cap

Abstract

To provide a cap that can improve the quality of the product when dispensing the liquid contents from the container. [Solution] The cap 100 includes a lid body 1 that covers the upper end of the mouth of the container. The lid body 1 has a dispensing tube 11 and a vent tube 5 formed therein. The dispensing tube 11 opens the lid body 1 vertically and dispenses the liquid inside the container. The vent tube 5 opens the lid body 1 vertically and introduces air into the container. The lid body 1 is provided with an inclined portion 41 between the dispensing tube 11 and the vent tube 5 that slopes upward from the dispensing tube 11 side toward the vent tube 5 side.

Description

Technical Field

[0001] The present invention relates to a cap used for a container.

Background Art

[0002] The cap includes a lid body attached to the mouth of the container and an upper lid that can be opened and closed with respect to the lid body. The lid body has a pouring cylinder in which a pouring outlet is formed. From the pouring outlet, the content liquid (for example, drinking water, liquid seasoning, etc.) stored in the container is poured out to the outside. As such a cap and a container using the cap, for example, inventions as described in Patent Documents 1 and 2 have been proposed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] The container cap described in Patent Document 1 is provided with an air inlet and a liquid pouring cylinder in the lid body, and the internal pressure in the container is kept constant by introducing air from the air inlet. Then, when the container is tilted, the content liquid is poured out by its own weight. However, in the container described in Patent Document 1, if the container is tilted too much, the content liquid may be poured out excessively, and the content liquid may not be poured out in an appropriate amount. Further, in the container described in Patent Document 1, for example, when the content liquid moves vigorously in the container, the content liquid may reach the air inlet and may be inadvertently discharged to the outside from the air inlet.

[0005] The container described in Patent Document 2 introduces the contents into a measuring member located outside the container body by elastically deforming the container body and increasing the internal pressure of the container body. The container described in Patent Document 2 then stops deforming the container when the amount of contents in the measuring member reaches the desired amount, and the contents are dispensed from the measuring member to the outside. However, the container described in Patent Document 2 may have difficulty introducing the appropriate amount of contents into the measuring member and dispensing it to the outside due to the influence of the rigidity of the container. Failure to dispense the appropriate amount of contents or unintended discharge of contents to the outside may reduce the quality of the product when dispensing contents from the container.

[0006] This invention has been made in view of the above problems, and aims to provide a cap that can improve the quality of a product when dispensing liquid contents from a container. [Means for solving the problem]

[0007] According to one aspect of the present invention, the cap is a cap that is attached to a container, comprising a lid body that covers the upper end of the mouth of the container, The lid itself has, The lid body has openings at the top and bottom, and a dispensing cylinder for pouring out the liquid inside the container, The lid body has openings at the top and bottom, and a vent pipe that introduces air into the container. A structure has been formed, The lid body is provided with an inclined section between the dispensing cylinder and the vent cylinder, which slopes upward from the dispensing cylinder side toward the vent cylinder side.

[0008] According to this, when the container is tilted with the dispensing nozzle facing downwards and the vent nozzle facing upwards, a portion of the liquid contents of the container is directed toward the inclined section and then guided upwards along the inclined section. In other words, by tilting the container, the flow of the liquid contents inside the container is divided into a first flow, which is the flow of liquid contents into the dispensing nozzle, and a second flow, which is guided upwards toward the dispensing nozzle and leaves the dispensing nozzle. This limits the flow rate of liquid contents toward the dispensing nozzle, preventing excessive dispensing of the liquid contents through the dispensing nozzle. Therefore, the appropriate amount of liquid contents can be dispensed.

[0009] In the cap according to the present invention, it is preferable that the lid body is further provided with a flat portion that extends radially from the upper edge of the inclined portion toward the ventilation pipe.

[0010] According to this, a space is formed below the inclined and flat sections between the dispensing cylinder and the vent cylinder. Therefore, the second flow tends to flow into this space and accumulate before reaching the vent cylinder. As a result, the second flow is less likely to reach the vent cylinder, thereby suppressing the discharge of the liquid contents through the vent cylinder to the outside.

[0011] The cap according to the present invention has an inclined portion that is connected to the lower end of the dispensing cylinder, The flat portion is preferably formed and connected to the upper part of the ventilation pipe.

