JP2008307478A - Foam dispenser - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foam discharger exhibiting excellent sanitation by preventing the propagation of bacteria or the corruption of water collected inside an air chamber for a long period even when the water enters to the air chamber. <P>SOLUTION: The foam discharger 10 forms foam by moving a pump head part 19 to press a base cap part 14 fixed to a vessel main body 11 to open a first flow passage 32 for sending a liquid content from a liquid chamber 30 to a mixing chamber 13 and a second flow passage 33 for sending air from the air chamber 24 to the mixing chamber 13 to mix the liquid content with the air. A foam generation member 20 is provided in a flow passage 21 from the mixing chamber 13 down to a discharge port 26. A check valve 35 opened by making the pressure of the inner part negative and communicating with an outside air taking-in flow passage 34 when the pressing of the pump head 19 is released and restored is provided in the air chamber 24. A closing part 36 for closing the second flow passage 33 is provided and a fine flow passage 37 for passing the liquid content through a closing part 36 to make the liquid content in the mixing chamber 13 flow-in is formed in the air chamber 24 when the pressure is made negative. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a foam dispenser, and more particularly, to a foam dispenser that is used by being attached to a mouth-neck portion of a container body and ejects the contained internal solution into a foam by mixing with air.

  For example, liquid cleaners and hair preparations are stored, and the pump head unit is pressed while the container is left without requiring the user to bubble the contents discharged from the container body by hand. Accordingly, various foam discharge containers such as a pump former container that discharges the content liquid in the form of foam have been developed. In such a foam discharge container, a foam discharger is mounted on the mouth neck of the container body to discharge the content liquid into a foam by mixing it with air. For example, the foam discharger is a concentric series of a piston that sucks, pressurizes, and discharges the content liquid and a piston that sucks, pressurizes, and discharges the content liquid on the base cap portion that is attached to the mouth of the container body. There is a pump consisting of a single cylinder part arranged and incorporated, and each piston of the pump is operated by pushing the pump head part protruding above the base cap part, and the liquid and air in each cylinder part It is structured such that the liquid is sucked and pressurized and mixed with each other in the merging space and passed through a foam generating member such as a mesh ring to form a foam and the content liquid is discharged to the outside (see, for example, Patent Document 1). .

  Moreover, since foam discharge containers, such as a pump former container, are often used around water, such as a bathroom and a washstand, they often get wet with water. Especially in the bathroom, water such as a shower may be applied directly to the container. In addition, there are cases where it falls into a bag or the like and gets wet with water at a washing place. Furthermore, since the pump head part is often pushed with a wet hand, the periphery of the pump head part often gets wet with water. When the foam discharger presses the pump head part and discharges the liquid content in a foam form and then releases the pressure, the inside of the cylinder part is negatively pressurized as the pump head part is pushed back upward. Thus, outside air is sucked into the air chamber in the cylinder portion through a gap between the hollow pipe forming the longitudinal flow path extending in the height direction of the pump head portion and the guide stem of the base cap portion. When the outside air is sucked into the air chamber, the water around the pump head portion and the base cap portion is often sucked together with the outside air. If the aspirated water accumulates in the air chamber, it tends to cause various germs or cause spoilage. In particular, in the foam discharge container in which the content liquid is repeatedly stored in the container main body by refilling or the like and the foam discharge device is used for a long period of time, the probability of rot increases.

For this reason, various foaming containers designed to prevent water from entering from the gap between the hollow pipe of the pump head part and the guide stem of the base cap part have been developed (for example, Patent Document 2, (See Patent Document 3). In the pump former described in Patent Document 2, a skirt-like cover that is slidable along the outer peripheral surface of the guide stem is provided on the outer side of the hollow pipe of the pump head portion so that a gap between the hollow pipe and the guide stem is provided. In addition to covering, the head of the pump head portion 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 on the outer side of the hollow pipe of the pump head portion, and the gap between the hollow pipe and the guide stem is provided. By providing annular protrusions that cover the gap and that form a very small gap close to each other in the initial posture of the pump head portion on the outermost end outer surface of the guide stem and the lowermost end inner surface of the skirt-like cover. It is designed to prevent water from entering the air chamber.
JP 7-315463 A JP 2005-193972 A JP 2004-121898 A JP 2006-31474 A

