Shower head

Abstract

To provide a shower head in which a pure water cartridge and a flow passage member can be assembled in flow passage connection inside the grip part of the housing.SOLUTION: A shower head 1 includes: a housing 10 which has a head part 11 to be a spray part and a grip part 12 which cylindrically extends from the head part 11; and a cylindrical flow passage member 20 which is assembled into the housing 10. The flow passage member 20 is provided with a head side flow passage 21 that is fastened in the head part 11 and that extends into the grip part 12 and with a grip side flow passage 22 that is flow passage-connected to the head side flow passage 21 from the proximal end side in the cylindrical axial direction inside the grip part 12. The shower head 1 is further equipped with: a pure water cartridge 40 which is set in a flow passage-connected state in the cylindrical axial direction between the head side flow passage 21 and the grip side flow passage 22; and a clip CL which is fitted in a through hole 12B formed in the cylindrical wall of the grip part 12 and which retains the grip side flow passage 22 for the grip part 12.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a showerhead, specifically to a showerhead that includes a housing that includes a head portion that serves as a spray section and a grip portion that extends cylindrically from the peripheral wall of the head portion, and a cylindrical flow path member that is incorporated inside the housing and forms a flow path for hot and cold water. [Background technology]

[0002] Patent Document 1 discloses a shower head for use in a bathroom. This shower head comprises a housing with a head section and a grip section, and a flow path member that is incorporated into the housing and forms a flow path for hot and cold water. The flow path member is divided into a head-side flow path section that is provided in the head section of the housing, and a grip-side flow path section that is provided in the grip section.

[0003] The head-side flow passage portion is inserted into the head portion of the housing from an opening before the sprinkler plate is attached, and fixed in the head portion. The grip-side flow passage portion is inserted into the grip portion of the housing from an opening on the base end side, and is connected to the head-side flow passage portion by being screwed into the grip portion, and fixed in the grip portion. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6470943 Summary of the Invention [Problem to be solved by the invention]

[0005] When considering a configuration in which a water purification cartridge is installed between the head-side flow path section and the grip-side flow path section, there is a risk that these will be difficult to install. Therefore, the present invention provides a showerhead that makes it possible to install the water purification cartridge and flow path member in a state where the flow paths are properly connected within the grip section of the housing. [Means for solving the problem]

[0006] In order to solve the above problems, the showerhead of the present invention has the following means. That is, the showerhead comprises a housing including a head portion serving as a spray unit and a grip portion extending cylindrically from the peripheral wall of the head portion, and a cylindrical flow path member incorporated inside the housing to form a flow path for hot and cold water. The flow path member has a head-side flow path fixed inside the head portion and extending into the grip portion, and a grip-side flow path that is directly or indirectly flow-connected to the head-side flow path in the grip portion from a base end side in the cylindrical axis direction. The showerhead further comprises a water purification cartridge that is set between the head-side flow path and the grip-side flow path in a state of flow-connection in the cylindrical axis direction, and a locking member that is fitted into a through hole formed in the cylindrical wall of the grip portion from the outside in the cylindrical diameter direction and engages with the grip-side flow path in a state that restricts movement in the cylindrical axis direction relative to the grip portion.

[0007] According to the above configuration, the water purification cartridge can be provided in a state where the head-side flow path fixed to the head part of the housing and the grip-side flow path that is directly or indirectly connected to the head-side flow path in the grip part and prevented from coming off by the locking member are appropriately connected in the axial direction of the cylinder. Therefore, the water purification cartridge and the flow path member can be assembled in the grip part of the housing in a state where they are appropriately connected in the flow path.

[0008] The showerhead of the present invention may be further configured as follows: The head-side flow path and / or the grip-side flow path have a recessed fitting recess into which the water purification cartridge can be fitted in the axial direction to connect the flow paths.

[0009] According to the above configuration, the water purification cartridge can be assembled in a state where it is more simply and appropriately connected to the head-side flow path and / or the grip-side flow path. In addition, when the grip-side flow path is directly connected to the head-side flow path or indirectly connected to the head-side flow path via the water purification cartridge, the water purification cartridge can be fitted into the fitting recess, and the assembly can be easily performed with the water purification cartridge temporarily held in the fitting recess.

[0010] The showerhead of the present invention may further be configured as follows: The head-side flow path and the grip-side flow path are directly connected to each other by fitting an outer tubular part extending from one of them in the axial direction onto the outer periphery of the other, and a water purification cartridge is provided in the connected flow path.

[0011] According to the above configuration, the head side flow path and the grip side flow path are directly connected by flow paths, so that it is possible to provide a water purification flow path that passes through the water purification cartridge and another flow path that passes outside the water purification cartridge between them.

[0012] The showerhead of the present invention may further be configured as follows: the grip portion extends straight in the axial direction of the cylinder from the peripheral wall of the head portion at an angle in a bent shape, and the outer cylinder portion is formed in the grip-side flow path.

[0013] According to the above configuration, by forming an outer tube portion in the grip side flow path that passes through the grip portion that extends straight in the tubular axis direction, the grip side flow path can be passed smoothly through the grip portion even in the presence of the outer tube portion.

[0014] The showerhead of the present invention may be further configured as follows: The outer tubular portion has a diameter dimension that fits into the tubular wall of the grip portion with the gap in the tubular diameter direction narrowed. With the above configuration, the outer tubular portion can suppress rattling of the head-side flow path and the grip-side flow path relative to the grip portion in the tubular diameter direction.

[0015] The showerhead of the present invention may be further configured as follows: The grip-side flow path has a protruding portion at a portion that does not overlap with the water purification cartridge in the axial direction of the cylinder, the protruding portion fitting into the cylindrical wall of the grip portion in a state where the gap in the axial direction of the cylinder is filled. The locking member engages with the protruding portion.

[0016] According to the above configuration, the protruding portion can more appropriately suppress rattling of the grip-side flow passage relative to the grip portion in the tube diameter direction. Also, since the protruding portion does not overlap with the water purification cartridge in the tube axis direction, it is possible to fit the locking member deeper into the protruding portion from the outside in the tube diameter direction to engage with it.

[0017] The showerhead of the present invention may be further configured as follows: the grip-side flow path has a terminal engagement portion that engages with a base-end terminal of the grip portion in the axial direction. The terminal engagement portion has an annular terminal mating portion that projects outward from the base-end terminal of the grip portion and is brought into contact with the base-end terminal along the entire circumference in the axial direction, and a terminal fitting portion that fits into the cylindrical wall of the base-end terminal of the grip portion in a state where a gap in the axial direction is filled.

[0018] According to the above configuration, the terminal engagement portion of the grip-side flow passage can be exposed from the terminal on the base end side of the grip portion in a shape that looks integrated with the grip portion and has a good appearance.

