JP7748868B2 - Cap unit and beverage container - Google Patents

Description

The present invention relates to a cap unit and a beverage container.

Conventionally, cap units that can be detachably attached to a container body with an open top are known, for example, from Patent Documents 1 and 2.

The cap unit described in Patent Document 1 has a spout-forming member that forms a drinking or pouring spout and is removably attached to the opening of the cap body. A spout-removal mechanism is provided between the cap body and the spout-forming member for removably attaching the spout-forming member to the opening of the cap body. A waterproof gasket is also removably attached to the lower flange of the spout-forming member. The waterproof gasket is a ring-shaped sealing member that creates a tight seal between the spout-forming member and a stepped portion (protruding portion) that protrudes around the entire circumference inside the neck of the container body.

The stopper described in Patent Document 2 comprises a stopper main body that is detachably threaded onto the opening of the container main body; a first lid that is openably and closably attached to the stopper main body by a hinge mechanism and closes the drinking spout (opening) of the container main body when closed; a first sealant that is attached to the first lid and seals the gap between the opening of the container main body and the first lid when the first lid is closed; a second lid that is openably and closably attached to the stopper main body using the hinge mechanism and covers the first lid from the outside when the second lid is closed; a second sealant that is attached to the second lid and closes a hole in the first lid when the second lid is closed; and a locking member that is attached to the stopper main body and engages with the second lid or the first lid to keep the stopper in a closed state. The locking member is located radially opposite the hinge mechanism (i.e., at the front of the stopper).

Patent No. 6554356 Patent No. 6346785

The cap unit of Patent Document 1 can be disassembled and cleaned, but it has a large number of parts, many of which need to be washed. In addition, the assembly and disassembly work is time-consuming, and there is a risk of disassembling and losing parts.
In addition, the liquid passage hole of the spout-forming member is narrow, making it difficult to see inside the container body with the cap unit attached, making it difficult for users to tell when the beverage is coming out of the liquid passage hole when drinking.Furthermore, when refilling the container body with beverage, it is necessary to remove the cap unit, which is time-consuming.

The stopper in Patent Document 2 has a drinking spout near the left and right ends of the opening of the container body. However, in commonly used beverage containers with cap units, the drinking spout is often located in the same front portion as the locking portion (lid locking mechanism), meaning that the beverage is drunk from the front of the container. Therefore, drinking from the left or right side of the opening of the container body as in Patent Document 2 may be unfamiliar to the user.
In addition, because the container body is made of metal, the user may feel uncomfortable when placing their mouth on the opening (drinking spout) of the container body. Also, because the heat of hot beverages is easily transferred to the drinking spout, it may be difficult for the user to place their mouth on the drinking spout.

One of the objectives of the present invention is to provide a cap unit and beverage container that reduces the loss of parts, makes it easy to refill the beverage through the liquid passage and visually check when the beverage is coming out, provides a pleasant mouthfeel when the user places the spout on their mouth, and makes it easy to place the spout on their mouth even when the beverage is hot, making it easy to use and drink the beverage.

One aspect of the present invention is a cap unit that can be removably attached to a container body that has an open top, and includes: a cap body that is attached to the top opening of the container body and has a liquid passage that connects the inside and outside of the container body; a lid body that covers the liquid passage from above; a hinge that rotatably connects the lid body to the cap body; a water-tight gasket that directly seals the space between the lid body and the container body; and a lid locking mechanism that fixes the lid body in a closed position relative to the cap body, wherein the lid locking mechanism has a locking portion that locks with the lid body or the cap body, the hinge is located at the rear of the cap unit, and the locking portion is located at the front of the cap unit, the cap body has approximately the same diameter as the top opening and is located directly above the top opening, and has a drinking spout with the liquid passage formed therein, the drinking spout extends in the vertical direction to connect with the top opening, and the front of the drinking spout protrudes above the locking portion.

In the above cap unit, it is preferable that the lid body has a plug portion that is inserted into the upper opening through the inside of the drinking spout, and the waterproof gasket seals the gap between the plug portion and a protruding portion that protrudes from the inside of the container body.

The cap unit preferably includes an opening gasket that seals the gap between the cap body and the upper opening.

In the above cap unit, it is preferable that the lid body has a pressure release mechanism, which includes an air vent that penetrates the bottom wall of the stopper portion in the vertical direction and a valve gasket that blocks the air vent so that it can be opened and closed freely, and which is capable of blocking the communication of the air vent and releasing the blockage to open the air vent and release the pressure in the container body.
In the cap unit, the protruding portion is preferably provided below the upper opening.
Another aspect of the present invention is a cap unit that can be detachably attached to a container body that is open at the top, comprising: a cap body that is attached to the top opening of the container body and has a liquid passage port that connects the inside and outside of the container body; a lid body that covers the liquid passage port from above; a hinge that rotatably connects the lid body to the cap body; a waterproof gasket that directly seals the gap between the lid body and the container body; a lid lock mechanism that fixes the lid body in a closed position relative to the cap body; and an opening gasket that seals the gap between the cap body and the top opening, wherein the lid lock mechanism is attached to the lid body or the cap body. The cap body has a locking portion that locks with the cap body, the hinge is arranged at the rear of the cap unit, the locking portion is arranged at the front of the cap unit, the cap body has a drinking spout portion that has approximately the same diameter as the upper opening and is arranged directly above the upper opening, and has the liquid passage formed therein, the drinking spout portion extends in the vertical direction to be connected to the upper opening, the front portion of the drinking spout portion protrudes above the locking portion, the lid body has a stopper portion that is inserted into the upper opening through the inside of the drinking spout portion, and the watertight gasket seals the space between the stopper portion and a protrusion that protrudes from the inside of the container body.
Furthermore, one aspect of the beverage container of the present invention comprises the cap unit described above and the container body to which the cap unit is attached.

The cap unit and beverage container of one embodiment of the present invention can reduce the loss of parts, make it easier to refill the beverage through the fluid passage and visually check when the beverage is coming out, provide a pleasant mouthfeel when the user places their mouth on the drinking spout, and make it easy to place the spout on the mouth even when the beverage is hot, making it comfortable to use and easy to drink the beverage.

FIG. 1 is a perspective view showing a beverage container according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing a beverage container. FIG. 3 is a cross-sectional view of a portion of the beverage container, showing the lid in a closed state (closed position). FIG. 4 is a cross-sectional view of a portion of a beverage container, showing the lid in an intermediate position as it transitions between a closed and an open position. FIG. 5 is a cross-sectional view of a portion of the beverage container, showing the lid in an open state (open position). FIG. 6 is a perspective view showing a beverage container. FIG. 7 is a perspective view of a beverage container, showing the interior of the container body visible through the liquid passage. FIG. 8 is a cross-sectional view showing a part of a beverage container, illustrating a state in which the inside and outside of the container body are connected by the pressure release mechanism (i.e., a state in which the pressure inside the container body is released). FIG. 9 is a cross-sectional view showing a part of a beverage container, illustrating a modified example of the opening packing. FIG. 10 is a perspective view showing a beverage container according to a second embodiment of the present invention. FIG. 11 is a cross-sectional view of a portion of the beverage container, showing the lid in a closed state (closed position). FIG. 12 is a cross-sectional view showing a part of a beverage container, illustrating a state in which the inside and outside of the container body are connected by the pressure release mechanism (i.e., a state in which the pressure inside the container body is released). FIG. 13 is a cross-sectional view showing a portion of the beverage container, illustrating a state in which the lid body is released from the locking mechanism. FIG. 14 is a cross-sectional view showing a portion of the beverage container with the lid in an open state (open position). FIG. 15 is a perspective view showing a part of a beverage container, showing the inside of the container body through the liquid passage opening.

First Embodiment
A cap unit 3 and a beverage container 1 equipped with the same according to a first embodiment of the present invention will be described with reference to Figures 1 to 8. In the following description, the cap unit 3 may be simply referred to as a cap, and the beverage container 1 may be simply referred to as a container.

As shown in Figures 1 and 2, the beverage container 1 of this embodiment comprises a cap unit 3 and a cylindrical container body 2 with a bottom to which the cap unit 3 is attached. The cap unit 3 is detachably attached to the opening of the container body 2 (the neck portion 2c described below) by threading, and forms a stopper that closes the opening of the container body 2 in an openable and closable manner.

The cap unit 3 comprises a cylindrical, i.e., capped cylindrical, cap body 10 having a top wall (ceiling wall), an opening gasket 60, a capped cylindrical lid body 20, a pressure release mechanism 80, a first hinge (hinge) 30 that rotatably connects the lid body 20 to the cap body 10, a waterproof gasket 70 that directly seals the space between the lid body 20 and the container body 2, and a lid locking mechanism 40.
The cap unit 3 and the container body 2 are arranged coaxially with each other around the central axis C.

In this embodiment, the direction in which the central axis C extends is referred to as the vertical direction. In the vertical direction, the direction from the bottom surface 2 a of the container body 2 to the lid top wall 20 a of the lid body 20 is referred to as the upper side, and the direction from the lid top wall 20 a to the bottom surface 2 a is referred to as the lower side.
The direction perpendicular to the central axis C is called the radial direction. Of the radial directions, the direction approaching the central axis C is called the radially inner direction or simply the inner direction, and the direction away from the central axis C is called the radially outer direction or simply the outer direction.
The direction going around the central axis C is called the circumferential direction.

Additionally, within the radial direction, the direction passing through the first hinge 30 and the central axis C is referred to as the front-rear direction. Within the front-rear direction, the direction from the first hinge 30 toward the central axis C is referred to as the front side, and the direction from the central axis C toward the first hinge 30 is referred to as the rear side.
The radial direction perpendicular to the front-to-rear direction is referred to as the left-to-right direction. When the beverage container 1 is in an upright position with the lid top wall 20a of the lid body 20 facing vertically upward as shown in Figure 2, the direction to the left of the left-to-right direction is referred to as the left side, and the direction to the right is referred to as the right side.

