Nozzle for scalp washer and scalp washer

Abstract

To provide a nozzle for scalp washer capable of effectively removing sebum soil or the like clogged in pores and capable of exposing hair roots.SOLUTION: A nozzle 1 includes: a first flat plate part 11; a second flat plate part 21; a first peripheral wall part 12 and a second peripheral wall part 22 forming a reservoir space S between the first flat plate part and the second flat plate part; a joint part 13 cylindrically projecting from the first flat plate part; an introduction hole 15 penetrating a part of a portion constituting a base part of the joint part in the first flat plate part; a plurality of projection parts 23 cylindrically projecting from the second flat plate part; and a jet hole 25 penetrating a part of each of portions constituting a base part of each of the plurality of projection parts in the second flat plate part. The total sum of cross-sectional areas of the plurality of jet holes is smaller than a cross-sectional area of the introduction hole.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a scalp washer nozzle that cleanses the scalp and removes sebum and other dirt clogging pores to expose hair roots, and to a scalp washer equipped with the scalp washer nozzle. [Background technology]

[0002] Shower heads that claim to generate fine bubbles for the purpose of cleaning dirt from the scalp are currently in use. It is claimed that these shower heads are effective in removing sebum and other dirt that has clogged the pores by penetrating the pores.

[0003] However, the problem with shower heads is that the hot water that hits the hair gets scattered, significantly reducing the amount of water that reaches the pores. Also, because the water pressure of the hot water that hits the hair decreases, even if the water does reach the pores, it has a problem of being weak at removing sebum and other dirt that gets clogged in the pores.

[0004] Multiple hairs grow from one hair follicle, and the part of each hair deeper than the epidermis is called the "hair root." The hair root is surrounded by a root sheath, and at the base of the hair root, hair matrix cells inside absorb nutrients from the capillaries via the dermal papilla, causing hair growth. Therefore, if the function of hair matrix cells declines, hair growth becomes insufficient, resulting in a thinner hair strand and a reduced number of hairs, resulting in the so-called "thinning hair." Although hair growth products that activate hair matrix cells are commercially available, because sebaceous glands open into hair follicles, the pores can become clogged with sebum secreted from the sebaceous glands. If the pores become clogged with sebum, even if a hair growth product is used, the ingredients of the product will not reach the base of the hair root, and the ingredients will not be able to act sufficiently on the hair matrix cells. If sebum and other dirt clogging the pores can be thoroughly removed, the hair roots will be exposed all the way to the base, allowing ingredients that contribute to hair growth to reach the base of the hair roots and act on the hair matrix cells.

[0005] Therefore, there has been a demand for a means for effectively removing sebum and other dirt clogging the pores and exposing the hair roots when washing the scalp. Summary of the Invention [Problem to be solved by the invention]

[0006] In view of the above circumstances, the present invention aims to provide a scalp washer nozzle that can effectively remove sebum dirt and the like that has clogged pores and can expose hair roots, and to provide a scalp washer equipped with the scalp washer nozzle. [Means for solving the problem]

[0007] In order to solve the above problems, the scalp washing nozzle according to the present invention comprises: "A first flat plate portion having a flat plate shape, A second flat plate portion having a flat plate shape; a peripheral wall portion that forms a storage space between the first flat plate portion and the second flat plate portion; a joint portion that protrudes in a cylindrical shape from the first flat plate portion in a direction opposite to the second flat plate portion; an introduction hole penetrating a part of a portion of the first flat plate portion that constitutes a base portion of the joint portion; a plurality of protrusions protruding in a cylindrical shape from the second flat plate portion in a direction opposite to the first flat plate portion; an ejection hole penetrating a part of each of the portions of the second flat plate portion that constitute the base of each of the plurality of protrusions, The sum of the cross-sectional areas of the plurality of ejection holes is smaller than the cross-sectional area of ​​the introduction hole.

