shower head

Abstract

To provide a low-cost shower head which can change hot water discharged from the shower head into fine bubble water by simply replacing the shower head, and has a sterilizing effect on microorganisms, fungi such as bacteria, and viruses, and an effect of inactivating viruses. [Solution] The shower head has a shower surface that is connected to a shower hose and can discharge multiple shower discharge patterns, and is equipped with a switch lever that selects one of multiple water discharge patterns to be discharged from the shower surface, and a handle that holds the shower head.The handle has a water inlet that connects to the water supply port of the shower hose, and an internal water passage that is connected to the water inlet and passes tap water to the shower head.Removably connected between the handle and the water inlet are a fine bubble water generator 33 and a cylindrical silver ion water generating cartridge that contains silver ion glass particles that release silver ions into the water when they come into contact with water supplied from the water inlet.

Description

[Technical Field]

[0001] The present invention relates to a shower head for use in a bathroom, etc., and in particular to a shower head that converts hot or cold water (hereinafter referred to as "hot water") discharged from the shower head into fine bubble water, and furthermore, to a shower head that can impart antiviral and sterilizing effects to the discharged hot water. [Background technology]

[0002] In this application, fine bubble water (fine bubble water) refers to hot water containing a large number of microbubbles with a diameter of approximately 100 μm or less and nanobubbles (diameter of approximately 50 to 500 nm). The tiny bubble water penetrates the skin and hair follicle cell tissue and effectively washes away dirt, making it useful for washing the body and hair and for washing clothes. In particular, fine bubble water effectively penetrates pores and sweat glands, effectively removing dirt, sebum, and other substances, and in recent years has also come to be used in the fields of beauty and health.

[0003] Furthermore, the cleaning effect of fine bubble water due to its electrical action is also attracting attention. The surface of fine bubble water is usually negatively charged, and the bubbles do not coalesce but instead diffuse and float within the water. In contrast, sebum and dirt that adheres to not only the human body but also to the bathtub, walls, and ceiling of a bathroom are usually positively charged and electrically bond to the negatively charged object being cleaned. Therefore, when negatively charged fine bubble water adsorbs to positively charged dirt, it electrically neutralizes it, making it easier for the dirt to separate from the object being cleaned.

[0004] Showerheads typically found in bathrooms include a water inlet connected to a shower hose inlet, a discharge surface with multiple outlets, and a handle that extends integrally from the discharge surface and incorporates a water passageway that channels hot and cold water from the hose to the discharge surface. Various types of showerheads are available, allowing the user to select one of several modes by operating a lever. Most showerheads currently used in ordinary home bathrooms are of this type.

[0005] Furthermore, in recent years, shower devices have been disclosed that are capable of forcefully ejecting hot and cold water in the form of a jet of water from the tip of a shower head (see, for example, Patent Documents 1 and 2).

[0006] A showerhead with this type of jet water jet function can be used to shower users, for example, by showering their heads and shoulders with a high-speed jet of hot water instead of spraying water from the shower head itself, or to remove dirt from the body or achieve a massage effect without using much soap or other soap.It can also be used to clean the bathtub, floor, walls, etc. in a bathroom. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] China Innovative Patent Approval Publication No. CN216704726U [Patent Document 1] Japanese Patent Application Publication No. 2024-018246 Summary of the Invention [Problem to be solved by the invention]

[0008] However, although the above-mentioned known shower head has the function of ejecting jet water, it does not have the function of discharging fine bubble water.

[0009] Shower heads with the above-mentioned known jet water discharge function, including many shower heads, are used for cleaning purposes, using the jet of hot and cold water to wash away dirt from the body, as well as dirt and slime that has accumulated around the bathtub, and on the floor, walls, and ceiling of the bathroom.

[0010] However, in many cases, microorganisms, bacteria, and other fungi, as well as viruses, are trapped in the joints of tiles on bathroom floors and walls. While high-speed jets of hot water can remove dirt and slime from surfaces, it is difficult to wash away the microorganisms, bacteria, and other fungi, and viruses that have become trapped in the joints of bathroom floors and walls.

[0011] On the other hand, spraying germicidal cleaners such as chlorine or sodium hypochlorite, which have a germicidal effect, into the bathroom and then taking time to clean the bathtub and bathroom not only takes a long time for the cleaning work using these germicidal cleaners and the rinsing work of the germicidal cleaners, but also leaves a lingering smell of chlorine or the like in the bathroom even after the germicidal cleaners are rinsed off, making bathing immediately afterwards an unpleasant experience.

[0012] The present invention was made in consideration of the above-mentioned problems, and its main purpose is to provide a shower head that can easily and inexpensively spray fine bubble water simply by replacing the shower head in use, and that also has the effect of sterilizing and inactivating microorganisms, fungi such as bacteria, and viruses. [Means for solving the problem]

[0013] In order to achieve the above object, the showerhead according to the first aspect of the present invention is a showerhead having a shower discharge surface that is connected to a shower hose and can discharge water in a plurality of shower discharge patterns, water The shower head is provided with a switching lever for selecting one of a plurality of water discharge modes from a surface, and a grip for holding the shower head, the grip being configured to hold a shower hose. from Connect to the water inlet The shower head Connected to the inlet and a gripping portion on the shower discharge surface side that is connected to the shower discharge surface side. , The grip portion on the water inlet side and the grip portion on the shower discharge surface side are formed separable by being screwed together, The aforementioned On the inlet side Gripping part Within The device detachably houses a fine bubble water generator and a cylindrical silver ion water generating cartridge that contains silver ion glass particles that release silver ions into the water when they come into contact with the water supplied from the water receiving port. The water that has passed through the fine bubble water generator and the silver ion water generating cartridge is supplied to the shower water discharge surface side through an internal water passage provided inside the grip part on the shower water discharge surface side. , characterized by:

[0014] In order to achieve the above object, the showerhead according to the second aspect of the present invention is a showerhead having a shower water discharge surface that can be connected to a shower hose and can discharge water in one or more water discharge patterns, and a jet water outlet that discharges a jet of water in a narrowed water flow from the front vertical direction of the shower water discharge surface, water a switch lever for selecting one of a plurality of shower water discharge modes from the shower water discharge surface, a water discharge switch for switching between shower water discharge from the shower water discharge surface and jet water discharge from the jet water discharge port, and a grip for holding the shower head, the grip being a shower hose. from Connect to the water inlet The shower head Connected to the inlet and a gripping portion on the shower discharge surface side that is connected to the shower discharge surface side. , The grip portion on the water inlet side and the grip portion on the shower discharge surface side are formed separable by being screwed together, The aforementioned Inlet side Gripping part Within The device detachably houses a fine bubble water generator and a cylindrical silver ion water generating cartridge that contains silver ion glass particles that release silver ions into the water when they come into contact with the water supplied from the water receiving port. The water that has passed through the fine bubble water generator and the silver ion water generating cartridge is supplied to the shower water discharge surface side through an internal water passage provided inside the grip part on the shower water discharge surface side. , characterized by:

[0015] As a result, the shower head of this second type can convert hot water containing silver ions into nanobubble water and eject it in a powerful, high-speed flow, making it possible to wash away microorganisms, bacteria, fungi, and viruses that have gotten into the joints of the bathroom floor and walls.

