Lids for beverage containers and beverage containers

Abstract

To provide a lid for a beverage container that can prevent a finger from touching a liquid surface when pressing-in a notch or the like formed in the lid for a beverage container with the finger and can simplify an opening operation so that the lid can be opened in one step, which enables a consumer to intuitively understand how to form a faucet.SOLUTION: A lid for a beverage container comprises a covering plate part 4 covering an opening part 3 of a beverage container 2, and a side periphery part 5, provided at an outer peripheral edge of the covering plate part 4, which can engage with an edge part of the opening part 3 of the beverage container 2 when the covering plate 4 covers the opening part 3 of the beverage container 2, which further comprises: a line part 11 for forming a faucet, provided at a peripheral edge side of the covering plate part 4, which has a shape of a peripheral edge side of the faucet 8 for forming the faucet 8; two line parts 12 for locking extended from an inside of a site 20 for forming the faucet surrounded by the line part 11 for forming the faucet toward a center side thereof; and a low strength part 15 for mountain-folding that facilitates mountain-folding of a lock part 30, at a side closer to the center side than one end and the other end of the line part 11 for forming the faucet, of the lock part 30 surrounded by the two line parts 12 for locking.SELECTED DRAWING: Figure 3

Description

【Technical Field】 【0001】 The present invention relates to a lid for a beverage container that covers an opening of a beverage container and a beverage container provided with this lid for a beverage container. 【Background Art】 【0002】 Conventionally, in many beverage sales stores such as fast food restaurants and convenience stores, the opening of a beverage container such as a plastic (synthetic resin) cup or a paper cup is covered with a lid for a beverage container, and when carrying it, beverages such as juice and coffee contained therein are sold so that they are unlikely to spill from the opening. 【0003】 To drink the beverage contained inside the beverage container, one can simply remove the lid for the beverage container and drink from the opening. However, when the lid for the beverage container is removed, the beverage adhering to the inside may splash and there is a risk of soiling the clothes of the person drinking. 【0004】 Therefore, in many cases, a straw insertion part is provided in the lid for the beverage container, and by inserting the attached straw, it becomes easier to drink the beverage inside the beverage container (see Patent Document 1, etc.). 【0005】 However, recently, starting from problems such as marine pollution caused by plastic waste, the global trend of reducing plastic has been growing, and as part of this, the trend of eliminating straws made of plastic has also been increasing. 【0006】 Under such circumstances, in the market, there is a demand for a lid for a beverage container that can form a drinking mouth that makes it easy to drink the beverage without removing the lid for the beverage container and without using a straw. In recent years, a push-up type that forms a drinking mouth by pushing in a cut provided in the lid for the beverage container with a finger has already been proposed, but there is also a problem that when the liquid level in the beverage container is close to the bottom of the lid, the finger that has been pushed in touches the liquid level. 【0007】 Conventionally, in addition to the technology disclosed in Patent Document 1, a push-down type has also been proposed for beverage container lids, in which the drinking spout is formed by folding a portion of the lid that forms the spout. However, this push-down type forces consumers to perform a two-step opening operation to form the spout, which has the problem that it is difficult for consumers to intuitively understand how to form the spout. For this reason, there has been a long-standing desire for a beverage container lid that simplifies the opening operation itself to a single step, so that consumers can intuitively understand how to form the spout. [Prior art documents] [Patent Documents] 【0008】 [Patent Document 1] Japanese Patent Publication No. 2021-14286 [Overview of the Initiative] [Problems that the invention aims to solve] 【0009】 Therefore, the present invention was devised in view of the above-mentioned background, and its purpose is to provide a beverage container lid and a beverage container equipped with this lid, which eliminate the need for a straw and allow consumers to intuitively understand how to form a drinking spout, by preventing the fingers from touching the liquid surface when pressing the notches or other features provided on the beverage container lid