JP2007229688A - Spout apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spout apparatus capable of repeatedly changing a spout position by using hydraulic power and differing the moving speed in the outward route from that in homeward route in repetitive motion. <P>SOLUTION: The spout apparatus 10 is provided with a housing 2 and a spout cylindrical body 80 projected from both sides of the housing 2. The housing 2 is divided into two pressure chambers 16, 18 by a core 20. A core inside flow passage 24 is formed inside the core 20 and communicates with a spout flow passage 82 in the spout cylindrical body 80. The core 20 is provided with introducing ports 32 and 34 and leak-in ports 502 and 504 for communicating the core inside flow passage 24 with the pressure chambers 16, 18. The leak-in port 502 is made larger than the leak-in port 504. As a result, water quantity leaked from the pressure chamber 18 when the introducing port 34 is closed is larger than the water quantity leaked from the pressure chamber 18 to differ the movement speed in the outward route from that in the homeward route in the repetitive motion. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a water discharge device, and more particularly, to a water discharge device that enables an automatic reciprocating operation that repeatedly changes a water discharge position such as a shower nozzle or a water spray nozzle.

  There is a growing need for shower systems and water discharge / spraying systems for relaxation and beauty and health promotion. In these applications, for example, there is an approach that promotes a massage effect or the like by modulating a water flow at a relatively high speed of several tens of hertz or more using a swirling flow or the like. On the other hand, for example, if the water discharge position and direction of the shower nozzle are repeatedly changed at a relatively slow speed of several hertz or less, for example, the water discharge is uniformly sprayed to a predetermined range of the human body to promote the relaxation effect, etc. Is possible.

  Similar needs exist widely in consumer equipment, industrial or agricultural applications, and require slow reciprocating motions for a variety of purposes such as cleaning, rinsing, cooling, humidification, pretreatment, and cultivation. It is said that.

  It is possible to use electric means such as motors and solenoids for reciprocal operation, but in order to install it in a system that discharges water in a bathroom, etc., measures for securing a power source, electric shock, and electric leakage are required. There are many problems to be solved in terms of cost and reliability.

  On the other hand, if the reciprocating operation can be realized by hydraulic power, electricity and lubricating oil are unnecessary, and improvement can be expected from many viewpoints such as initial cost, running cost, reliability, and maintainability.

  A combination of a piston and a four-way valve has been disclosed as a shower device that can move up and down (Patent Document 1). This shower device moves a shower head up and down via a wire by moving a piston provided in a cylinder up and down by water pressure. The switching of the upward / downward movement of the piston is performed by switching the water supply passage for the cylinder with a four-way valve.

JP-A-2-134119

  However, in the case of this conventional shower apparatus, the cylinder and the four-way valve are provided separately, and the system is large and complicated. Moreover, since the flow path becomes long, there is room for improvement in that the pressure loss is large and the water discharge force is reduced.

  Further, in consideration of the actual usage of the water discharging device that enables repetitive linear motion in this way, it is more convenient if the moving speed can be made different between the forward path and the return path in, for example, a reciprocating operation. . For example, when this water discharge device is used as a shower for washing a human body, the water discharge position is efficiently moved as a whole by moving it slowly in the direction of removing dirt, that is, in the downward direction and in the upward direction. Cleaning is possible.

  The present invention has been made on the basis of recognition of such a problem, and an object of the present invention is to provide a water discharging device capable of repeatedly changing a water discharging position using hydraulic power, and in a forward movement and a return movement of a repetitive motion. It is providing the water discharging apparatus which can vary a moving speed.

According to one aspect of the invention,
A housing having a space inside;
A core that is movable in the space while dividing the space into first and second pressure chambers, and has a core flow path inside;
A water discharge cylinder having a water discharge flow path communicating with the flow path in the core and reaching the outside of the housing;
A first water inlet for introducing a fluid into the first pressure chamber;
A second water inlet for introducing a fluid into the second pressure chamber;
A first inlet for introducing a fluid from the first pressure chamber into the core flow path;
A second inlet for introducing fluid from the second pressure chamber into the core flow path;
A valve body for changing the opening of the first and second inlets;
When the core reaches the end of the moving region on the first pressure chamber side, the pressure in the first pressure chamber is made higher than the pressure in the second pressure chamber, and the core The valve body is operated so that the pressure in the second pressure chamber is higher than the pressure in the first pressure chamber when the end of the moving region on the second pressure chamber side is reached. Control means for changing the opening of the first and second inlets;
With
An amount of the fluid that leaks from the first pressure chamber to the flow path in the core or the second pressure chamber when the valve body minimizes the opening of the first introduction port; The amount of the fluid that leaks from the second pressure chamber to the core internal flow path or the first pressure chamber when the body minimizes the opening of the second inlet. A water discharge device is provided.
The moving area of the core refers to a space where the core actually moves when the water discharge device is operated, and the end of the moving area refers to an end in the moving direction of the core.

  According to the present invention, it is a water discharger that can change the water discharge position repeatedly using hydraulic power, and it is possible to obtain a water discharger that can change the moving speed between the forward path and the return path of the repetitive motion. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, a first embodiment of the present invention will be described.
FIG. 1 is a schematic diagram illustrating an overall configuration of a water discharge device according to the present embodiment, and FIGS. 2 to 5 are schematic diagrams illustrating an operation mechanism of the water discharge device.
As shown in FIG. 1, the water discharge device 10 according to this embodiment includes a housing 2 and a water discharge cylinder 80 protruding from the housing 2. And the water discharge flow path 82 (refer FIG. 2) is formed in the water discharge cylinder 80, and the water discharge W2 is obtained by connecting the water discharge nozzle 800, such as a shower nozzle, to the front-end | tip.

  As shown in FIGS. 2 to 5, the water discharge device 10 according to this embodiment includes a core 20 that is movably provided in the housing 2. The interior of the housing 2 is divided into two pressure chambers 16 and 18 by a core 20. The core 20 has a hollow structure, and the hollow space constitutes the core inner flow path 24 that communicates with the water discharge flow path 82 provided in the water discharge cylinder 80. Further, the core inner flow path 24 communicates with the pressure chambers 16 and 18 through the inlets 32 and 34, respectively.

  In addition, the core 20 is also formed with a leak inlet 502 that allows the pressure chamber 16 and the core inner passage 24 to communicate with each other, and a leak inlet 504 that allows the pressure chamber 18 and the core inner passage 24 to communicate with each other. The flow path resistance of the leakage port 502 and the flow path resistance of the leakage port 504 are configured to be different from each other. For example, the size of the leak port 502 is larger than the size of the leak port 504, so that the flow channel resistance of the leak port 502 is smaller than the flow channel resistance of the leak port 504. The “size of the leak inlet” refers to the smallest cross sectional area among the cross sectional areas orthogonal to the direction of fluid flow in the region through which the fluid flows in the leak inlet. Further, it is desirable that the flow path resistances of these inlets 502 and 504 are larger than the flow path resistances of the introduction ports 32 and 34.

  Furthermore, two water inlets 12 and 14 are connected to the housing 2. The water inlets 12 and 14 are respectively provided at the branch ends of the bifurcated water supply pipe 700 so that fluid W1 such as water or hot water is supplied at the same pressure. For example, the inner diameters and shapes of the water inlets 12 and 14 are the same, and therefore the flow resistance is also the same. When the fluid W1 such as water or hot water is supplied to the water discharge device 10 having such a configuration through the water supply pipe 700, the water discharge cylinder 80 reciprocates left and right as indicated by the arrow M according to the principle described later. Then, the fluid W2 is discharged from the water discharge nozzle 800. Therefore, if the housing 2 is fixed, it can be used as a water discharge device in which the water discharge position changes repeatedly. On the other hand, if the water discharge nozzle 800 is fixed, the housing 2 will repetitively move, and this movement can be used for massage, for example.

  At this time, since the size of the water inlet 502 is larger than the size of the water inlet 504, the direction of the water discharge cylinder 80 from the water inlet 12 toward the water inlet 14, that is, the direction toward the right side in the drawing ( Hereinafter, the movement speed when moving in the “right direction” is relatively slow, and the direction in which the water discharge cylinder 80 is directed from the water inlet 14 toward the water inlet 12, that is, the direction toward the left side in the drawing (hereinafter referred to as “the right direction”). The moving speed when moving in the “left direction” is relatively high. The reason for this will be described in detail later.

