JP2022131498A - Discharge device - Google Patents

Abstract

To provide a discharge device which enables reduction of environmental burdens and enables easy disposal by a user.SOLUTION: A discharge device 1 includes: a stem 21 disposed at the inner side of a mouth A1 of a container body A so as to be movable downward in a state that the stem 21 is biased upward; a cylindrical cylinder 23 into which the stem 21 is inserted; a piston 22 which is linked to vertical movement of the stem 21 in the cylinder 23 and fitted in an inner peripheral surface of the cylinder 23 so as to be slidable vertically; a biasing member 25 which encloses the stem 21 from the radial outer side, biases the stem 21 upward, and is made of a synthetic resin; and a push-down head 5 attached to an upper end part of the stem 21 and having a nozzle hole 54a which discharges a content fluid. The push-down head 5 includes: an inner cylinder part 53 which engages with the stem 21; and an outer cylinder part 52 which covers the inner cylinder part 53 from the radial outer side. The biasing member 25 is disposed between the outer cylinder part 52 and the cylinder 23.SELECTED DRAWING: Figure 1

Description

The present invention relates to dispensers.

Conventionally, as shown in Patent Document 1 below, for example, a stem is disposed inside the mouth of a container so as to be movable downward in an upwardly biased state; a cylindrical cylinder into which the stem is inserted; A piston, which is linked to the vertical movement of the stem in the cylinder and is fitted to the inner peripheral surface of the cylinder so as to be vertically slidable, and a push-down head, which is attached to the upper end of the stem and has a nozzle hole for discharging the content liquid. are known.
In general, the biasing member that biases the stem upward is made of metal material.

JP 2016-123927 A

However, from the viewpoint of reducing the environmental load and facilitating disposal by the user, the discharger is required not to use a biasing member made of a metal material.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dispenser that reduces the environmental load and facilitates disposal by the user.

<1> A dispenser according to an aspect of the present invention comprises: a stem disposed inside a mouth portion of a container body so as to be movable downward in an upward biased state; and a tubular cylinder into which the stem is inserted. a piston which is linked to the vertical movement of the stem within the cylinder and is fitted to the inner peripheral surface of the cylinder so as to be vertically slidable; and a push-down head attached to the upper end of the stem, the push-down head having a nozzle hole for ejecting the content liquid. The push-down head is an inner cylindrical portion that engages with the stem. and an outer cylinder portion that covers the inner cylinder portion from the outside in the radial direction, and the biasing member is arranged between the outer cylinder portion and the cylinder.

In this dispenser, when the push-down head is pushed down and the stem and the piston are lowered, the biasing member is pushed down by the outer cylindrical portion of the push-down head. When the depression of the push head is released, the biasing member is restored and deformed, pushing up the stem, the piston and the push head.
Since the urging member is made of a synthetic resin material, environmental load can be reduced. Further, for example, a dispenser in which all members are made of synthetic resin material can be realized. As a result, when disposing of the dispenser, it is possible to eliminate the need to separate the biasing member from other members made of synthetic resin material. Therefore, facilitation of disposal by the user can be realized.
A biasing member is positioned between the barrel of the push head and the cylinder. Therefore, for example, the size of the biasing member in the radial direction can be ensured compared to the case where the biasing member is arranged between the inner cylindrical portion of the pressing head and the cylinder. This facilitates the design and manufacture of the biasing member.

<2> In the dispenser according to <1> above, at least the stem, the cylinder, and the piston constitute a pump module, and the push-down head is attached to the upper end of the stem in the pump module. may be adopted.

A hold down head is attached to the upper end of the stem in the pump module. Therefore, for example, when this dispenser is applied to a plurality of products of different types, it is possible to use a common pump module and appropriately change the push-down head and the like according to the product.

<3> In the dispenser according to <1> or <2> above, the biasing member may be formed integrally with the outer cylindrical portion or the cylinder.

A biasing member is integrally formed with the barrel or cylinder. That is, the biasing member and the depression head or cylinder are formed by one molding. Therefore, an increase in the number of parts can be suppressed.

<4> The dispenser according to any one of <1> to <3> above includes a capped cylindrical mounting cap for mounting the cylinder to the mouth, wherein the mounting cap is attached to the mounting cap. A configuration including a guide tube extending upward from the top wall and having the biasing member disposed therein may be employed.

