Lid for beverage container and beverage container

Abstract

To provide a lid for beverage containers and a beverage container having the same, capable of opening a seal at a drinking port through one action, with a hinge part being difficult to break.SOLUTION: In a lid 1 for beverage containers having a covering plate part 4 that covers the opening of a beverage container and a side peripheral part 5 that can engage with the edge part of the opening: a push-in part 7 that is formed on the covering plate part 4, surrounded by a cutting line part 70 and pushed down by a finger, and a tap part 8 that is formed on the covering plate part 4 adjoining the push-in part 7, surrounded by a cutting line part 80, and lifted up by reaction force when the push-in part 7 is pushed down are provided; the tap part 8 is made closer to the side peripheral part than the push-in part 7; a tap part end 83 which is the end part of the cutting line part 80 surrounding the tap part 8 and a push-in part end 73 which is the end part of the cutting line part 70 surrounding the push-in part 7 are separated from each other; the tap part end 83 is not located on an extension of the cutting line part 70 surrounding the push-in part 7; and the push-in part end 73 is not located on an extension of the cutting line part 80 surrounding the tap part 8.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a lid for a beverage container which covers an opening of the beverage container, and a beverage container provided with the lid. [Background technology]

[0002] Conventionally, many beverage retailers, such as fast food restaurants and convenience stores, sell beverage containers, such as plastic (synthetic resin) or paper cups, with beverage container lids that cover the openings to prevent the juice, coffee, or other beverages contained inside from spilling out of the opening when the containers are carried.

[0003] To drink the beverage contained inside the beverage container, one can simply remove the beverage container lid and drink from the opening, but when the beverage container lid is removed, the beverage adhering to the inside of the lid may splash out, potentially staining the drinker's clothes, etc.

[0004] For example, Patent Document 1 discloses a lid for a beverage container that has a straw insertion portion in which an attached straw can be inserted to make it easier to drink the beverage inside the beverage container (see claim 1 in the claims of Patent Document 1, paragraphs

[0036] to

[0058] of the specification, Figures 1 to 7 of the drawings, etc.).

[0005] However, in recent years, triggered by issues such as marine pollution caused by plastic waste, there has been a growing global movement to move away from plastic, and as part of this, there is also a growing movement to eliminate plastic straws.

[0006] Under these circumstances, there is a demand in the market for a beverage container lid that does not require a straw and can form a drinking spout that makes it easy to drink a beverage without removing the beverage container lid. For this reason, in addition to the technology disclosed in Patent Document 1, a push-down type has also been proposed in which the drinking spout is formed by making a valley fold in the part of the beverage container lid that forms the drinking spout.

[0007] However, this push-down type requires consumers to perform a two-step opening action to form the drinking spout, which makes it difficult for consumers to intuitively understand how to form the drinking spout. For this reason, there has been a demand for a beverage container lid that simplifies the opening action itself so that it can be achieved in one step, allowing consumers to intuitively understand how to form the drinking spout.

[0008] Therefore, in Patent Document 2, a beverage container lid 1 was developed in which a drinking spout (drinking spout 110) is formed consisting of a push-in portion, that is, a portion for opening the drinking spout 12A and a portion for forming the drinking spout 11A, separated by a linear perforation (low-strength portion for folding 14), and a seesaw-type (push-up type) drinking spout is formed in which the drinking spout can be opened by pushing down the portion for opening the drinking spout 12A with a finger and lifting the portion for forming the drinking spout 11A in reaction (see claim 1 in the claims of Patent Document 2, paragraphs

[0024] to

[0036] of the specification, Figures 2 to 4 of the drawings, etc.).

