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

Abstract

To provide a lid body to enable easy and hygienic opening / closing of a drinking spout of the lid body.SOLUTION: The lid body is formed to be able to open and close a mouth portion of a container, and includes a top surface portion formed to cover the mouth portion when the lid body is closed. The top surface portion includes a small lid piece and an opening portion formed when the small lid piece is pulled up. A joint portion joined to one end of a tab member is formed on the tip side of the small lid piece, the tab member having a knob portion formed at the other end.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] It has been common practice to serve food and beverages in containers with the lid closed. In recent years, convenience stores, for example, have also widely served beverages such as coffee in the new format described above. When the food and beverage (hereinafter also referred to as "contents") contained in the container is a beverage such as coffee, the purchaser picks up the container with the lid on and tilts the container to drink the contents. Therefore, it is common for the lid to have an opening, also known as a drinking spout, so that the contents flow out of the container when the container is tilted. However, simply having an opening for the drinking spout poses a risk of dust and other particles entering the container through the opening, and is not necessarily hygienic. Therefore, it is common for the lid to be configured so that the drinking spout is closed before use and is only opened when the user drinks the contents.

[0003] Examples of such lids include those disclosed in Patent Document 1 and Patent Document 2 shown below. The lid disclosed in Patent Document 1 has a side wall and a canopy portion, and a tab is formed on the canopy portion. This lid is configured so that when a user pinches and pulls up the tab, a bell- or gourd-shaped hole opens, forming a drinking spout. Furthermore, the beverage cup lid disclosed in Patent Document 2 has an opening (drinking spout) formed on the top surface (canopy portion), and is provided with a small lid that opens and closes this opening. Furthermore, this small lid is provided with a protrusion, and is configured so that the protrusion of this small lid fits into a recess in the top surface, thereby maintaining the small lid in an open state. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2016 / 069755 [Patent Document 2] Japanese Patent Application Laid-Open No. 2008-062952 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the lids disclosed in the above-mentioned Patent Documents 1 and 2 have the problem that the actions of directly gripping the tab or small lid to open the drinking spout, inserting the tab into the tab hole, and fitting the convex portion of the small lid into the concave portion of the top surface cannot be performed smoothly, making the action of opening the drinking spout extremely difficult. While this problem could be solved by improving the structure and shape of the lid itself, this would pose another problem, as the structure and shape of the lid itself would have to be complex. Furthermore, because the tab or the convex portion that serves as the handle is formed directly on the top portion of the lid, the user must directly touch the lid when opening the drinking spout, which creates hygiene issues. Furthermore, with these conventional lids, once the drinking spout is opened, the tab or small lid must be touched with the fingers to close it again. Therefore, after closing the drinking spout, the surface touched by the fingers is positioned on the side that comes into contact with the beverage, which also creates an unhygienic problem.

[0006] The present invention has been made in consideration of these problems, and aims to provide a lid, a combination of a container and a lid, and a container with a lid, which allow the drinking spout of the lid to be opened and closed easily and hygienically. [Means for solving the problem]

[0007] The present invention is summarized as follows (1) to (25). (1) A lid body comprising: a top surface portion formed in a shape that covers the mouth of a container, the top surface portion having a small lid piece and an opening that is formed when the small lid piece is pulled up; and a tab member joined to the small lid piece, the tab member having one end portion, the other end portion, a knob portion formed at the other end portion, and a retaining piece formed between the one end portion and the other end portion and formed to protrude by operating the tab member, the small lid piece having a joining portion that joins with the tab member, and the top surface portion having an outer periphery, a portion corresponding to a joining area that joins with an edge portion formed on the periphery of the mouth, a knob formed outward from the outer periphery, an opening that is formed when the small lid piece is pulled up, and an insertion portion into which the protruding retaining piece is inserted. (2) The lid body described in (1) above, wherein the knob is marked. (3) The lid according to (2) above, wherein the markings are formed by printing. (4) The lid according to (2) above, wherein the markings are formed by projections and recesses. (5) The lid according to (2) above, wherein the marking is formed by a cutout. (6) The lid body according to (1) above, on which a label is formed. (7) The lid body according to (6) above, wherein the label is formed near the tab. (8) The lid body according to (6) above, in which a plurality of the labels are formed. (9) The lid body according to (6) above, wherein the label is formed so as to be able to be folded along the outer peripheral edge. (10) The lid body according to (6) above, wherein the label has a folding portion formed thereon to make it easier to fold the label. (11) The lid according to (1) above, wherein a window is formed inside the joint area corresponding portion. (12) A lid body as described in (1) above, having an inner region corresponding to the inside of the joint region corresponding portion, in which an opening and a small lid piece for opening and closing the opening are formed, the small lid piece having one end and the other end, the one end being formed to be a free end and the other end being formed to be a fixed end, and the knob being formed in a portion including the position farthest from the one end. (13) An inner region of the joining region corresponding portion, a small lid piece formed in the inner region, and an opening formed when the small lid piece is lifted up; One end and other end and One end A joining portion to be joined to the small lid piece is formed on the other end and a tab member having a tab portion formed in the inner region, the tab member having a holding piece formed between the joint portion and the tab portion, and protrusion The lid body described in (1) above is formed with an insertion portion into which the retaining piece is inserted, and is configured so that the retaining piece can be inserted into the insertion portion to pull up the small lid piece and maintain the opening in an open state. (14) The lid body according to (13) above, wherein the holding piece is formed so as to protrude from the tab member when the knob portion is pinched and the small lid piece is pulled up. (15) The lid body according to (13) above, wherein the knob portion is formed so as to stand up when the holding piece is inserted into the insertion portion. (16) The lid body according to (13) above, wherein the holding piece is formed so as to protrude from the knob side toward the joint side. (17) The lid body according to (13) above, wherein the insertion portion has a main portion into which the holding piece is inserted and an auxiliary portion that intersects with the main portion. (18) The lid body according to (13) above, wherein the tab member has a pattern on the gripping portion that resembles a human face. (19) The lid body according to (18) above, wherein the pattern changes three-dimensionally before and after the holding piece is protruded. (20) A lid body as described in (13) above, which has an exposed surface when joined to the container, and at least a portion of the outer peripheral edge of the small lid piece extends along the inner edge of the joining area corresponding portion, and is formed outside the intersection position of the exposed surface when joined to the container and the extension surface of the inner peripheral surface of the container. (21) A lid body as described in (13) above, which has a facing surface that faces the outer peripheral end surface of the small lid piece when the small lid piece is closed, and when the small lid piece is opened, at least a portion of the outer peripheral end surface rubs against the facing surface. (22) The lid according to (1) above, wherein at least a part of the top surface has a raised portion inside the joint area corresponding portion. (23) The above-mentioned (1) is made of a paper-based material. Lid . (24) A combination of a container and a lid, comprising a container having a mouth and the lid described in any one of (1) to (23) above. (25) A container with a lid, comprising a container having a mouth and the lid described in any one of (1) to (23) above, wherein the mouth is covered with the lid. [Effects of the Invention]

[0008] According to the present invention, the small lid piece joined to the tab member can be easily opened by pinching and pulling up the tab member's tab tab. Furthermore, if the tab member has a holding piece and an insertion portion formed on the top surface, the small lid piece can be kept open, i.e., the opening formed by the opening, by pinching the tab member's tab and pulling up the small lid piece while inserting the holding piece formed on the tab member into the insertion portion formed on the top surface. Therefore, with the lid body according to the present invention, the user can open the opening without directly touching the small lid piece. Furthermore, according to the present invention, if the tab member has a holding piece and an insertion portion formed on the top surface, the user can smoothly keep the small lid piece open, making it easy to open and close the small lid piece. Furthermore, with the lid body according to the present invention, the user can drink the contents while maintaining a highly hygienic state. Furthermore, when closing the opening again, the small lid piece can be closed by operating the tab member, which reduces the chance of the user's fingers coming into contact with deposits that tend to adhere to the small lid piece due to steam, etc., and makes it possible to reduce the likelihood of the user feeling uncomfortable. Furthermore, since the small lid piece can be opened and closed simply by operating the tab member, the user does not find the operation cumbersome and can use it comfortably. [Brief explanation of the drawings]

[0009] [Figure 1] 1(a) and 1(b) are external perspective views showing an embodiment (first embodiment) of the lid of the present invention. [Figure 2] FIG. 2 is a perspective view of the appearance of the lid body, illustrating the operation of opening the small lid piece. [Figure 3] 3(a) and 3(b) are external perspective views showing the lid body with the opening open. [Figure 4] FIG. 4 is a plan view showing the cover body with the small cover pieces closed. [Figure 5] FIG. 5 is a plan view showing the cover with the small cover piece in an open state. [Figure 6] Fig. 6(a) is a vertical cross-sectional view taken along line AA in Fig. 1(a), and Fig. 6(b) is a partially enlarged view of Fig. 6(a). [Figure 7] 7(a) and 7(b) are explanatory views for explaining the structure and function of the tab member. [Figure 8] 8(a), 8(b), and 8(c) are explanatory diagrams for explaining the operation of opening the small lid piece. [Figure 9] FIG. 9 is an explanatory diagram for explaining a state in which the lid body is attached to the container. [Figure 10] FIG. 10 is an explanatory diagram for explaining the effect when the lid body is attached to the container. [Figure 11] FIG. 11 is an explanatory diagram showing the state in which the lids are stacked. [Figure 12] 12(a) to 12(g) are explanatory views for explaining other embodiments of the small lid pieces. [Figure 13] 13(a) and 13(b) are an external perspective view and a vertical cross-sectional view showing a first modified example of the lid according to the present embodiment. [Figure 14] 14(a) to 14(e) are explanatory diagrams showing the configuration of other modes of the lid body. [Figure 15] 15(a) to 15(d) are explanatory diagrams showing the configuration of other modes of the lid body. [Figure 16] 16(a) to 16(e) are explanatory diagrams showing the configuration of other modes of the lid body. [Figure 17] 17(a) to 17(e) are explanatory diagrams showing the configuration of other modes of the lid body. [Figure 18] 18(a) to 18(d) are explanatory diagrams showing the configuration of other modes of the lid body. [Figure 19] 19(a) to 19(e) are explanatory diagrams showing the configuration of other modes of the lid body. [Figure 20] 20(a) and 20(b) are explanatory views showing the configuration of another embodiment of the lid body. [Figure 21]FIG. 21 is a perspective view showing the configuration of another embodiment of the lid body. [Figure 22] FIG. 22 is an external perspective view for explaining another embodiment of the insertion portion of the lid. [Figure 23] Figure 23(a) is an external perspective view for explaining another embodiment of the insertion portion of the lid, and Figure 23(b) is an external perspective view showing the configuration of another embodiment of the lid. [Figure 24] Figure 24(a) is a plan view showing the configuration of a lid having a tab member of another embodiment, and Figure 24(b) is a perspective view showing the appearance of the lid shown in Figure 24(a). [Figure 25] Figure 25(a) is a plan view showing the configuration of a lid having a tab member of another embodiment, and Figure 25(b) is a perspective view showing the appearance of the lid shown in Figure 25(a). [Figure 26] Figure 26(a) is a plan view showing the configuration of a lid having a tab member of another embodiment, and Figure 26(b) is a perspective view showing the appearance of the lid shown in Figure 26(a). [Figure 27] FIG. 27 is an external perspective view showing the configuration of a lid body having a tab member according to another embodiment. [Figure 28] Fig. 28(a) is a plan view illustrating an example of a lid according to the second embodiment of the present invention, and Fig. 28(b) is a vertical cross-sectional view taken along line BB in Fig. 28(a). [Figure 29] FIG. 29 is a plan view for explaining an example of the lid according to the second embodiment of the present invention. [Figure 30] Fig. 30(a) is a plan view illustrating an example of a lid according to the second embodiment of the present invention, and Fig. 30(b) is a vertical cross-sectional view taken along line CC in Fig. 30(a). [Figure 31] FIG. 31 is a plan view illustrating an example of a lid according to the second modification of the second embodiment of the present invention. [Figure 32] FIG. 32 is a cross-sectional view of a main part for explaining an example of the lid according to the second embodiment of the present invention. [Figure 33]Fig. 33(a) is a plan view illustrating an example of a lid according to Modification 1 of the second embodiment of the present invention, and Fig. 33(b) is a vertical cross-sectional view taken along line DD in Fig. 33(a). [Figure 34] 34(a) and 34(b) are plan views for explaining an example of a lid according to the third modification of the second embodiment of the present invention. [Figure 35] FIG. 35 is a cross-sectional view of a main part for explaining one example of the lid according to the second embodiment of the present invention. [Figure 36] FIG. 36 is a cross-sectional view of a main part for explaining one example of the lid according to the second embodiment of the present invention. [Figure 37] Fig. 37(a) is a plan view illustrating an example of a lid according to Modification 4 of the second embodiment of the present invention, and Fig. 37(b) is a vertical cross-sectional view taken along line EE in Fig. 37(a). [Figure 38] FIG. 38 is a cross-sectional view showing one embodiment of a container with a lid. [Figure 39] FIG. 39 is a plan view illustrating an example of the lid according to the second embodiment of the present invention. [Figure 40] Fig. 40(a) is a cross-sectional view illustrating one example of the lid according to the second embodiment of the present invention, and Fig. 40(b) is a partially enlarged view of the area indicated by X in Fig. 40(a). [Figure 41] Fig. 41(a) is a plan view illustrating an example of a lid according to Modification 5 of the second embodiment of the present invention, and Fig. 41(b) is a vertical cross-sectional view taken along line FF in Fig. 41(a). [Figure 42] FIG. 42 is a cross-sectional view showing one embodiment of a container with a lid. [Figure 43] FIG. 43 is a cross-sectional view showing one embodiment of a container with a lid. [Figure 44] FIG. 44 is a cross-sectional view showing one embodiment of a container with a lid. [Figure 45] 45(a) and 45(b) are plan views for explaining an example of a lid according to the second modification of the second embodiment of the present invention. [Figure 46]Fig. 46(a) is a plan view illustrating an example of a lid according to Modification 6 of the second embodiment of the present invention, and Fig. 46(b) is a cross-sectional view illustrating an example of a lid according to Modification 6 of the second embodiment of the present invention. [Figure 47] FIG. 47 is a plan view for explaining one embodiment of the lid of the present invention. [Figure 48] FIG. 48 is a plan view for explaining one embodiment of the lid of the present invention. [Figure 49] 49(a) and 49(b) are plan views for explaining one embodiment of the lid of the present invention. [Figure 50] 50(a) and 50(b) are explanatory views for explaining an example of the lid according to the second embodiment of the present invention. [Figure 51] FIG. 51 is a plan view illustrating an example of a lid according to the seventh modification of the second embodiment of the present invention. [Figure 52] FIG. 52 is an explanatory diagram for explaining one example of a lid according to the eighth modified example of the second embodiment of the present invention. [Figure 53] Figure 53(a) is a plan view showing the configuration of a lid body having a tab member of another embodiment, and Figure 53(b) is a diagram explaining an example of use of the lid body having the tab member shown in Figure 53(a). [Figure 54] FIG. 54 is a plan view showing the configuration of a lid having a tab member in another embodiment. [Figure 55] 55(a) is a plan view for explaining an example of use of the lid shown in FIG. 54, and FIG. 55(b) is a vertical cross-sectional view taken along line HH in FIG. 55(a). [Figure 56] FIG. 56 is a plan view illustrating an example of a lid according to a modified example of the second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0010] The lid according to the present invention will be described in detail below with reference to the drawings. The lid according to 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 container for holding beverages, and can also be applied to a container for holding food products other than beverages. The lid according to the present invention can also be applied to a container for holding various items other than food and beverages, such as parts such as bolts and nuts, or items other than the above-mentioned parts. Furthermore, the lid according to 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 lid is not limited to a circular shape when viewed from above. It can also be applied to lids of various shapes other than circles, such as ovals, polygons such as rectangles and triangles, chamfered rectangles, and chamfered polygons.

[0011] In the following description, a lid that can be fitted onto a container will be described as a first embodiment, and a lid that does not fit onto a container will be described as a second embodiment. In this specification, components that have substantially similar features even in different embodiments will be indicated by the same reference numerals, and detailed descriptions of those components will be omitted.

