JPH11332932A - Nozzle device for jet bath - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a nozzle device for a jet bath for simplifying and facilitating execution and uniformly mixing air in bath hot water. SOLUTION: This nozzle device 10 for the jet bath is provided with a nozzle main body 110, a nozzle piece 120 disposed inside the nozzle main body 110, respectively communicating with the flow-in part 111 and air flow-in part 113 of the nozzle main body 110 and provided with a jetting port 122 for jetting the bath hot water flowing into the flow-in part 111 for jetting it as a bubble stream together with the air flowing into the air flow-in part 113, a tightening flange 130 for holding the nozzle main body 110 to a bathtub main body, a nozzle ball 150 for jetting the bubble stream jetted by the nozzle piece 120 into the bathtub main body, a cover 170 provided with an opening 173 capable of projecting and arranging only the cylinder part 151 of the nozzle ball 150 on a center part and a nozzle seat 140 for holding the nozzle ball 150 inside the cover 170.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jet bath which circulates hot water in a bath tub to eject a bubble flow into the bath tub, and more particularly to a nozzle device for blowing a bubble flow into the bath tub.

[0002]

2. Description of the Related Art In a conventional jet bath, bath water in a bathtub body is sucked by a circulation pump from a suction port provided in the bathtub body, and bathwater discharged from the circulation pump is externally circulated through an external circulation path. The circulated bath water is guided to a nozzle device provided in the bathtub body together with air in the air taken in from the air (air) intake port, and is jetted into the bathtub body as a bubble flow, and is widely used.

FIG. 4 shows a nozzle device of this type for a jet bath (FIG. 4 (a) is a sectional view of the nozzle device, and FIG. 4 (b) is a right side view of FIG. 4 (a). A nozzle device including a nozzle body 20, a cylindrical holder 25, a nozzle ball 26, and a cover 27 as shown in Japanese Patent Application No. 8-346341 has been proposed. The nozzle body 20 includes a first connection portion 21 that connects an external pipe for supplying hot water to the nozzle body 20, a second connection portion 22 that connects an intake pipe to the nozzle body 20, and an external device for supplying hot water. It is composed of an ejection part 23 having a through-hole 23a for ejecting bath water flowing from the pipe, and a communication chamber 24 for communicating the first connection part 21 and the second connection part 22.

The first connection part 21 and the through hole 23 of the ejection part 23
and the hot water flowing into the first connecting portion is filled with the through-hole 23a.
A communication hole 21a is formed so as to flow into the communication chamber 24, and an inner surface of the through hole 23a forms a tapered surface 23b for ejecting bath water into the communication chamber 24. A communication hole 22a is formed between the second connection part 22 and the communication chamber 24. The cylindrical holder 25 has a flange portion 25b formed at an upper portion thereof for holding the nozzle body 20 in an opening provided in the bathtub body. An opening 25 a for communicating with the communication chamber 24 of the nozzle body 20 is formed at the bottom of the cylindrical holder 25.

[0005] The nozzle ball 26 is rotatably disposed in the cylindrical holder 25 in order to eject the bath water flowing into the communication chamber 24 into a nozzle shape and to vary the angle of the ejection. It comprises a spherical bottom 26a and a cylindrical body 26b having a hole 26c which is open in a tapered shape outward from the hollow, substantially spherical bottom 26a. The cover 27 is provided to hold the nozzle ball 26 in the cylindrical holder 25 so as to be continuously rotatable in the vertical and horizontal directions by 90 degrees, and is provided with a flange portion 27a at an upper portion thereof. An annular nozzle ball seat 28 having a circular cross section for rotatably holding the nozzle ball 26 in the cylindrical holder 25 is provided at a corner of the cylindrical body portion 27b.

[0006]

In the nozzle device described above, the nozzle body 20 is arranged on the outer surface of the opening of the bathtub body, the cylindrical holder 25 is arranged on the inner surface of the opening, and these are screwed together. The nozzle body 20 and the cylindrical holder 25 are assembled on both sides of the opening. Thereafter, the nozzle ball 26 is disposed in the cylindrical holder 25, and the cover 27 in which the nozzle ball seat 28 is disposed at the corner of the cylindrical body portion 27b is inserted into the cylindrical holder 25 and screwed into the nozzle. Body 20
Is to be assembled.

