CN110886886A

CN110886886A - Cold and hot water mixing tap

Info

Publication number: CN110886886A
Application number: CN201910842881.4A
Authority: CN
Inventors: 根岸功; 丸山善太; 川岛拓麻; 菱沼胜之
Original assignee: Nippon Thermostat Co Ltd
Current assignee: Nippon Thermostat Co Ltd
Priority date: 2018-09-07
Filing date: 2019-09-06
Publication date: 2020-03-17
Also published as: TW202032046A; JP2020041572A; KR20200028841A

Abstract

The invention provides a cold and hot water mixing faucet device having a resin shell, wherein the length of the shell in the axial direction is short, the shell can be miniaturized, and a 1 st discharge port and a 2 nd discharge port are arranged at the central part of the shell. The cold and hot water mixing faucet is provided with a switching mechanism (20) for switching the outlets by discharging the mixed cold and hot water from the cold and hot water mixing mechanism from one of a 1 st outlet (4) and a 2 nd outlet, and a discharge flow path forming member (30) accommodated in the housing and having 1 st and 2 nd flow paths for supplying the mixed cold and hot water from the switching mechanism to the 1 st outlet and the 2 nd outlet. The discharge flow path forming member has a 1 st flow path and a 2 nd flow path formed concentrically, inlets of the 1 st and 2 nd flow paths communicating with the switching mechanism, respectively, and outlets of the 1 st and 2 nd flow paths communicating with a 1 st discharge port and a 2 nd discharge port of the cylindrical case H made of resin, respectively.

Description

Cold and hot water mixing tap

Technical Field

The present invention relates to a hot and cold water mixing faucet, and more particularly, to a hot and cold water mixing faucet having a resin case.

Background

Conventionally, a hot and cold water mixing faucet is widely used as a device for mixing hot water and cold water to generate a mixed hot and cold water at a predetermined temperature set by a user in a shower, a bath tub, a sanitary fixture for a sink, and the like.

As a general hot and cold water mixing faucet, a hot and cold water mixing faucet device is known which includes a thermostat box provided with a hot and cold water mixing mechanism that adjusts a mixing ratio of hot and cold water and changes a temperature of mixed hot and cold water, and a switching mechanism that switches between a faucet spout and a shower spout. The switching mechanism switches discharge of the mixed cold and hot water at a predetermined temperature from the thermostat case to the faucet spout and the shower spout.

The hot and cold water mixing mechanism and the switching mechanism are housed in a metal case, and a lever (dial) for temperature adjustment for adjusting the temperature of the hot and cold water mixing mechanism is provided at one end of the metal case, and a switching lever (dial) for switching the switching mechanism between the faucet discharge port and the shower discharge port is provided at the other end.

In the hot and cold water mixing faucet device configured as described above, the temperature of the discharged mixed hot and cold water is set to a predetermined temperature via a lever (dial) for temperature adjustment. By selecting either the faucet outlet or the shower outlet via the switching lever (dial), the user can obtain a mixed cold and hot water at a predetermined temperature from a desired outlet.

However, since a general hot and cold water mixing faucet has a metal case, the cost is high, and a hot and cold water mixing faucet having a resin case is desired, and japanese patent No. 2827806 proposes a hot and cold water mixing faucet having a resin case.

A hot and cold water mixing faucet device shown in japanese patent No. 2827806 will be described with reference to fig. 10.

As shown in fig. 10, a housing 51 of the hot and cold water mixing faucet device 50 is formed of a double housing of a resin inner housing 52 and a resin outer housing 53. A hot and cold water mixing mechanism 54 and a switching mechanism 55 are accommodated in the inner case 52. The hot and cold water mixing mechanism 54 and the switching mechanism 55 are disposed separately from each other, and a space S is provided therebetween.

Further, a hot water side passage 58 and a cold water side passage 59 from the hot water side and cold water side supply pipes 56, 57 to the hot and cold water mixing mechanism 54 are provided between the resin inner case 52 and the resin outer case 53. Further, a mixed cold and hot water passage 61 is provided from the switching mechanism 55 toward the faucet discharge port 60. Further, a mixed cold/hot water passage 63 is provided from the switching mechanism 55 to the shower outlet 62.

However, in the mixer faucet apparatus shown in japanese patent No. 2827806, since the inner case made of resin and the outer case made of resin are required as described above, the number of parts increases, which raises a technical problem of cost increase.

In addition, in the cold and hot water mixing faucet device shown in japanese patent No. 2827806, a passage for mixing cold and hot water from the switching mechanism toward the faucet spout and the shower spout is provided between the inner case made of resin and the outer case made of resin.

