JPH079778U - Foam dispenser - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the quality of discharged foam in a foam discharge container capable of discharging foam by pressing and deforming the container body, and to improve the resilience of the container body after foam discharge. In the foam discharge container 10, an air return port 16 that opens to the outer surface of the cap 12 so as to allow the outside air to flow in is provided separately from the foam discharge port 15.
Air return path 31 communicating the dip tube 25 with
Is provided in the cap 12 so as to be in parallel with the bubble generation and discharge path 32 from the gas-liquid mixing section 17 to the foam discharge port 15, and the air return path 31 is provided in the container from the dip tube 25 side to the air return port 16. Check valve 28 for blocking outflow of air
What is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 Since the present invention discharges like a detergent in the form of foam, the foamed liquid is discharged by pressing the container body and squeezing and deforming it while the container body is upside down, and the container body based on the subsequent release of the pressure. The present invention relates to a foam discharge container that allows external air to flow into the container due to the decompressing force inside the container when elastic recovery is performed.

[0002]

[Prior art]

 Conventionally, there are foam discharge containers as described in Japanese Patent Application Laid-Open Nos. 1-299630 and 4-48836. These foam discharge containers are a flexible container main body, a cap attached to the opening of the container main body, a gas-liquid mixture that is provided on the cap and mixes liquid inside the container and air inside the container to generate bubbles. Section, a liquid introduction path provided on the cap so as to guide the liquid in the container to the gas-liquid mixing section when inverted to the container body, and a cap so as to introduce the air inside the container to the gas-liquid mixing section when the container body is inverted. The air introduction passage, the dip tube that communicates with the air introduction passage of the cap and extends to the bottom side of the container body, and the outer surface of the cap to discharge the bubbles generated in the gas-liquid mixing section. It has a foam discharge port that can be opened. As a result, the container body is pushed up and deformed by squeezing the container body in an inverted state, and the liquid inside the container and the air inside the container are mixed in the gas-liquid mixing section to form bubbles, and these bubbles are discharged from the foam discharge port. It is what makes it eject. The gas-liquid mixing section is formed of a porous body such as a net or sponge. In Japanese Patent Laid-Open No. 1-299630, an air return port separate from the bubble discharge port is provided on the outer surface of the cap, and an air return path communicating with the air return port in the container is opened on the inner surface of the cap. As a result, the container body tries to recover elastically by releasing the pressure on the container body after the bubbles are discharged, and the decompression force inside the container allows external air to be taken into the container through the air return port and the air return path. .

In Japanese Utility Model Publication No. 4-48836, a check valve is provided to prevent external air from flowing into the container through a liquid introduction passage, and the bubble discharge port is also used as a bubble return port. It is said that. As a result, the container body tries to recover elastically by releasing the pressure on the container body after foam discharge, and the decompression inside the container allows external air to flow from the foam discharge port (air return port) to the gas-liquid mixing section and the air introduction path. , It is taken into the container through the dip tube.

[0004]

[Problems to be solved by the device]

 However, the conventional technology has the following problems. In JP-A-1-299630, the return air from the air return path flows into the liquid in the inverted container body when the container body is used upside down. They will come into contact and generate bubbles in the container. For this reason, when the bubbles are discharged from the container for the second time and thereafter, the bubbles generated inside the container enter the dip tube together with the air inside the container, and this foam impairs the passage of air inside the container inside the dip tube. This reduces the amount of air introduced in the container to the gas-liquid mixing section (reducing the ratio of air to liquid in the foam), which in turn deteriorates the foam quality due to the lowering of the foaming function in the gas-liquid mixing section. Bring

