JP4853643B2 - Jet bath equipment - Google Patents

Description

  The present invention relates to a jet bath apparatus that jets a jet into a bathtub, and more particularly to a jet bath apparatus that jets a jet swirled around a nozzle central axis.

  Conventionally, there are jet nozzles provided on the bathtub wall, and jets are jetted from the nozzles into the bathtub, but most of them jet jets straight, and jets are part of the bather's body. It was difficult to get a variety of massage feelings because the stimulation received locally by the jet was monotonous and easy to get bored.

  Patent Document 1 discloses a nozzle body in which an outer shape is substantially circular and a jet port provided inside is eccentric from the axial center position and is rotatably accommodated in a unit jet port cover, and water in a bathtub. A nozzle device is disclosed that includes an orifice that injects the nozzle at a predetermined pressure into a jet hole of the nozzle body. Water in the bathtub is injected at a predetermined pressure into the jet hole of the nozzle body through the orifice, mixed with air to become a bubble mixed jet, and jetted into the bathtub from the jet port of the jet hole as a jet jet. At this time, since the jet port of the nozzle body is provided at a position eccentric with respect to the axial center position, the nozzle body is rotated by the jet flow from the orifice, and thereby the rotating jet flow in which the jet direction of the jet jet is changed. Is obtained.

However, since Patent Document 1 is configured to generate a rotating jet by rotating the nozzle body, the structure for rotatably supporting the nozzle body is complicated and cannot be manufactured at low cost. Furthermore, there is a concern that the rotational performance may be degraded due to wear of the rotating sliding portion or clogging of dust.
Japanese Patent Laid-Open No. 2001-8998

  The present invention provides a jet bath apparatus that can realize jet jetting while changing the jetting direction without providing a rotating sliding portion.

  According to one aspect of the present invention, a bathtub, a suction port that sucks in the bathtub water that is opened in the bathtub wall of the bathtub and is stored in the bathtub, a circulation path that communicates with the suction port, and the circulation path A pressurizing device that is provided in the middle and pressurizes and discharges the bath water sucked from the suction port, and pressurizing bath water sent from the pressurizing device via the circulation path while changing the jet direction. A jet nozzle that jets into the interior of the bathtub, and the jet nozzle communicates with the running water introduction section where the pressurized bathtub water is introduced, and the running water introduction section on the downstream side of the running water introduction section. A flow path cross-sectional contraction part in which a flow path cross-section is reduced with respect to the introduction part, and a flow path cross section with respect to the flow path cross-section contraction part. Has a rapidly expanding section of the channel cross section whose section has been expanded rapidly at the upstream end. A nozzle body that is provided in the interior and is held on the bathtub wall; and a nozzle that is detachably attached to the nozzle body and that has a spout that communicates with the chamber and faces the interior of the bathtub. There is provided a jet bath apparatus comprising a cap and a shielding member provided to face the chamber in the vicinity of the jet port and blocking a part of a flow path leading to the jet port.

  ADVANTAGE OF THE INVENTION According to this invention, the jet-bath apparatus which can implement | achieve jet-jetting, changing a jetting direction, without providing a rotation sliding part is provided.

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

Drawing 3 is a mimetic diagram showing a schematic structure of a jet bath device concerning an embodiment of the present invention.
FIG. 4: is the schematic diagram which looked at the bathtub from the side surface direction in the same jet bath apparatus.

  The jet bath device according to the present embodiment includes a bathtub 1, a suction port 5 opened in the bathtub wall 3 b of the bathtub 1, circulation paths 13 and 14 communicating with the suction port 5, and midway in the circulation paths 13 and 14. A pump 7 which is a pressurizing device provided and a jet nozzle 11 held against the bathtub wall 4a are provided.

  As illustrated in FIG. 3, the bathtub 1 includes a pair of long-side bathtub walls 3 a and 3 b facing each other substantially in parallel and a pair of short-side bathtub walls 4 a and 4 b facing each other substantially in parallel.

