JP7499129B2 - Water discharge device - Google Patents

Description

This disclosure relates to a water discharge device.

Conventionally, there is known a water discharge device that includes a spray member and a support member that rotatably supports the spray member (see, for example, Patent Document 1). The water discharge device described in Patent Document 1 can change the size of the jet by positioning the rotation angle of the spray member at predetermined angles (see, for example, Patent Document 1).

JP 2019-130080 A

In the water discharge device described in Patent Document 1, the ejection member is not positioned in the rotational direction, and there is a possibility that the ejection member may rotate when ejecting a jet of water. Therefore, in a water discharge device having a configuration in which the size and angle of the jet of water varies depending on the rotational position of the ejection member, if the ejection member rotates, there is a possibility that a jet of a size and direction unintended by the user will be ejected from the ejection member.

The present disclosure aims to provide a water discharge device that can suppress rotation of the spray member during spraying.

The present disclosure relates to a water discharge device that includes an injection member having an injection port, and a support member that rotatably supports the injection member and has a supply flow path through which hot and cold water flows toward the injection member, the injection member having a pressure-receiving portion that receives the water pressure of the hot and cold water flowing through the supply flow path and a contact portion that contacts the support member, and the contact portion is pressed against the support member by the injection member being pressed by the water pressure of the hot and cold water received by the pressure-receiving portion.

1 is a perspective view showing a bathtub provided with a nozzle device of a first embodiment. FIG. FIG. 2 is a perspective view of the nozzle device according to the first embodiment. FIG. 2 is an exploded perspective view of the nozzle device as viewed from the front side. FIG. 2 is an exploded perspective view of the nozzle device as viewed from the rear side. 3 is a cross-sectional view taken along line AA in FIG. 2. 3 is a cross-sectional view taken along line BB in FIG. 2. FIG. 11 is a longitudinal sectional view of a nozzle device according to a second embodiment. FIG. 11 is a perspective view of an injection member of a nozzle device according to a second embodiment, as viewed from the rear side. FIG. 13 is a perspective view of an injection member according to a third embodiment. FIG. 13 is a perspective view of an injection member and a ring member according to a fourth embodiment.

The following describes the first embodiment of the nozzle device 3 installed in the bathtub device 100 with reference to the drawings. As shown in FIG. 1, the bathtub device 100 includes a bathtub 110 having an upper edge surface 120, a water discharge device 2 for shoulders and necks, two nozzle devices 3 (water discharge devices), a water intake port 130, and a drain port 140.

The bathtub 110 has a generally rectangular parallelepiped shape with an open top, and is designed to be able to store hot and cold water. The upper edge surface 120 is the part that extends outward from the top end of the bathtub 110 on all four sides. The upper edge surface 120 is formed to be generally flat.

The bathtub 110 has a bottom surface portion 111 and a side wall portion 112. The bottom surface portion 111 is formed in a substantially rectangular shape with curved corners. The side wall portion 112 extends upward from the bottom surface portion 111. The surface of the side wall portion 112 facing the inside of the bathtub 110 constitutes the side surface 150 of the bathtub 110. The side surface 150 inside the bathtub 110 is formed from a pair of short side surface portions 151 and a pair of long side surface portions 152. In this embodiment, the direction along the short side of the bathtub 110 is referred to as the short side direction D1, and the direction along the long side of the bathtub 110 is referred to as the long side direction D2.

The water discharge device 2 for the shoulders and neck is disposed on the upper edge surface 120 above one of the pair of short side surfaces 151, namely, the short side surface 151a. The water discharge device 2 for the shoulders and neck has a pillow portion 21 and a main body portion 22.

The pillow section 21 has a height that allows the user to rest his/her head on it, and is positioned so that it protrudes from the upper edge surface 120. The pillow section 21 has a horizontally elongated shape that is long in the width direction.

