JP7519809B2 - Discharge Cap - Google Patents

Description

The present invention relates to a discharge cap.

A dispensing container, such as that described in Patent Document 1, is known in the past. This dispensing container comprises a container body that contains the liquid content, and a dispensing cap (discharge cap) that is attached to the mouth of the container body. An inner plug is provided on the inside of the dispensing cap, and a spherical body (moving valve body) is provided in the cylindrical body of the inner plug. When the container body is squeezed and deformed, the liquid content is dispensed only while the spherical body moves inside the cylindrical body and seats on the tip of the annular wall. This makes it possible to dispense a substantially constant amount of the liquid content.

JP 2015-30488 A

This type of dispensing cap had room for improvement in terms of stably dispensing a specified amount of liquid content.

One of the objectives of the present invention is to provide an ejection cap that can stably eject a predetermined amount of liquid content.

One aspect of the discharge cap of the present invention comprises an inner stopper that is attached to an opening of a container body in which a content liquid is contained, a cover body that is arranged above the inner stopper, and a first hinge that connects the inner stopper and the cover body, wherein the cover body has an upper wall that covers the inner stopper from above, and a discharge hole that penetrates the upper wall, and the inner stopper has: a valve housing cylinder that is arranged below the upper wall and extends in the vertical direction, the valve being in communication with the discharge hole at its interior, a valve that is arranged inside the valve housing cylinder so as to be movable up and down, the valve blocking communication between the interior of the valve housing cylinder and the discharge hole at its upper end position , and a lower wall that extends radially outward from the valve housing cylinder and defines a flow chamber for the content liquid between it and the upper wall, and At least one of the valve accommodating tube and the upper wall has an opening that is arranged between the valve accommodating tube and the upper wall, connecting the inside and outside of the valve accommodating tube, and a guide wall portion that is arranged at a circumferential position different from the opening, extends circumferentially, and blocks the space between the valve accommodating tube and the upper wall , the lower wall has a first communicating hole that penetrates the lower wall, the valve accommodating tube is a bottomed tube having a peripheral wall and a bottom wall, and the valve accommodating tube has a tube hole that opens to a connection portion between the peripheral wall and the bottom wall, and a guide rib that is located below the lower wall, protrudes radially outward from the peripheral wall, extends in the vertical direction, and is located directly above the tube hole, and the upper end of the guide rib is connected to the first communicating hole .

To discharge the liquid contents of the container body using this discharge cap, for example, the container body is tilted so that the discharge hole faces downward. This causes the liquid contents to flow from the container body through the opening into the inside of the valve housing cylinder, and then from inside the valve housing cylinder through the discharge hole, the liquid contents are discharged. Specifically, the liquid contents flow into the upper and lower parts of the valve inside the valve housing cylinder, and as the liquid contents flow from inside the valve housing cylinder to the discharge hole, negative pressure acts on the valve, drawing the valve towards the discharge hole inside the valve housing cylinder. The valve moves towards the discharge hole and blocks the discharge hole at the upper end position, stopping the discharge of the liquid contents. This causes a predetermined amount of liquid contents to be discharged.

The discharge cap of the present invention is provided with an opening between the valve housing cylinder and the upper wall, and a guide wall portion extending circumferentially at a circumferential position different from the opening. Therefore, the guide wall portion provides a rectifying effect that guides the liquid contents to the opening, and can suppress (regulate) disturbances in the flow of the liquid contents from the outside to the inside of the valve housing cylinder, and from the inside to the discharge hole. This allows a stable negative pressure to be applied to the valve inside the valve housing cylinder, and even when the force that squeezes and deforms the container body is small or is not squeezed and deformed, the valve moves upward stably with each discharge operation, and a predetermined amount of liquid contents can be stably discharged.

In the above-mentioned discharge cap, the inner plug has a lower wall that extends radially outward from the valve accommodating tube and defines a flow chamber for the content liquid between it and the upper wall, the lower wall has a first communicating hole that penetrates the lower wall, the valve accommodating tube is a bottomed tube having a peripheral wall and a bottom wall, and the valve accommodating tube has a tube hole that opens at the connection between the peripheral wall and the bottom wall, and a guide rib that is located below the lower wall, protrudes radially outward from the peripheral wall, extends in the vertical direction, and is located directly above the tube hole, and the upper end of the guide rib is connected to the first communicating hole.

