CN113694611B

CN113694611B - Drainage head with water purification function, water purification filter element and faucet device

Info

Publication number: CN113694611B
Application number: CN202111007576.7A
Authority: CN
Inventors: 高城壽雄; 高城寿太朗; 白武史考
Original assignee: Longevity Holdings Ltd
Current assignee: Japan Gaocheng Co ltd
Priority date: 2018-01-10
Filing date: 2018-04-13
Publication date: 2022-10-04
Anticipated expiration: 2038-04-13
Also published as: JP6416452B1; JPWO2019138591A1; AU2022224708B2; CN113694611A; AU2022224708A1

Abstract

[ Objective ] to provide a water purification cartridge which prevents erroneous recognition with respect to drainage and is excellent in reliability. [ solution ] A drain head 8 includes: a regulation member RG1 that is switchable between a first state J1 and a second state J2 to prevent the switching mechanism from switching from raw water discharge to purified water discharge in the first state J1 and to allow the switching mechanism to switch from raw water discharge to purified water discharge in the second state J2; a release regulation portion DR1 that shifts the regulation member RG1 from the first state J1 to the second state J2; a water purification cartridge PC1 comprising a water impermeable front end closed outer surface 196; a water purification cartridge receiving section. The front-end closed outer surface 196 faces the raw water flow path WG. The regulation member RG1 is provided in the purified water flow path WJ.

Description

Drainage head with water purification function, water purification filter element and faucet device

The application is a divisional application of an invention patent application with the application number of 201880086172.1 and the name of 'a drainage head with water purification function, a water purification filter element and a faucet device' which is proposed on the 13.04.2018.

Technical Field

The invention relates to a drainage head with a water purification function, a water purification filter element and a faucet device.

Background

A drain head is known which includes 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 not passing through a water purification cartridge and a purified water flow path passing through the water purification cartridge.

This type of drain head or a faucet device equipped with the same includes a manipulation portion that can switch between raw water discharge and purified water discharge. Examples of the manipulation portion include a button, a lever, and a dial. Some faucet devices may further include a display portion showing whether the raw water discharge or the purified water discharge is selected.

The user can recognize whether the raw water discharge or the purified water discharge is selected by the manipulation, display, and the like thereof. The water purification cartridge may not be inserted into the faucet due to memory errors, etc. Even in this state, the user may misunderstand that the faucet is discharging purified water when using the faucet. In other words, although the raw water is actually discharged, the user may misunderstand that the purified water is discharged.

Reference list

Patent document

Patent document 1: JP3454756B2

Disclosure of Invention

Problems to be solved by the invention

With regard to the above-mentioned problems, the international patent application PCT/JP2018/000349 has been filed. The application discloses drainage head with water purification function, this drainage head includes: an outlet port; a switching mechanism capable of switching the water discharge from the discharge port between the raw water discharge and the purified water discharge; an adjustment member that is mutually switchable 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 allows the switching mechanism to switch from the raw water discharge to the purified water discharge; a water purification cartridge including a release regulating portion that switches the regulating member from the first state to the second state; a water purification cartridge receiving section. When the water purification cartridge is not attached to the cartridge receiving portion, the adjustment member is in the first state. When the water purification cartridge is attached to the cartridge receiving portion, the adjustment portion is released to place the adjustment member in the second state. In the drain head, when the water purification cartridge is not attached to the cartridge receiving portion, the regulation member is in the first state, thereby preventing switching from raw water discharge to purified water discharge. Therefore, erroneous recognition of drainage can be prevented.

The inventors of the present disclosure have found that there is room for further improvement in faucets comprising an adjustment member. An object of the present invention is to provide a drain head and a water purification cartridge which prevent erroneous recognition on drain water and obtain excellent reliability.

Solution to the problem

According to one aspect, a drain head having a water purification function includes: an outlet port; a raw water flow path; a purified water flow path; a switching mechanism capable of switching the water discharge from the discharge port between the raw water discharge and the purified water discharge; an adjustment member that is mutually switchable 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 allows the switching mechanism to switch from the raw water discharge to the purified water discharge; a water purification cartridge comprising a deregulated portion and a front end closed outer surface, the deregulated portion transitioning the regulating member from the first state to the second state, the front end closed outer surface being water impermeable; a cartridge receiving portion. When the water purification cartridge is not attached to the cartridge receiving portion, the adjustment member is in the first state. When the water purification cartridge is attached to the cartridge receiving portion, the adjustment portion is released to place the adjustment member in the second state. The front end closed outer surface faces the raw water flow path. The regulating member is disposed in the purified water flow path.

According to another aspect, a water purification cartridge attachable to a drain head having a water purification function, the drain head comprising: an outlet port; a switching mechanism capable of switching the water discharge from the discharge port between the raw water discharge and the purified water discharge; an adjustment member that is capable of being switched from a first state that prevents the switching mechanism from switching from raw water discharge to purified water discharge to a second state that allows the switching mechanism to switch from raw water discharge to purified water discharge; a purified water flow path in which an adjustment member is provided; a raw water flow path; a cartridge receiving portion. Water purification cartridge includes: a water purification function part; a release adjustment portion that switches the adjustment member from the first state to the second state; a front-end closed outer surface that is watertight and faces the raw water flow path.

According to yet another aspect, a faucet apparatus includes a drain head having a water purification function.

Advantageous effects of the invention

According to an aspect, erroneous recognition of drainage is prevented, and the reliability of an erroneous recognition preventing mechanism is improved.

Drawings

Fig. 1 is a perspective view of a faucet device according to a first embodiment.

Fig. 2 is a front view of a drain head included in the faucet assembly of fig. 1.

Fig. 3 (a) is a cross-sectional view of the head taken along the line a-a in fig. 3 (b), and fig. 3 (b) is a cross-sectional view of the head taken along the line b-b in fig. 3 (a).

Fig. 4 (a) is a cross-sectional view of the drainage head taken along the line a-a in fig. 4 (b), and fig. 4 (b) is a cross-sectional view of the drainage head taken along the line b-b in fig. 4 (a).

Fig. 5 is an exploded perspective view of the drain head of fig. 1.

Fig. 6 (a) is a perspective view of the adjustment member, fig. 6 (b) is also a perspective view from a different angle than fig. 6 (a), fig. 6 (c) is a side view of the adjustment member, and fig. 6 (d) is a plan view of the adjustment member.

Fig. 7 (a) is a perspective view of a ball retainer included in the purified water stop valve, fig. 7 (b) is also a perspective view seen from a different angle from fig. 7 (a), fig. 7 (c) is a side view of the ball retainer, and fig. 7 (d) is a plan view of the ball retainer.

Fig. 8 is a perspective view of a water purification cartridge.

Fig. 9 (a) is a side view of a 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 the transmission member, fig. 12 (b) is also a perspective view from a different angle, fig. 12 (c) is a front view of the transmission member, and fig. 12 (d) is a side view of the transmission member.

Fig. 13 (a) is a perspective view of the 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 transmission member, the regulation member, the interlocking abutment portion, and the like in an unattached state, and fig. 15 (b) is a side view showing a state after the manipulation portion is pressed from the state shown in fig. 15 (a).

Fig. 16 (a) is a side view showing the transmission member, the regulation member, the interlocking abutment portion, and the like in the attached state, and fig. 16 (b) is a side view showing a state after the manipulation portion is pressed from the state shown in fig. 16 (a).

Detailed Description

The present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings as appropriate.

Unless otherwise stated, the radial direction in the present disclosure refers to the radial direction of a water purification cartridge attached in place. Unless otherwise stated, the axial direction in the present disclosure refers to the axial direction of a water purification cartridge attached in place.

Unless otherwise stated, the upstream side in the present disclosure refers to the upstream side of the water flow, and the downstream side in the present disclosure refers to the downstream side of the water flow. The upstream and downstream sides of the water purification cartridge are determined based on the axial direction. Specifically, in the water purification cartridge, the front end side in the axial direction is the downstream side, and the rear end side in the axial direction is the upstream side. Unless otherwise noted, the downstream side is also referred to as the front side, and the upstream side is also referred to as the rear side.

In the present disclosure, a state in which the water purification cartridge is not attached to the cartridge receiving portion is also referred to as an unattached state. Further, the state in which the water purification cartridge PC1 is attached to the cartridge receiving portion is also referred to as an attached state. The water purification cartridge PC1 is attached in an attached state to a suitable position.

[ findings constituting the basic idea of the present disclosure ]

In the above type of faucet, the water purification cartridge is attached for a long time. The regulating member and the release regulating portion do not move as long as the water purification cartridge is attached. The regulating member and the release regulating portion in the faucet disclosed in PCT/JP2018/000349 remain stationary (in an immovable state) for a long time.

In such a permanent immovable state, the regulating member, the release regulating portion and the peripheral portion thereof may be adhered with scale, dirt, and the like. The permanent immovable state may cause adhesion between the regulation member and the release regulation portion, and adhesion between the regulation member and the support portion that supports the regulation member. Such sticking can lead to failure.

The present disclosure has been achieved in view of the findings, and provides a configuration to prevent such a malfunction.

[ first embodiment ]

Fig. 1 is a perspective view of a faucet device 2 according to a first embodiment. The faucet assembly 2 is mounted on a kitchen sink (not shown in the figures). A visually unrecognizable portion, i.e., a portion located inside the kitchen sink, is omitted in fig. 1. The faucet device 2 may be installed in, for example, a bathroom or a toilet, in addition to a kitchen.

The faucet assembly 2 includes a body portion 4, a lever handle 6 and a discharge head 8. The faucet device 2 is a so-called single-lever type faucet. The temperature of the discharged water can be adjusted by the left-right pivoting movement of the lever handle 6. The amount of discharged water can be adjusted by the up-and-down pivotal movement of the lever handle 6. A valve mechanism capable of adjusting the temperature and amount of discharged water is housed inside the body portion 4. Such valve mechanisms are known.

Although not shown in the drawings, the faucet apparatus including the faucet device 2 includes a hot water inlet pipe and a water inlet pipe. The hot water inlet pipe is connected to a pipe extending from the water heater, for example. The water inlet pipe is connected to a water supply pipe that does not pass through the water heater, for example.

Hot water is introduced into the hot water inlet pipe. Heated by a water heater. Non-heated water is introduced into the water inlet pipe. The valve mechanism adjusts the mixing ratio between the hot water and the water. The temperature of the discharged water can be adjusted by the mixing ratio. Hereinafter, hot water, non-hot water, and a mixture of hot water and non-hot water are also simply referred to as "water".

The water discharge head 8 includes a water inlet portion 10, a switching portion 12, a manipulation portion 14, a water shape adjusting portion 16, a display portion 20 and a discharge port 22. In the present embodiment, the manipulation portion 14 is a button. The water inlet portion 10 also serves as a gripping portion. Examples of the manipulation portion 14 include a lever and a dial, in addition to the button. A manipulation portion formed of a lever or a dial is known.

The water shape adjusting portion 16 is configured to change the shape of the discharged water (water shape). The water shape adjusting part 16 includes a water shape adjusting lever 18. The water shape can be changed by manipulating the water shape adjusting lever 18. Manipulation of the water shape adjustment lever 18 enables a user to select one of two or more water shapes. When the number of the kinds of the selectable water shapes is two, the two selectable water shapes are preferably a straight shape and a shower flow shape. When the number of the kinds of the selectable water shapes is three, the three selectable water shapes are preferably the straight shapes employed in the present embodiment and two different shower flow patterns, which are the first shower flow shape and the second shower flow shape. Shower flow patterns are distinguished by, for example, the extent of the shower flow, the amount of the shower flow, and the water pressure of the shower flow.

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 of discharging raw water is also referred to as a raw water discharge state. When the purified water flow path is selected, the purified water is discharged from the discharge port 22. This state of discharging purified water is also referred to as a purified water discharge state.

The switching part 12 includes a switching mechanism capable of switching between purified water discharge and raw water discharge by manipulating the manipulation part 14. The switching mechanism will be described later in detail.

Fig. 2 is a front view of the drain head 8. Fig. 3 (a) and 3 (b) are cross-sectional views of the drain head 8 in an unattached state. Fig. 4 (a) and 4 (b) are cross-sectional views of the drain head 8 in an attached state.

