Packaging containers

Abstract

To provide a lid body that is difficult to detach and can be fitted with light force, and a packaging container.SOLUTION: A lid body 100 of a packaging container 300 comprises a top surface 110 and a lid body side fitting portion 150 that can be fitted to a container side fitting portion 250 of the container body 200 outside the top surface 110. The lid body side fitting portion 150 comprises a lid body side engaging portion 153 that can engage with a part of the container side fitting portion 250 of the container body 200, and a lid body side inclined surface 170 that is inclined relatively greater toward a vertical axis Y with respect to the top surface 110 than a horizontal axis X with respect to the top surface 110 is provided at a lower end side of the lid body side engaging portion 153.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a lid for a packaging container, and a packaging container including the lid and a container body.

Background Art

[0002] Conventionally, packaging containers consisting of a container body for storing food such as prepared dishes and rice, and a lid that can be fitted to the container body, have been used in supermarkets, convenience stores and the like.

[0003] For example, the packaging container disclosed in Patent Document 1 is a packaging container including a container body and a lid, and by placing the lid over the container body and pushing it down toward the container body, the lid-side fitting portion of the lid fits into the container-side fitting portion of the container body. In addition, to prevent the inadvertent disengagement of the fit between the lid and the container body, the lid-side fitting portion is provided with a so-called undercut, which is a lid-side engaging portion capable of engaging with a part of the container-side fitting portion of the container body. However, since the lid is fitted to the container body by causing the lid-side engaging portion to climb over a part of the container-side fitting portion, it has been necessary to press the lid downward with a certain amount of force.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of Invention

Problems to be Solved by the Invention

[0005] In view of the above problems, the present invention provides a lid that is less likely to come off and can be fitted with a light force, and a packaging container.

Means for Solving the Problems

[0006] To solve the above problems, the lid of a packaging container according to the present invention is a lid of a packaging container comprising a top surface and a lid-side fitting portion on the outside of the top surface that can be fitted into a container-side fitting portion of the container body, wherein the lid-side fitting portion is provided with a lid-side engaging portion that can engage with a part of the container-side fitting portion of the container body, and the lower end of the lid-side engaging portion is provided with a lid-side inclined surface that is relatively more inclined toward the vertical axis with respect to the top surface than toward the horizontal axis with respect to the top surface.

[0007] According to the above features, the fitting between the lid-side fitting portion and the container-side fitting portion is difficult to disengage due to the lid-side engaging portion. On the other hand, when the lid is pressed downwards, the lid-side inclined surface, which is continuous with the lower end of the lid-side engaging portion, can slide along a part of the upper end of the container-side fitting portion. Thus, the lid-side inclined surface acts as a guide surface, making it easier to fit the lid-side fitting portion and the container-side fitting portion together. In particular, since the lid-side inclined surface is inclined more significantly towards the vertical axis than towards the horizontal axis with respect to the top surface, the lid-side inclined surface slides more easily downwards when it comes into contact with a part of the upper end of the container-side fitting portion. As a result, when the lid is pressed downwards, the lid-side inclined surface slides smoothly downwards along a part of the upper end of the container-side fitting portion, and the lid-side fitting portion and the container-side fitting portion on the upper end of the lid-side inclined surface easily fit together. Furthermore, because the sloping surface on the lid slides smoothly downwards, the lid can be fitted onto the container body with less force when pressing it downwards. This reduces the amount of force required to fit the lid onto the container body, improving work efficiency and reducing the burden on the worker.

[0008] Furthermore, the packaging container according to claim 1 of the present invention comprises a container body having a container-side fitting portion, a top surface, and on the outside of the top surface, the container-side fitting portion It is externally fitted and is provided continuously or intermittently around the entire circumference in the circumferential direction.A packaging container comprising a lid having a lid-side fitting portion, wherein the container-side fitting portion has a container-side engaging portion that can engage with a part of the lid-side fitting portion and a container-side inclined surface on the upper end side of the container-side engaging portion, the lid-side fitting portion has a lid-side engaging portion that can engage with a part of the container-side fitting portion and a lid-side inclined surface on the lower end side of the lid-side engaging portion, the lid-side inclined surface is inclined more significantly toward the vertical axis relative to the top surface than toward the horizontal axis relative to the top surface, and the lid rests on the container body. Furthermore, in the state before the lid-side fitting portion is fitted to the container-side fitting portion, the container-side inclined surface and the lid-side inclined surface have portions that abut each other and portions that do not abut each other, and the surface of the container-side inclined surface is configured to be uneven by providing a protrusion that fits within the container-side inclined surface and protrudes toward the lid-side engaging portion, or the surface of the lid-side inclined surface is configured to be uneven by providing a protrusion that fits within the lid-side inclined surface and protrudes toward the container-side fitting portion.

