JP3972113B1 - Ratchet mechanism for water purifier switching valve - Google Patents

Abstract

In a ratchet mechanism for a water purifier switching valve according to the prior art, at low or high temperatures, problems occur due to temperature characteristics in the bending properties of the arm portion of a rack (rotating claw) made of synthetic resin. To solve the problem that mislatch occurs.
A click spring (reverse rotation prevention claw) 21, a rack (rotation hook claw) 22 coupled to a switching lever 50, and a reverse rotation prevention in which a claw portion of the click spring 21 can be hooked and slid on one end face. A ratchet comprising a drive gear 20 having a tooth 25 and a forward rotation latching tooth 26 on which the plurality of claws 27 of the rack 22 can be latched and slid on the other end face, a switching lever return spring 23 and a spring latch plate 24. The mechanism.
[Selection] Figure 2

Description

  The present invention is a water purifier that purifies the tap water (raw water) with a water purification tank cartridge made of a filtering material such as activated carbon (adsorbent) or a hollow fiber membrane filter (usually by switching the switching lever, straight raw water discharge / shower raw water discharge / 3 types of water discharge mode can be switched.) More specifically, improvement of the ratchet mechanism of the water purifier switching valve that can be switched easily and reliably with a small operating force by one-touch operation of the switching lever. About.

  In a water purifier switching valve having a conventional ratchet mechanism, for example, as disclosed in Patent Document 1, a switching valve disposed between a water faucet and a water purifier, and a raw water inlet that can be connected to the faucet, raw water Each raw water outlet and the raw water outlet that can be connected to the water purifier are opened and closed by balls arranged in the respective water passages. The ball shaft is selectively moved by using a rotation shaft that is rotated by a rotation operation of a switching lever inside the water purifier switching valve body, thereby the axial direction of the rotation shaft. A water channel switching mechanism that opens and closes the water channels arranged in parallel to each other and switches the water channels, and the water channel switching mechanism is in a rotation transmission portion by a switching lever, and the switching lever is in an original position. A rotating shaft that rotates 60 ° in the same direction by a single operation of the switching lever, and a ball that is provided on the rotating shaft and is disposed on the ball valve, by a ratchet mechanism that is arranged together with the switching lever restoring mechanism. An arm for moving, this arm is provided with another arm that is axially symmetric with respect to one arm, and another arm that is shifted in phase in the longitudinal direction of the rotating shaft, A switching valve is known in which the water channel is sequentially switched each time the switching lever is pushed down.

With respect to the ratchet mechanism and the switching lever restoring mechanism disposed in the rotation transmission portion by the switching lever in the conventional water purifier switching valve shown in Patent Document 1, refer to FIGS. 7 to 8 of Patent Document 1 in detail. Explained.
In paragraphs 0016 to 0019 of the specification of Patent Document 1, “FIG. 7 is an exploded perspective view of the configuration of the rotation transmission portion by the switching lever 22, and FIG. 8 is a front view of the ratchet mechanism portion.
In FIG. 7, a switching lever restoring mechanism including a ratchet mechanism 38 including a ratchet wheel 38, a rotation hooking claw 39, a return spring 40, a stopper 41, and a spring receiver 42 is arranged on the axis of the rotating shaft 30 with an arm. The ratchet mechanism and the switching lever restoring mechanism are operated in conjunction with the turning operation by the switching lever 22 and the rotating shaft 30 with the arm is rotated.
When the switch lever 22 is pushed downward by 60 °, the rotary hook 39 rotates. At this time, the hook of the rotary hook 39 engages with the teeth of the ratchet wheel 38 and rotates the ratchet wheel 38 and the arm-equipped rotary shaft 30. Let
When the state where the switching lever 22 is pushed down by 60 ° is released, the switching lever 22 returns to the original position by the reaction force of the return spring 40 restricted by the spring receiver 42 together with the rotary hook 39.
The return position of the switching lever 22 is set by a stopper 41 protruding from the outer periphery of the rotation transmission portion at the base of the switching lever 22 and a stopper 41 protruding from the outer wall of the water purifier switching valve body 21, preferably switching The switching lever 22 is set to a position 45 ° above the horizontal position of the lever 22.
When the switching lever 22 and the rotary hook 39 return to their original positions, the ratchet wheel 38 also tries to rotate in reverse, but the hook of the rotary hook 39 is thin and flexible as shown in FIG. As a result, the ratchet wheel 38 stays at the position without rotating in reverse with the switching lever 22 and the rotating hook 39, and the rotating hook 39 rotating in reverse rotates the next switching lever 22 downward by 60 °. To the next tooth of the ratchet wheel 38.
The above-described one-time turning operation of the switching lever is performed as one water channel switching operation unit, and each time the switching lever is pushed downward from a predetermined position set in advance, the rotating shaft 30 with the arm of the water channel switching mechanism is in the same direction. The water channel is sequentially switched by rotating 60 degrees at a time. "(The reference numeral is shown in Patent Document 1 and is different from the specification of the present invention).

