JP5442880B1 - Water purifier dedicated faucet - Google Patents

Abstract

[PROBLEMS] To ensure a sufficient time for releasing the residual pressure of raw water and / or purified water and completely prevent the purified water from dripping from the water outlet of the water purifier main body at the same time when the purified water is completely stopped.
In a switching valve cartridge 100, a raw water inlet communication recess 135L communicates a raw water inlet 125H and a raw water outlet extension recess at a first angular position of a rotation restricting portion 170, and a water purification port communication recess 137L. However, the purified water outlet 128H communicates with the purified water inlet extension recess, and at an intermediate angle position, the raw water inlet communication recess 135L releases the communication between the raw water inlet 125H and the raw water outlet extension recess, and the purified water inlet communication recess. 137L communicates the purified water outlet 128H with the purified water inlet extension recess, and the raw water inlet communication recess 135L maintains the released state of communication between the raw water inlet 125H and the raw water outlet extension recess at the second angular position. Then, the water purification port communication recess 137L releases the communication between the water purification outlet 128H and the water purification inlet extension recess.
[Selection] Figure 5

Description

  The present invention relates to a water purifier dedicated faucet that is fixedly disposed on an installation surface of a kitchen sink or the like, and in particular, includes a switching valve mechanism that uses a ceramic disk to make the overall configuration compact, The present invention relates to a faucet dedicated to a water purifier having a function of reliably preventing water from dripping from a spout sometimes (hereinafter referred to as “drip prevention function when water stops”).

[Conventional faucet for water purifier]
Conventionally, there is an undersink type water purifier as a water purifier that filters and purifies raw water (tap water) from a water supply source and discharges purified water. This under-sink type water purifier has a water purifier body with a water purifying function installed in the space below the sink, and a water faucet dedicated to a water purifier installed at a predetermined location on the sink (without the water purifying function, from the water purifier main body. The water purifier body is connected to the water faucet of the water purifier) by piping, and the raw water from the water supply source is purified with the water purification cartridge inside the water purifier body and then supplied to the water faucet. Discharge from the spout of the stopper. In addition, the water purifier dedicated faucet generally takes into consideration the possibility that an excessive load will be applied to the water purification cartridge etc. of the water purifier main body due to fluctuations in the water supply pressure etc. when raw water from the water supply source is directly supplied to the water purifier main body. Supply the raw water from the water supply source (instead of the water purifier main unit) to the raw water flow path inside the water purifier dedicated faucet, and supply or dewater the raw water through the internal flow path of the water purifier dedicated faucet. Is adjusted or pressure controlled (if necessary, constant flow rate) so that the water supply pressure is appropriate for the water purifier dedicated water faucet, and the raw water whose pressure has been adjusted or controlled from the water purifier dedicated water faucet After the raw water is purified inside the water purifier body, the purified water is supplied to the inside of the water purifier dedicated faucet and discharged from the spout at the tip of the water discharging pipe of the water purifier dedicated faucet. Yes.

[Piping structure and flow path structure]
For this reason, the undersink type water purifier dedicated faucet uses the primary (upstream) raw water pipe that supplies raw water from the water supply source to the interior of the water purifier dedicated faucet, and the raw water from the water purifier dedicated faucet. Three pipes (pipes) of a secondary side (downstream side) raw water pipe that supplies water to the water purifier main body and a water purification pipe that supplies purified water from the water purifier main body to the inside of the water purifier dedicated faucet are connected. In addition, the water purifier dedicated faucet is provided with a switching valve mechanism for performing a valve opening / closing operation and a flow path switching operation by rotating the handle, and corresponds to the piping structure composed of the three pipes. The primary side (upstream side) raw water flow path forming a flow path between the downstream end opening of the primary side raw water pipe and the switching valve mechanism, and between the switching valve mechanism and the upstream end opening of the secondary side raw water pipe Secondary (downstream) raw water flow path forming the flow path, primary side (upstream) purified water flow path forming the flow path between the downstream end opening of the purified water pipe and the switching valve mechanism, and the switching valve A total of four channels of secondary (downstream) water purification channels forming a channel between the mechanism and the upstream end opening of the water discharge pipe are provided.

[Main stop type water stop structure]
Here, when the water purifier dedicated water faucet is operated, the handle is rotated in the first direction, and the primary side raw water passage and the secondary side raw water passage are communicated with each other by the switching valve mechanism. At the same time, the primary side water purification channel and the secondary side water purification channel are communicated. On the other hand, when the water stop operation of the water purifier dedicated water faucet is performed, the handle is turned in a second direction opposite to the first direction, and the primary side raw water flow path and the secondary are turned by the switching valve mechanism. The communication with the side raw water channel is cut off, and the raw water from the primary side raw water pipe is stopped upstream of the secondary side raw water channel (that is, the raw water from the primary side raw water pipe flows into the secondary side raw water flow Block the communication between the water stop structure (so-called “main stop type water stop structure”) and the primary side water purification channel and the secondary side water purification channel, The raw water from the primary side raw water pipe is stopped upstream of the secondary side purified water flow path (that is, the raw water from the primary side raw water pipe flows to the water purifier main body through the secondary side raw water flow path. In addition, there is a water stop structure (so-called “stop-type water stop structure”). . However, in the first stop type water stop structure, since the water supply pressure is applied to the water purifier body not only during water flow but also at the time of water stoppage (that is, always), it is necessary to consider the pressure resistance structure of the water purifier body. For this reason, generally, a non-stop type water stop structure is often used.

[Problems of the water-stop structure with a base stop]
On the other hand, in the case of the original stop type water stop structure, when switching from the clean water discharge mode to the clean water stop mode, the switching between the primary side raw water flow path and the secondary side raw water flow path is blocked by the switching valve mechanism, The raw water from the side raw water pipe is stopped upstream of the secondary raw water flow path, but at this time, the downstream side of the switching valve mechanism (secondary raw water flow path, secondary side raw water inside the water purifier main body) Pipe, internal flow path of the water purifier body, water purification pipe, primary side water purification flow path, switching valve mechanism, secondary side water purification flow path, and a series of flow paths connected to the water discharge pipe, especially around the flow path inside the water purifier body Residual water (raw water and purified water) that remains or stays in the flow path) generates residual pressure due to water flow resistance inside the water purifier main body, and this residual pressure causes downstream pressure from the water stop position. The problem is that the accumulated water on the side drops from the spout at the end of the spout pipe. To have.

  Therefore, when adopting the main stop type water stop structure, it is necessary to prevent a problem that the staying water downstream from the water stop position dripping from the water discharge port at the tip of the water discharge pipe at the time of water stop. In the faucet including the water purifying function adopting the former water stop structure or the faucet dedicated to the water purifier, the invention described in Patent Document 1 (Utility Model Registration No. 2521538) is proposed as an invention that proposes to prevent such problems. There is an invention described in the invention and Patent Document 2 (Japanese Patent Laid-Open No. 2004-76557).

  Patent Document 1 aims to provide a composite faucet that can stop dripping from a faucet in a short time when the faucet is closed from a clean water discharge state (see “Invention” in the left column on page 2). See "Problems to be solved"). The device includes a first inlet connected to a water tap, a first outlet connected to an inlet-side pipe of a water purifier, a second inlet connected to an outlet-side pipe of a water purifier, and a discharge port. A first valve member having a second outlet connected to the pipe, and a pair of recesses that are attached in contact with the first valve member and are opposed to the contact surface side with the first valve member The first valve member has a first inlet and a second inlet facing each other, and the first outlet and the second outlet are The second valve member is disposed so as to face the first outlet at the water stop position, the second outlet at the second outlet, and the first valve member at the water purifier operating position. Communicates the first inlet and the first outlet, and the other recess communicates the second inlet and the second outlet. At the tap water discharge position, one recess is The first inlet and the second outlet are in communication with each other, and the other concave portion is in communication with the second inlet and the first outlet. The length of the two concave portions of the second valve member is asymmetric. When the second valve member is moved from the water purifier operation position to the water stop position, the above problem is solved by closing the first inlet earlier than the second inlet (left column on page 2). (See "Means for solving problems").

  Moreover, patent document 2 makes it a subject to provide the faucet for main stop type water purifiers which can reduce or prevent discharge of residual water, without impairing the advantage as a main stop type water purifier ("" (See “Challenges” in Summary). In the present invention, the faucet F1 includes a raw water flow path 21 whose both ends are connected to the raw water pipe P1, a purified water flow path 22 having one end connected to the purified water pipe P2 and a water outlet at the other end, and a raw water flow path. An on-off valve 31 and a purified water passage on-off valve 32 are provided. The raw water flow path opening / closing valve 31 and the purified water flow path opening / closing valve 32 have a dual opening / closing operation member 302. When the member 302 is closed, the raw water flow path opening / closing valve 31 first closes the raw water flow path 21, The purified water flow path opening / closing valve 32 is configured to close the purified water flow path 22 after allowing a sufficient amount of excess residual water pressure to escape (see “Solution” and “Summary” in “Summary”). See “Selection Chart.” The reference numerals in the above description indicate the reference numerals in “Summary” of Patent Document 2.)

Utility Model Registration No. 2521538 JP 2004-076557 A

[Ceramic disc valve]
In recent years, a switching valve mechanism using a ceramic disk (a combination of a fine ceramic movable disk and a fixed disk) can be used as a switching valve mechanism for a faucet because of the advantage that the entire mechanism can be made compact. The proposed Patent Document 1 and Patent Document 2 also disclose a switching valve mechanism using a ceramic disk.

[Disclosure of Patent Document 1]
First, if patent document 1 is demonstrated based on the indication of patent document 1 (all the code | symbols in description regarding the following patent document 1 show the code | symbol in the "Example" of patent document 1), the faucet 1 will be described. A first inlet 3 connected to the water supply pipe 2, a first outlet 5 connected to the inlet side pipe 4 of the water purifier, and a second inlet 7 connected to the outlet side pipe 6 of the water purifier The first valve member 10 having the second outlet 9 connected to the discharge pipe 8 and the first valve member 10 is attached in contact with the first valve member 10 and is in contact with the first valve member 10. In addition, a second valve member 13 having a pair of opposed recesses 11 and 12 formed thereon is attached to the faucet body 14 (see the second column, right column, lines 22 to 29). Further, as shown in FIG. 3, the first valve member 10 has a disc-like main body 10a made of plastic or ceramic, a first inlet 3, a first outlet 5, a second inlet 7, The four holes to be the outlets 9 are formed (see the second column, right column, lines 22 to 29). Further, as shown in FIG. 4, the second valve member 13 is formed by forming a pair of oval recesses 11 and 12 on one surface side of a disc-shaped main body 13a made of plastic or ceramics. (See page 11, left column, lines 11-13). Further, as shown in FIG. 4, the lower part of the other concave part 12 is extended from one concave part 11 so that the lengths of the two concave parts 11 and 12 are asymmetric, and the length of the other concave part 12 is It is longer than the recess 11. Thereby, when moving the 2nd valve member 10 from a water purifier operation position to a water stop position, the 1st inlet 3 is obstruct | occluded earlier than the 2nd inlet 7. FIG. (See above, page 3, left column, lines 18-24.) And according to Patent Document 1, in the water purifier composite faucet of this device, the second valve member is moved from the water purifier operating position to the water stopping position. When 13 is moved, both the supply of tap water to the water purifier C and the discharge of the purified water from the faucet are stopped almost at the same time, so that the high tap water pressure is not applied to the container of the water purifier C. The piping can be closed to stop the water. Thus, after stopping the water from the state where the purified water is discharged, it is possible to prevent the inconvenience of water dripping from the faucet for a while. In addition, when the length of the two recesses 11 and 12 of the second valve member 13 is asymmetrical and the second valve member 13 is moved from the water purifier operating position to the water stop position, the first inlet 3 is connected to the first inlet 3. Since it comprised so that it might block | close earlier than 2 inlet_port | entrance 7, the residual pressure in the water purifier at the time of a stopcock can be eliminated. (See above, page 3, right column, lines 19-30.)

[Problems of Patent Document 1]
However, as described above, the water faucet composite faucet described in Patent Document 1 is a ceramic disc-shaped first valve member 10 (corresponding to a fixed disk) and a second valve member 13 (corresponding to a movable disk). Are attached to the faucet body 14 in contact with each other. That is, when the 1st valve member 10 and the 2nd valve member 13 see the FIG. 1, each is a predetermined | prescribed attachment site | part (the side surface of the faucet body 14 from the side surface of the faucet body 14) as a separate part, In the internal space of the projecting cylindrical mounting part), a seal member or the like interposed between the outer peripheral surface of the first valve member 10 and the second valve member 13 and the inner peripheral surface of the mounting part ) It is inserted and held directly with respect to the attachment site by being closely fitted through a predetermined means. Here, the ceramic disks such as the first and second valve members 10 and 13 are consumables and cannot perform their intended functions due to wear or the like after a certain period of time. In the composite water faucet for water purifier, since the first and second valve members 10 and 13 are directly inserted and held in the attachment site, basically only the first and second valve members 10 and 13 are attached. If the first and second valve members 10 and 13 are difficult to replace and become unusable, basically, it is necessary to replace the entire water faucet composite faucet. There is room for significant improvement in terms of sex. (The present invention is economical due to the use of a cartridge)

  Moreover, in patent document 1, the 2nd valve member 13 is slightly longer than one recessed part 11 (as shown in FIG. 4) between the other recessed parts 12 among two recessed parts 11 and 12 (henceforth, For convenience of explanation, it is referred to as a “difference part”), and when the valve switching operation is performed from the water purifier operation state of FIG. 6 to the water stop state of FIG. When it comes to a position where it does not face the first inlet 3, which communicates with the water pipe 2, and the overlapping portion between the edge of the recess 11 on the first inlet 3 side and the peripheral edge of the first inlet 3 has completely disappeared (Hereinafter, for convenience of explanation, it is referred to as “first water stop angular position”.) In the second recess 7, a part of the edge on the second inlet 7 side (difference portion with the length of the one recess 11) is However, it is still in communication with a part of the second inlet 7 (which communicates with the outlet side pipe 6 of the water purifier) overlapping the inside of the water purifier. The purified water flows from the second inlet 7 of the first valve member 10 to the second outlet 9 of the first valve member 10 through the second recess 12 of the second valve member 13, and the second From the outlet 9 to the discharge pipe 8 and discharged from the tip of the pipe 8 so that the residual pressure in the second water purifier is released. And the 2nd valve member 13 further rotates toward the tap water discharge state shown in FIG. 8 from the water stop state shown in FIG. 7, and the edge of the 2nd inlet 7 side of the other recessed part 12 is shown. For the first time, the purified water in the water purifier is only when a part (the difference portion) and the overlapping portion of the second inlet 7 completely disappear (hereinafter referred to as “second water stop angle position” for convenience of explanation). Is completely water-stopped.

  Therefore, in Patent Document 1, while the second valve member 13 as the movable disk is rotated from the first water stop angle position to the second water stop angle position (that is, the angle portion or the length of the difference portion). The remaining pressure of the purified water from the water purifier is released in a very short time. Here, the rotation angle from the water purifier operation state of FIG. 6 to the water stop state (first water stop angle position) of FIG. 7 is 45 degrees (the third column, the left column, lines 44 to 48). The rotation angle from the water stop state (first water stop angle position) in FIG. 7 to the tap water discharge state in FIG. 8 is also 45 degrees (see page 3, right column, lines 11 to 18). See eye). Therefore, in order to ensure a sufficient rotation angle from the second water stop angle position to the tap water discharge state of FIG. 8, the rotation from the first water stop angle position to the second water stop angle position. The angle must be a rotation angle sufficiently smaller than the 45 degrees (that is, a slight angle corresponding to the difference portion), and within the time of the small rotation angle (in particular, the gripping member). When the rotation speed of the second valve member 13 by 19 is high), the residual pressure of the purified water from the water purifier may not be sufficiently released. For this reason, in Patent Document 1, as described above, when the second valve member 13 is moved from the water purifier operating position to the water stopping position, the tap water is supplied to the water purifier C and the water is discharged from the faucet. Both are designed to “stop almost at the same time”.

