Containers and boxes

Abstract

To provide a container and a box which are capable of releasing an internal pressure even when heated with a sealing film attached.SOLUTION: A pressure relief convex block 105 is located in a pressure relief structure, the pressure relief convex block makes contact with an inner edge, and the pressure relief convex block includes a pressure relief curved surface. The pressure relief curved surface and a peripheral plane are connected to each other, and when the peripheral plane and a sealing film come into contact with each other to close a storage space, the pressure relief curved surface and the sealing film come into contact with each other, and a gap is formed at a point where the pressure relief curved surface and the peripheral plane are connected to each other.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a container or box for heating food, and in particular to a container or box comprising such a container for heating food in a microwave oven. [Background technology]

[0002] To meet the eating lifestyles of users who value convenience and speed, many convenience stores stock refrigerated / frozen bento boxes filled with food. These refrigerated / frozen bento boxes can also be quickly heated in the microwave when needed, allowing customers to enjoy hot food in a short amount of time.

[0003] In addition, this type of lunch box usually isolates the food inside from the external environment by attaching a sealing film to the lunch box, thereby reducing the influence of the external environment and preserving the food inside. Summary of the Invention [Problem to be solved by the invention]

[0004] However, this type of lunch box requires heating, and when the lunch box is heated, the moisture in the food and other items inside the container turns into steam, causing the pressure inside the container to rise.

[0005] Generally, before heating using a microwave oven or the like, in order to prevent excessive pressure from building up inside, it is necessary to peel off a portion of the sealing film or use a sharp object to create a notch or opening in the sealing film to prevent pressure from building up inside.

[0006] However, if for some reason the sealing film is not removed or part of the sealing film is not cut, and part of the lunch box is left unopened, resulting in no pressure vent being formed. Since there is no place for the internal pressure to escape, the lunch box may swell and burst from the side, causing the contents of the lunch box to splash onto the inside walls or the microwave door. When this happens, not only is food wasted, but the microwave oven must then be cleaned afterward to remove the food that has stuck to it. If a store employee or other person tries to remove the lunch box from the microwave, the lunch box may explode from the side, causing the contents of the lunch box to splash out, creating a safety concern for both the store employee and the customer. [Means for solving the problem]

[0007] In view of the above problems, the present invention has the following configuration.

[0008] A container having a bottom, a sidewall, a periphery, and a pressure relief convex block, the side wall and the bottom surface are in contact with each other, and the side wall and the bottom surface form a storage space that communicates with the outside of the container; the peripheral portion is connected to the side wall and surrounds the accommodating space, the peripheral portion includes a peripheral plane, an inner edge, an outer edge, and a pressure relief structure, the inner edge and the outer edge are respectively connected to the peripheral plane, the inner edge is located on a side of the peripheral plane closer to the accommodating space, the outer edge is located on a side of the peripheral plane farther from the accommodating space, and the pressure relief structure is located on the peripheral plane; the pressure relief convex block is located within the pressure relief structure, the pressure relief convex block contacts the inner edge, the pressure relief convex block includes a pressure relief curved surface, the pressure relief curved surface and the peripheral edge plane are connected to each other; When the peripheral plane and the sealing film come into contact with each other to close the receiving space, the pressure relief curved surface and the sealing film also come into contact with each other, and a gap is formed between the pressure relief curved surface and the sealing film at the location where the pressure relief curved surface and the peripheral plane connect to each other. A container characterized by:

[0009] The pressure relief convex block has a shortest distance from the outer edge, and the shortest distance is equal to or less than half the width of the peripheral edge plane. 2. The container according to claim 1 .

[0010] The pressure relief structure further includes an auxiliary pressure relief protruding block that is spaced from the bottom surface and protrudes toward the peripheral plane, The auxiliary pressure relief convex block has an auxiliary pressure relief curved surface for contacting the sealing film, and the auxiliary pressure relief curved surface and the peripheral flat surface are connected to each other, but the auxiliary pressure relief convex block does not contact the inner edge of the peripheral portion. 2. The container according to claim 1 .

[0011] The pressure relief structure is provided with at least two adjacent pressure relief convex blocks, and the auxiliary pressure relief convex block is at least partially located between the two adjacent pressure relief convex blocks. 4. The container according to claim 3.

[0012] Furthermore, the minimum two pressure relief convex blocks are adjacent to each other and are in contact with each other, and are perpendicular to the extension direction of the peripheral plane, and an imaginary line passing through the points where the minimum two pressure relief convex blocks are adjacent to each other passes through the auxiliary pressure relief convex block. 5. The container according to claim 4.

[0013] In addition, the auxiliary pressure relief convex block and the at least two pressure relief convex blocks are in contact with each other. 6. A container according to claim 4 or 5.

[0014] The maximum width of the auxiliary pressure relief convex block in the direction of extension of the peripheral plane is not shorter than the distance between the two centers of the minimum two pressure relief convex blocks, but is not greater than the maximum width of the minimum two pressure relief convex blocks in the direction of extension of the peripheral plane. 7. The container according to claim 6.

[0015] The pressure relief structure includes at least two adjacent pressure relief convex blocks, and the pressure relief channel is formed between the pressure relief curved surfaces of the two pressure relief convex blocks. 2. The container according to claim 1 .

[0016] The pressure relief structure further includes at least two auxiliary pressure relief convex blocks spaced apart from the bottom surface and projecting toward the peripheral plane, The at least two auxiliary pressure relief convex blocks are adjacent to each other and have auxiliary pressure relief curved surfaces for contacting the sealing film, and the auxiliary pressure relief curved surfaces and the peripheral flat surface are connected to each other, but the at least two auxiliary pressure relief convex blocks do not contact the inner edge of the peripheral portion, and an auxiliary pressure relief channel is formed between the auxiliary pressure relief curved surfaces of the at least two auxiliary pressure relief convex blocks, and the pressure relief channel and the auxiliary pressure relief channel are connected to each other. 9. The container according to claim 8.

[0017] Furthermore, the minimum two auxiliary pressure relief convex blocks are in contact with each other, and the minimum two pressure relief convex blocks are in contact with each other, Furthermore, any one of the at least two auxiliary pressure relief convex blocks and any one of the at least two pressure relief convex blocks are in contact with each other, and any other one of the at least two auxiliary pressure relief convex blocks and any other one of the at least two pressure relief convex blocks are in contact with each other. 10. The container according to claim 9.

[0018] Further, in an area surrounded by the minimum two auxiliary pressure relief convex blocks and the minimum two pressure relief convex blocks, another auxiliary pressure relief convex block is provided. 2. The container according to claim 1 .

[0019] In addition, the other auxiliary pressure relief convex block, the minimum two auxiliary pressure relief convex blocks, and the minimum two pressure relief convex blocks are in contact with each other. Container according to claim 11.

[0020] Furthermore, the minimum two pressure relief convex blocks are not in contact with each other, the minimum two auxiliary pressure relief convex blocks are not in contact with each other, and other auxiliary pressure relief convex blocks are provided in an area surrounded by the minimum two pressure relief convex blocks and the minimum two auxiliary pressure relief convex blocks. 2. The container according to claim 1 .

[0021] In addition, the other auxiliary pressure relief convex block, the minimum two auxiliary pressure relief convex blocks, and the minimum two pressure relief convex blocks are all connected to each other. Container according to claim 13.

[0022] Also, a container having a bottom surface, a side wall, a peripheral portion, a convex extension portion, and a concave groove, The side wall and the bottom surface are connected to each other, and a receiving space communicating with the outside of the container is formed between the side wall and the bottom surface, the peripheral portion is connected to the side wall and surrounds the accommodating space, the peripheral portion includes a peripheral plane, an inner edge, and an outer edge, the inner edge and the outer edge are each connected to the peripheral plane, the inner edge is located on a side of the peripheral plane closer to the accommodating space, and the outer edge is located on a side of the peripheral plane farther from the accommodating space; the convex extension portion protrudes from the peripheral plane, the extension direction of the convex extension portion is parallel to the extension direction of the peripheral plane, the convex extension portion has a ceiling surface, the ceiling surface is parallel to the peripheral plane, the groove is located on the peripheral plane, the groove is in contact with the inner edge or the outer edge, and at least a portion of the groove overlaps with the convex extension, so that the groove, the peripheral plane, and the ceiling surface of the convex extension form a ladder structure; When the sealing film is attached to the ladder structure to close the storage space, the sealing film covers the ceiling surface and is attached to a portion of the peripheral plane. A container characterized by:

[0023] The groove extends from the inner edge to the outer edge, and the extending direction of the groove is not perpendicular to the extending direction of the peripheral edge plane. 16. The container of claim 15.

[0024] The groove includes a first groove and a second groove, and the extending direction of the first groove is not parallel to the extending direction of the second groove. 17. The container of claim 16.

[0025] The first groove and the second groove intersect to form an intersection, and the intersection is located on the protruding extension. 18. The container of claim 17.

[0026] The grooves include two of the first grooves and two of the second grooves, and each of the two first grooves intersects with each of the two second grooves to form two intersections. 18. The container of claim 17.

[0027] In addition, one of the two intersections is located on the protruding extension. 20. The container of claim 19.

[0028] In addition, a recessed portion is formed on the protruding extension, and the recessed portion is located between the two first grooves and the two second grooves. 21. The container of claim 20.

