JP2024080182A - Packaging containers - Google Patents

Abstract

[Problem] It is possible to reduce the possibility of various problems caused by external forces while reducing the possibility of internal pressure increasing. [Solution] A packaging container (1) comprises a container body (20) and a lid (10) that closes the container body. In the closed state, at least a portion of the lid outer edge (13) is located between the lid locking portion (27) and the inner peripheral step (28), and is spaced apart from at least the inner peripheral step. In addition, when the convex portion (134) is spaced apart from the inner peripheral step, an air passage (50) is formed by the convex portion and the inclined surface of the tab accommodating portion (29). [Selected Figure] Figure 8

Description

One aspect of the present invention relates to a packaging container capable of containing food, etc.

Plastic packaging containers for storing food items are used in department stores, supermarkets, etc. Food items are sold in the packaging containers and displayed on display shelves. An example of such a packaging container is disclosed in Patent Document 1.

The packaging container of Patent Document 1 comprises a container body and a lid. A flange located at at least one corner of the container body is provided with an inclined surface portion that slopes outwardly of the container body. The lid is provided with a gripping portion that can be grasped when opening the lid, at a position that coincides with the inclined surface portion when the lid is fitted to the container body (closed lid state). Therefore, the inclined surface portion allows the gripping portion to be flipped up toward the outside of the container body, making it easier to grasp. Furthermore, when the lid is closed, the gripping portion protrudes from the container body to an extent that does not interfere with adjacent packaging containers.

JP 2012-171657 A

If the gripping portion is made to protrude from the container body or to be inclined upwards outward in order to improve ease of gripping when the lid is closed, it becomes easier for a person's hand or other objects to come into contact with the gripping portion. When a person's hand or the like comes into contact with the gripping portion, the force acting on the gripping portion (referred to as an external force) may tear the packaging material (e.g., plastic wrap) that wraps the packaging container, tear the fastener (e.g., tape) that fastens the lid and container body, or cause damage to the packaging container (e.g., dents). Furthermore, there is a risk that the lid may come off the container body due to an external force, and the closed state between the lid and container body may be inadvertently released. In this way, various problems caused by external forces may occur in a packaging container in a closed state.

In addition, the more firmly the lid is closed, the more likely it is that the pressure inside the container (internal pressure) will increase when food or other items stored in the container are heated in a microwave oven or other device. This can lead to the risk of broth from the food leaking out of the container and causing burns.

A tightly closed state refers to a state in which the lid is fitted to the container body and is difficult or impossible to move relative to the container body, making it difficult or impossible to change the relative positional relationship between the lid and the container body.

One aspect of the present invention aims to realize a packaging container that can reduce the possibility of various defects caused by external forces while reducing the possibility of internal pressure increasing.

The packaging container according to aspect 1 of the present invention is a packaging container comprising a container body and a lid body that closes the container body, the lid body having a lid body outer edge portion that is the outer edge of the lid body and a lid body gripping piece that protrudes from a part of the lid body outer edge portion, the container body having a lid locking portion that is located inside a flange portion of the container body and capable of locking the lid body outer edge portion from above, an inner peripheral step portion that is located inside the flange portion and below the lid locking portion and capable of supporting the lid body outer edge portion from below, and the lid body gripping piece is stored while being inclined upwardly toward the outside, and a picking piece storage section whose bottom surface is recessed downward, and the outer edge of the lid has a convex portion that protrudes toward the top plate of the lid at a position opposite the picking piece storage section when the lid is closed on the container body, and when the lid is closed on the container body, at least a portion of the outer edge of the lid is located between the lid locking portion and the inner peripheral step and is spaced apart from at least the inner peripheral step, and when the convex portion is spaced apart from the inner peripheral step, an air passage is formed by the convex portion and the bottom surface of the picking piece storage section.

According to the above configuration, when the lid gripping piece is subjected to an external force in the closed state, at least a portion of the lid outer edge that is spaced apart from the inner peripheral step can be moved downward (towards the inner peripheral step). In other words, the lid can be caused to sink while maintaining the closed state. This movement (sinking) absorbs the external force, reducing the possibility of various malfunctions caused by the external force occurring.

In addition, when the convex portion is separated from the inner peripheral step portion, an air passage is formed by the convex portion and the bottom surface of the tab housing portion, so that the inside of the packaging container in the closed state can be ventilated with the outside. This reduces the possibility of an increase in internal pressure due to a rise in temperature, etc.

In the packaging container according to aspect 2 of the present invention, in aspect 1, the convex portion is positioned between the lid locking portion and the inner peripheral step portion, and moves from a state separated from at least the lid locking portion toward the lid locking portion, thereby forming the air passage.

According to the above configuration, when the internal pressure rises, the lid body is subjected to the action of the increased internal pressure, i.e., a force acting in a direction in which the lid body is removed from the container body. Because the convex portion is spaced away from the lid locking portion, when the force is received, the convex portion moves toward the lid locking portion, forming an air passage. This reduces the possibility of the internal pressure rising.

In the packaging container according to aspect 3 of the present invention, in aspect 1 or 2, the outer edge of the lid has the convex portion at the opposing position, which is a position connected to the base end of the lid gripping piece.

According to the above configuration, the inside of the packaging container can be ventilated in the gripping piece housing in which the lid gripping piece is housed. In addition, a convex portion is formed at a position on the outer edge of the lid that is connected to the base end of the lid gripping piece, so that the strength of that position of the outer edge of the lid can be increased.

In the packaging container according to aspect 4 of the present invention, in aspect 3, the container body has a plurality of the gripping piece housings, and the outer edge of the lid body has the convex portion at a position other than the position connected to the base end as the opposing position, and also at a position opposing at least one of the gripping piece housings.

According to the above configuration, the inside of the packaging container can be ventilated not only in the tab housing section in which the lid tab is housed, but also in the tab housing section in which the lid tab is not housed. This further reduces the possibility of an increase in internal pressure.

In the packaging container according to aspect 5 of the present invention, in aspect 1 or 2, the container body has a plurality of the gripping piece housings, and the outer edge of the lid has the convex portion at a position other than the position connected to the base end of the lid gripping piece as the opposing position, and at a position opposing at least one of the gripping piece housings.

The above configuration allows the interior of the packaging container to be ventilated in the gripping piece housing section where the lid gripping piece is not housed.

In the packaging container according to aspect 6 of the present invention, in any of aspects 1 to 5, when an external force acts on a protruding portion of the lid gripping piece that protrudes from the gripping piece housing portion and the protruding portion moves toward the gripping piece housing portion, at least a portion of the outer edge of the lid body that is spaced apart from the inner peripheral step portion moves downward and comes into contact with the inner peripheral step portion, thereby being supported by the inner peripheral step portion.