[0012] (First embodiment) As shown in Figures 1 to 6, the lid 1 according to the first embodiment includes a top portion 2 and a side wall 3. The side wall 3 is formed into a cylindrical or annular shape by joining both ends of a paper-based material. The side wall 3 has an upper wall 5 and a lower wall 6. The side wall 3 is tapered from the upper end 3b toward the lower end 3c. Here, the term "tapered" means that the outer wall 3a of the side wall 3 is tapered from the upper end 3b to the lower end 3c. This "tapered" shape includes a shape in which the outer wall 3a of the side wall 3 gradually decreases in size from the upper end 3b to the lower end 3c, as well as a shape in which the outer wall 3a of the side wall 3 has a bulge or protrusion that increases in size, or a shape in which the outer wall 3a of the side wall 3 is tapered overall even if such a bulge or protrusion is formed. When the outer wall 3a of the side wall 3 gradually decreases in size from the upper end 3b to the lower end 3c, the outer wall 3a of the side wall 3 may gradually decrease in size in a linear manner from the upper end 3b to the lower end 3c, or may gradually decrease in size in a curved manner, or may have a step 3d (see FIG. 6, etc.) between the upper end 3b and the lower end 3c. Furthermore, even if a portion of the side wall 3 has a straight cylindrical or annular shape that is not tapered, a shape in which the outer wall 3a of the side wall 3 is tapered as a whole is also included in this "tapered shape." In other words, the "tapered shape" here is a concept that includes an embodiment in which a portion of the outer wall 3a is formed in a shape other than a tapered shape as long as the shape of the outer wall 3a of the side wall 3 is tapered as a whole.

[0013] The canopy 2 has a top surface 2a and a rising portion 4. The top surface 2a is the main body of the canopy formed in the center of the canopy 2, and is sized and shaped so that when the mouth 102 of the container 101 is closed, it comes into contact with at least a portion of the edge 103 formed around the mouth 102, thereby covering the mouth 102, as shown in FIG. 9 . The top surface 2a has a main body 2a1 having an opening 12, and a small lid piece 13. The small lid piece 13 is formed to be openable and closable. When attached to the container 103, the top surface 2a is located above the mouth 102, and the main body 2a1 and the small lid piece 13 cover the mouth 102. The rising portion 4 is formed on the periphery of the top surface 2a and is formed to rise upward from the periphery of the top surface 2a. The top surface portion 2a and the rising portion 4 may be formed separately, but are preferably formed integrally from the viewpoints of manufacturing efficiency and airtightness of the lid body 1. When the top surface portion 2a and the rising portion 4 of the canopy portion 2 are formed integrally, any conventionally known method can be used, but from the viewpoint of ease of forming the canopy portion 2, it is preferable to form the top surface portion 2a and the rising portion 4 by bending. In other words, the rising portion 4 is preferably formed by bending the periphery of the top surface portion 2a.

[0014] The canopy 2 and the side wall 3 are integrated by joining the outer surface 4b of the rising portion 4 of the canopy 2 to the inner surface 5a of the upper wall 5 of the side wall 3. As shown in FIG. 9 , an engagement portion 7 is formed on the inner surface 6a of the lower wall 6 of the side wall 3, shaped to engage with a rim 103 (a curled portion in FIG. 9 ) provided on a mouth 102 formed on a container 101. The engagement portion 7 can be formed in any shape as long as it can engage with the rim 103 of the container 101. For example, it can have a linear tapered shape as shown in FIG. 1 , or the engagement portion 7 can be formed by bulging the lower wall 6 to match the shape of the rim 103. Alternatively, the engagement portion 7 can be formed by forming a protrusion that protrudes inward on the inner surface 6a of the lower wall 6, or the protrusion described above can be formed as part of the engagement portion 7. In this way, when forming the engaging portion 7 by forming a protrusion that protrudes inward on the inner surface 6a side, the protrusion may be formed continuously on the inner surface 6a, or the protrusion may be formed intermittently by alternately forming portions with and without protrusions. Furthermore, when the protrusions are formed intermittently, the size and length of the protrusions of each protrusion may be the same or different.

[0015] The engaging portion 7 may be formed by pressing the inner circumferential surface of the lower wall 6 of the side wall 3. In particular, when the engaging portion 7 is formed in the shape of an annular recessed groove, pressing the inner circumferential surface of the lower wall 6 can reduce the step at the joint of the engaging portion 7 formed in the lower wall 6 of the side wall 3, which is formed by joining both ends of a rectangular or fan-shaped paper-based material, making it less likely that a gap will form between the lid 1 and the container 101, improving the airtightness of the lid 1 when closed.

[0016] In the lid 1 according to this embodiment, the side wall 3 is formed into a cylindrical or annular shape by joining both ends of a sector-shaped blank (not shown) in which the arc length at the upper end 3b is longer than the arc length at the lower end 3c. Therefore, the side wall 3 is formed so that the side surface is generally tapered (i.e., generally inclined in the direction of arrow a in FIG. 6 ) from the upper end 3b toward the lower end 3c (toward the mouth 102 of the container 101), and the inner dimension of the lower end of the engaging portion 7 is smaller than the inner dimension of the upper end of the engaging portion 7.

[0017] The lid 1 according to this embodiment has a side wall 3 tapered from the upper end 3b toward the lower end 3c. This provides excellent stacking properties when multiple lids 1 are stacked together, as shown in FIG. 11 . That is, by stacking multiple lids 1 one above the other, the lid 1 according to this embodiment can be stored and transported in a small space, reducing storage and transport costs. The side wall 3 is not limited to a case in which the entire side surface of the outer wall 3a is inclined; only a portion of the side wall 3, such as the upper end 3b or the lower end 3c, may be inclined. Furthermore, the upper end 3b and the lower end 3c of the side wall 3 may be formed to have different inclination angles. Furthermore, the lid 1 according to this embodiment may have a non-inclined cylindrical or annular shape by forming the side wall 3 in a surrounding shape, i.e., a circular or cylindrical shape that surrounds the top surface 2a of the canopy 2, using a rectangular paper-based material. Furthermore, by constructing the sidewall 3 from an inverted fan-shaped blank made of a paper-based material, it is possible to achieve an inclination opposite to that shown in FIG. 11 , etc. However, it is preferable that the sidewall 3 be non-inclined or be inclined in a tapered shape that matches the inclination angle of the sidewall 104 of the container 101, as shown in FIG. 11 , etc. In particular, by forming the sidewall 3 so that the side surface of the outer wall 3a is annular or tubular, tapering from the upper end 3b to the lower end 3c, the stackability of the lids 1 when multiple lids 1 are stacked is improved. Furthermore, by forming the sidewall 3 as described above, it is possible to improve the closure and sealing of the container 101 when the lid 1 is fitted to the container 101 and the mouth 102 of the container 101 is closed. Note that, from the viewpoint of further improving the stackability of the lid 1, it is preferable to form a step 3d on the outer surface of the sidewall 3. By forming the step 3d on the outer surface of the side wall 3, it is possible to significantly reduce the possibility that the lower wall 6 of the lid body being stacked on top will intrude into the space surrounded by the upper wall 5 of the lid body 1 located below it, and that the intrusion of the lower wall 6 will be restricted by the inner surface of the upper wall 5. Therefore, when stacking multiple lid bodies 1, more lid bodies 1 can be stacked in a smaller space.This means that, for example, when the lid body 1 is stored in an object of a fixed height, such as a container or a packaging box, it is possible to increase the number of lid bodies 1 that can be stacked, which also makes it possible to reduce logistics costs, such as when transporting the lid body 1.

[0018] The joining of both ends of the blank material made of a paper-based material that forms the side wall 3 of the lid body 1, and the joining of the rising portion 4 and the side wall 3 of the canopy portion 2 can be carried out by a conventionally known joining method. Examples of joining methods include ordinary adhesives, hot melt adhesives, two-component adhesives, heat sealing, ultrasonic bonding, and high-frequency bonding, but from the perspective of manufacturing efficiency, it is preferable to form the joining surfaces of the rising portion 4 of the canopy portion 2 and the side wall 3 from a material that has heat sealing properties and join them by heat sealing.

[0019] Fig. 9 shows the state in which lid 1 has been placed on container 101 to seal opening 102 of container 101, and Fig. 10 shows the state in which lid 1 is in the process of being placed on container 101. Lid 1 according to this embodiment is formed so that engaging portion 7 engages with edge 103 of container 101. Lid 1 according to this embodiment is formed so that, when engaging portion 7 is engaged with edge 103 of container 101, lower end 8 of lower wall 6 does not come into contact with side wall 104 of container 101. Not only can lid 1 close container 101 with high sealing performance, but lid 1 can also be easily removed from container 101 because lower wall 6 is elastic. Furthermore, the lid 1 is structured so that the lower end 8 of the lower wall 6 does not come into contact with the side wall 104 of the container 101 when attached to the container 101. Therefore, when removing the lid 1 from the container 101, the rim 103 of the opening 102 of the container 101 and the engaging portion 7 of the lid 1 are disengaged by hooking the lower end 8 of the lower wall 6 with a finger or the like and pulling up the lower wall 6. Then, by further pulling up the lid 1, the lid 1 can be more easily removed from the container 101.

[0020] The lid 1 has a configuration in which an engagement portion 7 that engages with the mouth 102 of the container 101 is formed on the lower wall 6 of the side wall 3, which is formed from a paper-based material in a surrounding shape, i.e., a ring or a cylindrical shape. Furthermore, the lower wall 6 of the side wall 3 on which the engagement portion 7 is formed has superior elasticity compared to when the lower wall 6 of the side wall 3 is folded back and joined to the canopy 2. Therefore, even if the diameter of the engagement portion 7 of the lid 1 is designed to be smaller than the outer diameter of the edge 103 of the container 101, the lid 1 can be securely engaged with the container 101. Furthermore, by designing the diameter of the engagement portion 7 to be smaller than the outer diameter of the edge portion 103 of the container 101 in this way, even if the pressure inside the space portion 105 formed inside the container 101 increases due to the contents being filled with a liquid product such as coffee, especially a hot liquid product, there is no risk of the lid body 1 coming off easily, and the container 01 can be closed while maintaining a high level of airtightness. Combined with the fact that the side wall 3 is formed to be tapered overall from the upper end to the lower end, the lid can be closed with a high level of airtightness.

[0021] Furthermore, in the lid 1 according to the first embodiment, the lower wall 6 of the side wall 3 is elastic, so that the opening 102 of the container 101 can be reliably closed and highly airtight even if there is a dimensional error in the opening 102 of the container 101. Furthermore, the side wall 3 is tapered from the upper end 3b to the lower end 3c, and the rising portion 4 is joined to the inner surface 5a of the upper wall 5 of the side wall 3, thereby integrally joining the canopy portion 2 and the side wall 3. This increases the bond strength between the outer surface of the rising portion 4 of the canopy portion 2 and the inner surface of the upper wall 5 of the side wall 3. In particular, the lid 1 shown in FIG. 1 and other figures forms a folded portion 9 by folding the upper wall 5 of the side wall 3 back toward the inner surface 4a of the rising portion 4, and the inner surface 4a of the rising portion 4 is joined to the opposing surface 9a of the folded portion 9 that faces the inner surface 4a. This further increases the bond strength between the canopy portion 2 and the side wall 3. Therefore, even when a load force is applied to the lid body 1, the lid body 1 is less likely to twist, and there is no risk of the engagement between the engagement portion 7 and the edge portion 103 of the container 101 coming off.Even if the internal pressure of the sealed container 101 increases when a hot beverage or the like is placed inside, there is extremely little risk of the lid body 1 coming off the container 101.

[0022] Generally, the larger the canopy portion 2 of a lid 1, the more likely the canopy portion 2 is to twist due to a load on the lid 1. However, as in the lid 1 according to the first embodiment, the side wall 3 is formed with an inclination that tapers from the upper end 3b toward the lower end 3c, and a rising portion 4 formed in a flared and inclined manner is joined to the inner surface of the upper wall of the side wall 3. Furthermore, this rising portion 4 is joined to the folded portion 9. This reduces the risk of the lid 1 coming off the container 101 due to a load applied to the lid 1, even if the lid 1 is large. The lid 1 can be maintained in a securely closed state because the distance between the lower joint point 10 of the joint between the rising portion 4 of the canopy portion 2 and the upper wall 5 of the side wall 3 (the diameter of the lower joint point 10 in the case of a circular canopy portion 2) is larger than the distance between the lower ends 8 of the engagement portions 7 (the inner diameter of the lower ends of the engagement portions 7 in the case of a circular canopy portion 2). In the lid 1 according to this embodiment, the joint between the upper wall 5 of the side wall 3 and the rising portion 4 of the canopy 2 is formed as a protruding wall 121 on the upper side of the canopy 2. When the contents of the container 101 is a beverage such as coffee, this protruding wall can be used as a mouthpiece that the user places their mouth on when drinking the beverage, and can also be used as an overflow prevention wall to prevent the beverage from overflowing.

[0023] The container 101 is not limited to containers with a sloped sidewall 104, such as a coffee cup or a cup noodle container, but may also be a cylindrical container, such as a can of nuts. The lid 1 can be used for various containers, such as paper containers, plastic containers, foam plastic containers, and metal pipes, and is not limited to containers that hold liquids, but can also be used as a lid for containers that store dry foods and non-food containers. Furthermore, the lid 1 can be used as a lid for containers such as coffee cups, cup noodles, and canned nuts, as well as for containers for soup, yogurt, ice cream, various prepared foods, and boxed lunches, but it can be used as a lid for any container, not just containers for food and drink.

[0024] In the lid 1 of this embodiment, the side wall 3 is tapered from the upper end 3b to the lower end 3c. The inclination angle α of the side wall 3 of the lid 1 (see FIG. 9) and the inclination angle β of the side wall 104 of the container 101 (see FIG. 9) may be the same or different. If they are different, the inclination angle α of the side wall 3 may be larger or smaller than the inclination angle β of the side wall 104 of the container 101. However, when the inclination angle α is smaller than the inclination angle β (larger inclination), the fitting force of the lid 1 to the container 101 is stronger, resulting in better sealing. The magnitude of the inclination angle α of the side wall 3 of the lid 1 relative to the inclination angle β of the side wall 104 of the container 101 can be changed as desired depending on the size of the container 101 (size of the lid 1) and other factors in order to improve the sealing performance of the lid 1. In addition, in the case of non-circular containers such as polygonal containers, the inclination angle α of the side wall 3 of the lid body 1 can be changed depending on the shape of the container part into which the lid body 1 fits, thereby preventing changes in the sealing ability due to differences in the part of the container.

[0025] In the above embodiment, the lid body 1 is formed so that the upper wall 5 of the side wall 3 and the rising portion 4 of the canopy portion 2 are the same height, but the upper wall 5 of the side wall 3 and the rising portion 4 of the canopy portion 2 are not limited to being formed so as to be of the same height, and either the upper wall 5 of the side wall 3 or the rising portion 4 of the canopy portion 2 may be formed shorter than the other.

[0026] Examples of paper-based materials constituting the side wall 3 of the lid 1 include so-called paper, which is obtained by weaving a slurry of fiber material onto a screen, drying or pressing it, and then making it into a sheet; so-called airlaid sheets, which are obtained by pulverizing a raw material sheet made of pulp-based fibers or the like in a pulverizer, laying spread fiber material such as ground pulp using an air flow, and fixing the fibers of the stack 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 materials made by laminating multiple sheets of these. Paper-based materials may be made only of pulp or may contain non-pulp fibers such as natural fibers, synthetic fibers, and recycled fibers. However, the paper material preferably contains 50% by mass or more of pulp, more preferably 70% by mass or more, and even more preferably 80% by mass or more, with 100% by mass of pulp being particularly preferred. The paper-based material can be a composite material with synthetic or natural resin films or nonwoven fabrics, wood-based materials such as wood foil, or even aluminum foil. When a composite material is used, the composite material preferably contains 50% or more by mass of pulp, and more preferably 80% or more by mass of pulp. The higher the pulp content, the more easily the paper-based material will biodegrade, which is preferable.

