JP2023167455A - Mist generator and mist generator using the same - Google Patents

Abstract

To provide a mist generator capable of facilitating generation of a spiral flow in a mist passage by forming the spiral mist passage which has a closed section structure.SOLUTION: A mist generator 1 comprises: a first member 2 having a recess 3; and a second member 4 having a projected part 5 received in the recess 3 of the first member 2. A spiral mist passage is provided between the recess 3 of the first member 2 and the projected part 5 of the second member 4. The mist passage has a closed section structure surrounded by the inner peripheral surface 11 of the recess 3 of the first member 2, a downward slope upper surface 12b projected from the inner peripheral surface 11 toward a downward side forming the lower surface of the passage, the outer peripheral surface 22 of the projected part 5 of the second member 4, and a downward slope lower surface 23b projected from the outer peripheral surface 22 toward a downstream side forming the upper surface of the passage.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mist generating device that can be installed in a shower head used in a bathroom or the like or a shower head attached to a water faucet, and a shower head using the mist generating device.

Conventionally, this type of mist generator includes a mist guide in which a conical spiral surface is formed, and a mist ring body having a conical mist aperture into which the mist guide is inserted. There is known a device in which a spiral mist flow path is formed between the spiral surface of a mist guide disposed in the air and the conical inner circumferential surface of a mist throttle hole (Patent Document 1).

Patent No. 6717991 (see paragraph 0163, Figure 52, Figure 57)

However, in the mist generating device described in Patent Document 1, since the mist flow path is formed between the spiral surface of the mist guide and the conical inner peripheral surface of the mist aperture hole, the mist aperture is There was a possibility that spiral flow would be difficult to generate on the inner peripheral surface side of the hole.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a mist generating device in which a spiral flow is easily generated in the mist flow path by forming a spiral mist flow path having a closed cross-sectional structure.

The mist generating device of the present invention includes a first member having a recess, and a second member having a convex part accommodated in the recess of the first member, wherein the concave part of the first member and the convex part of the second member are connected to each other. A spiral mist flow path is provided between the first member, and the mist flow path is connected to the inner peripheral surface of the recess of the first member, the downward sloped upper surface that protrudes from the inner peripheral surface and forms the lower surface of the flow path, and the first member. It has a closed cross-sectional structure surrounded by the outer circumferential surface of the convex portion of the two members and a downwardly inclined lower surface that protrudes from the outer circumferential surface and forms the upper surface of the flow path.

The shower head of the present invention includes the above-mentioned mist generating device, and a plurality of mist generating devices are arranged along the outer periphery of the jetting portion of the shower head.

According to the mist generator of the present invention, the spiral mist flow path is provided between the recess of the first member and the projection of the second member, and the mist flow path has a closed cross-sectional structure. Inside, water flows smoothly along the spiral flow path, making it easier to generate a swirling spiral flow.

Moreover, according to the shower head of the present invention, mist can also be used in a shower head used in a bathroom or the like, or a shower head attached to a water faucet.

FIG. 2 is an exploded perspective view of the mist generator. (a) is a bottom view of the second member that constitutes the mist generator, and (b) is a plan view of the first member that constitutes the mist generator. It is a longitudinal cross-sectional view showing one cross-sectional shape of a mist generating device. FIG. 3 is an enlarged cross-sectional view showing one cross-sectional shape of the mist flow path of the mist generator. FIG. 2 is a schematic diagram showing how mist is generated within the mist generator. FIG. 2 is an exploded view of a shower head incorporating a mist generator. FIG. 2 is a sectional view of a shower head incorporating a mist generator. It is a perspective sectional view when incorporating a mist generating device into a shower head. It is another shower head incorporating a mist generating device, and is a sectional view when mist is generated. It is another shower head incorporating a mist generating device, and is a sectional view when a straight water flow is generated. It is a bottom view of another shower head incorporating a mist generating device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a mist generating device of the present invention will be described based on embodiments with reference to the drawings. Note that the drawings schematically represent each component of the mist generating device, and the dimensions and dimensional ratios of the actual product do not necessarily match the dimensions and dimensional ratios on the drawings. Further, unless otherwise specified, in this specification, for convenience, directions such as up and down, left and right are expressed based on the orientation of the mist generator shown in FIG. Furthermore, duplicate explanations may be omitted as appropriate, and the same members may be denoted by the same reference numerals.

