JP2023146082A - Hot-and-cold-water mixing valve - Google Patents

Abstract

To provide a hot-and-cold-water mixing valve that can simply facilitate maintaining of stably operability with lapse of time.SOLUTION: A hot-and-cold-water mixing valve 10 has a generally cylindrical housing 11, a moving valve body 12 disposed in the housing 11, a temperature sensitive spring 13, a bias spring 14, a slider 15, a spindle 16, and a ratchet mechanism portion 20 disposed outside the housing 11. The ratchet mechanism portion 20 has a first ring member 21 that is attached to the spindle 16 and has an outer diameter generally the same as the housing 11, and has a first gear 21b at a diametrical outside annular portion on a surface opposing to a left wall 11a of the housing 11, and a second ring member 22 that cannot rotate with respect to the left wall 11g, can slide in a direction of a cylinder shaft CA, is attached to the first ring member 21 in an energized state, and has an outer diameter being generally the same as the housing 11, and is formed with a second gear 22b capable of being fitted with the first gear 21b on a surface opposing to the first ring member 21.SELECTED DRAWING: Figure 5

Description

The present invention relates to a hot water mixing valve in a hot water mixing faucet.

A hot water mixing valve that mixes and discharges hot water and water is disposed inside the hot water mixing faucet. This hot water mixing valve has a structure in which a movable valve body, which is movable in the axial direction in a cylindrical housing, is biased from both sides in the axial direction by a bias spring and a temperature-sensitive spring made of a shape memory alloy. There is. In this hot water mixing valve, when the movable valve body opens the port on the hot water side, the temperature-sensitive spring is compressed to the maximum, so the force that tries to close the port on the hot water side becomes strong, and the temperature control handle stops rotating. There is a possibility that this will happen. For this reason, some hot water mixing valves are equipped with a ratchet mechanism to prevent the temperature adjustment handle from rotating due to its resistance.

In the hot water mixing valve 100 disclosed in Patent Document 1, as shown in FIGS. 7 and 8, a ratchet gear 102 having a wavy protrusion 102a formed on the outer surface is coaxially attached to one end side of the housing 101. At the same time, a ratchet ring 103 having claws 103a formed at two locations on the inner circumferential surface of the circumferential portion is fixed to the temperature adjustment stopper rod 104. The ratchet ring 103 is configured to rotate relative to the housing 101 in conjunction with the temperature adjustment plug rod 104. As a result, rotation of the temperature adjustment handle (not shown) attached to the temperature adjustment stopper rod 104 can be suppressed by the rotational resistance generated by the meshing of the inner ratchet gear 102 and the outer ratchet ring 103. There is.

JP 2019-11791 Publication

In the prior art described above, the ratchet ring 103 has a complicated shape and is therefore formed by injection molding of resin. If the ratchet ring 103 is made of resin, the force that suppresses the rotation of the temperature adjustment plug rod 104 by engaging the claw portion 103a with the protrusion 102a of the ratchet gear 102 weakens over time, making it possible to suppress the rotation of the temperature adjustment handle. It may disappear. In order to keep the initial pressing force high in response to this, it was necessary to increase the rigidity of the ratchet ring 103 by making it a resin with a high modulus of elasticity, increasing its wall thickness, etc. As a result, in the initial stage, it may require strong force to rotate the temperature adjustment handle to adjust the temperature of the discharged water, which may reduce the operability of the hot water mixing faucet. There was a problem in that it took time to adjust the material and shape.

In view of these problems, an object of the present invention is to provide a hot water mixing valve that is simple and easy to maintain stable operability over time.