[0027] Examples of pulp include wood pulp, non-wood pulp, recycled paper pulp, synthetic pulp, etc. More specifically, mechanical pulp (MP) such as groundwood pulp (GP), stone ground pulp (SGP), refiner ground pulp (RGP), pressure groundwood pulp (PGW), thermomechanical pulp (TMP), chemi-thermomechanical pulp (CTMP), bleached chemi-thermomechanical pulp (BCTMP), chemical-mechanical pulp (CGP), semi-chemical pulp (SCP), bleached hardwood kraft pulp (LBKP), and bleached softwood kraft pulp. Kraft pulp (KP) such as (NBKP), chemical pulp (CP) such as soda pulp (AP), sulfite pulp (SP), dissolving pulp (DP), synthetic pulp made from nylon, rayon, polyester, polyvinyl alcohol (PVA), etc., waste pulp (TP), rag pulp made from cotton, flax, hemp, jute, Manila hemp, ramie, etc., straw pulp, esparto pulp, bagasse pulp, bamboo pulp, stalk pulp such as kenaf pulp, bast pulp Examples of suitable pulps include those selected from the group consisting of red pine, todomatsu, Yezo pine, Douglas fir, hemlock, and spruce pulp, hardwood pulp such as beech, oak, birch, eucalyptus, poplar, and alder pulp, wood pulp such as a mixture of softwood pulp and hardwood pulp, non-wood pulp such as kenaf, bagasse pulp, bamboo pulp, cereal pulp, straw pulp, abaca pulp, and cotton pulp, and recycled paper pulp. Softwood pulp has longer fiber length than hardwood pulp, and therefore paper materials using pulp with long fiber length such as softwood pulp have a higher degree of intertwining of fibers. Furthermore, ground pulp obtained by pulverizing a raw material sheet using softwood pulp or the like also has longer fiber length than ground pulp obtained by pulverizing a raw material sheet made of hardwood pulp, and therefore the intertwining of fibers improves the strength of the paper material. Of the pulps mentioned above, it is preferable to use biodegradable pulps.

[0028] The paper-based material is preferably water-resistant, and a material that has been previously imparted water resistance, such as waterproof paper, may be used, or a paper-based material with a coating layer provided on at least the surface facing the container may be used. The coating layer can be provided by adhering a film or applying a coating agent.

[0029] Examples of resins that form the coating layer include polystyrene, polyethylene, polypropylene, polyethylene terephthalate, polyurethane, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, cyanoacrylate, epoxy resin, polyacrylic acid resin, polymethacrylic acid resin, nylon, polycarbonate; polycaprolactone, polyhydroxyalkanoate, polyhydroxybutyrate, polylactic acid, starch-based resins such as esterified starch, cellulose acetate, polyethylene succinate, polyvinyl alcohol, polyglycolic acid, chitosan / cellulose / starch, poly(hydroxybutyrate / hydroxyhexanoate), poly(caprolactone / butylene succinate), polybutylene succinate, poly(butylene succinate / adipate), poly Examples of suitable coating layers include naturally degradable resins and mixtures of naturally degradable resins, such as poly(butylene succinate / carbonate), poly(ethylene terephthalate / succinate), poly(butylene adipate / terephthalate), and poly(tetramethylene adipate / terephthalate); naturally degradable biomass resins and mixtures of naturally degradable biomass resins; fluororesins, silicone resins, ultraviolet-curable resins, copolymers of the monomers that make up the above resins, such as ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, ethylene-propylene copolymer, ethylene-propylene-butadiene copolymer, acrylic-styrene copolymer, styrene-butadiene copolymer, and acrylonitrile-butadiene-styrene copolymer; natural resins, paraffin, gelatin, cellophane, and polymethylpentene. The coating layer is preferably formed from naturally degradable resins, such as polylactic acid, polycaprolactone, polyhydroxyalkanoates, and starch-based resins, naturally degradable biomass resins, and natural resins.

[0030] Examples of naturally degradable resins include natural resins, naturally degradable plastics, biomass plastics, etc. Examples of naturally degradable plastics and biomass plastics include naturally degradable resins and mixtures of naturally degradable resins such as polycaprolactone, polyhydroxyalkanoate, polyhydroxybutyrate, polylactic acid, starch-based resins such as esterified starch, cellulose acetate, polyethylene succinate, polyvinyl alcohol, polyglycolic acid, chitosan / cellulose / starch, poly(hydroxybutyrate / hydroxyhexanoate), poly(caprolactone / butylene succinate), polybutylene succinate, poly(butylene succinate / adipate), poly(butylene succinate / carbonate), poly(ethylene terephthalate / succinate), poly(butylene adipate / terephthalate), and poly(tetramethylene adipate / terephthalate).

[0031] The naturally degradable resin may also contain additives listed on the positive list of the Japan Bioplastics Association, such as lubricants such as stearic acid amide, fatty acid esters, fatty acid metal salts, fatty acids, fats and oils, and glycerin fatty acid esters; stabilizers such as triphenyl phosphate, phthalic anhydride, tris(dibutyl phosphate), and acetic anhydride; inorganic materials such as titanium dioxide, kaolin, mica, bentonite, diatomaceous earth, magnesium oxide, aluminum silica sand, calcium carbonate, calcium hydroxide, and shell powder; surfactants such as higher fatty acid amides, nonionic surfactants, and glycerin fatty acid esters; blowing agents such as citric acid, sodium bicarbonate, and butane; and other materials such as antistatic agents and hot melt adhesives.

[0032] Furthermore, "naturally degradable" refers to the property of being decomposed in the air, soil, or water by microorganisms, ultraviolet rays, climate changes, etc., thereby reducing the environmental impact. Furthermore, the lid is not limited by the contents of the container to which it is attached, and can be applied to lids that close containers that can hold any type of contents.

[0033] The canopy portion 2 of the lid body 1 can be made of the same paper-based material as the side wall 3, but can also be made of a film or sheet material in addition to the paper-based material. When the canopy portion 2 is made of a film or sheet material, it has higher flexibility than when the canopy portion 2 is made of a paper-based material, making it easier to fit the lid body 1 into the container 101. Furthermore, when made of a transparent film or sheet material, the contents stored in the container 101 can be easily visually confirmed when attached to the container 101. Examples of film or sheet materials that can be used include polyvinyl chloride, polyvinylidene chloride, polyurethane, polyethylene terephthalate (PET), olefin resins such as polyethylene and polypropylene, polyvinyl alcohol, acrylic resins such as polyacrylic acid, polymethacrylic acid, and acrylonitrile-butadiene-styrene copolymers, polyethylene terephthalate, cellophane, nylon, ethylene-vinyl alcohol copolymers, polymethylpentene, polyvinyl acetate, polylactic acid, polycaprolactone, polyhydroxyalkanoates, starch-based resins, and composites thereof. Biodegradable materials such as polyvinyl acetate, polylactic acid, polycaprolactone, polyhydroxyalkanoates, and starch-based resins are preferred. Also usable are laminates in which an aluminum layer is formed on paper or the like by vapor deposition, or an aluminum layer is further provided on the surface of paper or the like, with a laminate or coating layer of polyethylene, polypropylene, or the like on one or both sides. When the canopy portion 2 is made of a film or sheet material, such as PET, which is difficult to heat seal, if the surface that joins with the side wall 3 is coated with, for example, polyethylene or polypropylene (OPP, CPP, etc.), joining by heat sealing can be easily carried out.

[0034] When the canopy 2 of the lid 1 is made of a paper-based material or a film or sheet material, if the side of the canopy 2 that contacts the opening of the container 101 is made of a material that has heat-sealing properties, the canopy 2 may be joined to the edge 103 of the container 101 by heat sealing, and the seal may be removed when the canopy 2 is to be used, and the lid 1 may be removed from the container 101. In this way, the contents of the container 101 can be sealed from the outside air until use. When the canopy 2 is made of a film or sheet material, it is preferable to use a material that is breathable or moisture-resistant, as this increases the ability to seal against the outside air.

[0035] When closing a container 101 with the lid 1 of the first embodiment, first, as shown in Fig. 10, the engaging portion 7 on one end of the lid 1 is fitted into the edge 103 of the container 101, and then the engaging portions 7 are sequentially fitted into the edge 103 facing away from the lid 1, so as to warp the canopy portion 2 and fit the engaging portion 7 on the other end of the lid 1 into the edge 103 of the container 101, thereby fitting the lid 1 into the container 101 and closing the lid as shown in Fig. 9. The lid 1 of the first embodiment is flexible as a whole, and the lower wall 6 of the side wall 3 is elastic in the thickness direction. Therefore, even if the inner dimension of the lower end of the lower wall 6 is smaller than the outer dimension of the opening of the container 101, the lid 1 can be fitted into the container 101, and the container opening (edge ​​103) and the inner surface of the lower wall of the lid 1 and the underside of the canopy are in close contact with each other, allowing the container 101 to be reliably closed with high sealing performance. The lid 1 of the first embodiment is not limited to containers having curled portions, and can be fitted into the opening of any container to maintain high sealing performance.

[0036] Next, the configuration of the opening-forming portion 11 and other components of the canopy portion 2 will be described. As shown in FIG. 1 and elsewhere, the opening-forming portion 11 has an opening 12 and a small lid piece 13. As shown in FIG. 1, the opening 12 is preferably formed inside the main body 2a1 of the top surface 2a. Furthermore, the small lid piece 13 is preferably formed to be able to open and close the opening 12 of the main body 2a1. In this case, the small lid piece 13 and the opening 12 are formed so that the small lid piece 13 closes the opening 12 as shown in FIGS. 1 and 4, and the small lid piece 13 is open and the opening 12 is open as shown in FIGS. 3 and 5. The opening 12 constituting the opening-forming portion 11 communicates between the inside and outside of the canopy portion 2 and is formed to penetrate between the front surface 2b and the back surface 2c of the canopy portion 2. When the lid body 1 is attached to a container 101, for example, the opening 12 serves to form an entrance and exit for contents (e.g., beverages, food, etc.) in the space 105 of the container 101. As shown in FIG. 1 and other figures, opening-forming portion 11 is provided on canopy portion 2 at a position offset from the center of canopy portion 2 to a predetermined position outward. Small lid piece 13 formed on canopy portion 2 is formed so that one end 13a, located a predetermined distance outward from the center of canopy portion 2, is a free end, and the other end 13b, located closer to the center than one end 13a, is a fixed end. Regarding small lid piece 13, one end 13a is also referred to as a base end located closer to the center of top surface portion 2a, and the other end 13b is also referred to as a tip end located on the edge side of top surface portion 2a. One end 13a, which is the free end, is also referred to as a tip, and the position between this tip and other end 13b (hinge portion 14) that is closer to one end 13a, which is the tip of the other end 13b, is referred to as a "position closer to the tip" or "near the tip."

[0037] A hinge portion 14 is formed at the other end portion 13b, and the small lid piece 13 is configured to be able to open and close via this hinge portion 14. In other words, the opening-forming portion 11 is configured to rotate around the hinge portion 14 at the other end portion 13b of the small lid piece 13 as a fulcrum, and one end portion 13a opens and closes relative to the canopy portion 2. The opening-forming portion 11 is also configured to form the opening 12 when the small lid piece 13 is opened. Note that, when the small lid piece 13 opens and closes, it is preferable that a folding line 15 is formed in the hinge portion 14 (see FIG. 12(g)). This folding line 15 may be formed on the front surface 2b side and / or the back surface 2c side of the canopy portion 2. By forming the fold line 15 in the hinge portion 14 in this manner, the small-lid piece 13 can be easily opened and closed using the fold line 15 as a reference. Furthermore, since the other end 13b of the small-lid piece 13 bends at the location where the fold line 15 is formed, the small-lid piece 13 can be easily and neatly folded when bent at the hinge portion 14, i.e., when opened. In other words, by forming the fold line 15, it is possible to prevent the small-lid piece 13 from being folded at a location other than the location where the fold line 15 is formed, using a fulcrum. The fold line 15 can be pressed linearly, for example, by press molding. That is, the fold line 15 can be formed by linearly pressing the predetermined location where the fold line 15 is to be formed using a press molding machine or the like. Since the small-lid piece 13 is folded only at the specific location where the fold line 15 is formed, variation in the folding position of the small-lid piece 13 can be significantly reduced. The folding lines 15 can be formed by any conventionally known method.

[0038] The opening forming portion 11 is configured so that when the small lid piece 13 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 opening 12. It is desirable that the location where this opening 12 is formed is such that one end side edge 12a of the opening 12 (the end on the same side as one end of the small lid piece 13) is located outside the inner wall 106 of the container 101 when the lid body 1 is attached to the container 101.

[0039] The opening-forming portion 11 has fold lines 15 formed where the hinge portion 14 is formed, and cut lines 16 formed in areas other than where the hinge portion 14 is formed, with point joints 17 formed between the cut lines 16. The point joints 17 join the small flap piece 13 to the top surface portion 2a and maintain the opening 12 in a closed state. By forming the opening-forming portion 11 in this manner, the presence of the point joints 17 allows the small flap piece 13 to maintain a closed state before use, and when the small flap piece 13 is pulled by or pulled up by a tab member 21 (described later), the point joints 17 break and the joint at the point joints 17 is released.

[0040] Furthermore, the opening-forming portion 11 may be formed by the cut lines 16 and point joints 17 as described above, or may be formed as a half-cut portion, in which a cuttable line is formed along the overall shape of the small lid piece 13 (in other words, along the overall shape of the opening 12). When formed as a half-cut portion, the cut lines 16 and point joints 17 as described above are not present, and cuts are formed overall along the shape of the small lid piece 13 (or opening 12). The depth of the cuts in these half-cut portions is thinner than the overall thickness of the canopy portion 2, and they are formed so as not to penetrate between the front surface 2b and the back surface 2c of the canopy portion 2, as do the cut lines 16. When using these cut lines 16, point joints 17, and half-cut portions, in addition to forming half-cut portions in place of the cut lines 16 and point joints 17 in the lid body 1, the cut lines 16, point joints 17, and half-cut portions may each be used.

[0041] As shown in FIG. 1 and other figures, the small cover piece 13 has a stress relief portion 18 formed at the other end 13b where the hinge portion 14 is formed, for reducing stress caused by a force applied when the small cover piece 13 is lifted up. In the example shown in FIG. 1 and other figures, the stress relief portion 18 is formed so as to curve in a direction opposite to the direction in which the small cover piece 13 is formed at the location where the hinge portion 14 is formed, in a direction in which the distance between the cut lines 16 increases. The stress relief portion 18 is formed so that the end on the other end side of the cut lines 16 is shifted from the radial position where the hinge portion 14 is formed, i.e., is positioned radially outward from the radial position. By positioning the end on the other end side of the cut lines 16 in the stress relief portion 18 at the above-mentioned position, the magnitude of the stress applied to the position where the cut lines 16 are formed adjacent to the hinge portion 14 can be reduced. In order to reduce the magnitude of the stress generated at this position, the other end of the cut line 16 need not be located at the same location as the hinge portion 14, but should be located at a different location from the location where the hinge portion 14 is formed. By forming the stress relief portion 18 in this way, the stress applied to the other end of the cut line 16 when the small flap piece 13 is opened can be reduced, and the problem of canopy portion 2 being torn or broken when the small flap piece 13 is opened can also be eliminated.

[0042] As shown in Fig. 6, the cut line 16 may be formed by cutting perpendicularly from the front surface 2b to the back surface 2c of the canopy portion 2, or may be formed by cutting at a predetermined angle from the front surface 2b to the back surface 2c of the canopy portion 2. When the cut line 16 is formed perpendicularly from the front surface 2b to the back surface 2c of the canopy portion 2 as shown in Fig. 6, it becomes relatively easy to open the small lid piece 13 along the cut line 16. Furthermore, when the cut line 16 is formed by cutting at a predetermined angle, the inclined cut surface formed on the canopy portion 2 side and the inclined cut surface formed on the small lid piece 13 side abut against each other. Therefore, when attempting to lift up small lid piece 13 or when container 101 is closed with lid body 1, even if the canopy 2 is pressed from the back surface 2c toward the front surface 2b due to a change in steam pressure in space 105, the cut surface on the canopy 2 side and the cut surface on the canopy 2 side abut against each other, making it difficult to open small lid piece 13. Therefore, forming the canopy piece in this manner more effectively prevents small lid piece 13 from opening unexpectedly. Note that when the canopy 2 side and the small lid piece 13 side have inclined cut surfaces, it is preferable that the cut surface on the canopy 2 side be inclined so that the end of the cut surface on the front surface 2b is closer to the center than the end of the cut surface on the back surface 2c. In addition, it is preferable that the cut surface on the small lid piece 13 side be formed so that the end of the cut surface on the back surface 2c is closer to the radial outward end of the cut on the front surface 2b.

[0043] The opening forming portion 11 can be formed by, for example, a punching method using a Thomson die or any other conventionally known method. To form the opening forming portion 11 using the above-described method, the thickness of the punching blade used in the punching process is preferably 1.0 mm or less. More specifically, it is preferably 0.7 mm or less, and even more preferably 0.4 mm or less. When the punching blade is 0.4 mm or less, even though the cut line 16 is formed, the characteristics of the paper material after cutting make it difficult for a gap to form from the cut line 16. This significantly reduces leakage from the cut line 16. In this embodiment, the shape of the opening 12 is formed to correspond to the shape of the small lid piece 13. However, the shape of the opening 12 is not limited to this shape and may be formed to be different from the shape of the small lid piece 13. In this case, if a gap is formed between the opening 12 and the small lid piece 13, it is desirable to prevent dust and other particles from entering the container 101 through this gap. Therefore, from the viewpoint of facilitating the molding of the lid body 1 and eliminating the risk of foreign matter such as dust being mixed in, it is preferable that the shape of the opening 12 be formed to be the same as the shape of the small lid piece 13.

