Packaging container and using method thereof

Abstract

The invention provides a packaging container and a using method thereof. The box body is provided with a containing cavity with an upward opening, and the peripheral side of the opening is provided with a boss part protruding upwards and a sealing groove formed in the peripheral side of the boss part. A first protruding part is arranged in the middle of the cover body, the first protruding part protrudes upwards, a containing space is formed in the inner side of the first protruding part, a plane is limited at the top end of the first protruding part, a second protruding part which protrudes upwards and is lower than the first protruding part is arranged on the peripheral side of the cover body, a reverse groove is formed, and a groove is formed between the second protruding part and the first protruding part. The outer side wall of the second protruding part extends downwards out of the inner side wall, and a turned-over edge is formed at the bottom end of the outer side wall. According to the invention, the first protruding part of the cover body enables the cover body to have a certain volume, and the cover body can be used as a dinner plate. And the grooves can accommodate fingers when serving as the dinner plate, so that the taking stability is improved. The turned-over edge and the reverse groove work together to overcome the defect that a flat product made of ultra-thin materials is prone to deformation, the thumb can be conveniently placed, and the situation that the edge is too sharp and consequently hurt is caused is avoided.

Description

[0001] This application is a divisional application of an application with an application date of August 16, 2021, application number 202110939254.X, and invention name “A packaging container and its use method”. Technical Field

[0002] The invention relates to a packaging container and a method for using the same. Background Art

[0003] With the rise of modern logistics and distribution, the demand for food, fresh produce, takeaway fast food, etc. is increasing. Taking takeaway fast food as an example, people are mostly accustomed to ordering multiple dishes to enjoy at the same time. In order to avoid mixing different dishes, when eating, they often need packaging boxes equal to the number of dishes to hold different dishes separately. In addition, most packaging boxes are disposable. This way of use has caused a lot of waste of packaging boxes.

[0004] In addition, the current requirements for packaging boxes are increasingly higher in terms of deformation resistance, damage resistance, food hygiene and safety. Most thin-walled fast food boxes on the market have poor sealing performance. In the event of squeezing or other careless transportation, there may be a risk of food spilling and box damage.

[0005] Therefore, it is necessary to provide a packaging container and a method of using the same to at least partially solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a packaging container including a box body and a cover body and a method of using the same. The cover body of the packaging container can be used as a dinner plate while providing a closing function, and also has good anti-deformation ability and can provide a good sealing function, which can ensure the safety and hygiene of dining and greatly reduce costs.

[0007] According to one aspect of the present invention, the packaging container comprises:

[0008] A box body, the box body having an upwardly opening accommodating cavity, the outer peripheral side of the opening being provided with an upwardly protruding boss portion and a sealing groove provided on the outer peripheral side of the boss portion, the top of the sealing groove being lower than the top wall of the boss portion; and

[0009] At least one cover body, a first protrusion is provided in the middle of the cover body, the first protrusion protrudes upward and forms a receiving space on the inner side of the cover body, the top end of the first protrusion defines a plane, and the middle part of the top wall of the first protrusion has a first recessed part recessed toward the inner side of the cover body, and the outer peripheral side of the cover body is provided with an inverted U-shaped second protrusion opening downward, the second protrusion protrudes upward and the protrusion height is lower than the first protrusion to form a reverse groove, the second protrusion has an inner side wall extending vertically, the end of the inner side wall is connected to the top wall of the first protrusion through an arc-shaped wall recessed toward the inner side of the cover body to form a groove, the outer side wall of the second protrusion extends downward beyond the inner side wall of the second protrusion, and the edge of the outer side wall is formed with a flange;

[0010] Wherein, when the cover body covers the box body, the boss portion is embedded in the second protruding portion, and the flange is embedded in the sealing groove.

[0011] According to this solution, the first protrusion of the cover of the packaging container protrudes upward to form a accommodating space inside the cover, so that the cover has a certain volume, so that it can be used as a dinner plate for holding food. A groove is provided between the first protrusion and the second protrusion, which is convenient for gripping when used as a cover, and can accommodate fingers when used as a dinner plate, thereby increasing the stability of taking the food. The flange on the outer peripheral side of the cover and the reverse groove work together to overcome the defect that flat products formed of ultra-thin materials are easy to deform, while avoiding the generation of sharp edges, making it convenient to place the thumb when taking the food and avoiding injuries. In addition, when the cover is closed over the box body, the flange can also play a sealing role.