  On the other hand, in order to increase the rotation angle from the first water stop angle position to the second water stop angle position, the length (arc angle) of the second recess 12 of the second valve member 13 is further increased. Although it is necessary to enlarge, as shown in FIG. 4, the gap interval between the edge of the first recess 11 of the second valve member 13 and the opposite edge of the second recess 12 is limited, It is substantially difficult to significantly increase the length of the difference portion of the second recess 12, and in the water faucet composite water faucet of Patent Document 1, the second stop from the first water stop angle position. The rotation angle to the water angle position basically has to be a small rotation angle, and there is room for significant improvement in that the remaining pressure of the purified water from the water purifier is sufficiently released.

[Disclosure of Patent Document 2]
Next, Patent Document 2 will be described based on the disclosure of Patent Document 2 (the reference numerals in the following description regarding Patent Document 2 all indicate the reference numerals in the “embodiment of the invention” of Patent Document 2). As shown in FIGS. 21 and 22, in the switching valve mechanism of Patent Document 2, a fixed disk 653 and a movable disk 654 are used as the raw water flow path opening / closing valve, and a fixed disk 663 and a movable disk 664 are used as the purified water flow path opening / closing valve. The fixed disk 653 and the movable disk 654, and the fixed disk 663 and the movable disk 664 can be considered as a ceramic disk “made of plastic or ceramics” in Patent Document 1. The same fixed disk 653 and movable disk 654 and fixed disk 663 and movable disk 664 are also used in the embodiment of FIGS.

[Problems of Patent Document 2]
However, in Patent Document 2, a raw water flow path opening / closing valve unit 650 including a fixed disk 653 and a movable disk 654 and a purified water flow path opening / closing valve unit 660 including a fixed disk 663 and a movable disk 664 are required as a switching valve mechanism. In addition, there is a need for a drive gear mechanism (608 and the like) for synchronously rotating the movable disk 654 of the raw water flow path opening / closing valve unit 650 and the movable disk 664 of the purified water flow path opening / closing valve unit 660, As the overall structure becomes complicated, the number of parts becomes very large, and there is room for significant improvement in terms of cost. Further, in Patent Document 2, the raw water flow path opening / closing valve unit 650 requires a cylindrical casing 651 for housing the fixed disk 653 and the movable disk 654, and the purified water flow path opening / closing valve unit 660 is fixed disk 663. In addition, since the cylindrical casing 661 for housing the movable disk 664 is required, the number of parts is increased in this point as well, and there is room for improvement in terms of cost. (Reduced number of parts when unitized or cartridgeized)

[Request to cope with complication of piping structure and flow path structure and secure flow path diameter]
Here, as described above, three pipes of the primary-side raw water pipe, the secondary-side raw water pipe, and the purified water pipe are connected to the undersink type water purifier dedicated water faucet. Becomes complicated. In addition, the water purifier dedicated faucet has a primary side (upstream side) raw water flow path, a secondary side (downstream side) raw water flow path, a primary side (corresponding to the piping structure consisting of the above three pipes ( A total of four channels of the upstream side) water purification channel and the secondary side (downstream side) water purification channel forming the channel between the switching valve mechanism and the upstream end opening of the water discharge pipe are provided. Therefore, the flow path structure inside the water purifier dedicated faucet is also complicated. Further, due to the complexity of the piping structure and the flow path structure, it is not easy to secure a sufficient space for a total of four flow paths in the internal space of the water purifier dedicated faucet. Furthermore, in order to ensure the necessary flow rate for each of the total of four flow paths inside the water purifier dedicated water faucet, the diameter of each flow path needs to be sufficiently large. If you want to make the exterior of the water purifier's faucet slim or compact due to a design requirement, the space for securing the diameter of the internal flow path will be limited, and a total of 4 channels will be required. There remains a big challenge as to how to secure space. (Securing the flow path diameter when unitized or cartridgeized)

  Therefore, the present invention provides a water purifier dedicated faucet that employs a non-stop type water stop structure with sufficient time for releasing the residual pressure of raw water and / or purified water downstream from the raw water stop position by the switching valve mechanism. It is an object of the present invention to provide a water faucet dedicated to a water purifier that can completely prevent water from dripping from the water outlet of the water purifier main body at the same time when the water is completely stopped. In addition, according to the present invention, since the switching valve cartridge is a coverless type, the total number of parts of the switching valve mechanism can be reduced, the entire configuration can be simplified to reduce the manufacturing cost, and the number of parts can be reduced. The provision of a water purifier-equipped faucet that can sufficiently secure the flow rates of raw water and purified water by increasing the diameter of each flow path in the switching valve mechanism by utilizing the above is also an issue.

  The water purifier dedicated faucet according to the present invention includes a faucet body provided with a valve housing portion, a ceramic valve type switching valve cartridge that is detachably attached to the valve housing portion of the faucet body, and the switching valve cartridge. A water purifier-dedicated faucet provided with a valve mechanism operating member that is driven and connected and is operable to perform valve switching operation of the switching valve cartridge. The switching valve cartridge includes a holding part, a fixed disk, a movable disk, a driving part, and a rotation restricting part. The fixed disk is made of a fine ceramic fixed so as not to rotate relative to the holding portion. In addition, the movable disk is made of a fine ceramic that is disposed to face the fixed disk and is attached to the holding portion so as to be rotatable relative to the fixed disk in the forward and reverse rotation directions. Further, the driving unit drives and connects the movable disk and the valve mechanism operating member, and rotates in the forward / reverse rotation direction according to the operation of the valve mechanism operating member to rotate the movable disk in a corresponding forward / reverse direction. It has a rotation drive unit that can be driven to rotate in the direction. The rotation drive unit preferably includes a drive shaft, a drive unit side engagement unit including a drive connection unit that drives and connects the drive shaft and the movable disk, and transmits the rotational driving force of the drive shaft to the movable disk. Consists of Further, the rotation restricting portion (preferably interposed between the movable disk and the drive portion) is fixed so as not to be rotatable relative to the holding portion. The rotation restricting portion has a predetermined first angular position within a range in which the rotation driving portion can rotate in the positive rotation direction (preferably by abutting engagement with one side of the drive connecting portion of the rotation driving portion). And the rotation range of the rotation drive unit in the reverse rotation direction is set at a predetermined second angular position (preferably by abutting engagement with the other side of the drive connection unit of the rotation drive unit). The rotation angle range of the movable disk by the rotation drive unit is limited to a predetermined angle range between the first angular position and the second angular position. Further, the fixed disk includes a raw water inlet for raw water inflow, a raw water outlet for raw water outflow, a purified water inlet for purified water inflow, and a purified water outlet for purified water outflow in the circumferential direction at the same radial position. An arc-shaped grooved raw water outlet extension recess extending in a predetermined first angle range from the raw water outlet to an angular position in front of the raw water inlet in the circumferential direction, and arranged at a predetermined angular interval; In this embodiment, a circular groove-shaped purified water outlet extension recess extending in a predetermined second angle range from the purified water inlet to an angular position before the purified water outlet is formed. Further, the movable disk has an arc groove shape extending in a predetermined third angle range in the circumferential direction at the same radial position as the raw water outlet extension recessed portion of the fixed disk on a close contact surface which is a surface facing the fixed disk. A raw water inlet connecting recess that allows the raw water inlet of the fixed disk and the raw water outlet extended recess to communicate with each other, and a predetermined fourth circumferential direction at the same radial position as the raw water outlet extended recess of the fixed disk. An arc groove shape extending in the angle range is formed, and a water purification port communication concave portion is formed which allows the water purification outlet of the fixed disk to communicate with the water purification inlet extension concave portion. In the switching valve cartridge, at the first angular position of the rotation restricting portion, the raw water port communication concave portion of the movable disk communicates the raw water inlet and the raw water outlet extension concave portion of the fixed disk. And the water purification port communication recess of the movable disk communicates the purified water outlet and the purified water inlet extension recess of the fixed disk, and the first angle position and the second angle of the rotation restricting portion. The raw water port communication recess of the movable disc releases communication between the raw water inlet of the fixed disc and the raw water outlet extension concave portion, and communicates with the water purification port of the movable disc at an intermediate angle position between A recessed portion communicates the purified water outlet and the purified water inlet extended recessed portion of the fixed disk, and the raw water port communicating recessed portion of the movable disk is the fixed at the second angular position of the rotation restricting portion. Maintaining the released state of communication between the raw water inlet of the disk and the raw water outlet extension recess, and the water purification port communication recess of the movable disk includes the purified water outlet of the fixed disk and the purified water inlet extension recess The first angle range of the raw water inlet extension recess of the fixed disk and the second angle range of the purified water inlet extension recess of the fixed disk, and the first angle range of the raw water inlet communication recess of the movable disk so as to release the communication An angle range of 3 and a fourth angle range of the water purification port communication recess are set.

  The water purifier dedicated water faucet according to the present invention uses a ceramic disk for the switching valve mechanism to make the overall configuration compact, and as a switching valve cartridge in which the switching valve mechanism is made into a cartridge, the parts can be replaced when the ceramic disk is consumed. Possible and easy. In addition, by adopting a coverless type switching valve cartridge, the ceramic disk housing cover or housing, which is an essential component in conventional switching valve cartridges, is omitted, and the number of parts of the switching valve cartridge itself is reduced. The raw water flowing through each flow path by sufficiently increasing the diameter of the pair of flow paths for raw water and the pair of flow paths for water purification by omitting the cover or housing from the switching valve cartridge. The flow rate of purified water can be ensured to be sufficiently large. Furthermore, the water purifier dedicated water faucet according to the present invention has the best operational feeling for the user and the most suitable for the valve switching operation in consideration of the ergonomic viewpoint in the steering operation from the time of passing water to the time of stopping water. Within the range of an appropriate rotation angle, it is possible to reliably prevent the purified water from dripping from the water outlet at the time of shutoff. Furthermore, the water faucet for the water purifier according to the present invention can be operated from the time when the raw water is stopped in the switching valve mechanism (movable disk rotation angle position when the raw water is stopped) to the time when water is stopped (the movable disk is rotated when the water is stopped) Temporary clean water passage time for releasing the residual pressure of the purified water can be secured sufficiently within the angle range or time until the (angular position), and it stays in the flow path from the water purifier body to the water purifier dedicated faucet. The residual pressure of the accumulated water is completely released, and it is possible to completely prevent the purified water from dripping from the water outlet of the water purifier body at the time of water purification.

FIG. 1 is an exploded perspective view showing an internal configuration of a water purifier dedicated faucet according to Embodiment 1 of the present invention. FIG. 2 is a front view showing the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention. FIG. 3: shows the switching valve cartridge of the water purifier exclusive faucet which concerns on Embodiment 1 of this invention, (a) is a top view, (b) is a bottom view. FIG. 4 is an exploded perspective view showing the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention as viewed from above. FIG. 5 is an exploded perspective view showing the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention when viewed from below. FIG. 6 shows a ceramic disk constituting the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention, (a) is a plan view of the fixed disk, and (b) is a bottom view of the movable disk. It is. FIG. 7 is a cross-sectional view showing the overall configuration of the water purifier dedicated faucet according to Embodiment 1 of the present invention, and shows the flow path structure of the switching valve cartridge at the time of water discharge. FIG. 8 is a cross-sectional view showing the internal structure of the valve holder of the water purifier dedicated faucet according to Embodiment 1 of the present invention, and shows the flow path structure of the switching valve cartridge at the time of water discharge. FIG. 9 is an exploded perspective view schematically showing a flow path structure at a water discharging position of a ceramic disk (a fixed disk and a movable disk) constituting the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention. (A) is the flow path structure of raw water, and (b) is the flow path structure of purified water. FIG. 10 is a cross-sectional view showing the overall configuration of the water purifier-dedicated faucet according to Embodiment 1 of the present invention, and shows the flow path structure of the switching valve cartridge at the mid-water stop position. FIG. 11 is a cross-sectional view showing the internal structure of the valve holding portion of the water purifier dedicated faucet according to Embodiment 1 of the present invention, and shows the flow path structure of the switching valve cartridge at the mid-water stop position. FIG. 12 is an exploded perspective view schematically showing a flow path structure in the middle of water stoppage of the ceramic disk (fixed disk and movable disk) constituting the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention. It is a figure, (a) is a flow path structure of raw water, (b) is a flow path structure of purified water. FIG. 13 is a cross-sectional view showing the overall configuration of the water purifier-dedicated faucet according to Embodiment 1 of the present invention, and shows the flow path structure of the switching valve cartridge at the water stop position. FIG. 14 is a cross-sectional view showing the internal structure of the valve holder of the water purifier dedicated faucet according to Embodiment 1 of the present invention, and shows the flow path structure of the switching valve cartridge at the water stop position. FIG. 15 is an exploded perspective view schematically showing a flow path structure at a water stop position of a ceramic disk (fixed disk and movable disk) constituting the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention. (A) is a flow path structure of raw water, and (b) is a flow path structure of purified water. FIG. 16 shows a ceramic disk (fixed disk and movable disk) constituting the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention, and (a) is a plan view and a bottom view of the movable disk. , (B) are a plan view and a bottom view of the fixed disk. FIG. 17 is a plan view showing the ceramic disk constituting the selector valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention in an exploded manner (and a fixed disk and a movable disk arranged in parallel). , (A) shows the position at the time of water discharge, (b) shows the position at the middle of water stop, and (c) shows the position at the time of water stop. FIG. 18 is a plan view showing a flow path structure of a ceramic disk (a state in which a fixed disk and a movable disk are overlapped) constituting the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention, a) is a water discharge position, (b) is a water stop middle position, and (c) is a water stop position. FIG. 19 is a plan view showing the relationship of the flow path structure when the residual pressure of the ceramic disk (fixed disk and movable disk) constituting the selector valve cartridge of the water purifier dedicated faucet according to Embodiment 1 of the present invention is released. (A) is when the raw water is completely stopped, (b) is when the purified water is completely stopped, and (c) is the residual pressure release angle range. FIG. 20 is an exploded perspective view showing the switching valve cartridge of the water purifier dedicated faucet according to the second embodiment of the present invention as viewed from above. FIG. 21 is an exploded perspective view showing the switching valve cartridge of the water purifier dedicated faucet according to Embodiment 2 of the present invention when viewed from below.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as embodiments) will be described. Throughout each embodiment, the same members, elements, or parts are denoted by the same reference numerals, and the description thereof is omitted. Here, the water purifier-dedicated faucet of the present invention is, roughly, a faucet body, a switching valve mechanism built in the faucet body, a handle attached to the faucet body and operating the switching valve mechanism, (Undersink type) water faucet for water purifier. The faucet body includes a raw water inlet into which raw water flows, a raw water flow path for guiding the raw water flowing in from the raw water inlet to the switching valve mechanism, and raw water flowing in from the raw water inlet. Raw water outlet that feeds and supplies water to the external water purifier body, purified water inlet that receives purified water from the external water purifier body, and purified water outlet that discharges purified water that flows from the purified water inlet Including. Further, the valve mechanism forms a first flow path that connects the raw water inlet and the raw water outlet by valve operation of the handle, and the purified water inlet and the purified water outlet (spout). Valve operation state (water discharge state) that forms a second flow path that communicates with the first flow path, and a second valve operation state that closes the first flow path and forms only the second flow path It is switchable between the (raw water still water state) and the third valve operation state (raw water / purified water still water state) for closing the first and second flow paths, and the first valve operation state. The second valve operation state is achieved by rotating the handle position from about 45 degrees (about 45 degrees), and further rotating operation (about 45 degrees) from the handle position in the second valve operation state is performed. The third valve operating state is set. Thus, the water purifier dedicated water faucet of the present invention passes through the second valve operation state (raw water stoppage state) from the first valve operation state (water discharge state) to the third valve operation state (raw water / The water between the raw water outlet and the purified water outlet at the time of stopping water is released, and the water purifier is damaged by the water pressure or from the purified water outlet (water outlet). Water leaks can be prevented. Hereinafter, the water purifier dedicated faucet of the embodiment will be described in detail.

