JP2007275777A - Foam discharge vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foam discharge vessel capable of preventing water from being sucked with the outside air into a cylinder to intrude into an air chamber when the push of a pump head part is released even under such an environment that water is easily brought into contact with the surroundings of the pump head part. <P>SOLUTION: The foam discharge vessel is constituted so that a housing liquid is discharged from a liquid chamber 30 of a cylindrical piston member 15 to a flow passage 21 in the height direction of a hollow pipe 22 by the pushing operation of the pump head part 19 and at the same time, air is discharged from a large diameter air chamber 24 to the flow passage in the height direction of the hollow pipe 22 by the action of an air piston member 16 to be mixed and foamed by a foaming member 20 and to be discharged from the discharge port 26. A skirt-like cover 25 is provided outside of the hollow pipe 22 of the pump head part 19 to slide along the outer peripheral surface of a guide stem 23 and an outside air intake port 32 which is arranged on the upper part of the skirt-like cover 23 and has a larger opening surface area than the gap between the lower end of the skirt-like cover 23 and the outer peripheral surface of the guide step 23 is opened and formed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a foam discharge container, and more particularly, to a foam discharge container in which a foam discharge device is mounted on a mouth neck portion of a container main body to discharge a foamed liquid by mixing the stored liquid with air.

  For example, a liquid cleaning composition or hair preparation is stored, and the pump head is pressed while the container is left without requiring the user to foam the stored liquid discharged from the container body by hand. Various foam discharge containers, such as a pump former container, have been developed in which the contained liquid is discharged in the form of bubbles by operation. In such a foam discharge container, a foam discharger is mounted on the neck of the container body to discharge the contained liquid into a foam by mixing it with air. For example, a foam discharger is a concentric series of a piston that sucks, pressurizes, and discharges stored liquid and a piston that sucks, pressurizes, and discharges air in a base cap portion that is attached to the mouth of the container body. A pump consisting of a single cylinder part arranged and incorporated is provided, and each piston of the pump is operated by pushing the pump head part protruding above the base cap part, and the contained liquid and air are respectively stored in each cylinder part. It is structured such that the liquid is sucked and pressurized and mixed with each other in the confluence space on the outlet side of the pump, and foamed by passing a foaming member such as a mesh ring to discharge the stored liquid to the outside (for example, Patent Document 1).

  Moreover, since foam discharge containers, such as a pump former, are often used around water, such as a bathroom and a washstand, for example, they often get wet with water. Especially in the bathroom, water such as a shower may be applied directly to the container. Further, since the pump head part is often pushed with a wet hand, the opportunity to get wet with water around the pump head part increases. In the foam discharge container, when the pump head part is pressed to release the stored liquid in a foam form and then released, the pump head part is pushed back upward and the inside of the cylinder part becomes negative pressure. As a result, the water around the pump head together with the outside air passes through the gap between the pipe that forms the flow path in the height direction of the pump head and the guide stem of the base cap. Will be aspirated. If the aspirated water accumulates in the air chamber, it is difficult to eliminate the water, which is likely to cause germs.

For this reason, various foam discharge containers designed to prevent water from entering from the gap between the pipe that forms the flow path in the height direction of the pump head part and the guide stem of the base cap part have been developed. (For example, see Patent Document 2 and Patent Document 3). In the pump former container described in Patent Document 2, a skirt-like cover that is slidable along the outer peripheral surface of the guide stem is provided outside the pipe that forms the flow path in the height direction of the pump head portion. In addition to covering the gap between the guide stem and the head of the pump head part, the head of the pump head part is greatly projected outside the skirt-like cover to prevent water from entering the air chamber. Further, in the foam ejector described in Patent Document 3, a skirt-like cover that is slidable along the outer peripheral surface of the guide stem is provided outside the pipe that forms the flow path in the height direction of the pump head portion. In addition to covering the gap between the guide stem and the guide stem, a very small gap is formed on the uppermost outer surface of the guide stem and the innermost lowermost surface of the skirt-like cover close to each other in the initial posture of the pump head. Providing an annular convex portion prevents water from entering the air chamber.
JP 7-315463 A JP 2005-193972 A JP 2004-121898 A

  However, in the conventional foam discharge container configured to prevent water from entering the air chamber, the outside air is formed by a narrow gap between the outer peripheral surface of the guide stem and the inner peripheral surface of the skirt-like cover, to which water easily adheres. Since the air flow path for injecting water is formed, the water adhering to the outer peripheral surface of the guide stem is likely to be directly subjected to a suction force due to the negative pressure inside the cylinder portion, and particularly a large amount of water around the pump head portion. In an environment where water is easily sprayed, water may still be taken into the air chamber together with air. Therefore, even in an environment where a large amount of water can easily touch the periphery of the pump head portion, it is possible to more effectively avoid water being sucked into the cylinder portion together with outside air when the pressure of the pump head portion is released. Development of technology to make it happen is desired.