In this case, after the liquid contents are discharged, the remaining liquid that has accumulated in the flow chamber flows downward from the first communication hole along the guide rib, and this liquid acts through the tube hole to draw out the remaining liquid remaining in the valve housing tube. This allows the remaining liquid in the valve housing tube to be stably returned to the container body, and the valve in the valve housing tube is stably returned to its original standby position (initial position) before the discharge operation. This allows the specified amount of liquid contents to be stably discharged even during the next discharge operation.

The above-mentioned discharge cap comprises a lid body that covers the cover body from above, and a second hinge that connects the cover body and the lid body on the opposite side to the first hinge that radially sandwiches a cap axis , and the lower wall has a first communication hole that penetrates the lower wall and is located between the valve accommodating cylinder and the second hinge when viewed from the vertical direction, and a second communication hole that penetrates the lower wall and is located between the valve accommodating cylinder and the first hinge when viewed from the vertical direction, and it is preferable that the opening area of the first communication hole is greater than or equal to the opening area of the discharge hole, and the opening area of the second communication hole is less than or equal to the opening area of the discharge hole.

In this case, the discharge cap has a first discharge configuration in which a predetermined amount of liquid contents is discharged from the discharge hole when the cover body is open around the second hinge, and a second discharge configuration in which an amount of liquid contents desired by the user is discharged from the first communication hole when the cover body is open around the first hinge.

In the first discharge mode, by tilting the container body so that the second hinge is on the upper side, the liquid contents of the container body flow from the first and second communication holes through the opening to the discharge hole. At this time, since the opening area (flow path cross-sectional area) of the second communication hole is equal to or smaller than the opening area of the discharge hole, the liquid contents are prevented from flowing in large quantities into the space (flow chamber) between the lower and upper walls, and the liquid contents are prevented from spraying out of the discharge hole due to the water hammer phenomenon.

In the second discharge mode, the container body is tilted so that the first hinge is on the upper side, and the liquid contents are discharged through the first communication hole, which has a large opening area, allowing efficient discharge.

In the above discharge cap, it is preferable that the guide wall portion extends circumferentially over at least half the circumference of the valve housing cylinder.

In this case, the guide wall portion provides a more stable flow rectifying effect that guides the liquid contents to the opening. This allows the valve to move upward steadily with each ejection operation, ensuring a stable ejection of a predetermined amount of liquid contents.

The discharge cap of one embodiment of the present invention allows a predetermined amount of liquid content to be stably discharged.

FIG. 1 is a vertical cross-sectional view showing a discharge cap according to the present embodiment. FIG. 2 is a top view showing the discharge cap of this embodiment, illustrating a state in which the cover body is open, and the illustration of the valve is omitted. FIG. 3 is a vertical cross-sectional view showing the discharge cap of this embodiment, illustrating the state immediately after the content liquid is discharged.

Hereinafter, a discharge cap 10 according to an embodiment of the present invention will be described with reference to the drawings.
As shown in Fig. 1, the discharge cap 10 of this embodiment is attached to the mouth 51 of the container body 50. The discharge cap 10 may be attached to the mouth 51 in a detachable manner or in a non-detachable manner. The container body 50 is a cylindrical shape with a bottom, contains a liquid content therein, and is deformable by squeezing. The container body 50 may not be deformable by squeezing.

The discharge cap 10 comprises an inner plug 1 attached to the mouth 51, a cover body 2, a first hinge 3 connecting the inner plug 1 and the cover body 2, a lid body 4, and a second hinge 5 connecting the cover body 2 and the lid body 4. Note that FIG. 1 shows the lid body 4 in an open state. Although not specifically shown, when the lid body 4 is closed, the mouth 51, the inner plug 1, the cover body 2, and the lid body 4 are arranged coaxially with each other, with the cap axis O as a common axis.

