JP3095648B2 - Suction port structure of circulation type bathtub - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suction port structure for a circulating bathtub which circulates water in the bathtub to generate a jet.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 16 and 17, a distal end portion of a suction pipe (c) is formed by projecting an opening on an inner wall surface (b) of a bathtub (a). The part is fixed to the inner wall surface (b) with a clamping nut (d) screwed to the outer periphery,
A cover body (f) having a built-in filter (e) for flowing hot and cold water is removably fitted to the holding nut (d) to cover the opening at the tip of the suction pipe (c). The suction port structure of a circulation bath is known.

[0003] In the suction port structure of the circulating bathtub, a fitting tube (g) is projected from the back of the cover body (f), and the fitting tube (g) is held by a clamping nut (d). And a part of the peripheral wall of the fitting tubular part (g) is separated from the other part to form an elastic locking piece (h), and the locking piece (h) is The cover body (f) is detachably locked to the outside of the holding nut (d) so as not to come off the holding nut (d). Further, a cover body (f) is formed by the base member (i) and the main cover member (nu) which are fitted and connected to each other, and the base member (i) and the main cover member (nu) are formed. A filter (e) is built in between them, and a fitting tube (g) is protrudingly provided behind the base member (g). Each of the base member (i) and the main cover member (nu) is formed in a dish shape having a peripheral wall, and the peripheral wall of the main cover member (nu) has a circumferentially long slot-shaped flow hole (lu). A plurality of holes are formed on the bottom wall of the main cover member, and a number of flow holes are formed on the bottom wall of the base member. ing.

In the circulating bathtub, as shown in FIG. 18, a circulating pipe (e) is provided outside the tub (a), and one end of the circulating pipe (e) serves as the suction pipe (c). A spout provided on the inner wall of the bathtub (a), which is connected to the inside of the bathtub (a) and the other end of the circulation pipe (e) faces the cover body (f) via the circulation pump (wa). ). Therefore, when the circulation pump (W) is operated, the hot water in the bathtub (B) is sucked from the suction pipe (C), and is spouted from the spout (F) through the circulation pipe (E), and the bathtub (B) is operated. It is returned and circulated. In this case, the hot and cold water in the bathtub (a) is sucked into the cover body (f) from the flow hole (l) of the main cover member (nu), and the flow hole (f) of the filter (e) and the base member (li). The water flows out of the cover body (f) through the water pipe (f), and is supplied from the suction pipe (c) to the circulation pipe (e). At that time, hair, dust, etc. mixed with the hot water are absorbed and removed by the filter (e), the hot water is purified, and the cleaned hot water is returned to the bathtub (a), and the hot water in the bathtub (a) is returned. Is circulated and cleaned.

[0005]

However, in the above-mentioned prior art, when the fitting tube (g) is fitted to the outside of the holding nut (d), only the locking piece (h) is fitted. It is bent outwardly against its elasticity, and the fitting cylinder (g)
Is fitted to the outside of the holding nut (d), and the locking piece (h) is resiliently restored by the holding piece (h).
However, since the fitting cylinder (g) and the holding nut (d) are fitted with almost no gap between each other, the fitted fitting cylinder (g) is locked. ) From the holding nut (d), it is difficult to remove the locked locking piece (h) from the holding nut (d).
Is curved and deformed by hand against its elasticity and removed,
The cover (f) was difficult to remove from the tip of the suction pipe (c).

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art, that is, the problem is that the cover body is securely fitted to the holding nut at the tip of the suction pipe, and Another object of the present invention is to provide a circulating bathtub suction port structure that can be easily removed.

