Bubble discharge container, fitting cap and nozzle

Abstract

To provide a bubble discharge container that can reduce pressurizing force required for discharging bubbles to increase discharged bubbles, while securely discharging bubbles by a certain distance, a fitting cap and a nozzle.SOLUTION: A bubble discharge container, which comprises a container main body that can store liquid, further comprises a mixing chamber that mixes liquid with air to generate bubbles, and a nozzle that can discharge the bubbles generated in the mixing chamber. The nozzle has a discharge port that can discharge the bubbles generated in the mixing chamber, and a nozzle flow passage through which the bubbles are flowed toward the discharge port. The nozzle flow passage has a reduced flow passage part whose diameter gradually reduces toward the discharge port. A diameter of the discharge port is formed to be smaller than a diameter of an inflow port pf the reduced flow passage part, where the diameter of the discharge port is 1.7 mm or more and 2.5 mm or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a foam dispenser container, an attachment cap, and a nozzle. [Background technology]

[0002] Conventionally, there has been known a foam dispensing container equipped with a nozzle capable of dispensing foam, in which the diameter of the nozzle outlet is made smaller than the diameter of the nozzle inlet in order to ensure the foam dispensing distance, thereby increasing the foam dispensing speed (Patent Document 1, etc.). In conventional foam dispensing containers, foam is discharged from the nozzle by, for example, pressing a container body capable of containing liquid or an attachment cap attached to the container body to pressurize the liquid and air inside the container body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2004-057574 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional foam dispenser containers, the diameter of the nozzle outlet is smaller than the diameter of the nozzle inlet, which increases the pressure required to dispense the foam, and this can increase the burden on the user when using the foam dispenser container. In addition, there is also a problem that the amount of foam dispensed can decrease as the pressure increases.

[0005] The present invention relates to a foam dispensing container, an attachment cap, and a nozzle that can reduce the pressure required to dispense foam while ensuring the foam dispensing distance, thereby increasing the amount of foam dispensed. [Means for solving the problem]

[0006] The foam-dispensing container of the present invention is a foam-dispensing container having a container body capable of containing liquid, and is equipped with a mixing chamber that mixes liquid and air to generate foam, and a nozzle that can discharge the foam generated in the mixing chamber, the nozzle having an outlet that can discharge the foam generated in the mixing chamber, and a nozzle flow path that causes the foam to flow toward the outlet, the nozzle flow path having a reduced flow path section whose diameter reduces toward the outlet, the diameter of the outlet being smaller than the diameter of the inlet of the reduced flow path section, and the diameter of the outlet being 1.7 mm or more and 2.5 mm or less.

[0007] In addition, the attachment cap of the present invention is an attachment cap configured to be attached to a container body capable of containing a liquid, and is equipped with a mixing chamber that mixes liquid and air to generate foam, and a nozzle that can eject the foam generated in the mixing chamber, the nozzle having an outlet that can eject the foam generated in the mixing chamber, and a nozzle flow path that causes the foam to flow toward the outlet, the nozzle flow path having a reduced flow path section whose diameter reduces toward the outlet, the diameter of the outlet is formed smaller than the diameter of the inlet of the reduced flow path section, and the diameter of the outlet is 1.7 mm or more and 2.5 mm or less.

[0008] Furthermore, the nozzle according to the present invention is a nozzle capable of ejecting a foam generated by mixing a liquid and a gas, and has an outlet capable of ejecting the generated foam, and a nozzle flow path for causing the foam to flow toward the outlet, the nozzle flow path having a reduced flow path section whose diameter reduces toward the outlet, the diameter of the outlet being smaller than the diameter of the inlet of the reduced flow path section, and the diameter of the outlet being 1.7 mm or more and 2.5 mm or less. Effect of the Invention

[0009] The foam dispensing container, attachment cap, and nozzle of the present invention make it possible to reduce the pressure required to dispense foam while ensuring the foam dispensing distance, thereby increasing the amount of foam dispensed. [Brief description of the drawings]

[0010] [Figure 1] FIG. 2 is a perspective view showing a foam dispensing container according to the present embodiment. [Diagram 2] FIG. 2 is a plan view showing the foam dispensing container according to the present embodiment. [Diagram 3] FIG. 2 is an exploded view of the foam dispensing container according to the embodiment. [Figure 4] FIG. 3 is a cross-sectional view taken along the line AA′ in FIG. 2. [Diagram 5] FIG. 3 is a cross-sectional view taken along line BB' in FIG. [Figure 6] 11 is a cross-sectional view of the mounting cap in a state in which the outside air introduction passage and the foam passage are in communication with each other. FIG. [Figure 7] 11 is a cross-sectional view of the mounting cap when the outside air introduction passage and the foam passage are in a non-communicating state. FIG. [Figure 8] 7 is a cross-sectional view taken along line CC' in FIG. 6. [Figure 9] 8 is a cross-sectional view taken along the line DD' in FIG. 7. [Figure 10] FIG. 2 is a partially enlarged view showing a nozzle according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention. In addition, in the present embodiments, the scale and dimensions of each component may be exaggerated, and some components may be omitted.

[0012] [Overall configuration of foam dispenser container] The foam-dispensing container 1 according to this embodiment is a foam-dispensing container used for dispensing foamed liquid such as a foaming detergent or hair dye (hereinafter simply referred to as "liquid") in the form of foam, and is preferably a squeeze foamer container. Specifically, as shown in Figs. 1 to 5, the foam-dispensing container 1 comprises a container body 10 capable of containing liquid, and an attachment cap 20 attached to the container body 10. In this embodiment, the attachment cap 20 is configured to be detachable from the container body 10.

[0013] Hereinafter, in this specification, the direction from the container body 10 toward the attached cap 20 (the opposite side to the container body 10 when viewed from the attached cap 20) will be described as "upper", and the opposite direction (the container body 10 side when viewed from the attached cap 20) will be described as "lower". Also, the state in which the attached cap 20 is positioned above the container body 10 will be referred to as the "upright state". Furthermore, a cross section along the vertical direction will be referred to as a "longitudinal cross section", and a cross section in a direction perpendicular to the vertical direction will be referred to as a "horizontal cross section".

[0014] [Container body configuration] 1 and 3 to 5, the container body 10 is a container made of synthetic resin formed, for example, by blow molding, and includes a bottom 11, a tubular body 12 extending upward from the periphery of the bottom 11, and a cylindrical mouth 13 provided above and in the center of the body 12. As shown in Figs. 3 to 5, the container body 10 is formed as a bottomed cylinder overall with only the upper end of the mouth 13 open, and is configured to be able to contain liquid within the internal space defined by the bottom 11 and the body 12.

[0015] The bottom 11 has an elliptical shape having a major axis and a minor axis. The bottom 11 has an outer diameter substantially the same as the outer diameter of the lower end of the body 12, and the body 12 extends upward from the upper surface of the bottom 11. That is, in this embodiment, the container body 10 has a raised bottom structure in which only the bottom 11 contacts the placement surface when placed on a placement surface such as a floor surface. The container body 10 according to this embodiment has such a raised bottom structure, which has the advantage that the deformation rate during squeeze deformation (i.e., the reduction rate of the volume of the container body 10) can be increased.

[0016] The body 12 has flexibility that allows it to be deformed by a squeezing operation by the user. The body 12 has a shape and size that allows it to be held by the hand of the user. Specifically, as shown in Figs. 1 to 3, the body 12 has an elliptical cylindrical shape in horizontal cross section having a major axis and a minor axis, and both ends on the major axis side at the vertical center are recessed toward the inside in the radial direction. That is, the body 12 has a constricted portion 12a formed at the vertical center (direction from the bottom 11 to the mouth 13), an upper portion 12b located on the upper end side (mouth 13 side) of the constricted portion 12a, and a lower portion 12c located on the lower end side (bottom 11 side) of the constricted portion 12a. In the following, the "long axis of the body 12" means the long axis in the horizontal cross section of the body 12, and the "short axis of the body 12" means the short axis in the horizontal cross section of the body 12.

[0017] In a vertical cross section along the major axis of body 12 (cross section along line AA' in Fig. 2), constricted portion 12a has a shape curved radially inward as shown in Fig. 4, but in a vertical cross section along the minor axis of body 12 (cross section along line BB' in Fig. 2), it has a substantially linear shape as shown in Fig. 5. That is, constricted portion 12a is configured so that the shape of substantially all horizontal cross sections in the up-down direction is an elliptical cylindrical cross section.

