JP2023096262A - ejector - Google Patents

Abstract

An object of the present invention is to prevent the storage space from communicating with the inside of the container body through the supply hole when the pressure in the storage space is positive.
A cylinder (11) having a storage space (A), a discharge head (14) formed with a discharge hole (25), a piston (15) formed with a supply hole (26), and an attachment that supports the piston so as to be movable upward in a downwardly biased state. A force member 16, a lower valve body 17 that closes the supply hole and opens the supply hole when the pressure in the storage space is negative, and an operation lever 18 that is inserted into a portion of the cylinder positioned outside the storage space and pushes up the piston. In the piston, a valve seat surface 31a extending downward toward the supply hole is formed on the periphery of the opening of the supply hole in the portion defining the inner surface of the storage space, and the lower valve body is the valve It is a sphere that is seated on the seat so that it can be separated upward.
[Selection drawing] Fig. 1

Description

The present invention relates to dispensers.

Conventionally, as shown in Patent Document 1 below, for example, a container body has a storage space in which contents are stored, and a vertically extending cylinder and a discharge hole for discharging the contents from the storage space are formed. a discharge head, a piston fitted in the cylinder so as to be vertically slidable, and having a supply hole that closes the lower end opening of the storage space and penetrates in the vertical direction and communicates with the container body; a biasing member that supports the piston so that it can move upward in a downwardly biased state; a lower valve body that closes the supply hole and opens the supply hole when the pressure in the storage space is negative; an operation lever inserted into the portion to push up the piston, and the lower valve body is seated upwardly and separably on the peripheral edge of the opening of the supply hole in the portion defining the inner surface of the storage space in the piston. Dispensers with valve seat surfaces are known.

JP 2021-24586 A

However, in the above-described conventional dispenser, when solid additives and solid foreign matter (hereinafter collectively referred to as solid matter) are to be discharged together with the contents, the valve seat surface and the lower portion of the reservoir space are at a positive pressure. There is a possibility that the storage space may communicate with the container body through the supply hole due to the solid matter sandwiched between the valve body and the valve body. Note that the solid foreign matter includes, for example, dust and the like that enter the container body from the outside when refilling the contents.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dispenser that can prevent the storage space from communicating with the container body through the supply hole when the pressure in the storage space is positive. With the goal.

The present invention employs the following means to solve the above problems. That is, the dispenser of the present invention has a storage space in which the contents in the container body are stored, a cylinder extending in the vertical direction, and a discharge head formed with a discharge hole for discharging the contents from the storage space. a piston fitted in the cylinder so as to be slidable in the vertical direction, closing the opening of the lower end of the storage space, and having a supply hole penetrating in the vertical direction and communicating with the container body; a biasing member that supports the piston so that it can move upward in a downwardly biased state; a lower valve body that closes the supply hole and opens the supply hole when the pressure in the storage space is negative; and the storage space in the cylinder. and an operation lever that is inserted into a portion located outside of the piston and pushes up the piston, wherein the piston has an opening peripheral edge portion of the supply hole in a portion defining the inner surface of the storage space, and is attached to the supply hole. A valve seat surface extending downward is formed, and the lower valve body is a spherical body seated on the valve seat surface so as to be able to move upward.

According to the present invention, when the operation lever is operated to raise the piston against the downward biasing force of the biasing member, the pressure in the storage space becomes positive, and the lower valve body is pressed against the valve seat surface. Then, the supply hole is kept closed, and the content in the storage space is discharged from the discharge hole.
When the operating lever is released, the piston is restored downward by the biasing member, the pressure inside the storage space becomes negative, the lower valve element moves upward from the valve seat surface, the supply hole is opened, and the inside of the container body is opened. Contents are supplied into the storage space through the supply holes.
The valve seat surface extends downward toward the supply hole, and the lower valve body is a spherical body seated on the valve seat surface so as to be able to move upward, so that the solid matter does not flow from the valve seat surface to the supply hole. In addition, the contact area between the lower valve body and the valve seat surface can be suppressed, and the surface pressure between the lower valve body and the valve seat surface can be increased. From the above, even if solid matter tries to accumulate between the lower valve body and the valve seat surface, when the pressure in the storage space is positive, the solid matter is pushed away by the outer peripheral surface of the lower valve body and the outer periphery of the lower valve body is pushed away. The surface can be brought into contact with the valve seat surface over the entire circumference. Therefore, when the pressure in the storage space is positive, it is possible to prevent the storage space from communicating with the inside of the container body through the supply hole.
Since the lower valve body is a spherical body that is seated on the valve seat surface so that it can move upward, it is possible to move the lower valve body far away from the valve seat surface when the pressure inside the storage space is negative. , the contents in the container body can be stably supplied into the storage space through the supply hole.

