Water discharge head with water purification function, water purification cartridge and faucet device

Abstract

To provide an improved water purification cartridge.SOLUTION: A water purification cartridge PC1 is disposed in a water purification cartridge attachment part 134 of a water discharge head 108 with water purification function. The water purification cartridge PC1 includes a coupling end 152 coupled to a coupling receiving part 138 of the water purification cartridge attachment part 134. The coupling end 152 includes a clear water outlet port 240, a first annular packing s1 located downward of the clear water outlet port 240, and a second annular packing s2 located upstream of the clear water outlet port 240. An outer diameter G1 of the first annular packing s1 is smaller than an outer diameter G2 of the second annular packing s2.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a water spout head with a water purification function, a water purification cartridge, and a water faucet device. [Background technology]

[0002] Japanese Patent No. 6186059 discloses a water purifier cartridge that is replaceably housed in a housing of the water purifier. This water purifier cartridge is disposed downstream of the purification material and has a buffer part that blocks water hammer from the flow path switching valve to the purification material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6186059 Summary of the Invention [Problem to be solved by the invention]

[0004] The technology of Japanese Patent No. 6186059 is effective in preventing damage to the purification material. The technology of Japanese Patent No. 6186059 is effective in preventing the attachment part between the water purifier and the water purifier cartridge from sticking.

[0005] Based on this new perspective, the present inventor has found room for improvement. The present disclosure provides an improved water purification cartridge. More specifically, Two annular packings are provided at the connection end, which can prevent damage to these annular packings. Provide water purification cartridges. [Means for solving the problem]

[0006] In one embodiment, the water purification cartridge comprises: It is placed in the water purification cartridge mounting portion of a water spout head with water purification function. This water purification cartridge has a connection end portion that connects to the connection receiving portion of the water purification cartridge mounting portion. The connection end portion has a purified water outlet hole, a first annular gasket located downstream of the purified water outlet hole, and a second annular gasket located upstream of the purified water outlet hole. The outer diameter G1 of the first annular gasket is smaller than the outer diameter G2 of the second annular gasket. The outer diameter G1 of the first annular gasket is 7 mm or more and 18 mm or less. The outer diameter G2 of the second annular gasket is 12 mm or more and 25 mm or less.

[0007] In this water purification cartridge, the purified water outlet hole may pass through in the axial direction. [Effects of the Invention]

[0008] Based on a novel structure, an improved water purification cartridge is obtained. More specifically, Two annular gaskets are provided at the connection end, which can prevent damage to these annular gaskets. Furthermore, the strength of the tip of the water purification cartridge and the flow rate of purified water can be ensured while preventing the faucet from becoming too large.

[0009] Furthermore, when the purified water outlet hole penetrates in the axial direction, flow resistance can be reduced. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a water faucet device according to one embodiment. [Figure 2] FIG. 2 is a front view of the water spouting head in the faucet device of FIG. [Figure 3] Figures 3(a) and 3(b) are cross-sectional views taken along line AA in Figure 2. The phase of the water purification cartridge is different between Figures 3(a) and 3(b). [Figure 4] 4(a) is a cross-sectional view taken along line aa in FIG. 4(b), and FIG. 4(b) is a cross-sectional view taken along line bb in FIG. 4(a). [Figure 5] 5(a) is a cross-sectional view taken along line aa in FIG. 5(b), and FIG. 5(b) is a cross-sectional view taken along line bb in FIG. 5(a). [Figure 6] FIG. 6 is a perspective view of the water purification cartridge attached to the water faucet device of FIG. [Figure 7] Figure 7(a) is a side view of the water purification cartridge of Figure 6, Figure 7(b) is a front view of the water purification cartridge seen from the front (downstream side), Figure 7(c) is a cross-sectional view along line cc of Figure 7(b), and Figure 7(d) is a cross-sectional view along line dd of Figure 7(b). [Figure 8] FIG. 8 is a partially enlarged view of FIG. 7(c). [Figure 9] FIG. 9 is a partially enlarged view of FIG. 7(d). [Figure 10] FIG. 10 is a partially enlarged view of FIG. 3(b). [Figure 11] FIG. 11 is a partially enlarged view of FIG. 5(b). [Figure 12] FIG. 12 is a partially enlarged view of FIG. [Figure 13] FIG. 13 is a partially enlarged view of FIG. 2 of Japanese Patent No. 6186059. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, the embodiments will be described in detail with reference to the drawings as appropriate.

[0012] Unless otherwise specified, the radial direction in this application means the radial direction of the water purification cartridge when it is installed in the correct position. Unless otherwise specified, the axial direction in this application means the axial direction of the water purification cartridge when it is installed in the correct position.

[0013] Unless otherwise specified, the upstream side in this application refers to the upstream side in the water flow, and the downstream side refers to the downstream side in the water flow. Furthermore, in the water purification cartridge, the upstream side and downstream side are determined based on the axial direction. That is, in the water purification cartridge, the leading end side in the axial direction is the downstream side, and the trailing end side in the axial direction is the upstream side. Furthermore, unless otherwise specified, the downstream side is also referred to as the front, and the upstream side is also referred to as the rear.

[0014] [Findings that formed the basis of this disclosure] Figure 13 is a partially enlarged view of Figure 2 in Japanese Patent Publication No. 6186059. In this embodiment, two O-rings 13 are arranged on the outer peripheral surface of the connecting tubular portion 10a of the water purifier cartridge. The outer diameter of the downstream O-ring 13a is equal to the outer diameter of the upstream O-ring 13b. The outlet 10e is located at a position that coincides with the purified water receiving port 11a of the cartridge receiver 11. The outlet 10e extends radially.

[0015] When this water purification cartridge is installed, the connecting tubular portion 10a is inserted into the cartridge receiver 11. During this insertion, the downstream O-ring 13a is rubbed against the first edge 15 and then against the second edge 16. In other words, it is rubbed twice in one insertion. This makes the downstream O-ring 13a prone to damage (improvement target 1).

[0016] In the initial stage of insertion, only the downstream O-ring 13a is inserted into the cartridge receiver 11, and the upstream O-ring 13b is not inserted into the cartridge receiver 11. In this state, the center line z1 of the water purification cartridge is likely to be inclined relative to the cartridge receiver 11. Due to this inclination, the radial tips 17, 18 of the wall portions located on both sides of the downstream O-ring 13a come into contact with the inner surface of the cartridge receiver 11. Since the connecting tube portion 10a is inserted into the cartridge receiver 11 while this contact occurs, the inner surface of the cartridge receiver 11 is likely to be scratched (improvement target 2).

[0017] If the outlet 10e is inclined radially while maintaining the cross-sectional area of ​​the outlet 10e, the axial length of the area surrounding the outlet 10e increases. This increase in axial length increases the overall length of the water purification cartridge and tends to sacrifice water purification performance (length of the water purification material). On the other hand, if the outlet 10e extends radially, purified water discharged radially outward strikes the surface of the flow path forming member almost perpendicularly before flowing downstream (see the arrow in Figure 13). In this case, flow path resistance tends to increase (Improvement Target 3).

[0018] In the gap 19 between the radial tip 17 of the wall portion located upstream of the downstream O-ring 13a and the opposing member, limescale, dirt, etc. may accumulate. When the water purification cartridge is removed, this deposit may be scraped out by the downstream O-ring 13a and enter the purified water flow path through the purified water receiving port 11a (improvement target 4).

[0019] The following embodiments can improve the above-mentioned newly discovered targets for improvement.

[0020] [First embodiment] FIG. 1 is a perspective view of a water faucet device 102 according to one embodiment. The water faucet device 102 is attached to a sink (not shown). In FIG. 1, parts that are not visible, i.e., parts inside the sink, are omitted. Note that examples of locations where the water faucet device 102 can be installed include a sink, a washbasin, and a bathroom.

[0021] The faucet device 102 has a main body 104, a lever handle 106, and a spout head 108 with a water purification function. The faucet device 102 is a so-called single-lever faucet. The temperature of the spouted water can be adjusted by turning the lever handle 106 left and right. The amount of water spouted can be adjusted by turning the lever handle 106 up and down. A valve mechanism is built into the main body 104 that allows the temperature and amount of water spouted to be adjusted. This valve mechanism is well known.

[0022] Although not shown, a faucet fixture having the faucet device 102 has a hot water inlet pipe and a water inlet pipe. The hot water inlet pipe is connected to a pipe extending from a water heater, for example. The water inlet pipe is connected to a water supply pipe, for example, without passing through a water heater.

[0023] Heated hot water is introduced into the hot water inlet pipe. Heating is performed by a water heater. Unheated water is introduced into the water inlet pipe. The valve mechanism adjusts the mixing ratio of hot water and cold water. This mixing ratio achieves temperature control of the discharged water. In the following, heated hot water, unheated water, and their mixed liquid are also simply referred to as "water."

[0024] The water spouting head 108 has a water guide section 110, a switching section 112, an operation section 114, a water shape adjustment section 116, a display section 120, and a discharge port 122. In this embodiment, the operation section 114 is a push button. The water guide section 110 also functions as a grip section.

[0025] The water shape adjustment unit 116 can change the shape of the water being discharged (water shape). The water shape adjustment unit 116 has a water shape adjustment lever 118. The water shape can be changed by operating the water shape adjustment lever 118. Two or more water shapes can be selected by operating the water shape adjustment lever 118. In a configuration where two water shapes can be selected, it is preferable to be able to choose between straight water shape and shower water shape. In a configuration where three water shapes can be selected, it is preferable to be able to choose between straight water shape and first and second shower water shapes, which have different shower water discharge modes, and this configuration is adopted in this embodiment. The shower water discharge mode refers to the shower water discharge range, shower water discharge volume, shower water discharge force, etc.

[0026] The water discharge head 108 has 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 122. The state in which raw water is discharged is also referred to as the raw water discharge state. When the purified water flow path is selected, purified water is discharged from the discharge port 122. The state in which purified water is discharged is also referred to as the purified water discharge state.

