JP7353207B2 - hot water mixing faucet - Google Patents

Description

The present invention relates to a hot and cold water mixing faucet.

2. Description of the Related Art Conventionally, there has been known a hot water mixing faucet that can adjust the mixing ratio of hot water and discharge hot water (for example, see Patent Document 1). Hot water mixing faucets are installed in kitchens and bathrooms of ordinary homes, bathrooms of hotels, toilets in department stores, airports, and the like.

Not only the shape of the hot and cold water mixing faucet itself, but also the shape of the mixer faucet may be required to give a sense of luxury in order to enhance the atmosphere of the various places where the faucet is installed.

In addition, by molding the cylindrical body as a casing, we can meet the requirements for strength against excessive water pressure that occurs when water hammer occurs, and for durability against rapid temperature changes caused by cold and hot water. Satisfied.

However, when the cylindrical body is molded, the cylindrical body has a built-in hot water mixing part, a switching valve for switching between flush and shower, and the inner peripheral surface of the cylindrical body has a hot water side passage, a water side passage and a mixed hot water passage. Because it is used as a casing, various machining processes are required inside the casing in order to ensure sealing, incorporate hot water mixing parts, and form passages.

For example, if the cast surface is left as it is, it is not possible to ensure sealing performance, or it is not possible to incorporate hot water/water mixing parts or form uniform passages. Requires cutting, lathing, polishing, etc. of grooves, etc.

Machining such as cutting holes and grooves, turning, polishing, etc. can be easily carried out on the outside of the cylinder, but inside the cylinder there are restrictions on the tools that can be used, and This requires special tools and complicated manufacturing processes. In other words, complicated machining had to be performed inside the cylinder.

In addition, the cylindrical body formed by molding is heavier than it appears, and it is necessary to take the weight into account when transporting, handling, and installing the cylindrical body. Furthermore, since castings have a small heat capacity and lack heat insulation, when a hot water flow path is provided inside the cylindrical body, the temperature on the surface of the cylindrical body becomes partially high, making it difficult to use. Therefore, there has been a demand for a design in which a mixing section is installed at the hot water inlet so that the hot water is mixed with water as soon as it flows in, without providing a hot water flow path inside the cylinder. In order to meet such demands, in Patent Document 1, the cylindrical body serving as the casing is made of resin.

Japanese Patent Application Publication No. 6-294475

In a bathroom with a hot and cold water mixing faucet that uses a cylindrical body as a molded casing, a hot water inlet, two outlets for a flush or shower, and a water inlet are arranged in this order. Therefore, even when the cylindrical body as a casing is made of resin, it is necessary to arrange the hot water supply port, discharge port, and water supply port in this order in order to facilitate replacement work with an existing molded product. In this case, it is necessary to provide a guide path that guides the water to the hot water supply port side where the mixing section is arranged. At this time, it is necessary to seal between the cylindrical body and the outer peripheral surface of the switching valve so as to surround the discharge port so that water does not mix between the guide path and the discharge port to the flusher or shower.

However, when trying to seal the two outlet ports of the shower spout and the collar, which are arranged at intervals in the circumferential direction of the cylinder, two annular shapes are formed on the circumferential surface of the cylinder so as to surround each outlet. It is necessary to arrange the seals at intervals in the circumferential direction.

Here, in a seal structure using a general O-ring, it is arranged circumferentially around the outer periphery of the switching valve, so a step is created between the two seal members in the axial direction, and the seal ring By shortening the press-fit distance at which the seal member begins to be compressed between the cylinder and the switching valve, the seal member is prevented from being rolled up during insertion.

However, when the sealing member is placed on the circumferential surface of the cylinder so as to surround the discharge port so as not to block the flow of water passing through the guide channel, it is recommended to insert a switching valve with a sealing member inside the cylinder. When doing so, the press-fitting distance becomes long, and there is a risk that the sealing performance of the sealing member may deteriorate due to the sealing member being twisted, rolled up, or damaged, so it is difficult to assemble the switching valve with the sealing member installed. There is a problem that adhesion deteriorates.

In view of the above points, an object of the present invention is to provide a hot water mixing faucet that can improve the ease of assembling a switching valve equipped with a sealing member.