According to the above configuration, when the protruding portion of the lid gripping piece is subjected to the action of the external force and moves toward the gripping piece housing portion, at least a portion of the lid outer edge part that is separated from the inner peripheral step part can be moved downward and supported by the inner peripheral step part. Therefore, the above external force applied until the entire lid outer edge part is supported by the inner peripheral step part can be absorbed by the above movement.

In the packaging container according to aspect 7 of the present invention, in any one of aspects 1 to 6, the lid has one lid gripping piece, the container body has an arc-shaped flange portion and a linear flange portion, and the gripping piece housing portion is formed at at least two of the multiple connection positions between the arc-shaped flange portion and the linear flange portion.

According to the above configuration, even if the lid body rotates around an axis passing through the center of the lid body in the closed state, the lid body gripping piece can be accommodated in a gripping piece accommodating section formed at a different connection position without being accommodated in the gripping piece accommodating section that previously accommodated the lid body gripping piece by rotating the lid body once.

According to one aspect of the present invention, it is possible to reduce the possibility of various malfunctions caused by external forces while reducing the possibility of internal pressure increasing.

FIG. 1 is a perspective view of a packaging container according to one embodiment of the present invention. FIG. 2 is a side view of the packaging container. 3 is a plan view of a container body provided in the packaging container. FIG. FIG. 2 is a perspective view of the container body. 4 is an enlarged perspective view of a tab receiving portion of the container body. FIG. FIG. 1 is a plan view of a lid provided on the packaging container. FIG. 11A to 11C are diagrams for explaining the change in position of the lid body when the lid body is fitted inside the container body. 4 is a perspective view of the tab receiving portion and a convex portion of the lid body. FIG.

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.
In this embodiment, a packaging container according to one aspect of the present invention will be described as a packaging container that contains food (foodstuffs) as a contained object, and that includes a container body and a lid. Examples of the above-mentioned food include pizza, okonomiyaki, and assorted side dishes (e.g., a party platter of fried chicken, potatoes, etc.). However, the contained object contained in the packaging container according to one aspect of the present invention is not limited to food.

In this specification, "horizontal" and "vertical (plumbing)" are defined based on the case where the packaging container is placed on a horizontal surface so that the bottom of the container body abuts on the horizontal surface. Also, in this specification, "upper" and "upper side" refer to the direction from the container body toward the lid body when the lid body is fitted to the container body (+Z axis direction), and "lower" and "lower side" refer to the opposite direction (-Z axis direction).

[Packaging containers]
Reference numerals 1001 and 1002 in Fig. 1 are perspective views of the packaging container 1. Fig. 2 is a side view of the packaging container 1. As shown in Fig. 1 and Fig. 2, the packaging container 1 is a container capable of accommodating food or other objects to be contained therein, and includes a lid body 10 and a container body 20. The lid body 10 and the container body 20 are configured such that the lid body 10 closes the container body 20.

In this embodiment, the lid body 10 is configured to fit inside the container body 20. Therefore, in this embodiment, the lid body 10 closing the container body 20 is described as the lid body 10 fitting inside the container body 20. That is, in this embodiment, the state in which the lid body 10 fits inside the container body 20 is the closed state in which the lid body 10 is closed on the container body 20.

In this embodiment, the lid 10 and the container body 20 are each formed by thermoforming a resin sheet having a sheet thickness of 0.1 mm to 4 mm, preferably 0.15 mm to 2.5 mm. The lid 10 and the container body 20 may each have a different sheet thickness. The container body 20 according to this embodiment has a shape that is unlikely to bend when mated with the lid 10, so that the necessary strength can be ensured even if the sheet thickness is thin, such as 0.5 mm or less.

As the resin sheet, for example, a thermoplastic resin sheet such as a polyolefin resin sheet, a polystyrene resin sheet, or a polyester resin sheet can be used. These resin sheets may be foamed sheets or non-foamed sheets. Furthermore, a laminated sheet can be used as the resin sheet. As the laminated sheet, for example, a film-laminated foamed sheet in which a film is laminated to a foamed sheet, a co-extrusion laminate sheet, or an extrusion laminate sheet can be used. As the thermoforming method, for example, vacuum forming, thick air forming, vacuum pressure forming, and hot plate forming can be mentioned.

The colors of the lid 10 and the container body 20 are not particularly limited. The lid 10 is preferably made of a transparent material, and is more preferably colorless and transparent. This allows the contents placed in the container body 20 to be easily visible through the lid 10. The color of the container body 20 may be a single color or may include multiple colors.

The container body 20 may also be patterned. For example, the container body 20 may have a black base color with at least a portion of it having a gold or red pattern. In this embodiment, the lid 10 is colorless and transparent, and the container body 20 is solid black.

[Container body]
Fig. 3 is a plan view (top view) of the container body 20. Fig. 4 is a perspective view of the container body 20. Fig. 5 is an enlarged perspective view of the gripping piece accommodating portion 29. Reference numeral 1011 in Fig. 5 is a view showing a state in which the lid body 10 is not internally fitted into the container body 20, and reference numeral 1012 is a view showing a state in which the lid body 10 is internally fitted into the container body 20. In Fig. 5, the container body 20 is illustrated in a state in which a part of the flange portion 25 and a part of the main body outer edge portion 26 have been removed in order to clearly show the structure of the gripping piece accommodating portion 29.

As shown in Figures 3 and 4, the container body 20 includes a storage mounting portion 21, a storage peripheral wall portion 23, an upper peripheral wall portion 24, a flange portion 25, a body outer edge portion 26, a lid locking portion 27, an inner peripheral step portion 28, and a gripping piece storage portion 29.

In this embodiment, the container body 20 has an octagonal outer shape in a plan view. Here, "octagonal shape" means a shape that can be regarded as an octagon when the container body 20 is viewed as a whole, that is, a substantially octagonal shape. Therefore, for example, a protruding portion may be formed on part of the periphery of the container body 20, or at least one corner may be formed as a polygon rather than a right angle, or may be formed in a curved shape. Also, part of the periphery of the container body 20 may be formed in a curved shape. This also applies to the shapes of each part (described below) that constitutes the packaging container 1 when viewed from every direction.

The external shape of the container body 20 in a plan view is not limited to an octagonal shape, but may be a polygonal shape such as a square, rectangle, triangle, or pentagon, or may be a shape without clear corners, such as a circle.

The storage and placement section 21 constitutes a surface on which the contents contained in the packaging container 1 are placed. The storage and placement section 21 has a circular outer shape in a plan view. The outer shape of the storage and placement section 21 in a plan view is not limited to a circular shape, and may be a polygonal shape.

A first mark 211 is formed on the storage and placement section 21. The first mark 211 is an indicator that serves as a reference when arranging the stored items. In this embodiment, two first marks 211 are formed on the storage and placement section 21 at positions facing each of the two opposing second marks 255.

