JP2020026623A - Mixing faucet - Google Patents

Abstract

To provide a mixing faucet capable of improving the assemblability while suppressing the elution of harmful metals.SOLUTION: The mixing faucet according to an embodiment comprises an enclosure member and an internal flow path member. The enclosure member is a metal tubular member forming a faucet shell. The internal flow path member is a resin part forming a flow path inside thereof being inserted in the enclosure member. The internal flow path member includes a body and a lid. The body includes a hot-cold water mixing unit for mixing cold water and hot water and a flow adjustment unit for adjusting the flow rate of hot-cold water mixed by the hot-cold water mixing unit. The lid is attached to the outer peripheral surface of the body, and in the sate being attached to the body, a part of the flow path is formed between the outer peripheral surface of the body and the same to complete the flow path with the internal flow path member.SELECTED DRAWING: Figure 4B

Description

  An embodiment of the disclosure relates to a hot and cold water mixing faucet.

  Conventionally, there has been known a structure in which a resin internal flow path member is inserted into a metal cylindrical outer member in a hot water mixing faucet that discharges hot water from a water discharge port by adjusting a mixing amount and a discharging amount of hot water. (For example, see Patent Document 1).

JP 2002-228040 A

  By the way, in the structure in which the resin-made internal flow path member is inserted into the cylindrical outer flow path member, a part of the flow path is formed between the outer flow path member and the internal flow path member. A seal member is required between the road member. When there is a seal member between the outer shell member and the internal flow path member, it is necessary to compress the seal member with an appropriate fitting margin in order to maintain water tightness. In other words, it is necessary to compress the seal member when assembling. At this time, the compression direction of the seal member is the direction of the contact surface between the outer member and the inner flow path member, that is, the radial direction of the pipe (outer member). On the other hand, the insertion direction of the internal flow path member is the axial direction of the outer shell member, and since the compression direction and the insertion direction are different, there is a problem that the assemblability is extremely reduced.

  In addition, since a part of the flow path is formed between the outer member and the inner flow path member, when the outer member is formed of an alloy containing a harmful metal such as lead, it is becoming stricter worldwide. It may not be possible to meet certain elution regulations.

  An object of one embodiment of the present invention is to provide a hot and cold water mixing faucet that can improve assemblability while suppressing elution of harmful metals.

  A hot and cold water mixing faucet according to one aspect of the embodiment includes a metal cylindrical outer shell member forming an outer shell, and a resin internal flow path member inserted into the outer shell member and having a flow path formed therein. Wherein the internal flow path member is provided with a hot water mixing section for mixing water and hot water supplied from respective supply sources, and a flow rate adjusting section for adjusting a flow rate of the hot water mixed in the hot water mixing section. And a part of the flow path is formed between the main body and the outer peripheral surface of the main body when the main body is mounted on the main body, and the internal flow path member completes the flow path. And a lid that allows the lid to be provided.

  According to this configuration, since the flow path is completed by the internal flow path member, the outer member does not come into contact with water in a state where the inner flow path member is housed in the outer member. For this reason, there is no need to seal between the outer shell member and the inner flow path member with a seal member or the like. As described above, since the harmful metal is prevented from being eluted by preventing the outer shell member from being in contact with water, the sealing member is not required to be compressed when the internal flow path member is inserted, so that the assemblability can be improved.

  In addition, when trying to complete the flow path with the internal flow path member, the flow path becomes complicated, the diameter of the internal flow path member becomes large due to manufacturing problems such as die removal, and the entire faucet becomes large. Although there is a possibility that the internal flow path member is composed of two members, the main body and the lid, it is possible to suppress an increase in size due to a manufacturing problem.

  Further, the lid is regulated in a radial direction of the internal flow path member while being attached to the main body.

  According to this configuration, the lid is restricted in the radial direction of the internal flow path member while being attached to the main body, so that the lid can be prevented from coming off.

  Further, the flow path between the main body and the lid has a concave portion formed on the outer peripheral surface of the main body.

  According to this configuration, the flow path between the main body and the lid can be formed with a simple configuration.

  Further, the lid has one engaging portion, and the main body has the other engaging portion which engages with the one engaging portion in a state where the lid is attached to the main body. It is characterized by.

  According to such a configuration, the lid is positioned with respect to the main body by the engagement of the one and the other engagement portions, and the lid can be easily attached to a correct position.