  The core 20 is provided with valve bodies 42 and 44 for changing the opening degree of the introduction ports 32 and 34. The core 20 is provided with control means (not shown in FIGS. 2 to 5) for controlling the valve bodies 42 and 44. When the core 20 reaches the end on the pressure chamber 16 side (left side) in the moving region, the control means makes the pressure in the pressure chamber 16 higher than the pressure in the pressure chamber 18, and the core 20 The valve bodies 42 and 44 are operated and introduced so that the pressure in the pressure chamber 18 becomes higher than the pressure in the pressure chamber 16 when the pressure chamber 18 side (right side) end in the moving region is reached. The opening degree of the mouths 32 and 34 is changed. That is, with the state in which the pressure in the pressure chamber 16 and the pressure in the pressure chamber 18 become equal (hereinafter referred to as “neutral state”), the magnitude relationship between the pressures in the pressure chambers 16 and 18 is reversed. The opening degree of the inlets 32 and 34 is changed.

  More specifically, when the core 20 reaches the end on the pressure chamber 16 side (left side) in the moving region, the control means reduces the flow resistance from the pressure chamber 16 to the core inner flow path 24. Then, the valve bodies 42 and 44 are operated so as to be larger than the flow path resistance from the pressure chamber 18 to the core inner flow path 24 to change the opening degree of the inlets 32 and 34, and the core 20 moves in its moving range. When the pressure chamber 18 side (right side) end is reached, the flow resistance from the pressure chamber 18 to the core internal flow path 24 is determined from the flow resistance from the pressure chamber 16 to the core internal flow path 24. The valve bodies 42 and 44 are operated so that the opening degree of the inlets 32 and 34 is changed.

  In this case, in the neutral state described above, the flow resistance when the fluid in the pressure chamber 16 flows into the core internal flow path 24 through the inlet 32 and the leakage port 502 (hereinafter referred to as “left flow path resistance”). A flow path resistance when the fluid in the pressure chamber 18 flows into the core flow path 24 via the inlet 34 and the inlet 504 (hereinafter also referred to as “right flow path resistance”), Are equal. Then, the control means can switch between a state where the left channel resistance is larger than the right channel resistance and a state where the right channel resistance is larger than the left channel resistance across the neutral state. The opening degree of the inlets 32 and 34 is changed.

  In the present specification, the “opening degree” of the introduction port is a parameter that determines the flow path resistance of the fluid flowing through the introduction port. For example, in the state shown in FIG. 2, the flow path resistance of the flow path formed at the introduction port 32 is higher than the flow path resistance of the flow path formed at the introduction port 34. In this case, the opening degree of the introduction port 32 is smaller than the opening degree of the introduction port 34. Moreover, the opening degree of the inlets 32 and 34 which implement | achieves the above-mentioned "neutral state" is called "neutral opening degree." Furthermore, the movement area of the core 20 refers to a space in which the core 20 actually moves when the water discharge device 10 is operated. Further, the end of the moving area refers to an end in the moving direction of the core 20.

  In the neutral state, the pressure in the pressure chamber 16 and the pressure in the pressure chamber 18 become equal, and the core 20 stops. From this neutral state, the opening of the inlets 32 and 34 is shifted from the neutral opening to an opening that is biased to either one, whereby the flow path of the flow path from the pressure chamber 16 to the flow path 24 in the core. The resistance (left channel resistance) and the channel resistance (right channel resistance) of the channel from the pressure chamber 18 to the core inner channel 24 are differentiated, whereby the pressure in the pressure chamber 16 and the pressure chamber 18 are changed. A difference is produced between the inner pressure and the core 20 can be moved using this pressure difference.

  In the state shown in FIG. 2, the control means urges the valve bodies 42 and 44 to the right end, and the fluid inlet 34 is opened on the right side of the core 20. Therefore, a fluid such as water supplied from the water inlet 14 flows into the core inner flow path 24 from the pressure chamber 18 through the path indicated by the arrow C and the path indicated by the arrow G, and the water discharge cylinder. It flows out as shown by arrows D and E through the water discharge passage 82 provided at 80. On the other hand, the flow path of the fluid supplied from the water inlet 12 of the housing into the pressure chamber 16 is only the path indicated by the arrow F. At this time, the channel resistance of the channel represented by arrow F is larger than the total channel resistance of the channel represented by arrow C and the channel represented by arrow G. On the other hand, since the flow path resistance of the water inlet 12 and the flow path resistance of the water inlet 14 are equal, the pressure in the pressure chamber 16 is higher than the pressure in the pressure chamber 18. As a result, the core 20 moves in the direction of the arrow M.

  FIG. 6 is a schematic diagram for explaining the operational effect of changing the opening of the introduction ports 32 and 34 from the neutral opening. In FIG. 6, the center line 1000 indicates the center position of the core 20, and the neutral line 1001 indicates the position of the boundary surface between the valve body 42 and the valve body 44 when the opening of the introduction ports 32 and 34 becomes the neutral opening. Indicates. As illustrated in FIG. 6A, when the boundary surface between the valve body 42 and the valve body 44 is at the position of the neutral line 1001, the total flow resistance of the introduction port 32 and the leakage port 502 (the left-side flow path). Resistance) and the total flow resistance (right flow resistance) of the inlet 34 and the leak inlet 504 are in a neutral state, and the pressure in the pressure chamber 16 and the pressure in the pressure chamber 18 become equal. There is no pressure difference between the left and right of the child 20. Therefore, the core 20 does not move unless some external force is applied.

  On the other hand, as illustrated in FIG. 6B, when the position of the boundary surface between the valve bodies 42 and 44 is shifted to the right side from the neutral line 1001, the opening degree of the introduction port 32 is larger than the opening degree of the introduction port 34. And the left channel resistance becomes larger than the right channel resistance. Thereby, the pressure in the pressure chamber 16 becomes higher than the pressure in the pressure chamber 18, and the force due to this pressure difference acts on the core 20 and the valve body 42, respectively.

  Therefore, when the force applied to the core 20 exceeds the sliding resistance, the core 20 moves to the right side. On the other hand, since the valve body 42 is also movable with respect to the core 20, when the force applied to the valve body 42 exceeds the sliding resistance of the valve body 42, the valve body 42 is relative to the core 20. Move to the right. When the valve body 42 moves to the right side, the flow path resistance through the inlet 32 becomes higher and the pressure difference increases. That is, each force applied to the core 20 and the valve 42 increases, and the movement of the core 20 and the valve body 42 is promoted.

  Finally, as shown in FIG. 6C, the inlet 32 is fully closed. At this time, the difference between the left and right channel resistances is the largest in this direction, and forces corresponding to the maximum pressure difference act on the core 20 and the valve body 42, respectively.

  As described above, in order to move the core 20 in the present invention, the opening of the introduction ports 32 and 34 may be shifted from the neutral opening to generate a pressure difference necessary for movement. At this time, by setting one of the introduction ports in an open state and the other in a closed state, the maximum pressure difference is obtained, and the most reliable and stable moving force is obtained.

  Returning to FIG. 3 again, the description will be continued. When the core 20 moves in the housing 2 to the right end or near the right end of the moving stroke as shown in the figure, the valve bodies 42 and 44 are controlled by the control means. Move to the left. Then, the right inlet 34 of the core 20 is closed and the left inlet 32 is opened. In this state, the fluid supplied from the water inlet 12 into the pressure chamber 16 passes through the inlet 20 shown by the arrow H and the passage through the leakage port 502 shown by the arrow F. Flows into the inner core flow path 24 and flows out of the water discharge cylinder 80 as indicated by arrows D and E. On the other hand, the fluid supplied from the water inlet 14 into the pressure chamber 18 flows into the core inner flow path 24 only by a path passing through the leak port 504 indicated by the arrow G because the inlet 34 is closed. To do. Therefore, the flow path resistance of the flow path represented by the arrow G is larger than the flow path resistance of the parallel path including the flow path represented by the arrow H and the flow path represented by the arrow F. On the other hand, since the flow path resistance of the water inlet 12 and the flow path resistance of the water inlet 14 are equal, the pressure in the pressure chamber 18 becomes higher than the pressure in the pressure chamber 16, and the core 20 is shown in FIGS. Move to the left as indicated by arrow M.