Embodiment 1
[Water faucet body]
The water purifier-dedicated faucet according to Embodiment 1 of the present invention is a faucet that does not have a raw water spouting function but has only a purified water spouting function, and as shown in FIG. Cylindrical faucet bodies 10 and 20 are provided. The faucet body has a two-part structure (two-piece structure) consisting of a base 10 and a pipe holder 20, and as shown in FIG. 6, the pipe holder 20 is detachably connected to the base 10 by fitting or the like. Then, they are arranged concentrically (coaxially) and integrated in a watertight manner. Specifically, the base 10 has a cylindrical portion 11 having a substantially frustoconical shape or a bottle-shaped outer shape. More specifically, as shown in FIG. 7, the cylindrical portion 11 has a cylindrical shape with a circular cross section and a diameter that is curvilinearly reduced toward the upper end. The lower end of the internal space of the cylindrical portion 11 is shielded by a disc-shaped bottom wall 12, and a disc-shaped insertion portion 13 is integrally formed concentrically on the lower surface of the bottom wall 12. A total of three pipe joint holes 14H, 16H, and 17H are formed at predetermined angular positions on the outer peripheral side of the insertion portion 13. These three pipe joint holes 14H, 16H, and 17H are used to join and detachably fix the tips of three ordinary pipes for an undersink type water purifier dedicated water faucet. Each has a small-diameter screw hole shape having an inner diameter corresponding to the outer diameter of the pipe. Specifically, the pipe joint hole 14H is joined to the leading end (downstream end) of the primary raw water pipe for raw water input, and the pipe joint hole 16H is the base end (upstream end) of the secondary raw water pipe for raw water discharge. ), And the tip (downstream end) of the purified water pipe for purified water entry is joined to the pipe joining hole 17H. Furthermore, one screw hole-like fixing hole 14 </ b> T is formed at a predetermined angular position on the outer peripheral side of the insertion portion 13. The three pipe joining holes 14H, 16H, and 17H and the one fixing hole 14T are on the same circumference on the outer peripheral side of the insertion portion 13 (that is, at the same distance from the center of the insertion portion 13). ) At a predetermined angular interval (for example, an interval of 90 degrees). Then, the insertion portion 13 is fitted into a circular recess-shaped attachment portion (not shown) provided at the installation site of the water purifier dedicated faucet (for example, a predetermined position of the sink top plate), and the insertion portion 13 is fixed. By screwing a screw into the hole 14T and fastening it, the water purifier water faucet is attached and fixed to the installation site via the insertion portion 13.

  As shown in FIG. 7, the pipe holding portion 20 includes a cylindrical portion 21 having a substantially frustum-shaped outer shape that smoothly continues to the substantially frustum shape of the base portion 10. A cylindrical insertion portion 22 having an outer diameter smaller than the outer diameter of the lower end of the pipe holding portion is integrally formed at the lower end portion of the cylindrical portion 21. And the base 10 and the pipe holding | maintenance part 20 are integrated watertightly by inserting the insertion part 22 in the circular opening formed in the upper end of the base 10 via an O-ring. Further, the water discharge pipe 30 is inserted into a bent cylindrical pipe portion 31 and a long cylindrical shape that is integrally fixed to the proximal end of the pipe portion 31 and extends concentrically (having a smaller diameter than the pipe portion 31). A landing portion 32 and a water conditioning portion 33 mounted inside the tip opening (water outlet) of the pipe portion 31 are provided. The insertion part 32 of the water discharge pipe 30 is inserted into the insertion hole 21P of the cylinder part 21 of the pipe holding part 20 and closely fitted, and the outer peripheral surface of the lower end part of the insertion part 32 and the insertion hole 21P of the cylinder part 21 are inserted. By attaching an O-ring between the corresponding positions, the water discharge pipe 30 is integrated with the pipe holding portion 20 in a watertight manner. Thereby, the purified water from the internal space of the base portion 10 passes through the water flow holes 32P of the insertion portion 32 and is discharged from the water outlet at the tip of the pipe portion 31.

[Accommodating structure for switching valve mechanism]
An explanation will be given of the housing structure for the switching valve cartridge 100 of the switching valve mechanism, which is one of the main features of the present invention. As shown in FIG. A valve holding portion 40 for accommodating and holding the switching valve cartridge 100 as a switching valve mechanism is integrally formed or fixed integrally with the (side portion). Specifically, the valve holding portion 40 is formed by integrally forming a reduced diameter portion 41 and a fitting portion 42. More specifically, the reduced-diameter portion 41 has a substantially short frustum-shaped outer shape, protrudes from the cylindrical portion 11 substantially orthogonally to the side, has a circular cross section, and is curvilinearly reduced toward the tip. It has a cylindrical shape with a diameter. The fitting portion 42 has a cylindrical shape slightly smaller in diameter than the distal end opening of the reduced diameter portion 41 and protrudes concentrically from the distal end of the reduced diameter portion 41. A female screw 42 a is threaded on the inner peripheral surface of the fitting portion 42. As shown in FIGS. 6 and 7, the switching valve cartridge 100 is accommodated and held in the internal space VS of the valve holding portion 40 from the front end opening of the fitting portion 42.

  On the other hand, as shown in FIG. 7, a partition wall 15 for forming a flow path is vertically formed in the internal space of the cylindrical portion 11 of the base portion 10. The partition wall 15 extends so that the internal space of the cylinder portion 11 faces the entire proximal end opening of the valve holding portion 40. Then, when the switching valve cartridge 100 is inserted and accommodated from the opening at the front end of the valve holding portion 40, the front end of the switching valve cartridge 100 (exposed surface of the packing 140 described later) comes into contact with and closely contacts the opposing surface of the partition wall 15. In addition, further movement of the switching valve cartridge 100 in the insertion direction is restricted and prevented. The accommodation / holding structure of the switching valve cartridge 100 further includes a fastening portion 50. The fastening portion 50 includes a hexagonal ring-shaped engaging portion 51 and a circular ring-shaped male screw portion 52 integrally formed concentrically with the engaging portion 51, and the switching valve cartridge 100 is attached to the valve holding portion 40. In the state where the male screw portion 52 of the fastening portion 50 is inserted and accommodated, the male screw portion 52 of the fastening portion 50 is screwed into the female screw 42a of the fitting portion 42 and fastened, whereby the inner end surface of the fastening portion 50 (the tip of the male screw portion 52). The surface) is in contact with the base end surface of the switching valve cartridge 100 so that the switching valve cartridge 100 is held at a predetermined position in the valve holding portion 40 so as not to be movable in the axial direction. ing.

[Flow path structure in the faucet body]
As shown in FIG. 8, the partition wall 15 in the faucet body divides the internal space of the cylinder part 11 into three in the horizontal cross-sectional direction, and the internal space of the cylinder part 11 is connected to the pipe joint hole 14H. A raw water inflow passage 15P, which is a small space communicating with each other, a raw water outflow passage 16P, which is a small space communicating with the pipe joint hole 16H, and a purified water inflow passage which is a small space communicating with the pipe joint hole 17H It is divided into 17P. Further, as shown in FIG. 7, in the internal space of the cylindrical portion 11, a partition wall 18 extends horizontally at a position slightly below the upper end portion of the partition wall 15, and is slightly below the upper end portion of the partition wall 15. The upper end of the raw water inflow passage 15P of the partition wall 15 is shielded at the position. Further, at a predetermined position above the partition wall 15, the raw water inflow passage 15 </ b> P and a raw water inflow passage of the switching valve cartridge 100 in the valve accommodating portion 40 (more precisely, a raw water inlet 115 of the holding portion 110 described later) 15C of raw | natural water inflow holes which connect these are formed. Further, at a predetermined position above the partition wall 18 of the partition wall 15, a purified water outflow path (more precisely, a purified water outlet 118 of the holding unit 110 described later) of the switching valve cartridge 100 in the valve housing 40 is provided. A purified water outflow hole 18C is formed. On the other hand, as shown in FIG. 8, in the partition wall 15, the portions closer to the valve accommodating portion 40 than the raw water outflow passage 16 </ b> P and the purified water inflow passage 17 </ b> P are respectively provided in the raw water outflow passage 16 </ b> P and the valve accommodating portion 40. A raw water outflow hole 16C communicating with the raw water outflow path of the switching valve cartridge 100 (more precisely, a raw water outflow outlet 116 of the holding section 110 described later) is formed, and the purified water inflow path 17P and the valve accommodating section 40 A purified water inflow hole 17 </ b> C is formed to communicate with the purified water inflow passage (more precisely, the purified water inlet 117 of the holding unit 110 described later) of the switching valve cartridge 100.

[Handle 60]
As shown in FIG. 1, a handle 60 is attached to the fitting portion 42 of the valve housing portion 40 so as to be rotatable in the forward and reverse rotation directions. Specifically, the handle 60 includes a cylindrical rotating portion 61, a gripping portion 62 integrally formed so as to extend perpendicular to a predetermined angular position of the outer peripheral surface of the rotating portion, and one end (outside of the rotating portion 61). End) and a cap 63 attached to the opening. 7 and 8, when the switching valve cartridge 100 is housed and held in the valve housing portion 40, a square (details are shown in FIGS. 2 to 5) on the proximal end side of the switching valve cartridge 100 is shown. A columnar drive shaft 154 protrudes by a predetermined length from the tip of the fastening portion 50 screwed to the fitting portion 42. A concentric circular protrusion-shaped engaging portion 64 is integrally formed at the center of the inner bottom surface of the handle 60, and has the same contour as the outer contour (square) of the drive shaft 154 at the center of the engaging portion 64. An engagement hole (not shown) having a square cross section is formed. When the handle 60 is attached to the valve accommodating portion 40, the tip end portion of the drive shaft 154 protruding from the valve accommodating portion 40 is fitted into the engaging hole of the engaging portion 64 so as not to be relatively rotatable. It has become so. Further, as shown in FIGS. 3 and 4, a female screw 154 </ b> T is formed in the center of the front end surface of the drive shaft 154 so as to extend in the axial direction, and the drive shaft 154 is engaged with the engaging portion 64 of the handle 60. In the held state, the male screw 65 is screwed into the female screw 154T of the drive shaft 154 through the communication hole formed at the center of the engaging portion 64, whereby the handle 60 is connected to the valve housing portion 40 via the drive shaft 154. It is fixed so that it cannot be removed and pivoted. At this time, the cap 63 of the handle 60 is removed from the rotating portion 61, and after the handle 60 is screwed to the drive shaft 154, the cap 63 is attached to the rotating portion 61, and the male screw 65 or the like. Is shielded from the outside. In the present embodiment, the handle 60 constitutes a valve mechanism operating member that is drivingly connected to the switching valve cartridge 100 and is operable to switch the switching valve cartridge 100. The switching valve cartridge 100 performs a predetermined switching valve operation via the drive shaft 154 in accordance with the rotation operation of the handle 60 as the valve mechanism operating member. The valve mechanism operating member of the present invention may employ a configuration other than the handle 60 described above.

[Switching valve cartridge]
Next, a detailed configuration of the switching valve cartridge 100 will be described. As shown in FIGS. 4 to 5, the switching valve cartridge 100 includes a holding unit 110, a fixed disk 120, a movable disk 130, a packing 140, a driving unit 150, a fitting part. It is composed of a combination ring 160 and a rotation restricting portion 170, and these switching valve mechanism parts are integrated into a cartridge. In addition, the switching valve cartridge 100 of the present embodiment is a so-called ceramic valve type switching device including a fine ceramic fixed disk and a movable disk obtained by firing and ceramicizing a fine ceramic material such as alumina (aluminum oxide). Although the valve mechanism is adopted, the housing such as the cover and housing that house the mechanism parts such as the fixed disk and the movable disk is omitted like the conventional ceramic valve type switching valve cartridge. It is configured as a (coverless type) switching valve cartridge. Here, the conventional cover has a watertight housing structure in which mechanical parts such as a fixed disk and a movable disk are housed in a watertight manner, and restricts the rotation range of the movable disk with respect to the fixed disk within a predetermined angle range. In order to implement a coverless type switching valve cartridge, the conventional cover is replaced with a watertight housing structure (particularly with a fixed disk). It is necessary to provide a watertight structure (with respect to the movable disk) and a rotation restricting structure in place of the rotation restricting portion of the conventional cover. Although the switching valve cartridge of the present embodiment is a coverless type, it is realized as a characteristic switching valve cartridge having such a watertight structure and a rotation restricting structure. Has a configuration based on completely different ideas and idea realizing means, and exhibits unique operational effects that are significantly different from those of conventional switching valve cartridges. Therefore, the water purifier dedicated water faucet according to the present invention is greatly different from the conventional water purifier dedicated water faucet even in the configuration in which the switching valve cartridge is a coverless type, and such characteristic coverless type switching is performed. As an invention provided with a valve cartridge, the invention can also be applied to a faucet other than a water purifier dedicated faucet. Hereinafter, the detailed structure of the switching valve cartridge having the coverless type will be described.

[Holding part]
The holding part 110 can be preferably an integrally formed body made of a corrosion-resistant metal such as brass, and includes a base part 111 having a disk shape with a predetermined diameter as shown in FIG. At the center of one side surface of the base portion 111 (the side surface on the handle 60 side when the switching valve cartridge 100 is mounted on the valve housing portion 40), support rods 112 and 113 are erected in the axial direction so as to be integrally formed or integrated. It is fixed to. The support bar includes a support portion 112 having a columnar shape with a predetermined diameter, and a locking portion 113 integrally formed with the support portion 112 so as to extend concentrically from the tip of the support portion 112. The locking portion 113 has a rounded quadrangular prism shape with chamfered corners having a square cross section that is substantially inscribed in a circular shape that is the cross section of the support portion 112, and the locking portion 113 is concentric with the support portion 112. It extends in the axial direction. A female screw 113T is formed at the center of the front end surface of the locking portion 113 so as to extend in the axial direction. Further, a pair of engaging protrusions 114 each having a rectangular plate shape with a predetermined thickness are formed on the outer peripheral surface of the base end portion of the support portion 112 at an angle of 180 degrees in the circumferential direction.

  As shown in FIG. 5, in the vicinity of the outer peripheral portion of the other side surface of the base portion 111, an interval of a certain angle (90 degrees in the illustrated example) is provided in the circumferential direction (a total of four water outlets). ) A raw water inlet 115, a raw water outlet 116, a purified water inlet 117, and a purified water outlet 118 are formed. The raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 are arranged at the same distance from the center of the base portion 111 in the radial direction. That is, the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 are arranged on the same circumference in the vicinity of the outer peripheral portion of the base portion 111. Further, the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 are small cylinders having the same predetermined diameter (although they may be different diameters), respectively (see FIG. 6). And a small cylindrical shape having an outer diameter substantially the same as or slightly smaller than the inner diameter of the raw water inflow hole 15C, the raw water outflow hole 16C, the purified water inflow hole 17C, and the purified water outflow hole 18C inside the faucet body. ing. Further, a positioning protrusion 119 is integrally formed at a position near the outer peripheral portion of the other side surface of the base portion 111 so as to protrude perpendicularly from the other side surface of the base portion. The positioning projection 119 has a substantially cylindrical shape with a small diameter. For example, the positioning projection 119 may be arranged on the same circumference where the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 are arranged. However, they may be arranged at different positions.

  Furthermore, as shown in FIG. 4, the base portion 111 has cylindrical through holes having the same diameter as the inner diameters of the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118, respectively. The inside from one side of the base portion 111 in the thickness direction (the axial direction of each of the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118, which is parallel to the central axis of the base portion 111. ) And open in a circular shape (having the same diameter as the inner diameter of the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118) on the other side surface of the base portion 111, and the raw water inlet hole 115H. The raw water outflow hole 116H, the purified water inflow hole 117H, and the purified water outflow hole 118H. That is, the holding unit 110 has a raw water inflow hole 115H on one side surface of the base unit 111, a raw water through the openings of the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 on the other side surface of the base unit 111. A cylindrical water flow hole communicating with the openings of the outflow hole 116H, the purified water inflow hole 117H, and the purified water outflow hole 118H is provided. As will be described later, the holding unit 110 fixes the fixed disk 120 so as not to be relatively rotatable, and disposes the movable disk 130 so as to face the fixed disk 120, and in the forward and reverse rotation directions with respect to the fixed disk 120. It is mounted so as to be relatively rotatable, and exhibits the same disk holding function as the cover of the conventional cover type switching valve cartridge, but unlike the cover of the conventional cover type switching valve cartridge, the fixed disk 120 And a non-casing type member that does not surround the periphery of the movable disk 130 or the like.

