JP6810900B2 - shower head - Google Patents

Description

The present invention relates to a shower head, and more particularly to a shower head having a flow path switching function.

A shower head having a flow path switching function usually includes one disc member (also referred to as a water diversion board) and a drive mechanism that rotates the disc member to realize flow path switching. Due to the difference in the operation method, as the drive mechanism, a drive mechanism that uses the operation of pressing a button, a drive mechanism that uses the operation of rotating the surface lid, a drive mechanism that uses the swing operation, and the like have been developed.

In the shower head described in Patent Document 1, the area that receives water pressure on the upper surface side of the diversion board (disk member) and the area that receives water pressure on the lower surface side of the diversion board are approximately the same, and the water pressure on the upper surface side of the diversion board is made approximately the same. By making the acting force of the water diversion board and the acting force of the water pressure on the lower surface side of the diversion board almost the same, the rotational force of the diversion board is lightened and the operability is improved.

Japanese Unexamined Patent Publication No. 2016-140767

When the disc member is slid to switch the flow path in this way, it is common practice to apply grease in order to improve the slidability. However, there have been problems such as the operating force of the switching operation varies depending on the amount of grease applied, the grease gradually decreases due to the outflow, and the operating force of the switching operation may increase after long-term use.

The present invention has been made based on the above findings. An object of the present invention is to provide a shower head capable of realizing a remarkable and stable reduction in the operating force of a flow path switching operation.

The present invention is a shower head having a flow path for guiding water to a plurality of spouts, and the plurality of main valves supported so as to be displaceable in the flow path, and each of the plurality of main valves. On the other hand, it is adjacent to the upstream side of the flow path, accommodates water supplied from the upstream side of the flow path, and uses the pressure of the water to urge each of the plurality of main valve bodies in the valve closing direction. A plurality of back pressure chambers, a plurality of pilot holes communicating the downstream side of the flow path and each of the plurality of back pressure chambers, and a pilot valve for selectively controlling the open / closed state of the plurality of pilot holes. The pilot valve includes an operation unit for switching the open / closed state of the plurality of pilot holes by the pilot valve by the operation of the user, and the pilot valve has a plurality of communication holes, and each of the plurality of communication holes has a plurality of communication holes. The shower head is characterized in that the pilot hole of the main valve body is released by selectively communicating with the back pressure chamber outflow hole provided in the back pressure chamber of each main valve body. ..

According to the present invention, since the opening and closing of a plurality of main valves is controlled by switching the opening and closing states of the plurality of pilot holes by the pilot valve, the switching operation can be stably performed for a long period of time without using grease. It is possible to realize a remarkable reduction in operating force.

Further , according to the present invention , it is possible to design the opening / closing control of the pilot holes of a plurality of main valve bodies with a higher degree of freedom, and it is possible to realize a wider variety of switching controls.

Further, a plurality of water discharge modes can be switched , and the storage chamber in which water from the water supply source is stored and the plurality of storage chambers provided on the water discharge surface side of the shower head with respect to the storage chamber. A secondary side flow path member having a plurality of flow paths corresponding to the water discharge mode is further provided, and the plurality of main valve bodies are a plurality of diaphragm valves, and each of the plurality of flow paths and the storage chamber are provided. It is preferable that the communication or interruption with the device is controlled .

According to this, since the communication or blocking of each of the plurality of flow paths and the storage chamber is controlled by the plurality of diaphragm valves, the flow path switching operation can be performed stably for a long period of time without using grease. It is possible to realize a remarkable reduction in the operating force of the.

When the plurality of diaphragm valves are two diaphragm valves, a pilot hole for communicating the back pressure chamber of each diaphragm valve and the space outside the storage chamber is located on the intermediate side of the arrangement of the two diaphragm valves. It is preferable that the area is centrally provided and opened and closed by a common pilot valve.

According to such an arrangement, the shower head can be miniaturized. Further, since the movement range (movement distance) of the pilot valve may be small, the operating force can be further reduced.

Similarly, when the plurality of diaphragm valves are three or more diaphragm valves arranged in an annular shape, the pilot hole for communicating the back pressure chamber of each diaphragm valve with the space outside the storage chamber is the above three. It is preferable that the diaphragm valves are centrally provided in the central region of the arrangement of one or more diaphragm valves, and are opened and closed by a common pilot valve.

Even with such an arrangement, the shower head can be miniaturized. Further, since the movement range (movement distance) of the pilot valve may be small, the operating force can be further reduced.

More preferably, the common pilot valve is configured as a disc member rotatably supported around its own rotation axis and has teeth on its outer circumference.

According to this, the disc member can be easily rotationally driven by utilizing the teeth on the outer peripheral portion of the disc member.

In this case, more preferably, the disc member is made of resin.

According to this, since high smoothness can be easily realized, sliding resistance can be suppressed, and it is not necessary to separately provide a sealing member.

Further, preferably, the disc member has a plurality of communication holes, and each of the plurality of communication holes is provided in the back pressure chamber of each diaphragm valve according to the rotation position of the disc member. The pilot hole of the diaphragm valve is opened by selectively communicating with the back pressure chamber outflow hole.

With such an arrangement, the shower head can be further miniaturized. Further, since the rotation angle (moving distance) of the disc member (pilot valve) may be small, the operating force can be further reduced.

Further, a disc holding member is interposed between the back pressure chamber outflow hole and the disc member, and the disc holding member has an outflow communication passage communicating with the back pressure chamber outflow hole of each diaphragm valve. It is preferable that the disc pressing member is provided so as to press the disc member in a direction away from the back pressure chamber outflow hole by an urging means.

According to such an arrangement, it is not necessary to provide a seal member between the member on the side opposite to the back pressure chamber outflow hole and the disk member.

In this case, more preferably, each outflow communication passage is composed of a tubular portion, and each tubular portion is inserted into the corresponding back pressure chamber outflow hole, and each tubular portion and the back pressure chamber outflow. A gap remains between the hole and the hole, and the gap functions as a back pressure chamber inflow hole.

The gap can be easily formed with high dimensional accuracy. As a result, it is possible to effectively suppress the variation in the characteristics of the back pressure chamber inflow hole between the plurality of diaphragm valves.

Further, the shower head of the present invention is attached to an operation portion to which the user gives an operating force, a rod portion that reciprocates in the axial direction of itself each time the operation portion is operated, and a tip side of the rod portion. A claw member having a claw that engages with the teeth of the disc member is further provided, and the claw pulls in the tooth while the rod portion is moving, so that the disc member is rotated. It is preferable to have.

By applying a force in the pulling direction, it becomes possible to prevent the rod portion from buckling and deforming, and it becomes possible to reduce the rigidity required for the rod portion. As a result, the rod portion can be composed of not only a rigid body but also a plastic body or an elastic body.

In this case, more preferably, the base end of the rod portion is connected to the operation portion, a coil spring is arranged around the rod portion, and the base end of the coil spring is a shower head housing. The tip of the coil spring is fixed to the claw member, the stopper of the claw member is attached to the tip of the rod portion, and the claw member is of the coil spring. By deformation, it can move relative to the rod portion.

According to this, when the claw member after pulling in the tooth returns to the original position in order to engage with the next tooth, the resistance (interference) from the disc member can be effectively avoided.

Further, for example, a plurality of diaphragm valves can be integrated as a single diaphragm member. In this case, it is preferable that the diaphragm member has a seal portion around it. Alternatively, the plurality of diaphragm valves may be formed as independent parts.

In order to stabilize the opening / closing operation of each diaphragm valve, it is preferable that each diaphragm valve is urged in the closing direction by an elastic member.

According to the present invention, since the opening and closing of a plurality of main valves is controlled by switching the opening and closing states of the plurality of pilot holes by the pilot valve, the switching operation can be stably performed for a long period of time without using grease. A remarkable reduction in operating force can be realized. Further, according to the present invention, it is possible to design the opening / closing control of the pilot holes of a plurality of main valve bodies with a higher degree of freedom, and it is possible to realize a wider variety of switching controls.

It is a partial cross-sectional perspective view of the shower head by 1st Embodiment of this invention. It is sectional drawing of the shower head of FIG. It is an exploded perspective view of the shower head by 1st Embodiment of this invention. It is the schematic for demonstrating the opening and closing of a pilot hole. It is the schematic for demonstrating the disk presser member. It is the schematic for demonstrating the state at the time of starting the rotation operation of a disk member. It is the schematic for demonstrating the state in the rotating operation of a disk member. It is the schematic for demonstrating the state at the end of the rotation operation of a disk member. It is a top view of the shower head by 2nd Embodiment of this invention. 9 is a cross-sectional view taken along the line XX of the shower head of FIG. It is an exploded perspective view of the shower head according to the 2nd Embodiment of this invention. It is the schematic for demonstrating the opening and closing of a pilot hole. It is the schematic for demonstrating the disk presser member. It is the schematic for demonstrating the state at the time of starting the rotation operation of a disk member. It is the schematic corresponding to FIG. 13 for demonstrating the modification of the 2nd Embodiment of this invention. It is a partial cross-sectional perspective view of the shower head according to the 3rd Embodiment of this invention. It is sectional drawing of the shower head of FIG. It is an exploded perspective view of the shower head according to the 3rd Embodiment of this invention. It is a perspective view of the shower head according to 4th Embodiment of this invention. It is a front view of the shower head of FIG. It is a cross-sectional view of XXI-XXI of the shower head of FIG. FIG. 21 is a sectional view taken along line XXII-XXII of the shower head of FIG. It is an exploded perspective view of the shower head according to 4th Embodiment of this invention. It is the schematic for demonstrating the opening and closing of a pilot hole. It is the schematic for demonstrating the state at the time of starting the rotation operation of the 1st disk member. It is the schematic for demonstrating the state in the rotating operation of the 1st disk member. It is the schematic for demonstrating the state at the end of the rotation operation of the 1st disk member. It is the schematic for demonstrating the state at the time of starting the rotation operation of the 2nd disc member. It is the schematic for demonstrating the state in the rotating operation of the 2nd disc member. It is the schematic for demonstrating the state at the end of the rotation operation of the 2nd disc member.

[Structure of the first embodiment]
Next, the shower head according to the first embodiment of the present invention will be described with reference to the accompanying drawings. As will be described later, the shower head 1 of the present embodiment is a shower head capable of switching a plurality of water discharge modes (water discharge in a plurality of water discharge modes is possible).

FIG. 1 is a partial cross-sectional perspective view of the shower head 1 according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view of the shower head 1 of the present embodiment, and FIG. 3 is a shower head according to the present embodiment. It is an exploded perspective view of 1.

As shown in FIGS. 1 to 3, the shower head 1 of the present embodiment is a storage chamber 5 (also referred to as a cavity) in which water is supplied and stored from a water supply source (not shown) via water supply members 2 and 3. ) Is provided.

A secondary side flow path member 4 formed by superimposing four substantially disk-shaped element members 40, 47, 48, and 49 is provided on the water discharge surface side of the shower head 1 with respect to the storage chamber 5. There is. The secondary side flow path member 4 has three (plurality of examples) flow paths corresponding to three (plurality of examples) water discharge modes.

Of the secondary side flow path members 4, the element member 40 facing the storage chamber 5 is formed with three valve seats 41 to 43 raised on the storage chamber 5 side, and is formed in the center of each valve seat 41 to 43. Is provided with a communication hole that communicates with the corresponding flow path (see also FIG. 4 described later). The three valve seats 41 to 43 (and the corresponding flow paths) are annularly arranged evenly by 120 degrees in the circumferential direction.

Diaphragm valves 21 to 23 are provided in an annular shape so as to correspond to each of the three valve seats 41 to 43. The three diaphragm valves 21 to 23 are integrally formed as a single component diaphragm member 20, but each of the diaphragm valves 21 to 23 can operate independently.

A seal ring portion 24 is formed on the outer peripheral portion of the diaphragm member 20. The seal ring portion 24 is watertightly sandwiched by the upper edge portion 40a of the element member 40 and the cover member 8. On the other hand, the region on the center side of the diaphragm member 20 is supported on the upper surface of the element member 40 via the space member 38.

Further, each of the diaphragm valves 21 to 23 is provided with coil springs 51 to 53 (an example of an elastic member) between the diaphragm valves 21 to 23 and the lower surface of the cover member 8, and is urged in the closing direction by the coil springs 51 to 53. There is.

Further, the three diaphragm valves 21 to 23 of the present embodiment are arranged in an annular shape, and the back pressure chambers 21b to 23b of the diaphragm valves 21 to 23 and the element member 40 which is an outer space of the storage chamber 5 A pilot hole (partly formed on the lower surface side of the cover member 8 is a back pressure chamber outflow hole 21c to 23c) for communicating with the lower space is on the center side of the arrangement of the three diaphragm valves 21 to 23. It is centrally provided in the area of the above, and is opened and closed by a disk member 10 that functions as a common pilot valve. (When there are two diaphragm valves, the pilot holes for communicating the back pressure chamber of each diaphragm valve and the space below the element member 40, which is the space outside the storage chamber 5, are the two diaphragms. It can be centrally provided in the intermediate area of the valve arrangement.)

The disc member 10 is made of resin, is rotatably supported around its own rotation axis, and has 12 teeth 10t on the outer peripheral portion (see also FIGS. 6 to 8 described later).