[0008] Here, "the portion of the first flat plate portion that constitutes the base of the joint portion" refers to the portion of the first flat plate portion that is surrounded by the connection portion with the side peripheral surface of the cylindrical joint portion, and "the portion of the second flat plate portion that constitutes the base of each of the plurality of protrusions" refers to the portion of the second flat plate portion that is surrounded by the connection portion with the side peripheral surface of the cylindrical protrusion, for each of the plurality of protrusions.

[0009] When hot water is introduced into the joint, it flows through the internal space of the joint and flows into the storage space through an inlet hole that penetrates the part of the first flat plate that forms the base of the joint. When the storage space is filled with hot water, the hot water is sprayed out from the multiple outlet holes and passes through the cylindrical protrusion and sprays out from its tip. Therefore, by bringing the tip of the protrusion close to the scalp or so that the tip of the protrusion touches the scalp and moving the scalp washer nozzle along the scalp, the scalp can be washed with the hot water sprayed out from the protrusion.

[0010] In this case, the total cross-sectional area of ​​the multiple nozzles that spray hot water from the storage space is smaller than the cross-sectional area of ​​the inlet holes that introduce hot water into the storage space. Due to this cross-sectional area relationship, the hot water sprayed from the nozzles is pressurized and sprays out from the nozzles as high-pressure water. Therefore, the scalp can be washed with high-pressure water, and even if pores are clogged with sebum and other dirt, the high-pressure water can effectively remove it.

[0011] Furthermore, if one were to try to wash the scalp directly with hot water sprayed from the nozzles penetrating the second flat plate, it would be difficult for people with a lot of hair to bring the nozzles close to the scalp, significantly reducing the effectiveness of cleaning the scalp and pores. In contrast, in the present invention, multiple cylindrical protrusions protrude from the second flat plate, and nozzles are opened at the base of each protrusion, so that the hot water sprayed from the nozzles is sprayed from the tip of the protrusion. Therefore, when the scalp washer nozzle is moved along the scalp, the multiple protrusions act like comb teeth, forcing the hair aside and allowing the tips of the protrusions to approach or touch the scalp. As a result, the scalp washer nozzle of the present invention can spray high-pressure hot water toward the scalp and pores, effectively cleaning even people with a lot of hair. In addition, the scalp can be massaged by using high-pressure hot water jetted from the protrusions, or by moving the protrusions themselves, which act like comb teeth, against the scalp.

[0012] In addition to the above configuration, the scalp washing nozzle according to the present invention has: "The plurality of protrusions are arranged circumferentially, The thickness of the portion of the second flat plate portion where the portions constituting the base of each of the plurality of protrusions are connected in a circular shape can be smaller than the thickness of the other portions of the second flat plate portion.

[0013] If the thickness of the second flat plate portion through which the nozzle holes pass were large, there is a risk that the hot water flowing through the nozzle holes would come into contact with the inner circumferential surface of the nozzle holes, resulting in a decrease in water pressure. In contrast, in this configuration, the multiple protrusions are arranged circumferentially, and the thickness of the circular connecting portion of the second flat plate portion that forms the base of each of the multiple protrusions is set to be smaller than the thickness of the remaining portions. In other words, the nozzle holes are formed in the thinner portion of the second flat plate portion. Therefore, while the mechanical strength of the second flat plate portion is ensured in the thicker portion, the thickness of the portion where the nozzle holes are provided is reduced, suppressing the decrease in water pressure when passing through the nozzle holes and allowing high-pressure hot water to be ejected from the nozzle holes.

[0014] In addition to the above configuration, the scalp washing nozzle according to the present invention has: "A cleaning opening penetrating the second flat plate portion; and a lid for opening and closing the cleaning opening.

[0015] When using hot water from a bathtub as the hot water introduced into the inlet, minute particles of dust and other contaminants may be carried into the storage space. Because the outlet has a smaller cross-sectional area than the inlet, such particles are less likely to be expelled through the outlet and may accumulate in the storage space. In this configuration, a cleaning opening is formed in the second flat plate, and this cleaning opening can be opened and closed with a lid. Therefore, while the scalp washer nozzle is normally used with the cleaning opening closed by the lid, the inside of the storage space can be easily cleaned by removing the lid and opening the cleaning opening.

