Lid for packaging container

Abstract

To provide a lid for a packaging container that prevents excessive deformation around opening and closing points of the lid even if the lid is opened and closed repeatedly.SOLUTION: A lid 100 of a packaging container 300 includes a top surface 120, a side surface 130 outside of the top surface 120, and a flange portion 140 outside of the side surface 130. A part of the flange portion 140 is provided with an opening / closing portion 170. The side surface 130 between the opening / closing portion 170 and the top surface 120 is provided with a sloping portion 174. Above the sloping portion 174. provided is an inclined portion 190 sloping downward from a corner 122 of the top surface 120. The inclined portion 190 is more gently sloped than the sloping portion 174.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lid for a packaging container. [Background technology]

[0002] 2. Description of the Related Art Conventionally, packaging containers consisting of a container body for containing food such as prepared dishes or condiments and a lid body that can be fitted onto the container body have been used in supermarkets, convenience stores, and the like.

[0003] For example, the lid of a packaging container in Patent Document 1 has a bulge for placing a finger on the flange near the corner of the lid, and a recessed inward recess on the slope near the corner of the top surface, which is the bending point when the lid is opened and closed, so that the lid can be easily removed from the container body, and this recess weakens the rigidity of the slope and makes it easier to deform. Then, by placing a finger on top of the bulge and pinching and pulling up the flange from the bottom side with other fingers, the lid is opened while elastically deforming the bulge and the flange on the outside of it, with the base of the slope as the center of rotation.

[0004] However, the lid of the packaging container in Patent Document 1 has a bulge to make it easier to apply force when opening the lid, and further has a recess to weaken its rigidity so that the lid can deform and open more easily. Therefore, when the lid is repeatedly opened and closed, it becomes prone to excessive deformation, and the deformation causes the area around the opening and closing points of the lid to become cloudy. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication 2010-202212 Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above problems, the present invention provides a lid for a packaging container that prevents the periphery of the opening and closing portion of the lid from being excessively deformed even when the lid is repeatedly opened and closed. [Means for solving the problem]

[0007] In order to solve the above problems, the lid for a packaging container according to claim 1 of the present invention is a lid for a packaging container having a top surface, a side surface on the outer side of the top surface, and a flange portion on the outer side of the side surface, an opening / closing portion is provided on a part of the flange portion, and the opening / closing portion is configured to be bendable so as to be able to open and close a part of an opening of a container body of the packaging container, and a slope portion is provided on the side surface between the opening / closing portion and the top surface, and an inclined portion is provided above the inclined portion, the inclined portion being inclined downward from a corner of the top surface, and the inclined portion is inclined more gently than the inclined portion. When the opening / closing section is opened or closed, the inclined surface portion becomes the starting point of bending, and the portion other than the inclined surface portion is bent. It is characterized by:

[0008] According to the above feature, the inclined portion is easily deformed while the slope portion is not easily deformed by the downward pressure applied when the opening / closing part is opened, so that when the pressure is released, the inclined portion is supported by the slope portion which is not easily deformed and easily returns to its original shape, and the corners of the top surface having the inclined portion can be prevented from deforming and becoming cloudy as if sinking. Therefore, even if the opening / closing part is repeatedly opened and closed, the surroundings of the opening / closing part, for example, the vicinity of the corners of the top surface, can be prevented from being excessively deformed. In addition, since the slope portion effectively acts as a starting point for bending when the opening / closing part is opened and closed, it is possible to effectively prevent the bending of the parts other than the slope portion when the opening / closing part is opened and closed, i.e., the surroundings of the opening / closing part from being inadvertently excessively deformed.

[0009] Furthermore, the lid of the packaging container according to claim 2 of the present invention teeth, The inclined surface portion is characterized by having a convex portion protruding outward.

