JP2008237436A - Bathtub cleaning nozzle and bathtub - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve a bathtub cleaning nozzle which is provided at a point of the center part of the bottom surface of a rectangular bathtub body, and which is capable of effectively cleaning the whole inner surface of the bathtub body by equally injecting the cleaning water in a swirling flow. <P>SOLUTION: A bathtub cleaning nozzle 1 consists of a body part and a nozzle guide for swirl generation which is rotatably interfit at the inside part of this body part. An injection opening 11 has an elliptical shape, and an elliptic direction F of the ellipse is formed at a predetermined angle against a pair of water draining ditches 12 in the longitudinal direction O'. When the cleaning nozzle 1 of the bathtub 2 is fixed onto a bottom part 6 of the bathtub 2, the longitudinal direction of a pair of water draining ditches 12 is settled in the direction of a center line O which extends in the longitudinal direction of a tank part 3. By that means, the elliptic direction of the ellipse of the injection opening 11 drifts at a predetermined angle in a reverse way from the turning direction of the swirl flow against the center line O that extends in the longitudinal direction of the tank part 3, which enables the cleaning nozzle to be fixed at the bottom part 6 of the bathtub 2. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a bathtub cleaning nozzle and a bathtub, and in particular, in a cleaning nozzle having an elliptical outlet, a drain groove that is inclined in a direction opposite to the swirling flow is formed, and the direction of the drain groove is aligned with the bathtub longitudinal direction. It is related with the bathtub washing nozzle and bathtub which were positioned and attached to the bottom face, and made the whole bathtub washable uniformly.

  2. Description of the Related Art Conventionally, it is known to provide a nozzle for jetting cleaning water at the bottom of a bathtub and wash the bathtub by jetting cleaning water from the jet nozzle toward the inner surface of the bathtub. The present applicant has already proposed a bathtub cleaning nozzle and a bathtub in which a nozzle having a circular spout and formed with a draining groove is attached to the bottom of the bathtub so that the bathtub can be cleaned evenly in the cleaning bathtub (see Patent Document 1). ).

By the way, as for the liquid injection means, in the fuel injection nozzle of the internal combustion engine, there is one that suggests that the injection port is formed in an elliptical shape and the position shifted in the direction opposite to the turning direction is positioned in consideration of the injection direction. Yes (see Patent Document 2).
Japanese Patent No. 3171127 JP 2003-206929 A

  Since the bathtub washing nozzle described in Patent Document 1 jets washing water into the bathtub while generating a swirling flow, dirt (including oil and fat, keratin etc.) adhering to the inner surface of the bathtub can be washed effectively. However, since the jet nozzle is circular, the bathtub cleaning nozzle has two or three bathtub cleaning nozzles in the longitudinal direction of the bathtub in order to spray cleaning water on the entire inner surface of the rectangular bathtub body. It is necessary to provide it.

  The present invention is a bathtub that can be efficiently cleaned by spraying wash water that has been swirling on the entire inner surface of the bathtub body from the bathtub washing nozzle evenly, even if it is provided at one location in the center of the bottom of the rectangular bathtub body. An object is to realize a cleaning nozzle and a bathtub.

  In order to solve the above problems, the present invention is a bathtub cleaning nozzle comprising a main body part and a nozzle guide for generating a swirl flow fitted inside the main body part, and has an elliptical shape on the surface side of the main body part. The ejection port and the drainage groove are formed, and the longitudinal direction of the drainage groove and the ellipse direction of the ellipse of the ejection port do not coincide with each other and are deviated by a predetermined angle from the swirling direction of the swirling flow. A bathtub cleaning nozzle is provided.

  The bathtub cleaning nozzle is preferably attached to the bottom of the bathtub so that the longitudinal direction of the drain groove substantially coincides with the longitudinal direction of the bathtub.

  In order to solve the above-mentioned problems, the present invention provides a bathtub having the bathtub cleaning nozzle attached thereto, wherein one bathtub cleaning nozzle is attached at a substantially central position of the bottom of the bathtub. .

According to the bathtub cleaning nozzle and the bathtub according to the present invention, the following effects are produced.
(1) Since the jet nozzle of the bathtub washing nozzle is elliptical, even if it is installed at the center of the rectangular bathtub body, it can be injected to the inner surface on the longitudinal direction side of the bathtub body.