[0016] In this way, this shower head has a detachable fine bubble water generator and a cylindrical silver ion water generating cartridge that contains silver ion glass particles that release silver ions into the water when they come into contact with water supplied from the water inlet, between the handle of the shower head and the water inlet.This gives the shower head the ability to generate nanobubble water, in response to user needs, and also makes it possible to provide the sterilizing and virus-inactivating effects of silver ions.

[0017] Here, at least the cylindrical silver ion water generating cartridge containing silver ion glass particles can be replaced by the user periodically (for example, every 2 to 5 years) depending on the amount of hot water used (number of users, etc.) in order to maintain its bactericidal and virus inactivation effects.

[0018] The silver ion water generating cartridge forms a cylindrical silver ion water generating cartridge holder, the water inlet is threadedly connected to the silver ion water generating cartridge holder, and the silver ion water generating cartridge holder is threadedly connected to the handle portion and forms part of the handle portion.

[0019] Here, the silver ion particles contain at least silver oxide and boron oxide, and a water-permeable cap having a circular plate with multiple holes drilled therein is fitted to both sides of the cylindrical silver ion water generating cartridge, and the silver ion glass particles are contained within the cylindrical silver ion water generating cartridge.

[0020] The switching lever is provided on the grip side of the front shower water-discharging surface, and the water discharge switch is provided on the back side of the shower water-discharging surface.

[0021] On the other hand, Fine bubble water generator is before Note Showerhead Do grasping DepartmentThe tap water is discharged from the cylinder by a water inlet face having four branch holes formed concentrically at a predetermined distance from the central axis of the cylinder, and the tap water is discharged from the cylinder by a water outlet face having four branch holes. In is before Note Showerhead Do grasping Department Inside When inserted, the shower head is fixed together with the shower head side water inlet, which constitutes a coupler joint type joint that can be detachably connected to the hose side water inlet that supplies water to the shower head. It will be stored.

[0022] The inner wall of the cylinder between the water inlet and outlet faces has an uneven section formed by spiral cuts, and water flowing in from the four branch holes of the water inlet face comes into contact with and collides with the spiral uneven section, causing turbulence within the cylinder, which breaks up the air bubbles in the tap water into fine particles and causes nanobubble water to flow out of the water outlet face.

[0023] The four branch holes provided on the water inlet faceplate are: are arranged at equal intervals at positions equidistant from the central axis, The central axis from the inlet to the outlet is The water inlet surface By tilting the nozzle at a predetermined angle with respect to the central axis, the efficiency of generating nanobubble water can be increased.

[0024] The four branch holes provided in the water inlet face are arranged at equal intervals on the concentric circle, and when viewed from the direction of water flow from the water inlet face to the water outlet face, the center positions of the branch holes in the water inlet face and the water outlet face are offset by a predetermined angle so that they do not coincide.The cylindrical body is made of brass, stainless steel, or resin.

[0025] This allows the user to easily replace the shower head currently in use by simply removing it from the shower hose and screwing the shower head of the present invention onto the shower hose.

[0026] Furthermore, the cylindrical silver ion water generating cartridge containing silver ion glass particles usually provides antibacterial and antiviral effects for about two years, and the silver ion water generating cartridge can be easily replaced by the user themselves.

[0027] The silver ion particles contain at least silver oxide and boron oxide, which allows the silver ion elution to be sustained evenly.

[0028] Meanwhile, water-passing caps, which are circular plates with multiple holes drilled into them, are fitted to both sides of the cylindrical silver ion water generating cartridge, and the silver ion glass particles are contained within the cylindrical silver ion water generating cartridge. [Effects of the Invention]

[0029] The showerhead according to the first aspect of the present invention makes it possible to easily and inexpensively replace a showerhead currently in use with one that has the effect of sterilizing and inactivating microorganisms, fungi such as bacteria, and viruses, and is also capable of emitting nanobubble water.

[0030] Furthermore, the showerhead according to the second aspect of the present invention allows for the showerhead currently in use to be easily and inexpensively converted into a showerhead that can forcefully eject hot and cold water in the form of a jet of water, has the effect of sterilizing and inactivating microorganisms, fungi such as bacteria, and viruses, and is also capable of emitting nanobubble water, simply by replacing the showerhead currently in use.

[0031] As a result, the shower head according to the second aspect of the present invention can convert hot water containing silver ions into nanobubble water and eject it in a powerful, high-speed flow, making it possible to wash away microorganisms, bacteria, fungi, and viruses that have gotten into the joints of the bathroom floor and walls.

[0032] Silver ions are known to have bactericidal and antibacterial properties against lower organisms such as microorganisms. Microorganisms, in the narrow sense, refer to bacteria, fungi, and viruses, but in the broad sense, also include protozoa and algae.

[0033] The bactericidal and antiviral effects of silver ions are due to the fact that the silver ions produced when they dissociate from oxygen are unstable (positively charged Ag+), and so they attempt to bind with the oxygen of microbial bacteria (negatively charged) and are taken up into the cells of microorganisms (viruses, bacteria, fungi, algae, etc.), exerting their antibacterial properties.The taken-up silver ions bind to proteins, etc., inhibiting their function and preventing cell division, etc.It is thought that this dysfunction of the proteins generates reactive oxygen species, which then kills the microbial cells. [Brief explanation of the drawings]

