JP2020041572A - Hot/cold water mixing faucet - Google Patents

Abstract

To provide a hot/cold water mixing faucet device in which a length of a housing in an axial direction is reduced, the housing is small-sized and a first discharge port and a second discharge port are disposed in a central part of the housing, the hot/cold water mixing faucet device including a resin housing.SOLUTION: A hot/cold water mixing faucet comprises: a switching mechanism 20 which performs switching of discharge ports for discharging mixed hot/cold water from a hot/cold water mixing mechanism via any one discharge port of a first discharge port 4 and a second discharge port 5; and a discharge channel forming member 30 in which first and second channels 32 and 33 for supplying the mixed hot/cold water from the switching mechanism 20 to the first discharge port 4 and the second discharge port 5 are formed and which is accommodated in a housing. In the discharge channel forming member 30, a first channel 4 and a second channel 5 are formed concentrically, inlets of the first and second channels communicate with the switching mechanism 30, and outlets of the first and second channels 32 and 33 communicate with the first discharge port 4 and the second discharge port 5 of a resin cylindrical housing H.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a hot water mixer tap, and more particularly to a hot water mixer tap having a resin housing.

  Description of the Related Art Conventionally, hot water mixer taps are widely used in showers, bathtubs, sanitary equipment for wash basins, and the like, as a means for mixing hot water and water to generate mixed hot water at a predetermined temperature set by a user. I have.

As a general hot water mixing tap, a thermo cartridge provided with a hot water mixing mechanism for changing the hot water mixing temperature by adjusting the hot water mixing ratio, and discharging the hot water mixed at a predetermined temperature by the thermo cartridge. There is known a hot and cold water mixing tap device provided with a switching mechanism for switching between a callan discharge port and a shower discharge port.
The hot water mixing mechanism and the switching mechanism are housed inside a metal housing, and one end of the metal housing is provided with a temperature adjusting lever (dial) for adjusting the temperature of the hot water mixing mechanism. At the end, a switching lever (dial) of a switching mechanism for switching between a curan discharge port and a shower discharge port is provided.

  In the hot water mixing tap device thus configured, the temperature of the mixed hot water to be discharged is set to a predetermined temperature by a temperature adjusting lever (dial), and the callan discharge port and the shower are set by a switching lever (dial). By selecting any one of the outlets, the user can obtain mixed water at a predetermined temperature from a desired outlet.

  By the way, since a general hot-water mixer tap has a metal housing, the cost increases, and a hot-water mixer tap having a resin housing is desired. A hot and cold water mixing tap having the same has been proposed.

  A hot water mixer tap device disclosed in Patent Document 1 will be described with reference to FIG. As shown in FIG. 10, the housing 51 of the hot and cold water mixing tap device 50 is constituted by a double housing of a resin inner housing 52 and a resin outer housing 53. The switching mechanism 55 is housed. Further, the hot and cold water mixing mechanism 54 and the switching mechanism 55 are disposed separately, and a space S is provided therebetween.

  Further, between the inner housing 52 made of resin and the outer housing 53 made of resin, other than the hot water side passage 58 and the water side passage 59 extending from the hot water side and water side supply pipes 56, 57 to the hot water mixing mechanism 54. A mixed hot and cold water passage 61 is provided from the switching mechanism 55 to the callan discharge port 60. Further, a mixed hot and cold water passage 63 is provided from the switching mechanism 55 to the shower discharge port 62.

Japanese Patent No. 2827806

  By the way, in the hot and cold water mixing tap device shown in Patent Document 1, as described above, the resin inner housing and the resin outer housing are required, so that the number of parts increases and the cost increases. There were technical challenges.

Further, in the hot and cold water mixing tap device disclosed in Patent Literature 1, between the inner housing made of resin and the outer housing made of resin, a passage of mixed hot and cold water from the switching mechanism to the curan discharge port and the shower discharge port is provided. Is provided. For this reason, the callan discharge port and the shower outlet are arranged at positions shifted from each other in the axial direction of the mixer tap device.
As a result, there is a technical problem that the housing of the hot and cold water mixing tap device becomes longer in the axial direction, and the housing becomes larger.