[0012] In one embodiment, the ratio of the width of the groove to the maximum peripheral dimension of the cover body is 3-25, preferably 5-20.

[0013] According to the present solution, this ratio range can prevent the groove width from being too large and occupying more lateral dimensions, thereby reducing the volume of the cover when used as a dinner plate, and is also beneficial for enhancing the structural strength of the cover.

[0014] In one embodiment, the ratio of the height difference between the top wall of the first protrusion and the bottom end of the inner side wall of the second protrusion to the maximum outer dimension of the cover body is 5-20.

[0015] According to the present invention, the cover body made with the above ratio can maintain a relatively flat shape and play the role of covering the box body without wasting materials, and can also have sufficient depth and deformation resistance to be used as a dinner plate. Tests have shown that the above ratio is the best ratio, which can make the shape of the cover body balanced between the two uses and avoid being too inclined to one use and affecting the use of another use.

[0016] In one embodiment, the radial dimension of the cover is 10-40 cm. According to this solution, the size of the cover can meet the size requirements of being used as a dinner plate and as a cover.

[0017] In one embodiment, the flange extends outward from a bottom end of an outer side wall of the second protrusion and then bends upward.

[0018] According to this solution, the flange arranged in this way can further enhance the structural strength of the cover body.

[0019] In one embodiment, the top wall of the first protrusion further has a second recessed portion recessed toward the inner side of the cover body, and the second recessed portion is configured as an annular groove surrounding the first recessed portion.

[0020] According to this solution, the second recessed portion can further enhance the structural strength of the cover body.

[0021] In one embodiment, the bottom wall of the first recessed portion is flush with the bottom wall of the second recessed portion and is higher than the bottom wall of the groove.

[0022] According to the present solution, such an arrangement can ensure that the cover has sufficient volume, so that it can be conveniently used as a dinner plate.

[0023] In one embodiment, the ratio of the maximum peripheral dimension of the cover to the wall thickness is 300-700. Preferably, the wall thickness of the cover is not more than 0.6 mm. Such ultra-thin materials are particularly advantageous in terms of cost and environmental protection.

[0024] According to this solution, the corresponding wall thickness can be set according to the different lateral dimensions of the cover body to ensure the strength of the cover body. At the same time, the ultra-thin wall allows a large amount of material to be saved on the basis of ensuring sufficient structural strength.

[0025] In one embodiment, a radial width of the top wall of the first protrusion is greater than two-thirds of the diameter of the cover body.

[0026] According to this aspect, it is possible to ensure that the cover body has a sufficient volume.

[0027] In one embodiment, the side wall of the box body is provided with a parting line surrounding the side wall, and the parting line divides the side wall into an upper side wall and a lower side wall which are staggered inwardly and outwardly along the vertical direction, and the lower side wall is offset inwardly relative to the upper side wall.

[0028] In one embodiment, the parting line is configured in more than three wavy or curved shapes, with at least three peak-to-valley changes.

[0029] According to the above solutions, the parting line can play a positioning role when multiple box bodies are stacked, and can increase the structural strength of the box bodies.

[0030] In one embodiment, when the cover body covers the box body, the boss portion of the box body abuts against the inner side surface of the second protruding portion of the cover body to form a seal.

[0031] According to this solution, the boss portion and the second protrusion portion contact and cooperate to form a mutually staggered rotary matching structure, which can not only achieve sealing, but also have good stability and deformation resistance. When subjected to external force extrusion or twisting, the nested structures lock with each other to avoid disengagement, which can effectively overcome external force extrusion or twisting and achieve a higher matching strength. According to another aspect of the present invention, a method for using the packaging container as described above is also provided, wherein one of the at least one cover body can be covered with the box body and used as a packaging container for food, wherein at least one of the at least one cover body is used as a dinner plate when dining.