  Further, a seal member provided between the main body and the lid body is further provided, and the seal member is allowed to be displaced in a radial direction of the internal flow path member.

  According to this configuration, displacement in the radial direction of the internal flow path member is allowed, and for example, even when the lid moves outward in the radial direction of the internal flow path member due to the water pressure in the flow path, the sealing performance is ensured. be able to. This can prevent water or the like from leaking out of the faucet.

  According to one aspect of the embodiment, assemblability can be improved.

FIG. 1 is a perspective view of a hot and cold water mixing faucet. FIG. 2 is a front view of the hot and cold water mixing faucet. FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4A is an explanatory diagram (part 1) of a flow channel. FIG. 4B is an explanatory diagram (part 2) of the flow path. FIG. 5 is a perspective view of the internal flow path unit. FIG. 6 is an exploded perspective view of the internal flow path member. FIG. 7 is a perspective view of the lid. FIG. 8 is an explanatory diagram of the sealing structure of the lid.

  Hereinafter, an embodiment of a hot and cold water mixing faucet disclosed in the present application will be described in detail with reference to the accompanying drawings. The present invention is not limited by the embodiments described below.

<Overall configuration of hot and cold water mixing faucet 1>
First, the overall configuration of the hot and cold water mixing faucet 1 will be described with reference to FIGS. FIG. 1 is a perspective view of a hot and cold water mixing faucet 1. FIG. 2 is a front view of the hot and cold water mixing faucet 1. FIG. 3 is a sectional view taken along line III-III in FIG. 1 to 3 show a three-dimensional orthogonal coordinate system including a Z-axis having a vertically upward direction as a positive direction for convenience of description. The rectangular coordinate system may be illustrated in other figures.

  In the rectangular coordinate system, the positive direction of the X axis is defined as “left”, the negative direction of the X axis is defined as “right”, the positive direction of the Y axis is defined as “forward”, and the negative direction of the Y axis is defined. The direction is defined as "rearward". In the orthogonal coordinate system, the positive direction of the Z axis is defined as “up”, and the negative direction of the Z axis is defined as “down”. Therefore, in the following description, the X-axis direction may be referred to as the left-right direction, the Y-axis direction may be referred to as the front-back direction, and the Z-axis direction may be referred to as the up-down direction.

  As shown in FIGS. 1 to 3, the hot and cold water mixing faucet 1 includes an outer shell member 2, a temperature adjustment handle 3, a flow rate adjustment handle 4, an internal flow path unit 5, a water discharge pipe 6, and a hand shower (not shown). (Shown). The hot and cold water mixing faucet 1 discharges mixed water obtained by mixing water and hot water, or water from a water discharge pipe 6 or a hand shower.

  The outer shell member 2 has a cylindrical shape, forms the outer shell of the faucet body, and extends in the left-right direction. The outer member 2 is formed of a metal member. The outer member 2 has an inner peripheral surface 2a having a circular cross section orthogonal to the left-right direction. The axial direction of the outer shell member 2 matches the left-right direction. The outer shape of the outer member 2 is not limited to a cylindrical shape, but may be, for example, a rectangular shape.

  An inner channel unit 5 described later is inserted into the outer shell member 2. An insertion hole for attaching the water discharge pipe 6 to the internal flow path unit 5 from below is formed in the outer member 2 near the center in the left-right direction. An insertion hole for attaching the shower hose 7 of the hand shower to the internal flow path unit 5 from the rear is formed in the outer member 2 near the center in the left-right direction.

  A hot water supply pipe 8 is attached to one of the left and right ends (for example, the left end) of the outer shell member 2 from behind. A water supply pipe 9 is attached to the left or right other end (for example, the right end) of the outer member 2 from the rear.

  A temperature adjustment handle 3 is attached to one of the left and right ends (for example, the left end) of the outer member 2. In addition, a flow rate adjustment handle 4 is attached to one of the right and left ends (for example, the right end) of the outer member 2.

  The temperature adjustment handle 3 is attached to the outer member 2 so as to be rotatable around a left-right axis (a central axis of the outer member 2). The temperature adjustment handle 3 switches the type of fluid discharged from the water discharge pipe 6 or the hand shower to water or mixed water according to the rotation position. Specifically, the temperature adjustment handle 3 switches whether or not to mix hot water with water. The temperature adjustment handle 3 sets the temperature of the mixed water according to the rotation position when the mixed water is discharged from the water discharge pipe 6 or the hand shower.

