Plastic packaging box with good sealing performance
Through multiple sealing designs and a precise locking structure, the problem of insufficient sealing performance of plastic packaging boxes is solved, achieving efficient sealing effect and stability, simplifying the operation process, and improving user experience and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI YANLAI PHOTOELECTRIC TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-15
AI Technical Summary
Existing plastic packaging boxes have insufficient sealing performance, making it difficult to effectively prevent the penetration of small molecules such as smoke and water vapor. Furthermore, the sealing structure is prone to aging and wear, failing to meet the requirements of high-sealing applications.
It adopts a multi-seal design, including a combination of elastic seals, slide rods, screws and nuts. Through the precise engagement and threaded connection between the box door and the connecting plate, the box door can be quickly fixed and released, ensuring that the sealing strip fits tightly and enhancing the sealing effect.
It effectively prevents smoke penetration, improves sealing and stability, simplifies operation procedures, increases work efficiency, ensures long-term airtight performance, and enhances user safety and convenience.
Smart Images
Figure CN224241678U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic packaging box technology, and in particular to a plastic packaging box with good sealing performance. Background Technology
[0002] In modern industry and daily life, plastic packaging boxes are widely used in various fields such as food, medicine, and electronics due to their advantages of low cost, high plasticity, and light weight. Especially in scenarios where high airtightness is required, such as storing food that is easily affected by moisture and spoilage, or storing electronic components that are sensitive to the environment, the airtightness of plastic packaging boxes is directly related to the quality and safety of the product.
[0003] Traditional plastic packaging boxes typically use a simple snap-on or flip-top structure for sealing, achieving closure through the simple fastening of the box body and lid edges. Some packaging boxes with sealing functions often have a single-layer sealing strip along the edge of the lid. The pressure when the lid and box body fasten together causes the sealing strip to deform and fill any gaps, thus achieving a certain sealing effect. In addition, some packaging boxes also use a threaded engagement method, where the box body and lid are tightened together to achieve a seal.
[0004] However, existing plastic packaging boxes typically use single-layer sealing strips, which are difficult to prevent the penetration of small molecules such as smoke and moisture. Single-layer sealing strips are prone to aging and wear after long-term use, making it difficult to maintain a tight fit and leading to seal failure. Snap-on or threaded structures are also difficult to make completely seamless, allowing harmful substances such as smoke to easily seep into the box and damage the contents, thus failing to meet the needs of scenarios with high sealing requirements. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a plastic packaging box with good sealing performance, aiming to improve the problem that existing plastic packaging boxes usually use a single-layer sealing strip, which is difficult to deal with the penetration of small molecules such as smoke and water vapor.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a plastic packaging box with good sealing performance, comprising a packaging box body, a box door rotatably connected to the inner wall of the packaging box body, a connecting plate provided on one side of the outer wall of the box door, and a sealing component provided inside the connecting plate;
[0007] The sealing assembly includes an elastic seal, the outer wall of which is slidably connected to the interior of the connecting plate. A sealing strip is fixedly connected to the outer wall of the connecting plate. A limit plate is fixedly connected to the outer wall of the elastic seal, and a propulsion assembly is provided inside the elastic seal.
[0008] Furthermore, the propulsion assembly includes a slide rod, one end of which is fixedly connected to the interior of the elastic seal, and a spring is sleeved on the outer wall of the slide rod.
[0009] Furthermore, the box door has a slot inside, and a positioning plate is fixedly connected to one side of the outer wall of the connecting plate. The outer wall of the positioning plate is slidably connected to the inside of the slot. Both the box door and the positioning plate have threaded holes inside, and a fixing component is provided inside the box door.
[0010] Furthermore, the fixing component includes a screw, the outer wall of which is slidably connected to the inside of the box door, the middle part of which is slidably connected to the inside of the connecting plate, and nuts threadedly connected to both ends of the screw, with washers provided between the nuts and the box door.
[0011] Furthermore, the screw is disposed inside the threaded hole, which is used to position the screw.
[0012] Furthermore, the outer wall of the slide rod is slidably connected to the inside of the connecting plate, and the slide rod is used to guide the extension and retraction of the spring.
[0013] Furthermore, one end of the spring is fixedly connected to the inside of the elastic seal, and the other end of the spring is fixedly connected to the inside of the connecting plate.
[0014] Furthermore, the outer wall of the limiting plate is slidably connected to the inside of the connecting plate, and the limiting plate is used to limit the movement of the elastic seal.
