JP7433199B2 - Dispenser - Google Patents

Description

The present invention relates to a dispensing device.

Conventionally, as shown in Patent Document 1 below, for example, there has been a stem which is erected at the mouth of a container body so as to be movable downward in an upwardly biased state, and which is attached to the upper end of the stem and has a nozzle hole formed therein. a press-down head, a liquid cylinder in which a liquid piston that is connected to the vertical movement of the stem is housed so that it can slide up and down, and an air piston that is connected to the vertical movement of the stem that can be slid up and down. a contained pneumatic cylinder; when the push-down head and stem, together with the pneumatic piston and the pneumatic piston, are moved downwardly relative to the pneumatic cylinder and the pneumatic cylinder; A known configuration is known in which a liquid and air from within an air cylinder are mixed in a gas-liquid mixing chamber within a stem, and the resulting foam is discharged from a nozzle hole.

JP2009-208786A

However, in the conventional ejector, there is room for improvement in reducing the number of parts.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a dispensing device that can reduce the number of parts.

In order to solve the above-mentioned problems and achieve such objects, the discharger of the present invention includes a stem that is vertically movable downwardly in an upwardly biased state at the mouth of a container body containing liquid content. a press-down head that is attached to the upper end of the stem and has a nozzle hole formed therein; and a liquid cylinder in which a liquid piston that is linked to the vertical movement of the stem is housed in a vertically slidable manner; an air cylinder in which an air piston that is linked to the vertical movement of the stem is housed in a vertically slidable manner; A gas-liquid mixing chamber is provided in which the supplied liquid content is mixed with air supplied from within the air cylinder by downward movement of the air piston, and the stem is provided with A communication hole communicating with the gas-liquid mixing chamber is formed, and a lid tube that releasably closes the communication hole is fitted on the outside so as to be movable up and down, and the lid tube has an inner surface that abuts the outer peripheral surface of the stem. It includes a lid cylinder and an outer lid cylinder that surrounds the inner lid cylinder from the outside in the radial direction, and is formed integrally with the air piston, and the push-down head is formed on the lid cylinder or the air piston. The press-down cylinder is provided with a press-down part that is spaced upward from the pressed part, and the inside of the air cylinder and the outside of the discharge device are communicated through the inside of the press-down cylinder, so that when the press-down head is pressed, , the pressing head and the stem move downward relative to the air piston and the lid cylinder, and the pressing part contacts the pressed part to move the air piston downward, and the inner lid The cylinder has an upper seal portion that closely contacts a portion located above the communication hole on the outer peripheral surface of the stem, and a lower seal portion that tightly contacts a portion located below the communication hole. The seal between at least one of the upper seal portion and the lower seal portion and the outer circumferential surface of the stem is released when the push-down head is pressed down, and the communication hole communicates with the inside of the air cylinder. In addition, the outer lid cylinder closely contacts the inner circumferential surface of the push-down cylinder, and communication between the inside of the air cylinder through the inside of the push-down cylinder and the outside of the discharge device is cut off.

According to this invention, when the push-down head and the stem move downward relative to the air piston and the lid tube, the outer cover tube comes into close contact with the inner circumferential surface of the push-down tube, and the air passing through the inside of the push-down tube is brought into contact with the outer lid tube. The communication between the inside of the air cylinder and the outside of the discharge device is cut off, and the seal between at least one of the upper seal part and the lower seal part and the outer peripheral surface of the stem is released, and the communication hole and the inside of the air cylinder are cut off. communicate with. In this state, when the pressing part contacts the pressed part and moves the air piston downward, the inside of the air cylinder is pressurized and the air in the air cylinder is supplied to the gas-liquid mixing chamber through the communication hole. Ru. At this time, the liquid piston also moves downward, and the liquid content is supplied from inside the liquid cylinder to the gas-liquid mixing chamber. As a result, the content liquid and air are mixed to form bubbles and are discharged from the nozzle hole.
After that, when the push-down head is released, the push-down head and stem rise relative to the air piston and the lid cylinder due to the upward biasing force applied to the stem, and the push-down part is separated upward from the pressed part. , the seal between the outer lid cylinder and the inner peripheral surface of the push-down cylinder is released, and the inside of the air cylinder and the outside of the discharge device communicate through the inside of the push-down cylinder, and the upper seal part and the lower seal part are connected to the stem. It comes into close contact with the outer circumferential surface, and communication between the communication hole and the inside of the air cylinder is cut off. Therefore, when the inside of the air cylinder becomes negative pressure due to the upward restoring movement of the push-down head, stem, air piston, and lid cylinder, outside air is supplied into the air cylinder through the inside of the push-down cylinder. At this time, the liquid piston also moves upward within the liquid cylinder, and the liquid contained in the container body is supplied into the liquid cylinder.
Since the lid cylinder having the inner lid cylinder and the outer lid cylinder is formed integrally with the air piston, it can be used in addition to the air piston, for example, when pressurizing the air cylinder or during the above-mentioned standby. In this case, the above-mentioned effect can be achieved without providing a separate valve element that makes it difficult for the air in the air cylinder to flow out, and the number of parts can be reduced.
The inner lid cylinder has an upper seal part and a lower seal part, and the communication hole is sealed from both sides in the vertical direction, so when the air piston returns upward, the negative pressure generated inside the air cylinder , it is possible to reliably prevent the content liquid remaining in the gas-liquid mixing chamber from being sucked into the communication hole.

