Shower head

Abstract

To provide a shower head of a new configuration.SOLUTION: A shower head includes: a shower head body having a first boss; a changeover plate having a valve storage part, which is fixed to the shower head body; a valve body stored in the valve storage part; a core 50 for mist having a first insertion hole 53 and a port 55 for normal sprinkling, which can relatively rotate with the shower head body around the first boss with the first boss being inserted into the first insertion hole 53; a normal sprinkling plate for sectionally forming a normal front chamber with the core 50 and jetting hot water of the normal front chamber; and a washer 90 arranged in the normal front chamber and fixed to the first boss, which regulates the range of the relative rotation between the shower head body and the core 50 by the abutment with the core 50. By the relative rotation between the shower head body and the core 50, the valve body opens / closes the port 55. The washer 90 is arranged facing the opening of the port 55 in the normal front chamber.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a shower head that is installed in a bathroom, a washbasin, etc. [Background technology]

[0002] In the showerhead of Patent Document 1, a mist guide formed in a conical spiral shape is attached inside a mist throttle hole formed in a conical hole. Therefore, a spiral mist flow path is formed between the spiral surface of the mist guide and the conical inner peripheral surface of the mist throttle hole. Liquid that flows into the mist throttle hole flows through the mist flow path and is sprayed to the outside from the mist throttle hole as mist-like droplets.

[0003] The mist injection valve of Patent Document 2 is provided with a swirling flow generating chamber having a circular cross section, an inlet communicating with the swirling flow generating chamber in a substantially tangential direction, and an injection port opening at one end of the swirling flow generating chamber and formed in an orifice shape coaxial with the central axis of the swirling flow generating chamber.

[0004] Water that flows into the swirl flow generating chamber from the inlet swirls along the wall of the swirl flow generating chamber, forming a vortex. The water then passes through the nozzle while swirling, and is sprayed from the tip of the mist spray valve. The sprayed water forms a hollow cone-shaped thin water film, which breaks up into fine particles and turns into mist. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-011034 A [Patent Document 2] JP 2006-150149 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a showerhead with a novel configuration. [Means for solving the problem]

[0007] 1 is a perspective view of a showerhead according to an embodiment of the present invention; and FIG. 2 is a perspective view of a showerhead according to an embodiment of the present invention. In order to achieve the above object, the showerhead of the present invention comprises a showerhead body that forms an outer shell and has a boss on its inner surface, a switching plate that has a valve housing and is fixed to the showerhead body, a valve body housed in the valve housing, a circular plate that has an insertion hole and a normal spray port and into which the boss of the showerhead body is inserted so that the normal spray plate can rotate relatively to the showerhead body around the boss, a normal spray plate that defines a normal antechamber between itself and the circular plate and sprays hot and cold water into the normal antechamber, and a washer that is disposed in the normal antechamber and fixed to the boss and that defines the range of relative rotation between the showerhead body and the circular plate by abutting against the circular plate, and the valve body opens and closes the normal spray port by rotating the showerhead body and the circular plate relative to each other, and the washer is disposed opposite the opening of the normal spray port in the normal antechamber. Effect of the Invention

[0008] The showerhead of the present invention has a novel configuration. [Brief description of the drawings]

[0009] [Figure 1] FIG. [Diagram 2] 3 is an exploded perspective view of a shower head and a perspective view of a jig for attaching and detaching a ring. FIG. [Diagram 3] FIG. [Figure 4] 4 is a cross-sectional view of the showerhead taken along line AA in FIG. 3. [Diagram 5] FIG. [Figure 6] (a) is a front view of the switching plate, and (b) is a rear view of the switching plate. [Figure 7] (a) Right side view of the switching plate, (b) left side view of the switching plate. [Figure 8](a) is a plan view of the switching plate, and (b) is a bottom view of the switching plate. [Figure 9] (a) is a front view of the valve disc, (b) is a rear view of the valve disc, and (c) is a right side view of the valve disc. [Figure 10] (a) Front view of the mist core, (b) rear view of the mist core. [Figure 11] (a) Right side view of the mist core, (b) left side view of the mist core. [Figure 12] (a) Plan view of the mist core, (b) bottom view of the mist core. [Figure 13] (a) Front view of the mist sprinkler plate, (b) rear view of the mist sprinkler plate. [Figure 14] 13(b) is an enlarged view of a main portion of FIG. 13(b), (b) is a cross-sectional view of a groove portion corresponding to line BB in (a), and (c) is a perspective view of (a). [Figure 15] FIG. 4 is an enlarged view of the main part of FIG. [Figure 16] (a) Front view of a normal sprinkler plate, (b) rear view of a normal sprinkler plate, and (c) right side view of a normal sprinkler plate. [Figure 17] (a) Front view of the mounting ring, (b) rear view of the mounting ring, and (c) right side view of the mounting ring. [Figure 18] FIG. [Figure 19] 4 is a cross-sectional view of the showerhead corresponding to line CC in FIG. 3, where (a) shows the valve disc in the normal water spray position, and (b) shows the valve disc in the mist water spray position. [Figure 20] (a) A cross-sectional view of the showerhead corresponding to line DD in Figure 19(a), and (b) a cross-sectional view of the showerhead corresponding to line EE in Figure 19(b). [Figure 21] 13A to 13C are diagrams showing another example, in which (a) is a front view of a convex portion for mist, (b) is a rear view of the convex portion for mist, and (c) is a right side view of the convex portion for mist. [Figure 22] FIG. 11 is a perspective view of a mist convex portion and a mist core, showing another example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in which the present invention is embodied in a shower head (which can also be understood as a mist spraying device) that is installed in a bathroom or on a washstand.

[0011] As shown in FIG. 1, showerhead 1 has a disk-shaped head 2 and a rod-shaped handle 3. Head 2 and handle 3 are connected together so that a central axis L1 of head 2 and a central axis L2 of handle 3 are inclined relative to each other. Head 2 is for spraying hot and cold water in a shower-like manner. Handle 3 is for a user to hold. A shower hose (not shown) is connected to handle 3. Showerhead 1 receives a supply of hot and cold water via the shower hose.

[0012] As shown in Figures 1 and 2, showerhead 1 has a showerhead body 11 that forms the outer shell of showerhead 1. Showerhead body 11 has a head cover 12 that forms the outer shell of head 2, and a handle cover 13 that forms the outer shell of handle 3. Head cover 12 and handle cover 13 are each a one-piece molded product made of synthetic resin.

[0013] 5, the head cover 12 has a cylindrical storage section 14 with a lid 14a on the back side, and a generally round bar-shaped connecting section 15 having one end connected to the outer surface of the lid 14a in the storage section 14. A cylindrical partition wall 16 is provided on the inner surface of the lid 14a.

