JP2018044425A - Faucet device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a faucet device which can switch flow passages easily, which is small and which has excellent reliability.SOLUTION: A faucet device 300 includes a water discharge part 302, a first flow passage and a second flow passage. The water discharge part 302 includes a switching valve V1 for switching flow passages, an operation part 320, and a thrust lock mechanism 330 for connecting the operation part 320 and the switching valve V1. The switching valve V1 has a first valve part VG and a second valve part VJ. By the thrust lock mechanism 330, the operation part 320 can take a jump-out position, a push-in position and a maximum push-in position. A valve seat surface has a front facing valve seat surface M1. When the operation part 320 is in the push-in position, a closed state is achieved by a seal member provided at the first valve part VG or the second valve part VJ coming into contact with the front facing valve seat surface M1 from front. A buffer mechanism is provided which includes a stretchable elastic body which expands/contracts according to a movement amount of the operation part 320 from the push-in position to the maximum push-in position.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a faucet device.

  There has been known a faucet device capable of switching a flow path at the push of a button. Japanese Patent No. 3454756 discloses a shower head having a push button using a thrust lock mechanism and using a ball valve as a flow path switching valve.

Japanese Patent No. 3454756

  In the faucet described in Japanese Patent No. 3454756, a ball valve is used as a flow path switching valve. In this ball valve, the packing pedestal, the ball valve body, the valve body support member, and the spring are arranged perpendicular to the movable direction of the switching button, so that the head is likely to be enlarged in the vertical direction. Further, since the two ball valves are arranged in parallel, the head is likely to be further increased in size.

  The inventor has intensively studied a structure that can reduce the size of the head. As a result, it has been found that a new problem can be caused when a thrust lock mechanism is incorporated into a structure capable of reducing the size of the head.

  In the thrust lock mechanism, it is possible to make a mutual transition between a push-in state where the button is pushed in and a pop-out state where the button pops out by simply pressing the button. Therefore, the valve body can be easily switched to two positions. However, in the thrust lock mechanism, the maximum push-in state in which the button is pushed further than the push-in state is passed during the mutual transition. Therefore, an overstroke that is pushed further than the pushed state occurs. In the faucet described in Japanese Patent No. 3454756, since the arrangement of the ball valve body and the packing pedestal is perpendicular to the moving direction of the button, an escape portion for allowing the overstroke is easily formed. Can do. However, it has been found that overstroke becomes a problem in a small and reliable structure.

  In view of the above, an object of the present invention is to provide a faucet device that is small and excellent in reliability while easily switching a flow path.

  A preferable water faucet device according to the present invention includes a water guide section, a water discharge section located on the upstream side of the water guide section and having a discharge port, a first flow path, and a second flow path. The water discharge unit switches a flow path through which water discharge passes, an adjacent part adjacent to the switch valve, an operation unit that can move the switch valve along a specific direction, the operation unit, and the switch valve And a thrust lock mechanism portion connecting the two. The switching valve has a first valve portion that can open and close the first flow path, and a second valve portion that can open and close the second flow path. Due to the movement of the switching valve in the specific direction, the first valve portion is closed and the second valve portion is open, and the first valve portion is open and the first valve portion is open. Mutual transition with the second state in which the two valve portions are in the closed state is possible. The first valve portion and the second valve portion are arranged along the same straight line extending in the specific direction, and move integrally along the specific direction by operation of the operation portion. The thrust lock mechanism unit allows the operation unit to adopt a pop-out position, a push-in position, and a maximum push-in position. The adjacent portion has a forward valve seat surface that can come into contact with the first valve portion or the second valve portion. When the operating portion is in the pushed-in position, the closed state is achieved by a seal member provided in the first valve portion or the second valve portion coming into contact with the forward valve seat surface from the front. A buffer mechanism having a telescopic elastic body that expands and contracts according to the amount of movement of the operation unit from the push-in position to the maximum push-in position is provided between the operation unit, the thrust lock mechanism unit, the switching valve, or between them. The buffer mechanism allows the operation unit to take the maximum pushing position.

  In a preferred first aspect, the buffer mechanism includes the seal member that is externally fitted to the shaft portion of the switching valve and is slidable with respect to the shaft portion, and the seal member that is provided on the switching valve. It is comprised by the said elastic elastic body urged | biased toward back. Preferably, the seal member can move relative to the shaft portion in accordance with a movement amount of the operation portion from the push-in position to the maximum push-in position while being in contact with the forward valve seat surface.

  Preferably, the shaft portion is a shaft portion of the second valve portion. Preferably, when the operation portion is in the pushed-in position, the second valve portion is closed by the seal member provided in the second valve portion coming into contact with the forward valve seat surface from the front. Yes.

  Preferably, the second valve portion has an insertion portion at a rear end portion thereof. Preferably, the adjacent part has an insertion space part. Preferably, a support elastic body is disposed in the insertion space. Preferably, the insertion portion is supported from behind by the support elastic body while being inserted into the insertion space portion.

  A preferred second aspect includes a first slide member and a second slide member in which members constituting the operation portion, the thrust lock mechanism portion or the switching valve are slidably connected to each other. Preferably, the buffer mechanism includes a first slide member, a second slide member, and the elastic elastic body. Preferably, the first slide member and the second slide member are configured to be slidable with respect to each other in the specific direction. Preferably, the elastic elastic body biases the first slide member and the second slide member away from each other. Preferably, the first slide member can slide relative to the second slide member in accordance with a movement amount of the operation unit from the push-in position to the maximum push-in position.

  Preferably, the thrust lock mechanism has a switching shaft. Preferably, the switching shaft is the first slide member. Preferably, the first shaft portion is the second slide member. Preferably, when the operation portion is in the pushed-in position, the seal member provided in the first valve portion comes into contact with the forward valve seat surface from the front, so that the first valve portion is closed. Yes.

  Preferably, the switching valve has a guide portion at a rear end portion thereof. Preferably, the adjacent part has an insertion space part. Preferably, the guide portion moves inside the insertion space portion while being inserted into the insertion space portion.

  It is easy to switch the flow path, and it is possible to obtain a faucet device that is small and excellent in reliability.

FIG. 1 is a side view of the faucet device according to the first embodiment. In FIG. 1, the operation unit is in the pushed-in position. FIG. 2 is a cross-sectional view of the faucet device of FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a side view of the faucet device according to the first embodiment. In FIG. 4, the operation unit is in the pop-out position. FIG. 5 is a cross-sectional view of the faucet device of FIG. 6 is a cross-sectional view taken along line AA in FIG. The lower part of FIG. 7 is an exploded perspective view of the faucet device of FIG. 1, and the upper part of FIG. 7 is a diagram in which each member is cut in half in this exploded perspective view. FIG. 8 is a cross-sectional view of the main part in the first state of the faucet device of FIG. FIG. 9 is a cross-sectional view of the main part of the faucet device of FIG. 1 in the maximum pushed-in state. FIG. 10 is a cross-sectional view of a main part in the second state of the faucet device of FIG. 11A is a perspective view of the shaft body of the first valve portion in the first embodiment, FIG. 11B is a plan view of the shaft body, and FIG. 11C is a side view of the shaft body. FIG. 12A is a perspective view of the shaft body of the second valve portion in the first embodiment, FIG. 12B is a plan view of the shaft body, and FIG. 12C is a side view of the shaft body. FIG. FIG. 13 is a side view of the faucet device according to the second embodiment. In FIG. 13, the operation unit is in the pop-out position. 14 is a cross-sectional view of the faucet device of FIG. FIG. 15 is a cross-sectional view taken along line AA in FIG. FIG. 16 is a side view of the faucet device according to the second embodiment. In FIG. 16, the operation unit is in the pushed-in position. 17 is a cross-sectional view of the faucet device of FIG. 18 is a cross-sectional view taken along line AA in FIG. FIG. 19 is an exploded perspective view of the faucet device of FIG. FIG. 20 is an exploded perspective view in which each member in FIG. 19 is cut in half. FIG. 21 is a cross-sectional view of an essential part in the first state of the faucet device of FIG. FIG. 22 is a cross-sectional view of the main part in the maximum push-in state of the water faucet device of FIG. FIG. 23 is a cross-sectional view of an essential part in the second state of the faucet device of FIG. FIG. 24A is a perspective view of the switching shaft in the second embodiment, FIG. 24B is a perspective view of the switching shaft viewed from another angle, and FIG. FIG. 24D is a side view of the switching shaft. FIG. 25A is a perspective view of the shaft body of the first valve portion in the second embodiment, and FIG. 25B is a perspective view of the shaft body seen from another angle, and FIG. Is a plan view of the shaft body, and FIG. 25 (d) is a side view of the shaft body. FIG. 26A is a perspective view of a shaft body of the second valve portion in the second embodiment, and FIG. 26B is a perspective view of the shaft body viewed from another angle, and FIG. Is a plan view of the shaft body, and FIG. 26D is a side view of the shaft body. FIG. 27 is a cross-sectional view of an essential part of the faucet device of the third embodiment. FIG. 27 is a cross-sectional view when the operation unit is in the protruding position. FIG. 28 is a cross-sectional view of a main part of the faucet device of the third embodiment. FIG. 28 is a cross-sectional view when the operation unit is at the maximum pushing position. FIG. 29 is a cross-sectional view of an essential part of the faucet device of the third embodiment. FIG. 29 is a cross-sectional view when the operation unit is in the pushed-in position. FIG. 30 is an exploded plan view, an exploded cross-sectional view, and an exploded side view of the faucet device of the third embodiment in order from the top. Fig.31 (a) is a perspective view of the shaft body of the raw | natural water valve part which concerns on 3rd Embodiment, FIG.31 (b) is a perspective view of this shaft body seen from another angle, FIG. c) is a side view of the shaft body. Fig.32 (a) is a perspective view of the shaft body of the water purification valve part which concerns on 3rd Embodiment, FIG.32 (b) is a perspective view of this shaft body seen from another angle, FIG. c) is a side view of the shaft body. FIG. 33 (a) is a perspective view of a valve joint according to the third embodiment, FIG. 33 (b) is a perspective view of the valve joint viewed from another angle, and FIG. It is a side view of this valve joint. FIG. 34 is a partial cross-sectional perspective view showing a shaft body, a valve joint, a second switching case, a switching shaft and the like in the assembled water discharge section. This perspective view is a view as seen obliquely from the rear. FIG. 35 is a partial cross-sectional perspective view showing a valve joint, a shaft body, a third switching case, and the like in the assembled water discharger. This perspective view is a view as seen obliquely from the front. FIG. 36 is an enlarged sectional view showing the vicinity of the raw water sealing member. FIG. 37A and FIG. 37B are cross-sectional views for explaining the displacement and deformation of the seal member due to the fluid.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

[First Embodiment]
FIG. 1 is a side view of a faucet device 300 according to the first embodiment, and FIG. 2 is a cross-sectional view of the faucet device 300. 3 is a cross-sectional view taken along the line AA in FIG. In FIG. 1 to FIG. 3, the operation button is in the pushed-in position.

  4 is a side view of the faucet device 300, FIG. 5 is a cross-sectional view of the faucet device 300, and FIG. 6 is a cross-sectional view taken along line AA of FIG. 4 to 6, the operation button is in the pop-out position.

The faucet device 300 is a faucet device with a water purifying function capable of switching discharged water between raw water and purified water. In the faucet device 300, the relationship between the position of the operation button and the water discharge switching is as follows.
(1a) When the operation button is in the push-in position (button depression), raw water is discharged.
(1b) When the operation button is in the pop-out position (button protrusion), purified water is discharged.

  The faucet device 300 includes a water guiding unit 302 and a water discharging unit 304. As shown in FIG. 2, the water guide section 302 includes a cavity for arranging the water purification cartridge 306 and a water purification cartridge 306 inserted into the cavity. This water purification cartridge 306 is replaceable. In addition, illustration of the water purification cartridge 306 is abbreviate | omitted in sectional drawings other than FIG.

  The water purification cartridge 306 has a water permeable portion 306a containing a water purification material and a hollow portion 306b. The shape of the water permeable portion 306a is substantially cylindrical. Although not shown, a typical water permeable portion has a water purification material, an outer filtration layer, and an inner filtration layer. The water purification material contains, for example, activated carbon as a main component. For example, a nonwoven fabric is used for the outer filtration layer and the inner filtration layer. A ceramic having a sterilizing effect may be employed for the outer filtration layer and / or the inner filtration layer. An ion exchanger may be employed for the outer filtration layer and / or the inner filtration layer. The outer filtration layer may be a plurality of layers. The inner filtration layer may be a plurality of layers.

  The water permeable part 306a can permeate | transmit water. The raw water is purified by passing through the water permeable portion 306a. The raw water is purified by passing through the water purification material from the outside of the water permeable portion 306a and reaching the hollow portion 306b.

  In the water guide portion 302, a gap channel GW1 is formed between the inner surface that defines the cavity and the water permeable portion 306a (the outer surface thereof). The gap channel GW1 is a first channel of the water guide section 302. In the second state, the raw water reaches the first flow path GW2 of the water discharge section 104 from the first flow path GW1 of the water guide section 302 without passing through the water permeable section 306a. The raw water reaches the water outlet 110 from the first flow path GW2 and is discharged.

  Thus, in this embodiment, raw | natural water flow paths GW1 and GW2 are 1st flow paths. This raw water channel is an example of a first channel. In the present invention, the type of water passing through the first flow path is not limited.

  In the water guide part 302, the hollow part 306b of the water purification cartridge 306 is a purified water flow path JW1. The purified water channel JW1 is a second channel of the water guide section 302. In the first state (purified water discharge state), the purified water reaches from the purified water flow path JW1 to the purified water flow path JW2 of the water discharger 104. The purified water is discharged from the purified water flow path JW2 to the water outlet 110.

