JP2005133848A - Water/hot water mixing faucet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water/hot water mixing faucet capable of accurately adjusting a temperature in setting a high-temperature water tapping area and easily assembling components in a valve body in a short period of time. <P>SOLUTION: A water-side valve seat and a hot water-side valve seat, a valve element 26, a temperature-sensitive spring 30, a pair of bias springs 31, 32 and a tapped-water temperature setting member 34 are mounted in valve bodies 16, 17. The pair of bias springs 31, 32 are respectively composed of coil springs coaxially arranged in the valve bodies 16, 17 and having different outer diameters and lengths. When the valve element 26 is located on a low-temperature water tapping area, the energizing force of both bias springs 31, 32 does not act on the valve element 26, when the valve element 26 is positioned on an intermediate temperature water tapping area, the energizing force of one of the bias springs 31 is acted on the valve element 26, and when the valve element 26 is positioned on a high-temperature water tapping area, the energizing force of both bias springs 31, 32 actes on the valve element 26. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a hot and cold water mixing tap in which the water discharge temperature can be adjusted, and more particularly to a thermostat type hot and cold water mixing tap in which a valve body is urged from both sides by a temperature sensitive spring and a bias spring made of a shape memory material. Is.

  Conventionally, as this kind of hot and cold water mixing tap, a water side valve seat and a hot water side valve seat are provided in the valve body. A valve body is disposed in the valve body so as to be movable in the axial direction so as to be able to contact and separate from these valve seats. Further, in the valve body, there are a temperature-sensitive spring that urges the valve body in a direction to approach the hot water side valve seat, a pair of bias springs that urge the valve body in a direction to approach the water side valve seat, and And a water discharge temperature setting handle for moving the bias spring forward and backward in the axial direction of the valve body.

  By the way, in this kind of hot and cold water mixing tap, in a state where the valve body is located in the high temperature water discharge region, the temperature sensitive spring is greatly compressed, and the urging force of the temperature sensitive spring against the valve body is increased. Therefore, in the conventional configuration, the valve body is moved away from the water side valve seat as the urging force of the temperature sensing spring increases, so that cold water flows in and the temperature can be accurately adjusted in the high temperature water discharge area. There was a problem that I could not.

  Further, in the conventional configuration, a pair of bias springs are arranged in the valve body in an accumulated state. For this reason, when assembling these hot and cold water mixing plugs, it is necessary to incorporate various parts including a valve body, a temperature sensitive spring, a pair of bias springs, etc. in the valve body in the accumulated state of the temperature sensitive spring and each bias spring. There was also a problem that the assembly work was troublesome and time consuming.

  The present invention has been made paying attention to such problems existing in the prior art. The purpose is to prevent the inflow of water at the time of setting the high temperature water discharge area, to accurately adjust the temperature, and to assemble the parts to the valve body with the temperature sensitive spring and the pair of It is an object of the present invention to provide a hot and cold water mixing plug that can be easily and quickly performed in a non-accumulated state of a bias spring.

  In order to achieve the above object, the invention according to claim 1 is adapted to correspond to the water side valve seat and the hot water side valve seat disposed in the valve body, and to be able to contact and separate from these valve seats. A valve body disposed coaxially in the valve body so as to be movable in the axial direction, a temperature-sensitive spring made of a shape memory material that biases the valve body in a direction approaching the hot water valve seat, and a valve body In a hot and cold water mixing plug comprising a pair of bias springs for biasing the water side valve seat in a direction approaching the water side valve seat, and a water discharge temperature setting member for setting the water discharge temperature by moving the valve body via the bias springs The pair of bias springs are composed of coil springs having different outer diameters and lengths arranged in parallel on the same axis in a non-accumulated state in the valve body, and the biasing forces of both bias springs act on the valve body. When not When the valve body is located in the low temperature water discharge area and the biasing force of one bias spring is acting on the valve body, the valve body is located in the medium temperature water discharge area, and the biasing force of both bias springs is acting on the valve body In some cases, the valve body is positioned in a high temperature water discharge area.

