JP2019064681A - Foam discharger and foam discharge container - Google Patents

Abstract

To provide a foam discharger which can effectively prevent infiltration of liquid from a gap between a fitting member and an operation member.SOLUTION: In a foam discharger which has a fitting member 2 where an inward flange 8 is provided to protrude from the upper portion of a fitting cylindrical portion 4 to a neck-like opening portion of a container body, where a lower portion of an operation member 20 having a discharge head 34 to the upper end side is made to insert in a cylinder member 14 which suspends from inside of the fitting member 2 to go up and down freely, where the cylinder member 14 is formed to suspend a liquid cylinder 14b with small diameter from an air cylinder 14a with large diameter, where a liquid piston 22 with small diameter inserted in the liquid cylinder 14b to the lower portion of the operation member 20 and an air piston 32 inserted in the air cylinder 14a are provided, an air introduction passage A is provided to grub in the fitting member 2, and seal means S for water-proof is provided between a guide cylinder portion 9 stood up from the inward flange 8 and the operation member 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a foam dispenser and a foam dispensing container.

As this kind of foam dispenser,
A mounting member having an inward flange attached to the upper end of the mounting cylinder;
A cylinder member which is attached to the inside of the mounting member, and in which a large-diameter air cylinder and a small-diameter liquid cylinder are concentrically arranged vertically in a row;
The piston for liquid sliding in the cylinder for liquid projects from the lower part of the stem outer periphery, and the air piston sliding in the air cylinder is linked to the upper part of the outer periphery of the stem, and the discharge head is fitted to the upper end of the stem. And an actuating member mounted so as to be able to move up and down in a biased state, wherein the liquid in the liquid cylinder and the air in the air cylinder are merged in the gas-liquid mixing chamber by the vertical movement of the actuating member, and generated via the foam member. There is known one configured to bubble and discharge from a discharge port of a discharge head (Patent Document 1).

Japanese Patent Application Publication No. 2004-121889

In the case of Patent Document 1, after the air inside the air cylinder is pumped to the gas-liquid mixing chamber by lowering the actuating member, as the actuating member ascends, a gap between the inner edge of the inward flange and the actuating member is included. Outside air is introduced into the inside of the air cylinder through the air introduction passage. Therefore, if water droplets are attached near the inlet of the air introduction path, there is a possibility that water may be drawn into the air cylinder as the outside air is sucked.
When water is accumulated in the air cylinder in this manner, the effective volume in the air cylinder is reduced, and the amount of air sent from the air cylinder to the gas-liquid mixing chamber is reduced. It may change. Furthermore, if the amount of water accumulated in the air cylinder increases, there is also a possibility that water will be mixed with the fluid sent from the air cylinder to the gas-liquid mixing chamber.

  An object of the present invention is to propose to reduce the above-mentioned disadvantages and to effectively prevent the infiltration of liquid from the gap between the mounting member and the actuating member.

The first means has a mounting cylindrical portion 4 that can be fitted to the mouth and neck of the container body, and a mounting member 2 formed by inward projecting an inward flange 8 from the upper portion of the mounting cylindrical portion 4;
A cylinder member 14 hanging downward from the mounting member 2;
The lower part is inserted into the cylinder member 14 so as to be able to move up and down in an upper biased state, and the upper part including the discharge head 34 is protruded upward from the inside of the inward flange 8;
The cylinder member 14 has a large diameter air cylinder 14a suspended from a small diameter liquid cylinder 14b, and the operation member 20 has an air piston 32 inserted into the air cylinder 14a and the liquid cylinder 14b. The drier 22 has the liquid piston 22 inserted therein, and the descent of the actuating member 20 mixes the air pressure-fed from the air cylinder 14a with the liquid pressure-fed from the liquid cylinder 14b, thereby forming the frothing portion 30. In the foam discharger provided so as to be able to discharge from the discharge head 34 as foam via
An air introducing passage A is formed in the inner surface of the mounting member 2 from the lower side of the mounting cylinder 4 to the inside of the air cylinder 14a,
A guide cylindrical portion 9 surrounding the outer peripheral surface of the actuating member 20 is erected from the inner periphery of the inward flange 8, and the gap B between the guide cylindrical portion 9 and the outer peripheral surface of the actuating member 20 is closed over the entire circumferential direction. A waterproof sealing means S was formed.