Therefore, the faucet discharge port and the shower outlet are disposed at positions offset in the axial direction of the mixer faucet device.

As a result, the housing of the hot and cold water mixing faucet device becomes long in the axial direction, and the housing becomes large.

Further, since the hot and cold water mixing mechanism and the switching mechanism are disposed apart from each other and a space is provided therebetween, the housing is elongated in the axial direction, which causes the housing to be large in size.

Further, since the faucet spout and the shower spout are disposed from the center of the housing toward the switching mechanism, an external force (force applied by a user via an external force applied to the faucet duct or the shower hose) applied to the faucet spout and the shower spout during use may act on one side of the housing, and the connection portion between the cold water supply port and the cold water side supply pipe and the housing near the connection portion may be damaged.

Disclosure of Invention

In order to solve the above-described problems, the present inventors have made extensive studies on a mixer faucet device having a resin housing, on the premise that a double housing is not used, the length of the housing in the axial direction is shortened, and a faucet outlet and a shower outlet are formed between a hot water supply port and a cold water supply port.

The present inventors have also found that a discharge flow path forming member is newly devised as a passage for mixing cold and hot water from the switching mechanism to the faucet spout and the shower spout, and the above-described problems can be solved by the discharge flow path forming member, and completed the present invention.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a mixer faucet device having a resin housing, which can be downsized by shortening the length of the housing in the axial direction, and in which a faucet discharge port and a shower discharge port are disposed in the center of the housing.

The mixer faucet includes at least a housing having a hot water supply port, a cold water supply port, a 1 st discharge port, and a 2 nd discharge port, a cylindrical resin-made cold and hot water mixing mechanism housed in the housing for mixing hot water supplied from the hot water supply port with cold water supplied from the cold water supply port to obtain a mixed cold and hot water at a predetermined temperature, a switching mechanism housed in the housing for switching discharge ports so as to discharge the mixed cold and hot water at the predetermined temperature from the cold and hot water mixing mechanism from either of the 1 st discharge port and the 2 nd discharge port, and a discharge flow path forming member housed in the housing and formed with a 1 st discharge port for supplying the mixed cold and hot water from the switching mechanism to the 1 st discharge port and the 2 nd discharge port, The 2 nd flow path is characterized in that the discharge flow path forming member is formed such that the 1 st flow path and the 2 nd flow path are formed concentrically, the inlets of the 1 st and 2 nd flow paths communicate with the switching mechanism, respectively, and the outlets of the 1 st and 2 nd flow paths communicate with the discharge ports of the 1 st and 2 nd discharge ports of the cylindrical case made of resin, respectively.

A cold and hot water mixing faucet includes a discharge flow path forming member in which a 1 st flow path and a 2 nd flow path for supplying mixed cold and hot water to a 1 st outlet and a 2 nd outlet, respectively, are formed concentrically, an inlet of the flow paths communicates with a switching valve mechanism, and an outlet of the flow paths communicates with outlets of the 1 st outlet and the 2 nd outlet of a cylindrical case made of resin. That is, the mixed cold and hot water discharged from the switching valve mechanism is discharged from the discharge ports of the 1 st discharge port and the 2 nd discharge port of the cylindrical housing through the 1 st flow path and the 2 nd flow path which are arranged concentrically.

Since the 1 st and 2 nd flow paths are formed concentrically in this way, the length of the resin case in the axial direction can be shortened, and the case can be made smaller.

Preferably, the switching mechanism includes a bottomed cylindrical switching valve, a switching valve housing, first and second through holes provided at different positions in an axial direction of a peripheral surface of the switching valve, and first and second through holes formed at different positions in the axial direction and in different radial directions in the switching valve housing, wherein the bottomed cylindrical switching valve supplies cold/hot water mixture of a predetermined temperature from the cold/hot water mixing mechanism to the inside, and the switching valve housing accommodates the switching valve by a switching operation and rotates the switching valve, whereby when the first through hole of the switching valve and the first through hole of the switching valve housing coincide with each other, the first through hole of the switching valve communicates with an inlet of the first flow path of the discharge flow path forming member, an outlet of the first flow path communicates with a 1 st discharge port of the cylindrical housing made of resin, and when the second through hole of the switching valve coincides with the second through hole of the switching valve housing, the 2 nd through hole of the switching valve communicates with the inlet of the 2 nd flow path of the discharge flow path forming member, the outlet of the 2 nd flow path communicates with the 2 nd outlet of the resin cylindrical case, and the mixed cold and hot water supplied from the cold and hot water mixing mechanism is supplied from the cylindrical switching valve with a bottom to the 1 st outlet or the 2 nd outlet of the resin cylindrical case.

