JP3285187B2 - Container with foam ejection pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container with a foam ejection pump.

[0002]

2. Description of the Related Art As a container equipped with a foam ejection pump, for example, one disclosed in International Publication No. WO92 / 08657 is known.

In this container with a foam ejection pump, the liquid and air are pumped up by depressing the pump head, and foam is generated by passing them through a net (foaming member). It gushes out.

[0004]

In a conventional container equipped with a foam ejection pump, since the mesh, which is a foam member, is exposed to the outside air when not in use, the foam attached to the mesh is dried and solidified. Some or all of the meshes could be blocked. This clogging of the net resulted in insufficient or unstable foam formation during subsequent pump operation.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has a bubble jet which can form bubbles reliably and stably by sealing the inside of a pump when not in use. It is an object to provide a container with a pump.

[0006]

The present invention has the following features to attain the object mentioned above. The first invention of the present application is
A foam ejection pump is attached to the mouth and neck of the container body. The foam ejection pump includes a liquid cylinder in which a first piston slides inside, and an air cylinder in which a second piston slides inside.
A pump head provided with an ejection port and connected to the first piston and the second piston to drive both pistons; and a gas-liquid mixing chamber in which the liquid sent from the liquid cylinder and the air sent from the air cylinder merge. And a foaming member installed between the jet port and the gas-liquid mixing chamber, and the liquid in the container and the outside air are merged in the gas-liquid mixing chamber by pressing down the pump head, and foaming is performed through the foaming member. The pump head has a double-tube structure including an inner cylinder member and an outer cylinder member rotatably fitted to each other, and the inner cylinder member Comprises a foam flow portion located downstream of the foam member, the foam flow portion is provided with a jet hole, and the outer tubular member is provided with the jet port,
A closing member is provided for opening and closing the ejection hole by sliding the bubble flowing portion in a liquid-tight manner, and the closing member opens and closes the ejection hole by rotating the outer cylindrical member with respect to the inner cylindrical member. In the open state, while the ejection port is located in front of the ejection port, a vertical rib is formed on the central cylinder portion of the mounting cylinder screwed to the mouth and neck of the container body, and an engagement projection is formed on the inner cylinder member, A container with a foam ejection pump (corresponding to claim 1), wherein the engagement projection is inserted between the vertical ribs to serve as a guide.

According to the second aspect of the present invention, in the first aspect, the vertical ribs and the engaging projections may be configured to have tapered surfaces for guiding each other (corresponding to claim 2). ).

[0008] The foamed member can be constituted by a net having a predetermined mesh size. The foamed member can be housed in the inner cylinder member of the pump head, but may be mounted on another member arranged on the upstream side of the inner cylinder member.

[0009]

FIG. 1 is a block diagram showing an embodiment of the present invention.
19 will be described with reference to FIG.

[First Embodiment] First, a container with a foam ejection pump according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 8.

FIGS. 1 and 2 are longitudinal sectional views of a container with a foam ejection pump according to the first embodiment, and FIGS.
Is an enlarged view of a main part.

<Structure> First, the structure of a container with a foam ejection pump will be described. The container with a foam ejection pump is configured by attaching a foam ejection pump 10 to the mouth and neck 2 of the container body 1. The container body 1 contains a foaming liquid such as a face wash.

The foam ejection pump 10 includes a cylinder member 20.
, Liquid suction valve 30, stem 40, first piston 50
, A second piston 60, a liquid discharge valve 70, a first air suction valve 80, a second air suction valve 90, and a pump head 10.
0, a foaming unit 130, and a mounting cylinder 150.

The cylinder member 20 has an annular flange portion 21 at the upper end, and a cylindrical large-diameter cylinder portion (air cylinder) 22 having an interior as an air chamber extends downward from the flange portion 21 and defines an interior as a liquid chamber. A cylindrical small-diameter cylinder portion (liquid cylinder) 24 extends concentrically downward from the bottom plate portion 23 of the large-diameter cylinder portion 22, and a connecting cylinder 25 extends downward from the lower end of the small-diameter cylinder portion 24. I have.

The cylinder member 20 has a large-diameter cylinder portion 22, a small-diameter cylinder portion 24, and a connection cylinder 25 inserted into the container body 1 from the mouth and neck portion 2, and a flange is mounted on a packing 200 disposed on the upper surface of the mouth and neck portion 2. The portion 21 is placed and fixed to the container body 1 by a mounting tube 150 screwed to the mouth and neck portion 2. The flange portion 21 is provided with a plurality of air holes 27 at a portion located inside the mouth and neck portion 2.