  Thus, in this embodiment, the purified water flow paths JW1 and JW2 are the second flow paths. This water purification channel is an example of a second channel. In the present invention, the type of water passing through the second flow path is not limited. In addition, in this embodiment, although the kind of water differs between two flow paths, this invention is not limited to such a case. For example, the kind of water may be the same between the first channel and the second channel, and the water outlet may be different.

  In the first state (purified water discharge state), foreign matter or the like adheres to the outer surface of the water permeable portion 306a. However, the foreign matter and the like are discharged together with the raw water in the second state (raw water discharge state). Therefore, clogging of the water purification cartridge 306 is suppressed. The water purification performance of the water purification cartridge 306 is maintained for a long time.

  The faucet device 300 can be used by being detached from the faucet body. In this case, the water guide part 302 functions as a grip part.

  The water discharge unit 304 is located on the upstream side of the water guide unit 302. The water discharger 304 constitutes the tip of the faucet device 300.

  The water discharge unit 304 has a water discharge port 310. Water is discharged from the water outlet 310. Either purified water or raw water is discharged from the water outlet 310.

  The lower part of FIG. 7 is an exploded perspective view of the water discharger 304. The upper part of FIG. 7 is an exploded perspective view of the water discharger 304 in which each member is cut along the center line.

  The water discharge unit 304 includes an operation unit 320. The operation unit 320 is a push button. The push button 320 functions as a switching button for switching between the first flow path and the second flow path.

  The water discharger 304 includes an alternate operation type push button mechanism 330. Each time the push button 320 is pressed by the push button mechanism 330, the position of the push button 320 is switched between a pop-out position and a push-in position.

  As shown in FIG. 7, the push button mechanism 330 includes a first switching top 332, a second switching top 334, a switching ring 336, a switching shaft 338, a first switching case 340, an O-ring 342, a second switching case 344, a packing. 346, a third switching case 348, an O-ring 350, a coil spring CS1, and a coil spring CS2. Further, the water discharger 304 has a head 352.

  When the push button 320 moves in the front-rear direction (axial direction, specific direction), the first switching top 332 moves in the front-rear direction together with the second switching top 334 and the switching shaft 338. The second switching top 334 rotates each time the button is pressed, and the axial position of the second switching top 334 relative to the switching ring 336 is switched each time the button is pressed. As a result, the push button 320 is held at two different positions (the pop-out position and the push-in position).

  The push button mechanism 330 is a thrust lock mechanism. This thrust lock mechanism is widely used as a button mechanism. The thrust lock mechanism is also used in, for example, a ballpoint pen, and allows the ballpoint pen core to be inserted and removed. For example, Japanese Patent No. 3454756 and Japanese Patent No. 5721679 also employ this thrust lock mechanism. The thrust lock mechanism 330 of this embodiment is the same as the mechanism described in these patent publications.

  8, 9, and 10 are cross-sectional views illustrating the main part of the water discharge unit 304. FIG. 8 is a cross-sectional view when the operation unit 320 is in the pop-out position (button protrusion). FIG. 9 is a cross-sectional view when the operation unit 320 is at the maximum pushing position. FIG. 10 is a cross-sectional view when the operation unit 320 is in the pushed-in position (button depression).

  The thrust lock mechanism 330 is an alternate operation mechanism. The details of the alternate operation of the thrust lock mechanism 330 are as follows. When the operation unit 320 at the pop-out position (button protrusion) is pressed, the operation unit 320 moves to the most depressed position (maximum depressed position). When the pressing is released, the operation unit 320 moves from the maximum pushing position to the pushing position (button depression) and stops. This pushing position is maintained unless the pressing force is applied again. Next, when the operation unit 320 at the push-in position is pressed, the operation unit 320 moves to the maximum push-in position. When the pressing is released, the operation unit 320 moves from the maximum push-in position to the pop-out position (button protrusion) and stops. In this way, every time the operation unit 320 is pressed, the operation unit 320 alternately stops at the pop-out position and the push-in position, and the maximum push-in position is routed at each transition. The movable range of the operation unit 320 is from the pop-out position to the maximum pushing position.

  As described above, the water faucet device 300 includes the second flow path that passes through the water purification material and reaches the water discharge port 310, and the first flow path that reaches the water discharge port 310 without passing through the water purification material. Have.

  The water discharger 304 has a switching valve V1 that switches whether the water discharged from the water discharge port 310 is raw water or purified water. As shown in FIG. 7, the switching valve V1 has a first valve portion VG that can open and close the first flow path, and a second valve portion VJ that can open and close the second flow path.

  The first valve part VG and the second valve part VJ are directly connected. The positional relationship between the first valve part VG and the second valve part VJ does not change. Details of this connection structure will be described later.

  The first valve portion VG includes a shaft body Z1 and a first valve seal member S1. The first valve seal member S1 is an O-ring. The first valve portion VG has one first valve seal member S1.

  The second valve part VJ has a shaft body Z2 and a second valve seal member S2. The second valve seal member S2 is an O-ring. The second valve portion VJ has one second valve seal member S2.

  The first valve part VG and the second valve part VJ connected to each other move integrally. The first valve part VG and the second valve part VJ are interlocked with each other. When the first valve part VG is in the closed state, the second valve part VJ is in the open state. When the first valve part VG is in the open state, the second valve part VJ is in the closed state.

  In the present application, a first state and a second state are defined. The first state means a state in which the first valve part VG is in a closed state and the second valve part VJ is in an open state. In this embodiment, purified water is discharged in the first state (see FIG. 8). The second state means a state in which the first valve part VG is in an open state and the second valve part VJ is in a closed state. In this embodiment, raw water is discharged in the second state (see FIG. 10).

  11A is a perspective view of the shaft body Z1 of the first valve portion VG, FIG. 11B is a plan view of the shaft body Z1, and FIG. 11C is a side view of the shaft body Z1. . The shaft body Z1 has a front end portion 360 that engages with the thrust lock mechanism portion 330 (the switching shaft 338 thereof) and a rear end portion 362 that engages with the shaft body Z2. Furthermore, the shaft body Z1 has a seal holding part 364 to which the first valve seal member S1 is attached. The seal holding portion 364 includes a front flange 366 that supports the first valve seal member S1 from the front, and a rear flange 368 that supports the first valve seal member S1 from the rear. Between the front end portion 360 and the seal holding portion 364, a large diameter portion 370 including the front end portion 360, a middle diameter portion 372 located behind the large diameter portion 370, and a rear side of the middle diameter portion 372 And a small-diameter portion 374 located at the same position.

  The rear end 362 includes an insertion portion 376 that is inserted into the shaft body Z2 and an engagement protrusion 378 that engages with the shaft body Z2.

  12A is a perspective view of the shaft body Z2 of the second valve portion VJ, FIG. 12B is a plan view of the shaft body Z2, and FIG. 12C is a side view of the shaft body Z2. . The shaft body Z2 includes a front end portion 390 that engages with the shaft body Z1 (a rear end portion 362 thereof), a cylindrical outer peripheral surface portion 392 that includes the front end portion 390 and forms an outer peripheral surface having a constant outer diameter, A flange 394 provided behind the cylindrical outer peripheral surface portion 392 and a rear end portion 396 provided behind the flange 394 are provided.

  The inside of the cylindrical outer peripheral surface portion 392 is a cavity, and this cavity opens forward (see the middle stage in FIG. 18). An insertion portion 376 of the shaft body Z1 is inserted into the opened cavity. The front end 390 has an engagement hole 398 that engages with the engagement protrusion 378 of the shaft body Z1.

  As shown in FIGS. 8 to 10, the shaft body Z1 is connected to the shaft body Z2. The shaft body Z2 is provided behind the shaft body Z1 (on the faucet body side). The shaft body Z1 and the shaft body Z2 are arranged along the same straight line extending in a specific direction. That is, the shaft body Z1 and the shaft body Z2 are arranged so that at least a part of the shaft body Z1 and the shaft body Z2 intersects with the straight line. The straight line coincides with the central axis of the shaft body Z1. In this embodiment, this specific direction corresponds to the axial direction of the shaft body Z2. The straight line coincides with the central axis of the shaft body Z2. The shaft body Z1 and the shaft body Z2 are arranged coaxially. Since the engagement protrusion 378 and the engagement hole 398 are engaged, the relative positional relationship between the shaft body Z1 and the shaft body Z2 is unchanged regardless of the operation of the operation unit 320. In the present embodiment, the specific direction matches the axial direction. In the present application, when simply referred to as “axial direction”, the axial direction means the axial direction of the switching valve V1 unless otherwise specified.

  As shown in FIGS. 8 to 10, the first valve portion VG includes a shaft body Z1 and a first valve seal member S1. The shaft body Z1 and the first valve seal member S1 are coaxial.

  As shown in FIGS. 8 to 10, the second valve portion VJ includes a shaft body Z2, a second valve seal member S2, a coil spring CS1, and a packing support T1. The shaft body Z2, the second valve seal member S2, the coil spring CS1, and the packing support T1 are coaxial. The coil spring CS1 and the coil spring CS2 are compression springs.

  As shown in FIGS. 8 to 10, the second valve portion VJ is connected to the faucet body side of the first valve portion VG. Regardless of the operation of the operation unit 320, the relative positional relationship between the first valve unit VG and the second valve unit VJ does not change. The 1st valve part VG and the 2nd valve part VJ are arrange | positioned along the same straight line extended in a specific direction. In the present embodiment, this specific direction matches the axial direction of the second valve portion VJ. The first valve part VG and the second valve part VJ are arranged coaxially. In the present embodiment, the specific direction matches the axial direction.

  As shown in FIGS. 8 to 10, the faucet device 300 (water discharge unit 304) includes a first adjacent part R <b> 1 as an adjacent part, a second adjacent part R <b> 2 as an adjacent part, and a third adjacent part as an adjacent part. Part R3. In the present application, portions adjacent to the switching valve V1 are collectively referred to as adjacent portions. The adjacent part may be composed of one member, or may be composed of two or more members. In the present embodiment, the first adjacent portion R1 is a third switching case 348, the second adjacent portion R2 is a head 352, and the third adjacent portion R3 is a second switching case 344.

  As shown in FIGS. 9 and 10, the first adjacent portion R1 has a first valve inclined surface M2. The first valve inclined surface M2 is an example of a valve seat surface. The first valve inclined surface M2 is a valve seat of the first valve portion VG. The first valve inclined surface M2 is coaxial with the switching valve V1. The first valve inclined surface M2 is inclined with respect to a specific direction (axial direction). The first valve inclined surface M2 is inclined so as to move away from the center line of the shaft body Z1 as it goes rearward in the axial direction of the shaft body Z1 (on the side opposite to the operation unit 320). The first valve inclined surface M2 is a rearward surface. That is, the first valve inclined surface M2 is a rearward valve seat surface. As shown in FIG. 8, the first flow path is closed by the first valve seal member S1 coming into contact with the first valve inclined surface M2. As a result, the raw water is stopped. The first valve seal member S1 contacts the first valve inclined surface M2 from the rear.

  As shown in FIG. 8, the second adjacent portion R2 has a second valve inclined surface K1. The second valve inclined surface K1 is an example of a valve seat surface. The second valve inclined surface K1 is coaxial with the switching valve V1. The second valve inclined surface K1 is inclined with respect to the axial direction (specific direction). The second valve inclined surface K1 is inclined so as to move away from the center line of the shaft body Z2 as it goes forward in the axial direction of the shaft body Z2 (on the operation unit 320 side). The second valve inclined surface K1 is a forward-facing surface. That is, the second valve inclined surface K1 is a forward valve seat surface. As shown in FIG. 10, the second flow path is closed by the second valve seal member S2 coming into contact with the second valve inclined surface K1. As a result, the purified water is stopped. The second valve seal member S2 contacts the second valve inclined surface K1 from the front.

  The second adjacent portion R2 has an insertion space portion U1. The insertion space portion U1 is a space defined by the cylindrical inner surface. The insertion space U1 is a cylindrical cavity. The insertion space U1 is provided on the faucet body side (rear side) of the second valve inclined surface K1. The inner surface of the insertion space U1 is a cylindrical surface. The insertion space U1 is coaxial with the switching valve V1.

  A coil spring CS2 is disposed in the insertion space U1. The coil spring CS2 is an example of a support elastic body referred to in the present application. The outer diameter Q1 (not shown) of the coil spring CS2 (support elastic body) is smaller than the diameter A2 (FIG. 8) of the insertion space U1, but is close to the diameter of the insertion space U1. From the viewpoint of suppressing the inclination of the spring, the difference (A2-Q1) is preferably 1.0 mm or less, more preferably 0.8 mm or less, and more preferably 0.5 mm or less. From the viewpoint of improving the slidability associated with the expansion and contraction of the spring and suppressing damage, the difference (A2-Q1) is preferably 0.1 mm or more, more preferably 0.2 mm or more, and more preferably 0.3 mm or more. The outer diameter Q1 of the coil spring CS2 is measured in a natural state where no external force is acting. The axial direction of the coil spring CS2 coincides with the specific direction. The coil spring CS2 is arranged so that it can expand and contract in the axial direction.

  As described above, the second valve portion VJ has the rear end portion 396 (see FIG. 12). In the present embodiment, the rear end portion 396 constitutes an insertion portion N1 that can enter the insertion space portion U1. The insertion portion N1 prevents the coil spring CS2 from coming into contact with the second valve inclined surface K1. This prevents the second valve inclined surface K1 from being damaged and maintains the sealing performance of the second valve portion VJ.

