CN111788364B

CN111788364B - Water tap

Info

Publication number: CN111788364B
Application number: CN201980014565.6A
Authority: CN
Inventors: 安田秀和; 高桥良和; 万木彬生; 中岛高志
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2018-03-30
Filing date: 2019-03-22
Publication date: 2021-12-07
Anticipated expiration: 2039-03-22
Also published as: CN111788364A; TWI691633B; TW201942451A; JP6952269B2; WO2019188792A1; JPWO2019188792A1

Abstract

The faucet includes a spout, a switching valve, an operation unit, and an override mechanism, wherein the switching valve is provided at a position where a hydraulic resistance when moving from the 1 st position to the 2 nd position is smaller than a hydraulic resistance when moving from the 2 nd position to the 1 st position.

Description

Water tap

Technical Field

The invention relates to a faucet.

Background

Conventionally, faucets used in kitchens, toilets and the like have been disclosed (for example, see patent document 1). The faucet disclosed in patent document 1 includes a nozzle forming a water spout, and a button attached to a tip end of the nozzle. Through the operation of button, can switch directly spout water and gondola water faucet water spray.

A spring for biasing the button forward is provided inside the nozzle. When the user presses the button, the button moves from the front position to the rear position against the urging force of the spring and is held at the rear position. At this time, the shower head sprays water. If the user further presses the button, the button returns from the rear position to the front position by the urging force of the spring and is held at the front position. At this time, the water is sprayed straight.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2005-16032

Disclosure of Invention

Problems to be solved by the invention

In the structure of patent document 1, since the push button is returned by the biasing force of the spring, if the biasing force of the spring is insufficient, the push button may not return and may not normally operate. In order to prevent this, it is necessary to deal with the increase in the biasing force of the spring. In the mechanism for operating the push button by the biasing force of the spring, there is still room for improvement in the normal operation of the push button.

Accordingly, an object of the present invention is to solve the above-described problems and to provide a faucet capable of operating a push button more regularly in a mechanism for operating the push button by biasing of a spring.

Means for solving the problems

In order to achieve the above object, a faucet according to the present invention includes: a nozzle having an upstream-side flow path, a 1 st downstream-side flow path and a 2 nd downstream-side flow path that branch off downstream of the upstream-side flow path, and a connecting flow path that connects the upstream-side flow path and the 1 st and 2 nd downstream-side flow paths, the nozzle extending in an axial direction; a switching valve provided in the connection channel and movable between a 1 st position and a 2 nd position, the 1 st position closing an inlet of the 1 st downstream channel to communicate the upstream channel with the 2 nd downstream channel, and the second position closing an inlet of the 2 nd downstream channel to communicate the upstream channel with the 1 st downstream channel; a position holding mechanism for holding the switching valve at each of the 1 st position and the 2 nd position, the position holding mechanism including a biasing member for biasing the switching valve toward the 2 nd position; and an operation unit that moves the switching valve between the 1 st position and the 2 nd position by a user operation; the switching valve is provided at a position where a hydraulic resistance received when the switching valve moves from the 1 st position to the 2 nd position is smaller than a hydraulic resistance received when the switching valve moves from the 2 nd position to the 1 st position.

Effects of the invention

According to the faucet of the present invention, the button can be operated more regularly.

Drawings

Fig. 1 is a schematic configuration diagram of a faucet according to an embodiment.

Fig. 2 is a schematic configuration diagram of a faucet according to an embodiment.

Fig. 3 is a side view of the mouth of an embodiment.

Fig. 4 is a bottom view of the mouth of an embodiment.

Fig. 5 is a sectional view a-a of fig. 3.

Fig. 6 is a sectional view B-B of fig. 4.

Fig. 7 is an enlarged longitudinal sectional view of the periphery of the switching valve of the embodiment.

Fig. 8A is a longitudinal sectional view showing the switching valve at the 1 st position and its periphery.

Fig. 8B is a longitudinal sectional view showing the switching valve at the 2 nd position and its periphery.

Fig. 9 is a view showing the inside of the nozzle when viewed from the flow path direction of the upstream side flow path.