A suction pipe 201 is connected to the connection cylinder 25 of the cylinder member 20, and the lower end of the suction pipe 201 extends to the bottom of the container 1.

A center tube 151 is provided at the center of the mounting tube 150, and the pump head 100 protrudes vertically from the center tube 151. Pump head 10
A foaming unit 130 is mounted inside the pump head 100, and a stem 40 that moves up and down in the cylinder member 20 is connected and fixed to a lower portion of the pump head 100. A liquid discharge valve 70 is provided inside the stem 40, and a second piston 60 that hermetically slides on the inner peripheral surface of the large-diameter cylinder 22 is attached to the outer peripheral portion of the stem 40. The second piston 60 is provided with a second air suction valve 90.
The lower part of the stem 40 is connected to a first piston 50 which slides on the inner peripheral surface of the small-diameter cylinder portion 24 in a liquid-tight manner.
On the lower side of the piston 50, a liquid suction valve 3 that operates in connection with the stem 40 and the first piston 50 to open and close the connection cylinder 25.
0 is arranged.

Each component will be described in detail below. The liquid suction valve 30, the coil spring 39, and the first piston 50 are housed in the small-diameter cylinder portion 24 of the cylinder member 20. The lower end of the liquid suction valve 30 is formed on a lower valve body 31 which can be seated on and separated from a valve seat 24 a having a tapered surface formed at the lower end of the small-diameter cylinder portion 24.
Open and close 5.

In the liquid suction valve 30, a plurality of engaging pins 32 projecting outward are provided above the lower valve body 31, and the engaging pins 32 are provided at the lower end of the small-diameter cylinder portion 24. It is vertically movably inserted between the plurality of vertical ribs 26.

The liquid suction valve 30 has a large diameter portion 33 above the engagement pin 32, and a small diameter portion 34 is connected to the upper portion of the large diameter portion 33. Vertical grooves 33 extending in the vertical direction are respectively formed on the outer peripheral surface of the large diameter portion 33 and the outer peripheral surface of the small diameter portion 34.
a, 34a are formed. The upper end of the liquid suction valve 30 connected to the small diameter portion 34 is a tapered cylindrical upper valve body 35 having a larger diameter as it goes upward.

The first piston 50 has a hollow cylindrical shape with an open top and bottom, and a lower portion thereof is a seal portion 51 which slides on the inner peripheral surface of the small-diameter cylinder portion 24 in a liquid-tight manner. The periphery of the upper opening forms a valve seat 52.

The upper valve body 35 of the liquid suction valve 30 projects upward from the upper opening of the first piston 50,
And can be separated from the valve seat 52, and opens and closes the upper opening of the first piston 50.

In the first piston 50, the small diameter portion 34 of the liquid suction valve 30 is usually provided with the first piston 50 as shown in FIG.
Is inserted with a sufficient gap between the inner peripheral surface of the
When the pump head 100 is pushed down to lower the stem 40 as shown in FIG.
3 can enter with a slight gap between it and the inner peripheral surface of the first piston 50, and in that case, the vertical groove 33a secures a liquid flow path.

The coil spring 39 is connected to the cylinder member 2.
The first piston 50 is provided between the upper end of the vertical rib 26 at 0 and the first piston 50 and urges the first piston 50 upward.
On the other hand, the engaging pin 32 of the liquid suction valve 30 can be hooked from below on the lower end of the coil spring 39, thereby restricting the upper limit of the upward movement of the liquid suction valve 30.

The stem 40 has a cylindrical shape with an open top and bottom, and is accommodated in the large-diameter cylinder portion 22 and the small-diameter cylinder portion 24 so as to be vertically movable. The first under the stem 40
The upper part of the piston 50 is inserted and fixed.
The seal part 51 is projected from the lower part of the.

An annular valve seat 41 is formed in the upper portion of the inside of the stem 40 and projects in a substantially L-shaped cross section. Stem 40
The upper part of the valve seat 41 is a gas-liquid mixing chamber 46, in which a spherical liquid discharge valve 70 that can be seated on and separated from the valve seat 41 is movably accommodated.