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 3 (b), the handling section 14 is shown in a protruding position. Fig. 3 (a) and 3 (b) show a raw water discharge state. Although not shown in the drawings, even when the water purification cartridge PC1 is attached, as long as the manipulation portion 14 is located at the protruding position, the raw water is discharged. A water purification cartridge PC1 is also attached in a raw water discharge state in general.

Fig. 4 (a) and 4 (b) are cross-sectional views of the drain 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 4 (b), the operating portion 14 is located at the depressed position. Fig. 4 (a) and 4 (b) show the purified water discharge state.

The manipulation portion 14 functions as a switch button. The manipulation portion 14 is pressed to switch between flow paths. Each time the manipulation part 14 is pressed, switching is performed between the raw water flow path and the purified water flow path. In other words, each time the manipulation portion 14 is pressed, switching is performed between the raw water discharge state and the purified water discharge state. As described later, the switching mechanism includes a thrust lock mechanism operated by an alternate action. This push lock enables the operating portion 14 to function as a push button. Each depression of the push button 14 effects a reciprocal transformation between the protruding position and the depressed position of the push button 14.

The position where the manipulation section 14 is located when discharging the raw water is also referred to as a raw water discharge position. In this embodiment, the raw water discharge position is a projected position. The position where the handling portion 14 is located 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 pressed-down position.

In the present disclosure, the direction in which the button 14 is pressed is defined as the front-rear direction. Pressing moves the button 14 backwards. The protruding position is located on the front side with respect to the pressed-down position. Once the push button 14 is pressed to the maximum depressed position, the mutual switching between the projected position and the depressed position is effected. The maximum depression position is located on the rear side with respect to the depression position. When the button 14 located at the protruding position is pressed, the button 14 stops at the depressed position once the button 14 is moved to the maximum depressed position. The switching operation position is set at or immediately before the maximum depression position. When the button 14 reaches the switching operation position, switching is performed, and then the button 14 is shifted to the depressed position. The button 14 is kept in the depressed position even after the depression of the release button 14. When the button 14 located at the depressed position is pressed, the button 14 stops at the protruding position after the button 14 is once moved to the maximum depressed position (switching operation position). The push button 14 is held in the protruding position even after the pressing of the release button 14.

In the drain head 8, when the push button 14 is located at the protruding position, the raw water flow path is selected. In the drain head 8, when the push button 14 is located at the protruding position, the raw water is drained. Alternatively, when the button 14 is in the protruding position, the purified water may be discharged. In the drain head 8, when the push button 14 is in the depressed position, the purified water flow path is selected. In the drain head 8, when the push button 14 is located at the depressed position, purified water is discharged. Alternatively, when the button 14 is in the depressed position, the raw water may be discharged.

Fig. 5 is an exploded perspective view of the drain head 8.

As shown in fig. 5, the drain head 8 includes a water purification cartridge PC1. The water purification cartridge PC1 is disposed inside the outer cylindrical portion 24. The above-mentioned water inlet portion (grip portion) 10 includes an outer cylindrical body portion 24 and a water purification cartridge PC1.

A raw water flow path WG is formed outside the water purification cartridge PC1 (see fig. 4 (a)). A purified water flow path WJ is formed in the water purification cartridge PC1 (see fig. 4 (a)). In the raw water discharge state, the raw water flows through the raw water flow path WG, then passes through the raw water flow path WG within the switching mechanism, and then is discharged from the discharge port 22. On the other hand, in the purified water discharge state, raw water is filtered into purified water in the process of flowing into the water purification cartridge PC1 from the outside of the water purification cartridge PC1. The purified water flows through the purified water flow path WJ in the water purification cartridge PC1 and the purified water flow path WJ in the switching mechanism, and is then discharged from the discharge port 22.

Referring again to fig. 5, the drain head 8 includes a head body 28, an upper head cover 30, and a lower head cover 32.

The switching portion 12 of the drainage head 8 includes a thrust lock mechanism 34. The thrust lock mechanism 34 is housed in the head body 28. The thrust lock mechanism 34 includes a first switch member 36, a second switch member 38, a switch ring 40, a switch shaft 42, a coil spring 44, a switch cover 46, and an O-ring 48. The switching shaft 42 includes push rods 50 and 51, and a button holder 52. The switch cover 46 includes a rear base portion 56 and a slit 58. The switching ring 40 is fixed to the front side of the switching cover 46. The switching shaft 42 moves in the front-rear direction under the guidance of the slit 58. The second switch 38 moves together with the switch shaft 42. The second switch piece 38 and the switch shaft 42 move in the front-rear direction (forward-backward movement) in conjunction with the pressing of the manipulation portion 14. The coil spring 44 biases the switching cover 46 and the switching shaft 42 toward the respective directions so that the switching cover 46 and the switching shaft 42 are away from each other. The first switch member 36 is rotated by pressing the button each time, thereby enabling the button to be held in two different positions.

The thrust lock mechanism 34 achieves an alternating action. The above JP3454756B2 also employs a thrust locking mechanism similar to that of the present embodiment. Conventionally, as a so-called thrust lock mechanism operated by an alternate action, a heart cam mechanism, a rotary cam mechanism, and a ratchet cam mechanism are known. All of these mechanisms are well known. For example, one of these mechanisms may be used as the thrust lock mechanism 34.

The drainage head 8 includes a water-shape changing portion 70. The water shape changing part 70 includes the water shape adjusting part 16, the water shape adjusting lever 18, and the discharge port 22 described above. The water shape changing part 70 further includes a valve seat forming part 80.

The switching mechanism of the drain head 8 includes the above-described operating portion 14, the first valve Vl, and the second valve V2. The drainage state is switched by opening or closing both valves.

The first valve V1 includes a valve seat 101a, a first valve body 101b, a ball retainer 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 101 c. The ball 101b and the elastic body 101d are accommodated in the ball holder 101 c. The ball retainer 101c is open downward. The elastic body 101d is disposed between the 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.

The second valve V2 includes a valve seat 102a, a second valve body 102b, a ball retainer 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 102 c. The ball 102b and the elastic body 102d are accommodated in the ball holder 102 c. The ball retainer 102c is open downward. The elastic body 102d is disposed between the 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.

The push rod 50 of the switching shaft 42 has an end portion connected to the ball holder 101 c. The push rod 51 of the switching shaft 42 has an end portion connected to the ball retainer 102 c. The ball holder 101c and the ball holder 102c move in the front-rear direction together with the switching shaft 42. The ball 101b moves in the front-rear direction together with the ball holder 101 c. The ball 102b moves in the front-rear direction together with the ball holder 102 c. The switching shaft 42 moves in the front-rear direction together with the operating portion 14.

The valve seat 101a and the valve seat 102a are arranged side by side in a direction substantially perpendicular to the front-rear direction. However, the front-rear direction positions of these

valve seats

101a,102a are (slightly) different from each other. The valve seat 101a is located on the rear side with respect to the valve seat 102 a.

When the operating portion 14 is located at the protruding position, the ball 102b is fitted in the valve seat 102a to close the second valve V2. In this case, the center of the ball 101b is located outside the center of the valve seat 101a, and thus the first valve V1 is opened. In this state, the raw water is discharged. The second valve V2 is a purified water shutoff valve that closes the purified water flow path.

When the operating portion 14 is located at the depressed position, the ball 101b is fitted in the valve seat 101a to close the first valve V1. In this case, the center of the ball 102b is located outside 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 stop valve that closes the raw water flow path.

The drainage head 8 comprises a regulating member RG1. The regulation member RG1 is provided in the purified water flow path WJ. The adjusting member RG1 is rotatably fixed. When water purification cartridge PC1 is not attached, regulation member RG1 prevents switching to the purified water discharge state.

As shown in fig. 3 (b), when water purification cartridge PC1 is not attached, regulation member RG1 is in first state J1. As shown in fig. 4 (b), when water purification cartridge PC1 is attached, regulation member RG1 is in second state J2. The mutual transition between the first state J1 and the second state J2 is achieved by rotating the adjusting member RG1. The posture of the regulation member RG1 in the first state J1 is different from the posture of the regulation member RG1 in the second state J2. The first state J1 is a first posture of the regulating member RG1. The second state J2 is the second posture of the adjusting member RG1.

The discharge head 8 includes a biasing member 104. The biasing member 104 biases the adjusting member RG1 such that the adjusting member RG1 is in a first state J1 (described later). In the present embodiment, the biasing member 104 is a torsion spring (torsion coil spring). Therefore, the regulating member RG1 is biased to be in the first state J1.

The ball retainer 102c includes an interlocking abutment portion LC1. The interlocking abutment portion LC1 is a bar-shaped portion. The interlocking abutment portion LC1 has a rear end which is a free end. The interlocking abutting portion LC1 moves in conjunction with the movement of the operating portion 14. The interlock abutment portion LC1 moves in the front-rear direction in accordance with the manipulation of the manipulation portion 14. When the interlocking abutting portion LC1 is prevented from moving, the operating portion 14 cannot move. When the interlocking abutting portion LC1 is prevented from moving, the operating portion 14 cannot be operated.

The discharge head 8 includes a transmission member TRl. The power transmission member TR1 is configured to move in the front-rear direction. When the water purification cartridge PC1 is attached, the transmission member TR1 moves forward. The forwardly moving transmission member TR1 abuts on the adjusting member RG1. This abutment switches the state of the regulating member RG1 from the first state J1 to the second state J2. The transmission member TR1 transmits the fact that the water purification cartridge PC1 is attached (to an appropriate position) to the regulation member RG1.

The drain 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 (described later) of the water purification cartridge PC1 in a watertight manner. The receiving portion forming member 106 includes a connection receiving portion (described later) connectable to the water purification cartridge PC1 in a watertight manner.

The drainage head 8 comprises a water permeable member 108. The water permeable member 108 is provided on the front side of the front end face of the water purification cartridge PC1. The water permeable member 108 according to this embodiment is a mesh. The mesh is a metal mesh (expanded metal).

Fig. 6 (a) is a perspective view of the regulation member RGl. Fig. 6 (b) is a perspective view of the regulating member RG1 viewed from a direction different from that of 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.

The adjusting member RG1 includes a shaft portion 110, a release adjustment abutting portion 112, and a switch adjusting portion 114. The adjusting member RG1 further includes a first state retaining portion 116. The shaft portion 110 is a rotation axis of the adjustment member RG1.

The release-adjustment abutment portion 112 is located on one side of the shaft portion 110, and the switching adjustment portion 114 is located on the other side of the shaft portion 110. The release-regulation abutment portion 112 is an end portion of a protruding portion that extends toward one side from the shaft portion 110. The switching regulation portion 114 is an end portion of a protruding portion extending from the shaft portion 110 toward the other side. 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 switching regulating portion 114 is located on the downstream side (front side) of the shaft portion 110.

Fig. 7 (a) is a perspective view of the ball retainer 102 c. The ball retainer 102c includes the ball receiving portion 130 and the aforementioned interlocking abutment LC1. The ball receiving portion 130 is a cylindrical portion that opens downward. The ball 102b is accommodated in the ball accommodation portion 130. The interlocking abutting portion LC1 is a rod-like portion protruding from the ball receiving portion 130. The interlock abutment portion LC1 extends in the front-rear direction. The interlock abutment portion LC1 has an end face 132. The end face 132 is a rear end face of the interlock abutment portion LC1.

The ball retainer 102c includes a connecting portion 134. The connecting portion 134 is connected to (a rear end portion of) the push rod 51 (see fig. 5). The ball holder 101c also includes a connecting portion having the same structure as the connecting portion 134 and connected to (the rear end portion of) the push rod 50 (see fig. 5).

Fig. 8 is a perspective view of the water purification cartridge PC1. Fig. 9 (a) is a side view of water purification cartridge PC1, fig. 9 (b) is a front view of 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).

Water purification cartridge PC1 comprises: a middle portion 150; a connection terminal portion 152 provided at a front end portion of the intermediate portion 150; a rear forming portion 154 provided at a rear end portion of the middle 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.

The connection terminal portion 152 is disposed on the downstream side of the intermediate portion 150. The inside of the connection terminal portion 152 is an empty space. This empty space serves as a 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 resin. The entire connection terminal portion 152 is integral. The connection terminal portion 152 is integrally formed as a one-piece member made of resin. Alternatively, the connection terminal portion 152 may be formed by combining a plurality of separately formed members.