  In the present invention, even in an environment where a large amount of water is easily touched around the pump head portion, when the pump head portion is released, water is sucked into the cylinder portion together with outside air and enters the air chamber. It aims at providing the foam discharge container which can avoid effectively.

  The present invention is a foam discharge container equipped with a foam discharger for foaming and discharging the stored liquid stored in the neck of the container body by mixing with air. -Shaped guide stem standing from the ceiling and mounted on the mouth of the container body, and a hollow pipe inserted slidably into the guide stem of the base cap portion as a flow path And a large-diameter air chamber and a small-diameter liquid introduction chamber disposed inside the container main body and the base cap portion, and the large-diameter liquid chamber is provided by pressing the pump head portion. A foam member that mixes and foams the air discharged from each of the diameter air chamber and the small-diameter liquid introduction chamber into the flow path of the hollow pipe and the accommodated liquid in the flow path of the hollow pipe, and the pump head portion includes the guide stem Sliding along the outer peripheral surface of A skirt-like cover is disposed outside the hollow pipe, and the skirt-like cover is formed with an outside air intake opening separately from a gap through which the outside air can enter between the outer periphery of the guide stem and the skirt-like cover. The outside air intake has an opening area larger than the area of the gap, and has achieved the above object by providing a foam discharge container having a protective wall extending on the outside and in the vicinity of the circumferential direction. Is.

  According to the foam discharge container of the present invention, water is sucked into the cylinder part together with the outside air when the pressure of the pump head part is released even in an environment where a large amount of water is easily touched around the pump head part. Intrusion into the air chamber can be effectively avoided.

  A foam discharge container 10 according to a preferred embodiment of the present invention is a so-called pump former container. As shown in FIG. 1, the basic structure of the foam discharge container 10 is the same as that of a conventional pump former container. 11 is mounted with a foam discharger 13 for discharging the contained liquid into a foam by mixing it with air. The foam discharger 13 includes, for example, a cylindrical piston member 15 that sucks, pressurizes, and discharges the stored liquid, and a suction, pressurization, and discharge of air on a base cap portion 14 that is attached to the neck 12 of the container body 11. The pump 18 is composed of a single cylinder portion 17 in which the air piston members 16 for performing the above are concentrically arranged in series, and the pump 18 is pushed by pushing the pump head portion 19 protruding above the base cap portion 14. The piston members 15 and 16 are actuated, and the contained liquid and air are sucked and pressurized in the cylinder portion 17 to be mixed with each other in the merge space on the pump outlet side, and passed through the foam member 20 such as a mesh ring. It is provided with a structure in which the contained liquid is discharged to the outside.

  In the conventional pump former container, for example, as shown in FIG. 3, when the pump head part 19 is pressed and the stored liquid is discharged in a foam state and then the pressure is released, the pump head part 19 is pushed back upward. Along with this, the negative pressure inside the cylinder portion 17 causes a gap between the hollow pipe 22 forming the height direction flow path 21 of the pump head portion 19 and the guide stem 23 of the base cap portion 14. In order to prevent the water around the pump head portion 19 from being sucked into the cylinder 17 together with the outside air and preventing the water from accumulating in the air chamber 24, a skirt that covers the gap between the hollow pipe 22 and the guide stem 23 is used. The cover 25 is provided on the outside of the hollow pipe 22, but with a large suction force, through a narrow gap between the outer peripheral surface of the guide stem 23 and the inner peripheral surface of the skirt-like cover 25, Water adhering to the Idosutemu 23 or the like may enter the inside.

  Even if the foam discharge container 10 of this embodiment is in an environment in which a large amount of water easily touches the periphery of the pump head portion 19, the outer peripheral surface of such a guide stem 23 and the inner peripheral surface of the skirt-like cover 25 are It is employed in order to effectively avoid the intrusion of water through a narrow gap therebetween.