According to a second aspect of the present invention, in the first aspect of the present invention, a positioning means for positioning the at least one bias spring is provided.
(Function)
In the first aspect of the invention, when the high temperature water discharge area is set, a large biasing force of the pair of bias springs arranged in parallel acts on the valve body in the opposite direction to the biasing force of the temperature sensitive spring. Therefore, even if the temperature-sensitive spring is greatly compressed and the urging force of the temperature-sensitive spring against the valve body is increased in the setting state of the high-temperature water discharge area, the valve body is moved away from the water-side valve seat. There is nothing. Accordingly, it is possible to reliably prevent unnecessary cold water from flowing in along with the movement of the valve body, and to accurately adjust the temperature.

  Also, when assembling the hot and cold water mixing tap, it becomes possible to set so that the spring force of the bias spring does not act, and various parts including a valve body, a temperature sensitive spring, a pair of bias springs, etc. in the valve body, The temperature-sensitive spring and each bias spring can be incorporated in the non-accumulated state in order. Therefore, the assembly work can be performed easily and in a short time.

  In the second aspect of the present invention, even if the bias spring is in a non-accumulated state and the position is not fixed, the bias spring is parallelly arranged on the same axis without causing a positional shift with respect to a predetermined position in the valve body. Can be positioned.

  As described above, according to the present invention, it is possible to prevent unnecessary cold water from flowing in at the time of setting a high temperature water discharge area, and it is possible to accurately perform temperature adjustment in the high temperature water discharge area. In addition, the assembly of the parts including the valve body into the valve body can be easily and quickly performed in the non-accumulated state of the temperature-sensitive spring and the pair of bias springs.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the hot and cold water mixing tap 11 of this embodiment is installed on the wall surface of a bathroom or the like and supplies water, hot water, and mixed water of water and hot water to the faucet tip 51 or the shower head 52. , Let it out.

  As shown in FIG. 2, a temperature adjusting unit 14 for adjusting the temperature of the mixed water discharged from the faucet tip 51 or the shower head 52 is provided inside the outer casing 12 of the hot water mixing tap 11. A supply unit 53 is provided for switching the water discharge of the faucet tip 51 or the shower head 52, discharging and stopping water, hot water and mixed water of water and hot water, and adjusting the discharge amount. Then, water and hot water are introduced into the outer casing 12, and from there, the water or hot water is directly or directly mixed with the temperature adjustment unit 14 to the supply unit 53 via the temperature adjustment unit 14. , Discharged from the faucet tip 51 or the shower head 52. However, since the supply unit 53 is irrelevant to the present invention, the temperature adjustment unit 14 will be described below without referring to the supply unit 53 any more.

  A cap-shaped adjustment handle 15 is attached to the end of the temperature adjustment unit 14 outside the outer casing 12, and the mixing handle discharged from the faucet tip 51 or the shower head 52 by rotating the adjustment handle 15. The water temperature can be adjusted.

  As shown in FIG. 4, the temperature adjustment unit 14 includes a cylindrical first valve body 16 and a second valve body 17 that are divided into two at an intermediate portion. The first valve body 16 and the second valve body 17 are integrally connected by screwing an outer peripheral screw portion 16a and an inner peripheral screw portion 17a formed at their opposing ends.

  As shown in FIG. 4, the plurality of water side ports 18 and hot water side ports 19 are formed on the outer periphery of the first valve body 16 at intervals in the axial direction. The water side port 18 is connected to a water supply source (not shown) via a water introduction passage 20 inside the outer casing 12. The hot water side port 19 is also connected to a hot water heater (not shown) via the hot water introduction passage 54 in the outer casing 12. The water discharge port 21 is formed at the end of the first valve body 16 and is connected to the water discharge passage 22 in the outer casing 12.

  The water side valve seat 23 is formed in the first valve body 16 so as to be close to the water side port 18. The cylindrical member 24 is disposed and fixed on the same axis inside the connecting portion between the first valve body 16 and the second valve body 17. The hot water side valve seat 25 is formed on the end surface of the tubular member 24 so as to be close to the hot water side port 19.