FIG. 4 is a schematic view for explaining the opening and closing of the pilot hole. The disc member 10 has four (a plurality of examples) communication holes 10h, and as is schematically shown in FIG. 4, each of the four communication holes 10h is located at a rotational position of the disc member 10. Correspondingly, the pilot holes of the diaphragm valves 21 to 23 are released by selectively communicating with the back pressure chamber outflow holes 21c to 23c provided in the back pressure chambers 21b to 23b of the diaphragm valves 21 to 23. It has become. More specifically, the pilot holes of the diaphragm valves 21 to 23 are provided in the element members 40 so as to correspond to the back pressure chamber outflow holes 21c to 23c and the back pressure chamber outflow holes 21c to 23c. Is released when the disc member 10 is selectively communicated with the communication hole 10h. The four communication holes 10h are evenly arranged by 90 degrees in the circumferential direction. The back pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 are evenly arranged by 120 degrees in the circumferential direction.

FIG. 5 is a schematic view for explaining the disc pressing member 30. As schematically shown in FIG. 5, the disc pressing member 30 is interposed between the back pressure chamber outflow holes 21c to 23c and the disc member 10, and the disc member is provided by a coil spring 35 which is an example of the urging means. 10 is pressed in a direction away from the back pressure chamber outflow holes 21c to 23 (toward the element member 40).

Further, the disc holding member 30 is provided with outflow communication passages 31c to 33c communicating with the back pressure chamber outflow holes 21c to 23c of the diaphragm valves 21 to 23. In the present embodiment, the outflow passages 31c to 33c are each composed of tubular portions 31 to 33, and each of the tubular portions 31 to 33 is inserted into the corresponding back pressure chamber outflow holes 21c to 23c. A gap remains between each of the tubular portions 31 to 33 and the back pressure chamber outflow holes 21c to 23c, and the gap functions as a back pressure chamber inflow hole. (However, as shown in FIG. 4, the aspect in which the back pressure chamber inflow holes 21d to 23d are provided in a part of the diaphragm valves 21 to 23 is not excluded from the scope of the present invention at the time of filing the application of the present application.)

Returning to FIG. 2, a pressing button 11 is provided in the lower portion of the shower head housing 7 as an operating unit to which the user gives an operating force. (Instead of the pressing button 11, another type of button, a slide switch, or the like may be provided.)

The pressing button 11 is adapted to rotate around the rotation shaft 11s each time the pressing operation is performed by the user (every time the user applies a pressing force as an operating force). Then, in conjunction with the rotation operation of the pressing button 11, the contact (and slide) between the contact slide inclined portion 11a of the pressing button 11 and the contact ring 12a provided at the base end portion of the rod portion 12 is brought into contact with each other. By utilizing this, the rod portion 12 reciprocates in the axial direction of itself.

The tip of the rod portion 12 is exposed in the storage chamber 5 (underwater) (see also FIGS. 6 to 8), and the rod portion 12 is made of a metal rod material such as stainless steel having a property of not rusting. In the present embodiment, the rod portion 12 penetrates the element member 40 integrally fixed to the shower head housing 7 so as to be slidable and movable. A seal ring member 12s is provided to maintain watertightness. The rod portion 12 may be composed of not only a rigid body but also a plastic body such as a string or an elastic body such as rubber.

FIG. 6 is a schematic view for explaining a state of the disc member 10 at the start of the rotational operation, FIG. 7 is a schematic view for explaining a state of the disc member 10 during the rotational operation, and FIG. 8 is a schematic view. It is a schematic diagram for demonstrating the state at the end of the rotation operation of the disk member 10.

As shown in FIGS. 6 to 8, a coil spring 14 is arranged around the tip of the rod portion 12 located in the storage chamber 5. The base end of the coil spring 14 is fixed to the element member 40, thereby being fixed to the shower head housing 7 (relative to the rotation shaft 11s of the pressing button 11).

A claw member 15 is fixed to the tip of the coil spring 14, a stopper 13 for the claw member 15 is attached to the tip of the rod portion 12, and the tip of the coil spring 14 and the claw member 15 are the coil spring 14. Due to the deformation in the axial direction of the above, the stopper 13 can be moved in the axial direction in the region on the base end side of the rod portion 12.

Further, the tip of the coil spring 14 and the claw member 15 can be moved (posture can be changed) in the inclined direction by the deformation of the coil spring 14 in the inclined direction with respect to the axial direction.

On the side surface of the claw member 15 on the disc member 10 side, a claw 15t that engages with the teeth 10t of the disc member 10 is provided. Then, while the rod portion 12 is moving, the disc member 10 is rotated by the claw 15t pulling in the teeth 10t (FIG. 6 → FIG. 7 → FIG. 8).

In addition, a stop claw 16 for preventing the disc member 10 (teeth 10t) from rotating in the opposite direction is held by a stop claw fixing portion 17 provided on the element member 40.

[Action of the first embodiment]
Next, the operation of the shower head 1 according to the present embodiment will be described.

With reference to FIG. 2, when the pressing button 11 is pressed by the user, the pressing force (operating force) causes the contact slide inclined portion 11a of the pressing button 11 to rotate around the rotation shaft 11s. The rod portion 12 is moved to the base end side (right side in FIG. 2) in the axial direction via the contact ring 12a.

The state of FIG. 6 corresponds to the state before the pressing operation. When the movement of the rod portion 12 starts from this state, the disc member 10 is rotated so that the claw 15t of the claw member 15 pulls in the teeth 10t of the disc member 10 as shown in FIG. FIG. 8 corresponds to a state in which the pressing button 11 is at the innermost part and the rod portion 12 is moved to the most proximal side (right side in FIG. 2). In the state of FIG. 8, the stop claw 16 stops the tooth 10t one tooth ahead of the state of FIG. As described above, the disc member 10 is rotated by 30 degrees by one pressing operation of the pressing button 11.

In the state of FIG. 8, the coil spring 14 is in a state of being compressed between the stopper 13 and the claw member 15 at the tip of the rod portion 12 and the element member 40. In this state, when the pressing force on the pressing button 11 is released, the rod portion 12 and the pressing button 11 are returned to their original positions (the state shown in FIG. 6) by the restoring force of the coil spring 14. In this process, the claw 15t is not engaged with the tooth 10t, and the disc member 10 does not rotate in the reverse direction due to the presence of the stopper claw 16. Further, in this process, since the claw member 15 can move in the inclined direction (posture can be changed) by the deformation of the coil spring 14 in the inclined direction with respect to the axial direction, the resistance from the disk member 10 (the posture can be changed). Interference) can be effectively avoided. Then, when the claw member 15 returns to the original position (state in FIG. 6), the claw member 15 engages with the tooth 10t next to the tooth previously pulled in by the restoring force of the coil spring 14.

As described above, the four communication holes 10h are evenly arranged by 90 degrees in the circumferential direction, and the back pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 are evenly arranged by 120 degrees in the circumferential direction. Has been done. Therefore, when the disk member 10 rotates by 30 degrees, the back pressure chamber outflow hole 21c and the outflow hole 44 communicate with each other, and the back pressure chamber outflow holes 22c and 23c do not communicate with the outflow holes 45 and 46. A second water discharge mode in which the back pressure chamber outflow hole 22c and the outflow hole 45 communicate with each other and the back pressure chamber outflow holes 21c and 23c do not communicate with the outflow holes 44 and 46, and a back pressure chamber outflow hole 23c and outflow. It is possible to sequentially switch between the third water discharge mode in which the holes 46 communicate with each other and the back pressure chamber outflow holes 21c and 22c do not communicate with the outflow holes 44 and 45.

An example of a state in which the back pressure chamber outflow hole and the outflow hole do not communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is not opened is the state on the right side of FIGS. 4 and 5. In the state on the right side of FIGS. 4 and 5, the back pressure chamber outflow holes 22c and 23c and the outflow holes 45 and 46 are blocked by the disc member 10. On the other hand, the gap between the back pressure chamber inflow holes 22d and 23d (in the case of FIG. 4) or between the tubular portions 32 and 33 and the back pressure chamber outflow holes 22c and 23c functions as the back pressure chamber inflow hole. (In the case of FIG. 5), the water pressure in the storage chamber 5 and the water pressure in the back pressure chambers 23b and 23c are equal. Therefore, the diaphragm valves 22 and 23 are closed by the urging force of the coil springs 52 and 53 (not shown in FIGS. 4 and 5).

On the other hand, an example of a state in which the back pressure chamber outflow hole and the outflow hole communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is opened is the state on the left side of FIGS. 4 and 5. In the state on the left side of FIGS. 4 and 5, the back pressure chamber outflow hole 21c and the outflow hole 44 are communicated (opened) by the communication hole 10h of the disc member 10. In this state, water flows out from the back pressure chamber 21b through the back pressure chamber outflow hole 21c and the outflow hole 44, so that the water pressure in the storage chamber 5 becomes larger than the water pressure in the back pressure chamber 21b, and the coil spring 51 Despite the urging force (not shown in FIGS. 4 and 5), the diaphragm valve 21 is in the open state.

[Effect of the first embodiment]
As described above, according to the shower head 1 of the present embodiment, the three diaphragm valves 21 to 23 control the communication or cutoff between each of the three flow paths and the storage chamber 5, so that the flow path It is possible to realize a remarkable reduction in the operating force of the switching operation.

In particular, according to the shower head 1 of the present embodiment, the diaphragm is provided with a pilot hole for communicating the back pressure chambers 21b to 23b of the three diaphragms 21 to 23 arranged in a ring shape with the space outside the storage chamber 5. Since the valves 21 to 23 are centrally provided in the central region of the arrangement and are opened and closed by a common disc member 10 (pilot valve), the shower head 1 can be miniaturized, and the disc member 10 can be miniaturized. Since the moving range (moving distance) of the (pilot valve) may be small, the operating force can be further reduced.

Further, according to the shower head 1 of the present embodiment, the disc member 10 is rotatably supported around its own rotation axis and has teeth 10t on the outer peripheral portion. Therefore, the disc member 10 can be easily rotationally driven by using the teeth 10t.

Further, according to the shower head 1 of the present embodiment, since the disc member 10 is made of resin, high smoothness can be easily realized. Therefore, the sliding resistance can be suppressed, and it is not necessary to separately provide a sealing member.

Further, according to the shower head 1 of the present embodiment, the disc member 10 has four communication holes 10h, and each of the communication holes 10h has three communication holes 10h according to the rotation position of the disc member 10. The pilot holes of the diaphragm valves 21 to 23 are released by selectively communicating with the back pressure chamber outflow holes 21c to 23c provided in the back pressure chambers 21b to 23b of the diaphragm valves 21 to 23. .. As a result, the shower head 1 can be further miniaturized, and the rotation angle (moving distance) of the disc member 10 is as small as 30 degrees, so that the operating force can be further reduced.

Further, according to the shower head 1 of the present embodiment, the disc pressing member 30 is interposed between the back pressure chamber outflow holes 21c to 23c and the disc member 10, and each diaphragm valve is interposed in the disc pressing member 30. Outflow communication passages 31c to 33c communicating with the back pressure chamber outflow holes 21c to 23c of 21 to 23 are provided, and the disk holding member 30 uses a coil spring 35 to connect the disc member 10 to the back pressure chamber outflow hole 21c. It is designed to be pressed away from ~ 23c. As a result, it is not necessary to provide a seal member between the member (element member 40) on the side opposite to the back pressure chamber outflow holes 21c to 23c and the disc member 10 with respect to the disc member 10.

In particular, according to the shower head 1 of the present embodiment, the outflow communication passages 31c to 33c are each composed of tubular portions 31 to 33, and each tubular portion 31 to 33 is located in the corresponding back pressure chamber outflow holes 21c to 23c. It is inserted, and the gap between each tubular portion 31 to 33 and the back pressure chamber outflow holes 21c to 23c functions as a back pressure chamber inflow hole. Since the gap can be easily formed with high dimensional accuracy, it is possible to effectively suppress the variation in the characteristics of the back pressure chamber inflow hole (gap) between the plurality of diaphragm valves 21 to 23. ..

Further, according to the shower head 1 of the present embodiment, the pressing button 11 to which the user gives an operating force, the rod portion 12 that reciprocates in the axial direction of the pressing button 11 each time the pressing operation is performed, and the rod. A drive mechanism including a claw member 15 having a claw 15t attached to the tip end side of the portion 12 and engaging with the tooth 10t of the disc member 10 causes the claw 15t to pull in the tooth 10t while the rod portion 12 is moving. The disc member 10 is rotated by the means. By applying a force in the pulling direction in this way, it is possible to effectively prevent the rod portion 12 from buckling and deforming, and it is possible to reduce the rigidity required for the rod portion 12. As a result, the rod portion 12 can be formed not only by a rigid body but also by a string-shaped plastic body or an elastic body such as rubber.

In particular, according to the shower head 1 of the present embodiment, the base end of the rod portion 12 is connected to the pressing button 11, and the coil spring 14 is arranged around the tip portion of the rod portion 12, and the base of the coil spring 14 The end is fixed to the element member 40, the tip of the coil spring 14 is fixed to the claw member 15, and the stopper 13 for the claw member 15 is attached to the tip of the rod portion 12. As a result, the claw member 15 is movable relative to the rod portion 12 due to the deformation of the coil spring 14 (the axial direction and the direction inclined with respect to the axial direction). Therefore, when the claw member 15 after pulling in the tooth 10t returns to the original position (position in FIG. 6) in order to engage with the next tooth 10t, the resistance (interference) from the disk member 10 is effective. Can be avoided.

Further, according to the shower head 1 of the present embodiment, the three diaphragm valves 21 to 23 are integrated as one component diaphragm member 20, and a seal ring portion 24 is provided around the three diaphragm valves 21 to 23. As a result, it is not necessary to separately provide a seal ring member (see the second embodiment described later).

