JPH0821543A - Seal structure of disc valve element for water faucet - Google Patents

Abstract

PURPOSE:To accomplish certain sealing at all times by furnishing a seal ring accommodation part at the periphery of a port connection part, forming this accommodation part as reducing the width from the side receiving the water pressure toward the side not receiving water pressure. CONSTITUTION:A single lever type water cock to make control, etc., of the changing-over between water stop and discharge, the rate of flow, and the temp. of a mixed water by turning one handle lever has a head part consisting of a movable disc valve body, stationary disc valve body 32, and rear lid 33. The rear lid 33 is provided with a hot water flow-in port 59 and a mixed water flowout port in positions identical to the stationary disc valve element 32. A cylindrical projection 68 having a tapered peripheral surface 62 is formed at each port on its disc oversurface side. Between the tapered surface 62 and a recess 58 formed at each port, a seal ring accommodation part 69 is formed in such a way that the width reduces from the side receiving the water pressure toward the side not receiving water pressure, and there a seal ring 63 is installed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a faucet such as a single-lever type faucet which operates a handle lever to switch between water shutoff and water discharge, flow rate control, and mixed water temperature control. The present invention relates to a seal structure for a disc valve body.

[0002]

2. Description of the Related Art If a conventional single lever type faucet is shown,
This is as shown in FIGS. As shown in the figure, in this faucet, a hot water supply pipe 2 and a water supply pipe 3 are connected in communication with the bottom surface side of the faucet body 1, and a water discharge pipe 4 is integrally formed on the front surface of the central portion. It is molded. Further, a cylindrical head portion 5 is incorporated in the central upper portion of the faucet body 1. The head portion 5 has a cylindrical head case 6, and a fixed disc valve body 7 and a movable disc valve body 8 are internally fitted and mounted on the lower side thereof. The fixed disc valve body 7 has a hot water inflow port 7a and a water inflow port 7b, and a mixed water discharge port 9, and the movable disc valve body 8 has a mixing chamber 10 for mixing hot water and water. There is.

A rotary shaft 11 is mounted on the upper side of the head case 6. A lever shaft 13 having an upper end connected to a handle lever 12 is inserted through the rotary shaft 11, and a vertically intermediate portion is supported by a pin 14 so as to be vertically rotatable. A ball-shaped operating portion 15 is formed at the lower end of the lever shaft 13, and the operating portion 15 is engaged with and connected to the movable disc valve body 8 via a disc cap 16.

Further, on the outer periphery of the upper end surface of the head case 6,
As best shown in FIG. 17, a stopper cylindrical body 17 for regulating the horizontal rotation angle of the rotary shaft 11
Is arranged. The stopper tubular body 17 is externally fitted and attached to the tubular portion 18 of the rotary shaft 11, and the pin 1 described above is attached.
4, the lever shaft 13 and the rotary shaft 11 are integrally connected and coupled. As a result, the ceiling plate of the head case 6 is held between the stopper cylinder 17 and the rotary shaft 11. The rotation angle of the rotary shaft 11 is regulated by a locking claw portion 19 formed on the outer peripheral surface of the stopper cylinder 17 and a stopper 20 formed on the inner peripheral surface of the upper end of the head case 6. It has become.

The head portion 5 constructed in this manner is disposed in the faucet body 1 via the back lid 21, and is a long screw 22.
It is connected and fixed by. In this case, by disposing tubular rubber packings 24 in the hot water and water inflow ports 21a and 21b and the mixed water outflow port 23 formed in the back lid 21, the partition wall 1a of the faucet body 1 is provided. The rubber packing 24 is elastically compressed between the fixed disk valve body 7 and the fixed disk valve body 7 to seal the two members. At the same time, rubber packing 24
Presses the fixed disc valve body 7 against the movable disc valve body 8 by its elastic repulsive force, and these two valve bodies 7 and 8
The sliding surface is also sealed.

In the conventional single-lever faucet constructed as above, when the handle lever 12 is vertically swung, the ball-shaped operating portion 15 of the lever shaft 13 swings about the pin 14. The movable disc valve body 8 is shown in FIG.
To move to the left and right. As a result, the size of the opening area of each of the hot water and water inflow ports 7a and 7b of the fixed disk valve body 7 which overlaps with the mixing chamber 10 of the movable disk valve body 8 changes, and the discharge flow rate changes.