A plurality of vertical ribs 42 extending in the vertical direction are provided on the inner side of the stem 40 and extending from above the part where the first piston 30 is fixed to the lower part of the valve seat 41 in a circumferential direction. Have been. Inside the vertical rib 42,
When the stem 40 is lowered by pushing down the pump head 100 as shown in FIG.
5 and the small-diameter portion 34 can enter. At this time, the vertical groove 34a between the vertical ribs 42 and the small-diameter portion 34 of the liquid suction valve 30 becomes a liquid passage.

The pump head 100 connected to the upper part of the stem 40 has an outer tubular member 110 and an inner tubular member 120. The inner cylindrical member 120 has a hollow cylindrical shape with an open top and bottom, and has a small diameter portion (bubble flowing portion) 121 and a middle diameter portion 1 from above.
22, a large-diameter portion 123, and a skirt tube portion 124 having a larger diameter than the large-diameter portion 123 continues below the large-diameter portion 123. Further, a cylindrical valve body 125 is formed to protrude inside the skirt tube portion 124 and on a downward extension of the large diameter portion 123.

The small diameter portion 121 of the inner cylindrical member 120 has only one ejection hole 121b. Inner tubular member 120
The upper portion of the stem 40 is fitted and fixed inside the large-diameter portion 123. Further, a plurality of vertical grooves 123a extending in the vertical direction are provided on the inner peripheral surface of the large-diameter portion 123 so as to be dispersed in the circumferential direction. The upper end of the vertical groove 123a extends slightly above the upper end of the stem 40, and the vertical groove 123a functions as an air passage.

A foaming unit 130 is housed and fixed inside the middle diameter portion 122 of the inner cylindrical member 120. The foaming unit 130 includes a hollow cylindrical casing 131 having an open top and bottom, and two foaming elements 132 attached to the casing 131. Casing 13
Reference numeral 1 denotes a large-diameter portion 131a on the upper side and a small-diameter portion 131b on the lower side. The large-diameter portion 131a is inserted and fixed inside the middle-diameter portion 122 of the inner tubular member 120, and the small-diameter portion 131b is radially inserted into the stem 40. Is inserted with a gap. Also, gaps are provided between the bottom of the large diameter portion 131a and the upper end of the stem 40, and these gaps function as air passages.

The foaming element 132 is constituted by attaching a net (foaming member) 133 to one end opening of a cylindrical body which is opened up and down. Net 13 on side opening
3 is attached, and in the foaming element 132 arranged on the upper side in the casing 131, the cylindrical body 132a
A net 132b is attached to the upper opening of the web.

A plurality of vertical grooves extending upward from the lower end surface of the small diameter portion 131b of the casing 131 are formed in the lower inner peripheral surface thereof. The air flow path can be secured.

The outer tubular member 110 of the pump head 100 has a peripheral wall 111 having a cylindrical shape with a top, and a protrusion 112 protruding laterally is provided on one upper side of the peripheral wall 111. The inside of the peripheral wall portion 111 is a stepped hole having a large diameter on the lower side and a small diameter on the upper side. On the other hand, the protruding portion 112 has a cylindrical shape whose tip opens as a substantially rectangular ejection port 113,
13 is connected to the upper end of the stepped hole inside the outer cylindrical member 110. Note that the shape of the ejection port 113 is not limited to a rectangle, and may be a circle, an ellipse, or the like.

From the inner surface of the top plate portion 114 of the outer tubular member 110, a tubular portion (closing body) 115 extends downward.
15 has only one opening 115a. The outer cylindrical member 110 has a cylindrical portion 115 which is rotatably fitted in the small-diameter portion 121 of the inner cylindrical member 120 in a liquid-tight manner, and is fitted into the small-diameter portion of the stepped hole of the outer cylindrical member 110.
0, the medium diameter portion 122 is fitted in a liquid-tight manner so as to be rotatable, and the large diameter portion 123 of the inner cylindrical member 120 is inserted into the large diameter portion of the stepped hole with a gap. To be rotatably fitted.

FIG. 5 is a cross-sectional view of the tubular portion 115 of the outer tubular member 110 and the small diameter portion 121 of the inner tubular member 120.
Is a cross-sectional view of a large-diameter portion of the stepped hole of the outer tubular member 110 and a large-diameter portion 123 of the inner tubular member 120.