[0016] Next, the scalp washing device according to the present invention is as follows: "The scalp washer nozzle described above, An introduction pipe connected to the joint part of the scalp washer nozzle; and a pump that draws hot water from the outside and discharges it into the inlet pipe.

[0017] This is a scalp washer configuration that includes the scalp washer nozzle described above, and is equipped with a pump that can introduce hot and cold water into the scalp washer nozzle. If a small pump is used, the scalp washer can be made portable and can be used in different locations such as the bathroom or washroom, or taken with you when traveling. [Effects of the Invention]

[0018] As described above, according to the present invention, it is possible to provide a scalp washer nozzle that can effectively remove sebum dirt and the like that has clogged pores and can expose hair roots, and to provide a scalp washer equipped with the scalp washer nozzle. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a perspective view of a nozzle for a scalp washer according to an embodiment of the present invention. [Figure 2] This is the right side view of the scalp washer nozzle in Figure 1. [Figure 3] Cross-sectional view taken along line AA. [Figure 4] FIG. 2 is a schematic diagram of a scalp washer equipped with the scalp washer nozzle of FIG. 1. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, a scalp washer nozzle 1 according to one embodiment of the present invention and a scalp washer D equipped with this scalp washer nozzle 1 will be described with reference to the drawings.

[0021] As shown in Figures 1 to 3, the scalp washer nozzle 1 (hereinafter simply referred to as "nozzle 1") comprises a nozzle body having a first member 10 and a second member 20, and a grip part 40. As shown in Figure 4, the scalp washer D comprises, in addition to the nozzle 1, a pump 5, an inlet pipe 6, and a water intake pipe 7.

[0022] In the nozzle 1, the first member 10 includes a first flat plate portion 11, a first peripheral wall portion 12, a joint portion 13, and an introduction hole 15. The first flat plate portion 11 is in the shape of a flat disk (a circular flat plate), and the first peripheral wall portion 12 stands in one direction from the periphery of the first flat plate portion 11.

[0023] The joint portion 13 is cylindrical and stands upright in the center of the first flat plate portion 11 in the direction opposite to the direction in which the first circumferential wall portion 12 stands upright. The introduction hole 15 penetrates a part of the part of the first flat plate portion 11 that forms the base of the joint portion 13, and the inner diameter of the cylindrical joint portion 13 is approximately the same as the diameter of the introduction hole 15. In this embodiment, the outer diameter of the joint portion 13 changes discontinuously, and a step portion 13c is formed between a large diameter portion 13a, which has a larger outer diameter on the base side, and a small diameter portion 13b, which is further towards the tip side.

[0024] The second member 20 includes a second flat plate portion 21, a second peripheral wall portion 22, a flange portion 24, a plurality of protrusions 23, ejection holes 25, discharge holes 27, a cleaning opening 31, and a lid 32. The second flat plate portion 21 is flat and disk-shaped, and the second peripheral wall portion 22 stands in one direction from the periphery of the second flat plate portion 21. The direction in which the second peripheral wall portion 22 stands from the second flat plate portion 21 is opposite to the direction in which the first peripheral wall portion 12 stands from the first flat plate portion 11. The flange portion 24 extends outward from the second peripheral wall portion 22 in the direction in which the second flat plate portion 21 is extended.

[0025] Each of the multiple protrusions 23 is cylindrical and stands upright from the second flat plate portion 21 in a direction opposite to the direction in which the second circumferential wall portion 22 stands upright. The ejection holes 25 penetrate a portion of each of the portions of the second flat plate portion 21 that form the base of each of the multiple protrusions 23. The inner diameter of the cylindrical protrusions 23 and the diameter of the tip openings 23h are larger than the diameter of the ejection holes 25, specifically 3 to 10 times larger. In addition, the tips of the protrusions 23 are formed into rounded curved surfaces without any corners.

[0026] Discharge hole 27 penetrates the side circumferential surface near tip opening 23h of each of the plurality of protrusions 23. Discharge hole 27 does not communicate with tip opening 23h.