Preferably, the discharge flow path forming member includes a 1 st peripheral wall, a 2 nd peripheral wall, a 3 rd peripheral wall, a 1 st bottom wall, a 2 nd bottom wall, a 1 st flow path, and a 2 nd flow path, the 1 st peripheral wall is cylindrical, the 2 nd peripheral wall and the 1 st peripheral wall are formed concentrically inside the 1 st peripheral wall and have a shorter length in the axial direction than the 1 st peripheral wall, the 3 rd peripheral wall and the 2 nd peripheral wall are formed concentrically inside the 2 nd peripheral wall and have a shorter length in the axial direction than the 2 nd peripheral wall, the 1 st bottom wall is formed at the bottom of the 1 st peripheral wall and the 2 nd peripheral wall, the 2 nd bottom wall is formed at the bottom of the 2 nd peripheral wall and the 3 rd peripheral wall, the 1 st flow path is formed between the 1 st peripheral wall, the 2 nd peripheral wall, and the 1 st bottom wall, Between the 3 rd peripheral wall and the 2 nd bottom wall, the 1 st flow path and the 2 nd flow path are respectively communicated with the 1 st through hole and the 2 nd through hole formed on the switching valve casing.

Further, it is preferable that the discharge flow path forming member includes a 3 rd bottom wall portion, a communication hole, a mixing chamber forming wall portion, and a cold water inlet, the 3 rd bottom wall portion is formed inside the 3 rd peripheral wall portion, the communication hole is formed in the 3 rd bottom wall portion, the mixing chamber forming wall portion is formed as a mixing chamber extending in a direction opposite to the 3 rd peripheral wall portion, the cold water inlet is formed at a distal end portion of the mixing chamber forming wall portion, a cold water inlet passage is formed between an inner peripheral surface of the resin cylindrical shell and an outer peripheral surface of the cylindrical 1 st peripheral wall portion, cold water supplied from the cold water supply port via the cold water inlet passage and the cold water inlet flows into the mixing chamber, is mixed with hot water, and the mixed cold and hot water is supplied to the inside of the switching valve via the communication hole of the 3 rd bottom wall portion.

In this way, since the cold water inlet and the mixing chamber forming wall portion are formed in the discharge flow path forming member, the mixing faucet mechanism and the switching mechanism can be disposed without providing a gap in the axial direction of the housing. As a result, the length of the resin case in the axial direction can be shortened, and the case can be downsized.

In particular, it is preferable that the hot and cold water mixing mechanism includes at least an actuator having one end connected to the 3 rd bottom wall portion of the discharge flow passage forming member and configured to expand and contract in response to a temperature change by mixing hot and cold water, and a control valve body connected to the other end of the actuator, and the actuator is accommodated in a mixing chamber formed by a mixing chamber forming wall portion.

With such a configuration, the length of the resin case in the axial direction can be shortened, and the case can be downsized.

The 1 st and 2 nd discharge ports may be disposed at the center of the hot water supply port and the cold water supply port in the axial direction of the housing, and at different positions in the axial direction.

With such a configuration, the length of the housing in the axial direction can be shortened, and the housing can be made compact. Further, since the 1 st outlet and the 2 nd outlet can be disposed at the center of the housing, external force acting on the 1 st outlet and the 2 nd outlet (force acting due to external force applied to the faucet duct or the shower hose by the user) during use acts uniformly on the hot water supply port and the cold water supply port, and does not act unevenly, so that damage to the hot water supply port connection portion, the cold water supply port connection portion, and the like can be suppressed.

According to the present invention, a mixer faucet device having a resin-made housing, which is short in the axial direction and can be downsized, can be obtained, and the 1 st outlet and the 2 nd outlet are disposed in the center of the housing.

Drawings

Fig. 1 is a front view of an embodiment of the present invention.

Fig. 2 is a bottom view of an embodiment of the present invention.

Fig. 3 is a sectional view a-a of fig. 1.

Fig. 4 is a sectional view B-B of fig. 3.

Fig. 5 is a view showing a flow passage forming member used in the embodiment, in which (a) is a front view and (b) is a bottom view.

FIG. 6 is a sectional view showing a flow channel forming member used in the embodiment, wherein (a) is a C-C sectional view, and (b) is a D-D sectional view.

Fig. 7 is a schematic perspective view showing 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 accommodated in the switching valve housing.

Fig. 10 is a sectional view showing a conventional hot and cold water mixing faucet.

