JP6719793B2 - Water discharge head with water purification function, water purification cartridge and faucet device - Google Patents

Description

The present invention relates to a water discharge head with a water purification function, a water purification cartridge, and a faucet device.

Japanese Patent No. 6186059 discloses a water purifier cartridge that is exchangeably accommodated in the accommodating portion of the water purifier. This water purifier cartridge has a buffer portion that is arranged downstream of the purification material and that blocks a water hammer from the flow path switching valve to the purification material.

Patent No. 6186059

The technique of Japanese Patent No. 6186059 is effective in preventing damage to the purification material. The technique of Japanese Patent No. 6186059 is effective for preventing the attachment of the water purifier and the cartridge for the water purifier.

Based on a new viewpoint, the present inventor has found room for improvement. The present disclosure provides improved spout heads, water purification cartridges and faucets.

In one aspect, the water purification cartridge has a connection end portion which is arranged in the water purification cartridge mounting portion of the water discharge head with a water purification function and which is connected to the connection receiving portion of the water purification cartridge mounting portion. The connection end includes 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.

In another aspect, the water discharge head with a water purification function includes a discharge port, a raw water flow passage, a water purification flow passage, a switching mechanism for switching between the raw water flow passage and the water purification flow passage, and the water purification passage in the water purification flow passage. It has a water purification cartridge for generating purified water, and a water purification cartridge mounting portion in which the water purification cartridge is arranged. The water purification cartridge mounting portion has a connection receiving portion that is connected to the water purification cartridge. The water purification cartridge has a connection end connected to the connection receiving portion. The connection end includes 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 of the first annular packing is smaller than the outer diameter of the second annular packing.

Another aspect is a faucet device including the water discharge head with the water purifying function.

Based on the novel construction, an improved spout head, water purification cartridge and faucet are obtained.

FIG. 1 is a perspective view of a water faucet device according to an embodiment. FIG. 2 is a front view of the water discharge head in the water faucet device of FIG. 3A and 3B are cross-sectional views taken along the line AA of FIG. The phase of the water purification cartridge is different between FIG. 3( a) and FIG. 3( b ). 4A is a sectional view taken along line aa in FIG. 4B, and FIG. 4B is a sectional view taken along line bb in FIG. 4A. 5A is a sectional view taken along the line aa of FIG. 5B, and FIG. 5B is a sectional view taken along the line bb of FIG. 5A. FIG. 6 is a perspective view of a water purification cartridge attached to the water faucet device of FIG. 1. FIG. 7(a) is a side view of the water purification cartridge of FIG. 6, FIG. 7(b) is a front view of the water purification cartridge as seen from the front (downstream side), and FIG. 7(b) is a sectional view taken along line cc of FIG. 7(b), and FIG. 7(d) is a sectional view taken along line dd of FIG. 7(b). FIG. 8 is a partially enlarged view of FIG. 7(c). FIG. 9 is a partially enlarged view of FIG. FIG. 10 is a partially enlarged view of FIG. FIG. 11 is a partially enlarged view of FIG. FIG. 12 is a partially enlarged view of FIG. 11. FIG. 13 is a partially enlarged view of FIG. 2 of Japanese Patent No. 6186059.

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

Unless otherwise specified, the radial direction in the present application means the radial direction of the water purification cartridge attached to the regular position. Unless otherwise specified, the axial direction in the present application means the axial direction of the water purification cartridge attached to the regular position.

Unless otherwise specified, the upstream side in the present application means the upstream side in the water flow, and the downstream side means the downstream side in the water flow. Further, in the water purification cartridge, the upstream side and the downstream side are judged with reference to the above-mentioned axial direction. That is, in the water purification cartridge, the front end side in the axial direction is the downstream side and the rear end side in the axial direction is the upstream side. Further, unless otherwise specified, the downstream side is also referred to as the front side and the upstream side is also referred to as the rear side.

[Discovery that is the basis of the present disclosure]
FIG. 13 is a partially enlarged view of FIG. 2 of Japanese Patent No. 6186059. In this embodiment, two O-rings 13 are arranged on the outer peripheral surface of the connecting cylinder 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 matching the purified water receiving port 11a of the cartridge receiver 11. The outlet 10e extends in the radial direction.

When this water purification cartridge is mounted, the connection cylinder portion 10a is inserted into the cartridge receiver 11. In this insertion, the downstream O-ring 13a is rubbed against the first edge 15 and further rubbed against the second edge 16. That is, it is rubbed twice by one insertion. Therefore, the downstream O-ring 13a is likely to be damaged (improvement target 1).

At the initial stage of the insertion, only the downstream O-ring 13a is inserted inside the cartridge receiver 11, and the upstream O-ring 13b is not inserted inside the cartridge receiver 11. In this state, the center line z1 of the water purification cartridge easily tilts with respect to the cartridge receiver 11. Due to this inclination, the radial tips 17 and 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 cylinder portion 10a is inserted into the cartridge receiver 11 while causing this contact, the inner surface of the cartridge receiver 11 is likely to be damaged (improvement target 2).

When the outlet 10e is inclined with respect to the radial direction while ensuring the cross-sectional area of the outlet 10e, the axial length of the peripheral portion of the outlet 10e increases. Due to this increase in axial length, the total length of the water purification cartridge tends to be long, and the water purification performance (length of water purification material) is likely to be sacrificed. On the other hand, in a state where the outlet 10e extends in the radial direction, the purified water discharged outward in the radial direction hits the surface of the flow path forming member substantially perpendicularly and then flows to the downstream side (arrow in FIG. 13). reference). In this case, the flow path resistance tends to increase (improvement target 3).

Water stains, dirt, and the like may accumulate in the gap 19 between the radial tip 17 of the wall portion located on the upstream side of the downstream O-ring 13a and the facing member. When the water purification cartridge is removed, this deposit may be scraped out by the O-ring 13a on the downstream side and enter the water purification channel from the water purification inlet 11a (improvement target 4).

The following embodiments can improve the above-mentioned newly found improvement target.

[First Embodiment]
FIG. 1 is a perspective view of a faucet device 102 according to an embodiment. The faucet device 102 is attached to a sink (not shown). In FIG. 1, a part that is not visually recognized, that is, a part inside the sink is omitted. Note that the faucet device 102 may be installed at a sink, a sink, and a bathroom.

The faucet device 102 has a main body 104, a lever handle 106, and a water discharge head 108 with a water purifying function. The faucet device 102 is a so-called single lever type faucet. The temperature of the discharged water can be adjusted by rotating the lever handle 106 to the left or right. The amount of water discharged can be adjusted by vertically rotating the lever handle 106. Inside the main body 104, a valve mechanism capable of adjusting the temperature and amount of water discharged is built in. This valve mechanism is known.

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

Heated hot water is introduced into the hot water introducing pipe. The heating is done by a water heater. Unheated water is introduced into the water introducing pipe. The mixing ratio of hot water and water is adjusted by the valve mechanism. With this mixing ratio, temperature control of the discharged water is achieved. In the following, heated hot water, unheated water and a mixed liquid thereof are also simply referred to as “water”.

The water discharge head 108 has a water guiding section 110, a switching section 112, an operating section 114, a water shape adjusting section 116, a display section 120, and a discharge port 122. In the present embodiment, the operation unit 114 is a push button. The water conduit 110 also functions as a grip.

The water shape adjusting unit 116 can change the shape of the discharged water (water shape). The water shape adjusting unit 116 has a water shape adjusting lever 118. By operating the water shape adjusting lever 118, the water shape can be changed. By operating the water shape adjusting lever 118, two or more kinds of water shapes can be selected. In the case of a configuration in which two types of water forms can be selected, it is preferable that the straight water form and the shower water form can be selected. In the case of a configuration in which three types of water forms can be selected, it is preferable that a straight water form and a first shower water form and a second shower water form having different shower discharge modes can be selected. The configuration is adopted. The shower spouting state includes a shower spouting range, a shower spouting amount, a momentum of shower spouting, and the like.

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. A state in which purified water is discharged is also referred to as a purified water discharge state.

The switching unit 112 has a switching mechanism that can switch the discharged water between purified water and raw water by operating the operation unit 114. With this switching mechanism, it is possible to select the raw water discharge state or the purified water discharge state.

