Dispenser

Abstract

To provide a discharger which does not require an outside air introduction valve member to be supported by an annular packing while securing mountability of the outside air introduction valve member.SOLUTION: The discharger 2 includes the cylinder member 5 having the cylinder portion 5a, the annular wall 5b, and the extended cylinder portion 5c, the slide member 6, the holding member 7 having the discharge port C1, the internal flow path C, the upright and inverted dual unit 8 having the lower suction port C3 and the upper suction port C4, and the vent 5a1 provided in the cylinder portion 5a. An outside air introduction path P through which outside air is introduced into the vessel body 3 through the vent port 5a1 in accordance with the lifting and lowering operation of the holding member 7, an outside air introduction member 9 having a valve-body-supporting portion 5a that is held by being fitted to the cylinder-portion 5a1 below the vent port 9a and an outside air introduction valve-body 9a that extends radially outward from the valve-body-supporting portion 9b over the entire circumference, and an air-chamber-forming member 10 having a fitting portion 5c that is fitted to the extended-cylinder-portion 10a and a seating portion 9b on which the outside air introduction valve-body is seated are provided. 10b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A dispenser is known that is attached to the mouth of a container body and dispenses the contents of the container body to the outside in an upright or inverted position depending on the operation, the dispenser having an air vent provided in the cylinder part, an outside air introduction path that introduces outside air into the container body through the air vent, and an outside air introduction valve member that is provided around the entire circumference of the cylinder part, straddling the air vent in the vertical direction, has a fitting part that is in close contact with the outer peripheral surface of the cylinder part above the air vent and has an outside air introduction valve body below the air vent, the outside air introduction valve body contacting the outer peripheral surface of the cylinder part when dispensing in an inverted position prevents the contents from leaking into the outside air introduction path, and moves away from the outer peripheral surface of the cylinder part when outside air is introduced through the outside air introduction path, allowing outside air to be introduced into the container body (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-65877 Summary of the Invention [Problem to be solved by the invention]

[0004] When using an outside air introduction valve member configured as described above, considering ease of installation, the fitting portion of the outside air introduction valve member cannot be fitted too tightly to the outer peripheral surface of the cylinder portion, and in order to prevent the outside air introduction valve member from shifting downward, it is necessary to provide a flange-shaped protrusion at the upper end of the outside air introduction valve member, as described in Patent Document 1, and to support the protrusion from below by an annular gasket that is tightly fitted against the upper surface of the mouth of the container body.

[0005] However, in cases where it is desired to have a structure in which the cylinder portion having an air vent is inserted deep downward inside the mouth of a wide-mouthed container body, it may not be possible to adopt the configuration in which the outside air intake valve member is supported from below by an annular gasket as described above.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a dispenser that ensures the ease of attachment of an outside air introduction valve member, while eliminating the need to support the outside air introduction valve member with an annular packing. [Means for solving the problem]

[0007] One aspect of the present invention is as follows.

[0008] [1] A dispenser that is attached to the mouth of a container body and dispenses the contents of the container body to the outside in response to an operation, a cylinder member having a cylinder portion, an annular wall extending radially outward from an upper end of the cylinder portion around the entire circumference, and an extension tubular portion extending upward from an outer peripheral edge of the annular wall; a sliding member that slides within the cylinder portion; a holding member having a discharge port and moving up and down relative to the cylinder portion together with the sliding member in response to the operation; an internal flow path that sends and discharges the content to the discharge port through a pump chamber defined by the cylinder portion and the sliding member in response to the lifting and lowering movement of the holding member; a normal / inverted unit having a lower suction port and an upper suction port provided above the lower suction port, wherein in an upright position, the lifting and lowering movement of the holding member causes the contents in the container body to flow from the lower suction port serving as an inlet of the internal flow path toward the pump chamber, and in an inverted position, the lifting and lowering movement of the holding member causes the contents in the container body to flow from the upper suction port serving as an inlet of the internal flow path toward the pump chamber; an outside air introduction path having an air vent provided in the cylinder portion, and introducing outside air into the container body through the air vent in response to the lifting and lowering movement of the holding member; an outside air introduction valve member including a valve body support portion that is fitted to an outer peripheral surface of the cylinder portion below the vent hole and is held thereon, and an outside air introduction valve body that extends radially outward from the valve body support portion over the entire circumference; an air chamber forming member having a fitting portion that fits into the outer peripheral surface of the extension cylindrical portion and a seating portion on which the outside air introduction valve body is seated; the air chamber forming member and the outside air introduction valve member are respectively assembled to the cylinder member from below, the outside air introduction path has an air chamber formed between the vent port and the seat portion by the air chamber forming member, the cylinder portion, the annular wall, and the outside air introduction valve member, The outside air introduction valve body prevents the contents from leaking into the outside air introduction path when the contents are ejected in the inverted position by sitting on the seating portion, and allows the outside air to be introduced into the container body by moving away from the seating portion when the outside air is introduced through the outside air introduction path.