(2) Since the ellipse direction of the ellipse of the jet nozzle of the bathtub washing nozzle is shifted by a predetermined angle from the longitudinal direction of the bathtub body in the opposite direction from the swirling direction of the swirling flow of the washing water in the neck by the nozzle guide, The entire inner surface of the bathtub main body in the longitudinal direction (the surface of the end portion in the longest hand direction and the surface of the front side and the rear surface in the swirling direction of the cleaning water by the nozzle guide connected thereto) can be uniformly cleaned. be able to.

  The best mode for carrying out the cleaning nozzle and the bathtub according to the present invention will be described below with reference to the drawings based on the embodiments.

  Fig.1 (a) is a top view of the bathtub 2 which provided the bathtub washing nozzle 1 of a present Example, FIG.1 (b), (c) is AA sectional drawing of Fig.1 (a), respectively. It is BB sectional drawing. The tank part 3 (part which can be depressed and bathed) of this bathtub 2 is substantially rectangular in planar view as a whole, is surrounded by the peripheral part 4, and is further formed in the outer periphery so that the flange 5 projects horizontally. Yes.

  The tank portion 3 includes a flat bottom portion 6 and a stool portion 7 positioned above the bottom portion 6. A drain plug 8 is provided at the bottom 6. One bathtub cleaning nozzle 1 is provided at the bottom 6 in the longitudinal direction of the tank 3 (left-right direction in FIG. 1A) and at the approximate center in the width direction. In FIG. 1A, a large number of circles described in the bottom 6, the stool 7 and the like represent convex portions for preventing slipping.

  FIG. 2A is a diagram for explaining the bathtub cleaning nozzle 1. The bathtub cleaning nozzle 1 is for generating a swirling flow (vortex flow) that is rotatably fitted in the main body 9 and the main body 9. Nozzle guide 10. On the surface side (upper surface side) of the main body 9, an elliptical spout 11 and a pair of drain grooves 12 are formed in plan view.

  More specifically, as shown in FIGS. 3A and 3B, the main body 9 includes a cylindrical portion 13, a neck portion 14 whose diameter decreases from the cylindrical portion 13 upward, a circular opening 15, An elliptical spout 11 formed continuously in the circular opening 15 and a dish-shaped head 16 coupled to the upper portion of the neck 14 are provided. The cylindrical portion 13 has a screw 17 formed on the outer periphery thereof.

  A hexagonal fitting recess 18 for a tightening tool is formed in the head 16 so as to surround the spout 11. A pair of drain grooves 12 connected to the fitting recess 18 are formed so as to face each other in the radial direction from the center of the jet port 11. The pair of drain grooves 12 not only function as a drain so that water does not collect around the spout 11, but will be described later in detail, but when the bathtub cleaning nozzle 1 is attached to the bottom 6 of the bathtub 2. Also, it has a function as a positioning mark for making it easy to set the direction of the jet nozzle 11.

  Next, the structure of the jet nozzle 11 will be described. As already explained in the section of the subject of the present invention, when the jet nozzle of the bathtub cleaning nozzle is made circular as in the prior art, in order to clean the inner surface of the region 19 at both ends in the longitudinal direction of the bathtub 2, in the longitudinal direction, It was necessary to provide a plurality of bathtub cleaning nozzles. Therefore, the inventors of the present invention have provided the jet nozzle 11 with an elliptical shape (shown as a “comparative example” in FIG. 2B). It was found that the cleaning water can be sprayed up to the inner surface of the region 19 at both ends in the longitudinal direction 2 and this is a convenient configuration for cleaning.

  Further, details will be described in the description of the operation of the present invention. In order to clean the inner surfaces of the regions 19 at both ends in the longitudinal direction of the bathtub 2 without unevenness, the inventor 11 has an elliptical shape. In addition to the formation of the nozzle, the nozzle guide 10 causes a swirl flow in the neck portion 14 with respect to the center line O (see FIG. 1A) extending in the longitudinal direction of the bathtub 2 through the center of the jet nozzle 11. The structure which can attach the washing | cleaning nozzle 1 of the bathtub 2 so that it may have shifted | deviated the predetermined angle in the reverse direction from this turning direction was devised.

  In this way, in order to be able to easily fix the direction of the elliptical oval shape of the ejection port 11 at a predetermined angle with respect to the longitudinal direction of the tank portion 3, as shown in FIG. The ellipse ellipse 11 is formed so as to be deviated by a predetermined angle (θ °) with respect to the longitudinal direction of the pair of drain grooves 12 (direction indicated by the straight line O ′).

