JP2015181557A - shower head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shower head in which, in a case where a faucet is closed when a valve body is at a valve closing position, the valve body automatically moves to a valve opening position so that water spraying can be always performed when the faucet is opened next time.SOLUTION: A shower head includes energization means for always energizing a valve body to a valve opening position side, and release means for releasing an upstream water pressure. If a faucet is closed when the valve body is at a valve closing position, the upstream water pressure is lowered by the release means, and when the water pressure becomes lower than a threshold value, the valve body is moved from the valve closing position to the valve opening position by energization force of the energization means.

Description

  The present invention relates to a shower head having a temporary water stop function.

  Conventionally, in a shower head used in a bathroom of a general household or a hotel, a hot spring, a bathhouse, etc., the shower head itself is provided with a water stop valve, and when the faucet is opened, the water passage state and the water stop state are There is known a shower head capable of switching between (see, for example, Patent Documents 1 and 2). The faucet is a main plug of the shower head.

  Such a shower head includes a valve body that opens and closes a valve hole and an operation element for moving the valve body between a valve opening position and a valve closing position. And in the shower head, when the valve element is moved to the valve open position by the operation element, the water is passed and water is sprinkled (water discharged), and when the valve element is moved to the valve closing position by the operation element. The water will stop and watering will be stopped.

JP-A-11-104524 JP 2000-166798 A

  However, the above-described conventional shower head has a problem in that water spraying is not performed if the faucet is closed in a water-stopped state and then the water-stopper is opened again when the faucet is opened again. . That is, even if the user desires to spray water from the shower head by opening the faucet, there may be a case where water is not sprayed. As described above, when the faucet is opened in the water-stopped state, it is inconvenient because the user needs to switch the water-operated state by operating the operation element.

  The present invention is based on the above circumstances, and when the faucet is closed when the valve body is in the valve closing position, the valve body automatically moves to the valve opening position, so that the water faucet is restored. The aim is to provide a shower head that can be watered whenever it is opened.

  In order to solve the above problem, the invention according to claim 1 is a shower head capable of switching between a water flow state and a water stop state when the faucet is opened, A valve hole formed in a partition wall partitioning the downstream side, a valve body disposed on the upstream side of the partition wall, opening and closing the valve hole, and the valve body between the valve opening position and the valve closing position. An operation element for moving, an urging means for always urging the valve body toward the valve opening position, and a release means for releasing the water pressure upstream of the partition wall, and the faucet is opened. Even if the operation of the operation element is released when the valve element is moved from the valve opening position to the valve closing position by operating the operation element in the The valve body is maintained in the closed position by water pressure on the side, and the faucet is opened. When the faucet is closed from the state where the valve body is maintained at the valve closing position, the water pressure on the upstream side of the partition wall is reduced by the release means, and the water pressure is lower than the first threshold value. The shower head is configured to move the valve element from the valve closing position to the valve opening position by the urging force of the urging means when the pressure decreases.

  The invention according to claim 2 is the shower head according to claim 1, wherein the release means includes a release passage communicating the upstream side and the downstream side of the partition wall.

  According to a third aspect of the present invention, the release means opens when the release passage communicating the upstream side and the downstream side of the partition wall and the water pressure on the upstream side of the partition wall are lower than a second threshold value. When the faucet is closed from the state where the faucet is opened, the release valve is closed, and the valve body is maintained in the valve closing position, When the water pressure on the upstream side of the partition wall is reduced by the release passage, and the water pressure is lower than the second threshold value, the water pressure is rapidly reduced by opening the release valve, and the water pressure is reduced. 2. The valve body is configured to be moved from the valve closing position to the valve opening position by an urging force of the urging means when the pressure is lower than the first threshold value. It is a shower head as described in.

  The invention according to claim 4 is provided with a safety valve for absorbing a water hammer, and the release passage is provided in the safety valve. The shower head according to claim 2 or claim 3, is there.

  According to a fifth aspect of the present invention, the operation element is connected to a shaft member, is configured to be rotatable about the shaft member, and is disposed on one side with respect to the shaft member. The open operation part includes a closing operation part disposed on the other side with respect to the shaft member, and the opening operation part is longer than the closing operation part. It is a shower head as described in any one of.

  The invention according to claim 6 is provided with a contact portion on which the valve body or a lever holding the valve body collides when the valve body is moved from the valve closing position to the valve opening position. The shower head according to any one of claims 1 to 5, wherein the shower head is provided.

