JP5721679B2 - Faucet device - Google Patents

Description

  The present invention relates to a faucet device and its operation button mechanism.

  A water faucet device capable of switching the flow path is known. As such a faucet device, one having an operation button mechanism for performing a switching operation of a flow path is known. FIG. 20 shows an example of the operation button mechanism 202 provided in the faucet device. In this figure, illustration of many portions of the flow path switching mechanism 220 including the valve of the faucet device is omitted. In this figure, the left is the front in the direction X, and the right is the rear in the direction X. An arrow W in the figure indicates the direction of water discharge. The operation button mechanism 202 includes an operation button 204, a first switching member 206, a second switching member 208, a switching ring 210, a switching shaft member 212, a coil spring 214, and a switching cover 216. The switching shaft member 212 is connected to the flow path switching mechanism 220.

  Among these components, the switching cover 216 is indirectly fixed to the case 218 of the faucet device, and the switching ring 210 is fixed to the switching cover 216. Accordingly, the switching cover 216 and the switching ring 210 are neither moved nor displaced. The coil spring 214 is mounted in a compressed state between the switching shaft member 212 and the switching cover 216. The coil spring 214 biases the operation button 204 pressed by an external force toward the original position. The coil spring 214 needs to move not only the operation button 204, the first switching member 206, the second switching member 208, and the switching shaft member 212 but also the flow path switching mechanism 220 as a unit. Therefore, the spring constant of the coil spring 214 is large and the initial setting spring load is also large.

  When the operation button 204 is pressed backward against the spring force of the coil spring 214, the first switching member 206, the second switching member 208, and the switching shaft member 212 are in contact with each other. Interlocks and moves backwards. When the pressing force on the operation button 204 is released, the operation button 204, the first switching member 206, the second switching member 208, and the switching shaft member 212 are interlocked with each other by the restoring force of the coil spring 214. And move forward.

  In the reciprocating motion along the direction X, the first switching member 206 is rotated around the central axis in the direction X by the cam action of the second switching member 208. Locking projections (not shown) of the first switching member 206 are sequentially locked in a plurality of locking grooves (not shown) of the switching ring 210. A plurality of locking grooves are formed at intervals in the circumferential direction of the switching ring 210. The plurality of locking grooves have different depths in the direction X. The switching operation of the flow path switching mechanism is performed by the locking protrusions of the first switching member 206 being locked in grooves having different depths in the switching ring 210. Thus, the operation button 204, the first switching member 206, the second switching member 208, the switching ring 210 and the coil spring 214 constitute a so-called thrust lock mechanism. An example of a faucet device having an operation button mechanism similar to the operation button mechanism 202 is disclosed in Japanese Patent No. 3454756.

  During the switching operation by such an operation button mechanism 202, the first switching member 206 is caused to collide with the second switching member 208 and the switching ring 210 by the force of the strong coil spring 214. The first switching member 206 is in contact with the second switching member 208 and the operation button 204. Therefore, the impact and vibration are transmitted to the user's finger through the operation button 204. Furthermore, a loud operating noise is also generated with the collision.

  Japanese Patent No. 4695019 discloses a position switching mechanism for a valve body in a flow path of a faucet device. In this publication, for the purpose of reducing the operating noise of the switching mechanism, it is proposed to increase the cam surface in the thrust lock mechanism. However, the increase in the cam surface leads to an increase in the size of cam parts and an increase in friction on the cam surface. As a result, a large operation load is required along with an increase in size of the product.

Japanese Patent No. 3454756 Japanese Patent No. 4695019

  The present invention has been made in view of the above-described present situation, and an operation button mechanism capable of effectively reducing impact, vibration, and operation sound during operation of the thrust lock mechanism with a simple configuration, and this An object is to provide a faucet device using an operation button mechanism.

The operation button mechanism of the faucet device according to the present invention is:
In the faucet device, an operation button mechanism for performing a switching operation of the switching mechanism in order to switch the flow path,
An operation button that can be operated in the direction X;
A first urging member for urging the operation button in the counter-operation direction;
A second urging member having a smaller urging force than the first urging member;
A first switching member and a second switching member capable of performing a cam action;
The first switching member is rotatable about an axis relative to the second switching member;
The second biasing member biases the second switching member so that the first switching member can be rotated by the cam action,
With the operation of the operation button against the urging force of the first urging member, the second urging member rotates the first switching member with respect to the second switching member, and the first position and the second position Configured to be able to switch to
In the first position, the switching mechanism selects one channel, and in the second position, the switching mechanism selects another channel.

Preferably, further comprising a switching shaft member,
The switching shaft member is connected to the operation button and the switching mechanism,
The first biasing member biases the operation button and the switching shaft member in the counter-operation direction,
The first switching member, the second switching member, and the switching shaft member are configured to move in the direction X when the operation button is operated.
The second urging member is at least one of the operation button, the first switching member and the second switching member, and the switching shaft member, the first switching member and the second switching member. Is intervened.

  Preferably, the operation button, the first switching member, the second switching member, the switching shaft member, the first biasing member, and the second biasing member are arranged coaxially.

Preferably, it further comprises a fixed switching ring,
The first switching member and the second switching member are configured to move in the direction X by the operation of the operation button,
Within the range of movement of the first switching member, a rotatable region where rotation of the first switching member relative to the second switching member is allowed and a non-rotatable region where rotation is restricted by the switching ring are formed. .

  Preferably, the second urging member includes one or more of a coil spring, a leaf spring, and an elastic member.

The faucet device according to the present invention is
A water guide section including a flow path A and a flow path B;
A switching mechanism for switching between the channel A and the channel B;
And an operation button mechanism for performing a switching operation of the switching mechanism,
The operation button mechanism includes the operation button mechanism described in any of the operation button mechanisms described above.

  According to the operation button mechanism of the present invention, it is possible to effectively reduce the impact, vibration, and operation sound when the thrust lock mechanism is operated. As a result, the durability of the operation button mechanism, that is, the durability of the faucet device can be improved.

FIG. 1 is a perspective view of a faucet device according to a first embodiment of the present invention. FIG. 2 is a side view of the faucet device of FIG. FIG. 3 is a perspective view before assembly showing the operation portion and the cover member. 4A is a plan view of the operation unit, FIG. 4B is a cross-sectional view taken along line BB in FIG. 4A, and FIG. 4C is a cross-sectional view of FIG. It is sectional drawing along CC line. Fig.5 (a) is a front view of the conical coil spring which shows an example of the elastic member with which the inside of an operation part is mounted | worn, FIG.5 (b) is the top view. FIG. 6 is a side view of the discharge unit. FIG. 7 is a plan view of the ejection unit. FIG. 8 is a cross-sectional view of the discharge portion. FIG. 9 is a perspective view of the discharge unit before assembly. FIG. 10 is a partially enlarged view of FIG. FIG. 11 is a cross-sectional view illustrating a part of the ejection unit. In FIG. 11, the operation unit is at the first position P1. FIG. 12 is a cross-sectional view illustrating a part of the ejection unit. In FIG. 12, the operation unit is at the second position P2. FIG. 13 is a cross-sectional view illustrating a part of the ejection unit. In FIG. 13, the operation unit is at the third position P3. FIG. 14A is a front view showing the second switching member, FIG. 14B is a plan view thereof, and FIG. 14C is a bottom view thereof. 15 (a) is a front view showing the switching ring, FIG. 15 (b) is a plan view thereof, FIG. 15 (c) is a bottom view thereof, and FIG. 15 (d) is a side view thereof. . 16 (a) is a front view showing the first switching member, FIG. 16 (b) is a plan view thereof, and FIG. 16 (c) is a side view thereof. FIG. 17 is a front view showing a state before assembly of the first switching member, the second switching member, and the switching ring that are responsible for the alternate operation in the operation button mechanism. It is a front view which shows the state after the assembly of the 1st switching member, 2nd switching member, and switching ring explaining the alternate operation | movement in an operation button mechanism, Fig.18 (a) shows the 1st position P1, FIG.18 (b) ) Shows the movement process from the first position P1 to the third position P3, FIG. 18C shows the third position P3, and FIG. 18D shows the movement process from the third position P3 to the second position P2. FIG. 18 (e) shows the second position P2. FIG. 19 is a cross-sectional view showing a part of a discharge part of a faucet device according to another embodiment of the present invention. FIG. 20 is a partial cross-sectional view showing an example of an operation button mechanism in a conventional water faucet device.

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

  FIG. 1 is a perspective view of a faucet device 2 according to an embodiment of the present invention, and FIG. 2 is a side view of the faucet device 2. The faucet device 2 is attached to a sink (not shown). In FIG.1 and FIG.2, description of the part which is not visually recognized, ie, the part in the inside of a sink, is abbreviate | omitted. In addition, as a setting place of the faucet device 2, a sink and a bathroom are illustrated in addition to a sink.