  In this means, as shown in FIG. 1, a waterproof sealing means S for closing the gap B between the guide cylinder 9 rising from the inner periphery of the inward flange 8 and the outer peripheral surface of the actuating member 20 over the entire circumferential direction. Form. This can prevent water and foreign matter from entering the air cylinder 14a from the gap B. However, simply sealing the gap may result in insufficient introduction of outside air into the air cylinder 14a. Therefore, the air introduction path A was bored in the mounting member 2.

The "waterproof sealing means" is a means for sealing the gap in order to suppress water immersion from the gap between the mounting member and the actuating member.
The “air introduction path” may be provided in at least one place in the circumferential direction of the mounting member 2 and the air cylinder 14a, but a plurality of places may be provided.
“Drilling the air introduction path” means that the inner peripheral surface of the mounting cylinder 4 is recessed to form a flow path, and for example, a screw formed on the inner surface of the mounting cylinder 4 It includes making part of the circumferential direction of a part longitudinally lack. Thereby, the amount of resin which is a material can be reduced.

The second means has a first means, and the waterproof sealing means S is protruded from one of the inner peripheral surface of the guide cylinder 9 and the outer peripheral surface of the actuating member 20 and It is formed as a skirt-like seal piece 10 in fluid-tight contact.

  In this means, a skirt-like seal piece 10 is provided as the waterproof seal means S. Thereby, the variation in the dimension due to the forming error of the operation member 20 and the guide cylinder portion 9 can be covered by the deformation of the seal piece 10. In the illustrated example, as shown in FIG. 1, the seal piece 10 protrudes from the inner circumferential surface of the guide cylindrical portion 9 and is in contact with the outer circumferential surface of the actuating member 20. It may be provided so as to protrude from the outer peripheral surface and to be in contact with the inner peripheral surface of the guide cylinder 9. The seal piece 10 is preferably formed integrally with a member to which it is attached, but there is no problem in function even if it is separately formed in advance.

  The third means has the second means, and the seal piece 10 divides the upper end portion of the guide cylindrical portion 9 into the inner and outer double parts over the entire circumferential direction on the upper end surface of the guide cylindrical portion 9 By forming an annular cut groove 9a, the inner wall portion of the cut groove 9a is formed.

  In this means, an annular groove 9a is formed on the upper end surface of the guide cylindrical portion 9 so as to divide the upper end of the guide cylindrical portion 9 into two parts in the circumferential direction, thereby forming the groove 9a. The seal piece 10 is formed by the inner cylindrical wall portion. Thereby, the function of the seal piece can be incorporated without increasing the number of parts.

  The fourth means has any one of the first means to the third means, and moves in the lateral direction of the actuating member 20 from one of the inner peripheral surface of the guide cylindrical portion 9 or the outer peripheral surface of the actuating member 20. The annular rib 9b which protrudes

  In this means, an annular rib 9b that restricts the movement of the actuating member 20 in the lateral direction is projected from one of the inner peripheral surface of the guide cylindrical portion 9 or the outer peripheral surface of the actuating member 20. This can prevent undesirable lateral blurring of the actuating member 20 when the actuating member 20 is operated. The annular rib 9 b may be provided on the inner peripheral surface of the guide cylindrical portion 9 or the outer peripheral surface of the actuating member 20 at a location other than the attachment portion of the seal piece 10.

A fifth means is a foam discharge container in which the foam discharger 1 according to any one of the first to fourth means is attached to the mouth and neck of the container body 100, wherein
As the air introducing passage A extending from the lower side of the mounting cylinder 4 into the air cylinder 14a, the air introducing passage A formed on the inner surface of the mounting cylinder 4 is bored on the outer surface of the mouth and neck 101 instead of the air introducing passage. An air introduction path was formed.

  In this means, the object of the invention is a foam discharge container comprising a foam discharger and a container body, and an air introducing passage A extending from the lower side of the mounting cylindrical portion 4 to the inside of the air cylinder 14a. Instead of the air introduction path formed on the inner surface, an air introduction path formed on the outer surface of the mouth and neck portion 101 is formed. Also according to this configuration, the outside air can be suitably introduced from the lower side of the mounting member 2.