  When the core 20 continues to move to the left and reaches the left end or the vicinity of the left end of the housing 2 as shown in FIG. 5, the valve bodies 42 and 44 move to the right under the control of the control means. Then, as described above with reference to FIG. 2, the left inlet 32 of the core 20 is closed and the right inlet 34 is opened. As a result, the pressure in the pressure chamber 16 becomes higher than the pressure in the pressure chamber 18, and the core 20 moves to the right as indicated by the arrow M. Thereafter, by repeating the operation described above with reference to FIGS. 2 to 5, the core 20 continues to move in the housing 2 repeatedly left and right.

  At this time, since the size of the leakage port 502 is larger than the size of the leakage port 504, as shown in FIG. 2, when the inlet 32 is closed by the valve body 42, leakage occurs from the pressure chamber 16 through the leakage port 502. As shown in FIGS. 3 and 4, the amount of water that exits per unit time is larger than the amount of water that leaks from the pressure chamber 18 through the leak inlet 504 when the inlet 34 is closed by the valve body 44. As a result, the amount of water per unit time contributing to the volume expansion of the pressure chamber 16 when the inlet 32 is closed is less than the amount of water contributing to the volume expansion of the pressure chamber 18 when the inlet 34 is closed. The moving speed when the core moves in the right direction is smaller than the moving speed when the core moves in the left direction.

Hereinafter, this operation will be described quantitatively. For the pressure chamber (water stop chamber) whose opening is smaller than the neutral opening, let Qin be the flow rate per unit time of the fluid flowing into this pressure chamber, and per unit time of the fluid leaking from this pressure chamber Qout is the flow rate of the core, and the area of the surface of the core that is exposed in the pressure chamber is projected onto a plane perpendicular to the moving direction of the core (hereinafter referred to as pressure receiving area) as S, When the moving speed of the core is V, the following formula (1) is established.

V = (Qin−Qout) / S (1)

In the present embodiment, the leakage amount Qout is varied and the moving speed V is varied by varying the size of the leakage port between the two pressure chambers.

  Further, as described above, when the core 20 is reversed in the housing 2, the valve bodies 42 and 44 are controlled by the control means. Such control can be realized using a magnet, for example.

  FIG. 7 is a schematic diagram for explaining a mechanism for controlling the reversing operation of the core by the magnet. That is, FIG. 7A shows a state in which the core 20 moves from the left side toward the right side, and the valve body 44 is in contact with the inner wall of the housing body 2. In this example, the core 20 is provided with a magnet 70, and the housing 2 is provided with a magnet (or ferromagnetic material) 74. In the state of FIG. 7A, the force due to the pressure difference acts on the core 20, so that the core 20 moves further to the right. That is, the core 20 further moves to the right side in a state where the valve body 44 is in contact with the housing 2 and fixed in the moving direction.

  Finally, the state shown in FIG. In this state, since the opening of the inlets 32 and 34 is a neutral opening, a pressure difference due to a difference in flow path resistance does not occur. However, at this time, the core 20 can be further pulled to the right side by the attractive force acting between the magnet 70 and the magnet (or ferromagnetic body) 74.

  In this case, depending on the value of the sliding resistance of the core 20, the core 20 may stop before the state shown in FIG. In such a case, it is desirable to attract the core 20 by an attractive force acting between the magnet 70 and the magnet (or ferromagnetic body) 74 in the state between FIG. 7A and FIG. 7B. .

  Now, when the core 20 is drawn to the right side by the attractive force of the magnet from the state shown in FIG. 7B, the opening degree of the inlet 32 is larger than the neutral opening degree as shown in FIG. A state is formed in which the opening of the introduction port 34 is smaller than the neutral opening. Then, a difference is generated between the left channel resistance and the right channel resistance, and a pressure difference is generated on both sides of the core 20. That is, the pressure on the right side of the core 20 becomes higher, and the core 20 starts to move toward the left side. That is, the moving direction of the core 20 can be reversed by changing the opening difference between the introduction ports 32 and 34 with the neutral state interposed therebetween.

  At this time, as described above with reference to FIG. 6, the pressure difference also acts on the valve body 44, and a force in the direction of closing the valve body 44 acts. As a result, as shown in FIG. 7D, the valve body 44 is completely closed, and the pressure difference between the left and right of the core 20 becomes the maximum value in this direction. That is, the maximum driving force to the left is obtained after the core 20 is inverted.

  As described above, if the core 20 can be drawn to the state shown in FIG. 7C by the attractive force acting between the magnet 70 and the magnet (or ferromagnetic body) 74, the inlets 32 and 34 are provided. Can be changed across the neutral state, and the moving direction of the core 20 can be reversed. That is, the core 20 can be reciprocated linearly in the housing 2.

  In this case, it is necessary that the core 20 moves by overcoming the attractive force of the magnet after the reversal. That is, it is desirable to appropriately set the balance between the force acting on the core 20 due to the pressure difference and the attractive force obtained by the magnet.

  In the case of the specific example shown in FIG. 7, the surfaces of the valve bodies 42 and 44 (contact surfaces with the housing 2) project in a curved shape so that a gap is generated even in the state of contact with the housing 2. Thus, by reducing the contact area to the housing 2, the pressure difference received by the valve body can be effectively utilized, and the valve body inversion operation of changing the opening degree difference across the neutral state is smoothly performed. be able to.

  In the case of the specific example shown in FIG. 7, the valve bodies 42 and 44 are brought into contact with the inner wall of the housing 2 when the core 20 is reversed, but the present invention is not limited to this. For example, magnets are provided on the valve bodies 42 and 44, while magnets are also provided on the inner wall of the housing 2, and the valve bodies 42 and 44 are moved relative to the housing 2 by utilizing a repulsive force acting between them. It can also be stopped. That is, in this case, in the state corresponding to FIGS. 7A to 7C, the valve bodies 42 and 44 do not contact the inner wall of the housing 2, and the repulsive force of the magnet (not shown) causes the housing 2 to It will be in the state away from the inner wall by a predetermined distance. In this way, the core can be reversed without contact. As a result, for example, the reciprocating motion of the core can be made smooth, and the valve body can be prevented from coming into contact with the housing and generating sound. In this case, the moving range of the core is not a space where the core should have moved if there is no magnet, but a space where the core actually moves under the action of the magnet.

  As described above, in order to move the core 20, the opening of the introduction ports 32 and 34 may be shifted from the neutral opening to generate a pressure difference necessary for movement. Similarly, when the moving direction of the core 20 is reversed, the opening degree difference between the introduction ports 32 and 34 may be changed by the control means across the neutral state. For example, when the ratio of the neutral openings of the inlets 32 and 34 is 40:60, the ratio of the openings of the inlets 32 and 34 is reversed by changing from 30:30 to 30:70 by the control means. Operation is possible. Furthermore, if the opening degree is changed from 100: 0 to 0: 100 by the control means, the most reliable and stable reversing operation is possible.

  According to this embodiment, the core 20 accommodated in the housing 2 is provided with the valve bodies 42 and 44 and the control means, and the fluid is supplied to the pressure chambers on both sides, so that the core 20 is relative to the housing 2. Can be reciprocated. At this time, by making the moving direction of the core 20 and the moving directions of the valve bodies 42 and 44 substantially the same, the moving operation of the core 20 and the opening degree control operation are linked, and the core 20 is reversed. The reversing operation of the valve body in which the opening difference between the inlets 32 and 34 is changed across the neutral state is ensured and easy, and a simple and compact valve body and control means are realized.

  Further, by making the sizes of the leakage ports 502 and 504 different from each other, the gap between the flow path from the pressure chamber 16 to the core inner flow path 24 and the flow path from the pressure chamber 18 to the core inner flow path 24 is reduced. A difference in flow path resistance can be formed in the reciprocating motion of the core 20 so that the speed of the forward path and the speed of the return path can be made different from each other. Thus, for example, when the water discharge device 10 is used as a shower device for washing a human body, the water discharge nozzle 800 serving as a shower head is moved slowly in the downward direction, which is a direction to remove dirt, and quickly in the upward direction. By returning it, it becomes possible to wash efficiently as a whole.