[0014] A first boss 17 is provided on the inner surface of the lid 14a, centered on the central axis L1. A notch 17a is provided at the tip of the first boss 17. A plurality of notches 17a (two in this embodiment) are arranged at equal intervals around the central axis L1. A second boss 18 extending in the direction of the central axis L1 is provided on the inner surface of the lid 14a, radially outward from the partition wall 16. A plurality of second bosses 18 (three in this embodiment) are arranged at equal intervals around the central axis L1.

[0015] In the storage section 14, a common front chamber 19 is provided between the partition wall 16 and the first boss 17. A common water passage 20 is provided in the longitudinal direction within the connecting section 15. One longitudinal end of the common water passage 20 is connected to the common front chamber 19 of the storage section 14. A male thread 15a is provided at the other longitudinal end of the connecting section 15. A rotation stopper 15b is provided on the other longitudinal end face of the connecting section 15.

[0016] As shown in Figures 2 and 3, one end of the handle cover 13 in the direction of the central axis L2 (the side opposite the head 2) is provided with a male thread 13a for connecting the shower hose. The shower hose is connected to the male thread 13a via a well-known adapter (not shown). The other end of the handle cover 13 in the direction of the central axis L2 (the side facing the head 2) is provided with a female thread 13b. A rotation stopper 13d is provided on the rear side of the female thread 13b in the handle cover 13.

[0017] 3, the head cover 12 and the handle cover 13 are integrated by connecting the male thread 15a of the head cover 12 (connecting portion 15) with the female thread 13b of the handle cover 13. The watertightness of the screw connection is ensured by a seal ring 22 that is attached to the outer circumferential surface of the connecting portion 15 of the head cover 12 and pressed against the inner circumferential surface of the handle cover 13. The relative rotation based on the screw connection between the head cover 12 and the handle cover 13 is performed up to a position where the rotation stoppers 13d, 15b of each cover come into contact with each other, and in this contact state, the relative rotation position of the head cover 12 and the handle cover 13 about the central axis L2 is defined.

[0018] A storage section 13c is provided in the space within the handle cover 13. The storage section 13c can be opened by releasing the connection between the male thread 15a of the head cover 12 (connecting section 15) and the female thread 13b of the handle cover 13. A filter cartridge 21 is stored in the storage section 13c. The filter cartridge 21 contains a water quality modifying agent (not shown).

[0019] The hot and cold water supplied from the shower hose to the storage section 13c of the handle cover 13 has its quality changed in the filter cartridge 21 and then flows into the common water passage 20 of the head cover 12 (connecting section 15). The hot and cold water in the common water passage 20 flows into the common antechamber 19 of the head cover 12 (storage section 14).

[0020] The water quality modifying agent may be, for example, a chlorine remover. Examples of the chlorine remover include calcium sulfite, ascorbic acid, and activated carbon. Examples of the water quality modifying agent other than the chlorine remover include hydrogen generating agents such as magnesium, and aromatic substances. When the water quality modifying agent has deteriorated, the screw connection between the head cover 12 and the handle cover 13 may be released, and the filter cartridge 21 may be replaced with a new one.

[0021] The showerhead 1 of this embodiment is capable of switching between a typical shower spray (hereinafter referred to as "normal spray") and a mist (fine particle) shower spray (hereinafter referred to as "mist spray"). The head cover 12 is provided with a structure for selectively achieving normal spray and mist spray.

[0022] 2, this configuration includes an upstream switching plate 30, a valve body 40 held by the switching plate 30, a mist core 50 for switching between a normal watering flow path and a mist sprinkling flow path with the valve body 40, a mist sprinkling plate 70 for mist sprinkling, a washer 90, a normal sprinkling plate 100 for normal sprinkling, and an attachment ring 110 for attaching the normal sprinkling plate 100 to the mist sprinkling plate 70. The showerhead 1 comes with a ring attachment / detachment jig 200 used to remove the attachment ring 110.

[0023] 6 to 8, the switching plate 30 is a one-piece molded product made of synthetic resin and has a disk shape. A cylindrical insertion portion 31 is provided on the back surface of the switching plate 30, the center of which is a central axis L1. A seal receiving groove 31a is provided in an annular shape on the outer circumferential surface of the insertion portion 31. A seal ring 32 is received in the seal receiving groove 31a.

[0024] A cylindrical support portion 33 is provided on the front surface of the switching plate 30, the support portion 33 being centered on the central axis L1. An annular packing 34 is attached to the outer peripheral surface of the support portion 33. A notch 30a is provided on the outer peripheral edge of the switching plate 30. A plurality of notches 30a (three in this embodiment) are arranged at equal intervals around the central axis L1.

[0025] A first insertion hole 35, which is a circular hole centered on the central axis L1, is formed through the switching plate 30. A second insertion hole 36 extending in the direction of the central axis L1 is formed through the switching plate 30 radially outward of the insertion portion 31 and the support portion 33. A plurality of second insertion holes 36 (three in this embodiment) are disposed at equal intervals around the central axis L1.

[0026] A cylindrical valve accommodating portion 37 with a bottom that opens to the front side is provided on the front side of the switching plate 30, radially inward from the support portion 33. A plurality of valve accommodating portions 37 (two in this embodiment) are arranged at unequal intervals around the central axis L1. A counter portion 38 is provided to protrude in the direction of the central axis L1 at the wider interval of these unequal intervals.

[0027] A common water hole 39 extending in the direction of the central axis L1 is formed through the switching plate 30 near the first insertion hole 35. The common water hole 39 is disposed close to one of the valve accommodating portions 37 at the narrower of the unequal intervals between the two valve accommodating portions 37. A cylindrical portion 39a forming an inlet of the common water hole 39 is provided on the back surface of the insertion portion 31. The outlet of the common water hole 39 opens radially inward from the support portion 33 on the front surface of the switching plate 30.

[0028] The tubular portion 39a has a first wall 39a-1 curved along the outer peripheral edge of the switching plate 30, a second wall 39a-2 curved along the nearby valve accommodating portion 37, a third wall 39a-3 extending radially of the switching plate 30, and a fourth wall 39a-4 linearly connecting the second wall 39a-2 and the third wall 39a-3.

[0029] The first wall 39a-1 becomes higher in the direction of the central axis L1 from the second wall 39a-2 side to the third wall 39a-3 side around the central axis L1. The second wall 39a-2 and the third wall 39a-3 both become higher in the direction of the central axis L1 as they move radially inward, and the heights of the portions connected to the fourth wall 39a-4 are the same.

[0030] Therefore, the direction of flow toward the upstream side (back side) at the inlet of the common water passage 39 is inclined radially outward and toward one side in the circumferential direction (the second wall 39a-2 side), and can be said to be along the circumferential direction with respect to the inner surface of the accommodating section 14 of the head cover 12.