[0009] According to the above features, the lid-side inclined surface and the container-side inclined surface have areas that contact each other and areas that do not, so the contact area between the lid-side inclined surface and the container-side inclined surface is reduced, resulting in less frictional resistance. As a result, when the lid-side inclined surface comes into contact with the container-side inclined surface, it becomes easier for it to slide downwards. Consequently, when the lid is pressed downwards, the lid-side inclined surface slides more smoothly downwards on the container-side inclined surface, and the lid-side fitting portion and the container-side fitting portion at the upper end of the lid-side inclined surface engage more easily. Furthermore, because the lid-side inclined surface slides smoothly downwards, the lid can be fitted onto the container body even when the lid is pressed downwards with less force.

[0010] Furthermore, the packaging container according to the present invention is characterized in that the surface of the inclined surface on the container side or the inclined surface on the lid side is configured to be uneven.

[0011] According to the above features, the concave and / or convex shapes reduce the contact area between the lid-side inclined surface and the container-side inclined surface, thereby more effectively reducing frictional resistance. [Effects of the Invention]

[0012] The lid and packaging container of the present invention are difficult to detach and can be fitted with light force. [Brief explanation of the drawing]

[0013] [Figure 1] (a) is a plan view of the lid of the present invention, and (b) is a side view of the lid of the present invention. [Figure 2] (a) is the AA end view of Figure 1(a), (b) is a magnified side view of the area around the corner of the lid, and (c) is the BB end view of Figure 1(a) (or the CC end view of Figure 2(b)). [Figure 3] (a) is an enlarged end view of the area around the fitting portion on the lid side of Figure 2(a), and (b) is an enlarged end view of the area around the fitting portion on the lid side of Figure 2(c). [Figure 4] (a) is a plan view of the container body of the present invention, and (b) is a side view of the container body. [Figure 5] (a) is the DD end view of Figure 4(a), and (b) is the EE end view of Figure 4(a). [Figure 6] (a) is a plan view of the packaging container before the lid is fitted onto the container body, and (b) is a side view of the said packaging container. [Figure 7] (a) is the FF end view of Figure 6(a), and (b) is the GG end view of Figure 6(a). [Figure 8] (a) is an end view of the FF end view in Figure 6(a) with the lid fitted onto the container body, and (b) is an end view of the GG end view in Figure 6(a) with the lid fitted onto the container body. [Explanation of Symbols]

[0014] 100 Lid 110 Top surface 150 Lid side fitting part 153 Lid side engagement part 170 Slanted surface on the lid side 200 Container body 250 Container side fitting part 300 Packaging containers X horizontal axis Y vertical axis Modes for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, "upper" refers to the direction upward in the vertical direction when the packaging container is placed on a horizontal surface with the opening surface of the container body facing upward, and "lower" refers to the direction downward in the vertical direction. Further, the fitting between the lid body and the container body of the present invention means that, as described above, by placing the lid body over the container body and pushing it down toward the container body, the lid-side fitting portion of the lid body is fitted to the container-side fitting portion of the container body, and the lid-side fitting portion is provided with a lid-side engaging portion that can engage with a part of the container-side fitting portion of the container body, which is a so-called undercut.

[0016] First, Figs. 1, 2, and 3 show the lid body 100 of the present invention. Note that Fig. 1(a) is a plan view of the lid body 100, Fig. 1(b) is a side view of the lid body 100, Fig. 2(a) is an A-A end view of Fig. 1(a), Fig. 2(b) is an enlarged side view around the corner portion of the lid body 100, Fig. 2(c) is a B-B end view of Fig. 1(a) (or a C-C end view of Fig. 2(b)), Fig. 3(a) is an enlarged end view around the lid-side fitting portion 150 in Fig. 2(a), and Fig. 3(b) is an enlarged end view around the lid-side fitting portion 150 in Fig. 2(c).