[0015] This utility model has the following beneficial effects:
[0016] 1. In this utility model, when the box door is closed, the connecting plates on both sides fit tightly together, and the sealing strip effectively seals the gaps, forming a solid smoke barrier that effectively prevents smoke from penetrating and spreading. At the same time, the elastic sealing element moves flexibly under the push of the sliding rod, stably and evenly fitting the outer wall of the connecting plate, further enhancing the sealing effect and providing reliable sealing protection for the packaging box.
[0017] 2. In this utility model, the cooperation between the drive nut and the screw enables the rapid fixing and releasing of the connecting plate, simplifying the operation process and saving time and effort. The precise engagement design of the positioning plate and the slot ensures accurate installation and positioning of the connecting plate, reducing human error and improving the stability and sealing of the box door. This allows users to quickly complete operations during inspection, maintenance, or replacement of parts, significantly improving work efficiency and facilitating daily maintenance and management. It also ensures that the packaging box maintains good sealing performance for a long time, bringing users greater security and convenience. Attached Figure Description
[0018] Figure 1This is a three-dimensional structural diagram of a plastic packaging box with good sealing performance proposed in this utility model;
[0019] Figure 2 This is a schematic diagram of one side of the packaging box body of a plastic packaging box with good sealing performance proposed in this utility model;
[0020] Figure 3 This is a schematic diagram of one side of the connecting plate structure of a plastic packaging box with good sealing performance proposed in this utility model.
[0021] Figure 4 This is a schematic diagram of one side of the door structure of a plastic packaging box with good sealing performance proposed in this utility model.
[0022] Legend:
[0023] 1. Packaging box body; 2. Box door; 3. Connecting plate; 4. Sealing strip; 5. Elastic seal; 6. Limiting plate; 7. Sliding rod; 8. Spring; 9. Positioning plate; 10. Slot; 11. Threaded hole; 12. Screw; 13. Nut; 14. Washer. Detailed Implementation
[0024] 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.
[0025] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a plastic packaging box with good sealing performance, including a packaging box body 1, a box door 2 rotatably connected to the inner wall of the packaging box body 1, a connecting plate 3 provided on one side of the outer wall of the box door 2, and a sealing component provided inside the connecting plate 3.
[0026] The sealing assembly includes an elastic seal 5, the outer wall of which is slidably connected to the inside of the connecting plate 3, a sealing strip 4 is fixedly connected to the outer wall of the connecting plate 3, a limit plate 6 is fixedly connected to the outer wall of the elastic seal 5, and a propulsion assembly is provided inside the elastic seal 5.
[0027] Specifically, when the box door 2 is closed, the connecting plates 3 on both sides quickly and tightly fit together, causing the sealing strip 4 to work efficiently and effectively seal the gaps between the connecting plates 3, forming a solid barrier to prevent smoke and other substances from penetrating and spreading. At the same time, the slide rod 7 pushes the elastic sealing element 5 to move flexibly between the connecting plates 3, making it stably and evenly fit against the outer wall of the connecting plates 3. The multiple sealing design further enhances the overall airtightness of the packaging box.
[0028] Reference Figure 1 and Figure 3 The propulsion assembly includes a slide rod 7, one end of which is fixedly connected to the inside of the elastic seal 5. A spring 8 is sleeved on the outer wall of the slide rod 7. A slot 10 is opened inside the box door 2. A positioning plate 9 is fixedly connected to one side of the outer wall of the connecting plate 3. The outer wall of the positioning plate 9 is slidably connected to the inside of the slot 10. Threaded holes 11 are opened inside both the box door 2 and the positioning plate 9. A fixing assembly is provided inside the box door 2. The fixing assembly includes a screw 12. The outer wall of the screw 12 is slidably connected to the inside of the box door 2. The middle part of the outer wall of the screw 12 is slidably connected to the inside of the connecting plate 3. Both ends of rod 12 are threaded with nuts 13. A washer 14 is provided between the nut 13 and the box door 2. The screw 12 is located inside the threaded hole 11, which is used to position the screw 12. The outer wall of the slide rod 7 is slidably connected to the inside of the connecting plate 3. The slide rod 7 is used to guide the extension and retraction of the spring 8. One end of the spring 8 is fixedly connected to the inside of the elastic seal 5, and the other end of the spring 8 is fixedly connected to the inside of the connecting plate 3. The outer wall of the limiting plate 6 is slidably connected to the inside of the connecting plate 3. The limiting plate 6 is used to limit the movement of the elastic seal 5.