The piston includes a bottomed cylindrical lower cylinder portion, the supply hole and the valve seat surface are formed in the bottom wall of the lower cylinder portion, and the piston has a valve seat spaced apart upward from the valve seat surface. A retainer protrusion may be provided to prevent the lower valve body from coming out of the lower tubular portion due to the collision of the lower valve body.

Since the piston is provided with a retaining projection, it is possible to move the lower valve body up and down only in the lower cylindrical part, and when the pressure in the storage space is negative, there is no gap between the lower valve body and the valve seat surface. The distance is stabilized, and the amount of contents in the container body supplied into the storage space through the supply hole can be stabilized.

The lower valve body may be made of a material having a higher specific gravity than the material forming the piston.

Since the lower valve body is made of a material having a higher specific gravity than the material forming the piston, the contact pressure between the lower valve body and the valve seat surface can be reliably increased.

According to this invention, when the pressure in the storage space is positive, it is possible to prevent the storage space from communicating with the inside of the container body through the supply hole.

1 is a vertical cross-sectional view of a dispenser of one embodiment; FIG. FIG. 2 is a view showing a state in which a piston is raised in the dispenser of FIG. 1;

An embodiment of the dispenser will be described below with reference to the drawings.
As shown in FIG. 1, the discharger 1 includes a cylinder 11, a closing wall 12, a discharge valve 13, a discharge head 14, a piston 15, a biasing member 16, a lower valve body 17, and an operating lever. 18, and is attached via the mounting cap C to the mouth portion W1 of the container body W filled with contents. Note that the discharger 1 does not have to include the closing wall 12 and the discharge valve 13 .

The contents are preferably liquid laundry detergents, softeners, liquid detergents for automatic dishwashers, or various liquid products containing powder, for example. The discharge head 14, the discharge valve 13, the closing wall 12, the operating lever 18, the mounting cap C, and the cylinder 11 are made of polypropylene, for example, the piston 15 is made of polyethylene, the biasing member 16, and the lower valve body. 17 is made of, for example, a metal material. Incidentally, the biasing member 16 and the lower valve body 17 may be made of a synthetic resin material.

Cylinder 11, piston 15, and biasing member 16 are arranged coaxially with common axis O. As shown in FIG. Hereinafter, the direction along the common axis O will be referred to as the vertical direction, the direction that crosses the common axis O as viewed from the vertical direction will be referred to as the radial direction, and the direction that rotates around the common axis O will be referred to as the circumferential direction.

The cylinder 11 is formed in a tubular shape extending in the vertical direction. The cylinder 11 has a storage space A in which contents are stored. The material of the cylinder 11 is preferably polypropylene, for example.
The cylinder 11 includes a main tube 21 having a cylindrical shape with a bottom, and a supply tube 22 having a diameter smaller than that of the main tube 21 and penetrating the bottom wall of the main tube 21 in the vertical direction. The storage space A is positioned above the mouth W1.
The body tube 21 protrudes upward from the mouth portion W1. A lower end portion of the main tube 21 is inserted into the opening W1. A flange portion protruding radially outward is formed on the main tube 21, and the flange portion is vertically sandwiched between the upper opening edge of the mouth portion W1 of the container main body W and the mounting cap C. , the dispenser 1 is fixed to the mouth W1.
The upper portion of the supply tube 22 protrudes upward from the bottom wall of the main tube 21 . The upper portion of the supply tube 22 is positioned below the upper end portion of the main tube 21 . A vertical groove 22 b is formed in the inner peripheral surface of the upper portion of the supply tube 22 so as to extend continuously over the entire length in the vertical direction. A lower portion of the supply tube 22 protrudes downward from the bottom wall of the main tube 21 . The diameter of the upper portion of the supply tube 22 is larger than the diameter of the lower portion of the supply tube 22 . An outside air introduction hole 22 a that communicates the inside of the supply tube 22 with the inside of the container body W is formed in the connection portion of the supply tube 22 with the bottom wall of the main tube 21 .