[0007]

According to a first aspect of the present invention, a suction port structure for a circulating bathtub has a front end portion of an inlet pipe protruding from an inner wall surface of the bathtub, and the front end portion of the suction pipe is connected to the inner wall surface of the bathtub. It is fixed to the inner wall surface with a holding nut screwed to the outer circumference,
A suction port structure for a circulating bathtub in which a filter body is incorporated and a cover body for flowing hot and cold water is removably fitted to the holding nut to cover an opening at a tip portion of the suction pipe; A fitting tubular portion is projected from the back of the body, the fitting tubular portion is loosely fitted at an interval outside the holding nut, and a part of the peripheral wall of the fitting tubular portion is connected to another portion. The locking piece having elasticity is formed by separating the locking piece, the locking piece is deflected to the inside of the fitting cylinder, and the locking piece is removably locked to the outside of the holding nut. The above problem has been solved by the configuration.

According to a second aspect of the present invention, there is provided a suction port structure for a circulating bathtub according to the first aspect of the present invention, wherein a plurality of locking pieces are provided on a peripheral wall of a fitting cylindrical portion. It is characterized in that it is arranged at a position facing each other.

According to a third aspect of the present invention, there is provided a suction port structure for a circulating bathtub, wherein the base member and the cover main member cover the suction port structure of the circulating bathtub according to the first or second aspect. It is characterized in that a body is formed, a filter is sandwiched between the base member and the main cover member, and a fitting tubular portion is protrudingly provided behind the base member.

According to a fourth aspect of the present invention, there is provided a suction port structure for a circulating bathtub, wherein in the suction port structure for a circulating bathtub according to the third aspect, a projection protrudes from the lower peripheral wall of the base member. A locking groove is formed on the lower peripheral wall of the main cover member so as to open from the edge thereof, and the locking groove is locked to the locking protrusion, so that the main cover member becomes a base member. It is characterized by being detachably attached.

[0011]

In the suction port structure of the circulating bathtub according to the first aspect of the present invention, a tip portion of the suction pipe is formed to protrude from the inner wall surface of the bathtub, and a filter is built in the tip portion of the suction pipe. It is covered with a cover body that circulates hot and cold water, so hot water in the bathtub is sucked into the cover body,
Hair, dust and the like mixed in the hot water are adsorbed and removed by the filter, and the hot water is purified. Is done.

[0012] Further, the tip of the suction pipe is fixed to the inner wall surface of the bathtub with a holding nut screwed to the outer periphery thereof, and the cover body is detachably fitted to the holding nut.
A fitting tube is projected from the back of the cover body, the fitting tube is fitted outside the holding nut, and a part of the peripheral wall of the fitting tube is separated from other portions. And a locking piece having elasticity is formed. The locking piece is removably locked to the outside of the holding nut, so that the cover body can be easily fitted and attached. Can also be removed.

In addition, since the fitting cylinder is loosely fitted to the outside of the holding nut with a space therebetween and the locking piece is deviated to the inside of the fitting cylinder, the loosely fitted fitting is formed. The locking piece can be easily disengaged from the holding nut by bending the locking piece against its elasticity while wobbling the cylindrical portion, and the fitting piece in a loosely fitted state. The locking piece is also locked to the outside of the holding nut by its elasticity, so that the fitting tubular portion does not come off, absorbing external impact and preventing breakage. The cover body is fitted so as not to come off from the holding nut at the distal end portion, and the cover body is prevented from being damaged, and the cover body can be easily removed.

[0014] In the suction port structure of the circulating bathtub according to the second aspect of the present invention, in particular, since a plurality of locking pieces are disposed at opposing positions on the peripheral wall of the fitting tube portion, it is possible to reduce the number of engagement pieces. The locking state by the elasticity of the stop piece is balanced around the fitting cylinder, and the fitting cylinder is stably fitted.
The loosely fitted fitting tube is reciprocated in the same direction to easily wobble, and the locking piece can be removed very easily.

In the suction port structure for a circulating bathtub according to claim 3 of the present invention, in particular, a cover body is formed by the base member and the cover main member, and the cover member is formed between the base member and the cover main member. The filter is clamped and built in, and the fitting cylinder is projected behind the base member, so the filter is securely fixed so that it does not rattle, and the cover body is divided The filter can be easily replaced.