  In claim 1, the valve opening position is a position where the valve element opens the valve hole, and the valve closing position is a position where the valve element closes the valve hole. Further, the water flow state is a state in which the water supplied from the faucet can pass through the valve hole when the valve body is located at the valve open position. The water stop state is a state in which water supplied from the faucet cannot pass through the valve hole when the valve body is located at the valve closing position. Moreover, a 1st threshold value is a preset value, and is a value lower than the water pressure (water supply original pressure) supplied from a faucet. Further, the cancellation of the operation on the operation element means that the user's finger is released from the operation element.

  Further, in claim 3, the fact that the water pressure is rapidly reduced by opening the release valve means that the degree of decrease in the water pressure is larger than when the water pressure is reduced by the release passage. . The second threshold is a preset value, which is higher than the first threshold and lower than the water pressure supplied from the faucet (water supply pressure).

  Further, in claim 4, the water hammer is a phenomenon in which high water pressure is generated on the upstream side of the partition wall due to the inertia of water when the water passage state is switched to the water stop state.

  According to the first aspect of the present invention, when the faucet is closed when the valve body is in the valve closing position, the water pressure on the upstream side of the partition wall can be reduced by the releasing means. For this reason, when the water pressure falls below the first threshold value, the valve body can be moved from the valve closing position to the valve opening position by the biasing force of the biasing means. As a result, when the faucet is closed when the valve body is in the valve closing position, the valve body automatically moves to the valve opening position so that water can be sprayed whenever the faucet is opened next time. .

  According to the second aspect of the present invention, the water pressure on the upstream side of the partition wall can be easily reduced by the release passage.

  According to the third aspect of the present invention, the water pressure on the upstream side of the partition wall can be reduced in a short time by opening the release valve. Thereby, a valve body can be returned to a valve opening position at an early stage.

  According to invention of Claim 4, compared with the case where a cancellation | release channel | path is provided in a partition wall, it can make it easy to shape | mold a shower head.

  According to the fifth aspect of the present invention, the opening operation can be made easier to apply force to the valve body than the closing operation, so that the valve body to which the water pressure on the upstream side of the partition wall is applied is opened. It can be easily moved to a position.

  According to the sixth aspect of the present invention, when the faucet is closed and the valve body automatically moves to the valve open position, a collision sound is generated when the lever or the valve body collides with the contact portion. The user can know that the valve body has been returned to the valve open position by the collision sound.

It is the schematic which showed the whole structure of the shower head by 1st embodiment of this invention. It is sectional drawing which showed the water stop valve unit of the shower head of FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is sectional drawing which showed the safety valve of the water stop valve unit of FIG. It is sectional drawing which showed the state which the water stop valve unit of FIG. 4 opened. It is sectional drawing which showed the water stop valve unit by 2nd embodiment of this invention. It is sectional drawing which showed the water stop valve unit by 3rd embodiment of this invention.

  Hereinafter, embodiments of the shower head according to the present invention will be described in detail with reference to FIGS. 1 to 8. Note that the embodiments described below are preferred specific examples for carrying out the present invention, and thus various technical limitations are made. However, the present invention particularly limits the invention in the following description. Unless otherwise specified, the present invention is not limited to these forms.

(First embodiment)
The shower head 100 according to the first embodiment shown in FIGS. 1 to 6 is used, for example, in a bathroom such as a general home or a hotel, a hot spring, a bathhouse, or the like. The shower head 100 is connected to a faucet 50 which is a main plug, and is configured to sprinkle water or hot water (hereinafter simply referred to as “water”) supplied from the faucet 50. And the shower head 100 has a temporary water stop function, and when the faucet 50 is opened, it can be switched between a water flow state and a water stop state.

-Shower head structure-
Specifically, as shown in FIG. 1, the shower head 100 includes a head portion 1, a grip portion 2, and a water stop valve unit 3 disposed between the head portion 1 and the grip portion 2. Yes.

  The head portion 1 has a water passage formed therein, and is provided with a water spray plate 1a at one end portion (downstream end portion). The water spray plate 1a has a large number of small holes, and is formed so as to spray water (spout) from the small holes. A water stop valve unit 3 is attached to the other end (upstream end) of the head portion 1.

  The grip portion 2 is formed in a cylindrical shape and has a water passage inside. As for this grip part 2, the water stop valve unit 3 is attached to one end part (downstream end part), and the other end part (upstream end part) is connected to the faucet 50 through the water passage 51 of the hose. Has been.

