Dispenser

Abstract

To provide a discharger which has a structure capable of stabilizing a discharge amount of contents.SOLUTION: A discharger (30) comprises: a movable part (34) arranged between a first cylinder part (31) and a second cylinder part (32); and a columnar part (39) inserted into the movable part. The movable part (34) has a pressure accumulation valve part (36c) capable of opening and closing a part between the inside of the second cylinder part and a discharge hole (35h). The pressure accumulation valve part is provided with a communication hole part (36d) communicating the inside of the movable part and the discharge hole. The movable part is provided with an annular seal projection part (36k) coming into contact with an outer peripheral surface of the columnar part (39). The columnar part is provided with a recessed part (39e) located below the seal projection part. A portion located below a first piston part in the first cylinder part and the discharge hole communicate with each other through a gap between an inner peripheral surface of the movable part and an outer peripheral surface of the columnar part and the communication hole part while the seal projection part faces the recessed part in a radial direction.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dispenser. [Background technology]

[0002] There is known a pressure-accumulating dispenser in which the contents are dispensed from a discharge hole by moving the head portion downward. In such dispensers, the pressure in the cylinder portion into which the contents flow remains high even after the head portion is pushed down to the bottom end position to dispense the contents, and the contents cannot sufficiently flow into the cylinder portion. In response to this problem, for example, Patent Document 1 describes a structure in which a through hole is provided that connects the inside and outside of the cylinder portion when the head portion is pushed down to the bottom end position, thereby releasing the pressure in the cylinder portion. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 60-32505 Summary of the Invention [Problem to be solved by the invention]

[0004] In the dispenser described above, a portion of the contents in the cylinder portion is discharged to the outside of the cylinder portion through the through-hole, such as immediately before the head portion is pressed down to the bottom end position. The contents discharged through the through-hole are returned to the inside of the container body to which the dispenser is attached. The amount of contents returned to the container body through the through-hole varies depending on the speed at which the head portion is pressed down. Specifically, when the head portion is pressed down relatively quickly, the speed at which pressure is generated inside the cylinder portion increases, and a relatively large amount of contents is returned to the inside of the container body through the through-hole. On the other hand, when the head portion is pressed down relatively slowly, the speed at which pressure is generated inside the cylinder portion decreases, and a relatively small amount of contents is returned to the inside of the container body through the through-hole. Therefore, the amount of contents sent from the cylinder portion to the discharge hole varies depending on the speed at which the head portion is pressed down, resulting in an unstable amount of content discharge.

[0005] In view of the above circumstances, one aspect of the present invention aims to provide a dispenser having a structure that can stabilize the amount of content dispensed. [Means for solving the problem]

[0006] One aspect of the dispenser of the present invention is a dispenser that is attached to the opening of a container body that contains contents, and includes: a first cylinder portion whose interior is connected to the interior of the container body; a second cylinder portion that is arranged above the first cylinder portion and is movable downward in an upwardly biased state; a cylindrical movable portion that is arranged between the first cylinder portion and the second cylinder portion in the vertical direction and is movable downward in an upwardly biased state and opens downward; a columnar portion inserted into the movable portion from below; and a head portion that has a discharge hole that is connected to the interior of the second cylinder portion, wherein the movable portion has a first piston portion that is arranged slidably in the vertical direction within the first cylinder portion, a second piston portion that is slidably arranged in the vertical direction within the second cylinder portion, a communicating flow path portion that connects the interior of the first cylinder portion and the interior of the second cylinder portion, and a pressure accumulator valve portion that can open and close between the interior of the second cylinder portion and the discharge hole, and the first cylinder portion has a front a check valve portion that allows the contents to flow from the inside of the container body to the inside of the first cylinder portion and blocks the flow of the contents from the inside of the first cylinder portion to the inside of the container body; the pressure accumulator valve portion is provided with a communication hole portion that communicates the inside of the movable portion with the discharge hole; the movable portion is provided with an annular sealing protrusion that protrudes radially inward from the inner peripheral surface of the movable portion and contacts the outer peripheral surface of the columnar portion; the columnar portion is provided with a recess that is recessed radially inward from the outer peripheral surface of the columnar portion and is located below the sealing protrusion; the movable portion is movable to a position where the sealing protrusion and the recess are radially opposed; when the sealing protrusion is radially opposed to the recess, a portion of the inside of the first cylinder portion that is located below the first piston portion is communicated with the discharge hole via a gap between the inner peripheral surface of the movable portion and the outer peripheral surface of the columnar portion and the communication hole portion; and the inner diameter of the communication hole portion is the inner diameter of the movable portion is smaller than the inner diameter of a portion of the movable portion that is located above the seal protrusion and below the pressure accumulator valve portion, and The outer diameter is smaller than the outer diameter of the portion of the columnar portion located above the recess.

[0007] According to one aspect of the dispenser of the present invention, the accumulator valve section is provided with a communication hole section that communicates the interior of the movable section with the discharge hole. The movable section is provided with an annular sealing protrusion section that protrudes radially inward from the inner peripheral surface of the movable section and contacts the outer peripheral surface of the columnar section. The columnar section is provided with a recess section that is recessed radially inward from the outer peripheral surface of the columnar section and is located below the sealing protrusion section. The movable section is movable to a position where the sealing protrusion section and the recess section face each other in the radial direction. When the sealing protrusion section faces the recess section in the radial direction, a portion of the interior of the first cylinder section that is located below the first piston section is communicated with the discharge hole through a gap between the inner peripheral surface of the movable section and the outer peripheral surface of the columnar section, and through the communication hole section. Therefore, when the sealing protrusion section faces the recess section in the radial direction, pressure within the first cylinder section can be released from the discharge hole to the outside of the dispenser. As a result, at least a portion of the contents remaining in a pressurized state in the portion of the first cylinder below the first piston is discharged from the discharge hole to the outside of the dispenser through the gap between the inner circumferential surface of the movable portion and the outer circumferential surface of the columnar portion and the communicating hole. Therefore, a portion of the contents drawn into the first cylinder from the container body is not returned to the container body. In other words, according to one aspect of the dispenser of the present invention, it is possible to prevent the contents flowing into the first cylinder from returning to the container body. Furthermore, since the contents discharged from the first cylinder can be discharged from the discharge hole as the pressure in the first cylinder is released, it is possible to prevent changes in the amount of contents discharged from the discharge hole even if the rate at which the pressure in the first cylinder changes depending on the speed at which the head is pressed down. Therefore, according to one aspect of the dispenser of the present invention, a dispenser having a structure capable of stabilizing the amount of contents discharged can be obtained. Furthermore, since a portion of the contents drawn into the first cylinder from the container body is not returned to the container body, it is possible to prevent a decrease in the amount of contents discharged from the discharge hole, i.e., the amount of contents discharged.