According to the invention of the first means, the inner surface of the mounting member 2 is bored with an air introducing passage A extending from the lower side of the mounting cylinder 4 to the inside of the air cylinder 14a and the inner periphery of the inward flange 8 From the above, the guide cylindrical portion 9 surrounding the outer peripheral surface of the actuating member 20 is erected, and a waterproof sealing means S is formed which blocks the gap B between the guide cylindrical portion 9 and the outer peripheral surface of the actuating member 20 over the entire circumferential direction. Therefore, the entry of water and foreign matter into the air cylinder 14a from between the actuating member 20 and the guide cylinder 9 can be effectively suppressed, and the required air supply from the lower side of the mounting cylinder 4 into the air cylinder 14a. Can be secured.
According to the invention of the second means, the waterproof seal means S protrudes from one of the inner peripheral surface of the guide cylindrical portion 9 and the outer peripheral surface of the actuating member 20 and is in fluid tight contact with the other. Since it is formed as a skirt-like seal piece 10, when the actuating member 20 is inserted into the guide cylindrical portion 9, the forming error of the guide cylindrical portion 9 and the actuating member 20 can be covered by the deformation of the seal piece 10 Good sealing performance.
According to the invention of the third means, the seal piece 10 is an annular cutting member which divides the upper end portion of the guide cylindrical portion 9 into the inner and outer double parts over the entire circumferential direction on the upper end surface of the guide cylindrical portion 9 Since the groove 9a is formed by the inner cylindrical wall portion of the cut groove 9a by forming the groove 9a, the seal piece 10 can be integrally incorporated into the configuration of the guide cylindrical portion 9, and the number of parts does not increase. .
According to the invention of the fourth means, since the annular rib 9b for restricting the movement of the actuating member 20 in the lateral direction is protruded from one of the inner peripheral surface of the guide cylindrical portion 9 or the outer peripheral surface of the actuating member 20 The rattling at the time of operation of the member 20 can be reduced.
According to the invention of the fifth means, the waterproof sealing means S is formed, and instead of the air introduction path drilled on the inner surface of the mounting cylindrical portion 4, the outer surface of the mouth and neck 101 is drilled. Since the formed air introduction path is formed, it is possible to prevent the entry of liquid and foreign matter into the air cylinder and to perform the required air supply into the air cylinder.

It is a longitudinal cross-sectional view of the foam dispenser which concerns on 1st Embodiment of this invention. It is a partially expanded sectional view of the foam dispenser of FIG. It is a longitudinal cross section in the state to which the operation member of the foam dispenser of FIG. 1 was dropped. It is a partially expanded sectional view of the foam dispenser in the state of FIG. It is explanatory drawing in the state which made the operation | movement member of the foam discharge container which has a foam discharger of FIG. 1 descent | fall to the middle position. It is a longitudinal cross-sectional view of the foam dispenser which concerns on 2nd Embodiment of this invention. It is a partially expanded view of 3rd Embodiment of the foam discharge container of this invention.

1 to 5 show a first embodiment of a foam dispensing container provided with a foam dispenser according to the present invention.
The foam discharge container comprises a foam discharger 1 and a container body 100.
The foam dispenser 1 includes a mounting member 2, a cylinder member 14, an operating member 20, and a poppet valve body 38. Each of these members can be made of, for example, a synthetic resin or a metal.
For convenience of explanation, general matters in the structure and operation of the present invention will be described first.

  The mounting member 2 has a mounting cylindrical portion 4 in which the first screw portion 6 is formed on the inner surface, and the inward flange 8 is extended from the upper end edge of the mounting cylindrical portion 4. In the example of illustration, the guide cylinder part 9 stands up from the inner peripheral part of the said inward flange 8, and the drooping cylinder part 11 is vertically provided from the said inner peripheral part. However, these structures can be suitably changed. The guide cylindrical portion 9 surrounds the outer peripheral surface of the actuating member 20 via the gap B.