  With this configuration, when the cleaning nozzle 1 is screwed onto the nozzle receiver 26 and fixed to the bottom 6 of the bathtub 2, the longitudinal direction O ′ of the pair of drain grooves 12 is the longitudinal direction of the tank portion 3, more specifically. If the direction of the center line O that passes through the center of the spout 11 and extends in the longitudinal direction of the bathtub 2 is directed to the direction of the center line O, the ellipse of the ellipse of the spout 11 has a predetermined angle θ ° with respect to the longitudinal direction of the bathtub 2. It can be fixed so as to be displaced.

  In short, the feature of the present invention is that the jet nozzle 11 of the cleaning nozzle 1 has an elliptical shape in plan view, and the ellipse direction of the ellipse is a predetermined angle θ ° with respect to the longitudinal direction of the pair of drain grooves 12. It is the structure formed by. When the washing nozzle 1 of the bathtub 2 having such a configuration is fixed to the bottom 6 of the bathtub 2, the longitudinal direction O ′ of the pair of drain grooves 12 extends in the direction of the center line O extending in the longitudinal direction of the tank portion 3. If attached, the ellipse direction of the ellipse of the spout 11 is at a predetermined angle in the opposite direction from the turning direction in which the cleaning water is swirled in the neck portion 14 by the nozzle guide described later with respect to the center line extending in the longitudinal direction of the tank portion 3. The configuration is such that it can be fixed to the bottom 6 of the bathtub 2 with a shift of θ °.

  As shown in FIGS. 3C and 3D, the vortex generating nozzle guide 10 protrudes downward along the axial direction from the disk 20 and a position equidistant from the circumferential direction of the disk 20. And four leg portions 21 for insertion guides, and inclined water passages 22 for generating eddy currents are formed at four positions at equal intervals on the outer periphery of the disk 20 and inclined from the axial direction. ing. A central water flow groove 23 is also formed in the axial center of the disc 20.

  When the cleaning liquid passes through the inclined water flow groove 22 of the nozzle guide 10, it becomes a vortex, which is jetted from the circular opening 15 and the jet 11 of the main body 9, and is jetted to the inner wall of the bathtub 2 and washed. be able to. When detergent is mixed in the hot water to be washed, the hot water and the detergent are efficiently mixed by using the vortex. In addition, the cleaning liquid can be ejected upward through the central water passage groove 23, whereby the inner surface of the lid (not shown) of the bathtub 2 can be cleaned.

  4 (a) and 4 (b) are diagrams illustrating a mounting structure in which the bathtub cleaning nozzle 1 according to the present invention is attached to the bottom 6 of the bathtub 2. FIG. An annular seal member 25 is attached to the opening 24 of the bottom 6 so as to sandwich the inner peripheral edge of the opening 24. The nozzle receiver 26 is disposed so as to come into contact with the seal member 25 from below.

  The nozzle receiver 26 includes a cylindrical portion 27, a flange portion 28 projecting radially from the cylindrical portion 27, and a suction port 29, and the upper portion of the cylindrical portion 27 is fitted in the seal member 25. On the inner surface of the nozzle receiver 26, a screw 17 ′ that is screwed with a screw 17 formed on the outer periphery of the cylindrical portion 13 of the bathtub cleaning nozzle 1 is formed.

  The main body portion 9 of the bathtub cleaning nozzle 1 is inserted through the opening 24 of the bottom portion 6 through the seal member 25, and further screwed into the cylindrical portion 27 of the nozzle receiver 26 to be mounted. Accordingly, the inner peripheral edge portion of the bottom portion 6 of the bathtub 2 is sandwiched between the head portion 16 of the main body portion 9 and the flange portion 28 of the nozzle receiver 26 via the seal member 25. In addition, a caulking material 30 for sealing is applied between the bottom 6 of the bathtub 2 and the flange 28 of the nozzle receiver 26 in order to improve the reliability of water blocking.

(Function)
The operation of the bathtub cleaning nozzle 1 according to the embodiment of the present invention having the above configuration will be described to clarify the features of the present invention. The cleaning water is supplied into the nozzle receiver 26 through the suction port 29, and further flows in the cylindrical portion 13 of the bathtub cleaning nozzle 1, passes through the nozzle guide 10, and passes from the nozzle 11 to the tank portion 3 and the bathtub cover. Spouts against the inner surface.