A first aspect of the present invention is a hot water mixing valve that mixes hot water internally, and includes a substantially cylindrical housing having a hot water side port to which hot water is supplied and a water side port to which water is supplied; a movable valve body that is provided so as to be slidable in the direction of the cylinder axis and that changes the opening degree of the hot water side port and the water side port reciprocally by sliding; a temperature-sensitive spring that biases the hot water side port in the direction of closing the hot water side port from one direction of the cylinder axis, and a direction that opens the hot water side port of the movable valve body from the other side of the cylinder axis direction with respect to the housing. a bias spring that is biased toward the cylinder; and a slider that is provided in the housing so as to be slidable in the direction of the cylinder axis and that supports an end of the bias spring that is opposite to the side that is applied to the movable valve body. and a spindle that is rotatably connected to the other end of the housing in the direction of the cylinder axis and that sends the slider in the direction of the cylinder axis by operating a temperature control handle. The spindle has a plurality of protrusions having a chevron-shaped cross section extending in the radial direction on a radially outer annular portion of the surface facing the other end of the housing in the direction of the cylindrical axis. A first ring member having a first gear having stripes formed at equal angular intervals is attached with the cylindrical shaft as the central axis, and the other end of the housing in the direction of the cylindrical axis has an outer diameter. A second gear, which is substantially the same as the housing, is slidable in the direction of the cylindrical axis opposite to the first ring member, and is capable of fitting into the first gear on a surface facing the first ring member. The second ring member is attached to the housing in a non-rotatable manner with the cylindrical shaft as a central axis and is biased toward the first ring member.

According to the first invention, the second gear of the second ring member fits into the first gear of the first ring member, thereby preventing rotation of the spindle. Then, a rotational force is applied to the spindle, and the second ring member resists the force and moves away from the first ring member in the direction of the cylinder axis, thereby allowing rotation. The first gear and the second gear are provided with outer diameters that are approximately the same as the housing, and are fitted over the entire circumference in the circumferential direction, so even if the biasing force is set to a small value, the force that suppresses the rotation of the spindle is large. be able to. Thereby, it is possible to provide a hot water mixing valve that easily maintains stable operability over time.

A second aspect of the present invention is that in the first aspect, the biasing of the second ring member toward the first ring member is performed between the second ring member and the housing along the central axis of the spindle. It is characterized by a metal compression coil spring placed coaxially with the spring.

According to the second invention, the biasing of the second ring member toward the first ring member is performed by a metal compression coil spring disposed coaxially with the central axis of the spindle. In addition to the effects, the operability of the hot water mixing valve can be made more stable over time.

A third invention of the present invention is characterized in that in the first invention or the second invention, an O-ring is disposed between the inner peripheral surface of the second ring member and the outer peripheral surface of the spindle. do.

According to the third invention, resistance is provided to the sliding of the second ring member relative to the first ring member in the direction of the cylinder axis, and noise is generated when the second ring member vibrates and comes into contact with the first ring member. can be suppressed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a hot water mixing faucet in which a hot water mixing valve according to an embodiment of the present invention is disposed. It is a perspective view of the hot water mixing valve concerning the above-mentioned embodiment. It is a side view of the hot water mixing valve concerning the above-mentioned embodiment. It is an exploded perspective view of the hot water mixing valve concerning the above-mentioned embodiment. 4 is a cross-sectional view taken along the line VV in FIG. 3. FIG. It is a perspective view explaining the 1st ring member and the 2nd ring member of the hot water mixing valve concerning the above-mentioned embodiment. FIG. 2 is a perspective view of a conventional hot water mixing valve. It is a perspective view explaining the ratchet gear and ratchet ring of the conventional hot water mixing valve.

A hot water mixing valve 10 built into a hot water mixing faucet 1 according to an embodiment of the present invention will be described using FIGS. 1 to 6. In each figure, the front, back, left, right, top, and bottom directions are indicated by arrows based on the user who uses the hot water mixing faucet 1, and the explanation regarding the directions will follow these directions.