As shown in FIG. 6, the inner peripheral surface of the large-diameter portion of the stepped hole of the outer cylindrical member 110 has a circumferential direction of 180 degrees.
A stopper projection 116 extending vertically
And the overhanging projections 117 are formed one by one. On the other hand, on the outer peripheral surface of the large-diameter portion 123 of the inner cylindrical member 120, projections 123b are formed, each extending vertically in a position 180 degrees apart from each other in the circumferential direction. Outer tubular member 11
When the inner cylinder member 120 and the inner cylinder member 120 are relatively rotated, the projection 123b of the inner cylinder member 120 can get over the projection 117 with a predetermined sense of resistance, but cannot get over the stopper projection 116. And the outer cylindrical member 110 is
Rotation is regulated.

When the projection 123b is located between the stopper projection 116 and the overhang projection 117 as shown in FIG. 6, the outer peripheral surface of the cylindrical portion 115 closes the ejection hole 121b, and the inner peripheral surface of the small-diameter portion 121 is closed. The opening 115a of the cylinder 115 is closed. Then, the outer cylinder member 110 is rotated with respect to the inner cylinder member 120 to move over the projection 123b to get over the projection 117.
The other stopper projection 11 that is 180 degrees away from
7, the opening 115a of the cylindrical portion 115 communicates with the ejection hole 121b, and the ejection port 113 is located in front of the ejection hole 121b.

The skirt tube portion 124 of the inner tube member 120 projects below the peripheral wall portion 111 of the outer tube member 110, and the skirt tube portion 124 and the peripheral wall portion 111
0 is inserted so as to be vertically movable. Vertical ribs 15 extending in the vertical direction are provided on the inner peripheral surface of the central cylindrical portion 151.
A plurality of engagement protrusions 124a inserted between the vertical ribs 151a are formed at the lower end of the outer peripheral surface of the skirt tube portion 124 so as to protrude outward. As shown in FIG. 7, the lower end of the vertical rib 151a becomes thinner as it goes downward, and the upper end of the engagement protrusion 124a becomes thinner as it goes upward. When the pump head 100 moves upward from below, the vertical rib 151a And the engagement protrusion 124a are guided by their respective tapered surfaces.

An annular flange 43 projecting outward is formed on the outer periphery of the stem 40 and substantially at the center in the vertical direction. An annular upright wall 44 is formed on the upper surface of the flange 43.
Is projected upward. The inner peripheral surface of the upright wall 44 is formed as a tapered surface whose diameter increases as it goes upward.

The second piston 60 is fitted on the stem 40 between the flange 43 and the pump head 100 so as to be slightly vertically movable. The second piston 60 has a hollow cylindrical shape with upper and lower openings, and the outermost portion is a seal cylindrical portion 6 that hermetically slides on the inner peripheral surface of the large-diameter cylinder portion 22 of the cylinder member 20.
1, the innermost part is formed in a base cylinder part 62 for externally fitting the stem 40, and the seal cylinder part 61 and the base cylinder part 6 are formed.
Numerals 2 are connected by a stepped cylindrical portion 63 whose section is bent stepwise.

The upper portion of the base cylinder portion 62 is slidably pressed against the inner peripheral surface of the cylindrical valve body 125 of the pump head 100 in an airtight manner. Air holes 64 are provided in the connecting portion between the base cylinder portion 62 and the stepped cylinder portion 63 in a circumferential direction, and the air holes 64 are formed by the relative vertical movement of the pump head 100 and the second piston 60. Open and close. In other words, the pump head 100 and the second piston 60 move up and down relatively, and the cylindrical valve element 125 of the pump head 100 moves the base cylinder portion 62 and the stepped cylinder portion 63.
The air hole 64 is closed when it comes into contact with the connecting portion, and the air hole 64 is opened when the cylindrical valve element 125 is separated from the connecting portion.

The lower end of the base cylinder portion 62 comes into contact with and separates from the inner peripheral surface of the upright wall 44 of the stem 40 due to the relative vertical movement of the stem 40 and the second piston 60. A plurality of vertical grooves 45 extending in the up-down direction are provided on the outer peripheral surface of the stem 40 and in a portion where the base cylinder portion 62 is fitted to the outside, and are distributed in the circumferential direction. The vertical groove 45 is formed such that the lower end of the base cylinder portion 62 is
When the lower end of the base cylinder portion 62 is separated from the large-diameter cylinder portion 22, it communicates with the inside of the large-diameter cylinder portion 22.