[1] In order to achieve the above object, the present invention:
A hot water mixing faucet (for example, hot water mixing faucet 1 of the embodiment. The same applies hereinafter),
A cylindrical body (for example, the cylindrical body 2 of the embodiment; the same applies hereinafter);
a hot water supply port (for example, the hot water supply port 21 of the embodiment; the same applies hereinafter) that penetrates from the outer circumferential surface to the inner circumferential surface of the cylindrical body and guides hot water into the cylindrical body;
a water inlet (for example, the water inlet 22 of the embodiment; the same applies hereinafter) that penetrates from the outer peripheral surface to the inner peripheral surface of the cylindrical body and guides water into the cylindrical body;
a mixing section (for example, the mixing section 3 of the embodiment; the same applies hereinafter) that is arranged in the cylinder and mixes hot water in a temperature-adjustable manner;
a first discharge port (for example, the first discharge port 23 in the embodiment; the same applies hereinafter) that penetrates from the inner circumferential surface to the outer circumferential surface of the cylindrical body and is capable of discharging hot water discharged from the mixing section;
a second discharge port (for example, the second discharge port 24 in the embodiment; the same applies hereinafter) that penetrates from the inner circumferential surface to the outer circumferential surface of the cylindrical body and is capable of discharging hot water discharged from the mixing section;
a switching valve (for example, switching valve 4 of the embodiment; the same applies hereinafter) that is inserted into the cylindrical body and can freely select between the first discharge port and the second discharge port;
The switching valve includes a switching outer cylinder (for example, the switching outer cylinder 41 of the embodiment; the same applies hereinafter) and a switching inner cylinder (for example, the switching inner cylinder 42 of the embodiment) rotatably disposed within the switching outer cylinder. .The same applies hereinafter) and,
A guide path (for example, the guide path 41c of the embodiment; the same applies hereinafter) is provided between the cylinder body and the switching outer cylinder, and guides the water led from the water supply port to the mixing section.
The switching outer cylinder has a first communication hole (for example, the first communication hole 41a of the embodiment; the same applies hereinafter) that communicates with the first discharge port, and a second communication hole (for example, the same applies hereinafter) that communicates with the second discharge port. , the second communication hole 41b of the embodiment (the same applies hereinafter),
The switching inner cylinder is rotatably arranged with respect to the switching outer cylinder, and has a selection hole that can freely select either the first communication hole or the second communication hole by rotating the switching inner cylinder. (For example, the first selection hole 42a and the second selection hole 42b of the embodiment. The same applies hereinafter.)
A first annular seal is provided between the cylindrical body and the switching outer cylinder to liquid-tightly close the hot water flowing between the first communication hole and the first discharge port so that the hot water does not leak into the guide path. For example, the first annular seal 51 of the embodiment (the same applies hereinafter) and the second annular seal liquid-tightly closed to prevent hot water flowing between the second communication hole and the second discharge port from leaking into the guide path. An annular seal (for example, the second annular seal 52 of the embodiment; the same applies hereinafter) is provided,
The first annular seal and the second annular seal gradually align with the central axis of the cylindrical body (for example, the central axis L0 in the embodiment; the same applies hereinafter) with respect to the insertion direction of the switching valve into the cylindrical body. The inner circumferential surface of the cylinder body and the outer circumferential surface of the switching outer cylinder are configured to be inclined so that the switching outer cylinder is inclined so as to approach the switching outer cylinder.

According to the present invention, the first annular seal and the second annular seal are arranged around the inner periphery of the cylindrical body so that they gradually approach the central axis of the cylindrical body as they approach the front in the insertion direction of the switching valve into the cylindrical body. Since the surface and the outer peripheral surface of the switching outer cylinder are configured to be inclined, when inserting the switching valve into the cylinder, at the beginning of insertion, the first annular seal and Frictional force via the second annular seal can be suppressed.

When the insertion of the switching valve into the cylindrical body is completed, the first annular seal and the second annular seal can be firmly compressed by the cylindrical body and the switching valve. Therefore, according to the present invention, when the switching valve is inserted into the cylinder, the first annular seal and the second annular seal are not easily rolled over, and an appropriate seal structure can be easily formed, and the seal member can be attached. It is possible to improve the ease of assembling the switching valve.

