JPH0385165A - Air bubble generator in bathtub - Google Patents

Abstract

PURPOSE:To apply strong air bubble streams to the necessary region of the body in an easy posture by mounting the cylindrical structure connected to a water feed pipe and an air introducing pipe equipped with an opening on the downstream side of flowing water to a nozzle. CONSTITUTION:The pumps 3L, 3R driven by electromotors 2L, 2R in order to suck the hot water in a bathtub 101 to pressurize the same and the first nozzles 5L, 5R and the second nozzles 6L, 6R injecting jet streams wherein air allowed to communicate from an air opening 4A through air feed pipes 4B, 4C is mixed with the output water of the pumps to the bathtub 101 are mounted. Each of the first nozzles 5L, 5R connected to a water feed pipe 7 is equipped with a nozzle outer cylinder 51 being a cylindrical structure connected to the water feed pipe 7 at one end thereof and opened at the other end thereof and the air introducing pipe 52 having a diameter smaller than that of the nozzle outer cylinder 51 and piercing the cylindrical wall surface of the nozzle outer cylinder 51 and having an opening 52A on the downstream side of the flow of the hot water therein. Strong air bubble streams can be generated in desired directions and the apparatus can be positioned at the corner in the bathtub and, therefore, a bathing person can obtain massage effect in a free posture.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is applied to a health bath device that generates a powerful bubble flow in a relatively small bathtub for home use.

〔overview〕

The present invention provides a bubble generator for a bathtub, which is placed in a bathtub, sucks and pressurizes hot water in the bathtub with an electric pump, and mixes it with air into the bathtub from a nozzle and blows it out as a jet. By having a connected cylindrical structure and an air introduction tube with an opening on the downstream side of the flowing water, it is possible to apply a powerful bubble flow to the parts of the body that require it in a comfortable posture.

[Conventional technology]

2. Description of the Related Art A health bath device is known in which a bubble generator is placed in a household bathtub, and a bather applies a stream of bubbles generated in hot water to a desired part of the bather's body.

These devices must be easy to install and remove in the bathtub, and must have a structure that does not interfere with bathers in the bathtub.

The structure of the device is the so-called pedestal type, in which support means is attached to the bathtub in advance, and the bather attaches the pump etc. each time it is needed, and the suspension type, in which a part of the device is suspended from the edge of the bathtub. There was also a carry-in system in which the entire device was brought into the bathtub each time. For example, as a carry-in system, there is one disclosed in Japanese Utility Model Application No. 149330/1983 (Utility Application No. 84371/1983).

However, with the pedestal type, the pedestal becomes a hindrance when the device is not in use. Furthermore, in the suspension system, the pump capacity is extremely small. Furthermore, in these devices, the position where the jet is generated is extremely limited.

For this reason, the carry-in type, which allows the bubble flow to be generated at a certain degree of freedom, has come into widespread use. There are two types of this method: one in which the device floats on the surface of the hot water, and the other in which most of the device is submerged in the hot water.

[Problem to be solved by the invention]

However, with the floating type, the direction of the bubble flow generated is almost vertical, making it difficult to hit the necessary parts of the human body.

In addition, the submersible type allows the direction of the bubble flow to change, but the horizontal cross-sectional shape of the housing is larger, and in order to fix it to the inner wall of the bathtub, a suction cup is attached to the outer surface of the housing. This makes a relatively narrow household bathtub even narrower.

Furthermore, the bubble flow does not extend far beyond the nozzle, so bathers who expect a pine surge effect must be located within close range of the nozzle.

For this reason, the other effect of bathing, which is stretching the body in the bathtub and feeling relaxed, cannot be obtained.

The present invention solves these drawbacks and provides a bubble generator in a bathtub that can generate a strong bubble flow in any direction, can be easily attached to and removed from the bathtub, and can be placed in a position that does not interfere with the bather. The purpose is to provide equipment.

[Means to solve the problem]

The present invention includes an electric pump that is placed in a bathtub and sucks and pressurizes hot water in the bathtub, and a nozzle that sprays a jet of water mixed with air output from the pump into the hot water in the bathtub. In a bubble generator for a bathtub, the nozzle consists of a cylindrical structure whose one end is connected to a water pipe that guides the output water of the pump and whose other end is open, and whose diameter is smaller than that of the cylindrical structure. It is characterized by comprising an air introduction pipe that penetrates the cylindrical wall surface of the cylindrical structure and opens on the downstream side of the flowing water inside the cylindrical structure.