  However, in the conventional foam discharger such as a pump former that prevents the water from entering the air chamber due to the above suction, the container is placed in an environment where the container is overturned or the outer periphery of the container is washed. And the function of preventing the suction of water is not sufficiently exhibited, and it is difficult to completely block the intrusion of water into the air chamber. On the other hand, by adding an antibacterial agent to the inner surface of the air chamber, a foam discharger has been developed that prevents germs from growing inside the air chamber where water has accumulated and has improved hygiene ( For example, refer to Patent Document 4), when the content liquid is repeatedly stored in the container body by refilling or the like, and the foam dispenser is used over a long period of time, the antibacterial agent applied to the inner surface of the air chamber Antibacterial action is weakened, making it difficult to maintain hygiene.

  Even if water enters the air chamber, the present invention prevents the bacteria from growing in the air chamber where the water has accumulated or the water decays over a long period of time, and exhibits excellent hygiene. An object of the present invention is to provide a foam dispenser that can be used.

  The present invention includes a head portion that is provided so as to be able to reciprocate with respect to a cap portion that is attached to a mouth portion of a container body, and when the head portion is pressed, an internal solution is sent from a liquid chamber to a mixing chamber. The foam discharger is configured to open a flow path and a second flow path for sending air from an air chamber to the mixing chamber and to mix the content liquid sent to the mixing chamber with the air. In addition, a bubble generating member is provided in a flow path from the mixing chamber to the discharge port, and the air chamber has a negative pressure when the head portion is released when the pressure of the head portion is released. A check valve that communicates with the outside air intake passage that is opened by the air passage and a closing portion that closes the second passage, and the air chamber has a negative pressure when the negative pressure is reached. A fine channel is formed through which the liquid in the mixing chamber flows through the blocking portion. By providing a dispenser is obtained by achieving the above object.

  According to the foam discharger of the present invention, even if water invades into the air chamber, it prevents bacteria from growing in the air chamber in which water has accumulated or water from decaying over a long period of time. Excellent hygiene can be demonstrated.

  A foam discharger 10 according to a preferred embodiment of the present invention is a pump former that is used by being attached to a so-called pump former container. As shown in FIG. This is equipped with a function of discharging the content liquid into a foam by mixing it with air. That is, the foam discharger 10 includes a cylindrical piston member 15 that is attached to a base cap portion 14 attached to the neck portion 12 of the container body 11 and performs suction, pressurization, and discharge of the content liquid, air suction, It has a pump 18 composed of a single cylinder part 17 in which air piston members 16 that perform pressurization and discharge are concentrically arranged in series, and a pump head part 19 protruding above the base cap part 14 is provided. The piston members 15 and 16 of the pump 18 are actuated by pushing in, and the liquid and air are sucked and pressurized in the cylinder portion 17 and mixed with each other in the merge space on the pump outlet side, and a foam generating member such as a mesh ring. 20 is allowed to pass through to form a foam and is discharged from the discharge port 26 to the outside.

  In the pump former as a conventional foam discharger, when the pump head part 19 is pushed back upward when the pump head part 19 is pressed and the stored liquid is discharged in a foam state after releasing the pressure, Due to the negative pressure inside the cylinder part 17, the pump head together with the outside air passes through a gap between the hollow pipe 22 constituting the foaming flow path 21 of the pump head part 19 and the guide stem 23 of the base cap part 14. Water around the portion 19 and the base cap portion 14 is sucked into the cylinder portion 17, and water tends to accumulate in the air chamber 24. In order to avoid such suction of water, various contrivances have been made conventionally. However, if the container is dropped into water or placed in an environment where the outer periphery of the container is washed, It is difficult to completely prevent intrusion.