FIG. 2 is a front view of the water discharge head 108. 3A and 3B are cross-sectional views taken along the line AA of FIG. The difference between FIG. 3A and FIG. 3B is the circumferential position (phase) of the water purification cartridge. In FIGS. 3A and 3B, the operation unit 114 is in the protruding position. FIG. 4A, FIG. 4B, FIG. 5A, and FIG. 5B are also cross-sectional views of the water discharge head 108. FIG. 4A is a sectional view taken along the line aa of FIG. 4B. FIG. 4B is a sectional view taken along line bb of FIG. In FIGS. 4A and 4B, the operation unit 114 is at the protruding position. FIG. 5A is a cross-sectional view taken along the line aa of FIG. 5B. FIG. 5B is a sectional view taken along line bb of FIG. In FIGS. 5A and 5B, the operation unit 114 is in the pushing position. In addition, in FIG. 4A, FIG. 4B, FIG. 5A, and FIG. 5B, the description of the line visible in the background of the cross section is omitted.

The operation unit 114 functions as a switching button. When switching the flow path, the operation unit 114 is pressed. Each time the operation unit 114 is pressed, switching between the raw water flow path and the purified water flow path is performed. In other words, each time the operation unit 114 is pressed, switching between the raw water discharge state and the purified water discharge state is performed. The switching mechanism has an alternate operation type thrust lock mechanism. The push button operation of the operation unit 114 is realized by this thrust lock. Each time the pressing operation is performed, the push button 114 moves between the pop-out position and the push-in position. This switching mechanism is known.

In the present embodiment, raw water is discharged when the push button 114 is in the protruding position, and purified water is discharged when the push button 114 is in the pressing position. Therefore, FIGS. 3(a), 3(b), 4(a) and 4(b) show the raw water discharge state, and FIGS. 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 pop-out position, and raw water may be discharged when the push button 114 is in the push-in position.

The water discharge head 108 has a water purification cartridge PC1. The water purification cartridge PC1 is arranged inside the water conduit 110. The water guiding section 110 has an outer cylinder section 124. The water purification cartridge PC1 is arranged inside the outer cylindrical portion 124.

A raw water flow path WG is formed outside the water purification cartridge PC1. A water purification passage WJ is formed inside the water purification cartridge PC1. In the raw water discharge state, the raw water that has passed through the raw water flow passage WG is discharged from the discharge port 122 via the raw water flow passage WG in the switching mechanism. On the other hand, in the purified water discharge state, the raw water is filtered by the permeation part 126 of the purified water cartridge PC1 in the process from the outside to the inside of the purified water cartridge PC1 to become purified water. The purified water is discharged from the discharge port 122 via the purified water flow passage WJ inside the purified water cartridge PC1 and the purified water flow passage WJ inside the switching mechanism. The transmission unit 126 is an example of a water purification function unit.

The switching unit 112 of the water discharge head 108 has a first valve 130 and a second valve 132. The water discharge can be switched by opening and closing the two valves.

As shown in FIG. 4B, the first valve 130 has a valve seat 130a, a first valve body 130b, a ball holding body 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 an 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 arranged between the upper portion of the ball holder 130c and the ball 130b. The elastic body 130d is a coil spring. The ball 130b is always urged toward the valve seat 130a by the elastic body 130d.

As shown in FIG. 5B, the second valve 132 has a valve seat 132a, a second valve body 132b, a ball holding body 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 an opening edge of a circular hole. The ball 132b is held by the ball holder 132c. The ball holder 132c is opened downward. The elastic body 132d is arranged between the upper portion of the ball holding body 132c and the ball 132b. The elastic body 132d is a coil spring. The ball 132b is always biased toward the valve seat 132a by the elastic body 132d.

The push button 114 is connected to the ball holder 130c and the ball holder 132c via the thrust lock mechanism. The ball holder 130c and the ball holder 132c move together with the push button 114. The ball 130b moves with the ball holder 130c, and the ball 132b moves with the ball holder 132c. The valve seat 130a and the valve seat 132a are juxtaposed in a direction substantially perpendicular to the moving direction of the push button 114, but their positions are (slightly) different in the moving direction.

Referring to FIGS. 4A and 4B, when the operation portion 114 is at the protruding position, the ball 132b fits into the valve seat 132a and the second valve 132 closes. At this time, the center of the ball 130b is displaced 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 cutoff valve that closes the purified water flow path.

Referring to FIGS. 5A and 5B, when the operation portion 114 is in the push-in position, the ball 130b fits into the valve seat 130a and the first valve 130 closes. At this time, the center of the ball 132b is displaced 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 cutoff valve that closes the raw water flow path.

The water discharge 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 an intermediate portion of the water purification cartridge PC1 is arranged and a connection receiving portion 138. The cylindrical hollow portion 136 is formed inside the outer tubular portion 124. The connection receiving portion 138 is located on the downstream side of the cylindrical hollow portion 136.

FIG. 6 is a perspective view of the water purification cartridge PC1. FIG. 7A is a side view of the water purification cartridge PC1, FIG. 7B is a front view of the water purification cartridge PC1, and FIG. 7C is a cross section taken along line cc of FIG. 7B. It is a figure and Drawing 7 (d) is a sectional view which met the dd line of Drawing 7 (b).

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

The connection end portion 152 is provided on the downstream side of the intermediate portion 150. The inside of the connection end portion 152 is hollow. This cavity functions as a purified water flow path WJ. That is, the connection end portion 152 has the purified water flow passage WJ therein. The material of the connection end portion 152 is resin. The connection end portion 152 is wholly integral. The connection end portion 152 is integrally formed of resin. The connection end portion 152 may be formed by combining a plurality of separately molded members.

The intermediate portion 150 has a cylindrical shape. The middle part 150 has a permeation part 151 that allows water to permeate. The middle part 150 has a filtering function. The intermediate portion 150 has a hollow portion inside. This cavity functions as the purified water flow passage WJ. The middle part 150 may have an outer filtration layer and an inner filtration layer, for example. A water purification material may be arranged between the outer filtration layer and the inner filtration layer. The water purification material contains, for example, activated carbon as a main component. Nonwoven fabric is used for the outer filtration layer and the inner filtration layer, for example. A ceramic having a sterilizing effect may be used for the outer filtration layer and/or the inner filtration layer. Ion exchangers may be employed in 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. In addition, the intermediate part 150 of this embodiment is an example of a water purification function part (a part which exhibits a water purification function). The middle part 150 does not need to have a filtering function. The intermediate part 150 may be a cylindrical wall part that is impermeable to water.

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

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

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

The connection end portion 152 has a first cylindrical portion 160. Furthermore, the connection end portion 152 has a second cylindrical portion 162. Furthermore, the connection end portion 152 has a third cylindrical portion 164. Further, the connection end portion 152 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 on the downstream side 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.

The connection end portion 152 has a first annular packing s1 and a second annular packing s2. In the present embodiment, the first annular packing s1 is an O ring. In the present embodiment, the second annular packing s2 is an O ring.

The connection end portion 152 has a maximum outer diameter portion. In the present embodiment, the maximum outer diameter portion of the connection end portion 152 is the holding cylindrical portion 166. The maximum outer diameter portion (holding cylinder portion 166) covers the downstream end of the intermediate portion 150. The maximum outer diameter portion (holding cylindrical portion 166) holds the downstream end of the intermediate portion 150.

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.

The connection end portion 152 has a first annular packing s1 and a second annular packing s2. The first annular packing s1 is arranged in the first cylindrical portion 160. The second annular packing s2 is arranged in the second cylindrical portion 162.

FIG. 8 is a partially enlarged view of FIG. 7(c). FIG. 9 is a partially enlarged view of FIG.

The first cylindrical portion 160 constitutes an end portion on the downstream side of the connection end portion 152. The first cylindrical portion 160 constitutes an end portion on the downstream side of the water purification cartridge PC1.

The first cylindrical portion 160 constitutes an end portion on the downstream side of the water purification cartridge PC1. The first cylindrical portion 160 constitutes an end portion on the downstream side of the connection end portion 152.

The connection end portion 152 has a tip portion 170. In the present 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 the front wall portion 173a and the rear wall portion 173b. The front wall portion 173a forms a front side surface of the first groove 172. The rear wall portion 173b forms a rear side surface of the first groove 172.

The first annular packing s1 is arranged at the tip portion 170. The first annular packing s1 is arranged in the first groove 172.

The tip portion 170 has a tip surface 174. The front end surface 174 is the front end 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 a flat surface. The tip surface 174 extends in the radial direction. The tip surface 174 is annular (see FIG. 7B). The tip surface 174 is provided over the entire circumference. The center of the front end surface 174 is located on the center line z1 of the water purification cartridge PC1.

