AU2018400897B2 - Water discharge head equipped with purification function, water purification cartridge, and water faucet device - Google Patents

Abstract

[Problem] To provide a water purification cartridge which is capable of preventing false recognition of a discharge of water and has excellent reliability. [Solution] This water discharge head 8 has: a restriction member RG1 which can be transitioned between a first state J1 and a second state J2, and which restricts switching from raw water to purified water by a switching mechanism in the first state, and permits switching from raw water to purified water by the switching mechanism in the second state; a water purification cartridge provided with a restriction release unit DR1 which transitions the restriction member RG1 from the first state J1 to the second state J2, and a water-impermeable tip closed outer surface 196; and a water purification cartridge mounting part. The tip closed outer surface 196 faces a raw water flow passage WG. The restriction member RG1 is arranged in a purified water flow passage WJ.

Description

TECHNICAL FIELD

[0001] The present invention relates to a water

discharge head having a water purification function, a

water purification cartridge, and a faucet device.

BACKGROUND

[0002] There has been known a water discharge head that

contains a water purification cartridge and has a water

purification function. JP3454756B2 discloses a shower head

having a water purification function and capable of

switching between a raw water flow path that does not pass

through a water purification cartridge and a purified water

flow path that passes through the water purification

cartridge.

[0003] A water discharge head of this type or a faucet

device equipped with the water discharge head includes a

handling portion capable of switching between raw water

discharge and purified water discharge. Examples of the

handling portion include a push button, a lever, and a

dial. Some faucet devices might further include a display

portion showing which is selected, raw water discharge or

purified water discharge.

[0004] Users can recognize which is selected, raw water

discharge or purified water discharge, through their

handling, display, or the like. Due to a lapse of memory

or the like, a water purification cartridge might not be

inserted to a faucet. Even in such a state, users might

use the faucet with erroneous recognition that the faucet

is discharging purified water. In other words, users might

erroneously recognize that purified water is discharged

although raw water is actually discharged.

PATENT LITERATURE

[0005] Patent Literature 1: JP3454756B2

[0006] International patent application PCT/JP2018/000349 has been filed regarding the problem mentioned above. This application discloses a water discharge head having a water purification function, the water discharge head including: a discharge port; a switching mechanism capable of switching water discharge that is brought from the discharge port between raw water discharge and purified water discharge; a regulation member capable of undergoing a mutual transition between a first state that prevents the switching mechanism from switching from the raw water discharge to the purified water discharge and a second state that permits the switching mechanism to switch from the raw water discharge to the purified water discharge; a water purification cartridge including a deregulation portion that transitions the regulation member from the first state to the second state; and a water purification cartridge receiving portion. The regulation member is in the first state when the water purification cartridge is not attached to the cartridge receiving portion. When the water purification cartridge is attached to the cartridge receiving portion, the deregulation portion makes the regulation member the second state. In the water discharge head, the regulation member is in the first state when the water purification cartridge is not attached to the cartridge receiving portion, thereby preventing switching from the raw water discharge to the purified water discharge. Therefore, erroneous recognition on water discharge can be prevented.

[0007] The inventors of the present disclosure have found that there is room for further improvement in the faucet including the regulation member. Some embodiments of the present invention may provide a water discharge head and a water purification cartridge that prevent erroneous recognition on water discharge and achieve excellent reliability.

[0007a] It is desired to address or ameliorate one or more disadvantages or limitations associated with the prior art, or to at least provide a useful alternative.

SUMMARY

[0008] According to an aspect, a water discharge head having a water purification function includes: a discharge port; a raw water flow path; a purified water flow path; a switching mechanism capable of switching water discharge that is brought from the discharge port between raw water discharge and purified water discharge; a regulation member capable of undergoing a mutual transition between a first state that prevents the switching mechanism from switching from the raw water discharge to the purified water discharge and a second state that permits the switching mechanism to switch from the raw water discharge to the purified water discharge; a water purification cartridge including a deregulation portion that transitions the regulation member from the first state to the second state, and a front end closing outer surface that is impervious to water; and a cartridge receiving portion. The regulation member is in the first state when the water purification cartridge is not attached to the cartridge receiving portion. When the water purification cartridge is attached to the cartridge receiving portion, the deregulation portion makes the regulation member the second state. The front end closing outer surface faces the raw water flow path. The regulation member is disposed in the purified water flow path.

[0009] [Deleted]

[0010] [Deleted]

[0011] [Deleted]

BRIEF DESCRIPTION OF DRAWINGS

[0012] Some embodiments of the present invention are here

inafter described, by way of example only, with reference to

the accompanying drawings, in which:

FIG. 1 is a perspective view of a faucet device

according to a first embodiment.

FIG. 2 is a front view of a water discharge head included in the faucet device in FIG. 1. FIG. 3(a) is a cross-sectional view of the water discharge head taken along line a-a in FIG. 3(b), and FIG. 3(b) is a cross-sectional view of the water discharge head taken along line b-b in FIG. 3(a). FIG. 4(a) is a cross-sectional view of the water discharge head taken along line a-a in FIG. 4(b), and FIG. 4(b) is a cross-sectional view of the water discharge head taken along line b-b in FIG. 4(a). FIG. 5 is an exploded perspective view of the water discharge head in FIG. 1. FIG. 6(a) is a perspective view of a regulation member, FIG. 6(b) is also a perspective view as viewed from a different angle from that in FIG. 6(a), FIG. 6(c) is a side view of the regulation member, and FIG. 6(d) is a plan view of the regulation member. FIG. 7(a) is a perspective view of a ball holder included in a purified water cut-off valve, FIG. 7(b) is also a perspective view as viewed from a different angle from that in FIG. 7(a), FIG. 7(c) is a side view of the ball holder, and FIG. 7(d) is a plan view of the ball holder. FIG. 8 is a perspective view of a water purification cartridge. FIG. 9(a) is a side view of the water purification cartridge, FIG. 9(b) is a front view of the water purification cartridge, FIG. 9(c) is a cross sectional view taken along line c-c in FIG. 9(b), and FIG. 9(d) is a cross-sectional view taken along line d-d in FIG. 9(b). FIG. 10 is an enlarged cross-sectional view showing a part of FIG. 9(c).

FIG. 11 is an enlarged cross-sectional view showing a part of FIG. 9(d). FIG. 12(a) is a perspective view of a transmitting member, FIG. 12(b) is also a perspective view as viewed from a different angle, FIG. 12(c) is a front view of the transmitting member, and FIG. 12(d) is a side view of the transmitting member. FIG. 13(a) is a perspective view of a receiving portion forming member, FIG. 13(b) is a side view of the receiving-portion forming member, and FIG. 13(c) is a front view of the receiving-portion forming member. FIG. 14 is an enlarged cross-sectional view showing a part of FIG. 4(b). FIG. 15(a) is a side view showing the transmitting member, the regulation member, an interlocking abutment portion, and so on in an unattached state, and FIG. 15(b) is a side view showing a state after a handling portion is pushed from the state shown in FIG. 15(a). FIG. 16(a) is a side view showing the transmitting member, the regulation member, the interlocking abutment portion, and the like in an attached state, and FIG. 16(b) is a side view showing a state after the handling portion is pushed from the state shown in FIG. 16(a).

DETAILED DESCRIPTION

[0013] The following will describe in detail the present invention based on embodiments with appropriate reference to the drawings.

[0014] Unless otherwise described, a radial direction in the present disclosure means the radial direction of a water purification cartridge that is attached to an appropriate position. Unless otherwise described, an axial

direction in the present disclosure means the axial direction of the water-purification cartridge attached to the appropriate position.

[0015] Unless otherwise described, an upstream side in the present disclosure means the upstream side of water

flow, and a downstream side in the present disclosure means the downstream side of water flow. The upstream side and

the downstream side of the water purification cartridge are determined based on the axial direction. Specifically, in the water purification cartridge, a front end side in the axial direction is the downstream side, and a rear end side in the axial direction is the upstream side. Unless

otherwise described, the downstream side is also referred to as a front side and the upstream side is also referred to as a rear side.

[0016] In the present disclosure, a state where the water purification cartridge is not attached to a cartridge

receiving portion is also referred to as an unattached state. Furthermore, a state where a water purification

cartridge PCl is attached to the cartridge receiving portion is also referred to as an attached state. The water purification cartridge PCl is attached to the appropriate position in the attached state.

[0017] [Findings constituting a basic idea of the

present disclosure] In the above-discussed type of faucet, a water purification cartridge is attached for a long period of time. As long as the water purification cartridge is attached, neither a regulation member nor a deregulation portion moves. The regulation member and the deregulation portion in the faucet disclosed in PCT/JP2018/000349 are kept still (in an immovable state) for a long period.

[0018] The regulation member, the deregulation portion,

and peripheral portions of those are likely to have adhesion of scale, dirt, or the like in such a lasting immovable state. The lasting immovable state is likely to cause adhesion between the regulation member and the deregulation portion as well as adhesion between the

regulation member and a support portion that supports the regulation member. Such adhesions can lead to malfunction.

[0019] The present disclosure has been achieved in view of the findings, and provides a configuration that prevents such malfunction.

[0020] [First Embodiment] FIG. 1 is a perspective view of a faucet device 2

according to a first embodiment. The faucet device 2 is installed to a kitchen sink (not shown in the figure). Portions which are not visually recognized, that is, portions located inside the kitchen sink, are omitted to show in FIG. 1. The faucet device 2 might be installed,

for example, to lavatories and bathrooms in addition to kitchens.

[0021] The faucet device 2 includes a body portion 4, a lever handle 6, and a water discharge head 8. The faucet device 2 is a so-called single-lever type faucet. The temperature of discharged water can be adjusted by side-to side pivot motion of the lever handle 6. The amount of

discharged water can be adjusted by up-down pivot motion of the lever handle 6. A valve mechanism capable of adjusting the temperature and amount of discharged water is accommodated inside the body portion 4. This valve mechanism is known.

[0022] Although not shown in drawings, a faucet apparatus including the faucet device 2 includes a hot water inlet tube and a water inlet tube. The hot-water inlet tube is connected to, for example, a tube extended

from a water heater. The water inlet tube is connected to, for example, a water supply tube without going through the water heater.

[0023] Heated water is brought into the hot-water inlet tube. The heating is performed by the water heater.

Unheated Water is brought into the water inlet tube. The valve mechanism adjusts the mixing ratio between hot water

and water. The temperature of discharged water can be adjusted by the mixing ratio. Hereinafter, heated water, unheated water, and a mixture of heated water and unheated water are also simply referred to as "water".

[0024] The water discharge head 8 includes a water inlet

portion 10, a switch portion 12, a handling portion 14, a water-shape adjusting portion 16, a display portion 20, and a discharge port 22. In the present embodiment, the handling portion 14 is a push button. The water inlet portion 10 also functions as a grip portion. In addition

to the push button, examples of the handling portion 14 include a lever and a dial. The handling portion formed by

a lever or a dial is known.

[0025] The water-shape adjusting portion 16 is configured to change the shape (water shape) of discharged water. The water-shape adjusting portion 16 includes a water-shape adjusting lever 18. Water shape can be changed

by handling the water-shape adjusting lever 18. The handling of the water-shape adjusting lever 18 enables the user to select one from among two or more kinds of water shapes. When the number of kinds of selectable water shapes is two, the two kinds of selectable water shapes are preferably a straight stream shape and a shower stream shape. When the number of kinds of selectable water shapes is three, the three kinds of selectable water shapes are preferably a straight stream shape and two different shower stream patterns that are a first shower stream shape and a second shower stream shape, which are adopted in the present embodiment. The shower stream patterns are differentiated by, for example, the scope of shower stream, the amount of shower stream, and the water pressure of shower stream.

[0026] The water discharge head 8 includes a raw water

flow path and a purified water flow path. When the raw water flow path is selected, raw water is discharged from the discharge port 22. Such a state in which raw water is discharged is also referred to as a raw water discharge state. When the purified water flow path is selected,

purified water is discharged from the discharge port 22. Such a state in which purified water is discharged is also referred to as a purified water discharge state.

[0027] The switch portion 12 includes a switching mechanism capable of switching between purified water

discharge and raw water discharge by handling the handling portion 14. The switching mechanism is detailed later.

[0028] FIG. 2 is a front view of the water discharge head 8. FIG. 3(a) and FIG. 3(b) are cross-sectional views of the water discharge head 8 in the unattached state. FIG. 4(a) and FIG. 4(b) are cross-sectional views of the water discharge head 8 in the attached state.

[0029] FIG. 3(a) is a cross-sectional view taken along line a-a in FIG. 3(b). FIG. 3(b) is a cross-sectional view taken along line b-b in FIG. 3(a). In FIG. 3(a) and FIG. 3(b), the handling portion 14 shown is situated at a projected position. FIG. 3(a) and FIG. 3(b) show the raw water discharge state. Although not shown in the drawings, even when the water purification cartridge PCl is attached, raw water is discharged as long as the handling portion 14 is situated at the projected position. The water purification cartridge PCl is usually attached also in the raw water discharge state.

[00301 FIG. 4(a) and FIG. 4(b) are cross-sectional views of the water discharge head 8. FIG. 4(a) is a cross sectional view taken along line a-a in FIG. 4(b). FIG.

