Ultra-thin packaging container for logistics distribution

Abstract

An ultra-thin packaging container for logistics distribution, comprising: a box (11), which has an accommodating cavity (13); and a cover (12), which can cover and close the accommodating cavity. The box (11) is provided with an inner straight edge (14) extending upwards at the edge of the opening of the accommodating cavity (13), and a flat edge (115) laterally extending outwards is provided at the upper edge of the inner straight edge (14). A vertical inner groove wall (121) extending upwards is provided on the edge of the cover (12), a groove top wall (122) laterally extending outwards is provided on the upper edge of the inner groove wall (121), and in a state in which the cover (12) covers the box (11), the inner straight edge (14) is located on the outer side of the inner groove wall (121) and is inclined relative to the inner groove wall (121), an elastic abutting intersection line (L) is formed between the inner straight edge (14) and the inner groove wall (121), and a separation area (S) and a deformation self-locking area (D) are formed on two sides of the abutting intersection line (L), respectively. In the separation area (S), the inner groove wall (121) and the inner straight edge (14) are s[aced apart and form an included angle relative to the abutting intersection line (L); and in the deformation self-locking area (D), at least one of the inner groove wall (121) and the inner straight edge (14) is elastically deformed, and the inner groove wall (121) and the inner straight edge (14) fit together by deformation. It is possible to further improve the sealing performance during compression deformation while ensuring the labor-saving operation of opening the cover.

Description

Ultra-thin packaging containers for logistics and distribution Technical Field

[0001] The present application relates to the technical field of ultra-thin injection molding, and more specifically, to an ultra-thin packaging container that can be used for logistics distribution. Background Art

[0002] The sealing structures of traditional food packaging containers, such as the flat snap-fit ​​structure of foamed plastic containers, the interlocking groove closed snap-fit ​​structure of blister containers, and the lock-and-seal structure of thin-walled injection-molded containers, mostly have defects such as poor sealing and easy breakage due to impact. In order to solve the sealing problem and at the same time eliminate obsolete production capacity and achieve the goals of energy conservation and material reduction, environmental protection and hygiene, the applicant pioneered ultra-thin injection molding technology and developed food containers for takeout packaging based on it. Taking advantage of the characteristics of ultra-thin molded products with large deformation and excellent elasticity, the applicant has successively developed and designed patented results such as lock-and-seal, ultra-thin full seal, angled elastic top seal, double-groove anti-deformation seal and other iterative sealing structures. These achievements have continuously improved and solved the sealing and leakage problems of takeout delivery containers, while also achieving the effects of easy opening and closing and convenient use.

[0003] Existing ultra-thin injection molding technology is used to manufacture packaging containers. The molding area is within the range of 50mm×50mm to 300mm×300mm (or the flow length ratio is ≥150), and the wall thickness can be reduced to less than 0.55mm, or even to 0.3mm. However, due to the characteristics of ultra-thin wall thickness, the box body and lid structure of such ultra-thin containers and their manufacturing process are usually difficult to adapt to the sealing structure of rigid conditions such as conventional thick-walled packaging containers. In addition, due to the accuracy and error of the processing dimensions, combined with the influence of various internal and external environmental factors in the process of food production and packaging, logistics distribution, and consumer use, it is possible that gaps may form between the box body and the lid, or the lid may fall off directly, leading to sealing failure.

[0004] Currently, ultra-thin injection molding technology is increasingly used in containers such as lunch boxes. With the further improvement of modern logistics and distribution efficiency and food safety requirements, the market and consumers have put forward higher requirements for the performance of ultra-thin sealed food packaging containers in terms of deformation resistance, impact resistance, pressure resistance, damage resistance, and sealing.

[0005] Summary of the Invention

[0006] The purpose of this application is to provide an ultra-thin packaging container for logistics distribution, so as to further improve the sealing performance of the packaging container when it is compressed and deformed while ensuring that the lid is opened with little effort.

[0007] According to one aspect of the present application, the ultra-thin packaging container comprises:

[0008] A box body, the box body comprising a receiving cavity with an upward opening, an edge of the opening being provided with an inner straight edge extending upward, and an upper edge of the inner straight edge being provided with a flat edge extending laterally outward; and

[0009] A cover body, the cover body can cover the box body to close the accommodating cavity, the edge of the cover body is provided with an inner groove wall extending upward, and the upper edge of the inner groove wall is provided with a groove top wall extending laterally outward.