  In addition, since the hot and cold water mixing mechanism and the switching mechanism are arranged apart from each other and a space is provided between them, the housing becomes longer in the axial direction, which is a factor of increasing the size of the housing.

  Furthermore, since the callan discharge port and the shower discharge port are arranged on the switching mechanism side from the center of the housing, an external force acting on the callan discharge port and the shower discharge port during use (an external force applied to the callan pipe and the shower hose by the user) ) Acts on one side of the housing, and the connection between the water supply port and the water-side supply pipe and the housing near the connection may be damaged.

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have found that a hot / water mixer tap device having a resin housing does not use a double housing, reduces the axial length of the housing, and further supplies hot water. The research was conducted on the premise that a curan discharge port and a shower discharge port were formed between the mouth and the water supply port.
Then, the present inventors newly conceived a discharge flow path forming member as a mixed hot water path from the switching mechanism to the callan discharge port and the shower discharge port, and the above-described problem can be solved by the discharge flow path forming member. To complete the present invention.

  The present invention has been made under the above circumstances, and an object of the present invention is to provide a water / water mixer tap device having a resin housing, in which the axial length of the housing is short and the housing is downsized. It is another object of the present invention to provide a hot and cold water mixing tap device in which a callan discharge port and a shower discharge port are arranged in a central portion of a housing.

  A hot and cold water mixing tap according to the present invention for solving the above-mentioned problems is provided with a resin-made cylindrical housing having a hot water supply port, a water supply port, a first discharge port, and a second discharge port, and hot water supplied from the hot water supply port. Hot water and water supplied from the water supply port are mixed to form a mixed hot and cold water at a predetermined temperature; a hot and cold mixing mechanism housed in a housing; and a mixed hot and cold water at a predetermined temperature from the hot water mixing mechanism, A switching mechanism housed in a housing for switching the discharge port for discharging from one of the discharge port and the second discharge port, and a first discharge port for the mixed hot and cold water from the switching mechanism. A hot-water mixer tap including at least an outlet and a discharge channel forming member housed in a housing, the first and second channels for supplying to the second discharge port being formed; The flow path forming member is configured such that the first flow path and the second flow path are the same. The inlets of the first and second flow paths are formed in a circular shape and communicate with the switching mechanism, respectively, and the outlets of the first and second flow paths are connected to a first discharge port of a resin-made cylindrical housing. And the second discharge port communicates with the discharge port.

The hot and cold water mixing tap according to the present invention includes a discharge flow path forming member in a housing, and a discharge flow path forming member for supplying mixed hot and cold water to each of the first discharge port and the second discharge port. The first flow path and the second flow path are formed concentrically, and the inlet of the flow path communicates with the switching valve mechanism, and the outlet of the flow path is the first discharge port of the resin-made cylindrical housing. The second discharge port is in communication with each of the discharge ports. That is, the mixed hot and cold water discharged from the switching valve mechanism passes through the first flow path and the second flow path which are concentrically arranged, and the first discharge port and the second discharge port of the cylindrical housing are formed. It is configured to discharge from the discharge port.
Thus, since the first flow path and the second flow path are formed concentrically, the length of the resin housing in the axial direction can be shortened, and the housing can be downsized.

  Here, the switching mechanism is configured such that mixed hot and cold water of a predetermined temperature from the hot and cold water mixing mechanism is supplied to the inside, and the switching mechanism is rotated by a switching operation. First and second through holes provided at different positions in the direction, a switching valve housing for accommodating the switching valve, and formed in the switching valve housing at different positions in the axial direction and in different radial directions. The first and second through-holes are provided, and when the first through-hole of the switching valve coincides with the first through-hole of the switching valve housing by rotating the switching valve, the switching is performed. The first through hole of the valve communicates with the inlet of the first flow path of the discharge flow path forming member, and the outlet of the first flow path is connected to the first discharge port of the cylindrical housing made of resin. A second through hole of the switching valve and a switching valve housing; When the two through-holes coincide, the second through-hole of the switching valve communicates with the inlet of the second flow path of the discharge flow path forming member, and the outlet of the second flow path is formed of a resin cylinder. The mixed hot and cold water supplied from the hot and cold water mixing mechanism is communicated with the second discharge port of the tubular housing through the bottomed cylindrical switching valve to the first discharge port or the second discharge port of the resinous cylindrical housing. It is desirable to supply to the discharge port.