[Packing]
As shown in FIG. 5, the packing 140 is integrally formed of a rubber material or a resin material for a general sealing member, and has a thin disk shape having the same outer diameter as the outer diameter of the base portion 111 of the holding portion 110. The base portion 141 is provided. The base portion 141 has a raw water inlet hole 145 that is a circular hole having substantially the same diameter as the outer diameters of the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 of the holding unit 110. A raw water outlet hole 146, a purified water inlet hole 147, and a purified water outlet hole 148 are formed. The base portion 141 is formed with a positioning projection hole 149 that is a small circular hole having a diameter substantially the same as the outer diameter of the positioning projection 119 of the holding unit 110. The raw water inlet hole 145, the raw water outlet hole 146, the purified water inlet hole 147, the purified water outlet hole 148, and the positioning protrusion hole 149 are arranged on the outer periphery side of the base portion 141. The raw water inlet 115, the raw water outlet 116, the purified water inlet 117, the purified water outlet 118, and the positioning protrusion 119 are formed at positions facing and aligned with each other. The raw water inlet hole 145, the raw water outlet hole 146, the purified water inlet hole 147, the purified water outlet hole 148, and the positioning protrusion hole 149 of the packing 140 and the positioning protrusion hole 149 are respectively supplied to the raw water inlet of the holding unit 110. 115, the raw water outlet 116, the purified water inlet 117, the purified water outlet 118, and the positioning protrusion 119 are inserted so that the packing 140 is attached to the other side of the holding part 110, and the water tightness on the other side of the holding part 110 is reduced. To maintain. When the switching valve cartridge 100 can maintain the water tightness on the other side surface of the holding portion 110 by a member other than the packing 140 (for example, the other member facing the holding portion 110 has a structure for ensuring water tightness). The packing 140 can be omitted.

[Fixed disk]
The fixed disk 120 is integrally formed by molding and sintering from a ceramic material (alumina or the like) similar to the ceramic disk of a general ceramic valve. As shown in FIGS. 4 and 5, the base part 111 of the holding part 110 is formed. The base part 121 which makes | forms the disk shape which has the same outer diameter as this is provided. A support rod insertion hole 122 is formed in the center of the base portion 121 so as to penetrate in the axial direction. The support rod insertion hole 122 includes an engagement hole 122 a corresponding to the engagement portion 113 of the support rod of the holding portion 110 and a pair of engagement holes 122 b corresponding to the pair of engagement protrusions 114 of the holding portion 110. . Specifically, the locking hole 122a of the support rod insertion hole 122 of the fixed disk 120 has a circular cross section having the same diameter as the outer diameter of the locking portion 113 of the holding portion 110 and extending in the entire axial direction. The pair of engagement holes 122b of the support rod insertion hole 122 of the fixed disk 120 are formed on the outer periphery of the locking hole 122a at an angle of 180 degrees in the circumferential direction. It has the same cross-sectional shape as 114 rectangular plate-like cross-sectional shapes. After the support rods 112 and 113 of the holding portion 110 are inserted into the support rod insertion holes 122 of the fixed disk 120, the support portions 112 are inserted into the locking holes 122 a of the support rod insertion holes 122 in a loosely inserted state. The locking portion 113 is fitted into the locking hole 122a of the support rod insertion hole 122 (preferably fitted in a close-fitting state), and the pair of engaging projections 114 of the holding portion 110 is supported by the support rod insertion hole 122. Thus, the fixed disk 120 is made non-rotatable relative to the holding portion 110 (by engagement between the engagement protrusion 114 and the engagement hole 122b). It is designed to be installed in a state.

  As shown in FIG. 5, at predetermined positions in the vicinity of the outer peripheral portion of the other side surface of the base portion 121 (the surface facing the holding portion 110), there is a certain angle interval in the circumferential direction (total four running water A raw water inlet 125H, a raw water outlet 126H, a purified water inlet 127H, and a purified water outlet 128H are formed. The total four raw water inlets 125H, the raw water outlet 126H, the purified water inlet 127H, and the purified water outlet 128H of the fixed disk 120 are respectively the four raw water inlets 115, the raw water outlet 116, and the purified water stream of the holding unit 110. At the same radial position as the inlet 117 and the purified water outlet 118 (that is, at the same distance in the radial direction from the center of the base portion 121), the same constant angular interval in the circumferential direction (in the illustrated example, each The distance between the centers is 90 degrees). In addition, the raw water inlet 125H and the purified water outlet 128H of the fixed disk 120 are arranged at positions facing each other across the center of the base portion 121 (that is, with an interval of 180 degrees). The inner diameter of the water inlet 115 and the purified water outlet 118 (that is, the diameter of the raw water inlet hole 115H and the purified water outlet hole 118H) is a circular cross section having the same inner diameter and penetrates in the thickness direction from the other side of the fixed disk 120 to one side. ing. Therefore, the raw water inlet 125 </ b> H and the purified water outlet 128 </ b> H of the fixed disk 120 are cylindrical holes that open in a circular shape with the same diameter on one side surface and the other side surface in the thickness direction of the fixed disk 120, respectively. Further, the raw water outlet 126H and the purified water inlet 127H of the fixed disk 120 are arranged at positions facing each other across the center of the base portion 121 (that is, with an interval of 180 degrees). A cross-sectional circular shape having the same inner diameter as the inner diameter of the water outlet 116 and the purified water inlet 117 (that is, the diameter of the raw water outlet hole 116H and the purified water inlet hole 117H) penetrates in the thickness direction from the other side of the fixed disk 120 to one side. ing. Therefore, the raw water outlet 126H and the purified water inlet 127H of the fixed disk 120 are respectively cylindrical holes that open in a circular shape having the same diameter on one side surface in the thickness direction of the fixed disk 120. On the other side in the thickness direction of the fixed disk 120, a raw water outlet extension recess 126L and a purified water inlet extension recess 127L, which will be described later, are formed. The raw water outlet 126H and the purified water inlet 127H are respectively a raw water outlet extension recess 126L and a raw water outlet extension recess 126L. The purified water inlet extension recess 127 </ b> L is disposed at one end edge in the arc direction and opens at the one end edge. As a result, the raw water outlet 126 </ b> H and the purified water inlet 127 </ b> H are disposed on the other side in the thickness direction of the fixed disk 120. Is the middle of the base portion 121 in the thickness direction (the thickness of the raw water outlet extension recess 126L and the purified water inlet extension recess 127L). Or at an intermediate position) corresponding to the depth has a cylindrical bore which opens into a circle of the same diameter.

  On the other hand, as shown in FIG. 6 (a), at a predetermined position in the vicinity of the outer peripheral portion of one side surface of the base portion 121, an interval of a constant angle is provided in the circumferential direction (two fixed disk side outlets in total). A raw water outlet extension recess 126L and a purified water inlet extension recess 127L (as extension recesses) are respectively formed. The raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120 have arc lengths (arc angles α1, α2) and widths that extend along the circumferential direction of the base portion, respectively. It is formed in a long hole shape. The raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120 are respectively a raw water inlet 125H, a raw water outlet 126H, a purified water inlet 127H, and a purified water stream on one side surface in the thickness direction of the base 121. At the same radial position as the opening position of the outlet 128H (that is, at the same distance in the radial direction from the center of the base portion 121), a constant angular interval in the circumferential direction (in the illustrated example, the distance between the centers is 180). Are formed at intervals. Furthermore, the raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120 are formed to have the same arc length, and have the same width as the diameters of the raw water outlet 126H and the purified water inlet 127H. Is formed. Specifically, as shown in FIG. 6A, the raw water outlet extension recessed portion 126L of the fixed disk 120 has an arc length (arc) extending from a position completely overlapping with the raw water outlet 126H to a position near the raw water inlet 125H. The purified water inlet extended recess 127L has an arc length (arc angle α2) extending from a position completely overlapping the purified water inlet 127H to a position near the purified water outlet 128H, and the arc lengths thereof. The length (arc angle) is the same (α1 = α2). Note that the arc angles α1 and α2 of the raw water outlet extended recess 126L and the purified water inlet 127H of the fixed disk 120 are preferably a predetermined range of about 75 degrees to about 85 degrees in the circumferential direction of the base 121. The arc angle (more preferably, an arc angle of about 80 degrees) is the same arc angle (α1 = α2). In this case, the arc angles α3, α4 between the opposite end edges of the raw water outlet extended recess 126L of the fixed disk 120 and the purified water inlet 127H are within an angular range of about 105 degrees to about 95 degrees in the circumferential direction of the base portion 121. The predetermined arc angle (more preferably, an arc angle of about 100 degrees) is the same arc angle (α3 = α4). Thus, the raw water outlet extension recess 126L has an arc groove shape extending from the raw water outlet 126H to the angular position just before the raw water inlet 125H in the circumferential direction of the fixed disk 120, and the purified water outlet extension recess 127L is fixed. In the circumferential direction of the disk 120, an arc groove shape extending from the purified water inlet 127H to an angular position before the purified water outlet 128H is formed.

  More specifically, one edge of the raw water outlet extension recess 126L of the fixed disk 120 (an edge having a semicircular cross section on the side of the purified water outlet 128H) is a circular opening end on the other side of the raw water outlet 126H. Fully overlaps with half of the edge (opening edge having a semicircular cross section on the side of the purified water outlet 128H), and the other edge is slightly separated from the edge of the raw water inlet 125H (for example, less than the radius of the raw water inlet 125H) Are located close to each other. Similarly, one edge of the purified water inlet extension recess 127L of the fixed disk 120 (an edge having a semicircular cross section on the raw water inlet 125H side) is a circular opening edge on the other side of the purified water inlet 127H. It completely overlaps with the half (open edge of the semicircular cross section on the raw water inlet 125H side), and the other edge is slightly separated from the edge of the purified water outlet 128H (for example, a distance less than the radius of the purified water outlet 128H) ). The raw water outlet extension concave portion 126L and the purified water inlet extension concave portion 127L of the fixed disk 120 are located at positions facing each other across the center of the base portion 121 (that is, with an interval of 180 degrees between the centers). Symmetrical arrangement. Note that the raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120 each have a base that is about a fraction of the thickness of the base 121 (for example, a thickness of about 1/2). The groove 121 is a concave groove having a long circular arc shape that is recessed from one side surface to the other side surface.

  As a result, the raw water outlet 126H and the purified water inlet 127H of the fixed disk 120 open in a circular shape having the predetermined diameter on one side in the thickness direction of the fixed disk 120, respectively, and the other side in the thickness direction of the fixed disk 120 In the raw water outlet extension recess 126L and the purified water inlet extension recess 127L, a cylindrical hole that opens in a circular shape with the predetermined diameter is formed, and the penetration length of the raw water inlet 125H and the purified water outlet 128H Thus, the axial length is smaller by the thickness of the raw water outlet extension recess 126L and the purified water inlet extension recess 127L. For example, when the thickness of the raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120 is about ½ of the thickness of the base 121, the raw water outlet 126H and the purified water inlet 127H are the raw water inlet. The axial length is about 1/2 of 125H and the purified water outlet 128H.

  On one side of the fixed disk 120, a certain width (for example, about 1/10 or less of the thickness of the base portion 121) is slightly extended from the opening peripheral edge of the raw water inlet 125 </ b> H to the opening peripheral edge of the raw water outlet extending recess 126 </ b> L. In the same manner, a close-fitting portion 123 having a rim-shaped convex shape (with a width less than the radius of the raw water inlet 125H) is formed, and similarly, the opening peripheral edge of the purified water inlet extended recess 127L from the opening peripheral edge of the purified water outlet 128H. A close contact portion 124 is formed with a slight thickness (similar to the close contact portion 123) and having an edged convex shape with a predetermined width. The close contact portion 123 and the close contact portion 124 are each extended to the opening peripheral edge of the support rod insertion hole 122 of the base portion 121. Further, the surfaces of the intimate part 123 and the intimate part 124 (surfaces on the side in contact with the movable disk 130) are each formed into a flat surface with high smoothness by polishing (for example, lapping) (the movable disk 130). High water tightness and air tightness (in close contact with). For example, the surfaces of the close contact portion 123 and the close contact portion 124 of the fixed disk 120 are formed on flat surfaces with high smoothness having a predetermined surface roughness (Ra 0.2 μm or less) and flatness (0.3 μm or less), respectively. Yes.

[Movable disc]
The movable disk 130 is integrally formed by molding and sintering from the same material and forming method as the fixed disk 120, that is, from a ceramic material (such as alumina) similar to the ceramic disk of a general ceramic valve. As shown in FIG. 5, a disk-like base portion 131 having the same outer diameter as the outer diameter of the base portion 121 of the fixed disk 120 is provided. A support rod insertion hole 132 is formed in the center of the base portion 131 so as to penetrate in the axial direction. The support rod insertion hole 132 is a through hole having the same diameter as the locking hole 122 a of the support rod insertion hole 122 of the fixed disk 120, and has a circular cross section having the same diameter as the outer diameter of the locking portion 113 of the holding portion 110. It has a cylindrical shape extending in the whole axial direction. Then, the fixed disk 120 and the movable disk 130 are aligned and overlapped with each other, and the support portion 112 of the holding portion 110 is inserted into the support rod insertion hole 122 and the support rod insertion hole 132 that are coaxially aligned and fixed, and fixed. By locking the engaging hole 122b of the disk 120 by the locking part 113 of the holding part 110, the fixed disk 120 is closely aligned with the holding part 110 so as not to be relatively rotatable, and the movable disk 130 is aligned. The support portion 112 of the holding portion 110 is fitted into the support rod insertion hole 132 (preferably fitted in a close-fitting state), so that the movable disk 130 is in a state in which the movable disk 130 cannot rotate relative to the holding portion 110. And fixedly aligned with the fixed disk 120 attached in the forward and reverse rotation directions (clockwise and counterclockwise) It has become such that rotatable relative to. At this time, the length of the support portion 112 is set such that a predetermined length portion on the tip end side of the support portion 112 of the holding portion 110 protrudes from one side surface of the movable disk 130 (that is, the holding portion 110). It is set to be longer by the predetermined length than the total thickness of the fixed disk 120 and the movable disk 130 to be overlaid on each other).

  As shown in FIG. 4, one side surface of the base portion 131 (the surface opposite to the surface facing the fixed disk 120) is positioned opposite to each other across the center of the base portion 131 (that is, spaced by 180 degrees). The pair of fitting recesses 133 are formed in a symmetrical arrangement. The pair of fitting recesses 133 are in the shape of a recess having the same shape, and each has a circular plate-like recess-like space having a predetermined thickness extending to the outer peripheral edge of the other side surface of the base portion 131 by a predetermined angle range. .

  On the other hand, as shown in FIG. 5, at a predetermined position in the vicinity of the outer peripheral portion of the other side surface of the base portion 131, an interval of a constant angle is provided in the circumferential direction (a total of two movable disk side flow channel recesses The raw water inlet communication recess 135L and the water purification port communication recess 137L are respectively formed. As shown in FIG. 6 (b), the raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 are formed into arc long holes having different predetermined arc lengths (arc angles) and the same width, respectively. Is formed. Further, the raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 are formed to have the same width as the width of the raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120. On the other hand, the raw water port communication recess 135L of the movable disk 130 has the same arc length (arc angle β1) as the arc length (arc angle α1) of the raw water outlet extension recess 126L of the fixed disk 120 (α1 = β1). ), The purified water inlet communication recess 137L has an arc length (arc angle β2) larger than the arc length (arc angle α2) of the purified water inlet extension recess 127L (α2 <β2).