[0010] In which, the inner groove wall is vertical, and the inner straight edge is inclined relative to the inner groove wall. When the cover body covers the box body, the inner groove wall is located on the inner side of the inner straight edge. An elastic supporting intersection line is formed between the inner groove wall and the inner straight edge, and a separation area and a deformation self-locking area are respectively formed on both sides of the supporting intersection line. In the separation area, the inner groove wall and the inner straight edge are spaced apart and form an angle with the supporting intersection line as the vertex. In the deformation self-locking area, at least one of the inner groove wall and the inner straight edge is elastically deformed and the two are deformed and fitted together.

[0011] In this way, the cover and the box body undergo a certain deformation during the buckling process, and a separation area with an angle is retained after buckling, and at the same time, there is a deformation self-locking area, forming a circle of sealing lines at the top intersection line. The deformation self-locking area of ​​the deformation fit not only forms another sealing area, but also plays a self-locking role, so that the cover and the box body will not be accidentally opened when it is expected to be opened.

[0012] In some embodiments, in the separation zone, the angle between the inner groove wall and the inner straight edge is 0.1°-10°, preferably 1.25°-5°.

[0013] In some embodiments, the box body is further provided with an outer straight edge extending downward on the outer edge of the flat edge, and the cover body is further provided with an outer groove wall extending downward on the outer edge of the groove top wall, wherein, when the cover body covers the box body, the outer groove wall is located on the outside of the outer straight edge and is inclined relative to the outer straight edge, and an elastic supporting intersection line is formed between the outer groove wall and the outer straight edge, and a separation area and a deformation self-locking area are respectively formed on both sides of the supporting intersection line, in the separation area, the outer groove wall and the outer straight edge are spaced apart, and in the deformation self-locking area, at least one of the outer groove wall and the outer straight edge is elastically deformed and the two are deformed and fitted together.

[0014] In some embodiments, the orientation of the separation zone and the deformation self-locking zone formed between the inner groove wall and the inner straight edge relative to the top holding intersection line is opposite to the orientation of the separation zone and the deformation self-locking zone formed between the outer groove wall and the outer straight edge relative to the top holding intersection line.

[0015] In some embodiments, a limiting block is provided on the inner side surface of the outer groove wall, and the lower edge of the outer straight edge abuts against the upper side of the limiting block.

[0016] In some embodiments, the lower edge of the outer straight edge extends laterally outward and then vertically upward to form a groove. The lower edge of the outer groove wall is provided with an embedded portion extending laterally outward. When the cover body covers the box body, the embedded portion is embedded in the groove.

[0017] In some embodiments, a limit block is provided on the inner side surface of the outer side wall of the groove, and when the cover is covering the box body, the embedded portion is located below the limit block, and when viewed vertically, the projection of the limit block and the projection of the embedded portion at least partially overlap. Preferably, the embedded portion abuts against the lower side of the limit block.

[0018] In some embodiments, one of the outer straight edge and the outer groove wall extends at least partially vertically, and the other of the outer straight edge and the outer groove wall at least partially tilts outward as it extends downward, so as to cooperate to form the separation zone, the top holding intersection line and the deformation self-locking zone.

[0019] In some embodiments, the deformable self-locking area is flat in a vertical cross-section after the packaging container lid is closed in place.

[0020] In some embodiments, the width of the deformation self-locking zone is 0.5-10 mm.

[0021] The solution of this application can achieve the following beneficial effects:

[0022] 1. The parts of the deformation self-locking zone that fit together have an internal and external elastic force that can achieve self-locking and prevent the two from separating. Especially when subjected to external extrusion force, due to the good elasticity and plasticity of the ultra-thin wall thickness, the parts that fit together will move with the deformation, but they will always be held together to achieve a lasting sealing effect. In this way, in addition to forming a circle of sealing lines at the intersection line of the holding, the deformation self-locking zone of the deformation fit not only forms another sealing area, but also plays a self-locking role, so that the cover and box body will not be accidentally opened when they are expected to be opened. Taking into account that different ultra-thin wall thicknesses will affect the elastic properties, the elastic top fitting self-locking strength of the deformation self-locking zone can be further enhanced by using an appropriately smaller thin wall thickness; in addition, the cover and box body can also choose different wall thicknesses to affect the deformation area and self-locking strength. The above design reduces the processing accuracy requirements of the present application, thereby making processing easier and significantly reducing costs.