The second mark 255 is an index for positioning the lid body 10 relative to the container body 20 when the lid body 10 is fitted inside the container body 20. Furthermore, when the lid body 10 is fitted inside the container body 20, the label attachment portion 17 (see FIG. 6) of the lid body 10 is located in a position facing the second mark 255. Therefore, by piling the contents in consideration of the position of the first mark 211, the contents can be piling in consideration of the position of the label attachment portion 17 when the lid body 10 is fitted inside the container body 20.

The storage peripheral wall portion 23 is formed on the periphery of the storage mounting portion 21 and forms the lower portion of the side wall of the container body 20. In this embodiment, the storage peripheral wall portion 23 is inclined upward from the periphery of the storage mounting portion 21 toward the outside. The storage peripheral wall portion 23 may not be inclined upward, but may be formed approximately perpendicular to the storage mounting portion 21 from the periphery of the storage mounting portion 21. "Approximately perpendicular" is a concept that includes vertical and an angle that can be regarded as vertical.

In this embodiment, the storage placement section 21 and the storage peripheral wall section 23 form a single space for storing non-stored items, but this is not limited thereto, and multiple storage placement sections 21 may be formed by at least one wall section.

As shown in FIG. 4, the upper peripheral wall portion 24 is formed above the storage peripheral wall portion 23 and forms the upper portion of the side wall of the container body 20. The upper peripheral wall portion 24 is a portion that protrudes upward from the outer end of the inner peripheral step portion 28 that is continuous with the upper end portion of the storage peripheral wall portion 23. In other words, the upper peripheral wall portion 24 is located outboard of the upper end portion of the storage peripheral wall portion 23 by the width of the inner peripheral step portion 28 in the horizontal direction. In this embodiment, the upper peripheral wall portion 24 is formed from the outer end portion of the inner peripheral step portion 28 approximately perpendicular to the inner peripheral step portion 28.

The flange portion 25 is the upper surface portion of the container body 20 that is connected to the upper end portion of the upper peripheral wall portion 24. The outer shape of the container body 20 in a plan view is determined by the flange portion 25. In this embodiment, as shown in FIG. 3, the flange portion 25 has an arc-shaped flange portion 251 that has an arc-shaped shape in a plan view, and a linear flange portion 252 that has a linear shape in a plan view.

The entire flange portion 25 is formed by alternating between the arc-shaped flange portions 251 and the linear flange portions 252. In this embodiment, the four arc-shaped flange portions 251 and the four linear flange portions 252 are alternately connected, so that the shape of the flange portion 25 in a plan view (i.e., the outer shape of the container body 20) is octagonal. The number and arrangement of the arc-shaped flange portions 251 and the linear flange portions 252 can be determined arbitrarily, and the outer shape of the container body 20 in a plan view is determined by the number and arrangement.

In this embodiment, the first length L1 of the arc-shaped flange portion 251 (the length of the line segment connecting both ends of the arc-shaped flange portion 251) is longer than the second length L2 of the straight flange portion 252 (L1>L2). The first length L1 may be more than twice the length of the second length L2 (L1>L2x2). However, the relationship between the first length L1 and the second length L2 is not limited to this, and the second length L2 may be longer than the first length L1 (L2>L1), or the first length L1 and the second length L2 may be equal (L1=L2).

The flange portion 25 is formed with a second mark 255. As described below, the lid body 10 is formed with a lid body side mark 16 (see FIG. 6). The lid body side mark 16 is an index for positioning the lid body 10 with respect to the container body 20 when the lid body 10 is fitted inside the container body 20. By positioning the lid body 10 with respect to the container body 20 so that the lid body side mark 16 faces the second mark 255, the lid body 10 can be fitted inside the container body 20 so that the lid body gripping piece 14 (see reference numeral 1012 in FIG. 5) is accommodated in the gripping piece accommodation portion 29.

The second mark 255 may be formed on the flange portion 25 so that the lid gripping piece 14 is accommodated in the gripping piece housing portion 29 when the lid body 10 is internally fitted into the container body 20. In this embodiment, the second mark 255 is formed on the flange portion 25 so that the lid gripping piece 14 is accommodated in one of the four gripping piece housing portions 29 when the lid body 10 is internally fitted into the container body 20.

As shown in FIG. 4, the storage and placement portion 21, the storage peripheral wall portion 23, and the flange portion 25 have an uneven shape. This allows the necessary strength to be secured even if the sheet thickness is relatively thin (for example, 0.5 mm or less as described above). However, as long as the necessary strength can be secured, the storage and placement portion 21, the storage peripheral wall portion 23, and the flange portion 25 do not need to have an uneven shape, and may have a flat shape. A "flat surface" may be a surface that can be regarded as a flat surface, and may include some unevenness. For example, when the flange portion 25 has a flat shape, the flange portion 25 may be a plane extending along an approximately horizontal plane. The "approximately horizontal plane" is a concept that includes a horizontal plane and a surface that can be regarded as a horizontal plane. However, the flange portion 25 may be an inclined surface that is inclined from an approximately horizontal plane.

The body outer edge 26 is the outer edge (outer wall) of the container body 20 that is connected to the outer peripheral end of the flange portion 25.

The lid locking portion 27 is located inside the flange portion 25 and is a portion that can lock the lid outer edge portion 13 (see FIG. 6) from above. The lid locking portion 27 is a portion that protrudes inward from the upper peripheral wall portion 24. Also, as shown by reference numeral 1011 in FIG. 4 and FIG. 5, the lid locking portion 27 is formed in the upper peripheral wall portion 24 at a position spaced apart from the inner peripheral step portion 28 that is connected to the lower end portion of the upper peripheral wall portion 24.

In this embodiment, as shown in FIG. 3, two lid locking portions 27 are formed on each of the eight corners of the upper peripheral wall portion 24. That is, two lid locking portions 27 are formed on each of the eight connection positions between the arc-shaped flange portion 251 and the linear flange portion 252. The lid locking portions 27 only need to be formed at positions spaced apart from the inner peripheral step portion 28, and for example, the number of lid locking portions 27 and the positions of the lid locking portions 27 when the container body 20 is viewed in plan can be determined arbitrarily. The positions and number of the lid locking portions 27 may be determined taking into consideration the ease of fitting the lid body 10 into the container body 20, etc.

The inner peripheral step 28 is located inside the flange portion 25, as shown in Figs. 3 and 4. The inner peripheral step 28 is located below the lid locking portion 27, as shown by reference numeral 1011 in Figs. 4 and 5. The inner peripheral step 28 is a portion that can support the lid outer edge portion 13 from below. Reference numeral 1012 in Fig. 5 shows the state in which the inner peripheral step 28 supports the lid outer edge portion 13 (specifically, the lid bottom portion 131).