The tip 170 is impermeable to water. The inner surface of the tip portion 170 faces the purified water flow passage WJ. In the present embodiment, the inner surface of the tip portion 170 includes an inner surface 194 described below. The outer surface of the tip portion 170 faces the raw water flow passage WG. In the present embodiment, the outer surface of the tip 170 includes a tip 174 and a recess 176. The outer surface of the tip 170 has a recess 176. The inner surface and the outer surface of the tip portion 170 are partitioned by a first annular packing 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 arranged at a position intersecting the center line z1 of the water purification cartridge PC1.

The recess 176 is open on the downstream side. The recess 176 is open toward the front in the axial direction. The recess 176 is open to the raw water flow path WG. The recess 176 is water impermeable. The recess 176 has a circular cross-sectional shape (see FIG. 7B). A tip surface 174 is arranged around the recess 176 (outside in the radial direction). The concave portion 176 forms a cavity inside the tip portion 170. The recess 176 forms a cylindrical cavity. The cavity formed by the concave portion 176 exists inside the first annular packing s1 in the radial direction. The cavity formed by the concave portion 176 exists inside the first groove 172 in the radial direction. The center line of the front end surface 174 coincides with the center line z1 of the water purification cartridge PC1.

As shown in FIGS. 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 inside the first groove 172 in the radial direction. The bottom surface 180 is a flat surface. 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.

A cavity is formed by the recess 176 on the inner side in the radial direction of the first groove 172. A cavity is formed by the recess 176 on the inner side in the radial direction of the bottom surface 172a.

The tip portion 170 has a partition wall 190. The partition wall 190 is water impermeable. The partition wall 190 is located on the upstream side of the front end surface 174. The partition wall 190 extends along the radial direction. The center line of the partition wall 190 coincides with the center line z1 of the water purification cartridge PC1.

The partition wall 190 intersects the center line z1 of the water purification cartridge PC1. That is, the partition wall 190 is provided at a position intersecting the center line z1 of the water purification cartridge PC1. In the present embodiment, the partition wall 190 intersects the center line z1 of the water purification cartridge PC1 at its center. The partition wall 190 may intersect the center line z1 of the water purification cartridge PC1 at a position other than the center thereof. The partition wall 190 constitutes the bottom surface 180 of the recess 176. The bottom surface 180 is the outer surface 192 of the partition wall 190. Thus, the outer surface of the tip portion 170 has the recess 176 having the outer surface 192 of the partition wall 190 as the bottom surface 180.

The partition wall 190 partitions the inside and outside of the water purification cartridge PC1. The outer surface 192 of the partition wall 190 constitutes the outer surface of the water purification cartridge PC1. The outer surface 192 faces the raw water flow path WG. The inner surface 194 of the partition wall 190 constitutes the inner surface of the water purification cartridge PC1. The inner surface 194 faces the purified water flow path WJ.

The connection end portion 152 has a connecting extension portion 200. The connecting extension part 200 connects the first cylindrical part 160 and the second cylindrical part 162. As shown in FIGS. 6 and 7B, the plurality of connecting extension portions 200 are arranged at equal intervals in the circumferential direction. In the present embodiment, the four connection extending portions 200 are arranged at equal intervals in the circumferential direction. The connecting extension portion 200 extends in a direction inclined with respect to the center line z1 of the water purification cartridge PC1. The connecting extension portion 200 extends radially inward as it goes 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.

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 peripheral surface of the second cylindrical portion 162. The second annular packing s2 is arranged in the second groove 210. The inside of the second cylindrical portion 162 is hollow. The inside of the second cylindrical portion 162 is the purified water flow passage WJ.

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 in the radial direction. The downstream end surface 212 is annular. The downstream end surface 212 is formed over the entire circumference.

The downstream end surface 212 may be continuously formed continuously in the circumferential direction. The downstream side end surface 212 may be formed by arranging the partitioning parts partitioned by the connecting extension part 200 in the circumferential direction. The downstream end surface 212 may have a portion that is continuously formed in the entire circumferential direction without interruption, and a portion in which the dividing portions that are divided by the connecting extension portion 200 are arranged in the circumferential direction. In the present embodiment, the downstream end surface 212 is formed by arranging four partition portions 214 partitioned by the connecting extension portion 200 in the circumferential direction.

The connecting extension part 200 has an extension part downstream surface 202. The extension portion downstream surface 202 is a surface on the downstream side of the connection extension portion 200. The extension portion downstream surface 202 has a configuration 1 in which the extension portion downstream surface 202 extends radially inward as it extends toward the downstream side. With this configuration 1, when the connection end portion 152 of the water purification cartridge PC1 is inserted into the connection reception portion 138 of the water purification cartridge mounting portion 134 of the water discharge head 108, the portion of the connection reception portion 138 that hits the extension portion downstream surface 202 is The center line of the connection end portion 152 and the center line of the connection receiving portion 138 are displaced in a direction in which they coincide with each other, and as a result, the respective portions of the connection end portion 152 and the connection receiving portion 138 can be prevented from being damaged and the water purification cartridge PC1 There is an effect 1 that the operability is improved when the connection end portion 152 of FIG.

On the other hand, the downstream end surface 212 includes the configuration 2 that extends in the radial direction, that is, a surface that is perpendicular to the axial direction. The water discharge head 108 has a pressing portion that is pressed by the water purification cartridge PC1 when the connection end portion 152 of the water purification cartridge PC1 is inserted into the connection receiving portion 138, and a specific function is achieved by pressing this pressing portion. A water discharge head with a water purifying function, a water purifying cartridge, and a faucet device can be considered. Examples of this specific function include control of switching of water discharge state (raw water/purified water) and switching of water discharge mode. In this case, the surface of the connection end portion that presses the pressing portion extends in the radial direction, that is, the surface that is perpendicular to the axial direction, so that the pressing portion can be pressed accurately and/or satisfactorily. The effect 2 of being able to do occurs. The effect 2 is exhibited by the downstream end surface 212 extending in the radial direction.

The configuration 1 and the configuration 2 can realize both the effect 1 and the effect 2 even though they are arranged in the same axial region of the connection end portion 152. Furthermore, since both configurations are arranged in the same axial region of the connection end portion 152, as a result, the water discharge head with a water purifying function, the water purifying cartridge, and the faucet device are prevented from being upsized, and the purifying function portion is arranged. An increase in the feasible area can also be achieved.

The third cylindrical portion 164 has a circumferential surface 220 and a step 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 step surface 222 is a flat surface. The step surface 222 extends in the radial direction. The step surface 222 is annular. The step surface 222 is formed over the entire circumference. The inside of the third cylindrical portion 164 is the purified water flow path WJ.

The holding cylindrical portion 166 has a circumferential surface 230 and a step 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 step surface 232 is a flat surface. The step surface 232 extends along the radial direction. The step surface 232 is annular. The step surface 232 is formed over the entire circumference. The step surface 232 connects the upstream side of the circumferential surface 220 and the downstream side of the circumferential surface 230.

The connection end portion 152 has a purified water outlet hole 240. The first annular packing s1 is located on the downstream side of the purified water outlet hole 240. The second annular packing s2 is located on the upstream side 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 separated from the second cylindrical portion 162, and this separation forms the purified water outlet hole 240. A purified water outlet hole 240 is formed between the connection extending portions 200 that are adjacent to each other in the circumferential direction.

FIG. 10 is a partially enlarged view of FIG. FIG. 10 is an enlarged view of the vicinity of the connection end portion 152. As described above, the water purification cartridge mounting portion 134 of the water discharge head 108 has the 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.

The connection end portion 152 is watertightly connected to the connection receiving portion 138. The first annular packing s1 and the second annular packing s2 ensure watertightness. The first cylindrical portion 160 (tip portion 170) of the connection end portion 152 is inserted inside the first receiving cylindrical portion 254. The first annular packing s1 is in close contact with the inner peripheral surface of the first receiving cylindrical portion 254. The second cylindrical portion 162 of the connection end portion 152 is inserted inside the second receiving cylindrical portion 256. The second annular packing s2 is in close contact with the inner peripheral surface of the second receiving cylindrical portion 256. The end surface 258 of the second receiving cylindrical portion 256 is in contact with the step surface 222. By this abutment, the water purification cartridge PC1 is positioned in the axial direction.