4(b) is a cross-sectional view taken along line b-b in FIG. 4(a). In FIG. 4(a) and FIG. 4(b), the handling portion 14

is situated at a depressed position. FIG. 4(a) and FIG. 4(b) show the purified water discharge state.

[0031] The handling portion 14 functions as a switching button. The handling portion 14 is pushed to switch between the flow paths. Every time the handling portion 14

is pushed, switching between the raw water flow path and the purified water flow path is performed. In other words, every time the handling portion 14 is pushed, switching between the raw water discharge state and the purified water discharge state is performed. As described later,

the switching mechanism includes a thrust lock mechanism handled by an alternate action. This thrust lock enables

the handling portion 14 to function as a push button. Each push of this push button 14 achieves mutual transition between the projected position and the depressed position of the push button 14.

[0032] A position at which the handling portion 14 is

situated when raw water is discharged is also referred to as a raw water discharge position. In the present embodiment, the raw water discharge position is the projected position. A position at which the handling portion 14 is situated when purified water is discharged is also referred to as a purified water discharge position. In the present embodiment, the purified water discharge position is the depressed position.

[00331 In the present disclosure, a direction in which

the push button 14 is pushed is defined as a front-rear direction. The pushing moves the push button 14 rearward. The projected position is located on the front side with respect to the depressed position. The push button 14 is once pushed to a maximum depressed position for achieving

the mutual transition between the projected position and the depressed position. The maximum depressed position is

located on the rear side with respect to the depressed position. When the push button 14 situated at the projected position is pushed, the push button 14 stops at the depressed position after once being moved to the maximum depressed position. A switch working position is

set at or immediately before the maximum depressed position. When the push button 14 reaches the switch working position, switching is performed, and then the push button 14 is transitioned to the depressed position. The push button 14 stays at the depressed position even after

releasing the pushing of the push button 14. When the push button 14 situated at the depressed position is pushed, the

push button 14 stops at the projected position after once being moved to the maximum depressed position (switch working position). The push button 14 stays at the projected position even after releasing the pushing of the push button 14.

[0034] In the water discharge head 8, when the push button 14 is situated at the projected position, the raw water flow path is selected. In the water discharge head 8, when the push button 14 is situated at the projected position, raw water is discharged. Alternatively, when the push button 14 is situated at the projected position, purified water may be discharged. In the water discharge head 8, when the push button 14 is situated at the depressed position, the purified water flow path is selected. In the water discharge head 8, when the push button 14 is situated at the depressed position, purified water is discharged. Alternatively, when the push button 14 is situated at the depressed position, raw water may be discharged.

[00351 FIG. 5 is an exploded perspective view of the water discharge head 8.

[00361 As shown in FIG. 5, the water discharge head 8 includes the water purification cartridge PC1. The water purification cartridge PCl is disposed inside an outer cylinder portion 24. The above-described water inlet portion (grip portion) 10 includes the outer cylinder

portion 24 and the water purification cartridge PC1.

[0037] A raw water flow path WG is formed outside the water purification cartridge PCl (see FIG. 4(a)). A purified water flow path WJ is formed within the water purification cartridge PCl (see FIG. 4(a)). In the raw

water discharge state, raw water flows through the raw water flow path WG, then passes through a raw water flow

path WG within the switching mechanism, and then discharges from the discharge port 22. On the other hand, in the purified water discharge state, raw water is filtered to be purified water in the process of flowing into the water purification cartridge PCl from outside the water

purification cartridge PC1. The purified water flows through the purified water flow path WJ within the water purification cartridge PCl and a purified water flow path WJ within the switching mechanism, and then discharges from the discharge port 22.

[00381 With reference to FIG. 5 again, the water discharge head 8 includes a head body 28, an upper head cover 30, and a lower head cover 32.

[00391 The switch portion 12 of the water discharge head 8 includes a thrust lock mechanism 34. The thrust lock mechanism 34 is accommodated in the head body 28. The thrust lock mechanism 34 includes a first switch piece 36, a second switch piece 38, a switch ring 40, a switch shaft 42, a coil spring 44, a switch cover 46, and an 0-ring 48.

The switch shaft 42 includes pushrods 50 and 51, and a button holder 52. The switch cover 46 includes a rearward

bottom portion 56 and a slit 58. The switch ring 40 is fixed on the front side of the switch cover 46. The switch shaft 42 is guided by the slit 58 to move in the front-rear direction. The second switch piece 38 moves together with the switch shaft 42. The second switch piece 38 and the

switch shaft 42 move in the front-rear direction (move frontward and rearward) in conjunction with the pushing of the handling portion 14. The coil spring 44 biases the switch cover 46 and the switch shaft 42 toward respective directions so that the switch cover 46 and the switch shaft

42 go away from each other. The first switch piece 36 is rotated by each pushing of the button, thereby enabling the

button to be held at the two different positions.

[0040] The thrust lock mechanism 34 attains the alternate action. The above-mentioned JP3454756B2 also adopts a similar thrust lock mechanism as in the present embodiment. Generally, as what is called a thrust lock

mechanism handled by an alternate action, a heart-shaped cam mechanism, a rotating cam mechanism, and a ratchet cam mechanism are known. All these mechanisms are commonly known. For example, one of these mechanisms can be adopted as the thrust lock mechanism 34.

[0041] The water discharge head 8 includes a water-shape changing portion 70. The water-shape changing portion 70 includes the water-shape adjusting portion 16, the water shape adjusting lever 18, and the discharge port 22, which

are described above. The water-shape changing portion 70 further includes a valve-seat forming portion 80.

[0042] The switching mechanism of the water discharge head 8 includes the above-described handling portion 14, a first valve V1, and a second valve V2. The water discharge

state is switched by opening or closing the two valves.

[0043] The first valve V1 includes a valve seat 101a, a

first valve body 101b, a ball holder 101c, and an elastic body 101d. The first valve V1 is a ball valve. The first valve body 101b is a ball. The valve seat 101a is an opening edge of a circular hole. The valve seat 101a is formed on the valve-seat forming portion 80. The ball 101b

is held by the ball holder 101c. The ball 101b and the elastic body 101d are accommodated in the ball holder 101c. The ball holder 101c is opened downward. The elastic body 101d is disposed between an upper portion of the ball holder 101c and the ball 101b. The elastic body 101d is a

coil spring. The elastic body 101d always biases the ball 101b toward the valve seat 101a side.

[0044] The second valve V2 includes a valve seat 102a, a second valve body 102b, a ball holder 102c, and an elastic body 102d. The second valve V2 is a ball valve. The second valve body 102b is a ball. The valve seat 102a is an opening edge of a circular hole. The valve seat 102a is

formed on the valve-seat forming portion 80. The ball 102b is held by the ball holder 102c. The ball 102b and the elastic body 102d are accommodated in the ball holder 102c. The ball holder 102c is opened downward. The elastic body 102d is disposed between an upper portion of the ball holder 102c and the ball 102b. The elastic body 102d is a coil spring. The elastic body 102d always biases the ball 102b toward the valve seat 102a side.

[0045] The pushrod 50 of the switch shaft 42 has an end

portion that is connected to the ball holder 101c. The pushrod 51 of the switch shaft 42 has an end portion that is connected to the ball holder 102c. The ball holder 101c and the ball holder 102c move in the front-rear direction together with the switch shaft 42. The ball 101b moves in

the front-rear direction together with the ball holder 101c. The ball 102b moves in the front-rear direction

together with the ball holder 102c. The switch shaft 42 moves in the front-rear direction together with the handling portion 14.

[0046] The valve seat 101a and the valve seat 102a are arranged side by side in a direction that is substantially

perpendicular to the front-rear direction. However, front rear direction positions of those valve seats 101a and 102a are (slightly) different from each other. The valve seat 101a is located on the rear side with respect to the valve seat 102a.

[0047] When the handling portion 14 is situated at the projected position, the ball 102b is fitted into the valve

seat 102a to close the second valve V2. In this instance, the center of the ball 101b is located off the center of the valve seat 101a, and thus the first valve V1 is opened. In this state, raw water is discharged. The second valve V2 is a purified water cut-off valve that closes the

purified water flow path.

[0048] When the handling portion 14 is situated at the depressed position, the ball 101b is fitted into the valve seat 101a to close the first valve Vi. In this instance, the center of the ball 102b is located off the center of the valve seat 102a, and thus the second valve V2 is opened. In this state, purified water is discharged. The first valve V1 is a raw water cut-off valve that closes the raw water flow path.

[0049] The water discharge head 8 includes a regulation member RG1. The regulation member RG1 is disposed in the purified water flow path WJ. The regulation member RG1 is rotatably fixed. The regulation member RG1 prevents switching into the purified water discharge state when the

water purification cartridge PCl is not attached.

[0050] As shown in FIG. 3(b), the regulation member RG1

is in a first state Ji when the water purification cartridge PCi is not attached. As shown in FIG. 4 (b), the regulation member RG1 is in a second state J2 when the water purification cartridge PCi is attached. Mutual transition between the first state Ji and the second state J2 is attained by rotating the regulation member RG1. The posture of the regulation member RG1 in the first state Ji is different from the posture of the regulation member RG1 in the second state J2. The first state Ji is a first posture of the regulation member RG1. The second state J2

is a second posture of the regulation member RG1.

[0051] The water discharge head 8 includes a biasing

member 104. The biasing member 104 biases the regulation member RG1 so that the regulation member RG1 is in the first state Ji (described later). In the present embodiment, the biasing member 104 is a torsion spring (torsion coil spring). Thus, the regulation member RG1 is

biased so as to be in the first state Ji.

[0052] The ball holder 102c includes an interlocking abutment portion LCl. The interlocking abutment portion LC1 a stick-shaped portion. The interlocking abutment portion LC1 has a rear end that is a free end. The interlocking abutment portion LCl moves in conjunction with the motion of the handling portion 14. The interlocking abutment portion LCl moves in the front-rear direction in accordance with the handling of the handling portion 14.

The handling portion 14 cannot be moved when the interlocking abutment portion LCl is prevented from moving. The handling portion 14 cannot be operated when the interlocking abutment portion LCl is prevented from moving.

[00531 The water discharge head 8 includes a

transmitting member TR1. The transmitting member TR1 is configured to move in the front-rear direction. The

transmitting member TR1 is moved frontward when the water purification cartridge PCl is attached. This frontwardly moved transmitting member TR1 abuts on the regulation member RG1. This abutment transitions the state of the regulation member RG1 from the first state J1 to the second

state J2. The transmitting member TR1 transmits, to the regulation member RG1, the fact that the water purification cartridge PCl is attached (to the appropriate position).

[0054] The water discharge head 8 includes a receiving portion forming member 106. The receiving-portion forming

member 106 is opened rearward. The receiving-portion forming member 106 is connected to a connection terminal

portion (to be described later) of the water purification cartridge PCl in a watertight manner. The receiving portion forming member 106 includes a connection receiving portion (to be described later) that can be connected to the water purification cartridge PCl in a watertight

manner.

[00551 The water discharge head 8 includes a water pervious member 108. The water-pervious member 108 is disposed on the front side of a front end face of the water purification cartridge PC1. The water-pervious member 108 according to the present embodiment is a net. The net is a metal net (meshed metal net).

[00561 FIG. 6(a) is a perspective view of the regulation member RG1. FIG. 6(b) is a perspective view of the

regulation member RG1 as viewed from a different direction from that in FIG. 6(a). FIG. 6(c) is a side view of the regulation member RG1. FIG. 6(d) is a plan view of the regulation member RG1.

[0057] The regulation member RG1 includes a shaft portion 110, a deregulating abutment portion 112, and a switch regulating portion 114. The regulation member RG1

further includes a first-state retaining portion 116. The shaft portion 110 is a rotation axis of the regulation member RG1.

[00581 The deregulating abutment portion 112 is located on one side of the shaft portion 110, and the switch

regulating portion 114 is located on the other side of the shaft portion 110. The deregulating abutment portion 112 is an end portion of a projection portion that extends toward the one side from the shaft portion 110. The switch regulating portion 114 is an end portion of a projection

portion that extends toward the other side from the shaft portion 110. In the first state J1 (see FIG. 3(b)), the

deregulating abutment portion 112 is located on the upstream side (rear side) of the shaft portion 110, and the switch regulating portion 114 is located on the downstream side (front side) of the shaft portion 110.

[00591 FIG. 7(a) is a perspective view of the ball

holder 102c. The ball holder 102c includes a ball accommodating portion 130 and the above-described interlocking abutment portion LCl. The ball accommodating portion 130 is a cylindrical portion that is opened downward. The ball 102b is accommodated in the ball accommodating portion 130. The interlocking abutment portion LCl is a stick-shaped portion that is projected from the ball accommodating portion 130. The interlocking abutment portion LCl extends in the front-rear direction.

The interlocking abutment portion LCl has an end face 132. The end face 132 is the rear end face of the interlocking abutment portion LCl.

[00601 The ball holder 102c includes a connection portion 134. The connection portion 134 is connected to (a

rear end portion of) the pushrod 51 (see FIG. 5). The ball holder 101c also includes a connection portion that has the

same structure as that of the connection portion 134 and is connected to (a rear end portion of) the pushrod 50 (see FIG. 5).

