventing material inside the plastic packaging bag body 1 from entering the fixing sleeve 2, the upper surface of the plastic packaging bag body 1 being sealed to the fixing sleeve 2, the other end of the fixing sleeve 2 being fixedly connected to a limiting ring 3, the limiting ring 3 having a sealing groove 4 on the side away from the plastic packaging bag body 1, the sealing groove 4 facilitating the sealing of the fixing sleeve 2, and the inner arc surface of the limiting ring 3 contacting the cover plate 5.

[0016] The cover plate 5 is circular, and a sealing ring 6 is fixedly connected to the arc surface of the cover plate 5. The sealing ring 6 is inserted into the sealing groove 4 in a sealed manner. At this time, the external gas is isolated by the sealing ring 6, preventing it from entering the fixed sleeve 2. The middle position of the cover plate 5 is fixedly connected to the fixed post 10. When the cover plate 5 moves, the fixed post 10 moves accordingly. The side of the cover plate 5 near the plastic packaging bag body 1 is fixedly connected to the vent pipe 7. The vent pipe 7 facilitates the discharge of gas from the plastic packaging bag body 1. The surface of the vent pipe 7 has several through-holes 8, which are evenly arranged in a circle. The gas in the plastic packaging bag body 1 can be quickly discharged through the vent holes 8. An isolation ring 9 is fixedly connected to the side of the vent pipe 7 near the plastic packaging bag body 1. When the cover plate 5 moves, the vent pipe 7 moves accordingly. When the vent pipe 7 moves, it can be limited by the contact between the isolation ring 9 and the limiting ring 3 to prevent it from falling out. The outer arc surface of the isolation ring 9 contacts the inner wall of the fixed sleeve 2.

[0017] The inner wall of the fixing sleeve 2 is fixedly connected to both ends of the connecting plate 12. The connecting plate 12 is a rigid component, which provides a limiting function for the fixing post 10 and allows the elastic plastic sheet 13 to quickly generate elastic force. Two symmetrically arranged elastic plastic sheets 13 are fixedly connected to the side of the connecting plate 12 near the plastic packaging bag body 1. The included angle between the extension lines of the two elastic plastic sheets 13 is an obtuse angle. A through groove 11 is opened on the surface of the fixing post 10. The inner wall of the groove 11 contacts both sides of the connecting plate 12. The end of the elastic plastic sheet 13 away from the connecting plate 12 contacts the inner wall of the groove 11. When the fixing post 10 moves, it will squeeze the elastic plastic sheet 13. At this time, the elastic force of the gradually bent elastic plastic sheet 13 will gradually increase, which facilitates the reset of the fixing post 10.

[0018] In its natural state, the sealing ring 6 is inserted into the sealing groove 4, and the vent 8 is located inside the fixing sleeve 2. When it is necessary to vent the plastic packaging bag body 1, the inlet of the plastic packaging bag body 1 is sealed, and then the plastic packaging bag body 1 is squeezed. At this time, the air pressure inside the plastic packaging bag body 1 increases, and the air pressure begins to press the cover plate 5. At this time, the cover plate 5 slides outward, which drives the fixing column 10 and the isolation ring 9 to move synchronously. When the vent pipe 7 moves, the vent 8 moves accordingly. When the vent 8 is connected to the outside, the gas inside the plastic packaging bag body 1 can be discharged. During this process, the elastic plastic sheet 13 is squeezed by the fixing column 10 to generate elasticity. After the gas inside the plastic packaging bag body 1 is discharged, the cover plate 5 begins to reset under the action of the elastic plastic sheet 13 until the sealing ring 6 is re-inserted into the sealing groove 4, thereby completing the one-way venting.

[0019] When this device is working, the inside of the fixing sleeve 2 and the plastic packaging bag body 1 can be sealed by the insertion of the sealing ring 6 and the sealing groove 4. The position of the air hole 8 can be moved by the sliding of the vent pipe 7 to perform one-way exhaust operation. The elastic plastic sheet 13 can make the cover plate 5 subject to elastic force, so that the sealing ring 6 and the sealing groove 4 are always tightly inserted, thus ensuring that the plastic packaging bag body 1 can still maintain its airtightness when placed for a long time.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic packaging bag having a one-way exhaust structure, characterized by comprising: include: A plastic packaging bag body (1) is attached to a fixing sleeve (2) on its surface. The fixing sleeve (2) is sealed to a cover plate (5) by a limiting ring (3). The cover plate (5) is connected to an isolation ring (9) by a vent pipe (7). The isolation ring (9) is in contact with the inner wall of the fixing sleeve (2). The cover plate (5) is fixedly connected to a fixing post (10). The fixing post (10) is slidably connected to a connecting plate (12). The connecting plate (12) is elastically connected to the fixing post (10) by an elastic plastic sheet (13).

2. The plastic packaging bag with one-way exhaust structure according to claim 1, characterized in that: The upper surface of the plastic packaging bag body (1) is sealed to the fixing sleeve (2), and the other end of the fixing sleeve (2) is fixedly connected to the limiting ring (3). The limiting ring (3) has a sealing groove (4) on the side away from the plastic packaging bag body (1), and the inner arc surface of the limiting ring (3) is in contact with the cover plate (5).

3. A plastic packaging bag with a one-way venting structure according to claim 1, characterized in that: The cover plate (5) is circular, and a sealing ring (6) is fixedly connected to the arc surface of the cover plate (5). The sealing ring (6) is inserted into the sealing groove (4) in a sealed manner. The middle position of the cover plate (5) is fixedly connected to the fixing post (10). The side of the cover plate (5) near the plastic packaging bag body (1) is fixedly connected to the vent pipe (7).

4. A plastic packaging bag with a one-way venting structure according to claim 1, characterized in that: The surface of the vent tube (7) is provided with several through-holes (8), and the several holes (8) are arranged in a circular and uniform manner. An isolation ring (9) is fixedly connected to the side of the vent tube (7) near the plastic packaging bag body (1), and the outer arc surface of the isolation ring (9) is in contact with the inner wall of the fixing sleeve (2).

5. A plastic packaging bag with a one-way venting structure according to claim 1, characterized in that: The inner wall of the fixing sleeve (2) is fixedly connected to both ends of the connecting plate (12), and two symmetrically arranged elastic plastic sheets (13) are fixedly connected to the side of the connecting plate (12) near the plastic packaging bag body (1).

6. A plastic packaging bag with a one-way venting structure according to claim 1, characterized in that: The surface of the fixed column (10) is provided with a through groove (11). The inner wall of the groove (11) contacts both sides of the connecting plate (12), and the end of the elastic plastic sheet (13) away from the connecting plate (12) contacts the inner wall of the groove (11).

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