[0023] 2. The angle setting can make the vertical component of the external extrusion force smaller than the vertical component of the friction force generated by this extrusion force. This prevents the lid from opening unexpectedly during extrusion, maintaining a seal. When the angle is set smaller, the lid and box body are more likely to embed deeper, forming a wider self-locking zone, thereby increasing the holding force and improving the seal. When the angle is set larger, the lid and box body embed more shallowly, forming a narrower self-locking zone, reducing the holding force and making opening and closing easier. In other words, by varying the deformation self-locking width, the self-locking force can be increased or decreased according to demand.

[0024] 3. In addition, the relative inclination of the inner straight edge and the inner groove wall is reasonably set so that the deformation fitting part can be higher or lower, and the unnecessary friction when opening the lid can be significantly reduced, making the opening action more labor-saving.

[0025] 4. The present application utilizes the angle between the inner straight edge of the box body and the inner side wall of the cover body of the container to hold the sealing line and improves the angled elastic top into a deformation fit to form a sealed self-locking area. The limited elastic top deformation space in the self-locking area and the double wall thickness fit of the inner straight edge and the inner groove wall are utilized to increase the rigidity of the key sealing components on the basis of ultra-thinness, and can achieve self-locking while sealing, thereby enhancing the container's anti-deformation, anti-impact, and anti-pressure performance, and achieving a rigorous sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to better understand the above and other purposes, features, advantages and functions of the present application, 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 application and have no limiting effect on the scope of the present application. The components in the drawings are not drawn to scale.

[0027] FIG1 is a vertical cross-sectional view of a container according to a first embodiment of the present application;

[0028] FIG2 is a partial enlarged view of portion A in FIG1 ;

[0029] FIG3 is a vertical cross-sectional view of a container according to a second embodiment of the present application;

[0030] FIG4 is a partial enlarged view of portion B in FIG3 ;

[0031] FIG5 is a modified example of FIG3;

[0032] FIG6 is a vertical cross-sectional view of a container according to a third embodiment of the present application;

[0033] FIG7 is a partial enlarged view of portion C in FIG6 ;

[0034] 8 and 9 are modified examples of FIG. 6 . DETAILED DESCRIPTION

[0035] Now, with reference to the accompanying drawings, the specific embodiments of the present application will be described in detail. What is described here is only the preferred embodiment of the present application. Those skilled in the art may conceive of other ways to implement the present application based on the preferred embodiment, and the other ways also fall within the scope of the present application.

[0036] The present application provides a packaging container for logistics distribution (hereinafter referred to as container), which can be used to store liquid or solid food during the logistics distribution process. In particular, the container according to the present application can be made of a material with a certain elasticity through ultra-thin injection molding process. Ultra-thin injection molding process refers to the production of a container with a wall thickness of less than 0.5mm (even less than 0.35mm), a wall thickness accuracy tolerance of ±0.05mm, and a molding area of ​​10*6000mm by injection molding. 2 The ratio of the thickness of the ultra-thin molding to the molding area of ​​this application is less than 3 / 100000. The parts obtained by this molding process technology have the characteristics of ultra-thin material reduction, uniform compressive resistance and excellent elastic-plastic properties, and meet the requirements of environmentally friendly and energy-saving green process technology and green application.

[0037] The container according to the present application is described in detail below with reference to the accompanying drawings.

[0038] As shown in Figure 1, a container 1 according to a preferred embodiment of the present application includes a box body 11 and a cover body 12. The box body 11 has a accommodating cavity 113 surrounded by a box side wall 111 and a box bottom wall 112. In the following description, the accommodating cavity 113 will be used as a reference, for example, the direction toward the accommodating cavity 113 is regarded as the inside, and the direction away from the accommodating cavity 113 is regarded as the outside. The accommodating cavity 113 forms an opening at the top that communicates with the outside. The user can put food into the accommodating cavity 113 through the opening, or take it out of the accommodating cavity 113. The cover body 12 can cooperate with the box body 11 and cover the opening of the accommodating cavity 113 so as to isolate the accommodating cavity 113 from the external environment and achieve a sealing effect.

[0039] Figure 2 shows the structure of the box body 11 and the lid 12 when they are closed. Specifically, the box body 11 is provided with an upwardly extending inner straight edge 114 at the opening edge of the accommodating cavity 113, and the upper edge of the inner straight edge 114 is provided with a laterally extending flat edge 115. The edge of the lid 12 is provided with an upwardly extending inner groove wall 121, and the upper edge of the inner groove wall 121 is provided with a laterally extending groove top wall 122.