[0061] FIG. 8 is a perspective view of the water purification cartridge PC1. FIG. 9(a) is a side view of

the water purification cartridge PC1, FIG. 9(b) is a front view of the water purification cartridge PC1, FIG. 9(c) is a cross-sectional view taken along line c-c in FIG. 9(b), and FIG. 9(d) is a cross-sectional view taken along line d d in FIG. 9(b).

[0062] The water purification cartridge PCl includes an intermediate portion 150, a connection terminal portion 152

disposed at a front end portion of the intermediate portion 150, and a rear forming portion 154 disposed at a rear end portion of the intermediate portion 150. The connection terminal portion 152 is coaxial with the intermediate portion 150. The rear forming portion 154 is coaxial with

the intermediate portion 150.

[00631 The connection terminal portion 152 is provided on the downstream side of the intermediate portion 150. The inside of the connection terminal portion 152 is an empty space. This empty space functions as the purified water flow path WJ. That is, the connection terminal portion 152 includes the purified water flow path WJ inside the connection terminal portion 152. The connection terminal portion 152 is made of a resin. The entirety of the connection terminal portion 152 is integrated. The connection terminal portion 152 is integrally formed as a single-piece member made of a resin. Alternatively, the connection terminal portion 152 may be formed by combining a plurality of separately formed members.

[0064] The intermediate portion 150 has a cylindrical shape. The intermediate portion 150 includes a permeable

portion 151 that allows water to pass through the permeable portion 151. The intermediate portion 150 has a filtering function. The intermediate portion 150 includes an empty space in the inside thereof. The empty space functions as the purified water flow path WJ. The intermediate portion

150 may include an outer filtering layer and an inner filtering layer, for example. A water purification material may be disposed between the outer filtering layer and the inner filtering layer. The principal component of the water purification material is activated carbon, for

example. For example, a nonwoven fabric is used for the outer filtering layer and the inner filtering layer. An

antibacterial ceramic may be adopted for the outer filtering layer and/or the inner filtering layer. An ion exchanger may be adopted for the outer filtering layer and/or the inner filtering layer. The outer filtering layer may be constituted by a plurality of layers. The

inner filtering layer may be constituted by a plurality of layers. Note that the intermediate portion 150 according to the present embodiment is one example of a water purification functional portion (a portion that performs the function of purifying water). The intermediate portion

150 does not have to have the filtering function. The intermediate portion 150 may be a cylindrical wall portion that is impervious to water.

[0065] The water purification cartridge PCl according to the present embodiment includes a purification material capable of removing chlorine. Examples of the purification material include activated carbon.

[0066] The rear forming portion 154 closes the rear side of the intermediate portion 150. Meanwhile, the connection terminal portion 152 is pervious to water. The inside empty space of the connection terminal portion 152 is the purified water flow path WJ. Purified water that is generated by passing through the intermediate portion 150 flows through the connection terminal portion 152 and then reaches the switch portion 12.

[0067] The rear forming portion 154 may alternatively be pervious to water. For example, raw water may flow into the inside of the intermediate portion 150 from a through hole provided on the rear forming portion 154 of the water purification cartridge PC1. In this case, the intermediate portion 150 may be a cylindrical wall portion that is impervious to water.

[0068] The connection terminal portion 152 includes a first cylinder portion 160. The connection terminal portion 152 further includes a second cylinder portion 162. The connection terminal portion 152 further includes a third cylinder portion 164. The connection terminal portion 152 also includes a holding cylinder portion 166. The first cylinder portion 160 is located on the downstream side of the second cylinder portion 162. The second cylinder portion 162 is located on the downstream side of the third cylinder portion 164. The third cylinder portion 164 is located on the downstream side of the holding cylinder portion 166. The second cylinder portion 162 is located between the first cylinder portion 160 and the third cylinder portion 164. The first cylinder portion 160 is coaxial with the second cylinder portion 162. The second cylinder portion 162 is coaxial with the third cylinder portion 164. The third cylinder portion 164 is coaxial with the holding cylinder portion 166. The first cylinder portion 160 has a center line that coincides with a center line zl of the water purification cartridge PC1.

The second cylinder portion 162 has a center line that coincides with the center line zl of the water purification

cartridge PC1. The third cylinder portion 164 has a center line that coincides with the center line zl of the water purification cartridge PC1. The holding cylinder portion 166 has a center line that coincides with the center line zl of the water purification cartridge PC1.

[00691 The connection terminal portion 152 includes a first annular packing s1 and a second annular packing s2. In the present embodiment, the first annular packing s1 is an 0-ring. In the present embodiment, the second annular packing s2 is an 0-ring.

[0070] The connection terminal portion 152 includes a maximum outer-diameter portion. In the present embodiment,

the maximum outer-diameter portion of the connection terminal portion 152 is the holding cylinder portion 166. The maximum outer-diameter portion (holding cylinder portion 166) covers a downstream-side end portion of the intermediate portion 150. The maximum outer-diameter

portion (holding cylinder portion 166) holds the downstream-side end portion of the intermediate portion 150.

[0071] The first cylinder portion 160 has an outer diameter smaller than that of the second cylinder portion

162. The outer diameter of the second cylinder portion 162 is smaller than that of the third cylinder portion 164. The outer diameter of the third cylinder portion 164 is smaller than that of the holding cylinder portion 166.

[0072] The connection terminal portion 152 includes the first annular packing s1 and the second annular packing s2. The first annular packing s1 is disposed on the first cylinder portion 160. The second annular packing s2 is disposed on the second cylinder portion 162.

[0073] FIG. 10 is an enlarged view showing a part of FIG. 9(c). FIG. 11 is an enlarged view showing a part of

FIG. 9(d).

[0074] The first cylinder portion 160 forms a downstream-side end portion of the connection terminal portion 152. The first cylinder portion 160 forms a downstream-side end portion of the water purification

cartridge PC1.

[0075] The first cylinder portion 160 forms the downstream-side end portion of the water purification cartridge PC1. The first cylinder portion 160 forms the downstream-side end portion of the connection terminal

portion 152.

[0076] The connection terminal portion 152 includes a

forefront portion 170. In the present embodiment, the first cylinder portion 160 is the forefront portion 170. The forefront portion 170 can be defined as a portion located on the front side with respect to a purified water outlet hole 240 (to be described later). The forefront

portion 170 includes a first groove 172. The first groove 172 is provided on an outer circumferential surface of the forefront portion 170 (first cylinder portion 160). The first groove 172 is a circumferential groove. The first groove 172 is formed between a front wall portion 173a and a rear wall portion 173b. The front wall portion 173a forms a front side surface of the first groove 172. The rear wall portion 173b forms a rear side surface of the first groove 172.

[0077] The first annular packing s1 is disposed on the forefront portion 170. The first annular packing s1 is disposed on the first groove 172.

[0078] The forefront portion 170 includes a forefront face 174. The forefront face 174 is the front end face of

the water purification cartridge PC1. The forefront face 174 is a front end face of the connection terminal portion

152. The forefront face 174 is a flat surface. The forefront face 174 extends in the radial direction. The forefront face 174 has an annular shape (see FIG. 9(b)). The forefront face 174 is provided wholly in the circumferential direction. The forefront face 174 has a center positioned on the center line zl of the water purification cartridge PC1. The forefront face 174 is not a deregulation portion DR1. The forefront portion 170 does not include the deregulation portion DR1. The deregulation portion DR1 is described later.

[0079] The forefront portion 170 is impervious to water. The forefront portion 170 has an inner surface that faces

the purified water flow path WJ. In the present embodiment, the inner surface of the forefront portion 170 includes an inner surface 194 to be described later. The forefront portion 170 has an outer surface that faces the raw water flow path WG. In the present embodiment, the

outer surface of the forefront portion 170 includes the forefront face 174 and a recess portion 176. The outer surface of the forefront portion 170 has the recess portion 176. The inner surface and the outer surface of the forefront portion 170 are partitioned off from each other by the first annular packing s1. That is, the water flow path in contact with the inner surface of the forefront portion and the water flow path in contact with the outer surface of the forefront portion are partitioned off from each other by the first annular packing s1. The forefront portion 170 has a center line that coincides with the center line zl of the water purification cartridge PC1. The forefront portion 170 is disposed so as to intersect the center line zl of the water purification cartridge PC1.

[00801 The recess portion 176 is opened toward the downstream side. The recess portion 176 is opened

frontward in the axial direction. The recess portion 176 is opened to the raw water flow path WG. The recess portion 176 is impervious to water. The recess portion 176 has a circular cross-sectional shape (see FIG. 9(b)). The forefront face 174 is disposed on the circumference

(outside in the radial direction) of the recess portion 176. The recess portion 176 forms an empty space inside the forefront portion 170. The empty space formed by the recess portion 176 has a cylindrical shape. The empty space formed by the recess portion 176 is located inside in

the radial direction of the first annular packing s1. The empty space formed by the recess portion 176 is located

inside in the radial direction of the first groove 172. The forefront face 174 has a center line that coincides with the center line zl of the water purification cartridge PC1.

[0081] As shown in FIG. 10 and FIG. 11, the recess

portion 176 includes a side surface 178 and a bottom surface 180. The side surface 178 is a circumferential surface. The side surface 178 is positioned inside in the radial direction of the first groove 172. The bottom surface 180 is a flat surface. The bottom surface 180 extends in the radial direction. The bottom surface 180 has a circular shape. The bottom surface 180 has a center positioned on the center line zl of the water purification cartridge PC1.

[0082] The empty space formed by the recess portion 176 is located inside in the radial direction of the first groove 172. The empty space formed by the recess portion 176 is located inside in the radial direction of a bottom surface 172a.

[0083] The forefront portion 170 includes a partitioning wall 190. The partitioning wall 190 is impervious to

water. The partitioning wall 190 is located on the upstream side with respect to the forefront face 174. The partitioning wall 190 extends in the radial direction. The partitioning wall 190 has a center line that coincides with the center line zl of the water purification cartridge PC1.

[0084] The partitioning wall 190 intersects the center line zl of the water purification cartridge PC1. In other words, the partitioning wall 190 is positioned so as to intersect the center line zl of the water purification cartridge PC1. In the present embodiment, the partitioning

wall 190 intersects the center line zl of the water purification cartridge PCl at the center of the

partitioning wall 190. The partitioning wall 190 may alternatively intersect, at a position other than the center, the center line zl of the water purification cartridge PC1. The partitioning wall 190 forms the bottom surface 180 of the recess portion 176. The bottom surface

180 is an outer surface 192 of the partitioning wall 190. Thus, the outer surface of the forefront portion 170 includes the recess portion 176 having the bottom surface 180 which is the outer surface 192 of the partitioning wall 190.

[00851 The partitioning wall 190 serves as a partition between the inside and outside of the water purification cartridge PC1. The outer surface 192 of the partitioning wall 190 constitutes an outer surface of the water

purification cartridge PC1. The outer surface 192 faces the raw water flow path WG. The inner surface 194 of the partitioning wall 190 constitutes an inner surface of the water purification cartridge PC1. The inner surface 194 faces the purified water flow path WJ.

[00861 The forefront portion 170 includes a front end closing outer surface 196. The front end closing outer

surface 196 forms a part of the outer surface of the forefront portion 170. The front end closing outer surface 196 is located on the downstream side with respect to the purified water outlet hole 240. The front end closing outer surface 196 includes the forefront face 174, the

bottom surface 180 of the recess portion 176 (the outer surface 192), and the side surface 178 of the recess portion 176. The front end closing outer surface 196 includes the recess portion 176. Alternatively, the front end closing outer surface 196 does not have to include the

recess portion 176. For example, the front end closing outer surface 196 may be a flat surface. The front end

closing outer surface 196 includes a surface (the outer surface 192) that extends in the radial direction. The front end closing outer surface 196 is positioned so as to intersect the center line zl of the water purification cartridge PC1. The front end closing outer surface 196 is

impervious to water. The front end closing outer surface 196 does not include the deregulation portion DR1 (to be described later).

[0087] The front end closing outer surface 196 faces the raw water flow path WG. What is located on the downstream side of the front end closing outer surface 196 is the raw water flow path WG. Meanwhile, what is located on the upstream side of the front end closing outer surface 196 is the purified water flow path WJ. What is located on the upstream side of the front end closing outer surface 196 is the inside of the water purification cartridge PC1.

[00881 The connection terminal portion 152 includes a coupling extension portion 200. The coupling extension portion 200 connects the first cylinder portion 160 and the

second cylinder portion 162. As shown in FIG. 9(b), a plurality of coupling extension portions 200 are arranged

at equal intervals in the circumferential direction. In the present embodiment, four coupling extension portions 200 are arranged at equal intervals in the circumferential direction. The coupling extension portions 200 extend inclinedly with respect to the center line zl of the water

purification cartridge PC1. The coupling extension portions 200 respectively extend inward in the radial direction as going further to the downstream side. The coupling extension portions 200 connect the downstream side of the second cylinder portion 162 and the upstream side of

the first cylinder portion 160.

[00891 The second cylinder portion 162 includes a second

groove 210. The second groove 210 is a circumferential groove. The second groove 210 is provided on an outer circumferential surface of the second cylinder portion 162. The second annular packing s2 is disposed on the second groove 210. The inside of the second cylinder portion 162

is an empty space. The inside of the second cylinder portion 162 is the purified water flow path WJ.