The middle portion 150 has a cylindrical shape. The middle portion 150 includes a permeable portion 151 that allows water to pass through the permeable portion 151. The middle portion 150 has a filtering function. The middle portion 150 includes an empty space therein. The empty space serves as the purified water flow path WJ. For example, the middle portion 150 may include an outer filter layer and an inner filter layer. The water purification material may be disposed between the outer filter layer and the inner filter layer. For example, the main component of the water purification material is activated carbon. For example, nonwoven fabrics are used for the outer and inner filter layers. The outer and/or inner filter layers may be made of an antimicrobial ceramic. The outer filter layer and/or the inner filter layer may employ an ion exchanger. The outer filter layer may be composed of multiple layers. The inner filter layer may be composed of multiple layers. Note that the intermediate portion 150 according to the present embodiment is one example of a water purification function portion (a portion that performs a water purification function). The middle portion 150 does not necessarily have a filtering function. The intermediate portion 150 may be a water impermeable cylindrical wall portion.

The water purification cartridge PC1 according to the present embodiment includes a purification material capable of removing chlorine. Examples of purification materials include activated carbon.

The rear forming portion 154 closes the rear side of the middle portion 150. Meanwhile, the connection terminal portion 152 is permeable to water. An empty space inside the connection terminal portion 152 is the purified water flow path WJ. The purified water generated by passing through the intermediate portion 150 flows through the connection terminal portion 152 and then reaches the switching portion 12.

The post-forming portion 154 may alternatively be permeable to water. For example, the raw water may flow into the inside of the middle portion 150 from a through hole provided on the rear formation portion 154 of the water purification cartridge PC1. In this case, the intermediate portion 150 may be a water-impermeable cylindrical wall portion.

The connection terminal portion 152 includes a first cylindrical body portion 160. The connection terminal portion 152 further includes a second cylindrical portion 162. The connecting terminal portion 152 further includes a third cylinder portion 164. The connection terminal portion 152 also includes a retention cylinder portion 166. The first cylindrical portion 160 is located on the downstream side of the second cylindrical portion 162. The second cylindrical portion 162 is located on a downstream side of the third cylindrical portion 164. The third cylinder portion 164 is located on the downstream side of the holding cylinder portion 166. The second cylindrical portion 162 is located between the first cylindrical portion 160 and the third cylindrical portion 164. The first cylindrical portion 160 is coaxial with the second cylindrical portion 162. The second cylindrical portion 162 is coaxial with the third cylindrical portion 164. The third cylindrical portion 164 is coaxial with the retaining cylindrical portion 166. The first cylindrical portion 160 has a center line coincident with the center line z1 of the water purification cartridge PC1. The second cylindrical portion 162 has a center line coinciding with the center line z1 of the water purification cartridge PC1. The third cylindrical portion 164 has a center line coincident with the center line z1 of the water purification cartridge PC1. The holding cylinder portion 166 has a center line coinciding with the center line z1 of the water purification cartridge PC1.

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

The connection terminal portion 152 includes a maximum outer diameter portion. In the present embodiment, the largest outer diameter portion of the connection terminal portion 152 is the holding cylindrical body portion 166. The maximum outer diameter portion (the holding cylindrical portion 166) covers the downstream side end portion of the intermediate portion 150. The maximum outer diameter portion (holding cylindrical portion 166) holds the downstream side end portion of the intermediate portion 150.

First cylindrical portion 160 has an outer diameter that is less than the outer diameter of second cylindrical portion 162. The outer diameter of the second cylindrical portion 162 is smaller than the outer diameter of the third cylindrical portion 164. The third cylinder portion 164 has an outer diameter that is smaller than the outer diameter of the retaining cylinder portion 166.

The connection terminal portion 152 includes a first annular filler s1 and a second annular filler s2. The first annular packing s1 is provided on the first cylindrical portion 160. The second annular packing s2 is provided on the second cylindrical portion 162.

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).

The first cylindrical portion 160 forms a downstream side end portion of the connection terminal portion 152. The first cylindrical portion 160 forms a downstream side end portion of the water purification cartridge PC1.

The first cylindrical portion 160 forms a downstream side end portion of the water purification cartridge PC1. The first cylindrical portion 160 forms a downstream side end portion of the connection terminal portion 152.

The connection terminal portion 152 includes a foremost portion 170. In this embodiment, the first cylindrical portion 160 is the foremost portion 170. The foremost portion 170 may be defined as a portion located at a front side with respect to a purified water outlet hole 240 (to be described later). The foremost portion 170 includes a first recess 172. The first groove 172 is provided on the outer circumferential surface of the foremost portion 170 (the first cylindrical portion 160). The first groove 172 is a circumferential groove. The first groove 172 is formed between the front wall portion 173a and the rear wall portion 173 b. The front wall portion 173a forms a front side surface of the first recess 172. The rear wall portion 173b forms a rear side surface of the first groove 172.

The first annular packing s1 is provided on the foremost part 170. The first annular packing s1 is disposed on the first groove 172.

The foremost portion 170 includes a foremost face 174. The foremost face 174 is the front end face of the water purification cartridge PC1. The foremost face 174 is a front end face of the connection terminal portion 152. Foremost face 174 is a flat surface. The foremost face 174 extends in the radial direction. The foremost face 174 has a ring shape (see fig. 9 (b)). The foremost face 174 is disposed in the entire circumferential direction. The foremost face 174 has a center located on the center line z1 of the water purification cartridge PC1. The foremost face 174 is not the deregulated portion DR1. The foremost part 170 does not include the deregulating part DR1. The release regulating portion DR1 will be described later.

The foremost portion 170 is impermeable to water. The foremost part 170 has an inner surface facing the purified water flow path WJ. In the present embodiment, the inner surface of the foremost portion 170 includes an inner surface 194, which will be described later. The foremost part 170 has an outer surface facing the raw water flow path WG. In this embodiment, the outer surface of the foremost portion 170 includes a foremost face 174 and a recessed portion 176. The outer surface of the forwardmost portion 170 has a recessed portion 176. The inner and outer surfaces of the foremost part 170 are separated from each other by the first annular packing s 1. That is, the water flow path in contact with the inner surface of the foremost part and the water flow path in contact with the outer surface of the foremost part are separated from each other by the first annular packing s 1. The foremost portion 170 has a center line coinciding with the center line z1 of the water purification cartridge PC1. The foremost portion 170 is disposed to intersect with the center line z1 of the water purification cartridge PC1.

The concave portion 176 is open toward the downstream side. The concave portion 176 opens forward in the axial direction. The concave portion 176 is opened to the raw water flow path WG. The recessed portion 176 is impermeable to water. The concave portion 176 has a circular cross-sectional shape (see fig. 9 (b)). The foremost face 174 is disposed in the circumferential direction (radially outward) of the recessed portion 176. The concave portion 176 forms an empty space inside the foremost portion 170. The empty space formed by the concave portion 176 has a cylindrical shape. The empty space formed by the concave portion 176 is located inside in the radial direction of the first annular packing s 1. The empty space formed by the concave portion 176 is located inside in the radial direction of the first groove 172. The foremost face 174 has a centre line coinciding with the centre line z1 of the water purification cartridge PC1.

As shown in fig. 10 and 11, the recessed portion 176 includes side surfaces 178 and a bottom surface 180. The side surface 178 is a circumferential surface. The side surface 178 is located radially inward of the first recess 172. The bottom surface 180 is a flat surface. The bottom surface 180 extends in a radial direction. The bottom surface 180 has a circular shape. The bottom surface 180 has a center located on the center line z1 of the water purification cartridge PC1.

The empty space formed by the concave portion 176 is located radially inward of the first groove 172. The empty space formed by the concave portion 176 is located radially inward of the bottom surface 172 a.

The foremost portion 170 includes a partition wall 190. The partition wall 190 is impermeable to water. The partition wall 190 is located on the upstream side with respect to the foremost face 174. The partition wall 190 extends in the radial direction. The partition wall 190 has a center line coinciding with the center line z1 of the water purification cartridge PC1.

The partition wall 190 intersects the center line z1 of the water purification cartridge PC1. In other words, the partition wall 190 is positioned to intersect the center line z1 of the water purification cartridge PC1. In the present embodiment, the partition wall 190 intersects the center line z1 of the water purification cartridge PC1 at the center of the partition wall 190. Alternatively, the partition wall 190 may intersect the center line z1 of the water purification cartridge PC1 at a position other than the center. The partition wall 190 forms the bottom surface 180 of the recessed portion 176. The bottom surface 180 is the outer surface 192 of the partition wall 190. Thus, the outer surface of the forwardmost portion 170 includes a recessed portion 176 having a bottom surface 180, the bottom surface 180 being the outer surface 192 of the partition wall 190.

The partition wall 190 serves as a partition between the inside and the outside of the water purification cartridge PC1. The outer surface 192 of the partition wall 190 constitutes the 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 partition wall 190 constitutes the inner surface of the water purification cartridge PC1. The inner surface 194 faces the purified water flow path WJ.

The forwardmost portion 170 includes a forward closed outer surface 196. The front end closed outer surface 196 forms a portion of the outer surface of the forwardmost portion 170. The front end closed outer surface 196 is located on the downstream side with respect to the purified water outlet hole 240. The front end closure outer surface 196 includes the forwardmost face 174, the bottom surface 180 (outer surface 192) of the recessed portion 176 and the side surface 178 of the recessed portion 176. The front end closure outer surface 196 includes a recessed portion 176. Alternatively, the front end closure outer surface 196 need not include the recessed portion 176. For example, the front end closure outer surface 196 may be a flat surface. The leading end closed outer surface 196 includes a surface (outer surface 192) that extends in a radial direction. The front end closed outer surface 196 is positioned to intersect the center line z1 of the water purification cartridge PC1. The front end closed outer surface 196 is impervious to water. The front-end closed outer surface 196 does not include a relief portion DR1 (to be described later).

The front-end closed outer surface 196 faces the raw water flow path WG. Located on the downstream side of the front-end closed outer surface 196 is a raw water flow path WG. Meanwhile, located on the upstream side of the front-end closed outer surface 196 is a purified water flow path WJ. Located on the upstream side of the front end closed outer surface 196 is the interior of the water purification cartridge PC1.

The connection terminal portion 152 includes a coupling extension portion 200. The coupling extension 200 connects the first and second

cylindrical portions

160 and 162. As shown in fig. 9 (b), the plurality of coupling extensions 200 are arranged at equal intervals in the circumferential direction. In the present embodiment, four coupling extensions 200 are arranged at equal intervals in the circumferential direction. The coupling extension portion 200 extends obliquely with respect to the center line z1 of the water purification cartridge PC1. The coupling extensions 200 respectively extend inward in the radial direction further to the downstream side. The coupling extension portion 200 connects the downstream side of the second cylindrical portion 162 and the upstream side of the first cylindrical portion 160.

The second cylindrical body portion 162 includes a second recess 210. The second groove 210 is a circumferential groove. The second groove 210 is provided on the outer circumferential surface of the second cylindrical portion 162. A second annular packing s2 is disposed on the second groove 210. The inside of the second cylindrical portion 162 is an empty space. Inside the second cylindrical portion 162 is a purified water flow path WJ.

The second cylindrical portion 162 includes a downstream end surface 212. The downstream side end surface 212 is a flat surface. The downstream side end surface 212 extends in the radial direction. The downstream-side end surface 212 has an annular shape. The downstream-side end surface 212 is provided in the entire circumferential direction.

The downstream side end surface 212 may have a first configuration in which the downstream side end surface 212 is completely continuous without a gap in the circumferential direction. Alternatively, the downstream-side end surface 212 may have a second configuration in which the downstream-side end surface 212 includes a divided portion divided by the coupling extension portion 200 and arranged in the circumferential direction. Alternatively, the downstream side end face 212 may have a third configuration, wherein the downstream side end face 212 includes: a portion provided continuously in the circumferential direction without a gap; divided portions divided and arranged in the circumferential direction by the coupling extension portion 200. In the present embodiment, the downstream-side end surface 212 includes four divided portions 214 divided by the coupling extending portion 200 and arranged in the circumferential direction, i.e., the second configuration.