[0029] The grooves include a first groove and a second groove, The first groove contacts the inner edge but does not contact the outer edge, 16. The container of claim 15, wherein the second groove contacts the outer edge but does not contact the inner edge.

[0030] The first groove extends from the inner edge onto the protruding portion, and the second groove extends from the outer edge onto the protruding portion. 23. The container of claim 22.

[0031] The extending direction of the first groove and the extending direction of the second groove are both perpendicular to the extending direction of the peripheral plane. 24. The container of claim 23.

[0032] The groove includes two of the first grooves, and the second groove is located between the two first grooves. 25. The container of claim 24.

[0033] The groove includes two second grooves, and the first groove is located between the two second grooves. 25. The container of claim 24.

[0034] In addition, the shortest distance between the first groove and the second groove is shorter than the width of the first groove. 24. The container of claim 23.

[0035] A protrusion is formed at the overlapping portion of the first groove and the protruding extension, and the protrusion extends to the second groove. 28. The container of claim 27.

[0036] Also, a packaging material including the container according to any one of claims 1 to 28 and the sealing film, The sealing film is attached to the peripheral plane and the ceiling surface. A box characterized by: [Effects of the Invention]

[0037] Thus, according to the present invention, a pressure relief convex block is formed on the peripheral plane of the container that comes into contact with the sealing film, and a pressure relief curved surface is formed on the side of this pressure relief convex block that comes into contact with the sealing film, so when attaching the container and the sealing film, the degree of adhesion of the sealing film at the pressure relief curved surface and its periphery is lower than the degree of adhesion of the sealing film at other peripheral planes because it is more difficult to attach the sealing film between the curved surface and the flat surface of the sealing film, and therefore the adhesive strength between the sealing film and the periphery of the pressure relief curved surface is weaker.

[0038] As a result, an adhesive region (pseudo-adhesive region) where the adhesive strength is relatively weak is formed at or around the joint between the sealing film and the pressure relief curved surface or between the pressure relief curved surface and the peripheral flat surface; when heated in a microwave oven to generate steam inside, this weak adhesive strength actually becomes an advantage, as the sealing film located on or around the pressure relief curved surface will peel off first, creating a gap on or around the pressure relief curved surface, connecting the inside and outside of the lunch box and preventing pressure from being trapped inside.

[0039] In this way, the adhesive strength of the pressure relief curved surface of the sealing film or its surrounding area is relatively low, and even if pressure due to steam is generated within the storage space by heating in a microwave oven, the pressure relief convex block is in contact with the inner edge of the peripheral plane and is close to the storage space of the container, so the steam generated by heating in the microwave oven enters the part with weak adhesive strength and tries to escape to the outside, pushing the sealing film aside.

[0040] As a result, even if water vapor is generated in the storage space inside the container covered with the sealing film due to heating in a microwave oven and the internal pressure increases, the pressure of the water vapor passes through a passage (channel) formed in the area where the adhesive strength is weak between the pressure relief convex block and the sealing film and is released to the outside.This has the excellent effect of reducing the possibility of water vapor accumulating inside the lunch box and causing it to burst, even if the store clerk or other person forgets to form a notch or peel off part of the sealing film when placing it in the microwave.

[0041] In another embodiment, a protruding convex extension is formed on the peripheral plane, so that when the container and the sealing film are attached, the convex extension can reduce the adhesion effect between the sealing film and the peripheral plane. Also, a concave groove overlapping the convex extension is formed on the peripheral portion, so that the concave groove further reduces the area of ​​the ceiling surface of the convex extension. Therefore, the concave groove can further reduce the adhesion effect between the sealing film and the convex extension, and thus a pseudo-adhesion area can be formed in the area where the concave groove is located.

[0042] Furthermore, the present application also provides a box including the above-mentioned container and a sealing film, wherein the sealing film is adhered to the peripheral flat surface and the pressure relief curved surface of at least one pressure relief convex block, or to the peripheral flat surface and the ceiling surface of the convex extension portion, thereby sealing food or the like in the storage space of the container.

[0043] The features and advantages of the present invention will be described in detail below with reference to the following embodiments, so that those skilled in the art can easily understand and implement the present invention based on the following embodiments. [Brief explanation of the drawings]

[0044] [Figure 1] 1 is a perspective view of a container for explaining an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged view of a main part of the container of the present invention. [Figure 3A]3 is a side view of the pressure relief convex block when observed from the housing space in FIG. 2, that is, observed from the direction of arrow 3A in FIG. 2. [Figure 3B] 3 is a side view of the pressure relief convex block as viewed along the extension direction of the peripheral plane in FIG. 2, ie, as viewed from the direction of arrow 3B in FIG. 2; [Figure 4] FIG. 3 is an enlarged view of a main part of the container in FIG. 2. [Figure 5] 1A-1 to 1A-4 are enlarged views of essential parts of containers according to a number of embodiments, and 1B-1 to 1B-4 are perspective views of essential parts corresponding to the respective views. [Figure 6] FIG. 2 is an enlarged view of a main part of the container of FIG. [Figure 7] FIG. 10 is a perspective view of a main part according to another embodiment of the present invention. [Figure 8] FIG. 10 is a perspective view of a main part according to another embodiment of the present invention. [Figure 9] Figure 9-(1) is a perspective view of the main part based on another embodiment of the present invention, and Figure 9-(2) is a view from the pressure relief convex block side, observing the pressure relief convex block in Figure 9-(1) from the storage space, that is, observed from the direction of the arrow in Figure 9-(1). [Figure 10] FIG. 10 is a perspective view of a main portion of a container according to another embodiment of the present application. [Figure 11] FIG. 10 is a perspective view of a main portion of a container according to another embodiment of the present application. [Figure 12] FIG. 10 is a perspective view of a main portion of a container according to another embodiment of the present application. [Figure 13] FIG. 10 is a perspective view of a main portion of a container according to another embodiment of the present application. [Figure 14] 14-(1) to 14-(3) are perspective views of the main part of a container according to another embodiment of the present invention. [Figure 15] FIG. 15-(1) is a perspective view of a main part of a container according to another embodiment of the present invention, and FIG. 15-(2) is a top view of a main part of the container shown in FIG. 15-(1). [Figure 16] FIG. 16-(1) is a top view of the main part of a container according to another embodiment of the present invention, and FIG. 16-(2) is a perspective view of the main part of the container shown in FIG. 16-(1). [Figure 17] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 18] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 19] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 20] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 21] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 22] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 23] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 24] FIG. 10 is a top view of a main portion of a container according to another embodiment of the present invention. [Figure 25] FIG. 10 is a perspective view of a container according to another embodiment of the present invention. [Figure 26] FIG. 26 is a perspective view of a main part of the container of FIG. 25. [Figure 27] FIG. 26 is a top view of the main part of the container of FIG. 25. [Figure 28] FIG. 10 is a perspective view of a container according to another embodiment of the present invention. [Figure 29] FIG. 29 is a perspective view of a main part of the container of FIG. 28. [Figure 30] FIG. 29 is a top view of the main part of the container of FIG. 28. DETAILED DESCRIPTION OF THE INVENTION

[0045] In the following, various embodiments will be described to explain the present invention in detail, but these embodiments are only used as examples for explanation and are not intended to limit the protection scope of the present invention. Furthermore, the same components in various drawings are designated by the same reference numerals.

[0046] Additionally, unless otherwise specified, "the" may refer to the singular or the plural. Furthermore, similar terms such as "comprise" and "include" include, but are not limited to, parts, steps, integers, operations, members and sets, or components (e.g., members).

[0047] First Embodiment Referring to Figure 1, which is a perspective view of a container 1 according to an embodiment of the present invention, the container 1 for heated food in this embodiment has a bottom surface 101, a side wall 102 in contact with the bottom surface 101, and a periphery 104.

[0048] The side walls 102 and the bottom surface 101 collectively form a storage space 103 for storing food or the like, and the peripheral portion 104 surrounds the storage space 103 on all sides. The container 1 has an opening on the side opposite the bottom surface 101, and when the container 1 is in an unsealed state, the storage space 103 communicates with the outside of the container 1 through the opening.

[0049] The peripheral portion 104 has a peripheral plane 1041 that comes into contact with the sealing film when sealing the container 1. Since the peripheral portion 104 mainly forms the peripheral plane 1041, as long as the necessary peripheral plane 1041 is provided, the peripheral portion 104 can completely surround the storage space 103 or can surround the storage space 103 discontinuously.

[0050] In the embodiment shown in FIG. 1, the peripheral edge 104 is continuous, completely surrounds the receiving space 103, and has a larger peripheral plane 1041, which improves adhesion between the container 1 and the sealing film.

[0051] Although the container 1 in FIG. 1 is shown as a rectangle with rounded corners when viewed from above, the present invention does not limit the shape of the container 1, and the container 1 may be approximately circular, rectangular, or other polygonal shapes according to actual requirements.

[0052] In this embodiment shown in FIG. 1, the area of ​​the bottom surface 101 of the container 1 is approximately equal to the opening area of ​​the storage space 103, but based on actual implementation requirements, the area of ​​the bottom surface 101 may be smaller or larger than the opening area of ​​the storage space 103.

[0053] Next, explanation will be made with reference to Fig. 2. Here, Fig. 2 is an enlarged view of a main part of the container 1 in Fig. 1 (that is, the part enclosed by the dashed line frame A in Fig. 1).