[2] Further, in the present invention, the guide path includes a protrusion (for example, the first protrusion 61 of the embodiment, the It is preferable to provide a second protrusion 62 and a third protrusion 63 (the same applies hereinafter).

Here, if the guide path is formed wide to ensure the amount of water, the contact area between the cylinder and the switching outer cylinder is small, and the elastic force of the first annular seal and the second annular seal causes the switching outer cylinder to become eccentric with respect to the cylinder. However, there is a possibility that the first annular seal and the second annular seal may not be properly compressed between the cylinder and the switching outer cylinder. If the first annular seal and the second annular seal are not properly compressed, the water in the guide path will unintentionally mix with the hot water discharged from the first and second discharge ports, and the temperature will be adjusted to an appropriate temperature in the mixing section. The temperature of the mixed water will drop.

According to the present invention, even if the guide path is formed wide to ensure the amount of water, the cylinder body and the switching outer cylinder can firmly contact each other through the protrusion, so that the first annular seal and the second annular seal can be appropriately compressed, and it is possible to prevent water in the guide path from unintentionally mixing with hot water discharged from the first discharge port and the second discharge port.

[3] Further, in the present invention, the inclination angles of the first annular seal and the second annular seal are set to be larger than the draft angle of the inner circumferential surface of the cylindrical body that is necessary when molding the cylindrical body. Preferably.
According to the present invention, it is possible to further improve the ease of assembling a switching valve equipped with a seal member.

FIG. 1 is an explanatory diagram schematically showing a hot water mixing faucet according to an embodiment of the invention. FIG. 1 is a cross-sectional view schematically showing the switching valve of this embodiment. FIG. 3 is an explanatory diagram showing a first communication hole and a second communication hole of the hot water mixing faucet of the first example of the present embodiment. An explanatory view showing one side of the switching outer cylinder of the first embodiment. An explanatory view showing one side of the switching outer cylinder of the first embodiment. FIG. 3 is an explanatory diagram showing the switching outer cylinder of the first embodiment from the central axis direction. FIG. 7 is an explanatory diagram showing a cross section of the switching outer cylinder of the first embodiment taken along line VII-VII in FIG. 6;

DESCRIPTION OF THE PREFERRED EMBODIMENTS A hot water mixing faucet according to an embodiment of the invention will be described with reference to the drawings. FIG. 1 schematically shows a hot water mixing faucet 1 of this embodiment. The hot water mixing faucet 1 of this embodiment includes a cylindrical body 2 made of resin, and a compression amount of a temperature-sensitive spring (not shown), which is placed inside the body 2 and whose spring constant changes depending on the temperature. It includes a mixing part 3 that allows temperature adjustment by changing the mixing ratio of hot water and water by adjusting (initial load, initial deflection) with a knob 3a, and a switching valve 4 inserted into a cylindrical body 2. In the mixing part 3, hot water and water enter individually from the outer periphery to the inside, and the hot water and water are mixed inside the mixing part 3. The mixed water mixed in the mixing section 3 is supplied to the inside of a switching valve 4 (switching inner cylinder described later). In addition, in the mixing part 3, a thermoelement using wax may be used instead of the temperature-sensing spring for temperature sensing, and the configuration of the mixing part 3 may be such that it can mix hot water and adjust the temperature to an appropriate temperature.

The cylinder 2 has a hot water supply port 21 penetrating from the outer peripheral surface to the inner peripheral surface of the cylinder 2, and a hot water supply port 21 extending from the hot water supply port 21 to the outer circumference of the cylinder 2 at a distance in the direction in which the central axis L0 of the cylinder 2 extends. a water supply port 22 penetrating from the surface to the inner peripheral surface; a first discharge port 23 disposed between the hot water supply port 21 and the water supply port 22 and penetrating downward from the inner peripheral surface to the outer peripheral surface of the cylindrical body 2; , a second discharge port 24 that is displaced from the first discharge port 23 in the circumferential direction and penetrates from the inner peripheral surface to the outer peripheral surface of the cylindrical body 2 toward the rear side.