The closing wall 12 closes the upper end opening of the storage space A. As shown in FIG. The material of the blocking wall 12 is preferably polypropylene, for example. An outer fitting tube 24 extending downward and fitted onto the body tube 21 of the cylinder 11 is formed on the outer peripheral edge of the closing wall 12 . The outer fitting tube 24 is formed in a double tube shape with its lower ends connected to each other and its upper end open.
The blocking wall 12 is formed with an outflow hole 23 that penetrates in the vertical direction and communicates with the storage space A. As shown in FIG. The outflow hole 23 is arranged coaxially with the common axis O. As shown in FIG. A first valve seat surface 23a is formed on the inner peripheral surface of the outflow hole 23 so that the inner diameter of the outflow hole 23 increases upward. The first valve seat surface 23a is formed on the upper portion of the inner peripheral surface of the outflow hole 23, and the lower portion of the inner peripheral surface of the outflow hole 23 extends straight in the vertical direction. A radial central portion (hereinafter referred to as a protruding tube 12b) of the blocking wall 12 is formed in a capped tube shape protruding upward, and an outflow hole 23 is formed in the top wall thereof.

The blocking wall 12 is formed with a topped cylindrical air reservoir 12 a having a bottom surface recessed upward and a top wall located above the outflow hole 23 . It should be noted that it is not necessary to form the air storage portion 12a in the blocking wall 12 .
Air can remain in the upper part of the air reservoir 12a even when the reservoir space A is filled with the contents. When the internal pressure of the storage space A is raised, the air in the air storage portion 12a is compressed, so that the operating load at the initial movement of the operating lever 18 can be reduced.

The ejection head 14 is formed in a capped tubular shape and is fitted into the outer fitting tube 24 . The ejection head 14 covers the upper surface of the blocking wall 12 . The material of the ejection head 14 is preferably polypropylene, for example. The ejection head 14 is formed with an ejection hole 25 for ejecting the contents from the outflow hole 23 . The discharge hole 25 opens toward the opposite side of the common axis O to the side where the air reservoir 12a is located in the radial direction.
Hereinafter, of the radial directions, the direction in which the discharge holes 25 open is referred to as the forward direction, the opposite direction is referred to as the rearward direction, and the direction orthogonal to the front-rear direction when viewed from the vertical direction is referred to as the left-right direction.

The ejection head 14 is formed with a connection tube 14 a that is fitted onto the raised tube 12 b of the blocking wall 12 and communicates with the ejection hole 25 . The connecting cylinder 14a extends downward from the lower surface of the top wall of the ejection head 14. As shown in FIG.
On the lower surface of the top wall of the ejection head 14, a restriction projection 14b projecting downward is formed in a portion positioned inside the connecting cylinder 14a. As shown in FIG. 2, the discharge valve 13 reaches the upper end position and abuts against the restricting projection 14b. The restricting protrusion 14b is formed in a plate shape with front and back surfaces facing the circumferential direction. A plurality of restricting protrusions 14b are provided at intervals in the circumferential direction. The restricting protrusion 14b is connected to the inner peripheral surface of the connecting cylinder 14a. A radially outer portion of the restricting protrusion 14b protrudes downward from a radially inner portion thereof. A radially outer portion of the restricting projection 14b is connected to the connecting cylinder 14a, and a radially inner portion thereof faces the discharge valve 13 in the vertical direction.

The piston 15 is fitted vertically slidably inside the body tube 21 of the cylinder 11 and closes the lower end opening of the storage space A. As shown in FIG. The material of the piston 15 is preferably polyethylene, for example. A supply hole 26 is formed in the piston 15 so as to communicate with the inside of the container body W through the vertical direction. In the piston 15, a second valve seat surface (valve seat surface) 31a extending downward toward the supply hole 26 is formed at the peripheral edge of the opening of the supply hole 26 in the portion defining the inner surface of the storage space A. there is
In the illustrated example, the piston 15 is formed in a multi-stage cylindrical shape whose diameter decreases downward, and the lowest cylindrical portion 31 is formed in a bottomed cylindrical shape. In the piston 15, the sliding cylinder portion 27 that slides on the inner peripheral surface of the cylinder 11 is positioned at the highest position.

An outer seal tube 32 and an inner seal tube 33 extending downward are formed on the bottom wall of the lower tubular portion 31 . The outer seal cylinder 32 surrounds the upper portion of the inner seal cylinder 33 from the outside in the radial direction. The lower portion of the inner seal cylinder 33 is located below the outer seal cylinder 32 . The outer seal cylinder 32 is fitted in the upper part of the supply cylinder 22 so as to be vertically slidable, and the inner seal cylinder 33 is fitted in the lower part of the supply cylinder 22 so as to be vertically slidable.