[0012] According to this, a portion of the vent pipe is formed extending downward from the flat section. Therefore, after the second flow flows into the space and reaches the flat section, the outer surface of the vent pipe extending downward from the flat section becomes an obstacle, making it difficult for it to reach the lower end of the vent pipe. As a result, the second flow has difficulty entering the vent pipe from the lower end, thereby suppressing the discharge of the contents to the outside through the vent pipe.

[0013] In the cap according to the present invention, it is preferable that a first baffle plate is provided inside the vent pipe, which protrudes inward from the inner surface on the dispensing pipe side, thereby reducing the opening area inside the vent pipe.

[0014] According to this, the first baffle plate extends inward from the dispensing cylinder side inside the vent pipe. Therefore, when the container is tilted significantly with the dispensing cylinder facing downwards and the vent pipe facing upwards, the liquid contents that enter the vent pipe from the lower end are blocked by the first baffle plate, thereby preventing the liquid contents from being discharged to the outside through the vent pipe.

[0015] The cap according to the present invention is provided with a second baffle plate inside the vent pipe that protrudes inward from the inner surface opposite to the dispensing pipe, thereby reducing the opening area inside the vent pipe. It is preferable that the first baffle plate reduces the opening area inside the vent pipe more than the second baffle plate and is positioned above the second baffle plate.

[0016] According to this design, the first baffle plate is relatively larger than the second baffle plate. As a result, when the container is tilted significantly with the dispensing nozzle facing downwards and the vent nozzle facing upwards, the liquid contents are effectively blocked by the first baffle plate, effectively suppressing discharge to the outside. Furthermore, the first and second baffle plates form a meandering channel within the vent nozzle that meanders radially along the lid body between the dispensing nozzle side and the vent nozzle side. Thus, outside air is introduced into the container through this meandering channel. At this time, since the first and second baffle plates protrude inward from opposite sides on the inner surface of the vent nozzle, the cap can be configured to be almost completely closed when viewed from below, with the first and second baffle plates acting as the first and second baffle plates. This prevents the liquid contents from being discharged to the outside through the vent nozzle, even if, for example, liquid splashes up from below.

[0017] In the cap according to the present invention, it is preferable that the first baffle plate and the second baffle plate are provided so as to protrude downward from the inner surface of the dispensing cylinder.

[0018] According to this, when the container is tilted with the dispensing nozzle facing downwards and the vent nozzle facing upwards, air is efficiently introduced from the outside through the vent, and the discharge of the liquid contents from the vent is effectively suppressed.

[0019] In the cap according to the present invention, it is preferable that the lower end of the vent pipe is positioned above the lower end of the dispensing pipe.

[0020] According to this, the lower end of the vent pipe is further away from the liquid surface than the lower end of the dispensing pipe, so that when the container is tilted with the dispensing pipe facing downwards and the vent pipe facing upwards, the liquid inside the vent pipe is prevented from being discharged to the outside.

[0021] In the cap according to the present invention, it is preferable that the pouring cylinder and the ventilation cylinder are provided at both ends in the radial direction of the lid body.

[0022] According to this, when the distance between the pouring cylinder and the ventilation cylinder becomes large, and the container is tilted with the pouring cylinder downward and the ventilation cylinder upward, the distance between the lower end of the ventilation cylinder and the liquid surface of the content liquid becomes large. Thereby, it is possible to suppress the content liquid from being discharged to the outside through the ventilation cylinder.

[0023] In the cap according to the present invention, it is preferable that the opening area of the ventilation cylinder is smaller than the opening area of the pouring cylinder.

[0024] According to this, since it is difficult for the content liquid to enter the ventilation cylinder rather than the pouring cylinder, it becomes difficult for the content liquid to be discharged to the outside through the ventilation cylinder rather than the pouring cylinder. Therefore, it is possible to suppress the content liquid from being discharged to the outside through the ventilation cylinder.

Effect of the Invention

[0025] According to the present invention, it is possible to improve the quality as a product for pouring the content liquid from the container.