  In the foam discharger 10 according to the present embodiment, even when water around the pump head portion 19 and the base cap portion 14 is sucked into the cylinder 17 and the water is accumulated in the air chamber 24, germs are generated inside the air chamber 24. It has been adopted in order to effectively avoid the growth and the decay of water over a long period of time.

  And the foam discharger 10 of this embodiment has the pump head part 19 provided so that a reciprocation is possible with respect to the base cap part 14 with which the neck part 12 of the container main body 11 was mounted | worn, and this pump head part 19 is pressed. Thus, the first flow path 32 that sends the internal solution from the reduced volume chamber 30 to the mixing chamber 13 and the second flow path 33 that sends air from the reduced volume chamber 24 to the mixing chamber 13 are opened. The foam former is made into a foam by mixing the content liquid sent to the mixing chamber 13 and air, and is provided with a foam generating member 20 in the foaming flow path 21 leading from the mixing chamber 13 to the discharge port 26, The air chamber 24 is provided with a check valve 35 that communicates with an outside air intake passage 34 that is opened when the pressure of the pump head portion 19 is released and the pump head portion 19 is restored to become negative pressure. And the second flow path 33 A closing portion 36 (see FIGS. 2A to 2C) that is closed is provided, and the air chamber 24 passes through the closing portion 36 when the negative pressure is reached, and the contents of the mixing chamber 13. A fine channel 37 through which the liquid flows is formed (see FIG. 3). Note that the fine flow path 37 has a flow path that is larger than the cross-sectional area of the check valve 35 in a state where the check valve 35 that is in communication with the outside air intake flow path 34 is opened due to the negative pressure of the air chamber 24. It is a channel with a small cross-sectional area.

  In addition, the foam discharger 10 according to the present embodiment includes a base cap portion 14 that is installed on the mouth portion 12 of the container body 11 with a cylindrical guide stem 23 standing from the ceiling portion 14 a, and the base cap portion 14. A pump head portion 19 having a hollow pipe 22 slidably inserted into the guide stem 23 and having a discharge port 26 for discharging the contained liquid in the form of foam, the neck portion 12 and the base cap portion 14 of the container body 11. A cylinder portion 17 composed of a large-diameter air chamber (air chamber) 24 and a small-diameter liquid introduction chamber 28, a cylindrical piston member 15 that slides along the inner peripheral surface of the small-diameter liquid introduction chamber 28, and this A piston portion 38 that is provided so as to project radially outward from the cylindrical piston member 15 and that slides along the inner peripheral surface of the large-diameter air chamber 24. Road 33 and closure part 36 is provided in the joint portion 39 of the cylindrical piston member 15 and the air piston member 16 of the piston 38.

  Further, the foam dispenser 10 according to the present embodiment has an internal solution as an antiseptic or antibacterial agent, for example, benzoic acid, benzoic acid pantothenyl ethyl ether, alkyldiaminoethylglycine hydrochloride, salicylic acid, sorbic acid, dehydroacetic acid. , Trichlorohydroxydiphenyl ether, paraoxybenzoate, phenoxyethanol, phenol, sodium lauryldiaminoethylglycine, isopropylmethylphenol, benzalkonium chloride, benzethonium chloride, chlorhexidicin hydrochloride, chlorhexidine gluconate, orthophenylphenol, alkyl isobromide Quinolinium, thymol, trichlorocarbanilide, halocarban, hinokitiol, 2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-y Thiazoline-3-one, 1,2-benzisothiazolin-3-one, polylysine, zinc salts, it includes a like silver salt may be formulated by a combination of a plurality thereof.