[0009] [2] The dispenser has an attachment cap including an annular top wall, an outer peripheral wall portion extending downward from the outer peripheral edge of the top wall around the entire circumference, a female screw portion provided on the inner peripheral surface of the outer peripheral wall portion and screwed into the outer peripheral surface of the mouth portion, a seal tube extending downward from the top wall and in close contact with the inner peripheral surface of the mouth portion, and a fitting retainer portion provided on the inner peripheral edge of the top wall, The dispenser according to [1], wherein the extension tube portion is held by fitting into the fitting and holding portion.

[0010] [3] The discharger according to [1] or [2], wherein the air chamber forming member has an abutment portion that abuts against an upper surface of the valve body support portion of the outside air introduction valve member. [Effects of the Invention]

[0011] According to the present invention, it is possible to provide a dispenser that does not require the outside air introduction valve member to be supported by an annular packing while ensuring ease of attachment of the outside air introduction valve member. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a vertical cross-sectional view showing a state before discharging of the dispensing container in one embodiment of the present invention. [Figure 2] FIG. 2 is a vertical cross-sectional view showing a state during discharging of the discharge container shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0014] As shown in FIG. 1 , in one embodiment of the present invention, a discharge container 1 includes a dispenser 2 and a container body 3. The container body 3 includes a mouth 3a, a body 3b, and a bottom 3c, which are connected in this order, and contains a content 4. The content 4 is not particularly limited, but is a liquid in this embodiment. In this embodiment, the content 4 is a cosmetic product such as a lotion or antiperspirant, but is not limited thereto. The dispenser 2 is attached to the mouth 3a of the container body 3 and dispenses the content 4 from the container body 3 to the outside in response to operation. In this embodiment, the vertical direction is the direction along the central axis O of the cylinder 5a, and the upward direction is the direction from the cylinder 5a side to the discharge port C1 side (from the bottom 3c side of the container body 3 to the mouth 3a side) along the vertical direction, and the downward direction is the opposite direction.

[0015] As shown in FIGS. 1 and 2, the dispenser 2 comprises a cylinder member 5 having a cylindrical cylinder portion 5a, an annular wall 5b extending radially outward from the upper end of the cylinder portion 5a around the entire circumference, and a cylindrical extension tube portion 5c extending upward from the outer periphery of the annular wall 5b, a sliding member 6 sliding within the cylinder portion 5a, a holding member 7 having a discharge port C1 and moving up and down relative to the cylinder portion 5a together with the sliding member 6 in response to operation, an internal flow path C that sends and discharges the content 4 to the discharge port C1 in response to the up and down movement of the holding member 7 via a pump chamber C2 defined by the cylinder portion 5a and the sliding member 6, and a lower suction port C3 and an upper suction port C4 provided above the lower suction port C3. In the upright position (the position shown in FIGS. 1 and 2), the content 4 in the container body 3 is pumped from the lower suction port C3 serving as an inlet of the internal flow path C by the up and down movement of the holding member 7. In the inverted position (not shown), the holding member 7 moves up and down to cause the contents 4 in the container body 3 to flow from the upper suction port C4 serving as the inlet of the internal flow path C toward the suction port C5 of the pump chamber C2. ... The holding member 7 also has a vent port 5a1 provided in the cylinder portion 5a, and external air is introduced into the container body 3 through the vent port 5a1 in response to the movement of the holding member 7 up and down (the two-point chain in FIG. 2). The air chamber-forming member 10 includes an outside air introduction path P (see line arrow), an outside air introduction valve member 9 having a cylindrical valve body support portion 9a that is held by fitting to the outer peripheral surface of the cylinder portion 5a below the vent port 5a1, and an outside air introduction valve body 9b that is annular in top view and extends radially outward from the valve body support portion 9a all the way around, and an air chamber-forming member 10 that has a fitting portion 10a that fits to the outer peripheral surface of the extension cylindrical portion 5c and a seating portion 10b on which the outside air introduction valve body 9b sits. The air chamber-forming member 10 and the outside air introduction valve member 9 are each assembled to the cylinder member 5 from below. The outside air introduction path P has an air chamber P1 that is formed between the vent port 5a1 and the seating portion 10b by the air chamber-forming member 10, the cylinder portion 5a, the annular wall 5b, and the outside air introduction valve member 9. The outside air introduction valve body 9b prevents the contents 4 from leaking into the outside air introduction path P when ejected in an inverted position by sitting on the seating portion 10b, and allows outside air to be introduced into the container body 3 by moving away from the seating portion 10b when outside air is introduced through the outside air introduction path P.

