Bubble generation method

Abstract

The present invention provides a bubble generation method that is capable of generating high-quality bubbles for cleansing. This bubble generation method comprises a closing step for closing a drain port 11 of a shampoo bowl 10, an application step for applying a washing agent to the inner surface of the shampoo bowl 10, and a water discharge step for, after the closing step and the application step, bringing a water discharge surface 23 of a shower head 13 directly above the applied washing agent or in the vicinity of the washing agent on a bottom portion 14, and discharging, from the shower head 13, rinse water that is hot water consisting of multiphase flows due to the use of a multiphase flow generation device, whereby high-quality fine bubbles are generated in the shampoo bowl 10.

Description

Bubble generation method

[0001] The present disclosure relates to a foam generating method for use in hair treatments.

[0002] Conventionally, treatment tables installed in hair salons and other beauty salons have shampoo bowls. Treatments such as shampooing, scalp massage, hair coloring, permanent waving, or hair treatment are performed in the shampoo bowl. For example, shampooing and scalp massage not only wash away dirt from the pores of the hair and scalp, but may also simultaneously massage the scalp. Furthermore, as described in Patent Document 1 below, in hair coloring, a chemical is applied to the hair, and after an appropriate time has passed, the chemical is washed off with a shampoo or the like (hereinafter, the hair and scalp will be collectively referred to as the "head," and washing and massaging the head will be referred to as "cleansing").

[0003] Japanese Patent Application Laid-Open No. 2021-011436

[0004] For proper cleansing, it is essential to generate fine bubbles. The finer the bubbles, the larger the contact area of ​​the bubbles with the hair, resulting in a high cleansing effect. The time required to generate bubbles and the quality of the bubbles are affected by the technique of the practitioner. Therefore, regardless of the practitioner's skill, it is necessary to generate high-quality bubbles for proper cleansing.

[0005] The present disclosure has been proposed in view of the above-described circumstances, and aims to provide a foam generating method capable of generating high-quality foam for cleansing.

[0006] In order to achieve the above object, the foam generating method of the present disclosure is characterized in that it includes a closing step of closing the drain outlet of the shampoo bowl, an application step of applying a detergent to the inner surface of the shampoo bowl, and a water discharge step of bringing the water discharge surface of the shower head close to the detergent and discharging cleaning water, which is hot and cold water that has been converted into a multiphase flow using a multiphase flow generating device, from the shower head, and in that the water discharge step includes a proximity step of continuing to bring the water discharge surface close to the water surface in accordance with the rise in the water level of the cleaning water accumulated in the shampoo bowl, thereby generating foam in the shampoo bowl for cleansing the head of the person being treated.

[0007] The foam generating method according to the present disclosure is characterized in that, by going through a plugging step of closing the drain outlet of the shampoo bowl, an application step of applying a detergent to the inner surface of the shampoo bowl, and a water discharge step of bringing the water discharge surface of the shower head close to the detergent applied to the inner surface of the shampoo bowl after the plugging step and the application step, and discharging cleaning water, which is hot and cold water that has been made into a multiphase flow using a multiphase flow generating device, from the shower head and directing it at the detergent applied to the inner surface, foam for cleansing the head of the person to be treated is continuously generated in the shampoo bowl from the detergent applied to the inner surface.

[0008] The foam generating method according to the present disclosure is characterized in that the foam generated in the shampoo bowl is layered so thickly that it completely covers the surface of the cleaning water accumulated in the shampoo bowl and makes the water surface invisible.

[0009] The foam generating method according to the present disclosure is characterized by including a swirling step of continuously swirling the shower head inside the shampoo bowl after applying the cleaning water to the inner surface to which the cleaning agent has been applied and the vicinity thereof.

[0010] The foam generating method according to the present disclosure is characterized in that the water discharge procedure includes a proximity procedure in which the water discharge surface is kept close to the water surface in accordance with the rise in the water level of the cleaning water accumulated in the shampoo bowl.

[0011] The foam generating method according to the present disclosure is characterized in that the water discharge step includes a foaming step in which foam water generated through a foaming member possessed by the shower head is converted into hot water.

[0012] The foam generating method according to the present disclosure generates cleansing foam in the shampoo bowl by performing a closing step of closing the drain outlet of the shampoo bowl, an application step of applying a detergent to the inner surface of the shampoo bowl, and a water discharge step of bringing the shower head's water discharge surface close to the detergent and discharging wash water (hot and cold water) that has been converted into a multiphase flow using a multiphase flow generator from the shower head after the closing step and the application step. By performing each step, wash water with dissolved detergent collects in the shampoo bowl, and when the wash water is discharged from the shower head, it lathers, generating a large amount of fine foam. Therefore, regardless of the user's skill, high-quality foam for cleansing can be generated.

[0013] FIG. 1 is a perspective view of a hairdressing device in which a foam generation method according to an embodiment of the present disclosure is implemented. FIG. 2 is a plan view of a shampoo bowl in which a foam generation method according to an embodiment of the present disclosure is implemented. FIG. 3 is a top view of a first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 4 is a perspective view of the first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 5 is a front view of the first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 6 is a side view of the first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 7 is a cross-section VII-VII of FIG. 5, which is a first cross-sectional side view of the first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 8 is a cross-section VIII-VIII of FIG. 5, which is a second cross-sectional side view of the first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 9 is a bottom view of the first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 10 is an explanatory diagram illustrating a portion of a method of using the first embodiment of a shower head used in a foam generation method according to an embodiment of the present disclosure. FIG. 11 is a top view of a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure. FIG. 12 is a perspective view of a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure. FIG. 13 is a front view of a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure. FIG. 14 is a side view of a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure. FIG. 15 is a cross-sectional view taken along line XV-XV of FIG. 13, which is a first cross-sectional side view of a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure. FIG. 16 is a cross-sectional view taken along line XVI-XVI of FIG. 13, which is a second cross-sectional side view of a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure. FIG. 17 is a bottom view of a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure. FIG. 18 is an explanatory diagram illustrating a portion of a method of using a second embodiment of a showerhead for use in a foam generation method according to an embodiment of the present disclosure.