  In the foam discharger 10 of the present embodiment, the pump head portion 19 is provided in the small diameter liquid introduction chamber 28 of the cylinder portion 17 with a cylindrical piston member 15 fitted and connected to the lower end portion of the hollow pipe 22 interposed therebetween. The spring member 29 is biased upward by the action of the spring member 29. 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 also pushed down simultaneously, and the ball valve 31a moves upward, The first flow path 32 is opened. As a result, the liquid content is pressurized and discharged from the liquid chamber 30 formed inside the cylindrical piston member 15 toward the foaming channel 21 in the hollow pipe 22. Further, a second flow path 33 (FIG. 5) as an air flow path formed along the joint portion 39 between the cylindrical piston member 15 and the air piston member 16 and the fitting portion 40 between the hollow pipe 22 and the cylindrical piston member 15. 2 (a) to (c)) can be circulated by opening the closing portion 36, and the air in the large-diameter air chamber 24 is pressurized and discharged toward the foaming flow path 21 in the hollow pipe 22. The stored liquid and air discharged toward the foaming flow path 21 are mixed under pressure in the mixing chamber 13 to form a mixed liquid, and pass through the foam generating member 20 provided on the downstream side of the mixing chamber 13. After foaming, the liquid is discharged in a bubble form from the discharge port 26 of the pump head portion 19.

  On the other hand, if the pressing of the pump head portion 19 is released, the pump head portion 19 is pushed upward by the biasing force of the spring member 29, the cylindrical piston member 15 and the air piston member 16 are also pushed up simultaneously, and the ball valve 31a is By moving downward, the first flow path 32 is closed, and the discharge of the content liquid is blocked. Further, since the liquid chamber 30 inside the cylindrical piston member 15 becomes negative due to the blockage of the ball valve 31a, the introduction passage is opened when the poppet valve 31b moves upward, and the container body 11 is accommodated. The liquid is sucked and supplied to the liquid chamber 30 through the suction pipe 27 and the small diameter liquid introduction chamber 28. Further, as the air piston member 16 rises, the large-diameter air chamber 24 becomes negative pressure and generates a suction force, and the check valve 35 provided in the air piston member 16 is opened by this suction force. At the same time, the outside air that has passed through the gap between the hollow pipe 22 and the guide stem 23 is taken into the large-diameter air chamber 24 via the outside air intake passage 34. Furthermore, as the pump head portion 19 is raised and the cylindrical piston member 15 and the air piston member 16 are raised accordingly, the closing portion 36 is closed as will be described later, and the air passing through the second flow path 33 is blocked. Distribution is substantially blocked.

  In this embodiment, the foam discharger 10 is disposed concentrically outside the hollow pipe 22 of the pump head portion 19, and the skirt-like cover 25 slides along the outer peripheral surface of the guide stem 23. It is provided (see FIG. 1). By covering the gap between the hollow pipe 22 and the guide stem 23 with the skirt-shaped cover 25, air is sucked through the narrow gap between the outer peripheral surface of the guide stem 23 and the inner peripheral surface of the skirt-shaped cover 25. Thus, from the gap between the hollow pipe 22 and the guide stem 23, water around the pump head portion 19 and the base cap portion 14 together with the outside air can be prevented to some extent from flowing into the large-diameter air chamber 24. .

  And in the foam discharger 10 of this embodiment, as shown to Fig.2 (a)-(c) and FIG. 3, in the junction part 39 of the cylindrical piston member 15 of the piston part 38 and the air piston member 16, A closed portion 36 for opening and closing the second flow path 33 is provided. In the closed portion 36, the liquid mixture in the mixing chamber 13 passes through the closed portion 36 to the large-diameter air chamber 24 that has become negative pressure. A fine flow path 37 is formed to allow a small amount of water to flow.