In Japanese Utility Model Publication No. 4-48836, the return air from the air return port is guided to the upper space of the inverted container body by the dip tube while the container body is being used upside down. It is possible to avoid such contact between the return air and the liquid in the container. However, in this device, since the return air from the air return port is introduced into the dip tube through the bubble discharge port that also serves as the air return port and the gas-liquid mixing section, these bubble discharge ports and Residual bubbles remaining in the gas-liquid mixing section are allowed to accompany the return air in the dip tube, and thus in the container body. Therefore, even in this case, when the bubbles are discharged from the container for the second time and thereafter, the bubbles entrained in the dip tube and the container body are retained in the dip tube and infiltrate into the container inside the dip tube. It impairs the passage of air and deteriorates the foam quality in the same manner as above. Also, with this product, when the outside air after foam discharge is taken into the container from the dip tube, the bubbles that have accumulated in the dip tube also impair the return air in the dip tube, and the container body Hinder the smooth restoration of.

An object of the present invention is to improve the quality of discharged foam in a foam discharge container that discharges foam by pressing and deforming the container body and to improve the resilience of the container body after foam discharge.

[0007]

[Means for Solving the Problems]

 The present invention according to claim 1 provides a flexible container body, a cap that is attached to the opening of the container body, and is provided on the cap to mix the liquid in the container and the air in the container to generate bubbles. The gas-liquid mixing section to be used, the liquid introduction path provided in the cap for guiding the liquid in the container to the gas-liquid mixing section when inverted to the container body, and the air inside the container to the gas-liquid mixing section when the container body is inverted. The air introduction passage provided in the cap, the dip tube communicating with the air introduction passage of the cap and extending to the bottom side of the container body, and the cap for discharging bubbles generated in the gas-liquid mixing portion In a foam discharge container that has a foam discharge port that can be opened to the outside, an air return port that opens to the outer surface of the cap is provided separately from the foam discharge port so that external air can flow in, and the dip from this air return port Communicate with tube An air return path is installed in the cap in parallel with the bubble generation and discharge path from the gas-liquid mixing section to the foam discharge port, and the air in the container from the dip tube side to the air return port is provided in this air return path. It is equipped with a check valve to prevent outflow.

The present invention according to claim 2 is the check valve according to the present invention according to claim 1, further comprising: a check valve for preventing external air from flowing from the gas-liquid mixing portion side to the dip tube side in the air introduction passage. Is provided.

According to a third aspect of the present invention, in addition to the first aspect of the present invention, a check valve for preventing external air from flowing into the gas-liquid mixing section is provided at the foam discharge outlet. This is what I did.

[0010]

[Action]

 According to the present invention as set forth in claim 1, the following effects are obtained. When the container body is pressed while the container body is inverted, the liquid inside the container is introduced into the gas-liquid mixing section from the liquid inlet, and the air inside the container is mixed from the dip tube through the air inlet to the gas-liquid mixture. Introduced to the department. Then, the liquid introduced into the gas-liquid mixing section and the air are foamed and discharged from the foam discharge port. After that, when the pressure is released while the container body is inverted, the pressure inside the container causes the external air to pass through the dip tube from the air return path that is in parallel with the foam generation and discharge path including the gas-liquid mixing section and the foam discharge port. It is taken into the upper space of the container and the container body is restored. It should be noted that the air inside the container introduced into the dip tube at the time of discharging bubbles is not entirely guided to the air return port by the check valve provided in the air return passage, but is entirely introduced from the air introduction passage to the gas-liquid mixing section.

[0011] Therefore, the external air taken into the container body after the bubbles are discharged (a) hardly passes through the bubble generation and discharge path, so that the residual bubbles in the bubble discharge port and the gas-liquid mixing section are moved to the dip tube side. (B) Since it is not entrained, it is taken into the upper space inside the container without contacting the liquid inside the container by passing through the dip tube, and therefore bubbles inside the container due to contact with the liquid inside the container Does not occur.

[0012] Due to these (a) and (b), even if the bubbles are discharged from the second time and thereafter, the bubbles do not remain in the dip tube, and the bubbles do not enter the dip tube. The introduction amount is kept proper, the gas-liquid ratio of the discharged foam is not changed, and the foam quality is not deteriorated. Moreover, even when the outside air after foam discharge is taken into the container from the dip tube, there is no accumulated foam inside the dip tube that would impair the return air flow inside the dip tube. Is smooth.