[0014] The foam generating method according to the present disclosure includes a water discharge step in which, after spraying cleansing water onto the inner surface where the cleanser has been applied and its vicinity, a swirling step in which the shower head is rotated inside the shampoo bowl. Through this swirling step, the entire cleansing water containing the cleansing agent in the shampoo bowl is further stirred by the cleansing water discharged from the shower head, generating foam. Therefore, regardless of the user's skill level, high-quality foam can be generated for cleansing.

[0015] The foam generating method according to the present disclosure includes a water discharge step in which the water discharge surface is kept close to the water surface as the water level in the shampoo bowl rises. Even as the water level rises, the water continues to be discharged close to the water surface, resulting in more foam. Therefore, regardless of the user's skill, high-quality foam can be generated for cleansing.

[0016] The foam generating method according to the present disclosure includes a foaming step in which foam water generated by a foaming element of a shower head is used as cleansing water during the water discharge step. By using the foam water as cleansing water, finer bubbles are generated. Therefore, regardless of the skill of the user, high-quality foam can be generated for cleansing.

[0017] The foam generating method according to the present disclosure allows the foam generated in the shampoo bowl to be layered so thickly that it completely covers the surface of the wash water in the shampoo bowl and makes it impossible to see the water surface, thereby generating a large amount of foam for cleansing.

[0018] The following describes a foam generation method according to an embodiment of the present disclosure and a beauty and hairdressing device 1 used in the method. Fig. 1 shows a beauty and hairdressing device 1 for carrying out the foam generation method according to the present embodiment. Fig. 2 shows a shampoo bowl 10 used in the beauty and hairdressing device 1.

[0019] As shown in Figure 1, the hairdressing and beauty device 1 has a treatment table 2 used by a person to be treated (not shown), a shampoo bowl 10 located behind the treatment table 2 and on which the head of the person to be treated is placed, a shower head 13 provided on the shampoo bowl 10, and a multiphase flow generating device (not shown) that generates wash water by adding a multiphase flow to the hot and cold water discharged from the shower head 13.

[0020] The treatment table 2 has a seat portion 3 on which the treatment recipient lies and a lifting unit 4 that supports the seat portion 3 from below. The seat portion 3 has a seat portion 5 on which the treatment recipient sits, a leg rest portion 6 connected to the front of the seat portion 5 and on which the treatment recipient's legs are placed, a backrest portion 7 connected to the rear of the seat portion 5 and on which the treatment recipient's upper body is placed, and armrest portions 8 located on the left and right sides of the seat portion 5 and on which the treatment recipient's arms are placed. The treatment table 2 is configured such that the seat portion 3 rises and falls as the lifting unit 4 operates to expand and contract up and down, and the backrest portion 7 tilts or rises, changing the angle of the seat portion 3. When the backrest portion 7 tilts, the seat portion 3 becomes horizontal or approximately horizontal. The posture of the treatment table 2 can be changed arbitrarily by operation by the therapist (not shown), or it can automatically change to a predetermined posture.

[0021] The shampoo bowl 10 is for the person to lie face up on the seat 3 and place their head there to receive a treatment. The therapist stands behind or to the side of the shampoo bowl 10 (or sits on a stool) and performs a treatment on the person's head and hair. Treatments include, for example, shampooing, scalp massage, hair coloring, permanent waving, hair treatment, or eye makeup. The shampoo bowl 10 is placed on a base 9.

[0022] The multiphase flow generator is connected to one of the hot water flow paths because it converts hot water discharged from the shower head 13 into a multiphase flow by incorporating air into the hot water. For example, it may be built into a hot water supply unit (not shown) that delivers hot water or into the base 9, or it may be connected to the hot water supply unit or the base 9 via piping from the outside. In addition, a switch (not shown) that selects whether to operate the multiphase flow generator is installed near the base 9.

[0023] As shown in Figure 2, shampoo bowl 10 is composed of a bottom 14 and a peripheral wall 15, and is generally hemispherical. In shampoo bowl 10, a drain outlet 11 is formed in bottom 14, and a hot and cold water stop valve 12, a shower head 13 for discharging hot and cold water, etc. are installed on the inner surface of peripheral wall 15. A portion of peripheral wall 15 facing seat 3 is recessed, and a head support device 16 is attached. Head support device 16 is freely attachable and detachable. The neck and head of the person to be treated are placed on head support device 16.

[0024] Next, a specific configuration of the showerhead 13 will be described in detail with reference to the drawings as a first embodiment of the showerhead 13. The appearance and cross section of the showerhead 13 are shown in Figures 3 to 9.