[0054] In this embodiment, the peripheral plane 1041 of the peripheral portion 104 has an inner edge 1042 close to the receiving space 103 and an outer edge 1043 away from the receiving space 103. The peripheral plane 1041 has a pressure relief convex block 105 that protrudes from the bottom surface 101 onto the peripheral plane 1041, and the pressure relief convex block 105 contacts the inner edge 1042 of the peripheral portion 104.

[0055] In addition, the pressure relief convex block 105 has a pressure relief curved surface 1051 for contacting the sealing film, and the pressure relief curved surface 1051 and the peripheral flat surface 1041 are connected to each other.

[0056] To further explain the shape of the pressure relief convex block 105 in this embodiment, reference is made to FIGS. 3A, 3B and 4. FIG.

[0057] Here, Fig. 3A is a side view of the pressure relief convex block 105 when the pressure relief convex block 105 is observed from the accommodation space 103 in Fig. 2, i.e., observed from the direction of arrow 3A in Fig. 2. Also, Fig. 3B is a side view of the pressure relief convex block 105 observed along the extension direction 1041a of the peripheral plane 1041 in Fig. 2, i.e., observed from the direction of arrow 3B in Fig. 2.

[0058] 4 is an enlarged view of a main part of the container 1 in FIG. 2. In this embodiment, as shown in FIGS. 3A and 3B, the pressure relief convex block 105 is a hemisphere protruding from the peripheral flat surface 1041 and has a curved surface that contacts the peripheral flat surface 1041, and as shown in FIG. 4, the pressure relief convex block 105 contacts the inner edge 1042 of the peripheral portion 104.

[0059] Continuing the description with reference to Figures 3A and 3B, in this embodiment, as shown in Figure 3A, the shape of the pressure relief convex block 105 is seen from the accommodation space 103 toward the pressure relief convex block 105, and left and right contours are defined from the highest point of the pressure relief convex block 105 to its left end and from the highest point of the pressure relief convex block 105 to its right end, and at least a portion of each of the left and right contours has a dome-shaped convex curve that is in contact with the peripheral plane 1041.

[0060] When the pressure relief convex block 105 is viewed from the side along the extension direction 1041a of the peripheral plane 1041, as shown in FIG. 3B, the contour formed between the highest point of the pressure relief convex block 105 in the direction of the outer edge 1043 and the lowest point of the pressure relief convex block 105 has an outward convex curve that is at least partially connected to the peripheral plane 1041.

[0061] 2, 3A, and 3B. In this embodiment, when the storage space 103 of the container 1 is to be closed with the sealing film, the sealing film can be heat-pressed from top to bottom onto the peripheral plane 1041 of the peripheral portion 104 of the container 1 by a device such as a sealing machine.

[0062] In addition, since the pressure relief convex block 105 protrudes from the peripheral plane 1041 in a direction further away from the bottom surface 101, when sealing is performed using a sealing film, the sealing film also comes into contact with the pressure relief curved surface 1051 of the pressure relief convex block 105.

[0063] However, the adhesion effect of the sealing film on the curved surface is relatively poor compared to the adhesion effect of the sealing film on the flat peripheral surface 1041, and the sealing film is particularly difficult to adhere to the joint between the curved surface and the flat peripheral surface 1041. Therefore, when an attempt is made to seal the storage space 103 of the container 1, the sealing film will create a pseudo-adhesion area (a region where the adhesion of the sealing film is relatively poor) on the pressure relief convex block 105 and at least a part of its surroundings.

[0064] In addition, the adhesive strength of the sealing film in the pseudo-adhesion region is relatively low (for example, when a gap is formed with the sealing film at the point where the pressure relief curved surface 1051 and the peripheral flat surface 1041 meet), and the pressure relief convex block 105 is in contact with the inner edge 1042 of the peripheral portion 104 and is close to the storage space 103 of the container 1, so when water vapor generated by heating in the storage space 103 presses against the sealing film, the vapor (water vapor) first penetrates into the fragile part of the structure where the adhesive strength is weak, and pushes the sealing film aside there.

[0065] In other words, a pressure relief channel is formed around the pressure relief convex block 105. As a result, when the internal pressure of the sealed container 1 increases due to water vapor generated by heating, the water vapor can escape to the outside of the container 1 through the pseudo-adhesion region formed between the pressure relief convex block 105 and the sealing film. The escape of water vapor has the effect of releasing the internal pressure of the container 1 even when the sealing film is attached.

[0066] In the specification and claims of this application, the expression "the pressure relief convex block 105 is in contact with the inner edge 1042, or the pressure relief convex block 105 is in contact with the inner edge 1042" also includes a state in which the pressure relief convex block 105 is not in contact with the inner edge 1042 strictly speaking, but there is a negligible gap of 0.1 mm or 0.2 mm between them due to the characteristics of the structure in which a sealing film is attached.

[0067] In short, for ease of understanding, the present application expresses that the pressure relief convex block 105 contacts the inner edge 1042, including a state in which the pressure relief convex block 105 is provided at a position close to the inner edge 1042. Therefore, containers 1 manufactured by third parties with a negligible gap as described above are considered to be within the technical scope of the present invention. In the above embodiment, the projection of the pressure relief convex block 105 onto the peripheral plane 1041 is circular, but the projection shape of the pressure relief convex block 105 onto the peripheral plane 1041 is not particularly limited as long as the pressure relief convex block 105 contacts the inner edge 1042 of the peripheral portion 104 and has a pressure relief curved surface 1051 for contacting the sealing film. Specifically, referring to Figure 5, the upper Figures 5-(a-1) to 5-(a-4) are enlarged top views of key parts of the container 1 in different embodiments, and the lower Figures 5-(b-1) to 5-(b-4) are enlarged oblique views of key parts of the container 1 corresponding to the respective figures, and these are used to make it easier to understand the three-dimensional shape of each pressure relief convex block 105 in Figures 5(a-1) to 5(a-4).

[0068] 5-(a-1) to 5-(a-4), the projection shape of the pressure relief convex block 105 onto the peripheral plane 1041 may be semicircular (as shown in FIG. 5-(a-1)), semi-elliptical (as shown in FIG. 5-(a-2) and FIG. 5-(a-3)), or elliptical (as shown in FIG. 5-(a-4)).

[0069] As described above, as shown in FIG. 1, the pressure in the container 1 can be released using the pressure relief convex block 105, and therefore the area of ​​the peripheral plane 1041 where the pressure relief convex block 105 is present can be considered as a pressure relief structure portion 1044 having a structure for releasing pressure.

[0070] The pressure relief structure 1044 is a self-defined area that will be used later to explain the overall structure of the present invention. The area can be any size (area) on the peripheral plane 1041 as long as the pressure relief convex block 105 is present in the pressure relief structure 1044.

[0071] If necessary, a plurality of pressure relief structures 1044 may be provided on the peripheral plane 1041. For example, as shown in Figure 1, in this embodiment, there are two pressure relief structures 1044 on the peripheral plane 1041, each disposed at a diagonal position of the container 1 on the peripheral plane 1041.

[0072] In this embodiment, the structure between the two pressure relief structures 1044 is the same, but the pressure relief structures of the embodiments of the present application can take various forms, and in addition to the embodiments already introduced in this application, the structures of the multiple pressure relief structures 1044 on the peripheral plane 1041 may be different from each other.

[0073] Furthermore, the pressure relief structure 1044 may be located at any position on the peripheral plane 1041 .

[0074] 1, the pressure relief structure 1044 may be staggered with the preset grip portion 13 of the container 1 so that the user can grip it to help peel off the sealing film (for example, the pressure relief convex block 105 may be disposed on the peripheral plane 1041 without the grip portion 13 on the outside), thereby preventing the user's hands from coming into contact with the steam expelled through the pressure relief structure 1044, reducing the possibility of the user being disturbed or burned.

[0075] Details or other embodiments of the pressure relief convex block 105 that functions as a pressure relief structure within the pressure relief structure 1044 will be further described.

[0076] The following description will continue with reference to Fig. 6 in addition to Fig. 2. Here, Fig. 6, like Fig. 2, is an enlarged view of a main part of the container 1 in Fig. 1, and is a perspective view of the pressure relief convex block 105. In this embodiment, the pressure relief convex block 105 is bilaterally symmetrical.

[0077] That is, the pressure relief convex block 105 has a plane of symmetry P, which is perpendicular to both the peripheral plane 1041 and the extension direction 1041 a of the peripheral plane 1041 .

[0078] By making the pressure relief protruding block 105 symmetrical, the pseudo-bonding area (or pressure relief channel) formed by the sealing seal around the pressure relief protruding block 105 is also approximately symmetrical.

[0079] This makes the pressure relaxation rates on the left and right sides of the pressure relief convex block 105 equal, so that uneven expansion on both sides of the pressure relief convex block 105 is unlikely to occur when the container 1 is covered with the sealing film.

[0080] Next, a description will be given with reference to FIG. 7, which is an enlarged perspective view of a main part of a container 1 according to another embodiment of the present invention.

[0081] In the embodiment shown in FIG. 2 and described above, the pressure relief convex block 105 is a hemisphere as a whole, and therefore the top portion thereof only has a vertex.