[0016] The cylinder member 5 has a connecting tube portion 5d that reduces in diameter and extends downward from the lower end of the cylinder portion 5a, and the forward / inverted unit 8 is connected to the connecting tube portion 5d. The outer diameter of the forward / inverted unit 8 is equal to or smaller than the outer diameter of the cylinder portion 5a. The cylinder member 5 has a valve receiving portion 5e that extends radially inward from the connecting tube portion 5d and forms the suction port C5. The valve receiving portion 5e is provided with a movable valve 11 that is held within the suction port C5 and is movable in the vertical direction. The movable valve 11 closes the suction port C5 by descending and seating on the valve receiving portion 5e under its own weight, and opens the suction port C5 by rising and releasing the seat. Note that the arrangement of the valve receiving portion 5e and the movable valve 11 is not limited to this. A type of suction valve other than the movable valve 11 may also be provided. The cylinder member 5 and the air chamber-forming member 10 are each made of, for example, resin. The outside air introduction valve member 9 is made of, for example, resin or rubber.

[0017] According to the above configuration, when assembling the dispenser 2, the fitting portion 10a of the air chamber forming member 10 is slid from below onto the outer peripheral surface of the extension tubular portion 5c of the cylinder member 5, and then the valve element support portion 9a of the outside air introduction valve member 9 is slid from below onto the outer peripheral surface of the cylinder portion 5a of the cylinder member 5 to fit the air chamber forming member 10 and the outside air introduction valve member 9. Because the valve element support portion 9a is fitted below the vent opening 5a1, the sliding distance is shorter than when fitting above the vent opening 5a1 as in the conventional case. This allows for a relatively strong fitting force, even when considering ease of installation. Therefore, the outside air introduction valve member 9 can be held without supporting it with an annular packing as in the conventional case. The assembly of the air chamber forming member 10 and the outside air introduction valve member 9 to the cylinder member 5 may be performed before or after connecting the normal / inverted unit 8 to the cylinder member 5.

[0018] The dispenser 2 has an attachment cap 12 having an annular top wall 12a, an outer peripheral wall portion 12b extending downward from the outer peripheral edge of the top wall 12a around the entire circumference, a female thread portion 12c provided on the inner peripheral surface of the outer peripheral wall portion 12b and screwing into the outer peripheral surface of the mouth portion 3a, a cylindrical sealing tube 12d extending downward from the top wall 12a and in close contact with the inner peripheral surface of the mouth portion 3a, and a fitting retaining portion 12e provided on the inner peripheral edge of the top wall 12a, and the extension tube portion 5c is retained by fitting into the fitting retaining portion 12e. According to the above configuration, the seal between the dispenser 2 and the mouth 3a of the container body 3 can be formed by the seal tube 12d that is in close contact with the inner circumferential surface of the mouth 3a, and the cylinder member 5 can be held by the fitting holding portion 12e, so there is no need to sandwich a part of the cylinder member 5 and annular packing between the upper surface of the mouth 3a of the container body 3 and the attachment cap 12 as in the conventional case, which reduces the vertical width of the attachment cap 12 and improves the appearance of the dispenser 2. The configuration using the outside air introduction valve member 9 and the air chamber forming member 10 of this embodiment is particularly useful when the seal tube 12d is used instead of the annular packing as described above.

[0019] In addition, in this embodiment, the cylinder member 5 has an annular wall 5b and an extension tube portion 5c, and the attachment cap 12 has a fitting retaining portion 12e and a sealing tube 12d, so that the mouth portion 3a is configured to be wide-mouthed, and the refilling operation can be easily performed when refilling the contents 4 into the container body 3 for use.

