JP3709796B2 - Circulation adapter for bath - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a circulation adapter for a bathtub attached to the bathtub in order to connect a pipe for circulating hot water stored in the bathtub between the bathtub and the bathtub to the bathtub.
[0002]
[Prior art]
When using a forced circulation bath that forces the hot water stored in the bathtub to circulate between the bathtub and the bathtub, the bathtub and the bathtub must be connected by piping. A circulation adapter for pipe connection is attached to the bathtub.
[0003]
An example of this type of circulation adapter is shown in FIG. As shown in the figure, the circulation adapter 50 is composed of a synthetic resin adapter main body 51 attached to the bathtub and a stainless steel filter member 57 detachably attached to the adapter main body 51. The forward piping Ps and the return piping Pr leading to the bath are connected to the adapter main body 51 attached to the bathtub.
[0004]
The adapter body 51 has an inlet 53 for sucking hot water stored in the bathtub and an adapter head 52 formed with a discharge port 54 for discharging hot water in the bathtub. The adapter body 51 is attached to the bathtub. In the state, only the adapter head 52 protrudes into the bathtub.
[0005]
The filter member 57 is a cap-shaped member attached to the adapter head 52 portion protruding into the bathtub, and is provided continuously with a cylindrical portion 58 that covers the outer peripheral portion of the adapter head 52 and one end side of the cylindrical portion 58. And a circular filter portion 60. A large number of small holes 60 a are formed in the filter portion 60 covering the suction port 53 formed on the front surface of the adapter head 52, and the discharge port 54 formed on the outer peripheral surface of the adapter head 52 is formed in the cylindrical portion 58. An opening 58a for opening is formed.
[0006]
Therefore, when the filter member 57 is attached to the adapter head 52, the hot water sent from the bath pot through the forward piping Ps is directly from the discharge port 54 of the adapter head 52 and the opening 58a of the filter member 57. The hot water in the bathtub that is discharged into the bathtub but always returned to the bathtub is always sucked into the suction port 53 of the adapter head 52 through the small hole 60a of the filter unit 60. The presence of 57 prevents the hair, dust, and the like existing in the hot water stored in the bathtub from entering the adapter head 52.
[0007]
A plurality of convex portions 59 projecting inward are formed on the inner peripheral surface of the cylindrical portion 58. When the filter member 57 is attached to the adapter head 52 on the outer peripheral surface of the adapter head 52, the filter member A plurality of guide grooves 55 that guide the convex portions 59 of the 57 to a predetermined position and exhibit a function of preventing the filter member 57 from being removed are formed corresponding to the convex portions 59 of the filter member 57.
[0008]
The guide groove 55 includes an introduction groove 55a extending from the front end portion of the adapter head 52 in the fitting direction of the filter member 57, and a retaining groove 55b extending from the rear end portion of the introduction groove 55a in the circumferential direction of the adapter head 52. As shown in FIG. 13A, the retaining groove 55b is formed with a locking projection 56 protruding outward in the middle thereof.
[0009]
When the filter member 57 is attached to the adapter head 52 described above, first, the convex portion 59 of the filter member 57 is aligned with the introduction groove 55a portion of the guide groove 55 formed on the outer peripheral surface of the adapter head 52. When the filter member 57 is pushed in, the filter member 57 is fitted into the adapter head 52 while moving the convex portion 59 along the introduction groove 55a.
[0010]
Subsequently, when the filter member 57 is rotated in a direction in which the convex portion 59 of the filter member 57 can move along the retaining groove 55b, the convex portion 59 of the filter member 57 is removed from the retaining groove as shown in FIG. Although it abuts against the locking projection 56 formed in the middle of 55b, when a force is further applied to further rotate the filter member 57 in the same direction, as shown in FIG. By causing elastic deformation in the radial direction, the convex portion 59 of the filter member 57 moves over the locking convex portion 56 and moves to the end portion of the retaining groove 55b, and is generally positioned by the retaining convex portion 56 and the retaining groove 55b. Therefore, the filter member 57 is mounted at a predetermined position of the adapter head 52 (see FIG. 5C). Further, the filter member 57 attached to the adapter head 52 in this way can be easily detached from the adapter head 52 by performing the reverse operation.