The connection receiving portion 138 has a water purification passage WJ1 that divides the water purified from the water purification outlet 240 from the raw water flow passage WG and constitutes a part of the water purification passage WJ (see FIGS. 5B and 10). ). Further, the connection receiving portion 138 has a raw water passage WG1 that divides the raw water from the purified water passage WJ1 and constitutes a part of the raw water passage WG (see FIGS. 4A and 10). The connection receiving portion 138 has a partition wall 260 that forms the raw water passage WG1 (see FIG. 10). The partition wall 260 is connected to the downstream end of the first receiving cylindrical portion 254. The partition 260 is located downstream of the recess 176. The partition wall 260 extends in the radial direction. The partition wall 260 forms a raw water passage WG1 between the partition wall 260 and the recess 176. The raw water passage WG1 forms a raw water flow passage WG penetrating in the left-right direction (see FIG. 4A). The raw water passage WG1 guides the raw water to the front end surface 174 of the water purification cartridge PC1. The raw water passage WG1 guides the raw water to the recess 176. The front end surface 174 faces the raw water flow path WG. The recess 176 faces the raw water flow path WG. The first annular packing s1 and the second annular packing s2 prevent the purified water from the purified water outlet hole 240 from flowing into the raw water flow passage WG. The first annular packing s1 prevents water from the raw water passage WG1 from flowing into the purified water flow passage WJ. The second annular packing 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 packing s2 prevents the purified water from the purified water outlet hole 240 from flowing into the raw water flow passage WG.

A water-permeable member 270 is installed on the downstream side of the recess 176 (see FIG. 10). The water-permeable member 270 is arranged so as to face 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 front end 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 mesh is a metal mesh (mesh metal mesh). The water-permeable member 270 does not hinder the flow of the raw water flow path WG. The water flow of the raw water passage WG1 can hit the tip surface 174. The water flow of 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.

FIG. 11 is a partially enlarged view of FIG. The purified water outlet 240 of the purified water 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 a circle as a whole. 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 a circle as a whole. 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 more radially inside than the radially outer edge 242b. The radially inner edge 242a is located downstream of the radially outer edge 242b.

In FIG. 11, what is indicated by a broken line is a straight line L1 connecting the radially inner edge 242a and the radially outer edge 242b. What is indicated by a chain double-dashed line in FIG. 11 is a straight line L2 perpendicular to the straight line L1. The straight line L2 is inclined so as to go radially outward as it goes downstream. What is indicated by a double-headed arrow θ in FIG. 11 is an angle formed by the center line z1 of the water purification cartridge PC1 and the straight line L2. This angle θ is also referred to as an opening inclination angle.

In FIG. 11, what is indicated by a double-headed arrow S1 is 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 a radial distance between the radial inner edge 242a and the radial outer edge 242b. A double-headed arrow V in FIG. 11 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 radially inner edge 242a and the radially outer edge 242b.

The purified water outlet hole 240 penetrates in the axial direction. In other words, the purified water outlet hole 240 is connected in the axial direction. FIG. 12 is an enlarged sectional view in which a part of FIG. 11 is enlarged. In the cross section along the center line z1, the purified water outlet hole 240 can pass a straight line X extending in the axial direction (see arrow y1 in FIG. 12). In the cross section along the center line z1, the purified water outlet hole 240 has, as the straight line X, a straight line X1 located at the outermost side in the radial direction and a straight line X2 located at the innermost side in the radial direction. The straight line X1 and the straight line X2 are separated from each other in the radial direction. That is, there is a radial distance between the straight line X1 and the straight line X2. This radial distance is also referred to as the front-rear penetration width. The purified water outlet hole 240 has a front-back penetration width S2. In the present embodiment, the front-back penetration width S2 is equal to the radial opening width S1.

In FIG. 9, what is indicated by a double-headed arrow M1 is the width of the first groove 172. The groove width M1 (mm) is measured along the axial direction. In FIG. 9, what is indicated by a double-headed arrow M2 is 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.

In the present application, the diameter of the cross section of the first annular packing s1 is the cross sectional diameter D1 (mm), and the diameter of the cross section of the second annular packing s2 is the cross sectional diameter D2 (mm). 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.

The sectional diameter D1 is smaller than the 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.

As shown in FIG. 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 a gap in the axial direction. In the first groove 172, the first annular packing s1 can move in the axial direction.

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 changes depending on the axial position. In the present 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 on the most upstream side in the first groove 172. When the first annular packing s1 moves downstream in the first groove 172, the compression of the first annular packing s1 is loosened. Further, when the first annular packing s1 moves downstream in the first groove 172, the inner diameter and the outer diameter of the first annular packing s1 decrease. By moving the first annular packing s1 to the downstream side, the water purification cartridge PC1 can be easily removed.

As shown in FIG. 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 a gap in the axial direction. In the second groove 210, the second annular packing s2 can move in the axial direction.

The bottom surface 210a of the second groove 210 is a circumferential surface as a whole 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 depending on the axial position. The diameter of the bottom surface 210a is constant. In FIG. 9, the second annular packing s2 is located on the most upstream side in the second groove 210. Even if the second annular packing s2 moves axially within the second groove 210, the degree of compression of the second annular packing s2 does not change.

What is indicated by a double-headed arrow G1 in FIG. 9 is the outer diameter of the first annular packing s1. The outer diameter G1 is measured in a state where the first annular packing s1 is mounted in the first groove 172 and the water purification cartridge PC1 is not mounted in the water discharge head 108. In other words, the outer diameter G1 is measured in the state of the water purification cartridge PC1 alone. In FIG. 9, what is indicated by a double-headed arrow G2 is the outer diameter of the second annular packing s2. The outer diameter G2 is measured with the second annular packing s2 mounted in the second groove 210 and the water purification cartridge PC1 not mounted in the water discharge head 108. In other words, the outer diameter G2 is measured in the state of the water purification cartridge PC1 alone. When the diameter of the bottom surface of the groove changes like the bottom surface 172a of the first groove 172, the outer diameters G1 and G2 of the annular packing are such that the annular packing is located at the position where the outer diameter of the bottom surface of the groove is the maximum. Measured in the deployed condition.

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

What is indicated by a double-headed arrow W1 in FIG. 9 is a width obtained by subtracting the sectional diameter D1 from the groove width M1. That is, W1=M1-D1. In FIG. 9, what is indicated by a double-headed arrow W2 is a width obtained by subtracting the sectional diameter D2 from the groove width M2. W2=M2-D2. It should be noted that the first annular packing s1 and the second annular packing s2 in FIG. 9 are in the mounted state, and thus are compressed. Therefore, the sectional width of the first annular packing s1 in FIG. 9 is not exactly the sectional diameter D1. Similarly, the sectional width of the second annular packing s2 in FIG. 9 is not the sectional diameter D2. From this point of view, it is inappropriate to show the width W1 and the width W2 in FIG. 9, but the width W1 and the width W2 are shown in FIG. 9 for the sake of clarity. Similarly, although it is inappropriate to illustrate the cross-sectional diameter D1 and the cross-sectional diameter D2 in FIG. 9, the cross-sectional diameter D1 and the cross-sectional diameter D2 are illustrated in FIG. 9 for the sake of clarity.

The width W1 is larger than the width W2. In other words, the difference (M1-D1) is larger than the difference (M2-D2).

At the seal portion sealed by the annular packing, calcium contained in water, dirt and the like are accumulated, and the annular packing is fixed. Further, the annular packing, which is constantly exposed to water, swells, and this swelling can also promote the fixing. Due to this adhesion, it becomes difficult to remove the water purification cartridge PC1 from the connection receiving portion 138. In addition, since a large force is required to remove the annular packing, a load is applied to the annular packing, and deterioration of the annular packing can be promoted.

By providing the width W1 and the width W2, the annular packings s1 and s2 can be easily deformed when the water purification cartridge PC1 is removed. Therefore, the detachability is improved. Further, the annular packings s1 and s2 can move in the groove. Therefore, the fixed portion is peeled off in stages, and the removability is improved.

This embodiment has the following effects.

[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 ).

This configuration improves the improvement target 1 described above. Since the outer diameter G1 of the first annular packing s1 on the downstream side is small, the probability of being rubbed by the edge 259 of the second receiving cylindrical portion 256 is low (see FIG. 10). Therefore, unlike the prior art (FIG. 13), the insertion is rarely rubbed twice. Therefore, the damage of the first annular packing s1 on the downstream side is suppressed (the effect of suppressing the packing damage).