A biasing member is positioned inside the guide tube. Therefore, the urging member can be hidden by the guide cylinder, and the appearance can be secured. Moreover, when the biasing member is pushed down by the outer cylindrical portion, it is possible to prevent the biasing member from being unintentionally deformed in the radial direction. Thereby, the ejection operation of the ejector can be stabilized.

ADVANTAGE OF THE INVENTION According to this invention, while environmental load reduction is carried out, facilitation of disposal by a user is realizable.

1 is a longitudinal sectional view of a dispenser according to a first embodiment of the invention; FIG. FIG. 2 is a vertical cross-sectional view of a main part of the ejector shown in FIG. 1; FIG. 2 is a longitudinal sectional view of a pump module that constitutes the dispenser shown in FIG. 1; FIG. 5 is a vertical cross-sectional view of a dispenser according to a second embodiment of the invention;

(First embodiment)
A first embodiment of a discharger according to the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 to 3, the dispenser 1 of this embodiment includes a pump module 2 having a stem 21, a push-down head 5 attached to the stem 21, and a container containing the liquid content. and a mounting cap 7 to be mounted on the mouth A1 of the body A.
All the parts constituting the ejector 1 are made of synthetic resin material.

Stem 21 and mounting cap 7 are arranged coaxially with a common axis. Hereinafter, this common axis will be referred to as a central axis O, along which the pressing head 5 side will be referred to as the upper side, and the bottom side (not shown) of the container body A will be referred to as the lower side. Further, the direction along the central axis O is called the vertical direction, the direction crossing the central axis O as seen from the vertical direction is called the radial direction, and the direction around the central axis O is called the circumferential direction.

The container body A is formed in a cylindrical shape with a bottom, and a male screw is formed on the outer peripheral surface of the mouth portion A1. The container body A is arranged coaxially with the central axis O. As shown in FIG.
The mounting cap 7 is formed in a truncated tubular shape having an annular top wall and a peripheral wall. A stem 21 is inserted inside the ceiling wall of the mounting cap 7 so as to be vertically movable. A female thread is formed on the inner peripheral surface of the peripheral wall of the mounting cap 7 to be screwed with the male thread of the mouth portion A1. In addition, the peripheral wall of the mounting cap 7 may be, for example, undercut-fitted to the opening A1. The mounting cap 7 further includes a guide cylinder 73 projecting upward from the top wall. The guide tube 73 is arranged coaxially with the central axis O. As shown in FIG.

The pump module 2 has a stem 21 , a piston guide 40 , a piston 22 , a cylinder 23 , a lower valve body 24 and a packing 9 .

The cylinder 23 is formed in a bottomed cylindrical shape having an annular bottom wall and a peripheral wall, and is arranged coaxially with the central axis O. As shown in FIG. A downwardly extending mounting tube 27 is provided on the inner peripheral edge of the bottom wall of the cylinder 23 . The mounting tube 27 is fitted with the upper end of a suction tube 28 (pipe). A lower end opening of the suction tube 28 is positioned inside the bottom of the container body A (not shown).
A fixed flange portion 29 that protrudes radially outward and extends in the circumferential direction is formed at the upper end portion of the peripheral wall of the cylinder 23 . The fixed flange portion 29 is arranged at the upper opening edge of the mouth portion A1 of the container body A with the packing 9 interposed therebetween. The lower surface of the ceiling wall of the mounting cap 7 is arranged on the upper surface of the fixed flange portion 29 . A lower valve body 24 is provided in the lower end portion of the peripheral wall of the cylinder 23 .

The lower valve body 24 has a fitting cylinder 31 , a valve body 32 and a connecting piece 33 .
The fitting tube 31 is fitted inside the lower end portion of the peripheral wall of the cylinder 23 . The valve body 32 is formed in a plate-like shape and is seated on the peripheral edge of the opening on the upper surface of the bottom wall of the cylinder 23 to close the inner side of the bottom wall of the cylinder 23 . The valve body 32 is connected to the inner peripheral surface of the fitting tube 31 via an elastically deformable connecting piece 33 . The valve body 32 is elastically displaced in the vertical direction as the connecting piece 33 is elastically deformed.
The lower valve element 24 functions as a check valve that keeps the inside of the bottom wall of the cylinder 23 closed when the inside of the cylinder 23 is pressurized, and opens the inside of the bottom wall of the cylinder 23 when the inside of the cylinder 23 is decompressed. It's becoming As a result, the lower valve body 24 prevents the content liquid in the cylinder 23 from returning to the container body A through the inside of the bottom wall of the cylinder 23 when the cylinder 23 is pressurized, while when the cylinder 23 is depressurized, The content liquid in the container body A is caused to flow into the cylinder 23 through the inside of the bottom wall of the cylinder 23 .