  The suction port 5 is formed in the long side bathtub wall 3b. When the pump 7 is driven, the bath water (including hot water) stored in the bathtub 1 is sucked into the circulation path 13 through the suction port 5.

  In general, the bather leans back on one short side bathtub wall (short side bathtub wall 4a in the specific example shown in FIG. 3), and the other short side bathtub wall (in the specific example shown in FIG. 3). In order to bathe in a posture in which the foot is directed to the short side bathtub wall 4b), when the suction port 5 is formed on the short side bathtub wall, the suction port 5 is blocked by the bather's back or sole, and the pump 7 There is a concern that excessive load will be applied. Therefore, it is desirable to form the suction port 5 in the long side bathtub wall that is not easily blocked by a part of the body of the bather. In addition, in the specific example shown in FIG. 3, although the inlet 5 was formed in the long side bathtub wall 3b, you may form in the long side bathtub wall 3a.

  One end of the circulation path 13 is connected to the suction port 5, and the other end is connected to the suction port of the pump 7. One end of the circulation path 14 is connected to the discharge port of the pump 7, and the other end is connected to the flowing water inlet of the jet nozzle 11. The pump 7 sucks bathtub water into the circulation path 13 from the suction port 5, pressurizes the sucked bathtub water, and discharges it to the circulation path 14 on the downstream side of the pump 7. The pressurized bathtub water discharged from the pump 7 flows into the flowing water inlet of the jet nozzle 11. In order to drain the residual water inside the pump 7 when not in use, the pump 7 is preferably provided above the jet nozzle 11.

  In this specific example, as shown in FIG. 3, two jet nozzles 11 are attached to one short side bathtub wall 4a. The two jet nozzles 11 are provided at substantially the same height for a predetermined distance. A bathtub-side faucet is provided above the other short-side bathtub wall 4b on the opposite side of the one short-side bathtub wall 4a to which the jet nozzle 11 is attached, and in the vicinity of the other short-side bathtub wall 4b. A drain outlet is provided at the bottom of the bathtub. Therefore, the bather normally takes a bath with a posture in which the back is directed to the short side bathtub wall 4a on the side where the jet nozzle 11 is provided.

  FIG. 1 is a schematic cross-sectional view of the jet nozzle 11.

  The jet nozzle 11 includes a cylindrical nozzle body 40 provided with a running water inlet 21 communicating with the circulation path 14 at one end (upstream end).

  In the nozzle body 40, a mounting portion 42 protruding in the radial direction in a flange shape is integrally provided around the outer peripheral surface on the other end side (downstream side). A stepped hole 43 is formed in a radially inward portion at one end (downstream end) of the mounting portion 42. Around the annular surface 45 formed on the downstream side of the annular bottom surface 44 in the stepped hole 43, a flange portion 46 projecting radially outward from the annular surface 45 is provided.

  The nozzle body 40 is held against the short-side bathtub wall 4a via the flanged attachment member 70. The flanged attachment member 70 includes a cylindrical portion 70b and a flange portion 70a provided integrally with one end of the cylindrical portion 70b. The flanged attachment member 70 is attached to the outside of the short side bathtub wall 4a with the hollow hole facing the opening formed in the short side bathtub wall 4a. A seal ring 71 is interposed between the flange portion 70a of the flanged attachment member 70 and the outer wall surface of the short side bathtub wall 4a.

  The outer peripheral surface of the mounting portion 42 of the nozzle main body 40 is screwed to the inner peripheral surface of the cylindrical portion 70b of the flanged mounting member 70, whereby the nozzle main body 40 is held against the short side bathtub wall 4a. The downstream end of the mounting portion 42 of the nozzle body 40 faces the inside of the bathtub through an opening formed in the short side bathtub wall 4a, and the flange portion 46 of the nozzle body 40 faces the inner wall surface of the short side bathtub wall 4a. Yes. A seal ring 72 is interposed between the flange portion 46 and the inner wall surface of the short side bathtub wall 4a.