The inner peripheral step 28 is a flat portion whose inner end is connected to the upper end of the storage peripheral wall 23 and whose outer end is connected to the lower end of the upper peripheral wall 24. The inner peripheral step 28 is a flat surface extending along a substantially horizontal plane. In this case, the inner peripheral step 28 can stably support the lid outer edge 13. However, the inner peripheral step 28 may be an inclined surface inclined from a substantially horizontal plane. As described above, the inner peripheral step 28 is formed below the lid locking portion 27 and at a position spaced apart from the lid locking portion 27 (see reference numeral 1011 in FIG. 4 and FIG. 5).

As shown by reference numeral 1012 in FIG. 5, the gripping piece accommodating section 29 is a section that accommodates the lid gripping piece 14 while inclining it upwards toward the outside. Also, as shown by reference numeral 1012 in FIG. 5, the gripping piece accommodating section 29 has a shape with a bottom surface that is recessed downward. The gripping piece accommodating section 29 is formed in a position that faces the lid gripping piece 14 when the lid 10 is internally fitted and accommodated in the container body 20. In other words, the gripping piece accommodating section 29 and the lid gripping piece 14 are formed in the container body 20 and the lid 10, respectively, so as to face each other when the lid 10 is internally fitted in the container body 20.

The container body 20 may have a plurality of gripping piece accommodating sections 29. In this embodiment, the gripping piece accommodating sections 29 are formed at every other one of the plurality of connection positions between the arc-shaped flange section 251 and the linear flange section 252. However, the gripping piece accommodating sections 29 do not necessarily have to be formed in this manner, and the gripping piece accommodating sections 29 may be formed at a position that can accommodate the lid body gripping piece 14 when the lid body 10 is fitted inside the container body 20. For example, the gripping piece accommodating sections 29 may be formed at at least two of the plurality of connection positions between the arc-shaped flange section 251 and the linear flange section 252. In addition, the gripping piece accommodating sections 29 may not be formed at the connection positions between the arc-shaped flange section 251 and the linear flange section 252. For example, the gripping piece accommodating sections 29 may be formed on a part of the arc-shaped flange section 251 or a part of the linear flange section 252.

The gripping piece accommodating portion 29 is a cutout portion formed in a portion of the upper peripheral wall portion 24 and the flange portion 25. The gripping piece accommodating portion 29 has an inclined surface 291 (corresponding to the bottom surface) that slopes upward toward the outside and is recessed downward, and an accommodating side wall 292 formed on both ends along the inclination direction of the inclined surface 291. The inclination angle and size of the inclined surface 291 may be determined taking into consideration the size of the lid gripping piece 14. The inclined surface 291 allows the lid gripping piece 14 to be inclined upward.

In this embodiment, the top 293 of the gripping piece housing 29 (the outer end of the inclined surface 291) is part of the flange portion 25. Specifically, the top 293 of the gripping piece housing 29 is the inner end of the flange portion 25.

[Cover body]
Fig. 6 is a plan view of the lid 10. Reference numerals 1021 and 1022 in Fig. 7 are side views of the lid 10. Reference numeral 1023 in Fig. 7 is an enlarged side view of the lid gripping piece 14.

As shown in Figures 6 and 7, the lid body 10 includes a top plate portion 11, a lid body side wall portion 12, a lid body outer edge portion 13, and a lid body gripping piece 14. The lid body 10 has an octagonal outer shape in a plan view. In this way, it is preferable that the lid body 10 has a shape that has an outer shape similar to the outer shape of the container body 20 in a plan view.

The top plate portion 11 is a plate-like member that is formed of one surface and has a shape that follows the outer shape of the lid body 10 in a planar view. In this way, the shape of the top plate portion 11 follows the outer shapes of the lid body 10 and the container body 20 in a planar view, so that when the top plate portion 11 is made of a transparent material, the contents contained therein can be clearly and easily seen from above the packaging container 1 through the top plate portion 11. In this embodiment, as shown in FIG. 6, the outer shape of the top plate portion 11 in a planar view is circular, but is not limited to this and may be, for example, octagonal.

The number of surfaces constituting the top plate portion 11 is not particularly limited, but it is preferable that there is only one. This ensures good visibility of the contents and makes it easy to place the container body 20 on the top plate portion 11 when stacking the packaging containers 1. The top plate portion 11 may be made up of multiple surfaces.

The lid side wall 12 is a member that is connected to the periphery of the top plate 11 and extends toward the lid outer edge 13 located below the outer end of the top plate 11. The lid side wall 12 is inclined outward from the top plate 11 toward the lid outer edge 13. Therefore, the area of the opening of the lid 10 formed inside the lid outer edge 13 is larger than the area of the top plate 11. However, the lid side wall 12 may not be inclined and may extend approximately vertically from the top plate 11.

The lid outer edge 13 is the outer edge of the lid 10, which is connected to the lower end of the lid side wall 12. The lid outer edge 13 is formed in a position on the lid 10 that is paired with the position where the inner peripheral step 28 and the upper peripheral wall 24 are formed in the container body 20. Therefore, in this embodiment, the lid outer edge 13 has an arc-shaped outer edge 136 that has an arc-shaped shape in a plan view, and a linear outer edge 137 that has a linear shape in a plan view. The arc-shaped outer edge 136 corresponds to the arc-shaped flange 251 of the container body 20 when the lid 10 is fitted inside the container body 20. The linear outer edge 137 corresponds to the linear flange 252 of the container body 20 when the lid 10 is fitted inside the container body 20.

The lid outer edge portion 13 includes a lid bottom portion 131, a lid peripheral wall portion 132, a lid eaves portion 133, and a convex portion 134.

The lid bottom 131 is a frame-shaped portion that constitutes the bottom of the lid 10. The lid bottom 131 is a surface that can come into contact with the inner peripheral step 28 when the lid 10 is fitted inside the container body 20. The lid bottom 131 is a flat surface that extends along a substantially horizontal plane. In this case, the inner peripheral step 28 can stably support the lid outer edge 13. However, the lid bottom 131 may also be an inclined surface that is inclined from a substantially horizontal plane.

The lid peripheral wall portion 132 is a portion that extends upward from the outer end of the lid bottom portion 131. As shown by reference numerals 1021 and 1022 in FIG. 7, the lid peripheral wall portion 132 extends outward from the outer end of the lid bottom portion 131. However, the lid peripheral wall portion 132 may extend approximately perpendicular to the lid bottom portion 131.

The lid overhanging portion 133 is a plane extending from the outer end of the lid peripheral wall portion 132 along a substantially horizontal plane. The outer end of the lid overhanging portion 133 is a portion that can abut against the upper peripheral wall portion 24 when the lid 10 is fitted inside the container body 20. When the lid 10 is fitted inside the container body 20, the entire outer end of the lid overhanging portion 133 may abut against the upper peripheral wall portion 24, or only a portion of the outer end may abut.