The cylinder member 14 has a large diameter air cylinder 14a whose upper end is fixed to the outer periphery of the rear surface of the mounting member 2, and a small diameter liquid cylinder 14b extends from the lower part of the air cylinder 14a. In the preferred embodiment, the flange portion 14 c attached to the upper end of the air cylinder 14 a is held between the mouth neck 101 and the inward flange 8 via the packing 18. This configuration will be further described later.
A through hole 15 is opened at the upper part of the peripheral wall of the air cylinder 14a.
The fluid cylinder 14 b has a tapered bottom portion with a lower diameter and a smaller diameter which is continuous with the upper straight cylinder portion, and the upper surface of the bottom portion is used as a first fluid valve seat 16. From the bottom, a pipe fitting cylinder 14e for attaching the suction pipe 19 is integrally provided.
A plurality of locking ribs 17 having upward stepped portions for spring locking are provided inward 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 the present embodiment, the actuating member 20 includes a fluid piston 22, a stem 24, a holding cylinder 25, an air piston 32, and a discharge head 34. These structures can be modified as appropriate.

  The piston for fluid 22 has a sliding tubular portion 22b which expands in a skirt shape from the lower end of the vertically oriented fitting tubular portion 22a, and a third valve seat 22c from the upper end of the mating tubular portion 22a. The small diameter cylindrical portion, which is A coil spring c is interposed between the small diameter cylindrical portion and the upward step of the locking rib 17. The sliding cylinder 22b is slidably fitted on the inner surface of the liquid cylinder 14b.

The stem 24 is a cylinder whose upper and lower ends are open, and the lower half of the cylinder is assembled to the outer surface of the fitting cylinder 22a of the liquid piston 22 so that the sliding cylinder 22b protrudes downward from the cylinder wall. At the same time, in the upper half of the cylinder, an air piston 32 (described later) sliding on the inner surface of the air cylinder 14 cooperates to vertically move the inside of the cylinder member 4.
An annular valve seat 24b is formed in the upper half of the cylindrical wall 24a of the stem 24, and a second liquid check valve VL2 is formed by mounting the ball valve b on the valve seat.
Further, a plurality of first longitudinal ridges 24c are vertically provided on the inner surface of the stem between the annular valve seat 24b and the third liquid valve seat 22c. Further, the second air valve seat 24e is protruded outward in the form of an outward flange from the outer surface vertical direction middle portion. Further, on the upper side of the second air valve seat 24e, a plurality of second longitudinal protrusions 24d are formed on the outer periphery of the stem 24.

  The holding cylinder 25 has the lower half cylindrical portion 25a fitted in the upper end portion of the stem 24, and the upper half cylindrical portion 25b protrudes upward from above the stem. In the upper half cylindrical portion 25b, a foam forming portion 30 formed of a single or a plurality of cylindrical bodies in which a mesh is stretched on a cylindrical port is mounted. The lower half cylindrical portion 25a approaches the ball valve b as a valve body pressing means. A flow passage hole 26 communicating with an air passage P described later is formed on the outer surface of the lower half cylindrical portion 25a.

The air piston 32 has a cylindrical valve portion 32a surrounding the stem 24, and a cylindrical piston 32c is extended from the outer periphery of the cylindrical valve portion 32a via a stepped partition 32b. The lower end portion of the cylindrical valve portion 32a and the above-described second air valve seat 24e form a second air check valve VA2.
The cylindrical piston 32 is slidably fitted on the inner periphery of the air cylinder 14a.
The cylindrical valve portion 32a is provided so as to move up and down by a relatively small width between the second air valve seat 24e and the step e of the mounting cylinder portion 35 described later on the outer peripheral surface of the stem 24. ing. Since the above-mentioned second vertical projection 24d is vertically provided on the outer surface of the stem 24, a gap g which is a part of the air passage P is formed between the stem 24 and the cylindrical valve portion 32a. .
Further, a first air check valve VA1 which is an outside air introduction valve is formed in the partition wall 32b. The first air check valve in the illustrated example is formed by the valve hole bored in the partition wall and the elastic valve plate for closing the valve hole from the back side, but the configuration can be appropriately changed.