  In the course of the flow of such washing water, as shown in FIGS. 5A and 5B, the washing water passes through the inclined water passage groove 22 of the nozzle guide 10 as a water flow obliquely upward. And the nozzle guide 10 is the axial center line CC of the cylindrical part 13 of the bathtub washing nozzle 1 by the injection force of the water flow when washing water passes through the inclined water flow groove 22 (refer Fig.2 (a)). Rotate counterclockwise around the center.

  On the other hand, as shown in FIGS. 5 (a) and 5 (c), the wash water that has passed through the inclined water channel 22 as a water flow turns into a swirl flow around the clockwise direction in the neck portion 14, and the circular opening 15 through the jet nozzle. It flows toward 11. Furthermore, the washing water is jetted linearly from the jet nozzle 11 toward the periphery thereof. At the same time, the wash water that has passed through the central water flow groove 23 of the nozzle guide 10 passes through the circular opening 15 and is jetted directly upward from the jet outlet 11.

  As described above, the cleaning water that has swirled in the neck portion 14 toward the ejection port 11 by the nozzle guide 10 is sufficiently mixed when the detergent is mixed in the cleaning water, and the inner surface of the tank unit 3 from the ejection port 11 The inner surface of the bathtub 3 is effectively cleaned. Moreover, the wash water sprayed directly from the central water flow groove 23 of the nozzle guide 10 is sprayed onto the lid of the bathtub 2, and the inner surface of the lid of the bathtub 2 can be washed.

  Here, as shown in FIG. 6 (a), the direction of the spout 11 is shifted from the longitudinal direction O ′ of the drain groove 12 by a predetermined angle θ °, and the longitudinal direction O ′ of the drain groove 12 is By making it coincide with the longitudinal direction O, the direction of the spout 11 can be shifted by θ ° from the longitudinal direction O of the tank portion 3. Thus, the effect | action by the structure by which the direction of the jet nozzle 11 was installed is demonstrated with reference to FIG. 2, FIG. 4-7 compared with a comparative example.

  2 (b), FIG. 5 (e) and FIGS. 7 (a) and 7 (b), in the comparative example, the shape of the outlet 11 of the bathtub cleaning nozzle 1 is an ellipse, and the direction of the ellipse is (The direction of the arrow F in the figure) is made to coincide with the longitudinal direction O ′ of the pair of drain grooves 12, and the center line O extends through the drain groove 12 through the center of the outlet 11 and in the longitudinal direction of the tank portion 3. By making it correspond, it is set as the structure which makes the ellipse direction of the jet nozzle 11 of the bathtub washing nozzle 1 correspond with the centerline O extended in the longitudinal direction of the tank part 3. FIG.

  In the configuration of such a comparative example, the washing water becomes a swirling flow clockwise around the nozzle 11 by the nozzle guide 10 as in the present invention (see FIGS. 5A to 5C). It ejects linearly from the outlet 11 toward the periphery. In the process of research and development, the present inventors have obtained the knowledge that the washing water ejected from the ejection port 11 in this way is ejected to the region 31 indicated by the dotted line as shown in FIG. . Therefore, the cleaning water is sprayed to the inner surface of the region 19 of the end portion 32 in the longest longitudinal direction of the tank portion 3 and can be cleaned. In addition, the turning direction shown by the arrow R in FIG. 7A is the turning direction of the swirling flow of the cleaning water in the neck portion 14.

  Regions 33 and 34 connected to the inner surface of the end portion 32 in the longitudinal direction, more specifically, a corner region 33 on the same side as the swirling direction of the cleaning water (a rear region in the swirling direction) and a corner portion on the opposite side The region 34 (region on the near side from the turning direction) is shifted from the oval direction F of the ellipse and the distance is also long, so the jet of cleaning water to the corner regions 33 and 34 is at the end in the longitudinal direction. Therefore, the corner regions 33 and 34 are considered to be difficult to clean. However, as described above, since the cleaning water is jetted to the region 31 indicated by the dotted line shown in FIG. 7A, the corner region 33 is sufficiently jetted with the cleaning water, but FIG. As shown, the corner region 34 is difficult to clean. The reason is considered as follows.