Note that the central axis C may be referred to as the cap central axis C or the container central axis C to distinguish it from the hinge central axis A described below. For ease of explanation, directions such as the radial direction and circumferential direction may be defined based on the central axis of a component other than the central axis C.

As shown in Figure 2, the beverage container 1 has a container body 2 with a vacuum insulation structure, which allows the beverage (liquid contents, liquid) contained in the container body 2 to be kept hot or cold. The container body 2 is cylindrical with an open top and a closed bottom. Note that the container body 2 may also contain contents other than beverages.

The container body 2 is made of a metal such as stainless steel. Specifically, the container body 2 has a cylindrical outer container 4 with a bottom and an inner container 5, with the inner container 5 housed inside the outer container 4 and the mouths of the two containers joined together to form a double-walled container.

As shown in Figure 3, the upper cylindrical end of the inner container 5 fits inside the upper cylindrical end of the outer container 4, and the upper cylindrical ends are welded together in this fitted state. This gives the upper opening 2d of the container body 2 a pointed shape known as a "bow welded structure."

A vacuum insulation layer 6 is provided between the outer container 4 and the inner container 5. The vacuum insulation layer 6 can be formed, for example, by blocking a vent hole provided in the center of the bottom surface of the outer container 4 in a chamber that has been depressurized (evacuated) to a high vacuum.

As shown in Figures 1 and 2, the container body 2 has a substantially disc-shaped bottom surface 2a, a substantially cylindrical body 2b whose lower end is connected to the outer periphery of the bottom surface 2a, a substantially cylindrical mouth/neck 2c that is located above the body 2b and has a smaller diameter than the body 2b, and a shoulder 2e that is substantially tapered and whose diameter decreases as it extends upward, connecting the upper end of the body 2b to the lower end of the mouth/neck 2c.

As shown in Figure 3, the inner periphery of the mouth and neck portion 2c has a smaller diameter than the inner periphery of the body portion 2b. The mouth and neck portion 2c has a protruding portion 8. The protruding portion 8 is located on the inner periphery of the mouth and neck portion 2c. The protruding portion 8 protrudes radially inward from the inner periphery of the mouth and neck portion 2c and extends around the entire circumferential direction. The protruding portion 8 is annular about the central axis C and protrudes most inward at the mouth and neck portion 2c. In other words, the protruding portion 8 protrudes toward the inside of the container body 2.

A male thread 7 is provided on the outer periphery of the neck portion 2c. The upper end of the neck portion 2c opens in a circular shape as the upper opening 2d of the container body 2. The diameter of the upper opening 2d of the container body 2 is, for example, 50 mm or less.

The beverage container 1 of this embodiment has an overall, generally cylindrical external shape as shown in Figure 1, but the external shape of the beverage container 1 is not particularly limited and can be modified as appropriate to suit the size, design, etc. Furthermore, the outer surfaces (surfaces) of the container body 2, cap body 10, and lid body 20 may be painted, printed, etc.

As shown in FIG. 3, the cap body 10 is attached to the upper opening 2d of the container body 2 and has a liquid passage 12 that connects the inside and outside of the container body 2. The cap body 10 is made of a heat-resistant resin such as polypropylene (PP).

The cap body 10 has a top wall portion 10a, a peripheral wall portion 10b, and a drinking spout portion 11. In this embodiment, the top wall portion 10a, the peripheral wall portion 10b, and the drinking spout portion 11 of the cap body 10 are integrally formed from a single member.
The top wall portion 10a covers the upper opening 2d of the container body 2 from above. The top wall portion 10a is generally annular plate-shaped. The top wall portion 10a has a packing accommodating groove 10c. The packing accommodating groove 10c is recessed upward from the underside of the top wall portion 10a and extends circumferentially. The packing accommodating groove 10c is an annular groove centered on the central axis C and opens downward.

The peripheral wall portion 10b is cylindrical and extends downward from the outer periphery of the top wall portion 10a. The peripheral wall portion 10b surrounds the entire circumferential direction of the mouth/neck portion 2c from the radially outer side. The lower end of the peripheral wall portion 10b faces or contacts the shoulder portion 2e from above with a gap. The peripheral wall portion 10b is approximately cylindrical and extends vertically so as to be continuous with the barrel portion 2b of the container body 2.

The peripheral wall portion 10b has a female thread portion 15 on its inner surface. The female thread portion 15 is threadedly engaged with the male thread portion 7 of the neck portion 2c. In other words, the cap body 10 is detachably attached by threading to the outside of the neck portion 2c while covering the upper opening 2d of the container body 2.

The drinking spout 11 is a curved wall or a generally cylindrical shape centered on the central axis C. In this embodiment, the drinking spout 11 is generally C-shaped and opens to the rear when viewed from above the cap body 10 (see Figure 7). The drinking spout 11 extends upward from the inner periphery of the top wall 10a.

As shown in Figure 3, the inner diameter of the spout 11 is approximately constant along the vertical direction. The outer diameter of the spout 11 is approximately constant along the vertical direction except for the lower end of the spout 11, and at the lower end, the outer diameter increases toward the bottom. In other words, the thickness of the spout 11 increases toward the bottom. In other words, the thickness of the spout 11 decreases toward the top. This ensures the rigidity of the spout 11 while making it easier to drink beverages.

The spout 11 is positioned above the upper opening 2d, and has a liquid passage 12 formed inside. The spout 11 is located directly above the upper opening 2d, meaning that it overlaps with the upper opening 2d when viewed from the top-bottom direction. More specifically, when viewed from the top-bottom direction, at least the lower end of the spout 11 and the upper opening 2d overlap. The spout 11 extends vertically so as to be continuous with the upper opening 2d.

As shown in Figure 5, the vertical dimension (height dimension) of the spout 11 decreases from the front end of the spout 11 toward the rear. Specifically, the height dimension of the spout 11 protruding upward from the top wall 10a decreases from the front end of the spout 11 toward the rear. In other words, the upper edge of the spout 11 slopes downward from the front end toward the rear. Specifically, in this embodiment, the front portion of the upper edge of the spout 11 forms a convex curve, while the left and right portions each form a concave curve that smoothly connects to the front portion.

As shown in FIG. 3, the opening gasket 60 is annular and centered on the central axis C. In this embodiment, the opening gasket 60 is in the form of a circular ring plate. Specifically, the cross section (longitudinal cross section) of the opening gasket 60 taken along the central axis C is rectangular in shape, with the radial dimension being longer than the vertical dimension. The opening gasket 60 is made of an elastically deformable material such as silicone rubber or elastomer.

The opening gasket 60 is placed in the gasket receiving groove 10c. The underside of the opening gasket 60 contacts the upper opening 2d of the container body 2. The opening gasket 60 seals the gap between the upper opening 2d of the container body 2 and the top wall portion 10a of the cap body 10.

In this embodiment, the opening gasket 60 is fixed to the cap body 10. Specifically, the opening gasket 60 may be formed integrally with the cap body 10 by two-color molding, or may be formed separately from the cap body 10 and then adhered to the cap body 10 with an adhesive or the like.

The lid 20 covers the drinking spout 11 and the liquid passage 12 of the cap body 10 from above. The lid 20 is a member that covers the drinking spout 11 and the liquid passage 12 in a manner that allows them to be opened and closed freely. The lid 20 has a portion (e.g., a portion other than the valve packing 82 described below) made of a heat-resistant resin such as polypropylene (PP).

As shown in Figures 1 and 3, the lid body 20 has a lid peripheral wall portion 20b formed in a generally cylindrical shape so as to be continuous with the peripheral wall portion 10b of the cap body 10, a lid top wall portion 20a connected to the upper end of the lid peripheral wall portion 20b, a stopper portion 21 protruding downward from the lid top wall portion 20a, an inner lid 81 attached to the stopper portion 21, and a valve gasket 82 attached to the inner lid 81.

As shown in Figure 3, the stopper 21 is inserted into the upper opening 2d through the inside of the spout 11. That is, the stopper 21 extends vertically and is positioned across the spout 11 (fluid passage 12) and the upper opening 2d.

The plug portion 21 has a bottomed, cylindrical plug tube 22 that hangs down from the lid top wall portion 20a, a female thread 23 provided on the inner surface of the peripheral wall of the plug tube 22, and an air vent 25 that penetrates the bottom wall 26 of the plug tube 22 in the vertical direction.

The stopper cylinder 22 has a bottomed cylindrical shape centered on the central axis C and extends in the vertical direction. The stopper cylinder 22 is disposed inside the spout portion 11 and inside the mouth/neck portion 2c.
The bottom wall 26 of the plug barrel 22 has a large diameter wall portion 26 a , a small diameter wall portion 26 b , a connecting wall portion 26 c , and a packing mounting flange 24 .

The large diameter wall portion 26a is in the shape of an annular plate centered on the central axis C. The outer periphery of the large diameter wall portion 26a is connected to the lower end of the peripheral wall of the plug cylinder 22.
The small diameter wall portion 26b is in the shape of an annular plate centered on the central axis C, has a smaller diameter than the large diameter wall portion 26a, and is disposed below the large diameter wall portion 26a.

The connecting wall portion 26c is cylindrical and centered on the central axis C, and connects the large diameter wall portion 26a and the small diameter wall portion 26b. The upper end of the connecting wall portion 26c is connected to the inner periphery of the large diameter wall portion 26a. The lower end of the connecting wall portion 26c is connected to the outer periphery of the small diameter wall portion 26b.