On the other hand, when the handle lever 12 is rotated in the horizontal direction shown by the arrow in FIG. 16, the rotary shaft 11 is rotated around the central axis of the head case 6 via the lever shaft 13 to move the movable disk. The valve body 8 also rotates in the horizontal plane. Therefore, the ratio of the opening area of the hot water inflow port 7a of the fixed disk valve body 7 which overlaps with the mixing chamber 10 of the movable disk valve body 8 to the opening area of the water inflow port 7b changes, and as a result, the mixing of the hot water and the water. The ratio changes and the temperature of the mixed water changes.

In this way, the single lever type faucet is
By rotating the handle lever 12 in the vertical direction and in the horizontal direction individually or in combination, the temperature and flow rate of the discharged mixed water are controlled.

[0009]

The rubber packing 24 disposed between the partition wall 1a of the water faucet body 1 and the fixed disc valve body 7 is elastically compressed and is placed between the members 1a, 7. In addition to sealing, the fixed disc valve body 7 is pressed against the movable disc valve body 8 by its elastic repulsive force, and the sliding surfaces of these two valve bodies 7 and 8 are also sealed. Therefore, when the elastic compression amount of the rubber packing 24 is small, if the fixed disc valve body 7 is pushed up even if it receives a high water pressure, a sealing failure between the members 1a and 7 may be caused, which may cause water leakage. . On the contrary, when the elastic compression amount of the rubber packing 24 is too large, the elastic repulsion force of the rubber packing 24 is too strong and the sliding resistance of both valve bodies 7 and 8 becomes large, which may deteriorate the operability of the handle lever 12. is there.

In view of the above-mentioned problems of the prior art, the present invention provides a water faucet in which there is no sealing failure even if the disc valve element moves and a large pressing force is not applied to the disc valve element. It is intended to provide a seal structure for a disc valve body.

[0011]

According to a first aspect of the present invention, there is provided a means for connecting a port of a disc valve body incorporated in a faucet body with a port of a disc holding portion provided on the faucet body side. In the seal structure, an annular seal ring accommodating portion is provided on the outer peripheral side of the connection portion of these ports, and the sealing surface of the seal ring accommodating portion is the annular seal wall surface of the disc valve body and the annular seal wall surface of the disc holding portion. The seal ring housed in the seal ring housing portion is in contact with both annular seal wall surfaces, and the seal ring housing portion has a recessed shape from the side receiving water pressure to the side not receiving water pressure. It is a seal structure of a disc valve body in a water faucet characterized by the above.

According to a second aspect of the present invention, means for arranging a back cover is provided between a bottom surface of a head case containing the disk valve body and the faucet body, or a bottom wall is provided on the head case. The seal structure for a disc valve element in a water faucet according to claim 1, wherein the disc holding portion is formed on an upper surface side of the back cover or the bottom wall of the head case. According to a third aspect of the present invention, the annular seal wall surface is formed by an outer peripheral surface of a cylindrical protruding portion protruding from one of the disc valve body and the disc holding portion, and the other annular seal wall surface is formed. The seal structure for a disc valve element in a water faucet according to claim 1 or 2, wherein the seal is formed on the inner peripheral surface of a concave portion provided on the other side.

[0013]

According to the first aspect of the present invention, the seal ring is in contact with both annular seal wall surfaces of the seal ring accommodating portion so that the seal ring accommodating portion is provided with a water pressure receiving side and a water pressure not receiving side. Seal it. When the water pressure rises, the seal ring moves in the seal ring accommodating portion toward the recessed side, bites into a wedge shape between both annular seal wall surfaces, and stops at a position where it balances with the water pressure to complete the seal. Even if the disc valve body and the disc holding part separate from each other due to an increase in water pressure, the seal ring stops at a position in balance with the water pressure, and thus completes the sealing. Conversely, when the water pressure drops,
Due to the elastic return force of the seal ring, the seal ring moves to the side opposite to the recessed side of the seal ring storage portion and stops at a position where it balances the water pressure to complete a complete seal. Since the seal ring stops at a position that balances the water pressure, it does not apply a large force to the disc valve body.

According to the second aspect of the present invention, since the disk holding portion is formed on the back cover or on the upper surface side of the head case bottom wall, the head case and the disk valve body can be integrated. . According to the third aspect of the present invention, since the cylindrical projection is fitted in the recess to form the seal ring housing portion, the thickness of the disc valve body and the disc holding portion which are overlapped can be reduced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to the embodiments shown in the drawings. 1 to 11
FIG. 4 shows a single-lever faucet according to an embodiment of the present invention. In the faucet of this embodiment, the head portion 5 of the single lever type faucet is provided with a head case 27, a lever shaft 28, a rotary shaft 29, a disc cap 30, a movable disc valve body 31, a fixed disc valve body 32, It is composed of a back cover 33.