A second air suction valve 90 is provided below the base cylinder portion 62.
Has been fixed. The second air intake valve 90 includes an upwardly tapered annular diaphragm 91 that extends radially outward from the lower end. The diaphragm 91 has elasticity. Usually, the outer peripheral edge of the diaphragm 91 is pressed against the lower surface of the stepped cylindrical portion 63 of the second piston 60 to seal it, and the negative pressure in the large-diameter cylinder portion 22 is reduced. The outer peripheral edge of the diaphragm 91 is pulled downward and operates so as to be separated from the stepped cylindrical portion 63.

By the way, the mounting cylinder 150 is attached to the central cylinder 151.
Has a cylindrical rib 152 outside the cylindrical rib 1.
At the lower end of 52, a first air intake valve 80 that seals between the mounting cylinder 150 and the inner peripheral surface of the large-diameter cylinder portion 22 is fixed. First suction valve 8 in contact with large-diameter cylinder portion 22
The zero seal cylinder portion 81 has a tapered cylindrical shape, extends obliquely upward and has elasticity, and the upper end portion of the seal cylinder portion 81 is pulled radially inward by negative pressure in the container body 1. It operates so as to be separated from the inner peripheral surface of the large diameter cylinder portion 22.

The transparent cover 202 is attached to the mounting cylinder 150.
Is detachably attached.

<Operation> Next, the operation of the container with a foam ejection pump according to the first embodiment will be described. 1 and 3
Is a state before the pump head 100 is pushed down, that is, a state in which the pump head 100 is located at the upper limit. FIG. 1 also shows a state in which the ejection hole 121b of the inner cylindrical member 120 in the pump head 100 is closed.

When blowing bubbles, first, the cover 20
2 is removed, the outer cylinder member 110 of the pump head 100 is rotated with respect to the inner cylinder member 120, and the ejection hole 121b of the inner cylinder member 120 communicates with the opening 115a of the outer cylinder member 110.

Before the pump head 100 is pushed down, the liquid suction valve 30 is pushed up by the coil spring 39 via the first piston 50 and the lower valve body 3
1 is separated from the valve seat 24a of the cylinder member 20,
The inside of the small-diameter cylinder portion 24 is in communication with the inside of the container body 1 via the suction pipe 201. The upper valve body 35 of the liquid suction valve 30 is seated on the valve seat 52 of the first piston 50 and closes the upper opening of the first piston 50. Second piston 6
0, the lower end of the base cylinder portion 62 abuts against the upright wall 44 of the stem 40, and the first air suction valve 80 presses against the stepped cylinder portion 63 of the second piston 60 and the large-diameter cylinder portion 22 of the cylinder member 20, The lower end of the cylindrical valve element 125 of the pump head 100 is the second
The air hole 64 is separated from the stepped cylindrical portion 63 of the piston 60.
Is open.

When the pump head 100 is pushed down from this state, the stem 40 and the first piston 50 are lowered integrally with the pump head 100, and as a result, as shown in FIG. 52 to the liquid suction valve 30
Of the first piston 50 is separated, and the upper opening of the first piston 50 is opened. At about the same time, the inside of the small-diameter cylinder portion 24 is pressurized by the lowering of the first piston 50, the liquid suction valve 30 is lowered by the hydraulic pressure in the small-diameter cylinder portion 24, and the lower valve body 31 is seated on the valve seat 24a. Then, the lower opening of the small-diameter cylinder portion 24 is closed. On the other hand, the second piston 6
0 indicates that immediately after the start of the depression of the pump head 100, the pump 40 is stopped by the frictional force between the seal cylinder portion 61 and the large-diameter cylinder portion 22, and the stem 40 descends in this state.
The lower end of the base cylinder portion 62 of the piston 60 is separated from the upstanding projection 44 of the stem 40, and the cylindrical valve body 12 of the pump head 100 is
The lower end of 5 abuts against the stepped cylindrical portion 63 of the second piston 60 to close the air hole 64.

After the lower end of the cylindrical valve element 125 of the pump head 100 abuts against the stepped cylindrical portion 63 of the second piston 60, the second piston 60 is also integrated with the pump head 100, the stem 40, and the first piston 50. And descend.