  The piston-like valve body 26 is disposed in the first valve body 16 so as to be movable in the axial direction on the same axis so as to correspond to the valve seats 23 and 25. The plurality of water supply holes 27 are formed on the outer periphery of the valve body 26 so as to supply water from the water-side port 18 into the hot water mixing chamber 28 in the first valve body 16. The hot water supply hole 29 is formed at the center of the valve body 26 so as to supply hot water from the hot water side port 19 into the hot water mixing chamber 28.

  A coil spring-like temperature sensitive spring 30 made of a shape memory material such as a shape memory alloy is provided in the first valve body 16 in the hot water mixing chamber 28 so as to urge the valve body 26 toward the hot water valve seat 25. It is interposed between the end portion and the valve body 26. The first bias spring 31 and the second bias spring 32 are provided on the end face of the valve body 26 opposite to the temperature-sensitive spring 30 in the tubular member 24 so as to bias the valve body 26 toward the water side valve seat 23. , And are arranged via a spring receiving plate 33.

  The first bias spring 31 and the second bias spring 32 are composed of coil springs having different diameters and lengths. That is, the inner diameter and length of the first bias spring 31 are formed to be larger than the outer diameter and length of the second bias spring 32, respectively. The bias springs 31 and 32 are arranged so as to overlap with each other so that the axes of the bias springs 31 and 32 are positioned on the axes of the valve bodies 16 and 17. Here, it is assumed that the arrangement structure of the bias springs 31 and 32 arranged so as to overlap inside and outside is arranged in parallel.

  The water discharge temperature setting member 34 is disposed in the second valve body 17 so as to adjust and set the water discharge temperature by expanding and contracting both the bias springs 31 and 32 in the axial direction of the valve bodies 16 and 17. The water discharge temperature setting member 34 includes an operation spindle 35 that can be rotated, and a cylindrical feed member 36 that is moved in a direction in which the operation spindle 35 contacts and separates from the valve body 26 as the operation spindle 35 rotates. The operation spindle 35 is rotatably supported on the end of the second valve body 17 on the same axis, and the adjusting handle 15 is attached to the protruding end. The feed member 36 is supported in the second valve body 17 so as to be movable along the axial direction thereof, and the outer peripheral screw portion 35a of the inner end of the operation spindle 35 is screwed to the inner peripheral screw portion 36a of the feed member 36. Yes.

  The spring pushing member 37 is fitted to the edge of the feed member 36 on the valve body 26 side so as to correspond to the edges of the bias springs 31 and 32 so as to be able to contact and separate. The cylindrical positioning portion 38 is formed to protrude from the end portion of the feed member 36 so as to position the end portion on the opposite side of the valve body 26 of the first bias spring 31 on the large diameter side from the outer peripheral side at a predetermined position. One bias spring 31 is accommodated. When the feed member 36 is moved in the direction of approaching the valve body 26, the substantially conical holding section 39 enters into the end opposite to the valve body 26 of the second bias spring 32 on the small diameter side, and its end The feeding member 36 is formed so as to protrude at the center of the end surface so as to hold the portion.

  The positioning surface 40 is formed on the inner peripheral surface of the cylindrical member 24 so that the end of the first bias spring 31 on the valve body 26 side is positioned at a predetermined position from the outer peripheral side. The cylindrical positioning portion 41 is formed to project from the center of the end surface of the valve body 26 so as to position the end of the second bias spring on the valve body 26 side at a predetermined position from the inner peripheral side. The positioning portion 38, the holding portion 39, the positioning surface 40, and the positioning portion 41 constitute a positioning means, and by this positioning means, the bias springs 31 and 32 are in a predetermined position in the first valve body 16, that is, a first position. On the axis of the valve body 16, it is positioned and arranged in parallel on the same axis without causing any positional deviation. As will be apparent from the description below, when the temperature adjustment unit 14 is in the low temperature setting state, the spring-side end surface 37 a of the spring pushing member 37 is separated from the end of the first bias spring 31.