In the second configuration and the third configuration, the smaller the width of the coupling extending portion 200, the larger the area of the dividing portion 214 serving as the release regulating portion DR1. The larger area of the dividing portion 214 obtains the effect of improvement in the release adjustment function, that is, improvement in positioning accuracy, abuttability, positional relationship accuracy during abutment between the release adjustment portion DR1 and a member (in the present embodiment, the power transmission member TR 1) abutting on the release adjustment portion DR1 to function in the release adjustment function, or the like. From this viewpoint, the width of each coupling extension 200 is preferably less than or equal to 5.0mm, more preferably less than or equal to 3mm, and still more preferably less than or equal to 2.5mm. Too small a width of the coupling extension 200 may cause the strength of the coupling extension 200 to be degraded. From this viewpoint, the width of each coupling extension portion 200 is preferably greater than or equal to 0.5mm, more preferably greater than or equal to 1mm, and still more preferably greater than or equal to 1.5mm. The width of the coupling extension 200 is measured in a direction perpendicular to the extending direction of the radially extending coupling extension. When the width of the coupling extension portion 200 is varied, the average width is considered as the width of the coupling extension portion 200. In the present embodiment, the width of the coupling extension 200 is 2mm.

The double-ended arrow P in fig. 11 shows the diameter of a group of the divisional portions 214 (the release adjustment portions DR 1) measured at the central position in the radial direction width of the divisional portions 214. Too small a diameter P may result in a reduced flow rate of purified water. From this viewpoint, the diameter P is preferably greater than or equal to 10mm, more preferably greater than or equal to 12mm, and still more preferably greater than or equal to 15mm. An excessive diameter P increases the size of the water purification cartridge PC1 and the drain head 8, which results in an increase in the size of the faucet. From this viewpoint, the diameter P is preferably less than or equal to 22mm, more preferably less than or equal to 20mm, and still more preferably less than or equal to 17mm. In the present embodiment, the diameter P is 15mm.

When the second or third configuration is adopted, the release regulating portion DRl and the coupling extending portion 200 share the same area in the radial direction. This configuration prevents an increase in the size of the faucet due to an increase in the size of the water purification cartridge PC1 and the drain head 8. From this viewpoint, it is preferable to adopt the second or third configuration.

Whether to select the second configuration or the third configuration should be determined according to the strength of the deregulating part DR1 and the necessity of the above-described deregulating function improvement effect. When particular priority is given to preventing the water faucet from being increased in size due to the increase in size of the water purification cartridge PC1 and the drain head 8, the second configuration is preferably adopted. The third configuration is preferably adopted when the strength of the deregulating part DR1 and the necessity of the deregulating function improving effect have to be considered.

Double-ended arrow Q1 in fig. 11 shows the radial direction width of the downstream-side end surface 212 (the deregulating portion DR 1). When the radial direction width Q1 is small, the effect of releasing the adjustment function improvement tends to be insufficient. From this viewpoint, the radial direction width Q1 is preferably greater than or equal to 1.0mm, more preferably greater than or equal to 2.0mm, and particularly preferably greater than or equal to 2.5mm. When the width Q1 in the radial direction is excessively large, the water purification cartridge PC1 and the drain head 8 tend to increase in size, which tends to cause an increase in the size of the faucet or a narrowing of the purified water outlet hole 240. From this viewpoint, the radial direction width Q1 is preferably less than or equal to 6.0mm, more preferably less than or equal to 5.0mm, and particularly preferably less than or equal to 4.0mm. When the second configuration is selected, the radial direction width Q1 is the radial direction width of the dividing portion 214.

The third configuration includes: a continuous portion in which the downstream side end surface 212 is continuously formed without a gap in the circumferential direction; another portion in which a divided portion formed by dividing the downstream side end surface 212 with the coupling extension portion 200 is arranged in the circumferential direction. When the ratio (Q2/Q1) of the radial direction width Q2 of the continuous portion to the radial direction width Q1 is excessively small, the effect of releasing the adjustment function improvement 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) may cause deterioration in strength of the coupling extension 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.

The coupling extensions 200 each have an extension downstream surface 202. Extension downstream surface 202 is the downstream side surface of coupling extension 200. Further downstream, the extension downstream surface 202 has the structure 1 extending inward in the radial direction. When the connection terminal portion 152 of the water purification cartridge PC1 is inserted into the connection receiving portion of the cartridge receiving portion and the extension downstream surface 202 is brought into contact with a portion of the connection receiving portion 274, the structure 1 adjusts the position of the portion of the connection receiving portion 274 so that the center line of the connection terminal portion 152 coincides with the center line of the connection receiving portion, thereby obtaining advantageous effect 1 of preventing damage to the connection terminal portion 152 and some portions of the connection receiving portion and improving the ease of handling of inserting the connection terminal portion 152 of the water purification cartridge PC1 into the connection receiving portion.

On the other hand, the downstream-side end surface 212 has the structure 2 extending in the radial direction, in other words, a surface perpendicular to the axial direction. As will be described later, the drain head 8 includes a transmission member TR1 that is pressed by the water purification cartridge PC1 when the connection terminal portion 152 of the water purification cartridge PC1 is inserted into the connection receiving portion 274. The downstream side end surface 212 is a relief portion DR1. The release portion DR1 extends in a radial direction, in other words, a surface perpendicular to the axial direction, thereby obtaining an advantageous effect 2 of accurately and/or preferably pressing the pressing portion. The beneficial effect 2 is obtained by the relief portion DR1 extending in the radial direction.

Although the

structures

1 and 2 are provided in the same region in the axial direction within the connection terminal portion 152, the

structures

1 and 2 can achieve the

advantageous effects

1 and 2. Further, these structures are provided in the same axial direction region of the connection terminal portion 152, thereby making it possible to achieve prevention of a water discharge head having a water purification function, an increase in the size of the water purification cartridge and the faucet device, and an increase in the region where the water purification function portion can be located.

The third cylindrical 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 coinciding with the center line z1 of the water purification cartridge PC1. The step surface 222 is a flat surface. The step surface 222 extends in the radial direction. The step surface 222 has an annular shape. The step surface 222 is provided in the entire circumferential direction. Inside the third cylindrical portion 164 is a purified water flow path WJ.

Retaining cylinder portion 166 includes a circumferential surface 230 and a stepped surface 232. The circumferential surface 230 is a cylindrical surface. The circumferential surface 230 has a center line coinciding with the center line z1 of the water purification cartridge PC1. The step surface 232 is a flat surface. The step surface 232 extends in the radial direction. The step surface 232 has an annular shape. The step surface 232 is provided in the entire circumferential direction. Step surface 232 connects the upstream side of circumferential surface 220 and the downstream side of circumferential surface 230.

The connection terminal portion 152 includes a purified water outlet hole 240. The purified water generated by the water purification cartridge PC1 is discharged to the outside of the water purification cartridge PC1 from the purified water outlet hole 240. 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 (foremost portion 170) and the second cylinder portion 162. The first cylinder portion 160 is positioned apart from the second cylinder portion 162 to form a gap as the purified water outlet hole 240. The purified water outlet holes 240 are formed between the coupling extension parts 200 adjacent to each other in the circumferential direction, respectively.

The double-ended arrow G1 in fig. 11 shows the outer diameter of the first annular packing s 1. The outer diameter G1 is measured in a state where the first annular packing s1 is attached to the first groove 172 and the water purification cartridge PC1 is not attached to the drain head 8. In other words, the outer diameter G1 is measured in a state where only the water purification cartridge PC1 is present. Double-ended arrow G2 in fig. 11 indicates the outer diameter of the second annular filler 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 PC1 is not attached to the drain head 8. In other words, the outer diameter G2 is measured in a state where only the water purification cartridge PC1 is present. In the case where the diameter of the bottom surface of the groove is changed as in the bottom surface 172a of the first groove 172, the outer diameters G1 and G2 of the annular packing 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 maximum. The outer diameter G1 of the first annular packing s1 is smaller than the outer diameter G2 of the second annular packing s2.

Setting the outer diameter G1 of the first annular packing s1 smaller than the outer diameter G2 of the second annular packing s2 increases the radial direction width and/or area of the downstream-side end surface 212 as the relief portion DR1, so that even if a manufacturing error of parts or an aged change due to a period of use occurs, preferable functional contact (interaction) is achieved between the relief portion DR1 and the cartridge abutment surface 254 of the power transmission member TR1.

When the difference (G2-G1) as the difference between the outer diameter G2 and the outer diameter G1 is too small, it is difficult to secure a sufficient radial direction width and/or a sufficient area of the downstream-side end surface 212 as the release regulation portion DR1. From this viewpoint, the difference (G2-G1) is preferably greater than or equal to 3mm, more preferably greater than or equal to 4mm, and still more preferably greater than or equal to 6mm. An excessive difference (G2-G1) increases the size of the water purification cartridge PC1 and the drain head 8, which results in an increase in the size of the faucet. From this viewpoint, the difference (G2-G1) is preferably less than or equal to 15mm, more preferably less than or equal to 12mm, and still more preferably less than or equal to 10mm. In this example, the difference (G2-G1) was 7.8mm.

When the ratio (G2/G1) as the ratio of the outer diameter G2 to the outer diameter G1 is excessively small, it is difficult to secure a sufficient radial direction width and/or a sufficient area of the downstream side end face 212 as the release adjusting 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 excessive ratio G2/G1 increases the size of the water purification cartridge PC1 and the drain head 8, which results in an increase in the size 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 example, the ratio G2/G1 is 1.7.

When the outer diameter G1 of the first annular packing s1 is too small, the strength of the front end portion of the water purification cartridge PC1 tends to deteriorate, and the degree of water tightness of the first annular packing s1 also tends to deteriorate. From this viewpoint, the outer diameter G1 is preferably greater than or equal to 7mm, more preferably greater than or equal to 9mm, and still more preferably greater than or equal to 10mm. The excessively large outer diameter G1 increases the size of the water purification cartridge PC1 and the drain head 8, which results in an increase in the size of the faucet. From this viewpoint, the outer diameter G1 is preferably less than or equal to 18mm, more preferably less than or equal to 15mm, and still more preferably less than or equal to 13mm. In the present embodiment, the outer diameter G1 is 11mm.

When the outer diameter G2 of the second annular packing s2 is too small, the flow rate of purified water tends to decrease. From this viewpoint, the outer diameter G2 is preferably greater than or equal to 12mm, more preferably greater than or equal to 14mm, and still more preferably greater than or equal to 16mm. The excessively large outer diameter G2 increases the size of the water purification cartridge PC1 and the drain head 8, which results in an increase in the size of the faucet. From this viewpoint, the outer diameter G2 is preferably less than or equal to 25mm, more preferably less than or equal to 23mm, and still more preferably less than or equal to 21mm. In the present embodiment, the outer diameter G2 is 18.8mm.

Fig. 12 (a) is a perspective view of the transmission member TRl. Fig. 12 (b) is a perspective view of the power transmission member TR1 viewed from a different angle from fig. 12 (a). Fig. 12 (c) is a front view of the power transmitting member TR1 as viewed from the front side. Fig. 12 (d) is a side view of the power transmission member TR1.

Drive member TR1 includes a base portion 250 and a rearwardly extending portion 252. The rearward extension 252 is connected to the base portion 250 and extends rearward. A plurality (three) of the rearward extensions 252 are provided. A plurality (three) of rearwardly extending portions 252 extend from respective different locations on the base portion 250. A plurality of (three) rearwardly extending portions 252 are arranged dispersedly in the circumferential direction. The rearward extensions 252 each extend rearward from the base portion 250. The rearwardly extending portions 252 each have a rear end as a free end.

In this embodiment, the rearwardly extending portion 252 is a leg portion 253. Each leg portion 253 has an elongated shape and a small cross-sectional area. In view of the flow rate of the purified water, the cross-sectional area of each leg portion 253 (each rearwardly extending portion 252) is preferably less than or equal to 15mm ² More preferably less than or equal to 10mm ² Particularly preferably less than or equal to 5mm ² . In view of the strength of the leg portions 253 (rearward extending portions 252), the cross-sectional area of each leg portion 253 (rearward extending portions 252) is preferably greater than or equal to 1mm ² More preferably greater than or equal to 2mm ² Particularly preferably greater than or equal to 3mm ² . In the present embodiment, each foot portion 253 (each rearwardly extending portion 252) has a cross-sectional area of 3.8mm ² . The cross-sectional area is measured in a cross-section perpendicular to the center line z1 of the water purification cartridge PC1.

Drive member TR1 includes a cartridge abutment surface 254. The rearwardly extending portions 252 each have a cartridge abutment surface 254. In this embodiment, cartridge abutment surface 254 is a rear end face of each rearward extension 252. As shown in fig. 12 (d), the axial direction positions of the plurality of (three) cartridge abutment surfaces 254 coincide with each other.

