Lid, container with lid, and combination of lid and container

Abstract

Provided are a lid, a container with a lid, and a combination of a lid and a container, with which solid matter, such as ice, and a beverage can be added to a container, and with which erroneous drinking of the solid matter can be suppressed when the beverage is ingested after addition of the beverage and the solid matter.　Provided is a lid that is formed so as to be able to be joined to a container having an opening part formed at an upper end and an edge part forming an outer periphery of the opening part. The lid comprises: a base part which has a joining region corresponding part which corresponds to a region joined to the container along the edge part of the container, and a small opening part which has an opening area that is smaller than that of the opening part of the container; a small lid part for opening and closing the small opening part; and a hinge part for connecting the base part and the small lid part. The small lid part is configured to be rotatable with respect to the base part with the hinge part serving as an axis, and has a margin part established as a portion which satisfies the following condition 1 and condition 2. Condition 1: In a plan view of the base part, the margin part is a portion formed inside the base part from the inner edge of the joining region corresponding part, and outside the opening edge of the small opening part. Condition 2: In a plan view of the base part, when a line segment connecting the margin part and the hinge part is envisioned, the line segment passes through the opening edge of the small opening part.

Description

Lid, container with lid, and combination of lid and container

[0001] The present invention relates to a lid, a container with a lid, and a combination of a lid and a container.

[0002] BACKGROUND ART It is common practice to place food, beverages, etc. (hereinafter also referred to as "contents") in a container with an opening at the top and then attach a lid to provide the container in a closed state.

[0003] In retail stores (e.g., convenience stores) and restaurants (e.g., fast food restaurants), various types of provision are emerging in which store clerks provide contents to customers by placing the contents in a container and attaching a lid. For example, when the contents are beverages such as coffee or carbonated drinks, one provision type involves a process in which the customer pours the beverage into the container and attaches a lid. Another provision type involves a process in which a store clerk pours the beverage and attaches a lid in response to the customer's order.

[0004] Known methods for attaching a lid to a container include joining the lid to the rim that forms the outer periphery of the opening at the top of the container using a method such as heat pressing. When a beverage is the content, the lid has a small opening, for example, serving as a drinking spout, which is covered by the lid when the container is not in use. With such a lidded container, when a consumer drinks a beverage from the opening and then adds (tops up) the container, it is difficult to accurately pour the beverage into the drinking spout. In particular, when adding solids such as ice to the container in addition to the beverage, it is difficult to accurately place the ice in the container. To address this issue, a structure that peels (removes) the lid from the rim of the container is considered, as shown in Patent Document 1. Another known lidded container is one in which the lid is fused to the rim of the opening, as shown in Patent Document 2. Such containers are used for a variety of purposes, such as storing beverages such as coffee, miso soup, and various prepared foods. Plastic film materials are widely used as lids for such lidded containers.

[0005] JP 2014-84128 A JP 2015-101357 A

[0006] As with the technologies described in Patent Documents 1 and 2, when the lid is removed from the edge of a container, there is a possibility that a person who holds a beverage and solids such as ice in the container may put their mouth to the edge of the top end of the container and drink the beverage from the edge of the container, which may result in the accidental ingestion of the solids such as ice. This risk can be particularly serious when small children drink beverages from the edge of the container.

[0007] The present invention has been made in consideration of such problems, and aims to provide a lid, a container with a lid, and a combination of a lid and a container that allows solids such as ice and beverages to be added to a container, and that prevents the accidental ingestion of solids when consuming the beverage after adding the beverage and solids.

[0008] The present invention is summarized as follows: (1) to (20).

[0009] (1) A lid body according to (1), which is formed to be joinable to a container having an opening formed at an upper end and an edge portion forming an outer periphery of the opening, and which comprises: a base portion having a joining area corresponding to an area to be joined to the container along the edge of the container and a small opening having an opening area smaller than the opening of the container; a small lid portion for opening and closing the small opening; and a hinge portion connecting the base portion and the small lid portion, wherein the small lid portion is configured to be rotatable relative to the base portion about the hinge portion as an axis, and which has an eave portion of the base portion extending outward from the edge of the small opening in a plan view of the base portion. (2) The lid body according to (1), wherein the eave portion is a margin portion defined as a portion that satisfies the following conditions 1 and 2. Condition 1: In a plan view of the base portion, the margin portion is a portion of the base portion formed inward from the inner edge of the joining area corresponding to the area of ​​the base portion and outward from the edge of the small opening. Condition 2: When a line segment connecting the margin portion and the hinge portion is imagined in a plan view of the base portion, the line segment passes through the opening edge of the small opening. (3) The lid body described in (2) above, wherein the area of ​​the margin portion is smaller than the area of ​​the small opening in a plan view of the base portion. (4) The lid body described in (2) above, wherein the margin portion is formed so that the inner edge of the margin portion and the outer edge of the margin portion are non-concentric. (5) The lid body described in (2) above, wherein the margin portion has an inclined portion that slopes downward from the outer edge of the margin portion toward the inner edge of the margin portion. (6) The lid body described in (1) above, wherein a tab portion is provided on the upper surface of the small lid portion. (7) The lid body described in (6) above, wherein the tab portion has a tab member, and the tab member is joined to the upper surface of the small lid portion. (8) The lid body according to (7) above, wherein a part of the tab member intersects with the edge of the small opening in a plan view of the base when the small lid closes the small opening. (9) The lid body according to (6) above, which has a holding structure forming part that holds the small lid in a state in which the small opening is opened by rotating the small lid relative to the base about the hinge part as an axis, a claw part is provided on the knob part, and a receiving part is provided on the base part at a position that contacts the claw part, and the claw part and the receiving part form the holding structure forming part.(10) The lid according to (1) above, in which an extension is formed on the outer periphery of the base. (11) The lid according to (10) above, in which the lid has a holding structure forming part that holds the small lid in a state in which the small opening is opened by rotating the small lid relative to the base about the hinge part, and a knob part is provided on the upper surface of the small lid, and a claw part is provided on the knob, and the extension part and the claw part form the holding structure forming part. (12) The lid according to (10) or (11) above, in which the hinge part is formed between the extension part and the tip of the small lid. (13) The lid according to (1) above, in which a recess is formed in a part inside the joint area corresponding part. (14) The lid according to (1) above, in which a protrusion is formed on the outer periphery of the small lid, and a recessed part corresponding to the protrusion is formed on the opening edge of the small opening. (15) The lid body described in (1) above, wherein a recessed portion is formed on the outer peripheral edge of the small lid portion, and a convex portion corresponding to the recessed portion is formed on the opening edge of the small opening. (16) The lid body described in (1) above, wherein a connecting structure is formed connecting the outer peripheral edge of the small lid portion to the opening edge of the small opening, the connecting structure being a weak portion weaker than the small lid portion, and the weak portion is broken when the small lid portion rotates relative to the base portion around the hinge portion as an axis. (17) The lid body described in (16) above, wherein the weak portion has a combined structure of a connecting portion and a slit, and / or a half-cut structure. (18) The lid body described in (1) above, which is formed from a sheet material made of a resin material. (19) A container with a lid, comprising the lid body described in (1) above and a container having the opening formed at the upper end and the edge portion forming the outer periphery of the opening, and the lid body is joined to the container. (20) A combination of a lid and a container, comprising the lid described in (1) above and the container having the opening formed at the top end and the edge forming the outer periphery of the opening.

[0010] According to the present invention, a lid, a container with a lid, and a combination of a lid and a container are provided that allow solids such as ice and beverages to be added to a container, and that can prevent the accidental ingestion of solids when consuming a beverage after adding the beverage and solids, and that have excellent stability in the re-closed state.

[0011] FIG. 1A is a plan view showing an example of a lid according to the first embodiment. FIG. 1B is a cross-sectional view schematically showing a vertical cross section taken along line A-A in FIG. 1A. FIG. 2 is a plan view showing an example of a lid according to the first embodiment. FIG. 3A is a perspective view showing an example of a container with a lid. FIG. 3B is a cross-sectional view schematically showing a vertical cross section taken along line B-B in FIG. 3A. FIG. 4 is a plan view showing an example of a lid according to a first modified example of the first embodiment. FIG. 5 is a plan view showing an example of a lid according to a second embodiment. FIG. 6 is a plan view showing an example of a lid according to a second modified example of the second embodiment. FIG. 7 is a plan view showing an example of a lid according to a second modified example of the second embodiment. FIG. 8A is a cross-sectional view schematically showing a vertical cross section taken along line C-C in FIG. 7. FIG. 8B is a cross-sectional view schematically showing an example of a case in which a holding structure is formed on the lid. FIG. 9A is a plan view showing an example of a lid according to the first embodiment. FIG. 9B is a plan view showing an example of a lid according to Variation 6 of the first embodiment. FIG. 10 is a plan view showing an example of a lid according to Variation 3 of the first embodiment. FIG. 11 is a plan view showing an example of a lid according to Variation 1 of the second embodiment. FIG. 12 is a plan view showing an example of a lid according to Variation 1 of the second embodiment. FIG. 13 is a plan view showing an example of a lid according to Variation 2 of the first embodiment. FIG. 14A is a plan view schematically showing an example of a lid according to the third embodiment. FIG. 14B is a diagram for explaining a margin portion. FIG. 15A is a plan view showing an example of a lid according to Variation 4 of the first embodiment. FIG. 15B is a cross-sectional view for schematically explaining the state of the vertical cross section taken along line D-D in FIG. 15A. FIGS. 16A and 16B are cross-sectional views showing an example of a lid according to Variation 5 of the first embodiment. Fig. 17 is a plan view schematically illustrating an enlarged view of a region XS surrounded by a dashed line in Fig. 1. Fig. 18 is a cross-sectional view schematically illustrating an example of the boundary between the outer periphery of the small lid portion and the opening edge of the small opening in the lid according to the first embodiment. Figs. 19A and 19B are plan views illustrating an example of a lid according to a seventh modified example of the first embodiment. Fig. 20(a) is a plan view for explaining an example of the fourth embodiment. Fig. 20(b) is a cross-sectional view schematically illustrating the state of the vertical cross section taken along line A-A in Fig. 20(a).FIG. 21(a) is a plan view illustrating an example of the fourth embodiment. FIG. 21(b) is a cross-sectional view schematically illustrating a vertical cross section taken along line B-B in FIG. 21(a). FIGS. 22(a) and 22(b) are plan views illustrating an example of a modified version of the fourth embodiment. FIGS. 23(a) and 23(b) are plan views illustrating an example of a modified version of the fourth embodiment. FIGS. 24(a) and 24(b) are plan views illustrating an example of a modified version of the fourth embodiment. FIG. 25 is a plan view illustrating an example of a modified version of the fourth embodiment. FIGS. 26(a) and 26(b) are plan views illustrating a displacement facilitation structure in an example of the fourth embodiment. FIG. 26(c) is a cross-sectional view schematically illustrating a vertical cross section taken along line C-C in FIG. 26(b). FIG. 27 is a plan view illustrating an example of a modified version of the fourth embodiment. FIG. 28 is a partially enlarged cross-sectional view illustrating an example of the fourth embodiment. FIG. 29 is a perspective view showing an example of a lidded container in which a lid according to the fourth embodiment is attached to a container. FIG. 30 is a cross-sectional view schematically showing the state of the vertical cross section taken along line D-D in FIG. 29 . FIG. 31 is a perspective view showing an example of a lidded container in which a lid according to the fourth embodiment is attached to a container. FIG. 32 is a cross-sectional view showing an example of a lidded container in which a lid according to the fourth embodiment is attached to a container. FIG. 33(a) is a plan view for explaining an example of the fifth embodiment. FIG. 33(b) is a cross-sectional view schematically showing the state of the vertical cross section taken along line E-E in FIG. 33(a). FIG. 34(a) is a cross-sectional view schematically showing the state of the vertical cross section taken along line F-F in FIG. 33(a). FIG. 34(b) is a cross-sectional view schematically showing the state of the vertical cross section taken along line G-G in FIG. 33(a). FIG. 34(c) is a cross-sectional view schematically showing the state of the vertical cross section taken along line H-H in FIG. 33(a). FIG. 35 is a plan view for explaining an example of the fifth embodiment. Fig. 36 is a plan view for explaining one example of the fifth embodiment. Fig. 37 is a cross-sectional view for explaining one example of the fifth embodiment. Fig. 38 is a perspective view showing an example of a lidded container in which a lid according to the fifth embodiment is attached to a container. Fig. 39 is a cross-sectional view showing an example of a lidded container in which a lid according to the fifth embodiment is attached to a container. Fig. 40 is a partially enlarged cross-sectional view for explaining one example of the fifth embodiment.FIG. 41(a) is a plan view illustrating an example of the sixth embodiment. FIG. 41(b) is a cross-sectional view schematically illustrating a vertical cross section taken along line II in FIG. 41(a). FIG. 42 is a cross-sectional view illustrating an example of a lidded container in which a lid according to a modified example of the sixth embodiment is attached to a container. FIG. 43A is a plan view illustrating an example of a lid according to the seventh embodiment. FIG. 43B is a cross-sectional view schematically illustrating a vertical cross section taken along line A-A in FIG. 43A. FIG. 44 is a cross-sectional view illustrating an example of a state in which the lid according to the seventh embodiment is attached to a container. FIG. 45 is a plan view illustrating an example of a state in which the lid according to the seventh embodiment is attached to a container. FIG. 46A is a plan view illustrating an example of a lid according to the eighth embodiment. FIG. 46B is a cross-sectional view schematically illustrating a vertical cross section taken along line B-B in FIG. 46A. FIG. 47 is a cross-sectional view illustrating an example of a state in which the lid according to the eighth embodiment is attached to a container. FIG. 48 is a plan view illustrating an example of a state in which the lid of the eighth embodiment is attached to a container. FIG. 49A is a plan view illustrating an example of a lid according to Modification 1 of the seventh embodiment. FIG. 49B is a diagram schematically illustrating a vertical cross section taken along line CC of FIG. 49A. FIGS. 50A and 50B are plan views illustrating an example of a lid according to Modification 2 of the seventh embodiment. FIG. 51A is a plan view illustrating an example of a lid according to Modification 5 of the seventh embodiment. FIG. 51B is a plan view illustrating an example of a lid according to Modification 4 of the seventh embodiment. FIGS. 52A and 52B are plan views illustrating an example of a lid according to Modification 6 of the seventh embodiment. FIG. 53A is a plan view illustrating an example of a lid according to Modification 1 of the eighth embodiment. FIG. 53B is a cross-sectional view schematically illustrating a vertical cross section taken along line DD of FIG. 53A. FIG. 54A is a plan view illustrating an example of a lid according to Modification 2 of the eighth embodiment. Fig. 54B is a cross-sectional view schematically showing the state of a vertical cross section taken along line E-E in Fig. 54A. Fig. 55A is a plan view for explaining an example of a lid according to the ninth embodiment. Fig. 55B is a cross-sectional view schematically showing the state of a vertical cross section taken along line F-F in Fig. 55A. Fig. 56A is a plan view showing an example of a lidded container according to the tenth embodiment.FIG. 56B is a diagram for explaining the connection structure. FIG. 57 is a cross-sectional view showing a longitudinal section taken along line A-A in FIG. 56, and is a schematic cross-sectional view of a lidded container. FIG. 58 is a cross-sectional view showing an example of a connecting portion. FIG. 59 is a plan view showing an example of a lidded container according to the eleventh embodiment. FIG. 60 is a plan view showing an example of a lidded container according to the twelfth embodiment. FIG. 61 is a plan view showing an example of a lidded container according to the thirteenth embodiment. FIG. 62 is a plan view showing an example of a lid according to the fourteenth embodiment. FIG. 63 is a cross-sectional view for explaining a state in which the lid according to the fourteenth embodiment is attached to a container. FIG. 64 is a schematic view showing an example of a lid according to the seventh to ninth embodiments. FIG. 65 is a schematic view showing an example of a lid according to the seventh to ninth embodiments. FIG. 66 is a schematic view showing an example of a lid according to the first embodiment. FIG. 67 is a schematic view showing an example of a lid according to the seventh to ninth embodiments.

[0012] The lid of the present invention will be described in detail below with reference to the drawings. The lid of the present invention will be described as a lid used for a container (cup) for holding various beverages, such as a coffee cup. However, the lid is not limited to a lid for a beverage container and can also be used for a container for holding food items other than beverages, such as prepared meals. The lid of the present invention can also be used for containers that can hold various items other than food and beverages, such as parts such as bolts and nuts, or items other than those mentioned above. Furthermore, the lid of the present invention will be described below using an example in which the shape of the lid is circular when viewed from above. However, the shape of the lid is not limited to a circular shape when viewed from above. It can also be used for various shapes other than circles, such as ellipses, polygons such as rectangles and triangles, chamfered rectangles, and chamfered polygons.

[0013] Hereinafter, embodiments and application examples related to the present invention will be described in order with reference to the drawings. In this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals, and duplicated explanations will be omitted. Note that the embodiments, modifications, and application examples described below may be applied in appropriate combinations.

[0014] The following description is a preferred example of the present invention, and the content of the present invention is not limited to these embodiments. Furthermore, in the following description, directions such as front-to-back, left-to-right, and up-down, as well as directions on a horizontal plane, are shown for the sake of convenience, but the content of the present invention is not limited to these directions. In the examples of FIGS. 1 to 67 , the Z-axis direction is the up-down direction (the upper side is the +Z direction, the lower side is the −Z direction), the X-axis direction is the front-to-back direction (the rear side is the +X direction, the front side is the −X direction), the X-axis direction and the Y-axis direction are the directions along the mutually orthogonal X-axis and Y-axis defined on a plane normal to the Z-axis direction, and the XY plane, which is the plane spanned by the X-axis and Y-axis, is the horizontal plane. The description will be based on these. The relative magnitude ratios of sizes and other characteristics shown in each of FIGS. 1 to 67 are shown for convenience and, unless otherwise specified, do not limit the actual magnitude ratios.

[0015] [1 First Embodiment] [1-1 Configuration] As will be described later with reference to Figures 3A and 3B, the lid 1 according to the first embodiment is configured to be bondable to a container having an opening 102 formed at its upper end and an edge 103 that forms the upper edge of the periphery of the opening 102. Figures 3A and 3B are perspective and cross-sectional views showing an example of a lid-equipped container 150 in which the lid 1 shown in Figures 1A, 1B, and 2 is bonded to a container 101. The lid 1 can be used by being bonded along the edge 103. In the lid 1, the region bonded to the edge 103 in a plan view of the lid 1 is referred to as a bonding region R. Figure 1A is a plan view showing one example of the lid 1. Figure 1B is a cross-sectional view schematically showing a vertical cross section taken along line A-A in Figure 1A. Figure 2 is a diagram showing an example of a margin region 10 and a small opening 6, which will be described later. Note that a container 101 having flexibility at the edge 103 of the opening 102 is more preferably used. However, this does not prohibit the container 101 from being a container with little or no flexibility, such as a metal container.

[0016] 1A and 1B, the bonding region R corresponds to a region formed in a generally annular shape along the opening 102 of the container 101 in a shape that corresponds to the opening 102. When the bonding region R between the lid 1 and the container 101 is not continuously bonded, the portion sandwiched between adjacent bonding regions R and facing the edge 103 is also included in the bonding region corresponding portion 5.

[0017] (Material of the Lid) The material of the lid 1 is not particularly limited and examples thereof include paper-based materials, plastics, metals, etc., but is preferably a paper-based material or plastic. When a paper-based material is used, examples of the paper-based material include so-called paper obtained by weaving a slurry of a fiber raw material onto a screen, drying or pressing it to dry it, and making it into a sheet, so-called airlaid sheets obtained by stacking spread fiber raw materials such as ground pulp obtained by pulverizing a raw material sheet made of pulp-based fibers or the like in a grinder, using an air flow to stack the fibers of the stack, and fixing them together with a binder, so-called papers produced by agglutinating plant fibers and other fibers, as well as chemical fiber paper, synthetic paper, waterproof paper, coated paper, substitute paper, parchment, wool paper, glass fiber paper, stone paper, ceramic paper, etc., and laminates of multiple sheets of these. Furthermore, the paper-based material may be composed solely of pulp or may contain non-pulp fibers such as natural, synthetic, or recycled fibers. However, it is preferable for the paper-based material to contain 50% or more by weight of pulp, more preferably 70% or more by weight, and even more preferably 80% or more by weight, with 100% pulp being particularly preferred. Paper-based materials can also be composites of synthetic or natural resin films, nonwoven fabrics, wood-based materials such as wood foil, and even aluminum foil. When composite materials are used, the composite material preferably contains 50% or more by weight of pulp as a whole, and particularly preferably 80% or more by weight of pulp. The higher the pulp content, the more easily the paper-based material is biodegraded, which is preferable. Furthermore, when plastic is used as the material for the lid 10, it is preferable to use a sheet-like resin sheet material. Plastic refers to synthetic resins in general that have plasticity, such as polyethylene (PE), polypropylene (PP), PET, ABS, polystyrene, rayon, polyvinyl chloride, EVAC, PVAL, PVDC, PTFE, and silicone. Furthermore, when a resin sheet is used as the material for the lid 10, it is also preferable that the material be translucent. When a translucent or transparent film material is used, the contents contained in the container 101 can be more easily viewed when the lid 10 is sealed to the container 101 and the inside of the container 101 is hermetically sealed.In this way, when a translucent or transparent film material is used, the contents of the container 101 can be checked without peeling the lid 10 off the container 101, making it easier to notice if contents different from those intended are contained, and significantly reducing the risk of mixing up the contents.

[0018] It is preferable that the entire lid body 1 be formed from the above-mentioned paper-based material. However, this does not prohibit the lid body 1 from being partially or entirely formed from a material other than the paper-based material. For example, only the base portion 2A1 of the lid body 1, which will be described later, may be formed from a laminate of a paper-based material and a resin film material. In this case, the lid body 1 can be easily joined to the container 101 by appropriately using a sealing method such as a pressing method, a heat sealing method, or an ultrasonic welding method with the surface of the lid body 1 on which the film material is arranged facing the container 101. In consideration of these points, the lid body 1 is preferably also formed from a laminate including a paper-based material. It is also preferable that the small lid portion 3 be formed from a laminate including a paper-based material.

[0019] As shown in FIGS. 1A and 1B, the cover 1 has a base portion 2A1, a small cover portion 3, and a hinge portion 7.

[0020] (Base portion) The base portion 2A1 is defined as a portion that has a bonding area corresponding portion 5 and forms the small opening 6. The base portion 2A1 can be a portion that determines a reference for displacement of the small lid portion 3, which will be described later. In the example of Fig. 1A, the base portion 2A1 and the small lid portion 3 form the exposed surface 70 of the lid body 1 in a plan view of the lid body 1.

[0021] (Joining Area Corresponding Portion) The joining area corresponding portion 5 is a portion of the lid 1 corresponding to the joining area R (a region facing the edge portion 103 of the container 101 and joined to the container 101). In the case of a lid-equipped container 150, the joining area corresponding portion 5 is a portion of the lid 1 that forms the joining area 151 between the lid 1 and the container 101. Specifically, in a plan view of the lid 1 (in the example of FIG. 1A , the line of sight is the Z-axis direction (vertical direction)), the portion of the base portion 2A1 that forms the joining area R is defined as the joining area corresponding portion 5. The joining area corresponding portion 5 is typically formed in an annular shape as shown in FIG. 1A . In particular, when the edge portion 103 of the container 101 is formed in a roughly annular shape as shown in FIGS. 3A and 3B , the joining area R is also formed in an annular shape, and the joining area corresponding portion 5 is also roughly annular in a plan view of the lid 1. The outer edge of the joining area corresponding portion 5 is determined according to the position of the outer edge of the joining area R. The outer edge of the corresponding joint area 5 may be located on the outer periphery 2A of the base portion 2A1, or may be located inside the outer periphery 2A of the base portion 2A1 as shown in the example of FIG. 1A.

[0022] (Small Opening) The small opening 6 is formed to penetrate the surface 73A of the lid 1 facing the container 101 and the surface of the lid 1 not facing the container 101 (the exposed surface 70 of the lid 1). The small opening 6 is formed inside the portion of the lid 1 corresponding to the joining area corresponding portion 5 in a plan view so as to have a smaller opening area than the opening 102 of the container 101. The small opening 6 is intended to form an opening for the contents (e.g., beverages, food, etc.) in the space 105 of the container 101 when the lid 1 is joined to the container 101. The small opening 6 forms the opening forming portion 4 in combination with the small lid portion 3 described below.