[0027] The switching unit 112 has a switching mechanism that can switch between discharging purified water and discharging raw water by operating the operating unit 114. This switching mechanism makes it possible to select between a raw water discharging state and a purified water discharging state.

[0028] FIG. 2 is a front view of the water-spouting head 108. FIGS. 3(a) and 3(b) are cross-sectional views taken along line AA in FIG. 2. The difference between FIGS. 3(a) and 3(b) is the circumferential position (phase) of the water purification cartridge. In FIGS. 3(a) and 3(b), the operating unit 114 is in the extended position. FIGS. 4(a), 4(b), 5(a), and 5(b) are also cross-sectional views of the water-spouting head 108. FIG. 4(a) is a cross-sectional view taken along line aa in FIG. 4(b). FIG. 4(b) is a cross-sectional view taken along line bb in FIG. 4(a). In FIGS. 4(a) and 4(b), the operating unit 114 is in the extended position. FIG. 5(a) is a cross-sectional view taken along line aa in FIG. 5(b). FIG. 5(b) is a cross-sectional view taken along line bb in FIG. 5(a). In FIGS. 5(a) and 5(b), the operating unit 114 is in the pressed-in position. In addition, in Figures 4(a), 4(b), 5(a) and 5(b), lines visible in the background of the cross section are omitted.

[0029] The operating unit 114 functions as a switching button. When switching the flow path, the operating unit 114 is pressed. Each time the operating unit 114 is pressed, the flow path is switched between the raw water flow path and the purified water flow path. In other words, each time the operating unit 114 is pressed, the flow path is switched between the raw water discharge state and the purified water discharge state. The switching mechanism has an alternate operation type thrust lock mechanism. This thrust lock realizes the push button operation of the operating unit 114. Each time the push button 114 is pressed, it moves between the extended position and the retracted position. This switching mechanism is well known.

[0030] In this embodiment, raw water is discharged when the push button 114 is in the extended position, and purified water is discharged when the push button 114 is in the depressed position. Therefore, Figures 3(a), 3(b), 4(a), and 4(b) show the raw water discharge state, and Figures 5(a) and 5(b) show the purified water discharge state. Conversely, purified water may be discharged when the push button 114 is in the extended position, and raw water may be discharged when the push button 114 is in the depressed position.

[0031] The water spouting head 108 has a water purification cartridge PC1. The water purification cartridge PC1 is arranged inside the water conveying section 110. The water conveying section 110 has an outer cylinder section 124. The water purification cartridge PC1 is arranged inside the outer cylinder section 124.

[0032] A raw water flow path WG is formed on the outside of the water purification cartridge PC1. A purified water flow path WJ is formed inside the water purification cartridge PC1. When in the raw water discharge state, raw water that has passed through the raw water flow path WG passes through the raw water flow path WG in the switching mechanism and is discharged from the outlet 122. On the other hand, when in the purified water discharge state, the raw water is filtered by the permeation section 126 of the water purification cartridge PC1 as it passes from the outside to the inside of the water purification cartridge PC1, becoming purified water. The purified water passes through the purified water flow path WJ inside the water purification cartridge PC1 and the purified water flow path WJ in the switching mechanism and is discharged from the outlet 122. Note that this permeation section 126 is an example of a water purification function section.

[0033] The switching unit 112 of the water spouting head 108 has a first valve 130 and a second valve 132. Water spouting is switched by opening and closing the two valves.

[0034] As shown in FIG. 4(b), the first valve 130 has a valve seat 130a, a first valve body 130b, a ball holder 130c, and an elastic body 130d. The first valve 130 is a ball valve. The first valve body 130b is a ball. The valve seat 130a is the opening edge of a circular hole. The ball 130b is held by the ball holder 130c. The ball holder 130c is open downward. An elastic body 130d is disposed between the upper part of the ball holder 130c and the ball 130b. This elastic body 130d is a coil spring. The elastic body 130d constantly biases the ball 130b toward the valve seat 130a.

[0035] As shown in FIG. 5(b), the second valve 132 has a valve seat 132a, a second valve body 132b, a ball holder 132c, and an elastic body 132d. The second valve 132 is a ball valve. The second valve body 132b is a ball. The valve seat 132a is the opening edge of a circular hole. The ball 132b is held by the ball holder 132c. The ball holder 132c is open downward. An elastic body 132d is disposed between the upper part of the ball holder 132c and the ball 132b. This elastic body 132d is a coil spring. The elastic body 132d constantly biases the ball 132b toward the valve seat 132a.

[0036] Push button 114 is connected to ball holder 130c and ball holder 132c via the thrust lock mechanism. Ball holder 130c and ball holder 132c move together with push button 114. Ball 130b moves together with ball holder 130c, and ball 132b moves together with ball holder 132c. Valve seat 130a and valve seat 132a are aligned in a direction substantially perpendicular to the direction of movement of push button 114, but their positions are (slightly) different in the direction of movement.

[0037] 4(a) and 4(b), when the operating part 114 is in the extended position, the ball 132b fits into the valve seat 132a, and the second valve 132 is closed. At this time, the center of the ball 130b is offset from the center of the valve seat 130a, and the first valve 130 is open. In this state, raw water is discharged. The second valve 132 is a purified water shutoff valve that closes the purified water flow path.

[0038] 5(a) and 5(b), when the operating part 114 is in the pressed position, the ball 130b fits into the valve seat 130a, and the first valve 130 is closed. At this time, the center of the ball 132b is offset from the center of the valve seat 132a, and the second valve 132 is open. In this state, purified water is discharged. The first valve 130 is a raw water shutoff valve that closes the raw water flow path.

[0039] The water spout head 108 has a water purification cartridge mounting portion 134. The water purification cartridge mounting portion 134 has a cylindrical hollow portion 136 in which the middle portion of the water purification cartridge PC1 is disposed, and a connection receiving portion 138. The cylindrical hollow portion 136 is formed inside the outer tube portion 124. The connection receiving portion 138 is located downstream of the cylindrical hollow portion 136.

[0040] Fig. 6 is a perspective view of the water purification cartridge PC1. Fig. 7(a) is a side view of the water purification cartridge PC1, Fig. 7(b) is a front view of the water purification cartridge PC1, Fig. 7(c) is a cross-sectional view taken along line cc in Fig. 7(b), and Fig. 7(d) is a cross-sectional view taken along line dd in Fig. 7(b).

[0041] The water purification cartridge PC1 has an intermediate portion 150, a connecting end portion 152 disposed at the front end of the intermediate portion 150, and a rear forming portion 154 disposed at the rear end of the intermediate portion 150. The connecting end portion 152 is coaxial with the intermediate portion 150. The rear forming portion 154 is coaxial with the intermediate portion 150.

[0042] The connection end 152 is provided downstream of the intermediate section 150. The connection end 152 has a hollow interior. This hollow functions as the purified water flow path WJ. That is, the connection end 152 has the purified water flow path WJ therein. The connection end 152 is made of resin. The connection end 152 is integral as a whole. The connection end 152 is integrally molded from resin. The connection end 152 may be formed by combining multiple components that have been molded separately.

[0043] The intermediate section 150 is cylindrical. The intermediate section 150 has a permeation section 151 that allows water to pass through. The intermediate section 150 has a filtering function. The intermediate section 150 has a hollow section therein. This hollow section functions as the purified water flow path WJ. The intermediate section 150 may have, for example, an outer filtration layer and an inner filtration layer. A water purification material may be disposed between the outer filtration layer and the inner filtration layer. The water purification material may be mainly composed of, for example, activated carbon. The outer filtration layer and the inner filtration layer may be made of, for example, nonwoven fabric. The outer filtration layer and / or the inner filtration layer may be made of ceramic having sterilizing properties. An ion exchanger may be used for the outer filtration layer and / or the inner filtration layer. The outer filtration layer may have multiple layers. The inner filtration layer may have multiple layers. Note that the intermediate section 150 of this embodiment is an example of a water purification function section (a section that exhibits a water purification function). The intermediate section 150 does not necessarily have a filtering function. The middle section 150 may be a water-impermeable cylindrical wall.

[0044] The water purification cartridge PC1 of this embodiment has a purification material capable of removing chlorine. An example of this purification material is activated carbon.

[0045] The rear forming portion 154 closes the rear side of the intermediate portion 150. On the other hand, water can pass through the connecting end portion 152. The internal space of the connecting end portion 152 is the purified water flow path WJ. The purified water generated after passing through the intermediate portion 150 passes through the connecting end portion 152 and reaches the switching portion 112.

[0046] The rear forming portion 154 may be water-permeable. For example, raw water may flow into the middle portion 150 from a through-hole provided in the rear forming portion 154 of the water purification cartridge PC1. In this case, the middle portion 150 may be a water-impermeable cylindrical wall portion.

[0047] The connection end 152 has a first cylindrical portion 160. The connection end 152 further has a second cylindrical portion 162. The connection end 152 further has a third cylindrical portion 164. The connection end 152 further has a holding cylindrical portion 166. The first cylindrical portion 160 is located downstream of the second cylindrical portion 162. The second cylindrical portion 162 is located downstream of the third cylindrical portion 164. The third cylindrical portion 164 is located downstream of the holding cylindrical 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 and the second cylindrical portion 162 are coaxial. The second cylindrical portion 162 and the third cylindrical portion 164 are coaxial. The third cylindrical portion 164 and the holding cylindrical portion 166 are coaxial. The center line of the first cylindrical portion 160 coincides with the center line z1 of the water purification cartridge PC1. The center line of the second cylindrical portion 162 coincides with the center line z1 of the water purification cartridge PC1. The center line of the third cylindrical portion 164 coincides with the center line z1 of the water purification cartridge PC1. The center line of the holding cylindrical portion 166 coincides with the center line z1 of the water purification cartridge PC1.