Japanese Patent No. 3821446

  However, in the conventional ratchet mechanism for a water purifier switching valve, since the ratchet mechanism is provided directly on the rotating shaft with cam (camshaft), the rotation of the rotating shaft with arm that responds to the operation of the switching lever It can be said that it depends on the bending (spring) property of the hooking nail portion, and at a low temperature (for example, 0 degrees) or a high temperature (for example, 35 degrees), for example, a rotation made of a synthetic resin such as POM resin. Failure due to temperature characteristics (for example, the synthetic resin becomes hard and the movement becomes awkward (heavy). Cracks and breaks due to stress) occur in the bending (spring) property of the hanging claw. Often mislatched (for example, the ratchet mechanism slips or idles, so the water discharge mode cannot be switched. The switch lever is heavy and does not rotate. There.) Has been left behind is a problem that occurs.

  The present invention has been made in view of the above-described problems of the prior art, and its object is to switch between three water discharge modes such as straight raw water discharge / shower raw water discharge / purified water discharge. It is an object of the present invention to provide a ratchet mechanism for a water purifier switching valve that can be switched very easily and reliably by a one-touch operation of a lever and with a small operating force.

  In order to achieve the above object, the water purifier switching valve ratchet mechanism of the present invention has a water purifier switching valve main body upper cover (for example, synthetic resin such as ABS resin) and a driven gear that meshes with the following drive gear. A soft elastic member such as a camshaft having three cams (for example, a synthetic resin such as POM resin) and a valve body (for example, nitrile rubber, silicon rubber, fluororubber, etc.) provided on three links responsive to the camshaft. A water purifier switching valve body having an O-ring), a valve seat opened and closed by the valve body, a plurality of flow conduits communicating from the valve seat, and a drive gear shaft; A switch lever (for example, synthetic resin such as ABS resin) that operates in one direction and reciprocates so that it returns to its original position after operation and switches between three water discharge modes of straight raw water discharge / shower raw water discharge / purified water discharge And a water purifier switching valve main body lower cover (for example, a synthetic resin such as ABS resin) having a plurality of water outlets coupled to a plurality of flow pipes of the water purifier switching valve main body. , A click spring (reverse rotation prevention claw, for example, stainless steel plate), a rack (rotation claw, for example, synthetic resin such as POM resin) coupled to the switching lever, and a drive gear shaft. A drive gear (for example, ABS resin or the like) having a reverse rotation preventing tooth on which the claw portion of the click spring can be hooked and slid on the end face and a forward rotation hook tooth on which the plural claws of the rack can be hooked and slid on the other end face ), A switching lever return spring (for example, stainless steel wire), and a spring hanging plate (40-degree rotation limiting plate for the switching lever. For example, a stainless steel plate. )When Characterized in that it consists of.

  In the ratchet mechanism for the water purifier switching valve of the present invention, there is no problem due to the temperature characteristics of the rack (rotating hook) even at low temperatures (for example, 0 degrees) or at high temperatures (for example, 35 degrees). Therefore, there is an effect of reducing the occurrence of mis-latch (for example, the ratchet mechanism slips and the water discharge mode cannot be switched. The switching lever does not return).