  The shield 27 and the nozzle cap 60 are detachably attached to the nozzle body 40 in the stepped hole 43 of the nozzle body 40.

  A running water inlet 21 provided at the upstream end of the nozzle body 40 is connected to the circulation path 14 outside the bathtub 1. Inside the nozzle body 40 between the flowing water inlet 21 and the jet outlet 26 formed at the downstream end of the nozzle cap 60, the flowing water inlet 22 and the cross section of the flow path are sequentially arranged from the upstream side (the flowing water inlet 21 side). A contraction part 23 and a chamber 25 are provided.

  The running water introduction part 22 is provided between the running water introduction port 21 and the flow path cross-sectional contraction part 23, and the cross section of the flow path is gradually narrowed from the flowing water introduction port 21 toward the flow path cross-section contraction part 23. . The channel cross-section contraction portion 23 is located at the axial center of the nozzle body 40, and the channel cross-section is reduced with respect to the running water inlet 21 and the running water introduction portion 22.

  On the downstream side of the channel cross-section contraction portion 23, a channel cross-section rapid expansion portion 24 in which the channel cross-section is rapidly expanded (for example, three times or more rapidly expanded) with respect to the channel cross-section contraction portion 23 is provided at one end ( A chamber 25 is provided at the upstream end). The chamber 25 continues to the stepped hole 43 forming portion while maintaining the inner diameter dimension of the flow path cross-section suddenly enlarged portion 24. The inner wall surface of the chamber 25 extends substantially parallel to the axial center C of the nozzle body 40.

  At the bottom (upstream side end) of the stepped hole 43, a shield 27 and a support 50 for blocking a part of the flow path in the chamber 25 leading to the ejection port 26 are provided.

  2A is a cross-sectional view of the shielding body 27 and the support body 50, and FIG. 2B is a cross-sectional view taken along line AA in FIG. 2A.

  The shield 27 is formed in a disc shape, and the support 50 is formed in a ring shape so as to surround the outer peripheral surface of the shield 27. The shield 27 is supported with respect to the support 50 via, for example, three rod-shaped support portions 31 provided radially between the inner peripheral wall of the support 50. The three support portions 31 are provided around the outer peripheral surface of the shield 27 at equal intervals along the circumferential direction.

  As shown in FIG. 1, the support body 50 is fitted into the stepped hole 43 such that one end surface thereof is brought into contact with the annular bottom surface 44 of the stepped hole 43. In this state, the shield 27 faces the inside of the chamber 25 with its center aligned with the axial center C of the nozzle body 40.

  The shield 27 does not shield all the flow paths in the chamber 25, and a flow path 25 a that allows the flow of flowing water from the chamber 25 to the jet outlet 26 is between the shield 27 and the inner wall surface of the chamber 25. Is secured.

  Since the shield 27 receives the pressure (dynamic pressure) of pressurized bathtub water introduced from the flowing water inlet 21 and flowing through the chamber 25 to the outlet 26, it can withstand the pressure when only one support portion 31 is provided. There is a possibility that sufficient strength cannot be obtained and the shield 27 may come off. If only two support portions 31 are provided, the pressure acting on the surface of the shield 27 is non-axisymmetric with respect to the axis C. There is a possibility that the shield 27 rotates due to the influence of the moment around the support portion generated by the distribution. Therefore, it is desirable to provide three or more support portions 31.

  A nozzle cap 60 is screwed into the stepped hole 43 on the downstream side of the shield 27. The nozzle cap 60 has a cylindrical shape in which the ejection port 26 is formed on one end side, and a flange portion 51 is integrally provided outside the diameter of the ejection port 26. The other end (upstream end) of the nozzle cap 60 is brought into contact with the downstream end surface of the support body 50 of the shield 27, and the outer peripheral surface is screwed into the stepped hole 43. The hollow part of the nozzle cap 60 constitutes a part of the chamber 25, and the shield 27 is provided in the chamber 25 in the vicinity of the ejection port 26 and blocks a part of the flow path in the chamber 25 that leads to the ejection port 26. . The flange portion 51 of the nozzle cap 60 contacts an annular surface 45 formed on the downstream side of the stepped hole 43. The support body 50 of the shield body 27 is sandwiched between the bottom surface 44 of the stepped hole 43 and the nozzle cap 60, so that the shield body 27 is held in the chamber 25. The spout 26 faces the inside of the bathtub 1 and faces the other short side bathtub wall 4b. An inclined surface 28 that is inclined toward the axial center C of the nozzle body 40 is formed at the inner peripheral edge of the ejection port 26.