The supply hole 26 penetrates the bottom wall of the lower cylindrical portion 31 in the vertical direction, and communicates the inside of the container main body W and the inside of the storage space A with each other. The second valve seat surface 31a is formed on the upper surface of the bottom wall of the lower cylindrical portion 31 at the periphery of the opening of the supply hole 26, and extends downward as it extends radially inward. Of the upper surface of the bottom wall of the lower cylindrical portion 31, the outer peripheral edge portion that continues to the outer peripheral edge of the second valve seat surface 31a is a flat surface that faces upward.

The lower valve body 17 closes the supply hole 26 and opens the supply hole 26 when the pressure inside the storage space A is negative. The lower valve body 17 is a spherical body seated on the second valve seat surface 31a so as to be able to move upward. The lower valve body 17 is made of a material having a higher specific gravity than the material forming the piston 15 . The material of the lower valve body 17 is preferably stainless steel or polypropylene, for example. The upper portion of the lower valve body 17 is located above the outer peripheral edge of the upper surface of the bottom wall of the lower tubular portion 31 . The lower valve body 17 is positioned below the upper end of the lower tubular portion 31 .

A support member 34 is provided on the piston 15 . Note that the support member 34 may be formed integrally with the piston 15 . The material of the support member 34 is preferably polypropylene, for example.
The support member 34 includes a topped cylindrical mounting portion 35 fitted in a portion positioned between the sliding cylindrical portion 27 and the lower cylindrical portion 31 in the piston 15, and a top wall 35a of the mounting portion 35. It has a capped tubular guide portion 36 extending upward, and a retainer projection 34a extending downward from the top wall 35a of the mounting portion 35 .

A communication opening penetrating in one of the radial directions is formed in the peripheral wall of each of the mounting portion 35 and the guide portion 36 . In the illustrated example, the communication opening penetrates the peripheral walls of the mounting portion 35 and the guide portion 36 in the left-right direction. A top wall 36a of the guide portion 36 is formed in an annular shape. The inner peripheral edge portion of the top wall 36 a of the guide portion 36 protrudes radially inward from the inner peripheral surface of the peripheral wall of the guide portion 36 .

The retainer projection 34 a is inserted into the lower cylinder portion 31 of the piston 15 . The retainer protrusion 34a has a cross shape when viewed from above and below. A radial gap between the retainer projection 34 a and the inner peripheral surface of the lower cylindrical portion 31 is smaller than the diameter of the lower valve body 17 . The lower valve body 17 that is separated upward from the second valve seat surface 31a abuts against the retaining protrusion 34a, thereby restricting the lower valve body 17 from being detached from the lower cylindrical portion 31. As shown in FIG. Note that the retaining projection 34 a may be positioned above the lower tubular portion 31 . When the lower valve body 17 abuts against the retainer projection 34a, the lower end of the lower valve body 17 and the outer peripheral edge of the bottom wall of the lower cylindrical portion 31 are aligned vertically.

The biasing member 16 supports the piston 15 in a downwardly biased state so as to be movable upward. The biasing member 16 is a coil spring. The material of the biasing member 16 is preferably stainless steel or polyacetal copolymer, for example. The upper end of the biasing member 16 is inserted into the protuberance tube 12b of the blocking wall 12 and abuts against the lower surface of the blocking wall 12. As shown in FIG. A guide portion 36 of the support member 34 is inserted into the lower portion of the biasing member 16 . A lower end portion of the biasing member 16 is in contact with the upper surface of the top wall 35 a of the mounting portion 35 of the support member 34 .

The discharge valve 13 is vertically movable while being inserted into the outflow hole 23 of the blocking wall 12 to open and close the outflow hole 23 . The discharge valve 13 includes a shaft portion 37 and a valve body 38 and is arranged coaxially with the common axis O. As shown in FIG. The discharge valve 13 is formed in a cylindrical shape with a bottom. Note that the discharge valve 13 may be a solid rod body. The material of the discharge valve 13 is preferably polypropylene, for example.

The shaft portion 37 extends vertically and is inserted into the guide portion 36 of the support member 34 so as to be vertically movable. The shaft portion 37 is formed with a locking protrusion 37a that abuts on the inner peripheral edge portion of the top wall 36a of the guide portion 36 from below. The discharge valve 13 is urged downward by the urging member 16 via the locking projection 37a and the guide portion 36. As shown in FIG.