  Further, the discharge flow path forming member is formed inside the first peripheral wall so as to be concentric with the first peripheral wall having a cylindrical shape and the first peripheral wall, and is disposed in the axial direction from the first peripheral wall. A second peripheral wall having a shorter length, and a third peripheral wall formed concentrically with the second peripheral wall inside the second peripheral wall and having a shorter axial length than the second peripheral wall. A first bottom wall formed at the bottom of the first peripheral wall and the second peripheral wall, and a second bottom wall formed at the bottom of the second peripheral wall and the third peripheral wall. A first flow path formed between the first peripheral wall, the second peripheral wall, and the first bottom wall; and a second flow path formed between the second peripheral wall, the third peripheral wall, and the second bottom wall. And a second flow path formed between the first and second through-holes formed in the switching valve housing. The first flow path and the second flow path communicate with each other. Desirably New

  Further, the discharge flow path forming member has a third bottom wall formed inside the third peripheral wall, a communication hole formed in the third bottom wall, and an opposite to the third peripheral wall. An inner peripheral surface of the resin-made cylindrical housing, comprising: a mixing chamber forming wall portion forming a mixing chamber extending in a direction; and a water inlet formed at a tip end of the mixing chamber forming wall portion. A water inflow path is formed between the water and the outer peripheral surface of the cylindrical first peripheral wall, and water supplied from a water supply port flows into the mixing chamber through the water inflow path and the water inflow port, and is mixed with hot water. Preferably, the mixed hot and cold water is supplied to the inside of the switching valve via the communication hole in the third bottom wall.

  As described above, since the water flow inlet and the mixing chamber forming wall are formed in the discharge flow path forming member, the mixing tap mechanism and the switching mechanism can be arranged without providing a gap in the axial direction of the housing. . As a result, the length of the resin housing in the axial direction can be reduced, and the size of the housing can be reduced.

In particular, the control valve is configured such that the hot and cold water mixing mechanism has one end in contact with a third bottom wall of the discharge flow path forming member, and an actuator that expands and contracts in response to a change in temperature by the mixed hot and cold water, and the other end of the actuator is in contact with the other end. And a body, and the actuator is preferably housed in a mixing chamber formed by the mixing chamber forming wall.
With this configuration, the length of the resin housing in the axial direction can be further reduced, and the housing can be downsized.

Further, the first and second discharge ports may be arranged at the center of the hot water supply port and the water supply port in the axial direction of the housing and at different positions in the axial direction.
With this configuration, the length of the housing in the axial direction can be reduced, and the housing can be downsized. In addition, since the first discharge port and the second discharge port can be arranged at the center of the housing, an external force acting on the first discharge port and the second discharge port during use (when the user uses , The force exerted by the external force applied to the shower hose) acts evenly on the hot water supply port and the water supply port, and there is no bias in the operation, so that damage to the hot water supply port connection part, the water supply port connection part, and the like can be suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, it is a hot-water mixer tap apparatus which has a housing made of resin, a housing is short in an axial direction, a housing can be miniaturized, and a 1st discharge port and a 2nd discharge port are in the center part of a housing. The arranged hot and cold mixing tap device can be obtained.

FIG. 1 is a front view of an embodiment according to the present invention. FIG. 2 is a bottom view of the embodiment according to the present invention. FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a sectional view taken along line BB of FIG. 5A and 5B are diagrams illustrating a flow path forming member used in the embodiment, wherein FIG. 5A is a front view and FIG. 5B is a bottom view. 6A and 6B are cross-sectional views illustrating a flow path forming member used in the embodiment, in which FIG. 6A is a cross-sectional view taken along a line CC, and FIG. FIG. 7 is a schematic perspective view illustrating a main part of a switching valve used in the embodiment. FIG. 8 is a perspective view showing a switching valve housing used in the embodiment. FIG. 9 is a schematic perspective view for explaining a state in which the switching valve is housed in the switching valve housing. FIG. 10 is a sectional view showing a conventional hot and cold water mixing tap.