Detailed Description

Hereinafter, a mixer faucet according to an embodiment of the present invention will be described with reference to fig. 1 to 9.

Fig. 1 and 2 show the overall shape of the hot and cold water mixing faucet 1. As shown in fig. 1 and 2, the mixer faucet 1 includes a hot water supply port 2 connected to a hot water supply pipe (not shown) for supplying hot water, and a cold water supply port 3 connected to a water supply pipe (not shown) for supplying cold water.

The hot and cold water mixing faucet 1 includes a 1 st outlet 4 for supplying mixed hot and cold water to a discharge pipe (not shown) of the faucet, and a 2 nd outlet 5 for supplying mixed hot and cold water to a shower by attaching a shower hose or the like.

The hot water supply port 2 and the cold water supply port 3 are provided on the back surface side of the substantially cylindrical casing H, the 1 st discharge port 4 is provided on the lower surface side of the substantially cylindrical casing 4, and the 2 nd discharge port 5 is provided on the back surface side of the casing H.

The 1 st and 2

nd discharge ports

4 and 5 are disposed at the center of the hot water supply port 2 and the cold 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 positions where the 1 st and 2

nd discharge ports

4 and 5 are circumferentially displaced by, for example, 90 degrees around the axis of the casing H.

The shell H is made of resin, and as the resin, for example, a resin having heat resistance such as PPS (polyphenylene sulfide) resin, PSF (polysulfone) resin, or the like is used.

The housing H having the hot water supply port 2, the cold water supply port 3, the 1 st discharge port 4, and the 2 nd discharge port 5 is formed by molding.

In this way, the 1 st and 2

nd discharge ports

4 and 5 are arranged at the center positions of the hot water supply port 2 and the cold water supply port 3 in the axial direction of the housing H and at different positions in the radial direction.

Therefore, it is possible to suppress the external force (force acting due to the external force applied to the faucet pipe or the shower hose by the user) acting on the 1 st and 2

nd discharge ports

4 and 5 during use from being biased toward the connection between the hot water supply pipe (not shown) and the hot water supply port 2 of the support case or the connection between the cold water supply pipe (not shown) and the cold water supply port 3.

As a result, breakage of the case H at or near the hot water supply port 2 or the cold water supply port 3 of the resin case H can be suppressed.

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

Next, the hot and cold water mixing mechanism 10 will be described with reference to fig. 3 and 4.

The hot and cold water mixing mechanism 10 includes a cover 12 that rotatably supports a rotary shaft 11. The cover 12 is made of resin, and is formed by molding using a heat-resistant resin such as PPS (polyphenylene sulfide) resin, PSF (polysulfone) resin, or the like.

As shown in fig. 3, the cover 12 is formed in a bottomed cylindrical shape as a whole, and a hot water inlet a that communicates with the hot water supply port 2 and allows hot water to flow into the cover 12 is formed in a cylindrical wall at a distal end portion of the cover 12.

A cold water inlet B into which cold water from the cold water supply port 3 flows is provided axially in parallel with the hot water inlet a at the distal end portion of the cover 12. The cool water inlet B is provided at a distal end portion of the discharge flow path forming member 30.

A hot water valve seat 12a is provided at a distal end portion of the cover 12, and a cold water valve seat 31 is provided at a distal end portion 30a of the discharge flow passage forming member 30. A hot water valve 14b and a cold water valve 14c are provided in a valve body 14a of the control valve body 14 described later.

The O-ring 6 is in contact with a valve body 14a of a control valve body 14 described later, and separates the hot water inlet a and the cold water inlet B when the valve body 14a moves, so that hot water and cold water are not mixed.

A part of the urging body 16 is housed in the control valve body 14, and one end of the urging body 16 is disposed in contact with the inner surface of the bottom portion 14d of the control valve body 14.

Further, one end of the actuator 17 is disposed in contact with the outer surface of the bottom portion 14d of the control valve body 14.

As shown in fig. 3, the actuator 17 is supported in contact with the 3 rd bottom wall 41 formed in the discharge flow passage forming member 30 and the outer surface of the bottom 14c of the control valve body 14.

The control valve body 14 is formed by molding a heat-resistant resin such as PPS (polyphenylene sulfide) resin or PSF (polysulfone) resin.

The hot and cold water mixing mechanism 10 is provided with an adjusting screw shaft 15. The adjustment screw shaft 15 is screwed to the rotary shaft 11, and moves forward and backward in accordance with the rotation of the rotary shaft 11 to adjust the position of the control valve element 14 in the axial direction.