[Effect]

Since there are two sets of electric pumps, the generation of air bubbles inside the bathtub is powerful.

Electric pumps are elongated in the direction of their rotating shafts, so they are mounted individually in two corners of the inside of the bathtub with their rotating shafts running almost vertically, so they do not get in the way of bathers. There is no.

The nozzle penetrates the cylindrical wall surface of the cylindrical structure, creating a vortex on the downstream side of the flowing water, and this vortex sucks air at atmospheric pressure through the opening of the air introduction pipe, improving air mixing in the hot water.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a system diagram of each component of the embodiment.

This embodiment includes pumps 3L and 3R driven by electric motors 2L and 2R, respectively, to suck and pressurize hot water in a bathtub 101 through suction ports IL and IR, and a ventilation pipe connected to the output water of the pumps from an open air port 4A. A first nozzle 5 that spouts a jet mixed with air communicated via 4B and 4C into the bathtub 101.
It includes nozzles L and 5R and second nozzles 6L and 6R.

The first nozzles 5L, 5R are connected to one water outlet 32A of the pumps 3L, 3R via the water pipe 7, and the second nozzles 6L, 6R are connected to the other water outlet 32B.

Here, the features of the present invention are that the water pipe 7
Each of the first nozzles 5L and 5R connected to the water pipe 7 is a cylinder whose one end is connected to the water pipe 7 and the other end is an open end, as shown enlarged within the circular dashed line in FIG. A nozzle outer cylinder 51 which is a shaped structure, and this nozzle outer cylinder 51
The air introduction pipe 52 is provided with an opening 52A that penetrates the cylindrical wall surface of the nozzle outer cylinder 51 and has an opening 52A on the downstream side of the flow of hot water inside the nozzle outer cylinder 51.

Furthermore, a throttle 5 is provided at the connection part of the nozzle outer cylinder 51 with the water pipe 7.
1A is provided, and the water pipe 7 connects two nozzles 5L in series, and the pulsation that occurs when the pump 3L pressurizes hot water is detected between the nozzle furthest from the pump 3L and the tip of the water pipe. It is provided with a blind pipe portion 75 which is a space for absorbing water.

With this structure, the air in the opening 52A mixes well with the hot water, and the jet of hot water from the open end of the nozzle outer cylinder 51 is not weakened. In addition, hot water flows smoothly from the water pipe into the nozzle outer cylinder, so even if the water pipe is made long and a plurality of nozzles are connected in series, the jetting from each nozzle is almost uniform. Furthermore, since the pulsation of the pump does not affect the hot water flowing through the nozzle outer cylinder, the characteristics of the pump can be selected from a wider range than the conventional selection range depending on the jetting state of the nozzle.

Next, each component of this embodiment will be explained together with its operation with reference to the drawings.

FIG. 3 is an external view of the pump 3L mounted in the left casing 8L of FIG. Motor 2L connected to internal cord wire 21L wired inside the case from a power switch (not shown)
The outer cylinder 31 of the pump 3L is attached to the lower part of the pump 3L with a screw 31A. The outer cylinder 31 is provided with a water outlet 32A for delivering hot water to the first nozzle and a water outlet 32B for delivering hot water to the second nozzle. A switching handle 10L is attached to the lower part of the pump 3L, and by rotating the switching handle 10L on a horizontal plane, the pressurized hot water of the pump is switched to be delivered from either the water outlet 32A or 32B.

FIG. 4 is an exploded view of this pump section. In this figure, a circular opening 31B is provided in the center of the rotation of the rotation shaft 13A of the outer cylinder 31, and serves as a passageway for hot water drawn in from an inlet (not shown). A key portion 13D of a hole for mounting the impeller 13B is fitted into the notch 13C of the rotating shaft 13A of the upper electric motor 2L, and the impeller 13B is fixed to the rotating shaft 13A with a screw 13E. The hot water sucked in through the opening 31B by the rotation of the impeller 13B is transferred to the water outlet 3.
It is about to be pumped towards 2A or 32B. A rotary valve 34 whose outer periphery is in sliding contact with the inner circumferential surface of the outer cylinder 31 is inserted between the impeller 13B and the inner circumferential surface of the outer cylinder 31. The lower surface of this rotary valve 34 has two protrusions 34A that protrude downward.
This protrusion 34A passes through an arc-shaped elongated hole 35 provided on the bottom surface of the outer cylinder and projects downward from the outer cylinder, into which the switching handle is inserted. Further, valve holes 37A and 37B are provided in a portion of the rotary valve 34 that slides into contact with the outer cylinder 31.