[0034] [Figure 1] 1 shows a perspective view of a showerhead according to the present invention. [Figure 2] 1 shows a side view of a showerhead according to the present invention. [Figure 3] 1 shows a cylindrical silver ion water generating cartridge containing silver ion glass particles removably housed in the shower head according to the present invention, housed in the grip of the shower head. [Figure 4] FIG. 4 is a vertical cross-sectional perspective view illustrating the internal structure of a cylindrical silver ion water generating cartridge that contains the silver ion glass particles shown in FIG. 3. [Figure 5] This shows the configuration (part 1) of the fine bubble water generator housed in this shower head. Part (a) shows the internal configuration of the fine bubble water generator when housed in the grip of this shower head, and how it is housed. Part (b) shows the side of the water inlet face and the side of the water outlet face. The four holes in the water inlet face and the four holes in the water outlet face are aligned in the direction of water flow. Part (c) shows a perspective view of the AA' cross section of the fine bubble water generator shown in (b). A spiral cut is made on the inner surface of the cylinder. [Figure 6] This shows the configuration (part 2) of the fine bubble water generator housed in this shower head. Part (a) shows the internal configuration of the fine bubble water generator when housed in the grip of this shower head, and how it is housed. Part (b) shows the side of the water inlet face and the side of the water outlet face. The four holes in the water inlet face and the four holes in the water outlet face are rotated approximately 90 degrees in the direction of water flow. Part (c) shows the BB' cross section of the fine bubble water generator shown in (b). A spiral cut is made on the inner surface of the cylinder. DETAILED DESCRIPTION OF THE INVENTION

[0035] The showerhead according to the present invention will be described in detail below. As described above, the showerhead according to the first aspect of the present invention is a showerhead having a shower discharge surface that is connected to a shower hose and can discharge one or more types of shower water, and a cylindrical silver ion water generating cartridge and / or fine bubble water generator that contains silver ion glass particles can be removably installed within the showerhead.

[0036] On the other hand, the showerhead according to the second aspect of the present invention has a shower head with a shower water-discharging surface that can be connected to a shower hose and can discharge one or more shower types of water, and a jet water outlet that discharges a jet of water with a narrowed water flow from the front vertical direction of the shower water-discharging surface, and a cylindrical silver ion water generating cartridge and / or fine bubble water generator that contains silver ion glass particles can be detachably installed inside the shower head.

[0037] The cylindrical silver ion water generating cartridges containing silver ion glass particles that are removably housed in the showerheads of these two aspects of the present invention have the same shape, and are housed in the same position and method within the showerhead.Similarly, the fine bubble water generators that are removably housed in the showerheads of these two aspects of the present invention also have the same shape, and are housed in the same position and method within the showerhead.

[0038] The following description of the showerhead according to the present invention will focus on a second embodiment of the showerhead, which has a shower-discharge surface that can be connected to a shower hose and can discharge showers in multiple shower discharge patterns, and a jet water outlet that discharges a jet of water with a narrowed water flow from the front vertical direction of the shower-discharge surface, and in which a cylindrical silver ion water generating cartridge containing silver ion glass particles and / or a fine bubble water generator can be detachably installed.

[0039] Incidentally, not only various types of showerheads that allow the user to switch between multiple water discharge modes by operating a lever, but also shower devices that forcefully discharge hot and cold water in a jet stream from a showerhead are disclosed in detail in, for example, Patent Documents 1 and 2. This application describes how a cylindrical silver ion water generating cartridge containing silver ion glass particles and / or a fine bubble water generator are removably housed within these showerheads, which is a particularly key feature of the present invention. In the following description, the directions indicated by the arrows in Figure 2 are referred to as the "front-to-back" and "up-to-down" directions, respectively.

[0040] [Shower head configuration] The showerhead according to the present invention can detachably accommodate a cylindrical silver ion water generating cartridge and / or a fine bubble water generator that contains silver ion glass particles. The following describes the configuration of the showerhead 1 according to the present invention, which can detachably accommodate a silver ion water generating cartridge and / or a fine bubble water generator.

[0041] FIG. 1 shows a perspective view of a showerhead according to the present invention, and FIG. 2 shows a side view of the showerhead. As shown in Figures 1 and 2, this showerhead 1 comprises a water-discharging body 2 consisting of a hollow, disc-shaped water-discharging surface and a back surface extending rearward from the water-discharging surface, and a cylindrical handle 3 extending downward integrally from the water-discharging body 2. The water-discharging surface and handle 3 are molded integrally from hard resin, and their surfaces are plated.

[0042] As shown in Figures 1 and 2, this shower head 1 has a shower discharge surface that can be connected to a shower hose 9 to discharge water in one or more water discharge modes, a jet water outlet 6a that discharges a jet of water with a narrowed water flow from the vertical front side of the shower discharge surface, a switch lever 5 that selects one of the one or more shower water discharge modes to be discharged from the shower discharge surface, an ON / OFF switch 7 that switches between shower water discharge from the shower discharge surface and jet water discharge from the jet water outlet 6a, and a gripping part 3 for holding the shower head 1.

[0043] Here, the grip part 3 is provided with a water inlet 8A that connects to the water inlet of the shower hose that supplies hot and cold water to the shower head 1, and an internal water passage that is connected to the water inlet 8A and passes tap water to the shower head 1, and between the grip part 3 and the water inlet 8A are removably configured a cylindrical silver ion water generating cartridge 20 that contains silver ion glass particles that release silver ions into the water when they come into contact with water, and a fine bubble water generator 33.

[0044] Here, the water-discharging body is composed of a main body 2A and a cover 2B rotatably attached to the main body 2A, and the space defined by the main body 2A and the cover 2B contains a water flow channel which is a storage space for a cylindrical silver ion water generating cartridge 20 that contains silver ion glass particles and a fine bubble water generator 33 within the gripping part 3 shown in Figure 1, a water flow channel cover (not shown) provided within the gripping part 3 that covers the water flow channel, a spray nozzle (jet water nozzle) 6, a branching part that branches hot and cold water to the shower water-discharging surface and the spray nozzle 6, a branching part setting plate, a water-passing plate, etc.

[0045] The underside of cover 2B forms a shower surface shaped like an arc, with multiple spray nozzles 4 opening into this shower surface (see Figures 1 and 2). Cover 2B is integrally formed with a switch lever 5 for rotating cover 2B relative to main body 2A, and by operating switch lever 5 to rotate cover 2B relative to main body 2A, the spray pattern from spray nozzles 4 can be changed.

[0046] As shown in Figures 1 and 2, the water-discharging body main body 2A has a spray nozzle 6 with multiple openings 6a built in the front center thereof, and a sliding ON / OFF switch 7 for turning on / off the spray of water from the spray nozzle 6a of the spray nozzle 6 is provided in the center of the width direction behind the spray nozzle 6 on the top surface of the main body 2A.

[0047] As is well known (not shown), the inside of this showerhead 1 has a disk-shaped substrate portion for switching the shower mode from the emitting surface 2A, and a flow channel formed integrally on the substrate portion, which is a storage space for a cylindrical silver ion water generating cartridge 20 that contains silver ion glass particles within the gripping portion 3 shown in Figure 1, and a fine bubble water generator 33, and an inlet pipe that forms a flow channel cover located within the gripping portion 3 is connected to the flow channel portion.