[0040] The inner groove wall 121 is at least partially vertical. When the lid 12 is closed onto the box body 11, the inner groove wall 121 is located on the inner side of the inner straight edge 114, and the two are arranged at an angle. "Inclined" here means that the inner groove wall 121 and the inner straight edge 114 are not parallel, and form an angle between them when the lid 12 is closed. Furthermore, the inner groove wall 121 and the inner straight edge 114 are at least partially elastically supported together, forming an elastically supported support intersection line L. A separation zone S and a deformation self-locking zone D are also formed on either side of the support intersection line L. In the separation zone S, the inner groove wall 121 and the inner straight edge 114 are separated and form an angle α with the support intersection line L as the vertex. In the deformation self-locking zone D, at least one of the inner groove wall 121 and the inner straight edge 114 undergoes elastic deformation, and the two deform and fit together.

[0041] According to the above solution, the smooth curved surfaces of inner groove wall 121 and inner straight edge 114, in contact with each other in deformation self-locking zone D, exert a force that acts both internally and externally. After collapsing with inner straight edge 114, inner groove wall 121 embeds within the space enclosed by inner straight edge 114, and the two compress against each other, thereby achieving a self-locking effect and preventing them from separating. In particular, when container 1 is subjected to external compressive forces, due to the excellent elastic-plastic properties of the ultra-thin wall thickness, the contacting portions will move with deformation, but will remain firmly in contact, achieving a good sealing effect.

[0042] In addition, the angle α between the inner groove wall 121 and the inner straight edge 114114 in the separation zone S is set to 0.1°-10°, preferably 1.25°-5°. This angle setting makes it possible that when the container 1 is subjected to an extrusion force (for example, a force perpendicular to the inner straight edge 114), the component of the extrusion force acting on the inner groove wall 121 in the vertical direction is smaller than the component of the friction force generated between the inner groove wall 121 and the inner straight edge 114 based on the extrusion force in the vertical direction. In this way, it is possible to avoid the situation where the cover body 12 is unexpectedly opened due to external extrusion force. Taking into account the gravity of the cover body 12 itself, the anti-opening effect will be more obvious. Therefore, the container according to the present application has an excellent sealing effect and the ability to prevent accidental opening of the cover.

[0043] The closing process of the lid body 12 is as follows. When the lid body 12 is buckled into the opening of the accommodating cavity 113, the inner groove wall 121 first contacts the inner straight edge 114, and the position where the two first contact forms a holding intersection line L, at which point the lid body 12 has entered a sealed state. As the lid body 12 moves further downward, the inner groove wall 121 and the inner straight edge 114 are further pressed against each other at a position on one side of the holding intersection line L, causing the two to elastically deform and fit together, entering a self-locking state. Among them, when observed in the vertical section, the separation area S, the holding intersection line L and the deformation self-locking area D form a roughly "Y"-shaped structure, that is, the deformation self-locking area D forms a flat fitting wall surface in the vertical section. This self-locking state can not only effectively prevent the lid body and the box body from accidentally disengaging, but also form a more effective sealing area. Preferably, in some embodiments, the inner groove wall 121 can be set to be vertical, while the inner straight edge 114 is set to be inclined upward and outward. In this way, the cover and the box body undergo a certain deformation during the buckling process, and a separation area with an angle is retained after buckling, and at the same time, there is a deformation self-locking area, forming a circle of sealing lines at the top intersection line. The deformation self-locking area of ​​the deformation fit not only forms another sealing area, but also plays a self-locking role, so that the cover and the box body will not be accidentally opened when it is expected to be opened.

[0044] The smaller the angle α between the inner groove wall 121 and the inner straight edge 114, the deeper the inner groove wall 121 can fit toward the bottom of the accommodating cavity 113, thereby forming a larger deformation self-locking area D. The greater the holding force between the inner groove wall 121 and the inner straight edge 114 in the deformation self-locking area D, the tighter the cover 12 is closed. On the contrary, when the angle α is larger, the fitting of the inner groove wall 121 is shallower, thereby forming a smaller deformation self-locking area D, the holding force is relatively small, and the cover 12 can be opened more easily. This allows different angle designs to be selected according to different requirements for the strength of the container's self-locking seal and the difficulty of opening the cover in different usage scenarios (such as product packaging in the production process, logistics distribution, or consumer use), and the self-locking performance of the container and the difficulty of opening the cover can be adjusted. Preferably, the width of the deformation self-locking area D is set to 0.5-10mm. It can be understood that the deformation self-locking zone D surrounds the container along the circumference, so the width here refers to the size of the deformation self-locking zone D along the approximately vertical direction.