However, after assembling the cylindrical holder 25 to the nozzle body 20, the nozzle ball 26 is disposed in the cylindrical holder 25, and the cover 27 in which the nozzle ball seat 28 is disposed at the corner of the cylindrical body portion 27b. Cylindrical holder 2
Since the work of inserting and screwing into the nozzle 5 is an on-site work, the installation work of this kind of nozzle device is complicated and troublesome, and its workability and workability are extremely deteriorated, so that it is difficult to construct. There was a problem that time was required.

In the above-described nozzle device, the communication chamber 2 for communicating the first connecting portion 21 and the second connecting portion 22 is provided.
Bath water is spouted into the bath 4, and the air in the outside air is sucked in from the second connection portion 22 connected to the intake pipe with the spout of the bath water, so that the air is mixed into the bath water. However, since the second connection portion 22 and the communication chamber 24 communicate with each other through one hole, there has been a problem that air is not uniformly mixed into the bath water.

[0009]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and is simple and easy to carry out, and air is uniformly mixed in bath water. An object of the present invention is to provide a jet bath nozzle device.

[0010] Therefore, the jet bath nozzle device of the present invention is provided with an inflow portion connected to an external pipe, an air inflow portion connected to an intake pipe, and an outflow portion in contact with the vicinity of the discharge opening of the bathtub body. Nozzle body, and an outlet provided in the nozzle body, which communicates with the inflow portion and the air inflow portion of the nozzle body, respectively, and which jets out the hot water flowing into the inflow portion. A nozzle piece that is jetted out as a bubble flow with air, a fastening flange that is screwed into the outflow portion of the nozzle body to hold the nozzle body in the bathtub body, a cylindrical portion, and a substantially spherical bulging outward from the cylindrical portion. A nozzle ball that has a bulging portion that bulges out from the nozzle piece and blows out the bubble flow into the bathtub body, and an opening that allows only the cylindrical portion of the nozzle ball to protrude and be disposed. A cover having a threaded portion which is screwed to the fastening flange on its outer periphery with provided, so that and a nozzle seat for holding the nozzle ball cover.

When the nozzle device has such a structure, the nozzle ball can be held in the cover simply by attaching the nozzle seat to the cover after disposing the nozzle ball on the cover. Therefore, the nozzle ball is held in the cover in advance, the nozzle body is arranged on the outer surface of the discharge opening of the bathtub body, the fastening flange is arranged on the inner surface of the discharge opening, and these are screwed together. As a result, the nozzle body and the fastening flange are assembled on both sides of the discharge opening. Thereafter, the cover holding the nozzle ball is screwed onto the tightening flange to complete the assembly of the nozzle device. For this reason, installation work of this kind of nozzle device becomes simple and easy, its workability and workability are improved, and work can be performed in a short time.

A plurality of communication holes are provided in the peripheral wall of the nozzle piece to communicate with the air inflow portion of the nozzle body, and when the bath water flowing into the inflow portion of the nozzle body is blown out from the outlet of the nozzle piece, the air is sucked. When air is sucked from a plurality of communication holes in the surrounding wall communicating with the outside air through a pipe and is ejected as a bubble flow, the air is mixed more uniformly around the bath water ejected from the ejection port of the nozzle piece. You will be able to enjoy a comfortable bath.

Further, when a plurality of locking grooves are provided at the tip of the threaded portion of the cover, and a plurality of standing claws are provided around the nozzle seat and projecting from the nozzle seat, the standing claw is engaged with the cover. Since it is possible to hold the nozzle ball on the cover only by locking the groove, the assembling of this type of nozzle device is further facilitated, and its workability and workability are further improved. The construction of the jet bath can be performed in a shorter time.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the jet bath nozzle device of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of the nozzle device of the present invention, FIG. 2 is a cross-sectional view showing a state where the nozzle device of FIG. 1 is assembled, and FIG. 3 is a jet bath using the nozzle device of the present invention. It is a perspective view which shows schematic structure of a (bubble generation bathtub apparatus).
The nozzle device 100 of the present invention includes a nozzle body 110, a nozzle piece 120, a fastening flange 130, a nozzle ball seat 140, a nozzle ball 150, an O-ring 160, and a cover 170.