[0027] The outer diameter of the second peripheral wall portion 22 is slightly smaller than the inner diameter of the first peripheral wall portion 12. Therefore, by fitting the second peripheral wall portion 22 into the inside of the first peripheral wall portion 12, the first member 10 and the second member 20 can be integrated in a watertight manner. At this time, the flange portion 24 of the second member 20 abuts against the end of the first peripheral wall portion 12 of the first member 10.

[0028] By fitting the second peripheral wall portion 22 into the inside of the first peripheral wall portion 12 and integrating the first member 10 and the second member 20, a storage space S is formed between the first flat plate portion 11 and the second flat plate portion 21. In addition, the single introduction hole 15 and the multiple ejection holes 25 each communicate with the storage space S. The first peripheral wall portion 12 and the second peripheral wall portion 22 correspond to the "peripheral wall portion" of the present invention.

[0029] The sum of the cross-sectional areas of the multiple ejection holes 25 (the area of ​​the portion surrounded by the opening edge in a plane perpendicular to the axial direction of the ejection holes 25) is smaller than the cross-sectional area of ​​one introduction hole 15 (the area of ​​the portion surrounded by the opening edge in a plane perpendicular to the axial direction of the introduction hole 15), specifically 1 / 3 to 1 / 2.

[0030] In this embodiment, the number of ejection holes 25 is an odd number, and the odd number of ejection holes 25 are provided at equal angular intervals on a single circumference concentric with the disk-shaped second flat plate portion 21. The number of ejection holes 25 is preferably 3 to 9, and here, five ejection holes are shown as an example.

[0031] In second flat plate portion 21, the thickness of the circularly connected portion that constitutes the base of each of multiple protrusions 23 is set to be smaller than the thickness of the remaining portions. In other words, ejection holes 25 penetrate the thin portions of second flat plate portion 21. Because multiple ejection holes 25 are provided on a single circumference that is concentric with second flat plate portion 21, it is easy to make the thickness of the portions through which ejection holes 25 penetrate thinner than the remaining portions by rotating a cutting tool or a workpiece.

[0032] The cleaning opening 31 penetrates the second flat plate portion 21 at a position that does not interfere with the multiple ejection holes 25 and at a portion that is thicker than the portion through which the ejection holes 25 penetrate. In this embodiment, the cleaning opening 31 is circular, and is provided inside and concentric with an imaginary circle in which the ejection holes 25 are arranged in the second flat plate portion 21. A female thread is formed on the inner peripheral surface of the cleaning opening 31.

[0033] The cover 32 opens and closes the cleaning opening 31, is disk-shaped, and has a male thread on its outer circumferential surface that screws into the female thread of the cleaning opening 31. The cover 32 is formed with a rotation operation groove 32r for rotating the cover 32. Here, the rotation operation groove 32r is illustrated as a groove that can be rotated with a coin without using a tool, but it may also be a groove that can be rotated using a tool such as a Phillips or flathead screwdriver.

[0034] Grip portion 40 is substantially cylindrical and has an outer circumferential surface that is continuously curved so as to be concave at the middle position in a cross section cut along a plane parallel to the axial direction and passing through the center, and this concave portion makes it easy to grip with the fingers. Grip portion 40 can be integrated with first member 10, i.e., the nozzle body, by inserting small-diameter portion 13b of joint portion 13 into one end of introduction pipe 6 and butting the end of introduction pipe 6 against step portion 13c, and then inserting introduction pipe 6 and joint portion 13 into grip portion 40.

[0035] Next, we will explain how to use and the operation of the scalp washer nozzle 1 and the scalp washer D. When using the scalp washer D, the washing opening 31 provided in the second flat plate portion 21 is closed with the lid 32.