As shown in FIGS. 4A and 4B, the head case 27 has guides 34 formed along the axial direction at several circumferential positions on the inner peripheral surface thereof.
The main body of the lever shaft 28 has a quadrangular prism shape, and a main operating portion 35 and a sub operating portion 36 having an involute curved surface are formed in a bifurcated shape on the lower end side thereof.

A boss portion 38 is formed so as to project from one end surface side of the pin hole 37 of the lever shaft 28. This boss part 3
Reference numeral 8 is for preventing the wrong orientation of the lever shaft 28 when it is mounted.

The rotating shaft 29 has a small-diameter upper tubular portion 39,
The upper tubular portion 39 has a large-diameter lower tubular portion 40, and the edge portion of the upper end surface of the upper tubular portion 39 is an R surface portion. Further, an insertion hole 41 for the pin 14 is formed in the upper tubular portion 39 so as to penetrate the side surface thereof, and a recess 42 for grease storage is formed around the outer peripheral surface on one end side of the insertion hole 41. There is.

On the other hand, on the lower surface side of the lower tubular portion 40, two R-shaped slide grooves 43, 43 are formed in the diameter direction. Further, locking projections 44 that can be engaged with the guides 34 formed on the inner peripheral surface side of the head case 27 are formed to project at several locations on the outer peripheral side surface of the lower tubular portion 40.

Further, the rotary shaft 29 is formed with a mounting hole 45 for the lever shaft 28 which vertically penetrates the upper and lower cylindrical portions 39 and 40. The mounting hole 45 is used for the lever shaft 2
A groove that engages with and guides the boss portion 38 of the lever shaft 28 is formed from the lower surface side of the mounting hole 45 toward the upper end surface thereof so that it does not come out through to the upper side. There is.

The disc cap 30 has two slide grooves 43 provided on the upper surface thereof on the lower surface of the rotary shaft 29.
43, which are capable of engaging with the ridges 43,
The main operating portion 3 of the lever shaft 28 is provided at the intermediate portion between the two.
5, a rack groove 47 and a convex tooth 48 that can be engaged with the sub operation portion 36 are formed. Also, the disc cap 30
An oval or elliptical convex portion 49 is formed on the lower surface side of the.

Further, on the lower surface side of the disc cap 30, there is formed a recess 50 for forming a mixing chamber of hot water and water, and a piston mounting hole 51 for communicating with the water hammer is formed in communication with the recess 50. Has been formed. One end of the piston mounting hole 51 is open to the side surface of the disc cap 30.

On the upper surface side of the movable disc valve body 31, there is formed a concave portion 52 which fits with the oval or elliptical convex portion 49 of the disc cap 30 (see FIG. 8), and a rubber is provided between the two. The packing 53 is attached. A concave portion 54 for forming a mixing chamber is formed on the lower surface side of the movable disc valve body 31, and the concave portion 54 and the concave portion 52 communicate with each other.

On the other hand, the fixed disc valve body 32 is
It has the shape of a goldfish when viewed from above. As shown in FIGS. 9A and 9B, the fixed disc valve body 32 has a hot water inflow port 55 and a water inflow port 56.
A mixed water outflow port 57 is formed so as to penetrate the upper and lower surfaces. Recesses 58 are formed on the lower surface side of the disk valve body of these ports 55, 56, 57, respectively.

Further, as shown in FIG.
Hot water inflow ports 59 and 60 and mixed water outflow port 61 of the same shape are formed at the same positions as the fixed disc valve body 32, and the disc valve body upper surface side of each of these ports is shown in FIG. 7 and FIG. As shown in FIG. 11, a cylindrical projecting portion 68 having a tapered surface 62 whose diameter decreases upward is formed on the outer periphery.
Is provided. In addition, between the tapered surface 62 and the recess 58 of each port of the fixed disc valve body 32, the seal ring housing portion 69 (see FIG. 11) goes from the side receiving the water pressure to the side not receiving the water pressure. The seal ring 63 is formed so as to have a recessed shape. Moreover, on the upper surface side of the back cover 33, the recess 6 having the same shape and size as the fixed disk valve body 32 is formed.
4 is formed to serve as a disk holding portion. Around the concave portion 64, as shown in FIG. 10A, a convex portion 65 is partially formed.

