WO2021161667A1

WO2021161667A1 - Hot and cold water mixing faucet

Info

Publication number: WO2021161667A1
Application number: PCT/JP2020/048088
Authority: WO
Inventors: 拓麻川島; 功根岸; 善太丸山
Original assignee: 日本サーモスタット株式会社
Priority date: 2020-02-13
Filing date: 2020-12-23
Publication date: 2021-08-19
Also published as: CN114981576A; JP7353207B2; JP2021127800A

Abstract

Provided is a hot and cold water mixing faucet with which it is possible to easily form a suitable seal structure. A hot and cold water mixing faucet (1) comprises: a cylinder body (2); a hot water supply port (21); a cold water supply port (22); a mixing part (3); a first discharge port (23); a second discharge port (24); and a switching valve (4). The switching valve (4) includes a switching outer cylinder (41) and a switching inner cylinder (42). A guide path (41c) for guiding water guided from the cold water supply port (22) to the mixing part (3) is provided between the cylinder body (2) and the switching outer cylinder (41). The switching outer cylinder (41) includes a first communication hole (41a) and a second communication hole (41b), and the switching inner cylinder (42) includes a first selection hole (42a) and a second selection hole (42b). The inner peripheral surface of the cylinder body (2) and the outer peripheral surface of the switching outer cylinder (41) are configured to be inclined such that a first annular seal (51) and a second annular seal (52) provided between the cylinder body (2) and the switching outer cylinder (41) are disposed at an angle so as to gradually approach the center axial line of the cylinder body (2) in the direction in which the switching valve (4) is inserted into the cylinder body (2).

Description

Hot water mixing faucet

The present invention relates to a hot water mixing faucet.

Conventionally, a hot water mixing faucet capable of adjusting the mixing ratio of hot water and discharging it is known (see, for example, Patent Document 1). Hot and cold water mixing faucets are installed in kitchens and bathrooms of ordinary households, bathrooms and department stores of hotels, toilets in airports, and the like. Twice

In order to enhance the atmosphere of the various installation locations as well as the shape of the hot and cold water mixing faucet itself, it may be required to give a sense of quality. Twice

In addition, by molding the tubular body as a casing, there is a sufficient requirement for strength against excessive water pressure that occurs when water hammer occurs, and for durability against sudden temperature changes due to cold water and hot water. Meet. Twice

However, when the cylinder is molded, the cylinder has a built-in hot water mixing part, a switching valve for switching between the casing and the shower, and the inner peripheral surface of the cylinder is a hot water side passage, a water side passage, and a mixed hot water passage. Therefore, various machining is required inside the casing in order to secure the sealing property, incorporate the hot and cold water mixing part, and form the passage. Twice

For example, since it is not possible to secure the sealing property with the cast surface as it is, or it is not possible to incorporate the hot water mixing part or the like or form a uniform passage, a hole for storing the hot water mixing part or the like or an O-ring is arranged inside the cylinder. It requires cutting, turning, polishing, etc. of the grooves of. Twice

Machining such as cutting, turning, and polishing of holes and grooves can be easily performed on the outside of the cylinder, but inside the cylinder, the tools used may be restricted, or inside the cylinder. Since so-called deburring is required, special tools and complicated manufacturing processes are required. In other words, it had to go through complicated machining inside the cylinder. Twice

In addition, the mold-molded cylinder is heavier than it looks, and it is necessary to consider the weight when transporting, handling, and installing the cylinder. Further, since the casting has a small heat capacity and lacks heat insulation, if a hot water flow path is provided inside the cylinder, the temperature of the surface of the cylinder becomes partially high, which may be difficult to use. Therefore, there has been a demand for a design in which a mixing portion is installed at the inflow port of hot water so that the hot water is mixed with water at the same time as the hot water flows in without providing a hot water flow path in the cylinder. In order to meet such a demand, in Patent Document 1, the tubular body as the casing is made of resin.