[0036] The pump connection 6j at the end of the inlet pipe 6 opposite the end connected to the joint 13 of the nozzle 1 is connected to an inlet pipe connection port (not shown in the drawing) provided at one end of the pump 5. One end of the suction pipe 7 is connected to a suction pipe connection port 5b provided near the other end of the pump 5. A strainer 7s is attached to the other end of the suction pipe 7, and the end on the strainer 7s side is immersed in hot water. The hot water may be drawn and stored in a container such as a washbasin, or it may be hot water in a bathtub. If the pump 5 is highly waterproof, the suction pipe 7 need not be used and the pump 5 can be immersed in hot water so that the suction pipe connection port 5b is located in the water. In this document, "hot water" refers to either "hot water" or "cold water."

[0037] When the pump 5 is operated in this state, hot water is sucked into the pump 5 through the suction pipe connection port 5b and discharged into the inlet pipe 6 through the inlet pipe connection port. The pump 5 can be a "pulsating" type pump in which the flow rate of the hot water sucked in and discharged increases and decreases periodically, and the pressure also fluctuates accordingly. For example, a pump that pulsates several dozen times per second can be used.

[0038] Hot water sent from pump 5 to inlet pipe 6 flows through the internal space of joint 13 to which inlet pipe 6 is connected and flows into storage space S through inlet hole 15, which penetrates first flat plate 11 at the base of joint 13. When storage space S is filled with hot water, the hot water sprays out from multiple outlet holes 25 and from tip openings 23h of protrusions 23. Therefore, by holding grip 40 with the fingers, bringing the tips of protrusions 23 close to the scalp or so that the tips of protrusions 23 are in contact with the scalp, and moving nozzle 1 along the scalp, hot water sprayed from outlet holes 25 can be sprayed out from protrusions 23 to cleanse the scalp. Because the tips of protrusions 23 are formed into a rounded curved surface, the scalp will not be injured even if the nozzle is moved with the tips of protrusions 23 in contact with the scalp.

[0039] The total cross-sectional area of ​​the multiple jet holes 25 that jet hot water from the storage space S is smaller than the cross-sectional area of ​​one introduction hole 15 that introduces hot water into the storage space S. Due to this relationship in cross-sectional areas, the hot water jetting out from the jet holes 25 is pressurized and jets out as high-pressure hot water from the jet holes 25. Therefore, the scalp can be washed with high-pressure hot water, and even if pores are clogged with sebum dirt and the like, the high-pressure hot water can effectively remove it.

[0040] Here, if the protrusions 23 were not present, the hot and cold water sprayed from the nozzle holes 25 penetrating the second flat plate portion 21 would directly wash the scalp. In this case, for people with a large amount of hair, it would be difficult to bring the nozzle holes 25 close to the scalp, significantly reducing the effectiveness of cleaning the scalp and pores. In contrast, the nozzle 1 has multiple cylindrical protrusions 23 protruding from the second flat plate portion 21, with nozzle holes 25 opening at the base of each protrusion 23. As a result, the hot and cold water sprayed from the nozzle holes 25 flows through the internal space of the protrusions 23 and then sprays from the tip openings 23h of the protrusions 23. When the nozzle 1 is moved along the scalp, the multiple protrusions 23 act like comb teeth, allowing the multiple protrusions 23 to push aside the hair before the tip openings 23h of the protrusions 23 are brought into contact with the scalp. Therefore, the nozzle 1 can spray high-pressure hot water toward the scalp and pores, even for people with a lot of hair, and can effectively wash them.

[0041] Furthermore, if the hot water ejected from the nozzle holes 25 at the base of the protrusion 23 comes into contact with the inner peripheral surface of the cylindrical protrusion 23 as it flows through the inside of the protrusion 23, there is a risk that the pressure of the hot water ejected from the nozzle holes 25 will decrease. In contrast, in this embodiment, the inner diameter of the protrusion 23 and the diameter of the tip opening 23h are set larger than the diameter of the nozzle holes 23. Therefore, the risk of the pressure of the hot water ejected from the nozzle holes 25 decreasing as it flows through the inside of the protrusion 23 and is ejected from the tip opening 23h is significantly reduced, and the high-pressure hot water can effectively cleanse the scalp and effectively remove sebum and other dirt clogging the pores.