[0029] Specifically, the drive nut 13 can move flexibly at both ends of the screw 12, allowing for simple fixing and releasing of the connecting plate 3 without complicated steps, saving significant time and effort. The precise engagement design between the positioning plate 9 and the slot 10 provides stable positioning for the connecting plate 3, greatly reducing installation errors caused by human factors. This not only ensures the stability of the box door 2 but also guarantees its sealing effect. In practical applications, when the packaging box needs inspection, maintenance, or parts replacement, users can quickly complete the operation thanks to the above structural design, significantly improving work efficiency and ensuring its long-term good sealing performance.
[0030] Working principle: When the plastic packaging box is needed, when the box door 2 is closed, the connecting plates 3 on both sides are quickly and tightly fitted together, and the sealing strip 4 can work efficiently. The presence of the sealing strip 4 can effectively seal the gap between the two connecting plates 3, forming a strong barrier to prevent the penetration and diffusion of smoke. In addition, the use of the elastic sealing element 5 further enhances the sealing effect. By pushing the slide rod 7, the elastic sealing element 5 moves flexibly between the connecting plates 3, thereby ensuring that it can be stably and evenly fitted to the outer wall of the connecting plate 3. The multiple sealing designs not only enhance the overall airtightness of the plastic packaging box;
[0031] Furthermore, by driving the nut 13 to move flexibly at both ends of the screw 12, the connecting plate 3 can be easily fixed and released without spending a lot of time and effort on complicated operation steps. During installation, the precise engagement design between the positioning plate 9 and the slot 10 ensures the stable positioning of the connecting plate 3, reduces errors caused by human factors, and ensures the stability and sealing of the box door 2. Therefore, when maintenance, repair, or replacement of parts is required, users can quickly complete the operation, greatly improving work efficiency. At the same time, it also provides strong support for the daily maintenance and management of plastic packaging boxes, ensuring that they can maintain good sealing performance for a long time, further enhancing the user's sense of security and convenience.
[0032] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are 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 plastic packaging box with good sealing performance, comprising a packaging box body (1), characterized in that: The inner wall of the packaging box body (1) is rotatably connected to a box door (2), and a connecting plate (3) is provided on one side of the outer wall of the box door (2). A sealing component is provided inside the connecting plate (3). The sealing assembly includes an elastic seal (5), the outer wall of which is slidably connected to the inside of the connecting plate (3), a sealing strip (4) is fixedly connected to the outer wall of the connecting plate (3), a limiting plate (6) is fixedly connected to the outer wall of the elastic seal (5), and a propulsion assembly is provided inside the elastic seal (5).
2. The plastic packaging box with good sealing performance according to claim 1, characterized in that: The propulsion assembly includes a slide rod (7), one end of which is fixedly connected to the inside of the elastic seal (5), and a spring (8) is sleeved on the outer wall of the slide rod (7).
3. A plastic packaging box with good sealing performance according to claim 1, characterized in that: The box door (2) has a slot (10) inside. A positioning plate (9) is fixedly connected to one side of the outer wall of the connecting plate (3). The outer wall of the positioning plate (9) is slidably connected to the inside of the slot (10). Both the box door (2) and the positioning plate (9) have threaded holes (11) inside. The box door (2) has a fixing component inside.
4. A plastic packaging box with good sealing performance according to claim 3, characterized in that: The fixing component includes a screw (12), the outer wall of which is slidably connected to the inside of the box door (2), the middle part of the outer wall of which is slidably connected to the inside of the connecting plate (3), and both ends of the screw (12) are threaded with nuts (13), and a washer (14) is provided between the nut (13) and the box door (2).
5. A plastic packaging box with good sealing performance according to claim 4, characterized in that: The screw (12) is disposed inside the threaded hole (11), which is used to position the screw (12).
6. A plastic packaging box with good sealing performance according to claim 2, characterized in that: The outer wall of the slide rod (7) is slidably connected to the inside of the connecting plate (3), and the slide rod (7) is used to guide the extension and retraction of the spring (8).
7. A plastic packaging box with good sealing performance according to claim 2, characterized in that: One end of the spring (8) is fixedly connected to the inside of the elastic seal (5), and the other end of the spring (8) is fixedly connected to the inside of the connecting plate (3).
8. A plastic packaging box with good sealing performance according to claim 2, characterized in that: The outer wall of the limiting plate (6) is slidably connected to the inside of the connecting plate (3), and the limiting plate (6) is used to limit the movement of the elastic seal (5).