Further, this configuration improves the 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 arranged is also small (see FIG. 7A). Therefore, in the initial stage of inserting the water purification cartridge PC1, even if the center line z1 of the water purification cartridge PC1 is inclined, the probability that the first cylindrical portion 160 hits the inner surface of the second receiving cylindrical portion 256 is low (see FIG. 10 ). Therefore, the damage on the inner surface of the connection receiving portion 138 is suppressed (the effect of suppressing damage to the receiving portion).

Furthermore, the configuration of G1<G2 makes it easier to incline the straight line L2 (FIG. 11), which is the direction of the purified water outlet hole 240, and makes it easier to penetrate the purified water outlet hole 240 in the axial direction. Therefore, this configuration also contributes to the improvement of the improvement target 3 and the improvement target 4.

If the outer diameter G1 of the first annular packing s1 is too small, the strength of the tip end portion 170 of the water purification cartridge PC1 tends to decrease, and the water tightness of the first annular packing s1 tends to decrease. From this viewpoint, the outer diameter G1 is preferably 7 mm or more, more preferably 9 mm or more, 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 be large. From this viewpoint, the outer diameter G1 is preferably 18 mm or less, more preferably 15 mm or less, and further preferably 13 mm or less. In the above embodiment, the outer diameter G1 is 11 mm.

If the outer diameter G2 of the second annular packing s2 is too small, the flow rate of purified water tends to decrease. From this viewpoint, the outer diameter G2 is preferably 12 mm or more, more preferably 14 mm or more, and further 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 water faucet tends to be large. From this viewpoint, the outer diameter G2 is preferably 25 mm or less, more preferably 23 mm or less, and further preferably 21 mm or less. In the above embodiment, the outer diameter G2 is 18.8 mm.

If the difference (G2-G1) is too small, the effect of suppressing the damage to the packing and the effect of suppressing the damage to the receiving portion are reduced, and the improvement effects of the improvement target 3 and the improvement target 4 may be reduced. If the difference (G2-G1) is too small, the flow rate of purified water tends to decrease. From these viewpoints, the difference (G2-G1) is preferably 3 mm or more, more preferably 4 mm or more, and further preferably 6 mm or more. If the difference (G2-G1) is too large, the water purification cartridge PC1 and the water discharge head 108 become large, and the faucet tends to be large. From this viewpoint, the difference (G2-G1) is preferably 15 mm or less, more preferably 12 mm or less, still more preferably 10 mm or less. In the above embodiment, the difference (G2-G1) is 7.8 mm.

When the ratio (G2/G1) is too small, the effect of suppressing the damage to the packing and the effect of suppressing the damage to the receiving portion described above may decrease, and the improvement effects of the improvement target 3 and the improvement target 4 may also decrease. Moreover, when G2/G1 is too small, the flow rate of purified water tends to decrease. From this viewpoint, G2/G1 is preferably 1.2 or more, more preferably 1.3 or more, still more preferably 1.5 or more. If G2/G1 is too large, the water purification cartridge PC1 and the water discharge head 108 become large, and the faucet tends to be large. From this viewpoint, G2/G1 is preferably 2.5 or less, more preferably 2.3 or less, still more preferably 1.9 or less. In the above embodiment, G2/G1 is 1.7.

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

This opening inclination angle θ improves the improvement target 3 described above. The opening inclination angle θ allows the 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. Since the axial length of the purified water outlet hole 240 is suppressed, the total length of the purified water cartridge PC1 and the sacrifice of the purified water performance (length of the purified water material) are suppressed (axial direction). Length suppression effect). In addition, since the purified water is discharged obliquely forward from the purified water outlet hole 240, it is possible to prevent the purified water from hitting the surface of the flow path forming member perpendicularly and reduce the flow path resistance (flow path resistance reducing effect).

Further, the opening inclination angle θ improves the improvement target 4 described above. In the form shown in FIG. 13, water is less likely to flow into the gap 19 between the radial tip 17 of the wall portion located on the upstream side of the downstream O-ring 13a and the facing member. This is because the extending direction of the gap 19 is the axial direction, whereas the direction of the water flow adjacent to the gap 19 is substantially the radial direction (see the arrow in FIG. 13 ). Therefore, water is likely to stay in the gaps 19, and water stains and dirt are likely to be accumulated in the gaps 19. On the other hand, in the embodiment of FIG. 11, the opening inclination angle θ is less than 90°, and due to this angle θ, a water flow obliquely forward in the purified water outlet hole 240 may occur (see arrow y2 in FIG. 12 ). ). This obliquely forward water flow includes a component that is axially forward, and easily flows into the gap 280 between the rear wall portion 173b and the first receiving cylindrical portion 254. Therefore, water is unlikely to stay in the gap 280, and water stains and dirt are unlikely to be accumulated in the gap 280. As described above, if there is a deposit in the gap 280, this deposit is easily scraped out by the first annular packing s1 when the water purification cartridge PC1 is taken out and easily enters the water purification passage WJ from the water purification outlet hole 240. However, in the gap 280 where water is unlikely to stay, the deposit is suppressed, and the inconvenience of the scraped deposit flowing into the purified water flow passage WJ is suppressed (deposit control effect).

If the opening inclination angle θ is too small, the connecting end portion 152 becomes long, and the effect of suppressing the axial length decreases. From this viewpoint, the opening inclination angle θ is preferably 30° or more, more preferably 40° or more, and further preferably 50° or more. If the opening inclination angle θ is too large, the flow path resistance reducing effect and the deposit suppressing effect decrease. From this viewpoint, the opening inclination angle θ is preferably 80° or less, more preferably 70° or less, and further preferably 60° or less. In the present embodiment, the opening inclination angle θ is 56°.

[Effect of clean water outlet hole penetrating in the axial direction]
As described above, the purified water outlet hole 240 penetrates in the axial direction (see arrow y1 in FIG. 12). Therefore, the water flow easily enters the gap 280 , and the above-described effect of suppressing deposits is further enhanced. Further, since the water passing through the purified water outlet hole 240 easily flows in the axial direction, the above-described flow path resistance reducing effect is further enhanced.

If the front-rear penetration width S2 (see FIG. 12) is too small, the effect of suppressing deposits and the effect of reducing flow path resistance decrease. From this viewpoint, the front-rear penetration width S2 is preferably 1.05 mm or more, and more preferably 1.1 mm or more. If the front-rear penetration width S2 is excessively large, the outer diameter G2 of the second annular packing s2 becomes large, and the water purification cartridge PC1 and the water discharge head 108 become large. Further, when the outer diameter G2 becomes large, the watertightness caused by the second annular packing s2 is likely to decrease. From these viewpoints, the front-rear penetration width S2 is preferably 5 mm or less, more preferably 3 mm or less, and further preferably 2 mm or less. In this embodiment, the front-rear penetration width S2 is 1.1 mm.

If the radial opening width S1 (see FIG. 11) is too small, the effect of suppressing deposits and the effect of reducing flow path resistance decrease. From this viewpoint, 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 becomes large, and the water purification cartridge PC1 and the water discharge head 108 become large. Further, when the outer diameter G2 becomes large, the watertightness caused by the second annular packing s2 is likely to decrease. From these viewpoints, the radial opening width S1 is preferably 5 mm or less, more preferably 3 mm or less, and further preferably 2 mm or less. In this embodiment, the radial opening width S1 is 1.1 mm.

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

If the outer diameter of the annular packing is small, it becomes difficult to stretch the annular packing, and the handleability of the annular packing deteriorates. Therefore, an annular packing having a small outer diameter is difficult to mount in the groove. That is, the annular packing having a small outer diameter has low mountability and the annular packing having a large outer diameter has high mountability.

When the annular packing has a small cross-sectional diameter, the annular packing is easily stretched and easily fitted in the groove. That is, the annular packing having a small cross-sectional diameter has high mountability. An annular packing with a large cross-sectional diameter is difficult to stretch and has low wearability.

An annular packing having a small cross-sectional diameter has a small crushing allowance and a low sealing property. Since the annular packing having a large cross-sectional diameter can increase the crushing margin, it has a high sealing property. In addition, if the crushing margin is large, it is easy to secure the sealing property even if a manufacturing dimension error of the peripheral members occurs.

In the above-described embodiment, the first annular packing s1 on the downstream side may have poor wearability due to the small outer diameter G1. Therefore, the wearability is improved by reducing the cross-sectional diameter D1.

