Technical field

The invention relates to the field of containers and containers with airtightness, in particular to the field of fiber-based lunch boxes and cups.

Background

At present, the business mode of "takeaway" in the catering industry is in a state of continuous growth. In order to provide high-quality services, out of consideration of health, hygiene and environmental protection, businesses that provide food processing have begun to use more environmentally friendly fiber-based containers to replace the usual plastic containers. In addition, merchants are also concerned that the food they provide can be delivered to customers in a better condition to improve their competitiveness, wherein the food is not expected to escape from the packaging during delivery.

However, when switching from plastic containers to fiber-based containers made from natural fibers such as cellulose, e.g. molded fiber containers, it was found that there were problems in converting the sealing structures used on plastic containers to fiber- based containers. When the sealing structure of the plastic container is used in the fiber-based container, due to the different material properties, on the one hand, when the upper cover of the fiber-based container is opened, the fiber-based container tends to tear; it springs open and therefore cannot be stably fixed on the container body, thereby requiring a larger fitting gap between the sealing parts of the container, which in turn makes it impossible to provide a satisfactory sealing effect. To this end, it has been proposed to add a tongue structure to solve the problem of undesired popping. However, the tongue-inserting structure is not easy for the food processing business to operate when completing the packaging, and also affects the appearance of the container.

To sum up, there is a need for a new type of container, especially a fiber-based container, which can provide better sealing and at the same time make it difficult for the container lid and the main body to spring open.

Summary of the invention

The present invention solves the above technical problems by proposing a container with a new sealing structure. The invention provides a container, which is characterized in that the container comprises: a container, characterized in that the container comprises: a main body having a first sealing structure, and an upper cover which is capable of covering the main body along an axis of installation and has a second sealing structure matching the first sealing structure, the first sealing structure comprising a protrusion for sealing, the protrusion for sealing comprising a first outer rim and a first inner rim, the second sealing structure comprising a recess for sealing which is cooperated with the protrusion for sealing, the recess for sealing comprising a second outer rim and a second inner rim; wherein the first outer rim abuts against the second outer rim, and wherein the first inner rim abuts against the second inner rim to form a first sealing engagement, and the first sealing structure also comprises a first additional inner rim, the second sealing structure also comprises a second additional inner rim, and the first additional inner rim abuts against the second additional inner rim to form a second engagement section for sealing.

Compared with the prior art, the container of the present invention at least achieves the following beneficial effects.

The upper cover of the container of the invention is not easy to bounce off the main body and has a good fixing effect. This is achieved by the cooperation between the corresponding sealing structures of both the main body and the upper lid of the container according to the present invention. Specifically, the sealing engagement between the first inner edge and the first additional inner edge of the first sealing structure part of the main body and the second inner edge and the second additional inner edge of the second sealing structure part of the upper cover forms the upper double seal between lid and body. These sealing engagements are achieved with an interference fit between the corresponding parts. In addition, the arrangement of the first outer edge of the first sealing structure part of the main body against the second outer edge of the second sealing structure part of the upper cover not only makes the upper cover difficult to fall off from the main body, but also strengthens the aforementioned double sealing structure, and provides a tighter sealing engagement.

In one embodiment, the first sealing structure portion includes a first connecting portion connecting the first inner edge and the first additional inner edge, and the second sealing structure portion includes connecting the second inner edge and the second connecting portion of the second additional inner edge. The first and second connection parts separate the two sealing structures in part and provide the possibility of providing other structures at the first and second connection parts to further improve the sealing.

In one embodiment, an air chamber is formed by the body and the upper cover between the first sealing joint and the second sealing joint. The fact that the air chamber is between the first sealing joint part and the second sealing joint part means that an annular sealing air chamber is formed between the upper cover and the main body. The contents are difficult to leak, which is particularly advantageous where the contents include liquids. Therefore, the air chamber enhances the tightness of the entire container.

In one embodiment, an air chamber is formed between the first connection portion and the second connection portion. Thereby, other structures are provided using the existing first connection portion and the second connection portion to further improve the sealing performance, as described above.

In a preferred embodiment, the first connecting portion is provided with a concave portion forming the air chamber. In this preferred embodiment, the air chamber is formed by the recessed portion of the first connecting portion and the second connecting portion, whereby the space already occupied by the first sealing joint and the second sealing joint is utilized to form the air chamber, without using additional space.

In one embodiment, a first circular arc segment with a first radius of curvature is disposed between the first inner edge and the first additional inner edge, and the second inner edge and the second additional inner edge. A second arc segment with a second radius of curvature is disposed between the edges, wherein the first arc segment abuts the second arc segment and the first radius of curvature is smaller than the second arc segment radius of curvature. The setting of the circular arc section and the curvature radius in this embodiment enables the first circular arc section and the second circular arc section to be closely abutted, thereby ensuring the tightness of the second sealing joint.