[0019] The showerhead of the present invention may further be configured as follows: An uneven structure is provided between an outer peripheral wall on the base end side in the axial direction of the grip-side flow path and an inner peripheral wall on the base end side in the axial direction of the grip portion, which fit together in the axial direction of the cylinder to restrict rotation of the grip-side flow path in the circumferential direction of the cylinder with respect to the grip portion.

[0020] According to the above-described configuration, the grip-side flow passage can be assembled to the grip portion in a state in which it is appropriately prevented from rotating. [Brief description of the drawings]

[0021] [Figure 1]1 is a perspective view illustrating an overall configuration of a shower head according to a first embodiment. [Diagram 2] FIG. 2 is a partial cross-sectional perspective view showing the internal structure of the shower head. [Diagram 3] FIG. 3 is a cross-sectional view corresponding to FIG. 2. [Figure 4] FIG. 2 is an exploded perspective view of the shower head. [Diagram 5] FIG. 5 is an exploded perspective view of FIG. 4 as viewed from the opposite side. [Figure 6] FIG. 4 is a cross-sectional view illustrating a state before internal parts are assembled into a housing. [Figure 7] 4 is a cross-sectional view showing a state in which a head-side flow passage is assembled in a head portion of a housing. FIG. [Figure 8] 13 is a cross-sectional view showing the state in which the water purification cartridge is fitted into the fitting recess of the grip-side flow path. FIG. [Figure 9] 11 is a cross-sectional view showing a state in which a grip-side flow passage is connected to a head-side flow passage portion. FIG. [Figure 10] FIG. 4 is an enlarged view of a portion X in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0023] First Embodiment (Schematic configuration of shower head 1) First, the configuration of a showerhead 1 according to a first embodiment of the present invention will be described with reference to Figures 1 to 10. In the following description, when directions such as front, back, top, bottom, left, and right are indicated, they refer to the respective directions shown in each figure.

[0024] The directions shown in each figure are those seen by a user standing in front of the showerhead 1. In the following description, when no specific reference figure is given or no reference number is given to a reference figure, any of Figures 1 to 10 will be referred to as appropriate.

[0025] As shown in Figure 1, the showerhead 1 according to this embodiment is configured as a water spraying device that is detachably mounted on the wall of a bathroom (not shown). The showerhead 1 is connected to a shower device installed in the bathroom via a shower hose (not shown). The showerhead 1 takes in hot water discharged from the shower device and sprays it toward the user from a water spray plate 30 attached to the front of the head, dispersing the hot water widely.

[0026] The showerhead 1 comprises a resin housing 10 that serves as its exterior component, a resin flow path member 20 (see Figures 2 and 3) that is fitted inside the housing 10, and a disk-shaped resin spray plate 30 that is attached to the head portion 11 of the housing 10. The showerhead 1 also comprises a cylindrical water purification cartridge 40 that is fitted inside the flow path member 20, and an ultra-fine bubble generator 50 that is made up of a plurality of disks stacked one on top of the other.

[0027] 4, housing 10 integrally comprises head portion 11 in the shape of a shallow cylindrical container with a circular installation opening 11A into which spray plate 30 can be installed from the front side, and grip portion 12 extending cylindrically downward in the figure from the peripheral wall of head portion 11. Grip portion 12 functions as a grip when a user holds showerhead 1 in their hand.

[0028] The grip portion 12 is configured such that a vertically long extended opening 12A connected to the assembly opening 11A of the head portion 11 is formed on the front side wall of the tip side (upper end side in the figure) connected to the head portion 11. The extended opening 12A is configured to be a vertically long wide opening connected to the assembly opening 11A, so that when the head side flow passage 21 of the flow passage member 20 described later is assembled inside the housing 10, the head side flow passage 21 can be widely received between the assembly opening and the extended opening 12A. When the head side flow passage 21 is assembled, a resin cap 13 assembled together with the head side flow passage 21 is attached to the extended opening 12A in a manner that closes the inside of the opening. As a result, the extended opening 12A is closed in a manner that looks good from the outside (see Figs. 2 to 3).

[0029] 2 and 3, the flow path member 20 is configured to be divided into two parts: a cylindrical head-side flow path 21 fixed inside the head portion 11 of the housing 10, and a cylindrical grip-side flow path 22 inserted into the grip portion 12 from an opening on the base end side (the lower end side in the figure) and connected to the head-side flow path 21. Specifically, the grip-side flow path 22 is inserted into the grip portion 12 and connected to the head-side flow path 21 as follows.

[0030] First, as shown in Fig. 8, the tubular portion of the water purification cartridge 40 at the lower end side (upstream side) is inserted and set in the grip-side flow path 22 before being inserted into the grip part 12. Next, the grip-side flow path 22 together with the water purification cartridge 40 is inserted into the grip part 12 from the opening on the base end side and inserted into the connecting tubular portion 21A of the head-side flow path 21. Thereby, as shown in Fig. 9, the outer tubular portion 22B of the grip-side flow path 22 is fitted into the outer periphery of the connecting tubular portion 21A of the head-side flow path 21, and the grip-side flow path 22 and the head-side flow path 21 are directly connected to each other.

[0031] Also, the tubular portion at the upper end side (downstream side) of the water purification cartridge 40 in the figure is fitted into the connecting tubular portion 21A of the head side flow path 21. As a result, the water purification cartridge 40 is set in a form interposed within a connecting flow path in which the head side flow path 21 and the grip side flow path 22 are directly flow-connected, and is in a state of flow path connection in the tubular axial direction to the head side flow path 21 and the grip side flow path 22. Here, the "tubular axial direction" refers to the direction in which the tube of the grip side flow path 22 extends.

[0032] After the grip-side flow passage 22 is inserted, the clip CL is fitted into the through hole 12B formed in the inner wall of the base end side of the grip portion 12 of the housing 10, and the clip CL is engaged with the grip-side flow passage 22. As a result, as shown in Fig. 10, the grip-side flow passage 22 is fixed in a state in which its movement in the axial direction is restricted relative to the grip portion 12 and it is prevented from coming off. Here, the clip CL corresponds to the "locking member" of the present invention.

[0033] In this way, even if the flow path member 20 is divided into two parts, the head side flow path 21 and the grip side flow path 22, they can be easily assembled in a state of flow path connection inside the housing 10. Moreover, the flow path member 20 is configured so that by assembling the grip side flow path 22 to the head side flow path 21, the water purification cartridge 40 can also be set in a state of appropriate flow path connection between them. Moreover, the flow path member 20 is configured so that the grip side flow path 22 can be easily removed from the connected state with the head side flow path 21 by pulling out the clip CL fitted in the grip part 12. Moreover, the flow path member 20 is configured so that by removing the grip side flow path 22, the water purification cartridge 40 fitted in the grip side flow path 22 can also be easily removed from the grip part 12.