[0008] The recess may be configured to face the seal protrusion in the radial direction when the head is pressed down to the lower end position. With this configuration, when the head is pushed down to the lowest position, the pressure inside the first cylinder can be released through the discharge hole. This allows the pressurized state inside the first cylinder to be more efficiently released. This allows the air compressed inside the first cylinder to be efficiently discharged through the discharge hole when priming, reducing the number of times priming is performed. [Effects of the Invention]

[0009] According to one aspect of the present invention, there is provided a dispenser having a structure capable of stabilizing the amount of content dispensed. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 2 is a cross-sectional view showing the dispenser of the first embodiment, illustrating the dispenser in a state where the head portion is not pressed down. [Figure 2] FIG. 2 is a cross-sectional view showing the dispenser of the first embodiment, illustrating the dispenser in a state where the head portion is being pressed down. [Figure 3] FIG. 2 is a cross-sectional view showing the dispenser of the first embodiment, illustrating the dispenser in a state where a head portion is pushed down to a lower end position. [Figure 4] 4 is a cross-sectional view showing a part of the dispenser of the first embodiment, and is a partially enlarged view of FIG. 3. FIG. [Figure 5] FIG. 10 is a cross-sectional view showing a dispenser of a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a dispenser according to an embodiment of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiments, and can be modified as desired within the scope of the technical concept of the present invention. In addition, in the following drawings, the scale and number of each structure may differ from the scale and number of the actual structure in order to make each configuration easier to understand.

[0012] First Embodiment 1 to 3, the dispenser 30 of this embodiment is a dispenser that is attached to the mouth 21 of the container body 20 that contains the content C. By attaching the dispenser 30 to the mouth 21, a dispensing container 10 that includes the container body 20 and the dispenser 30 is configured. The content C that is contained in the container body 20 is not particularly limited, but is, for example, a liquid such as a medicine, a cosmetic, or a fragrance.

[0013] In this embodiment, the central axes of the container body 20 and the dispenser 30 are aligned on a common axis. Hereinafter, this common axis will be referred to as the container axis O of the container body 20, and the container axial direction along the container axis O will be referred to as the vertical direction. Furthermore, the bottom side (-Z side) of the container body 20 along the vertical direction will be referred to as the downward direction, and the mouth 21 side (+Z side) will be referred to as the upward direction. In a plan view seen from the vertical direction, the direction intersecting the container axis O will be referred to as the radial direction.

[0014] As shown in FIG. 1, the dispenser 30 includes a mounting tube portion 33, a first cylinder portion 31, a columnar portion 39, a second cylinder portion 32, a head portion 35, a movable portion 34, and a biasing member 38. The mounting cylinder 33 is mounted to the opening 21 of the container body 20. The mounting cylinder 33 has an annular plate portion 33a, a mounting cylinder body 33b, a guide cylinder portion 33c, and an outer cylinder portion 33d. The annular plate portion 33a is in the shape of an annular plate that is arranged coaxially with the container axis O.

[0015] The mounting tube body 33b extends downward from the radial outer edge of the annular plate portion 33a. The mounting tube body 33b is cylindrical and arranged coaxially with the container axis O. The mounting tube body 33b opens downward. A female thread is formed on the inner peripheral surface of the mounting tube body 33b. The female thread of the mounting tube body 33b is threadedly engaged with a male thread formed on the opening 21 of the container body 20. In this way, the mounting tube 33 is mounted to the opening 21, and the dispenser 30 is fixed to the container body 20.

[0016] The guide tube portion 33c protrudes upward from the radial inner edge of the annular plate portion 33a. The guide tube portion 33c is cylindrical and arranged coaxially with the container axis O. The guide tube portion 33c opens upward. An engagement protrusion that protrudes radially inward is formed on the inner circumferential surface at the upper end of the guide tube portion 33c. The outer cylinder portion 33d protrudes upward from the annular plate portion 33a. The outer cylinder portion 33d is arranged radially outside the guide cylinder portion 33c with a gap therebetween. The outer cylinder portion 33d is located radially inside the mounting cylinder main body 33b. The outer cylinder portion 33d is cylindrical and arranged coaxially with the container axis O. The outer cylinder portion 33d opens upward. The upper end of the outer cylinder portion 33d is located slightly above the upper end of the guide cylinder portion 33c.

[0017] The first cylinder portion 31 is disposed coaxially with the container axis O and has a cylindrical shape extending in the vertical direction. The first cylinder portion 31 is open on both vertical sides. The first cylinder portion 31 extends from the inside of the mounting tube portion 33, protruding downward beyond the mounting tube portion 33. The first cylinder portion 31 is inserted into the inside of the container body 20. The outer diameter of the first cylinder portion 31 is smaller than the inner diameter of the annular plate portion 33a. The upper end of the suction tube 31i is fitted into the lower end of the first cylinder portion 31. Although not shown, the suction tube 31i is open on both ends, and its lower end is immersed in the contents C. The inside of the first cylinder portion 31 is connected to the inside of the container body 20 via the suction tube 31i.

[0018] A cylinder flange 31b extending radially outward is provided at the upper end of the first cylinder 31. In this embodiment, the first cylinder 31 and the cylinder flange 31b are integrally molded. The cylinder flange 31b is fitted into the interior of the upper end of the mounting cylinder main body 33b. This allows the first cylinder 31 to be attached to the mounting cylinder 33 via the cylinder flange 31b. The upper surface of the cylinder flange 31b is in contact with the lower surface of the annular plate 33a. The lower surface of the cylinder flange 31b is in contact with the upper end of the mouth 21 of the container main body 20 via the seal member 40.

[0019] A check valve 31f is provided in the first cylinder 31. In this embodiment, the check valve 31f is provided near the lower end of the first cylinder 31. The check valve 31f is located below the mounting tubular portion 33. The check valve 31f has a valve seat 31g that protrudes radially inward from the inner circumferential surface of the first cylinder 31, and a ball valve 31h that is located above the valve seat 31g.

[0020] The valve seat portion 31g is formed in a tapered cylindrical shape that extends downward as it goes radially inward. The ball valve 31h is accommodated in a storage space 31j surrounded by the inner circumferential surface of the first cylinder portion 31, the upper surface of the valve seat portion 31g, and the lower surface of the columnar portion 39. The ball valve 31h can move toward and away from the valve seat portion 31g. When the ball valve 31h is seated on the valve seat portion 31g, the storage space 31j is blocked from a portion of the interior of the first cylinder portion 31 that is located below the storage space 31j. This blocks communication between the interior of the first cylinder portion 31 and the interior of the container body 20. When the ball valve 31h is separated from the valve seat portion 31g, the storage space 31j is connected to a portion of the interior of the first cylinder portion 31 that is located below the storage space 31j. This allows communication between the interior of the first cylinder portion 31 and the interior of the container body 20 via the storage space 31j. 1 to 3 show a state in which the ball valve 31h is seated on the valve seat portion 31g.

