JP5041793B2 - Bubble jet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bubble jetting device which is capable of keeping the quality of bubbles jetted when used for a long term high-level by attempting the enhancement of the air-tightness of a supplying pathway. <P>SOLUTION: The bubble jetting device is provided with a base cap 1 which has a penetrated aperture h and is fixed and held so that it is freely removable from a mouth part of a vessel, a pump 2 which has a supplying pathway of the content and air in the vessel and a nozzle head 8 which jets the content and air towards the outside after mixing them with each other to make them foamy. The pump 2 is provided with a large diameter tube 2a and a small diameter tube 2b. An air piston 3 is arranged at the large diameter tube 2a and the air piston 3 is connected with a tubular guide part 9. The outer peripheral wall of a hollow stem 6 is connected with a piston guide part 10. An air piston valve 3b is arranged at the periphery of the tubular guide part 9. The bubble jetting device presses the piston guide part towards the sealing part of the air piston bubble and is further provided with an energizing means 11 to keep the contact portion high airtight. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  This invention has a through-hole connected to the inside and outside of the container, and a base cap that is detachably fixed and held at the mouth of the container, and is suspended and held by the base cap so that the contents and air in the container are individually separated. A pump having two feeding paths for sucking, pressurizing and pumping, and connecting to the pump through a through hole of the base cap and operating the pump to mix and foam the contents and air to the outside. Foam ejector equipped with a nozzle head that spouts toward, especially fine foam for shampoo, body soap, hand soap, various liquid detergents such as face wash, hair conditioner such as set lotion or household detergent Thus, the present invention relates to a foam ejector suitable for ejection, and maintains the quality of the foam ejected from the foam ejector.

  In recent years, containers filled with shampoo, body soap, hand soap, facial cleanser, etc. can be used simply by pushing the nozzle head in order to eliminate the need for foaming of the contents by the user and for simple use. The thing equipped with the foam ejector which can be made to make a fine bubble and to be ejected has prevailed.

  Such a foam ejector is equipped with a pump that incorporates a piston for suction, pressurization, and pressure feeding of contents and a piston (air piston) for suction, pressurization, and pressure feeding of air. The pistons are operated in synchronism, the contents and air are merged in the mixing chamber, and the contents are made to be foamed by passing through a foaming member such as a mesh ring (for example, patent document). 1).

JP 2004-121898 A

  However, in the conventional bubble ejector as described above, when the contents are ejected, the air feeding path and the contents feeding path are connected to each other. If there is variation or wear progresses due to contact between members when used for a long period of time, the airtightness of each supply path will decrease and the contents will enter the air supply path There is also a concern that so-called internal leakage may occur. If internal leakage occurs, the mixing ratio of the contents and air sent to the mixing chamber will be out of the proper range, resulting in a coarse texture of the foam to be blown and the quality of the foam being lowered. There was a fear.

  The object of the present invention is to solve such problems of the prior art, and the purpose of the invention is to improve the airtightness of the feeding route, and even when used over a long period of time. An object of the present invention is to provide a foam ejector that can maintain the quality of the foam to be ejected at a high level.

  In order to achieve the above object, the present invention has a through-hole connected to the inside and outside of a container, a base cap that is detachably fixed to the mouth of the container, and suspended from the base cap. A pump having two feeding paths for sucking, pressurizing and pumping the contents and air separately, and connecting the pump through the through hole of the base cap and operating the pump to mutually exchange the contents and air. In the foam ejector comprising a nozzle head that is mixed and foamed and ejected toward the outside, the pump includes a large-diameter cylindrical portion that forms an air suction, storage, and pressure space, and the large-diameter cylindrical portion A small-diameter cylindrical portion that is integrally connected to the bottom wall and forms a space for suction, storage, and pressurization of contents, and cooperates with the wall portion of the large-diameter cylindrical portion inside the large-diameter cylindrical portion. Bulkhead for forming air suction, storage, and pressurized space And an air piston that is slidable along the wall portion, and a piston that has an internal passage and is slidable along the inner wall of the small-diameter cylindrical portion, and is disposed through the internal passage of the piston. A poppet having a valve body at each of both ends thereof, and a tip portion of the poppet is brought into contact with an end portion of the piston to induce sliding of the piston, while a rear end portion thereof is passed through the through hole of the base cap to the nozzle head. A hollow stem to be coupled and a spring that elastically supports the piston together with the poppet and the hollow stem are arranged, and the air piston is slidably fitted and held along the outer peripheral wall of the hollow stem. It is connected to a cylindrical guide part that opens and closes the air supply path, and the outer peripheral wall of the hollow stem is formed on a piston guide part that projects outward in the width direction. The air piston valve that opens the opening of the partition wall of the air piston only at the time of intake is arranged on the cylindrical outer periphery, and the piston guide part is pressed toward the seal part of the air piston valve. It is a bubble ejector provided with the urging means which maintains a contact site | part in a high airtight state. By adopting such a configuration, the piston guide portion is strongly pressed by the air piston valve, the air tightness of the air supply path is improved, and the contents reliably enter the air supply path. Can be prevented.