[0018] 4, the upper portion 12b of the body portion 12 has a shape that curves upward and radially inward from the upper end of the constricted portion 12a toward the mouth portion 13. The lower portion 12c of the body portion 12 has a shape that slopes downward and radially outward in a substantially linear manner from the lower end of the constricted portion 12a toward the bottom portion 11. In this embodiment, the width in the major axis direction of the upper portion 12b is set to be larger than the width in the major axis direction of the lower portion 12c, but is not limited to this.

[0019] As described above, the container body 10 according to this embodiment has the advantage that the horizontal cross-sectional shape of the body 12 is an elliptical cylindrical shape, making it possible to eject foam over a long distance with a small amount of distortion. Furthermore, the container body 10 according to this embodiment has the advantage that it is easy to grip, and the gripping position can be guided to the constricted portion 12a, by virtue of having the constricted portion 12a. Furthermore, in the longitudinal section (cross section along line AA' in FIG. 2) along the long axis of the body 12, the container body 10 according to the present embodiment is formed in a substantially S-shaped cross section, in which the upper portion 12b is curved radially outward and then curved radially inward at the constricted portion 12a, and the lower portion 12c extends radially outward in a substantially straight line from the constricted portion 12a to the bottom portion 11, but in the longitudinal section (cross section along line BB' in FIG. 2) along the short axis of the body 12, the upper portion 12b, the constricted portion 12a, and the lower portion 12c are shaped to be continuous in a substantially straight line in the vertical direction. By having such a shape, the container body 10 according to the present embodiment has the advantage that it is less susceptible to the resistance of the constricted portion 12a during squeeze deformation, and can eject foam far with a small squeezing force.

[0020] 3, the mouth portion 13 has a circular cross section in a direction perpendicular to the up-down direction. The mouth portion 13 has a large diameter mouth portion 13a provided in the upper center of the body portion 12, and a small diameter mouth portion 13b having a smaller diameter than the large diameter mouth portion 13a. A screw thread is formed on the outer circumferential surface of the small diameter mouth portion 13b in a spiral shape along the circumferential direction, so that an inner attachment cap 30 (described later) of the attachment cap 20 can be screwed onto it.

[0021] The material of the container body 10 is preferably an elastic material that is excellent in both flexibility to be deformed by a squeeze operation by a user and in restoration when an external force is removed. From this viewpoint, the container body 10 is preferably made of one or more materials selected from polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and ethylene-vinyl alcohol copolymer (EVOH). In addition, the container body 10 is preferably formed by integral molding using the above-mentioned materials, but is not limited thereto, and may be configured by integrating the bottom 11, body 12, and mouth 13 molded as separate members.

[0022] The shape and material of the container body 10 are not limited to the above-mentioned configuration, and various known shapes and materials can be adopted.

[0023] [Installation cap configuration] As shown in Figures 3 to 7, the attachment cap 20 comprises an inner attachment cap 30 attached to the mouth 13 of the container body 10, an outer attachment cap 40 attached so as to be movable relative to the inner attachment cap 30, a nozzle 50 attached to the upper end of the outer peripheral surface of the outer attachment cap 40, and a dip tube 60 attached to the lower end of the inner attachment cap 30.

[0024] 4 to 7, the inner attachment cap 30 includes a cylindrical portion 31, a large diameter cylindrical portion 32 provided above the cylindrical portion 31, a small diameter cylindrical portion 33 provided below the cylindrical portion 31, a valve seat portion 34 provided between the cylindrical portion 31 and the small diameter cylindrical portion 33, an annular bottom portion 35 extending radially outward from the upper end of the outer circumferential surface of the cylindrical portion 31, a plurality of lower wall portions 36 extending upward from the annular bottom portion 35, and an outer wall portion 37 extending downward from the outer circumferential edge of the annular bottom portion 35, and is formed into a generally umbrella shape. The inner attachment cap 30 also includes a ball valve 38 configured to be mounted on the valve seat portion 34.

[0025] The cylindrical portion 31 is formed in a cylindrical shape with an open upper end and lower end. The inner peripheral surface of the cylindrical portion 31 is inclined radially inward from the upper end (the end on the foam flow path 23 side described later) of the cylindrical portion 31 to the lower end (the end on the liquid flow path 22 side described later). That is, the cylindrical portion 31 has an inner peripheral surface that tapers downward and radially inward. The diameter of the inner peripheral surface of the cylindrical portion 31 is formed to be larger than the diameter of the ball valve 38. With such a configuration, the cylindrical portion 31 according to this embodiment has the advantage of being able to smoothly move the ball valve 38 inside the cylindrical portion 31 and to reliably guide the ball valve 38 toward the valve seat portion 34.

[0026] As shown in Figs. 6, 7 and 9, the cylindrical portion 31 is formed with a plurality of grooves 31a that are recessed from the inner peripheral surface of the cylindrical portion 31 toward the outside in the radial direction and extend along the axial direction of the cylindrical portion 31. In this embodiment, as shown in Fig. 9, eight grooves 31a are formed at intervals of 45 degrees in the circumferential direction. Each groove 31a has a cross section perpendicular to the axial direction of the cylindrical portion 31 that is formed in a substantially U-shape. The shape, number and intervals of the grooves 31a are not limited to the structure shown in the drawings and can be arbitrarily changed as long as the function of the grooves 31a is not impaired.

[0027] In addition, the cylindrical portion 31 has a plurality of grooves 31a formed on its inner circumferential surface, and a rib 31b is formed between adjacent grooves 31a as shown in Fig. 9. That is, eight ribs 31b are formed at 45 degree intervals in the circumferential direction so as to be alternately positioned with the grooves 31a. The ribs 31b function as a guide for the up and down movement of the ball valve 38, and the protruding end faces of each rib 31b form the inner circumferential surface of the cylindrical portion 31. Each rib 31b is inclined radially inward of the cylindrical portion 31 from the upper end (the end on the foam flow path 23 side described later) of the cylindrical portion 31 to the lower end (the end on the liquid flow path 22 side described later).

[0028] The cylindrical portion 31 having the above configuration has therein a mixing chamber 21 in which liquid and air are mixed to generate foam, as shown in Figures 6 and 7. In this embodiment, the mixing chamber 21 is a space defined by the inner circumferential surface of the cylindrical portion 31 (i.e., the protruding end surfaces of each rib 31b), the groove portion 31a, a mesh member (not shown) described below, and the upper end of the valve seat portion 34.

[0029] The large diameter cylindrical portion 32 is formed in a cylindrical shape extending further upward from the upper end of the cylindrical portion 31, and has a larger diameter than the cylindrical portion 31. The large diameter cylindrical portion 32 is configured to be able to accommodate a mesh holding member 70 capable of holding a mesh member (not shown) in an internal space defined by the upper end of the cylindrical portion 31 and the inner circumferential surface of the large diameter cylindrical portion 32.

[0030] The mesh holding member 70 is composed of an outer mesh holding member 71 and an inner mesh holding member 72. The outer mesh holding member 71 is formed in a cylindrical shape with the center portions of the upper and lower ends open. The inner mesh holding member 72 is formed in a cylindrical shape with the upper and lower ends open, and has a smaller diameter than the outer mesh holding member 71. The inner mesh holding member 72 is arranged concentrically inside the outer mesh holding member 71. The mesh holding member 70 is configured to be able to hold a mesh member by sandwiching the mesh member between the inner surface of the lower end of the outer mesh holding member 71 and the inner mesh holding member 72.

[0031] The small diameter tubular portion 33 is formed in a cylindrical shape extending further downward from the lower end of the tubular portion 31, and has a smaller diameter than the tubular portion 31. The small diameter tubular portion 33 is configured to be capable of holding the dip tube 60. Specifically, the small diameter tubular portion 33 is configured to be capable of holding the dip tube 60 by inserting the dip tube 60 into the small diameter tubular portion 33.

[0032] The dip tube 60 is formed in a tubular shape penetrating from the upper end to the lower end, and its upper end is inserted into the small diameter cylindrical portion 33. The dip tube 60 has a length such that its lower end reaches the vicinity of the bottom 11 of the container body 10. The internal space of the dip tube 60 functions as a liquid flow path 22 that introduces liquid from inside the container body 10 to the mixing chamber 21.

[0033] The valve seat 34 is provided between the cylindrical portion 31 and the liquid flow path 22, and is in communication with the cylindrical portion 31 and the liquid flow path 22. In this embodiment, the valve seat 34 is formed between the lower end of the cylindrical portion 31 and the upper end of the small diameter cylindrical portion 33. The valve seat 34 has a curved inner surface that tapers from the lower end of the cylindrical portion 31 to the upper end of the small diameter cylindrical portion 33, and the inner surface has a shape that allows the ball valve 38 to fit closely thereto. Specifically, the inner surface of the valve seat 34 has approximately the same radius of curvature as the radius of curvature of the ball valve 38.