[0017] As shown in Figures 1 and 2, the lid 100 has a deep dish shape with an opening at the bottom, and comprises a flat top surface 110 that is approximately rectangular in plan view, a side wall 120 that extends diagonally downward from the outer circumference 111 of the top surface 110, a flange portion 130 that extends outward from the side wall 120, a skirt portion 140 that extends downward from the flange portion 130, a lid-side fitting portion 150 provided on a part of the skirt portion 140, and a flat edge portion 160 that extends laterally from the lower end of the skirt portion 140. The side wall 120, flange portion 130, skirt portion 140, and edge portion 160 are provided continuously around the entire circumference of the lid 100 in the circumferential direction. Furthermore, a linear groove 131 is provided between the side wall 120 and the flange portion 130. When fitting the lid 100 onto the container body 200, the entire lid-side fitting portion 150 is slightly elastically deformed starting from the groove 131, making fitting easier.

[0018] Furthermore, the lid-side fitting portion 150 is partially provided at approximately the center of the skirt portion 140 on the long side of the lid 100 and at the four corners of the skirt portion 140 of the lid 100, but is not limited to this. The lid-side fitting portion 150 can be provided continuously or intermittently at any point on the skirt portion 140, such as providing the lid-side fitting portion 150 around the entire circumference of the lid 100. Also, the lid 100 is approximately rectangular in plan view, but is not limited to this. It can be any shape, such as approximately polygonal or approximately circular in plan view.

[0019] Furthermore, as shown in Figure 3(a), the lid-side fitting portion 150, which is provided below the flange portion 130, is configured to fit into the container-side fitting portion 250 of the container body 200, which will be described later. Specifically, the lid-side fitting portion 150 comprises an upper end 151 extending diagonally downward from the flange portion 130, a side end 152 continuous with the upper end 151, and a lid-side engaging portion 153 protruding inward from the side end 152. This lid-side engaging portion 153 is configured to engage with a part of the container-side fitting portion 250 of the container body 200, which will be described later, and is a so-called undercut portion. In addition, the lower end of the lid-side engaging portion 153 is provided with a lid-side inclined surface 170 that is inclined outward. The inner surface 172 of the lid-side inclined surface 170 is a flat inclined surface, the upper end 174 of the lid-side inclined surface 170 is continuous with the lid-side engaging portion 153, and the lower end 173 is continuous with the edge portion 160. Although the lid-side inclined surface 170 is directly continuous with the lower end of the lid-side engaging portion 153, it is not limited to this, and as will be described later, if the lid-side inclined surface 170 acts as a guide surface and facilitates the fitting of the lid-side fitting portion 150 and the container-side fitting portion 250, other surfaces or other configurations may be provided between the lid-side inclined surface 170 and the lid-side engaging portion 153, so that the lid-side inclined surface 170 is indirectly continuous with the lower end of the lid-side engaging portion 153. However, for the lid-side inclined surface 170 to function as a guide surface, a portion of the lid-side inclined surface 170 must be located directly below the lid-side engaging portion 153, that is, downward along the vertical axis Y, and must be the inclined surface closest to the lid-side engaging portion 153. Alternatively, the lid-side inclined surface 170 must be an inclined surface that abuts against a portion of the container-side fitting portion 250 just before the lid-side engaging portion 153 overcomes a portion of the container-side fitting portion 250 (for example, the container-side engaging portion 253) when the lid-side fitting portion 150 and the container-side fitting portion 250 are fitted together.

[0020] Furthermore, the lid-side inclined surface 170 is inclined relatively more towards the vertical axis Y than towards the horizontal axis X, and the angle α between the lid-side inclined surface 170 and the horizontal axis X is greater than the angle β between the lid-side inclined surface 170 and the vertical axis Y (α>β). Note that the horizontal axis X is the axis that extends in the direction along the horizontal plane when the lid 100 is placed on a horizontal plane, and the vertical axis Y is the axis that extends in the direction perpendicular to the said horizontal plane (vertical direction). In addition, the top surface 110 is a substantially flat surface, and when the lid 100 is placed on a horizontal plane, the top surface 110 becomes a surface that extends substantially along the horizontal plane. Therefore, the horizontal axis X is the axis that extends horizontally to the top surface, and the vertical axis Y is the axis that extends perpendicularly to the top surface.