  That is, in this embodiment, the cylindrical piston member 15 moves up and down integrally with the hollow pipe 22 by fitting and connecting the upper end portion to the lower end portion of the hollow pipe 22 in the fitting portion 40. It has become. On the other hand, the air piston member 16 includes a cylindrical portion 16a that slidably contacts the outer peripheral surface of the cylindrical piston member 15 in a joint state at the joint portion 39, and an annular ring that protrudes outward from the central portion in the vertical direction of the cylindrical portion 16a. It is composed of a projecting portion 16b provided in a stepped manner, and an outer peripheral piston portion 16c provided at the outer peripheral tip portion of the projecting portion 16b and slidably slidably in contact with the inner peripheral surface of the large-diameter air chamber 24. The close contact force of the outer piston portion 16c to the inner peripheral surface of the large-diameter air chamber 24 is set to be larger than the close contact force of the portion 16a to the outer peripheral surface of the cylindrical piston member 15.

  In the present embodiment, the overhanging portion 41 for closing is provided on the outer peripheral surface of the cylindrical piston member 15 so as to project outward in an annular shape. By bringing the lower end face 42 of the cylindrical portion 16a of the air piston member 16 into contact with the closing overhanging portion 41, the joint portion 39 between the cylindrical piston member 15 and the air piston member 16, the hollow pipe 22 and the cylindrical piston. The fitting portion 40 with the member 15 is cut vertically, and the second flow path 33 by the notch groove 43 formed by extending vertically on the outer peripheral surface of the cylindrical piston member 15 can be closed. . That is, the closing portion 36 of the present embodiment is configured by the closing overhanging portion 41 and the lower end surface 42 of the cylindrical portion 16 a of the air piston member 16. The overhanging portion 41 for closing may be a flat flange shape protruding from the outer peripheral surface of the cylindrical piston member 15, but has a concave portion into which the lower end surface 42 of the cylindrical portion 16 a can be inserted. Preferably there is.

  Further, in the present embodiment, the cylindrical portion 16a of the air piston member 16 is formed by cutting out the inner surface of the lower end portion of the hollow pipe 22 into which the cylindrical piston member 15 is fitted, at a portion above the overhanging portion 16b. It arrange | positions so that insertion in the level | step difference recessed part 44 is possible.

  2A, the lower end surface 42 of the cylindrical portion 16a of the air piston member 16 is brought into close contact with the overhanging portion 41 for closing, and the notch groove 43 is used. The two flow paths 33 are closed, and between the upper end surface 45 of the cylindrical portion 16a and the step end surface 44a of the step recess 44, and the lower end surface 22a of the hollow pipe 22 and the base end portion of the overhanging portion 16b of the air piston member 16 A space is maintained between each of the upper surfaces 46.

  If the pump head part 19 is pushed down from the state before the pump head part 19 is pressed as shown in FIG. 2A when the foam discharger 10 is used, the cylindrical piston member of the cylindrical part 16a of the air piston member 16 Since the adhesion force to the inner peripheral surface of the large-diameter air chamber 24 of the outer peripheral piston portion 16c is set to be larger than the adhesion force to the outer peripheral surface of FIG. As shown, in the hollow pipe 22, the step end surface 44a of the step recess 44 is in contact with the upper end surface 45 of the cylindrical portion 16a, and the lower end surface 22a of the hollow pipe 22 is the upper surface of the base end portion of the overhanging portion 16b of the air piston member 16. Until it comes into contact with 46, it slides downward relative to the air piston member 16. Accordingly, the cylindrical piston member 15 fitted and connected to the hollow pipe 22 also slides downward relative to the air piston member 16, so that the lower end surface of the cylindrical portion 16a of the air piston member 16 When the close contact state of the 42 with the closing overhanging portion 41 is released and the closing portion 36 is opened, the air can flow through the second flow path 33.

  If the pump head part 19 is further pushed down, the cylindrical piston member 15 and the air piston member 16 are pushed down integrally through the hollow pipe 22, thereby forming a liquid chamber 30 formed inside the cylindrical piston member 15. Then, the content liquid is pressurized and discharged through the first flow path 32 toward the foaming flow path 21 in the hollow pipe 22, and the air in the large-diameter air chamber 24 is hollow through the second flow path 33. Pressurized and discharged toward the foaming flow path 21 in the pipe 22. Further, after the mixed liquid of the content liquid and air pressure-mixed in the mixing chamber 13 passes through the foam generating member 20 and foams, it is discharged in a foam form from the discharge port 26 of the pump head portion 19.