The packing mounting flange 24 protrudes radially outward from the connection between the small diameter wall portion 26b and the connecting wall portion 26c and extends around the entire circumferential direction. The packing mounting flange 24 is annular and has a center on the central axis C. The packing mounting flange 24 is positioned radially inward of the protruding portion 8 and faces the protruding portion 8 in the radial direction.

The ventilation hole 25 penetrates the small diameter wall portion 26b in the vertical direction. The ventilation hole 25 is a circular hole centered on the central axis C. The ventilation hole 25 connects the inside and outside of the container body 2. Specifically, the ventilation hole 25 connects the inside of the container body 2 with the inside of the stopper portion 21.

The inner lid 81 is detachably attached to the inside of the plug portion 21. The inner lid 81 is housed in the plug barrel 22.
The inner lid 81 has an inner lid body 83 , a male screw 84 , a packing mounting cylinder 85 , and an operating portion 86 .

As shown in Figure 8, the inner lid body 83 is cylindrical with a bottom and centered on the central axis C. The inner lid body 83 is placed inside the stopper tube 22.

3, the male thread 84 is provided on the outer peripheral surface of the inner lid main body 83. The male thread 84 is threadedly engaged with the female thread 23. By threading the male thread 84 and the female thread 23 together, the inner lid 81 is removably fastened to the stopper portion 21 with the screw.
In this embodiment, the pair of male thread 84 and female thread 23 that thread together may be simply referred to as a "screw." The screw is tightened by turning the inner lid 81 in one circumferential direction relative to the stopper tube 22, and loosened by turning it in the other circumferential direction. In this embodiment, the one circumferential direction, i.e., the tightening side of the screw, is the clockwise direction when viewed from above the cap when the cap unit 3 is viewed from above, and the other circumferential direction, i.e., the loosening side of the screw, is the counterclockwise direction when viewed from above the cap.

The packing mounting tube 85 is cylindrical and has a center on the central axis C, extending in the vertical direction. The packing mounting tube 85 protrudes downward from the underside of the bottom wall of the inner lid main body 83. In this embodiment, the outer diameter of the packing mounting tube 85 is smaller than the outer diameter of the inner lid main body 83.

The operating portion 86 is a portion that is grasped and operated by the user when rotating the inner lid 81 around the central axis C to tighten or loosen the screw.
6 and 8 , the operating portion 86 is in the form of a plate extending in the radial direction. Specifically, the operating portion 86 is in the form of a rectangular plate extending in the radial direction and the vertical direction, and both radial ends thereof are connected to the inner circumferential surface of the peripheral wall of the inner lid main body 83. The lower end of the operating portion 86 is connected to the upper surface of the bottom wall of the inner lid main body 83. The user can grasp the operating portion 86 with their fingers and rotate the inner lid 81 to one side in the circumferential direction or the other side in the circumferential direction.

As shown in Figures 3 and 8, the valve packing 82 is a generally cylindrical shape with a bottom and centered on the central axis C. The valve packing 82 is made of an elastically deformable material such as silicone rubber or elastomer. The valve packing 82 is detachably attached to the lower end of the inner lid 81. The valve packing 82 is housed within the stopper tube 22. The valve packing 82 closes the air vent 25 so as to be able to open and close freely.

As shown in FIG. 8, the valve packing 82 has a fitting cylindrical portion 82a, a dome portion 82b, and a flange portion 82c.
The fitting cylinder portion 82a has a cylindrical shape centered on a central axis C and extends in the vertical direction. The fitting cylinder portion 82a is fitted into the packing mounting cylinder 85.

The dome portion 82b has a dome shape that bulges downward. The outer periphery of the dome portion 82b is connected to the lower end of the fitting tube portion 82a. As shown in Figure 3, when the male thread 84 and female thread 23 are threaded together and the threads are tightened, the dome portion 82b blocks the air vent 25 from above. As shown in Figure 8, when the threads are loosened, the dome portion 82b is positioned above and spaced apart from the air vent 25, opening it.

The flange portion 82c protrudes radially outward from the outer peripheral surface of the fitting cylindrical portion 82a and extends circumferentially. The flange portion 82c is annular and has a plate shape centered on the central axis C. The outer peripheral portion of the flange portion 82c protrudes radially outward beyond the packing mounting cylinder 85. The upper surface of the flange portion 82c contacts the lower end surface of the packing mounting cylinder 85.

By providing the flange portion 82c on the valve packing 82, when attaching the valve packing 82 to the packing mounting cylinder 85, the fitting cylinder portion 82a can be easily pushed into the packing mounting cylinder 85, and the valve packing 82 can be accurately positioned in the vertical direction. Furthermore, when removing the valve packing 82 from the packing mounting cylinder 85, the flange portion 82c can be used as a grip, making it easy to remove the valve packing 82.

As shown in Figures 3 and 8, the pressure release mechanism 80 blocks communication between the inside and outside of the container body 2. Specifically, the pressure release mechanism 80 blocks communication through the air vent 25, and can open the air vent 25 to release pressure in the container body 2 when the internal pressure of the container body 2 changes (decreases or increases). The pressure release mechanism 80 includes the plug portion 21, air vent 25, valve gasket 82, inner lid 81, and screws (male thread 84 and female thread 23) described above. That is, in this embodiment, the pressure release mechanism 80 is provided in the lid body 20.

In addition, in this embodiment, an insulating structure using an air layer or insulating material (not shown) is provided throughout the interior of the packing mounting cylinder 85 and the interior of the valve packing 82. In other words, the lid 20 (pressure release mechanism 80) has an insulating structure using an air layer or insulating material.

Although not specifically shown, in this embodiment, the lid body 20 has a screw locking mechanism that maintains the male thread 84 and female thread 23 in a threaded engagement state (tightened state). The screw locking mechanism has a screw locking portion provided on the inner surface of the stopper tube 22 and a screw-receiving portion provided on the outer surface of the inner lid body 83, to which the screw locking portion is releasably engaged. The screw locking mechanism locks the male thread 84 and female thread 23 in a threaded engagement state, preventing the screw from unintentionally loosening. The screw locking mechanism can be released by, for example, having the user press the inner lid 81 downward while rotating it circumferentially to the other side (the side toward which the screw loosens).

As shown in Figure 3, the first hinge 30 is disposed at the rear of the cap unit 3. The first hinge 30 connects the upper rear end of the cap body 10 and the rear end of the lid body 20 so that they can rotate freely relative to each other around the hinge center axis A. The hinge center axis A of the first hinge 30 extends in the left-right direction. The center axis C and the hinge center axis A are twisted relative to each other.

The lid body 20 is connected to the cap body 10 via the first hinge 30, and is therefore rotatable about the hinge central axis A between the closed state (closed position) shown in Figures 3 and 6 and the open state (open position) shown in Figures 5 and 7. The closed position of the lid body 20 shown in Figures 3 and 6 is a position where the lid body 20 closes the opening (neck portion 2c) and the liquid passage 12 of the container body 2, and the open position of the lid body 20 shown in Figures 5 and 7 is a position where the lid body 20 opens the opening and the liquid passage 12 of the container body 2. Note that Figure 4 shows an intermediate state of the lid body 20 in transition between the closed state and the open state.

Although not specifically shown, the first hinge 30 has a torsion coil spring (biasing portion) that extends spirally around the hinge central axis A. The torsion coil spring biases the lid body 20 in the opening direction around the hinge central axis A relative to the cap body 10. In other words, a biasing force in the opening direction is applied to the lid body 20. Therefore, when the locked state by the lid locking mechanism 40 is released, the lid body 20 rotates from the closed position to the open position.

As shown in Figure 3, the waterproof gasket 70 is removably attached to the lower end of the plug portion 21. The waterproof gasket 70 is an annular sealing member made of, for example, silicone rubber or elastomer, and is elastically deformable. The waterproof gasket 70 is fitted into the bottom wall 26 of the plug tube 22.

The waterproof gasket 70 has a gasket body 71 , an inner flange 72 , and an outer flange 73 .
The packing body 71 is cylindrical and has a bottom, and is centered on the central axis C. The upper surface of the bottom wall of the packing body 71 contacts or faces across a gap with the lower surfaces of the small diameter wall portion 26b and the packing mounting flange 24. The peripheral wall of the packing body 71 surrounds the packing mounting flange 24 from the radial outside over the entire circumferential direction.

The packing body 71 has a circular through-hole 71a centered on the central axis C. The through-hole 71a is located in the center of the bottom wall of the packing body 71. When viewed from the top and bottom, the through-hole 71a is positioned so as to overlap the air vent 25. In this embodiment, the inner diameter of the through-hole 71a is approximately the same as the inner diameter of the air vent 25.

The inner flange 72 protrudes radially inward from the upper end of the peripheral wall of the packing body 71 and extends circumferentially. The inner flange 72 is annular and has a plate shape centered on the central axis C. The inner flange 72 is fitted between the lower surface of the large diameter wall portion 26a and the upper surface of the packing mounting flange 24. The packing mounting flange 24 is sandwiched between the bottom wall of the packing body 71 and the inner flange 72 in the vertical direction.

The outer flange 73 protrudes radially outward from the upper end of the peripheral wall of the packing body 71 and extends circumferentially. The outer flange 73 is annular and centered on the central axis C. The outer flange 73 is in liquid-tight contact with the protruding portion 8. This allows the watertight packing 70 to seal the gap between the plug portion 21 and the protruding portion 8.
In this embodiment, the "waterstop gasket 70 that directly seals the gap between the lid 20 and the container body 2" refers to a configuration in which the waterstop gasket 70 is in direct contact with the lid 20 (plug portion 21) and the container body 2 (projection portion 8), thereby sealing the gap between them. More specifically, the waterstop gasket 70 is not in contact with the cap body 10 or its drinking spout 11, but passes through the inside of the drinking spout 11, thereby coming into direct contact with the projection portion 8 of the container body 2.