[00901 The second cylinder portion 162 includes a downstream-side end face 212. The downstream-side end face 212 is a flat surface. The downstream-side end face 212 extends in the radial direction. The downstream-side end face 212 has an annular shape. The downstream-side end face 212 is provided wholly in the circumferential direction.

[0091] The downstream-side end face 212 may have a first constitution in which the downstream-side end face 212 is entirely continuous in the circumferential direction with no gap. Alternatively, the downstream-side end face 212 may have a second constitution in which the downstream-side

end face 212 includes divided portions that are divided by the coupling extension portions 200 and are arranged in the

circumferential direction. Alternatively, the downstream side end face 212 may have a third constitution in which the downstream-side end face 212 includes: a portion continuously provided in the circumferential direction with no gap; and divided portions that are divided by the

coupling extension portions 200 and are arranged in the circumferential direction. In the present embodiment, the downstream-side end face 212 includes four divided portions 214 divided by the coupling extension portions 200 and arranged in the circumferential direction, that is, the

second constitution.

[0092] In both the second constitution and the third

constitution, the smaller the width of the coupling extension portions 200, the larger the area of the divided portions 214 which serve as the deregulation portion DR1. A larger area of the divided portions 214 attains a deregulation function improving effect, that is,

improvements in positioning accuracy, abutability, precision in positional relationship during abutment, and the like between the deregulation portion DR1 and a member (the transmitting member TR1 in the present embodiment) that abuts on the deregulation portion DR1 to play a part in the deregulation function. From this viewpoint, the width of each coupling extension portion 200 is preferably less than or equal to 5.0 mm, more preferably less than or equal to 3 mm, and still more preferably less than or equal to 2.5 mm. An excessively small width of the coupling extension portions 200 is likely to lead to deterioration in strength of the coupling extension portions 200. From this viewpoint, the width of each coupling extension portion 200 is preferably greater than or equal to 0.5 mm, more preferably greater than or equal to 1 mm, and still more preferably greater than or equal to 1.5 mm. The width of the coupling extension portion 200 is measured in a direction that is perpendicular to the extending direction of the coupling extension portion which extends radially. When the width of the coupling extension portion 200 varies, an average width is considered as the width of the coupling extension portion 200. In the present embodiment, the width of the coupling extension portions 200 is 2 mm.

[0093] A double-pointed arrow P in FIG. 11 shows a diameter of a set of the divided portions 214 (deregulation portion DR1) measured at the center position in the radial direction width of the divided portions 214. An excessively small diameter P is likely to lead to decrease in flow rate of purified water. From this viewpoint, the diameter P is preferably greater than or equal to 10 mm, more preferably greater than or equal to 12 mm, and still more preferably greater than or equal to 15 mm. An excessively large diameter P upsizes the water purification cartridge PCl and the water discharge head 8, which tends to lead to upsizing of the faucet. From this viewpoint, the diameter P is preferably less than or equal to 22 mm, more preferably less than or equal to 20 mm, and still more preferably less than or equal to 17 mm. In the present embodiment, the diameter P is 15 mm.

[0094] When the second or third constitution is adopted, the deregulation portion DR1 and the coupling extension portions 200 share an identical region in the radial direction. This configuration prevents the upsizing of the faucet resulting from upsizing of the water purification cartridge PCl and the water discharge head 8. From this viewpoint, it is preferred to adopt the second or third constitution.

[0095] Whether to select the second or third constitution should be determined in view of the strength of the deregulation portion DR1 and the necessity for the above-described deregulation function improving effect. The second constitution is preferably adopted when particularly higher priority is placed on prevention of the upsizing of the faucet resulting from upsizing of the water purification cartridge PCl and the water discharge head 8. The third constitution is preferably adopted when it is necessary to consider both the strength of the deregulation portion DR1 and the necessity for the deregulation function improving effect.

[0096] A double-pointed arrow Q1 in FIG. 11 shows the radial-direction width of the downstream-side end face 212 (deregulation portion DR1). When the radial-direction width Q1 is small, the deregulation function improving effect tends to be insufficient. From this viewpoint, the radial-direction width Q1 is preferably greater than or equal to 1.0 mm, more preferably greater than or equal to 2.0 mm, and particularly preferably greater than or equal to 2.5 mm. When the radial-direction width Q1 is excessively large, the water purification cartridge PCl and the water discharge head 8 tend to be upsized, which tends to result in an upsized faucet, or a narrowed purified water outlet hole 240. From this viewpoint, the radial direction width Q1 is preferably less than or equal to 6.0 mm, more preferably less than or equal to 5.0 mm, and particularly preferably less than or equal to 4.0 mm. When the second constitution is selected, the radial-direction width Q1 is a radial-direction width of the divided portion 214.

[0097] The third constitution includes: a continuous part in which the downstream-side end face 212 is continuously formed in the circumferential direction with no gap; and another part in which the divided portions formed by dividing the downstream-side end face 212 with the coupling extension portions 200 are arranged in the circumferential direction. When a ratio (Q2/Q1) of a radial-direction width Q2 of the continuous part to the radial-direction width Q1 is excessively small, the deregulation function improving effect tends to be insufficient. From this viewpoint, the ratio (Q2/Q1) is preferably greater than or equal to 0.2, more preferably greater than or equal to 0.4, and particularly preferably greater than or equal to 0.6. An excessively large ratio (Q2/Q1) tends to cause deterioration in strength of the coupling extension portions 200. From this viewpoint, the ratio (Q2/Q1) is preferably less than or equal to 0.9, more preferably less than or equal to 0.8, and particularly preferably less than or equal to 0.7.

[0098] The coupling extension portions 200 each have an extension-portion downstream surface 202. The extension portion downstream surface 202 is a downstream-side surface of the coupling extension portion 200. The extension portion downstream surface 202 has a structure 1 of extending inward in the radial direction as going further to the downstream side. When the connection terminal portion 152 of the water purification cartridge PCl is inserted to the connection receiving portion of the cartridge receiving portion and the extension-portion downstream surface 202 is brought into contact with a portion of a connection receiving portion 274, the structure 1 adjusts the position of the portion of the connection receiving portion 274 such that the center line of the connection terminal portion 152 coincides with the center line of the connection receiving portion, thereby attaining an advantageous effect 1 of preventing damage to the connection terminal portion 152 and portions of the connection receiving portion as well as improving ease of handling in insertion of the connection terminal portion 152 of the water purification cartridge PCl to the connection receiving portion.

[00991 On the other hand, the downstream-side end face 212 has a structure 2 that extends in the radial direction, in other words, that is a surface perpendicular to the axial direction. As to be described later, the water discharge head 8 includes the transmitting member TR1 pressed by the water purification cartridge PCl when the

connection terminal portion 152 of the water purification cartridge PCl is inserted to the connection receiving

portion 274. The downstream-side end face 212 is the deregulation portion DR1. This deregulation portion DR1 extends in the radial direction, in other words, is a surface perpendicular to the axial direction, thereby attaining an advantageous effect 2 that the pressed portion

is pressed accurately and/or preferably. The advantageous effect 2 is achieved by the deregulation portion DR1 extending in the radial direction.

[0100] The structures 1 and 2 can achieve both the advantageous effects 1 and 2 despite the fact that the structures 1 and 2 are disposed, within the connection terminal portion 152, in an identical region in the axial direction. Moreover, these structures are disposed in the identical axial-direction region of the connection terminal portion 152, thereby capable of achieving prevention of the upsizing of the water discharge head having a water purification function, the water purification cartridge, and the faucet device, as well as increase of a region on which the water purification functional portion is locatable.

[0101] The third cylinder portion 164 includes a

circumferential surface 220 and a stepped surface 222. The circumferential surface 220 is a cylindrical surface. The circumferential surface 220 has a center line that coincides with the center line zl of the water purification cartridge PC1. The stepped surface 222 is a flat surface.

The stepped surface 222 extends in the radial direction. The stepped surface 222 has an annular shape. The stepped surface 222 is provided wholly in the circumferential direction. The inside of the third cylinder portion 164 is the purified water flow path WJ.

[0102] The holding cylinder portion 166 includes a circumferential surface 230 and a stepped surface 232. The

circumferential surface 230 a cylindrical surface. The circumferential surface 230 has a center line that coincides with the center line zl of the water purification cartridge PC1. The stepped surface 232 is a flat surface. The stepped surface 232 extends in the radial direction.

The stepped surface 232 has an annular shape. The stepped surface 232 is provided wholly in the circumferential direction. The stepped surface 232 connects the upstream side of the circumferential surface 220 and the downstream side of the circumferential surface 230.

[0103] The connection terminal portion 152 includes the purified water outlet hole 240. Purified water generated by the water purification cartridge PCl is discharged from the purified water outlet hole 240 to the outside of the

water purification cartridge PC1. The first annular packing s1 is located on the downstream side with respect to the purified water outlet hole 240. The second annular packing s2 is located on the upstream side with respect to the purified water outlet hole 240. The purified water

outlet hole 240 is located between the first annular packing s1 and the second annular packing s2. The purified

water outlet hole 240 is located between the first cylinder portion 160 (forefront portion 170) and the second cylinder portion 162. The first cylinder portion 160 is located apart from the second cylinder portion 162 to form a gap that is the purified water outlet hole 240. The purified

water outlet hole 240 is formed each between the coupling extension portions 200 adjacent to each other in the circumferential direction.

[0104] A double-pointed arrow Gl in FIG. 11 shows an outer diameter of the first annular packing s1. The outer

diameter Gl is measured in a state where the first annular packing s1 is attached to the first groove 172 and the

water purification cartridge PCl is not attached to the water discharge head 8. In other words, the outer diameter Gl is measured in the state where the water purification cartridge PCl is present alone. A double-pointed arrow G2 in FIG. 11 shows an outer diameter of the second annular

packing s2. The outer diameter G2 is measured in a state where the second annular packing s2 is attached to the second groove 210 and the water purification cartridge PCl is not attached to the water discharge head 8. In other words, the outer diameter G2 is measured in the state where the water purification cartridge PCl is present alone. In a case where the diameter of the bottom surface of a groove is varied as in the bottom surface 172a of the first groove 172, the outer diameters G1 and G2 of the annular packings are measured in a state where each annular packing is located at a position where the outer diameter of the bottom surface of the groove is at the maximum. The outer diameter G1 of the first annular packing s1 is smaller than the outer diameter G2 of the second annular packing s2.

[0105] Setting the outer diameter G1 of the first annular packing s1 to be smaller than the outer diameter G2 of the second annular packing s2 increases the radial direction width and/or the area of the downstream-side end face 212 which is the deregulation portion DR1, thereby achieving a preferably functioning contact (interaction) between the deregulation portion DR1 and a cartridge abutment surface 254 of the transmitting member TR1 even if a manufacturing error in parts or aging change due to a period of time of use occurs.

[0106] When a difference (G2-G1) that is the value of a difference between the outer diameter G2 and the outer diameter G1 is excessively small, it is difficult to ensure a sufficient radial-direction width and/or a sufficient area of the downstream-side end face 212 which is the deregulation portion DR1. From this viewpoint, the difference (G2-G1) is preferably greater than or equal to 3 mm, more preferably greater than or equal to 4 mm, and still more preferably greater than or equal to 6 mm. An excessively large difference (G2-G1) upsizes the water purification cartridge PCl and the water discharge head 8, which tends to lead to upsizing of the faucet. From this

viewpoint, the difference (G2-G1) is preferably less than or equal to 15 mm, more preferably less than or equal to 12 mm, and still more preferably less than or equal to 10 mm. In the present embodiment, the difference (G2-G1) is 7.8 mm.

[0107] When a ratio (G2/G1) that is a ratio of the outer diameter G2 to the outer diameter G1 is excessively small, it is difficult to ensure a sufficient radial-direction width and/or a sufficient area of the downstream-side end face 212 which is the deregulation portion DR1. From this viewpoint, the ratio G2/G1 is preferably greater than or equal to 1.2, more preferably greater than or equal to 1.3, and still more preferably greater than or equal to 1.5. An excessively large ratio G2/G1 upsizes the water purification cartridge PCl and the water discharge head 8, which tends to lead to upsizing of the faucet. From this viewpoint, the ratio G2/G1 is preferably less than or equal to 2.5, more preferably less than or equal to 2.3, and still more preferably less than or equal to 1.9. In the present embodiment, the ratio G2/G1 is 1.7.

[0108] When the outer diameter G1 of the first annular packing s1 is excessively small, the strength of the front end portion of the water purification cartridge PCl tends to deteriorate and a degree of watertightness of the first annular packing s1 also tends to deteriorate. From this viewpoint, the outer diameter G1 is preferably greater than or equal to 7 mm, more preferably greater than or equal to 9 mm, and still more preferably greater than or equal to 10 mm. An excessively large outer diameter G1 upsizes the water purification cartridge PCl and the water discharge head 8, which tends to lead to upsizing of the faucet. From this viewpoint, the outer diameter Gi is preferably less than or equal to 18 mm, more preferably less than or equal to 15 mm, and still more preferably less than or equal to 13 mm. In the present embodiment, the outer diameter G1 is 11 mm.