[0021] When the contents C in the container body 20 attempt to flow into the inside of the first cylinder portion 31 through the suction tube 31i, the ball valve 31h is pushed upward by the contents C and moves away from the valve seat portion 31g. As a result, the inside of the first cylinder portion 31 and the inside of the container body 20 are connected to each other, and the contents C flow into the inside of the first cylinder portion 31 through the suction tube 31i. On the other hand, when the contents C that have flowed into the first cylinder portion 31 attempt to flow back into the container body 20, the ball valve 31h is pressed against the valve seat portion 31g by the contents C and seats on it. This blocks communication between the inside of the first cylinder portion 31 and the inside of the container body 20, preventing the contents C in the first cylinder portion 31 from flowing back into the container body 20. In this manner, the check valve portion 31f allows the flow of the contents C from the inside of the container body 20 to the inside of the first cylinder portion 31, and blocks the flow of the contents C from the inside of the first cylinder portion 31 to the inside of the container body 20.

[0022] The first cylinder portion 31 is provided with an outside air introduction hole 31d that radially penetrates the peripheral wall portion 31a of the first cylinder portion 31. The outside air introduction hole 31d is located above the lower end of the mounting tube portion 33. The outside air introduction hole 31d is located inside the mounting tube portion 33 and opens into the inside of the mouth portion 21 of the container body 20. The outside air introduction hole 31d is located above a first piston portion 36b, which will be described later.

[0023] The second cylinder portion 32 is disposed above the first cylinder portion 31 and is movable downward while being biased upward. The second cylinder portion 32 is disposed coaxially with the container axis O and is cylindrical with a top that opens downward. The second cylinder portion 32 has a top wall portion 32a and a tubular portion 32b. The top wall portion 32a is disk-shaped and disposed coaxially with the container axis O. A through-hole 32c that passes through the top wall portion 32a in the vertical direction is formed in the center of the top wall portion 32a.

[0024] The tubular portion 32b extends downward from the radial outer edge of the top wall portion 32a. The tubular portion 32b is arranged coaxially with the container axis O and has a cylindrical shape that opens downward. The inner diameter of the tubular portion 32b, i.e., the inner diameter of the second cylinder portion 32, is larger than the inner diameter of the peripheral wall portion 31a, i.e., the inner diameter of the first cylinder portion 31. The tubular portion 32b is fitted into the radially inner side of the guide tubular portion 33c via a gap. The tubular portion 32b is movable up and down relative to the guide tubular portion 33c. An engagement protrusion that protrudes radially outward is formed on the outer peripheral surface of the lower end of the tubular portion 32b. The engagement protrusion of the tubular portion 32b engages with the engagement protrusion of the guide tubular portion 33c from below.

[0025] The second cylinder portion 32 is provided with an inner cylinder portion 32d and an outer cylinder portion 32e that protrude upward from the upper surface of the top wall portion 32a. In this embodiment, the inner cylinder portion 32d and the outer cylinder portion 32e are integrally molded with the second cylinder portion 32. The inner cylinder portion 32d and the outer cylinder portion 32e are arranged coaxially with the container axis O and have a cylindrical shape that opens upward. The outer cylinder portion 32e is located radially outward of the inner cylinder portion 32d. The inner cylinder portion 32d protrudes upward from the periphery of the through-hole 32c in the top wall portion 32a. The interior of the inner cylinder portion 32d is connected to the interior of the cylinder portion 32b via the through-hole 32c. The outer cylinder portion 32e protrudes upward from the radial outer edge of the top wall portion 32a. The upper end of the outer cylinder portion 32e is located lower than the upper end of the inner cylinder portion 32d.

[0026] The head portion 35 is attached to the second cylinder portion 32. The head portion 35 is disposed coaxially with the container axis O and is a generally cylindrical shape with a top that opens downward. The head portion 35 is movable downward together with the second cylinder portion 32 while being biased upward. The head portion 35 has a head top wall portion 35a, a head outer cylinder portion 35b that extends downward from the radial outer edge of the head top wall portion 35a, and a head inner cylinder portion 35c that is located radially inside the head outer cylinder portion 35b and extends downward from the head top wall portion 35a.

[0027] The head outer cylinder portion 35b is located radially outside the second cylinder portion 32. The lower end of the head outer cylinder portion 35b is located higher than the lower end of the second cylinder portion 32. The lower end of the head outer cylinder portion 35b is inserted radially between the guide cylinder portion 33c and the outer cylinder portion 33d of the mounting cylinder portion 33. The head inner cylinder portion 35c is fitted onto the inner cylinder portion 32d provided in the second cylinder portion 32. As a result, the head portion 35 is attached to the second cylinder portion 32 via the inner cylinder portion 32d. The lower end of the head inner cylinder portion 35c is in contact with the upper surface of the top wall portion 32a of the second cylinder portion 32. The lower end of the head inner cylinder portion 35c is inserted radially between the inner cylinder portion 32d and the outer cylinder portion 32e provided in the second cylinder portion 32.

[0028] The head portion 35 has a nozzle portion 35d. The nozzle portion 35d has a nozzle through-hole 35e, a nozzle tip 35f, and a nozzle shaft portion 35g. The nozzle through-hole 35e is a hole that extends radially from the outer peripheral surface of the head outer cylindrical portion 35b to the inner peripheral surface of the head inner cylindrical portion 35c. The nozzle tip 35f is fixed by being fitted into the nozzle through-hole 35e from the radially outer side. The nozzle tip 35f is a cylindrical member that opens radially inward and has a lid portion on the radially outer side. A discharge hole 35h that penetrates the lid portion of the nozzle tip 35f in the radial direction is formed in the center of the lid portion. The discharge hole 35h is connected to the interior of the second cylinder portion 32 via the nozzle through-hole 35e, the interior of the head inner cylinder portion 35c, the interior of the inner cylinder portion 32d provided in the second cylinder portion 32, and the through-hole 32c.

[0029] Nozzle shaft 35g protrudes radially outward from head inner cylinder 35c. Nozzle shaft 35g is inserted into nozzle tip 35f. The radially outer end of nozzle shaft 35g faces the lid of nozzle tip 35f across a gap. The outer peripheral surface of nozzle shaft 35g faces the inner peripheral surface of nozzle tip 35f across a gap.

[0030] The movable part 34 is disposed vertically between the first cylinder part 31 and the second cylinder part 32, and is movable downward while being biased upward. The movable part 34 is disposed coaxially with the container axis O and has a cylindrical shape extending vertically. The movable part 34 opens downward. In this embodiment, the movable part 34 has a first plunger 36 and a second plunger 37 fitted onto the first plunger 36.