Fig. 10 is a cross-sectional view showing a modified switching valve and its periphery.

Fig. 11 is a perspective view showing a flow rate adjustment plate according to a modification.

Fig. 12 is a perspective view showing a flow rate adjustment plate according to another modification.

Fig. 13 is a perspective view showing a flow rate adjustment plate according to another modification.

Detailed Description

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the embodiment.

(embodiment mode)

Fig. 1 and 2 are schematic perspective views of a faucet 2 according to the embodiment. Fig. 1 shows a state in which the spout 6 of the faucet 2 is stored, and fig. 2 shows a state in which the spout 6 is pulled out forward. Fig. 3 and 4 are schematic diagrams illustrating the structure of the nozzle 6. Fig. 3 is a side view of the spout 6, and fig. 4 is a bottom view of the spout 6.

The faucet 2 shown in fig. 1 and 2 is a single-handle faucet device used in a kitchen, a toilet, or the like. The faucet 2 includes a main body 4 erected on an installation base (not shown), a handle 5, a spout 6, a button 10, and a spout 12. The water spray portion 12 is a member formed with a plurality of water spray holes for spraying hot water, and is also called a "water spray plate" or a "shower surface".

The body portion 4 is a member that integrally supports the stem 5 and the nozzle 6. A button 10 and a water spray portion 12 are attached to the tip of the nozzle 6. The nozzle 6 is also called "sprinkler pipe" or "shower head". The nozzle 6 extends in the axial direction C from a proximal end side connected to the body portion 4 toward a distal end side to which the push button 10 is attached.

The user can switch between the water discharge from the water discharge portion 12 and the stop of the water discharge and can adjust the water discharge temperature and the water discharge amount by operating the lever 5. Further, the user can switch the water spray from the water spray part 12 between the shower water spray and the direct water spray by pressing the button 10. The button 10 is an example of an operation unit for switching the water spray by a user operation. The detailed mechanism for switching the water spray will be described later.

The internal structure of the nozzle 6 shown in fig. 3 and 4 will be described with reference to fig. 5 and 6. Fig. 5 is a sectional view a-a of fig. 3, and fig. 6 is a sectional view B-B of fig. 4.

As shown in fig. 5 and 6, a flow path forming portion 14 is provided inside the nozzle 6. The flow path forming unit 14 is a member that forms a flow path for the hot water sprayed from the water spray unit 12. The flow path forming portion 14 is supplied with hot water from a hot water supply source (not shown) on the upstream side via another flow path forming portion 38.

As shown in fig. 6, the flow path forming section 14 includes a pipe section 15. The pipe portion 15 is a tubular member having a 1 st downstream side flow passage 16 and a 2 nd downstream side flow passage 18 formed therein. The 1 st downstream flow path 16 is a flow path for straight water spraying, and the 2 nd downstream flow path 18 is a flow path for shower water spraying. The 1 st downstream side flow passage 16 and the 2 nd downstream side flow passage 18 are connected to the water ejection holes of the water ejection part 12.

The flow path forming section 14 further includes a flow path switching section 20 for selectively switching the 1 st downstream flow path 16 and the 2 nd downstream flow path 18. The flow path switching unit 20 includes a switching valve 22 (fig. 6), a valve holding unit 24, a cam mechanism 26 (fig. 5), a link 28, and a position holding mechanism 30.

The switching valve 22 is a valve body that selectively closes one of the 1 st downstream flow path 16 and the 2 nd downstream flow path 18. The switching valve 22 of the present embodiment is a ball valve provided to be capable of rotating about the axial direction C of the nozzle 6. The switching valve 22 is rotatable between a position (1 st position) at which the inlet 16A of the 1 st downstream side flow passage 16 is closed and a position (2 nd position) at which the inlet 18A of the 2 nd downstream side flow passage 18 is closed. Fig. 6 shows the state where the switching valve 22 is in the 1 st position. In this state, shower water is sprayed from the water spray part 12 through the 2 nd downstream side flow path 18.