Next, a method for assembling the temperature control unit 14 in the hot and cold water mixing tap 11 configured as described above will be described.
When the temperature adjustment unit 14 is assembled, as shown in FIG. 3, the temperature-sensitive spring 30 and the valve are provided inside the first valve body 16 from its opening end side (left opening end side in FIG. 4). The body 26, the spring receiving plate 33, the second bias spring 32, the first bias spring 31, and the cylindrical member 24 are assembled in this order. At this time, the end of the first bias spring 31 on the valve body 26 side is positioned from the outer peripheral side by the engagement with the inner peripheral positioning surface 40 of the cylindrical member 24. At the same time, the end of the second bias spring 32 on the valve body 26 side is positioned from the inner peripheral side by engagement with the positioning portion 41 on the end surface of the valve body 26. Therefore, the assembly parts including the temperature sensitive spring 30, the valve body 26, both the bias springs 31, 32 and the like are arranged and held in the first valve body 16 at predetermined positions coaxial with the axis thereof.

  Subsequently, the operation spindle 35, the feed member 36, and the spring pushing member 37 of the water discharge temperature setting member 34 are assembled in that order from the opening end side (the opening end side on the right side in FIG. 4) inside the second valve body 17. The C ring 55 is attached to the outer periphery of the operation spindle 35. Thereafter, the inner peripheral threaded portion 17 a of the second valve body 17 is screwed into the outer peripheral threaded portion 16 a of the first valve body 16, and the both valve bodies 16 and 17 are coupled. Then, the end of the first bias spring 31 opposite to the valve body 26 enters and engages in the positioning portion 38 at the end edge of the spring pushing member 37 and is positioned from the outer peripheral side. At the same time, the end of the second bias spring 32 opposite to the valve element 26 is disposed so as to face the holding portion 39 on the end face of the spring pushing member 37.

  In this case, as shown in FIG. 5, the ends of the bias springs 31 and 32 opposite to the valve element 26 are not in contact with the end surface 37a of the spring pushing member 37, but are spaced apart from the end surfaces. The For this reason, those bias springs 31 and 32 are maintained in a non-accumulated state without being compressed. Accordingly, it is not necessary to incorporate various parts such as the valve body 26 while compressing the temperature sensitive spring 30 and the bias springs 31 and 32 in the valve bodies 16 and 17, and the assembly work can be performed easily and efficiently. .

Next, the operation of the hot and cold water mixing tap 11 configured as described above will be described.
4 and 5 show a state in which the operation spindle 35 is rotated and adjusted to a low temperature water discharge area lower than, for example, 30 ° C. by the adjustment handle 15. In this state, the valve element 26 is separated from the water side valve seat 23 by the urging force of the temperature sensitive spring 30 and is disposed at a position where it is joined to the hot water side valve seat 25. At this time, both the bias springs 31 and 32 are in a non-accumulation state, and the biasing force of the bias springs 31 and 32 against the valve body 26 does not act. Therefore, as shown in FIG. 10, in this low temperature water discharge area, even if the operation spindle 35 is rotated, the water discharge temperature does not change, and only water flowing from the water side port 18 is discharged without being mixed with hot water. It is discharged from the water port 21. Accordingly, cold water is discharged from the faucet tip 51 or the shower head 52.

  Further, as shown in FIGS. 6 and 7, when the operation spindle 35 is rotated and adjusted, for example, to an intermediate temperature water discharge region of 30 to 50 ° C., the feed member 36 is moved to the valve body through screw action by screwing of the screw portions 35a and 36a. It is moved forward to the 26th side. Thereby, the end surface 37a of the spring pushing member 37 is brought into contact with the end portion of the first bias spring 31, and the first bias spring 31 is compressed. At this time, the second bias spring 32 is still maintained in a non-accumulated state. For this reason, a relatively weak urging force of only the first bias spring 31 acts on the valve body 26 in a direction opposite to the urging force of the temperature-sensitive spring 30. Therefore, as shown in FIG. 10, in this intermediate temperature discharge region, the shift amount of the valve body 26 with respect to the rotational operation angle of the operation spindle 35, in other words, the gradient of the adjustment amount of the water discharge temperature becomes small, and the water discharge temperature is finely adjusted. Can be set.

