JP2020079110A - Foam discharger - Google Patents

Abstract

To provide a foam discharger structured to be able to discharge fine foam more surely.SOLUTION: A foam discharger comprises a foam generation part that generates foam from liquid, a foam flow path 700 on which foam generated by the foam generation part passes, and a discharge port through which the foam passing on the foam flow path 700 is discharged. The foam flow path 700 includes an upstream side flow path 720 and a narrow flow path 730 arranged adjacent to the downstream side of the upstream side flow path 720 and having areas of a flow path smaller than the upstream side flow path 720, and a downstream side flow path 740 arranged adjacent to the downstream side of the narrow flow path 730 and having areas of a flow path larger than the narrow flow path 730. The foam generation part has a plurality of foam discharge ports 710 each opening toward the upstream side flow path 720, where a length dimension L2 of the narrow flow path 730 is larger than a length dimension L1 of the upstream side flow path 720.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a foam dispenser and a liquid-filled foam dispenser.

Examples of the foam ejector that generates foam from a liquid and ejects the foam include a squeeze former described in Patent Document 1.
The squeeze former of Patent Document 1 includes a mixing unit that mixes liquid and air to generate bubbles, and a discharge hole that discharges bubbles from the mixing unit, and a screw thread is formed on the inner surface of the discharge port. -Shaped or bellows-shaped irregularities are formed.

JP 2006-290365 A

  According to the study by the present inventors, the technique of Patent Document 1 cannot necessarily discharge sufficiently fine bubbles.

  The present invention relates to a foam ejector having a structure capable of ejecting fine bubbles more reliably and a liquid-filled foam ejector.

  The present invention includes a foam generation unit that generates foam from a liquid, a foam flow path through which the foam generated by the foam generation unit passes, and a discharge port that discharges the foam that has passed through the foam flow path. The bubble channel is a downstream channel of the upstream channel, a narrow channel disposed adjacent to the downstream side of the upstream channel and having a channel area smaller than that of the upstream channel, A plurality of bubbles that are arranged adjacent to each other and have a flow passage area larger than that of the narrow flow passage, and that the bubble generation unit is open toward the upstream flow passage. The present invention relates to a foam dispenser having an outlet, in which the length dimension of the narrow channel is larger than the length dimension of the upstream channel.

  According to the present invention, it is possible to more reliably discharge fine bubbles.

It is a front sectional view of a foam dispenser according to an embodiment. It is the elements on larger scale of FIG. It is a figure which shows the planar positional relationship of each part of a bubble flow path, and the bubble outlet from a bubble generation part. 4(a), 4(b), 4(c), and 4(d) are diagrams showing images of bubbles discharged by the bubble discharger according to the embodiment. 5(a) and 5(b) are each a diagram showing a modification of the vertical cross-sectional shape of the narrow channel. 6(a), 6(b), 6(c), and 6(d) are diagrams showing images of bubbles discharged by the bubble discharger according to the comparative example.

Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS. 1 to 3. In all the drawings, the same reference numerals are given to the same components, and the duplicate description will be appropriately omitted.
The downward direction in FIGS. 1 to 3 is the downward direction, and the upward direction is the upward direction. That is, in the case of the present embodiment, the downward direction (downward) is the direction of gravity when the bottom portion 14 of the foam dispenser 100 is placed on a horizontal mounting surface and the foam dispenser 100 is self-supporting.
In FIG. 1, in the structure of a foam discharge cap 200 (described later) included in the foam discharger 100, only the outline is shown for the portion below the curve H.
In FIG. 3, the planar shape of each part of the bubble flow path 700 and the bubble outlet 710 from the bubble generation part 20 is shown. More specifically, in FIG. 3, the outlines of the upstream end 731 and the downstream end 732 of the narrow channel 730 (in the present embodiment, these two outlines match each other), the outline of the upstream channel 720. Lines, a plurality of bubble outlets 710, and a communication channel 32d forming part of the downstream channel 740 are shown.