[0025] 3 to 9, the shower head 13 has a hose connection part 20 to which a shower hose (not shown) is connected, a head main body part 21 connected downstream of the hose connection part 20, and a water discharge part 22 formed downstream of the head main body part 21. The hot and cold water flowing through the shower hose flows through the hose connection part 20 and the head main body part 21 in order, and is discharged from the water discharge surface 23 of the water discharge part 22.

[0026] The head main body 21 is generally cylindrical, and inside the head main body 21 is a flow path switching unit 28 that switches the flow path of hot and cold water discharged from the water discharge unit 22, and two inflow chambers into which the hot and cold water whose flow path has been switched by the flow path switching unit 28 flows. The flow path switching unit 28 switches the flow path of the hot and cold water by moving a valve. The flow path switching unit 28 has a switch 29 for switching the flow path, and the switch 29 protrudes from the flow path switching unit 28 to the outside of the head main body 21. One of the inflow chambers is a cylindrical central flow path 30 located at the center of the head main body 21, and the other is a circular peripheral flow path 31 located on the outer periphery of the central flow path 30. A foaming member 32 is attached to the central flow path 30. The hot and cold water that passes through the foaming member 32 contains a large amount of air bubbles.

[0027] The water discharge surface 23 formed at the tip of the water discharge portion 22 is circular and has multiple water discharge holes 24 formed therein. The water discharge surface 23 has a circular central water discharge surface 25 at the center of the water discharge surface 23 and a ring-shaped peripheral water discharge surface 26 at the periphery of the central water discharge surface 25. The central water discharge surface 25 is located downstream of the central flow path 30 of the head main body portion 21 and is formed by the downstream end face of the foaming member 32. The peripheral water discharge surface 26 is located downstream of the peripheral flow path 31 of the head main body portion 21.

[0028] At the front end of the water spouting section 22, the peripheral edge 27 of the water spouting surface 23 protrudes in the water spouting direction more than the outer peripheral water spouting surface 26. Therefore, the outer peripheral water spouting surface 26 is recessed on the opposite side to the water spouting direction. The central water spouting surface 25 does not protrude from, nor is it recessed into, the peripheral edge 27. Therefore, the central water spouting surface 25, like the peripheral edge 27, protrudes in the water spouting direction more than the outer peripheral water spouting surface 26. With this configuration, an emulsification promotion space 33 is formed in front of the water spouting surface 23 as a space formed by the water spouting surface 23 and the peripheral edge 27.

[0029] Multiple protrusions 34 are formed on the outer surface of the showerhead 13, on the outer periphery of the water spouting portion 22. The protrusions 34 are arranged at equal or approximately equal intervals along the periphery of the water spouting portion 22. The protrusions 34 gradually rise outward from the leading edge 35 of the periphery 27 in the direction opposite the water spouting direction. The apex 37, where the protrusions 34 rise, is a stripe extending toward the periphery of the water spouting portion 22. The apex 37 is located 0.5 to 1.5 millimeters away from the leading edge 35 of the periphery 27 in the direction opposite the water spouting direction (see spacing 38 in Figure 6). A groove 39 is formed in the apex 37. The groove 39 is recessed from the outside toward the inside and extends toward the periphery of the water spouting portion 22. One end of the groove 39 is open, and the other end is closed.

[0030] The beauty and hairdressing device 1 is configured as described above. Next, an emulsification method using the beauty and hairdressing device 1 will be described with reference to the drawings, along with the operation and effect of the beauty and hairdressing device 1. FIG. 10 shows how the recipient holds the shower head 13 during the emulsification method. After applying a treatment such as hair coloring, the practitioner uses the emulsification method to wash away the chemicals adhering to the recipient's hair. The hot and cold water used in the emulsification method may be either that discharged from the central water discharge surface 25 or that discharged from the outer peripheral flow path 31 (hereinafter, hot and cold water discharged from the central water discharge surface 25 will be referred to as "foam water," hot and cold water discharged from the outer peripheral water discharge surface 26 will be referred to as "spray water," and either foam water or spray water will be referred to as "hot and cold water").

[0031] As shown in FIG. 10 , the practitioner first grasps the exterior of the shower head 13 so as to cover the outer periphery of the water discharger 22 from the head body 21 side. For example, the practitioner places the first joints of the fingers 17 or their vicinity against the apexes 37 of the protrusions 34, causing the fingers 17 to protrude in the direction of water discharge from the water discharge surface 23. Therefore, the practitioner can use their fingertips while still gripping the shower head 13, allowing them to perform treatment with the fingers 17 gripping the shower head 13. Furthermore, multiple fingers 17 can be caught on the protrusions 34, allowing the shower head 13 to be held at equal intervals, preventing slippage. In particular, the apexes 37 of the protrusions 34 are horizontally elongated along the outer periphery of the water discharger 22 and gently rise from the tip edge 35 of the peripheral edge 27 (see FIG. 4 ), making it easy for the first joints of the fingers 17 to catch on them.

[0032] In this position, fingers 17 protruding in the water discharge direction are placed against the hair of the user with a gap between water discharge surface 23 and the user's hair, bringing water discharge surface 23 close to the hair. This leaves an appropriate gap between water discharge surface 23 and the hair, naturally forming an emulsification-promoting space 33 between the hair and water discharge surface 23. Here, emulsification-promoting space 33 is not just the space formed by water discharge surface 23 and peripheral edge 27, but also includes this space and is the space in front of water discharge surface 23 between the hair.