In this embodiment, the direction in which the cap axis O extends, i.e., the direction parallel to the cap axis O, is referred to as the up-down direction. The up-down direction may also be referred to as the axial direction. The lid 4 and the mouth 51 in the closed state are disposed at different positions in the up-down direction. In the up-down direction, the direction from the mouth 51 to the lid 4 is referred to as the upper side, and the direction from the lid 4 to the mouth 51 is referred to as the lower side.
In a plan view seen from the top-bottom direction, a direction perpendicular to the cap axis O is called the radial direction. In the radial direction, a direction approaching the cap axis O is called the radial inner side, and a direction away from the cap axis O is called the radial outer side. The second hinge 5 is disposed on the opposite side of the first hinge 3, which sandwiches the cap axis O in the radial direction. In this embodiment, in the radial direction, a predetermined direction passing through the first hinge 3 and the second hinge 5 is called the front-rear direction. In the front-rear direction, a direction from the second hinge 5 to the first hinge 3 is called the front side, and a direction from the first hinge 3 to the second hinge 5 is called the rear side.
The direction going around the cap axis O is called the circumferential direction.

The plug 1 has an outer tube 11 , an inner tube 12 , a connecting flange 13 , a valve accommodating tube 14 , a valve 15 , and a bottom wall 16 .
The outer tube 11 is tubular and extends vertically, and fits radially outward of the mouth portion 51. The outer tube 11 has a lower protrusion 11a that protrudes radially inward from the lower end of the inner peripheral surface of the outer tube 11, and an upper protrusion 11b that protrudes radially outward from the upper end of the outer peripheral surface of the outer tube 11. The lower protrusion 11a comes into contact with the mouth portion protrusion 51a that protrudes radially outward from the outer peripheral surface of the mouth portion 51, from below. This allows the outer tube 11 to be fitted into the mouth portion 51 via an undercut. In other words, the inside plug 1 is attached to the mouth portion 51 via an undercut fit.

The inner tube 12 is tubular and extends in the vertical direction, and fits into the radially inner side of the mouth portion 51. The connecting flange 13 is a circular ring plate centered on the cap axis O, and connects the outer tube 11 and the inner tube 12. A pair of plate surfaces of the connecting flange 13 face in the vertical direction. The lower surface of the pair of plate surfaces of the connecting flange 13 contacts the upper opening edge of the mouth portion 51 from above. Specifically, the connecting flange 13 connects an intermediate portion located between the upper and lower ends of the inner peripheral surface of the outer tube 11 and an intermediate portion located between the upper and lower ends of the outer peripheral surface of the inner tube 12.
In the illustrated example, the thickness of an upper portion of the inner tube 12 located above the connecting flange 13 is thinner than the thickness of a lower portion of the inner tube 12 located below the connecting flange 13. In addition, of the upper portion of the inner tube 12, the upper edge of the front portion is located lower than the upper edge of the rear portion.

The valve housing cylinder 14 is positioned radially inward and spaced apart from the inner cylinder 12. The valve housing cylinder 14 extends vertically around the cap axis O. The valve housing cylinder 14 is a bottomed cylinder having a peripheral wall 14a and a bottom wall 14b. The peripheral wall 14a is cylindrical and extends vertically, and the bottom wall 14b is plate-shaped and extends in a direction perpendicular to the cap axis O.

The valve housing cylinder 14 also has a retaining projection 14c, an opening 17, a guide wall portion 18, a cylinder hole 14d, and a guide rib 14e.
The retaining projection 14c projects radially inward from the upper end of the inner peripheral surface of the peripheral wall 14a. The retaining projection 14c is in the form of a rib extending in the circumferential direction, and in the illustrated example, is in the form of an annular shape centered on the cap axis O.

The opening 17 is located at the upper end of the peripheral wall 14a and connects the inside and outside of the valve housing cylinder 14. The opening 17 is formed by cutting out a portion of the circumferential edge of the upper end opening of the peripheral wall 14a. The opening 17 is located in the rear portion of the upper end of the peripheral wall 14a. The opening 17 is located above the retaining protrusion 14c and extends in the circumferential direction.

The guide wall portion 18 is located at the upper end of the peripheral wall 14a and separates the inside and outside of the valve housing cylinder 14. The guide wall portion 18 is located at the front portion of the upper end of the peripheral wall 14a. The guide wall portion 18 is located at a different circumferential position from the opening 17. The guide wall portion 18 is located above the retaining protrusion 14c and extends in the circumferential direction.