As shown in any of FIG. 1 to FIG. 3, the foam ejector 100 according to the present embodiment includes a foam generation unit 20 (FIG. 1) that generates foam from a liquid 101, and a foam generated by the foam generation unit 20. And a discharge port 41 for discharging the foam that has passed through the foam flow path 700.
As shown in FIG. 2, the bubble channel 700 is a narrow channel that is arranged adjacent to the upstream channel 720 and on the downstream side of the upstream channel 720 and has a smaller channel area than the upstream channel 720. 730 and a downstream-side channel 740 that is arranged adjacent to the downstream side of the narrow channel 730 and has a larger channel area than the narrow channel 730.
The bubble generation unit 20 has a plurality of bubble outlets 710 (FIGS. 2 and 3) that are open toward the upstream flow path 720. The number of bubble outlets 710 is not particularly limited as long as it is plural, but in the case of the present embodiment, the number of bubble outlets 710 is eight as shown in FIG.
The number of fine channels 730 included in the bubble channel 700 may be one or more, but is preferably one.
The length dimension L2 (FIG. 2) of the narrow channel 730 is larger than the length dimension L1 (FIG. 2) of the upstream side channel 720.

According to the present embodiment, when the bubbles generated by the bubble generation unit 20 pass through the narrow channel 730, a shearing force due to the viscous resistance between the inner peripheral surface of the narrow channel 730 and the bubbles is applied to the bubbles. , The bubbles become finer. More specifically, when the bubbles pass through the narrow channels 730, it is considered that the bubbles are miniaturized by repeatedly performing the operation of stretching the bubbles in the longitudinal direction of the narrow channels 730 and dividing the bubbles.
Moreover, since the length dimension L2 of the narrow channel 730 is larger than the length dimension L1 of the upstream channel 720, the bubbles can be more sufficiently miniaturized by shearing.
Therefore, it becomes possible to more reliably make the bubbles finer and eject the bubbles from the ejection port 41.
In addition, since the foam channel 700 has a downstream channel 740 that is arranged adjacent to the downstream side of the narrow channel 730 and has a larger channel area than the narrow channel 730, the bubbles that have passed through the narrow channel 730 The flow velocity can be sufficiently relaxed in the downstream flow passage 740 before being discharged from the discharge port 41. Therefore, the bubbles discharged from the discharge port 41 can be easily received by the discharge target object such as a hand, and the bubble breakage due to the collision of the bubble with the discharge target object can be suppressed.
Further, according to the study by the present inventors, it is possible to make bubbles smaller and discharge them regardless of the flow velocity of the bubbles passing through the bubble flow path 700 (described later).

The cross-sectional shape of the narrow channel 730 orthogonal to the longitudinal direction of the bubble channel 700 is not particularly limited. In the case of this embodiment, this orthogonal cross-sectional shape is circular.
However, the present invention is not limited to this example, and the orthogonal cross-sectional shape may be another shape such as a polygonal shape or a polygonal shape with rounded corners.
Further, in the case of the present embodiment, the shapes of the upstream end 731 and the downstream end 732 of the narrow channel 730 are also circular.
In the present embodiment, the upstream end 731 and the downstream end 732 have the same shape, and the upstream end 731 and the downstream end 732 coincide with each other in a plan view. However, the present invention is not limited to this example, and the upstream end 731 and the downstream end 732 may have different shapes, and the upstream end 731 and the downstream end 732 are arranged at positions displaced from each other in plan view. It may have been done.
More specifically, in the case of this embodiment, the internal space of the small-diameter flow path 730 has a cylindrical shape.
The inner diameter D (FIG. 2) or the equivalent circle diameter of the narrow channel 730 is not particularly limited, but is preferably 0.5 mm or more and 6.0 mm or less, more preferably 1.0 mm or more and 4.0 mm or less, More preferably, it is 2.0 mm or more. By setting the inner diameter D or the circle-equivalent diameter of the narrow channel 730 to be 0.5 mm or more and 6.0 mm or less, bubbles can be made more reliable and finer.