[0048] A rod-shaped switching rod is housed within the circulation section of showerhead 1 and can slide back and forth. This switching rod is constantly biased backward (to the OFF direction) by an internal spring. The switching rod is connected to ON / OFF switch 7 (see Figure 2). Sliding ON / OFF switch 7 forward against the biasing force of the spring causes water to be sprayed from the multiple water outlets 4 opening onto the shower surface of cover 2B on the water-spraying surface of showerhead 1. Releasing ON / OFF switch 7 causes the switching rod to slide backward due to the biasing force of the spring, shutting off water from the water outlets 4 on the shower surface and causing water to spray forward in a powerful jet stream from outlets 6a of spray nozzle 6.

[0049] As shown in Figure 1, the ends of the handles 3, 10 of the showerhead 1 can be easily connected to one end of a shower hose 9 with a single touch using a coupler joint fitting 8, thereby connecting the other end of the shower hose 9 to a water source such as a tap or hot water heater. Here, coupler joint fitting 8 is composed of a cylindrical water inlet 8A that is threaded into the end opening of the handle 3 of the showerhead 1, and a water inlet 8B that is attached to one end of the shower hose 9. By inserting water inlet 8A into water inlet 8B, the showerhead 1 can be easily connected to one end of the shower hose 9 with a single touch.

[0050] Next, the main technical configuration of the showerhead 1 according to the present invention will be described with reference to FIG. In the shower head 1 according to the present invention, the silver ion water generating cartridge 20 and the fine bubble water generator 33 are removably housed inside the gripping parts 3, 10.

[0051] As shown in Figure 3, the device comprises a cylindrical outer tube 11, a cylindrical screw member 12 press-fitted into the front end of the outer tube 11, and an annular nut member 13 for fixing a silver ion water generating cartridge 20 removably stored in the center of the interior of the outer tube 11 and the screw member 12, and furthermore, a fine bubble water generator 33 can be stored upstream of the cylindrical screw member 12.

[0052] As shown in FIG. 3, the fine bubble water generator 33 is removably housed by being fitted inside a cylindrical socket 8 that is screwed into the end openings of the gripping parts 3, 10 of the shower head 1.

[0053] 3 and 5, the fine bubble water generator 33 is housed so as to fit into the female thread of a cylindrical coupler joint fitting 8 that is screwed into the end opening of the grip part 3 of the shower head 1, and into the male thread 12b formed on the outer periphery of the end of a screw member 12 that is screwed into the female thread of the coupler joint fitting 8 (see FIGS. 5 and 6). The housed state of the fine bubble water generator 33 will be explained in detail in FIGS. 5 and 6.

[0054] As shown in FIG. 1, a coupler joint type coupling 8 is connected to a male thread formed portion 12b of a cylindrical screw member 12 press-fitted into the front end portion of a cylindrical outer cylinder 11.

[0055] As described above and in Figure 1, the shower head 1 is composed of a cylindrical water inlet 8A screwed into the end opening of the handle 3 of the shower head 1 and a water inlet 8B attached to one end of the shower hose 9. By inserting the water inlet 8A into the water inlet 8B, the shower head 1 can be easily connected to one end of the shower hose 9 with a single touch.

[0056] Next, regarding the storage of the silver ion water generating cartridge 20, as shown in Figures 3 and 4, a circular convex portion 11a (see Figure 4) is integrally formed on the inner periphery of the front end of the gripping portion 3, 10 of the showerhead 1, and a female thread 11b is engraved on the inner periphery of the rear end. The outer periphery of the outer cylinder 11 is knurled to prevent slipping. Furthermore, two oval air vent holes 11c (only one of which is shown in Figures 2 and 3) are formed in two locations in the middle of the outer cylinder 11 in the longitudinal direction.

[0057] 4, an annular protrusion 12a is integrally formed on the inner periphery of the front end of the screw member 12, and a male thread 12b is formed on the outer periphery of the front end. An annular flange 12c is integrally formed on the outer periphery of the screw member 12 behind the male thread 12b, and a ring-shaped elastic seal ring (O-ring) 14 and a locking ring (snap ring 15) are fitted onto the outer periphery of the cylindrical portion 12A behind the flange 12c.

[0058] The silver ion water generating cartridge 20 is configured by closing the front and rear end openings of a cylindrical case 21 with disk-shaped caps 22, 23, respectively. Here, each cap 22, 23 is formed with a plurality of circular water passage holes 22a, 23a, respectively, and each cap 22, 23 is attached to the front and rear ends of the case 21 by fitting the outer periphery of its inner end surface onto the outer periphery of the front and rear ends of the case 21. Ring-shaped elastic seal rings (O-rings) 24, 25 are fitted onto the outer periphery of each cap 22, 23, respectively.

[0059] The space formed by the case 21 and the pair of caps 22, 23 of the silver ion water generating cartridge 20 contains silver ion glass particle agent 26, which generates silver ions when it comes into contact with water. In this embodiment, silver-containing glass (phosphate glass) is used as the silver ion glass particle agent 26, and its components include silver oxide (AgO), boron oxide (3(BO)n), diphosphorus pentoxide (PO), and calcium oxide (CaO).

[0060] Depending on the state of the microorganisms and the concentration of silver ions (antibacterial effects are seen even in extremely small amounts of 0.01 ppm - 0.00001 g per liter), silver ions can have either a bacteriostatic or bactericidal effect. Because even minute amounts of silver ions can be expected to have a bactericidal and antibacterial effect against a wide range of viruses and bacteria, they are suitable for use as a highly safe, non-polluting antibacterial agent, making them ideal for cleaning bathrooms.

[0061] The nut member 13 is an annular member that is fitted onto the outer periphery of one (rear) cap 23 when the silver ion water generating cartridge 20 is in an assembled state as shown in Fig. 4, and has a male thread 13a formed on its outer periphery that screws into a female thread 11b formed on the inner periphery of the rear end of the outer cylinder 11. Engagement grooves 13b are formed at two radially opposing locations on the rear end surface of the nut member 13, for engagement with the claws of a tool (not shown) (see Fig. 3).

[0062] As described above, the adapter 10, which includes the outer cylinder 11, the screw member 12, and the nut member 13 as its main components, is assembled and integrated as follows.