  Moreover, in the foam ejector configured as described above, it is preferable that the partition wall of the air piston is in contact with the base cap in the initial posture. As a result, the slidable range of the air piston is limited by the base cap, the pressure of the piston guide portion to the air piston valve is further increased, and the airtightness of the air supply path is further improved. Here, the “initial posture” means a state in which no external force is applied to any part of the foam ejector, and more specifically, a state before the nozzle head is pushed. .

  Furthermore, it is preferable that the biasing means is an elastic member in which one end is in contact with the piston guide portion and the other end is in contact with the large-diameter cylindrical portion. By configuring the urging means in this manner, the airtightness of the air supply path can be maintained at a high level over a long period of time while being easily assembled.

  According to the present invention, it is possible to prevent the internal leakage by maintaining the air tightness of the air supply path, and to maintain the quality of the foam ejected even when used for a long period of time at a high level. Become.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 shows a cross section of a typical foam ejector according to the present invention, and FIG. 2 is an enlarged view of the main part thereof.

  The base cap 1 can be detachably held at the mouth of the container, has a hollow neck 1a in the center of the top wall, and a through hole h connected to the inside and outside of the container is formed inside thereof. .

  A pump 2 is suspended from the lower surface of the base cap 1. The pump 2 is integrally connected to a large-diameter cylindrical portion 2a that forms a suction, storage, and pressurization space for air, and a bottom wall of the large-diameter cylindrical portion 2a to form a suction, storage, and pressurization space for contents. It consists of a small diameter cylinder part 2b.

  An air piston 3 is slidably disposed in the large diameter cylindrical portion 2a. The air piston 3 has a partition wall 3a that forms a space for sucking, storing and pressurizing air in cooperation with the wall portion of the large-diameter cylindrical portion 2a. The partition wall 3a has an opening 3a 'only during intake. An air piston valve 3b to be opened is provided. A piston 4 is slidably disposed along the inner wall of the small diameter cylindrical portion 2b.

Further, the internal passage 4a of the piston 4, the poppet 5 is arranged, the poppet 5 has a valve body 5a for opening and closing the suction port 2b ₁ of the small-diameter cylindrical portion 2b at its lower end, the piston in its upper 4 has a valve body 5b for opening and closing the rear end opening. The hollow stem 6 is disposed so that the front end (lower end) abuts on the piston 4 and the rear end (upper end) projects into the through hole h of the base cap 1. A spring 7 disposed in the small-diameter cylindrical portion 2 b elastically supports the piston 4 together with the poppet 5 and the hollow stem 6 so as to be pushed in.

  In addition, a nozzle 8 is connected to the rear end of the hollow stem 6 in the hollow neck 1a of the base cap 1, and a jet ring 8a that forms an outlet opening of a mixing chamber, which will be described later, inside the nozzle 8, A mesh ring 8b is disposed in the jet ring 8a, which is arranged adjacent to each other and is stretched with a mesh that makes the contents mixed with air fine bubbles.

  The cylindrical guide portion 9 is integrally connected to the partition wall 3a of the air piston 3 at its body portion, and is fitted and held on the outer peripheral wall of the hollow stem 6 so as to be slightly slidable in the vertical direction in the figure. Yes. Further, the lower end thereof is formed thin so as to be easily elastically deformed, and the outer wall at the front end of the thin portion is in contact with an inclined wall 10a ′ of the piston guide portion 10 described later.