Further, according to the shower head 1 of the present embodiment, each of the diaphragm valves 21 to 23 is urged in the closing direction by coil springs 51 to 53, respectively. As a result, the opening and closing operations of the diaphragm valves 21 to 23 are stabilized.

[Structure of the second embodiment]
Next, the shower head according to the second embodiment of the present invention will be described with reference to the accompanying drawings. The shower head 101 of the present embodiment is also a shower head capable of switching a plurality of water discharge modes (water discharge in a plurality of water discharge modes is possible).

9 is a plan view of the shower head 101 according to the second embodiment of the present invention, FIG. 10 is a sectional view taken along line XX of the shower head 101 of FIG. 9, and FIG. 11 is a shower according to the present embodiment. It is an exploded perspective view of the head 101.

As shown in FIGS. 9 to 11, the shower head 101 of the present embodiment also has a storage chamber 105 (also referred to as a cavity) in which water is supplied and stored from a water supply source (not shown) via water supply members 102 and 103. ) Is provided.

A secondary side flow path member 104 formed by superimposing four substantially disc-shaped element members 140, 147, 148, and 149 is provided on the water discharge surface side of the shower head 101 with respect to the storage chamber 105. There is. The secondary side flow path member 104 further includes a central spout member 161 to 163 and a seal member 165, and has three (plural examples) corresponding to three (plural examples) spout modes. ) Has a flow path.

Of the secondary side flow path members 104, the element member 140 facing the storage chamber 105 is formed with three valve seats 141 to 143 raised on the storage chamber 105 side, and is the center of each valve seat 141 to 143. Is provided with a communication hole that communicates with the corresponding flow path. The three valve seats 141 to 143 (and the corresponding flow paths) are annularly arranged evenly by 120 degrees in the circumferential direction.

Diaphragm valves 121 to 123 are provided in an annular shape so as to correspond to each of the three valve seats 141 to 143. Unlike the first embodiment, the three diaphragm valves 121 to 123 are formed and arranged as separate and independent members.

Further, the seal ring member 124 is arranged so as to surround the three diaphragm valves 121 to 123. The seal ring member 124 is watertightly sandwiched by the upper edge portion 140a of the element member 140 and the cover member 108. The cover member 108 of the present embodiment includes a cover main body 108a and two upper disks 108b and 108c. On the other hand, each diaphragm valve 121 to 123 is supported on the upper surface of the element member 140 via the space members 171 to 173.

Further, each diaphragm valve 121 to 123 is provided with coil springs 151 to 153 (an example of an elastic member) between the lower surface of the cover member 108, and is urged in the closing direction by the coil springs 151 to 153. There is.

Further, the three diaphragm valves 121 to 123 of the present embodiment are also arranged in an annular shape, and the back pressure chambers 121b to 123b of the diaphragm valves 121 to 123 and the element member 140 which is a space outside the storage chamber 105 The pilot holes (partly formed on the lower surface side of the cover member 108, back pressure chamber outflow holes 121c to 123c) for communicating with the lower space are on the central side of the arrangement of the three diaphragm valves 121 to 123. It is centrally provided in the area of the above, and is opened and closed by a disk member 110 that functions as a common pilot valve. (When there are two diaphragm valves, the pilot holes for communicating the back pressure chamber of each diaphragm valve and the space below the element member 140, which is the space outside the storage chamber 105, are the two diaphragms. It can be centrally provided in the intermediate area of the valve arrangement.)

The disc member 110 of the present embodiment is also made of resin, is rotatably supported around its own rotation axis, and has 12 teeth 110t on the outer peripheral portion.

FIG. 12 is a schematic view for explaining the opening and closing of the pilot hole, as in FIG. 4, and corresponds to the reference numeral in FIG. 4 plus 100. The disc member 110 of the present embodiment also has four (a plurality of examples) communication holes 110h, and each of the four communication holes 110h has a diaphragm valve according to the rotation position of the disc member 110. The pilot holes of the diaphragm valves 121 to 123 are opened by selectively communicating with the back pressure chamber outflow holes 121c to 123c provided in the back pressure chambers 121b to 123b of 121 to 123. More specifically, the pilot holes of the diaphragm valves 121 to 123 are provided in the element member 140 so as to correspond to the back pressure chamber outflow holes 121c to 123c and the back pressure chamber outflow holes 121c to 123c. Is released when the disc member 110 is selectively communicated with the communication hole 110h. The four communication holes 110h are also evenly arranged by 90 degrees in the circumferential direction, and the back pressure chamber outflow holes 121c to 123c and the outflow holes 144 to 146 are also evenly arranged by 120 degrees in the circumferential direction.

FIG. 13 is a schematic view for explaining the disc pressing member 30 as in FIG. 5, and corresponds to a reference code in FIG. 5 plus 100. The disk holding member 130 is interposed between the back pressure chamber outflow holes 121c to 123c and the disc member 110, and the disk member 110 is moved by the coil spring 135, which is an example of the urging means, to the back pressure chamber outflow holes 121c to 123. It is designed to be pressed away from the element member 140 (toward the element member 140).

Further, the disc holding member 130 is provided with outflow communication passages 131c to 133c communicating with the back pressure chamber outflow holes 121c to 123c of the diaphragm valves 121 to 123, and also in the present embodiment, the outflow communication passages 131c to 133c. Each is composed of tubular portions 131 to 133, and each tubular portion 131 to 133 is inserted into the corresponding back pressure chamber outflow holes 121c to 123c. A gap remains between each of the tubular portions 131 to 133 and the back pressure chamber outflow holes 121c to 123c, and the gap functions as a back pressure chamber inflow hole. (As shown in FIG. 12, the aspect in which the back pressure chamber inflow holes 121d to 123d are provided in a part of the diaphragm valves 121 to 123 is not excluded from the scope of the present invention at the time of filing the application of the present application.)

Returning to FIG. 11, a pressing button 111 is provided in the lower portion of the shower head housing 107 as an operation unit to which the user gives an operation force. (Instead of the pressing button 111, another type of button, a slide switch, or the like may be provided.)

The pressing button 111 is adapted to rotate around the rotation shaft 111s each time the pressing operation is performed by the user (every time the user applies a pressing force as an operating force). Then, in conjunction with the rotation operation of the pressing button 111, the contact (and slide) between the contact slide inclined portion 111a of the pressing button 111 and the contact ring 112a provided at the base end portion of the rod portion 112 is brought into contact with each other. By utilizing this, the rod portion 112 reciprocates in the axial direction of itself.

The tip of the rod 112 is exposed in the storage chamber 105 (underwater) (see also FIG. 14), and is made of a metal rod such as stainless steel having a property of not rusting. In the present embodiment, the rod portion 112 penetrates the element member 140 integrally fixed to the shower head housing 107 so as to be slidable and movable. A seal ring member 112s is provided to maintain watertightness.

FIG. 14 is a schematic view for explaining a state of the disk member 110 at the start of the rotational operation, as in FIG. As shown in FIG. 14, a coil spring 114 is arranged around the tip of the rod portion 112 located in the storage chamber 105. The base end of the coil spring 114 is fixed to the element member 140, thereby being fixed to the shower head housing 107 (with respect to the rotation shaft 111s of the pressing button 111).

A claw member 115 is fixed to the tip of the coil spring 114, a stopper 113 for the claw member 115 is attached to the tip of the rod portion 112, and the tip of the coil spring 114 and the claw member 115 are the coil spring 114. Due to the deformation in the axial direction of the above, the stopper 113 can be moved in the axial direction in the region on the base end side of the rod portion 112.

Further, the tip of the coil spring 114 and the claw member 115 can be moved (posture can be changed) in the inclined direction by the deformation of the coil spring 114 in the inclined direction with respect to the axial direction.

On the side surface of the claw member 115 on the disc member 110 side, a claw 115t that engages with the teeth 110t of the disc member 110 is provided. Then, while the rod portion 112 is moving, the claw 115t pulls in the teeth 110t, so that the disc member 110 is rotated.

In addition, a stop claw 116 for preventing the disc member 110 (teeth 110t) from rotating in the opposite direction is held by a stop claw fixing portion 117 provided on the element member 140.
[Action of the second embodiment]
Next, the operation of the shower head 101 according to the present embodiment will be described.

With reference to FIG. 13, when the pressing button 111 is pressed by the user, the pressing force (operating force) causes the contact slide inclined portion 111a of the pressing button 111 to rotate around the rotation shaft 111s. The rod portion 112 is moved to the base end side (right side in FIG. 13) in the axial direction via the contact ring 112a.

The state of FIG. 14 corresponds to the state before the pressing operation. When the movement of the rod portion 112 starts from this state, the disc member 110 is rotated so that the claw 115t of the claw member 115 pulls in the teeth 110t of the disc member 110 (see also FIG. 7). With the pressing button 111 at the innermost part and the rod portion 112 moved to the most proximal side (right side in FIG. 13), the stop claw 116 stops the tooth 110t one tooth ahead of the state shown in FIG. (See also FIG. 8). As a result, the disc member 110 is rotated by 30 degrees by one pressing operation of the pressing button 111.

In this state, the coil spring 114 is in a state of being compressed between the stopper 113 at the tip of the rod portion 112, the claw member 115, and the element member 140. In this state, when the pressing force on the pressing button 111 is released, the rod portion 112 and the pressing button 111 are returned to their original positions (the state shown in FIG. 14) by the restoring force of the coil spring 114. In this process, the claw 115t is not engaged with the tooth 110t, and the disc member 110 does not rotate in the reverse direction due to the presence of the stop claw 116. Further, in this process, since the claw member 115 can move (change its posture) in the inclined direction due to the deformation of the coil spring 114 in the inclined direction with respect to the axial direction, the resistance from the disk member 110 (the posture can be changed). Interference) can be effectively avoided. Then, when the claw member 115 returns to the original position (state in FIG. 14), the claw member 115 engages with the tooth 110t next to the tooth previously pulled in by the restoring force of the coil spring 114.

As described above, the four communication holes 110h are evenly arranged by 90 degrees in the circumferential direction, and the back pressure chamber outflow holes 121c to 123c and the outflow holes 144 to 146 are evenly arranged by 120 degrees in the circumferential direction. Has been done. Therefore, as the disk member 110 rotates by 30 degrees, the back pressure chamber outflow hole 121c and the outflow hole 144 communicate with each other, and the back pressure chamber outflow holes 122c and 123c and the outflow holes 145 and 146 do not communicate with each other. A second water discharge mode in which the back pressure chamber outflow hole 122c and the outflow hole 145 communicate with each other and the back pressure chamber outflow holes 121c and 123c do not communicate with the outflow holes 144 and 146, and the back pressure chamber outflow hole 123c and outflow. It is possible to sequentially switch between a third water discharge mode in which the holes 146 communicate with each other and the back pressure chamber outflow holes 121c and 122c do not communicate with the outflow holes 144 and 145.

An example of a state in which the back pressure chamber outflow hole and the outflow hole do not communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is not opened is the state on the right side of FIGS. 12 and 13. In the state on the right side of FIGS. 12 and 13, the back pressure chamber outflow holes 122c and 123c and the outflow holes 145 and 146 are blocked by the disc member 110. On the other hand, the gap between the back pressure chamber inflow holes 122d and 123d (in the case of FIG. 12) or between the tubular portions 132 and 133 and the back pressure chamber outflow holes 122c and 123c functions as the back pressure chamber inflow holes. (In the case of FIG. 13), the water pressure in the storage chamber 105 and the water pressure in the back pressure chambers 123b and 123c are equal. Therefore, the diaphragm valves 122 and 123 are closed by the urging force of the coil springs 152 and 153 (not shown in FIGS. 12 and 13).

On the other hand, an example of a state in which the back pressure chamber outflow hole and the outflow hole communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is opened is the state on the left side of FIGS. 12 and 13. In the state on the left side of FIGS. 12 and 13, the back pressure chamber outflow hole 121c and the outflow hole 144 are communicated (opened) by the communication hole 110h of the disc member 110. In this state, water flows out from the back pressure chamber 121b through the back pressure chamber outflow hole 121c and the outflow hole 144, so that the water pressure in the storage chamber 105 becomes larger than the water pressure in the back pressure chamber 121b, and the coil spring 151 The diaphragm valve 121 is in the open state in spite of the urging force (not shown in FIGS. 12 and 13).

[Effect of the second embodiment]
As described above, according to the shower head 101 of the present embodiment, the three diaphragm valves 121 to 123 control the communication or shutoff between each of the three flow paths and the storage chamber 105, so that the flow path It is possible to realize a remarkable reduction in the operating force of the switching operation.

In particular, according to the shower head 101 of the present embodiment, the diaphragm is provided with a pilot hole for communicating the back pressure chambers 121b to 123b of the three diaphragms 121 to 123 arranged in a ring shape with the space outside the storage chamber 105. Since the valves 121 to 123 are centrally provided in the central region of the arrangement and are opened and closed by a common disc member 110 (pilot valve), the shower head 101 can be miniaturized and the disc member 110 can be miniaturized. Since the moving range (moving distance) of the (pilot valve) may be small, the operating force can be further reduced.

Further, according to the shower head 101 of the present embodiment, the disc member 110 is rotatably supported around its own rotation axis and has teeth 110t on the outer peripheral portion. Therefore, the disc member 110 can be easily rotationally driven by using the teeth 110t.

Further, according to the shower head 101 of the present embodiment, since the disc member 110 is made of resin, high smoothness can be easily realized. Therefore, the sliding resistance can be suppressed, and it is not necessary to separately provide a sealing member.