[0031] 2 to 4, the switching plate 30 is attached to the head cover 12 with the first boss 17 of the head cover 12 inserted into the first insertion hole 35 and the insertion portion 31 inserted into the partition wall 16 of the head cover 12. The head cover 12 and the switching plate 30 are arranged with the position of the second boss 18 of the head cover 12 and the position of the second insertion hole 36 of the switching plate 30 coinciding with each other around the central axis L1. The head cover 12 and the switching plate 30 are fixed to each other by screws 150 inserted from each second insertion hole 36 to the corresponding second boss 18.

[0032] The opening on the front side of the common front chamber 19 of the head cover 12 is closed by the insertion part 31 of the switching plate 30. A seal ring 32 attached to the insertion part 31 ensures watertightness between the insertion part 31 and the partition wall 16, i.e., watertightness of the common front chamber 19. The common front chamber 19 is open to the front side of the switching plate 30 via a common water passage hole 39. Therefore, hot and cold water flowing into the common front chamber 19 flows out from the back side of the switching plate 30 to the front side of the switching plate 30 via the common water passage hole 39.

[0033] As shown in Fig. 9, the valve body 40 has a large diameter cylindrical portion 41 made of synthetic resin and a small diameter cylindrical portion 42 made of synthetic resin that are integrally connected on the same axis. A seal accommodating groove 41a is provided in an annular shape on the end face (front face) of the large diameter cylindrical portion 41. A seal ring 43 is accommodated in the seal accommodating groove 41a. A spring accommodating portion 42a is provided on the end face (back face) of the small diameter cylindrical portion 42.

[0034] 2 to 4, a plurality of valve bodies 40 (two in this embodiment) are provided in accordance with the number of valve accommodating portions 37 of the switching plate 30. Each valve accommodating portion 37 of the switching plate 30 accommodates a small diameter cylindrical portion 42 of a corresponding valve body 40. The outer peripheral surface of the small diameter cylindrical portion 42 is guided by the inner peripheral surface of the valve accommodating portion 37, allowing the valve body 40 to move back and forth in the direction of the central axis L1.

[0035] A coil spring 44 is interposed between the spring accommodating portion 42a of the valve body 40 and the valve accommodating portion 37 of the switching plate 30. The valve body 40 is biased by the coil spring 44 in a direction in which the small diameter cylindrical portion 42 protrudes from the valve accommodating portion 37.

[0036] As shown in Figures 10 to 12, the mist core 50 is a disk-shaped integrally molded product made of synthetic resin. A cylindrical partition wall 51 is provided on the outer periphery of the back surface of the mist core 50, the partition wall 51 being centered on the central axis L1. A seal receiving groove 51a is provided in an annular shape on the outer periphery of the partition wall 51. A seal ring 52 is received in the seal receiving groove 51a.

[0037] A first insertion hole 53, which is a circular hole centered on the central axis L1, is formed through the mist core 50. A second insertion hole 54 extending in the direction of the central axis L1 is formed through the mist core 50 near the outer periphery. A plurality of second insertion holes 54 (three in this embodiment) are arranged at equal intervals around the central axis L1. The second insertion holes 54 open at the tip surface of the partition wall 51 on the back surface of the mist core 50.

[0038] A normal sprinkling port 55 extending in the direction of the central axis L1 is provided in the mist core 50 near the first insertion hole 53. A plurality of normal sprinkling ports 55 (two in this embodiment) are arranged at unequal intervals around the central axis L1.

[0039] A mist sprinkling port 56 extending in the direction of the central axis L1 is provided in the mist core 50 near the first insertion hole 53. Multiple mist sprinkling ports 56 (two in this embodiment) are arranged at unequal intervals around the central axis L1.

[0040] As shown in Fig. 19, the normal sprinkling ports 55 and the mist sprinkling ports 56 are arranged alternately around the central axis L1. The inner diameters of the normal sprinkling ports 55 and the mist sprinkling ports 56 are smaller than the inner diameter of the seal ring 43 of the valve body 40 (see Fig. 9).

[0041] 19(a), if the large diameter cylindrical portion 41 of the valve body 40 covers the opening of the mist sprinkler port 56 in a coaxial position, the mist sprinkler port 56 is blocked by the large diameter cylindrical portion 41 and the seal ring 43. Also, if the large diameter cylindrical portion 41 of the valve body 40 covers the opening of the normal sprinkler port 55 in a coaxial position, the normal sprinkler port 55 is blocked by the large diameter cylindrical portion 41 and the seal ring 43.

[0042] As shown in Figs. 10 to 12, a cylindrical support part 57 is provided on the front side of the mist core 50, centered on the central axis L1. The outer peripheral surface of the tip of the support part 57 is tapered so that the outer diameter becomes smaller toward the tip side. A boss 58 is provided on the front side of the mist core 50, radially inward from the support part 57, so as to surround the opening of the first insertion hole 53. A notch 58a is provided on the tip surface of the boss 58. A plurality of notches 58a (three in this embodiment) are arranged at unequal intervals around the central axis L1.

[0043] A water passage hole forming portion 59 is provided on the front surface of the mist core 50, radially inward from the support portion 57, so as to bridge the support portion 57 and the boss 58. A plurality of water passage hole forming portions 59 (two in this embodiment) are arranged at unequal intervals around the central axis L1. A mist water passage hole 60 is provided within the water passage hole forming portion 59. The mist water passage hole 60 has a rectangular cross section, extends from the radially inner side to the radially outer side, and opens at the outer circumferential surface of the support portion 57.

[0044] On the front side of the mist core 50, radially outward of the support portion 57, a mist water passage groove 61 is provided that connects the outer peripheral surface of the support portion 57 and the outer peripheral edge of the mist core 50. A plurality of mist water passage grooves 61 (two in this embodiment) are arranged at unequal intervals around the central axis L1. Each mist water passage groove 61 has a U-shaped cross section and is connected to a corresponding mist water passage hole 60.

[0045] The normal water sprinkling port 55 is opened on the front side of the mist core 50, avoiding the water hole forming portion 59. The mist sprinkling port 56 is opened at the position of the corresponding water hole forming portion 59 on the front side of the mist core 50, and is connected to the mist water hole 60. In other words, the mist sprinkling port 56 and the mist water groove 61 are connected via the mist water hole 60.

[0046] On the front side of the mist core 50, radially outward of the support portion 57, a cylindrical mist protrusion 62 extending in the direction of the central axis L1 is provided. A plurality of mist protrusions 62 (nine in this embodiment) are arranged at equal intervals around the central axis L1. A swirl assist chamber 63 is recessed in the tip surface of the mist protrusion 62. The internal space of the swirl assist chamber 63 is cylindrical. A tapered surface 62a is provided on the outer circumferential edge of the tip surface of the mist protrusion 62.

[0047] A radially extending engagement groove 50a is provided on the front surface of the mist core 50, radially outward from the support portion 57. A plurality of engagement grooves 50a (three in this embodiment) are arranged at unequal intervals around the central axis L1.