[0032] According to the present invention, one box body can be used in conjunction with multiple cover bodies. Since the design of the cover body can be used as a plate at the same time, it is particularly suitable for eating different meals at the same time or sharing meals with multiple people, which is clean and hygienic. At the same time, there is no need to buy multiple lunch boxes, and multiple cover bodies can be stacked and placed, which saves both cost and space. Especially for tableware formed by ultra-thin process technology, the present invention provides a dual-purpose anti-deformation sealed food functional packaging container that cannot be achieved in the prior art. During the packaging and transportation process, each box body and cover body can be packaged independently, and the cover body can be one or more as independent packages, or a box body and a cover body can be packaged together as a set, or a box body and multiple cover bodies can be packaged together as a set. This makes transportation and distribution particularly convenient and hygienic, breaking the limitations of the single use and one-to-one pairing of traditional fast food boxes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0034] Figure 1 A three-dimensional view of a cover of a packaging container according to a preferred embodiment of the present invention;

[0035] Figure 2 for Figure 1 A vertical cutaway view of the cover shown;

[0036] Figure 3A vertical sectional view of a cover of a packaging container according to another embodiment of the present invention;

[0037] Figure 4 for Figure 1 The schematic diagram of the cover body when used as a dinner plate;

[0038] Figure 5 A three-dimensional view of a box body of a packaging container according to the present invention;

[0039] Figure 6 for Figure 5 A vertical cutaway view of the box shown;

[0040] Figure 7 A schematic diagram of the lid body and the box body of the packaging container according to the present invention being used in conjunction with each other; and

[0041] Figure 8a-8d It is a schematic diagram of the cover body of the packaging container according to the present invention contacting and sealing with the box body.

[0042] Description of reference numerals:

[0043] 100 / 200 Cover

[0044] 11 First protrusion

[0045] 101 Accommodation Space

[0046] 111 Top wall of first protrusion

[0047] 12 Second protrusion

[0048] 121 Outer side wall of second protrusion

[0049] 122 inner side wall of the second protrusion

[0050] 13 Grooves

[0051] 131 Curved Wall

[0052] 14 Flanging

[0053] 141 lateral extension

[0054] 142 Vertical extension

[0055] 15 first recessed portion

[0056] 16 Second recessed portion

[0057] 300 Box

[0058] 301 Accommodation chamber

[0059] 21 Sidewall

[0060] 211 Upper side wall

[0061] 212 Lower side wall

[0062] 22 Sealing groove

[0063] 23 Boss

[0064] 231 Outer wall of boss portion

[0065] 232 Inner wall of boss portion

[0066] 24 Parting line

[0067] 201 Protruding tendons

[0068] 202 arc part DETAILED DESCRIPTION

[0069] Now, with reference to the accompanying drawings, the specific embodiments of the present invention are described in detail. What is described here is only the preferred embodiment of the present invention, and those skilled in the art can think of other ways to implement the present invention based on the preferred embodiment, and the other ways also fall within the scope of the present invention.

[0070] The present invention provides a dual-purpose ultra-thin sealed anti-deformation series packaging container, which can be used as a food container. The packaging container may include a box body with an opening and a cover body. The cover body can be covered on the box body to form a closed space between the two, thereby storing liquid or solid food in the packaging container. Of course, the packaging container is not limited to containing food, and it can be a container for containing any article. According to the present invention, the cover body and the box body can be made of materials with a certain elasticity, such as ultra-thin injection molding materials, thicker plastics, etc. In addition, materials such as metal or plastic can also be used. The packaging container according to the present invention is introduced in detail below in conjunction with the accompanying drawings. Among them, directional terms such as "inside", "outside", "upward", "downward", "lateral" and the like used below are based on the state of the cover body when it is used as a cover and placed normally.

[0071] Figure 1 and Figure 2 The disc-shaped cover 100 according to a preferred embodiment is shown, wherein a first protruding portion 11 protruding upward is provided in the middle thereof. The protrusion of the first protruding portion 11 forms a concave receiving space 101 inside the cover 100. Thus, when the cover 100 is turned over and placed with the first protruding portion 11 facing downward, the cover 100 can use the receiving space 101 to hold food and other items and be used as a dinner plate. Figure 4 The diagram shows a state diagram of the cover body 100 being used as a dinner plate.

[0072] Since the cover can be used for two purposes, when the user selects multiple dishes, he can choose only one packaging container and select several covers at the same time. That is, one box can be used with multiple covers. When eating, the covers can be used to hold different dishes respectively, or the covers can be used to share meals among multiple people. In this way, there is no need to buy multiple lunch boxes, which can greatly reduce the use of tableware, and multiple covers can be stacked, which saves both cost and space.