  The flow rate adjustment handle 4 is attached to the outer member 2 so as to be rotatable around a left-right axis. The flow rate adjustment handle 4 switches the water discharge destination of the water or the mixed water to the water discharge pipe 6 or the hand shower according to the rotation position. The flow adjustment handle 4 adjusts the flow rate of water or mixed water discharged from the water discharge pipe 6 or the hand shower according to the rotation position.

<Internal channel unit 5>
Next, the internal flow path unit 5 will be described with reference to FIGS. 4A and 4B are explanatory diagrams of the flow path R. FIG. 4B is an enlarged view of a portion A in FIG. 4A. FIG. 4B shows a second flow path Rb2 of the water introduction flow path Rb. FIG. 5 is a perspective view of the internal flow path unit 5.

  The internal flow path unit 5 supplies the water supplied from the water supply pipe 9 to the inner peripheral surface 2a of the outer member 2 and the outer peripheral surface of the internal flow path unit 5 (the outer peripheral surface 51a of the main body 51 of the internal flow path member 50 described later). ) Is a unit that flows without passing through the space. That is, the internal flow path unit 5 is a unit in which the flow path R is completed inside. As shown in FIG. 3, the internal flow path unit 5 includes an internal flow path member 50, a temperature adjustment mechanism (water / water mixing unit 60), and a flow rate adjustment mechanism (flow rate adjustment unit 70).

  The internal flow path member 50 includes a main body 51, a lid 52, and a seal member 53. The main body 51 is formed in a cylindrical shape in accordance with the inner peripheral surface 2 a of the outer casing member 2. Inside the main body 51, a hot and cold water mixing section 60 as a temperature adjusting mechanism and a flow rate adjusting section 70 as a flow rate adjusting mechanism are provided. The lid 52 is attached to the outer peripheral surface 51a of the main body 51. The seal member 53 is provided between the main body 51 and the lid 52. The internal flow path member 50 will be described later with reference to FIGS.

  The hot and cold water mixing section 60 mixes water and hot water supplied from respective supply sources. The hot and cold water mixing section 60 includes a temperature-sensitive spring 61, a bias spring 62, a valve body 63, a liner 64, and a spindle 65.

  The temperature-sensitive spring 61 is housed in a first support case 66 provided at the center in the left-right direction. The temperature-sensitive spring 61 is a spring whose spring constant changes according to the temperature, and is made of, for example, a shape memory alloy. The temperature sensing spring 61 urges a valve body 63 described later toward one of left and right (leftward).

  The bias spring 62 is housed in a second support case 67 provided on the left side of the first support case 66. The bias spring 62 is provided in a water discharge channel Rc (see FIG. 4A) described later. The bias spring 62 is a spring whose spring constant is substantially constant with respect to temperature. The bias spring 62 urges the valve body 63 toward either the left or right (rightward).

  The valve body 63 is provided between the first support case 66 and the second support case 67. The valve body 63 is supported by the main body 51 via an isolation wall 68 so as to be slidable in the left-right direction. The isolation wall 68 isolates a hot water introduction flow channel Ra and a water introduction flow channel Rb described later in the left-right direction. The valve body 63 has a through hole (not shown) penetrating in the left-right direction.

  The valve body 63 moves in the left-right direction according to the urging force of the temperature-sensitive spring 61 and the urging force of the bias spring 62, and adjusts the state of communication between the hot water introduction passage Ra and the water discharge passage Rc. Specifically, when the urging force of the temperature-sensitive spring 61 is larger than the urging force of the bias spring 62, the valve body 63 moves to the left. When the valve body 63 moves to the left and comes into contact with the first support case 66, the communication between the hot water introduction passage Ra and the water discharge passage Rc is interrupted, and the hot water does not flow into the water discharge passage Rc.

  When the biasing force of the bias spring 62 is larger than the biasing force of the temperature-sensitive spring 61, the valve body 63 moves to the right. For example, when the biasing force of the bias spring 62 is increased from a state where the valve body 63 is in contact with the first support case 66 and the valve spring 63 is separated from the first support case 66, the hot water introduction flow path Ra and the water discharge flow path Rc communicate with each other. Then, hot water flows into the water discharge channel Rc.