Japanese Unexamined Patent Publication No. 6-294475

In the bathroom of a hot water mixing faucet using a tubular body as a casing for molding, the hot water supply port, the two discharge ports for currants and showers, and the water supply port are arranged in this order. Therefore, even when the cylinder as the casing is made of resin, it is necessary to arrange the hot water supply port, the discharge port, and the water supply port in this order in order to facilitate the replacement work with the existing molded product. In this case, it is necessary to provide a guide path for guiding the water to the hot water supply port side where the mixing portion is arranged. At this time, it is necessary to seal between the cylinder 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 curan or the shower. Twice

However, when trying to seal the two discharge ports of the curan and the shower port, which are arranged at intervals in the circumferential direction of the cylinder, the two annular portions surround the discharge ports on the peripheral surface of the cylinder. The seals should be placed at intervals in the circumferential direction. Twice

Here, in a seal structure using a general O-ring, since it is arranged along the circumferential direction on the outer circumference of the switching valve, a step portion is formed between the axial directions of the two seal members to form a seal ring. By shortening the press-fitting distance between the cylinder and the switching valve, the seal member is prevented from being rolled up at the time of insertion. Twice

However, when the seal member is arranged on the peripheral surface of the cylinder so as to surround the discharge port so as not to block the flow of water passing through the guide path, insert a switching valve with the seal member inside the cylinder. In this case, the press-fitting distance becomes long, and the seal member may be twisted, rolled up, or the seal member may be damaged, and the sealability of the seal member may be deteriorated. There is a problem that the attachment is deteriorated. Twice

In view of the above points, it is an object of the present invention to provide a hot water mixing faucet capable of improving the assembling property of a switching valve equipped with a seal member.

[1] In order to achieve the above object, the present invention is a hot water mixing faucet (for example, the hot water mixing faucet 1 of the embodiment; the same applies hereinafter) and a tubular body (for example, the tubular body 2 of the embodiment). The same applies hereinafter), and the hot water supply port (for example, the hot water supply port 21 of the embodiment; the same applies hereinafter) that penetrates from the outer peripheral surface to the inner peripheral surface of the cylinder and guides hot water into the cylinder, and the cylinder. A water supply port (for example, the water supply port 22 of the embodiment; the same applies hereinafter) that penetrates from the outer peripheral surface to the inner peripheral surface and guides water into the cylinder, and is arranged in the cylinder to heat hot water. An adjustable mixing unit (for example, the mixing unit 3 of the embodiment; the same applies hereinafter) and a first unit capable of discharging hot water discharged from the mixing unit through the inner peripheral surface to the outer peripheral surface of the cylinder. A discharge port (for example, the first discharge port 23 of the embodiment; the same applies hereinafter) and a second discharge port (for example, a second discharge port that penetrates from the inner peripheral surface to the outer peripheral surface of the cylinder and can discharge hot water discharged from the mixing portion). For example, the second discharge port 24 of the embodiment; the same applies hereinafter) and a switching valve (for example, the switching valve of the embodiment) that is inserted into the cylinder and can select the first discharge port and the second discharge port. 4. The switching valve is provided with a switching outer cylinder (for example, the switching outer cylinder 41 of the embodiment; the same applies hereinafter) and a switching inner cylinder rotatably arranged in the switching outer cylinder. (For example, the switching inner cylinder 42 of the embodiment; the same applies hereinafter) is provided, and a guide path for guiding the water guided from the water supply port to the mixing portion between the cylinder body and the switching outer cylinder. (For example, the guide path 41c of the embodiment; the same applies hereinafter) is provided, and 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 communicating with the second discharge port (for example, the second communication hole 41b of the embodiment; the same shall apply hereinafter), and the switching inner cylinder rotates with respect to the switching outer cylinder. A selection hole (for example, the first selection hole 42a, second A selection hole 42b; the same applies hereinafter) is provided so that hot water flowing between the first communication hole and the first discharge port does not leak to the guide path between the cylinder body and the switching outer cylinder. A first annular seal (for example, the first annular seal 51 of the embodiment; the same applies hereinafter) and hot water flowing between the second communication hole and the second discharge port flow into the guide path. A second annular seal (for example, the second annular seal 52 of the embodiment; the same applies hereinafter) that is tightly closed so as not to leak. The first annular seal and the second annular seal gradually have a central axis of the cylinder (for example, the central axis L0 of the embodiment) with respect to the insertion direction of the switching valve into the cylinder. Same below. ), The inner peripheral surface of the cylinder and the outer peripheral surface of the switching outer cylinder are inclined so as to be arranged so as to approach. Twice