  Next, the operation of the jet bath device according to the embodiment of the present invention will be described.

  When a bather operates a switch of a controller (not shown) provided in the vicinity of the bathtub 1, the pump 7 is activated, and the bathtub water stored in the bathtub 1 is sucked into the circulation path 13 from the suction port 5. The sucked bathtub water is pressurized by the pump 7 and introduced into the flowing water inlet 21 of the jet nozzle 11 through the circulation path 14. The pressurized bathtub water introduced into the jet nozzle 11 is jetted into the bathtub 1 as a swirling jet whose jet direction is irregularly changed, as will be described below.

  FIGS. 5A to 5D are schematic diagrams for explaining how a swirling jet is formed by the jet nozzle 11.

  The pressurized bathtub water introduced from the flowing water inlet 21 flows in the form of a jet into the chamber 25 through the flowing water introducing portion 22, the channel cross-section contracting portion 23, and the channel cross-section suddenly expanding portion 24 in order. When the pressurized bathtub water flows into the chamber 25 from the flow path cross-section contracting portion 23, it becomes impossible to flow along the inner wall surface of the nozzle body 40 due to the rapid expansion of the flow path cross section, that is, against the inner wall surface of the flow path. Flow separation occurs.

  In general, the jet accelerates the external fluid by exchanging momentum with the external fluid, and is entrained inside the jet. At this time, if a wall surface exists in the vicinity of the jet, the jet itself is bent toward the wall surface by the reaction of the attractive force that acts to draw the external fluid into the interior, and the flow again follows the wall surface. That is, the flow reattaches to a part of the inner wall surface of the chamber 25 in the circumferential direction.

  The main stream adhering to the inner wall surface of the chamber 25 flows along the inner wall surface of the chamber 25 as it is, flows between the outer peripheral surface of the shield 27 and the inner wall surface of the chamber 25 toward the ejection port 26, and before the ejection port 26 (upstream side). ) And jets into the bathtub 1 from the jet outlet 26 as a jet that is inclined with respect to the axial center C along the inclined surface 28 formed so as to be inclined toward the axial center C of the nozzle body 40.

  As described above, a main flow (represented by a thick arrow a in FIG. 5A) is formed in the jet nozzle 11.

  The flow passage cross section of the jet outlet 26 is larger than the flow passage cross-section contraction portion 23, and the flow is decelerated downstream, that is, a reverse pressure gradient is formed in the chamber 25 where the static pressure increases downstream. Furthermore, since the shield 27 is provided in the chamber 25 so as to block a part of the flow path, a part of the main flow described above is not ejected from the ejection port 26, and the arrow b in FIG. As shown by the above, it is returned to the upstream side of the chamber 25.

  As shown in FIG. 5D, the flow returned to the upstream side flows into the stagnation region where the main flow is separated in the vicinity of the channel cross-section suddenly enlarged portion 24 as shown in FIG. 5C. Then, a swirling flow is formed around the central axis C in the vicinity of the channel cross-section suddenly enlarged portion 24, whereby the reattachment position with respect to the inner wall surface of the main flow changes irregularly in the circumferential direction, and the central axis C A jet swirling around is ejected.