1 to 4 show the internal structure and cross-sectional structure of a mist generator according to this embodiment. The mist generator 1 includes a first member 2 having a recess 3 and a second member 4 having a protrusion 5 accommodated in the recess 3 of the first member 2. By incorporating the second member 4 into the first member 2, a spiral mist channel 6 is formed between the recess 3 of the first member 2 and the protrusion 5 of the second member 4.

The first member 2 is made of a cylindrical body, and a cylindrical recess 3 and a conical space 9 continuing from the recess 3 are formed inside the cylindrical body. A step portion is provided at the boundary between the recessed portion 3 and the space portion 9, and a horizontal surface 15 is formed in the step portion. The space 9 has a tapered shape toward the lower end, and a mist outlet 10 leading to the outside is provided at the lower end. Note that the mist outlet 10 has a constant length.

The recess 3 provided in the first member 2 has a circular planar shape. The curved inner peripheral surface 11 forming the recess 3 is provided with a lower protrusion 12 that protrudes in the radial direction. The lower protrusion 12 is a protrusion having a substantially triangular front shape, and includes a vertical side surface 12a, an inclined upper surface 12b, and a triangular inner circumferential surface extending vertically downward from an edge 13b of the inclined upper surface 12b. 12c. The inclined upper surface 12b forms the lower surface of the above-mentioned mist channel 6, and is inclined downward toward the downstream side of the mist channel 6. The protrusion width of the lower protrusion 12 is approximately the same as the width of the horizontal surface 15 of the stepped portion. Therefore, the inner circumferential surface 12c of the lower protrusion 12 smoothly connects to the upper end of the inner circumferential surface 14 that forms the conical space 9.

The lower protrusion 12 is provided on a part of the inner peripheral surface 11 of the recess 3 in the circumferential direction, and has a length of about 1/4 of the total circumference in this embodiment. Therefore, the inclined upper surface 12b has a shape that is curved inward along the circumferential direction. A pair of lower projections 12 are provided on the inner circumferential surface 11 of the recess 3 and are arranged at positions facing each other. Each inclined upper surface 12b of the pair of lower projections 12 is inclined in the same direction with respect to the circumferential direction of the recess 3.

The sloping upper surface 12b extends from approximately the upper end of the cylindrical body to the horizontal surface 15 of the stepped portion with approximately the same width. Further, the inclined upper surface 12b is inclined downward from the edge 13a of the inner circumferential surface 11 of the recess 3 toward the edge 13b of the inner circumferential surface 12c. That is, the sloped upper surface 12b slopes downward in both the length direction and the width direction, making it easy to generate a spiral flow toward the center of the recess 3 with respect to the water flowing through the mist channel 6. .

In this embodiment, a rectifying protrusion 16 is provided in the recess 3 of the first member 2 adjacent to the pair of lower protrusions 12 . The rectifying protrusion 16 serves as a rectifying means for the flowing water flowing down the mist channel 6, and protrudes from the inner circumferential surface 11 in the radial direction of the recess 3, and is connected to the inclined upper surface 12b across the flat portion 15 of the stepped portion. It has a rectifying surface 17 facing the. The rectifying surface 17 is curved along the upper end of the inner circumferential surface 14 of the space 9 and forms a slope 17a on the flat surface 15 of the stepped portion. The upper surface portion has a rear upper surface portion 18a that is slightly downwardly inclined, and a crescent-shaped planar front upper surface portion 18b. The rectifying protrusion 16 applies the flowing water flowing down the mist channel 6 to the rectifying surface 17 via the flat surface 15, and smoothly guides the water into the space 9 without stagnation, thereby forming a spiral spiral. It forms a flow.