When viewed in the axial direction (the direction of the axial center AX11 shown in FIG. 2) at the upstream end 731 of the narrow channel 730, the narrow channel 730 is arranged at the center of the upstream channel 720.
For this reason, the flow velocity of the bubbles is moderately reduced at the stage where the bubbles flow from the upstream channel 720 to the narrow channels 730, so that the bubbles are prevented from passing through the narrow channels 730, and the bubbles in the narrow channels 730 are sheared. Will be performed more reliably.
In the case of the present embodiment, the axial center direction at the upstream end 731 of the narrow channel 730 is the vertical direction. Therefore, as shown in FIG. 3, the arrangement of the upstream flow passage 720 and the fine flow passage 730 when the fine flow passage 730 and the upstream flow passage 720 are viewed in plan is viewed in the axial direction at the upstream end 731 of the fine flow passage 730. It is an arrangement of the narrow flow path 730 and the upstream flow path 720 at the time.
The central portion of the upstream flow passage 720 is a region that avoids the peripheral portion of the upstream flow passage 720. The peripheral portion of the upstream flow passage 720 is, for example, as shown in FIG. 3, a radius (or a circle equivalent radius) of the upstream flow passage 720 when viewed in the axial direction at the upstream end 731 of the narrow flow passage 730. When r is set, the area can be set to r/10 from the outer circumference of the upstream flow path 720. That is, when viewed in the axial direction at the upstream end 731 of the narrow channel 730, the bubble channel 700 has the narrow channel 730 in a circular region having a radius of 9r/10 with the center C of the upstream channel 720 as a reference. It is preferable to have. It should be noted that the present invention does not exclude that the foam flow path 700 has the fine flow path 730 arranged in the region of r/10 from the outer circumference of the upstream flow path 720. In addition to the narrow channel 730 arranged in the central portion of the passage 720, the narrow passage 730 may be arranged in the peripheral portion of the upstream side passage 720.
When the number of the fine channels 730 is one, the center C of the upstream side channel 720 is located inside the outline of the fine channel 730 when viewed in the axial direction at the upstream end 731 of the fine channel 730. Is preferred. Even when the number of the fine channels 730 is plural, when viewed in the axial direction at the upstream end 731 of the fine channels 730, the center C of the upstream channel 720 is one of the plurality of fine channels 730. It is preferable to be located inside the outline of the.

As shown in FIG. 3, when viewed in the axial direction at the upstream end 731 of the narrow channel 730, it is preferable that the narrow channel 730 is arranged at a position closer to the center than the arrangement region of the plurality of bubble outlets 710. .. That is, when viewed in the axial direction at the upstream end 731 of the narrow channel 730, the center of each bubble outlet 710 is preferably arranged outside the outline of the narrow channel 730.
As a result, there is a portion (for example, the lower end surface 831 of the upper member 830 described later) that obstructs the flow of bubbles at the boundary between the upstream flow path 720 and the narrow flow path 730, and the upstream flow path 720 and the narrow flow path. The bubble can be sufficiently slowed down at the boundary with the path 730.

The length dimension L2 (FIG. 2) of the narrow channel 730 is preferably 3 mm or more. With such a configuration, the bubbles in the narrow channel 730 can be more sufficiently sheared, so that the bubbles can be more reliably and finely divided.
More preferably, the length dimension L2 is 5 mm or more. The length dimension L2 is preferably 40 mm or less, and more preferably 20 mm or less.

The length dimension L1 (FIG. 2) of the upstream channel 720 is preferably 1 mm or more. With such a configuration, each bubble is formed as an independent bubble in the upstream flow path 720 (defined by each bubble), and after the total film thickness of each bubble is averaged. , Bubbles can flow into the channel 730 and undergo shear. In other words, immediately after the generation of bubbles, the dynamic surface tension is large and the film thickness is biased (orientated), whereas the bubbles are generated in the process of passing through the upstream side flow path 720 of sufficient length. The bubbles may be allowed to flow into the narrow channels 730 after the film thickness is averaged. Therefore, it is possible to more surely make the bubbles finer.
More preferably, the length dimension L1 is 2 mm or more. The length dimension L1 is preferably 10 mm or less.