As shown in FIG. 1, the hot water mixing valve 10 has a function of mixing and discharging supplied hot water and water, and is built into the hot water mixing faucet 1. The hot water mixing faucet 1 includes a faucet body 2 attached to a wall surface W via a hot water supply pipe 3A and a water supply pipe 3B, which are crank-shaped eccentric pipes, and a temperature adjustment handle 2A attached to the left side of the faucet body 2. and a switching handle 2B attached to the right side of the faucet body 2. A shower hose 4 is attached to the front side of the faucet body 2, and a collar 5 is attached to the lower side of the faucet body 2. The temperature control handle 2A has a substantially cylindrical shape and is coaxially attached to the spindle 16 of the hot water mixing valve 10. By rotating the temperature control handle 2A, the hot water mixing valve 10 is operated to change the mixing ratio of hot water. Then, hot water mixed with a temperature corresponding to the rotation angle of the temperature control handle 2A is discharged from the shower hose 4 or the plunger 5. Specifically, by rotating the temperature control handle 2A upward from the illustrated position of about 40 degrees, the temperature becomes high, and by rotating it downward, the temperature becomes low. The switching handle 2B has a substantially cylindrical shape and is rotated upward or downward from a predetermined water stop position shown in the figure, so that a mixed amount of hot water per unit time corresponding to the amount of rotation is supplied to the shower hose 4. Or selectively discharged from the collar 5.

As shown in FIGS. 2 to 5, the hot water mixing valve 10 includes a substantially cylindrical housing 11, a movable valve body 12 disposed inside the housing 11, a temperature-sensitive spring 13, a bias spring 14, and a slider. 15 and a spindle 16. Furthermore, the hot water mixing valve 10 has a ratchet mechanism section 20 disposed outside the left side of the housing 11.

As shown in FIGS. 4 and 5, the housing 11 has an integrated structure in which three long and short cylindrical members having a common cylinder axis CA are connected in the direction of the cylinder axis CA. A hot water side port 11a serving as a hot water supply port and a water side port 11b serving as a water supply port are formed in the cylindrical wall of the housing 11, penetrating each other at different positions in the direction of the cylinder axis CA. has been done. Furthermore, a right wall 11f having a cylindrical through hole 11f1 whose central axis is the cylinder axis CA is formed at the right end of the housing 11. This through hole 11f1 functions as a discharge port 11c from which mixed hot water is discharged. A left wall 11g having a cylindrical through hole 11g1 whose central axis is the cylinder axis CA is formed at the left end of the housing 11. Four arc-shaped protrusions 11g2 protruding leftward are formed at equal angular intervals on the outer peripheral portion of the left side surface of the left wall 11g, and the portion between each protrusion 11g2 is a second ring, which will be described later. Each protruding portion 22c of the member 22 is formed as a fitting portion 11g3 that is slidably fitted in the direction of the cylinder axis CA.

As shown in FIGS. 4 and 5, the movable valve body 12 has a substantially cylindrical shape, is arranged inside the housing 11 with the cylinder axis CA as a common axis, and is directed in the direction of the cylinder axis CA with respect to the housing 11. It is said that it can be slid on. The movable valve body 12 is located at a position where it abuts from the right side on the hot water closing side regulating portion 11d formed at the right end of the central cylindrical member constituting the housing 11, and at a position where the movable valve body 12 abuts from the right side on the hot water closing side regulating portion 11d formed at the right end of the central cylindrical member constituting the housing 11. It is slidable in the direction of the cylinder axis CA between a position where it abuts from the left side a step-shaped molten metal opening side regulating part 11e formed in the inner cylinder part.

As the movable valve body 12 slides to the left, it operates to open the water side port 11b and close the hot water side port 11a. When the left end comes into contact with the hot water closing side regulating portion 11d, the hot water side port 11a is completely closed. Furthermore, as the movable valve body 12 slides to the right, it operates to open the hot water side port 11a and close the water side port 11b. Then, when the right end portion comes into contact with the hot water opening side regulating portion 11e, the water side port 11b is completely closed. That is, by moving the movable valve body 12 in the left-right direction, the mixing ratio of hot water and water is adjusted, and the temperature of the mixed hot water is determined.