  As shown in FIG. 6B, the raw water inlet communication recess 135L of the movable disk 130 is extended along the circumferential direction of the base portion 131 by the first arc angle β1 in the circumferential direction of the base portion 131. At the same time, the water purification port communication recess 137L extends in the circumferential direction of the base portion 131 by a second arc angle β2 (greater than the first arc angle β1) in the circumferential direction of the base portion 131. In addition, the arc angle that is the angle range between one opposing edge of the raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 (the angle range between the opposing edges on the short distance side) is the base. A third arc angle β3 is set in the circumferential direction of the portion 131. Preferably, the first arc angle β1 of the raw water inlet communication recess 135L of the movable disk 130 is a predetermined arc angle within an angle range of about 75 degrees to about 85 degrees (more preferably, an arc angle of about 80 degrees). The second arc angle β2 of the water purification port communication recess 137L is a predetermined arc angle (more preferably about 120 degrees) within an angle range of about 125 degrees to about 115 degrees in the circumferential direction of the base portion 131. Arc angle). In addition, the third arc angle β3 between the opposite end edges of the raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 (preferably in an angle range smaller than the first arc angle β1). The predetermined arc angle is within an angle range of about 55 degrees to about 65 degrees (more preferably, an angle range of about 60 degrees). Note that the fourth arc angle β4 between the other opposing end edges of the raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 is preferably (preferably the first arc angle β1 and the second arc angle). A predetermined arc angle (more preferably, an arc angle of about 100 degrees) within a range of about 95 degrees to about 105 degrees (in the middle angle range of β2). Thus, the movable disk 130 has an arc groove shape extending in a predetermined angular range in the circumferential direction at the same radial position as the raw water outlet extension recess 126L of the fixed disk 120 on the close contact surface that is the surface facing the fixed disk 120. None, the raw water inlet connecting recess 135L that allows the raw water inlet 125H and the raw water outlet extending recess 126L of the fixed disk 120 to communicate with each other, and the raw water outlet extending recess 127L of the fixed disk 120 at a predetermined angle in the circumferential direction at the same radial position. A circular groove shape extending in a range is formed, and a purified water outlet connecting recess 137L is formed which allows the purified water outlet 128H of the fixed disk 120 and the purified water inlet extended recess 127L to communicate with each other.

  The raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 are respectively formed on the one side surface in the thickness direction of the base portion 121 of the fixed disk 120 in a state where the movable disk 130 is aligned with and overlapped with the fixed disk 120. The base portion 131 is positioned at the same radial position as the opening positions of the water inlet 125H, the raw water outlet 126H, the purified water inlet 127H, and the purified water outlet 128H (and the raw water outlet extended recess 126L and the purified water inlet extended recess 127L). At the same distance from the center in the radial direction, the circumferential angle is formed at the predetermined angular interval. That is, the raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120, and the raw water port connection recess 135L and the water purification port connection recess 137L of the movable disk 130 are the same from the center of the base part 121 and the base part 131. Having the same radius of curvature (extending concentric with the circumferential direction of the base portion 121 and the base portion 131) and extending by the respective arc angles α1, α2, β1, β2, and the same An arc groove shape having a width of Therefore, when the movable disk 130 is aligned with the fixed disk 120 and overlapped, and the movable disk 130 is rotated relative to the fixed disk 120, the raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 are The raw water outlet extension recess 126L and the purified water inlet extension recess 127L of the fixed disk 120 move in the circumferential direction on the same concentric circle, and the raw water outlet extension of the fixed disk 120 corresponds to the rotational angle position of each. A completely overlapping position that overlaps all of the recess 126L and the purified water inlet extension recess 127L, a partially overlapping position that partially overlaps, and a non-overlapping position that does not overlap at all can be selected. In addition, each of the raw water port communication recess 135L and the water purification port communication recess 137L of the movable disk 130 has a base portion 131 that is about a fraction of the thickness of the base portion 131 (for example, a thickness of about 1/2). It is a concave groove having an arc long hole shape that is recessed from the other side surface toward the one side surface. Note that the other side surface of the base portion 131 of the movable disk 130 is not formed with a rim-like convex portion like one side surface of the fixed disk 120, and the entire surface thereof is polished (for example, lapping) and has high smoothness. The flat surface of the fixed disk 120 exhibits high water-tightness and air-tightness (between the contact surface with the fixed disk 120) and maintains the water-tightness between the contact surfaces of the fixed disk 120 and the movable disk 130. Thus, water leakage to the outside from between the close surfaces is completely blocked (that is, the smoothness of the close surfaces of the fixed disk 120 and the movable disk 130 maintains water tightness between the close surfaces. Thus, the smoothness is set to be equal to or higher than the smoothness that completely blocks the leakage of water from between the close surfaces). For example, the surface of the other side surface that is the close contact surface of the movable disk 130 is formed as a flat surface having a high smoothness with a predetermined surface roughness (Ra 0.2 μm or less) and flatness (0.3 μm or less).

[Drive part]
The drive unit 150 can be preferably an integrally molded body made of a predetermined synthetic resin, and includes a base 151 having a disk shape with a predetermined diameter, as shown in FIGS. The diameter of the base portion 151 is a predetermined diameter smaller than the diameter of the base portion 131 of the movable disk 130. In addition, at the outer peripheral edge of the base portion 151, a pair that forms a protruding piece shape or a protruding flat plate shape in the axial direction at positions facing each other across the center of the base portion 151 (that is, with an interval of 180 degrees). The drive connecting portions 152 are formed symmetrically with each other. The pair of drive connecting portions 152 protrude in the thickness direction of the base portion 151 from the other side surface (the surface facing the movable disk 130) of the base portion 151, and extend in the circumferential direction of the base portion 131 over a predetermined arc angle range. It is a curved rectangular flat plate with the same shape extending. Further, the drive unit 150 is arranged to be opposed to the movable disk 130 with a rotation restricting unit 170 to be described later interposed therebetween. At this time, the front end portions of the pair of drive connecting units 152 are respectively The pair of fitting recesses 133 of the movable disk 130 are tightly fitted in a circular arc-plate-like recess-like space. That is, at least the tip of each drive connecting portion 152 has a plate shape having the same width as the fitting recess 133 of the movable disk 130 and has the same cross-sectional shape as the fitting recess 133 of the movable disk 130. In the width direction, it extends in a curved manner (with the same curvature) along the outer periphery of the base portion 151 by the same angular range as the extending angular range of the fitting recess 133 of the fixed disk 130. Further, as shown in FIG. 2, the projecting dimension of the drive connecting portion 152 from the other side surface of the base portion 151 is determined such that the drive portion 150 is disposed opposite to the movable disk 130 with the rotation restricting portion 170 interposed therebetween. When the leading end of the coupling portion 172 is brought into contact with the bottom surface of the fitting recess 133 of the movable disk 130, a dimension is formed so that a slight gap is formed between the driving portion 150, the rotation restricting portion 170, and the facing surface (ie The dimension is larger than the thickness of the disk-shaped portion of the movement restricting portion 170, and between one side surface of the base portion 171 of the rotation restricting portion 170 held with a gap on the movable disk 130 as will be described later. It is set to a dimension that forms a slight gap).

  On the other hand, a disc-shaped step portion 153 is integrally formed on one side surface of the base portion 151 with a slight gap from the outer periphery of the base portion 151, and at the center of the surface of the step portion 153 The shaft 154 is erected in the axial direction and is integrally formed or integrally fixed. More specifically, the drive shaft 154 has a base end portion formed in a disk-shaped portion having a slightly smaller diameter than the circular shape that is the outer shape of the stepped portion 153, and a main portion thereof substantially within the circular shape of the disk-shaped portion. It has a quadrangular prism shape with a square cross section in contact with it, and extends in the axial direction so as to be concentric with the stepped portion 153. A female screw 154T is formed at the center of the tip surface of the drive shaft 154 so as to extend in the axial direction. As described above, the drive connecting portion 152 of the drive portion 150 is freely engageable (and detachable) with the fitting recess 133 of the movable disc 130, and the drive portion 150 and the movable disc 130 are connected to each other so as not to rotate relative to each other. At the same time, the movable disk 130 can be rotated in the forward and reverse rotation directions by the drive unit 150. In other words, in the present embodiment, the drive unit 150 is drivingly connected between the movable disk 130 and the handle 60 by drivingly connecting the drive shaft 154 to the movable disk 130 by the drive connecting unit 152. In this embodiment, the drive shaft 154 and the drive connecting portion 152 of the drive unit 150 are driven in accordance with the rotation operation of the handle 60 in the forward / reverse rotation direction (the drive shaft 154 is rotated in the forward / reverse rotation direction). It constitutes a rotation drive unit for rotating the movable disk 130 in the corresponding forward / reverse rotation direction (via the coupling unit 152). In the present embodiment, the drive connecting portion 152 functions as a member or a part that drives and connects the drive shaft 154 to the movable disk 130 and transmits the rotational driving force of the drive shaft 152 to the movable disk 130. The rotation restricting portion 170 is in contact with and engaged with the engagement restricting portion 173 to restrict and prevent further rotation of the drive shaft 154, thereby limiting the turning angle range of the movable disk 130 within a predetermined angle range. Or it functions also as a drive part side engaging part to regulate.

[Mating ring]
The fitting ring 160 can be preferably an integrally molded body made of a predetermined synthetic resin, and includes a base portion 161 having a disk shape with a predetermined diameter, as shown in FIGS. The diameter of the base portion 161 is a predetermined diameter that is approximately the same as the diameter of the base portion 131 of the movable disk 130 (preferably the same). In addition, a circular fitting hole 162 having the same diameter as the outer diameter of the stepped portion 153 of the driving unit 150 is formed through the center portion of the base portion 161. Further, a pair of engaging recesses 163 are formed symmetrically on the outer peripheral edge of the base portion 161 at positions facing each other across the center of the base portion 161 (that is, at an interval of 180 degrees). ing. Each of the pair of engaging recesses 163 of the base portion 161 has a notch shape having the same shape, and the through recess having a substantially rectangular cross section extending the outer peripheral edge of the base portion 161 by a predetermined angle range. It has become. Furthermore, the end of the engaging recess 163 on one side surface of the base portion 161 is integrally formed so that a projecting piece-like hooking protrusion 164 protrudes outward slightly over the entire width direction. Has been. Therefore, the engaging recess 163 extends to the position of the latching protrusion 164 with the same cross-sectional shape (substantially rectangular cross-sectional shape) in the thickness direction of the base portion 161, and at the latching protrusion 164 portion, the latching protrusion 164. This is a through recess extending in a cross-sectional shape that is smaller by the protruding dimension. The fitting ring 160 is configured to be fitted and integrally coupled with the rotation restricting portion 170 with the drive portion 150 interposed therebetween (for details, see the description of the rotation restricting portion 170). Will be described in detail).

[Rotation restriction part]
The rotation restricting portion 170 can be preferably an integrally molded body made of a predetermined synthetic resin, and includes a base portion 171 having a disk shape with a predetermined diameter as shown in FIGS. 4 and 5. The diameter of the base portion 171 is a predetermined diameter that is approximately the same as (preferably the same as) the diameter of the base portion 151 of the driving unit 150. As shown in FIG. 4, a small hole 172 </ b> H having a small-diameter circular hole is formed at the center of one side surface of the base portion 171 (a side surface facing the drive unit 150) from one side surface of the base portion 171. A predetermined length is formed in the direction (up to the middle of the thickness of the base portion 171). Further, as shown in FIG. 5, a disc-shaped stepped portion 172 is integrally formed on the other side surface of the base portion 171 with a slight gap from the outer peripheral edge of the base portion 171. Further, at the center of the other side surface of the stepped portion 172 (the side surface facing the movable disk 130), a square columnar locking hole 172F is formed axially from the other side surface of the stepped portion 172 (on one side surface of the base portion 171). A predetermined length is formed (preferably, it is formed to the tip position of the small hole 172H and communicates with the small hole 172H). The locking hole 172F of the stepped portion 172 has a rectangular shape having the same cross-sectional shape as the cross-sectional shape of the locking portion 113 of the holding portion 110, and a predetermined length range of the distal end portion of the locking portion 113 can be closely fitted (and attached / detached). Is free). As a result, the locking portion 113 of the holding portion 110 can be fitted (and detachable) into the locking hole 172F of the rotation restricting portion 170, and the holding portion 110 and the rotation restricting portion 170 cannot rotate relative to each other. Can be connected to. Note that the axial length of the locking portion 113 of the holding portion 110 is a predetermined length of the distal end portion of the locking portion 113 in a state where the fixed disk 120 and the movable disk 130 are superimposed on the holding portion 110 as described above. The range is set to a length that protrudes from the other side surface of the movable disk 130, but the predetermined length range is set to a length that is larger by a predetermined length than the axial length of the locking hole 172F of the stepped portion 172. When the locking hole 172F of the rotation restricting portion 170 is inserted into the distal end portion of the locking portion 113 of the holding portion 110, the other side surface of the base portion 171 of the rotation restricting portion 170 and the base portion 131 of the movable disk 130 are included. A gap having a predetermined dimension (corresponding to a difference between the protruding length of the locking portion 113 and the axial length of the locking hole 172F) is formed between the one side surface and the other side surface.

  On the outer periphery of the stepped portion 172, at a position facing each other across the center of the stepped portion 172 (that is, with an interval of 180 degrees), a pair of restrictions that form a protruding piece shape or a protruding flat plate shape in the radial direction The projecting pieces 173 are formed so as to be symmetrical with each other. The pair of regulating protrusions 173 has a circular arc plate shape of the same shape that protrudes in the diameter direction from the outer peripheral surface of the stepped portion 172 and extends in the circumferential direction of the stepped portion 172 over a predetermined arc angle range. The pair of regulating protrusions 173 extends from the other side surface of the stepped portion 172 over one side surface of the base portion 171, and has an arc flat plate shape (or substantially fan-shaped flat plate shape) having a total thickness of the base portion 171 and the stepped portion 172. ). Further, both side surfaces in the arc direction of the restricting protrusions 173 become restricting surfaces 173R that contact the corresponding side surfaces in the width direction of the drive connecting portion 152 of the drive portion 150 to prevent further rotation of the drive portion 150. ing. On the other hand, on one side surface of the regulation protrusion 173 that is flush with one side surface of the base portion 171, a substantially flat locking claw 174 is provided in the central range of the outer peripheral edge portion, respectively. It protrudes in the vertical direction and is integrally formed. The locking claws 174 are symmetrically arranged at positions facing each other across the center of the base portion 171 (that is, with an interval of 180 degrees), and at a predetermined angle along the outer peripheral edge of the regulating protrusion 173. It is curved and extended in an arc shape in a range (an angle range smaller than the restricting protrusion 173). Further, claw-shaped claw portions 174C are integrally formed on the opposite side surfaces of the front end portions of the both locking claws 174 so as to protrude inward (in the direction toward the center of the base portion 171).

  The rotation restricting portion 170 is integrally connected to the fitting ring 160 with the driving portion 150 interposed therebetween. Specifically, as shown in FIG. 2, the protrusion dimension (vertical dimension in FIG. 2) of the locking claw 174 from one side surface of the base part 171 is fitted to the thickness of the base part 151 of the drive unit 150. It is set to the same dimension as the total thickness of the ring 160 or slightly smaller than that. Further, the dimension from the base end position of the locking claw 174 (a position corresponding to one side surface of the base portion 171) to the lower surface of the claw portion 174C (the lower surface in the vertical direction in FIG. 2) is the base portion 151 of the drive unit 150. And the distance from the other side surface of the fitting ring 160 to the upper surface of the latching protrusion 164 (upper surface in the vertical direction in FIG. 2). As a result, the rotation restricting portion 170 is disposed opposite to the fitting ring 160 with the drive portion 150 interposed therebetween, and the locking claw 174 of the rotation restricting portion 170 extends beyond the outer peripheral surface of the base portion 151 of the drive portion 150. When inserted into the engagement recess 163 of the fitting ring 160, the locking claw 174 of the rotation restricting portion 170 is elastically deformed, so that the claw portion 174C elastically climbs over the latching protrusion 164 of the fitting ring 160. The rotation restricting portion 170 is engaged with the engagement ring 160 with the driving portion 150 interposed therebetween, and is integrally connected. Here, in the present embodiment, the restricting protrusion 173 of the rotation restricting portion 170 rotates the movable disk 130 in the forward / reverse rotation direction by the rotation drive portion (drive shaft 154 and drive connecting portion 152) of the drive portion 150. When this occurs, it contacts and engages with the drive portion side restricting portion composed of the drive connecting portion 152 to restrict and prevent further rotation of the rotation drive portion (drive shaft 154 and drive connecting portion 154), and the movable disk 130. Functions as a rotation restricting portion side engaging portion that restricts or restricts the rotation angle range within a predetermined angle range. That is, in the present embodiment, the rotation that limits or restricts the rotation angle range of the movable disk 130 within a predetermined angle range by the drive connecting portion 154 of the drive portion 150 and the restriction protrusion 174 of the rotation restriction portion 170. A range regulating means is configured. As described above, the rotation restricting portion 170 is interposed between the movable disk 130 and the driving portion 150 and is fixed so as not to be rotatable relative to the holding portion 110 (the driving shaft 152 and the driving connecting portion). The rotation range of the rotation drive unit (consisting of 154) in the positive rotation direction is brought into contact with and engaged with one side of the drive connection unit 154 of the rotation drive unit, so that a predetermined first angular position (when the water stops) The rotation range of the rotation drive unit in the reverse rotation direction is brought into contact with and engaged with the other side of the drive connection unit 154 of the rotation drive unit. The position of the movable disk 130 by the rotation drive unit is limited to a predetermined angular range between the first angular position and the second angular position (for example, a range of 90 degrees). It is limited to.