When the push-down head is pressed down, a seal between both the upper seal portion and the lower seal portion and the outer circumferential surface of the stem may be released.

In this case, when the push-down head is pressed down, the seal between both the upper seal part and the lower seal part and the outer peripheral surface of the stem is released, so when the air piston is moved downward, the air inside the air cylinder is Air can be smoothly introduced into the communication hole.

The air piston includes an annular main plate portion with front and back surfaces facing in the vertical direction, the stem is inserted inside the main plate portion, and the outer lid cylinder is formed at an inner peripheral edge of the main plate portion, The pressing portion may be a lower opening edge of the pressing cylinder, and the pressed portion may be an upper surface of the main plate portion.

In this case, the pressing part is the lower end opening edge of the pressing cylinder, and the pressed part is the upper surface of the main plate, so that when the pressing head is pressed down, the pneumatic piston can be stably moved downward.

The outer lid cylinder is inserted into the push-down cylinder with a gap provided between it and the inner peripheral surface of the push-down cylinder, and the inside of the air cylinder and the outside of the discharge device are connected through the gap. It may be communicated.

In this case, since the outer lid cylinder is inserted into the push-down cylinder, when the push-down head is pressed down, the outer lid cylinder can be smoothly and closely brought into contact with the inner circumferential surface of the push-down cylinder.

According to the present invention, the number of parts can be reduced.

FIG. 2 is a longitudinal cross-sectional view of the ejector of the first embodiment. FIG. 2 is a partially enlarged view of the ejector of FIG. 1; FIG. 2 is a diagram showing the ejector of FIG. 1 in a state in which the push-down head is located at a lower end position. 4 is a partially enlarged view of the ejector of FIG. 3. FIG. It is a longitudinal cross-sectional view of the ejector of 2nd Embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, 1st Embodiment of the discharge device based on this invention is described with reference to drawings.
As shown in FIG. 1, the discharge device 1 includes a stem 10, a push-down head 11, an air piston 13, an air cylinder 14, a liquid piston 15, and a liquid cylinder 16. Each component of the ejector 1 is a molded product made of synthetic resin unless otherwise specified.

The stem 10, the air piston 13, the air cylinder 14, the liquid piston 15, and the liquid cylinder 16 are arranged coaxially with a common axis. Hereinafter, this common axis will be referred to as the central axis O, the direction along the central axis O will be referred to as the vertical direction, the direction that intersects the central axis O as viewed from the vertical direction will be referred to as the radial direction, and the central axis O as viewed from the vertical direction will be referred to as the radial direction. It is called the direction in which it goes around and the circumferential direction.

The ejector 1 is attached via an attachment cap 12 to the opening A1 of the container body A containing the liquid content.
The mounting cap 12 is formed in the shape of a capped cylinder having a top wall portion 20 and a mounting peripheral wall portion 21, and is disposed coaxially with the central axis O.

The top wall portion 20 is formed in an annular shape, and the stem 10 is inserted inside the top wall portion 20 so as to be movable up and down. A guide tube portion 22 is formed on the upper surface of the ceiling wall portion 20 and projects upward. The guide cylinder portion 22 is arranged coaxially with the central axis O. The guide cylinder portion 22 is provided at the inner peripheral edge of the top wall portion 20. The guide tube portion 22 is provided with a first protrusion 22a that protrudes outward in the radial direction and extends continuously over the entire length in the circumferential direction. The first protruding portion 22a is provided at the upper end portion of the guide cylinder portion 22. The first protruding portion 22a is formed integrally with the guide cylinder portion 22. Note that the first protruding portion 22a may be separate from the guide cylinder portion 22.
A female threaded portion is formed on the inner circumferential surface of the mounting peripheral wall portion 21 and is screwed into a male threaded portion of the mouth portion A1 of the container body A. Note that the mounting peripheral wall portion 21 may be fitted into the mouth portion A1 by, for example, undercut fitting.