The lid 10 and the container body 20 are designed so that the size of the lid outer edge 13 in a plan view is approximately the same as the size of the upper peripheral wall 24 in a plan view. "Approximately the same" is a concept that includes both "same" and differences that can be considered to be the same. In other words, the lid 10 and the container body 20 are designed so that the outer end of the lid overhang 133 and the upper peripheral wall 24 are in point contact on a cut surface parallel to a substantially vertical plane of the packaging container 1. In addition, the vertical length of the lid peripheral wall 132 is shorter than the length between the lid locking portion 27 and the inner peripheral step 28 of the container body 20.

Furthermore, when the lid body 10 moves upward, the upper surface of the lid body overhanging portion 133 comes into contact with the lid locking portion 27. Therefore, unless a force is applied to the lid body 10 that causes it to move from below the lid locking portion 27 to above, the upward movement of the lid body 10 is restricted by the lid locking portion 27. When the lid body 10 moves downward, the lid body bottom portion 131 comes into contact with the inner peripheral step portion 28. Therefore, the downward movement of the lid body 10 is restricted by the inner peripheral step portion 28.

Therefore, when an external force acts on the lid body 10 or when the internal pressure of the packaging container 1 rises, the lid body 10 fits inside the container body 20 in a state in which vertical movement is permitted between the lid locking portion 27 and the inner peripheral step portion 28. In other words, the lid body 10 fits inside the container body 20 in a state in which it can be lifted from the inner peripheral step portion 28.

As shown in FIG. 7, the convex portion 134 is a portion of the lid outer edge 13 that protrudes toward the top plate 11. When viewed from the lid bottom 131 side, the convex portion 134 can also be said to be a portion of the lid outer edge 13 that is recessed from the lid bottom 131. As shown in FIG. 7, the shape of the convex portion 134 may be an arc (arch-like) or a polygonal shape such as a rectangle in a cross section perpendicular to the extension direction of the convex portion 134 (the direction from the inside to the outside of the lid 10).

When the lid 10 is fitted inside the container body 20, the convex portion 134 is formed in a plan view as part of the lid outer edge 13 and at a position facing the gripping piece housing 29 of the container body 20. In this embodiment, as shown in FIG. 6, four convex portions 134 are formed so as to face all four gripping piece housings 29. Specifically, the convex portions 134 are formed at the position connected to the base end 141 of the lid gripping piece 14 on the lid outer edge 13 and at all positions other than the position connected to the base end 141 and facing the gripping piece housing 29 on the lid outer edge 13. In other words, the convex portions 134 are formed at every other one of the multiple connection positions between the arc-shaped outer edge 136 and the linear outer edge 137.

As described below, by forming the convex portion 134 at the above-mentioned opposing position, when the convex portion 134 is separated from the inner peripheral step portion 28, the inside of the packaging container 1 in a state where the lid body 10 is internally fitted into the container body 20 can be ventilated with the outside. In other words, the convex portion 134 can function as an air vent in the packaging container 1 in a state where the lid body 10 is internally fitted into the container body 20.

By forming the convex portion 134 at a position connected to the base end 141 of the lid gripping piece 14, the inside of the packaging container 1 can be ventilated in the gripping piece housing section 29 in which the lid gripping piece 14 is housed. In addition, by forming the convex portion 134 at a position other than the position connected to the base end 141, the inside of the packaging container 1 can be ventilated even in the gripping piece housing section 29 in which the lid gripping piece 14 is not housed. In this way, by forming the convex portions 134 at multiple positions on the lid outer edge portion 13, the ventilation performance can be improved.

Furthermore, since the convex portion 134 is formed at a position connected to the base end 141 of the lid gripping piece 14, the strength of the position connected to the base end 141 on the lid outer edge 13 can be increased. When an action occurs on the lid gripping piece 14, the packaging container 1 is likely to receive the force caused by the action at the position connected to the base end 141 on the lid outer edge 13. Therefore, by increasing the strength of the position connected to the base end 141 on the lid outer edge 13, the durability of the lid 10 against the action on the lid gripping piece 14 can be improved. The action on the lid gripping piece 14 is, for example, caused by a hand or an object colliding with the lid gripping piece 14, and by the user picking up the lid gripping piece 14 when removing the lid 10 from the container body 20.

However, from the viewpoint of ventilating the inside of the packaging container 1, it is sufficient that the convex portion 134 is formed at the above-mentioned opposing position. Therefore, as in this embodiment, it is not necessary to form the convex portion 134 at opposing positions that face all of the tab storage portions 29, but it is sufficient that the convex portion 134 is formed at at least one of the opposing positions.

For example, the convex portion 134 may be formed only at a position on the lid outer edge 13 that is connected to the base end 141 of the lid gripping piece 14. Also, the convex portion 134 may be formed on the lid outer edge 13 at a position connected to the base end 141 and at a position opposite one of the gripping piece housings 29 that is different from the position connected to the base end 141. Furthermore, the convex portion 134 may not be formed at a position connected to the base end 141 on the lid outer edge 13, but only at a position opposite at least one of the gripping piece housings 29.

The lid gripping piece 14 is a part that protrudes from a part of the lid outer edge 13. The lid gripping piece 14 is a part that is gripped by a user who is removing the lid 10 from the container body 20. The lid gripping piece 14 is designed, for example, taking into consideration the ease of gripping the lid gripping piece 14 and the likelihood of a hand or object colliding with the lid gripping piece 14.

The lid gripping piece 14 is formed in the lid 10 at a position that pairs with the position where the gripping piece housing portion 29 is formed. In this embodiment, one lid gripping piece 14 is formed at a position that will be housed in one of the multiple gripping piece housing portions 29 when the lid 10 is internally fitted into the container body 20.

Now consider the case where only one gripping piece housing 29 is formed on the container body 20, and the lid body 10 is removed from the container body 20 by rotating around an axis passing through the center of the lid body 10. In this case, in order to refit the lid body 10 into the container body 20, one lid body gripping piece 14 will be housed in one gripping piece housing 29, but in some cases, it may be necessary to rotate the lid body 10 once to house the lid body gripping piece 14 in the gripping piece housing 29.

In this embodiment, as described above, in the container body 20, the gripping piece accommodating portion 29 is formed at multiple positions on the body outer edge portion 26. In this embodiment, it is formed at multiple connection positions between the arc-shaped flange portion 251 and the linear flange portion 252. Therefore, even if the lid body gripping piece 14 comes off from the gripping piece accommodating portion 29 due to the above-mentioned rotation, the lid body 10 can be rotated as it is to accommodate the lid body gripping piece 14 in a gripping piece accommodating portion 29 different from the gripping piece accommodating portion 29 in which the lid body gripping piece 14 was accommodated. The gripping piece accommodating portion 29 different from the gripping piece accommodating portion 29 in which the lid body gripping piece 14 was accommodated may be, for example, a gripping piece accommodating portion 29 adjacent to the gripping piece accommodating portion 29 in which the lid body gripping piece 14 was accommodated. Therefore, even if only one lid gripping piece 14 is formed, the lid gripping piece 14 can be easily accommodated in the gripping piece accommodating portion 29 and the lid 10 can be fitted inside the container body 20 without rotating the lid 10 one full turn.