The second member 4 has a head 20 that covers the upper surface 2a of the cylindrical body of the first member 2, and a convex portion 5 that is accommodated in the recess 3 of the first member 2. The head 20 has a circular outer shape with a diameter slightly smaller than that of the first member 1 in a plan view, and when the lower surface 20a is placed on the upper surface 2a of the first member 2, the two become integrated. Further, a pair of water outlets 21 are provided on the side surface 20b of the head 20 at opposing positions. The convex portion 5 of the second member 4 protrudes from the lower surface 20a of the head 20.

The protrusion 5 has a substantially inverted truncated cone shape, and an upper protrusion 23 is provided on the outer circumferential surface 22 of the protrusion 5 and extends in a band shape in the circumferential direction of the protrusion 5 . The upper protrusion 23 is provided along the circumferential direction of the outer circumferential surface 22 over approximately half the circumference from one water outlet 21 to the other water outlet 21 . The upper protrusion 23 is a substantially inverted trapezoidal protrusion when viewed from the front, and has a substantially inverted trapezoidal shape that extends vertically upward from a vertical side surface 23a, an inclined lower surface 23b, and one edge 24b of the inclined lower surface 23b. It has an outer peripheral surface 23c and a bottom surface 23d. The inclined lower surface 23b forms the upper surface of the above-mentioned mist channel 6, and is inclined downward toward the downstream side of the mist channel 6. The bottom surface 23d consists of an inclined surface and a flat surface corresponding to the shape of the upper surface of the rectifying protrusion 16.

The protrusion width of the upper protrusion 23 is approximately the same as that of the lower protrusion 12. The inclined lower surface 23b extends in the circumferential direction from one end of the water outlet 21 along the outer circumferential surface 22 of the convex portion 5. The angle of inclination of the lower sloped surface 23b in the circumferential direction is approximately the same as that of the upper sloped surface 12b. Further, the lower sloped surface 23b is inclined upward from the edge 24a of the convex portion 5 with the outer circumferential surface 22 toward the edge 24b of the outer circumferential surface 23c. That is, the sloped lower surface 23b slopes downward in the length direction, and slopes upward in the width direction.

Further, the outer diameter dimension of the outer circumferential surface 23c of the upper protrusion 23 is almost the same as the inner diameter dimension of the inner circumferential surface 11 of the recess 3 of the first member 2, and the outer diameter dimension of the outer circumferential surface 22 of the second member 4. is approximately the same as the inner diameter dimension of the inner circumferential surface 12c of the lower protrusion 12. Therefore, when the convex portion 5 of the second member 4 is accommodated in the concave portion 3 of the first member 2, as shown in FIG. They are parallel to each other at a constant inclination angle, and the inner circumferential surface 11 of the concave portion 3 of the first member 2 and the outer circumferential surface 22 of the convex portion 5 of the second member 4 are parallel to each other in a perpendicular direction. A spiral mist flow path 6 having a closed cross-sectional structure surrounded by these four surfaces is formed. Note that a pair of upper protrusions 23 are provided at mutually opposing positions on the outer circumferential surface 22, corresponding to the lower protrusions 12.

By assembling the second member 4 to the first member 2, a mist generating device 1 having a spiral mist channel 6 therein is formed. As shown in FIG. 5, water flowing into each mist channel 6 from a pair of water flow ports 21 provided in the second member 4 flows down the spiral mist channel 6, and then flows through the step portion. They swirl and mix with each other in the space 9 via the plane part 15 and the rectifying protrusion 16, forming a spiral spiral flow S whose diameter gradually decreases.

When assembling the second member 4 to the first member 2, the protrusion 5 of the second member 4 is inserted into the recess 3 of the first member 2, and the positioning The rotation direction is determined by fitting the pair of projections 19a into a pair of notches 19b provided in a part of the upper projection 23 of the second member 4. In this state, the second member 4 is pushed in and the lower surface 20a of the head 20 of the second member 4 is brought into close contact with the upper surface 2a of the first member 2, thereby determining the position in the vertical direction. When pushing in the second member 4, the outer circumferential surface 23c of the upper protrusion 23 protruding from the outer circumferential surface 22 of the convex portion 5 of the second member 4 is brought into close contact with the inner circumferential surface 11 of the recess 3 of the first member 2. The inner circumferential surface 12c of the lower protrusion 12 protruding from the inner circumferential surface 11 of the recess 3 of the first member 2 is brought into close contact with the outer circumferential surface 22 of the second member 4. Since these all form vertical surfaces, the adhesion is good, and the mist flow path 6 having a closed cross-sectional structure formed using these surfaces also has high watertightness.