Hereinafter, a hot water mixer tap according to an embodiment of the present invention will be described with reference to FIGS. 1 to 9.
1 and 2 show the overall shape of the hot and cold water mixing faucet 1. As shown in FIGS. 1 and 2, a hot water mixing faucet 1 includes a hot water supply port 2 to which a hot water supply pipe (not shown) for supplying hot water is connected, and a water supply pipe (not shown) for supplying water. A water supply port 3 to be connected is provided.
The hot-water mixing faucet 1 is provided with a first discharge port 4 for supplying mixed hot water to a discharge pipe (not shown) of the caran, a shower hose, and the like, and supplies the mixed hot-water to the shower. And a second discharge port 5.

The hot water supply port 2 and the water supply port 3 are provided on the back side of the substantially cylindrical housing H, the first discharge port 4 is provided on the lower surface side of the substantially cylindrical housing 4, and the second discharge port 5 It is provided on the back side of the housing H.
Further, the first and second discharge ports 4 and 5 are arranged at the center position of the hot water supply port 2 and the water supply port 3 in the axial direction of the housing H and at different positions in the radial direction.
As shown in FIG. 2, the different positions in the radial direction are such that the first and second discharge ports 4 and 5 are arranged at positions shifted by, for example, 90 degrees around the axis of the housing H in the circumferential direction. That means.

The housing H is made of resin, and is a resin having heat resistance, for example, PPS (polyphenylene sulfide) resin, PSF (polysulfone) resin, or the like.
The housing H having the hot water supply port 2, the water supply port 3, the first discharge port 4, and the second discharge port 5 is formed by molding.

As described above, the first and second discharge ports 4 and 5 are arranged at the center position of the hot water supply port 2 and the water supply port 3 in the axial direction of the housing H and at different positions in the radial direction.
Therefore, during use, an external force acting on the first and second discharge ports 4 and 5 (force exerted by an external force applied to the curan pipe and the shower hose by the user) is applied to a hot water supply pipe (not shown) supporting the housing. ) And the connection between the water supply port 2 and the connection between the water supply pipe (not shown) and the water supply port 3.
As a result, damage to the housing H at or near the hot water supply port 2 of the resin housing H, or at or near the water supply port 3 can be suppressed.

  Although not shown, a temperature adjusting dial (lever) for rotating the rotating shaft 11 is provided outside the rotating shaft 11 for operating the hot and cold water mixing mechanism 10. Similarly, a switching dial (lever) for rotating the rotating shaft 21 is provided outside the rotating shaft 21 for operating the switching mechanism 20.

Next, the hot and cold water mixing mechanism 10 will be described with reference to FIGS.
The hot and cold water mixing mechanism 10 has a casing 12 that rotatably supports the rotating shaft 11. The casing 12 is made of resin, and is formed by molding using a resin having heat resistance, for example, PPS (polyphenylene sulfide) resin, PSF (polysulfone) resin, or the like.

As shown in FIG. 3, the casing 12 is formed in a cylindrical shape with a bottom as a whole, and a cylindrical wall at a tip end portion of the casing 12 communicates with the hot water supply port 2 so that hot water flows into the casing 12. A hot water inlet A is formed.
A water inlet B into which water from the water inlet 3 flows is provided in parallel with the hot water inlet A at the distal end of the casing 12 in the axial direction. The water inlet B is provided at the tip of the discharge channel forming member 30.

A hot water valve seat 12 a is provided at a distal end of the casing 12, and a water valve seat 31 is provided at a distal end 30 a of the discharge flow path forming member 30. A hot water valve 14b and a water valve 14c are provided on a valve element 14a of the control valve element 14, which will be described later.
The O-ring 6 is in contact with a valve element 14a of the control valve element 14, which will be described later, and separates the hot water inlet A from the water inlet B even when the valve element 14a moves, so that the hot water and the water do not mix. Has been made.

A part of the urging body 16 is accommodated inside the control valve body 14, and one end of the urging body 16 is disposed in contact with the inner surface of the bottom 14 d of the control valve body 14.
One end of the actuator 17 is disposed in contact with the outer surface of the bottom 14d of the control valve body 14.
As shown in FIG. 3, the actuator 17 is in contact with and supported by a third bottom wall 41 formed on the discharge flow path forming member 30 and an outer surface of the bottom 14 c of the control valve element 14.