Hot water is supplied to the hot water supply port 21 from a water heater (not shown). Water is supplied to the water supply port 22 from a water pipe (not shown). Hot water discharged from the mixing section 3 is discharged from the first discharge port 23 and the second discharge port 24 . A collar (not shown) is connected to the first outlet 23, and a shower (not shown) is connected to the second outlet 24.

Referring to the schematic diagram of FIG. 2, the switching valve 4 includes a switching outer cylinder 41 made of resin and disposed in a non-rotating manner within the cylinder body 2, and a switching outer cylinder 41 made of resin and disposed rotatably within the switching outer cylinder 41. Alternatively, a switching inner cylinder 42 made of resin is provided. The switching outer cylinder 41 has a first communication hole 41a (FIG. 3) penetrating from the inner circumferential surface to the outer circumferential surface, and a space between the first communication hole 41a and the central axis L0 direction of the cylinder body 2. A second communication hole 41b penetrating from the inner circumferential surface to the outer circumferential surface is provided so as to be spaced from each other in the circumferential direction.

Here, the resin used as the material for the cylinder body 2 and the switching outer cylinder 41 can be made of plastic that has excellent heat resistance, dust resistance, chemical resistance, flame retardance, etc. A plastic having a strength of about 50 MPa or more, an impact strength of about 50 J/m or more, and a heat distortion temperature of about 100° C. or more can be used. For example, polyamide (PA), polycarbonate (PC), polyacetal (POM), modified polyphenylene ether (PPE), polyester, polyphenylene sulfide (PPS), polyarylate (PAR), polyetherimide (PEI), polysulfone (PSF), Polyethersulfone (PES), polyetherketone (PEK), polyetheretherketone (PEEK), polyimide (PI), polyamideimide (PAI), fluororesin, liquid crystal plastic, thermosetting with excellent impact resistance and chemical resistance Polymer resin, glass fiber resin, etc. can be used.

The switching inner cylinder 42 has a first selection hole 42a penetrating from the inner peripheral surface to the outer peripheral surface, and a first selection hole 42a that is spaced apart from the first selection hole 42a in the direction of the central axis L0 and also in the circumferential direction of the switching inner cylinder 42. As shown, a second selection hole 42b penetrating from the inner circumferential surface to the outer circumferential surface is provided. A knob 42c is provided at the end of the switching inner cylinder 42 opposite to the mixing part 3, and by rotating the knob 42c, the switching inner cylinder 42 is rotated with respect to the switching outer cylinder 41. be able to.

The switching inner cylinder 42 has a first communication position where the first selection hole 42a communicates with the first communication hole 41a and communication between the second selection hole 42b and the second communication hole 41b is blocked, and the first selection hole 42a. A water stop position where communication between the first selection hole 42a and the first communication hole 41a is blocked, and communication between the second selection hole 42b and the second communication hole 41b is also blocked, and a water stop position where the communication between the first selection hole 42a and the first communication hole 41a is blocked. It can be freely switched to three positions: a second communication position where communication is blocked and the second selection hole 42b and the second communication hole 41b communicate with each other.

As described later, the first communication hole 41a and the first discharge port 23 communicate with each other, and the second communication hole 41b and the second discharge port 24 communicate with each other, so that the switching valve 4 is connected to the switching inner cylinder. By rotating 42 with respect to the switching outer cylinder 41, the first discharge port 23 and the second discharge port 24 can be freely selected.

A plurality of O-rings 43 are provided between the switching outer cylinder 41 and the switching inner cylinder 42 to prevent water entering from the guide path 41c from mixing with mixed water discharged from the first selection hole 42a or the second selection hole 42b. is provided. Note that the sealing structure using the O-ring 43 is not limited to that shown in FIG. 2, and can be modified as appropriate.

3 to 7 show a first example of the switching outer cylinder 41 of this embodiment. Referring to FIGS. 3 to 7, the outer circumferential surface of the switching outer cylinder 41 has a recess extending toward the mixing part 3 side so as to guide water flowing into the cylinder body 2 from the water supply port 22 to the mixing part 3. A guide path 41c is provided.