The air cylinder 14 is formed into a cylindrical shape with a bottom, and the bottom wall thereof is formed into an annular shape. A vertically intermediate portion of a cylindrical liquid cylinder 16 is connected to the opening peripheral portion of the bottom wall of the air cylinder 14 . The air cylinder 14 and the liquid cylinder 16 are integrally formed. The air cylinder 14 and the liquid cylinder 16 may be constructed separately and then connected by, for example, locking them together.

The upper end of the air cylinder 14 is in close contact with the inner surfaces of the mounting peripheral wall 21 and the top wall 20. The air cylinder 14 and the liquid cylinder 16 are housed inside the container body A while protruding downward from the mounting cap 12.
An air piston 13 that is connected to the vertical movement of the stem 10 is housed inside the air cylinder 14 so as to be slidable up and down, and a liquid piston 15 that is connected to the vertical movement of the stem 10 is housed inside the liquid cylinder 16. It is housed so that it can be slid up and down.

The push-down head 11 is formed into a cylindrical shape having a top wall portion 33 and an outer cylinder portion 31 . The push-down head 11 is arranged coaxially with the central axis O.

The inner diameter of the outer cylinder part 31 is larger than the outer diameter of the guide cylinder part 22, so that when the push-down head 11 is pushed down, the inner peripheral surface of the outer cylinder part 31 and the outer peripheral surface of the guide cylinder part 22 face each other in the radial direction. do. The outer cylinder portion 31 is provided with a second protrusion 31a that protrudes radially inward and extends continuously over the entire length in the circumferential direction. The second protruding portion 31a is provided at the lower end of the outer cylinder portion 31. The second protruding portion 31a is formed on the inner circumferential surface of the ring body 34 fitted within the outer cylinder portion 31. The ring body 34 is fitted within the lower end portion of the outer cylinder portion 31. In addition, the 2nd protrusion part 31a may be formed integrally with the outer cylinder part 31. The second protrusion 31a is in contact with or is close to the first protrusion 22a provided on the guide cylinder part 22. Thereby, water and the like are prevented from passing between the inner circumferential surface of the outer cylinder part 31 and the outer circumferential surface of the guide cylinder part 22 from the outside of the discharge device 1 .
A mounting cylinder part 30 is formed on the top wall part 33 and projects downward, into which the upper end of the stem 10 is fitted.

The push-down head 11 includes a push-down tube 35 that surrounds the mounting tube section 30 from the outside in the radial direction. The push-down cylinder 35 and the mounting cylinder part 30 are arranged coaxially with the central axis O. The lower end of the push-down cylinder 35 is located below the lower ends of the mounting cylinder 30 and the outer cylinder 31. The push-down cylinder 35 is inserted inside the guide cylinder part 22 so as to be movable up and down. A radial gap is provided between the outer circumferential surface of the push-down tube 35 and the inner circumferential surface of the guide tube portion 22. The inside of the air cylinder 14 and the outside of the discharge device 1 communicate through this gap and the inside of the push-down cylinder 35. The lower end portion of the push-down tube 35 is inserted into the inside of the top wall portion 20 of the mounting cap 12 so as to be movable up and down.

The press-down head 11 includes a nozzle cylinder part 32 that extends radially outward from the mounting cylinder part 30 and radially penetrates the press-down cylinder 35 and the outer cylinder part 31 . A nozzle hole 32 a that opens in the radial direction is formed at the tip of the nozzle cylinder portion 32 . The inside of the nozzle cylinder part 32 communicates with the inside of the mounting cylinder part 30.

The air piston 13 is formed into a capped cylinder shape having an annular main plate part 53 whose front and back surfaces face in the vertical direction, and an outer cylinder 50 extending downward from the outer peripheral edge of the main plate part 53.