[0023] (Opening Forming Portion) As shown in FIG. 1A and other figures, the opening forming portion 4 is defined as a portion having the small opening 6 and the small lid portion 3. In the opening forming portion 4, the small opening 6 opens and closes as the small lid portion 3 is displaced. The opening forming portion 4 is formed so that, as shown in FIG. 1A , the small lid portion 3 closes the small opening 6, and the small lid portion 3 is displaced to open the small opening 6. When the small lid portion 3 is rotated so as to be pulled up relative to the base portion 2A1, the small opening 6 is exposed, forming an exposed opening. In other words, the opening forming portion 4 combines the small opening 6 and the small lid portion 3 so that when the small lid portion 3 is pulled up with the lid body 1 attached to the container 101, the space portion 105 of the container 101 can be seen through the small opening 6.

[0024] When the small opening 6 is in the exposed state, it can be used as a supply port for additional liquid such as a beverage or solids such as ice, as will be described later. Furthermore, when a liquid such as a beverage is present inside the container 101 (space 105), the small opening 6 may be used as a drinking port or a pouring port for the beverage.

[0025] (Small Lid Portion) The lid body 1 is provided with a small lid portion 3. The small lid portion 3 is formed to be able to cover the small opening 6 in an openable and closable manner. In the example of FIG. 1A , the small lid portion 3 is formed so that it can be lifted up relative to the base portion 2A1, as shown in FIG. 3B , and the small opening 6 is formed (opened) when the small lid portion 3 is lifted up. In the example shown in FIG. 1A , the shape of the small lid portion 3 can be determined so that the outer peripheral contour shape of the small lid portion 3 conforms to the shape of the opening edge 6G of the small opening 6 when the small lid portion 3 closes the small opening 6. In this case, it is easy to bring the end surface of the outer peripheral edge 3A of the small lid portion 3 into contact with the end surface of the opening edge 6G of the small opening 6 when the small lid portion 3 closes the small opening 6.

[0026] In the lid body 1 shown in the example of FIG. 1A , the small lid portion 3 is provided inside (toward the center CT) the joint area corresponding portion 5 in a plan view of the lid body 1. The small lid portion 3 is displaced (rotated) so as to be in a lifted state. The small lid portion 3 is connected to the base portion 2A1 by a hinge portion 7. As the small lid portion 3 is lifted around the hinge portion 7 as a support axis, the small opening 6 is exposed.

[0027] The shape and structure of the small lid portion 3 are not particularly limited as long as they are shaped and structured to form the margin portion 10 described below. In the example of FIG. 1A , the shape of the front edge 75A of the outer periphery 3A of the small lid portion 3 is located inside the joining region R, and the width W of the small lid portion 3 is formed to increase from the front edge 75A toward the base end 74A. The width W of the small lid portion is determined as follows. That is, assuming that a straight line DL passing through position SB1 and extending in the direction of the hinge portion 7 is a predetermined position SB1 of the outer periphery of the small lid portion, the intersection position of the straight line DL and the outer periphery of the small lid portion (but a position different from position SB1) (corresponding position SB2) is determined. Then, the distance between positions SB1 and SB2 is determined, and this distance is defined as the width W.

[0028] In the lid body 1 according to the first embodiment, the center CT of the lid body 1 is not limited to being located in the small lid portion 3 as shown in FIG. 1, etc., but may be configured so that the small lid portion 3 does not include the center CT of the lid body 1 as shown in FIG. 9A.

[0029] In the lid body 1, when the small lid portion 3 is raised, the small opening 6 is exposed as described above. This state is called the open lid state. When the small opening 6 is covered by the small lid portion 3, it is called the closed lid state.

[0030] The lid body 1 can be closed again even after it has been opened (after the small opening 6 has been exposed by the small lid portion 3 being raised), and when it is closed, the end face (outer peripheral end face) of the outer peripheral edge 3A of the small lid portion 3 can face the end face of the opening edge 6G of the small opening 6 in the base portion 2A1.

[0031] (Hinge Portion) As described above, the cover 1 has the hinge portion 7. The hinge portion 7 is generally configured by a portion corresponding to a line segment connecting the two base ends 74A along the outer periphery 3A of the small cover 3, and corresponds to the boundary between the base portion 2A1 and the small cover 3. The hinge portion 7 is a portion that serves as a rotation axis when the small cover 3 rotates. However, when the small cover 3 rotates, it is not only the case where the small cover 3 rises from the base portion 2A1 at a fixed angle at the position of the hinge portion 7, but also the case where the small cover 3 rises while gradually curving from the hinge portion 7 toward the front edge 75A of the small cover 3, as shown in FIG. 3B etc.

[0032] The base portion 2A1 is connected to the small cover portion 3 at least by a hinge portion 7. The structure of the hinge portion 7 is not particularly limited as long as it is a portion that is defined as the boundary between the base portion 2A1 and the small cover portion 3. The hinge portion 7 may have a perforated structure or a half-cut portion, similar to the connection structure 17 described below.

[0033] (Connection Structure Between Base Portion and Small Lid Portion) The lid body 1 may have a structure (connection structure 17) formed in which the opening edge 6G of the small opening 6 in the base portion 2A1 is connected to the outer peripheral edge 3A of the small lid portion 3. The connection structure 17 is preferably configured as a weakened portion that is weaker than the small lid portion 3. Because the connection structure 17 is a weakened portion, the weakened portion can be broken when the small lid portion 3 rotates relative to the base portion 2A1 around the hinge portion 7. In other words, the small lid portion 3 is separated from the base portion 2A1 generally along the connection structure 17 and rises up relative to the base portion 2A1.

[0034] In the example shown in FIG. 1 , the connection structure 17 has a combined structure of a continuous portion 18A and a cut portion 18B, as shown in FIG. 17 . FIG. 17 is an enlarged plan view of the area XS surrounded by the dashed line in FIG. 1 , and is a schematic diagram illustrating one embodiment of the connection structure 17. The combined structure may be, for example, a structure in which combined structures of a continuous portion 18A and a cut portion 18B are alternately arranged along the longitudinal direction of the portion where the end face of the opening edge 6G of the small opening 6 faces the end face of the outer peripheral edge 3A of the small lid portion 3 (a so-called perforated structure). Furthermore, the connection structure 17 is not limited to a perforated structure and may also be, for example, a half-cut portion 16 as shown in FIG. 18 . The half-cut portion 16 is defined as a portion cut halfway through the thickness direction of the lid body 1, as shown in FIG. 18 . The half-cut portion 16 is not limited to a portion cut halfway through the thickness direction of the lid body 1. The half-cut portion 16 includes a structure in which the lid body 1 is cut into at least half of its thickness while avoiding penetration, and a structure in which the lid body 1 is cut into the thickness direction to an extent less than half of its thickness.

[0035] In addition, when the connection structure 17 has the continuous portion 18A and the cut portion 18B, the continuous portion 18A may have a structure corresponding to the half-cut portion 16.

[0036] (Eaves portion) The lid 1 has an eave portion. The eave portion is formed as part of the base portion 2A1. In a plan view of the base portion 2A1, the eave portion is configured as a portion of the base portion 2A1 formed inward from the inner edge of the joint area corresponding portion 5 and outward from the opening edge 6G of the small opening 6. By forming the eave portion on the lid 1, when the small opening 6 is in an open state (open lid state), solid objects will collide with the eave portion when consuming a beverage or the like using the small opening 6 as a drinking spout, thereby preventing the accidental ingestion of solid objects. In the example of Figure 1 and the like, a margin portion 10 is formed as the eave portion on the lid 1. In the following explanation, we will continue with an example in which the eave portion is the margin portion 10.

[0037] (Margin) As shown in Figures 1A, 1B, 2, etc., the cover 1 has a margin 10. The margin 10 is defined as a portion that satisfies the following conditions 1 and 2.

[0038] Condition 1: In a plan view of the base portion 2A1, the margin portion 10 is a portion of the base portion 2A1 formed inward from the inner edge of the corresponding joint region 5.

[0039] Condition 2: When a line segment connecting the margin portion 10 and the hinge portion 7 is imagined in a plan view of the base portion 2A1, the line segment passes through the opening edge 6G of the small opening 6.

[0040] The plan view of the base portion 2A1 refers to the case where the base portion 2A1 is viewed from the +Z side toward the −Z side along the Z axis direction in FIGS. 1A and 1B.

[0041] Regarding condition 1, the margin portion 10 is formed on the base portion 2A1, and therefore is outside the small lid portion 3. Regarding condition 2, for example, as shown in FIG. 1A , if a line segment M is assumed to connect the position P1 of the margin portion 10 to the position P2 of the hinge portion 7, the line segment M passes through the opening edge 6G of the small opening 6. When viewed from the position of the hinge portion 7, the margin portion 10 is outside the position of the opening edge 6G. Therefore, in the example of FIG. 2 , the margin portion 10 is identified as the hatched portion S1 in FIG. 2 as a portion different from the joint area corresponding portion 5 and the small lid portion 3. The hatched portion S2 corresponds to the small opening 6. In the example of FIG. 1 , the portion S2 also corresponds to the small lid portion 3. FIG. 2 is a plan view showing the portion that becomes the margin portion 10 in the lid body 1 of FIG. 1 .

[0042] (Area of ​​Margin Portion and Area of ​​Small Opening) While the size of the margin portion 10 is not particularly limited, it is preferable that the area of ​​the margin portion 10 be smaller than the area of ​​the small opening 6 in a plan view of the base portion 2A1. That is, in the example of FIG. 2, the area of ​​the portion S1 corresponding to the margin portion 10 is smaller than the area of ​​the portion S2 corresponding to the small opening 6. In this case, since the size of the small opening 6 is larger than the size of the margin portion 10, when the container with lid 150 is in a state in which the small opening 6 is open (open state), it becomes easy to add a liquid such as a beverage or a solid such as ice to the space portion 105 of the container 101. Note that the criteria for specifying the area of ​​the margin portion 10 and the area of ​​the small opening 6 refer to the area in a plan view of the lid 1 (when the line of sight is from the +Z direction to the −Z direction in FIG. 2). The criteria for specifying the area shown here also apply to the area of ​​the first portion, which will be described later.

[0043] (Area of ​​Margin Portion and Area of ​​First Portion) The area of ​​the margin portion 10 is preferably larger than the area of ​​the first portion 5E of the corresponding bonding region 5. Here, the first portion 5E is a portion specified as follows.

[0044] When it is assumed that the base portion 2A1 is divided into two parts by an extension line ME extending outward along the hinge portion 7, the part of the joint area corresponding portion 5 formed in the part including the small opening 6 is defined as the first part 5E, and the part of the joint area corresponding portion 5 excluding the first part 5E is defined as the second part 5F.

[0045] When the area of ​​margin 10 is larger than the area of ​​first portion 5E of joint area corresponding portion 5, margin 10 can be easily bent slightly in the vertical direction relative to first portion 5E. When small opening 6 is in the open state (open lid state), if a solid object hits margin 10 while taking a beverage or the like through small opening 6, margin 10 is more likely to bend, making it easier to buffer the force applied to the margin 10 by the solid object.

[0046] (Shape of Margin) The shape of the margin 10 is determined according to the shapes of the small opening 6 and the bonding area corresponding portion 5. Preferably, the inner edge 10C and the outer edge 10D of the margin 10 are formed non-concentrically. Here, "non-concentric" means that at least one of the contour shapes of the inner edge 10C of the margin 10 and the contour shape of the outer edge 10D of the margin 10 deviates from an arc shape centered on the center CT of the lid 1. In the example of FIG. 2, the contour shape of the inner edge 10C of the margin 10 is formed non-arcuately and deviates from an arc shape centered on the center CT of the lid 1. However, this does not prohibit the contour shape of the inner edge 10C of the margin 10 and the contour shape of the outer edge 10D of the margin 10 from being arc shape centered on the center CT of the lid 1, as shown in the examples of FIGS. 9A and 9B. 9A and 9B are plan views showing another example of the lid body 1 of the first embodiment.

[0047] (Extension Portion) In the lid body 1 according to the first embodiment, an extension portion 7C may be formed on the outer peripheral edge 2A of the base portion 2A1. In the example shown in Figures 1A and 1B, the position of the extension portion 7C is determined on the outer peripheral edge 2A of the base portion 2A1 so that the hinge portion 7 is located between the extension portion 7C and a front edge portion 75A that forms the tip of the small lid portion 3 in the closed state. The shape of the extension portion 7C is not particularly limited, but in the example shown in Figure 1A, the shape of the extension portion 7C is determined so that the outer peripheral edge 7D of the extension portion 7C has a gently curved, convex mountain shape.

[0048] When the extension portion 7C is formed, marks, letters, etc. indicating the container 101 corresponding to the lid body 1 can be placed on the extension portion 7C. For example, letters such as S, M, and L can be placed on the extension portion 7C by printing, etc. Then, the types of container 101 and lid body 1 are associated with each other such that if the size of the container 101 is small, a lid body 1 with the letter S printed on it is used; if the size of the container 101 is medium, a lid body 1 with the letter M printed on it is used; and if the size of the container 101 is large, a lid body 1 with the letter L printed on it is used. This reduces the risk of joining the container 101 and the lid body 1 with an incorrect combination of different sizes when joining the lid body 1 to the container 101.

[0049] Furthermore, if an extension 7C is formed on the lid 1, the extension 7C can be used as a knob. As shown in the example of FIG. 1 , the hinge 7 is located between the front edge 75A forming the tip of the small lid 3 and the extension 7C by defining the extension 7C on the outer peripheral edge 2A of the base 2A1. This allows the front edge 75A of the small lid 3 and the extension 7C to be as far apart as possible. By defining the front edge 75A of the small lid 3 and the extension 7C as far apart as possible, even if a person carries the lid 1 by holding the extension 7C with their hand, the risk of the person holding the lid 1 touching the small lid 3 of the lid 1 is reduced, thereby reducing contamination of the small lid 3 due to contact with the person's hand.

[0050] [1-2 Actions and Effects] In conventional containers with lids that are attached to the rim of the container, when the lid is removed from the rim of the container, there is a risk that a person who holds a beverage and solids such as ice in the container may drink the beverage from the rim by placing their mouth on the rim of the top end of the container. As a result, there is a risk that the solids such as ice may spill out from the rim of the container when drinking the beverage, and the person drinking the beverage may accidentally ingest the solids.

[0051] The lid 1 according to the first embodiment is provided with a margin 10. Therefore, when a person holds a lidded container 150 to their mouth to drink a beverage, even if solid matter such as ice tends to flow out of the space 105 of the container 101, the liquid flows out through the small opening, but the margin 10 tends to restrict the flow of the solid matter, such as ice, and thus the risk of the person drinking the beverage accidentally ingesting the solid matter can be reduced.

[0052] Furthermore, in the lid 1 according to the first embodiment, the small opening 6 has a larger area than the margin portion 10, so that an additional beverage or the like can be poured through the small opening 6. Furthermore, after an additional beverage or the like has been poured, the small opening 6 can be reclosed with the small lid portion 3 by obtaining the same effect as the lids according to the seventh to ninth embodiments of the present invention described below. Furthermore, even when reclosing in this way, it is possible to ensure airtightness in the same way as the lids according to the embodiments described below.

[0053] The modified example of the first embodiment will be further described.

[0054] [1-3 Modifications] (Modification 1) In the lid 1 according to the first embodiment, a protruding portion 3F may be formed on the outer peripheral edge 3A of the small lid portion 3, as shown in Fig. 4. In this case, a recessed portion corresponding to the protruding portion 3F is formed on the opening edge 6G of the small opening 6. A lid 1 having such a configuration is referred to as Modification 1 of the first embodiment. Fig. 4 is a plan view schematically showing one example of the lid 1 according to Modification 1 of the first embodiment.

[0055] (Protruding Portion) In the example of FIG. 4 , the protruding portion 3F is a portion that extends convexly from the front edge 75A toward the outside of the small lid portion 3. The protruding portion 3F can be defined as a portion of the outer peripheral edge 3A of the small lid portion 3 in a plan view of the small lid portion 3, having a contour shape that protrudes outward compared to the outer peripheral edge 3A surrounding the portion corresponding to the protruding portion 3F. The opening edge 6G of the small opening 6 is formed with a recessed portion 3K that corresponds to the protruding portion 3F. In the example of FIG. 4 , the recessed portion 3K is formed with a shape that fits into the protruding portion 3F. This makes it easier for the base end of the protruding portion 3F to be engaged with the opening edge 6G of the small opening 6 when the small lid portion 3 is used to reclose the small opening 6, thereby stabilizing the state in which the small opening 6 is reclosed with the small lid portion 3.

[0056] (Variation 2) In the lid body 1 according to the first embodiment, a recessed portion 3I may be formed on the outer peripheral edge 3A of the small lid portion 3, as shown in Fig. 13. In this case, a convex portion 3J corresponding to the recessed portion 3I is formed on the opening edge 6G of the small opening 6. A lid body 1 having such a configuration is referred to as Variation 2 of the first embodiment. Fig. 13 is a plan view schematically showing one example of the lid body 1 according to Variation 2 of the first embodiment.

[0057] (Recessed Portion) The recessed portion 3I is a portion shaped by scooping out the small lid portion 3 in a direction toward the inside of the small lid portion 3 at a predetermined position from the front edge 75A slightly toward the base end 74A of the small lid portion 3. In the example of Figure 13, the recessed portion 3I is a portion shaped by scooping out the small lid portion 3 in a U-shape in a direction toward the inside of the small lid portion 3 at predetermined positions from the front edge 75A to each of the two side edges 76 slightly toward the base end 74A of the small lid portion 3.

[0058] (Convex portion) A convex portion 3J corresponding to the recessed portion 3I is formed on the opening edge 6G of the small opening 6. The convex portion 3J is formed in a shape that fits into the recessed portion 3I, and in the example of Fig. 13 is formed in a tongue shape. This makes it easier for the recessed portion 3I to be locked onto the convex portion 3J of the opening edge 6G of the small opening 6 or in its vicinity when the small opening 6 is reclosed with the small lid portion 3, making it easier to stabilize the state in which the small opening 6 is reclosed with the small lid portion 3.

[0059] (Variation 3) In the lid body 1 according to the first embodiment, a notch 8 may be provided in the base portion 2A1 as shown in Fig. 10. A lid body 1 having such a configuration is referred to as Variation 3 of the first embodiment. Fig. 10 is a plan view schematically showing one example of the lid body 1 according to Variation 3 of the first embodiment.

[0060] (Notch) In Modification 3 of the first embodiment, the notch 8 is formed in a cross shape. The notch 8 can be formed by vertically penetrating a member constituting the base of the lid body. In Modification 3 of the first embodiment, the notch 8 can be used as an insertion port for a straw or the like. Furthermore, as described below, in the case where the small lid 3 is provided with a claw 23B for holding the small opening 6 open, the notch 8 can be used as a through hole for inserting the claw 23B. In this case, the notch 8 also serves as a part of the holding structure forming portion 30 described below; that is, the claw 23B and the notch 8 constitute the holding structure forming portion 30. Note that the shape of the notch 8 is not limited to a cross shape, and various shapes such as a C-shape or a tongue-like shape may be used as long as it is a shape that can be used as an insertion port for a straw or the like.

[0061] (Variation 4) In the lid 1 according to the first embodiment, a recess 2B may be formed in the inner portion of the bonding region corresponding portion 5, as shown in Figures 15A and 15B. A lid 1 having such a configuration is referred to as Variation 4 of the first embodiment. Figure 15A is a plan view schematically showing one example of the lid 1 according to Variation 4 of the first embodiment. Figure 15B is a cross-sectional view schematically showing the state of the vertical cross section taken along line D-D in Figure 15A.

[0062] (Depressed portion) Depressed portion 2B can be formed by embossing a material (sometimes referred to as a blank) for forming lid 1. The area in which depressed portion 2B is formed is not particularly limited as long as it is a portion inside joint area corresponding portion 5, but preferably is a portion including small lid portion 3. Since the portion including small lid portion 3 is depressed portion 2B, even if liquid such as a beverage spills onto exposed surface 70 of lid 1, the liquid can be easily guided into depressed portion 2B, thereby reducing the risk of liquid spilling outside lid 1.

[0063] (Variation 5) In the lid 1 according to the first embodiment, as shown in FIG. 16A , the margin 10 may have an inclined portion 19 that slopes obliquely downward or obliquely upward from the outer edge 10D of the margin 10 toward the inner edge 10C of the margin 10. A lid 1 having such a configuration is referred to as Variation 5 of the first embodiment. FIG. 16A is a cross-sectional view schematically illustrating one example of the lid 1 according to Variation 5 of the first embodiment. FIG. 16A corresponds to a view showing a cross-section at a position similar to the cross-section corresponding to FIG. 15B . The same applies to FIG. 16B .

[0064] (Inclined Portion) The inclined portion 19 may be formed over the entire margin portion 10 or over a portion thereof. It is preferable that the inclination of the inclined portion 19 can be changed at the contact portion between the small cover portion 3 and the inner edge 10C of the margin portion 10 (the opening edge 6G of the small opening 6) when the small cover portion 3 is lifted from the closed state of the lid body 1 to the open state. For example, the inclined portion 19 may be formed on the margin portion 10 so that as the small cover portion 3 is lifted, the margin portion 10 also lifts slightly upward (in the +Z direction), changing the inclination of the inclined portion 19 from a diagonally downward inclined state to a diagonally upward inclined state or a horizontal state. This can be achieved by the small cover portion 3 and the small opening 6 contacting each other so that friction exists between the outer peripheral edge 3A of the small cover portion 3 and the inner edge 10C of the margin portion 10 (the opening edge 6G of the small opening 6) in the closed state.

[0065] In the fifth modification of the first embodiment, the inclined portion 19 is formed, so that the inner edge 10C of the margin portion 10 is more likely to bend in the vertical direction (Z-axis direction) around the outer edge 10D of the margin portion 10. Therefore, according to the fourth modification of the first embodiment, when a beverage or solid object is contained in the space of the container 150 with the small opening open (lid-open state), if a solid object hits the margin portion when a beverage or the like is consumed through the small opening, the margin portion is more likely to bend in the vertical direction, and the force applied to the margin portion by the solid object is more likely to be absorbed.

[0066] (Another example of inclined portion) The inclined portion 19 may be formed not only in the margin portion 10 but also on the entire inside of the bonding area corresponding portion 5 as shown in Fig. 16B. Fig. 16B is a cross-sectional view schematically showing another example of the lid body 1 according to the fifth modified example of the first embodiment. In this case, the inclined portion 19 is a portion that forms an inclined surface that slopes from the inner edge of the bonding area corresponding portion 5 toward the inside of the lid body 1.

[0067] (Variation 6) In the lid body 1 according to the first embodiment, the width W of the small lid portion 3 is not limited to gradually increasing from the front edge 75A toward the hinge portion 7 as shown in FIG. 1 and the like. As shown in FIG. 9B , the width W of the small lid portion 3 may gradually increase from the front edge 75A toward a predetermined position toward the hinge portion 7, and then gradually decrease from that predetermined position toward the hinge portion 7. A lid body 1 having such a configuration is referred to as Variation 6 of the first embodiment. FIG. 9B is a plan view schematically showing one example of the lid body 1 according to Variation 6 of the first embodiment. In the example of FIG. 9B , an inner edge 10C of the margin portion 10 and an outer edge 10D of the margin portion 10 are formed to be concentric.

[0068] (Variation 7) In the lid 1 according to the first embodiment, a stress adjustment portion 27 may be formed at the base end 74A of the small lid portion 3, as shown in Figures 19A and 19B. A lid 1 having such a configuration is referred to as Variation 7 of the first embodiment. Figures 19A and 19B are plan views schematically showing one example of the lid 1 according to Variation 7 of the first embodiment. In the example of Figure 19A, the stress adjustment portion 27 is a portion that is curved outward in a U-shape at the base end 74A of the small lid portion 3. In the example of Figure 19B, the stress adjustment portion 27 is a generally circular through-hole formed at the base end 74A of the small lid portion 3. The provision of the stress adjustment portion 27 prevents stress from being concentrated at one point on the base end 74A of the small cover portion 3 when the small cover portion 3 is rotated around the hinge portion 7 as an axis, thereby reducing the risk of the cover body 1 tearing from the base end 74A toward the base portion 2A1 and causing insufficient rotation of the small cover portion 3 around the hinge portion 7 as an axis. Note that when the stress adjustment portion 27 is formed, the base end 74A of the small cover portion 3 is considered to include the stress adjustment portion 27. Therefore, as shown in Figures 19A and 19B, the hinge portion 7 is formed at a position that generally corresponds to the straight line connecting the ends of the stress adjustment portion 27. Therefore, the small cover portion 3 and the margin portion 10 can be defined as the hatched areas in Figures 19A and 19B, respectively.