As shown in Figures 3 and 4, in a vertical cross section along the central axis C, the outer flange 73 has a straight portion (flange base) 73a extending radially outward from the peripheral wall of the packing body 71, and a curved portion 73b connected to the outer periphery of the straight portion 73a and forming a curved shape that is convex radially outward.
The upper surface of the straight portion 73a contacts the lower surface of the large diameter wall portion 26a. The outer periphery of the curved portion 73b contacts the protruding portion 8.

The upper part of curved portion 73b extends in a curved manner downward as it moves radially outward from the connection with straight portion 73a. The lower part of curved portion 73b extends in a curved manner radially inward as it moves downward from the connection with the upper part. The thickness of curved portion 73b decreases from the connection with straight portion 73a to the tip (the inner peripheral end of the lower part). This allows curved portion 73b to be easily deformed while maintaining its rigidity, allowing it to come into close contact with protruding portion 8.

As shown in Figure 3, the lid locking mechanism 40 is located at the front of the cap unit 3. When the lid 20 is in the position where it closes the liquid passage port 12, i.e., when the lid 20 is in the closed position, the lid locking mechanism 40 secures the lid 20 to the cap body 10 against the biasing force of the torsion coil spring (biasing portion) of the first hinge 30.

Specifically, the lid locking mechanism 40 has a locking member 45 rotatably attached to the cap body 10 via a second hinge 44, and a ring stopper 46 rotatably attached to the cap body 10 via the second hinge 44. The hinge center axis (not shown) of the second hinge 44 is positioned outside the peripheral wall portion 10b of the cap body 10 and extends in the left-right direction.

The locking member 45 is rotatably supported by a second hinge 44 provided at the front end of the peripheral wall portion 10b of the cap body 10. The locking member 45 has a first extension portion 45a extending upward from the second hinge 44, and a second extension portion 45b extending downward from the second hinge 44.

A hook portion (engagement portion) 47 is provided at the tip end of the first extension portion 45a (the upper end portion of the locking member 45) and protrudes rearward. That is, the lid locking mechanism 40 has the hook portion 47, which is disposed at the front of the cap unit 3. The hook portion 47 is engaged with the lid body 20 or the cap main body 10, and in this embodiment, it is engaged with the lid body 20.
An elastic member 48, such as a compression coil spring, is disposed between the second extension 45b and the peripheral wall 10b in a state compressed in the front-rear direction. The elastic member 48 biases the second extension 45b forward.

As shown in FIG. 1, the ring stopper 46 is a member that extends in a generally arcuate curve, and both ends of the ring stopper 46 are rotatably supported by the second hinge 44. This allows the ring stopper 46 to rotate vertically around the second hinge 44.

As shown in Figure 3, the lid locking mechanism 40 also has a lock receiving portion (engaged portion) 49 to which the hook portion 47 of the locking member 45 is engaged, and a stopper receiving portion 50 to which the ring stopper 46 is hooked.

The lock receiving portion 49 is a claw-shaped portion that protrudes forward from the front lower end of the lid peripheral wall portion 20b of the lid body 20. The lock receiving portion 49 is engaged with the hook portion 47 when the upper surface of the lock receiving portion 49 comes into contact with the lower surface of the hook portion 47. In other words, the hook portion 47 is engaged with the lock receiving portion 49 arranged on the lid body 20.

The stopper receiving portion 50 is shaped to fit into the inner periphery of the ring stopper 46 and consists of a curved wall portion that protrudes forward from the front end of the lid peripheral wall portion 20b at a position that surrounds the periphery of the lock receiving portion 49.

In the lid locking mechanism 40, when the lid 20 closes the top of the cap body 10, the hook portion 47 of the locking member 45 engages with the lock receiving portion 49, maintaining the lid 20 in a closed position. From this position, the user can press the second extension portion 45b of the locking member 45 rearward against the biasing force of the elastic member 48. As shown in FIG. 4, the locking member 45 rotates around the second hinge 44 and the first extension portion 45a is displaced forward, releasing the hook portion 47 from the lock receiving portion 49. As a result, the lid 20 can be rotated in the open direction by the biasing force of the torsion coil spring in the first hinge 30, as shown in FIGS. 4 and 5.

Also, as shown in Figure 3, when the lid 20 closes the top of the cap body 10, the ring stopper 46 engages with the stopper receiving portion 50 to prevent the lid 20 from rotating in the opening direction. This prevents the lid 20 from opening due to unwanted (unintended) operation of the locking member 45.

In this embodiment, the front of the spout 11 protrudes above the lid locking mechanism 40. Specifically, when the lid 20 is in the open position shown in FIG. 5, the front of the spout 11 protrudes above at least the locking member 45 of the lid locking mechanism 40. That is, the front of the spout 11 protrudes above the hook portion 47. More specifically, it is preferable that the front of the spout 11 protrudes above the upper end of the hook portion 47 by an amount between 7 mm and 30 mm. This is because, when drinking a beverage contained in the container body 2, if the protrusion is less than 7 mm, the lower lip or chin will come into contact with the locking member 45, and if it exceeds 30 mm, the beverage container 1 will become too bulky. Furthermore, in this embodiment, when the lid 20 is in the closed position shown in FIG. 3, the front of the spout 11 protrudes above the ring stopper 46, which is hooked onto the stopper receiving portion 50 above the hook portion 47.

Furthermore, in this embodiment, the operation of the lid locking mechanism 40 (locking operation or unlocking operation) and the operation of the pressure release mechanism 80 described above (the operation of rotating the inner lid 81 in the circumferential direction) are independent of each other, and each operation is performed separately as needed.

According to the cap unit 3 and beverage container 1 of this embodiment described above, the cap body 10 has a drinking spout 11 that is connected to the upper side of the upper opening 2d of the container body 2. The drinking spout 11 forms a beverage flow path that continues from the upper opening 2d and has approximately the same diameter as the upper opening 2d, ensuring that the inner diameter (opening dimension) of the liquid passage 12 formed inside the drinking spout 11 is also large. Therefore, even with the cap unit 3 attached, the inside of the container body 2 is easy to see when the lid 20 is open.

This allows the amount of beverage remaining in the container body 2 to be visually confirmed through the liquid passage 12, and when drinking, the user can easily see how much the container needs to be tilted to cause the beverage to come out of the liquid passage 12, making it easier to time the drinking. In addition, the drinking spout 11 extends vertically to connect to the upper opening 2d, and there are no large steps or protrusions that would obstruct the flow of beverage in the part of the mouth-neck 2c above the protruding part 8 or inside the drinking spout 11, making it easier for the user to drink the beverage.
Furthermore, when refilling the container body 2 with beverage, the beverage can be poured in through the large diameter liquid passage port 12 without removing the cap unit 3, which improves workability.

In addition, this embodiment eliminates the need for components such as a mouth-forming member and a mouth-removal mechanism found in conventional cap units, thereby reducing the number of parts. Specifically, because the liquid passage 12 of the drinking spout 11 has a large diameter, when the lid body 20 is closed, a part of the lid body 20 (the stopper portion 21) can block the opening of the container body 2 (mouth-neck portion 2c) through the inside of this liquid passage 12. This makes it possible to eliminate components such as the mouth-forming member and mouth-removal mechanism that were previously found on the cap body 10, and reduces the number of parts that need to be washed when the cap unit 3 is disassembled and cleaned. Furthermore, assembly and disassembly are less time-consuming, and problems such as losing parts during disassembly are reduced.

In this embodiment, the opening dimensions of the liquid passage 12 are sufficiently wide, so it is possible to open the lid 20 and clean the inside of the container body 2 while the cap unit 3 remains attached to the neck portion 2c of the container body 2.

In addition, the front of the spout 11 protrudes above the hook portion (engagement portion) 47 of the lid locking mechanism 40. More specifically, when the lid 20 is in the open position, it protrudes at least above the locking member 45. This prevents the lower lip or chin from coming into contact with the locking member 45 (lid locking mechanism 40) and its hook portion 47 when the user places their mouth (lips) over the spout 11 from the front to drink. This allows the user to drink smoothly from the front of the cap unit 3, reducing discomfort during use and providing a comfortable feel.

Furthermore, because the drinking spout 11 is provided on the cap body 10, which is separate from the container body 2, it is easy to make the drinking spout 11 out of materials other than metal, such as resin. This ensures a pleasant mouthfeel when the user places their mouth on the drinking spout 11. It also makes it difficult for the heat of a hot beverage to be transferred to the drinking spout 11, making it easier for the user to place their mouth on the drinking spout 11 and drink even hot beverages.

As described above, this embodiment reduces the number of parts, improves assembly and disassembly workability, and reduces the risk of parts being lost. It also makes it easier to refill the beverage through the liquid passage 12 and to visually check when the beverage is coming out. It also provides a pleasant mouthfeel when the user places the drinking spout 11 to their mouth, and even hot beverages are easy to place on the drinking spout 11, making it comfortable to use and easy to drink.

In this embodiment, the waterproof gasket 70 seals the gap between the plug portion 21 of the lid 20 and the protruding portion 8 of the container body 2 .
In this case, when the lid body 20 is in the closed state, the waterproof gasket 70 can stably seal the gap between the lid body 20 and the container body 2 .

In addition, in this embodiment, the opening gasket 60 seals the space between the cap body 10 and the upper opening 2d, so that even if the user tilts the container when drinking a beverage, the beverage is prevented from leaking out from between the cap body 10 and the container body 2.
In this embodiment, the waterproof gasket 70 and the opening gasket 60 can seal two locations, the protrusion 8 and the upper opening 2d, making it possible to more reliably prevent beverage leakage.