with a finger, thereby simplifying the opening process itself to a single step. [Means for solving the problem] 【0010】 The beverage container lid according to the first invention comprises a cover plate portion that covers the opening of the beverage container, and a side peripheral portion provided on the outer peripheral edge of the cover plate portion, which is capable of engaging with the edge of the opening of the beverage container when the cover plate portion covers the opening of the beverage container, wherein a notched line portion or the cover plate portion is provided on the peripheral edge side of the cover plate portion and has the shape of the peripheral edge side of the opening for forming the drinking spout. Other partsA drinking spout-forming wire section made of a lower strength portion, two locking wire sections extending from inside the drinking spout-forming area surrounded by the drinking spout-forming wire section toward the center of the cover plate section beyond one and the other end of the drinking spout-forming wire section, and consisting of a cut line section or a cut line with a connecting part that connects a part of the cut line section, and a part of the cover plate section that facilitates the mountain fold of the lock section surrounded by the two locking wire sections, on the center of the cover plate section beyond one and the other end of the drinking spout-forming wire section Other parts It is characterized by having a lower strength section for mountain folding. 【0011】 The lid for a beverage container according to the second invention is such that, in the first invention, the first support line connecting one end and the other end of the drinking spout forming line portion is the cover plate portion Other parts It is characterized by consisting of a lower-strength portion. 【0012】 The beverage container lid according to the third invention is, in the second invention, the second pivot line connecting the ends of the two locking wires inside the drinking spout forming portion is the cover plate portion Other parts It is characterized by consisting of a lower-strength portion. 【0013】 The beverage container lid according to the fourth invention is, in the third invention, the third pivot line connecting the ends of the two locking wires on the central side of the cover plate portion is, Other parts It is characterized by consisting of a lower-strength portion. 【0014】 The beverage container lid according to the fifth invention is characterized in that, in the fourth invention, the second support line is located on the peripheral edge side of the cover plate portion with respect to the first support line, and the third support line is located on the central side of the cover plate portion with respect to the low-strength portion for mountain folding. 【0015】 The beverage container lid according to the sixth invention is characterized in that, in the first invention, when the drinking spout forming portion is pushed inward, the locking portion, which is lifted in accordance with this, is folded in a mountain shape via the low-strength mountain-fold portion. 【0016】 The beverage container according to the seventh invention is characterized by comprising a container body and a lid for a beverage container according to any one of the first to sixth inventions. 【Advantages of the Invention】 【0017】 According to the present invention having the above-described configuration, without removing the straw and without removing the lid for the beverage container, when pushing in a cut or the like provided in the lid for the beverage container with a finger to form a drinkable mouth for the beverage, it is possible to prevent the finger from touching the liquid surface. Further, according to the present invention, by simplifying the opening operation itself and realizing it in one step, consumers can intuitively understand a method of forming a drinkable mouth. 【Brief Description of the Drawings】 【0018】 [Figure 1] FIG. 1 is an exploded perspective view of a beverage container according to an embodiment of the present invention. [Figure 2] FIG. 2 is a plan view of a cover plate portion. [Figure 3] FIG. 3 is an enlarged plan view showing a detailed shape of the cover plate portion shown in FIG. 2. [Figure 4] FIG. 4 is a diagram for explaining another form of the cover plate portion in a lid for a beverage container to which the present invention is applied. [Figure 5] FIG. 5 is an explanatory diagram showing step by step a method of forming a drinkable mouth in a lid for a beverage container according to an embodiment of the present invention. [Figure 6] FIG. 6 is a perspective view showing a state after pushing a portion for forming a drinkable mouth downward. [Figure 7] FIG. 7 is a side cross-sectional view showing a state after pushing a