As shown in FIG. 2, the guide wall portion 18 extends in the circumferential direction over at least half the circumference of the valve housing cylinder 14. Specifically, as shown in FIG. 2, when viewed from the top-bottom direction, the guide wall portion 18 is disposed at the upper end of the peripheral wall 14a over a central angle range of 180° to 315° centered on the cap axis O. In the illustrated example, the guide wall portion 18 extends over approximately half the circumference.

As shown in FIG. 1, the bore 14d is located at the lower end of the valve housing cylinder 14. The bore 14d is located in the rear portion of the valve housing cylinder 14. The bore 14d opens at the connection between the peripheral wall 14a and the bottom wall 14b.

The guide rib 14e protrudes radially outward from the peripheral wall 14a and extends in the vertical direction. The guide rib 14e is located on the rear portion of the peripheral wall 14a. In other words, the guide rib 14e protrudes rearward from the outer circumferential surface of the peripheral wall 14a. The guide rib 14e is located on the lower portion of the peripheral wall 14a. The radial height of the guide rib 14e, i.e., the protruding height from the peripheral wall 14a, is constant along the vertical direction except for the lower end of the guide rib 14e, and at the lower end, it becomes smaller toward the lower side. The guide rib 14e is located directly above the cylindrical hole 14d. The lower end of the guide rib 14e is connected to or close to the cylindrical hole 14d.

The valve 15 is disposed in the valve housing cylinder 14 so as to be movable up and down. The valve 15 is in the form of a cylinder with a bottom, and has a valve peripheral wall 15a and a valve bottom wall 15b.
The valve peripheral wall 15a is cylindrical and extends in the vertical direction. The outer circumferential surface of the valve peripheral wall 15a is in slidable contact with the inner circumferential surface of the peripheral wall 14a or faces the inner circumferential surface of the peripheral wall 14a with a gap therebetween. The outer diameter of the lower portion of the valve peripheral wall 15a is larger than the outer diameter of the upper portion. The outer diameter of the upper portion of the valve peripheral wall 15a decreases toward the top.
The valve bottom wall 15b is in the shape of a plate extending in a direction perpendicular to the cap axis O. The lower surface of the valve bottom wall 15b is in separable contact with the upper surface of the bottom wall 14b.

The lower wall 16 extends radially outward from the valve housing cylinder 14. The lower wall 16 is annular plate-shaped with the cap axis O at its center, and a pair of plate surfaces face in the vertical direction. The lower wall 16 is positioned higher as it moves radially outward. The inner peripheral portion of the lower wall 16 is connected to an intermediate portion of the outer peripheral surface of the peripheral wall 14a that is positioned between the upper and lower ends in the vertical direction. The outer peripheral portion of the lower wall 16 is connected to the lower end of the inner cylinder 12. The guide rib 14e is positioned below the lower wall 16. The upper end of the guide rib 14e is connected to the lower surface of the lower wall 16.

As shown in Figures 1 and 2, the rear end 16a of the lower wall 16, which is located rearward of the valve housing cylinder 14, is located lower than the rest of the wall. A step 16d is formed between the rear end 16a of the lower wall 16 and the rest of the wall. The step 16d has a surface facing rearward and extends in the left-right direction perpendicular to the front-rear direction when viewed from the top-bottom direction.

The lower wall 16 has a first communication hole 16b and a second communication hole 16c.
The first communication hole 16b penetrates the lower wall 16 in the up-down direction. The first communication hole 16b is disposed at the rear end portion 16a of the lower wall 16. The first communication hole 16b is located on the rear side of the valve housing cylinder 14. As shown in FIG. 2, in this embodiment, the first communication hole 16b is a hole that extends in an arc shape along the circumferential direction. When the cover body 2 is in a closed state (see FIG. 1), the first communication hole 16b is located between the valve housing cylinder 14 and the second hinge 5 when viewed from the up-down direction. In addition, the upper end portion of the guide rib 14e is connected to or adjacent to the first communication hole 16b.