According to the present invention, the inner circumference of the cylinder so that the first annular seal and the second annular seal gradually approach the central axis of the cylinder as they approach the tip in the insertion direction of the switching valve into the cylinder. Since the surface and the outer peripheral surface of the switching outer cylinder are inclined, when the switching valve is inserted into the cylinder, at the start of insertion, the first annular seal between the cylinder and the switching outer cylinder and The frictional force via the second annular seal can be suppressed. Twice

Then, when the insertion of the switching valve into the cylinder is completed, the first annular seal and the second annular seal can be firmly compressed by the cylinder 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 less likely to be rolled up, an appropriate seal structure can be easily formed, and a seal member is attached. It is possible to improve the assemblability of the switching valve. Twice

[2] Further, in the present invention, the protrusions (for example, the

first protrusions

61 and 61 of the embodiment) that bring the inner peripheral surface of the cylinder into contact with the outer peripheral surface of the switching outer cylinder are brought into contact with the guide path. It is preferable to provide the two protrusions 62 and the third protrusion 63; the same applies hereinafter). Twice

Here, when the guide path is widely formed to secure the amount of water, the contact portion between the cylinder and the switching outer cylinder is small, and the switching outer cylinder is eccentric with respect to the cylinder due to the elastic force of the first annular seal and the second annular seal. However, there is a risk that the first annular seal and the second annular seal may not be properly compressed between the cylinder body and the switching outer cylinder. If the first annular seal and the second annular seal are not properly compressed, the water in the guideway is unintentionally mixed with the hot water discharged from the first discharge port and the second discharge port, and the temperature is adjusted appropriately at the mixing portion. The temperature of the mixed water will drop. Twice

According to the present invention, even if the guide path is widened to secure the amount of water, the cylinder body and the switching outer cylinder can be firmly in contact with each other through the protrusions, so that the first annular seal and the second annular seal Can be appropriately compressed, and it is possible to prevent the water in the guide path from being unintentionally mixed with the hot water discharged from the first discharge port and the second discharge port. Twice

[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 of the inner peripheral surface of the tubular body required for molding the tubular body. It is preferable to have. According to the present invention, it is possible to further improve the assemblability of the switching valve equipped with the seal member.

Explanatory drawing which shows typically the hot water mixing faucet of embodiment of the invention. The cross-sectional view which shows typically the switching valve of this embodiment. The explanatory view which shows the 1st communication hole and the 2nd communication hole of the hot water mixing faucet of 1st Example of this Embodiment. The explanatory view which shows one side surface of the switching outer cylinder of 1st Example. The explanatory view which shows one side surface of the switching outer cylinder of 1st Example. Explanatory drawing which shows the switching outer cylinder of 1st Example from the direction of a central axis. Explanatory drawing which shows the cross section which cut | cut the switching outer cylinder of 1st Example by the line VII-VII of FIG.

The hot water mixing faucet of the embodiment of the present invention will be described with reference to the figure. FIG. 1 schematically shows the hot water mixing faucet 1 of the present embodiment. The hot water mixing faucet 1 of the present embodiment has a cylindrical cylindrical body 2 made of resin and a compression amount of a temperature-sensitive spring (not shown) which is arranged in the tubular body 2 and whose spring constant changes depending on the temperature. It is provided with a mixing portion 3 that allows the temperature to be adjusted by changing the mixing ratio of hot and cold water by adjusting (initial load, initial deflection) with the knob portion 3a, and a switching valve 4 inserted in the cylinder 2. In the mixing section 3, hot water and water individually enter from the outer circumference to the inside, and the hot water and water are mixed inside the mixing section 3. The mixed water mixed in the mixing unit 3 is supplied to the inside of the switching valve 4 (switching inner cylinder described later). In the mixing section 3, a thermoelement using wax may be used instead of the temperature-sensitive spring for temperature sensing, and the configuration of the mixing section 3 may be adjusted to an appropriate temperature by mixing hot and cold water. Twice