[0010] According to the above feature, when opening and closing the opening / closing part, the finger comes into contact with the convex part, so that the finger can be prevented from touching parts other than the slope part, such as the corners of the top surface, as much as possible. This prevents parts other than the slope part from being deformed by the pressure of the finger, and the slope part effectively acts as a starting point for bending when the opening / closing part is opened and closed. Therefore, even if the opening / closing part is opened and closed repeatedly, it is possible to effectively prevent parts other than the slope part from bending, that is, to effectively prevent the periphery of the opening / closing part from being inadvertently excessively deformed. Effect of the Invention

[0011] The lid of the packaging container of the present invention can prevent the periphery of the opening and closing portion of the lid from being excessively deformed even when the lid is repeatedly opened and closed. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1A is a plan view of a cover according to a first embodiment of the present invention, FIG. 1B is an AA end view, and FIG. [Diagram 2] 1A is an enlarged perspective view of the vicinity of the opening and closing part of the lid, and FIG. [Diagram 3] FIG. 1A is a plan view of a container body covered with a lid according to a first embodiment of the present invention, FIG. 1B is a side view of the container body, and FIG. [Figure 4] 1A is a plan view of the packaging container, FIG. 1B is a side view of the packaging container, and FIG. 1C is a DD end view. [Diagram 5] 1A is an enlarged plan view of the cover when the opening and closing part is pinched with fingers to open it, and FIG. [Figure 6] 1A is an enlarged plan view of the lid when the opening and closing part of the lid is pinched open with fingers, and FIG. [Figure 7] FIG. 2 is a plan view of the packaging container with the opening and closing part open. [Figure 8] 1A is an enlarged perspective view of the periphery of the cutout portion of the lid, and FIG. 1B is a side view of the packaging container. [Figure 9]FIG. 6(a) is a plan view of a cover according to a second embodiment of the present invention, and FIG. [Figure 10] 9(a) is an enlarged perspective view of the vicinity of the opening and closing part of the lid, and (b) is a cross-sectional view of GG in FIG. 9(b) showing the opening and closing part pinched and opened with fingers. [Explanation of symbols]

[0013] 100 Lid 120 Top 122 Corner 130 Side 140 Flange part 170 Opening and closing section 174 Slope 190 Slope 300 Packaging containers DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this specification, "upward" refers to a direction that faces upward in the vertical direction when the lid of the packaging container is placed on a horizontal surface with the open side facing down, and "downward" refers to a direction that faces downward in the vertical direction.

[0015] <Embodiment 1> First, Fig. 1 and Fig. 2 show a lid 100 according to a first embodiment of the present invention. Fig. 1(a) is a plan view of the lid 100, Fig. 1(b) is an AA end view, Fig. 1(c) is a BB end view, Fig. 2(a) is an enlarged perspective view of the vicinity of an opening / closing part 170 of the lid 100, and Fig. 2(b) is a side view of the lid 100.

[0016] As shown in Fig. 1 and Fig. 2, the cover 100 is a shallow dish type opening downward, has a generally rectangular shape in plan view with corners 110 at the four corners, and includes a flat top surface 120 extending horizontally, a protrusion 121 protruding upward from the top surface 120, a side surface 130 continuing downward from the protrusion 121, a flat flange portion 140 extending outward from the lower end of the side surface 130, a mating groove 150 protruding upward from the flange portion 140, and a flat flange portion 160 extending laterally from the mating groove 150. The side surface 130, the flange portion 140, the mating groove 150, and the flange portion 160 are provided continuously or intermittently over the entire circumference of the cover 100 in the circumferential direction. The side surface 130 around the corner portion 110 is generally vertical, and the side surface 130 between the corner portions 110 is gently inclined. In addition, a gripping portion 111 is provided at the corner portion 110 so that the lid body 100 can be easily opened by gripping with fingers or the like. In addition, the lid body 100 has a generally rectangular shape in a plan view, but is not limited thereto, and can have any shape, such as a generally polygonal shape or a generally circular shape in a plan view.

[0017] The fitting groove 150 is formed by the inner wall 151 and the outer wall 152 facing each other and the upper wall 153 connecting the inner wall 151 and the outer wall 152, and is formed in a convex shape upward, with its inside being concave. The fitting groove 154 of the container body described later can be fitted inside the fitting groove 150, that is, the fitting groove 154 surrounded by the inner wall 151, the outer wall 152 and the upper wall 153. The fitting groove 150 extends in an annular shape around the circumferential direction of the lid 100, and can be fitted over the entire circumference with the annular fitting groove of the container body described later to reseal the container. The fitting groove 150 is formed in an annular shape continuously around the circumferential direction of the lid 100, but is not limited thereto, and may be formed partially around the circumferential direction of the lid 100.