[0021] Furthermore, in the lid-side inclined surface 170 shown in Figure 3, α is 60 degrees and β is 30 degrees, but this is not limited to this, and α can be changed as appropriate as any angle between 46 degrees and 80 degrees (46° ≤ α ≤ 80°). Note that if α is less than 46 degrees, the lid-side inclined surface 170 will be close to the horizontal axis X, and as will be described later, when fitting the lid 100 onto the container body 200, the frictional resistance between the lid-side inclined surface 170 and the container-side inclined surface 270 will increase, and the force required to fit them will increase. Also, if α exceeds 80 degrees, the lid-side inclined surface 170 will be nearly vertical, so when stacking the lids 100 for storage, the protrusion 171 of the upper lid 100 and the upper end 151 of the lower lid 100 will not be able to make firm contact, making it difficult to stack the lids 100 stably. Therefore, if α is between 46 and 80 degrees (46° ≤ α ≤ 80°), as will be described later, the lid 100 can be fitted onto the container body 200 with light force, and the lids 100 can be stacked stably.

[0022] In the case of the lid-side inclined surface 170 shown in Figure 3(a), the surface 172 of the lid-side inclined surface 170 is inclined relatively more significantly toward the vertical axis Y than toward the horizontal axis X, and the angle α between the surface 172 of the lid-side inclined surface 170 and the horizontal axis X is any angle between 46 and 80 degrees (46°≦α≦80°), but is not limited to this. For example, as shown in Figure 3(b), if the lid-side inclined surface 170 has a protrusion 171, the protrusion 171 of the lid-side inclined surface 170 is inclined relatively more significantly toward the vertical axis Y than toward the horizontal axis X, and the angle α' between the protrusion 171 of the lid-side inclined surface 170 and the horizontal axis X is greater than the angle β' between the protrusion 171 of the lid-side inclined surface 170 and the vertical axis Y (α'>β'). In this case, α' is 60 degrees and β' is 30 degrees. Furthermore, if the protrusion 171 of the lid-side inclined surface 170 is inclined relatively more significantly toward the vertical axis Y than toward the horizontal axis X, the surface 172 of the lid-side inclined surface 170 does not need to be inclined relatively more significantly toward the vertical axis Y than toward the horizontal axis X; for example, angle α may be 45 degrees. Also, although the angle α' of the protrusion 171 of the lid-side inclined surface 170 is 60 degrees, it is not limited to this, and the angle α' between the protrusion 171 of the lid-side inclined surface 170 and the horizontal axis X may be any angle between 46 degrees and 80 degrees (46°≦α'≦80°).

[0023] Furthermore, as shown in Figures 2(b) and 3(b), some of the lid-side inclined surfaces 170 of the lid-side fitting portion 150 are provided with inwardly protruding protrusions 171, and the surface 172 of the lid-side inclined surface 170 is uneven. Specifically, by providing multiple protrusions 171 that protrude linearly in the vertical direction on the surface 172, the surface 172 is configured to be uneven in areas where protrusions 171 are provided and areas where they are not. Note that the protrusions 171 are provided only on the lid-side inclined surfaces 170 provided on some of the corner portions of the lid 100, but are not limited to this, and may be provided on all of the lid-side inclined surfaces 170 provided on the lid 100.

[0024] Next, Figures 4 and 5 show the container body 200 that is covered by the lid 100 of the present invention. Figure 4(a) is a plan view of the container body 200, Figure 4(b) is a side view of the container body 200, Figure 5(a) is a DD end view of Figure 4(a), and Figure 5(b) is an EE end view of Figure 4(a).