The tubular body 2 has a hot water supply port 21 penetrating from the outer peripheral surface to the inner peripheral surface of the tubular body 2 and an outer circumference of the tubular body 2 having a distance in the extending direction of the central axis L0 of the tubular body 2 from the hot water supply port 21. A water supply port 22 penetrating from the surface to the inner peripheral surface, and a first discharge port 23 arranged between the hot water supply port 21 and the water supply port 22 and penetrating downward from the inner peripheral surface of the tubular body 2 to the outer peripheral surface. A second discharge port 24 is provided, which is displaced in the circumferential direction with respect to the first discharge port 23 and penetrates from the inner peripheral surface to the outer peripheral surface of the tubular body 2 toward the rear side. Twice

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 unit 3 is discharged from the first discharge port 23 and the second discharge port 24. A curan (not shown) is connected to the first discharge port 23, and a shower (not shown) is connected to the second discharge port 24. Twice

With reference to the schematic view of FIG. 2, the switching valve 4 is made of a resin switching outer cylinder 41 which is arranged in a cylinder 2 so as not to rotate, and a metal which is rotatably arranged in the switching outer cylinder 41. Alternatively, it is provided with a resin switching inner cylinder 42. The switching outer cylinder 41 has a first communication hole 41a (FIG. 3) penetrating from the inner peripheral surface to the outer peripheral surface and a distance from the first communication hole 41a in the central axis L0 direction of the cylinder 2 and the cylinder 2 A second communication hole 41b that penetrates from the inner peripheral surface to the outer peripheral surface is provided so that there is a gap in the circumferential direction of the above.

Here, as the resin used as the material of the cylinder 2 and the switching outer cylinder 41, plastic or the like having excellent heat resistance, dust resistance, chemical resistance, flame resistance, etc. can be used. A plastic having a strength of about 50 MPa or more, an impact strength of about 50 J / m or more, and a thermal deformation 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), polyallylate (PAR), polyetherimide (PEI), polysulfone (PSF), Polyethersulfone (PES), polyetherketone (PEK), polyetheretherketone (PEEK), polyimide (PI), polyamideimide (PAI), fluororesin, liquid crystal plastic, thermal curing with excellent impact resistance and chemical resistance Sexual resin, glass fiber resin and the like can be used. Twice

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

The switching inner cylinder 42 has a first communication position in which 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. The water stop position where the communication between the first communication hole 41a and the first communication hole 41a is blocked and the communication between the second selection hole 42b and the second communication hole 41b is also blocked, and the first selection hole 42a and the first communication hole 41a. Communication is blocked, and the second selection hole 42b and the second communication hole 41b can be switched to three positions, that is, the second communication position. Twice

As will be described later, since 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, the switching valve 4 is a switching inner cylinder. By rotating the 42 with respect to the switching outer cylinder 41, the first discharge port 23 and the second discharge port 24 can be freely selected. Twice

Between the switching outer cylinder 41 and the switching inner cylinder 42, a plurality of O-rings 43 for preventing water entering from the guide path 41c from mixing with the mixed water discharged from the first selection hole 42a or the second selection hole 42b. Is provided. The seal structure by the O-ring 43 is not limited to that shown in FIG. 2, and can be changed as appropriate. Twice

3 to 7 show a first embodiment of the switching outer cylinder 41 of the present embodiment. With reference to FIGS. 3 to 7, the outer peripheral surface of the switching outer cylinder 41 extends toward the mixing portion 3 while being recessed so as to guide the water flowing into the cylinder 2 from the water supply port 22 to the mixing portion 3. A guide path 41c formed in the above direction is provided. Twice

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

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

Further, the annular seal of the present embodiment is a deformed seal other than a circular seal, but it may be a circular seal, and the shape can be changed as appropriate. Further, the first annular seal 51 and the second annular seal 52 need only be formed with two rings so as to separate the first communication hole 41a and the second communication hole 41b. Therefore, for example, the first annular seal The 51 and the second annular seal 52 may be connected at the outer circumference. Twice

The first annular seal 51 and the second annular seal 52 are fitted into the first seal groove 41d and the 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 2 toward the front side in the insertion direction in which the switching valve 4 is inserted into the cylinder 2. It has a tapered shape. In the following description, the central axis L0 may be appropriately described with the front end side in the switching valve 4 insertion direction as the tip end side and the side opposite to the tip end side as the base end side. Twice

