JPH0861530A - Valve element operating mechanism of single lever type water cock - Google Patents

Abstract

PURPOSE: To transmit the pressing force of an operation part furnished on a lever shaft of a single lever type water cock effectively to the member to be pressed and also suppress the wear of a contact parts. CONSTITUTION: An involute surface is used to form the pressing force acting surface of an operation part 24 which is provided on a lever shaft 20 pivoted by a pin 25 on a rotary shaft 30. Thereby the operation part of the lever shaft is kept in the line contact condition with that surface of the member to be pressed onto which the pressing force should act, so that the arcuate motions of the lever shaft can be converted effectively into the plane motions of a movable valve disc. Because the contacting part is not concentrated in any specific place, propagation of the wear goes slow, and there is no risk of generating local wear.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve body operating mechanism in a single lever type faucet which operates a single lever handle to switch between water discharge and water stoppage, flow rate control and water temperature control.

[0002]

17 to 19 show a conventional single lever type faucet (hereinafter referred to as a conventional faucet).
As shown in FIG. 17, in this conventional faucet 100, a hot water supply pipe 102 and a water supply pipe 103 are connected to the bottom surface of a faucet body 101, and a discharge that protrudes forward from the vicinity of the base of the central part of the faucet body 101. The portion 104 is integrally formed, and a handle lever 105 for operation is attached to the head. Also in FIG.
As shown in, the valve operating mechanism 110 is incorporated in the upper region of the central portion of the faucet body 101.

As shown in the exploded view of FIG. 19, the valve operating mechanism 110 includes a lever shaft 120, a pin 125 and a stopper 13.
0, case 140, rotating shaft 150, disk cap 1
60, movable disc valve body 170, fixed disc valve body 18
0 and a back cover 190. The outline of these assembling procedures is as follows.

First, the rotary shaft 150 is inserted into the case 140 from the lower side so that a part of the rotary shaft 150 is projected from the upper end opening 141 of the case 140. The lever shaft 120 is internally mounted on the projecting portion and the stopper 130 is externally mounted. After that, the pins 125 are inserted by aligning the positions of the respective insertion holes 121, 131, 151 to join the three members. As a result, the lever shaft 120 can swing with respect to the rotating shaft 150, and the lever shaft 120, the stopper 130, and the rotating shaft 150 can rotate integrally. The rotation range of the rotary shaft 150 is restricted by the engagement of the projection 132 provided on the side peripheral surface of the stopper 130 and the engagement portion 142 formed on the upper surface of the case 140. In addition, the notch 143 on the upper surface of the case
Is the lever shaft 120, the stopper 130, and the rotary shaft 15.
This is for inserting the pin 125 from the side in a state where 0s are integrally combined.

In the case 140, a disk cap 160 and a movable disk valve body 170 are provided below the rotary shaft 150.
The fixed disc valve body 180 and the fixed disc valve body 180 are housed in an overlapping state, and the bottom surface of the case 140 is closed by the back cover 190 (see FIG. 18).

The disc cap 160 has a fitting concave portion 161 having an inner surface formed in a spherical shape on its upper surface, and a spherical action portion 122 formed at the lower end portion of the lever shaft 120 is fitted therein. The movable disc valve body 170 into which the disc cap 160 is fitted has a space 17 at the center.
1, and the space 171 and the disc cap 160 form a hot and cold water mixing chamber (see FIG. 18). The fixed disc valve body 180 has a hot water inflow port 181,
A back cover 1 having a water inflow port 182 and a mixed hot water outflow boat 183 and arranged on the lower surface of the fixed disc valve body 180.
At 90, a hot water inflow port 191, a water inflow port 192, and a mixed hot water outflow port 193 corresponding to the respective ports of the fixed disc valve body 180 are opened.

As described above, the valve operating mechanism 110 housed in the case 140 is arranged in the central portion of the faucet body 101 and is fixed by the long pierce 200. In this prior art example, as shown in FIG. 18, tubular packings 210 are provided in the hot water inflow port 191, the water inflow port 192, and the mixed hot water outflow port 193 of the back cover 190, respectively.
By elastically compressing the packing 210 between the partition wall 106 of the faucet body 101 and the fixed disc valve body 180,
Maintains the sealing property of each inflow and outflow port. At the same time, the compressed packing 210 causes the fixed disc valve body 18
Since the elastic repulsive force is exerted on 0, the fixed disc valve body 180 is pressed against the movable disc valve body 170, and the sealing performance at the contact surfaces of both is improved. The handle lever 105 is connected to the upper end of the lever shaft 120.

