JP2019177949A - Foam discharger - Google Patents

Abstract

To provide a foam discharger which can suppress entry of a liquid from the exterior into an air chamber via an air introduction passage.SOLUTION: There is provided a foam discharger in which an air piston 32, which is so provided as to capable of lifting and lowering an intermediate part external surface of a vertical cylindrical body 21 having a piston 22 for a liquid at a lower end thereof, is linked with the cylindrical body, and which comprises an operation member 20 in which a discharge head 37 is provided at an upper end part of the cylindrical body 21. In the foam discharger, an outside air introduction hole I is provided in an inner peripheral part 34a of a partition wall 34 which the air piston 32 has, and an outward flange-shaped wall part 26, which faces a top face of the partition wall 34, is so provided as to be projected outward from the cylindrical body 21. In the foam discharger, blocking means V is provided, and the blocking means blocks communication from an air introduction passage A to the outside air introduction hole I in such a manner that an annular second engaging part 36, which is so provided around the partition wall as to surround the cylindrical body 21, and a first engaging part 27, which is provided around an underside of the outward flange-shaped wall part 26, air-tightly contact each other when pushing down the operation member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a foam dispenser.

As this kind of foam dispenser,
A mounting member provided with an inward flange at the upper end of the mounting cylinder,
A cylinder member mounted in the mounting member, and having a large-diameter air cylinder and a small-diameter liquid cylinder concentrically connected vertically;
A liquid piston that slides in the liquid cylinder protrudes from the lower part of the outer periphery of the piston guide, and an air piston that slides in the air cylinder is linked to the upper part of the outer periphery of the piston guide, and a discharge head is fitted to the upper end of the piston guide. And an actuating member mounted so as to be movable up and down in an upward biased state. There is known a configuration in which foaming is performed via a discharge port of a discharge head (Patent Document 1).

JP 2004-121889 A

In Patent Document 1, after the air inside the air cylinder is pumped to the gas-liquid mixing chamber by the lowering of the operating member, the clearance between the inner edge of the inward flange and the operating member is included as the operating member rises. It was configured to introduce outside air into the air cylinder through an air introduction path. Therefore, if water droplets are attached near the inlet of the air introduction path, moisture may be drawn into the air chamber formed between the air piston and the bottom of the air cylinder as the outside air is sucked.
When water accumulates in the air chamber in this way, the effective volume in the air cylinder is reduced, and this reduces the amount of air sent from the air cylinder to the gas-liquid mixing chamber. It can change. Further, when the amount of water accumulated in the air chamber increases, water may be mixed with the fluid sent from the air cylinder to the gas-liquid mixing chamber.

The first object of the present invention is to propose a foam discharger that reduces the above-mentioned disadvantages and can suppress the intrusion of liquid into the air chamber from the outside via the air introduction path.
The second object of the present invention is to provide a foam discharger that can control the introduction of outside air without attaching an outside air introduction valve element to the outside air introduction hole of the air cylinder.

The first means has a mounting cylinder part 4 that can be fitted to the mouth and neck of the container body, and a mounting member 2 having an inward flange 8 projecting inwardly from the upper part of the mounting cylinder part 4;
A cylinder member 14 suspended downward from the mounting member 2;
An actuating member 20 having a lower portion fitted in the cylinder member 14 so as to be able to move up and down in an upwardly biased state,
The cylinder member 14 has a small-diameter liquid cylinder 14b suspended from a large-diameter air cylinder 14a, and the actuating member 20 is connected to a vertical cylindrical tubular body 21 having a liquid piston 22 at the lower end. In addition, an air piston 32 provided so that the outer surface of the intermediate portion of the cylindrical body can be moved up and down is linked, and a discharge head 37 is provided at the upper end portion of the cylindrical body 21, and the liquid cylinder 14b The piston 22 and the air piston 32 are fitted and inserted into the air cylinder 14a, respectively, and the air pumped from the air cylinder 14a and the liquid pumped from the liquid cylinder 14b are moved by the lowering of the operating member 20. In the foam discharger that is mixed and provided so as to be discharged from the discharge head 37 as foam through the foaming unit 30,
The air piston 32 includes a partition wall 34 that vertically divides the space between the outer surface of the cylindrical body 21 of the operating member 20 and the inner surface of the air cylinder 14a,
An outside air introduction hole I is opened in the inner peripheral portion 34a of the partition wall 34 so that it can communicate with the outside air introduction hole I from the outside through an air introduction path A formed along the inner surface of the mounting member 2.
From the outer peripheral surface of the cylindrical body 21, an outward flange-like wall portion 26 is provided so as to be located above the lifting range of the air piston 32 and face the upper surface of the partition wall 34.
An annular second engagement strip 36 provided around the partition wall 34 so as to surround the cylindrical body 21, and a first engagement strip 27 provided around the lower surface of the outward flange-like wall portion 26. Further, when the operating member 20 is pushed down, there is provided a blocking means V that abuts each other in an airtight manner and blocks communication from the air introduction path A to the outside air introduction hole I.