A cylindrical sliding contact portion 50a is formed at the lower end of the outer cylinder 50 and is fitted inside the air cylinder 14 in an airtight manner so as to be slidable up and down.
The stem 10 is inserted inside the main plate portion 53. The upper surface of the main plate section 53 is in contact with or close to the lower surface of the top wall section 20 of the mounting cap 12 . The inner circumferential edge of the upper surface of the main plate part 53 faces the lower opening edge of the push-down tube 35 in the vertical direction while being spaced downward from it. As a result, when the push-down head 11 is pressed down, the push-down head 11 and the stem 10 move downward with respect to the air piston 13, and the lower end opening edge of the push-down cylinder 35 hits the inner peripheral edge on the upper surface of the main plate part 53. Later, the lower end opening edge of the push-down cylinder 35 pushes down the upper surface of the main plate part 53, and the air piston 13 moves downward.
Hereinafter, the lower end opening edge of the push-down cylinder 35 will be referred to as a push-down part 35a, and the inner peripheral edge on the upper surface of the main plate part 53 will be called a pushed-down part 53a (see FIG. 2).

The stem 10 is erected at the mouth A1 so as to be movable downward while being biased upward. The upper end portion of the stem 10 is fitted inside the mounting cylinder portion 30. The lower end of the stem 10 is inserted into the upper end of the liquid cylinder 16. A foamed member 17, which will be described later, is fitted into the upper end of the stem 10.
In the stem 10, there is a gas which mixes the content liquid supplied from inside the liquid cylinder 16 by the downward movement of the liquid piston 15 and the air supplied from the inside of the air cylinder 14 by the downward movement of the air piston 13. A liquid mixing chamber R is provided. The gas-liquid mixing chamber R is provided within the stem 10 at a portion continuous to the foam member 17 from below the foam member 17 .

The foaming member 17 foams the gas-liquid mixture mixed in the gas-liquid mixing chamber R into a predetermined foam shape. The foam member 17 is provided between the gas-liquid mixing chamber R and the nozzle hole 32a. The foam member 17 is provided inside the mounting cylinder portion 30 of the push-down head 11 .
The foam member 17 includes two foam elements 41. The two foam elements 41 are arranged in series in the vertical direction.
The foaming element 41 includes a cylindrical body extending in the vertical direction and a mesh member provided at the end of the cylindrical body in the vertical direction. Of the two foam elements 41, the foam element 41 located on the upper side is provided with the mesh member located at the upper end, and the foam element 41 located on the lower side is provided with the mesh member located on the lower end. ing.

The stem 10 is formed with a communication hole 10a that communicates the inside of the air cylinder 14 with the gas-liquid mixing chamber R. The communication hole 10a opens in the lower end of the gas-liquid mixing chamber R in the radial direction. The flow passage cross-sectional area at the radially inner end of the communicating hole 10a is smaller than the flow passage cross-sectional area at the radial outer end of the communicating hole 10a.
A rectifying portion 10b is provided within the stem 10 and radially opposed to the communication hole 10a. The rectifier 10b is formed into a rod shape extending in the vertical direction. The rectifier 10b is arranged coaxially with the central axis O.
On the outer circumferential surface of the stem 10, an upper step surface 10c facing upward is formed in a portion adjacent to the upper side with respect to the communication hole 10a, and a lower step surface facing upward is formed in a portion adjacent to the lower side with respect to the communication hole 10a. A stepped surface 10d is formed (see FIG. 2).

A rod-shaped valve member 37 extending in the vertical direction is provided within the liquid cylinder 16 . The valve member 37 is arranged coaxially with the central axis O.
The lower end of the valve member 37 becomes a lower valve body 37a that comes into contact with the inner surface of the lower end of the liquid cylinder 16 when the push-down head 11 is pressed down, and blocks communication between the inside of the container body A and the inside of the liquid cylinder 16. ing. The lower valve body 37a is upwardly separated from the inner surface of the lower end portion of the liquid cylinder 16 during standby when the push-down head 11 is located at the ascending end position as shown in FIG.
A portion of the liquid piston 15 that faces the lower opening edge of the stem 10 in the vertical direction is located below the lower opening edge of the stem 10 .

A cylindrical piston guide 18 is fitted into the stem 10. The upper part of the piston guide 18 is fitted into a portion of the stem 10 located below the gas-liquid mixing chamber R. A lower portion of the piston guide 18 projects downward from the stem 10 and is inserted into the liquid piston 15 so as to be movable up and down. A lateral hole 18a is formed in the lower part of the piston guide 18 and penetrates in the radial direction. The horizontal hole 18a is covered by the liquid piston 15 from the outside in the radial direction.