It is preferable that the flow path area changes discontinuously at the boundary between the downstream end 722 of the upstream flow path 720 and the upstream end 731 of the narrow flow path 730. With such a configuration, the flow velocity of the bubbles can be more surely reduced at the stage where the bubbles flow from the upstream side flow passage 720 to the narrow flow passage 730, so that the shearing of the bubbles in the fine flow passage 730 is further ensured. Can be done. Further, it is possible to secure a space for the bubbles to be sufficiently defined in the upstream channel 720.
More specifically, the flow path area of the upstream end 731 of the narrow flow path 730 is preferably 1% or more and 40% or less of the flow path area of the downstream end 722 of the upstream flow path 720, and 15% or more and 35% or less. Is more preferable.

The flow passage area in the upstream flow passage 720 is larger than the total opening area of the plurality of bubble outlets 710.
The flow passage area at the upstream end 731 of the narrow flow passage 730 is preferably equal to or larger than the total opening area of the plurality of bubble outlets 710. This allows the bubbles discharged from the bubble outlet 710 to smoothly flow into the narrow channel 730 (without receiving excessive pressure). Therefore, it is possible to prevent the bubbles from breaking when the bubbles flow from the upstream channel 720 to the narrow channel 730.

As shown in FIG. 1, the foam ejector 100 includes a storage container 10 that stores the liquid 101, and a foam ejection cap 200 that is detachably attached to the storage container 10.
Although the shape of the storage container 10 is not particularly limited, for example, the storage container 10 closes the body portion 11, the cylindrical mouth/neck portion 13 connected to the upper side of the body portion 11, and the lower end of the body portion 11. And a bottom portion 14 that is open. An opening is formed at the upper end of the mouth/neck portion 13.
The liquid-filled foam dispenser 500 according to the present embodiment includes the foam dispenser 100 and the liquid 101 filled in the storage container 10.

In the present embodiment, as the liquid 101, a hand soap can be mentioned as a representative example, but the liquid 101 is not limited to this. A face wash, a cleansing agent, a dishwashing detergent, a hair styling agent, a body soap, a shaving cream, a foundation and Examples include various cosmetics such as cosmetics for skin, hair dyes, disinfectants, and the like used in the form of foam.
The viscosity of the liquid 101 before forming bubbles is not particularly limited, but can be, for example, 1 mPa·s or more and 20 mPa·s or less at 20°C. A B-type viscometer is used for viscosity measurement, and a rotor and a rotation speed suitable for the viscosity range to be measured can be selected.

In the case of the present embodiment, the foam ejector 100 changes the liquid 101 into a foam shape by bringing the liquid 101 stored in the storage container 10 at normal pressure into contact with the gas in the foam generation unit 20. The foam discharger 100 is, for example, a pump container that discharges foam by manual operation.
However, the present invention is not limited to this example, and the foam dispenser may be a so-called squeeze bottle configured to discharge foam when the storage container is squeezed, or an electric motor equipped with a motor or the like. A foam dispenser. Further, the foam ejector may be an aerosol container in which a liquid is filled in a storage container together with a compressed gas.

  The foam discharge cap 200 is for detachably attaching the cap member 110 to the storage container 10, the pump unit 600 provided to the cap member 110, and the pump unit 600 for sucking up the liquid 101 in the storage container 10. The dip tube 128, the head member 30 held by the pump unit 600, and the bubble generation unit 20 provided in the head member 30 are provided.