[0033] During these steps, the stop valve 12 is turned as needed to discharge hot and cold water. In addition, before and after discharging hot and cold water, the multiphase flow generating device is operated. When the multiphase flow generating device is operated, the hot and cold water that has become a multiphase flow due to the inclusion of air is pressurized by the pump of the multiphase flow generating device and is forcefully discharged from the discharge surface 23 (hereinafter, the multiphase hot and cold water will be referred to as "wash water").

[0034] The cleansing water discharged from the water discharge surface 23 hits the recipient's hair and bounces back towards the water discharge surface 23. The cleansing water swirls between the water discharge surface 23 and the hair, entraining air, and is momentarily received by the water discharge surface 23 and retained in the emulsification promotion space 33. When the oil from the chemicals attached to the hair mixes with the cleansing water, the interface is activated and emulsification occurs. As the cleansing water retains in the emulsification promotion space 33 while hitting the hair, appropriate emulsification can be easily achieved in a short time. Furthermore, when the water discharge surface 23 approaches the hair, the cleansing water reaches the densely packed roots of the hair, allowing emulsification to occur all the way to the roots. Therefore, emulsification can be achieved evenly throughout the entire scalp or within the desired range.

[0035] Next, a foam generation method using the beauty treatment device 1 will be described with reference to Fig. 2. The foam generation method includes at least a plugging step, an application step, and a water discharge step. The water discharge step may include a swirling step, an approaching step, and a foaming step as necessary.

[0036] In Figure 2, in the plugging step, a plug is attached to the drain outlet 11 to close the drain outlet 11. This makes the shampoo bowl 10 ready to be filled with hot water and foam. In the application step, a detergent such as shampoo is applied to the inner surface of the shampoo bowl 10. The amount of detergent applied is arbitrary, but if the detergent container is a pump bottle, for example, it is the amount that is dispensed by pushing the nozzle two or three times. The position where the detergent is applied is also arbitrary, but for example, it may be near the drain outlet 11 on the bottom 14. The plugging step and the application step may be performed in reverse order.

[0037] After the closing procedure and the application procedure, in the water discharge procedure, the water discharge surface 23 of the shower head 13 is brought close to the bottom 14 of the shampoo bowl 10, directly above the applied detergent, or in the vicinity of the detergent. The switch 29 of the shower head 13 is operated to select water spray or foaming water. When the multiphase flow generator is operated and the stop valve 12 is operated (or the stop valve 12 is operated and the multiphase flow generator is operated), wash water is discharged from the shower head 13. When the wash water hits the detergent or its vicinity inside the shampoo bowl 10, the detergent dissolves and mixes with the wash water, gradually foaming and generating fine bubbles. In the swirling procedure, after the wash water hits the detergent or its vicinity, the shower head 13 is swirled inside the shampoo bowl 10 while the wash water is being discharged. The wash water and detergent mix together, and further aeration is incorporated and agitated, gradually increasing the amount of foam. As the level of the wash water accumulated in the shampoo bowl 10 rises, the water discharge surface 23 is kept close to the water surface. The distance between the water surface and the water discharge surface 23 is about several millimeters to several centimeters.

[0038] In this way, a large amount of cleansing foam is generated in the shampoo bowl 10. The detergent foams further as it is stirred by the wash water, and further foams as the wash water continues to hit it close to the water surface. In particular, when wash water with foam water is used, the foaming step generates even finer foam.

[0039] As described above, the foam generating method allows the generation of high-quality foam for cleansing, regardless of the practitioner's skill level. The high-quality foam completely covers the surface of the wash water in the shampoo bowl 10, forming a thick layer that makes the water surface invisible. Furthermore, even if the practitioner scoops up the foam with their hand and tilts it, the foam does not spill from their hand and remains for some time.

[0040] In other embodiments of the present disclosure, the shower head does not have any protrusions on its outer surface. In another embodiment, the central water spouting surface is recessed on the side opposite the water spouting direction, similar to the peripheral water spouting surface. In another embodiment, the shape, number, arrangement, etc. of the protrusions are optional. In another embodiment, the configuration of the beauty device is optional. In another embodiment, the rotation step is not performed. In another embodiment, the proximity step is not performed. In another embodiment, the foaming step is not performed.

[0041] <Additional Notes> The beauty and hairdressing device 1 described above may also be realized as a hair washing device described below, as long as it has at least the shower head 13 and the multiphase flow generating device.

[0042] A hair washing device comprising: a multiphase flow generating device that generates wash water by converting hot and cold water for washing hair into a multiphase flow; and a shower head that discharges the wash water, wherein the water discharge surface of the shower head is recessed on the side opposite to the water discharge direction.

[0043] A hair washing device characterized in that the peripheral edge of the water discharge surface protrudes in the water discharge direction beyond the water discharge surface, thereby providing an emulsification promotion space formed by the water discharge surface and the peripheral edge in front of the water discharge surface.

[0044] A hair washing device characterized in that the shower head has protrusions on its outer surface.

[0045] A hair washing device characterized in that the protrusion is located near the water discharge surface.

[0046] An emulsification method for emulsifying the hair of a person being treated using the above-mentioned hair washing device, comprising the steps of: a practitioner gripping the shower head and placing the first joints of their fingers against the protrusions, thereby causing their fingers to extend from the water discharge surface in the direction of the water discharge; placing the fingers that extend in the direction of the water discharge against the hair of the person being treated in a position that leaves a gap between the water discharge surface and the hair of the person being treated, and bringing the water discharge surface close to the hair; and discharging the cleansing water from the water discharge surface, bouncing off the hair, and being received by the water discharge surface, thereby causing the cleansing water to stagnate in the emulsification promotion space.