As shown in FIG. 1, this means is provided with an outside air introduction hole I in the inner peripheral portion 34a of the partition wall 34 of the air piston 32, and an outward flange-like wall portion facing the partition wall 34 from the cylindrical body 21 of the operating member 20. 26 protrudes outward. Thus, when water or foreign matter enters the air cylinder 14a from the air introduction path A, the water or foreign matter enters the space (air chamber K) between the air piston 32 and the bottom of the air cylinder 14a from the outside air introduction hole I. You can restrict entry.
As an installation place of the air introduction path A, it is conceivable to use a gap B between the guide cylinder portion 9 of the mounting member 2 and the operating member 20 as shown in FIG. In this case, even when the foam discharge container equipped with the foam discharge device is left standing in an upright state in a bathroom or the like, water such as a shower may flow down from the gap B and reach the outside air introduction hole I. .
Further, as shown in FIG. 1, the guide tube portion 9 and the actuating member are sealed with appropriate sealing means (seal piece 10 in the illustrated example), and air is introduced along the inner surface of the mounting tube portion 4 of the mounting member 2. Forming the path A is also conceivable. In this case, water or foreign matter that has entered the air introduction path A while the foam discharge container is in an upright state does not directly enter the outside air introduction hole, but temporarily accumulates in the lower part (outer peripheral part 34 c) of the partition wall 34. Water or the like may reach the outside air introduction hole I when the foam discharge container is turned upside down in the use state and returned to the upright state.
By providing the outward flange-like wall portion 26, the risk of water or the like entering the outside air introduction hole I can be reduced.
Further, in this means, instead of disposing the outside air introduction valve element in the outside air introduction hole I, the first engagement strip 27 provided around the outward flange-like wall portion 26 and the second engagement provided around the partition wall 34 are provided. A blocking means V is provided so as to block the communication from the air introduction path A to the outside air introduction hole I by abutting the joint 36 with each other. Thereby, even if it does not provide an external air introduction valve body, inflow of external air can be controlled.

The term “engagement strip” as used herein refers to a portion that extends in the circumferential direction on the facing surfaces of the outward flange-like wall portion and the partition wall and that can contact each other and block communication from the outside to the inside. It shall be said. In the illustrated example, the combination of the engagement groove and the engagement protrusion is illustrated, but for example, a combination of two annular engagement protrusions having slightly different diameters, and a large-diameter engagement protrusion The inner peripheral surface and the outer peripheral surface of the small-diameter engaging convex portion may be provided so as to be in airtight contact with each other.
“Air introduction path formed along the inner surface of the mounting member” means an air introduction path formed between the facing surfaces of the mounting member and the operating member, or the mounting member, the container body, and the cylinder member. Any of the air introduction paths formed between the surfaces may be used. In addition, the structure which abbreviate | omitted the seal piece 10 of this application and was able to inhale external air from both air introduction paths is also contained in the technical scope of this invention.

  The second means has the first means, and one of the first engaging strip 27 and the second engaging strip 36 is formed in the annular engaging concave groove D, and the first engaging strip 27 and The other of the second engaging strips 36 is formed in an annular engaging convex portion P that fits into the engaging concave groove D when the actuating member 20 is lowered, and is inserted into the engaging concave groove D. In this state, the engaging convex portion P is provided so as to engage with one or both of the inner peripheral surface d2 and the outer peripheral surface d1 of the engaging groove D.

  In this means, as shown in FIG. 1, one of the first engaging strip 27 and the second engaging strip 36 is formed in an annular engaging concave groove D, and the first engaging strip 27 and the second engaging strip. The other of the strips 36 was formed on an annular engagement convex portion P that fits into the engagement concave groove D when the actuating member 20 descends. Since the engagement convex portion P is engaged with both the inner peripheral surface d2 and the outer peripheral surface d1 of the engagement concave groove D in a state where the engagement convex portion P is inserted into the engagement concave groove D, the air introduction path A to the outside air introduction hole I Can be blocked more reliably.

The third means includes the first means or the second means, and the partition wall 34 is provided with an inner peripheral portion 34a that opens the outside air introduction hole I and the second engagement strip 36. The outer peripheral portion 34c is provided lower than the intermediate portion 34b.
The outward flange-like wall portion 26 extends outward from the intermediate portion 34b of the partition wall 34, and the surrounding cylinder portion 28 surrounding the blocking means V is suspended from the outer peripheral end of the outward flange-like wall portion 26. did.