The valve holding portion 24 is a member that holds the switching valve 22. The valve holding portion 24 is connected to a cam mechanism 26 (fig. 5). The cam mechanism 26 is a member that converts linear motion in the axial direction C, which is performed by pushing the push button 10, into rotational motion about the axial direction C of the nozzle 6. The cam mechanism 26 is connected to the 2 nd link 28b of the link 28.

The link 28 is a member that connects the cam mechanism 26 and a position holding mechanism 30 described later to each other. The link 28 is mounted inside the push button 10 and moves in the axial direction C of the mouth 6 in response to the push-in of the push button 10. The link 28 includes a 1 st link 28a and a 2 nd link 28b as two bifurcated branches. The 1 st link 28a is connected to the position holding mechanism 30, and the 2 nd link 28b is connected to the cam mechanism 26.

The position holding mechanism 30 is a mechanism that maintains two states, i.e., a pushed-in state and a non-pushed-in state of the push button 10. That is, the position holding mechanism 30 has a function of holding the switching valve 22 at each of the 1 st position and the 2 nd position. The position holding mechanism may also be referred to as a "wheel mechanism". The 1 st position of the switching valve 22 shown in fig. 5 and 6 corresponds to the pushed-in state of the push button 10, and the 2 nd position of the switching valve 22 corresponds to the non-pushed-in state of the push button 10.

As shown in fig. 5, the position holding mechanism 30 includes a push-type

mechanism including springs

32A, 32B and the like. The

springs

32A and 32B in the present embodiment are examples of biasing members that function to bias the switching valve 22 toward the 2 nd position. In the 1 st position shown in fig. 6, the

springs

32A and 32B bias the switching valve 22 to the 2 nd position, and the position holding mechanism 30 maintains the 1 st position.

In the above configuration, when the switching valve 22 is in the 2 nd position, which is a non-pushed-in state, the push button 10 is pushed to move to the 1 st position against the biasing force of the

springs

32A and 32B. In the 1 st position, shower water is sprayed from the water spray portion 12. If the push button 10 is further pushed from this state, the state of the switching valve 22 by the position holding mechanism 30 is maintained and released. Thereby, the switching valve 22 is moved to the 2 nd position by the biasing force of the

springs

32A and 32B. In the 2 nd position, the straight water spraying is performed. By such a pressing operation of the push button 10, the position of the switching valve 22 is switched between the 1 st position and the 2 nd position, and the shower water spray and the direct water spray can be switched.

The configuration around the switching valve 22 will be described with reference to fig. 7. Fig. 7 is an enlarged longitudinal sectional view of the periphery of the switching valve 22.

As shown in fig. 7, an upstream flow path 34 and a connecting flow path 36 are provided in the nozzle 6 in addition to the 1 st downstream flow path 16 and the 2 nd downstream flow path 18.

The upstream flow path 34 is the most upstream flow path among the flow paths provided in the nozzle 6. The upstream flow path 34 is provided on the upstream side of the connection flow path 36, and is connected to the connection flow path 36. The upstream flow path 34 is formed by another flow path forming portion 38. The hot water having the adjusted temperature and flow rate is supplied to the upstream flow path 34 from the main body 4 (fig. 1 and 2).

The connection channel 36 is a channel connecting the upstream channel 34 with the 1 st downstream channel 16 and the 2 nd downstream channel 18. The connection flow path 36 is provided between the upstream flow path 34 and the 1 st downstream flow path 16 and the 2 nd downstream flow path 18. As shown in fig. 7, the switching valve 22 and the valve holding portion 24 are disposed in the connection flow path 36. Fig. 7 shows a state in which the switching valve 22 is in the 2 nd position for closing the 2 nd downstream side flow passage 18.

As shown in fig. 7, an orifice 39 is formed in the boundary between the upstream flow passage 34 and the connecting flow passage 36. The orifice 39 is formed by an orifice plate 40 protruding inward from the inner peripheral wall of the flow path forming portion 38. The orifice 39 constitutes an outlet 34A of the upstream side flow passage 34.

When hot water flows through the nozzle 6, the water flow W from the upstream flow path 34 impinges on the side surface 24A of the valve holding portion 24. The hydraulic resistance R when the switching valve 22 held by the valve holding portion 24 moves between the 1 st position and the 2 nd position acts thereon.