Thereafter, when the pump head 100 descends, the liquid in the small-diameter cylinder portion 24 pressurized by the first piston 30 moves through the upper opening of the first piston 30 and the vertical grooves 33a, 34a of the liquid suction valve 30. As described above, the liquid is passed through the space between the vertical ribs 42 of the stem 40 and is pushed out above the upper valve body 35, and further pushes up the liquid discharge valve 70 by the liquid pressure to flow into the gas-liquid mixing chamber 46 (see FIG. 2). On the other hand, the air contained in the large-diameter cylinder portion 22 passes between the flange portion 43 and the upright projection 44 of the stem 40 and the lower end of the base cylinder portion 62 of the second piston 60, and passes through the vertical groove 4 of the stem 40.
5 through the inner cylindrical member 12 of the pump head 100.
The gas flows into the gas-liquid mixing chamber 46 through the vertical groove 123a, and further passes through the passage between the casing 131 and the stem 40 of the foaming unit 130.

Then, the liquid and the air merge and mix in the gas-liquid mixing chamber 46 and are sent into the foaming unit 130.
Then, when the liquid passes through the upper and lower two nets 133 of the foaming unit 130, the liquid is foamed, and is extruded into the cylinder 115 of the pump head 100 in a foamed state. This foam
Through the opening 115a of the cylindrical portion 115 and the ejection hole 121b of the small diameter portion 121, the ejection port 1 of the pump head 100
It gushes from 13. FIG. 8 shows the state of blowing bubbles at this time.

When the finger is released from the pump head 100 after the pump head 100 has been pressed down, the small-diameter cylinder 2
4 and the air pressure in the large-diameter cylinder portion 22 decrease, the liquid discharge valve 70 is seated on the valve seat 41, and the first piston 50 and the stem 4
0, the pump head 100 is pushed upward.

Here, the second piston 60 is connected to the stem 40
Immediately after the start of pushing, the stem 40 is stopped by the frictional force between the seal cylinder portion 61 and the large-diameter cylinder portion 22, and in this state, the stem 40 rises, so that the inner peripheral surface of the rising projection 44 of the stem 40 Is pressed against the lower end of the base cylinder portion 62 of
The inside of the large-diameter cylinder portion 22 and the vertical groove 45 of the stem 40 are shut off. At the same time, the lower end of the cylindrical valve body 125 of the pump head 100 is separated from the stepped cylindrical portion 63 of the second piston 60, and the air hole 64 is opened.

After the inner peripheral surface of the upright projection 44 abuts against the lower end of the base cylinder portion 62, the first piston 50 and the stem 40
, The second piston 60 and the pump head 100 rise as a unit.

When the first piston 50 rises, the pressure in the small-diameter cylinder portion 24 becomes negative, whereby the liquid suction valve 30 is pulled up, and the lower valve body 31 is separated from the valve seat 24a.
The inside of the small-diameter cylinder portion 24 communicates with the inside of the container body 1. As a result, the liquid in the container body 1 is sucked into the small-diameter cylinder portion 24 as the first piston 50 rises.

When the liquid is pumped up into the small-diameter cylinder portion 24, the pressure inside the container 1 becomes negative, and as a result, the first
The seal cylinder portion 81 of the air suction valve 80 is the large-diameter cylinder portion 22
Is attracted in a direction away from the inner peripheral surface of the large-diameter cylinder portion 22, and a gap is generated between the large-diameter cylinder portion 22.

Further, as the second piston 60 rises, the inside of the large-diameter cylinder portion 22 also becomes negative, and as a result, the diaphragm 91 of the second air suction valve 90 is attracted downward,
The second piston 60 is separated from the stepped cylindrical portion 63 to form a gap.

First air intake valve 80 and second air intake valve 9
0 operates in this manner, so that the outside air flows from between the central cylindrical portion 151 of the mounting cylinder 150 and the pump head 100.
It is sucked in 50. Part of the air enters the large-diameter cylinder portion 22 through the air hole 64 of the second piston 60, and the other air enters the container body 1 through the air hole 27 of the flange portion 21 of the cylinder member 20. enter. As a result, the inside of the large-diameter cylinder portion 22 and the inside of the container body 1 have the same pressure as the atmospheric pressure, the first piston 50 and the second piston 60 are smoothly raised, and the liquid is pumped up into the small-diameter cylinder portion 24. Is performed smoothly.

After the pump head 100 is returned to the upper limit position, when the container is not used, the outer tubular member 110 of the pump head 100 is rotated with respect to the inner tubular member 120, and the inner tubular member 120 is rotated. The ejection hole 121b is closed by the tubular portion 115 of the outer tubular member 110, and the tubular portion 115
Is closed by the small diameter portion 121 of the inner cylindrical member 120. At this time, the protrusion 123 of the outer tubular member 110
b crosses over the overhanging projection 117 of the inner cylindrical member 120 and abuts on the stopper projection 116.