[0034] The annular bottom 35 is formed in an annular shape extending radially outward from the upper end of the outer circumferential surface of the cylindrical portion 31, and is coaxial with the cylindrical portion 31. The annular bottom 35 has a through hole 35a formed penetrating from the upper surface to the lower surface of the annular bottom 35 in a portion between the large-diameter cylindrical portion 32 and the inner circumferential surface of a first lower wall portion 36a described below. A plurality of through holes 35a (four in this embodiment) are formed at intervals in the circumferential direction of the annular bottom 35.

[0035] The lower wall portion 36 has a first lower wall portion 36a provided radially outward from the annular bottom portion 35 than the large diameter cylindrical portion 32, a second lower wall portion 36b provided radially outward from the annular bottom portion 35 than the first lower wall portion 36a, and a third lower wall portion 36c provided radially outward from the annular bottom portion 35 than the second lower wall portion 36b.

[0036] The first lower wall portion 36a is formed in a cylindrical shape that is open at the top, and is coaxial with the tubular portion 31. The first lower wall portion 36a has a diameter and an axial length (in this embodiment, a length that is approximately one-third the axial length of the large diameter tubular portion 32) that enable the inner peripheral surface of the first lower wall portion 36a and the outer peripheral surface of the third upper wall portion 48c to be in close contact with each other in a non-communicating state described below.

[0037] The second lower wall portion 36b is formed in a cylindrical shape with an open top, and is coaxial with the tubular portion 31. The second lower wall portion 36b has a diameter and an axial length (in this embodiment, a length approximately twice the axial length of the first lower wall portion 36a) that enable the outer circumferential surface of the second lower wall portion 36b and the inner circumferential surface of the fourth upper wall portion 48d to be in close contact with each other in a communication state described below.

[0038] The third lower wall portion 36c is formed in a cylindrical shape that is open at the top, and is coaxial with the tubular portion 31. Moreover, the third lower wall portion 36c has approximately the same length in the axial direction as the second lower wall portion 36b.

[0039] In this embodiment, the inner attachment cap 30 is configured so that a second upper wall portion 48b and a third upper wall portion 48c (described later) of the outer attachment cap 40 can be inserted into a space defined by the outer peripheral surface of the large diameter cylindrical portion 32, the upper surface of the annular bottom portion 35, and the inner peripheral surface of the first lower wall portion 36a. The inner attachment cap 30 is also configured so that a fourth upper wall portion 48d (described later) of the outer attachment cap 40 can be inserted into a space defined by the outer peripheral surface of the second lower wall portion 36b, the upper surface of the annular bottom portion 35, and the inner peripheral surface of the third lower wall portion 36c.

[0040] The outer wall portion 37 has a small diameter outer wall portion 37a extending downward from the outer periphery of the small diameter outer wall portion 37a and a large diameter outer wall portion 37b provided below the small diameter outer wall portion 37a and having a larger diameter than the small diameter outer wall portion 37a. The small diameter outer wall portion 37a has an inner diameter larger than the outer diameter of the small diameter opening portion 13b of the opening portion 13. The large diameter outer wall portion 37b has an inner diameter larger than the outer diameter of the large diameter opening portion 13a of the opening portion 13.

[0041] Further, the inner peripheral surface of the small diameter outer wall portion 37a is provided with a screw groove formed helically along the circumferential direction, and is configured to be able to screw into a screw thread formed on the outer peripheral surface of the small diameter opening portion 13b of the opening portion 13. That is, in this embodiment, the inner attachment cap 30 is attached to the opening portion 13 by screwing the screw groove provided on the small diameter outer wall portion 37a of the outer wall portion 37 into the screw thread provided on the small diameter opening portion 13b of the opening portion 13.

[0042] On the other hand, the outer peripheral surface of the small diameter outer wall portion 37a is provided with a screw thread formed in a spiral shape along the circumferential direction, and is configured to be able to screw into a screw groove provided on the peripheral wall portion 42 of the outer mounting cap 40, which will be described later.

[0043] The ball valve 38 is disposed between the liquid flow path 22 and the mixing chamber 21, and is configured to be capable of opening and closing the liquid flow path 22. Specifically, the ball valve 38 is configured to be capable of switching between a closed state in which the ball valve 38 is in close contact with the valve seat 34 to restrict the flow of liquid, etc., and an open state in which the ball valve 38 is separated from the valve seat 34 to allow the flow of liquid. That is, the ball valve 38 is configured to cooperate with the valve seat 34 to function as a check valve that allows the flow of liquid from the internal space of the container body 10 toward the mixing chamber 21, and prevents the flow of liquid, etc. in the opposite direction (from the mixing chamber 21 toward the internal space of the container body 10).

[0044] More specifically, when the internal pressure of the container body 10 increases as a result of the deformation of the barrel 12 of the container body 10 by a squeeze operation by the user, the ball valve 38 moves in a direction away from the valve seat 34 to communicate the liquid flow path 22 with the mixing chamber 21, thereby allowing the inflow of liquid from the container body 10 to the mixing chamber 21. In addition, when the user stops the squeeze operation and the container body 10 restores its original shape due to its own elasticity, causing the inside of the container body 10 to become negative pressure, the ball valve 38 is configured to come into close contact with the valve seat 34 to bring the liquid flow path 22 and the mixing chamber 21 into a non-communicating state, thereby preventing the backflow of liquid, etc. from the mixing chamber 21 to the container body 10.

[0045] In this embodiment, no valve guard that restricts the upward and downward movement of the ball valve 38 is formed inside the cylindrical portion 31. This allows the ball valve 38 to move upward and downward over substantially the entire axial range of the cylindrical portion 31.

[0046] The mounting cap 20 also includes an air introduction hole 39 for introducing air from the inside of the container body 10 into the mixing chamber 21. As shown in Figs. 6, 7, and 9, the air introduction hole 39 is an opening that communicates the internal space of the container body 10 with the mixing chamber 21, and is formed on the valve seat portion 34 side from the upper ends of the groove portion 31a and the rib 31b. Specifically, the air introduction hole 39 is provided between the groove portion 31a and the valve seat portion 34, or on the inner circumferential surface of the cylindrical portion 31 including the groove portion 31a. In this embodiment, the air introduction hole 39 is provided between the groove portion 31a and the valve seat portion 34. The air introduction hole 39 can be formed at any position between the groove portion 31a and the valve seat portion 34, or on the inner circumferential surface of the cylindrical portion 31 including the groove portion 31a. However, from the viewpoint of ensuring the distance from the mixing location of the gas and the liquid to the mesh member, it is preferable to provide the air introduction hole 39 on the valve seat portion 34 side from the center of the extension direction of the groove portion 31a.

[0047] 9, a plurality of air introduction holes 39 are provided along the circumferential direction of the cylindrical portion 31. In this embodiment, the air introduction holes 39 are provided at positions corresponding to the groove portions 31a, that is, between the adjacent ribs 31b. Note that the number and arrangement of the air introduction holes 39 in the circumferential direction are not limited to the example shown in the figure, and any of various configurations can be adopted as long as the configuration allows air to be introduced from inside the container body 10 into the mixing chamber 21.

[0048] With the above configuration, the inner attachment cap 30 is configured to mix the liquid supplied to the mixing chamber 21 via the liquid flow path 22 (dip tube 60) and the gas supplied to the mixing chamber 21 via the air introduction hole 39 in the mixing chamber 21 to generate foam. In addition, the inner attachment cap 30 is configured such that a mesh member is disposed at the outlet of the mixing chamber 21, and the mesh member can break down the foam generated in the mixing chamber 21 to generate finer foam.

[0049] The inner mounting cap 30 is formed by integral molding using materials such as polyethylene (PE), polypropylene (PP), and polyoxymethylene (POM) except for the ball valve 38. However, the configuration of the inner mounting cap 30 is not limited to this, and may be configured, for example, by integrating the cylindrical portion 31, the large diameter cylindrical portion 32, the small diameter cylindrical portion 33, the valve seat portion 34, the annular bottom portion 35, the lower wall portion 36, and the outer wall portion 37, which are molded as separate members. Also, various other known materials and molding methods may be adopted.

[0050] As shown in Figures 6 and 7, the outer attachment cap 40 has a top 41 and a cylindrical peripheral wall portion 42 extending downward from the periphery of the top 41, and is formed overall in the shape of a topped cylinder with an open lower end.