  As with conventional models, the switch lever that switches between three water discharge modes, such as straight raw water discharge / shower raw water discharge / purified water discharge, can be easily and reliably switched with a single-touch operation. Realized without.

FIG. 1 is a perspective view of a water purifier 90 directly connected to a water tap having a ratchet mechanism for the water purifier switching valve 10 of the present invention. FIG. 2 is an isometric view showing the components of the ratchet mechanism of the water purifier switching valve 10 of the present invention. FIG. 3A is a perspective view of the camshaft 30, and FIG. 3B is a front view of the camshaft 30. FIG. 4 is a right side view of the link 40 (the same is true for the left side view). FIG. 5 is a perspective view in which the link 40 is disposed on the camshaft 30. FIG. 6 is a front sectional view of an essential part of the water purifier switching valve 10 according to the present invention when the camshaft 30 is cut as a center. FIG. 7 is an isometric view showing the main components of a water faucet directly connected water purifier 90 having a ratchet mechanism of the water purifier switching valve 10 of the present invention.
In addition, in each document including the present specification, since a plurality of parts (or names) are used at the same time, the T symbol is used for the parts related to the straight raw water discharge so that it can be easily identified. Symbols S are added to parts related to raw water discharge, and symbols J are added to parts related to clean water discharge.

With reference to FIG. 1 thru | or FIG. 7, the structure (hardware) of the water faucet direct connection type water purifier 90 which has the ratchet mechanism of the switching valve 10 for water purifiers of this invention is demonstrated.
A water purification tank cartridge 80 coupled to the water purifier 90 shown in FIG. 1 is a part that is detachably coupled to the outside of the water purifier switching valve body 10 and includes a casing (for example, a synthetic resin such as ABS resin) 81 and the casing. 81 and a filter medium (not shown; for example, activated carbon, hollow fiber membrane filter).
Although not shown, the casing 81 has a purified water outlet (downstream side) and a raw water supply inlet (upstream side) outside the casing 81.
In general, the purpose of the water purification tank cartridge 80 is to purify the tap water (raw water) by flowing through, but in order to add minerals to the purified water (purified water), mineral additives and the like are also added to the filter medium. In some cases.
And the filter medium has the limit (life) in the ability to purify, and it is necessary to exchange and use the water purification tank cartridge 80 regularly.

As shown in FIG. 1 or 7, the water purifier switching valve main body upper cover (for example, synthetic resin such as ABS resin) 70 penetrates the inlet 11 of the water purifier switching valve main body 10, and the water purifier switching valve The upper part of the main body 10 is covered.
The water purifier switching valve main body upper cover 70 is provided with a water discharge mode display window 71 so as to know which water discharge mode is currently selected from the three water discharge modes of straight raw water discharge / shower raw water discharge / purified water discharge. Yes.

  As shown in FIG. 6 or FIG. 7, the water purifier switching valve body (for example, synthetic resin such as POM resin) 10 has an inlet 11 into which raw water (tap water) flows from a water tap and a camshaft 30 inserted therein. The camshaft bearing hole 12 for bearing one end 31 of the camshaft 30 and the other end (upstream side) are the valve seat T13a (the end surface is slightly tapered so as not to damage the O-ring T44a that abuts). An end (downstream side) of the flow pipe T13 that is an opening 13b that communicates with the straight water discharge port 76 of the water purifier switching valve main body lower cover 75, and one end (upstream side) of the valve seat S14a (the end surface is in contact with the O-ring) S44b is slightly tapered so as not to be damaged), and the other end (downstream side) is a flow line S1 which is an opening 14b that leads to the raw water discharge port 77 of the water purifier switching valve main body lower cover 75. One end (upstream side) of the valve seat J15a (the end surface is slightly tapered so that the abutting O-ring J44c is not damaged), and the other end (downstream side) is the raw water supply of the water purification tank cartridge 80 A distribution pipe J15 that is a raw water supply outlet 15b coupled to the inlet 84, a drive gear shaft 19 on the outer periphery, and one end (small recess) 51 of the switching lever 50 on the opposite side of the axis of the drive gear shaft 19 are provided. And a support shaft (convex portion) 59 that is rotatably engaged.