The valve body 38 is provided so as to be able to approach and move away from the first valve seat surface 23a of the closing wall 12 in the vertical direction.
The outer peripheral surface of the valve main body 38 is formed in a conical shape with an outer diameter that increases upward. The outer peripheral surface of the valve main body 38 is provided with a ridge-shaped sealing projection that extends continuously over the entire circumference and contacts the first valve seat surface 23a. A lower end portion of the outer peripheral surface of the valve body 38 is located radially inside the inner peripheral surface of the outflow hole 23 . The lower end portions of the outer peripheral surface of the valve body 38 and the inner peripheral surface of the outflow hole 23 face each other in the radial direction.
An upper end portion of the valve body 38 is provided with an annular projection 39 projecting upward. The upper end opening edge of the annular projection 39 is located above the upper surface of the top wall of the protruding tube 12b in the closing wall 12. As shown in FIG. The upper opening edge of the annular protrusion 39 abuts against the restricting protrusion 14b of the ejection head 14 when the ejection valve 13 is positioned at the raised end position.

The operating lever 18 is inserted into a portion of the cylinder 11 outside the storage space A and pushes up the piston 15 . The material of the operating lever 18 is preferably polypropylene, for example.
In this embodiment, the operating lever 18 is inserted into a portion of the cylinder 11 located below the storage space A, is connected to a push-up portion 42 that pushes up the piston 15, and is connected to the push-up portion 42, and is operated from within the cylinder 11. A projecting lever portion 43 is provided, and the piston 15 moves up and down in a state in which the push-up portion 42 and the piston 15 are engaged with each other as the operation lever 18 rotates about the rotation shaft 42a.

The push-up part 42 is inserted in the front-rear direction into a portion located below the storage space A in the body tube 21 of the cylinder 11 and pushes up the piston 15 . The push-up portion 42 penetrates the rear end portion of the main body tube 21 in the front-rear direction. The push-up portion 42 includes a pair of plate bodies sandwiching the lower cylindrical portion 31 of the piston 15 in the left-right direction. These plates are formed in a rectangular shape with front and back surfaces facing in the left-right direction and elongated in the front-rear direction. The push-up portion 42 abuts on the lower surface of a stepped wall 15 a formed in a portion of the piston 15 located between the sliding tubular portion 27 and the lower tubular portion 31 and facing in the vertical direction. A rotating shaft 42a projecting outward in the left-right direction is formed at each rear end of the pair of plates.
The lever portion 43 connects the pair of plates in the push-up portion 42 in the left-right direction, and protrudes from inside the body tube 21 of the cylinder 11 toward the rear of the outer fitting tube 24 of the blocking wall 12 . The lever portion 43 extends upward toward the rear.

Here, the outer fitting cylinder 24 is formed with a grip portion 44 extending downward toward the rear.
The grip portion 44 includes a pair of side plates 44a that sandwich the lever portion 43 in the left-right direction, and a grip plate 44b that connects the pair of side plates 44a and faces the lever portion 43 from below. A bearing hole into which the rotary shaft 42a of the operating lever 18 is rotatably fitted is formed in the radially inner end portion of the side plate 44a. When pushing the upper surface of the lever portion 43 with the thumb, another finger is placed along the forward facing inner surface of the grip plate 44b.

Next, the action of the ejector 1 will be described.

When the thumb is placed on the upper surface of the lever portion 43 and the other finger is placed along the inner surface of the grip plate 44b, the lever portion 43 is pushed downward around the rotating shaft 42a by the thumb. The lower surface of the stepped wall 15a of the piston 15 is thrust upward. Thereby, as shown in FIG. 2, the piston 15 moves upward in the cylinder 11 while compressing the biasing member 16 in the vertical direction, and the internal pressure of the storage space A increases.

In the above process, the discharge valve 13 moves upward, and the valve body 38 separates upward from the first valve seat surface 23a of the closing wall 12 . As a result, the contents of the storage space A flow out from the outflow hole 23 and are discharged from the discharge hole 25 through the connecting cylinder 14 a of the discharge head 14 . At this time, the outer seal cylinder 32 and the inner seal cylinder 33 are kept fitted in the supply cylinder 22, and the portion of the body cylinder 21 of the cylinder 11 located outside the storage space A is the supply cylinder. 22 communicates with the interior of the container body W through the longitudinal groove 22b and the outside air introduction hole 22a.

When the lever portion 43 is released, the piston 15 is moved downward by the restoring force of the urging member 16, the stepped wall 15a of the piston 15 pushes down the push-up portion 42, and the operating lever 18 rotates around the rotary shaft 42a. .