  The second valve inclined surface K1, which is an example of the valve seat surface, is a valve seat of the second valve portion VJ. As shown in FIG. 21, when the second valve seal member S2 comes into contact with the second valve inclined surface K1, the second valve portion VJ is closed, and the purified water is stopped. As described above, the second valve inclined surface K1 is a forward-facing surface. The second valve inclined surface K1 is a forward valve seat surface. Therefore, the second valve seal member S2 comes into contact with the second valve inclined surface K1 from the front (faucet tip side). The insertion portion N1 is urged toward the faucet tip by a coil spring CS2.

  The insertion portion N1 has a guide portion N2 that can slide with respect to the cylindrical inner surface of the insertion space portion U1. As shown in FIG. 12, the portion protruding outward in the insertion portion N1 (rear end portion 396) is the guide portion N2. In the present embodiment, the guide portions N2 are equally arranged at a plurality of locations (four locations) in the circumferential direction. By the guide portion N2, the insertion portion N1 can stably slide and move inside the insertion space portion U1. The front end of the coil spring CS2 is in contact with the rear end surface of the guide portion N2.

  As described above, the second valve portion VJ has the coil spring CS1 and the packing support T1. As shown in FIG. 7, the packing support T1 is a ring-shaped member. The packing support T1 includes a flange portion T11 and a cylindrical portion T12 having an outer diameter smaller than that of the flange portion T11. The flange portion T11 constitutes the rear end portion of the packing support T1. The cylindrical portion T12 is located in front of the flange portion T11. The inner diameter of the packing support T1 is substantially equal to the outer diameter of the cylindrical outer peripheral surface portion 392 (see FIG. 12) of the shaft body Z2. The outer diameter of the cylindrical portion T12 is substantially equal to the inner diameter of the coil spring CS1. The outer diameter of the packing support T1 is larger than the inner diameter of the coil spring CS1.

  The second valve seal member S2 and the packing support T1 are externally fitted to the cylindrical outer peripheral surface portion 392 of the shaft body Z2. As shown in FIGS. 8 to 10, the packing support T1 is located on the front side of the second valve seal member S2. The second valve seal member S2 is in contact with the rear end surface (flange portion T11) of the packing support T1. Regardless of the position of the switching valve V1, the packing support T1 supports the second valve seal member S2 from the front. A flange 394 (see FIG. 12) is located behind the second valve seal member S2. The outer diameter of the flange 394 is smaller than the inner diameter of the insertion space portion U1.

  The coil spring CS1 is disposed between the shaft body Z1 of the first valve portion VG and the packing support body T1. The front end of the coil spring CS1 is in contact with the rear flange 368 of the shaft body Z1. The rear end of the coil spring CS1 is in contact with the flange portion T11 of the packing support T1.

  The second valve seal member S2 and the packing support T1 can slide on the cylindrical outer peripheral surface portion 392. Since this sliding occurs inside the second valve seal member S2, it is also referred to as an inner diameter sliding. The inner diameter sliding has a smaller frictional force and less wear than the outer diameter sliding (described later). The inner diameter sliding contributes to a reduction in operating force and an improvement in durability.

  In the first state (purified water discharge state) shown in FIG. 8, the second valve seal member S2 is separated from the second valve inclined surface K1. In this state, the second valve seal member S2 is sandwiched between the packing support T1 and the flange 394 by the elastic force of the coil spring CS1.

  In the first state shown in FIG. 8, a raw water pool space E1 is formed. A raw water pool space E1 is formed by the first valve portion VG and the adjacent portions (the first adjacent portion R1 and the third adjacent portion R3). In the present embodiment, the raw water pool space E1 is a space between the first valve seal member S1 and the O-ring 342. The O-ring 342 is in contact with the outer peripheral surface of the large-diameter portion 370 of the shaft body Z1, and slides on the outer peripheral surface. This sliding is an inner diameter sliding. In the first state, the raw water is stopped in the raw water pool space E1.

  In the second state (raw water discharge state) shown in FIG. 10, the second valve seal member S2 is in contact with the second valve inclined surface K1. The second valve seal member S2 is pushed forward by the contact, and the inner diameter sliding occurs. Due to this inner diameter sliding, the second valve seal member S2 is (slightly) separated from the flange 394.

  In the second state, the insertion portion N1 is inserted into the insertion space portion U1. The insertion portion N1 is inserted deeper than in the first state. Along with this, the coil spring CS2 is compressed. The length L2b of the coil spring CS2 in the second state is shorter than the length L2a of the coil spring CS2 in the first state.

  In addition, in the second state, the coil spring CS1 is compressed as compared with the first state. The length L1b of the coil spring CS1 in the second state is shorter than the length L1a of the coil spring CS1 in the first state.

  As understood from the occurrence of the inner diameter sliding, the second valve seal member S2 is not fixed to the shaft body Z2. However, in the second state, the contact pressure between the second valve seal member S2 and the second valve inclined surface K1 is secured by the elastic force of the compressed coil spring CS1. For this reason, sealing performance (purified water seal) is achieved.

  In the maximum push-in state shown in FIG. 9, the second valve seal member S2 is in contact with the second valve inclined surface K1 (and thus the purified water is stopped). In the maximum pushed-in state, the same state (in the present embodiment, the second state) as when the operation unit 320 is in the pushed-in position is achieved. Since the position of the second valve inclined surface K1 does not move, as the switching valve V1 moves rearward, the second valve seal member S2 is pushed forward by the second valve inclined surface K1, and the inner diameter sliding is performed. Arise. In the maximum pushing state, the pushing amount of the operation unit 320 is larger than that in the second state. For this reason, the second valve seal member S2 slides further forward with respect to the shaft body Z2 in the process in which the operation unit 320 reaches the maximum pushing position. As a result, the coil spring CS1 is further compressed as compared with the case where the operation unit 320 is in the pushed position. The length L1c of the coil spring CS1 in the maximum pushed-in state is shorter than the length L1b.

  Thus, the coil spring CS1 is an elastic body that expands and contracts according to the amount of movement of the operation unit 320 from the pushed-in position to the maximum pushed-in position. In the present application, this elastic body is referred to as a stretchable elastic body. The coil spring CS1 is an example of a stretchable elastic body.

  In the maximum pushed-in state, the insertion portion N1 is inserted into the insertion space portion U1. In the maximum pushing state, it is inserted deeper than in the second state. Along with this, the coil spring CS2 (support elastic body) is compressed. The length L2c of the coil spring CS2 in the maximum pushed-in state is shorter than the length L2b.

  Due to the maximum pushing position in the thrust lock mechanism, the switching valve V1 is more than in the second state (FIG. 10) in which the second valve seal member S2 is in contact with the second valve inclined surface K1 (forward valve seat surface). Furthermore, it is necessary to move to the faucet body side. The inner diameter sliding allows the movement of the switching valve V1 toward the faucet body (movement after contact) after the first valve seal member S1 contacts the second valve inclined surface K1. The expansion and contraction of the coil spring CS1 and the coil spring CS2 also allows the movement after this contact.

  Thus, due to the thrust lock mechanism, the switching valve V1 moves further rearward (water faucet main body side) than when the operation unit 320 is in the pushed-in position. The rearward movement of the switching valve V1 due to this maximum pushing state is also referred to as an overstroke. The structure in which the insertion portion N1 is inserted into the insertion space portion U1 allows overstroke. Due to the inner diameter sliding, the closed state of the second valve portion VJ is maintained in the maximum pushed-in state.

[Second Embodiment]
FIG. 13 is a side view of a faucet device 600 according to the second embodiment, and FIG. 14 is a cross-sectional view of the faucet device 600. FIG. 15 is a cross-sectional view taken along line AA in FIG. In FIG. 13 to FIG. 15, the operation button is in the pop-out position.

  16 is a side view of the faucet device 600, FIG. 17 is a cross-sectional view of the faucet device 600, and FIG. 18 is a cross-sectional view taken along line AA of FIG. 16 to 18, the operation button is in the pushed-in position.

The faucet device 600 is a faucet device with a water purifying function capable of switching the discharged water between raw water and purified water. In the water faucet device 600, the relationship between the position of the operation button and the water discharge switching is as follows.
(2a) When the operation button is in the pop-out position (button protrusion), raw water is discharged.
(2b) When the operation button is in the pushed position (button depression), clean water is discharged.

  The faucet device 600 includes a water guiding unit 602 and a water discharging unit 604. Similar to the water faucet device 300 described above, the water guide section 302 has a cavity for placing the water purification cartridge and a water purification cartridge inserted into the cavity. In the sectional view of the water faucet device 600, the water purification cartridge is not shown.

  The faucet device 600 can be used by being detached from the faucet body. In this case, the water guide part 602 functions as a grip part.

  The water discharger 604 is located on the upstream side of the water conduit 602. The water discharger 604 constitutes the tip of the faucet device 600.

  The water discharge unit 604 has a water discharge port 610. Water is discharged from the water outlet 610. Either purified water or raw water is discharged from the water outlet 610.

  FIG. 19 is an exploded perspective view of the water discharger 604. FIG. 20 is an exploded perspective view of the water discharger 604 in which each member is cut along the center line.

  The water discharge unit 604 includes an operation unit 620. The operation unit 620 is a push button. The push button 620 functions as a switching button that switches between the first flow path and the second flow path.

  The water discharger 604 has an alternate operation type thrust lock mechanism 630. Each time the push button 620 is pressed by the thrust lock mechanism 630, the position of the push button 620 is switched between a pop-out position and a push-in position.

  As shown in FIGS. 18 and 19, the thrust lock mechanism 630 includes a first switching top 632, a second switching top 634, a switching ring 636, a switching shaft 638, a coil spring CS1, a switching cover 640, a button case 642, an O It has a ring 644, a seal plate 646, a spring support 648, and a coil spring CS2. Further, the water discharger 604 has a head 652. The coil spring CS1 and the coil spring CS2 are compression springs.

  When the push button 620 moves in the front-rear direction (axial direction, specific direction), the first switching top 632 moves in the front-rear direction together with the second switching top 634 and the switching shaft 638. The second switching top 634 rotates every time the button is pressed, and the axial position of the second switching top 634 with respect to the switching ring 636 is switched each time the button is pressed. As a result, the push button 620 is held at two different positions (first position and second position).

  21, 22, and 23 are cross-sectional views illustrating the main part of the water discharger 604. FIG. 21 is a cross-sectional view when the operation unit 620 is in the pushed-in position (button depression). FIG. 22 is a cross-sectional view when the operation unit 620 is at the maximum pushing position. FIG. 23 is a cross-sectional view when the operation unit 620 is in the pop-out position (button protrusion).

  The details of the alternate operation of the thrust lock mechanism 630 are as follows. When the operation unit 620 at the pop-out position (button protrusion) is pressed, the operation unit 620 moves to the most depressed position (maximum depressed position). When the pressing is released, the operation unit 620 moves from the maximum pushing position to the pushing position (button depression) and stops. This pushing position is maintained unless the pressing force is applied again. Next, when the operation unit 620 at the push-in position is pressed, the operation unit 620 moves to the maximum push-in position. When the pressing is released, the operation unit 620 moves from the maximum pushing position to the pop-out position (button protrusion) and stops. In this way, every time the operation unit 620 is pressed, the operation unit 620 alternately stops at the pop-out position and the push-in position, and the maximum push-in position is routed at each transition. The movable range of the operation unit 620 is from the pop-out position to the maximum push-in position.

  Similar to the faucet device 300, the faucet device 600 has a second flow path that passes through the water purification material and reaches the water outlet 610, and a first flow that reaches the water outlet 610 without passing through the water purification material. Road.

  The water discharger 604 has a switching valve V1 that switches whether the water discharged from the water discharge port 610 is raw water or purified water. As shown in FIGS. 19 and 20, the switching valve V <b> 1 has a first valve part VG that can open and close the first flow path, and a second valve part VJ that can open and close the second flow path.

  The first valve part VG and the second valve part VJ are directly connected. The positional relationship between the first valve part VG and the second valve part VJ does not change. Details of this connection structure will be described later.

  The first valve portion VG includes a shaft body Z1 and a first valve seal member S1. The first valve seal member S1 is an O-ring. The first valve portion VG has one first valve seal member S1.

  The second valve part VJ has a shaft body Z2 and a second valve seal member S2. The second valve seal member S2 is an O-ring. The second valve portion VJ has one second valve seal member S2.

  As shown in FIGS. 21 to 23, the first valve portion VG and the second valve portion VJ connected to each other move integrally. The first valve part VG and the second valve part VJ are interlocked with each other. When the first valve part VG is in the closed state, the second valve part VJ is in the open state. When the first valve part VG is in the open state, the second valve part VJ is in the closed state.

  As described above, the first state in the present application is a state in which the first valve portion VG is in the closed state and the second valve portion VJ is in the open state. FIG. 21 shows the first state. Note that FIG. 22 (the state where the operation unit 620 is at the maximum pushing position) is also the first state. In this embodiment, purified water is discharged in the first state. The second state means a state in which the first valve part VG is in an open state and the second valve part VJ is in a closed state. FIG. 23 shows the second state. In this embodiment, raw water is discharged in the second state.

  24A is a perspective view of the switching shaft 638, FIG. 24B is a perspective view of the switching shaft 638 viewed from another angle, and FIG. 24C is a plan view of the switching shaft 638. FIG. 24D is a side view of the switching shaft 638.

  The switching shaft 638 has a main shaft portion 638a and a left and right extending portion 638b positioned in front of the main shaft portion 638a. As shown in FIG. 18, the left and right extending part 638 b is in contact with the inner surface of the operation part 620. The switching shaft 638 is fixed to the operation unit 620 by the left and right extending portions 638 b being fitted inside the operation unit 620. The switching shaft 638 moves integrally with the operation unit 620. The left and right extending portion 638b contributes to the stability of the posture of the switching shaft 638.