The cap member 110 includes a mounting portion 111 that is detachably mounted to the mouth/neck portion 13 of the storage container 10 by a fastening method such as screwing, an annular closing portion 112 that closes the upper end of the mounting portion 111, The annular closing portion 112 is provided with an upright tubular portion 113 that is upright from the central portion.
The head member 30 includes an operation receiving portion 31 that receives a pressing operation by the user, an inner tubular portion 32 that extends downward from the operation receiving portion 31, and an outer tubular portion 33 that is arranged around the inner tubular portion 32. , A nozzle section 40. The lower portion of the inner tubular portion 32 is inserted into the standing tubular portion 113. The inner space of the inner cylinder portion 32 and the nozzle inner bubble flow passage 90, which is the inner space of the nozzle portion 40, communicate with each other via a communication passage 32 d formed at the upper end of the inner cylinder portion 32. A discharge port 41 is formed at the downstream end of the in-nozzle foam channel 90. The communication flow path 32d and the in-nozzle foam flow path 90 form a downstream flow path 740 of the foam flow path 700.
The internal space of the inner tubular portion 32 and the space below the communication channel 32d is the holding portion 32c. An upper member 830 and a lower member 820, which will be described later, are housed in the holding portion 32c. The lower member 820 and the upper member 830 form a foam outlet 710 of the foam generating unit 20, an upstream flow path 720 of the foam flow path 700, and a narrow flow path 730.
The pump unit 600 includes a liquid supply pump that supplies the liquid 101 in the storage container 10 to the bubble generation unit 20 when the head member 30 is pressed down by a pressing operation on the operation receiving unit 31, and a storage when the head member 30 is pressed down. It is configured to include a gas supply pump that supplies the gas in the container 10 to the bubble generation unit 20. The structure of the pump unit 600 is well known, and a detailed description thereof will be omitted here.
The bubble generation part 20 has a gas-liquid contact part (not shown) in which the liquid 101 supplied from the liquid supply pump and the gas supplied from the gas supply pump contact each other. The liquid 101 and the gas are mixed at the gas-liquid contact portion to generate bubbles. In the case of the present embodiment, as described above, the bubble generation unit 20 has the plurality of bubble outlets 710 that are open toward the upstream channel 720. As an example, the bubble generation part 20 has a plurality of gas-liquid contact parts corresponding to each bubble outlet 710.
As described above, the foam ejector 100 includes the storage container 10 that stores the liquid 101 and the mounting portion 111 that is mounted on the storage container 10. The foam generating unit 20, the foam flow path 700, and the ejection port 41 are It is held by the mounting portion 111.
By attaching the foam discharge cap 200 to the storage container 10, the opening at the upper end of the mouth/neck portion 13 is closed by the foam discharge cap 200.
The structure of the foam discharge cap 200 (including the pump portion 600) described here is an example, and other widely known structures of the foam discharge cap 200 are within the scope of the present invention. A structure may be applied.

The foam ejector 100 is operated by the user performing a single pressing operation on the operation receiving portion 31 of the head member 30 (operation of pressing the head member 30 from the top dead center to the bottom dead center), that is, foam discharging operation. A certain amount of bubbles are discharged from the. Strictly speaking, when the discharging operation is performed after a long time interval, the amount of bubbles to be discharged is smaller than that in the case where the discharging operation is continuously performed.
Since the bubble channel 700 in the narrow channel 730 is thin, the amount of bubbles remaining in the portion from the bubble outlet 710 to the discharge port 41 can be reduced. Therefore, a larger proportion of the bubbles generated in the bubble generation unit 20 according to the discharging operation can be discharged from the discharge port 41.

  As shown in FIG. 2, the lower member 820 is configured to include, for example, a cylindrical portion having a columnar recess 821 that opens upward. A plurality of bubble outlets 710 are opened on the bottom surface of the recess 821. In the case of the present embodiment, as shown in FIG. 3, eight bubble outlets 710 are arranged at equal angular intervals on the peripheral portion of the bottom surface of the recess 821.

As shown in FIG. 2, the upper member 830 is formed in a vertically elongated columnar shape. A hole that vertically penetrates the upper member 830 is formed in the central portion of the upper member 830. The internal space of this hole constitutes a narrow channel 730.
The lower portion of the upper member 830 is a fitting portion 832 that is fitted and fixed to the upper portion of the recess 821 of the lower member 820.
The lower end surface 831 of the upper member 830 is arranged at a position separated upward from the bottom surface of the recess 821.
A space below the concave portion 821, that is, a space located at a facing distance between the lower end surface 831 of the upper member 830 and the concave portion 821 constitutes an upstream flow path 720.
As shown in FIG. 3, when viewed in the axial direction at the upstream end 731 of the narrow channel 730, the plurality of bubble outlets 710 are preferably arranged inside the outline of the upstream channel 720. .