The conventional faucet 100 configured as described above is
When the handle lever 105 is rotated in the vertical direction, the action portion 122 of the lever shaft 120 swings around the pin 125, and the movable disc valve body 170 moves to the fixed disc valve body 1.
Slide on 80. Thereby, the movable disc valve body 1
Since the area in which the mixing chamber formed by the void portion 171 of 70 and the hot water inflow port 181, the water inflow port 182, and the outflow port 183 of the fixed disk valve body 180 overlap with each other changes, the discharge flow rate can be increased or decreased.

On the other hand, when the handle lever 105 is rotated in the horizontal plane in the directions indicated by the arrows Y ₁ and Y ₂ in FIG. 17, the rotary shaft 150 is rotated through the lever shaft 120.
It rotates about the central axis of 0, and at the same time, the movable disk valve body 170 rotates on the upper surface of the fixed disk valve body 180. As a result, the area ratio of the hot water inflow port 181 and the water inflow port 182 of the fixed disc valve body 180, which overlaps with the gap 171 of the movable disc valve body 170, changes,
As a result, the mixing ratio of hot and cold water changes, so that the temperature of the mixed hot water can be raised or lowered.

As described above, the conventional faucet has the handle lever 1
The flow control and the temperature control of the mixed hot water to be discharged are performed by operating 05 by appropriately combining the vertical rotation and the rotation in the horizontal plane.

[0011]

In the conventional valve body operating mechanism of the faucet, the operating portion 122 at the tip of the lever shaft 120 is formed in a spherical shape, and the operating portion 122 is formed in the fitting recess 161 of the disc cap 160 for exerting a pressing force. The surface is also formed in a spherical shape. Therefore, the operating portion 122 of the lever shaft 120 and the fitting recess 161 of the disc cap 160 make point contact with each other, so that a large sliding frictional force is generated when operating the handle lever 105, which may impair operability. is there. In addition, since a large sliding frictional force acts locally, there is a disadvantage that the operating portion 122 or the fitting concave portion 161 wears rapidly. If the wearing progresses significantly, the operating portion 122 is used.
And a gap is formed between the fitting recess 161 and the handle lever 105, which causes rattling.

Furthermore, since the operating portion 122 applies a pressing force to the fitting concave portion 161 in a point contact state, the pin 12
The pressing force transmitted from the operating portion 122 of the lever shaft 120, which moves in an arc around 5,
There is a problem that it is not efficiently converted into a plane motion of 0. This is because the operating portion 122 and the fitting concave portion 161 are in point contact with each other between spherical surfaces, so that the fitting concave portion 1 is moved from the operating portion 122.
This is because the pressing force transmitted to 61 includes many vertical components. As a result, the operating portion 122 of the lever shaft 120 pushes up the disc cap 160 or pushes it against the disc cap 160, which may cause the movable disc valve body 170 to move up and down.

[0013]

The present invention was devised in view of the above-mentioned conventional problems, and is characterized in that the upper surface of a fixed disk valve body having an inflow port and an outflow port, A movable disk valve body is mounted on the fixed disk valve body to slide the upper surface of the fixed disk valve body to communicate with the inflow port and the outflow port and to control the opening area of each port. The movable disk valve body is moved to the movable disk valve body. In a valve body operating mechanism in which a lever shaft for giving a pressing force for pivoting is pivotally supported, a pressing force acting surface in an operating portion for applying a pressing force provided on the lever shaft is an involute curved surface or a cycloid curved surface. That is what I formed.

According to the present invention, the portion of the lever shaft on which the pressing force is applied is composed of a main operating portion and a sub operating portion, and the axis of the main operating portion is the lever shaft main rest portion. It is also possible to adopt a configuration in which the pressing force acting surfaces of the main operating portion and the sub operating portion are formed in an involute curved surface or a cycloid curved surface while being set so as to be inclined with respect to the axis line.