  On the other hand, when the pressing of the pump head portion 19 is released, first, as shown in FIG. 2C, the hollow pipe 22 and the cylindrical piston member 15 are made relative to the air piston member 16 by the biasing force of the spring member 29. In addition, the closing portion 36 is closed by bringing the closing protruding portion 41 into close contact with the lower end surface 42 of the cylindrical portion 16 a of the air piston member 16, and the closing passage 36 is closed. The air flow is substantially interrupted. In addition, after the closing overhang portion 41 and the lower end surface 42 of the cylindrical portion 16a are in close contact with each other and the closing portion 36 is closed, the cylindrical piston member 15 and the air piston member 16 are lifted together. As the cylindrical piston member 15 and the air piston member 16 rise, the liquid chamber 30 inside the cylindrical piston member 15 becomes negative pressure, and the internal solution is introduced into the liquid chamber 30 via the suction pipe 27 and the small-diameter liquid introduction chamber 28. Is sucked and supplied, and the large-diameter air chamber 24 has a negative pressure to generate a suction force, whereby the outside air that has passed through the gap between the hollow pipe 22 and the guide stem 23 via the outside air intake passage 34. However, the check valve 35 is opened and taken into the large-diameter air chamber 24. As a result, the pump head unit 19 returns to the state before being pressed as shown in FIG.

  Here, in this embodiment, as shown in FIG. 3, the inner solution and air mixed and formed in the mixing chamber 13 are formed on the lower end surface 42 of the cylindrical portion 16 a of the air piston member 16 constituting the closing portion 36. A fine flow path 37 for allowing a small amount of the mixed liquid to flow into the large-diameter air chamber 24 having a negative pressure from the second flow path 33 through the closed portion 36 is formed by a small notch 48 having an arc shape. Yes. The fine flow passage 37 is a fine flow passage having a size that allows the mixed liquid to pass through for the first time upon receiving a suction force due to a predetermined pressure difference, and is a large-diameter air chamber 24 generated by the rising of the air piston member 16. By the action of the negative pressure inside, the liquid mixture can be allowed to flow into the large-diameter air chamber 24 through the closed portion 36 in the closed state.

  And according to the foam dispenser 10 of the present embodiment having the above-described configuration, even if water enters the large-diameter air chamber 24, germs grow inside the large-diameter air chamber 24 where water has accumulated, It is possible to prevent the water from decaying over a long period of time and to exhibit excellent hygiene. In other words, according to the present embodiment, the large-diameter air chamber 24 has an outside air intake channel that opens when the pressure of the pump head portion 19 is released and the pump head portion 19 is restored, resulting in a negative pressure inside. 34 is provided with a check valve 35 that communicates with 34, and a closing portion 36 that closes the second flow path 33 is provided, and the large-diameter air chamber 24 is closed when a negative pressure occurs. A fine channel 37 through which the liquid in the mixing chamber 13 flows through the portion 38 is formed.

  As a result, when the pressure of the pump head portion 19 is released and the large-diameter air chamber 24 becomes negative pressure, the check valve 35 is opened and passes through the gap between the hollow pipe 22 and the guide stem 23. The outside air is sucked into the large-diameter air chamber 24 through the outside-air intake passage 34 and the mixed liquid in the mixing chamber 13 is taken into the large-diameter air chamber 24 through the fine channel 37 formed in the closed portion 36. Will be. In addition, since the content liquid constituting the mixed liquid generally contains a preservative, the pump head unit 19 and the base cap unit are accompanied by the suction of the outside air into the large-diameter air chamber 24 via the outside air intake passage 34. Even when water around 14 is taken into the large-diameter air chamber 24 and stored in the large-diameter air chamber 24, the preservative is mixed with the preservative in the liquid mixture flowing in from the fine flow path 37. Due to this action, it is possible to effectively prevent germs from growing inside the large-diameter air chamber 24 and water from decaying. Further, since the preservative contained in the content liquid is utilized, for example, the content liquid is repeatedly stored in the container body 11 by refilling or the like, and the foam dispenser 10 is used over a long period of time. However, it is possible to exhibit excellent hygiene over a long period of time without the effect of the preservative being weakened. Furthermore, when the large-diameter air chamber 24 has a negative pressure, it is sucked from the mixing chamber 13 via the fine flow path 37 and the mixed liquid is taken in, so that the vicinity of the discharge port 26 that communicates with the mixing chamber 13. Due to the back suction effect in which the liquid is also sucked, it is possible to prevent liquid sag of the mixed liquid (the content liquid in the form of bubbles) from the discharge port 26.