[0044] In the case of the lid 1 of a container for holding a beverage as in this embodiment, the opening 12 is an opening formed so as to function as a drinking spout that allows the beverage in the container 101 to flow out of the container 101 when a user drinks the beverage in the container 101. The opening 12 may also function as an insertion port through which an object such as a straw can be inserted into the space 105 of the container 101.

[0045] As shown in FIG. 1 and other figures, a tab member 21 is attached to the small flap piece 13. A joint 22 is formed at one end 21a of the tab member 21 near the tip of the small flap piece 13. That is, the joint 22, which is joined to the one end 21a of the tab member 21, is joined to the small flap piece 13 near the tip of the small flap piece 13. This joint 22 is intended to be joined to the small flap piece 13 by various methods, such as ultrasonic welding, heat sealing, or bonding with an adhesive. Of the above methods, ultrasonic welding is preferred as the joining method for the joint 22 from the viewpoints of ease of joining and bonding strength. The portion of the one end 21a of the small flap piece 13 where the tab member 21 is attached is positioned offset from the center of the small flap piece 13, further away from the center of the canopy portion 2 on the small flap piece 13, and further away from the center of the canopy portion 2 on the small flap piece 13. That is, tab member 21 is attached to small flap piece 13 at a position close to one end 13a, i.e., at a position near the tip of small flap piece 13. In other words, small flap piece 13 is formed so that tab member 21 joins with one end side of canopy portion 2. In particular, joint portion 22 where small flap piece 13 and tab member 21 join is preferably formed on small flap piece 13 at one end 13a side away from hinge portion 14.

[0046] In this way, if the tab member 21 is joined to the small flap piece 13 at a position closer to the tip and further away from the hinge portion 14, the distance to the point of force on the hinge portion 14 (fulcrum) can be increased. As a result, when the tab member 21 is lifted, for example, force is applied to the small flap piece 13 via the tab member 21, releasing the joints at the point joints 17 and the half-cut portions, making it easier to open and close the small flap piece 13.

[0047] The tab member 21 has one end 21a attached to the small flap piece 13 and the other end 21b opposite to the one end 21a. The tab member 21 also has a tab main body and a holding portion 23, and is preferably formed so that the holding portion 23 can protrude from the tab main body. In this case, the holding portion 23 is preferably formed in a position between the one end 21a and the other end 21b of the tab member 21, and is preferably formed in a claw shape by making a cut line 23a in the tab member 21 (more specifically, the tab main body). Although the holding portion 23 is formed in a position between the one end 21a and the other end 21b, it is preferably formed in a position close to the other end 21b of the tab member 21, in other words, at a position where a gripping portion 24 (described later) is formed or in a position close to the gripping portion 24. 1 and 4, retaining portion 23 has a cut line 23a formed in tab member 21 (tab main body). However, when retained by insertion portion 26 formed in canopy portion 2, i.e., when retaining portion 23, which is claw-shaped in this embodiment, is inserted as insertion portion 26 into the cut line formed in top surface portion 2a, retaining portion 23 is formed in a claw-like shape protruding from tab member 21 (tab main body) toward surface 2b of canopy portion 2. In this embodiment, as shown in FIG. 1, retaining portion 23 has a triangular shape at tip 23b that is rounded but pointed overall. However, the shape of retaining portion 23 is not limited to a triangular shape. For example, retaining portion 23 may have any conventionally known shape, such as a semicircular shape, a polygonal shape such as a square, or an elliptical shape. That is, the retaining portion 23 may have any shape as long as it can be inserted into the insertion portion 26 and can maintain the small cover piece 13 in an open state, in other words, the opening 12 in an open state, when inserted into the insertion portion 26. A retaining portion 23 formed in such a shape is sometimes referred to as a retaining piece. Because a retaining piece is essentially the same concept as a retaining portion, hereinafter, the retaining portion and the retaining piece will be described using the same reference numeral.

[0048] As described above, as shown in Figures 2 and 3, the retaining piece 23 is formed to protrude from the tab body of the tab member 21 when the small-lid piece 13 is opened by pinching the tab portion 24 (described later). The retaining piece 23 is preferably formed so as to protrude from the side of the tab member 21 where the tab portion 24 is formed toward the side where the joint portion 22 is formed. Forming the retaining piece 23 in this manner makes it difficult for the retaining piece 23 to come off the insertion portion 26 when inserted into the insertion portion 26, thereby more reliably maintaining the small-lid piece 13 in an open state, i.e., the state in which the opening 12 is open. Furthermore, a fold line 23c may be formed in the tab member 21 to facilitate protrusion of the retaining piece 23. Forming such a fold line 23c makes it easier to insert the retaining piece 23 into the insertion portion 26, thereby making it easier to achieve the above-mentioned effects. Furthermore, the insertion portion 26 is formed so that the contents in the container 101 do not leak or spill before the holding portion 23 is inserted, and is formed to penetrate through when the holding portion 23 is inserted.

[0049] As shown in FIGS. 1 and 3 , the tab member 21 has a gripping portion 24 formed at the other end 21b. The gripping portion 24 is formed to be wider than the joint portion 22 at the one end 21a, making it easier for the user to grip the tab member 21 when using the tab member 21 to open the small flap piece 13, and to easily pull the small flap piece 13 when lifting it up to open it, and to easily push the small flap piece 13 when closing it. In this embodiment, the gripping portion 24 is formed in an overall curved shape, but the shape of the gripping portion 24 is not limited to a curved shape and may be any shape that is easy for the user to grip and operate the tab member 21. The gripping portion 24 also has a display portion 24a formed thereon. This display portion 24a may be formed in any manner; for example, in this embodiment, the word "OPEN" is written on it. By forming this display portion 24a, the user can be informed of the function of the tab member 21 in this embodiment. The characters displayed on the display unit 24a are not limited to the above example, and other characters may be displayed. The size of the display unit 24a and the font and color of the displayed characters may be arbitrarily adopted.

[0050] The grip portion 24 is provided with a pattern 24b that resembles a person's facial expression. In this embodiment, as shown in FIG. 1(a), the pattern 24b is composed of a pattern drawn along the cut line 23a along which the holding portion 23 is formed, and a pattern drawn in proximity to the base end of the cut line 23a. In this way, if the pattern drawn along the cut line 23a represents the person's mouth and the pattern drawn in proximity to the base end of the cut line 23a represents the person's eyes, a design pattern is formed that looks as if the person is smiling. Note that the cut line 23a has been omitted from FIG. 1(b) in order to clearly show this pattern. 3, when the retaining portion 23 is inserted into the insertion portion 26 and the small lid piece 13 is opened, the pattern drawn along the cut line 23a remains the same, but the pattern drawn in the vicinity of the base end of the cut line 23a is formed as the tab portion 24 rises, creating a pattern that gives a different impression from the decorative pattern described above. That is, the pattern 24b is formed so that it has a different expression before and after the retaining piece 23 is protruded. In this case, the pattern 24b changes three-dimensionally before and after the retaining piece 23 is protruded, and the expression shown by the pattern before the retaining piece 23 is protruded is different from the expression shown by the pattern after the retaining piece 23 is protruded. Forming such a pattern 24b can soothe the user's feelings and create a warm feeling. Generally, such a lid 1 is used without any printing, or is often used with the brand name or manufacturer of the contents printed on it, but by providing such a pattern 24b, even a lid 1 that tends to be impersonal can stimulate the user's sense of playfulness, soothe the user's emotions, induce a warm feeling, and achieve a highly soothing effect. Note that the above-mentioned embodiment of the pattern 24b is merely one example, and patterns other than those described above may be arbitrarily adopted and used as appropriate, and the pattern 24b need not be formed on the knob 24.Furthermore, in the above explanation, an example of pattern 24b was given in which a person's facial expression was imitated, but the pattern 24b used is not limited to an imitation of a person's facial expression, and for example, a store or brand logo or product name may be used as pattern 24a, or the knob portion 24 may simply be colored a predetermined color.

[0051] Furthermore, it is preferable that the tab portion 24 is formed so as to stand up when the holding piece 23 is inserted into the insertion portion 26. By forming the tab portion 24 in this way, not only can the visual effect of the above-mentioned pattern 24b be obtained, but also the complexity of the insertion action can be significantly reduced and the insertion can be made easier when inserting the holding piece 23 into the insertion portion 26. Furthermore, it becomes easier for the user to grip the tab member 21 when pulling out the inserted holding piece 23 from the insertion portion 26, and operability can be improved.

[0052] If necessary, the other end 21b may be adhered to the top surface 2a using the adhesive or the like as mentioned above, thereby preventing the tab member 21 from being damaged before use.

[0053] Furthermore, the material for forming this tab member 21 can be the same as the material for forming the canopy portion 2 and the side wall 3, such as the paper-based material described above, or other materials selected as appropriate. Other materials that can be used to form the tab member 21 include, for example, pieces of wood, film-like materials, and metal materials. However, when using these materials, it is necessary that the retaining portion 23 can be formed and that the retaining portion 23 can be maintained in a held state in the insertion portion 26. In other words, any material may be selected as appropriate for use in the tab member 21 as long as the user can pull up the small cover piece 13 by gripping and operating the knob portion 24, the retaining portion 23 is held in the insertion portion 26, and the opening 12 can be maintained in an open state while the retaining portion 23 is inserted and held in the insertion portion 26.

[0054] Next, the function and effect of the opening forming portion 11 in the lid 1 according to the first embodiment will be described. First, as shown in FIG. 8(a), a user pinches the knob portion 24 of the tab member 21 in the lid 1 and lifts the other end 21b of the tab member 21. At this time, if the other end 21b is joined to the canopy portion 2, as described above, the user pinches the other end 21b of the tab member 21 and peels the tab member 21 from the surface 2b of the canopy portion 2, thereby releasing the joining, and then pinches and lifts the tab member 21 by pinching the knob portion 24 at the other end 21b. Next, as shown in FIG. 8(b), when the user pinches the knob portion 24 and pulls the tab member 21 in direction B, the small lid piece 13 joined by the joint portion 22 at one end 21a of the tab member 21 is lifted in direction C in the figure with the hinge portion 14 as the reference. At this time, the joint 22 is formed in a part of the small flap piece 13, more specifically, the joint 22 is formed near the tip of the small flap piece 13, and a non-jointed portion is formed between the small flap piece 13 and the tab member 21 at a location other than the joint 22. In this way, since the tab member 21 is joined at a position close to one end 13a of the small flap piece 13, when the hinge portion 14 is considered as a fulcrum and the joint 22 as a force point, a force in direction B applied by the user via the joint 22 easily acts to rotate and lift the small flap piece 13 in direction C. Note that if a fold line 15 is formed at the location where the hinge portion 14 is formed, the small flap piece 13 is more easily lifted in direction C. Then, when the user further pulls the tab member 21 in direction B, the small flap piece 13 continues to rotate in direction C around the other end 13b, and the opening 12 is formed. At this time, the user may pinch knob 24 and bend other end 21b of tab member 21 so that holding portion 23 protrudes toward surface 2b of canopy 2, or may leave other end 21b unbent until it reaches the vicinity of insertion portion 26, and then insert holding portion 23 into insertion portion 26 and bend other end 21b of tab member 21 to form holding portion 23 just before holding portion 23 is held. Next, as shown in Figure 8(c), the user inserts holding portion 23 into insertion portion 26.By inserting the tab member 21 into the retaining portion 23 and the insertion portion 26 in this manner, the position of the tab member 21 and the opening position of the small flap piece 13 are physically fixed. For example, if an adhesive seal is used to keep the small flap piece 13 open, the back side of the small flap piece 13 often peels off easily, especially if the contents are a beverage or hot food. Therefore, even if an adhesive seal is used to secure the small flap piece 13, the adhesive strength gradually weakens over time, and the seal eventually peels off, causing the small flap piece 13 to return to its original position closing the opening 12. If this movement of the small flap piece 13 occurs, for example, when a user brings the surface 2b of the canopy portion 2 close to their face to drink a beverage, the small flap piece 13 may come into contact with the user's nose or face, potentially causing discomfort to the user. However, in the lid body 1 according to the first embodiment, the tab member 21 is physically fixed by holding the retaining portion 23 with the insertion portion 26, so that the small lid piece 13 is reliably prevented from returning to its original position over time, and the opening 12 can be kept open. Therefore, even when the user tries to take a sip of the contents in the space 105 of the container 101, the small lid piece 13 does not come into contact with the face, and the container can be used comfortably.

[0055] Furthermore, with the lid body 1 according to the first embodiment, the user operates the holding portion 23 to pull up the small lid piece 13, and can therefore open the opening 12 or operate the small lid piece 13 to close the opening 12 without touching the back side of the small lid piece 13. Therefore, for example, the user's fingers will not come into contact with the contents adhering to the back side of the small lid piece 13, making it hygienic and allowing for comfortable operation when opening the opening 12.

[0056] Furthermore, with the lid body 1 according to the first embodiment, by operating the retaining piece 23, which is held by being inserted into the insertion portion 26, the small lid piece 13 can be moved in the direction of closing the opening 12. Therefore, by operating the retaining piece 23, the small lid piece 13 can be easily opened and closed multiple times, and even if the contents of the container 101, such as a beverage, are not consumed within a short period of time, the small lid piece 13 can be easily closed and the small lid piece 13 can be kept closed. Furthermore, since the lid body 1 according to the first embodiment is formed using a paper-based material, it is possible to provide a lid body 1 that is environmentally friendly.

[0057] When the small flap piece 13 is opened in this manner, the opening angle θ of the small flap piece 13 shown in Figure 8(c) is preferably greater than 90°, more preferably 100° or greater, and even more preferably 120° or greater. It is also more preferably 140° or greater, and most preferably 178° or greater or 180°. By opening the small flap piece 13 to such an angle, it is possible to prevent the small flap piece 13 from hitting the user's nose when the user tries to drink the contents, greatly reducing the discomfort felt by the user.

[0058] 12(a) to 12(f) show examples of the opening-forming portion 11. The embodiment of FIG. 12(d) is an example of the opening-forming portion 11 formed on the lid body 1 described above, and is also described here. Specifically, the opening-forming portion 11 has the same shape as the small lid piece 13, and when the small lid piece 13 is opened, the opening 12 also has the same shape. Here, the shape of the opening-forming portion 11 is described, but the small lid piece 13 and the opening 12 are also described as including them. First, the opening-forming portion 11 is not limited to the shape described above and may have any shape, as shown in the modified example described below. For example, the opening-forming portion 11 shown in FIG. 12(a) has three point joints 17: one on one end side (the side of one end 13a) of the opening-forming portion 11, and one on each side midway from the one end side to the other end side (the side of the other end 13b). Furthermore, on the other end side, which is the other end 13b side, the cut line 16 that forms the opening forming portion 11 is formed in an arc from the other end side toward the one end side. In this modified example, a stress relief portion 18 is formed on the other end 13b side of the cut line 16. This stress relief portion 18 is formed in an arc shape, and the end of the cut line 16 on the other end 13b side is located higher than the end of the opening forming portion 11 on the other end 13b side. Furthermore, this stress relief portion 18 is formed to be located outward relative to the opening forming portion 11. By forming the stress relief portion 18 in this manner, it is possible to prevent damage to the canopy portion 2 due to the force applied to the small cover piece 13, etc., when, for example, moving the small cover piece 13 to open the opening 12.

[0059] The opening-forming portion 11 shown in FIG. 12(b) has the same shape as that shown in FIG. 12(a). The opening-forming portion 11 shown in FIG. 12(b) has a fold line 15 formed on the base end side in addition to the cut line 16, while the opening-forming portion 11 shown in FIG. 12(c) has a fold line 31 formed on the tip end side of the small flap piece 13 in addition to the cut line 16. The fold line 15 and the fold line 31 are formed to specify the position at which the end of the other end 13b of the small flap piece 13 serving as the opening-forming portion 11 bends when the small flap piece 13 serving as the opening-forming portion 11 transitions from a lying state (i.e., a state in which the opening 12 is closed) to an upright state (i.e., a state in which the opening 12 is opened). By forming the fold line 15 on the base end side of the opening-forming portion 11, the way the small flap piece 13 serving as the opening-forming portion 11 transitions from a lying state (i.e., a state in which the opening 12 is closed) to an upright state (i.e., a state in which the opening 12 is opened) can be effectively suppressed. Furthermore, by forming the folding line 31 at the edge of one end 13a of the opening-forming portion 11, it is possible to identify the location where the canopy portion 2 in which the opening-forming portion 11 is formed is to be folded. Therefore, when the opening-forming portion 11 moves from a lying down state to an upright state, the impact on the edge of one end 13a of the opening-forming portion 11 can be reduced.