  When the valve body 63 is separated from the first support case 66, the valve body 63 is held at a position where the biasing force of the temperature-sensitive spring 61 and the biasing force of the bias spring 62 are balanced. As the distance between the valve body 63 and the first support case 66 increases, the amount of hot water flowing into the water discharge channel Rc increases. Further, as the distance between the valve body 63 and the first support case 66 increases, the distance between the valve body 63 and the second support case 67 decreases, and the amount of water flowing into the water discharge passage Rc decreases.

  The liner 64 is in contact with the end of the bias spring 62 opposite to the valve body 63, and is connected to the temperature adjustment handle 3 via the spindle 65. The spindle 65 is rotatably supported by the second support case 67 and converts the rotational movement of the temperature adjustment handle 3 into a linear movement of the liner 64 in the left-right direction. For this reason, the liner 64 moves in the left-right direction according to the rotation of the temperature adjustment handle 3.

  In the hot and cold water mixing section 60, the liner 64 moves in the left-right direction in accordance with the turning position of the temperature adjustment handle 3. That is, the hot and cold water mixing section 60 can change the position of the valve body to a position where the urging force of the temperature-sensitive spring 61 and the urging force of the bias spring 62 are balanced in accordance with the turning position of the temperature adjustment handle 3. Thereby, the hot and cold water mixing section 60 can set the temperature of the mixed water to the set temperature according to the turning position of the temperature adjustment handle 3 when discharging the mixed water.

  When the mixed water is discharged, for example, when the temperature of the hot water changes and the temperature of the mixed water changes, the temperature-sensitive spring 61 expands and contracts in accordance with the temperature of the mixed water, and the valve body 63 moves in the left and right direction, The balance position of the valve body 63 is automatically changed. Thereby, the amount of hot water and the amount of water flowing into the water discharge passage Rc are adjusted, and the temperature of the mixed water is automatically adjusted.

  The flow rate adjusting unit 70 includes a rotating shaft 71 and a switching valve 72. The rotation shaft 71 is housed in the support case 73 and is rotatably supported by the support case 73. One of the left and right ends (right end) of the rotating shaft 71 is connected to the flow adjustment handle 4, and the other end is connected to the switching valve 72.

  The switching valve 72 is provided in the water discharge channel Rc. The switching valve 72 has a bottomed cylindrical shape, rotates in accordance with the rotation of the flow adjustment handle, and slides on the inner peripheral surface 51 b of the main body 51. The switching valve 72 is provided to face two openings formed in the main body 51, that is, a first opening 511 and a second opening (not shown). Here, the first opening 511 is, for example, a water discharge port leading to the shower hose 7, and the second opening is, for example, a water discharge port leading to the water discharge pipe 6.

  The switching valve 72 has a communication port (not shown). When the switching valve 72 rotates in accordance with the rotation of the flow rate adjustment handle 4, the communication port communicates with the first opening 511 or the second opening.

  When the flow adjustment handle 4 is at the predetermined water stop position, the communication port does not communicate with the first opening 511 and the second opening. Therefore, when the flow adjustment handle 4 is at the predetermined water stop position, water or mixed water is not discharged from the water discharge pipe 6 and the hand shower.

  When the flow adjustment handle 4 is rotated rearward from the water stop position, for example, the communication port communicates with the first opening 511 (a water discharge port communicating with the shower hose 7). Thereby, the water or the mixed water flows into the shower hose 7 from the first opening 511 and is discharged from the hand shower.

  When the flow adjustment handle 4 is rotated forward from the water stop position, for example, the communication port communicates with the second opening (water outlet communicating with the water discharge pipe 6). Thereby, the water or the mixed water flows into the water discharge pipe 6 from the second opening, and is discharged from the water discharge pipe 6.

  The switching valve 72 can change the area where the communication port communicates with the first opening 511 or the second opening in accordance with the rotation position of the flow adjustment handle 4. That is, the flow rate adjusting unit 70 can adjust the flow rate of water or mixed water discharged from the water discharge pipe 6 or the hand shower in accordance with the rotation position of the flow rate adjustment handle 4.

  As shown in FIGS. 4A and 4B, a flow path R (see FIG. 3) through which the hot water W1, the water W2, or the mixed water W3 flows is formed in the internal flow path unit 5. That is, the flow path R includes a hot water introduction flow path Ra, a water introduction flow path Rb, and a water discharge flow path Rc.

  Hot water W <b> 1 supplied from the hot water supply pipe 8 flows through the hot water introduction flow path Ra via the first connection member 11. The hot water introduction flow path Ra is formed by the main body 51, the valve body 63 of the hot and cold water mixing section 60, the first support case 66, the second support case 67, and the partition wall 68 (all shown in FIG. 3). You.