The main body 22 is provided on the upper edge surface 120 of the bathtub 110. The main body 22 is disposed below and inside the pillow portion 21. The main body 22 has a first water outlet 23 and a pair of second water outlets 24. The first water outlet 23 and the pair of second water outlets 24 are both provided on the upper edge surface 120 of the bathtub 110.

The first water outlet 23 is an outlet that discharges hot and cold water onto the shoulders of the user. The first water outlet 23 extends in a substantially straight line in the short side direction D1 of the bathtub 110, and is formed as a long and narrow slit that opens downward. The hot and cold water discharged from the first water outlet 23 is formed in the form of a thin film.

The pair of second water outlets 24 are openings formed at approximately the center of the longitudinal direction of the main body 22, spaced apart in the short side direction D1 of the bathtub 110. Each of the second water outlets 24 ejects a single wavy stream of water toward the user's neck.

The two nozzle devices 3 are arranged below one of the pair of short side surfaces 151a. The two nozzle devices 3 are formed at the same height. The two nozzle devices 3 are arranged apart in the short side direction D1, approximately in the center of the short side surface 151 of the bathtub 110 in the short side direction D1.

The water intake 130 is located below one of the long side surfaces 152a of the pair of long side surfaces 152. As shown in FIG. 2, the water intake 130 is located in the long side direction D2 of the bathtub 110, at a position about one-quarter of the length of the long side direction D2 of the bathtub 110 from one of the short side surfaces 151a.

The nozzle device 3 will now be described. As shown in Figures 1 and 2, the nozzle device 3 is attached to a mounting hole 112a (see Figure 5) formed in the side wall portion 112 of the bathtub 110. The nozzle device 3 is connected to a circulation pump (not shown) on the outside of the side wall portion 112. The nozzle device 3 sucks in hot water from within the bathtub 110 using the circulation pump, and sprays the hot water supplied by the circulation pump into the bathtub 110.

As shown in FIG. 2, the nozzle device 3 includes an injection member 5 having an injection outlet hole 511 (injection port), a fixed body 4 that rotatably supports the injection member 5 and is fixed to the bathtub 110, and a cover 6 that is attached to the tip side of the fixed body 4 so as to cover the injection member 5 fixed to the fixed body 4.

As shown in Figures 3 to 6, the fixed body 4 has an outer connecting member 41, an inner connecting member 42, and a support member 43. The fixed body 4 is fixed to a mounting hole 112a formed in the side wall portion 112.

The outer connecting member 41 is provided on the outside of the side wall portion 112 and, together with the inner connecting member 42 that is disposed through the mounting hole 112a of the side wall portion 112, sandwiches the side wall portion 112 to fix the nozzle device 3 to the bathtub 110.

As shown in Figures 5 and 6, the outer connecting member 41 has a body portion 411, a supply portion 412, a suction portion 413, and an internal tubular portion 414. The body portion 411 is formed in a cylindrical shape and has a flange 411a at one end on the side wall portion 112 side. A packing 411b is provided between the flange 411a and the side wall portion 112. A female thread that screws into the inner connecting member 42 is formed on the inner peripheral surface of the body portion 411.

An internal tubular portion 414 is formed coaxially inside the body portion 411. One end of the internal tubular portion 414 is open on the bathtub 110 side, and the other end is connected to the supply portion 412. The piping of the circulation pump is connected to the supply port 412a located at the end of the supply portion 412. Hot water is supplied from the circulation pump to the supply port 412a. A part of the hot water supply flow path 401 is formed inside the internal tubular portion 414.

An intake passage 402 is formed inside the body 411 and outside the internal tubular portion 414. The intake passage 402 is connected to the intake portion 413. The piping of a circulation pump is connected to the intake port 413a located at the end of the intake portion 413. Hot water is drawn in by the circulation pump from the intake port 413a. The internal tubular portion 414 is connected to the air intake portion 415. The air intake portion 415 is used to take in air when taking in external air and mixing air bubbles into the jet.