Further, according to the shower head 101 of the present embodiment, the disc member 110 has four communication holes 110h, and each of the communication holes 110h has three communication holes 110h according to the rotation position of the disc member 110. The pilot holes of the diaphragm valves 121 to 123 are released by selectively communicating with the back pressure chamber outflow holes 121c to 123c provided in the back pressure chambers 121b to 123b of the diaphragm valves 121 to 123. .. As a result, the shower head 101 can be further miniaturized, and the rotation angle (moving distance) of the disc member 110 is as small as 30 degrees, so that the operating force can be further reduced.

Further, according to the shower head 101 of the present embodiment, the disc pressing member 130 is interposed between the back pressure chamber outflow holes 121c to 123c and the disc member 110, and each diaphragm valve is interposed in the disc pressing member 130. Outflow communication passages 131c to 133c communicating with the back pressure chamber outflow holes 121c to 123c of 121 to 123 are provided, and the disk holding member 130 uses a coil spring 135 to connect the disc member 110 to the back pressure chamber outflow hole 121c. It is designed to be pressed away from ~ 123c. As a result, it is not necessary to provide a seal member between the member (element member 140) on the side opposite to the back pressure chamber outflow holes 121c to 123c and the disc member 110 with respect to the disc member 110.

In particular, according to the shower head 101 of the present embodiment, the outflow communication passages 131c to 133c are each composed of tubular portions 131 to 133, and each tubular portion 131 to 133 is contained in the corresponding back pressure chamber outflow holes 121c to 123c. It is inserted, and the gap between each tubular portion 131 to 133 and the back pressure chamber outflow holes 121c to 123c functions as a back pressure chamber inflow hole. Since the gap can be easily formed with high dimensional accuracy, it is possible to effectively suppress the variation in the characteristics of the back pressure chamber inflow hole (gap) between the plurality of diaphragm valves 121 to 123. ..

Further, according to the shower head 101 of the present embodiment, the pressing button 111 to which the user gives an operating force, the rod portion 112 that reciprocates in the axial direction of the pressing button 111 each time the pressing operation is performed, and the rod. A drive mechanism including a claw member 115 having a claw 115t attached to the tip end side of the portion 112 and engaging with the tooth 110t of the disc member 110 causes the claw 115t to pull in the tooth 110t while the rod portion 112 is moving. The disk member 110 is rotated by the means of the disk member 110. By applying a force in the pulling direction in this way, it is possible to effectively prevent the rod portion 112 from buckling and deforming, and it is possible to reduce the required rigidity. As a result, the rod portion 12 does not necessarily have to be a rigid body, and can be formed of a string-shaped plastic body or an elastic body such as rubber.

In particular, according to the shower head 101 of the present embodiment, the base end of the rod portion 112 is connected to the pressing button 111, the coil spring 114 is arranged around the tip portion of the rod portion 112, and the base of the coil spring 114. The end is fixed to the element member 140, the tip of the coil spring 114 is fixed to the claw member 115, and the stopper 113 for the claw member 115 is attached to the tip of the rod portion 112. As a result, the claw member 115 can move relative to the rod portion 112 (in the axial direction and in the direction inclined with respect to the axial direction) due to the deformation of the coil spring 114. Therefore, when the claw member 115 after pulling in the tooth 110t returns to the original position (position in FIG. 14) in order to engage with the next tooth 110t, the resistance (interference) from the disk member 110 is effective. Can be avoided.

Further, according to the shower head 101 of the present embodiment, the three diaphragm valves 121 to 123 are separate parts. As a result, each diaphragm valve 121 to 123 can be replaced individually.

Further, according to the shower head 101 of the present embodiment, the diaphragm valves 121 to 123 are urged in the closing direction by coil springs 151 to 153, respectively. As a result, the opening / closing operation of each diaphragm valve 121 to 123 is stabilized.

[Supplementary information on flow path patterns]
In the shower heads 1 and 101 of each of the above embodiments, the opening and closing of each of the three diaphragm valves 21 to 23 and 121 to 123 is performed by each of the three flow paths of the secondary side flow path members 4 and 104. Corresponds to 1: 1 communication / cutoff, and only one of the diaphragm valves is opened according to the rotation position of the disk members 10 and 110, that is, only one of the flow paths communicates. However, the present invention is not limited to such an embodiment.

For example, by changing the arrangement pattern of the communication holes 10h and 110h of the disc members 10 and 110, a plurality of diaphragm valves are opened at the same time according to the rotation position of the disc members 10 and 110, that is, a plurality of flows are simultaneously opened. The roads may be communicated and water may be discharged in a complex manner.

Alternatively, when one diaphragm valve is opened by changing the flow path pattern of the secondary side flow path members 4 and 104, a plurality of flow paths are communicated at the same time and water is discharged in a complex manner. You may.

Further, by changing the arrangement pattern of the communication holes 10h and 110h of the disc members 10 and 110, all the diaphragm valves are closed at the same time according to the rotation position of the disc members 10 and 110, that is, a plurality of diaphragm valves are closed at the same time. The flow path may be closed to stop water. With this configuration, it is possible to temporarily stop water by operating the pressing button 11.

[Modified example of the second embodiment]
The shower head 101 of the second embodiment can switch between a plurality of water discharge modes by using three separate diaphragm valves 121 to 123 (an example of a main valve body) (water discharge in a plurality of water discharge modes is possible). ) Shower head.

In this embodiment, each of the diaphragm valves 121 to 123 can be replaced by, for example, a piston valve (another example of the main valve body).

FIG. 15 is a schematic view corresponding to FIG. 13 showing a configuration example in which the diaphragm valves 121 to 123 are replaced with piston valves 221 to 223.

In the modified example shown in FIG. 15, the piston valves 221 to 223 can be slidably moved in the corresponding sliding guide cylinders 271-273 provided in the cover main body 108a via the watertight rings 261 to 263. It is provided.

Each piston valve 221 to 223 is provided with coil springs 251 to 253 (an example of an elastic member) between the lower surface of the cover main body 108a, and is urged in the closing direction by the coil springs 251 to 253. ..

Even in such a modified example, the same effect as that of the shower head 101 of the second embodiment can be obtained.

Specifically, the state in which the pilot holes of the corresponding piston valves 222 and 223 are not opened (the state on the right side of FIG. 16), that is, the back pressure chamber outflow holes 222c and 223c and the outflow holes 45 and 46 are disk members. In the state blocked by 10, the gap between the tubular portions 32, 33 and the back pressure chamber outflow holes 222c and 223c functions as the back pressure chamber inflow holes, and the water pressure in the storage chamber 5 and the back pressure chamber 223b The water pressure in 223c is equal. Therefore, the piston valves 222 and 223 are closed by the urging force of the coil springs 252 and 253.

On the other hand, the pilot hole of the corresponding piston valve 221 is opened (the state on the left side of FIG. 16), that is, the back pressure chamber outflow hole 221c and the outflow hole 44 are communicated (released) by the communication hole 10h of the disk member 10. In this state, water flows out from the back pressure chamber 221b through the back pressure chamber outflow hole 221c and the outflow hole 44, so that the water pressure in the storage chamber 5 becomes higher than the water pressure in the back pressure chamber 221b. Despite the urging force of the coil spring 251, the piston valve 221 is in the open state.

[Structure of Third Embodiment]
As described above, the shower head 1 of the first embodiment is a shower head capable of switching a plurality of water discharge modes (water discharge in a plurality of water discharge modes is possible). This embodiment is a shower head that can only switch between water discharge and water stop when the water discharge mode is limited to one type. That is, the disclosure of the shower head 1 of the first embodiment also serves as the disclosure of the shower head that switches between water discharge and water stop (particularly, see paragraph 0120).

However, for the sake of easier understanding, a configuration example in which the present invention is applied to a shower head (one type of water discharge mode) for switching between water discharge and water stop will be described below as a third embodiment.

16 is a partial sectional perspective view of the shower head 301 according to the third embodiment of the present invention, FIG. 17 is a sectional view of the shower head 301 according to the present embodiment, and FIG. 18 is a sectional view of the shower head 301 according to the present embodiment. It is an exploded perspective view of 301.

As shown in FIGS. 16 to 18, in the shower head 301 of the present embodiment, water is supplied from the water supply source (not shown) via the water supply members 2 and 3 as in the shower head 1 of the first embodiment. It is provided with a storage chamber 5 (also referred to as a cavity) for storing.

On the water discharge surface side of the shower head 301 with respect to the storage chamber 5, a secondary side flow path member 304 composed of substantially disk-shaped element members (s) is provided. The secondary side flow path member 304 has only one flow path corresponding to only one water discharge mode.

In the portion of the secondary side flow path member 304 facing the storage chamber 5, three valve seats 341 to 343 raised on the storage chamber 5 side are formed, and in the center of each valve seat 341 to 343. A communication hole is provided to communicate with the corresponding flow path (see also FIG. 4). The three valve seats 341 to 343 (and the corresponding flow paths) are annularly arranged evenly by 120 degrees in the circumferential direction.

Similar to the shower head 1 of the first embodiment, diaphragm valves 21 to 23 are provided in an annular shape so as to correspond to each of the three valve seats 341 to 343. The three diaphragm valves 21 to 23 are integrally formed as a single component diaphragm member 20, but each of the diaphragm valves 21 to 23 can operate independently.

A seal ring portion 24 is formed on the outer peripheral portion of the diaphragm member 20. The seal ring portion 24 is watertightly sandwiched by the upper edge portion of the secondary side flow path member 304 and the cover member 8. On the other hand, the region on the center side of the diaphragm member 20 is supported on the upper surface of the secondary side flow path member 304 via the space member 38.

Further, similarly to the shower head 1 of the first embodiment, each diaphragm valve 21 to 23 is provided with coil springs 51 to 53 (an example of an elastic member) between the diaphragm valves 21 to 23 and the lower surface of the cover member 8, respectively. It is urged in the closing direction by coil springs 51 to 53.

Further, the three diaphragm valves 21 to 23 of the present embodiment are also arranged in an annular shape, and the secondary side flow which is the space outside the back pressure chambers 21b to 23b and the storage chamber 5 of each diaphragm valve 21 to 23. Pilot holes (partially formed on the lower surface side of the cover member 8 are back pressure chamber outflow holes 21c to 23c) for communicating with the space in the road member 304 are arranged in the three diaphragm valves 21 to 23. It is centrally provided in the area on the central side of the above, and is opened and closed by a disk member 310 that functions as a common pilot valve. (When there are two diaphragm valves, the pilot hole for communicating the back pressure chamber of each diaphragm valve and the space inside the secondary side flow path member 0, which is the space outside the storage chamber 5, is the 2 It can be centrally installed in the area on the intermediate side of the arrangement of the individual diaphragm valves.)

Like the shower head 1 of the first embodiment, the disc member 310 is made of resin, is rotatably supported around its own rotation axis, and has 12 teeth 310t on the outer peripheral portion. (See also FIGS. 6 to 8).

The opening and closing of the pilot hole is substantially the same as that of the shower head 1 of the first embodiment, but will be described with reference to FIG. 4 just in case (valve seats 41 to 43 in FIG. 4 are valve seats 341 of the present embodiment). The disk member 10 and the communication hole 10h in FIG. 4 correspond to the disk member 310 and the communication hole 310h of the present embodiment). The disk member 310 has six communication holes 310h (which were four in the first embodiment), and as is schematically shown in FIG. 4, each of the six communication holes 310h has a communication hole 310h. The diaphragm valves 21 to 23 are selectively communicated with the back pressure chamber outflow holes 21c to 23c provided in the back pressure chambers 21b to 23b of the diaphragm valves 21 to 23 according to the rotation position of the disc member 310. It is designed to open the pilot hole. More specifically, the pilot holes of the diaphragm valves 21 to 23 are provided in the secondary side flow path member 304 so as to correspond to the back pressure chamber outflow holes 21c to 23c and the back pressure chamber outflow holes 21c to 23c. The holes 44 to 46 are opened when they are selectively communicated with each other by the communication holes 310h of the disk member 310. The six communication holes 310h are evenly arranged by 60 degrees in the circumferential direction. The back pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 are evenly arranged by 120 degrees in the circumferential direction.

The disc holding member 30 is the same as the shower head 1 of the first embodiment, but will be described with reference to FIG. 5 just in case (valve seats 41 to 43 in FIG. 5 are valve seats 341 to the present embodiment). It corresponds to 343, and the disk member 10 and the communication hole 10h in FIG. 5 correspond to the disk member 310 and the communication hole 310h of the present embodiment). As schematically shown in FIG. 5, the disc pressing member 30 is interposed between the back pressure chamber outflow holes 21c to 23c and the disc member 310, and the disc member is provided by a coil spring 35 which is an example of the urging means. The 310 is pressed in the direction away from the back pressure chamber outflow holes 21c to 23 (toward the secondary side flow path member 304).

Further, the disc holding member 30 is provided with outflow communication passages 31c to 33c communicating with the back pressure chamber outflow holes 21c to 23c of the diaphragm valves 21 to 23. In the present embodiment, the outflow passages 31c to 33c are each composed of tubular portions 31 to 33, and each of the tubular portions 31 to 33 is inserted into the corresponding back pressure chamber outflow holes 21c to 23c. A gap remains between each of the tubular portions 31 to 33 and the back pressure chamber outflow holes 21c to 23c, and the gap functions as a back pressure chamber inflow hole. (However, as shown in FIG. 4, the aspect in which the back pressure chamber inflow holes 21d to 23d are provided in a part of the diaphragm valves 21 to 23 is not excluded from the scope of the present invention at the time of filing the application of the present application.)