[0048] As shown in Fig. 13, the mist sprinkling plate 70 is a one-piece molded product made of synthetic resin and has a disk shape. A circular accommodation hole 71 is provided through the mist sprinkling plate 70 and is centered on a central axis L1. A female thread 71a is provided in the front side area of ​​the inner circumferential surface of the accommodation hole 71. A cylindrical inner wall 72 centered on the central axis L1 is provided on the opening edge on the rear side of the accommodation hole 71. A notch 72a is provided on the tip surface of the inner wall 72. A plurality of notches 72a (two in this embodiment) are arranged at unequal intervals around the central axis L1.

[0049] A cylindrical outer wall 73 centered on the central axis L1 is provided on the outer peripheral edge of the back surface of the mist sprinkling plate 70. A knob 73a is provided on the outer peripheral surface of the outer wall 73. A cylindrical intermediate wall 74 centered on the central axis L1 is provided on the back surface of the mist sprinkling plate 70, radially inward from the outer wall 73 and radially outward from the inner wall 72.

[0050] An annular step 74a is provided on the inner circumferential surface of the intermediate wall 74, centered on the central axis L1. A locking protrusion 74b is provided on the inner circumferential surface at the tip of the intermediate wall 74, facing radially inward. A plurality of locking protrusions 74b (three in this embodiment) are arranged at equal intervals around the central axis L1. A gap is provided between the step 74a and the locking protrusion 74b in the direction of the central axis L1.

[0051] A boss 75 extending in the direction of the central axis L1 is provided on the back surface of the mist sprinkling plate 70, radially inward from the intermediate wall 74 and radially outward from the inner wall 72. A plurality of bosses 75 (three in this embodiment) are disposed at equal intervals around the central axis L1.

[0052] On the back surface of the mist sprinkling plate 70, a radially extending engagement rib 70a is provided radially inward from the intermediate wall 74 and radially outward from the inner wall 72. A plurality of engagement ribs 70a (three in this embodiment) are arranged at unequal intervals around the central axis L1.

[0053] In the mist sprinkler plate 70, a nozzle portion 77 is provided radially inward from the intermediate wall 74 and radially outward from the inner wall 72. A plurality of nozzle portions 77 (nine in this embodiment) are arranged at equal intervals around the central axis L1.

[0054] 14, the nozzle portion 77 has an insertion hole 78 opened on the back surface of the mist sprinkling plate 70, a conical inner surface jetting recess 83 provided on the front surface of the mist sprinkling plate 70 and expanding toward the front side, mist holes 79 opened toward the front side of the mist sprinkling plate 70 on the inner bottom surface of the jetting recess 83, and a swirling chamber 80 arranged between the insertion hole 78 and the mist holes 79. The swirling chamber 80 has a cylindrical region 80a on the insertion hole 78 side and a truncated cone region 80b on the mist holes 79 side.

[0055] The insertion hole 78, the cylindrical region 80a, the truncated cone region 80b, and the mist orifice 79 are arranged on the same axis (the central axis L3 of the nozzle portion 77). The inner diameter of the truncated cone region 80b on the cylindrical region 80a side is approximately equal to the inner diameter of the cylindrical region 80a, and the inner diameter of the truncated cone region 80b on the mist orifice 79 side is approximately equal to the inner diameter of the mist orifice 79. The inner surface of the truncated cone region 80b is smoothly connected to the inner surface of the cylindrical region 80a and the inner surface of the mist orifice 79. A tapered surface 78a is provided near the boundary with the cylindrical region 80a in the insertion hole 78, with the cylindrical region 80a side having a smaller diameter.

[0056] The nozzle portion 77 has a mist introduction groove 81. The mist introduction groove 81 is provided around the insertion hole 78 on the back surface of the mist sprinkling plate 70. Multiple mist introduction grooves 81 (three in this embodiment) are arranged at equal intervals around the central axis L3 of the nozzle portion 77. The mist introduction groove 81 is narrower in width as it approaches the insertion hole 78 in rear view, and conversely, is wider as it moves away from the insertion hole 78.

[0057] The mist introduction groove 81 is provided from a region radially outward from the opening edge of the insertion hole 78 to the cylindrical region 80a of the swirl chamber 80. Therefore, the annular shape of the inner circumferential surface of the insertion hole 78 is interrupted by the mist introduction groove 81. Also, the annular shape of the inner circumferential surface of the cylindrical region 80a on the back side is interrupted by the mist introduction groove 81.

[0058] The mist introduction grooves 81 extend in the tangential direction of the swirl chamber 80 (cylindrical region 80a). The bottom surfaces of the mist introduction grooves 81 are located on the same conical inner surface centered on the central axis L3 of the nozzle portion 77. Therefore, the mist introduction grooves 81 are inclined so that they become deeper as they approach the cylindrical region 80a and become shallower as they move away from the cylindrical region 80a.

[0059] As shown in Figures 3 and 4, the mist core 50 is attached to the mist sprinkling plate 70 with the partition wall 51 inserted into the intermediate wall 74 of the mist sprinkling plate 70 up to the position of the step 74a and the support part 57 inserted into the inner wall 72 of the mist sprinkling plate 70. The mist sprinkling plate 70 and the mist core 50 are arranged with the position of the boss 75 of the mist sprinkling plate 70 and the position of the second insertion hole 54 of the mist core 50 coinciding with each other around the central axis L1. The mist sprinkling plate 70 and the mist core 50 are fixed to each other by screws 151 inserted from each second insertion hole 54 to the corresponding boss 75.

[0060] As shown in Figures 10 and 13, the engagement grooves 50a of the mist core 50 are inserted into the corresponding engagement ribs 70a of the mist sprinkling plate 70. The engagement between the engagement grooves 50a and the engagement ribs 70a prevents the mist core 50 and the mist sprinkling plate 70 from rotating relative to each other about the central axis L1. The engagement grooves 50a and the engagement ribs 70a are arranged at unequal intervals around the central axis L1. In other words, the engagement grooves 50a and the engagement ribs 70a define the relative mounting positions of the mist core 50 and the mist sprinkling plate 70.

[0061] 14 and 15, with the mist core 50 and the mist sprinkling plate 70 fixed to each other, the tip of the mist convex portion 62 of the mist core 50 is inserted into the insertion hole 78 of the corresponding nozzle portion 77 of the mist sprinkling plate 70. The mist convex portion 62 is inserted to a position where the tapered surface 62a of the mist convex portion 62 abuts against the tapered surface 78a of the insertion hole 78.

[0062] That is, in the portion of the mist introduction groove 81 where the mist protrusion 62 is inserted into the insertion hole 78, the opening on the back side is blocked by the mist protrusion 62. Therefore, in that portion, i.e., the entrance portion to the swirl chamber 80 (cylindrical region 80a), the passage cross-sectional area is determined by the inner surface of the mist introduction groove 81 and the tapered surface 62a of the mist protrusion 62.