[0034] (Configuration of each part of shower head 1) Below, we will explain in detail the specific configuration of each part of the showerhead 1. As shown in Figures 4 and 5, in addition to the above-mentioned housing 10, flow path member 20, spray plate 30, water purification cartridge 40, and ultra-fine bubble generator 50, the showerhead 1 further comprises a resin elbow 60, a resin switching shaft 70, and a resin switching body 80.

[0035] (Housing 10) The housing 10 includes the shallow cylindrical container-shaped head portion 11 described above, and a cylindrical grip portion 12 extending downward in the figure from the peripheral wall on the lower end side in the figure of the head portion 11. The housing 10 also includes a curved plate-shaped cap 13 attached to close an extended opening 12A formed in the grip portion 12.

[0036] As shown in Fig. 4, the head portion 11 is in the form of a cylindrical container with an assembly opening 11A that opens in a perfect circle toward the front side in the figure. The grip portion 12 is in the form of a cylinder that extends straight from the head portion 11 at an angle in a bent shape so that it extends diagonally from the peripheral wall of the lower end side of the head portion 11 toward the front downward in the figure. The grip portion 12 is in the form of a cylindrical body that extends in the axial direction of the cylinder with a constant wall thickness. The grip portion 12 is in the form of a through hole in the axial direction so that the inside of the cylinder and the inside of the container of the head portion 11 are in communication with each other.

[0037] The extended opening 12A formed in the grip portion 12 is formed across a wall area that extends in the left-right direction from the peripheral wall on the base side that is connected to the grip portion 12 of the head portion 11. As a result, the extended opening 12A is formed to have a wide vertical opening that is connected to the assembly opening 11A, and the portion facing the assembly opening 11A is formed to form a wide receiving port, making it possible to easily incorporate the head-side flow path 21 inside.

[0038] The cap 13 is formed in a curved plate shape that matches the shape of the extended opening 12 A. As shown in Figures 6 to 7, the cap 13 is fastened to the head side flow passage 21 with a set screw S1 (see Figure 5) to form a unit, and is configured to be assembled to the housing 10 together with the head side flow passage 21.

[0039] Specifically, as the head-side flow passage 21 is assembled into the head portion 11 of the housing 10, the cap 13 is set in such a way that a claw 13B formed on an edge on the lower end side in the drawing is hooked from the inner circumferential side onto an edge facing the extended opening 12A of the grip portion 12, thereby covering the extended opening 12A. The cap 13 is held in a state in which it is fixed integrally to the housing 10 via the head-side flow passage 21, as the head-side flow passage 21 is fixed into the head portion 11 via an elbow 60 described later. The cap 13 is set in such a way that it closes the extended opening 12A without any gaps, and is provided in such a way that it smoothly connects to the cylindrical wall of the adjacent grip portion 12 and the peripheral wall of the head portion 11 without any steps.

[0040] (Flow path member 20) 2 and 3, the flow path member 20 includes a cylindrical head-side flow path 21 that is set in the head portion 11 of the housing 10 described above, and a cylindrical grip-side flow path 22 that is inserted into the grip portion 12 from an opening on the base end side and connected to the head-side flow path 21. The head-side flow path 21 includes a cylindrical connecting tube portion 21B that is connected to an elbow 60 described below and is fixed in the head portion 11, and a cylindrical connecting tube portion 21A that extends from the connecting tube portion 21B into the grip portion 12 in a bent shape.

[0041] The head-side flow path 21 is configured to have an insertion recess 21C into which the tubular portion of the water purification cartridge 40 at the upper end side (downstream side) in the figure can be inserted from below in the axial direction of the tube into the tubular connection tubular portion 21A extending into the grip portion 12 to connect the flow path. The insertion recess 21C is configured to form a cylindrical concave surface with an inner diameter slightly larger than the outer diameter of the tubular wall portion of the water purification cartridge 40, and is configured to allow the water purification cartridge 40 to be set with a gap in the tubular diameter direction.

[0042] The water purification cartridge 40 is configured such that a thick diameter portion 41 that bulges in a partially annular shape is formed on the outer periphery of the middle portion that is fitted into the connecting tube portion 21A of the head side flow path 21. The thick diameter portion 41 functions as a gap filling portion that fills the gap between the connecting tube portion 21A of the head side flow path 21 in the tube diameter direction. The thick diameter portion 41 fills the gap between the connecting tube portion 21A and the thick diameter portion 41, thereby suppressing the flow rate of hot and cold water that flows through the outside of the water purification cartridge 40 without passing through the inside of the water purification cartridge 40, among the hot and cold water that flows from the grip side flow path 22 to the head side flow path 21. Therefore, by adjusting the gap between the thick diameter portion 41 and the connecting tube portion 21A, the flow rate of hot and cold water that flows through the outside of the water purification cartridge 40 can be appropriately adjusted.

[0043] The fitting recess 21C of the head side flow path 21 is recessed in the axial direction, and a circular step portion 21D is formed on the periphery of the fitting recess 21C, which narrows the diameter of the cylinder in a step-like manner over the entire circumference. The fitting recess 21C is configured to hold the water purification cartridge 40 in a centered position on the central axis inside the cylinder by fitting the tip portion of the water purification cartridge 40 in the axial direction into a reduced diameter portion surrounded by the step portion 21D. The step portion 21D has an inner diameter that gently fits the tip portion of the water purification cartridge 40 in the axial direction. Therefore, when the grip side flow path 22 is pulled out of the grip portion 12 in the gravitational direction, the water purification cartridge 40 is pulled out together with the grip side flow path 22 to the outside without being held by the step portion 21D.

[0044] The head-side flow passage 21 is set in the head portion 11 of the housing 10 by the following procedure. First, the cap 13 is attached integrally to the head-side flow passage 21. Specifically, as shown in FIG. 5, each of the cylindrical female thread tubes 13A protruding from each corresponding position on the inner peripheral surface of the cap 13 is abutted from the front side to each of the fin portions 21E protruding from the left and right side walls of the connecting tube portion 21B of the head-side flow passage 21. Then, a set screw S1 is inserted from each of the fin portions 21E side to integrally fasten the female thread tubes 13A. As a result, the cap 13 is attached integrally to the head-side flow passage 21.

[0045] In addition to attaching the cap 13, the multiple disks constituting the ultra-fine bubble generator 50 are set in the connecting tube portion 21B of the head side flow path 21 in a state where they are overlapped in the cylindrical axis direction. Furthermore, the connecting tube portion 61 of the elbow 60 is inserted into the connecting tube portion 21B of the head side flow path 21 to connect the flow paths. As a result, as shown in Fig. 6, the disks constituting the ultra-fine bubble generator 50 are set in a state where they are overlapped in the cylindrical axis direction in the connecting tube portion 21B of the head side flow path 21 by attaching the elbow 60. Furthermore, the head side flow path 21, the cap 13, and the elbow 60 are assembled together in an integrated unit state.