  In this means, as shown in FIG. 2, the partition wall 34 has an outer peripheral portion compared to an inner peripheral portion 34 a that opens the outside air introduction hole I and an intermediate portion 34 b that surrounds the second engagement strip 36. In the configuration in which the portion 34 c is provided low, the outward flange-like wall portion 26 extends outward from the intermediate portion 34 b of the partition wall 34, and the surrounding cylinder portion 28 extends from the outer peripheral end of the outward flange-like wall portion 26. Is drooping. This makes it more difficult for water or the like that has entered from the air introduction path A to reach the outside air introduction hole I.

According to the first aspect of the invention, the outer surface facing the upper surface of the partition wall 34 of the air piston 32 is positioned above the elevation range of the air piston 32 from the outer peripheral surface of the cylindrical body 21 of the operating member 20. Since the flange-like wall portion 26 is protruded, the inflow of water and foreign matter from the outside air introduction hole I opened in the inner peripheral portion of the partition wall of the air piston 32 can be restricted, and the tubular body is formed in the partition wall 34. When the annular second engaging strip 36 provided so as to surround 21 and the first engaging strip 27 provided on the lower surface of the outward flange-like wall portion 26 push down the operating member 20. Are provided with a blocking means V that shuts the communication from the air introduction path A to the outside air introduction hole I so that the outside air introduction valve I is not installed in the outside air introduction hole I. Inflow can be controlled.
According to the invention relating to the second means, one of the first engagement strip 27 and the second engagement strip 36 is formed in the annular engagement groove D, and the first engagement strip 27 and the second engagement. The other of the strips 36 is formed in an annular engaging convex portion P that is inserted into the engaging concave groove D when the actuating member 20 is lowered, and is engaged in the inserted state in the engaging concave groove D. Since the engagement convex portion P is provided so as to engage with one or both of the inner peripheral surface d2 and the outer peripheral surface d1 of the mating recess D, the air extends over the entire circumference of the first engagement strip 27 and the second engagement strip 36. Communication from the introduction path A to the outside air introduction hole I can be more reliably blocked.
According to the invention relating to the third means, the partition wall 34 has an outer peripheral portion as compared with an inner peripheral portion 34 a that opens the outside air introduction hole I and an intermediate portion 34 b that is provided with the second engaging strip 36. The outward flange-like wall portion 26 extends outward from the intermediate portion 34b of the partition wall 34, and the blocking means V is provided from the outer peripheral end of the outward flange-like wall portion 26. Since the surrounding cylinder part 28 is hung down, it is difficult for water to reach the engaging portion between the first engaging strip 27 and the second engaging strip 36 when the operating member 20 is pushed down. It is possible to further ensure the effect of preventing water from entering.

It is a longitudinal cross-sectional view of the foam discharger which concerns on embodiment of this invention. It is a principal part enlarged view of the foam discharger of FIG. It is explanatory drawing which shows the 1st step of the use condition of the foam discharger of FIG. It is explanatory drawing which expands and shows a part of step shown in FIG. It is explanatory drawing which shows the 2nd step of the use condition of the foam discharger of FIG. It is explanatory drawing which shows the 3rd step of the use condition of the foam discharger of FIG. It is a longitudinal cross-sectional view which shows the modification of the foam discharger which concerns on embodiment of this invention.

1 to 7 show a foam discharger according to an embodiment of the present invention.
This foam discharger includes a mounting member 2, a cylinder member 14, an operation member 20, and a poppet valve body 38. Each of these members can be formed of, for example, a synthetic resin or a metal.

The mounting member 2 has a mounting cylinder part 4 for fitting to the mouth and neck part 101 of the container body 100, and an inward flange 8 extends from the upper end edge of the mounting cylinder part 4. On the inner surface of the illustrated mounting cylinder portion 4, a screw portion 6 is formed for screwing onto the outer surface of the mouth and neck portion 101. In the present embodiment, the guide tube portion 9 is erected from the inner peripheral portion of the inward flange 8.
In the present embodiment, an air introduction path A that extends along the inner surface of the mounting member 2 is formed while airtightly closing the gap B between the guide tube portion 9 and the outer peripheral surface of the operating member 20.
First, as shown in FIG. 2, the guide tube portion 9 has an annular groove 9a drilled at a certain depth from the upper end surface of the tube wall at a certain distance from the inner edge of the guide tube portion. The upper end part of the guide cylinder part 9 is made into the double cylinder shape. A cylindrical wall portion inside the kerf 9a is formed in a tapered seal piece 10 having a small upper end, and the upper end of the seal piece 10 is slidable and airtight on the outer peripheral surface of the operating member 20. Press contact. Thereby, entry of water or foreign matter from the gap B can be prevented. These structures can be appropriately determined.
As shown in FIG. 1, the air introduction path A includes a vertical passage A1 formed on the inner surface of the mounting cylinder portion 4 and a horizontal passage A2 formed on the outer periphery of the lower surface of the inward flange. As shown in FIG. 2, the vertical passage A <b> 1 has a portion in the circumferential direction of the screw portion that is linearly removed, and the vertical groove portion 7 is formed on the inner surface of the cylinder wall of the mounting tube portion 4 so as to match the notch portion 6 a. It is made by drilling. However, this structure is changed as appropriate, and for example, a notch portion may be provided in the screw portion on the outer surface of the mouth and neck portion 101 of the container body 100. The lateral passage A2 will be described later.