[0082] In the embodiment of FIG. 7, which is another embodiment of the present invention, the pressure relief convex block 105 has a ceiling surface (upper surface) 1052 at a position farthest from the peripheral plane 1041 , and the ceiling surface 1052 is parallel to the peripheral plane 1041 .

[0083] By making the ceiling surface 1052 on the pressure relief convex block 105 parallel to the peripheral plane 1041, the degree of adhesion between the sealing film and the pressure relief convex block 105 can be increased, and further, the adhesion between the sealing film and the pressure relief convex block 105 can also be adjusted.

[0084] This will be described with reference to Figure 4. In the above embodiment, the pressure relief convex block 105 contacts only the inner edge 1042 of the peripheral flat surface 1041, and does not contact the outer edge 1043 of the outer peripheral surface 1041.

[0085] At this time, a part of the peripheral flat surface 1041 remains between the pressure relief convex block 105 and the outer edge 1043 of the peripheral flat surface 1041 .

[0086] As a result, when the container 1 is sealed, a flat portion remains on the outside of the pressure relief convex block 105, which allows the sealing film to adhere tightly to this area.While the container 1 itself has a structure that releases internal pressure, a certain degree of adhesion can be expected between the pressure relief structure 1044 and the sealing film, making it difficult to peel off.As a result, the container 1 can also be used to store foods that require higher sealing performance, such as ingredients with a lot of moisture or soups.

[0087] In another embodiment of the present invention, the peripheral plane 1041 between the pressure relief convex block 105 and the outer edge 1043 of the peripheral plane 1041 does not have any grooves, depressions or holes lower than the peripheral plane 1041 or any protrusions higher than the peripheral plane 1041, and the outside of the pressure relief convex block 105 is substantially flat.

[0088] This will be explained with reference to Figure 4. In this embodiment, the outer peripheral surface 1041 as a whole has a width W1 at the location of the pressure relief convex block 105, and there is a minimum distance W2 between the pressure relief convex block 105 and the outer edge 1043 of the outer peripheral surface 1041, and the minimum distance W2 is less than half the width W1 of the outer peripheral surface 1041.

[0089] With the above structure, almost no peripheral flat surface 1041 remains on the outside of the pressure relief convex block 105, so the sealing film does not adhere too closely to the outside of the pressure relief convex block 105, and water vapor passing through the pressure relief channel formed by the pressure relief convex block 105 can be discharged more smoothly.

[0090] In another embodiment, as shown in FIG. 8, the pressure relief protruding block 105 not only contacts the inner edge 1042 of the peripheral flat surface 1041 but also contacts the outer edge 1043 of the peripheral flat surface 1041 .

[0091] In this case, there is almost no flat portion between the pressure relief protruding block 105 and the outer edge 1043 of the peripheral flat surface 1041, so this structure minimizes adhesion between the pressure relief structure portion 1044 and the sealing film.

[0092] For example, when high airtightness is not required in the storage space 103, i.e., when only food with little liquid is present, the structure of Figure 8 makes it easy to peel off the sealing film, thereby preventing the sealing film from remaining on the container 1.

[0093] Next, explanation will be made with reference to Fig. 9. Fig. 9-(1) is an enlarged perspective view of a main part of a container 1 according to another embodiment of the present invention. Fig. 9-(2) is a side view of the pressure relief convex block 105 in Fig. 9-(1) as seen from the housing space 103 side.

[0094] In this embodiment, the pressure relief convex block 105 may have other curved surfaces in addition to the pressure relief curved surface 1051 connected to the peripheral flat surface 1041 .

[0095] 9, the pressure relief convex block 105 in this embodiment has, in addition to the pressure relief curved surface 1051, an additional curved surface 1053 that is not in contact with the peripheral flat surface 1041. The additional curved surface 1053 can be used to further reduce the adhesion between the sealing film and the pressure relief convex block 105 so as to adjust and obtain the desired adhesion effect.

[0096] Next, a description will be given with reference to Fig. 10. Here, Fig. 10 is a perspective view of a main part of a container 1 according to another embodiment of the present invention. In this embodiment, a plurality of pressure relief convex blocks 105 may be provided in the pressure relief structure 1044. For example, as shown in Fig. 10, two adjacent pressure relief convex blocks 105 may be provided in the pressure relief structure 1044.

[0097] The term "adjacent" used here means that no other pressure relief convex blocks 105 exist between the two pressure relief convex blocks 105 in the extension direction 1041a of the peripheral plane 1041.

[0098] There is a space between two adjacent pressure relief convex blocks 105, and since water vapor also passes through this space when passing through the pseudo-bonded region formed between the pressure relief convex blocks 105 and the sealing film, two adjacent pressure relief convex blocks 105 can also be thought of as forming a channel (flow path) through which water vapor passes. In other words, a pressure relief channel 105a exists between the pressure relief curved surfaces 1051 (reference numerals are omitted in FIG. 10 ) of the two pressure relief convex blocks 105.

[0099] Next, a description will be given with reference to Fig. 11. Here, Fig. 11 is a perspective view of the main part of a container according to another embodiment of the present invention.

[0100] In this embodiment, two adjacent pressure relief convex blocks 105 are in contact with each other, and when two adjacent pressure relief convex blocks 105 are in contact with each other, a very narrow pressure relief channel 105a is formed by the two pressure relief convex blocks 105, and water vapor passing through the pressure relief channel 105a is more concentrated. This makes it easier to predict the direction in which water vapor will be released, which is useful for designing the container 1, and has the advantage of being able to place the water vapor outlet away from areas where users handle or grip the container, thereby reducing danger.

[0101] When a plurality of pressure relief convex blocks 105 are present in the pressure relief structure 1044, the shapes of the pressure relief convex blocks 105 may be different.

[0102] For example, if there are multiple pressure relief convex blocks 105 in the pressure relief structure 1044, the pressure relief convex blocks 105 may have different heights (shortest distance between the peripheral plane 1041 and the highest point of the pressure relief convex blocks 105), different contours when viewed from the side, or different shapes when viewed from the top, or both.

[0103] However, if all the pressure relief convex blocks 105 of the pressure relief structure 1044 have the same shape, not only will manufacturing convenience improve, but there is also the advantage that it will help more accurately predict the direction of steam discharge.

[0104] 12 and 13 are enlarged perspective views of the main part of a container 1 according to another embodiment of the present invention.

[0105] 12, the pressure relief structure 1044 may have an auxiliary pressure relief convex block 106. The auxiliary pressure relief convex block 106 basically has the same structural features as the above-described pressure relief convex block 105 (i.e., the auxiliary pressure relief convex block 106 also protrudes from the peripheral flat surface 1041 on the side away from the bottom surface 101, and has an auxiliary pressure relief curved surface 1061 for contacting the sealing film).

[0106] Here, the position where the auxiliary pressure relief convex block 106 is disposed is not particularly limited, except that it is not in contact with the inner edge 1042 of the peripheral flat surface 1041 .

[0107] For example, the auxiliary pressure relief convex block 106 may be separate from the pressure relief convex block 105 as shown in Fig. 12, or may be connected as shown in Fig. 13. Also, the auxiliary pressure relief convex block 106 may or may not be in contact with the outer edge 1043 of the peripheral plane 1041.

[0108] For example, in FIG. 12, the auxiliary pressure relief convex block 106 does not contact the outer edge 1043 of the peripheral plane 1041, whereas in FIG. 13, the auxiliary pressure relief convex block 106 does contact the outer edge 1043 of the peripheral plane 1041.

[0109] In this embodiment, the auxiliary pressure relief convex block 106 can be provided in cooperation with the pressure relief convex block 105. Specifically, as shown in Fig. 14, Fig. 14-(1) to Fig. 14-(3) are perspective views of the main part of the container 1 according to the embodiment of the present invention.

[0110] 14-(1), the pressure relief structure 1044 is formed with two adjacent pressure relief convex blocks 105 and one auxiliary pressure relief convex block 106. The two pressure relief convex blocks 105 are arranged along the extension direction 1041a of the peripheral plane 1041.

[0111] When the two pressure relief convex blocks 105 are observed from the accommodation space 103, the auxiliary pressure relief convex block 106 is at least partially located between the two adjacent pressure relief convex blocks 105. Specifically, in the embodiment shown in FIG. 14-(1), the auxiliary pressure relief convex block 106 is entirely located between the two adjacent pressure relief convex blocks 105.

[0112] By arranging the auxiliary pressure relief convex block 106 in this manner, the auxiliary pressure relief convex block 106 is at least partially disposed in the flow of water vapor released through the pressure relief channel 105a (not shown in FIG. 14-(1)) to disperse the flow of water vapor released through the pressure relief channel 105a, thereby weakening the outflow velocity of the water vapor and reducing the risk of burns even if a user holds or accidentally touches this portion.

[0113] Next, an explanation will be given with reference to Fig. 14-(2). Although there are many parts in common with the embodiment shown in Fig. 14-(1), in the embodiment shown in Fig. 14-(2), two adjacent pressure relief convex blocks 105 in the pressure relief structure 1044 are in contact with each other. At this time, an imaginary line L that passes through the contact point between the two pressure relief convex blocks 105 and is perpendicular to the extension direction 1041a of the peripheral plane 1041 passes through this auxiliary pressure relief convex block 106.

[0114] As described above, when two adjacent pressure relief convex blocks 105 come into contact with each other, a very narrow pressure relief channel 105a can be formed, and in this case, water vapor passing through the pressure relief channel 105a is concentrated in a narrow area.

