Microwaveable disposable plastic packaging box and cover structure thereof

Abstract

The utility model belongs to the technical field of plastic packing box, concretely relates to disposable plastic packing box and lid body structure of microwave heating, a lid body structure, including plastic packing box cover, a plurality of fixed venting slot areas are set up on plastic packing box cover, the upper side of plastic packing box cover is equipped with the baffle that can shield fixed venting slot area, a plurality of and fixed venting slot area one -to -one corresponding movable venting slot area are set up on the baffle, the baffle can be movable on the upper side of plastic packing box cover, to adjust the range of fixed venting slot area shielding of baffle, disposable plastic packing box of microwave heating, including plastic packing box body and lid body structure. The utility model can adjust the steam exhaust efficiency inside packing box according to the different of food, reach the purpose of safe pressure relief, and reduce the influence of food taste caused by excessive loss of water in food inside packing box.

Description

Technical Field

[0001] This utility model belongs to the field of plastic packaging box technology, specifically relating to a microwave-heatable disposable plastic packaging box and its lid structure. Background Technology

[0002] In the food packaging sector, disposable plastic packaging boxes are widely used in takeout and pre-prepared food scenarios due to their advantages such as low cost and portability. Among them, microwaveable types are increasingly used because they can meet consumers' immediate heating needs.

[0003] To prevent excessive internal steam pressure during heating from causing deformation, cracking, or even burns, microwaveable disposable plastic packaging boxes on the market usually have a fixed-size ventilation structure on the lid, such as a single ventilation hole or a fixed ventilation groove.

[0004] However, different foods produce vastly different amounts of steam and require varying levels of moisture retention during microwave heating. For example, liquid or high-moisture foods such as soups and porridge generate a large amount of steam rapidly when heated. If the ventilation structure is too small, the steam cannot escape in time, which can easily cause a sudden increase in pressure inside the container, posing a safety hazard. On the other hand, foods such as rice, steamed buns, and solid dishes need to retain as much internal moisture as possible to maintain their texture. If the ventilation structure is too large, excessive moisture loss will occur, making the food dry and hard, affecting the eating experience.

[0005] Existing fixed ventilation structures struggle to balance the two core requirements of "safe pressure relief" and "moisture retention." Enlarging the ventilation holes to ensure safety sacrifices the texture of the food; conversely, reducing the ventilation holes to retain moisture decreases pressure relief efficiency and increases safety risks. Utility Model Content

[0006] The purpose of this invention is to provide a microwaveable disposable plastic packaging box and its lid structure, which can adjust the steam discharge efficiency inside the packaging box according to different foods, achieve safe pressure relief, and reduce the impact on the taste of food caused by excessive moisture loss inside the packaging box.

[0007] The specific technical solution adopted by this utility model is as follows: A cover structure includes a plastic packaging box cover. The plastic packaging box cover has multiple fixed ventilation slots. A baffle plate is installed on the upper side of the plastic packaging box cover to block the fixed ventilation slots. The baffle plate has multiple movable ventilation slots that are one-to-one with the fixed ventilation slots. The baffle plate can be moved on the upper side of the plastic packaging box cover to adjust the range of the baffle plate blocking the fixed ventilation slots.

[0008] Furthermore, the plurality of fixed vent slot areas are arranged in a circular array with the axis of the plastic packaging box cover as the center, the baffle is a circular plate, and the plurality of movable vent slot areas are arranged in a circular array on the baffle with the center of the baffle as the center, the baffle being rotatably connected to the plastic packaging box cover.

[0009] Furthermore, the fixed venting groove area consists of multiple venting holes formed on the plastic packaging box lid.

[0010] Furthermore, the inner and outer edges of the lower side of the shield are fixedly connected with first annular protrusions, and the plastic packaging box cover is fixedly connected with two first annular grooves that are adapted to the first annular protrusions. The first annular protrusions can be engaged inside the first annular grooves, and the first annular protrusions can rotate inside the first annular grooves.

[0011] Furthermore, the outer walls on both sides of the upper half of the first annular protrusion are compression surfaces, and the upper ends of the two compression surfaces are inclined toward each other. The inner walls on both sides of the first annular groove are provided with a portion of compression inner wall, and the upper ends of the two compression inner walls are inclined toward each other.

[0012] Furthermore, the first annular protrusion ring has a hollow structure.

[0013] A microwave-heatable disposable plastic packaging box includes a plastic packaging box body and a lid structure. An edge body is fixedly connected to the upper side of the outer side of the plastic packaging box body. A second annular groove is fixedly connected to the edge body. A second annular protrusion ring opposite to the second annular groove is fixedly connected to the lower side of the plastic packaging box lid. The second annular protrusion ring can be engaged inside the second annular groove and can rotate inside the second annular groove.

[0014] Furthermore, the second annular protrusion ring has a hollow structure.

[0015] Furthermore, the outer walls on both sides of the upper half of the second annular protrusion are compression surfaces, and the upper ends of the two compression surfaces are inclined toward each other. The inner walls on both sides of the second annular groove are provided with a portion of compression inner wall, and the upper ends of the two compression inner walls are inclined toward each other.