[0047] Next, a specific configuration of the shower head of the beauty and hairdressing device 1 used in the foam generation method according to the embodiment of the present disclosure will be described as a second embodiment of the shower head with reference to the drawings. Figures 11 to 17 show the exterior and cross section of the second embodiment of the shower head 113.

[0048] 11 to 17, shower head 113 has a hose connection portion 120 to which a shower hose (not shown) is connected, a head main body portion 121 connected to the downstream side of hose connection portion 120 for hot and cold water, and a water discharge portion 122 formed on the downstream side of head main body portion 121. Water discharge portion 122 has a primary water discharge portion 153, a processing chamber 141 formed downstream of primary water discharge portion 153, and a secondary water discharge portion 150 located downstream of processing chamber 141. Hot and cold water flowing through the shower hose flows through hose connection portion 120 and head main body portion 121 in order, passes through primary water discharge portion 153 and processing chamber 141, and is discharged from secondary water discharge portion 150.

[0049] The head main body 121 is generally cylindrical, and inside the head main body 121 is a flow path switching unit 128 that switches the flow path of hot and cold water discharged from the primary water discharge unit 153, and two inflow chambers into which the hot and cold water whose flow path has been switched by the flow path switching unit 128 flows. The flow path switching unit 128 switches the flow path of the hot and cold water by moving a valve. The flow path switching unit 128 has a switch 129 for switching the flow path, and the switch 129 protrudes from the flow path switching unit 128 to the outside of the head main body 121. One of the inflow chambers is a cylindrical central flow path 130 located at the center of the head main body 121, and the other is a circular peripheral flow path 131 located on the outer periphery of the central flow path 130. A foaming member 132 is attached to the central flow path 130. The hot and cold water that passes through the foaming member 132 contains a large amount of air bubbles.

[0050] The primary water spouting surface 123 formed at the tip of the primary water spouting section 153 is circular or approximately circular. The primary water spouting surface 123 has a circular central water spouting surface 125 at the center of the primary water spouting surface 123 and a primary outer peripheral water spouting surface 126 that is annular and forms the outer periphery of the central water spouting surface 125. A plurality of water spouting holes 124 are formed in both water spouting surfaces 125, 126. The water spouting holes (not shown) in the central water spouting surface 125 are larger than the water spouting holes 124 in the primary outer peripheral water spouting surface 126. The central water spouting surface 125 is located downstream of the central flow path 130 of the head main body 121 and is formed by the downstream end face of the foaming member 132. The primary outer peripheral water spouting surface 126 is located downstream of the outer peripheral flow path 131 of the head main body 121.

[0051] The secondary water discharge surface 154 formed at the tip of the secondary water discharge section 150 is circular or approximately circular. The secondary water discharge surface 154 has a central blocked surface 151 at the center of the circle and a secondary outer peripheral water discharge surface 152 that is annular and is the outer periphery of this central blocked surface 151. The central blocked surface 151 is flat and has no holes. The secondary outer peripheral water discharge surface 152 has multiple water discharge holes 124 formed therein. The central blocked surface 151 faces the central water discharge surface 125 of the primary water discharge section 153, and the secondary outer peripheral water discharge surface 152 faces the primary outer peripheral water discharge surface 126 of the primary water discharge section 153. The diameter of the central water discharge surface 125 is equal to or smaller than the inner diameter of the secondary outer peripheral water discharge surface 152.

[0052] Multiple protrusions 134 are formed on the outer surface of the shower head 113, on the outer peripheral surface of the water spouting portion 122. The protrusions 134 are arranged at equal or approximately equal intervals along the periphery of the water spouting portion 122. The protrusions 134 gradually rise outward from the periphery 127 of the water spouting portion 122 in the direction opposite the water spouting direction. The apex 137, where this protrusion 136 rises, is a stripe-like structure that extends toward the periphery of the water spouting portion 122. The apex 137 is located 0.5 to 1.5 millimeters from the leading edge of the periphery 127 in the direction opposite the water spouting direction (see spacing 138 in Figure 14).

[0053] The shower head 113 is configured as described above. Next, a hair washing method using the beauty and hairdressing device 1 will be described with reference to the drawings, along with its functions and effects. FIG. 18 shows how the recipient grips the shower head 113 during the hair washing method. After applying a treatment such as hair coloring, the practitioner uses the hair washing method to wash away any chemicals adhering to the recipient's hair. The hot and cold water used in the hair washing method may be discharged from the central water discharge surface 125 or the primary outer peripheral water discharge surface 126 (hereinafter, in the shower head 113, the hot and cold water discharged from the central water discharge surface 125 will be referred to as "foam water," the hot and cold water discharged from the primary outer peripheral water discharge surface 126 will be referred to as "spray water," and either foam water or spray water will be referred to as "hot and cold water").

[0054] As shown in FIG. 18 , the practitioner first grasps the exterior of the shower head 113 so as to cover the outer periphery of the water discharger 122 from the head main body 121 side. For example, by placing the first joints of the fingers 17 or their vicinity against the apexes 37 of the protrusions 134, the fingers 17 are protruded in the direction of water discharge from the secondary water discharger 150. Therefore, the practitioner can use their fingertips while still gripping the shower head 113, allowing them to perform treatment with the fingers 17 gripping the shower head 113. Furthermore, multiple fingers 17 can be caught on the protrusions 134, allowing the shower head 113 to be held at equal intervals, preventing slippage. In particular, the apexes 137 of the protrusions 134 are horizontally elongated along the outer periphery of the water discharger 122 and gently rise from the periphery 127 (see FIG. 12 ), making it easy for the first joints of the fingers 17 to catch on them.