  The bather can obtain a massage effect by receiving a swirling jet ejected from the jet nozzle 11 on a part of the body such as the waist, back, shoulders, hands, and feet. The jet ejected from the jet nozzle 11 is not a thin and strong linear jet, but a thick and soft swirling jet. You can get a massage that feels almost like a hand massage, and you can relax and relax even if you take a bath for a long time. In addition, when a strong straight jet is locally received, it tends to be in a tension state in order to maintain a posture to receive the jet at a desired site, but the swirling jet of this embodiment is soft over a wide range. In order to give a stimulus, it is easy to make the bather relaxed without putting tension on the bather.

  Since the jet ejected from the jet nozzle 11 according to the present embodiment is swirling, even if no bubbles are mixed in, a sense of stimulation sufficient to receive a massage feeling can be obtained. Since there is no mixing of bubbles, the sound generated by jets and the sound generated when bubbles are mixed can be reduced, making it more relaxing in a quiet environment. Of course, bubbles may be mixed into the swirling jet according to the present embodiment, and in that case, the swirling force of the jet is weaker than when bubbles are not mixed, and it is possible to receive a softer feeling of stimulation. Furthermore, it is possible to realize various stimulation feelings by switching whether or not bubbles are mixed or adjusting the amount of bubble mixing.

  Further, in the jet nozzle 11 according to the present embodiment, the fluid itself introduced into the jet nozzle 11 excites the swirling of the jet ejected from the jet outlet 26 by the reflux action in the chamber 25 as described above. Since it is configured, the rotating sliding part as in Patent Document 1 is unnecessary, the nozzle structure is simplified, it can be manufactured at low cost, and maintenance is facilitated. Furthermore, there is no fear of deterioration in turning performance due to wear or dirt clogging at the rotating sliding portion.

  As described above, the static pressure in the chamber 25 is lower than the static pressure of the bathtub water stored in the bathtub 1, and a reverse pressure gradient in which the static pressure increases toward the downstream side is formed inside the chamber 25. Even if the shield 27 is not provided, it is possible to form a reflux that returns a part of the main flow to the upstream side of the chamber 25. However, providing the shield 27 forms a more stable (increased reliability) reflux compared to the reflux formation due to the reverse static pressure gradient (the static pressure increases in the flow direction). The jet swirl is stable.

  Even if the inclined surface 28 is not provided in front (upstream side) of the ejection port 26, a deflected jet flow is realized because the main flow is biased to a part of the circumferential direction of the inner wall of the chamber 25 as described above. By providing the main flow along the inclined surface 28, deflection of the main flow can be promoted, and a wider swirling jet can be easily formed.

  In addition, by gradually narrowing the flow passage cross section of the flowing water introduction portion 22 from the flowing water introduction port 21 toward the flow passage cross-section contraction portion 23, pressure loss in the jet nozzle 11 is reduced, and a large pressure is applied during ejection. No need. That is, it is not necessary to make the pump 7 large, and the installation space and cost can be reduced.

  A shield 27 that shields most of the flow path in the nozzle in the vicinity of the ejection port 26 becomes an obstacle when the inside of the chamber 25 is cleaned. However, in this embodiment, the support body 50 that supports the shield body 27 is configured to hold the shield body 27 by being sandwiched between the nozzle body 40 and the nozzle cap 60, and is screwed to the nozzle body 40. By turning the nozzle cap 60 and removing the nozzle cap 60 from the nozzle body 40, the shield 27 can be removed from the nozzle body 40, and the cleanability in the chamber 25 is improved. Thereby, dirt, such as scale of hot water in the chamber 25, and bacteria can be removed, and a clean jet can be jetted into the bathtub.

  Hereinafter, other specific examples of the jet nozzle according to the embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same component as the jet nozzle 11 mentioned above, and the detailed description is abbreviate | omitted.

FIG. 6 is a schematic cross-sectional view showing a second specific example of the jet nozzle.
FIG. 7A is a cross-sectional view of the nozzle cap 73 in the jet nozzle of the second specific example, and FIG. 7B is a cross-sectional view taken along line BB in FIG. 7A.
FIG. 8 is a cross-sectional view of the shield 27 and its support 71 in the jet nozzle of the second specific example.