[0063] 15, when the mist convex portion 62 is inserted into the insertion hole 78, the swirl chamber 80 of the nozzle portion 77 and the swirl assist chamber 63 of the mist convex portion 62 form a continuous space in the direction of the central axis L3 of the nozzle portion 77. The swirl chamber 80 and the swirl assist chamber 63 are arranged on the central axis L3. The inner diameter of the swirl assist chamber 63 is smaller than the inner diameter of the swirl chamber 80.

[0064] 3 and 4, on the back side of the mist sprinkling plate 70, the space between the inner wall 72 and the intermediate wall 74 is closed by the mist core 50 to form a mist front chamber 82. The seal ring 52 attached to the partition wall 51 of the mist core 50 ensures watertightness between the partition wall 51 and the intermediate wall 74 of the mist sprinkling plate 70, i.e., the watertightness of the mist front chamber 82.

[0065] The mist water passage groove 61 of the mist core 50 and the mist introduction groove 81 of the mist sprinkling plate 70 are arranged in the mist front chamber 82. In other words, the mist sprinkling port 56 of the mist core 50 and the mist introduction groove 81 of the nozzle portion 77 are connected via the mist water passage hole 60, the mist water passage groove 61, and the mist front chamber 82.

[0066] The cutout 72a (see Figure 13) of the inner wall 72 is provided to correspond to the opening of the mist water hole 60 (see Figure 10) on the outer peripheral surface of the support part 57, and the inner wall 72 surrounding the radial outside of the support part 57 ensures that the connection between the mist water hole 60 and the mist water groove 61 is not obstructed.

[0067] As shown in Fig. 2, the metal washer 90 has a main body plate portion 90a having an annular shape, an outer plate portion 90b protruding in the radial direction from the outer peripheral surface of the main body plate portion 90a, and an inner plate portion 90c protruding in the radial direction from the inner peripheral surface of the main body plate portion 90a. The outer plate portions 90b are arranged at equal intervals around the central axis L1 in a plurality of portions (three in this embodiment). Two of the three outer plate portions 90b (90b-1) are longer in the radial direction than the remaining one (90b-2). The inner plate portions 90c are arranged at equal intervals around the central axis L1 in a plurality of portions (two in this embodiment).

[0068] As shown in Figures 3, 4 and 18, the sprinkler side assembly Aassy, ​​which is formed by integrating the mist core 50 and the mist sprinkler plate 70, is attached to a cover side assembly Bassy, ​​which is formed by integrating the head cover 12 and the switching plate 30 and has the valve body 40 and coil spring 44 attached to the switching plate 30.

[0069] That is, in the sprinkler side assembly Aassy, ​​the first boss 17 of the head cover 12 is inserted into the first insertion hole 53 of the mist core 50, and the intermediate wall 74 of the mist sprinkler plate 70 is inserted between the outer periphery of the switching plate 30 and the accommodation portion 14 of the head cover 12. This insertion is performed in a state where the position of the notch 30a of the switching plate 30 and the position of the locking protrusion 74b of the mist sprinkler plate 70 corresponding to the notch 30a are aligned around the central axis L1 (the state shown in FIG. 18). This insertion is performed up to a position where the outer periphery of the switching plate 30 and the step 74a of the intermediate wall 74 abut against each other.

[0070] After the insertion, the water sprinkler side assembly Aassy and the cover side assembly Bassy are rotated relative to each other about the central axis L1, so that the position of the notch 30a and the position of the locking protrusion 74b are shifted around the central axis L1. Therefore, the outer peripheral edge of the switching plate 30 is sandwiched between the step 74a and the locking protrusion 74b of the mist sprinkler plate 70, and the water sprinkler side assembly Aassy and the cover side assembly Bassy are prevented from slipping out of each other in the direction of the central axis L1.

[0071] With the sprinkler side assembly Aassy and the cover side assembly Bassy secured against disengagement from each other, the outer plate portion 90b of the washer 90 is fitted into each of the notches 58a of the boss 58 of the mist core 50 (see FIG. 10(a)). Also, the inner plate portion 90c of the washer 90 is fitted into the notch 17a of the first boss 17 of the head cover 12 (see FIG. 5).

[0072] A seal ring 91 is interposed between the first boss 17, the washer 90, and the boss 58. The washer 90 is fixed to the cover side assembly Bassy by a screw 152 inserted from the body plate portion 90a of the washer 90 to the boss 58, and the washer 90 prevents the watering side assembly Aassy and the cover side assembly Bassy from slipping out of each other in the direction of the central axis L1.

[0073] There is no gap around the central axis L1 between the notch 17a of the first boss 17 and the inner plate portion 90c of the washer 90 fitted into the notch 17a (see FIG. 5). Therefore, when the cover side assembly Bassy rotates relative to the sprinkler side assembly Aassy about the central axis L1, the washer 90 also rotates integrally with the cover side assembly Bassy. The washer 90 attached to the cover side assembly Bassy is disposed such that the two longer outer plate portions 90b-1 of the three outer plate portions 90b face the corresponding normal sprinkler ports 55 with a gap therebetween (see FIG. 20(a)).

[0074] As shown in Fig. 10(a), a gap is provided around the central axis L1 between the notch 58a of the boss 58 and the outer plate portion 90b of the washer 90 fitted into the notch 58a. Therefore, as shown in Fig. 19, the watering side assembly Aassy and the cover side assembly Bassy can rotate relatively around the central axis L1 within a range defined by the gap.

[0075] As shown in Figures 3, 4 and 18, when the sprinkler side assembly (Aassy) and the cover side assembly (Bassy) are assembled together, the support part 33 of the switching plate 30 is inserted into the partition wall 51 of the mist core 50. The radially inner space of the support part 33 of the switching plate 30 is blocked by the mist core 50 to form a valve chamber 64. The packing 34 attached to the support part 33 ensures watertightness between the support part 33 and the partition wall 51, i.e., the watertightness of the valve chamber 64. Hot and cold water in the common front chamber 19 flows into the valve chamber 64 via the common water passage hole 39.

[0076] The counter portion 38 of the switching plate 30 is disposed in the valve chamber 64. The counter portion 38 is in slidable contact with the back surface of the mist core 50. The large diameter cylindrical portion 41 of the valve body 40 is disposed in the valve chamber 64. The seal ring 43 of the large diameter cylindrical portion 41 of the valve body 40 is slidably pressed against the back surface of the mist core 50 by the biasing force of the coil spring 44. The normal sprinkling port 55 and the mist sprinkling port 56 of the mist core 50 open into the valve chamber 64.