[0055] The stop valve 12 is turned as needed to discharge hot and cold water, and the multiphase flow generating device is operated before and after the hot and cold water is discharged. When the multiphase flow generating device is operated, the hot and cold water that has become a multiphase flow due to the inclusion of air is pressurized by the pump of the multiphase flow generating device and is forcefully discharged from the secondary outer peripheral water discharge surface 152 (hereinafter, in the shower head 113, the hot and cold water that has become a multiphase flow will be referred to as "washing water").

[0056] Next, the operation and effect of the beauty and hairdressing device 1 will be described.

[0057] When the cleansing water that has passed through the foaming member 132 flows into the treatment chamber 141 from the central discharge surface 125, the cleansing water hits the central blocking surface 151 and momentarily stagnates in the treatment chamber 141 while being agitated by water pressure, generating a large amount of uniform bubbles in the cleansing water. When this cleansing water is discharged from the secondary outer peripheral discharge surface 152 and hits the hair, the bubbles pop instantly, turning the cleansing water into a pseudo-carbonated spring that gives the user a simulated experience of the sensation of carbon dioxide gas popping. Therefore, the user can experience a simulated sensation of carbon dioxide gas popping without using carbon dioxide gas or the like. Furthermore, the fine bubbles collide with and pop adhesions on the hair, or lift the adhesions, thereby achieving a high cleansing effect.

[0058] For example, if an opening / closing section (not shown) is formed on the outer peripheral surface or central blocking surface 151 of the secondary water discharge section 150, and if tablets such as carbonate tablets, which are the carbon dioxide generating agent that is the raw material for carbonated spring, can be placed in the treatment chamber 141 through this opening / closing section, then in addition to the pseudo-carbonated spring, a carbonated spring with a strong stimulating effect will be generated by the carbon dioxide generating agent, and the person receiving the treatment will be able to noticeably experience the sensation of carbon dioxide gas popping. Furthermore, regardless of whether hot water, foam water, or wash water is used (i.e., whether pseudo-carbonated spring is generated or not), carbonated spring is generated by the carbonate tablets or the like. Therefore, the person receiving the treatment will be able to experience the sensation of carbon dioxide gas popping.

[0059] Next, the specific configuration of the shower head of the beauty and hairdressing device 1 used in the foam generation method according to an embodiment of the present disclosure will be described with reference to the drawings as a third embodiment of the shower head. Because the structure of the third embodiment is generally similar to that of the second embodiment of the shower head, the description of the third embodiment will refer to the drawings and the symbols that appear in the drawings that are referenced in the second embodiment. Therefore, the following description will mainly focus on the configuration that differs from the second embodiment, and descriptions of the configuration that is the same as the second embodiment will be omitted as appropriate. The third embodiment differs from the second embodiment primarily in that it has a straightening member instead of a foaming member (hereinafter, in the third embodiment, the hot and cold water discharged from the primary water discharge surface 123 of the primary water discharger 153 will be referred to simply as "hot and cold water," and the hot and cold water that has been converted into a multiphase flow will be referred to as "cleaning water").

[0060] In a third embodiment of the showerhead, as shown in Figure 15, a rectifying member 132 is attached to the central flow channel 130 of the head body 121. The rectifying member 132 has a structure for rectifying the flow of cleaning water to prevent the cleaning water from splashing before hitting the target, and this structure may be, for example, a lattice, mesh, or honeycomb shape. The rectifying member 132 may have any shape as long as it can perform the rectifying function. Furthermore, the rectifying member 132 may function not only as a rectifying member but also as a foaming member.

[0061] The primary water spouting surface 123 formed at the tip of the primary water spouting section 153 has a circular central water spouting surface 125 at the center of the primary water spouting surface 123, and a primary outer peripheral water spouting surface 126 that is annular and forms the outer periphery of the central water spouting surface 125. The central water spouting surface 125 is formed by the downstream end face of the straightening member 132. The total area of ​​the water spouting holes 124 formed on the secondary outer peripheral water spouting surface 152 of the secondary water spouting section 150 (i.e., the area of ​​each water spouting hole 124 multiplied by the number of water spouting holes 124) is smaller than the total area of ​​the water spouting holes (not shown) formed on the central water spouting surface 125 (i.e., the area of ​​each water spouting hole 124 multiplied by the number of water spouting holes). Therefore, the amount of water spouted from the central water spouting surface 125 is greater than the amount of water spouted from the secondary outer peripheral water spouting surface 152.

[0062] When the cleansing water that has passed through the straightening member 132 flows into the treatment chamber 141 from the central discharge surface 125, the cleansing water hits the central blocking surface 151 and momentarily stagnates in the treatment chamber 141 while being agitated by water pressure, generating a large amount of uniform bubbles in the cleansing water. When this cleansing water is discharged from the secondary outer peripheral discharge surface 152 and hits the hair, the bubbles pop instantly, turning the cleansing water into a pseudo-carbonated spring that gives the user a simulated experience of the sensation of carbon dioxide gas popping. Therefore, the user can experience a simulated sensation of carbon dioxide gas popping without using carbon dioxide gas or the like. Furthermore, the fine bubbles collide with and pop adhesions on the hair, or lift the adhesions, thereby achieving a high cleansing effect.