The inner connecting member 42 is formed in a cylindrical shape with both ends open. The inner connecting member 42 has a flange 421 formed at one end on the inside side of the bathtub 110. The inner connecting member 42 has a male thread formed on the outer peripheral surface of the other end, and the other end is screwed into the outer connecting member 41 while being inserted into a mounting hole 112a provided in the side wall portion 112. A gasket 422 for a watertight seal is sandwiched between the flange 421 and the side wall portion 112. A part of the suction flow path 402 is formed inside the inner connecting member 42 and outside the support member 43.

The outer edge portion 421a of the flange 421 engages with the cover 6 so that it is caught thereon. A protrusion 421b is formed slightly radially inward of the outer edge portion 421a of the flange 421, and stands toward the inside of the bathtub 110. The protrusion 421b is formed along the circumferential direction and supports the support member 43.

The support member 43 has a support member body 44 and a ring member 45. The support member 43 supports the injection member 5 at the tip side of the nozzle device 3 by sandwiching the outer end radial protrusion 512 formed at the radially outer end of the injection member 5 between the support member body 44 and the ring member 45.

The support member body 44 is formed in a cylindrical shape and fixed to the inner connecting member 42. As shown in Figures 5 and 6, the support member body 44 has a base end tubular portion 441, a first enlarged diameter portion 442, an intermediate tubular portion 443, a second enlarged diameter portion 444, a packing arrangement groove 445, a ring member arrangement surface 446, a flange portion 447, an annular tubular portion 448, and a communication portion 449. A part of the hot water supply flow path 401 that circulates hot water toward the injection member 5 is formed inside the base end tubular portion 441, the first enlarged diameter portion 442, and the intermediate tubular portion 443.

The base end tubular portion 441 is inserted into and connected to the internal tubular portion 414 of the fixed body 4. A part of the supply flow path 401 is formed inside the base end tubular portion 441. An annular gasket 441a is arranged on the outer periphery of the base end tubular portion 441, and the supply flow path 401 and the suction flow path 402 are sealed watertight so that they do not communicate with each other.

The first enlarged diameter portion 442 is connected to the tip of the base end tubular portion 441 and is formed in a cylindrical shape that expands in diameter and extends toward the inside of the bathtub 110. The intermediate tubular portion 443 is connected to the tip of the first enlarged diameter portion 442 and is formed in a cylindrical shape that extends with the same diameter toward the inside of the bathtub 110. The second enlarged diameter portion 444 is connected to the tip of the intermediate tubular portion 443 and is formed in a cylindrical shape that expands in diameter and extends toward the inside of the bathtub 110.

The packing arrangement groove 445 is disposed at the tip of the second enlarged diameter portion 444 and is formed in an annular groove shape that opens to the inside of the bathtub 110. A packing 445a is disposed in the packing arrangement groove 445. The outer end radial protrusion 512 of the injection member 5 is pressed against the packing 445a disposed in the packing arrangement groove 445 via a plate material 445b.

The ring member placement surface 446 is positioned radially outward of the packing placement groove 445 on the inner side of the bathtub 110 of the packing placement groove 445. The ring member placement surface 446 is formed in the shape of a circular ring surface facing the inner side of the bathtub 110. The ring member 45 is placed on the ring member placement surface 446.

The ring member 45 arranged on the ring member arrangement surface 446 is arranged such that the annular abutment surface 451 on the rear side of the width portion of the annular portion straddles the ring member arrangement surface 446 and the contact portion 512a on the tip side of the outer end radial protrusion 512 of the injection member 5. The annular abutment surface 451 contacts the contact portion 512a of the outer end radial protrusion 512 on the radial inside and abuts against the ring member arrangement surface 446 on the radial outside.

As a result, the injection member 5 is rotatably supported by the support member 43 with the outer end radial protrusion 512 sandwiched between the ring member 45 arranged on the ring member arrangement surface 446 and the packing 445a arranged in the packing arrangement groove 445.