The hydraulic resistance R received when the selector valve 22 is in each of the 1 st position and the 2 nd position will be described with reference to fig. 8A and 8B. Fig. 8A shows a state where the switching valve 22 is in the 1 st position, and fig. 8B shows a state where the switching valve 22 is in the 2 nd position.

In the present embodiment, the hydraulic resistance R1 received at the 1 st position shown in fig. 8A is designed to be smaller than the hydraulic resistance R2 received at the 2 nd position shown in fig. 8B. Specifically, the positional relationship among the plurality of

flow paths

16, 18, and 34 and the positions of the switching valve 22 and the valve holding portion 24 are set at predetermined positions. By setting as above, the hydraulic resistance received by the switching valve 22 when moving from the 1 st position to the 2 nd position

Is higher than the hydraulic resistance when moving from the 2 nd position to the 1 st position

Is small. As described above, when the switching valve 22 moves from the 1 st position to the 2 nd position, the switching valve 22 moves due to the biasing force of the

springs

32A and 32B of the position holding mechanism 30. At this time, the hydraulic resistance received by the switching valve 22

Since the setting is small, the switching valve 22 can be moved and returned even when the biasing force of the

springs

32A and 32B is small. This enables the button 10 to operate normally.

On the other hand, when the switching valve 22 moves from the 2 nd position to the 1 st position, the push button 10 is pressed against the biasing force of the

springs

32A and 32B, and the switching valve 22 moves. The hydraulic resistance (≈ R2) at this time is set to be large, but unlike the case of using the biasing force of the

springs

32A and 32B, the switching valve 22 can be reliably moved as long as the user increases the biasing force.

In order to calculate or measure the hydraulic resistances R1, R2 at the 1 st and 2 nd positions, for example, values of the pressing force (maximum value) of the push button 10 required to move the switching valve 22 measured by the load cell may be indirectly calculated by referring to the hydraulic resistances R1, R2. The dynamometer may also use a normal commercially available dynamometer. Alternatively, pressure gauges may be provided in the connection flow path 36 to directly calculate the hydraulic resistances R1 and R2.

In order to achieve the relationship of hydraulic resistance as described above, the faucet 2 of the present embodiment is designed to elaborate the positional relationship as shown in fig. 9. Fig. 9 is a view showing the inside of the nozzle 6 when viewed from the flow path direction of the upstream flow path 34 (the axial direction C of the nozzle 6).

As shown in fig. 9, the outlet 34A (orifice 39) of the upstream flow path 34 is formed in a circular shape in cross section. There is a center 34C at the outlet 34A of the upstream side flow path 34. The inlet 16A of the 1 st downstream flow path 16 and the inlet 18A of the 2 nd downstream flow path 18 are positioned in front of the outlet 34A of the upstream flow path 34 (the tip side of the nozzle 6) via the connecting flow path 36. Both the inlet 16A and the inlet 18A are formed to have a circular cross section. There is a center 16C at inlet 16A and a center 18C at inlet 18A.

As shown in fig. 9, the center 16C of the inlet 16A is located above the center 34C of the outlet 34A. On the other hand, the center 18C of the inlet 18A is located below the center 34C of the outlet 34A.

The distance (sectional distance, height distance) D1 from the center 16C to the center 34C is set longer than the distance (sectional distance, height distance) D2 from the center 34C to the center 18C. With such a setting, in the vertical cross section shown in fig. 9, the inlet 16A of the 1 st downstream flow path 16 is located farther than the inlet 18A of the 2 nd downstream flow path 18 with respect to the outlet 34A of the upstream flow path 34. Thus, in the 1 st position where the switching valve 22 blocks the inlet 16A of the 1 st downstream flow path 16, the area of the water flow W directly impinging on the side surface 24A of the valve holding portion 24 is smaller than in the 2 nd position. Therefore, the hydraulic resistance R received by the switching valve 22 also decreases. By setting the positions of the

centers

16C, 18C, and 34C, the hydraulic resistance R1 received at the 1 st position shown in fig. 8A can be made smaller than the hydraulic resistance R2 received at the 2 nd position shown in fig. 8B.