[0073] The top of the first protrusion 11 defines a plane, so that when the cover 100 is used as a dinner plate, it can be stably placed on a support surface (such as a tabletop) through the first protrusion 11. In the illustrated embodiment, the first protrusion 11 includes a top wall 111 forming a flat surface. Preferably, the lateral dimension of the first protrusion 11 as a whole is greater than two-thirds of the maximum peripheral dimension of the cover 100, ensuring that the accommodating space 101 has sufficient volume to hold food.

[0074] It is understandable that in other embodiments, the top of the first protrusion 11 may also form a rib-like protrusion or a bump structure with its top end located in the same plane, as long as the cover 100 can be stably placed when used as a dinner plate.

[0075] The outer peripheral side of the cover body 100 also has a second protrusion 12. The second protrusion 12 is arranged around the first protrusion 11, and a groove 13 is formed between the two. On the one hand, the second protrusion 12 can increase the structural strength of the cover body 100, especially when the cover body 100 is formed by ultra-thin process technology using plastic materials, such a setting to increase the structural strength is beneficial. On the other hand, a groove 13 is formed between the second protrusion 12 and the first protrusion 11. When the cover body 100 is used as a cover body, the cover body 100 can be conveniently grasped through the groove 13. When the cover body 100 is used as a dinner plate, the fingers of a person's hand can just fit into the groove 13, which can improve the stability when holding the dinner plate.

[0076] Continue to refer Figure 2 The second protrusion 12 is substantially an inverted U-shaped structure with an opening downward, that is, the second protrusion 12 forms a reverse groove opposite to the opening direction of the groove 13, and has an outer side wall 121 and an inner side wall 122 opposite to each other. Preferably, the outer side wall 121 of the second protrusion 12 extends downward beyond the inner side wall 122. Figure 4 As shown, when the cover 100 is used as a dinner plate, the outer side wall 121 of the second protrusion 12 forms the outer edge of the dinner plate. The above arrangement can make the dinner plate have a higher edge, thereby further increasing the volume of the dinner plate, which is beneficial when accommodating food containing soup.

[0077] Preferably, the height difference H between the bottom end of the inner side wall 122 of the second protrusion 12 and the top wall 111 of the first protrusion 11 (i.e., the protrusion height of the first protrusion 11) is 12-20 mm. In different embodiments, the height H can be specifically set to 13 mm, 15 mm, 18 mm, or any value within the above range. This allows the cover 100 to have a certain volume while maintaining a flat shape, thereby meeting the use requirements of both as a dinner plate and as a cover.

[0078] Preferably, the inner side wall 122 of the second protrusion 12 is configured as a vertically extending straight wall. The end of the inner side wall 122 is connected and transitioned to the top wall 111 of the first protrusion 11 through an arc-shaped wall 131 that is recessed toward the inner side of the cover body 100. In this way, the groove 13 is formed. The provision of the arc-shaped wall 131 can further enhance the structural strength of the cover body 100. In addition, during the injection molding process, the arc-shaped wall 131 can also facilitate demolding. In addition, refer to Figure 4 There is a large space between the arc wall 131 and the top wall 111 of the first protrusion 11, which can avoid dead corners and facilitate cleaning after the cover 100 is used as a dinner plate.

[0079] Preferably, the ratio of the width d of the groove 13 to the maximum outer dimension D of the cover 100 is 3-25, preferably 5-20. This ratio range can avoid the width of the groove 13 being too large, occupying more lateral dimensions and reducing the volume of the cover 100 when used as a dinner plate, and is also conducive to enhancing the structural strength of the cover 100. Specifically, the width d of the groove 13 can be set to 10-15mm to accommodate fingers inserted therein. In different embodiments, the width d of the groove 13 can be specifically set to 12mm, 13mm, 14mm or any value within the above range. In the illustrated embodiment, the width d is defined as the distance between the plane where the top surface of the second protrusion 12 is located and the intersection line of the arc wall 131 to the inner side wall 122 of the second protrusion 12 along the lateral direction. It can be understood that when the groove 13 is composed of two vertically extending walls, its width can be defined by the lateral dimension between the two vertically extending walls.