The second communication hole 16c penetrates the lower wall 16 in the up-down direction. The second communication hole 16c is disposed in a portion of the lower wall 16 other than the rear end portion 16a. The second communication hole 16c is located on the front side of the valve housing cylinder 14. In this embodiment, the second communication hole 16c is a circular hole. The second communication hole 16c is located between the valve housing cylinder 14 and the first hinge 3 when viewed in the up-down direction.
The opening area (flow path cross-sectional area) of the first communication hole 16b is larger than the opening area of the second communication hole 16c.

As shown in FIG. 1, the cover body 2 is disposed above the plug 1. The cover body 2 has a cover tube 21, an upper wall 22 that covers the plug 1 from above, a nozzle 23 that protrudes upward from the upper wall 22, a discharge hole 24 that passes through the nozzle 23 in the vertical direction and through the upper wall 22, and a seal tube 25 that is suspended downward from the upper wall 22.

The cover tube 21 extends vertically around the cap axis O. The cover tube 21 is located above the outer tube 11. The lower end of the cover tube 21 fits radially outward of the upper end of the outer tube 11. The cover tube 21 is removably attached to the outer tube 11. The cover tube 21 is connected to the outer tube 11 via the first hinge 3. The cover tube 21 is connected to the lid peripheral wall 4a of the lid body 4 (described later) via the second hinge 5.

The cover tube 21 has an inner peripheral protrusion 21a, an inner peripheral rib 21b, and an outer peripheral protrusion 21c.
The inner peripheral protrusion 21a protrudes radially inward from the lower end of the inner peripheral surface of the cover tube 21. The inner peripheral protrusion 21a contacts the upper protrusion 11b of the outer tube 11 from below. As a result, the cover tube 21 is fitted into the outer tube 11 by an undercut.

The inner circumferential rib 21b protrudes radially inward from the inner circumferential surface of the cover tube 21 and extends in the up-down direction. The inner circumferential rib 21b is disposed above and away from the inner circumferential protrusion 21a. A plurality of the inner circumferential ribs 21b are provided at intervals from each other in the circumferential direction. The lower end of the inner circumferential rib 21b contacts the upper opening edge of the outer tube 11 from above.
The outer peripheral protrusion 21 c protrudes radially outward from the upper end of the outer peripheral surface of the cover tube 21 .

The upper wall 22 extends radially inward from the inner circumferential surface of the cover cylinder 21. The upper wall 22 is plate-shaped and centered on the cap axis O, with a pair of plate surfaces facing in the vertical direction. The upper wall 22 covers the inner cylinder 12, the lower wall 16, the valve housing cylinder 14, and the valve 15 from above. In other words, the inner cylinder 12, the lower wall 16, the valve housing cylinder 14, and the valve 15 are disposed below the upper wall 22.
In this embodiment, the outer periphery of the upper wall 22 is located above the remaining portion. The outer periphery of the upper wall 22 overlaps with the inner tube 12 when viewed from the top-bottom direction. In the illustrated example, the thickness of the remaining portion of the upper wall 22 is thicker than the thickness of the outer periphery of the upper wall 22.

The upper wall 22 has a bulging portion 22a that bulges downward from the lower surface of the upper wall 22. The bulging portion 22a has a circular shape centered on the cap axis O when viewed from below. When the cover body 2 is closed as shown in Figure 1, the upper end surface of the guide wall portion 18 contacts the lower surface of the upper wall 22 from below, and the upper end inner peripheral edge of the guide wall portion 18 contacts the outer peripheral edge of the bulging portion 22a along the circumferential direction. The guide wall portion 18 seals the gap between the valve housing cylinder 14 and the upper wall 22.
The opening 17 is disposed between the valve housing cylinder 14 and the upper wall 22. The opening 17 is provided between the upper end of the peripheral wall 14a and the lower surface of the upper wall 22, and connects the inside of the valve housing cylinder 14 to the outside.

The nozzle 23 protrudes from the upper surface of the upper wall 22. The nozzle 23 extends in the vertical direction around the cap axis O. In the illustrated example, the upper end of the nozzle 23 is lip-shaped and extends radially outward.