In the above process, the storage space A expands to a negative pressure, the discharge valve 13 moves downward, the valve main body 38 contacts the first valve seat surface 23a, and the lower valve body 17 moves to the second valve seat surface. It separates upward from 31a. As a result, the supply hole 26 is opened, and the contents in the container main body W are supplied to the storage space A through the supply tube 22 of the cylinder 11 and the supply hole 26 . At this time, the outside air is supplied into the container main body W through the portion of the body cylinder 21 of the cylinder 11 located outside the storage space A, the vertical groove 22b and the outside air introduction hole 22a in the supply cylinder 22. be.

As described above, according to the discharger 1 of the present embodiment, the second valve seat surface 31a extends downward toward the supply hole 26, and the lower valve body 17 is positioned on the second valve seat surface 31a. Since the spherical body is separably seated upward, the solid matter can easily slide down from the second valve seat surface 31a to the supply hole 26, and the space between the lower valve body 17 and the second valve seat surface 31a can be easily removed. contact area can be suppressed, and the surface pressure between the lower valve element 17 and the second valve seat surface 31a can be increased.

As described above, even if solid matter tries to accumulate between the lower valve body 17 and the second valve seat surface 31a, the solid matter is pushed away by the outer peripheral surface of the lower valve body 17 when the pressure in the storage space A is positive. , the outer peripheral surface of the lower valve body 17 can be brought into contact with the second valve seat surface 31a over the entire circumference. Therefore, when the pressure in the storage space A is positive, it is possible to prevent the storage space A from communicating with the inside of the container body W through the supply hole 26 .

Since the lower valve body 17 is a spherical body that is seated on the second valve seat surface 31a so as to be able to move upward, the lower valve body 17 is moved to the second valve seat surface 31a when the pressure in the storage space A is negative. , and the contents in the container main body W can be stably supplied into the storage space A through the supply hole 26 .

Since the piston 15 is provided with the retaining projection 34a, the lower valve body 17 can be moved up and down only within the lower cylindrical portion 31. The distance from the second valve seat surface 31a is stabilized, and the amount of contents in the container body W supplied into the storage space A through the supply hole 26 can be stabilized.

Since the lower valve body 17 is made of a material having a higher specific gravity than the material forming the piston 15, it is possible to reliably increase the surface pressure between the lower valve body 17 and the second valve seat surface 31a. can.

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.

For example, the push-up portion 42 of the operating lever 18 may be an engaging projection provided not only on the lower surface of the stepped wall 15 a of the piston 15 but also on the outer peripheral surface of the piston 15 located below the sliding cylinder portion 27 . , may contact from below the engaging projection.

In addition, it is possible to appropriately replace the components in the above embodiments with known components without departing from the scope of the present invention, and the above embodiments and modifications may be combined as appropriate.

Reference Signs List 1 Discharger 11 Cylinder 14 Discharge Head 15 Piston 16 Biasing Member 17 Lower Valve Body 18 Operation Lever 25 Discharge Hole 26 Supply Hole 31 Lower Cylinder Part 31a Second Valve Seat Surface (Valve Seat Surface)
34a retaining projection A storage space W container body

Claims (3)

a cylinder having a storage space in which contents in the container body are stored and extending in the vertical direction;
an ejection head formed with an ejection hole for ejecting the content from the storage space;
a piston fitted in the cylinder so as to be vertically slidable, and formed with a supply hole that closes a lower end opening of the storage space and penetrates in the vertical direction and communicates with the container body;
a biasing member that supports the piston so that it can move upward in a downwardly biased state;
a lower valve body that closes the supply hole and opens the supply hole when the pressure in the storage space is negative;
an operating lever inserted into a portion of the cylinder located outside the storage space to push up the piston;
In the piston, a valve seat surface extending downward toward the supply hole is formed on the periphery of the opening of the supply hole in a portion defining the inner surface of the storage space,
The discharger, wherein the lower valve body is a spherical body seated on the valve seat face so as to be able to move upward. The piston includes a bottomed tubular lower tubular portion,
the supply hole and the valve seat surface are formed in the bottom wall of the lower tubular portion;
The piston is provided with a retainer protrusion that prevents the lower valve body from coming out of the lower cylindrical portion when the lower valve body that is separated upward from the valve seat surface collides with the lower valve body. 1. Dispenser according to claim 1. 3. The dispenser according to claim 1, wherein said lower valve body is made of a material having a higher specific gravity than the material forming said piston.

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