portion for forming a drinkable mouth downward. [Figure 8] FIG. 8 is a diagram for explaining a case of drinking a beverage in a beverage container while supporting a portion for forming a drinkable mouth. [Figure 9] FIG. 9 is a diagram showing another embodiment of a beverage container to which the present invention is applied. [Figure 10] FIG. 10 is a diagram showing various forms of the shape of a locking wire portion. [Figure 11]Figure 11 shows various other forms of the locking wire section. [Figure 12] Figure 12 is a diagram illustrating a method for verifying the positional relationship between one end and the other end of the low-strength section for mountain folding and the line section for forming the drinking spout. [Figure 13] Figure 13 shows the results of an experimental verification conducted to confirm the effectiveness of the beverage container lid to which the present invention is applied. [Modes for carrying out the invention] 【0019】 The embodiments illustrated below, applying the present invention, will be described with reference to the drawings. 【0020】 First, the beverage container 2 according to an embodiment of the present invention will be described using Figure 1. Figure 1 is an exploded perspective view of the beverage container 2 according to an embodiment of the present invention. 【0021】 As shown in Figure 1, the beverage container 2 according to an embodiment of the present invention is a cylindrical paper cup with a bottom, made of paper, and has an opening 3 with a rim 3a at its top, and is commonly used to hold and sell beverages 6 such as juice or coffee inside. 【0022】 Furthermore, beverage container 2 is not limited to being made of paper, but may be manufactured from other materials such as plastic. In addition, if beverage container 2 is made of plastic, environmentally friendly biodegradable plastics may be used. 【0023】 The beverage container 2 is then used for the purpose of selling the beverage 6 by closing the opening 3 with the beverage container lid 1. 【0024】 The beverage container lid 1 is made of paper and comprises a disc-shaped cover plate portion 4 that covers the opening 3 of the beverage container 2, and a side circumference portion 5 provided on the outer edge of the cover plate portion 4 that can engage with the edge portion 3a of the opening 3 of the beverage container 2 when the cover plate portion 4 covers the opening 3 of the beverage container 2. 【0025】 Furthermore, the beverage container lid 1 is not limited to being made of paper, but may be manufactured from other materials such as plastic. In addition, if the beverage container lid 1 is made of plastic, environmentally friendly biodegradable plastics may be used. 【0026】 Figure 2 is a plan view of the cover plate portion 4, and Figures 3(a) and (b) are enlarged plan views showing the detailed shape of the portion enclosed by the dashed line in Figure 2. The cover plate portion 4 is provided with a drinking spout forming line portion 11 on its peripheral edge, which consists of a cut line portion that is the shape of the peripheral edge of the drinking spout, or a low-strength portion that is weaker than the general portion of the cover plate portion. When this drinking spout forming line portion 11 is made of a low-strength portion, it is implemented by providing a low-strength portion that is weaker than the general portion of the cover plate portion 4, such as by providing perforations or reducing the thickness by half-cutting. The drinking spout forming line portion 11 includes any shape that bulges out convexly toward the peripheral edge from one end 11a and the other end 11b. 【0027】 The area enclosed by the drinking spout forming line portion 11 becomes the drinking spout forming portion 20. Two locking line portions 12 are formed from inside this drinking spout forming portion 20, extending toward the center of the cover plate portion 4 from one end 11a and the other end 11b of the drinking spout forming line portion 11. 【0028】 Figure 3(a) shows an example in which the locking wire portion 12 is constructed using a notched wire portion. This notched wire portion is constructed as a notch that penetrates the cover plate portion 4 from one end 12a to the other end 12b without any connecting portion being formed in the middle. In this case, it is assumed that one end 12a of the locking wire portion 12 is located at least inside the drinking spout forming portion 20, in other words, that the drinking spout forming wire portion 11 is located more peripherally than its one end 11a and other end 11b. It is assumed that the other end 12b of the locking wire portion 12 is located more centrally than its one end 11a and other end 11b. The locking wire portion 12 extends linearly within the drinking spout forming portion 20, or in other words, the drinking spout forming wire portion 11 extends linearly from the periphery side of its one end 11a and the other end 11b, and from the central side of the drinking spout forming wire portion 11, it extends in a manner that decreases in diameter toward the center. However, the extension form of this locking wire portion 12 is not limited to this, and it may be realized in any form. 