JP4749189B2 - Bubble jet - Google Patents

Description

  The present invention contains various liquid detergents such as shampoos, body soaps, hand soaps, facial cleansers, hair conditioners such as set lotions, or household detergents, and the contents are ejected as fine bubbles. It relates to a suitable foam ejector.

  In containers filled with shampoo, body soap, hand soap, face wash, etc., in recent years, the contents have only to be cleaned by simply pushing the nozzle head for the purpose of omitting the foaming operation of the contents and for easy use. There are those equipped with a foam ejector that ejects fine bubbles.

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 almost simultaneously and merged in the outlet passage of the pump and passed through a foaming member such as a mesh ring so that the contents are ejected in the form of bubbles (see, for example, Patent Document 1). .
Patent No. 3285187 specification

  By the way, in the conventional bubble ejector as described above, when the contents are ejected, the air feeding path and the contents feeding path are electrically connected. If there is a long-term use, or if wear progresses between members, the airtightness of each supply path will decrease and the contents will enter the air supply path, so-called internal leakage will occur. There was room for further improvement in this regard.

  The subject of this invention exists in the place which proposes the novel bubble ejector which is high in the sealing performance which can avoid the internal leak mentioned above reliably over a long period of time.

The present invention has a through-hole connected to the inside and outside of a container, a base cap that is detachably fixed and held at the mouth of the container, and suspended from 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. A foam ejector having a nozzle head ejected toward the
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 in the small-diameter cylindrical portion and slidable on 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 A hollow stem that connects the nozzle end to the nozzle head through the through hole of the base cap while guiding the sliding of the piston by contacting the end with the end of the piston, and the piston can slide with the poppet and the hollow stem And springs that elastically support
The air piston is opened and closed by mutual contact and separation with the annular seat that is fitted and held on the outer peripheral wall of the hollow stem so as to be slightly slidable and protrudes from the outer peripheral wall of the hollow stem. And an opening for introducing air into the large-diameter cylindrical portion in the partition wall of the air piston,
A valve fitted and held in the cylindrical guide is disposed on the cylindrical guide,
The valve, alone or together with the cylindrical guide, contacts the annular seat portion and maintains the contact portion in an airtight state, and only when the air piston is integrally connected to the base portion and slides in the return process of the air piston. It is a bubble ejector characterized by comprising a valve body that opens the opening.

  In the foam ejector configured as described above, it is preferable that the valve body is made of a material whose hardness is smaller than a material forming the annular seat portion. Moreover, it is preferable that the said annular seat part has an inner side inclination wall, and provides the convex part which forms a groove part between the outer peripheral walls of a hollow stem.

  It is desirable that the cylindrical guide and the base of the valve are disposed with a gap therebetween, and a tip portion that contacts the annular seat is provided.

  Furthermore, the valve is preferably made of a soft material such as rubber or elastomer.

  Extending the base of the valve with a valve body that opens and closes the air introduction opening formed in the partition wall of the air piston and fitting it to the cylindrical guide, and contacting the base of the valve with the annular seat Since the air supply path is cut off, reliable sealing is possible. In addition, a reliable sealing property can be obtained by forming the valve from a soft material such as rubber or elastomer.

  A double seal can be achieved by providing a gap (thickening portion) between the cylindrical guide and the base portion of the valve and bringing the respective tip portions into contact with the annular seat portion.

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

  In the figure, reference numeral 1 denotes a base cap that can be detachably held in the mouth of the container. The base cap 1 has a hollow neck portion 1a in the center of the top wall, and a through hole h connected to the inside and outside of the container is formed on the inside thereof.

  Reference numeral 2 denotes a pump suspended from the lower surface of the base cap 1. This pump 2 is integrally connected to a large-diameter cylindrical portion 2a that forms an air suction, storage, and pressurization space, and forms a suction, storage, and pressurization space for contents. It consists of a small diameter cylindrical part 2b.

  Reference numeral 3 denotes an air piston slidably disposed in the large-diameter cylindrical portion 2a. The air piston 3 has a partition wall 3a that forms an air suction, storage, and pressure space in cooperation with the wall portion of the large-diameter cylindrical portion 2a. An opening 3b for introducing air into 2a is provided.

A piston 4 is disposed in the small-diameter cylindrical portion 2 b and is slidable along the inner wall thereof. A poppet 5 is disposed through the internal passage 4 a of the piston 4. The poppet 5 has a valve body 5b which 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, to open and close the rear end opening of the piston 4 to its upper end. 6 is a hollow stem in which the front end (lower end) is brought into contact with the piston 4 and the rear end (upper end) is projected into the through hole h of the base cap 1, and 7 is arranged in the small diameter cylindrical portion 2b. It is a spring. The spring 7 elastically supports the piston 4 together with the poppet 5 and the hollow stem 6 so as to be slidable.