In a preferred embodiment, the second outer edge has on at least a part thereof a protrusion protruding toward the interior of the sealing recess, the protrusion stopping the disengagement of the end of the first outer edge. The disengagement arrangement of the protruding portion to stop the first outer edge not only makes the upper cover firmly fixed on the main body and is not easy to spring off, but also strengthens the aforementioned double sealing structure.

In a preferred embodiment, the end of the first outer edge is provided with a raised portion facing the second outer edge, and the raised portion abuts against the second outer edge. The protruding portion makes the upper cover not easily deformed, and its cooperation with the upper cover enhances the stability of the upper cover being fixed on the main body. Due to the use of the protruding part of the second outer edge and the protruding part of the first outer edge, the upper cover forms an " inverted structure " relative to the main body , which not only prevents the upper cover of the container from popping open, but also does not like the existing products in which the tongue-insert structure in the technology will affect the aesthetics of the appearance. In addition, the " inverted buckle structure" is also more convenient in use than the tongue insertion structure. The container of the present invention is more advantageous when the container is made of a material that is easy to pop open, for example, in the case of using paper plastic, plastic or other materials, especially paper plastic material.

In a preferred embodiment, the protrusions extend along the entire circumference. The arrangement of the protrusions extending along the entire perimeter makes it possible to provide additional sealing engagement between the second outer edge of the upper cover and the first outer edge of the body.

In a preferred embodiment, the container is formed of a fiber-based material.

In a preferred embodiment, the container is a molded fiber container.

In a preferred embodiment, the container is a lunch box or a cup.

Brief description of the figures

Figure 1 is a perspective view of one embodiment of a container according to the present invention, wherein an upper lid covers the main body;

Figure 2 is a perspective view of one embodiment of the container according to the present invention in Fig. 1, wherein the upper lid is separated from the main body; and

Figure 3 is a cross-sectional view showing the sealing structure between the main body and the upper cover of the container according to the present invention, the cross section including the mounting axis along which the upper cover is mounted on the main body.

Detailed description

In this part, the container of the present invention will be described and explained in detail by taking the embodiments of the present invention as examples in conjunction with the accompanying drawings. It should be noted that the description of such embodiments is illustrative and explanatory and is not intended to limit the scope of the invention in any way. The present invention is not limited to this specific embodiment.

The container of the invention is proposed in order to solve the problems caused by the container made of fiber-based material, which is difficult to fix, easy to pop open and has poor sealing performance. However, the container of the present invention is not limited to the container made of fiber-based material. Those skilled in the art will readily understand that containers made of other materials may also have the advantages described in the present invention.

The present invention provides a container, and Figures 1 and 2 show an embodiment of the container implemented as a lunch box. The container may be a fiber-based container, such as a molded fiber lunch box or a cup. As shown in Figures 1 and 2, the container includes an upper lid 200 and a main body 100. In order to clearly describe the container according to the present invention , an orthogonal coordinate system XYZ is established, wherein the X axis and the Y axis together define the plane on which the bottom surface of the container is located when the container is placed normally, such as a table top. Z axis is perpendicular to X The Y plane corresponds to the direction from the container body 100 toward the upper cover 200. In Figure 1, the Z-axis is at the center of the container, and the direction toward the center is called the inside, and the direction opposite the inside is called the outside. The body 100 shown in FIGS. 1 and 2 has a substantially circular cross-section perpendicular to the axis Z, that is, the body 100 is in the shape of a circular bowl. It should be understood that the main body 100 can also have other shapes and cross sections , such as oval shape, etc., as long as the main body and the upper cover of the container can apply the sealing structure according to the present invention.

The container and its sealing structure according to the present invention will be described below with reference to FIG. 3.

Figure 3 is a partial cross-sectional view of the container's upper lid 200 when it is closed on the body 100 , the cross-section including the central longitudinal axis Z of the container, in the example of the circular bowl-shaped container shown in Figure 1, the transverse cross-section the cross section is the plane formed by the central longitudinal axis Z and the radius of the circle. And in the orientation shown in Figure 3, most of the volume of the container is located to the right of the partial structure (not shown). As shown in FIG. 3, the main body 100 has a first sealing structure part 110, and the first sealing structure part 110 has a sealing protrusion including a first outer edge 111 and a first inner edge 113. The sealing protrusion may further include a first upper top portion 112 that connects the first outer edge 111 and the first inner edge 113 and is located therebetween. The upper cover 200 has a second sealing structure part 210 , the second sealing structure part 210 includes a sealing concave part matched with the sealing protrusion, and the sealing concave part includes a second outer edge 211 and a second inner edge 213. The sealing recess may further include a second upper top portion 212 connecting the second outer edge 211 and the second inner edge 213 and being located therebetween.