[0063] 4, the outer tube 11 and the screw member 12 are assembled and integrated by fitting a protrusion 11a formed on the inner periphery of the front end of the outer tube 11 onto the outer periphery of the cylindrical portion 12A behind the flange portion 12c of the screw member 12. At this time, the fitting portion between the protrusion 11a of the outer tube 11 and the cylindrical portion 12A of the screw member 12 is sealed by an elastic seal ring (O-ring) 14, and the positioning of the outer tube 11 and the screw member 12 in the front-to-rear direction is determined by a locking ring (snap ring) 15.

[0064] Next, the nut member 13 is fitted onto the outer periphery of the cap 23 on the rear end side of the silver ion water generating cartridge 20, and the silver ion water generating cartridge 20 is inserted into the screw member 12 and the outer cylinder 11. That is, the silver ion water generating cartridge 20 is inserted from rear to front into the outer cylinder 11 and the screw member 12, with one cap 22 (on the front end side) first, and with the male thread 13a of the nut member 13 screwed into the female thread 11b engraved on the inner periphery of the rear end of the outer cylinder 11, the claws of a tool (not shown) are engaged with the engagement grooves 13b formed in two places on the rear end surface of the nut member 13, and the nut member 13 is rotated in the screwing direction.

[0065] As a result, the nut member 13 advances forward inside the outer tube 11 and the screw member 12 together with the silver ion water generating cartridge 20, and as shown in Figure 6, the outer periphery of the cap 22 on the front end side of the silver ion water generating cartridge 20 fits onto the inner periphery of the protrusion 12a of the screw member 12. As a result, the silver ion water generating cartridge 20 is supported at its front end by the screw member 12 via the cap 22, and at its rear end by the outer tube 11 via the cap 23 and the nut member 13, and is removably inserted into the adapter 10. The silver ion water generating cartridge 20 thus inserted into the adapter 10 can be easily removed together with the adapter 10 from the grip portion 3 of the showerhead 1 and replaced with a new one.

[0066] The adapter 10 configured as described above is removably attached to the gripping portion 3 of the showerhead 1. That is, as shown in Fig. 2, the male thread 12b formed on the outer periphery of the screw member 12 of the adapter 10 is screwed into the female thread (not shown) formed on the inner periphery of the rear end of the gripping portion 3, thereby removably attaching the adapter 10 to the rear end of the gripping portion 3.

[0067] Additionally, the water inlet 8A of the coupler joint fitting 8 shown in Figure 1 is threaded into the female thread 11b engraved on the inner periphery of the rear end of the outer tube 11 of the adapter 10 that constitutes the gripping parts 3, 10. Therefore, by inserting the water inlet 8A into the water inlet 8B attached to the end of the shower hose 9, the shower head 1 can be easily connected to the end of the shower hose 9 with a single touch.

[0068] [How the shower head works] Next, the operation of the showerhead 1 configured as above will be described. When using shower head 1 installed in a bathroom or other location, a user turns ON / OFF switch 7 OFF and operates selector lever 5, which causes water (hot water) from a water source such as a tap or hot water heater to be supplied through shower hose 9 to shower head 1. The water (hot water) flowing through shower hose 9 first passes through silver ion water generating cartridge 20 inserted into adapter 10 of shower head 1.

[0069] That is, water (hot water) supplied from the shower hose 9 to the shower head 1 first passes through the silver ion water generating cartridge 20 inserted into the adapter 10. Specifically, in the silver ion water generating cartridge 20, the water (hot water) passes through multiple water passage holes 23a formed in one (rear) cap 23 and flows into the inside of the case 21 of the silver ion water generating cartridge 20, and this water (hot water) comes into contact with the silver ion glass particle agent 26 contained in the case 21, generating silver ion water having bactericidal and deodorizing effects. This silver ion water then passes through multiple water passage holes 22a formed in the other (front) cap 22 and is discharged into the grip part 3.

[0070] In showerhead 1, silver ion water discharged into handle 3 is supplied to the water discharge surface through handle 3 and sprayed from multiple spray nozzles 4 opening on the shower surface, which is the underside of cover 2B of said water discharge surface, to be used for washing the user's body and shampooing and rinsing hair. This silver ion water provides high bactericidal and deodorizing effects. Operating switch lever 5 to rotate cover 2B of the water discharge surface relative to main body 2A changes the spray pattern of the silver ion water sprayed from spray nozzles 4. Silver ion water, with its strong bactericidal and deodorizing effects, can also be used to wash pets such as dogs and cats.

[0071] On the other hand, when the ON / OFF switch 7 of the shower head 1 is turned ON, the spraying of silver ion water from the shower surface is stopped, and the silver ion water generated in the silver ion water generating cartridge 20 is forcefully sprayed forward from the multiple spray outlets 6a opening into the spray nozzle 6, and is used to clean, for example, the walls and floors of the bathroom, the drain, the door sash, etc.

[0072] Considering consumption and the maintenance of deodorizing and sterilizing effects, the silver ion glass particle agent 26 that generates silver ion water can be used for more than three years (5,500 uses), for example, if the shower head 1 is used about two to six times a day (the duration of the silver ion effect). However, if it is used for a longer period than that, the silver ion water generating cartridge 20 must be replaced with a new one. The method for replacing the silver ion water generating cartridge 20 will be described below.

[0073] When replacing a silver ion water generating cartridge 20 currently in use with a new one, it is necessary to remove the silver ion water generating cartridge 20. This removal of the silver ion water generating cartridge 20 is performed by the following procedure: When the entire adapter 10 with the silver ion water generating cartridge 20 inserted therein is rotated around its axis in the loosening direction, the male thread 12b of the screw member 12 is released from the female thread (not shown) formed on the inner periphery of the rear end of the gripping portion 3, and the adapter 10 can be removed from the gripping portion 3 together with the water inlet 8A threaded thereto.

[0074] When the adapter 10 is removed from the grip portion 3 together with the water inlet 8A as described above, the water inlet 8A is turned relative to the adapter 10 to release the threaded connection between them, and the water inlet 8A is removed from the adapter 10. When the water inlet 8A is removed from the adapter 10 in this manner, the claws of a tool (not shown) are engaged with the engagement grooves 13b formed in two places on the outer surface of the nut member 13 shown in Figure 6, the nut member 13 is rotated with the tool in the loosening direction, and the nut member 13 and the silver ion water generation cartridge 20 held therein are moved rearward along the female thread 11b engraved on the inner periphery of the rear end of the outer cylinder 11, and the nut member 13 and the silver ion water generation cartridge 20 are removed.