  The water W2 supplied from the water supply pipe 9 through the second connection member 12 flows through the water introduction flow path Rb. The water introduction channel Rb includes a first channel Rb1, a second channel Rb2, and a third channel Rb3. The first flow path Rb1 is formed by the main body 51 and the support case 73 of the flow rate adjusting unit 70 (in each case, see FIG. 3), and water W2 flows in from the second connection member 12.

  The second flow path Rb2 communicates with the first flow path Rb1 and the third flow path Rb3. The second flow path Rb2 is formed by a concave portion 512 formed near the front center of the outer peripheral surface 51a of the main body 51 and an inner peripheral surface 52a of the lid 52 covering the concave portion 512.

  The second flow path Rb2 communicates with the first flow path Rb1 through an inflow hole 513 formed at one of the right and left (right) bottoms of the concave portion 512, and water W2 flows in from the first flow path Rb1. . Further, the second flow path Rb2 communicates with the third flow path Rb3 through an outflow hole 514 formed at the bottom of one of the right and left sides (left side) of the concave portion 512, and the water W2 flows through the third flow path Rb3. Let out.

  The third flow path Rb3 is formed by the main body 51, the first support case 66 of the hot and cold water mixing section 60, the valve body 63, and the isolation wall 68 (all shown in FIG. 3). The third flow path Rb3 is formed to be adjacent to the hot water introduction flow path Ra with the isolation wall 68 interposed therebetween in the left-right direction.

  The water discharge channel Rc is formed by the first support case 66, the second support case 67, and the like of the hot and cold water mixing section 60, on the radially inner side of the main body 51 with respect to the hot water inlet channel Ra and the water inlet channel Rb. The water discharge channel Rc communicates with the third channel Rb3 of the water introduction channel Rb, and water flows in from the third channel Rb3.

  Further, the water discharge channel Rc can communicate with the hot water introduction channel Ra by moving a valve of the hot water mixing section 60 in accordance with the rotation of the temperature adjustment handle 3. The water discharge channel Rc communicates with the hot water introduction flow channel Ra, and when the hot water W1 flows in from the hot water introduction flow channel Ra, mixes the water W2 and the hot water W1 to generate a mixed water W3.

  The water discharge channel Rc can communicate with the shower hose 7 through a first opening 511 formed in the main body 51 near the center in the left-right direction. The water discharge channel Rc can communicate with the water discharge pipe 6 through a second opening (not shown) formed in the main body 51 near the center in the left-right direction. In addition, the above-described switching valve 72 that opens and closes the first opening 511 and the second opening is provided in the water discharge channel Rc.

  The members constituting the hot water introduction passage Ra, the water introduction passage Rb, and the water discharge passage Rc are provided with seal members so that water does not leak from the passages Ra, Rb, Rc.

  Further, as shown in FIG. 5, the internal flow passage unit 5 is inserted into the outer casing member 2. Here, “insertion” refers to pushing the internal flow path unit 5 in the axial direction of the outer member 2 while receiving frictional resistance from the inner peripheral surface 2 a of the outer member 2. When the internal flow path unit 5 is inserted into the outer casing member 2, the lid 52 is provided on the outer peripheral face 51 a of the main body 51 of the inner flow path member 50 by the inner peripheral face 2 a of the outer casing member 2 in the radial direction of the main body 51. The body 51 is pressed inward, and the movement of the main body 51 outward in the radial direction is restricted.

<Internal flow path member 50>
Next, the internal flow path member 50 will be described with reference to FIGS. FIG. 6 is an exploded perspective view of the internal flow path member 50. FIG. 7 is a perspective view of the lid 52. As shown in FIG. 6 and as described above, the internal flow path member 50 is a resin member, and includes a main body 51, a lid 52, and a seal member 53. The main body 51 has a cylindrical shape, and a rib-shaped convex portion 515 is provided on the outer peripheral surface 51a. The protrusion 515 includes, for example, a protrusion extending in the circumferential direction of the main body 51 and a protrusion extending in the axial direction of the main body 51.

  In the main body 51, a concave portion 512 is formed near the center in the left-right direction of the outer peripheral surface 51a. The concave portion 512 has a rectangular shape whose longitudinal direction extends along the left-right direction. An inflow hole 513 of water is formed on one of the right and left sides (right side) and an outflow hole 514 of water is formed on one of the left and right sides (left side) of an inner surface (hereinafter, referred to as a “bottom surface”) 512 a of the concave portion 512. Is done. As described above, the water flowing into the concave portion 512 from the inflow hole 513 flows in the left-right direction and flows out from the outflow hole 514.