In addition, because the gripping piece housing 29 is formed at multiple connection positions, no matter how misaligned the lid gripping piece 14 and the gripping piece housing 29 are, the lid gripping piece 14 can be housed in the gripping piece housing 29 by finely adjusting the position of the lid 10 in the rotational direction. Therefore, the lid 10 can be easily fitted inside the container body 20.

However, if easy storage of the lid gripping piece 14 in the gripping piece storage section 29 as described above is not taken into consideration, only one gripping piece storage section 29 may be formed in the container body 20. Also, in this embodiment, only one lid gripping piece 14 is formed in the lid 10, but multiple lid gripping pieces 14 may be formed.

The lid 10 includes a lid side mark 16 and a label attachment section 17. As described above, the lid side mark 16 is an index for positioning the lid 10 relative to the container body 20. In this embodiment, the lid side mark 16 is formed at the position where the label attachment section 17 is formed on the lid 10, but is not limited thereto, and may be formed at a position where the lid gripping piece 14 is accommodated in the gripping piece accommodation section 29 when facing the second mark 255 on the container body 20. The label attachment section 17 is a section where a label bearing the name of the contained item or the product name is affixed.

[Change in position of lid body on container body]
8 is a diagram for explaining the change in the position of the lid body 10 when the lid body 10 is fitted inside the container body 20. Reference numeral 1031 in FIG. 8 is a cross-sectional view showing a state in which a part of the lid body outer edge portion 13 is not in contact with the inner peripheral step portion 28 (a part of the lid body outer edge portion 13 is floating from the inner peripheral step portion 28). Reference numeral 1032 in FIG. 8 is a cross-sectional view showing a state in which a part of the lid body outer edge portion 13 is in contact with the inner peripheral step portion 28 (a state in which the lid body outer edge portion 13 is not floating from the inner peripheral step portion 28). Specifically, reference numeral 1031 in FIG. 8 indicates a state in which a part of the lid body outer edge portion 13 on which the lid body gripping piece 14 is formed is not in contact with the inner peripheral step portion 28. Reference numeral 1032 in FIG. 8 indicates a state in which a part of the lid body outer edge portion 13 on which the lid body gripping piece 14 is formed is in contact with the inner peripheral step portion 28.

9 is an enlarged perspective view of the picking piece accommodating portion 29 and the convex portion 134 in the state shown by reference numeral 1031 in FIG. 8. Reference numeral 1042 in FIG. 9 is an enlarged perspective view of the picking piece accommodating portion 29 and the convex portion 134 in the state shown by reference numeral 1032 in FIG. 8. Specifically, FIG. 9 is an oblique view of the picking piece accommodating portion 29 and the convex portion 134 when viewed from above along the direction in which the inclined surface 291 of the picking piece accommodating portion 29 extends from the inside to the outside of the container body 20. Please note that reference numeral 1041 in FIG. 9 emphasizes the air passage 50 in order to clearly show that the air passage 50 is formed.

<Downward movement of the lid>
When a user attempts to fit the lid body 10 into the container body 20, the underside of the lid body bottom 131 abuts against the lid locking portion 27. When the lid body bottom 131 abuts against the lid locking portion 27, the lid body 10 is pushed into the container body 20, temporarily deforming the shape of the lid body 10. Therefore, the lid body outer edge portion 13 can move from the upper side to the lower side of the lid locking portion 27 while abutting against the lid locking portion 27. Therefore, the lid body 10 can be fitted into the container body 20.

At this time, a part of the lid body gripping piece 14 is accommodated in the gripping piece housing 29, and the other part of the lid body gripping piece 14 protrudes from the gripping piece housing 29 in consideration of ease of gripping. In FIG. 8, reference numeral 1031 shows the entire lid body gripping piece 14 separated from the gripping piece housing 29 in order to clearly show that an air passage 50, which will be described later, is formed. However, in reality, in the state of reference numeral 1031 in FIG. 8, it should be noted that a part of the lid body gripping piece 14 is accommodated in the gripping piece housing 29, the other part protrudes from the gripping piece housing 29, and the air passage 50 is formed. In this embodiment, the part of the lid body gripping piece 14 is the tongue of the lid body gripping piece 14 (the part on the base end 141 side other than the tip part), and the other part of the lid body gripping piece 14 is the tip part of the lid body gripping piece 14.

When the lid 10 is fitted inside the container body 20, a portion of the lid outer edge 13 in plan view is located between the lid locking portion 27 and the inner peripheral step 28, and is spaced apart from the inner peripheral step 28. In FIG. 8, reference numeral 1031 indicates that a portion of the lid bottom 131 in plan view is located a distance DS1 away from the inner peripheral step 28.

When the packaging container has a lid that fits inside the container body, the shape of the outer edge of the lid can be simplified compared to when the outer edge of the container body fits into the outer edge of the lid (when the lid fits externally onto the container body). Therefore, in the case of a packaging container with an internal fit, more can be manufactured per unit time than in the case of a packaging container with an external fit, so the packaging container 1 can be manufactured at low cost.

However, in the case of the internal fitting configuration, a lid gripping piece is formed on the packaging container to make it easier to remove the lid. Furthermore, there is a risk that the user's hand may come into contact with the portion of the lid gripping piece that protrudes from the packaging container (in the case of packaging container 1, the portion of lid gripping piece 14 that protrudes from gripping piece housing portion 29) even though the user does not intend to remove the lid from the container body. Furthermore, the protruding portion is easily touched by objects, etc. In this way, when a hand or an object, etc., comes into contact with the protruding portion, the protruding portion is subjected to an external force in the downward direction.

When the lid is fitted inside the container body so that it cannot move up and down relative to the container body (when the lid is fixed to the container body while fitted inside the container body), the lid may be deformed by the external force received by the protruding portion. This deformation of the lid may cause damage to the lid itself.

Furthermore, after the contents, such as food, are placed in the packaging container, the packaging container is wrapped in a wrapping material such as plastic wrap to prevent the contents from leaking out from the gap between the lid and the container body. The wrapping material wraps the packaging container to fit the shape of the packaging container. Alternatively, the lid and container body are fixed together with a fastener such as tape. If the lid is fixed to the container body while fitting inside the container body, there is a risk that deformation of the lid will damage the wrapping material or the fastener.

Furthermore, even if the user does not intend to remove the lid from the container body, there is a risk that the lid will come off from the container body if the user's hand or an object comes into contact with the protruding portion.

In addition, the more firmly the lid is closed so that it cannot move up or down relative to the container body, the more difficult it becomes to remove the lid from the container body. In other words, it becomes more difficult for the user to lift up the lid grip.