The flange portion 447 extends radially outward from the end of the ring member placement surface 446 on the inner side of the bathtub 110. The annular tube portion 448 extends cylindrically from the outer periphery of the flange portion 447 toward the side wall portion 112. The end of the annular tube portion 448 on the side wall portion 112 side engages with the protrusion portion 421b of the flange 421 of the inner connecting member 42.

The annular tube portion 448 is provided with a plurality of communication portions 449 that penetrate radially. The communication portions 449 communicate with the suction port 621 (see Figures 3 and 4) of the cover 6 arranged on the exterior side. The communication portions 449 communicate with the intake passage 402 formed on the interior side. The intake passage 402 is provided inside the inner connecting member 42 and outside the support member main body 44.

The injection member 5 has a disk portion 51 formed at the tip side and a rear protrusion 52 protruding from the rear side of the disk portion 51. An injection outlet hole 511 (injection port) that opens to the inside of the bathtub 110 is formed in the center of the disk portion 51. An operation portion 53 is formed on the surface of the disk portion 51 on the inside of the bathtub 110. An outer end radial protrusion 512 supported by the support member 43 is formed on the radially outer end of the disk portion 51. A contact portion 512a is formed on the surface of the outer end radial protrusion 512 on the inside of the bathtub 110. The contact portion 512a contacts the support member 43. The contact portion 512a is pressed against the support member 43 by the injection member 5 being pressed by the water pressure of hot water received by the first wall portion 56 (described later).

The tip portion of the injection member 5 on the inside side of the bathtub 110 is covered by the cover 6. The operating part 53 of the injection member 5 is exposed inside the bathtub 110 from a central opening 611 of the cover 6. By rotating the operating part 53, the direction of the injection outlet hole 511 of the injection member 5 can be changed.

As shown in Figures 3 to 6, the cover 6 has a front annular plate portion 61, an outer tubular portion 62, and an engagement portion 63. The front annular plate portion 61 is formed in a circular ring shape having a predetermined width in the radial direction. A central opening 611 is formed in the center of the front annular plate portion 61. The operating portion 53 of the injection member 5 is exposed and positioned from the central opening 611.

The outer cylinder 62 extends from the radially outer end of the front annular plate 61 toward the side wall 112. The outer cylinder 62 is formed with multiple suction ports 621 that penetrate radially to suck in hot and cold water from within the bathtub 110. The engagement portion 63 (see FIG. 4) is formed in a claw shape at the end of the outer cylinder 62 on the side wall 112 side, and engages with the outer end of the flange 421 of the inner connecting member 42. This allows the cover 6 to be attached to the tip of the fixed body 4 that supports the injection member 5.

As shown in Figs. 5 and 6, the injection member 5 has an injection flow passage 55 for injecting a jet. The injection flow passage 55 connects the injection outlet hole 511 and the supply flow passage 401. The injection flow passage 55 has a pair of inlet flow passages 551 into which hot and cold water flows in from the supply flow passage 401, and a merging chamber 552 into which the hot and cold water flowing in from each of the pair of inlet flow passages 551 merge.

The injection member 5 has a first wall portion 56 (pressure receiving portion) that blocks the flow of hot water from the supply flow passage 401 and receives the water pressure of the hot water flowing through the supply flow passage 401, and a pair of second wall portions 57 that block part of the flow of hot water toward the downstream side in the merging chamber 552.

The first wall portion 56 is disposed downstream of the hot and cold water supply flow passage 401. The first wall portion 56 is formed at the rear end of the injection member 5. The first wall portion 56 is formed in a roughly U-shape that opens to the outside of the bathtub 110.

The first wall portion 56 has a receiving plate 561 extending in the radial direction of the injection member 5, and a pair of inclined plates 562 extending a predetermined length from both ends of the receiving plate 561 in a predetermined radial direction, inclining from the inner side to the outer side in the radial direction as they move toward the rear side. A pair of inlet flow paths 551 are formed on both outer sides of the first wall portion 56 in the predetermined radial direction.