The adjustment screw shaft 15 is configured to be movable in the axial direction of the cover 12 without rotating relative to the cover 12. Further, a threaded portion 15a is formed in the adjustment threaded shaft 15, and is screwed with the threaded portion 11a of the rotary shaft 11.

As a result, when the temperature control dial is rotated, the screw portion 11a of the rotary shaft 11 is rotated, the adjustment screw shaft 15 is slid in the axial direction, and the control valve element 14 is moved via the urging body 16. That is, the user can set and change the position of the control valve body 14 by operating the temperature adjustment dial so that the mixed water at a desired temperature is discharged.

The urging body 16 is made of a material having a constant spring constant. The urging body 16 may be, for example, a coil spring made of stainless steel.

Further, the actuator 17 extends and contracts in accordance with a temperature change. Examples of the actuator 17 include a shape memory alloy (sma) spring and a wax element, the sma spring being made of a material whose spring constant changes according to temperature.

The control valve body 14 can receive the repulsive force of the urging body 16 to slide the control valve body 16 toward the cold water valve seat 30a side, and can receive the repulsive force of the actuator 17 to slide the control valve body 14 toward the hot water valve seat 12a side.

That is, the control valve body 14 adjusts the interval between the hot water valve 14b and the hot water valve seat 12a and the interval between the cold water valve 14c and the cold water valve seat 31 by the balance of the loads received from the force applying body 16 and the actuator 17. With this configuration, the mixer faucet 1 adjusts the mixing ratio of the hot water flowing from the hot water inlet a and the water flowing from the cold water inlet B.

A mixing chamber C is formed from the inside of the hot water inlet a and the cold water inlet B of the cover 1 toward the switching mechanism 20. The mixing chamber C is formed by the discharge flow path forming member 30.

Next, the discharge flow path forming member 30 will be described with reference to fig. 3 to 6.

The discharge flow path forming member 30 is formed concentrically with a 1 st flow path 32 and a 2 nd flow path 33 for supplying the mixed cold and hot water to the 1 st discharge port 4 and the 2 nd discharge port 5, respectively.

As shown in fig. 4, the inlets of the 1 st and 2

nd flow paths

32 and 33 communicate with through holes H1 and H2 formed in the switching valve case H, respectively, and the

outlets

34 and 35 of the 1 st and 2 nd flow paths are configured to communicate with the 1 st and 2

nd discharge ports

4 and 5 of the cylindrical case H made of resin, respectively.

Specifically, as shown in fig. 5 and 6, the discharge flow path forming member 30 includes a 1 st peripheral wall 36 having a cylindrical shape, and a 2 nd peripheral wall 37 formed concentrically inside the 1 st peripheral wall 36 and having a shorter length in the axial direction than the 1 st peripheral wall 36.

Further, a 1 st bottom wall portion 38 is formed at the bottom of the 1 st peripheral wall 36 and the 2 nd peripheral wall 37.

Further, a 3 rd peripheral wall 39 which is formed inside the 2 nd peripheral wall 37 and has a shorter length in the axial direction than the 2 nd peripheral wall 37 is formed concentrically with the 2 nd peripheral wall 37.

Further, a 2 nd bottom wall portion 40 is formed at the bottom of the 2 nd peripheral wall 37 and the 3 rd peripheral wall 39.

In the discharge flow path forming member 30, a 3 rd bottom wall portion 41 is formed inside the 3 rd peripheral wall 39, and a communication hole 41a is formed in the 3 rd bottom wall portion 41.

In addition, a mixing chamber forming wall 42 forming a mixing chamber is provided in the 3 rd bottom surface 41 so as to extend in a direction opposite to the 1 st to 3 rd

peripheral walls

36, 37, 39.

A mixing chamber C having a cylindrical shape with a bottom for mixing cold and hot water is formed by the 3 rd bottom surface portion 41 and the mixing chamber forming wall portion 42.

Further, a cold water inlet B and a cold water valve seat 31 are provided at a distal end portion of the mixing chamber forming wall portion 30. The 3 rd bottom surface 41 is engaged with an end of the actuator 17.

A guide hole 41b for movably guiding the shaft portion 14e of the control valve body 14 is provided in the center of the 3 rd bottom surface portion 41.

As shown in fig. 3 and 4, the end portion of the 1 st peripheral wall 36 and the 1 st flange portion h3 of the switching valve housing h are in close contact with each other via the O-ring 7 a. Further, the end portion of the 2 nd peripheral wall 37 and the 2 nd flange portion h4 of the switching valve housing h are in close contact with each other via the O-ring 7 b.

Thereby, the 1 st flow path 32 is formed between the 1 st peripheral wall 36, the 2 nd peripheral wall 37, the 1 st bottom wall 38, and the switching valve housing h.