Brief Description of the Drawings

[0026] [Figure 1] It is a vertical cross-sectional perspective view of the cap according to Embodiment 1 of the present invention and a container to which the cap is attached. [Figure 2] It is a vertical cross-sectional upper perspective view of the main part of the lid body of the cap. [Figure 3] It is a vertical cross-sectional lower perspective view of the main part of the lid body. [Figure 4A] It is a vertical cross-sectional view of the main part of the lid body. [Figure 4B] It is an enlarged vertical cross-sectional view of the portion surrounded by the dotted line in FIG. 4A. [Figure 5] It is a bottom view of the main part of the lid body. [Figure 6] It is a vertical cross-sectional view of the container provided with the cap in a tilted state. [Figure 7] It is a vertical cross-sectional view of the container in a further tilted state. [Figure 8] This is a vertical cross-sectional view of the same container in a further tilted position. [Figure 9] This is a vertical cross-sectional view of the same container in a further tilted position. [Figure 10] This is a vertical cross-sectional view of the container after it has been returned to a horizontal position. [Figure 11] This is a vertical cross-sectional view of the container after it has been returned to a horizontal position. [Figure 12A] This is a longitudinal cross-sectional view showing the vent tube of the cap according to Embodiment 2 of the present invention. [Figure 12B] This is a view of the bottom of the vent cylinder. [Figure 13A] This is a longitudinal cross-sectional view showing the vent tube of the cap according to Embodiment 3 of the present invention. [Figure 13B] This is a view of the bottom of the vent cylinder. [Modes for carrying out the invention]

[0027] Hereinafter, a cap 100 according to an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts will be denoted by the same reference numerals to avoid repetition in the description. In the following description, terms such as "top," "bottom," "side," and "vertical" may be used to indicate position or direction. These terms are used for convenience to facilitate understanding of the embodiment and are not limited to the position or direction in actual implementation.

[0028] <Embodiment 1> [Regarding the composition of Cap 100] First, with reference to Figure 1, the configuration of the cap 100 and the container B to which the cap 100 is attached according to Embodiment 1 of the present invention will be described.

[0029] As shown in Figure 1, the cap 100 is attached to the mouth m of container B. Container B contains the liquid contents L. The cap 100 comprises a lid body 1 that covers the upper end of the mouth m of container B, an upper lid 2 that can be opened and closed relative to the lid body 1, and a hinge 3 that connects the lid body 1 and the upper lid 2.

[0030] The lid body 1 is provided with a dispensing tube 11 and a vent tube 5 that open to the top and bottom of the lid body 1. The dispensing tube 11 dispenses the liquid contents L inside container B to the outside of container B through a dispensing port 10 formed inside. The vent tube 5 introduces air from outside container B to the inside of container B through a vent 50 formed inside.

[0031] The lid body 1 has an outer cylindrical portion 17 extending downward from the outer circumference of the lid body 1, and an inner cylindrical portion 16 formed inside the outer cylindrical portion 17. The upper ends of the outer cylindrical portion 17 and the inner cylindrical portion 16 are connected by an upper wall portion 15. A circumferential space S1 is formed by the lower surface of the upper wall portion 15, the inner surface of the outer cylindrical portion 17, and the outer surface of the inner cylindrical portion 16. The mouth portion m of the container B is inserted into the circumferential space S1 and is held between the inner cylindrical portion 16 and the outer cylindrical portion 17. In this way, the cap 100 is attached to the container B. The lid body 1 has a projection portion 19 that protrudes upward from the outer circumference of the lid body 1. An engaging portion 19b that protrudes outward is formed on the outer surface of the projection portion 19.

[0032] The top lid 2, shown by dashed lines, has a fitting cylinder 22 that fits with the inner surface of the spout 10 when the top lid 2 is closed relative to the lid body 1 (hereinafter referred to as the "closed state"), and an outer fitting cylinder 23 and an inner fitting cylinder 24 that fit with the outer and inner surfaces of the vent 50, respectively, when the top lid 2 is closed. The upper ends of the fitting cylinders 22, 23, and 24 in the closed state are connected to the top plate 21 of the top lid 2. A cylindrical skirt portion 25 extends upward from the outer circumference of the top plate 21 when the top lid 2 is open relative to the lid body 1 (hereinafter referred to as the "open state"), as shown by solid lines.

[0033] The hinge 3 partially connects the upper end of the skirt portion 25 in the open state to the upper end of the outer cylinder portion 17 of the lid body 1. A flange portion 26 is provided on the opposite side of the hinge 3 at the upper end of the skirt portion 25 in the open state. The flange portion 26 protrudes outward from the skirt portion 25, allowing the user's fingers to grip it and apply force when opening and closing the top lid 2. An engaging portion 25b that protrudes inward is formed on the inner periphery of the upper end of the skirt portion 25 in the open state. The engaging portion 25b engages with the engaged portion 19b of the lid body 1 in the vertical direction in the closed state, thereby maintaining the closed state. In this embodiment, the lid body 1 and the top lid 2 are connected by the hinge 3, but the lid body 1 and the top lid 2 may be configured as separate parts.