[0115] This configuration allows the steam flow to be concentrated and guided in the front section (i.e., closer to the inner edge 1042), making it possible to grasp the approximate area of ​​the steam outlet, and in the rear section (i.e., closer to the outer edge 1043), the flow of steam to be released can be redistributed, reducing the possibility of burns if the user holds or accidentally touches this area.

[0116] Next, the following description will be made with reference to Fig. 14-(3). This embodiment has many parts in common with Fig. 14-(2), but in Fig. 14-(3), the auxiliary pressure relief convex block 106 contacts each of the two pressure relief convex blocks 105.

[0117] In other words, the auxiliary pressure relief convex block 106 is then closest to the two pressure relief convex blocks 105 and also closest to the pressure relief channel 105a formed by the two pressure relief convex blocks 105. Therefore, with this configuration, the auxiliary pressure relief convex block 106 can effectively distribute the flow of water vapor discharged from the pressure relief channel 105a.

[0118] The description will be made with reference to Fig. 15. Here, Fig. 15-(1) is an enlarged perspective view of a main part of a container 1 based on another embodiment of the present invention, and Fig. 15-(2) is a top view of a main part of the container 1 in Fig. 15-(1).

[0119] In this embodiment, the auxiliary pressure relief convex block 106 and the pressure relief convex block 105 may have different shapes. For example, the auxiliary pressure relief convex block 106 and the convex block 105 may have different heights (the shortest distance between the peripheral plane 1041 and the highest point of the pressure relief convex block 105 is the height of the pressure relief convex block 105, and the shortest distance between the peripheral plane 1041 and the highest point of the auxiliary pressure relief convex block 106 is the height of the auxiliary pressure relief convex block 106), different contours when viewed from the side, or different contours when viewed from the top. Note that the contours may be different when viewed from the side or the top.

[0120] For example, as shown in FIG. 15-(2), the auxiliary pressure relief convex block 106 has an elliptical outline when viewed from above, and the two pressure relief convex blocks 105 each have a circular outline.

[0121] When the two pressure relief convex blocks 105 are viewed from the storage space 103 side, at least a portion of the auxiliary pressure relief convex block 106 is disposed between two adjacent pressure relief convex blocks 105, so the auxiliary pressure relief convex block 106 can also achieve the aforementioned purpose of dispersing the water vapor flow discharged through the pressure relief channel 105a (reference number omitted in Figure 15-(2)).

[0122] 15-(2) will be described. In particular, in this embodiment, the maximum width L1 of the auxiliary pressure relief convex block 106 in the extension direction 1041a of the peripheral plane 1041 is not narrower than the distance L2 between the centers of the two pressure relief convex blocks 105, and is not greater than the maximum width L3 of the two pressure relief convex blocks 105 in the extension direction 1041a of the peripheral plane 1041.

[0123] This arrangement ensures that the flow of water vapor entering between the two pressure relief convex blocks 105 is effectively dispersed (i.e., the auxiliary pressure relief convex block 106 is large enough to effectively disperse the incoming water vapor flow), and does not cause the water vapor flow to be overly dispersed or ejected with too much force.

[0124] Next, explanation will be made with reference to Fig. 16. Fig. 16-(1) is a top view of a main part based on another embodiment of the present invention, and Fig. 16-(2) is a perspective view of a main part of the container 1 shown in Fig. 16, which supplements Fig. 16-(1).

[0125] In this embodiment, the pressure relief structure 1044 may have a plurality of pressure relief convex blocks 105 and a plurality of auxiliary pressure relief convex blocks 106. By connecting the auxiliary pressure relief channel 106a to the pressure relief channel 105a formed between the plurality of auxiliary pressure relief convex blocks 106, the pressure relief channel 105a becomes substantially extended, and can further guide the flow of water vapor discharged from the pressure relief channel 105a.

[0126] For example, in the embodiment shown in FIG. 16, the pressure relief structure 1044 includes two adjacent convex pressure relief blocks 105 as well as two adjacent auxiliary convex pressure relief blocks 106.

[0127] The two auxiliary pressure relief convex blocks 106 are also in contact with one of the two auxiliary pressure relief convex blocks 105. That is, one of the two auxiliary pressure relief convex blocks 106 and one of the two pressure relief convex blocks 105 are in contact with each other, and one of the two auxiliary pressure relief convex blocks 106 and one of the two pressure relief convex blocks 105 are in contact with each other.

[0128] Therefore, in addition to the pressure relief channel 105a being formed between the pressure relief curved surfaces 1051 of the two pressure relief convex blocks 105, an auxiliary pressure relief channel 106a is further formed between the auxiliary pressure relief curved surfaces 1061 of the two auxiliary pressure relief convex blocks 106, and the pressure relief channel 105a is connected to the auxiliary pressure relief channel 106a.

[0129] As long as the water vapor discharged from the pressure relief channel 105 can flow into the auxiliary pressure relief channel 106a, they are said to be in communication with each other or simply in communication with each other.

[0130] Next, a description will be given with reference to Fig. 17. Here, Fig. 17 is an enlarged top view of a main part of a container 1 according to another embodiment of the present invention.

[0131] 17, an additional auxiliary pressure relief convex block 106' is present in the area surrounded by two adjacently connected auxiliary pressure relief convex blocks 106 and two adjacently connected pressure relief convex blocks 105. Note that the term "adjacent" in "adjacent auxiliary pressure relief convex blocks 106" means that no other auxiliary pressure relief convex block exists between the two auxiliary pressure relief convex blocks 106 in the extension direction 1041a of the peripheral plane 1041.

[0132] As described above, by installing the auxiliary pressure relief convex block 106' in the channel (flow path) formed by the pressure relief channel 105a and the auxiliary pressure relief channel 106a, the steam flow discharged from the pressure relief channel 105a can be dispersed, thereby reducing the momentum of the steam discharged from the auxiliary pressure relief channel 106a and reducing the possibility of burns when the user holds or accidentally touches this area.

[0133] Note that water vapor discharged from pressure relief channel 105a can still flow into auxiliary pressure relief channel 106a, so in the embodiment shown in Figure 17, pressure relief channel 105a remains connected to auxiliary pressure relief channel 106a.

[0134] The following description will be made with reference to Fig. 18. Here, Fig. 18 is a top view of a main portion of a container 1 according to another embodiment of the present invention. In this embodiment, as shown in Fig. 18, another auxiliary pressure relief convex block 106' is provided in an area surrounded by two adjacently connected auxiliary pressure relief convex blocks 106 and two adjacently connected pressure relief convex blocks 105, and the other auxiliary pressure relief convex block 106' can be connected to the two surrounding auxiliary pressure relief convex blocks 106 and the two surrounding pressure relief convex blocks 105, respectively.

[0135] At this time, the other auxiliary pressure relief convex block 106' is closest to the surrounding pressure relief convex blocks 105 and auxiliary pressure relief convex blocks 106, and is closest to the pressure relief channel 105a formed by the two pressure relief convex blocks 105 and the auxiliary pressure relief channel 106a formed by the two auxiliary pressure relief convex blocks 106.

[0136] Therefore, this configuration can more effectively disperse the water vapor flow discharged from the pressure relief channel 105a, slow the flow rate of water vapor entering the second gas channel (auxiliary pressure relief channel 106a), and further reduce the intensity of water vapor discharged from the auxiliary pressure relief channel 106a, thereby further reducing the possibility of burns when a user holds or accidentally touches this area.

[0137] In other embodiments, the pressure relief channel 105a is not limited to being formed between two adjacent pressure relief convex blocks 105, and the auxiliary pressure relief channel 106a is not limited to being formed between two adjacent auxiliary pressure relief convex blocks 106, and the pressure relief channel 105a and the auxiliary pressure relief channel 106a can be communicated with each other without being directly connected.

[0138] Therefore, two adjacent pressure relief convex blocks 105 that form a pressure relief channel 105a do not need to be connected, two adjacent auxiliary pressure relief convex blocks 106 that form an auxiliary pressure relief channel 106a do not need to be connected (contacting), and two adjacent pressure relief convex blocks 105 and two adjacent auxiliary pressure relief convex blocks 106 do not need to be connected to each other, and they can be selected without any particular limitations.

[0139] For example, see Figure 19. In this embodiment, two adjacent pressure relief convex blocks 105 do not contact each other, two adjacent auxiliary pressure relief convex blocks 106 do not contact each other, and two auxiliary pressure relief convex blocks 106 do not contact two pressure relief convex blocks 105.

[0140] In this embodiment, the pressure relief channel 105a is still formed between two pressure relief convex blocks 105, and the auxiliary pressure relief channel 106a is still formed between two auxiliary pressure relief convex blocks 106. Because water vapor discharged from the pressure relief channel 105a can still flow into the auxiliary pressure relief channel 106a, in these embodiments, the pressure relief channel 105a is still connected to the auxiliary pressure relief channel 106a.

[0141] This will be described with reference to Figure 19. As described above, in this embodiment, another auxiliary pressure relief convex block 106' can be further provided in the area surrounded by the two auxiliary pressure relief channels 106 and the two pressure relief convex blocks 105, which can disperse the flow of water vapor discharged through the pressure relief channel 105a, thereby reducing the intensity of the vapor discharged from the auxiliary pressure relief channel 106a.