[0011]
As described above, when the convex portion 59 of the filter member 57 gets over the locking convex portion 56, the rotational resistance of the filter member 57 changes abruptly. Therefore, a user who tries to attach the filter member 57 to the adapter head 52 By feeling the change in rotational resistance when the filter member 57 is rotated, it is possible to realize whether or not the filter member 57 is securely attached to the regular position of the adapter head 52.
[0012]
[Problems to be solved by the invention]
By the way, in the circulation adapter 50 as described above, the locking projection 56 formed in the retaining groove 55b of the adapter head 52 is normally formed integrally when the adapter head 52 is molded with resin, so that a considerable amount of time is required. Since the filter member 57 is rigid and requires a certain level of strength, it must be formed of at least a stainless plate having a thickness of about 1 mm. The rigidity must be high.
[0013]
In this way, the highly rigid filter member 57 is not greatly elastically deformed, so that the overlap margin between the locking projection 56 on the adapter head 52 side and the projection 59 on the filter member 57 side is slightly larger than the appropriate value. Then, the rotational resistance of the filter member 57 when the convex portion 59 on the filter member 57 side gets over the locking convex portion 56 on the adapter head 52 side increases, and the filter member 57 can be smoothly attached to and detached from the adapter head 52. There is a problem that cannot be done.
[0014]
On the other hand, when the overlap margin between the locking convex portion 56 on the adapter head 52 side and the convex portion 59 on the filter member 57 side is slightly smaller than the appropriate value, the convex portion 59 on the filter member 57 side is locked on the adapter head 52 side. The rotational resistance of the filter member 57 and the amount of change when the convex member 56 gets over are reduced, and it is difficult to obtain a feel for determining whether or not the filter member 57 is attached to the regular position of the adapter head 52. In addition, there is a problem that the filter member 57 properly attached to the adapter head 52 is easily detached.
[0015]
Therefore, when the adapter main body 51 and the filter member 57 are manufactured in the above-described circulation adapter 50 in which the high-rigidity filter member 57 must be attached to the adapter head 52 having the high-rigidity locking projection 56, it is difficult. Dimensional accuracy is required.
[0016]
Further, even when the locking projection 56 on the adapter head 52 side and the projection 59 on the filter member 57 side have an appropriate overlapping margin, the highly rigid filter member 57 is greatly elastically deformed. Therefore, when the filter member 57 is attached to and detached from the adapter head 52, that is, when the convex portion 59 on the filter member 57 side gets over the locking convex portion 56 on the adapter head 52 side, the locking convex portion 56 of the adapter head 52. A large pressing force is applied to.
[0017]
Therefore, as the filter member 57 is repeatedly attached and detached, the engaging convex portion 56 on the adapter head 52 side formed by the synthetic resin wears out, and the filter member 57 attached to the adapter head 52 within a short period of time. There is also a problem that when the filter member 57 is attached to the adapter head 52, it cannot be surely felt whether or not the filter member 57 is attached to the regular position of the adapter head 52.
[0018]
Therefore, the object of the present invention is to provide a bath having excellent durability that can reliably realize proper mounting workability and a stable mounting state without requiring strict dimensional accuracy in the adapter head or the filter member. The purpose is to provide a circulation adapter for a hook.
[0019]
[Means for solving the problems and effects thereof]
  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to the bathtub in order to connect a pipe for circulating hot water stored in the bathtub between the bathtub and the bathtub to the bathtub. A circulation adapter for a bath tub to be attached, comprising: an adapter head that protrudes to the inside of the bathtub in a state of being attached to the bathtub and formed with a suction port; and a filter member that is attached to the adapter head. A convex portion projecting inward is provided on the inner peripheral surface of the adapter head, and the convex portion of the filter member is disposed on the outer peripheral surface of the adapter head at a predetermined position when the filter member is attached to the adapter head. A guide groove for guiding the filter member is formed in the guide groove by elastic deformation.A leaf spring havingThe present invention provides a circulation adapter for a bath tub characterized by that. The “bath kettle” mentioned here includes a water heater with a bath kettle and a hot water heater with a bath kettle.
[0020]
  As described above, in this circulation adapter for a bathtub, when the filter member is attached to the adapter head, the convex part on the filter member side is the adapter head side.Leaf spring attached to the guide grooveAt the stage of passing through the locking projection ofLeaf springIs elastically deformed, so that the convex part on the filter member sideLeaf springEven if the overlap margin with the locking projection is set to be large to some extent, the filter member can be smoothly attached to the adapter head without receiving a large resistance.