Further, on the outer circumferential surface of the switching outer cylinder 41, there is provided a space between the switching outer cylinder 41 and the cylinder body 2 so that the hot water discharged from the first communication hole 41a is guided to the first discharge port 23 without leaking into the guide path 41c. A first annular seal 51 (FIG. 7) made of an elastic member such as rubber is provided to annularly close the opening. The first annular seal 51 is arranged to surround the first communication hole 41a. Here, "annular" means a closed ring shape, and does not include a C-shape.

Further, on the outer circumferential surface of the switching outer cylinder 41, there is a space between the switching outer cylinder 41 and the cylinder body 2 so that the hot water discharged from the second communication hole 41b is guided to the second discharge port 24 without leaking into the guide path 41c. A second annular seal 52 made of an elastic member such as rubber is provided to annularly close the opening. The second annular seal 52 is arranged to surround the second communication hole 41b. Here, "annular" means a closed ring shape, and does not include a C-shape.

Moreover, although the annular seal of this embodiment is a non-circular seal, it may be circular, and the shape can be changed as appropriate. Further, since the first annular seal 51 and the second annular seal 52 only need to be formed as two rings so as to separate the first communication hole 41a and the second communication hole 41b, for example, the first annular seal 51 and the second annular seal 52 may be connected at the outer periphery.

The first annular seal 51 and the second annular seal 52 are fitted into a first seal groove 41d and a second seal groove 41e formed on the outer peripheral surface of the switching outer cylinder 41, respectively. The bottom surfaces of the first seal groove 41d and the second seal groove 41e are inclined so as to gradually approach the central axis L0 of the cylinder body 2 as they go toward the front side in the insertion direction in which the switching valve 4 is inserted into the cylinder body 2. It has a tapered shape. In the following description, the forward side of the switching valve 4 in the insertion direction of the central axis L0 may be referred to as a distal end side, and the side opposite to this distal end side may be appropriately described as a proximal end side.

The first seal groove 41d and the second seal groove 41e are formed at a constant depth in the outer peripheral tapered pedestal portion of the switching outer cylinder 41 in which the first seal groove 41d and the second seal groove 41e are formed. As a result, the bottom surfaces of the first seal groove 41d and the second seal groove 41e as a whole incline toward the central axis L0 as they move toward the front side in the insertion direction.

Further, the inner peripheral surface of the cylinder 2 is also tapered at the bottom surface of the first seal groove 41d and the second seal groove 41e (or the pedestal part of the switching outer cylinder 41 where the first seal groove 41d and the second seal groove 41e are formed). It is formed into a tapered shape so as to be parallel to the shape.

As a result, when inserting the switching valve 4 into the cylinder body 2, at the beginning of insertion, a frictional force is generated between the cylinder body 2 and the switching outer cylinder 41 via the first annular seal 51 and the second annular seal 52. can be suppressed.

Generally, when forming a cylindrical member by injection molding, a very slight slope (draft angle) is sometimes applied to the inner periphery so that the mold that determines the inner periphery shape of the cylindrical member can be easily removed. In the present embodiment, it is preferable that the slope of the outer circumferentially tapered pedestal portion is steeper than the draft angle (larger inclination angle).

Specifically, in the cylindrical body 2 of this embodiment, a draft angle may be provided on the inner periphery of the portion where the mixing section 3 is arranged inside. In such a case, the angle of inclination of the outer periphery of the tapered pedestal and the angle of inclination of the inner periphery of the portion of the cylinder 2 in which the switching valve 4 is arranged are such that the mixing part 3 is located inside the cylinder 2. It is preferable to set the inclination angle to be larger than the inclination angle of the inner periphery of the portion where the inclination is arranged, for example, it is preferable to set it to 2 degrees or more. As a result, when inserting the switching valve 4 into the cylinder body 2, the first annular seal 51 and the second annular seal 52 bite into the opening edge of the second discharge port 24 on the inner peripheral surface of the cylinder body 2. This can be reliably prevented and the ease of assembling the switching valve 4 equipped with the first annular seal 51 and the second annular seal 52 can be further improved. Note that in FIG. 2, the inclination angle of the tapered shape is exaggerated for the sake of explanation.