  At the time of setting the intermediate temperature discharge region, the valve body 26 is moved in the direction approaching the water side valve seat 23 by the urging force of the first bias spring 31 according to the rotation adjustment amount of the operation spindle 35, and the water side valve It is arranged at an intermediate position between the seat 23 and the hot water side valve seat 25. In this state, a predetermined amount of water flowing in from the water side port 18 and a predetermined amount of hot water flowing in from the hot water side port 19 are mixed in the hot water mixing chamber 28, and the mixed water having the set intermediate temperature is discharged. It is discharged from the water port 21 and discharged from the faucet tip 51 or the shower head 52.

  Further, when the discharge temperature of the mixed water deviates from the set temperature in the setting state of the intermediate temperature discharge region, the temperature-sensitive spring 30 is expanded and contracted according to the discharge water temperature, and the position of the valve body 26 is changed. The water discharge temperature is automatically adjusted so as to become the set temperature. That is, when the water discharge temperature becomes higher than the set temperature, the temperature-sensitive spring 30 is extended and deformed, the valve body 26 is moved in the direction approaching the hot water side valve seat 25, and the inflow amount of water is increased. In addition, the inflow of hot water is reduced. On the other hand, when the water discharge temperature is lower than the set temperature, the temperature-sensitive spring 30 is contracted and deformed, and the valve body 26 is moved away from the hot water side valve seat 25, so that the amount of water inflow is increased. Is reduced and the inflow of hot water is increased.

  Subsequently, as shown in FIGS. 8 and 9, when the operation spindle 35 is rotated and adjusted to a high temperature water discharge region higher than 50 ° C., for example, the feed member 36 is further moved forward to the valve body 26 side. Thereby, both end surfaces 37a of the spring pushing member 37 are brought into contact with the end portions of the bias springs 31 and 32, and the bias springs 31 and 32 are simultaneously compressed. For this reason, the strong biasing force synthesized by the bias springs 31 and 32 acts on the valve body 26 in the opposite direction to the biasing force of the temperature-sensitive spring 30. Therefore, as shown in FIG. 10, in this high temperature discharge region, the gradient of the adjustment amount of the water discharge temperature with respect to the rotational operation angle of the operation spindle 35 becomes larger than that in the middle temperature discharge region.

  At the time of setting the high temperature discharge area, the valve body 26 is moved in the direction approaching the water side valve seat 23 by the biasing force of the bias springs 31 and 32 according to the rotation adjustment amount of the operation spindle 35. The hot water side valve seat 25 is disposed at a position separated from the hot water side valve seat 25. In this state, a small amount of water flowing in from the water side port 18 and a large amount of hot water flowing in from the hot water side port 19 are mixed in the hot water mixing chamber 28, and the set high temperature mixed water is discharged from the spout. 21 is discharged from the faucet tip 51 or the shower head 52.

  Further, when the operation spindle 35 is set to rotate at the maximum temperature in the high temperature water discharge region, the valve body 26 is disposed at a position where it is joined to the water side valve seat 23 and only hot water flowing from the hot water side port 19 is water. And discharged from the spout 21 without being mixed. In this state, the temperature sensitive spring 30 is greatly compressed, and the urging force of the temperature sensitive spring 30 against the valve body 26 is increased. However, a large biasing force synthesized by the first bias spring 31 and the second bias spring 32 acts on the valve body 26 from the opposite direction to the biasing force of the temperature-sensitive spring 30. For this reason, as the urging force of the temperature-sensitive spring 30 increases, the valve body 26 is not moved away from the water-side valve seat 23, and cold water flows from the water-side port 18 into the hot / cold water mixing chamber 28. There is no risk of inflow.