The nozzle body 110 is connected to the external pipe 15 (FIG. 3).
) And the nozzle piece 12
Nozzle nozzle holding portion 112 for holding the pressure
Air inlet 1 connected to 7 or 18 (see FIG. 3)
13 and the discharge openings 11a, 11b, 1 of the bathtub body 10.
Outflow portion 114 in contact with the vicinity of 2a (not shown) and 12b
And The inner surface of the inflow portion 111 has a tapered surface 11 so as to have a narrow width toward the nozzle piece holding portion 112.
5 are formed. Further, a thread portion 111 a is formed on the outer surface of the inflow portion 111, and an elbow 110 a connected to the external pipe 15 is screwed, so that the inflow portion 111 communicates with the external pipe 15.

The inner surface of the nozzle piece holding portion 112 has a tapered surface 112b so as to become wider toward the outflow portion 114.
Are formed. A thread groove 112a is formed at the tip of the nozzle piece holding portion 112. When the thread 121c formed at the tip of the nozzle piece 120 is screwed, the nozzle piece 120 is inserted into the nozzle body 110.
Will be provided. A step 113a is formed inside the air inflow section 113, and an air hole 11 communicating with the inside of the nozzle piece holding section 112 is provided below the step 113a.
3b is formed. Then, an intake pipe 17 or 18 (see FIG. 3) described later is fitted into the step portion 113a.

At the end of the outflow portion 114, a flange portion 116 is provided.
The outer surface of the flange portion 116 is provided with the discharge openings 11a, 11b, 12
a (not shown) and 12b. A screw groove portion 114a is formed on the inner surface of the outflow portion 114, and a screw thread portion 131a formed on the fastening flange 130 is screwed into the screw groove portion 114a, so that the nozzle device 100 is attached to the bathtub body 10. It will be fixed.

An external pipe 1 is provided inside the nozzle piece 120.
A spout 121 for spouting bath water sent from 5;
There is provided a mixing section 122 for sucking and mixing air in the outside air through the suction pipe 17 or 18 by the bath water spouted from the spout section 121. An ejection port 121a is provided at the ejection-side tip of the ejection port 121, and a tapered surface 121b is formed on the inner surface of the ejection port 121 so as to be narrower from the attachment-side tip toward the ejection port 121a. In addition, the tip of the ejection port 121 a is formed so as to protrude into the mixing section 122.

On the other hand, a thread portion 121c is formed on the outer surface of the jet port portion 121. The thread portion 121c is screwed into a thread groove 112a of the nozzle piece holding portion 112, so that the inside of the nozzle body 110 is formed. Nozzle piece 12
0 will be provided. In addition, at both ends of the outer surface of the mixing portion 122, the convex portions 12 each having a tapered surface are formed.
2a and 122b are formed.
A plurality (for example, four at 90 ° intervals) communicating with the air holes 113b provided in the air inflow portion 113 is provided between the air inlets 122b.
An air chamber 122c is formed on the outer surface between the communication hole 123 and the projections 122a and 122b.

Thus, the thread portion 121c is screwed into the thread groove portion 112a of the nozzle piece holding portion 112, and the nozzle piece 120 is disposed in the nozzle body 110. Hot water flows into inflow section 111
Through the outlet 121a. When bath water is spouted from the spout 121a, the spout output uniformly sucks air in the outside air from the air chamber 122c communicating with the intake pipe 17 or 18 and the air inflow portion 113 through the plurality of communication holes 123 to mix. It is ejected from the part 122 as a bubble flow.