[0018] In addition, the flange portion 140 near the corner portion 110 is provided with an opening / closing portion 170 having a generally triangular shape in plan view so that the lid body 100 can be partially opened and closed. On both sides of the base end 173 side (opposite the knob portion 111 at the tip) of the opening / closing portion 170, a cutout portion 180 is provided on the lower end 155 side of the outer wall 152 of the fitting recessed strip 150. The pair of cutout portions 180 are formed by cutting the outer wall 152 upward from the lower end 155 side, and are generally V-shaped or arc-shaped in side view. Although the cutout portion 180 is provided in the outer wall 152 of the fitting recessed strip 150, it does not reach the upper wall 153. Therefore, outer wall 152 located between tip 181 of cutout portion 180 and upper wall 153 is left uncut to a predetermined height, and outer wall 152 located between tip 181 of cutout portion 180 and upper wall 153 forms reinforcing portion 156 that reinforces the tip 181 side of cutout portion 180.

[0019] The opening / closing part 170 has a substantially triangular shape in a plan view, but is not limited thereto, and may have any shape as long as the lid body 100 can be partially opened and closed. The opening / closing part 170 is provided so as to diagonally cross the corner part 110, but is not limited thereto, and may be provided at any position on the lid body 100, for example, so as to be parallel to a side part located between the corner parts 110 on both sides. The notch parts 180 are provided on both sides of the base end 173 side of the opening / closing part 170 (opposite the knob part 111 at the tip), but is not limited thereto, and the notch parts 180 may be provided only on one end side of the base end 173 side of the opening / closing part 170. Further, the cutouts 180 on both sides of the opening / closing portion 170 are provided with reinforcing portions 156 on the tip 181 side, but this is not limited to this, and a reinforcing portion 156 may be provided on the tip 181 side of one cutout 180 and no reinforcing portion 156 may be provided on the tip 181 side of the other cutout 180, i.e., the tip 181 of the other cutout 180 may reach the upper wall 153.

[0020] Furthermore, a flat flange 160 extending laterally is provided at the lower end 155 of the outer wall 152, and the flange 160 is also provided continuously at the edge of the cutout 180. Therefore, the flange 160 is continuous and integrated from the lower end 155 of the outer wall 152 to the edge of the cutout 180. Note that the flange 160 is also provided at the edge of the cutout 180, but this is not limiting, and the flange 160 does not have to be provided at the edge of the cutout 180.

[0021] In addition, the opening / closing part 170 is formed with a flat recessed part 171 recessed inward. This recessed part 171 makes it easy to open the opening / closing part 170 by placing a finger or the like thereon. Furthermore, a slope part 174 continuing to the base end 173 of the opening / closing part 170 is provided on the side surface 130 between the opening / closing part 170 and the top surface 120. This slope part 174 is inclined obliquely downward from the top surface 120 toward the opening / closing part 170. Furthermore, the slope part 174 extends linearly toward the notches 180 on both sides, and the opening / closing part 170 is bent along the slope part 174 to make it easy to open and close. Furthermore, the slope part 174 is provided with a convex part 175 protruding outward. This convex part 175 protrudes toward the fitting concave strip 150 on the outer edge of the lid body 100 in a plan view as shown in FIG. 1(a), and is approximately semicircular in plan view. Moreover, convex portion 175 is located on an extension line (on line AA) of corner portion 122 of top surface 120 in plan view, and is adjacent to corner portion 122. Note that one convex portion 175 is provided on slope portion 174 between corner portion 122 of top surface 120 and opening / closing portion 170, but this is not limited thereto, and two or more may be provided. Furthermore, convex portion 175 is approximately semicircular in plan view, but this is not limited thereto, and it may be any shape, such as approximately trapezoidal in plan view, so long as it protrudes outward from the surface of slope portion 174.

[0022] Moreover, the corner 122 of the top surface 120 adjacent to the opening / closing portion 170 does not have a protrusion 121 formed thereon, and an inclined portion 190 is provided that inclines downward from the corner 122. The inclined portions 190 are provided on both sides of the center 123 of the corner 122, and the upper end 191 of the inclined portion 190 is continuous with the top surface 120, and the lower end 192 of the inclined portion 190 is continuous with the slope portion 174. Thus, the inclined portion 190 is located above the slope portion 174, and inclines downward from the corner 122 of the top surface 120. The inclined portion 190 is inclined more gently than the slope portion 174, and specifically, the inclination angle β of the inclined portion 190 with respect to the horizontal plane (or the top surface 120) is smaller than the inclination angle α of the slope portion 174 with respect to the horizontal plane (or the top surface 120) (β<α).