In this embodiment, a pressure release mechanism 80 is provided that blocks communication between the inside and outside of the container body 2 .
For example, after a hot beverage is poured into the container body 2, as time passes and the beverage cools, the pressure inside the container body 2 decreases, and the lid 20 is pulled toward the inside of the container body 2, causing the watertight gasket 70 to stick tightly to the protruding portion 8, making it difficult to open the lid 20. Even in such a case, the pressure release mechanism 80 in this embodiment can release the reduced pressure inside the container body 2. That is, by rotating the inner lid 81 of the pressure release mechanism 80 toward the loosening screw and pulling it up, the state in which the valve gasket 82 has blocked the air vent 25 is released, and air is drawn in through the air vent 25, eliminating the pressure difference between the inside and outside of the container body 2 and making it easier to open the lid 20.

In this embodiment, the vertical dimension (height dimension) of the spout 11 decreases from the front end to the rear of the spout 11. In other words, the upper edge of the spout 11 slopes downward from the front end to the rear.
In this case, the shape of the spout 11 is designed to fit easily on the lips and not come into contact with the nose, etc., making it easier for the user to drink from the front side of the spout 11. Furthermore, even though the stopper 21 is provided hanging down from the lid top wall 20a of the lid 20, the stopper 21 is unlikely to interfere with the rear of the spout 11 when the lid 20 is rotated around the first hinge 30.

In this embodiment, the front portion of the upper edge of the spout 11 is convexly curved, and the left and right portions are each concavely curved and smoothly connect to the front portion.
Therefore, when a user places their lips on the front side of the drinking spout 11, their lips easily fit the shape of the upper edge of the drinking spout 11, making it easier to drink the beverage.

In this embodiment, as described above, the watertight gasket 70 is designed to seal the gap between the plug portion 21 of the lid 20 and the protruding portion 8 of the container body 2, and the watertight gasket 70 does not come into contact with the drinking spout 11, allowing for greater freedom in the shape of the drinking spout 11. Therefore, as in this embodiment, by ensuring a large inner diameter for the drinking spout 11 and eliminating any steps on the inner circumferential surface along the vertical direction, it is possible to improve visibility inside the container and the ease of flow of the beverage, and by giving the upper edge of the drinking spout 11 a rounded shape, it is possible to further improve the mouthfeel.

In this embodiment, the opening packing 60 is fixed to the cap body 10 .
In this case, since the cap body 10 and the opening packing 60 are integrated, the opening packing 60 can be washed together with the cap body 10, making it easy to handle. In addition, loss of the opening packing 60 can be prevented.

In this embodiment, a pressure release mechanism 80 is provided in the cover 20 .
In this case, it is easy for the user to operate the pressure release mechanism 80 .

In this embodiment, the pressure release mechanism 80 and the lid lock mechanism 40 are operated separately.
In this case, the pressure in the container body 2 can be released only when a pressure release operation is required. Furthermore, the structures of the pressure release mechanism 80 and the lid lock mechanism 40 can each be simplified.

In this embodiment, the cover 20 (pressure release mechanism 80) has a heat insulating structure using an air layer or a heat insulating material.
In this case, the temperature of the hot beverage in the container body 2 can be prevented from decreasing or the temperature of the cold beverage can be prevented from increasing through the lid body 20 or the pressure release mechanism 80, thereby maintaining the beverage at an appropriate temperature.

In this embodiment, the stopper portion 21 is disposed inside the drinking spout portion 11 .
In this embodiment, the spout 11 protrudes upward from the top wall 10a, making it easy to ensure a large vertical dimension for the stopper 21 placed inside the spout 11. This makes it easy to ensure space for the pressure release mechanism 80 and heat insulation structure in the stopper 21.

In this embodiment, the diameter of the upper opening 2d of the container body 2 is 50 mm or less.
In this case, when a hot beverage is poured into the container body 2 and the inside becomes positive pressure (positive pressure), even if the lid body 20 is in the open state, the opening sound (popping sound) associated with the release of the internal pressure of the container can be kept small.

The present invention is not limited to the first embodiment described above, and configuration changes, etc., are possible without departing from the spirit of the present invention, as described below, for example.

In the first embodiment described above, an example was given in which the opening packing 60 was fixed integrally to the cap body 10, but the present invention is not limited to this.
Figure 9 is a partial cross-sectional view showing a modified example of the cap unit 3 and beverage container 1 described in the first embodiment. In this modified example, an opening gasket 61 is provided separately from the cap body 10 and is detachably attached to the cap body 10. The opening gasket 61 is annular about the central axis C and is made of an elastically deformable material such as silicone rubber or elastomer. The opening gasket 61 is placed in the gasket receiving groove 10c. In Figure 9, the opening gasket 61 is shown by a two-dot chain line (phantom line) to represent its shape before elastic deformation.

The opening packing 61 has a seal flange 61a and a flange connecting tube 61b. A pair of seal flanges 61a are provided with a gap between them in the vertical direction. Each seal flange 61a is annular plate-shaped. The flange connecting tube 61b is cylindrical and connects the inner peripheries of the pair of seal flanges 61a to each other. Specifically, the upper end of the flange connecting tube 61b is connected to the inner periphery of the upper seal flange 61a, and the lower end of the flange connecting tube 61b is connected to the inner periphery of the lower seal flange 61a.
According to this modification, the opening packing 61 can be easily elastically deformed, and the sealing performance of the opening packing 61 can be improved more stably.

In the first embodiment described above, an example was given in which the locking member 45 of the lid locking mechanism 40 was configured to be rotatable around the second hinge 44, but this is not limited to this. Although not specifically shown, the locking member may also be configured to be slidable in the front-to-rear direction. In this case, too, the locked state of the lid body 20 by the lid locking mechanism is released by pressing the locking member rearward.

Second Embodiment
Next, a cap unit 103 and a beverage container 101 equipped with the same according to a second embodiment of the present invention will be described with reference to Figures 10 to 15. In this embodiment, the same components as those in the previous embodiment may be given the same names and symbols, and their description may be omitted. Furthermore, the definitions of directions are the same as those in the previous embodiment unless otherwise specified.

As shown in Figures 10 and 11, the beverage container 101 of this embodiment comprises a cap unit 103 and a container body 2 to which the cap unit 103 is attached. The cap unit 103 and the container body 2 are arranged coaxially with respect to a central axis C.

The cap unit 103 is detachably attached to the container body 2, which has an open top. The cap unit 103 includes the cap body 10, an opening gasket 110, a lid body 20, a pressure release mechanism 130, a first hinge 30, a watertight gasket 70, and a lid locking mechanism 140.

The cap unit 103 of this embodiment differs from the cap unit 3 described in the previous embodiment in the configuration of the drinking spout 11, opening gasket 110, lid body 20, pressure release mechanism 130, and lid locking mechanism 140.

As shown in Figure 15, in this embodiment, the spout 11 is in the shape of a circular ring centered on the central axis C. As shown in Figure 11, the inner diameter of the spout 11 is substantially constant along the vertical direction, and more specifically, it becomes slightly smaller toward the bottom. The outer diameter of the spout 11 also becomes larger toward the bottom. In other words, the thickness of the spout 11 becomes thicker toward the bottom and thinner toward the top. This ensures the rigidity of the spout 11 while making it easier to drink beverages.
Furthermore, when viewed from the top-bottom direction, at least the lower end of the drinking spout 11 and the upper opening 2d are arranged to overlap each other.

The opening gasket 110 is elastically deformable and seals the gap between the cap body 10 and the upper opening 2d. In this embodiment, the opening gasket 110 is removable from the container body 2 and the cap body 10. However, this is not a limitation, and the opening gasket 110 may be fixed to the cap body 10 by adhesive or other means so that it cannot be removed.

The opening gasket 110 is positioned above the protruding portion 8 and below the drinking spout portion 11. As shown in Figure 11, the opening gasket 110 has a generally U-shape that opens downward when viewed in cross section (longitudinal cross section) along the central axis C. The opening gasket 110 has an inner tube portion 111, an outer tube portion 112, and a connecting portion 113.

The inner tube portion 111 is cylindrical and centered on the central axis C, extending in the vertical direction. The inner tube portion 111 fits inside the upper end (upper opening 2d) of the mouth/neck portion 2c. The inner circumferential surface of the inner tube portion 111 is located radially outward from the inner circumferential end (innermost end) of the protruding portion 8. The inner circumferential surface of the inner tube portion 111 is also roughly flush with the inner circumferential surface of the drinking spout portion 11, i.e., the liquid passage opening 12, or is located slightly radially inward from the liquid passage opening 12.

By providing the inner tube portion 111, it is possible to prevent the formation of large steps or protrusions that would obstruct the flow of beverage from the protruding portion 8 toward the liquid passage port 12. This allows the beverage to flow more smoothly, making it easier for the user to drink. Furthermore, by preventing the formation of depressions that could trap beverages between the protruding portion 8 and the drinking spout portion 11, it is possible to prevent liquid from remaining in the area.

The outer tube portion 112 is cylindrical and has a center on the central axis C, and extends in the vertical direction. The outer tube portion 112 fits onto the outside of the upper end portion (upper opening 2d) of the mouth/neck portion 2c. The outer peripheral surface of the outer tube portion 112 contacts or faces the upper end portion of the inner peripheral surface of the peripheral wall portion 10b with a gap therebetween.

The connecting portion 113 is annular and has a plate shape centered on the central axis C, and extends in a direction perpendicular to the central axis C. The connecting portion 113 is disposed in the packing accommodating groove 10c. The inner peripheral portion of the connecting portion 113 is connected to the upper end of the inner cylindrical portion 111. The outer peripheral portion of the connecting portion 113 is connected to the upper end of the outer cylindrical portion 112.