According to the present invention as set forth in claim 2, the following effects are obtained. A check valve was provided in the air introduction path between the dip tube and the gas-liquid mixing section to prevent external air from flowing from the gas-liquid mixing section side to the dip tube side. Therefore, when decompressing the inside of the container by releasing the pressure of the container body after discharging the foam, external air does not flow into the dip tube side from the gas-liquid mixing section through the air introduction passage, and the foam discharge port and gas-liquid mixing It is possible to reliably prevent the residual bubbles of the part from being entrained on the dip tube side.

When the check valve for preventing the inflow of external air is not provided in the liquid introduction passage, the depressurizing force in the container after discharging the bubbles causes the gas-liquid mixing section and the bubble discharge to pass through the liquid introduction passage. Although it extends to the outlet, the gas-liquid mixing section is made of a porous material such as a net or sponge and has high resistance. The resistance of the Qi return path is extremely low. Therefore, the invasion of external air from these bubble discharge ports and gas-liquid mixing section via the liquid introduction path is negligible, and the residual bubbles are entrained in the container or the liquid inside the container The occurrence of bubbles due to contact is not observed.

According to the present invention as set forth in claim 3, there is the following action. The bubble discharge port was provided with a check valve that blocks the introduction of external air into the gas-liquid mixing section. Therefore, when decompressing the inside of the container by releasing the pressure of the container body after foam discharge, external air does not flow into the gas-liquid mixing section from the foam discharge port, and the residual foam in the gas-liquid mixing section is externalized at the foam discharge port. It can be surely prevented from being entrained on the side of the dip tube together with air. It is also possible to completely prevent the possibility that external air may enter the container from the bubble generation and discharge path including the foam discharge port and the gas-liquid mixing section via the liquid introduction path and the air introduction path. The possibility that air may contact the liquid in the container to generate bubbles in the container can be reliably avoided.

[0016]

【Example】

 FIG. 1 is an overall sectional view showing a foam discharge container according to a first embodiment of the present invention, FIG. 2 is a sectional view of an essential part of FIG. 1, FIG. 3 is a sectional view taken along line III-III of FIG. 2, and FIG. FIG. 5 is a cross-sectional view showing a foam discharge state, FIG. 5 is a cross-sectional view showing a return air intake state after foam discharge, FIG. 6 is a cross-sectional view showing an essential part of a foam discharge container according to a second embodiment of the present invention, and FIG. FIG. 8 is a cross-sectional view showing a bubble discharge state, and FIG. 8 is a cross-sectional view showing a return air intake state after the bubble discharge.

(First Embodiment) (FIGS. 1 to 5) As shown in FIGS. 1 to 3, a foam discharge container 10 includes a flexible container body 11 made of soft plastic and an opening 11 A of the container body 11. And a cap 12 attached to the.

The cap 12 has an outer cap 13 screwed onto the outer peripheral portion of the opening 11 A of the container body 11, and an upper cap flange portion 14 A fitted inside the opening 11 A by the outer cap 13. The inner plug 14 is sandwiched between the outer end surfaces of the openings 11A. The outer cap 13 has a container closing part 13A and a hinged cover 13B, and the container closing part 13A is provided with a foam discharge port 15 and an air return port 16 separately from each other, and (a) a hinged cover 13B is provided. When the cover 13B is closed, the fitting pin 15A and the fitting pin 16A provided on the inner surface of the cover 13B are fitted into the foam discharge port 15 and the air return port 16, respectively, and the foam discharge port 15 and the air return port 16 are closed. (b) When the hinged cover 13B is opened, the fitting pin 15A and the fitting pin 16A are separated from the foam discharge port 15 and the air return port 16 to open the foam discharge port 15 and the air return port 16.