[0142] Furthermore, in another embodiment of the present invention, as shown in Fig. 20, another auxiliary pressure relief convex block 106' can be in contact with two auxiliary pressure relief convex blocks 106 and two pressure relief convex blocks 105 around its periphery, respectively. This can effectively disperse the flow of water vapor exhausted from the pressure relief channel 105a and weaken the flow rate of water vapor flowing into the second gas channel (auxiliary pressure relief channel 106a).

[0143] In this embodiment, the above-described arrangement of convex blocks can be repeated within the pressure relief structure 1044. An example will be described with reference to Figures 21 and 22, which are enlarged top views of essential parts of a container 1 according to another embodiment of the present invention.

[0144] The embodiment shown in FIGS. 21 and 22 may be seen as replicating the convex block configuration shown in FIGS. 18 and 20 in the pressure relief structure 1044.

[0145] Specifically, the embodiment shown in Figure 21 includes three pressure relief convex blocks 105 connected in series within a pressure relief structure portion 1044 on the peripheral plane 1041, and three auxiliary pressure relief convex blocks 106 arranged along the extension direction 1041a of the peripheral plane 1041 and connected in series.

[0146] Each of the three sequentially connected pressure relief convex blocks 105 is in contact with one of the three sequentially connected auxiliary pressure relief convex blocks 106. Furthermore, an additional auxiliary pressure relief convex block 106' is provided in each of two areas surrounded by six adjacent convex blocks, and each additional auxiliary pressure relief convex block 106' is in contact with the two auxiliary pressure relief convex blocks 106 and the two pressure relief convex blocks 105 around it, respectively.

[0147] In the embodiment shown in FIG. 21, the plurality of convex blocks are arranged on either side of the peripheral plane 1041 in the extending direction 1041a as shown in FIG.

[0148] In other words, in this embodiment, the multiple convex blocks are arranged on either side of the extension direction 1041a in such a manner that "an area surrounded by two adjacent auxiliary pressure relief convex blocks 106 and two adjacent pressure relief convex blocks 105 is provided, and this area is provided with another auxiliary pressure relief convex block 106', and the other auxiliary pressure relief convex block 106', the two outer auxiliary pressure relief convex blocks 106, and the two outer pressure relief convex blocks 105 are in contact with each other."

[0149] 21, the pressure relief structure 1044 on the peripheral plane 1041 can be considered to be a repeat of the arrangement of the convex blocks shown in FIG.

[0150] The following description will be made with reference to Fig. 22, which is an enlarged top view of a main portion of a container 1 according to another embodiment of the present invention. Similarly, in the embodiment shown in Fig. 22, the plurality of convex blocks are arranged on both sides of the peripheral plane 1041 in the extension direction 1041a, as in the arrangement shown in Fig. 20.

[0151] In other words, in this embodiment, the multiple convex blocks are arranged on any one side of the peripheral plane 1041 in the extension direction 1041 so that "two auxiliary pressure relief convex blocks 106 that are adjacent to each other but not in contact with each other and a pressure relief convex block 105 that are adjacent to each other but not in contact with each other jointly surround an area, within which another auxiliary pressure relief convex block 106' is provided, and the other auxiliary pressure relief convex block 106', the two surrounding auxiliary pressure relief convex blocks 106, and the two surrounding pressure relief convex blocks 105 are respectively in contact with each other."

[0152] In the embodiment shown in FIG. 22, the convex blocks shown in FIG. 20 are repeatedly arranged in the pressure relief structure 1044 on the peripheral plane 1041.

[0153] The number of times the convex blocks are repeated is not particularly limited, and all of the repetitions are realized so that the blocks overlap (are arranged so as to overlap), but the above-mentioned arrangements can also be repeated in a manner that does not allow them to overlap.

[0154] Specifically, taking the embodiment shown in Figure 22 described above as an example, the two sets of arrangements on either side of it, as shown in Figure 20, share the central pressure relief convex block 105 and auxiliary pressure relief convex block 106.

[0155] Thus, the two sets of configurations shown in Figure 20 overlap in the embodiment shown in Figure 22. In another embodiment, the two sets of configurations shown in Figure 20 can be directly arranged in the pressure relief structure 1044 without overlapping. In this case, as shown in Figure 20, there is no shared pressure relief convex block 105 and auxiliary pressure relief convex block 106 between the two sets of configurations.

[0156] In the following embodiment of the present invention, of the auxiliary pressure relief convex blocks 106 closest to the outer edge 1043 of the peripheral plane 1041, at least two adjacent auxiliary pressure relief convex blocks 106 are in contact with the outer edge 1043 of the peripheral plane 1041.

[0157] That is, for example, as shown in Figure 23, the arrangement method in Figure 23 itself has much in common with Figure 22, but the auxiliary pressure relief convex blocks 106 are arranged along the extension direction 1041a of the three peripheral planes 1041 close to the outer edge 1043, and each pair of adjacent auxiliary pressure relief convex blocks 106 contacts the outer edge 1043.

[0158] Based on this, the auxiliary pressure relief channels 106a formed by the adjacent auxiliary pressure relief convex blocks 106 are closer to the outer edge 1043, so that the water vapor flowing out of the auxiliary pressure relief channels 106a can be more easily discharged to the outside.

[0159] Next, a description will be given with reference to Fig. 24. In the pressure relief structure 1044 on the peripheral flat surface 1041, a combination of the above-mentioned multiple types of pressure relief convex blocks may be implemented.

[0160] For example, referring to FIG. 24, in this embodiment, the pressure relief structure 1044 on the peripheral plane 1041 can be further arranged on both the left and right sides (the peripheral planes 1041 on both sides of the extension direction 1041a) in the situation where the arrangement of FIG. 18 is provided, thereby increasing the arrangement of the convex blocks as shown in FIG. 13 above.

[0161] Specifically, in the embodiment shown in Figure 24, the middle of the arrangement can be considered as shown in Figure 18, where "two adjacent auxiliary pressure relief convex blocks 106 and two adjacent pressure relief convex blocks 105 surround a region (area). Another auxiliary pressure relief convex block 106' is provided in this area. The other auxiliary pressure relief convex block 106' is then arranged in contact with the two surrounding auxiliary pressure relief convex blocks 106 and the two surrounding pressure relief convex blocks 105, respectively."

[0162] Either of these two side surfaces has a pressure relief convex block 105 and an auxiliary pressure relief convex block 106 joined to the pressure relief convex block 105, and the pressure relief convex block 105 and the auxiliary pressure relief convex block 106 are arranged along a direction perpendicular to the extension direction 1041a of the peripheral plane 1041.

[0163] According to the above-described configuration, additional pressure relief channels can be added on either side of the configuration to regulate the exit of water vapor from the outlet, as shown in FIG.

[0164] Next, the description will be made with reference to Figure 24. Furthermore, if it is desired to adjust the volume of water vapor coming out of the outlet of the additional pressure relief channels on both sides, an additional auxiliary pressure relief convex block 106' may be further provided in the area surrounded by the two adjacent auxiliary pressure relief convex blocks 106 and two adjacent pressure relief convex blocks 105 on both sides.

[0165] As described above, the container 1 of the first embodiment has a pressure relief convex block 105 protruding from its peripheral plane 1041. Therefore, when the sealing film and the container 1 are attached to close the storage space, the adhesion effect of the sealing film on the curved surface is relatively inferior to the adhesion effect of the sealing film on the peripheral plane 1041, and adhesion between a curved surface and a flat surface is also difficult, so the sealing film creates a pseudo-adhesion area on the pressure relief convex block 105 and / or around it.

[0166] As described above, the adhesive strength of the sealing film in the pseudo-adhesive region is relatively low, so when the sealing film is compressed by steam generated in the storage space 103, the steam penetrates into the weak parts of the structure and pushes them away, thereby causing the sealing film to release the pressure.

[0167] <Second embodiment> A second embodiment will be described with reference to Fig. 25. Fig. 25 is a perspective view of a container 1 according to another embodiment of the present invention. The second embodiment differs from the first embodiment in that a convex extension 107 and a concave groove 108 are provided on a peripheral flat surface 1041.

[0168] The convex extension 107 protrudes from the peripheral plane 1041. The groove 108 contacts at least one of the inner edge 1042 or the outer edge 1043 (not shown in FIG. 25 but can be seen in FIGS. 26 and 27), and at least a portion of the groove 108 overlaps with the convex extension 107. The second embodiment will be described in detail below.

[0169] Continuing with reference to Figure 25, in the second embodiment, similar to the container of Figure 1, the container 1 for heated food also includes a bottom surface 101, a side wall 102 connected to the bottom surface 101, and a peripheral edge 104. A storage space 103 for storing, for example, food, is formed between the side wall 102 and the bottom surface 101, and the peripheral edge 104 surrounds the storage space 103.

[0170] The container 1 has an opening on the opposite side of the bottom surface 101, and when the sealing film is not yet attached to the container 1, the storage space 103 communicates with the outside of the container 1 through the opening. The peripheral portion 104 has a peripheral plane 1041 that comes into contact with the sealing film when the sealing film is attached to the container 1.

[0171] The peripheral edge 104 may completely surround the receiving space 103 or may discontinuously surround the receiving space 103. In the embodiment shown in Figure 25, the peripheral edge 104 completely and continuously surrounds the receiving space 103.