The discharge hole 24 extends vertically around the cap axis O and opens to the upper end of the nozzle 23 and the lower surface of the upper wall 22. Specifically, the lower end of the discharge hole 24 opens to the lower surface of the bulge portion 22a. In the illustrated example, the inner diameter of the lower end of the discharge hole 24 is smaller than the inner diameter of the portion other than the lower end.

The interior of the valve housing cylinder 14 communicates with the discharge hole 24. When the valve 15 reaches the uppermost raised position inside the valve housing cylinder 14, it comes into contact with the upper wall 22 from below. Specifically, the upper end opening edge of the valve peripheral wall 15a comes into contact with the lower surface of the bulging portion 22a from below over the entire circumferential direction. When the valve 15 reaches the uppermost raised position, it blocks communication between the interior of the valve housing cylinder 14 and the discharge hole 24.
The opening area of the first communication hole 16b is equal to or larger than the opening area of the discharge hole 24, and the opening area of the second communication hole 16c is equal to or smaller than the opening area of the discharge hole 24. In this embodiment, the opening area of the discharge hole 24 corresponds to the flow path cross-sectional area of the lower end of the discharge hole 24, for example.

The sealing tube 25 protrudes downward from the boundary between the outer periphery and the remaining portion of the upper wall 22 on the underside of the upper wall 22. The sealing tube 25 extends in the vertical direction about the cap axis O. The sealing tube 25 fits into the radially inner side of the inner tube 12. In the illustrated example, the thickness of the sealing tube 25 becomes thinner toward the bottom. The lower end of the front portion of the sealing tube 25 is located lower than the lower end of the rear portion.
The seal cylinder 25 has a seal protrusion 25a that protrudes radially outward from the outer circumferential surface of the seal cylinder 25 and contacts the inner circumferential surface of the inner cylinder 12 over the entire circumference in the circumferential direction.

The lower wall 16 defines a flow chamber 26 for the liquid contents between it and the upper wall 22 in the vertical direction. Specifically, the space partitioned by the lower wall 16, the upper wall 22, the inner tube 12, the sealing tube 25, and the peripheral wall 14a is the flow chamber 26. In other words, the discharge cap 10 has a flow chamber 26. The liquid contents flow and are temporarily stored in the flow chamber 26.

Although not particularly shown, when the lid body 4 is closed, the lid body 4 covers the cover body 2 from above. The lid body 4 is attached to the cover body 2 in a detachable manner.
The lid body 4 is a cylindrical shape with a top, and includes a lid peripheral wall 4a and a lid top wall 4b. The lid body 4 also includes a lid protrusion 4c. The lid protrusion 4c protrudes radially inward from the lower end of the inner circumferential surface of the lid peripheral wall 4a. When the lid body 4 is closed, the lid protrusion 4c contacts the outer circumferential protrusion 21c of the cover tube 21 from below. This allows the lid body 4 to be fitted into the cover tube 21 via an undercut.

Next, the operation of discharging the liquid contained in the container body 50 using the discharge cap 10 of this embodiment will be described.
The discharge cap 10 has a first discharge configuration in which a predetermined amount of content liquid is discharged from the discharge hole 24 with the cover body 4 open around the second hinge 5 as shown in FIG. 1, and a second discharge configuration in which a user-desired amount of content liquid is discharged from the first communication hole 16b with the cover body 2 open around the first hinge 3 as shown in FIG. 2.

In the first discharge form shown in FIG. 1, in order to discharge the liquid contents of the container body 50 by the discharge cap 10, the container body 50 is tilted so that, for example, the discharge hole 24 faces downward and the second hinge 5 is on the upper side. As a result, the liquid contents flow from the container body 50 through the flow chamber 26 and the opening 17 into the inside of the valve housing cylinder 14, and the liquid contents are discharged from the inside of the valve housing cylinder 14 through the discharge hole 24. Specifically, the liquid contents flow into the upper and lower parts of the valve 15 in the valve housing cylinder 14, and the liquid contents flow from the inside of the valve housing cylinder 14 to the discharge hole 24, which applies negative pressure to the valve 15, and the valve 15 is drawn to the discharge hole 24 side within the valve housing cylinder 14. The valve 15 moves toward the discharge hole 24 and closes the discharge hole 24 at the upper end position, stopping the discharge of the liquid contents. This causes a predetermined amount of liquid contents to be discharged.