The lid body 20 is connected to the cap body 10 via the first hinge 30, and is therefore freely rotatable around the hinge center axis A between the closed state (blocked position) shown in Figures 10 and 11 and the open state (open position) shown in Figures 14 and 15.
12 and 13 are diagrams illustrating the steps of operating the lid 20 to open from a closed state. Specifically, Fig. 12 illustrates a state in which the pressure release mechanism 130 of this embodiment has connected the inside and outside of the container body 2 (i.e., a state in which the pressure inside the container body 2 has been released), and Fig. 13 illustrates a state in which the lid 20 has been released from the fixation (lock) of the lid lock mechanism 140 of this embodiment.

As shown in FIG. 11 , the lid body 20 has a guide recess 27 recessed downward from the upper surface of the lid top wall 20a, a guide hole 28 positioned inside the guide recess 27 and vertically penetrating the lid top wall 20a, an inner wall 20c extending downward from the lid top wall 20a, a support tube 141 attached to the inner wall 20c, a push-in member 142 extending vertically through the bottom wall of the support tube 141, a stopper 121 positioned below the support tube 141 and supported by the push-in member 142, a valve gasket 131 providing a seal between the push-in member 142 and the stopper 121, a notch 20d positioned at the front end of the lid peripheral wall 20b, an attachment recess 29 formed in the lid peripheral wall 20b, and an anti-slip member 31 fitted into the attachment recess 29.

In this embodiment, the guide recess 27 is a groove extending in the front-rear direction and is disposed approximately in the center of the lid top wall portion 20a.
The guide hole 28 is a circular hole and is disposed in the center of the guide recess 27 in the front-rear direction.

The inner wall portion 20c extends downward from the underside of the lid top wall portion 20a and is roughly C-shaped when viewed from below. The inner wall portion 20c is positioned outside the guide hole 28 and extends in a curved manner to surround the guide hole 28 (see Figure 15).

The support tube 141 is a generally bottomed tube that opens upward. The support tube 141 is positioned below the lid top wall portion 20a and fits within the inner wall portion 20c. The support tube 141 is immovably fixed to the inner wall portion 20c by undercut fitting or the like. The inner diameter of the support tube 141 is larger than the inner diameter of the guide hole 28. The support tube 141 is positioned inside the drinking spout portion 11.

The support tube 141 has a guide tube 141a, an insertion hole 141b, a lower restriction pin 141c, and an upper protruding pin 141d.

The guide tube 141a protrudes upward from the bottom wall of the support tube 141. The guide tube 141a is cylindrical and extends in the vertical direction.

The insertion hole 141b is disposed inside the guide tube 141a and constitutes the internal space of the guide tube 141a. The insertion hole 141b is a circular hole that extends vertically and penetrates the bottom wall of the support tube 141 in the vertical direction. That is, the insertion hole 141b opens at the upper end surface of the guide tube 141a and at the lower surface of the bottom wall of the support tube 141. In this embodiment, the central axis C passes through the interior of the insertion hole 141b. That is, the insertion hole 141b is located on the central axis C.

The lower regulating pin 141c protrudes upward from the bottom wall of the support tube 141. The lower regulating pin 141c is columnar and extends in the vertical direction, and in this embodiment is rectangular. The lower regulating pin 141c is positioned forward of the guide tube 141a. The amount by which the lower regulating pin 141c protrudes upward from the bottom wall of the support tube 141 is greater than the amount by which the guide tube 141a protrudes upward from the bottom wall of the support tube 141. The upper end surface of the lower regulating pin 141c is located above the upper end surface of the guide tube 141a.

The upper protruding pin 141d protrudes upward from the front end of the bottom wall of the support tube 141. The upper protruding pin 141d is cylindrical or columnar and extends in the vertical direction. The upper protruding pin 141d is positioned forward of the guide tube 141a and the lower restriction pin 141c.

The pushing member 142 is positioned below the lid top wall portion 20a. The pushing member 142 is located directly below the guide hole 28. The pushing member 142 has a generally disk-shaped pushing body 150 that extends in a direction perpendicular to the central axis C, and a columnar valve stem 151 that extends vertically downward from the pushing body 150.

The pusher body 150 is positioned above the guide tube 141a. The pusher body 150 has a flange (not shown) that protrudes radially outward from the outer peripheral surface of the pusher body 150 and extends circumferentially. The outer diameter of the flange is larger than the inner diameter of the guide hole 28. The flange contacts the lower surface of the lid top wall portion 20a, in the area surrounding the guide hole 28, from below. This restricts the pusher body 150 (pushing member 142) from moving above the guide hole 28.

Although not specifically shown, the pusher body 150 has a guide slit that extends vertically and cuts out a portion of the flange. A guide rib (not shown) that protrudes radially inward from the inner circumferential surface of the inner wall portion 20c and extends vertically engages with the guide slit. This engagement restricts circumferential rotation and radial movement (front-to-back, left-to-right, etc.) of the pusher body 150 (pushing member 142). Furthermore, the guide slit slides vertically relative to the guide rib, allowing the pusher body 150 (pushing member 142) to move freely vertically. The pusher member 142 is biased upward by a pusher biasing member 148, described below, which holds the flange pressed against the underside of the lid top wall portion 20a.

The pusher body 150 also has a guide recess 150a. The guide recess 150a is a generally slit-shaped recess that penetrates the pusher body 150 in the vertical direction and extends in the front-to-rear direction. The guide recess 150a opens at the front end of the top, bottom, and outer peripheral surface of the pusher body 150. The rear end of the guide recess 150a is recessed toward the rear.

The valve stem 151 protrudes downward from the underside of the push-in body 150. The valve stem 151 is inserted into the insertion hole 141b. The valve stem 151 extends vertically from the upper side of the guide tube 141a to the lower side of the bottom wall of the support tube 141. In other words, the valve stem 151 has a portion that protrudes below the bottom wall of the support tube 141. The valve stem 151 is guided by the guide tube 141a and the insertion hole 141b so that it can slide vertically.

In this embodiment, the valve stem 151 is located on the central axis C. More specifically, the central axis (not shown) of the valve stem 151 is positioned close to the central axis C, but slightly rearward of the central axis C. However, this is not a limitation, and the central axis of the valve stem 151 and the central axis C may be positioned coaxially with each other.

The valve stem 151 has a valve packing support portion 151a and a pushing surface 151b. The valve packing support portion 151a and the pushing surface 151b are located on a portion of the valve stem 151 that protrudes below the bottom wall of the support tube 141.

The valve packing support portion 151a is disposed at the lower end of the valve stem 151. The valve packing support portion 151a is flange-shaped and protrudes radially outward from the lower end of the outer circumferential surface of the valve stem 151 in a direction perpendicular to the central axis of the valve stem 151. The upper surface of the valve packing support portion 151a is flat and extends in a direction perpendicular to the central axis of the valve stem 151. At least the outer circumferential portion of the lower surface of the valve packing support portion 151a is tapered, and extends upward as it moves radially outward in a direction perpendicular to the central axis of the valve stem 151.

The pushing surface 151b is located on the outer circumferential surface of the valve stem 151, at a portion located above the valve packing support portion 151a. The pushing surface 151b faces at least downward, and in this embodiment, is tapered. The pushing surface 151b is an annular surface centered on the central axis of the valve stem 151, and extends upward as it moves radially outward, perpendicular to the central axis of the valve stem 151.

The stopper portion 121 is inserted into the upper opening 2d through the inside of the drinking spout portion 11. The stopper portion 121 is positioned inside the neck portion 2c. The stopper portion 121 has a cylindrical body 122 and a gasket mounting flange 123.

The cylinder 122 is cylindrical and has a bottom, and extends in the vertical direction. The cylinder 122 has an air vent 125 that penetrates the bottom wall of the cylinder 122 in the vertical direction, and a receiving surface 126 that is positioned around the air vent 125 on the bottom wall of the cylinder 122.

The vent hole 125 is a circular hole extending in the vertical direction. A valve stem 151 is inserted through the interior of the cylindrical body 122 and the vent hole 125. The valve packing support portion 151a of the valve stem 151 is positioned below the bottom wall of the cylindrical body 122. The pushing surface 151b of the valve stem 151 is positioned above the bottom wall of the cylindrical body 122.

The receiving surface 126 faces at least upward and, in this embodiment, is tapered. The receiving surface 126 is an annular surface centered on the central axis of the cylindrical body 122, and extends upward as it moves radially outward, perpendicular to the central axis of the cylindrical body 122. The receiving surface 126 faces the pushing surface 151b with a gap in the vertical direction.

The packing mounting flange 123 is a flange-shaped member that protrudes radially outward from the lower end of the outer peripheral surface of the cylindrical body 122, perpendicular to the central axis of the cylindrical body 122. When viewed radially, the packing mounting flange 123 overlaps with the protruding portion 8.

The valve packing 131 is made of an elastically deformable material such as silicone rubber or elastomer. The valve packing 131 is generally cylindrical and extends in the vertical direction. The lower end of the valve stem 151 fits within the valve packing 131. The lower end surface of the valve packing 131 contacts the upper surface of the valve packing support portion 151a. The upper end surface of the valve packing 131 contacts the lower surface of the bottom wall of the cylindrical body 122 (i.e., the lower surface of the stopper portion 121). The provision of the valve packing 131 blocks communication between the inside and outside of the container body 2 through the air vent 125. As the pushing member 142 moves downward, the valve packing 131 moves downward with the pushing member 142, and the upper end surface of the valve packing 131 moves away from the lower surface of the stopper portion 121. In other words, the valve packing 131 releasably blocks the air vent 125.