The stem 21 is erected on the mouth portion A1 so as to be movable downward while being biased upward. The stem 21 is cylindrically formed. A lower end portion 21 a of the stem 21 is accommodated within the cylinder 23 . A lower end portion 21a of the stem 21 has a larger diameter than a portion of the stem 21 located above the lower end portion 21a. The upper portion of the stem 21 is located above the upper end opening of the cylinder 23 .

The piston guide 40 is attached to the stem 21 from below. The piston guide 40 is formed in a cylindrical shape with a bottom. The upper end of the piston guide 40 is fitted into a portion of the stem 21 located above the lower end 21a. A communication hole 34 is formed through the piston guide 40 in the radial direction. The piston guide 40 is formed with a pedestal portion 35 protruding radially outward. The pedestal portion 35 is formed in a portion of the piston guide 40 located below the communication hole 34 . The pedestal portion 35 supports the piston 22 from below the piston 22 .

The piston 22 has an outer cylinder 38 , an inner cylinder 37 and a connecting plate 39 .
The outer cylinder 38 is formed in a cylindrical shape and provided coaxially with the central axis O. As shown in FIG. The outer cylinder 38 is fitted in the cylinder 23 so as to be vertically slidable. A through-hole is formed in the cylinder 23 so as to radially face the outer cylinder 38 .
The inner cylinder 37 is formed in a cylindrical shape and provided coaxially with the central axis O. As shown in FIG. A lower end portion of the inner cylinder 37 is separably seated on the pedestal portion 35 of the piston guide 40 . As a result, the inner cylinder 37 switches communication between a portion of the cylinder 23 located below the piston 22 (hereinafter referred to as a lower chamber 23 a ) and the communication hole 34 of the piston guide 40 and disconnection thereof. Such a piston guide 40 functions as an upper valve body in the pump module 2 . The upper portion of the inner cylinder 37 is fitted into the lower end portion 21a of the stem 21 so as to be vertically slidable.
The connecting plate 39 connects the inner peripheral surface of the outer cylinder 38 and the outer peripheral surface of the inner cylinder 37 and extends continuously over the entire length in the circumferential direction. The upper surface of the connecting plate 39 faces the lower opening edge (lower end portion 21a) of the stem 21 with a vertical gap therebetween.

The pressing head 5 is formed in a capped tubular shape having a top wall portion 51 and an outer tubular portion 52 and is arranged coaxially with the central axis O. As shown in FIG. The outer tube portion 52 is provided radially inside the guide tube 73 of the mounting cap 7 . The lower end portion of the outer cylinder portion 52 is located below the upper end portion of the guide cylinder 73 .
The pressing head 5 includes a mounting cylinder portion 53 (inner cylinder portion) projecting downward from the top wall portion 51 and a nozzle cylinder extending radially outward from the mounting cylinder portion 53 and penetrating the outer cylinder portion 52 in the radial direction. and ribs 55 extending downwardly from the top wall portion 51 . A nozzle hole 54 a that opens in the radial direction is formed at the tip of the nozzle cylinder portion 54 . The inside of the nozzle tube portion 54 communicates with the mounting tube portion 53 . The mounting cylinder portion 53 is arranged coaxially with the central axis O. As shown in FIG. The mounting cylinder portion 53 is covered from the outside in the radial direction by the outer cylinder portion. A lower end portion of the mounting tubular portion 53 is located above a lower end portion of the outer tubular portion 52 . The upper end portion of the stem 21 is fitted to the outside of the mounting tube portion 53 . The mounting cylinder portion 53 is inserted into the stem 21 . The mounting tube portion 53 is locked to the stem 21 . The mounting tube portion 53 and the stem 21 move in conjunction with each other in the vertical direction. A radially inner end portion of the rib 55 is connected to the outer peripheral surface of the mounting tube portion 53 . A radially outer end of the rib 55 is connected to the inner peripheral surface of the outer cylindrical portion 52 . The lower end of the rib 55 is located below the lower end of the nozzle cylinder portion 54 . A plurality of ribs 55 are arranged at intervals in the circumferential direction.