[0069] [2 Second Embodiment] [2-1 Configuration] The lid body 1 according to the second embodiment is the same as the first embodiment except that the small lid portion 3 is provided with a knob portion 24, as shown in Fig. 5 etc. A lid body 1 having such a configuration is referred to as the second embodiment. Fig. 5 is a plan view schematically showing one example of the lid body 1 according to the second embodiment.

[0070] The lid body 1 in the second embodiment may be the same as that in the first embodiment except for the configuration in which the knob portion 24 is provided on the small lid portion 3, and therefore explanations of other configurations (base portion 2A1, hinge portion 7, margin portion 10, etc.) other than the configuration in which the knob portion 24 is provided on the small lid portion 3 will be omitted.

[0071] (Knockoff portion) In the example of the second embodiment shown in Fig. 5, when the small opening 6 is closed by the small cover portion 3, a knob portion 24 is provided on the upper surface side, which is the exposed surface side (exposed surface 70 of the cover body 1) of the small cover portion 3. The structure of the knob portion 24 is not particularly limited as long as it allows the small cover portion 3 to be rotated around the hinge portion 7 as an axis, but in the example of Fig. 5, a tab member 31 is provided as the knob portion 24.

[0072] (Tab Member) In the example of FIG. 5 , when the small opening 6 is closed by the small lid portion 3, the tab member 31 has one end 31A joined to the small lid portion 3 and the other end 31B of the tab member 31 as a free end. The portion of the tab member 31 joined to the small lid portion 3 is called the tab joint portion 18. The portion of the tab member 31 on the free end side (the portion on the other end 31B side) of the tab member 31 excluding the tab joint portion 18 is not particularly limited in shape or structure as long as it is formed in a size and shape that allows the tab member 31 to be picked up by hand. The material of the tab member 31 may be the same as the material of the lid body 1 described in the first embodiment, and may be made of a paper-based material.

[0073] In the lid body 1, the attachment position and attachment direction of the tab member 31 on the small lid portion 3 are not particularly limited, but in the example of Figure 5, the tab member 31 is joined to the small lid portion 3 at a position near the tip of the small lid portion 3 (i.e., near the front edge portion 75A).

[0074] The method for joining the tab member 31 to the small flap portion 3 (i.e., the method for forming the tab joint 18) can be various methods such as ultrasonic joining, heat sealing, and joining with an adhesive. Of the above-mentioned methods for forming the tab joint 18, ultrasonic joining is preferred from the viewpoints of ease of joining and joining strength. The position at which the tab joint 18 is formed on the small flap portion 3 is preferably shifted from the center of the small flap portion 3 from the viewpoint of making it easy to stand up the small flap portion 3 (rotate the small flap portion 3) by lifting the tab member 31.

[0075] (Orientation of tab member (attachment direction)) In the example of Fig. 5 , the tab member 31 is disposed so that the other end 31B (free end) of the tab member 31 is closer to the hinge portion 7 than the one end 31A of the tab member 31. However, this is just one example, and the orientation of the tab member 31 may be in a direction other than the direction shown in the example of Fig. 5 . For example, the tab member 31 may be disposed so that the other end 31B of the tab member 31 is farther from the hinge portion 7 than the one end 31A of the tab member 31.

[0076] [2-2 Functions and Effects] The lid 1 according to the second embodiment can achieve the same effects as those of the first embodiment. In addition, the lid 1 according to the second embodiment is provided with the knob 24, which makes it possible to easily pull up the small lid portion 3.

[0077] A further description of the modified example of the second embodiment will now be given.

[0078] [2-3 Modifications] (Modification 1) When a tab member 31 is provided as the knob 24 in the lid 1 according to the second embodiment, a portion of the tab member 31 may intersect with the opening edge 6G of the small opening 6 in a plan view of the base portion 2A1 when the small lid portion 3 closes the small opening 6, as shown in Fig. 11 . A lid 1 having such a configuration is referred to as Modification 1 of the second embodiment. Fig. 11 is a plan view schematically showing one example of the lid 1 according to Modification 1 of the second embodiment.

[0079] 11 , the edge of one end (one end 31A) of the tab member 31 intersects with the opening edge 6G of the small opening 6, and the portion of the tab member 31 that overlaps the upper surface of the base portion 2A1 is referred to as the overlapping portion 35. If the overlapping portion 35 is formed, when the small opening 6 is opened with the small lid portion 3 and then the small opening 6 is closed again with the small lid portion 3, the overlapping portion 35 is pushed downward (in the −Z direction) into the small opening 6, so that the overlapping portion 35 is hooked onto the opening edge 6G of the small opening 6 below the small opening 6. This makes it possible to more stably close the small opening 6 again with the small lid portion 3.

[0080] In addition, from the viewpoint of enabling the overlapping portion 35 to more easily function to stabilize the state in which the small opening 6 is reclosed by the small lid portion 3 as described above, it is preferable that the small lid portion 3 has a protruding portion 3F, as described in Modification 1 of the first embodiment. In this case, as shown in FIG. 12 , when the small lid portion 3 has a protruding portion 3F, it is preferable that a portion of one end (one end 31A) of the tab member 31 extends outward from the protruding portion 3F, and that extended portion forms the overlapping portion 35. FIG. 12 is a plan view schematically showing an example of the lid body 1 according to Modification 1 of the second embodiment. In the case of the lid body 1 shown in the example of FIG. 12 , the overlapping portion 35 of the tab member 31 can be more reliably hooked to the lower side (opposing surface 73A side) of the opening edge 6G of the small opening 6, thereby more stabilizing the state in which the small opening 6 is reclosed by the small lid portion 3.

[0081] (Variation 2) The lid body 1 according to the second embodiment may have a holding structure forming portion 30, which is a portion that forms a holding structure that holds the small lid portion 3 in a state in which the small opening 6 is opened by rotating the small lid portion 3 relative to the base portion 2A1 around the hinge portion 7 as an axis, as shown in the example of Fig. 6. A lid body 1 having such a configuration is referred to as Variation 2 of the second embodiment. Fig. 6 is a plan view schematically showing one example of the lid body 1 according to Variation 2 of the second embodiment.

[0082] (Holding Structure Forming Portion) There are no particular limitations on the configuration of the holding structure forming portion 30. For example, in the example of the lid body 1 shown in FIG.

[0083] (Claw Portion) As shown in the example of Fig. 6, the claw portion 23B may be any portion having a structure that allows it to be latched onto a receiving portion 33 (described later) by hooking, inserting, or the like. In the example of Fig. 6, the claw portion 23B is provided on a tab member 31, which is an example of the knob portion 24. In this example, the claw portion 23B is formed by a notch formed in a predetermined position on the tab member 31 in a contour shape such as a mountain shape.

[0084] (Receiving Portion) The receiving portion 33 is formed in a shape that allows the claw portion 23B to be engaged or inserted. In the example of Fig. 6, the receiving portion 33 is a slit portion formed by cutting a predetermined position in the base portion 2A1. The receiving portion 33 is formed in a position that allows it to face the claw portion 23B when the tab member 31 is displaced to rotate the small cover portion 3.

[0085] (Formation of Retaining Structure) When raising the small lid portion 3 in the lid body 1, the knob portion is pulled up. At this time, the tab member 31 is pulled up and a predetermined portion of the free end side (the other end 31B side) of the tab member 31 is bent so that the claw portion 23B protrudes downward or upward. Then, the tab member 31 is displaced so as to rotate the small lid portion 3 until the claw portion 23B of the small lid portion 3 reaches a position facing the receiving portion 33 or a position close to that position. The claw portion 23B of the tab member 31 is then hooked or inserted into the receiving portion 33. This forms a retaining structure that holds the small lid portion 3 with the small opening 6 exposed.

[0086] In the above description, the holding structure forming portion 30 has a slit portion formed as the receiving portion 33, but the structure corresponding to the receiving portion 33 is not limited to a slit portion.

[0087] (Another example of the holding structure forming portion) When an extension portion 7C is provided on the base portion 2A1 of the lid body 1, the extension portion 7C may also function as a receiving portion, as shown in Fig. 7. Fig. 7 is a plan view schematically showing one example of the lid body 1 (another example of the holding structure forming portion) according to Variation 2 of the second embodiment.

[0088] 7, similarly to the example in Fig. 6, the claw portion 23B is formed on the knob portion 24 (tab member 31 in Fig. 7), and the claw portion 23B and the extension portion 7C form the holding structure forming portion 30. In the example in Fig. 7, the extension portion 7C is formed so that the outer peripheral edge 7D of the extension portion 7C can face the claw portion 23B when the tab member 31 is displaced to rotate the small cover portion 3.

[0089] (Formation of Retention Structure) In the lid body 1 shown in the example of FIG. 7 , similar to the example of FIG. 6 , when raising the small lid portion 3, the tab member 31 is pulled up in the direction of arrow F in FIG. 8A . FIG. 8A is a cross-sectional view schematically illustrating the state of the longitudinal section taken along line CC in FIG. 7 . In the example of FIG. 7 , similar to the example of FIG. 6 , the tab member 31 is pulled up and a predetermined portion of the free end side (the other end 31B side) of the tab member 31 is bent to form a shape in which the claw portion protrudes downward or upward. Then, the tab member 31 is displaced to rotate the small lid portion 3 until the claw portion 23B of the small lid portion 3 faces the outer peripheral edge 7D of the extension portion 7C or a position near that position. Then, as shown in FIG. 8B , the claw portion 23B of the small lid portion 3 is hooked or inserted into the extension portion 7C. This forms a retention structure that holds the small lid portion 3 with the small opening 6 as an exposed opening for the space portion 105. FIG. 8B is a cross-sectional view illustrating one embodiment of the retention structure.

[0090] As shown in Figure 66, instead of the tab member 31, a protruding piece may be formed from the small lid portion 3 to form a knob portion, and the small lid portion 3 may be opened and closed by operating this knob portion 24.

[0091] [3 Third Embodiment] The lid body 1 according to the third embodiment may be provided with multiple margin portions, as shown in FIGS. 14A and 14B . A lid body 1 having such a configuration is referred to as the third embodiment. FIG. 14A is a plan view schematically illustrating an example of the lid body 1 according to the third embodiment. FIG. 14B is a diagram for explaining the margin portion 10. The lid body 1 according to the third embodiment also includes a small lid portion 3, a base portion 2A1, and a hinge portion 7, similar to the first embodiment. The lid body 1 according to the third embodiment may be similar to the first embodiment except for the fact that multiple margin portions 10 are formed and that the small lid portion 3 and the small opening 6 are formed in different locations (positions). Therefore, a description of these other points will be omitted.

[0092] (Small lid portion 3 and portion where small opening is formed) In the third embodiment, the front edge 75A of the small lid portion 3 is formed in a position overlapping the joint area corresponding portion 5. Furthermore, the opening edge 6G of the small opening 6 corresponds to the outer peripheral edge 3A of the small lid portion 3, and therefore, similar to the small lid portion, a portion of the small opening 6 overlaps the joint area corresponding portion 5. For this reason, in the example of the third embodiment shown in Figure 14A, in the open state (a state in which the small lid portion 3 is rotated around the hinge portion 7 as an axis to expose the small opening), an opening portion (a portion that becomes an exposure opening) that exposes the space portion 105 of the container is formed by part of the edge portion 103 of the container 101 and the small opening.

[0093] (Margin) The margin 10 is defined in the same manner as in the first embodiment. Therefore, in the example of Fig. 14, the margin 10 is formed as a first margin 10A and a second margin 10B.

[0094] (Area of ​​First Margin and Second Margin, and Area of ​​Small Opening) The sizes of first margin 10A and second margin 10B are not particularly limited, but it is preferable that the sum of the areas of first margin 10A and second margin 10B in a plan view of base 2A1 be smaller than the area of ​​small opening 6 (which also corresponds to the area of ​​small lid 3 in the example of FIG. 14A ). That is, in the example of FIG. 14B , it is preferable that the sum of the area of ​​portion S11 corresponding to first margin 10A and portion S12 corresponding to second margin 10B be smaller than the area of ​​portion S2 corresponding to small opening 6 (the area of ​​small lid 3). In this case, since the size of the small opening 6 (the area of ​​portion S1) is larger than the size of the margin portion 10 (the sum of the areas of portions S11 and S12), when the container with lid 150 is in a state where the small opening 6 is open (open lid state), it becomes easy to add liquid such as a beverage or solid such as ice to the space portion 105 of the container 101.

[0095] [4 Application Example] The lid 1 according to the first embodiment can be used in a lidded container 150 as shown in Figures 3A and 3B. Figure 3A is a perspective view showing an example in which the lid 1 according to the first embodiment is joined to an edge 103 that forms the outer periphery of an opening 102 of a container 101 having an opening 102 formed at the top end. Figure 3B is a cross-sectional view that schematically shows the state of the vertical cross section taken along line B-B in Figure 3A. The explanation of the lidded container 150 will continue with reference to Figures 3A and 3B.

[0096] (Container with Lid) The container with lid 150 has a joint 151 where the container 101 and the lid 1 are joined, and the region of the lid 1 where the joint 151 is formed is the joint region R. The method for joining the lid 1 and the container 101 is not particularly limited, and any suitable joining method such as crimping or heat sealing can be used. The following description will be given taking as an example a case where the lid 1 according to the first embodiment is used in the container with lid 150.

[0097] In the example shown in FIGS. 3A and 3B , the container 101 has a container body 110 having a cylindrical sidewall 104 and a bottom 106 that increase in diameter upward (or taper downward), forming a space 105 therein, and an opening 102 that opens at the upper end of the container body 110 (the upper end of the sidewall 104). Although not shown, the opening 102 of the container 101 is circular. However, the container 101 shown here is merely an example and is not intended to limit the configuration of the container 101. For example, the opening 102 of the container 101 may be rectangular. The container 101 may be any container as long as the opening 102 can be covered with the lid 1. Furthermore, the substance stored inside the container 101 (space 105) is not particularly limited, and examples include liquid substances, solid substances, and combinations thereof.

[0098] 3, the edge 103 of the opening 102 has a flange portion. The flange portion may be a curled portion 109 formed by outwardly winding a member forming the container body 110 as shown in FIG. 3, or may be formed as a portion (a flange portion) extending outward on a plane.

[0099] The lid 1 according to the first embodiment may be combined with a container 101 having an opening 102 .

[0100] The above description of [4. Application Examples] is not limited to the case where the lid 1 according to the first embodiment is used. The second and third embodiments can also be used for a lidded container 150 joined to a container 101 in the same manner as the lid 1 according to the first embodiment (not shown).

[0101] Next, fourth to sixth embodiments of the lid according to the present invention will be described.

[0102] [1 Fourth Embodiment] [1-1 Configuration] (Lid) The lid 1 according to the fourth embodiment is used by being joined along the edge 103 of the opening 102 of the container 101. The lid 1 is formed in a shape that allows it to be attached to the edge 103 (joined to the edge 103) so as to cover the opening 102 when joined to the opening 102 of the container 101. As shown in FIG. 20 , the lid 1 has a joining region R that is joined to the edge 103 of the opening 102 of the container 101. FIG. 20 is a diagram showing one example of the lid 1. It is more preferable that the container 101 have a flexible edge 103. However, this does not prohibit the container 101 from being a container with little or no flexibility, such as a metal container.

[0103] As shown in Figures 20(a) and 20(b), the lid 1 includes a main body 2. In the lid 1, the main body 2 includes a bonding region R. Figures 20(a) and 20(b) are a plan view and a cross-sectional view, respectively, showing another embodiment of the lid 1.

[0104] (Bonding Region) The bonding region R indicates a portion of the surface of the lid 1 that faces the opening 102 of the container 101 and forms a region that is bonded to the edge 103 when the lid 1 is attached to the edge 103 above the opening 102. In the example of FIG. 20 , the bonding region R corresponds to a region that is formed in a generally annular shape along the opening 102 of the container 101 in a shape that corresponds to the opening 102 of the container 101 in a plan view of the lid 1. The width W (width along the inward / outward direction) of the bonding region R is typically the same as or narrower than the width of the edge 103 of the opening 102. However, this does not prohibit the width W of the bonding region R from being wider than the width of the edge 103 of the opening 102. Furthermore, the bonding region R may be formed inside the outer peripheral edge 2A of the main body 2, or may be formed up to the outer peripheral edge 2A of the main body 2. Note that the inside of the bonding region R refers to the portion of the lid 1 that forms the inside of the portion that forms the bonding region R in a plan view of the lid 1. The inside of the bonding region R is sometimes referred to as an inner region Rn. The term "above the bonding region R" refers to the upper surface side (exposed surface 70 side) of the portion of the lid 1 that corresponds to the bonding region R in a plan view of the lid 1.

[0105] (Main Body) The main body 2 covers the opening 102 and the edge 103 when the lid 1 is attached over the opening 102 of the container 101. The main body 2 includes a displacement-facilitating structure 5B.

[0106] (Displacement-Facilitating Structure) In the main body 2, the displacement-facilitating structure 5B is a structural portion configured to enable a portion of the main body 2 to be displaced relative to another portion of the main body 2 from an edge portion defined on the outer peripheral edge 2A of the main body 2 toward the inside of the main body 2. In this specification, the edge portion described above is referred to as the first edge portion (denoted by the reference symbol 71A in FIG. 20( a) and other figures), and the portion of the outer peripheral edge 2A excluding the first edge portion 71A is referred to as the second edge portion 71B. Furthermore, the portion of the main body 2 that can be displaced relative to the second portion 3D (the portion of the main body 2 described above) is defined as the first portion 3B, and the other portion of the main body 2 (the portion of the main body excluding the first portion) is defined as the second portion 3D. The displacement-facilitating structure 5B has a guide portion 6A.

[0107] (Guide Portion) The guide portion 6A has a portion extending from a first end 71A1 and a second end 71A2, which are both ends of the edge portion (first edge portion 71A), toward the inside of the main body 2. The guide portion 6A defines at least a portion of the boundary K1 between the first portion 3B and the second portion 3D. In the example of FIG. 20( a), a first guide portion 6B and a second guide portion 6C are formed as the guide portion 6A. In this example, the first guide portion 6B extends from the first end 71A1 toward the inside of the main body 2 and forms the boundary K1 between the first portion 3B and the second portion 3D. The second guide portion 6C extends from the second end 71A2 toward the inside of the main body 2 and forms the boundary K1 between the first portion 3B and the second portion 3D. Note that when the first guide portion 6B and the second guide portion 6C are not distinguished, they are collectively referred to as guide portion 6A.

[0108] The guide portion 6A crosses the bonding region R. In the example of FIG. 20( a), the guide portion 6A is formed linearly. The guide portion 6A is defined as a portion where a separation structure between the first portion 3B and the second portion 3D is formed along the boundary K1 between the first portion 3B and the second portion 3D when the first portion 3B is displaced relative to the second portion 3D. When the first portion 3B is displaced from an unused state of the container 101 attached to the lid 1, separation between the container 101 and the lid 1 occurs. Therefore, strong force is applied at the boundary between the first portion 3B and the second portion 3D in and near the bonding region R, which is likely to cause internal fracture of the lid 1. Internal fracture refers to intralaminar peeling within the material (e.g., paper-based material) that forms the lid 1, or fracture in an unintended portion (fracture other than the boundary K1). By forming a displacement facilitation structure 5B having such a guide portion 6A on the cover body 1, the risk of internal destruction occurring at the boundary between the first part 3B and the second part 3D in the joint region R and its vicinity can be reduced, and smooth displacement of the first part 3B can be achieved.

[0109] The structure of the guide portion 6A is not particularly limited, but in the example of Fig. 20(a), it has a notched structure as described above. However, this does not restrict the guide portion 6A from having a structure other than a notched structure. For example, the guide portion 6A may have a weakened structure.

[0110] In this specification, the term "slit structure" refers to a slit-like structure that penetrates the entire container 101 from the non-facing surface (exposed surface 70) facing the opening to the opposing surface (back surface) when the lid 1 is attached to the container 101. The term "weakened structure" refers to a structural portion, such as a perforated structure or half-cut structure, that requires less force to displace the lid 1 than a portion without the structure. The perforated structure, as shown in FIG. 26(a), is a structure in which cut portions 18B that penetrate from the exposed surface 70 to the back surface are alternately formed with continuous portions 18A that avoid the cuts. The half-cut structure, as shown in FIG. 26(c), refers to a structure (partially cut structure) in which partial cut portions 32 are formed by partially cutting the material forming the main body 2 while avoiding penetrating in the thickness direction. The half-cut structure does not have any particular limitations on the depth of the cuts in the material forming the main body 2. FIG. 26(a) is a plan view showing an example in which the guide portion 6A has a perforated structure, and FIG. 26(b) is a plan view showing an example in which the guide portion 6A has a half-cut structure.

[0111] 20( a) and other examples, the first guide portion 6B has a first outer guide portion 8A formed from the portion from the first end portion 71A1 to the inner edge RA of the joining region R, and a first inner guide portion 9A excluding the first outer guide portion 8A. The second guide portion 6C has a second outer guide portion 8B formed from the portion from the second end portion 71A2 to the inner edge RA of the joining region R, and a second inner guide portion 9B excluding the second outer guide portion 8B.

[0112] In the guide portion 6A, the first outer guide portion 8A and the first inner guide portion 9A may have different structures. For example, the first outer guide portion 8A may have a half-cut structure, and the first inner guide portion 9A may have a notched structure. The same applies to the second outer guide portion 8B and the second inner guide portion 9B.

[0113] In the displacement-facilitating structure 5B, the first guide portion 6B and the second guide portion 6C extend so as to approach each other toward the inside of the main body 2. This is one example, and as shown in Modification 1 of the fourth embodiment described later, at least one of the first guide portion 6B and the second guide portion 6C may be formed along the inner edge RA of the joint region R. However, from the viewpoint of making the shape of the first portion 3B tapered from the first edge portion 71A toward the inside of the main body 2 as described later, it is preferable that the first guide portion 6B and the second guide portion 6C extend so as to approach each other from the first end portion 71A1 and the second end portion 71A2, respectively, toward the inside of the main body 2.

[0114] Furthermore, for the first guide portion 6B and the second guide portion 6C, the length of the portion of the first guide portion 6B that overlaps the joint region R (first overlapping portion) may be different from the length of the portion of the second guide portion 6C that overlaps the joint region R (second overlapping portion).

[0115] In such a case, the length of the adhesive portion at the first overlapping portion can be made different from the length of the adhesive portion at the second overlapping portion. In this case, when displacing the first portion, the first outer guide portion 8A and the second outer guide portion 8B displace the first portion while releasing (separating) the adhesion between the container 101 and the lid 1, so the user can displace the first portion using a relatively large force. The first inner guide portion 9A and the second inner guide portion 9B do not require force to release the adhesion between the container 101 and the lid 1, so the user can displace the first portion using a relatively small force. Therefore, the force applied to the lid changes suddenly when the container moves from the first outer guide portion 8A to the first inner guide portion 9A and when the container moves from the second outer guide portion 8B to the second inner guide portion 9B. If the user continues to apply force to the first inner guide portion 9A or the second inner guide portion 9B, the lid will be subjected to an excessive load. Therefore, by making the length of the adhesive portion at the first overlapping portion different from the length of the adhesive portion at the second overlapping portion, it becomes easy to shift the timing of the transition from the first outer guide portion 8A to the first inner guide portion 9A and the timing of the transition from the second outer guide portion 8B to the second inner guide portion 9BN, making it less likely that more load than necessary will be placed on the lid body.