[0048] The connection end portion 152 has a first annular packing s1 and a second annular packing s2. In this embodiment, the first annular packing s1 is an O-ring. In this embodiment, the second annular packing s2 is an O-ring.

[0049] The connecting end portion 152 has a maximum outer diameter portion. In this embodiment, the maximum outer diameter portion of the connecting end portion 152 is a holding cylindrical portion 166. This maximum outer diameter portion (holding cylindrical portion 166) covers the downstream end portion of the intermediate portion 150. This maximum outer diameter portion (holding cylindrical portion 166) holds the downstream end portion of the intermediate portion 150.

[0050] The outer diameter of the first cylindrical portion 160 is smaller than the outer diameter of the 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 outer diameter of the third cylindrical portion 164 is smaller than the outer diameter of the holding cylindrical portion 166.

[0051] The connecting end portion 152 has a first annular packing s1 and a second annular packing s2. The first annular packing s1 is disposed in the first cylindrical portion 160. The second annular packing s2 is disposed in the second cylindrical portion 162.

[0052] Fig. 8 is a partially enlarged view of Fig. 7(c), and Fig. 9 is a partially enlarged view of Fig. 7(d).

[0053] The first cylindrical portion 160 constitutes the downstream end of the connection end portion 152. The first cylindrical portion 160 constitutes the downstream end of the water purification cartridge PC1.

[0054] The first cylindrical portion 160 constitutes the downstream end of the water purification cartridge PC1. The first cylindrical portion 160 constitutes the downstream end of the connecting end portion 152.

[0055] The connection end portion 152 has a tip portion 170. In this embodiment, the first cylindrical portion 160 is the tip portion 170. The tip portion 170 has a first groove 172. The first groove 172 is formed on the outer peripheral surface of the tip portion 170 (first cylindrical portion 160). The first groove 172 is a circumferential groove. The first groove 172 is formed between a front wall portion 173a and a rear wall portion 173b. The front wall portion 173a forms the front side surface of the first groove 172. The rear wall portion 173b forms the rear side surface of the first groove 172.

[0056] The first annular packing s1 is disposed at the tip end portion 170. The first annular packing s1 is disposed in the first groove 172.

[0057] The tip portion 170 has a tip surface 174. The tip surface 174 is the tip surface of the water purification cartridge PC1. The tip surface 174 is the tip surface of the connection end portion 152. The tip surface 174 is flat. The tip surface 174 extends along the radial direction. The tip surface 174 is annular (see Figure 7(b)). The tip surface 174 is provided over the entire circumferential direction. The center of the tip surface 174 is located on the center line z1 of the water purification cartridge PC1.

[0058] The tip portion 170 is impermeable to water. The inner surface of the tip portion 170 faces the purified water flow path WJ. In this embodiment, the inner surface of the tip portion 170 includes the inner surface 194 described below. The outer surface of the tip portion 170 faces the raw water flow path WG. In this embodiment, the outer surface of the tip portion 170 includes a tip surface 174 and a recess 176. The outer surface of the tip portion 170 has a recess 176. The inner and outer surfaces of the tip portion 170 are separated by a first annular gasket s1. The center line of the tip portion 170 coincides with the center line z1 of the water purification cartridge PC1. The tip portion 170 is positioned at a position that intersects with the center line z1 of the water purification cartridge PC1.

[0059] The recess 176 is open to the downstream side. The recess 176 is open axially forward. The recess 176 is open to the raw water flow path WG. The recess 176 is water-impermeable. The cross-sectional shape of the recess 176 is circular (see Figure 7(b)). The tip surface 174 is arranged around (radially outward from) the recess 176. The recess 176 forms a cavity inside the tip portion 170. The recess 176 forms a cylindrical cavity. The cavity formed by the recess 176 exists radially inward of the first annular gasket s1. The cavity formed by the recess 176 exists radially inward of the first groove 172. The center line of the tip surface 174 coincides with the center line z1 of the water purification cartridge PC1.

[0060] As shown in Figures 8 and 9, the recess 176 has a side surface 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 groove 172. The bottom surface 180 is flat. The bottom surface 180 extends along the radial direction. The bottom surface 180 is circular. The center of the bottom surface 180 is located on the center line z1 of the water purification cartridge PC1.

[0061] A cavity is formed by the recessed portion 176 on the radially inner side of the first groove 172. A cavity is formed by the recessed portion 176 on the radially inner side of the bottom surface 172a.

[0062] The tip portion 170 has a partition wall 190. The partition wall 190 is water-impermeable. The partition wall 190 is located upstream of the tip surface 174. The partition wall 190 extends in the radial direction. The center line of the partition wall 190 coincides with the center line z1 of the water purification cartridge PC1.

[0063] The partition wall 190 intersects with the center line z1 of the water purification cartridge PC1. That is, the partition wall 190 is provided at a position where it intersects with the center line z1 of the water purification cartridge PC1. In this embodiment, the partition wall 190 intersects with the center line z1 of the water purification cartridge PC1 at its center. The partition wall 190 may intersect with the center line z1 of the water purification cartridge PC1 at a position other than its center. The partition wall 190 forms the bottom surface 180 of the recess 176. The bottom surface 180 is the outer surface 192 of the partition wall 190. In this way, the outer surface of the tip portion 170 has a recess 176 whose bottom surface 180 is the outer surface 192 of the partition wall 190.

[0064] The partition wall 190 separates the inside and outside of the water purification cartridge PC1. An outer surface 192 of the partition wall 190 forms the outer surface of the water purification cartridge PC1. The outer surface 192 faces the raw water flow path WG. An inner surface 194 of the partition wall 190 forms the inner surface of the water purification cartridge PC1. The inner surface 194 faces the purified water flow path WJ.

[0065] The connection end 152 has a connecting extension portion 200. The connecting extension portion 200 connects the first cylindrical portion 160 and the second cylindrical portion 162. As shown in Figures 6 and 7(b), multiple connecting extension portions 200 are arranged at equal intervals in the circumferential direction. In this embodiment, four connecting extension portions 200 are arranged at equal intervals in the circumferential direction. The connecting extension portions 200 extend in a direction inclined with respect to the center line z1 of the water purification cartridge PC1. The connecting extension portions 200 extend radially inward as they extend downstream. The connecting extension portion 200 connects the downstream side of the second cylindrical portion 162 and the upstream side of the first cylindrical portion 160.

[0066] The second cylindrical portion 162 has a second groove 210. The second groove 210 is a circumferential groove. The second groove 210 is formed on the outer circumferential surface of the second cylindrical portion 162. A second annular gasket s2 is disposed in the second groove 210. The interior of the second cylindrical portion 162 is hollow. The interior of the second cylindrical portion 162 is the purified water flow path WJ.

[0067] The second cylindrical portion 162 has a downstream end surface 212. The downstream end surface 212 is a flat surface. The downstream end surface 212 extends along the radial direction. The downstream end surface 212 is annular. The downstream end surface 212 is formed over the entire circumferential direction.

[0068] The downstream end surface 212 may be formed continuously and without interruption in the entire circumferential direction. The downstream end surface 212 may be formed by partitioned portions separated by the connecting extension portions 200 lined up in the circumferential direction. The downstream end surface 212 may have a portion formed continuously and without interruption in the entire circumferential direction, and a portion where partitioned portions separated by the connecting extension portions 200 are lined up in the circumferential direction. In this embodiment, the downstream end surface 212 is formed by four partitioned portions 214 separated by the connecting extension portions 200 lined up in the circumferential direction.

[0069] The connecting extension portion 200 has an extension portion downstream surface 202. The extension portion downstream surface 202 is the downstream surface of the connecting extension portion 200. The extension portion downstream surface 202 has a configuration 1 in which it extends radially inward as it goes downstream. With this configuration 1, when the connection end portion 152 of the water purification cartridge PC1 is inserted into the connection receiving portion 138 of the water purification cartridge mounting portion 134 of the water spouting head 108, the portion of the connection receiving portion 138 that comes into contact with the extension portion downstream surface 202 is displaced in a direction in which the center line of the connection end portion 152 and the center line of the connection receiving portion 138 coincide with each other. As a result, damage to the connection end portion 152 and each portion of the connection receiving portion 138 can be prevented, and effect 1 is achieved in which operability is improved when inserting the connection end portion 152 of the water purification cartridge PC1 into the connection receiving portion 138 of the water purification cartridge mounting portion 134 of the water spouting head 108.

[0070] On the other hand, the downstream end surface 212 has configuration 2, which is a surface that extends radially, i.e., perpendicular to the axial direction. The water spouting head 108 has a pressing portion that is pressed by the water purification cartridge PC1 when the connection end 152 of the water purification cartridge PC1 is inserted into the connection receiving portion 138, and a water purification function-equipped water spouting head, water purification cartridge, and faucet device can be conceived in which a specific function is achieved by pressing this pressing portion. Examples of this specific function include switching the water spouting state (raw water / purified water) and controlling the switching of the water spouting form. In this case, Effect 2 is achieved by the surface of the connection end portion that presses the pressing portion extending radially, i.e., being a surface perpendicular to the axial direction, which allows the pressing portion to be pressed accurately and / or effectively. Effect 2 is achieved by the downstream end surface 212 extending radially.

[0071] Although the above-mentioned configuration 1 and the above-mentioned configuration 2 are arranged in the same axial region of the connection end 152, it is possible to achieve both effect 1 and effect 2. Furthermore, because both configurations are arranged in the same axial region of the connection end 152, it is possible to prevent the water spout head with water purification function, the water purification cartridge, and the faucet device from becoming larger, and to increase the area in which the purification function unit can be arranged.

[0072] The third cylindrical portion 164 has a circumferential surface 220 and a stepped surface 222. The circumferential surface 220 is a circumferential surface. The center line of the circumferential surface 220 is the center line z1 of the water purification cartridge PC1. The stepped surface 222 is a flat surface. The stepped surface 222 extends in the radial direction. The stepped surface 222 is annular. The stepped surface 222 is formed over the entire circumferential direction. The interior of the third cylindrical portion 164 is the purified water flow path WJ.