  The water stop valve unit 3 includes a cylindrical main body 31 as shown in FIG. A spiral groove 31a is formed at one end (downstream end) on the inner peripheral surface of the main body 31, and the head 1 is screwed into the spiral groove 31a. A spiral groove 31b is formed on the inner peripheral surface of the main body 31 at the other end (upstream end), and the grip portion 2 is screwed into the spiral groove 31b. In addition, the main body 31 is provided with a partition wall 31e that partitions the downstream water passage 31c and the upstream water passage 31d. The main body 31 is made of, for example, a synthetic resin.

  Further, as shown in FIGS. 2 to 5, the water stop valve unit 3 includes a valve hole 32, a ball valve 33, a switch 34, a torsion spring 35, and a release passage 36, thereby temporarily stopping water. A valve is configured. 2 to 5 show a state in which the ball valve 33 is located at the valve closing position.

  The valve hole 32 is formed in the partition wall 31e, and is formed so as to communicate the downstream water passage 31c and the upstream water passage 31d. That is, the valve hole 32 is formed so as to penetrate the partition wall 31e in the thickness direction. A valve seat 32 a such as an O-ring is provided on the upstream side of the valve hole 32.

  The ball valve 33 is disposed on the upstream side of the partition wall 31e and is provided to open and close the valve hole 32. Specifically, the ball valve 33 moves between a valve closing position where the ball valve 33 is seated on the valve seat 32a and closes the valve hole 32, and a valve opening position which is separated from the valve seat 32a and opens the valve hole 32. It is configured to be possible. The ball valve 33 is an example of the “valve element” in the present invention.

  The ball valve 33 is held by a bottomed cylindrical holding portion 37a provided on the tip side of the lever 37, and is disposed between the holding portion 37a and the partition wall 31e. For this reason, the ball valve 33 is configured to move along the partition wall 31e. In other words, the ball valve 33 moves in a plane perpendicular to the axial direction of the valve hole 32. At the bottom of the holding portion 37a, an opening 37b for pressing the ball valve 33 toward the partition wall 31e by water pressure is formed.

  The switch 34 is provided to move the ball valve 33 between the valve open position and the valve close position by being operated by the user. The switch 34 is connected to one end of the shaft member 38 and is configured to be rotatable about the shaft member 38. That is, the switch 34 is a seesaw type switch. The base end side of the lever 37 is connected to the other end portion of the shaft member 38. Therefore, the rotation of the switch 34 is transmitted to the lever 37 via the shaft member 38. The shaft member 38 is provided with a seal member 38a such as an O-ring. The switch 34 is an example of the “operator” in the present invention.

  Further, as shown in FIG. 3, the switch 34 includes an opening operation portion 34 a disposed on one side with respect to the shaft member 38 and a closing operation portion 34 b disposed on the other side with respect to the shaft member 38. It is out. When the opening operation portion 34a is pushed in, the lever 37 guides the ball valve 33 to the valve opening position, and when the closing operation portion 34b is pushed in, the lever 37 guides the ball valve 33 to the valve closing position. It is supposed to be.

  Here, the opening operation part 34a is formed to be longer than the closing operation part 34b. Specifically, the distance D1 from the position P corresponding to the shaft member 38 to the end of the opening operation portion 34a opposite to the shaft member 38 is the position D1 from the position P corresponding to the shaft member 38 to the shaft of the closing operation portion 34b. The distance D2 is larger than the distance D2 to the end opposite to the member 38. Moreover, the opening operation part 34a is formed so that the width | variety (length of the orthogonal | vertical direction with respect to the paper surface of FIG. 3) may become large compared with the closing operation part 34b. For this reason, the distance from the shaft member 38, which is the fulcrum, to the position that is the force point (the position that is operated by the switch 34) is likely to be larger in the opening operation than in the closing operation. The force applied to the tip of 37 (ball valve 33) tends to increase.

  The torsion spring 35 is provided to constantly urge the ball valve 33 toward the valve opening position. Specifically, as shown in FIG. 4, the torsion spring 35 has a coil portion 35 a inserted into a shaft member 38. The torsion spring 35 has one end 35 b engaged with the lever 37 and the other end 35 c abutted against the inner peripheral surface of the main body 31. Thereby, the torsion spring 35 always urges the lever 37 holding the ball valve 33 in the valve opening direction (R direction).

  The torsion spring 35 closes the ball valve 33 when the water pressure on the upstream side of the partition wall 31e (the upstream water passage 31d, the hose water passage 51, etc.) becomes lower than a preset threshold Th1. It is configured to move (return) from the position to the valve opening position. Here, the threshold Th1 is a value lower than the water pressure (water supply source pressure) supplied from the faucet 50. Details will be described later. The torsion spring 35 is an example of the “biasing means” in the present invention, and the threshold Th1 is an example of the “first threshold” in the present invention.