[0009] A seesaw-type drinking spout, such as the lid for a beverage container described in Patent Document 2, can be opened in one step by simply pressing down the push-in part with a finger, which has the advantage that consumers can intuitively understand how to form the drinking spout and that anyone can quickly open the drinking spout without an instruction manual. However, because the drinking spout is opened by twisting the hinge part, there is a problem in that the hinge part will break if the push-in part is pressed too hard with a finger. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] JP 2021-14286 A [Patent Document 2] JP 2023-6268 A Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention has been devised in consideration of the above-mentioned background, and its object is to provide a lid for a beverage container whose drinking spout can be opened in one step and whose hinge portion is not easily torn, and a beverage container equipped with the lid. [Means for solving the problem]

[0012] The lid for a beverage container according to the first invention is a lid for a beverage container comprising a cover plate portion for covering an opening of a beverage container, and a side periphery provided on the outer periphery of the cover plate portion and capable of engaging with the edge of the opening of the beverage container when the cover plate portion is adapted to cover the opening of the beverage container, the lid further comprising a push-in portion formed on the cover plate portion and surrounded by a cutting line portion consisting of a low-strength portion or a cut line portion having a lower strength than a general portion of the cover plate portion, the push-in portion being pushed downward with a finger, and a cut-in portion formed on the cover plate portion adjacent to the push-in portion and surrounded by a cutting line portion consisting of a low-strength portion or a cut line portion having a lower strength than a general portion of the cover plate portion, the cut-in portion being pushed downward with a finger, and a drinking spout portion that is surrounded by a cutting line portion consisting of a first portion and a second portion and that is lifted upward by the reaction force of the push-in portion being pushed downward, wherein the drinking spout portion is located closer to the side periphery than the push-in portion, a drinking spout portion end that is an end of the cutting line portion surrounding the drinking spout portion and a push-in portion end that is an end of the cutting line portion surrounding the push-in portion are spaced apart from each other, the drinking spout portion end is not on an extension of the cutting line portion surrounding the push-in portion, and the push-in portion end is not on an extension of the cutting line portion surrounding the drinking spout portion.

[0013] The lid for a beverage container according to the second invention is characterized in that, in the first invention, the hinge angle formed by a line connecting the drinking spout end and the push-in end relative to a line connecting the drinking spout ends is 30° to 80°.

[0014] The lid for a beverage container according to the third invention is characterized in that, in the second invention, the boundary between the drinking spout and the push-in portion is defined by a dividing line portion consisting of the low-strength portion or the cut line portion.

[0015] The lid for a beverage container of the fourth invention is characterized in that, in the third invention, the width of the push-in portion is wider than the width of the drinking spout portion, and the distance from the dividing line portion to the end of the drinking spout portion on the side peripheral portion side is longer than the distance from the dividing line portion to the end of the push-in portion on the central side.

[0016] A beverage container according to a fifth aspect of the present invention is characterized by comprising a container body and a beverage container lid according to any one of the first to fourth aspects of the present invention. Effect of the Invention

[0017] According to the first to fifth inventions, the spout is a seesaw type, and can be opened in one step by simply pressing down the push-in portion with a finger, so that consumers can intuitively understand how to form the spout, and anyone can quickly open the spout without an instruction manual. Also, according to the first to fifth inventions, the spout end, which is the end of the cutting line portion surrounding the spout, and the push-in end, which is the end of the cutting line portion surrounding the push-in portion, are spaced apart from each other, and the spout end is not on an extension of the cutting line portion surrounding the push-in portion, and the push-in end is not on an extension of the cutting line portion surrounding the spout, so that the hinge portion is unlikely to break even if the push-in portion is pressed hard.

[0018] In particular, according to the second invention, the hinge angle formed by the straight line connecting the drinking spout end and the push-in portion end relative to the straight line connecting the drinking spout ends is 30° to 80°, not only making the hinge portion less likely to break, but also preventing the push-in portion from rotating more than half a turn and getting in the way when drinking a beverage from the drinking spout portion.

[0019] In particular, according to the third aspect of the invention, the boundary between the spout portion and the push-in portion is defined by a dividing line, making it easy to fold and open the spout portion and easy to drink a beverage from the spout portion.