[0045] Preferably, the inner straight edge 114 and / or the inner groove wall 121 are tilted outward along the vertical direction. During the lid opening process, once the inner straight edge 114 and the inner groove wall 121 partly disengage in the deformed self-locking zone D, as the lid 12 moves upward, the lateral distance between the inner groove wall 121 and the inner straight edge 114 becomes increasingly greater. Even if the lid 12 has not yet been completely removed from the opening of the box body 11 and the inner groove wall 121 is still within the range of the inner straight edge 114, the inner groove wall 121 and the inner straight edge 114 no longer contact each other. In this way, unnecessary friction during lid opening can be significantly reduced, making the lid opening operation more labor-saving.

[0046] In the illustrated embodiment, the inner straight edge 114 has a larger inclination angle, and a separation zone S, an elastic support intersection line L, and a deformation self-locking zone D are formed vertically from top to bottom between the inner straight edge 114 and the inner groove wall 121. It will be appreciated that in other embodiments, the inner groove wall 121 may have an even larger inclination angle, and a deformation self-locking zone D, an elastic support intersection line L, and a separation zone S are formed vertically from top to bottom between the inner straight edge 114 and the inner groove wall 121. Further preferably, one of the inner straight edge 114 and the inner groove wall 121 may be configured to extend vertically, while the other may extend at an angle.

[0047] Fig. 3 and Fig. 4 show the container 2 according to another preferred embodiment of the present application, and its structure is roughly the same as that of the container 1 according to the embodiment shown in Fig. 1, and parts of similar structure or function are given identical or similar reference numerals.Difference is that, in container 2, the outer edge of the flat edge 215 of box body 21 is provided with an outer straight edge 216 extending downward.The outer edge of the groove top wall 222 of lid body 22 is provided with an outer groove wall 223 extending downward.In this way, the inner straight edge 214, flat edge 215 and outer straight edge 216 of box body 21 form the box mouth complex edge.The inner groove wall 221, groove top wall 222 and outer groove wall 223 of lid body 22 constitute the annular groove with opening downward.

[0048] When the lid 22 is closed onto the box body 21, the annular groove is locked onto the double edge of the box opening, that is, the outer groove wall 223 is located outside the outer straight edge 216. The inner groove wall 221 cooperates with the inner straight edge 214 in the same manner as the inner groove wall 121 and the inner straight edge 114 in the embodiment shown in Figure 1. In addition, the outer straight edge 216 extends downward while tilting outward at least at its end, and is abutted against the inner side surface of the outer groove wall 223. The inner side surface of the outer groove wall 223 can also be provided with an inwardly protruding stopper 224. The end of the outer straight edge 214 is abutted above or directly against the stopper 224, thereby achieving the locking function of preventing the buckle from falling off.

[0049] Although not shown in the figures, it is understood that, given sufficient length, the outer straight edge 216 and outer groove wall 223 can also form a fitting arrangement identical to or similar to that between the inner straight edge 214 and inner groove wall 221. Specifically, the outer straight edge 216 and outer groove wall 223 are arranged at an angle, forming an angle when closed. Furthermore, the outer straight edge 216 and outer groove wall 223 are at least partially elastically supported together, forming an elastically supported support intersection line. Separation zones and deformation self-locking zones are also formed on either side of the support intersection line. In the separation zone, the outer straight edge 216 and outer groove wall 223 are spaced apart and form an angle with the support intersection line as the vertex. In the deformation self-locking zone, at least one of the outer straight edge 216 and outer groove wall 223 undergoes elastic deformation, and the two deform and fit together.

[0050] When the above-described fit is formed between the outer straight edge and the outer groove wall, and between the inner straight edge and the inner groove wall, the orientations of the separation zone and the deformation self-locking zone relative to the support intersection line are preferably opposite at these two fit locations. As shown in Figure 4, the separation zone S, the elastic support intersection line L, and the deformation self-locking zone D are formed vertically from top to bottom between the inner straight edge 214 and the inner groove wall 221. Meanwhile, the deformation self-locking zone D, the elastic support intersection line L, and the separation zone S are formed vertically from top to bottom between the outer straight edge 216 and the outer groove wall 223.