  The inner peripheral surface of the main body 31 is provided with an abutting portion 45 on which a lever 37 for holding the ball valve 33 abuts when the ball valve 33 is moved back from the valve closing position to the valve opening position. . The abutment portion 45 is formed so as to protrude inward from the inner peripheral surface of the main body portion 31 and functions to receive the lever 37 and the ball valve 33 that are always urged in the valve opening direction by the torsion spring 35 at the valve opening position. Have

  As shown in FIG. 5, the release passage 36 is provided to release the water pressure upstream of the partition wall 31e (back pressure against the ball valve 33). The release passage 36 is formed in the partition wall 31e and is formed so as to communicate the downstream water passage 31c and the upstream water passage 31d. That is, the release passage 36 is formed so as to penetrate the partition wall 31e in the thickness direction. The release passage 36 is a small hole having a diameter smaller than that of the valve hole 32. For example, the release passage 36 has a diameter of about 0.01 to 0.5 mm. The function of the release passage 36 will be described in detail later.

  Further, the water stop valve unit 3 includes a safety valve 39 for absorbing a water hammer. Here, the water hammer means that a high water pressure is generated on the upstream side of the partition wall 31e due to the inertia of water when the water supply state is switched to the water stop state (when the valve hole 32 is closed by the ball valve 33). It is a phenomenon that does. Specifically, the safety valve 39 is configured to open and release the water pressure upstream of the partition wall 31e when the water pressure upstream of the partition wall 31e becomes higher than a preset threshold Th2. ing. In addition, threshold value Th2 is a value higher than water supply original pressure, for example, is 0.5 MPa. That is, the safety valve 39 is configured to close when no water hammer is generated.

  The safety valve 39 is disposed on the downstream side of the partition wall 31e. The safety valve 39 includes a case 391, a safety valve passage 392, a plate valve 393, and a compression coil spring 394.

  The case 391 is formed in a bottomed cylindrical shape, and a plate valve 393 and a compression coil spring 394 are accommodated therein. The case 391 has an open end attached to the partition wall 31e or formed integrally. Further, an opening 391a for communicating the inside of the case 391 and the downstream water passage 31c is formed at the bottom of the case 391.

  The safety valve passage 392 is formed in the partition wall 31e and is formed so as to communicate the inside of the case 391 and the upstream water passage 31d. That is, the safety valve passage 392 is formed so as to penetrate the partition wall 31e in the thickness direction. The diameter of the safety valve passage 392 is smaller than the valve hole 32 and larger than the release passage 36.

  The plate valve 393 is disposed on the downstream side of the safety valve passage 392 and is provided to open and close the safety valve passage 392. The plate valve 393 is made of hard rubber, for example, and is configured to be movable in the axial direction of the safety valve passage 392.

  The compression coil spring 394 is disposed between the plate valve 393 and the bottom of the case 391. The compression coil spring 394 biases the plate valve 393 toward the partition wall 31e. That is, the compression coil spring 394 urges the plate valve 393 in the valve closing direction.

-Operation of the shower head-
Next, an example of the operation of the shower head 100 will be described.

[Before the faucet is opened]
First, before the faucet 50 is opened, water is not supplied to the shower head 100. At this time, as shown in FIG. 6, the lever 37 holding the ball valve 33 is urged by the torsion spring 35 in the valve opening direction (R direction), and the ball valve 33 is arranged at the valve opening position. That is, the valve hole 32 is in an open state, and the switch 34 is in a state in which the opening operation portion 34a is pushed. The lever 37 is in contact with a contact portion 45 provided on the inner peripheral surface of the main body portion 31. At this time, the safety valve passage 392 is closed by the plate valve 393 urged by the compression coil spring 394, and the safety valve 39 is closed.

[When the faucet is opened]
When the faucet 50 is opened by the user, water is supplied from the faucet 50 to the shower head 100. At this time, since the valve hole 32 is opened, water flows from the upstream water passage 31d to the downstream water passage 31c via the valve hole 32. Thereby, water is sprinkled (spouted) from the water spray plate 1a of the head unit 1. That is, when the faucet 50 is opened, since the ball valve 33 is in the valve open position, the water faucet enters and water is sprayed from the water spray plate 1a.