[0060] 12(a) in that the width dimension at one end 13a is larger than the width dimension at the other end 13b. By forming opening-forming portion 11 in this manner, not only can the above-mentioned effects be obtained, but also, for example, if the contents of container 101 contain solids such as ice, it is possible to reliably prevent the solids from splashing into the mouth of the user when the user is using the container.

[0061] The opening-forming portion 11 shown in Fig. 12(e) has a width dimension that is the opposite of that of the shape in Fig. 12(d). That is, this opening-forming portion 11 differs in that the width dimension on the other end 13b side is larger than the width dimension on the one end 13a side. By forming the opening-forming portion 11 in this manner, not only can the above-mentioned effects be obtained, but also, for example, if the contents of the container 101 include solids such as ice, the opening-forming portion 11 of this example can reliably prevent the solids from flying into the user's mouth when the container is being used. 12(f) shows an aspect in which the opening-forming portion 11 is formed so that the stress relief portions 18 face inward. In this way, even if the stress relief portions 18 face inward, the ends of the cut lines 16 are located in positions different from the hinge portions 14, so that damage to the canopy portion 2 can be prevented in the same way as described above.

[0062] It is more preferable that the point-like joints 17 be formed at least at the very tip of the one end, which is the end on the one end 13a side. Generally, the opening-forming portion 11 is subjected to force from the user via the tab member 21. If the point-like joints 17 are not formed at the above-mentioned locations, the opening-forming portion 11 will lift up when the user applies force, significantly reducing the risk of the contents of the container 101 leaking out of the opening 12. In the embodiments shown in Figures 8(a) to 8(c), the small lid piece 13 serving as the opening-forming portion 11 may be formed by forming a cut line 16 or by forming a half-cut portion. The small lid piece 13 serving as the opening-forming portion 11 may also be formed in other ways.

[0063] FIGS. 13, 22, and 23 show modified examples of the lid 1 according to the first embodiment. In the modified examples shown in these figures, the configuration of the insertion portion 26 differs from that previously described. First, the insertion portion 26 in the lid 1 shown in FIG. 13 is composed of a main portion 26a and an auxiliary portion 26b. The main portion 26a is where the retaining piece 23 is inserted, and the auxiliary portion 26b is formed to intersect with the main portion 26a. By forming the insertion portion 26 in this manner, as shown in FIG. 13(b), the auxiliary portion 26b facilitates the main portion 26a to move up and down along with the movement of the retaining piece 23 when the retaining piece 23 is inserted into the insertion portion 26. This makes it easier to insert the retaining piece 23 into the insertion portion 26. Preferably, the auxiliary portion 26b is formed to intersect with the main portion 26a at a location away from the location where the tab member 21 is provided.

[0064] The lid 1 shown in FIG. 22 is similar to the previously described modified example in that the insertion portion 26 is formed of a main portion 26a and an auxiliary portion 26b. Additionally, the insertion portion 26 of the lid 1 according to this modified example has the main portion 26a and the auxiliary portion 26b formed continuously, and one end of the auxiliary portion 26b is a continuous portion 26c that is continuous with the main portion 26a. The other end of the auxiliary portion 26b, opposite the one end that is continuous portion 26c, is formed as an insertion auxiliary portion 26d. The insertion auxiliary portion 26d is formed to facilitate deformation of the region of the insertion portion 26 surrounded by the main portion 26a and the auxiliary portion 26b (hereinafter also referred to as the "insertion portion forming region 26e") as the holding piece 23 is inserted into the insertion portion 26. The insertion auxiliary portion 26d is preferably formed so that its direction is different from the direction in which the auxiliary portion 26b extends from one end to the other end. For example, as shown in FIG. 22, the shape of the insertion auxiliary portion 26d is preferably such that the other end of the auxiliary portion 26b curves inward toward the insertion portion forming region 26e. Forming the insertion auxiliary portion 26d in this manner makes it easier for the portion of the insertion portion 26 formed as the insertion portion forming region 26e to deform as the holding piece 23 is inserted, thereby enabling the holding piece 23 to be inserted more smoothly. Furthermore, the back side of the holding piece 23, i.e., the surface facing the top surface 2a before the tab member 21 is used, can be maintained in contact with the insertion portion 26. This makes it easier to physically maintain the state in which the holding piece 23 is inserted into the insertion portion 26, reducing the risk of the holding piece 23 coming off the insertion portion 26 due to an unexpected impact. On the other hand, when a user tries to pinch the knob portion 24 and pull out the holding piece 23 from the insertion portion 26, the holding piece 23 can be pulled out smoothly, which greatly improves the operability when the user inserts the holding piece 23 into the insertion portion 26 or pulls out the holding piece 23 from the insertion portion 26.

[0065] This insertion assist portion 26d may be in a form as shown in Figure 23(a). Figure 23(a) shows yet another modified example of the insertion portion 26 in the lid 1. In this example, the insertion assist portion 26d in the insertion portion 26 is formed so as to curve in a direction away from the insertion portion forming region 26e, in other words, toward the region opposite the insertion portion forming region 26e. The insertion assist portion 26d may be formed in this manner.

[0066] FIG. 23(b) shows another modified example of the lid 1. In this modified example, the lid 1 has a guide indicator 27 formed between the insertion portion 26 and the edge 2d of the top surface 2a. The guide indicator 27 notifies the user of the position of the insertion portion 26 and guides the user to the position where the retaining piece 23 should be inserted. The guide indicator 27 can be formed using any conventionally known method. For example, the guide indicator 27 may be formed by embossing the top surface 2a to form irregularities on the surface 2c of the top surface 2a, or by printing on the surface 2c of the top surface 2a. The guide indicator 27 may also be formed by other methods. The guide indicator 27 can further improve the user's operability of the tab member 21 by informing and guiding the user of the position of the insertion portion 26 where the retaining piece 23 should be inserted when the user grasps the knob portion 24 of the tab member 21 to pull up the small cover piece 13 and open the opening 12. When forming insertion portion 26 using a cut line as in this example, the user may be confused because they do not know the location of the cut line. In such cases, forming guide display portion 27 in this example makes it possible to inform the user of the location of insertion portion 26, thereby improving the operability described above. Note that, although an example of guide display portion 27 in FIG. 23(b) uses a shape that indicates the location of insertion portion 26 with an arrow, guide display portion 27 only needs to guide the user to the location of insertion portion 26. The shape and configuration of guide display portion 27 are not limited to this embodiment, and various embodiments may be adopted as desired.

[0067] Next, other modified examples of the tab member 21 will be described with reference to FIGS. 24 to 27. The tab members 21 shown in these examples are formed with an identification display portion 28 as a display portion. This identification display portion 28 is intended to facilitate identification of the type of contents (e.g., beverage) contained in the container 101 when the lid body 1 is used to close the container 101. This identification display portion 28 is formed to extend or protrude from the tab main body of the tab member 21 in the width direction, in other words, in a direction intersecting the direction in which the tab member 21 is moved when the user operates the tab member 21, more specifically, in a direction perpendicular to the direction in which the tab member 21 is moved. In the example shown in FIG. 24, four identification display portions 28 are formed, two on each end in the width direction, and each display has an indication indicating the type of contents, such as "Orange," "Cola," "Latte," or "Tea." As shown in the figure, the areas where these identification display portions 28 are formed are colored in a predetermined manner. In this case, the identification indicator 28 may be colored to correspond to the color of the contents, for example, orange for the "Orange" identification indicator 28 representing orange juice, brown for the "Cola" identification indicator 28 representing "Latte" identification indicator 28 representing light brown, and light red or green for the "Tea" identification indicator 28 representing light red or green, thereby making the contents easier to identify at a glance. In this case, applying a predetermined color to the identification indicator 28 may make the text in the identification indicator 28 difficult to read in black depending on the color. In such cases, it is preferable to change the text in the identification indicator 28 to white or another more readable color. Furthermore, by varying the color of each identification indicator 28, the tab member 21 can more easily present a vivid overall impression to those viewing the lid 1. This, combined with the effect of the pattern 24b representing a human face, as in the tab member 21 in this example, makes it easier to present a visually appealing impression to those who pick up the lid 1.

[0068] As shown in FIG. 24(b), the identification indicator 28 is configured to be bendable relative to the tab body. In this case, forming a notch or other fold-assistant portion at the folding location can make folding easier. By folding the identification indicator 28 in this manner, the user can at a glance determine the contents of the container closed by the lid 1. For example, as shown in FIG. 24(b), if the "Orange" identification indicator 28 of the identification indicators 28 on the tab member 21 is folded, the user can at a glance determine that the container 101 contains orange juice, easily preventing mistakes and other issues. Furthermore, the identification indicator 28 allows the person providing the beverage or the like to know the contents of the container 101 simply by folding the corresponding identification indicator 28. This prevents mistakes and allows the person providing the beverage or the like to easily confirm the contents when providing the beverage. This also facilitates smooth serving of the beverage or the like.

[0069] Although the above description has been given using an example in which the identification display portions 28 are each colored differently, all of the identification display portions 28 may be colored the same color, or none of the identification display portions 28 may be colored at all. The types of contents marked on the identification display portions 28 are not limited to those described above, and other types of contents may be used as appropriate. While the example shown in FIG. 24 has been described using an example in which four identification display portions 28 are formed, the number of identification display portions 28 is not limited to four and may be more or less than four. Furthermore, FIG. 24(b) has been described using an example in which only the "Orange" identification display portion 28 among the identification display portions 28 is folded, it goes without saying that the other identification display portions 28 besides "Orange" can also be folded.

[0070] FIG. 25 shows another example of an identification indicator 28 on a tab member 21. In the identification indicator 28 shown in FIG. 25, the folding assist portion 29 is formed so that it is positioned further inward from the tab main body than in the case shown in FIG. 24. By forming the identification indicator 28 in this manner, not only can the same effects as those described above be obtained, but the size of the tab member 21 can also be reduced. In addition, in another example of an identification indicator 28 shown in FIG. 26, the identification indicator 28 is formed by cutting a notch in the tab main body. In other words, this is an example in which the outer edge of the identification indicator 28 is formed so as to become the outer edge of the tab main body. In this way, the identification indicator 28 can be formed without changing the size or shape of the tab member 21 described above.

[0071] 24 to 26, the identification display unit 28 may also have a content indication on the back side of the identification display unit 28, as shown in FIG. 27. By providing content indications on both the front side 28a and the back side 28b of the identification display unit 28 in this manner, even when the identification display unit 28 corresponding to the corresponding content is folded, the content can be easily identified by looking at either the indication on the front side 28a or the back side 28b. This makes it easier for the person providing the beverage or the user receiving the beverage to distinguish the content. The indication on the back side 28b of the identification display unit 28 may be the same as or different from the indication on the front side 28a. For example, in the case of the identification display unit 28 described above, in which "Orange" is written, the front surface 28a may be colored orange and have "Orange" written in white letters, while the back surface 28b may have "Orange" written in black letters against the background color of uncolored paper. Alternatively, the "Orange" written on the back surface 28b may be in the same orange color as the color of the front surface 28a. In this way, not only can it be easily identified whether the item is written on the front surface 28a or the back surface 28b of the identification display unit 28, but the type of contents can also be easily identified. Furthermore, because the same color is used for coloring or writing on both the front surface 28a and the back surface 28b of the identification display unit 28, the user can easily identify what type of contents is in which container at a glance. In this way, when the identification display portion 28 is formed on the tab member 21, the contents of the container 101 can be identified by folding the identification display portion 28 as explained above, preventing the mistaken picking up of a product and allowing the customer to eat or drink the contents after knowing what they are, which also makes it possible to provide a sense of security. Note that, as explained above, this identification display portion 28 is configured so that the contents can be identified by folding it in a direction intersecting with the tab body, but it is preferable that the angle between the state before folding and the state after folding of the identification display portion 28 be close to 180°.It is also preferable to configure the container 101 so that it can maintain the folded state when folded in this manner. By configuring it in this manner, the identification display portion 28 makes it easier to identify the contents of the container 101, allowing the user to eat and drink with a greater sense of security.

[0072] Furthermore, the identification display unit 28 of the tab member 21 is not limited to the configuration described above. For example, as shown in FIG. 53 , when displaying a type of content such as “LATTE,” a display unit 300 displaying such a content may be formed on the tab body, and a predetermined portion of the outer periphery of the display unit 300 may be formed as a bendable foldable portion 301. When the identification display unit 28 is formed by the display unit 300 and the foldable portion 301 in this manner, if the content of the container 101 is, for example, a latte, the foldable portion 301 corresponding to the portion of the display unit 300 displaying “LATTE” is bent toward the tab body. At this time, when the foldable portion 301 is bent approximately 180°, a display window 302 is formed so that the display unit 300 can be seen even when the foldable portion 301 is bent, as shown in FIG. 53( b). Forming the identification display unit 28 in this manner allows a user to visually confirm that the content displayed in the display window 302 is the content of the container 101. In this way, by forming identification display portion 28, it becomes easier for the user or provider to confirm what the contents are, and it becomes possible to give a sense of security. Note that the method of identifying the contents using identification display portion 28 is not limited to the above. For example, the contents of container 101 may be made known by tearing bent portion 301 or the like as described above, or any other form may be used as long as it makes it easier for the user or provider to confirm the identity of the contents.

[0073] 14 to 21 show other examples of the canopy portion 2 and side wall 3 of the lid body according to the first embodiment. Note that what is shown here is merely an example, and it goes without saying that canopy portions 2 and side walls 3 of other configurations may also be used. Note that for the sake of convenience, the tab member 21 is omitted from FIGS. 14 to 17.

[0074] The cover 1 shown in Figure 14 is configured such that the rising portion 4 of the canopy 2 is flush with the upper end of the side wall 3. In this case, in addition to the configuration in which the rising portion 4 is flush with the upper end of the side wall 3 as shown in Figure 14(a), the rising portion 4 may be folded inward, as shown in Figure 14(b), so that the height position of the bent portion that forms the upper end of the rising portion 4 is flush with the upper end of the side wall 3. Alternatively, as shown in Figure 14(c), the height position of the bent portion of the rising portion 4 may be flush with the upper end of the side wall 3, but the folded portion of the rising portion 4 may not reach the canopy 2. Furthermore, as shown in Figures 14(d) and (e), the upper end of the folded portion of the side wall 3 folded outward may be flush with the upper end of the rising portion 4.

[0075] FIG. 15 shows an example in which a curled portion 41 is formed as a protruding portion at the upper end of the lid 1. The curled portion 41 may be formed in a curled shape as shown in FIG. 15, or may be formed by flattening a curled portion into a flange shape. The concept of the protruding portion here includes a portion that protrudes outward from the side wall 3. FIG. 15(a) shows an example in which the rising portion 4 and the side wall 3 are flush with each other, and the curled portion 41 is formed on the side wall 3. FIG. 15(b) shows an example in which the curled portion 41 is formed on the side wall 3, similar to FIG. 15(a), but the rising portion 4 is formed lower than the side wall 3. FIG. 15(c) shows an example in which the curled portion 41 is formed on the side wall 3, and the rising portion 4 protrudes higher than the upper end of the side wall 3. FIG. 15(d) shows an example in which the upper end of the rising portion 4 is located above the upper end of the side wall 3 and further protrudes outward from the side wall 3, forming the curled portion 41. In this way, the curled portion 41 can also be formed.

[0076] Forming curled portion 41 not only increases the strength of side wall 3 and canopy 2, but also improves the heat insulating effect. For example, when drinking a hot beverage, curled portion 41 can reduce the unpleasant heat felt on the lips and improve the mouthfeel.

[0077] Figure 16 shows an embodiment in which the rising portion 4 protrudes upward from the side wall 3. For example, in Figure 16(a), the rising portion 4 protrudes upward from the side wall 3, and in Figures 16(b) and 16(c), the rising portion 4 is folded back inward, with the folded end protruding above the upper end of the side wall 3. In Figures 16(d) and 16(e), the side wall 3 is folded back outward, with the upper end of the rising portion 4 protruding above the folded end.