[0020] In particular, according to the fourth invention, the width of the push-in portion is wider than the width of the drinking spout portion, and the distance from the dividing line portion to the end of the drinking spout portion on the side periphery side is longer than the distance from the dividing line portion to the end of the pushing-in portion on the opposite side periphery, so that the drinking spout portion can be hooked onto the edge of the cover plate portion on the opposite side periphery of the pushing-in portion, and the beverage can be drunk with the drinking spout portion fully open. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is an exploded perspective view showing a beverage container according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view showing a lid for a beverage container according to an embodiment of the present invention. [Diagram 3] FIG. 3 is a partially enlarged plan view showing the drinking spout of the beverage container lid of the above. [Figure 4] FIG. 4 is a plan view showing the drinking spout of the same as above with the drinking spout portion fully open. [Diagram 5] FIG. 5(a) is an enlarged view of part A of the hinge portion of the lid for a beverage container shown in FIG. 3, and FIG. 5(b) is a schematic cross-sectional view showing the hinge portion of the lid for a beverage container shown in FIG. [Figure 6] Figure 6(a) is a partially enlarged plan view showing the drinking spout of a beverage container lid according to variant example 1 having a hinge angle of 0°, which corresponds to Figure 3, and Figure 6(b) is an enlarged plan view showing the state in which the drinking spout has been opened by pressing the push-in portion of the drinking spout with a finger. [Figure 7] Figure 7(a) is a partially enlarged plan view showing the drinking spout of a beverage container lid according to variant example 2 having a hinge angle of 90°, which corresponds to Figure 3, and Figure 7(b) is an enlarged plan view showing the state in which the drinking spout has been opened by pressing the push-in portion of the drinking spout with a finger. [Figure 8] FIG. 8 is a partially enlarged plan view showing an enlarged drinking spout of a lid for a beverage container according to a third modified example having a hinge angle of 20°, which corresponds to FIG. [Figure 9] FIG. 9 is a partially enlarged plan view showing an enlarged drinking spout of a lid for a beverage container according to a fourth modified example having a hinge angle of 80°, which corresponds to FIG. [Figure 10]FIG. 10 is a partially enlarged plan view showing an enlarged drinking spout of a lid for a beverage container according to a fifth modified example having a hinge angle of 45°, which corresponds to FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0023] <Beverage container> First, a beverage container 2 according to an embodiment of the present invention will be described with reference to Fig. 1. Fig. 1 is an exploded perspective view of the beverage container 2 according to an embodiment of the present invention.

[0024] A beverage container 2 according to an embodiment of the present invention includes a paper container body 3 and a beverage container lid 1 according to an embodiment of the present invention fitted onto this container body 3, as shown in FIG.

[0025] The container body 3 is a paper cup with a bottom, which has an opening 3a with a rim 3b at its upper part and expands in diameter like an inverted truncated cone as it goes upwards, and is often used to store and sell beverages b such as coffee or tea inside.

[0026] The container body 3 is not limited to being made of paper, and may be made of other materials such as plastic. However, using paper for the container body 3 is preferable because it not only reduces the amount of plastic used, but also makes it easy to melt into pulp and recycle, and can be incinerated, eliminating the problem of microplastics. If the container body 3 is made of plastic, it is preferable to use an environmentally friendly biodegradable plastic.

[0027] This beverage container 2 is closed by fitting a beverage container lid 1, which will be described later, onto the edge 3b of the opening 3a of the container body 3, making it easy to transport the container with the beverage b inside, and the container can be displayed and sold in various stores, etc. as a packaging container.

[0028] <Lids for beverage containers> Next, the lid 1 for beverage containers according to an embodiment of the present invention will be described with reference to Fig. 2 to Fig. 5. Fig. 2 is a plan view showing the lid 1 for beverage containers according to this embodiment, and Fig. 3 is a partially enlarged plan view showing the drinking spout 6 of the lid 1 for beverage containers. Fig. 4 is a plan view showing the drinking spout 6 of the lid 1 for beverage containers with the drinking spout portion 8 fully open.

[0029] As shown in Figure 2, the lid 1 for a beverage container is a single-piece drawn paper lid and includes a disk-shaped covering plate portion 4 that covers the opening 3a of the beverage container 2, and a side peripheral portion 5 that is provided on the outer periphery of the covering plate portion 4 and can engage with the edge portion 3b of the opening 3a of the beverage container 2 when the covering plate portion 4 is arranged to cover the opening 3a of the beverage container 2.