Next, an assembling procedure of the head portion 5 of the single lever type water faucet thus constructed will be described. To assemble, first, the lever shaft 28 is inserted upward into the mounting hole 45 of the rotary shaft 29 from the lower side thereof. Then, at the position where the boss portion 38 provided on the lever shaft 28 is engaged with the inner portion of the guide groove formed on one side surface of the mounting hole 45, the pin 14 is attached to the rotary shaft 2.
9 and the lever shaft 28, and they are integrally connected so that the lever shaft 45 can swing in the mounting hole 45 with the pin 14 as a pivot.

Thus, in this embodiment, the pin 14
The connection by means of only the two members of the rotary shaft 29 and the lever shaft 28, and the connection outside the head case 27, is extremely easy.

After that, the lever shaft 28 and the rotary shaft 29 are mounted in the mounting holes 66 of the head case 27 with the head case 27 turned upside down. The mounting can be easily performed by bringing the outer peripheral surface side of the rotary shaft 29 into contact with the guide 34 on the inner peripheral surface of the head case 27 shown in FIG. 4A. Moreover, in this case, the edge portion of the upper end surface of the upper tubular portion 39 of the rotary shaft 29 is formed into the R surface, and the mounting in the mounting hole 66 is very smooth.

After the mounting of the rotary shaft 29, the locking projections 44 on the outer peripheral surface of the rotary shaft 29 are locked to the guides 34, and the rotation range of the rotary shaft 29 is regulated. FIGS. 5A and 5B show a state in which the locking projections 44 of the rotary shaft 29 are in contact with the guides 34 at the limit positions of their respective rotation ranges, and the rotation is restricted. Is. By providing the rotary shaft 29 and the guide 34 with the stopper function in this manner, it is possible to omit the parts of the conventional stopper cylinder body 17 shown in FIGS. 15 and 17.

After that, with the head case 27 turned upside down, the disc cap 30 is attached to the lower surface of the rotary shaft 29.
Then, the concave portion 52 of the same shape of the movable disc valve body 31 is externally fitted and attached to the oval or elliptical convex portion 49 of the disc cap 30. This allows the disc cap 3
0 and the movable disc valve body 31 can be integrally operated in any direction in a horizontal plane without a gap.

Then, the fixed disc valve body 32 is placed on the movable disc valve body 31, and the recess 64 of the same shape as the fixed disc valve body 32 of the back cover 33 is inserted into the fixed disc valve body 3.
2 is externally fitted to the back cover 33, and fixed to the back cover 33.
Fix both so that 2 does not move. When the back cover 33 is externally fitted and mounted on the fixed disc valve body 32, the seal ring 63 is preliminarily fitted and mounted on each recess 58 of the fixed disc valve body 32, and the corresponding cylindrical protrusion of the back lid 33 is attached to each seal ring 63. The part 68 is inserted.

Finally, the head case 27 thus assembled is inserted into the faucet body 1, and the head case 27 is inserted.
It may be reversed so that the upper and lower sides return to the original state and fixed to the faucet body 1 together with the back cover 33 using a long screw in the same manner as in the conventional case. As a result, the faucet body 1, the back cover 33, and the head case 27 are integrally connected by screws. Therefore, the fixed disc valve body 32 fitted and mounted in the recess 64 of the back cover 33 is integrated with the faucet body 1, and cannot move unnecessarily relative to the movable disc valve body 31. Absent.

Further, as shown in FIG. 11, the back cover 33 and the fixed disc valve body 32 have a seal ring accommodating portion 69 between the cylindrical protruding portion 68 of the back lid 33 and the recess 58 of the fixed disc valve body 32. The seal ring 63 attached to the seal ring housing portion 69 is sealed by contacting the annular seal wall surfaces 62 and 58a. When the water pressure at this sealing point rises, the seal ring 63 moves in the direction of the arrow B toward the recessed side of the seal ring storage portion 69 and bites into a wedge shape between both annular seal wall surfaces 62 and 58a to balance the water pressure. Stop at the desired position to complete the seal. Even if the fixed disc valve body 32 rises due to the increase in water pressure and separates from the back cover 33 forming the disc holding portion, the seal ring 6
No. 3 stops at a position where it balances with the water pressure, so complete sealing is performed. Conversely, when the water pressure drops, the seal ring 6
Due to its elastic return force, the No. 3 moves to the opposite side to the recessed side of the seal ring housing section 69 and stops at a position where it balances the water pressure, and completes the sealing.