Here, a piston retainer 41 is provided at the upper end of the cylinder 23 . The piston retainer 41 functions as a retainer for parts inside the cylinder 23 such as the piston 22 . The stem 21 is inserted through the piston retainer 41 . The piston retainer 41 is arranged coaxially with the center axis O.
The piston restrainer 41 includes a plate portion 42 , a first cylindrical portion 43 , a second cylindrical portion 44 and a connecting portion 45 . The plate portion 42 is an annular plate whose front and back surfaces face up and down. The outer peripheral portion of the plate portion 42 is arranged on the fixed flange portion 29 . The outer peripheral portion of the plate portion 42 is vertically sandwiched between the fixed flange portion 29 and the mounting cap 7 . The first tubular portion 43 extends downward from the inner peripheral edge of the plate portion 42 . The first tubular portion 43 is fitted inside the upper end portion of the peripheral wall of the cylinder 23 . The first tubular portion 43 is arranged between the upper end portion of the peripheral wall of the cylinder 23 and the lower end portion 21 a of the stem 21 . The second tubular portion 44 is arranged radially inside the first tubular portion 43 . The second cylindrical portion 44 is arranged above the center of the first cylindrical portion 43 in the vertical direction. The second tubular portion 44 is arranged above the lower end portion 21 a of the stem 21 . The connecting portion 45 connects the first tubular portion 43 and the second tubular portion 44 . The connecting portion 45 is annular. The connecting portion 45 extends radially outward from the lower end of the second tubular portion 44 . A radial outer edge of the connecting portion 45 is connected to the inner peripheral surface of the first tubular portion 43 . An annular gap is provided between the first tubular portion 43 and the second tubular portion 44 .

The biasing member 25 is arranged between the outer tube portion 52 and the cylinder 23 . The biasing member 25 is formed integrally with the outer tube portion 52 or the cylinder 23 . In this embodiment, the biasing member 25 is formed integrally with the outer tube portion 52 . The biasing member 25 and the pressing head 5 are one molded product (injection molded product) made of synthetic resin. The biasing member 25 is formed in a tubular shape as a whole. The biasing member 25 radially surrounds the stem 21 . The biasing member 25 is arranged inside the guide tube 73 .

In the illustrated example, the biasing member 25 includes a plurality of annular bodies 25a and a plurality of connecting bodies 25b. The plurality of annular bodies 25a are arranged in a line at intervals in the vertical direction. The plurality of annular bodies 25a are arranged coaxially with the central axis O. As shown in FIG. Annular bodies 25a adjacent to each other in the vertical direction are connected to each other via connecting bodies 25b. In this embodiment, the biasing member 25 is formed by alternately arranging annular bodies 25a and connecting bodies 25b in the vertical direction. The connecting body 25b elastically connects the vertically adjacent annular bodies 25a. The connecting body 25b includes a plurality of (for example, three) spring pieces 25c arranged at intervals in the circumferential direction. The spring piece 25c is inclined with respect to the central axis O in a front view of the spring piece 25c viewed from the outside in the radial direction. In the connecting bodies 25b adjacent to each other with the annular body 25a interposed therebetween, the directions in which the spring pieces 25c incline are opposite to each other. Of the connecting bodies 25b adjacent to each other with the annular body 25a interposed therebetween, the lower end of the spring piece 25c in the upper connecting body 25b is at the same position in the circumferential direction as the upper end of the spring piece 25c in the lower connecting body 25b. be. Note that the form of the biasing member 25 is not limited to this, and it is possible to employ a form of a known resin spring. For example, the designer may appropriately change the radial thickness (thickness) of the biasing member 25 .

As described above, in this embodiment, the biasing member 25 is formed integrally with the outer cylinder portion 52 . Of the plurality of annular bodies 25 a , the uppermost annular body 25 a is formed by a portion (lower end) of the outer cylindrical portion 52 . That is, the lower end portion of the outer cylindrical portion 52 is the uppermost annular body 25a. Of the plurality of annular bodies 25a, the lowest annular body 25a is supported by the inner peripheral edge of the top wall of the mounting cap 7. As shown in FIG. In this embodiment, the biasing member 25 is arranged between the outer cylindrical portion 52 and the cylinder 23 via the mounting cap 7 (top wall of the mounting cap 7).