[0016] In the suction port structure of the circulating bathtub according to claim 4 of the present invention, in particular, a locking projection is provided on the outer peripheral surface of the lower peripheral wall of the base member, and the lower peripheral wall of the main cover member is formed. A locking groove opening from the end is formed, and the locking groove is locked to the locking protrusion, and the main cover member is detachably attached to the base member. The cover main member detachably attached by being locked by the locking protrusion is securely attached so as not to be inadvertently detached from the base member,
In addition, the locking groove and the locking protrusion are provided on the lower side, so that it is difficult to see from the upper side, and there is no problem in appearance.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The suction port structure of a circulating bathtub shown in FIGS. 1 and 2 is an embodiment of the present invention. 3 is fixed to the inner wall surface 2 with a holding nut 4 screwed to the outer periphery thereof, and a cover 6 having a built-in filter 5 for flowing hot and cold water is detachably fitted to the holding nut 4. A suction port structure of a circulating bathtub that is fitted and covered with an opening at a tip portion of the suction pipe 3, wherein a fitting tube 7 is projected from the back of the cover body 6. The part 7 is loosely fitted to the outside of the holding nut 4 at intervals, and a part of the peripheral wall of the fitting cylindrical part 7 is separated from other parts to form an elastic locking piece 8. The locking piece 8 is deflected to the inside of the fitting cylinder 7, and the locking piece 8 is removably locked to the outside of the holding nut 4. .

In the suction port structure of the circulating bathtub, a plurality of locking pieces 8 are provided in two pairs at opposing positions on the peripheral wall of the fitting tube 7. Further, a cover body 6 is formed by the base member 9 and the main cover member 10, and the filter 5 is sandwiched and built in between the base member 9 and the main cover member 10. The fitting tube 7 is provided in a protruding manner. In this case, as shown in FIG. 4, a locking protrusion 11 is provided on the outer peripheral surface of the lower peripheral wall of the base member 9, and a locking groove 12 opening from the edge thereof is formed on the lower peripheral wall of the main cover member 10. The locking groove 12 is locked by the locking protrusion 11, and the main cover member 10 is detachably attached to the base member 9.

In the circulation type bathtub of this embodiment, as shown in FIG. 3, a circulation pipe 13 is provided outside the bathtub 1 and one end of the circulation pipe 13 is connected to the inside of the bathtub 1 as the suction pipe 3. The other end of the circulating pipe 13 is connected through a circulating pump 14 to a jet port 16 provided on an opposing wall 15 of the bathtub 1 opposing the cover 6. A pair of branch pipes 17 project upward from the circulating pump 14, and a pair of auxiliary jets provided at upper ends on both sides of the circulating pump 14 in the opposite wall 15 of the bathtub 1. The outlets 18 are connected to each other. In addition, an intake pipe 21 that is communicated and suspended from an air intake port 20 provided in the flange portion 19 of the bathtub 1 is connected to the circulating pump 14 and is connected to the air intake port 20.
Is sucked into the circulating pump 14 through the suction pipe 21 into the hot and cold water jetted from the jet port 16 and the auxiliary jet port 18, and a bubble jet is jetted from the jet port 16 and the auxiliary jet port 18. .

In this case, when the circulation pump 14 is operated, the hot water in the bathtub 1 is sucked in from the suction pipe 3 and is jetted out of the jet port 16 and the auxiliary jet port 18 through the circulation pipe 14 as a bubble jet stream. It is returned and circulated. The bubble jet ejected from the ejection port 16 hits near the waist of the person, and the bubble jet ejected from both auxiliary ejection ports 18 hits near both the shoulders of the person, thereby effectively stiffening the waist and shoulders of the person. To be relaxed. At the same time, hair, dust and the like mixed with the circulated hot water are adsorbed and removed by the filter 5 in the cover body 6, and the hot water is cleaned, and the hot water in the bathtub 1 is circulated and cleaned.