  Although not shown, the faucet device having the faucet device 2 has a hot water introduction pipe and a water introduction pipe. For example, the hot water introduction pipe is connected to a pipe extending from the water heater. For example, the water introduction pipe is connected to the water supply pipe without passing through the water heater.

  The faucet device 2 includes a main body portion 4, a lever handle 6, and a discharge portion 8. The faucet device 2 is a so-called single lever faucet. The temperature of the discharged water can be adjusted by turning the lever handle 6 left and right. The amount of water discharged can be adjusted by turning the lever handle 6 up and down. A valve mechanism that allows temperature adjustment and water discharge adjustment is incorporated in the main body 4.

  In the faucet device 2, the discharge part 8 is fixed to the main body part 4, but other forms are possible. For example, the shower 8 may be a detachable shower head with respect to the main body 4.

  Although not shown, heated hot water is introduced into the hot water introduction pipe. Heating is performed by a water heater. Unheated water is introduced into the water introduction pipe. The mixing ratio of hot water and water is adjusted by the valve mechanism. By this mixing ratio, temperature control of the water discharge is achieved. Hereinafter, heated hot water, unheated water, and a mixed liquid thereof are also simply referred to as “water”.

  The discharge unit 8 includes a water guide unit 10, a switching unit 12, an operation unit 14, a water shape adjustment unit 16, and a discharge port 18. In the present embodiment, the operation unit 14 is a push button. Hereinafter, the operation unit 14 is also referred to as an operation button.

  The discharge part 8 has two flow paths. From the viewpoint of clarifying the distinction between these two flow paths, the names of the flow paths A and B are used in the present application. In the faucet device 2, the channel A is a raw water channel, and the channel B is a purified water channel. However, the role of each flow path is not limited. For example, the channel A may be a purified water channel and the channel B may be a raw water channel. For example, warm water and cold water may be switched by two flow paths. Moreover, the discharge part 8 may have three or more flow paths.

  In the present application, the terms “water discharge Wa” and “water discharge Wb” are used from the viewpoint of clarifying the distinction of water discharge. The water discharge Wa is water from the flow path A. The discharged water Wb is water from the flow path B. In the faucet device 2, the discharged water Wa is raw water, and the discharged water Wb is purified water.

  The switching unit 12 includes a cover member 20 and a switching mechanism 100 (FIGS. 9 to 13). The cover member 20 covers at least a part of the switching mechanism 100. Details of the switching mechanism 100 will be described later.

  FIG. 3 is a perspective view of the operation unit 14 and the cover member 20. The operation unit 14 is a bottomed cylindrical member having a pressing surface 22 and a side surface 24. The pressing surface 22 is a flat surface. The pressing surface 22 is circular. The shape of the pressing surface 22 is not limited. The cover member 20 covers at least a part of the side surface 24. The cover member 20 is combined with a second cover member 21 (described later).

  As shown in FIG. 4, a pair of ribs 15 that are spaced apart from and parallel to each other are formed inside the operation unit 14. The tip of the rib 15 can abut on a switching shaft member 42 described later. A spring seat 17 is formed on the bottom surface of the operation unit 14, that is, on the inner surface of the pressing surface 22. The spring seat 17 is composed of a circular recess. A conical coil spring 19 as a second urging member can be seated on the spring seat 17.

  FIG. 5 shows the conical coil spring 19. As illustrated, the conical coil spring 19 is made of a plate material having a rectangular cross section instead of a strand having a circular cross section. By using the plate material, displacement in a direction perpendicular to the central axis of the spring is suppressed. This conical coil spring 19 has a smaller spring constant and initial set spring load than a first coil spring described later. The functions of the rib 15 and the conical coil spring 19 will be described later.

  The operation unit 14 functions as a switching button. When switching the flow path, the pressing surface 22 is pressed. Every time the operation unit 14 is pressed, switching between the flow path A and the flow path B is performed. As will be described later, the switching mechanism 100 has an operation button mechanism 34 (FIGS. 9 to 13) of an alternate operation method. The operation button mechanism 34 is a push button mechanism. By this operation button mechanism 34, the push button operation of the operation unit 14 is realized. Each time the pressing operation is performed, the operation button 14 moves to the first position P1 (FIG. 11) and the second position P2 (FIG. 12).

  The water shape adjusting unit 16 can change the shape of the discharged water. The water shape adjustment unit 16 has an adjustment ring 26. By rotating the water shape adjusting unit 16 with the adjustment ring 26, the water shape can be changed. By operating the adjusting ring 26, a shower water shape, a straight water shape, and an intermediate water shape can be selected. Instead of the ring 26, a lever, a knob or the like may be employed.

  As shown in FIG. 3, the cover member 20 has a front portion 30. The operation unit 14 is inserted in the front part 30. The operation unit 14 can move inside the front part 30. The front part 30 is cylindrical. The inner surface shape of the front portion 30 corresponds to the shape of the side surface 24. Since the gap between the side surface 24 and the front portion 30 is small, intrusion of water or the like is suppressed.

  FIG. 6 is a side view of the discharge unit 8. FIG. 7 is a top view of the discharge unit 8. FIG. 8 is a cross-sectional view of the discharge unit 8. FIG. 9 is a perspective view of the discharge unit 8 before assembly. In FIG. 9, the water shape adjustment unit 16 is not shown. FIG. 10 is a perspective view before assembly in which a part of FIG. 9 is enlarged.

  Here, the words “front” and “back” are used. “Front” and “rear” are directions along the direction X. “Backward” is a direction toward the far side in the direction X. Accordingly, in the above embodiment, the pressing force perpendicular to the pressing surface 22 is directed rearward. The front is the direction opposite to the rear.

  As shown in FIG. 9, the discharge unit 8 includes a cover member 20, a second cover member 21, an operation button mechanism 34, and a case 35.

  The operation button mechanism 34 includes an operation unit 14, a conical coil spring 19, a first switching member 36, a second switching member 38, a switching ring 40, a switching shaft member 42, a first coil spring 44 as a first urging member, and switching. A cover 46 and an O-ring 48 are provided. The switching shaft member 42 includes a push rod 50 and a button holding portion 52. The push rod 50 and the button holding part 52 are integrally formed. The switching cover 46 has a back side bottom portion 56 and a slit 58. The switching ring 40 is fixed to the front side of the switching cover 46. The switching shaft member 42 is guided by the slit 58 and moves in and out in a predetermined direction. This moving direction is also referred to as direction X in the present application. A push rod 50 is inserted through the first coil spring 44. The first coil spring 44 is located between the back side bottom portion 56 of the switching cover 46 and the base portion of the switching shaft member 42 and biases them in a direction away from each other. The first coil spring 44 is mounted coaxially with the switching shaft member 42 and the operation unit 14. The first coil spring 44 pushes the operation unit 14 forward via the switching shaft member 42 as a first urging member. The first coil spring 44 exhibits a spring force that resists the pressing operation of the operation unit 14.

  An engagement hole 14a is formed in the operation portion 14 (FIGS. 3 and 8). The engaging claw 52a of the button holding part 52 of the switching shaft member 42 is engaged with the engaging hole 14a (FIG. 8). Thereby, the operation part 14 and the switching shaft member 42 are connected. Further, as described above, the rib 15 of the operation unit 14 is in contact with the switching shaft member 42. Accordingly, the switching shaft member 42 is moved back and forth (reciprocated) in the direction X together with the operation unit 14 by the pressing operation of the operation unit 14. Another member may be interposed between the operation unit 14 and the switching shaft member 42. The switching shaft member 42 is connected to the first valve 101 of the switching mechanism 100 as will be described later. Accordingly, when the operation unit 14 is pressed against the spring force of the first coil spring 44, the flow path is switched by the switching mechanism 100. Further, the first switching member 36 rotates for each pressing operation of the operation button 14 and can be held at two different positions. The operation button mechanism 34 realizes an alternate operation described later.

  A thrust lock mechanism is used for the operation button mechanism 34. 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. However, the operation button mechanism 34 in the present embodiment has a configuration in which the impact force associated with the operation of the thrust lock mechanism is greatly reduced.

  In general, heart-shaped cam mechanisms, rotary cam mechanisms, ratchet cam mechanisms, and the like are known as so-called alternate operation type operation button mechanisms. Any of these mechanisms can be employed as the operation button mechanism 34. Any button mechanism that allows an alternate operation method may be employed.