As shown in Figures 10 and 11, the notch 20d is a notch provided in the front lower end of the lid peripheral wall 20b. The notch 20d penetrates the lid peripheral wall 20b in the front-to-rear direction. The notch 20d opens on the outer and inner surfaces of the lid peripheral wall 20b and also on the lower end surface of the lid peripheral wall 20b. When viewed from the front of the lid 20, the notch 20d has a generally U-shape that opens downward.

The mounting recess 29 is recessed radially inward from the outer peripheral surface of the lid peripheral wall portion 20b and is a groove-like shape that extends circumferentially. The mounting recess 29 is arranged on the outer peripheral surface of the lid peripheral wall portion 20b, extending in a roughly C-shape. Specifically, the mounting recess 29 is arranged on the outer peripheral surface of the lid peripheral wall portion 20b except for the rear end portion. The mounting recess 29 is arranged above the cutout portion 20d.

The anti-slip member 31 is made of an elastic material such as heat-resistant rubber or elastomer, such as silicone rubber, and is generally C-shaped with a partially open circumferential edge. The anti-slip member 31 is removably attached to the mounting recess 29. Alternatively, the anti-slip member 31 may be permanently fixed to the mounting recess 29. When the anti-slip member 31 is attached to the mounting recess 29, the outer surface of the anti-slip member 31 is disposed substantially flush with the outer surface of the lid peripheral wall portion 20b so as to be continuous with it. The provision of the anti-slip member 31 makes it easier for the user to grip the lid body 20 and to operate the operation button 143, which will be described later.

Although not specifically shown, the anti-slip member 31 covers the end of the first hinge 30 (its metal shaft) and the end of the second hinge 144 (described below) (its metal shaft). Therefore, the anti-slip member 31 protects the first hinge 30 and the second hinge 144 while improving the waterproofing of the first hinge 30 and the second hinge 144. This makes it possible to prevent the first hinge 30 and the second hinge 144 from being damaged or falling off, or from rusting.

The lid locking mechanism 140 is disposed from the front to the center of the cap unit 103 in the front-to-rear direction. As shown in FIG. 11 , the lid locking mechanism 140 secures the lid 20 to the cap body 10 against the biasing force of the torsion coil spring (biasing portion) of the first hinge 30 when the lid 20 is in the position where it closes the liquid passage port 12, i.e., when the lid 20 is in the closed position. In other words, the lid locking mechanism 140 secures the lid 20 to the cap body 10 in the closed position.

The lid locking mechanism 140 includes a locking member 145 rotatably attached to the lid body 20 via a second hinge 144, the aforementioned pushing member 142 that engages with the inner wall portion 20c and the support cylinder 141 so as to be movable up and down, an operation button 143 that can slide forward and backward relative to the pushing member 142, a lock biasing member 146, a pushing biasing member 148, and a slide biasing member 152. The hinge center axis (not shown) of the second hinge 144 is located inside the lid peripheral wall portion 20b of the lid body 20 and extends in the left-right direction.

The locking member 145 is rotatably supported by a second hinge 144 provided at the front end of the lid peripheral wall 20b of the lid body 20. The locking member 145 has a first extension 145a extending downward from the second hinge 144, and a second extension 145b extending upward from the second hinge 144 and then extending rearward.

The lower end of the first extension 145a is positioned within the cutout 20d and is exposed to the outside of the cap from the outer peripheral surface of the lid peripheral wall 20b. The surface facing radially outward (outer surface) of the lower end of the first extension 145a is positioned approximately flush with the outer peripheral surface of the lid peripheral wall 20b.

The first extension 145a other than its lower end and the second extension 145b are disposed inside the lid peripheral wall 20b.
Due to this configuration, when the lid 20 is locked in the closed position by the lid locking mechanism 140 (closed state shown in Figure 11), the locking member 145 does not protrude radially outward from the outer peripheral surface of the lid 20.

A hook portion (engagement portion) 147 protrudes rearward from the tip of the first extension portion 145a (the lower end of the locking member 145). That is, the lid locking mechanism 140 has the hook portion 147, which is located at the front of the cap unit 103. The hook portion 147 engages with the lid body 20 or the cap body 10, and in this embodiment, it engages with the cap body 10.

The lid locking mechanism 140 also has a lock receiving portion (engaged portion) 149 to which the hook portion 147 of the locking member 145 is engaged.
The lock receiving portion 149 is a claw-like portion that protrudes forward from the front upper end portion of the peripheral wall portion 10b of the cap body 10. The lower surface of the lock receiving portion 149 comes into contact with the upper surface of the hook portion 147, thereby locking the lock receiving portion 149 to the hook portion 147. In other words, the hook portion 147 is locked to the lock receiving portion 149 that is arranged on the cap body 10.

In this embodiment, the front of the spout 11 protrudes above the hook 147. Furthermore, when the lid 20 is in the open position shown in Figure 14, the front of the spout 11 protrudes above the lock receiver 149 that engages with the hook 147.

As shown in FIG. 11, the second extension 145b has an outer portion 145ba that is curved and convex upward when viewed from the left and right, an inner portion 145bb that is positioned radially inward of the outer portion 145ba, and a lower protruding pin 145c.

The outer portion 145ba is positioned above the front of the spout 11. The outer portion 145ba extends in a curved manner, surrounding the front end of the upper edge of the spout 11 from the front, top, and rear. Therefore, in this embodiment, even while the locking member 145 is positioned inside the lid 20, the vertical bulk of the lid 20 is kept to a minimum, and the front of the spout 11 can protrude upwardly from the top wall 10a to a large extent.

The inner portion 145bb is connected to the radially inner end of the outer portion 145ba and extends in the front-to-rear direction. When viewed from the top-to-bottom direction, the inner portion 145bb overlaps with the front end of the bottom wall of the support tube 141. Furthermore, when viewed from the top-to-bottom direction, at least the radially inner end of the inner portion 145bb is positioned within the guide hole 28. In other words, the inner portion 145bb protrudes inward from the guide hole 28.

The lower protruding pin 145c protrudes downward from the inner portion 145bb. The lower protruding pin 145c is columnar and extends in the vertical direction. The lower protruding pin 145c is positioned directly above the upper protruding pin 141d.

The operation button 143 is located on the top of the lid 20. The operation button 143 is generally disc-shaped and extends in a direction perpendicular to the central axis C. The outer diameter of the operation button 143 is smaller than the inner diameter of the guide hole 28. As shown in Figures 11 to 13, the operation button 143 can be inserted vertically through the guide hole 28. In other words, the operation button 143 can move between the upper and lower sides of the lid top wall portion 20a through the guide hole 28.

Furthermore, as shown in FIG. 11, when the disc-shaped portion of the operation button 143 (the upper portion of the operation button 143, which may also be referred to as the operation main body portion) is positioned above the lid top wall portion 20a, the operation button 143 can slide back and forth within the guide recess 27.

When the operation button 143 is in the forward end position shown in Figure 11, the front end of the operation button 143 overlaps the front end of the guide recess 27 when viewed from the top and bottom. When the operation button 143 is in the retracted end position shown in Figures 12 and 13, the operation button 143 is positioned (housed) within the guide hole 28 when viewed from the top and bottom.

As shown in FIG. 11, the operation button 143 has a guide protrusion 143a, an upper restriction pin 143b, and a rear protruding pin 143c.

The guide protrusion 143a protrudes downward from the disc-shaped portion (operation main body) of the operation button 143 and extends in the front-to-rear direction. The guide protrusion 143a engages with the guide recess 150a of the pusher member 142 so that it can slide freely in the front-to-rear direction. This engagement allows the operation button 143 to slide in the front-to-rear direction relative to the pusher member 142. This engagement also restricts the up-down and left-to-right movement of the operation button 143 relative to the pusher member 142.

The upper restriction pin 143b is positioned below the disc-shaped portion of the operation button 143. In this embodiment, the upper restriction pin 143b protrudes downward from the guide protrusion 143a. The upper restriction pin 143b is columnar and extends in the vertical direction, and in this embodiment is rectangular.

When the operation button 143 is in the forward end position shown in Figure 11, the lower end surface of the upper restriction pin 143b faces the upper end surface of the lower restriction pin 141c. Therefore, when the operation button 143 is in the forward end position, the contact between the upper restriction pin 143b and the lower restriction pin 141c restricts the downward movement of the operation button 143 and the push-in member 142.

Furthermore, when the operation button 143 is in the retracted end position shown in Figures 12 and 13, the upper restriction pin 143b is positioned further rearward than the lower restriction pin 141c, and the lower end surface of the upper restriction pin 143b and the upper end surface of the lower restriction pin 141c do not face each other. Therefore, when the operation button 143 is in the retracted end position, downward movement of the operation button 143 and the push-in member 142 is permitted.

As shown in FIG. 11, the rear protruding pin 143c is positioned below the disk-shaped portion of the operation button 143. In this embodiment, the rear protruding pin 143c protrudes rearward from the upper restriction pin 143b. The rear protruding pin 143c is columnar and extends in the front-to-rear direction.

The lock biasing member 146 is an elastically deformable device such as a compression coil spring. The lock biasing member 146 is disposed within the support tube 141 and extends in the vertical direction. An upper protruding pin 141d is inserted into the lower end of the lock biasing member 146. A lower protruding pin 145c is inserted into the upper end of the lock biasing member 146. The lower end of the lock biasing member 146 contacts the bottom wall of the support tube 141 from above. The upper end of the lock biasing member 146 contacts the inner portion 145bb of the second extension portion 145b from below. The lock biasing member 146 biases the locking member 145 toward one side around the second hinge 144 (in Figure 11, this is the counterclockwise direction around the second hinge 144, which may also be referred to as the locking direction).