  Even if there is no difference between the left flow path resistance and the right flow path resistance, the speed of the forward path and the speed of the return path are made different by changing the incoming water flow rate supplied to the water discharge device 10 between the forward path and the return path. In this case, the incoming water flow rate must be changed each time the direction is switched. Further, since the discharge flow rate changes depending on the moving direction, the user feels uncomfortable.

  On the other hand, according to this embodiment, it is not necessary to change the incoming water flow rate each time the direction is switched. Moreover, since the amount of water discharge does not change even if a moving direction changes, a user does not feel uncomfortable. Furthermore, since the amount of water discharged per unit time is constant, the total amount of water discharged in the process of moving downwards is greater than the total amount of water discharged in the process of moving upwards. It can be performed.

  On the other hand, when massage is performed with a shower device, the water discharge nozzle 800 is slowly moved in the direction toward the heart along the user's veins or lymph glands, and is quickly returned in the opposite direction to further enhance the massage effect. Can do. Furthermore, even when the water discharge device 10 is incorporated into a dishwasher, the water discharge nozzle 800 is moved slowly in the direction to remove dirt and quickly returned to the opposite direction, thereby improving the cleaning efficiency, time, water, detergent. Can be saved.

  Furthermore, according to this embodiment, mechanical power such as electricity is not required, smooth reciprocal reversal motion is possible only with water (fluid) supply pressure, and no countermeasures such as installation of electric power, electric shock, or electric leakage are required. Become. In addition, smooth operation is possible without being affected by disturbances such as electromagnetic noise. As a result, it can be stably operated in various environments such as a bathroom, outdoors, or various industrial sites.

  Furthermore, since the water discharging apparatus according to the present embodiment is provided with the valve bodies 42 and 44 and the control means attached to the core 20, for example, an external four-way valve is not required, and the structure is simple. Smooth reciprocating reversal motion can be realized. As a result, downsizing becomes easy and the flow path becomes simple, so that pressure loss can be suppressed, and it is advantageous in that a water discharge amount and water discharge pressure can be secured. Further, since the valve bodies 42 and 44 and the control means are built in the housing 2, it is possible to realize a smooth operation strong against disturbance. As a result, it can be stably operated in various environments such as a bathroom, outdoors, or various industrial sites.

  Furthermore, regarding the water supply, the water discharge device according to the present embodiment only has to be branched from the same water supply source and connected to the two water inlets, and the workability is excellent. In addition, since a fluid flow path is formed inside the moving core and the water discharge cylinder, it is possible to reciprocate the water discharge position and water discharge direction simply by connecting various water discharge nozzles to the tip of the water discharge cylinder. Workability is also excellent in that it is possible and no special connection member is required.

Hereinafter, a specific example of the first embodiment will be described in detail. First, a first specific example of the present embodiment will be described. As a first specific example, a water discharger having a control means combining a magnet and a leaf spring will be described.
FIG. 8 thru | or FIG. 11 is a schematic diagram showing the principal part of the water discharging apparatus which concerns on a 1st specific example. That is, FIG. 8 is a perspective view of the water discharging apparatus according to this example, FIG. 9 is a perspective cutaway view, FIG. 10 is a cross-sectional view, and FIG. 11 is a cross-sectional view taken along the line AA in FIG. .

  As shown in FIG. 8, in the water discharging apparatus 100 of this specific example, the housing formed by the housing main body 102 and the housing lid | cover 104 is provided, and the water discharging cylinder 180 protrudes from this housing right and left. The water discharge cylinder 180 has a hollow structure having a water discharge flow path 182 inside, and is open at the tip. In addition, the water discharge cylinder 180 does not necessarily need to be a columnar shape, and various examples such as a prismatic shape and a flat shape can be given.

  The housing main body 102 is provided with water inlets 112 and 114. The inner diameter of the water inlet 114 and the inner diameter of the water inlet 112 are equal to each other. When a fluid such as water is introduced into the water inlets 112, 114, the water discharge cylinder 180 projecting left and right reciprocates linearly in the direction of the arrow M. At this time, according to the same principle as that described in the above-described embodiment, the speed of the core and the water discharge cylinder 180 is slow when moving in the right direction, and the speed is high when moving in the left direction. Therefore, if a water discharge nozzle such as a shower nozzle is provided at the tip of the water discharge cylinder 180, it is possible to configure a water discharge device in which the water discharge position repeatedly moves and the movement speed differs between the forward path and the return path.

  The inner structure will be described. As shown in FIGS. 9 to 11, the core composed of the core body 120 and the core cover 122 can move into the cylinder space formed by the housing body 102 and the housing cover 104. Is housed in. The core main body 120 and the core lid 122 are respectively connected to a water discharge cylinder 180 projecting left and right from the housing, and the inside of the housing is divided into a first pressure chamber 116 and a second pressure chamber 118 so as to function as a piston. It moves to. The water discharge casing 180 passes through the pressure chamber 116 or the pressure chamber 118, passes through the housing lid 104 or the housing body 102, and extends to the left or right side of the housing. Thereby, the core inner flow path 24 is communicated with the outside of the water discharge device 100 via the water discharge flow path 102.

  A fluid such as water is introduced into the pressure chambers 116 and 118 from the water inlets 112 and 114, respectively. A seal 126 is provided at a sliding portion between the core body 120 and the inner wall of the housing body 102 for smooth sliding while maintaining liquid tightness. In addition, a seal 184 is provided for the same purpose at the sliding portion between the water discharge cylinder 180 and the housing body 102 (housing lid 104). As materials for these seals 126 and 184, for example, Teflon (registered trademark), NBR (nitrile rubber), EPDM (ethylene propylene rubber), or POM (polyacetal) can be used. Note that “liquid-tight” as used herein only needs to ensure a state sufficient to cause a pressure difference between the left and right pressure chambers.

  Next, the structure of the core will be described. A core inner passage 124 is formed by combining the core lid 120 with the core body 120, and the core inner passage 124 communicates with the water discharge passage 182 provided in the right and left water discharge cylinders 180. ing. The core body 120 and the core lid 122 are provided with inlets 132 and 134 for communicating the core internal flow path 124 and the pressure chambers 116 and 118. Then, valve bodies 352 and 354 are provided so as to cross the inner core flow path 124.

  In addition, the core lid 122 is provided with a leak inlet 512 that allows the core inner flow path 124 and the pressure chamber 116 to communicate with each other. The core main body 120 includes the core inner flow path 124, the pressure chamber 118, and the like. A leakage port 514 is provided for communicating the. The size of the inlet 512 is larger than the size of the inlet 514, and therefore the flow resistance of the inlet 512 is smaller than the flow resistance of the inlet 514. Note that the flow path resistances of the leakage ports 512 and 514 are larger than the flow path resistances of the introduction ports 132 and 134.

  As shown in FIG. 11, the left and right valve bodies 352 and 354 are connected to each other with the leaf spring 160 interposed therebetween, and are installed so as to be movable left and right through the introduction ports 132 and 134. The leaf spring 160 is supported by the core body 120 in a state in which both ends thereof are pressed toward each other, and is curved so that the central portion is convex on the right side and convex on the left side. Thus, the two states of the curved state become the stable state. The valve bodies 352 and 354 move relative to the core via the leaf spring 160. The valve bodies 352 and 354 are biased by the compressed leaf spring 160, and selectively control the introduction ports 132 and 134 to either the fully open state or the fully closed state.

  FIG. 12 is a perspective view showing these valve bodies. Ribs 353 are formed on the valve bodies 352 and 354, and the valve bodies 352 and 354 are configured to move coaxially with respect to the inlets 132 and 134. When the valve bodies 352 and 354 are moved away from the core lid 122 and the core main body 120, the groove portions 355 provided between the ribs 353 serve as openings of the inlet ports 132 and 134, thereby allowing the fluid flow path. Form.

  On the other hand, a magnet 370 is embedded in the core. Correspondingly, magnets (or ferromagnetic bodies) 374 and 372 are embedded in the housing main body 102 and the housing lid 104, respectively. In the illustrated specific example, the magnets (or ferromagnetic bodies) 374 and 372 are provided in an annular shape so that the core can be rotated about the water discharge cylinder 180 as an axis.