[0073] The holding cylindrical portion 166 has a circumferential surface 230 and a stepped surface 232. The circumferential surface 230 is a circumferential surface. The center line of the circumferential surface 230 is the center line z1 of the water purification cartridge PC1. The stepped surface 232 is a flat surface. The stepped surface 232 extends along the radial direction. The stepped surface 232 is annular. The stepped surface 232 is formed over the entire circumferential direction. The stepped surface 232 connects the upstream side of the circumferential surface 220 and the downstream side of the circumferential surface 230.

[0074] The connection end 152 has a purified water outlet hole 240. The first annular packing s1 is located downstream of the purified water outlet hole 240. The second annular packing s2 is located upstream of the purified water outlet hole 240. The purified water outlet hole 240 is located between the first cylindrical portion 160 (tip portion 170) and the second cylindrical portion 162. The first cylindrical portion 160 is spaced apart from the second cylindrical portion 162, and this separation forms the purified water outlet hole 240. The purified water outlet hole 240 is formed between circumferentially adjacent connecting extension portions 200.

[0075] Figure 10 is a partially enlarged view of Figure 3(b). Figure 10 is an enlarged view of the vicinity of the connection end 152. As mentioned above, the water purification cartridge mounting portion 134 of the water spouting head 108 has a connection receiving portion 138. The connection receiving portion 138 has a first receiving cylindrical portion 254 and a second receiving cylindrical portion 256. The first receiving cylindrical portion 254 is located downstream of the second receiving cylindrical portion 256. The first receiving cylindrical portion 254 is located downstream of the second receiving cylindrical portion 256. The inner diameter of the first receiving cylindrical portion 254 is smaller than the inner diameter of the second receiving cylindrical portion 256. The outer diameter of the first receiving cylindrical portion 254 is smaller than the inner diameter of the second receiving cylindrical portion 256.

[0076] The connection end 152 is watertightly connected to the connection receiving portion 138. A first annular packing s1 and a second annular packing s2 ensure watertightness. The first cylindrical portion 160 (tip portion 170) of the connection end 152 is inserted into the inside of the first receiving cylindrical portion 254. The first annular packing s1 is in close contact with the inner circumferential surface of the first receiving cylindrical portion 254. The second cylindrical portion 162 of the connection end 152 is inserted into the inside of the second receiving cylindrical portion 256. The second annular packing s2 is in close contact with the inner circumferential surface of the second receiving cylindrical portion 256. The end face 258 of the second receiving cylindrical portion 256 abuts against the stepped surface 222. This abutment positions the water purification cartridge PC1 in the axial direction.

[0077] The connection receiving portion 138 has a purified water passage WJ1 that separates the purified water exiting the purified water outlet hole 240 from the raw water passage WG and forms part of the purified water passage WJ (see Figures 5(b) and 10). The connection receiving portion 138 also has a raw water passage WG1 that separates the raw water from the purified water passage WJ1 and forms part of the raw water passage WG (see Figures 4(a) and 10). The connection receiving portion 138 has a partition wall 260 that forms the raw water passage WG1 (see Figure 10). The partition wall 260 is connected to the downstream end of the first cylindrical receiving portion 254. The partition wall 260 is located downstream of the recess 176. The partition wall 260 extends radially. The partition wall 260 forms the raw water passage WG1 between the partition wall 260 and the recess 176. The raw water passage WG1 forms the raw water passage WG that penetrates in the left-right direction (see Figure 4(a)). The raw water passage WG1 guides raw water to the tip surface 174 of the water purification cartridge PC1. The raw water passage WG1 guides the raw water to the recess 176. The tip surface 174 faces the raw water flow path WG. The recess 176 faces the raw water flow path WG. The first annular gasket s1 and the second annular gasket s2 prevent the purified water that comes out of the purified water outlet hole 240 from flowing into the raw water flow path WG. The first annular gasket s1 prevents water from the raw water passage WG1 from flowing into the purified water flow path WJ. The second annular gasket s2 prevents water from the raw water flow path WG from flowing into the outlet of the purified water outlet hole 240. The second annular gasket s2 prevents the purified water that comes out of the purified water outlet hole 240 from flowing into the raw water flow path WG.

[0078] A water-permeable member 270 is installed downstream of the recess 176 (see FIG. 10 ). The water-permeable member 270 is arranged facing the tip surface 174. The water-permeable member 270 is installed facing the raw water passage WG1. The water-permeable member 270 is arranged between the raw water passage WG1 and the tip surface 174. The water-permeable member 270 is arranged between the raw water passage WG1 and the recess 176. In this embodiment, the water-permeable member 270 is a net. This net is a metal net (mesh metal net). The water-permeable member 270 does not obstruct the flow of water in the raw water flow path WG. The water flow in the raw water passage WG1 can hit the tip surface 174. The water flow in the raw water passage WG1 can flow into the recess 176. The water-permeable member 270 can prevent foreign matter from entering the raw water passage WG1.

[0079] Figure 11 is a partially enlarged view of Figure 5(b). The purified water outlet hole 240 of the water purification cartridge PC1 has an outlet opening edge 242. The outlet opening edge 242 has a radially inner edge 242a and a radially outer edge 242b. The radially inner edge 242a is generally circular. The center of the radially inner edge 242a is located on the center line z1 of the water purification cartridge PC1. The radially outer edge 242b is generally circular. The center of the radially outer edge 242b is located on the center line z1 of the water purification cartridge PC1. The radially inner edge 242a is located radially inward from the radially outer edge 242b. The radially inner edge 242a is located downstream from the radially outer edge 242b.

[0080] The dashed line in Figure 11 represents a straight line L1 connecting the radially inner edge 242a and the radially outer edge 242b. The two-dot chain line in Figure 11 represents a straight line L2 perpendicular to the straight line L1. The straight line L2 is inclined radially outward as it approaches the downstream side. The double-headed arrow θ in Figure 11 represents the angle between the center line z1 of the water purification cartridge PC1 and the straight line L2. This angle θ is also referred to as the opening inclination angle.

[0081] In Figure 11, the double-headed arrow S1 indicates the radial opening width of the outlet opening edge 242 of the purified water outlet hole 240. The outlet opening edge 242 has a radial opening width S1. The radial opening width S1 is the radial distance between the radial inner edge 242a and the radial outer edge 242b. In Figure 11, the double-headed arrow V indicates the axial width of the outlet opening edge 242. The outlet opening edge 242 has an axial width V. The axial width V is the axial distance between the radial inner edge 242a and the radial outer edge 242b.

[0082] The purified water outlet hole 240 penetrates in the axial direction. In other words, the purified water outlet holes 240 are connected in the axial direction. FIG. 12 is an enlarged cross-sectional view of a portion of FIG. 11. In a cross section taken along the center line z1, the purified water outlet hole 240 allows a straight line X extending in the axial direction to pass through (see arrow y1 in FIG. 12). In a cross section taken along the center line z1, the purified water outlet hole 240 has, as the straight line X, a straight line X1 located at the radially outermost position and a straight line X2 located at the radially innermost position. The straight lines X1 and X2 are separated radially. That is, there is a radial distance between the straight lines X1 and X2. This radial distance is also referred to as the front-rear through width. The purified water outlet hole 240 has a front-rear through width S2. In this embodiment, the front-rear through width S2 is equal to the radial opening width S1.

[0083] In FIG. 9, the double-headed arrow M1 indicates the width of the first groove 172. The groove width M1 (mm) is measured along the axial direction. In FIG. 9, the double-headed arrow M2 indicates the width of the second groove 210. The groove width M2 (mm) is measured along the axial direction. The groove width M1 is larger than the groove width M2.

[0084] In the present application, the cross-sectional diameter of the first annular packing s1 is referred to as the cross-sectional diameter D1 (mm), and the cross-sectional diameter of the second annular packing s2 is referred to as the cross-sectional diameter D2 (mm). Note that the cross-sectional diameter D1 is the diameter of the first annular packing s1 alone. That is, the cross-sectional diameter D1 is measured in a state where no external force is applied to the first annular packing s1. Similarly, the cross-sectional diameter D2 is the diameter of the second annular packing s2 alone. That is, the cross-sectional diameter D2 is measured in a state where no external force is applied to the second annular packing s2.

[0085] The cross-sectional diameter D1 is smaller than the cross-sectional diameter D2. The cross-sectional diameter D1 is smaller than the groove width M1. The cross-sectional diameter D2 is smaller than the groove width M2.

[0086] 9, the groove width M1 is larger than the cross-sectional diameter D1 of the first annular packing s1. In the first groove 172, the first annular packing s1 has an axial gap. In the first groove 172, the first annular packing s1 can move in the axial direction.

[0087] The bottom surface 172a of the first groove 172 is a circumferential surface as a whole and has a diameter. The diameter of the bottom surface 172a varies depending on the axial position. In this embodiment, the diameter of the bottom surface 172a is smaller on the downstream side than on the upstream side. In FIG. 9, the first annular packing s1 is located at the most upstream side within the first groove 172. When the first annular packing s1 moves downstream within the first groove 172, the compression of the first annular packing s1 is relaxed. Furthermore, when the first annular packing s1 moves downstream within the first groove 172, the inner diameter of the first annular packing s1 decreases, and the outer diameter also decreases. The movement of the first annular packing s1 downstream facilitates removal of the water purification cartridge PC1.

[0088] 9, the groove width M2 is larger than the cross-sectional diameter D2 of the second annular packing s2. In the second groove 210, the first annular packing s1 has an axial gap. In the second groove 210, the second annular packing s2 can move in the axial direction.

[0089] The bottom surface 210a of the second groove 210 is generally circumferential and has a diameter. The diameter of the bottom surface 210a is larger than the diameter of the bottom surface 172a. The diameter of the bottom surface 210a does not change with axial position. The diameter of the bottom surface 210a is constant. In FIG. 9, the second annular packing s2 is located at the most upstream position within the second groove 210. Even if the second annular packing s2 moves axially within the second groove 210, the compression degree of the second annular packing s2 does not change.