[0020] The air chamber forming member 10 has an abutment portion 10e1 that abuts against the upper surface of the valve body support portion 9a of the outside air introduction valve member 9. According to the above configuration, the air chamber forming member 10 can be supported via the abutment portion 10e1 by the upper surface of the valve body support portion 9a, which is held by the cylinder portion 5a, and therefore the fitting force of the fitting portion 10a of the air chamber forming member 10 with respect to the extension tubular portion 5c of the cylinder member 5, which is required to hold the air chamber forming member 10 to the cylinder member 5, can be reduced, and as a result, the attachability of the air chamber forming member 10 can be improved.

[0021] The air chamber forming member 10 has a bottom wall 10c that is annular in bottom view, a cylindrical outer peripheral wall 10d that extends upward from the outer peripheral edge of the bottom wall 10c, a contact wall 10e that is also annular in bottom view, a cylindrical connecting wall 10f that connects the inner peripheral edge of the bottom wall 10c to the outer peripheral edge of the contact wall 10e and has an intermittent portion 10f1 in the circumferential direction, and a vertical rib 10g that extends upward from the upper surface of the bottom wall 10c along the inner peripheral surface of the outer peripheral wall 10d and has an upper end surface that abuts against the lower surface of the annular wall 5b, the inner peripheral surface of the outer peripheral wall 10d having a fitting portion 10a above the upper end surface of the vertical rib 10g, and the lower surface of the contact wall 10e having a contact portion 10e1. In this embodiment, a plurality of vertical ribs 10g are provided lined up in the circumferential direction, but this is not limited to this.

[0022] In this embodiment, the inner diameter of the contact wall 10e is larger than the outer diameter of the cylinder portion 5a. According to the above configuration, the attachment of the air chamber forming member 10 can be improved.

[0023] The ventilation opening 5a1 penetrates the cylinder portion 5a radially, and in the initial state before the holding member 7 is operated, the sliding member 6 blocks the outside air introduction path P (see Figure 1), and when the holding member 7 is operated to move down, the sliding member 6 can unblock the outside air introduction path P (see Figure 2).

[0024] The discharger 2 has a pressure accumulator cylinder section 13 having a smaller cross-sectional area than the cylinder section 5a, and a pressure accumulator sliding member 14 that slides within the pressure accumulator cylinder section 13, and the holding member 7, when operated, moves up and down relative to the cylinder section 5a together with the pressure accumulator sliding member 14, the pressure accumulator cylinder section 13, and the sliding member 6, and the internal flow path C sends and discharges the contents 4 to the discharge port C1 in accordance with the moving up and down of the holding member 7 via a pump chamber C2 defined by the pressure accumulator cylinder section 13, the pressure accumulator sliding member 14, the cylinder section 5a, and the sliding member 6, and the discharger 2, when operated, moves the holding member 7, when operated together with the pressure accumulator sliding member 14, downward relative to the cylinder section 5a together with the pressure accumulator cylinder section 13, and the sliding member 6, The pressure accumulator opening / closing unit 17 has a connecting portion 15 that connects the holding member 7 to the pressure accumulator cylinder portion 13 so that after the holding member 7 rises relative to the pressure accumulator cylinder portion 13, it performs an upward movement relative to the cylinder portion 5a together with the pressure accumulator cylinder portion 13 and the sliding member 6; a holding member biasing portion 16 (compression spring) that applies a biasing force to the holding member 7 for an upward movement relative to the cylinder portion 5a in order to raise the pressure accumulator cylinder portion 13 and the sliding member 6 via the connecting portion 15; and a pressure accumulator opening / closing unit 17 that opens the internal flow path C when the internal pressure of the pump chamber C2 increases due to the downward movement of the pressure accumulator sliding member 14 relative to the pressure accumulator cylinder portion 13, and closes when the internal pressure of the pump chamber C2 decreases due to the upward movement of the pressure accumulator sliding member 14 relative to the pressure accumulator cylinder portion 13.