From the outer peripheral wall of the hollow stem 6, a piston guide portion 10 is formed so as to protrude outward in the width direction. This is the upper surface of the piston guide portion 10 have an annular convex portion 10a is provided to form the groove interleaving the cylindrical guide portion 9, the inclined wall 10a on the side facing the hollow stem 6 of the convex portion 10a '(See FIG. 2) is formed.

  Further, the air piston valve 3b is disposed on the outer periphery of the cylindrical guide portion 9, and the outer peripheral tip thereof is disposed so as to be in pressure contact with the lower surface of the partition wall 3a beyond the opening 3a '. Furthermore, the piston guide part 10 is pressed toward the thin-walled lower end part of the cylindrical guide part 9 which can be elastically deformed by the urging means 11, and maintains the contact part in a highly airtight state.

  A content feed path 12 is formed at the center of the hollow stem 6, and an air feed path 13 (see FIG. 2) is provided between the outer peripheral wall of the hollow stem 6 and the inner wall of the cylindrical guide portion 9. , A spline-like groove is provided, and the contents and air that have passed through the feeding paths 12 and 13 are sent to the mixing chamber 14. The mixing chamber 14 is provided on the inner side of the rear end portion of the hollow stem 6, and includes an inlet opening 14 a connected to the content supply path 12 and an inlet opening 14 b connected to the air supply path 13 through the internal passage r. , An outlet side opening 14c formed by the jet ring 8a of the nozzle head 8 for sending the mixture of contents and air from the mixing chamber 14, and a check valve 14d for preventing a backflow from the inlet side opening 14a.

  The nozzle head 8 is elastically supported by a spring 7 through a hollow stem 6 and a piston 4 so as to be pushed in, and the state shown in FIG.

  When the nozzle head 8 is pushed from the initial posture, the hollow stem 6, the piston 4, and the poppet 5 move toward the lower end of the small-diameter cylindrical portion 2 b, and the air piston 3 also moves along the hollow stem 6 to the large-diameter cylindrical portion 2 a. Move towards the bottom wall. Here, the air piston 3 has a cylindrical guide portion 9 connected to the air piston 3 only between the air piston valve 3b and the step portion d of the nozzle head 8 along the body portion of the hollow stem 6 with a dimension t (see FIG. 2). It can slide in the vertical direction in the figure.

In the pushing process of the nozzle head 8, the valve body 5b of the poppet 5 is separated from the rear end opening of the internal passage 4a of the piston 4, and the valve body 5a of the poppet 5 comes into contact with the lower surface of the small diameter cylindrical portion 2b for suction. The opening 2b ₁ is closed, the inside of the small diameter cylindrical portion 2b is pressurized, and when the nozzle head 8 is further pushed in, the contents present in the small diameter cylindrical portion 2b pass through the feed path 12 and the check valve 14d and exit from the pump 2. To the mixing chamber 14 on the side.

  On the other hand, with respect to the large-diameter cylindrical portion 2a, the air in the storage space is pressurized by the movement of the air piston 3, and the air applied to the pressurization is also discharged to the mixing chamber 14 through the feeding path 13. The contents and air that have reached the mixing chamber 14 pass through the jet ring 8a and the mesh ring 8b in a gas-liquid mixed state, become foamed, and are ejected to the outside through the internal passages and nozzles of the nozzle head 8. .

  After removing the nozzle head 8 and removing the force applied, the piston 4, the hollow stem 6, and the nozzle head 8 return to the initial posture by the repulsive force of the spring 7.

In this return process, the poppet 5 becomes suction opening 2b ₁ of move according to the movement of the piston 4 small-diameter cylindrical portion 2b is in the open, rear end opening becomes closed in the interior passageway 4a of the piston 4, small-diameter cylindrical portion 2b Due to the negative pressure inside, the contents in the container are sucked into the small-diameter cylindrical portion 2b through the suction port 2b1.

  On the other hand, for the large-diameter cylindrical portion 2 a, the air piston 3 moves together with the piston 4, the hollow stem 6, and the nozzle head 8 with a time delay due to the slide of the dimension t in the cylindrical guide portion 9. The thin lower end portion comes into contact with the inclined wall 10a ′ of the piston guide portion 10 and the air supply path 13 connected to the large-diameter cylindrical portion 2a is cut off. In this case, the inside of the large-diameter cylindrical portion 2a is negatively pressurized. In this state, the valve 3b is opened, and air flows into the large-diameter cylindrical portion 2a through the opening 3a 'at that portion.