  Note that the control valve element 14 is formed by molding a resin having heat resistance, for example, a PPS (polyphenylene sulfide) resin, a PSF (polysulfone) resin, or the like.

Further, the hot and cold water mixing mechanism 10 includes an adjusting screw shaft 15. The adjusting screw shaft 15 is screwed with the rotating shaft 11, moves forward and backward according to the rotating operation of the rotating shaft 11, and adjusts the axial position of the control valve body 14.
The adjusting screw shaft 15 is configured to be movable in the axial direction of the casing 12 without rotating to the casing 12. A screw portion 15 a is formed on the adjusting screw shaft 15 and is screwed with the screw portion 11 a of the rotating shaft 11.

  As a result, by rotating the temperature adjusting dial, the screw portion 11a of the rotating shaft 11 rotates, the adjusting screw shaft 15 slides in the axial direction, and the control valve body 14 moves via the biasing body 16. . That is, the user can set and change the position of the control valve element 14 by operating the temperature adjustment dial so that the mixed water having a desired temperature is discharged.

The biasing body 16 is formed of a material having a constant spring constant. As the urging member 16, for example, a coil spring made of stainless steel can be used.
Further, the actuator 17 performs an expansion / contraction operation according to a temperature change. Examples of the actuator 17 include a spring made of a shape memory alloy (SMA) and a wax element made of a material whose spring constant changes according to the temperature.

The control valve element 14 can slide the control valve element 16 toward the water valve seat 30a by receiving the repulsive force of the urging element 16, and can also control the control valve element 14 by receiving the repulsive force of the actuator 17. It can slide to the hot water valve seat 12a side.
That is, the control valve element 14 adjusts the distance between the hot water valve 14b and the hot water valve seat 12a and the distance between the water valve 14c and the water valve seat 31 based on the balance of the loads received from the urging element 16 and the actuator 17. . With this configuration, the mixing ratio of the hot water flowing from the hot water inlet A and the water flowing from the hot water inlet B in the hot water mixing tap 1 is adjusted.

  A mixing chamber C is formed from the inside of the hot water inlet A and the water inlet B of the casing 1 toward the switching mechanism 20. The mixing chamber C is formed by the discharge channel forming member 30.

Next, the discharge channel forming member 30 will be described with reference to FIGS.
The discharge flow path forming member 30 is configured such that a first flow path 32 and a second flow path 33 for supplying mixed hot water to the first discharge port 4 and the second discharge port 5, respectively, are concentric. Is formed.
As shown in FIG. 4, the inlets of the first and second flow paths 32 and 33 communicate with through holes h1 and h2 formed in the switching valve housing h, respectively. Are configured to communicate with the first discharge port 4 and the second discharge port 5 of the cylindrical housing H made of resin.

Specifically, as shown in FIGS. 5 and 6, the discharge flow path forming member 30 is formed inside the first peripheral wall 36 concentrically with the cylindrical first peripheral wall 36 and A second peripheral wall 37 having a shorter axial length than the first peripheral wall 36 is formed.
A first bottom wall 38 is formed at the bottom of the first peripheral wall 36 and the second peripheral wall 37.

Further, a third peripheral wall 39 which is formed concentrically with the second peripheral wall 37 and is formed inside the second peripheral wall 37 and has a shorter axial length than the second peripheral wall 37 is formed.
A second bottom wall 40 is formed at the bottom of the second peripheral wall 37 and the third peripheral wall 39.

In addition, a third bottom wall portion 41 is formed inside the third peripheral wall 39 in the discharge flow path forming member 30, and a communication hole 41a is formed in the third bottom surface portion 41.
Further, a mixing chamber forming wall portion 42 that forms a mixing chamber extends in the third bottom surface portion 41 in a direction opposite to the first to third peripheral walls 36, 37, and 39.
The third bottom surface portion 41 and the mixing chamber forming wall portion 42 form a bottomed cylindrical mixing chamber C for mixing hot and cold water.