Further, since the 1 st downstream side flow path 16 is located above the 2 nd downstream side flow path 18, when the switching valve 22 moves from the 1 st position to the 2 nd position, the propulsive force due to the gravity can be received. Since the urging force of gravity can be used in addition to the urging forces of the

springs

32A and 32B, the switching valve 22 can be reliably moved even when the urging forces of the

springs

32A and 32B are smaller. This enables the button 10 to operate normally.

Further, since the 1 st downstream side flow path 16 and the 2 nd downstream side flow path 18 are arranged in the vertical direction, the dimension of the nozzle 6 in the width direction X can be shortened. This makes it possible to make the spout 6 thin and improve the design of the faucet 2.

As described above, the faucet 2 of the present embodiment includes the spout 6, the push button 10, the switching valve 22, and the position holding mechanism 30. The nozzle 6 has an upstream flow path 34, a 1 st downstream flow path 16, a 2 nd downstream flow path 18, and a connecting flow path 36 formed therein. The switching valve 22 is movable between a 1 st position at which the inlet 16A of the 1 st downstream flow path 16 is blocked and the upstream flow path 34 and the 2 nd downstream flow path 18 communicate with each other, and a 2 nd position at which the inlet 18A of the 2 nd downstream flow path 18 is blocked and the upstream flow path 34 and the 1 st downstream flow path 16 communicate with each other. The push button 10 is an operation unit that moves the switching valve 22 between the 1 st position and the 2 nd position by a pressing operation of a user. The position holding mechanism 30 is a mechanism that holds the switching valve 22 at each of the 1 st position and the 2 nd position, and includes

springs

32A and 32B that urge the switching valve 22 toward the 2 nd position. The switching valve 22 is provided to be resistant to the hydraulic pressure when moving from the 1 st position to the 2 nd position

A small position.

With such a configuration, when the switching valve 22 is moved from the 2 nd position to the 1 st position, the push button 1 is pushed0 overcomes the spring force, and when the 1 st position is returned to the 2 nd position, the switching valve 22 is returned by the biasing forces of the

springs

32A and 32B. The hydraulic resistance received when the switching valve 22 is returned by the biasing force of the

springs

32A and 32B

Set to be more resistant to hydraulic pressure than in the case where the switching valve 22 is moved in the reverse direction

Since the biasing force is small, the switching valve 22 is reliably returned as long as the biasing force is set to exceed the hydraulic resistance. With this configuration, the switching valve 22 can be reliably returned even if the spring force is set to be small, and the push button 10 can be normally operated in the mechanism that operates the push button 10 by the biasing force of the

springs

32A and 32B.

Further, according to the faucet 2 of the present embodiment, in a cross section viewed from the flow path direction of the upstream side flow path 34, the center 16C of the inlet 16A of the 1 st downstream side flow path 16 is located farther from the center 34C of the outlet 34A of the upstream side flow path 34 than the center 18C of the inlet 18A of the 2 nd downstream side flow path 18.

With this configuration, the inlet 16A of the 1 st downstream flow path 16 is farther from the outlet 34A of the upstream flow path 34 than the inlet 18A of the 2 nd downstream flow path 18, and the hydraulic resistance R1 received by the switching valve 22 at the 1 st position where the inlet 16A is blocked is also smaller. Thus, a configuration in which the hydraulic resistance (≈ R1) received when the switching valve 22 moves from the 1 st position to the 2 nd position is smaller than the hydraulic resistance (≈ R2) received when the switching valve 22 moves from the 2 nd position to the 1 st position can be easily realized.

Further, according to the faucet 2 of the present embodiment, in a cross section viewed from the flow path direction of the upstream flow path 34, the center 16C of the inlet 16A of the 1 st downstream flow path 16 is located above the center 18C of the inlet 18A of the 2 nd downstream flow path 18.