[0023] In addition, the central portion 123 of the corner portion 122 is not inclined and is flush with the surface of the top surface 120, so that the corner portion 122 has an uneven shape with the inclined portion 190 and the central portion 123. Therefore, the corner portion 122 of the top surface 120 has an increased strength due to the unevenness. Furthermore, the inclined portion 190 has a substantially triangular shape with a narrower width from the upper end 191 to the lower end 192, but is not limited to this, and the inclined portion 190 may have any shape, such as a substantially semicircular shape in a plan view, as described later, as long as it is located above the inclined surface portion 174 and is more gently inclined downward from the corner portion 122 of the top surface 120 than the inclined surface portion 174. In addition, two inclined portions 190 are provided at the corner portion 122, but is not limited to this, and one or three or more inclined portions may be provided at the corner portion 122.

[0024] Next, Fig. 3 shows a container body 200 to be covered by the lid 100 of the present invention. Fig. 3(a) is a plan view of the container body 200, Fig. 3(b) is a side view of the container body 200, and Fig. 3(c) is a CC end view.

[0025] As shown in Fig. 3, the container body 200 has a shallow dish shape that opens upward, and includes a flat bottom wall 210 that is substantially rectangular in plan view, and a leg portion 220 that bulges downward at the outer periphery 211 of the bottom wall 210. The leg portion 220 is configured to surround the outer side of the protrusion 121 of the top surface 120 of the lower lid body 100 when the packaging containers 300 are stacked, so that the stacked packaging containers 300 do not shift sideways. Furthermore, a side wall 230 is formed to rise from the outer periphery 211 of the bottom wall 210, and an upwardly protruding fitting protrusion 240 is provided at the upper end of the side wall 230 into which the fitting recess 150 of the lid body 100 fits. In addition, a flange portion 250 that extends sideways is formed at the lower end of the fitting protrusion 240. The side wall 230, the fitting protrusion 240, and the flange 250 are provided continuously or intermittently over the entire circumference in the circumferential direction of the container body 200. Although the container body 200 has a generally rectangular shape in a plan view, the shape is not limited thereto and may be any shape, such as a generally polygonal shape or a generally circular shape in a plan view.

[0026] The lid body 100 and the container body 200 are formed by sheet molding (e.g., vacuum forming, compressed air forming, hot plate forming) using a sheet-like material having a thickness of approximately 0.1 mm to 1.00 mm. For example, materials that can be used for the lid body 100 and the container body 200 include polystyrene, polypropylene, polystyrene, A-PET, polylactic acid, biaxially oriented versions of these, paper, metal, etc.

[0027] Next, a packaging container 300 in which the lid 100 of the present invention is fitted to the container body 200 will be described with reference to Fig. 4. Fig. 4(a) is a plan view of the packaging container 300, Fig. 4(b) is a side view of the packaging container 300, and Fig. 4(c) is a DD end view.

[0028] As shown in Fig. 4, the lid body 100 is placed over the container body 200, and the mating grooves 150 of the lid body 100 are mated with the mating protrusions 240 of the container body 200 over the entire circumference of the packaging container 300 in the circumferential direction, thereby resealing the packaging container 300. This prevents the contents contained in the container body 200 from leaking out and prevents foreign matter from entering the packaging container 300 from the outside. In addition, the flange 160 of the lid body 100 and the flange 250 of the container body 200 are in close contact with each other, which prevents foreign matter from entering the packaging container 300 from the outside and foreign matter from entering between the mating grooves 150 and the mating protrusions 240, causing the mating to come off accidentally.

[0029] In addition, various foods can be stored in the packaging container 300, and when using the foods, the lid 100 is removed from the container body 200 to remove the foods. However, when removing a small amount of small foods such as dried small sardines or chopped green onions, it is not necessary to open the entire lid 100, and as shown in Figs. 5 to 8, only the opening and closing part 170 of the lid 100 can be opened to easily remove a small amount of small foods. Fig. 5(a) is an enlarged plan view of the opening and closing part 170 held open by fingers, Fig. 5(b) is an EE end view, Fig. 6(a) is an enlarged plan view of the opening and closing part 170 held open by fingers, Fig. 6(b) is an FF end view, Fig. 7 is a plan view of the packaging container 300 with the opening and closing part 170 open, Fig. 8(a) is an enlarged perspective view of the periphery of the cutout part 180, and Fig. 8(b) is a side view of the packaging container 300.