[0025] As shown in Figures 4 and 5, the container body 200 has a shallow dish shape that opens upward, and is provided with a flat bottom wall 210 that is roughly rectangular in plan view, and legs 212 that bulge downward on the outer circumference 211 of the bottom wall 210. Multiple partitions 213 are provided on the bottom wall 210, protruding upward from the bottom wall 210 and arranged parallel to each other, and food such as rolled sushi can be stored in the space partitioned by the partitions 213. Furthermore, it is provided with a side wall 220 formed to rise from the outer circumference 211 of the bottom wall 210, a flange portion 230 extending outward from the side wall 220, a skirt portion 240 extending downward from the flange portion 230, a container-side fitting portion 250 provided on a part of the skirt portion 240, and a flat edge portion 260 extending laterally from the lower end of the skirt portion 240. Furthermore, the side wall 220, flange portion 230, skirt portion 240, and edge portion 260 are continuously provided around the entire circumference of the container body 200 in the circumferential direction.

[0026] The container-side fitting portion 250 is partially provided at approximately the center of the skirt portion 240 on the long side of the container body 200 and at the four corners of the skirt portion 240 of the container body 200, but is not limited to this. The container-side fitting portion 250 can be provided continuously or intermittently at any point on the skirt portion 240, such as around the entire circumference of the container body 200. Furthermore, the container body 200 is approximately rectangular in plan view, but is not limited to this. It can be any shape, such as approximately polygonal or approximately circular in plan view.

[0027] Furthermore, as shown in Figure 5(a), the container-side fitting portion 250, which is provided below the flange portion 230, is configured to fit with the lid-side fitting portion 150 of the lid 100. Specifically, the container-side fitting portion 250 includes a lower end 251 that extends diagonally upward from the edge portion 260, a side end 252 that is continuous with the lower end 251, and a container-side engaging portion 253 that protrudes outward from the side end 252. This container-side engaging portion 253 is configured to engage with the lid-side engaging portion 153 of the lid-side fitting portion 150 of the lid 100, which will be described later, and is a so-called undercut portion. In addition, the upper end of the container-side engaging portion 253 is provided with a container-side inclined surface 270 that slopes from the flange portion 230 toward the container-side engaging portion 253. The surface 272 of the container-side inclined surface 270 is a flat inclined surface. Although the container-side inclined surface 270 is directly continuous with the upper end of the container-side engaging portion 253, it is not limited to this. As will be described later, if the lid-side inclined surface 170 slides downward on the container-side inclined surface 270, making it easier to engage the lid-side fitting portion 150 and the container-side fitting portion 250, then other surfaces or other configurations may be provided between the container-side inclined surface 270 and the container-side engaging portion 253, so that the container-side inclined surface 270 is indirectly continuous with the upper end of the container-side engaging portion 253. However, in order to facilitate the engaging of the lid-side fitting portion 150 and the container-side fitting portion 250, a part of the container-side inclined surface 270 needs to be located directly above the container-side engaging portion 253, that is, upward along the vertical axis, and be the inclined surface closest to the container-side engaging portion 253. Alternatively, the container-side inclined surface 270 needs to be an inclined surface that abuts against a part of the lid-side fitting portion 150 just before the container-side engaging portion 253 overcomes a part of the lid-side fitting portion 150 (for example, the lid-side engaging portion 153) when the lid-side fitting portion 150 and the container-side fitting portion 250 are fitted together.

[0028] The lid 100 and the container body 200 are made from a sheet-like material with a thickness of approximately 0.1 mm to 1.00 mm, and are manufactured using sheet molding (e.g., vacuum forming, pressure forming, hot plate forming). For example, the material for the lid 100 and the container body 200 is not limited to polystyrene, polypropylene, polystyrene, A-PET, polylactic acid, or synthetic resins obtained by biaxial stretching of these materials; paper, metal, and other materials can also be used.

[0029] Next, the packaging container 300, in which the lid 100 of the present invention is fitted onto the container body 200, will be described with reference to Figures 6, 7, and 8. Figure 6(a) is a plan view of the packaging container 300 before the lid 100 is fitted onto the container body 200, Figure 6(b) is a side view of the packaging container 300, Figure 7(a) is an FF end view of Figure 6(a), Figure 7(b) is a GG end view of Figure 6(a), Figure 8(a) is an end view of the FF end view of Figure 6(a) in which the lid 100 is fitted onto the container body 200, and Figure 8(b) is an end view of the GG end view of Figure 6(a) in which the lid 100 is fitted onto the container body 200.