[0046] After the above assembly, the connecting tube portion 21A of the head-side flow path 21 is inserted into the grip portion 12 from a vertically long opening consisting of the assembly opening 11A and the extended opening 12A of the housing 10, and the claw 13B of the cap 13 is hooked onto the edge facing the extended opening 12A of the grip portion 12. Then, in conjunction with the above assembly, the elbow 60 is inserted into the head portion 11 from the assembly opening 11A of the housing 10, and the cylindrical fitting protrusion 63 protruding from the inner wall of the bent portion of the elbow 60 is fitted into the cylindrical fitting tube 11B protruding from the center of the bottom plate of the cylindrical container of the head portion 11.

[0047] 7, the head-side flow path 21, the cap 13, and the elbow 60 are held in a state where they are integrally assembled to the housing 10. With the above assembly, the head-side flow path 21 has the downstream connecting tubular portion 21B fixed inside the head portion 11 via the elbow 60. Also, the head-side flow path 21 is held in a centered state in which the upstream connecting tubular portion 21A enters the cylindrical interior of the grip portion 12 and extends straight in the cylindrical axial direction inside the grip portion 12 along a position on the central axis inside the cylindrical interior.

[0048] 2 and 3, the grip-side flow path 22 includes a cylindrical connecting tube portion 22A that is connected to the connecting tube portion 21A of the head-side flow path 21 inside the grip portion 12 of the housing 10, and an outer tube portion 22B that is one size larger than the connecting tube portion 22A and extends concentrically in the tube axis direction from the tip (upper end in the figure) of the connecting tube portion 22A. The connecting tube portion 22A has a cylindrical shape with approximately the same outer diameter and inner diameter as the connecting tube portion 21A of the head-side flow path 21.

[0049] 8, the grip-side flow path 22 is inserted into the cylindrical interior of the grip portion 12 from the tip side where the outer cylindrical portion 22B is formed, and the connecting cylindrical portion 21A of the head-side flow path 21 is fitted into the cylindrical interior of the outer cylindrical portion 22B. By the above insertion, the grip-side flow path 22 is connected in a state where the outer cylindrical portion 22B is in close contact with the connecting cylindrical portion 21A of the head-side flow path 21 over the entire circumference via an O-ring (not shown) attached to the outer periphery of the connecting cylindrical portion 21A of the head-side flow path 21. As a result, the connecting cylindrical portion 22A of the grip-side flow path 22 and the connecting cylindrical portion 21A of the head-side flow path 21 are connected to each other in a manner that they communicate with each other in the cylindrical axis direction.

[0050] The outer tube portion 22B has an outer diameter that allows it to be inserted into the inside of the tube of the grip portion 12 and fit into the grip portion 12 without creating any gap in the tube diameter direction. Therefore, by fitting the outer tube portion 22B of the grip-side flow path 22 into the connecting tube portion 21A of the head-side flow path 21, both the outer tube portion 22B and the connecting tube portion 21A of the head-side flow path 21 are in a state in which rattling in the tube diameter direction relative to the grip portion 12 is suppressed.

[0051] The grip-side flow path 22 is configured to have an insertion recess 22C inside the connecting tube portion 22A, into which the tube portion of the water purification cartridge 40 at the lower end side (upstream side) shown in the figure can be inserted from above in the axial direction of the tube to connect the flow path. The insertion recess 22C is configured to form a cylindrical concave surface with an inner diameter slightly larger than the outer diameter of the tube wall portion of the water purification cartridge 40, and is configured to allow the water purification cartridge 40 to be set with a gap in the tube diameter direction.

[0052] The water purification cartridge 40 is configured such that base end projections 42 of the same shape that protrude in an upright shape are formed at four positions in the circumferential direction on the outer periphery of the base end (lower end in the figure). The water purification cartridge 40 is also configured such that intermediate projections 43 of the same shape that protrude in a hemispherical shape are formed at four positions in the circumferential direction on the outer periphery of the middle part that is fitted into the connecting cylinder part 22A of the grip-side flow path 22.

[0053] When the water purification cartridge 40 is fitted into the connecting tube portion 22A of the grip-side flow path 22, the base end projection 42 and the intermediate projection 43 are fitted in a state in which there is almost no gap in the tube diameter direction with respect to the connecting tube portion 22A. Therefore, by fitting the water purification cartridge 40 into the connecting tube portion 22A of the grip-side flow path 22, the water purification cartridge 40 can be set in a centered position with respect to the connecting tube portion 22A of the grip-side flow path 22 without rattling in the tube diameter direction.

[0054] An annular step portion 22D that narrows the diameter of the cylinder in a stepped manner around the entire circumference is formed on the periphery of the end of the fitting recess 22C of the grip-side flow path 22 that is recessed in the axial direction. When the water purification cartridge 40 is inserted into the connecting cylinder portion 22A of the grip-side flow path 22, the step portion 22D abuts against each base end protrusion 42 of the water purification cartridge 40 in the axial direction, and functions as a restricting portion that restricts the insertion position of the water purification cartridge 40.

[0055] 9, the grip-side flow path 22 is configured such that a protruding portion 22F that protrudes in an annular shape and expands in diameter is formed on a base portion 22E that is fitted into the inside of a cylinder at the base end (lower end in the figure) of the grip portion 12. The base portion 22E on which the protruding portion 22F is formed is formed at a position spaced apart in the axial direction (downward in the figure) from the fitting recess 22C into which the water purification cartridge 40 is fitted. Therefore, the base portion 22E is formed at a position that does not overlap with the water purification cartridge 40 in the axial direction.

[0056] The protruding portion 22F protruding from the base portion 22E is annular and has the same outer diameter as the outer tube portion 22B. Therefore, by inserting the protruding portion 22F into the cylindrical interior of the grip portion 12, the protruding portion 22F is fitted to the grip portion 12 in a state in which there is almost no gap in the cylindrical diameter direction, and is set in a state in which rattling in the cylindrical diameter direction is suppressed relative to the grip portion 12. A locking groove 22G recessed in an annular shape over the entire circumference is formed in the middle portion in the cylindrical axis direction of the protruding portion 22F.

[0057] The locking groove 22G is set in a state where the arrangement in the cylinder axis direction overlaps with the through hole 12B formed in the rear wall of the grip portion 12 by inserting the grip-side flow path 22 into the cylinder interior of the grip portion 12. The locking groove 22G has a groove width in the cylinder axis direction that is substantially the same shape as the hole width in the cylinder axis direction of the through hole 12B. After the grip-side flow path 22 is inserted, the locking groove 22G is set in a state where the clip CL made of resin is inserted into the through hole 12B from the outside, so that the clip CL is fitted inside the groove (see FIG. 10). As a result, the grip-side flow path 22 is fixed in a state where it is restricted from moving in the cylinder axis direction relative to the grip portion 12 and is prevented from coming off.