[0030] As shown in Figures 5 and 6, when opening the opening / closing part 170 of the lid 100, the opening / closing part 170 is pinched with fingers or the like and pulled upward. At this time, there are multiple possible ways to open the opening / closing part 170, and they are not limited to the methods described below. For example, as shown in Figure 5, a method of pressing the vicinity of the corner 122 of the top surface 120 with the thumb F1 to open the opening / closing part 170, or as shown in Figure 6, a method of pressing the vicinity of the recessed part 171 of the opening / closing part 170 with the thumb F1 to open the opening / closing part 170, are possible.

[0031] First, referring to FIG. 5, a method of opening the opening / closing part 170 by pressing the vicinity of the corner 122 of the top surface 120 with the thumb F1 will be described. As shown in FIG. 5, the vicinity of the corner 122 of the top surface 120 of the lid body 100 is pressed with the thumb F1, and the index finger F2 is hooked on the back side of the knob part 111 of the lid body 100. Then, when the opening / closing part 170 is pinched with the thumb F1 and the index finger F2 and lifted upward, the opening / closing part 170 is bent toward the top surface 120 and opened. At that time, the inclined surface part 174 between the top surface 120 and the opening / closing part 170 becomes the starting point of bending, and the opening / closing part 170 opens upward. Also, the engagement between the fitting recess 150 provided on the outer edge of the opening / closing part 170 and the fitting protrusion 240 of the container body 200 is released.

[0032] As shown in FIG. 5, the thumb F1 presses the corner 122 of the top surface 120 of the lid 100, and the corner 122 is elastically deformed to bend slightly downward. At this time, the inclined portion 190 provided at the corner 122 is inclined downward, so that the downward pressing force of the thumb F1 is effectively absorbed and the inclined portion 190 is bent downward. The inclined portion 190 is provided on the upper side of the inclined surface 174, and is inclined more gently than the inclined surface 174. Therefore, when the thumb F1 presses the corner 122 of the top surface 120, most of the downward pressing force is applied to the upper inclined portion 190. Furthermore, the inclined portion 190 is inclined more gently than the inclined surface 174, so it is easily deformed by the downward pressing force of the thumb F1, but the inclined surface 174 is inclined more steeply in the vertical direction than the inclined portion 190, so it is not easily deformed by the downward pressing force of the thumb F1. In this way, the inclined portion 190 is easily deformed by the downward pressing force of the thumb F1, but the inclined surface portion 174 is not easily deformed, so that when the thumb F1 is released, the inclined portion 190 is easily restored to its original shape by being supported by the inclined surface portion 174 which is not easily deformed. Therefore, the inclined portion 190 also restores the corner portion 122 to its original shape, so that the corner portion 122 can be prevented from deforming and becoming cloudy as if sinking. In this way, according to the lid body 100 of the present invention, even if the opening and closing part 170 is repeatedly opened and closed, it is possible to prevent excessive deformation around the opening and closing part, for example, the vicinity of the corner portion 122 of the top surface 120.

[0033] In addition, since the inclined surface portion 174 is not easily deformed by a downward pressing force, it is easy to maintain the upright state as shown in Fig. 5. Therefore, stress is concentrated on the inclined surface portion 174 (particularly the base end 173 at the lower end of the inclined surface portion 174), which is also the connecting portion with the opening / closing portion 170, when the opening / closing portion 170 is pulled up, and the inclined surface portion 174 effectively acts as a starting point for bending when the opening / closing portion 170 is opened or closed. Therefore, when the opening / closing portion 170 is opened or closed, bending of the portions other than the inclined surface portion 174, that is, inadvertent excessive deformation of the periphery of the opening / closing portion, can be effectively prevented.

[0034] Next, referring to FIG. 6, a method of opening the opening / closing part 170 by pressing the vicinity of the recessed part 171 of the opening / closing part 170 with the thumb F1 will be described. As shown in FIG. 6, the thumb F1 presses the vicinity of the recessed part 171 of the opening / closing part 170 of the lid body 100, and the index finger F2 is hooked on the back side of the knob part 111 of the lid body 100. Then, when the opening / closing part 170 is pinched with the thumb F1 and the index finger F2 and lifted upward, the opening / closing part 170 is bent toward the top surface 120 and opened. At that time, the inclined surface part 174 between the top surface 120 and the opening / closing part 170 becomes the starting point of bending, and the opening / closing part 170 opens upward. Also, the engagement between the fitting recess 150 provided on the outer edge of the opening / closing part 170 and the fitting protrusion 240 of the container body 200 is released.