[0030] The beverage container lid 1 is not limited to being made of paper, and may be made of other materials such as plastic. However, the beverage container lid 1 is preferably made of paper, since it can be easily recycled by melting it into pulp and can be incinerated, which solves the problem of microplastics. If the beverage container lid 1 is made of plastic, an environmentally friendly biodegradable plastic may be used.

[0031] (Taste) In addition, a seesaw-type (push-up type) drinking spout 6 is formed on the cover plate 4. This drinking spout 6 is composed of a push-in part 7 that is pushed downward with a finger, and a drinking spout part 8 that is lifted upward by the reaction force of the push-in part 7 being pushed downward, and the drinking spout part 8 is located closer to the side periphery part 5 (periphery side) than the push-in part 7.

[0032] The push-in portion 7 is configured to be surrounded on three of the four sides, except for one side adjacent to the drinking spout portion 8, by a cutting line portion 70 consisting of a cut line portion cut through the cover plate portion 4. However, the cutting line portion 70 does not have to be a cut line portion cut all the way through the cover plate portion 4, and may be a low-strength portion having lower strength than the general portion of the cover plate portion 4, such as a perforation, half cut, or crease that partially cuts the cross section of the paperboard material of the cover plate portion 4.

[0033] As shown in Figure 3, this cutting line portion 70 is composed of a straight-line hanging edge 71 that extends perpendicular to the radial direction of the cover plate portion 4 and hangs onto the drinking spout portion 8, and a pair of arc-shaped side edges 72 that are folded back toward the periphery from both ends of this hanging edge 71.

[0034] The drinking spout 8 is configured such that it is surrounded on three of its four sides, except for one of the sides adjacent to the push-in section 7, by a cutting line section 80 consisting of a cutting line section cut through the cover plate section 4. However, like the cutting line section 70 described above, the cutting line section 80 does not have to be a cutting line section cut all the way through the cover plate section 4, but may be a low-strength section that has lower strength than the general section of the cover plate section 4, such as a perforation, half cut, or crease that partially cuts the cross section of the paperboard material of the cover plate section 4.

[0035] As shown in Figure 3, this cutting line portion 80 is provided on the peripheral side along the side peripheral portion 5 and is composed of an arc-shaped peripheral edge 81 which is the edge along which the beverage b actually passes when the beverage b is drunk, and a pair of left and right straight side edges 82 which are folded back from both ends of this peripheral edge 81 toward the center along the radial direction of the cover plate portion 4, forming an overall U-shape.

[0036] 2 and 3, the boundary between the push-in portion 7 and the mouth portion 8 is defined by a dividing line portion 9. This dividing line portion 9 is made of a cut line portion cut through the cover plate portion 4, but it may also be a linear low-strength portion that connects the ends of the cut line portion 80 and has lower strength than the general portion of the cover plate portion 4, such as the perforations, half cuts, and creases described above. However, since the push-in portion 7 and the mouth portion 8 need to move in conjunction with each other like a seesaw, it is preferable that a portion where the entire cross section of the paperboard material of the cover plate portion 4 at the boundary between the push-in portion 7 and the mouth portion 8 is continuously connected remains, as in the illustrated form.

[0037] 3, the width W1 of the push-in portion 7 is wider than the width W2 of the drinking spout portion 8, and the distance D2 from the dividing line portion 9 to the end of the drinking spout portion 8 on the side periphery side is longer than the distance D1 from the dividing line portion 9 to the end of the central side of the push-in portion 7. For this reason, as shown in FIG. 4, the drinking spout portion 8 is bent in a valley fold along the dividing line portion 9, and the peripheral edge 81 of the drinking spout portion 8 can be inserted and hooked under the hook edge 71 (the edge of the cover plate portion 4) on the central side (opposite the side periphery) of the push-in portion 7, so that the beverage b can be drunk from the drinking spout portion 8 with the drinking spout portion 8 fully open without pressing it with a finger.