[0015]

[Operation] By forming the pressing force acting surface of the operating portion of the lever shaft on the involute curved surface or the cycloid curved surface, the acting surface of the pressing force is, for example, a tapered surface having an appropriate gradient, so that the contact between the two is made. Can be brought into a line contact state, and this line contact state is held while moving the contact portion according to the swing of the lever shaft. Therefore, since the contact area is small, the progress of wear is slow, and moreover, the contact points do not concentrate on a specific part,
Local occurrence of wear is also suppressed. Further, because of the line contact, the pressing force due to the arc movement of the lever shaft is efficiently converted into the plane movement of the pressed member.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of a single lever type hot and cold water mixing faucet according to the present invention (hereinafter referred to as the present invention's faucet) will be described below with reference to the drawings showing the embodiments. As shown in FIG. 1, the appearance of the faucet 1 of the present invention is the same as that of a conventional faucet, and a mixed hot water discharge part 3 projects forward from the vicinity of the base of the faucet body 2 and a handle lever 4 for operation is provided on the head. It is installed. A valve operating mechanism 10 is housed in the upper portion of the faucet body 2 as shown by a cutout.

As shown in FIGS. 2 and 3, the valve operating mechanism 10 of the faucet 1 of the present invention mainly includes a lever shaft 20, a rotary shaft 30, a disc cap 40, a movable disc valve body 50, and a fixed disc valve body 60. As shown in FIGS. 4 and 5, these components are assembled and housed in a case 70, and the bottom is closed by a back cover 80.

The lever shaft 20 has a main body 21 having a substantially rectangular column shape, a pin hole 22 formed at a slightly lower position, a main operating portion 24 at a lower end portion, and a short projecting auxiliary operating portion 2.
5 and 5 are formed in a bifurcated shape. Further, on one side surface of the main body portion 21, a boss portion 23 is formed by slightly projecting an annular region around the opening of the pin hole 22. The reason for providing the sub operating portion 25 in addition to the main operating portion 24 is to prevent excessive force from being concentrated on the main operating portion 24 by sharing the pressing action on the disc cap 40 described later. As shown in the figure, the main operating portion 24 is provided slightly inclined with respect to the main body portion 21, and in this embodiment, the central axis of the main body portion 21 and the central axis of the main operating portion 24 are pin holes 22. It is set to intersect at an angle of about 15 ° at the center of. The pressing force acting surface of the lever shaft 20 is two side surfaces 24 a and 24 b parallel to the axis of the pin hole 22 of the main operating portion 24 and one side surface parallel to the axis of the pin hole 22 of the sub operating portion 25. 25a,
Each of these is formed as an involute curved surface or a cycloid curved surface.

The rotary shaft 30 is composed of a cylindrical upper half portion 31 having a small diameter and a lower half portion 32 having a large diameter. The cylindrical upper half portion 31 has a pin insertion hole 33 penetrating a side surface and a vertical direction. An insertion hole 36 penetrating therethrough is provided. The insertion hole 36 is for inserting the lever shaft 20 from below, and is substantially rectangular in a plan view, and the pin insertion hole 33 shown in FIG.
When viewed in a cross-sectional view perpendicular to the axis line of, there are tapered portions 37 and 38 that expand upward and downward with respect to the position of the pin insertion hole 33. This tapered portion 37, 38
Has a stopper function of restricting the rotation range of the lever shaft 20. Further, on the inner surface of the insertion hole 36, a guide groove 39 that can be engaged with the boss portion 23 of the lever shaft 20 is provided in the pin insertion hole 33 from the lower end in the axial direction in order to prevent the lever shaft 20 from coming out upward. It is formed all over. On the outer peripheral surface of the cylindrical upper half portion 31, an arcuate shallow recess 34 is formed around one opening of the pin insertion hole 33. The recess 34 is for storing a lubricant such as grease. Further, the edge portion 31a of the upper end surface of the tubular upper half portion 31 is formed into a curved surface. On the other hand, the lower half portion 32 of the rotary shaft has two curved slide grooves 32a, 32a formed in parallel on the lower surface thereof, and a stopper 32b of a disc cap 40 described later is provided at one end portion thereof. The stopper 32b also serves as a locking portion of the piston 97 of the water hammer relaxation mechanism incorporated in the disc cap 40. Further, on the side peripheral surface of the lower half portion 32 of the rotating shaft, a locking projection 3 capable of engaging with a guide 73 of a case 70 described later.
5 is projected at several places.