  As illustrated in FIGS. 9 to 11, when the valve body 354 is urged away from the core body 120, the introduction port 134 is opened. On the other hand, when the valve body 352 is urged away from the core lid 122, the inlet 132 is opened. In this specific example, by applying an attractive force between the magnet 370 and the magnets (or ferromagnets) 372 and 374, the leaf spring 160 is reliably reversed and the valve bodies 352 and 354 are biased. Thus, the introduction ports 132 and 134 can be controlled to an alternative state of the fully open state or the fully closed state.

Hereinafter, the operation of the water discharging apparatus according to this example will be described.
FIG. 13 is a schematic diagram showing the reciprocating linear motion of the water discharging device of this example. Also in this specific example, the core reciprocates linearly as in the water discharging device shown in FIGS. That is, in the state shown in FIG. 13A, the valve bodies 352 and 354 are urged to the right side by the urging force of the leaf spring 160, the introduction port 132 is closed, and the introduction port 134 is opened. When a fluid such as water is supplied to the water inlets 112 and 114 at substantially the same pressure in this state, the water introduced into the pressure chamber 118 from the water inlet 114 as indicated by the arrow B is indicated by the arrows C and G. As described above, the air flows into the core inner flow path 124 from the inlet 134 and the leak inlet 514, and flows out as indicated by arrows D and E through the water discharge flow paths 182 and 182 communicating with the left and right.

  On the other hand, as shown by the arrow A, the outflow path of the water introduced from the water inlet 112 into the pressure chamber 116 is only the path shown by the arrow F, that is, the path passing through the leakage port 512. At this time, the flow path resistance of the path represented by the arrow F is larger than the flow path resistance of the parallel path including the path represented by the arrow C and the path represented by the arrow G. On the other hand, since the flow path resistances of the water inlet 112 and the water inlet 114 are equal, the pressure in the pressure chamber 116 becomes higher than the pressure in the pressure chamber 118, and the core is pushed and moved in the direction of the arrow M.

  At this time, since the inlet 512 is larger than the inlet 514, the amount of water leaking from the pressure chamber 116 through the inlet 512 when the inlet 132 is closed by the valve body 352, as shown in FIG. As shown in FIGS. 13B and 13C, when the inlet 134 is closed by the valve body 354, the amount of water leaks from the pressure chamber 118 through the leak inlet 514. As a result, the amount of water that contributes to the volume expansion of the pressure chamber 116 when the introduction port 132 is closed is less than the amount of water that contributes to the volume expansion of the pressure chamber 118 when the introduction port 134 is closed. The moving speed when moving in the right direction is smaller than the moving speed when moving in the left direction.

  As shown in FIG. 13A, when the core moves in the direction of the arrow M, the volume of the pressure chamber 116 increases and the volume of the pressure chamber 118 decreases accordingly. For this reason, the fluid in the pressure chamber 118 is pushed out by the amount of the fluid flowing into the pressure chamber 116 along the path indicated by the arrow A, and is included in the water discharge amount of the fluid flowing out from the flow path 182.

  When the core continues to move, the valve body 354 comes into contact with the inner wall of the housing body 102 and is pushed against the core. At this time, an attractive force acts between the magnet 370 built in the core and the magnet (or ferromagnetic material) 374 provided in the housing main body 102, and the core is pulled to the right side. Due to the synergy of these actions, the core moves in the right end direction of the housing body 102 and the valve body 354 is pushed in the left direction relative to the core, so that the bending direction of the leaf spring 160 is reversed, As shown in FIG. 13B, the valve bodies 352 and 354 are biased toward the left side. That is, the introduction port 132 is opened and the introduction port 134 is closed.

  In the state shown in FIG. 13B, the fluid introduced into the pressure chamber 116 from the water inlet 112 as shown by the arrow A flows out through the inlet 132 and the leakage port 512. On the other hand, as shown by the arrow B, the fluid introduced into the pressure chamber 118 from the water inlet 114 is closed only through the leak inlet 514 as shown by the arrow G because the inlet 134 is closed. Leaked. Therefore, the right channel resistance, that is, the channel resistance of the path through the inlet 514 represented by the arrow G is the left channel resistance, ie, the path through the inlet 132 represented by the arrow H and the inlet 512 represented by the arrow F. It becomes larger than the total flow path resistance of the path via. On the other hand, the channel resistance of the water inlet 112 and the channel resistance of the water inlet 114 are equal to each other. As a result, the pressure in the pressure chamber 118 becomes higher than the pressure in the pressure chamber 116, and the core starts moving toward the left side as indicated by the arrow M. At this time, since the leakage port 512 is larger than the leakage port 514, the moving speed of the core moving in the left direction is relatively high for the same reason as described above.

  When the core moves, as shown in FIG. 13C, the valve body 352 moves to a position where it abuts against the inner wall of the housing lid 104. The core further moves from this state and starts to push the leaf spring 160. At the same time, the core is further pulled to the left by the attractive force acting between the magnet 370 built in the core and the magnet (ferromagnetic material) 372 provided in the housing lid 104. As a result, the valve body 352 is pushed against the core, the bending direction of the leaf spring 160 is reversed, and the valve bodies 352 and 354 are biased in the opposite direction. As a result, a force in the right direction acts on the core, and the core starts to move in the right direction. Thereafter, the operations shown in FIGS. 13A to 13C are repeated.

  As described above, according to this specific example, the attractive force acting between the magnet 370 built in the core and the magnets (or ferromagnetic bodies) 374 and 372 provided in the housing main body 102 and the housing lid 104 is reduced. By using it, the opening difference of the inlet port is changed across the neutral state, and the pressure difference is reversed by reversing the magnitude relationship between the left channel resistance and the right channel resistance. The child can be moved repeatedly left and right.

Next, the operation of the control means in this example will be described in more detail.
FIG. 14 is a schematic diagram for explaining the operation of the control means in this example. That is, FIG. 5A shows the moment when the valve body 354 contacts the inner wall of the housing body 102. At this time, the leaf spring 160 is curved so that the right side is convex toward the right side, whereby the valve bodies 352 and 354 are urged to the right side, and the opening degree of the introduction port 134 is larger than its neutral opening degree, The opening degree of the introduction port 132 is smaller than the neutral opening degree. Therefore, the flow path resistance of the introduction port 134 is smaller than that in the neutral state, and the flow path resistance of the introduction port 132 is larger than that in the neutral state. For this reason, the left channel resistance is larger than the right channel resistance, and the pressure on the left side of the core (pressure in the pressure chamber 116) is larger than the pressure on the right side of the core (pressure in the pressure chamber 118). Thereby, the water pressure toward the right side is applied to the core.

  From this state, when the core moves further to the right side by overcoming the urging force of the leaf spring 160, the valve body 354 is pushed to the left side relative to the core, as shown in FIG. 14B. The opening of the introduction port 132 increases, and the opening of the introduction port 134 decreases. Thereby, the opening degree of the inlets 132 and 134 becomes close to a neutral opening degree. As a result, the rightward force applied to the core is reduced. At this time, the leaf spring 160 is also pushed and deformed relatively to the left side, but at this point, it cannot be reversed yet and the valve bodies 352 and 354 remain biased to the right side. Therefore, the valve body 354 presses the inner wall of the housing main body 102 to the right, and the core is biased to the left by the reaction received from the housing main body 102 accordingly. For this reason, if the magnets 370 and 374 are not provided, the rightward force applied to the core by the fluid balances with the leftward reaction force received from the housing body 102, and the core stops. is there.

  On the other hand, in this specific example, the magnets 370 and 374 are temporarily provided by the attractive force acting between the magnet 370 built in the core and the magnet (or ferromagnetic material) 374 provided in the housing main body 102. If not, you can pull the core to the right beyond the position where it stops. That is, as shown in FIG. 14B, the core can be drawn to the right side by applying a magnetic force when the introduction port 132 starts to open due to the operation of the valve body 352.