  And in the foam discharge container 10 of this embodiment, the foam discharger 13 which foams and discharges the accommodation liquid accommodated in the container main body 11 with air is shown in FIG. The base cap portion 14 in which the cylindrical guide stem 23 is erected from the center portion of the ceiling portion 14a and the hollow pipe 22 that forms the height direction flow path 21 in the guide stem 23 are slidable. And a pump head portion 19 having a discharge port 26 for discharging the contained liquid in the form of foam, and the inside of the neck portion 12 and the base cap portion 14 of the container main body 11, and a large-diameter air chamber 24 and this A cylinder portion 17 including a small diameter liquid introduction chamber 28 whose lower end portion is connected to the suction pipe 27 continuously in series downward from the large diameter air chamber 24, and can be compressed and deformed in the axial direction inside the small diameter liquid introduction chamber 28. Interposed between the hollow pipe 22 and the spring member 29 to transmit the pressing force from the pump head portion 19 to the spring member 29, and the liquid chamber 30 and the valve body 31a, A cylindrical piston member 15 provided with 31b and a large-diameter air chamber which is provided to project radially outward from the cylindrical piston member 15 and whose peripheral edge is slidably in close contact with the inner peripheral surface of the large-diameter air chamber 24 And an air piston member 16 that divides 24 vertically.

  Further, the foam discharger 13 discharges and supplies the stored liquid from the liquid chamber 30 of the cylindrical piston member 15 to the height direction flow path 21 of the hollow pipe 22 by the pressing operation of the pump head portion 19, and the large-diameter air chamber 24, air is discharged and supplied to the height direction flow path 21 of the hollow pipe 22 from the air piston member 16, and the foaming member 20 provided in the height direction flow path 21 of the hollow pipe 22 mixes and foams the pump. The contained liquid is discharged from the discharge port 26 of the head portion 19 in the form of foam.

  Further, the foam discharger 13 is disposed concentrically outside the hollow pipe 22 of the pump head portion 19, and a skirt-like cover 25 is slidably provided along the outer peripheral surface of the guide stem 23. The skirt-like cover 25 has an outside air inlet 32 having an opening area larger than the gap area between the lower end of the skirt-like cover 25 and the outer peripheral surface of the guide stem 23. The gap between the outer peripheral surface and the outer peripheral surface is formed separately, and the outside air inlet 32 is preferably disposed in an upper portion that does not overlap the guide stem 23 when the pump head portion 19 is pressed. Furthermore, the foam discharger 13 has a protective wall 33 that extends above the outside of the outside air inlet 32 and in the vicinity of the circumferential direction.

  In the foam discharge container 10 of the present embodiment, the pump head portion 19 of the foam discharge device 13 is connected to the lower end portion of the hollow pipe 22 through a cylindrical piston member 15 and is connected to the small diameter liquid introduction chamber of the cylinder portion 17. A spring member 29 provided on 28 is biased upward. By pushing down the pump head portion 19 against the urging force of the spring member 29, the cylindrical piston member 15 and the air piston member 16 of the pump 18 are pushed down simultaneously to open the valve body 31a from the liquid chamber 30. An air flow path (not shown) formed along the fitting portion between the hollow pipe 22 and the cylindrical piston member 15 and pressurizing and discharging the stored liquid toward the height direction flow path 21 of the hollow pipe 22. The air is pressurized and discharged from the large-diameter air chamber 24 toward the height direction flow path 21 of the hollow pipe 22 while opening the air. As a result, the discharged stored liquid and air are foamed by passing through the foaming member 20 provided in the height direction flow path 21 in a pressure-mixed state, and foamed from the discharge port 26 of the pump head portion 19. It will be discharged.

  When the pressing of the pump head portion 19 is released, the pump head portion 19 is pushed upward by the urging force of the spring member 29, and the cylindrical piston member 15 and the air piston member 16 of the pump 18 are also pushed up simultaneously, so that the valve body 31b. The stored liquid in the container body 11 is supplied to the liquid chamber 30 through the suction tube 27 and the small-diameter liquid introduction chamber 28 while opening the liquid. Further, through the clearance between the hollow pipe 22 and the guide stem 23 and the intake valve body 35 provided in the air piston member 16, the suction force generated by the large-diameter air chamber 24 of the cylinder portion 17 becomes negative pressure, Air is taken into the large-diameter air chamber 24. By repeating the pressing and releasing of the pump head portion 19 as described above, it is possible to discharge a necessary amount of foamed contained liquid from the discharge port 26.