  The flow passage area of the communication flow passage 32d and the flow passage area of the in-nozzle foam flow passage 90 are larger than the flow passage area of the fine flow passage 730. That is, the downstream channel 740 is arranged adjacent to the downstream side of the narrow channel 730 and has a larger channel area than the narrow channel 730.

In the case of the present embodiment, the foam dispenser 100 does not include a mesh that miniaturizes the generated foam. Therefore, even when the liquid 101 contains the scrubbing agent, bubbles can be appropriately generated and discharged.
However, the present invention is not limited to this example, and the foam ejector 100 may include a mesh that miniaturizes the generated foam. For example, a mesh can be arranged at the boundary between the bubble generation unit 20 and the upstream flow path 720, and in this case, each lattice-shaped opening of the mesh becomes the bubble outlet 710.

Each of FIG. 4A, FIG. 4B, FIG. 4C, and FIG. 4D is a diagram showing an image obtained by imaging the bubbles discharged by the bubble discharger 100 according to the present embodiment. .. More specifically, in the images shown in FIGS. 4A to 4D, the length dimension L1 is 5.7 mm, the length dimension L2 is 18 mm, the inner diameter D of the narrow channel 730 is 3.2 mm, and the bubble outlet is provided. 7 is an image of bubbles when the inner diameter of 710 is 1.0 mm and the inner diameter of the upstream channel 720 is 7.0 mm.
On the other hand, FIGS. 6(a), 6(b), 6(c), and 6(d) each show an image obtained by imaging bubbles ejected by the bubble ejector (not shown) according to the comparative embodiment. FIG.
The foam dispenser according to the comparative embodiment is different from the foam dispenser 100 according to the present embodiment in that it does not have the upper member 830 (that is, does not have the narrow channel 730), and other points. Then, it is configured similarly to the foam dispenser 100 according to the present embodiment.
FIGS. 4A and 6A are images of bubbles ejected at a speed (pressing speed) of pressing down the head member 30 of 10 mm/sec. FIGS. 4(b) and 6(b) are images of bubbles ejected at a pressing speed of 30 mm/sec, and FIGS. 4(c) and 6(c) eject at a pressing speed of 50 mm/sec. 4D and 6D are images of bubbles discharged at a pressing speed of 70 mm/sec.
The foam discharged by the foam discharger 100 according to the present embodiment is finer and more uniform than the foam discharged by the foam discharger according to the comparative embodiment, regardless of the pressing speed. That is, the bubbles could be finely discharged regardless of the flow velocity of the bubbles passing through the bubble flow path 700.

Compared to the example in which images of bubbles are shown in FIGS. 4(a) to 4(d), even in an example different in that the inner diameter D is 4.0 mm, the bubbles are finely and uniformly irrespective of the pressing speed. It was
In the example (described later) shown in FIG. 5A, in which the inner diameter D is 3.2 mm and the inner diameter D is 4.0 mm, the bubbles are finely tuned regardless of the pressing speed. Became uniform.

<Modification of vertical cross-sectional shape of narrow channel>
Next, a modified example of the cross-sectional shape along the longitudinal direction of the narrow channel 730 will be described.
In the example shown in FIGS. 5A and 5B, the flow passage area of the fine flow passage 730 is repeatedly expanded and contracted from the upstream side to the downstream side. With such a structure, the bubbles can be further miniaturized.
It is not clear why the bubble can be made finer by repeating the expansion and contraction of the flow passage area of the fine flow passage 730, but when the bubble passes through the fine flow passage 730, the flow velocity of the bubble also increases or decreases according to the change of the flow passage area. It is considered that the repetition of the step promotes the division of bubbles, which contributes to the miniaturization of bubbles.
The number of times that the flow passage area of the fine flow passage 730 is expanded or reduced may be once.
As shown in FIG. 5A, the upstream end portion 734 of the narrow channel 730 may have a channel area that extends from the upstream end 731 toward the downstream side. In addition, the downstream end portion 735 of the narrow channel 730 may have a channel area that extends from the downstream end 732 toward the upstream side.
As shown in FIG. 5B, the upstream end portion 734 of the narrow channel 730 may have a narrower channel area from the upstream end 731 toward the downstream side. Further, the downstream end portion 735 of the narrow channel 730 may have a channel area narrowed from the downstream end 732 toward the upstream side.
In the cross section along the longitudinal direction of the narrow channel 730, the outer shape line 733 of the narrow channel 730 on both ends in the direction orthogonal to the longitudinal direction is a wavy line as shown in FIG. 5(a) and FIG. 5(b). The shape may be a curved line shape, or a linear broken line shape (not shown).
In the example of FIGS. 5A and 5B, the small-diameter passage 730 has a bellows shape.