The disc cap 40 (see FIGS. 2, 3 and 7) has an engagement region with the lever shaft 20 at the center of the upper surface. The engagement area is composed of a rack groove 41 having a tapered cross-section that expands upward, and a tooth-like protrusion 42 having a curved surface slightly protruding from the upper surface. Then, the inner surface of the rack groove 41 engages with the main operating portion 24 of the lever shaft 20, and the outer surface of the tooth-like projection 42 engages with the sub operating portion 25, respectively, and these surfaces serve as the surfaces to which the pressing force is applied. In addition, a shallow groove 43 communicating with the rack groove 41 is provided at the base of the tooth-like projection 42,
A groove 41a is also provided in the center of one side surface of the rack groove 41. The rack groove 41 and these grooves 41a and 43 are filled with a lubricant such as grease. Further, two parallel ridges 44, 44 are provided so as to sandwich both sides of the engagement area, and these ridges 44, 44 come into contact with the slide grooves 32a, 32a on the lower surface of the rotary shaft 30. As shown in FIG. 7C, a convex portion 46 having an oval or elliptical planar shape is formed on the lower surface of the disc cap 40, and a concave portion 47 is formed inside the convex portion 46. Furthermore, the disc cap 40
A storage chamber 45 of the water hammer relaxation mechanism is formed in the diametrical direction on the side surface of the storage chamber 45 and the recess 4
7 is communicated with a small hole 48.

As shown in FIGS. 2 and 8, the movable disc valve body 50 has an opening portion 51 penetrating the upper and lower surfaces and having different opening areas on the upper surface side and the lower surface side. The upper surface side opening 52 is formed in an oval shape or an elliptical shape having a large opening area, and a strainer 94 and a packing 95 (see FIGS. 4 and 5) are inserted in the opening 52 so that the convex portion 46 of the disc cap 40 is formed. By fitting them together, both are integrated. At this time, the opening 51 forms a hot and cold water mixing chamber together with the recess 47 on the bottom surface of the disc cap 40.

As shown in FIGS. 2, 3 and 9, the fixed disc valve body 60 has three through holes penetrating the upper and lower surfaces, and the hot water inflow port 61 and the water inflow port 6 respectively.
2 and the mixed hot water outflow port 63. On the upper surface, a plurality of shallow large and small recesses 63 and 64 for storing a lubricant such as grease are arranged in appropriate places. Recesses 66, 67, 68 are formed around the openings on the lower surface side of the ports 61, 62, 63.

The case 70 has the main constituent members housed therein and the bottom is closed by a back cover 80, and is formed in a substantially cylindrical shape as shown in FIGS. 10 (a) and 10 (b). The upper opening 71 has a smaller diameter than the bottom opening 72. Further, on the inner peripheral surface, an appropriate number of axial guides 73 are formed so as to project at appropriate intervals in the circumferential direction. The diameter of the upper opening 71 is set to be substantially equal to the diameter of the cylindrical upper half portion 31 of the rotary shaft 30. Also, case 7
An annular groove 74 for storing a lubricant such as grease is formed around the upper opening 71 on the inner surface of the ceiling portion 0. Further, on the ceiling wall of the case 70, the case 70
Hole 7 for inserting a long screw to fix the water to the faucet body 2
5 are provided, and an appropriate number of locking claws 76 for mounting the back cover 80 are provided on the bottom surface.