[0021]
  Therefore, when the convex part of the filter member gets over the locking convex part, the adapter head and the filter member have strict dimensions like a conventional circulation adapter for a bath tub that relies only on elastic deformation of the highly rigid filter member. The accuracy is not required, the convex part on the filter member side and the adapter head sideLeaf springBy setting the margin of overlap with the locking convex part to be large to some extent, it is possible to reliably realize proper mounting workability and a stable mounting state.In particular, in this circulation adapter for a bath tub, not only the overlap margin between the convex part on the filter member side and the latching convex part of the leaf spring but also by adjusting the elastic force of the leaf spring on which the latching convex part is formed. In addition, the rotation resistance of the filter member and the amount of change when the convex part on the filter member side gets over the locking convex part of the leaf spring can be adjusted, so that proper mounting workability and stable mounting state are ensured. The effect that it becomes easy is acquired.
[0022]
  Also, the adapter head sideLeaf springIs elastically deformed so that the convex part on the filter member side isLeaf springAt the stage of passing through the locking projection ofLeaf springSince a large pressing force is not easily applied to the locking projection, even if the filter member is repeatedly attached to or detached from the adapter head,Leaf springThe locking projections are less likely to wear, and proper attachment / detachment workability and a stable mounting state can be maintained for a long time.
[0023]
  AlsoAs in the case of the circulation adapter for a bath pot according to claim 2,An insertion groove for inserting a peripheral portion of the leaf spring is formed on the side wall forming the guide groove, and the groove width of the insertion groove is larger than the thickness of the leaf spring. In this case, since the leaf spring is attached to the adapter head in a free state, the leaf spring is easily elastically deformed, and it is possible to obtain an effect that stress is not easily applied to the adapter head.
[0024]
In particular, when using a leaf spring in which the portion having the locking projection is formed narrow like the circulation adapter for a bathing pot according to claim 3, the locking projection is easily elastically deformed, It is possible to set a larger overlap margin between the convex portion on the filter member side and the engaging convex portion on the adapter head side.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. As shown in FIG. 1, the circulation adapter 1 for a bath tub includes an adapter body 10 that is attached to a bathtub, and a filter member 20 that is detachably attached to the adapter body 10. It is comprised from the main body member 11 and the piping connection member 17 attached to this main body member 11 so that attachment or detachment is possible.
[0026]
The main body member 11 is connected to the adapter head 12 and a large-diameter adapter head 12 having a suction port 12a for sucking hot water stored in the bathtub and a discharge port 12b for discharging hot water in the bathtub. The small-diameter male connection portion 16 is formed with a male screw 16a on the outer peripheral surface. The adapter head 12 and the male connection portion 16 are respectively connected to the suction port 12a and the discharge port 12b. A path (not shown) is formed.
[0027]
The pipe connecting member 17 includes a cup-shaped female-side connecting portion 18 having an outer flange at an open end, and a female screw 18a for screwing the male-side connecting portion 16 of the main body member 11 formed therein. The pipe connection member 17 is composed of two short pipes 19 for pipe connection connected to the side connection portion 18, and the male side connection portion 16 is screwed into the female side connection portion 18. When attached, the flow paths formed inside the main body member 11 communicate with the two short tubes 19 respectively. A packing P2 and a packing ring PR are attached to the outer flange of the female side connecting portion 18.
[0028]
In addition, in this circulation adapter 1 for the bath tub, hot water is sucked from the suction port 12a and the discharge port 12b regardless of which of the two short pipes 19 of the pipe connection member 17 is connected to the forward or return pipe to the bath tub. Hot water is discharged from the pipe, and either one of the two suction ports 12a formed in the adapter head 12 functions according to the connection pattern of the forward pipe and the return pipe.
[0029]
As shown in FIG. 2A, the adapter body 10 configured as described above has an open end of the female side connection portion 18 of the pipe connection member 17 in which the forward pipe and the return pipe are connected to the short pipes 19 and 19. With the male side connection portion 16 of the main body member 11 inserted into the mounting hole H through the packing P1 in a state where the outer side of the main body member 11 is aligned with the mounting hole H formed on the side wall of the bathtub B from the outside of the bathtub B. When screwed into the female side connection portion 18 of the member 17 and tightened, the side wall of the bathtub B is sandwiched between the main body member 11 and the pipe connection member 17 as shown in FIG. The adapter body 10 is attached to the bathtub B in a state of protruding into the bathtub B.