[0058] 4 and 5, the clip CL has an open ring-shaped groove fitting portion CL1 that fits into the locking groove 22G, and a plate-shaped hole fitting portion CL2 that fits into the through hole 12B of the grip portion 12. After the grip-side flow path 22 is inserted into the grip portion 12, the clip CL is inserted into the through hole 12B of the grip portion 12 from the outside, so that the groove fitting portion CL1 is elastically fitted into the groove of the locking groove 22G and snap-fitted in a state where it is prevented from coming off. Specifically, the groove fitting portion CL1 having an open ring shape elastically fits into the groove of the locking groove 22G in a form that sandwiches the cylindrical wall of the grip-side flow path 22 in the left-right direction.

[0059] Then, together with the above fitting, the hole fitting portion CL2 fits into the through hole 12B of the grip portion 12 so as to close the through hole 12B, and is set in a state in which the outer surface is flush with the outer circumferential surface of the grip portion 12. The groove fitting portion CL1 has a shape having a thickness in the axial direction that allows it to be fitted into the locking groove 22G in a state in which there is almost no gap in the axial direction.

[0060] Moreover, the hole fitting portion CL2 has a shape having a thickness in the cylindrical axis direction and a width that allows the hole fitting portion CL2 to fit into the through hole 12B without creating any gap in the cylindrical axis direction and the lateral direction, respectively. Therefore, by fitting the groove fitting portion CL1 and the hole fitting portion CL2 of the clip CL into the locking groove 22G and the through hole 12B, respectively, the movement of the grip-side flow path 22 in the cylindrical axis direction relative to the grip portion 12 is appropriately restricted via the clip CL attached between them (see FIG. 10).

[0061] 10, the grip-side flow path 22 further includes a terminal engagement portion 22H extending downward (in the axial direction) from the base portion 22E. When the grip-side flow path 22 is inserted into the tubular interior of the grip portion 12, the terminal engagement portion 22H is brought into contact with the terminal on the base end side (lower end side in the figure) of the grip portion 12 in the axial direction and engaged in an exposed state to the outside.

[0062] Specifically, the terminal engagement portion 22H has a terminal mating portion H1 that protrudes in an annular shape with an increased diameter, and a terminal fitting portion H2 that is recessed in a stepped shape with a reduced diameter along the upper edge of the terminal mating portion H1 in the figure. The terminal mating portion H1 is formed in an annular shape with an outer diameter that is slightly smaller than but substantially the same as the outer diameter of the cylindrical wall of the grip portion 12.

[0063] The end fitting part H1 abuts against the terminal on the base end side (lower end side in the figure) of the grip part 12 in the cylindrical axis direction by inserting the grip-side flow path 22 into the grip part 12. This abutment causes the end fitting part H1 to restrict movement of the grip-side flow path 22 in the cylindrical axis direction relative to the grip part 12. The end fitting part H1 is set in a state where there is almost no gap in the cylindrical axis direction with respect to the terminal on the base end side of the grip part 12 by inserting the grip-side flow path 22 into the cylindrical interior of the grip part 12 to a position where the arrangements of the locking groove 22G and the through hole 12B in the cylindrical axis direction overlap (a position fixed by the clip CL).

[0064] The terminal fitting portion H2 is fitted into a terminal recess 12C whose inner circumferential surface is enlarged in an annular shape, formed inside the cylinder at the base end side (lower end side in the figure) of the grip portion 12, by inserting the grip-side flow path 22 into the grip portion 12. The terminal recess 12C has an inner circumferential surface whose inner diameter is enlarged more than the inner diameter of the other inner circumferential surfaces of the grip portion 12. The terminal fitting portion H2 has an outer diameter that fits into the terminal recess 12C in a state where there is almost no gap in the cylinder diameter direction. Therefore, by fitting the terminal fitting portion H2 into the terminal recess 12C, the terminal engagement portion 22H is set in a state where rattling in the cylinder diameter direction is suppressed relative to the grip portion 12.

[0065] As shown in Fig. 4, the terminal engagement portion 22H has terminal projections H3 projecting from two opposing positions in the circumferential direction of the cylinder on the upper surface of the terminal mating portion H1 in the drawing. Each terminal projection H3 is configured as a pair of projecting plates spaced apart in the circumferential direction of the cylinder. When the grip-side flow path 22 is inserted into the grip portion 12, each terminal projection H3 fits into a corresponding locking projection 12D (see Fig. 5) formed to project from a corresponding position inside the cylinder on the base end side (lower end side in the drawing) of the grip portion 12.

[0066] Specifically, the terminal projections H3 engage with the locking projections 12D formed inside the cylinder on the base end side of the grip portion 12 between the protruding plates. This restricts the terminal engagement portion 22H from rotating in the circumferential direction relative to the grip portion 12. Thus, by carrying out the above series of assembly, the grip-side flow path 22 is fixed in a state in which it does not move in the axial direction or the circumferential direction (rotational direction) relative to the grip portion 12. Here, the recessed and protruding fitting structure formed by the terminal projections H3 and the locking projections 12D corresponds to the "recessed and protruding structure" of the present invention.

[0067] 10, the grip-side flow passage 22 further includes a male threaded tube 22J extending in the axial direction from the lower end of the terminal engagement portion 22H. An end of a shower hose extending from a shower device (not shown) is screwed into the male threaded tube 22J to connect the flow passage.

[0068] (Water Purification Cartridge 40) The water purification cartridge 40 is made of a cylindrical member filled with granular calcium sulfite as a filter medium. As shown in Figures 2 and 3, the water purification cartridge 40 is assembled into the flow path member 20 by the above-mentioned procedure, and takes in a portion of the hot and cold water flowing from the grip-side flow path 22 to the head-side flow path 21 into the inside of the cartridge from the base end side (the lower end side in the figure) in the cylindrical axis direction.

[0069] As a result, the water purification cartridge 40 dissolves minute amounts of calcium sulfite into the hot water taken in, and removes residual chlorine contained in the hot water by reacting with the sulfite ions. Calcium sulfite has a fast reaction rate with residual chlorine, and is therefore characterized by its ability to properly purify hot water while maintaining the flow rate of the hot water flowing inside.

[0070] The water purification cartridge 40 is designed so that a portion of the hot water flowing inside it leaks out through the cylinder walls to the outside of the cylinder. As a result, the hot water flowing from the grip side flow path 22 through the gap between the cylinder walls to the head side flow path 21 without passing through the inside of the water purification cartridge 40 is mixed with the hot water in which calcium sulfite has dissolved and leaked from inside the water purification cartridge 40, so that the hot water that does not pass through the water purification cartridge 40 is also properly purified.