Moreover, when insertion of the switching valve 4 into the cylinder body 2 is completed, the first annular seal 51 and the second annular seal 52 can be firmly compressed by the cylinder body 2 and the switching valve 4. Therefore, according to the hot water mixing faucet 1 of this embodiment, when the switching valve 4 is inserted into the cylinder body 2, the first annular seal 51 and the second annular seal 52 are difficult to be turned over, making it easy to create an appropriate seal structure. The switching valve 4 equipped with the first annular seal 51 and the second annular seal 52 can be easily assembled into the inner cylinder 2. In addition, in the switching valve 4, the outer periphery of the pedestal part of the switching outer cylinder 41 in which the first seal groove 41d and the second seal groove 41e are formed is tapered so that the first annular seal 51 and the second annular seal 52 are inclined. If so, the outer peripheral shape of the other portions may be a tapered shape or a straight shape (outer diameter is constant).

In addition, in the hot water mixing faucet 1 of the present embodiment, the outer circumferential surface of the switching outer cylinder 41 is located in the guide path 41c, and the inner circumferential surface of the cylinder body 2 and the outer circumferential surface of the switching outer cylinder 41 are connected to each other. A first protrusion 61, a second protrusion 62, and a third protrusion 63 that are brought into contact are provided.

The first protrusion 61 is formed relatively long in the direction of the central axis L0 of the cylinder 2, and is located between the first annular seal 51 and the second annular seal 52 in the circumferential direction on the front end side in the insertion direction in the central axis L0. It is arranged approximately at the circumferential center of the formed guide path 41c. The second protrusion 62 is located in the same phase in the circumferential direction of the first protrusion 61 and the switching outer cylinder 41, and is located closer to the proximal end than the first protrusion 61 in the insertion direction. The third protrusion 63 is positioned in the same phase in the circumferential direction of the first annular seal 51 and the switching outer cylinder 41 and is spaced apart from the second protrusion 62 in the circumferential direction of the switching outer cylinder 41. has been done. On the outer circumferential surface of the switching outer cylinder 41, a second protrusion 62 and a third protrusion 63 are arranged at intervals in the circumferential direction so as to divide the guide path 41c at equal intervals in the circumferential direction. There is.

Here, if the guide path 41c is formed widely on the circumferential surface of the switching outer cylinder 41 in order to secure the amount of water, the contact area between the cylinder body 2 and the switching outer cylinder 41 is small, and the first annular seal 51 and the second annular seal 52 Due to the elastic force, the switching outer cylinder 41 is eccentric to the side where the first annular seal 51 and the second annular seal 52 are not present with respect to the cylinder 2, and the first annular seal 51 and the second annular seal 52 are switched to the cylinder 2. There is a possibility that it will not be properly compressed with the outer cylinder 41. If the first annular seal 51 and the second annular seal 52 are not properly compressed, the water in the guide path 41c may unintentionally mix with the hot water discharged from the first discharge port 23 or the second discharge port 24, and the water may not be properly compressed. You will not be able to adjust the temperature properly.

According to the hot water mixing faucet 1 of the present embodiment, even if the guide path 41c is formed wide to ensure the amount of water, the cylindrical body 2 Since the switching outer cylinder 41 can be firmly in contact with the switching outer cylinder 41, the eccentricity of the switching outer cylinder 41 with respect to the cylinder body 2 can be suppressed and the first annular seal 51 and the second annular seal 52 can be appropriately compressed. It is possible to prevent the water in the passage 41c from unintentionally mixing with the hot water discharged from the first discharge port 23 and the second discharge port 24.

In addition, in this embodiment, the guide path 41c, the first protrusion 61, the second protrusion 62, and the third protrusion 63 are provided on the outer peripheral surface of the switching outer cylinder 41, but in the present invention, , a guide path and a protrusion may be formed on the inner circumferential surface of the cylindrical body 2. However, it is easier to manufacture a hot water mixing faucet by providing a guide path and a protrusion on the outer circumferential surface of the switching outer cylinder. Further, the position, number, size, and shape of the protrusions can be changed as appropriate, and the protrusions may be omitted if the annular seal can be appropriately compressed.