[0016] The technical effects achieved by this utility model are as follows: This utility model discloses a microwave-heatable disposable plastic packaging box and its lid structure. By adjusting the baffle, the area of ​​the effective ventilation zone can be adjusted. This allows the effective ventilation zone area to be adjusted according to different foods. When microwave heating the food inside the packaging box, adjusting the area of ​​the effective ventilation zone can effectively control the steam discharge efficiency inside the packaging box, enabling the steam inside the packaging box to be effectively discharged, achieving the purpose of safe pressure relief, and reducing the impact on the taste of the food caused by excessive moisture loss inside the packaging box. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the structure of this utility model; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a utility model Figure 3 A magnified view of a portion of point A in the middle.

[0018] The attached diagram lists the components represented by each number as follows: 1. Plastic packaging box body; 2. Edge body; 3. Plastic packaging box lid; 4. Baffle plate; 5. Movable ventilation slot area; 6. Ventilation hole; 7. Connecting bracket; 8. Vertical plate; 9. First annular groove; 10. First annular protrusion; 11. Second annular groove; 12. Second annular protrusion. Detailed Implementation

[0019] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0020] like Figures 1-4As shown, a cover structure includes a plastic packaging box cover 3. The plastic packaging box cover 3 has multiple fixed ventilation slots. A baffle plate 4 is installed on the upper side of the plastic packaging box cover 3 to block the fixed ventilation slots. The baffle plate 4 has multiple movable ventilation slots 5 that correspond one-to-one with the fixed ventilation slots. The baffle plate 4 can move on the upper side of the plastic packaging box cover 3 to adjust the range of the fixed ventilation slots it blocks. The overlapping area of ​​the fixed ventilation slots and the movable ventilation slots 5 is the effective ventilation area. By adjusting the baffle plate 4, the area of ​​the effective ventilation area can be adjusted, allowing for adjustments based on the type of food. When microwave heating food inside the packaging box, adjusting the area of ​​the effective ventilation area effectively controls the steam discharge efficiency inside the packaging box, enabling effective steam discharge and achieving safe pressure relief. It also reduces the impact on the taste of the food caused by excessive moisture loss.

[0021] In some embodiments, multiple fixed ventilation slot areas can be arranged in a straight line, the baffle plate 4 can be a strip plate, multiple movable ventilation slot areas 5 are arranged in a straight line on the baffle plate 4, and the baffle plate 4 can slide in a straight line on the plastic packaging box cover 3, so that the baffle plate 4 can adjust the coverage of the fixed ventilation slot areas.

[0022] In other implementations, such as Figures 1-3 As shown, multiple fixed venting slots are arranged in a ring around the axis of the plastic packaging box cover 3. The baffle plate 4 is a ring plate, and multiple movable venting slots 5 are arranged in a ring around the center of the baffle plate 4. The baffle plate 4 is rotatably connected to the plastic packaging box cover 3. By rotating the baffle plate 4, the coverage area of ​​the fixed venting slots can be adjusted. The multiple fixed venting slots are arranged in a ring around the axis of the plastic packaging box cover 3, which allows the fixed venting slots to be evenly distributed on the plastic packaging box cover 3, achieving the purpose of uniform pressure relief. This makes the pressure distribution inside the plastic packaging box more uniform and reduces the deformation of the plastic packaging box caused by excessive local pressure.

[0023] like Figures 1-3 As shown, in some embodiments, the fixed venting groove area consists of multiple venting holes 6 opened on the plastic packaging box cover 3. In this case, the user can block different numbers of venting holes 6 with the baffle plate 4 during use, thereby making it relatively easy to control the opening size of the effective venting area.

[0024] like Figures 1-3 As shown, a connecting bracket 7 is fixedly connected inside the shield 4, and a vertical plate 8 is fixedly connected to the upper side of the connecting bracket 7. The user can easily rotate the shield 4 by manually turning the vertical plate 8.

[0025] like Figures 3-4 As shown, in some embodiments, the shield 4 is rotatably connected to the plastic packaging box cover 3 by having a first annular protrusion 10 fixedly connected to both the inner and outer edges of the lower side of the shield 4. The first annular protrusion 10 is preferably a hollow structure, allowing it to be deformed under pressure. Two first annular grooves 9, adapted to the first annular protrusion 10, are fixedly connected to the plastic packaging box cover 3. The first annular protrusion 10 can be engaged inside the first annular grooves 9, and can rotate within the first annular grooves 9. Figure 4 As shown, the outer walls on both sides of the upper half of the first annular protrusion 10 are compression surfaces, and the upper ends of the two compression surfaces are inclined towards each other. The inner walls on both sides of the first annular groove 9 are provided with a portion of the compression inner wall, and the upper ends of the two compression inner walls are inclined towards each other. When the first annular protrusion 10 enters the interior of the first annular groove 9, the compression surface of the first annular protrusion 10 can be compressed by the compression inner wall of the first annular groove 9, thereby applying a downward force to the first annular protrusion 10, so that the baffle 4 and the plastic packaging box cover 3 fit tightly together.