[0071] (Ultra Fine Bubble Generator 50) The ultra-fine bubble generator 50 is composed of a cylindrical laminated member in which circular disks, each having a plurality of blade surfaces extending radially inside, are stacked in an overlapping manner in the cylindrical axial direction. The ultra-fine bubble generator 50 is set in a state where the disks are stacked in the cylindrical axial direction in the connecting cylindrical portion 21B of the head-side flow path 21 described above. In this way, the ultra-fine bubble generator 50 takes in hot water flowing from the head-side flow path 21 through the narrow gaps between the blade surfaces of each disk, and causes the hot water to collide with each blade surface while increasing the flow rate of the hot water.

[0072] As a result, the ultra-fine bubble generator 50 varies the water pressure of the hot water to generate bubbles inside. Furthermore, the ultra-fine bubble generator 50 shears the bubbles by colliding the hot water with the blade surface, generating bubbles of less than 1 μm inside the hot water. Note that the ultra-fine bubble generator 50 has the same configuration as the publicly known configuration disclosed in JP 2020-171914 A, so a detailed description of the configuration is omitted.

[0073] (Other components) As shown in Figs. 2 and 3, the elbow 60 is made of a resin tubular member molded into an L-shape. The elbow 60 is connected to the flow path by inserting the connection tube portion 21B of the head-side flow path 21 into one of the cylindrical connection tube portions 61. As described above in Fig. 7, the elbow 60 is assembled to the center of the bottom plate of the head portion 11 by fitting the cylindrical fitting protrusion 63 protruding from the inner wall of the bent portion into the cylindrical fitting tube 11B protruding from the center of the bottom plate of the cylindrical container of the head portion 11. By the above assembly, the elbow 60 is set in a state in which the other cylindrical connection tube portion 62 is oriented straight toward the front side of the figure, which is the opening direction of the head portion 11, at the center of the head portion 11.

[0074] 2 and 3, the switching shaft 70 includes a cylindrical main body shaft 71 and a shaft fixing plate 72 that extends in a disk-like shape in the radial direction centered on the main body shaft 71. A separate outer peripheral ring 73 is attached to the outer periphery of the switching shaft 70 so as to project cylindrically from the outer periphery along the outer periphery. As shown in FIG. 7, the switching shaft 70 is assembled into the head portion 11 through an assembly opening 11A of the head portion 11 after the elbow 60 is set in the head portion 11.

[0075] Specifically, the switching shaft 70 is assembled into the head portion 11 as follows. First, the tube portion at the rear side in the figure of the main shaft 71 is fitted into the outer periphery of the connecting tube portion 62 of the elbow 60. Then, at the same time as this fitting, the shaft fixing plate 72 is abutted from the front side in the figure against each of the cylindrical female threaded tubes 11C protruding from four positions on the bottom plate of the head portion 11. Each female threaded tube 11C protrudes from four positions in the circumferential direction on the bottom plate portion around the fitting tube 11B of the head portion 11 (see FIG. 4).

[0076] After the above assembly, set screws S2 are inserted from the front side in the figure into the respective positions of the shaft fixing plate 72 to which the female threaded cylinders 11C are abutted, and the shaft fixing plate 72 is fastened integrally to the female threaded cylinders 11C. As a result, as shown in Fig. 8, the switching shaft 70 is attached integrally to the inside of the head portion 11. As a result of this fastening, the elbow 60 is pressed against the head portion 11 by the main shaft 71 of the switching shaft 70, and is fully fixed integrally to the head portion 11. The switching shaft 70 is configured such that a part of its shaft fixing plate 72 abuts against the connecting cylinder portion 21B of the head side flow path 21 assembled to the elbow 60 from the front side in the figure, and supports the connecting cylinder portion 21B of the head side flow path 21 from the front side in the figure.

[0077] 2 and 3, the switching body 80 includes a cylindrical body shaft 81, a body plate 82 extending in a radial direction from the body shaft 81 in a disk-like shape, and a male threaded tube 83 extending in a cylindrical shape from the outer periphery of the body plate 82 toward the front side in the figure. After the switching shaft 70 described above is assembled inside the head part 11, the switching body 80 is assembled from the front side in the figure so as to cover the assembly opening 11A of the head part 11.

[0078] Specifically, the switching body 80 is assembled in the head portion 11 as follows. First, the cylindrical portion on the rear side in the figure of the body shaft 81 is fitted onto the outer periphery of the cylindrical portion on the front side in the figure of the body shaft 71 of the switching shaft body 70. Then, a set screw S3 is inserted into a seat portion formed in the center of the inside of the cylinder of the body shaft 81 from the front side in the figure, and the set screw S3 is fastened integrally to the end portion on the front side in the figure of the body shaft 71 of the switching shaft body 70. As a result, the switching body 80 is attached integrally to the head portion 11 via the switching shaft body 70, as shown in FIG.

[0079] 2 and 3, the water sprinkler plate 30 includes a disk-shaped plate body 31, an internally threaded tube 32 extending cylindrically from the outer periphery of the plate body 31 toward the rear side in the figure, and a knob 33 protruding from the outer periphery of the cylindrical wall of the internally threaded tube 32. After the switching body 80 described above is assembled to the head portion 11, the water sprinkler plate 30 is assembled to the switching body 80 from the front side in the figure.

[0080] Specifically, the sprinkler plate 30 is assembled to the switching body 80 as follows. First, the female threaded tube 32 of the sprinkler plate 30 is set so as to match the outer periphery of the male threaded tube 83 of the switching body 80, and the female threaded surface of the female threaded tube 32 is turned so as to screw into the male threaded surface of the male threaded tube 83. As a result, as shown in Fig. 8, the female threaded tube 32 of the sprinkler plate 30 is butted against the tip of the cylindrical wall of the cylindrical container of the head part 11 in a manner that the end of the outer periphery ring 73 is sandwiched therebetween. As a result, the sprinkler plate 30 is set relative to the head part 11 in a manner that encloses the switching body 80 inside.

[0081] By the above assembly, the sprinkler plate 30 forms a sprinkler flow path between the plate body 31 and the main plate 82 of the switching body 80, into which hot and cold water flows from the flow path member 20. When hot and cold water flows into the sprinkler flow path, the sprinkler plate 30 disperses and sprays the hot and cold water to the outside from the countless sprinkler holes 31A formed to penetrate the plate body 31.

[0082] Knob 33 is configured as an operating part that allows a user to hook his / her finger on knob 33 to rotate sprinkler plate 30. When a user hooks his / her finger on knob 33 and rotates it in the pivoting direction, sprinkler plate 30 rotates internal switching body 80 accordingly, and the form of hot water sprayed from sprinkler plate 30 is switched between mist-like spray and shower-like spray.