  The shield 27 is formed in a disc shape, and the support 71 is formed in a ring shape so as to surround the outer peripheral surface of the shield 27. On the outer peripheral surface of the support 71, there are provided three protrusions 72 provided at equal intervals in the circumferential direction and protruding outward in the diameter.

  In this specific example, the shield 27 can be attached to or detached from the nozzle body 40 together with the nozzle cap 73 while being held by the nozzle cap 73 together with the support 71.

  The nozzle cap 73 has a cylindrical shape in which the ejection port 26 is formed on one end side, and a flange portion 77 is integrally provided outside the diameter of the ejection port 26.

  As shown in FIGS. 7A and 7B, an annular groove 79 is formed in the inner wall surface of the nozzle portion 73 of the nozzle cap 73 on the jet outlet 26 side. Three cutout holes 74 communicating with the groove 79 are formed at equal intervals in the circumferential direction.

  The protrusion 72 provided on the outer peripheral surface of the support portion 71 of the shield 27 is made to coincide with the notch hole 74 of the nozzle cap 73, and the protrusion 72 is fitted into the groove 79 from the notch hole 74 to be supported. By rotating the body 71, the protrusion 72 is held in the groove 79, and as a result, the shield 27 and its support 71 are held in the cylindrical portion 32 of the nozzle cap 73, as shown in FIG. .

  The nozzle cap 73 is attached to the nozzle body 40 by screwing the outer peripheral surface of the cylindrical portion 32 into a stepped hole 75 formed at the downstream end of the nozzle body 40. The shield 27 faces the chamber 25 in the vicinity of the ejection port 26 and blocks a part of the flow path in the chamber 25 that leads to the ejection port 26. The flange portion 77 of the nozzle cap 73 abuts on an annular surface 76 formed on the downstream side of the stepped hole 75. The support 71 of the shield 27 is sandwiched between the chamber wall end surface 78 and the nozzle cap 73, and the shield 27 is held in the chamber 25.

  According to this example, the shield 27 can be attached to the nozzle body 40 together with the nozzle cap 73 after the shield 27 is held in advance with respect to the nozzle cap 73. It is less time-consuming than attaching 73 to the nozzle body 40 separately. Further, by turning the nozzle cap 73 screwed to the nozzle body 40 and removing the nozzle cap 73 from the nozzle body 40, the shield 27 can be removed from the nozzle body 40 together with the nozzle cap 73. Therefore, it is possible to reduce the labor required for removal. The support body 71 is rotated with respect to the nozzle cap 73 so that the protrusion 72 is aligned with the notch hole 74, and the protrusion 72 is removed from the notch hole 74 to the side opposite to the ejection port 26, thereby blocking the shield 27. And the support body 71 can be removed from the nozzle cap 73.

FIG. 9 is a schematic cross-sectional view illustrating a third specific example of the jet nozzle.
FIG. 10 is a schematic view of the nozzle cap 83 and the shield 27 in the jet nozzle of the third specific example as viewed from the upstream end face side.

  The shield 27 is held with respect to the nozzle cap 83 via, for example, three rod-like support portions 31 provided radially between the inner peripheral wall of the cylindrical portion 33 of the nozzle cap 83. The shield 27, the support part 31, and the nozzle cap 83 are integrally formed.

  The nozzle cap 83 has a cylindrical shape in which the ejection port 26 is formed on one end side, and a flange portion 87 is integrally provided outside the diameter of the ejection port 26.

  The nozzle cap 83 is attached to the nozzle body 40 by screwing the outer peripheral surface of the cylindrical portion 33 into a stepped hole 75 formed at the downstream end of the nozzle body 40. The shield 27 faces the chamber 25 in the vicinity of the ejection port 26 and blocks a part of the flow path in the chamber 25 that leads to the ejection port 26. The flange portion 87 of the nozzle cap 83 abuts on an annular surface 76 formed on the downstream side of the stepped hole 75.