Returning to FIG. 17, similarly to the shower head 1 of the first embodiment, a pressing button 11 as an operation unit to which the user gives an operation force is provided in the lower part of the shower head housing 7. (Instead of the pressing button 11, another type of button, a slide switch, or the like may be provided.)

The pressing button 11 is adapted to rotate around the rotation shaft 11s each time the pressing operation is performed by the user (every time the user applies a pressing force as an operating force). Then, in conjunction with the rotation operation of the pressing button 11, the contact (and slide) between the contact slide inclined portion 11a of the pressing button 11 and the contact ring 12a provided at the base end portion of the rod portion 12 is brought into contact with each other. By utilizing this, the rod portion 12 reciprocates in the axial direction of itself.

The tip of the rod portion 12 is exposed in the storage chamber 5 (underwater) (see also FIGS. 6 to 8), and the rod portion 12 is made of a metal rod material such as stainless steel having a property of not rusting. Also in this embodiment, the rod portion 12 slidably penetrates in the secondary side flow path member 304 integrally fixed to the shower head housing 7. A seal ring member 12s is provided to maintain watertightness. The rod portion 12 may be composed of not only a rigid body but also a plastic body such as a string or an elastic body such as rubber.

The state of the disk member 310 at the start of the rotational operation is the same as that of the shower head 1 of the first embodiment, but will be described with reference to FIGS. 6 to 8 just in case (element members in FIGS. 6 to 8). 40 corresponds to the secondary side flow path member 304 of the present embodiment, and the disk member 10, the communication hole 10h and the tooth 10t in FIGS. 6 to 8 correspond to the disk member 310, the communication hole 310h and the tooth 310t of the present embodiment. To do).

As shown in FIGS. 6 to 8, a coil spring 14 is arranged around the tip of the rod portion 12 located in the storage chamber 5. The base end of the coil spring 14 is fixed to the secondary side flow path member 304, thereby being fixed to the shower head housing 7 (relative to the rotation shaft 11s of the pressing button 11).

A claw member 15 is fixed to the tip of the coil spring 14, a stopper 13 for the claw member 15 is attached to the tip of the rod portion 12, and the tip of the coil spring 14 and the claw member 15 are the coil spring 14. Due to the deformation in the axial direction of the above, the stopper 13 can be moved in the axial direction in the region on the base end side of the rod portion 12.

Further, the tip of the coil spring 14 and the claw member 15 can be moved (posture can be changed) in the inclined direction by the deformation of the coil spring 14 in the inclined direction with respect to the axial direction.

On the side surface of the claw member 15 on the disc member 310 side, a claw 15t that engages with the teeth 310t of the disc member 310 is provided. Then, the disc member 310 is rotated by the claw 15t pulling in the teeth 310t while the rod portion 12 is moving (FIG. 6 → FIG. 7 → FIG. 8).

In addition, a stop claw 16 for preventing the disc member 310 (teeth 310t) from rotating in the opposite direction is held by a stop claw fixing portion 17 provided on the secondary side flow path member 304.

[Action of Third Embodiment]
Next, the operation of the shower head 301 according to the present embodiment will be described.

With reference to FIG. 17, when the pressing button 11 is pressed by the user, the pressing force (operating force) causes the contact slide inclined portion 11a of the pressing button 11 to rotate around the rotation shaft 11s. The rod portion 12 is moved to the base end side (right side in FIG. 17) in the axial direction via the contact ring 12a.

The state of FIG. 6 corresponds to the state before the pressing operation. When the movement of the rod portion 12 starts from this state, the disc member 310 is rotated so that the claw 15t of the claw member 15 pulls in the teeth 310t of the disc member 310, as shown in FIG. FIG. 8 corresponds to a state in which the pressing button 11 is at the innermost part and the rod portion 12 is moved to the most proximal side (right side in FIG. 17). In the state of FIG. 8, the stop claw 16 holds the tooth 310t one step ahead of the state of FIG. As described above, the disc member 310 is rotated by 30 degrees by one pressing operation of the pressing button 11.

In the state of FIG. 8, the coil spring 14 is in a state of being compressed between the stopper 13 and the claw member 15 at the tip of the rod portion 12 and the secondary side flow path member 304. In this state, when the pressing force on the pressing button 11 is released, the rod portion 12 and the pressing button 11 are returned to their original positions (the state shown in FIG. 6) by the restoring force of the coil spring 14. In this process, the claw 15t is not engaged with the tooth 310t, and the disc member 310 does not rotate in the reverse direction due to the presence of the stopper claw 16. Further, in this process, since the claw member 15 can move in the inclined direction (posture can be changed) by the deformation of the coil spring 14 in the inclined direction with respect to the axial direction, the resistance from the disk member 310 (the posture can be changed). Interference) can be effectively avoided. Then, when the claw member 15 returns to the original position (state in FIG. 6), the claw member 15 engages with the tooth 310t next to the tooth previously pulled in by the restoring force of the coil spring 14.

As described above, the six communication holes 310h are evenly arranged by 60 degrees in the circumferential direction, and the back pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 are evenly arranged by 120 degrees in the circumferential direction. Has been done. Therefore, by rotating the disk member 310 by 30 degrees, the back pressure chamber outflow holes 21c to 23c and the back pressure chamber outflow holes 44 to 46 (although the combination is free) communicate with each other at the same time, and the back pressure chamber outflow hole It is possible to sequentially switch between the water stop mode in which the 21c to 23c and the outflow holes 44 to 46 do not communicate with each other.

An example of a state in which the back pressure chamber outflow hole and the outflow hole do not communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is not opened is the state on the right side of FIGS. 4 and 5. In the state on the right side of FIGS. 4 and 5, the back pressure chamber outflow holes 22c and 23c and the outflow holes 45 and 46 are blocked by the disc member 310. On the other hand, the gap between the back pressure chamber inflow holes 22d and 23d (in the case of FIG. 4) or between the tubular portions 32 and 33 and the back pressure chamber outflow holes 22c and 23c functions as the back pressure chamber inflow hole. (In the case of FIG. 5), the water pressure in the storage chamber 5 and the water pressure in the back pressure chambers 23b and 23c are equal. Therefore, the diaphragm valves 22 and 23 are closed by the urging force of the coil springs 52 and 53 (not shown in FIGS. 4 and 5).

On the other hand, an example of a state in which the back pressure chamber outflow hole and the outflow hole communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is opened is the state on the left side of FIGS. 4 and 5. In the state on the left side of FIGS. 4 and 5, the back pressure chamber outflow hole 21c and the outflow hole 44 are communicated (opened) by the communication hole 310h of the disc member 310. In this state, water flows out from the back pressure chamber 21b through the back pressure chamber outflow hole 21c and the outflow hole 44, so that the water pressure in the storage chamber 5 becomes larger than the water pressure in the back pressure chamber 21b, and the coil spring 51 Despite the urging force (not shown in FIGS. 4 and 5), the diaphragm valve 21 is in the open state.

[Effect of Third Embodiment]
As described above, according to the shower head 301 of the present embodiment, the three diaphragm valves 21 to 23 communicate (spout) or shut off (stop water) the flow path of the secondary side flow path member 304 and the storage chamber 5. ) Is controlled, so that it is possible to realize a remarkable reduction in the operating force of the water discharge / water stop switching operation.

In particular, according to the shower head 301 of the present embodiment, the diaphragm is provided with a pilot hole for communicating the back pressure chambers 21b to 23b of the three diaphragms 21 to 23 arranged in a ring shape with the space outside the storage chamber 5. Since the valves 21 to 23 are centrally provided in the central region of the arrangement and are opened and closed by a common disc member 310 (pilot valve), the shower head 301 can be miniaturized, and the disc member 310 can be realized. Since the moving range (moving distance) of the (pilot valve) may be small, the operating force can be further reduced.

Further, according to the shower head 301 of the present embodiment, the disc member 310 is rotatably supported around its own rotation axis and has teeth 310t on the outer peripheral portion. Therefore, the disc member 310 can be easily rotationally driven by using the teeth 310t.

Further, according to the shower head 301 of the present embodiment, since the disc member 310 is made of resin, high smoothness can be easily realized. Therefore, the sliding resistance can be suppressed, and it is not necessary to separately provide a sealing member.

Further, according to the shower head 1 of the present embodiment, the disc member 310 has six communication holes 310h, and each of the communication holes 310h has three communication holes 310 depending on the rotation position of the disc member 310. The pilot holes of the diaphragm valves 21 to 23 are released by selectively communicating with the back pressure chamber outflow holes 21c to 23c provided in the back pressure chambers 21b to 23b of the diaphragm valves 21 to 23. .. As a result, the shower head 301 can be further miniaturized, and the rotation angle (moving distance) of the disc member 310 is as small as 30 degrees, so that the operating force can be further reduced.

Further, according to the shower head 301 of the present embodiment, the disc pressing member 30 is interposed between the back pressure chamber outflow holes 21c to 23c and the disc member 310, and each diaphragm valve is interposed in the disc pressing member 30. Outflow communication passages 31c to 33c communicating with the back pressure chamber outflow holes 21c to 23c of 21 to 23 are provided, and the disk holding member 30 uses a coil spring 35 to connect the disc member 310 to the back pressure chamber outflow hole 21c. It is designed to be pressed away from ~ 23c. As a result, it is not necessary to provide a seal member between the member (secondary side flow path member 304) on the side opposite to the back pressure chamber outflow holes 21c to 23c and the disc member 310 with respect to the disc member 310.

In particular, according to the shower head 301 of the present embodiment, the outflow communication passages 31c to 33c are each composed of tubular portions 31 to 33, and each tubular portion 31 to 33 is located in the corresponding back pressure chamber outflow holes 21c to 23c. It is inserted, and the gap between each tubular portion 31 to 33 and the back pressure chamber outflow holes 21c to 23c functions as a back pressure chamber inflow hole. Since the gap can be easily formed with high dimensional accuracy, it is possible to effectively suppress the variation in the characteristics of the back pressure chamber inflow hole (gap) between the plurality of diaphragm valves 21 to 23. ..

Further, according to the shower head 301 of the present embodiment, the pressing button 11 to which the user gives an operating force, the rod portion 12 that reciprocates in the axial direction of the pressing button 11 each time the pressing operation is performed, and the rod. A drive mechanism including a claw member 15 having a claw 15t attached to the tip end side of the portion 12 and engaging with the tooth 310t of the disc member 310 causes the claw 15t to pull in the tooth 310t while the rod portion 12 is moving. The disc member 310 is rotated by. By applying a force in the pulling direction in this way, it is possible to effectively prevent the rod portion 12 from buckling and deforming, and it is possible to reduce the rigidity required for the rod portion 12. As a result, the rod portion 12 can be formed not only by a rigid body but also by a string-shaped plastic body or an elastic body such as rubber.

In particular, according to the shower head 301 of the present embodiment, the base end of the rod portion 12 is connected to the pressing button 11, and the coil spring 14 is arranged around the tip portion of the rod portion 12, and the base of the coil spring 14 The end is fixed to the secondary side flow path member 304, the tip of the coil spring 14 is fixed to the claw member 15, and the stopper 13 for the claw member 15 is attached to the tip of the rod portion 12. As a result, the claw member 15 is movable relative to the rod portion 12 due to the deformation of the coil spring 14 (the axial direction and the direction inclined with respect to the axial direction). Therefore, when the claw member 15 after pulling in the tooth 310t returns to the original position (position in FIG. 6) in order to engage with the next tooth 310t, the resistance (interference) from the disc member 310 is effective. Can be avoided.

Further, according to the shower head 301 of the present embodiment, the three diaphragm valves 21 to 23 are integrated as one component diaphragm member 20, and a seal ring portion 24 is provided around the three diaphragm valves 21 to 23. As a result, it is not necessary to separately provide a seal ring member (see the second embodiment described above).

Further, according to the shower head 301 of the present embodiment, the diaphragm valves 21 to 23 are urged in the closing direction by coil springs 51 to 53, respectively. As a result, the opening and closing operations of the diaphragm valves 21 to 23 are stabilized.

Even in such a configuration, the opening and closing of the three diaphragm valves (main valve body) is controlled by switching the opening and closing states of the three pilot holes by the disk member 310 (pilot valve), so grease should be used. It is possible to stably reduce the operating force of the switching operation for a long period of time.

[Modification 1 of the third embodiment]
As described above, the shower head 301 of the third embodiment is a shower head capable of switching between water discharge and water stop by the three diaphragm valves 21 to 23, and each of the three diaphragm valves 21 to 23 is The corresponding back pressure chamber outflow holes 21c to 23c and the outflow holes 44 to 46 are opened when they are communicated with each other by the communication hole 310h of the disk member 310.

Here, the back pressure chambers 21b to 23b corresponding to each of the three diaphragm valves 21 to 23 are communicated with each other, and a common back pressure chamber outflow hole is provided for the three back pressure chambers 21b to 23b. It is also possible to adopt a configuration in which only one is provided (for example, only one of the back pressure chamber outflow holes 21c to 23c is provided). (In this case, it is sufficient to provide only one corresponding outflow hole 44 to 46.)

Even in such a configuration, as in the shower head 301 of the third embodiment, if the disc member 310 evenly has, for example, six communication holes 310h in the circumferential direction by 60 degrees, the disc member 310 A water discharge mode in which only one set of back pressure chamber outflow holes and outflow holes communicate with each other by rotating by 30 degrees, and a water stop mode in which the one set of back pressure chamber outflow holes and outflow holes do not communicate with each other. And can be switched in sequence.