[0116] (Hinge Portion) As shown in the examples of FIGS. 20( a) and 20(b), the displacement-facilitating structure 5B preferably includes a hinge portion 7. The hinge portion 7 is connected to the inner end of the guide portion 6A. In the examples of FIGS. 20(a) and 20(b), the ends of the hinge portion 7 are connected to the inner ends of the first guide portion 6B and the second guide portion 6C. That is, the guide portion 6A is connected to the end of the hinge portion 7 at the end of the inner guide portion (first inner guide portion 9A, second inner guide portion 9B) opposite the connection end with the outer guide portion (first outer guide portion 8A, second outer guide portion 8B). The structure of the hinge portion 7 is not particularly limited as long as it is a notched structure, and it may be a non-forming structure or a weakened structure.

[0117] The hinge portion 7 allows the first portion 3B to smoothly move relative to the second portion 3D. For example, in the example shown in FIGS. 20( a) and 20(b), when the lid 1 is unused, the first portion 3B is joined to the container 101 in a region of the joining region R corresponding to the first portion 3B, thereby restricting the displacement of the first portion 3B. As shown in FIGS. 21(a) and 21(b), when the lid 1 is in use, the first portion 3B is raised relative to the second portion 3D from the outer peripheral edge of the first portion 3B (the outer end of the first edge portion 71A). At this time, the first portion 3B is peeled off from the edge portion 103 of the container 101. Then, the first portion 3B and the second portion 3D are separated generally along the guide portion 6A, and the first portion 3B gradually rises relative to the second portion 3D. The guide portion 6A defines the boundary between the first portion 3B and the second portion 3D.

[0118] When the separation between the first portion 3B and the second portion 3D reaches the inner end of the guide portion 6A, the hinge portion 7 is formed, allowing the first portion 3B to rotate more smoothly in the direction of arrow F relative to the second portion 3D, as shown in FIG. 21(b). The first portion 3B can then be smoothly folded back to a position facing the exposed surface 70 of the second portion, using the hinge portion 7 as an axis. Thus, the hinge portion 7 allows for smoother displacement of the first portion. It is preferable that the hinge portion 7 has a weakened structure to smoothly separate the first portion 3B and the second portion 3D. However, this is just one example, and the hinge portion 7 may be a non-formed portion. The non-formed portion refers to a portion where the cut structure and the weakened structure are omitted.

[0119] (First portion) The first portion 3B is defined as a portion that can be displaced by the displacement-facilitating structure 5B when the lid 1 is attached to the container 101. In addition, the first portion 3B is defined as a portion that forms a predetermined region (a predetermined portion defined in the inner region Rn) that extends from a part (first edge portion 71A) of the outer peripheral edge 2A of the main body 2 as a base end toward the inside of the main body 2 and toward the inside of the joining region R in a plan view of the lid 1.

[0120] (Shape of First Portion) The shape of the first portion 3B is determined according to the layout of the guide portion 6A of the displacement facilitation structure 5B. In the example of FIG. 20 , the first portion 3B has two side edges 77, a first side edge 77A and a second side edge 77B, and an inner edge 73 connected to the side edge 77 at the inner end of the side edge 77. The first edge 71A of the outer peripheral edge 2A of the main body 2, which corresponds to the first portion 3B, also serves as the front edge of the first portion 3B. In the first portion 3B, the first side edge 77A and the second side edge 77B extend in a direction from the front edge (first edge 71A) toward the inner edge 73 toward the inside of the main body 2 in directions that intersect with each other (approaching each other). The first side edge 77A is formed as the first portion 3B and the second portion 3D are separated by the first guide portion 6B. The second side edge 77B is formed as the first portion 3B and the second portion 3D separate at the second guide portion 6C.

[0121] The shape of the first part 3B is not particularly limited, but it is preferable that the first part 3B has a tapered shape from the base end (first edge portion 71A) of the first part 3B on the outer peripheral edge of the main body 2 toward the inside of the main body 2, as shown in Figure 20(a), etc.

[0122] Such a shape of the first part 3B can be realized, for example, by adopting a layout of the guide portion 6A in which the first guide portion 6B and the second guide portion 6C extend in intersecting directions toward the inside of the main body, as described above.

[0123] When the first portion 3B is formed in this shape, separation of the first portion 3B and the second portion 3D is likely to occur along the extension direction of the guide portion 6A when the first portion 3B is displaced relative to the second portion 3D. The separation of the first portion 3B and the second portion 3D forms the first side edge portion 77A and the second side edge portion 77B described above. The hinge portion 7 of the displacement-facilitating structure 5B forms a portion corresponding to the inner edge portion 73.

[0124] (Second Portion) In a plan view of the cover 1, the second portion 3D is defined as a portion of the main body 2 excluding the region formed by the first portion 3B, i.e., the portion of the main body 2 excluding the first portion 3B. In the example of FIG. 20 , the boundary K1 between at least a portion of the second portion 3D and at least a portion of the first portion 3B is separated by a guide portion 6A. In this example, the hinge portion 7, which will be described later, is a structural portion where the boundary K1 between the second portion 3D and the first portion 3B is continuous. Furthermore, as shown in FIG. 21( a), the portion of the second portion 3D corresponding to the boundary K1 between the second portion 3D and the first portion 3B has a concave outline shape that corresponds to part of the outline of the first portion 3B.

[0125] (Small Opening) When the first portion 3B is displaced as shown in FIG. 32 (in the example of FIG. 21( a) etc., when the first portion 3B is folded back around the hinge portion 7 as an axis), a small opening 6 having a smaller opening area than the opening 102 is formed between the lid 1 and the container 101 as shown in FIG. 31 . FIGS. 31 and 32 are diagrams illustrating a state in which the first portion 3B is displaced in a lid-equipped container 150 in which the lid 1 according to the fourth embodiment is attached to the container 101. This can be achieved by determining the size of the first portion 3B so that the small opening 6 can be formed. Furthermore, when the small opening 6 is formed, the opening 102 and the space 105 of the container 101 are exposed through the small opening 6. The small opening 6 is formed in a region surrounded by the edge 103 of the container 101, the portion forming the facing surface 3H of the second portion 3D, and the hinge portion 7 in a plan view of the lid 1. With such a lid body 1, when the lid body 1 is attached to the opening 102 of the container 101 into which a beverage has been poured into the space 105, the user can use the small opening 6 of the lid body 1 as a drinking spout to consume the beverage inside the container 101.

[0126] (Protrusion) The cover 1 according to the fourth embodiment preferably includes a protrusion 11. The protrusion 11 protrudes outward from a portion of the outer periphery 2A of the main body 2 corresponding to the first portion 3B. The protrusion 11 can function as a knob for lifting the first portion 3B when displacing the first portion 3B relative to the second portion 3D. For example, the first portion 3B is lifted along with the protrusion 11 by pinching and lifting the tip 11A or a portion nearby the tip 11A of the protrusion 11. The tip 11A refers to a predetermined portion including the tip of the protrusion 11. The boundary K2 between the protrusion 11 and the first portion 3B is located on a portion of the outer periphery 2A of the main body 2, and a weakened structure may be formed along the boundary K2. This weakened structure may be the same as the weakened structure described in the displacement-facilitating structure 5B.

[0127] The size of the protrusion 11 is not particularly limited, but in the examples of Figures 20(a) and 20(b), it is a part that extends outward from the entire first edge portion 71A of the first part 3B, and is formed in a crescent shape when viewed in a plane of the lid body 1.

[0128] In the lid body 1 according to the fourth embodiment shown in the example of Fig. 20(a), the protrusion 11 has a claw portion 23B on the inside of the protrusion 11, and the receiving portion 20 is formed on the second portion 3D. However, this is not limited to the case where the lid body 1 has the claw portion 23B and the receiving portion 20. At least one of the claw portion 23B and the receiving portion 20 may be omitted from the lid body 1.

[0129] (Claw Portion) In Modification 5, the claw portion 23B is formed by causing the claw forming portion 23C formed on the protruding portion 11 to hang down from the protruding portion 11. The claw forming portion 23C is formed with a notch structure. The claw forming portion 23C is formed in a convex shape from the tip portion 11A of the protruding portion 11 toward the main body 2. When a user pinches the tip portion 11A or a portion nearby of the protruding portion 11 and bends the claw forming portion 23C from the base end 24A of the claw forming portion 23C so that the tip portion 24B of the claw forming portion 23C faces downward, the claw forming portion 23C hangs down from the protruding portion 11. The hanging portion at this time becomes the claw portion 23B.

[0130] (Receiving portion) The receiving portion 20 has a shape that allows the claw portion 23B to be inserted. Specifically, in the example of FIG. 20( a), the receiving portion 20 has a notched structure formed in a shape that allows the claw portion 23B of the protruding portion 11 to be inserted therein. In Modification 5, as shown in FIG. 21( b), as the first portion 3B is folded back onto the upper surface side of the second portion 3D around the hinge portion 7 as an axis, the protruding portion 11 is displaced integrally with the first portion 3B. FIG. 21( a) is a plan view showing the state in which the first portion 3B is folded back onto the upper surface side of the second portion 3D (onto the exposed surface 70), and FIG. 21( b) is a vertical cross-sectional view taken along line B-B shown in FIG. 21( a).

[0131] At this time, the protrusion 11 is displaced to a position where the claw portion 23B can be inserted into the receiving portion 20. In other words, the relative positions of the claw portion 23B and the receiving portion 20 are such that when the first portion 3B is folded back onto the upper surface of the second portion 3D around the hinge portion 7 as an axis, the claw portion 23B and the receiving portion 20 face each other. When the claw portion 23B of the protrusion 11 is inserted into the receiving portion 20, the state in which the first portion 3B is folded back onto the upper surface of the second portion 3D can be stably maintained.

[0132] [1-2 Actions and Effects] The lid 1 according to the fourth embodiment includes a displacement facilitation structure 5B, which allows the first portion 3B to be smoothly displaced relative to the second portion 3D. At this time, internal destruction is less likely to occur at the boundary between the first portion 3B and the second portion 3D. Therefore, after the small opening 6 is formed by the displacement of the first portion 3B relative to the second portion 3D, the first portion 3B can easily close the small opening 6 again with as little gap as possible. The state in which the first portion 3B is at least partially separated from the second portion 3D and the small opening 6 is exposed is referred to as the open state. The state in which the small opening 6 is covered by the first portion 3B is referred to as the closed state. The state in which the lid returns to the closed state after the open state has been formed is referred to as the re-closed state.

[0133] In the past, when a liquid such as a beverage was contained inside a container with a lid, the user peeled back the film material forming the lid to expose the container's mouth in order to consume the contents. In this case, even if the user subsequently tried to cover the exposed mouth with the lid again (sometimes referred to as a re-lidded state), the state in which the lid covered the mouth was easily released. Furthermore, when the lid closed the mouth, a gap of a certain size was easily formed between the lid and the mouth. In such cases, the liquid was likely to leak through the gap between the lid and the mouth. In this regard, with the lid body 1 according to the present invention, the first part 3B and the second part 3D are easily separated along the guide portion 6A when the open state is formed, and therefore, as shown in Figure 28, the end face 72C of the side edge portion 77 of the first part 3B and the face of the second part facing the end face 72C (facing face 3H) are easily aligned, and in the re-closed state, the end face 72C of the side edge portion 77 of the first part 3B and the face of the second part facing the end face 72C (facing face 3H) are easily in contact with each other.

[0134] Figure 28 is an enlarged view of a key portion illustrating the contact state between the first portion 3B and the second portion 3D. If the lid 1 is formed of a paper-based material in the state shown in Figure 28, the fibers of the paper-based material are likely to be exposed at the surface 3H facing the end surface 72C, which is likely to cause friction between the surface 3H facing the end surface 72C. In this case, the risk of the first portion 3B and the second portion 3D easily separating from each other due to friction between them is reduced, and the small opening 6 can be more stably maintained in a re-closed state with the first portion 3B. However, in the lid 1, at least the guide portion 6A separates the first portion 3B from the second portion 3D when the lid is in the open state. Therefore, breathability can be ensured even when the lid is re-closed, and steam can pass through at least a portion of the boundary between the first portion 3B and the second portion 3D.

[0135] [1-3 Modifications] Next, modifications of the lid 1 according to the fourth embodiment will be described.

[0136] (Variation 1) In the example of the lid 1 according to the fourth embodiment, the first inner guide portion 9A and the second inner guide portion 9B extend in directions that intersect with each other toward the inside of the main body 2, but the layout of the first inner guide portion 9A and the second inner guide portion 9B is not particularly limited to the shape shown in Fig. 20. In the lid 1 according to the fourth embodiment, at least one of the first inner guide portion 9A and the second inner guide portion 9B may be formed to extend along the inner edge RA of the joining region R, as shown in Fig. 23(a) etc. (Variation 1).

[0137] Fig. 23(a) is a plan view showing one example of the lid 1 according to Modification 1 of the fourth embodiment. In the example of Fig. 23(a), both the first inner guide portion 9A and the second inner guide portion 9B are formed into a shape that follows the inner edge RA of the joint region R. In this case, the first portion 3B is formed inside the joint region R into a shape that has at least a portion of a contour shape that expands along the inner edge RA of the joint region R. The ends of the hinge portion 7 are connected to the ends of the first inner guide portion 9A and the second inner guide portion 9B (ends different from the ends connected to the first outer guide portion 8A and the second outer guide portion 8B).

[0138] (Variation 2) In the example of the lid 1 according to Variation 1 of the fourth embodiment, the first inner guide portion 9A and the second inner guide portion 9B are formed along the inner edge RA of the joining region R, and the hinge portion 7 is also formed, but as shown in Fig. 23(b) , the hinge portion 7 may be omitted (Variation 2). Fig. 23(b) is a plan view showing an example of the lid 1 according to Variation 2 of the fourth embodiment. In this example, the portion of the first portion 3B formed inside the joining region R is formed into a shape that follows the inner edge RA of the joining region R.

[0139] 23(b), the end 9A1 of the first inner guide portion 9A and the end 9B1 of the second inner guide portion 9B are connected. In this case, the first inner guide portion 9A and the second inner guide portion 9B of the guide portion 6A are formed along the inner edge RA of the joining region R, and the hinge portion 7 is omitted, making it easy to completely separate the first portion 3B from the second portion 3D along the boundary K1. In this case, the small opening 6 is formed in an area surrounded by a part of the edge portion 103 of the container 101 (the part of the edge portion 103 formed in the part exposed by the displacement of the first portion 3B) and the facing surface 3H (the inner end surface) of the second portion 3D.

[0140] (Variation 3) In the lid 1 according to the fourth embodiment, as shown in FIG. 27 , the displacement-facilitating structure 5B may have a protruding curved portion 14 formed on the guide portion 6A, which curves so as to protrude from the first portion 3B toward the second portion 3D (Variation 3). FIG. 27 is a plan view showing an example of a lid according to Variation 3 of the fourth embodiment. In the first portion 3B, a portion corresponding to the protruding curved portion 14 forms a convex portion 15. In the example shown in FIG. 27 , the convex portion 15 is formed in a portion of the first portion 3B formed inside the bonding region R. In this case, the second portion 3D forms a concave portion 15C corresponding to the contour of the convex portion 15.

[0141] According to the third modification, the length of the boundary K1 between the first portion 3B and the second portion 3D is increased, and the area of ​​the facing surface 3H between the end surface 72C of the first portion 3B and the second portion 3D can be increased. This makes it possible to more stably maintain the re-closed state in which the small opening 6 is re-closed by the first portion 3B.

[0142] (Modification 4) In the lid 1 according to the fourth embodiment, as shown in Fig. 22(b), when the receiving portion 20 is formed on the second portion 3D, the tip portion 11A of the protrusion 11 may be formed in a shape corresponding to the shape of the receiving portion 20. (Modification 4) Fig. 22(b) is a plan view showing one example of a lid according to Modification 4 of the fourth embodiment.

[0143] In Modification 4, the receiving portion 20 has a notch formed in a shape that allows the tip portion 11A of the protrusion 11 to be inserted therein. In Modification 4, as the first portion 3B is folded back toward the upper surface side (exposed surface 70 side) of the second portion 3D around the hinge portion 7 as an axis, the protrusion 11 is displaced integrally with the first portion 3B. At this time, the protrusion 11 is displaced to a position where the tip portion 11A thereof can be inserted into the receiving portion 20. Then, when the tip portion 11A of the protrusion 11 is inserted into the receiving portion 20, the state in which the first portion 3B is folded back toward the upper surface side of the second portion 3D can be stably maintained.

[0144] (Variation 5) In the lid 1 according to the fourth embodiment, as shown in Fig. 22(a), the first portion 3B may have a claw portion 23B on the inside of the first portion 3B, and the receiving portion 20 may be formed on the second portion 3D (Variation 5). Fig. 22(a) is a plan view showing one example of a lid according to Variation 5 of the fourth embodiment. The structure of the claw portion 23B and the receiving portion 20 and the relative positions of the claw portion 23B and the receiving portion 20 may be the same as in Variation 5. In this case, the same effect as in Variation 5 can be obtained.

[0145] (Variation 6) In the lid 1 according to the fourth embodiment, as shown in FIG. 25 , a protrusion 22 may be formed that protrudes outward from a portion of the outer periphery 2A of the main body 2 that corresponds to the second portion 3D (Variation 6). FIG. 25 is a diagram showing an example of a lid according to Variation 6 of the fourth embodiment. In this case, the protrusion 11 that protrudes from the portion of the outer periphery 2A of the main body 2 that corresponds to the first portion 3B is referred to as the first protrusion 11B. The protrusion 22 that protrudes from the portion of the outer periphery 2A of the main body 2 that corresponds to the second portion is referred to as the second protrusion 22A. The first protrusion 11B and the second protrusion 22A are preferably arranged such that the center CP of the main body 2 is located between the first protrusion 11B and the second protrusion 22A in a plan view of the lid 1. In this case, for example, a worker attaching the lid 1 to the container 101 can pinch the second protrusion 22A to attach the lid 1 to the container 101, and a user of the container 101 can pinch the first protrusion 11B to displace the first portion 3B relative to the second portion 3D. In other words, the possibility of contamination of the first protrusion 11B and its surroundings due to a person other than the user touching the first protrusion 11B is reduced.

[0146] (Variation 7) In the lid 1 according to Variation 7 of the fourth embodiment, the claw portion 23B may be formed on the first protrusion 11B, and the receiving portion 20 may be formed on the second protrusion 22A (not shown). The structure of the claw portion 23B and the receiving portion 20 and the relative positions of the claw portion 23B and the receiving portion 20 may be the same as in Variation 5. In this case, the same effect as in Variation 5 can be obtained.

[0147] (Variation 8) In the lid body 1 according to the fourth embodiment, as shown in FIGS. 24(a) and 24(b), a tab member 31 may be provided on the outer peripheral edge 75B of the protrusion 11 or the outer peripheral edge 2A of the main body 2 (Variation 8). FIGS. 24(a) and 24(b) are plan views showing an example of the lid body 1 according to Variation 8 of the fourth embodiment. In the lid body 1 shown in FIG. 24(a), multiple tab members 31 are provided on the outer peripheral edge 75B of the protrusion 11. In the lid body 1 shown in FIG. 24(b), multiple tab members 31 are provided on a portion (second edge portion 71B) of the outer peripheral edge 2A of the main body 2 that corresponds to the second portion 3D. FIGS. 24(a) and 24(b) are merely examples, and the number of tab members 31 is not limited to those shown in these figures. It is preferable that each tab member 31 has a printed portion on which decorative images such as predetermined characters or figures are printed. When a printed portion is formed, it is preferable that the printed portion be formed on both the exposed surface side and the back surface side of the tab member 31 (not shown).

[0148] (Modification 9) The lid 1 according to Modification 9 of the fourth embodiment may be configured so that the claw portion 23B is not engaged with the receiving portion 20 but is engaged with a predetermined location such as the edge 103 of the lid 1 or the container 101. By engaging the claw portion 23B in this manner, it is possible to maintain the small opening 6 in an open state or to maintain the small opening 6 in a closed state after opening. Note that the configuration that can maintain the small opening 6 in an open state or the small opening 6 in a closed state may be other than those described above.

[0149] [2 Fifth Embodiment] [2-1 Configuration] (Lid) As shown in Figures 33(a) and 33(b), in a plan view of the lid 1 according to the fifth embodiment, a groove 80 is formed in a region (inner region Rn of the bonded region R) on the non-forming surface (exposed surface 70) of the bonded region R of the main body 2 corresponding to the inside of the bonded region R. Figures 33(a) and 33(b) are diagrams showing an example of the lid 1 according to Modification 1 of the fifth embodiment. The lid 1 according to the fifth embodiment is similar to the fourth embodiment in other configurations (such as the displacement-facilitating structure 5b) that form the groove 80, and therefore description thereof will be omitted.

[0150] (Groove) In the lid 1 according to the fifth embodiment, the groove 80 is preferably formed in the inner region Rn of the bonding region R, extending along the inner edge RA of the bonding region R. The depth of the groove 80 is not particularly limited, but is preferably configured to gradually deepen from a position far from the first portion 3B toward the first portion 3B along the extension direction of the groove 80, as shown in FIGS. 34(a), 34(b), and 34(c). As also shown in FIGS. 34(b) and 34(c), the depth D2 of the groove 80 at a position far from the first portion 3B is shallower than the depth D1 of the groove 80 at a position close to the first portion 3B along the extension direction of the groove 80. Furthermore, the groove 80 is preferably formed in both the first portion 3B and the second portion 3D, as shown in the examples of FIGS. 33(a) and 34(a). In this example, the groove 80 extends so as to intersect the boundary K1 between the first portion 3B and the second portion 3D. This can be achieved by forming the groove 80 so as to intersect with the guide portion 6A as well. In the example of Fig. 33(a), the groove 80 is formed so as to cross the first portion 3B. In this example, the groove 80 is formed in the first portion 3B so as to extend in a curved shape along the inner edge RA.

[0151] In this example, the groove 80 is formed in a C-shape along the inner edge RA of the bonding region R. However, this is just one example of the overall shape of the groove 80, and the shape of the groove 80 is not particularly limited. The groove 80 may be formed in a ring shape, for example, as shown in FIG. 35 . Even when the groove 80 is formed, the guide portion 6A may have a notched structure or a fragile structure such as a half-cut structure. However, when the guide portion 6A has a half-cut structure, even if the groove 80 is deepened and formed across the guide portion 6A (across the boundary K1 between the first portion 3B and the second portion 3D), a gap is less likely to occur at the intersection of the guide portion 6A and the groove 80.

[0152] (Convex Strip Portion) As shown in FIG. 33(b), the lid 1 preferably has a convex strip portion 82 at a position corresponding to the formation position of the groove 80 and on the opposite side from the formation surface of the groove 80 (exposed surface 70). In this case, as shown in FIG. 39, the convex strip portion 82 is preferably formed in a position that contacts the inner surface side of the edge 103 of the opening 102 of the container 101. Furthermore, the height of the convex strip portion 82 is preferably ensured to be high enough to prevent the exposed surface 70 of the lid 1 from misaligning in the planar direction with the edge 103 of the opening 102 of the container 101. Such a convex strip portion 82 can be realized by embossing the lid 1. By embossing, a groove 80 is formed on the exposed surface 70 side of the lid 1, and a convex strip portion 82 of a height corresponding to the depth of the groove 80 is formed on the opposite side corresponding to the formation position of the groove 80. By forming the groove 80 along the inside of the edge 103 of the opening 102 of the container 101, the convex rib portion 82 can be formed so as to run along the inner edge of the edge 103 of the opening 102 of the container 101 and to contact the inner surface of the edge 103 of the opening 102 of the container 101, as shown in Figure 39. Figure 39 is a cross-sectional view showing an example in which the lid 1 is placed on the container 101.

[0153] By forming such a convex rib portion 82, it becomes easier to align the lid body 1 with the container 101 when placing the lid body 1 so as to cover the opening 102 of the container 101.

[0154] [2-2 Actions and Effects] According to the lid 1 of the second embodiment, when the lid 1 is joined to the opening 102 of the container 101 containing a liquid, even if liquid leaks from inside the container 101 onto the exposed surface 70 of the lid 1, the liquid can flow down into the groove 80 before spilling outside the lid 1. Furthermore, if the groove 80 is formed to deepen toward the first portion, the liquid that flows into the groove 80 can be made to flow down toward the position of the first portion. Then, by lifting the first portion to expose the small opening 6, the liquid can drip from the small opening 6 into the container. Note that, as in the fourth embodiment, as shown in FIG. 38 , in the fifth embodiment, the small opening 6 is formed when the first portion 3B is displaced, and is formed, for example, in a portion surrounded by the hinge portion 7, the portion corresponding to the facing surface 3H of the second portion, and the edge portion 3G.