  The present invention is not limited to the above-described embodiments, and includes various modifications, improvements, etc. as long as the object of the present invention is achieved.

  For example, the axis of the narrow channel 730 does not necessarily have to extend in a straight line, but may extend in a curved line. For example, the axis of the narrow channel 730 may be bent in an arc shape. As an example, the narrow channel 730 having a bent shape may be formed by pushing the upper member 830 made of rubber into the bent tubular portion. With this configuration, for example, the upstream side portion of the narrow channel 730 extends vertically, and the downstream side portion of the narrow channel 730 extends horizontally or substantially horizontally along the in-nozzle foam channel 90. it can.

  Further, the upper member 830 may have a divided structure that is divided at one location or a plurality of locations in the longitudinal direction of the narrow channel 730. By doing so, it is possible to easily realize a structure in which the narrow channel 730 repeats expansion and contraction from the upstream side to the downstream side.

  Further, the various constituent elements of the foam dispenser 100 described above do not have to be independently present, a plurality of constituent elements are formed as one member, and one constituent element is a plurality of members. It is allowed to be formed, a certain component is a part of another component, a part of a certain component overlaps a part of another component, and the like.

The above embodiments include the following technical ideas.
<1> A bubble generation unit that generates bubbles from a liquid, a bubble flow path through which the bubbles generated by the foam generation unit pass, and a discharge port that discharges bubbles that have passed through the foam flow channel, The bubble channel is an upstream channel, a narrow channel disposed adjacent to the downstream side of the upstream channel and having a channel area smaller than that of the upstream channel, and a downstream side of the narrow channel. A plurality of foam outlets, each of which is arranged adjacent to and has a downstream flow passage having a flow passage area larger than that of the narrow flow passage, and wherein the foam generating unit is open toward the upstream flow passage. And a foam discharger in which the length dimension of the narrow channel is larger than the length dimension of the upstream channel.
<2> The foam dispenser according to <1>, wherein the fine flow passage is arranged in a central portion of the upstream flow passage when viewed in the axial direction at the upstream end of the fine flow passage.
<3> The foam dispenser according to <2>, in which the fine channel is arranged at a position closer to the center than the arrangement area of the plurality of foam outlets when viewed in the axial direction.
<4> The foam dispenser according to any one of <1> to <3>, wherein the length dimension L2 of the narrow channel is 3 mm or more.
<5> The length dimension L2 of the narrow channel is preferably 5 mm or more, the length dimension L2 is preferably 40 mm or less, and more preferably 20 mm or less. <1> to <4> The foam dispenser according to claim 1.
<6> The foam dispenser according to any one of <1> to <5>, in which the length dimension L1 of the upstream flow path is 1 mm or more.
<7> The length dimension L1 of the upstream channel is preferably 2 mm or more, and the length dimension L1 is preferably 10 mm or less. <1> to <6> Foam dispenser.
<8> The foam discharge according to any one of <1> to <7>, in which the flow passage area changes discontinuously at the boundary between the downstream end of the upstream flow passage and the upstream end of the narrow flow passage. vessel.
<9> The foam dispenser according to <8>, wherein a flow passage area at an upstream end of the narrow flow passage is 1% or more and 40% or less of a flow passage area at a downstream end of the upstream flow passage.
<10> The foam dispenser according to <8> or <9>, wherein the flow passage area at the upstream end of the narrow flow passage is 15% or more and 35% or less of the flow passage area at the downstream end of the upstream flow passage.
<11> The inner diameter or equivalent circle diameter of the narrow channel is preferably 0.5 mm or more and 6.0 mm or less, more preferably 1.0 mm or more and 4.0 mm or less, and 2.0 mm or more. Is more preferable <1> to the foam discharger as described in any one of <10>.
<12> The foam dispenser according to any one of <1> to <11>, in which the flow passage area of the narrow flow passage is repeatedly expanded and contracted from the upstream side to the downstream side.
<13> In the cross section along the longitudinal direction of the narrow channel, the outline of the narrow channel on both end sides in the direction orthogonal to the longitudinal direction is a wavy curved line. Discharger.
<14> A storage container that stores the liquid, and a mounting unit that is mounted on the storage container are provided, and the foam generating unit, the foam channel, and the discharge port are held by the mounting unit. The foam dispenser according to any one of 1> to <13>.
<15> A liquid-filled foam dispenser including the foam dispenser according to <14> and the liquid filled in the storage container.