[0075] On the other hand, unlike the silver ion water generating cartridge 20, the fine bubble water generator 33 does not deteriorate in its fine bubble water generating function, so it does not need to be replaced, but can be removed when cleaning the inside of the shower head.

[0076] To remove the silver ion water generating cartridge 20, it is removed from the nut member 13, a new silver ion water generating cartridge 20 is attached to the nut member 13, the male thread 13a of the nut member 13 is threaded onto the female thread 11b of the outer tube 11, and the nut member 13 is rotated in the tightening direction together with the silver ion water generating cartridge 20. As a result, the nut member 13 and the silver ion water generating cartridge 20 move forward along the female thread 11b of the outer tube 11 while rotating. Then, as shown in Figure 6, when one (front) cap 22 of the silver ion water generating cartridge 20 is fitted onto the inner periphery of the protrusion 12a of the screw member 12, the silver ion water generating cartridge 20 is fixed in place, and finally, the water inlet 8A is screwed into the female thread 11b of the outer tube 11 of the adapter 10, completing the replacement of the silver ion water generating cartridge 20.

[0077] In the above, the method of removing the entire adapter 10 from the grip part 3 and then removing the silver ion water generating cartridge 20 from the removed adapter 10 and replacing it with a new one has been adopted, but it is also possible to replace the silver ion water generating cartridge 20 with a new one while the adapter 10 remains attached to the grip part 3 without removing the adapter 10 from the grip part 3. This method will be described below.

[0078] That is, when the water inlet 8A is removed from the outer tube 11 of the adapter 10 while leaving the adapter 10 in the grip portion 3, the state shown in Figure 6 is obtained. From this state, the claws of a tool (not shown) are engaged with the engagement grooves 13b formed in two places on the outer surface of the nut member 13 shown in Figure 6, the nut member 13 is rotated in the loosening direction with the tool, and the nut member 13 and the silver ion water generation cartridge 20 held therein are moved rearward along the female thread 11b engraved on the inner periphery of the rear end of the outer tube 11, and the nut member 13 and silver ion water generation cartridge 20 are removed.

[0079] Thereafter, the silver ion water generating cartridge 20 is removed from the nut member 13, a new silver ion water generating cartridge 20 is attached to the nut member 13, the male thread 13a of the nut member 13 is threaded onto the female thread 11b of the outer tube 11, and the nut member 13 is rotated in the tightening direction together with the silver ion water generating cartridge 20. As a result, the nut member 13 and the silver ion water generating cartridge 20 move forward along the female thread 11b of the outer tube 11 while rotating. Then, as shown in FIG. 4 , when one (front) cap 22 of the silver ion water generating cartridge 20 is fitted onto the inner periphery of the protrusion 12a of the screw member 12, the silver ion water generating cartridge 20 is fixed in place. Finally, by screwing the water inlet 8A into the female thread 11b of the outer tube 11 of the adapter 10, the silver ion water generating cartridge 20 can be replaced without removing the entire adapter 10 from the grip portion 3.

[0080] As described above, the handle parts 3, 10 of this showerhead 1 are provided with a water inlet 8A that connects to the water supply port of a shower hose that supplies tap water such as hot and cold water to the showerhead 1, and an internal water passage (not shown) that is connected to this water inlet 8A and passes tap water through this showerhead 1. A cylindrical silver ion water generating cartridge 10 containing silver ion glass particles that release silver ions into the water when they come into contact with water is removably connected between the handle part 3 and the water inlet 8A.

[0081] FIG. 5 shows a first example of the configuration of a fine bubble water generator 33 housed in the shower head together with the silver ion water generating cartridge 20 (in series).

[0082] Here, part (a) shows the internal structure of the fine bubble water generator 3 when housed in the grip parts 3, 10, and part (b) shows the side of the water inlet face 33-2 and the side of the water outlet face 33-3. In this first example of the fine bubble water generator, the four holes 36 in the water inlet face 33-2 and the four holes 37 in the water outlet face 33-3 are aligned in the direction of water flow. Part (c) shows a perspective view of the AA' cross section of the fine bubble water generator shown in part (b). A spiral cut is made on the inner surface of the cylindrical body 33-1 of the fine bubble water generator 33.

[0083] Here, the sides of the water inlet face 33-2 and the water outlet face 33-3 are pressed into the water inlet end and water outlet end of the cylinder, and then welded or glued depending on the material, so that water leakage and separation do not occur even under high water pressure.

[0084] As shown in Figure 5(a), the fine bubble water generator 33 is composed of a cylinder 33-1 that is arranged in close contact with the inner surface of the gripping parts 3 and 10 of the shower head 1, a water inlet surface 33-2 that has four branch holes 36 (36-1, 36-2, 36-3, 36-4) formed concentrically at a predetermined distance (a size corresponding to the diameter size of the cylinder 33-1) from the central axis of the cylinder 33-1 for supplying tap water, and a water outlet surface 33-3 that has branch holes 7 (37-1, 37-2, 37-3, 37-4) for supplying tap water from the cylinder 33-1.

[0085] Here, the cylindrical body 33-1 is inserted into the inner surface of the gripping parts 3, 10 (Figure 1) of the shower head 1, and is fixed to the water supply hose main body 2 together with the joint coupler 4 by a circular crimping material 10 covering the exterior of the gripping parts 3, 10 of the shower head 1, and an uneven portion 33-4 is formed by spiral cuts on the inner wall of the cylindrical body 33-1 between the water inlet face 33-2 and the water outlet face 33-3.

[0086] The water flowing in from the four branch holes 36 of the water inlet surface 33-2 comes into contact with and collides with the spiral uneven portion 33-4, causing turbulence within the cylindrical body 33-1, which efficiently breaks down the air bubbles in the tap water into small particles and causes nanobubble water to flow out of the water outlet surface 33-3.

[0087] In this way, the shower head 1 has the built-in fine bubble water generator 33 stored within the gripping portions 3, 10, and the cylindrical body 33-1 (which has 33-2 and 33-3 built in) of the fine bubble water generator 33 stored within the gripping portions 3, 10. With this state, the cylindrical body 33-1 (which has 33-2 and 33-3 built in) of the fine bubble water generator 33 can be easily stored and fixed within the gripping portions 3, 10 together with the coupling coupler 4 that is fitted into the water faucet by the circular crimping material 10 that covers the exterior of the gripping portions 3, 10 of the shower head 1, so the shower head 1 can be manufactured at low cost.