  As shown in FIG. 24A, the switching shaft 638 has a rearward surface 638c. The rearward surface 638c is located at the front end of the main shaft portion 638a. The rearward surface 638c is a step surface formed at the boundary between the main shaft portion 638a and the left and right extending portion 638b.

  The main shaft portion 638a has a root portion 638d and a tip portion 638e. The root portion 638d forms a large-diameter cylindrical surface. The distal end portion 638e is located behind the root portion 638d. The tip portion 638e constitutes the tip portion of the switching shaft 638. The tip 638e forms a small diameter cylindrical surface.

  The distal end portion 638e has a protrusion 638f. The cross-sectional shape of the protrusion 638f is non-circular. As will be described later, the tip 638e is coupled to the shaft body Z1.

  FIG. 25A is a perspective view of the shaft body Z1 of the first valve portion VG, FIG. 25B is a perspective view of the shaft body Z1 viewed from another angle, and FIG. It is a top view of the body Z1, FIG.25 (d) is a side view of the shaft body Z1.

  The shaft body Z1 has a front end portion 660 that engages with the switching shaft 638 of the thrust lock mechanism portion 630, and a rear end portion 662 that engages with the shaft body Z2. Furthermore, the shaft body Z1 has a seal holding part 664 to which the first valve seal member S1 is attached. The seal holding part 664 includes a front flange 666 that supports the first valve seal member S1 from the front, and a rear flange 668 that supports the first valve seal member S1 from the rear. The first valve seal member S <b> 1 is disposed in a circumferential groove formed by the front flange 666 and the rear flange 668.

  As shown in FIG. 25B, the front end 660 has a slide hole 670. The tip end portion 638 e of the switching shaft 638 is inserted into the slide hole 670. The distal end portion 638e can slide in the axial direction (specific direction) inside the slide hole 670. However, the distance of this slide is regulated within a predetermined range. When the forward sliding distance of the switching shaft 638 with respect to the shaft body Z1 reaches a predetermined value, the protrusion 638f engages with the rearward surface 672 of the slide hole 670 (see FIG. 25A), and further sliding is restricted. Has been.

  The rear end portion 662 has an engaging portion 674. The engaging portion 674 is provided at the distal end portion of the rear end portion 662. The cross-sectional shape of the engaging portion 674 is non-circular. As will be described later, the engaging portion 674 engages with the shaft body Z2.

  26 (a) is a perspective view of the shaft body Z2 of the second valve portion VJ, FIG. 26 (b) is a perspective view of the shaft body Z2 viewed from another angle, and FIG. 26 (c) is a shaft body. It is a top view of Z2, FIG.26 (d) is a side view of the shaft body Z2.

  The shaft body Z2 has a front end portion 690 that engages with the shaft body Z1 (the rear end portion 662 thereof), and a rear end portion 692 that constitutes the rear end surface of the shaft body Z2. The rear end portion 692 has a flange shape as a whole. A flange 694 is provided between the front end portion 690 and the rear end portion 692. The front end 690 supports the second valve seal member S2 from the front. The rear end portion 692 supports the second valve seal member S2 from the rear. The second valve seal member S2 is disposed in a circumferential groove formed by the flange 694 and the rear end 692.

  As shown in FIG. 26B, the front end 690 has an engagement hole 696. The engaging portion 674 of the shaft body Z1 is engaged with the engaging hole 696.

  As shown in FIGS. 21 to 23, the shaft body Z1 is connected to the shaft body Z2. The shaft body Z2 is provided behind the shaft body Z1 (on the faucet body side). The shaft body Z1 and the shaft body Z2 are arranged along the same straight line extending in a specific direction. That is, the shaft body Z1 and the shaft body Z2 are arranged so that at least a part of the shaft body Z1 and the shaft body Z2 intersects with the straight line. The straight line coincides with the central axis of the shaft body Z1. In this embodiment, this specific direction corresponds to the axial direction of the shaft body Z2. The straight line coincides with the central axis of the shaft body Z2. The shaft body Z1 and the shaft body Z2 are arranged coaxially. Since the engaging portion 674 and the engaging hole 696 are engaged, the relative positional relationship between the shaft body Z1 and the shaft body Z2 is unchanged regardless of the operation of the operation portion 620. In the present embodiment, the specific direction matches the axial direction.

  As shown in FIGS. 21 to 23, the first valve portion VG includes a shaft body Z1 and a first valve seal member S1. The first valve seal member S1 is fixed to the shaft body Z1. The shaft body Z1 and the first valve seal member S1 are coaxial. The second valve part VJ has a shaft body Z2 and a second valve seal member S2. The shaft body Z2 and the second valve seal member S2 are coaxial.

  The second valve portion VJ is connected to the faucet body side of the first valve portion VG. Regardless of the operation of the operation unit 620, the relative positional relationship between the first valve unit VG and the second valve unit VJ does not change. Regardless of the operation of the operation unit 620, the relative positional relationship between the first valve seal member S1 and the second valve seal member S2 does not change. The 1st valve part VG and the 2nd valve part VJ are arrange | positioned along the same straight line extended in a specific direction. In the present embodiment, this specific direction matches the axial direction of the second valve portion VJ. The first valve part VG and the second valve part VJ are arranged coaxially. In the present embodiment, the specific direction matches the axial direction.

  As shown in FIGS. 21 to 23, the faucet device 600 (water discharger 604) has an adjacent part R1. In the present embodiment, the adjacent portion R1 is the head 652.

  As shown in FIGS. 21 to 22, the adjacent portion R1 has a first valve inclined surface M1. The first valve inclined surface M1 is an example of a valve seat surface. The first valve inclined surface M1 is a valve seat of the first valve portion VG. The first valve inclined surface M1 is coaxial with the switching valve V1. The first valve inclined surface M1 is inclined with respect to a specific direction (axial direction). The first valve inclined surface M1 is inclined so as to move away from the center line of the shaft body Z1 as it goes forward (on the operation unit 620 side) in the axial direction of the shaft body Z1. The first valve inclined surface M1 is a forward-facing surface. That is, the first valve inclined surface M1 is a forward-facing valve seat surface. As shown in FIG. 21, the first flow path is closed by the first valve seal member S1 coming into contact with the first valve inclined surface M1. As a result, the raw water is stopped. The first valve seal member S1 comes into contact with the first valve inclined surface M1 from the front.

  As shown in FIGS. 21 to 23, the adjacent portion R1 has a second valve inclined surface K2. The second valve inclined surface K2 is an example of a valve seat surface. The second valve inclined surface K2 is coaxial with the switching valve V1. The second valve inclined surface K2 is inclined with respect to the axial direction (specific direction). The second valve inclined surface K2 is inclined so as to move away from the center line of the shaft body Z2 as it goes rearward in the axial direction of the shaft body Z2 (on the side opposite to the operation portion 620). The second valve inclined surface K2 is a rearward surface. That is, the second valve inclined surface K2 is a backward valve seat surface. As shown in FIG. 23, the second valve seal member S2 comes into contact with the second valve inclined surface K2, whereby the second flow path is closed. As a result, the purified water is stopped. The second valve seal member S2 contacts the second valve inclined surface K2 from the rear.

  As shown in FIG. 23, the adjacent portion R1 has an insertion space portion U1. The insertion space portion U1 is a space defined by the cylindrical inner surface. The insertion space U1 is a cylindrical cavity. The insertion space portion U1 is provided on the faucet body side (rear side) of the second valve inclined surface K2. The inner surface of the insertion space U1 is a cylindrical surface. The insertion space U1 is coaxial with the switching valve V1. The rear end portion 692 of the shaft body Z2 moves inside the insertion space portion U1.

  The rear end portion 692 of the shaft body Z2 constitutes an insertion portion N1 provided at the rear end portion of the switching valve V1. The insertion portion N1 has a guide portion N2 that can slide with respect to the cylindrical inner surface of the insertion space portion U1. As shown in FIG. 26, the portion protruding outward in the insertion portion N1 (rear end portion 692) is the guide portion N2. In the present embodiment, the guide portions N2 are equally arranged at a plurality of locations (four locations) in the circumferential direction. By the guide portion N2, the insertion portion N1 can stably slide and move inside the insertion space portion U1.

  As shown in FIGS. 21 to 23, the coil spring CS1 is disposed between the rearward surface 638c of the switching shaft 638 and the switching cover 640 (the frontward surface thereof). The switching cover 640 has a through hole 640a (FIG. 20), and the main shaft portion 638a (the root portion 638d) of the switching shaft 638 passes through the through hole 640a (FIGS. 21 to 23). The rear end of the coil spring CS1 is in contact with the switching cover 640 around the through hole 640a. A main shaft portion 638a (base portion 638d) of the switching shaft 638 is inserted inside the coil spring CS1. The switching shaft 638 slides on the inner surface of the through hole 640a. Note that an O-ring 644 and a seal plate 646 are disposed in order to prevent water leakage from the gap between the through hole 640a and the switching shaft 638. The O-ring 644 and the seal plate 646 are fixed to the switching cover 640. The main shaft portion 638a (base portion 638d) of the switching shaft 638 slides inside the O-ring 644 (inner diameter sliding). In addition, the main shaft portion 638a (root portion 638d) of the switching shaft 638 passes through the through hole of the seal plate 646, and slides inside the through hole.

  Regardless of the position of the switching shaft 638 (operation unit 620), the coil spring CS1 biases the switching shaft 638 forward. The switching cover 640 is fixed to the head 652, while the switching shaft 638 moves with respect to the head 652 together with the operation unit 620. Therefore, the length of the coil spring CS1 completely reflects the moving distance of the switching shaft 638 (operation unit 620). In other words, the length of the coil spring CS1 changes with the same length as the moving distance of the switching shaft 638 (operation unit 620).

  Accordingly, the length L1b of the coil spring CS1 in the state where the operation unit 620 is in the protruding position (second state) is the longest (FIG. 23). The length L1a of the coil spring CS1 in the state where the operation unit 620 is in the pushed-in position (first state) is shorter than the length L1b (FIG. 21). The length L1c of the coil spring CS1 in a state where the operation unit 620 is at the maximum pushing position (maximum pushing state) is shorter than the length L1a (FIG. 22).

  As described above, the coil spring CS1 is a component of the alternate operation type thrust lock mechanism 630. The coil spring CS1 bears the driving force of the thrust lock mechanism by biasing the switching cover 640 forward.

  As shown in FIGS. 21 to 23, the coil spring CS <b> 2 is arranged between the shaft body Z <b> 1 (first valve portion VG, switching valve V <b> 1) and the switching shaft 638. The coil spring CS2 biases the shaft body Z1 (first valve portion VG, switching valve V1) and the switching shaft 638 in a direction to separate them from each other. In other words, the coil spring CS2 urges the switching shaft 638 forward relative to the shaft body Z1 (first valve portion VG, switching valve V1).

  The front end of the coil spring CS2 is supported by a spring support 648. The spring support 648 is fixed to the switching shaft 638. More specifically, the spring support 648 is fixed to a step surface 638g (FIG. 24A) located between the root portion 638d and the tip portion 638e. On the other hand, the rear end of the coil spring CS2 is abutted against the front flange 666 of the shaft body Z1. A front end 660 (see FIGS. 25A to 25D) of the shaft body Z1 is inserted inside the coil spring CS2.

  As described above, the tip end portion 638 e of the switching shaft 638 can slide in the slide hole 670 of the front end portion 660. By this slide mechanism, the relative position between the switching shaft 638 and the shaft body Z1 (first valve portion VG, switching valve V1) changes. Due to this change, the length of the coil spring CS2 also changes (see FIGS. 21 to 23).

  In the state where the operation portion 620 is in the protruding position (second state, FIG. 23), the first valve seal member S1 is not in contact with the forward valve seat surface M1, so that the force for compressing the coil spring CS2 is not applied. . Therefore, the coil spring CS2 extends to the limit of regulation of the slide mechanism. The length L2b of the coil spring CS2 in a state where the operation unit 620 is in the protruding position is the maximum.

  In a state where the operation portion 620 is in the pushed-in position (first state, FIG. 21), the first valve seal member S1 contacts the forward valve seat surface M1, and the shaft body Z1 (first valve portion VG, switching valve V1) is brought into contact. In contrast, the switching shaft 638 slides backward. For this reason, the coil spring CS2 is compressed. The length L2a of the coil spring CS2 in a state where the operation unit 620 is in the pushing position is shorter than the length L2b.

  In a state where the operation unit 620 is in the maximum pushed-in position (FIG. 22), the switching shaft 638 slides further backward with respect to the shaft body Z1 (first valve unit VG, switching valve V1). For this reason, the coil spring CS2 is further compressed. The length L2c of the coil spring CS2 in a state where the operation unit 620 is at the maximum pushing position is shorter than the length L2a.

  Unlike the coil spring CS1, the change in the length of the coil spring CS2 does not completely reflect the moving distance of the switching shaft 638 (operation unit 620). At the stage where the first valve seal member S1 is not in contact with the forward valve seat surface M1, the length of the coil spring CS2 does not change regardless of the position of the operation portion 620. In a state where the first valve seal member S1 is in contact with the forward valve seat surface M1, the change in the length of the coil spring CS2 completely reflects the moving distance of the switching shaft 638 (operation unit 620).

  Thus, due to the thrust lock mechanism, the switching valve V1 moves further rearward (water faucet main body side) than when the operation unit 620 is in the pushing position. That is, the above-described overstroke occurs. The slide mechanism and the coil spring CS2 allow this overstroke.

[Third Embodiment]

  FIGS. 27, 28 and 29 are cross-sectional views showing the main part of the water discharger 904 in the faucet device 900 of the third embodiment.