  By repeatedly pushing the nozzle head 6 and returning it to the initial position as described above, the contents in the container can be continuously ejected as fine bubbles.

  By the way, as shown in FIG. 3, the foam ejector of the conventional structure is enlarged so that the outer peripheral edge of the lower end portion of the cylindrical guide portion 9 contacts the inclined wall 10 a ′ of the piston guide portion 10. Although the feeding path 13 is cut off, the cylindrical guide portion 9 and the piston guide portion 10 are not sufficiently brought into contact with each other due to the dimensional variation and wear of the portion, and the airtight state can be maintained. There is a possibility that the foam-like contents remaining in the mixing chamber 14 may enter the large-diameter cylindrical portion 2a through the internal passage r and the air supply path 13. When the contents enter the large-diameter cylindrical portion 2a in this way, the amount of air that can be introduced into the large-diameter cylindrical portion 2a in the return process is reduced, and as a result, the air is fed to the mixing chamber. The mixing ratio of the contents and air varies, and fine bubbles cannot be ejected, or the contents that have entered the large diameter cylindrical portion 2a are discharged at the time of ejection, and the bubbles themselves cannot be generated. There was a fear.

  On the other hand, in the foam ejector of the present invention, as shown in FIG. 2, the piston guide portion 10 is pressed toward the thin lower end portion of the cylindrical guide portion 9 by the biasing member 11, so that the piston As a result of maintaining the contact portion between the guide portion 10 and the thin lower end portion of the cylindrical guide portion 9 in a high airtight state, it is possible to prevent the contents from entering the large diameter cylindrical portion 2a and to improve the quality of the foam to be ejected. It can be kept high.

  In the illustrated embodiment, the upper end of the partition wall 3 a of the air piston 3 is brought into contact with the lower end of the base cap 1. As a result, even if the piston guide portion 10 is urged upward by the urging member 11 toward the air piston valve 3b, the air piston valve 3b includes the cylindrical guide portion 9 and the air piston 3 connected thereto. Since the upward movement is restricted by the base cap 1, the contact portion between the piston guide portion 10 and the thin lower end portion of the cylindrical guide portion 9 is maintained in a higher airtight state. . As a result, the contents can be prevented from entering the large-diameter cylindrical portion 2a, and the quality of the foam to be ejected can be kept higher.

  The biasing means 11 is not particularly limited in its material and form as long as it can reliably press the piston guide portion 10, but from the viewpoint of facilitating assembly, as shown in FIG. It is preferable that the elastic member is formed such that the portion abuts against the piston guide portion 10 and the other end abuts against the large-diameter cylindrical portion 2a. In addition, by using the urging means 11 as an elastic member in this way, it is possible to maintain the air tightness of the air supply path at a high level over a long period of time. As the elastic member, a plate spring, a rubber piece or the like can be used in addition to the coil spring shown in FIG.

  FIG. 4 is an enlarged sectional view of an essential part showing an example of another foam ejector according to the present invention. The members common to the previous embodiment are denoted by the same reference numerals.

  In the present embodiment, the configurations of the cylindrical guide portion 9 and the air piston valve 3b are changed from the examples shown in FIGS.

Specifically, between the cylindrical guide portion 9 and the pin scan tons guide portion 10, the air piston valve 3b is disposed so as to support the lower end of the cylindrical guide portion 9. Further, the piston guide portion 10 is pressed toward the seal portion 3b ′ of the air piston valve 3b by the urging means 11, and the contact portion is maintained in a highly airtight state.

  In the returning process after the nozzle head 8 is pushed from the initial posture state, the air piston 3 is moved to the piston 4 with a time delay due to the slide of the dimension t in the cylindrical guide portion 9 for the large diameter cylindrical portion 2a. It moves together with the hollow stem 6 and the nozzle head 8, the seal portion 3b 'of the air piston valve 3b comes into contact with the piston guide portion 10, and the air supply path 13 connected to the large diameter cylindrical portion 2a is blocked. At this time, the inside of the large-diameter cylindrical portion 2a is in a negative pressure state, the valve 3b is opened, and air flows into the large-diameter cylindrical portion 2a through the opening 3a 'at that portion.