The piston guide 18 is formed with a pedestal portion 18b that projects outward in the radial direction. The pedestal portion 18b is formed in a portion of the piston guide 18 located below the horizontal hole 18a. The pedestal portion 18b supports the liquid piston 15 from below.
A sliding protrusion 18c is formed on the piston guide 18 and tightly fitted onto the valve member 37 so as to be vertically slidable. The sliding protrusion 18c protrudes radially inward from a portion of the piston guide 18 located below the horizontal hole 18a, and extends continuously over the entire length in the circumferential direction.
The pedestal portion 18b and the sliding protrusion 18c block communication between a portion of the liquid cylinder 16 located below the liquid piston 15 and the horizontal hole 18a. When the piston guide 18 moves downward relative to the liquid piston 15 and the pedestal portion 18b is spaced downward from the liquid piston 15, a portion located below the liquid piston 15 in the liquid cylinder 16 and , and the horizontal hole 18a communicate with each other.

An upper end portion of the biasing member 66 is supported on the lower surface of the pedestal portion 18b. The biasing member 66 is, for example, a coil spring or a resin spring. A lower end portion of the biasing member 66 is supported by the inner surface of the liquid cylinder 16.

In this embodiment, a lid cylinder 24 that releasably closes the communication hole 10a is fitted onto the stem 10 so as to be movable up and down. The lid cylinder 24 is formed integrally with the air piston 13. As shown in FIG. 2, the lid tube 24 includes an inner lid tube 25 that contacts the outer peripheral surface of the stem 10, and an outer lid tube 26 that surrounds the inner lid tube 25 from the outside in the radial direction. An air hole 52 is formed in the lid cylinder 24 and penetrates in the vertical direction. The air hole 52 is provided between the inner lid cylinder 25 and the outer lid cylinder 26.

A portion of the stem 10 that extends from below to the upper end portion fitted inside the mounting tube portion 30 is inserted into the inner side of the inner lid tube 25 so as to be vertically slidable. The inner lid cylinder 25 includes an upper seal portion 25a that closely contacts a portion of the outer peripheral surface of the stem 10 located above the communication hole 10a, and a lower seal portion that closely contacts a portion of the stem 10 that is located below the communication hole 10a. A portion 25b is provided. The upper seal portion 25a is in contact with the upper stepped surface 10c of the stem 10 in the vertical direction. The lower seal portion 25b is in contact with the lower step surface 10d of the stem 10 in the vertical direction. On the inner peripheral surface of the inner lid cylinder 25, a portion located between the upper seal part 25a and the lower seal part 25b is separated from the outer peripheral surface of the stem 10 radially outward. The upper end portion of the inner lid cylinder 25 is located above the main plate portion 53 of the air piston 13, and the lower end portion of the inner lid cylinder 25 is located below the main plate portion 53.

When the push-down head 11 is pressed down, the stem 10 moves downward with respect to the lid cylinder 24 and the air piston 13, so that the upper seal part 25a and the lower seal part 25b are closed, as shown in FIGS. 3 and 4, for example. The seal between at least one of them and the outer peripheral surface of the stem 10 is released, and the communication hole 10a and the inside of the air cylinder 14 communicate with each other. In the illustrated example, when the push-down head 11 is pressed down, the seal between both the upper seal portion 25a and the lower seal portion 25b and the outer peripheral surface of the stem 10 is released.

The outer lid cylinder 26 is formed on the inner peripheral edge of the main plate portion 53. The outer lid cylinder 26 projects upward from the main plate portion 53. The upper end of the outer lid cylinder 26 is located above the upper end of the inner lid cylinder 25. The upper end of the outer lid cylinder 26 extends radially outward as it goes upward, and the portion that connects to the upper end from below extends substantially straight in the vertical direction. The outer lid cylinder 26 is inserted into the push-down cylinder 35 during standby when the push-down head 11 is located at the raised end position as shown in FIGS. 1 and 2. A radial gap X is provided between the outer lid cylinder 26 and the inner peripheral surface of the push-down cylinder 35.
This gap It communicates with the outside of the ejector 1 through the inner circumferential surface of the ejector 1.
When the push-down head 11 is pressed down, the push-down head 11 moves downward relative to the lid cylinder 24 and the air piston 13, so that the upper end of the outer lid cylinder 26, for example, as shown in FIGS. 3 and 4, It comes into close contact with the inner circumferential surface of the push-down cylinder 35, and communication between the inside of the air cylinder 14 passing through the inside of the push-down cylinder 35 and the outside of the discharge device 1 is cut off.

Next, a method of using the ejector 1 configured as described above will be described.

When the push-down head 11 is pushed down, the stem 10 and the piston guide 18 move downward following the push-down head 11.