[0031] The first plunger 36 is disposed coaxially with the container axis O and has a cylindrical shape extending in the vertical direction. The first plunger 36 is open downward. The lower end of the first plunger 36 is inserted into the first cylinder portion 31. The upper end of the first plunger 36 is inserted into the second cylinder portion 32. The interior of the first plunger 36 is the interior of the cylindrical movable portion 34. The first plunger 36 has a cylindrical first plunger tube portion 36a extending in the vertical direction, a first piston portion 36b provided at the lower end of the first plunger tube portion 36a, and a pressure accumulator valve portion 36c which is the top wall portion of the first plunger 36.

[0032] The first piston portion 36b is disposed inside the first cylinder portion 31. The first piston portion 36b protrudes downward from the radially outer edge portion at the lower end of the first plunger cylindrical portion 36a. The first piston portion 36b extends radially outward as it extends downward. The first piston portion 36b is disposed coaxially with the container axis O and has a cylindrical shape that opens downward. The outer peripheral surface at the lower end of the first piston portion 36b contacts the inner peripheral surface of the first cylinder portion 31. The first piston portion 36b is disposed inside the first cylinder portion 31 so as to be slidable in the up and down direction. The first piston portion 36b is located below the outside air introduction hole 31d provided in the first cylinder portion 31.

[0033] The accumulator valve portion 36c is disposed coaxially with the container axis O and has a generally conical shape that is convex upward. The outer diameter of the upper end portion of the accumulator valve portion 36c is smaller than the inner diameter of the through-hole 32c provided in the second cylinder portion 32. The outer diameter of the lower end portion of the accumulator valve portion 36c is larger than the inner diameter of the through-hole 32c provided in the second cylinder portion 32. This allows the accumulator valve portion 36c to close the through-hole 32c by being inserted into the through-hole 32c from below.

[0034] FIG. 1 shows a state in which the through-hole 32c is closed by the pressure accumulator valve portion 36c. When the through-hole 32c is closed by the pressure accumulator valve portion 36c, communication between the interior of the second cylinder portion 32 and the discharge hole 35h is blocked. FIG. 2 shows a state in which the pressure accumulator valve portion 36c is separated below the through-hole 32c, and the through-hole 32c is open. When the through-hole 32c is open, communication between the interior of the second cylinder portion 32 and the discharge hole 35h is established. In this way, the pressure accumulator valve portion 36c can open and close the space between the interior of the second cylinder portion 32 and the discharge hole 35h.

[0035] As shown in FIG. 1 , the pressure accumulator valve portion 36c is provided with a communication hole portion 36d that vertically penetrates the pressure accumulator valve portion 36c. The communication hole portion 36d connects the interior of the first plunger 36 to the exterior of the first plunger 36. The communication hole portion 36d is disposed coaxially with the container axis O and vertically penetrates the radial center portion of the pressure accumulator valve portion 36c, i.e., the upper end portion of the pressure accumulator valve portion 36c. The communication hole portion 36d communicates the interior of the first plunger 36 with the discharge hole 35h via the through-hole 32c provided in the second cylinder portion 32, the interior of the inner tube portion 32d, and the nozzle through-hole 35e. In other words, the communication hole portion 36d communicates the interior of the movable portion 34 with the discharge hole 35h.

[0036] The first plunger 36 is provided with a hole 36e that radially penetrates the wall of the first plunger cylindrical portion 36a. The hole 36e is provided in the vertical center of the first plunger cylindrical portion 36a. A plurality of the hole 36e is provided at intervals along the circumferential direction centered on the container axis O. The first plunger 36 is provided with grooves 36f recessed radially inward from the outer circumferential surface of the first plunger 36 and extending in the vertical direction. In this embodiment, the grooves 36f extend from a portion of the first plunger cylindrical portion 36a that is located slightly below the holes 36e to the upper end of the first plunger cylindrical portion 36a. The grooves 36f open upward. A plurality of the grooves 36f are provided at intervals along the circumferential direction centered on the container axis O. The lower end of each groove 36f is connected to the radially outer end of the corresponding hole 36e.

[0037] The first plunger 36 is provided with a seal protrusion 36k that protrudes radially inward from the inner circumferential surface of the first plunger 36, i.e., the inner circumferential surface of the movable portion 34. The seal protrusion 36k is annular and surrounds the columnar portion 39. In this embodiment, the seal protrusion 36k is annular and arranged coaxially with the container axis O. The cross-sectional shape of the seal protrusion 36k perpendicular to the circumferential direction is a substantially semicircular shape that protrudes radially inward. The seal protrusion 36k is provided in a portion of the inner circumferential surface of the first plunger 36 that is located above the hole 36e. The seal protrusion 36k is arranged slightly above the hole 36e. The seal protrusion 36k is in contact with the outer circumferential surface of the columnar portion 39 around the entire circumferential direction. The seal protrusion 36k contacts the outer circumferential surface of the columnar portion 39, thereby sealing the radial gap between the inner circumferential surface of the movable portion 34 and the outer circumferential surface of the columnar portion 39 around the entire circumferential direction. In this embodiment, the sealing protrusion 36k comes into contact with the outer peripheral surface of a second portion 39h of the columnar portion 39 that is located above a recess 39e, which will be described later.

[0038] As shown in FIG. 1 , the second plunger 37 is disposed coaxially with the container axis O and has a cylindrical shape with an end extending in the vertical direction. The second plunger 37 is open on both vertical sides. The second plunger 37 is fitted onto and fixed to the first plunger 36. The lower end of the second plunger 37 is inserted into the first cylinder portion 31. The upper end of the second plunger 37 is inserted into the second cylinder portion 32. The second plunger 37 has a cylindrical second plunger tube portion 37a extending in the vertical direction, a second piston portion 37c provided at the upper end of the second plunger tube portion 37a, and an annular seal portion 37d provided at the lower end of the second plunger tube portion 37a.

[0039] The second plunger cylindrical portion 37a is fitted onto and fixed to the first plunger cylindrical portion 36a. The lower end of the second plunger cylindrical portion 37a abuts from above against a step portion provided on the outer peripheral surface of the first plunger cylindrical portion 36a. The lower end of the second plunger cylindrical portion 37a is inserted into the first cylinder portion 31. The upper end of the second plunger cylindrical portion 37a is inserted into the second cylinder portion 32. The upper end of the second plunger cylindrical portion 37a is located below the pressure accumulator valve portion 36c. The inner peripheral surface of the second plunger cylindrical portion 37a closes the radially outer opening of a groove portion 36f provided on the outer peripheral surface of the first plunger cylindrical portion 36a.