In the mist generator 1 in which the spiral mist flow path 6 is formed in this way, water flows into each mist flow path 6 from the pair of water flow ports 21 provided in the second member 4, and the mist flow A swirling force is applied while flowing down the channel 6. As shown in FIG. 5, the water flowing down the mist channel 6 flows along the rectifying surface 17 of the rectifying protrusion 16 and reaches the downstream space 9 while forming a streamline without stagnation. . Since the space 9 is formed in a conical shape, the water force gradually increases, forming a spiral flow S that gradually reduces in diameter. This spiral flow S is injected into the outside air as a thin water film from a mist outlet 10 provided at the lower end of the mist generator 1, and drips as a mist.

6 to 8 show a shower head 30 incorporating the above-described mist generating device 1. This shower head 30 can be used, for example, in a bathroom or a shower room, and includes a handle 31 attached to the tip of a shower hose (not shown) and a head section 32 provided at the tip of the handle 31. We are prepared. An elongated water pipe 33 is arranged inside the handle 31 to send hot water supplied from a shower hose to the head portion 32.

The head portion 32 has a jetting portion 34 on the front surface and a dome-shaped covering portion 35 on the rear portion. A large number of ejection protrusions 36 are arranged in the center of the ejection part 34, and the mist generating device 1 is arranged so as to surround them. A cover case 37 is attached to the spouting part 34. A large number of ejection holes 38 are provided on the bottom surface 37a of the cover case 37 at positions corresponding to the arrangement of the ejection protrusions 36, and when the cover case 37 is attached, the tips of the ejection protrusions 36 protrude from the ejection holes 38.

The first member 2 of the mist generator 1 is provided inside the bottom surface 37a of the cover case 37 so as to surround the jet hole 38. The first member 2 is formed integrally with the cover case 37, and is arranged in large numbers around the ejection hole 38. The tip of the mist outlet 10 of the first member 2 is open in the bottom surface 37a of the cover case 37. A large number of second members 4 of the mist generating device 1 are provided on a ring-shaped sheet member 39, and are arranged in correspondence to the number of the first members 2 arranged. Note that the configurations of the first member 2 and the second member 4 are almost the same as the configuration of the mist generator 1 described above, except that a large number of members are arranged.

Inside the head portion 32, an outlet 40 for supplying water to the jetting portion 34 and a water receiving receiver 41 for supplying water to the mist generating device 1 are arranged. A seal is formed between the outlet 40 and the water receiver 41, and water supplied to the head portion 32 is passed to either one. Switching between the two is performed by rotating the cover case 37. The water passed to the water flow receiver 41 side is supplied to the plurality of mist generators 1 and is sprayed from the mist outlet 10 of each mist generator 1.

When attaching the cover case 37 to the head section 32, place the sheet member 39 on the first member 2 of the mist generator 1, align the second member 4, and attach the cover case 37 to the head section 32 in this state. . The mounting means screws together a female threaded portion 43 provided on the inner peripheral surface of the cover case 37 with a male threaded portion 42 provided on the outer peripheral surface of the head portion 32 . Thereby, one surface of the sheet member 39 can be brought into pressure contact with the water passage receiver 42, and the assembly of the first member 2 and the second member 4 can be ensured.