[0088] On the other hand, in conventional fine bubble water generators, unlike the fine bubble water generator 33 constituting the present showerhead 1, the outer tube is not simply cylindrical, and the structure for generating nanobubble water inside it is also complex, as shown in Figure 6. In contrast, in the fine bubble water generator 33 constituting the present showerhead 1, the resistance to the water flowing inside the cylindrical body 33-1 of the fine bubble water generator 33 is dramatically reduced, so the water pressure of the tap water supplied from the water pipe is not significantly reduced, and combined with the action of the nanobubble water flowing out of the outlet body 33-3 hitting the inner wall of the flowing water wall in the gripping parts 3, 10, it is possible to effectively generate the same number of nano-sized fine bubbles as conventional fine bubble water generators.

[0089] Figure 6 shows a second example of a fine bubble water generator. Part (a) shows the internal structure of the fine bubble water generator when housed within the gripping parts 3 and 10 of the shower head 1, and part (b) shows the side of the water inlet and outlet faces.

[0090] Here, in this second example, unlike the first example shown in Figure 5, the four holes 37 (37-1, 37-2, 37-3, 37-4) in the water outlet body 3-3 are rotated approximately 90 degrees in the water flow direction from the four holes 36 (36-1, 36-2, 36-3, 36-4) in the water inlet body 33-2. Also, part (c) is the same as the first example shown in Figure 5, but shows the BB' cross section of the fine bubble water generator shown in (b). A spiral cut 3-4 is made on the inner surface of the cylinder 33-1.

[0091] As described above, in the second example shown in Figure 6, the four branch holes 36 provided in the water inlet surface 33-2 and the four branch holes 37 provided in the water outlet surface 33-3 have their central axes inclined at 90 degrees relative to the central axis of the water intake plate. Therefore, the water that passes through the four holes 36 in the water inlet surface 33-2 does not form a straight water flow but forms a vortex in the water inlet holes 36 and water outlet holes within the cylinder 33-1. As a result, more water flows collide with the spiral notches in the cylinder 33-1, and nanobubble water can be generated more efficiently.

[0092] The water inlet and outlet faces are made of brass, resin or stainless steel material with a thickness of at least 3 millimeters, and the cylindrical body is made of brass, stainless steel or resin material.

[0093] As a result, the present invention makes it possible to provide a showerhead that, simply by replacing the showerhead currently in use, can produce hot water that is released from the showerhead as nanobubble water and forcefully ejects it in the form of a jet of water, while also having the effect of sterilizing and inactivating microorganisms, fungi such as bacteria, and viruses.

[0094] FIG. 5 shows a first example of the configuration of the fine bubble water generator 33 housed within the showerhead. (a) shows the internal configuration of the fine bubble water generator 33 housed within the handles 3 and 10 of the showerhead 1, while (b) shows the side of the water inlet face 33-2 and the side of the water outlet face 33-3. In this first example of the showerhead, the four holes 6 in the water inlet face 33-2 and the four holes 7 in the water outlet face 33-3 are aligned in the direction of water flow. (c) shows a perspective view of the AA' cross section of the fine bubble water generator shown in (b). The inner surface of the cylinder 33 of the fine bubble water generator 33 is spirally notched. The side of the water inlet face 33-2 and the water outlet face 33-3 are press-fitted into the inlet and outlet ends of the cylinder, and then welded or glued, depending on the material, to prevent water leakage or detachment even under high water pressure.

[0095] As shown in Figure 5(a), the fine bubble water generator 33 is composed of a cylinder 33-1 that is arranged in close contact with the flow channel in the gripping portion 3, 10 of the shower head 1, a water inlet surface 3-2 that has four branch holes 6 (36-1, 36-2, 36-3, 36-4) formed concentrically at a predetermined distance (a size corresponding to the diameter size of the cylinder 33-1) from the central axis of the cylinder 33-1 for tap water to flow out, and a water outlet surface 33-3 that has four branch holes 37 (37-1, 37-2, 37-3, 37-4) for flowing out tap water from the cylinder 3.

[0096] Here, the fine bubble water generator 33 is housed inside the gripping parts 3, 10 of the showerhead 1. As shown in Figures 5(a) and 6(a), the fine bubble water generator 33 fits inside the water inlet 8A that constitutes the cylindrical coupler joint fitting, and is housed so that it fits into the male threads 12b formed on the outer periphery of the end of the screw member 12 that is threadably connected to the female threads of the water inlet 8A. This prevents the fine bubble water generator 33 from moving or vibrating inside the gripping parts 3, 10 due to the water flow.

[0097] The fine bubble water generator 33 has an inner wall of a cylinder 33-1 between the water inlet face 33-2 and the water outlet face 33-3, on which an uneven portion 33-4 is formed by spiral cuts.

[0098] Water flowing in from the four branch holes 36 of the water inlet surface 33-2 comes into contact with and collides with the spiral uneven portion 33-4, creating turbulence within the cylindrical body 33-1, which efficiently breaks down the air bubbles in the tap water into small particles and causes nanobubble water to flow out of the water outlet surface 33-3.

[0099] In the fine bubble water generator 33 housed in the grip of this shower head, resistance to the water flowing inside the cylindrical body 3-1 of the fine bubble water generator 3 is dramatically reduced, so the water pressure of the tap water supplied from the water pipe is not significantly reduced, and combined with the action of the nanobubble water flowing out of the water outlet body 33-3 hitting the inner wall of the water supply hose main body 2, it is possible to effectively generate the same number of nano-sized fine bubbles as conventional fine bubble water generators.

[0100] Figure 6 shows a second example of a fine bubble water generator housed within the present shower head. Part (a) shows the internal structure of the fine bubble water generator 33 when housed in the gripping portion 3, 10 of the showerhead 1, and part (b) shows the side of the water inlet and outlet faces. Unlike the first example shown in Figure 5, this second example differs from the first example shown in Figure 5 in that the four holes 7 (37-1, 37-2, 37-3, 37-4) in the water outlet face 33-3 are rotated approximately 90 degrees in the direction of water flow relative to the four holes 36 (36-1, 36-2, 36-3, 36-4) in the water inlet face 33-2. Part (c) is the same as the first example shown in Figure 5, but shows the BB' cross section of the fine bubble water generator shown in (b). A spiral cut 33-4 is made on the inner surface of the cylinder 33-1.

[0101] Thus, in the second example shown in Figure 6, the four branch holes 36 provided in the water inlet surface 33-2 and the four branch holes 37 provided in the water outlet surface 33-3 have their central axes inclined at 90 degrees to the central axis of the water intake plate. Therefore, the water that passes through the four holes 36 in the water inlet surface 33-2 does not form a straight water flow through the water inlet holes 36 and the water outlet holes within the cylinder 33-1, but forms a vortex. As a result, more water flows collide with the spiral notches in the cylinder 33-1, and nanobubble water can be generated more efficiently.