The discharge head 34 is provided with a mounting cylinder 35 fitted to the outer peripheral upper end of the stem 24 from the back surface of the top plate 34a, and a nozzle 34c is projected laterally from the top of the mounting cylinder 35. ing. From the outer peripheral portion of the top plate 34a, a head peripheral wall 34b is suspended except for the protruding portion of the nozzle.
In the illustrated example, the mounting tubular portion 35 hangs the lower tubular portion 35c having a large inner diameter from the upper tubular portion 35a having a small inner diameter through the intermediate tubular portion 35b. The step e between the intermediate cylindrical portion 35b and the lower cylindrical portion 35c limits the sliding range of the above-mentioned cylindrical valve portion 32a.
The lower cylindrical portion 35c is fitted to the outer surface of the upper portion of the cylindrical valve portion 32a.
On the inner peripheral surface of the intermediate cylindrical portion 35b, a plurality of vertical grooves 37 which extend upward and are continuous with the annular recess are formed.
The upper end portion of the vertical groove 37 is opened inward in the radial direction and is in communication with a gas-liquid mixing chamber R formed in the upper portion of the stem 24. The longitudinal groove 37 and the gap g constitute an air passage P.
An upper half cylindrical portion 25b of the holding cylinder 25 is fitted to a lower portion of the upper cylindrical portion 35a. A plurality of vertical ribs r are vertically provided on the inner surface of the upper cylindrical portion 35a above the upper half cylindrical portion to prevent the foaming portion 30 from being pulled upward.

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 on the upper end side thereof.
The respective locking projections 38a are provided between the locking ribs 17 of the liquid cylinder 14b so as to protrude to a position capable of coming into contact with the lower surface of the coil spring C. Thereby, the poppet valve body 38 can move up and down between the position where the locking projection abuts against the coil spring and the position where the lower surface of the poppet valve body 38 abuts against the first liquid valve seat 16 It is. The lower end portion of the poppet valve body 38 and the first liquid valve seat 16 form a first liquid check valve VL1.
The tapered valve body 38b is locked to the third fluid valve seat 22c. A third liquid check valve VL3 is formed by the tapered valve body 38b and the third liquid valve seat 22c.

When the discharge head 34 is pushed down from the state of FIG. 1, the stem 24 and the piston for liquid 22 are lowered, so the poppet valve body 38 is also lowered to be seated on the valve seat 16 for the first liquid. The valve VL1 closes. Further, the liquid piston 22 descends with respect to the poppet valve body 38, whereby 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 stem 24 is lowered relative to the air piston 32 by the depression of the discharge head 34, the second air check valve VA2 is opened, and the air in the air cylinder 14a passes through the air passage P and the air and liquid It flows into the mixing chamber R. Then, after air and liquid are mixed in the gas-liquid mixing chamber R, the air passes through the frothing portion 30, and bubbles are released from the nozzle 34c.
When the discharge head 34 is released from the depression, the actuating member 20 is raised by the upward biasing force of the coil spring C, and the hydraulic pressure is reduced, whereby the second liquid check valve VL2 is closed and the coil spring C is used. The poppet valve body 38 in contact with the liquid piston 22 biased upward is pulled up, the first liquid check valve VL1 is opened, and the inside of the liquid cylinder 14b is made negative and the liquid in the container 100 is sucked. . Further, as the stem 24 assembled to the liquid piston 22 ascends prior to the air piston 32, the second air check valve VA2 is closed, and thereafter, the stem 24 and the air piston 32 ascend to thereby make the air Negative pressure is generated in the cylinder 14a, and outside air is introduced. The mechanism of the open air introduction will be described later.

  The container body 100 has a mouth and neck portion 101 which stands up from the trunk, and has a second screw portion 102 capable of meshing with the first screw portion 6 on the outer surface of the mouth and neck portion.

  In the present invention, the waterproof sealing means S is formed between the mounting member and the actuating member, and an air introducing passage A is provided from the lower side of the mounting cylinder 4 of the mounting member 2 into the air cylinder 14a. .