[0038] Although the side 72 of the push-in portion 7 has been described as being arc-shaped, the side 72 may be linear in shape in accordance with the side 82. However, as shown in the figure, the width W1 of the push-in portion 7 is wider than the width W2 of the mouth portion 8, which is the distance between the side edges 82, and the side edges 72 are arc-shaped, so that a crescent-shaped aroma window is formed around the nose when drinking beverage b from the mouth portion 8, and when beverage b is a highly aromatic beverage such as coffee, black tea, or green tea, the aroma can be enjoyed, which is preferable.

[0039] (Hinge part) 3, the push-in portion end 73, which is the end of the side edge 72 of the cutting line portion 70 of the push-in portion 7, and the drinking spout portion end 83, which is the end of the side edge 82 of the cutting line portion 80 of the drinking spout portion 8, are spaced a specified distance (3 mm in this embodiment). This is because the space between the push-in portion end 73 and the drinking spout portion end 83 becomes a hinge portion when the push-in portion 7 is pushed in with a finger to open the drinking spout portion 8, that is, when the push-in portion 7 and the drinking spout portion 8 are rotated in a seesaw manner, and if the paperboard material of the cover plate portion 4 is not left a certain distance, this hinge portion will be twisted and broken when rotated.

[0040] Next, the hinge portion will be described in more detail with reference to Fig. 5. Fig. 5(a) is an enlarged view of part A of the hinge portion of the lid 1 for beverage containers in Fig. 3, and Fig. 5(b) is a schematic cross-sectional view of the hinge portion of the lid 1 for beverage containers. The reason why the hinge portion of the seesaw-type drinking spout 6 breaks is that, as shown in Fig. 5(b), if the positions of the drinking spout end 83, which is the fulcrum of the seesaw (lever), and the pushing-in end 73 are apart in the vertical cross section of the cover plate 4, the pushing-in end 73, which is the starting point of the pushing-in, tries to approach the drinking spout end 83, which is the starting point of the rising, and the hinge portion connecting them breaks. That is, the cut portion of the paperboard material of the cutting line portion 80 (cutting line portion 70) extends from the drinking spout end 83 along the dotted line X and breaks when it reaches the pushing-in end 73. Similarly, the cut portion of the paperboard material at the cutting line portion 70 extends from the push-in portion end 73 along the dotted line Y, and when it reaches the push-in portion end 73, the hinge portion breaks.

[0041] However, as shown in FIG. 5(a), in the beverage container lid 1 according to this embodiment, the push-in end 73 is not on the extension of the cutting line 80 surrounding the spout 8, i.e., on the extension of the straight side 82 (it is in the part excluding the extension line; the same applies below). Therefore, even if the cut part of the paperboard material of the cutting line 80 extends along the dotted line X, it does not reach the push-in end 73, the paperboard material of the cover plate 4 remains, and the hinge portion does not break completely. Similarly, the spout end 83 is not on the extension of the cutting line 70 of the push-in portion 7, i.e., on the extension (tangent) of the arc-shaped side 72. Therefore, even if the cut part of the paperboard material of the cutting line 70 extends along the dotted line Y, it does not reach the spout end 83, the paperboard material of the cover plate 4 remains, and the hinge portion does not break completely.

[0042] (hinge angle) Next, the hinge angle will be described in more detail with reference to Fig. 3 and Figs. 6 to 10. Here, the hinge angle refers to the angle between the straight line connecting the drinking spout ends 83 and the push-in end 73 and the straight line connecting the drinking spout ends 83, as shown in Fig. 3. The hinge angle of the seesaw-type drinking spout 6 of the beverage container lid 1 according to this embodiment is 30°. Regarding this hinge angle, the inventors of the present application created a number of beverage container lids according to Modifications 1 to 4 shown in Figs. 6 to 9, which have different hinge angles, and conducted experiments and studies on usability when opening the drinking spout.

[0043] [Variation 1] Fig. 6(a) is a partially enlarged plan view showing the spout 6 of the beverage container lid 11 according to the first modified example with a hinge angle of 0°, which corresponds to Fig. 3, and Fig. 6(b) is an enlarged plan view showing the state in which the pushing portion 7 is pushed in with a finger to open the spout portion 8. Hereinafter, the same components as those described above are given the same reference numerals, and detailed explanations will be omitted.