On the other hand, the second annular packing s2 on the upstream side has high mountability due to the large outer diameter G2, and there is a margin in mountability. Therefore, the cross-sectional diameter D2 is increased to improve the sealing property.

From the viewpoint of sealability, the sectional diameter D1 of the first annular packing s1 is preferably 1.0 mm or more, more preferably 1.2 mm or more, and further preferably 1.3 mm or more. From the viewpoint of wearability, the sectional diameter D1 is preferably 2.0 mm or less, more preferably 1.9 mm or less, still more preferably 1.7 mm or less. In the above embodiment, the sectional diameter D1 is 1.5 mm.

From the viewpoint of sealing property, the sectional diameter D2 of the second annular packing s2 is preferably 1.3 mm or more, more preferably 1.5 mm or more, and further preferably 1.7 mm or more. From the viewpoint of wearability, the sectional diameter D2 is preferably 3.0 mm or less, more preferably 2.5 mm or less, and further preferably 2.3 mm or less. In the above embodiment, the cross-sectional diameter D2 is 1.9 mm.

If the cross-sectional diameter D2 is too small, the sealing property of the second annular packing s2 tends to deteriorate, and if the cross-sectional diameter D1 is too large, the mounting property of the first annular packing s1 tends to deteriorate. That is, if the cross-sectional diameter D2 is too small or the cross-sectional diameter D1 is too large, the overall performance of watertightness and wearability deteriorates. From this viewpoint, the difference (D2-D1) is preferably 0.1 mm or more, more preferably 0.2 mm or more, and further preferably 0.3 mm or more. If the cross-sectional diameter D2 is too large, the mountability of the second annular packing s2 tends to deteriorate, and if the cross-sectional diameter D1 is too small, the sealing performance of the first annular packing s1 tends to deteriorate. That is, if the cross-sectional diameter D2 is too large or the cross-sectional diameter D1 is too small, the overall performances of watertightness and wearability deteriorate. From this viewpoint, the difference (D2-D1) is preferably 1.0 mm or less, more preferably 0.8 mm or less, and further preferably 0.6 mm or less. In the above embodiment, the difference (D2-D1) is 0.4 mm.

If the cross-sectional diameter D2 is too small or the cross-sectional diameter D1 is too large, the overall performance of watertightness and wearability deteriorates. From this viewpoint, the ratio (D2/D1) is preferably 1.05 or more, more preferably 1.1 or more, still 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 wearability deteriorates. From this viewpoint, the ratio (D2/D1) is preferably 2.0 or less, more preferably 1.5 or less, and further preferably 1.3 or less. In the above embodiment, the ratio (D2/D1) is 1.27.

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

Since the second annular packing s2 on the upstream side has a large cross-sectional diameter D2, it is easily deformed when the water purification cartridge PC1 is removed. Therefore, the second annular packing s2 is unlikely to be a factor that reduces the removability. On the other hand, since the first annular packing s1 on the downstream side has a small cross-sectional diameter D1, it is difficult to deform when removing the water purification cartridge PC1. Therefore, the first annular packing s1 is likely to be a factor that reduces the detachability. Therefore, the detachability is improved by making the width W1 of the first annular packing s1 that is difficult to deform larger than the width W2. In addition, if both the width W1 and the width W2 are increased, the axial length of the connection end portion 152 is increased, and the length of the water purification cartridge PC1 is increased or the water purification performance (length of the water purification material) is deteriorated. These inconveniences are suppressed by making the width W2 smaller than the width W1.

From the viewpoint of removability, the width W1 is preferably 0.7 mm or more, more preferably 0.9 mm or more, still more preferably 1.1 mm or more. 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, from the viewpoint of suppressing the lengthening of the water purification cartridge PC1 and the deterioration of the water purification performance. In this embodiment, the width W1 is 1.3 mm.

From the viewpoint of removability, the width W2 is preferably 0.2 mm or more, more preferably 0.3 mm or more, still more preferably 0.4 mm or more. The width W2 is preferably 1.5 mm or less, more preferably 1.1 mm or less, and further preferably 0.8 mm or less, from the viewpoint of suppressing the lengthening of the water purification cartridge PC1 and the deterioration of the water purification performance. In this embodiment, the width W2 is 0.6 mm.

From the viewpoint of suppressing the excessively small width W1 and the excessively large width W2, the difference (W1-W2) is preferably 0.1 mm or more, more preferably 0.3 mm or more, still more preferably 0.5 mm or more. From the viewpoint of suppressing the excessive width W1 and the excessive width W2, the difference (W1-W2) is preferably 1.5 mm or less, more preferably 1.2 mm or less, and further preferably 0.8 mm or less. In this embodiment, the difference (W1-W2) is 0.7 mm.

From the viewpoint of suppressing the excessively small width W2 and the excessively large width W1, the ratio (W2/W1) is preferably 0.2 or more, more preferably 0.3 or more, and further preferably 0.4 or more. From the viewpoint of suppressing the excessive width W2 and the excessive width W1, the ratio (W2/W1) is preferably 0.9 or less, more preferably 0.8 or less, still more preferably 0.6 or less. In this embodiment, the ratio (W2/W1) is 0.46.

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

Since the first annular packing s1 is arranged on the tip portion 170, the tip portion 170 requires a predetermined axial length. Further, the first groove 172 is arranged in the tip portion 170, and the dimensional accuracy of the bottom surface 172a thereof is an important element for improving the sealing performance of the first annular packing s1.

When the inside of the packing disposing portion having a predetermined axial length is solid, sink marks (molding shrinkage) during molding become large. This phenomenon can occur regardless of whether it is a thermoplastic resin or a thermosetting resin. For example, in injection molding of a thermoplastic resin, sink marks may occur during cooling. For example, in molding a thermosetting resin, sink marks may occur when the resin is cured. In addition, if the inside of the packing disposing portion having a predetermined axial length is solid, the dimensional variation among the individuals becomes large.

By providing a cavity on the inner side in the radial direction of the packing arrangement portion, the sink mark is suppressed and the dimensional variation is also suppressed. Therefore, the dimensional accuracy of the bottom surface 172a of the first groove 172 is increased, and the sealing performance of the first annular packing s1 is improved.

The recess located radially inward of the packing disposing portion may be provided on the outer surface of the tip portion 170 as in the water purification cartridge PC1 or may be provided on the inner surface of the tip portion 170.

When the concave portion is provided on the inner surface of the tip portion 170, the concave portion faces the purified water flow passage WJ. Purified water may flow into and accumulate in this recess. Considering hygiene, it is not preferable that purified water from which chlorine has been removed remains in this recess. On the other hand, in the present embodiment, the recess 176 is provided on the outer surface of the tip 170. The recess 176 faces the raw water flow path WG. Raw water stays in the recess 176. In the present embodiment, the situation where purified water from which chlorine has been removed remains in the recess is avoided.

Further, when the concave portion is provided on the inner surface of the tip portion 170, the concave portion complicates the shape of the flow path inside the purified water outlet hole 240 in the radial direction, and turbulent flow is likely to occur. This turbulent flow may reduce the flow rate at the purified water outlet hole 240. Since the purified water passes through the purification function part of the purified water cartridge PC1, the water pressure of the water purification passage WJ is lower than the water pressure of the raw water passage WG. When the flow rate in the purified water outlet hole 240 is reduced by the turbulent flow, the flow rate in the purified water flow path WJ is further reduced. In the present embodiment, such a situation is avoided.

What is indicated by a double-headed arrow T in FIG. 9 is 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 be reduced and the sealing performance may be reduced due to the 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, still more preferably 1.2 mm or more. If the shortest distance T is too large, the above-mentioned sink mark becomes large. From this viewpoint, the shortest distance T is preferably 3.0 mm or less, more preferably 2.0 mm or less, and further preferably 1.8 mm or less. In the above embodiment, the shortest distance T is 1.5 mm.

When switching between the raw water discharge state and the purified water discharge state, the first valve 130 (raw water cutoff valve) or the second valve 132 (purified water cutoff valve) is momentarily closed. When switching from the raw water discharge state to the purified water discharge state, the raw water flow passage WG having a high water pressure is momentarily shut off, so that a water hammer or a high water pressure is transmitted from the first valve 130 (raw water shutoff valve) to the raw water flow passage WG. Is transmitted to the upstream side of.