The cap 12 includes a gas-liquid mixing unit 17 that mixes the liquid in the container and the air in the container to generate bubbles. The gas-liquid mixing section 17 is formed in a ring-shaped space between the mixing chamber forming body 18 fitted around the inner cylindrical portion 14B of the inner plug 14 and the outer cylindrical portion 14C of the inner plug 14 and the mixing chamber forming body 18. And a mesh holder 19 to be fitted. The mixing chamber forming body 18 forms a mixing chamber 18C immediately above the inner cylindrical portion 14B of the inner plug 14, and the mesh holder 19 covers the mixing chamber 18C between the mesh holding body 19 and the upper end surface of the mixing chamber forming body 18. While sandwiching 1 mesh 21A, a second mesh 21B is attached to the upper end surface facing the foam discharge port 15, and a foam discharge passage 22 is formed so as to penetrate between the first mesh 21A and the second mesh 21B. is there.

The cap 12 has a liquid introduction path 23 that penetrates the liquid inside the container to the mixing chamber 18C of the gas-liquid mixing unit 17 when the container main body 11 is inverted, and penetrates the inner cylinder portion 14B of the inner plug 14.

The cap 12 has a groove-shaped air introduction passage 24 that guides the air inside the container to the mixing chamber 18C of the gas-liquid mixing section 17 when the container body 11 is inverted, and is located at the third circumferential position on the inner peripheral surface of the mixing chamber forming body 18. It is formed in the table.

The cap 12 holds a dip tube 25 at the inner end of the inner plug 14. One end of the dip tube 25 communicates with the above-mentioned air introduction passage 24 provided in the cap 12, and the other end thereof extends to the bottom 11B side of the container body 11.

The cap 12 holds a thin plate valve body 26 between a step portion 14D provided on the intermediate outer peripheral portion of the inner cylindrical portion 14B of the inner plug 14 and a lower end surface of the mesh holding body 19. The valve body 26 is provided with a tongue-shaped check valve 27 around its inner peripheral portion and a tongue-shaped check valve 28 on its outer peripheral side. The check valve 27 is provided on the step side 14D of the inner plug 14 on the inlet side of the air introduction path 24 described above (a) under the pressure action of the external air from the gas-liquid mixing section 17 side toward the dip tube 25 side. The seat is seated and the air introduction passage 24 is sealed against the dip tube side to prevent the introduction of external air from the gas-liquid mixing section 17 side to the dip tube 25 side, and (b) the dip tube 25 from the side of 25 toward the side of the gas-liquid mixing section 17 under the pressure of the air in the container to separate from the stepped portion 14D of the inner plug 14 and communicate the air inlet passage 24 with the side of the dip tube 25. The introduction of the air in the container from the side of 25 to the side of the gas-liquid mixing section 17 is permitted. The operation of the check valve 28 will be described later.

Further, in the foam discharge container 10, the air return passage 31 that connects the air return port 16 provided in the container closing portion 13 A of the outer cap 13 to the dip tube 25 is connected to the foam discharge port from the gas-liquid mixing unit 17. It is provided in the inner plug 14 of the cap 12 and the mesh holder 19 so as to be in parallel with the bubble generation and discharge path 32 reaching 15.

At this time, the intermediate portion of the air return path 31 is formed so as to penetrate at each of the three positions in the circumferential direction of the lower end surface of the mesh holder 19, and the check valve 28 described above is provided at the penetrating part 31 A at these three positions. Are arranged correspondingly. The check valve 28 (a) is seated on the lower end surface of the mesh holder 19 under the pressure of the air in the container from the side of the dip tube 25 to the air return port 16 to seal the penetration part 31A, and the dip From the lower end surface of the mesh holding body 19 under the pressure action of the external air directed to the dip tube 25 side from the air return port 16 to prevent the outflow of the air in the container from the tube 25 side to the air return port 16. The penetrating portion 31A is opened apart, and the introduction of external air from the air return port 16 to the dip tube 25 side is allowed.