[0109] When the outer diameter G2 of the second annular packing s2 is excessively small, the flow rate of purified water tends to be reduced. From this viewpoint, the outer diameter G2 is preferably greater than or equal to 12 mm, more preferably greater than or equal to 14 mm, and still more preferably greater than or equal to 16 mm. An excessively large outer diameter G2 upsizes the water purification cartridge PCl and the water discharge head 8, which tends to lead to upsizing of the faucet. From this viewpoint, the outer diameter G2 is preferably less than or equal to 25 mm, more preferably less than or equal to 23 mm, and still more preferably less than or equal to 21 mm. In the present embodiment, the outer diameter G2 is 18.8 mm.

[0110] FIG. 12(a) is a perspective view of the transmitting member TR1. FIG. 12 (b) is a perspective view of the transmitting member TR1 as viewed from a different angle from that in FIG. 12 (a). FIG. 12(c) is a front view of the transmitting member TR1 as viewed from the front side. FIG. 12(d) is a side view of the transmitting member TR1.

[0111] The transmitting member TR1 includes a base portion 250 and a rearward extending portion 252. The rearward extending portion 252 is connected to the base portion 250 and extends rearward. A plurality of (three) rearward extending portions 252 are provided. The plurality of (three) rearward extending portions 252 extend from respective different positions on the base portion 250. The plurality of (three) rearward extending portions 252 is dispersedly arranged in the circumferential direction. The rearward extending portions 252 each extend rearward from the base portion 250. The rearward extending portions 252 each have a rear end that is a free end.

[0112] In the present embodiment, the rearward extending portions 252 are leg portions 253. Each leg portion 253 has a long and thin shape and a small cross-sectional area.

In view of the flow rate of purified water, the cross sectional area of each leg portion 253 (each rearward extending portion 252) is preferably less than or equal to 15 mm 2 , more preferably less than or equal to 10 mm 2 , and particularly preferably less than or equal to 5 mm 2 . In

view of strength of the leg portions 253 (rearward extending portions 252), the cross-sectional area of each

leg portion 253 (each rearward extending portion 252) is preferably greater than or equal to 1 mm 2 , more preferably greater than or equal to 2 mm 2 , and particularly preferably greater than or equal to 3 mm 2 . In the present embodiment, the cross-sectional area of each leg portion 253 (each

rearward extending portion 252) is 3.8 mm 2 . The cross sectional area is measured in a cross section perpendicular to the center line zl of the water purification cartridge Pci.

[0113] The transmitting member TR1 includes the

cartridge abutment surface 254. The rearward extending portions 252 each have the cartridge abutment surface 254.

In the present embodiment, the cartridge abutment surface 254 is a rear end face of each rearward extending portion 252. As shown in FIG. 12(d), axial-direction positions of the plurality of (three) cartridge abutment surfaces 254 coincide with each other.

[0114] The base portion 250 has a guide hole 256. The guide hole 256 penetrates the base portion 250. The guide hole 256 is a through hole that extends in the axial direction.

[0115] The transmitting member TR1 includes a deregulating abutment surface 260. The deregulating abutment surface 260 is provided on the base portion 250. The base portion 250 has a front surface that includes the deregulating abutment surface 260.

[0116] FIG. 13(a) is a perspective view of the receiving-portion forming member 106. FIG. 13(b) is a side view of the receiving-portion forming member 106. FIG. 13(c) is a front view of the receiving-portion forming member 106 as viewed from the front side.

[0117] FIG. 14 is an enlarged view showing a part of FIG. 4 (b). FIG. 14 includes a cross-sectional view of the

receiving-portion forming member 106.

[0118] The receiving-portion forming member 106 is disposed inside the water discharge head 8. The receiving portion forming member 106 constitutes the connection receiving portion (to be detailed later). Configuration

relating to the receiving-portion forming member 106 is detailed below with reference to FIG. 13 and FIG. 14.

[0119] The water discharge head 8 includes a cartridge receiving portion 270. The cartridge receiving portion 270 includes: a cylindrical hollow portion 272 (see FIG. 3) in

which the intermediate portion of the water purification cartridge PCl is disposed; and the connection receiving

portion 274 (see FIG. 14). As shown in FIG. 3(a) and FIG. 3(b), the cylindrical hollow portion 272 is formed inside the outer cylinder portion 24. The connection receiving portion 274 is provided on the front side of the cylindrical hollow portion 272. In the present embodiment,

the receiving-portion forming member 106 includes the connection receiving portion 274.

[0120] As shown in FIG. 14, the connection receiving portion 274 includes a first receiving cylinder portion 276 and a second receiving cylinder portion 278. The first receiving cylinder portion 276 is located on the front side in the axial direction with respect to the second receiving cylinder portion 278. The first receiving cylinder portion 276 is located on the downstream side with respect to the second receiving cylinder portion 278. The first receiving cylinder portion 276 has an inner diameter smaller than that of the second receiving cylinder portion 278. The first receiving cylinder portion 276 has an outer diameter smaller than the inner diameter of the second receiving cylinder portion 278.

[0121] As shown in FIG. 14, the connection terminal

portion 152 of the water purification cartridge PCl is watertightly connected to the connection receiving portion 274. The watertightness is ensured by the first annular packing s1 and the second annular packing s2. The first cylinder portion 160 (forefront portion 170) of the

connection terminal portion 152 is inserted to inside the first receiving cylinder portion 276. The first annular packing s1 is in tight contact with an inner circumferential surface of the first receiving cylinder portion 276. The second cylinder portion 162 of the

connection terminal portion 152 is inserted to inside the second receiving cylinder portion 278. The second annular

packing s2 is in tight contact with an inner circumferential surface of the second receiving cylinder portion 278. The second receiving cylinder portion 278 has an end face 280 that abuts on the stepped surface 222. The position in the axial direction of the water purification

cartridge PCl is set by this abutment.

[0122] As shown in FIG. 13(a), the receiving-portion forming member 106 includes an exterior cylinder portion 106a. The exterior cylinder portion 106a includes a small diameter outer wall 106b and a large-diameter outer wall

106c. The large-diameter outer wall 106c constitutes the second receiving cylinder portion 278. The end face 280 of the second receiving cylinder portion 278 is formed by the rear end face of the receiving-portion forming member 106.

[0123] The connection receiving portion 274 includes a purified water passage WJ1 that forms a part of the purified water flow path WJ and is sectioned off from the raw water flow path WG to lead purified water discharged from the purified water outlet hole 240 so as not to flow

into the raw water flow path WG (see FIG. 14). A space between the first receiving cylinder portion 276 and the

second receiving cylinder portion 278 is the purified water passage WJ1. The connection receiving portion 274 further includes a raw water passage WG1 that forms a part of the raw water flow path WG and is sectioned off from the purified water passage WJ1 to lead raw water so as not to

flow into the purified water passage WJ1 (see FIG. 14). The connection receiving portion 274 includes a raw water passing opening 282 that functions as an inlet port and an outlet port of the raw water passage WG1 (see FIG. 13(a) and FIG. 13 (b)). Although not shown the drawings, the raw

water passing opening 282 is provided on each of the left side and the right side of the receiving-portion forming

member 106, that is, two raw water passing openings 282 are provided in total. The raw water passage WG1 extends from the first raw water passing opening 282 to the second raw water passing opening 282 to penetrate the receiving portion forming member 106. Raw water can flow through the

raw water passage WG1. The raw water passage WG1 constitutes the raw water flow path WG penetrating in the radial direction (left-right direction). The raw water passage WG1 leads raw water to the front end closing outer surface 196 of the water purification cartridge PC1. The raw water passage WG1 leads raw water to the forefront face 174 of the water purification cartridge PC1. The raw water passage WG1 leads raw water to the recess portion 176. The front end closing outer surface 196 faces the raw water flow path WG. The recess portion 176 faces the raw water flow path WG. The first annular packing s1 and the second annular packing s2 prevent purified water discharged from the purified water outlet hole 240 from flowing into the raw water flow path WG. The first annular packing s1 prevents water in the raw water passage WG1 from flowing into the purified water flow path WJ. The second annular packing s2 prevents water in the raw water flow path WG from flowing into the outlet of the purified water outlet hole 240. The second annular packing s2 prevents purified water discharged from the purified water outlet hole 240 from flowing into the raw water flow path WG.

[0124] The water-pervious member 108 is provided on the downstream side of the front end closing outer surface 196 (recess portion 176). The water-pervious member 108 is opposed to the forefront face 174. The water-pervious member 108 faces the raw water passage WG1. The water

pervious member 108 is disposed between the raw water passage WG1 and the front end closing outer surface 196.

The water-pervious member 108 is disposed between the raw water passage WG1 and the recess portion 176. The water pervious member 108 does not hamper water flow in the raw water flow path WG. Water flowing through the raw water passage WG1 can hit against the front end closing outer

surface 196. Water flowing through the raw water passage WG1 can flow into the recess portion 176. The water pervious member 108 is capable of preventing entry of foreign matter into the raw water passage WG1.

[0125] As shown in FIG. 13(c), the receiving-portion forming member 106 includes an interior cylinder portion 106d. The interior cylinder portion 106d forms the first receiving cylinder portion 276 (see FIG. 14). The above described purified water passage WJ1 is formed between the interior cylinder portion 106d and the exterior cylinder portion 106a.

[0126] As shown in FIG. 13(a) and FIG. 13(b), the water discharge head 8 (receiving-portion forming member 106) includes a regulation member support portion 106e. The

regulation member support portion 106e rotatably supports (the shaft portion 110 of) the regulation member RG1.

[0127] As shown in FIG. 13(a), FIG. 13(c), and FIG. 14, the water discharge head 8 (receiving-portion forming member 106) includes a slide protrusion 106f. The slide protrusion 106f extends in the axial direction. The slide protrusion 106f extends frontward. The slide protrusion

106f penetrates the guide hole 256 of the transmitting member TR1 (see FIG. 14 and FIG. 12).

[0128] As shown in FIG. 13(c), the water discharge head 8 (receiving-portion forming member 106) includes a gap 106g. The gap 106g is formed between the exterior cylinder

portion 106a and the interior cylinder portion 106d. The gap 106g forms a cylindrical empty space. The gap 106g is

form along the circumferential direction of the exterior cylinder portion 106a. The rearward extending portions 252 of the transmitting member TR1 are inserted to the gap 106g. All the plurality of (three) rearward extending portions 252 are inserted to the gap 106g. As a result,

the transmitting member TR1 holds the first receiving cylinder portion 276 (interior cylinder portion 106d) with the plurality of (three) rearward extending portions 252. The transmitting member TR1 is supported by the first receiving cylinder portion 276 (interior cylinder portion

106d) from inside so as to be movable in the front-rear

direction. The transmitting member TR1 is supported by the interior cylinder portion 106d and the exterior cylinder portion 106a so as to be movable in the front-rear

direction. Furthermore, as described above, the slide protrusion 106f is inserted to the guide hole 256. The guide hole 256 is slidable while being guided by the slide protrusion 106f. That is, the transmitting member TR1 is supported by the slide protrusion 106f so as to be movable

in the front-rear direction.

[0129] The gap 106g constitutes the purified water

passage WJ1. In other words, the gap 106g is the purified water flow path WJ. The transmitting member TR1 is disposed in the purified water flow path WJ. The transmitting member TR1 disposed in the purified water flow path WJ is capable of easily abutting on the regulation

member RG1 disposed in the purified water flow path WJ.

[0130] When the rearward extending portions 252 of the transmitting member TR1 are formed by the plurality of leg portions 253 or the like as in the present embodiment, spaces are formed between the rearward extending portions

252. The spaces function as the purified water flow path WJ and contribute to ensuring a sufficient flow rate of

purified water. That is, the transmitting member TR1 includes: the base portion 250 having the deregulating abutment surface 260; and the rearward extending portions 252 extending rearward from the base portion 250 and terminating at the cartridge abutment surfaces 254, and is

configured to form, between the rearward extending portions 252, spaces constituting a part of the purified water flow path WJ, thereby contributing to ensuring a sufficient flow rate of purified water.

[0131] FIG. 15(a) and FIG. 15(b) show the regulation member RG1, the transmitting member TR1, the interlocking abutment portion LC1, etc. in the state where the water purification cartridge PCl is not attached. The receiving portion forming member 106 is omitted to show in FIG. 15(a) and FIG. 15 (b). As shown in FIG. 15(a), the regulation member RG1 is in the first state J1 in the unattached state. As described above, the regulation member RG1 is biased by the biasing member 104 toward a rotation direction so as to be in the first state. The transmitting member TR1 is not pressed from rearward in the unattached state. The transmitting member TR1 is situated at a rear position P1 in the unattached state. Even if the transmitting member TR1 is located on the front side with respect to the rear position P1, the transmitting member TR1 is pressed to return to the rear position P1 by the regulation member RG1 biased by the biasing member 104 as long as the water purification cartridge PCl is not attached.

