Sealing structure of packaging box

Abstract

The utility model provides a sealing structure of a packaging box, which belongs to the technical field of sealing structures of packaging boxes and comprises a packaging box body, a box cover is arranged at the top end of the packaging box body, first sealing strips which are longitudinally arranged at equal intervals are embedded in the upper portion of the outer side face of the packaging box body, and a limiting plate is fixedly connected to the middle of the bottom end of the box cover. The bottom end of the box cover is fixedly connected with a surrounding plate. By arranging the surrounding plate, when the box cover and the packaging box body are closed, the surrounding plate can be nested above the outer side face of the packaging box body, so that the surrounding plate can seal the box cover and the upper portion of the outer side face of the packaging box body, and meanwhile the surrounding plate can extrude a first sealing strip above the outer side face of the packaging box body; the lower portion of the first sealing strip is attached to the outer side of the packaging box body after the first sealing strip is extruded by the surrounding plate, and the first sealing strip is attached to the inner wall of the surrounding plate, so that the sealing performance after the box cover and the packaging box body are closed is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of sealing structure of packaging boxes, and in particular to a sealing structure for packaging boxes. Background Technology

[0002] Packaging boxes are boxes used to package products. Their main purpose is to protect the products during transportation and enhance their perceived quality. Packaging boxes can be classified according to material, such as cardboard boxes, tin boxes, wooden boxes, cloth boxes, leather boxes, acrylic boxes, corrugated boxes, PVC boxes, etc.; they can also be classified according to the name of the product they are packaging.

[0003] In the current packaging boxes, most of them have a top cover, and the top cover and the packaging box are mostly simply nested together, resulting in poor sealing between the packaging box and the box cover.

[0004] Therefore, this application provides a sealing structure for the packaging box to meet the requirements. Utility Model Content

[0005] The purpose of this utility model is to solve the problems existing in the above-mentioned background art and to propose a sealing structure for packaging boxes.

[0006] The technical problem to be solved by this utility model is to provide a sealing structure for packaging boxes to solve the problem of poor sealing performance of existing packaging box sealing structures.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] A sealing structure for a packaging box includes: a packaging box body, a lid at the top of the packaging box body, a first sealing strip arranged longitudinally at equal intervals embedded on the upper outer side of the packaging box body, a limiting plate fixedly connected to the middle of the bottom end of the lid, a surrounding plate fixedly connected to the bottom end of the lid, the inner wall size of the surrounding plate being the same as the outer side size of the packaging box body, a second sealing groove formed in the middle of the outer side of the limiting plate, and sealing sheets embedded on the upper periphery of the inner wall of the packaging box body, the sealing sheets having an outwardly convex arc surface away from the packaging box body, and sponge filling the gap between the sealing sheets and the inner wall of the packaging box body.

[0009] Preferably, the first sealing strip slopes downward from the side closest to the main body of the packaging box to the side furthest from the main body of the packaging box.

[0010] Preferably, a first sealing groove is provided at the top of the main body of the packaging box, and a second sealing strip is embedded in the bottom surface of the box lid in the area between the limiting plate and the surrounding plate. The second sealing strip and the first sealing groove are matched.

[0011] Preferably, a spring is fixedly connected between the second sealing strip and the box cover.

[0012] Preferably, the cross-section of the second sealing strip is an inverted frustum shape.

[0013] The sealing plate and the second sealing groove are designed as a set.

[0014] Compared with the prior art, this utility model has at least the following beneficial effects:

[0015] In the above solution, by setting up a partition, when the lid and the main body of the packaging box are closed, the partition will be nested above the outer side of the main body of the packaging box, so that the partition can form a seal on the upper part of the lid and the outer side of the main body of the packaging box. At the same time, the partition will squeeze the first sealing strip above the outer side of the main body of the packaging box. After being squeezed by the partition, the lower part of the first sealing strip will adhere to the outer side of the main body of the packaging box, and the lower part of the first sealing strip will adhere to the inner wall of the partition, thereby increasing the sealing performance after the lid and the main body of the packaging box are closed.

[0016] In the above solution, by setting a limiting plate, when the box lid and the main body of the packaging box are closed, the limiting plate will be embedded in the inner wall of the main body of the packaging box, and the perimeter of the limiting plate will squeeze the sealing sheet above the perimeter of the inner wall of the main body of the packaging box, so that the sealing sheet is tightly attached to the outer side of the limiting plate, thereby improving the sealing between the limiting plate and the main body of the packaging box, and further increasing the sealing between the box lid and the main body of the packaging box. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the disassembled packaging box body and lid of this utility model;

[0020] Figure 3 This is a schematic diagram of the cross-sectional structure of the main body of the packaging box in this utility model;

[0021] Figure 4 In this utility model Figure 3 A magnified structural diagram at point A.

[0022] [Figure Labels]

[0023] The packaging box body 1, support base 101, first sealing strip 102, first sealing groove 103, box cover 2, groove 201, limiting plate 202, surrounding plate 203, second sealing groove 204, second sealing strip 205, spring 206, sealing sheet 3.