  FIG. 27 is a cross-sectional view when the operation unit 920 is in the pop-out position. FIG. 28 is a cross-sectional view when the operation unit 920 is at the maximum pushing position. FIG. 29 is a cross-sectional view when the operation unit 920 is in the pushed-in position.

The faucet device 900 is a faucet device with a water purifying function capable of switching discharged water between raw water and purified water. In the faucet device 900, the relationship between the position of the operation button and the water discharge switching is as follows.
(3a) When the operation button (operation unit 920) is in the pushed-in position (button depression), raw water is discharged.
(3b) When the operation button (operation unit 920) is in the protruding position (button protrusion), purified water is discharged.

  The faucet device 900 includes a water guiding unit 902 and a water discharging unit 904. Although not shown in its entirety, the structure of the water guide 902 is the same as that of the other embodiments. The water guiding section 902 includes a cavity for arranging the water purification cartridge and a water purification cartridge arranged in the cavity. This water purification cartridge is replaceable. This water purification cartridge is the same as the water purification cartridge 106 described above.

  The water discharger 904 is located on the upstream side of the water guide 902. The water discharger 904 constitutes the tip of the faucet device 900.

  The water discharger 904 has a water discharge port (not shown). Water is discharged from the water outlet. Either purified water or raw water is discharged from the spout.

  The upper part of FIG. 30 is an exploded plan view of the water discharger 904. The middle part of FIG. 30 is an exploded cross-sectional view of the water discharger 904. The lower part of FIG. 30 is an exploded side view of the water discharger 904.

  The water discharge unit 904 includes an operation unit 920. The operation unit 920 is a push button. The push button 920 functions as a switching button for switching between the raw water channel and the purified water channel.

  The water discharger 904 has an alternate operation type push button mechanism 930. Each time the push button 920 is pressed by the push button mechanism 930, the position of the push button 920 is switched between the first position (projecting position) and the second position (pressing position).

  As shown in FIG. 30, the push button mechanism 930 includes a connecting member 931, an O-ring 933, a first switching top 932, a second switching top 934, a switching ring 936, a switching shaft 938, a first switching case 940, and an O-ring 942. , Second switching case 944, packing 946, third switching case 948, O-ring 950, coil spring CS1 and coil spring CS2. Further, the water discharger 904 has a head 952. The connection member 931 connects the operation unit 920 and the first switching top 932.

  This push button mechanism 930 also uses a thrust lock mechanism. Similar to the push button mechanism 330 described above, this push button mechanism 930 is an alternate operation type push button mechanism.

  The alternate operation of the push button mechanism 930 is the same as in the first and second embodiments described above.

  The faucet device 900 has a purified water passage that passes through the water purification material and reaches the water outlet, and a raw water passage that reaches the water outlet without passing through the water purification material. The purified water channel and the raw water channel up to the water discharger 904 are the same as the faucet device 300 described above. The raw water channel is an example of a first channel. The purified water channel is an example of a second channel.

  The water discharger 904 has a switching valve V1 that switches whether the water discharged from the water discharge port is raw water or purified water. As shown in FIG. 30, the switching valve V1 includes a raw water valve portion VG that can open and close the raw water flow channel, and a water purification valve portion VJ that can open and close the purified water flow channel. Furthermore, the switching valve V1 has a valve joint Z3. The raw water valve part VG is an example of a first valve part. The purified water valve part VJ is an example of a second valve part.

  The raw water valve portion VG and the water purification valve portion VJ are indirectly connected through a valve joint Z3. The positional relationship between the raw water valve part VG and the water purification valve part VJ changes. Details of this connection structure will be described later.

  The raw water valve portion VG includes a shaft body Z1 and a raw water seal member PK1. The raw water seal member PK1 is a packing. The raw water valve portion VG has a raw water seal member PK1. The raw water seal member PK1 is an example of a first valve seal member.

  The purified water valve portion VJ includes a shaft body Z2 and a purified water seal member S2. The purified water seal member S2 is an O-ring. The water purification valve portion VJ has a water purification seal member S2. The purified water seal member S2 is an example of a second valve seal member.

  One end of the valve joint Z3 is connected to the shaft body Z1. The other end of the valve joint Z3 is connected to the shaft body Z2.

  Fig. 31 (a) is a perspective view of the shaft body Z1 of the raw water valve portion VG, Fig. 31 (b) is a perspective view of the shaft body Z1 viewed from another angle, and Fig. 31 (c) is a shaft body Z1. FIG. The shaft body Z1 has a front end portion 960 that engages with the push button mechanism 930 (the switching shaft 938 thereof), and a rear end portion 962 that engages with the valve joint Z3. Furthermore, the shaft body Z1 has a seal holding part 964 to which the raw water seal member PK1 is attached. The seal holding part 964 includes a front flange 966 that supports the raw water seal member PK1 from the front, and a rear flange 968 that supports the raw water seal member PK1 from the rear. Between the front end portion 960 and the seal holding portion 964, a large diameter portion 970 including the front end portion 960 and an intermediate portion 972 located behind the large diameter portion 970 are provided. The intermediate portion 972 has a shape in which two flat plates intersect at a right angle.

  The rear end portion 962 includes an insertion portion 976 that is inserted into the valve joint Z3, and an engagement protrusion 978 that engages with the valve joint Z3.

  Fig. 32 (a) is a perspective view of the shaft body Z2 of the water purification valve portion VJ, Fig. 32 (b) is a perspective view of the shaft body Z2 viewed from another angle, and Fig. 32 (c) is a shaft body Z2. FIG. The shaft body Z2 has a front end portion 990 that engages with the valve joint Z3, and a rear end portion 994 provided behind the front end portion 990. The front end 990 is an example of a slide end.

  The front end portion 990 includes a central shaft portion 996 and a rail portion 998. The central shaft portion 996 extends along the center line of the shaft body Z2. The rail portion 998 is provided on the central shaft portion 996. The rail portion 998 extends along the central shaft portion 996. A plurality of (two) rail portions 998 are provided. The plurality of rail portions 998 are arranged equally (every 180 °) in the circumferential direction of the central shaft portion 996.

  The front end portion 990 has an engagement protrusion 1000. The engagement protrusion 1000 is provided on the central shaft portion 996.

  The rear end 994 has a seal holding part 1002. The seal holding part 1002 forms a circumferential groove that holds the purified water sealing member S2. The packing holding part 1002 has a front flange 1004 that supports the purified water seal member S2 from the front, and a rear flange 1006 that supports the purified water seal member S2 from the rear. A purified water seal member S2 is disposed between the front flange 1004 and the rear flange 1006.

  33 (a) is a perspective view of the valve joint Z3, FIG. 33 (b) is a perspective view of the valve joint Z3 viewed from another angle, and FIG. 33 (c) is a side view of the valve joint Z3. . The valve joint Z3 has a front end portion 1110 that engages with the shaft body Z1 and a rear end portion 1112 that engages with the shaft body Z2.

  Further, the valve joint Z <b> 3 has a support protrusion 1114. The support protrusion 1114 extends outward. In the present embodiment, four support protrusions 1114 are provided. The support protrusion 1114 has a rear end surface 1116. The rear end surface 1116 is parallel to a plane perpendicular to the center line of the valve joint Z3.

  The front end portion 1110 has a large-diameter inner surface 1120, an annular step surface 1122, and a small-diameter inner surface 1124 (see FIG. 33A). The large-diameter inner surface 1120 is a circumferential surface. The large-diameter inner surface 1120 extends rearward from the front end surface of the valve joint Z3. The small diameter inner surface 1124 is a circumferential surface. The diameter of the small inner surface 1124 is smaller than the diameter of the large inner surface 1120. The small diameter inner surface 1124 is located behind the large diameter inner surface 1120. The annular step surface 1122 is located at the boundary between the large-diameter inner surface 1120 and the small-diameter inner surface 1124. The annular step surface 1122 connects the large-diameter inner surface 1120 and the small-diameter inner surface 1124. The annular step surface 1122 is a surface facing forward. The large-diameter inner surface 1120, the annular step surface 1122, and the small-diameter inner surface 1124 are coaxial.

  The rear end portion 1112 forms a cylindrical portion 1125 as a whole. The rear end portion 1112 has a circumferential outer surface 1126 and a slide portion 1127. The slide part 1127 has a shaft insertion hole 1128 and a slit 1130. The circumferential outer surface 1126 constitutes the outer surface of the cylindrical portion 1125.

  The shaft insertion hole 1128 is formed along the center line of the cylindrical portion 1125. The shaft insertion hole 1128 extends along the center line of the valve joint Z3. The shaft insertion hole 1128 is released toward the rear (see FIG. 33B).

  The slit 1130 extends along the center line of the valve joint Z3. The slit 1130 extends in the same direction as the shaft insertion hole 1128. A plurality (two) of slits 1130 are provided. The plurality of slits 1130 are arranged evenly (every 180 °) around the center line of the valve joint Z3. The slit 1130 penetrates between the shaft insertion hole 1128 and the outside of the valve joint Z3. As a result, the cylindrical portion 1125 is divided into two. The slit 1130 is released toward the rear (see FIG. 33C).

  The shaft body Z1 and the shaft body Z2 are connected through such a valve joint Z3.

  As shown in FIGS. 27, 28, and 29, the engagement protrusion 978 of the shaft body Z1 is engaged with a recess formed in the valve joint Z3. In this manner, the rear end portion 962 of the shaft body Z1 is engaged with the valve joint Z3. The relative positional relationship between the shaft body Z1 and the valve joint Z3 does not change regardless of the position of the operation unit 920 (the pop-out position, the push-in position, the maximum push-in position, etc.).

  As shown in FIGS. 27, 28 and 29, the front end 990 of the shaft body Z2 is inserted into the shaft insertion hole 1128 (see FIG. 33B) of the valve joint Z3. As can be seen by comparing FIG. 27 to FIG. 29, the front end portion 990 can slide in the shaft insertion hole 1128. That is, the shaft body Z2 and the valve joint Z3 are connected to each other in a slidable state. The faucet device 900 includes a first slide member and a second slide member that are slidably connected to each other. The valve joint Z3 is an example of a first slide member. The shaft body Z2 is an example of a second slide member. FIG. 27 shows a state in which the valve joint Z3 slides forward most with respect to the shaft body Z2. In this state, the engagement protrusion 1000 of the shaft body Z2 is in contact with the step surface of the valve joint Z3.

  By the slide movement, the relative positional relationship between the shaft body Z2 and the valve joint Z3 changes. The shaft body Z2 and the valve joint Z3 can move relative to each other along the specific direction (the front-rear direction). Accordingly, the shaft body Z1 and the shaft body Z2 can move relative to each other. The shaft body Z1 and the shaft body Z2 are connected so that they can move relative to each other along the specific direction (the front-rear direction).

  The position of the slide mechanism is not limited. For example, the shaft body Z1 may be a first slide member, and the valve joint Z3 may be a second slide member. In this case, the stretchable elastic body (coil spring CS1) is disposed between the shaft body Z1 and the valve joint Z3.

  FIG. 34 is a partial cross-sectional perspective view showing the shaft body Z2, the valve joint Z3, the second switching case 944, the switching shaft 938, and the like in the assembled water discharger 904. This perspective view is a view as seen obliquely from the rear. In the cross section of this perspective view, the rear end portion 1112 of the valve joint Z3 and the central shaft portion 996 and the rail portion 998 of the shaft body Z2 inserted therein are shown. As shown in this figure, a central shaft portion 996 is slidably inserted into the shaft insertion hole 1128. Further, the rail portion 998 of the shaft body Z2 is slidably inserted into the slit 1130 of the valve joint Z3. With these structures, the valve joint Z3 and the shaft body Z2 are slidably connected to each other. Thus, the valve joint Z3 that connects the raw water valve portion VG and the water purification valve portion VJ has the slide portion 1127. The water purification valve portion VJ has a front end portion 990 that can slide in a specific direction in the slide portion 1127.

  A coil spring CS1 is disposed between the shaft body Z2 and the valve joint Z3. As shown in FIGS. 27 to 29, the front end of the coil spring CS1 is in contact with the valve joint Z3. The rear end of the coil spring CS1 is in contact with the shaft body Z2 (the front flange 1004). The coil spring CS1 urges the shaft body Z2 and the valve joint Z3 in a direction to separate them from each other. Regardless of the relative positional relationship between the shaft body Z2 and the valve joint Z3, the coil spring CS1 urges the shaft body Z2 and the valve joint Z3 in a direction to separate them from each other.

  The shaft body Z2, the valve joint Z3, and the coil spring CS1 constitute a buffer mechanism that allows overstroke. This buffer mechanism includes a stretchable elastic body that expands and contracts according to the amount of movement of the operation unit 920 from the push-in position to the maximum push-in position. In the present embodiment, a coil spring CS1 is employed as the stretchable elastic body. This buffer mechanism allows the operation unit 920 to take the maximum pushing position.

  Thus, the said buffer mechanism has a 1st slide member, a 2nd slide member, and an expansion-contraction elastic body. The first slide member and the second slide member are configured to be slidable with respect to each other in a specific direction. The elastic elastic body urges the first slide member and the second slide member in a direction separating them from each other. The first slide member can slide relative to the second slide member in accordance with the amount of movement of the operation unit 920 from the push position to the maximum push position. The valve joint Z3 is an example of a first slide member. The shaft body Z2 is an example of a second slide member. The (small diameter) coil spring CS1 is an example of a stretchable elastic body.

  FIG. 35 is a partial cross-sectional perspective view showing the valve joint Z3, the shaft body Z1, the third switching case 948, the shaft body Z1 and the like in the assembled water discharger 904. This perspective view is a view as seen obliquely from the front.