A shower head 50 attached to a water faucet 49 is shown in FIGS. 9 to 11. This shower head 50 includes a cylindrical main body part 51 that is fixed to the tip of the faucet 49 by screwing, and a water sprinkling part 52 provided below the main body part 51. The water sprinkling section 52 has a straight spout 53 in the center, and has a plurality of mist spouts 54 arranged in a ring shape outside the straight spout 53. The straight spout 53 is provided with grid-like ribs 53a and 53b. The ribs 53a and 53b have the function of rectifying the straight flow discharged from the straight spout 53. On the other hand, the mist water spouting section 54 includes a mist outlet 54a provided on the bottom surface of the cover case 61, and a mist generator 1 disposed above the mist outlet 54a. The mist outlet 54a is formed of a small circular hole and sprays the mist supplied from the mist generator 1. Further, a plurality of mist generators 1 are arranged along the outer periphery of a straight spout 53 provided at the center of the lower part of the shower head 50.

An inlet 55 for water supplied from the faucet 49 is provided at the upper part of the main body part 51, and an outlet 56 for water is provided at the lower part. Further, a water passage 57 is formed between the inlet 55 and the outlet 56. Note that the outflow port 56 is composed of a plurality of openings provided in the side wall of the main body portion 51.

A water spouting flow switching section 58 that switches between the straight water spout 53 and the mist water spouting section 54 of the water sprinkling section 52 is provided on the outer peripheral side of the main body section 51 so as to surround the main body section 51 . This water flow switching section 58 includes a switching valve 59 that switches the outlet 56 of the main body section 51, and is integrated with the cover case 61 via a cylindrical member 60 that forms the outer peripheral wall of the switching valve 59. and slide the outside of the outlet 56 up and down.

The second member 4 of the mist generator 1 is provided integrally with the cylindrical member 60 at the lower part of the cylindrical member 60 . Further, the first member 2 of the mist generator 1 is provided integrally with the cover case 61 . The convex portion of the second member 4 is accommodated in the concave portion of the first member 2 . Furthermore, as described above, the mist outlet 54a is provided in the cover case 61 below the recess of the first member 2. Note that the configurations of the first member 2 and the second member 4 in this embodiment are almost the same as the configuration of the mist generator 1 described above.

In this shower head 50, the straight discharge port 53 and the mist discharge portion 54 can be easily switched by sliding the cover case 61 up and down. As shown in FIG. 9, by sliding the cover case 61 downward, the water flow switching section 58 slides downward together with the cover case 61. At this time, the switching valve 59 of the water flow switching unit 58 seals the outer wall of the main body 51 at a position below the outlet 56 provided in the main body 51. As a result, water flowing into the main body 51 from the faucet 49 is supplied from the outlet 56 to the plurality of mist generators 1 via the outer space 62, as shown by arrow A, and is arranged in each mist generator 1. The mist is sprayed from the mist outlet 54a.

On the other hand, as shown in FIG. 10, by sliding the cover case 61 upward, the water flow switching section 58 slides upward together with the cover case 61. At this time, the switching valve 59 of the water flow switching unit 58 seals the outer wall of the main body 51 at a position above the outlet 56 provided in the main body 51. As a result, the water flowing into the main body 51 from the faucet 49 is sprayed from the straight outlet 53 in the center through the outlet 56, through the inner spaces 63 and 64, as shown by arrow B. At this time, due to the synergistic effect of the ribs 53a and 53b provided at the straight discharge port 53, a straight water discharge flow is obtained in a rectified state.

In this way, the shower head 50 of the present invention, which is attached to the water faucet 49, can be used by switching to mist during the rinsing process of washing dishes. The strong water force generated by the mist provides a washing effect better than that of shower water, and it also saves water because the flow rate is lower than that of shower water.

The first member of the mist generator according to the present invention has a recess, and the second member has a convex portion accommodated in the recess of the first member. Further, a spiral mist flow path is provided between the recess of the first member and the projection of the second member. The mist flow path includes an inner circumferential surface of the concave portion of the first member, an upper surface inclined downward toward the downstream side that protrudes from the inner circumferential surface and forms a lower surface of the flow path, and an outer circumferential surface of the convex portion of the second member. and a lower surface slanted downward toward the downstream side that protrudes from the outer circumferential surface and forms the upper surface of the flow path.

The sloped upper surface slopes downward in the width direction from the inner circumferential surface of the concave portion of the first member, and the sloped lower surface slopes upward in the width direction from the outer peripheral surface of the convex portion of the second member. Further, the inclined upper surface and the inclined lower surface extend parallel to each other toward the downstream side.