The cylinder member 14 has a large-diameter air cylinder 14a whose upper end is fixed to the outer peripheral portion of the back surface of the mounting member 2, and a small-diameter liquid cylinder 14b extends from the lower portion of the air cylinder 14a. In a preferred illustrated example, as shown in FIG. 2, a collar portion 14 c attached to the upper end of the air cylinder 14 a is sandwiched between the mouth neck portion 101 and the inward flange 8 via a packing 18. A cylindrical spacer 14d is erected from the collar 14c in the illustrated example, and the collar with the cylindrical spacer is sandwiched between the mouth neck and the inward flange together with the packing. A vent hole (not shown) that forms the lateral passage A2 may be formed in a part of the cylindrical spacer in the circumferential direction.
A through hole 15 is opened in the upper peripheral wall of the air cylinder 14a.
The liquid cylinder 14 b has a tapered bottom portion having a small diameter at the lower end that is continuous with the upper straight cylinder portion, and the upper surface of the bottom portion serves as a first liquid valve seat 16. A pipe fitting cylinder 14e for attaching the suction pipe 19 is integrally suspended from the bottom.
A plurality of locking ribs 17 having upward stepped portions for spring locking are provided inwardly projecting from the inner peripheral surface of the liquid cylinder 14b from the tapered portion to the lower end portion of the straight cylinder portion.

  In this embodiment, the actuating member 20 includes a cylindrical body 21, an air piston 32, and a discharge head 37.

  In the present specification, the cylindrical body 21 refers to a vertical cylindrical member that protrudes outwardly from the outer peripheral surface of an outward flange-shaped wall described later. In the present embodiment, the cylindrical body 21 is formed of a liquid piston 22, a piston guide 23, a stem 24, and a holding cylinder 29 as shown in FIG. 2, but these structures are changed as appropriate. It is also possible to include a cylinder portion for mounting the discharge head described later.

  The liquid piston 22 has a sliding cylinder part 22b that expands in a skirt shape from the lower end of the vertical fitting cylinder part 22a, and the third liquid valve seat 22c from the upper end of the fitting cylinder part 22a. The small-diameter cylindrical portion is protruding upward. A coil spring c is interposed between the small diameter cylindrical portion and the upward stepped portion of the locking rib 17. The sliding cylinder portion 22b is slidably fitted to the inner surface of the liquid cylinder 14b.

The piston guide 23 is a cylindrical body whose upper and lower ends are open, and the lower half of the cylindrical body is arranged on the outer surface of the fitting cylindrical part 22a of the liquid piston 22 so that the sliding cylindrical part 22b protrudes below the cylindrical wall. In addition, an air piston 32 (described later) that slides on the inner surface of the air cylinder 14 is linked to the upper half of the cylinder so that the cylinder member 4 can be moved up and down.
An annular valve seat 23b is formed in the upper half of the cylindrical wall 23a of the piston guide 23, and a ball valve b is placed on the valve seat to form the second liquid check valve VL2.
A plurality of first vertical ridges 23c are vertically provided on the inner surface of the piston guide between the annular valve seat 23b and the third liquid valve seat 22c. Further, an air valve seat 23e is projected in an outward flange shape from the middle portion of the outer surface in the vertical direction. Further, on the upper side of the air valve seat 23e, a plurality of second vertical protrusions 23d are formed on the outer periphery of the piston guide 23, and as shown in FIG. A gap g1 is formed between them.

The stem 24 has a vertical cylinder portion 25 that connects the piston guide 23 and the discharge head 37. In the illustrated example, the vertical cylindrical portion 25 is formed so as to hang down from the upper cylindrical portion 25a having a small inner diameter through the intermediate cylindrical portion 25b to the lower cylindrical portion 25c having a large inner diameter, and the cylindrical wall 23a of the piston guide 23 is formed. Is fitted to the inner surface of the intermediate cylinder portion 25b, and the upper cylinder portion 25a of the vertical cylinder portion 25 is fitted to the inner surface of a mounting cylinder portion 37b of the discharge head 37 described later. The lower cylindrical portion 25c is fitted to the outer surface of the upper portion of a cylindrical valve portion 33, which will be described later, so as to be movable up and down. A step e between the intermediate cylinder portion 25b and the lower cylinder portion 25c limits a sliding range of a cylindrical valve portion 33 described later.
A plurality of vertical grooves g2 extending upward are formed on the inner peripheral surface of the intermediate cylinder portion 25b. The lower end of the vertical groove g2 communicates with the upper end of the gap g1, and the vertical groove g2 and the gap g1 form a ventilation channel G. Further, the upper end of the vertical groove g2 opens to the inside in the radial direction and communicates with a gas-liquid mixing chamber R formed in the upper part of the piston guide 23. This will be described later.
An upper half cylinder part 29b, which will be described later, is fitted to the lower part of the upper cylinder part 25a. Above the upper half cylinder portion, a plurality of vertical ribs r are provided vertically on the inner surface of the upper cylinder portion 25a to prevent the foaming portion 30 from coming out upward.
An outward flange-like wall portion 26 is projected outwardly from the lower end of the vertical cylindrical portion 25, which will be described later.