[0040] The second piston portion 37c is inserted into the second cylinder portion 32. The second piston portion 37c protrudes radially outward from the upper end of the second plunger cylindrical portion 37a. The second piston portion 37c is disposed coaxially with the container axis O and has a cylindrical shape that is open on both sides in the vertical direction. The vertical center portion of the second piston portion 37c is connected to the outer circumferential surface of the upper end of the second plunger cylindrical portion 37a. The upper portion of the second piston portion 37c extends radially outward as it extends upward. The upper end of the second piston portion 37c is located below the upper end of the pressure accumulator valve portion 36c. The lower portion of the second piston portion 37c extends radially outward as it extends downward. The outer circumferential surface at the upper end of the second piston portion 37c and the outer circumferential surface at the lower end of the second piston portion 37c are in contact with the inner circumferential surface of the second cylinder portion 32. The second piston portion 37c is disposed inside the second cylinder portion 32 so as to be slidable vertically. The area of ​​the surface of the second piston portion 37c that receives the pressure in the second cylinder portion 32 (pressure receiving area) is larger than the area of ​​the surface of the first piston portion 36b that receives the pressure in the first cylinder portion 31 (pressure receiving area).

[0041] The annular seal portion 37d is disposed inside the first cylinder portion 31. The annular seal portion 37d protrudes downward from the radially outer edge portion at the lower end of the second plunger tube portion 37a. The annular seal portion 37d extends radially outward as it extends downward. The annular seal portion 37d is disposed coaxially with the container axis O and has a cylindrical shape that opens downward. The outer peripheral surface at the lower end of the annular seal portion 37d contacts the inner peripheral surface of the first cylinder portion 31. The annular seal portion 37d is disposed inside the first cylinder portion 31 so as to be slidable in the up and down direction. The annular seal portion 37d is located above the first piston portion 36b. When the dispenser 30 is not operated, the annular seal portion 37d is located above the outside air introduction hole 31d. The state in which the dispenser 30 is not being operated refers to the state in which the head portion 35 is not pressed down, which is the state shown in FIG.

[0042] The movable portion 34 is provided with a communication passage 34a that connects the interior of the first cylinder portion 31 and the interior of the second cylinder portion 32. More specifically, the communication passage 34a connects a portion of the interior of the first cylinder portion 31 that is located below the first piston portion 36b with a portion of the interior of the second cylinder portion 32 that is located above the second piston portion 37c. In this embodiment, the interior of the communication passage 34a is configured by a portion of the interior of the first plunger 36 that is located below the hole 36e, the interior of the hole 36e, and the interior of the groove 36f. The communication passage 34a opens upward through an upper end opening of the groove 36f and communicates with the interior of the second cylinder portion 32. The communication passage 34a opens downward through a lower end opening of the first plunger tube portion 36a and communicates with the interior of the first cylinder portion 31.

[0043] The columnar portion 39 is arranged coaxially with the container axis O and has a cylindrical shape extending in the vertical direction. A portion of the columnar portion 39 is arranged inside the first cylinder portion 31. The columnar portion 39 protrudes from inside the first cylinder portion 31 above the first cylinder portion 31. The columnar portion 39 is inserted into the interior of the movable portion 34 from below. In this embodiment, the columnar portion 39 is inserted into the interior of the first plunger 36 from below. The upper end of the columnar portion 39 is located above the seal protrusion 36k. The upper end of the columnar portion 39 is arranged below and spaced from the pressure accumulator valve portion 36c. The columnar portion 39 has a large diameter portion 39a, a small diameter portion 39b, a tapered portion 39c, and a plurality of leg portions 39d. The large diameter portion 39a is a lower portion of the columnar portion 39. The large diameter portion 39a is disposed inside the first cylinder portion 31. The lower surface of the large diameter portion 39a is the lower surface of the columnar portion 39 that defines the accommodation space 31j.

[0044] The small diameter portion 39b is the upper part of the columnar portion 39. The lower part of the small diameter portion 39b is disposed inside the first cylinder portion 31. The upper end of the small diameter portion 39b is the upper end of the columnar portion 39. The upper end of the small diameter portion 39b is positioned higher than the upper end of the first cylinder portion 31. The vertical dimension of the small diameter portion 39b is larger than the vertical dimension of the large diameter portion 39a. The outer diameter of the small diameter portion 39b is smaller than the outer diameter of the large diameter portion 39a. The small diameter portion 39b is inserted from below into the interior of the movable portion 34, i.e., the interior of the first plunger 36.

[0045] The tapered portion 39c is a portion that connects the large diameter portion 39a and the small diameter portion 39b. The outer diameter of the tapered portion 39c decreases from bottom to top. The outer diameter of the lower end of the tapered portion 39c is the same as the outer diameter of the large diameter portion 39a. The outer diameter of the upper end of the tapered portion 39c is the same as the outer diameter of the lower end of the small diameter portion 39b. The multiple leg portions 39d protrude radially outward from the lower end of the large diameter portion 39a. The multiple leg portions 39d are arranged at intervals from one another in the circumferential direction centered on the container axis O. The lower ends of the leg portions 39d are located below the large diameter portion 39a. The lower ends of the leg portions 39d abut against a step portion provided on the inner circumferential surface of the first cylinder portion 31. As a result, the columnar portion 39 is supported from below by the step portion provided on the inner circumferential surface of the first cylinder portion 31.

[0046] The columnar portion 39 is provided with a recess 39e recessed radially inward from the outer peripheral surface of the columnar portion 39. In this embodiment, the recess 39e is provided in the vertical center of the small diameter portion 39b of the columnar portion 39. The recess 39e is provided around the entire circumferential direction. The recess 39e is annular and arranged coaxially with the container axis O. Due to the provision of the recess 39e, the outer diameter of the small diameter portion 39b is smaller in the vertical center. The portion of the columnar portion 39 where the recess 39e is provided is located inside the movable portion 34. The recess 39e is located below the sealing protrusion 36k when the dispenser 30 is not operated. The vertical dimension of the recess 39e is greater than the vertical dimension of the sealing protrusion 36k. 4, the outer diameter of a first portion 39g of small diameter portion 39b in columnar portion 39 that is located below recess 39e is slightly larger than the outer diameter of a second portion 39h of small diameter portion 39b that is located above recess 39e. The outer diameters of first portion 39g and second portion 39h are larger than the outer diameter of the portion of small diameter portion 39b where recess 39e is provided.

[0047] As shown in FIG. 1 , the biasing member 38 is a coil spring extending in the vertical direction. The biasing member 38 is housed inside the first cylinder portion 31. The lower end of the biasing member 38 contacts the multiple legs 39d of the columnar portion 39 from above. The upper end of the biasing member 38 contacts the movable portion 34 from below, applying an upward elastic force to the movable portion 34. The biasing member 38 also applies an upward elastic force to the second cylinder portion 32 and the head portion 35 via the movable portion 34. As a result, the movable portion 34, the second cylinder portion 32, and the head portion 35 are biased upward by the biasing member 38. In this embodiment, the upper end of the biasing member 38 contacts the lower end of the first plunger cylindrical portion 36a.

[0048] 2, when the head portion 35 is pressed downward against the elastic force of the biasing member 38, the second cylinder portion 32 and the movable portion 34 are pressed downward together with the head portion 35. As a result, the first piston portion 36b moves downward, and the volume of the portion of the inside of the first cylinder portion 31 located between the first piston portion 36b and the check valve portion 31f decreases. Therefore, the inside of the second cylinder portion 32, which is connected to the inside of the first cylinder portion 31 via the communicating flow path portion 34a, is pressurized. At this time, the check valve portion 31f is in a closed state.