The inclined upper surface is provided on a circumferential part of the inner circumferential surface of the recess of the first member, and the inclined lower surface is provided on a circumferential part of the outer circumferential surface of the convex part of the second member. The upper surface and the inclined lower surface are arranged at the same position in the circumferential direction. For example, a pair of the inclined upper surfaces are provided at positions facing each other in the circumferential direction of the inner circumferential surface of the concave portion of the first member, and the inclined lower surfaces are provided at positions facing each other in the circumferential direction of the outer circumferential surface of the convex portion of the second member. A pair is provided at each location.

An inner circumferential surface extending downward from an edge of the inclined upper surface is formed inside the inner circumferential surface of the concave portion of the first member, and an inner circumferential surface extending downward from the edge of the inclined upper surface is formed outside the outer circumferential surface of the convex portion of the second member. An outer circumferential surface extending upward from the edge is formed, the outer circumferential surface of the second member is formed on the inner circumferential surface of the concave portion of the first member, and the inner circumferential surface of the first member is formed on the outer circumferential surface of the convex portion of the second member. The surfaces are brought into close contact with each other. Further, the inner circumferential surface and inner circumferential surface of the concave portion of the first member and the outer circumferential surface and outer circumferential surface of the convex portion of the second member extend vertically to each other.

Furthermore, a flowing water rectifying means is provided near the downstream side of the spiral mist channel. Further, a conical space is formed on the downstream side of the spiral mist channel, and a mist outlet is provided at the lower end of the space.

1 Mist generator
2 First member
2a Top surface
3 Recess
4 Second member
5 Convex part
6 Mist channel
9 Space part
10 Mist outlet
11 Inner peripheral surface
12 Lower protrusion
12a Side
12b Slanted top surface
12c Inner circumferential surface
13a, 13b edge
14 Inner peripheral surface of space
15 Horizontal plane
16 Rectifying protrusion
17 Rectifying surface
17a slope
18a Rear upper surface part
18b Front upper surface part
19a Positioning protrusion
19b Notch
20 head
20a Bottom surface
20b side
21 Water outlet
22 Outer peripheral surface
23 Upper protrusion
23a Side
23b Slanted lower surface
23c Outer circumferential surface
24a, 24b edge
30 Shower head
31 Handle
32 Head part
33 Water pipe
34 Spout part
35 Covering part
36 Eruption process
37 Cover case
37a Bottom
38 Spout hole
39 Sheet member
40 outlet
41 Water receiver
42 Male thread
43 Female thread
S spiral flow
49 Faucet
50 shower head
51 Main body
52 watering section
53 Straight spout
53a, 53b ribs
54 Mist discharge section
54a Mist outlet
55 Inlet
56 Outlet
57 Waterway
58 Discharge flow switching section
59 Switching valve
60 Cylindrical member
61 Cover case
62 Outside space
63, 64 Inner space part

The mist generating device of the present invention includes a first member having a concave portion, and a second member having a convex portion accommodated in the concave portion of the first member, and a side of the second member where the convex portion is formed. When the first member and the second member are combined with the convex portion of the second member as the lower side, a spiral mist flow path is formed between the concave portion of the first member and the second member . The mist flow path is provided between the convex portion of the first member and the inner circumferential surface of the concave portion of the first member, and an upper surface slanted downward toward the downstream side that protrudes from the inner circumferential surface and forms a lower surface of the flow path. , has a closed cross-sectional structure surrounded by the outer circumferential surface of the convex portion of the second member and a downwardly inclined lower surface toward the downstream side that protrudes from the outer circumferential surface and forms the upper surface of the flow path.

The protrusion width of the upper protrusion 23 is approximately the same as that of the lower protrusion 12. The inclined lower surface 23b extends in the circumferential direction from one end of the water outlet 21 along the outer circumferential surface 22 of the convex portion 5. The inclination angle of the inclined lower surface 23b in the circumferential direction is approximately the same as that of the inclined upper surface 12b. Further, the inclined lower surface 23b is inclined upward from an edge 24a of the convex portion 5 with the outer circumferential surface 22 toward an edge 24b of the outer circumferential surface 23c. That is, the sloped lower surface 23b slopes downward in the length direction, and slopes upward in the width direction.