Further, the end of the 3 rd peripheral wall 39 and the 3 rd flange h5 of the switching valve case h are in close contact with each other via the O-ring 7 c. Thereby, the 2 nd flow path 33 is formed between the 2 nd peripheral wall 37, the 3 rd peripheral wall 39, the 2 nd bottom wall portion 40, and the switching valve casing h.

As shown in fig. 4, the 1 st through hole h1 corresponding to the 1 st flow path 32 and the 2 nd through hole h2 corresponding to the 2 nd flow path 33 are formed in the switching valve casing h. One end of the 1 st flow path 32 and one end (inlet) of the 2 nd flow path 33 are configured to communicate with the through holes h1 and h2 of the switching valve housing h, respectively.

The other end (1 st channel outlet 34) of the 1 st channel 32 is configured to communicate with the 1 st discharge port 4, and the other end (2 nd channel outlet 35) of the 2 nd channel 33 is configured to communicate with the 2 nd discharge port 5.

As a result, the 1 st through hole h1 of the switching valve housing h communicates with the 1 st discharge port 4 via the 1 st flow path 32, and the 2 nd through hole h2 communicates with the 1 st discharge port 4 via the 2 nd flow path 33.

One end of the housing H is closed by a cover portion H6 of the switching valve housing via an O-ring 7 d. Further, a cold water inflow passage D is formed between the inner peripheral surface of the resin cylindrical case H and the outer peripheral surface of the cylindrical 1 st peripheral wall 36. The cold water supplied from the cold water supply port 3 flows into the mixing chamber C through the cold water inflow passage D and the cold water inflow port B.

The hot water supplied from the hot water supply port 2 through the hot water inlet a and the cold water supplied through the cold water inlet B are mixed in the mixing chamber C, and the mixed cold and hot water is supplied into the switching valve 22 through the communication hole 41a of the 3 rd bottom wall 41.

Next, the switching mechanism 20 will be described with reference to fig. 3, 4, and 7 to 9.

As shown in fig. 3 and 4, the switching mechanism 20 includes a bottomed cylindrical switching valve 22 attached to a rotary shaft 21 that is rotated by a switching operation of a user.

As shown in fig. 7, the switching valve 22 is provided with a 1 st through hole 22a and a 2 nd through hole 22b along the axial direction of the peripheral surface thereof. The 1 st through hole 22a and the 2 nd through hole 22b are provided with two through holes, respectively.

On the other hand, through holes h1, h2 are formed in the switch valve casing h that houses the switch valve 22 at different positions in the axial direction and in different radial directions, as shown in fig. 8. The through holes h1 and h2 are formed at corresponding positions (heights) of the 1 st through hole 22a and the 2 nd through hole 22 b.

Fig. 8 is a view showing essential parts of the switching valve casing h, and the flange part and the like are not shown.

As shown in fig. 3 and 4, the switching valve 22 is accommodated in a switching valve housing h via a cylindrical sleeve 23. The cylindrical sleeve 23 improves the rotational sliding property of the switching valve 22, but through holes are also formed in the sleeve 23 at the same positions as the through holes h1 and h2 of the switching valve housing h.

Since the switching mechanism 20 is configured as described above, as shown in fig. 9, when the rotating shaft 21 is rotated to rotate the switching valve 22, and the 1 st through hole 22a of the switching valve 22 is aligned with the 1 st through hole H1 of the housing H, the through hole 22a and the 1 st through hole H1 are communicated, and the mixed cold and hot water is supplied to the 1 st flow path 32.

At this time, the 2 nd through hole 22b of the switching valve 22 and the 2 nd through hole H2 of the housing H are not aligned (not communicated), so the mixed cold and hot water is not supplied to the 2 nd flow path 33.

When the 2 nd through hole 22b of the switching valve 22 is rotated and coincides with the 2 nd through hole H2 of the housing H, the through hole 22b communicates with the 2 nd through hole H2, and the mixed cold and hot water is supplied to the 2 nd flow path 33.

At this time, the 1 st through hole 22a of the switching valve 22 is not aligned with (does not communicate with) the 1 st through hole H1 of the housing H, and therefore the mixed cold and hot water is not supplied to the 1 st flow path 32.

The operation of the hot and cold water mixing faucet will be described.

First, the hot water discharge temperature is set by adjusting the biasing amount of the biasing member 16 by a temperature adjustment handle (not shown). Then, in the same manner as the conventional mixer faucet, the opening degree of the hot water inlet a and the opening degree of the cold water inlet B of the control valve body 14 are adjusted by the actuator 17 and the urging body 16, thereby adjusting the hot water discharge temperature.