[When the switch is closed while water is flowing]
Next, when the user pushes the closing operation portion 34 b of the switch 34, the rotation of the switch 34 is transmitted to the lever 37 that holds the ball valve 33 via the shaft member 38. 2 to 5, the ball valve 33 is moved to the valve closing position, the ball valve 33 is seated on the valve seat 32a, and the valve hole 32 is closed. For this reason, it will be in a water stop state and watering from the watering board 1a will be stopped.

  Here, when the water flow state is switched to the water stop state, the water pressure on the upstream side of the partition wall 31e is rapidly increased by the water hammer. When the water pressure on the upstream side of the partition wall 31e reaches the threshold Th2, the plate valve 393 is moved to the downstream side against the biasing force of the compression coil spring 394, and the safety valve passage 392 is opened, so that the safety valve 39 Is opened. Thereby, water flows from the upstream water passage 31d to the downstream water passage 31c via the safety valve 39, and the water pressure on the upstream side of the partition wall 31e is released. When the water pressure on the upstream side of the partition wall 31e falls below the threshold Th2, the plate valve 393 is moved to the partition wall 31e side by the urging force of the compression coil spring 394, and the safety valve passage 392 is closed, so that the safety valve 39 Is closed. In this way, by absorbing the water hammer with the safety valve 39, it is possible to suppress expansion of the hose, damage to the connecting portion, and the like.

  And if it will be in a water stop state, the water pressure (water supply original pressure) supplied from the faucet 50 will be applied to the upstream of the partition wall 31e. In addition, although water supply original pressure changes with households etc., it is 0.3 MPa, for example. For this reason, the water pressure upstream of the partition wall 31e acts on the ball valve 33, and the ball valve 33 is pressed against the valve seat 32a by the water pressure. Thereby, even if the user's closing operation on the switch 34 is released (even if the user's finger is released from the closing operation portion 34b), the ball valve 33 is closed against the biasing force of the torsion spring 35. The position is maintained.

  At this time, water leaks from the upstream water passage 31d through the release passage 36 to the downstream water passage 31c. However, since the diameter of the release passage 36 is small, the flow rate of the leaking water is small and it is only slightly flowing from the water spray plate 1a, and it can be said that the water is substantially stopped. That is, the water stop state in the first embodiment is a state in which the partition wall 31e is not completely closed and water is slightly flowing. Even if there is a leak, since water is supplied from the faucet 50, the water pressure on the upstream side of the partition wall 31e is substantially the same as the water supply original pressure, and the ball valve 33 is maintained in the closed position. The

[When the switch is opened with the water stopped]
Next, when the user pushes the opening operation portion 34 a of the switch 34, the rotation of the switch 34 is transmitted to the lever 37 that holds the ball valve 33 via the shaft member 38. Thereby, the ball valve 33 is moved to the valve opening position, the ball valve 33 is separated from the valve seat 32a, and the valve hole 32 is opened. For this reason, it will be in a water flow state and the watering from the watering board 1a will be restarted. Even when the user's opening operation on the switch 34 is released (even if the user's finger is released from the opening operation portion 34a), the ball valve 33 remains in the open position by the biasing force of the torsion spring 35. Is done.

  Here, since the water pressure on the upstream side of the partition wall 31e acts on the ball valve 33 in the water stop state, the ball valve 33 is moved to the valve open position as compared with the case where the ball valve 33 is moved to the valve close position. If you want to make it more powerful. Therefore, in the first embodiment, by making the opening operation portion 34a longer than the closing operation portion 34b, the tip of the lever 37 (ball valve 33) is more open during the opening operation than the closing operation. The applied force tends to increase. For this reason, it is possible to easily move the ball valve 33 to the valve-opening position while receiving assistance from the torsion spring 35 even if the water pressure upstream of the partition wall 31e acts on the ball valve 33.

[When the faucet is closed with water flowing]
When the faucet 50 is closed by the user in the water passing state, the supply of water to the shower head 100 is stopped. Thereby, the watering from the watering board 1a of the head part 1 is stopped. Note that the ball valve 33 is maintained in the open position. That is, the valve hole 32 is in an open state, and the switch 34 is in a state in which the opening operation portion 34a is pushed.

[When the faucet is closed with the water stopped]
Further, when the faucet 50 is closed by the user in the water stop state, the supply of water to the shower head 100 is stopped. In addition, the watering from the watering plate 1a of the head part 1 is stopped.

  When the faucet 50 is closed, water leaks from the upstream water passage 31d to the downstream water passage 31c via the release passage 36. Thereby, the water pressure on the upstream side of the partition wall 31e is gradually reduced. When the water pressure on the upstream side of the partition wall 31e is lower than the threshold value Th1, the lever 37 holding the ball valve 33 is rotated in the valve opening direction by the biasing force of the torsion spring 35, and the lever 37 is brought into contact with the contact portion 45. Collide with. As a result, the ball valve 33 is separated from the valve seat 32a, the valve hole 32 is opened, the ball valve 33 is moved (returned) to the valve opening position, and the opening operation portion 34a is pushed in the switch 34. become.