The waterproof sealing means S is a means for water-tightly closing the gap B between the inner peripheral surface of the guide cylindrical portion 9 of the mounting member 2 shown in FIG. 1 and the outer peripheral surface of the actuating member 20. “Waterproof” is a means for preventing water from entering the gap B, such as a shower, when the container of the present invention is used, for example, in a bathroom. This prevents water from accumulating in the space above the air piston 32 in the air cylinder 14a.
The waterproof seal means S can prevent not only the water itself but also the entry of foreign substances contained in the water.
In the present embodiment, as described above, the waterproof seal means S is formed as a skirt-like seal piece 10 as shown in FIG. The skirt shape is used to cover dimensional variations due to molding errors of the operating member 20 or the mounting member 2 and to ensure sealing performance. Design the thickness and strength of the seal piece 10 so that it can be formed of a material (such as a synthetic resin) used for the material of a general container and can realize variable formability that can cover dimensional variations due to the molding error. It shall be. If the seal piece is provided so as to be elastically deformed corresponding to the movement of the actuating member, the seal performance is further enhanced.
In the illustrated example, an annular groove 9 a is formed at a predetermined depth on the upper end surface of the guide cylinder 9 at a predetermined distance from the inner edge of the guide cylinder 9. The upper end portion is formed in a double cylindrical shape. The inner cylindrical wall portion of the cut groove 9a is formed into a tapered shape with a small diameter at the upper end to form the seal piece 10. The upper end portion of the seal piece 10 is slidably pressed against the outer peripheral surface of the actuating member 20 in a watertight manner.
The inner cylindrical wall portion of the illustrated cut groove 9a is thinner than the outer cylindrical wall portion of the cut groove 9a, and has a shape that is more easily deformed in response to the variation in the dimensions.
According to the configuration of the present embodiment, the structure of the seal piece 10 can be adopted in the mounting member 2 without increasing the number of parts of the container.
However, this configuration is not necessarily essential. The seal piece 10 may have a structure in which, for example, the mounting cylindrical portion is embedded on the inner surface side of the guide cylindrical portion 9 by insert molding, and a skirt-like portion with a small diameter at the tip is protruded from the mounting cylindrical portion. In this case, the installation location of the seal piece 10 is not limited to the upper portion of the guide cylinder portion 9.
As shown in FIG. 2, the seal piece 10 of the illustrated example is formed by a straight cylindrical lower cylindrical wall portion 10a, a tapered intermediate cylindrical wall portion 10b whose upper side is narrowed, and a straight cylindrical upper cylindrical wall portion 10c. Since the inner peripheral surface of the upper cylindrical wall portion 10c is interviewed with a certain width in the vertical direction with respect to the outer peripheral surface of the actuating member 20, the seal piece 10 is compared with the entire mounting member 2 Although it is a small part, sufficient water tightness can be realized. However, this structure can be changed as appropriate.
Further, in the present embodiment, the stopper 36 whose lower surface is the downward step 36a is formed in the upper portion of the mounting cylinder 35, and the operating member 20 is lowered to the lower limit position relative to the mounting member 2 as shown in FIG. When this is done, the downward step 36a of the stopper 36 and the upper end face of the seal piece 10 are formed to abut on each other (see FIG. 4).