As described above, the rotary valve 34 is rotated coaxially with the rotation shaft 13A by the switching handle 10L. By appropriately selecting the shapes and positions of the valve holes 37A and 37B, a switching operation can be performed so that the above-mentioned sucked hot water is sent out to either the water outlet 32A or 32B.

FIG. 5 is a schematic cross-sectional view of the pump section. This figure shows a state in which hot water is delivered to the water outlet 32A.

As shown in this figure, there is a gap 38 between the impeller and the inner surface of the rotary valve, and this gap 38 communicates with a cavity 39 in the lower part of the electric motor 2L. Therefore, out of the hot water sucked in as shown by arrow A, the water outlet 32B is closed as shown by arrow B.
For those heading in the direction of water outlet 3, as shown by arrows C and D.
Flows to 2A.

The flow path area of the water outlet 32A or 32B is the same as that of the opening 33 described above.
Since the area of the flow path is smaller than that of A and 31B, the hot water is temporarily condensed in the free space 38 and the empty space 39, and the static pressure is increased and the velocity is increased at the water outlet 3.
2A or 32B. However, unless the flow resistance loss when entering the water outlet 32A or 32B is reduced, the condensation effect described above cannot be fully utilized. Therefore, with respect to an impeller that rotates around a vertical axis, the water outlets 32A and 32B are arranged so that their axes lie on a horizontal plane and are in the tangential direction of a circumference slightly larger than the outer circumference of the impeller. In this embodiment, the number of water outlets provided in the outer cylinder 31 of the pump is two, but
This can be up to three. However, if more water outlets are provided, the condensation effect will be significantly reduced.

Here, since the rotation directions of the impellers of the pumps 3L and 3R are opposite to each other, the forces acting on the casings 8L and 8R due to the impulse at the time of starting the pumps cancel each other out. Therefore, the device does not move at startup.

In this embodiment, the water outlet 32B and the nozzle 6 connected thereto are
L (see Figure 2) is short, and if the nozzle 6L has a means for changing the jetting direction, if it is difficult to install the opening of the ventilation pipe near the nozzle, the broken line in Figure 5 As shown, it can be provided at the water outlet 32B.

In this embodiment, since the pump is placed in the corner of a rectangular bathtub, the effective angle of the outer periphery of the outer cylinder of the pump in the horizontal plane is approximately 90°, so as mentioned above, the opening direction of the water outlet is Limited to two directions.

FIG. 6 is a connection configuration diagram showing the configuration of the connection portion between the two casings 8L and 8R shown in FIG. 1. Moreover, FIG. 7 is a schematic longitudinal sectional view of this part.

The connecting beam 9 is provided with a code hole 9A through which the internal code wire 21R of the electric motor 2R passes, and spring insertion holes 9L and 9R with a partition 9B provided in the center.

Further, the arm portions 18L and 18R are provided with a hollow portion 18A that slides into contact with both ends of the connecting beam 9 on their inner surfaces, and a spring guide 19 is provided on the vertical surface 18B at the back of the hollow portion 18A.
A protrudes horizontally. The two springs 19, which are respectively inserted into the spring guides 19A, have partitions 9 at both ends.
B and the vertical surface 18B are simultaneously pressed in the horizontal direction. The spring 19 is selected to be strong enough to be easily compressed by human power, and whose pressing force changes little even if it is expanded or contracted a lot.

As shown in FIGS. 1 and 6, abutment seats 8 are attached to symmetrical sides of the arm portions 18L and 18R of the casings 8L and 8R, respectively.
A is provided, and due to the pressing force of the spring 19, this abutment seat 8A is pressed against the inner wall near the corners 101A and 101B of the bathtub. In addition, as shown in Fig. 1 and Fig. 2, the inlets IL and IR for inhaling hot water are connected to the housings 8L and 8.
Since it is provided above the bottom surface of each of the housings, the bottom surface of the housing can come into contact with the bottom surface of the bathtub.

A plan view of this embodiment installed in a bathtub 101 is shown in FIG. As shown in this figure, the casings 8'L and 8R are disposed close to the two corners 101A and 101B in the bathtub, so that they do not interfere with bathers.

As shown in the figure, the first nozzles 5L and 5R are connected to a bathtub 101.
The second nozzles 6L and 6R eject a bubble flow from the short sides of the bathtub 101 toward the center.