[0063] In particular, since the total area of ​​the water discharge holes 124 formed on the secondary outer peripheral water discharge surface 152 is smaller than the total area of ​​the water discharge holes formed on the central water discharge surface 125, the amount of water discharged from the central water discharge surface 125 is greater than the amount of water discharged from the secondary outer peripheral water discharge surface 152. Therefore, the wash water is appropriately retained and agitated in the treatment chamber 141, and air bubbles in the wash water are maintained.

[0064] Generally, the amount of water discharged from showers at beauty salons is 5.0 L / min to 10.0 L / min, but in the third embodiment of the showerhead, the sensation of carbon dioxide gas popping becomes pronounced when the amount of water discharged from secondary outer peripheral water discharge surface 152 is 4.6 L / min to 9.1 L / min and the air content in the water is 1.0 L / min to 4.5 L / min, provided that the air content in the water is less than the amount of water discharged from secondary outer peripheral water discharge surface 152. The relationship between the amount of water discharged and the air content is as shown in Table 1 below.

[0065]

[0066] The top row of Table 1 lists the values ​​of the discharge volume of hot and cold water discharged from the secondary outer peripheral spouting surface 152 when the multiphase flow generator is not operating, while the middle and bottom rows list the values ​​of the discharge volume of flush water discharged from the secondary outer peripheral spouting surface 152 when the multiphase flow generator is operating. The water discharge volume changes, increasing or decreasing, depending on the operation of the stop valve 12. Meanwhile, the pressure of the pump of the multiphase flow generator is constant. Note that the specifications of the multiphase flow generator include two operating modes with different pressures (NORMAL MODE and SOFT MODE), and therefore Table 1 divides the values ​​into the middle and bottom rows according to each operating mode.

[0067] When the multiphase flow generator is operating and air is mixed into the hot water, the amount of flushing water discharged decreases by the amount of the air bubbles, and the bubbles momentarily accumulate in the treatment chamber 141. Therefore, for example, even if the amount of water discharged is 5.0 L / min when the multiphase flow generator is not operating, the amount of water discharged decreases to 4.5 L / min when the multiphase flow generator is operating. Because the pressure of the pump of the multiphase flow generator is constant, as the amount of water discharged increases, the amount of air bubbles contained in the flushing water decreases. Therefore, for example, if the amount of water discharged increases from 5.3 L / min to 6.0 L / min, the amount of air contained in the flushing water decreases from 4.5 L / min to 4.3 L / min.

[0068] Even when the relationship "air content < discharged amount of wash water" holds, if the discharged amount of wash water is less than 4.6 [L / min], the water pressure will not be sufficient for treatment. On the other hand, if the discharged flow of wash water exceeds 9.1 [L / min], the amount of bubbles relative to the discharged amount will be too small, and the bubbles will disappear before treatment can be performed. Therefore, the discharged amount of wash water is 4.6 [L / min] to 9.1 [L / min]. Furthermore, even when the relationship "air content < discharged amount of wash water" holds, if the air content is less than 1.0 [L / min], the amount of bubbles will be too small, and the sensation of carbon dioxide gas popping will not be achieved. On the other hand, even when the relationship "air content < discharged amount of wash water" holds, if the air content exceeds 4.5 [L / min], the discharged amount of wash water will be too close to the lower limit (4.6 [L / min]), and the water pressure will not be sufficient for treatment. Therefore, the air content is 1.0 [L / min] to 4.5 [L / min].

[0069] In the third embodiment of the shower head 113, treatment can be performed with a water discharge rate (4.6 L / min) that is lower than the lower limit of the typical water discharge rate for showers in hair and beauty salons (5.0 L / min).

[0070] In the third embodiment of the shower head 113, the secondary water discharger 150 is detachable from the primary water discharger 153. This makes it easy to clean or repair the primary water discharger 153, secondary water discharger 150, and treatment chamber 141, and to replace the secondary water discharger 150. In addition, when the rectifying member 132 functions as a foaming member, foamy water can be discharged from the rectifying member 132.

[0071] In another embodiment of the showerhead, the outer surface of the showerhead does not have any protrusions. In another embodiment, the shape, number, and arrangement of the protrusions are optional. In another embodiment, the relationship between the diameter of the central water spouting surface and the inner diameter of the secondary outer peripheral water spouting surface is optional. In another embodiment, the water spouting surface of the primary water spouting unit is not formed by the lower end surface of the foaming member, but is a water spouting surface on which multiple water spouting holes are formed. In another embodiment, the primary water spouting surface is a single water spouting surface. In other words, the primary water spouting surface is formed only by the central water spouting surface, and is not formed by the central water spouting surface and the primary outer peripheral water spouting surface. In another embodiment, water spouting holes are formed on the entire secondary water spouting surface (i.e., water spouting holes are also formed on the central blocking surface). Even in this case, the total area of ​​the water spouting holes formed on the secondary water spouting surface is smaller than the total area of ​​the water spouting holes formed on the central water spouting surface of the primary water spouting surface.

[0072] <Additional Notes> The hair washing device described below refers to the above-described beauty and hairdressing device 1, and the hair washing device can be realized by at least including the shower head 113 and the multiphase flow generating device.