[0102] The water inlet and outlet faces are made of brass, resin or stainless steel material with a thickness of at least 5 millimeters, and the cylindrical body is made of brass, stainless steel or resin material.

[0103] As is clear from the above explanation, the silver ion water generating cartridge 20 and the fine bubble water generator 33 are removably stored in the adapter 10 that constitutes the handle parts 3, 10 of the shower head 1 at the rear end of the handle part 3, and in particular, the silver ion water generating cartridge 20 can be easily attached and detached, and if necessary, the silver ion water generating cartridge 20 can be easily replaced with a new one.

[0104] As described above, this shower head 1 is characterized by the fact that the fine bubble water generator, the cylindrical silver ion water generating cartridge 20 containing silver ion glass particles that release silver ions into the water when they come into contact with water supplied from the water inlet 8A, and the fine bubble water generator 33 that turns hot water into fine bubble water are easily and detachably connected within the gripping parts 3, 10 that connect to the water inlet 8A, which is connected to the water inlet 8B of the shower hose 9.By simply replacing the shower head currently in use with shower head 1, it is possible to provide a shower head that has the function of emitting fine bubble water and also has the effect of sterilizing and inactivating microorganisms, fungi such as bacteria, and viruses.

[0105] Furthermore, the present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims and the technical ideas described in the specification and drawings. [Explanation of symbols]

[0106] 1 shower head 2. Water discharge body 3 Gripping part 4 Sprinkler outlet 5 Switching lever 6 Spout nozzle 6a spout 7 ON / OFF switch 8 Coupler joint type fitting Shower head side water inlet that forms an 8A coupler joint type fitting 8B Coupler joint type fitting that forms the hose side water inlet 9. Shower hose 10 Adapter that constitutes the gripping part 11 Outer cylinder 12 Screw member 13 Nut material 20 Silver ion water generating cartridges 21 cases 22,23 Water-permeable cap 22a,22b Water hole 26 Silver ion glass particle agent 33 Fine Bubble Water Generator 33-1 Cylinder that constitutes the fine bubble water generator 33-2 Water inlet face of the fine bubble water generator 33-3 Water outlet body that constitutes the fine bubble water generator 33-4 Spiral unevenness formed on the inner surface of the cylinder 36 Branch holes provided in the water inlet faceplate 37 Branch holes provided in the flood face

Claims

1. A shower head having a shower discharge surface that is connected to a shower hose and can discharge showers in a plurality of shower discharge patterns, A switching lever for selecting one of a plurality of water discharge patterns for water discharged from the shower water discharge surface; a gripping portion that grips the shower head, The handle comprises a handle on the water inlet side connected to the water inlet of the shower head, which is connected to the water supply port of the shower hose, and a handle on the shower head side connected to the water discharge surface, The grip portion on the water inlet side and the grip portion on the shower discharge surface side are formed separable by being screwed together, The handle on the water inlet side removably houses a fine bubble water generator and a cylindrical silver ion water generating cartridge containing silver ion glass particles that release silver ions into the water when they come into contact with the water supplied from the water inlet. This showerhead is characterized in that water that has passed through the fine bubble water generator and the silver ion water generating cartridge is supplied to the shower water discharge surface side through an internal water passage provided inside the grip part on the shower water discharge surface side.

2. A shower head having a shower water discharge surface that can be connected to a shower hose to discharge one or more showers of water discharge patterns, and a jet water outlet that discharges a jet of water with a narrowed water flow from the front vertical direction of the shower water discharge surface, A switching lever for selecting one of a plurality of shower discharge modes for discharging water from the shower discharge surface; a water discharge switch for switching between shower water discharge from the shower water discharge surface and jet water discharge from the jet water discharge port; a gripping portion that grips the shower head, The handle comprises a handle on the water inlet side connected to the water inlet of the shower head, which is connected to the water supply port of the shower hose, and a handle on the shower head side connected to the water discharge surface, The grip portion on the water inlet side and the grip portion on the shower discharge surface side are formed separable by being screwed together, The handle on the water inlet side removably houses a fine bubble water generator and a cylindrical silver ion water generating cartridge containing silver ion glass particles that release silver ions into the water when they come into contact with the water supplied from the water inlet. This showerhead is characterized in that water that has passed through the fine bubble water generator and the silver ion water generating cartridge is supplied to the shower water discharge surface side through an internal water passage provided inside the grip part on the shower water discharge surface side.

3. The showerhead of claim 2 , wherein the silver ion glass particles include at least silver oxide and boron oxide.

4. The showerhead described in claim 3, characterized in that a water-passing cap consisting of a circular plate with multiple holes is fitted to both sides of the cylindrical silver ion water generating cartridge, and the silver ion glass particles are contained within the cylindrical silver ion water generating cartridge in a confined state.

5. The shower head according to claim 1 or 2, wherein the switching lever is provided on the grip side of the shower head.

6. The shower head of claim 2, wherein the water discharge switch is provided on the back side of the shower head.

7. The fine bubble water generator comprises: a cylindrical body that is in close contact with the inner surface of the grip portion of the shower head; a water inlet face having four branch holes formed concentrically at a predetermined distance from the central axis of the cylinder for supplying tap water; and a water outlet body having four branch holes for flowing tap water out of the cylindrical body, The cylindrical body is inserted into the inner surface of the handle of the shower head and fixed together with a shower head side water inlet which constitutes a coupler joint type joint that can be detachably connected to a water inlet of a shower hose that supplies water to the shower head, The inner wall of the cylindrical body between the water inlet body and the water outlet body is formed with uneven portions formed by spiral cuts, The water flowing in from the four branch holes of the water inlet face comes into contact with and collides with the spiral unevenness, causing turbulence within the cylinder, which then finely crushes the bubbles in the tap water and causes fine bubble water to flow out of the water outlet face. The showerhead according to claim 1 or 2.

8. 8. The showerhead of claim 7, wherein the four branch holes provided in the water inlet face are arranged at equal intervals at positions equidistant from the central axis of the water inlet face, and the central axis extending from the water inlet side to the water outlet side is inclined at a predetermined angle relative to the central axis of the water inlet face.

9. 9. The showerhead of claim 8, wherein the central positions of the branch holes in the water inlet and outlet bodies are offset by a predetermined angle so as not to coincide when viewed from the direction of water flow from the water inlet body to the water outlet body.

10. 10. The showerhead according to claim 9, wherein the cylindrical body is made of brass, stainless steel, or resin.

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