The base portion 250 has a guide hole 256. A guide hole 256 passes through the base portion 250. The guide hole 256 is a through hole extending in the axial direction.

The transmission member TR1 includes a release adjustment abutment surface 260. A release adjustment abutment surface 260 is provided on the base portion 250. The base portion 250 has a front surface that includes a release abutment surface 260.

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 viewed from the front side.

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.

The receiving portion forming member 106 is provided inside the drain head 8. The receiving portion forming member 106 constitutes a connection receiving portion (which will be described in detail later). The configuration related to the receiving portion forming member 106 is described in detail below with reference to fig. 13 and 14.

The drain head 8 includes a cartridge receiving portion 270. The cartridge receiving portion 270 includes: a cylindrical hollow portion 272 (see fig. 3), in which cylindrical hollow portion 272 the middle portion of the water purification cartridge PC1 is disposed; the connection receiving portion 274 (see fig. 14). As shown in fig. 3 (a) and 3 (b), a cylindrical hollow portion 272 is formed inside the outer cylindrical portion 24. The connection receiving portion 274 is provided at 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.

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

As shown in fig. 14, the connection terminal portion 152 of the water purification cartridge PC1 is water-tightly connected to the connection receiving portion 274. Water tightness is ensured by the first annular packing s1 and the second annular packing s2. The first cylindrical portion 160 (the foremost portion 170) of the connection terminal portion 152 is inserted into the inside of the first receiving cylindrical portion 276. The first annular packing s1 is in close contact with the inner circumferential surface of the first receiving cylindrical portion 276. The second cylinder portion 162 of the connection terminal portion 152 is inserted inside the second receiving cylinder portion 278. The second annular packing s2 is in close contact with the inner circumferential surface of the second receiving cylindrical portion 278. The second receiving cylindrical 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 PC1 is set by this abutment.

As shown in fig. 13 (a), the receiving portion forming member 106 includes an outer cylinder portion 106a. The outer 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 cylindrical portion 278. The end face 280 of the second receiving cylindrical portion 278 is formed by the rear end face of the receiving portion forming member 106.

The connection receiving part 274 includes a purified water passage WJl forming a part of the purified water flow path WJ and spaced apart from the raw water flow path WG to guide the 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). The space between the first receiving cylindrical portion 276 and the second receiving cylindrical portion 278 is the purified water passage WJ1. The connection receiving part 274 further includes a raw water passage WG1 forming a part of the raw water flow path WG and spaced apart from the purified water passage WJ1 to guide the raw water not to flow into the purified water passage WJ1 (see fig. 14). The connection receiving portion 274 includes a raw water passing opening 282 serving as an inlet and an outlet of the raw water passage WG1 (see fig. 13 (a) and 13 (b)). Although not shown in the drawings, the raw water passage opening 282 is provided on each of the left and right sides of the receiving portion forming member 106, that is, a total of two raw water passage openings 282 are provided. The raw water passage WG1 extends from the first raw water passage opening 282 to the second raw water passage opening 282 to penetrate the receiving portion forming member 106. Raw water may flow through the raw water passage WG1. The raw water passage WG1 constitutes a raw water flow path WG penetrating in a radial direction (left-right direction). The raw water passage WG1 guides raw water to the front-end closed outer surface 196 of the water purification cartridge PC1. The raw water passage WG1 guides raw water to the foremost face 174 of the water purification cartridge PC1. The raw water passage WG1 guides raw water to the concave portion 176. The front-end closed outer surface 196 faces the raw water flow path WG. The concave portion 176 faces the raw water flow path WG. The first and second annular packing s1 and s2 prevent the 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 the water in the raw water passage WG1 from flowing into the purified water flow path WJ. The second annular packing s2 prevents the 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 blocks the purified water discharged from the purified water discharge port 240 from flowing into the raw water flow path WG.

The water permeable member 108 is disposed on the downstream side of the front end closed outer surface 196 (the concave portion 176). The water permeable member 108 is opposite the foremost face 174. The water permeable member 108 faces the raw water passage WG1. The water permeable member 108 is disposed between the raw water passage WG1 and the front-end closed outer surface 196. The water permeable member 108 is disposed between the raw water passage WG1 and the concave portion 176. The water permeable member 108 does not obstruct the flow of water in the raw water flow path WG. The water flowing through the raw water passage WG1 may collide against the front-end closed outer surface 196. The water flowing through the raw water passage WG1 may flow into the recessed portion 176. The water permeable member 108 can prevent foreign matters from entering the raw water passage WG1.

As shown in fig. 13 (c), the receiving portion forming member 106 includes an inner cylindrical portion 106d. The inner cylindrical portion 106d forms a first receiving cylindrical portion 276 (see fig. 14). The purified water passage WJ1 described above is formed between the inner cylinder portion 106d and the outer cylinder portion 106a.

As shown in fig. 13 (a) and 13 (b), the drainage head 8 (receiving portion forming member 106) includes an adjustment member support portion 106e. The adjusting member supporting portion 106e rotatably supports (the shaft portion 110 of) the adjusting member RG1.

As shown in fig. 13 (a), 13 (c) and 14, the drain head 8 (receiving portion forming member 106) includes a sliding protrusion 106f. The slide projection 106f extends in the axial direction. The slide projection 106f extends forward. The slide projection 106f penetrates the guide hole 256 of the transmission member TR1 (see fig. 14 and 12).

As shown in fig. 13 (c), the drainage head 8 (receiving portion forming member 106) includes a gap 106g. A gap 106g is formed between the outer cylinder portion 106a and the inner cylinder portion 106d. The gap 106g forms a cylindrical empty space. The gap 106g is formed along the circumferential direction of the outer cylinder portion 106a. The rearward extension 252 of the drive member TR1 is inserted into the gap 106g. The plurality (three) of rearward extensions 252 are all inserted into the gap 106g. As a result, the transmission member TR1 holds the first receiving cylindrical portion 276 (the inner cylindrical portion 106 d) with the plurality (three) of the rearward extending portions 252. The transmission member TR1 is supported from the inside by the first receiving cylindrical portion 276 (inner cylindrical portion 106 d) so as to be movable in the front-rear direction. The transmission member TR1 is supported by the inner cylinder portion 106d and the outer cylinder portion 106a so as to be movable in the front-rear direction. Further, as described above, the slide protrusion 106f is inserted into the guide hole 256. The guide hole 256 is slidable while being guided by the slide protrusion 106f. That is, the transmission member TR1 is supported by the slide protrusion 106f so as to be movable in the front-rear direction.

The gap 106g constitutes a purified water passage WJ1. In other words, the gap 106g is the purified water flow path WJ. A transmission member TR1 is provided in the purified water flow path WJ. The power transmission member TR1 provided in the purified water flow path WJ can easily abut on the regulation member RG1 provided in the purified water flow path WJ.

When the rearward extending portions 252 of the transmission member TR1 are formed by a plurality of leg portions 253 or the like as in the present embodiment, a space is formed between the rearward extending portions 252. This space serves as the purified water flow path WJ and helps ensure a sufficient purified water flow rate. That is, the power transmission member TR1 includes: a base portion 250 having a release adjustment abutment surface 260; rearward extensions 252 extending rearward from the base portion 250 and terminating at cartridge abutment surfaces 254 and configured to form a space between the rearward extensions 252 that forms a portion of the purified water flow path WJ to help ensure adequate purified water flow.

Fig. 15 (a) and 15 (b) show the regulation member RG1, the transmission member TR1, the interlock abutment portion LC1, and the like in a state where the water purification cartridge PC1 is not attached. The receiving portion forming member 106 is omitted in fig. 15 (a) and 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 regulating member RG1 is biased toward the rotational direction by the biasing member 104 so as to be in the first state. In the unattached state, the transmission member TR1 is not pressed from behind. The transmission member TR1 is located at the rear position P1 in the unattached state. Even if the transmission member TR1 is located on the front side with respect to the rear position P1, as long as the water purification cartridge PC1 is not attached, the transmission member TR1 is pressed by the regulation member RG1 biased by the biasing member 104 to return to the rear position P1.

As shown in fig. 15 (b), when the user attempts to move the manipulation portion 14 from the protruding position to the depressed position in a state where the regulation member RG1 is in the first state J1, the interlock abutment portion LC1 that moves in conjunction with the movement of the manipulation portion 14 abuts on the regulation member RG1 that is in the first state J1. That is, the end surface 132 of the interlock abutment portion LC1 abuts on the switching regulation portion 114 of the regulation member RG1. This abutment prevents the operating portion 14 from reaching the switching operating position. As a result, the manipulation that attempts to move the manipulation portion 14 to the depressed position is prevented. Even when the operating portion 14 is pressed, the operating portion 14 is prevented from reaching the depressed position. In this way, the regulation member RG1 in the first state J1 prevents the switching mechanism from the raw water discharge to the purified water discharge.

The drainage head 8 includes a holding abutment portion 296 (see fig. 3 (b)) that abuts on the regulation member RGl in the first state Jl. In the present embodiment, the holding abutment portion 296 is a slide projection 106f (see fig. 13 (a) and 13 (c)). In the first state J1, the holding abutment portion 296 abuts on the first state holding portion 116 of the regulation member RG1 (see fig. 6 (c)). The abutment between the first state maintaining portion 116 and the retaining abutment portion 296 prevents rotation of the regulating member RG1 in the first direction that would otherwise occur when the switching regulating portion 114 is pressed by the interlocking abutment portion LC1. Referring to fig. 3 (b), the abutment between the first state maintaining portion 116 and the retaining abutment portion 296 prevents a clockwise rotation (rotation in the first direction) of the regulating member RG1 that would otherwise occur when the switching regulating portion 114 is pressed by the interlocking abutment portion LC1.

Fig. 16 (a) and 16 (b) show the regulation member RG1, the transmission member TR1, the interlock abutment portion LC1, and the like in a state where the water purification cartridge PC1 is attached. The receiving portion forming member 106 is also omitted in fig. 16 (a) and 16 (b). As shown in fig. 16 (a), the regulating member RG1 is in the second state J2 in the attached state. The water purification cartridge PC1 attached in place presses the transmission member TR1 forward. That is, the downstream-side end surface 212 of the water purification cartridge PC1 presses the cartridge abutment surface 254 of the transmission member TR1. This pressing moves the transmission member TR1 forward. By this pressing, the transmission member TR1 is moved to a front position P2 located on the front side with respect to the rear position P1. The transmission member TR1 moved to the front position P2 rotates the regulation member RG1. The release-adjustment abutment surface 260 of the power transmitting member TR1 presses the release-adjustment abutment portion 112 of the adjusting member RG1 to rotate the adjusting member RG1. The rotation is in a second direction opposite to the first direction. The retaining abutment portion 296 does not interfere with the rotation of the regulation member RG1 in the first state J1 in the second direction. In this way, the transmission member TR1 is moved to the front position P2, thereby shifting the state of the adjusting member RG1 to the second state J2. The transition from the first state J1 to the second state J2 is achieved by rotation of the regulating member RG1 about the shaft portion 110. This rotation is performed while resisting the biasing force of the biasing member 104.

As shown in fig. 16 (b), when the regulating member RG1 is in the second state J2, the manipulating portion 14 is allowed to move from the protruding position to the depressed position. Even when the manipulation portion 14 reaches the switch operation position, the regulation member RG1 does not interfere with the interlock abutment portion LC1. That is, the end face 132 of the interlock abutment portion LC1 does not abut on the switching regulation portion 114 of the regulation member RG1. As a result, the manipulation portion 14 is allowed to move to the depressed position, thereby achieving the purified water discharge state. In this way, the regulation member RG1 in the second state J2 allows the switching mechanism to switch from raw water discharge to purified water discharge.

The switching regulation portion 114 of the regulation member RGl is located at the first position in the first state Jl, and is located at the second position in the second state J2. In the present embodiment, the mutual switching between the first position and the second position is achieved by rotation of the adjusting member RG1. In the switching process from the discharge of raw water to the discharge of purified water by the switching mechanism, the switching regulation portion 114 located at the first position abuts on the interlock abutment portion LC1 that moves in conjunction with the movement of the switching mechanism (see fig. 15 (b)). In the switching process from the raw water discharge to the purified water discharge by the switching mechanism, the switching regulation portion 114 located at the second position does not abut on the interlock abutment portion LC1 (see fig. 16 (b)).