  When this configuration is adopted, as shown in FIG. 4, the biasing member 11 presses the piston guide portion 10 toward the seal portion 3b 'of the air piston valve 3b, and the air piston valve 10 is made of an elastomer or the like. As a result, the contact portion between the piston guide portion 10 and the seal portion 3b 'of the air piston valve 3b is maintained in a highly airtight state, so that the contents enter the large-diameter cylindrical portion 2a. Can be prevented, and the quality of the jetted bubbles can be kept high.

  In this embodiment, the upper end of the partition wall 3a of the air piston 3 is brought into contact with the lower end of the base cap 1 as in the previous embodiment. As a result, even if the piston guide portion 10 is urged upward by the urging member 11 toward the air piston valve 3b, the air piston valve 3b includes the cylindrical guide portion 9 and the air piston 3 connected thereto. Since the upward movement is restricted by the base cap 1, the contact portion between the piston guide portion 10 and the seal portion 3b 'of the air piston valve 3b is maintained in a higher airtight state. . As a result, the contents can be prevented from entering the large-diameter cylindrical portion 2a, and the quality of the foam to be ejected can be kept higher.

  As is apparent from the above description, the present invention improves the airtightness of the feeding path, thereby enabling the foam quality to be maintained at a high level even when used over a long period of time. It became possible to provide an ejector.

1 is a cross-sectional view of a typical foam ejector according to the present invention. It is sectional drawing which expanded and showed the principal part of the foam ejector shown in FIG. It is sectional drawing which expanded and showed the principal part of the foam ejector of a prior art. It is sectional drawing which expanded and showed the principal part of the other bubble ejector according to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base cap 1a Hollow neck part 2 Pump 2a Large diameter cylinder part 2b Small diameter cylinder part 3 Air piston 3a Bulkhead 3b Air piston valve 4 Piston 4a Internal passage 5 Poppet 5a Valve body 5b Valve body 6 Hollow stem 7 Spring 8 Nozzle head 8a Jet ring 8b Mesh ring 9 Cylindrical guide portion 10 Piston guide portion 10a Protruding portion 10b 'Inclined wall 11 Energizing means 12 Feeding path 13 Feeding path 14 Mixing chamber 14a Inlet opening 14b Inlet opening 14c Outlet opening 14d Check valve

Claims (4)

A base cap that has a through-hole connected to the inside and outside of the container and is detachably fixed and held at the mouth of the container, and suspended and held by the base cap, and the contents and air inside the container are individually sucked and applied to the container. A pump having two feeding paths for compressing and pumping, and a pump connected to the pump through a through hole of a base cap to operate the pump so that the contents and air are mixed with each other, foamed and ejected to the outside. In a bubble ejector equipped with a nozzle head,
The pump has a large-diameter cylinder part that forms a suction, storage, and pressurization space for air, and a small-diameter cylinder that integrally connects to the bottom wall of the large-diameter cylinder part and forms a suction, storage, and pressurization space for contents. With
An air piston that has a partition that forms a space for suction, storage, and pressurization of air in cooperation with the wall of the large-diameter cylinder inside the large-diameter cylinder, and is slidable along the wall And place
A piston having an internal passage and slidable along the inner wall of the small diameter cylindrical portion, a poppet disposed through the internal passage of the piston and having valve bodies at both ends thereof, and a tip portion A hollow stem in which the piston is brought into contact with the end of the piston to induce sliding of the piston, and the rear end of the piston is connected to the nozzle head through the through hole of the base cap, and the piston can be slid together with the poppet and the hollow stem. Each with a spring for elastic support,
The air piston is fitted and held so as to be slidable along the outer peripheral wall of the hollow stem, and is connected to a cylindrical guide portion that opens and closes the air supply path,
The outer peripheral wall of the hollow stem is connected to a piston guide portion formed to protrude outward in the width direction,
On the outer periphery of the cylindrical guide part, an air piston valve that opens an opening of the partition wall of the air piston only at the time of intake is arranged,
A bubble ejector comprising an urging unit that presses a piston guide portion toward a seal portion of an air piston valve and maintains a contact portion in a highly airtight state.   The bubble ejector according to claim 1, wherein the partition wall of the air piston contacts the base cap in the initial posture.   The foam ejector according to claim 1 or 2, wherein the biasing means is an elastic member having one end abutting against the piston guide portion and the other end abutting against the large-diameter cylindrical portion. The base portion of the air piston valve is disposed between the piston guide portion and the cylindrical guide portion so as to support a lower end portion of the cylindrical guide portion. The foam ejector described.

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