The fastening flange 130 has a through hole 131 inside.
And a flange 132 is formed at an end of the through hole 131. On the outer surface of the through hole 131, a screw thread portion 131a screwed to the screw groove portion 114a of the outflow portion 114 of the nozzle body 110 is formed, and on the inner surface, a screw groove portion 131b for screwing the cover 170 is formed. Is formed. Then, the thread portion 131 a formed on the outer surface of the through hole 131 is inserted into the thread groove portion 114 of the outflow portion 114.
By screwing to the nozzle a, the nozzle main body 110 is held in each of the discharge openings 11a, 11b, 12a (not shown), and 12b of the bathtub main body 10.

The nozzle ball seat 140 includes a circular seat plate 142 having an opening 141 and a plurality of (for example, three) standing claws 143 rising from the seat plate 142, and the periphery of the opening 141 of the seat plate 142 is a nozzle ball. 150 bulges 152
Is provided with a tapered surface 141a that matches the curved surface. By providing the tapered surface 141a around the opening 141, the nozzle ball 150 can rotate smoothly. A locking portion 143a is provided at the tip of the standing claw 143, and by locking the locking portion 143a in a locking groove 174 provided in the cover 170, the nozzle ball 150 is attached to the cover 170. Will be retained.

The nozzle ball 150 includes a cylindrical portion 151 and a bulging portion 152 which bulges substantially spherically from the cylindrical portion 151, and a jetting through hole penetrating through the cylindrical portion 151 and the bulging portion 152. 153 are formed. The inner surface of the cylindrical portion 151 has a tapered surface 1 that is wider from the axial center of the bulging portion 152 toward the tip of the cylindrical portion 151.
51a are formed. In addition, a tapered surface 152a is formed so that the inner surface of the bulging portion 152 becomes wider from the axial center of the bulging portion 152 toward the tip of the bulging portion 152.

The cover 170 comprises a flange portion 171 and a cylindrical portion 172, and an opening 173 is formed at the center of the cylindrical portion 172.
And a stepped portion 172a is formed inside the cylindrical portion 172, and the O-ring 160 is disposed in the stepped portion 172a. A thread 172b is formed on the outer surface of the cylindrical portion 172, and the thread 172b is fastened to the fastening flange 1
The cover 170 is fixed to the fastening flange 130 by being screwed into the thread groove 131b formed in the cover 30.

A plurality of (for example, three) locking grooves 174 are provided at the distal end of the outer surface of the cylindrical portion 172 to lock a standing claw 143 provided on a nozzle ball seat 140 described later. A concave portion 175 is formed in the flange portion 171, and the cylindrical portion 151 of the nozzle ball 150 is disposed in the concave portion 175 in a protruding manner.
5 has a tapered surface 175a formed on the outer surface. As described above, the nozzle ball 150 is provided with the bulging portion 152 bulging substantially spherically from the cylindrical portion 151, and the cover 1
The tapered surface 17 is formed on the concave portion 175 of the flange portion 171 of FIG.
By providing the nozzle ball 5a, when the nozzle ball 150 is assembled into the cover 170 by the nozzle ball seat 140, the nozzle ball 150 can freely rotate up, down, left, and right.

A description will be given of a case where the nozzle device 100 thus configured is assembled to the bathtub body 10. First, after arranging the O-ring 160 on the step portion 172a of the cover 170, with the cylindrical portion 151 of the nozzle ball 150 protruding into the concave portion 175 of the cover 170, the locking portion of the standing claw 143 of the nozzle ball seat 140 is held. Cover 143a 17
The nozzle ball 150 is held in the cover 170 by being locked in the locking groove 174 of the No. 0 to form a cover assembly 180. On the other hand, the nozzle piece holding portion 11 of the nozzle body 110
The screw part 121c of the nozzle piece 120 is screwed into the screw groove part 112a at the tip end of the nozzle piece 120, and the nozzle piece 120 is disposed in the nozzle body 110. As a result, the nozzle device 100 becomes three parts: the nozzle body 110 in which the nozzle piece 120 is disposed, the fastening flange 130, and the cover assembly 180.