[0090] In FIG. 9, the double-headed arrow G1 indicates the outer diameter of the first annular packing s1. The outer diameter G1 is measured when the first annular packing s1 is attached to the first groove 172 and the water purification cartridge PC1 is not attached to the water-spouting head 108. In other words, the outer diameter G1 is measured when the water purification cartridge PC1 is alone. In FIG. 9, the double-headed arrow G2 indicates the outer diameter of the second annular packing s2. The outer diameter G2 is measured when the second annular packing s2 is attached to the second groove 210 and the water purification cartridge PC1 is not attached to the water-spouting head 108. In other words, the outer diameter G2 is measured when the water purification cartridge PC1 is alone. Note that when the diameter of the bottom surface of the groove varies, such as the bottom surface 172a of the first groove 172, the outer diameters G1 and G2 of the annular packings are measured when the annular packing is positioned at the position where the outer diameter of the bottom surface of the groove is greatest.

[0091] The outer diameter G1 of the first annular packing s1 is smaller than the outer diameter G2 of the second annular packing s2.

[0092] In FIG. 9, the double-headed arrow W1 indicates the width obtained by subtracting the cross-sectional diameter D1 from the groove width M1. That is, W1 = M1 - D1. In FIG. 9, the double-headed arrow W2 indicates the width obtained by subtracting the cross-sectional diameter D2 from the groove width M2. W2 = M2 - D2. Note that the first annular packing s1 and the second annular packing s2 in FIG. 9 are in the installed state and therefore compressed. Therefore, the cross-sectional width of the first annular packing s1 in FIG. 9 is not, precisely, the cross-sectional diameter D1. Similarly, the cross-sectional width of the second annular packing s2 in FIG. 9 is not the cross-sectional diameter D2. From this perspective, it is inappropriate to illustrate the widths W1 and W2 in FIG. 9, but for clarity, the widths W1 and W2 are illustrated in FIG. 9. Similarly, it is inappropriate to illustrate the cross-sectional diameters D1 and D2 in FIG. 9, but for clarity, the cross-sectional diameters D1 and D2 are illustrated in FIG. 9.

[0093] Width W1 is greater than width W2, in other words, the difference (M1-D1) is greater than the difference (M2-D2).

[0094] In the sealing portion sealed by the annular packing, calcium, dirt, etc. contained in water accumulate, causing the annular packing to adhere. In addition, the annular packing constantly exposed to water swells, and this swelling can also promote the above adhesion. Due to this adhesion, it becomes difficult to remove the water purification cartridge PC1 from the connection receiving portion 138. Also, since a large force is required for removal, a load is applied to the annular packing, and the deterioration of the annular packing can be promoted.

[0095] By providing the width W1 and the width W2, when removing the water purification cartridge PC1, the deformation of the annular packings s1, s2 becomes easy. Therefore, the removability is improved. Also, the annular packings s1, s2 can move within the groove. Thus, the adhered portion is peeled off step by step, and the removability is improved.

[0096] This embodiment has the following effects.

[0097] [Effect of G1 < G2] In the water purification cartridge PC1, the outer diameter G1 of the first annular packing s1 located on the downstream side is smaller than the outer diameter G2 of the second annular packing s2 located on the upstream side (see FIG. 9).

[0098] This configuration improves the above-mentioned improvement target 1. Since the outer diameter G1 of the first annular packing s1 on the downstream side is small, the probability of rubbing against the edge 259 of the second receiving cylinder portion 256 is low (see FIG. 10). Therefore, unlike the prior art (FIG. 13), it is almost never rubbed twice in one insertion. For this reason, the damage to the first annular packing s1 on the downstream side is suppressed (packing damage suppression effect).

[0099] Furthermore, this configuration improves Improvement Target 2 described above. Since the outer diameter G1 of the first annular packing s1 is small, the outer diameter of the first cylindrical portion 160 in which the first annular packing s1 is disposed is also small (see Fig. 7(a)). Therefore, even if the center line z1 of the water purification cartridge PC1 is inclined at the initial stage of inserting the water purification cartridge PC1, the probability that the first cylindrical portion 160 hits the inner surface of the second receiving cylindrical portion 256 is low (see Fig. 10). For this reason, damage to the inner surface of the connection receiving portion 138 is suppressed (reception portion damage suppression effect).

[0100] Furthermore, with the configuration of G1 < G2, it becomes easier to incline the straight line L2 (Fig. 11), which is the direction of the water purification outlet hole 240, and it also becomes easier to penetrate the water purification outlet hole 240 in the axial direction. Therefore, this configuration also contributes to the improvement of Improvement Target 3 and Improvement Target 4.

[0101] If the outer diameter G1 of the first annular packing s1 is too small, the strength of the tip portion 170 of the water purification cartridge PC1 tends to decrease, and the watertightness at the first annular packing s1 also tends to decrease. From this perspective, the outer diameter G1 is preferably 7 mm or more, more preferably 9 mm or more, and still more preferably 10 mm or more. If the outer diameter G1 is too large, the water purification cartridge PC1 and the water discharge head 108 become large, and the faucet tends to become large. From this perspective, the outer diameter G1 is preferably 18 mm or less, more preferably 15 mm or less, and still more preferably 13 mm or less. In the above embodiment, the outer diameter G1 is 11 mm.

[0102] If the outer diameter G2 of the second annular packing s2 is too small, the flow rate of the purified water tends to decrease. From this perspective, the outer diameter G2 is preferably 12 mm or more, more preferably 14 mm or more, and still more preferably 16 mm or more. If the outer diameter G2 is too large, the water purification cartridge PC1 and the water discharge head 108 become large, and the faucet tends to become large. From this perspective, the outer diameter G2 is preferably 25 mm or less, more preferably 23 mm or less, and still more preferably 21 mm or less. In the above embodiment, the outer diameter G2 is 18.8 mm.

[0103] [[ID=B]] If the difference (G2-G1) is too small, the aforementioned effects of preventing damage to the gasket and the receiving portion will be reduced, and the improvement effects of improvement target 3 and improvement target 4 may also be reduced. Furthermore, if the difference (G2-G1) is too small, the flow rate of purified water is likely to decrease. From these perspectives, the difference (G2-G1) is preferably 3 mm or more, more preferably 4 mm or more, and even more preferably 6 mm or more. If the difference (G2-G1) is too large, the water purification cartridge PC1 and the water discharge head 108 will become larger, and the faucet will likely become larger. From this perspective, the difference (G2-G1) is preferably 15 mm or less, more preferably 12 mm or less, and even more preferably 10 mm or less. In the above embodiment, the difference (G2-G1) is 7.8 mm.

[0104] If the ratio (G2 / G1) is too small, the aforementioned effects of preventing damage to the packing and receiving portion will be reduced, and the improvement effects of improvement target 3 and improvement target 4 may also be reduced. Furthermore, if G2 / G1 is too small, the flow rate of purified water is likely to decrease. From this perspective, G2 / G1 is preferably 1.2 or more, more preferably 1.3 or more, and even more preferably 1.5 or more. If G2 / G1 is too large, the water purification cartridge PC1 and the water discharge head 108 will become larger, and the faucet will likely become larger. From this perspective, G2 / G1 is preferably 2.5 or less, more preferably 2.3 or less, and even more preferably 1.9 or less. In the above embodiment, G2 / G1 is 1.7.

[0105] [Effect of opening angle θ] As shown in FIG. 11, the purified water outlet hole 240 (outlet opening edge 242) has an opening inclination angle θ.

[0106] This opening inclination angle θ improves the aforementioned improvement target 3. The opening inclination angle θ allows purified water to flow diagonally forward through the purified water outlet hole 240 while suppressing the axial length of the purified water outlet hole 240. Because the axial length of the purified water outlet hole 240 is suppressed, the overall length of the water purification cartridge PC1 is prevented from increasing and the water purification performance (length of the water purification material) is prevented from being sacrificed (axial length suppression effect). Furthermore, because the purified water is discharged diagonally forward from the purified water outlet hole 240, it is prevented from hitting the surface of the flow path forming member perpendicularly, and flow path resistance can be reduced (flow path resistance reduction effect).

[0107] Furthermore, the opening inclination angle θ improves the aforementioned improvement target 4. In the embodiment shown in FIG. 13 , water is less likely to flow into the gap 19 between the radial tip 17 of the wall portion located upstream of the downstream O-ring 13a and the opposing member. This is because the extension direction of the gap 19 is axial, while the direction of the water flow adjacent to the gap 19 is approximately radial (see the arrows in FIG. 13 ). Therefore, water is likely to stagnate in the gap 19, and limescale and dirt are likely to accumulate in the gap 19. In contrast, in the embodiment shown in FIG. 11 , the opening inclination angle θ is less than 90°, and this angle θ can cause a water flow that flows diagonally forward from the purified water outlet hole 240 (see arrow y2 in FIG. 12 ). This diagonally forward water flow includes a component that flows axially forward and is likely to flow into the gap 280 between the rear wall portion 173b and the first receiving cylindrical portion 254. Therefore, water is less likely to stagnate in the gap 280, and limescale and dirt are less likely to accumulate in the gap 280. As mentioned above, if there is sediment in the gap 280, the sediment is likely to be scraped out by the first annular packing s1 when the water purification cartridge PC1 is removed, and enter the purified water flow path WJ through the purified water outlet hole 240. However, in the gap 280, where water is less likely to stagnate, the sediment is suppressed, and the problem of the scraped-out sediment flowing into the purified water flow path WJ is suppressed (deposit suppression effect).

[0108] If the opening inclination angle θ is too small, the connection end 152 becomes long, and the axial length suppression effect is reduced. From this viewpoint, the opening inclination angle θ is preferably 30° or more, more preferably 40° or more, and even more preferably 50° or more. If the opening inclination angle θ is too large, the flow path resistance reduction effect and deposit suppression effect are reduced. From this viewpoint, the opening inclination angle θ is preferably 80° or less, more preferably 70° or less, and even more preferably 60° or less. In this embodiment, the opening inclination angle θ is 56°.