As described above, the outer surface of the tip portion 170 faces the raw water flow passage WG. (See Figure 11). This water hammer or high water pressure acts on the tip portion 170, so that the water purification cartridge PC1 can swing. This rocking can occur each time the water discharge is switched. By this swinging, the sticking of the packings s1 and s2 can be suppressed.

As described above, the partition wall 190 is provided on the tip portion 170. The partition wall 190 is water impermeable. Further, the partition wall 190 is provided at a position intersecting the center line z1 of the water purification cartridge PC1. Therefore, the water hammer or high water pressure acting on the partition wall 190 can effectively swing the water purification cartridge PC1. Therefore, the sticking of the packings s1 and s2 can be effectively suppressed.

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

The center line of the partition wall 190 preferably coincides with the center line z1 of the water purification cartridge PC1, but may not 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, the pressure acting on the partition wall 190 can be effectively transmitted to the water purification cartridge PC1.

As described above, the concave portion 176 is provided on the outer surface of the tip portion 170. The recess 176 can efficiently capture a water hammer or high water pressure, as compared to a flat surface or the like having no recess. The recess 176 can promote the swing of the water purification cartridge PC1. Therefore, the sticking of the packings s1 and s2 can be effectively suppressed.

The raw water passage WG1 extends in the radial direction. By providing the concave portion 176, the water flow in the raw water passage WG1 extending along the radial direction can be effectively captured. The recessed portion 176 can effectively catch a water hammer or a high water pressure in the raw water passage WG1 extending in the radial direction.

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, a water hammer or a high water pressure applied to the bottom surface 180 may cause rocking in the axial direction. The side surface 178 extends in the axial direction. Therefore, the water hammer or high water pressure acting on the side surface 178 can cause the rocking in the radial direction. The swinging in the two directions can effectively prevent the packings s1 and s2 from sticking to each other.

In the above embodiment, O-rings are used as the annular packings s1 and s2. The O-ring has a circular cross-sectional shape. The cross-sectional shape of the annular packing may not be circular. For example, an O-ring having an elliptical cross section may be used as the annular packing. The annular packing is not limited to the O-ring. Further, the sectional shape of the annular packing is not limited. For example, as the annular packing, a square packing having a square cross section, a U packing having a U cross section, a V packing having a V cross section, a Y packing having a Y cross section, an X packing having a X cross section, or the like may be used. An O-ring is preferable, and an O-ring having a circular cross section is particularly preferable, from the viewpoints of suppressing sticking of the water purification cartridge and peripheral members to the annular packing and ensuring sealing property (watertightness).

The material of the connection end portion 152 may be resin or metal. From the viewpoint of cost, when the material is metal, the manufacturing method of the connection end portion 152 is preferably sintering, casting or forging. From the viewpoint of cost, resin is preferable to metal. Examples of this resin include a thermoplastic resin and a thermosetting resin. A thermoplastic resin that is easy to mold is preferable. From the viewpoint of moldability, polyoxymethylene (POM), polyphenylene sulfide (PPS), acrylonitrile butadiene styrene copolymer (ABS) and polypropylene (PP) are more preferable. From the viewpoint of moldability and cost, acrylonitrile butadiene styrene copolymer (ABS) and polypropylene (PP) are particularly preferable.

The material of the tip portion 170 may be resin or metal. From the viewpoint of cost, when the material is metal, the manufacturing method of the tip portion 170 is preferably sintering, casting or forging. From the viewpoint of cost, resin is preferable to metal. Examples of this resin include a thermoplastic resin and a thermosetting resin. A thermoplastic resin that is easy to mold is preferable. From the viewpoint of moldability, polyoxymethylene (POM), polyphenylene sulfide (PPS), acrylonitrile butadiene styrene copolymer (ABS) and polypropylene (PP) are more preferable. From the viewpoint of moldability and cost, acrylonitrile butadiene styrene copolymer (ABS) and polypropylene (PP) are particularly preferable.

In the water purification cartridge PC1 of the above embodiment, the intermediate portion 150 has the permeation portion 151 that allows water to permeate from the outer peripheral surface of the water purification cartridge PC1 to the inside. The configuration of the intermediate section 150 is not limited to this aspect. For example, the outer peripheral surface of the water purification cartridge PC1 may be formed of a non-water-permeable outer peripheral wall, and the permeation part may be provided inside the outer peripheral wall. In this case, inflow of water from the rear end of the water purification cartridge PC1 may be allowed. For example, an inlet may be provided at the upstream end (rear end) of the water purification cartridge PC1. The inlet may be provided in the rear forming portion 154. Water can flow into the water purification cartridge PC1 from this inflow port, pass through the permeation part, and reach the connection end part 152.

In the above-described embodiment, the water purification function unit is the permeation unit, and the purified water is generated by transmitting the raw water to the permeation unit. As mentioned above, this permeation|transmission part is only an example of a water purifying function part. The purified water may be generated without passing through the permeation part. For example, purified water may be produced by the water purification cartridge having a metal material and releasing metal ions having an effect of disinfection, antibacterial, sterilization, or bacteria growth inhibition from the metal material.

In the present application, purified water is a concept including the generated water in the following (1) and (2).
(1) Produced water from which substances or ions in water are removed by an adsorbent or a filtration membrane.
(2) Produced water in which water has a beneficial function by adding metal ions, electrons, substances, etc. to the water, for example, by adding metal ions to the water to impart functions such as sterilization to the water.

Specifically, the purified water in the present application is a concept including water generated by the following function A and/or function B. In other words, the water purification functional unit in the present application is a concept including a functional unit having the following function A and/or function B.

[Function A]
The function A is one or more functions selected from the group consisting of A1, A2, A3, A4, and A5 below.
A1: A function to adsorb and remove substances in water using an adsorbent such as activated carbon.
A2: A function of filtering a substance in water using a filter medium. Preferably, this filter medium is a filtration membrane such as a reverse osmosis membrane, an ultrafiltration membrane, a microfiltration membrane, a nanofiltration membrane, a porous hollow fiber membrane, and the function of filtering substances in water using this filtration membrane.
A3: A function of taking in and removing metal ions in water using an ion exchange resin or the like.
A4: A function of releasing metal ions having an effect of disinfecting, antibacterial, sterilizing, and/or suppressing the growth of bacteria from the metal material.
A5: A function of releasing metal ions from the metal material and generating active oxygen by incorporating electrons generated by the release of the metal ions into oxygen in water.

Examples of substances in water to be purified include chlorine, volatile organic compounds, pesticide substances, musty odor substances, and heavy metals. Preferably one or more selected from the group consisting of chlorine, volatile organic compounds, pesticides, musty odors and heavy metals are removed.

In addition, in this application, "chlorine" is a concept including 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 ion. Bound residual chlorine includes monochloramine, dichloramine and trichloramine. When chlorine gas is dissolved in water for the purpose of disinfecting water, these residual chlorine may be generated.

Examples of the volatile organic compound include chloroform, bromodichloromethane, dibromochloromethane, broloform, tetrachloroethylene, trichloroethylene, 1,1,1-trichloroethane, total trihalomethane and the like. It is preferred that one or more selected from the group consisting of chloroform, bromodichloromethane, dibromochloromethane, broloform, tetrachloroethylene, trichloroethylene, 1,1,1-trichloroethane, total trihalomethane be removed.

Examples of the pesticide substance include 2-chloro-4,6-bistylamino-1,3,5-triazine. 2-Chloro-4,6-bistylamino-1,3,5-triazine is preferably removed.

Examples of the musty odorous substance include 2-methylisoborneol, geosmin, and phenols. It is preferred that one or more selected from the group consisting of 2-methylisoborneol, geosmin and phenols be removed.

Examples of the heavy metal include lead, mercury, copper, arsenic and cadmium. Preferably one or more selected from the group consisting of lead, mercury, copper, arsenic and cadmium is removed.

Examples of the metal ion in the function A4 include zinc ion and silver ion. It is preferred that one or more selected from the group consisting of zinc ions and silver ions be released.

Examples of the bacterium having the function A4 include Escherichia coli and staphylococcus, and also include various fungi that are defined (included) as general bacteria. It is preferred that one or more of these bacteria be sterilized, antibacterial, sterilized, or growth inhibited.

The active oxygen in the function A5 can decompose organic substances such as bacteria. Examples of this bacterium include Escherichia coli and staphylococcus, and miscellaneous fungi that are defined (included) as general bacteria are also included. It is preferred that one or more of these bacteria be degraded.