Water stop mode, that is, a state in which the back pressure chamber outflow hole (any one of 21c to 23c) and the outflow hole (any one of 44 to 46) do not communicate (on the right side of FIGS. 4 and 5). In the state), the water pressure in the storage chamber 5 and the water pressure in the back pressure chamber are equal to each other through the back pressure chamber inflow hole, and the urging force of the coil spring (not shown in FIGS. 4 and 5) causes the water pressure to be equal. The diaphragm valves 21 to 23 are in the closed state.

Water discharge mode, that is, a state in which the back pressure chamber outflow hole (any one of 21c to 23c) and the outflow hole (any one of 44 to 46) communicate with each other (the state on the left side of FIGS. 4 and 5). ), The water pressure in the storage chamber 5 becomes larger than the water pressure in the back pressure chamber due to the outflow of water from the back pressure chamber through the back pressure chamber outflow hole and the outflow hole, and the coil spring (in FIGS. 4 and 5). Despite the urging force (not shown), the diaphragm valves 21 to 23 are in the open state.

Even in such a configuration, the opening and closing of three diaphragm valves (main valve body) is controlled by switching the opening and closing state of one pilot hole by the disk member 310 (pilot valve), so grease should be used. It is possible to stably reduce the operating force of the switching operation for a long period of time.

[Modification 2 of the third embodiment]
Further, in the case of a shower head capable of switching between water discharge and water stoppage, only one diaphragm valve is provided instead of the three diaphragm valves 21 to 23 (for example, any of the diaphragm valves 21 to 23). It is also possible to adopt a configuration in which only one is provided, or three diaphragm valves 21 to 23 are replaced by one large diaphragm valve). (In this case, it is sufficient to provide only one corresponding valve seat 341 to 343.)

Even in such a configuration, as in the shower head 301 of the third embodiment, if the disc member 310 evenly has, for example, six communication holes 310h in the circumferential direction by 60 degrees, the disc member 310 A water discharge mode in which the back pressure chamber outflow hole and the outflow hole of only one diaphragm valve communicate with each other by rotating by 30 degrees, and a water stop mode in which the back pressure chamber outflow hole and the outflow hole do not communicate with each other. And can be switched in sequence.

In the water stop mode, that is, in the state where the back pressure chamber outflow hole and the outflow hole of only one diaphragm valve do not communicate with each other (the state on the right side of FIGS. 4 and 5), storage is performed through the back pressure chamber inflow hole. The water pressure in the chamber 5 and the water pressure in the back pressure chamber are equal to each other, and the urging force of the coil spring (not shown in FIGS. 4 and 5) causes the one diaphragm valve to be closed.

In the water discharge mode, that is, in the state where the back pressure chamber outflow hole and the outflow hole of only one diaphragm valve communicate with each other (the state on the left side of FIGS. 4 and 5), the back pressure chamber to the back pressure chamber outflow hole and When water flows out through the outflow hole, the water pressure in the storage chamber 5 becomes higher than the water pressure in the back pressure chamber, regardless of the urging force of the coil spring (not shown in FIGS. 4 and 5). Instead, only one diaphragm valve is opened.

Even in such a configuration, the opening / closing of one diaphragm valve (main valve body) is controlled by switching the opening / closing state of one pilot hole by the disk member 310 (pilot valve), so grease should be used. It is possible to stably reduce the operating force of the switching operation for a long period of time.

[Structure of Fourth Embodiment]
Next, the shower head according to the fourth embodiment of the present invention will be described with reference to FIGS. 19 to 30. As will be described later, the shower head 401 of the present embodiment independently performs an operation of switching between water discharge and water stoppage and an operation of switching a plurality of water discharge modes for the water discharge state by using two pressing buttons 411 and 511. It is a shower head that can be.

19 is a perspective view of the shower head 401 according to the fourth embodiment of the present invention, FIG. 20 is a front view of the shower head 401 of the present embodiment, and FIG. 21 is a sectional view taken along line XXI-XXI of FIG. FIG. 22 is a sectional view taken along line XXII-XXII of FIG. 21, and FIG. 23 is an exploded perspective view of the shower head 401 of the present embodiment.

As shown in FIGS. 19 to 23, the shower head 401 of the present embodiment also has a storage chamber 405 (also referred to as a cavity) in which water is supplied and stored from a water supply source (not shown) via water supply members 402 and 403. ) Is provided.

Then, as in the shower head 1 of the first embodiment, four substantially disk-shaped element members 440, 447, 448, and 449 are superposed on the water discharge surface side of the shower head 401 with respect to the storage chamber 405. The configured secondary side flow path member 404 is provided. The secondary side flow path member 404 has three (a plurality of examples) flow paths corresponding to three (a plurality of examples) water discharge modes.

Of the secondary side flow path members 404, the element member 440 facing the storage chamber 405 is formed with valve seats 441, 442, 443a, 443a raised on the storage chamber 405 side, and the valve seats 441, 442, respectively. A communication hole communicating with the corresponding flow path is provided in the center of the 443a and 443a (see also FIG. 24 described later). The two plan view bean-shaped (see FIG. 22) valve seats 441, 442 (and the corresponding flow paths) are arranged in two of the three regions evenly distributed by 120 degrees in the circumferential direction in an annular shape. The two valve seats 443a and 443a (and the corresponding flow paths) having a circular shape in a plan view (see FIG. 22) are arranged at both ends of the remaining one region of the three regions (the second described later). This is to secure the trajectory of the rod portion 512).

Diaphragm valves 421 to 423 are provided in an annular shape so as to correspond to the valve seats 441, 442, 443a, 443a in the three regions (see FIG. 23). The three diaphragm valves 421 to 423 are integrally formed as one component diaphragm member 420, but the respective diaphragm valves 421 to 423 can operate independently.

Further, a seal ring portion 424 is formed on the outer peripheral portion of the diaphragm member 420. The seal ring portion 424 is watertightly sandwiched by the upper edge portion 440a of the element member 440 and the cover member 408. On the other hand, the region on the center side of the diaphragm member 420 is supported on the upper surface of the element member 440 via the space member 438.

Further, each diaphragm valve 421 to 423 is provided with coil springs 451 to 453 (an example of an elastic member) between the lower surface of the cover member 408, and is urged in the closing direction by the coil springs 451 to 543. There is.

Further, the three diaphragm valves 421 to 423 of the present embodiment are arranged in an annular shape, and the back pressure chambers 421b to 423b of the diaphragm valves 421 to 423 and the element member 440 which is an outer space of the storage chamber 405 The pilot holes (partly formed on the lower surface side of the cover member 408, back pressure chamber outflow holes 421c to 423c) for communicating with the lower space are on the central side of the arrangement of the three diaphragm valves 421 to 423. It is centrally provided in the area of No. 1 and is opened and closed by the first disk member 410 and the second disk member 510 which function as a common pilot valve. (When there are two diaphragm valves, the pilot holes for communicating the back pressure chamber of each diaphragm valve and the space below the element member 440, which is the space outside the storage chamber 405, are the two diaphragms. It can be centrally provided in the intermediate area of the valve arrangement.)

The first disc member 410 is made of resin, is rotatably supported around its own rotation axis, and has 12 teeth 410t on the outer peripheral portion (see also FIGS. 25 to 27 described later). ).

The second disc member 510 is also made of resin, is rotatably supported around its own rotation axis, and has 12 teeth 510t on the outer peripheral portion (see also FIGS. 28 to 30 described later). ).

In the present embodiment, a disc-shaped valve fixed in the rotational direction between the first disc member 410 and the second disc member 510 with respect to the upper edge portion 440a (or the cover member 408 may be used) of the element member 440. A seat 610 is provided (movable in the axial direction in order to transmit the urging force of the coil spring 435 described later to the first disc member 410). That is, the first disc member 410 and the second disc member 510 rotate independently of the valve seat 610.

FIG. 24 is a schematic view for explaining the opening and closing of the pilot hole. Like the disc member 10 of the first embodiment, the first disc member 410 has four (a plurality of examples) communication holes 410h, and as is schematically shown in FIG. 24, the four communication holes are connected. Each of the holes 410h selectively communicates with the back pressure chamber outflow holes 421c to 423c provided in the back pressure chambers 421b to 423b of the diaphragm valves 421 to 423 according to the rotation position of the first disc member 410. The pilot holes of the diaphragm valves 421 to 423 are opened. More specifically, the pilot holes of the diaphragm valves 421 to 423 are provided in the element members 440 so as to correspond to the back pressure chamber outflow holes 421c to 423c and the back pressure chamber outflow holes 421c to 423c. Is released when it is selectively communicated by the communication hole 410h of the first disk member 410 (and the communication hole 510h of the second disk member 510 described later). The four communication holes 410h are evenly arranged by 90 degrees in the circumferential direction. The back pressure chamber outflow holes 421c to 423c and the outflow holes 444 to 446 are evenly arranged by 120 degrees in the circumferential direction.

The second disc member 510 has six communication holes 510h like the disc member 310 of the third embodiment, and as is schematically shown in FIG. 24, each of the six communication holes 510h has a communication hole 510h. , The diaphragm valves 421-423 selectively communicate with the back pressure chamber outflow holes 421c to 423c provided in the back pressure chambers 421b to 423b of the diaphragm valves 421 to 423 according to the rotation position of the disc member 510. It is designed to open the pilot hole of. More specifically, the pilot holes of the diaphragm valves 421 to 423 are provided in the element members 440 so as to correspond to the back pressure chamber outflow holes 421c to 423c and the back pressure chamber outflow holes 421c to 423c. Is released when it is selectively communicated by the communication hole 410h of the first disk member 410 and the communication hole 510h of the second disk member 510 (described above). The six communication holes 510h are evenly arranged by 60 degrees in the circumferential direction.

The disc-shaped valve seat 610 has three communication holes 610h so as to correspond to the outflow holes 444 to 446, as schematically shown in FIG. 24. That is, the communication holes 610h are evenly arranged by 120 degrees in the circumferential direction.

Further, the disc pressing member 430 will be described with reference to FIG. 24. As schematically shown in FIG. 24, the disc pressing member 430 is interposed between the lower surface of the cover member 408 and the upper surface of the second disc member 510, and is provided by a coil spring 435 which is an example of the urging means. 2 The disc member 510 is pressed in a direction away from the back pressure chamber outflow holes 421c to 423c (toward the element member 440).

Further, the back pressure chamber outflow holes 421c to 423c of the diaphragm valves 421 to 423 communicate with the communication hole 510h of the second disc member 510 through the region around the disc holding member 430. The area around the disk holding member 430 also communicates with the storage chamber 405 via a gap formed by the space member 438 or the like, that is, the gap functions as a back pressure chamber inflow hole. ing. (However, a mode in which a back pressure chamber inflow hole is provided in a part of the diaphragm valves 421 to 423 is not excluded from the scope of the present invention at the time of filing the application of the present application (see FIG. 4).

Returning to FIG. 19, a first pressing button 411 is provided in the lower portion of the shower head housing 407 as an operation unit to which the user gives an operation force. (Instead of the first pressing button 411, another type of button, a slide switch, or the like may be provided.)

With reference to FIGS. 21 to 23, the first pressing button 411 rotates around the rotation shaft 411s each time the pressing operation is performed by the user (every time the user applies a pressing force as an operating force). It has become like. Then, in conjunction with the rotation operation of the first pressing button 411, the base of the contact slide inclined portion of the first pressing button 411 (which has substantially the same configuration as the contact slide inclined portion 11a in FIG. 2) and the rod portion 412. The rod portion 412 reciprocates in the axial direction of itself by utilizing the contact (and slide) with the contact ring 412a provided at the end portion.

The tip of the rod portion 412 is exposed in the storage chamber 405 (underwater) (see also FIGS. 25 to 27), and the rod portion 412 is made of a metal rod material such as stainless steel having a property of not rusting. In the present embodiment, the rod portion 412 penetrates the element member 440 integrally fixed to the shower head housing 407 so as to be slidable and movable. A seal ring member 412s is provided to maintain watertightness. The rod portion 412 may be composed of not only a rigid body but also a plastic body such as a string or an elastic body such as rubber.

FIG. 25 is a schematic view for explaining the state of the first disc member 410 at the start of the rotational operation, and FIG. 26 is a schematic view for explaining the state of the first disc member 410 during the rotational operation. 27 is a schematic view for explaining a state at the end of the rotation operation of the first disc member 410.

As shown in FIGS. 25 to 27, a coil spring 414 is arranged around the tip of the rod portion 412 located in the storage chamber 405. The base end of the coil spring 414 is fixed to the element member 440, thereby being fixed to the shower head housing 407 (to the rotating shaft 411s of the first pressing button 411).

A claw member 415 is fixed to the tip of the coil spring 414, a stopper 413 for the claw member 415 is attached to the tip of the rod portion 412, and the tip of the coil spring 414 and the claw member 415 are the coil spring 414. Due to the deformation in the axial direction of, the stopper 413 can be moved in the axial direction in the region on the proximal end side of the rod portion 412.

Further, the tip of the coil spring 414 and the claw member 415 can be moved (posture changeable) in the inclined direction by the deformation of the coil spring 414 in the inclined direction with respect to the axial direction.

A claw 415t that engages with the teeth 410t of the first disc member 410 is provided on the side surface of the claw member 415 on the side of the first disc member 410. Then, while the rod portion 412 is moving, the claw 415t pulls in the teeth 410t, so that the first disc member 410 is rotated (FIG. 25 → FIG. 26 → FIG. 27).