[0035] In addition, the inclined surface 174 is provided with a convex portion 175 protruding outward, so that the tip of the thumb F1 abuts against the convex portion 175. Therefore, when opening and closing the opening / closing part 170, it is possible to prevent the thumb F1 from touching a portion other than the inclined surface 174, such as the corner portion 122 of the top surface 120, as much as possible. This prevents a portion other than the inclined surface 174 from being deformed by the pressing force of the thumb F1, and the inclined surface 174 effectively acts as a starting point for bending when the opening / closing part 170 is opened and closed. In this way, according to the lid body 100 of the present invention, even if the opening / closing part 170 is repeatedly opened and closed, it is possible to effectively prevent a portion other than the inclined surface 174 from bending, that is, to effectively prevent the periphery of the opening / closing part from being inadvertently excessively deformed.

[0036] In addition, when opening and closing the opening / closing part 170, the notches 180 located on both sides of the inclined surface part 174 of the opening / closing part 170 also become the starting point of bending, making it easier to open and close the opening / closing part 170. As shown in Figs. 7 and 8, when the opening / closing part 170 bends starting from the notch 180, a bending line is formed from the tip 181 of the notch 180 to cross the fitting recessed strip 150. Specifically, a bending line X1 is formed on the outer wall 152 of the fitting recessed strip 150, and a bending line X2 is formed on the upper wall 153 of the fitting recessed strip 150, and the opening / closing part 170 bends upward at the bending lines X1 and X2.

[0037] 7 and 8, when the opening / closing part 170 is lifted upward, the notch 180 is deformed so as to open. On the other hand, since the tip 181 of the notch 180 does not reach the upper wall 153 and the reinforcing part 156 exists between the notch 180 and the upper wall 153, the outer wall 152 around the reinforcing part 156 is not easily deformed. Therefore, when the opening / closing part 170 is lifted upward, the notch 180 is deformed so as to be pulled upward while opening widely, but the outer wall 152 around the reinforcing part 156 which is not easily deformed is curled up and warped outward so that the bending line X1 becomes a valley while the lower end 155 side of the outer wall 152 is pulled upward by the notch 180.

[0038] Then, the outer wall 152 around the notch 180 is deformed so as to bend outward and warp, and the state in which the fitting groove 150 is bent inward from the notch 180 is temporarily fixed and maintained. Therefore, the opening / closing part 170 can be easily maintained in an open state, and small food can be easily taken out. For example, when only the opening / closing part 170 is open, the packaging container 300 can be tilted and shaken in a hand to easily take out small food. After the food is taken out, the opening / closing part 170 can be closed and the fitting groove 150 and the fitting protrusion 240 of the container body 200 can be fitted together to reseal the packaging container 300.

[0039] In addition, since the flange 160 is provided at the lower end 155 of the outer wall 152 of the fitting recess 150, the force generated when the opening / closing part 170 is lifted is easily transmitted to the entire outer wall 152, and the outer wall 152 is easily deformed by rolling up and warping outward. As a result, the opening / closing part 170 is more likely to maintain the open state. Furthermore, since the flange 160 is provided continuously on the edge of the cutout 180, the outer walls 152 on both sides of the cutout 180 are integrated and are more likely to deform by rolling up and warping outward.

[0040] <Embodiment 2> Next, Fig. 9 and Fig. 10 show a lid 100A according to embodiment 2 of the present invention. Fig. 9(a) is a plan view of the lid 100A, Fig. 9(b) is a GG end view, Fig. 10(a) is an enlarged perspective view of the vicinity of the opening / closing part 170A of the lid 100A, and Fig. 10(b) is a GG end view of Fig. 9(b) in a state where the opening / closing part 170A is pinched and opened with fingers. Note that the lid 100A according to embodiment 2 of the present invention has a different configuration of the inclined part 190A from the inclined part 190 of the lid 100 according to embodiment 1, but other configurations are basically the same as those of the lid 100 according to embodiment 1, so detailed description of the same configurations will be omitted.