Therefore, according to this embodiment, the following effects can be obtained.
(1) In this hot and cold water mixing tap 11, a pair of bias springs 31 and 32 made of coil springs having different outer diameters and lengths are coaxially arranged in parallel in the valve bodies 16 and 17 in a non-accumulated state. It is installed. When the high temperature water discharge area is set, the large biasing force synthesized by the bias springs 31 and 32 is configured to act on the valve body 26 in the direction opposite to the biasing force of the temperature sensitive spring 30. For this reason, even if the temperature sensing spring 30 is greatly compressed and the urging force of the temperature sensing spring 30 against the valve body 26 is increased in the setting state of the high temperature water discharge area, the valve body 26 is separated from the water side valve seat 23. It is not moved in the direction. Therefore, it is possible to reliably prevent the risk of water flowing in along with the movement of the valve body 26, and the temperature can be adjusted accurately.

  Further, at the time of setting the low temperature water discharge region, both bias springs 31 and 32 are in a non-power storage state, and the biasing force of both bias springs 31 and 32 against the valve body 26 is not configured. For this reason, when the hot and cold water mixing tap 11 is assembled, various parts including the valve body 26, the temperature sensitive spring 30, the pair of bias springs 31, 32, etc. in the valve bodies 16, 17 are replaced with the temperature sensitive spring 30 and each bias spring 31. , 32 in the non-accumulated state. Therefore, the assembly work can be performed easily and in a short time.

  (2) In the hot and cold water mixing tap 11, a positioning portion 41 for positioning the end on the valve body 26 side of the second bias spring 32 on the small diameter side at a predetermined position on the end surface of the valve body 26. Is provided. Further, the spring pushing member 37 on the end face of the feed member 36 in the water discharge temperature setting member 34 is used for positioning the end opposite to the valve body 26 of the first bias spring 31 on the large diameter side at a predetermined position from the outer peripheral side. A positioning part 38 is provided.

  For this reason, the pair of bias springs 31 and 32 are positioned in parallel on the same axis without causing a positional shift with respect to a predetermined position in the valve bodies 16 and 17 in spite of the non-accumulation state. Can do. Therefore, when the bias springs 31 and 32 are moved forward and backward in the axial direction by the water discharge temperature setting member 34, the bias springs 31 and 32 are prevented from being deformed or displaced in a direction perpendicular to the axial line. Temperature adjustment can be performed accurately.

  (3) In the hot and cold water mixing tap 11, when the feed member 36 is moved in the direction approaching the valve body 26 to the spring pushing member 37 on the end surface of the feed member 36, the second bias spring 32 on the small diameter side. A holding portion 39 is provided which enters into the end portion opposite to the valve body 26 and holds the end portion. For this reason, it is possible to prevent the displacement of the second bias spring 32 during the setting of the medium temperature water discharge area and the high temperature water discharge area, and it is possible to accurately adjust the temperature at the discharge of the water discharge area. .

(Example of change)
In addition, this embodiment can also be changed and embodied as follows.
In the embodiment, the positioning configuration of both ends of the first bias spring 31 and the second bias spring 32 is arbitrarily changed. For example, a rib for positioning the inner diameter side of the first bias spring 31 is formed on the valve body 26 or the spring pushing member 37.

The temperature sensitive spring is made of a material other than shape memory metal, for example, shape memory synthetic resin.
(Other technical ideas)
The technical ideas other than the claims ascertained from the embodiment are as follows.

(1) A water side valve seat and a hot water side valve seat disposed in the valve body, and a valve body coaxially arranged in the valve body so as to be movable toward and away from the valve seat. A provided valve body, a temperature sensitive spring made of a shape memory material that urges the valve body in a direction approaching one of the water side valve seat and the hot water side valve seat, and the valve body as a water side valve seat and Hot water comprising a plurality of bias springs biased in a direction approaching the other of the hot water side valve seats, and a water discharge temperature setting member for setting the water discharge temperature by moving the valve body via the bias springs In the mixing tap,
Each of the bias springs is composed of coil springs having different outer diameters and lengths that are coaxially arranged in parallel within the valve body, and when the biasing force of the bias spring does not act on the valve body, When the biasing force of at least one bias spring is acting on the valve body in the low temperature water discharge area, the valve body is positioned in the medium temperature water discharge area, and more biasing force of the bias spring than the state of the medium temperature water discharge area A hot and cold water mixing valve, wherein the valve body is positioned in a high temperature water discharge area when acting on the body.