[0044] As shown in Fig. 6, the drinking spout 6 of the lid 11 for beverage containers according to the first modification with a hinge angle of 0° has an advantage that the hinge part is easily twisted but the breaking part does not extend and the hinge part is not easily broken because the hinge part and the rotation axis are parallel. Also, the lid 11 for beverage containers according to the first modification has an advantage that the hinge part is easily twisted and the tab of the drinking spout part 8 is lifted with a weak force, making it easy to open because the hinge part and the rotation axis are parallel.

[0045] However, the beverage container lid 11 according to the first modification has the disadvantage that the push-in portion 7 and the drinking spout portion 8 rotate with a weak force, so that as shown in Fig. 6(b), the push-in portion 7 rotates half a turn, interfering with drinking the beverage b from the drinking spout portion 8. In addition, the beverage container lid 11 according to the first modification has the disadvantage that if the push-in portion 7 is pressed hard with a finger, the finger and the push-in portion 7 come into contact with the beverage b inside the container body 3 and become immersed in it.

[0046] [Variation 2] Figure 7(a) is a partially enlarged plan view showing the drinking spout 6 of a beverage container lid 12 relating to variant example 2 having a hinge angle of 90° corresponding to Figure 3, and Figure 7(b) is an enlarged plan view showing the state in which the pushing portion 7 is pushed in with a finger to open the drinking spout portion 8.

[0047] As shown in Fig. 7, the lid 12 for a beverage container according to Modification 2 with a hinge angle of 90° has an advantage that the hinge portion has resistance to rotation because the hinge portion and the rotation axis are perpendicular, and the push-in portion 7 does not rotate half a turn and does not get in the way when drinking the beverage b from the drinking spout 8. In addition, the lid 12 for a beverage container according to Modification 2 has an advantage that the hinge portion has resistance to rotation, and there is little risk that the finger or the push-in portion 7 will come into contact with and become immersed in the beverage b inside the container body 3 even if the push-in portion 7 is pushed in strongly.

[0048] However, the beverage container lid 12 according to the second modification has the disadvantage that the hinge and the rotation axis are perpendicular, so that the breaking portion of the cutting line portion 70 and the cutting line portion 80 tend to extend and the hinge portion tends to break. Also, the beverage container lid 12 according to the second modification has the disadvantage that the hinge portion has resistance to rotation, so that the drinking spout portion 8 cannot be opened unless the pushing portion 7 is strongly pressed with a finger, and therefore cannot be opened by people with weak strength such as small children.

[0049] [Variation 3] FIG. 8 is a partially enlarged plan view showing the drinking spout 6 of the beverage container lid 13 according to the third modified example having a hinge angle of 20°, which corresponds to FIG.

[0050] As shown in Fig. 8, the drinking spout 6 of the lid 13 for beverage containers according to the third modification with a hinge angle of 20° has an advantage that the hinge part is easily twisted but the breaking part does not extend and the hinge part is not easily broken because the hinge part and the rotation axis are nearly parallel to each other. Also, the lid 13 for beverage containers according to the third modification has an advantage that the hinge part is easily twisted and the tab of the drinking spout part 8 is lifted with a weak force, making it easy to open because the hinge part and the rotation axis are nearly parallel to each other.

[0051] However, the beverage container lid 13 according to the modified example 3 has a disadvantage in that the push-in portion 7 and the drinking spout portion 8 rotate with a weak force, so that the push-in portion 7 rotates half a turn and gets in the way when drinking the beverage b from the drinking spout portion 8. In addition, the beverage container lid 13 according to the modified example 3 has a disadvantage in that if the push-in portion 7 is pressed hard with a finger, the finger and the push-in portion 7 come into contact with the beverage b inside the container body 3 and become immersed in it.

[0052] [Variation 4] FIG. 9 is a partially enlarged plan view showing the drinking spout 6 of the beverage container lid 14 according to the fourth modified example having a hinge angle of 80°, which corresponds to FIG.