[Assembly of switching valve cartridge]
The switching valve cartridge 100 configured as described above can be assembled and integrated as follows to form a cartridge. First, in order to attach the fixed disk 120 to the holding part 110, the support rods 112, 113 of the holding part 110 are inserted into the support bar insertion holes 122 of the fixed disk 120, and the support part 112 is engaged with the support bar insertion holes 122. The locking hole 113a is inserted into the locking hole 122a in a loosely inserted state, the locking portion 113 is fitted into the locking hole 122a of the support rod insertion hole 122, and the engagement protrusion 114 is engaged with the corresponding engagement hole of the support rod insertion hole 122. Fits closely to 122b. Thereby, first, the fixed disk 120 is aligned with the holding unit 110 and overlapped in close contact, and attached so as not to be relatively rotatable. Next, in order to attach the movable disk 130 to the fixed disk 120 superposed on the holding part 110, the movable disk 130 is aligned and superposed on the fixed disk 120, and the support part of the holding part 110 is placed in the support rod insertion hole 132. 112 is inserted and fitted, and the movable disk 130 is aligned and arranged in close contact with the fixed disk 120 (attached in a state in which it cannot rotate relative to the holding unit 110). As a result, the movable disk 130 (which is not restricted in the rotation direction with respect to the holding unit 110 and the fixed disk 120) can rotate relative to the fixed disk 120 in the forward and reverse rotation directions. At this time, a predetermined length portion on the tip side of the support portion 112 of the holding portion 110 protrudes from one side surface of the movable disk 130.

  Next, the rotation restricting portion 170 is attached to the movable disc 130 that is attached to the fixed disc 120 in an overlapping manner. That is, the engaging hole 172F of the rotation restricting portion 170 is fitted to the tip of the support portion 112 of the holding portion 110 protruding from one side surface of the movable disk 130, and the holding portion 110 and the rotation restricting portion 170 are mutually connected. Connect so that relative rotation is impossible. At this time, between the other side surface of the base portion 171 of the rotation restricting portion 170 and one side surface of the base portion 131 of the movable disc 130, the protrusion length of the locking portion 113 from the movable disk 130 and the rotation restricting portion 170 are set. A gap having a predetermined dimension corresponding to a difference from the axial length of the locking hole 172F is formed, and the rotation restricting portion 170 is arranged to face the movable disk 130 with a gap therebetween. . This is because the movable disk 130 is rotatable relative to the fixed disk 120 (that is, relative to the holding section 110 that holds the fixed disk 120 so as not to be relatively rotatable), whereas the rotation restricting section 170 is Since the locking portion 113 and the locking hole 172F are locked to each other so as to be relatively unrotatable with respect to the holding portion 110, the rotation restricting portion 170 is attached to the movable disk 130 when the driving portion 150 is rotated. This is to prevent the rotating operation of the movable disk from being disturbed by contact. At this time, the small hole 172H of the rotation restricting portion 170 is aligned with and opposed to the female screw 113T at the center of the front end surface of the locking portion 113 inserted into the locking hole 172F. Thereafter, a male screw such as a screw (not shown) is inserted into the small hole 172H of the rotation restricting portion 170, and the screw portion is screwed into the female screw 113T of the locking portion 113, whereby the rotation restricting portion 170 is inserted. Is fixed to the holding unit 110 so as not to be detached (including axial separation). As a result, the fixed disk 120 and the movable disk 130 are assembled between the holding part 110 and the rotation restricting part 170 so that they cannot be moved or separated in the axial direction (relative to the fixed disk 120 and the movable disk 130). It can be integrated (to allow rotation).

  Next, in a state where the movable disk 130 is rotated relative to the rotation restricting portion 170 at an angular position where the restricting protrusion 173 of the rotation restricting portion 170 does not overlap the fitting recess 133 of the movable disc 130. Then, the pair of drive connecting portions 152 of the drive unit 150 are fitted into and inserted into the pair of fitting recesses 133 of the movable disk 130. At this time, a slight gap is formed between the other side surface of the base portion 151 of the driving portion 150 and one side surface of the base portion 171 of the rotation restricting portion 170, and the driving portion 150 is operated when the driving portion 150 is rotated. It is possible to prevent a situation in which the rotation operation is hindered by contacting the rotation restricting portion 170. As a result, the drive unit 150 and the movable disk 130 are connected to each other so as not to be rotatable relative to each other, and the movable disk 130 can be rotated in the forward and reverse rotation directions by the drive unit 150. At this time, a predetermined length portion on the distal end side of the locking claw 174 of the rotation restricting portion 170 protrudes from one side surface of the base portion 151 of the driving portion 150. Then, the fitting hole 162 of the fitting ring 160 is inserted into the drive shaft 154 of the drive unit 150, and the pair of fitting recesses 163 of the base unit 161 are rotated (projected from the base unit 151 of the drive unit 150). When the pair of engaging claw pieces 174 of the movement restricting portion 170 are fitted, the engaging claws 174 of the rotation restricting portion 170 are elastically deformed, whereby the claw portion 174C elastically deforms the latching protrusion 164 of the fitting ring 160. The rotation restricting portion 170 is fitted to the fitting ring 160 with the driving portion 150 therebetween, and is integrally connected. At this time, since a gap is formed between the inner peripheral edge of the fitting hole 162 of the fitting ring 160 and the driving shaft 154 of the driving unit 150, the fitting ring 160 prevents the rotation of the driving shaft 154. There is nothing. At this time, since the fitting ring 160 is connected to the rotation restricting portion 170 so as not to be detached in the axial direction, the driving portion 150 is held between the fitting ring 160 and the rotation restricting portion 170. As a result, the drive unit 150 cannot move or detach from the movable disk 130 in the axial direction.

  On the other hand, on the other side of the holding unit 110, the raw water inlet hole 145, the raw water outlet hole 146, the purified water inlet hole 147, the purified water outlet hole 148, and the positioning protrusion hole 149 of the packing 140 are respectively provided. By inserting the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, the purified water outlet 118, and the positioning protrusion 119 of the holding part 110, the packing 140 is placed on the other side of the holding part 110 (the material of the packing 140). (For example, holding force by elastic contact). At this time, the packing 140 is attached to the holding unit 110 so as not to be detached unless an external force in the removal direction is intentionally applied, and maintains water tightness on the other side surface of the holding unit 110.

[Assembly of the switching valve cartridge to the faucet body]
In this manner, the fixed disk 120, the movable disk 130, the rotation restricting portion 170, the driving portion 150, and the fitting ring 160 are sequentially attached to one side surface of the holding portion 110, and the packing 140 is attached to the other side surface of the holding portion 110. This completes the switching valve cartridge 100 of the present embodiment. As shown in FIG. 1, the switching valve cartridge 100 assembled and integrated in this way has its packing 140 side inserted into the internal space VS from the fitting portion 42 of the valve holding portion 40 of the water purifier dedicated water faucet. Insert it. At this time, the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 of the holding part 110 of the switching valve cartridge 100 are respectively connected to the raw water inlet hole 15C and the raw water outlet hole 16C inside the valve housing 40. Then, it is positioned in the purified water inflow hole 17C and the purified water outflow hole 18C and is inserted in a watertight state (or closely in a watertight manner) in an aligned state. Accordingly, as shown in FIG. 7, the raw water inlet 115, the raw water outlet 116, the purified water inlet 117, and the purified water outlet 118 of the holding unit 110 of the switching valve cartridge 100 are respectively fed into the raw water in the valve housing portion 40. The raw water inflow path 15R, the raw water outflow path 16P, the purified water inflow path 17P, and the purified water, which are the flow path structure in the base 10 of the faucet body, through the hole 15C, the raw water outflow hole 16C, the purified water inflow hole 17C, and the purified water outflow hole 18C. A continuous flow path is formed in communication with the outflow path (the flow path portion continuing to the purified water outflow hole 18C).

  At this time, a predetermined length portion on the distal end side of the drive shaft 54 of the switching valve cartridge 100 protrudes from the distal end opening of the fitting portion 42 to the outside. Next, the fastening portion 50 is externally fitted to the drive shaft 54 of the switching valve cartridge 100, and the male screw portion 52 is screwed into the female screw 42a of the fitting portion 42, whereby the switching valve cartridge 100 is fitted to the valve holding portion. 40 is fixed at a predetermined position so as not to move. Next, the handle 60 is attached to the valve accommodating portion 40, and the distal end portion of the drive shaft 154 protruding from the valve accommodating portion 40 is fitted into the engaging hole of the engaging portion 64 so as not to be relatively rotatable. To do. At this time, the cap 63 of the handle 60 is removed from the rotating portion 61. Next, the male screw 65 is screwed into the female screw 154T of the drive shaft 154 through the communication hole formed in the center of the engagement portion 64 in a state where the drive shaft 154 is engaged and held with the engagement portion 64 of the handle 60. By doing so, the handle 60 is drivingly connected to the drive shaft 154 and is fixed to the valve housing portion 40 so as not to be able to be removed and to be rotated. Thereafter, the cap 63 is attached to the rotating portion 61 to shield the male screw 65 and the like from the outside. Accordingly, the switching valve cartridge 100 performs a predetermined switching valve operation (switching valve operation between the movable disk 130 and the fixed disk 120 by a rotating operation) through the drive shaft 154 in accordance with the rotation operation of the handle 60. Do.

[Switching valve operation of switching valve cartridge]
The switching valve cartridge 100 moves the movable disk 130 connected to the drive unit 150 in response to the rotation operation of the drive unit 150 in the forward / reverse rotation direction by the rotation operation of the handle 60 in the forward / reverse rotation direction. A predetermined valve switching operation is performed by rotating in the forward and reverse rotational directions. Specifically, the switching valve cartridge 100 passes from the water discharge position shown in FIGS. 7 to 9 to the water stop position shown in FIGS. 13 to 15 through the water stop intermediate position shown in FIGS. 10 to 12. The movable disk 130 is closed in the forward rotation direction (water stop direction), and conversely, from the water stop position shown in FIGS. 13 to 15 to the water stop middle position shown in FIGS. Then, the valve-opening operation is performed in the reverse rotation direction (water discharge direction) to the water discharge position shown in FIGS. As a result, the switching valve cartridge 100 completely allows the mutual water flow operation between the fixed disk 120 and the movable disk 130 at the water discharge position of the movable disk 130 (that is, at a predetermined water flow rate). In addition, at the water stop position of the movable disk 130, the mutual water movement operation between the fixed disk 120 and the movable disk 130 is completely blocked (that is, the water flow amount is set to zero). To do). Further, the switching valve cartridge 100 has a water stop halfway position (preferably an intermediate angle between the water discharge time position and the water stop time position), which is an intermediate position where the movable disk 130 makes an angle transition from the water discharge time position to the water stop time position. Position), the water flow operation from the fixed disk 120 to the movable disk 130 (that is, the operation of supplying raw water from the switching valve cartridge 100 to the water purifier main body) is completely cut off, while the movable disk 130 is moved to the fixed disk 120. The water flow operation (the operation of supplying purified water from the water purifier body to the water outlet) is completely allowed.

  Further, in the valve switching operation of the switching valve cartridge 100, one side surface of the drive connecting portion 152 of the drive unit 150 is one of the restricting protrusions 173 of the rotation restricting portion 170 at the water passage position of the movable disk 130. At the water stop position of the movable disk 130, the other side surface of the drive connecting portion 152 of the drive unit 150 is prevented from rotating further in the reverse rotation direction (water discharge direction) by contacting the restriction surface 173R. Is in contact with the other restricting surface 173R of the restricting protrusion 173 of the turn restricting portion 170 so as to be prevented from further turning in the reverse rotation direction (water discharge direction). The movable disk 130 has a predetermined angle range (for example, an angle range of 90 degrees) between the water passing position and the water stopping position without providing a rotation restricting structure with a cover as in the case of the ceramic valve cartridge of the present invention. ) Only so as to rotate in the forward and reverse rotation direction with respect to the fixed disc 120. Further, in the valve switching operation of the switching valve cartridge 100, the contact surfaces of the fixed disk 120 and the movable disk 130 are (for example) predetermined surface roughness (Ra 0.2 μm or less) and flatness (0. 3 μm or less), it is formed on a flat surface with a high smoothness. Therefore, high water tightness and airtightness are exhibited between the close contact surfaces of the fixed disk 120 and the movable disk 130, and the fixed disk 120 and the movable disk 130 are mutually connected. The raw water and purified water (through water) are completely prevented from leaking to the outside from the close surface of the fixed disk 120, so that the fixed disk 120 (without providing a watertight structure with a cover like a conventional ceramic valve cartridge) is prevented. The watertight structure (and airtight structure) between the movable disk 130 and the movable disk 130 can be completely maintained and secured. Hereinafter, the valve switching operation by the switching valve cartridge 100 will be described in detail particularly in relation to the water flow operation and the water stop operation by the relative angular position of the movable disk 130 with respect to the fixed disk 120.

[Position at the time of water discharge]
At the water discharge position, the movable disk 130 has one end in the arc direction of the raw water inlet communication recess 135L (a normal water stop direction) as shown in FIGS. 9 (a), 17 (a) and 18 (a). The base end in the rotation direction) is perfectly aligned with the raw water inlet 125H of the fixed disk 120, and the other end in the arc direction of the raw water port communication recess 135L (the front end in the positive rotation direction) is the fixed disk. It is completely aligned with one end of the 120 raw water outlet extended recess 126L in the arc direction (the base end opposite to the raw water outlet 126H). As a result, the raw water RW from the raw water inflow hole 15C inside the valve housing 40 of the water purifier dedicated faucet passes through the raw water inflow hole 115H from the raw water inflow hole 115H of the holding part 110 of the switching valve cartridge 100, and the fixed disk 120 After flowing into the raw water inlet 125H, it flows into the raw water outlet 126H of the fixed disk 120 through the raw water port communication recess 135L of the movable disk 130. Then, the raw water RW from the raw water outlet 126H of the fixed disk 120 flows into the water purifier main body through the raw water outlet hole 116H and the raw water outlet 116 of the holding part 110 and the raw water outlet hole 16C of the valve housing part 40. And it is converted into purified water by the water purifier body. The purified water from the water purifier main body flows again into the purified water inflow hole 17C of the valve housing 40, passes through the purified water inflow hole 117H from the purified water inlet 117 of the holding unit 110 of the switching valve cartridge 100, and the purified water flow of the fixed disk 120. It flows into the inlet 127H.

  At this time, since the movable disk 130 is in the water discharge position, as shown in FIGS. 9B, 17A, and 18A, the other end (in the arc direction) of the water purification port communication recess 137L is provided. The tip in the rotation direction) is perfectly aligned with one end in the arc direction of the fixed water inlet extended recess 127L of the fixed disk 120 (the end opposite to the purified water inlet 127H), and the purified water inlet communication recess 137L. The center portion in the arc direction (the intermediate portion between the base end portion and the tip end portion in the forward rotation direction or the reverse rotation direction) is completely aligned with the purified water outlet 128H of the fixed disk 120. As a result, the purified water PW from the purified water inlet 127H of the fixed disk 120 flows from the purified water inlet extended recess 127L into the purified water outlet 128H of the fixed disk 120 through the purified water port communication recess 137L of the movable disk 130, and is fixed. It flows from the purified water outlet 128H of the disk 120 through the purified water outlet hole 118H and the purified water outlet 118 of the holding part 110 to the purified water outlet hole 18C of the valve housing part 40, and finally from the cylindrical part 21 to the water discharge pipe 30. And discharged from the water discharge port of the water discharge pipe 30 (in a state where water is adjusted by the water adjustment unit 33). In addition, the raw | natural water RW and the purified water PW in said water discharge position will flow in the arrow direction shown in FIG.7 and FIG.8. Further, at the water discharge position, as shown in FIG. 17A, one side surface of the pair of drive connecting portions 152 of the drive portion 150 is one of the pair of restricting protrusions 173 of the rotation restricting portion 170, respectively. No further rotation in the reverse rotation direction (water discharge direction) is abutted against the restriction surface 173R.