[0030]
As shown in FIG. 1, the filter member 20 is formed in a cap shape by drawing a stainless steel plate, and is attached to the adapter head 12 portion protruding into the bathtub B. The cylindrical portion 21 covering the outer peripheral portion of the adapter head 12 is formed with an opening 22 for opening the discharge port 12b formed on the outer peripheral surface of the adapter head 12, and the suction formed on the front surface of the adapter head 12 A large number of small holes 25 that exhibit a filter function are formed in the circular filter portion 24 that covers the mouth 12a.
[0031]
Further, as shown in FIG. 3A, the cylindrical portion 21 of the filter member 20 is formed with three convex portions 23 protruding inward from the inner peripheral surface thereof. On the outer peripheral surface of the adapter head 12 to which the portion 21 is fitted, when the filter member 20 is attached to the adapter head 12, as shown in FIG. The substantially L-shaped first guide grooves 13 and 13 for guiding the first and second guide grooves 13 and 13 and the remaining one convex portion 23 formed in the cylindrical portion 21 to the predetermined position and exhibiting the function of preventing the filter member 20 from being removed. The substantially U-shaped 2nd guide groove 14 in which the leaf | plate spring to attach is formed corresponding to the convex part 23 of the filter member 20, respectively.
[0032]
As shown in FIGS. 4A and 4B, the first guide groove 13 includes an introduction groove 13a extending from the front end portion of the adapter head 12 in the fitting direction of the filter member 20, and a terminal portion of the introduction groove 13a. Is formed of a retaining groove 13b having the same depth as that of the introduction groove 13a extending in the circumferential direction of the adapter head 12, and the groove width of the retaining groove 13b gradually decreases from the starting end portion toward the terminal end portion. Yes. Further, a locking projection 13c for positioning the convex portion 23 of the filter member 20 is formed at the end portion of the retaining groove 13b.
[0033]
As shown in FIGS. 5A and 5B, the second guide groove 14 also has an introduction groove 14 a extending from the front end of the adapter head 12 in the fitting direction of the filter member 20, similarly to the first guide groove 13. And a retaining groove 14b extending in the circumferential direction of the adapter head 12 from the end portion of the introduction groove 14a. The retaining groove 14b is approximately twice as long as the retaining groove 13b in the first guide groove 13. After the groove width once narrows from the starting end portion toward the intermediate portion, the groove width widens again from the intermediate portion toward the terminal portion.
[0034]
Further, the second guide groove 14 has a retaining groove 14b and an end portion of the introduction groove 14a connected to the retaining groove 14b that is one step deeper than the first guide groove 13 in order to accommodate the leaf spring. An insertion groove 14c for inserting the peripheral edge of the leaf spring is partially formed on the side wall forming the deep groove portion so that the leaf spring accommodated in the portion does not fall off.
[0035]
As shown in FIGS. 6A and 6B, the leaf spring 15 is formed of a stainless steel plate having a thickness of 0.3 mm so as to be along the bottom wall of the second guide groove 14 which is a housing portion. , Has a shape curved in the thickness direction. Further, in a plan view, like the shape of the retaining groove 14 b of the second guide groove 14, the central portion in the longitudinal direction is formed to be narrow, and the narrow portion protrudes outward so as to be local. Thus, a locking projection 15a that engages with the projection 23 of the filter member 20 is formed. In addition, the area | region enclosed with the dashed-dotted line in the figure (b) is a part inserted in the insertion groove 14c of the 2nd guide groove 14. FIG.
[0036]
As shown in FIG. 8A, the adapter head 12 described above is vibration welded to the head base end portion 12B at the head distal end portion 12A in which the discharge port 12b, the first guide groove 13 and the second guide groove 14 are formed. Accordingly, the retaining grooves 13b and 14b of the first guide groove 13 and the second guide groove 14 formed in the head distal end portion 12A are open to the base end portion side. That is, the side wall of the head end portion 12A on the base end side of the retaining grooves 13b and 14b is formed by the end surface of the head base end portion 12B, and the retaining grooves 13b and 14b form the head distal end portion 12A on the head base end portion. Completed by vibration welding to 12B. Therefore, after the leaf spring 15 is received in the deep groove portion of the second guide groove 14 while inserting the peripheral edge portion into the insertion groove 14c from the base end portion side of the head distal end portion 12A, as shown in FIG. By vibrating and welding the head distal end portion 12A to the head base end portion 12B, as shown in FIGS. 7 (a) and (b), the plate spring 15 is not dropped from the second guide groove 14, and the adapter It can be attached to the head 12.