A water inlet B and a water valve seat 31 are provided at the tip of the mixing chamber forming wall 30. The end of the actuator 17 is in contact with the third bottom surface 41 and is locked.
A guide hole 41b is provided in the center of the third bottom surface portion 41 to guide the shaft portion 14e of the control valve body 14 so as to be movable.

Then, as shown in FIGS. 3 and 4, the end of the first peripheral wall 36 and the first flange h3 of the switching valve housing h are brought into close contact with each other via the O-ring 7a, and the end of the second peripheral wall 37 is formed. And the second flange part h4 of the switching valve housing h and the O-ring 7b.
Thus, the first flow path 32 is formed between the first peripheral wall 36, the second peripheral wall 37, the first bottom wall 38, and the switching valve housing h.

  Further, the end of the third peripheral wall 39 and the third flange portion h5 of the switching valve housing h are brought into close contact with each other via the O-ring 7c, so that the second peripheral wall 37, the third peripheral wall 39, and the second A second flow path 33 is formed between the bottom wall portion 40 of the second valve and the switching valve housing h.

As shown in FIG. 4, a first through hole h1 corresponding to the first flow path 32 and a second through hole h2 corresponding to the second flow path 33 are formed in the switching valve housing h. One end of the first flow path 32 and one end (inlet) of the second flow path 33 are formed so as to communicate with the through holes h1 and h2 of the switching valve housing h.
The other end of the first flow path 32 (first flow path outlet 34) communicates with the first discharge port 4, and the other end of the second flow path 33 (second flow path outlet). 35) is configured to communicate with the second discharge port 5.
As a result, the first through hole h1 of the switching valve housing h communicates with the first discharge port 4 via the first flow path 32, and the second through hole h2 communicates with the second flow hole h2. It communicates with the first discharge port 4 via the passage 33.

One end of the housing H is closed by a lid h6 of the switching valve housing via an O-ring 7d. Further, a water inflow path D is formed between the inner peripheral surface of the resin-made cylindrical housing H and the outer peripheral surface of the cylindrical first peripheral wall 36, and water supplied from the water supply port 3 is It is configured to flow into the mixing chamber C through the water inlet B.
Then, the hot water supplied from the hot water supply port 2 and supplied through the hot water inlet A and the water supplied through the water inlet B are mixed in the mixing chamber C, and further, the third bottom wall portion 41 The mixed hot and cold water is supplied into the switching valve 22 through the communication hole 41a.

Next, the switching mechanism 20 will be described based on FIG. 3, FIG. 4, FIG. 7 to FIG.
As shown in FIGS. 3 and 4, the switching mechanism 20 includes a bottomed cylindrical switching valve 22 mounted on a rotating shaft 21 which is rotated by a switching operation of a user.
As shown in FIG. 7, the switching valve 22 is provided with a first through hole 22a and a second through hole 22b in the axial direction of the peripheral surface. Each of the first through hole 22a and the second through hole 22b is provided with two through holes.

On the other hand, in the switching valve housing h in which the switching valve 22 is housed, as shown in FIG. 8, through holes h1 and h2 are formed at different positions in the axial direction and in different radial directions. The through holes h1, h2, the first through hole 22a, and the second through hole 22b are formed at corresponding positions (heights).
FIG. 8 is a diagram showing a main portion of the switching valve housing h, and does not show a flange portion and the like.

  As shown in FIGS. 3 and 4, the switching valve 22 is housed in a switching valve housing h via a cylindrical collar 23. The cylindrical collar 23 aims to improve the rotational sliding property of the switching valve 22, and the collar 23 also has through holes formed at the same positions as the through holes h1 and h2 of the switching valve housing h. ing.

  Since the switching mechanism 20 is configured in this manner, as shown in FIG. 9, by rotating the rotating shaft 21, the switching valve 22 rotates, and the first through hole 22 a of the switching valve 22 When the first through hole h1 coincides with the first through hole h1, the through hole 22a and the first through hole h1 communicate with each other, and the hot and cold water is supplied to the first flow path 32. At this time, the second through hole 22b of the switching valve 22 and the second through hole h2 of the housing H do not match (not communicate with each other), so that the hot and cold water is supplied to the second flow path 33. Never.