[0080] Furthermore, the bottom end of the outer side wall 121 of the second protruding portion 12 is provided with a flange 14, which together with the aforementioned reverse groove overcomes the defect that the flat product formed of ultra-thin material is easy to deform. Figure 4When the cover 100 is used as a dinner plate, the flange 14 forms the outer edge of the cover 100, and the thumb of a person just rests on the position of the flange 14 when picking up the cover 100. The flange 14 can prevent the cover 100 from having sharp edges and avoid injuries. In the illustrated embodiment, the flange 14 includes a lateral extension portion 141 extending laterally outward from the bottom end of the outer side wall 121 of the second protrusion 12 and a vertical extension portion 142 extending upward from the lateral extension portion 141. Thus, the flange 14 can further improve the structural strength of the cover 100 and enhance its ability to resist deformation. In addition, the flange 14 can also cooperate with the box body to play a sealing role, which will be described below.

[0081] Furthermore, in order to enhance the structural strength and anti-deformation capability of the cover body 100 in the middle, a first recessed portion 15 recessed toward the inner side of the cover body 100 is provided in the middle of the top wall 111 of the first protruding portion 11. The bottom wall of the first recessed portion 15 is higher than the bottom wall of the groove 13, so that the strength is increased while avoiding excessive reduction of the accommodation space 101 of the cover body 100.

[0082] In addition, the maximum peripheral dimension D of the cover body 100 can be set to 10-40 cm. In different embodiments, the maximum peripheral dimension D can be specifically set to 15 cm, 20 cm, 25 cm, 30 cm, 35 cm or any value within the above range to adapt to boxes of different sizes. Further preferably, the ratio of the height difference H between the bottom end of the inner side wall 122 of the second protruding portion 12 and the top wall 111 of the first protruding portion 11 to the maximum peripheral dimension D of the cover body 100 can be set to 5-20.

[0083] The wall thickness of the cover body 100 is set to be no greater than 0.6 mm. Under the premise of ensuring structural strength, materials can be saved and production costs can be reduced. It can be understood that for the cover body, when the maximum peripheral dimension D increases, its wall thickness also increases accordingly to ensure sufficient structural strength, while the wall thickness preferably maintains an ultra-thin specification. Preferably, the ratio of the maximum peripheral dimension D to the wall thickness ranges from 300 to 700. Specifically, the maximum peripheral dimension D and the wall thickness can have the following corresponding relationship:

[0084]

[0085] Figure 3A cover 200 according to another embodiment is shown, wherein the same structures are shown using the same reference numerals. Different from the cover 100, in the cover 200, the top wall 111 of the first protrusion 11 is also provided with a second recessed portion 16 that is recessed toward the inner side of the cover 100. The second recessed portion 16 forms an annular groove around the first recessed portion 15, with a spacing therebetween. Preferably, the bottom wall of the second recessed portion 16 is substantially flush with the bottom wall of the first recessed portion 15, and both are higher than the bottom wall of the groove 13. When the cover 200 is covered on the box 300 to be described in detail below, the annular groove formed by the second recessed portion 16 can also cooperate with the downwardly protruding annular rib provided at the bottom of another box 300, that is, the annular rib of the box 300 is snapped into the annular groove of the cover 200, so as to achieve positioning between two stacked packaging containers. In addition, the first recessed portion 15 and the second recessed portion 16 can also realize positioning between two upper and lower adjacent cover bodies 200 when the cover bodies 200 are stacked, so that the stacked cover bodies 200 are more neat and compact, and are convenient for transportation and storage.

[0086] Figures 5 and 6 The box body 300 according to a preferred embodiment is shown. The box body 300 is roughly configured as an inverted truncated cone or a cylindrical shape, and has a receiving cavity 301 surrounded by a bottom wall and a side wall 21, and an opening is formed at the top. When the cover body covers the opening and cooperates with the box body 300, a closed space is formed between the two.