In the packaging container 1, the lid body 10 can move up and down relative to the container body 20 (the lid body 10 can float relative to the inner peripheral step 28), so the lid is not closed too tightly. Therefore, in the packaging container 1, as shown by reference numeral 1032 in FIG. 8, when the protruding portion of the lid body gripping piece 14 is subjected to an external force, a part of the lid body outer edge portion 13, which is a distance DS1 away from the inner peripheral step 28, can be moved toward the inner peripheral step 28. In other words, the lid body 10 can be sunk while maintaining a state in which the lid body 10 is internally fitted into the container body 20. This movement (sinking) absorbs the external force acting on the protruding portion, so the degree of deformation of the lid body 10 due to the external force can be reduced.

Therefore, in an internally fitted packaging container 1 that can be manufactured inexpensively, by protruding a portion of the lid gripping piece 14, it is possible to reduce the possibility of damage to the packaged item, fixed item, or packaging container 1 while maintaining the ease of gripping the lid gripping piece 14. In other words, in an internally fitted packaging container 1, it is possible to reduce the possibility of damage to the packaged item, fixed item, or packaging container 1 while maintaining the ease of removal of the lid 10. In addition, when the protruding portion is subjected to an external force, it is possible to move a portion of the lid outer edge 13 toward the inner peripheral step 28, thereby reducing the possibility of the lid 10 being inadvertently removed from the container body 20.

In this way, the packaging container 1 can reduce the possibility of the above-mentioned damage occurring, and therefore the amount of packaging container 1 that is discarded due to the above-mentioned damage can be reduced. Furthermore, when an item is stored in the packaging container 1, the amount of the item that is discarded due to the above-mentioned damage or the amount of the item that is discarded due to the careless removal of the lid 10 can be reduced. This can contribute to the achievement of Goal 12 "Responsible Consumption and Production" and Goal 14 "Conserve and sustainably use the oceans and seas" of the Sustainable Development Goals (SDGs).

Furthermore, by forming the lid locking portion 27 and the inner peripheral step portion 28 at a distance from each other, when the lid 10 is fitted inside the container body 20, a part of the lid outer edge portion 13 in a plan view can be moved vertically between the lid locking portion 27 and the inner peripheral step portion 28. This makes it possible to increase the capacity of the packaging container 1 and reduce the possibility that the contents contained in the packaging container 1 will adhere to the lid 10 and spoil the aesthetic appearance of the packaging container 1.

When an external force is applied to the protruding portion of the lid gripping piece 14 in the state of 1031 in FIG. 8, the protruding portion of the lid gripping piece 14 moves toward the gripping piece housing 29. At this time, a portion of the lid outer edge 13 that is spaced apart from the inner peripheral step 28 moves downward and comes into contact with the inner peripheral step 28, as shown by 1032 in FIG. 8, and is supported by the inner peripheral step 28.

Therefore, a part of the lid outer edge 13 can move toward the inner peripheral step 28 (downward) until it is supported by the inner peripheral step 28. Therefore, the external force applied to the protruding portion until the entire lid outer edge 13 is supported by the inner peripheral step 28 can be absorbed by the movement of the part of the lid outer edge 13 that is separated from the inner peripheral step 28 until it abuts against the inner peripheral step 28 (sinking of the lid 10). In addition, the inner peripheral step 28 restricts the part of the lid outer edge 13 from moving downward from the inner peripheral step 28. Therefore, the downward movement of the part of the lid outer edge 13 can reduce the possibility that the contents contained in the packaging container 1 will adhere to the lid 10.

When a portion of the lid outer edge 13 in plan view is separated from the inner peripheral step 28, another portion of the lid outer edge 13 may be in contact with the inner peripheral step 28. On the other hand, the entire lid outer edge 13 in plan view may be separated from the inner peripheral step 28. The portion of the lid outer edge 13 that is separated from the inner peripheral step 28 may be at least a portion of the lid outer edge 13 in plan view.

Furthermore, when the lid body 10 is fitted inside the container body 20, at least a portion of the lid body overhanging portion 133 in a plan view may be engaged with the lid locking portion 27. By engaging the lid body overhanging portion 133 with the lid locking portion 27, the lid body 10 can be maintained in a state of being fitted inside the container body 20 until a force capable of removing the lid body 10 is applied to the lid body 10.

In this embodiment, the protruding portion of the lid body gripping piece 14 is the tip portion of the lid body gripping piece 14. The smaller the protruding portion, the smaller the portion of the lid body gripping piece 14 on which external forces act. When the protruding portion is the tip portion, the occurrence of damage to the packaged item, fixed object, or packaging container 1, and the occurrence of inadvertent removal of the lid body 10 can be further reduced compared to when the tongue of the lid body gripping piece 14 protrudes from the gripping piece housing portion 29 in addition to the tip portion.

In addition, when the lid bottom 131 is in contact with the inner peripheral step 28, the entire lid gripping piece 14 may be accommodated in the gripping piece housing 29. That is, the vertical movement distance of the lid outer edge 13 may be specified so that the entire lid gripping piece 14 can be accommodated in the gripping piece housing 29. In this case, the external force acting on the lid gripping piece 14 until the entire lid gripping piece 14 is accommodated in the gripping piece housing 29 can be absorbed by the downward movement of the lid outer edge 13. However, the entire lid gripping piece 14 does not have to be accommodated in the gripping piece housing 29. It is sufficient that a part of the lid gripping piece 14 can move toward the gripping piece housing 29 when the lid gripping piece 14 is subjected to an external force.

When the lid body 10 is removed from the container body 20, the lid body 10 is lifted upward from a state in which the upper surface of the lid body overhanging portion 133 is engaged (contacted) with the lid engagement portion 27, temporarily deforming the shape of the lid body 10. Therefore, the lid body outer edge portion 13 can move from the lower side to the upper side of the lid engagement portion 27 while contacting the lid engagement portion 27. Therefore, the lid body 10 can be removed from the container body 20.

<Upward movement of the lid>
As described above, the lid body 10 can move in the vertical direction when fitted inside the container body 20. That is, the lid body 10 is not fitted inside the container body 20 too firmly, but abuts against the container body 20 to an extent that allows the lid body 10 to move in the vertical direction (to an extent that the lid body 10 can float). Therefore, there may be a portion where a slight gap is generated between the lid body 10 and the container body 20. For example, when the contents are heated in a microwave oven or the like, the internal pressure of the packaging container 1 increases due to steam generated by heating the contents. Even if the gas expands with the increase in internal pressure, the gas (e.g., steam) can be released from the above-mentioned gap.