  Further, when the switching valve 22 rotates and the second through hole 22b of the switching valve 22 matches the second through hole h2 of the housing H, the through hole 22b and the second through hole h2 communicate with each other, and The hot and cold water mixture is supplied to the second flow path 33. At this time, the first through hole 22a of the switching valve 22 and the first through hole h1 of the housing H do not match (not communicate with each other), so that the mixed water is supplied to the first flow path 32. Never.

The operation of the hot and cold water mixing faucet will be described.
First, the tapping temperature is set by adjusting the amount of urging of the urging body 16 with a temperature adjusting handle (not shown). Thereafter, similarly to the conventional hot and cold water mixing tap, the opening degree of the hot water inlet A and the hot water inlet B is adjusted by the control valve body 14 by the actuator 17 and the urging body 16, and the outlet temperature is adjusted.

Here, the hot water flows into the mixing chamber C through the hot water supply port 2 and the hot water inlet A (between the hot water valve 14b and the hot water valve seat 12a). On the other hand, the water flows into the mixing chamber C through the water supply port 3, the water inflow path D, and the water inflow port B (between the water valve 14c and the water valve seat 31).
The mixed hot and cold water mixed in the mixing chamber C flows into the switching valve 22 from the communication hole 41 a of the third bottom wall portion 41.

Next, the user rotates the rotating shaft 21 to select the first and second discharge ports.
When the first through hole 22a of the switching valve 22 coincides with the first through hole h1 of the housing H, the through hole 22a and the first through hole h1 communicate with each other, and the hot and cold water mixes with the through hole 22a and the first through hole. Hot / cold water is supplied to the first flow path 32 through the through hole h <b> 1, and the hot / cold water is discharged from the first discharge port 4.

  Further, when the second through hole 22b of the switching valve 22 coincides with the second through hole h2 of the housing H due to the rotation of the switching valve 22, the through hole 22b and the second through hole h2 communicate with each other, and The hot and cold water is supplied to the second flow path 33 through the through hole 22b and the second through hole h2, and the hot and cold water is discharged from the second discharge port 5.

As described above, in the above-described embodiment, in order to supply the mixed hot water from the switching mechanism to the first discharge port 4 and the second discharge port 5 to the discharge channel forming member 30, The first flow path 32 and the second flow path 33 are formed concentrically.
By employing this configuration, the length of the housing in the axial direction can be reduced as compared with the conventional case where the first flow path 32 and the second flow path 33 are formed in the axial direction of the housing, respectively. The length of the housing can be reduced, and the size of the housing can be reduced.

  One end of the actuator 17 is disposed in contact with the third bottom wall 41 of the discharge flow path forming member 30, and a communication hole 41 a communicating with the mixing chamber C is formed in the third bottom wall 41. Therefore, the distance between the hot and cold water mixing mechanism 10 and the switching mechanism 20 can be reduced as much as possible, the length of the housing H in the axial direction can be further reduced, and the size of the housing can be reduced.

Further, in the resin housing H, the first discharge port 4 and the second discharge port 5 can be arranged at the same position in the axial direction of the housing H and shifted in the radial direction.
Therefore, when the external force acting on the curan discharge port and the shower discharge port during use (the force acting on the curran pipe and the shower hose by the external force applied to the user) acts on one side of the housing H, the housing H is damaged. Can be suppressed.

DESCRIPTION OF SYMBOLS 1 Hot water mixing faucet 2 Hot water supply port 3 Water supply port 4 1st discharge port 5 2nd discharge port 10 Hot water mixing mechanism 12 Casing 14 Control valve element 14a Valve element 14b Hot water valve 14c Water valve 16 Energizing element 17 Actuator 20 Switching Mechanism 22 Switching valve 22a First through hole 22b Second through hole 30 Discharge flow path forming member 31 Water valve seat 32 First flow path 33 Second flow path 41 Third bottom wall 41a Communication hole 41b Guide Hole 42 Mixing chamber forming wall A Hot water inlet B Water inlet C Mixing chamber D Water inflow passage
H housing h switching valve housing h1 first through hole h2 second through hole

Claims (6)