The holding cylinder 29 has a lower half cylinder portion 29a fitted in the upper end portion of the piston guide 23 and an upper half cylinder portion 29b protruding upward from the piston guide.
Inside the upper half cylinder part 29b, a foaming part 30 made of a single cylinder or a plurality of cylinders in which a mesh is stretched around the cylinder port is mounted.
The lower half cylinder portion 29a is close to the ball valve b as a valve body pressing means. A channel groove u communicating with the ventilation channel G is formed on the outer surface of the lower half cylinder part 29a.

The air piston 32 has a cylindrical valve portion 33 surrounding the piston guide 23, and a cylindrical piston 35 extends from the outer periphery of the cylindrical valve portion 33 via a stepped partition wall 34. The cylindrical piston 32 is slidably fitted to the inner periphery of the air cylinder 14a so that an air chamber K is formed between the air piston 32 and the bottom of the air cylinder 14a.
The partition wall 34 in the illustrated example is configured to be sequentially lowered from the inner peripheral portion 34a to the outer peripheral portion 34c via the intermediate portion 34b. An outside air introduction hole I is opened in the inner peripheral portion 34a. In the existing bubble discharger including Patent Document 1, an outside air introduction valve body that opens and closes the outside air introduction hole is mounted on the lower surface of the inner peripheral portion, but in the present invention, the provision of the valve body is omitted, Instead, a blocking means V described later is provided.
The cylindrical valve portion 33 is provided on the outer peripheral surface of the piston guide 23 so as to move up and down with a relatively small width between the air valve seat 23 e and the step e of the vertical cylindrical portion 25.
The lower end of the tubular valve portion 33 is in contact with the air valve seat 23e, and the tubular valve portion 33 and the air valve seat 23e form an air check valve VA. On the downstream side of the air check valve VA, a gap g1 which is a part of the ventilation channel G is formed between the cylindrical valve portion 33 and the cylindrical wall 23a of the piston guide 23.

The discharge head 37 has a mounting cylinder portion 37b suspended from the center of the back surface of the top plate 37a. The mounting cylinder portion 37b is fitted to the outer peripheral portion of the stem 24 and the mounting cylinder portion. A nozzle 37c protrudes laterally from the top of 37b.
A vertical rib-shaped stopper 37d protrudes from the outer surface of the upper end portion of the mounting cylinder portion 37b.
In a preferred illustrated example, a stopper member T indicated by an imaginary line in FIG. 1 may be provided between the guide tube portion 9 and the back side of the discharge head 37 so as to be detachable from the mounting tube portion 37b.

The poppet valve body 38 has a plurality of locking projections 38a provided at the lower end portion thereof, and a tapered valve body 38b formed at the upper end side thereof.
Each of the locking protrusions 38a protrudes between the locking ribs 17 of the liquid cylinder 14b to a position where it can contact the lower surface of the coil spring C. As a result, the poppet valve body 38 can move up and down between a position where the locking projection contacts the coil spring and a position where the lower surface of the poppet valve body 38 contacts the first liquid valve seat 16. It is. A first liquid check valve VL <b> 1 is formed by the lower end portion of the poppet valve body 38 and the first liquid valve seat 16.
The tapered valve body 38b is locked to the third liquid valve seat 22c. The tapered valve body 38b and the third liquid valve seat 22c form a third liquid check valve VL3.

When the discharge head 37 is pushed down from the state of FIG. 1, the piston guide 23 and the liquid piston 22 are lowered, so that the poppet valve body 38 is also lowered and seated on the first liquid valve seat 16, thereby The stop valve VL1 is closed. Further, when the liquid piston 22 is lowered with respect to the poppet valve body 38, the third liquid check valve VL3 and the second liquid check valve VL2 are opened. Then, the high-pressure liquid in the liquid cylinder flows into the gas-liquid mixing chamber R. Further, since the piston guide 23 is lowered relative to the air piston 32 due to the push-down of the discharge head 37, the air check valve VA is opened, and the air in the air cylinder 14a passes through the ventilation channel G. It flows into the liquid mixing chamber R. And after air and a liquid mix in the gas-liquid mixing chamber R, it passes through the foaming part 30, and a bubble is discharge | released from the nozzle 37c.
When the pushing down of the discharge head 37 is released, the actuating member 20 is raised by the upward biasing force of the coil spring C, and the hydraulic pressure is lowered, whereby the second liquid check valve VL2 is closed and the coil spring C The poppet valve body 38 that is in contact with the upwardly biased liquid piston 22 is pulled up, the first liquid check valve VL1 is opened, the liquid cylinder 14b becomes negative pressure, and the liquid in the container body 100 is sucked. . In addition, the piston guide 23 assembled to the liquid piston 22 is lifted prior to the air piston 32 so that the air check valve VA is closed. Thereafter, the air piston 32 is lifted together with the piston guide 23, so that the air The inside of the cylinder 14a is made negative pressure, and outside air is introduced. The outside air introduction mechanism will be described later.