At this time, the air piston 13 does not move downward due to the frictional force between it and the inner peripheral surface of the air cylinder 14. Therefore, as shown in FIGS. 3 and 4, for example, the pressing part 35a of the pressing head 11 abuts against the pressed part 53a of the air piston 13, and both the upper seal part 25a and the lower seal part 25b and the stem 10 The seal with the outer peripheral surface is released, and the communication hole 10a communicates with the portion of the air cylinder 14 located below the air piston 13, and the upper end of the outer lid cylinder 26 It closely contacts the inner circumferential surface of the push-down tube 35 and blocks communication between the inside of the air cylinder 14 passing through the inside of the push-down tube 35 and the outside of the discharge device 1.
Furthermore, since the liquid piston 15 also does not move downward due to the frictional force between it and the inner peripheral surface of the liquid cylinder 16, the pedestal portion 18b is spaced downward from the liquid piston 15, and the liquid A portion located below the piston 15 and the horizontal hole 18a communicate with each other, and the lower opening edge of the stem 10 abuts against the liquid piston 15.
Furthermore, the sliding protrusion 18c of the piston guide 18 slides the outer circumferential surface of the valve member 37 downward, so that the valve member 37 moves downward, and the lower valve body 37a moves toward the lower end of the liquid cylinder 16. The liquid cylinder 16 comes into contact with the inner surface of the liquid cylinder 16, thereby blocking communication between the inside of the container body A and the inside of the liquid cylinder 16.

Thereafter, when the push-down head 11 is further pushed down against the upward biasing force of the biasing member 66, the outer lid cylinder 26 cuts off the communication between the outside of the discharge device 1 and the inside of the air cylinder 14, and releases the air. Since the air piston 13 moves downward within the air cylinder 14, the air in the portion located below the air piston 13 within the air cylinder 14 is compressed. Thereby, the air in the air cylinder 14 is supplied from the outside in the radial direction into the gas-liquid mixing chamber R through the communication hole 10a.
Furthermore, at this time, the liquid piston 15 moves downward within the liquid cylinder 16 with the lower valve body 37a blocking communication between the inside of the container body A and the inside of the liquid cylinder 16. Inside, the liquid in the portion located below the liquid piston 15 is compressed. Thereby, the liquid inside the liquid cylinder 16 is supplied from below to the gas-liquid mixing chamber R through the outer peripheral surface side of the pedestal portion 18b and the horizontal hole 18a.

From the above, the liquid content and air can be combined in the gas-liquid mixing chamber R to form a gas-liquid mixture. Then, the gas-liquid mixture passes through the mesh members of the two foaming elements 41 and becomes a predetermined fine-grained foam. Then, this foamy content liquid is discharged to the outside through the nozzle hole 32a of the push-down head 11.

After discharging, when the push-down of the push-down head 11 is released, the push-down head 11, stem 10, and piston guide 18 move upward due to the elastic restoring force of the biasing member 66, while the air piston 13 and the liquid piston 15 move upward. , does not move upward due to the aforementioned frictional force.
As a result, the pedestal portion 18b of the piston guide 18 butts against the liquid piston 15, and communication between the portion of the liquid cylinder 16 located below the liquid piston 15 and the horizontal hole 18a is cut off.
Further, the upper step surface 10c of the stem 10 abuts against the upper seal portion 25a, and the lower step surface 10d of the stem 10 abuts against the lower seal portion 25b, so that the air Communication with a portion located below the piston 13 is cut off.
Furthermore, the pressing part 35a of the pressing head 11 is separated upward from the pressed part 53a of the air piston 13, the seal between the outer lid cylinder 26 and the inner peripheral surface of the pressing cylinder 35 is released, and the outer lid cylinder 26 and the inner circumferential surface of the push-down tube 35 communicates between the outer circumference of the push-down tube 35 and the inner circumference of the guide tube portion 22, as well as the air hole 52, and communicates with the outside of the discharge device 1. It communicates with the inside of the air cylinder 14.
Further, the sliding protrusion 18c of the piston guide 18 slides upward on the outer peripheral surface of the valve member 37, so that the valve member 37 moves upward, and the lower valve body 37a moves toward the lower end of the liquid cylinder 16. The inside of the container body A and the inside of the liquid cylinder 16 communicate with each other.