[0078] 17 shows an embodiment in which the upper ends of the rising portions 4 are formed at a position lower than the upper ends of the side walls 3, which is the opposite of that in FIG. 16. In FIG. 17(a), the upper ends of the side walls 3 are positioned higher than the upper ends of the rising portions 4, while in FIGS. 17(b) and 17(c), the rising portions 4 are folded inward, and the upper ends of the side walls 3 are positioned higher than the upper ends of the folded portions. In addition, in FIGS. 17(d) and 17(e), the side walls 3 are folded outward, and the height position of the folded portions is higher than the upper ends of the rising portions 4.

[0079] FIGS. 18(a) and 18(b) show examples in which a sloped portion 51 is formed on the canopy portion 2. When the sloped portion 51 is formed on the canopy portion 2 in this manner, for example, after a beverage is consumed and the container 101 or the lid 1 attached to the container 101 is returned from a tilted state to a horizontal state, any beverage remaining on the inner surface of the rising portion 4 is more likely to return to the opening 12 along the sloped portion 51. By forming the sloped portion 51 in this manner, the beverage is less likely to remain on the surface 2b of the canopy portion 2. When the sloped portion 51 is formed on the canopy portion 2 in this manner, the opening 12 may be positioned to avoid the sloped portion 51, as shown in FIG. 18(a), or may be formed so that the opening 12 is formed in part of the sloped portion 51, as shown in FIG. 18(b). The shape of the side wall 3 may be linear, as shown in FIG. 18(a), or may be formed so that the lower wall 6 bulges out, as shown in FIG. 18(b). 18(c) shows an example of the lid body 1 described above, in which a guide portion 52 is formed at the lower end of the lower wall 6. This guide portion 52 is intended to make it easier to attach the lid body 1 to the container 101 when attaching it to the container 101. By forming this guide portion 52, it becomes possible to attach the lid body 1 to the container 101 more smoothly.

[0080] Figure 19 shows another example of the shape of the engagement portion 7 formed on the lower wall 6 of the lid 1 described above. Figure 19(a) shows the form of the lid 1 described above, where the engagement portion 7 does not bulge outward but is formed in a linear tapered shape. Figures 19(b) to 19(e) show a configuration in which the shape of the engagement portion 7 is formed in a linear tapered shape, similar to that described in Figure 19(a), but in which no rising portion 4 is formed, and instead a falling portion 61 is formed by forming a falling edge of the canopy portion 2. A lid 1 of this type may also be used.

[0081] FIG. 20 shows an example of a lid 1 in which the periphery of the top surface 2a of the canopy 2 has a downward-facing portion 61, a side wall 3 is formed to surround the downward-facing portion 61, and the downward-facing portion 61 and the side wall 3 are joined together. The lid 1 in FIG. 20(a) has a tapered engaging portion 7 formed in a straight line, while the lid 1 in FIG. 20(b) has an engaging portion 7 that bulges outward. The configuration of the engaging portion 7 is not limited to this embodiment, and the configurations described above may be used as appropriate. The lid 1 in the embodiment shown in FIG. 20(a) is shown in FIG. 21.

[0082] (Second embodiment) Next, a lid 1 according to a second embodiment will be described. The lid 1 according to the second embodiment is used by being joined along the edge 103 of the mouth 102 of the container 101. The lid 1 is formed into a shape that covers the mouth 102 when joined to the mouth 102 of the container 101. As shown in Figures 28(a), 28(b), 29, 30(a), and 30(b), the lid 1 has a joining region R that is joined to the edge 103 of the mouth 102 of the container 101 and a portion corresponding to the joining region R (hereinafter, this portion corresponding to the joining region R will be referred to as the "joint region corresponding portion Rd"). Furthermore, in a plan view of the lid 1 (the vertical direction is the viewing direction), the lid 1 is provided with a small lid piece 13 in a region of the exposed surface 70 of the lid 1 that corresponds to the inside of the joining region R (hereinafter, this may be simply referred to as the region inside the joining region R or the inner region Rn). Other configurations may be formed in the same manner as in the first embodiment. Therefore, in the lid body 1, an opening 12 is formed when the small lid piece 13 is pulled up. Also, in the lid body 1, a tab member 21 is joined to the small lid piece 13. The small lid piece 13, opening 12, and tab member 21 of the lid body 1 according to the second embodiment are formed in the same manner as the small lid piece 13, opening 12, and tab member 21 provided in the canopy portion 2 of the first embodiment. In the lid body 1 as well, the small lid piece 13 and opening 12 form an opening forming portion 11. Figures 28(a), 28(b), and 29 are diagrams showing an example of the lid body 1 according to the second embodiment.

[0083] (joint area) The bonding region R is a region formed in a ring shape along the mouth 102 of the container 101 in a shape corresponding to the mouth 102. The width W (width along the inward / outward direction) of the bonding region R is usually the same as or narrower than the width of the edge 103 of the mouth 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 mouth 102. The bonding region R may be formed inside the outer peripheral edge 71 of the lid 1, or may be formed up to the outer peripheral edge 71 of the lid 1 as shown in FIG. 39. FIG. 39 is a plan view showing another example of the lid 1 according to the second embodiment. Unless otherwise specified, the position relative to the bonding region R is defined as the position relative to the portion of the lid 1 that forms the bonding region R. For example, the inside (outside) of the bonding region R refers to the inside (outside) of the portion of the lid 1 that forms the bonding region R, unless otherwise specified.

[0084] (Small lid piece) The lid 1 is provided with a small lid piece 13. In the lid 1 according to the second embodiment, the small lid piece 13 is connected to a peripheral portion 72 including the joint region R. The peripheral portion 72 is configured, in a plan view of the lid 1, as a portion forming the exposed surface 70 of the lid 1, excluding the small lid piece 13. As shown in FIGS. 30(a) and 30(b), in the lid 1, as in the first embodiment, the small lid piece 13 is lifted in conjunction with the movement of the tab member 21 joined to the small lid piece 13 at the joint 22. The small lid piece 13 has a hinge portion 14 at the joint between the peripheral portion 72 and the small lid piece 13, and as the small lid piece 13 is lifted around the joint portion as a support axis, the opening 12 is exposed. The small lid piece 13 is provided inside the joint region R in a plan view of the lid 1. 30(a) and 30(b) are diagrams illustrating the state in which the opening 12 is exposed when the small lid piece 13 is lifted in the lid body 1 according to the second embodiment. Hereinafter, the connecting portion (hinge portion 14) of the outer peripheral edge 73 of the small lid piece 13 that serves as a support axis when the small lid piece 13 is lifted is referred to as the hinge connecting portion 74.

[0085] The shape and structure of the small lid piece 13 are not particularly limited. The shape and structure of the small lid piece 13 may be similar to the various shapes and structures shown in the examples of the first embodiment, as shown in Figures 28(a) and 28(b). Furthermore, as shown in Figure 29 and other figures, the shape of the small lid piece 13 preferably has a contour shape in which at least a portion of the outer periphery 73 of the small lid piece 13 extends along the inner edge of the joining region R. In the example of Figure 29, the shape of the front edge portion 75 of the outer periphery 73 of the small lid piece 13 is shaped along the inner edge of the joining region R. Furthermore, in this case, the shape of the front edge portion 75 tends to be shaped along the inner edge of the edge portion 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, in the description of the lid body 1 according to the second embodiment, unless otherwise specified, the description will be continued using the small lid piece 13 shown in Figure 29 as an example. In the example of the small lid piece 13 shown in FIG. 29, the outer peripheral edge 73 is made up of a front edge portion 75, a hinge connection portion 74, and a side edge portion 76 connecting the front edge portion 75 and the hinge connection portion 74.

[0086] In the example shown in FIG. 30 , the front edge 75 of the outer periphery 73 of the small lid piece 13 is preferably formed between positions PM1 and PM2 in a plan view of the lid 1, as shown in FIG. 32 . FIG. 32 is a diagram illustrating the position of the front edge 75. Position PM1 is the intersection position where an extended plane M1 of the inner periphery of the side wall 104 of the container 101 intersects with the exposed surface 70 of the lid 1 when the lid 1 is joined to the container 101. Position PM2 is the intersection position where a plane M2 extending from the inner end of the joining region R along the thickness direction of the lid 1 intersects with the exposed surface 70 of the lid 1. However, this does not prohibit the front edge 75 of the small lid piece 13 from being located between positions PM1 and PM2. For example, it is not prohibited for the front edge 75 to be formed slightly closer to the center of the lid 1 than position PM2.

[0087] The outer peripheral edge 73 of the small lid piece 13, excluding the hinge connection portion 74, may form a cut portion that is cut from the peripheral portion 72, or may form a weakened portion that is partially joined. The cut portion can be formed by providing a cut line 16 along the boundary between the small lid piece 13 and the peripheral portion 72, as shown in the example of FIG. 29. The weakened portion can be formed by providing a structure (perforated structure) in which short cut lines 16 and point-like joints 17 are alternately arranged at the boundary between the small lid piece 13 and the peripheral portion 72, as shown in the example of FIG. 28, or by forming a half-cut structure. The half-cut structure can be a structure in which a cut is made to a predetermined depth in the thickness direction of the lid body 1, as will be described later using FIGS. 40(a) and 40(b).

[0088] In the lid body 1 according to the second embodiment, the small lid piece 13 can be raised to cover the opening 12 even after the opening 12 is exposed. When the small lid piece 13 is raised, the opening 12 is exposed. This state is called the open lid state. When the opening 12 is covered by the small lid piece 13, it is called the closed lid state.

[0089] As shown in FIG. 35 , in the closed state of the lid body 1, the end face of the peripheral portion 72 faces the end face 73a (outer peripheral end face) of the outer peripheral edge 73 of the small lid piece 13. In this case, the portion of the end face of the peripheral portion 72 facing the end face 73a of the outer peripheral edge 73 of the small lid piece 13 is a facing surface 77. In the lid body 1 according to the second embodiment, it is preferable that the end face 73a of the outer peripheral edge 73 and the facing surface 77 come into contact with each other to form a contact portion 78. When the lid body 1 is made of a paper-based material, such a lid body 1 can be formed, for example, by forming a cut line 16 at the boundary between the small lid piece 13 and the peripheral portion 72. When the cut line 16 is formed, the paper-based material forming the lid body 1 is cut while being compressed at the boundary between the small lid piece 13 and the peripheral portion 72. Furthermore, at this time, the paper-based material is likely to be stretched near the boundary between the small lid piece 13 and the peripheral portion 72. Therefore, when the end face 73a of the outer periphery 73 of the small lid piece 13 and the facing surface 77 are arranged facing each other (i.e., in the closed state), the end face 73a and the facing surface 77 come into contact at the cut line 16, forming a contact portion 78, which tends to generate a force F between the small lid piece 13 and the peripheral portion 72. When the small lid piece 13 is opened from this closed state, at least a portion of the end face 73a of the outer periphery 73 and the facing surface 77 rub against each other. Therefore, in the closed state, the small lid piece 13 can tightly cover the opening 12, reducing the risk of liquid leaking from the inside of the container 101 through the gap between the small lid piece 13 and the peripheral portion 72. However, because the small lid piece 13 and the peripheral portion 72 are separated by the cut line 16 in the lid body 1, breathability is ensured, and steam can pass between the small lid piece 13 and the peripheral portion 72.

[0090] In addition, when the lid body 1 is formed of a paper-based material, it is preferable that a compressed portion 79 of the paper-based material constituting the lid body 1 is formed at the position of the end surface 73a of the small lid piece 13 and in the vicinity of the facing surface 77, as shown in the example of Figure 35. In the example of Figure 35, the compressed portion 79 in the vicinity of the end surface 73a of the small lid piece 13 is configured so that the compression rate gradually increases and the thickness gradually decreases toward the end surface 73a. Furthermore, the compressed portion 79 in the vicinity of the facing surface 77 is configured so that the compression rate gradually increases and the thickness gradually decreases toward the facing surface 77. In this case, even if the end surface 73a and the facing surface 77 come into contact with each other with a relatively strong force, distortion or bending is unlikely to occur at the contact portion 78, and the structure of the contact portion 78 can be firmly maintained.

[0091] Furthermore, in the lid body 1, from the viewpoint of forming a state in which the small lid piece 13 tightly covers the opening 12 in the closed state, the small lid piece 13 and the peripheral portion 72 may be formed as shown in FIG. 36. In FIG. 36, the shape of the outer periphery 73 of the small lid piece 13 is formed with a wave-like structure in part, and the shape of the periphery of the opening 12 (the portion forming the facing surface 77 of the peripheral portion 72) is formed to match the shape of the outer periphery 73 of the small lid piece 13. When the small lid piece 13 and the peripheral portion 72 are formed in this shape, at least a part of the contact portion 78 has a wave-like structure, i.e., the area of ​​the contact portion 78 is increased, making it easier for the small lid piece 13 to maintain a state in which the opening 12 is tightly covered.

[0092] (Tab member) The tab member 21 may be configured similarly to the tab member provided in the lid body 1 according to the first embodiment, as shown in Figures 28, 29, 30, etc. One end 21a of the tab member 21 is joined to a portion of the small lid piece 13 near the tip end (position close to one end 13a).

[0093] In the example of Figures 30(a) and 30(b), the tab member 21 has a retaining piece 23 formed between the joint portion 22 and the knob portion 24, and is configured so that the retaining piece 23 protrudes from the tab member 21 when the knob portion 24 is pinched to open the small flap piece 13. An insertion portion 26 into which the protruding retaining piece 23 is inserted is formed in the peripheral portion 72. Furthermore, the retaining piece 23 is configured to be inserted into the insertion portion 26 so that the small flap piece can be maintained in an open state. Note that the insertion portion 26 may have a main portion 26a and an auxiliary portion 26b, as in the first embodiment.

[0094] 28 and 29, the tab member 21 is provided so that, in the closed state, at least a portion of the tab member 21 overlaps directly above the small flap piece 13. When formed in this manner, even in the closed state, by moving the tab member 21 to eliminate the rising of the small flap piece 13 while keeping the tab member 21 horizontally so that it is roughly parallel to the lid body 1, it becomes easy to stop the movement of the small flap piece 13 in a state where a contact portion 78 is formed between the end surface 73a of the small flap piece 13 and the opposing surface 77.

[0095] 28 and other examples, tab member 21 is arranged so that tab portion 24 is located closer to the center of lid 1 than joint portion 22, but the arrangement of tab member 21 is not limited to this. Tab member 21 may be arranged so that the distance from the center of lid 1 to joint portion 22 is the same as the distance from the center of lid 1 to joint portion 22, or tab member 21 may be arranged so that joint portion 22 is located closer to the center of lid 1 than joint portion 24, as shown in FIG. 47. From the perspective of fitting tab member 21 within exposed surface 70 of lid 1 in a plan view of lid 1, it is preferable that tab member 21 be arranged so that tab portion 24 is located closer to the center of lid 1 than joint portion 22, as shown in the example of FIG. 28 and other examples.

[0096] According to the second embodiment, like the lid 1 according to the first embodiment, it is possible to obtain a lid whose opening corresponding to the drinking spout can be opened easily and hygienically.

[0097] A modified example of the lid body 1 according to the second embodiment will be described.

[0098] (Variation 1) In the lid 1 according to the second embodiment, as shown in Figures 33(a) and 33(b), a groove 80 may be formed in the exposed surface 70 in a region corresponding to the inside of the bonding region R (simply referred to as the inside of the bonding region R) in a plan view of the lid 1 (Modification 1). Figures 33(a) and 33(b) are diagrams showing an example of the lid 1 according to Modification 1 of the second embodiment.

[0099] (groove) In Modification 1, the groove 80 is preferably formed inside the joining region R so as to extend along the inner edge RA of the joining region R. The depth of the groove 80 is not particularly limited, but it is preferable that the groove 80 is configured so as to gradually become deeper from a position farther from the small lid piece 13 toward the small lid piece 13. Furthermore, the groove 80 is preferably also formed in the small lid piece 13, as shown in the example of Figure 33(a).

[0100] In the example of FIG. 33(a), the groove 80 is formed in a C-shape along the inner edge RA of the bonding region R, but it may also be formed in a ring shape.