[0025] According to the above configuration, when the operation is performed, the holding member 7, together with the pressure-accumulator sliding member 14, first descends relative to the pressure-accumulator cylinder portion 13, increasing the internal pressure of the pump chamber C2. As a result, the pressure-accumulator opening / closing portion 17 opens, and the increased internal pressure of the pump chamber C2 causes the contents 4 to be forcefully discharged to the outside. Further, by continuing the operation, the holding member 7, together with the pressure-accumulator cylinder portion 13 and the sliding member 6, descends relative to the cylinder portion 5a, and the increased internal pressure of the pump chamber C2 holds the pressure-accumulator opening / closing portion 17 in the open state (the state shown in FIG. 2 ), allowing the contents 4 to continue to be forcefully discharged. When the discharge of the contents 4 is completed, the internal pressure of the pump chamber C2 decreases, causing the pressure-accumulator opening / closing portion 17 to close. When the operation is released, with the pressure-accumulator opening / closing portion 17 closed, the biasing force of the holding member biasing portion 16 causes the holding member 7 to ascend relative to the cylinder portion 5a toward its initial position, decreasing the internal pressure of the pump chamber C2, allowing the contents 4 to be sucked into the pump chamber C2 from the upstream side. Thus, according to the above configuration, pressure is first accumulated by the pressure accumulator cylinder section 13 and pressure accumulator sliding member 14 on the side with the smaller cross-sectional area during operation, so that a light operation can achieve a powerful discharge of the contents 4 from the start. Further, the cylinder section 5a and sliding member 6 on the side with the larger cross-sectional area are used for subsequent discharge, so that the cylinder stroke can be prevented from becoming long even when designed to obtain a large discharge amount.

[0026] The holding member 7 has a finger-type push-down head 7b that has a discharge port C1 and is pressed down by a finger. The dispenser 2 has a support member 18 that is attached to the upper end of the cylinder portion 5a and supports the lower end of the holding member biasing portion 16. With the above configuration, when the above-described two-stage pressure accumulation type dispenser 2 is pressed down with a finger, the height of the push-down head 7b is reduced, making it easier to apply force and improving operability. Note that the push-down head 7b is not limited to the finger type. Furthermore, the holding member 7 is not limited to a configuration that has a push-down head 7b.

[0027] In this embodiment, the pressure accumulator opening / closing section 17 is made up of the pressure accumulator sliding member 14, a pressure accumulator biasing section 17a (compression spring) that biases the pressure accumulator sliding member 14 downward, and a pressure accumulator seating section 7a of the retaining member 7 on which the pressure accumulator sliding member 14 is seated, and the pressure accumulator sliding member 14 rises from a state in which it is seated on the pressure accumulator seating section 7a against the biasing force from the pressure accumulator biasing section 17a due to an increase in the internal pressure of the pump chamber C2, and moves away from the pressure accumulator seating section 7a, thereby opening the pressure accumulator opening / closing section 17, but the configuration of the pressure accumulator opening / closing section 17 is not limited to this.

[0028] The fitting and holding portion 12e of the attachment cap 12 includes an outer cylindrical portion 12e1 extending downward from the top wall 12a radially inward of the seal tube 12d, and an inner cylindrical portion 12e2 extending downward from the top wall 12a radially inward of the outer cylindrical portion 12e1. The extension cylindrical portion 5c of the cylinder member 5 is sandwiched between the outer cylindrical portion 12e1 and the inner cylindrical portion 12e2. The cylinder member 5 includes a flange-shaped protrusion 5f extending radially outward from a vertically intermediate portion of the extension cylindrical portion 5c along the entire circumference. The protrusion 5f has a facing surface 5f1 on its underside that faces the stepped surface 3a1 of the mouth portion 3a. If the fitting and holding portion 12e becomes disengaged due to an external impact or the like, the facing surface 5f1 of the protrusion 5f can be received by the stepped surface 3a1 of the mouth portion 3a, thereby holding the cylinder member 5.

[0029] The support member 18 has a retaining portion 18a that prevents the sliding member 6 from slipping out upward from the inside of the cylinder portion 5a, a flange-shaped protrusion 18b that extends radially outward from the retaining portion 18a, and a support portion 18c that supports the lower end of the holding member biasing portion 16 radially inward from the protrusion 18b, and the mounting cap 12 has an upper annular wall 12f that extends radially inward from the lower end of the inner tube portion 12e2, and a guide tube 12g that extends upward from the inner peripheral edge of the upper annular wall 12f and guides the lifting and lowering movement of the holding member 7, and the protrusion 18b of the support member 18 is arranged between the upper annular wall 12f of the mounting cap 12 and the annular wall 5b of the cylinder member 5 located below it.

[0030] The outside air introduction path P introduces outside air into the container main body 3 by passing it in this order between the push-down head 7b and the inner cylinder part 12e2, the upper annular wall 12f, and the guide cylinder 12g of the mounting cap 12, between the pressure accumulation cylinder part 13 and the support member 18, through the vent hole 5a1, the air chamber P1, and between the seating part 10b and the outside air introduction valve body 9b.