  The alternate operation of the operation button mechanism 34 is as follows. When the operation unit 14 at the first position P1 is pressed, the operation unit 14 moves to the second position P2 via a third position P3 described later. Unless the pressing force is applied again, the second position P2 is maintained. Next, when the operation unit 14 at the second position P2 is pressed, the operation unit 14 returns to the first position P1 via the third position P3. Unless the pressing force is applied again, the first position P1 is maintained. For each pressing operation, the first position P1 and the second position P2 are switched via the third position P3. The first position P1, the second position P2, and the third position P3 are different in the position X.

  In the present embodiment, the first position P1 is also referred to as a protruding position. In this protruding position, the operation unit 14 is located on the near side (front side) with respect to the second position P2. In the present embodiment, the second position P2 is also referred to as a regression position. In this retreat position, the operation part 14 is located behind the first position P1. 1, FIG. 6, FIG. 7 and FIG. 8 show the operation unit 14 in the protruding position (front position). On the other hand, FIG. 2 shows the operation unit 14 in the retreat position (rear position). 11 to 13 are sectional views of the vicinity of the operation button mechanism 34 and the switching mechanism 100 of the discharge unit 8. FIG. 11 shows the operation button mechanism 34 with the operation unit 14 in the first position P1, FIG. 12 shows the operation button mechanism 34 with the operation unit 14 in the second position P2, and FIG. The operation button mechanism 34 in which the operation unit 14 is at the third position P3 is shown.

  14 to 17 show members that constitute a part of the operation button mechanism 34. FIG. 14 shows the second switching member 38. The second switching member 38 has a cylindrical main body 39 and a pressing protrusion 39a formed on the outer periphery of the main body 39 on the rear end (lower end in the drawing) side. A plurality of pressing protrusions 39a are formed at equal intervals and protrude in the radial direction. In the present embodiment, six pressing protrusions 39a are formed, but the number is not limited. The shape of the main body 39 is not limited to a cylindrical shape. At the rear end (lower end in the drawing) of the pressing protrusion 39a, a slope 39b is formed that is inclined from the central axis direction of the second switching member 38 in the circumferential direction of the cross section. The inclined surface 39b can abut on an inclined surface 37c of a locking projection 37b of the first switching member 36 described later.

  FIG. 15 shows the switching ring 40. The switching ring 40 has a cylindrical main body 41 and a deep groove 41a and a shallow groove 41b formed on the rear end (lower end in the figure) side of the main body 41. The same number of deep grooves 41 a and shallow grooves 41 b are alternately formed at equal intervals in the circumferential direction of the main body 41. In this embodiment, three each is formed. The deep groove 41a extends linearly forward in the direction X. The shallow groove 41b has an inclined surface 41d inclined from the direction X in the circumferential direction of the cross section. The second switching member 38 is inserted inside the main body 41. Six guide grooves 41 c for guiding the axial movement of the pressing protrusion 39 a of the second switching member 38 are formed on the inner peripheral surface of the main body 41. The number of the deep grooves 41a and the shallow grooves 41b is not limited to three, but is ½ of the pressing protrusions 39a of the second switching member 38.

  FIG. 16 shows the first switching member 36. The first switching member 36 includes a cylindrical main body 37, a convex portion 37 a that is coaxially projected at the front end (upper end in the drawing) of the main body 37, and an engagement formed on the outer periphery near the upper end of the main body 37. A stop projection 37b is provided. A convex portion 43 at the front end of the switching shaft member 42 is inserted inside the cylindrical main body 37. A plurality of locking protrusions 37b are formed at equal intervals and protrude in the radial direction. In the present embodiment, three locking projections 37b are formed, but the number is not limited. The number of the locking projections 37b is the same as the number of the deep grooves 41a and the number of the shallow grooves 41b of the switching ring 40. At the front end (upper end in the figure) of the locking projection 37b, a slope 37c is formed that is inclined from the central axis direction of the first switching member 36 in the circumferential direction of the cross section. The inclined surface 37c can come into contact with the inclined surface 39b of the pressing protrusion 39a of the second switching member 38 described above. These inclined surfaces 37c and 39b have a cam action in an alternate operation method to be described later. That is, the first switching member 36 and the second switching member 38 constitute a cam mechanism. The locking protrusion 37b can be inserted into the deep groove 41a and the shallow groove 41b. In the alternate operation, the locking protrusions 37b are alternately inserted into the deep grooves 41a and the shallow grooves 41b.

  FIG. 17 shows a state before the second switching member 38, the switching ring 40, and the first switching member 36 are assembled. The second switching member 38 is inserted inside the main body 41 of the switching ring 40. At this time, the pressing protrusion 39 a of the second switching member 38 is inserted into the guide groove 41 c of the switching ring 40. The first switching member 36 is inserted into the inside of the main body 41 of the switching ring 40 from below. At this time, the locking protrusion 37 b of the first switching member 36 is inserted into the deep groove 41 a or the shallow groove 41 b of the switching ring 40. At the same time, the convex portion 37 a of the first switching member 36 is inserted inside the main body 39 of the second switching member 38.

  The alternate operation by the operation button mechanism 34 will be described with reference to FIGS. 11 to 13 and FIG. FIG. 18 shows a state (assembly) after the second switching member 38, the switching ring 40, and the first switching member 36 are assembled. FIG. 18 shows the positional relationship between the second switching member 38 and the first switching member 36 with respect to the switching ring 40 accompanying the alternate operation. As described above, the switching ring 40 does not move because it is fixed to the switching cover 46. 18A shows the first position P1 of the assembly, FIG. 18B shows the movement process from the first position P1 to the third position P3, FIG. 18C shows the third position P3, d) shows the movement process from the third position P3 to the second position P2, and (e) shows the second position P2.

  In the first position P1 shown in FIGS. 11 and 18A, the operation unit 14 is located on the near side (front side) with respect to the second position P2. As shown in FIG. 11, the operation portion 14 is pushed forward in the direction X through the switching shaft member 42 and the rib 15 by the spring force (restoring force) of the first coil spring 44. The switching shaft member 42 is positioned by a front connecting portion j1 of a ball holding body 101c, which will be described later, abutting against the inner surface of the front end of the case 35 (FIG. 11). As described above, the operation unit 14 and the switching shaft member 42 are connected. The positional relationship in the direction X between the operation unit 14 and the switching shaft member 42 hardly changes. At the first position P1, the locking protrusion 37b of the first switching member 36 is not affected by the pressing protrusion 39a and is in a free state (FIG. 18A). In the present embodiment, in the state where the rib 15 is in contact with the switching shaft member 42, there is a slight gap along the direction X between the front end of the second switching member 38 and the inner surface of the pressing surface 22 of the operation unit 14. It is configured to occur. In the present embodiment, this gap is about 4 mm. Of course, the dimensions are not limited. Therefore, the spring force of the first coil spring 44 does not act on the first switching member 36 and the second switching member 38. The conical coil spring 19 as the second urging member described above is mounted in a compressed state so as to fill this gap (FIG. 11). The conical coil spring 19 always presses the first switching member 36 against the switching shaft member 42 via the second switching member 38. The second switching member 38 and the first switching member 36 are always in contact with each other. The conical coil spring 19 is mounted coaxially with the operation unit 14, the second switching member 38 and the first switching member 36. Accordingly, the operating force applied to the operation unit 14 is transmitted to the second switching member 38 and the first switching member 36 efficiently and smoothly.

  When the operation portion 14 at the first position P1 is pressed toward the rear in the direction X, the rib 15 of the operation portion 14 moves the switching shaft member 42 in the direction X against the spring force of the first coil spring 44. Push backwards. Even during this operation, as described above, the conical coil spring 19 pushes the second switching member 38 and the first switching member 36 backward in the direction X. The pressing protrusion 39a of the second switching member 38 pushes the locking protrusion 37b of the first switching member 36 rearward in the direction X (FIG. 18B). The inclined surface 39b of the pressing protrusion 39a presses the inclined surface 37c of the locking protrusion 37b. As a result, the pressing protrusion 39a attempts to rotate the first switching member 36. This is the operation of the cam mechanism. When the locking projection 37b is in the deep groove 41a, the rotation of the first switching member 36 around the central axis is restricted by the inner wall surface of the deep groove 41a. The first position P1 is a non-rotatable region of the first switching member 36. The position where the locking projection 37b is pushed out from the deep groove 41a is the third position P3 (FIGS. 13 and 18C). In the third position P3, the rotation of the first switching member 36 is not restricted. The third position P3 is a rotatable region of the first switching member 36. Since the inclined surface 39b of the pressing protrusion 39a presses the inclined surface 37c of the locking protrusion 37b, the first switching member 36 is rotated around the central axis by the reaction force forward in the direction X from the switching shaft member 42 (FIG. 18). (C)). This rotational force is due to the spring force of the conical coil spring 19. As a result, the locking projection 37b rotates and moves along the slope 41d of the shallow groove 41b (FIG. 18 (d)). This can also be said to be an effect of the cam mechanism. Finally, the locking projection 37b is locked to the front end (upper end in the drawing) of the shallow groove 41b, and the operation portion 14, the first switching member 36, etc. reach the second position P2 (FIGS. 12, 18). e)). When the locking projection 37b is in the shallow groove 41b, the rotation of the first switching member 36 around the central axis is restricted by the inner wall surface of the shallow groove 41b. The second position P2 is a non-rotatable region of the first switching member 36.