[0101] Even when the groove 80 is formed, the outer peripheral edge 73 of the small cover piece 13, excluding the hinge connection portion 74 (front edge portion 75, side edge portion 76), may have a cut line 16 formed thereon as shown in FIG. 33(b), or may have a half-cut portion 81 as an example of a fragile portion as shown in FIGS. 40(a) and 40(b). FIGS. 40(a) and 40(b) are diagrams showing an embodiment of the cover 1 when the groove 80 is formed. FIG. 40(b) is a partial enlarged view of the dashed area X in FIG. 40(a). The half-cut portion 81 shown in this example is formed by cutting the material forming the cover 1 to a predetermined depth from the exposed surface 70 side of the cover 1. That is, the half-cut portion 81 is a portion cut so as not to penetrate the material forming the cover 1, and has the half-cut structure described above. However, this does not limit the configuration of the half-cut portion 81. In the example shown in Figures 40(a) and 40(b), that is, when the outer peripheral edge 73 of the small lid piece 13 excluding the hinge connection portion 74 is a half-cut portion 81 as a weak portion, even if the groove 80 is made deeper and is formed across the boundary between the small lid piece 13 and the peripheral portion 72, a gap is less likely to occur at the intersection of the boundary between the small lid piece 13 and the peripheral portion 72 and the groove 80.

[0102] 33(a), there is one groove 80, but there may be multiple concentric grooves 80. When multiple grooves 80 are formed, one type of lid 1 can be used to cover the mouths 102 of multiple types of containers 101 having different diameters of the mouths 102.

[0103] According to the lid body 1 of the first modified example of the second embodiment, when the lid body 1 is joined to the mouth portion 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 groove 80 before spilling outside the lid body 1. Furthermore, if the groove 80 is formed so as to become deeper toward the small lid piece 13, the liquid that has flowed into the groove 80 can be made to flow down toward the position of the small lid piece 13. Then, by lifting the small lid piece 13 to expose the opening 12, the liquid can be made to drip from the opening 12 into the container.

[0104] (protrusion) In the lid 1, it is preferable that a protrusion 82 is formed 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. 43, it is preferable that the protrusion 82 is formed at a position that contacts the inner surface side of the edge 103 of the mouth 102 of the container 101. It is also preferable that the height of the protrusion 82 is ensured to be high enough to prevent the exposed surface 70 of the lid 1 from shifting in the planar direction relative to the edge 103 of the mouth 102 of the container 101. Such a protrusion 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 protrusion 82 having a height corresponding to the depth of the groove 80 is formed at a position on the opposite side corresponding to the formation position of the groove 80. By forming groove 80 along the inside of edge 103 of mouth 102 of container 101, protrusion 82 can be formed along the inner edge of edge 103 of mouth 102 of container 101 and in contact with the inner surface of edge 103 of mouth 102 of container 101, as shown in Fig. 43. Fig. 43 is a cross-sectional view showing an example in which lid 1 is placed on container 101.

[0105] By forming such a protrusion 82, when the lid 1 is placed so as to cover the opening 102 of the container 101, it becomes easy to align the lid 1 with the container 101.

[0106] (Variation 2) In the lid 1 according to the second embodiment, as shown in FIG. 31 , a tab 83 or a label 84 may be formed outward from the outer peripheral edge 73 of the lid 1 (Modification 1). The tab 83 is preferably formed at a position far from the opening start end (one end 13a) of the small lid piece 13. The shape and size of the tab 83 are preferably formed to allow a user to pinch it with their fingertips. Forming the tab 83 in this manner reduces the risk of touching the opening 12 when grasping the lid 1, and prevents contamination of the opening 12 due to the hand touching the opening 12. In the example of FIG. 31 , the tab 83 is formed on the peripheral portion 72 in a plan view of the lid 1, and is formed at a portion of the outer peripheral edge 73 that includes the position farthest from the one end 13a. The tab 83 may be provided with any marking 200, such as letters indicating the size of the lid 1 or the container 101 (e.g., the letter "L" shown in FIG. 48). The markings provided on the tab 83 are not limited to printing, but may be embossed to form concave and convex shapes that are visible, or may be cut out in the tab 83 to form a shape that corresponds to the letter (e.g., L). Alternatively, or in addition to the markings described above, the tab 83 may be partially or entirely embossed or cut out. By applying such processing to the tab 83, it becomes easier for the user to grasp the lid 1 when picking up the lid 1 by gripping the tab 83. In the above example, the size of the lid 1 or the container 101 is indicated by letters, but the manner in which the size of the lid 1 or the container 101 is indicated is not limited to the above example. For example, the shape or color of the knob 83 may be changed depending on the size of the lid 1 or the container 101, so that the size of the lid 1 or the container 101 can be identified by visually checking the shape or color. For example, when identifying by changing the shape of the knob 83, in addition to the shape of the knob 83 described above, the shape of the knob 83 may be changed to, for example, as shown in FIG. 49(a) or FIG. 49(b), or a shape other than these may be used to enable identification. Furthermore, the size of the lid 1 or the container 101 may be identified by methods other than these. Furthermore, although the above is an example of identifying the size of the lid 1 or the container 101, the object to be identified is not limited to the size of the lid 1 or the container 101, and other objects may also be used as the object to be identified.

[0107] The shape and size of the label 84 are not limited, but it is preferable that the label 84 has a shape and size that can be recognized by a user. In the example of Fig. 31, a plurality of labels 84 are formed near the tab 83 on the outer circumferential edge 73 of the lid 1. The labels 84 may be used, for example, as follows: Each of the plurality of labels 84 has an individual product name printed thereon, and the label 84 bearing the product name corresponding to the content of the container 101 is folded. In this way, even after the container 101 is attached to the lid 1, the content of the product contained inside the container 101 can be identified by recognizing the folded label 84.

[0108] In the examples shown in Figures 54 and 55, multiple labels 84 are formed on the outer peripheral edge 73 of the lid 1. These multiple labels 84 are configured to be foldable along the outer peripheral edge 73 of the lid 1. A folding portion 400 is preferably formed at the boundary between the outer peripheral edge 73 and the labels 84 to facilitate folding of the labels 84. This folding portion 400 may have any configuration that facilitates folding of the labels 84. For example, the folding portion 400 may be formed by forming a perforation line at the boundary between the outer peripheral edge 73 and the labels 84, by forming a cut that is less than the thickness of the material constituting the lid 1, by forming a fold line, or by forming a combination of these. Furthermore, other configurations may be used as long as they facilitate folding of the labels 84. Individual product names, such as "COLA," "LATTE," "TEA," and "OTHER," may be written on the lid 1 in locations corresponding to the locations where the labels 84 are formed. These individual product names are not limited to those described above and may be written in other ways. Furthermore, it is preferable that at least a portion of each of these individual product names be displayed inside the outer periphery 73, and it is preferable that all of each of the individual product names be displayed inside the outer periphery 73. Displaying each product name in this manner allows the product name to be more clearly visible. FIG. 55(a) is a plan view showing an example of use of the lid body 1 in this example. This example shows a use example in which the contents are cola. In this case, the label 84 corresponding to the portion of the label 84 displaying "COLA," which corresponds to cola, is folded. FIG. 55(b) shows the folded state of this label 84. The folding direction of the label 84 is not limited to upward as shown in FIG. 55(b), but may also be downward. In this way, when the label 84 corresponding to the contents is folded, the other labels 84 are not folded, so that the label corresponding to the folded portion of the label 84 can be clearly and visually identified as the contents. This allows store employees and customers to easily know what the contents are, allowing them to eat and drink with peace of mind. In this example, the label 84 is folded, but the label 84 may be removed by tearing it off.In this case, it is also preferable to form the above-mentioned perforation lines or the like at the locations corresponding to the above-mentioned folding portions 400 to make it easier to tear off the label 84. In this way, even when the label 84 is torn off, it becomes easier to identify the corresponding contents. Note that other configurations than folding or tearing the label 84 may be used as long as they allow the contents to be clearly identified. Furthermore, the label 84 may be colored with a predetermined color or may be embossed, or any other conventionally known method may be selected and used as appropriate.

[0109] In the example of FIG. 31 , the label 84 is formed on the peripheral portion 72 of the lid body 1, but it may also be formed on the tab member 21. For example, as shown in FIG. 45(a), multiple labels 84 may be formed around the periphery of the tab member 21. Furthermore, if a tab 83 is formed, it may be formed on the tab 83 together with or instead of the insertion portion 26, as shown in FIG. 45(b). The insertion portion 90 may be formed with a structure similar to that of the insertion portion 26. In FIG. 45(b), an insertion portion 90 is formed in place of the insertion portion 26. The insertion portion 90 has the same function as the insertion portion 26. However, in this case, it is preferable that the size of the tab member 21 or the small lid piece 13 (opening 12) be such that the holding piece 23 of the tab member 21 can be inserted into the insertion portion 90 when the small lid piece 13 is lifted. Also, the tab member 21 may be locked by hooking the holding piece 23 onto the outer peripheral edge 73 of the lid 1. In this case, the insertion portion 26 of the lid 1 may be omitted.

[0110] As shown in FIG. 45(b), when the insertion portion 90 is formed on the tab 83, especially when the outline of the small lid piece 13 is formed by a half-cut line, there is no communication between the front and back surfaces of the top surface 2 in the area surrounded by the joining region R. Therefore, after the lid body 1 is sealed to the container 101 but before the user opens the small lid piece 13, the container 101 can be kept completely sealed, preventing the entry of foreign matter from the outside or the contents from leaking out of the container 101 when the user carries the container 1010 and shakes the container 101. Furthermore, when the insertion portion 90 is formed on the tab 83 in this manner, the size of the small lid piece 13 and, therefore, the size of the opening 12 can be increased. Increasing the size of the opening 12 and the small lid piece 13 in this way makes it easier for the user to drink the contents and greatly improves the ease of pouring the contents, such as beverages, into the container 101 through the opening 12.

[0111] While Figure 45(b) illustrates an embodiment in which the tab member 21 is locked by forming an insertion portion 90 on the knob 83 and inserting the retaining piece 23 into the insertion portion 90, as shown in Figure 50(a), the tab member 21 may be locked by hooking the retaining piece 23 onto the outer peripheral edge 73 of the lid body 1. Also, as shown in Figure 50(b), when the small-lid piece 13 is reclosed, the retaining piece 23 may be hooked onto the outer peripheral edge 73 on the side adjacent to the small-lid piece 13, so that the reclosed state of the small-lid piece 13 can be maintained. To reopen the reclosed small-lid piece 13, the hook between the outer peripheral edge 73 and the small-lid piece 13 can be released. Alternatively, as shown in Figure 56, a retaining receiving portion 401 extending from the outer peripheral edge 73 may be formed instead of the insertion portion. When the holding receiver 401 is formed in this manner, the small lid piece 13 is held open by, for example, hooking the holding part 23 onto this holding receiver 401, and when reclosing the small lid piece 13, the holding part 23 is removed from the holding receiver 401 and the small lid piece 13 is reclosed. In this case, the shape and size of the holding receiver 401 are not limited as long as it is capable of holding the holding part 23, and may be selected arbitrarily. In this example, the holding piece 23 formed on the tab member 21 is hooked onto the outer peripheral edge 73 to maintain the small-flip piece 13 in an open state and in a reclosed state, but the configuration for maintaining the small-flip piece 13 in an open state and in a reclosed state is not limited to the above, and other configurations may be selected and used as desired. For example, a sealing member may be used instead of the tab member 21 to maintain the small-flip piece 13 in an open state and in a reclosed state by adhesive action, or other members may be used to maintain the small-flip piece 13 in the above-mentioned states.

[0112] (Variation 3) In the lid body 1 according to the second embodiment, as shown in Figures 34(a) and 34(b), the small lid piece 13 may be formed with a large size so that the entire tab member 21 overlaps the small lid piece 13 in the closed state (Variation 3). However, even in Variation 3 of the second embodiment, the small lid piece 13 is formed inside the joining region R and is smaller in size than the lid body 1. Figures 34(a) and 34(b) are diagrams showing an example of the lid body 1 according to Variation 3 of the second embodiment.

[0113] In the lid body 1 according to the second embodiment, in the open state, the outer periphery of the small lid piece may be cut at the hinge connection portion. In this case, as shown in FIG. 34(a), it is preferable that the hinge connection portion 74 of the outer periphery 73 of the small lid piece 13 has the same configuration as the fragile portion. In FIG. 34(a), the fragile portion has a repeated structure (perforation) of cut lines 16 and point-like joints 17. In the example of FIG. 34(a), the portion of the outer periphery 73 of the small lid piece 13 excluding the hinge connection portion 74 has the cut line 16.

[0114] Furthermore, in the lid body 1 according to the second embodiment, the hinge connection portion 74 may be omitted as shown in Fig. 34(b). In the example of Fig. 34(b), the outer peripheral edge 73 of the small lid piece 13 is a weakened portion. Similar to Fig. 34(a), the weakened portion has a repeating structure (perforated structure) of cut lines 16 and point-like joints 17.

[0115] In this modified example 3 of the second embodiment, when the small flap piece 13 is lifted by the tab member 21 in the closed state, the small flap piece 13 is separated from the peripheral portion 72. Also, in modified example 3 of the second embodiment, the holding piece 23 and the insertion portion 26 may be omitted, as shown in Figure 34. However, in the present invention, from the viewpoint of obtaining the effect of holding the small flap piece 13 to the peripheral portion 72, it is preferable that the holding piece 23 and the insertion portion 26 are present.

[0116] (Variation 4) In the lid 1 according to the second embodiment, instead of forming a groove 80 inside the joining region R, as shown in Figures 37(a) and 37(b), a recessed portion 85 may be formed by recessing the entire region inside the joining region R with respect to the portion corresponding to the joining region R (Modification 4). Figures 37(a) and 37(b) are diagrams showing an example of the lid 1 according to Modification 4 of the second embodiment.

[0117] In the lid 1, it is preferable that a raised portion 86 is formed at a position on the side opposite to the surface (exposed surface 70) where the recessed portion 85 is formed. In this case, it is preferable that an outer peripheral edge 86a of the raised portion 86 is formed so as to contact the inner surface side of the rim portion 103 of the mouth portion 102 of the container 101. It is also preferable that the height of the raised portion 86 is ensured to be high enough to prevent misalignment with the mouth portion 102 of the container 101. Such a raised portion 86 can be realized by embossing the lid 1. By embossing, a recessed portion 85 is formed on the exposed surface 70 side of the lid 1, and a raised portion 86 having a height corresponding to the depth of the recessed portion 85 is formed at a position on the opposite side corresponding to the position where the recessed portion 85 is formed. By forming recess 85 so that the contour shape of recess 85 follows the shape of mouth 102 of container 101, it is possible to form protrusion 86 so as to contact the inner surface side of edge 103 of mouth 102 of container 101, as shown in Fig. 44. Fig. 44 is a cross-sectional view showing an example in which lid 1 is placed on container 101.

[0118] By forming such a raised portion 86, when the lid 1 is placed so as to cover the opening 102 of the container 101, it becomes easy to align the lid with respect to the container 101.

[0119] (Variation 5) In the lid 1 according to the second embodiment, an upper protrusion 87 may be formed inside the joining region R as shown in FIGS. 41(a) and 41(b) (Modification 5). FIGS. 41(a) and 41(b) show an example of the lid 1 according to Modification 5. The upper protrusion 87 is preferably formed in a region that avoids the small lid piece 13. In this case, even if liquid is contained in the container 101 and leaks onto the exposed surface 70 of the lid 1, the liquid tends to flow toward the small lid piece 13 formed downstream of the upper protrusion 87. Therefore, opening the small lid piece 13 to expose the opening 12 makes it easy to return the leaked liquid to the container 101. The upper protrusion 87 may also have a slit 88 penetrating the lid 1. The slit 88 is formed to a size large enough to allow a stick-shaped object such as a straw to be inserted from the outside. The slit 88 allows liquid in the container to be sucked out using a straw or the like. In the example of FIG. 41(a), the slit 88 is formed as a structural part in which a cross-shaped cut is made in the member that constitutes the lid 1, but the structure of the slit 88 is not limited to this.

[0120] (Variation 6) In the example of FIG. 44 , the recessed portion 86 is formed by recessing the entire region inside the bonding region R. However, in the lid 1 according to the second embodiment, as shown in FIGS. 46( a) and 46(b), a partial recessed portion 89 may be formed by partially recessing the region inside the bonding region R (Modification 6). FIG. 46(a) is a plan view illustrating an example of the lid 1 according to Modification 6 of the second embodiment. FIG. 46(b) is a cross-sectional view schematically illustrating the state of the vertical section taken along line GG in FIG. 46(a). The partial recessed portion 89 is formed outside the opening 12 and in the inner region Rn. In this example, the partial recessed portion 89 has a recessed shape that forms an inclined surface that slopes downward toward the opening 12. Furthermore, in this example, a partial raised portion 91 is formed on the side of the lid 1 opposite the exposed surface in a shape corresponding to the portion where the partial recessed portion 89 is formed. The formation of the partial raised portion 91 makes it easier to position the lid 1 on the opening 102 of the container 101. As shown in Figure 46, when a partial recess 89 is formed outside the opening 12 so as to avoid the position of the opening 12, when a pressing process or the like is performed to form the partial recess 89, it is difficult for a pressing force to be applied to the portion 160 near the mouth 12, so there is no risk that the point joint 17 on the periphery of the opening forming portion 11 will be cut and the opening 12 will be opened.