[0132] As shown in FIG. 15(b), when a user attempts to move the handling portion 14 from the projected position to the depressed position in the state where the regulation

member RG1 is in the first state J1, the interlocking abutment portion LC1 which moves in conjunction with the

motion of the handling portion 14 abuts on the regulation member RG1 in the first state J1. That is, the end face 132 of the interlocking abutment portion LC1 abuts on the switch regulating portion 114 of the regulation member RG1. This abutment prevents the handling portion 14 from

reaching the switch working position. As a result, handling of attempting to move the handling portion 14 to the depressed position is blocked. Even when the handling portion 14 is pressed, the handling portion 14 is prevented from reaching the depressed position. In this manner, the regulation member RG1 in the first state J1 prevents the switching mechanism from switching from the raw water discharge to the purified water discharge.

[0133] The water discharge head 8 includes a retaining

abutment portion 296 that abuts on the regulation member RG1 in the first state J1 (see FIG. 3(b)). In the present embodiment, the retaining abutment portion 296 is the slide protrusion 106f (see FIG. 13(a) and FIG. 13(c)). In the first state J1, the retaining abutment portion 296 abuts on

the first-state retaining portion 116 (see FIG. 6(c)) of the regulation member RG1. The abutment between the first

state retaining portion 116 and the retaining abutment portion 296 prevents rotation in a first direction of the regulation member RG1, which otherwise occurs when the switch regulating portion 114 is pressed by the interlocking abutment portion LCl. With reference to FIG.

3(b), the abutment between the first-state retaining portion 116 and the retaining abutment portion 296 prevents a clockwise rotation (rotation in the first direction) of the regulation member RG1, which otherwise occur when the switch regulating portion 114 is pressed by the

interlocking abutment portion LCl.

[0134] FIG. 16(a) and FIG. 16(b) show the regulation

member RG1, the transmitting member TR1, the interlocking abutment portion LC1, etc. in the state where the water purification cartridge PCl is attached. The receiving portion forming member 106 is omitted to show also in FIG. 16(a) and FIG. 16(b). As shown in FIG. 16(a), the

regulation member RG1 is in the second state J2 in the attached state. The water purification cartridge PCl attached to the appropriate position presses the transmitting member TR1 frontward. That is, the downstream-side end face 212 of the water purification cartridge PCl presses the cartridge abutment surfaces 254 of the transmitting member TR1. This pressing moves the transmitting member TR1 frontward. By this pressing, the transmitting member TR1 is moved to a front position P2 that is located on the front side with respect to the rear position Pl. The transmitting member TR1 moving to the front position P2 rotates the regulation member RG1. The deregulating abutment surface 260 of the transmitting member TR1 presses the deregulating abutment portion 112 of the regulation member RG1 to rotate the regulation member RG1. This rotation is a rotation in a second direction that is the reverse direction with respect to the first direction. The retaining abutment portion 296 does not hamper the regulation member RG1 in the first state J1 from rotating in the second direction. In this manner, the transmitting member TR1 moves to the front position P2, thereby transitioning the state of the regulation member RG1 into the second state J2. The transition from the first state J1 into the second state J2 is achieved by the rotation of the regulation member RG1 about the shaft portion 110. This rotation is performed while resisting the biasing force of the biasing member 104.

[0135] As shown in FIG. 16(b), when the regulation

member RG1 is in the second state J2, the handling portion 14 is permitted to move from the projected position to the depressed position. Even when the handling portion 14 reaches the switch working position, the regulation member RG1 does not interfere with the interlocking abutment

portion LCl. That is, the end face 132 of the interlocking abutment portion LC1 does not abut on the switch regulating portion 114 of the regulation member RG1. As a result, the handling portion 14 is permitted to move to the depressed position, whereby the purified water discharge state is achieved. In this manner, the regulation member RG1 in the second state J2 permits the switching mechanism to switch from the raw water discharge to the purified water discharge.

[0136] The switch regulating portion 114 of the regulation member RG1 is situated at a first position in the first state J1 and is situated at a second position in the second state J2. In the present embodiment, mutual transition between the first position and the second

position is attained by the rotation of the regulation member RG1. In the process of switching from the raw water

discharge to the purified water discharge performed by the switching mechanism, the switch regulating portion 114 situated at the first position abuts on the interlocking abutment portion LC1 which moves in conjunction with the motion of the switching mechanism (see FIG. 15(b)). The

switch regulating portion 114 situated at the second position does not abut on the interlocking abutment portion LC1 in the process of switching from the raw water discharge to the purified water discharge performed by the switching mechanism (see FIG. 16(b)).

[0137] The method for the transition between the first state J1 and the second state J2 is not limited to the

rotation of the regulation member RG1. The transition may be attained by, for example, moving (parallel moving), moving that involves rotation, or the like instead of the rotation. A change between the first state J1 and the second state J2 is not limited, and it is required only

that respective purposes of the first state J1 and the second state J2 are attained. That is, the first state J1 is only required to prevent the switching mechanism from switching from raw water discharge to purified water discharge, and the second state J2 is only required to permit the switching mechanism to switch from raw water discharge to purified water discharge.

[0138] The water purification cartridge PCl includes the deregulation portion DR1 which changes the state of the

regulation member from the first state J1 to the second state J2. In the present embodiment, the downstream-side end face 212 (divided portions 214) is the deregulation portion DR1 (see FIG. 8, FIG. 16(a), and FIG. 16(b)).

[0139] The deregulation portion DR1 is a surface that

faces frontward. The deregulation portion DR1 is shown in the front view (FIG. 9(b) of the water purification

cartridge PCl as viewed from the front side. The deregulation portion DR1 is located on the upstream side with respect to the first annular packing s1. The deregulation portion DR1 is located on the downstream side with respect to the second annular packing s2. The

deregulation portion DR1 is located between the first annular packing s1 and the second annular packing s2. The deregulation portion DR1 is disposed in the purified water flow path WJ. The deregulation portion DR1 faces the purified water flow path WJ.

[0140] The deregulation portion DR1 abuts on the transmitting member TR1. As shown in FIG. 16(a), when the

water purification cartridge PCl is attached to the appropriate position, the deregulation portion DR1 presses the transmitting member TR1 frontward. That is, the deregulation portion DR1 presses the cartridge abutment surfaces 254 of the transmitting member TR1. This pressing

moves the transmitting member TRi frontward. By this pressing, the transmitting member TRi is moved to the front position P2 located on the front side with respect to the rear position Pl. The transmitting member TRi moving to the front position P2 rotates the regulation member RG1.

The deregulating abutment surface 260 of the transmitting member TR1 presses the deregulating abutment portion 112 of the regulation member RG1 to rotate the regulation member RG1. The deregulation portion DR1 does not directly abut

on the regulation member RG1. The deregulation portion DR1 transitions, via the transmitting member TR1, the state of the regulation member RG1 into the second state J2.

[0141] The raw water cut-off valve V1 is closed when switching from the raw water discharge to the purified

water discharge is performed. At a moment when raw water flow is cut off by closing the raw water cut-off valve V1,

a water hammer or high water pressure occurs. This water hammer or high water pressure emanates from the vicinity of the raw water cut-off valve V1 and propagates toward the upstream side through the raw water flow path WG.

[0142] The same holds true for switching from the

purified water discharge to the raw water discharge. The purified water cut-off valve V2 is closed when switching from the purified water discharge to the raw water discharge is performed. At a moment when purified water flow is cut off by closing the purified water cut-off valve

V2, a water hammer or high water pressure occurs. This water hammer or high water pressure emanates from the

vicinity of the purified water cut-off valve V2 and propagates toward the upstream side through the purified water flow path WJ.

[0143] The water hammer or high water pressure reaches the downstream side of the forefront portion 170 of the

water purification cartridge PC1. The water hammer or high water pressure reaches the front end closing outer surface 196 and applies pressure to the front end closing outer surface 196. The water purification cartridge PCi sways (vibrates) by the pressure. Such swaying also vibrates the transmitting member TR1 and the regulation member RG1 which move in conjunction with the motion of the water purification cartridge PC1. These vibrations can prevent adhesion between the members.

[0144] If the regulation member RG1 is disposed in the raw water flow path WG, dirt or the like is adhered to the regulation member RG1, which is likely to cause malfunction. Similarly, if the deregulation portion DR1 is disposed in the raw water flow path WG, dirt or the like is

adhered to the deregulation portion DR1, which is likely to cause malfunction. Particularly in a case where a plumbing

pipe or the like is repaired after installation work of a faucet device in a kitchen or the like, the amount of dirt or the like contained in raw water is increased, which is likely to cause malfunction.

[0145] In the water discharge head 8, the regulation

member RG1 is disposed in the purified water flow path WJ. For this reason, the regulation member RG1 is less likely to have adhesion of dirt or the like. Dirt or the like is less likely to adhere to the deregulating abutment portion 112 and the switch regulating portion 114 of the regulation

member RG1. Dirt or the like is less likely to adhere to the shaft portion 110 of the regulation member RG1. The

regulation member support portion 106e (see FIG. 13(a)) which rotatably supports the shaft portion 110 is also disposed in the purified water passage WJ1 and is accordingly less likely to have adhesion of dirt or the like. Therefore, malfunction caused by the regulation

member RG1 is prevented.

[0146] In the water discharge head 8, the deregulation portion DR1 is disposed in the purified water flow path WJ. For this reason, the deregulation portion DR1 is less likely to have adhesion of dirt or the like. Therefore, malfunction caused by the deregulation portion DR1 is prevented.

[0147] In the water discharge head 8, the transmitting member TR1 is disposed in the purified water flow path WJ.

For this reason, the transmitting member TR1 is less likely to have adhesion of dirt or the like. Dirt or the like is less likely to adhere to the rearward extending portions 252, the cartridge abutment surfaces 254, the guide hole 256, and the deregulating abutment surface 260. Therefore,

malfunction caused by the transmitting member TR1 is prevented.

[0148] In the water discharge head 8, the interlocking abutment portion LC1 is disposed in the purified water flow path WJ. For this reason, the interlocking abutment portion LC1 is less likely to have adhesion of dirt or the like. Dirt or the like is less likely to adhere to the end

face 132 of the interlocking abutment portion LCl. Therefore, malfunction caused by the interlocking abutment portion LC1 is prevented.

[0149] In the water discharge head 8, portions that abut against each other to carry out the function of preventing

switching from the raw water discharge to the purified water discharge, and portions that abut against each other

to carry out the function of deregulating the prevention are disposed in the purified water flow path WJ. For this reason, malfunction regarding the prevention and the deregulation is prevented.

[0150] The regulation member RG1 is disposed on the

downstream side of the water purification cartridge PC1. Since the regulation member RG1 is disposed in the purified water flow path WJ, someone may attempt to also dispose the purified water flow path WJ on the downstream side of the water purification cartridge PC1. Doing so, however, reduces the vibration of the water purification cartridge PC1. Although a water hammer or high water pressure occurs both when the raw water cut-off valve V1 is closed and when the purified water cut-off valve V2 is closed as described above, a higher degree of water hammer or higher water pressure occurs when the raw water cut-off valve V1 is closed. That is, the degree of water hammer or water pressure is greater in the raw water flow path WG than in the purified water flow path WJ. The front end closing outer surface 196 provided to face the raw water flow path WG causes a higher degree of water hammer or higher water pressure, thereby facilitating vibration of the water purification cartridge PCi and the members which move in conjunction with the motion of the water purification cartridge PC1.

[0151] As described above, the recess portion 176 is

provided in the front end closing outer surface 196 (the outer surface of the forefront portion 170). The recess portion 176 can catch the water hammer or high water pressure more efficiently as compared with a flat surface or the like having no recess. The recess portion 176 is

capable of facilitating vibration of the water purification cartridge PCi and the members which move in conjunction

with the motion of the water purification cartridge PC1.

[0152] The raw water passage WG1 extends in the radial direction. The presence of the recess portion 176 attains an effective catching of water flow in the raw water passage WG1 extending in the radial direction. The recess

portion 176 can effectively catch a water hammer or high water pressure in the raw water passage WG1 extending in the radial direction. Therefore, vibration of the water purification cartridge PCi and the members which move in conjunction with the motion of the water purification cartridge PCl is facilitated.

[0153] In order to attain a structure in which the regulation member RG1 is disposed in the purified water flow path WJ and the front end closing outer surface 196

faces the raw water flow path WG, the water discharge head 8 includes the raw water passage WG1 which is disposed on the downstream side of the front end closing outer surface 196 and which faces the front end closing outer surface 196 (see FIG. 14). The purified water flow path WJ is provided

on the downstream side of the raw water passage WG1. The raw water passage WG1 and the purified water flow path WJ

located on the downstream side of the raw water passage WG1 are partitioned off from each other by a partition wall 290. The partition wall 290 is located on the downstream side of the raw water passage WG1. The purified water flow path WJ and the regulation member RG1 are disposed on the

downstream side of the partition wall 290. In the present embodiment, the partition wall 290 is formed by the receiving-portion forming member 106 (see FIG. 13(c)).

[0154] In this manner, the raw water flow path WG and the partition wall 290 are provided between the regulation

member RG1 and the water purification cartridge PC1. The regulation member RG1 is located away from the water

purification cartridge PC1. Because of the presence of the transmitting member TR1, the raw water flow path WG and the partition wall 290 can be provided between the water purification cartridge PCl and the regulation member RG1 disposed in the purified water flow path WJ. The base

portion 250 of the transmitting member TRi is located on the downstream side with respect to the raw water flow path WG and the partition wall 290. The cartridge abutment surfaces 254 of the transmitting member TRi are located on the upstream side with respect to the front end closing outer surface 196.