As shown in FIG. 5, the temperature-sensitive spring 13 is a compression coil spring made of a shape memory alloy, and has the property of changing its hardness when it comes into contact with mixed hot water discharged from the discharge port 11c. Specifically, the temperature-sensitive spring 13 has a spring constant that increases as the temperature of the mixed hot water that comes into contact with it increases, and a spring constant that decreases as the temperature of the mixed hot water that comes into contact with it decreases. The temperature-sensitive spring 13 has its center axis aligned with the cylindrical axis CA, and its right end portion contacts the right wall 11f of the housing 11 from the left, and its left end portion contacts the movable valve body 12 via a substantially cylindrical spring receiving member 13a. It is arranged in the housing 11 so as to be in contact with the right end portion of the housing 11 .

As shown in FIG. 5, the bias spring 14 is a compression coil spring made of metal, and its center axis is aligned with the cylindrical axis CA. It is disposed in the housing 11 so as to abut the left end of the movable valve body 12 via the flange 17a at the right end. The shaft rod 17 is a substantially cylindrical member that extends rightward from the right end of the slider 15 with its central axis aligned with the cylindrical axis CA. It has been passed.

As shown in FIGS. 4 and 5, the slider 15 is a substantially cylindrical member having a bottom wall portion 15a at the right end. The slider 15 is arranged inside the housing 11 with its central axis aligned with the cylinder axis CA, and is slidable only in the direction of the cylinder axis CA. In the slider 15, a female threaded portion 15b formed in the left cylindrical portion is screwed into a male threaded portion 16b of a spindle 16 rotatably connected to the left end of the housing 11 about the cylindrical axis CA. Thereby, the slider 15 slides in the housing 11 to the right or to the left when the spindle 16 is rotated by operation of the temperature control handle 2A (see FIG. 1). The left end side of the shaft rod 17 is fixed to the bottom wall portion 15a.

As shown in FIGS. 4 and 5, the spindle 16 is a substantially round bar-shaped member, and has a shaft portion 16a on the left side, a male threaded portion 16b with a male thread on the right side, and a portion between the shaft portion 16a and the male threaded portion 16b. It has a large diameter portion 16c. The shaft portion 16a includes a serration portion 16a1 that is serrated from the left tip side, an E-ring groove 16a2 into which an E-ring is fitted, a convex portion 16a3 that stops the rotation of the first ring member 21, and a first O-ring. 24, and a second O-ring groove 16a5, into which the second O-ring 25 is inserted. A pair of convex portions 16a3 are provided so as to extend radially outward. Each convex portion 16a3 can be fitted into each concave portion 21a1 of the first ring member 21, which will be described later. The male threaded portion 16b can be screwed into the female threaded portion 15b of the slider 15. The large diameter portion 16c is formed to have a larger outer diameter than the shaft portion 16a and the male threaded portion 16b. With the first O-ring 24 inserted into the first O-ring groove 16a4 and the second O-ring 25 inserted into the second O-ring groove 16a5, the spindle 16 is inserted into the through hole 11g1 of the left wall 11g of the housing 11 through serrations. It is passed through from part 16a1. Then, with the serration portion 16a1 protruding outward to the left, the large diameter portion 16c abuts the left wall 11g from the right and is prevented from moving to the left. In this state, the spindle 16 is attached to the housing 11 so as to be rotatable about the cylinder axis CA. At this time, the second O-ring 25 contacts the inner circumferential surface of the through hole 11g1 of the housing 11 in a radially compressed state to maintain a watertight state.

As shown in FIGS. 4 to 6, a ratchet mechanism 20 is disposed between the shaft portion 16a of the spindle 16 and the housing 11. As shown in FIGS. The ratchet mechanism section 20 includes a first ring member 21, a second ring member 22, a coil spring 23, a first O-ring 24, and an E-ring 26. Here, the coil spring 23 and the first O-ring 24 correspond to a "compression coil spring" and an "O-ring" in the claims, respectively.