[0026] like Figures 1-4 As shown, a microwave-heatable disposable plastic packaging box structure includes a plastic packaging box body 1 and a lid structure. An edge body 2 is fixedly connected to the upper outer side of the plastic packaging box body 1, and a second annular groove 11 is fixedly connected to the edge body 2. A second annular protrusion 12, opposite to the second annular groove 11, is fixedly connected to the lower side of the plastic packaging box lid 3. The second annular protrusion 12 is preferably a hollow structure, and can be engaged inside the second annular groove 11, and can rotate inside the second annular groove 11. Figure 4 As shown, similar to the first annular groove 9 and the first annular protrusion 10, the outer walls on both sides of the upper half of the second annular protrusion 12 are compression surfaces. The upper ends of the two compression surfaces are inclined towards each other. The inner walls on both sides of the second annular groove 11 are provided with a portion of compression inner walls. The upper ends of the two compression inner walls are inclined towards each other. When the second annular protrusion 12 enters the interior of the second annular groove 11, the compression surfaces of the second annular protrusion 12 can be compressed by the compression inner walls of the second annular groove 11, thereby applying a downward force to the second annular protrusion 12, so that the plastic packaging box cover 3 and the edge body 2 fit tightly together.

[0027] It should be noted that the plastic packaging box body 1, edge body 2, plastic packaging box lid 3, baffle plate 4, connecting bracket 7, vertical plate 8, first annular groove 9, first annular raised ring 10, second annular groove 11, and second annular raised ring 12 can all be made of food-grade polypropylene (PP). The first annular groove 9, first annular raised ring 10, second annular groove 11, and second annular raised ring 12 can also be made of food-grade elastic PP or thermoplastic elastomer (TPE), allowing the plastic packaging box to be microwaved.

[0028] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A cover structure, characterized in that: The package includes a plastic packaging box cover (3), which has multiple fixed ventilation slots. A shield (4) is installed on the upper side of the plastic packaging box cover (3) to block the fixed ventilation slots. The shield (4) has multiple movable ventilation slots (5) that are one-to-one with the fixed ventilation slots. The shield (4) can move on the upper side of the plastic packaging box cover (3) to adjust the range of the shield (4) blocking the fixed ventilation slots.

2. The cover structure according to claim 1, characterized in that: Multiple fixed vent slot areas are arranged in a ring array with the axis of the plastic packaging box cover (3) as the center. The shielding plate (4) is a ring plate. Multiple movable vent slot areas (5) are arranged in a ring array on the shielding plate (4) with the center of the shielding plate (4) as the center. The shielding plate (4) is rotatably connected to the plastic packaging box cover (3).

3. The cover structure according to claim 2, characterized in that: The fixed venting groove area consists of multiple venting holes (6) opened on the plastic packaging box cover (3).

4. The cover structure according to claim 2, characterized in that: The shield (4) is fixedly connected to a connecting bracket (7), and a vertical plate (8) is fixedly connected to the upper side of the connecting bracket (7).

5. The cover structure according to claim 2, characterized in that: The inner and outer edges of the lower side of the shield (4) are fixedly connected with a first annular protrusion (10). The plastic packaging box cover (3) is fixedly connected with two first annular grooves (9) that are adapted to the first annular protrusion (10). The first annular protrusion (10) can be engaged inside the first annular groove (9), and the first annular protrusion (10) can rotate inside the first annular groove (9).

6. The cover structure according to claim 5, characterized in that: The upper half of the first annular protrusion (10) has two outer walls on both sides that are subjected to compression. The upper ends of the two compressed surfaces are inclined toward each other. The inner walls on both sides of the first annular groove (9) are provided with a portion of the inner wall of compression. The upper ends of the two inner walls of compression are inclined toward each other.

7. The cover structure according to claim 5, characterized in that: The first annular protrusion (10) is a hollow structure.

8. A microwave-heatable disposable plastic packaging box, characterized in that: The device includes a plastic packaging box body (1) and a cover structure according to any one of claims 1-7. An edge body (2) is fixedly connected to the upper side of the outer side of the plastic packaging box body (1). A second annular groove (11) is fixedly connected to the edge body (2). A second annular protrusion (12) opposite to the second annular groove (11) is fixedly connected to the lower side of the plastic packaging box cover (3). The second annular protrusion (12) can be engaged inside the second annular groove (11) and can rotate inside the second annular groove (11).

9. The disposable plastic packaging box according to claim 8, characterized in that: The second annular protrusion (12) has a hollow structure.

10. The disposable plastic packaging box according to claim 8, characterized in that: The upper half of the second annular protrusion (12) has two outer walls on both sides that are subjected to compression. The upper ends of the two compressed surfaces are inclined toward each other. The inner walls on both sides of the second annular groove (11) are provided with a portion of the inner wall of compression. The upper ends of the two inner walls of compression are inclined toward each other.

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