After that, when the push-down head 11, stem 10, and piston guide 18 move further upward, the communication between the communication hole 10a and the inside of the air cylinder 14 is cut off, and the outside of the discharge device 1 and the inside of the air cylinder 14 are communicated with each other. In this state, the air piston 13 moves upward inside the air cylinder 14, so that the inside of the air cylinder 14 becomes negative pressure, and the outside air flows between the outer peripheral surface of the push-down cylinder 35 and the inner peripheral surface of the guide cylinder part 22. During this period, air is supplied into the air cylinder 14 through the gap X and the air hole 52.
Further, at this time, the liquid piston 15 moves upward within the liquid cylinder 16 with the inside of the container body A and the inside of the liquid cylinder 16 communicating with each other, so that the liquid content in the container body A is transferred to the liquid cylinder 16. 16.

As explained above, according to the discharge device 1 of the present embodiment, the lid cylinder 24 having the inner lid cylinder 25 and the outer lid cylinder 26 is formed integrally with the air piston 13. In addition, the above-mentioned effect can be achieved without providing a separate valve element that makes it difficult for the air inside the air cylinder 14 to flow out, for example, when pressurizing the air cylinder 14 or during the above-mentioned standby time. Therefore, the number of parts can be reduced.

Since the inner lid cylinder 25 includes an upper seal part 25a and a lower seal part 25b, and the communication hole 10a is sealed from both sides in the vertical direction, when the air piston 13 returns upward, the air cylinder 14 The negative pressure generated inside can reliably prevent the content liquid remaining in the gas-liquid mixing chamber R from being sucked into the communication hole 10a.

When the push-down head 11 is pressed down, the seal between both the upper seal part 25a and the lower seal part 25b and the outer peripheral surface of the stem 10 is released, so when the air piston 13 is moved downward, the air cylinder The air in the air can be smoothly introduced into the communication hole 10a.

The pressing part 35a is the lower opening edge of the pressing cylinder 35, and the pressed part 53a is the upper surface of the main plate part 53, so that while suppressing the complexity of the structure, when the pressing head 11 is pressed, air is removed. The piston 13 can be stably moved downward.

Since the outer lid cylinder 26 is inserted into the push-down cylinder 35, when the push-down head 11 is pressed down, the outer lid cylinder 26 can be smoothly brought into close contact with the inner peripheral surface of the push-down cylinder 35.

Next, a discharge device 2 according to a second embodiment of the present invention will be described with reference to FIG. 5.
In addition, in this 2nd embodiment, the same code|symbol is attached|subjected to the same component as the component in 1st Embodiment, the description is abbreviate|omitted, and only a different point will be described.

In this embodiment, the air cylinder 14 is provided outside the container body A.
In the illustrated example, the air cylinder 14 is separate from the liquid cylinder 16. The air cylinder 14 surrounds the mounting cap 12 from the outside in the radial direction. The air cylinder 14 is formed into a cylindrical shape with a bottom, and the bottom wall thereof is formed into an annular shape. The outer peripheral surface of the mounting peripheral wall portion 21 of the mounting cap 12 is connected to the opening peripheral portion of the bottom wall of the air cylinder 14 . The air cylinder 14 is integrally formed with the mounting cap 12.

A capped cylindrical lid member 61 is attached to the upper end of the air cylinder 14 . The lid member 61 is disposed coaxially with the central axis O. The top wall of the lid member 61 is formed into an annular shape, and the stem 10 and the lower end of the push-down tube 35 are inserted into the top wall so as to be movable up and down.
Here, the mounting cap 12 is not provided with the guide cylinder part 22, and the guide cylinder part 22 extends upward from the opening periphery of the top wall of the lid member 61. The guide cylinder portion 22 is formed integrally with the lid member 61.

A mounting flange portion 16a is formed at the upper end of the liquid cylinder 16, protruding outward in the radial direction and extending continuously over the entire length in the circumferential direction. The mounting flange portion 16a is tightly sandwiched and fixed in the vertical direction between the upper opening edge of the mouth portion A1 and the lower surface of the top wall portion 20 of the mounting cap 12.

As explained above, according to the discharge device 2 of this embodiment, the air cylinder 14 is provided outside the container body A, so it is possible to keep the inner diameter of the opening A1 small, and the opening The sealing of the upper end opening of the portion A1 can be easily ensured, and the outer diameter of the container body A can be kept small.

Note that the technical scope of the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention.