Usually, water faucet fixing parts are arranged on the upstream side of the inflow port 11. (With water faucet fixing parts, the industry has established uniform standards and sells general-purpose water supply parts. Use them as much as possible to improve maintainability.)
As shown in FIG. 1 or FIG. 7, in the water purifier switching valve body 10 of the present invention, a commercially available filter (not shown; for example, about 60 mesh) is used to prevent contamination by foreign substances (for example, insects, sand, iron scraps, etc.). , Polyester net, nylon net, synthetic resin net with antibacterial metal, stainless steel net, copper net, copper silver alloy net, aluminum net, antibacterial metal net, non-woven net, antibacterial metal Non-woven mesh, etc. In addition, antibacterial metals include silver, copper, etc., and any processing methods such as attachment, addition, inclusion, coating, plating, vapor deposition, etc.) and commercially available watertight packing 72 (for example, donuts) Thick rubber plate), a commercially available faucet fixing part 73 (for example, a 16 mm diameter C ring plate made of POM resin), and a rotating ring 74 (for example, POM resin or the like) that can be screwed into the threaded inlet 11 Together Using the resin), and the like.

As shown in FIG. 1 or FIG. 7, the water purifier switching valve body 10 is externally moved in one direction up and down by fingers and reciprocated so as to be restored to the original position after the operation. A switching lever (for example, synthetic resin such as ABS resin) 50 for switching three water discharging modes (the switching order is determined by design) of raw water discharging / purified water discharging is disposed.
The switching lever 50 is substantially U-shaped, and one end (small concave portion) 51 is rotatably engaged with a support shaft (convex portion) 59 of the water purifier switching valve body 10 and the other end (large concave portion, groove). Hole) 52 is engaged (directly connected) with the rack 22 (projection).

As shown in FIG. 2 or 7, the drive gear shaft 19 of the water purifier switching valve body 10 has a drive gear that rotates in one direction (for example, synthetic resin such as ABS resin, one reciprocating movement of the switching lever 50. ) 20 is pivotally mounted.
In the drive gear shaft 19, for example, characters of raw water / shower / purified water are provided on the outer peripheral portion so that it can be understood which of the three water discharge modes is currently selected, ie, straight raw water spouting / shower raw water spouting / purified water spouting. The gear 56 of the display drum 55 displayed on is engaged. The display drum 55 rotates in the reverse direction to the drive gear 20. The characters displayed on the display drum 55 are visible from the water discharge mode display window 71 of the water purifier switching valve main body upper cover 70.

In the ratchet mechanism (including the switching lever restoring mechanism), the click spring (reverse rotation preventing claw, for example, stainless steel plate) 21 and the rack (rotating hook claw, the switching switching lever 50 are directly connected. For example, POM. (Synthetic resin such as resin) 22, a reverse rotation preventing tooth 25 on which the claw portion of the click spring 21 can be hooked and slid on one end surface, and a forward rotation on which the plural claws 27 of the rack 22 can be hooked and slid on the other end surface A drive gear 20 having a latching tooth 26, a switching lever return spring (for example, stainless steel wire) 23, and a spring hanging plate (40-degree rotation limiting plate for the switching lever 50, for example, stainless steel plate) 24. Composed of things.
One end of the switching lever return spring 23 is hooked on the recess 28 of the rack 22, and the other end is hooked on the spring hook plate 24.
When the switching lever 50 is pushed downward with fingers, the rack 22 rotates in one direction in conjunction with it, but stops at a position where the switching lever 50 rotates 40 degrees due to the spring hook plate 24. Since the plurality of claws 27 of the rack 22 are hooked on the positive rotation latching teeth 26 provided on the drive gear 20, the drive gear 20 also rotates while pushing up the click spring 21 in conjunction with the rotation of the rack 22, A biasing (repulsive) force is applied to the switching lever return spring 23.
Here, when the finger is released from the switching lever 50, the switching lever 50 is restored upward by the urging (repulsive) force of the switching lever return spring 23. The rack 22 rotates in the other direction in conjunction with each other, but the claw portion of the click spring 21 is hooked on the reverse rotation prevention tooth 25 of the drive gear 20 to suppress the rotation in the other direction. Slides on a positive rotation latch 26 provided on the drive gear 20, and the drive gear 20 remains stopped in place.
Thus, in the ratchet mechanism of the water purifier switching valve of the present invention, there is a problem due to the temperature characteristics of the rack (rotating hook) even at low temperatures (for example, 0 degrees) or at high temperatures (for example, 35 degrees). Since it does not occur, the occurrence of mis-latch (for example, the ratchet mechanism slips and the water discharge mode cannot be switched. The switching lever does not return) can be reduced. Further, as in the prior art, the one-touch operation can be easily and reliably switched with a small operating force of the switching lever 50 for switching between three water discharge modes such as straight raw water discharge / shower raw water discharge / purified water discharge.