[0087] Similar to the cover, the box body 300 can also be a structure formed by using plastic material through ultra-thin process technology. The outer peripheral side of the opening of the box body 300 is respectively provided with a boss portion 23 protruding upward, and a sealing groove 22 arranged on the outer peripheral side of the boss portion 23. The top of the sealing groove 22 is lower than the top wall of the boss portion 23. Figure 7 The cover body 200 used as a lid and another cover body 200 turned over and used as a dinner plate are shown respectively. When the cover body 200 used as a lid is matched with the box body 300, the boss portion 23 of the box body 300 is nested in the inverted U-shaped structure of the second protrusion 12 of the cover body 200, and the flange 14 of the cover body 200 is nested in the sealing groove 22. Furthermore, the boss portion 23 and the side wall and top wall of the second protrusion 12, as well as the flange 14 and the side wall and bottom wall of the sealing groove 22 are in contact with each other, forming a mutually staggered rotary matching structure to achieve sealing. Such a nested structure has good stability. When squeezed or twisted by external force, the nested structures lock with each other to avoid disengagement, thereby effectively overcoming the external force squeezing or twisting, and achieving higher matching strength and good sealing.

[0088] The specific form of the above-mentioned contact seal is Figure 8a-8d Shown in.

[0089] like Figure 8a As shown, the top wall, outer wall 231 and inner wall 232 of the boss portion 23 respectively abut against the top wall, outer wall 121 and inner side surface of the inner wall 122 of the first protrusion 12 in a surface contact manner, so that the boss portion 23 and the first protrusion 12 are in interference fit.

[0090] Figure 8b The sealing method shown is similar to Figure 8a The difference is that the opening angle of the second protrusion 12 is greater than the angle of the boss portion 23, so the outer wall 231 and the inner wall 232 of the boss portion 23 respectively abut against the outer wall 121 and the inner wall 122 of the first protrusion 12 in a line contact manner.

[0091] Figure 8c and Figure 8a The difference is that the outer side surface of the inner side wall 232 of the boss portion 23 is provided with a rib 201, and the inner side surface of the inner side wall 122 of the first protrusion 12 is contacted by the rib 201. It can be understood that in other embodiments, the rib 201 can also be provided on the inner side surface of the inner side wall 122 of the first protrusion 12, or the rib 201 can be provided on both the outer side surface of the inner side wall 232 of the boss portion 23 and the inner side surface of the inner side wall 122 of the first protrusion 12, but it should be noted that the two ribs 201 are staggered in the vertical direction. Of course, the rib 201 can also be provided on at least one of the outer side walls of the boss portion 23 and the first protrusion 12.

[0092] Figure 8d and Figure 8a The difference is that the inner side wall 122 of the first protruding portion 12 and the inner side wall 232 of the boss portion 23 are respectively provided with an arc portion 202 that is concave inward, and the sealing is achieved by the contact and cooperation of the respective arc portions 202. It can be understood that the arc portion 202 can also be arranged to protrude outward, or the arc portion 202 can also be arranged on the outer side walls of both the first protruding portion 12 and the boss portion 23.

[0093] In addition, if Figure 5As shown, the side wall 21 of the box body 300 is provided with a parting line 24. The parting line 24 extends around the circumference of the box body 300, and divides the side wall 21 into an upper side wall 211 and a lower side wall 212 that are staggered inside and outside in the up and down direction. Therefore, the parting line 24 is constructed as a structure similar to a step surface. Among them, the lower side wall 212 is offset inwardly relative to the upper side wall 211. When a plurality of box bodies 300 are stacked, the step surface of the parting line 24 can play a positioning role between two adjacent box bodies 300. Preferably, the parting line 24 is constructed in the form of a wavy line or a curve along the circumference, for example, a wavy line with three or more peaks and valleys is arranged along the circumference, which can enhance the structural strength of the box body 300, especially when the box body 300 is constructed as a structure formed by ultra-thin process technology.

[0094] It is understood that the shape of the cover depends on the shape of the opening of the box body that matches it. Therefore, the cover is not limited to a disc shape. When the entire box body or only the opening is configured as a square, rectangular, oval or any other possible shape, the cover can have a corresponding shape. In addition, the opening of the box body is not limited to being set at the top, and it can also be set at any possible position, such as opening at a part of the top or a part of the side of the box body. In addition, the maximum peripheral size and wall thickness of the box body can have the same settings as the maximum peripheral size and wall thickness of the above-mentioned cover body.