When the core is pulled to the right side, the leaf spring 160 reaches a substantially S-shaped metastable state (hereinafter referred to as “the middle state of the leaf spring”), and beyond that, FIG. Start reversing to the left as shown in). 14D, the inlet port 132 is fully opened by the operation of the valve body 352, and the introduction port 134 is closed by the operation of the valve body 354. A state is formed. As a result, the opening degree of the introduction port 132 is increased and the opening degree of the introduction port 134 is decreased. Therefore, the flow path resistance of the introduction port 132 is decreased and the flow path resistance of the introduction port 134 is increased. Resistance becomes larger than left channel resistance.
At this time, the attractive force between the magnet 370 and the magnet 374 has such a force that the core can be attracted from the neutral state after the valve body 352 collides with the wall surface 102 to the intermediate state of the leaf spring. Need to be.

After this, since a pressure difference is generated on both sides of the core, the core moves toward the left side. At this time, it is necessary to set the driving force due to the pressure difference to exceed the attractive force between the magnet 370 and the magnet 374.
Similarly to the above-described operation, when the valve body 352 comes into contact with the inner wall of the housing lid 104, the left channel resistance becomes larger than the right channel resistance due to the action of the leaf spring 160.

  As described above, according to this specific example, the attractive force of the magnet 370 and the magnets (or ferromagnetic bodies) 372 and 374 is used to attract the cores, thereby causing the valve bodies 352 and 354 to move toward the core. The leaf spring 160 can be reliably reversed by pushing. That is, the state of the valve bodies 352 and 354 is controlled using the attractive force of the magnet, the opening degree difference between the introduction ports 132 and 134 is changed across the neutral state, and the magnitude relationship between the left channel resistance and the right channel resistance. By reversing and reversing the pressure difference, smooth reciprocating linear motion can be realized.

  Further, by making the moving direction of the core, the movable direction of the valve bodies 352 and 354, the urging direction of the leaf spring 160, and the acting direction of the attractive force of the magnets 370, 372 and 374 substantially the same Therefore, the moving force of the core having a large pressure receiving area can be used effectively, and smooth and stable operation is possible. That is, the movement operation of the core and the opening degree control operation are linked, and the opening degree control operation of the introduction ports 132 and 134 for reversing the core is made reliable and easy. Control means are realized.

  At this time, the amount of deflection when the leaf spring 160 is in a stable state, that is, the virtual plane connecting both ends of the leaf spring 160 and the portion where the valve bodies 352 and 354 at the center of the leaf spring 160 are connected. The distance between them needs to be larger than the distance between the center line 1000 and the neutral line 1001. Further, by making the amount of deflection larger than the distance between the core in the neutral state and the valve body far from the core, the respective inlets can be completely closed. Thereby, the driving force applied to the core can be increased.

  Further, in this case, even in the case where water discharge is started from a state where the core is stopped near the middle of the movement stroke, the valve bodies 352 and 354 are controlled by the leaf spring 160 at the time of water discharge start. One of the introduction ports 132 and 134 is alternatively open, and a pressure difference is formed on both sides of the core, so that a stable initial operation can be started. That is, the state in which the opening of the introduction port 132 is larger than the neutral opening and the opening of the introduction port 134 is smaller than the neutral opening, and the opening of the introduction port 134 is larger than the neutral opening. The state in which the opening is large and the opening of the introduction port 132 is smaller than the neutral opening can be held alternatively.

  In the case of the water discharging device of this specific example, as shown in FIG. 9 and the like, the seal 184 between the water discharging cylinder 180 and the housing main body 102 (housing lid 104) is provided on the housing main body 102 (housing lid 104) side. Therefore, the size in the stroke direction can be shortened and the size can be reduced.

  In this specific example, the valve bodies 352 and 354 are brought into contact with the inner wall of the housing when the core is reversed, but the present invention is not limited to this. For example, a magnet is provided on the valve bodies 352 and 354, while a magnet is also provided on the inner wall of the housing, and the valve bodies 352 and 354 are stopped relative to the housing using a repulsive force acting between them. It is also possible. That is, in this case, in a state corresponding to FIGS. 14A to 14C, the valve body 354 does not come into contact with the inner wall of the housing 102, and from the inner wall of the housing 102 due to the repulsive force of a magnet (not shown). It is in a state of being separated by a predetermined distance. In this way, the core can be reversed without contact. In this case, the moving range of the core is not a space where the core should have moved if there is no magnet, but a space where the core actually moves under the action of the magnet.

  On the other hand, in this specific example, the thrust obtained in the reciprocating linear motion is determined by the product of the pressure of the fluid loaded on the core and the pressure receiving area of the core. Therefore, if the pressure receiving area of the core is increased, it is possible to obtain a large thrust according to the increase.

  9 to 11 and 14 show specific examples in which a circular core is accommodated in a substantially cylindrical space provided in the housing, the present invention is not limited to this. For example, the internal space of the housing main body 102 may be a prismatic shape or a flat columnar shape, and the core can have various shapes according to these shapes.

  Moreover, the outer peripheral shape of the water discharge cylinder 180 does not need to be circular, and may be a polygonal shape or a flat shape. Furthermore, the water discharge cylinder 180 does not need to be provided at the center of the core, and may be provided eccentric from the center of the core. If it does in this way, size reduction of a core is easy and a water discharging apparatus can be reduced in size.

  In addition, when the housing inner space is formed in a columnar shape and the water discharge cylindrical body 180 is provided at the center of the cylindrical core as in this specific example, the water discharge cylindrical body 180 can be rotated. That is, when the water discharge nozzle is provided at the tip of the water discharge cylinder 180, the water discharge position can be repeatedly changed by the reciprocating linear motion of the core, and at the same time, by rotating the water discharge cylinder 180, It is also possible to change the water discharge direction. For example, by providing a cam structure composed of protrusions and grooves, the core and the water discharge cylinder can be rotated around the central axis as the core moves. In this way, a wide variety of water discharge modes according to the user's preference can be realized.

Next, as a second specific example of the first embodiment, a water discharger having a control unit combining a magnet and a leaf spring and reciprocatingly rotating will be described.
FIG. 15 thru | or FIG. 18 is a schematic diagram showing the principal part of the water discharging apparatus concerning the 2nd specific example. That is, FIG. 15 is a perspective view of the water discharging device of this example, FIG. 16 is a perspective cutaway view, FIG. 17 is a longitudinal sectional view, and FIG. 18 is a sectional view taken along line BB in FIG. .

  As shown in FIGS. 15 to 18, in the water discharging apparatus 200 according to the second specific example, a housing formed by the housing main body 202 and the housing lids 203 and 204 is provided, and is directed in one direction from the housing. The water discharge cylinder 280 protrudes. The water discharge cylinder 280 has a hollow structure having a water discharge channel 282 inside, and is open at the tip. When a fluid such as water is introduced into the water inlets 212 and 214 provided in the housing body 202, the water discharge cylinder 280 reciprocates in the direction of the arrow M. Therefore, if a water discharge nozzle such as a shower nozzle is provided at the tip of the water discharge cylinder 280, a water discharge device in which the water discharge direction changes repeatedly can be formed.

  In this specific example, as shown in FIG. 18, the size of the leakage port 524 is larger than the size of the leakage port 522. Accordingly, when the core rotates from the water inlet 212 side toward the water inlet 214 side according to the same principle as that described in the first embodiment, the rotation speed is relatively large, and the water inlet 214 When rotating from the side toward the water inlet 212, the rotation speed becomes relatively small.

  Hereinafter, the internal structure of the water discharge device 200 will be described. As shown in FIGS. 16 to 18, the core comprising the core body 220 and the core cover 222 is inserted into the water discharge cylinder 280 in the fan-shaped housing space formed by the housing body 202 and the housing lids 203 and 204. It is housed so as to be rotatable as a central axis. That is, the core is connected to a water discharge cylinder 280 penetrating through the housing, and is rotated by dividing the inside of the fan-shaped housing into a first pressure chamber 216 and a second pressure chamber 218. Fluids such as water are introduced into the pressure chambers 216 and 218 from the water inlets 212 and 214, respectively. Seals 227 are provided at sliding portions between the core body 220 and the housing main body 202 and the inner walls of the housing lids 203 and 204 for smooth sliding while maintaining liquid tightness. Further, a seal 226 is also provided for the same purpose at the sliding portion between the water discharge cylinder 280 and the housing lids 203 and 204. As materials for the seals 227 and 226, for example, Teflon (registered trademark), POM (polyacetal), or the like can be used.