[0041] As shown in Figs. 9 and 10, the corner 122A of the top surface 120A adjacent to the opening / closing portion 170A does not have a protrusion 121A, and an inclined portion 190A is provided that inclines downward from the corner 122A. This inclined portion 190A is substantially semicircular in plan view, and the upper end 191A of the inclined portion 190A is continuous with the top surface 120A, and the lower end 192A of the inclined portion 190A is continuous with the inclined surface portion 174A. More specifically, the upper end 191A of the inclined portion 190A is substantially semicircular in plan view, and the surface 193A of the inclined portion 190A is inclined downward from the upper end 191A to the lower end 192A in the center. Moreover, the inclined portion 190A is located above the inclined surface portion 174A, and the inclined portion 190A is inclined more gently than the inclined surface portion 174A. Furthermore, surface 193A of inclined portion 190A is curved slightly inward. Since inclined portion 190A is curved slightly inward, in this case, the inclination angle β' of the slope connecting upper end 191A and lower end 192A of inclined portion 190A with respect to the horizontal plane (or top surface 120A) is smaller than the inclination angle α' of inclined portion 174A with respect to the horizontal plane (or top surface 120A) (β'<α').

[0042] 10(b), when opening the opening / closing part 170A by pressing the vicinity of the corner 122A of the top surface 120A with the thumb F1, the thumb F1 presses the vicinity of the corner 122A of the top surface 120A of the lid body 100A, while the index finger F2 is hooked on the back side of the knob part 111A of the lid body 100A. Then, when the opening / closing part 170A is pinched with the thumb F1 and the index finger F2 and lifted upward, the opening / closing part 170A bends toward the top surface 120A and opens. At that time, the inclined surface 174A between the top surface 120A and the opening / closing part 170A becomes the starting point of bending, and the opening / closing part 170A opens upward.

[0043] As shown in FIG. 10(b), the thumb F1 presses the vicinity of the corner 122A of the top surface 120A of the lid 100A, so that the vicinity of the corner 122A is elastically deformed to bend slightly downward. At that time, the inclined portion 190A provided at the corner 122A is inclined downward, so that the downward pressing force of the thumb F1 is effectively absorbed and the inclined portion 190A bends downward. The inclined portion 190A is provided on the upper side of the inclined surface 174A, and the inclined portion 190A is inclined more gently than the inclined surface 174A. Therefore, when the thumb F1 presses the vicinity of the corner 122A of the top surface 120A, most of the downward pressing force is applied to the upper inclined portion 190A. Furthermore, since the inclined portion 190A is more gently inclined than the inclined surface portion 174A, it is easily deformed by the downward pressure of the thumb F1, whereas the inclined surface portion 174A has a steeper inclination in the vertical direction than the inclined portion 190A, so it is less likely to deform by the downward pressure of the thumb F1.

[0044] In this way, the inclined portion 190A is easily deformed and the inclined surface portion 174A is not easily deformed in response to the downward pressing force of the thumb F1, so that when the thumb F1 is released, the inclined portion 190A is easily restored to its original shape by being supported by the inclined surface portion 174A which is not easily deformed, and it is possible to prevent the corner portion 122A from sinking and becoming cloudy. In this way, according to the lid body 100A of the present invention, even if the opening and closing part 170A is repeatedly opened and closed, it is possible to prevent the periphery of the opening and closing part, for example, the vicinity of the corner portion 122A of the top surface 120A from being excessively deformed.

[0045] The lid body for the packaging container of the present invention is not limited to the above examples, and various modifications and combinations are possible within the scope and embodiments described in the claims, and these modifications and combinations are also included in the scope of rights.

Claims

1. A lid for a packaging container having a top surface, a side surface on the outer side of the top surface, and a flange portion on the outer side of the side surface, An opening / closing portion is provided on a part of the flange portion, The opening / closing portion is configured to be bendable so as to be able to open and close a part of an opening of a container body of the packaging container, A slope is provided on the side surface between the opening / closing portion and the top surface, An inclined portion is provided on the upper side of the inclined surface, the inclined portion inclining downward from a corner of the top surface, The inclined portion is more gently inclined than the inclined surface portion, A lid for a packaging container, characterized in that when the opening / closing part is opened or closed, the inclined part becomes a starting point of bending, and the part other than the inclined part is bent.

2. 2. The lid for a packaging container according to claim 1, wherein the inclined surface is provided with a convex portion that protrudes outward.

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