Next, the action of the above-described ejector 1 shown in FIG. 1 will be described.

When the pressing head 5 is pushed down, the biasing member 25 is pushed down between the pressing head 5 and the mounting cap 7 (cylinder 23) while the stem 21 is lowered, and the biasing member 25 is elastically compressed and deformed in the vertical direction. be done. At this time, the seal between the pedestal portion 35 of the piston guide 40 and the inner cylinder 37 of the piston 22 is released, and the lower chamber 23a in the cylinder 23 and the communication hole 34 of the piston guide 40 communicate with each other. When the push-down head 5 is further pushed down from this state, the bottom opening edge of the stem 21 comes into contact with the upper surface of the connecting plate 39 of the piston 22 , and the piston 22 moves downward together with the push-down head 5 . As a result, the lower chamber 23 a in the cylinder 23 is pressurized, and the liquid content in the cylinder 23 flows into the vertical gap between the base portion 35 and the piston 22 , the communication hole 34 , the stem 21 , and the mounting cylinder portion 53 . It passes through the inside and the inside of the nozzle tube portion 54 in this order, and is discharged from the nozzle hole 54a. At this time, the valve main body 32 of the lower valve body 24 is kept in a state of being seated on the opening peripheral portion on the upper surface of the bottom wall of the cylinder 23 .

After that, when the depression of the pressing head 5 is released, the pressing head 5 is restored upward together with the stem 21 by the upward biasing force of the biasing member 25 . In this process, the pedestal portion 35 of the piston guide 40 abuts against the piston 22 from below the piston 22, sealing the gap between the pedestal portion 35 and the inner cylinder 37, thereby creating a lower chamber 23a in the cylinder 23, When the communication between the communication hole 34 of the piston guide 40 and the communication hole 34 of the piston guide 40 is blocked, and the piston 22 continues to move upward together with the pressing head 5, the pressure in the lower chamber 23a in the cylinder 23 is reduced, and the valve body in the lower valve body 24 is decompressed. 32 elastically deforms the connecting piece 33 and separates upward from the peripheral edge of the opening on the upper surface of the bottom wall of the cylinder 23, so that the liquid inside the container body A flows into the cylinder 23 through the suction pipe 28. influx.

As described above, according to the discharger 1 according to the present embodiment, the biasing member 25 is made of a synthetic resin material, so that environmental load can be reduced. Furthermore, for example, it is possible to realize the dispenser 1 in which all the members are made of synthetic resin material. As a result, when disposing of the dispenser 1, it is possible to eliminate the need to separate the biasing member 25 from other members made of synthetic resin material. Therefore, facilitation of disposal by the user can be realized.
A biasing member 25 is arranged between the outer tubular portion 52 of the depression head 5 and the cylinder 23 . Therefore, for example, compared to the case where the biasing member 25 is arranged between the mounting tube portion 53 of the pressing head 5 and the cylinder 23, it is possible to secure the radial size of the biasing member 25. can. This facilitates design and manufacture of the biasing member 25 . Specifically, for example, the repulsive force (elastic force) of the biasing member 25 can be increased by increasing the size (thickness) of the spring pieces 25c in the circumferential direction or by increasing the number of the spring pieces 25c. In addition, by widening the interval between the spring pieces 25c adjacent in the circumferential direction, it is possible to facilitate removal of the mold from the biasing member 25 during molding.

A biasing member 25 is arranged inside the guide tube 73 . Therefore, the urging member 25 can be hidden by the guide tube 73, and the appearance can be secured. In addition, when the biasing member 25 is pushed down by the outer cylindrical portion 52, it is possible to prevent the biasing member 25 from being unintentionally deformed in the radial direction. As a result, the discharge operation of the discharger 1 can be stabilized. In addition, as a form of unintended deformation of the biasing member 25 in the radial direction, for example, among the plurality of annular bodies 25a, the annular body 25a located in the center in the vertical direction may (a mode in which the biasing member 25 as a whole is deformed into a doglegged shape).

The biasing member 25 is formed integrally with the outer tube portion 52 . That is, the biasing member 25 and the pressing head 5 are formed by one molding. Therefore, an increase in the number of parts can be suppressed.