  In FIG. 35, the intermediate part 972 of the shaft body Z1 is shown in cross section. As shown in FIGS. 27 to 29, the intermediate portion 972 is inserted into the insertion cavity portion 949 of the third switching case 948. As FIG. 35 shows, the intermediate part 972 is comprised by the several (4 sheets) plate-shaped part arrange | positioned equally in the circumferential direction. The intermediate portion 972 is guided by the insertion cavity portion 949 and moves in the specific direction (front-rear direction). As shown in FIG. 35, the structure of the intermediate portion 972 ensures a space in the insertion cavity portion 949 in a state where the intermediate portion 972 is inserted. This space functions as a raw water flow path. The intermediate portion 972 is an example of an insertion guide portion that is guided while being inserted into the insertion cavity portion 949. The insertion guide portion (intermediate portion 972) is configured to ensure a space in the insertion cavity portion 949 while being guided by the insertion cavity portion 949. This space secures a fluid (raw water) flow path.

  Thus, the adjacent part (third switching case 948) has the insertion cavity part 949 through which the raw water valve part VG can be inserted. The raw water valve portion VG has an insertion guide portion 972 that is guided while being inserted into the insertion cavity portion 949 and moves in the specific direction. In this embodiment, it is not necessary to provide the guide portion N2 (see FIG. 8 and the like) at the rear end portion of the switching valve V1. For this reason, the channel area of purified water can be increased.

  In the present embodiment, the raw water valve portion VG (first valve portion) is inserted into the insertion cavity portion, but is not limited to this configuration. For example, the water purification valve part VJ (2nd valve part) may be inserted in the insertion cavity part.

  As shown in FIGS. 27 to 29, the coil spring CS2 is disposed outside the coil spring CS1. The inner diameter of the coil spring CS2 is larger than the outer diameter of the coil spring CS1. The front end of the coil spring CS2 is in contact with the valve joint Z3 (the support protrusion 1114). More specifically, the front end of the coil spring CS2 is in contact with the rear end surface 1116 of the support protrusion 1114. The rear end of the coil spring CS2 is in contact with the head 952. The coil spring CS2 biases the valve joint Z3 forward. Regardless of the position of the valve joint Z3, the coil spring CS2 urges the valve joint Z3 forward.

  The coil spring CS2 is a component part of an alternate operation type thrust lock mechanism. The coil spring CS2 bears the driving force of the thrust lock mechanism by urging the valve joint Z3 forward. Moreover, the coil spring CS2 implement | achieves the state (purified water discharge state) by which the water purification valve part VJ was released by urging | biasing the switching valve V1 ahead.

  When the operation unit 920 is in the protruding position, the raw water seal member PK1 comes into contact with the raw water valve seal surface M3 (FIG. 27). The raw water valve sealing surface M3 is an example of a rearward valve seat surface. The raw water seal member PK1 comes into contact with the rear valve seat surface from the rear. By this contact, the raw water valve portion VG is closed. Moreover, when the operation part 920 exists in the pop-out position, the purified water sealing member S2 is separated from the purified water sealing surface K3. Therefore, the water purification valve part VJ will be in an open state. As a result, purified water is discharged.

  When the operation unit 920 is in the pushing position, the raw water seal member PK1 is separated from the raw water valve seal surface M3 (FIG. 29). Therefore, the raw water valve portion VG is opened. Moreover, when the operation part 920 exists in a pushing position, the purified water sealing member S2 is contact | abutting to the sealing surface K3 for purified water valves. The water-purifying valve sealing surface K3 is an example of a forward-facing valve seat surface. The clean water sealing member S2 contacts the forward valve seat surface K3 from the front. Therefore, the water purification valve part VJ will be in a closed state. As a result, raw water is discharged.

  FIG. 36 is an enlarged cross-sectional view showing the vicinity of the raw water seal member PK1. The seal structure according to the raw water seal member PK1 has a structure that can achieve a more reliable valve seal. Since this seal structure can be widely applied to both the raw water valve part VG and the water purification valve part VJ, the seal structure will be generalized as appropriate below.

  This seal structure has a seal member PK. The raw water seal member PK1 according to the third embodiment is an example of a seal member PK. This seal member PK may be a raw water seal member or a purified water seal member.

  The seal member PK includes a base portion 1200 and a seal portion 1202 that is integrally connected to the base portion 1200. The seal member PK is installed on the first member F1. In the third embodiment, the first member F1 is constituted by a shaft body Z1 and a valve joint Z3. The first member F1 may be a single member or may be composed of two or more members. The bottom surface of the base 1200 (the inner peripheral surface of the seal member PK) is parallel to the center line of the first member F1.

  The 1st member F1 has the installation part 1210 in which at least one part of the base 1200 is installed. The installation portion 1210 is a recess formed toward the center side of the first member F1 (in the radial direction of the shaft body Z1). The bottom surface of the installation part 1210 is parallel to the specific direction. Each of the both side surfaces of the installation part 1210 is perpendicular to the specific direction. In the third embodiment, the installation portion 1210 is a circumferential groove formed by the front flange 966 and the rear flange 968 (see FIGS. 31A to 31C).

  The first member F1 has a first seal contact portion 1212 that contacts the seal portion 1202. The first seal contact portion 1212 is in contact with the rear surface of the seal portion 1202. The first seal contact portion 1212 is perpendicular to the specific direction.

  The second member F2 contacts the seal member PK and achieves valve sealing. In the third embodiment, the second member F2 is a third switching case 948. The third switching case 948 is an example of an adjacent part. The second member F2 may be a single member or may be composed of two or more members. The seal member PK (the first seal contact portion 1202) is compressed between the first member F1 and the second member F2, and seals between the two members.

  The second member F2 has a second seal contact portion 1216 that contacts the seal portion 1202. In the third embodiment, the second seal contact portion 1216 is the raw water valve seal surface M3.

  With the operation of the operation unit 920, the relative position between the first member F1 and the second member F2 changes. The direction of this change is a specific direction. Due to this change, the distance between the first seal contact portion 1212 and the second seal contact portion 1216 changes. Due to this change in distance, the closed state in which the flow path between the first member F1 and the second member F2 is closed, and the open state in which the flow path between the first member F1 and the second member F2 is opened. State is achieved. FIG. 36 shows a closed state.

  In the present embodiment, the second seal contact portion 1216 has a convex portion 1218. The convex part 1218 protrudes rearward in the specific direction. When the second seal contact portion 1216 contacts the seal member PK, the convex portion 1218 bites into the seal member PK. The convex portion 1218 deforms the seal member PK into a shape (concave state) corresponding to the convex portion 1218 (not shown). This deformation improves the sealing performance.

  The installation part 1210 of the first member F1 has a storage part 1220 in which at least a part of the base part 1200 is stored. In the third embodiment, the storage portion 1220 is a recess formed by the shaft body Z1 and the valve joint Z3. The storage unit 1220 is a recess that extends rearward. A part of the base 1200 is accommodated in the recess. Further, the installation part 1210 of the first member F1 has a base part 1222 which is a part other than the storage part 1220. The storage portion 1220 is located behind the base portion 1222. The storage unit 1220 is located on the opposite side of the base member 1222 from the second member F2.

  The base portion 1200 has a surface 1226 on the seal portion 1202 side. The storage portion 1220 has a base holding surface 1228 that abuts the surface 1226 of the base 1200. The base restraining surface 1228 is parallel to the specific direction. The base holding surface 1228 is in contact with the outer peripheral surface of the storage portion 1220.

  The first member F1 has a cover portion 1230. The cover portion 1230 is located on the radially outer side of the seal member PK. The cover portion 1230 abuts on the surface 1232 on the opposite side of the base portion 1200 in the seal portion 1202 of the seal member PK. Cover portion 1230 is in contact with the outer peripheral surface of seal portion 1202.

  The seal member PK has a surface 1240 that contacts the second seal contact portion 1216. The surface 1240 is perpendicular to the specific direction. The angle θ1 shown in FIG. 36 is an angle formed by the change direction DR1 of the relative position between the first member F1 and the second member F2 and the surface 1240. From the viewpoint of suppressing wear and damage to the seal portion 1202, this angle is preferably substantially vertical (80 to 100 degrees), more preferably 85 to 95 degrees, and still more preferably 90 degrees. In the present embodiment, the change direction DR1 is a specific direction.

  In the embodiment of FIG. 36, the first member F1 is constituted by the shaft body Z1 and the valve joint Z3, and the second member F2 is constituted by the third switching case 948. However, it goes without saying that the present invention is not limited to this form. The 1st member F1 and the 2nd member F2 should just be in the relationship which can change a mutual relative position. A member constituting at least a part of one of the switching valve V1 and the adjacent portion is defined as a first member F1. A member constituting at least a part of the switching valve V1 or the other of the adjacent portions is a second member F2.

  As described above, in the third embodiment, the large-diameter coil spring CS2 and the small-diameter coil spring CS1 are used. Of these, the coil spring CS2 plays the same role as the supporting elastic body described above.

  In the first embodiment and the like, the switching valve V1 is supported while being urged forward by providing a support elastic body (coil spring CS2) in the insertion space U1. By this energization, a state where the water purification valve portion VJ is released is achieved. Also in the third embodiment, the large-diameter coil spring CS2 urges the switching valve V1 forward, and the state in which the water purification valve portion VJ is released is achieved by this urging.

  On the other hand, unlike the first embodiment, in the third embodiment, the large-diameter coil spring CS2 is arranged not around the switching valve V1 but around (outside) the switching valve V1. In this configuration, it is not necessary to provide a spring receiving surface on the rear end surface of the shaft body Z2 in the water purification valve portion VJ. Therefore, the channel area of running water can be increased. Further, in the configuration in which the coil spring as the support elastic body is inserted into the insertion space U1, the flow path area is determined by the inner diameter of the spring, so that the flow path area is further smaller than the insertion space U1. On the other hand, in the third embodiment, since there is no spring that further narrows the flow path area of the insertion space U1, the flow path area increases. In addition, the coil spring CS2 disposed around (outside) the switching valve V1 has a large inner diameter and does not narrow the purified water flow path.

  With respect to the third embodiment, the configuration of FIG. 36 contributes to increasing the stability of the seal.

  In the embodiment of FIGS. 37 (a) and 37 (b), the seal member S1 is disposed on the movable shaft body Z1, and the valve is closed when the seal member S1 contacts the seal surface A1. FIG. 37A shows a state immediately before the closed state. In FIG. 37A, the curved arrow indicates the flow of the fluid (water). In the state of FIG. 37 (a), the water flow area is small, so the flow rate of the fluid is large. For this reason, in the surface of the seal member S1, the pressure of the portion that is in contact with the fluid is reduced, and a differential pressure is generated. Due to this differential pressure, a radially outward force is applied to the seal member S1 (see the black arrow in FIG. 37A). Further, the drag force from the fluid acts on the seal member S1 displaced radially outward (fluid side). Accordingly, the seal member S1 is displaced and / or deformed so as to expand outward in the radial direction (see FIG. 37B). When such displacement and / or deformation occurs, a leak (leakage) may occur from the seal surface A1 or the seal surface A2.

  On the other hand, in the embodiment of FIG. 36, the displacement and deformation of the seal member PK are suppressed by the installation portion 1210, the storage portion 1220, and the base restraining surface 1228. Further, the cover portion 1230 further suppresses the displacement and deformation of the seal member PK.

  The above-described differential pressure increases as the flow velocity increases. Therefore, the displacement and deformation of the seal member PK are larger as the flow velocity is larger. The pressure of raw water is greater than the pressure of purified water. Therefore, displacement and deformation of the seal member PK are likely to occur in the raw water valve. From this viewpoint, the embodiment of FIG. 36 is preferably applied to the raw water valve. The seal member PK in the embodiment of FIG. 36 is preferably the raw water seal member PK1.

  In Embodiment 1 to 3 demonstrated above, the 1st valve part VG and the 2nd valve part VJ are arrange | positioned along the same straight line extended along a specific direction (movement direction of the switching valve V1). Therefore, the water discharge part can be downsized. In addition, since the movement direction of the operation unit matches the movement direction of the switching valve V1, the operation force is transmitted without waste and reliably. For this reason, it is excellent in operativity and opening-and-closing certainty.

  In the faucet described in Japanese Patent No. 3454756 described above, the valve is closed by fitting the ball valve into the valve seat. Therefore, a large operating force may be required when removing the ball valve from the fitting. Since a large operating force is required, the durability of the operation unit can be adversely affected. Moreover, the corner | angular part of opening of a valve seat part may wear with a ball valve, and a closure failure may arise. On the other hand, in Embodiments 1 and 2, since the valve is opened and closed only by moving the switching valve V1 in the axial direction, the above-described problem relating to the ball valve can be solved.

  In the first valve portion VG and the second valve portion VJ described in the above embodiment, there are two possible forms for closing the valve. A 1st form is a structure which abuts a seal member (for example, O ring) on the inner surface of the cylindrical cavity part extended in an axial direction. This configuration is also referred to as a diameter seal. Note that sliding with the cylindrical surface outside the seal member is also referred to as outer diameter sliding. The two embodiments described above do not employ a diameter seal. On the other hand, a face seal is employed in the above embodiment. In the present application, the “face seal” is defined as a concept including an inclined face seal and a vertical face seal. An inclined surface seal means the structure where the surface which contact | abuts a sealing member inclines with respect to the moving direction of the said sealing member. In the first and second embodiments described above, all the valves are inclined surface seals. On the other hand, the vertical surface seal means a configuration in which the surface in contact with the seal member is perpendicular to the moving direction of the seal member. Note that the second seal contact portion 1216 shown in FIG. 36 has a convex portion 1218 formed on a vertical surface, and the tangent line of the vertex of the convex portion 1218 is perpendicular to the moving direction of the seal member PK. Thus, it can be considered as an example of a vertical surface seal.