The pair of second walls 57 are formed on the inside side of the bathtub 110 in the merging chamber 552. The pair of second walls 57 are sandwiched between the jet outlet hole 511 located in the radial center, and are positioned on the outside in a predetermined radial direction and extend in the radial direction. The hot and cold water that merges in the merging chamber 552 is sprayed to the outside from the jet outlet hole 511, with a portion of it being blocked by the pair of second walls 57.

The flow of hot and cold water supplied to the spray member 5 by the supply flow path 401 will be described. Hot and cold water flowing through the supply flow path 401 collides with the first wall portion 56 of the spray member 5. The first wall portion 56 (pressure receiving portion) receives part of the water pressure of the water flowing through the supply flow path 401. As a result, the first wall portion 56 is pressed against the inside of the bathtub 110, and the first wall portion 56 (pressure receiving portion) receives the water pressure, so that the spray member 5 is pressed against the inside of the bathtub 110.

Therefore, the contact portion 512a of the outer end radial protrusion 512 of the injection member 5 is pressed against and contacts the ring member 45, thereby suppressing the rotation of the injection member 5. As a result, the direction of the injection outlet hole 511 of the injection member 5 does not move, and the rotational movement of the injection member 5 is suppressed.

The hot water that collides with the first wall portion 56 branches into two directions and flows into a pair of inlet flow paths 551. The hot water that flows into the pair of inlet flow paths 551 flows into the junction chamber 552. The hot water that flows into the junction chamber 552 is sprayed from the jet outlet hole 511 on the bathtub 110 side of the junction chamber 552, with part of the flow of the hot water being blocked by the second wall portion 57.

In this embodiment, the hot water flowing into the pair of inlet flow paths 551 periodically switches between a strong flow of hot water flowing in from one of the pair of inlet flow paths 551, 551a, and a strong flow of hot water flowing in from the other of the pair of inlet flow paths 551, 551b, so that the jet of hot water sprayed from the spray outlet hole 511 becomes an oscillating spray that oscillates within a plane, as shown in FIG. 6.

As a result, the jet ejected from the ejection member 5 oscillates within a plane, and the orientation of the plane on which the jet oscillates varies depending on the rotational position of the ejection member 5. For this reason, a user may wish to change the orientation of the plane on which the jet oscillates. In this case, the user can freely change the orientation of the ejection outlet hole 511 by rotating the ejection member 5 with the operating unit 53.

The nozzle device 3 of this embodiment described above provides the following advantages:

The nozzle device 3 of this embodiment includes an injection member 5 having an injection outlet hole 511, and a support member 43 having a supply flow path 401 that rotatably supports the injection member 5 and flows hot water toward the injection member 5. The injection member 5 has a first wall portion 56 that receives the water pressure of the hot water flowing through the supply flow path 401, and a contact portion 512a that contacts the support member 43. The contact portion 512a is pressed against the support member 43 by the injection member 5 being pressed by the water pressure of the hot water received by the first wall portion 56. As a result, the contact portion 512a contacts the support member 43 in a state in which the injection member 5 is pressed by the water pressure of the hot water received by the first wall portion 56, so that the injection member 5 is less likely to move in the rotational direction during injection. Therefore, the rotation of the injection member 5 during injection can be suppressed.

A nozzle device 3A of the second embodiment will be described. The nozzle device 3A of the second embodiment differs from the first embodiment mainly in the configuration of the injection member 5A. The other configurations of the second embodiment are similar to those of the first embodiment. In explaining the configuration of the second embodiment, explanations of the same configurations as those of the first embodiment will be omitted.

As shown in FIG. 7, the injection member 5A of the second embodiment includes a guide portion 58 arranged upstream of the first wall portion 56 (pressure receiving portion). The guide portion 58 can guide hot water to the first wall portion 56. As shown in FIG. 8, the guide portion 58 has a pair of guide inclined portions 581 arranged radially apart on the upstream side of the first wall portion 56.