From the viewpoint that chlorine and harmful substances can be effectively removed and the manufacturing cost of the water purification cartridge can be suppressed, the water purification cartridge having the function A1 is preferable. It should be noted that the water purification cartridge may have one or more functions selected from the functions A2, A3, A4 and A5 and the function A1.

[Function B]
Function B is attached to “Rix Purifier” in Appendix 2 (Article 2 related) of the miscellaneous goods quality display regulation (revised date: March 30, 2017/Effective date: April 1, 2017). It is a function to purify water by using specified filter media and/or media. In other words, the water purification cartridge is a “6 water purification system” in Appendix 2 (Article 2 related) of the General Industrial Goods Quality Indication Regulations (revised date: March 30, 2017/Effective date: April 1, 2017). It is preferable to include a water purification function unit for performing water purification using a filter medium and/or medium defined in "vessel".

The water purification functional unit having the function A and/or the function B may form a part of the water purification channel, may be arranged in the water purification channel, or may flow to the water purification channel. It may be arranged in the water pool.

The water purification cartridge may be an integral type in which the whole is inseparably integrated, or may be a composite type constituted by a plurality of members that can be separated from each other.

The composite type may be configured to include, for example, an adapter member and a cartridge main body. The adapter member may or may not be connectable to the cartridge body. 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 removably attached to the cartridge body or may be non-removably 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.

The configurations of the adapter member and the cartridge body are not limited, and may be any of the following configurations B1 to B4, for example.
B1: A configuration in which the adapter member is mounted on the cartridge mounting portion with the cartridge body mounted.
B2: A configuration in which the adapter member is first mounted in the cartridge mounting portion and then the cartridge body is mounted in the adapter member.
B3: A configuration in which the adapter member is mounted on a part of the cartridge mounting portion and the cartridge body is mounted on the other portion of the cartridge mounting portion.
B4: A configuration in which the adapter member is first mounted on a part of the cartridge mounting portion, and then the cartridge main body is mounted on the adapter member and the other portion of the cartridge mounting portion.

In the above configurations B1 to B4, the adapter member may be removably attached to the cartridge mounting portion or may be non-removably attached. The adapter member is preferably removably attached to the cartridge mounting portion.

Regarding the above-described embodiment, the following supplementary notes are disclosed.
[Appendix 1]
A water purification cartridge that is arranged in the water purification cartridge mounting portion of the water discharge head with a water purification function,
It has a connection end connected to the connection receiving part of the water purification cartridge mounting part,
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 packing is smaller than the outer diameter G2 of the second annular packing.
[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,
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 L1 and a straight line perpendicular to the straight line L1 is L2, the straight line L2 is The water purification cartridge according to Appendix 1, wherein the water purification cartridge is inclined so as to go radially outward as it goes downstream.
[Appendix 3]
3. The water purification cartridge according to appendix 1 or 2, wherein the water purification outlet hole penetrates in the axial direction.
[Appendix 4]
4. The water purification cartridge according to any one of appendices 1 to 3, wherein a sectional diameter D1 of the first annular packing is smaller than a sectional diameter D2 of the second annular packing.
[Appendix 5]
The connection end portion 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 larger than the cross-sectional diameter D1,
The width M2 of the second groove is larger than the cross-sectional diameter D2,
The water purification cartridge according to attachment 4, wherein the difference (M1-D1) is larger than the difference (M2-D2).
[Appendix 6]
It has a purification material that can remove chlorine,
The connection end has a non-water-permeable tip in which the first annular packing is arranged,
The material of the tip portion is a 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 channel,
The outer surface of the tip has a recess,
6. The water purification cartridge according to any one of appendices 1 to 5, wherein the cavity formed by the recess is present inside the first annular packing in the radial direction.
[Appendix 7]
Discharge port,
Raw water flow path,
A water purification channel,
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 arranged,
Has
The water purification cartridge mounting portion has a connection receiving portion for connecting to the water purification cartridge,
The water purification cartridge has a connection end connected to the connection receiving portion,
The connection end is
It has a purified water outlet hole, a first annular packing located on the downstream side of the purified water outlet hole, and a second annular packing located on the upstream side of the purified water outlet hole,
A water discharge head with a water purifying function, wherein the outer diameter of the first annular packing is smaller than the outer diameter of the second annular packing.
[Appendix 8]
A faucet device including the water discharge head with a water purifying function according to appendix 7.

The present application also describes other inventions not included in the inventions according to the claims (including independent claims). Each of the forms, members, configurations, etc. described in the claims and the embodiments of the present application is recognized as an invention based on the action and effect that each has.

Each form, member, configuration, etc. shown in each of the above-mentioned embodiments does not have to include all the forms, members, or configurations of these embodiments. It can be applied to all the inventions described.

102... Faucet device 104... Body part 106... Lever handle 108... Water discharge head 110... Water guide part 114... Operation part 134... Water purification cartridge mounting part 138... Connection Receiving part 152... Connection end part 154... Rear formation part 160... First cylindrical part 162... Second cylindrical part 164... Third cylindrical part 172... First groove 174... -Front end surface 176... Recessed portion 178... Recessed side surface 180... Recessed bottom surface 190... Partition wall 210... Second groove 240... Purified water outlet hole 242... Outlet opening edge 254・・・First receiving cylindrical portion 256 ・・・Second receiving cylindrical portion PC1 ・・・Water purification cartridge s1 ・・・First annular packing s2 ・・・Second annular packing WJ ・・・Water purification flow path WJ1 ・・・Clean water passage WG... Raw water passage WG1... Raw water passage

Claims (14)

A water purification cartridge that is arranged in the water purification cartridge mounting portion of the water discharge head with a water purification function,
A middle end, a rear forming part arranged at a rear end part of the middle part, a front end part, a water purification passage inside, and a connection end connected to a connection receiving part of the water purification cartridge mounting part. And has a section
The connection end is
A first annular packing,
A second annular packing located behind the first annular packing;
A first groove provided on the outer peripheral surface of the connection end portion and in which the first annular packing is arranged;
A second groove provided on the outer peripheral surface of the connection end portion and in which the second annular packing is arranged;
The water purification cartridge is mounted in the water purification cartridge mounting portion so as to be able to communicate with a water purification channel formed between the first annular packing and the second annular packing, separated from the raw water channel. Water purification outlet hole,
Has
A water purification cartridge in which the outer diameter G1 of the first annular packing is smaller than the outer diameter G2 of the second annular packing. The water purification cartridge according to claim 1, wherein a sectional diameter D1 of the first annular packing is smaller than a sectional diameter D2 of the second annular packing. The water purification cartridge according to claim 2, wherein the difference (D2-D1) is 0.1 mm or more and 1.0 mm or less. The water purification cartridge according to claim 2 or 3, wherein the ratio (D2/D1) is 1.05 or more and 2.0 or less. The width M1 of the first groove is larger than the cross-sectional diameter D1,
The width M2 of the second groove is larger than the cross-sectional diameter D2,
The water purification cartridge according to any one of claims 2 to 4, wherein the difference (M1-D1) is larger than the difference (M2-D2). When the difference (M1-D1) is W1 and the difference (M2-D2) is W2,
The water purification cartridge according to claim 5, wherein the difference (W1-W2) is 0.1 mm or more and 1.5 mm or less. When the difference (M1-D1) is W1 and the difference (M2-D2) is W2,
The water purification cartridge according to claim 5, wherein the difference (W2/W1) is 0.2 or more and 0.9 or less. The water purification cartridge according to any one of claims 1 to 7, wherein a width M1 of the first groove is larger than a width M2 of the second groove. The diameter of the bottom surface of the first groove changes depending on the axial position,
The water purification cartridge according to any one of claims 1 to 8, wherein the diameter of the bottom surface of the first groove is smaller on the downstream side than on the upstream side. The water purification cartridge according to any one of claims 1 to 9, comprising an adsorbent for adsorbing a substance in water. The water purification cartridge according to claim 10, wherein the adsorbent is activated carbon. The water purification cartridge according to any one of claims 1 to 11, comprising a filter medium for filtering substances in water. The filter medium is a filtration membrane,
The water purification cartridge according to claim 12, wherein the filtration membrane is a reverse osmosis membrane, an ultrafiltration membrane, a microfiltration membrane, a nanofiltration membrane or a porous hollow fiber membrane. The water purification cartridge according to any one of claims 10 to 13, wherein the substance in the water is one or more selected from the group consisting of chlorine, volatile organic compounds, pesticide substances, musty odor substances, and heavy metals.

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