In the second discharge mode shown in FIG. 2, the container body 50 is tilted so that the first hinge 3 is on the upper side, and the user discharges the desired amount of liquid contents through the first communication hole 16b. At this time, the second communication hole 16c functions as an air replacement hole that allows air to flow into the container body 50 from outside the container.

As shown in FIG. 1, the discharge cap 10 of the present embodiment described above has an opening 17 and a guide wall portion 18 extending circumferentially at a circumferential position different from the opening 17 between the valve housing cylinder 14 and the upper wall 22. Therefore, the guide wall portion 18 provides a rectifying effect that guides the content liquid to the opening 17, and suppresses (regulates) disturbances in the flow of the content liquid from the outside to the inside of the valve housing cylinder 14 and from the inside to the discharge hole 24. This allows a stable negative pressure to be applied to the valve 15 in the valve housing cylinder 14, and even when the force that squeezes and deforms the container body 50 is small or is not squeezed and deformed, the valve 15 moves upward stably with each discharge operation, and a predetermined amount of content liquid can be stably discharged.

In this embodiment, the upper end of the guide rib 14e is connected to or adjacent to the first communication hole 16b, and the lower end of the guide rib 14e is connected to or adjacent to the cylindrical hole 14d.
In this case, as shown in Fig. 3, after the content liquid is discharged, when the remaining liquid accumulated in the flow chamber 26 flows downward from the first communication hole 16b along the guide rib 14e, this liquid acts to draw out the remaining liquid remaining in the valve housing cylinder 14 through the cylinder hole 14d. Therefore, the remaining liquid in the valve housing cylinder 14 can be stably returned to the container body 50, and the valve 15 in the valve housing cylinder 14 is stably returned to the original standby position (initial position) before the discharge operation shown in Fig. 1. As a result, a predetermined amount of content liquid can be stably discharged even during the next discharge operation.

In addition, in this embodiment, the rear end 16a of the bottom wall 16 is located lower than the rest of the wall, and the first communication hole 16b with a large opening area is opened at the rear end 16a. Therefore, after the discharge operation, the remaining liquid is steadily returned from the flow chamber 26 to the container body 50 through the first communication hole 16b, preventing liquid from remaining in the flow chamber 26.

In this embodiment, the opening area of the first communication hole 16 b is equal to or larger than the opening area of the discharge hole 24 , and the opening area of the second communication hole 16 c is equal to or smaller than the opening area of the discharge hole 24 .
In the first discharge mode, by tilting the container body 50 so that the second hinge 5 is on the upper side, the liquid content of the container body 50 flows from the first communication hole 16b and the second communication hole 16c through the opening 17 to the discharge hole 24. At this time, since the opening area (flow path cross-sectional area) of the second communication hole 16c is equal to or smaller than the opening area of the discharge hole 24, a large amount of the liquid content is prevented from flowing into the flow chamber 26, and the liquid content is prevented from spraying out of the discharge hole 24 due to the water hammer phenomenon.
In the second discharge mode, efficient discharge can be achieved by tilting the container body 50 so that the first hinge 3 is on the upper side and discharging the content liquid through the first communication hole 16b, which has a larger opening area.

In this embodiment, the guide wall portion 18 extends over at least half the circumference of the valve housing cylinder 14 in the circumferential direction.
In this case, the guide wall portion 18 provides a more stable flow rectifying effect for guiding the liquid contents to the opening 17. This allows the valve 15 to stably move upward with each ejection operation, enabling a predetermined amount of liquid contents to be ejected stably.

In this embodiment, as shown in FIG. 2, the guide wall portion 18 is disposed over a central angle range of 180° to 315° about the cap axis O when viewed from the top-bottom direction.
By setting the central angle to 180° or more, the flow regulation effect of the guide wall portion 18 in guiding the content liquid to the opening 17 is more stable.
By setting the central angle to 315° or less, the opening area of the opening 17 is prevented from becoming too small. Therefore, the amount of discharge per unit time is prevented from becoming too small, that is, a predetermined amount of content liquid can be stably discharged while maintaining good discharge operability.