As shown in FIGS. 4 to 6, the first ring member 21 is a disc-shaped member whose outer diameter is approximately equal to the outer diameter of the left end portion of the housing 11, and has a mounting hole 21a extending through the center in the central axis direction. has. A pair of radially opposed recesses 21a1 are formed in the attachment hole 21a. By fitting each concave portion 21a1 into each convex portion 16a3 of spindle 16, first ring member 21 is attached to spindle 16 so as to be non-rotatable around cylinder axis CA. On the right side surface of the first ring member 21, an annular first gear 21b is formed on the outer circumferential annular portion, and a plurality of protrusions 21b1 extending in the radial direction and having a chevron-shaped cross section are arranged at equal angular intervals around the central axis. ing. Four notches 21c are formed at equal angular intervals in the outer diameter portion of the first ring member 21. The four notches 21c are used when the first ring member 21 is assembled to the spindle 16.

The second ring member 22 is a disc-shaped member having an outer diameter equal to that of the first ring member 21, and has a mounting hole 22a in the center that penetrates in the central axis direction. On the left side surface of the second ring member 22, an annular second gear 22b is formed on the outer periphery, in which a plurality of protrusions 22b1 extending in the radial direction and having a chevron-shaped cross section are arranged at equal angular intervals around the central axis. There is. The second gear 22b is formed so that when the second ring member 22 is brought close to the first ring member 21 with their central axes aligned, the second gear 22b meshes with the first gear 21b and cannot rotate relative to it in the circumferential direction. . On the right side surface of the second ring member 22, four arc-shaped protrusions 22c protruding rightward are formed at equal angular intervals on the outer circumference. By fitting each protrusion 22c into each fitting part 11g3 of the housing 11, the second ring member 22 is assembled to the housing 11 so as to be slidable in the direction of the cylinder axis CA and non-rotatable in the circumferential direction.

As shown in FIGS. 4 and 5, the coil spring 23 is a compression coil spring made of metal and is disposed between the second ring member 22 and the left wall 11g of the housing 11, with its central axis aligned with the cylindrical axis CA. be done. As a result, the second ring member 22 is biased to the left with respect to the housing 11. When the shaft portion 16a of the spindle 16 is passed through the mounting hole 22a, the first O-ring 24 contacts the inner peripheral surface of the mounting hole 22a in a compressed state in the radial direction, and the cylindrical shaft of the second ring member 22 Provides resistance to sliding in the CA direction.

The ratchet mechanism section 20 is assembled to the housing 11 as follows. A spindle 16 with a first O-ring 24 and a second O-ring 25 attached, a slider 15, a bias spring 14, a movable valve body 12, and a temperature-sensitive spring 13 are incorporated inside the housing 11. In this state, the second ring member 22 is attached to the housing 11 with the coil spring 23 sandwiched between the second ring member 22 and the housing 11. Specifically, with the shaft portion 16a of the spindle 16 protruding leftward from the housing 11 passed through the inner diameter portion of the coil spring 23, the second ring member 22 is inserted by passing the shaft portion 16a through the mounting hole 22a. Each protrusion 22c is moved to the right so that it fits into each fitting part 11g3 of the housing 11. At this time, the first O-ring 24 is brought into contact with the inner circumferential surface of the attachment hole 22a in a compressed state in the radial direction. Next, the shaft portion 16a of the spindle 16 protruding leftward from the housing 11 is passed through the mounting hole 21a from the first gear 21b side, and the first ring member 21 is moved rightward, so that the pair of recesses 21a1 are inserted into the spindle 16. It is fitted into a pair of convex portions 16a3. In this state, the E-ring 26 is fitted into the E-ring groove 16a2 of the spindle 16 to prevent the first ring member 21 from moving leftward and coming off the spindle 16. At this time, the first ring member 21 cannot rotate about the cylinder axis CA with respect to the spindle 16, and the second gear 22b of the second ring member 22 meshes with the first gear 21b. On the other hand, the second ring member 22 is pressed toward the left by the urging force of the coil spring 23.