[0034] With the above configuration, when the cap 100 is closed, the engaging portion 25b of the upper lid 2 engages with the engaged portion 19b of the lid body 1, and the fitting cylinder 22, outer fitting cylinder 23, and inner fitting cylinder 24 of the upper lid 2 fit with the inner surface of the spout 10 of the lid body 1, the outer surface of the vent cylinder 5, and the inner surface of the vent cylinder 5, respectively. As a result, the liquid contents L are contained within the container B in a state where they cannot be poured out. On the other hand, when the cap 100 is open, the above engagements and fittings are released, allowing the contents of the container B to be poured out from the spout 10. At this time, because of the presence of the vent cylinder 5, air can be introduced into the container B from the vent cylinder 5 while the liquid contents L is being poured out, so that the internal pressure inside the container B can be kept constant. As a result, the liquid contents L can be poured out stably.

[0035] [Regarding the composition of the lid body 1] Next, the structure of the lid body 1 will be further explained with reference to Figures 2 to 5. In Figures 2 and beyond, only the internal structure of the lid body 1, beyond the inner cylinder 16, is shown as the essential part. As shown in Figures 2 to 5, the lid body 1 has a lid plate portion 4 between the dispensing cylinder 11 and the ventilation cylinder 5. The lid plate portion 4 is provided with an inclined portion 41, an upper flat portion 42 (an example of a flat portion), and a lower flat portion 43.

[0036] Below the inclined portion 41, an inclined surface 41b is formed that slopes upward from the dispensing cylinder 11 side toward the ventilation cylinder 5 side. Below the upper flat portion 42, an upper flat surface 42b is formed that extends radially (hereinafter referred to as "lateral direction") from the upper edge of the inclined surface 41b toward the ventilation cylinder 5. Below the lower flat portion 43, a lower flat surface 43b is formed that extends laterally from the lower edge of the inclined surface 41b toward the lower end 11b of the dispensing cylinder 11. In other words, the inclined surface 41b of the inclined portion 41 is formed in connection with the lower end 11b of the dispensing cylinder 11.

[0037] In particular, as shown in Figure 5, a side wall portion 44 is provided inside the inner cylinder portion 16, extending from the outer surface of the dispensing cylinder 11 in both circumferential directions of the lid body 1. The outer surface of the side wall portion 44 faces the inner surface of the inner cylinder portion 16. The lower end of the side wall portion 44 is connected to the outer peripheral end of the lower flat portion 43. Both ends of the side wall portion 44 in the circumferential direction are connected to both ends of the inclined portion 41 in the lateral direction. The upper end of the side wall portion 44 is connected to the upper wall portion 15. As a result, a recessed space S2 is formed above the lid plate portion 4 in the lid body 1, surrounded by the side wall portion 44, the lower flat portion 43, and the inclined portion 41, which is recessed downwards. On the opposite side of the recessed space S2, which is sandwiched between the lid plate portion 4, a protruding space S3 (an example of a space) is formed in the lid body 1, surrounded by the inclined portion 41, the upper flat portion 42, and the inner cylinder portion 16, which is projecting upwards. The protruding space S3 is configured to have a larger volume than if it were composed only of the inclined portion 41 and the inner cylindrical portion 16, due to the provision of the upper flat portion 42.

[0038] The upper flat portion 42 is formed by being connected to the upper outer surface of the ventilation cylinder 5. Hereinafter, the portion of the ventilation cylinder 5 below the upper flat portion 42 may be referred to as the lower ventilation cylinder 52.

[0039] A first baffle plate 56 and a second baffle plate 57 are provided inside the ventilation pipe 5. The first baffle plate 56 and the second baffle plate 57 are provided so as to protrude inward and downward from the inner surface on the dispensing pipe 11 side. The first baffle plate 56 and the second baffle plate 57 protrude inward from opposite inner surfaces inside the dispensing pipe 11, thereby reducing the lateral opening area inside the ventilation pipe 5.

[0040] Specifically, as shown in Figure 4B, in this embodiment, the first baffle plate 56 protrudes laterally inward from the inner surface of the dispensing cylinder 11 by a length L1, and the second baffle plate 57 protrudes by a length L2. The sum of L1 and L2 is configured to be the same as or approximately the same as the inner diameter D of the dispensing cylinder 11. As a result, the first baffle plate 56 and the second baffle plate 57 are configured to almost completely close the inside of the ventilation cylinder 5 when viewed from below, as shown in the bottom view of Figure 5. The first baffle plate 56 and the second baffle plate 57 are configured such that L1 is greater than L2. That is, the first baffle plate 56 is configured to be relatively larger than the second baffle plate 57.