[0037]
Thus, the insertion groove 14c supporting the peripheral portion of the leaf spring 15 is formed in the width direction and the depth direction so that the leaf spring 15 attached to the adapter head 12 can be elastically deformed freely. As shown in FIG. 7B, the leaf spring 15 is free in the radial direction and the circumferential direction of the adapter head 12 in the second guide groove 14.
[0038]
Further, as shown in FIGS. 9A and 9B, the distance L from the start end portion of the retaining groove 14 b in the second guide groove 14 to the locking convex portion 15 a of the leaf spring 15 is in the first guide groove 13. The convex portion 23 of the filter member 20 is shorter than the distance L1 from the start end portion to the terminal end portion (the locking projection 13c) of the retaining groove 13b, and the convex portion 23 guided by the first guide groove 13 is formed. The convex portion 23 guided by the second guide groove 14 comes into contact with the locking convex portion 15a of the leaf spring 15 immediately before reaching the end portion of the retaining groove 13b.
[0039]
When the filter member 20 is attached to the adapter head 12 described above, first, the first guide grooves 13 and 13 formed on the outer peripheral surface of the adapter head 12 are provided with the three convex portions 23 formed on the filter member 20. And after aligning with the start ends of the introduction grooves 13a, 13a, 14a in the second guide groove 14, by pushing the filter member 20, each convex part 23 is moved along the introduction grooves 13a, 13a, 14a, The filter member 20 is fitted into the adapter head 12.
[0040]
Subsequently, when the filter member 20 is rotated in a direction in which each convex portion 23 of the filter member 20 can move along the retaining grooves 13b, 13b, and 14b, each convex portion 23 extends along the retaining grooves 13b, 13b, and 14b. As shown in FIG. 10A, the convex portion 23 moving along the retaining groove 14b comes into contact with the locking convex portion 15a of the leaf spring 15 attached to the second guide groove 14, as shown in FIG. .
[0041]
Here, when a force is applied to further rotate the filter member 20 in the same direction, the convex portion 23 moving along the retaining groove 14b is engaged with the leaf spring 15 as shown in FIG. By pressing the convex portion 15a, the leaf spring 15 is elastically deformed, and the protruding amount of the locking convex portion 15a is reduced. Therefore, the convex portion 23 moving along the retaining groove 14b has an extremely large resistance. Get over the locking projection 15a without receiving it. When the convex part 23 moving along the retaining groove 14b thus gets over the latching convex part 15a, the leaf spring 15 returns to the initial state as shown in FIG. Since the protruding amount of the portion 15a increases again, the filter member 20 does not rotate in the reverse direction unless a similar force is applied.
[0042]
At this point, the convex portion 23 that has overcome the locking convex portion 15a of the leaf spring 15 is in a state where it can further move in the same direction along the retaining groove 14b, as shown in FIG. As shown in FIG. 4D, the other convex portion 23 moving along the retaining grooves 13b and 13b shorter than the retaining groove 14b is formed on the end portion of the retaining grooves 13b and 13b. Since it abuts on the high locking projection 13c, the rotation of the filter member 20 in the same direction is also prevented at this time, and the filter member 20 is held at the regular mounting position of the adapter head 12.
[0043]
Further, the filter member 20 attached to the adapter head 12 in this way can be easily detached from the adapter head 12 by performing the reverse operation.
[0044]
As described above, the circulation adapter 1 for a bath tub guides the convex portion 23 formed on the filter member 20 to a predetermined position in order to attach the filter member 20 to the regular position of the adapter head 12. A plate spring 15 having a locking projection 15 a is attached to the second guide groove 14 formed in the plate 12, and when the projection 23 of the filter member 20 gets over the locking projection 15 a of the plate spring 15, the plate spring 15 By adopting a configuration in which the protruding amount of the locking convex portion 15a is reduced by elastically deforming, the overlap margin between the convex portion 23 on the filter member 20 side and the locking convex portion 15a of the leaf spring 15 is set to be somewhat large. However, the filter member 20 can be smoothly attached to the adapter head 12 without receiving an extremely large resistance.
[0045]
Further, after the convex portion 23 of the filter member 20 has climbed over the locking convex portion 15a of the leaf spring 15, the amount of protrusion of the locking convex portion 15a increases as the leaf spring 15 returns to the initial state. The filter member 20 once mounted is not easily detached, and the filter member 20 is securely fixed to the adapter head 12.