[0083] To summarize the above, the showerhead 1 according to the first embodiment has the following configuration: Note that the reference characters in parentheses below correspond to the respective components shown in the above embodiment.

[0084] That is, the showerhead (1) comprises a housing (10) including a head portion (11) that serves as a spray section and a grip portion (12) that extends cylindrically from the peripheral wall of the head portion (11), and a cylindrical flow path member (20) that is incorporated inside the housing (10) and forms a flow path for hot and cold water. The flow path member (20) has a head-side flow path (21) that is fixed inside the head portion (11) and extends into the grip portion (12), and a grip-side flow path (22) that is directly or indirectly connected to the head-side flow path (21) from the base end side in the cylindrical axis direction within the grip portion (12).

[0085] The shower head (1) further includes a water purification cartridge (40) that is set in a state in which the head-side flow path (21) and the grip-side flow path (22) are connected to each other in the axial direction of the cylinder, and a locking member (CL) that is fitted from the outside in the axial direction of the cylinder into a through hole (12B) formed in the cylindrical wall of the grip portion (12) and engages with the grip-side flow path (22) in a state that restricts movement of the grip portion (12) in the axial direction of the cylinder.

[0086] According to the above configuration, the water purification cartridge (40) can be provided in a state where the head-side flow path (21) fixed to the head portion (11) of the housing (10) and the grip-side flow path (22) that is flow-connected to the head-side flow path (21) in the grip portion (12) directly or indirectly via the water purification cartridge (40) and is prevented from coming off by the locking member (CL) in a state where the water purification cartridge (40) is appropriately connected in the cylindrical axis direction. Therefore, the water purification cartridge (40) and the flow path member (20) can be assembled in the grip portion (12) of the housing (10) in a state where the water purification cartridge (40) and the flow path member (20) are appropriately connected in the cylindrical axis direction.

[0087] In addition, the head side flow path (21) and / or the grip side flow path (22) have recessed fitting recesses (21C, 22C) into which the water purification cartridge (40) can be fitted in the cylindrical axial direction to connect the flow path.

[0088] According to the above configuration, the water purification cartridge (40) can be more simply and appropriately assembled in a state of flow path connection to the head-side flow path (21) and / or the grip-side flow path (22). Furthermore, when the grip-side flow path (22) is directly or indirectly connected to the head-side flow path (21) via the water purification cartridge (40), the water purification cartridge (40) can be fitted into the fitting recesses (21C, 22C) to easily assemble them in a state where the water purification cartridge (40) is temporarily held in the fitting recesses (21C, 22C).

[0089] In addition, the head side flow path (21) and the grip side flow path (22) are directly connected to each other by fitting an outer tube portion (22B) extending from one of them in the axial direction into the outer periphery of the other, and a water purification cartridge (40) is provided in the connecting flow path.

[0090] According to the above configuration, the head side flow path (21) and the grip side flow path (22) are directly connected to each other, so that it is possible to provide a purified water flow path that passes through the water purification cartridge (40) and another flow path that passes outside the water purification cartridge (40) between them.

[0091] In addition, the grip portion (12) extends straight in the axial direction of the cylinder from the peripheral wall of the head portion (11) at an angle in a bent shape. An outer tube portion (22B) is formed in the grip-side flow path (22). According to the above configuration, by forming the outer tube portion (22B) in the grip-side flow path (22) that passes through the grip portion (12) that extends straight in the axial direction of the cylinder, the grip-side flow path (22) can be smoothly passed through the grip portion (12) even with the outer tube portion (22B).

[0092] In addition, the outer cylinder portion (22B) has a diameter dimension that allows it to fit into the cylinder wall of the grip portion (12) with a gap therebetween in the cylinder diameter direction. According to the above-described configuration, the outer cylinder portion (22B) can suppress rattling of the head-side flow path (21) and the grip-side flow path (22) relative to the grip portion (12) in the cylinder diameter direction.

[0093] The grip-side flow path (22) has a protruding portion (22F) that fits into the cylindrical wall of the grip portion (12) in a state where the gap in the cylindrical diameter direction is filled, at a portion where the grip-side flow path (22) does not overlap with the water purification cartridge (40) in the cylindrical axial direction. The locking member (CL) engages with the protruding portion (22F).

[0094] According to the above-described configuration, the overhanging portion (22F) can more appropriately suppress rattling of the grip-side flow path (22) in the cylindrical radial direction relative to the grip portion (12). In addition, since the overhanging portion (22F) does not overlap with the water purification cartridge (40) in the cylindrical axial direction, the locking member (CL) can be fitted deeper into the overhanging portion (22F) from the outside in the cylindrical radial direction to engage with it.

[0095] The grip-side flow path 22 has a terminal engagement portion 22H that engages with a terminal on the base end side in the cylindrical axis direction of the grip portion 12. The terminal engagement portion 22H has an annular terminal mating portion H1 that protrudes outward from the terminal on the base end side of the grip portion 12 and is fitted in the cylindrical axis direction along the entire circumference of the terminal on the base end side, and a terminal fitting portion H2 that fits into the cylindrical wall of the terminal on the base end side of the grip portion 12 in a state where a gap in the cylindrical diameter direction is filled.

[0096] According to the above configuration, the terminal engagement portion (22H) of the grip-side flow path (22) can be exposed from the terminal on the base end side of the grip portion (12) in a shape that looks integrated with the grip portion (12) and has a good appearance.

[0097] In addition, an uneven structure (H3, 12D) is provided between an outer peripheral wall of the grip side flow path (22) at the base end in the tubular axis direction and an inner peripheral wall of the grip portion (12) at the base end in the tubular axis direction, which fits into each other in the tubular axis direction to regulate rotation of the grip side flow path (22) in the tubular circumferential direction relative to the grip portion (12).

[0098] According to the above-described configuration, the grip-side flow path (22) can be assembled to the grip portion (12) in a state in which it is appropriately prevented from rotating.

[0099] Other embodiments Although one embodiment of the present invention has been described above, the present invention can be embodied in various forms as described below in addition to the above embodiment.

[0100] 1. The showerhead of the present invention may be configured as a so-called handheld showerhead that is held by the user in the hand, or it may be configured as a so-called overhead showerhead that is fixed to the wall or ceiling of the bathroom and sprays shower water onto the user from above.

[0101] 2. The grip portion of the housing may extend straight from the peripheral wall of the head portion in the axial direction at an angle in a bent shape, or may extend straight from the peripheral wall of the head portion. The grip portion may be cylindrical, angular, or irregular. The grip portion may be configured to be fitted in a non-cylindrical shape to prevent the grip-side flow passage from rotating.