As shown in FIG. 11, the back cover 80 is formed with a recessed portion 84 having a substantially same plane shape into which the fixed disc valve body 60 can be fitted, and each of the fixed disc valve body 60. A hot water inflow port 81, a water inflow port 82, and a mixed hot water outflow port 83 penetrating the upper and lower surfaces are formed at positions corresponding to the ports 61, 62, and 63. Moreover, convex portions 86, 87, 88 projecting from the bottom surface of the concave portion 84 are formed around the openings on the upper surface side of the ports 81, 82, 83, respectively.
The outer peripheral surfaces of 7, 88 are tapered surfaces whose diameter decreases upward. These convex portions 86, 87, 88 are in the recesses 66, 67, 68 around the ports 61, 62, 63 formed on the lower surface of the fixed disc valve body 60 when the fixed disc valve body 60 is laid on top of each other. It is set to be fitted via a packing 96 (see FIG. 4). A ridge 85 for preventing the positional displacement of the fixed disc valve body 60 is partially formed at a proper position around the upper surface side recessed portion 84. Further, the back cover 80 includes the ports 81, 82, 8
In addition to 3, the valve operating mechanism 10 has a case 70 housed inside.
Screw insertion hole 89 for assembling with the faucet body 2 together
A ventilation hole 90 for ventilation and water passage is provided therethrough. Further, a notch step portion 91 for engaging the locking claw 76 provided on the bottom surface of the case 70 is formed at an appropriate position on the side peripheral surface of the case back 80 (see FIG. 11B).

Next, by assembling the above-mentioned constituent members,
A procedure for constructing the valve operating mechanism 10 of the water faucet 1 of the present invention will be described. The assembly procedure is as follows:
Is inserted into the insertion hole 36 from below the rotary shaft 30,
The upper end of the lever shaft 20 is projected from the upper surface of the rotary shaft 30. At this time, the boss portion 23 provided on the side surface of the lever shaft 20.
Is fitted into the guide groove 39 formed on the inner peripheral surface of the rotary shaft 30, so that the lever shaft 20 is easily stopped at a position where the pin hole 22 of the rotary shaft 30 and the pin insertion hole 33 of the rotary shaft 30 match. be able to. Then, the pin 25 is attached to the rotary shaft 30.
The lever shaft 20 by inserting it into the pin insertion hole 33 of
Is swingably integrated with the rotary shaft 30.

Subsequently, the rotary shaft 30 integrally attached with the lever shaft 20 is inserted from the lower side of the case 70, and the rotary shaft 3
The cylindrical upper half 31 of 0 is projected from the upper opening 71 of the case 70. This operation may be performed with the case 70 turned upside down and the bottom opening 72 facing upward. In this embodiment, as shown in FIG. 12 (the lever shaft 20 is omitted), the guide 73 provided on the inner peripheral surface of the case 70 is set so as to contact the outer peripheral surface of the lower half portion 32 of the rotating shaft. With
Since the edge portion 31a of the cylindrical upper half portion 31 is formed into the curved surface,
The mounting work of the rotating shaft 30 to the case 70 is easy. Further, since the locking projection 35 provided on the outer peripheral surface of the rotating shaft 30 engages with the guide 73 on the inner surface of the case 70, the rotating shaft 3
The rotatable range of 0 is restricted between the guides 73, 73.
Further, as shown in FIGS. 4 and 5, the inner surface 7 of the ceiling portion of the case 70 is
7 and the upper surface 32c of the lower half portion 32 of the rotary shaft are formed as tapered surfaces whose diameters decrease upward, the degree of closeness between the two can be increased.

Next, while keeping the case 70 upside down, the disc cap 40 and the movable disc valve body 50 are placed on the lower surface of the rotary shaft 30 in an overlapping manner. At this time, the two ridges 44, 44 of the disc cap 40 are
The main operating portion 24 of the lever shaft 20 is inserted into the rack groove 41 of the disc cap 40 while being brought into contact with the parallel slide grooves 32a, 32a of the rotary shaft 30. The disc cap 40 and the movable disc valve body 50 are integrated by fitting the former convex portion 46 into the upper surface opening portion 52 of the latter with the strainer 94 and the packing 95 sandwiched therebetween, so that the lever is integrated. As the shaft 20 swings, the disc cap 40 and the movable disc valve body 50 can be moved integrally. The storage chamber 45 of the disc cap 40 accommodates a water hammer mitigation mechanism including a piston 97, a valve 98 and a valve case 99. In this embodiment, the rack groove 41 is formed so as to be displaced from the center, and the main operating portion 24 of the lever shaft 20 is inclined with respect to the main body portion 21. 24 and the rack groove 41 without impairing the proper fitting state of the rack groove 41 to the disk cap 40.
The area where 5 can be formed is secured.