As shown in FIG. 1, a through-opening 22 is formed in a wall portion of the inner wall surface 2 of the bathtub 1, and a distal end portion of the suction pipe 3 is inserted into the through-opening 22. A flange-like portion 23 protruding from the suction pipe 3 is abutted on a peripheral portion of the through-opening 22 through a packing material 24, and the packing material 24 is provided between the outer circumference of the suction pipe 3 and the inner circumference of the through-opening 22. The holding nut 4 is screwed into the male screw part 25 formed on the outer periphery of the inserted distal end of the suction pipe 3 from the inside of the bathtub 1 so that the distal end of the suction pipe 3 is It is fixed to the inner wall surface 2 of the bathtub 1. A concave step 26 is formed on the outer circumference of the holding nut 4, and the tip convex section 27 of the locking piece 8 is elastically locked to the concave step 26. A holding cylinder 28 is integrally provided inside the suction pipe 3 toward the center of the opening at the tip thereof, and a fixing bolt is attached to the tip of the holding cylinder 28.
An auxiliary filter 30 is attached by 29. The auxiliary filter 30 is made of a mesh material and is formed in a bowl shape that matches the inner periphery of the suction pipe 3.

The cover body 6 is formed of a base member 9 and a main cover member 10, and a large number of flow holes 31 are formed at the bottom of the base member 9, and The filter 5 is fitted and held in the filter 9 and communicates with the suction pipe 3 through the flow hole 31.

The base member 9 is, as shown in FIGS.
The large-diameter cylindrical portion 32 and the small-diameter cylindrical portion 33 are formed in a short cylindrical shape continuous in the cylindrical direction, and the disk portion 34 provided inside the large-diameter cylindrical portion 32 has the large number of the flow holes 31 formed therein. It will be the bottom part.
The disk portion 34 is partially joined to and integrated with the inner periphery of the small-diameter cylindrical portion 33 at a peripheral portion thereof by a plurality of joining pieces 35, and a flow gap 37 is formed between the joining pieces 35. Have been. A plurality of stop projections 36 are provided on the inner periphery of the boundary between the large-diameter tube portion 32 and the small-diameter tube portion 33. The plurality of stop projections 36
And the filter 5 is brought into contact with the disk portion 34 to form a large-diameter cylindrical portion.
It is fitted and held in 32. Further, a plurality of projecting wall portions 38 are extended from an opening end edge of the large-diameter cylindrical portion 32, and each of the projecting wall portions 38
A notch 39 for distribution is formed between them. In addition, large-diameter cylindrical part 32
The protrusion 11 is provided on the outer peripheral surface of the lower peripheral wall of the lower peripheral wall.
Finger contact projections 40 are provided on both sides of the outer peripheral surface of the lower peripheral wall 33. The outer surface of the finger contact convex portion 40 is concavely curved so as to be easily conformed when a fingertip is applied. The base member 9 and the main cover member 10 can be easily divided. On the outer surface of the projecting wall portion 38 on both sides of the large-diameter cylindrical portion 32, a locking groove 41 bent substantially in an L-shape is formed.
Are open at the front edge portions of the protruding wall portions 38, respectively.