[0053] As shown in FIG. 9, the beverage container lid 14 according to the fourth modification with a hinge angle of 80° has an advantage that the hinge part and the rotation axis are nearly perpendicular to each other, so that the hinge part has resistance to rotation, and the push-in part 7 does not rotate half a turn and does not get in the way when drinking the beverage b from the drinking spout part 8. The beverage container lid 14 according to the fourth modification has an advantage that the hinge part has resistance to rotation, so that even if the push-in part 7 is pushed in strongly, there is little risk that the finger or the push-in part 7 will come into contact with and be immersed in the beverage b in the container body 3. And, although the beverage container lid 14 according to the fourth modification has a hinge part and a rotation axis that are nearly perpendicular to each other, the push-in part end 73 is not on the extension line of the cutting line part 80 of the drinking spout part 8, and the drinking spout part end 83 is not on the extension line of the cutting line part 70 of the push-in part 7. Therefore, the hinge part of the beverage container lid 14 according to the fourth modification is less likely to break.

[0054] However, the lid 14 for a beverage container in accordance with variant example 4 has a disadvantage in that the hinge portion has resistance to rotation, and the drinking spout portion 8 cannot be opened unless the pushing portion 7 is pressed hard with a finger, making it impossible for people with weak strength, such as small children, to open the lid.

[0055] [Embodiment] The drinking spout 6 of the beverage container lid 1 according to the embodiment of the present invention with a hinge angle of 30° shown in FIG. 3 has the advantage that the hinge portion has a certain degree of resistance to rotation, and the push-in portion 7 does not rotate half a turn, so it does not get in the way when drinking the beverage b from the drinking spout portion 8. The beverage container lid 1 also has the advantage that the breaking portion of the hinge portion does not extend, so the hinge portion is not easily broken. The beverage container lid 13 according to the third modification has the advantage that the hinge portion and the rotation axis are nearly parallel, so the hinge portion is easily twisted and the tab of the drinking spout portion 8 is lifted with a weak force, making it easy to open. However, the beverage container lid 1 has the disadvantage that if the push-in portion 7 is pressed hard with a finger, the finger or the push-in portion 7 will come into contact with the beverage b in the container body 3 and become immersed in it.

[0056] To summarize the results of experiments and considerations on the ease of opening the drinking spouts of multiple beverage lids with different hinge angles, the hinge angle, which is the inclination angle of the line connecting the drinking spout end 83 and the push-in end 73 relative to the line connecting the drinking spout ends 83 together, is preferably between 30° and 80° (30° to 80°).

[0057] If the hinge angle is less than 30°, the push-in portion 7 and the drinking spout portion 8 rotate with a weak force, which results in a significant disadvantage in that the push-in portion 7 rotates half a turn and gets in the way when drinking the beverage b from the drinking spout portion 8. In addition, if the push-in portion 7 is pressed hard with a finger, the finger and the push-in portion 7 will come into contact with and become immersed in the beverage b inside the container body 3.

[0058] On the other hand, if the hinge angle exceeds 80°, the fracture portions of the cutting line portions 70 and 80 tend to stretch, making the hinge portion more likely to break. In addition, the resistance to rotation in the hinge portion becomes too strong, making it impossible to open the drinking spout portion 8 unless the pushing portion 7 is pressed hard with a finger, making it impossible for people with weak strength, such as small children, to open the bottle.

[0059] As shown in Fig. 10, the hinge angle can also be applied to a case where the width W1 of the push-in portion 7 is narrower than the width W2 of the spout portion 8, and the push-in portion end 73 is located inside the spout end 83, so that the hinge angle formed by the line connecting the spout end 83 and the push-in portion end 73 with respect to the line connecting the spout ends 83 is an angle that slopes downward to the right. Fig. 10 is a partially enlarged plan view showing the spout 6 of the beverage container lid 15 according to the fifth modification example with a hinge angle of 45°, which corresponds to Fig. 3.

[0060] The lid 1 for beverage containers (beverage containers 2) according to the embodiment of the present invention and the lid 14 for beverage containers according to variant example 4 described above not only make the hinge portion less likely to break, but also prevent the push-in portion 7 from rotating more than half a turn and getting in the way when drinking a beverage from the drinking spout portion 8.