The method for switching between the first state Jl and the second state J2 is not limited to the rotation of the adjustment member RGl. For example, the conversion may be realized by movement (parallel movement), movement involving rotation, or the like, instead of rotation. The change between the first state J1 and the second state J2 is not limited, and only the respective purposes of the first state J1 and the second state J2 need to be achieved. That is, only the first state J1 is required to prevent the switching mechanism from switching from raw water discharge to purified water discharge, and only the second state J2 is required to allow the switching mechanism to switch from raw water discharge to purified water discharge.

The water purification cartridge PC1 includes a deregulation portion DR1, which deregulation portion DR1 changes the state of the regulating member from the first state J1 to the second state J2. In the present embodiment, the downstream-side end surface 212 (the dividing portion 214) is the release regulating portion DR1 (see fig. 8, fig. 16 (a) and fig. 16 (b)).

The release regulating portion DR1 is a surface facing forward. The deregulation part DR1 is shown in a front view (fig. 9 (b)) of the water purification cartridge PC1 as viewed from the front side. The deregulation section DR1 is located on the upstream side with respect to the first annular packing s 1. The deregulating part DR1 is located on the downstream side with respect to the second annular packing s2. The deregulating part DR1 is located between the first annular packing s1 and the second annular packing s2. The relief portion DR1 is provided in the purified water flow path WJ. The deregulating part DR1 faces the purified water flow path WJ.

The release portion DR1 abuts on the power transmission member TR1. As shown in fig. 16 (a), when the water purification cartridge PC1 is attached in place, the release adjusting portion DR1 presses the transmission member TR1 forward. That is, the release adjustment portion DR1 presses the cartridge abutment surface 254 of the transmission member TR1. This pressing moves the transmission member TR1 forward. By this pressing, the transmission member TR1 is moved to a front position P2 located on the front side with respect to the rear position P1. The transmission member TR1 moved to the front position P2 rotates the regulation member RG1. The release adjustment abutment surface 260 of the power transmitting member TR1 presses the release adjustment abutment portion 112 of the adjusting member RG1 to rotate the adjusting member RG1. The release regulation portion DR1 does not directly abut on the regulation member RG1. The release adjustment portion DR1 switches the state of the adjustment member RG1 to the second state J2 via the transmission member TR1.

When switching from raw water discharge to purified water discharge is performed, the raw water stop valve V1 is closed. When the flow of raw water is shut off by closing the raw water stop valve V1, a water hammer or high water pressure occurs. This water hammer or high water pressure is emitted from the vicinity of the raw water stop valve V1 and propagates toward the upstream side through the raw water flow path WG.

The same applies to the switching from the purified water discharge to the raw water discharge. When switching from purified water discharge to raw water discharge is performed, the purified water stop valve V2 is closed. When the flow of the purified water 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 is emitted from the vicinity of the purified water stop valve V2 and propagates through the purified water flow path WJ toward the upstream side.

The water hammer or high water pressure reaches the downstream side of the foremost part 170 of the water purification cartridge PC1. A water hammer or high water pressure reaches the front end closed outer surface 196 and applies pressure to the front end closed outer surface 196. The water purification cartridge PC1 swings (vibrates) due to the pressure. This oscillation also vibrates the transmission member TR1 and the regulation member RG1 that move in conjunction with the movement of the water purification cartridge PC1. These vibrations may prevent adhesion between the components.

If the regulating member RG1 is provided in the raw water flow path WG, dirt or the like may adhere to the regulating member RG1, which may cause a malfunction. Similarly, if the deregulation part DR1 is provided in the raw water flow path WG, dirt or the like adheres to the deregulation part DR1, which may cause malfunction. Particularly, in the case of repairing a water pipe or the like after the installation work of the faucet device in a kitchen or the like, the amount of dirt or the like contained in raw water increases, which may cause a malfunction.

In the drain head 8, a regulating member RG1 is provided in the purified water flow path WJ. Therefore, the regulating member RG1 is less likely to adhere dirt or the like. Dirt or the like is less likely to adhere to the release regulation abutment portion 112 and the switch regulating portion 114 of the regulating member RG1. Dirt or the like is less likely to adhere to the shaft portion 110 of the regulating member RG1. An adjusting member supporting portion 106e (see fig. 13 (a)) that rotatably supports the shaft portion 110 is also provided in the purified water passage WJ1, and therefore dirt or the like is less likely to adhere. Thus, a malfunction caused by the regulation member RG1 is prevented.

In the drain head 8, a relief portion DR1 is provided in the purified water flow path WJ. Therefore, the deregulating part DR1 is less likely to adhere dirt and the like. Therefore, a malfunction caused by the deregulating part DR1 is prevented.

In the drain head 8, a transmission member TR1 is provided in the purified water flow path WJ. Therefore, the power transmission member TR1 is less likely to adhere dirt or the like. Dirt and the like are less likely to adhere to the rearward extension 252, the cartridge abutment surface 254, the guide hole 256, and the release adjustment abutment surface 260. Therefore, malfunction caused by the power transmitting member TR1 is prevented.

In the drain head 8, an interlock abutment portion LC1 is provided in the purified water flow path WJ. Therefore, the interlock abutment portion LC1 is less likely to adhere dirt or the like. Dirt or the like is less likely to adhere to the end face 132 of the interlock abutment portion LC1. Therefore, the malfunction caused by the interlocking abutting portion LC1 is prevented.

In the drain head 8, a portion abutting against each other to perform a function of blocking switching from raw water discharge to purified water discharge, and a portion abutting against each other to perform a function of canceling the blocking are provided in the purified water flow path WJ. Thus, malfunctions associated with blocking and de-regulation are prevented.

The regulation member RG1 is provided on the downstream side of the water purification cartridge PC1. Since the regulating member RG1 is provided in the purified water flow path WJ, there is a possibility that one may attempt to provide the purified water flow path WJ also on the downstream side of the water purification cartridge PC1. However, doing so reduces the vibration of the water purification cartridge PC1. Although the water hammer or the high water pressure occurs both when the raw water stop valve V1 is closed and when the purified water stop valve V2 is closed as described above, a higher degree of water hammer or a higher water pressure occurs when the raw water stop valve V1 is closed. That is, the water hammer degree or the water pressure in the raw water flow path WG is greater than the water hammer degree or the water pressure in the purified water flow path WJ. The front-end closed outer surface 196 disposed to face the raw water flow path WG causes a higher degree of water hammer or a higher water pressure, thereby promoting vibration of the water purification cartridge PC1 and the member that moves in conjunction with the movement of the water purification cartridge PC1.

As described above, the recessed portion 176 is provided in the front end closed outer surface 196 (the outer surface of the foremost portion 170). The concave portion 176 can more effectively catch a water hammer or a high water pressure than a flat surface or the like without a concave portion. The recessed portion 176 can promote vibration of the water purification cartridge PC1 and the member that moves in conjunction with the movement of the water purification cartridge PC1.

The raw water passage WG1 extends in the radial direction. The presence of the concave portion 176 achieves effective capture of the water flow in the raw water passage WG1 extending in the radial direction. The concave portion 176 can effectively catch a water hammer or a high water pressure in the raw water passage WG1 extending in the radial direction. Therefore, the vibration of the water purification cartridge PC1 and the member that moves in conjunction with the movement of the water purification cartridge PC1 is promoted.

In order to obtain a structure in which the regulating member RG1 is provided in the purified water flow path WJ and the front-end closed outer surface 196 faces the raw water flow path WG, the drain head 8 includes a raw water passage WG1 (see fig. 14) provided on the downstream side of the front-end closed outer surface 196 and facing the front-end closed outer surface 196. 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 on the downstream side of the raw water passage WG1 are separated from each other by a partition wall 290. The partition wall 290 is located at the downstream side of the raw water passage WG1. The purified water flow path WJ and the regulation member RG1 are provided 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)).

In this way, the raw water flow path WG and the partition wall 290 are disposed between the regulation member RG1 and the water purification cartridge PC1. The regulating member RG1 is located away from the water purification cartridge PC1. Due to the presence of the transmission member TR1, the raw water flow path WG and the partition wall 290 may be disposed between the water purification cartridge PC1 and the regulation member RG1 disposed in the purified water flow path WJ. The base portion 250 of the transmission member TR1 is located on the downstream side with respect to the raw water flow path WG and the partition wall 290. The cartridge abutment surface 254 of the transmission member TR1 is located on the upstream side with respect to the front end closure outer surface 196.

As shown in fig. 14, the deregulated portion DR1 of the water purification cartridge PC1 is located on the upstream side with respect to the front end closed outer surface 196. The relief portion DR1 is located at a position different from that of the front-end closed outer surface 196, so that the relief portion DR1 and the front-end closed outer surface 196 can be disposed in respective flow paths different from each other.

The deregulating part 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 filler s1 and the second annular filler s2 each serve as a partition between the raw water flow path WG and the purified water flow path WJ. Therefore, the deregulating part DR1 can be disposed in the purified water flow path WJ while the front end closed outer surface 196 is disposed in the raw water flow path WG. Since the relief portion DR1 exists in the purified water flow path WJ, it is helpful to provide the transmission member TR1 and the regulation member RG1 in the purified water flow path WJ.

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 located radially outward relative to the radially inner edge 242 a. The radially outer edge 242b is located on the upstream side with respect to the radially inner edge 242 a.

The relief portion DR1 is provided adjacent to the purified water outlet hole 240, and the purified water outlet hole 240 connects the purified water flow path WJ provided inside the water purification cartridge PC1 and the purified water flow path WJ (purified water passage WJ 1) provided in the connection receiving portion 274. The relief portion DR1 is a surface extending outward in the radial direction from the radially outer edge 242b. As described above, the release regulating portion DR1 is the downstream-side end surface 212 (the dividing portion 214), and is an annular surface. The release regulating portion DR1 as an annular surface has a radially inner edge forming a radially outer edge 242b of the outlet opening edge 242. This configuration enables the relief portion DR1 to be formed at an intermediate position on the upstream side with respect to the front-end closed outer surface 196 while ensuring a sufficient cross-sectional area of the purified water outlet hole 240.

As shown in fig. 11, the connection terminal portion 152 includes a purified water outlet hole 240, a first annular packing s1 located on the downstream side with respect to the purified water outlet hole 240, and a second annular packing s2 located on the upstream side with respect to the purified water outlet hole 240. The outer diameter G1 of the first annular packing s1 is smaller than the outer diameter G2 of the second annular packing s2. Due to this configuration, it is convenient to provide the release regulation portion DR1 between the first annular packing s1 and the second annular packing s2. This configuration enables formation of the relief portion DR1 while preventing the water purification cartridge PC1 from becoming complicated in shape, increasing in cost, and decreasing in flow rate.

In the present embodiment, the deregulating part DR1 is constituted by a plurality of dividing parts 214. The deregulation parts DR1 are distributed to have a circular ring shape (see fig. 9 (b)). Meanwhile, the plurality of cartridge abutment surfaces 254 of the transmission member TR1 are arranged in the circumferential direction. Therefore, even when the circumferential direction position (phase) of the water purification cartridge PC1 is changed, the cartridge abutment surface 254 can be stably abutted on the relief portion DR1.

The number of the rearwardly extending portions 252 is not limited. One rearwardly extending portion 252 or two rearwardly extending portions 252 may be provided. The number of the rearwardly extending portions 252 is preferably greater than or equal to three from the viewpoint of stably abutting on the release regulating portion DR1. When the backward extending portion 252 is provided in the purified water flow path WJ, the excessive backward extending portion 252 causes the flow rate of the purified water to be reduced. From this viewpoint, the number of the rearwardly 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.

In the present embodiment, O-rings are used as the annular packings s1 and s2. The O-ring has a circular cross-sectional shape. The annular packing need not have a circular cross-sectional shape. Alternatively, for example, an O-ring having an elliptical cross-sectional shape may be used as the annular packing. The annular packing is not limited to such an O-ring. Further, the cross-sectional shape of the annular packing is not limited. Examples of usable ring packings include a quadrangular packing having a quadrangular cross section, a U-shaped packing having a U-shaped cross section, a V-shaped packing having a V-shaped cross section, a Y-shaped packing having a Y-shaped cross section, and an X-shaped packing having an X-shaped cross section. From the viewpoint of ensuring sealability (water tightness) and preventing the annular packing from adhering to the water purification cartridge and other surrounding members, it is preferable to use an O-ring, and it is particularly preferable to use an O-ring having a circular cross section as the annular packing.