These three parts are transported together with other parts other than the nozzle device 100 to a site where a jet bath is constructed, and the discharge openings 11 a and 11
b, 12a (not shown) and 12b, rubber packings 190 are arranged on both sides, and the ejection openings 11a and 1
Rubber packing 190 is provided on the outer surfaces of 1b, 12a and 12b.
The nozzle body 110 is arranged through the
A tightening flange 130 is disposed on the inner surfaces of a, 11b, 12a, and 12b via a rubber packing 190.

Next, the thread portion 1 of the tightening flange 130
31a is the thread groove portion 1 of the outflow portion 114 of the nozzle body 110.
By screwing onto the nozzle 14a, the nozzle body 110 is connected to the discharge openings 11a, 11b, 12a, 12b of the bathtub body 10.
Fixed to Then, the cover 1 of the cover assembly 180
70 is screwed into the thread groove 131b of the tightening flange 130, thereby forming the cover assembly 180.
Is fixed to the fastening flange 130. Thereby, the attachment of the nozzle device 100 to the bathtub body 10 is completed.

Next, the above-described nozzle device 10 of the present invention will be described.
A jet bath (bubble generation bathtub apparatus) using No. 0 will be described. The jet bath includes a bathtub body 10 formed in a box shape having an upper surface opening. The front wall 11 of the bathtub body 10 has back side discharge openings 11a and 11b, and the rear wall 12
Are provided with foot-side discharge openings 12a (not shown) and 12b and a suction port opening 12c, respectively. Then, as described above, the nozzle device 100 is disposed in each of the openings 11a, 11b, 12a, and 12b, and the suction port 13 is disposed in the suction port opening 12c.

The back-side discharge openings 11a and 11b are provided at a higher position than the foot-side discharge openings 12a and 12b so that the bubble jet can be reliably applied to predetermined portions of the back and the foot of the bather, respectively. I can do it. Further, the suction port opening 12c is provided at a lower position than the foot-side discharge openings 12a and 12b, so that the bath water can be reliably sucked.

A circulating pump unit 14 comprising a circulating pump for circulating bath water and a pump driving motor for driving the circulating pump is provided on the outer peripheral edge of the bathtub body 10. The water suction port 14 a of the circulation pump unit 14 is connected to the suction port 13. Further, the water outlet 14 b of the circulation pump unit 14 is connected to an elbow 110 a connected to each nozzle device 100 via an external pipe 15. The external pipe 15 is formed of a polybutene resin, and a T-shaped joint or an L-shaped joint is provided at a necessary portion.

Further, a pressure switch 16 is provided in the external pipe 15 near the water discharge port 14b so that the water pressure discharged from the water discharge port 14b is a predetermined pressure (for example, 0.5 to 0.6).
When the pressure falls below kgf / cm ² ), a detection signal is sent to a control device (not shown) to stop the circulation pump. Thereby, the idling of the circulation pump unit 14 can be prevented. In addition, when the suction port 13 is closed with a hand, a foot, or the like, or when the circulating pump unit 14 is overloaded by sucking a towel, hair, or the like, the operation of the circulating pump unit 14 is automatically stopped. Therefore, failure of the circulation pump unit 14 due to overload operation can be prevented.

On the other hand, an intake pipe 17 is disposed at the air inlet 113 of each nozzle device 100 disposed at the back side discharge openings 11a and 11b, and an intake valve 17a is provided at the other end of the intake pipe 17. It is arranged. An intake pipe 18 is provided at the air inlet 113 of each nozzle device 100 provided at the foot-side discharge openings 12a and 12b, and an intake valve 18a is provided at the other end of the intake pipe 18. ing. The intake valves 17a and 18a are normally closed solenoid valves that are opened by an on / off (strong) operation of an on / off (strong / weak) selector switch (not shown) disposed in the bathroom. The opening having a large diameter communicates with the outside air, and the opening having a large diameter communicates with the outside air in an open state.