[0051] The top portion 41 is formed in a perfect circular and plate-like shape, and has a shape in which the diameter decreases toward the top. That is, the top portion 41 is formed in a curved shape at the portion between the apex portion and the peripheral wall portion 42. The peripheral wall portion 42 is formed in a cylindrical shape, and has an inner diameter larger than the outer diameter of the small diameter outer wall portion 37a of the inner attachment cap 30. The inner peripheral surface of the peripheral wall portion 42 is provided with a screw groove formed in a spiral shape along the circumferential direction, and is configured to be screwed into the screw thread formed on the outer peripheral surface of the small diameter outer wall portion 37a. That is, in this embodiment, the outer attachment cap 40 is attached to the inner attachment cap 30 by screwing the screw groove formed on the inner peripheral surface of the peripheral wall portion 42 into the screw thread formed on the outer peripheral surface of the small diameter outer wall portion 37a.

[0052] The outer mounting cap 40 also includes a nozzle holding portion 43 capable of holding a nozzle 50, a storage chamber 44 that houses a ball valve 45 and a ball storage portion 46 that houses the ball valve 45, a flow path forming portion 47 that forms a flow path for supplying foam supplied from the inner mounting cap 30 to the nozzle 50, and an upper wall portion 48 extending downward from the underside of the top 41.

[0053] The nozzle holding portion 43 is formed extending from the vicinity of the connection portion of the top portion 41 and the peripheral wall portion 42 toward the radially outer side of the top portion 41 and the peripheral wall portion 42, and is formed in a cylindrical shape with an open base end and a front end. That is, the nozzle holding portion 43 has an axis perpendicular to the axis of the top portion 41 and the peripheral wall portion 42. The nozzle holding portion 43 also has a large diameter holding portion 43a extending from the vicinity of the connection portion of the top portion 41 and the peripheral wall portion 42 toward the radially outer side of the top portion 41 and the peripheral wall portion 42, and a small diameter holding portion 43b having a smaller diameter than the large diameter holding portion 43a and extending from the front end of the large diameter holding portion 43a in the same direction as the extension direction of the large diameter holding portion 43a. The connection portion between the inner peripheral surface of the large diameter holding portion 43a and the inner peripheral surface of the small diameter holding portion 43b is formed in a flat shape without a step.

[0054] The nozzle holding portion 43 having the above configuration is configured to be able to hold the nozzle 50. Specifically, the nozzle holding portion 43 is configured to hold the nozzle 50 by fitting the inner nozzle base end 52 of the nozzle 50 inside the nozzle holding portion 43 and fitting the small diameter holding portion 43b between the inner nozzle base end 52 and the outer nozzle base end 53 of the nozzle 50.

[0055] The storage chamber 44 is provided on the opposite side to the side on which the nozzle holding part 43 is located in the direction along the axial direction of the nozzle holding part 43 (i.e., the direction in which foam is discharged by the nozzle 50). Specifically, the storage chamber 44 is provided in the vicinity of the connection portion of the top part 41 and the peripheral wall part 42.

[0056] The accommodation chamber 44 is formed in a U-shape recessed from the radially outer side toward the radially inner side of the top portion 41 and the peripheral wall portion 42, and has an accommodation wall portion 44a with a U-shaped horizontal cross section extending downward from the upper surface of the top portion 41, and an accommodation bottom portion 44b that closes the lower side of the accommodation wall portion 44a. In other words, the accommodation chamber 44 is configured to accommodate the ball valve 45 and the ball accommodation portion 46 in the space defined by the accommodation wall portion 44a and the accommodation bottom portion 44b.

[0057] The ball accommodating portion 46 is formed to extend upward from the accommodating bottom portion 44b of the accommodating chamber 44, and is formed in a cylindrical shape with an open upper end and lower end. Specifically, the ball accommodating portion 46 is formed to extend upward from the accommodating bottom portion 44b at a position where the ball accommodating portion 46 is connected to a third upper wall portion 48c and a fourth upper wall portion 48d described later. The upper end portion of the ball accommodating portion 46 has a shape that curves radially inward and upward of the ball accommodating portion 46. In other words, the upper end portion of the ball accommodating portion 46 has a shape in which the diameter decreases toward the upper end.

[0058] The ball accommodating portion 46 has a valve seat portion 46a on which the ball valve 45 can be placed, below the upper end portion where the diameter is reduced, and is configured to accommodate the ball valve 45 between the upper end portion of the ball accommodating portion 46 and the valve seat portion 46a. The valve seat portion 46a is formed to protrude radially inward from the inner peripheral surface of the ball accommodating portion 46, and has a curved inner surface on which the ball valve 45 can be closely attached. Specifically, the inner surface of the valve seat portion 46a has approximately the same radius of curvature as the radius of curvature of the ball valve 45.

[0059] The ball valve 45 is configured to be switchable between a closed state in which the ball valve 45 is in close contact with the valve seat 46a to restrict the flow of fluid, and an open state in which the ball valve 45 is separated from the valve seat 46a to allow the flow of fluid. That is, the ball valve 45 is configured to cooperate with the valve seat 46a to function as a check valve that allows the flow of air from the outside of the outer attachment cap 40 toward the inside of the outer attachment cap 40 and prevents the flow of liquid and air from the inside of the outer attachment cap 40 toward the outside of the outer attachment cap 40.

[0060] The flow path forming portion 47 is provided on the base end side of the nozzle holding portion 43 and communicates with the nozzle 50. Specifically, the flow path forming portion 47 is formed in a cylindrical shape that is coaxial with the nozzle holding portion 43, and both axial ends are formed to be open. That is, in this embodiment, the inner circumferential surface of the flow path forming portion 47 forms a flow path for supplying foam supplied from the inner-attached cap 30 to the nozzle 50.

[0061] The flow path forming portion 47 has an inner diameter smaller than the inner diameter of the nozzle holding portion 43. Since the inner diameter of the flow path forming portion 47 is smaller than the inner diameter of the nozzle holding portion 43 in this manner, there is an advantage that when the inner nozzle base end portion 52 of the nozzle 50 is fitted inside the nozzle holding portion 43, the position of the inner nozzle base end portion 52 of the nozzle 50 can be determined.

[0062] As shown in Figures 6 to 8, the upper wall portion 48 has a first upper wall portion 48a provided in the center of the top 41, a second upper wall portion 48b provided radially outward from the top 41 than the first upper wall portion 48a, a third upper wall portion 48c provided radially outward from the top 41 than the second upper wall portion 48b, and a fourth upper wall portion 48d provided radially outward from the top 41 than the third upper wall portion 48c.

[0063] The first upper wall portion 48a is formed in a cylindrical shape that is open at the bottom, and has a diameter and axial length that enable the outer peripheral surface of the first upper wall portion 48a to be in close contact with the inner peripheral surface of the large diameter cylindrical portion 32 in the non-discharge state described below.

[0064] The second upper wall portion 48b is formed in a substantially cylindrical shape that curves from the end of the flow passage forming portion 47 on the storage chamber 44 side toward the storage chamber 44, and is coaxial with the first upper wall portion 48a. The second upper wall portion 48b has a diameter and an axial length that can bring the inner peripheral surface of the second upper wall portion 48b into close contact with the outer peripheral surface of the large diameter cylindrical portion 32 in a discharge state described below. In this way, in a discharge state described below, the inner peripheral surface of the second upper wall portion 48b and the outer peripheral surface of the large diameter cylindrical portion 32 are in close contact with each other, which has the advantage of preventing bubbles from leaking from a gap between the inner peripheral surface of the second upper wall portion 48b and the outer peripheral surface of the large diameter cylindrical portion 32.

[0065] The third upper wall portion 48c is formed in a generally cylindrical shape curving from the outer circumferential surface of the flow path forming portion 47 toward the storage chamber 44, and is coaxial with the first upper wall portion 48a. Moreover, the third upper wall portion 48c has a diameter and an axial length that enable the outer circumferential surface of the third upper wall portion 48c and the inner circumferential surface of the first lower wall portion 36a to be in close contact with each other in a non-communicating state described below.