[0051] Figure 5 shows a variation of the embodiment shown in Figure 3 . This variation eliminates the stoppers and instead features concave and convex structures on the inner side of the outer straight edge 216a and the outer side of the outer groove wall 223a. When the outer straight edge 216a and the outer groove wall 223a are closed, the concave and convex structures mate to achieve the snap-fit ​​function. Preferably, the outer straight edge 216a and / or the outer groove wall 223a have a substantially uniform thickness, and the concave and convex structures are achieved through their inherent curvature. That is, a concave structure appears as a convex structure on the opposite side, while a convex structure appears as a concave structure on the opposite side. It is understood that the outer straight edge 216a and / or the outer groove wall 223a may also have a non-uniform wall thickness. For example, the convex or concave structure may be formed by additionally protruding outwards or recessing inwards, in addition to the thickness of the outer straight edge 216a and / or the outer groove wall 223a. In addition, preferably, the concave and convex structures are formed into an arc shape, so as to have a smooth transition edge, which facilitates the two to fit together when the cover is closed and to release the fit when the cover is opened. In addition, the modification shown in Figure 5 has a substantially similar structure to the embodiment shown in Figure 3.

[0052] Figures 6 and 7 illustrate another preferred embodiment of a container 3 according to the present application. Its structure is substantially similar to that of the container 2 according to the embodiment shown in Figure 3 , with parts with similar structures or functions being designated by the same or similar reference numerals. The difference is that in container 3, the lower end of the outer straight edge 316 does not abut against the inner side surface of the outer groove wall 323. Instead, it extends beyond the lower edge of the outer groove wall 323 and continues laterally outward at the lower edge of the outer straight edge 316 by a predetermined dimension before continuing vertically upward to form a groove 317. In this way, the inner straight edge 314, flat edge 315, and outer straight edge 316 form an inverted U-shape with a downward opening, while the groove 317 forms a straight U-shape with an upward opening. Together, these two components form the composite staggered structure of the box body 31. This results in excellent deformation resistance in the position where the box body 31 mates with the lid 32. This improves the safety of the container during transportation and after it has been filled with food. While maintaining sufficient deformation resistance, the container wall thickness can be further reduced to a certain extent.

[0053] Preferably, referring to the modified example shown in FIG8 , the inner side surface of the outer sidewall of the groove 317a is provided with an inwardly protruding stopper 318a. The lower edge of the outer groove wall 323a may also be provided with an inset portion 324a extending laterally outward. When the lid body is closed onto the box body, the inset portion 324a is embedded in the groove 317a and located below the stopper 318a. The inset portion 324a can be supported on the lower side of the stopper 318a or can be spaced apart from the stopper 318a. However, when viewed in the vertical direction, the stopper 318a and the inset portion 324a at least partially overlap. Therefore, the stopper 318a can lock the inset portion 324a to prevent it from falling off. FIG9 shows a further modified example based on FIG8 , in which a locking wall 325b extending upward and outward is provided on the radially outer side of the inset portion 324b. The upper edge of the locking wall 325b abuts the inner side of the outer wall of the groove 317b, further enhancing its resistance to deformation. Furthermore, the extension direction of the locking wall 325b allows it to automatically deform and evade the pressure of the stopper 318b during the closing process, facilitating closing. In the closed state, the stopper 318b also prevents the locking wall 325b from moving upward, preventing the lock from falling off.

[0054] Similar to the embodiment shown in FIG3 , the inner straight edge 314 and inner groove wall 321 of container 3 also form a fitting arrangement identical or similar to that between the inner straight edge 214 and inner groove wall 221 of container 2. Furthermore, the outer straight edge 316 and outer groove wall 323 of container 3 also form a fitting arrangement identical or similar to that between the inner straight edge 314 and inner groove wall 321. That is, except for the lower end of the outer straight edge being held against the inner side surface of the outer groove wall and the inner side surface of the outer groove wall being provided with a stopper, the structures and features of container 2 according to the embodiment shown in FIG3 are also applicable to container 3 according to the embodiment shown in FIG6 .

[0055] Under the same conditions, the wall thickness of the aforementioned ultra-thin container is selected to be smaller, which can make the self-locking strength stronger due to its better elastic properties.