[0077] 19, when the sprinkler side assembly Aassy and the cover side assembly Bassy rotate relative to each other, the valve body 40 rotates relative to the normal sprinkler port 55 and the mist sprinkler port 56. The normal sprinkler port 55 and the mist sprinkler port 56 are disposed on the movement trajectory of the corresponding valve body 40 (seal ring 43).

[0078] As shown in Fig. 16, the normal sprinkler plate 100 has a cylindrical shape with a lid 101 on the front side. A large number of normal fine holes 101a are formed through the lid 101. A flange 102 that protrudes radially outward is provided at the opening edge on the back side of the normal sprinkler plate 100. The normal sprinkler plate 100 is integrally molded by pressing a metal plate such as stainless steel.

[0079] As shown in Fig. 17, the attachment ring 110 is a one-piece molded product made of synthetic resin and has a cylindrical shape. A male thread 110a is provided in the rear side area of ​​the outer circumferential surface of the attachment ring 110. A flange 110b that protrudes radially outward is provided in the front side area of ​​the outer circumferential surface of the attachment ring 110. The flange 110b makes the male thread 110a difficult to see when viewed from the front. A plurality of (three in this embodiment) engagement recesses 110c are provided at equal intervals around the central axis L1 on the front surface of the attachment ring 110.

[0080] 2 to 4, the normal sprinkler plate 100 is inserted from the front side into the accommodation hole 71 of the mist sprinkler plate 70. A seal ring 111 is interposed in the space surrounded by the flange 102 of the normal sprinkler plate 100, the support part 57 of the mist core 50, and the inner wall 72 of the mist sprinkler plate 70. In the annular space between the outer circumferential surface of the normal sprinkler plate 100 and the inner circumferential surface of the accommodation hole 71, an attachment ring 110 is disposed.

[0081] The mounting ring 110 is fixed to the mist sprinkler plate 70 by screwing together the male threads 110a of the mounting ring 110 and the female threads 71a of the accommodation hole 71. In this fixed state, the mounting ring 110 presses the seal ring 111 via the flange 102 of the normal sprinkler plate 100. The normal sprinkler plate 100 is prevented from coming out of the accommodation hole 71 by the flange 102 abutting against the mounting ring 110. The heads of the screws 152 that connect the sprinkler side assembly Aassy and the cover side assembly Bassy are covered by the normal sprinkler plate 100.

[0082] On the front side of the mist core 50, the space radially inward from the support portion 57 is continuous with the space inside the normal sprinkler plate 100 to form a normal front chamber 65. The normal sprinkler port 55 of the mist core 50 is opened in the normal front chamber 65. The normal front chamber 65 is watertight between the valve chamber 64 and the normal front chamber 65 by a seal ring 91 interposed between the washer 90 and the boss 58. The normal front chamber 65 is watertight between the mist front chamber 82 and the normal front chamber 65 by a seal ring 111 interposed in the space surrounded by the normal sprinkler plate 100, the support portion 57, and the inner wall 72.

[0083] As shown in Fig. 2, the ring attachment / detachment jig 200 is an integrally molded product made of synthetic resin. The ring attachment / detachment jig 200 includes an arm 201. A plurality of arms 201 (three in this embodiment) are arranged at equal intervals around a central axis L1. One end of each arm 201 is arranged on the central axis L1, and the arms 201 are integrated by joining their ends together. An engagement protrusion 201a is provided on the other end of each arm 201.

[0084] When removing the mounting ring 110 from the mist sprinkling plate 70, each of the engaging protrusions 201a of the ring removal tool 200 is engaged with the corresponding engaging recesses 110c of the mounting ring 110. Then, in this engaged state, the mounting ring 110 is rotated relative to the mist sprinkling plate 70 in a loosening direction using the ring removal tool 200 as a handle, whereby the screw connection between the mist sprinkling plate 70 and the mounting ring 110 is released.

[0085] When the mounting ring 110 is removed from the mist sprinkler plate 70, the normal sprinkler plate 100 can be removed from the mist sprinkler plate 70. When the normal sprinkler plate 100 is removed, the head of the screw 152 is exposed. By removing the screw 152 from the first boss 17 of the cover side assembly, the washer 90 can be removed from the cover side assembly and the sprinkler side assembly.

[0086] With the washer 90 removed, the sprinkler side assembly Aassy and the cover side assembly Bassy can be rotated relative to each other around the central axis L1 so that the position of the cutout 30a and the position of the locking protrusion 74b are aligned in the direction of the central axis L1, thereby allowing the sprinkler side assembly Aassy and the cover side assembly Bassy to be separated in the direction of the central axis L1.

[0087] Now, as shown in Figure 19 (a), when the sprinkler side assembly Aassy is rotated in one direction around the central axis L1 relative to the cover side assembly Bassy, ​​each valve body 40 closes the corresponding mist sprinkler port 56 and opens the corresponding normal sprinkler port 55.

[0088] Therefore, as shown in Figure 20(a), hot and cold water in the valve chamber 64 flows into the normal front chamber 65 through the normal sprinkler port 55 and is sprayed out through the numerous normal pores 101a in the normal sprinkler plate 100, performing normal sprinkling.

[0089] In addition, the hot and cold water flowing from the normal sprinkler port 55 into the normal front chamber 65 collides with the outer plate portion 90b-1 of the washer 90 facing the normal sprinkler port 55, is redirected in the radial direction, and then travels toward the normal hole 101a inside the normal front chamber 65. Therefore, it is possible to prevent the hot and cold water from the normal sprinkler port 55 from moving linearly toward the normal hole 101a.

[0090] This makes it possible to prevent a large difference in the force of hot and cold water sprayed from some of the normal orifices 101a that face the normal sprinkler port 55 and from the remaining normal orifices 101a that do not face the normal sprinkler port 55, and to prevent a deterioration in the usability of normal sprinklers due to this difference in force. Also, a washer 90 that is attached for another purpose is used to change the direction of the hot and cold water in this way, and no dedicated member is required for this direction change.

[0091] As shown in Figure 19 (b), when the sprinkler side assembly Aassy is rotated in the other direction around the central axis L1 relative to the cover side assembly Bassy, ​​each valve body 40 opens the corresponding mist sprinkler port 56 and closes the corresponding normal sprinkler port 55.

[0092] Therefore, as shown in FIG. 20( b ), hot and cold water in the valve chamber 64 flows into the mist front chamber 82 via the mist sprinkler port 56 , the mist water passage hole 60 and the mist water passage groove 61 .

[0093] As shown in Fig. 14, hot and cold water in the mist anteroom 82 flows into the cylindrical region 80a of the swirl chamber 80 through the mist inlet groove 81. Here, the mist inlet groove 81 extends in the tangential direction of the swirl chamber 80 (cylindrical region 80a). The closer the mist inlet groove 81 is to the cylindrical region 80a, the deeper it is, and conversely, the farther it is from the cylindrical region, the shallower it is. Therefore, the flow of hot and cold water from the mist inlet groove 81 toward the cylindrical region 80a is along the inner circumferential surface of the cylindrical region 80a and forms a spiral vortex toward the truncated cone region 80b in the direction of the central axis L3 of the nozzle portion 77.