Hereinafter, a usage state of the foam discharge container 10 will be described (FIGS. 4 and 5). (1) Under the inverted state of the container body 11 in which the hinged cover 13B of the outer cap 13 is opened, the container body 11 is pressed to cause the container body 11 to be squeezed and deformed (squeeze), and the liquid in the container is mixed from the liquid introduction path 23 to the mixing chamber 18C. Then, the air in the container is introduced into the mixing chamber 18C from the dip tube 25 through the check valve 27 and the air introducing passage 24, and the gas and liquid are mixed in the mixing chamber 18C to generate bubbles. Is sequentially passed through the first mesh 21A and the second mesh 21B to be homogenized and then discharged from the foam discharge port 15 (FIG. 4). It should be noted that the air inside the container introduced into the dip tube 25 at the time of discharging bubbles is not guided to the air return port 16 by the check valve 28 provided in the air return passage 31, and is completely mixed from the air introduction passage 24. Guided to section 17.

(2) After the bubbles are discharged as described in (1) above, if the pressure on the container body 11 is released while the container body 11 is upside down, the air inside the container is decompressed due to the elastic restoring behavior of the container body 11, and the external air is released. , The bubble generation / discharge path 32 including the gas-liquid mixing section 17 and the foam discharge port 15, the air return port 16 in parallel, the air return path 31, and the check valve 28 from the check valve 28 into the upper space of the container via the dip tube 25. Then, the container body 11 is restored (FIG. 5).

The operation of this embodiment will be described below. The external air taken into the container body 11 after the foam is discharged hardly passes through (a) the bubble generation and discharge path 32, so that the residual foam of the foam discharge port 15 and the gas-liquid mixing section 17 is entrained on the dip tube 25 side. (B) It does not come into contact with the liquid inside the container by passing through the dip tube 25 and is taken into the upper space inside the container, so that bubbles inside the container are generated due to contact with the liquid inside the container. Does not occur.

Due to these (a) and (b), even if the foam discharge from the second time onward is repeated, the bubbles do not remain in the dip tube 25, and the bubbles do not enter the dip tube 25. It keeps the amount of air introduced properly, does not change the gas-liquid ratio of discharged foam, and does not cause deterioration of foam quality. Further, even when the outside air after foam discharge is taken into the container from the dip tube 25, there is no stagnant foam inside the dip tube 25 that would impair the passage of return air in the dip tube 25. Restoration is smooth.

A check valve 27 for blocking the inflow of external air from the gas-liquid mixing section 17 side to the dip tube 25 side is provided in the air introduction path 24 between the dip tube 25 and the gas-liquid mixing section 17. It was Therefore, when decompressing the inside of the container due to the release of the pressure of the container body 11 after the foam discharge, the outside air does not flow from the gas-liquid mixing section 17 to the dip tube 25 side through the air introduction passage 24, and the foam discharge is performed. It is possible to reliably prevent the bubbles remaining in the outlet 15 and the gas-liquid mixing section 17 from being entrained on the dip tube 25 side.

When the check valve for preventing the inflow of the external air is not provided in the liquid introduction passage 23, the depressurizing force in the container after the bubbles are discharged is increased by the gas-liquid mixing section 17 via the liquid introduction passage 23. The gas-liquid mixing section 17 is made of a porous material such as a net or sponge and has a large resistance, although it extends to the bubble-discharging section 15. The resistance of the air return path 31, which is in parallel with the path 32, is extremely low. Therefore, the invasion of the outside air from the bubble discharge port 15 and the gas-liquid mixing section 17 via the liquid introduction path 23 is negligibly small, and the residual bubbles are accompanied in the container, It cannot be observed that bubbles are generated due to contact with the liquid in the container.