  Also in this specific example, since the shield 27 can be attached to the nozzle main body 40 together with the nozzle cap 83, it takes less time than the case where the shield 27 and the nozzle cap 83 are separately attached to the nozzle main body 40. . Further, by turning the nozzle cap 83 screwed to the nozzle body 40 and removing the nozzle cap 83 from the nozzle body 40, the shield 27 integrated with the nozzle cap 83 can also be removed from the nozzle body 40. Therefore, it is possible to reduce the labor required for removal. By forming the nozzle cap 83 and the shield 27 integrally, it can be manufactured at low cost.

FIG. 11 is a schematic cross-sectional view illustrating a fourth specific example of a jet nozzle.
FIG. 12A is a cross-sectional view of the nozzle cap 90 in the jet nozzle of the fourth specific example and the shield 27 provided integrally therewith, and FIG. 12B is a cross-sectional view of C− in FIG. It is C sectional drawing.

  The nozzle cap 90 has a cylindrical shape in which the ejection port 26 is formed on one end side, and a flange portion 91 is integrally provided outside the diameter of the ejection port 26.

  On the outer peripheral surface of the cylindrical portion 33 of the nozzle cap 90, there are provided three protruding portions 95 provided at equal intervals in the circumferential direction and projecting radially outward.

  An annular groove is formed on the inner peripheral surface of the stepped hole 43 provided at the downstream end of the nozzle body 40, and, for example, three cutout holes 92 communicating with the groove are formed on the upstream side. It is formed at equal intervals in the direction.

  The protrusion 95 provided on the outer peripheral surface of the cylindrical portion 33 of the nozzle cap 90 is matched with the notch hole 92 formed on the inner peripheral surface of the stepped hole 43, and the protrusion 95 is inserted from the notch hole 92. The protrusion 95 is held in the groove by being fitted into the groove and rotating the nozzle cap 90, whereby the shield 27 and the nozzle cap 90 are held with respect to the nozzle body 40. The front end surface (upstream end surface) of the cylindrical portion 33 of the nozzle cap 90 is in contact with the annular bottom surface 44 of the stepped hole 43, and the flange portion 91 of the nozzle cap 90 is formed on the downstream side of the stepped hole 43. It contacts the annular surface 45.

  Also in this specific example, since the shield 27 can be attached to or detached from the nozzle main body 40 together with the nozzle cap 90, the shield 27 and the nozzle cap 90 are separately attached to or removed from the nozzle main body 40. It is less time-consuming than if you do. In addition, the nozzle cap 90 and the shield 27 can be formed at a low cost by forming them integrally.

FIG. 13 is a schematic cross-sectional view illustrating a fifth specific example of the jet nozzle.
FIG. 14 is a schematic view of the flange portion 46 provided on the radially outer side of the downstream end portion of the nozzle body 40 as viewed from the bathtub side in the jet nozzle of the fifth specific example.

  Since the flange portion 46 of the nozzle body 40 that is provided on the radially outer side of the spout 26 and faces the inside of the bathtub protrudes from the spout 26 to the inside of the bathtub, the bather is placed on the short-side bathtub wall 4a. Even if the user sits back, the back of the bather contacts the flange portion 46, and a gap is secured between the back of the bather and the spout 26, so that the spout 26 is not easily blocked by the back of the bather.

  Then, as in this specific example, if, for example, a spherical protrusion 105 is intermittently provided on the flange portion 46 along the circumferential direction, the flange portion 46 is projected to the back of the bather. Thus, the jet stream ejected from the ejection port 26 can be ejected into the bathtub through the gap between the projections 105 without being in close contact with each other.

FIG. 15 is a schematic cross-sectional view illustrating a sixth specific example of the jet nozzle.
FIG. 16 is a schematic view of the flange portion 46 provided on the radially outer side of the downstream end portion of the nozzle body 40 as viewed from the bathtub side in the jet nozzle of the sixth specific example.