A push head 5 is attached to the upper end of the stem 21 in the pump module 2 . Therefore, for example, when the dispenser 1 is applied to a plurality of products of different types, the pump module 2 can be used in common while the push-down head 5 and the mounting cap 7 can be appropriately changed according to the product. .

(Second embodiment)
Next, a dispenser according to a second embodiment of the invention will be described with reference to FIG.
In the second embodiment, the same reference numerals are assigned to the same components as in the first embodiment, the description thereof is omitted, and only the different points will be described.

In the dispenser 1A according to this embodiment, the cylinder 23 and the biasing member 25 are integrally formed. The cylinder 23 and the biasing member 25 are one molded product (injection molded product) made of synthetic resin.
In this embodiment, in the mounting cap 7 , the guide tube 73 extends upward from the inner peripheral edge of the top wall, and the top wall does not protrude radially inward beyond the guide tube 73 . The biasing member 25 extends upward from a fixed flange portion 29 on the cylinder 23 . A lower end portion of the urging member 25 (an annular body 25 a located on the lowest side among the plurality of annular bodies 25 a ) is integral with the fixed flange portion 29 . The piston retainer 41 is not sandwiched between the fixed flange portion 29 and the mounting cap 7 . The piston retainer 41 is positioned radially inside the biasing member 25 .
The upper end portion of the urging member 25 (annular body 25a positioned most vertically among the plurality of annular bodies 25a) is in contact with the lower end of the outer cylindrical portion 52 of the pressing head 5 from below.
In addition to the stem 21 , the piston guide 40 , the piston 22 , the cylinder 23 , the lower valve body 24 and the packing 9 , the pump module 2 includes the biasing member 25 in this embodiment.
In this embodiment, the biasing member 25 is formed integrally with the fixed flange portion 29 of the cylinder 23, but the biasing member 25 is formed integrally with the piston retainer 41 of the cylinder 23. may

As described above, according to the discharger 1A according to this embodiment, the biasing member 25 is integrally formed with the cylinder 23 . That is, the biasing member 25 and the cylinder 23 are formed by one molding. Therefore, an increase in the number of parts can be suppressed.
A push head 5 is attached to the upper end of the stem 21 in the pump module 2 . Therefore, for example, when the dispenser 1 is applied to a plurality of products of different types, the pump module 2 can be used in common while the push-down head 5 and the mounting cap 7 can be appropriately changed according to the product. .

The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

All the parts constituting the dispensers 1 and 1A need not be made of synthetic resin.
Pump module 2 may not include packing 9 . For example, the pump module 2 and the packing 9 may be prepared separately, and the packing 9 may be arranged between the pump module 2 and the container A when the pump module is assembled to the container A.

In addition, it is possible to appropriately replace the constituent elements in the above-described embodiment with well-known constituent elements without departing from the spirit of the present invention, and the modifications described above may be combined as appropriate.

1, 1A Discharger 2 Pump module 5 Depression head 52 Outer cylinder part 53 Mounting cylinder part (inner cylinder part)
7 Mounting cap 21 Stem 22 Piston 23 Cylinder 25 Biasing member A Container body A1 Mouth

Claims (4)

a stem arranged inside the opening of the container body so as to be movable downward in an upward biased state;
a tubular cylinder into which the stem is inserted;
a piston linked to the vertical movement of the stem within the cylinder and fitted to the inner peripheral surface of the cylinder so as to be vertically slidable;
a biasing member made of synthetic resin that radially surrounds the stem and biases the stem upward;
a pressing head attached to the upper end of the stem and having a nozzle hole for ejecting the content liquid;
with
The pressing head includes an inner cylindrical portion that engages with the stem, and an outer cylindrical portion that covers the inner cylindrical portion from the outside in a radial direction,
The dispenser, wherein the biasing member is arranged between the outer cylinder and the cylinder. at least the stem, the cylinder and the piston constitute a pump module;
2. The dispenser of claim 1, wherein the push-down head is attached to the upper end of the stem in the pump module. 3. The dispenser according to claim 1, wherein said biasing member is formed integrally with said outer cylindrical portion or said cylinder. A capped cylindrical mounting cap for mounting the cylinder to the mouth,
4. The dispenser according to any one of claims 1 to 3, wherein said mounting cap extends upward from a top wall of said mounting cap and includes a guide cylinder in which said biasing member is arranged.

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