[0155] 40, when the first part 3B is pressed against the edge 103 of the container 101 to form the re-closed state, the first part 3B is slightly deflected at the position of the groove 80, and the recovery force from this deflection allows the first part 3B to press firmly against the edge 103 of the container 101, thereby strengthening the contact between the first part 3B and the edge 103. This allows the first part 3B to more securely close the small opening 6.

[0156] [2-3 Modifications] Modifications of the fifth embodiment will be described.

[0157] (Variation 1) In the lid according to the fifth embodiment shown in Fig. 36 , the number of grooves 80 may be multiple. Furthermore, as for the layout of the grooves 80, as shown in Fig. 36 , multiple grooves 80 may be formed concentrically. Fig. 36 is a plan view of the lid 1 according to Variation 1 of the fifth embodiment. When multiple grooves 80 are formed as shown in Variation 1 of the fifth embodiment, one type of lid 1 can be used to cover the openings 102 of multiple types of containers 101 having openings 102 with different diameters.

[0158] (Variation 2) In the lid according to the fifth embodiment, when the groove 80 is formed in an annular shape, the main body 2 may be formed such that, in a plan view of the lid 1, a portion of the main body 2 corresponding to an inner region of the groove 80 (inner region 90) is positioned higher than a portion of the main body 2 corresponding to an outer region of the groove 80 (outer region 91), as shown in Fig. 37 . Fig. 37 is a cross-sectional view showing an example of the lid 1 according to Variation 2 of the fifth embodiment. With the lid 1 according to Variation 2 of the fifth embodiment, when the lid 1 is attached to a container 101 containing a liquid, even if the liquid leaks onto the inner region 90 of the exposed surface 70 of the lid 1, the liquid can easily flow from the inner region 90 into the groove 80 on the exposed surface 70 of the lid 1.

[0159] [3 Sixth Embodiment] [3-1 Configuration] (Lid) In the lid 1 according to the third embodiment, as shown in Fig. 41 , a recessed portion 85 may be formed in the second portion 3D on the inside of the bonding region R (inner region Rn), where a predetermined region of the non-forming surface (exposed surface 70) of the bonding region R is recessed. Fig. 41 is a diagram showing one example of the lid 1 according to the third embodiment. The lid 1 according to the sixth embodiment is similar to the fourth embodiment in other configurations (such as the displacement-facilitating structure 5B) that form the recessed portion 85, and therefore description thereof will be omitted.

[0160] (Recessed portion) The recessed portion 85 is formed in the second portion 3D in a region from the inner edge RA of the joining region R to a predetermined position toward the center of the main body 2. In the example of Fig. 41 , when the position of the inner edge RA of the joining region R farthest from the portion corresponding to the first portion 3B is set as the reference position STP, the bottom surface 87 of the recessed portion 85 has an inclined surface that slopes downward from the reference position STP toward the first portion 3B. However, this does not prohibit the bottom surface 87 of the recessed portion 85 from being flat.

[0161] (Prominent Portion) In the lid 1, it is preferable that the prominence 86 is formed on the side opposite to the surface (exposed surface 70) on which the recess 85 is formed. In this case, it is preferable that the outer peripheral edge of the prominence 86 is formed so as to contact the inner surface of the edge 103 of the opening 102 of the container 101. Furthermore, it is preferable that the height of the prominence 86 is ensured to be high enough to prevent misalignment with the opening 102 of the container 101. Such a prominence 86 can be realized by embossing the lid 1. By embossing, the recess 85 is formed on the exposed surface 70 side of the lid 1, and the prominence 86 having a height corresponding to the depth of the recess 85 is formed on the opposite side corresponding to the position where the recess 85 is formed. Then, the recess 85 is formed so that the contour shape of the recess 85 follows the shape of the opening 102 of the container 101, and the prominence 86 can be formed so as to contact the inner surface of the edge 103 of the opening 102 of the container 101.

[0162] [3-2 Actions and Effects] According to the lid body 1 of the third embodiment, when the lid body 1 is joined to the opening 102 of the container 101 containing a liquid, even if the liquid leaks from inside the container 101 onto the exposed surface 70 of the lid body 1, it is possible to make the liquid flow down into the recessed portion 85 before spilling outside the lid body 1.

[0163] [3-3 Modifications] Modifications of the sixth embodiment will be described.

[0164] (Modification) According to the lid body 1 of the sixth embodiment, as shown in Fig. 42 , the recessed portion 85 may be formed over the entire body 2. Fig. 42 is a diagram showing one example of the lid body 1 of the modification of the sixth embodiment. In the lid body 1 of the modification of the sixth embodiment, the recessed portion 85 has a cone-like shape that sinks from the outer peripheral edge 2A of the body 2 toward the center of the body 2. According to the lid body 1 of the modification of the sixth embodiment, when the lid body 1 is joined to the opening 102 of a container 101 containing a liquid, even if the liquid leaks to any position on the exposed surface 70 of the lid body 1, the liquid can flow down into the recessed portion 85 before spilling outside the lid body 1.

[0165] [4 Application Example] The lid 1 according to the fourth embodiment can be used in a lidded container 150, as shown in Figures 29 and 30. Figures 29 and 30 are a perspective view and a cross-sectional view, respectively, showing an example in which the lid 1 according to the fourth embodiment is joined to the edge 103 of the opening 102 of a container 101 having an opening 102. The lidded container 150 has a joint 151 where the container 101 and the lid 1 are joined, and the region of the lid 1 forming the joint 151 is the joint region R. The method for joining the lid 1 and the container 101 is not particularly limited, and joining methods such as crimping and heat fusion (heat sealing) can be used as appropriate. Below, an example in which the lid 1 according to the fourth embodiment is used in a lidded container 150 will be described.

[0166] The container 101 has a main body having a cylindrical side wall 104 and a bottom surface 106 whose diameter increases in the upward direction, forming a space 105 therein, and an opening 102 that opens at the upper end of the main body (the upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is only an example and is not intended to limit the configuration of the container 101. For example, the container may have a rectangular opening. The container may be any container as long as the opening can be covered with a lid. Furthermore, the substance stored inside the container is not particularly limited, and examples include liquid substances, solid substances, and combinations thereof.

[0167] 29 and 30 , a curled portion 109 is formed by outwardly winding the member forming the body of the container at the edge 103 of the opening 102, but the container 101 is not limited to this. The end face of the side wall 104 may be exposed at the edge 103 of the opening 102, or a flange extending outward from the opening 102 of the container 101 may be formed at the edge 103 of the opening 102.

[0168] The lid according to the fourth embodiment may be combined with a container having a mouth.

[0169] The above description of [4. Application Example] is not limited to the case where the lid body 1 according to the fourth embodiment is used, but also applies to the fifth and sixth embodiments.

[0170] Seventh to ninth embodiments of the lid according to the present invention will be described in detail with reference to the drawings.

[0171] [1 Seventh Embodiment] [1-1 Configuration] (Lid) As will be described later using Figure 44 etc., the lid 1 according to the seventh embodiment is used by being joined along an edge 103 which is specified as a portion extending outward from the edge of an opening 102 of a container 101. Therefore, the lid 1 is formed so as to be able to form a joining region R that is joined to the edge 103 of the container 101 having the opening 102. Furthermore, the lid 1 is formed in a shape that allows it to be attached to the edge 103 (joined to the edge 103) so as to cover the opening 102 when joined to the opening 102 of the container 101.

[0172] As shown in Fig. 43, the lid 1 has a joining region R that is joined to an edge 103 formed on the upper end side of the opening 102 of the container 101. Fig. 43 is a diagram showing one embodiment of the lid 1. It is more preferable to use a container 101 that has flexibility at the edge of the opening 102. However, this does not prohibit the container 101 from being a container that has little or no flexibility, such as a metal container.

[0173] As shown in Figures 43A, 43B, etc., the lid 1 includes a main body 2. In the lid 1, the main body 2 includes a bonding region R. Figures 43A and 43B are a plan view and a cross-sectional view, respectively, showing another embodiment of the lid 1.

[0174] (Bonding Region) The bonding region R indicates a region of the surface of the lid 1 facing the opening 102 that is bonded to the edge 103 when the lid 1 is attached to the edge 103, which is specified as the portion extending outward from the edge 102A formed at the upper end of the opening 102 of the container 101. In the lid 1, the portion of the main body 2 that forms the bonding region R is referred to as the bonding region corresponding portion 5. In the example of FIGS. 43A and 43B , the bonding region R corresponds to a region that is formed in a generally annular shape along the opening 102 of the container 101 and that conforms to the shape of the opening 102. In this case, the bonding region corresponding portion 5 is defined as an annular portion that includes the bonding region R. When the bonding region R between the lid 1 and the container 101 is not continuously bonded, the portion sandwiched between adjacent bonding regions R is also included in the bonding region corresponding portion 5.

[0175] The width of the bonding region R (the width along the inward / outward direction) (i.e., the width of the portion 5 corresponding to the bonding region) is usually the same as or narrower than the width of the edge 103 of the opening 102. However, this does not prohibit the width of the bonding region R from being wider than the width of the edge 103 of the opening 102. Furthermore, the bonding region R may be formed inside the outer circumferential edge 2A of the main body 2, or may be formed up to the outer circumferential edge 2A of the main body 2.

[0176] In the example of FIG. 43 , the inner edge of the bonding region R (i.e., the inner edge 5C of the bonding region corresponding portion 5) is located slightly outside the edge of the opening 102 in a plan view of the lid 1 (i.e., in a plan view of the main body 2). However, this is merely an example, and the inner edge may be located significantly outside of the edge 102A of the opening 102, directly above the edge 102A of the opening 102, or further inward than the edge 102A of the opening 102. Note that in FIGS. 43A and 43B , the plan view of the lid 1 refers to the case where the lid 1 is viewed from the +Z side toward the −Z side along the Z-axis. The plan view of the main body 2 is also defined as the case where the main body 2 is viewed from the +Z side toward the −Z side, similar to the plan view of the lid 1.

[0177] In addition, in a plan view of the lid 1, the area of ​​the main body 2 inside the bonding area R is sometimes referred to as an inner area Rn. Furthermore, "above the bonding area R" refers to the upper surface side (exposed surface 70 side) of the part of the lid 1 that corresponds to the bonding area R in a plan view of the lid 1.

[0178] 43A , the main body 2 covers the opening 102 and the edge 103 when the lid 1 is attached over the opening 102 of the container 101. The main body 2 has a portion corresponding to the joining region R (jointing region corresponding portion 5), and has an outer portion 72 including the joining region R, and an inner portion 72D formed from the portion inward from the inner edge 72A of the outer portion 72. Regarding the inward / outward directions, the direction from the center CT of the main body 2 toward the outside is defined as the outward direction, and the direction from the outer peripheral edge 2A of the main body 2 toward the center CT is defined as the inward direction.

[0179] (Outer Portion) In a plan view of the lid 1 , the portion of the main body 2 that is outward from the inner edge of the joining region R (i.e., the inner edge 5C of the portion 5 corresponding to the joining region) is referred to as an outer portion 72 .

[0180] (Inner portion) In a plan view of the lid 1, the inside of the bonding region R (i.e., the inside of the portion corresponding to the bonding region 5) refers to a portion of the lid 1 that forms the inside of the portion that forms the bonding region R. This portion is referred to as the inner portion 72D.

[0181] (First Part and Second Part) The main body 2 includes a first part 3C and a second part 3E. In the example of Fig. 43, a boundary part 5A formed at the boundary between the first part 3C and the second part 3E includes a guide part 6A and a hinge part 7. The combination of the guide part 6A and the hinge part 7 can form a displacement facilitation structure that facilitates rotation of the first part 3C.

[0182] (First Portion) The first portion 3C is a portion of the main body 2 that is defined as a portion that rotates upward to expose the opening 102 when the main body 2 is joined to the edge 103 of the container 101. Here, the rotation of the first portion 3C refers to the displacement of the first portion 3C so as to rotate around the hinge portion 7 (described later) as an axis. When the first portion 3C rotates, the shape of the first portion 3C may be deformed. The upward rotation of the first portion 3C can be achieved, for example, by lifting the first portion 3C. The shape of the first portion 3C is not particularly limited, but in the example shown in FIG. 43A and other figures, the first portion 3C is formed in a roughly semicircular shape in a plan view of the lid 1. In this example, the first portion 3C is formed on the inner portion 72D (i.e., inside the joining area corresponding portion 5).

[0183] (Second Part) The second part 3E indicates the part of the main body 2 excluding the first part 3C.

[0184] (Boundary) In the main body 2, the boundary 5A indicates a portion defined as a boundary between the first portion 3C and the second portion 3E in a non-rotating state. The non-rotating state indicates a state of the main body 2 in which rotation of the first portion 3C relative to the second portion 3E is restricted. For example, the non-rotating state is a state in which the first portion 3C is not rotated when the lid 1 is not in use.

[0185] (Guide Portion and Hinge Portion) The boundary portion 5A has a guide portion 6A and a hinge portion 7.

[0186] The hinge portion 7 is determined as a portion that serves as a rotation axis of the first portion 3C when the upward displacement state is formed. The upward displacement state is specified as a state of the main body 2 in which the first portion 3C is rotated upward relative to the second portion 3E (in the example of FIG. 43B , the direction that causes displacement on the +Z side, the +F direction).

[0187] Note that rotating the first part 3C upward includes not only rotating the first part 3C in a direction along the surface direction of a plane that intersects perpendicularly with the horizontal plane (which in the example of Figure 43A corresponds to the upper surface (exposed surface 70) of the main body 2 and corresponds to the XY plane stretched by the X axis and the Y axis), but also rotating the first part 3C in a direction along the surface direction of a plane that intersects diagonally with the horizontal plane.

[0188] The guide portion 6A defines a position where separation between the first portion 3C and the second portion 3E is intended to occur when the upward displacement state is formed. The guide portion 6A is defined as a portion that defines a position where separation between the first portion 3C and the second portion 3E is intended to occur when the upward displacement state is formed.

[0189] 43A and 43B , guide portion 6A is specified as a portion of boundary portion 5A that extends in a direction away from hinge portion 7, with the ends (one end 7A and the other end 7B) of hinge portion 7 as its base end. In this example, one end 6D of guide portion 6A is connected to one end 7A of hinge portion 7, and the other end 6E of guide portion 6A is connected to the other end 7B of hinge portion 7.

[0190] Furthermore, guide portion 6A is formed in a convex shape in a direction away from hinge portion 7, has a front end portion 6F, and extends linearly (curvedly). However, this is just one example, and the shape of guide portion 6A is not limited to a convex shape, and guide portion 6A may be formed in a shape other than the linear (curved) shape shown in FIG.

[0191] 43A , the guide portion 6A is formed inside the joint region R, i.e., on the inner portion 72D. When the first portion 3C is rotated relative to the second portion 3E, the guide portion 6A can be the portion where a separation structure between the first portion 3C and the second portion 3E is formed.

[0192] 43A , the guide portion 6A is formed so as to be positioned generally along and slightly inward from directly above (the +Z direction side of) the edge 102A of the opening 102 of the container 101 when the lid 1 is joined to the container 101. However, this is just one example, and at least a portion of the guide portion 6A may be positioned directly above the edge 102A of the opening 102, or may not be along the edge 102A. The guide portion 6A may be positioned significantly further inward than the edge 102A of the opening 102 in a plan view of the lid 1. However, from the viewpoint of making it easier for the first portion 3C to come into contact with the inner circumferential surface 104A of the container 101 when the first portion 3C is rotated downward to form a downward displacement state, the guide portion 6A is preferably positioned directly above the edge 102A of the opening 102 or outward from the edge 102A.

[0193] The structure of the guide portion 6A is not particularly limited, but is a weakened structure as described above. However, this does not restrict the guide portion 6A from having a structure other than a notched structure. For example, the guide portion 6A may have a notched structure.

[0194] In this specification, the cut structure refers to a slit-like penetration structure that penetrates the entire container from the non-facing surface (exposed surface 70) side of the opening 102 to the facing surface (rear surface) when the lid 1 is attached to the container 101. The weakened structure refers to a structural portion that requires less force to displace the opening 102 than a portion that does not have the structure, such as a perforated structure or a half-cut structure.

[0195] The perforated structure is a structure in which cuts that penetrate from the exposed surface 70 to the back surface and continuous portions that avoid the cuts are alternately formed. The half-cut structure is a structure (partial cut structure) in which partial cuts are formed that are partially cut while avoiding penetrating in the thickness direction of the material that forms the main body 2. Note that the half-cut structure does not particularly limit the depth of the cuts in the material that forms the main body 2.

[0196] The guide portion 6A may have a different structure in some parts. For example, the guide portion 6A may have a half-cut structure near the front end 6F and a notched structure in other parts. When the guide portion 6A near the front end 6F is located in the joint area corresponding portion 5, even if the entire guide portion 6A has a notched structure, the joint structure (joint 151) between the container 101 and the lid 1 prevents the first portion 3C from opening unintentionally.

[0197] (Hinge Portion) As shown in the examples of Figures 43A and 43B, the boundary portion 5A has a hinge portion 7. In this example, ends 7A and 7B of the hinge portion 7 are connected to ends 6D and 6E of the guide portion 6A, respectively. The structure of the hinge portion 7 is not particularly limited as long as it is not a cut structure, and it may be a non-formed structure or a weakened structure. The non-formed structure refers to a portion in which the cut structure and the weakened structure are omitted. In other words, the non-formed structure here refers to a portion in which the main body 2 is configured so that the hinge portion 7 becomes apparent when the first portion 3C is rotated upward or downward.

[0198] When the lid 1 is in use, the first portion 3C is raised relative to the second portion 3E. At this time, the first portion 3C and the second portion 3E separate generally along the guide portion 6A, and the first portion 3C gradually rises while rotating relative to the second portion 3E around the hinge portion 7 as an axis. From the viewpoint of smoothly forming the separation portion between the first portion 3C and the second portion 3E, it is preferable that the hinge portion 7 has a weakened structure. However, this is just one example, and as described above, the hinge portion 7 may have no structure.

[0199] 43A, the hinge 7 is formed inside the joining region R, that is, in the inner portion 72D. However, this is just one example, and at least one end (7A, 7B) of the hinge 7 may be formed directly above the joining region R in a plan view of the lid 1, or may be formed outside the joining region R.

[0200] 43A , the ends 7A and 7B of the hinge portion 7 are formed so that they are positioned slightly inward from directly above the edge 102A of the opening 102 of the container 101 when the lid 1 is joined to the container 101. However, this is just one example, and at least one end (7A, 7B) of the hinge portion 7 may be formed directly above the edge 102A of the opening 102, or may be formed at a position outside of directly above the edge 102A. From the viewpoint of making it easier for the first portion 3C to come into contact with the inner circumferential surface 104A of the container 101 when the first portion 3C is rotated downward to form a downward displacement state, the ends 7A and 7B of the hinge portion 7 are preferably positioned directly above the edge 102A of the opening 102 or outside the edge 102A in a plan view of the lid 1.

[0201] 44 , when first portion 3C is displaced (upwardly displaced state), exposed opening 6H is formed, exposing space 105 from opening 102. When lid 1 is attached to opening 102 of container 101 in which liquid such as beverage or miso soup has been poured into space 105, a user can use exposed opening 6H of lid 1 as a drinking spout to ingest the liquid inside container 101.

[0202] (Downward Displacement State) The main body 2 is configured to be able to assume a downward displacement state, as shown in Figures 43B and 44. Here, the downward displacement state is defined as a state of the main body 2 in which the first portion 3C is pressed downward (in the example of Figure 43B, the direction that displaces the first portion 3C to the -Z side, the -F direction) with the hinge portion 7 as the rotation axis relative to the second portion 3E (a state in which the first portion 3C is rotated downward). Rotating the first portion 3C downward includes not only rotating the first portion 3C in the direction of a plane that intersects perpendicularly with the horizontal plane (in the example of Figure 43A, this also corresponds to the upper surface (exposed surface 70) of the main body 2, which corresponds to the XY plane), but also rotating the first portion 3C in the direction of a plane that intersects obliquely with the horizontal plane. In the examples of Figures 43B and 44, when rotating the first portion 3C downward, the first portion 3C rotates in the -F direction with the hinge portion 7 as the rotation axis.

[0203] When the first portion 3C of the main body 2 is rotated to an upward displacement state and then pushed downward so that the first portion 3C again blocks the exposure opening 6H, the first portion 3C is returned to a position corresponding to the non-rotated state. Furthermore, by pushing the first portion 3C downward, the first portion 3C is defined as being pushed further downward than the second portion 3E, with the hinge portion 7 as the pivot axis. In particular, when the entire lid 1 is structured using a paper-based material, the main body 2 also uses a paper-based material, and therefore a state in which the first portion 3C is bent can be created, and a state in which the first portion 3C is pushed further downward than the second portion 3E can be created with the first portion 3C bent downward.

[0204] In addition, when a tab member 31 (described later) is provided on the first portion 3C, the portion of the first portion 3C to which the tab member 31 is joined (tab joint 18 (described later)) is stiffer than other portions of the first portion 3C (portions other than tab joint 18). In this way, when the tab member 31 is provided on the first portion 3C, a difference in stiffness can be imparted to the first portion 3C, which makes it particularly efficient to form a state in which the first portion 3C has a downward deflection such that the vicinity of the tab joint 18 to which the tab member 31 is joined protrudes downward. Therefore, when a downward displacement state is formed with the lid 1 joined to the container 101, the recovery force of the first portion 3C from the deflection allows the first portion 3C to more strongly contact the inner circumferential surface 104A of the container 101.

[0205] (Tab Member) As shown in the examples of Figures 43A and 43B, the cover 1 preferably has a tab member 31 attached to the first portion 3C. The attachment position and attachment direction of the tab member 31 on the first portion 3C are not particularly limited. However, in the examples of Figures 43A and 43B, the tab member 31 is joined to the first portion 3C at a position near the tip (front end) of the first portion 3C (i.e., near the front end 6F of the guide portion 6A). In this case, the joint between the tab member 31 and the first portion 3C is referred to as a tab joint 18. In this example, the tab joint 18 is formed on one end 21A of the tab member 31. Furthermore, in this example, the tab joint 18 is formed at a position near the tip of the first portion 3C. Examples of the method for joining the tab member 31 to the first portion 3C (i.e., the method for forming the tab joint 18) include various methods such as ultrasonic bonding, heat sealing, and bonding with an adhesive. Of the above methods for forming the tab joint 18, ultrasonic bonding is preferred from the viewpoints of ease of bonding, bonding strength, etc. The position at which the tab joint 18 is formed on the first portion 3C is preferably offset from the center of the first portion 3C, from the viewpoint of making it easier to raise the first portion 3C by lifting the tab member 31. From this viewpoint, the tab member 31 is preferably attached to the first portion 3C at a position away from the hinge portion 7 and away from the center of the main body 2. In other words, the tab member 31 is preferably attached to a position near the tip of the first portion 3C.

[0206] If the tab member 31 is joined to the first portion 3C at a position closer to the tip and further away from the hinge portion 7, the distance to the point of force on the hinge portion 7 (fulcrum) can be increased.

[0207] 43A , one end 21A of the tab member 31 is joined to the first portion 3C, and a tab portion is formed at the other end 21B of the tab member 31. The shape and structure of the tab portion 24 are not particularly limited as long as it is formed in a size and shape that allows the tab member 31 to be pinched.

[0208] (Orientation of tab member (attachment direction)) In the example of Fig. 43A, in the cover 1, the other end side of the tab member 31 is positioned closer to the center of the main body than one end 21A of the tab member. However, this is just one example, and the orientation of the tab member may be in a direction other than the direction shown in the example of Fig. 43A. For example, the other end side of the tab member may be positioned so as to face more toward the outside of the main body than one end side of the tab member.

[0209] [1-2 Actions and Effects] The lid 1 according to the seventh embodiment can be attached to the edge 103 of a container 101 as shown in FIG. 44 . Therefore, the lid 1 is formed so that a bonding region R can be formed for bonding to the edge 103 of a container 101 having an opening 102. The container 101 is preferably formed so that the opening diameter decreases downward from the opening 102, i.e., so that the container 101 is tapered downward. Furthermore, from the viewpoint of further strengthening the bonding strength between the container 101 and the lid 1, it is preferable that the container has a flange portion on the upper edge. This does not limit the shape of the container 101 to which the lid 1 is attached. However, considering the stackability of the containers, it is preferable that the outer peripheral surface of the container also be tapered toward the bottom. Furthermore, although the flange portion in FIG. 43 has a flat structure extending outward, the structure of the flange portion is not limited thereto. The flange portion may have a structure formed with an outward curl.