  The diameter seal has an effect that the position of the seal can vary in the axial direction. This contributes to the tolerance of the overstroke described above. On the other hand, in the case of a diameter seal, since the seal member slides on the inner surface of the cylinder, the seal member is likely to deteriorate. This deterioration causes a seal failure. Further, since this diameter seal requires grease, operation failure occurs due to the grease being cut.

  On the other hand, in the face seal, since there is no sliding with the contact surface, the seal member is hardly deteriorated. In addition, greaseless operation is possible, and operation failure due to grease breakage does not occur.

  Furthermore, the face seal has an effect of increasing the cross-sectional area of the flow path. In the case of the diameter seal, the insertion length is essential because the seal member is inserted into the inner surface of the cylindrical surface more or less. The seal member moves by a predetermined stroke between the open state and the closed state of the valve, but the distance between the open end of the cylindrical inner surface and the seal member in the open state is obtained by subtracting the insertion length from the stroke. It becomes. The stroke cannot be used as the channel width by the amount of the insertion length, and the channel cross-sectional area is reduced. On the other hand, in the face seal, since the insertion length is zero, the distance between the valve seat surface and the seal member in the open state is equal to the stroke. That is, the stroke can be used as the channel width. Therefore, the cross-sectional area of the flow path becomes large.

  In the first embodiment, the second embodiment, and the third embodiment described above, face seals are employed in the first valve portion VG and the second valve portion VJ. For this reason, the channel cross-sectional area is increased in both the first channel and the second channel. Further, the deterioration of the seal member is suppressed, and the grease is realized.

The specifications of the first valve part VG and the second valve part VJ include the following configurations.
(A) The first valve portion VG is a face seal and the second valve portion VJ is a face seal.
(B) The first valve portion VG is a face seal, and the second valve portion VJ is a diameter seal.
(C) The first valve portion VG is a diameter seal, and the second valve portion VJ is a face seal.

  In the face seal relating to the forward valve seat surface, neither the seal position nor the seal member can move backward. Therefore, in any of the configurations (a) to (c), the problem of the overstroke can occur. Any one of the first valve portion VG and the second valve portion VJ is a face seal, the valve seat surface in the face seal is a forward valve seat surface, and the forward facing when the operation portion is in the push-in position. When the face seal on the valve seat surface is in the closed state, the problem of overstroke becomes obvious. In any of the above configurations (a) to (c), the present invention having a buffer mechanism against overstroke can be applied.

  Preferably, as in (a) above, the first valve portion VG and the second valve portion VJ are face seals. By using both as a face seal, the above-mentioned disadvantages of the diameter seal can be avoided, and the above-mentioned advantages of the face seal can be fully utilized. In the first embodiment, the second embodiment, and the third embodiment described above, this configuration (a) is adopted.

In the configuration (a), preferably, the following configuration (a1) or (a2) is employed.
(A1) The valve seat surface in the face seal of the first valve portion VG is a forward valve seat surface, and the valve seat surface in the face seal of the second valve portion VJ is a backward valve seat surface.
(A2) The valve seat surface in the face seal of the first valve portion VG is a backward valve seat surface, and the valve seat surface in the face seal of the second valve portion VJ is a forward valve seat surface.

  The configuration (a1) is employed in the faucet device 600 according to the second embodiment. The configuration (a2) is employed in the faucet device 300 according to the first embodiment and the faucet device 900 according to the third embodiment.

  As in the above configurations (a1) and (a2), by combining the forward valve seat surface and the rear valve seat surface, the first state (the first valve portion VG is in the closed state and the second valve portion VJ is opened). The switching valve V1 in the axial direction (specific direction, front-rear direction) is switched between the second state (the first valve portion VG is open and the second valve portion VJ is closed). It can be realized by moving only. Therefore, a flow path switching mechanism can be realized with a simple structure. This structure contributes to the improvement of the reliability and operability of the water stop, and also contributes to the miniaturization of the water head.

  In any of the above-described embodiments, the operation unit, the thrust lock mechanism unit, and the switching valve are connected to move in the same direction (specific direction, axial direction, post-war direction). A buffer mechanism is preferably provided from the viewpoint of dealing with the overstroke while maintaining operability.

  This buffer mechanism is provided in the operation part, the thrust lock mechanism part, the switching valve, or between them. Preferably, the buffer mechanism includes a stretchable elastic body that expands and contracts according to the amount of movement of the operation unit from the push-in position to the maximum push-in position.

   In the present application, the operation unit, the thrust lock mechanism unit, and the switching valve are collectively referred to as an operation transmission unit. In order to cope with the above-described overstroke, it is preferable to provide a slide mechanism that absorbs the overstroke in the operation transmission unit, or to allow the seal member to slide in the switching valve. In any case, after the overstroke is resolved, it is necessary to return to the original state. The stretchable elastic body contracts as necessary when an overstroke occurs, and expands to return the peripheral member to its original state when the overstroke is eliminated. For this reason, the state in which the mutual transition between the first state and the second state is possible is maintained.

  In the first embodiment (FIGS. 8 to 10) described above, the coil spring CS1 is an elastic elastic body. In the second embodiment (FIGS. 21 to 23), the coil spring CS2 is a stretchable elastic body. In the third embodiment (FIGS. 27 to 29), the small-diameter coil spring CS1 is a stretchable elastic body. In these embodiments, an extension spring (compression coil spring) is employed as an example of the extension elastic body.

  As an example of a preferable buffer mechanism, a buffer mechanism having the following configurations (x1) and (x2) can be given. This buffer mechanism is provided in the first embodiment (see FIGS. 8 to 10).

(X1) A seal member (second valve seal member S2) in which the buffer mechanism is externally fitted to the shaft portion of the switching valve V1 and is slidable with respect to the shaft portion; and the seal member provided on the switch valve V1 It is comprised by the expansion-contraction elastic body (coil spring CS1) which urges | biases (2nd valve seal member S2) toward back.
(X2) The seal member (second valve seal member S2) is in contact with the forward-facing valve seat surface K1, and with respect to the shaft portion according to the movement amount of the operation unit 320 from the push-in position to the maximum push-in position. Can move.

  With this configuration (x1) and (x2), the seal member S2 moves relative to the switching valve V1. For this reason, it is possible to cope with an overstroke while the face seal cannot be moved (FIG. 9). Further, after the overstroke is eliminated by the elastic elastic body CS1, the seal member S2 returns to the original position. For this reason, the seal | sticker in the 2nd valve part VJ in a 2nd state is also achieved reliably.

  In the first embodiment, the shaft portion on which the seal member S2 is fitted is the shaft portion of the second valve portion VJ. This configuration can be preferably applied to a configuration in which the valve seat surface K1 related to the second valve portion VJ is a forward facing surface. In the first embodiment, when the operation portion 320 is in the pushed-in position, the seal member S2 provided on the second valve portion VJ comes into contact with the forward valve seat surface K1 from the front, so that the second valve portion VJ is It is in the closed state. With this configuration, the above-described face seal is achieved, so that the advantage of the face seal is obtained. Moreover, since the problem of an overstroke becomes obvious with this configuration, the above-described buffer mechanism is preferably applied.

  As described above, the seal member S2 can move relative to the shaft portion (can slide on the inner diameter). From this viewpoint, the seal member S2 is also referred to as a movable seal member. In the first embodiment, the overstroke is absorbed by changing the relative positional relationship between the first valve portion VG (switching valve V1) and the movable seal member S2 (second valve seal member).

  In the first embodiment, the movable seal member S2 is provided in the second valve portion VJ. However, the movable seal member may be provided in the first valve portion VG.

  Further, in the first embodiment, the second valve portion VJ has an insertion portion N1 at its rear end (FIGS. 8 to 10). Moreover, the adjacent part R2 has the insertion space part U1. A coil spring CS2 (support elastic body) is disposed in the insertion space U1. This configuration allows the movement of the switching valve V1 due to the overstroke. Further, the insertion portion N1 stabilizes the posture of the switching valve V1 during movement. The support elastic body CS2 expands and contracts according to the position of the switching valve V1, and contributes to the stable movement of the switching valve V1. Further, the support elastic body CS2 constantly biases the switching valve V1 forward, and functions as a driving force for the thrust lock mechanism.

  Other examples of preferable buffer mechanisms include buffer mechanisms having the following configurations (y1) to (y4). This buffer mechanism is provided in the second embodiment (FIGS. 21 to 23) and the third embodiment (FIGS. 27 to 29). In the following descriptions from (y1) to (y4), the symbols of the second embodiment are given to represent both.

(Y1) The members constituting the operation unit 620, the thrust lock mechanism unit 630, or the switching valve V1 include a first slide member 638 and a second slide member Z1 that are slidably connected to each other.
(Y2) The buffer mechanism is constituted by the first slide member 638, the second slide member Z1, and the stretchable elastic body CS2.
(Y3) The 1st slide member 638 and the 2nd slide member Z1 are comprised so that a slide movement is mutually possible in a specific direction (front-back direction, an axial direction).
The elastic elastic body urges the first slide member and the second slide member in a direction separating them from each other.
(Y4) The first slide member 638 can slide relative to the second slide member Z1 in accordance with the amount of movement of the operation unit 620 from the push position to the maximum push position.

  In the second embodiment, the first slide member is the switching shaft 638, and the second slide member is the shaft body Z1 (first valve portion VG). The first slide member (switching shaft 638) and the second slide member (shaft body Z1) are arranged coaxially. The first slide member (switching shaft 638) and the second slide member (shaft body Z1) can adjust the mutual positional relationship while transmitting the movement of the operation unit 620 to the switching valve V1. In this embodiment, the relative positional relationship between the first slide member (switching shaft 638) and the second slide member (shaft body Z1, first valve portion VG) changes. For this reason, an overstroke can be absorbed. Of course, the first slide member and the second slide member are not limited to the above-described members, and may be connected to each other so as to be slidable.

  In the third embodiment, the first slide member is the valve joint Z3, and the second slide member is the shaft body Z2. The first slide member (valve joint Z3) and the second slide member (shaft body Z2) are arranged coaxially. The first slide member (valve joint Z3) and the second slide member (shaft body Z2) can adjust the positional relationship of each other while transmitting the movement of the operation unit 920 to the switching valve V1. In this embodiment, the relative positional relationship between the first slide member (valve joint Z3) and the second slide member (shaft body Z2) changes. For this reason, an overstroke can be absorbed.

  In the second embodiment, when the operation part 620 is in the pushed-in position, the seal member S1 (first valve seal member) provided in the first valve part VG is brought into contact with the forward valve seat surface M1 from the front side. The valve part VG is closed (FIG. 21). Therefore, a face seal is formed in which the seal position cannot move backward. Even in such a case, the buffer mechanism can absorb an overstroke.

  In the third embodiment, when the operation unit 920 is in the pushed-in position, the seal member S2 (second valve seal member) provided in the second valve unit VJ comes into contact with the forward-facing valve seat surface K3 from the front, so that the second. The valve part VJ is closed (FIG. 29). Therefore, a face seal is formed in which the seal position cannot move backward. Even in such a case, the buffer mechanism can absorb an overstroke.

  All of the three buffer mechanisms described above maintain the closed state of the forward valve seat surface from the pushing position to the maximum pushing position. Therefore, the flow path is not switched between the pushing position and the maximum pushing position, and the switching between the first state and the second state is stably achieved.

  In the first embodiment, the relative positional relationship between the first valve portion VG (switching valve V1) and the movable seal member S2 (second valve seal member) changes. On the other hand, in the second embodiment, the relative positional relationship between the first slide member (switching shaft 638) and the second slide member (shaft body Z1, first valve portion VG) changes. In the third embodiment, the relative positional relationship between the first slide member (valve joint Z3) and the second slide member (shaft body Z2) changes. In any of the embodiments, the buffer mechanism changes the relative positional relationship between the seal member in the closed state and the operation unit when the operation unit is in the pushed-in position. For this reason, the overstroke can be absorbed.

Each of the three embodiments described above includes the following configurations (z1) to (z3).
(Z1) The valve seat surface with which one of the first valve portion VG and the second valve portion VJ abuts is a backward valve seat surface, and the valve seat surface with which the other abuts is a forward valve seat surface.
(Z2) When the operating portion is in the pop-out position, the valve portion related to the backward valve seat surface (one of the first valve portion VG or the second valve portion VJ) is in a closed state, and the valve portion related to the forward valve seat surface ( The other of the first valve part VG and the second valve part VJ) is in the open state.
(Z3) When the operating portion is in the pushed-in position, the valve portion related to the backward valve seat surface (one of the first valve portion VG or the second valve portion VJ) is in an open state, and the valve portion related to the forward valve seat surface ( The other of the first valve part VG and the second valve part VJ) is in the closed state.
With these configurations, switching between the first state and the second state by the thrust lock mechanism is smoothly achieved. Further, the problem of overstroke due to the configuration (z3) is solved by the buffer mechanism described above.

  In FIG. 23, a double arrow θ1 indicates an inclination angle of the forward valve seat surface with respect to the moving direction of the switching valve V1. If the angle θ1 is too small, the seal member can easily enter the inner surface of the cylinder, and the disadvantage of the diameter seal (an increase in operating load due to sticking and sliding resistance) can occur. In particular, a strong pressure is likely to act on the forward-facing valve seat surface in a phase of mutual transition between the pushed-in state and the maximum pushed-in state, and the above-described drawbacks are likely to occur. In this respect, the angle θ1 is preferably 20 ° or more, more preferably 30 ° or more, and further preferably 40 ° or more. If the angle θ1 is too large, the depth of the circumferential groove for housing the seal member (O-ring or the like) must be reduced, and as a result, the retainability of the seal member is lowered. Further, the contact of the seal member with the valve seat surface becomes nearly vertical, and it is necessary to increase the elasticity of the coil spring to ensure the sealing performance, resulting in a decrease in operability. From this viewpoint, the angle θ1 is preferably 70 ° or less, more preferably 60 ° or less, and still more preferably 50 ° or less. In each embodiment mentioned above, angle (theta) 1 was 45 degrees.