The pair of guide inclined portions 581 are arranged radially apart on the rear side of the first wall portion 56, leaving a space between them where the first wall portion 56 of the injection member 5A extends radially. The pair of guide inclined portions 581 are formed in an arcuate shape that inclines from the radially inner side to the radially outer side as it approaches the rear side. In other words, the pair of guide inclined portions 581 are formed in a shape in which the radially extending portion corresponding to the first wall portion 56 is cut out from a cone-shaped portion on the rear side of the first wall portion 56 that expands in diameter as it approaches the rear side.

According to the second embodiment, a guide section 58 is provided that is disposed upstream of the first wall section 56 (pressure receiving section). Therefore, the hot water guided by the guide section 58 applies water pressure to the first wall section 56 of the injection member 5A, so that the water pressure is more easily applied to the first wall section 56 than in the first embodiment, and the injection member 5A is less likely to move in the rotational direction during injection.

Next, the third embodiment will be described. The third embodiment differs from the first and second embodiments mainly in the configuration of the injection member 5B.

As shown in FIG. 9, the contact portion 512a of the outer end radial protrusion 512 of the injection member 5B of the third embodiment has an annular rib 513 having a smaller contact area than the contact area between the contact portion 512a of the outer end radial protrusion 512 of the first embodiment and the ring member 45. The annular rib 513 extends over the entire rotational range of the contact portion 512a of the outer end radial protrusion 512 of the injection member 5B.

According to the third embodiment, by providing the contact portion 512a with a circular rib 513, the contact area between the ring member 45 and the contact portion 512a can be reduced. This allows the frictional resistance of the rotation of the injection member 5 to be adjusted. Therefore, the force that rotates the injection member 5B can be adjusted.

Next, the fourth embodiment will be described. The fourth embodiment differs from the first to third embodiments mainly in the configuration of the injection member 5C and the ring member 45A.

As shown in FIG. 10, the contact portion 512a of the outer end radial protrusion 512 of the injection member 5C of the fourth embodiment has a plurality of protruding ribs 514 (convex portions) that are provided intermittently along the rotation direction of the injection member 5C. The annular abutment surface 451 of the ring member 45A has a plurality of recesses 452 that are provided intermittently along the rotation direction of the injection member 5C. The plurality of recesses 452 can be fitted into the plurality of protruding ribs 514 of the injection member 5C.

The contact portion 512a of the injection member 5C and the annular contact surface 451 of the ring member 45A are formed in annular shapes of the same diameter and are arranged so as to face and contact each other. The multiple protruding ribs 514 of the contact portion 512a of the injection member 5C and the multiple recesses 452 of the annular contact surface 451 of the ring member 45A are arranged at equal intervals.

As a result, when the injection member 5C is rotated, the multiple protruding ribs 514 of the contact portion 512a of the injection member 5C are alternately moved between a position where they fit into the multiple recesses 452 of the annular abutment surface 451 of the ring member 45A, and a position where they climb over the multiple recesses 452 of the annular abutment surface 451 of the ring member 45A.

According to the fourth embodiment, a plurality of protruding ribs 514 are provided on the contact portion 512a of the outer end radial protrusion 512 of the injection member 5C, and a plurality of recesses 452 are provided on the annular abutment surface 451 of the ring member 45A. As a result, by rotating the injection member 5C, the plurality of protruding ribs 514 of the injection member 5C and the plurality of recesses 452 of the ring member 45A can be moved to a position where they fit into each other and a position where they overcome each other. Therefore, when the injection member 5C is rotated, a clicking sensation can be obtained, and the injection member 5C can be easily stopped at a desired position in the rotation direction. By adjusting the spacing between the plurality of protruding ribs 514 and the spacing between the plurality of recesses 452, the ease of turning the injection member 5C can be adjusted.