【0029】 Figure 3(b) shows an example in which the locking wire section 12 is composed of a cut wire with connecting sections, where a portion of the cut wire section is connected. When the locking wire section 12 is composed of this cut wire with connecting sections, one or more connecting sections 13 are intermittently formed between the cuts that penetrate the cover plate section 4. It is sufficient for at least one connecting section 13 to be formed in the locking wire section 12. When in use, the consumer can use it in the same way as the cut wire section by detaching this connecting section 13. 【0030】 Hereinafter, the area enclosed by these two locking lines 12 will be referred to as the locking section 30. Within the locking section 30, a low-strength section 15 for mountain folding is provided. The low-strength section 15 for mountain folding is provided within the locking section 30, on the central side of the cover plate 4, beyond one end 11a and the other end 11b of the drinking spout forming line 11. The low-strength section 15 for mountain folding is provided within the locking section 30, on the peripheral side of the other end 12b of the locking line 12. In order to facilitate mountain folding of the locking section 30, this low-strength section 15 for mountain folding is provided by, for example, providing perforations or reducing the thickness by half-cutting, thereby providing a low-strength section with lower strength than the general part of the cover plate 4. 【0031】 It should be noted that the beverage container lid 1 to which the present invention is applied is not limited to the embodiments described above, and may further include, as shown in Figure 4, a first pivot line 21 connecting one end 11a and the other end 11b of the drinking spout forming line portion 11, a second pivot line 22 connecting the one ends 12a of the two locking line portions 12 inside the drinking spout forming portion 20, and a third pivot line 23 connecting the other ends 12b of the two locking line portions 12 on the central side of the cover plate portion 4. 【0032】 The first support line 21, the second support line 22, and the third support line 23 may all be made of low-strength parts that have lower strength than the general part of the cover plate 4. When made of such low-strength parts, processing such as providing perforations or reducing the thickness by half-cutting may be applied. However, these first support line 21, second support line 22, and third support line 23 are not mandatory, and none of them may be provided, or one or more of them may be provided. 【0033】 The first pivot line 21 extends from one end 11a to the locking wire portion 12, and also extends from the other end 11b to the locking wire portion 12. By providing such a low-strength first pivot line 21, the drinking spout forming portion 20 can be configured to rotate freely with the first pivot line 21 as a pivot point. 【0034】 Similarly, by providing a second pivot line 22 made of a low-strength portion, the drinking spout forming portion 20 and the locking portion 30 can be configured to rotate relative to each other, either folded in a mountain or valley shape, with the second pivot line 22 as the pivot point. 【0035】 Similarly, by providing a third support line 23 made of a low-strength portion, the locking portion 30 can be configured to rotate freely using the third support line 23 as a pivot point. 【0036】 Furthermore, the first to third support lines 21 to 23, and the low-strength section 15 for mountain folding are configured to be approximately parallel to each other. To define the relative positional relationship between the first to third support lines 21 to 23 and the low-strength section 15 for mountain folding, the distance between the first support line 21 and the second support line 22 is defined as Y, and the distance between the low-strength section 15 for mountain folding and the third support line 23 is defined as X. In this invention, it is desirable to set both distances X and Y to be greater than 0. 【0037】 Since the low-strength section 15 for mountain folding is assumed to be located on the central side of the cover plate section 4, beyond one end 11a and the other end 11b of the drinking spout forming line section 11 within the lock section 30, it is located on the central side of the first support line 21. 