[0031] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be variously modified without departing from the gist of the present invention.

Explanation of Reference Numerals

[0032] 1 Discharge container 2 Discharger 3 Container main body 3a Mouth part 3a1 Step surface 3b Barrel part 3c Bottom part 4 Contents 5 Cylinder member 5a Cylinder part 5a1 Vent hole 5b Annular wall 5c Extension cylinder part 5d Connection cylinder part 5e Valve receiving part 5f Projection 5f1 Opposing surface 6 Sliding member 7 Holding member 7a Pressure accumulation seating part 7b Push-down head 8 Unit for both upright and inverted use 9 Outside air introduction valve member 9a Valve body support part 9b Outside air introduction valve body 10 Air chamber forming member 10a Fitting part 10b Seating part 10c Bottom wall 10d Outer peripheral wall 10e Contact wall 10e1 Contact part 10f Connecting wall 10f1 Intermittent part 10g vertical rib 11 Transfer valve 12 Mounting cap 12a Ceiling wall 12b Outer wall 12c female thread 12d seal tube 12e Fitting holding part 12e1 Outer cylinder 12e2 Inner cylinder part 12f Upper annular wall 12g guide tube 13 Accumulator cylinder section 14 Pressure storage sliding member 15 Connection 16 Holding member biasing portion 17 Accumulator opening and closing section 17a Accumulated pressure section 18 Support member 18a Retaining part 18b Protrusion 18c Support part C Internal flow path C1 outlet C2 Pump Room C3 Lower intake port C4 Upper intake port C5 Intake port O center axis P Outside air intake route P1 air chamber

Claims

1. A dispenser that is attached to the mouth of a container body and dispenses the contents of the container body to the outside in response to an operation, a cylinder member having a cylinder portion, an annular wall extending radially outward from an upper end of the cylinder portion around the entire circumference, and an extension tubular portion extending upward from an outer peripheral edge of the annular wall; a sliding member that slides within the cylinder portion; a holding member having a discharge port and moving up and down relative to the cylinder portion together with the sliding member in response to the operation; an internal flow path that sends and discharges the content to the discharge port through a pump chamber defined by the cylinder portion and the sliding member in response to the lifting and lowering movement of the holding member; a normal / inverted unit having a lower suction port and an upper suction port provided above the lower suction port, wherein in an upright position, the lifting and lowering movement of the holding member causes the contents in the container body to flow from the lower suction port serving as an inlet of the internal flow path toward the pump chamber, and in an inverted position, the lifting and lowering movement of the holding member causes the contents in the container body to flow from the upper suction port serving as an inlet of the internal flow path toward the pump chamber; an outside air introduction path having an air vent provided in the cylinder portion, and introducing outside air into the container body through the air vent in response to the lifting and lowering movement of the holding member; an outside air introduction valve member including a valve body support portion that is fitted to an outer peripheral surface of the cylinder portion below the vent hole and is held thereon, and an outside air introduction valve body that extends radially outward from the valve body support portion over the entire circumference; an air chamber forming member having a fitting portion that fits into the outer peripheral surface of the extension cylindrical portion and a seating portion on which the outside air introduction valve body is seated; the air chamber forming member and the outside air introduction valve member are respectively assembled to the cylinder member from below, the outside air introduction path has an air chamber formed between the vent port and the seat portion by the air chamber forming member, the cylinder portion, the annular wall, and the outside air introduction valve member, The outside air introduction valve body prevents the contents from leaking into the outside air introduction path when the contents are ejected in the inverted position by sitting on the seating portion, and allows the outside air to be introduced into the container body by moving away from the seating portion when the outside air is introduced through the outside air introduction path.

2. The dispenser has an attachment cap including an annular top wall, an outer peripheral wall portion extending downward from the outer peripheral edge of the top wall around the entire circumference, a female screw portion provided on the inner peripheral surface of the outer peripheral wall portion and screwed into the outer peripheral surface of the mouth portion, a seal tube extending downward from the top wall and in close contact with the inner peripheral surface of the mouth portion, and a fitting retainer portion provided on the inner peripheral edge of the top wall, The dispenser according to claim 1 , wherein the extension tubular portion is held by being fitted into the fitting-and-holding portion.

3. The dispenser according to claim 1 , wherein the air chamber forming member has an abutting portion that abuts against an upper surface of the valve body support portion of the outside air introduction valve member.

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