  Reference numeral 8 denotes a nozzle head connected to the rear end of the hollow stem 6 in the hollow neck 1a of the base cap 1. The nozzle head 8 is detachably connected to the rear end portion of the hollow stem 6, and a jet ring 8 a that forms an outlet opening of a mixing chamber, which will be described later, and an air that is disposed adjacent to the jet ring 8 a are disposed inside the nozzle head 8. A mesh ring 8b is arranged to make the contents mixed with fine bubbles.

  Reference numeral 9 denotes a cylindrical guide that is fitted and held on the outer peripheral wall of the hollow stem 6 so as to be slightly slidable and movable in accordance with the vertical movement of the hollow stem 6. The cylindrical guide 9 is integrally connected to the partition wall 3a of the air piston 3 at its body portion.

  Reference numeral 10 denotes an annular seat provided so as to protrude from the outer peripheral wall of the hollow stem 6. A convex portion 10a is provided on the upper surface of the annular seat portion 10, and an inclined wall 10a '(see FIG. 2) is formed on the side (inner side) facing the hollow stem 6 of the convex portion 10a.

  Reference numeral 11 denotes a valve (made of a soft member such as rubber or elastomer) that opens and closes an opening 3b formed in the partition wall 3a of the air piston 3. The valve 11 is fitted and held in the cylindrical guide 9 and directly contacts the annular seat 10 to maintain the contact portion in an airtight state. The valve 11 is integrally connected to the base 11a in the returning process of the air piston 3. It consists of the valve body 11b which separates from the partition 3a by sliding (refer FIG. 2, FIG. 3).

  12 is a feed path for the contents formed by the hollow stem 6, 13 is an air feed path formed between the outer peripheral wall of the hollow stem 6 and the inner peripheral wall of the cylindrical guide 9, and 14 is the contents. And air mixing chamber. The mixing chamber 14 is provided on the inner side of the rear end of the hollow stem 6, and includes an inlet opening 14 a connected to the content supply path 12 and an inlet opening connected to the air supply path 13 via the internal passage r. 14b (see FIG. 2), an outlet side opening 14c formed by the jet ring 8a of the nozzle head 8, and a check valve 14d for preventing a backflow from the inlet side opening 13a.

  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 in 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 with the large-diameter cylindrical portion 2 a. Move towards the bottom wall. Here, the air piston 3 is slidable by a dimension t along the trunk portion of the hollow stem 6 between the annular seat portion 10 and the step portion d of the nozzle head 8 (the slight slide and the cylindrical guide 9 connected thereto). (See FIG. 2), and in fact, as shown in FIG. 3, the hollow stem 6 moves along with the hollow stem 6 after moving by the dimension t (moved with a time delay by the dimension t). To do.) At this time, the cylindrical guide 9 is separated from the annular seat portion 10 (the pressurized air supply valve body is opened), and the air supply path 13 is opened to communicate with the large-diameter cylindrical portion 2a.

The pushing process of the nozzle head 8, the valve body 5a of the poppet 5 is closed suction port 2b ₁ in contact with the lower surface of the small diameter cylinder portion 2b, the small diameter tubular portion 2b is pressurized, the additional nozzle heads 8 By pushing, 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 contents present in the small diameter cylindrical portion 2b pass through the discharge path 12 and the check valve 14d on the outlet side of the pump 2. It is discharged into the mixing chamber 14 (see arrow A in FIG. 3).

On the other hand, with respect to the large-diameter cylindrical portion 2a, the space stored by the movement of the air piston 3 is pressurized, and the air applied to the pressure is also fed to the mixing chamber 14 through the feeding path 13 and the internal passage r. (See arrow B in FIG. 3) 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 form an internal passage of the nozzle head 8. Then, it will be ejected to the outside through the nozzle.

  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 content in the container to the small-diameter tubular portion 2b through the suction port 2b ₁ by negative pressure of the inner is aspirated.

  As for the large-diameter cylindrical portion 2a, 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 9, and the cylindrical guide 9 is the annular seat portion 10. The air supply path 13 connected to the large-diameter cylindrical portion 2a in contact with the large-diameter cylindrical portion 2a is cut off. The hole 3b is opened, and air flows into the large-diameter cylindrical portion 2a through the hole 3b.