[0066] The fourth upper wall portion 48d is formed in a substantially cylindrical shape that curves from the outer circumferential surface of the flow passage forming portion 47 toward the storage chamber 44, and is coaxial with the first upper wall portion 48a. The fourth upper wall portion 48d has a diameter and an axial length that can bring the inner circumferential surface of the fourth upper wall portion 48d and the outer circumferential surface of the second lower wall portion 36b into close contact in a communication state described later. In this manner, in a communication state described later, the inner circumferential surface of the fourth upper wall portion 48d and the outer circumferential surface of the second lower wall portion 36b are in close contact with each other, so that the air flowing in from the upper end of the ball storage portion 46 is always guided to the through hole 35a, as described later, which is advantageous in that the flow direction of the air in the outside air introduction path 24 can be regulated.

[0067] The outer attachment cap 40 having the above configuration is configured to be movable relative to the inner attachment cap 30. The outer attachment cap 40 is also configured to be movable toward or away from the container body 10. Specifically, the outer attachment cap 40 is configured to be movable toward or away from the container body 10 by rotating relative to the inner attachment cap 30 in a state where the outer attachment cap 40 is screwed onto the inner attachment cap 30.

[0068] The outer attachment cap 40 is formed by integral molding using materials such as polyethylene (PE), polypropylene (PP), and polyoxymethylene (POM) except for the ball valve 45. However, the configuration of the outer attachment cap 40 is not limited to this, and for example, the top portion 41, the peripheral wall portion 42, the nozzle holding portion 43, the storage chamber 44, the ball storage portion 46, the flow path forming portion 47, and the upper wall portion 48, which are molded as separate members, may be integrated together. Also, various other known materials and molding methods may be adopted.

[0069] As shown in Figures 6 to 8 and 10, the nozzle 50 has a cylindrical nozzle tip portion 51 with open tip and base ends, a cylindrical inner nozzle base end portion 52 extending from the inner circumferential surface of the base end side of the nozzle tip portion 51 toward the base end side of the nozzle tip portion 51, and a cylindrical outer nozzle base end portion 53 extending from the outer circumferential surface of the base end side of the nozzle tip portion 51 toward the base end side of the nozzle tip portion 51.

[0070] The nozzle tip portion 51 is formed such that the inner and outer diameters are reduced from the base end to the tip, and has a discharge port 51a at its tip that can discharge the foam generated in the mixing chamber 21. The inner nozzle base end portion 52 has an inner diameter that is approximately the same as the inner diameter of the flow path forming portion 47, and has an inlet port 52a at its base end into which the foam supplied from the foam flow path 23 flows. The inner nozzle base end portion 52 also has an axial length that is approximately the same as the axial length of the nozzle holding portion 43. The outer nozzle base end portion 53 has an outer diameter that is approximately the same as the outer diameter of the large diameter holding portion 43a of the nozzle holding portion 43. The outer nozzle base end portion 53 also has an axial length that is approximately the same as the axial length of the small diameter holding portion 43b of the nozzle holding portion 43.

[0071] Moreover, the nozzle 50 according to this embodiment has a nozzle flow path 54 that causes the foam to flow from the inlet 52a toward the outlet 51a. In this embodiment, the internal space of the nozzle tip portion 51 and the internal space of the inner nozzle base end portion 52 function as the nozzle flow path 54.

[0072] The nozzle flow path 54 has a reduced flow path section 54a whose diameter is reduced toward the discharge port 51a. In this embodiment, the internal space of the nozzle tip portion 51 functions as the reduced flow path section 54a. In this embodiment, the inner diameter of the inner nozzle base end portion 52 is constant from the base end to the tip of the inner nozzle base end portion 52, and the inner diameter of the nozzle tip portion 51 is reduced from the base end to the tip of the nozzle tip portion 51, so that the internal space of the nozzle tip portion 51 functions as the reduced flow path section 54a. However, for example, if the inner diameter is reduced from the base end of the inner nozzle base end portion 52 to the tip of the nozzle tip portion 51, the internal space of the nozzle tip portion 51 and the internal space of the inner nozzle base end portion 52, i.e., the entire internal space of the nozzle 50, functions as the reduced flow path section 54a.

[0073] In this embodiment, the diameter of the outlet 51a (the inner diameter of the tip of the nozzle tip portion 51) is smaller than the diameter of the inlet of the reduced flow path portion 54a (the inner diameter of the base end of the nozzle tip portion 51). Specifically, from the viewpoint of increasing the foam ejection speed and ensuring the foam ejection distance, the diameter of the outlet 51a is preferably 30% to 45% of the diameter of the inlet of the reduced flow path portion 54a, more preferably 33% to 42%, and even more preferably 36% to 39%.

[0074] In addition, the diameter of the outlet 51a is preferably 1.7 mm or more, more preferably 2.0 mm or more, and even more preferably 2.2 mm or more, from the viewpoint of reducing the pressure required to eject the foam and increasing the amount of foam ejected. If the diameter of the outlet 51a is 1.8 mm or more, there is an advantage that good foam quality can be obtained and the amount of foam ejected can be further increased. In addition, the diameter of the outlet 51a is preferably 2.5 mm or less, from the viewpoint of ensuring the ejection distance of the foam.

[0075] In this embodiment, the inner circumferential surface of the nozzle 50 has an inclined inner circumferential surface 50a that inclines toward the radial center of the nozzle 50 from the inlet of the reduced flow path portion 54a (the base end of the inner circumferential surface of the nozzle tip portion 51) toward the outlet 51a, and a horizontal inner circumferential surface 50b that extends along the axial direction of the nozzle 50 from the end of the inclined inner circumferential surface 50a on the outlet 51a side toward the outlet 51a. That is, in this embodiment, the inner circumferential surface of the nozzle tip portion 51 has the inclined inner circumferential surface 50a and the horizontal inner circumferential surface 50b.

[0076] The length L1 (see Figure 10) of the horizontal inner surface 50b along the axial direction of the nozzle 50 is preferably 0.5 mm or more and 2.0 mm or less, more preferably 0.75 mm or more and 1.75 mm or less, and even more preferably 1.0 mm or more and 1.5 mm or less, from the viewpoint of improving foam cutting at the end of foam ejection.

[0077] Furthermore, as shown in Figure 10, in a cross section along the axis of nozzle 50, the angle θ1 between a straight line SL1 passing through both ends of the inclined inner surface 50a and a straight line SL2 extending along the axis of nozzle 50 is, from the standpoint of reducing the pressure force required to eject the foam and increasing the amount of foam ejected while ensuring the foam ejection distance, more preferably 50° or more and 70° or less, more preferably 52.5° or more and 67.5° or less, and even more preferably 55° or more and 65° or less.

[0078] In this embodiment, the outer peripheral surface of the nozzle 50 has an inclined outer peripheral surface 50c that is inclined in the foam discharge direction and toward the radial center of the nozzle 50, and a horizontal outer peripheral surface 50d that extends along the axial direction of the nozzle 50 from the end of the inclined outer peripheral surface 50c on the foam discharge direction side toward the foam discharge direction. Specifically, the inclined outer peripheral surface 50c is formed so as to be inclined toward the radial center of the nozzle 50 from the base end of the outer peripheral surface of the nozzle tip portion 51 toward the tip, and the horizontal outer peripheral surface 50d is formed so as to extend along the axial direction of the nozzle 50 from the tip of the inclined outer peripheral surface 50c toward the tip of the nozzle tip portion 51.

[0079] The length L2 (see Figure 10) along the axial direction of the inclined outer peripheral surface 50c and the horizontal outer peripheral surface 50d, i.e., the straight-line distance along the axial direction of the nozzle 50 from the base end to the tip of the outer peripheral surface of the nozzle tip portion 51, is preferably 3.5 mm or more and 6.0 mm or less, more preferably 4.0 mm or more and 5.5 mm or less, and even more preferably 4.5 mm or more and 5.0 mm or less, from the viewpoint of improving foam cutting at the end of foam ejection.

[0080] Furthermore, as shown in Figure 10, in a cross section along the axis of the nozzle 50, the angle θ2 between a straight line SL3 passing through both ends of the inclined outer peripheral surface 50c and a straight line SL4 passing through the tip of the inclined outer peripheral surface 50c in a direction perpendicular to the axis is preferably 30° or more, more preferably 45° or more, and even more preferably 60° or more, from the viewpoint of improving foam cutting at the end of foam ejection.

[0081] The nozzle 50 having the above configuration is configured to be attachable to the outer attachment cap 40. Specifically, the nozzle 50 is configured to be attached to the outer attachment cap 40 by fitting the inner nozzle base end 52 inside the nozzle holding portion 43 of the outer attachment cap 40 and fitting the small diameter holding portion 43b of the nozzle holding portion 43 between the inner nozzle base end 52 and the outer nozzle base end 53. Note that, in the present embodiment, the nozzle 50 has been described as being configured to be detachable from the outer attachment cap 40, but this is not limited thereto, and the nozzle 50 may be configured to be non-detachable from the outer attachment cap 40.