  An engagement projection 516 is provided on the bottom surface 512a of the recess 512 near the center in the left-right direction. The engagement convex portion 516 has a substantially rectangular block shape whose longitudinal direction extends along the left-right direction. As described above, since the longitudinal direction of the engagement protrusion 516 is along the left-right direction, the engagement protrusion 516 is less likely to hinder the flow of water. The engagement projection 516 engages with the cylindrical portion 521 of the lid 52 when the lid 52 described below is attached.

  A projection 517 is provided around the recess 512 on the outer peripheral surface 51a of the main body 51. The main body 51 is preferably formed of a high-strength resin such as PPS (polyphenylene sulfide).

  The lid 52 is attached to the main body 51 so as to cover the concave portion 512 on the outer peripheral surface 51a of the main body 51. The lid 52 has a plate shape, and is curved in accordance with the outer peripheral surface 51 a of the main body 51 in a state where the lid 52 is attached to the main body 51. The cover 52 covers the concave portion 512 in a state where the cover 52 is attached to the main body 51, so that the lid 52 is provided between the outer peripheral surface 51 a of the main body 51 and the water introduction flow path Rb which is a part of the flow path R (see FIG. 3). The second flow path Rb2 (see FIG. 4B) is formed.

  As shown in FIG. 7, the lid 52 is provided with a tubular portion 521 near the center in the left-right direction. When the lid 52 is attached to the main body 51, the cylindrical portion 521 engages with the engaging convex portion 516 by fitting the engaging convex portion 516 of the concave portion 512 into the cylindrical portion 521. That is, the cylindrical portion 521 is one of the engaging portions (also referred to as “engaging concave portion”), and is engaged with the engaging convex portion 516 which is the other engaging portion, so that the lid 51 Position 52. Note that the one engaging portion and the other engaging portion may be configured with the concavities and convexities reversed, and the main body 51 is provided with a cylindrical portion (engaging concave portion), and the lid 52 is provided with an engaging convex portion. You may be.

  An arm 522 extending outward from the lid 52 is provided on the outer peripheral edge of the lid 52. The arm 522 has a hole 522a. The arm 522 holds the lid 52 on the main body 51 when the projection 517 of the main body 51 enters the hole 522 a when the lid 52 is attached to the main body 51. Note that, unlike the main body 51, which preferably has high strength, the lid 52 may be formed of a resin having low strength.

  As shown in FIG. 6, the seal member 53 is made of a soft resin and is formed in an annular shape. The seal member 53 has a circular cross section. As described above, the seal member 53 is provided between the main body 51 and the lid 52, and seals between the outer peripheral surface 51 a (recess 512) of the main body 51 and the inner peripheral surface 52 a of the lid 52. The seal member 53 is attached to the inner peripheral edge of the lid 52.

  In addition, displacement of the seal member 53 in the radial direction of the internal flow path member 50 is allowed. That is, even if the sealing member 53 moves in the radial direction of the internal flow path member 50 in a state where the lid 52 is attached to the main body 51, the sealing property is ensured.

<Seal structure of lid 52>
Here, the sealing structure of the lid 52 will be described with reference to FIG. FIG. 8 is an explanatory diagram of the sealing structure of the lid 52. FIG. 8 schematically shows a cross section of the main body 51, the lid 52, and the seal member 53.

  As shown in FIG. 8, when the lid 52 is attached to the main body 51, the seal member 53 seals between the bottom surface 512 a of the concave portion 512 and the inner side surface 512 b of the concave portion 512. Further, as shown by a two-dot dashed line in the figure, the sealing member 53 seals the gap between the inner surface 512b of the concave portion 512 even when the lid 52 moves in the radial direction of the internal flow path member 50. .

  As described above, since the displacement of the seal member 53 in the radial direction of the internal flow path member 50 is allowed, for example, the lid body 52 is moved by the water pressure in the second flow path Rb2 (see FIG. 4B). , The sealing performance can be ensured even when it moves outward in the radial direction. This can prevent water or mixed water from leaking out of the faucet.