[0042] Furthermore, if the thickness of the portion of second flat plate portion 21 through which ejection holes 25 penetrate is large, there is a risk that the water pressure will decrease significantly due to friction with the inner circumferential surface of ejection holes 25 when hot water flows through the interior of ejection holes 25. In contrast, in this embodiment, the thickness of the portion of second flat plate portion 21 through which ejection holes 25 penetrate is set to be smaller than the thickness of the other portions. Therefore, by having ejection holes 25 penetrate the portion with a smaller thickness while ensuring the mechanical strength of second flat plate portion 21, it is possible to suppress the decrease in water pressure when passing through ejection holes 25, and to eject high-pressure hot water from ejection holes 25.

[0043] Hot water spurting out from tip opening 23h of protrusion 23 may hit the scalp and return to the internal space of protrusion 23. Because protrusion 23 has discharge holes 27 opening on the side circumferential surface, hot water that hits the scalp and returns to the internal space of protrusion 23 is effectively discharged from discharge holes 27.

[0044] Here, as a configuration for discharging hot and cold water, a configuration in which a notch-like groove is formed around the periphery of the tip opening 23h is conceivable. Even with this configuration, hot and cold water that hits the scalp and returns is discharged through the notch-like groove. However, when a notch-like groove is formed around the periphery of the tip opening 23h, the groove is connected to the tip opening 23h, so there is a risk that hair may get caught in the groove, or that the scalp may be injured at the boundary between the groove and the tip opening 23h when the tip of the protrusion 23 is brought into contact with the scalp and moved. If an attempt is made to smooth the boundary between the groove and the tip opening 23h to avoid injuring the scalp, the processing is very time-consuming. In contrast, in this embodiment, the discharge hole 27 penetrates the side surface of the protrusion 23, and the discharge hole 27 is not continuous with the tip opening 23h of the protrusion 23, so there is no risk of hair getting caught in the discharge hole 27, and it is also easy to process the tip of the protrusion 23 so that the scalp is not damaged even when the tip of the protrusion 23 is placed against the scalp and moved.

[0045] Furthermore, when hot water from a bathtub is used as the hot water introduced through the inlet pipe 6, minute particles of dust and the like contained in the hot water may not be completely removed by the strainer 7s and may flow into the storage space S through the inlet hole 15. Because the cross-sectional area of ​​the outlet hole 25 is smaller than that of the inlet hole 15, it is difficult for dust and the like to be discharged to the outside through the outlet hole 25, and there is a risk that the dust and the like may accumulate in the storage space S. In this embodiment, a cleaning opening 31 is formed in the second flat plate portion 21, and this cleaning opening 31 can be opened and closed with the lid 32. Therefore, the nozzle 1 is normally used with the cleaning opening 31 closed by the lid 32, but the inside of the storage space S can be easily cleaned by removing the lid 32 and opening the cleaning opening 31.

[0046] Such cleaning openings 31 are formed in a part of the second flat plate portion 21 that is thicker than the base of the protrusion 23 through which the ejection holes 25 pass, and therefore cleaning openings 31 that require a certain degree of depth (thickness) to form a spiral female thread can be easily formed in the second flat plate portion 21. Furthermore, because the part of the second flat plate portion 21 where the cleaning openings 31 are formed is thick, it is possible to provide the cleaning openings 31 while suppressing a decrease in the mechanical strength of the second flat plate portion 21.

[0047] In addition, the cover 32, which opens and closes the cleaning opening 31 by screwing male and female screws together, can be rotated with a coin, so it can be easily opened and closed even without any tools at hand.