-Effect-
In the first embodiment, as described above, the torsion spring 35 that constantly urges the ball valve 33 in the valve opening direction (R direction) and the release passage 36 that releases the water pressure on the upstream side of the partition wall 31e are provided. ing. With this configuration, when the water tap 50 is closed when the ball valve 33 is in the closed position, the water pressure on the upstream side of the partition wall 31e can be reduced by the release passage 36. For this reason, when the water pressure falls below the threshold Th1, the ball valve 33 can be moved from the closed position to the open position by the biasing force of the torsion spring 35. As a result, if the faucet 50 is closed when the ball valve 33 is in the valve closing position, the ball valve 33 automatically moves to the valve opening position, so that the water sprinkling is always performed when the faucet 50 is opened next time. can do. That is, since the user can always sprinkle water under the situation that the user wants to sprinkle water from the shower head 100, that is, the user opens the faucet 50, the convenience of the user can be improved.

  In addition, when the water is stopped, the user can be notified that the faucet 50 is open by slightly flowing water from the water spray plate 1a, so that the occurrence of forgetting to close the faucet 50 is suppressed. can do.

  In addition, when the ball valve 33 automatically moves to the valve opening position, the lever 37 collides with the contact portion 45, so that the collision sound makes the ball valve 33 return to the valve opening position. Can be notified.

  Moreover, in 1st embodiment, even if the water pressure of the upstream of the partition wall 31e is acting on the ball valve 33 by making the opening operation part 34a longer than the closing operation part 34b, the ball valve 33 is changed. It can be easily moved to the valve open position.

  Further, in the first embodiment, by providing the safety valve 39, it is possible to suppress the expansion of the hose, damage to the connection portion, and the like by absorbing the water hammer.

(Second embodiment)
Next, with reference to FIG. 7, the water stop valve unit 200 of the shower head by 2nd embodiment is demonstrated.

  In the water stop valve unit 200, a release passage 201 is provided in the plate valve 393 of the safety valve 39 as shown in FIG.

  The release passage 201 is provided to release the water pressure on the upstream side of the partition wall 31e. The release passage 201 is formed so as to penetrate the plate valve 393 in the thickness direction, and is formed so as to communicate the downstream water passage 31c and the upstream water passage 31d. The release passage 201 is a small hole having a smaller diameter than the valve hole 32, and has a diameter of, for example, about 0.01 to 0.5 mm.

  The remaining structure of the water stop valve unit 200 is the same as that of the water stop valve unit 3.

  In the second embodiment, the release passage 201 having a small diameter can be easily formed by providing the release passage 201 in the hard rubber plate valve 393 as described above. Further, since it is not necessary to provide a release passage in the synthetic resin partition wall 31e, the water stop valve unit 200 can be easily molded.

  The remaining effects of the second embodiment are similar to those of the first embodiment.

(Third embodiment)
Next, with reference to FIG. 8, the water stop valve unit 300 of the shower head by 3rd embodiment is demonstrated.

  In the water stop valve unit 300, as shown in FIG. 8, in addition to the release passage 36, a release valve 40 that opens when the water pressure falls below a preset threshold Th3 is provided. In addition, threshold value Th3 is a value higher than threshold value Th1, and is a value lower than water supply original pressure. This threshold Th3 is an example of the “second threshold” in the present invention.

  The release valve 40 is disposed on the downstream side of the partition wall 31e, and is provided to reduce the water pressure on the upstream side of the partition wall 31e in a short time. The release valve 40 includes a case 41, a release valve passage 42, a plate valve 43, and a compression coil spring 44. FIG. 8 shows a state where the release valve 40 is open. That is, even if the plate valve 43 is in contact with the partition wall 31e, the inside of the case 41 and the release valve passage 42 are communicated with each other via the gap 42a.

  The case 41 is formed in a bottomed cylindrical shape, and a plate valve 43 and a compression coil spring 44 are accommodated therein. As for case 41, the open end side is attached to the partition wall 31e, or is formed integrally. In addition, an opening 41 a for communicating the inside of the case 41 and the downstream water passage 31 c is formed at the bottom of the case 41. Further, a cylindrical body is provided inside the case 41, and a valve seat 41b is provided on the upstream side of the cylindrical body.