  As described above, the conical coil spring 19 has a smaller initial spring load and spring constant than the first coil spring 44. Since it is only for rotating the 1st switching member 36 via a cam effect | action, a big force is unnecessary. The initial set spring load is a load when the springs 19 and 44 are bent at the first position P1.

  The initial setting spring load of the conical coil spring 19 is preferably set in the range of 0.5N to 1.0N. This is because if the load is less than 0.5 N, the cam may malfunction, and if it exceeds 1.0 N, the switching noise, impact and vibration suppression effects may be reduced. From this point of view, the initial setting spring load is more preferably 0.6 N or more and 0.9 N or less. Moreover, it is especially preferable that this load is 0.7N or more and 0.8N or less.

  The ratio of the initial setting spring load of the conical coil spring 19 to the initial setting spring load of the first coil spring 44 is preferably 1/20 or more and 1/10 or less. This is because if the ratio is less than 1/20, the internal unit may malfunction, and if it exceeds 1/10, the switching noise, impact, and vibration suppression effects may be reduced. From this point of view, the ratio of the initial setting spring load is more preferably 1/18 or more and 1/15 or less. Moreover, it is particularly preferable that this ratio is 1/17 or more and 1/16 or less.

  The spring constant of the conical coil spring 19 is preferably set in the range of 0.15 N / mm to 0.6 N / mm. If this spring constant is less than 0.15 N / mm, the cam may malfunction, and if it exceeds 0.6 N / mm, the switching noise, impact and vibration suppression effects may be reduced. is there. From this point of view, the spring constant is more preferably 0.2 N / mm or more and 0.8 N / mm or less. The spring constant is particularly preferably 0.3 N / mm or more and 0.4 N / mm or less.

  The ratio of the spring constant of the conical coil spring 19 to the spring constant of the first coil spring 44 is preferably 0.19 or more and 0.76 or less. If this ratio is less than 0.19, the switching noise, impact and vibration suppression effects may be reduced, and if it exceeds 0.76, the internal unit may malfunction. From this point of view, the ratio of the spring constants is more preferably 0.3 or more and 0.6 or less. Further, this ratio is particularly preferably 0.4 or more and 0.5 or less.

  As described above, the operation unit 14, the conical coil spring 19, the switching shaft member 42, the first switching member 36, and the second switching member 38 try to reciprocate in the direction X by the pressing operation of the operation unit 14. However, when the first switching member 36 and the second switching member 38 are inserted inside the switching ring 40, the first switching member 36 is rotated around the central axis by the cam action. The locking protrusions 37b are alternately locked to the deep grooves 41a and the shallow grooves 37b. Thereby, the operation unit 14, the first switching member 36, and the like are changed in position to the first position P1 and the second position P2.

  Switching from the second position P2 to the first position P1 is also possible by pressing the operation unit 14 and passing through the third position P3. At the first position P1 and the second position P2, the positions of the operation unit 14, the first switching member 36, and the like are stably maintained. In the third position P3, the operation unit 14, the first switching member 36, and the like cannot be held at that position unless there is a holding action by an external force. Each time the position is switched, the first switching member 36 collides with the pressing protrusion 39 a of the second switching member 38. The first switching member 36 also collides with the deep groove 41 a and the shallow groove 41 b of the switching ring 40. The shock and vibration at this time are also transmitted to the second switching member 38. However, all the collisions are caused by the spring force of the conical coil spring 19 having a small spring constant. Therefore, the impact, vibration and operating noise are small. Further, the impact and vibration are not transmitted directly to the operation unit 14 but are transmitted via the conical coil spring 19. For this reason, a large impact or vibration is not applied to the finger of the user who is pressing the operation unit 14. As described above, the operation button mechanism 34 (thrust lock mechanism) greatly reduces the impact, vibration, and operation sound associated with the alternate operation.

  In the present embodiment, the conical coil spring 19 is used as the second urging member, but the configuration is not limited thereto. A cylindrical coil spring can also be employed. However, a conical coil spring is preferable from the viewpoint of suppressing the lateral displacement of the second urging member. A leaf spring may be employed instead of the coil spring. For example, a leaf spring may be attached to the bottom surface of the operation unit 14 in a cantilever shape. And you may make it the front end of the main body 39 of the 2nd switching member 38 contact | abut to the free end vicinity of this leaf | plate spring. From the viewpoint of space saving for mounting the second urging member, a leaf spring is preferable. Examples of spring materials such as coil springs and leaf springs include polyoxymethylene (POM), resin such as silicone, ethylene propylene diene rubber (EPDM), nitrile rubber (NBR), rubber such as fluorine rubber, and metals such as stainless steel. It can be adopted. From the viewpoint of durability, POM and stainless steel are preferable. Among these, stainless steel is preferable from the viewpoint of space saving.

  It is also possible to employ a flexible elastic material such as rubber as the second urging member. The second urging member made of a flexible elastic material is a member that does not exhibit a shape as a spring and can exhibit an elastic restoring force peculiar to the material. This is called an elastic member. As the elastic member, for example, a flexible elastic material such as a columnar shape may be attached to the bottom surface of the operation unit 14. And you may make it the front end of the main body 39 of the 2nd switching member 38 contact | abut to the front-end surface of this cylindrical elastic material. As the rubber, EPDM, NBR, fluorine rubber or the like can be used. As the resin, silicone, elastomer, or the like can be used. These second biasing members only bias the second switching member 38 and the first switching member 36 slightly in the rearward direction X. Therefore, the spring constant and the elastic coefficient may be small as described above. The user can replace the second biasing member having a different spring constant and elastic modulus. The user can change the bending (initial setting spring load) at the first position P1 of the second urging member. Thus, it is possible to adjust the impact, vibration, and operation sound during operation.

  Below, the flow path of water is described. As shown in FIG. 9, the water guide section 10 includes an outer cover 60 and an inner cylinder 62. The inner cylinder 62 has a water inlet 64 and a joint portion 66. The joint portion 66 is joined to the case 35 in a watertight manner.

  As shown in FIG. 8, the water guide unit 10 includes a water purification unit 68. The water purification part 68 of this embodiment is a replaceable water purification cartridge. The water purification cartridge 68 includes a water purification flow path 70B, a water quality purification unit 72, and caps 74 disposed at the upstream and downstream ends. The water purification unit 72 includes a water purification material 72a, an outer filtration layer 72b, and an inner filtration layer 72c. The water purification material 72a has activated carbon as a main component. For example, a nonwoven fabric is used for the outer filtration layer 72b and the inner filtration layer 72c. A ceramic having a sterilizing action may be employed for the outer filtration layer 72b and / or the inner filtration layer 72c. An ion exchanger may be employed for the outer filtration layer 72b and / or the inner filtration layer 72c. The outer filtration layer 72b may be a plurality of layers. The inner filtration layer 72c may be a plurality of layers. The purified water flow path 70B is an example of the flow path B. In FIG. 9, the water purification cartridge 68 is not shown.

  A raw water channel 76 </ b> A is formed outside the water purification cartridge 68. The raw water flow path 76A is an example of the flow path A.

  When in the raw water discharge state, the raw water that has passed through the raw water flow path 76A is discharged from the discharge port 18 via the switching mechanism. On the other hand, when in the purified water discharge state, the purified water that has passed through the purified water flow path 70B passes through the filter 78, reaches the switching mechanism, and is discharged from the discharge port 18 via this switching mechanism.

  When in the purified water discharge state, the raw water introduced from the water inlet 64 passes through the water purification unit 72 and reaches the purified water flow path 70B to become purified water. More specifically, the raw water passes through the outer filtration layer 72b, the water purification material 72a, and the inner filtration layer 72c and reaches the purified water flow path 70B.

  In the purified water discharge state, foreign matter or the like adheres to the outer filtration layer 72b. However, the foreign matter or the like can be discharged together with the raw water in the raw water discharge state. Therefore, clogging of the water purification cartridge 68 is suppressed, and the water purification performance of the water purification cartridge 68 is maintained for a long time.

  As described above with reference to FIG. 11 to FIG. 13 and FIG. 18, the operation button mechanism 34 causes the operation button 14 to be changed between the first position P1 (FIG. 11) and the second position P2 (FIG. 12) for each pressing operation. Alternately. The third position P3 (FIG. 13) is behind the second position P2. The third position P3 is a position where the operation button 14 is most depressed, and can occur only during the operation. In the mutual transition between the first position P1 and the second position P2, the third position P3 is routed. However, the positions held by the operation button mechanism 34 are only the first position P1 and the second position P2.