[0048] Furthermore, in the nozzle 1, multiple protrusions 23 are provided at equal angular intervals on the circumference of the second flat plate portion 21. If the number of protrusions 23 were an even number and provided at equal angular intervals on the circumference of the second flat plate portion 21, when the nozzle 1 was moved along the scalp, the protrusions 23 located at the front in the direction of movement and the protrusions 23 located at the rear in the direction of movement could move along the same trajectory, which would be inefficient for thoroughly cleansing the scalp. In contrast, in this embodiment, the number of protrusions 23 is an odd number and they are provided at equal angular intervals on the circumference of the second flat plate portion 21. Therefore, when the nozzle 1 was moved along the scalp, the protrusions 23 located at the front in the direction of movement and the protrusions 23 located at the rear in the direction of movement could not move along the same trajectory. Therefore, the hot and cold water sprayed from the multiple protrusions 23 can efficiently and thoroughly cleanse the entire scalp.

[0049] In addition, when a "pulsating type" pump 5 is used as the pump 5, the hot and cold water sprayed from the protrusions 23 massages the scalp, thereby promoting blood circulation. In addition, when the protrusions 23 themselves are moved while being placed in contact with the scalp, a massaging effect can also be obtained by contact with the protrusions 23.

[0050] As described above, the nozzle 1 and the scalp washer D equipped with the nozzle 1 can thoroughly cleanse the scalp with hot water jetted at high pressure, effectively removing sebum and other dirt clogging the pores. The hair roots are exposed in the pores from which sebum and other dirt have been removed. Therefore, if the scalp is dried after washing to remove moisture from the inside of the pores, and then a hair growth agent or the like is applied to the scalp, ingredients that contribute to hair growth can be effectively applied to the hair matrix cells at the base of the exposed hair roots.

[0051] The present invention has been described above by citing preferred embodiments, but the present invention is not limited to the above embodiments, and various improvements and design changes are possible as described below, without departing from the spirit of the present invention.

[0052] For example, in the above embodiment, the number of protrusions 23 (the number of ejection holes 25) is 5, but the number of protrusions 23 is not limited to this and may be more or less than 5. For example, the number of protrusions 23 may be 3. The surface of the scalp is a curved surface close to a sphere, but when there are 3 protrusions 23, the tips of all of the protrusions 23 can be brought into contact with the scalp most stably.

[0053] Furthermore, although the above example illustrates a case where multiple protrusions 23 are arranged on a single circumference, the virtual circle on which some of the multiple protrusions are arranged and the virtual circle on which the other multiple protrusions are arranged can be concentric circles with different diameters. [Explanation of symbols]

[0054] 1 nozzle (scalp washer nozzle) 5. Pump 6 Introductory tube 11 First flat plate part 12 First peripheral wall part (peripheral wall part) 13 Joint 15 Inlet hole 21 Second flat plate part 22 Second peripheral wall part (peripheral wall part) 23 Protrusion 25 Spout hole 31 Cleaning opening 32 Lid S storage space

Claims

1. a first flat plate portion having a flat plate shape; A second flat plate portion having a flat plate shape; a peripheral wall portion that forms a storage space between the first flat plate portion and the second flat plate portion; a joint portion that protrudes in a cylindrical shape from the first flat plate portion in a direction opposite to the second flat plate portion; an introduction hole penetrating a part of a portion of the first flat plate portion that constitutes a base portion of the joint portion; a plurality of protrusions protruding in a cylindrical shape from the second flat plate portion in a direction opposite to the first flat plate portion; an ejection hole penetrating a part of each of the portions of the second flat plate portion that constitute the base of each of the plurality of protrusions, The total cross-sectional area of ​​the plurality of ejection holes is smaller than the cross-sectional area of ​​the introduction hole. A scalp washer nozzle characterized by:

2. The plurality of protrusions are arranged circumferentially, The thickness of a portion of the second flat plate portion where the portions constituting the bases of the plurality of protrusions are connected in a circular shape is smaller than the thickness of the other portions of the second flat plate portion.

2. The scalp washing nozzle according to claim 1.

3. a cleaning opening extending through the second plate portion; and a cover for opening and closing the cleaning opening.

3. The scalp washing nozzle according to claim 1 or 2.

4. The scalp washing nozzle according to claim 1, An introduction pipe connected to the joint part of the scalp washer nozzle; and a pump that discharges hot and cold water sucked from the outside into the inlet pipe. A scalp washer characterized by:

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