The ejection from these nozzles is switched by the aforementioned switching handle. The rotation directions of the rotation shafts of the pumps mounted in the casings 8L and 8R are opposite. The nozzles 5L and 5R are pressed against the inside of the bathtub by rotating the nozzles 5L and 5R in such a way that the nozzles move backward due to the reactions of the nozzles 5L and 5R when they eject. Therefore, as shown in FIG. 2, the nozzle housing 15L that covers the nozzle 5L and the tip of the water pipe 7 and the nozzle housing 15R that covers the nozzle 5R and the tip of the water pipe 7 can be made lightweight. can.

When the nozzles 5L and 5R eject at the same time, the bubble flow sufficiently reaches the center of the bathtub, allowing the bather to enjoy an effective pine surge in a free posture.

Since the spring (not shown) mounted on the connecting beam 9 is easily compressed, it is easy to attach and detach the bathtub of this embodiment, and even if the inside dimensions of the bathtub are different, the expansion and contraction range of this spring is large. Therefore, the device can be stably held in the bathtub.

Further, as shown in FIG. 6, the left and right end surfaces of the connecting beam 9 have outwardly projecting flange shapes, and the arm portions 18L,
The periphery of the opening of each hollow portion of 18R has a flange shape that projects inward.

Therefore, the connecting beam 9 will not come out and the casings 8L and 8R will not be separated.

FIG. 9 is a plan view showing the state of connection between the pump and the nozzle. In the figure, the pump 3L is shown overlapping the electric motor 2L. The first nozzle 5L is connected to a water pipe 7 attached to one water outlet 32A of the pump via a spiral pipe 71. The water pipe 7 includes a spherical part 72, and its cross section is circular when viewed from A-A in the figure, but when viewed from B-B, it is a vertical oval-shaped oval with a longer cross-sectional length in the vertical direction than in the horizontal direction. .

Two first nozzles 5L are connected to a portion having such a cross-sectional shape so as to have a structure shown in the view CC. A ventilation pipe 4B made of a flexible material is connected to each of the first nozzles 5L.

The spherical shell seat 6■ of the second nozzle 6L is connected to the other water outlet 32B of the pump 3L via a flexible hose 74. As shown in the DD view, the second nozzle 6L includes the spherical shell seat 61, a flexible tube 62 whose one end is rotatably connected to the spherical shell seat 61, and the flexible tube 62. A jet guide 6 rotatably inscribed in the spherical portion at the other end of the tube 62
It consists of 3.

FIG. 10 is a diagram of a nozzle housing in which the first nozzle 5L, water pipe 7, and ventilation pipe 4B are mounted. As shown in FIG. 1, these are housed in a nozzle housing 15L having a arm-like structure, and this nozzle housing 15L is connected via a bellows 15S to a horizontal protrusion 18H of a housing 8L in which the pump 3L is mounted. Ru. The spiral pipe 71 is accommodated in the horizontal protrusion 1gH, and the spherical part 72 of the water pipe 7 passes through the end surface 18E of the horizontal protrusion @18H, but the spherical part presser 73 is inserted from the outside thereof.
It is held so that it can rotate. The vent pipe 4B passes through the end surface 18E through a hole 18P having a diameter larger than its outer diameter.

As shown in FIGS. 1 and 8, this arm-shaped nozzle housing 15L is arranged along the longitudinal wall surface of the bathtub 101 so as to be in contact with it at its sliding surface 15F. When the bather moves the tip of the nozzle housing 15L upward or downward, the nozzle housing 15L bends from the bellows 15S,
The sliding surface allows displacement along the wall surface.

FIG. 11 is an explanatory diagram of the bending of the nozzle housing. This figure (a)
is a cross-sectional view of the bellows 153 in a horizontal state. In this figure, for ease of explanation, the connection structure between the bellows 15S and the horizontal protrusion 18H of the housing is a well-known structure, so it is omitted. This figure (b) shows the state in which the nozzle housing (not shown) has been moved upward, and the right end of the water pipe 7 has been moved downward and its relative height with the output port 32A changes. The difference is absorbed by the deformation of the spiral tube 71. Since the ventilation pipe 4B is flexible, there is no problem.

In this way, the water pipe 7 bends in the vertical direction around its spherical part 72, but in this embodiment, the maximum bending angle is about 30° in the vertical direction, and the two first nozzles and the spherical part The distances from the parts are 150 mm and 400 mm.

Therefore, due to this bending, the height positions of the two nozzles are changed in the vertical direction by about 75 mm and 200 mm, respectively, so that a horizontal bubble flow can be applied to a desired part of the bather's body.