  The discharge unit 8 includes a switching mechanism 100 that can switch between the water discharge Wa from the flow path A and the water discharge Wb from the flow path B. The switching of water discharge by the switching mechanism 100 is alternative. The switching mechanism 100 includes the operation button 14 described above, the first valve 101, the second valve 102, and the third valve 103. The water discharge is switched by opening and closing the three valves. Two or less valves may be provided. From the viewpoint of water discharge diversity, the number of valves is preferably 3 or more. Considering miniaturization and cost, the number of valves is preferably 2 or 3, and most preferably 3.

  In the present embodiment, the first valve 101 includes a valve seat 101a and a first valve body 101b (see FIG. 10). The first valve 101 is a ball valve. The first valve body 101b is a ball. The valve seat 101a is an annular member. The valve seat 101a has a through hole h1 (see FIG. 11). The valve seat 101a is made of an elastic material. The valve seat 101 a is mounted in the through hole 108 of the valve seat mounting portion 106. The ball 101b is held by a ball holder 101c. The ball holder 101c is opened downward. An elastic body 101d is disposed between the upper part of the ball holder 101c and the first valve body 101b. The elastic body 101d is a coil spring. The first valve body 101b is always urged toward the valve seat 101a by the elastic body 101d. Inside the case 35, a space that allows the movement of the ball holder 101c in the direction X is secured.

  A connection portion 50j is provided behind the push rod 50. The connection portion 50j is connected to the front connection portion j1 (see FIGS. 8 and 10) of the ball holder 101c. Therefore, the ball holder 101 c moves in the direction X in conjunction with the push rod 50. In other words, the ball holder 101 c moves in the direction X in conjunction with the operation button 14. As the ball holder 101c moves, the first valve body 101b (ball) also moves in the direction X.

  When the operation button 14 is in the second position P2, the center of the ball 101b is located on the central axis of the through hole h1 of the valve seat 101a. Therefore, the ball 101b moves in the direction Y (FIG. 12) by the urging force and gravity on the elastic body 101d, and fits in the through hole h1 (see FIG. 12). The inner diameter of the through hole h1 is smaller than the diameter of the ball 101b. By this fitting, the through hole h1 is blocked by the ball 101b, and the first valve 101 is closed. On the other hand, when the operation button 14 is at the first position P1, the center of the ball 101b is displaced from the central axis of the through hole h1. For this reason, the ball 101b cannot fit into the through hole h1. Therefore, the through hole h1 is not blocked. Thus, when the operation button 14 is in the first position P1, the first valve 101 is open (see FIG. 11). The direction Y is perpendicular to the direction X. A configuration in which the ball 101b closes the through hole h1 only by gravity without using the elastic body 101d may be employed.

  The case 35 has a second valve body valve hole h2 and a third valve body valve hole h3. Inside the case 35, a shaft member 110 described later moves along the center line Z1. As the shaft member 110 moves, the second valve 102 opens and closes. At the same time, the third valve 103 is opened and closed by the movement of the shaft member 110. When the second valve 102 is closed, the third valve 103 is open.

  When the operation button 14 is in the third position P3, the first valve 101 is open, the second valve 102 is also open, and the third valve 103 is closed. The third valve 103 is closed regardless of the position of the operation button 14 from the second position P2 to the third position P3. Therefore, an effect (also referred to as effect A) in which wasteful discharge of purified water (water discharge Wb) is prevented can occur. In a normal pressing operation, the time during which the operation button 14 is at the third position P3 is a short time. However, considering that the third position P3 is generated every time the operation button 14 is pressed, the effect A is significant. Moreover, even if the operation button 14 exists in any position from the 2nd position P2 to the 3rd position P3, since the 3rd valve | bulb 103 is closed, mixing with purified water and raw | natural water is suppressed.

  The switching mechanism 100 has a shaft member 110. As shown in FIG. 10, the shaft member 110 includes a second valve body mounting portion 110a, a slope portion 110b, a small diameter portion 110c, a third valve body mounting portion 110d, a rear end portion 110e, and a connection portion 110j.

  The shaft member 110 is disposed coaxially with the second switching member 38. The shaft member 110 is arranged coaxially with the push rod 50. The connecting portion 110j is connected to the rear connecting portion j2 (see FIGS. 8 and 10) of the ball holder 101c. Therefore, the shaft member 110 moves in the direction X in conjunction with the ball holder 101c. The shaft member 110 can move in the direction X in conjunction with the operation button 14.

  The switching mechanism 100 has a second valve body 112. As shown in FIG. 10, in the present embodiment, the second valve body 112 is an O-ring. The second valve body 112 is fitted into the second valve body mounting portion 110a. The second valve body mounting portion 110a forms a circumferential groove, and the second valve body 112 is fitted into the circumferential groove.

  The switching mechanism 100 has a third valve body 113. As shown in FIG. 10, in the present embodiment, the third valve body 113 is a U-packing. The third valve body 113 is fitted into the third valve body mounting portion 110d. The third valve body mounting portion 110d forms a circumferential groove, and the third valve body 113 is fitted into the circumferential groove.

  As shown in FIG. 11, the second valve body valve hole h <b> 2 has a contact surface h <b> 21 that can contact the second valve body 112. This contact surface h21 is a slope. The contact surface h21 is a conical concave surface. The rear end portion 110e of the shaft member 110 cannot pass through the second valve element valve hole h2. Therefore, this shaft member 110 has an effect of preventing the shaft member 110 from moving forward beyond a predetermined position. Each valve 101, 102, and 103 opens and closes in conjunction with the shaft member 110. The retaining effect contributes to stable operation of each valve.

  As shown in FIG. 11, the case 35 has a third valve body valve hole h3. The third valve body valve hole h3 has a contact surface h31 that can contact the third valve body 113. The third valve element valve hole h3 is a through hole having a circular cross section and a constant inner diameter. The third valve body valve hole h <b> 3 is coaxial with the shaft member 110.

  As shown in FIG. 11, when the operation button 14 is in the first position P1 (projecting position), the second valve body 112 comes into contact with the contact surface h21. The second valve 102 is closed by this contact. On the other hand, when the operation button 14 is at the first position P1, the third valve body 113 does not contact the contact surface h31, and water can flow through the third valve body valve hole h3. That is, when the operation button 14 is in the first position P1, the third valve 103 is open.

  As shown in FIG. 12, when the operation button 14 is in the second position P2 (retreat position), the third valve body 113 contacts the contact surface h31. The third valve 103 is closed by this contact. On the other hand, when the operation button 14 is in the second position P2, the second valve body 112 does not contact the contact surface h21, and water can flow through the second valve body valve hole h2. That is, when the operation button 14 is in the second position P2, the second valve 102 is open.

  In the present embodiment, the plurality of valves are of different types. The first valve 101 is a ball valve. The second valve 102 is a combination of a slope that is a conical concave surface and an annular packing (O-ring) that is attached to the conical convex surface. The third valve 103 is a combination of the inner surface of the through hole and a packing (U packing) that can be reduced in diameter so as to contact the inner surface of the through hole.

  In the present embodiment, the first valve 101 is located behind the operation button 14. The second valve 102 is located behind the first valve 101. This tandem arrangement eliminates the need for a mechanism for changing the direction of the operating force. In addition, the operating force is transmitted smoothly. Therefore, a highly reliable switching mechanism 100 is realized. Moreover, the switching unit 12 can be reduced in size (slimmed) by this vertical arrangement. Therefore, the design freedom of the switching unit 12 is increased. The faucet device 2 is excellent in functionality and design.

  The third valve 103 is located behind the first valve 101. The third valve 103 is located in front of the second valve 102. The third valve 103 is located between the first valve 101 and the second valve 102. This tandem arrangement eliminates the need for a mechanism for changing the direction of the operating force. In addition, the operating force is transmitted smoothly. Further, the valves can be stably linked with each other. Therefore, a highly reliable switching mechanism 100 is realized. Moreover, the switching unit 12 can be reduced in size (slimmed) by this vertical arrangement.

  In the present embodiment, the first valve body 101 b is located behind the operation button 14. The second valve body 112 is located behind the first valve body 101b. This tandem arrangement eliminates the need for a mechanism for changing the direction of the operating force. In addition, the operating force is transmitted smoothly. Further, the valve bodies can be linked stably. Therefore, a highly reliable switching mechanism 100 is realized. Moreover, the switching unit 12 can be reduced in size (slimmed) by this vertical arrangement.