  In FIG. 22, what is indicated by a double-headed arrow θ2 is the inclination angle of the backward valve seat surface with respect to the moving direction of the switching valve V1. If this angle θ2 is too small, the seal member can easily enter the inner surface of the cylinder, and the disadvantage of the diameter seal (an increase in operating load due to sticking and sliding resistance) can occur. In this respect, the angle θ2 is preferably 20 ° or more, more preferably 30 ° or more, and further preferably 40 ° or more. If the angle θ2 is too large, the depth of the circumferential groove for housing the seal member (O-ring or the like) must be reduced, and as a result, the retainability of the seal member is lowered. Further, the contact of the seal member with the valve seat surface becomes nearly vertical, and it is necessary to increase the elasticity of the coil spring to ensure the sealing performance, resulting in a decrease in operability. From this viewpoint, the angle θ2 is preferably 70 ° or less, more preferably 60 ° or less, and still more preferably 50 ° or less. In the first and second embodiments described above, the angle θ2 is 45 °.

  As described in the above description regarding the face seal, the angles θ1 and θ2 may be 90 °. As can be understood from the embodiment of FIG. 36, high sealing performance can be obtained even when the angles θ1 and θ2 of the valve seat surface are 90 ° or close thereto.

  As shown in FIGS. 12B and 26C, the outer diameter of the guide portion N2 is A1 (mm). On the other hand, the diameter of the cylindrical inner surface of the insertion space portion U1 in which the guide portion N2 is inserted is A2 (mm) (FIGS. 8 and 23). From the viewpoint of slidability and suppression of damage, the difference (A2-A1) is preferably 0.05 mm or more, more preferably 0.1 mm or more, and further preferably 0.15 mm or more. From the viewpoint of suppressing the inclination of the insertion portion N1 or the switching valve V1, the difference (A2-A1) is preferably 1.0 mm or less, more preferably 0.6 mm or less, and still more preferably 0.4 mm or less. In the first embodiment described above, the diameter A1 is 7.2 mm, and the diameter A2 is 7.4 mm.

  From the viewpoint of increasing the flow path cross-sectional area when the second valve portion VJ is opened, the diameter A2 is preferably 3 mm or more, more preferably 5 mm or more, and even more preferably 7 mm or more. From the viewpoint of suppressing an increase in the size of the faucet device, the diameter A2 is preferably 20 mm or less, more preferably 15 mm or less, and even more preferably 10 mm or less.

  The outer diameter A1 of the guide portion N2 is preferably 3 mm or more, more preferably 5 mm or more, and even more preferably 6 mm or more from the viewpoint of securing the flow path area and securing the rigidity required for the guide portion N2. From the viewpoint of suppressing an increase in the size of the faucet device, the outer diameter A1 of the guide portion N2 is preferably 12 mm or less, more preferably 10 mm or less, and even more preferably 8 mm or less.

  The cross-sectional shape of the guide portion N2 may be circular, but a shape other than circular is preferable. In the case of a circular shape, the flow path is only the gap (A2-A1), and a sufficient flow path area cannot be secured. Therefore, it is preferable to divide the guide portion N2. The term “divided” means having an outwardly extending portion that is divided into a plurality of positions in the circumferential direction and extends outward, and the “number of divisions” means the number of the outwardly extending portions. To do. In the case of the first embodiment, the guide portion N2 also serves as a spring presser. In this case, from the viewpoint of the stability of the spring retainer, the number of divisions is preferably at least three. Even if there is no spring as in the second embodiment, the number of divisions is preferably at least three from the viewpoint of the sliding stability of the guide portion N2. If the number of divisions is large, it approaches a circle and the flow area becomes small. Therefore, the number of divisions is preferably 8 or less, more preferably 6 or less, particularly 4 or less.

When the shape is not circular, the guide portion N2 preferably satisfies the following (Configuration a).
(Configuration a) All of the four circumferential regions (90 ° regions) obtained by dividing the guide portion N2 every 90 ° in the circumferential direction include portions that satisfy the numerical limitation of (A2-A1).
In this (configuration a), the distance between the outwardly extending portion and the cylindrical inner surface corresponds to (A2-A1). In addition, although there are a large number of division positions that are divided every 90 ° in the circumferential direction, it is preferable that the above (Configuration a) is satisfied in all the division positions.

In the first embodiment, the front end of the coil spring CS2 is in contact with the end surface (guide portion N2) of the insertion portion N1. As another configuration, for example, the following configuration b is also possible. Even in this configuration, the flow path area is secured. This configuration corresponds to the case where the number of divisions is four.
(B) The insertion portion N1 has a base portion that is a circular plate-like portion and a cross lattice portion that extends from the base portion toward the distal end side and intersects at 90 °. A coil spring CS2 is seated at or near the tip.

  When the cross-sectional shape of the guide portion N2 is other than a circle, the circumscribed circle that circumscribes each of the divided outward extending portions of the guide portion N2 is specified, and the diameter is limited to the above-mentioned numerical value with the diameter of the circumscribed circle as A1 It is good to satisfy.

  A space portion is formed between the adjacent outwardly extending portions. H1 is the total cross-sectional area in the circumscribed circle of the space (the total cross-sectional area obtained by adding up the cross-sectional areas surrounded by the circumscribed circle and the outer contour of the outward extending portion), and H1 represents the area of the circumscribed circle. In the case of H2, the ratio (H1 / H2) is preferably 0.1 or more, more preferably 0.3 or less, particularly 0.5 or more from the viewpoint of securing the channel area. From the viewpoint of ensuring the rigidity and strength required for the guide portion N2, it is preferably 0.9 or less, more preferably 0.8 or less, and particularly preferably 0.7 or less.

  As described above, since the first valve portion VG and the second valve portion VJ are arranged along the same straight line extending in a specific direction (movement direction of the switching valve V1), the water discharge portion can be downsized. .

  In addition, in this application, the front means the faucet front end side. In other words, the front means the operation unit side. In the present application, the rear means the faucet body side. In other words, the rear means the opposite side to the operation unit. Therefore, the front-rear direction in the present application is determined based on the front and the rear. Preferably, the front-rear direction coincides with the specific direction. As described above, the specific direction is the moving direction of the switching valve. In this case, the operation unit side in the specific direction is the front in the specific direction. In this case, the side opposite to the operation unit in the specific direction is the rear in the specific direction. More preferably, the front-rear direction coincides with the axial direction. The axial direction here may be the axial direction of the shaft body Z1, the axial direction of the shaft body Z2, or the axial direction of the switching valve V1. In this case, the operation unit side in the axial direction is the front in the axial direction. In this case, the side opposite to the operation portion in the axial direction is the rear in the axial direction.

  In each embodiment, all the coil springs (elastic bodies) are arranged coaxially with the switching valve V1. Therefore, there is no loss in the transmission of the elastic force to each axis, smooth operation is possible, and it is not necessary to excessively increase the spring elasticity of the coil spring. Moreover, since the structure is simplified, it leads to a reduction in failure and a reduction in cost. In addition, size reduction of the water discharge part is achieved.

  As a material of the shaft body Z1 and the shaft body Z2, a resin is preferable. Examples of preferable resins include polyoxymethylene (POM), polyphenylene sulfide (PPS), acrylonitrile butadiene styrene copolymer (ABS), and polypropylene (PP). From the viewpoint of durability and heat resistance, polyoxymethylene (POM) and polyphenylene sulfide (PPS) are more preferable.

  Examples of the material for the sealing member such as an O-ring include rubber and elastomer. Preferred examples of the rubber include NBR, EPDM, fluorine rubber, and silicon rubber. From the viewpoint of cost and chlorine resistance, and from the viewpoint of low compression set, EPDM and fluororubber are more preferable, and EPDM is more preferable in consideration of cost.

  As described above, according to the present invention, it is possible to obtain a faucet device that is small and excellent in reliability while easily switching the flow path.

  The present application also describes other inventions that are not included in the claimed invention (including independent claims). Each form, member, configuration, and the like described in the claims and embodiments of the present application are recognized as inventions based on the respective functions and effects.

  Each form, member, configuration, etc. shown in each of the above embodiments is not limited to all of the forms, members, or configurations of these embodiments. It can be applied to all described inventions.

  The apparatus described above can be used for faucets of any application.

300, 600 ... Water faucet device 302, 602 ... Water guide part 304, 604 ... Water discharge part 310, 610 ... Water discharge port 320, 620 ... Operation part (button)
330, 630 ... push button mechanism (thrust lock mechanism)
GW1, GW2 ... 1st flow path JW1, JW2 ... 2nd flow path V1 ... Switching valve Z1 ... Shaft body of 1st valve part Z2 ... Shaft body of 2nd valve part VG * ..First valve part VJ ... Second valve part S1 ... Seal member (first valve seal member)
S2 ... Seal member (second valve seal member)
M1 ... Inclined surface for first valve (front-facing valve seat surface)
M2 ... Inclined surface for first valve (backward valve seat surface)
K1 ... Second valve inclined surface (forward-facing valve seat surface)
K2 ... Inclined surface for second valve (backward valve seat surface)
N1 ... Insertion part N2 ... Guide part U1 ... Insertion space part R1, R2, R3 ... Adjacent part CS1, CS2 ... Coil spring (elastic body)

Claims (10)

A water conduit,
A water discharge part located on the upstream side of the water guide part and having a discharge port;
A first flow path;
A second flow path;
Have
The water discharge unit switches a flow path through which water discharge passes, an adjacent part adjacent to the switch valve, an operation unit that can move the switch valve along a specific direction, the operation unit, and the switch valve A thrust lock mechanism that connects the
The switching valve has a first valve part capable of opening and closing the first flow path and a second valve part capable of opening and closing the second flow path;
Due to the movement of the switching valve in the specific direction, the first valve portion is closed and the second valve portion is open, and the first valve portion is open and the first valve portion is open. Mutual transition with the second state in which the two valve parts are closed is possible,
The first valve portion and the second valve portion are arranged along the same straight line extending in the specific direction, and move along the specific direction integrally by operation of the operation portion,
By means of the thrust lock mechanism part, the operation part can take a popping position, a pushing position and a maximum pushing position,
The adjacent portion has a forward-facing valve seat surface that can contact the first valve portion or the second valve portion;
When the operation portion is in the pushed-in position, the closed state is achieved by a seal member provided in the first valve portion or the second valve portion coming into contact with the forward valve seat surface from the front,
A buffer mechanism having a telescopic elastic body that expands and contracts according to the amount of movement of the operation unit from the push-in position to the maximum push-in position is provided between the operation unit, the thrust lock mechanism unit, the switching valve, or between them. A faucet device in which the operation unit is allowed to take the maximum pushing position by the buffer mechanism. The buffer mechanism is externally fitted to the shaft portion of the switching valve and is slidable with respect to the shaft portion, and is provided on the switching valve to urge the seal member rearward. It is comprised with the said elastic elastic body,
2. The water according to claim 1, wherein the seal member is movable with respect to the shaft portion according to a movement amount of the operation portion from the push-in position to the maximum push-in position while being in contact with the forward valve seat surface. Stopper device. The shaft portion is a shaft portion of the second valve portion;
The said 2nd valve part is made into a closed state because the said sealing member provided in the said 2nd valve part contact | abuts to the said front-facing valve seat surface from the front when the said operation part exists in the said pushing position. 4. The faucet device according to 3. The second valve portion has an insertion portion at a rear end thereof;
The adjacent portion has an insertion space portion;
A support elastic body is disposed in the insertion space,
The faucet device according to claim 2 or 3, wherein the insertion portion is supported from behind by the support elastic body while being inserted into the insertion space portion. The operation part, the thrust lock mechanism part or the member constituting the switching valve includes a first slide member and a second slide member that are slidably connected to each other,
The buffer mechanism is composed of a first slide member, a second slide member, and the telescopic elastic body,
The first slide member and the second slide member are configured to be slidable with respect to each other in the specific direction,
The elastic elastic body biases the first slide member and the second slide member away from each other;
The faucet device according to claim 1, wherein the first slide member is slidable with respect to the second slide member in accordance with a movement amount of the operation unit from the push position to the maximum push position. The thrust lock mechanism has a switching shaft;
The switching shaft is the first slide member;
The first shaft portion is the second slide member;
The said 1st valve part is made into a closed state because the said sealing member provided in the said 1st valve part contact | abuts to the said front-facing valve seat surface from the front when the said operation part exists in the said pushing position. 5. The faucet device according to 5. The switching valve has a guide portion at a rear end thereof;
The adjacent portion has an insertion space portion;
The faucet device according to claim 5 or 6, wherein the guide portion moves inside the insertion space portion while being inserted into the insertion space portion. The switching valve further includes a valve joint for connecting the first valve portion and the second valve portion;
The valve joint has a slide portion, and the first valve portion or the second valve portion has a slide end portion that can slide in the specific direction in the slide portion. The faucet device according to any one of 7. The adjacent part has an insertion cavity part through which the first valve part or the second valve part can be inserted;
The said 1st valve part or the said 2nd valve part has an insertion guide part which is guided while being inserted in the said insertion cavity part, and moves to the said specific direction. Faucet device. A supporting elastic body is disposed behind the switching valve;
This supporting elastic body urges the switching valve forward,
The faucet device according to any one of claims 1 to 9, wherein the elastic elastic body is disposed on the switching valve.

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