Examples of the material of the regulation member RG1 include resin or metal. From the viewpoint of cost, when the material is metal, the process for manufacturing the regulating member RG1 is preferably sintering, casting, or forging. When the material is a resin, a thermoplastic resin which is easily formable is preferably used. From the viewpoint of formability, more preferable examples include polyoxymethylene resin (POM), polyphenylene sulfide resin (PPS), acrylonitrile butadiene styrene resin (ABS), and polypropylene resin (PP). From the viewpoint of strength, polyphenylene sulfide resin (PPS) is particularly preferable.

Examples of the material of the power transmission member TR1 include resin or metal. From the viewpoint of cost, when the material is metal, the process for manufacturing the transmission member TR1 is preferably sintering, casting, or forging. When the material is a resin, a thermoplastic resin which is easily formable is preferably employed. From the viewpoint of formability, more preferable examples include polyoxymethylene resin (POM), polyphenylene sulfide resin (PPS), acrylonitrile butadiene styrene resin (ABS), and polypropylene resin (PP). Polyoxymethylene resin (POM) is particularly preferable when slidability with respect to adjacent members such as the regulating member RG1 is more important. When the strength is more important, polyphenylene sulfide resin (PPS) is particularly preferable.

Examples of the material of the deregulation portion DR1 of the water purification cartridge PC1 include resin and metal. From the viewpoint of cost, when the material is metal, the process for manufacturing the member including the relief portion DR1 is preferably sintering, casting, or forging. When the material is a resin, a thermoplastic resin which is easily formable is preferably employed. From the viewpoint of formability, more preferable examples include polyoxymethylene resin (POM), polyphenylene sulfide resin (PPS), acrylonitrile butadiene styrene resin (ABS), and polypropylene resin (PP). From the viewpoints of formability and cost, an acrylonitrile butadiene styrene resin (ABS) and a polypropylene resin (PP) are particularly preferable.

Examples of the material of the connection receiving portion 274 include resin or metal. From the viewpoint of cost, when the material is metal, the process for manufacturing the member including the connection receiving portion 274 is preferably sintering, casting, or forging. When the material is a resin, a thermoplastic resin which is easily formable is preferably employed. From the viewpoint of formability, more preferable examples include polyoxymethylene resin (POM), polyphenylene sulfide resin (PPS), acrylonitrile butadiene styrene resin (ABS), and polypropylene resin (PP). From the viewpoints of formability and cost, acrylonitrile butadiene styrene resin (ABS) and polypropylene resin (PP) are particularly preferable.

After each predetermined period of use, the water purification cartridge PC1 is replaced with a new one, but without replacing the regulating member RG1. The regulating member RG1, which is repeatedly used for a long time, preferably has high rigidity and high wear resistance. From this viewpoint, the material of the regulation member RG1 preferably has a longitudinal elastic modulus of greater than or equal to 3GPa, more preferably greater than or equal to 5GPa, and still more preferably greater than or equal to 10GPa. In view of the above-described preferred materials, the longitudinal elastic modulus of the material of the regulation member RG1 is preferably less than or equal to 30GPa, more preferably less than or equal to 20GPa, and still more preferably less than or equal to 15GPa. The longitudinal elastic modulus of the material of the regulation member RG1 is preferably larger than the longitudinal elastic modulus of the material of the release regulation portion DR1. The longitudinal modulus of elasticity of the material of the adjusting member RG1 is preferably greater than the longitudinal modulus of elasticity of the material of the transmission member TR1.

After each predetermined period of use, the water purification cartridge PC1 is replaced with a new one without replacing the transmission member TR1. The power transmission member TR1, which is repeatedly used for a long time, preferably has high slidability as well as high rigidity and high wear resistance. In view of having high rigidity and high wear resistance, the longitudinal elastic modulus of the material of the transmission member TR1 is preferably greater than or equal to 0.1GPa, more preferably greater than or equal to 1.0GPa, and still more preferably greater than or equal to 2.0GPa. In view of the above-described preferred materials, the longitudinal elastic modulus of the material of the power transmission member TR1 is preferably less than or equal to 10GPa, more preferably less than or equal to 7GPa, and still more preferably less than or equal to 5GPa. The longitudinal elastic modulus of the material of the power transmission member TR1 is preferably larger than the longitudinal elastic modulus of the material of the release adjustment portion DR1.

The water purification cartridge PC1 is preferably configured such that the material of the relief portion DR1 has a longitudinal elastic modulus EM1 smaller than a longitudinal elastic modulus EM2 of the material of the corresponding portion against which the relief portion DR1 abuts. This configuration prevents damage and/or wear to the counterpart (e.g., the transmission member TR 1) that is repeatedly used for a long time. From this viewpoint, the ratio of EM1 to EM2 (EM 1/EM 2) 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 (EM 1/EM 2) may excessively reduce the strength and/or abrasion resistance of the water purification cartridge PC1. From this viewpoint, the ratio (EM 1/EM 2) 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.

The longitudinal elastic modulus is obtained from the relationship between tensile stress and strain amount. The longitudinal elastic modulus is a proportionality constant between the amount of strain and stress in the elastic range, and is also referred to as young's modulus. The longitudinal modulus of elasticity of typical materials is described in many documents and is known. If the literature fails to provide accurate values, the longitudinal modulus of elasticity can be measured according to ASTM D638. In the measurement, a test piece made of the same material as that of the member to be measured may be used.

In the water purification cartridge PC1 according to the above-described embodiment, the intermediate portion 150 includes the permeable portion 151, and the permeable portion 151 allows water to pass through the permeable portion 151 from the outer peripheral surface of the water purification cartridge PC1 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 peripheral surface of water purification cartridge PC1 may be formed to have a water-impermeable circumferential wall, and the permeable portion may be provided inside the circumferential wall. In this case, the water purification cartridge PC1 may allow water to flow from the rear end of the water purification cartridge PC1 into the interior of the water purification cartridge PC1. For example, an inflow port may be provided on the upstream-side end (rear end) of the water purification cartridge PC1. The inflow port may be provided on the rear formation portion 154. Water can flow into the water purifying cartridge PC1 from the inflow port, pass through the permeable portion, and then reach the connection terminal portion 152.

In the above-described embodiment, the water purification function portion is a permeable portion, and purified water is generated by allowing raw water to pass through the permeable portion. As described above, the permeable part is one example of the water purification function part. Alternatively, purified water may be produced without passing through the permeable portion. For example, the water purification cartridge may include a metal material that releases metal ions having a disinfecting, antibacterial, bactericidal or bacteria growth inhibiting effect, so that purified water can be generated.

The purified water in the present disclosure conceptually includes the following generated waters (1) and (2):

(1) Produced water obtained by removing substances, ions and the like contained in water using an absorbent, a filtration membrane or the like;

(2) To provide beneficial characteristics (e.g., disinfection effect by addition of metal ions, etc.), produced water is obtained by adding metal ions, electrons, substances, etc. to water.

Specifically, the 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 function part in the present disclosure conceptually includes a function part having the following function a and/or function B.

[ function A ]

Function a represents one or more functions selected from the group consisting of functions A1, A2, A3, A4, and A5 below.

A1: the function of absorbing and removing substances contained in water by using an absorbent such as activated carbon.

A2: the function of filtering out substances contained in water by using a filtering material. Preferably, the filtering material is a filtering 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 substances contained in water is achieved by the filtering membrane.

A3: and a function of trapping and removing metal ions and the like contained in water using an ion exchange resin or the like.

A4: allowing the metal material to release metal ions having a disinfecting, antibacterial, bactericidal and/or bacterial growth inhibiting effect.

A5: allowing the metal material to release metal ions and allowing oxygen in the water to acquire electrons released together with the released metal ions, thereby generating a function of active oxygen.

Examples of substances to be removed from water for purification include chlorine, volatile organic compounds, agrochemicals, musty substances and heavy metals. Preferably removing one or more substances selected from the group consisting of chlorine, volatile organic compounds, agrochemicals, musty substances and heavy metals.

In the present disclosure, "chlorine" conceptually includes residual chlorine contained in tap water. Among the residual chlorine, free residual chlorine and bound residual chlorine are included. Examples of free residual chlorine include hypochlorous acid and hypochlorite ions. Examples of bound residual chlorine include monochloramine, dichloramine, and trichloroamine. Such residual chlorine can be generated by dissolving chlorine gas in water in order to disinfect the water.

Examples of volatile organic compounds include chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1-trichloroethane, and total trihalomethanes. One or more substances selected from the group consisting of chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1-trichloroethane and total trihalomethanes are preferably removed.

Examples of agrochemicals include 2-chloro-4, 6-bis (ethylamino) -1,3, 5-triazine. Preferably 2-chloro-4, 6-bis (ethylamino) -1,3, 5-triazine is removed.

Examples of the musty substances include 2-methylisobornyl alcohol, geosmin and phenol. One or more substances selected from 2-methylisoborneol, geosmin and phenol are preferably removed.

Examples of heavy metals include lead, mercury, copper, arsenic and cadmium. Preferably removing one or more substances selected from lead, mercury, copper, arsenic and cadmium.

Examples of the metal ions in function A4 include zinc ions and silver ions. Preferably releasing one or more ions selected from the group consisting of zinc ions and silver ions.

Examples of the bacteria in function A4 include colonic bacilli and staphylococci, and miscellaneous bacteria defined as common bacteria (included in common bacteria). Preferably to achieve a disinfecting, anti-bacterial, bactericidal or bacterial growth inhibiting effect on one or more of those bacteria.

The active oxygen in function A5 can decompose organic substances such as bacteria. Examples of the bacteria include colonic bacilli and staphylococci, and miscellaneous bacteria defined as common bacteria (included among common bacteria). One or more of these bacteria are preferably decomposed.

In addition to suppressing the manufacturing cost of the water purification cartridge, the water purification cartridge preferably has the function A1 from the viewpoint of effectively removing chlorine and harmful substances. In addition to function A1, the water purification cartridge may also have one or more functions selected from the group consisting of functions A2, A3, A4 and A5.

[ function B ]

Function B is a function of purifying water by using a filter material and/or a medium as defined in "(vi) water purifier" in appendix 2 (on article 2) of the miscellaneous article quality label provisions (revision date: 30/effective date: 4/1/2017). In other words, the water purification cartridge preferably comprises a water purification function which purifies water by using the filter material and/or medium defined in "(vi) water purifier" in appendix 2 (for article 2) of miscellaneous finished product quality label regulations (revision date: 3/30/effective date: 4/1/2017).

The water purification function portion having function a and/or function B may constitute a part of the purified water flow path, or may alternatively be provided in the purified water flow path, or further alternatively may be provided in a pool portion communicating with the purified water flow path.

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 of a composite type in which the water purification cartridge is composed of a plurality of detachable members.

For example, a composite water purification cartridge can have a construction that includes a cartridge body portion and an adapter member that includes a deregulated portion. The adapter member can be connectable to the cartridge body portion, or alternatively, can be non-connectable to the cartridge body portion. In other words, the adapter member may be attachable to the cartridge body portion, or alternatively, may not be attachable to the cartridge body portion. When the adapter member is attachable to the cartridge body portion, the adapter member may be removably attached to the cartridge body portion, or alternatively, may be non-removably attached to the cartridge body portion.

The configuration of the adapter member and the cartridge body portion is not limited. Examples of the configurations 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 construction wherein 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 one portion of the cartridge receiving portion, and then the cartridge body portion is attached to another portion of the cartridge receiving portion.

B4: a construction wherein the adapter member is first attached to one portion of the cartridge receiving portion and then the cartridge body portion is attached to the adapter member and another portion of the cartridge receiving portion.

In the above configurations B1 to B4, the adapter member may be detachably attached to the cartridge receiving portion, or alternatively, may be non-detachably attached to the cartridge receiving portion. However, when the adapter member is non-removably attached to the cartridge receiving portion, the adjustment member remains in the second state. Accordingly, the adapter member is preferably removably attached to the cartridge receiving portion.

The following items are disclosed with respect to the above embodiments.