Further, the outer diameter dimension of the outer circumferential surface 23c of the upper protrusion 23 is almost the same as the inner diameter dimension of the inner circumferential surface 11 of the recess 3 of the first member 2, and the outer diameter dimension of the outer circumferential surface 22 of the second member 4. is approximately the same as the inner diameter dimension of the inner circumferential surface 12c of the lower protrusion 12. Therefore , when the convex part 5 of the second member 4 is accommodated in the concave part 3 of the first member 2, as shown in FIG. They are parallel to each other at a constant inclination angle, and the inner circumferential surface 11 of the concave portion 3 of the first member 2 and the outer circumferential surface 22 of the convex portion 5 of the second member 4 are parallel to each other in a perpendicular direction. A spiral mist flow path 6 having a closed cross-sectional structure surrounded by these four surfaces is formed. Note that a pair of upper protrusions 23 are provided at mutually opposing positions on the outer circumferential surface 22, corresponding to the lower protrusions 12.

Claims (11)

A first member having a concave portion, and a second member having a convex portion accommodated in the concave portion of the first member,
A spiral mist flow path is provided between the concave portion of the first member and the convex portion of the second member,
The mist channel includes an inner circumferential surface of the concave portion of the first member, an upper surface inclined downward toward the downstream side that protrudes from the inner circumferential surface and forms a lower surface of the channel, and an outer periphery of the convex portion of the second member. A mist generating device that has a closed cross-sectional structure surrounded by a lower surface that projects from the outer peripheral surface and that slopes downward toward the downstream side and forms the upper surface of the flow path. The inclined upper surface is inclined downward in the width direction from the inner circumferential surface of the recess of the first member,
The mist generating device according to claim 1, wherein the inclined lower surface is inclined upward in the width direction from the outer circumferential surface of the convex portion of the second member. The mist generating device according to claim 1 or 2, wherein the inclined upper surface and the inclined lower surface extend parallel to each other toward the downstream side. The inclined upper surface is provided on a part of the inner peripheral surface of the recess of the first member in the circumferential direction,
The inclined lower surface is provided on a part of the outer peripheral surface of the convex portion of the second member in the circumferential direction,
The mist generating device according to claim 1, wherein the inclined upper surface and the inclined lower surface are arranged at the same position in a circumferential direction. A pair of the inclined upper surfaces are provided at positions facing each other in the circumferential direction of the inner peripheral surface of the recess of the first member,
The mist generating device according to claim 1, wherein a pair of the inclined lower surfaces are provided at positions facing each other in the circumferential direction of the outer circumferential surface of the convex portion of the second member. An inner circumferential surface extending downward from an edge of the inclined upper surface is formed inside the inner circumferential surface of the recess of the first member,
An outer circumferential surface extending upward from an edge of the inclined lower surface is formed on the outer side of the outer circumferential surface of the convex portion of the second member,
The mist generation according to claim 1, wherein the outer circumferential surface of the second member is in close contact with the inner circumferential surface of the concave portion of the first member, and the inner circumferential surface of the first member is in close contact with the outer circumferential surface of the convex portion of the second member. Device. The mist generator according to claim 6, wherein an inner circumferential surface and an inner circumferential surface of the concave portion of the first member and an outer circumferential surface and an outer circumferential surface of the convex portion of the second member extend in a vertical direction to each other. The mist generator according to claim 1, further comprising a flowing water rectifier provided near the downstream side of the spiral mist channel. The mist generating device according to claim 1, wherein a conical space is formed on the downstream side of the spiral mist flow path, and a mist outlet is provided at a lower end of the space. A shower head comprising a plurality of the mist generating devices according to claim 1. The shower head according to claim 10, wherein a plurality of the mist generators are arranged along the outer periphery of the ejection part of the shower head.

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