[0082] The nozzle 50 is formed by integral molding using materials such as polyethylene (PE), polypropylene (PP), and polyoxymethylene (POM). However, the configuration of the inner attachment cap 30 is not limited to this, and may be configured, for example, by integrating the nozzle tip portion 51, the inner nozzle base end portion 52, and the outer nozzle base end portion 53, which are molded as separate members, or by integrally molding the nozzle 50 and the outer attachment cap 40. Also, various other known materials and molding methods may be adopted.

[0083] The attachment cap 20 having the above-mentioned configuration has a foam flow path 23 that supplies foam from the mixing chamber 21 toward the nozzle 50, an outside air inlet path 24 that introduces air from the outside of the attachment cap 20 into the inside of the container body 10, and a check valve 25 that is provided in the outside air inlet path 24 and allows flow from the outside of the attachment cap 20 toward the inside of the outside air inlet path 24, and prevents flow from the inside of the outside air inlet path 24 toward the outside of the attachment cap 20.

[0084] As shown in Figure 6, in this embodiment, the space defined by the inner surface of the inner mesh retaining member 72, the inner surface of the large diameter cylindrical portion 32, the inner surface of the second upper wall portion 48b, the lower surface of the top portion 41, and the inner surface of the flow path forming portion 47 functions as the foam flow path 23.

[0085] 6, in this embodiment, the internal space of the ball accommodating portion 46, the space between the outer peripheral surface of the third upper wall portion 48c and the inner peripheral surface of the fourth upper wall portion 48d, the space defined by the outer peripheral surface of the large-diameter cylindrical portion 32, the upper surface of the annular bottom portion 35, and the inner peripheral surface of the second lower wall portion 36b, and the through-hole 35a function as the outside air introduction passage 24. That is, in this embodiment, the air outside the outer attachment cap 40 flows into the inside of the outer attachment cap 40 from the upper end of the ball accommodating portion 46 (the inlet of the outside air introduction passage 24), passes through the outside air introduction passage 24, and flows into the inside of the container body 10. Thus, in this embodiment, the nozzle outlet 51a and the inlet of the outside air introduction passage 24 (the upper end of the ball accommodating portion 46) are formed at different positions.

[0086] 6, in this embodiment, a ball valve 45 housed inside a ball housing portion 46 functions as a check valve 25. Note that, in this embodiment, the check valve 25 is described as a ball valve, but is not limited thereto, and various known valves such as a resin valve may be used.

[0087] In addition, the attachment cap 20 has a first switching mechanism 26 capable of switching between a connected state and a non-connected state between the outside air introduction path 24 and the inside of the container body 10, and a second switching mechanism 27 capable of switching between an ejection state in which foam can be ejected by the nozzle 50 and a non-ejection state in which foam cannot be ejected by the nozzle 50.

[0088] 7, in this embodiment, the third upper wall portion 48c and the first lower wall portion 36a function as the first switching mechanism 26. That is, in this embodiment, the first switching mechanism 26 is provided downstream of the outside air introduction path 24 from the check valve 25. Also, as shown in FIG. 7, in this embodiment, the first upper wall portion 48a and the large diameter cylindrical portion 32 function as the second switching mechanism 27.

[0089] The first switching mechanism 26 is configured to switch from a communicating state to a non-communicating state when the outer attachment cap 40 approaches the container body 10, and is configured to switch from a non-communicating state to a communicating state when the outer attachment cap 40 moves away from the container body 10. Specifically, the first switching mechanism 26 is configured to bring the outer peripheral surface of the third upper wall portion 48c and the inner peripheral surface of the first lower wall portion 36a into close contact with each other to close the outside air introduction passage 24 when the outer attachment cap 40 approaches the container body 10, and to bring about a communicating state when the outer peripheral surface of the third upper wall portion 48c and the inner peripheral surface of the first lower wall portion 36a move away from each other to open the outside air introduction passage 24.

[0090] The second switching mechanism 27 is configured to switch from the discharging state to the non-discharging state when the outer attachment cap 40 approaches the container body 10, and is configured to switch from the non-discharging state to the discharging state when the outer attachment cap 40 moves away from the container body 10. Specifically, the second switching mechanism 27 is configured to switch from the discharging state to the non-discharging state when the outer circumferential surface of the first upper wall portion 48a and the inner circumferential surface of the large diameter cylindrical portion 32 come into close contact with each other to close the foam flow path 23 when the outer attachment cap 40 approaches the container body 10, and switch from the discharging state to the discharging state when the outer circumferential surface of the first upper wall portion 48a and the inner circumferential surface of the large diameter cylindrical portion 32 move away from each other to open the foam flow path 23 when the outer attachment cap 40 moves away from the container body 10.

[0091] That is, in this embodiment, the first switching mechanism 26 is configured to switch from a connected state to a non-connected state in response to (in conjunction with) the switching operation by the second switching mechanism 27 from the ejection state to the non-ejection state, and is configured to switch from the non-connected state to a connected state in response to (in conjunction with) the switching operation by the second switching mechanism 27 from the non-ejection state to the ejection state.

[0092] In other words, the second switching mechanism 27 is configured to switch from the ejection state to the non-ejection state in response to (in conjunction with) the switching operation by the first switching mechanism 26 from the connected state to the non-connected state, and is configured to switch from the non-ejection state to the ejection state in response to (in conjunction with) the switching operation by the first switching mechanism 26 from the non-connected state to the connected state.

[0093] [Foam viscosity and foaming ratio] The viscosity of the liquid dispensed as foam using a foam dispenser container 1 having the above configuration (the viscosity of the liquid contained in the container body 10) is preferably 1.0 mPa·s or more and 20.0 mPa·s or less, more preferably 1.5 mPa·s or more and 15.0 mPa·s or less, and even more preferably 2.0 mPa·s or more and 10.0 mPa·s or less, from the viewpoint of generating and dispensing fine foam with uniform bubble diameters.

[0094] Furthermore, from the viewpoint of achieving both reducing the pressure required to eject the foam while ensuring the ejection distance of the foam, thereby increasing the amount of foam ejected, and ejecting foam of good quality (foam with uniform diameter and fine texture), it is more preferable that the foaming ratio of the foam ejected from the foam ejection container 1 is 10 times or more and 120 times or less, more preferably 11 times or more and 100 times or less, and even more preferably 12 times or more and 80 times or less.

[0095] [How to use the foam dispenser] Before use, the foam-discharging container 1 according to this embodiment is in a non-communicating and non-discharging state as shown in Fig. 7. That is, the outer attachment cap 40 is in a state close to the container body 10, the outer peripheral surface of the third upper wall portion 48c of the first switching mechanism 26 and the inner peripheral surface of the first lower wall portion 36a are in close contact with each other to block the outside air introduction passage 24, and the outer peripheral surface of the first upper wall portion 48a of the second switching mechanism 27 and the inner peripheral surface of the large-diameter cylindrical portion 32 are in close contact with each other to block the foam flow passage 23.

[0096] When using the foam dispensing container 1 according to this embodiment, first, the user separates the outer attachment cap 40 from the container body 10 to switch from the non-communicating state to the communicating state and from the non-dispensing state to the dispensing state, as shown in Fig. 6. That is, the outer peripheral surface of the third upper wall portion 48c of the first switching mechanism 26 is separated from the inner peripheral surface of the first lower wall portion 36a to open the outside air introduction path 24, and the outer peripheral surface of the first upper wall portion 48a is separated from the inner peripheral surface of the large diameter cylindrical portion 32 to open the foam flow path 23.

[0097] Next, the user holds the container body 10 in an upright state, points the nozzle 50 toward a predetermined discharge location, and presses the body 12 of the container body 10 to squeeze and deform it. By squeezing and deforming the body 12 of the container body 10 in this manner, the internal pressure of the container body 10 increases, so that the check valve 25 built into the outer mounting cap 40 comes into close contact with the upper end of the ball receiving portion 46, and the outside air introduction passage 24 is blocked. In addition, as the internal pressure of the container body 10 further increases, the ball valve 38 built into the inner mounting cap 30 moves in a direction away from the valve seat portion 34, and the liquid flow path 22 and the mixing chamber 21 are in communication with each other. As a result, the liquid contained in the container body 10 flows into the mixing chamber 21 through the liquid flow path 22. At the same time, the air (gas) in the container body 10 flows into the mixing chamber 21 through the air introduction hole 39 due to the increase in the internal pressure of the container body 10.