The above describes a preferred embodiment of the present disclosure. The present disclosure is not limited to the above-described embodiment, and can be modified as appropriate.

For example, in the above embodiment, an example was described in which the configuration related to the spraying of the water discharge device was applied to the nozzle device 3. The configuration related to the spraying of the water discharge device is not limited to the above embodiment. The configuration related to the spraying of the water discharge device may also be applied to the second water discharge port 24 of the water discharge device for shoulders and necks 2.

In the third embodiment, the annular rib 513 is provided on the injection member 5B side. This is not limiting. The annular rib may be provided on the ring member 45 side.

In the fourth embodiment, a plurality of protruding ribs 514 are provided on the contact portion 512a of the outer end radial protrusion 512 of the injection member 5C, and a plurality of recesses 452 capable of fitting into the plurality of protruding ribs 514 are provided on the annular abutment surface 451 of the ring member 45A. This is not limited to the above. A plurality of recesses may be provided on the contact portion 512a of the outer end radial protrusion 512 of the injection member 5C, and a plurality of protruding ribs 514 may be provided on the annular abutment surface 451 of the ring member 45A. A plurality of protruding portions may be provided on either the contact portion 512a of the outer end radial protrusion 512 of the injection member 5C or the annular abutment surface 451 of the ring member 45A, or a plurality of recesses may be provided on either one of them.

3 Nozzle device (water discharge device), 5 Spray member, 43 Support member, 55 Spray flow path, 56 First wall portion (pressure receiving portion), 58 Guidance portion, 401 Supply flow path, 511 Spray outlet hole (spray port), 512a Contact portion, 513 Annular rib (Annular rib), 514 Protruding rib (Convex portion), 452 Concave portion

Claims (5)

An injection member having an injection port;
a support member that rotatably supports the injection member and has a supply flow path that flows hot and cold water toward the injection member;
The injection member has a pressure receiving portion that receives the water pressure of the hot and cold water flowing through the supply flow path and a contact portion that contacts the support member,
The pressure receiving portion is formed in a U-shape in cross section with the supply flow path side open,
The contact portion is pressed against the support member when the injection member is pressed by the water pressure of hot and cold water received by the pressure-receiving portion. An injection member having an injection port;
a support member that rotatably supports the injection member and has a supply flow path that flows hot and cold water toward the injection member;
The injection member has a pressure receiving portion that receives the water pressure of the hot and cold water flowing through the supply flow path and a contact portion that contacts the support member,
The contact portion is pressed against the support member by the water pressure of the hot and cold water received by the pressure receiving portion , and
A water discharge device , wherein either the contact portion or the portion of the support member that contacts the contact portion has a circular rib extending in the rotational direction of the spray member . An injection member having an injection port;
a support member that rotatably supports the injection member and has a supply flow path that flows hot and cold water toward the injection member;
The injection member has a pressure receiving portion that receives the water pressure of the hot and cold water flowing through the supply flow path and a contact portion that contacts the support member,
The contact portion is pressed against the support member by the water pressure of the hot and cold water received by the pressure receiving portion , and
A water discharge device, wherein either the contact portion or the portion of the support member that contacts the contact portion has a plurality of protrusions that are intermittently provided along the rotation direction of the ejection member. An injection member having an injection port;
a support member that rotatably supports the injection member and has a supply flow path that flows hot and cold water toward the injection member;
The injection member has a pressure receiving portion that receives the water pressure of the hot and cold water flowing through the supply flow path and a contact portion that contacts the support member,
The contact portion is pressed against the support member by the water pressure of the hot and cold water received by the pressure receiving portion , and
A water discharge device, wherein either the contact portion or the portion of the support member that contacts the contact portion has a plurality of recesses that are intermittently provided along the rotation direction of the ejection member. The water discharge device according to claim 1 , wherein the ejection member has a guide portion that is disposed upstream of the pressure receiving portion and guides hot and cold water to the pressure receiving portion.

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