  Next, the structure of the core will be described. Also in this specific example, the core includes the same control means as in the first specific example. That is, a core inner passage 224 is formed by combining the core body 220 with the core lid 222, and the core inner passage 224 communicates with the water discharge passage 282 provided in the water discharge cylinder 280. ing. The core body 220 and the core lid 222 are provided with introduction ports 232 and 234 that allow the core flow path 224 and the pressure chambers 216 and 218 to communicate with each other.

  In addition, the core body 220 and the core lid 222 are provided with inlets 522 and 524 that allow the core flow path 224 and the pressure chambers 216 and 218 to communicate with each other. The inlet 522 is smaller than the inlet 524, and therefore the flow resistance of the inlet 522 is greater than the flow resistance of the inlet 524. Note that the flow path resistances of the leakage ports 522 and 524 are larger than the flow path resistances of the inlets 232 and 234.

  As shown in FIGS. 16 and 17, the left and right valve bodies 452 and 454 are connected with the leaf spring 260 interposed therebetween, and the inlets 232 and 234 provided in the core body 220 and the core lid 222 are connected. It is installed so that it can penetrate and move left and right. The leaf spring 260 is supported by the core body 220 in a state in which both ends thereof are pressed toward each other, and is curved so that the central portion is convex on the right side and convex on the left side. Thus, the two states of the curved state become the stable state. The valve bodies 452 and 454 move relative to the core via the leaf spring 260. The valve bodies 452 and 454 alternatively control the introduction ports 232 and 234 to either the fully open state or the fully closed state by the compressed leaf spring 260. The shapes of the valve bodies 452 and 454 are as described above with reference to FIG.

  On the other hand, a magnet 470 is embedded in the core body 220. Correspondingly, magnets (or ferromagnetic bodies) 474 and 472 are embedded in the housing main body 202, respectively. As illustrated in FIGS. 16 and 18, when the valve body 454 is urged away from the core body 220, the introduction port 234 is opened. On the other hand, when the valve body 452 is urged away from the core lid 222, the inlet 232 is opened.

  Also in this specific example, by applying an attractive force between the magnet 470 and the magnets (or ferromagnetic bodies) 472 and 474, the leaf spring 260 is reliably reversed to bias the valve bodies 452 and 454, The inlets 232 and 234 are controlled to an alternative state of a fully open state or a fully closed state.

  FIG. 19 is a schematic diagram illustrating the reciprocating operation of the water discharging device of this example. In this specific example, the core body 220 reciprocates around the water discharge cylinder 280. First, FIG. 19A shows a state in which the valve bodies 452 and 454 are urged to the left by the leaf spring 260. At this time, the inlet 232 is closed and the inlet 234 is opened.

  When a fluid such as water is supplied to the water inlets 212 and 214 in this state, the water introduced into the pressure chamber 218 from the water inlet 214 as indicated by the arrow A is the inlet 234 as indicated by the arrows H and F. And from the leakage port 524 to the core inner flow path 224 and flows out through the water discharge flow path 282 as indicated by an arrow D. On the other hand, the water introduced into the pressure chamber 216 from the water inlet 212 as indicated by the arrow B passes through only the inlet 522 as indicated by the arrow G because the inlet 232 is closed. It flows into the path 224 in the core. At this time, the channel resistance of the channel represented by the arrow G is larger than the channel resistance of the channel represented by the arrows H and F. Further, the flow path resistances of the water inlet 214 and the water inlet 214 are equal. For this reason, the pressure in the pressure chamber 216 becomes higher than the pressure in the pressure chamber 218, and the core is pushed in the direction of the arrow M to rotate.

  At this time, since the leakage port 524 is larger than the leakage port 522, as shown in FIG. 19A, when the inlet 232 is closed by the valve body 452, the unit leaks from the pressure chamber 216 through the leakage port 522. As shown in FIGS. 19B and 19C, the amount of water per hour is based on the amount of water per unit time that leaks from the pressure chamber 118 through the leak inlet 524 when the inlet 234 is closed by the valve body 454. Will also increase. As a result, the amount of water per unit time contributing to the volume expansion of the pressure chamber 216 when the inlet 232 is closed is less than the amount of water contributing to the volume expansion of the pressure chamber 218 when the inlet 234 is closed. The moving speed when the core moves from the water inlet 212 side to the water inlet 214 side is smaller than the moving speed when the core moves in the opposite direction.

  As shown in FIG. 19A, when the core moves in the direction of arrow M, the volume of the pressure chamber 216 increases, and the volume of the pressure chamber 218 decreases accordingly. For this reason, the fluid in the pressure chamber 218 is also pushed out by the amount of fluid flowing into the pressure chamber 216 along the path indicated by the arrow B, and is included in the water discharge amount of the fluid flowing out from the flow path 282.

  When the core continues to rotate and the valve body 454 comes into contact with the inner wall of the housing main body 202 and is pressed against the core, the leaf spring 260 is also pressed in a direction that reverses its bending direction. At this time, an attractive force acts between the magnet 470 provided on the core main body 220 and the magnet (or ferromagnetic material) 474 provided on the housing main body 202, and the core attracts the inner wall of the housing main body 202. It is done. Then, the valve body 454 is further pushed, and the leaf spring 260 is pushed along with this, whereby the bending direction of the leaf spring 260 is reversed. Then, as shown in FIG. 19B, the introduction port 234 is closed by the valve body 454 and the introduction port 232 is fully opened by the valve body 452. The details of this control operation are the same as those described above with reference to FIG.

  In the state shown in FIG. 19B, the fluid introduced into the pressure chamber 216 from the water inlet 212 as indicated by the arrow B is the inlet 232 and the leakage port 522 as indicated by the arrows C and G. Flows into the core inner flow path 224 and flows out through the water discharge flow path 282 as indicated by the arrow D. On the other hand, as shown by the arrow A, the outflow path of the fluid introduced from the water inlet 214 to the pressure chamber 218 is only the leak inlet 524. At this time, the channel resistance of the channel represented by the arrow F is larger than the total channel resistance of the channels represented by the arrows C and G. Further, the channel resistances of the water inlet 212 and the water inlet 214 are equal. For this reason, the pressure in the pressure chamber 218 becomes higher than the pressure in the pressure chamber 216, and the core starts to rotate toward the right side as indicated by the arrow M. At this time, since the size of the leakage port 524 is larger than the size of the leakage port 522, the rotational speed of the core is relatively slow for the same reason as described above.

  When the core rotates, the valve body 452 contacts the inner wall of the housing body 202 as shown in FIG. At this time, an attractive force acts between the magnet 470 provided in the core and the magnet (or ferromagnetic material) 472 provided in the housing main body 202, and the core is attracted to the inner wall of the housing main body 202. Then, the valve body 452 is further pushed against the core, and the leaf spring 260 is pushed accordingly, whereby the bending direction of the leaf spring 260 is reversed. Then, similarly to the state shown in FIG. 19A, the introduction port 232 is closed by the valve body 452 and the introduction port 234 is opened by the valve body 454, and the core starts to rotate toward the left side. . Thereafter, the core continues to reciprocate by repeating the states shown in FIGS.

  As described above, also in this example, the leaf springs are pressed by pushing the valve bodies 452 and 454 by attracting the core body 220 by using the attractive force of the magnet 370 and the magnets (or ferromagnetic bodies) 372 and 374. 260 can be reliably reversed. That is, the state of the valve bodies 452 and 454 can be controlled using the attractive force of the magnet, and the opening degree of the inlet can be changed to reverse the magnitude relationship between the left channel resistance and the right channel resistance. As a result, the pressure difference between the pressure chambers 216 and 218 can be reversed to realize a smooth reciprocating rotational motion.

  Further, by making the rotation direction of the core, the movable direction of the valve bodies 452 and 454, the urging direction of the leaf spring 260, and the acting direction of the attractive force of the magnets 370, 372 and 374 substantially equal, Therefore, the moving force of the core having a large pressure receiving area can be effectively utilized, and smooth and stable operation is possible. That is, when the core approaches the inner wall of the housing body 202, the direction of movement of the core, the movable direction of the valve bodies 452, 454, the biasing direction of the leaf spring 260, and the attractive force of the magnets 370, 372, 374 By making the directions substantially the same, the rotation operation of the core and the opening control operation are linked, and the control operation for changing the opening of the inlets 232 and 234 for reversing the core is ensured and easy. It realizes a simple and compact valve body and control means.