Here, the hot water flows into the mixing chamber C through the hot water supply port 2, the hot water flow inlet a (between the hot water valve 14b and the hot water valve seat 12 a). On the other hand, cold water flows into the mixing chamber C through the cold water supply port 3, the cold water inflow passage D, and the cold water inflow port B (between the cold water valve 14C and the cold water valve seat 31).

The cold and hot mixed water mixed in the mixing chamber C flows into the selector valve 22 through the communication hole 41a of the 3 rd bottom wall 41.

Next, the user rotates the rotary shaft 21 to select the 1 st and 2 nd discharge ports.

When the 1 st through hole 22a of the switching valve 22 matches the 1 st through hole H1 of the housing H, the through hole 22a and the 1 st through hole H1 communicate with each other, and the mixed cold and hot water is supplied to the 1 st flow path 32 through the through hole 22a and the 1 st through hole H1, and the mixed cold and hot water is discharged from the 1 st discharge port 4.

When the 2 nd through hole 22b of the switching valve 22 is aligned with the 2 nd through hole H2 of the housing H by the rotation of the switching valve 22, the through hole 22b communicates with the 2 nd through hole H2, and the mixed cold and hot water is supplied to the 2 nd flow path 33 through the through hole 22b and the 2 nd through hole H2, and the mixed cold and hot water is discharged from the 2 nd discharge port 5.

As described above, in the above embodiment, in order to supply the mixed cold and hot water from the switching mechanism to the 1 st outlet 4 and the 2 nd outlet 5, the 1 st flow path 32 and the 2 nd flow path 33 are formed concentrically in the discharge flow path forming member 30.

With this configuration, the length of the casing in the axial direction can be made shorter and the casing can be made smaller than in the case where the 1 st channel 32 and the 2 nd channel 33 are formed along the axial direction of the casing as in the conventional case.

Further, one end of the actuator 17 is disposed in contact with the 3 rd bottom wall 41 of the discharge flow path forming member 30, and a communication hole 41a communicating with the mixing chamber C is formed in the 3 rd bottom wall 41. Therefore, the distance between the hot and cold water mixing mechanism 10 and the switching mechanism 20 can be made extremely short, the length of the housing H in the axial direction can be made shorter, and the housing can be made compact.

Further, the 1 st discharge port 4 and the 2 nd discharge port 5 can be disposed at the same position in the axial direction of the resin case H and at positions offset in the radial direction.

Therefore, it is possible to suppress breakage of the housing H caused by external force (force due to external force applied to the faucet duct or the shower hose by the user) acting on the faucet spout and the shower spout when in use acting on one side of the housing H.

Description of the reference numerals

1 cold and hot water mixing tap

2 hot water supply port

3 cold water supply port

41 st discharge port

5 nd 2 nd discharge port

10 cold and hot water mixing mechanism

12 cover

14 control valve body

14a valve body

14b hot water valve

14c cold water valve

16 force applying body

17 actuator

20 switching mechanism

22 switching valve

22a 1 st through hole

22b No. 2 through hole

30 discharge flow path forming member

31 cold water valve seat

32 1 st flow path

33 No. 2 flow path

41 rd 3 bottom wall part

41a communicating hole

41b guide hole

42 mixing chamber forming wall portion

A hot water inlet

Cold water inlet

C mixing chamber

D cold water inflow path

H shell

h switching valve casing

h 11 st through hole

h 22 nd through hole.

Claims

1. A hot and cold water mixing faucet includes at least a housing, a hot and cold water mixing mechanism, a switching mechanism, and a discharge flow path forming member,

the shell has a hot water supply port, a cold water supply port, a 1 st discharge port and a 2 nd discharge port, is in a cylindrical shape made of resin,

the cold and hot water mixing means is housed in a case, and mixes hot water supplied from the hot water supply port and cold water supplied from the cold water supply port to obtain mixed cold and hot water at a predetermined temperature,

the switching mechanism is accommodated in the housing, and the discharge ports are switched to discharge the mixed cold and hot water of a predetermined temperature from the cold and hot water mixing mechanism through one of the 1 st discharge port and the 2 nd discharge port,

the discharge flow passage forming member is accommodated in the housing, and 1 st and 2 nd flow passages for supplying the mixed cold and hot water from the switching mechanism to the 1 st and 2 nd discharge ports are formed,

the discharge flow path forming member is formed such that a 1 st flow path and a 2 nd flow path are formed concentrically, inlets of the 1 st and 2 nd flow paths communicate with the switching mechanism, respectively, and outlets of the 1 st and 2 nd flow paths communicate with outlets of a 1 st discharge port and a 2 nd discharge port of the cylindrical case made of resin, respectively.