The first seal groove 41d and the second seal groove 41e are formed at a constant depth on 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 are inclined so as to approach the central axis L0 toward the front side in the insertion direction as a whole. Twice

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

As a result, when the switching valve 4 is inserted into the tubular body 2, the frictional force between the tubular body 2 and the switching outer cylinder 41 via the first annular seal 51 and the second annular seal 52 at the start of insertion Can be suppressed. Twice

Generally, when a tubular member is formed by injection molding, a very slight gradient (pulling gradient) may be provided on the inner circumference so that the mold that determines the inner peripheral shape of the tubular member can be easily cut out. In the present embodiment, the slope of the pedestal portion having a tapered outer circumference is preferably steeper than the draft slope (the inclination angle is large). Twice

Specifically, in the tubular body 2 of the present embodiment, a draft may be provided on the inner circumference of the portion where the mixing portion 3 is arranged inside. In such a case, the inclination angle of the outer periphery of the tapered pedestal portion and the inclination angle of the inner circumference of the portion where the switching valve 4 is arranged inside in the cylinder 2 are the inclination angles of the mixing portion 3 inward in the cylinder 2. It is preferable to set it larger than the inclination angle of the inner circumference of the portion where is arranged, for example, it is preferable to set it to 2 degrees or more. As a result, when the switching valve 4 is inserted into the tubular 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 tubular body 2. This can be reliably prevented, and the assembling property of the switching valve 4 equipped with the first annular seal 51 and the second annular seal 52 can be further improved. In FIG. 2, the inclination angle of the tapered shape is exaggerated for the sake of explanation. Twice

Further, when the insertion of the switching valve 4 into the tubular body 2 is completed, the first annular seal 51 and the second annular seal 52 can be firmly compressed by the tubular body 2 and the switching valve 4. Therefore, according to the hot and cold water mixing faucet 1 of the present embodiment, the first annular seal 51 and the second annular seal 52 are less likely to be rolled up when the switching valve 4 is inserted into the tubular body 2, and an appropriate sealing structure can be easily achieved. It is possible to improve the assemblability of the switching valve 4 equipped with the first annular seal 51 and the second annular seal 52 to the inner cylinder 2. In the switching valve 4, the outer circumference of the pedestal portion 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 portion may be a tapered shape or a straight shape (constant outer diameter). Twice

Further, in the hot water mixing faucet 1 of the present embodiment, on the outer peripheral surface of the switching outer cylinder 41, the inner peripheral surface of the cylinder 2 and the outer peripheral surface of the switching outer cylinder 41 are positioned at the guide path 41c. The first protrusion 61, the second protrusion 62, and the third protrusion 63 to be brought into contact with each other are provided. Twice

The first protrusion 61 is formed relatively long in the central axis L0 direction of the tubular body 2, and is between the circumferential direction of the first annular seal 51 and the second annular seal 52 on the central axis L0 in the insertion direction. It is arranged substantially in the center of the formed guide path 41c in the circumferential direction. The second protrusion 62 is positioned 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 base end side in the insertion direction than the first protrusion 61. 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 arranged with a gap in the circumferential direction of the switching outer cylinder 41 with respect to the second protrusion 62. Has been done. On the outer peripheral surface of the switching outer cylinder 41, the second protrusion 62 and the 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. Twice

Here, when the guide path 41c is widely formed on the peripheral surface of the switching outer cylinder 41 in order to secure the amount of water, the contact portion between the cylinder 2 and the switching outer cylinder 41 is small, and the first annular seal 51 and the second annular seal 52 are formed. The outer cylinder 41 is eccentric to the side where the first annular seal 51 and the second annular seal 52 do not exist, and the first annular seal 51 and the second annular seal 52 are switched to the tubular body 2. There is a risk 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 is unintentionally mixed with the hot water discharged from the first discharge port 23 and the second discharge port 24, which is appropriate. It becomes impossible to adjust the temperature. Twice

According to the hot water mixing faucet 1 of the present embodiment, even if the guide path 41c is widely formed in order to secure the amount of water, the tubular body 2 is passed through the first protrusion 61, the second protrusion 62, and the third protrusion 63. And the switching outer cylinder 41 can be firmly in contact with each other, so that the eccentricity of the switching outer cylinder 41 with respect to the cylinder 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 road 41c from being unintentionally mixed with the hot water discharged from the first discharge port 23 and the second discharge port 24. Twice