[0210] According to the lid 1 of the seventh embodiment, the first portion 3C is formed to enable a downward displacement state. When the lid 1 is joined to the container 101, the guide portion 6A is formed near the edge 102A of the opening 102 in a plan view of the lid 1. If the inner circumferential surface 104A of the container 101 is tapered toward the bottom surface 106, as shown in FIG. 45 , at least a portion of the assumed area can be positioned outside the inner circumferential surface 104A of the container 101, or the assumed area can be in contact with the inner circumferential surface 104A of the container 101. Here, the assumed area refers to the area through which the guide portion 6A is assumed to pass when the first portion 3C is pressed downward without deflection. FIG. 45 is a plan view showing an example of a state in which the main body 2 of the lid 1 is in a downward displacement state when the lid 1 is attached to the container 101.

[0211] Furthermore, in the case where a part of the assumed area is located outside the inner peripheral surface 104A of the container 101, if the first portion 3C is formed of a flexible material such as a paper-based material, when the first portion 3C is displaced downward relative to the second portion 3E, it is possible to form a state in which the outer peripheral edge of the first portion 3C (the portion corresponding to the guide portion 6A) is in contact with the inner peripheral surface 104A of the container 101 while the first portion 3C is deflected. Furthermore, in the case where the assumed area is in contact with the inner peripheral surface 104A of the container 101, when the first portion 3C is displaced downward relative to the second portion 3E, it is possible to form a state in which the outer peripheral edge of the first portion (the portion corresponding to the guide portion 6A) is in contact with the inner peripheral surface 104A of the container 101. In such a case, as shown in Figures 44 and 45, a portion of the space 105 of the container 101 (partial space) surrounded by the lower surface of the lid 1 (the surface opposite the exposed surface 70) and the inner peripheral surface 104A of the container 101 is closed, thereby forming a state in which at least a portion of the space 105 of the container 101 (partial space) is reclosed. Note that a state in which the first portion 3C is rotated upward relative to the second portion 3E (upward displacement state) and an exposed opening 6H is formed may be referred to as an open state. Also, a state in which the first portion 3C is rotated downward (downward displacement state) and the partial space of the space 105 is substantially closed (closed) (i.e., a state in which the lid 1 covers a portion of the space 105) is referred to as a closed state. A state in which the open state is once formed and then the closed state is again formed (a state in which the partial space of the space 105 is reclosed) is referred to as a reclosed state. In Figure 44, as an example of an upward displacement state, the state in which the first part 3C is rotated in the +F direction is shown by a dashed line at a position generally above the position in which the first part 3C is shown by a solid line. Also in Figure 44, as an example of a downward displacement state, the state in which the first part 3C is rotated in the -F direction is shown by a dashed line at a position generally below the position in which the first part 3C is shown by a solid line. The same applies to Figure 47. When a liquid such as a beverage is contained inside a conventional lid and a container with a lid, the user peels off the film material that forms the lid to expose the opening of the container in order to consume the contents of the container with a lid.In this case, even if an attempt is made to cover the exposed mouth portion with the lid again (sometimes referred to as a re-closed state), the state in which the lid covers the mouth portion is likely to be released. Furthermore, even when the mouth portion is closed with the lid, a large gap is likely to be formed between the lid and the mouth portion, and in such cases, liquid tends to leak through the gap between the lid and the mouth portion. Therefore, improvements have been required in lids to improve the stability of the re-closed state when used with a lidded container. In this regard, the lid of the present invention solves the above-mentioned conventional problems, making it possible to easily re-close the container and ensure airtightness when re-closed.

[0212] Next, a description will be given of modified examples of the lid 1 according to the seventh embodiment. Modified examples include those in which further configurations are added to or removed from the example of the lid 1 shown above.

[0213] [1-3 Variations] (Variation 1) When the tab member 31 is provided in the lid 1 according to the seventh embodiment, a locking portion may be provided on the tab member 31. This configuration is referred to as Variation 1 of the seventh embodiment.

[0214] (Latching Portion) The locking portion is a portion that forms a locking structure that enables the position of the first portion 3C to be maintained when the first portion 3C is pulled up in the lid 1. In the lid 1 according to the first variation of the seventh embodiment, the configuration of the locking portion is not particularly limited.

[0215] For example, the locking portion can be a retaining portion 23, as shown in Figures 49A and 49B. The retaining portion 23 can be exemplified by a structure formed so as to be able to protrude downward relative to the surface direction of the tab member 31. Here, the explanation will be continued using an example in which the locking portion is the retaining portion 23. Note that this does not limit the lid body 1 to the case in which the locking portion is the retaining portion 23. The locking portion may have a structure that can restrict displacement of the tab member 31 by being locked to a predetermined position on the lid body 1 or the container 101.

[0216] (Retaining Portion) The retaining portion 23 is preferably formed at a position between the one end 21A and the other end 21B of the tab member 31. An example of a configuration is one in which a cut line 23A is made in the tab member 31 so that a claw-like protruding portion can be formed when the tab member 31 is folded. The shape of the retaining portion 23 can be, but is not limited to, a triangular shape. For example, the shape of the retaining portion 23 can be any arbitrary shape, such as a semicircular shape, a polygonal shape such as a square shape, or an elliptical shape.

[0217] (Lock Receiving Portion) In the first variant of the seventh embodiment, a lock receiving portion may be provided on the second portion 3E. The lock receiving portion is formed in a shape that allows the locking portion to be received in the second portion. The position of the lock receiving portion may be determined according to the position of the locking portion. It is preferable that the lock receiving portion is formed in a position that faces the locking portion when the tab member 31 is pulled up to raise the first portion 3C, and then folded back toward the upper surface of the second portion 3E, and the tab member 31 and the first portion 3C are overlapped on the upper surface of the second portion 3E (when an upward displacement state is formed).

[0218] The locking receiving portion is not particularly limited, but in the example of Figures 49A and 49B, it is formed by a linear cut (insertion portion 26) formed at a predetermined position in the second portion. The insertion portion 26 is a cut portion that penetrates the main body 2 along the thickness direction of the main body 2. By inserting the holding portion 23 into the insertion portion 26, the position of the tab member 31 is more easily maintained, making it easier to maintain the upward displacement state. Note that the insertion portion 26 is an example of a locking receiving portion, and the configuration of the locking receiving portion is not limited to the insertion portion 26. For example, the holding portion 23 may be hooked onto an edge portion of the lid 1 located on the opposite side from where the locking portion is formed, or another configuration may be used.

[0219] (Variant 2) In the cover body 1 according to the seventh embodiment, in a plan view of the cover body 1, at least a portion of the hinge portion 7 is formed inside the outer peripheral edge of the joining region R (i.e., the outer end 5D of the joining region corresponding portion 5), and in the example of Figure 43A, the hinge portion 7 is formed inside the outer peripheral edge of the joining region R.

[0220] The cover 1 according to the seventh embodiment is not limited to the example shown in FIG. 43A . As shown in FIGS. 50A and 50B , at least one end of the hinge portion 7 (at least one of the ends 7A and 7B) may be arranged to overlap the joint region R in a plan view of the cover 1. In this case, the remaining portion of the hinge portion 7, excluding the end of the hinge portion 7 (at least one of the ends 7A and 7B) that overlaps the joint region R, may be formed on the inner portion 72D. This configuration is referred to as Modification Example 2 of the seventh embodiment. In Modification Example 2, the hinge portion 7 is formed inside the outer peripheral edge of the joint region R (the outer end 5D of the joint region corresponding portion 5). In this case, with regard to the guide portion 6A, a portion of the guide portion 6A may be positioned inside the joint region R (the inner portion 72D) as shown in FIG. 50A , or the guide portion 6A may be positioned in the joint region R as shown in FIG. 50B .

[0221] According to the second variant of the seventh embodiment, for example, when the end 7A of the hinge portion 7 is located in the joint region R and the end 7A of the hinge portion 7 and the end 6D of the guide portion 6A are connected, the end 6D of the guide portion 6A can be located in the joint region R. As a result, when the lid body 1 is displaced downward with the lid body 1 attached to the container 101 to reclose the container 101 with the lid body 1, the end 6D of the guide portion 6A can also more reliably close the partial space of the space portion 105 of the container 101. This also applies to the case where the end 7B of the hinge portion 7 is located in the joint region R and the end 7B of the hinge portion 7 and the end 6D of the guide portion 6A are connected.

[0222] (Variant 3) In the lid body 1 of the seventh embodiment, when the main body 2 is joined to the edge portion 103 of the container 101, at least one end portion of the hinge portion 7 (at least one of the end portions 7A and 7B) may be positioned outside the edge 102A of the opening 102 in a planar view of the main body 2 (in a planar view of the lid body 1).

[0223] (Variation 4) In the example of FIG. 43A , the guide portion 6A is formed inside the outer peripheral edge of the joining region R. The lid 1 according to the seventh embodiment is not limited to this, and a portion of the guide portion 6A may be formed on the outer portion 72. This configuration is referred to as Variation 4 of the seventh embodiment. In Variation 4 of the seventh embodiment, a portion of the guide portion 6A is formed on the inner portion 72D. In Variation 4 of the seventh embodiment, for example, as shown in FIG. 51B , a predetermined portion of the guide portion 6A, including the front end portion 6F, may be formed on the outer portion 72, and the remaining portion of the guide portion 6A may be formed on the inner portion 72D. In this case, by forming a portion of the guide portion 6A on the outer portion 72, a portion of the guide portion 6A can be positioned to overlap the joining region R in a plan view of the lid 1, allowing a portion of the first portion 3C to be positioned in the joining region R. This prevents the first portion 3C from rotating unintentionally, even if the guide portion 6A has a notched structure.

[0224] (Variation 5) In the lid 1 according to the seventh embodiment, when the main body 2 is joined to the edge 103 of the container 101, the distance between the joining region corresponding portion 5 and the guide portion 6A may be formed so as to gradually change from a position close to the hinge portion 7 (ends 6D, 6E) toward the front end 6F of the guide portion 6A, as shown in Fig. 51A . This configuration is referred to as Variation 5 of the seventh embodiment. In the lid 1 according to Variation 5 of the seventh embodiment, in a non-rotating state, in a plan view of the main body 2, the guide portion 6A is formed so that the further the position is from the position where the hinge portion 7 and the guide portion 6A are connected (ends 6D, 6E) along the extension direction of the guide portion 6A, the further away it is from the portion corresponding to the joining region R.

[0225] According to the lid body 1 of the seventh embodiment, when the main body 2 is joined to the edge portion 103 of the container 101, when the lid body 1 is displaced downward, it becomes easy to form a state in which the first portion 3C is more closely adhered to the inner surface 104A of the container 101 at the portion of the first portion 3C that is closer to the hinge portion 7.

[0226] (Variation 6) In the lid body 1 according to the seventh embodiment, in the example of FIG. 43A , the hinge portion 7 at the boundary 5A between the first portion 3C and the second portion 3E is located near the center of the main body 2, but the hinge portion 7 may be located at a position other than near the center of the main body 2. However, when the lid body 1 is joined to the edge portion 103 of the container 101 and the downward displacement state is formed, the hinge portion 7 is located so that the outer edge of the first portion 3C contacts the inner circumferential surface 104A of the container 101. As shown in FIG. 52A , the hinge portion 7 of the first portion 3C may be located closer to the front end 6F of the guide portion 6A. As shown in FIG. 52B , the hinge portion 7 of the first portion 3C may be located farther from the front end 6F of the guide portion 6A.

[0227] Next, an eighth embodiment will be described.

[0228] [2 Eighth Embodiment] [2-1 Configuration] (Lid) As shown in Figures 46A and 46B, the lid 1 according to the eighth embodiment has a main body 2, similar to the seventh embodiment, and a bonding region R is formed in the main body 2. Also, the lid 1 according to the eighth embodiment has an inner portion 72D and an outer portion 72, similar to the seventh embodiment. However, in the lid 1 according to the eighth embodiment, the tab member 31 described in the seventh embodiment may be omitted. In the description of the eighth embodiment, description of the same configuration as the seventh embodiment will be omitted.

[0229] The lid body 1 of the eighth embodiment has a protrusion 11 formed thereon, a part of the first portion 3C crossing the joining region R, and the part of the first portion 3C that crossed the joining region R is continuous (connected) to the protrusion 11.

[0230] (Extending Portion) The protruding portion 11 is a portion that protrudes outward from a predetermined portion of the outer peripheral edge 2A of the main body 2. The protruding portion 11 is formed in a size and shape that allows it to function as a knob for pulling up the first portion 3C when rotating the first portion 3C relative to the second portion 3E. For example, by pinching and pulling up the tip portion 11A of the protruding portion 11 or a portion nearby, the protruding portion 11 is displaced, and as described below, the first portion 3C connected to the protruding portion 11 is pulled up.

[0231] (First Portion and Second Portion) In the eighth embodiment, the main body 2 has a first portion 3C and a second portion 3E, and the first portion 3C is formed so as to be connected to the protruding portion 11 as described above. The boundary portion 5a between the first portion 3C and the second portion 3E has a guide portion 6A and a hinge portion 7, as in the seventh embodiment. However, unlike the seventh embodiment, the guide portion 6A is formed so as to avoid crossing the region (interval region RV) between the protruding portion 11 and the hinge portion 7 on the main body 2. In the example of FIG. 46A , the guide portion 6A is formed with a first guide portion 60 having one end 6D of the guide portion 6A as its base end and a second guide portion 61 having the other end 6E of the guide portion 6A as its base end. The first guide portion 60 extends in an arc from its base end (end portion 6D) toward the space region RV so as to move away from the hinge portion 7, then bends toward the protruding portion 11 at a position slightly outside the space region RV, and extends to the outer peripheral edge of the main body 2 (the outer peripheral edge 2A of the lid 1). Similar to the first guide portion 60, the second guide portion 61 extends in an arc from its base end (end portion 6D) toward the space region RV so as to move away from the hinge portion 7, then bends toward the protruding portion 11 at a position slightly outside the space region RV, and extends to the outer peripheral edge of the main body 2 (the outer peripheral edge 2A of the lid 1). However, this is just an example, and the configurations of the first guide portion 60 and the second guide portion 61 are not limited to this example. In FIG. 46A , the space region RV is indicated by the area surrounded by a two-dot chain line. The same applies to Figures 53A and 54A.

[0232] For example, the first guide portion 60 may extend in an arc shape from the end portion 6D toward the space region RV and away from the hinge portion 7, with the end portion formed slightly outside the space region RV. The second guide portion 61 may also extend in an arc shape from the end portion 6D toward the space region RV and away from the hinge portion 7, with the end portion formed slightly inside the space region RV, similar to the first guide portion 60. In this case, when not in use, the boundary between the second portion 3E and the first portion 3C is partially lost, and the first portion 3C is formed in accordance with the formation of the upward displacement state or the downward displacement state (when the protruding portion 11 is pulled up to raise a part of the main body 2 along the guide portion 6A and expose the exposure opening 6H).

[0233] In the lid body 1 according to the eighth embodiment, as in the seventh embodiment, the first portion 3C is formed so as to be able to form a downward displacement state, as shown in Figures 47 and 48. Figure 47 is a cross-sectional view showing an example of the lid body 1 attached to the container 101. Figure 48 is a plan view showing an example of the state in which the main body 2 of the lid body 1 forms the downward displacement state when the lid body 1 is attached to the container 101.

[0234] [2-2 Actions and Effects] The lid 1 according to the eighth embodiment can be used by being joined to the edge portion 103 of the container 101, similarly to the seventh embodiment.

[0235] According to the lid body 1 of the eighth embodiment, when the lid body 1 is used (when it is joined to the edge portion 103 of the container 101), the first portion 3C is raised relative to the second portion 3E by pulling up the protrusion 11. At this time, the first portion 3C and the second portion 3E are separated generally along the guide portion 6A, and the first portion 3C gradually rises while rotating relative to the second portion 3E around the hinge portion 7. At this time, the lid body 1 of the eighth embodiment is in an upward displacement state.

[0236] According to the lid 1 of the eighth embodiment, as in the seventh embodiment, the first portion 3C is formed to enable a downward displacement state. Furthermore, when the lid 1 is joined to the container 101, the guide portion 6A is formed near the edge 102A of the opening 102 in a plan view of the lid 1. Therefore, for example, when the first portion 3C is displaced downward relative to the second portion 3E, it is possible to achieve a state in which the outer edge of the first portion 3C (the portion corresponding to the guide portion 6A) is in contact with the inner circumferential surface 104A of the container 101, as shown in FIG. 48 . The protrusion 11 is connected to the first portion 3C, and can be deflected or deformed to conform to the shape of the first portion 3C, thereby achieving a state in which the protrusion 11 is in contact with the inner circumferential surface 104A of the container 101.

[0237] Therefore, with the lid body 1 according to the eighth embodiment, it is possible to form a re-closed state after forming an open state by forming an upward displacement state.

[0238] Next, a modified example of the lid body 1 according to the eighth embodiment will be described.

[0239] [2-3 Variations] (Variation 1) The cover 1 according to the eighth embodiment may be provided with a folding assist portion as shown in Figures 53A and 53B. This configuration is referred to as Variation 1 of the eighth embodiment.

[0240] (Bending assisting portion) The bending assisting portion 12 is a portion that guides the position at which the extension portion rises relative to the first portion 3C when the lid body 1 is joined to the edge portion 103 of the container 101 and a downward displacement state is formed in the lid body 1.

[0241] When the main body 2 is joined to the edge 103 of the container 101, the folding assist portion 12 is formed in the first portion 3C in a plan view of the main body 2 at a position from the protrusion 11 toward the hinge portion 7 (a position inside the gap region RV) and at a position inside the edge 102A of the opening 102 (a position closer to the center of the main body 2). In the example of Fig. 53, the folding assist portion 12 has a notched structure, but is not limited to this and may have a weakened structure.

[0242] (Variation 2) In the cover 1 according to the eighth embodiment, a locking portion may be provided on the protrusion 11. The locking portion may be configured similarly to the locking portion described in Variation 1 of the seventh embodiment. For example, the locking portion may be a retaining portion 23, as shown in Figures 54A and 54B. The retaining portion 23 may be formed similarly to the retaining portion 23 described in Variation 1 of the seventh embodiment. However, it is preferable that the retaining portion 23 protrudes in the opposite direction to the protrusion 11.

[0243] (Lock Receiving Portion) In Variant 2 of the eighth embodiment, a lock receiving portion may be provided in the second portion. The lock receiving portion may be configured similarly to the lock receiving portion described in Variant 1 of the seventh embodiment. For example, the lock receiving portion may be an insertion portion 26 as shown in FIGS. 54A and 54B . The insertion portion 26 may be formed similarly to the insertion portion 26 described in Variant 1 of the seventh embodiment. However, the position at which the insertion portion 26 is formed is preferably a position at which the insertion portion 26 can face the holding portion 23 when the first portion 3C is folded back around the hinge portion 7 and brought into contact with the second portion 3E. A position at which the insertion portion 26 can face the holding portion 23 also includes a case where the insertion portion 26 and the holding portion 23 can face each other when the first portion 3C is bent.

[0244] 55A and 55B, the lid 1 according to the ninth embodiment is formed in the same manner as the lid 1 according to the eighth embodiment, except that a low-adhesion region RPE is formed in the bonding region R of the main body 2, a guide portion 6A is formed so as to avoid crossing the region (interval region RV) between the low-adhesion region RPE and the hinge portion 7, and the protrusion 11 is omitted. In the example of Fig. 55A, the low-adhesion region RPE is shown by the region surrounded by a dashed line.

[0245] (Bonding Region) In the lid body 1 according to the ninth embodiment, a low-adhesion region RPE is formed in the bonding region R of the main body 2. The low-adhesion region RPE is identified as a portion with low adhesiveness (a portion that is easily peeled off) when the adhesiveness of the outside of the low-adhesion region RPE in the bonding region R is compared with the adhesiveness of the low-adhesion region RPE.

[0246] (Guide Portion) The guide portion 6A is formed to avoid crossing the region (interval region RV) between the low-adhesion region RPE and the hinge portion 7. This can be achieved, for example, by forming the first guide portion 60 and the second guide portion 61 as the guide portion 6A, as described in the eighth embodiment. In the example shown in Figures 55A and 55B, both the first guide portion 60 and the second guide portion 61 bend slightly inside the interval region RV and extend toward the outer edge portion 71C of the main body 2, crossing the low-adhesion region RPE. However, this is just one example, and the configuration of the guide portion 6A is not limited to Figures 55A and 55B. In the example shown in Figure 55A, the interval region RV is indicated by the region surrounded by a two-dot chain line.

[0247] [3-2 Actions and Effects] The lid 1 according to the ninth embodiment can be used by being joined to the edge 103 of the container 101, similarly to the eighth embodiment. In the lid 1 according to the ninth embodiment, the region of the outer portion 72 outside the low-adhesion region RPE is used as a gripping portion instead of the protruding portion 11 described in the eighth embodiment, so that the upward displacement state and the downward displacement state can be formed as described in the eighth embodiment. Furthermore, with the lid 1 according to the ninth embodiment, the re-closed state can be formed similarly to the eighth embodiment.

[0248] [4 Application Example] The lid body 1 according to the seventh to eighth embodiments can be used in a lidded container 150, as shown in Figures 44 and 47. Figures 44 and 47 are cross-sectional views showing examples in which the lid body 1 according to the seventh and eighth embodiments is joined to the edge portion 103, which is the portion of a container 101 having an opening 102, extending from the edge 102A of the opening 102 to the outer side. The lidded container 150 has a joint portion 151 where the container 101 and the lid body 1 are joined, and the region of the lid body 1 forming the joint portion 151 is the joint region R. The method for joining the lid body 1 and the container 101 is not particularly limited, and joining methods such as crimping and heat sealing can be used as appropriate. The following describes an example in which the lid body 1 according to the seventh embodiment is used in a lidded container 150.

[0249] In the example shown in FIG. 44 etc., the container 101 has a container body 110 having a cylindrical side wall 104 and a bottom surface 106 that increase in diameter upward (or taper downward), forming a space 105 therein, and an opening 102 that opens at the upper end of the container body 110 (the upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is circular. However, the container 101 shown here is merely an example and is not intended to limit the configuration of the container 101. For example, the opening 102 of the container 101 may be rectangular. The container 101 may be any container as long as the opening 102 can be covered with the lid 1. Furthermore, the material stored inside the container 101 (space 105) is not particularly limited, and examples include liquid materials, solid materials, and combinations thereof.

[0250] In the container shown in Fig. 44, edge 103 formed by the portion outward from edge 102A of opening 102 has flange 108. Flange 108 may be a curled portion formed by outwardly wrapping a member forming container body 110 as shown in Figs. 44, 47, etc., or may be formed as a portion (brim) extending outward on a plane.

[0251] The lid 1 according to the seventh embodiment may be combined with a container 101 having an opening 102 .

[0252] 64 and 65, the first portion 3C is preferably configured so that water droplets adhering to the underside of the first portion 3C can flow down into the container when the first portion 3C is opened. For example, as shown in FIG. 64, when the retaining portion 23 formed on the tab member 31 is inserted from below into the hole-shaped retaining portion 26 formed in the knob to maintain the first portion 3C open, the open portion of the first portion 3C is preferably horizontal, or is configured so that the end of the lid 1 where the tab member is attached to the first portion 3C is the upper end and slopes downward from this upper end toward the center of the lid. Positioning the first portion 3C in this manner allows water droplets adhering to the underside of the lid to flow down into the container when the lid is opened, significantly reducing the likelihood of the user's hands getting wet or soiled by water droplets adhering to the underside of the lid when operating the lid, for example, when attempting to reclose the first portion 3C that has been opened. Furthermore, it is preferable to form a guide portion 500 on the lid to guide water droplets so that they can flow more smoothly into the container. Various shapes of the guide portion 500 are possible. For example, it is preferable to form a streaky guide portion 500 by embossing or other methods beforehand when molding the lid 1, or to perform a specific process on the lid to make it easier for the user to bend when opening the lid. Furthermore, when the first portion 3C is resealed after being opened, it is preferable to employ a wave-shaped shape 501, such as that shown in FIG. 67, along at least a portion of the shape along the contour of the first portion 3C, in order to facilitate maintaining the resealed state of the first portion 3C. This shape makes it easier for the first portion 3C to catch and maintain the resealed state.