  In the present embodiment, the skirt-like cover 25 is formed with an outside air intake 32 separately from the gap between the lower end of the skirt-like cover 25 and the outer peripheral surface of the guide stem 23. 32 is preferably disposed on the upper portion that does not overlap the guide stem 23 even when the pump head portion 19 is pressed until the lower end of the skirt-like cover 25 abuts against the ceiling portion 14 a of the base cap portion 14. In addition, the outside air intake 32 is opened with an opening area larger than the area of the gap between the lower end of the skirt-like cover 25 and the outer peripheral surface of the guide stem 23. When the pressure of the pump head portion 19 is released, the outside air is taken into the skirt-like cover 25 through the outside air intake port 32, and further, the clearance between the hollow pipe 22 and the guide stem 23 and the air piston member 16 Air is supplied to the large-diameter air chamber 24 via the intake valve body 35 provided.

  Furthermore, in the present embodiment, a defense wall 33 is provided that extends above the outside of the outside air inlet 32 and in the vicinity of the circumferential direction. In the present embodiment, the protective wall 33 is provided as an umbrella cover that extends downward from the periphery of the top surface portion 19 a that is the upper portion of the pump head portion 19 and covers the upper side and the circumferential direction outside the outside air inlet 32. It has been. By providing the protective wall 33 extending in the upper and circumferential directions outside the outside air inlet 32, an advantage of preventing water from adhering to the vicinity of the outside air inlet 32 can be obtained. In order to exhibit such a function efficiently, the defense wall 33 is preferably further extended by 5 mm or more below the height position of the outside air intake port 32, and particularly preferably extended by 15 mm or more. In addition, it is preferable to maintain an interval of 1.0 to 10 mm between the outer peripheral surface of the skirt-like cover 25 and the inner side surface of the defense wall 33 where the outside air inlet 32 is formed.

  The outside air inlet 32 has an opening area larger than the area of the gap between the lower end of the skirt-like cover 25 and the outer peripheral surface of the guide stem 23, and the outside air has priority over the outside air inlet 32 having a large opening area. Is to be captured. In the present embodiment, in the present embodiment, the gap between the lower end of the skirt-shaped cover 25 and the outer peripheral surface of the guide stem 23 is inserted into the skirt so that the outside air can be taken in from the outside air inlet 32 more effectively. A lower end sealing material 34 is attached to slidably adhere the lower end of the cover 25 to the outer peripheral surface of the guide stem 23. As such a lower end sealing material 34, for example, an O-ring made of a rubber-based material can be used. Since the lower end sealing material 34 is provided at the lower end of the skirt-like cover 25, the lower end of the skirt-like cover 25 is kept in a state where the skirt-like cover 25 is slidable along the outer peripheral surface of the guide stem 23. The gap with the outer peripheral surface of the guide stem 23 can be closed to zero or close to zero, and the suction of outside air and water through the gap is blocked or suppressed, so that the outside air can be smoothly discharged from the outside air inlet 32. Can be captured.

  Here, since the lower end sealing material 34 is provided at the lower end of the skirt-like cover 25, for example, a large amount of water is used around the foam discharge container 10, and the skirt-like shape is formed from the outside air inlet 32 by rebounding the water or the like. When water enters the inside of the cover 25, the gap between the lower end of the skirt-like cover 25 and the outer peripheral surface of the guide stem 23 is closed, so that water is placed on the inner bottom of the skirt-like cover 25. May accumulate. In order to discharge such water in a stationary state where the pump head portion 19 is not pressed, the upper peripheral edge portion of the guide stem 23 is partially cut away, for example, a slit-like drainage cutout (not shown). .) Is preferably provided. Even if such a drain notch is provided, since it is the upper end portion of the guide stem 23, when the pump head portion 19 is pressed, the discharge path by the drain notch is closed by the lower end of the skirt-like cover 25. Even if the inside of the cylinder part 17 becomes negative pressure as the 19 is pushed back upward, it is possible to prevent intrusion of outside air from the drainage notch. Further, as shown in FIG. 2, an outside air valve body 36 that covers the outside air inlet 32 from the inside of the skirt-like cover 25 so as to be opened and closed is provided, and the outside air inlet 32 is opened only when the pressure of the pump head portion 19 is released. As described above, when the foam discharge container 10 is not used, water is prevented from entering the inside of the skirt-like cover 25 from the outside air inlet 32, and water does not collect on the inner bottom portion of the skirt-like cover 25. It can also be done.