The present invention is not limited to the above-described embodiment, and the configuration may be modified without departing from the spirit of the present invention, for example as described below.

In the above embodiment, the valve housing cylinder 14 has been described as having the guide wall portion 18 and the opening 17, but the present invention is not limited to this. Although not particularly shown, the guide wall portion 18 may be provided so as to protrude downward from the lower surface of the upper wall 22 and extend in the circumferential direction. In this case, the lower end surface of the guide wall portion 18 contacts the upper end opening edge of the peripheral wall 14a from above, thereby closing the gap between the valve housing cylinder 14 and the upper wall 22. The opening 17 is disposed at a position different from the guide wall portion 18 in the circumferential direction and constitutes a part of the upper wall 22.
In addition, the guide wall portion 18 and the opening portion 17 may be provided in the valve housing cylinder 14 and the upper wall 22, respectively.
That is, in the present invention, at least one of the valve housing cylinder 14 and the upper wall 22 has the opening 17 and the guide wall portion 18 .

In the above embodiment, an example was given in which the inner plug 1 is attached to the mouth portion 51 by undercut fitting, but this is not limited to this. The inner plug 1 may also be attached to the mouth portion 51 by, for example, screwing.

In addition, the components in the above-described embodiments may be replaced with well-known components as appropriate without departing from the spirit of the present invention, and the above-described embodiments and variations may be combined as appropriate.

1... inner plug, 2... cover body, 3... first hinge, 4... lid body, 5... second hinge, 10... discharge cap, 14... valve housing cylinder, 14a... peripheral wall, 14b... bottom wall, 14d... cylinder hole, 14e... guide rib, 15... valve, 16... lower wall, 16b... first communication hole, 16c... second communication hole, 17... opening, 18... guide wall portion, 22... upper wall, 24... discharge hole, 26... flow chamber, 50... container body, 51... mouth, O... cap shaft

Claims (3)

An inner plug that is attached to the mouth of a container body in which the content liquid is contained;
A cover body disposed on the upper side of the inside plug;
a first hinge connecting the inside plug and the cover body,
The cover body is
An upper wall that covers the inside plug from above;
a discharge hole penetrating the upper wall,
The inner plug is
a valve receiving cylinder disposed below the upper wall, extending in a vertical direction, the interior of which communicates with the discharge hole;
a valve that is arranged inside the valve housing cylinder so as to be movable up and down and that, when in an uppermost position, blocks communication between the inside of the valve housing cylinder and the discharge hole ;
a lower wall extending radially outward from the valve housing cylinder and defining a flow chamber for the content liquid between the lower wall and the upper wall,
At least one of the valve housing cylinder and the upper wall is
an opening portion disposed between the valve housing cylinder and the upper wall, the opening portion communicating the inside and the outside of the valve housing cylinder;
a guide wall portion that is disposed at a circumferential position different from the opening, extends in a circumferential direction, and closes a gap between the valve housing cylinder and the upper wall ,
the lower wall has a first communication hole penetrating the lower wall,
The valve housing cylinder is a cylinder having a bottom and a peripheral wall,
The valve housing cylinder is
a cylindrical hole that opens at a connection portion between the peripheral wall and the bottom wall;
a guide rib located below the lower wall, protruding radially outward from the peripheral wall, extending in the up-down direction, and located directly above the cylindrical hole;
The guide rib has an upper end portion connected to the first communication hole.
Discharge cap. A lid body that covers the cover body from above;
a second hinge connecting the cover body and the lid body on a side opposite to the first hinge that radially sandwiches a cap shaft ,
The lower wall is
the first communication hole penetrating the lower wall and positioned between the valve housing cylinder and the second hinge as viewed in the up-down direction;
a second communication hole penetrating the lower wall and positioned between the valve housing cylinder and the first hinge as viewed in the up-down direction,
an opening area of the first communication hole is equal to or larger than an opening area of the discharge hole,
The opening area of the second communication hole is equal to or smaller than the opening area of the discharge hole.
The dispensing cap of claim 1 . The guide wall portion extends over at least half of the circumference of the valve housing cylinder in the circumferential direction.
The discharge cap according to claim 1 or 2 .

Images