As shown in FIG. 3, a camshaft (for example, synthetic resin such as POM resin) 30 is engaged with the drive gear 20 on one end 31 side and rotates in the other direction (for example, 40 degrees of the drive gear 20). Rotating motion 60 degrees with respect to the rotational motion) 39, and a cam having two substantially convex portions in an elliptical shape in the axial circumferential direction at a substantially central portion (between the one end portion 31 and the other end portion 32). T33, cam S34, and cam J35 were formed with their phases shifted (for example, 60 degrees and 120 degrees).
As shown in FIG. 6 or FIG. 7, the camshaft 30 is inserted from the camshaft bearing hole 12 of the water purifier switching valve body 10, and the one end 31 is supported by the camshaft bearing hole 12. The one end portion 31 has a packing groove 36, and an O-ring (for example, a soft elastic member such as nitrile rubber, silicon rubber, or fluorine rubber) 37 is provided in the packing groove 36 to be watertight.
When the switching lever 50 is pushed down with a finger, the drive gear 20 is rotated 40 degrees in conjunction with it. Then, the display drum 55 is rotated 120 degrees in conjunction with the drive gear 20. Further, the driven gear 39 is rotated 60 degrees in conjunction with the drive gear 20.
When the reciprocating motion of the switching lever 50 is performed three times, the display drum 55 is rotated once (the characters of raw water / shower / purified water are displayed and returned to the original position), and the drive gear 20 is divided into three minutes. And the driven gear 39 is rotated halfway. That is, when the reciprocating motion of the switching switching lever 50 is performed nine times, the display drum 55 is rotated three times, the driving gear 20 is rotated one time, and the driven gear 39 is rotated one and a half times.

As shown in FIG. 4 to FIG. 5 or FIG. 7, one link (for example, synthetic resin such as POM resin) 40 is provided on the camshaft 30 and is an outer peripheral portion of a cam (cam T33, cam S34, cam J35). The open / close valve main body has a hollow portion 41 formed so as to surround the hollow portion 41, and one protrusion 42 is formed on the hollow portion 41 side.
The link 40 linearly reciprocates in the vertical direction by sliding between the projecting portions of the rotating cams (cam T33, cam S34, and cam J35) and the projections 42.
In the water faucet directly connected water purifier 90 of the present invention, the link T40a corresponding to the cam T33 of the camshaft 30, the link S40b corresponding to the cam S34, and the link J40c corresponding to the cam J35. , Each is arranged to respond.

In addition, a valve body (plug) having a rectifying blade 43 and an O-ring (for example, a soft elastic member such as nitrile rubber, silicon rubber, fluorine rubber) 44 at one end portion (downstream side) of the outer peripheral portion of the link 40. 45) is provided.
The valve body corresponding to the valve seat T13a (upstream side) of the water purifier switching valve body 10 is the valve body T45a (rectifying blade T43a, O-ring T44a), and the valve body corresponding to the valve seat S14a (upstream side) is the valve body. In S45b (rectifying blade S43b, O-ring S44b), the valve body corresponding to the valve seat J15a (upstream side) is a valve body J45c (rectifying blade J43c, O-ring J44c).