As described above, the opening 115a and the ejection hole 12
1b, it is possible to prevent the inside of the foam ejection pump 10 from drying, and the foam ejection pump 1 is not ejected.
The foam remaining in 0 does not dry and solidify. Therefore, the foam attached to the net 133 of the foaming unit 130 is not dried and solidified, and the net 133 is not clogged. As a result, the foam can be surely and stably formed the next time the foam is ejected.

[0062]

As described above, according to the present invention,
When not in use, the inside of the foam ejection pump can be sealed, and the foam remaining in the pump without being ejected can be prevented from drying and solidifying. As a result, there is an excellent effect that the foaming performance of the foam ejection pump is not impaired and the foam can always be formed reliably and stably.
In particular, when the foam member is a net, this effect is remarkable.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a container with a foam ejection pump according to a first embodiment of the present invention, showing a state where a pump head is located at an upper limit.

FIG. 2 is a longitudinal sectional view of the container with a foam ejection pump according to the first embodiment of the present invention, showing a state where a pump head is pushed down partway.

FIG. 3 is an enlarged longitudinal sectional view showing a main part of the container with a foam ejection pump according to the first embodiment of the present invention.

FIG. 4 is an enlarged longitudinal sectional view showing a main part of the container with a foam ejection pump according to the first embodiment of the present invention.

FIG. 5 is a partial cross-sectional view of a pump head of the container with a foam ejection pump according to the first embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of a pump head of the container with a foam ejection pump according to the first embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of an engagement portion between a pump head and a mounting cylinder of the container with a foam ejection pump according to the first embodiment of the present invention.

FIG. 8 is a view showing a state of foam ejection of a container with a foam ejection pump according to the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container body 2 neck and neck 10 Bubble ejection pump 22 Large diameter cylinder part (air cylinder) 24 Small diameter cylinder part (liquid cylinder) 46 Gas-liquid mixing chamber 50 First piston 60 Second piston 100 Pump head 104 Spout port 110 Outside Tube member 113 Spout port 115 Tube section (closed body) 115a Opening 120 Inner tube member 121 Small diameter section (bubble flowing section) 121b Spout hole 130 Foaming unit 133 Mesh (foam member)

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-217958 (JP, A) JP-A 5-77050 (JP, U) JP-A 4-15422 (JP, U) JP-A 7- 37959 (JP, U) Japanese Utility Model Application Hei 3-97056 (JP, U) Japanese Utility Model Application Hei 5-54306 (JP, U) Japanese Utility Model Application Showa 60-89143 (JP, U) International Publication No. 92/8657 (WO, A1) ( 58) Surveyed field (Int.Cl. ⁷ , DB name) B65D 47/34 B65D 47/06 B05B 11/06

Claims (2)

(57) [Claims] 1. A foam ejection pump is attached to the mouth and neck of a container body. The foam ejection pump includes a liquid cylinder in which a first piston slides and an air cylinder in which a second piston slides. A pump head provided with an ejection port and connected to the first piston and the second piston to drive both pistons; and a gas-liquid mixture in which the liquid sent from the liquid cylinder and the air sent from the air cylinder merge. Chamber, and a foaming member installed between the jet port and the gas-liquid mixing chamber, and the liquid in the container and the outside air are joined in the gas-liquid mixing chamber by pressing down the pump head, and through the foaming member. In a container with a foam ejection pump that foams and ejects in a foam state from an ejection port, the pump head has a double tube structure including an inner cylinder member and an outer cylinder member that are rotatably fitted to each other. The inner tubular member includes a foam flowing portion located downstream of the foaming member, and the foam flowing portion is provided with an ejection hole, and the outer tubular member is provided with the spray outlet, and includes a foam flowing portion. A closing member that opens and closes the ejection hole by sliding in a liquid-tight manner is provided, and the closing member opens and closes the ejection hole by rotating the outer cylindrical member with respect to the inner cylindrical member. While the ejection port is located in front of the ejection port, a vertical rib is formed in a central cylinder portion of the mounting cylinder screwed to the mouth and neck of the container body, and an engagement projection is formed in the inner cylinder member. A container with a foam ejection pump, wherein the container is inserted between the vertical ribs to serve as a guide. 2. The container with a foam ejection pump according to claim 1, wherein the vertical rib and the engagement projection have a tapered surface for guiding each other.