[0155] As shown in FIG. 14, the deregulation portion DR1 of the water purification cartridge PCl is located on the upstream side with respect to the front end closing outer

surface 196. The deregulation portion DR1 is situated at a position different the position of the front end closing outer surface 196, whereby the deregulation portion DR1 and the front end closing outer surface 196 can be disposed in respective flow paths different from each other.

[0156] The deregulation portion DR1 is disposed between the first annular packing s1 and the second annular packing

s2. The purified water outlet hole 240 is provided between the first annular packing s1 and the second annular packing s2. The first annular packing s1 and the second annular packing s2 each serve as a partition between the raw water flow path WG and the purified water flow path WJ.

Therefore, the deregulation portion DR1 can be disposed in the purified water flow path WJ while the front end closing outer surface 196 is disposed in the raw water flow path WG. Because of the presence of the deregulation portion DR1 in the purified water flow path WJ, it is facilitated

to provide the transmitting member TR1 and the regulation member RG1 in the purified water flow path WJ.

[0157] As shown in FIG. 11, the purified water outlet hole 240 includes an outlet opening edge 242. The outlet opening edge 242 includes a radially inner edge 242a and a radially outer edge 242b. The radially inner edge 242a and the radially outer edge 242b are disposed coaxially with

each other. The radially inner edge 242a has a circular shape. The radially outer edge 242b has a circular shape. The radially outer edge 242b is positioned outside in the radial direction with respect to the radially inner edge 242a. The radially outer edge 242b is positioned on the upstream side with respect to the radially inner edge 242a.

[0158] The deregulation portion DR1 is disposed adjacent to the purified water outlet hole 240 which connects the purified water flow path WJ provided inside the water

purification cartridge PCl and the purified water flow path WJ (purified water passage WJ1) provided in the connection receiving portion 274. The deregulation portion DR1 is a surface that extends outward in the radial direction from the radially outer edge 242b. As described above, the

deregulation portion DR1 is the downstream-side end face 212 (divided portions 214) and is an annular surface. The

deregulation portion DR1 which is the annular surface has a radially inner edge that forms the radially outer edge 242b of the outlet opening edge 242. This configuration enables the deregulation portion DR1 to be formed at an intermediate position on the upstream side with respect to

the front end closing outer surface 196 while ensuring a sufficient cross-sectional area of the purified water outlet hole 240.

[0159] As shown in FIG. 11, the connection terminal portion 152 includes the purified water outlet hole 240,

the first annular packing s1 located on the downstream side with respect to the purified water outlet hole 240, and the

second annular packing s2 located on the upstream side with respect to the purified water outlet hole 240. The outer diameter Gl of the first annular packing s1 is smaller than the outer diameter G2 of the second annular packing s2. Because of this configuration, it is facilitated to provide

the deregulation portion DR1 between the first annular packing s1 and the second annular packing s2. This configuration enables the deregulation portion DR1 to be formed while preventing the water purification cartridge PCl from becoming complicated in shape, from increasing in cost, and from decreasing in flow rate.

[0160] In the present embodiment, the deregulation

portion DR1 is constituted by the plurality of divided portions 214. The deregulation portion DR1 is distributed

to have a circular ring shape (see FIG. 9(b)). Meanwhile, the plurality of cartridge abutment surfaces 254 of the transmitting member TR1 are arranged in the circumferential direction. Therefore, even when the circumferential direction position (phase) of the water purification

cartridge PCl is changed, the cartridge abutment surfaces 254 can stably abut on the deregulation portion DR1.

[0161] The number of the rearward extending portions 252 is not limited. There may be provided one rearward extending portion 252 or two rearward extending portions 252. From the viewpoint of a stable abutment on the deregulation portion DR1, the number of the rearward

extending portions 252 is preferably greater than or equal to three. When the rearward extending portions 252 are disposed in the purified water flow path WJ, an excessively large number of the rearward extending portions 252 can cause reduction in flow rate of purified water. From this

viewpoint, the number of the rearward extending portions 252 is preferably less than or equal to 8, more preferably

less than or equal to 6, and still more preferably less than or equal to 4.

[0162] In the present embodiment, 0-rings are used as the annular packings s1 and s2. The O-ring has a circular cross-sectional shape. The annular packings do not have to

have a circular cross-sectional shape. Alternatively, 0 rings having an elliptical cross-sectional shape may be used as the annular packings, for example. The annular packings are not limited to such 0-rings. Furthermore, the cross-sectional shape of the annular packings is not limited. Examples of usable annular packing include a quadrilateral packing having a quadrilateral cross section, a U-packing having a U-shaped cross section, a V-packing having a V-shaped cross section, a Y-packing having a Y shaped cross section, and an X-packing having an X-shaped cross section. From the comprehensive viewpoint of ensuring sealability (watertightness) and preventing adhesion of the annular packings to the water purification cartridge and other surrounding members, the O-ring is preferably used, and the O-ring having a circular cross section is particularly preferably used as the annular packings.

[0163] Examples of the material of the regulation member RG1 include a resin or a metal. From the viewpoint of cost, when the material is a metal, the process for manufacturing the regulation member RG1 is preferably

sintering, casting, or forging. When the material is a resin, a thermoplastic resin that is easy to form is preferably adopted. From the viewpoint of formability, more preferable examples include a polyoxymethylene resin (POM), a polyphenylene sulfide resin (PPS), an

acrylonitrile butadiene styrene resin (ABS), and a polypropylene resin (PP). From the viewpoint of strength,

the polyphenylene sulfide resin (PPS) is particularly preferable.

[0164] Examples of the material of the transmitting member TR1 include a resin or a metal. From the viewpoint of cost, when the material is a metal, the process for

manufacturing the transmitting member TR1 is preferably sintering, casting, or forging. When the material is a resin, a thermoplastic resin that is easy to form is preferably adopted. From the viewpoint of formability, more preferable examples include a polyoxymethylene resin

(POM), a polyphenylene sulfide resin (PPS), an acrylonitrile butadiene styrene resin (ABS), and a polypropylene resin (PP). When a greater importance is put on slidability with respect to an adjacent member such as

the regulation member RG1, the polyoxymethylene resin (POM) is particularly preferable. When a greater importance is put on strength, the polyphenylene sulfide resin (PPS) is particularly preferable.

[0165] Examples of the material of the deregulation

portion DR1 of the water purification cartridge PCl include a resin and a metal. From the viewpoint of cost, when the

material is a metal, the process for manufacturing a member including the deregulation portion DR1 is preferably sintering, casting, or forging. When the material is a resin, a thermoplastic resin that is easy to form is preferably adopted. From the viewpoint of formability,

more preferable examples include a polyoxymethylene resin (POM), a polyphenylene sulfide resin (PPS), an acrylonitrile butadiene styrene resin (ABS), and a polypropylene resin (PP). From the viewpoints of formability and cost, the acrylonitrile butadiene styrene

resin (ABS) and the polypropylene resin (PP) are particularly preferable.

[0166] Examples of the material of the connection receiving portion 274 include a resin or a metal. From the viewpoint of cost, when the material is a metal, the process for manufacturing a member including the connection receiving portion 274 is preferably sintering, casting, or

forging. When the material is a resin, a thermoplastic resin that is easy to form is preferably adopted. From the viewpoint of formability, more preferable examples include a polyoxymethylene resin (POM), a polyphenylene sulfide resin (PPS), an acrylonitrile butadiene styrene resin (ABS), and a polypropylene resin (PP). From the viewpoints of formability and cost, the acrylonitrile butadiene styrene resin (ABS) and the polypropylene resin (PP) are particularly preferable.

[0167] The water purification cartridge PCl is replaced by a new one after each predetermined period of use, whereas the regulation member RG1 is not replaced. The regulation member RG1 repeatedly used for a long period of time preferably has a high rigidity and a high abrasion

resistance. From this viewpoint, the material of the regulation member RG1 has a longitudinal elastic modulus of

preferably greater than or equal to 3 GPa, more preferably greater than or equal to 5 GPa, and still more preferably greater than or equal to 10 GPa. Considering the above described preferable materials, the longitudinal elastic modulus of the material of the regulation member RG1 is

preferably less than or equal to 30 GPa, more preferably less than or equal to 20 GPa, and still more preferably less than or equal to 15 GPa. The longitudinal elastic modulus of the material of the regulation member RG1 is preferably greater than that of the material of the

deregulation portion DR1. The longitudinal elastic modulus of the material of the regulation member RG1 is preferably

greater than that of the material of the transmitting member TR1.

[0168] The water purification cartridge PCl is replaced by a new one after each predetermined period of use, whereas the transmitting member TR1 is not replaced. The

transmitting member TRi repeatedly used for a long period of time preferably has a high slidability as well as a high rigidity and a high abrasion resistance. In view of having a high rigidity and a high abrasion resistance, the longitudinal elastic modulus of the material of the transmitting member TR1 is preferably greater than or equal to 0.1 GPa, more preferably greater than or equal to 1.0 GPa, and still more preferably greater than or equal to 2.0 GPa. Considering the above-described preferable materials, the longitudinal elastic modulus of the material of the transmitting member TR1 is preferably less than or equal to 10 GPa, more preferably less than or equal to 7 GPa, and still more preferably less than or equal to 5 GPa. The longitudinal elastic modulus of the material of the transmitting member TR1 is preferably greater than that of the material of the deregulation portion DR1.

[0169] The water purification cartridge PCl is preferably configured such that the material of the deregulation portion DR1 has a longitudinal elastic modulus EM1 smaller than a longitudinal elastic modulus EM2 of the material of a counterpart portion on which the deregulation

portion DR1 abuts. This configuration prevents damage and/or abrasion of the counterpart portion (e.g. the transmitting member TR1) which is repeatedly used for a long period of time. From this viewpoint, a ratio (EM1/EM2) of the EM1 to the EM2 is preferably less than or

equal to 0.9, more preferably less than or equal to 0.8, and particularly preferably less than or equal to 0.7. An

excessively small ratio (EM1/EM2) tends to excessively reduces the strength and/or abrasion resistance of the water purification cartridge PC1. From this viewpoint, the ratio (EM1/EM2) is preferably greater than or equal to 0.2, more preferably greater than or equal to 0.4, and

particularly preferably greater than or equal to 0.5.

[0170] The longitudinal elastic modulus is obtained from a relation between tensile stress and the amount of strain. The longitudinal elastic modulus is a proportionality constant between the amount of strain and the stress within the range of elasticity, which is also referred to as a

Young's modulus. Longitudinal elastic moduli of typical

materials are described in many literatures and are known. If the literatures fail to provide an accurate value, the

longitudinal elastic modulus can be measured in conformity to ASTM D638. A test piece made of a material that is the same as the material of a member to be measured can be used in the measurement.

[0171] In the water purification cartridge PCl according

to the above-described embodiment, the intermediate portion 150 includes the permeable portion 151 which allows water

to pass through the permeable portion 151 from the outer circumferential surface of the water purification cartridge PCl to the inside of the water purification cartridge PC1. The configuration of the intermediate portion 150 is not limited to such an embodiment. Alternatively, for example,

the outer circumferential surface of the water purification cartridge PCl may be formed with a circumferential wall that is impervious to water, and a permeable portion may be provided inside the circumferential wall. In this case, the water purification cartridge PCl may permit water to

flow into inside the water purification cartridge PCl from the rear end of the water purification cartridge PC1. For

example, an inflow port may be provided on the upstream side end (the rear end) of the water purification cartridge PC1. The inflow port may be disposed on the rear forming portion 154. Water can flow into the water purification cartridge PCl from the inflow port, pass through the

permeable portion, and then reach the connection terminal portion 152.

[0172] In the above-described embodiments, the water purification functional portion is the permeable portion, and purified water is generated by allowing raw water to pass through the permeable portion. As described above, the permeable portion is one example of the water purification functional portion. Alternatively, purified water may be generated without passing through the permeable portion. For example, the water purification cartridge may include a metal material that releases metal ions having disinfectant, antibacterial, bactericidal, or bacterial growth inhibiting effect, whereby purified water can be generated.

[0173] Purified water in the present disclosure conceptually includes the following generated water (1) and

(2): (1) generated water obtained by removing a substance, ions and the like contained in water using an absorbent, a filter membrane or the like; (2) generated water obtained by adding metal

ions, electrons, a substance, or the like to water for the purpose of providing beneficial properties such as a disinfectant effect or the like achieved by adding metal ions.

[0174] Specifically, purified water in the present

disclosure conceptually includes water generated by the following function A and/or function B. In other words,

the water purification functional portion in the present disclosure conceptually includes a functional portion having the following function A and/or function B.

[0175] [Function A] The function A means one or more functions

selected from the group consisting of the following functions Al, A2, A3, A4, and A5. Al: A function of absorbing and removing a substance contained in water by using an adsorbent such as activated carbon.

A2: A function of filtering off a substance contained in water by using a filter material. Preferably, the filter material is a filter membrane such as a reverse osmosis membrane, an ultrafiltration membrane, a

microfiltration membrane, a nanofiltration membrane, a porous hollow fiber membrane, or the like, and the function of filtering off the substance contained in water is achieved by the filter membrane. A3: A function of trapping and removing metal

ions or the like contained in water with a use of an ion exchange resin or the like.