The air introduction passage A is formed of a vertical passage A1 and a horizontal passage A2.
The longitudinal passage A1 includes a removal portion 6a formed by removing at least a part in the circumferential direction of the first screw portion 6 of the inner surface of the mounting cylindrical portion 4. In the example of illustration, in order to further thin the formation part of this notch part, the vertical groove part 6b is drilled in the inner surface of the mounting cylinder part 4. As shown in FIG. However, this structure can be changed suitably, for example, the vertical groove 6b may be omitted.
The removal portion 6 a is formed over the entire first screw portion 6 in the vertical direction. In the illustrated example, as shown in FIG. 3, the four circumferential directions of the first screw portion are intermittently spaced at equal intervals, but the number of intermittent locations can be changed as appropriate, and only one location is omitted. I don't care.
The number of portions 6a and the width in the circumferential direction are designed so that sufficient outside air can be introduced into the air cylinder 14a without impairing the function as a screw. Further, the flow passage of the vertical passage may be expanded by forming a vertical groove in the inner surface of the mounting cylinder corresponding to the removal of the screw.
Further, in the illustrated example, the upper portion of the mounting cylindrical portion 4 is formed in the large inner diameter portion 5, and a part of the large inner diameter portion in the circumferential direction is cut out in a groove shape to connect the notched portion 6a and the lateral passage A2. ing.
The lateral passage A2 is in communication with the air cylinder 14a from the upper end side of the vertical passage A1.
In the illustrated example, the cylindrical spacer 14d having a certain height is erected from the outer end of the flange 14c of the cylinder, and a part of the upper end of the cylindrical spacer is cut away to form the vent ac. In addition, the horizontal grooves 8a in the radial direction are formed on the back surface of the inward flange 8, and the through holes 15 and the horizontal grooves 8a are provided to communicate with the vent ap and the vertical passage A1 which is the outlet of the horizontal passage A2. There is. However, any one of the lateral groove 8a and the cylindrical spacer 14d with the through hole 15 may be omitted. In the illustrated example, the cylinder member 14 is designed such that the upper end surface of the cylinder member 14 and the back surface of the inward flange 8 are separated, and the vent ap is opened between these surfaces. Can be changed as appropriate.
By the air introduction path A, the outside air can be sufficiently introduced from the lower side of the mounting cylinder 4 into the air cylinder 14a.

According to the above configuration, in a state where the foam dispenser 1 is attached to the mouth and neck portion 101 of the container body 100, the gap B between the outer peripheral surface of the guide cylindrical portion 9 of the mounting member 2 and the operation member 20 Therefore, it is restricted that external water is accumulated in the air cylinder 14a through the gap.
From this state, when the discharge head 34 is pushed down, the air piston 32 descends following the stem 24 of the actuating member 20, and outside air passes through the air introduction path A, as shown in FIG. It enters the upper side of the air piston 32. When the air piston 32 falls below the through hole 15, the outside air enters the container body to release the negative pressure in the container body.
A space defined by the air piston 32 and the air cylinder 14 a (the air chamber so that the air piston 32 ascends with the stem 24 of the actuating member when the actuating member is depressed to the lower limit position and then released ) Is negative pressure. As a result, the first air check valve VA1 is opened, and the outside air passes through the air introduction path A and the first air check valve VA1 and enters the air chamber.

  Hereinafter, other embodiments of the present invention will be described. In these descriptions, the description of the same configuration as that of the first embodiment is omitted.

  FIG. 6 shows a discharge container according to a second embodiment of the present invention. In this embodiment, the annular rib 9 b protrudes inward from the inner peripheral surface of the guide cylindrical portion 9. As a result, unexpected lateral movement of the actuating member 20 is restricted, and stable actuating and lowering of the actuating member becomes possible. In the illustrated example, the projection length of the annular rib 9 b is set so that a gap is generated between the inner end of the annular rib 9 b and the outer peripheral surface of the actuating member 20.

  FIG. 7 shows a discharge container according to a third embodiment of the present invention. In this embodiment, instead of providing the removal portion 6a in the first screw portion 6 of the mounting cylindrical portion 4, the removal portion 102a is formed in the second screw portion 102 formed on the outer surface of the mouth and neck 101 of the container body 100. By providing the air introduction path A is formed. Furthermore, the longitudinal groove portion 101a may be provided on the mouth and neck portion in correspondence with the missing portion.