A shaft-shaped guide 46 is provided at the other end (upstream side) of the outer periphery of the link 40, and a coil spring (for example, stainless steel wire) 47 is provided at the outer periphery of the guide 46. It has been.
The link T40a corresponds to the guide T46a, the link S40b corresponds to the guide S46b, and the link J40c corresponds to the guide J46c.
As shown in FIGS. 5 to 7, the guides T46a, the guides S46b, and the guides J46c are supported on the upper portions of the guides T46a, S46b, and J46c so that the guides T46a, the guides S46b, and the guides J46c can slide simultaneously. One receptacle (for example, a synthetic resin such as POM resin) 60 is provided.
In the guide receiver 60, the raw water passage port 61, a guide hole 62a into which the guide T46a is inserted, a guide hole 62b into which the guide S46b is inserted, and the guide J46c are inserted at an arbitrary position in a substantially central portion. The guide hole 62c and the recessed part 63 which bears the other end part 32 of the camshaft 30 are provided.
In addition, a filter (not shown), a watertight packing 72, a faucet fixing component 73, and the like are placed on the upper portion (upstream side) of the guide receiver 60.

The effect of the coil spring 47 that constantly urges and urges each of the link T40a, the link S40b, and the link J40c will be described.
Since each of the link T40a, the link S40b, and the link J40c has a repulsive force of the coil spring 47 of, for example, about 1N, the guide receiver 60 receives about half of the stress of about 1N. A stress of about 0.5 N is applied. Further, the guide receiver 60 is subjected to a stress that is about half (1.5 N) of the sum (about 3 N) of the three repulsive forces of the coil spring 47.
In each of the link T40a, the link S40b, and the link J40c, the convex portion of the rotating cam (cam T33, cam S34, cam J35) and the link (link T40a corresponding to the cam T33, link S40b corresponding to the cam S34) , The valve body T45a, the valve body S45b, and the valve body J45c when the projection of the link J40c) corresponding to the cam J35 is not slid on the valve seat T13a and the valve body S45b facing the valve body T45a. The valve seat S14a and the valve seat J15a facing the valve body J45c are reliably closed with a stress of about 0.5 N (valve body and valve seat) at low water pressure (for example, 0.05 to 0.10 MPa). To prevent the raw water from entering the distribution pipe).

Here, for example, a case is assumed in which the convex portion of the cam T33 is in contact with the protrusion of the link T40a corresponding to the cam T33. In other words, the convex portion of the cam S34, the protruding portion of the link S40b corresponding to the cam S34, but not in contact with, also, the convex portion of the cam J35, the protruding portion of the link J 40c corresponding to the cam J35, but This is the case where they are not in contact. The camshaft 30 at this time is only subjected to about 0.5 N of the stress that lifts the link T40a (stress that the link T40a receives by the coil spring 47). (No stress is received from the link S40b and the link J40c.)
When the switching lever 50 is pushed downward with a finger, the drive gear 20 rotates in one direction at a constant angle, and the driven gear 39 interlocked with the drive gear 20 moves in the other direction at a constant angle. When the camshaft 30 rotates at a certain angle by rotating the cam T30, the projection of the cam T33 and the protrusion of the link T40a corresponding to the cam T33 slide down to lower the link T40a. , for example, pushes the convex portion of the cam S34, the protruding portion of the link S 40b corresponding to the cam S34, the link S 40b but in contact with the sliding.
Explaining mechanically, the camshaft 30 is originally rotated with a force proportional to the force that pushes the switching lever 50 downward with fingers, but when the link T40a is lowered, the stress (about approximately) applied to the link T40a. 0.5N) is also added to rotate the cam T33 (camshaft 30). Further, the link S 40b corresponding to the cam S34 is pushed up by the rotating added stress. In other words, because of the lever principle, the force that pushes the switching lever 50 downward with fingers does not require the force to push up the link (about 0.5 N), so the camshaft 30 with no load is rotated. This means that it is only necessary to have the equivalent power. This is the effect of the coil spring 47.
Due to the effect of the coil spring 47, it is possible to switch easily and surely by a one-touch operation with a small operating force of the switching lever 50 for switching between three water discharge modes such as straight raw water discharge / shower raw water discharge / purified water discharge. It is something that can be done.