[Position in the middle of water stoppage]
At the mid-water stop position, as shown in FIGS. 12 (a), 17 (b), and 18 (b), the movable disk 130 has its whole raw water inlet communication recess 135L disposed in the raw water flow of the fixed disk 120. The outlet extension recess 126L is perfectly aligned (that is, the raw water port communication recess 135L and the raw water outlet extension recess are perfectly aligned with each other over the entire length in the arc direction). As a result, the raw water inlet 125 of the fixed disk 120 is in contact with the fixed disk 120 on the reverse rotation direction side of the movable disk 130 (that is, the portion closer to the front side in the forward rotation direction than the raw water port communication recess 135L). The front end opening of the raw water inlet 125 is completely shielded by the contact surface portion. Therefore, unlike the case of the water discharge operation described above, the raw water RW that has flowed from the raw water inlet 115 of the holding unit 110 into the raw water inlet 125H of the fixed disk 120 through the raw water inlet hole 115H is the raw water inlet of the movable disk 130. The flow collides with the contact surface on the side opposite to the rotation direction with respect to the connecting recess 135L, and the flow is completely blocked, and does not flow into the raw water outlet 126H of the fixed disk 120 at all. That is, at this time, the amount of water flowing from the raw water inlet 125H of the fixed disk 120 to the raw water outlet 126H becomes zero, and unlike the case of the water discharge operation described above, the raw water outlet 126H of the fixed disk 120 is moved to the water purifier body. And the amount of raw water RW newly flowing in becomes zero.

  Therefore, the water pressure (raw water pressure) applied to the water purifier main body from the switching valve cartridge 100 via the secondary side raw water flow path at the water discharge position becomes zero at the water stop halfway position. There are water stoppages inside the raw water flow path (secondary raw water flow path) from the valve cartridge 100 to the water purifier main body and the water purification flow path (temporary water purification flow path) from the water purifier main body to the switching valve cartridge 100. Residual pressure due to the water pressure applied up to the hour position (and due to water flow resistance in the water purifier body) remains. Therefore, while there is no new inflow of the raw water from the raw water outlet 126H of the fixed disk 120, the purified water inside the water purifier main body at a flow rate corresponding to the residual pressure due to the residual pressure. It flows into the inflow hole 17C and flows from the purified water inlet 117 of the holding part 110 of the switching valve cartridge 100 into the purified water inlet 127H of the fixed disk 120 through the purified water inlet 117H.

  At this time, since the movable disk 130 is in the middle of the water stoppage, as shown in FIGS. 12 (b), 17 (b), and 18 (b), the front end of the water purification port communication recess 137L in the forward rotation direction. Side half (the portion from the center in the arc direction to the other end in the arc direction) is perfectly aligned with the entire purified water inlet extension recess 127L of the fixed disk 120, and the arc of the water purification port communication recess 137L One end of the direction is completely aligned with the purified water outlet 128H of the fixed disk 120. As a result, the purified water PW from the purified water inlet 127H of the fixed disk 120 passes through the purified water inlet extension recess 137L of the movable disk 130 from the purified water inlet extended recess 127L at a flow rate corresponding to the residual pressure, and the purified water of the fixed disk 120 is purified. It flows into the outlet 128H. Then, the purified water PW from the purified water outlet 128H of the fixed disk 120 flows into the purified water outlet hole 18C of the valve housing 40 through the purified water outlet hole 118H and the purified water outlet 118 of the holding unit 110, and finally, It flows into the water discharge pipe 30 from the cylinder part 21, and is discharged from the water discharge port of the water discharge pipe 30 (in a state where water has been adjusted by the water adjustment part 33) at a flow rate corresponding to the residual pressure. The purified water PW at the water discharge position flows in the direction of the arrow shown in FIGS. 10 and 11, but the raw water RW is prevented from flowing as indicated by a cross in FIG. 10. At this mid-water stop position, as shown in FIG. 17 (b), the pair of drive connecting portions 152 of the drive portion 150 are respectively disposed at intermediate positions of the pair of restricting protrusions 173 of the rotation restricting portion 170. ing.

  Here, the mid-water stop position is an intermediate position between the water discharge position and the water stop position, and an intermediate angle position (1) of the rotation angle range between the water discharge position and the water stop position of the movable disk 130. However, the movable disk 130 is not restricted to rotate at this mid-water stop position (by a position holding operation such as any restricting member or positioning member) and stops rotating. The portion 150 is continuously rotated in the normal rotation direction from the water discharge position to the water stop position. Therefore, at the midway position when the water stops, which is the midway position from the water discharge position to the water stop position, the raw water RW from the raw water inlet 125H of the fixed disk 120 is instantaneously blocked by the contact surface of the movable disk 130. Instead, the one end edge in the arc direction of the raw water communication recess 135L overlaps with the raw water inlet 125H within the range of the diameter of the raw water inlet 125H from the water discharge position where the raw water inlet 125H perfectly aligns with the raw water inlet 125H. Until the opening range is gradually reduced and the overlapping opening range disappears completely, that is, while the raw water inlet communication recess 135L of the movable disk 130 overlaps the raw water inlet 125H of the fixed disk 120 (such time However, the raw water RW from the raw water inlet 125H corresponds to the overlapping opening area of the raw water communication recess 135L and the raw water inlet 125H. Only flow, flows into the raw water outlet 126H via the raw water outlet extending recesses 126L from the raw water inlet connection recess 135L. That is, the raw water RW has a corresponding gradually decreasing flow rate as the overlapping opening area of the raw water communication recess 135L and the raw water inlet 125H gradually decreases as the movable disk 130 rotates, and the raw water outlet 126H. Finally, when the overlapping opening area of the raw water communication recess 135L and the raw water inlet 125H disappears (that is, at the middle of the water stoppage in FIG. 12), the inflow of the raw water RW is completely stopped and the raw water Complete water stop of RW is completed. In other words, the arc length (arc angle) of the raw water port communication recess 135L of the movable disk 130, the arc length (arc angle) of the raw water outlet extension recess 126L of the fixed disk 120, and the raw water inlet of the fixed disk 120 Due to the correlation with the distance from 125H to the raw water outlet 126H, it is possible to gradually reduce the flow rate of the raw water RW.

  On the other hand, during the gradual reduction operation of the raw water RW, the purified water inlet 127H and the purified water outlet 128H of the fixed disk 120 are communicated with each other by the purified water port communication recess 137L of the movable disk 130 and the purified water inlet extension recess 127L of the fixed disk 120. Since the water is completely maintained, the purified water PW from the purified water inlet 127H is discharged from the outlet of the water discharge pipe 30 without being stopped at all. Therefore, the purified water in the primary side purified water flow path from the water purifier main body to the switching valve cartridge 100 and the secondary side purified water flow path from the switching valve cartridge 100 to the water discharge port of the water discharge pipe 30 depends on the residual pressure. It is discharged from the water outlet of the water discharge pipe 30. That is, at the midway position of water discharge, the switching valve cartridge 100 performs a switching valve operation so as to release the residual pressure, and in particular, the inside of the secondary side water purification flow path from the switching valve cartridge 100 to the water discharge port of the water discharge pipe 30. The switching valve operation is performed so as to completely release the residual pressure (particularly, the purified water remaining in the water discharge pipe 30) (that is, completely prevent leakage or dropping of purified water from the water discharge port). Therefore, in the middle of the stoppage of water, the residual pressure in the purified water flow path from the switching valve cartridge 100 to the water discharge port of the water discharge pipe 30 is completely released, and no residual pressure remains. At this time, during the gradual decrease operation of the raw water RW, the raw water RW having a flow rate corresponding to the overlapping opening area of the raw water communication recess 135L and the raw water inlet 125H is (in the short time) the water purifier main body. Compared with the case where the inflow of the raw water RW is interrupted instantaneously, the rapid change in the residual pressure of purified water is alleviated and the residual pressure is released. It can be done smoothly.

[Position at water stop]
At the water stop position, the movable disk 130 has one end in the arc direction of the raw water inlet communication recess 135L of the fixed disk 120 as shown in FIGS. 15 (a), 17 (c) and 18 (c). It exists in the position which aligns completely with the raw | natural water outlet 126H in the circular arc direction other end part of the raw | natural water outlet extended recessed part 126L. Thereby, the raw water inlet 125 of the fixed disk 120 still faces the contact surface portion with the fixed disk 120 on the reverse rotation direction side of the movable disk 130, and the contact surface portion opens the front end of the raw water inlet 125. Is completely shielded. Therefore, the raw water RW that has flowed from the raw water inlet 115 of the holding unit 110 into the raw water inlet 125H of the fixed disk 120 through the raw water inlet 115H is the raw water inlet of the movable disk 130, as in the case of the middle of the water stop. It collides with the contact surface of the reverse rotation direction side portion from the connecting recess 135L, and its flow is completely cut off and does not flow into the raw water outlet 126H of the fixed disk 120 at all, but the raw water inlet of the fixed disk 120 The amount of water flowing from 125H to the raw water outlet 126H is maintained at zero, and the amount of raw water RW newly flowing from the raw water outlet 126H of the fixed disk 120 into the water purifier main body is maintained at zero. At this time, as described above, the water pressure (raw water pressure) applied from the switching valve cartridge 100 to the water purifier main body via the secondary-side raw water flow path becomes zero at the mid-water stop position, and the switching valve cartridge The residual pressure in the purified water flow path from 100 to the outlet of the water discharge pipe 30 has completely disappeared, and the purified water PW does not flow into the purified water inlet 127H of the fixed disk 120.

  Further, at this time, since the movable disk 130 is in the water stop position, as shown in FIGS. 15 (b), 17 (c) and 18 (c), the water purification port communication recess 137L in the forward rotation direction. The proximal half (the portion from one end in the arc direction to the center in the arc direction) is completely aligned with the entire purified water inlet extension recess 127L of the fixed disk 120, and the purified water port communication recess 137L is fixed. It is in a position completely separated from the purified water outlet 128H of the disk 120, and faces the contact surface portion with the fixed disk 120 on the reverse rotation direction side of the movable disk 130. The tip opening is completely shielded. Further, the purified water inlet 127H of the fixed disk 120 faces the purified water port communication recess 137L of the movable disk 130, but one end edge of the purified water port communication recess 137L (that is, the edge of the purified water outlet 128H side) The movable disk 130 and the fixed disk 120 are completely shielded by the contact surface. Thus, the purified water at the purified water inlet 127H of the fixed disk 120 (including the case where the residual pressure remains in the purified water flow path and the purified water PW flows into the purified water inlet 127H of the fixed disk 120). The PW is completely prevented from flowing out to the purified water outlet 128H. Accordingly, the purified water PW does not flow into the purified water outlet 128H of the fixed disk 120 at all, the amount of water flowing from the purified water inlet 127H of the fixed disk 120 to the purified water outlet 128H becomes completely zero, and the purified water of the fixed disk 120 The amount of purified water PW flowing into the water discharge pipe 30 from the outlet 128H is completely zero. As a result, the purified water in the purified water flow path in which the residual pressure has already been released and disappeared in the middle of the water stoppage (particularly, the purified water in the flow path from the switching valve cartridge 100 to the water discharge pipe 30) should be Even when there is some residual pressure that is not released at the middle of the water stoppage, even when purified water that flows in the water purification passage remains, the water flow outlet of the water discharge pipe 30 stops completely at the water stop position. It is possible to completely prevent the purified water from leaking out or dripping. Note that the raw water RW and the purified water PW at the above-mentioned mid-water stop position are prevented from flowing as indicated by x in FIG. In this water stop position, as shown in FIG. 17C, the other side surfaces of the pair of drive connecting portions 152 of the drive portion 150 are respectively the other of the pair of restricting protruding pieces 173 of the rotation restricting portion 170. It abuts against the restriction surface 173R and is prevented from rotating further in the forward rotation direction (water stopping direction).

  Here, the water discharge position is a start position in the forward rotation direction (water stop direction) (that is, the final position in the reverse rotation direction (water discharge direction)), and the water stop position is the forward rotation direction (water stoppage). Direction) (that is, the starting position in the forward rotation direction (water stoppage direction)). The movable disk 130 is continuously rotated in the normal rotation direction by the drive unit 150 until the rotation is stopped by the rotation restricting unit 170 at this water stop position until the rotation is stopped, and the circular arc of the clean water communication recess 137L. The overlapping opening range is gradually decreased from the intermediate stop position where the one end edge in the direction is completely aligned with the purified water outlet 128H within the diameter range of the purified water outlet 128H to gradually reduce the overlapping opening range with the purified water outlet 128H. Until the water purification port 137L of the movable disk 130 overlaps the purified water outlet 128H of the fixed disk 120 (although such time is very short). Communication between the communication recess 137L and the purified water outlet 128H is maintained for the time being. At this time, since the residual pressure in the purified water flow path has disappeared, regardless of the overlapping range between the purified water communication recess 137L and the purified water outlet 128H, the purified water is connected via the communication of the purified water connection recess 135L and the purified water outlet 128H. Although the purified water PW does not flow through the flow path, even if there is some residual pressure that is not released at the middle of the water stoppage, even if the purified water flowing in the purified water flow path remains, finally When the overlapping opening area of the purified water communication recess 135L and the purified water inlet 128H disappears (that is, the water stop position in FIG. 15), the flow of the purified water PW is completely stopped, and the complete water stop of the purified water PW is completed. In other words, the arc length (arc angle) of the water purification port communication recess 137L of the movable disk 130, the arc length (arc angle) of the purified water inlet extension recess 127L of the fixed disk 120, and the purified water inlet of the fixed disk 120 Due to the correlation with the distance from 127H to the purified water outlet 128H, in the unlikely event that there is some residual pressure that is not released at the midway position of the water stop, the purified water PW in the case where the purified water flowing in the purified water passage remains Complete water stop operation is possible.

[Characteristic effect 1 (complete water stop)]
As described above, according to the water purifier dedicated water faucet of the present embodiment, in particular, by adopting the switching valve cartridge of the above configuration, despite adopting a so-called main-stop type water stop structure, When switching from the clean water discharge mode to the clean water stop mode, the communication between the primary side raw water flow path and the secondary side raw water flow path is first blocked by the switching valve cartridge 100 at a midway stop position. Thus, the raw water from the primary side raw water pipe can be completely stopped upstream from the secondary side raw water flow path, and the downstream side from the switching valve cartridge 100 (secondary side raw water flow path inside the water purifier main body). , Secondary side raw water pipe, internal flow path of water purifier body, water purification pipe, primary side water purification flow path, switching valve mechanism, secondary side water purification flow path, and a series of flow paths connected to the water discharge pipe, in particular, the water purifier body In the flow path around the internal flow path) Retained retained water (raw water and purified water) is maintained downstream by the switching valve cartridge 100 and discharged from the water discharge pipe 30, so that the downstream side of the switching valve cartridge 100 due to water flow resistance and the like inside the water purifier main body. The residual pressure of the raw water and / or purified water in the flow path of the water can be released and eliminated, and the purified water in the purified water flow path from the water purifier main body is completely removed by the switching valve cartridge 100 at the water stop position. The water can be stopped and the flow of purified water downstream from the switching valve cartridge can be completely stopped to completely prevent the purified water from dripping from the water outlet at the tip of the water discharge pipe 30. That is, according to the water purifier dedicated water faucet of the present embodiment, the retained water downstream from the water stop position at the time of water stoppage of the water discharge pipe, even though a so-called original water stop structure is adopted. The problem of dripping from the water outlet at the tip can be completely prevented.