[0172] The following description will continue with reference to Figure 26 in addition to Figure 25. Figure 26 is a perspective view showing a main part (dashed frame B in Figure 25) of the container 1 for heated food in Figure 25. In this embodiment, the peripheral flat surface 1041 of the peripheral part 104 also has an inner edge 1042 close to the storage space 103 and an outer edge 1043 far from the storage space 103.

[0173] The peripheral plane 1041 has a convex extension 107 formed thereon, which does not contact the inner edge 1042 or the outer edge 1043 and protrudes from the peripheral plane 1041 away from the bottom surface 101. The extension direction of the convex extension 107 is parallel to the extension direction 1041a of the peripheral plane. The convex extension 107 has a ceiling surface 1071, which is parallel to the peripheral plane 1041.

[0174] In this embodiment, the protruding extension 107 completely surrounds the accommodation space 103, but the protruding extension 107 may also discontinuously surround the accommodation space 103. In addition, the peripheral plane 1041 has a groove 108, which contacts at least one of the inner edge 1042 or the outer edge 1043, and the groove 108 at least partially overlaps with the protruding extension 107.

[0175] 25 and 26. As described above, the sealing film can be heat-pressed onto the peripheral flat surface 1041 of the peripheral portion 104 of the container 1 from top to bottom by a device such as a sealing machine.

[0176] In this embodiment, the convex extension 107 is provided on the peripheral plane 1041, so when the container 1 is attached to the sealing film, the sealing film is attached to the peripheral plane 1041 of the convex extension 107 and the ceiling surface 1071. As described above, the convex extension 107 forms a step on the peripheral plane 1041, so that the adhesion effect between the sealing film and the peripheral plane 1041 can be reduced.

[0177] Furthermore, since the peripheral portion 104 has a groove 108 that at least partially overlaps with the convex extension portion 107, the groove 108 further reduces the area of ​​the ceiling surface 1071 of the convex extension portion 107, and therefore the groove 108 can further reduce the adhesion effect between the sealing film and the convex extension portion 107, and a pseudo-adhesion area of ​​the sealing film can be formed in the area having both the convex extension portion 107 and the groove 108.

[0178] Furthermore, the recessed groove 108, the peripheral plane 1041, and the ceiling surface 1071 of the protruding extension 107 are located at three different heights, namely, low, medium, and high, and these three can be considered to form a staircase structure. When the sealing film seals the storage space 103 and is attached to the step structure, the sealing film covers the ceiling surface 1071 and is attached to part of the peripheral plane 1041.

[0179] At this time, as described above, the groove 108 reduces the contact area between the ceiling surface 1071 and the sealing film, and further, the protruding extension 107 and the groove 108 reduce the contact area between the peripheral plane 1041 and the sealing film.

[0180] Since the adhesive strength of the sealing film in the pseudo-adhesion area is relatively low, when steam generated by heating in the storage space 103 presses against the sealing film, the steam passes through the weak parts of the structure and pushes the sealing film aside, providing the function of releasing pressure even when the container 1 is sealed.

[0181] 25 and 26, as described above, the area of ​​the convex extension 107 with the concave groove 108 can be used to help the container 1 release pressure, and therefore the area of ​​the peripheral plane 1041 where both the convex extension 107 and the concave groove 108 are present can be considered as a pressure relief structure 1044 having a structure for releasing pressure.

[0182] In some embodiments, the extension direction of the protruding extension portion 107 only needs to be parallel to the extension direction 1041a of the peripheral plane 1041 of the pressure relief structure 1044. If necessary, a plurality of pressure relief structures 1044 can be provided on the peripheral plane 1041. For example, as shown in FIG. 25 , in this embodiment, the peripheral plane 1041 can be considered to have two pressure relief structures 1044, each provided on the peripheral plane 1041 on either side of the container 1.

[0183] Next, a description will be given with reference to Figures 25, 26, and 27. Here, Figure 27 is a top view showing a main part of the container 1 of Figure 25. In this embodiment, the recessed groove 108 extends from the inner edge 1042 to the outer edge 1043. In other words, the recessed groove 108 not only contacts the inner edge 1042, but also contacts the outer edge 1043.

[0184] Additionally, the extension direction of the groove 108 is not perpendicular to the extension direction 1041a of the peripheral plane 1041. By extending the groove 108 from the inner edge 1042 to the outer edge 1043, the groove 108 can function as an additional channel for steam to help adjust the pressure balance between the inside and outside of the container 1.

[0185] Furthermore, since the extension direction of the groove 108 is not perpendicular to the extension direction 1041a of the peripheral plane 1041, even if the container 1 contains food that requires sealing, such as a large amount of moisture, the moisture is less likely to leak out of the container 1 than with a groove that is perpendicular to the extension direction 1041a of the peripheral plane 1041.

[0186] 26 and 27 will be referred to. In this embodiment, the groove 108 includes a first groove 108a and a second groove 108b. The extension direction of the first groove 108a and the extension direction of the second groove 108b are different, and the extension direction of the first groove 108a and the extension direction of the second groove 108b are not parallel.

[0187] For example, the angle between the extension direction of the first groove 108a and the extension direction of the second groove 108b is 80 degrees to 100 degrees. In this embodiment, the first groove 108a and the second groove 108b intersect with each other to form an intersection I1, which is located on the protruding extension 107.

[0188] By making the extension direction of the first groove 108a different from the extension direction of the second groove 108b and positioning the intersection I1 between the first groove 108a and the second groove 108b on the convex extension portion 107, the ceiling surface 1071 of the convex extension portion 107 can be divided into multiple sub-regions to further reduce the adhesive effect between the sealing film and the convex extension portion 107.

[0189] 26 and 27. In this embodiment, the groove 108 may have a plurality of first grooves 108a having the same extension direction and a plurality of second grooves 108b having the same extension direction.

[0190] Furthermore, in several embodiments, taking the two first grooves 108a and two second grooves 108b closest to the top right of Figure 26 as an example (in Figure 27, these are the two first grooves 108a and second grooves 108b at the right end), it can be seen that one of the two first grooves 108a intersects with the two second grooves 108b to form two intersections.

[0191] 26, the upper right first groove 108a and the upper right two second grooves 108b form intersections I1 and I2, respectively. The other first groove 108a and the upper right two second grooves 108b form intersections I3 and I4, respectively. By intersecting the multiple first grooves 108a and the multiple second grooves 108b, a mesh shape is formed between the multiple grooves 108, and these additional channels can more evenly distribute the exhausted steam.

[0192] 26 and 27, the following description will be continued. In some embodiments, in addition to the situation where "one of the two first grooves 108a intersects with two second grooves 108b to form two intersections" described above, one of the two intersections of the container 1 is located on the convex extension 107. For example, in the embodiment shown in FIG. 26, of intersections I1 and I2, intersection I1 is located on the convex extension 107, and of intersections I3 and I4, intersection I4 is located on the convex extension 107.

[0193] This allows the ceiling surface 1071 of the convex extension 107 to be divided into independent regions, further reducing the adhesion effect between the sealing film and the convex extension 107. Furthermore, in several embodiments, the convex extension 107 has a recessed portion 109, which is located between two adjacent first grooves 108a and two adjacent second grooves 108b. In this embodiment, the recessed portion 109 is located in a region surrounded by intersections I1, I2, I3, and I4 on the convex extension 107. Since the area of ​​the ceiling surface 1071 of the convex extension 107 in this region is further reduced, the adhesion effect between the sealing film and the convex extension 107 is reduced.

[0194] Other aspects of the pressure relief structure 1044 will be further described below. Please refer to Figure 28, which is a perspective view of a container 1 according to another embodiment of the present invention. Similar to the container of Figure 25, in this embodiment, the container 1 also includes a bottom surface 101, a side wall 102 connected to the bottom surface 101, and a peripheral edge 104.

[0195] A storage space 103 for storing, for example, food is formed between the side wall 102 and the bottom surface 101, and the peripheral portion 104 surrounds the storage space 103. In the embodiment shown in Fig. 28, the peripheral portion 104 continuously and completely surrounds the storage space 103. The peripheral portion 104 has a peripheral plane 1041 that comes into contact with the sealing film when the sealing film is attached to the container 1.

[0196] Next, a description will be given with reference to Figures 28 and 29. Figure 29 is a perspective view showing a main part of the container 1 for heated food in Figure 28 (i.e., the dashed frame C in Figure 25). As in the embodiment in Figure 25, in this embodiment too, the peripheral flat surface 1041 has a convex extension 107 that protrudes from the peripheral flat surface 1041 and moves away from the bottom surface 101. The convex extension 107 does not contact the inner edge 1042 or the outer edge 1043.

[0197] The extension direction of the convex extension portion 107 is parallel to the extension direction 1041a of the peripheral plane 1071. The convex extension portion 107 has a ceiling surface 1071, which is parallel to the peripheral plane 1041. The peripheral plane 1041 has a groove 108, which is in contact with at least one of the inner edge 1042 or the outer edge 1043, and which at least partially overlaps with the convex extension portion 107.

[0198] Next, explanation will be made with reference to Figures 28, 29, and 30. Here, Figure 30 is a top view showing a main part of the container 1 of Figure 28. The difference from the embodiment of Figure 25 is that the groove 108 of the embodiment shown in Figures 28, 29, and 30 includes a first groove 108a and a second groove 108b. The first groove 108a contacts the inner edge 1042 but does not contact the outer edge 1043, and the second groove 108b contacts the outer edge 1043 but does not contact the inner edge 1042.