As described above, since the seal ring 63 stops at the position where it balances with the water pressure, the fixed disc valve body 32
Therefore, a good operability of the handle lever 12 is ensured without applying a large pressing force and increasing the sliding resistance between the fixed disc valve body 32 and the movable disc valve body 32.

The usage of the faucet of this embodiment is as follows.
As in the conventional case, the discharge flow rate and the mixed water temperature are controlled by raising and lowering the handle lever 12 and rotating the handle lever 12. By raising and lowering the handle lever 12, the main operating portion 35 and the sub operating portion 3 of the lever shaft 28 are
2 through the disk cap 30 and the movable disk valve body 31 that operates integrally with the disk cap 30.
Move to the state of maximum discharge flow rate.

At this time, the main operating portion 35 and the sub operating portion 36 are joined to the disc cap 30 through the involute curved surface, and the joining surfaces change with each other, so that wear locally progresses. However, it does not cause rattling. Further, by using the involute curved surface, even if there is a pivotal movement about the pin 14 of the lever shaft 28 as a fulcrum, it is possible to move the disc cap 30 horizontally without prying it, so that the valve body can be smoothly moved. It is possible to secure the operation. The same effect can be obtained even if the involute curved surface is a cycloid curved surface.

By rotating the handle lever 12, the slide grooves 43, 43 of the rotary shaft 29 and the projections 46, 46 of the disc cap 30 are engaged with each other so that they rotate together. Become. On the lower surface side of the disc cap 30, an oval or elliptical concave and convex portion 49,
Since the movable disc valve body 31 is mounted via 52, the movable disc valve body 31 has an opening area ratio of the hot water port 55 of the fixed disc valve body 32 communicating with the mixing chamber 54 and the water port 56. To change the temperature of the mixed water.

In this case, the engagement between the rotary shaft 29 and the disc cap 30 is made by sliding the slide grooves 43, 43.
By using the convex ridges 46, 46, it is possible to eliminate the gap in the rotational direction between them. Further, by fitting the disc cap 30 and the movable disc valve body 31 through the oval or elliptical concave-convex portion, it is possible to remove the gap in the rotational direction between them.

Therefore, in the water faucet of this embodiment, it is possible to eliminate the play of the handle operation, and the operation feeling is good. Moreover, since the fixed disc valve body 32 does not move unnecessarily, the temperature of the mixed water can be controlled corresponding to the operation of the movable disc valve body 31, and the control is accurate.

By the way, the present invention is not limited to the seal structure of the above-mentioned embodiment. It is important to move the seal ring housing from the side receiving water pressure to the side not receiving water pressure so that the seal ring that seals the joint between the disc valve body and the disc holding part is stopped at a position that balances water pressure. It is to make the tip dent shape.

As such a modified example, the one shown in FIGS. 12 to 14 can be considered. FIG. 12 shows an annular seal wall surface 58a of the fixed disc valve body 32.
Is formed in a taper shape, and the ratio of the front recesses of the seal ring storage portion 69 is made gentler than in the case shown in FIG.

FIG. 13 shows a fixed disc valve body 3.
On the lower surface side of each port of No. 2, a cylindrical projecting portion 73 having a tapered surface 72 whose outer diameter is reduced downward is formed. The back cover 33 is provided with a recess 74 into which the cylindrical protrusion 73 is fitted, and a recess is formed between the annular seal wall surface 74a of the recess 74 and the tapered surface 72 from the water pressure receiving side to the water pressure not receiving side. A seal ring storage portion 75 having a shape is formed. The seal ring storage portion 75 stores the seal ring 63 that abuts against the annular seal wall surface 74 a and the tapered surface 72.

In the structure shown in FIG. 14, the annular seal wall surface 74a of the back cover 33 is formed in a taper shape, and the ratio of the concavities of the seal ring accommodating portion 75 is made gentler than in the case shown in FIG.

In addition to the above-described embodiments, the present invention omits the back cover 33, and the cylindrical projection 68 formed on the back cover 33 is formed on the partition wall on which the head case 27 of the faucet body 1 is placed. Can also be formed.

Further, a bottom wall having the same shape as that of the back cover 33 is integrally formed on the head case 27, and the fixed disk valve body 32 is fitted and mounted on the upper surface side of the bottom wall to have the same shape. It is also possible to form a cylindrical protrusion. In this case, the rotary shaft 29, the disc cap 30, the fixed or movable disc valve bodies 31, 32, etc. may be mounted by opening and closing the ceiling side of the head case 27 so as to be openable and closable. .