[0102] 3. The head-side flow path and the grip-side flow path that constitute the flow path member may be cylindrical, square, or irregularly shaped. The grip-side flow path may be directly connected to the head-side flow path and have a water purification cartridge installed inside, or may be indirectly connected to the head-side flow path via a water purification cartridge. In that case, the water purification cartridge is individually connected to the grip-side flow path and the head-side flow path, and hot and cold water flowing from the grip-side flow path passes through its interior and flows to the head-side flow path.

[0103] 4. The water purification cartridge may be configured to use calcium sulfite as a filter medium, an activated carbon filter and / or a hollow fiber membrane filter as a filter medium, or a combination of these.

[0104] 5. The locking member that prevents the grip-side flow path from coming off from the grip portion may be a clip, a pin, or a screw. The locking member may be configured to engage with a portion of the grip-side flow path that does not have a protruding portion, i.e., a portion that is disposed with a gap in the cylindrical diameter direction between the grip portion and the cylindrical wall. The locking member may be configured to stop the rotation of the grip-side flow path relative to the grip portion by engaging with the grip-side flow path. The locking member may be configured to engage with a portion of the grip-side flow path that overlaps with the water purification cartridge in the cylindrical axis direction.

[0105] 6. In the above embodiment, a configuration was exemplified in which a concave fitting recess was formed in both the head side flow path and the grip side flow path, into which the water purification cartridge can be fitted in the axial direction to connect the flow paths, but the fitting recess may be formed only on one side or on neither side. That is, even if a fitting recess is not formed, it is possible to adopt a configuration in which the head side flow path and / or the grip side flow path can be abutted against the water purification cartridge in the axial direction to connect the flow paths, or the entire water purification cartridge can be accommodated in a fitting recess formed on one side, and the grip side flow path can be directly connected to the head side flow path to set the water purification cartridge in a state of flow path connection between the grip side flow path and the head side flow path in the axial direction.

[0106] 7. In the above embodiment, a configuration was illustrated in which an outer tube portion that fits into the outer periphery of the head side flow path was formed in the grip side flow path, but a configuration in which the outer tube portion is formed in the head side flow path and fits into the outer periphery of the grip side flow path may also be used.

[0107] 8. The concave-convex structure formed between the outer peripheral wall of the grip side flow path at the base end in the axial direction and the inner peripheral wall of the grip portion at the base end in the axial direction, which fits into each other in the axial direction to regulate rotation, may be configured so that the concave and convex portions are formed separately on either side. [Explanation of symbols]

[0108] 1. Shower head 10. Housing 11 Head section 11A Assembly opening 11B Mating tube 11C Female thread cylinder 12 Grip section 12A extension opening 12B through hole 12C Terminal recess 12D locking protrusion (uneven structure) 13 Cap 13A Female thread cylinder 13B Claws 20 Flow path member 21 Head side flow passage 21A Connection tube 21B Connection tube 21C Recessed part 21D Step 21E Fin 22 Grip side flow path 22A Connection tube 22B Outer cylinder part 22C Fitting recess 22D Step 22E base 22F Overhang 22G locking groove 22H Terminal engagement part 22J Male threaded cylinder H1 Terminal joint part H2 Terminal fitting area H3 terminal protrusion (uneven structure) 30 Sprinkler Board 31 Board body 31A Watering hole 32 Female thread cylinder 33 Knob 40 Water Purifier Cartridge 41 Large diameter part 42 Proximal process 43 Middle protrusion 50 Ultra Fine Bubble Generator 60 Elbow 61 Connection tube 62 Connection tube 63 Fitting protrusion 70 Switching shaft 71 Main shaft 72 Shaft fixing plate 73 Outer Ring 80 Switching body 81 Main shaft 82 Main Board 83 Male threaded cylinder CL Clip (locking member) CL1 Groove fitting part CL2 hole fitting part S1 Setscrew S2 Set screw S3 Setscrew

Claims

1. A shower head comprising a housing having a head portion which serves as a spray portion and a grip portion which extends cylindrically from the peripheral wall of the head portion, and a cylindrical flow path member which is incorporated inside the housing and forms a flow path for hot and cold water, the flow path member has a head-side flow path fixed in the head portion and extending into the grip portion, and a grip-side flow path that is directly or indirectly connected to the head-side flow path in the grip portion from a base end side in a cylindrical axis direction, the showerhead further comprises a water purification cartridge that is set in a state in which the head-side flow path and the grip-side flow path are connected in a flow path in the axial direction of the cylinder, and a locking member that is fitted from the outside in the axial direction of the cylinder into a through hole formed in a cylindrical wall of the grip portion and engages with the grip-side flow path in a state that restricts movement in the axial direction relative to the grip portion, The grip-side flow path has a protruding portion that fits into the cylindrical wall of the grip portion in a state where a gap in the cylindrical diameter direction is filled, at a portion where the grip-side flow path does not overlap with the water purification cartridge in the cylindrical axial direction, The shower head, wherein the locking member engages with the protruding portion.

2. 2. The showerhead of claim 1, A showerhead, wherein the head-side flow path and / or the grip-side flow path has a concave fitting recess into which the water purification cartridge can be fitted in the axial direction to connect the flow path.

3. 3. The showerhead according to claim 1, A showerhead in which the head-side flow path and the grip-side flow path are directly connected to each other by fitting an outer tubular portion extending from one of them in the axial direction into the outer periphery of the other, and the water purification cartridge is provided within the connected flow path.

4. 4. The showerhead of claim 3, The grip portion extends straight in the axial direction of the cylinder from a peripheral wall of the head portion at an angle in a bent shape, and the outer cylinder portion is formed in the grip-side flow path.

5. 5. The showerhead according to claim 3 or 4, The showerhead has a diameter dimension such that the outer cylindrical portion fits into the cylindrical wall of the grip portion with a radial gap filled therewith.

6. 6. The showerhead according to claim 1, the grip-side flow path has a terminal engagement portion that engages with a terminal on the base end side in the cylindrical axis direction of the grip portion, the terminal engagement portion having an annular terminal mating portion that protrudes outward from the base end terminal of the grip portion and is brought into contact with the entire circumference along the base end terminal in the cylindrical axis direction, and an terminal fitting portion that fits into the cylindrical wall of the base end terminal of the grip portion in a state where any gaps in the cylindrical diameter direction are filled.

7. 7. The showerhead according to claim 1, The showerhead has an uneven structure between an outer peripheral wall of the grip-side flow passage at the base end in the axial direction of the cylinder and an inner peripheral wall of the grip portion at the base end in the axial direction of the cylinder, the uneven structure fitting together in the axial direction of the cylinder to restrict rotation of the grip-side flow passage in the circumferential direction of the cylinder relative to the grip portion.

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