As shown in FIGS. 5 and 6, the main cover member 10 is formed in a cylindrical shape having a circular bottom and a peripheral wall. A narrow suction opening 46 is formed, and a large suction wide opening 47 having two elongated holes in the circumferential direction is formed below the peripheral wall. Further, a locking groove 12 which is opened from an end edge thereof and is bent substantially in an L-shape is formed in the lower middle of the peripheral wall, and the locking protrusion 11 is formed in the locking groove 12. It is inserted from its end opening and slide-locked. At this time, as shown in FIG. 5C, a small protrusion 43 is protruded from a side edge portion of the locking groove 12, and the locking protrusion 11 is locked to the small protrusion 43. The locking projection 11 is a locking groove.
It does not come off accidentally from 12. Also, on both inner peripheral surfaces of the peripheral wall, locking convex pieces 42 are provided so as to protrude, and the both locking convex pieces 42 are formed in the both locking concave grooves 41 similarly to the case of the locking projection 11. It is inserted and slide-locked. Further, a plurality of protruding step pieces 44 are protruded from the inner peripheral corner portion of the peripheral wall, and the protruding step pieces 44 are brought into contact with the leading edge of the protruding wall section 38 of the base member 9. You. Further, the lower half of the edge portion of the peripheral wall is absent as a cutout opening 48 for exposing the finger contact convex portion 40. Further, a large number of arc-shaped long holes 45 are formed in the bottom wall portion of the main cover member 10 in an array.

The cover member 6 in which the base member 9 and the main cover member 10 are fitted and integrated by housing the filter 5 therein.
However, as shown in FIG. 1, it is fitted to a holding nut 4 at the distal end of the suction pipe 3. In this case, three supporting projections 49 are provided on the front surface of the holding nut 4 in the circumferential direction, and the supporting projections 49 abut against the bottom portion of the base member 9 so that the bottom portion is sucked. A gap is secured between the pipe 3 and the distal end portion so that hot and cold water flows without any trouble. The cover 6 is, as shown in FIG.
The suction tube 3 is detached from the holding nut 4 at the distal end. In this case, as shown in FIG. 10, when the cover body 6 is pressed upward from the lower side, the upper locking piece 8 is disengaged from the holding nut 4, and as shown in FIG. When pressed to the side, the locking pieces 8 on the other side come off the holding nut 4, and thus the locking pieces 8 are easily removed sequentially by shifting the cover body 6. That is,
As shown in FIG. 12, when the cover body 6 is pressed to change from the state shown in FIG. 12A to the state shown in FIG. 12B, the locking piece 8 located on the pressed side is curved and deformed and located on the opposite side. The locking piece 8 is easily removed.

The cover body 6 removed from the distal end of the suction pipe 3 is disassembled into a base member 9 and a main cover member 10 as shown in FIG. 13, and the built-in filter 5 is taken out. In this case, as shown in FIG. 14, the base member 9 is sandwiched by touching the fingertips to the finger contact projections 40 on both sides, and FIG.
(B) The main cover member 10 is turned and removed in the order of (c) to release the locking protrusion 11 from the locking groove 12 and at the same time, the locking protrusions on both sides inside the main cover member 10. 42
The base member 9 and the main cover member 10 are easily disassembled. Thus, the cover 6
Is disassembled into the base member 9 and the main cover member 10, whereby the built-in filter 5 can be easily taken out, and the work of cleaning or replacing the filter 5 becomes easy.

In the suction structure of the circulating bathtub of this embodiment, the hot water in the bathtub 1 is supplied from the small suction opening 46, the large suction opening 47 and the arc-shaped long hole 45 of the main cover member 10 to the cover body 6.
Is sucked into the disk portion of the base member 9 from the filter 5
A flow hole 31 formed in 34 and a flow gap at a peripheral portion thereof
The water flows out of the cover body 6 through 37 and is supplied from the suction pipe 3 to the circulation pipe 13.

Therefore, in the suction port structure of the circulating bathtub of this embodiment, the opening at the tip of the suction pipe 3 is covered by the cover 6 in which the filter 5 is incorporated and through which hot and cold water flows. Hot water in the bathtub 1 is sucked into the cover body 6, and hair, dust and the like mixed in the hot water are absorbed and removed by the filter 5, and the hot water is purified, and the purified hot water circulates from the suction pipe 3. The water is returned to the bathtub 1 and the hot and cold water in the bathtub 1 is circulated and cleaned. Further, a fitting cylinder 7 projects from the back of the cover body 6, and the fitting cylinder 7 is fitted to the outside of the holding nut 4.
A part of the peripheral wall is cut off from the other part to form an elastic locking piece 8, and the locking piece 8 is removably locked to the outside of the holding nut 4, so that the cover 6 Can be easily fitted and attached, and the cover body 6 can be removed.