[0046]

As described above, the present invention has the following excellent effects. According to the present invention of claim 1, since the seal ring stops at a position where it balances with the water pressure,
A perfect seal can be performed regardless of the strength of water pressure to prevent water leakage. Furthermore, since a large pressing force is not applied to the disc valve body, smooth operation of the disc valve body can be ensured. According to the second aspect of the present invention, the head case and the disc valve body can be integrated with each other, so that the faucet body can be easily assembled. According to the third aspect of the present invention, since the thickness of the disc valve body and the disc holding portion that are overlapped with each other can be reduced, a compact water faucet can be provided.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a vertical cross-sectional view showing a head portion when a water faucet is closed.

FIG. 2 is a vertical cross-sectional view showing a head portion at the maximum discharge flow rate of the water faucet.

FIG. 3 is a partial cross-sectional side view showing the entire faucet.

4A and 4B show a head case of the water faucet, wherein FIG. 4A is a bottom view and FIG. 4B is a sectional view taken along line AA of FIG. 4A.

5A and 5B show an engagement relationship between the head case of the water faucet and a rotating shaft, FIG. 5A is a bottom view showing a discharge state of only hot water, and FIG. 5B is a bottom view showing a discharge state of only water. It is a figure.

FIG. 6 is a partially longitudinal sectional front view showing the main components of the head part of the water faucet in an exploded manner.

FIG. 7 is a side view, which is a partial vertical cross-sectional view showing an exploded main part of the head part of the water faucet.

8A and 8B show a movable disc valve body of the water faucet, wherein FIG. 8A is a plan view and FIG. 8B is a bottom view.

9A and 9B show a fixed disc valve body of the water faucet, FIG. 9A being a plan view and FIG. 9B being a bottom view.

FIG. 10 shows a back cover of the faucet, FIG. 10 (a) is a plan view, and FIG. 10 (b) is a bottom view.

FIG. 11 is an enlarged cross-sectional view of a seal structure of a disc valve body in the water faucet.

FIG. 12 shows another embodiment of the present invention,
It is sectional drawing which expanded the sealing structure of a disc valve body.

FIG. 13 shows an embodiment of another aspect of the present invention,
It is sectional drawing which expanded the sealing structure of a disc valve body.

FIG. 14 is a cross-sectional view showing an embodiment of yet another aspect of the present invention, in which the seal structure of the disc valve body is enlarged.

FIG. 15 is a vertical sectional side view showing the entire conventional single-lever faucet.

FIG. 16 is a partial cross-sectional front view showing the entire conventional single-lever faucet.

FIG. 17 is an exploded perspective view showing a head portion of a conventional single lever type water faucet.

[Explanation of symbols]

 1 ... Faucet body 32 ... Disc valve body (fixed disc valve body) 55 (56, 57) ... Port 33 ... Disc holding portion (back cover 33) 60 (59, 61) ... Port 69 (75) ... Seal ring storage Part 58a, 60 (74a, 72) ... Annular seal wall surface 63 ... Seal ring

Front page continuation (72) Inventor Kuniaki Sakakibara 5-1-1 Koiehoncho, Tokoname City, Aichi Prefecture Inax Co., Ltd.

Claims (3)

[Claims] 1. A seal structure for a connecting portion between a port of a disc valve body built in a faucet body and a port of a disc holding portion provided on the faucet body side, wherein an annular seal is provided on the outer peripheral side of the connecting portion of these ports. A ring accommodating portion is provided, and a sealing surface of the seal ring accommodating portion is formed by an annular seal wall surface of the disc valve body and an annular seal wall surface of the disc holding portion, and both seal rings accommodated in the seal ring accommodating portion are provided. The seal structure for a disk valve element in a water faucet, wherein the seal ring housing portion has a concave shape from the side receiving water pressure to the side not receiving water pressure. 2. A back cover is disposed between the lower surface side of the head case containing the disk valve body and the faucet body, or a bottom wall is provided on the head case, and the back cover or the head case bottom wall is provided. The disk holding part is formed on the upper surface side.
A sealing structure for a disc valve element in the water faucet described. 3. The annular seal wall surface is formed by an outer peripheral surface of a cylindrical projection portion projectingly provided on one of the disc valve body and the disc holding portion, and the other annular seal wall surface is formed.
3. The inner peripheral surface of a concave portion provided on the other side.
A sealing structure for a disc valve element in the water faucet described.