(Second Embodiment) (FIGS. 6 to 8) A bubble discharge container 40 of the second embodiment is substantially different from the foam discharge container 10 of the first embodiment in that as shown in FIG. The check valve 27 provided on the inlet side of the introduction path 24 is removed, and the tongue-like check valve 41 is fitted to the outer cap 13 of the cap 12 immediately below the foam outlet 15 and to the outlet side of the foam outlet 22. I have placed it. The check valve 41 is (a) seated on the upper end surface of the mesh holder 19 under the pressure of the external air flowing from the foam discharge port 15 toward the gas-liquid mixing section 17 to allow the foam discharge port 15 to move to the gas-liquid mixing section. 17 is sealed to prevent the inflow of external air into the gas-liquid mixing section 17, and (b) the gas-liquid mixing section 17 heads toward the foam discharge port 15 of the mesh holder 19 under the pressure of bubbles. The gas-liquid mixing unit 17 is communicated with the foam discharge port 15 apart from the upper end surface to allow the bubbles to flow from the gas-liquid mixing unit 17 to the foam discharge port 15 side.

In the foam discharge container 40, only the first mesh 21A is held on the mesh holder 19 and the second mesh 21B is not adopted. However, the foam discharge container 40 may be provided with the one like the second mesh 21B.

Further, in the foam discharge container 40, the check valve 28 provided in the air return path 31 is removed, and a ball-shaped check valve 42 which replaces the check valve 28 is provided in the container closing portion 13 A of the outer cap 13. It is built in the air return path 43 directly connected to the air return port 16. The check valve 42 (a) is seated on a valve seat 44 provided directly below the air return port 16 under the pressure of the air inside the container from the dip tube 25 side toward the air return port 16 and is attached to the air return path 43. To prevent the flow of air in the container from the side of the dip tube 25 to the air return port 16 and (b) under the pressure of external air flowing from the air return port 16 to the side of the dip tube 25, The air return passage 43 is opened apart from the valve seat 44 provided immediately below the return opening 16, and the air return opening 16 is provided to the dip tube 25 side via the slit-like passage 43A forming the air return passage 43. Allow the inflow of external air into the.

The usage state of the foam discharge container 40 will be described below (FIGS. 7 and 8). (1) Under the inverted state of the container body 11 in which the hinged cover 13B of the outer cap 13 is opened, the container body 11 is pressed to cause the container body 11 to be squeezed and deformed (squeeze), and the liquid in the container is mixed from the liquid introduction path 23 to the mixing chamber 18C. Then, the air in the container is introduced into the mixing chamber 18C from the dip tube 25 through the air introduction passage 24, and the gas and liquid are mixed in the mixing chamber 18C to generate bubbles, and the bubbles are further generated in the first mesh 21A. The mixture is homogenized by passing through it and then discharged from the foam discharge port 15 (FIG. 7). It should be noted that the air inside the container introduced into the dip tube 25 at the time of discharging bubbles is not guided to the air return port 16 by the check valve 42 provided in the air return passage 43, and is completely mixed from the air introduction passage 24. Guided to section 17.

(2) After the bubbles are discharged as described in (1) above, if the pressure on the container body 11 is released while the container body 11 is upside down, the external air is released due to the decompression inside the container due to the elastic restoring behavior of the container body 11. , The bubble generation / discharge path 32 including the gas-liquid mixing section 17 and the foam discharge port 15, the air return port 16 in parallel, the air return path 43, and the check valve 42 from the check valve 42 into the upper space of the container via the dip tube 25. Then, the container body 11 is restored (FIG. 8).

The operation of this embodiment will be described below. The external air taken into the container body 11 after the foam is discharged hardly passes through (a) the bubble generation and discharge path 32, so that the residual foam of the foam discharge port 15 and the gas-liquid mixing section 17 is entrained on the dip tube 25 side. (B) It does not come into contact with the liquid inside the container by passing through the dip tube 25 and is taken into the upper space inside the container, so that bubbles inside the container are generated due to contact with the liquid inside the container. Does not occur.