In the present invention, the outward flange-like wall portion 26 protrudes outward from the lower portion of the vertical cylindrical portion 25 of the stem 24. However, this configuration can be changed as appropriate. For example, instead of omitting the stem, the mounting cylinder is suspended from the main body of the discharge head 37 as a part of the cylindrical body 21, and the lower portion of the mounting cylinder is It is connected to the upper part of the piston guide, and a fitting cylinder part (not shown), which is a separate body, is inserted between the mounting cylinder part and the guide cylinder part to be fitted to the lower part of the mounting cylinder part. The outward flange-like wall portion may be protruded outward from the lower end of the fitting tube portion. In this case, the fitting cylinder part is also a part of the cylindrical body. In addition, the outward flange-like wall part 26 shall be installed so that it may be located above the raising / lowering range of the said air piston 32. As shown in FIG.
The outward flange-like wall portion 26 extends outward from the inner peripheral portion 34a and the intermediate portion 34b of the partition wall 34, and the surrounding cylinder portion 28 is suspended from the outer periphery of the outward flange-like wall portion.
A second engagement strip 36 is provided at the intermediate portion 34 b of the partition wall 34, and a first engagement strip 27 is provided at a location facing the intermediate portion of the outward flange-like wall portion 26, as the actuating member 20 is lowered. It is provided so as to abut against the airtightly.
In the present embodiment, the first engaging strip 27 is formed in the annular engaging convex portion P hanging from the outward flange-like wall portion 26, and the second engaging strip 36 is formed in the annular engaging concave groove D. Yes. However, the first engaging strip 27 is formed as an engaging groove that is recessed in the lower surface of the outward flange-like wall portion 26, and the second engaging strip 36 is formed on the engaging convex portion protruding upward from the upper surface of the partition wall 34. It doesn't matter.
In a preferred illustrated example, the step wall S between the intermediate portion 34b and the outer peripheral portion 34c of the partition wall 34 is extended upward, and the side surface of the extension s is used as the outer peripheral surface d1 of the engaging groove D. At the same time, the side surface of the step between the intermediate portion 34b and the inner peripheral portion 34a is used as the inner peripheral surface d2 of the engaging groove D.
And when the operation member 20 descend | falls, it forms so that the engaging convex part P which is the 1st engaging strip 27 may contact | abut to the outer peripheral surface d1 of the said engagement ditch | groove D, and may be engaged. Thereby, an airtight close contact state is realized over the entire circumference of the first engagement strip 27 and the second engagement strip 36, and communication from the air introduction path A to the outside air introduction hole I is blocked.
The outer peripheral surface d1 of the illustrated engaging groove D is an inclined surface that is inclined upward and outward, so that even if there is a slight error in forming the first engaging strip 27 and the second engaging strip 36. The function of blocking the communication with the outside air introduction hole I is not impaired.
In the illustrated example, as shown in FIG. 4, it is designed to take a distance between the engaging convex portion P and the inner peripheral surface d2 of the engaging concave groove D in the inserted state of the engaging convex portion P. . A vertical rib d3 is provided around the inner peripheral surface d2 of the engaging groove D.
In addition, you may provide the said engaging convex part P so that it may replace with the outer peripheral surface d1 of the engagement ditch | groove D, and the inner peripheral surface d2 of the engagement ditch | groove D. FIG. In this case, the vertical rib d3 is omitted. Further, the engaging convex portion P may be provided so as to engage with both the outer peripheral surface d1 of the engaging concave groove D and the inner peripheral surface d2 of the engaging concave groove D.
The combination of the first engagement strip 27 and the second engagement strip 36 is provided with the blocking means V for blocking the communication from the air introduction path A to the outside air introduction hole I. Therefore, as in the prior art, the outside air introduction hole I This eliminates the need for attaching an outside air introduction valve body to the mounting space, and eliminates the trouble of mounting work, and also eliminates the inconvenience that the valve function is impaired due to the outside air introduction valve body falling off. Since the first engagement strip 27 is integrally formed as a part of the outward flange-like wall portion 26 and the second engagement strip 36 is integrally formed as a portion of the partition wall 34, the outside air introduction valve body is attached as a separate part. Compared to the case, the number of parts can be reduced.