Furthermore, in the present embodiment, the outer circumferential surface of the switching outer cylinder 41 and the inner circumferential surface of the cylinder 2, which face the outer circumferential surface of the switching outer cylinder 41, are tapered and conical. However, the present invention is not limited to this, and in the hot water mixing faucet of the present invention, the first discharge port and the second discharge port are arranged in the circumferential direction, and the first discharge port and the second discharge port are arranged at the same position in the central axis direction of the cylinder body 2. A discharge port is arranged, or the discharge port is located between the hot water supply port and the water supply port, and a guide path is provided to guide water from the water supply port to the mixing part located on the hot water supply port side. In the present invention, an inclined surface may be provided so that the first annular seal and the second annular seal are arranged at an angle. Therefore, for example, the inner peripheral surface of the cylinder 2 and the outer peripheral surface of the switching outer cylinder 41 may be pyramid-shaped or wedge-shaped.

1 Hot water mixing faucet 2 Cylindrical body 21 Hot water supply port 22 Water supply port 23 First discharge port 24 Second discharge port 3 Mixing part 3a Knob part 4 Switching valve 41 Switching outer cylinder 41a First communication hole 41b Second communication hole 41c Guide path 41d First seal groove 41e Second seal groove 42 Switching inner cylinder 42a First selection hole 42b Second selection hole 42c Knob 43 O-ring 51 First annular seal 52 Second annular seal 61 First protrusion 62 Second protrusion 63 Third protrusion L0 center axis

Claims (3)

A hot water mixing faucet,
A cylinder and
a hot water supply port that penetrates from the outer peripheral surface of the cylindrical body to the inner peripheral surface and guides hot water into the cylindrical body;
a water supply port that penetrates from the outer peripheral surface of the cylinder to the inner peripheral surface and guides water into the cylinder;
a mixing unit disposed in the cylindrical body and mixing hot water in a temperature-adjustable manner;
a first discharge port that penetrates from the inner circumferential surface to the outer circumferential surface of the cylindrical body and is capable of discharging hot water discharged from the mixing section;
a second discharge port that penetrates from the inner circumferential surface to the outer circumferential surface of the cylindrical body and is capable of discharging hot water discharged from the mixing section;
a switching valve inserted into the cylindrical body and capable of freely selecting between the first discharge port and the second discharge port;
The switching valve includes a switching outer cylinder and a switching inner cylinder rotatably disposed within the switching outer cylinder,
A guide path for guiding water led from the water supply port to the mixing part is provided between the cylinder body and the switching outer cylinder,
The switching outer cylinder includes a first communication hole communicating with the first discharge port and a second communication hole communicating with the second discharge port,
The switching inner cylinder is rotatably arranged with respect to the switching outer cylinder, and has a selection hole that can freely select either the first communication hole or the second communication hole by rotating the switching inner cylinder. Equipped with
A first annular seal is provided between the cylindrical body and the switching outer cylinder and is liquid-tightly closed to prevent hot water flowing between the first communication hole and the first discharge port from leaking into the guide path. , a second annular seal that fluid-tightly closes the hot water flowing between the second communication hole and the second discharge port so that the hot water does not leak into the guide path;
The inner periphery of the cylindrical body is such that the first annular seal and the second annular seal gradually approach the central axis of the cylindrical body as they approach the front in the insertion direction of the switching valve into the cylindrical body. A hot water mixing faucet, characterized in that a surface and an outer circumferential surface of the switching outer cylinder are configured to be inclined. The hot water mixing faucet according to claim 1,
A hot water mixing faucet, characterized in that the guide path is provided with a protrusion that brings the inner circumferential surface of the cylinder into contact with the outer circumferential surface of the switching outer cylinder. The hot water mixing faucet according to claim 1 or 2,
The hot water mixing faucet, wherein the inclination angle of the first annular seal and the second annular seal is set to be larger than the draft angle of the inner circumferential surface of the cylindrical body, which is required when molding the cylindrical body. .

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