Therefore, when an on / off (strong / weak) switch (not shown) provided in the bathroom is in an off (weak) state, the solenoid valve is not operated and a small amount of outside air is passed through the small-diameter opening. Of the air (air) of the intake pipe 17 or 1
When the solenoid valve is in the ON (strong) state, the solenoid valve is in the operating state, and a large amount of outside air (air) is introduced into the intake pipe 17 or 18 from the large-diameter opening.
Thus, for example, when ON (strong) is selected by an ON / OFF (strong / weak) switch, the intake valve 17
The solenoid valves a and 18a are activated, and a large amount of air (air) is introduced into the air inlet 113 of each nozzle device 100 from the large-diameter openings through the intake pipes 17 and 18. As a result, a large bubble flow is generated in the nozzle ball 150.
Squirt from the piercing through hole 153.

Next, the operation of the jet bath constructed as described above will be described. First, in a state in which a predetermined amount of bath water is stored in the bathtub body 10, when a start push button switch (not shown) is turned on, the pump drive motor of the circulating pump unit 14 is driven. , The circulation pump operates. With the operation of the circulation pump, the bath water is drawn into the circulation pump from the suction port 13 of the circulation pump unit 14 through the water suction port 14a.

The bath water sucked into the circulation pump is supplied to the external piping 15 through the water outlet 14b of the circulation pump unit 14.
Flows into. The bath water that has flowed into the external pipe 15 flows into the inflow section 111 of each nozzle device 100, and is jetted from the jet port 121 of the nozzle piece 120 toward the mixing section 122. At this time, since the inside of the mixing section 122 is in a negative pressure state, the intake valve 17a or 18
a, the intake pipe 17 or 18, the air inlet 113 of the nozzle body 110, the air hole 113b, and the plurality of communication holes 1
Air flows into the mixing section 122 through 23.

Therefore, the bath water spouted from the spout 121 of the nozzle piece 120 toward the mixing section 122 is mixed with air uniformly from the surroundings to form a bubble flow, and the bath water is spouted through the spout 153 of the nozzle ball 150. It squirts into the main body 10. At this time, the ON / OFF switch (not shown)
When ON (strong) is selected by the OFF (strong / weak) changeover switch, the solenoid valves of the intake valves 17a and 18a are activated, and a large amount of air (air) flows from the large-diameter opening into the intake pipe 17. And 18 through each nozzle device 100
Is introduced into the air inflow portion 113 of the nozzle ball 150, so that a large bubble flow is spouted vigorously from the ejection through hole 153 of the nozzle ball 150. On the other hand, when OFF (weak) is selected, the solenoid valves of the intake valves 17a and 18a are in a non-operating state, and a small amount of air (air) passes through the intake pipes 17 and 18 from the small-diameter openings and passes through each nozzle. Since the small bubble flow is introduced into the air inflow portion 113 of the device 100, the small bubble flow is ejected from the ejection through hole 153 of the nozzle ball 150.

As described above, in the nozzle device 100 of the present invention, the O-ring 160
After placing the nozzle ball 150 through the nozzle seat 1
The nozzle ball 150 can be held in the cover 170 only by locking the locking portion 143 b of the nozzle 40 into the locking groove 174 of the cover 170. For this reason, the nozzle assembly 150 is previously held in the cover 170 and the cover assembly 18 is
0, the discharge openings 11a, 11b,
The nozzle main body 110 is disposed on the outer surface of each of the discharge openings 11a, 11b, 12a, and 12b, and the fastening flange 130 is disposed on the inner surface of each of the discharge openings 11a, 11b. , 12a and 12b, the nozzle body 110 and the fastening flange 130 are assembled, and then the cover assembly 180 is screwed onto the fastening flange 130 to complete the assembly of the nozzle device 100. The installation work of the nozzle device becomes simple and easy, the workability and workability thereof are improved, and the work can be performed in a short time.