  As described above, in the hot and cold water mixing faucet 1 according to the embodiment, since the flow path R is completed by the internal flow path member 50, the internal flow path member 50 is inserted into the outer casing member 2. The outer shell member 2 does not come into contact with water. For this reason, there is no need to seal the space between the outer shell member 2 and the inner flow path member 50 with a seal member or the like. As described above, since the harmful metal is prevented from being eluted by preventing the outer shell member 2 from coming into contact with water, the sealing member is not required to be compressed at the time of assembly, that is, at the time of insertion of the internal flow path member 50, so that assemblability is reduced. Can be improved.

  Further, when the flow path R is to be completed by the internal flow path member 50, the flow path R becomes complicated, and the diameter of the internal flow path member 50 becomes large due to a manufacturing problem such as removal of a mold, and the entire faucet becomes large. The internal flow path member 50 is composed of the main body 51 and the lid 52 which is a separate member with respect to the main body 51, thereby suppressing an increase in size due to a manufacturing problem. be able to.

  Further, there is a possibility that the lid 52 may come off from the main body 51 due to the water pressure in the second flow path Rb2 of the water introduction flow path Rb between the main body 51 and the lid 52. By restricting the body 52 in the radial direction of the internal flow path member 50, the lid 52 can be prevented from coming off.

  Further, the second flow path Rb2 of the water introduction flow path Rb between the main body 51 and the lid 52 is formed by the concave portion 512 formed on the outer peripheral surface 51a of the main body 51, thereby simplifying the second flow path Rb2. It can be formed with a simple configuration.

  Further, the engagement of the engaging projection 516 of the concave portion 512 on the main body 51 with the cylindrical portion 521 on the lid 52 positions the lid 52 with respect to the main body 51, and moves the lid 52 to the correct position. Can be easily installed.

  In the above-described embodiment, the second flow path Rb2 of the water introduction flow path Rb is formed by the concave portion 512 of the outer peripheral surface 51a of the main body 51 and the inner peripheral surface 52a of the lid 52. A channel extending in the left-right direction is formed on the body 52 side, and such a channel may be used as the second channel Rb2.

  In the above-described embodiment, the hot water is supplied from the left hot water supply pipe 8 and the water is supplied from the right water supply pipe to the internal flow path unit 5, but for example, the water is supplied from the right. The hot water may be supplied from the left side. In this case, hot water flows through a flow path formed by the concave portion 512 of the main body 51 and the inner peripheral surface 52 a of the lid 52.

  In the above-described embodiment, the first opening 511 and the second opening (not shown) communicating with the switching valve 72 provided in the water discharge channel Rc are arranged side by side on substantially the same axis when viewed from the front. , The first opening 511 and the second opening may be arranged to be shifted in the left-right direction. In this case, the switching valve 72 extends in the left-right direction so as to be able to communicate with both the first opening 511 and the second opening.

  Further effects and modifications can be easily derived by those skilled in the art. For this reason, the broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Hot water mixing faucet 2 Outer member 50 Inner flow path member 51 Main body 51a Outer peripheral surface 512 Concave part 516 The other engaging part 52 Lid body 521 One engaging part 53 Seal member 60 Hot water mixing part 70 Flow rate adjusting part R flow path

Claims (5)

A metal cylindrical outer shell member forming an outer shell,
A resin-made internal flow path member inserted into the outer shell member and having a flow path formed therein;
The internal flow path member,
A body provided with a hot water mixing section for mixing water and hot water supplied from respective supply sources and a flow rate adjusting section for adjusting a flow rate of hot water mixed in the hot water mixing section,
A lid which is attached to the outer peripheral surface of the main body, forms a part of the flow path between the outer peripheral surface of the main body in a state attached to the main body and completes the flow path with the internal flow path member A hot and cold water mixing faucet comprising: a body;   The hot and cold water mixing faucet according to claim 1, wherein the lid is regulated in a radial direction of the internal flow path member while being attached to the main body.   The hot and cold water mixing faucet according to claim 1, wherein a flow path between the main body and the lid has a concave portion formed on the outer peripheral surface of the main body. The lid has one engagement portion,
The said main body has the other engagement part which engages with the said one engagement part in the state in which the said lid was attached to the said main body, The Claims any one of Claims 1-3 characterized by the above-mentioned. Hot water mixing faucet. Further comprising a seal member provided between the main body and the lid,
The hot-water mixing faucet according to any one of claims 1 to 4, wherein the seal member is allowed to be displaced in a radial direction of the internal flow path member.