  The third valve body 113 is located behind the first valve body 101b. The third valve body 113 is located in front of the second valve body 112. The third valve body 113 is located between the first valve body 101b and the second valve body 112. This tandem arrangement eliminates the need for a mechanism for changing the direction of the operating force. In addition, the operating force is transmitted smoothly. Further, the valve bodies can be linked stably. Therefore, a highly reliable switching mechanism 100 is realized. Moreover, the switching unit 12 can be reduced in size (slimmed) by this vertical arrangement.

  In the discharge unit 8, the operation unit 14, the push rod 50, the first valve body 101b, and the shaft member 110 are arranged in series. This series direction is parallel to the direction X. The second valve body 112 and the third valve body 113 are attached to the shaft member 110. Therefore, the transmission of the pressing force is smooth, and the interlocking of these members is reliably achieved.

  As described above, the operation button mechanism 34 has the push rod 50. The push rod 50 is located behind the operation button 14. The first valve body 101 b is located behind the push rod 50. The shaft member 110 is located behind the first valve body 101b. Therefore, the pressing force of the operation button 14 is smoothly transmitted to the first valve body 101 b and the shaft member 110 through the push rod 50. A mechanism for changing the direction of the operating force is unnecessary.

  In the switching mechanism 100, the first valve 101 is located behind the operation button 14. A third valve 103 is located behind the first valve 101. The second valve 102 is located behind the third valve 103. By this tandem arrangement, the discharge unit 8 can be reduced in size and slim. Due to this tandem arrangement, the operating force is smoothly transmitted to each valve. The opening / closing operation of each valve is stable.

  A center line Z1 of the shaft member 110 is parallel to the direction X. The center line of the push rod 50 is parallel to the direction X. Further, the push rod 50 is located behind the operation button 14, and the shaft member 110 is located behind the push rod 50. Therefore, the pressing force applied in the direction X can be efficiently transmitted to each valve. Further, a mechanism for changing the direction of the operating force may be unnecessary.

  A center line Z <b> 1 of the shaft member 110 coincides with the center line of the push rod 50. Further, the center line Z <b> 1 of the shaft member 110 coincides with the center line of the operation unit 14. The operation unit 14 and the push rod 50 are coaxial. Furthermore, the operation part 14, the conical coil spring 19, the first coil spring 44, and the shaft member 110 are coaxial. Therefore, the operation force applied to the operation unit 14 is transmitted to the push rod 50 and the shaft member 110 efficiently and smoothly.

  The push rod 50, the first coil spring 44, and the shaft member 110 are arranged coaxially. The shaft member 110 and the second valve body 112 are coaxial. Further, the shaft member 110 and the third valve body 113 are coaxial. Except for the state where the first valve 101 is closed, the first valve body 101b (ball) is also arranged coaxially with the shaft member 110 and the like. Therefore, the operation force can be transmitted directly and smoothly. In addition, the switching mechanism 100 with a simple mechanism and high reliability is realized.

  As described above, the open / close state of each valve differs depending on the position of the operation button 14. In the present application, an open / close state V1 and an open / close state V2 are defined as the open / close state.

  In the present application, a state where the first valve 101 is open and the second valve 102 is closed is referred to as an open / close state V1. FIG. 11 shows the open / close state V1. In the open / closed state V <b> 1, raw water (water discharge Wa) is discharged from the discharge port 18. Thus, when the operation button 14 is in the first position P1, the switching mechanism 100 is in the open / closed state V1, and the raw water is discharged from the discharge port 18 in the open / closed state V1.

  In FIG. 11, what is indicated by an alternate long and short dash line is a flow path of the raw water (water discharge Wa). The raw water from the raw water flow path 76A described above passes through the first valve 101 (through hole h1) and reaches the discharge port 18. The flow path from the raw water flow path 76A through the first valve 101 to the discharge port 18 is an example of the flow path A in the present application.

  As shown in FIG. 11, the channel A has a branch channel A <b> 1 that passes through the third valve 103. The water that has passed through the branch channel A <b> 1 merges with the water that has passed through the first valve 101 and is discharged from the discharge port 18. In the present embodiment, the branch channel A1 is a raw water channel.

  On the other hand, in this application, the state in which the first valve 101 is closed and the second valve 102 is open is referred to as an open / close state V2. FIG. 12 shows the open / close state V2. In this open / closed state V <b> 2, purified water (water discharge Wb) is discharged from the discharge port 18. Thus, when the operation button 14 is in the second position P2, the switching mechanism 100 is in the open / close state V2, and in this open / close state V2, clean water is discharged from the discharge port 18.

  In FIG. 12, a thin solid line arrow indicates a flow path of purified water (water discharge Wb). The purified water from the purified water flow path 70B described above passes through the second valve 102 (second valve body valve hole h2) and reaches the discharge port 18. The flow path from the purified water flow path 70B through the second valve 102 to the discharge port 18 is an example of the flow path B in the present application.

  The discharge unit 8 has a common flow path C in which the flow path A and the flow path B are common. The common flow path C is indicated by reference numeral 120C in FIG. The common flow path C is located on the downstream side of the switching mechanism 100. The common flow path C contributes to the downsizing of the discharge unit 8.

  As described above, when the third valve 103 is opened, the branch flow path A1 branched from the flow path A is formed. In the present application, the state where the first valve 101 is open, the second valve 102 is closed, and the third valve 103 is open is also referred to as an open / close state V10. When the operation button 14 is in the first position P1, the switching mechanism 100 is in the open / close state V10. In the open / close state V10, raw water (water discharge Wa) is discharged from the discharge port 18. The open / close state V10 is an example of an open / close state V1.

  In the present application, the state in which the first valve 101 is closed, the second valve 102 is open, and the third valve 103 is closed is also referred to as an open / close state V20. When the operation button 14 is in the second position P2, the switching mechanism 100 is in the open / close state V20. In this open / closed state V20, purified water (water discharge Wb) is discharged from the discharge port 18. The open / close state V20 is an example of an open / close state V2.

  From the above, the specification of switching by the switching mechanism 100 is as follows.

[First position P1: See FIG. 11]
The specifications when the operation button 14 is at the first position P1 are the following (a1) to (i1).
(A1) Channel A is selected.
(B1) Raw water (water discharge Wa) is discharged.
(C1) The switching mechanism 100 is in the open / close state V1.
(D1) The switching mechanism 100 is in the open / close state V10.
(E1) The first valve 101 is open.
(F1) The second valve 102 is closed.
(G1) The third valve 103 is open.
(H1) The operation button 14 is in the protruding position.
(I1) A branch channel A1 is formed.

[Second position P2: See FIG. 12]
Specifications when the operation button 14 is at the second position P2 are the following (a2) to (h2).
(A2) Channel B is selected.
(B2) Purified water (water discharge Wb) is discharged.
(C2) The switching mechanism 100 is in the open / close state V2.
(D2) The switching mechanism 100 is in the open / close state V20.
(E2) The first valve 101 is closed.
(F2) The second valve 102 is open.
(G2) The third valve 103 is closed.
(H2) The operation button 14 is in the retreat position.

  In the present embodiment, the first valve body 101b (ball) and the second valve body 112 (O-ring) are located on a single straight line L1 parallel to the direction X. That is, the single straight line L1 crosses the first valve body 101b and the second valve body 112. Here, “crossing the valve body” includes a case of passing through a space inside the valve body (such as a cavity inside the O-ring). The single straight line L1 can be arbitrarily selected. In FIG. 12, the center line Z1 of the shaft member 110 is selected as a single straight line L1. However, the straight line L1 is not limited as long as it is parallel to the direction X. The single straight line L1 may be the center line Z1 or a line other than the center line Z1. From the viewpoint of the transmission efficiency of the operating force, the single straight line L1 is preferably the center line Z1.

  As described above, in the present embodiment, the second valve body 112 is attached to the shaft member 110. And the center line Z1 (refer FIG. 12) of the shaft member 110 has passed the 1st valve body 101b (ball | bowl) in all the movable positions, and the operation part 14 (button) in all the movable positions. That is, the center line Z1 passes through the ball 101b and the operation button 14 at any position in the movable range. “Passing” includes not only the case of crossing but also the case of passing through an inner space (such as the inner side of an annular body).

As described above, in the present embodiment, the second valve body 112 and the third valve body 113 are mounted on the common shaft member 110. In the present embodiment, the second valve 102 is a shaft valve, and the third valve 103 is a shaft valve. A shaft valve is a valve that opens and closes by movement of a shaft member. A preferred shaft valve satisfies the following requirements (1) to (4).
(1) The valve body is attached to the shaft member.
(2) This shaft member is inserted through the hole.
(3) The movement of the shaft member causes the valve body and the inner surface of the hole to be separated from each other.
(4) Opening and closing of the valve is achieved by this separation / connection.