[0030] As shown in Figures 6 and 7, the packaging container 300, which comprises a lid 100 and a container body 200, is in a state where the lid 100 is simply placed on the container body 200, before the lid 100 and the container body 200 are fitted together. In this state, as shown in Figure 7(a), the surface 172 of the lid-side inclined surface 170 of the lid 100 is in contact with the container-side inclined surface 270 of the container body 200, and the lid-side fitting portion 150, which is continuous with the upper side of the lid-side inclined surface 170, and the container-side fitting portion 250, which is continuous with the lower side of the container-side inclined surface 270, are not fitted together.

[0031] Next, as shown in Figure 8, when the lid 100 is pressed downwards, the lid-side inclined surface 170 of the lid 100 slides downwards along the container-side inclined surface 270 of the container body 200, and the lid-side engaging portion 153 of the lid-side fitting portion 150 on the upper side of the lid-side inclined surface 170 overcomes the container-side engaging portion 253 of the container-side fitting portion 250 on the lower side of the container-side inclined surface 270, causing the lid-side fitting portion 150 and the container-side fitting portion 250 to engage with each other. Then, even if the lid 100 is lifted upwards and is about to come off the container body 200 unintentionally, the lid-side engaging portion 153 of the lid-side fitting portion 150 engages with the container-side engaging portion 253 of the container-side fitting portion 250, thus preventing the fitting between the lid-side fitting portion 150 and the container-side fitting portion 250 from coming undone unintentionally.

[0032] Thus, the fitting between the lid-side fitting portion 150 and the container-side fitting portion 250 is made difficult to disengage by the lid-side engaging portion 153 and the container-side engaging portion 253. On the other hand, when the lid 100 is pressed downwards, the lid-side inclined surface 170, which is continuous with the lower end of the lid-side engaging portion 153, can slide along the container-side inclined surface 270, which is continuous with the upper end of the container-side engaging portion 253. Therefore, the lid-side inclined surface 170 acts as a guide surface, making it easier to fit the lid-side fitting portion 150 and the container-side fitting portion 250.

[0033] In particular, as shown in Figure 3(a), the lid-side inclined surface 170, which is continuous with the lower end of the lid-side engaging portion 153 of the lid 100, is inclined more significantly with respect to the vertical axis Y than to the horizontal axis X with respect to the top surface 110. As a result, when the lid-side inclined surface 170 comes into contact with a part of the container-side inclined surface 270 or the container-side fitting portion 250, it is more likely to slide downward. Consequently, when the lid 100 is pressed downward, the lid-side inclined surface 170 slides smoothly downward over a part of the container-side inclined surface 270 or the container-side fitting portion 250, allowing the lid-side fitting portion 150 at the upper end of the lid-side inclined surface 170 to easily engage with the container-side fitting portion 250. Furthermore, because the lid-side inclined surface 170 slides smoothly downward, the lid 100 can be fitted onto the container body 200 even when the lid 100 is pressed downward with less force. Furthermore, since the lid 100 can be fitted onto the container body 200 with less force, work efficiency is improved and the burden on the worker is reduced.

[0034] Furthermore, as shown in Figure 7(b), by providing a protrusion 171 on the surface 172 of the lid-side inclined surface 170, the surface 172 is configured to have an uneven surface. Furthermore, when the lid 100 is simply placed on the container body 200, and before the lid 100 and the container body 200 are fitted together, the lid-side inclined surface 170 and the container-side inclined surface 270 have areas where they abut each other and areas where they do not, due to the concave and / or convex shapes. As a result, the lid-side inclined surface 170 and the container-side inclined surface 270 do not make full contact with each other, but only partially (more specifically, the surface 172 of the lid-side inclined surface 170 and the surface 272 of the container-side inclined surface 270 do not make full surface contact, and only the convex portion 171 of the lid-side inclined surface 170 contacts the surface 272 of the container-side inclined surface 270, while the surface 172 of the lid-side inclined surface 170 that does not have the convex portion 171 does not contact the surface 272 of the container-side inclined surface 270).