[0109] [Effect of axially penetrating purified water outlet holes] As mentioned above, the purified water outlet hole 240 penetrates in the axial direction (see arrow y1 in FIG. 12). This allows the water flow to easily enter the gap 280, further enhancing the aforementioned effect of suppressing deposits. In addition, because water passing through the purified water outlet hole 240 easily flows in the axial direction, the aforementioned effect of reducing flow path resistance is further enhanced.

[0110] If the front-rear through width S2 (see FIG. 12) is too small, the effect of suppressing deposits and the effect of reducing flow path resistance will decrease. From this viewpoint, the front-rear through width S2 is preferably 1.05 mm or more, and more preferably 1.1 mm or more. If the front-rear through width S2 is too large, the outer diameter G2 of the second annular gasket s2 will become large, and the water purification cartridge PC1 and the water spouting head 108 will become larger. Furthermore, if the outer diameter G2 becomes large, the watertightness provided by the second annular gasket s2 will likely decrease. From these viewpoints, the front-rear through width S2 is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less. In this embodiment, the front-rear through width S2 is 1.1 mm.

[0111] If the radial opening width S1 (see FIG. 11) is too small, the sediment suppression effect and the flow path resistance reduction effect will decrease. From this perspective, the radial opening width S1 is preferably 1.05 mm or more, and more preferably 1.1 mm or more. If the radial opening width S1 is too large, the outer diameter G2 of the second annular packing s2 will increase, and the water purification cartridge PC1 and the water discharge head 108 will become larger. Also, when the outer diameter G2 increases, the water tightness caused by the second annular packing s2 is likely to decrease. From these perspectives, the radial opening width S1 is preferably 5 mm or less, more preferably 3 mm or less, and even more preferably 2 mm or less. In the present embodiment, the radial opening width S1 is 1.1 mm.

[0112] [Effect of D1 < D2] As described above, the cross-sectional diameter D1 of the first annular packing s1 is smaller than the cross-sectional diameter D2 of the second annular packing s2.

[0113] When the outer diameter of the annular packing is small, it becomes difficult to perform operations such as stretching the annular packing, and the handling property of the annular packing decreases. For this reason, an annular packing with a small outer diameter is difficult to be mounted in the groove. That is, the mounting property of an annular packing with a small outer diameter is low, and the mounting property of an annular packing with a large outer diameter is high.

[0114] When the cross-sectional diameter of the annular packing is small, the annular packing is likely to stretch and is easy to be mounted in the groove. That is, the mounting property of an annular packing with a small cross-sectional diameter is high. An annular packing with a large cross-sectional diameter is difficult to stretch and has a low mounting property.

[0115] An annular packing with a small cross-sectional diameter has a small possible crushing allowance and a low sealing property. An annular packing with a large cross-sectional diameter can have a large crushing allowance, so the sealing property is high. Also, when the crushing allowance is large, it is easy to ensure the sealing property even if a manufacturing dimensional error of the peripheral member occurs.

[0116] In the above embodiment, the first annular packing s1 on the downstream side may have a reduced mounting property due to its small outer diameter G1. Therefore, the mounting property is improved by reducing the cross-sectional diameter D1.

[0117] On the other hand, the upstream second annular packing s2 has a large outer diameter G2, which allows for easy installation, and therefore the cross-sectional diameter D2 is increased to improve sealing performance.

[0118] From the viewpoint of sealing performance, the cross-sectional diameter D1 of the first annular packing s1 is preferably 1.0 mm or more, more preferably 1.2 mm or more, and even more preferably 1.3 mm or more. From the viewpoint of installation, the cross-sectional diameter D1 is preferably 2.0 mm or less, more preferably 1.9 mm or less, and even more preferably 1.7 mm or less. In the above embodiment, the cross-sectional diameter D1 is 1.5 mm.

[0119] From the viewpoint of sealing performance, the cross-sectional diameter D2 of the second annular packing s2 is preferably 1.3 mm or more, more preferably 1.5 mm or more, and even more preferably 1.7 mm or more. From the viewpoint of installation, the cross-sectional diameter D2 is preferably 3.0 mm or less, more preferably 2.5 mm or less, and even more preferably 2.3 mm or less. In the above embodiment, the cross-sectional diameter D2 is 1.9 mm.

[0120] If the cross-sectional diameter D2 is too small, the sealing performance of the second annular packing s2 is likely to deteriorate, and if the cross-sectional diameter D1 is too large, the installation performance of the first annular packing s1 is likely to deteriorate. In other words, if the cross-sectional diameter D2 is too small or the cross-sectional diameter D1 is too large, the overall performance of watertightness and installation performance is reduced. From this viewpoint, the difference (D2 - D1) is preferably 0.1 mm or more, more preferably 0.2 mm or more, and even more preferably 0.3 mm or more. If the cross-sectional diameter D2 is too large, the installation performance of the second annular packing s2 is likely to deteriorate, and if the cross-sectional diameter D1 is too small, the sealing performance of the first annular packing s1 is likely to deteriorate. In other words, if the cross-sectional diameter D2 is too large or the cross-sectional diameter D1 is too small, the overall performance of watertightness and installation performance is reduced. From this viewpoint, the difference (D2 - D1) is preferably 1.0 mm or less, more preferably 0.8 mm or less, and even more preferably 0.6 mm or less. In the above embodiment, the difference (D2-D1) is 0.4 mm.

[0121] If the cross-sectional diameter D2 is too small or the cross-sectional diameter D1 is too large, the overall performance of watertightness and ease of wearing will decrease. From this viewpoint, the ratio (D2 / D1) is preferably 1.05 or more, more preferably 1.1 or more, and even more preferably 1.2 or more. If the cross-sectional diameter D2 is too large or the cross-sectional diameter D1 is too small, the overall performance of watertightness and ease of wearing will decrease. From this viewpoint, the ratio (D2 / D1) is preferably 2.0 or less, more preferably 1.5 or less, and even more preferably 1.3 or less. In the above embodiment, the ratio (D2 / D1) is 1.27.

[0122] [Effect of W1>W2] As described above, the width W1 is greater than the width W2. In other words, the difference (M1-D1) is greater than the difference (M2-D2) (see FIG. 9).

[0123] The upstream second annular gasket s2 has a large cross-sectional diameter D2, making it prone to deformation when removing the water purification cartridge PC1. Therefore, the second annular gasket s2 is unlikely to be a factor that reduces removability. On the other hand, the downstream first annular gasket s1 has a small cross-sectional diameter D1, making it prone to deformation when removing the water purification cartridge PC1. Therefore, the first annular gasket s1 is likely to be a factor that reduces removability. Therefore, by making the width W1 of the first annular gasket s1, which is less prone to deformation, larger than the width W2, removability is improved. Note that increasing both the width W1 and the width W2 increases the axial length of the connection end 152, resulting in an increase in the length of the water purification cartridge PC1 or a decrease in water purification performance (the length of the water purification material). By making the width W2 smaller than the width W1, these disadvantages are suppressed.

[0124] From the viewpoint of ease of removal, the width W1 is preferably 0.7 mm or more, more preferably 0.9 mm or more, and even more preferably 1.1 mm or more. From the viewpoint of preventing the lengthening of the water purification cartridge PC1 and a decrease in water purification performance, the width W1 is preferably 2.0 mm or less, more preferably 1.8 mm or less, and even more preferably 1.5 mm or less. In this embodiment, the width W1 is 1.3 mm.

[0125] From the viewpoint of ease of removal, the width W2 is preferably 0.2 mm or more, more preferably 0.3 mm or more, and even more preferably 0.4 mm or more. From the viewpoint of preventing the lengthening of the water purification cartridge PC1 and a decrease in water purification performance, the width W2 is preferably 1.5 mm or less, more preferably 1.1 mm or less, and even more preferably 0.8 mm or less. In this embodiment, the width W2 is 0.6 mm.

[0126] To prevent an excessively small width W1 and an excessively large width W2, the difference (W1-W2) is preferably 0.1 mm or more, more preferably 0.3 mm or more, and even more preferably 0.5 mm or more. To prevent an excessively large width W1 and an excessively small width W2, the difference (W1-W2) is preferably 1.5 mm or less, more preferably 1.2 mm or less, and even more preferably 0.8 mm or less. In this embodiment, the difference (W1-W2) is 0.7 mm.

[0127] From the viewpoint of preventing an excessively small width W2 and an excessively large width W1, the ratio (W2 / W1) is preferably 0.2 or more, more preferably 0.3 or more, and even more preferably 0.4 or more. From the viewpoint of preventing an excessively large width W2 and an excessively small width W1, the ratio (W2 / W1) is preferably 0.9 or less, more preferably 0.8 or less, and even more preferably 0.6 or less. In this embodiment, the ratio (W2 / W1) is 0.46.

[0128] [Effect of recess] As described above, the outer surface of the tip portion 170 of the water purification cartridge PC1 has a recess 176 (see FIG. 9).

[0129] The first annular packing s1 is disposed in the tip portion 170, and therefore requires a certain axial length for the tip portion 170. The tip portion 170 also has a first groove 172, and the dimensional accuracy of its bottom surface 172a is an important factor for improving the sealing performance of the first annular packing s1.

[0130] If the inside of a packing arrangement portion having a predetermined axial length is solid, sink marks (mold shrinkage) during molding will be large. This phenomenon can occur with both thermoplastic resins and thermosetting resins. For example, sink marks can occur during cooling during injection molding of thermoplastic resins. For example, sink marks can occur during hardening of the resin during molding of thermosetting resins. Furthermore, if the inside of a packing arrangement portion having a predetermined axial length is solid, dimensional variation between individual pieces will be large.