A4: A function of allowing a metal material to release metal ions having a disinfectant, antibacterial, bactericidal, and/or bacterial growth inhibiting effect. A5: A function of allowing a metal material to release metal ions and causing oxygen in water to acquire

electrons released together with the released metal ions, thereby generating active oxygen.

[0176] Examples of the substance to be removed from water for purification include chlorine, volatile organic compounds, agricultural chemicals, musty odor substances,

and heavy metals. Preferably, one or more substances selected from the group consisting of chlorine, volatile

organic compounds, agricultural chemicals, musty odor substances, and heavy metals are removed.

[0177] In the present disclosure, "chlorine" conceptually includes residual chlorine contained in tap water. In the residual chlorine, free residual chlorine

and combined residual chlorine are included. Examples of the free residual chlorine include hypochlorous acid and hypochlorite ions. Examples of the combined residual chlorine include monochloramine, dichloramine, and trichloramine. Such kinds of the residual chlorine can be generated by dissolving chlorine gas in water for the purpose of disinfection of the water.

[0178] Examples of the volatile organic compounds include chloroform, bromodichloromethane,

dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1,1,1-trichloroethane, and total trihalomethane. One or more substances selected from the group consisting of chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene,

trichloroethylene, 1,1,1-trichloroethane, and total trihalomethane are preferably removed.

[0179] Examples of the agricultural chemicals include 2 chloro-4,6-bis(ethylamino)-1,3,5-triazine. This 2-chloro 4,6-bis(ethylamino)-1,3,5-triazine is preferably removed.

[0180] Examples of the musty odor substances include 2 methylisoborneol, geosmin, and phenols. One or more

substances selected from the group consisting of 2 methylisoborneol, geosmin, and phenols are preferably removed.

[0181] Examples of the heavy metals include lead,

mercury, copper, arsenic, and cadmium. One or more substances selected from the group consisting of lead, mercury, copper, arsenic, and cadmium are preferably removed.

[0182] Examples of the metal ions in the function A4 include zinc ions and silver ions. One or more kinds of ions selected from the group consisting zinc ions and silver ions are preferably released.

[0183] Examples of bacteria in the function A4 include colon bacilli and staphylococci, as well as miscellaneous bacteria defined as (included in) general bacteria. It is preferable to achieve a disinfectant, antibacterial, bactericidal, or bacterial growth inhibiting action against one or more kinds of those bacteria.

[0184] The active oxygen in the function A5 can decompose organic substances such as bacteria. Examples of the bacteria include colon bacilli and staphylococci, as well as miscellaneous bacteria defined as (included in) general bacteria. One or more kinds of these bacteria are preferably decomposed.

[0185] From the viewpoint of effectively removing chlorine and harmful substances in addition to suppressing

manufacturing cost of the water purification cartridge, the water purification cartridge preferably has the function

Al. In addition to the function Al, the water purification cartridge may also have one or more functions selected from the group consisting of the functions A2, A3, A4 and A5.

[0186] [Function B] The function B is a function of purifying water

by using a filter material and/or a medium defined in "(vi) water purifiers" in Appended Table 2 (Regarding Article 2) in Miscellaneous Manufactured Goods Quality Labeling Regulation (Revision Date: March 30, 2017 / Effective Date: April 1, 2017). In other words, the water purification

cartridge preferably includes a water purification functional portion that purifies water by using the filter

material and/or the medium defined in "(vi) water purifiers" in Appended Table 2 (Regarding Article 2) in Miscellaneous Manufactured Goods Quality Labeling Regulation (Revision Date: March 30, 2017 / Effective Date: April 1, 2017).

[0187] The water purification functional portion having the function A and/or the function B may constitute a part of the purified water flow path, or alternatively, may be disposed in the purified water flow path, or further alternatively, may be disposed in a pool portion that communicates with the purified water flow path.

[0188] The water purification cartridge may be of an integrated type in which the water purification cartridge is integrated as a whole so as not to be disassembled, or

may be of a composite type in which the water purification cartridge is constituted by a plurality of members which can be disassembled.

[0189] The composite-type water purification cartridge, for example, may have a configuration that includes a

cartridge body portion and an adapter member including the deregulation portion. The adapter member may be

connectable to the cartridge body portion, or alternatively, may be unconnectable to the cartridge body portion. In other words, the adapter member may be attachable to the cartridge body portion, or alternatively, may be un-attachable to the cartridge body portion. When

the adapter member is attachable to the cartridge body portion, the adapter member may be detachably attached to the cartridge body portion, or alternatively, may be un detachably attached to the cartridge body portion.

[0190] The configuration of the adapter member and the

cartridge body portion is not limited. Examples of the configuration may include the following configurations B1

to B4. B1: A configuration in which the adapter member is attached to the cartridge body portion, and then these in the attached state are attached to the cartridge receiving portion.

B2: A configuration in which the adapter member is first attached to the cartridge receiving portion, and then the cartridge body portion is attached to the adapter member. B3: A configuration in which the adapter member is attached to a part of the cartridge receiving portion, and then the cartridge body portion is attached to another part of the cartridge receiving portion. B4: A configuration in which the adapter member is first attached to a part of the cartridge receiving portion, and then the cartridge body portion is attached to the adapter member and another part of the cartridge receiving portion.

[0191] In the above configurations B1 to B4, the adapter

member may be detachably attached to the cartridge receiving portion, or alternatively, may be un-detachably

attached to the cartridge receiving portion. However, when the adapter member is un-detachably attached to the cartridge receiving portion, the regulation member is kept in the second state. Therefore, the adapter member is preferably detachably attached to the cartridge receiving

portion.

[0192] The following clauses are disclosed regarding the above-described embodiments.

[Clause 1] A water discharge head having a water

purification function, the water discharge head including: a discharge port;

a raw water flow path; a purified water flow path; a switching mechanism capable of switching water discharge that is brought from the discharge port between raw water discharge and purified water discharge;

a regulation member capable of undergoing a mutual transition between a first state and a second state, the first state preventing the switching mechanism from switching from the raw water discharge to the purified water discharge, and the second state permitting the switching mechanism to switch from the raw water discharge to the purified water discharge; a water purification cartridge including a deregulation portion that transitions the regulation member from the first state to the second state, and a front end closing outer surface that is impervious to water; and a cartridge receiving portion, wherein when the water purification cartridge is not attached to the cartridge receiving portion, the regulation member is in the first state, when the water purification cartridge is attached to the cartridge receiving portion, the deregulation portion causes the regulation member to be in the second state, the front end closing outer surface faces the raw water flow path, and the regulation member is disposed in the purified water flow path.

[Clause 2] The water discharge head according to clause 1, further including a transmitting member capable of undergoing a mutual transition between a front position and a rear position, wherein the transmitting member is moved to the front position when the water purification cartridge is attached, and the transmitting member moved to the front position transitions the regulation member into the second state.

[Clause 3] The water discharge head according to clause 2, wherein the deregulation portion is located on an upstream side with respect to the front end closing outer surface, and when the water purification cartridge is attached, the deregulation portion presses the transmitting member so that the transmitting member is moved to the front position.

[Clause 4] The water discharge head according to clause 3, wherein the cartridge receiving portion includes a connection receiving portion, the water purification cartridge includes a connection terminal portion that is connected to the connection receiving portion, the connection terminal portion includes a purified water outlet hole, a first annular packing located on a downstream side with respect to the purified water outlet hole, and a second annular packing located on the upstream side with respect to the purified water outlet hole, the first annular packing has an outer diameter G1 smaller than an outer diameter G2 of the second annular packing, and the deregulation portion is located between the first annular packing and the second annular packing.

[Clause 5] The water discharge head according to any one of clauses 1 to 4, wherein a raw water passage that constitutes the raw water flow path is provided on a downstream side of the water purification cartridge, the front end closing outer surface faces the raw water passage, a partition wall is provided on the downstream side of the raw water passage, and the purified water flow path and the regulation member are disposed on the downstream side of the partition wall.

[Clause 6] A water purification cartridge that is attachable to a water discharge head having a water purification function, the water discharge head including: a discharge port; a switching mechanism capable of switching water discharge that is brought from the discharge port between raw water discharge and purified water discharge; a regulation member capable of undergoing a mutual transition between a first state and a second state, the first state preventing the switching mechanism from switching from the raw water discharge to the purified water discharge, and the second state permitting the switching mechanism to switch from the raw water discharge to the purified water discharge; a purified water flow path in which the regulation member is disposed; a raw water flow path; and a cartridge receiving portion, and the water purification cartridge including: a water purification functional portion; a deregulation portion that transitions the regulation member from the first state to the second state; and a front end closing outer surface that faces the raw water flow path and is impervious to water.

[Clause 7] raw water flow path and is impervious to water.

[Clause 7]

The water purification cartridge according to

clause 6, wherein

the water discharge head further includes a

transmitting member capable of undergoing a mutual

transition between a front position and a rear position,

the deregulation portion causes the transmitting

member to move to the front position when the water

purification cartridge is attached, and

the transmitting member moved to the front

position allows the regulation member to transition into

the second state.

[Clause 8]

A faucet device including the water discharge

head according to any one of clauses 1 to 5.

[0193] The present disclosure also provides other

inventions which are not included in the inventions recited

in claims (including independent claims). The modes, the

members, the configurations, and the like described in the

claims and the embodiments of the present disclosure are

recognized as inventions based on their respective

advantageous effects.

[0194] The modes, the members, and the configurations,

and the like, disclosed in the embodiments are individually

applicable to all the inventions disclosed in the present

disclosure, inclusive of the inventions recited in the

claims, even if failing to include all of the modes, the

members, and the configurations according to the

embodiments.

[0194a] Throughout this specification and the claims

which follow, unless the context requires otherwise, the

word "comprise", and variations such as "comprises" and

"comprising", will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

[0194b] The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.

LIST OF REFERENCE NUMERALS

[0195] 2 Faucet device 4 Body portion 6 Lever handle 8 Water discharge head 14 Handling portion 106 Receiving-portion forming member 106f Slide protrusion 112 Deregulating abutment portion of regulation member 114 Switch regulating portion of regulation member 116 First-state retaining portion of regulation member 132 End face of interlocking abutment portion 152 Connection terminal portion of water purification cartridge 170 Forefront portion of water purification cartridge 176 Recess portion 196 Front end closing outer surface 240 Purified water outlet hole 254 Cartridge abutment surface of transmitting member 260 Deregulating abutment surface of transmitting member 274 Connection receiving portion 290 Partition wall s1 First annular packing s2 Second annular packing RG1 Regulation member DR1 Deregulation portion TR1 Transmitting member LCl Interlocking abutment portion PCl Water purification cartridge Ji First state of regulation member J2 Second state of regulation member P1 Rear position (Transmitting member) P2 Front position (Transmitting member) WJ Purified water flow path WJ1 Purified water passage WG Raw water flow path WG1 Raw water passage

Claims (6)

THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:

1. A water discharge head having a water purification function, the water discharge head comprising: a discharge port; a raw water flow path; a purified water flow path; a switching mechanism capable of switching water discharge that is brought from the discharge port between raw water discharge and purified water discharge; a regulation member capable of undergoing a mutual transition between a first state and a second state, the first state preventing the switching mechanism from switching from the raw water discharge to the purified water discharge, and the second state permitting the switching mechanism to switch from the raw water discharge to the purified water discharge; a water purification cartridge including a deregulation portion that transitions the regulation member from the first state to the second state, and a front end closing outer surface that is impervious to water; and a cartridge receiving portion, wherein when the water purification cartridge is not attached to the cartridge receiving portion, the regulation member is in the first state, when the water purification cartridge is attached to the cartridge receiving portion, the deregulation portion causes the regulation member to be in the second state, the front end closing outer surface faces the raw water flow path, and the regulation member is disposed in the purified water flow path.

2. The water discharge head according to claim 1, further comprising a transmitting member capable of undergoing a mutual transition between a front position and a rear position, wherein the transmitting member is moved to the front position when the water purification cartridge is attached, and the transmitting member moved to the front position transitions the regulation member into the second state.

3. The water discharge head according to claim 2, wherein the deregulation portion is located on an upstream side with respect to the front end closing outer surface, and when the water purification cartridge is attached, the deregulation portion presses the transmitting member so that the transmitting member is moved to the front position.

4. The water discharge head according to claim 3, wherein the cartridge receiving portion includes a connection receiving portion, the water purification cartridge includes a connection terminal portion that is connected to the connection receiving portion, the connection terminal portion includes a purified water outlet hole, a first annular packing located on a downstream side with respect to the purified water outlet hole, and a second annular packing located on the upstream side with respect to the purified water outlet hole, the first annular packing has an outer diameter G1 smaller than an outer diameter G2 of the second annular packing, and the deregulation portion is located between the first annular packing and the second annular packing.

5. The water discharge head according to any one of claims 1 to 4, wherein a raw water passage that constitutes the raw water flow path is provided on a downstream side of the water purification cartridge, the front end closing outer surface faces the raw water passage, a partition wall is provided on the downstream side of the raw water passage, and the purified water flow path and the regulation member are disposed on the downstream side of the partition wall.

6. A faucet device comprising the water discharge head according to any one of claims 1 to 5.