[0046]
Further, when the convex part 23 of the filter member 20 gets over the locking convex part 15a of the leaf spring 15, the convex part 23 of the filter member 20 slightly exceeds the top of the locking convex part 15a of the leaf spring 15, Since the convex portion 23 of the filter member 20 is urged in the moving direction by the restoring force (biasing force) of the leaf spring 15, the filter member 20 gets over the locking convex portion 15a of the leaf spring 15 with a certain amount of momentum. The user who attaches and detaches can obtain a good feel for determining whether or not the filter member 20 is attached to the regular position of the adapter head 12.
[0047]
Therefore, the convex part of the filter member, which has high rigidity and is difficult to elastically deform, can be applied to the adapter head and the filter member like a conventional circulation adapter for a bath tub, which has to overcome the rigid convex part that is molded with resin. Strict dimensional accuracy is not required, and the overlap margin between the projection 23 on the filter member 20 side and the locking projection 15a on the adapter head 12 side is set to be large to some extent, so that the adapter head and the filter member Even if the dimensional accuracy is somewhat deteriorated, proper mounting workability and a stable mounting state can be reliably obtained.
[0048]
In addition, in the conventional circulation adapter for bath tubs, proper mounting workability and stable mounting state are ensured by adjusting the overlap margin between the convex part on the filter member side and the locking convex part on the adapter head side. However, in the circulation adapter 1 for the bath tub, not only the overlapping margin of the convex portion 23 of the filter member 20 and the locking convex portion 15a of the leaf spring 15 but also the leaf spring 15 in which the locking projection 15a is formed. By adjusting the elastic force, the rotational resistance of the filter member 20 and the amount of change when the convex portion 23 of the filter member 20 gets over the locking projection 15a of the leaf spring 15 can be adjusted. The effect that it becomes easy to ensure mounting workability and a stable mounting state is also acquired.
[0049]
Further, since the locking projection 15a on the adapter head 12 side is elastically deformed, a large pressing force is applied to the locking projection 15a when the projection 23 of the filter member 20 gets over the locking projection 15a of the leaf spring 15. In addition, since the locking projection 15a itself is formed of the same metal (stainless steel) as the material for forming the filter member 20, even if the filter member 20 is repeatedly attached to and detached from the adapter head 12, the locking projection 15a 15a is hard to be worn, and proper attachment / detachment workability and a stable mounting state can be maintained for a long time.
[0050]
In addition, as described above, the leaf spring 15 has the locking projection 15a formed with a narrow width, and is attached to the adapter head 12 in a free state. Therefore, the locking projection 15a is elastic. Since the adapter head 12 that is easily deformed and is not easily stressed is a resin molded product, the adapter head 12 does not cause creep failure.
[0051]
In the above-described embodiment, the leaf spring 15 that locally deforms the locking convex portion 15a is used. However, the present invention is not limited to this, and for example, FIGS. 11 (a) and 11 (b). As shown in (c), when the leaf spring 15 that is lifted up from the deep groove portion when attached to the second guide groove 14 is used, the plate does not deform the locking projection 15a portion. Since the locking protrusion 15a can be moved in the radial direction of the adapter head 12 by deforming the entire spring, the rotational resistance of the filter member 20 when the filter member 20 is mounted on the adapter head 12 is reduced. be able to.
[0052]
In the above-described embodiment, the leaf spring 15 is attached to the adapter head 12 by attaching the leaf spring 15 to the head distal end portion 12A and then vibrating and welding the head distal end portion 12A to the head base end portion 12B. However, for example, after vibration welding of the head front end portion 12A and the head base end portion 12B, both end portions in the longitudinal direction are formed at the start end portion and the end end portion of the retaining groove 14b in a state where the leaf spring 15 is curved. It is also possible to attach the leaf spring 15 to the adapter head 12 by inserting it into the inserted insertion groove 14c. However, in that case, the plate spring 15 is supported by the adapter head 12 only at both ends in the longitudinal direction of the plate spring 15.
[0053]
Further, in the above-described embodiment, the leaf spring 15 is attached to the adapter head 12 in a completely free state. However, the present invention is not limited to this, and the locking projection 15a portion is easily elastically deformed. If present, the leaf spring 15 can be fixed to the bottom wall of the deep groove portion of the second guide groove 14.