[0041] The first baffle plate 56 is positioned above the second baffle plate 57. As a result, the first baffle plate 56 and the second baffle plate 57 form a meandering flow path P (see Figure 4A) that meanders laterally between the dispensing pipe 11 side and the vent pipe 5 side within the vent pipe 5. Thus, the cap 100 almost completely closes the inside of the vent pipe 5 when viewed from below, while allowing outside air to be introduced into the container B through the meandering flow path P.

[0042] As shown in Figure 4A, the cap 100 may be configured such that the lower end 52b of the vent pipe 5 is positioned, for example, Δ1, above the lower end 11b of the dispensing pipe 11. This causes the lower end 52b of the vent pipe 5 to be further away from the liquid surface of the contents L than the lower end 11b of the dispensing pipe 11. Therefore, when the container B is tilted with the dispensing pipe 11 facing downwards and the vent pipe 5 facing upwards, the discharge of the contents L from the vent 50 is suppressed.

[0043] Furthermore, as shown in Figure 4A, the upper end of the vent pipe 5 may be configured to be, for example, Δ2 above the upper end of the dispensing pipe 11. This causes the upper end of the vent pipe 5 to be further away from the liquid surface of the contents L than the upper end of the dispensing pipe 11. Therefore, it becomes more difficult for the contents L to be discharged from the vent 50 than from the dispensing outlet 10, thus suppressing the discharge of the contents L from the vent 50. In this embodiment, an enlarged diameter section 11c is provided at the top of the dispensing pipe 11, where the diameter of the dispensing outlet 10 widens towards the top, in order to prevent dripping of the contents L during dispensing. In this embodiment, the "upper end of the dispensing pipe 11" refers to the upper end of the dispensing outlet 10 where the entire circumference does not overlap with the enlarged diameter section 11c.

[0044] Furthermore, the cap 100 may be configured such that the opening area of ​​the vent pipe 5, excluding the first baffle plate 56 and the second baffle plate 57, is smaller than the opening area of ​​the dispensing pipe 11. This makes it more difficult for the liquid contents L to enter the vent 50 than the dispensing outlet 10, thereby suppressing the discharge of the liquid contents L from the vent 50.

[0045] Furthermore, the dispensing tube 11 and the vent tube 5 may be configured to be provided at both ends of the lid body 1 in the lateral direction. This increases the distance CD (see Figure 4A) between the dispensing tube 11 and the vent tube 5. Therefore, when the container B is tilted with the dispensing tube 11 at the bottom and the vent tube 5 at the top, the distance between the lower end 52b of the vent tube 5 and the liquid surface of the contents L increases, thereby suppressing the discharge of the contents L from the vent port 50.

[0046] Furthermore, the cap 100 may be configured to have a plurality of flaps 14 at the bottom of the spout 10. The flaps 14 are pieces (for example, six in this embodiment) provided circumferentially on the inner surface of the bottom of the spout 10, and each piece extends inward and upward from the lower edge of the inner surface of the spout 10 into the dispensing cylinder 11. In particular, as shown in Figure 5, the opening area of ​​the spout 10 is narrowed by the flaps 14. As a result, when the container B is tilted, the flow rate of the liquid contents L introduced into the dispensing cylinder 11 is restricted, making it possible to dispense an appropriate amount of the liquid contents L.

[0047] [Regarding the movement of the liquid contents (L) inside cap 100] Next, with reference to Figures 6 to 11, the movement of the liquid contents L inside the cap 100 described above will be explained. As shown in Figure 6, when the container B is tilted with the dispensing tube 11 facing downwards and the vent tube 5 facing upwards, a portion of the liquid contents L inside the container B flows into the dispensing tube 11 (i.e., the spout 10) as a first flow F1.