Subsequently, the fixed disc valve body 60 is placed on the movable disc valve body 50, then the back cover 80 is placed on the fixed disc valve body 60 via the packing 96, and the locking claws of the case 70 are arranged. 76 to the notch 91 of the back cover 80
And the bottom of the case 70 is closed. At this time, the fixed disc valve body 60 is provided with a recess 84 formed in the back cover 80.
While fitting inside, each port 81, 82,
The convex portions 86, 87, 88 provided around 83 are fitted into the concave portions 66, 67, 68 provided around the ports 61, 62, 63 of the fixed disk valve body 60. With this configuration, the fixed disc valve body 60 is attached to the back cover 80 without easily causing a positional displacement.

Thereafter, in this way, the valve body operating mechanism 1
The case 70 in which 0 is incorporated is turned upside down to return to a normal state, and this is placed at a predetermined position on the faucet body 2,
As in the conventional case, the case 70 may be fixed by using a long screw that vertically penetrates the case 70.

The mode of use of the faucet 1 of the present invention is common to conventional faucets. That is, by moving the handle lever 4 attached to the upper end portion of the lever shaft 20 up and down, the main operating portion 24 of the lever shaft 20 is rotated around the pin 25, and the movable disc valve integrated with the disc cap 40. Body 5
The flow rate can be controlled by moving 0 between the water stop position shown in FIG. 4 and the position of the maximum discharge amount shown in FIG. At this time, in the vicinity of the water stop position, the central portion of the main operating portion 24 presses the inner surface of the rack groove 41 of the disc cap 40, but in the vicinity of the maximum discharge amount position, the tip portion of the main operating portion 24 holds the disc cap 40 in place. Since the pressure must be applied, the load applied to the main operating portion 24 becomes large, and the tip portion is easily worn. However, in the present invention, the sub operation unit 2
5 is provided, and in the vicinity of the maximum discharge amount position, the sub operation unit 25
A tooth-shaped projection 42 that projects onto the upper surface of the disc cap 40.
Since it is configured to be engaged with and to apply a pressing force to it, the load on the main operating portion 24 is reduced, wear of the tip portion of the main operating portion 24 can be prevented, and the disc cap 40 The advantage is that the pressing force can be reliably exerted. Since the sub-operation portion 25 has a short length, it has a large strength, and therefore, the disc cap 40 can be moved with a strong force, and the sub-operation portion 25 is excellent in the ability to hold it at the maximum ejection amount position.

By the way, in the present invention, the lever shaft 20
Of the main operating portion 24 of the disk cap 40 in contact with the rack groove 41 of the main operating portion 24 and the tooth-shaped projection 4 of the sub operating portion
The surfaces in contact with 2 are each formed as an involute curved surface. As a result, the main operating portion 24 and the rack groove 41, the sub operating portion 25, and the tooth-shaped projection 42 come into line contact with each other, and the pin 25
The above line contact state is maintained even when the lever shaft 20 is rotated around. For this reason, the operating force by the rotation of the lever shaft 20 is efficiently converted into the horizontal moving force of the disc cap 40 and the movable disc valve body 50 integrated with the disc cap 40, and the disc cap 40 and the movable disc valve body 50.
Do not pry up or press down. Therefore, the smooth horizontal movement of the movable disc valve body 50 is guaranteed.

Further, by adopting the involute curved surface, the portions where the main operating portion 24 and the rack groove 41 and the auxiliary operating portion 25 and the tooth-shaped projection 42 make line contact with each other continuously change. That is, the contact points are not concentrated on a specific part, and therefore, local wear does not occur. Therefore, there is no possibility of causing rattling of the handle lever 4 due to local abrasion as in the conventional case.

Even if the curved surface of the main operating portion 24 of the lever shaft 20 is formed into a cycloid curved surface, the same effect as described above can be obtained.

As in the conventional case, the temperature of the mixed hot water can be adjusted by rotating the handle lever 4. This is because the handle lever 4 is rotated to rotate the lever shaft 2.
When 0 is rotated, the rotary shaft 30 is rotated within the upper opening 71 of the case 70, so that the disc cap 40 and the movable disc valve body 50, which are engaged with the rotary shaft 30, are also rotated. Then, the area ratio of the hot water inflow port 61 and the water inflow port 62 of the fixed disk valve body 60 that overlaps with the mixing chamber formed by the disk cap 40 and the movable disk valve body 50 changes, so that the mixing ratio of the hot and cold water also changes. To do. In this way, the temperature of the mixed hot water can be adjusted.