DESCRIPTION OF SYMBOLS 1 ... foam discharger 2 ... mounting member 4 ... mounting cylindrical part 5 ... large internal diameter part 6 ... 1st screw part 6a ... deletion part 6b ... longitudinal groove part 8 ... inward flange 8a ... horizontal groove part 9 ... guide cylinder part 9a ... Cutting groove 9b: Annular rib 10: Sealing piece 10a: Lower cylindrical wall portion 10b: Intermediate cylindrical wall portion 10c: Upper cylindrical wall portion 11: Hanging cylindrical portion 14: Cylinder member 14a: Air cylinder 14b: Cylinder for liquid 14c: Flange portion 14d: cylindrical spacer 14e: pipe fitting cylinder 15: through hole 16: first liquid valve seat 17: locking rib 18: packing 19: suction pipe 20: operating member 22: liquid piston 22a: fitting Tubular portion 22b: Sliding tubular portion 22c: Third liquid valve seat 24: Stem 24a: Cylindrical wall 24b: Annular valve seat 24c: First longitudinal ridge 24d: second longitudinal ridge 24e: second air valve seat 25 ... holding cylinder 25a ... lower half cylinder 25b ... upper half Tubular portion 26: Flow path hole 30: Foaming portion 32: Air piston 32a: Tubular valve portion 32b: Step-like partition 32c: Tubular piston 34: Discharge head 34a: Top plate 34b: Head circumferential wall 34c: Nozzle 35: Mounting For cylinder 35a ... upper cylinder 35b ... intermediate cylinder 35c ... lower cylinder 36 ... stopper 37 ... vertical groove
38: poppet valve body 38a: locking projection, 38b: tapered valve body 100: container body 101: neck and neck 101a: longitudinal groove portion 102: second screw portion 102a: missing portion A: air introduction path A1: longitudinal Passageway A2: Horizontal passage ac: Air vent ap: Air vent B: Gap b: Ball valve c: Coil spring g: Gap P: Air flow path R: Gas-liquid mixing chamber r: Vertical rib S: Sealing means
VA1 ... first air check valve VA2 ... second air check valve VL1 ... first liquid check valve VL2 ... second liquid check valve VL3 ... third liquid check valve

Claims (5)

A mounting member (2) having a mounting cylindrical portion (4) that can be fitted to the mouth and neck of the container body, and inward projecting an inward flange (8) from the top of the mounting cylindrical portion (4);
A cylinder member (14) suspended downward from the mounting member (2);
An operating member (20) having a lower portion inserted in the cylinder member (14) so as to be capable of moving up and down in an upward biased state, and having an upper portion including the discharge head (34) protruded upward from the inside of the inward flange (8) Equipped with and
The cylinder member (14) comprises a large diameter air cylinder (14a) and a small diameter liquid cylinder (14b), and the actuating member (20) is inserted into the air cylinder (14a). It has an air piston (32) and a liquid piston (22) inserted in the liquid cylinder (14b), and is pressure-fed from inside the air cylinder (14a) by the lowering of the actuating member (20). In a foam dispenser, provided with a mixture of air and a liquid pressure-fed from a liquid cylinder (14b) and capable of being discharged from the discharge head (34) as a foam through a foam portion (30),
The inner surface of the mounting member (2) is bored with an air introduction path (A) extending from below the mounting cylindrical portion (4) to the inside of the air cylinder (14a),
A guide cylindrical portion (9) surrounding the outer peripheral surface of the actuating member (20) is erected from the inner periphery of the inward flange (8), and the guide cylindrical portion (9) and the outer peripheral surface of the actuating member (20) A foam dispenser characterized in that a waterproof seal means (S) is formed to close the gap (B) over the entire circumferential direction.   The waterproof seal means (S) is a skirt-like seal piece that protrudes from one of the inner peripheral surface of the guide cylinder portion (9) and the outer peripheral surface of the actuating member (20) and is in fluid tight contact with the other. A foam dispenser according to claim 1, characterized in that it is formed as (10).   The seal piece (10) has an annular cut groove (9a) on the upper end surface of the guide cylinder (9), which divides the upper end of the guide cylinder (9) inward and outward over the entire circumferential direction. The foam dispenser according to claim 2, characterized in that it is formed by forming a cylindrical wall portion on the inner side of the cut groove (9a) by drilling.   An annular rib (9b) for restricting movement in the lateral direction of the actuating member (20) is projected from one of the inner peripheral surface of the guide cylinder portion (9) or the outer peripheral surface of the actuating member (20). The foam dispenser according to any one of claims 1 to 3. A foam discharge container comprising the foam discharger (1) according to any one of claims 1 to 4 attached to the mouth and neck of a container body (100), wherein
As the air introducing passage (A) extending from the lower side of the mounting cylindrical portion (4) to the inside of the air cylinder (14a), instead of the air introducing path drilled on the inner surface of the mounting cylindrical portion (4) A foam discharge container characterized in that an air introduction passage is formed on the outer surface of (101).