In the present embodiment, the guide path 41c and 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, the guide path 41c is provided. , The guide path and the protrusion may be formed on the inner peripheral surface of the tubular body 2. However, it is easier to manufacture a hot water mixing faucet by providing a guide path and a protrusion on the outer peripheral surface of the switching outer cylinder. Further, the position, number, size, and shape of the protrusions can be appropriately changed, and the protrusions may be omitted if the annular seal can be appropriately compressed. Twice

Further, in the present embodiment, the outer peripheral surface of the switching outer cylinder 41 and the inner peripheral surface of the cylinder 2 facing the outer peripheral surface of the switching outer cylinder 41 have been described as having a tapered conical shape. Not limited to this, 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 located at the same position in the central axis direction of the cylinder 2. The 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 for guiding water from the water supply port is provided in the mixing portion arranged on the hot water supply port side. In the case of a thing, an inclined surface may be provided so that the first annular seal and the second annular seal are arranged in an inclined manner. Therefore, for example, the inner peripheral surface of the tubular body 2 and the outer peripheral surface of the switching outer cylinder 41 may have a pyramid shape or a wedge shape.

1 Hot water mixing faucet 2 Cylinder 21 Hot water supply port 22 Water supply port 23 1st discharge port 24 2nd discharge port 3 Mixing part 3a Picking part 4 Switching valve 41 Switching outer cylinder 41a 1st communication hole 41b 2nd communication hole 41c Guide path 41d 1st seal groove 41e 2nd seal groove 42 switching inner cylinder 42a 1st selection hole 42b 2nd selection hole 42c knob 43 O-ring 51 1st annular seal 52 2nd annular seal 61 1st protrusion 62 2nd protrusion 63 Third protrusion L0 Central axis

Claims

It is a hot and cold water mixing faucet
With the cylinder
A hot water supply port that penetrates from the outer peripheral surface to the inner peripheral surface of the cylinder and guides hot water into the cylinder.
A water supply port that penetrates from the outer peripheral surface to the inner peripheral surface of the tubular body and guides water into the tubular body.
A mixing section that is arranged inside the cylinder and mixes hot and cold water in a temperature-adjustable manner.
A first discharge port that penetrates from the inner peripheral surface to the outer peripheral surface of the cylinder and can discharge hot water discharged from the mixing portion, and
A second discharge port that penetrates from the inner peripheral surface to the outer peripheral surface of the cylinder and can discharge hot water discharged from the mixing portion, and
It is provided with a switching valve that is inserted into the cylinder and can select the first discharge port and the second discharge port.
The switching valve includes a switching outer cylinder and a switching inner cylinder rotatably arranged in the switching outer cylinder.
A guide path for guiding the water guided from the water supply port to the mixing portion is provided between the cylinder body and the switching outer cylinder.
The switching outer cylinder includes a first communication hole that communicates with the first discharge port and a second communication hole that communicates with the second discharge port.
The switching inner cylinder is rotatably arranged with respect to the switching outer cylinder, and a selection hole capable of selecting either the first communication hole or the second communication hole by rotating the switching inner cylinder. With,
Between the cylinder and the switching outer cylinder, there is a first annular seal that tightly closes the hot water flowing between the first communication hole and the first discharge port so as not to leak into the guide path. , A second annular seal that tightly closes the hot water flowing between the second communication hole and the second discharge port so as not to leak to the guide path is provided.
The inner circumference of the cylinder so that the first annular seal and the second annular seal gradually approach the central axis of the cylinder as they approach the tip of the switching valve in the insertion direction into the cylinder. A hot and cold water mixing faucet characterized in that a surface and an outer peripheral surface of the switching outer cylinder are inclined.
The hot and cold 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 peripheral surface of the tubular body into contact with the outer peripheral surface of the switching outer cylinder.
The hot water mixing faucet according to claim 1 or 2.
The hot and cold water mixing faucet is characterized in that the inclination angles of the first annular seal and the second annular seal are set to be larger than the draft of the inner peripheral surface of the tubular body required for molding the tubular body. ..