In addition, a stop claw 416 for preventing the first disc member 410 (teeth 410t) from rotating in the opposite direction is held by the element member 440 (or cover member 408).

Further, in the present embodiment, as shown in FIG. 19, a second pressing button 511 as an operation unit for giving an operation force by the user is also provided in the lower portion of the shower head housing 407. (Instead of the second pressing button 511, another type of button, a slide switch, or the like may be provided.)

With reference to FIGS. 21 to 23 again, the second pressing button 511 also has a rotating shaft 511s (this embodiment) for each pressing operation by the user (every time the user applies a pressing force as an operating force). (It also serves as the rotation shaft 411s). Then, in conjunction with the rotation operation of the second pressing button 511, the contact slide inclined portion of the second pressing button 511 (which has substantially the same configuration as the contact slide inclined portion 11a in FIG. 2) and the base of the rod portion 512 are used. The rod portion 512 reciprocates in the axial direction of itself by utilizing the contact (and slide) with the contact ring 512a provided at the end portion.

In the present embodiment, the two rod portions 412 and 512 are arranged substantially at the same height as the upper surface of the element member 440 and substantially parallel to each other (see FIG. 22).

The tip of the rod portion 512 is also exposed in the storage chamber 405 (underwater) (see also FIGS. 28 to 30), and is made of a metal rod material such as stainless steel having a property of not rusting. In the present embodiment, the rod portion 512 also penetrates the element member 440 integrally fixed to the shower head housing 407 so as to be slidable and movable. A seal ring member 512s is provided to maintain watertightness. The rod portion 512 may also be composed of not only a rigid body but also a plastic body such as a string or an elastic body such as rubber.

FIG. 28 is a schematic view for explaining a state at the start of the rotation operation of the second disc member 510, and FIG. 29 is a schematic view for explaining a state of the second disc member 510 during the rotation operation. FIG. 30 is a schematic view for explaining a state at the end of the rotation operation of the second disc member 510.

As shown in FIGS. 28 to 30, the coil spring 514 is also arranged around the tip of the rod portion 512 located in the storage chamber 405. The base end of the coil spring 514 is fixed to the element member 440, thereby being fixed to the shower head housing 407 (relative to the rotation shaft 511s of the second pressing button 511).

A claw member 515 is also fixed to the tip of the coil spring 514, a stopper 513 for the claw member 515 is attached to the tip of the rod portion 512, and the tip of the coil spring 514 and the claw member 515 are the coil spring 514. Due to the deformation in the axial direction of the above, the stopper 513 can be moved in the axial direction in the region on the proximal end side of the rod portion 512.

Further, the tip of the coil spring 514 and the claw member 515 can be moved (posture changeable) in the inclined direction by the deformation of the coil spring 514 in the inclined direction with respect to the axial direction.

The tip region of the claw member 515 extends upward in order to compensate for the offset in the height direction between the first disc member 410 and the second disc member 510, and is on the second disc member 510 side of the extension region. A claw 515t that engages with the teeth 510t of the second disc member 510 is provided on the side surface (see FIG. 23). Then, while the rod portion 512 is moving, the claw 515t pulls in the teeth 510t, so that the second disc member 510 is rotated (FIG. 28 → FIG. 29 → FIG. 30).

In addition, a stop claw 516 that prevents the second disc member 510 (teeth 510t) from rotating in the opposite direction is held by the element member 440 (or the cover member 408).

[Action of Fourth Embodiment]
Next, the operation of the shower head 401 according to the present embodiment will be described.

With reference to FIG. 19, when the first pressing button 411 is pressed by the user, the pressing force (operating force) causes the abutting slide inclined portion of the first pressing button 411 to rotate around the rotation shaft 411s. It moves and moves the rod portion 412 in the axial direction toward the base end side (lower side in FIG. 22) via the contact ring 412a.

The state of FIG. 25 corresponds to the state before the pressing operation. When the movement of the rod portion 412 starts from this state, as shown in FIG. 26, the first disc member 410 is rotated so that the claw 415t of the claw member 415 pulls in the teeth 410t of the first disc member 410. FIG. 27 corresponds to a state in which the first pressing button 411 is at the innermost part and the rod portion 412 is moved to the most proximal side (lower side of FIG. 22). In the state of FIG. 27, the stop claw 416 stops the tooth 410t one step ahead of the state of FIG. 25. As described above, the first disc member 410 is rotated by 30 degrees by one pressing operation of the first pressing button 411.

In the state of FIG. 27, the coil spring 414 is compressed between the stopper 413 at the tip of the rod portion 412, the claw member 415, and the element member 440. In this state, when the pressing force on the first pressing button 411 is released, the rod portion 412 and the first pressing button 411 are returned to their original positions (the state shown in FIG. 25) by the restoring force of the coil spring 414. In this process, the claw 415t is not engaged with the tooth 410t, and the first disc member 410 does not rotate in the reverse direction due to the presence of the stop claw 416. Further, in this process, since the claw member 415 can move in the inclined direction (posture can be changed) due to the deformation of the coil spring 414 in the inclined direction with respect to the axial direction, the claw member 415 can be moved from the first disk member 410. Resistance (interference) can be effectively avoided. Then, when the claw member 415 returns to the original position (state in FIG. 25), the claw member 415 engages with the tooth 410t next to the tooth previously pulled in by the restoring force of the coil spring 414.

As described above, the four communication holes 410h are evenly arranged by 90 degrees in the circumferential direction, and the back pressure chamber outflow holes 421c to 423c and the outflow holes 444 to 446 are evenly arranged by 120 degrees in the circumferential direction. Has been done. Therefore, when the communication hole 510h of the second disk member 510 is located at a position corresponding to the outflow holes 44, 45, 46 (and the communication hole 610h of the valve seat), the first disk member 410 is rotated by 30 degrees, whereby the communication hole 510h is rotated by 30 degrees. The first water discharge mode in which the back pressure chamber outflow hole 421c and the outflow hole 444 communicate with each other and the back pressure chamber outflow hole 422c and 423c do not communicate with the outflow hole 445 and 446, and the back pressure chamber outflow hole 422c and the outflow hole 445. The back pressure chamber outflow hole 421c, 423c and the outflow hole 444, 446 communicate with each other in the second water discharge mode, and the back pressure chamber outflow hole 423c and the outflow hole 446 communicate with each other to form the back pressure chamber outflow hole 421c. The third water discharge mode in which the 422c and the outflow holes 444 and 445 do not communicate with each other can be sequentially switched.

An example of a state in which the back pressure chamber outflow hole and the outflow hole do not communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is not opened is the state on the right side of FIG. 24. In the state on the right side of FIG. 24, the back pressure chamber outflow holes 422c and 423c and the outflow holes 445 and 446 are blocked by the first disc member 410. On the other hand, the water pressure in the storage chamber 405 and the water pressure in the back pressure chambers 423b and 423c are equal to each other through the back pressure chamber inflow hole. Therefore, the diaphragm valves 422 and 423 are closed by the urging force of the coil springs 452 and 453 (not shown in FIG. 24).

On the other hand, an example of a state in which the back pressure chamber outflow hole and the outflow hole communicate with each other, that is, the pilot hole of the corresponding diaphragm valve is opened is the state on the left side of FIG. 24. In the state on the left side of FIG. 24, the back pressure chamber outflow hole 421c and the outflow hole 444 are communicated (opened) by the communication hole 410h of the first disc member 410. In this state, water flows out from the back pressure chamber 421b through the back pressure chamber outflow hole 421c and the outflow hole 444, so that the water pressure in the storage chamber 405 becomes larger than the water pressure in the back pressure chamber 421b, and the coil spring 451 The diaphragm valve 421 is in the open state despite the urging force (not shown in FIG. 24).

Then, in the shower head 401 of the present embodiment, in addition to switching a plurality of water discharge modes by operating the first pressing button 411, switching between water stoppage and water discharge by operating the second pressing button 511. be able to.

That is, referring to FIG. 19, when the second pressing button 511 is pressed by the user, the pressing force (operating force) causes the contact slide inclined portion of the second pressing button 511 to rotate around the rotation shaft 511s. The rod portion 512 is moved to the base end side (lower side in FIG. 22) in the axial direction via the contact ring 512a.

The state of FIG. 28 corresponds to the state before the pressing operation. When the movement of the rod portion 512 starts from this state, the second disc member 510 is rotated so that the claw 515t of the claw member 515 pulls in the teeth 510t of the second disc member 510, as shown in FIG. 29. FIG. 30 corresponds to a state in which the second pressing button 511 is at the innermost part and the rod portion 512 is moved to the most proximal side (lower side of FIG. 22). In the state of FIG. 30, the stop claw 516 stops the tooth 510t one step ahead of the state of FIG. 28. As described above, the second disc member 510 is rotated by 30 degrees by one pressing operation of the second pressing button 511.

In the state of FIG. 30, the coil spring 514 is in a state of being compressed between the stopper 513 and the claw member 515 at the tip of the rod portion 512 and the element member 440. In this state, when the pressing force on the second pressing button 511 is released, the rod portion 512 and the second pressing button 511 are returned to their original positions (the state shown in FIG. 28) by the restoring force of the coil spring 514. In this process, the claw 515t is not engaged with the tooth 510t, and the second disc member 510 does not rotate in the reverse direction due to the presence of the stop claw 516. Further, in this process, since the claw member 515 can move in the inclined direction (posture can be changed) by the deformation of the coil spring 514 in the inclined direction with respect to the axial direction, the claw member 515 can be moved from the second disk member 510. Resistance (interference) can be effectively avoided. Then, when the claw member 515 returns to the original position (state in FIG. 28), the claw member 515 engages with the tooth 510t next to the tooth previously pulled in by the restoring force of the coil spring 514.

As described above, the six communication holes 510h are evenly arranged by 60 degrees in the circumferential direction, and the back pressure chamber outflow holes 421c to 423c and the outflow holes 444 to 446 are evenly arranged by 120 degrees in the circumferential direction. Has been done. Therefore, the back pressure chamber outflow hole and outflow hole and the communication hole 510h of the second disc member 510 communicate with each other by rotating the second disc member 510 by 30 degrees, and the back pressure chamber outflow hole and outflow hole. And the water stop mode in which the communication hole 510h of the second disc member 510 does not communicate with each other can be sequentially switched.

[Effect of Fourth Embodiment]
As described above, according to the shower head 401 of the present embodiment, the three diaphragm valves 4421 to 423 control the communication or interruption between each of the three flow paths and the storage chamber 405, so that the flow path can be connected. It is possible to realize a remarkable reduction in the operating force of the switching operation.

In particular, according to the shower head 401 of the present embodiment, the operation of switching between water discharge and water stoppage and the operation of switching between a plurality of water discharge modes for the water discharge state are independently performed by using the two pressing buttons 411 and 511. Excellent operability.

Further, according to the shower head 401 of the present embodiment, the diaphragm is provided with a pilot hole for communicating the back pressure chambers 421b to 423b of the three diaphragms 421 to 423 arranged in a ring shape with the space outside the storage chamber 405. The shower head 401 can be downsized because it is centrally provided in the area on the central side of the arrangement of the valves 421 to 423 and is opened and closed by the common first disk member 410 and the second disk member 510 (pilot valve). This can be realized, and the moving range (moving distance) of the first disc member 410 and the second disc member 510 (pilot valve) may be small, so that the operating force can be further reduced.

Further, according to the shower head 401 of the present embodiment, the first disc member 410 is rotatably supported around its own rotation axis and has teeth 410t on the outer peripheral portion. Therefore, the first disc member 410 can be easily rotationally driven by using the teeth 410t.

Further, according to the shower head 401 of the present embodiment, since the first disc member 410 is made of resin, high smoothness can be easily realized. Therefore, the sliding resistance can be suppressed, and it is not necessary to separately provide a sealing member.

Further, according to the shower head 401 of the present embodiment, the first disc member 410 has four communication holes 410h, and each of the communication holes 410h corresponds to the rotation position of the first disc member 410. Therefore, the pilot holes of the diaphragm valves 421 to 423 are released by selectively communicating with the back pressure chamber outflow holes 421c to 423c provided in the back pressure chambers 421b to 423b of the three diaphragm valves 421 to 423. It has become. As a result, the shower head 401 can be further miniaturized, and the rotation angle (moving distance) of the first disc member 410 is as small as 30 degrees, so that the operating force can be further reduced.

Similarly, according to the shower head 401 of the present embodiment, the second disc member 510 is rotatably supported around its own rotation axis and has teeth 510t on the outer peripheral portion. Therefore, the second disc member 510 can be easily rotationally driven by using the teeth 510t.

Further, according to the shower head 401 of the present embodiment, since the second disc member 510 is made of resin, high smoothness can be easily realized. Therefore, the sliding resistance can be suppressed, and it is not necessary to separately provide a sealing member.

Further, according to the shower head 401 of the present embodiment, the second disc member 510 has six communication holes 510h, and each of the communication holes 510h corresponds to the rotation position of the second disc member 510. The pilot holes of the diaphragm valves 421 to 423 are released by selectively communicating with the back pressure chamber outflow holes 421c to 423c provided in the back pressure chambers 421b to 423b of the three diaphragm valves 421 to 423. It has become. As a result, the shower head 401 can be further miniaturized, and the rotation angle (moving distance) of the second disc member 510 is as small as 30 degrees, so that the operating force can be further reduced.