[0098] This causes the liquid and gas to mix in the mixing chamber 21, and together with the mesh function of the mesh member formed at the outlet of the mixing chamber 21, fine bubbles are generated. The generated foam is then discharged from the nozzle 50 via the foam flow path 23 formed in the inner attachment cap 30 and the outer attachment cap 40. By the above squeezing operation, foam can be discharged from the foam discharge container 1 according to this embodiment toward a predetermined discharge location.

[0099] In particular, in the foam-ejecting container 1 of this embodiment, the diameter of the outlet 51a is formed smaller than the diameter of the inlet of the reduced flow path section 54a, and the diameter of the outlet 51a is 1.7 mm or more and 2.5 mm or less, so that the foam ejection distance can be ensured while reducing the pressure force required to eject the foam and increasing the amount of foam ejected.

[0100] After the predetermined amount of foam has been discharged by the above squeezing operation, the user stops pressing the container body 10 (squeezing operation) and removes the external force on the container body 10. As a result, the container body 10 returns to its original shape due to its own elasticity, and the inside of the container body 10 becomes negative pressure. When the inside of the container body 10 becomes negative pressure in this way, the check valve 25 built into the outer mounting cap 40 moves in a direction away from the upper end of the ball receiving portion 46, and the outside air introduction path 24 is opened. As a result, outside air flows into the inside of the container body 10 through the outside air introduction path 24. In parallel with this, the ball valve 38 built into the inner mounting cap 30 comes into close contact with the valve seat portion 34, and the liquid flow path 22 and the mixing chamber 21 become non-communicative. As a result, the backflow of the liquid in the mixing chamber 21 is prevented.

[0101] After foam is dispensed by the foam dispenser container 1, the first switching mechanism 26 may or may not switch from a connected state to a non-connected state, and the second switching mechanism 27 may or may not switch from a dispenser state to a non-dispensing state.

[0102] [Advantages of the foam dispensing container according to this embodiment] Thus, the foam-dispensing container 1 of this embodiment is a foam-dispensing container 1 equipped with a container body 10 capable of containing liquid, and is equipped with a mixing chamber 21 that mixes liquid and air to generate foam, and a nozzle 50 that can discharge the foam generated in the mixing chamber 21, the nozzle 50 has an outlet 51a that can discharge the foam generated in the mixing chamber 21, and a nozzle flow path 54 that causes the foam to flow toward the outlet 51a, the nozzle flow path 54 has a reduced flow path section 54a whose diameter reduces toward the outlet 51a, the diameter of the outlet 51a is formed smaller than the diameter of the inlet of the reduced flow path section 54a, and the diameter of the outlet 51a is 1.7 mm or more and 2.5 mm or less.

[0103] According to the foam discharge container 1 having such a configuration, the diameter of the discharge port 51a is formed smaller than the diameter of the inlet of the reduced flow path section 54a, and the diameter of the discharge port 51a is 2.5 mm or less, so that the foam discharge distance can be secured. Also, since the diameter of the discharge port 51a is 1.7 mm or more, the pressure force required for discharging the foam can be reduced, and the amount of foam discharged can be increased. That is, according to the foam discharge container 1 having the above configuration, the diameter of the discharge port 51a is formed smaller than the diameter of the inlet of the reduced flow path section 54a, and the diameter of the discharge port 51a is 1.7 mm or more and 2.5 mm or less, so that the pressure force required for discharging the foam can be reduced while securing the foam discharge distance, and the amount of foam discharged can be increased. Also, according to the foam discharge container 1 having the above configuration, when the diameter of the discharge port 51a is 1.8 mm or more, the foam is less likely to break, so that good foam quality can be obtained, and the volume of the foam discharged can be increased.

[0104] In the foam-dispensing container 1 according to this embodiment, the container body 10 has a bottom 11, a flexible body 12, and a mouth 13, and the body 12 has an elliptical cylindrical shape with a long axis and a short axis in horizontal cross section. The foam-dispensing container 1 having such a configuration has the advantage that it is possible to dispense foam over a long distance with little distortion.

[0105] Furthermore, in the foam-dispensing container 1 according to this embodiment, the body 12 has a constricted portion 12a formed in the center in the direction from the bottom 11 to the mouth 13. The foam-dispensing container 1 having such a configuration has the advantage that the container body 10 is easy to grip, and the gripping position can be guided to the constricted portion 12a.

[0106] Moreover, in the foam-dispensing container 1 according to this embodiment, the constricted portions 12a are formed at both ends on the long axis side of the body portion 12. Foam-dispensing container 1 having such a configuration has the advantage that it is less susceptible to the resistance of the constricted portions 12a when deforming by squeezing, and it is possible to dispense foam over a long distance with a small squeezing force.

[0107] Furthermore, in the foam dispensing container 1 according to this embodiment, the container body 10 has a raised bottom structure in which only the bottom 11 comes into contact with the placement surface when placed on the placement surface. The foam dispensing container 1 having such a configuration has the advantage that the deformation rate during squeeze deformation (i.e., the rate of reduction in the volume of the container body 10) can be increased.

[0108] [Variations] The foam dispensing container according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope that does not deviate from the technical concept of the present invention.

[0109] For example, in the above-described embodiment, the inner surface of the nozzle 50 has been described as having an inclined inner surface 50a and a horizontal inner surface 50b, but this is not limited thereto, and the nozzle 50 may be configured to have only the inclined inner surface 50a.

[0110] In addition, in the above-described embodiment, the outer peripheral surface of the nozzle 50 has been described as having an inclined outer peripheral surface 50c and a horizontal outer peripheral surface 50d, but this is not limited to this, and for example, the nozzle 50 may be configured to have only one of the inclined outer peripheral surface 50c and the horizontal outer peripheral surface 50d.

[0111] Furthermore, in the above-described embodiment, the body 12 has been described as having an elliptical cylindrical cross-section having a major axis and a minor axis in horizontal cross-section, but is not limited to this and may have other shapes, such as a perfectly circular cross-section.

[0112] In the above embodiment, the body portion 12 has been described as having the constricted portion 12a, but this is not limiting and the body portion 12 may not have the constricted portion 12a. Furthermore, the body portion 12 has been described as having the constricted portion 12a formed at both ends on the long axis side, but this is not limiting and the body portion 12 may have the constricted portion 12a formed at both ends on the short axis side, or may be formed over the entire circumferential area.

[0113] Furthermore, in the above-described embodiment, the container body 10 has been described as having a raised bottom structure in which only the bottom 11 comes into contact with the supporting surface when the container body 10 is placed on the supporting surface, but this is not limited to this, and the container body 10 may be configured not to have a raised bottom structure.

[0114] In addition, the container body is not limited to the container body 10 according to the above embodiment, and various configurations can be adopted as long as the mounting cap can be attached and liquid can be contained. For example, the container body is not limited to a squeeze foamer container capable of a squeezing operation, and various configurations such as a trigger-type foamer container with a built-in pump can be adopted. In addition, the container body is not limited to a self-supporting configuration, and may be a non-self-supporting configuration (for example, a configuration formed in a hemispherical shape with the bottom facing downward, a tube-shaped configuration, etc.). Furthermore, the container body may be a container equipped with a bellows-type volume variable part that can be elastically deformed. In addition, the container body may be a pressurized container equipped with an air supply part capable of supplying compressed air from the outside of the container body to the inside, such as an air pump.

[0115] It is apparent from the claims that the above-mentioned modifications are included within the scope of the present invention. EXAMPLES

[0116] The present invention will be described in detail below with reference to examples, but the object of the present invention is not limited thereto.

[0117] Based on the foam-discharging container 1 of this embodiment, foam-discharging containers of Examples 1 to 4 and Comparative Examples 1 to 4 were produced, and the foam discharging distance, pressing force of the container body 10, foam quality, and foam discharge amount were compared for each foam-discharging container.

[0118] [Preparation of Examples 1 to 4 and Comparative Examples 1 to 4] The foam-discharging containers according to Examples 1 to 4 and Comparative Examples 1 to 4 each have a diameter of the discharge port 51a as shown in Table 1, a diameter of the inlet of the reduced flow path section 54a of 6.6 mm, a length L1 of 1.0 mm, and an angle θ1 of 60°. The foam-discharging containers according to Examples 1 to 4 and Comparative Examples 1 to 4 have the same configuration except for the diameter of the discharge port 51a.