  In the faucet device 2, since the first valve body 101b and the second valve body 112 are located on the single straight line L1, the switching unit 12 can be reduced in size. Further, in the faucet device 2, the center line Z1 of the shaft member 110 intersects the first valve body 101b at every position and the operation unit 14 at every position. By this arrangement, the vicinity of the operation unit 14 and the switching unit 12 can be further reduced in size.

  In the faucet device 2, the operation unit 14, the first valve body 101b, and the second valve body 112 are located on a single straight line L1. The single straight line L1 is parallel to the moving direction of the operation unit 14. That is, this single straight line L1 is parallel to the pressing direction. Therefore, the operation force applied to the operation unit 14 is smoothly transmitted to the first valve body 101b and the second valve body 112. The operation unit 14 and the first valve body 101b are smoothly linked, and the operation unit 14 and the second valve body 112 are also smoothly linked. These interlocking mechanisms do not include a mechanism for changing the direction of the operating force. Therefore, these linkages can be achieved with a simple mechanism. By simplifying the mechanism, high durability is achieved, and operability and reliability are increased.

  Further, the third valve body 113 is also located on the single straight line L1. Therefore, the operation force applied to the operation unit 14 is smoothly transmitted to the third valve body 113. Therefore, in the switching mechanism 100 having three valves, the simplification of the mechanism is achieved, and the durability, operability, and reliability are excellent.

  The first coil spring 44 is located on the single straight line L1. That is, the single straight line L1 passes through the first coil spring 44 or the inside thereof. Further, the first coil spring 44 is coaxial with the axis Z1. Further, the expansion / contraction direction of the first coil spring 44 coincides with the direction X. Therefore, the operating force is efficiently transmitted to the first coil spring 44 and transmission loss is small.

  The second valve body 112 and the third valve body 113 are disposed on the common shaft member 110. Therefore, two valves can be formed compactly. Further, since the common shaft member 110 is used, the movement of the second valve body 112 and the movement of the third valve body 113 are reliable. Thus, the opening / closing of the second valve 102 and the opening / closing of the third valve 103 are reliable. For this reason, the highly reliable switching mechanism 100 can be realized. Further, by mounting the two valve bodies on the common shaft member 110, the number of parts is reduced, the assembly efficiency is increased, and the productivity is improved.

  The ball holder 101c moves the first valve body 101b. Therefore, the ball holder 101c is a first valve body driving member. The shaft member 110 moves the second valve body 112. Therefore, the shaft member 110 is a second valve body driving member. In this embodiment, the 1st valve body drive member and the 2nd valve body drive member are located on the said straight line L1. Therefore, the operating force is efficiently transmitted to each driving member. Further, a mechanism for changing the direction of the operating force is not required. Furthermore, the shaft member 110 is also a third valve body driving member that moves the third valve body 113. By sharing the second valve body drive member and the third valve body drive member, connection of the drive members is not required. Therefore, reliability and productivity are improved.

  The first valve body driving member (ball holder 101c) and the second valve body driving member (shaft member 110) are directly connected. Therefore, the operation force is transmitted efficiently and reliably, and the interlocking reliability is increased. Further, the connection structure is simplified, and the reliability and productivity are improved.

  In addition to the vertical arrangement of each member as described above, in this embodiment, the operation button 14, the switching unit 12, the cover member 20, and the water guide unit 10 are arranged in a vertical row. Therefore, when the operation button 14 is pressed, most of the stress acting on each member is in the columnar arrangement direction, that is, the X direction, and the stress hardly acts in the Y direction. Although the force in the Y direction can be a force in the direction of bending each member, the force in the bending direction hardly acts due to the above-described tandem arrangement. As a result, the durability of each member is improved. Moreover, it becomes possible to suppress the thickness of each member, and size reduction and weight reduction are attained.

  As shown in FIG. 2, the main body portion 4 includes a main body base shaft portion 4 a and a main body branching portion 4 b. The main body branching portion 4 b extends from the main body base shaft portion 4 a toward the water guide portion 10. The extending direction of the main body branching portion 4b coincides with the direction of the above-described columnar arrangement. The longitudinal direction of the main body branching portion 4b is the direction X. With this configuration, the force in the direction Y is difficult to act. With this configuration, the durability of the faucet device as a whole against the stress when the operation button 14 is pushed is improved. In addition, from the viewpoint of enhancing durability against stress when the operation button 14 is pushed in, the main body portion 4 is preferably made of metal, and the main body base shaft portion 4a and the main body branching portion 4b are formed as an integrally formed body made of metal. More preferably.

  In FIG. 2, the reference numeral 4a1 indicates the extending direction (longitudinal direction) of the main body base shaft portion 4a. In FIG. 2, what is indicated by reference numeral 4b1 is the extending direction (longitudinal direction) of the main body branching portion 4b. In FIG. 2, what is indicated by a double arrow α is an angle formed by the direction 4a1 and the direction 4b1. The main body branching portion 4b extends obliquely from below to above in the direction of the angle α with respect to the extending direction 4a1 of the main body branching portion 4b.

  From the viewpoint of enhancing durability when the operation button 14 is pushed in, the angle α is preferably 30 degrees or more, and more preferably 45 degrees or more. From the viewpoint of improving the usability of the faucet device 2, the angle α is preferably 90 degrees or less, more preferably 80 degrees or less, and even more preferably 70 degrees or less. The extending direction 4a1 of the main body base shaft portion 4a is preferably 80 degrees or more, more preferably 85 degrees or more, and particularly preferably 90 degrees with respect to the horizontal direction.

  As described above, at the first position P1, the water discharge Wa passes through the two valves (the first valve 101 and the third valve 103). At the first position P1, a branch channel A1 is formed. For this reason, the flow volume of discharged water Wa can be enlarged, without enlarging an apparatus. When the water discharge Wa is raw water as in the above embodiment, the flow rate of the raw water can be increased. Therefore, for example, a sufficient flow rate can be ensured in applications where raw water is used (such as washing applications such as dishwashing). In the present embodiment, the flow rate of the discharged water Wa can be made larger than the flow rate of the discharged water Wb. Therefore, the diversity of water discharge increases and the faucet device 2 excellent in convenience can be realized.

  In FIG. 12, what is indicated by a double-headed arrow θ1 is an angle of the slope portion 110b with respect to the center line Z1. From the viewpoint of expanding the flow path area of the second valve 102, the angle θ1 is preferably 30 degrees or more, and more preferably 45 degrees or more. From the viewpoint of suppressing pressure loss, the angle θ1 is preferably 60 degrees or less. In the above embodiment, θ1 is 45 degrees.

  In FIG. 12, what is indicated by a double-headed arrow θ2 is the inclination angle of the contact surface h21 with respect to the center line Z1. From the viewpoint of expanding the flow path area of the second valve 102, the angle θ2 is preferably 30 degrees or more, and more preferably 45 degrees or more. From the viewpoint of suppressing pressure loss, the angle θ2 is preferably 60 degrees or less. In the above embodiment, θ2 is 45 degrees. When the second valve 102 is closed, the contact surface h21 and the slope portion 110b face each other.

  From the viewpoint of ensuring the contact between the second valve body 112 and the contact surface h21, the absolute value of the difference (θ1-θ2) is preferably 10 degrees or less, more preferably 5 degrees or less, and more preferably 0 degrees. . In the rule embodiment, the absolute value of the difference (θ1−θ2) is 0 degree.

  In order to suppress problems such as turning over, the second valve body 112 (O-ring) is usually coated with a lubricant such as grease. This lubricant gradually flows out by use of the faucet device 2. When the lubricant flows out, the second valve body 112 (O-ring) is fixed to the second valve body mounting portion 110a. This sticking causes problems such as turning over, and the sealing performance can be reduced.

  As shown in FIG. 12, when the operating portion 14 is at the second position P2, the second valve body 112 is separated from the second valve body valve hole h2. In this state, water can flow around the second valve body 112. The water flowing around plays the role of a lubricant, and the sticking of the second valve body 112 is suppressed. Therefore, the sealing performance of the second valve body 112 can be maintained for a long time.

  In order to suppress problems such as turning over, the third valve body 113 (U packing) is usually coated with a lubricant such as grease. This lubricant gradually flows out by use of the faucet device 2. When the lubricant flows out, the third valve body 113 (U packing) is fixed to the third valve body mounting portion 110d. This sticking causes problems such as turning over, and the sealing performance can be reduced.

  As shown in FIG. 11, when the operating portion 14 is in the first position P1, the third valve body 113 is separated from the third valve body valve hole h3. In this state, water can flow around the third valve body 113. The water circulating in the surroundings plays the role of a lubricant, and the sticking of the third valve body 113 is suppressed. Therefore, the sealing performance of the third valve body 113 can be maintained for a long time.