[0056] The above description of the various embodiments of the present application is provided to one of ordinary skill in the relevant art for the purpose of description. It is not intended that the present application 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 application. 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 application is intended to include all substitutions, modifications and variations of the present application described herein, as well as other embodiments that fall within the spirit and scope of the present application described above.

Claims

1. An ultra-thin packaging container for logistics distribution, characterized in that: The ultra-thin packaging container comprises: A box body (11), the box body (11) comprising a receiving cavity (113) with an upward opening, an edge of the opening being provided with an inner straight edge (114) extending upward, and an upper edge of the inner straight edge (114) being provided with a flat edge (115) extending laterally outward; and A cover body (12), wherein the cover body (12) can cover the box body (11) to close the accommodating cavity (113), an edge of the cover body (12) is provided with an inner groove wall (121) extending upward, and an upper edge of the inner groove wall (121) is provided with a groove top wall (122) extending laterally outward. The inner groove wall (121) is vertical, and the inner straight edge (114) is inclined relative to the inner groove wall (121). When the cover body (12) covers the box body (11), the inner groove wall (121) is located on the inner side of the inner straight edge (114). An elastic supporting intersection line (L) is formed between the inner groove wall (121) and the inner straight edge (114), and a separation area (S) and a deformation self-locking area (D) are formed on both sides of the supporting intersection line (L). In the separation area (S), the inner groove wall (121) and the inner straight edge (114) are spaced apart and form an angle with the supporting intersection line (L) as the vertex. In the deformation self-locking area (D), at least one of the inner groove wall (121) and the inner straight edge (114) is elastically deformed and the two are deformed and fitted together.

2. The ultra-thin packaging container according to claim 1, characterized in that: In the separation zone (S), the angle between the inner groove wall (121) and the inner straight edge (114) is 0.1° to 10°.

3. The ultra-thin packaging container according to claim 1, characterized in that: The box body is further provided with an outer straight edge (216) extending downward on the outer edge of the flat edge, and the cover body is further provided with an outer groove wall (223) extending downward on the outer edge of the groove top wall. Wherein, when the cover body covers the box body, the outer groove wall (223) is located outside the outer straight edge (216) and is inclined relative to the outer straight edge (216). An elastic supporting intersection line (L) is formed between the outer groove wall (223) and the outer straight edge (216), and a separation zone (S) and a deformation self-locking zone (D) are respectively formed on both sides of the supporting intersection line (L). In the separation zone (S), the outer groove wall (223) and the outer straight edge (216) are spaced apart. In the deformation self-locking zone (D), at least one of the outer groove wall (223) and the outer straight edge (216) is elastically deformed and the two are deformed and fitted together.

4. The ultra-thin packaging container according to claim 3, characterized in that: The orientation of the separation zone and the deformation self-locking zone formed between the inner groove wall and the inner straight edge relative to the top holding intersection line is opposite to the orientation of the separation zone (S) and the deformation self-locking zone (D) formed between the outer groove wall (223) and the outer straight edge (216) relative to the top holding intersection line (L).

5. The ultra-thin packaging container according to claim 3, characterized in that: A limiting block (224) is provided on the inner side surface of the outer groove wall (223), and the lower edge of the outer straight edge (216) abuts against the upper side of the limiting block (224).

6. The ultra-thin packaging container according to claim 3, characterized in that: The lower edge of the outer straight edge extends laterally outward and then vertically upward to form a groove (317). The lower edge of the outer groove wall is provided with an embedded portion extending laterally outward. When the cover body covers the box body, the embedded portion is embedded in the groove (317).

7. The ultra-thin packaging container according to claim 6, characterized in that: A limiting block is provided on the inner side surface of the outer side wall of the groove (317); when the cover body covers the box body, the embedded portion is located below the limiting block, and when viewed vertically, the projection of the limiting block at least partially overlaps with the projection of the embedded portion.

8. The ultra-thin packaging container according to claim 4, characterized in that: One of the outer straight edge (216) and the outer groove wall (223) at least partially extends vertically, and the other of the outer straight edge (216) and the outer groove wall (223) at least partially tilts outward as it extends downward, so as to cooperate to form the separation zone (S), the top holding intersection line (L) and the deformation self-locking zone (D).

9. The ultra-thin packaging container according to claim 1, characterized in that: The deformation self-locking area (D) is flat in a vertical cross-section after the packaging container lid is closed in place.

10. The ultra-thin packaging container according to any one of claims 1 to 9, characterized in that: The width of the deformation self-locking zone (D) is 0.5-10 mm.

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