[0119] [Measurement conditions for foam discharge distance, pressing force of container body 10, and foam quality] (1) With 300 mL of liquid contained in the container body 10, the body 12 was pressed from both ends of the short axis direction of the body 12 toward the center at 25 mm / sec, and the foam ejection distance, the pressing force of the container body 10, and the foam quality were measured when the body 12 was squeezed and deformed by 25 mm. (2) The measurement in (1) above was carried out three times, and the average values ​​of the foam ejection distance and the pressing force of the container body 10, as well as the average state of the foam quality, were calculated.

[0120] [Measurement conditions for foam discharge volume] (1) With 300 mL of liquid contained in the container body 10, the amount of foam ejected was measured when the body 12 was pressed from both ends in the short axis direction of the body 12 toward the center at 25 mm / sec and 40 N. (2) The measurement in (1) above was carried out three times, and the average amount of foam discharged was calculated.

[0121] In addition, when measuring the above foam ejection distance, the pressing force of the container body 10, the foam quality, and the amount of foam ejected, a cleaning agent with a viscosity of 10 mPa·s (product name: Biore U The Body Foam Type Purely Soap Scent, manufactured by Kao Corporation) was used as the liquid.

[0122] [Evaluation criteria for foam discharge distance] A: It flies up to 15cm without losing momentum B: It flies up to 15cm but has no momentum C: The bubbles do not reach 15cm or do not fly away

[0123] [Overall evaluation criteria] For foam-discharging containers with a foam discharge distance rating of A, a pressing force of the container body 10 of less than 105 N, and a foam discharge amount of 0.5 g or more, it was determined that the foam discharge amount can be increased by reducing the pressure required to discharge foam while maintaining the foam discharge distance, and the overall rating was good. Furthermore, for foam-discharging containers with a foam discharge amount of 0.7 g or more and good foam quality, the overall rating was excellent. On the other hand, for foam-discharging containers with a foam discharge distance rating of B or C, a pressing force of the container body 10 of 105 N or more, or a foam discharge amount of less than 0.5 g, the overall rating was bad.

[0124] [Table 1]

[0125] As shown in Table 1, it was found that the foam discharging containers according to Examples 1 to 4, in which the diameter of the discharge port 51a is 1.7 mm or more and 2.5 mm or less, can reduce the pressure required to discharge the foam while ensuring the foam discharge distance, and increase the amount of foam discharged. In particular, it was found that the foam discharging containers according to Examples 2 to 4, in which the diameter of the discharge port 51a is 1.8 mm or more and 2.5 mm or less, can improve the foam quality and further increase the amount of foam discharged.

[0126] On the other hand, under the same conditions, it was found that for the foam-discharging container according to Comparative Example 1, in which the diameter of the discharge port 51a was less than 1.7 mm, the amount of foam discharged was small and the discharged foam lacked momentum due to the large pressing force of the container body 10 (i.e., the large pressure force required to discharge the foam). Also, under the same conditions, it was found that for the foam-discharging containers according to Comparative Examples 2 to 4, in which the diameter of the discharge port 51a was greater than 2.5 mm, the diameter of the discharge port 51a was large, so the discharged foam lacked momentum and it was not possible to ensure the discharge distance of the foam. [Explanation of symbols]

[0127] 1: Foam discharge container 10: Container body 11: Bottom 12: Torso 12a: Neck 12b: Upper part 12c: bottom 13: Mouth 13a: Large diameter opening 13b: Small diameter opening 20: Mounting cap 21:Mixing room 22: Liquid flow path 23:Bubble channel 24: Outside air intake 25: Check valve 26: First switching mechanism 27: Second switching mechanism 30: Inner cap 31: Cylindrical part 31a:Groove 31b: Rib 32: Large diameter cylindrical section 33: Small diameter cylindrical section 34: Valve seat 35: Circular bottom 35a: Through hole 36: Lower wall part 36a: First lower wall part 36b: Second lower wall part 36c: 3rd lower wall part 37: Exterior wall 37a: Small diameter outer wall part 37b: Large diameter outer wall 38: Ball valve 39: Air inlet 40: Outer cap 41:Top 42: Peripheral wall part 43: Nozzle holder 43a: Large diameter holding part 43b: Small diameter holding part 44: Containment room 44a: Containment wall 44b: Bottom of containment area 45: Ball valve 46: Ball holder 46a: Valve seat 47: Flow path forming section 48: Upper wall 48a: First upper wall part 48b: Second upper wall portion 48c: Third upper wall part 48d: 4th upper wall part 50: Nozzle 50a: Inclined inner surface 50b: Horizontal inner surface 50c: Inclined outer surface 50d: Horizontal outer peripheral surface 51: Nozzle tip 51a:Discharge port 52: Inner nozzle base end 52a:Inlet 53: Outer nozzle base end 54: Nozzle flow path 54a: Reduced flow passage section 60:Dip tube 70: Mesh retaining member 71: Outer mesh retaining member 72: Inner mesh retaining member

Claims

1. A foam dispensing container having a container body capable of holding liquid, A mixing chamber for mixing liquid and air to generate foam, A nozzle capable of discharging foam generated in the aforementioned mixing chamber Equipped with, The nozzle has a discharge port from which foam generated in the mixing chamber can be discharged, and a nozzle channel for causing the foam to flow toward the discharge port. The nozzle flow path has a narrowing flow path section whose diameter decreases toward the discharge port. The diameter of the discharge port is formed to be smaller than the diameter of the inlet of the reduced flow path section. The diameter of the discharge port is 1.7 mm or more and 2.5 mm or less. Foam dispensing container.

2. The inner circumferential surface of the nozzle is From the inlet of the reduced flow channel towards the outlet, the inclined inner surface of the nozzle is inclined toward the radial center, A horizontal inner surface extending along the axial direction of the nozzle from the end of the inclined inner surface on the discharge side toward the discharge port, It has, The length of the horizontal inner surface along the axial direction of the nozzle is 0.5 mm or more and 2.0 mm or less. The foam dispensing container according to claim 1.

3. The inner circumferential surface of the nozzle has an inclined inner circumferential surface that slopes toward the radial center of the nozzle from the inlet of the reduced flow path toward the discharge port. In a cross-section along the axis of the nozzle, the angle between a straight line passing through both ends of the inclined inner circumferential surface and a straight line extending along the axis of the nozzle is 50° or more and 70° or less. A foam dispensing container according to claim 1 or 2.

4. The outer circumferential surface of the nozzle has an inclined outer circumferential surface that is inclined toward the foam discharge direction and toward the radial center of the nozzle. In a cross-section along the axis of the nozzle, the angle between a straight line passing through both ends of the inclined outer surface and a straight line passing through the tip of the inclined outer surface perpendicular to the axis is 30° or more. A foam dispensing container according to claim 1 or 2.

5. The foaming ratio of the foam discharged from the nozzle is between 10 and 120 times. A foam dispensing container according to claim 1 or 2.

6. It is a squeeze former container. A foam dispensing container according to claim 1 or 2.

7. The container body has a bottom, a flexible body, and a mouth. The body portion has an elliptical cylindrical cross-section with a major axis and a minor axis in its horizontal cross-section. A foam dispensing container according to claim 1 or 2.

8. The body portion has a constricted portion formed in the center in the direction from the bottom portion to the mouth portion. The foam dispensing container according to claim 7.

9. The aforementioned constricted portion is formed at both ends on the long axis side of the body portion. The foam dispensing container according to claim 8.

10. The container body has a raised bottom structure such that when placed on the mounting surface, only the bottom part contacts the mounting surface. The foam dispensing container according to claim 7.

11. A mounting cap configured to be attached to a container body capable of holding liquid, A mixing chamber for mixing liquid and air to generate foam, A nozzle capable of discharging foam generated in the aforementioned mixing chamber Equipped with, The nozzle has a discharge port from which foam generated in the mixing chamber can be discharged, and a nozzle channel for causing the foam to flow toward the discharge port. The nozzle flow path has a narrowing flow path section whose diameter decreases toward the discharge port. The diameter of the discharge port is formed to be smaller than the diameter of the inlet of the reduced flow path section. The diameter of the discharge port is 1.7 mm or more and 2.5 mm or less. Attachment cap.

12. A nozzle capable of discharging foam generated by mixing a liquid and a gas, The system has a discharge port from which the generated foam can be discharged, and a nozzle channel for causing the foam to flow toward the discharge port. The nozzle flow path has a narrowing flow path section whose diameter decreases toward the discharge port. The diameter of the discharge port is formed to be smaller than the diameter of the inlet of the reduced flow path section. The diameter of the discharge port is 1.7 mm or more and 2.5 mm or less. nozzle.

Images