The first outer edge 111 abuts against the second outer edge 211. The first inner edge 113 abuts the second inner edge 213 to form the first sealing joint 300. An interference fit is formed between the first inner edge 113 abutting against the second inner edge 213. Further, the first sealing structure part 110 further includes a first additional inner edge 114, the second sealing structure part 210 further includes a second additional inner edge 214, and the first additional inner edge 114 abuts against the second additional inner edge 214, so as to A second sealing joint 400 is formed. The first additional inner edge 1 14 and the first outer edge 1 11 are located on both sides of the first inner edge 113. The second additional inner edge 2 14 and the second outer edge 2 11 are located on both sides of the second inner edge 213. As shown in FIG. 3 , the sealing convex portion and the sealing concave portion are tightly fitted in a matching manner by the abutment between the first sealing engagement portion 300, the second sealing engagement portion 400 , and the first outer edge 111 and the second outer edge 211, to achieve a stable and firm double sealing structure.

The first sealing structure portion 110 includes a first connecting portion 115 connecting the first inner edge 113 and the first additional inner edge 114. The second sealing structure portion 210 includes a second connecting portion 215 connecting the second inner side edge 213 and the second additional inner side edge 214. The second connection portion 215 may extend in a plane substantially parallel to the XY plane. Through the first connecting part 115 and the second connecting part 215, the first sealing joint part 300 and the second sealing joint part 400 can be arranged in a "stepped" manner, wherein the first sealing joint part 300 is higher than the second sealing joint part 300. Two sealing joints 400 and closer to the outer edge.

The two sealing joints arranged in this way achieve double sealing by means of an interference fit. Such an arrangement solves the problem of poor sealing or easy to pop open of the paper- plastic container, and greatly promotes the popularization of the paper- plastic container that uses environmentally friendly materials and has good functionality.

In a preferred embodiment, an air chamber 500 is formed between the main body 100 and the upper cover 200 between the first sealing joint 300 and the second sealing joint 400. The air chamber 500 may be formed between the first connection part 115 and the second connection part 215. Further, the air chamber 500 may be mainly generated by the concave portion of the first connection portion 115. The concave portion of the first connecting portion 115 is recessed away from the second connecting portion 215, thereby forming an annular air chamber between the first connecting portion 115 and the second connecting portion 215. Since the air chamber 500 is provided between the two sealing joints, the atmospheric pressure in the air chamber 500 prevents the liquid in the container from overflowing through the second sealing joint 400, the sealing of the container is further enhanced.

Further, between the first inner edge 113 and the first additional inner edge 114, a first circular arc section 116 with a first radius of curvature is disposed. A second circular arc section 216 with a second radius of curvature is disposed between the second inner edge 213 and the second additional inner edge 214. For example, the first circular arc section 116 may be provided at the junction of the first connecting portion 115 forming the gas chamber 500 and the first additional inner edge 114 , and the second circular arc section 216 may be provided at the junction forming the gas chamber 500. The junction of the second connecting portion 215 of the chamber 500 and the second additional inner edge 214. The first radius of curvature of the first arc segment 116 is smaller than the second radius of curvature of the second arc segment 216 , so that the first arc segment 116 abuts the second arc segment 216 , thereby The tightness of the air chamber 500 is strengthened . As shown in FIG. 3, when the second sealing joint formed by the first additional inner edge 114 and the second additional inner edge 214 and the first sealing joint are arranged in a relative position similar to a step, the second sealing joint and The corresponding first connection part 115 and the second connection part 2 15 can be in good mating contact, and can also produce sealing in the arc section.

Continuing to refer to FIG. 3 , the second outer edge 211 of the upper cover of the container according to the present invention has, on at least a part thereof, a protrusion 217 protruding toward the interior of the sealing recess, and the protrusion 217 can be closed on the upper cover 200 After being mounted on the main body 100, a form fit is formed with the first outer edge 111 of the main body 100 to stop the end of the first outer edge 111 from disengaging from the upper cover.

The first outer edge 111 of the container of the present invention is provided with a raised portion 117 facing the second outer edge 211 , and the raised portion 117 abuts against the first outer edge 211. The protruding portion 117 on the main body 100 can cooperate with the protruding portion 217 on the upper cover 200, so that the engagement between the first outer edge and the second outer edge is more secure.

Protrusions 217 may be discretely distributed on the first outer edge of the upper cover 200, e.g. evenly and spaced apart in the circumferential direction. The protrusion 217 may also extend along the entire periphery of the outer edge of the upper cover 200, and at this time, a seal is formed between the first outer edge 111 and the second outer edge 211 again.

The specific embodiment of the present invention shown in FIG. 3, the container of the present invention solves the problems existing in the prior art, and achieves excellent sealing performance and a fixing effect that is not easy to spring open, even if fiber-based material is used. The same goes for other materials.

It should be understood that the structures described above and illustrated in the accompanying drawings are merely examples of the present invention, which may be replaced by other structures that perform the same or similar functions for achieving the desired end result. Furthermore, it should be understood that the embodiments described above and shown in the accompanying drawings should be regarded as constituting only non-limiting examples of the invention, which may be modified in various ways within the scope of the patent claims.