[0024] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0025] 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.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides a sealing structure for a packaging box, comprising: a packaging box body 1, a box cover 2 at the top of the packaging box body 1, a first sealing strip 102 arranged longitudinally at equal intervals embedded on the upper outer side of the packaging box body 1, a limiting plate 202 fixedly connected to the middle of the bottom end of the box cover 2, a surrounding plate 203 fixedly connected to the bottom end of the box cover 2, the inner wall size of the surrounding plate 203 being the same as the outer side size of the packaging box body 1, a second sealing groove 204 formed in the middle of the outer side of the limiting plate 202, and a sealing sheet 3 embedded on the upper periphery of the inner wall of the packaging box body 1, the sealing sheet 3 having an outwardly convex arc surface away from the packaging box body 1, and the gap between the sealing sheet 3 and the inner wall of the packaging box body 1 being filled with sponge;

[0028] When the lid 2 and the main body 1 of the packaging box are closed, the surrounding plate 203 will be nested above the outer side of the main body 1 of the packaging box, so that the surrounding plate 203 can form a seal between the lid 2 and the outer side of the main body 1 of the packaging box. At the same time, the surrounding plate 203 will squeeze the first sealing strip 102 above the outer side of the main body 1 of the packaging box, increasing the sealing between the lid 2 and the main body 1 of the packaging box. When the lid 2 and the main body 1 of the packaging box are closed, the limiting plate 202 will be embedded in the inner wall of the main body 1 of the packaging box, and the periphery of the limiting plate 202 will squeeze the sealing sheet 3 above the periphery of the inner wall of the main body 1 of the packaging box, so that the sealing sheet 3 is tightly attached to the outer side of the limiting plate 202, thereby improving the sealing between the limiting plate 202 and the main body 1 of the packaging box, and further increasing the sealing between the lid 2 and the main body 1 of the packaging box.

[0029] In this embodiment, as Figures 2-4 As shown;

[0030] The first sealing strip 102 slopes downward from the side closest to the main body 1 of the packaging box to the side furthest from the main body 1 of the packaging box;

[0031] The first sealing strip 102, which is tilted, will be pressed by the surrounding plate 203 and will adhere to the outside of the main body of the packaging box 1. The first sealing strip 102 will also adhere to the inner wall of the surrounding plate 201, thereby increasing the sealing performance of the box lid 2 and the main body of the packaging box 1 after they are closed.

[0032] The top of the main body 1 of the packaging box is provided with a first sealing groove 103. The bottom surface of the box cover 2 is embedded in the area between the limiting plate 202 and the surrounding plate 203. The second sealing strip 205 is matched with the first sealing groove 103. A spring 206 is fixedly connected between the second sealing strip 205 and the box cover 2. The cross-section of the second sealing strip 205 is an inverted frustum.

[0033] When the lid 2 is closed to the main body 1 of the packaging box, the second sealing strip 205 will always be engaged in the first sealing groove 103, and the second sealing strip 205 will always be engaged downward in the first sealing groove 103 by the elastic force of the spring 206, which increases the sealing between the lid 2 and the main body 1 of the packaging box. Furthermore, the inverted frustum shape of the second sealing strip 205 can become narrower after being inserted into the first sealing groove 103, which makes it easier for the second sealing strip 205 to be inserted into the first sealing groove 103.

[0034] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0035] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A sealing structure for a packaging box, characterized in that, include: The main body of the packaging box (1) is provided with a lid (2) at the top. A first sealing strip (102) is embedded in the upper part of the outer side of the main body of the packaging box (1) and arranged at equal intervals in the longitudinal direction. A limiting plate (202) is fixedly connected to the middle part of the bottom end of the lid (2). A surrounding plate (203) is fixedly connected to the bottom end of the lid (2). The inner wall of the surrounding plate (203) is the same size as the outer side of the main body of the packaging box (1). A second sealing groove (204) is opened in the middle part of the outer side of the limiting plate (202). A sealing sheet (3) is embedded in the upper part of the inner wall of the main body of the packaging box (1). The sealing sheet (3) is a convex arc surface on the side away from the main body of the packaging box (1). The gap between the sealing sheet (3) and the inner wall of the main body of the packaging box (1) is filled with sponge.

2. The sealing structure of the packaging box according to claim 1, characterized in that: The first sealing strip (102) slopes downward from the side close to the main body (1) of the packaging box to the side away from the main body (1).

3. The sealing structure of the packaging box according to claim 1, characterized in that: The top of the main body (1) of the packaging box is provided with a first sealing groove (103), and the bottom surface of the box cover (2) is provided with a second sealing strip (205) in the area between the limiting plate (202) and the surrounding plate (203). The second sealing strip (205) and the first sealing groove (103) are provided in a matching manner.

4. The sealing structure of the packaging box according to claim 3, characterized in that: A spring (206) is fixedly connected between the second sealing strip (205) and the box cover (2).

5. The sealing structure of the packaging box according to claim 4, characterized in that: The cross-section of the second sealing strip (205) is an inverted frustum.

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