【0038】 Next, a method for forming the drinking spout of a beverage container lid according to an embodiment of the present invention will be described. Figure 5 is an explanatory diagram showing the step-by-step method for forming the drinking spout of a beverage container lid according to an embodiment of the present invention. 【0039】 First, as shown in Figure 5(a), the drinking spout forming area 20 is pressed with the fingertip F. As described above, the drinking spout forming area 20 is surrounded by a drinking spout forming line area 11 which is made of a low-strength part that is weaker than the cut line area or the general part of the cover plate area. When pressure is applied to such a drinking spout forming area 20 by the fingertip F, as shown in Figure 5(b), the drinking spout forming area 20 is pushed downward with the first pivot line 21 as the pivot point. At this time, by making the first pivot line 21 from a low-strength part, the drinking spout forming area 20 can be easily rotated downward. 【0040】 Furthermore, as the mouthpiece forming portion 20 is pushed downward, the locking portion 30 is also pushed downward in accordance with it. When the locking portion 30 is pushed downward in accordance with the mouthpiece forming portion 20, the pre-configured low-strength portion 15 for mountain folding follows and is folded into a mountain fold. During this process of folding into a mountain fold, the low-strength portion 15 for mountain folding rises up as shown in Figure 6. Note that even in a configuration without the first pivot line 21, the mouthpiece forming portion 20 can be pushed downward in the same way, and the low-strength portion 15 for mountain folding can be folded into a mountain fold based on the same mechanism. 【0041】 This low-strength section 15 for mountain folding is located towards the center with respect to the first support line 21. Therefore, the support points for the downward mountain folding of the drinking spout section 20 and the locking section 30 are different from each other. The locking section 30 is continuous with the drinking spout section 20 via the first support line 21, but they are separated from each other with the locking line section 12 as the boundary. Accordingly, as shown in Figures 5(b) and 6, the inclination angles when the drinking spout section 20 and the locking section 30 are folded downward can be freely formed to be different from each other. 【0042】 Figure 7 is a side cross-sectional view illustrating the principle by which the low-strength portion 15 for mountain folding rises up. When the low-strength portion 15 for mountain folding is not formed, and the mouthpiece forming portion 20 is pressed, the peripheral tip of the locking portion 30 (second support line 22) is pushed in, following the trajectory shown by the dotted line in the figure. 【0043】 In contrast, in the present invention, in which a low-strength portion 15 for mountain folding is formed, when the mouthpiece forming portion 20 is pressed, the peripheral tip of the locking portion 30 (second support line 22) is pushed in, drawing a trajectory as shown by the dashed line in the figure. 【0044】 The reason for this is that the first support line 21 and the support point of the low-strength section 15 for mountain folding are offset from each other. As a result of the peripheral tip of the locking section 30 (second support line 22) being pulled upward in accordance with the mountain folding of the low-strength section 15 for mountain folding, it traces the trajectory of the dashed line shown in Figure 7. 【0045】 As a result of the locking portion 30 being folded in a mountain fold via the low-strength mountain fold portion 15, the area from the third support line 23 to the low-strength mountain fold portion 15 rises towards the low-strength mountain fold portion 15, and the area from the second support line 22 to the low-strength mountain fold portion 15 rises towards the low-strength mountain fold portion 15. Consequently, the locking portion 30 is folded in a valley fold relative to the cover plate portion 4 via the third support line 23, and in a valley fold relative to the drinking spout forming portion 20 via the second support line 22. 【0046】 The drinking spout-forming portion 20, which is pushed downward in this manner, is locked by the locking portion 30. Specifically, the locking portion 30 is folded into a mountain fold via the low-strength mountain fold portion 15, and becomes continuous with the drinking spout-forming portion 20 via the second support line 22 at different angles of inclination. Even if one tries to pull up the drinking spout-forming portion 20, which is connected to the locking portion 30, from the state in which it is pushed downward, it cannot be easily achieved because the locking portion 30, which is folded into a mountain fold via the low-strength mountain fold portion 15, is stiff. Conversely, in order to pull up the drinking spout-forming portion 20 from the state in which it is pushed downward, it is not possible unless the low-strength mountain fold portion 15 in the locking portion 30 is pushed in so that the mountain fold in the low-strength mountain fold portion 15 is reversed and becomes a valley fold. In other words, the drinking spout-forming portion 20 is firmly locked by the locking portion 30, which cannot be released unless a strong external force is applied. 