In this embodiment, as shown in FIGS. 9 and 12, the cross section of the water pipe is a vertically elongated oval whose vertical cross-sectional length is larger than the horizontal cross-sectional length.

Generally, in a cross section of a beam-shaped member perpendicular to its axis, if the two orthogonal axes in this cross section have different axial lengths, the load-bearing strength applied in the long axis direction is the load-bearing strength applied in the short axis direction. bigger.

Therefore, in this embodiment, the water pipe has a strong resistance against forces acting in the vertical direction. Further, since the nozzle housing also has a small horizontal dimension, the protrusion of the nozzle housing from the wall surface of the bathtub is small. Therefore, the nozzle housing is less likely to interfere with the bather's posture. Further, in this embodiment, the oval shape may be an oval shape, or in the present invention, it may be an oval shape, or it may be a barrel shape in which a barrel is turned sideways.

Furthermore, a member with a rectangular draw-out bottom shape can be used for the outer shape with rounded corners on the inner surface.

FIG. 12 is a cutaway perspective view of the first nozzle 5L.

In the CC view cross section of this figure and FIG. A throttle 51A is provided at the one end of the nozzle outer cylinder 51 on the artificial side of the water pipe 7, and an opening 52A is provided on the downstream side of the flowing water inside the nozzle outer cylinder 51 through the cylindrical wall surface of the nozzle outer cylinder 51. An air introduction pipe 52 having a diameter smaller than the inner diameter of the nozzle outer cylinder 51 is provided.

Pressurized hot water is sent to the water pipe 7 by a pump (not shown), and flows into the nozzle outer cylinder 51 through the throttle 51A. Generally, when a fluid flows through a continuous conduit, the fluid exerts pressure on the inner surface of the conduit. If the velocity of the fluid is constant, this pressure will remain constant, or if the velocity increases by some means, this pressure will decrease. That is, at the connection between the water pipe 7 and the nozzle 5L, the speed of the hot water behind the throttle 51A is higher than the speed in front of the throttle 51A. Therefore, the pressure on the inner wall surface of the nozzle outer cylinder 51 is smaller than the pressure on the inner wall surface of the water supply channel 7 near the throttle 51A. Due to this pressure reduction effect, the hot water in the water pipe 7 easily flows into the nozzle outer cylinder 51.

In this embodiment, one water pipe 7 is provided with two nozzles 5L each having a different distance from the water outlet of the pump, but the fluid flowing through the water pipe 7 has a higher viscosity than the air flowing through the ventilation pipe 4B. Since the hot water is large, it is expected that the amount of hot water flowing into each of these two nozzles will pulsate at every moment due to the wave motion of the impeller. Therefore, as shown in FIG. 9, a blind pipe portion 75 for condensing hot water is provided at the tip of the water pipe 7 to temporally balance the amounts of hot water flowing into the two nozzles. Next, a cylindrical air introduction pipe 52 is inserted into the hot water flowing into the nozzle outer cylinder 5■ in the direction of the flow path. Therefore, a so-called Karman vortex is generated downstream of this cylindrical air introduction pipe.

These bubbles generate negative pressure on the downstream surface of the air introduction pipe.

Since the opening 52A is provided in this part, the ventilation pipe 4B
Even if the air is at atmospheric pressure, it is taken into the hot water, becomes bubbles, and is ejected from the open end of the nozzle outer cylinder 51 into the bathtub. This intake of air from the air introduction pipe 52 occurs because hot water flows through the nozzle.

Therefore, as described above, when hot water is not sent to the nozzle 5L by the switching handle, no air is taken in from the air introduction pipe 52. That is, as shown in FIG. 2, there is no need for air switching means between the ventilation pipe 4B led to the first nozzle and the ventilation pipe 4C led to the second nozzle.

FIG. 13 is a cutaway perspective view of the second nozzle 6L.

In the DD view cross section of this figure and FIG. 9, the spherical shell seat 61 of the second nozzle 6L is connected to the water outlet 32B of the pump 3L via the flexible hose 74 as described above. Furthermore, as shown in FIG. 13, it is fixed to the housing 8L with eight cap screws. Spherical inner surface 6 of spherical shell seat 61
1A includes a spherical joint 6 provided at one end of the flexible tube 62.
The outer surface of the spherical joint 62A is in sliding contact with the outer surface of the spherical joint 62A, and a portion of the spherical joint 62A is rotatably held by the cap screw 8I.