According to such a configuration, when the switching valve 22 moves from the 1 st position for closing the 1 st downstream side flow path 16 to the 2 nd position for closing the 2 nd downstream side flow path 18, the switching valve can receive a thrust force due to gravity in addition to the biasing force of the spring. Thus, even if the biasing force of the spring is further reduced, the switching valve 22 can be reliably moved, and the push button 10 can be normally operated.

In addition, according to the faucet 2 of the present embodiment, the 1 st downstream side flow path 16 and the 2 nd downstream side flow path 18 are arranged in the vertical direction.

In this way, the two downstream

side flow paths

16 and 18 are arranged in the vertical direction, whereby the lateral dimension of the nozzle 6 can be reduced. This improves the design of the faucet 2.

Further, according to the faucet 2 of the present embodiment, the switching valve 22 is provided at a position where the hydraulic resistance R1 received at the 1 st position is smaller than the hydraulic resistance R2 received at the 2 nd position.

With such a configuration, the hydraulic resistance to be applied when moving from the 1 st position to the 2 nd position can be easily realized

Small in size.

The present invention is not limited to the above embodiments, and can be implemented in other various forms. For example, in the embodiment, the case where the faucet 2 is a single-handle faucet device has been described, but the faucet is not limited to this case, and may be a faucet device other than a single-handle faucet device.

In the embodiment, the case where the center 16C of the inlet 16A of the 1 st downstream flow path 16 is provided at a position farther from the center 34C of the outlet 34A of the upstream flow path 34 than the center 18C of the inlet 18A of the 2 nd downstream flow path 18 has been described, but the present invention is not limited to this case. The distance D1 from the center 16C to the center 34C and the distance D2 from the center 34C to the center 18C may also be set to be the same. Even in such a case, the magnitude relation of the hydraulic resistance shown in fig. 8A and 8B can be realized by maintaining the vertical relation between the inlet 16A of the 1 st downstream flow path 16 and the inlet 18B of the 2 nd downstream flow path 18, changing the shape of the side surface 24A of the valve holding portion 24 that receives the water flow W, and the like.

In the embodiment, the case where two

springs

32A and 32B are provided as the

springs

32A and 32B of the position holding mechanism 30 has been described, but the number, the position, and the like of the springs are not limited thereto. Any spring may be used as long as it has a function of biasing the switching valve 22 toward either of the 1 st position and the 2 nd position.

In the embodiment, the

springs

32A and 32B are exemplified as the urging member for urging the switching valve 22, but the present invention is not limited to this case. Any biasing member other than a spring may be used as long as it has a function of biasing the switching valve 22.

In the embodiment, the push button 10 is exemplified as an example of an operation unit for switching the position of the switching valve 22 by the user, but the present invention is not limited to this case. The position of the switching valve 22 may be switched by an operation other than the pressing operation (for example, twisting or rotating), or an operation portion of any form may be used.

In the embodiment, the case where the water flow W having passed through the upstream flow path 34 is directly flushed onto the side surface portion 24A of the valve holding portion 24 has been described, but the present invention is not limited to this case. For example, the flow rate adjustment plate 52 may be provided as in a modification shown in fig. 10. The flow rate adjustment plate 52 shown in fig. 10 is a disc-shaped member having a plurality of through holes 54 formed in the thickness direction as shown in fig. 11. In the example shown in fig. 10, the flow rate adjustment plate 52 is provided at a position adjacent to the orifice plate 40. The flow rate adjustment plate 52 is fixed by being pressed by a hose (not shown) in a state of being inserted to the position shown in fig. 10, but is not limited to the case of being separate from the flow path forming portion 38, and may be configured integrally with the flow path forming portion 38. With this configuration, the flow rate of the water flow W that is passed through the upstream flow path 34 is reduced when passing through the flow rate adjustment plate 52. This prevents the hydraulic resistance R2 applied to the side surface portion 24A of the valve holding portion 24 from becoming excessively large. Therefore, the position of the switching valve 22 can be easily switched by pressing the push button 10.