[0048] As shown in Figure 7, when the container B is tilted with the dispensing cylinder 11 facing downwards and the vent cylinder 5 facing upwards, a portion of the liquid contents L in the container B passes the lower end 11b of the dispensing cylinder 11 and is guided upwards along the inclined surface 41b of the inclined section 41 as a second flow F2. In other words, by tilting the container B, the flow of the liquid contents L inside the container B is divided into a first flow F1 that flows into the dispensing port 10 and a second flow F2 that is guided upwards from the dispensing cylinder 11 and moves away from the dispensing cylinder 11. This limits the flow rate of the liquid contents L toward the dispensing port 10, thereby suppressing excessive dispensing of the liquid contents L from the dispensing port 10. Therefore, the liquid contents L are dispensed in an appropriate amount from the dispensing port 10 while maintaining a laminar flow state without becoming turbulent.

[0049] As shown in Figure 8, when container B is tilted further, the second flow F2 enters the protruding space S3 and reaches the upper flat surface 42b. At this time, because the upper flat portion 42 is provided and the volume of the protruding space S3 is large, the second flow F2 tends to flow into the protruding space S3 and remain there before reaching the lower end 52b of the lower vent cylinder 52. As a result, the second flow F2 has difficulty reaching the vent port 50, and the discharge of the contents L from the vent port 50 is suppressed.

[0050] Furthermore, as shown in Figure 8, the second flow F2 flows into the protruding space S3 and reaches the upper flat surface 42b, as the lower vent 52 is formed by extending downward from the upper flat portion 42. From the upper flat surface 42b, it is guided downward or to the side of the lower vent 52 along the outer surface of the lower vent 52 (indicated by the symbol F3). In other words, the outer surface of the lower vent 52 obstructs the second flow F2, making it difficult for it to reach the vent 50. This suppresses the discharge of the liquid contents L from the vent 50.

[0051] Subsequently, when the protruding space S3 is filled with the liquid contents L, a third flow F4 is generated in which the liquid contents L flows into the vent opening 50. At this time, since the first baffle plate 56 extends from the dispensing cylinder 11 side inside the vent cylinder 5, the liquid contents L of the third flow F4 that enters the vent opening 50 is blocked by the first baffle plate 56, thereby suppressing the discharge of the liquid contents L from the vent opening 50. Furthermore, since the first baffle plate 56 is relatively larger than the second baffle plate 57, the discharge of the liquid contents L from the vent opening 50 is effectively suppressed.

[0052] As shown in Figure 9, if container B is tilted further, the third flow F4 introduced into the vent 50 will increase. At this time, the amount of liquid L discharged from the spout 10 due to the weight of the liquid L will increase, and the airflow F5 introduced into container B from the vent 50 will also increase. Therefore, even in the case shown in Figure 9, the airflow F5 acts as an obstacle, suppressing the discharge of liquid L from the vent 50.

[0053] Once dispensing is complete and the container B is returned to its original position as shown in Figure 10 (arrow D1), the liquid contents L fall downwards within the container B due to its own weight. At this time, as shown in the figure, a fourth flow F6 may be created from the fallen liquid contents L, bouncing off the liquid surface LS and flowing upwards. In this case, the cap 100 is configured such that the vent 50 is almost completely closed when viewed from below by the first baffle plate 56 and the second baffle plate 57, so that even when the fourth flow F6 is present, the discharge of the liquid contents L from the vent 50 is suppressed. Furthermore, the first baffle plate 56 and the second baffle plate 57 do not overlap laterally, which helps to maintain good mold release properties during molding.

[0054] Also, when the tilt of container B is returned to its original position (arrow D1), a liquid film LF may form on the lower end 52b of the vent pipe 5, as shown in Figure 11. At this time, the liquid film LF may rise inside the vent opening 50 (arrow D2) due to the influence of pressure and volume changes inside container B, and ultimately the contents L may be discharged to the outside. In contrast, the cap 100 has the tips of the first baffle plate 56 and the second baffle plate 57 pointing downwards, so the tip of the first baffle plate 56 or the second baffle plate 57 comes into contact with the liquid film LF that has risen inside the vent pipe 5 (arrow D3 or arrow D4), and the liquid film LF is broken. In other words, the first baffle plate 56 or the second baffle plate 57 acts as an obstacle, suppressing the rise of the liquid film LF above the first baffle plate 56 or the second baffle plate 57, and thus suppressing the discharge of the contents L from the vent opening 50.

[0055] The height difference L3 (see Figure 4B) between the first baffle plate 56 and the second baffle plate 57 is preferably set to about 2 mm to 4 mm, and more preferably to 3.5 mm. When L3 is within this range, air is efficiently introduced from the outside through the vent 50, and the discharge of the liquid contents L from the vent 50 is effectively suppressed.