  The material of the switching shaft member 42 is preferably resin. Examples of preferable resins include polyoxymethylene (POM), polyphenylene sulfide (PPS), acrylonitrile butadiene styrene copolymer (ABS), and polypropylene (PP). From the viewpoint of heat resistance, polyoxymethylene (POM) and polyphenylene sulfide (PPS) are more preferable. Further, from the viewpoint of improving the positional accuracy of the first valve body 101b (ball) and the like, the switching shaft member 42 is preferably highly elastic. From this viewpoint, the material of the switching shaft member 42 is more preferably polyoxymethylene (POM). In the above embodiment, polyoxymethylene (POM) was used.

  Examples of the material of the ball (first valve body 101b) include stainless steel, polycarbonate resin (PC), and brass. In order to close the first valve 101 reliably, it is better that the weight of the ball is larger. From this viewpoint, stainless steel or brass is preferable, and stainless steel is more preferable in consideration of corrosion resistance.

  The U packing is a lip packing having a substantially U-shaped section. U-packing has good sealing properties and low sliding resistance. Examples of the material of the U packing include rubber and elastomer. Examples of the rubber include NBR (acrylonitrile butadiene rubber), EPDM (ethylene propylene diene rubber), 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 preferable, and EPDM is more preferable in view of cost.

  Examples of the material of the 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.

  FIG. 19 shows the discharge unit 9 equipped with an operation button mechanism 134 different from the operation button mechanism 34 in the embodiment described above. The operation button mechanism 134 employs a second urging member different from the conical coil spring 19 described above. The operation button mechanism 134 of FIG. 19 is in the third position P3. In the operation button mechanism 134, the conical coil spring 19 is not mounted. The operation button mechanism 134 includes another coil spring 119 as a second urging member. This is called a second coil spring 119. The second coil spring 119 is mounted between the first switching member 36 and the switching shaft member 142. A protrusion 135 is provided on the bottom surface of the operation unit 114 in place of the spring seat. The protrusion 135 is inserted inside the main body 39 of the second switching member 38 for positioning. The operation unit 114 is in direct contact with the second switching member 38 without using the second urging member. These points are differences between the operation button mechanism 134 of FIG. 19 and the operation button mechanism 34 shown in FIGS. 11 to 13. In the operation button mechanism 134 of FIG. 19, the same components as those of the operation button mechanism 34 are denoted by the same reference numerals, and the description thereof is omitted.

  As shown in FIG. 19, the push rod 150 of the switching shaft member 142 has a bottomed cylindrical shape. In other words, the push rod 150 is formed with a cylindrical cavity 151 coaxially. In the cylindrical cavity 151, the second coil spring 119 is inserted in a compressed state. The second coil spring 119 has a smaller spring constant and initial set spring load than the first coil spring 44 described above. A bushing 152 is interposed between the second coil spring 119 and the first switching member 36. The rear end of the bush 152 and the bottom of the cylindrical cavity 151 constitute a spring seat. Instead of using the bush 152, the rear end face of the first switching member 36 may be a spring seat. For this purpose, the rear end face of the first switching member 36 may be changed to an appropriate shape.

  The operating portion 114 is pushed forward via the rib 15 by the spring force of the first coil spring 44. In the present embodiment, a slight gap is formed between the first switching member 36 and the switching shaft member 142. Therefore, the spring force of the first coil spring 44 does not act on the first switching member 36 and the second switching member 38. The second coil spring 119 is interposed in a compressed state so as to fill this gap. In order to rotate the first switching member 36, the second coil spring 119 is pressed against the second switching member 38 with both a small initial spring load and a small spring constant. Therefore, each time the position is switched, the force with which the first switching member 36 collides with the pressing protrusion 39a of the second switching member 38 is small. At the same time, the force with which the first switching member 36 collides with the deep groove 41a and the shallow groove 41b of the switching ring 40 is also small. For this reason, a large impact and vibration are not applied to the finger of the user who is pressing the operation unit 114. As described above, the operation button mechanism 134 (thrust lock mechanism) greatly reduces the impact, vibration, and operation sound associated with the alternate operation.

  The initial setting spring load, the spring constant, the ratio of the initial setting spring load to the first coil spring 44, and the ratio of the spring constant to the first coil spring 44 of the second coil spring 119 are respectively the cones described above. The initial spring load and spring constant of the coil spring 19 are equal to the ratio of the initial spring load to the first coil spring 44 and the ratio of the spring constant to the first coil spring 44. In addition to the second coil spring 119, the above-described conical coil spring 19 may be mounted between the operation portion 14 and the second switching member 38. In this case, the urging forces of the two spring members 19 and 119 act on the first switching member 36 in series.

  In the above embodiment, the coil spring 119 is used as the second urging member, but it is not limited to this configuration. In place of the coil spring, a leaf spring may be employed. For example, a leaf spring may be attached to the front end surface of the switching shaft member 142 in a cantilever shape. And you may make it the rear end of the main body 37 of the 1st switching member 36 contact | abut to the free end vicinity of this leaf | plate spring. It is also possible to employ a flexible elastic material such as rubber as the second urging member. For example, a flexible elastic material may be attached to the rear end of the main body 37 of the first switching member 36 and / or the front end surface of the switching shaft member 142.

  As described above, in the above-described embodiment, a switching mechanism in which impact, vibration, and operating noise during operation are effectively reduced with a small and simple configuration is realized.

  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 operation button mechanism described above can be used in a faucet device for any application.

DESCRIPTION OF SYMBOLS 2 ... Water faucet device 4 ... Main-body part 6 ... Lever handle 8, 9 ... Discharge part 10 ... Water guide part 12 ... Switching part 14, 114 ... Operation part (button)
DESCRIPTION OF SYMBOLS 15 ... Rib 16 ... Water shape adjustment part 18 ... Discharge port 19 ... Conical coil spring 20 ... Cover member 21 ... Second cover member 22 ... Pressing surface 24 ... -Side surfaces of the cover member 34, 134 ... operation button mechanism 35 ... case 42, 142 ... switching shaft member 68 ... water purification cartridge 70B ... water purification channel (channel B)
72 ... Water purification section 76A ... Raw water flow path (flow path A)
DESCRIPTION OF SYMBOLS 100 ... Switching mechanism 101 ... 1st valve 101a ... Valve seat 101a
101b ... first valve body (ball)
102 ... Second valve 103 ... Third valve 110 ... Shaft member 112 ... Second valve body 113 ... Third valve body 119 ... Coil spring 135 ... Protrusion

Claims (7)

In the faucet device, an operation button mechanism for performing a switching operation of the switching mechanism in order to switch the flow path,
An operation button that can be operated in the direction X;
A first urging member for urging the operation button in the counter-operation direction;
A second urging member having a smaller urging force than the first urging member;
A first switching member and a second switching member capable of performing a cam action ;
A switching shaft member coupled to the switching mechanism and the operation button ;
The first switching member is rotatable about an axis relative to the second switching member;
The second biasing member biases the second switching member so that the first switching member can be rotated by the cam action,
With the operation of the operation button against the urging force of the first urging member, the second urging member rotates the first switching member with respect to the second switching member, and the first position and the second position Configured to be able to switch to
In the first position, the switching mechanism is configured to select one flow path, and in the second position, the switching mechanism is configured to select another flow path ,
The first biasing member biases the operation button and the switching shaft member in the counter-operation direction,
The first switching member, the second switching member, and the switching shaft member are configured to move in the direction X when the operation button is operated.
An operation button mechanism in which the spring force of the first urging member does not act on the first switching member and the second switching member . Upper Symbol second biasing member, said operating button and said is interposed between the first switching member and the second switching member, the operation button mechanism according to claim 1. The the second biasing member, and the switching shaft member, is interposed between the first switching member and the second switching member, the operation button mechanism according to claim 1. The operation according to any one of claims 1 to 3 , wherein the operation button, the first switching member, the second switching member, the switching shaft member, the first biasing member, and the second biasing member are arranged coaxially. Button mechanism. It is further equipped with a fixed switching ring,
The first switching member and the second switching member are configured to move in the direction X by the operation of the operation button,
Within the range of movement of the first switching member, a rotatable region where rotation of the first switching member relative to the second switching member is allowed and a non-rotatable region where rotation is restricted by the switching ring are formed. The operation button mechanism according to any one of claims 1 to 4.   The operation button mechanism according to any one of claims 1 to 5, wherein the second urging member includes one or more of a coil spring, a leaf spring, and an elastic member. A water guide section including a flow path A and a flow path B;
A switching mechanism for switching between the channel A and the channel B;
And an operation button mechanism for performing a switching operation of the switching mechanism,
A faucet device, wherein the operation button mechanism is constituted by the operation button mechanism according to any one of claims 1 to 6.

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