The hot water mixing valve 10 operates as follows in response to the operation of the temperature control handle 2A. When the temperature control handle 2A is adjusted to the approximately 40 degree position shown in FIG. It is maintained at In this state, the hot water side port 11a and the water side port 11b are opened by a predetermined amount, and the mixed hot water passes through the area where the temperature sensitive spring 13 is arranged and is discharged from the discharge port 11c. At this time, if the temperature of the mixed hot water is higher than the set temperature, the temperature-sensitive spring 13 increases its spring constant and pushes the movable valve body 12 to the left to narrow the hot water side port 11a. When the temperature of the mixed hot water is lower than the set temperature, the temperature sensitive spring 13 lowers the spring constant, and the bias spring 14 pushes the movable valve body 12 in the right direction to widen the hot water side port 11a. This automatically adjusts the temperature of the mixed hot water. At this time, the second gear 22b of the second ring member 22 is fitted into the first gear 21b of the first ring member 21, which is non-rotatably fixed to the spindle 16, which rotates as the temperature adjustment handle 2A is operated. Being forced.

When the temperature control handle 2A is turned upward from the approximately 40 degree position shown in FIG. 1, the slider 15 is moved to the right via the spindle 16, and the bias spring 14 is pushed to the right. As a result, the biasing force exerted by the bias spring 14 increases and the movable valve body 12 is pushed to the right. As a result, the water side port 11b is narrowed while the hot water side port 11a is widened, and the temperature of the mixed hot water is adjusted to approach the raised set temperature. At this time, when the spindle 16 is rotated with the operation of the temperature adjustment handle 2A, each protrusion 21b1 of the first gear 21b of the first ring member 21 is rotated, and each protrusion 21b1 of the second gear 22b of the second ring member 22 is rotated. 22b1 and the meshing position changes. Since the second ring member 22 is pressed leftward against the first ring member 21 by the coil spring 23, a resistance force is generated in the rotation of the spindle 16, and a click feeling is generated each time the engagement position changes. arise. Furthermore, in such a state where the temperature of the mixed hot water is raised, the biasing force of the temperature-sensitive spring 13 increases, and a force is generated that tries to rotate the temperature adjustment handle, but the ratchet mechanism described above This is suppressed by the rotational resistance force caused by 20.

When the temperature control handle 2A is turned downward from the approximately 40 degree position shown in FIG. 1, the slider 15 is moved to the left via the spindle 16, and the bias spring 14 is retracted to the left. As a result, the biasing force of the bias spring 14 is reduced, and the movable valve body 12 is pushed to the left by the biasing force of the temperature-sensitive spring 13. As a result, the hot water side port 11a is narrowed while the water side port 11b is widened, and the temperature of the mixed hot water is adjusted to approach the lowered set temperature. At this time as well, when the spindle 16 is rotated with the operation of the temperature adjustment handle 2A, each protrusion 21b1 of the first gear 21b of the first ring member 21 is rotated. The meshing position changes over the strip 22b1. Since the second ring member 22 is pressed leftward against the first ring member 21 by the coil spring 23, a resistance force is generated in the rotation of the spindle 16, and a click feeling is generated each time the engagement position changes. arise.

The present embodiment configured as described above has the following effects. The rotation of the spindle 16 is prevented by fitting the second gear 22b of the second ring member 22 into the first gear 21b of the first ring member 21. Then, when a rotational force is applied to the spindle 16 and each of the protrusions 21b1 of the first gear 21b tries to overcome each of the protrusions 22b1 of the second gear 22b, the second ring member 22 moves with respect to the first ring member 21. It resists the biasing force of the coil spring 23 and is allowed to move and rotate apart in the direction of the cylinder axis CA. At this time, since the first gear 21b and the second gear 22b are provided at a position where the outer diameter is approximately the same as that of the housing 11 and are fitted over the entire circumference in the circumferential direction, the biasing force by the coil spring 23 is set to be small. However, the force that suppresses the rotation of the spindle 16 can be increased. Thereby, it is possible to provide the hot water mixing valve 10 that easily maintains stable operability over time. In addition, since the ratchet mechanism section 20 is disposed outside the housing 11, the outer diameters of the first gear 21b and the second gear 22b can be set to be approximately the same size as the outer diameter of the housing 11, so that projections can be avoided. The angular interval between the strips 21b1 and the protrusions 22b1 can be made smaller, and the temperature can be more finely adjusted by operating the temperature adjustment handle 2A.