[0094] The swirling flow of hot water that reaches the truncated cone region 80b in the swirl chamber 80 moves toward the mist orifice 79 while its swirling radius is gradually reduced in the truncated cone region 80b. The swirling flow of hot water that reaches the mist orifice 79 is sprayed from the mist orifice 79 into the jetting recess 83. The hot water sprayed into the jetting recess 83 becomes a hollow cone-shaped thin water film, coupled with the guide effect of the jetting recess 83 having a conical inner surface shape. The thin water film is broken up into mist (atomic particles) by film splitting, and becomes mist spray.

[0095] The above embodiment provides the following advantages. (1) The mist introduction groove 81 extends in the tangential direction of the swirl chamber 80, and is deeper as it approaches the cylindrical region 80a and shallower as it is farther from the cylindrical region, thereby generating a swirling flow toward the mist orifice 79 in the swirl chamber 80. In other words, even if a mist guide formed in a conical spiral shape is not disposed in the swirl chamber 80 as in the past, a spiral swirling flow can be effectively generated in the swirl chamber 80. Therefore, unlike the past, the mist guide no longer impedes the flow of hot water, and the momentum of the hot water can be maintained until it is sprayed from the mist sprinkler plate 70, so a high cleaning effect can be expected.

[0096] (2) A mist inlet groove 81 is provided on the back surface of the mist sprinkler plate 70, and a mist protrusion 62 is provided on the front surface of the mist core 50, and the mist inlet groove 81 and the mist protrusion 62 define and form an entrance portion to the swirl chamber 80. Therefore, compared to when the entrance portion is formed by a through hole, manufacturing is easier, and it is easier to set the cross-sectional area of ​​the entrance portion, i.e., the flow rate of hot and cold water flowing into the swirl chamber 80.

[0097] (3) Since there is no need to form the mist convex portion 62 in a conical spiral shape as in the mist guide of the prior art, the shape of the mist convex portion 62 is simplified, and the mist core 50 can be manufactured easily.

[0098] (4) The mist convex portion 62 and the insertion hole 78 of the nozzle portion 77 are in contact with each other at their respective tapered surfaces 62a, 78a. Therefore, the mist convex portion 62 and the insertion hole 78 can be brought into surface contact with a weak force, ensuring watertightness at the contact portion. This reduces the amount of hot water flowing from the mist antechamber 82 into the swirl chamber 80 without passing through the mist introduction groove 81, suppressing the generation of turbulence in the swirl chamber 80 due to this intrusion. The turbulence disrupts the swirling flow in the nozzle portion 77 (swirl chamber 80), and thus inhibits the film-like breakup of the hot water sprayed from the nozzle portion 77.

[0099] (5) The mist convex portion 62 closes the mist introduction groove 81 with the tapered surface 62a to define the entrance portion to the swirl chamber 80 (cylindrical region 80a). Therefore, the direction of the hot water to the swirl chamber 80 at the entrance portion is clearer, and the swirl speed of the vortex flow in the swirl chamber 80 can be increased. When the swirl speed is high, the film breakup of the hot water sprayed from the nozzle portion 77 is improved, resulting in fine mist particle size, and a high cleaning effect can be expected.

[0100] (6) The mist protrusion 62 is provided with a swirl assist chamber 63 having an inner diameter smaller than that of the swirl chamber 80. When a swirling flow of hot and cold water occurs in the swirl chamber 80, a swirling flow of hot and cold water occurs in the swirl assist chamber 63 with an outer diameter smaller than that of the swirling flow in the swirl chamber 80. The swirling flow in the swirl assist chamber 63 helps define the virtual axis of the swirling flow in the swirl chamber 80, stabilizing the swirling flow of hot and cold water in the swirl chamber 80. Therefore, the film-like breakup of the hot and cold water sprayed from the nozzle portion 77 is favorable, resulting in fine mist particle size, and a high cleaning effect can be expected.

[0101] (7) A counter portion 38 is provided on the front side of the switching plate 30, and the counter portion 38 is in slidable contact with the back side of the mist core 50 inside the valve chamber 64. Therefore, even if multiple valve bodies 40 are arranged at unequal intervals around the central axis L1, the counterbalance action of the counter portion 38 stabilizes the sliding between each valve body 40 and the back side of the mist core 50. This allows for stable relative rotation between the switching plate 30 and the mist core 50, i.e., switching between normal watering and mist watering.

[0102] (8) The direction of the entrance of the common water hole 39 toward the upstream side (back side) is along the circumferential direction of the inner surface of the storage section 14 of the head cover 12. Therefore, hot and cold water that flows from the common water passage 20 into the common front chamber 19 and flows in a direction along the inner surface can be effectively guided into the common water hole 39.

[0103] (Another example) The above embodiment may be modified as follows. (1) There shall be one mist inlet groove.

[0104] (2) The number of mist introduction grooves shall be two, four, five, etc., other than three.

[0105] (3) The bottom surface of the mist introduction groove must be flat.

[0106] (4) The mist introduction grooves 81 are arranged at unequal intervals around the central axis L3 of the nozzle portion 77.

[0107] (5) The insertion hole 78 of the nozzle portion 77 does not have a tapered surface 78a, and the tip of the mist convex portion 62 does not have a tapered surface 62a.

[0108] (6) The multiple mist convex portions 62 are separate from each other.

[0109] (7) The rotation assist chamber 63 is removed from the mist convex portion 62.

[0110] (8) To embody the present invention in a shower head that can perform both normal water spray and mist spray at the same time.

[0111] (9) To be embodied in a shower head that only sprays mist.

[0112] (10) The showerhead 1 in the above embodiment is a so-called wall-mounted type, but it can be modified to embody a so-called wall-fixed or wall-embedded type showerhead.

[0113] (11) One mist convex portion 62 and one nozzle portion 77 corresponding to the mist convex portion 62 are regarded as the smallest unit of a mist spraying device, and one or more such mist spraying devices are installed directly on the wall surface of a bathroom, sauna room, etc.