  The release valve passage 42 is formed in the partition wall 31e. The release valve passage 42 is formed so as to penetrate the partition wall 31e in the thickness direction, and a gap 42a is formed on the downstream side. For this reason, even if the plate valve 43 is in contact with the partition wall 31e, the inside of the case 41 and the release valve passage 42 communicate with each other through the gap 42a. The diameter of the release valve passage 42 is smaller than the valve hole 32 and larger than the release passage 36.

  The plate valve 43 is disposed between the partition wall 31e and the valve seat 41b, and is provided to open and close the valve seat 41b (opening 41a). The plate valve 43 is configured to be movable in the axial direction of the cylindrical body of the case 41.

  The compression coil spring 44 is disposed between the plate valve 43 and the bottom of the case 41. The compression coil spring 44 biases the plate valve 43 toward the partition wall 31e. That is, the compression coil spring 44 urges the plate valve 43 in the valve opening direction.

  The remaining configuration of the water stop valve unit 300 is the same as that of the water stop valve unit 3.

-Operation of the shower head-
Next, an example of the operation of the shower head will be described.

[Before the faucet is opened]
First, before the faucet 50 is opened, water is not supplied to the shower head. At this time, the lever 37 is urged by the torsion spring 35 in the valve opening direction (R direction), and the ball valve 33 is disposed at the valve opening position. At this time, the safety valve passage 392 is closed by the plate valve 393 urged by the compression coil spring 394, and the safety valve 39 is closed. Further, the plate valve 43 is brought into contact with the partition wall 31e by the biasing force of the compression coil spring 44, the valve seat 41b is opened, and the release valve 40 is opened.

[When the faucet is opened]
When the faucet 50 is opened by the user, water is supplied from the faucet 50 to the shower head. At this time, since the valve hole 32 is opened, water flows from the upstream water passage 31d to the downstream water passage 31c via the valve hole 32. As a result, water is sprayed from the water spray plate 1 a of the head unit 1.

  When the hydraulic pressure supplied from the faucet 50 becomes higher than the threshold Th3, the plate valve 43 is moved downstream against the biasing force of the compression coil spring 44, and the plate valve 43 is seated on the valve seat 41b. The release valve 40 is closed.

[When the switch is closed while water is flowing]
Next, when the user pushes the closing operation portion 34 b of the switch 34, the rotation of the switch 34 is transmitted to the lever 37 via the shaft member 38. Thereby, the ball valve 33 is moved to the valve closing position, the ball valve 33 is seated on the valve seat 32a, and the valve hole 32 is closed. For this reason, it will be in a water stop state and watering from the watering board 1a will be stopped.

  At this time, the water hammer is absorbed by the safety valve 39. And if it will be in a water stop state, the water pressure (water supply original pressure) supplied from the faucet 50 will be applied to the upstream of the partition wall 31e. For this reason, even if the closing operation on the switch 34 by the user is released, the ball valve 33 is maintained in the closed position against the biasing force of the torsion spring 35. Note that the release valve 40 remains closed.

[When the faucet is closed with the water stopped]
Next, when the faucet 50 is closed by the user in the water stop state, the water supply to the shower head is stopped. In addition, the watering from the watering plate 1a of the head part 1 is stopped.

  When the faucet 50 is closed, water leaks from the upstream water passage 31d to the downstream water passage 31c via the release passage 36. Thereby, the water pressure on the upstream side of the partition wall 31e is gradually reduced. When the water pressure on the upstream side of the partition wall 31e is lower than the threshold Th3, the plate valve 43 is moved to the partition wall 31e side by the urging force of the compression coil spring 44, and the release valve 40 is opened. As a result, the flow rate of the water flowing from the upstream water passage 31d to the downstream water passage 31c increases, so that the water pressure on the upstream side of the partition wall 31e is rapidly reduced. That is, when the release valve 40 is opened, the degree of decrease in the water pressure is greater than when the water pressure is reduced only by the release passage 36.

  When the water pressure on the upstream side of the partition wall 31e is lower than the threshold value Th1, the lever 37 is rotated in the valve opening direction by the biasing force of the torsion spring 35, and the lever 37 collides with the contact portion 45. Thereby, the ball valve 33 is separated from the valve seat 32a, the valve hole 32 is opened, the ball valve 33 is moved to the valve opening position, and the opening operation portion 34a is pushed in the switch 34.

-Effect-
In the third embodiment, as described above, by providing the release valve 40, the water pressure on the upstream side of the partition wall 31e can be reduced in a short time, so that the ball valve 33 is returned to the valve opening position early. Can do.