[0121] (Variation 7) As shown in FIG. 51 , the lid 1 may have a window 201 formed inside the joining region R. By forming the window 201, when the lid 1 is joined and sealed to the container 101, the contents of the container 101 can be visually confirmed, allowing the contents to be easily identified and providing a sense of security. Examples of film materials used for the window 201 include those made from synthetic resins and biodegradable resins. Examples of synthetic and natural resins include olefin-based resins such as polyethylene (PE) and polypropylene (PP), styrene-based resins such as polystyrene (PS), acrylic-based resins such as polyacrylate and polymethacrylate, vinyl-based resins such as polyvinyl chloride (PVC) and polyvinyl acetate, polyamide-based resins, polyimide-based resins, polyester-based resins such as polyethylene terephthalate (PET), fluorine-based resins, polycarbonate-based resins (PC), and polyether-based resins such as polyether ether ketone (PEEK) and polyethersulfone (PES). Examples of biodegradable resins include microbially produced biodegradable resins such as polyhydroxyalkanoates (PHAs) and PHA-based copolymers; natural product-based biodegradable resins such as cellulose derivatives such as cellulose acetate and starch-based resins made primarily from starch such as corn starch; lactic acid-based resins such as polylactic acid (PLA), polylactic acid / polycaprolactone copolymers, and polylactic acid / polyether copolymers; succinate-based resins such as polybutylene succinate (PBS), polybutylene succinate adipate (PBSA), and polyethylene terephthalate succinate (PETS); chemically synthesized biodegradable resins such as polycaprolactone and polyvinyl alcohol (PVA); and other biodegradable resins such as polyglycolic acid (PGA), polybutylene adipate / terephthalate, and biodegradable polyolefins (trade names: Biorecover, Cra Drop, etc.). Among these, biodegradable resins are preferred because they cause less environmental pollution. When the product to be stored in the container is a liquid, a material with excellent water resistance and oil resistance is preferred.

[0122] (Variation 8) As shown in Fig. 52, the lid 1 may be raised on the inside of the joining region R. By forming such a raised raised portion 202, the space for storing the contents in the container 101 can be increased, and for example, when the contents are liquid such as coffee, even when a creamy substance is placed on top of the liquid, it is possible to significantly reduce contact with the back surface of the lid 1. The height of this raised portion 202 may be determined arbitrarily.

[0123] Note that each aspect of the second embodiment of the lid of the present invention may be applied to each aspect of the first embodiment. For example, the configurations of the window and raised portion described in Modifications 7 and 8 of the second embodiment can be applied to the lid of the first embodiment, and configurations other than the window and raised portion may also be applied to the lid of the first embodiment as appropriate.

[0124] (Application example) The lid 1 according to the second embodiment can be used in a lidded container 150 as shown in Fig. 38. Fig. 38 is a cross-sectional view showing an example in which the lid 1 according to the second embodiment is joined to the edge 103 of the mouth 102 of a container 101 having the mouth 102. The joining method of 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. do.

[0125] Container 101 has a main body having a cylindrical side wall 104 and a bottom surface 107 whose diameter increases in the upward direction, forming a space 105 therein, and a mouth 102 that opens at the upper end of the main body (the upper end of side wall 104). Although not shown, mouth 102 of container 101 is formed in a circular shape. However, container 101 shown here is an example and is not intended to limit the configuration of container 101. For example, the mouth of the container may be formed in a rectangular shape. The container may be any type as long as the mouth 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.

[0126] In the container shown in Fig. 38, a curled portion 108 formed by outwardly winding a member forming the body of the container is formed at edge 103 of mouth 102, but container 101 is not limited to this. The end face of sidewall 104 may be exposed at edge 103 of mouth 102, or, as shown in Fig. 42, edge 103 of mouth 102 may be formed with flange 110 extending toward the outside of mouth 102 of container 101. In the example of Fig. 41, container 101 and lid 1 are joined by flange 110.

[0127] The lid according to the second embodiment may be combined with a container having a mouth.

[0128] What has been explained in the description of the second embodiment may be applied to the lid of the first embodiment as long as the effects of the invention are not lost. The application example may also be applied to the lid of the first embodiment. Note that what has been explained in the description of the first embodiment may also be applied to the lid of the second embodiment as long as the effects of the invention are not lost.

[0129] As explained above, the lid 1 according to the present invention can be applied to many of these lid body configurations. It can also be applied to lid body 1 configurations other than those described above. The lid according to the present invention has been described in detail above, but the above are merely examples of the lid according to the present invention and are not limited to these. Therefore, appropriate modifications may be made without departing from the spirit 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.

[0130] The present invention described above encompasses the following technical ideas. (1) A lid formed so as to be able to open and close the mouth of a container, A top surface portion is provided which is formed to cover the opening portion when the lid is closed, The top surface portion has a small lid piece and an opening formed when the small lid piece is lifted up, The small lid piece has a joining portion joined to one end of the tab member, The joint is formed in a part of the small lid piece, the tab member has a tab portion formed at the other end thereof and a holding piece formed between the joint portion and the tab portion, The top surface portion is formed with an insertion portion into which the holding piece is inserted, The retaining piece is formed so as to protrude from the tab member when inserted into the insertion portion, and is formed so that the small lid piece can be inserted into the insertion portion to maintain the open state. (2) The top surface portion has an edge portion, The small lid piece has a cut end portion located near the center of the top surface portion and a tip portion located on the edge portion side, The lid according to (1) above, wherein the joint is formed closer to the tip end. (3) The lid body according to (1) or (2) above, wherein a non-jointed portion is formed between the small lid piece and the tab member. (4) A lid body according to any one of (1) to (3) above, wherein the position where the non-jointed portion is formed is closer to the center of the top surface portion than the position where the joined portion is formed. (5) The lid according to any one of (1) to (4) above, wherein the tab member has a bent portion formed at the end portion on the other end side of the joint portion. (6) The tab member has a main body portion between the joint portion and the knob portion, The lid according to any one of (1) to (5) above, wherein the holding piece is formed on the main body portion and is formed so as to protrude from the main body portion. (7) A lid body according to any one of (1) to (6) above, wherein the gripping portion is formed so as to stand up relative to the main body portion when the holding piece protrudes from the main body portion. (8) The lid according to any one of (1) to (7) above, wherein the holding piece is formed so as to protrude from the knob side toward the joint side. (9) A lid body according to any one of (1) to (8) above, wherein the insertion portion has a main portion into which the holding piece is inserted and an auxiliary portion that intersects with the main portion. (10) The main portion and the auxiliary portion are formed continuously, The lid according to (9) above, wherein the auxiliary portion is formed so that the end portion opposite to the continuous portion that is continuous with the main portion faces in a different direction. (11) The lid body according to any one of (1) to (10) above, wherein the tab member has a pattern imitating a human facial expression on the grip portion. (12) The lid body according to (11) above, wherein the pattern has a different appearance before and after the holding piece is protruded. (13) The lid according to any one of (1) to (12) above, wherein the tab member has a display portion for displaying a predetermined indication. (14) The lid body according to (13) above, wherein the display portion has a marking indicating the type of contents contained in the container. (15) The cover according to (13) to (14) above, wherein the display section is formed on the main body section and is formed so as to be bendable relative to the main body section. (16) The display unit has a front surface and a back surface, The cover according to any one of (13) to (15) above, wherein the markings are provided on the front and back surfaces. (17) The lid according to any one of (13) to (16) above, wherein the display unit has a folding assist portion formed at a folding point relative to the main body unit. (A1) A lid formed so as to be able to open and close the mouth of a container, a top surface portion formed to cover the opening portion when the container is closed in a state where the cap is attached to the container; The top surface portion includes a small lid piece and an opening formed when the small lid piece is lifted up. a tab member joined to the small lid piece, The small lid piece has a joining portion joined to one end of the tab member, The tab member has a knob portion formed at the other end thereof. Lid body. (A2) A lid having a joining area to be joined to the periphery of the mouth of a container, The container has a shape that covers the mouth when joined to the container, The container comprises a small lid piece, a tab member joined to the small lid piece, and an opening formed when the small lid piece is pulled up, The small lid piece is provided inside the joining area, One end of the tab member and the small lid piece are joined together, When the joint portion between the one end portion and the portion near the tip is a joint portion, The tab member has a knob portion formed at the other end thereof. Lid body. (A3) The tab member has a holding piece formed between the joint portion and the knob portion, and is formed so that the holding piece protrudes from the tab member when the knob portion is pinched to open the small cover piece, The top surface portion is formed with an insertion portion into which the protruding holding piece is inserted, The lid body according to (A1) above, which is configured so that the holding piece can be inserted into the insertion portion to maintain the small lid piece in an open state. (A4) The tab member has a holding piece formed between the joint portion and the knob portion, and is formed so that the holding piece protrudes from the tab member when the knob portion is pinched to open the small cover piece, An insertion portion into which the protruding holding piece is inserted is formed, The lid body according to (A2) above, which is configured so that the holding piece can be inserted into the insertion portion to maintain the small lid piece in an open state. (A5) The lid according to (A3) or (A4) above, wherein the knob portion is formed so as to stand up when the holding piece is inserted into the insertion portion. (A6) The lid according to any one of (A3) to (A5) above, wherein the holding piece is formed so as to protrude from the knob side toward the joint side. (A7) The lid according to any one of (A3) to (A6) above, wherein the insertion portion has a main portion into which the holding piece is inserted and an auxiliary portion that intersects with the main portion. (A8) The lid according to any one of (A3) to (A7) above, wherein the tab member has a pattern imitating a human facial expression on the gripping portion. (A9) The lid according to (A8) above, wherein the pattern changes three-dimensionally before and after the holding piece is protruded. (A10) having an exposed surface when joined to the container, A lid body as described in (A2) above, wherein at least a portion of the outer peripheral edge of the small lid piece extends along the inner edge of the joining area and is formed outside the intersection position between the exposed surface and the extension of the inner peripheral surface of the container when joined to the container. (A11) The small lid piece has a facing surface facing the outer peripheral end surface of the small lid piece when the small lid piece is closed, The lid body according to any one of (A1) to (A10) above, wherein when the small lid piece is opened from the closed state, at least a part of the outer peripheral end surface rubs against the opposing surface. (A12) The lid according to any one of (A1) to (A11) above, wherein a window is formed in the top surface. (A13) The lid according to any one of (A1) to (A12) above, wherein the top surface portion has a raised portion where at least a part of the top surface portion is raised. (A14) A lid according to any one of (A1) to (A13) above, which is made of a paper-based material. (A15) A combination of a container and a lid, comprising a container having a mouth and the lid described in any one of (A1) to (A14) above. (A16) A container having a mouth and a lid according to any one of (A1) to (A14), A container with a lid, the mouth of which is covered with a lid. [Explanation of symbols]

[0131] 1: Lid 2: Canopy 2a:Top section 2b: Surface 2c: Back 3: Side wall 3a: Exterior wall 3b:Top edge 3c: Bottom edge 3d: step 4: Rising section 4a: Inner surface 5: Upper wall 5a: Inner surface 6: Lower wall 7: Engagement part 8: Bottom end 9: Folded section 9a: Opposite surface 10: Bottom junction 11:Aperture forming part 12: Opening 12a: One end side end 13: Small lid piece 13a: One end 13b: Other end 14: Hinge part 15: Folding line 16: Cut line 17: Point joint 18: Stress relief section 21: Tab member 21a: One end 21b: Other end 22: Joint 23: Holding piece (holding part) 23a: Cut line 23b:Tip 23c: Fold line 24: Knob 24a: Display section 24b: Design 26: Insertion part 26a: Main section 26b: Auxiliary part 31: Folding line 41: Curl section 51: Inclined part 52: Induction part 61: Falling part 70:Exposed surface 71: Outer edge 72: Periphery 73: Outer edge 73a: End face 74: Hinge connection part 75: Front edge 76: Side edge 77: Facing surface 78: Contact area 79: Compression section 80: Groove 81: Half cut section 82: Protrusion 83: Picking 84: Label 85: Recessed part 86: Protuberance 86a: Outer edge 87: Upper ridge 88: Slit 101: Container 102: Mouth 103: Edge 104: Side wall 105: Spatial part 106: Inner wall 107: Bottom part 108: Curl section 110: Collar 121:Protruding wall 150: Container with lid 160: Area near the opening F :Force M1: Extension surface M2: Surface R: Junction area RA: Common-law marriage Rn: Inner area X: Dashed line area a : arrow θ: angle

Claims

1. The container is provided with a top surface portion formed in a shape that covers the mouth portion of the container, the top surface portion having a small lid piece and an opening portion that is formed when the small lid piece is pulled up, and a tab member that is joined to the small lid piece, The tab member is One end portion and The other end portion; a knob portion formed on the other end portion; a holding piece formed between the one end and the other end and formed to protrude by operation of the tab member, The small lid piece has a joining portion that joins with the tab member, The top portion is The outer periphery and a joining area corresponding portion to be joined to an edge portion formed on the periphery of the mouth portion; a tab formed outward from the outer periphery; an opening formed when the small lid piece is pulled up; an insertion portion into which the protruding holding piece is inserted; A lid body having the above structure.

2. The lid according to claim 1 , wherein the tab is marked.

3. The lid according to claim 2 , wherein the marking is formed by printing.

4. The cover according to claim 2 , wherein the markings are formed by projections and recesses.

5. The closure of claim 2 , wherein the indicia are formed by a cutout.

6. The closure of claim 1 having a label formed thereon.

7. The lid according to claim 6 , wherein the label is formed near the tab.

8. The lid according to claim 6 , wherein a plurality of the labels are formed.

9. The lid according to claim 6 , wherein the label is formed so as to be foldable along the outer periphery.

10. The lid according to claim 6, wherein the label has a folding portion formed thereon to make the label easier to fold.

11. A window portion is formed inside the bonding area corresponding portion. The lid according to claim 1 .

12. an inner region corresponding to the inside of the bonding region corresponding portion; An opening and a small lid piece that opens and closes the opening are formed in the inner region, The small lid piece has one end and the other end, The one end is formed to be a free end, and the other end is formed to be a fixed end, The knob is formed at a portion including a position farthest from the one end. The lid according to claim 1 .

13. an inner region of the bonding region corresponding portion; A small lid piece formed in the inner region; an opening formed when the small lid piece is pulled up; a tab member having one end and the other end, the one end being formed with a joining portion to be joined to the small lid piece, and the other end being formed with a tab portion, the tab member includes a holding piece formed between the joint portion and the tab portion, An insertion portion into which the protruding holding piece is inserted is formed in the inner region, The holding piece is inserted into the insertion portion, and the small lid piece is pulled up, so that the opening can be maintained in an open state. The lid according to claim 1 .

14. The lid body according to claim 13, wherein the holding piece is formed so as to protrude from the tab member when the knob portion is pinched and the small lid piece is pulled up.

15. The lid according to claim 13 , wherein the tab portion is formed so as to stand up when the holding piece is inserted into the insertion portion.

16. The lid according to claim 13 , wherein the holding piece is formed so as to protrude from the knob side toward the joint side.

17. The lid according to claim 13 , wherein the insertion portion has a main portion into which the holding piece is inserted and an auxiliary portion that intersects with the main portion.

18. The lid according to claim 13, wherein the tab member has a pattern imitating a human facial expression on the gripping portion.

19. The cover according to claim 18, wherein the pattern changes three-dimensionally before and after the holding piece is protruded.

20. having an exposed surface when bonded to the container; The lid body described in claim 13, wherein at least a portion of the outer peripheral edge of the small lid piece extends along the inner edge of the joining area corresponding portion and is formed outside the intersection position of the exposed surface and the extension plane of the inner peripheral surface of the container when joined to the container.

21. a facing surface facing the outer peripheral end surface of the small lid piece when the small lid piece is closed; The lid body according to claim 13 , wherein when the small lid piece is opened, at least a part of the outer peripheral end surface and the facing surface rub against each other.

22. The lid according to claim 1 , wherein the top surface portion has a raised portion inside the corresponding joint area, the raised portion being at least a part of the top surface portion.

23. The lid according to claim 1 , which is made of a paper-based material.

24. A container having a mouth and a lid according to any one of claims 1 to 23. A combination of a container and a lid.

25. A container having a mouth and the lid according to any one of claims 1 to 23, A container with a lid, the opening of which is covered with the lid.

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