[0061] Furthermore, according to the beverage container lid 1 (beverage container 2) and the beverage container lid 14 relating to variant example 4, the width W1 of the push-in portion 7 is wider than the width W2 of the drinking spout portion 8, and the distance D2 from the dividing line portion 9 to the end of the drinking spout portion 8 on the side periphery side is longer than the distance D1 from the dividing line portion 9 to the end of the push-in portion 7 on the opposite side of the side periphery (the center side). Therefore, the drinking spout portion 8 can be hooked onto the edge of the cover plate portion 4 on the opposite side of the side periphery of the push-in portion 7, and the beverage can be drunk with the drinking spout portion 8 fully open.

[0062] Furthermore, according to the beverage container lid 1 (beverage container 2) and the beverage container lid 14 relating to variant example 4, the width W1 of the push-in portion 7 is wider than the width W2 of the drinking spout portion 8, which is the spacing between the side edges 82, and the side edges 72 are arc-shaped. As a result, as shown in FIG. 4, when drinking beverage b from the drinking spout portion 8, a crescent-shaped aroma window is formed around the nose due to the difference in shape between the arc-shaped side edges 72 and the straight side edges 82, and if beverage b is a highly fragrant beverage such as coffee or green tea, the aroma can be enjoyed.

[0063] Although the beverage container lid 1 and the beverage container 2 according to the embodiment of the present invention have been described in detail above, the above-mentioned and illustrated embodiments are merely specific embodiments for carrying out the present invention, and therefore the technical scope of the present invention should not be interpreted as being limited by these.

[0064] In particular, the beverage container lid 1 and beverage container 2 have been described as being made of paper with paper as the primary raw material, but the present invention can also be applied to items that have the same shape but different sheet materials, such as plastic caps. [Explanation of symbols]

[0065] 1: Lid for beverage containers 11 to 15: Lids for beverage containers according to modified examples 1 to 5 2: Beverage container 3: Container body 3a: opening 3b:Edge 4: Covering part 5: Side circumference 6: Mouthpiece 7: Pressing section 70: Cutting line part 71: Hanging edge 72: Side 73: Push-in end 8: Mouth part 80: Cutting line part 81: Periphery 82: Side 83: End of mouth 9: Lane section b:Beverage

Claims

1. A lid for a beverage container comprising a cover plate portion for covering an opening of the beverage container, and a side periphery portion provided on an outer periphery of the cover plate portion and capable of engaging with an edge of the opening of the beverage container when the cover plate portion covers the opening of the beverage container, A pressing portion is formed in the cover plate portion, surrounded by a cutting line portion consisting of a low strength portion or a cut line portion having a strength lower than that of the general portion of the cover plate portion, and pressed downward by a finger; A drinking spout portion is formed in the cover plate portion adjacent to the push-in portion, surrounded by a cutting line portion consisting of the low strength portion or the cut line portion, and is lifted upward by a reaction force caused by the push-in portion being pushed downward, The drinking spout is located closer to the periphery than the push-in portion, A drinking spout end, which is an end of the cutting line portion surrounding the drinking spout portion, and a pushing portion end, which is an end of the cutting line portion surrounding the pushing portion, are spaced apart from each other; The end of the mouth portion is not on an extension of the cutting line portion surrounding the push-in portion, and the end of the push-in portion is not on an extension of the cutting line portion surrounding the mouth portion. A lid for a beverage container, comprising:

2. The hinge angle between the straight line connecting the ends of the drinking spout portion and the straight line connecting the ends of the pushing portion is 30° to 80°.

2. The lid for a beverage container according to claim 1 .

3. The boundary between the mouth portion and the push-in portion is defined by a dividing line portion consisting of the low strength portion or the cut line portion.

3. The lid for a beverage container according to claim 2.

4. The width of the push-in portion is wider than the width of the mouth portion, and the distance from the dividing line portion to the end portion of the mouth portion on the side periphery side is longer than the distance from the dividing line portion to the end portion of the push-in portion on the center side.

4. The lid for a beverage container according to claim 3.

5. The present invention relates to a container body and a beverage container lid according to any one of claims 1 to 4. A beverage container characterized by:

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