  The remaining effects of the third embodiment are similar to those of the first embodiment.

(Other embodiments)
For example, in the first to third embodiments, the ball valve 33 is shown as an example of the valve body. However, the present invention is not limited thereto, and the valve body may have another shape such as a flat plate.

  In the first to third embodiments, the switch 34 is a seesaw type. However, the present invention is not limited to this, and the switch may be of other types such as a slide type.

  In the first to third embodiments, the torsion spring 35 is shown as an example of the urging unit. However, the urging unit may be a tension or compression coil spring.

  In the first to third embodiments, the example in which the water stop valve unit 3 (200, 300) and the head portion 1 are attached by screwing is shown. And may be attached by other methods such as press fitting. The same applies to the attachment of the water stop valve unit and the grip portion.

  In the first to third embodiments, an example in which the lever 37 collides with the contact portion 45 when the ball valve 33 automatically returns to the valve opening position has been described. When the valve automatically returns to the valve opening position, the ball valve may collide with the contact portion.

100 ··· Shower head 1 ··· Head portion 1a ··· Water sprinkling portion 2 ··· Grip portion 3 ··· Water stop valve unit 31 ··· Body portion 31a ··· Spiral groove 31b ··· Spiral groove 31c ・ ・ Downstream waterway (waterway)
31d ・ ・ Upstream waterway (waterway)
31e ... Partition wall 32 ... Valve hole 32a ... Valve seat 33 ... Ball valve (valve element)
34 ... Switch (operator)
34a ... Opening operation part 34b ... Closing operation part 35 ... Torsion spring (biasing means)
35a ... Coil part 35b ... One end 35c ... Other end 36 ... Release passage (release means)
37 ... Lever 37a ... Holding part 37b ... Opening 38 ... Shaft member 38a ... Seal member 39 ... Safety valve 391 ... Case 391a ... Opening part 392 ... Safety valve passage 393 ... Plate valve 394 ..Compression coil spring 200.Water stop valve unit 201.Release passage (release means)
300 .. Stop valve unit 40 .. release valve (release means)
41 ... Case 41a ... Opening part 41b ... Valve seat 42 ... Release valve passage 42a ... Gap 43 ... Plate valve 44 ... Compression coil spring 45 ... Contact part

Claims (6)

A shower head capable of switching between a water flow state and a water stop state when the faucet is opened,
A valve hole formed in a partition wall that partitions the upstream side and the downstream side of the water passage,
A valve body disposed on the upstream side of the partition wall to open and close the valve hole;
An operator for moving the valve body between a valve opening position and a valve closing position;
Biasing means for constantly biasing the valve body toward the valve opening position;
Release means for releasing the water pressure on the upstream side of the partition wall,
Even if the operation of the operation element is released when the valve element is moved from the valve opening position to the valve closing position by operating the operation element in a state where the water faucet is opened. The valve body is maintained in the closed position by the water pressure upstream of the partition wall,
When the faucet is opened and the valve body is maintained at the closed position, the water pressure on the upstream side of the partition wall is reduced by the release means when the faucet is closed. The shower head is configured to move the valve body from the valve closing position to the valve opening position by the urging force of the urging means when the pressure drops below a first threshold value.   The shower head according to claim 1, wherein the release means includes a release passage that communicates the upstream side and the downstream side of the partition wall. The release means includes a release passage communicating the upstream side and the downstream side of the partition wall, and a release valve that opens when the water pressure on the upstream side of the partition wall falls below a second threshold value,
When the faucet is opened, the release valve is closed, and when the faucet is closed from a state where the valve body is maintained at the closed position, the release passage causes the partition wall to When the upstream water pressure is reduced and the water pressure falls below the second threshold, the release valve is opened to rapidly reduce the water pressure, and the water pressure falls below the first threshold. 2. The shower head according to claim 1, wherein the valve body is configured to be moved from the valve closing position to the valve opening position by an urging force of the urging means. Equipped with a safety valve to absorb the water hammer,
The shower head according to claim 2 or 3, wherein the release passage is provided in the safety valve. The operating element is connected to a shaft member, is configured to be rotatable about the shaft member, and is arranged on one side with respect to the shaft member, and the shaft member And a closing operation portion arranged on the other side,
The shower head according to any one of claims 1 to 4, wherein the opening operation unit is longer than the closing operation unit.   The contact part with which the lever holding the said valve body or the said valve body collides when the said valve body is moved from the said valve closing position to the said valve opening position is provided. The shower head according to any one of claims 1 to 5.

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