[0114] (12) As shown in Figures 21 and 22, the mist convex portion 62 is separate from the mist core 50. The mist convex portions 62 are arranged at equal intervals on an imaginary circle C centered on the central axis L1 and are integrally connected in a ring shape by a connecting portion 66. The central portion between each of the mist convex portions 62 of the connecting portion 66 is curved radially outward from the imaginary circle C connecting each of the mist convex portions 62, and the portion connecting each of the mist convex portions 62 is curved radially inward, forming a smooth, wavy curve. Therefore, for example, the connecting portion 66 is more easily elastically deformed than when the connecting portion 66 is an arc shape that coincides with the imaginary circle C. Therefore, when the tip of the mist convex portion 62 is inserted into the insertion hole 78 of the nozzle portion 77 (see FIG. 15), the position of the mist convex portion 62 relative to the insertion hole 78 is corrected by the elastic deformation of the connecting portion 66, and uneven contact between the tapered surfaces 62a, 78a can be suppressed. In addition, a convex curved surface portion 62b is provided at the center of the back surface of the mist convex portion 62. In the mist core 50, a flat portion 67 is provided at a position corresponding to the mist convex portion 62. Therefore, the convex curved surface portion 62b is in point contact with the flat portion 67. Therefore, when the mist core 50 is attached to the mist sprinkling plate 70 (the mist convex portion 62 is pressed by the mist core 50), the mist convex portion 62 can be tilted, so uneven contact between the tapered surfaces 62a, 78a can be suppressed.

[0115] (Additional Note) The technical concept that can be understood from the above embodiment will be described. a normal sprinkler plate (mist core) having an insertion hole (first insertion hole) and a normal sprinkler port, the boss of the showerhead body being inserted into the insertion hole so that the normal sprinkler plate can rotate relatively to the showerhead body around the boss; a normal sprinkler plate which defines a normal antechamber between itself and the disk and sprays hot and cold water into the normal antechamber; and a washer which is disposed in the normal antechamber and fixed to the boss and which defines the range of relative rotation between the showerhead body and the disk by abutting against the disk. The valve body opens and closes the normal sprinkler port by rotating the showerhead body and the disk relative to each other, and the washer is disposed opposite the opening of the normal sprinkler port in the normal antechamber.

[0116] (2) A showerhead comprising: a showerhead body constituting an outer shell and having a boss (first boss) on its inner surface; a switching plate fixed to the showerhead body and having a plurality of valve accommodating sections arranged at unequal intervals around the central axis of the boss; a plurality of valve bodies respectively accommodated in the plurality of valve accommodating sections; and a circular plate (mist core) having an insertion hole (first insertion hole) and a normal watering port, the boss of the showerhead body being inserted into the insertion hole and rotatable relative to the showerhead body around the boss, wherein the valve bodies open and close the normal watering port by rotating the showerhead body and the circular plate relative to each other, and wherein the switching plate has a counter portion protruding from the wider of the unequal intervals of the valve accommodating sections so as to be slidable relative to the circular plate.

[0117] (3) A mist sprinkler system comprising a mist sprinkler plate which spouts hot and cold water toward the front side and a mist core fixed to the back side of the mist sprinkler plate, the mist sprinkler plate being provided with a nozzle section, the nozzle section having an insertion hole opened on the back side of the mist sprinkler plate, a mist orifice opened on the front side of the mist sprinkler plate, a swirling chamber having a cylindrical region disposed between the insertion hole and the mist orifice, and a mist inlet groove provided around the insertion hole on the back side of the mist sprinkler plate from a region radially outside the opening edge of the insertion hole to the cylindrical region of the swirling chamber, the mist core being provided with a mist inlet groove. a mist introduction groove having a cross-sectional area defined by an inner surface of the mist introduction groove and the mist convex portion, the mist introduction groove extending in a tangential direction of the cylindrical region and being inclined so as to become deeper as it approaches the cylindrical region and conversely become shallower as it moves away from the cylindrical region, and furthermore, the mist introduction groove, when viewed from the rear of the mist spray plate, is narrower as it approaches the insertion hole and wider as it moves away from the insertion hole. [Explanation of symbols]

[0118] 1...Shower head, 2...Head, 3...Handle 11... shower head body, 12... head cover, 13... handle cover (a... male thread, b... female thread, c... storage section, d... anti-rotation), 14... storage section (a... lid), 15... connecting section (a... male thread, b... anti-rotation), 16... partition wall, 17... first boss (a... cutout), 18... second boss, 19... common antechamber 20...common water passage, 21...filter cartridge, 22...seal ring 30...switching plate (a...notch), 31...insertion portion (a...seal receiving groove), 32...seal ring, 33...support portion, 34...packing, 35...first insertion hole, 36...second insertion hole, 37...valve receiving portion, 38...counter portion, 39...common water passage hole (a...cylindrical portion, a-1...first wall, a-2...second wall, a-3...third wall, a-4...fourth wall) 40... valve body, 41... large diameter cylindrical portion (a... seal receiving groove), 42... small diameter cylindrical portion (a... spring receiving portion), 43... seal ring, 44... coil spring 50... mist core (a... engagement groove), 51... partition wall (a... seal receiving groove), 52... seal ring, 53... first insertion hole, 54... second insertion hole, 55... normal watering port, 56... mist watering port, 57... support portion, 58... boss (a... notch), 59... water passage hole forming portion 60: mist water passage hole, 61: mist water passage groove, 62: mist convex portion (a: tapered surface, b: convex curved surface portion), 63: rotation auxiliary chamber, 64: valve chamber, 65: normal front chamber, 66: connection portion, 67: flat portion 70... mist sprinkler plate (a... engagement rib), 71... accommodation hole (a... female thread), 72... inner wall (a... notch), 73... outer wall (a... knob), 74... intermediate wall (a... step, b... locking projection), 75... boss, 77... nozzle portion, 78... insertion hole (a... tapered surface), 79... mist hole 80... Swirling chamber (a... cylindrical region, b... truncated cone region), 81... Mist introduction groove, 82... Mist front chamber, 83... Spouting recess 90...Washer (a...Body plate, b...Outer plate, c...Inner plate), 91...Seal ring 100...normal water sprinkler plate, 101...lid (a...normal fine hole), 102...flange 110... mounting ring (a... male thread, b... flange, c... engagement recess), 111... seal ring 150...screw, 151...screw, 152...screw 200: ring attachment / detachment jig, 201: arm (a: engagement protrusion) Aassy...Watering side assembly, Bassy...Cover side assembly C: Virtual circle L1: central axis of head, L2: central axis of handle, L3: central axis of nozzle

Claims

[Claim 1] A showerhead body that forms an outer shell and has a boss on an inner surface; a switching plate having a valve housing portion and fixed to the showerhead body; A valve body accommodated in the valve accommodating portion; a circular plate having an insertion hole and a normal water spray port, the boss of the shower head body being inserted into the insertion hole so that the circular plate can rotate relatively to the shower head body around the boss; A normal water sprinkler plate which divides a normal front chamber between the circular plate and the normal front chamber and spouts hot and cold water into the normal front chamber; a washer disposed in the normal anteroom and fixed to the boss, the washer abutting against the disk to define a range of relative rotation between the shower head body and the disk, The valve body opens and closes the normal watering port by rotating the shower head body and the disk relative to one another. The washer is disposed opposite the opening of the normal watering port in the normal anteroom of the shower head.

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