[0131] By providing a cavity radially inward of the packing placement portion, the sink marks are suppressed and dimensional variations are also suppressed, thereby improving the dimensional accuracy of the bottom surface 172a of the first groove 172 and improving the sealing performance of the first annular packing s1.

[0132] The recess located radially inward of the packing arrangement portion can be provided on the outer surface of the tip portion 170 as in the water purification cartridge PC1, but can also be provided on the inner surface of the tip portion 170.

[0133] If a recess is provided on the inner surface of the tip portion 170, this recess will face the purified water flow path WJ. Purified water will flow into this recess and may stagnate. From a hygienic perspective, it is undesirable for purified water from which chlorine has been removed to stagnate in this recess. In contrast, in this embodiment, the recess 176 is provided on the outer surface of the tip portion 170. The recess 176 faces the raw water flow path WG. It is the raw water that stagnates in the recess 176. In this embodiment, a situation in which purified water from which chlorine has been removed stagnates in the recess is avoided.

[0134] Furthermore, if a recess is provided on the inner surface of the tip portion 170, the recess will complicate the shape of the flow path radially inside the purified water outlet hole 240, making turbulence more likely to occur. This turbulence can reduce the flow rate at the purified water outlet hole 240. Because the purified water passes through the water purification function section of the water purification cartridge PC1, the water pressure in the purified water flow path WJ is lower than the water pressure in the raw water flow path WG. If the flow rate at the purified water outlet hole 240 decreases due to the turbulence, the flow rate in the purified water flow path WJ will further decrease. In this embodiment, such a situation is avoided.

[0135] In FIG. 9, the double-headed arrow T indicates the shortest distance between the bottom surface 172a of the first groove 172 and the recess 176 (side surface 178). If the shortest distance T is too small, the strength may decrease and the sealing performance may decrease due to deformation of the bottom surface 172a. From this viewpoint, the shortest distance T is preferably 0.5 mm or more, more preferably 1.0 mm or more, and even more preferably 1.2 mm or more. If the shortest distance T is too large, the sink marks described above will become larger. From this viewpoint, the shortest distance T is preferably 3.0 mm or less, more preferably 2.0 mm or less, and even more preferably 1.8 mm or less. In the above embodiment, the shortest distance T is 1.5 mm.

[0136] When switching between the raw water discharge state and the purified water discharge state, the first valve 130 (raw water shutoff valve) or the second valve 132 (purified water shutoff valve) is momentarily closed. When switching from the raw water discharge state to the purified water discharge state, the raw water flow path WG, which has high water pressure, is momentarily shut off, so that water hammer or high water pressure is transmitted from the first valve 130 (raw water shutoff valve) to the upstream side of the raw water flow path WG.

[0137] As mentioned above, the outer surface of the tip portion 170 faces the raw water flow path WG (see FIG. 11). When this water hammer or high water pressure acts on the tip portion 170, the water purification cartridge PC1 can rock. This rocking can occur every time the water discharge mode is switched. This rocking can prevent the packings s1 and s2 from sticking.

[0138] As described above, the tip portion 170 is provided with a partition wall 190. The partition wall 190 is water-impermeable. The partition wall 190 is also provided at a position that intersects with the center line z1 of the water purification cartridge PC1. Therefore, water hammer or high water pressure acting on the partition wall 190 can effectively rock the water purification cartridge PC1. This can effectively prevent the packings s1 and s2 from sticking.

[0139] The partition wall 190 may extend radially, but does not have to extend radially. In the above embodiment, the partition wall 190 extends radially. This allows the water hammer or high water pressure acting on the partition wall 190 to be effectively converted into an axial force. This axial force can effectively swing the water purification cartridge PC1 in the axial direction (front-to-back direction).

[0140] The center line of the partition wall 190 preferably coincides with the center line z1 of the water purification cartridge PC1, but does not have to coincide with the center line z1 of the water purification cartridge PC1. In the above embodiment, the center line of the partition wall 190 coincides with the center line z1 of the water purification cartridge PC1. Therefore, pressure acting on the partition wall 190 can be effectively transmitted to the water purification cartridge PC1.

[0141] As described above, the outer surface of the tip portion 170 is provided with a recess 176. Compared to a flat surface without a recess, the recess 176 can efficiently capture water hammer or high water pressure. The recess 176 can promote the oscillation of the water purification cartridge PC1. Therefore, adhesion of the packings s1 and s2 can be effectively suppressed.

[0142] The raw water passage WG1 extends in the radial direction. The provision of the recess 176 can effectively capture the water flow in the raw water passage WG1 extending in the radial direction. The recess 176 can effectively capture water hammer or high water pressure in the raw water passage WG1 extending in the radial direction.

[0143] As shown in FIG. 8 , the recess 176 has a side surface 178 and a bottom surface 180. The bottom surface 180 extends in the radial direction. Therefore, water hammer or high water pressure acting on the bottom surface 180 can cause oscillation in the axial direction. The side surface 178 extends in the axial direction. Therefore, water hammer or high water pressure acting on the side surface 178 can cause oscillation in the radial direction. Oscillation in two directions can effectively prevent the packings s1 and s2 from sticking.

[0144] In the above embodiment, O-rings are used as the annular gaskets s1 and s2. The cross-sectional shape of the O-rings is circular. The cross-sectional shape of the annular gaskets does not have to be circular. For example, an O-ring with an elliptical cross-sectional shape may be used as the annular gaskets. The annular gaskets are not limited to O-rings. Furthermore, the cross-sectional shape of the annular gaskets is not limited. For example, a square gasket with a square cross-section, a U-gasket with a U-shaped cross-section, a V-gasket with a V-shaped cross-section, a Y-gasket with a Y-shaped cross-section, or an X-gasket with an X-shaped cross-section may be used as the annular gaskets. Note that O-rings are preferred from the overall perspective of preventing adhesion between the water purification cartridge and surrounding components and ensuring sealing properties (watertightness), and that an O-ring with a circular cross-section is particularly preferred.

[0145] The connection end 152 may be made of a resin or metal. When the material is metal, the connection end 152 is preferably manufactured by sintering, casting, or forging from the viewpoint of cost. Resin is more preferable than metal from the viewpoint of cost. Examples of the resin include thermoplastic resin and thermosetting resin. Thermoplastic resin is preferable because it is easy to mold. From the viewpoint of moldability, polyoxymethylene (POM), polyphenylene sulfide (PPS), acrylonitrile butadiene styrene copolymer (ABS), and polypropylene (PP) are more preferable. From the viewpoints of moldability and cost, acrylonitrile butadiene styrene copolymer (ABS) and polypropylene (PP) are particularly preferable.

[0146] Examples of materials for the tip portion 170 include resin and metal. From the viewpoint of cost, when the material is metal, the tip portion 170 is preferably manufactured by sintering, casting, or forging. From the viewpoint of cost, resin is more preferable than metal. Examples of such resins include thermoplastic resins and thermosetting resins. Thermoplastic resins that are easy to mold are preferred. From the viewpoint of moldability, polyoxymethylene (POM), polyphenylene sulfide (PPS), acrylonitrile butadiene styrene copolymer (ABS), and polypropylene (PP) are more preferable. From the viewpoints of moldability and cost, acrylonitrile butadiene styrene copolymer (ABS) and polypropylene (PP) are particularly preferable.

[0147] In the water purification cartridge PC1 of the above embodiment, the intermediate portion 150 has a permeable portion 151 that allows water to permeate from the outer peripheral surface of the water purification cartridge PC1 to the interior. The configuration of the intermediate portion 150 is not limited to this form. For example, the outer peripheral surface of the water purification cartridge PC1 may be formed with a water-impermeable outer peripheral wall, and a permeable portion may be provided inside this outer peripheral wall. In this case, water may be allowed to flow in from the rear end of the water purification cartridge PC1. For example, an inlet may be provided at the upstream end (rear end) of the water purification cartridge PC1. This inlet may be provided in the rear forming portion 154. Water flows into the water purification cartridge PC1 from this inlet, permeates the permeable portion, and reaches the connection end 152.

[0148] In the above embodiment, the water purification function unit is a permeation unit, and purified water is generated by passing raw water through this permeation unit. As described above, this permeation unit is merely one example of a water purification function unit. Purified water may also be generated without passing through the permeation unit. For example, purified water can also be generated by the water purification cartridge having a metal material, and the metal material releasing metal ions that have the effect of disinfecting, antibacterial, sterilizing, or inhibiting bacterial growth.

[0149] In this application, purified water is a concept that includes the following produced water (1) and (2). (1) Produced water in which substances or ions in the water have been removed using an adsorbent or filtration membrane. (2) Generated water that has been given beneficial functions by adding metal ions, electrons, substances, etc. to water, such as adding metal ions to water to give it antibacterial properties.

[0150] Specifically, the concept of purified water in this application includes water produced by the following function A and / or function B. In other words, the concept of water purification functional part in this application includes a functional part having the following function A and / or function B.

[0151] [Function A] Function A is one or more functions selected from the group consisting of A1, A2, A3, A4, and A5 below. A1: A function that uses adsorbents such as activated carbon to adsorb and remove substances from water. A2: The function of filtering substances in water using a filter medium. Preferably, the filter medium is a filter membrane such as a reverse osmosis membrane, ultrafiltration membrane, microfiltration membrane, nanofiltration membrane, or porous hollow fiber membrane, and the function of filtering substances in water using this filter membrane. A3: A function that uses ion exchange resins to capture and remove metal ions and other substances from water. A4: The function of releasing metal ions from metal materials that have the effect of disinfecting, antibacterial, sterilizing, and / or inhibiting the growth of bacteria. A5: A function that generates active oxygen by releasing metal ions from metal materials and absorbing the electrons generated by the release of these metal ions into oxygen in the water.

[0152] Examples of substances in water to be purified include chlorine, volatile organic compounds, pesticides, musty odor substances, heavy metals, etc. It is preferable to remove one or more substances selected from the group consisting of chlorine, volatile organic compounds, pesticides, musty odor substances, and heavy metals.