2. The mixer tap of claim 1,

the switching mechanism comprises a bottomed cylindrical switching valve, a switching valve housing, 1 st and 2 nd through holes provided at different positions in the axial direction on the peripheral surface of the switching valve, 1 st and 2 nd through holes formed at different positions in the axial direction and formed in different radial directions in the switching valve housing,

the cylindrical switching valve with a bottom is configured such that the cold and hot water mixture of a predetermined temperature from the cold and hot water mixing means is supplied to the inside and rotated by a switching operation,

the switching valve housing accommodates the switching valve,

the switching valve is rotated, whereby,

when the 1 st through hole of the switching valve and the 1 st through hole of the switching valve housing are matched, the 1 st through hole of the switching valve is respectively communicated with the inlet of the 1 st flow path of the discharge flow path forming component, the outlet of the 1 st flow path is communicated with the 1 st discharge port of the cylindrical shell made of resin,

when the 2 nd through hole of the switching valve and the 2 nd through hole of the switching valve housing are matched, the 2 nd through hole of the switching valve is respectively communicated with the inlet of the 2 nd flow path of the discharge flow path forming component, the outlet of the 2 nd flow path is communicated with the 2 nd discharge port of the cylindrical shell made of resin,

the mixed cold and hot water supplied from the cold and hot water mixing mechanism is supplied from a cylindrical switching valve with a bottom to the 1 st outlet or the 2 nd outlet of the cylindrical case made of resin.

3. A mixer tap as claimed in claim 1 or claim 2,

the discharge flow path forming member includes a 1 st peripheral wall, a 2 nd peripheral wall, a 3 rd peripheral wall, a 1 st bottom wall, a 2 nd bottom wall, a 1 st flow path, and a 2 nd flow path,

the aforementioned 1 st peripheral wall is cylindrical,

the 2 nd peripheral wall is formed concentrically with the 1 st peripheral wall inside the 1 st peripheral wall and has a shorter length in the axial direction than the 1 st peripheral wall,

the 3 rd peripheral wall and the 2 nd peripheral wall are formed concentrically inside the 2 nd peripheral wall and have a shorter length in the axial direction than the 2 nd peripheral wall,

the 1 st bottom wall portion is formed at the bottom of the 1 st peripheral wall and the 2 nd peripheral wall,

the 2 nd bottom wall portion is formed at the bottom of the 2 nd peripheral wall and the 3 rd peripheral wall,

the 1 st flow path is formed between the 1 st peripheral wall, the 2 nd peripheral wall and the 1 st bottom wall,

the 2 nd flow path is formed between the 2 nd peripheral wall, the 3 rd peripheral wall and the 2 nd bottom wall,

the 1 st flow path and the 2 nd flow path are respectively communicated with the 1 st through hole and the 2 nd through hole formed in the switching valve casing.

4. The mixer tap of claim 3 wherein,

the discharge flow passage forming member includes a 3 rd bottom wall portion, a communication hole, a mixing chamber forming wall portion, and a cold water inlet,

the 3 rd bottom wall part is formed inside the 3 rd peripheral wall,

the communication hole is formed on the 3 rd bottom surface part,

the mixing chamber forming wall portion forms a mixing chamber extending in a direction opposite to the 3 rd peripheral wall,

the cold water inlet is formed at the end of the mixing chamber wall,

a cold water inlet passage is formed between the inner peripheral surface of the resin cylindrical case and the outer peripheral surface of the cylindrical 1 st peripheral wall,

the cold water supplied from the cold water supply port flows into the mixing chamber through the cold water inflow passage and the cold water inflow port, and is mixed with the hot water,

the cold and hot mixed water is supplied to the interior of the switching valve through the communication hole of the 3 rd bottom wall portion.

5. The mixer tap of claim 4 wherein,

the hot and cold water mixing mechanism at least comprises an actuator and a control valve body,

one end of the actuator is connected to the 3 rd bottom wall portion of the discharge flow passage forming member, and is expanded and contracted in response to a temperature change by mixing hot and cold water,

the control valve body is connected with the other end of the actuator,

the actuator is accommodated in a mixing chamber formed by a mixing chamber forming wall portion.

6. A mixer tap as claimed in claim 1 or claim 2,

the 1 st and 2 nd discharge ports are disposed at the center positions of the hot water supply port and the cold water supply port in the axial direction of the housing, and at different positions in the axial direction.