As shown in FIG. 6 or FIG. 7, the water purifier switching valve main body lower cover (for example, synthetic resin such as ABS resin) 75 is coupled to the opening 13b of the flow pipe T13 of the water purifier switching valve main body 10. The straight raw water outlet 76, the shower raw water outlet 77 coupled to the opening 14 b of the flow pipe S 14 of the water purifier switching valve body 10, and a switching lever stopper 78 are provided.
The water purifier switching valve main body lower cover 75 has the straight raw water outlet 76 at the opening 13b (downstream side) of the flow conduit T13 of the water purifier switching valve main body 10, and the flow pipe of the water purifier switching valve main body 10. The lower portion of the water purifier switching valve main body 10 is covered while the shower raw water outlet 77 is coupled to the opening 14b (downstream side) of the path S14.
The switching lever stopper 78 is a rotation stopper when the switching lever 50 is pushed downward with a finger. For example, when the switching lever 50 is pushed downward with a thumb, the switching lever stopper 78 is switched with a finger other than the thumb. If the switching lever 50 is pushed downward so as to support the back surface of the lever topper 78, the force of the thumb can be easily applied.
The water purifier switching valve main body upper cover 70 and the water purifier switching valve main body lower cover 75 are assembled by sandwiching the water purifier switching valve main body 10 therebetween. At the same time, one end (small concave portion) 51 of the switching lever 50 remains pivotable and cannot be attached or detached.

The operation (software) of the water purifier 90 directly connected to the water tap will be described.
Although part of the reference numerals are omitted in FIG. 6, the rectifying blade T43a of the valve body T45a is inserted into the valve seat T13a. The straightening blade S43b of the valve body S45b is inserted into the valve seat S14a. The straightening blade J43c of the valve body J45c is inserted into the valve seat J15a.
The O-ring T44a of the valve body T45a is disposed so as to press and close the valve seat T13a. The O-ring S44b of the valve body S45b is disposed so as to press and close the valve seat S14a. The O-ring J44c of the valve body J45c is disposed so as to press and close the valve seat J15a.
The drive gear 20 rotates in one direction at a constant angle by one reciprocating motion of the switching lever 50 with the fingers, and the driven gear 39 interlocked with the drive gear 20 rotates in the other direction at a constant angle. As a result, the cam shaft 30 rotates at a constant angle, and any one of the convex portions of the cam T33, the cam S34, and the cam J35 corresponds to the link T40a, the link S40b, and the link J40c. Any one of the link T40a, the link S40b, and the link J40c is reciprocated in the vertical direction by sliding with the protruding portion. Accordingly, the corresponding valve body T45a opens or closes the valve seat T13a, the valve body S45b opens or closes the valve seat S14a, and the valve body J45c opens or closes the valve seat J15a. Operate.
The raw water in the water purifier switching valve body 10 passes through either the flow line T13, the flow line S14 or the flow line J15, and the straight raw water outlet 76 of the water purifier switch valve main body lower cover 75, or Water is passed through either the shower raw water outlet 77 of the water purifier switching valve main body lower cover 75 or the purified water outlet 82 (not shown) of the water purification tank cartridge 80.
Then, by repeating one up and down reciprocation by the finger of the switching lever 50, the three water discharge modes of the straight raw water spouting / shower raw water spouting / purified water spouting are switched one after another and discharged.

  As mentioned above, although various combinations etc. were described about the preferred embodiment of this invention, this invention is not limited to embodiment mentioned above, Many combinations and modification | change are within the range which does not deviate from the mind of invention. Of course, etc. can be given.