[0049] Here, when the head portion 35 is pressed down, the pressure inside the first cylinder portion 31 and the pressure inside the second cylinder portion 32 become the same. However, because the pressure-receiving area of ​​the second piston portion 37c is larger than the pressure-receiving area of ​​the first piston portion 36b, the downward force that the movable portion 34 receives from the contents C inside the second cylinder portion 32 is greater than the upward force that the movable portion 34 receives from the contents C inside the first cylinder portion 31. Therefore, when the insides of the first cylinder portion 31 and the second cylinder portion 32 are pressurized, the pressure inside the second cylinder portion 32 causes the movable portion 34 to move downward relative to the second cylinder portion 32 against the elastic force of the biasing member 38. As a result, the pressure accumulator valve portion 36c moves downwardly relative to the through-hole 32c, opening the through-hole 32c. Therefore, the contents C contained inside the second cylinder portion 32 flows through the through-hole 32c to the nozzle portion 35d and is discharged from the discharge hole 35h.

[0050] When the head portion 35 is pushed down, the annular seal portion 37d moves downward below the outside air introduction hole 31d, and the outside air introduction hole 31d and the inside of the guide tube portion 33c are connected to each other. As a result, the inside of the container body 20 is connected to the outside of the dispensing container 10 via the gap between the tube portion 32b of the second cylinder portion 32 and the guide tube portion 33c, the inside of the guide tube portion 33c, and the outside air introduction hole 31d. Therefore, when the head portion 35 is pushed down to discharge the content C, air outside the dispensing container 10 flows into the inside of the container body 20, and a decrease in the pressure inside the container body 20 can be suppressed.

[0051] As shown in FIG. 3 , when the head portion 35 is further pressed down and the movable portion 34 moves downward, the sealing protrusion 36k provided on the movable portion 34 reaches a position radially opposite the recess 39e provided on the columnar portion 39. Here, the sealing protrusion 36k faces the recess 39e in the radial direction when the head portion 35 is pressed down to the bottom end position. That is, the recess 39e faces the sealing protrusion 36k in the radial direction when the head portion 35 is pressed down to the bottom end position. However, as described above, when the contents C are discharged, the movable portion 34 is pressed down below the head portion 35 and the second cylinder portion 32. Therefore, the sealing protrusion 36k reaches a position facing the recess 39e before the head portion 35 is pressed down to the bottom end position.

[0052] In this embodiment, the state in which the head portion 35 is pushed down to the lower end position means that the lower end of the second cylinder portion 32 abuts against the upper surface of the cylinder flange portion 31b provided on the first cylinder portion 31, which is the state shown in Figures 3 and 4. Furthermore, in a state where the recess 39e and the sealing protrusion 36k are radially opposed to each other, the portion of the first plunger 36 where the hole 36e is provided is fitted onto the upper end of the first portion 39g of the columnar portion 39.

[0053] When the seal protrusion 36k faces the recess 39e in the radial direction, the seal protrusion 36k is spaced radially outward from the outer circumferential surface of the columnar portion 39. This opens the radial gap between the inner circumferential surface of the movable portion 34 and the outer circumferential surface of the columnar portion 39, and a portion of the interior of the first cylinder portion 31 located below the first piston portion 36b communicates with the communication hole 36d, which communicates the interior of the movable portion 34 with the discharge hole 35h, via a gap between the outer circumferential surface of the columnar portion 39 and the inner circumferential surface of the movable portion 34 and a portion of the interior of the movable portion 34 located above the columnar portion 39. As a result, when the seal protrusion 36k faces the recess 39e in the radial direction, a portion of the interior of the first cylinder portion 31 located below the first piston portion 36b communicates with the discharge hole 35h via the gap between the inner circumferential surface of the movable portion 34 and the outer circumferential surface of the columnar portion 39 and the communication hole 36d. Therefore, at least a part of the content C in the first cylinder portion 31 and the air in the first cylinder portion 31 flow from the communication hole portion 36d to the discharge hole 35h, and are discharged to the outside of the dispenser 30 from the discharge hole 35h.

[0054] In this manner, when the sealing protrusion 36k is radially opposed to the recess 39e, the communication hole 36d communicates the discharge hole 35h with a portion of the interior of the first cylinder 31 located below the first piston 36b via a gap between the inner circumferential surface of the movable portion 34 and the outer circumferential surface of the columnar portion 39. This allows the pressure inside the first cylinder 31 to escape to the outside of the discharge container 10 via the discharge hole 35h. Therefore, after the head portion 35 is pressed down to the bottom end position, the pressure inside the first cylinder 31 can be suitably reduced when the head portion 35 is restored upward by the biasing member 38. This allows the contents C inside the container body 20 to be suitably sucked into the first cylinder 31 via the suction tube 31i. Therefore, the contents C can be suitably discharged even when the head portion 35 is pressed down again. Furthermore, by reducing the pressure inside the first cylinder portion 31 and releasing the pressurized state inside the first cylinder portion 31, dripping of the contents C from the discharge hole 35h can be suppressed. In other words, dripping from the discharge hole 35h can be suppressed, resulting in a dispenser 30 with good liquid drainage. Furthermore, when priming is performed, the air compressed inside the first cylinder portion 31 can be suitably discharged from the discharge hole 35h. This reduces the number of times priming is performed.

[0055] When the seal protrusion 36k faces the recess 39e in the radial direction and a portion of the interior of the first cylinder 31 located below the first piston 36b communicates with the discharge hole 35h, the pressure in the first cylinder 31 and the pressure in the second cylinder 32 decrease, and the movable portion 34 is pushed up by the biasing member 38. As a result, the accumulator valve 36c again closes the through-hole 32c. At this time, the head 35 is, for example, pushed down to its lower end position. As described above, in this embodiment, when the head 35 is pushed down to its lower end position, a portion of the interior of the first cylinder 31 located below the first piston 36b communicates with the discharge hole 35h. Therefore, even if the through-hole 32c is again closed by the pressure accumulator valve 36c, the contents C remaining in a pressurized state in the first cylinder 31 are discharged through the discharge hole 35h. At this time, the contents C in an unpressurized state remain in the first cylinder 31.