  As shown in FIGS. 5A to 5C (this drawing is common to both the present invention and the comparative example), the washing water turns in a clockwise direction in the neck portion 14, passes through the circular opening 15, and is jetted. Although it ejects linearly from the outlet 11 toward the periphery thereof, the momentum of the swirling flow remains even in the process of ejecting from the outlet 11, and the washing water is not ejected radially from the center of the outlet 11. It is considered that the jet is linearly directed substantially in the direction of the swirling radiation (tangential direction of the swirling circle of the swirling flow). This is shown in FIG. 5 (d) for the present invention and in FIG. 5 (e) for the comparative example.

  The corner region 33 on the same side as the swirling direction of the cleaning water connected to the inner surface of the end portion 32 is shown in FIG. 7B (for the sake of simplicity, only the backrest side of the bathtub 3 is shown. In this way, it is formed so as to curve rightward from the inner surface of the end portion 32 along the swirling direction of the washing water (clockwise direction).

  Moreover, since the corner region 33 on the same side as the turning direction is located on the downstream side of the cleaning water sprayed linearly in the turning direction, the cleaning water sprayed on the inner surface of the end portion 32 It is easy to be injected also to the inner surface of the region 33 of the part, and the water flow from the region 19 on the front side also flows easily. Accordingly, it is considered that the corner region 33 on the same side as the swirling direction of the cleaning water that is continuous with the inner surface of the end portion 32 can be sufficiently cleaned with the cleaning water.

  On the other hand, as shown in FIG. 7B, the corner region 34 on the opposite side to the turning direction of the inner surface of the end portion 32 in the longitudinal direction of the tank portion 3 is deviated from the oval direction F of the ellipse and the distance. The cleaning water is not sprayed sufficiently. In addition, the wash water sprayed linearly on the long side portion 35 of the adjacent bathtub 2 on the near side in the turning direction on the opposite corner region 34 is the opposite corner region on the downstream side of the turning. It is difficult to inject and flow into 34, but rather falls into the bathtub 2 as if reflected after being injected into the long side portion 35.

  Therefore, with respect to the cleaning water sprayed on the adjacent long side portion 35 on the front side in the turning direction of the region 34 at the opposite corner portion, the phenomenon of injection or flow as in the region 33, that is, the inner surface of the end portion 32. It is considered that the phenomenon that the wash water sprayed on the inner surface of the corner 33 on the same side as the swirling direction of the adjacent wash water flows and flows as a water flow does not occur. Therefore, the problem is that the opposite corner region 34 is not sufficiently cleaned. Accordingly, as shown by the dotted line in FIG. 7A, the cleaning region is as if tilted with respect to the tank portion 3 in plan view.

  Under such knowledge, the inventors of the present invention have an elliptical shape of the outlet 11 of the bathtub cleaning nozzle 1 according to the present invention as shown in FIG. Is not aligned with the longitudinal direction O ′ of the pair of drain grooves 12 and is shifted by θ °. And the longitudinal direction O ′ of the pair of drain grooves 12 is used as a positioning mark, and this is used as a mark for positioning, so that it matches the center line O that passes through the center of the spout 11 and extends in the longitudinal direction of the tank portion 3. It was set as the structure which can be attached to the bottom part 6 of this.

  Thereby, the longitudinal direction F of the tank part 3 passes through the center of the jet nozzle 11 of the bathtub cleaning nozzle 1 and does not coincide with the center line O of the tank part 3, and the inside of the neck part 14 is cleaned with respect to this center line O. It is configured such that it can be installed with a predetermined angle shifted in the opposite direction from the water swirling direction. Here, the predetermined angle θ ° needs to be appropriately designed according to the shape and size of the tank unit 3, the flow rate of the cleaning water to be jetted, etc., but is set to an angle of 15 °, for example.

  With such a configuration, the elliptical ellipse direction F of the jet nozzle 11 of the bathtub washing nozzle 1 is also directed to the direction of the region 34 at the corner opposite to the swirling direction of the washing water. It is possible to clean the region 34 that is difficult to clean as shown in FIG. 7 (comparative example).

  Further, since the region 19 at the end portion 32 in the longitudinal direction and the region 33 having the same corner as the swirling direction of the cleaning water are located downstream in the swirling direction of the cleaning water, the cleaning water is jetted and easily flows into the cleaning water. Is done. Accordingly, the cleaning water is sprayed onto the region indicated by the dotted line 36 in FIG. 6A, and the entire inner peripheral surface of the tank portion 3 can be cleaned evenly.