  Therefore, even if the temperature sensing spring is greatly compressed and the urging force of the temperature sensing spring against the valve body is increased in the setting state of the high temperature water discharge area, the valve body is moved in a direction away from the water side valve seat. There is no. Accordingly, it is possible to reliably prevent unnecessary cold water from flowing in along with the movement of the valve body, and to accurately adjust the temperature.

(2) The hot and cold water mixing plug according to any one of claims 1, 2, and (1), wherein the biasing forces of the two bias springs are different.
(3) The discharge water temperature setting member is a valve that is moved in a direction in which the operation spindle is coaxially and rotatably supported in the valve body, and the valve body is moved toward and away from the rotation of the operation spindle. 3. A feed member arranged coaxially within the body so as to be movable in the axial direction, wherein: (1) or (2) The hot and cold water mixing tap according to any one of the above.

  (4) As the positioning means, the valve body is provided with a positioning portion for positioning the end of the bias spring on the small-diameter side bias spring at a predetermined position, and the feed member is opposite to the valve body of the bias spring on the large-diameter side. The positioning part for positioning a side end part to a predetermined position is provided, The said (1) term, (2) term, or (3) term | claim as described in any one of Claim 3 characterized by the above-mentioned. Hot water mixer tap.

  (5) When the feed member is moved in a direction approaching the valve body, the feed member enters into the end opposite to the valve body of the bias spring on the small diameter side and holds the end. The hot and cold water mixing plug according to any one of claims 2 and 3, the item (2), the item (3), and the item (4).

The perspective view which shows the inside of the bathroom using the hot-water mixing tap of one Embodiment. Sectional drawing which shows the hot-water and water mixing stopper of one Embodiment. The disassembled perspective view which shows a temperature control unit. Sectional drawing which shows the temperature control unit of FIG. 3 in the setting state of a low temperature water discharge area. The enlarged view in a circle in FIG. Sectional drawing which shows the setting state of the middle temperature water discharge area of a temperature control unit. The enlarged view in the circle in FIG. Sectional drawing which shows the setting state of the high temperature water discharge area of a temperature control unit. The enlarged view in a circle in FIG. The operation characteristic figure of the temperature control unit of one embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Hot water mixing tap, 14 ... Temperature control unit, 15 ... Adjustment handle, 16 ... 1st valve body, 17 ... 2nd valve body, 23 ... Water side valve seat, 25 ... Hot water side valve seat, 26 ... Valve body, DESCRIPTION OF SYMBOLS 30 ... Temperature-sensitive spring, 31 ... 1st bias spring, 32 ... 2nd bias spring, 34 ... Water discharge temperature setting member, 35 ... Operation spindle, 36 ... Feed member, 37 ... Spring pushing member, 38 ... Positioning as positioning means 39, a holding part as positioning means, 40 ... a positioning surface as positioning means, 41 ... a positioning part as positioning means.

Claims (2)

A water side valve seat and a hot water side valve seat arranged in the valve body, and arranged coaxially in the valve body so as to be movable toward and away from these valve seats. A temperature sensing spring made of a shape memory material that biases the valve body in a direction approaching the hot water side valve seat; and a pair of bias springs that bias the valve body in a direction approaching the water side valve seat; In a hot and cold water mixing tap provided with a water discharge temperature setting member that moves the valve body through those bias springs to set the water discharge temperature,
The pair of bias springs are coil springs having different outer diameters and lengths arranged coaxially in parallel within the valve body, and when the biasing force of both bias springs is not acting on the valve body, When the body is located in the low temperature water discharge area and the biasing force of one bias spring is acting on the valve body, the valve body is located in the medium temperature water discharge area, and when the biasing force of both bias springs is acting on the valve body A hot and cold water mixing tap, wherein the valve body is positioned in a high temperature water discharge area. 2. The hot and cold water mixing plug according to claim 1, further comprising positioning means for positioning the at least one bias spring.

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