  The surrounding cylinder portion 28 has a function of surrounding the blocking means V, and extends downward from the extension portion s of the stepped wall portion S as shown in FIG. By providing the surrounding cylinder portion 28, it is difficult for water to enter the intermediate portion 34b side of the partition wall 34 from the side, but the air bypasses the lower side of the surrounding cylinder portion 28 as indicated by the dotted line in FIG. Thus, it is easy to flow into the outside air introduction hole I, and the entry of water can be suppressed without hindering the introduction of outside air.

In the above configuration, in the state shown in FIG. 1, the first engagement strip 27 and the second engagement strip 36 are separated from each other, and the air introduction path A and the outside air introduction hole I communicate with each other. In this state, even if water enters the upper side of the partition wall 34 via the air introduction path A, the outward flange-like wall portion 26 covers the upper part of the inner peripheral portion 34a and the intermediate portion 34b of the partition wall 34. Water hardly enters the outside air introduction hole I.
When the discharge head 37 is pushed down from the state of FIG. 1, the cylindrical body 21 is further lowered with respect to the air piston 32, and as described above, the air check valve VA is opened, The second engagement strips 36 come into contact with each other to block communication from the air introduction path A to the outside air introduction hole I (see FIG. 3). When the discharge head 37 is further pushed down in this state, the pressure inside the air chamber K becomes high, so that the air in the air chamber K is supplied with the air check valve VA and the ventilation channel G as shown by the arrows in FIG. Through the gas-liquid mixing chamber R.
When the push-down of the discharge head 37 is released, as shown in FIG. 6, the cylindrical body 21 rises with respect to the air piston 32, whereby the air check valve VA is closed, and the first engagement strip 27 and the first The two engaging strips 36 are released. Then, due to the negative pressure in the air chamber K, the outside air is sucked into the outside air introduction hole I from the air introduction path A through the space between the partition wall 34 and the outward flange-like wall portion 26.

FIG. 7 shows a modification of the present embodiment. In this example, instead of the guide tube portion 9 with a seal piece in FIG. 1, a guide tube portion 9 having no seal piece is provided, and an inner surface of the guide tube portion 9 and a part of the operation member 20 (in the illustrated example). The air introduction path A is defined as a gap B between the outer surface of the vertical cylindrical portion 25 of the stem and the lower portion of the cylindrical portion 37b for mounting the discharge head. Accordingly, in the configuration of the first embodiment, the structure of the longitudinal flow path (removal part 6a and longitudinal groove part 7) formed on the inner surface of the mounting cylinder part 4 is omitted, and a normal screw structure is formed. The structure of the lateral groove portion that is continuous with the longitudinal flow path is also omitted.
In the aspect in which the gap between the outer surface of the operating member 20 and the inner surface of the guide tube portion 9 is the air introduction path A, when the outside air introduction hole I is opened in the inner peripheral portion 34a of the partition wall 34 of the air piston 32 described above, Liquid easily enters the air chamber from the outside air introduction hole.
In order to solve this, in the present invention, the outward flange-like wall portion 26 protrudes outward from the lower portion of the vertical cylindrical portion 25 of the stem to the outside of the intermediate portion 45b of the partition wall 34, thereby Flowing water can be guided from the gap between the outer surface and the guide tube portion to the outer peripheral portion 34 c of the partition wall 34 through the upper surface of the outward flange-like top wall portion 26. And since the said outer peripheral part 34c is formed lower than the inner peripheral part 34a and the intermediate part 34b of the partition wall 34, the water which fell to the outer peripheral part 34c can be kept away from the external air introduction hole I, Therefore, from the external air introduction hole I, The possibility of flooding can be reduced.
In the present embodiment, the upper surface of the outward flange-like wall portion 26 is inclined downward and outward, so that the liquid flowing from the air introduction path A in the guide tube portion 9 travels along the inclined surface. Thus, it is possible to easily flow to the outer peripheral portion 34c of the partition wall 34.