Further, the second ring member 22 is biased toward the first ring member 21 by a coil spring 23 which is a metal compression coil spring disposed coaxially with the cylindrical axis CA which is the central axis of the spindle 16. Therefore, the rotational force when each protrusion 21b1 of the first gear 21b rides over each protrusion 22b1 of the second gear 22b is difficult to change over time, and stable operability can be achieved.

Furthermore, a first O-ring 24 is disposed in a radially compressed state between the inner circumferential surface of the attachment hole 22a of the second ring member 22 and the outer circumferential surface of the shaft portion 16a of the spindle 16. This provides resistance to the sliding of the second ring member 22 relative to the first ring member 21 in the direction of the cylindrical axis CA, and reduces the noise generated when the second ring member 22 vibrates and comes into contact with the first ring member 21. can suppress the occurrence of

The embodiments disclosed this time should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims rather than the description of the embodiments described above, and it is intended that all changes within the meaning and scope equivalent to the claims are included.

1 hot water mixing faucet, 2A temperature control handle, 10 hot water mixing valve, 11 housing, 11a hot water side port, 11b water side port, 11c discharge port, 11g left wall, 12 movable valve body, 13 temperature sensitive spring, 14 bias spring , 15 slider, 16 spindle, 16a shaft section, 20 ratchet mechanism section, 21 first ring member, 21b first gear, 21b1 protrusion, 22 second ring member, 22a mounting hole, 22b second gear, 22b1 protrusion, 23 Coil spring (compression coil spring), 24 First O-ring (O-ring), CA cylinder shaft

Claims (3)

A hot water mixing valve that mixes hot water internally,
a generally cylindrical housing having a hot water side port to which hot water is supplied and a water side port to which water is supplied;
a movable valve body that is provided in the housing so as to be slidable in the direction of the cylinder axis, and that slides to reciprocally change the opening degrees of the hot water side port and the water side port;
a temperature-sensitive spring that biases the movable valve body toward the housing from one direction of the cylinder axis in a direction to close the hot water side port;
a bias spring that biases the movable valve body toward the housing from the other direction of the cylinder axis in a direction to open the hot water side port;
a slider that is provided in the housing so as to be slidable in the direction of the cylinder axis and supports an end of the bias spring opposite to the side that is applied to the movable valve body;
a spindle rotatably connected to the other end of the housing in the direction of the cylinder axis, the spindle being rotatably connected to the cylinder axis as a central axis, and sending the slider in the direction of the cylinder axis by operating a temperature control handle;
The spindle has a plurality of protrusions having a chevron-shaped cross section extending in the radial direction on a radially outer annular portion of the surface facing the other end of the housing in the direction of the cylinder axis, and having an outer diameter substantially the same as that of the housing. A first ring member having first gears formed at equal angular intervals is attached with the cylindrical shaft as a central axis,
The other end of the housing in the direction of the cylindrical axis has an outer diameter substantially the same as that of the housing, is slidable in the direction of the cylindrical axis opposite to the first ring member, and is attached to the first ring member. A second ring member having a second gear that can be fitted to the first gear formed on an opposing surface thereof is non-rotatable with respect to the housing about the cylindrical shaft as a central axis and is attached toward the first ring member. The hot water mixing valve is installed in the energized state. In claim 1,
The second ring member is biased toward the first ring member by a metal compression coil spring disposed coaxially with the central axis of the spindle between the second ring member and the housing. Hot water mixing valve. In claim 1 or claim 2,
The hot water mixing valve includes an O-ring disposed between the inner circumferential surface of the second ring member and the outer circumferential surface of the spindle.

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