[0153] In this application, the term "chlorine" refers to a concept that includes residual chlorine in tap water. This residual chlorine includes free residual chlorine and combined residual chlorine. Examples of free residual chlorine include hypochlorous acid and hypochlorite ions. Examples of combined residual chlorine include monochloramine, dichloramine, and trichloramine. When chlorine gas is dissolved in water for the purpose of disinfecting the water, these residual chlorines can be generated.

[0154] Examples of the volatile organic compounds include chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1,1,1-trichloroethane, total trihalomethanes, etc. It is preferable to remove one or more compounds selected from the group consisting of chloroform, bromodichloromethane, dibromochloromethane, bromoform, tetrachloroethylene, trichloroethylene, 1,1,1-trichloroethane, and total trihalomethanes.

[0155] Examples of the pesticide include 2-chloro-4,6-bistylamino-1,3,5-triazine, etc. It is preferable to remove 2-chloro-4,6-bistylamino-1,3,5-triazine.

[0156] Examples of the musty odor substance include 2-methylisoborneol, geosmin, phenols, etc. It is preferable to remove one or more substances selected from the group consisting of 2-methylisoborneol, geosmin, and phenols.

[0157] Examples of the heavy metals include lead, mercury, copper, arsenic, cadmium, etc. It is preferable to remove one or more selected from the group consisting of lead, mercury, copper, arsenic, and cadmium.

[0158] Examples of the metal ion in function A4 include zinc ions and silver ions. It is preferable to release at least one ion selected from the group consisting of zinc ions and silver ions.

[0159] The bacteria in function A4 include Escherichia coli and Staphylococcus aureus, and also include various bacteria defined (inclusively) as general bacteria. It is preferable that one or more of these bacteria are disinfected, antibacterial, sterilized, or the growth of which is inhibited.

[0160] The active oxygen in the function A5 can decompose organic matter such as bacteria. Examples of such bacteria include Escherichia coli and Staphylococcus aureus, and also includes various bacteria that are defined (inclusively) as general bacteria. It is preferable that one or more of these bacteria are decomposed.

[0161] A water purification cartridge having function A1 is preferred from the viewpoint of being able to effectively remove chlorine and harmful substances and reducing the manufacturing cost of the water purification cartridge. A water purification cartridge may also be provided that has function A1 and one or more functions selected from functions A2, A3, A4, and A5.

[0162] [Function B] Function B is a function of purifying water using a filter material and / or medium specified in "6. Water Purifiers" in Appendix 2 (related to Article 2) of the Miscellaneous Industrial Products Quality Labeling Regulations (revised on March 30, 2017 / enforced on April 1, 2017). In other words, the water purification cartridge preferably has a water purification function part that purifies water using a filter material and / or medium specified in "6. Water Purifiers" in Appendix 2 (related to Article 2) of the Miscellaneous Industrial Products Quality Labeling Regulations (revised on March 30, 2017 / enforced on April 1, 2017).

[0163] The water purification function section having the function A and / or function B may constitute part of the water purification flow path, may be arranged within the water purification flow path, or may be arranged in a water reservoir section that flows through the water purification flow path.

[0164] The water purification cartridge may be an integrated type in which the entire cartridge is inseparably integrated, or a composite type made up of multiple components that can be separated from each other.

[0165] The combined type may have, for example, an adapter member and a cartridge body. The adapter member may be connectable to the cartridge body, or may not be connectable. In other words, the adapter member may be attachable to the cartridge body, or may not be attachable to the cartridge body. When the adapter member is attachable to the cartridge body, the adapter member may be detachably attached to the cartridge body, or may not be detachably attached to the cartridge body. The function of the adapter member is not limited. For example, the adapter member may have a function related to the operability of the operation unit (push button) 114.

[0166] The configuration of the adapter member and the cartridge body is not limited, and may be, for example, any of the following configurations B1 to B4. B1: A configuration in which the adapter member is attached to the cartridge body and then attached to the cartridge attachment section. B2: A configuration in which the adapter member is first attached to the cartridge attachment portion, and then the cartridge body is attached to the adapter member. B3: A configuration in which the adapter member is attached to one part of the cartridge mounting portion, and the cartridge body is attached to another part of the cartridge mounting portion. B4: A configuration in which the adapter member is first attached to a part of the cartridge mounting portion, and then the cartridge body is attached to the adapter member and the other part of the cartridge mounting portion.

[0167] In the above configurations B1 to B4, the adapter member may be configured to be removably attached to the cartridge mounting portion, or may be configured to be permanently attached. The adapter member is preferably removably attached to the cartridge mounting portion.

[0168] The following notes are provided regarding the above-described embodiments. [Appendix 1] A water purification cartridge to be placed in the water purification cartridge mounting portion of the water spout head with water purification function, A connection end portion is connected to the connection receiving portion of the water purification cartridge mounting portion, The connection end has a purified water outlet hole, a first annular packing located downstream of the purified water outlet hole, and a second annular packing located upstream of the purified water outlet hole, A water purification cartridge in which the outer diameter G1 of the first annular gasket is smaller than the outer diameter G2 of the second annular gasket. [Appendix 2] The purified water outlet hole has an outlet opening edge, The outlet opening edge has a radially inner edge and a radially outer edge, A water purification cartridge as described in Appendix 1, in which, in a cross section along the center line of the water purification cartridge, when a straight line passing through the radially inner edge and the radially outer edge is designated L1 and a straight line perpendicular to the straight line L1 is designated L2, the straight line L2 is inclined radially outward as it moves downstream. [Appendix 3] The water purification cartridge according to claim 1 or 2, wherein the purified water outlet hole penetrates in the axial direction. [Appendix 4] A water purification cartridge according to any one of claims 1 to 3, wherein the cross-sectional diameter D1 of the first annular gasket is smaller than the cross-sectional diameter D2 of the second annular gasket. [Appendix 5] the connecting end portion has a first groove in which the first annular packing is disposed and a second groove in which the second annular packing is disposed, The width M1 of the first groove is greater than the cross-sectional diameter D1, The width M2 of the second groove is greater than the cross-sectional diameter D2, Attachment 4. The water purification cartridge according to claim 4, wherein the difference (M1-D1) is greater than the difference (M2-D2). [Appendix 6] It contains a purification material that can remove chlorine, the connection end portion has a water-impermeable tip portion in which the first annular packing is disposed, the tip portion is made of resin, The inner surface of the tip portion faces the purified water flow path, The outer surface of the tip portion faces the raw water flow path, The outer surface of the tip has a recess, A water purification cartridge according to any one of claims 1 to 5, wherein the cavity formed by the recess is located radially inward of the first annular gasket. [Appendix 7] A discharge port; a raw water channel; a clean water flow path; A switching mechanism that switches between the raw water flow path and the purified water flow path; A water purification cartridge that generates the purified water in the purified water flow path; a water purification cartridge mounting portion in which the water purification cartridge is disposed; It has The water purification cartridge mounting portion has a connection receiving portion that connects to the water purification cartridge, The water purification cartridge has a connection end portion that is connected to the connection receiving portion, The connection end portion is The device has a purified water outlet hole, a first annular packing located downstream of the purified water outlet hole, and a second annular packing located upstream of the purified water outlet hole, A water-spouting head with a water purification function, in which the outer diameter of the first annular gasket is smaller than the outer diameter of the second annular gasket. [Appendix 8] A faucet device equipped with a water purification function-equipped spout head as described in Appendix 7.

[0169] This application also describes other inventions not included in the inventions described in the claims (including independent claims). Each form, element, configuration, etc. described in the claims and embodiments of this application is recognized as an invention based on the effects that each has.

[0170] Each of the forms, components, configurations, etc. shown in each of the above embodiments can be individually applied to all of the inventions described herein, including the inventions claimed in the present application, even if not all of the forms, components, or configurations of these embodiments are included. [Explanation of symbols]

[0171] 102 Faucet device 104 Main body 106···Lever handle 108···Water discharge head 110 Water conveyance section 114...Operation unit 134... Water purification cartridge attachment part 138 Connection receptacle 152 Connection end 154... Posterior formation part 160... First cylindrical part 162... Second cylindrical part 164...Third cylindrical section 172...1st groove 174...Tip surface 176···Recess 178... Side of recess 180... Bottom of recess 190···Partition wall 210...2nd groove 240···Purified water outlet hole 242 Exit opening edge 254... First receiving cylindrical part 256... Second receiving cylindrical part PC1... Water Purification Cartridge s1...First annular packing s2...Second annular packing WJ...Water purification channel WJ1....Purified water passage WG...Raw water flow path WG1...Raw water passage

Claims

1. A water purification cartridge to be placed in a water purification cartridge mounting portion of a water discharge head with a water purification function, A connection end portion is connected to the connection receiving portion of the water purification cartridge mounting portion, The connection end has a purified water outlet hole, a first annular packing located downstream of the purified water outlet hole, and a second annular packing located upstream of 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, The outer diameter G1 of the first annular packing is 7 mm or more and 18 mm or less, The water purification cartridge, wherein the outer diameter G2 of the second annular gasket is 12 mm or more and 25 mm or less.

2. A water purification cartridge as described in claim 1, wherein the difference (G2-G1) is 3 mm or more and 15 mm or less.

3. A water purification cartridge as described in claim 1 or 2, wherein the ratio (G2 / G1) is 1.2 or more and 2.5 or less.

4. A water purification cartridge described in any one of claims 1 to 3, wherein the cross-sectional diameter D1 of the first annular gasket is smaller than the cross-sectional diameter D2 of the second annular gasket.

5. The connection end has a first groove in which the first annular packing is arranged and a second groove in which the second annular packing is arranged, The width M1 of the first groove is greater than the cross-sectional diameter D1, The width M2 of the second groove is greater than the cross-sectional diameter D2, The water purification cartridge according to claim 4, wherein the difference (M1-D1) is greater than the difference (M2-D2).

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