[0095] The above description of various embodiments of the present invention is provided to one of ordinary skill in the relevant art for the purpose of description. It is not intended that the present invention be exclusive or limited to a single disclosed embodiment. As above, a person of ordinary skill in the art will understand the various substitutions and modifications of the present invention. Therefore, although some alternative embodiments are specifically described, a person of ordinary skill in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all substitutions, modifications and variations of the present invention described herein, as well as other embodiments that fall within the spirit and scope of the present invention described above.

Claims

1. A packaging container, characterized in that: The packaging container comprises: A box body (300), the box body (300) having an upwardly opening accommodating cavity (301), the outer peripheral side of the opening being provided with an upwardly protruding boss portion (23) and a sealing groove (22) provided on the outer peripheral side of the boss portion (23), the top of the sealing groove (22) being lower than the top wall of the boss portion (23); and At least one cover (100), wherein a first protrusion (11) is provided in the middle of the cover (100), wherein the first protrusion (11) protrudes upward and forms a receiving space (101) on the inner side of the cover (100), wherein the receiving space (101) is used to receive food when the inner side of the cover (100) is placed upward, wherein the top end of the first protrusion (11) defines a plane, and the middle part of the top wall (111) of the first protrusion (11) has a first recessed portion (15) which is recessed toward the inner side of the cover (100) for increasing the structural strength, and the outer peripheral side of the cover (100) is provided with a downwardly extending recessed portion (15). an open inverted U-shaped second protruding portion (12), the second protruding portion (12) protruding upward and having a protruding height lower than the first protruding portion (11), the second protruding portion (12) having a vertically extending inner side wall (122), the end of the inner side wall (122) being connected to the top wall (111) of the first protruding portion (11) via an arc-shaped wall (131) recessed toward the inner side of the cover body to form a groove (13), the outer side wall (121) of the second protruding portion (12) extending downward beyond the inner side wall (122) of the second protruding portion (12), and a flange (14) being formed at the bottom end of the outer side wall (121); Wherein, when the cover body (100) covers the box body (300), the boss portion (23) is embedded in the second protruding portion (12), and the flange (14) is embedded in the sealing groove (22).

2. The packaging container according to claim 1, characterized in that: The ratio of the width of the groove (13) to the maximum peripheral dimension of the cover body is 3-25.

3. The packaging container according to claim 1, characterized in that: The ratio of the height difference between the top wall (111) of the first protruding portion (11) and the bottom end of the inner side wall (122) of the second protruding portion (12) to the maximum outer dimension of the cover body is 5-20.

4. The packaging container according to claim 3, characterized in that: The maximum outer dimension of the cover body (100) is 10-40 cm.

5. The packaging container according to claim 1, characterized in that: The flange (14) extends outward from the bottom end of the outer side wall (121) of the second protruding portion (12) and then bends upward.

6. The packaging container according to claim 1, characterized in that: The top wall (111) of the first protruding portion (11) further comprises a second recessed portion (16) recessed toward the inner side of the cover body (100), and the second recessed portion (16) is configured as an annular groove surrounding the first recessed portion (15).

7. The packaging container according to claim 6, characterized in that: The bottom wall of the first recessed portion (15) is flush with the bottom wall of the second recessed portion (16), and is higher than the bottom wall of the groove (13).

8. The packaging container according to claim 1, characterized in that: The ratio of the maximum peripheral dimension of the cover body (100) to the wall thickness is 300-700.

9. The packaging container according to claim 1, characterized in that: The radial width of the top wall (111) of the first protruding portion (11) is greater than two thirds of the diameter of the cover body.

10. The packaging container according to claim 1, characterized in that: The side wall (21) of the box body (300) is provided with a parting line (24) which surrounds the side wall (21), and the parting line (24) divides the side wall (21) into an upper side wall (211) and a lower side wall (212) which are staggered inwardly and outwardly inwardly along the vertical direction, and the lower side wall (212) is offset inwardly relative to the upper side wall (211).

11. The packaging container according to claim 10, characterized in that: The parting line (24) is configured in a wave shape.

12. The packaging container according to claim 1, characterized in that: When the cover body (100) covers the box body (300), the boss portion (23) of the box body (300) abuts against the inner side surface of the second protruding portion (12) of the cover body (100) to form a seal.

13. The method for using the packaging container according to claim 1, characterized in that: One of the at least one cover body can be covered with the box body to be used as a packaging container for food, wherein at least one of the at least one cover body is used as a dinner plate during dining.

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