JP2020026631A - Mixing faucet - Google Patents

Abstract

To provide a mixing faucet capable of improving thermal insulation performance.SOLUTION: A 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 that has a flow path inside and which has a convex part in contact with the inner peripheral surface of the enclosure member on the outer peripheral surface in a state being inserted into the enclosure member when inserted into the enclosure member.SELECTED DRAWING: Figure 5

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 channel member is inserted into the cylindrical outer member, since a part of the channel is formed between the outer member and the internal channel member, the outer member is made of lead or the like. When it is formed of an alloy containing harmful metals, there is a possibility that it may not be able to comply with the elution regulations that are becoming stricter worldwide.

  Therefore, the present inventors have devised a structure in which the elution of the metal component from the outer member is suppressed by completing the flow path with the internal flow path member made of resin. However, when the flow path is completed by the internal flow path member, the outer peripheral surface of the internal flow path member comes in contact with the outer peripheral surface of the outer flow path member in a state where the internal flow path member is inserted into the outer flow path member, and the heat of the internal flow path member is reduced There is a need to improve the heat insulating properties because the heat is easily transmitted to the members.

  An object of one embodiment of the present invention is to provide a hot and cold water mixing faucet capable of improving heat insulation.

  The hot and cold water mixing faucet according to an aspect of the embodiment has a metal cylindrical outer shell member forming an outer shell, and has a flow path therein, and is inserted into the outer shell member and inserted into the outer shell member. A resin internal flow path member having a projection on the outer peripheral surface that is in contact with the inner peripheral surface of the outer member.

  According to this configuration, a space is formed between the inner peripheral surface of the outer member and the outer peripheral surface of the inner channel member in a state where the inner flow member is inserted into the outer member, and the formed space is a layer of air. (Heat insulation layer), so that heat insulation can be improved.

  In addition, since the convex portion is in contact with the inner peripheral surface of the outer shell member in a state where the inner flow path member is inserted into the outer shell member, rattling can be reduced. Further, since the contact resistance with the inner peripheral surface of the outer casing member is small, the internal flow path member can be easily inserted. Thereby, assemblability can be improved.

  Further, the projection is formed in a linear shape on the outer peripheral surface.

  According to such a configuration, since the convex portion makes linear contact with the inner peripheral surface of the outer member, concentration of stress can be reduced, and durability can be improved.

  The convex portion extends in a circumferential direction of the internal flow path member on the outer peripheral surface, and the outer flow path member is not in contact with the inner peripheral surface of the outer flow path member in a state where the inner flow path member is inserted into the outer peripheral member. Characterized by having a portion.

  According to such a configuration, by providing a portion that does not come into contact with the inner peripheral surface of the outer casing member on the convex portion extending in the circumferential direction of the internal flow passage member, local convection due to heat convection in the axial direction of the internal flow passage member is provided. Temperature rise can be suppressed.

  According to one aspect of the embodiment, heat insulation 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. 7A is a front view of the main body. FIG. 7B is a rear view of the main body. FIG. 7C is a plan view of the main body.

  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. 6, 7A to 7C.

  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 so as to be directed to two openings 511 formed in the main body 51, that is, a first opening 511a and a second opening 511b (all refer to FIGS. 7A to 7C). Here, the first opening 511a is, for example, a water discharge port leading to the shower hose 7, and the second opening 511b 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 adjusting handle 4, the communication port communicates with the first opening 511a or the second opening 511b.

  When the flow adjustment handle 4 is at the predetermined water stop position, the communication port does not communicate with the first opening 511a and the second opening 511b. 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 511a (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 511a, 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 511b (water discharge port 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 511b, 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 511a or the second opening 511b in accordance with the turning 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 511a (see FIGS. 7A to 7C) 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 511b (see FIGS. 7A to 7C) formed in the main body 51 near the center in the left-right direction. The above-described switching valve 72 that opens and closes the first opening 511a and the second opening 511b 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. 6 and 7A to 7C. FIG. 6 is an exploded perspective view of the internal flow path member 50. FIG. 7A is a front view of the main body 51. FIG. FIG. 7B is a rear view of the main body 51. FIG. 7C is a plan view of the main body 51. As shown in FIGS. 6 and 7A to 7C and as described above, the internal flow path member 50 is a member made of resin, and includes a main body 51, a lid 52, and a seal member 53. The main body 51 has a cylindrical shape, and a linear (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 (a protrusion 515a) and a protrusion extending in the axial direction of the main body 51 (a protrusion 515b).

  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). Further, the main body 51 has the protrusions 515a and 515b on the outer peripheral surface 51a as described above. A plurality of protrusions 515a extending in the circumferential direction of the main body 51 are provided side by side at predetermined intervals in the left-right direction (axial direction of the main body 51). The convex portion 515a comes into contact with the inner peripheral surface 2a of the outer casing member 2 in a state where the inner flow path member 50 is inserted into the outer casing member 2.