Further, according to the shower head 401 of the present embodiment, the disc pressing member 430 is interposed between the back pressure chamber outflow holes 421c to 423c and the second disc member 510, and the disc pressing member 430 is a coil spring 435. The second disc member 510, the valve seat 610, and the first disc member 410 are pressed in a direction away from the back pressure chamber outflow holes 421c to 423c. As a result, it is not necessary to provide a seal member between the member (element member 440) on the side opposite to the back pressure chamber outflow holes 421c to 423c and the first disc member 410 with respect to the first disc member 410.

Further, according to the shower head 401 of the present embodiment, the gap formed by the space member 438 or the like and leading to the area around the disc pressing member 430 functions as the back pressure chamber inflow hole. Since the gap can be easily formed with high dimensional accuracy, it is possible to effectively suppress the variation in the characteristics of the back pressure chamber inflow hole (gap) between the plurality of diaphragm valves 21 to 23. ..

Further, according to the shower head 401 of the present embodiment, the first pressing button 411 to which the user gives an operating force and the rod portion that reciprocates in the axial direction of the first pressing button 411 each time the pressing operation of the first pressing button 411 is performed. By a drive mechanism including a 412 and a claw member 415 having a claw 415t attached to the tip end side of the rod portion 412 and engaging with the teeth 410t of the first disc member 410, the claw 415t during the movement of the rod portion 412. The first disc member 410 is rotated by pulling in the teeth 410t. By applying a force in the pulling direction in this way, it is possible to effectively prevent the rod portion 412 from buckling and deforming, and it is possible to reduce the rigidity required for the rod portion 412. As a result, the rod portion 412 can be formed not only by a rigid body but also by a string-shaped plastic body or an elastic body such as rubber.

In particular, according to the shower head 401 of the present embodiment, the base end of the rod portion 412 is connected to the first pressing button 411, and the coil spring 414 is arranged around the tip portion of the rod portion 412, and the coil spring 414 is arranged. The base end is fixed to the element member 440, the tip of the coil spring 414 is fixed to the claw member 415, and the stopper 413 for the claw member 415 is attached to the tip of the rod portion 412. As a result, the claw member 415 is movable relative to the rod portion 412 due to the deformation of the coil spring 414 (the axial direction and the direction inclined with respect to the axial direction). Therefore, when the claw member 415 after pulling in the tooth 410t returns to the original position (position in FIG. 25) in order to engage with the next tooth 410t, the resistance (interference) from the first disk member 410 is generated. It can be effectively avoided.

Similarly, according to the shower head 401 of the present embodiment, the second pressing button 511 to which the user gives an operating force and the second pressing button 511 reciprocate in its own axial direction each time the pressing operation is performed. During the movement of the rod portion 512 by a drive mechanism including a rod portion 512 and a claw member 515 having a claw 515t attached to the tip end side of the rod portion 512 and engaging with the teeth 510t of the second disc member 510. The second disc member 510 is rotated by the claws 515t pulling in the teeth 510t. By applying a force in the pulling direction in this way, it is possible to effectively prevent the rod portion 512 from buckling and deforming, and it is possible to reduce the rigidity required for the rod portion 512. As a result, the rod portion 512 can be formed not only by a rigid body but also by a string-shaped plastic body or an elastic body such as rubber.

In particular, according to the shower head 401 of the present embodiment, the base end of the rod portion 512 is connected to the second pressing button 511, and the coil spring 514 is arranged around the tip portion of the rod portion 512, and the coil spring 514 The base end is fixed to the element member 440, the tip of the coil spring 514 is fixed to the claw member 515, and the stopper 513 for the claw member 515 is attached to the tip of the rod portion 512. As a result, the claw member 515 can move relative to the rod portion 512 due to the deformation of the coil spring 514 (the axial direction and the direction inclined with respect to the axial direction). Therefore, when the claw member 515 after pulling in the tooth 510t returns to the original position (position in FIG. 28) in order to engage with the next tooth 510t, the resistance (interference) from the second disk member 510 is generated. It can be effectively avoided.

Further, according to the shower head 401 of the present embodiment, the three diaphragm valves 421 to 423 are integrated as one component diaphragm member 420, and a seal ring portion 24 is provided around the three diaphragm valves 421 to 423. As a result, it is not necessary to separately provide a seal ring member (see the second embodiment described above).

Further, according to the shower head 401 of the present embodiment, the diaphragm valves 421 to 423 are urged in the closing direction by the coil springs 451 to 453, respectively. As a result, the opening and closing operations of the diaphragm valves 421 to 423 are stabilized.

[Supplementary information on flow path patterns]
Also in the shower head 401 of the fourth embodiment, the opening and closing of each of the three diaphragm valves 421 to 423 corresponds to 1: 1 for the communication / blocking of each of the three flow paths of the secondary side flow path member 404. Therefore, depending on the rotational position of the first disk member 410, only one of the diaphragm valves is opened, that is, only one of the flow paths is communicated with the present invention. Is not limited to such an embodiment.

For example, by changing the arrangement pattern of the communication holes 410h of the first disc member 410, a plurality of diaphragm valves are opened at the same time according to the rotation position of the first disc member 410, that is, a plurality of flow paths are simultaneously opened. Water may be discharged in a complex manner through communication.

Alternatively, even if a plurality of flow paths are communicated at the same time and water is discharged in a complex manner when one diaphragm valve is opened by changing the flow path pattern of the secondary side flow path member 404 or the like. Good.

1 Shower head 2 Water supply member 3 Water supply member 4 Secondary side flow path member 5 Storage chamber 7 Shower head housing 8 Cover member 10 Disc member 10h Communication hole 10t Tooth 11 Press button 11a Abutment slide tilted portion 11s Rotating shaft 12 Rod Part 12a Abutment ring 12s Seal ring member 13 Stopper 14 Coil spring 15 Claw member 15t Claw 16 Stop claw 17 Stop claw fixing part 20 Diaphragm member 21 Diaphragm valve 21b Back pressure chamber 21c Back pressure chamber outflow hole 21d Back pressure chamber inflow hole 22 Diaphragm Valve 22b Back pressure chamber 22c Back pressure chamber outflow hole 22d Back pressure chamber inflow hole 23 Diaphragm valve 23b Back pressure chamber 23c Back pressure chamber outflow hole 23c Back pressure chamber 23d Back pressure chamber inflow hole 24 Seal ring part 30 Disc holding member 31 Tubular Part 31c Outflow communication passage 32 Tubular part 32c Outflow communication passage 33 Tubular part 33c Outflow communication passage 35 Coil spring 38 Space member 40 Element member 40a Upper edge 41 Valve seat 42 Valve seat 43 Valve seat 44 Outflow hole 45 Outflow hole 46 Outflow hole 47 Element member 48 Element member 49 Element member 51 Coil spring 52 Coil spring 53 Coil spring 101 Shower head 102 Water supply member 103 Water supply member 104 Secondary side flow path member 105 Storage chamber 107 Shower head housing 108 Cover member 108a Cover body 108b Upper disk 108c Upper disk 110 Disc member 110h Communication hole 110t Tooth 111 Press button 111a Abutment slide Inclination 111s Rotation shaft 112 Rod 112a Abutment ring 112s Seal ring member 113 Stopper 114 Coil spring 115 Claw member 115t Claw 116 Stop claw 117 Stop claw fixing part 121 Diaphragm valve 121b Back pressure chamber 121c Back pressure chamber outflow hole 121d Back pressure chamber inflow hole 122 Diaphragm valve 122b Back pressure chamber 122c Back pressure chamber outflow hole 122d Back pressure chamber inflow hole 123 Diaphragm valve 123b Back pressure chamber 123c Back pressure chamber outflow hole 123d Back pressure chamber inflow hole 124 Seal ring member 130 Disc holding member 131 Tubular part 131c Outflow communication passage 132 Tubular part 132c Outflow communication passage 133 Tubular part 133c Outflow communication passage 135 Coil spring 140 Element member 140a Upper edge 141 Valve seat 142 Valve seat 143 Valve seat 144 Outflow hole 145 Outflow hole 146 Outflow hole 147 Element member 148 Element member 149 Element member 151 Coil spring 152 Koi Lubane 153 Coil spring 161 Central spout member 162 Central spout member 163 Central spout member 165 Seal member 171 Space member 172 Space member 173 Space member 301 Shower head 304 Secondary side flow path member 310 Disk member 310h Communication hole 310t Tooth 341 valve Seat 342 Valve seat 343 Valve seat 401 Shower head 402 Water supply member 403 Water supply member 404 Secondary side flow path member 405 Storage chamber 407 Shower head housing 408 Cover member 410 First disk member 410h Communication hole 410t Teeth 411 First pressing button 411a Contact slide inclined part 411s Rotating shaft 412 Rod part 412a Contact ring 412s Seal ring member 413 Stopper 414 Coil spring 415 Claw member 415t Claw 416 Stop claw 420 Diaphragm member 421 Diaphragm valve 421b Back pressure chamber 421c Back pressure chamber outflow hole 422 Valve 422b Back pressure chamber 422c Back pressure chamber outflow hole 423 Diaphragm valve 423b Back pressure chamber 423c Back pressure chamber outflow hole 424 Seal ring part 430 Disc holding member 435 Coil spring 438 Space member 440 Element member 440a Upper edge part 441 Valve seat 442 Valve seat 443a Valve seat 443b Valve seat 444 Outflow hole 445 Outflow hole 446 Outflow hole 447 Element member 448 Element member 449 Element member 451 Coil spring 452 Coil spring 453 Coil spring

Claims (14)

A shower head that has a flow path that guides water to multiple spouts.
A plurality of main valves supported in the flow path so as to be displaceable,
Adjacent to each of the plurality of main valve bodies on the upstream side of the flow path, accommodating water supplied from the upstream side of the flow path, and utilizing the pressure of the water, the plurality of main valve bodies. With multiple back pressure chambers that urge each valve in the closing direction,
A plurality of pilot holes communicating with the downstream side of the flow path and each of the plurality of back pressure chambers,
A pilot valve that selectively controls the open / closed state of the plurality of pilot holes,
An operation unit that switches the open / closed state of the plurality of pilot holes by the pilot valve by the operation of the user, and
Equipped with a,
The pilot valve has a plurality of communication holes and has a plurality of communication holes.
Each of the plurality of communication holes selectively communicates with the back pressure chamber outflow hole provided in the back pressure chamber of each main valve body.
The shower head according to the description, characterized in that the pilot hole of the main valve body is opened by passing the shower head. It is possible to switch between multiple water discharge modes ,
A storage room where water from the water supply source is stored, and
A secondary side flow path member provided on the water discharge surface side of the shower head with respect to the storage chamber and having a plurality of flow paths corresponding to the plurality of water discharge modes.
Further comprising a,
Said plurality of main valve body, wherein the a plurality of diaphragm valves, characterized by going on <br/> possible to control the communication or blocking between the storage chamber and each of said plurality of channels Item 1. The shower head according to item 1 . The plurality of diaphragm valves are two diaphragm valves.
Pilot holes for communicating the back pressure chamber of each diaphragm valve with the space outside the storage chamber are centrally provided in the region on the intermediate side of the arrangement of the two diaphragm valves, and are provided by a common pilot valve. The shower head according to claim 2 , wherein the shower head is opened and closed. The plurality of diaphragm valves are three or more diaphragm valves arranged in an annular shape.
Pilot holes for communicating the back pressure chamber of each diaphragm valve with the space outside the storage chamber are centrally provided in the central region of the arrangement of the three or more diaphragm valves, and are common pilot valves. The shower head according to claim 2 , wherein the shower head is opened and closed by. The shower head according to claim 3 or 4 , wherein the common pilot valve is configured as a disc member rotatably supported around its own rotation axis and has teeth on the outer peripheral portion. .. The shower head according to claim 5 , wherein the disc member is made of resin. The disk member has a plurality of communication holes and has a plurality of communication holes.
Each of the plurality of communication holes selectively communicates with the back pressure chamber outflow hole provided in the back pressure chamber of each diaphragm valve according to the rotation position of the disc member, thereby forming the pilot hole of the diaphragm valve. The shower head according to claim 5 or 6 , wherein the shower head is designed to be released. A disc holding member is interposed between the back pressure chamber outflow hole and the disc member.
The disc holding member is provided with an outflow communication passage that communicates with the back pressure chamber outflow hole of each diaphragm valve.
The shower head according to claim 7 , wherein the disc pressing member is adapted to press the disc member in a direction away from the back pressure chamber outflow hole by an urging means. Each outflow passage is composed of a tubular part,
Each tubular portion is inserted into the corresponding back pressure chamber outflow hole.
A gap remains between each tubular portion and the back pressure chamber outflow hole.
The shower head according to claim 8 , wherein the gap functions as a back pressure chamber inflow hole. The operation unit that the user gives the operation force,
A rod unit that reciprocates in its own axial direction each time the operation unit is operated,
A claw member having a claw attached to the tip end side of the rod portion and engaging with the teeth of the disc member,
With more
The shower head according to claim 5 , wherein the disc member is rotated by pulling the teeth by the claws while the rod portion is moving. The base end of the rod portion is connected to the operation portion.
A coil spring is arranged around the rod portion.
The base end of the coil spring is fixed to the shower head housing.
The tip of the coil spring is fixed to the claw member and
A stopper for the claw member is attached to the tip of the rod portion.
The shower head according to claim 10 , wherein the claw member is movable relative to the rod portion by deformation of the coil spring. The shower head according to any one of claims 2 to 11 , wherein the plurality of diaphragm valves are integrated as a single diaphragm member. The shower head according to claim 12 , wherein the diaphragm member has a seal portion around the diaphragm member. The shower head according to any one of claims 2 to 13 , wherein each diaphragm valve is urged in a closing direction by an elastic member.

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