The flow rate adjustment plate 52 is not limited to the configuration shown in fig. 10 and 11, and any configuration may be adopted as long as the flow rate of the water flow W can be reduced. For example, the flow

rate adjustment plates

62 and 72 shown in fig. 12 and 13 may be used. The flow rate adjustment plate 62 shown in fig. 12 is a disk-shaped member having a plurality of through holes 64 penetrating therethrough in the thickness direction, and similarly, the flow rate adjustment plate 72 shown in fig. 13 is a disk-shaped member having a plurality of through holes 74 penetrating therethrough in the thickness direction. With this configuration, the flow rate of the water flow W flowing through the upstream flow path 34 can be reduced when passing through the flow

rate adjustment plate

62 or 72. This prevents the hydraulic resistance R2 from becoming excessively large, and the position of the switching valve 22 can be easily switched by pressing the push button 10.

In addition, the above various forms can be combined appropriately to exhibit the respective effects.

The present invention has been fully described in connection with preferred embodiments thereof with reference to the accompanying drawings, but various modifications and alterations will become apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention based on the appended claims unless they depart therefrom. Further, combinations of elements and changes in the order of the elements of the embodiments can be implemented without departing from the scope and spirit of the present invention.

Industrial applicability

The present invention is useful for faucets.

Description of the reference symbols

2 tap

4 main body part

5 handle

6 mouth

8 water jet

10 push buttons (operation part)

12 water spraying part

14 flow passage forming part

15 tube part

16 st flow path

16A inlet

16C center

18 nd 2 nd flow path

18A inlet

18C center

20 flow path switching part

22 switching valve

24 valve holding part

26 cam mechanism

28 connecting rod

30 position holding mechanism (rotating mechanism)

32A, 32B spring (force application component)

34 upstream side flow passage

34A outlet

34C center

36 connecting flow path

38 other flow passage forming part

39 orifice

40 orifice plate

52 flow adjusting plate

54 through hole

62 flow adjusting plate

64 through hole

72 flow adjusting plate

74 through hole

R1, R2 hydraulic resistance

W water flow

Distance D1, D2

In the X width direction

Claims

1. A water tap is composed of a water tap body, a water inlet, a water outlet, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet,

the disclosed device is provided with:

a nozzle having an upstream-side flow path, a 1 st downstream-side flow path and a 2 nd downstream-side flow path that branch off downstream of the upstream-side flow path, and a connection flow path that connects the upstream-side flow path to the 1 st downstream-side flow path and the 2 nd downstream-side flow path, the nozzle extending in an axial direction;

a switching valve provided in the connection channel and movable between a 1 st position and a 2 nd position, the 1 st position closing an inlet of the 1 st downstream channel to communicate the upstream channel with the 2 nd downstream channel, and the 2 nd position closing an inlet of the 2 nd downstream channel to communicate the upstream channel with the 1 st downstream channel;

a position holding mechanism for holding the switching valve at each of the 1 st position and the 2 nd position, the position holding mechanism including a biasing member for biasing the switching valve toward the 2 nd position; and

an operation unit that moves the switching valve between the 1 st position and the 2 nd position by a user operation;

the switching valve is provided at a position where a hydraulic resistance received when the switching valve moves from the 1 st position to the 2 nd position is smaller than a hydraulic resistance received when the switching valve moves from the 2 nd position to the 1 st position,

in a cross section viewed in the flow path direction of the upstream side flow path, a center of an inlet of the 1 st downstream side flow path is located farther from a center of an outlet of the upstream side flow path than a center of an inlet of the 2 nd downstream side flow path.

2. A water tap is composed of a water tap body, a water inlet, a water outlet, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet,

the disclosed device is provided with:

in a cross section viewed from the flow path direction of the upstream side flow path, a center of an inlet of the 1 st downstream side flow path is located above a center of an inlet of the 2 nd downstream side flow path.

3. A water tap is composed of a water tap body, a water inlet, a water outlet, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet,

the disclosed device is provided with:

the 1 st downstream side channel and the 2 nd downstream side channel are arranged in a vertical direction.

4. A water tap is composed of a water tap body, a water inlet, a water outlet, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipe, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet pipe, a water outlet pipes, a water inlet,

the disclosed device is provided with:

the switching valve is provided at a position where the hydraulic resistance received at the 1 st position is smaller than the hydraulic resistance received at the 2 nd position.