【0047】 Thus, a beverage container lid 1 in which the drinking spout forming portion 20 can be supported by the locking portion 30 has the following effects. 【0048】 When drinking the beverage 6 from the beverage container 2 with the drinking spout forming portion 20 locked by the locking portion 30, the beverage container 2 is tilted toward the formed drinking spout 8, as shown in Figure 8. When the beverage container 2 is tilted, the beverage 6 inside will flow toward the drinking spout 8. The arrows shown in Figure 8 indicate the direction in which the beverage 6 will flow toward the drinking spout 8. 【0049】 A portion of the flow of the beverage 6 inside the beverage container 2 toward the drinking spout 8 is obstructed by the drinking spout-forming portion 20, which is pushed downwards. As a result, a force acts on this drinking spout-forming portion 20, pushing it upwards. Since the drinking spout-forming portion 20 is locked by the locking portion 30, it can resist this upward force from the beverage 6. As a result, the beverage 6 flows toward the drinking spout 8 while circulating around the drinking spout-forming portion 20. 【0050】 In particular, when the amount of beverage 6 remaining in the beverage container 2 decreases, the beverage 6 will no longer come into contact with the base of the drinking spout forming portion 20. As a result, when the beverage container 2 is tilted, the force from the beverage 6 will cause the drinking spout forming portion 20 to detach from the locking portion 30, preventing the drinking spout forming portion 20 from being pushed back upwards. 【0051】 Thus, the beverage container 2 to which the present invention is applied can form a drinking spout that makes it easy to drink the beverage with just one step: pressing and folding the drinking spout forming portion 20 with a fingertip F. In other words, according to the present invention, the opening operation itself is simplified and realized in one step, so consumers can intuitively understand how to form the drinking spout, and therefore it has the characteristic of being easily adopted in the market. 【0052】 Furthermore, since the drinking spout forming portion 20 can be firmly locked by the locking portion 30, even if the beverage container 2 is tilted when drinking the beverage 6, the drinking spout forming portion 20 will not detach from the locking portion 30, preventing it from being pushed back upwards. Therefore, when the beverage container 2 is tilted when drinking the beverage 6, the drinking spout forming portion 20 will not return to its original position, preventing any inconvenience for the consumer. 【0053】 Furthermore, in a beverage container 2 to which the present invention is applied, it is also possible to prevent the fingertip F from touching the liquid surface when pressing and pushing in the drinking spout forming portion 20 with the fingertip F. 【0054】 Furthermore, in a beverage container 2 to which the present invention is applied, a straw can be eliminated, and a drinking spout 8 that makes it easy to drink the beverage 6 can be formed without removing the beverage container lid 1 from the beverage container 2. Moreover, in the present invention, if both the beverage container lid 1 and the beverage container 2 are made of paper, it is possible to eliminate plastic almost completely, except for the adhesives used. 【0055】 Figure 9(a) shows an example in which the drinking spout forming portion 20 is pushed further downward. In this configuration, by making the inclination angle of the drinking spout forming portion 20 sharper, the drinking spout forming portion 20 and the locking portion 30 are configured to intersect at the second pivot line 22 in a mountain fold rather than a valley fold state, as shown in the cross-sectional view of Figure 9(b). 【0056】 Similarly, in this case, even if one attempts to pull up the drinking spout forming portion 20 from a downward-pushed position, it cannot be easily achieved because the locking portion 30, which is folded via the mountain-fold low-strength portion 15, becomes rigid. In particular, as the angle of the mountain fold in the mountain-fold low-strength portion 15 becomes sharper, it is not possible to release the mountain-folded mountain-fold low-strength portion 15 unless a stronger external force is applied. For this reason, in the configuration shown in Figure 9, the locking portion 30 can be locked more securely. 