  FIG. 4 and FIG. 5 illustrate other forms of the closing portion 36 ′ that closes the second flow path 33 ′ so that it can be opened and closed. 4 and 5 includes a valve seat portion 50 provided to project outward from the outer peripheral surface of the cylindrical piston member 15 in an annular shape, and a valve body 51 provided on the air piston member 16. In response to the pressure from the large-diameter air chamber 24, the valve body 51 is separated from the valve seat portion 50, whereby air is supplied from the large-diameter air chamber 24 to the mixing chamber 13 via the second flow path 33 ′. It can be done. In addition, when the large-diameter air chamber 24 becomes negative pressure, the valve body 51 is brought into close contact with the valve seat portion 50 and closed to thereby substantially block the air flow through the second flow path 33 ′. It can be done. Further, as shown in FIG. 6, the valve seat portion 50 is formed with a fine flow path 37 ′ by a notch groove 52, and the large-diameter air chamber 24 is formed by releasing the pressure of the pump head portion 19. When a negative pressure is reached, the liquid mixture can be allowed to flow into the large-diameter air chamber 24 by passing through the closed portion 36 in the closed state. Also by the foam discharger 10 ′ having such a blocking part 36 ′, the preservative in the mixed liquid is mixed into the water taken into the large-diameter air chamber 24, and the same as the foam discharger 10 of the above embodiment. An effect is produced.

  In the present embodiment, it is preferable that water mixed with the liquid mixture taken into the large-diameter air chamber 24 can be discharged from the large-diameter air chamber 24. In order to allow the taken-in mixed liquid and water to be discharged from the large-diameter air chamber 24, for example, as shown in FIG. 7, the cylindrical portion 16 a of the air piston member 16 is arranged along the outer peripheral surface of the cylindrical piston member 15. And extending to the vicinity of the bottom of the large-diameter air chamber 24, and providing a flange-like closing overhang 41 ′ that protrudes outward from the outer peripheral surface of the cylindrical piston member 15 near the bottom of the large-diameter air chamber 24. A closing portion 36 that opens and closes the air inlet of the second flow path 33 that sends air to the mixing chamber 13 is provided near the bottom of the large-diameter air chamber 24. Accordingly, when the pump head portion 19 is pressed and the air in the large-diameter air chamber 24 is pumped to the mixing chamber 13 through the second flow path 33, the water mixed with the liquid mixture together with the air is mixed with the air by the pressure. The liquid mixture and water can be easily discharged by foaming together with the content liquid sent from the container body 11 via the first flow path 32 and discharging it from the pump head unit 19. Further, if the bottom of the large-diameter air chamber 24 is inclined downward toward the closing portion 36 that opens and closes the air inlet of the second flow path 33, the mixed liquid and water can be efficiently collected at the air inlet. It becomes possible to discharge the mixed liquid and water from the large-diameter air chamber 24 through the second flow path 33 more smoothly.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, as the closing part that closes the second flow path, which is an air flow path, so as to be openable and closable, various other structures including a fine flow path can be adopted in addition to the closing part having the above-described structure. Further, in the closed portion composed of the closed concave rib and the lower end surface of the cylindrical portion of the air piston member, it is not always necessary to cut out the lower end surface of the cylindrical portion to form a fine flow path. It is also possible to form a fine channel by forming a groove on the surface.