By the way, in this embodiment, the rotary shaft 30 and the disc cap 40 are connected to each other by the former slide grooves 32a, 32.
a and the convex ridges 44, 44 of the latter are brought into contact with each other to obtain an engaged state. Further, the disc cap 40 and the movable disc valve body 50, and the former convex portion 46 in the upper surface side opening 52 of the latter. They are integrated by fitting through packing 95 or the like. That is, the rotary shaft 30, the disc cap 40,
A gap in the rotating direction between the movable disc valve bodies 50 is eliminated. That is, when the handle lever 4 is rotated, there is almost no play, so that the operation feeling is very good.

The embodiment of the present invention can be applied in various ways other than the above. First, the application target of the present invention is not limited to a hot and cold water mixing faucet, but any single lever type faucet having a structure using a disc type valve body can be applied.

With respect to the lever shaft 20, the sub operation portion may be omitted depending on the structural conditions. Also,
The main operating portion 24 and the sub operating portion 25 may be provided with reinforcing ribs 26 as illustrated in FIG. However,
In this case, it is desirable to form a groove or the like capable of accommodating the rib 26 at a position corresponding to the rib 26 of the lever shaft 20 on each of the rotary shaft 30 and the disc cap 40.

A boss portion 23 formed on the side surface of the lever shaft 20.
Also, as illustrated in FIG. 14, not only one side surface but also both front and back surfaces may be formed (FIG. (A)). In this case, the diameter of each boss portion 23a, 23b may be changed on the front and back surfaces (FIG. (B)), or one of the boss portions 23 has a two-stage configuration 2
By setting 3c, it is possible to prevent the mounting posture of the lever shaft 20 from being reversed. Further, as shown in FIG. 15, instead of the boss portion around the opening of the pin hole 22 of the lever shaft 20, bulging portions 27, 27 having an arcuate or semicircular cross section are formed on two side surfaces parallel to the pin hole 22. A structure is provided in which, in addition to being provided, a receiving seat 36a having a curved surface corresponding to this is also formed in the insertion hole 36 of the rotary shaft 30, and as shown in FIG.
While forming a groove 28 that is continuous from the upper end to the middle on the side surface of the locking shaft 36, the locking protrusion 36b
An engaging structure in which the concavo-convex relationship of projecting is reversed is also conceivable.

In addition, the embodiment of the present invention does not prevent appropriate modification depending on the situation.

[0040]

According to the present invention, the pressing force acting surface of the operating portion provided on the lever shaft of the valve body operating mechanism is formed as the involute curved surface or the cycloid curved surface, so that the pressed member such as the disk cap is Since the pressing force is always applied in the line contact state, the circular arc movement of the lever shaft is efficiently converted into the plane movement of the movable disc valve body. Therefore, since the movable disc valve body is not pushed up or pressed and the movable disc valve body does not move up and down, the operability of the handle lever is extremely good.

Further, since the pressing force acting surface of the operating portion provided on the lever shaft maintains the line contact state with the pressed surface, the progress of wear is suppressed. Moreover, since the contact parts do not concentrate on a specific part, local abrasion does not occur.

[Brief description of drawings]

FIG. 1 is a partially sectional side view showing an embodiment of the water faucet of the present invention.

FIG. 2 is an exploded side view showing a partial cross section of main constituent members of the valve body operating mechanism of the water faucet of the present invention.

FIG. 3 is an exploded rear view showing a partial cross-section of main constituent members of the valve body operating mechanism of the water faucet of the present invention.

FIG. 4 is a side sectional view of the valve body operating mechanism of the water faucet of the present invention, showing the valve closed state.

FIG. 5 is a side cross-sectional view of the valve body operating mechanism of the water faucet of the present invention, showing the maximum discharge amount state.

FIG. 6 is a cross-sectional view of the rotating shaft used in the water faucet of the present invention taken along line (a)-(a) in FIG.

FIG. 7 shows a disc cap used in the water faucet of the present invention, (a) is a top view, (b) is a side view,
(C) is a bottom view.

8A and 8B show a movable disc valve body used in the water faucet of the present invention, wherein FIG. 8A is a top view and FIG. 8B is a cross-sectional view taken along line (B)-(B) of FIG. The figure and (c) are bottom views.