An opening 62C is opened in the spherical shell 62B at the other end of the flexible tube 62 in a direction substantially perpendicular to the tube axis of the flexible tube 62, and the axis of the ejected jet stream is formed in a solid angle with the axis of the opening 62C as the center. A jet guide 63 is provided which can make the flow variable.

In this manner, in the second nozzle 6L, the height of the jet within the bathtub can be adjusted by changing the angle of the flexible tube 62, and the direction of the jet can be changed by further adjusting the jet guide 63. Since the second nozzle 6L is arranged on the short side of the bathtub, the bather can apply the jet stream to desired areas such as the back and waist of the bather. It is preferable to make the length of the flexible tube 62 as large as possible. Therefore, the air introduction pipe 52 that takes air into the jet flow is connected to the water outlet 32 of the pump 3L.
It is provided in B. The flexible hose 74 facilitates assembly of the water outlet 32B and the spherical shell seat 61. The above explanation was about the first nozzle 5L and second nozzle 6L mounted on the housing 8L and related matters, but the first nozzle 5R and the second nozzle mounted on the housing 8R The same applies to 6R and related matters.

〔Effect of the invention〕

As explained above, according to the present invention, a strong bubble flow can be generated in a desired direction, and since the device can be placed in a corner of the bathtub, it will not interfere with bathers. Bathers can enjoy the pine surge effect in a free position, and it is also very effective in relieving stress and recovering from physical fatigue.

4,

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention. FIG. 2 is a component system diagram of the same embodiment. FIG. 3 is an external view of the pump section. FIG. 4 is a partially exploded view of the pump. FIG. 5 is a schematic sectional view of the pump. FIG. 6 is a configuration diagram of the connecting portion. FIG. 7 is a schematic vertical sectional view of the connecting portion. Figure 8 is an installation diagram inside the bathtub. FIG. 9 is a connection diagram between a pump and a nozzle. Figure 1Q is a diagram of the nozzle housing. FIG. 11 is an explanatory diagram of bending of the nozzle housing. FIG. 12 is a first nozzle diagram. FIG. 13 is a second nozzle diagram. LL, IR...Intake port, 2L, 2R...Electric motor, 3
L, 3R...pump, 4A...opening port, 4B, 4C
...Vent pipe, 5L, 5R...First nozzle 6L,
6R...Second nozzle, 7...Water pipe, 8A...
Case seat, 8I... Cap screw, 8L, 8R...
...Housing, 9...Connection beam, 9A...Code hole, 9B
...Partition, 9L, 9R...Spring insertion hole, IOL
, IOR...Switching handle, 13A... Rotating shaft, 13B
... Impeller, 13C... Notch, 13D...
Key part, 13E, 31A...Screw, 15F...Sliding surface of nozzle housing, 15L, 15R...Nozzle housing, 1
5S... Bellows, I8A... Hollow part of arm, II
IIB... Vertical surface of hollow part, 18E... End face of horizontal protrusion, 18M... Horizontal protrusion of housing, 18L, 18
R... Arm part of the housing, 18P... Hole in end face 18E, 19... Spring, 19A... Spring guide, 20...
Power switch, 21L, 21R...internal cord wire, 3
1...Pump outer cylinder, 31B, 52A, 62C,...
Opening, 32A132B... Water outlet, 34... Rotary valve for switching, 34A... Protrusion, 35... Arc-shaped long hole, 37A, 37B... Valve hole, 38... Play space ,
39...Vacancy, 51...Nozzle outer cylinder, 51A...
Aperture, 52... Air introduction pipe, 61... Spherical shell seat, 6
1A... Spherical inner surface, 62... Flexible tube, 62A...
・Spherical joint part of flexible tube, 52B... Spherical shell, 63...
Gout guide, 71... Spiral pipe, 72... Spherical part, 73... Spherical part presser, 74... Flexible hose, 75... Blind pipe part, 101... Bathtub, 101
A, 101B... corner of the bathtub.

Claims (1)

[Claims] 1. An electric pump that is placed in a bathtub and sucks and pressurizes the hot water in the bathtub, and a jet of water mixed with the output water of this pump and jetted into the hot water in the bathtub. A bubble generator for a bathtub, the nozzle comprising: a cylindrical structure whose one end is connected to a water pipe that guides the output water of the pump and whose other end is open; and the cylindrical structure. An air bubble in a bathtub characterized by having an air introduction pipe having a diameter smaller than the diameter of the tubular structure, and an air introduction pipe that penetrates the cylindrical wall surface of the cylindrical structure and opens on the downstream side of the flowing water inside the cylindrical structure. Generator.