[Characteristic effect 2 (Securing residual pressure release operation time)]
Further, the switching valve cartridge 100 includes an arc groove-shaped raw water port communication recess 135 </ b> L that forms a part of the raw water flow path in the movable disk 130 and an arc groove-shaped water purification port communication recess that forms a part of the water purification flow path. In addition to providing 137L, the fixed disk 120 also has an arc groove-shaped raw water outlet extension recess 126L that forms part of the raw water flow path and an arc groove shape that forms part of the water purification flow path. A purified water inlet extension recess 127L is provided, and the flow length of the raw water flow path between the raw water inlet 125H and the raw water outlet 126H of the fixed disk 120 is set to the raw water outlet extension recess 126L and the raw water inlet communication recess 135L. The length of the flow path of the purified water flow path between the purified water inlet 127H and the purified water outlet 128H of the fixed disk 120 is increased by communicating with the purified water inlet extended recess 127L and the purified water outlet communication recess 137L. It is extended by communicating. Therefore, the switching valve cartridge 100 in the above-described complete water stopping operation from the time of water discharge to the time of water stopping, when the raw water flow path is completely closed and the flow of the raw water is completely stopped (when the raw water is completely stopped). The time interval between the time when the path is completely closed and the flow of purified water is completely stopped (when the purified water is completely stopped), that is, the fixed time interval centered on the middle of the water stop (Patent Document 1). As compared with the case where an arc-shaped flow path is provided only on the fixed disk side, the secondary-side raw water flow path and the primary can be extended between the time when the raw water is completely stopped and the time when the raw water is completely stopped. The time interval (residual pressure release time) for releasing the residual pressure in the side and secondary side purified water flow paths can be sufficiently secured.

  Specifically, in the valve switching operation of the switching valve cartridge 100, the movable disk 130 starts (in the water stop direction) with respect to the fixed disk 120 at the water discharge position shown in FIGS. 17 (a) and 18 (a). One end in the arc direction of the raw water inlet communication recess 135L is completely aligned with and overlapped with the raw water inlet 125H, and the raw water inlet communication recess 135L communicates the raw water inlet 125H and the raw water outlet extension recess 126L. On the other hand, the central portion in the arc direction of the water purification port communication recess 137L is perfectly aligned with and overlaps with the water purification outlet 128H, and the water purification port communication recess 137L communicates the water purification inlet extension recess 127L and the water purification outlet 128H. At this time, both the raw water and the purified water are flowing in the raw water channel and the purified water channel at normal flow rates, respectively. Next, when the movable disk 130 is rotated in the direction of water stoppage from this water discharge position to the position shown in FIG. 19A, the raw water inlet communication recess 135L is indicated by a two-dot chain line in FIG. 19A. Then, the edge in the arc direction moves to a position where it does not overlap with the raw water inlet 125H at all, and the raw water flow path is completely blocked by the switching valve cartridge 100 (that is, the primary side raw water flow path and the secondary side raw water flow path). Is completely shielded from the water, and the flow of the raw water stops completely. On the other hand, at this time, the water purification port communication recess 137L communicates the purified water inlet extension recess 127L and the purified water outlet 128H as shown by a two-dot chain line in FIG. The flow of purified water is allowed. Next, when the movable disk 130 is further rotated in the direction of water stoppage from the position of FIG. 19A and rotated to the position of FIG. 19B, the water purification port communication recess 137 becomes a one-dot chain line in FIG. 19B. As shown, the arc direction one end edge moves to a position where it does not overlap with the purified water outlet 128H at all, and the purified water passage is completely blocked by the switching valve cartridge 100 (that is, the primary side purified water passage and the secondary side). The water is completely blocked from the purified water flow path, and the purified water is completely stopped so that the flow of the purified water stops completely). At this time, the raw water inlet communication recess 135L also moves to the position indicated by the alternate long and short dash line in FIG.

  That is, according to the water purifier dedicated faucet of the present embodiment, as shown in FIG. 19 (c), the switching valve cartridge 100 allows the raw water inlet communication recess 135L of the movable disk 130 to communicate with the raw water inlet 125H. From the time when the raw water flow is completely shut off and the raw water flow path is completely shut off (the state shown in FIG. 19A), the water purification port communication recess 137L completely cuts off the communication with the purified water outlet 128H. The time interval and the rotation angle range (residual pressure release angle range) for releasing the residual pressure until the time when the purified water is completely stopped (state of FIG. 19B), which is the time when the purified water flow path is completely blocked. ) As shown in FIG. 19 (c), this residual pressure release angle range is an angle from the raw water complete water stop position (position of FIG. 19 (a)) to the purified water complete water stop position (position of FIG. 19 (b)). The residual pressure can be released during this residual pressure release angle range γ, and a sufficient time interval for the residual pressure releasing operation can be secured. This residual pressure release angle range γ is, for example, the rotation angle during the water stop operation from the water discharge position of the movable disk 130 (position in FIG. 17A) to the water stop position (position in FIG. 17C). When the range is set to 90 degrees, the angle range is about 45 degrees (that is, an angle range of about one half of the water stop operation angle range), and the corresponding angle range of Patent Document 1 (Patent Document 1) The angle of the overlapping range of the recess 12 shown in FIG. 7 with the second inlet 7 is much larger than a very small angle range corresponding to a fraction of the diameter of the second inlet 7). This is the angle range.

  Further, the switching valve cartridge 100 includes the fixed disk 120 and the movable disk 130 having the above-described flow path structure, so that the raw water is completely stopped with the intermediate angle position of the movable angle range of the movable disk 130 as the water stop position. Residual pressure can be released. As a result, the water purifier dedicated water faucet of the present embodiment uses the switching valve cartridge 100 in the valve switching operation by rotating the handle 60 so that the user can easily operate the handle from an ergonomic point of view (preferably Allows the valve to be switched in an angle range of about 90 degrees) and to release the residual pressure naturally at a position where the user rotates the handle 60 to the end angle position of the optimum angle range. Therefore, without causing the user to feel the operational feeling or discomfort during the release of the residual pressure, the release of the residual pressure can be completed smoothly, preventing the leakage or dropping of purified water from the spout at the time of water stoppage. It can be completely prevented.

[Characteristic effect 2 (Parts can be replaced)]
In addition, the water purifier dedicated water faucet of the present embodiment employs the integrated switching valve cartridge 100 having the above-described configuration as the switching valve mechanism, and the switching valve cartridge 100 is attached to and detached from the valve accommodating portion 40 of the water purifier dedicated water faucet. Since the configuration is such that the switching valve cartridge 100, which is a consumable part, is deteriorated in performance over time, the switching valve cartridge 100 can be easily replaced (replacement of the switching valve mechanism). Therefore, the maintenance cost (maintenance cost) as a product can be reduced at a low cost (compared to a conventional product that is difficult and the entire water purifier dedicated faucet needs to be replaced).

[Characteristic effect 3 (flow rate expansion by increasing flow path diameter)]
Furthermore, in the water purifier dedicated water faucet of the present embodiment, the switching valve cartridge 100 is similar to a conventional switching valve cartridge (in order to ensure watertightness by incorporating flow path components such as a fixed disk and a movable disk). Since the coverless switching valve cartridge is omitted, the diameter of the switching valve cartridge can be increased by the thickness of the conventional cover, and the holding portion 110, which is a flow path hole part, is fixed. The diameter of the disk 120 and the movable disk 130 can be enlarged. Therefore, according to the diameter increase of the holding part 110, the fixed disk 120, and the movable disk 130, the flow path holes of the holding part 110 (raw water inlet 115 and raw water inlet 115H, raw water outlet 116 and raw water outlet 116H, purified water The inlet 117 and the purified water inlet 117H, the purified water outlet 118 and the purified water outlet 118H), and the passage hole of the fixed disk 120 (raw water inlet 125, raw water outlet 126, purified water inlet 127, purified water outlet 128). Of the fixed disk 120 (raw water outlet extension recess 126L, purified water inlet extension recess 127L) and the movable disk 130 channel groove (raw water port connecting recess 135L, water outlet). The width of the communication recess 137L) can be increased. Thereby, the diameter of the flow path hole and the flow path groove of the flow path component can be enlarged (compared to the case of the cover type), and the allowable flow rate of the flow path hole and the flow path groove can be increased. As a result, especially when the water purifier dedicated faucet is required to be a slim type or compact type from the viewpoint of design (appearance design), etc., the storage space for the flow path components and the switching valve mechanism is also limited. However, in the case of the present embodiment, since the flow path diameter (and flow path width) of the flow path component is relatively increased by the coverless type switching valve cartridge, the flow path configuration Despite the limited storage space for the parts and the switching valve mechanism, a sufficient flow rate can be secured.

Embodiment 2
As shown in FIGS. 20 and 21, the water purifier dedicated water faucet according to the second embodiment of the present invention has a switching valve cartridge 200 that has a fixed disk 220 as compared with the water purifier dedicated water faucet of the first embodiment. The other configurations are the same. Specifically, the base portion 221 of the fixed disk 220 of the switching valve cartridge 200 according to the second embodiment has an edge like the fixed disk 120 according to the first embodiment on one side surface (a side surface facing the movable disk 130). The close contact portions 123 and 124 having a convex shape are not provided, and the other side surface of the base portion 221 is formed to be a complete flat surface close contact portion 223. Note that the surface of the close contact portion 223 on the other side surface of the base portion 221 (the surface on the side in contact with the movable disk 130) is polished (for example, lapping processing) in the same manner as the surfaces of the close contact portions 123 and 124 of the first embodiment. ) Is formed on a flat surface having high smoothness, and exhibits high water tightness and air tightness (with respect to the close contact surface with the movable disk 130). The base 221 of the fixed disk 220 includes a support rod insertion hole 222, a raw water inlet 225H, a raw water outlet 226H, a raw water outlet extension recess 226L, a purified water inlet 227H, a purified water inlet extension recess 227L, and a purified water outlet. 228H is formed, but these support rod insertion holes 122 of the base portion 121 of the fixed disk 120 (except that they are opened by the flat surface-like close contact portion 223 rather than the edge-projecting close contact portion). The raw water inlet 125H, the raw water outlet 126H, the raw water outlet extended recess 126L, the purified water inlet 127H, the purified water inlet extended recess 127L, and the purified water outlet 128H. The other configuration of the switching valve cartridge 200 is the same as that of the switching valve cartridge 100.

  In the water purifier dedicated water faucet of the second embodiment, the switching valve cartridge 200 performs the valve switching operation in the same manner as the switching valve cartridge 100 of the first embodiment, and exhibits the same functions and effects as those of the first embodiment. .

[Scope of the present invention]
By the way, the water purifier-dedicated faucet of the present invention is not limited to the configuration of the first embodiment and the second embodiment, and various modifications can be made within the scope of the claims. . Further, in particular, the switching valve cartridge of the present invention is applied to the water purifier dedicated faucet as in the first and second embodiments and exhibits the above-mentioned specific effects, but other than the water purifier dedicated faucet. It can also be embodied as a switching valve cartridge for a water faucet. That is, the switching valve cartridge of the present invention can be grasped as an invention of a switching valve mechanism for various faucets. Further, the switching valve cartridge of the present invention includes, for example, a fixed disk and / or a movable disk having a flow path structure different from the flow path structure of the fixed disk 120 and / or the flow path structure of the movable disk 130, while the cover It can also be embodied as an invention having a loess configuration (holding unit 110, driving unit 150, rotation restricting unit 170, etc.). Furthermore, the switching valve cartridge of the present invention includes, for example, the fixed disk 120 and / or the movable disk 130 having the above-described flow path structure, while the coverless type configuration (the holding unit 110, the driving unit 150, the rotation) It can also be embodied as an invention that does not include the restriction unit 170 or the like.

40: valve accommodating portion, 60: handle (valve mechanism operating member)
100, 200: switching valve cartridge 110: holding portion, 120, 220: fixed disk 125H: raw water inlet, 126H: raw water outlet, 126L: raw water outlet extension recess 127H: purified water inlet, 127L: purified water inlet extension recess , 128H: Purified water outlet
130: movable disk, 135L: raw water port communication recess, 137L: water purification port communication recess 150: drive unit, 152: drive shaft (rotation drive unit), 154: drive connection unit (rotation drive unit)
170: Rotation restriction part

Claims (4)

A faucet body provided with a valve housing portion, a ceramic valve type switching valve cartridge that is detachably attached to the valve housing portion of the faucet body, and valve-switching the switching valve cartridge that is drivingly connected to the switching valve cartridge A water purifier dedicated faucet provided with a valve mechanism operation member that is freely movable to operate,
The switching valve cartridge is
A holding part;
A fine ceramic fixed disk fixed in a non-rotatable manner relative to the holding portion;
A movable disk made of fine ceramics, which is disposed opposite to the fixed disk and is attached to the holding portion so as to be rotatable relative to the fixed disk in a forward and reverse rotation direction,
The movable disk and the valve mechanism operating member are driven and connected, and the movable disk can be rotated in the corresponding forward / reverse rotational direction by rotating in the forward / reverse rotational direction according to the operation of the valve mechanism operating member. A drive unit having a rotation drive unit;
The rotation unit is fixed so as not to rotate relative to the holding unit, and the rotation range of the rotation drive unit in the forward rotation direction is limited to a predetermined first angular position, and the rotation drive unit can rotate in the reverse rotation direction. The range is limited to a predetermined second angular position, and the rotational angle range of the movable disk by the rotation driving unit is limited to a predetermined angular range between the first angular position and the second angular position. A rotation restricting portion that
The fixed disk has a raw water inlet for raw water inflow, a raw water outlet for raw water outflow, a purified water inlet for purified water inflow, and a purified water outlet for purified water outflow in a circumferential direction at a predetermined radial position. And an arc groove-shaped raw water outlet extension recess extending in a predetermined first angle range from the raw water outlet to an angular position before the raw water inlet in the circumferential direction, and arranged in the circumferential direction. Forming an arc groove-shaped purified water outlet extension recess extending in a predetermined second angle range from the purified water inlet to the angular position before the purified water outlet;
The movable disk has an arcuate groove shape extending in a predetermined third angular range in the circumferential direction at the same radial position as the raw water outlet extension recess of the fixed disk on a close contact surface that is a surface facing the fixed disk. A raw water inlet connecting recess that allows communication between the raw water inlet of the fixed disk and the raw water outlet extended recess, and a predetermined fourth angle in the circumferential direction at the same radial position as the raw water outlet extended recess of the fixed disk. Forming an arc groove shape extending in a range, forming a water purification port communication recess that allows the water purification outlet of the fixed disk and the water purification inlet extension recess to communicate with each other,
At the first angular position of the rotation restricting portion, the raw water port communication concave portion of the movable disk communicates the raw water inlet and the raw water outlet extended concave portion of the fixed disk, and the purified water of the movable disk A mouth communication recess communicates the purified water outlet and the purified water inlet extended recess of the fixed disk, and an intermediate angle between the first angular position and the second angular position of the rotation restricting portion. In the position, the raw water inlet communication recess of the movable disk releases the communication between the raw water inlet and the raw water outlet extension concave part of the fixed disk, and the water purification port communication concave part of the movable disk is connected to the fixed disk. The purified water outlet and the purified water inlet extension recess communicate with each other, and at the second angular position of the rotation restricting portion, the raw water inlet communication recess of the movable disk is connected to the raw water inlet of the fixed disk and the The fixed state is maintained so that the water outlet extension recess of the movable disk maintains the released state of communication with the water outlet extension recess, and the water purification port communication recess of the movable disk releases the communication between the purified water outlet and the purified water inlet extension recess of the fixed disk. A first angle range of the raw water inlet extension recess of the disc and a second angle range of the purified water inlet extension recess, and a third angle range of the raw water port communication recess of the movable disc and the water inlet communication A water faucet dedicated to a water purifier, wherein the fourth angle range of the recess is set.   The switching valve cartridge fixes the fixed disk in a relatively unrotatable manner by the holding portion, and disposes the movable disk so as to face the fixed disk, and rotates relative to the fixed disk in the forward and reverse rotation directions. The water faucet for exclusive use of a water purifier according to claim 1, wherein the water faucet is configured as a coverless type switching valve cartridge that does not surround the periphery of the fixed disk and the movable disk while being attached and held so as to be movable.   A third angle range of the raw water port communication recess of the movable disk of the switching valve cartridge is set to the same angle range as a first angle range of the raw water outlet extension recess of the fixed disk, and the water purification port 4. The water purifier dedicated faucet according to claim 1, wherein a fourth angle range of the communication recess is set to be larger than a second angle range of the purified water inlet extension recess.   The rotation drive unit of the drive unit includes a drive shaft that is drivingly connected to the valve mechanism operation member, and a drive connection unit that drives and connects the drive shaft to the movable disk. A shaft is connected to the movable disk to transmit the rotational driving force of the drive shaft to the movable disk, and is engaged with the rotation restricting portion to restrict and prevent further rotation of the drive shaft; 4. The rotation angle range of the movable disk is limited to the predetermined angle range between the first angular position and the second angular position. 5. Water purifier for water purifiers.

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