[0199] 30 , the first groove 108a extends from the inner edge 1042 to the convex extension 107, and the second groove 108b extends from the outer edge 1043 to the convex extension 107. In addition, in this embodiment, the extension direction of the first groove 108a and the extension direction (longitudinal direction) of the second groove 108b are both perpendicular to the extension direction 1041a of the peripheral plane 1041.

[0200] In this embodiment, the first groove 108a and the second groove 108b extend to the convex extension 107, but do not penetrate the convex extension 107, and do not directly connect the inner edge 1042 and the outer edge 1043. Therefore, when the container 1 is subsequently sealed, a sealing film can be attached to the portion of the convex extension 107 that does not overlap with the first groove 108a and the second groove 108b.

[0201] Therefore, even if the (longitudinal) extension direction of the first groove 108a and the second groove 108b is perpendicular to the extension direction 1041a of the peripheral plane 1041, the liquid such as soup contained in the containing space 103 does not directly flow out through the first groove 108a or the second groove 108b. However, the first groove 108a and the second groove 108b still reduce the area of ​​the ceiling surface 1071 of the convex extension 107, so that a pseudo-adhesion region may still be formed between the sealing film and the convex extension 107 to allow steam in the containing space 103 to escape.

[0202] 29 and 30, the following description will be continued. In this embodiment, a second groove 108b is present between two adjacent first grooves 108a. As a result, steam guided into the two first grooves 108a passes through the pseudo-adhesion region formed by the protruding extensions 107 and the sealing film, and is discharged from the adjacent second groove 108b.

[0203] In other words, by having a configuration "having a second groove 108b between two adjacent first grooves 108a," the two first grooves 108a and the second groove 108b can form a flow path that guides steam to the outside of the container 1. Note that "two adjacent first grooves 108a" here means that there is no other first groove 108a between the two first grooves 108a.

[0204] 29 and 30, the following description will be continued. In this embodiment, a first groove 108a is present between two adjacent second grooves 108b. As a result, steam guided to the first groove 108a can diffuse to the two adjacent second grooves 108b through the pseudo-adhesion region formed between the protruding extension 107 and the sealing film, and can be discharged from the two second grooves 108b. Similarly, the phrase "two adjacent second grooves 108b" here means that there is no other second groove 108b between the two second grooves 108b.

[0205] Continuing the description with reference to Figure 30. In this embodiment, the width W3 of the first groove 108a is the same as the width W4 of the second groove, but is not limited to this. Furthermore, in this embodiment, the shortest distance L4 between the first groove 108a and the second groove 108b is shorter than the width W3 of the first groove 108a.

[0206] By making the shortest distance L4 between the first groove 108a and the second groove 108b shorter than the width W3 of the first groove 108a, the amount of steam guided through the first groove 108a can push out the pseudo-adhesion area formed between the sealing film and the convex extension portion 107 and enter the second groove 108b.

[0207] Continuing the explanation with reference to FIG. 30, the portion where the first groove 108a and the convex extension 107 overlap has a protrusion 108a1 extending toward the second groove 108b. By providing the protrusion 108a1, the shortest distance L4 between the first groove 108a and the second groove 108b can be further shortened. In this embodiment, as shown in FIG. 30, protrusions 108a1 may be provided on both sides of the first groove 108a between two adjacent second grooves 108b. As described above, the present application provides a container 1 having a pressure release function even when a film is attached, and a container 1 with a sealing film.

[0208] The container 1 of the first embodiment is provided with a pressure relief convex block 105 protruding from its peripheral flat surface 1041, and the pressure relief convex block 105 has a pressure relief curved surface 1051 for contacting the sealing film.

[0209] Therefore, when a sealing film is attached to the container 1 to seal the storage space 103, even if the sealing film is attached to the pressure relief curved surface 1051, it does not adhere as firmly as it does to the peripheral flat surface 1041, and the sealing film does not adhere with sufficient strength to the pressure relief curved surface 1051 or near the connection point between the pressure relief curved surface 1051 and the peripheral flat surface 1041.

[0210] Therefore, the sealing film has a pseudo-adhesive area formed on and / or around the pressure relief protruding block 105 .

[0211] Furthermore, in the second embodiment, the container 1 has a convex extension 107 on its peripheral plane 1041, which can reduce the adhesive effect between the sealing film and the peripheral plane 1041. Furthermore, the peripheral portion 104 has a recessed groove 108 that overlaps with the convex extension 107. The recessed groove 108 further reduces the area of ​​the ceiling surface 1071 of the convex extension 107, thereby further reducing the gap between the recessed groove 108 and the convex extension 107. This reduction in adhesive effect forms a pseudo-adhesion region in the region of the convex extension 107 where the recessed groove 108 is formed. Therefore, when water vapor is generated in the storage space 103 inside the container 1 sealed with the sealing film by heating in a microwave oven or the like and the pressure inside the storage space 103 increases, the water vapor is easily discharged through the pseudo-adhesion region, and the container 1 has a pressure-releasing function when heated, even when the sealing film is attached.

[0212] Although the technical contents of the present invention have been disclosed above along with preferred embodiments, the present invention is not limited thereto, and any changes or modifications made by a person skilled in the art without departing from the spirit of the present invention will still fall within the technical scope of the present invention. The scope of protection of the present invention should be determined based on the claims. [Explanation of symbols]

[0213] 1 container 101 bottom 102 Side wall 103 Containment Space 104 Periphery 1041 Peripheral Plane 1041a Stretching direction 1042 Common-law marriage 1043 Outer Edge 1044 Pressure relief structure 105 Pressure relief convex block 105a Pressure Relief Channel 1051 Pressure relief surface 1052 Ceiling surface 1053 Additive Surface 106, 106' Auxiliary pressure relief convex block 106a Auxiliary pressure relief channel 1061 Auxiliary pressure relief surface 107 Convex extension part 1071 Convex extension ceiling surface 108 Groove 108a First groove 108a1 Protrusion 108b Second groove 109 Concave part A, B, C dashed frame I1, I2, I3, I4 intersection L straight line L1, L3 maximum width L2 distance L4 Shortest distance W1 width W2 Shortest distance W3, W4 width P symmetry plane

Claims

1. A container having a bottom surface, a side wall, a periphery, a convex extension, and a concave groove, The side wall and the bottom surface are connected to each other, and a receiving space communicating with the outside of the container is formed between the side wall and the bottom surface, the peripheral portion is connected to the side wall and surrounds the accommodating space, the peripheral portion includes a peripheral plane, an inner edge, and an outer edge, the inner edge and the outer edge are each connected to the peripheral plane, the inner edge is located on a side of the peripheral plane closer to the accommodating space, and the outer edge is located on a side of the peripheral plane farther from the accommodating space; the convex extension portion protrudes from the peripheral plane, the extension direction of the convex extension portion is parallel to the extension direction of the peripheral plane, the convex extension portion has a ceiling surface, the ceiling surface is parallel to the peripheral plane, the groove is located on the peripheral plane, the groove is in contact with the inner edge or the outer edge, and at least a portion of the groove overlaps with the convex extension, so that the groove, the peripheral plane, and the ceiling surface of the convex extension form a ladder structure; When the sealing film is attached to the ladder structure to close the storage space, the sealing film covers the ceiling surface and is attached to a portion of the peripheral plane. A container characterized by:

2. The groove extends from the inner edge to the outer edge, and the extending direction of the groove is not perpendicular to the extending direction of the peripheral plane.

2. The container of claim 1.

3. The groove includes a first groove and a second groove, and the extending direction of the first groove is not parallel to the extending direction of the second groove.

3. The container of claim 2.

4. The first groove and the second groove intersect to form an intersection, and the intersection is located on the protruding extension.

4. The container of claim 3.

5. The grooves include two of the first grooves and two of the second grooves, and each of the two first grooves intersects with the two second grooves to form two intersections.

4. The container of claim 3.

6. One of the two intersections is located on the protruding portion.

6. The container of claim 5.

7. A recess is formed on the protruding extension, and the recess is located between the two first grooves and the two second grooves.

7. The container of claim 6.

8. The groove includes a first groove and a second groove; The first groove contacts the inner edge but does not contact the outer edge; 2. The container of claim 1, wherein the second groove contacts the outer edge but does not contact the inner edge.

9. The first groove extends from the inner edge onto the protruding portion, and the second groove extends from the outer edge onto the protruding portion.

9. The container of claim 8.

10. The extending direction of the first groove and the extending direction of the second groove are both perpendicular to the extending direction of the peripheral plane.

10. The container of claim 9.

11. The groove includes two of the first grooves, and the second groove is located between the two first grooves. Container according to claim 10.

12. The groove includes two second grooves, and the first groove is located between the two second grooves. Container according to claim 10.

13. The shortest distance between the first groove and the second groove is shorter than the width of the first groove.

10. The container of claim 9.

14. A protrusion is formed at the overlapping portion of the first groove and the protruding extension, and the protrusion extends to the second groove. Container according to claim 13.

15. The container according to any one of claims 1 to 14 and the sealing film, The sealing film is attached to the peripheral plane and the ceiling surface. A box characterized by:

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