[0253] The above description of [4. Application Example] is not limited to the case where the lid 1 according to the seventh embodiment is used, but can also be applied to the case where the lid 1 according to the eighth embodiment is used as shown in Fig. 47. Furthermore, the description of [4. Application Example] may be similarly applied to the ninth embodiment.

[0254] Next, tenth to thirteenth embodiments of the lid according to the present invention will be described in detail with reference to the drawings.

[0255] [1 Tenth Embodiment] [1-1 Configuration] (Container with Lid) A container with lid 150 according to the tenth embodiment includes a container 101 and a lid 1 attached to the container 101. The container with lid 150 also includes a joint 50 that joins the container 101 and the lid 1. The tenth embodiment describes an example in which a separate tab member 31 is provided on the small lid portion 3 of the lid 1. However, this is merely an example and does not exclude cases in which a tab member is not provided on the small lid portion. The tab member is not limited to being provided on the small lid portion as a separate member; a portion corresponding to the tab member may be integrally formed on the small lid portion. The tenth embodiment describes an example in which the container 101 has a circular shape in a cross section of the container 101 in a plan view of the container with lid 150. However, the shape of the container 101 is not limited thereto. The cross section of the container 101 may be rectangular, polygonal, or a shape combining curves and straight lines.

[0256] (Lid) The lid 1 is used by being joined to the container 101 along an edge 103 (described later) of the container 101. In the example of FIG. 56A , the shape of the outer peripheral contour of the lid 1 is generally circular in a plan view of the lid 1. However, this is not limited thereto, and the shape of the outer peripheral contour of the lid 1 may be rectangular or elliptical, for example. The lid 1 is formed in a shape that can cover at least a portion of the opening 102 (described later) of the container 101. In the example of FIG. 56A , the lid 1 is formed to cover the entire opening 102 when the small opening 6 is closed by the small lid portion 3 (the area of ​​the small opening 6 is generally covered by the small lid portion 3). Note that covering the entire opening 102 includes cases where the opening 102 is completely covered, and cases where the main body or small lid portion of the lid 1 has a small hole structure, such as a small hole for venting air inside the container to the outside, or a slit or notch having a predetermined function, formed therein.

[0257] The lid 1 includes a main body 2 having a small opening 6, and a small lid portion 3 that covers the small opening 6. As shown in the example of Fig. 56A, the lid 1 may also include a tab member 31 that is connected to the small lid portion 3. In the lid 1, the small lid portion 3 and the small opening 6 form an opening forming portion 4.

[0258] (Main Body) The main body 2 has a portion that forms the joint 50 described below and is connected to the small cover 3 via the hinge 7. In the example of FIG. 56A , before the small cover 3 is lifted to form the small opening 6, the main body 2 is preferably connected to the small cover 3 by not only the hinge 7 but also a connection structure 17 that connects the edge of the small opening 6 of the main body 2 to the edge of the small cover 3. The connection structure 17 is configured to locally connect the edge of the small opening 6 of the main body 2 to the edge of the small cover 3 at a predetermined position along the longitudinal direction of the portion where the edge of the small opening 6 of the main body 2 faces the edge of the small cover 3. Note that the connection structure 17 may be a perforated structure as shown in FIG. 56B (in FIG. 56B , cut portions 18B and connection structures 17 are alternately arranged), or may be a half-cut portion 16 as shown in FIG. 58 . In this case, the half-cut portion 16 may be formed along the edge of the small opening 6 of the main body 2 over the entire edge of the small opening 6 (the portion forming the outer peripheral edge 3A), or may be formed locally.

[0259] (Opening Forming Portion) As shown in Figure 56A etc., the opening forming portion 4 is defined as a portion where the small opening 6 opens and closes in accordance with the displacement of the small lid portion 3. The opening forming portion 4 is defined as a portion having the small opening 6 and the small lid portion 3. The opening forming portion 4 is formed so that, as shown in Figure 56, the small lid portion 3 closes the small opening 6, and the small lid portion 3 is displaced to open the small opening 6. The opening forming portion 4 is formed at a position offset from the center CT of the lid body 1 to a predetermined position in the outward direction (outward direction) from the center CT.

[0260] The opening forming portion 4 is configured so that when the small lid portion 3 is opened with the lid body 1 attached to the container 101, the space portion 105 of the container 101 can be seen through the small opening portion 6.

[0261] (Small opening) The small opening 6 is formed to penetrate the surface 73A of the lid 1 facing the container 101 and the surface of the lid 1 not facing the container 101 (exposed surface 70 of the lid 1). The small opening 6 is formed inside the portion of the lid 1 corresponding to the joint 50 in a plan view so that the opening area is smaller than that of the opening 102. The small opening 6 is intended to form an opening for the contents (e.g., beverages, food, etc.) in the space 105 of the container 101 in the lid-equipped container 150. When the small lid portion 3 is lifted up from the main body 2, the small opening 6 is exposed.

[0262] (Small lid portion) The lid body 1 is provided with a small lid portion 3. The small lid portion 3 covers the small opening 6 in an openable and closable manner. In the example of Fig. 56, the small lid portion 3 is formed so that it can be displaced into a pulled-up state relative to the main body 2, and the small opening 6 is formed when the small lid portion 3 is pulled up.

[0263] In the lid 1 shown in the example of Figure 56, the small lid portion 3 is located inside (toward the center CT) the portion corresponding to the joint 50 in a plan view of the lid 1. In the example shown in Figure 56, the small lid portion 3 is displaced (rotated) so as to be lifted in conjunction with the movement of the tab member 31 joined to the small lid portion 3 at the tab joint 18. The main body 2 and the small lid portion 3 are connected by a hinge portion 7. As the small lid portion 3 is lifted around the hinge portion 7 as a support axis, the small opening 6 is exposed. Note that in the example of Figure 56, the portion forming the exposed surface 70 of the lid 1 excluding the small lid portion 3 becomes the main body 2 in a plan view of the lid 1.

[0264] The shape and structure of the small lid portion 3 are not particularly limited. Furthermore, as shown in FIG. 56 , the shape of the small lid portion 3 preferably has a contour shape in which at least a portion of the outer periphery 3A of the small lid portion 3 extends along the portion corresponding to the joint 50 (the portion forming the joint 50). In the example of FIG. 56 , the shape of the front edge 75A of the outer periphery 3A of the small lid portion 3 is shaped to follow the inner edge of the joint region R. Furthermore, in this case, the shape of the front edge 75A tends to follow the inner edge of the edge portion 103. This shape of the small lid portion 3 may be applied to the small lid portion 3 of the lid body 1 according to the tenth embodiment. Hereinafter, unless otherwise specified, the description of the lid body 1 will be continued assuming that the small lid portion 3 shown in FIG. 56 is used. In the example of the small lid portion 3 shown in FIG. 56 , the outer periphery 3A is composed of the front edge 75A and a side edge 76 connecting the front edge 75A and the hinge portion 7.

[0265] The outer peripheral edge 3A of the small lid portion 3 may be connected to the main body 2 by the connecting structure 17 as described above.

[0266] In the lid body 1 according to the tenth embodiment, the small lid portion 3 can be raised to cover the small opening 6 even after the small opening 6 is exposed. When the small lid portion 3 is raised, the small opening 6 is exposed. This state is called the open lid state. When the small opening 6 is covered by the small lid portion 3, it is called the closed lid state.

[0267] The lid body 1 can be put into a closed state even after being in an open state, and when put into a closed state, the end face (outer peripheral end face) of the outer peripheral edge 3A of the small lid portion 3 can face the end face formed at the position of the small opening 6 of the main body 2.

[0268] (Hinge portion) As described above, the hinge portion 7 is formed on the cover 1, and the hinge portion 7 rotatably connects the small cover portion 3 to the main body 2. The hinge portion 7 may be a perforated structure or a half-cut portion, similar to the connection structure 17.

[0269] (Tab Member) As shown in the example of FIG. 56, the tab member 31 has a gripping portion 24 formed in a portion including the other end portion 16B.

[0270] In the example of Figure 56, the tab member 31 is joined to the small cover 3 at one end 16A of the tab member 31, and this joining forms a tab joint 18. The position of the part of the small cover 3 that corresponds to the tab joint 18 is not limited, but in the example of Figure 56, the tab joint 18 is joined to a part of the small cover 3 near the tip (a position close to one end 14A).

[0271] (Joint Portion) In the lidded container 150, a joint portion 50 is formed as a portion where the lid 1 and the container 101 are joined. The joint portion 50 has at least a wide portion 51 and a narrow portion 52 that is narrower than the wide portion as portions having different widths. The width of the joint portion 50 indicates the size of the joint portion 50 in a direction perpendicular to the longitudinal direction (direction of arrow F) of the joint portion 50 and along the surface direction of the main body 2 in a plan view of the lid 1 (H1 and H2 in Figures 56, 58 to 61).

[0272] The portion of the joint that is determined to be relatively wide is identified as the wide portion 51 (with a width H1), and the portion excluding the wide portion 51 (the portion whose width is equal to or less than the wide portion 51 (with a width H2)) is determined as the narrow portion 52. The boundary position between the wide portion 51 and the narrow portion 52 is defined as being included in the wide portion 51. Therefore, if the width of the joint 50 gradually narrows from the wide portion 51 toward the narrow portion 52, the gradually narrowing portion is considered to be included in the wide portion 51. The joint 50 is in a state in which the narrow portion 52 is connected to the two ends of the wide portion 51 along the longitudinal direction (direction of arrow F). This allows the force applied near the boundary between the wide portion 51 and the narrow portion 52 to be released toward the narrow portion.

[0273] (Arrangement of Wide Portion and Small Lid Portion) In the container with lid 150, the arrangement of the wide portion 51 and the small lid portion 3 satisfies the following condition 1.

[0274] Condition 1: When the small opening is covered by the small lid portion, when half lines starting from the center of the lid body and intersecting the wide portion are imagined in a plan view of the lid body, at least one half line intersects the small lid portion.

[0275] In the example of Fig. 56, at least the half line M1 that starts from the center of the lid and intersects with the wide width portion 51 passes through the area where the small lid portion 3 exists, i.e., intersects with the small lid portion 3. The half line M1 is a half line that intersects with the wide width portion 51 at a position slightly shifted from the center CL of the wide width portion 51 along the longitudinal direction F of the wide width portion 51.

[0276] (Container) The container 101 has a main body having a cylindrical side wall 107 and a bottom 106 whose diameter increases upward, forming a space 105 therein, and an opening 102 that opens at the upper end of the main body (the upper end of the side wall 107). Although not shown, the opening 102 of the container 101 is surrounded by an edge 103, which is formed in a circular shape. However, the container 101 shown here is an example and is not intended to limit the configuration of the container 101. For example, the edge 103 of the container 101 may be formed in a rectangular shape. The container 101 may be any container as long as the opening 102 can be covered with the lid 1. Furthermore, the contents stored inside the container 101 are not particularly limited, and examples include liquids, solids, and combinations thereof. 57 , the edge 103 has a curled portion 109 formed by outwardly winding the member forming the main body 101A of the container 101, but the container 101 is not limited to this. The end face of the side wall 107 may be exposed at the edge 103, or the edge 103 may have a flange extending outward from the opening 102 of the container 101.

[0277] [1-2 Manufacturing Method] The lidded container 150 can be manufactured by placing the lid 1 on the opening 102 of the container 101 and joining the lid 1 and the container 101 to form the joint 50. The method for joining the lid 1 and the container 101 is not particularly limited, and any joining method such as crimping or heat sealing can be used as appropriate.

[0278] [1-3 Actions and Effects] According to the lidded container 150 of the tenth embodiment, the joint 50 has portions with different widths, and at least one of the semi-lines connecting the wide-width portion 51 and the center of the lid 1 intersects the small lid portion in a plan view of the lid. This facilitates the formation of a state in which the wide-width portion is located near at least a portion of the small lid portion and the small opening, increasing the strength of the portions near the small lid portion and the small opening and preventing the strength of the portions away from the small lid portion and the small opening from becoming relatively strong. Therefore, even if force is applied to the small lid portion when the small lid portion is pinched and pulled up, the wide-width portion facilitates stabilizing the shape of the small opening. Furthermore, it is possible to facilitate dissipating the force applied to the small lid portion to the narrow width portion.

[0279] [2 Eleventh Embodiment] In the description of the tenth embodiment above, the lidded container was provided with a tab member 31. The tab member 31 is not limited to that described in the tenth embodiment. As shown in Fig. 59, the lidded container according to the tenth embodiment may be provided with a fixing structure forming portion 23 that detachably fixes the tab member 31 when the small lid portion 3 is pulled up by the tab member 31. Hereinafter, this embodiment will be referred to as the eleventh embodiment. Fig. 59 is a plan view schematically showing one example of a lid used in the lidded container according to the eleventh embodiment.

[0280] (Fixing Structure Forming Portion) The fixing structure forming portion 23 is not particularly limited as long as it has a structure that can detachably fix the position of the tab member 31 when the tab member 31 is pulled up. For example, in the example of Fig. 59, the fixing structure forming portion 23 is formed by a claw portion 23B and a receiving portion 20. The claw portion 23B is a portion that protrudes downward by bending the knob portion. The receiving portion 20 is also formed in the main body 2 in the shape of a slit. The receiving portion 20 is formed in a position that faces the claw portion 23B when the small lid portion 3 is pulled up to position the tab member 31 on the main body 2.

[0281] (Actions and Effects) According to the lidded container 150 of the eleventh embodiment, the fixing structure forming portion 23 is provided, so that the state in which the small lid portion 3 is pulled up and the small opening 6 is formed can be maintained.

[0282] [3 Twelfth embodiment] In the lidded container of the tenth embodiment, in addition to condition 1 shown in the tenth embodiment, the arrangement of the wide portion 51 and the small lid portion 3 may also satisfy condition 2, which will be described later, as shown in Figure 60. Hereinafter, this embodiment will be referred to as the twelfth embodiment. Figure 59 is a plan view schematically showing one example of a lid used in a lidded container according to the twelfth embodiment.

[0283] Condition 2 for the arrangement of the wide portion 51 and the small cover portion 3 is as follows.

[0284] Condition 2: When the small opening is covered by the small lid portion, in a plan view of the lid body, the center of the hinge portion is formed at a position that is off from the line of the half-straight line that starts at the center of the lid body and passes through the center of the wide portion along the longitudinal direction of the wide portion.

[0285] 60, in a plan view of the lid 1, the center HP of the hinge portion is formed at a position deviated from the half line (half line MCL) that starts at the center CT of the lid, runs along the longitudinal direction of the wide portion 51, and passes through the center CL of the wide portion 51. Note that the center HP of the hinge portion 7 refers to the midpoint between the two ends 7A and 7B of the hinge portion 7.

[0286] (Operations and Effects) In the lidded container 150 according to the twelfth embodiment, the center CT of the hinge portion 7 is offset from the half-line MCL, so that the distance between the center CL of the wide width portion 51 and one end 7A of the hinge portion 7 can be made different from the distance between the center CL of the wide width portion 51 and the other end 7B. For example, the end 7B can be positioned closer to the center CL of the wide width portion 51 and the end 7A can be positioned farther away. In this case, when the small lid portion 3 is lifted, the shape of the end 7A is more likely to change than the end 7B, and it is possible to form portions of the small lid portion 3 that are easy to lift and portions that are relatively difficult to lift, making it easier to lift the small lid portion 3 gradually, rather than all at once.

[0287] [4 Thirteenth Embodiment] In the lidded container of the tenth embodiment, the joint 50 may have a plurality of wide portions 51 and narrow portions 52 formed in multiple locations, as shown in Fig. 61. This embodiment is referred to as the thirteenth embodiment. Fig. 61 is a plan view schematically showing one example of a lid used in the lidded container according to the thirteenth embodiment.

[0288] Next, a fourteenth embodiment of the lid according to the present invention will be described.

[0289] (Lid) The lid 1 is used by being joined along the edge 103 of the opening 102 of the container 101. The lid 1 is formed into a shape that covers the opening 102 when joined to the opening 102 of the container 101. As shown in Fig. 62 , the lid 1 has a joining region R that is joined to the edge 103 of the opening 102 of the container 101. Fig. 62 is a diagram showing one embodiment of the lid 1.

[0290] (Bonding Region) The bonding region R is a region formed in a ring shape along the opening 102 of the container 101 in a shape corresponding to the opening 102. The width W (width along the inward / outward direction) of the bonding region R is typically the same as or narrower than the width of the edge 103 of the opening 102. However, this does not prohibit the width W of the bonding region R from being wider than the width of the edge 103 of the opening 102. Furthermore, the bonding region R may be formed inside the outer peripheral edge 71D of the lid 1, or may be formed up to the outer peripheral edge 71D of the lid 1 as shown in FIG. 62. FIG. 62 is a plan view showing one embodiment of the lid 1.

[0291] The lid 1 includes a main body 2 having a small opening 6, a small lid piece 13 that covers the small opening 6, and a tab member 31. In the lid 1, the small lid piece 13 and the small opening 6 form an opening forming portion 4.

[0292] (Opening Forming Portion) As shown in Figure 62 etc., the opening forming portion 4 has the small opening 6 and small lid piece 13 as described above. The opening forming portion 4 is formed so that the small lid piece 13 and the small opening 6 are in a state where the small lid piece 13 closes the small opening 6, and in a state where the small lid piece 13 is open and the small opening 6 is open, as shown in Figure 62. The opening forming portion 4 is provided at a position shifted from the center of the lid body 1 to a predetermined position in the outward direction.

[0293] The opening forming portion 4 is configured so that when the small cover piece 13 is opened with the cover body 1 attached to the container 101 , the space portion 105 of the container 101 can be seen through the small opening portion 6 .

[0294] (Opening) The small opening 6 constituting the opening forming portion 4 is formed so as to penetrate the surface of the lid 1 facing the container 101 and the surface of the lid 1 not facing the container 101 (exposed surface 70 of the lid 1). For example, when the lid 1 is attached to the container 101, the small opening 6 serves to form an opening for the contents (e.g., beverages, food, etc.) in the space 105 of the container 101 to enter and exit. The lid 1 is formed so that the small opening 6 is exposed when the small lid piece is lifted up.

[0295] (Small lid piece) The lid body 1 is provided with a small lid piece 13. The small lid piece 13 is formed so that it can be displaced to a pulled-up state relative to the main body, and in the lid body 1, a small opening 6 is formed when the small lid piece 13 is pulled up.

[0296] In the lid 1 shown in the example of FIG. 62 , the small lid piece 13 is provided in a region of the exposed surface 70 of the lid 1 that corresponds to the inside of the joining region R (hereinafter, simply referred to as the region inside the joining region R or the inner region Rn) in a plan view of the lid 1 (the line of sight is the vertical direction). The small lid piece 13 is connected to the main body 2, which includes the joining region R. As shown in FIG. 62 , in the lid 1, the small lid piece 13 is displaced so as to be lifted in conjunction with the movement of the tab member 31 joined to the small lid piece 13 at the first joining portion 210A. The small lid piece 13 uses the connection portion between the main body 2 and the small lid piece 13 as a hinge portion, and as the small lid piece 13 is lifted around the connection portion as a pivot, the small opening 6 is exposed. The small lid piece 13 is provided inside the joining region R in a plan view of the lid 1. Hereinafter, the connecting portion (hinge portion) of the outer peripheral edge 3A of the small cover piece 13 that serves as a support axis when the small cover piece 13 is lifted will be referred to as the hinge connecting portion 74. Note that the main body 2 is configured from the portion that forms the exposed surface 70 of the cover body 1 in a plan view of the cover body 1, excluding the small cover piece 13.

[0297] The shape and structure of the small lid piece 13 are not particularly limited. Furthermore, as shown in FIG. 62 , the shape of the small lid piece 13 preferably has a contour such that at least a portion of the outer periphery 3A of the small lid piece 13 extends along the inner edge of the joining region R. In the example of FIG. 62 , the shape of the front edge 75A of the outer periphery 3A of the small lid piece 13 is shaped to follow the inner edge of the joining region R. Furthermore, in this case, the shape of the front edge 75A tends to follow the inner edge of the edge 103 of the opening 102. Such a shape of the small lid piece 13 may be applied to the small lid piece 13 of the lid body 1 according to the first embodiment. Hereinafter, unless otherwise specified, the description of the lid body 1 will be continued assuming that the small lid piece 13 shown in FIG. 62 is used. In the example of the small cover piece 13 shown in Figure 62, the outer peripheral edge 3A is composed of a front edge portion 75A, a hinge connection portion 74, and a side edge portion 76 connecting the front edge portion 75A and the hinge connection portion 74.

[0298] The outer peripheral edge 3A of the small lid piece 13, excluding the hinge connection portion 74, may form a cut portion, which is cut from the main body 2, or a fragile portion, which is partially joined. The cut portion can be formed by providing a cut line along the boundary between the small lid piece 13 and the main body 2. The fragile portion can be formed by providing a structure (perforated structure) in which short cut lines and point-like joints are alternately arranged at the boundary between the small lid piece 13 and the main body 2, or by forming a half-cut structure, as shown in the example of Figure 62. The half-cut structure can refer to a structure in which the lid body 1 is cut to a predetermined depth in the thickness direction. In this case, the depth of the cut in the half-cut structure is preferably at least half the thickness of the lid body 1 but less than the thickness of the lid body 1. The hinge connection portion 74 may also be a fragile portion.

[0299] In the lid body 1 according to this embodiment, the small lid piece 13 can be raised to cover the small opening 6 even after the small opening 6 is exposed. When the small lid piece 13 is raised, the small opening 6 is exposed. This state is called the open lid state. When the small opening 6 is covered by the small lid piece 13, it is called the closed lid state.

[0300] As shown in FIG. 62 , the lid 1 can be closed even after being in the open state. When in the closed state, the end face 73a (outer peripheral end face) of the outer periphery 3A of the small lid piece 13 faces the end face formed at the position of the small opening 6 of the main body 2. In this case, the portion of the end face of the main body 2 facing the end face 73a of the outer periphery 3A of the small lid piece 13 is the facing surface. In the lid 1 according to the fourteenth embodiment, it is preferable that the end face 73a of the outer periphery 3A and the facing surface come into contact with each other to form a contact portion. In this case, the lid 1 can form a state in which the contact portion tightly covers the small opening 6 in the closed state. However, when the lid 1 is in the open state, the small lid piece 13 and the main body 2 are separated from each other, ensuring breathability and allowing steam to pass between the small lid piece 13 and the main body 2.

[0301] (Tab Member) The tab member 31 has a first portion 210 that is joined to the small lid piece 13, and a second portion 211 that can be joined to the main body when the small lid piece 13 is pulled up.

[0302] In the example of Fig. 62, the first portion 210 forms one end 21a of the tab member 31. The portion of the small flap piece 13 to which the first portion 210 is joined is not limited, but in the example of Fig. 62, the first portion 210 is joined to a portion of the small flap piece 13 near the tip (a position close to one end 13a).

[0303] The second portion 211 is a portion of the tab member closer to the other end 21b than the first joint portion 210A. As shown in the example of FIG. 62, the tab member preferably has a tab portion 24 formed in a portion including the other end 21b. In this case, the second portion 211 is preferably formed closer to the one end 21A than the tab portion 24. The second portion 211 is formed so as to be joinable to the main body 2, and is positioned so as to be joinable to the main body when the small cover piece 13 is pulled up. The second portion 211 may be located away from the first portion 210, or may be adjacent to the first portion 210.

[0304] Furthermore, from the viewpoint of fitting the tab member 31 within the exposed surface 70 of the lid body 1 in a plan view of the lid body 1, it is preferable that the tab member 31 is arranged so that the second portion 211 is located closer to the center of the lid body 1 than the first portion 210, as shown in the example of Fig. 62. However, the tab member 31 may be arranged so that the distance from the center of the lid body 1 to the first portion 210 is the same as the distance from the center of the lid body 1 to the knob portion 24, and this does not prohibit the tab member 31 from being arranged so that the first portion 210 is located closer to the center of the lid body 1 than the second portion 211.