[0056] Furthermore, the first baffle plate 56 and the second baffle plate 57 are configured to be inclined downward by a predetermined angle θ (see Figure 4B) from the inner surface of the vent cylinder 5 in the lateral direction, as seen in the vertical cross-sectional view in Figure 4B. The angle θ is preferably set to about 30° to 50°, and more preferably to 45°. When θ is within this range, air is efficiently introduced from the outside through the vent 50, and the discharge of the liquid contents L from the vent 50 is effectively suppressed.

[0057] <Embodiment 2, Embodiment 3> In Embodiment 1, the ventilation pipe 5 of the cap 100 is formed with a first baffle plate 56 and a second baffle plate 57 extending inward and downward from the inner surface of the ventilation pipe 5. However, as shown in Figures 12A and 12B, in Embodiment 2, the ventilation pipe 205 of the cap 200 may be formed with a first baffle plate 256 and / or a second baffle plate 257 extending only inward from the ventilation pipe 205. Also, as shown in Figures 13A and 13B, in Embodiment 3, the ventilation pipe 305 of the cap 300 may be configured such that flaps 58 are placed inside the ventilation pipe 305 instead of the first baffle plate 56 and the second baffle plate 57. In Embodiment 3, for example, four flaps 58 are provided at the top inside the ventilation pipe 305. While Embodiments 2 and 3 are less effective than Embodiment 1, particularly in suppressing the discharge of the liquid contents L from the vent 50, their simpler configuration makes it easier to introduce air from the outside, and they offer advantages in terms of manufacturing and cost.

[0058] Embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention. The drawings schematically show each component in order to facilitate understanding, and the thickness, length, number, spacing, etc. of each component shown may differ from the actual dimensions due to the convenience of drawing creation. Furthermore, the material, shape, dimensions, etc. of each component shown in the above embodiments are examples and are not particularly limited, and various modifications are possible without substantially departing from the configuration of the present invention. [Explanation of symbols]

[0059] B container m Mouth L Content liquid S3 protruding space F1 First Stream F3 2nd flow 1 Lid body 2 Top lid 3 Hinge 4 Lid plate part 5 vents 10 spout 11 Pour tube 41 Slope 42 Upper flat part 43 Lower flat part 44 Side wall section 50 Ventilation holes 51 Upper vent 52 bottom-vented cylinders 56 First Obstacle Board 57 Second Obstacle Board

Claims

1. A cap that can be attached to a container, comprising a lid body that covers the upper end of the mouth of the container, The lid itself has, The lid body has openings at the top and bottom, and a dispensing cylinder for pouring out the liquid inside the container, The lid body has openings at the top and bottom, and a vent pipe that introduces air into the container. A structure has been formed, The cap is characterized by having an inclined section between the dispensing tube and the vent tube, which slopes upward from the dispensing tube side toward the vent tube side.

2. The cap according to claim 1, wherein the lid body is further provided with a flat portion that extends radially from the upper edge of the inclined portion toward the ventilation pipe.

3. The inclined portion is formed and connected to the lower end of the dispensing cylinder, The flat section is formed by connecting it to the upper part of the ventilation pipe. The cap according to claim 2, characterized in that it is a cap.

4. A first baffle plate is provided inside the vent pipe, which protrudes inward from the inner surface on the dispensing pipe side, thereby reducing the opening area inside the vent pipe. The cap according to claim 1, characterized in that it is the cap described in claim 1.

5. A second baffle plate is provided inside the vent pipe, which protrudes inward from the inner surface opposite the dispensing pipe, thereby reducing the opening area inside the vent pipe. The first baffle plate reduces the opening area inside the vent pipe more than the second baffle plate, and is also positioned above the second baffle plate. The cap according to claim 4, characterized in that it is a cap.

6. The first baffle plate and the second baffle plate are provided so as to protrude downward from the inner surface of the dispensing cylinder. The cap according to claim 5, characterized in that it is a cap according to claim 5.

7. The lower end of the vent pipe is positioned above the lower end of the dispensing pipe. A cap according to any one of claims 1 to 6, characterized in that

8. The dispensing tube and the ventilation tube are located at both ends of the lid body in the radial direction. A cap according to any one of claims 1 to 6, characterized in that

9. The opening area of ​​the vent pipe is smaller than the opening area of ​​the dispensing pipe. A cap according to any one of claims 1 to 6, characterized in that

Images