【0057】 In particular, it is conceivable that a considerable number of consumers may try to push the drinking spout forming portion 20 further downwards. In such cases, too, the drinking spout can be formed and a secure lock can be achieved with just one step of movement. 【0058】 Figures 10(a) to (e) show various shapes of the locking wires 12. Figure 10(a) shows a shape in which the spacing between the locking wires 12 gradually decreases as they move towards the center. Figure 10(b) shows a shape in which the spacing between the locking wires 12 changes sequentially as they move towards the center. Figures 10(c) and (d) show a pattern in which the spacing between the locking wires 12 alternates between widening and narrowing along its entire length. Figure 10(e) shows a shape in which the spacing changes sequentially along its entire length. In addition to these examples, any other variations of shape are included in the present invention. 【0059】 Furthermore, the shape of the locking wire portion 12 includes not only regular shapes but also irregular shapes. Figures 11(a) and (b) show examples in which the locking wire portion 12 is configured asymmetrically, but these variations in shape are also included in the present invention. [Examples] 【0060】 The following describes the experimental verification conducted to confirm the effectiveness of the beverage container lid to which the present invention is applied. 【0061】 First, the positional relationship between the low-strength portion 15 for mountain folding and the line portion 11a and the other end 11b of the mouthpiece forming portion 11 was verified. In this verification, as shown in Figure 12, samples were prepared in the following directions: one in Comparative Example 1, where the low-strength portion 15 for mountain folding was positioned with the peripheral side of the reference points 11a and the other end 11b as the positive (+) direction; one in the present invention example 1, where the central side of the reference points 11a and the other end 11b as the negative (-) direction; and one in the case where the low-strength portion 15 for mountain folding was positioned on the same line as the reference points 11a and the other end 11b was defined as 0. In addition, a sample without the low-strength portion 15 for mountain folding was prepared (Comparative Example 3), and it was verified whether each sample achieved the expected effect of the present invention. In the verification, the mouthpiece forming portion 20 was pressed with a fingertip F, and it was visually confirmed whether the low-strength portion 15 for mountain folding rose as expected. 【0062】 [Table 1] 【0063】 As a result, as shown in Table 1, in Comparative Example 1, the low-strength portion 15 for valley folding dropped below the cover plate portion 4, and the locking function by the locking portion 30 could not be exhibited. In Comparative Examples 2 and 3, the low-strength portion 15 for valley folding could not be pushed upward above the cover plate portion 4. On the other hand, in Example 1 of the present invention, the low-strength portion 15 for valley folding could be pushed upward above the cover plate portion 4, and the above-described intended locking function could be exhibited. 【Example】 【0064】 Hereinafter, other experimental verifications conducted to confirm the effects of the lid for a beverage container to which the present invention is applied will be described. 【0065】 In this experimental verification, the shape of the locking wire portion 12 was verified. Regarding the intervals X and Y shown in FIG. 4, Comparative Example 4 where X = 0 and Y = 0, Comparative Example 5 where X = 0 and 0 < Y, Comparative Example 6 where 0 < X and Y = 0, and Example 2 of the present invention where 0 < X and 0 < Y were prepared, and it was verified whether the intended effects of the present invention were achieved. In the verification, the portion 20 for forming the drinking mouth was pressed with the fingertip F, and it was visually confirmed whether the low-strength portion 15 for valley folding rose as expected. 【0066】 【Table 2】 【0067】 As a result, as shown in Table 2, in Comparative Examples 4 to 6, the low-strength portion 15 for valley folding could not be pushed upward above the cover plate portion 4. On the other hand, in Example 2 of the present invention, the low-strength portion 15 for valley folding could be pushed upward above the cover plate portion 4, and the above-described intended locking function could be exhibited. 【Example】 【0068】 Hereinafter, other experimental verifications conducted to confirm the effects of the lid for a beverage container to which the present invention is applied will be described. 