[0056] For example, by providing a through hole in the peripheral wall of the first cylinder portion 31, it is possible to configure the pressure inside the first cylinder portion 31 to be released into the container body 20 through the through hole. In this case, the contents C remaining in the first cylinder portion 31 are returned into the container body 20 through the through hole. Here, the amount of contents C returned into the container body 20 through the through hole varies depending on the speed at which the head portion 35 is pressed down. Specifically, when the head portion 35 is pressed down relatively quickly, the speed at which the inside of the first cylinder portion 31 is pressurized increases, and a relatively large amount of contents C is returned into the container body 20 through the through hole. On the other hand, when the head portion 35 is pressed down relatively slowly, the speed at which the inside of the first cylinder portion 31 is pressurized decreases, and a relatively small amount of contents C is returned into the container body 20 through the through hole. Therefore, the amount of the contents C sent from the first cylinder portion 31 to the discharge hole 35h varies depending on the speed at which the head portion 35 is pressed down, which causes a problem that the discharge amount of the contents C becomes unstable.

[0057] In contrast, according to the present embodiment, the accumulator valve portion 36c is provided with a communication hole 36d that communicates the interior of the movable portion 34 with the discharge hole 35h. The movable portion 34 is provided with an annular seal protrusion 36k that protrudes radially inward from the inner circumferential surface of the movable portion 34 and contacts the outer circumferential surface of the columnar portion 39. The columnar portion 39 is provided with a recess 39e that is recessed radially inward from the outer circumferential surface of the columnar portion 39 and is located below the seal protrusion 36k. The movable portion 34 is movable to a position where the seal protrusion 36k and the recess 39e face each other in the radial direction. When the seal protrusion 36k faces the recess 39e in the radial direction, a portion of the interior of the first cylinder portion 31 that is located below the first piston portion 36b communicates with the discharge hole 35h via the gap between the inner circumferential surface of the movable portion 34 and the outer circumferential surface of the columnar portion 39 and the communication hole 36d. Therefore, as described above, when the sealing protrusion 36k is radially opposed to the recess 39e, the pressure inside the first cylinder portion 31 can be released from the discharge hole 35h to the outside of the dispenser 30. As a result, at least a portion of the contents C remaining in a pressurized state in a portion of the first cylinder portion 31 located below the first piston portion 36b is discharged from the discharge hole 35h to the outside of the dispenser 30 through the gap between the inner circumferential surface of the movable portion 34 and the outer circumferential surface of the columnar portion 39 and the communicating hole portion 36d. Therefore, a portion of the contents C sucked from inside the container body 20 into the first cylinder portion 31 is not returned into the container body 20. In other words, according to this embodiment, it is possible to prevent the contents C that have flowed into the first cylinder portion 31 from returning into the container body 20. Furthermore, since the contents C discharged from the first cylinder portion 31 as the pressure inside the first cylinder portion 31 is released can be discharged from the discharge hole 35h in this way, even if the rate at which the pressure inside the first cylinder portion 31 is increased changes depending on the speed at which the head portion 35 is pressed down, it is possible to prevent changes in the amount of contents C discharged from the discharge hole 35h. Therefore, according to this embodiment, a dispenser 30 having a structure that can stabilize the discharge amount of contents C is obtained. Furthermore, because a portion of the contents C sucked from inside the container body 20 into the first cylinder portion 31 is not returned to the container body 20, it is possible to prevent a decrease in the amount of contents C discharged from the discharge hole 35h, i.e., the discharge amount of contents C.

[0058] Furthermore, according to this embodiment, the recess 39e faces the seal protrusion 36k in the radial direction when the head portion 35 is pressed down to the lowest position. Therefore, when the head portion 35 is pressed down to the lowest position, the pressure inside the first cylinder portion 31 can be released through the discharge hole 35h. This makes it possible to more efficiently release the pressurized state inside the first cylinder portion 31. This allows the air compressed inside the first cylinder portion 31 to be more efficiently discharged through the discharge hole 35h when priming is performed, thereby further reducing the number of times priming is performed.

[0059] Second Embodiment 5, the dispenser 130 of this embodiment differs from the dispenser 30 of the first embodiment in that it includes a forward and inverted adapter 170. In the following description, the same components as those in the above-described embodiments may be denoted by the same reference numerals as appropriate and the description thereof may be omitted.

[0060] In this embodiment, the first cylinder portion 131 and the mounting tube portion 133 are integrally molded. Unlike the first embodiment, a suction tube 31i is not attached to the lower end of the first cylinder portion 131. In this embodiment, the head portion 135 and the second cylinder portion 132 are integrally molded. In the movable portion 134 of this embodiment, the first plunger 136 and the second plunger 137 are integrally molded. Unlike the movable portion 34 of the first embodiment, the movable portion 134 does not have an annular seal portion 37d. In this embodiment, the annular seal portion 37d is provided on a sealing tube member 160 that is provided separately from the movable portion 134. The sealing tube member 160 is disposed coaxially with the container axis O and has a cylindrical shape that opens on both sides in the vertical direction. The annular seal portion 37d is provided at the lower end of the sealing tube member 160. The upper portion of the sealing tube member 160 is fixed to a molded body including the head portion 135 and the second cylinder portion 132. This allows the cylindrical seal member 160 to move up and down together with the head portion 135 and the second cylinder portion 132.

[0061] The dispenser 130 of this embodiment is equipped with a forward / inverted adapter 170 that can supply the contents C into the first cylinder portion 131 when the first cylinder portion 131 is under negative pressure both when the dispenser 130 is upright and when it is in an inverted position. The forward / inverted adapter 170 is attached to the lower end of the first cylinder portion 131. The forward / inverted adapter 170 has a main body tubular portion 171 into which the first cylinder portion 131 is fitted, and a switching valve 172 arranged inside the main body tubular portion 171. The upper end of the suction tube 31i is attached to the lower end of the main body tubular portion 171.

[0062] The main body tube portion 171 is formed with an upright introduction hole 173 that opens toward the bottom of the container main body 20 and can introduce the contents C from the container main body 20 when the dispenser 130 is upright, an inverted introduction hole 174 that is arranged above the upright introduction hole 173 and can introduce the contents C from the container main body 20 when the dispenser 130 is inverted, and a communication passage 175 that connects the upright introduction hole 173 and the inverted introduction hole 174 with the lower end opening of the first cylinder portion 131. The switching valve 172 is a spherical valve body. When the discharger 130 is upright, the switching valve 172 blocks communication between the inverted introduction hole 174 and the communication passage 175, and when the discharger 130 is inverted, the switching valve 172 connects the inverted introduction hole 174 and the communication passage 175.

[0063] In this embodiment, the dispenser 130 further includes a cover member 150. The cover member 150 is disposed coaxially with the container axis O and is cylindrical and open on both the top and bottom sides. The cover member 150 is made of, for example, rubber. The cover member 150 is positioned radially outward from the first cylinder portion 131 and radially inward from the mounting tube portion 133. The cover member 150 surrounds the first cylinder portion 131. The cover member 150 includes a cylindrical cover main body portion 151 that is open on both the top and bottom sides, a cover valve portion 152 provided at the lower end of the cover main body portion 151, and a cover flange portion 153 that protrudes radially outward from the upper end of the cover main body portion 151.