It is sectional drawing of the state which mounted | wore the mouth part of the container main body with the foam discharger which concerns on preferable one Embodiment of this invention. (A)-(c) is the A section enlarged sectional view of Drawing 1 explaining the situation where the 2nd channel is closed so that opening and closing is possible by a closure part. It is a fragmentary perspective view explaining the fine channel provided in the lower end surface of the cylindrical part of an air piston member. It is sectional drawing of the state which mounted | wore the mouth part of the container main body with the foam discharger which concerns on other preferable embodiment of this invention. It is the B section expanded sectional view of Drawing 4 which illustrates other forms of a closure part. It is a fragmentary perspective view explaining the fine flow path provided in the valve seat part of a cylindrical piston member. It is sectional drawing explaining the foam discharge device which provided the obstruction | occlusion part which opens and closes the air inflow port of the 2nd flow path which sends air to a mixing chamber near the bottom part of an air chamber so that a liquid mixture and water could be discharged | emitted from an air chamber. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Foam discharge device 11 Container main body 12 Mouth part 13 of container main body 14 Mixing chamber 14 Base cap part 14a Ceiling part 15 of base cap part Cylindrical piston member 16 Air piston member 16a Cylindrical part 16b of air piston member Overhang part of air piston member 16c Air piston member outer peripheral piston part 17 Cylinder part 19 Pump head part 20 Foam generation member 21 Foam flow path 22 Hollow pipe 23 Guide stem 24 Large diameter air chamber 26 Discharge port 28 Small diameter liquid introduction chamber 29 Spring member 30 Liquid chamber 32 First 1 flow path 33 2nd flow path 34 outside air intake flow path 35 check valve 36 closing part 37 fine flow path 38 piston part 39 junction 40 of cylindrical piston member and air piston member between hollow pipe and cylindrical piston member Fitting part 41, 41 'overhanging part for closing (closing part)
42 Lower end surface (blocking portion) of cylindrical portion of air piston member

Claims (5)

A first flow path that has a head portion that is provided so as to be reciprocally movable with respect to a cap portion that is attached to the mouth portion of the container main body, and sends the internal solution from the liquid chamber to the mixing chamber when the head portion is pressed; A foam discharger configured to open a second flow path for sending air from an air chamber to the mixing chamber and to make bubbles by mixing the content liquid and the air sent to the mixing chamber, A bubble generating member is provided in the flow path from the chamber to the discharge port,
The air chamber is provided with a check valve that communicates with an outside air intake passage that opens when the inside of the air chamber becomes negative pressure when the pressure of the head portion is released and the head portion is restored. A closing portion for closing the second flow path is provided;
A foam discharge device in which a fine flow path is formed in the air chamber through which the content liquid in the mixing chamber flows through the closing portion when negative pressure is reached.   It has a base cap portion that is installed on the mouth of the container body with a cylindrical guide stem standing from the ceiling portion, and has 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, a cylinder portion comprising a large-diameter air chamber and a small-diameter liquid introduction chamber disposed inside the neck portion and the base cap portion of the container body, and the small diameter A cylindrical piston member that slides along the inner peripheral surface of the liquid introduction chamber, and an air piston that protrudes radially outward from the cylindrical piston member and slides along the inner peripheral surface of the large-diameter air chamber 2. The foam discharger according to claim 1, further comprising a piston portion made of a member, wherein the second flow path and the closing portion are provided at a joint portion between the cylindrical piston member and the air piston member.   The foam dispenser according to claim 1 or 2, wherein the inner solution contains a preservative.   The foam discharger according to any one of claims 1 to 3, wherein an air inlet of a second flow path for sending air from the air chamber to the mixing chamber is provided in the vicinity of the bottom of the air chamber.   The foam discharger according to claim 4, wherein the bottom of the air chamber has a downward slope toward the air inlet.

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