【0069】 In this experimental verification, as shown in Figure 13, we confirmed whether the same function is achieved when the locking wire portion 12 is constructed with a connecting portion attached to a notched wire, instead of the notched wire portion itself. For the locking wire portion 12, we fabricated three examples: Example 3 in which the connecting portion 13 is provided on the peripheral side of one end 11a and the other end 11b of the drinking spout forming wire portion 11; Example 4 in which it is provided on a portion located on the same line as one end 11a and the other end 11b; and Example 5 in which it is provided on the central side of one end 11a and the other end 11b. We then confirmed whether the expected function of the present invention was satisfied. In this confirmation, we pressed the drinking spout forming portion 20 with a fingertip F and visually confirmed whether the low-strength portion 15 for mountain folding rose as expected. 【0070】 As a result, in all of the present invention examples 3 to 5, the low-strength section 15 for mountain folding rose as expected, fulfilling the intended function. 【0071】 Furthermore, while the connecting portion 13 can be one or more on the locking wire portion 12 and still fulfill its function, fewer portions are preferable for better functionality. [Explanation of Symbols] 【0072】 1 Beverage container lid 2 Beverage containers 3 Opening 4 Cover plate part 5 Side circumference 6 Beverages 8 spout 11 Line part for forming spout 12. Locking wire section 13 Connecting part 15 Low-strength section for mountain folding 20 Part for forming mouthpiece 21. First support line 22 Second support line 23 Third support line 30 Locking part

Claims

[Claim 1] A beverage container lid comprising: a cover plate portion that covers the opening of a beverage container; and a side portion provided on the outer peripheral edge of the cover plate portion, which is capable of engaging with the edge of the opening of the beverage container when the cover plate portion covers the opening of the beverage container, A drinking spout forming line portion is provided on the peripheral edge side of the cover plate portion and is shaped like the peripheral edge side of the drinking spout, consisting of a cut line portion or a low-strength portion that is weaker than other parts of the cover plate portion, Two locking wires extend from inside the drinking spout forming area enclosed by the above-mentioned drinking spout forming wires toward the center of the cover plate portion, and consist of a cut line portion or a cut line with a connecting portion which connects a part of the cut line portion, The locking portion, surrounded by the two locking lines mentioned above, is provided with a low-strength portion for mountain folding, located closer to the center of the cover plate than one end and the other end of the drinking spout forming line, in order to facilitate mountain folding of the locking portion, which is weaker than the strength of other parts of the cover plate. A beverage container lid characterized by the following features. [Claim 2] The first support line connecting one end and the other end of the above-mentioned mouthpiece forming line consists of a low-strength portion that is weaker than other parts of the cover plate. A beverage container lid according to claim 1, characterized by the above. [Claim 3] The second support line connecting the ends of the two locking wires within the mouthpiece-forming portion is made of a low-strength portion that is weaker than other parts of the cover plate. A beverage container lid according to claim 2, characterized by the above. [Claim 4] The third support line connecting the ends of the two locking wires on the central side of the cover plate is made of a low-strength section that is weaker than other parts of the cover plate. A beverage container lid according to claim 3, characterized by the above. [Claim 5] The second support line is located on the peripheral edge side of the cover plate portion with respect to the first support line. The third support line described above is located on the central side of the cover plate portion with respect to the low-strength portion for mountain folding described above. A beverage container lid according to claim 4, characterized by the above. [Claim 6] When the drinking spout forming portion is pushed inward, the locking portion, which is lifted in response, is folded in a mountain-fold manner via the low-strength mountain-fold portion. A beverage container lid according to claim 1, characterized by the above. [Claim 7] The container comprises a container body and a lid for a beverage container as described in any one of claims 1 to 6. A beverage container characterized by the following features.

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