  A plurality of convex portions 515b extending in the axial direction of the main body 51 are provided in a line in the circumferential direction of the main body 51 at predetermined intervals. The protrusions 515b are arranged so as to have a phase difference of 90 degrees in the circumferential direction of the main body 51, for example. Also in the convex portion 515b, the inner flow path member 50 comes into contact with the inner peripheral surface 2a of the outer member 2 in a state where the inner flow member 50 is inserted into the outer member 2.

  Further, a flat portion is formed around a portion where the convex portion 515a extending in the circumferential direction and the convex portion 515b extending in the axial direction intersect and around the intersecting portion so that the height is lower than other portions. 518 are provided. The flat portion 518 serves as a non-contact portion with the inner peripheral surface 2a of the outer member 2 when the inner flow path member 50 is inserted into the outer member 2.

  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. 6, 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 protrusion 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 when the seal 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 seal member 53 seals the gap between the inner surface of the concave portion 512 and the seal member 53. Is secured.

  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, according to the hot and cold water mixing faucet 1 according to the embodiment, the convex portion 515 (515a, 515b) is provided on the outer peripheral surface 51a of the main body 51, so that the inner channel member 50 Is inserted, a space is formed between the inner peripheral surface 2a of the outer shell member 2 and the outer peripheral surface 51a of the main body 51, and the formed space becomes an air layer, that is, a heat insulating layer. Can be improved.

  In addition, since the protrusion 515 is in contact with the inner peripheral surface 2a of the outer casing member 2 in a state where the inner flow path member 50 is inserted into the outer casing member 2, it is possible to reduce the backlash of the inner flow path member 50. it can. Further, since the contact resistance between the outer member 2 and the inner peripheral surface 2a is small, the internal flow path member 50 can be easily inserted. Thereby, assemblability can be improved.

  In addition, since the protrusions 515 (515a, 515b) are formed in a linear shape, the protrusions 515a, 515b make line contact with the inner peripheral surface 2a of the outer casing member 2. Therefore, the concentration of stress can be reduced, and the durability can be improved. Further, by forming the protrusions 515 (515a, 515b) in a linear shape (rib shape), the main body 51 can be reinforced, and the durability of the main body 51 can be improved.

  In addition, by providing a portion (flat portion 518) that does not come into contact with the inner peripheral surface 2a of the outer casing member 2 on the convex portion 515a extending in the circumferential direction of the main body 51, localization due to heat convection in the axial direction of the main body 51 is provided. Temperature rise can be suppressed. Similarly, by providing the flat portion 518 on the convex portion 515 b extending in the axial direction of the main body 51, heat between the inner peripheral surface 2 a of the outer casing member 2 and the outer peripheral surface 51 a of the main body 51 is reduced. Therefore, it is possible to suppress local increase in temperature in the circumferential direction of the main body 51 due to convection of heat.

  Further, since the flow path R is completed in the internal flow path member 50, a seal member for preventing water leakage between the outer shell member 2 and the internal flow path member 50 is not required. For this reason, the air between the outer shell member 2 and the internal flow path member 50 flows out of the faucet, and the air can be replaced. As a result, a high temperature can be suppressed.

  In the above-described embodiment, the protrusion 515 (515a, 515b) is formed in a linear shape, but is not limited thereto. For example, the protrusion 515 may be formed in a dot shape on the outer peripheral surface 51a of the main body 51. According to such a configuration, a space is formed between the inner peripheral surface 2a of the outer shell member 2 and the outer peripheral surface 51a of the main body 51, and the formed space serves as an air layer (heat insulating layer), thereby improving heat insulating properties. Can be done. In addition, rattling can be reduced, and further, since the contact resistance with the inner peripheral surface 2a of the outer casing member 2 is small, the internal flow path member 50 can be easily inserted, and assemblability is improved. be able to.

  In the above-described embodiment, the convex portion 515 has the convex portion 515a extending in the circumferential direction of the main body 51 and the convex portion 515b extending in the axial direction of the main body 51, but is not limited thereto. For example, a convex portion extending obliquely on the outer peripheral surface 51a of the main body 51 may be provided. According to such a configuration, rattling can be reduced. Further, the contact resistance between the outer member 2 and the inner peripheral surface 2a is reduced, and the assembling property can be improved.

  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 511a and the second opening 511b communicating with the switching valve 72 provided in the water discharge channel Rc are arranged side by side on substantially the same axis in a front view. The opening 511a and the second opening 511b may be arranged so as 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 511a and the second opening 511b.

  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 2a Inner peripheral surface 50 Inner channel member 51a Outer peripheral surface 515 Convex R channel

Claims (3)

A metal cylindrical outer shell member forming an outer shell,
A resin internal flow path member having a flow path inside, and having a convex portion on the outer peripheral surface that is inserted into the outer member and is in contact with the inner peripheral surface of the outer member in a state of being inserted into the outer member; A hot and cold water mixing faucet comprising:   The hot and cold water mixing faucet according to claim 1, wherein the convex portion is formed in a linear shape on the outer peripheral surface.   The convex portion extends in a circumferential direction of the internal flow path member on the outer peripheral surface, and a non-contact portion of the outer peripheral member with respect to the inner peripheral surface in a state where the internal flow path member is inserted into the outer peripheral member. The hot and cold water mixing faucet according to claim 2, comprising:

Images