For example, in the embodiment described above, when the push-down head 11 is on standby at the ascending end position, the outer lid cylinder 26 is inserted into the push-down cylinder 35 with a gap X provided between it and the inner peripheral surface of the push-down cylinder 35. Although the inserted configuration is shown, the outer lid tube 26 may be located below the push-down tube 35 during the standby period.
In the embodiment described above, the push-down tube 35 surrounds the mounting tube section 30 from the outside in the radial direction, but for example, the push-down tube 35 extends downward from the lower opening edge of the attachment tube section 30, and A configuration in which the inner circumferential surface of the push-down tube 35 is located radially outside the inner circumferential surface of the mounting tube portion 30 may be adopted.
The pressing part 35a is formed on the inner peripheral surface of the pressing cylinder 35, the pressed part 53a is formed at the upper opening edge of the outer lid cylinder 26 of the lid cylinder 24, and the pressing part 35a is formed on the upper opening edge of the outer lid cylinder 26 and the pressing cylinder A vertical gap may be provided between the inner circumferential surface of 35 and the inner circumferential surface of 35.

In the embodiment described above, the foaming element 41 includes a mesh member, and the gas-liquid mixture is made into a foam by passing through the mesh member. However, the foaming element 41 is not limited to the mesh member. You can also make it foamy.
As the discharger 1, a configuration may be adopted in which the foaming member 17 is not provided and the content liquid foamed in the gas-liquid mixing chamber R is discharged from the nozzle hole 32a.

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

1, 2 Discharge device 11 Press-down head 10 Stem 10a Communication hole 12 Mounting cap 13 Air piston 14 Air cylinder 15 Liquid piston 16 Liquid cylinder 24 Lid cylinder 25 Inner lid cylinder 25a Upper seal part 25b Lower seal part 26 Outer lid Cylinder 30 Mounting cylinder part 32a Nozzle hole 35 Pressing cylinder 35a Pressing part 53 Main plate part 53a Pressed part 66 Biasing member A Container body A1 Mouth part R Gas-liquid mixing chamber X Gap

Claims (4)

a stem that is movable downwardly in an upwardly biased state at the mouth of the container housing the liquid content;
a push-down head attached to the upper end of the stem and having a nozzle hole formed therein;
a liquid cylinder in which a liquid piston that is linked to the vertical movement of the stem is housed in a vertically slidable manner;
an air cylinder in which an air piston that is linked to the vertical movement of the stem is housed in a vertically slidable manner;
In the stem, the content liquid supplied from within the liquid cylinder by the downward movement of the liquid piston and the air supplied from the air cylinder by the downward movement of the air piston are mixed. A gas-liquid mixing chamber is provided,
A communication hole communicating between the inside of the air cylinder and the gas-liquid mixing chamber is formed in the stem, and a lid tube that releasably closes the communication hole is fitted onto the stem so as to be movable up and down,
The lid cylinder includes an inner lid cylinder that comes into contact with the outer peripheral surface of the stem, and an outer lid cylinder that surrounds the inner lid cylinder from the outside in the radial direction, and is formed integrally with the air piston,
The push-down head includes a push-down cylinder in which a push-down part is formed that is spaced upward from a pressed part formed on the lid cylinder or the air piston, and the push-down head passes through the inside of the push-down cylinder to the inside of the air cylinder. This discharger communicates with the outside,
When the push-down head is pressed down, the push-down head and the stem move downward relative to the air piston and the lid cylinder, and the push-down part comes into contact with the pressed part to push the air piston downward. move it,
The inner lid cylinder has an upper seal portion that closely contacts a portion located above the communication hole on the outer peripheral surface of the stem, and a lower seal portion that tightly contacts a portion located below the communication hole. and,
When the push-down head is pressed down, the seal between at least one of the upper seal part and the lower seal part and the outer peripheral surface of the stem is released, and the communication hole and the inside of the air cylinder are communicated with each other, and the discharge device, wherein the outer lid cylinder closely contacts the inner peripheral surface of the push-down cylinder, and communication between the inside of the air cylinder through the inside of the push-down cylinder and the outside of the discharge device is cut off. The ejector according to claim 1, wherein when the push-down head is pressed down, seals between both the upper seal part and the lower seal part and the outer peripheral surface of the stem are released. The air piston includes an annular main plate portion with front and back surfaces facing in the vertical direction, and the stem is inserted inside the main plate portion,
The outer lid cylinder is formed on the inner peripheral edge of the main plate part,
The ejector according to claim 1 or 2, wherein the pressing portion is a lower opening edge of the pressing cylinder, and the pressed portion is an upper surface of the main plate portion. The outer lid cylinder is inserted into the push-down cylinder with a gap provided between it and the inner peripheral surface of the push-down cylinder, and the inside of the air cylinder and the outside of the discharge device are connected through the gap. The ejector according to any one of claims 1 to 3, which communicates with each other.

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