  And according to the foam discharge container 10 of this embodiment which has the above-mentioned structure, even if it is in the environment where a lot of water is easy to touch around the pump head part 19, when the press of the pump head part 19 is cancelled | released In addition, it is possible to effectively prevent water from being sucked into the cylinder portion 17 together with the outside air and entering the large-diameter air chamber 24. That is, according to the present embodiment, the foam discharger 13 is provided with the skirt-like cover 25 slidably along the outer peripheral surface of the guide stem 23 on the outer side of the hollow pipe 22 of the pump head portion 19, and An outside air intake 32 having an opening area larger than the area of the gap between the lower end of the skirt-like cover 25 and the outer peripheral surface of the guide stem 23 is formed in the upper part of the skirt-like cover 25. Therefore, in addition to covering the gap between the hollow pipe 22 and the guide stem 23 with the skirt-like cover 25, priority is given to the outside air inlet 32 having a large opening area provided away from the lower end of the skirt-like cover 25. By taking in the outside air, it is possible to effectively reduce the suction force applied to the gap between the lower end of the skirt-like cover 25 and the outer peripheral surface of the guide stem 23, and thereby the periphery of the pump head portion 19. It is possible to prevent water adhering to the air from being sucked through the gap, and to effectively prevent water from being sucked into the cylinder portion 17 and entering the large-diameter air chamber 24. become.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the outside air inlet 32 can be provided at an appropriate position in the upper part away from the lower end of the skirt-like cover 25. Further, it is not always necessary to provide a lower end sealing material at the lower end of the skirt-like cover. In the present embodiment, the outside air intake port 32 is provided on the opposite side of the discharge port 26 in the circumferential direction of the pump head 19, but can be provided at an appropriate position inside the defense wall 33. Furthermore, the protection wall 33 does not necessarily need to be provided as an umbrella cover integrally with the pump head portion 19, and may be a separate member provided that it is disposed so as to cover or cover the outside of the outside air intake port 32. It may be attached to the pump head part, and may be composed of a plurality of members.

It is principal part sectional drawing of the foam discharge container which concerns on preferable one Embodiment of this invention. It is principal part sectional drawing which illustrates the other form of the pump head part in the foam discharge container which concerns on preferable one Embodiment of this invention. It is principal part sectional drawing explaining the conventional foam discharge container.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Foam discharge container 11 Container main body 12 Mouth part 13 of container main body Foam discharge device 14 Base cap part 14a Ceiling part 15 of base cap part Cylindrical piston member 16 Air piston member 17 Cylinder part 18 Pump 19 Pump head part 20 Foaming member 21 Height direction flow path 22 Hollow pipe 23 Guide stem 24 Large-diameter air chamber 25 Skirt-shaped cover 26 Discharge port 27 Suction tube 28 Small-diameter liquid introduction chamber 29 Spring member 30 Liquid chambers 31a and 31b Valve body 32 Outside air intake port 33 Defense wall 34 Lower end sealing material 35 Intake valve body 36 Outside air valve body

Claims (5)

A foam discharge container equipped with a foam discharger that foams and discharges the stored liquid contained in the mouth of the container body by mixing with air,
The foam discharger includes a base cap portion that is installed on a mouth portion of a container body with a cylindrical guide stem standing from a ceiling portion, and a hollow pipe that is slidably inserted into the guide stem of the base cap portion A pump head portion having a discharge port for discharging the contained liquid in the form of a foam as a flow path, a large-diameter air chamber and a small-diameter liquid introduction chamber disposed inside the container body and the base cap portion,
A foam member that mixes and foams the air discharged from the large-diameter air chamber and the small-diameter liquid introduction chamber into the flow path of the hollow pipe and the contained liquid by pressing the pump head portion is provided in the flow path of the hollow pipe,
The pump head portion has a skirt-like cover slidable along the outer peripheral surface of the guide stem disposed outside the hollow pipe,
In the skirt-like cover, an outside air intake is formed separately from a gap allowing the outside air to enter between the outer periphery of the guide stem,
The outside air intake port of the skirt-like cover is a foam discharge container having an opening area larger than an area of the gap and having a protective wall extending on the outer side and in the vicinity of the circumferential direction.   The foam discharge container according to claim 1, wherein the outside air intake port is disposed on an upper portion that does not overlap the guide stem when the pump head portion is pressed.   The foam discharge container according to claim 1 or 2, wherein the protective wall of the outside air intake port is an umbrella cover that extends downward from an upper position of the pump head portion to a height position of the outside air intake port.   A lower end seal material is attached to the gap between the lower end of the skirt-shaped cover and the outer peripheral surface of the guide stem so that the lower end of the skirt-shaped cover can be slidably adhered to the outer peripheral surface of the guide stem. The foam discharge container according to any one of claims 1 to 3. The foam discharge container according to claim 4, wherein a drainage notch is provided at an upper end of the guide stem.

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