Further, since the fitting cylinder 7 is loosely fitted to the outside of the holding nut 4 with a space therebetween and the locking piece 8 is deflected to the inside of the fitting cylinder 7, the loose fitting is achieved. The locking piece 8 is bent and deformed against its elasticity while wobbling and moving the fitting cylinder 7, so that the locking piece 8 can be easily removed from the holding nut 4. In addition, even in the fitting cylinder portion 7 in the loosely fitted state, the locking piece 8 is locked to the outside of the holding nut 4 by its elasticity, and the fitting cylinder portion 7 does not come off and does not come off. Shock is absorbed and damage is prevented,
Therefore, the cover body 6 is fitted so as not to come off the holding nut 4 at the distal end portion of the suction pipe 3 and the cover body 6
Is prevented, and the cover body 6 can be easily removed.

In the suction port structure of the circulating bathtub of this embodiment, in particular, since the plurality of locking pieces 8 are arranged at opposing positions on the peripheral wall of the fitting tube 7, the locking is achieved. Piece 8
The engagement state by the elasticity is balanced around the fitting cylinder 7 so that the fitting cylinder 7 is stably fitted.
The loosely fitted fitting cylindrical portion 7 is easily reciprocated in the same direction to be wobble easily, and the locking piece 8 can be removed very easily. Further, the cover member 6 is formed by the base member 9 and the main cover member 10, and the filter 5 is sandwiched and built in between the base member 9 and the main cover member 10. It is securely fixed inside so that it does not move, and
The cover 6 can be divided and the filter 5 can be easily replaced. Further, the main cover member 10 detachably attached by the engagement of the engagement groove 12 with the engagement protrusion 11 is securely attached so as not to be inadvertently detached from the base member 9, and The locking groove 12 and the locking protrusion 11 are provided on the lower side, so that it is difficult to see from the upper side, and there is no problem in appearance.

[0031]

As described above, in the suction port structure of the circulating bathtub according to the first aspect of the present invention, the fitting tube portion is loosely fitted to the outside of the holding nut with a space therebetween and locked. The piece is deflected to the inside of the fitting tube part, and the loosely fitted fitting tube part wobble and deforms the locking piece against its elasticity to bend and deform, thereby clamping the locking piece. It can be easily removed from the nut, and even in the case of the fitting tube portion in the loosely fitted state, the locking piece is locked to the outside of the holding nut by its elasticity, so that the fitting tube portion does not come off. In addition, the shock from the outside is absorbed and the breakage is prevented, so that the cover body is fitted so as not to come off the holding nut at the distal end portion of the suction pipe, and the cover body is prevented from being broken. The cover can be easily removed.

In the suction port structure for a circulating bathtub according to claim 2 of the present invention, in particular, a plurality of locking pieces are disposed at opposing positions on the peripheral wall of the fitting tube. The locking state by the elasticity of the stop piece is balanced around the fitting cylinder, the fitting cylinder is stably fitted, and the loosely fitted fitting cylinder is reciprocated in the same direction. It is easy to wobble and the locking piece can be removed very easily.

In the suction port structure for a circulating bathtub according to claim 3 of the present invention, in particular, a cover body is formed by the base member and the cover main member, and the cover member is formed by the base member and the cover main member. The filter is sandwiched and built in, and the filter is securely fixed so that it does not rattle, and the filter can be easily replaced by dividing the cover body.