[ Bar 1]

A water discharge head having a water purification function, the water discharge head comprising:

an outlet port;

a raw water flow path;

a purified water flow path;

a switching mechanism capable of switching the water discharge from the discharge port between the raw water discharge and the purified water discharge;

a regulation member that is mutually switchable between a first state that prevents switching of the switching mechanism from raw water discharge to purified water discharge and a second state that allows switching of the switching mechanism from raw water discharge to purified water discharge;

a water purification cartridge comprising a release regulating portion and a front end closed outer surface, the release regulating portion causing the regulating member to transition from the first state to the second state, the front end closed outer surface being impermeable to water; and

a cartridge receiving portion, wherein

When the water purification cartridge is not attached to the cartridge receiving portion, the adjustment member is in the first state,

when the water purification cartridge is attached to the cartridge receiving part, the regulation member is brought into the second state by releasing the regulation part, the front-end closed outer surface faces the raw water flow path, and

the regulating member is disposed in the purified water flow path.

[ Bar item 2]

The drainage head of claim 1, further comprising a transmission member that is interconvertible between a forward position and a rearward position, wherein

When the water purification cartridge is attached, the transmission member moves to the front position, and

movement of the transmission member to the forward position shifts the adjustment member to the second state.

[ Bar 3]

The discharge head of clause 2, wherein,

the release regulating portion is located on an upstream side with respect to the front end closed outer surface, and

when the water purification cartridge is attached, the release adjustment portion presses the transmission member so that the transmission member moves to the front position.

[ clause 4]

The discharge head of clause 3, wherein,

the cartridge receiving portion includes a connection receiving portion,

the water purification cartridge includes a connection terminal part connected to the connection receiving part,

the connection terminal portion includes a purified water outlet hole, a first annular packing and a second annular packing, the first annular packing being located on a downstream side with respect to the purified water outlet hole, the second annular packing being located on an upstream side with respect to the purified water outlet hole;

the outer diameter G1 of the first annular packing is smaller than the outer diameter G2 of the second annular packing, and

the release adjusting portion is located between the first annular packing and the second annular packing.

[ Bar 5]

The drainage head of any of clauses 1 to 4, wherein,

a raw water passage constituting a raw water flow path is provided at a downstream side of the water purification cartridge,

the front end closed outer surface faces the raw water channel,

the partition wall is disposed on the downstream side of the raw water passage, and

the purified water flow path and the regulating member are disposed on the downstream side of the partition wall.

[ Bar 6]

A water purification cartridge attachable to a water discharge head having a water purification function,

the drainage head includes:

an outlet port;

a purified water flow path in which an adjustment member is provided;

a raw water flow path; and

a cartridge receiving portion, and

water purification cartridge includes:

a water purification function part;

a release regulating portion that switches the regulating member from the first state to the second state; and

a front-end closed outer surface facing the raw water flow path and being watertight.

[ clause 7]

A water purification cartridge according to clause 6, wherein

The water discharge head further comprises a transmission member that is switchable between a front position and a rear position, the release of the adjustment part moves the transmission member to the front position when the water purification cartridge is attached, and

movement of the transmission member to the forward position allows the adjustment member to transition to the second state.

[ clause 8]

A faucet assembly comprising a discharge head according to any one of clauses 1 to 5.

The present disclosure also provides other inventions not included in the inventions recited in the claims (including the independent claims). The modes, members, configurations, and the like described in the claims and the embodiments of the present disclosure are considered as inventions based on their respective advantageous effects.

The modes, members, configurations, and the like disclosed in the embodiments can be individually applied to all the inventions disclosed in the present disclosure, including the inventions recited in the claims, even if not all the modes, members, and configurations are included according to the embodiments.

List of reference numbers

2. Water tap device

4. Body part

6. Lever handle

8. Drainage head

14. Operating part

106. Receiving portion forming member

106f sliding projection

112. Deadjust abutment portion of adjustment member

114. Switching regulation part of regulation member

116. First state holding portion of regulating member

132. End faces of interlocking abutment portions

152. Connection terminal part of water purification cartridge

170. Foremost part of water purification cartridge

176. Concave part

196. Front end closed outer surface

240. Outlet hole for purified water

254. Filter element abutment surface of transmission member

260. Deadjust abutment surface of drive member

274. Connection receiving part

290. Partition wall

s1 first annular packing

s2 second annular packing

RG1 regulating member

DR1 deregulating moiety

TR1 drive member

LC1 interlocking abutment

PC1 water purification filter element

J1 First state of the regulating member

J2 Second state of the regulating member

P1 rear position (drive component)

P2 front position (drive component)

WJ purified water flow path

WJ1 purified water channel

WG raw water flow path

WG1 raw water channel

Claims

1. A water purification cartridge, comprising:

an intermediate portion as a water purification function;

a connection terminal portion provided on a downstream side of the intermediate portion; and

a rear forming portion provided at a rear end portion of the intermediate portion, wherein

The connection terminal portion includes: a purified water outlet hole; a first annular packing located on a downstream side with respect to an outlet opening edge of the purified water outlet hole; a second annular packing located on an upstream side with respect to the outlet opening edge of the purified water outlet hole; and a downstream side end surface facing forward, wherein

The downstream-side end surface is located on an upstream side with respect to the first annular packing and on a downstream side with respect to the second annular packing.

2. A water purification cartridge, comprising:

an intermediate portion as a water purification function portion;

The connection terminal portion includes: a purified water outlet hole; an annular packing located on an upstream side with respect to an outlet opening edge of the purified water outlet hole; and a downstream side end surface facing forward, wherein

The downstream-side end surface is located on a downstream side with respect to the annular packing.

3. Water purification cartridge according to claim 1 or 2, wherein the downstream side end face is visually identified in a front view of the water purification cartridge from a front side.

4. The water purification cartridge of claim 1 or 2, wherein the downstream side end face is a surface extending in a radial direction.

5. The water purification cartridge of claim 1 or 2, wherein the downstream end face is an annular surface.

6. The water purification cartridge of claim 1, wherein the first annular packing has an outer diameter G1 that is less than an outer diameter G2 of the second annular packing.

7. The water purification cartridge of claim 6, wherein,

the outer diameter G1 is greater than or equal to 7mm and less than or equal to 18mm, and

the difference (G2-G1) between the outer diameter G2 and the outer diameter G1 is greater than or equal to 3mm and less than or equal to 15mm.

8. The water purification cartridge of claim 6, wherein,

the outer diameter G2 is greater than or equal to 12mm and less than or equal to 25mm, and

9. The water purification cartridge of claim 6, wherein

G2/G1 is greater than or equal to 1.2 and less than or equal to 2.5.

10. The water purification cartridge of claim 6, wherein,

G2/G1 is greater than or equal to 1.2 and less than or equal to 2.5.

11. The water purification cartridge of claim 1, wherein the downstream side end face is located between the first annular packing and the second annular packing.

12. The water purification cartridge of claim 1 or 2, wherein the downstream side end face has a radial direction width greater than or equal to 1.0mm and less than or equal to 6.0mm.

13. Water purification cartridge according to claim 1 or 2, wherein the water purification cartridge is attachable to a water discharge head having a water purification function,

the drainage head includes:

an outlet port;

a switching mechanism capable of switching the water discharge from the discharge port between raw water discharge and purified water discharge;

a purified water flow path;

a raw water flow path; and

a cartridge receiving portion.

14. The water purification cartridge of claim 1 or 2, wherein the downstream side end face is positioned adjacent to the outlet opening edge of the purified water outlet aperture.

15. Water purification cartridge according to claim 1 or 2, wherein

The water purification cartridge is attachable to a water discharge head having a water purification function,

the drainage head includes:

an outlet port;

an adjustment member that is mutually switchable 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 allows the switching mechanism to switch from the raw water discharge to the purified water discharge;

a purified water flow path in which the regulating member is provided;

a raw water flow path; and

a filter cartridge receiving portion, and

the water purification cartridge further comprises:

a water purification function part; and

a release regulating portion that switches the regulating member from the first state to the second state, wherein

The release regulation portion is the downstream-side end face.

16. The water purification cartridge of claim 13, wherein the downstream side end face is disposed in the purified water flow path.

17. The water purification cartridge of claim 15, wherein the downstream side end face is disposed in the purified water flow path.

18. A water purification cartridge, comprising:

an intermediate portion as a water purification function 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; a second annular packing located on an upstream side with respect to the purified water outlet hole; a downstream side end surface facing forward; and a front end closed outer surface that is impervious to water.

19. A water purification cartridge, comprising:

an intermediate portion as a water purification function;

The connection terminal portion includes: a purified water outlet hole; an annular packing located on an upstream side with respect to the purified water outlet hole; a downstream side end surface facing forward; and a front end closed outer surface that is impervious to water.

20. The water purification cartridge of claim 18 or 19, wherein the downstream side end face is visually identified in a front view looking at the water purification cartridge from the front side.

21. The water purification cartridge of claim 18 or 19, wherein the downstream side end face is on an upstream side relative to the front end closed outer surface.

22. Water purification cartridge according to claim 18 or 19, wherein the downstream side end face is a surface extending in a radial direction.

23. The water purification cartridge of claim 18 or 19, wherein the downstream side end face is an annular surface.

24. The water purification cartridge of claim 18 or 19, wherein the front end closure outer surface comprises a recessed portion.

25. The water purification cartridge of claim 18 or 19, wherein the front closed outer surface is located on a downstream side with respect to the purified water outlet hole.

26. The water purification cartridge of claim 18 or 19, wherein the downstream side end face is positioned adjacent to the purified water outlet aperture.

27. The water purification cartridge of claim 18 or 19, wherein,

the purified water outlet hole includes an outlet opening edge,

the outlet opening edge includes a radially inner edge and a radially outer edge, and

the radially outer edge is positioned radially outward relative to the radially inner edge.

28. The water purification cartridge of claim 27, wherein the radially outer edge is positioned on an upstream side relative to the radially inner edge.

29. The water purification cartridge of claim 27, wherein the downstream side end face is a surface extending outwardly from the radially outer edge in the radial direction.

30. The water purification cartridge of claim 18, wherein the first annular packing has an outer diameter G1 that is less than an outer diameter G2 of the second annular packing.

31. The water purification cartridge of claim 30, wherein

the difference (G2-G1) between the outer diameter G2 and the outer diameter G1 is not less than 3mm and not more than 15mm.

32. The water purification cartridge of claim 30, wherein

33. The water purification cartridge of claim 30, wherein,

G2/G1 is greater than or equal to 1.2 and less than or equal to 2.5.

34. The water purification cartridge of claim 30, wherein,

G2/G1 is greater than or equal to 1.2 and less than or equal to 2.5.

35. The water purification cartridge of claim 18 or 19, wherein the downstream side end face is located between the first annular packing and the second annular packing.

36. The water purification cartridge of claim 18 or 19, wherein the downstream side end face is located on an upstream side with respect to the first annular packing and on a downstream side with respect to the second annular packing.

37. Water purification cartridge according to claim 18 or 19, wherein,

the connecting terminal portion further includes a plurality of coupling extensions, and

the purified water outlet holes are provided between the coupling extensions adjacent to each other in the circumferential direction.

38. The water purification cartridge according to claim 37, wherein the downstream side end face is formed by a dividing portion that is divided by the coupling extension portion and is arranged in the circumferential direction.

39. The water purification cartridge of claim 37, wherein the downstream side end face comprises: a portion formed continuously without a gap in the circumferential direction; and a divided portion divided by the coupling extending portion and arranged in the circumferential direction.

40. The water purification cartridge of claim 39, wherein,

the downstream side end face has a radial direction width indicated by Q1,

the continuously formed portion has a radial direction width represented by Q2, and

Q2/Q1 is greater than or equal to 0.2 and less than or equal to 0.9.

41. The water purification cartridge of claim 38, wherein a diameter of a group of the partitions measured at a central position of a radial direction width of the partitions is greater than or equal to 10mm and less than or equal to 22mm.

42. The water purification cartridge of claim 37, wherein the coupling extensions each have a width greater than or equal to 0.5mm and less than or equal to 5.0 mm.

43. The water purification cartridge of claim 37, wherein,

the coupling extensions each have an extension downstream surface that is a downstream side surface of each coupling extension, and

the extension downstream surface extends inward in a radial direction further toward the downstream side.

44. The water purification cartridge according to claim 18 or 19, wherein the downstream side end face has a radial direction width Q1 of greater than or equal to 1.0mm and less than or equal to 6.0mm.

45. Water purification cartridge according to claim 18 or 19, wherein the water purification cartridge is attachable to a water discharge head having a water purification function,

the drainage head includes:

an outlet port;

a purified water flow path;

a raw water flow path; and

a cartridge receiving portion.