[0073] A hair washing device comprising: a multiphase flow generating device that generates wash water by converting hot and cold water for washing hair into a multiphase flow; and a shower head that discharges the wash water, wherein the water discharge section of the shower head comprises a primary water discharge section that discharges the wash water, a treatment chamber formed downstream of the primary water discharge section, and a secondary water discharge section formed downstream of the treatment chamber, and wherein the wash water discharged from the secondary water discharge section becomes a pseudo-carbonated spring that gives the user the simulated sensation of carbon dioxide gas popping.

[0074] A hair washing device characterized in that the water discharge surface of the primary water discharge section is formed by the downstream end surface of a flow straightening section built into the shower head.

[0075] A hair washing device characterized in that the total area of ​​the water discharge holes formed in the secondary water discharge section is smaller than the total area of ​​the water discharge holes formed on the downstream end surface of the straightening section, and the amount of water discharged from the primary water discharge section is greater than the amount of water discharged from the secondary water discharge section.

[0076] The hair washing device, characterized in that the secondary water discharge section has a closed central blocked surface, and the downstream end surface of the flow straightening section faces the central blocked surface.

[0077] A hair washing device characterized in that the primary water discharge section has a central water discharge surface which is the downstream end surface of the straightening section, and a primary outer peripheral water discharge surface formed on the outer periphery of the central water discharge surface, the secondary water discharge section has a secondary outer peripheral water discharge surface formed on the outer periphery of the central blocking surface, the central water discharge surface is circular, and the diameter of the central water discharge surface is equal to or less than the inner diameter of the secondary outer peripheral water discharge surface.

[0078] The hair washing device, wherein the secondary water discharger is detachable.

[0079] A hair washing device characterized in that the treatment chamber contains a carbon dioxide generating agent.

[0080] A hair washing device characterized in that the air content contained in the wash water is less than the amount of water discharged from the secondary water discharge section, the air content contained in the wash water is 1.0 to 4.5 [L / min], and the amount of water discharged from the secondary water discharge section is 4.6 to 9.1 [L / min].

[0081] Although the embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above embodiments, and various design modifications can be made to the present disclosure without departing from the scope of the claims.

[0082] DESCRIPTION OF SYMBOLS 1 Hairdressing and beauty device 2 Treatment table 3 Seat section 4 Lifting section 5 Seat section 6 Footrest section 7 Backrest section 8 Armrest section 9 Base section 10 Shampoo bowl 11 Drain outlet 12 Stop valve 13 Shower head 14 Bottom section 15 Peripheral wall section 16 Head support device 17 Fingers 20 Hose connection section 21 Head main body section 22 Water outlet section 23 Water outlet surface 24 Water outlet hole 25 Central water outlet surface 26 Peripheral water outlet surface 27 Peripheral edge section 28 Flow path water flow switching section 29 Switch 30 Central flow path 31 Peripheral flow path 32 Foaming member 33 Emulsification promotion space 34 Projection section 35 Tip edge 36 Raised section 37 Peak section 38 Spacing 39 Groove section 120 Hose connection part 121 Head main body part 122 Water discharge part 123 Primary water discharge surface 124 Water discharge hole 125 Central water discharge surface 126 Primary outer peripheral water discharge surface 127 Peripheral part 128 Flow path water flow switching part 129 Switch 130 Central flow path 131 Outer peripheral flow path 132 Foaming member, flow straightening member 134 Protrusion part 136 Raised part 137 Peak part 138 Spacing 141 Treatment chamber 150 Secondary water discharge part 151 Central blocking surface 152 Secondary outer peripheral water discharge surface 153 Primary water discharge part 154 Secondary water discharge surface

Claims

1. A foam generating method comprising: a closing step of closing the drain outlet of a shampoo bowl; an application step of applying a detergent to the inner surface of the shampoo bowl; and a water discharge step of bringing the water discharge surface of a shower head close to the detergent and discharging wash water, which is hot and cold water that has been made into a multiphase flow using a multiphase flow generating device, from the shower head, wherein the water discharge step includes a proximity step of keeping the water discharge surface close to the water surface in accordance with the rise in the water level of the wash water accumulated in the shampoo bowl, thereby generating foam in the shampoo bowl for cleansing the head of a person to be treated.

2. A foam generating method comprising the steps of: a closing step of closing the drain outlet of the shampoo bowl; an application step of applying a detergent to the inner surface of the shampoo bowl; and a water discharge step of, after the closing step and the application step, bringing the water discharge surface of the shower head close to the detergent applied to the inner surface of the shampoo bowl and discharging cleaning water, which is hot and cold water that has been made into a multiphase flow using a multiphase flow generating device, from the shower head and directing it at the detergent applied to the inner surface, thereby continuously generating foam within the shampoo bowl from the detergent applied to the inner surface for cleansing the head of a person to be treated.

3. A foam generating method as described in claim 2, characterized in that the foam generated in the shampoo bowl is layered so thickly that it completely covers the surface of the cleaning water accumulated in the shampoo bowl and makes the water surface invisible.

4. The foam generating method described in claim 3, characterized in that the water discharge step includes a swirling step of continuously swirling the shower head inside the shampoo bowl after the cleaning water is applied to the inner surface and its vicinity where the cleaning agent has been applied.

5. A foam generating method as described in any one of claims 2 to 4, characterized in that the water discharge procedure includes a proximity procedure of keeping the water discharge surface close to the water surface in accordance with the rise in the water level of the cleaning water accumulated in the shampoo bowl.

6. A foam generating method as described in any one of claims 2 to 4, characterized in that the water discharge procedure includes a foaming procedure in which foam water generated through a foaming member possessed by the shower head is used as the hot water.

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