[0054]
In the above-described embodiment, the leaf spring 15 formed of metal (stainless steel) is used. However, a resin spring can be used as long as necessary strength can be ensured.
[0055]
In the embodiment described above, the leaf spring 15 formed with the locking projection 15a is attached to the adapter head 12. However, the present invention is not limited to this. For example, rubber that easily elastically deforms, The locking projection formed of synthetic resin can be fixed to the adapter head 12 or can be integrally formed with the adapter head 12.
[0056]
Moreover, in embodiment mentioned above, although the suction port 12a and the discharge port 12b demonstrated the 1-hole type bath adapter circulation adapter 1 formed in the same adapter head 12, the bath adapter circulation adapter of this invention, However, the present invention is not limited to this, and a filter is applied to the suction-side adapter head in the 2-hole type circulation adapter for a bath tub in which a suction-side adapter head having a suction port and a discharge-side adapter head having a discharge port are individually attached to a bathtub. Needless to say, the present invention can also be applied to the case where a member is mounted.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an embodiment of a circulation adapter for a bathtub according to the present invention.
FIGS. 2A and 2B are explanatory views for explaining a method of attaching the above-mentioned bathing pot circulation adapter to the bathtub.
FIG. 3A is a front view showing a filter member constituting the above-described bath tub circulation adapter, and FIG. 3B is a front view showing an adapter head constituting the same tub circulation adapter. is there.
4A is a side view of an adapter head showing a portion where a first guide groove is formed, and FIG. 4B is a side view of an adapter head (head tip portion) showing a portion where a first guide groove is formed on the base end side. It is an end view.
5A is a side view of an adapter head showing a portion where a second guide groove is formed, and FIG. 5B is a side view of an adapter head (head tip portion) showing a portion where a second guide groove is formed. It is an end view.
FIG. 6A is an end view showing a leaf spring housed in the second guide groove, and FIG. 6B is a plan view showing the leaf spring.
7A is a partially enlarged side view of the adapter head showing a state in which a plate spring is accommodated in the second guide groove of the above, and FIG. 7B is a state in which the plate spring is accommodated in the second guide groove of the same. It is an end elevation of the base end side of the adapter head (head distal end portion) showing.
8A is an exploded side view showing the adapter head of the above, and FIG. 8B is an explanatory view for explaining a method of accommodating the leaf spring in the second guide groove of the same.
FIGS. 9A and 9B are explanatory views for explaining the relative relationship between the first guide groove and the second guide groove.
FIGS. 10A to 10D are operation explanatory views for explaining the mounting operation of the filter member in the above-mentioned circulation adapter for bathing pots.
FIGS. 11A to 11C are schematic views showing deformation states of leaf springs in a circulation adapter for a bathtub according to another embodiment.
FIG. 12 is an exploded perspective view showing a conventional bath adapter for circulation.
FIGS. 13A to 13C are explanatory views for explaining a filter member mounting operation in the above-described circulation adapter for a bathing pot.
[Explanation of symbols]
1 Circulation adapter for bath
10 Adapter body
12 Adapter head
12a inlet
12b Discharge port
13 First guide groove
13a Introduction groove
13b Stop groove
13c Locking protrusion
14 Second guide groove
14a Introduction groove
14b Stop groove
14c Insertion groove
15 leaf spring
15a Locking convex part
20 Filter member
23 Convex
B Bathtub

Claims (3)

In order to connect a pipe for circulating hot water stored in the bathtub between the bathtub and the bathtub to the bathtub, a circulation adapter for the bathtub attached to the bathtub,
An adapter head formed with a suction port that protrudes inside the bathtub while attached to the bathtub,
A filter member attached to the adapter head,
On the inner peripheral surface of the filter member, a convex portion protruding inward is provided,
A guide groove for guiding the convex portion of the filter member to a predetermined position when the filter member is attached to the adapter head is formed on the outer peripheral surface of the adapter head.
A leaf spring having a latching convex part through which the convex part of the filter member can pass by being elastically deformed is attached to the guide groove so as to be elastically deformable. . An insertion groove for inserting a peripheral portion of the leaf spring is formed on the side wall forming the guide groove,
The circulation adapter for a bath tub according to claim 1, wherein the insertion groove has a groove width larger than a thickness of the leaf spring . The bath adapter according to claim 1 or 2, wherein the leaf spring is formed so that a portion having the locking projection is narrow.

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