  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. 4, the conventional foam ejector has a configuration in which the lower end portion of the cylindrical guide 9 is in contact with the convex portion 10 a of the annular seat portion 10 as shown in FIG. It was difficult to select a material to achieve both the rigidity for maintaining the balance and the improvement of the sealing performance. Further, the tip of the cylindrical guide 9 is brought into contact with the annular seat 10 to block the air supply path 13, but the cylindrical guide 9 is made of a relatively hard material. In addition, such a part may not be able to maintain an airtight state depending on, for example, dimensional variations or the progress of wear, and the foamed contents remaining in the mixing chamber 14 may be air-borne. There is also concern about entering the large-diameter cylindrical portion 2a through the feeding path 13.

  As shown in FIG. 2, in the foam ejector of the present invention, the base portion 11a of the valve 11 mounted on the cylindrical guide 9 is in direct contact with the annular seat portion 10, so that the contact portion is maintained in a highly airtight state. .

  In this type of bubble ejector, the base 11a of the valve 11 is in contact with the annular seat 10 alone to block the air supply path 13, but as shown in FIG. By providing a lightening part (notch part) 9a on the inner side of the tip and providing a convex part 11a 'that matches the lightening part 9a on the base part 11a of the valve 11, the mutual connection is further strengthened. Can do.

  FIG. 6 and FIG. 7 are diagrams showing other embodiments of the foam ejector according to the present invention with respect to the main parts. At least one of the cylindrical guide 9 and the distal end portion of the base portion 11a is thinned and a gap m is provided therebetween. When such a configuration is adopted, the distal end of the cylindrical guide 9 and the base portion 11a are provided. At least one of the front ends of the annular seat 10 can be individually contacted with the inner wall surface (see FIG. 6) or the outer wall surface (see FIG. 7) of the convex portion 10a of the annular seat portion 10 for sealing.

  The cylindrical guide 10 can be easily bent and deformed at the time of contact by making the tip portion thin, so that the degree of adhesion of the portion is improved. Further, even if the distal end portion of the base portion 11a of the valve 11 is thin, it is possible to improve the airtightness.

  It is possible to provide a foam ejector having a sufficiently high sealing performance that can reliably block an air discharge path and maintain internal leakage over a long period of time.

It is the figure which showed embodiment of the foam ejector according to this invention. It is the figure which expanded and showed the principal part of the foam ejector shown in FIG. It is the principal part enlarged view which showed the operating condition of the foam ejector shown in FIG. It is a principal part enlarged view of the foam ejector of a conventional structure. It is the figure which showed other embodiment of the foam ejector according to this invention about the principal part. It is the figure which showed further another embodiment of the foam ejector according to this invention about the principal part. It is the figure which showed further another embodiment of the foam ejector according to this invention about the principal part.

Explanation of symbols

1 Base cap
1a Hollow neck 2 pump
2a Large diameter tube
2b Small diameter cylindrical part 3 Air piston
3a Bulkhead
3b Valve 4 Piston
4a Internal passage 5 Poppet
5a Disc
5b Valve body 6 Hollow stem 7 Spring 8 Nozzle head
8a Jet ring
8b Mesh ring 9 Tubular guide
10 Ring seat
10a Convex
10a ′ inclined wall
11 Valve
11a base
11b Disc
11 Content delivery route
13 Air supply route
14 Mixing chamber
14a Inlet opening
14b Inlet opening
14c Outlet opening
14d check valve

Claims (5)

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. A bubble ejector comprising 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 on 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 of the piston of the piston A hollow stem that abuts the end portion to induce the sliding of the piston and connects the rear end portion to the nozzle head through the through hole of the base cap, and the piston is elastically supported to be slidable together with the poppet and the hollow stem. And place each spring
The air piston is opened and closed by mutual contact and separation with the annular seat that is fitted and held on the outer peripheral wall of the hollow stem so as to be slightly slidable and protrudes from the outer peripheral wall of the hollow stem. And an opening for introducing air into the large-diameter cylindrical portion in the partition wall of the air piston,
A valve fitted and held in the cylindrical guide is disposed on the cylindrical guide,
The valve, alone or together with the cylindrical guide, contacts the annular seat portion and maintains the contact portion in an airtight state, and only when the air piston is integrally connected to the base portion and slides in the return process of the air piston. It consists of a valve body which opens the opening of the bubble ejector characterized by the above-mentioned.   The foam ejector according to claim 1, wherein the valve body is made of a material whose hardness is smaller than a material forming the annular seat portion.   The bubble ejector according to claim 1, wherein the annular seat has an inner inclined wall and includes a convex portion that forms a groove with the outer peripheral wall of the hollow stem.   The bubble ejector according to any one of claims 1 to 3, wherein the cylindrical guide and the base of the valve are disposed with a gap therebetween, and each has a tip portion that contacts the annular seat.   The bubble ejector according to claim 1, wherein the valve is made of a soft material such as rubber or elastomer.

Images