9A and 9B are views showing a fixed disc valve body used in the water faucet of the present invention, wherein FIG. 9A is a top view and FIG. 9B is a cross-sectional view taken along the line C-C in FIG. The figure and (c) are bottom views.

FIG. 10 is a view showing a case used for the water faucet of the present invention, in which (a) is a view seen from the bottom side and (b) is a sectional view taken along line (d)-(d) of FIG. FIG.

FIG. 11 shows a back cover used in the water faucet of the present invention, (a) is a top view, (b) is (e) of FIG.
The figure which carried out sectional view in the (e) line, (c) is a bottom view.

FIG. 12 is a view of the case where the rotary shaft is attached to the case as seen from the bottom side, showing two states in which the rotatable range of the rotary shaft is restricted by the guides of the case.

13A and 13B show an embodiment in which a rib is provided on the tip end portion of the lever shaft, wherein FIG. 13A is a side view and FIG. 13B is a rear view.

FIG. 14 shows various modified examples of the structure of the boss portion formed around the pin hole of the lever shaft, in which a side view and a cross-sectional view from the back side are arranged side by side.

FIG. 15 is a side view showing a different embodiment relating to the fitting structure between the lever shaft and the rotary shaft, wherein the rotary shaft is only a cross-sectional view showing the main part.

16A and 16B are views showing still another embodiment regarding the fitting structure of the lever shaft and the rotating shaft, wherein FIG. 16A is a side view of the lever shaft, FIG. 16B is a rear sectional view of the lever shaft, and FIG. FIG. 6 is a plan view showing a state in which the lever shaft is inserted and attached to a rotary shaft, with only the lever shaft being cross-sectionally shown.

FIG. 17 is a front view showing a conventional faucet with a partial cross section.

FIG. 18 is a side sectional view of a conventional faucet.

FIG. 19 is an exploded perspective view showing a valve body operating mechanism of a conventional water faucet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Faucet of the present invention 2 Faucet body 3 Discharge part 4 Handle lever 10 Valve body operating mechanism 20 Lever shaft 21 Main body part 22 Pin hole 23 Boss part 24 Main operating part 25 Sub operating part 26 Rib 30 Rotating shaft 33 Pin insertion hole 34 Recess 36 Insertion hole 40 Disc cap 41 Rack groove 42 Toothed protrusion 50 Movable disc valve body 51 Opening 60 Fixed disc valve body 70 Case 71 Upper opening 74 Annular groove 80 Back cover

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kuniaki Sakakibara 5-1-1, Koiemotocho, Tokoname City, Aichi Prefecture Inax Co., Ltd.

Claims (3)

[Claims] 1. A communication between the inflow port and the outflow port and control of an opening area of each port by sliding on the upper surface of the fixed disk valve body having an inflow port and an outflow port. A movable disc valve body for carrying out the above-mentioned operation, and a lever shaft for pivotally supporting a lever shaft for giving a pressing force for moving the movable disc valve body is provided on the lever shaft. A valve body operating mechanism for a single-lever faucet, characterized in that a pressing force acting surface of an operating portion for applying a pressing force is formed on an involute curved surface or a cycloid curved surface. 2. An upper surface of a fixed disk valve body having an inflow port and an outflow boat is slid on the upper surface of the fixed disk valve body so that the inflow port and the outflow port communicate with each other and the opening area of each port is controlled. In a valve body operating mechanism, in which a movable disc valve body for carrying out the above is placed, and a lever shaft for giving a pushing force for moving the movable disc valve body is pivotably supported, The part to be actuated is composed of a main operating part and a sub operating part formed in a bifurcated shape, and the main operating part is set so that its axis is inclined with respect to the axis of the lever shaft main body. A valve body operating mechanism for a single-lever faucet, wherein a pressing force acting surface of the portion is formed as an involute curved surface or a cycloid curved surface. 3. A reinforcing rib is formed on or near the pressing force acting surface of the operating portion provided on the lever shaft, and the rib is in contact with a pressed surface corresponding to the pressing force acting surface of the operating portion. The valve body operating mechanism of the single lever type water faucet according to claim 1 or 2, which is set so as not to operate.