Due to these (a) and (b), even if the bubble discharge from the second time onward is repeated, the bubbles do not remain in the dip tube 25 or enter the dip tube 25. It keeps the amount of air introduced properly, does not change the gas-liquid ratio of discharged foam, and does not cause deterioration of foam quality. Further, even when the outside air after foam discharge is taken into the container from the dip tube 25, there is no stagnant foam inside the dip tube 25 that would impair the passage of return air in the dip tube 25. The restoration of 11 is smooth.

The bubble discharge port 15 is provided with a check valve 42 that prevents introduction of external air into the gas-liquid mixing section 17. Therefore, external air does not flow into the gas-liquid mixing unit 17 from the foam discharge port 15 when the pressure in the container is reduced due to the release of the pressure of the container body 11 after the foam discharge, and the foam discharge port 15 is used as the gas-liquid mixing unit 17. It is possible to surely prevent the residual bubbles from being entrained on the dip tube 25 side together with the external air. Further, it is possible to completely prevent the possibility that external air may enter the container from the bubble generation / discharge path 32 including the foam discharge port 15 and the gas-liquid mixing section 17 via the liquid introduction path 23 and the air introduction path 24. It is possible to surely avoid the possibility that the invading outside air will come into contact with the liquid in the container to generate bubbles in the container.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, the gas-liquid mixing section is not limited to the mesh, but may be provided with a porous body such as a sponge, or with another bubble generating mechanism.

[0041]

[Effect of device]

 As described above, according to the present invention, it is possible to improve the quality of foam to be discharged and the resilience of the container body after foam discharge in a foam discharge container that discharges bubbles by pressing and deforming the container body. .

[Brief description of drawings]

FIG. 1 is an overall sectional view showing a foam discharge container according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a main part of FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a cross-sectional view showing a foam discharge state.

FIG. 5 is a cross-sectional view showing a return air intake state after foam discharge.

FIG. 6 is a cross-sectional view showing a main part of a foam discharge container according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a foam discharge state.

FIG. 8 is a cross-sectional view showing a state in which return air is taken in after discharging bubbles.

[Explanation of symbols]

 10, 40 Bubble discharge container 11 Container body 11A Opening 12 Cap 15 Bubble discharge port 16 Air return port 17 Gas-liquid mixing section 23 Liquid introduction path 24 Air introduction path 25 Dip tube 27, 28, 41, 42 Check valve 31, 43 Air return path 32 Bubble generation and discharge path

Claims (3)

[Scope of utility model registration request] 1. A flexible container main body, a cap that is attached to the opening of the container main body, and a gas-liquid mixing unit that is provided on the cap and that mixes liquid inside the container and air inside the container to generate bubbles. , Liquid introduction path provided in the cap so as to guide the liquid in the container to the gas-liquid mixing section when inverted to the container body, and air introduction provided in the cap so as to introduce the air in the container to the gas-liquid mixing section when the container body is inverted Channel, a dip tube that communicates with the air introduction channel of the cap and extends to the bottom side of the container body, and a foam spout that is opened in the cap so as to discharge the foam generated in the gas-liquid mixing section. In a foam discharge container having an outlet, an air return port that opens to the cap to allow external air to flow in is provided separately from the foam discharge port, and an air return path that communicates with the dip tube from this air return port, A check valve is provided on the cap so as to be in parallel with the bubble generation and discharge path from the liquid mixing section to the foam discharge port, and a check valve for blocking the outflow of air in the container from the dip tube side to the air return port is provided in this air return path. A foam discharge container characterized by being provided. 2. The foam discharge container according to claim 1, wherein the air introduction passage is provided with a check valve for preventing the inflow of external air from the gas-liquid mixing portion side to the dip tube side. 3. The foam discharge container according to claim 1, wherein the foam discharge port is provided with a check valve for preventing external air from flowing into the gas-liquid mixing section.