2 ... Mounting member 4 ... Mounting cylinder
6 ... Screw part 6a ... Notch part 7 ... Vertical groove part 8 ... Inward flange
9 ... Guide cylinder 9a ... Cut groove 10 ... Seal piece
DESCRIPTION OF SYMBOLS 14 ... Cylinder member 14a ... Air cylinder 14b ... Liquid cylinder 14c ... Gutter part 14d ... Cylindrical spacer 14e ... Pipe fitting cylinder 15 ... Through-hole 16 ... First liquid valve seat 17 ... Locking rib 18 ... Packing 19 ... Pipe for suction 20 ... Actuating member 21 ... Cylindrical body 22 ... Piston for liquid 22a ... Fitting cylinder part 22b ... Sliding cylinder part 22c ... Valve seat for third liquid 23 ... Piston guide 23a ... Cylindrical wall 23b ... Ring valve Seat 23c ... 1st vertical protrusion 23d ... 2nd vertical protrusion 23e ... Valve seat 24 for air 24 ... Stem 25 ... Vertical cylinder part 25a ... Upper cylinder part 25b ... Intermediate cylinder part 25c ... Lower cylinder part 26 ... Outward flange shape Wall part 27 ... 1st engagement strip 28 ... Cover cylinder part 29 ... Holding cylinder 29a ... Lower half cylinder part 29b ... Upper half cylinder part 30 ... Foaming part 32 ... Air piston 33 ... Cylindrical valve part 34 ... Septum 34a ... Inner peripheral part 34b ... Intermediate part 3 c ... outer peripheral portion 35 ... tubular piston 36 ... second Kakarigojo 37 ... discharge head 37a ... top plate 37b ... mounting cylindrical portion 37c ... nozzle 37d ... stopper
38 ... Poppet valve body 38a ... Locking protrusion, 38b ... Tapered valve body 100 ... Container body 101 ... Mouth and neck part 101a ... Vertical groove part 102 ... Second screw part 102a ... Deletion part A ... Air introduction path A1 ... Vertical Passage A2 ... Horizontal passage B ... Gap b ... Ball valve c ... Coil spring D ... Engagement ditch d1 ... Outer peripheral surface d2 ... Inner peripheral surface d3 ... Vertical rib e ... Step G ... Ventilation channel g1 ... Gap g2 ... Vertical Groove K ... Air chamber I ... Outside air introduction hole P ... Engaging projection R ... Gas-liquid mixing chamber r ... Vertical rib S ... Step wall portion s ... Extension portion T ... Stopper member u ... Channel groove V ... Blocking means VA ... Check valve for air
VL1: First valve check valve VL2: Second liquid check valve VL3: Third liquid check valve

Claims (3)

A mounting member (2) having a mounting cylinder portion (4) that can be fitted to the mouth-neck portion of the container body, and having an inward flange (8) projecting inwardly from an upper portion of the mounting cylinder portion (4);
A cylinder member (14) suspended downward from the mounting member (2);
An operating member (20) in which a lower part is fitted in a cylinder member (14) so as to be movable up and down in an upwardly biased state;
The cylinder member (14) has a small-diameter liquid cylinder (14b) suspended from a large-diameter air cylinder (14a), and the actuating member (20) has a liquid piston (22) at the lower end. An air piston (32) provided so that the outer surface of the intermediate portion of the cylindrical body can be moved up and down is linked to the vertical cylindrical body (21) having the discharge head at the upper end portion of the cylindrical body (21). (37), the liquid piston (22) is inserted into the liquid cylinder (14b), and the air piston (32) is inserted into the air cylinder (14a). When the member (20) is lowered, the air fed from the air cylinder (14a) and the liquid fed from the liquid cylinder (14b) are mixed, and the discharge head ( 37) In the foam dispenser provided so as to be capable of being discharged,
The air piston (32) includes a partition wall (34) that bisects the space between the outer surface of the cylindrical body (21) of the operating member (20) and the inner surface of the air cylinder (14a),
An outside air introduction hole (I) is opened in the inner peripheral portion (34a) of the partition wall (34), and the outside air is supplied from outside through an air introduction path (A) formed along the inner surface of the mounting member (2). It is possible to communicate with the introduction hole (I),
From the outer peripheral surface of the cylindrical body (21), an outward flange-like wall portion (26) is provided so as to be positioned above the lifting range of the air piston (32) and facing the upper surface of the partition wall (34). ,
An annular second engaging strip (36) is provided around the partition (34) so as to surround the cylindrical body (21), and is provided on the lower surface of the outward flange-like wall (26). The first engagement strip (27) is airtightly abutted with each other when the actuating member (20) is pushed down, and shuts off the communication from the air introduction path (A) to the outside air introduction hole (I). A foam dispenser comprising (V).   One of the first engagement strip (27) and the second engagement strip (36) is an annular engagement groove (D), and the first engagement strip (27) and the second engagement strip (36). ) Are formed in annular engaging projections (P) that fit into the engaging grooves (D) when the actuating member (20) is lowered, and the inside of the engaging grooves (D). It is characterized in that the engagement convex part (P) is provided so as to engage with one or both of the inner peripheral surface (d2) and the outer peripheral surface (d1) of the engagement concave groove (D) in the inserted state. The foam dispenser according to claim 1. The partition wall (34) has an outer peripheral portion compared to an inner peripheral portion (34a) that opens the outside air introduction hole (I) and an intermediate portion (34b) that is provided with the second engagement strip (36). (34c) is provided low,
The outward flange-like wall portion (26) extends outward from the intermediate portion (34b) of the partition wall (34), and the blocking means (from the outer peripheral end of the outward flange-like wall portion (26)). The foam discharger according to claim 1 or 2, characterized in that a surrounding cylinder part (28) surrounding V) is suspended.