10 Storage Container 11 Body 13 Mouth Neck 20 Bubble Generation Unit 30 Head Member 31 Operation Receiving Unit 32 Inner Cylinder 32c Holding Part 32d Communication Flow Path 33 Outer Cylinder 40 Nozzle 41 Discharge Port 90 Nozzle Foam Flow 100 Discharger 101 Liquid 110 Cap member 111 Mounting part 112 Annular closing part 113 Standing cylinder part 128 Dip tube 200 Foam discharge cap 500 Liquid filling foam discharger 600 Pump part 700 Foam channel 710 Foam outlet 720 Upstream channel 722 Downstream end 730 Narrow channel 731 Upstream end 732 Downstream end 733 Outline line 734 Upstream end 735 Downstream end 740 Downstream channel 820 Lower member 821 Recessed part 830 Upper member 831 Lower end surface 832 Fitting part

Claims (9)

A foam generation unit that generates foam from a liquid,
A foam flow path through which the foam generated by the foam generation unit passes,
A discharge port for discharging the foam that has passed through the foam flow path,
Equipped with
The foam channel is
An upstream channel,
A narrow channel having a smaller channel area than the upstream channel, which is arranged adjacent to the downstream side of the upstream channel.
A downstream side flow passage having a larger flow passage area than the narrow passage, which is arranged adjacent to the downstream side of the narrow passage.
Including,
The foam generating unit has a plurality of foam outlets each opening toward the upstream flow path,
A foam dispenser in which the length dimension of the narrow channel is larger than the length dimension of the upstream side channel.   The foam dispenser according to claim 1, wherein the narrow channel is arranged in a central portion of the upstream side channel when viewed in the axial direction at the upstream end of the narrow channel.   The foam discharger according to claim 2, wherein the narrow channel is arranged at a position closer to the center than the arrangement area of the plurality of foam outlets when viewed in the axial direction.   The bubble discharger according to any one of claims 1 to 3, wherein a length dimension of the narrow channel is 3 mm or more.   The foam dispenser according to any one of claims 1 to 4, wherein the upstream side flow path has a length dimension of 1 mm or more.   The bubble discharger according to any one of claims 1 to 5, wherein a flow passage area changes discontinuously at a boundary between a downstream end of the upstream flow passage and an upstream end of the narrow flow passage.   The foam dispenser according to claim 6, wherein a flow passage area at an upstream end of the narrow flow passage is 1% or more and 40% or less of a flow passage area at a downstream end of the upstream flow passage. A storage container for storing the liquid,
A mounting portion mounted on the storage container,
Equipped with
The foam dispenser according to any one of claims 1 to 7, wherein the foam generating unit, the foam flow path, and the discharge port are held by the mounting unit. A foam dispenser according to claim 8;
The liquid filled in the storage container,
Liquid-filled foam dispenser comprising.