  The ratchet mechanism of the water purifier switching valve 10 of the present invention can be applied not only to a water purifier but also to a mineral water generator, an alkali ion water conditioner, and the like.

It is a perspective view of the water faucet direct connection type water purifier which has the ratchet mechanism of the switching valve for water purifiers of this invention. It is an isometric view showing the components of the ratchet mechanism of the water purifier switching valve of the present invention. It is the perspective view and front view of a cam shaft. It is a right view of a link. It is the perspective view which has arrange | positioned the link to a cam shaft. It is principal part front sectional drawing of the switching valve for water purifiers of this invention when cut centering on a camshaft. It is an isometric view showing the main components of the water tap direct connection type water purifier which has the ratchet mechanism of the switching valve for water purifiers of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Switch valve body for water purifiers, 11 ... Inlet, 12 ... Camshaft bearing hole, 13 ... Flow pipe T, 13a ... Valve seat T, 13b ... Opening part, 14 ... Flow pipe S, 14a ... Valve seat S , 14b ... opening, 15 ... flow pipe J, 15a ... valve seat J, 15b ... raw water supply outlet, 19 ... drive gear shaft, 20 ... drive gear, 21 ... click spring (reverse rotation prevention claw), 22 ... rack (Rotating hook), 23 ... switching lever return spring, 24 ... spring hook plate (rotation limiting plate), 25 ... reverse rotation prevention tooth, 26 ... forward rotation hooking tooth, 27 ... rack claw, 28 ... recess, 29 ... Projection, 30 ... cam shaft, 31 ... one end, 32 ... other end, 33 ... cam T, 34 ... cam S, 35 ... cam J, 36 ... packing groove, 37 ... O-ring, 39 ... driven gear, 40 (40a, 40b, 40c) ... link, 41 (41a, 41b, 41c) ... Empty part, 42 (42a, 42b, 42c) ... Projection part, 43 (43a, 43b, 43c) ... Rectifier vane, 44 (44a, 44b, 44c) ... O-ring, 45 (45a, 45b, 45c) ... Valve body (Plug), 46 (46a, 46b, 46c) ... shaft-shaped guide, 47 ... coil spring, 50 ... switch lever, 51 ... one end (small recess), 52 ... other end (large recess), 55 ... display drum, 56 ... Gear, 59 ... Support shaft (convex part), 60 ... Guide receiver, 61 ... Raw water passage port, 62 (62a, 62b, 62c) ... Guide hole, 63 ... Recess part, 70 ... Water purifier switching valve main body upper cover, 71 ... Water discharge mode display window, 72 ... Watertight packing, 73 ... Faucet fixing part, 74 ... Rotating ring, 75 ... Water purifier switching valve body lower cover, 76 ... Straight raw water discharge port, 77 ... Shower raw water discharge port, 78 ... Off Lever stopper, 80 ... water purification tank cartridge, 81 ... casing, 90 ... water faucet type water purifier

Claims (1)

  A water purifier switching valve body upper cover, a camshaft having a driven gear that meshes with the following drive gear, a valve body provided on three links that respond to the camshaft, and a valve body that is opened and closed by the valve body A water purifier switching valve body having a valve seat, a plurality of flow pipes communicating from the valve seat, and a drive gear shaft, and the water purifier switching valve body is provided outside the water purifier switching valve body and operates in one direction up and down to the original position after the operation. A switching lever that reciprocates so as to restore and switches between three water discharge modes of straight raw water discharge / shower raw water discharge / purified water discharge, and a plurality of water discharge ports coupled to a plurality of flow pipes of the water purifier switching valve body A water purifier switching valve comprising: a click spring; a rack coupled to the switching lever; and a claw portion of the click spring mounted on one end face of the drive gear shaft. Hanging It comprises a drive gear having a reverse rotation preventing tooth that can slide and a forward rotation latching tooth on which the plurality of claws of the rack can be latched and slid on the other end surface, a switching lever return spring, and a spring hanging plate. A ratchet mechanism for a water purifier switching valve.

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