Since a plurality of communication holes 123 communicating with the air inlet 113 of the nozzle body 110 are provided in the peripheral wall of the nozzle piece 120 provided in the nozzle body 110, the inlet 111 of the nozzle body 110 is provided. When the bath water which has flowed into the nozzle piece 120 is jetted from the jet port 121a of the nozzle piece 120, the air is sucked from the plurality of communication holes 123 communicating with the outside air through the intake pipe 17 or 18 and jetted out as a bubble flow. , Nozzle 1 of nozzle piece 120
Since the air is mixed more uniformly around the bath water spouting from 21a, comfortable bathing can be enjoyed.

In the above-described embodiment, an example has been described in which the switching operation of each intake valve 17a, 18a is simultaneously performed using one on / off (strong / weak) changeover switch. The switching operation of each of the intake valves 17a and 18a may be separately performed using a (strong / weak) changeover switch. In this case, dorsal side is strong and feet side is weak, dorsal side is weak and feet side is strong, dorsal side,
It is possible to make both the feet strong and the back and feet both weak.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a nozzle device of the present invention.

FIG. 2 is a sectional view showing a state where the nozzle device of FIG. 1 is assembled.

FIG. 3 is a perspective view showing a schematic configuration of a jet bath using the nozzle device of the present invention.

FIG. 4 is a cross-sectional view showing a state where a conventional nozzle device is assembled.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Bathtub body, 13 ... Suction port, 14 ... Circulation pump unit, 15 ... External piping, 17, 18 ... Intake piping, 17
a, 18a: intake valve, 100: nozzle device, 110
... Nozzle body, 111 inflow section, 112 nozzle piece holding section, 113 air inflow section, 114 outflow section, 120
... Nozzle piece, 121 ... Squirt part, 121a ... Squirt part, 122 ... Mixing part, 123 ... Communication hole, 130 ... Tightening flange, 131 ... Through hole, 132 ... Flange part, 140
... Nozzle ball seat, 141 ... Opening, 142 ... Seat plate, 14
3: standing nail, 150: nozzle ball, 151: cylindrical part, 1
52: bulging portion, 153: through hole for ejection, 160: O-ring, 170: cover, 171: flange portion, 172: cylindrical portion, 172b: thread portion (screw portion), 173: opening,
174: locking groove

Claims (3)

[Claims] 1. A bath water disposed at a discharge opening of a bathtub body and circulated externally through an external pipe is blown out into the bathtub body as a bubble flow together with air sucked in through an intake pipe communicating with the outside air. A nozzle device for a jet bath, comprising: an inflow portion connected to the external pipe, an air inflow portion connected to the intake pipe, and an outflow portion in contact with a vicinity of the discharge opening of the bathtub body. And an ejection port disposed in the nozzle body and communicating with the inflow section and the air inflow section of the nozzle body, respectively, and having a spout for ejecting bath water flowing into the inflow section, flowing into the air inflow section. A nozzle piece that is jetted out as a bubble flow with the blown air; a fastening flange screwed into the outflow portion of the nozzle body to hold the nozzle body in the bathtub body; A swelling portion that swells out from the cylindrical portion toward the outside in a substantially spherical shape, and a nozzle ball that jets a bubble flow jetted from the nozzle piece into the bathtub body; and only the cylindrical portion of the nozzle ball. A cover provided with an opening at the center thereof so that it can be protruded and provided with a threaded portion screwed to the fastening flange on the outer periphery thereof, and a nozzle seat for holding the nozzle ball on the cover. A nozzle device for a jet bath, comprising: 2. A plurality of communication holes communicating with the air inflow portion of the nozzle body are provided in a peripheral wall of the nozzle piece, and the bath water flowing into the inflow portion of the nozzle body is provided by the jet port of the nozzle piece. 2. The jet bath according to claim 1, wherein the air is sucked from a plurality of communication holes of the peripheral wall that communicates with the outside air via the intake pipe when the air is jetted out and jetted out as a bubble flow. 3. Nozzle device. 3. A plurality of locking grooves are provided at a tip end of the threaded portion of the cover, and a plurality of standing claws are protruded around the nozzle seat from the nozzle seat. 3. The jet bath nozzle device according to claim 1, wherein a standing claw portion is locked in the locking groove of the cover to hold the nozzle ball on the cover.