Also, consider the case where a part of the lid outer edge 13 is separated from the lid locking portion 27 (for example, a part of the lid outer edge 13 is in contact with the inner peripheral step 28 as shown by reference numeral 1032 in FIG. 8). In this case, the lid 10 is pushed up toward the lid locking portion 27 by the force of the gas that expands with the increase in internal pressure of the packaging container 1. This may result in a slight gap between the lid 10 and the container body 20. Therefore, the gas that expands with the increase in internal pressure can be released from this gap as well.

Furthermore, consider the case where the internal pressure of the packaging container 1 rises when the position (the opposing position described above) where the convex portion 134 on the lid outer edge portion 13 is formed is in contact with the inner peripheral step portion 28, as in the state indicated by reference numeral 1032 in FIG. 8. In this case as well, the force of the gas that expands with the rise in internal pressure pushes the convex portion 134 up toward the lid locking portion 27. As a result, as indicated by reference numeral 1031 in FIG. 8 and reference numeral 1041 in FIG. 9, an air passage 50 is formed by the convex portion 134 and the inclined surface 291 of the tab accommodating portion 29.

When the opposing position is in contact with the inner peripheral step 28, as shown by reference numeral 1042 in FIG. 9, the ventilation passage 50 is not formed, or even if the ventilation passage 50 is formed, it is only a small ventilation passage 50. Therefore, even if the gas expanded with the increase in internal pressure is released from the small gap as described above, the internal pressure may further increase. Even if the internal pressure further increases, as described above, the convex portion 134 moves toward the lid locking portion 27, and the ventilation passage 50 is formed as shown by reference numeral 1031 in FIG. 8 and reference numeral 1041 in FIG. 9. Therefore, the inside of the packaging container 1 can be ventilated with the outside. Therefore, the gas expanded with the increase in internal pressure can be released through the ventilation passage 50. Therefore, the possibility of the internal pressure increasing can be reduced.

Even if the opposing position does not abut against the inner peripheral step 28, as long as the convex portion 134 is spaced apart from the lid locking portion 27, when the internal pressure rises, the convex portion 134 moves toward the lid locking portion 27, forming the ventilation passage 50. The ventilation passage 50 does not have to be formed only when the opposing position abuts against the lid locking portion 27, but may be formed during the process of the convex portion 134 moving toward the lid locking portion 27. In other words, it is sufficient that the ventilation passage 50 is formed when the lid body 10 is fitted inside the container body 20 and the convex portion 134 is spaced apart from the inner peripheral step 28.

As described above, if at least a portion of the lid outer edge 13 is separated from the inner peripheral step 28 in a plan view, the action received by the lid gripping piece 14 can be absorbed. If at least a portion of the lid outer edge 13 is in the above-mentioned opposing position, an air passage 50 is formed by the convex portion 134 and the inclined surface 291 of the gripping piece housing portion 29, which can reduce the possibility of an increase in internal pressure.

<Summary>
In this manner, in the packaging container 1, when the lid 10 is fitted inside the container body 20, at least a portion of the lid outer edge 13 is located between the lid locking portion 27 and the inner peripheral step 28, and is spaced apart from the inner peripheral step 28. This makes it possible to absorb the action of an external force on the lid gripping piece 14, thereby reducing the possibility of various malfunctions caused by the external force occurring.

In addition, in the packaging container 1, the inclined surface 291 of the picking piece housing 29 is recessed downward, and a convex portion 134 is formed at a position facing the picking piece housing 29 on the lid outer edge portion 13 in a plan view. When this facing position is separated from the inner peripheral step portion 28, an air passage 50 is formed by the convex portion 134 and the inclined surface 291. This reduces the possibility of the internal pressure of the packaging container 1 increasing.

In other words, the packaging container 1 has a lid locking portion 27 and an inner peripheral step portion 28 that are spaced apart from each other, and the lid outer edge portion 13 is positioned between them so that it can move up and down, and has the above-mentioned inclined surface 291 and convex portion 134. As a result, the packaging container 1 can solve two problems: the occurrence of various malfunctions caused by the above-mentioned external force, and the increase in internal pressure.

[Additional Notes]
The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

REFERENCE SIGNS LIST 1 Packaging container 10 Lid 11 Top plate portion 13 Lid outer edge portion 134 Convex portion 14 Lid gripping piece 141 Base end portion 20 Container body 25 Flange portion 251 Arc-shaped flange portion 252 Linear flange portion 27 Lid locking portion 28 Inner peripheral step portion 29 Grip receiving portion 291 Inclined surface (bottom surface)
50 Ventilation passage

Claims (7)

A packaging container comprising a container body and a lid body for closing the container body,
The lid body is
A lid outer edge portion which is an outer edge portion of the lid;
A lid gripping piece protruding from a part of the lid outer edge portion,
The container body includes:
a lid locking portion that is located inside the flange portion of the container body and that can lock the outer edge portion of the lid from above;
an inner peripheral step portion that is located inside the flange portion and below the lid locking portion and is capable of supporting the lid outer edge portion from below;
a tab receiving portion that receives the lid tab while inclining it upward toward the outside and has a bottom surface that is recessed downward;
the outer edge of the lid has a convex portion that protrudes toward the top plate of the lid at a position opposite to the tab accommodating portion when the lid is closed on the container body,
When the lid is closed on the container body, at least a part of the outer edge of the lid is located between the lid locking portion and the inner peripheral step portion and is spaced apart from at least the inner peripheral step portion,
A packaging container, wherein an air passage is formed by the convex portion and a bottom surface of the tab accommodating portion when the convex portion is spaced apart from the inner peripheral step portion. The packaging container according to claim 1, wherein the convex portion is positioned between the lid locking portion and the inner peripheral step portion, and the air passage is formed by moving from a state separated from the lid locking portion toward the lid locking portion. The packaging container according to claim 1 or 2, wherein the outer edge of the lid has the convex portion at the opposing position, which is a position connected to the base end of the lid gripping piece. The container body has a plurality of the tab accommodating portions,
The packaging container according to claim 3, wherein the outer edge of the lid body has the convex portion at a position other than the position connected to the base end portion as the opposing position and also at a position opposing at least one of the tab accommodating portions. The container body has a plurality of the tab accommodating portions,
3. The packaging container according to claim 1, wherein the outer edge of the lid has the convex portion at a position other than the position connected to the base end of the lid tab, as the opposing position, and at a position opposing at least one of the tab accommodating portions. The packaging container according to claim 1 or 2, wherein at least a portion of the outer edge of the lid body that is spaced apart from the inner peripheral step portion moves downward and contacts the inner peripheral step portion when an external force acts on a protruding portion of the lid body picking piece that protrudes from the picking piece housing portion and the protruding portion moves toward the picking piece housing portion, thereby being supported by the inner peripheral step portion. The lid body has one lid body gripping piece,
The container body has an arc-shaped flange portion and a linear flange portion,
3. The packaging container according to claim 1, wherein the tab accommodating portions are formed at at least two of a plurality of connecting positions between the arcuate flange portion and the linear flange portion.

Images