  As mentioned above, although the best form for implementing the bathtub washing nozzle and bathtub concerning the present invention was explained based on the example, the present invention is not limited to such an example, and it is in a claim. It goes without saying that there are various embodiments within the technical scope described. For example, there is no particular need for a stool in the bathtub, and it can be said that it may be a rectangular bathtub.

  The bathtub cleaning nozzle according to the present invention having the above-described configuration can be applied as a bathtub cleaning nozzle for a substantially rectangular tank used not only for cleaning a bathtub but also in various fields including industrial use.

It is a figure explaining the bathtub in which the bathtub washing nozzle which concerns on this invention is attached, (a) is a top view, (b) is AA sectional drawing of (a), (c) is (a). It is BB sectional drawing. (A) is a figure explaining the Example of the bathtub washing nozzle which concerns on this invention, is sectional drawing of a bathtub washing nozzle, (b) shows the top view of the comparative example of a bathtub washing nozzle. It is a figure explaining the Example of the bathtub washing nozzle which concerns on this invention, (a) is a top view of the main-body part of a bathtub washing nozzle, (b) is AA sectional drawing of (a), (c ) Is a plan view of the nozzle guide, and (d) is a side view of the nozzle guide. It is a figure explaining the attachment structure which assembled | attached the bathtub washing nozzle which concerns on the Example of this invention to the bottom part of the bathtub, (a) is a top view, (b) is AA sectional drawing of (a). . (A)-(c) is a figure explaining the effect | action of the bathtub washing nozzle which concerns on this invention and a comparative example, (a) is the elements on larger scale of FIG. 2 (a), (b) is a nozzle guide. It is a top view explaining an effect | action, (c) is AA sectional drawing of (a), (d) is a figure explaining the direction which ejects washing water from an injection nozzle, (e) It is a figure explaining the direction which ejects cleaning water from the injection port in a comparative example. It is a figure explaining the effect | action of the bathtub washing nozzle which concerns on the Example of this invention. It is a figure explaining the effect | action of the comparative example of a bathtub washing nozzle.

Explanation of symbols

1 Bath cleaning nozzle
2 Bathtub
3 tank part
4 peripheral edge
5 Flange
6 Bottom
7 Seat
8 Drain tap
9 Body
10 Nozzle guide
11 Spout
12 Drain groove
13 Cylindrical part
14 Neck
15 circular opening
16 Dish-shaped head
17 Screw on the outer periphery of the cylindrical part 17 'Screw on the inner surface of the nozzle receiver
18 Insertion recess
19 Areas at both ends of the bathtub in the longitudinal direction
20 Nozzle guide disk
21 legs
22 Inclined water channel
23 Central water channel
24 Bottom opening
25 Seal member
26 Nozzle receptacle
27 Nozzle receptacle is cylindrical
28 Flange
29 Suction port
30 Caulking material
31 Region indicated by dotted line indicating peripheral region where water is injected (comparative example)
32 edge
33 Corner area in the same direction as the swirling direction of the washing water 34 Corner area in the opposite direction to the swirling direction of the washing water
35 Long side of bathtub
36 Dotted line indicating the peripheral area where water is sprayed evenly. F Oval direction of the nozzle
O Center line extending in the longitudinal direction of the tank section through the center of the injection port O ′ Direction of a pair of drain grooves (comparative example)

Claims (3)

  A bathtub cleaning nozzle comprising a main body part and a nozzle guide for generating a swirling flow fitted inside the main body part, wherein an elliptical spout and a drain groove are formed on the surface side of the main body part The bathtub washing nozzle is characterized in that the longitudinal direction of the water draining groove and the elliptical direction of the ellipse of the jet outlet do not coincide with each other and are shifted by a predetermined angle in the opposite direction from the swirling direction of the swirling flow.   It is a bathtub washing nozzle of Claim 1, Comprising: The longitudinal direction of the drain groove is substantially corresponded with the longitudinal direction of a bathtub, and is attached to the bottom part of a bathtub, The bathtub washing nozzle characterized by the above-mentioned.   It is the bathtub which attached the bathtub washing nozzle of Claim 1 or 2, Comprising: One bathtub washing nozzle was attached to the approximate center position of the bottom part of a bathtub, The bathtub characterized by the above-mentioned.

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