A resin-made cylindrical housing having a hot water supply port, a water supply port, a first discharge port, and a second discharge port;
Mixing a hot water supplied from the hot water supply port and water supplied from the water supply port to form a mixed hot and cold water at a predetermined temperature, a hot water mixing mechanism housed in the housing,
A switching mechanism housed in a housing for switching a discharge port for discharging mixed hot water of a predetermined temperature from the hot water mixing mechanism from one of the first discharge port and the second discharge port. When,
A discharge flow path forming member housed in a housing, in which first and second flow paths for supplying mixed hot and cold water from the switching mechanism to a first discharge port and a second discharge port are formed; ,
A hot and cold mixing tap comprising at least
The discharge channel forming member,
The first flow path and the second flow path are formed concentrically, and the inlets of the first and second flow paths communicate with the switching mechanism, respectively, and the outlets of the first and second flow paths are formed of resin. A hot and cold water mixing tap, which is in communication with a first discharge port and a second discharge port of a cylindrical housing made of stainless steel. The switching mechanism,
A mixture of hot and cold water of a predetermined temperature from the hot and cold water mixing mechanism is supplied to the inside, and a switching valve having a bottomed cylindrical shape, which is rotated by a switching operation,
First and second through holes provided at different positions in the axial direction on the peripheral surface of the switching valve;
A switching valve housing that houses the switching valve;
First and second through holes formed in the switching valve housing at different positions in the axial direction and in different radial directions;
With
By rotating the switching valve,
When the first through hole of the switching valve coincides with the first through hole of the switching valve housing, the first through hole of the switching valve communicates with the inlet of the first flow path of the discharge flow path forming member. The outlet of the first flow path communicates with the first discharge port of the cylindrical housing made of resin,
When the second through hole of the switching valve coincides with the second through hole of the switching valve housing, the second through hole of the switching valve communicates with the inlet of the second flow path of the discharge flow path forming member. The outlet of the second flow path communicates with the second discharge port of the cylindrical housing made of resin,
The mixed hot and cold water supplied from the hot and cold water mixing mechanism is supplied to a first discharge port or a second discharge port of a resin-made cylindrical housing from a bottomed cylindrical switching valve. The hot and cold mixing tap described. The discharge channel forming member,
A first cylindrical peripheral wall;
A second peripheral wall formed concentrically with the first peripheral wall inside the first peripheral wall and having a shorter axial length than the first peripheral wall;
A third peripheral wall formed concentrically with the second peripheral wall inside the second peripheral wall and having a shorter axial length than the second peripheral wall;
A first bottom wall formed at the bottom of the first peripheral wall and the second peripheral wall;
A second bottom wall formed at the bottom of the second peripheral wall and the third peripheral wall;
A first flow path formed between the first peripheral wall, the second peripheral wall, and a first bottom wall portion;
A second flow path formed between the second peripheral wall, the third peripheral wall, and a second bottom wall;
With
3. The hot and cold water mixing apparatus according to claim 1, wherein the first flow path and the second flow path communicate with first and second through holes formed in the switching valve housing, respectively. plug. The discharge channel forming member,
A third bottom wall formed inside the third peripheral wall;
A communication hole formed in the third bottom surface;
A mixing chamber forming wall portion forming a mixing chamber extending in a direction opposite to the third peripheral wall;
A water inlet formed at the tip of the mixing chamber forming wall,
With
A water inflow passage is formed between the inner peripheral surface of the cylindrical housing and the outer peripheral surface of the first cylindrical peripheral wall,
Through the water inflow passage, the water inlet, the water supplied from the water supply port flows into the mixing chamber and is mixed with hot water,
4. The hot and cold water mixing tap according to claim 3, wherein the hot and cold water is supplied to the inside of the switching valve through a communication hole in the third bottom wall. An actuator that has one end in contact with a third bottom wall of the discharge flow path forming member and that expands and contracts in response to a change in temperature by the mixed hot and cold water, and the other end of the actuator that is in contact with the control valve body; , At least,
The hot / water mixer tap according to claim 4, wherein the actuator is housed in a mixing chamber formed by a mixing chamber forming wall portion.   The first and second discharge ports are arranged at a central position of the hot water supply port and the water supply port in the axial direction of the housing and at different positions in the axial direction. 5. The hot and cold water mixing tap according to any one of 5.

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