  In this specific example, since the radial groove 107 is intermittently provided in the circumferential direction in the flange portion 46, the flange portion 46 is not completely adhered to the bather's back and is ejected from the ejection port 26. The jet can be ejected into the bathtub through the groove 107.

It is a schematic cross section of the jet nozzle in the jet bath device concerning the embodiment of the present invention. (A) is sectional drawing of the shielding body and support body of a jet nozzle shown in FIG. 1, (b) is AA sectional drawing in Fig.2 (a). It is a schematic diagram showing the schematic structure of the jet bath apparatus which concerns on embodiment of this invention. It is the schematic diagram which looked at the bathtub from the side surface direction in the same jet bath apparatus. It is a mimetic diagram for explaining signs that a swirl jet is formed in a jet nozzle in a jet bath device concerning an embodiment of the present invention. In the jet bath device concerning the embodiment of the present invention, it is a mimetic sectional view showing the 2nd example of a jet nozzle. (A) is sectional drawing of the nozzle cap in the jet nozzle of a 2nd example, (b) is BB sectional drawing in Fig.7 (a). It is sectional drawing of the shielding body and its support body in the jet nozzle of a 2nd specific example. In the jet bath apparatus concerning the embodiment of the present invention, it is a mimetic sectional view showing the 3rd example of a jet nozzle. It is the schematic diagram which looked at the nozzle cap and shield in the jet nozzle of the 3rd example from the end face side of the upstream side. In the jet bath apparatus concerning the embodiment of the present invention, it is a mimetic sectional view showing the 4th example of a jet nozzle. (A) is sectional drawing of the nozzle cap in the jet nozzle of a 4th example, and the shielding body integrally provided in this, (b) is CC sectional drawing in Fig.12 (a). In the jet bath apparatus concerning the embodiment of the present invention, it is a mimetic sectional view showing the 5th example of a jet nozzle. In the jet nozzle of a 5th example, it is the schematic diagram which looked at the flange part provided in the diameter outward side of the downstream edge part of a nozzle main body from the bathtub side. In the jet bath apparatus concerning the embodiment of the present invention, it is a mimetic sectional view showing the 6th example of a jet nozzle. In the jet nozzle of a 6th specific example, it is the schematic diagram which looked at the flange part provided in the diameter outward side of the downstream end part of a nozzle main body from the bathtub side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Bathtub, 5 ... Suction port, 11 ... Jet nozzle, 22 ... Flow water introduction part, 23 ... Channel cross-section contraction part, 24 ... Channel cross-section rapid expansion part, 25 ... Chamber, 26 ... Jet outlet, 27 ... Shield 40 ... Nozzle body, 60 ... Nozzle cap

Claims (3)

A bathtub,
A suction port that sucks in the bathtub water that is opened in the bathtub wall of the bathtub and stored in the bathtub;
A circulation path communicating with the suction port;
A pressurizing device that is provided in the middle of the circulation path and pressurizes and discharges the bath water sucked from the suction port;
A jet nozzle that jets pressurized bathtub water sent from the pressurizing device via the circulation path into the bathtub while changing the jetting direction;
With
The jet nozzle is
A flowing water introducing portion into which the pressurized bathtub water is introduced; a flow passage cross-sectional contracting portion that communicates with the flowing water introducing portion at a downstream side of the flowing water introducing portion and whose flow passage cross section is reduced with respect to the flowing water introducing portion; An upstream end of the channel cross-section rapidly expanding portion that is in communication with the channel cross-section contraction portion on the downstream side of the channel cross-section contraction portion, A nozzle body provided inside and held against the bathtub wall;
A nozzle cap that is detachably attached to the nozzle body, and has a spout that communicates with the chamber and faces the interior of the bathtub;
A shield that is provided facing the chamber in the vicinity of the spout and blocks a part of the flow path leading to the spout;
A jet bath apparatus characterized by comprising:   The jet bath apparatus according to claim 1, wherein the shield is detachably held with respect to the nozzle cap.   The jet bath apparatus according to claim 1, wherein the shield and the nozzle cap are integrally formed.

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