The pushing biasing member 148 is an elastically deformable member, such as a compression coil spring. The pushing biasing member 148 is disposed within the support tube 141 and extends in the vertical direction. The valve stem 151 is inserted into the pushing biasing member 148. The guide tube 141a is inserted into the lower end of the pushing biasing member 148. The lower end of the pushing biasing member 148 contacts the bottom wall of the support tube 141 from above. The upper end of the pushing biasing member 148 contacts the lower surface of the pushing body 150 from below. The pushing biasing member 148 biases the pushing member 142 and the operation button 143 that engages with the pushing member 142 upward.

The slide biasing member 152 is an elastically deformable member such as a compression coil spring. The slide biasing member 152 is disposed within the guide recess 150a and extends in the front-to-rear direction. The rear protruding pin 143c is inserted into the front end of the slide biasing member 152. The front end of the slide biasing member 152 contacts the rear surface of the upper restriction pin 143b from the rear side. The rear end of the slide biasing member 152 contacts the surface of the guide recess 150a located at the rear end and facing forward from the front side. The slide biasing member 152 biases the operation button 143 toward the front.

The pressure release mechanism 130 blocks communication between the inside and outside of the container body 2. More specifically, the pressure release mechanism 130 blocks communication through the vent hole 125, and can open the vent hole 125 to release pressure in the container body 2 when the internal pressure of the container body 2 changes (decreases or increases). The pressure release mechanism 130 includes the stopper portion 121, vent hole 125, valve gasket 131, push-in member 142, and operation button 143 described above. That is, in this embodiment, the pressure release mechanism 130 is provided in the lid body 20.

The watertight gasket 70 is detachably attached to the plug portion 121. The watertight gasket 70 is fitted onto the gasket mounting flange 123 of the plug portion 121. The watertight gasket 70 has a cylindrical gasket body 71 with a bottom, an inner flange 72 that protrudes radially inward from the upper end of the peripheral wall of the gasket body 71, and an outer flange 73 that protrudes radially outward from the upper end of the peripheral wall of the gasket body 71.

The upper surface of the bottom wall of the packing body 71 contacts the lower surface of the packing mounting flange 123. The peripheral wall of the packing body 71 surrounds the packing mounting flange 123 from the radial outside along the entire circumferential direction.

The packing body 71 has a circular communication hole 71a centered on the central axis C. The communication hole 71a is located in the center of the bottom wall of the packing body 71. When viewed from the top and bottom, the communication hole 71a is positioned so as to overlap with the air vent 125. In this embodiment, the inner diameter of the communication hole 71a is larger than the inner diameter of the air vent 125. A valve packing 131 is positioned inside the communication hole 71a.

The lower surface of the inner flange 72 contacts the upper surface of the packing mounting flange 123 .
The outer flange 73 is in liquid-tight contact with the protruding portion 8. As a result, the waterproof gasket 70 seals the gap between the plug portion 121 and the protruding portion 8. That is, in this embodiment as well, the waterproof gasket 70 directly seals the gap between the lid body 20 (plug portion 121) and the container body 2 (protruding portion 8).

Next, a method of using (opening) the cap unit 103 of this embodiment will be described.
With the cover 20 in the closed and locked state shown in FIG. 11 , the user slides (moves backward) the operation button 143 from the forward end position to the backward end position against the biasing force of the slide biasing member 152.

When the user presses the operation button 143 downward against the biasing force of the push-in biasing member 148 from the state in which the operation button 143 has been moved to the retracted end position, as shown in FIG. 12, the operation button 143 is inserted into the guide hole 28. At this time, the push-in member 142 moves downward along with the operation button 143, and the upper end surface of the valve packing 131 moves downward away from the lower surface of the plug portion 121, connecting the air vent 125 to the inside of the container body 2. This places the inside and outside of the container body 2 in communication via the air vent 125 (i.e., the pressure within the container body 2 is released). At this time, the push-in surface 151b of the valve stem 151 contacts the receiving surface 126 of the plug portion 121 from above.

When the user presses the operation button 143 further downward, as shown in Figure 13, the front end of the disc-shaped portion (operation main body) of the operation button 143 presses the second extension portion 145b of the locking member 145 downward, and the locking member 145 rotates to the other side around the second hinge 144 (clockwise around the second hinge 144 in Figure 13, which may also be referred to as the unlocking direction) against the biasing force of the lock biasing member 146. This displaces the first extension portion 145a forward, and the hook portion 147 is released from the lock receiving portion 149.

When the lock receiving portion 149 and the hook portion 147 are disengaged, the lid 20 enters an unlocked state, and the urging force of the torsion coil spring of the first hinge 30 causes the lid 20 to rotate in the open direction, resulting in the open state of the lid 20 shown in Figures 14 and 15.

The cap unit 103 and beverage container 101 of this embodiment described above also provide the same effects as those of the previous embodiment.
More specifically, in this embodiment, the front of the spout 11 protrudes above the hook (engaging portion) 147 of the lid locking mechanism 140, and therefore, when the lid 20 is in the open position, it protrudes above the lock receiving portion (engaged portion) 149 that engages with the hook 147. This prevents the lower lip or chin from coming into contact with the lock receiving portion 149 when the user places their mouth (lips) over the spout 11 from the front to drink. The user can drink smoothly from the front of the cap unit 103, is less likely to feel uncomfortable during use, and is comfortable to use.

In addition, in this embodiment, the lid locking mechanism 140 is housed within the lid body 20 and does not protrude outside the cap unit 103, which allows for a more compact cap and improved design.

In addition, in this embodiment, the reduced pressure state of the container body 2 can be released by the pressure release mechanism 130. That is, the pressure release mechanism 130 releases the valve packing 131 from blocking the air vent 125, allowing air to be drawn in through the air vent 125, eliminating the pressure difference between the inside and outside of the container body 2 and making it easier to open the lid 20.

Furthermore, in this embodiment, the pressure release mechanism 130 releases the pressure inside the container body 2 while the lid locking mechanism 140 is unlocking the lid body 20. In other words, the unlocking operation of the lid locking mechanism 140 and the pressure release operation of the pressure release mechanism 130 are performed consecutively as a series of operations, resulting in excellent operability.

In the first and second embodiments described above, examples were given in which the present invention was applied to beverage containers 1, 101 that have a hot/cold insulation function due to a container body 2 with a vacuum insulation structure, but the present invention is not limited to this. In other words, the present invention can be widely applied to capped containers in which a cap unit is detachably attached to the mouth and neck portion of the container body.

The present invention may be modified by combining the various components described in the above embodiments and variations, and by adding, omitting, substituting, or otherwise modifying components, without departing from the spirit of the present invention. Furthermore, the present invention is not limited to the above embodiments, but is limited only by the claims.

1,101...beverage container, 2...container body, 2d...upper opening, 3,103...cap unit, 8...extension, 10...cap body, 11...drinking spout, 12...liquid passage, 20...lid body, 21,121...stopper portion, 30...first hinge (hinge), 40,140...lid locking mechanism, 47,147...hook portion (locking portion), 60,61,110...opening gasket, 70...watertight gasket, 80,130...pressure release mechanism

Claims (7)

A cap unit that can be detachably attached to a container body having an open top,
a cap body attached to an upper opening of the container body and having a liquid passage opening that connects the inside and outside of the container body;
a lid that covers the liquid passage port from above;
a hinge that rotatably connects the lid body to the cap body;
a waterproof packing that directly seals the gap between the lid and the container body;
a lid locking mechanism that fixes the lid body in a closed position relative to the cap body,
the lid locking mechanism has a locking portion that is locked with the lid body or the cap body,
The hinge is disposed at the rear of the cap unit,
The locking portion is disposed at the front of the cap unit,
the cap body has a drinking spout portion having substantially the same diameter as the upper opening, is disposed directly above the upper opening , and has the liquid passage hole formed therein;
The drinking spout portion extends in the vertical direction so as to be continuous with the upper opening, and a front portion of the drinking spout portion protrudes upward beyond the engaging portion.
Cap unit. The lid body has a plug portion that is inserted into the upper opening through the inside of the drinking spout portion,
The watertight gasket seals the gap between the plug portion and a protruding portion protruding from the inside of the container body.
The cap unit according to claim 1 . an opening packing that seals the gap between the cap body and the upper opening;
The cap unit according to claim 1 or 2. The lid has a pressure release mechanism,
The pressure release mechanism includes:
a vent hole penetrating the bottom wall of the plug portion in the vertical direction;
a valve packing that closes the vent hole in an openable and closable manner;
It is possible to block the communication of the vent hole, and then release the blockage to open the vent hole and release the pressure in the container body.
The cap unit according to claim 2 . The protruding portion is provided below the upper opening.
The cap unit according to claim 2 . A cap unit that can be detachably attached to a container body having an open top,
a cap body attached to an upper opening of the container body and having a liquid passage opening that connects the inside and outside of the container body;
a lid that covers the liquid passage port from above;
a hinge that rotatably connects the lid body to the cap body;
a waterproof packing that directly seals the gap between the lid and the container body;
a lid locking mechanism that fixes the lid body in a closed position relative to the cap body;
an opening packing that seals the gap between the cap body and the upper opening,
the lid locking mechanism has a locking portion that is locked with the lid body or the cap body,
The hinge is disposed at the rear of the cap unit,
The locking portion is disposed at the front of the cap unit,
the cap body has a drinking spout portion having substantially the same diameter as the upper opening, is disposed directly above the upper opening, and has the liquid passage hole formed therein;
The drinking spout portion extends in the vertical direction so as to be connected to the upper opening, and a front portion of the drinking spout portion protrudes above the locking portion,
The lid body has a plug portion that is inserted into the upper opening through the inside of the drinking spout portion,
The watertight gasket seals the gap between the plug portion and a protruding portion protruding from the inside of the container body.
Cap unit. The cap unit according to any one of claims 1 to 6 ,
the container body to which the cap unit is attached,
Beverage container.