[0305] (First Joint Portion and Second Joint Portion) In the lid body 1, a first joint portion 210A is formed at a portion where the small lid piece 13 is joined to the first portion 210. Also, a second joint portion 211A is formed at a portion where the second portion 211 and the main body 2 are joined.

[0306] In the lid body 1, the strength of the bond (bonding force) between the second portion 211 and the main body 2 at the second bond portion 211A is smaller than the strength of the bond (bonding force) between the first portion 210 and the small lid piece 13 at the first bond portion 210A. This can be achieved, for example, by fixing the first portion 210 and the small lid piece 13 by ultrasonic bonding, heat sealing, bonding with an adhesive, or the like, and then adhering the second portion 211 and the main body 2 with a removable adhesive. The removable adhesive may be fixed to the tab member 31 or to the main body 2. Furthermore, adhesives with different adhesive strengths may be provided on the first portion 210 and the second portion 211. The bonding strength between the first portion 210 and the small lid piece 13 refers to the amount of force required to separate the first portion 210 and the small lid piece 13 without tearing them. The bonding strength between the second part 211 and the main body 2 indicates the magnitude of the force required to separate the second part 211 and the main body 2 without tearing them. The case where the first part 210 and the small cover piece 13 tear when they are separated corresponds to the case where the bonding strength is greatest.

[0307] According to the lid 1, a lid can be obtained in which the opening corresponding to the drinking spout can be opened easily and hygienically.

[0308] (Application Example) The lid 1 can be used for a lidded container 150 as shown in Fig. 63. Fig. 63 is a cross-sectional view showing an example in which the lid 1 according to this embodiment is joined to the edge 103 of the opening 102 of a container 101 having an opening 102. The method for joining the lid 1 and the container 101 is not particularly limited, and joining methods such as crimping and heat sealing can be used as appropriate.

[0309] The container 101 has a main body having a cylindrical side wall 104 and a bottom surface 106 whose diameter increases in the upward direction, forming a space 105 therein, and an opening 102 that opens at the upper end of the main body (the upper end of the side wall 104). Although not shown, the opening 102 of the container 101 is formed in a circular shape. However, the container 101 shown here is only an example and is not intended to limit the configuration of the container 101. For example, the container may have a rectangular opening. The container may be any container as long as the opening can be covered with a lid. Furthermore, the substance stored inside the container is not particularly limited, and examples include liquid substances, solid substances, and combinations thereof.

[0310] 63, the edge 103 of the opening 102 has a curled portion 109 formed by outwardly winding the member forming the body of the container 101, but the container 101 is not limited to this. The end face of the side wall 104 may be exposed at the edge 103 of the opening 102, or the edge 103 of the opening 102 may have a flange formed thereon that extends outward from the opening 102 of the container 101.

[0311] The lid may also be combined with a container having a mouth.

[0312] As described above, the lid 1 according to the present invention can be applied to many of these types of lids 1. It can also be applied to lids 1 of other types than those described above. The lid according to the present invention has been described in detail above, but the above examples are merely examples of the lid according to the present invention and are not intended to be limiting. Therefore, modifications may be made as appropriate within the scope of the present invention. Furthermore, the configurations of the lids described above may be used independently, or the configurations of the lids in the respective examples may be applied in appropriate combination.

[0313] Based on the above description of this specification, the present invention may adopt the following configurations. [E1] A lid formed to be joinable to a container having an opening formed at an upper end and a rim forming the outer periphery of the opening, comprising: a base portion having a joining area corresponding to an area to be joined to the container along the rim of the container and a small opening having an opening area smaller than the opening of the container; a small lid portion for opening and closing the small opening; and a hinge portion connecting the base portion and the small lid portion, the small lid portion being configured to be rotatable relative to the base portion about the hinge portion as an axis, and having an eave portion inward from an inner edge of the joining area corresponding to the base portion and outward from the opening edge of the small opening in a plan view of the base portion. [E2] The lid described in [E1] above, wherein the eave portion is a margin portion defined as a portion that satisfies the following conditions 1 and 2. Condition 1: In a plan view of the base portion, the margin portion is a portion of the base portion formed inward from the inner edge of the joint area corresponding portion and outward from the opening edge of the small opening. Condition 2: In a plan view of the base portion, when a line segment connecting the margin portion and the hinge portion is imagined, the line segment passes through the opening edge of the small opening. [E3] The lid described in [E2] above, wherein, in a plan view of the base portion, the area of ​​the margin portion is smaller than the area of ​​the small opening. [E4] The lid described in [E2] or [E3] above, wherein the margin portion is formed such that the inner edge and the outer edge of the margin portion are non-concentric. [E5] The lid described in any one of [E2] to [E4] above, wherein the margin portion has an inclined portion that slopes downward from the outer edge of the margin portion toward the inner edge of the margin portion. [E6] The lid according to any one of [E1] to [E5] above, wherein a knob is provided on the upper surface side of the small lid. [E7] The lid according to [E6] above, wherein the knob has a tab member, and the tab member is joined to the upper surface side of the small lid. [E8] The lid according to [E7] above, wherein, when the small lid closes the small opening, a part of the tab member intersects with the opening edge of the small opening in a plan view of the base.[E9] The lid described in any one of [E6] to [E8] above, having a holding structure forming part that holds the small lid part in a state where the small opening is opened by rotating the small lid part relative to the base part about the hinge part as an axis, wherein a claw part is provided on the knob part, and a receiving part is provided on the base part at a position where it contacts the claw part, and the claw part and the receiving part form the holding structure forming part. [E10] The lid described in any one of [E1] to [E9] above, having an extension part formed on the outer periphery of the base part. [E11] The lid described in [E10] above, having a holding structure forming part that holds the small lid part in a state where the small opening is opened by rotating the small lid part relative to the base part about the hinge part as an axis, wherein a knob part is provided on the upper surface of the small lid part, and a claw part is provided on the knob part, and the extension part and the claw part form the holding structure forming part. [E12] The lid according to [E10] or [E11] above, wherein the hinge portion is formed between the extension portion and the tip of the small lid portion. [E13] The lid according to any one of [E1] to [E12] above, wherein a recessed portion is formed in the inner part of the portion corresponding to the joint area. [E14] The lid according to any one of [E1] to [E13] above, wherein a protruding portion is formed on the outer periphery of the small lid portion, and a concave-shaped portion corresponding to the protruding portion is formed on the opening edge of the small opening. [E15] The lid according to any one of [E1] to [E14] above, wherein a recessed portion is formed on the outer periphery of the small lid portion, and a convex-shaped portion corresponding to the recessed portion is formed on the opening edge of the small opening. [E16] The lid according to any one of [E1] to [E15] above, wherein a connecting structure is formed that connects the outer peripheral edge of the small lid portion and the opening edge of the small opening, the connecting structure being a weak part that is weaker than the small lid portion, and the weak part is broken when the small lid portion rotates relative to the base portion around the hinge portion as an axis. [E17] The lid according to [E16] above, wherein the weak part has a combined structure of a connecting part and a slit, and / or a half-cut structure.[E18] The lid described in any one of [E1] to [E17] above, which is formed from a sheet material made of a resin material. [E19] The lid described in any one of [E1] to [E18] above, which has a holding structure forming part that holds the small lid part in a state where the small opening is open by rotating the small lid part relative to the base part around the hinge part as an axis. [E20] A lid-equipped container, comprising: the lid described in any one of [E1] to [E19] above, and the container having the opening formed at an upper end and the edge part that forms the outer periphery of the opening, and the lid joined to the container. [E21] A combination of a lid and a container, comprising the lid described in any one of [E1] to [E19] above, and the container having the opening formed at an upper end and the edge part that forms the outer periphery of the opening.

[0314] The present invention also encompasses the following technical ideas: (F1) A lid used on a container having a mouth and a rim surrounding the mouth, with a joint region attached to the rim so as to cover the mouth, the lid having a main body including the joint region, the main body comprising a displacement facilitation structure configured to enable a portion of the main body to be displaced relative to another portion of the main body from an edge portion defined on the outer periphery of the main body toward the inside of the main body, whereby, when the portion of the main body is a first portion and the other portion of the main body is a second portion, the displacement facilitation structure has guide portions extending from each of a first end and a second end of the rim portion along the boundary between the first portion and the second portion, the guide portions traversing the joint region. (F2) The lid described in (F1) above, wherein the displacement facilitation structure further has a hinge portion continuous with the guide portion and formed inside the joint region, and when the first portion is displaced relative to the second portion, the first portion rises relative to the second portion around the hinge portion as an axis. (F3) The lid according to (F1) or (F2) above, wherein the first portion has a shape tapering from the edge portion toward the inside of the main body. (F4) The lid according to any one of (F1) to (F3) above, wherein the main body is provided with a protrusion that protrudes outward from the edge portion. (F5) The lid according to (F4) above, wherein the displacement facilitation structure has a hinge portion that is continuous with the guide portion and formed inside the joint area, the protrusion has a claw portion inside the protrusion, the second portion has a receiving portion, and when the first portion is folded back toward the upper surface of the second portion around the hinge portion as an axis, the claw portion and the receiving portion face each other. (F6) The displacement facilitation structure has a hinge portion continuous with the guide portion and formed inside the joint area, the second portion has a receiving portion, and when the first portion is displaced relative to the second portion, it displaces integrally with the first portion, and when the first portion is folded back toward the upper surface of the second portion around the hinge portion as an axis, the protrusion displaces to a position where it can be inserted into the receiving portion, a lid body as described in (F4) above.(F7) A lid body described in any one of (F1) to (F6) above, wherein when the guide portions extending from the first end and the second end of the edge portion along the boundary between the first portion and the second portion are defined as a first guide portion and a second guide portion, respectively, the length of the portion of the first guide portion that overlaps the joining area is different from the length of the portion of the second guide portion that overlaps the joining area. (F8) The lid according to any one of (F1) to (F6) above, wherein the guide portions extending from the first end and the second end of the edge portion along the boundary between the first portion and the second portion are defined as a first guide portion and a second guide portion, respectively, wherein the first guide portion has a first outer guide portion formed by a portion from the first end to an inner edge of the joining region, and a first inner guide portion excluding the first outer guide portion, the second guide portion has a second outer guide portion formed by a portion from the second end to the inner edge of the joining region, and a second inner guide portion excluding the second outer guide portion, and at least one of the first inner guide portion and the second inner guide portion is formed along the inner edge of the joining region. (F9) The lid according to any one of (F1) to (F8) above, wherein the guide portion has a notched structure or a weakened structure. (F10) The lid described in any one of (F1) to (F9) above, wherein the displacement facilitation structure is formed so that the entire first portion can be separated from the second portion. (F11) The lid described in any one of (F1) to (F10) above, wherein the displacement facilitation structure forms a protruding curved portion in the guide portion that curves so as to protrude from the first portion toward the second portion. (F12) The lid described in any one of (F1) to (F11) above, wherein at least the second portion has a recessed portion formed inside the bonding region by recessing a non-forming surface of the bonding region, and when a position on the inner edge of the bonding region farthest from the edge portion is set as a reference position, the recessed portion has an inclined surface that slopes downward from the reference position toward the first portion. (F13) The lid described in any one of (F1) to (F11) above, wherein a groove is formed inside the bonding region by recessing a non-forming surface of the bonding region. (F14) The lid according to (F13) above, wherein the groove extends in a curved line across the first portion.(F15) The lid according to (F13) or (F14) above, wherein the groove is formed in an annular shape. (F16) The lid according to any one of (F13) to (F15) above, wherein an inner region of the body that is more inward than the groove is positioned higher than an outer region of the body that is more outward than the groove. (F17) The lid according to any one of (F13) to (F16) above, wherein a plurality of the grooves are formed concentrically. (F18) The lid according to any one of (F13) to (F17) above, wherein the depth of the groove gradually increases from a position away from the first portion toward the first portion along the extension direction of the groove. (F19) A lidded container comprising: a container having an opening; and the lid according to any one of (F1) to (F18) above, wherein a joining portion is formed to join an edge of the opening of the container and a joining region of the lid. (F20) The container with lid according to (F19) above, wherein the joint is formed by a crimping method or a heat fusion method. (F21) A combination of a lid and a container, comprising a container having an opening and the lid according to any one of (F1) to (F18) above.

[0315] Furthermore, the present invention also encompasses the following technical ideas. (G1) A lid body that is formed so as to be able to form a joining area that is joined to an upper edge portion that is formed from a portion outside the edge of the opening of a container, and that comprises a main body having a portion that corresponds to the joining area, wherein the main body has a first portion defined as a portion that is rotated upward to expose the opening when the main body is joined to the edge of the opening of the container, and a second portion excluding the first portion, and a boundary portion between the first portion and the second portion in a non-rotating state in which rotation of the first portion relative to the second portion is restricted has a hinge portion that serves as a rotation axis of the first portion when forming an upward displacement state that is defined as a state in which the first portion is rotated upward relative to the second portion, and a guide portion that determines a position at which separation of the first portion and the second portion is intended to occur when the upward displacement state is formed, and the main body is configured so as to be able to form a downward displacement state that is defined as a state in which the first portion is pushed downwardly relative to the second portion, with the hinge portion as the rotation axis. (G2) The lid described in (G1) above, wherein at least one end of the hinge portion is formed in a position overlapping the joining area in a plan view of the main body. (G3) The lid described in (G1) or (G2) above, wherein the main body has an annular outer portion having a portion corresponding to an outer area from an inner edge of the joining area, and an inner portion formed in a portion more inward than the outer portion, and at least a portion of the guide portion is formed in the inner portion. (G4) The lid described in (G3) above, wherein, when the main body is joined to the upper edge of the container, the outer portion is located outward from the edge of the opening in a plan view of the main body. (G5) The lid described in any one of (G1) to (G4) above, wherein, when the main body is joined to the upper edge of the container, at least one end of the hinge portion is located outward from the edge of the opening in a plan view of the main body.(G6) The lid described in any one of (G1) to (G5) above, wherein, when the main body is joined to the upper edge portion of the container, in the non-rotatable state, the guide portion is formed so as to move away from a portion corresponding to the joining area as it moves away from the boundary between the hinge portion and the guide portion along the extension direction of the guide portion in a plan view of the main body. (G7) The lid described in any one of (G1) to (G6) above, wherein a tab member is joined to the first portion. (G8) The lid described in (G7) above, wherein, in a plan view of the main body, a tab joining portion defined as the joining portion between the tab member and the first portion is formed at a position closer to the front end of the guide portion than the hinge portion. (G9) The lid described in (G7) or (G8) above, wherein one end of the tab member is joined to the first portion, and the tab member forms a knob portion at the other end of the tab member. (G10) The lid described in (G9) above, wherein the other end of the tab member is located closer to the center of the main body than the one end of the tab member. (G11) The lid described in any one of (G7) to (G10) above, wherein the tab member has a locking portion. (G12) The lid described in (G11) above, wherein the second portion has a locking receiving portion formed in a shape capable of receiving the locking portion. (G13) The lid described in any one of (G1) to (G6) above, wherein the main body has an extension portion extending outward from a part of the outer periphery of the main body, and a part of the first portion traverses the joining region and is connected to the extension portion. (G14) The lid described in (G13) above, wherein, when the main body is joined to the upper edge portion of the container, in a plan view of the main body, the first portion has a folding assist portion formed at a position from the extension portion toward the hinge portion and at a position more inward than the edge of the opening. (G15) The lid described in any one of (G1) to (G14) above, wherein the main body is formed from a sheet material made of a resin material. (G16) The lid described in any one of (G1) to (G15) above, wherein the container is formed so that the opening diameter decreases downward from the opening.(G17) The lid described in any one of (G1) to (G16) above, wherein the container has a flange portion at the upper edge. (G18) The lid described in any one of (G1) to (G17) above, wherein the guide portion of the first portion contacts the inner circumferential surface of the container in the downward displacement state. (G19) A lidded container comprising: a container having the opening and an upper edge formed by a portion outer than the edge of the opening; and the lid described in any one of (G1) to (G18), wherein a joint is formed to join the upper edge of the container and the joint area of ​​the lid. (G20) The lidded container described in (G19) above, wherein the joint is formed by crimping or heat sealing. (G21) The lidded container described in (G19) or (G20) above, wherein the container is formed so that the opening diameter decreases downward from the opening. (G22) The container with lid described in any one of (G19) to (G21) above, wherein the container has a flange portion at the upper edge. (G23) The container with lid described in any one of (G19) to (G22) above, wherein the guide portion of the first portion contacts the inner peripheral surface of the container in the downward displacement state. (G24) A combination of a lid and a container, comprising a container having the opening and an upper edge formed by a portion outside the edge of the opening, and the lid described in any one of (G1) to (G18) above.

[0316] The present invention also encompasses the following technical idea: (H1) A lidded container comprising: a container having an opening formed at an upper end; and a lid attached to the container and covering the opening, wherein the container has an edge surrounding the opening and a joint joining the container and the lid along the edge, the lid having a main body forming a small opening with a smaller opening area than the opening inside a portion corresponding to the joint in a plan view of the lid, a small lid covering the small opening in an openable and closable manner, and a hinge connecting the small lid to the main body in a rotatable manner, wherein the joint has at least a wide portion and a narrow portion narrower than the wide portion as portions having different widths, and when a half line starting from the center of the lid and intersecting the wide portion is imagined in a plan view of the lid with the small opening covered, at least one of the half lines intersects the small lid. (H2) The container with lid described above in (H1), wherein the joint portion has at least the wide width portion and the narrow width portion that is connected to two ends of the wide width portion and is narrower than the wide width portion, as at least portions having different widths from each other. (H3) The container with lid described above in (H1) or (H2), wherein the main body portion of the lid is formed from a sheet material made of a resin material. (H4) The container with lid described above in any of (H1) to (H3), wherein, in a state where the small opening is covered with the small lid portion, the center of the hinge portion is formed at a position off of a line among the half straight lines that starts from the center of the lid and passes through the center of the wide width portion along the longitudinal direction of the wide width portion, among the half straight lines. (H5) The container with lid described above in any of (H1) to (H4), wherein a tab member is provided on the small lid portion of the lid.

[0317] The present invention also encompasses the following technical idea: (I1) A lid having a joining region to be joined to the periphery of a mouth of a container, the lid comprising: a main body having an opening and shaped to cover the mouth when joined to the container; a small lid piece covering the opening; and a tab member, wherein the small lid piece is connected to the main body at at least a portion of the outer periphery of the small lid piece and is formed so as to be displaceable when pulled up relative to the main body, so that the opening is exposed when the small lid piece is pulled up, the tab member having a first portion joined to the small lid piece and a second portion joinable to the main body when the small lid piece is pulled up, wherein if the portion where the first portion and the small lid piece are joined is a first joining portion and the portion where the second portion and the main body are joined is a second joining portion, the strength of the bond between the second portion and the main body at the second joining portion is smaller than the strength of the bond between the first portion and the small lid piece at the first joining portion. (I2) A combination of a container and a lid, comprising a container having a mouth and the lid described in (I1) above. (I3) A lidded container, comprising a container having a mouth and the lid described in (I1) above, wherein the mouth of the container is covered with the lid.

[0318] DESCRIPTION OF SYMBOLS 1: Lid body 2: Main body 2A: Outer peripheral edge 3: Small lid portion 3A: Outer peripheral edge 4: Opening forming portion 5: Joint area corresponding portion 6: Small opening 6G: Opening edge 7: Hinge portion 7A: End portion 8: Cut portion 10: Margin portion 10A: First margin portion 10B: Second margin portion 11A: Tip portion 11B: First protrusion portion 12: Bending assist portion 13: Protruding portion 14: Protruding curved portion 15A: First portion 15B: Second portion 16: Half-cut portion 17: Connecting structure 18A: Continuous portion 18B: Cut portion 19: Inclined portion 20: Receiving portion 21: Fixing structure forming portion 23: Holding portion 24: Grip portion 26 : Insertion portion 30 : Retention structure forming portion 31 : Tab member 31A : One end portion 31B : Other end portion 32 : Claw portion 33 : Receiving portion 34 : Tab joint portion 35 : Overlapping portion 72 : Outer portion 73 : Inner edge portion 74 : Hinge connection portion 75 : Front edge portion 76 : Side edge portion 101 : Container 102 : Opening portion 103 : Edge portion 104 : Side wall 105 : Space portion 107 : Side wall portion 108 : Flange portion 110 : Container body 150 : Container with lid 151 : Joint portion CT : Center F : Arrow M : Line segment ME : Extension line R : Joint area S1 : Part S11 : Part S12 : Part S2 : Part SB1 : Predetermined position SB2 : Corresponding position XS : Area

Claims

1. A lid body, the lid body being formed so as to be joinable to a container having an opening formed at an upper end and an edge forming the outer periphery of the opening, the lid body comprising: a base portion having a joining area corresponding to an area to be joined to the container along the edge of the container and a small opening having an opening area smaller than the opening of the container; a small lid portion for opening and closing the small opening; and a hinge portion connecting the base portion and the small lid portion, the small lid portion being configured so as to be rotatable relative to the base portion with the hinge portion as an axis, the lid portion having a canopy portion extending outward from the opening edge of the small opening in a plan view of the base portion.

2. The lid according to claim 1, wherein the eaves portion is a margin portion defined as a portion that satisfies the following conditions 1 and 2. Condition 1: In a plan view of the base portion, the margin portion is a portion that is formed inward from the inner edge of the portion of the base portion that corresponds to the joint area and outward from the opening edge of the small opening. Condition 2: In a plan view of the base portion, when a line segment connecting the margin portion and the hinge portion is imagined, the line segment passes through the opening edge of the small opening.

3. The lid according to claim 2, wherein an area of ​​the margin portion in a plan view of the base portion is smaller than an area of ​​the small opening portion.

4. The lid according to claim 2, wherein the margin portion is formed so that an inner edge of the margin portion and an outer edge of the margin portion are non-concentric.

5. The lid according to claim 2, wherein the margin portion has an inclined portion that slopes downward from the outer edge of the margin portion toward the inner edge of the margin portion.

6. The lid body according to claim 1, wherein a knob is provided on the upper surface side of the small lid portion.

7. The lid body according to claim 6, wherein the knob portion has a tab member, and the tab member is joined to the upper surface side of the small lid portion.

8. The lid according to claim 7, wherein when said small lid portion closes said small opening, a part of said tab member intersects with said opening edge of said small opening in a plan view of said base portion.

9. A lid body as described in claim 6, further comprising a retaining structure forming part which holds the small lid part in a state in which the small opening is open by rotating the small lid part relative to the base part around the hinge part as an axis, wherein the knob part is provided with a claw part, and the base part is provided with a receiving part at a position which contacts the claw part, and wherein the claw part and the receiving part form the retaining structure forming part.

10. The lid according to claim 1, wherein an extension is formed on the outer peripheral edge of the base.

11. A lid body as described in claim 10, further comprising a retaining structure forming part that holds the small lid portion in a state in which the small opening is open by rotating the small lid portion relative to the base portion around the hinge portion as an axis, a knob portion is provided on the upper surface side of the small lid portion, a claw portion is provided on the knob portion, and the extension portion and the claw portion form the retaining structure forming part.

12. The lid body according to claim 10 or 11, wherein the hinge portion is formed between the extension portion and the tip of the small lid portion.

13. The lid according to claim 1, wherein a recess is formed in an inner portion of the joint area corresponding portion.

14. The lid body according to claim 1, wherein a protruding portion is formed on the outer peripheral edge of the small lid portion, and a recessed portion corresponding to the protruding portion is formed on the opening edge of the small opening.

15. The lid body according to claim 1, wherein a recess is formed on the outer peripheral edge of the small lid portion, and a convex portion corresponding to the recess is formed on the opening edge of the small opening.

16. A lid body as described in claim 1, wherein a connection structure is formed that connects the outer peripheral edge of the small lid portion and the opening edge of the small opening, the connection structure being a weak part that is weaker than the small lid portion, and the weak part is destroyed when the small lid portion rotates relative to the base portion around the hinge portion as an axis.

17. The lid according to claim 16, wherein the fragile portion has a combined structure of a connecting portion and a slit, and / or a half-cut structure.

18. The lid according to claim 1, which is formed from a sheet material made of a resin material.

19. A container with a lid, comprising: the lid according to claim 1; and a container having an opening formed at an upper end and an edge portion forming an outer periphery of the opening, the lid being joined to the container.

20. A lid-container combination comprising: the lid of claim 1; and the container having the opening formed at an upper end and the edge forming an outer periphery of the opening.

Images