[0064] The upper end of the cover main body 151 is surrounded by an annular seal member 40 . The cover valve portion 152 extends radially inward downward from the lower end of the cover main body portion 151. The lower end of the cover valve portion 152 contacts the outer peripheral surface of the first cylinder portion 131. The cover valve portion 152 releasably blocks communication between the outside air introduction hole 31d and the container main body 20. The cover flange portion 153 is sandwiched between the seal member 40 and the annular plate portion 33a of the mounting cylinder portion 133 in the vertical direction.

[0065] The cover member 150 covers the outside air introduction hole 31d provided in the first cylinder portion 131 from the radial outside. When the dispenser 130 is not being operated, the cover member 150 blocks the outside air introduction hole 31d from the inside of the container body 20. When air outside the dispenser 130 is taken in through the outside air introduction hole 31d, the cover valve portion 152 of the cover member 150 elastically deforms radially outward due to the pressure of the air. As a result, the lower end of the cover valve portion 152 moves radially outward away from the outer circumferential surface of the first cylinder portion 131, and the outside air introduction hole 31d communicates with the inside of the container body 20. Therefore, air outside the dispenser 130 can flow into the container body 20 through the outside air introduction hole 31d. The other configurations of the respective parts of the dispenser 130 can be similar to the other configurations of the respective parts of the dispenser 30 of the first embodiment.

[0066] For example, in a case where the dispenser 130 includes the forward / inverted adapter 170 as in this embodiment, and where the pressure inside the first cylinder portion 131 is released into the container body 20 through a through-hole provided in the peripheral wall of the first cylinder portion 131, when the dispenser 130 is inverted, the through-hole becomes blocked by the contents C. This makes it difficult to release the pressure inside the first cylinder portion 131 through the through-hole, and there is a risk that the contents C cannot be suitably sucked into the first cylinder portion 131. This may result in an unstable amount of the contents C being dispensed.

[0067] In contrast to this, in the present embodiment, as described above, the pressure inside the first cylinder portion 131 can be released through the discharge hole 35h. Therefore, even when the dispenser 130 is inverted, the pressure inside the first cylinder portion 131 can be suitably released. As a result, even when the dispenser 130 is inverted, the contents C can be suitably sucked into the first cylinder portion 131, and the amount of the contents C discharged can be stabilized. In this way, the effect of stabilizing the amount of the contents C discharged can be more effectively obtained in the dispenser 130 that includes the forward / inverted adapter 170.

[0068] Furthermore, according to this embodiment, the dispenser 130 includes a cover member 150 that covers the outside air introduction hole 31d provided in the first cylinder portion 131 from the radially outer side. Therefore, when the dispenser 130 is inverted, the outside air introduction hole 31d can be prevented from being blocked by the contents C. The cover member 150 also includes a cover valve portion 152 that releasably blocks the outside air introduction hole 31d from the container body 20. Therefore, when air flows into the outside air introduction hole 31d from outside the dispenser 130, the pressure of the air opens the cover valve portion 152, allowing the air to flow into the container body 20 from the outside air introduction hole 31d. This allows air to flow into the container body 20 from the outside air introduction hole 31d in a suitable manner, even when the dispenser 130 is inverted.

[0069] The present invention is not limited to the above-described embodiment, and the following configurations may also be adopted. The recess provided in the columnar portion may have any shape as long as it is recessed radially inward from the outer circumferential surface of the columnar portion and can face the sealing protrusion in the radial direction. The recess does not have to be annular. A plurality of recesses may be provided along the circumferential direction around the axis of the container. As long as the movable portion is movable to a position where the seal protrusion and the recess provided in the columnar portion are radially opposed to each other, the recess need not be radially opposed to the seal protrusion when the head portion is pressed down to its lower end position. For example, in the first embodiment described above, as long as the seal protrusion 36k and the recess 39e are radially opposed to each other when the movable portion 34 is moved downward relative to the second cylinder portion 32 due to the pressure inside the second cylinder portion 32, the seal protrusion 36k and the recess 39e do not need to be radially opposed to each other when the head portion 35 is pressed down to its lower end position. The forward and inverted adapter may have any structure as long as it can supply contents into the first cylinder when negative pressure is created inside the first cylinder both when the dispenser is upright and when it is inverted. The configurations described in this specification can be combined with each other within the scope of not being mutually inconsistent. [Explanation of symbols]

[0070] 20...container body, 21...mouth portion, 30,130...discharger, 31,131...first cylinder portion, 31f...check valve portion, 32,132...second cylinder portion, 34,134...movable portion, 34a...communicating flow path portion, 35,135...head portion, 35h...discharge hole, 36b...first piston portion, 36c...accumulator valve portion, 36d...communicating hole portion, 36k...seal protrusion portion, 37c...second piston portion, 39...columnar portion, 39e...recess portion, C...contents

Claims

1. A dispenser that is attached to the mouth of a container body that contains contents, a first cylinder portion whose interior is connected to the interior of the container body; a second cylinder portion disposed above the first cylinder portion and movable downward in an upward biased state; a cylindrical movable portion that is disposed between the first cylinder portion and the second cylinder portion in the vertical direction, that is movable downward in an upward biased state, and that opens downward; a columnar portion inserted into the movable portion from below; a head portion having a discharge hole communicating with the interior of the second cylinder portion; Equipped with The movable part is a first piston portion disposed inside the first cylinder portion and slidable in the up-down direction; a second piston portion disposed inside the second cylinder portion and slidable in the up-down direction; a communication flow path portion connecting the interior of the first cylinder portion and the interior of the second cylinder portion; an accumulator valve portion that can open and close between the inside of the second cylinder portion and the discharge hole; and The first cylinder portion is provided with a check valve portion that allows the content to flow from the inside of the container body to the inside of the first cylinder portion and blocks the content to flow from the inside of the first cylinder portion to the inside of the container body, the pressure accumulator valve portion is provided with a communication hole portion that communicates the interior of the movable portion with the discharge hole, the movable portion is provided with an annular seal protrusion that protrudes radially inward from an inner peripheral surface of the movable portion and that comes into contact with an outer peripheral surface of the columnar portion, The columnar portion is provided with a recess that is recessed radially inward from the outer circumferential surface of the columnar portion and is positioned below the seal protrusion, the movable portion is movable to a position where the seal protrusion and the seal recess face each other in a radial direction, When the sealing protrusion is radially opposed to the recess, a portion of the interior of the first cylinder portion that is positioned below the first piston portion communicates with the discharge hole via a gap between an inner peripheral surface of the movable portion and an outer peripheral surface of the columnar portion and the communication hole, an inner diameter of the communication hole portion is smaller than an inner diameter of a portion of the movable portion that is located above the sealing convex portion and below the pressure accumulator valve portion, and is also smaller than an outer diameter of a portion of the columnar portion that is located above the concave portion.

2. The dispenser according to claim 1 , wherein the recessed portion is radially opposed to the sealing protrusion portion when the head portion is pressed down to a lower end position.

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