Further, in the suction port structure of the circulating bathtub according to the fourth aspect of the present invention, in particular, the cover main member detachably attached by the locking groove being locked by the locking protrusion. Is securely attached to the base member so as not to be inadvertently detached from the base member, and the locking groove and the locking protrusion are provided on the lower side, so that it is difficult to see from the upper side, and there is no problem in appearance.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a suction port structure of a circulating bathtub according to one embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a schematic sectional view showing a use state of the circulation bathtub.

FIG. 4 is a perspective view showing a suction port structure of the circulating bathtub.

5 (a) is a front view, FIG. 5 (b) is a plan view, and FIG. 5 (c) shows a main cover member in the suction port structure of the circulation type bathtub.
Is a bottom view, and (d) is a right side view.

6A is a rear view showing the main cover member, and FIG.
FIG. 6 is a sectional view taken along line BB in FIG.

7A is a front view, FIG. 7B is a bottom view, and FIG. 7C is a left side view showing a base member in the suction port structure of the circulating bathtub.

8A is a rear view showing the base member, and FIG. 8B is a sectional view taken along the line CC in FIG. 7A.

FIG. 9 is a perspective view showing a state where a cover body is removed from the suction port structure of the circulation type bathtub.

FIG. 10 is a cross-sectional view of a principal part showing one operation state when removing a cover body in the suction port structure of the circulation type bathtub.

FIG. 11 is a cross-sectional view of a principal part showing another operation state when removing the cover body in the suction port structure of the circulation type bathtub.

12A and 12B are main-portion cross-sectional views illustrating an operation process when removing a cover body in the suction port structure of the circulation-type bathtub.

FIG. 13 is a perspective view showing a state where a cover body is divided in the suction port structure of the circulation type bathtub.

FIG. 14 is a perspective view showing a dividing operation state of the cover body.

15A, 15B, and 15C are bottom views showing a process of dividing the cover body.

FIG. 16 is a partially cutaway sectional view showing a suction port structure of a circulating bathtub as a conventional example of the present invention.

FIG. 17 is a cross-sectional view of a main part showing a suction port structure of the circulation bathtub according to the conventional example.

FIG. 18 is a schematic cross-sectional view showing a usage state of the circulation bathtub according to the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bathtub 2 Inner wall surface 3 Suction pipe 4 Clamping nut 5 Filter 6 Cover body 7 Fitting cylinder part 8 Locking piece 9 Base member 10 Cover main member 11 Locking protrusion 12 Locking groove

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A61H 23/00

Claims (4)

(57) [Claims] 1. A front end portion of a suction pipe is formed on an inner wall surface of a bathtub so as to open and protrude, and the front end portion of the suction pipe is fixed to the inner wall surface by a holding nut screwed to an outer periphery thereof, and a filter is built in. A suction port structure for a circulation bathtub, wherein a cover body through which hot and cold water is circulated is detachably fitted to the holding nut and an opening at a tip end portion of the suction pipe is covered with the cover body. The fitting tube portion is protruded toward the outside, the fitting tube portion is loosely fitted at an interval outside the holding nut, and a part of the peripheral wall of the fitting tube portion is separated from other portions to be elastic. A suction piece having a circulating tub formed by disengaging the locking piece to the inside of the fitting cylindrical portion and detachably locking the locking piece to the outside of the holding nut. Mouth structure. 2. The suction port structure for a circulating bathtub according to claim 1, wherein a plurality of locking pieces are arranged at opposing positions on the peripheral wall of the fitting tube. 3. A cover body is formed by the base member and the main cover member, a filter is sandwiched between the base member and the main cover member, and a fitting tubular portion is provided behind the base member. The suction port structure for a circulating bathtub according to claim 1 or 2, wherein the suction port structure is provided. 4. A locking projection protruding from an outer surface of a lower peripheral wall of a base member, and a locking groove opening from an end edge of the lower peripheral wall of the cover main member is formed. The suction port structure of the circulation bathtub according to claim 3, wherein the main cover member is detachably attached to the base member by being locked by the locking protrusion.