[0035] Therefore, the contact area between the lid-side inclined surface 170 and the container-side inclined surface 270 is reduced, resulting in less frictional resistance. As a result, when the lid-side inclined surface 170 comes into contact with the container-side inclined surface 270, it becomes easier for it to slide downwards. Consequently, when the lid 100 is pressed downwards, the lid-side inclined surface 170 slides more smoothly downwards on the container-side inclined surface 270, allowing the lid-side fitting portion 150 and the container-side fitting portion 250 at the upper end of the lid-side inclined surface 170 to engage more easily. Furthermore, because the lid-side inclined surface 170 slides smoothly downwards, the lid 100 can be fitted onto the container body 200 even when the lid 100 is pressed downwards with less force.

[0036] In Figure 7(b), the lid-side inclined surface 170 is configured with a bumpy surface by providing a protrusion 171 on the surface 172 of the lid-side inclined surface 170. However, the design is not limited to this, and the container-side inclined surface 270 may also be configured with a bumpy surface by providing a protrusion on the surface 272 of the container-side inclined surface 270. This reduces the contact area between the lid-side inclined surface 170 and the container-side inclined surface 270, thereby reducing frictional resistance. As a result, the lid-side inclined surface 170 becomes more prone to sliding downwards when it comes into contact with the container-side inclined surface 270. Furthermore, the lid-side inclined surface 170 or the container-side inclined surface 270 is configured to have a convex or concave shape by providing a protrusion 171, and the lid-side inclined surface 170 and the container-side inclined surface 270 have areas that come into contact with each other and areas that do not. However, the shape of the lid-side inclined surface 170 or the container-side inclined surface 270 can be changed to any shape as appropriate, as long as it has areas that come into contact with each other and areas that do not.

[0037] As shown in Figure 8, the lid-side fitting portion 150 of the lid 100 is externally fitted to the container-side fitting portion 250 of the container body 200. However, the design is not limited to this, and any fitting configuration can be adopted, such as internal fitting or internal and external fitting of the lid-side fitting portion 150 of the lid 100 to the container-side fitting portion 250 of the container body 200. Furthermore, as shown in Figures 7 and 8, the lid-side engaging portion 153 of the lid-side fitting portion 150 of the lid 100 is designed to engage with the container-side engaging portion 253 of the container-side fitting portion 250 of the container body 200. However, the design is not limited to this, and the lid-side engaging portion 153 of the lid-side fitting portion 150 may be configured to engage with any part of the container-side fitting portion 250, as long as the fitting between the lid-side fitting portion 150 and the container-side fitting portion 250 is difficult to disengage. Furthermore, as shown in Figure 7, the lid-side inclined surface 170 of the lid 100 is in contact with the container-side inclined surface 270 of the container body 200. However, the lid-side inclined surface 170 of the lid 100 may be configured to contact any point on the upper end side of the container-side fitting portion 250.

[0038] Furthermore, the lid and packaging container of the present invention are not limited to the above-described embodiments, and various modifications and combinations are possible within the scope of the claims and embodiments, and these modifications and combinations are also included within the scope of the patent rights.

Claims

[Claim 1] A container body having a container-side fitting portion, A lid having a top surface and a lid-side fitting portion provided continuously or intermittently around the entire circumference of the circumferential direction, which can be externally fitted to the container-side fitting portion on the outside of the top surface. A packaging container equipped with, The container-side fitting portion includes a container-side engaging portion that can engage with a part of the lid-side fitting portion, and a container-side inclined surface on the upper end side of the container-side engaging portion. The lid-side fitting portion includes a lid-side engaging portion that can engage with a part of the container-side fitting portion, and a lid-side inclined surface on the lower end side of the lid-side engaging portion. The inclined surface on the lid side is inclined more significantly towards the vertical axis relative to the top surface than towards the horizontal axis relative to the top surface. When the lid is placed on the container body, and before the lid side fitting portion is fitted into the container side fitting portion, the container side inclined surface and the lid side inclined surface have portions that come into contact with each other and portions that do not come into contact with each other. A packaging container characterized in that the surface of the inclined surface on the container side is configured to be uneven, by providing a protrusion that fits within the inclined surface on the container side and protrudes toward the engaging portion on the lid side, or by providing a protrusion that fits within the inclined surface on the lid side and protrudes toward the fitting portion on the container side, thereby configuring the surface of the inclined surface on the lid side to be uneven.

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