  Further, in this case, even when starting the water discharge from a state where the core is stopped in the middle of the rotation stroke, etc., the valve bodies 452 and 454 are controlled by the leaf spring 260 at the time of the water discharge start. Thus, either one of the inlets 232 and 234 is alternatively opened, and a stable initial operation can be started by forming a pressure difference on both sides of the core. That is, the state in which the opening degree of the introduction port 232 is larger than the neutral opening degree and the opening degree of the introduction port 234 is smaller than the neutral opening degree, and the opening degree of the introduction port 234 is larger than the neutral opening degree. It is possible to selectively hold the state where the opening is large and the opening of the introduction port 232 is smaller than the neutral opening.

  Note that the stroke (rotation angle) of the rotational movement of the core in this specific example can be appropriately set according to the opening angle of the fan-shaped space of the housing body 202. Also in this specific example, the thrust obtained by the rotating operation is determined by the product of the pressure of the fluid applied to the core and the pressure receiving area of the core. Therefore, if the pressure receiving area of the core is increased, it is possible to obtain a large thrust according to the increase.

  Further, in FIGS. 15 to 19, the specific example in which the water discharge cylinder 280 is provided to protrude only on one side of the housing is shown, but the present invention is not limited to this, and the first specific example has been described above. Similarly to the above, the water discharge cylinder 280 may be protruded on both sides of the housing and discharged from each of the water discharge cylinders 280.

  Also in this specific example, the valve bodies 452 and 454 are brought into contact with the inner wall of the housing when the core is reversed, but the present invention is not limited to this. For example, magnets are provided on the valve bodies 452 and 454, while magnets are also provided on the inner wall of the housing main body 202, and the valve bodies 452 and 454 are attached to the inner wall of the housing main body 202 using a repulsive force acting between them. It is also possible to stop relatively. That is, in this case, when the core is reversed, the valve bodies 452 and 454 do not come into contact with the inner wall of the housing main body 202 and are separated from the inner wall of the housing main body 202 by a predetermined distance by the repulsive force of the magnet. There will be. In this way, the core can be reversed without contact with A, and the valve bodies 452 and 454 can be smoothly slid regardless of the shape of the contact surface of the inner wall of the housing main body 202.

  In the above, the water discharging apparatus which has the control means which combined the leaf | plate spring and the magnet was demonstrated as the 1st and 2nd specific example of the 1st Embodiment of this invention. Next, as a third to fifth specific examples of the first embodiment, a water discharger having a control unit that combines a leaf spring and a slide bar will be described.

  FIG. 20 thru | or FIG. 23 is a schematic diagram showing the principal part of the water discharging apparatus which concerns on the 3rd specific example of 1st Embodiment. That is, FIG. 20 is a perspective view of the water discharging device according to this example, FIG. 21 is a perspective cutaway view thereof, FIG. 22 is a sectional view, and FIG. 23 is a sectional view taken along line AA in FIG. . As shown in FIGS. 20 to 23, the water discharge device 300 according to this example has a structure similar to that of the first example. Therefore, the same elements as those described above with reference to FIGS. 8 to 14 are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the water discharging apparatus 300 of this specific example, a housing formed by the housing main body 102 and the housing lid 104 is provided, and the water discharging cylindrical body 180 protrudes from the housing to the left and right. Then, when a fluid such as water is introduced into the water inlets 112 and 114 provided in the housing main body 102, the water discharge cylindrical body 180 projecting left and right repetitively moves in the direction of the arrow M. At this time, since the size of the inlet 514 (see FIG. 21) is smaller than the size of the inlet 512 (see FIG. 21), the moving speed when the core moves from the inlet 114 toward the inlet 112 is The moving speed when the core moves from the water inlet 112 toward the water inlet 114 becomes larger.

  In this specific example, a leaf spring and a slide bar are provided on the core as control means. That is, a core inner passage 124 is formed by combining the core lid 120 with the core body 120, and this core inner passage 124 is connected to the water discharge passage 182 provided in the right and left water discharge cylinders 180. Communicate. The core body 120 and the core lid 122 are provided with inlets 132 and 134 for communicating the core internal flow path 124 and the pressure chambers 116 and 118. Then, main valves 142 and 144 and slide bars 146 and 148 are provided so as to cross the core inner flow path 124.

  In addition, the core body 120 is provided with a leak inlet 514 for communicating the core internal flow path 124 and the pressure chamber 118, and the core lid 122 has the core internal flow path 124, the pressure chamber 116, and the like. A leak inlet 512 is provided for communicating the. The leak inlet 512 is larger than the leak inlet 514, and thus the flow path resistance of the leak inlet 512 is smaller than the flow path resistance of the leak inlet 514. Note that the flow path resistances of the leakage ports 512 and 514 are larger than the flow path resistances of the introduction ports 132 and 134.

  FIG. 24 is a perspective view showing these main valves and slide bars. As shown in FIG. 24, the left and right main valves 142 and 144 are connected by a connecting rod 149 and installed so as to be movable left and right through the inlets 132 and 134 provided in the core body 120 and the core lid 122. Has been. That is, the main valves 142 and 144 as valve bodies are installed so as to be movable left and right with a predetermined stroke with respect to the core body 120. Ribs 143 are formed on the main valves 142 and 144, and the main valves 142 and 144 are configured to move coaxially with the introduction ports 132 and 134. When the main valves 142 and 144 move away from the core lids 122 and 120, the grooves 145 provided between the ribs 143 serve as openings of the inlets 132 and 134 to form a fluid flow path. Then, slide bars 146 and 148 that pass through the main valves 142 and 144 coaxially are installed so as to be movable left and right. That is, the slide bars 146 and 148 are installed so as to be movable to the left and right with a stroke longer than the operation stroke of the main valves 142 and 144.

  As illustrated in FIGS. 21 to 23, when the main valve 144 moves away from the core body 120, the introduction port 134 is opened. On the other hand, when the main valve 142 moves away from the core lid 122, the introduction port 132 is opened. These inlets 132 and 134 are both in communication with the core inner channel 124. That is, the introduction port 132 communicates the pressure chamber 116 in the housing and the core inner flow path 124, and the introduction port 134 communicates the pressure chamber 118 and the core inner flow path 124.

  And the operation | movement of the main valves 142 and 144 which change the opening degree of these inlet ports 132 and 134 is determined by the slide bars 146 and 148 installed coaxially. That is, as shown in FIG. 23, the left and right slide bars 146 and 148 are connected with the compressed leaf spring 160 interposed therebetween, and receive a biasing force toward the right end or the left end depending on the bending direction of the leaf spring 160. . The leaf spring 160 is supported at both ends by the core body 120, and the slide bars 146 and 148 move relative to the core body 120 via the leaf spring 160. The main valves 142 and 144 receive this urging force from the slide bars 146 and 148 to place the introduction ports 132 and 134 in an alternative state of a fully open state or a fully closed state. That is, the slide bars 146 and 148 and the leaf spring 160 act as control means, and control the main valves 142 and 144 which are valve bodies.

Hereinafter, the operation of the water discharging apparatus of this specific example will be described.
FIG. 25 is a schematic diagram for explaining the operation of the water discharge device of this example. That is, this figure shows a state in which the slide bars 146 and 148 are urged toward the right side by the action of the leaf spring 160. At this time, the main valves 142 and 144 are also urged toward the right side by the slide bar 146, so that the inlet 132 is closed and the inlet 134 is opened.

  When a fluid such as water is supplied to the water inlets 112 and 114 in this state, the water introduced into the pressure chamber 118 from the water inlet 114 as shown by the arrow B is introduced into the inlet port as shown by the arrows C and G. 134 and the leakage port 514 flow into the core inner flow path 124 and flow out as indicated by arrows D and E through the water discharge flow paths 182 and 182 communicating with the left and right.

  On the other hand, the water introduced into the pressure chamber 116 from the water inlet 112 as indicated by the arrow A flows out only through the leakage port 512 indicated by the arrow F through the path. At this time, the channel resistance of the channel represented by the arrow F is larger than the total channel resistance of the channels represented by the arrows C and G. Further, the channel resistances of the water inlet 112 and the water inlet 114 are equal. For this reason, the pressure in the pressure chamber 116 becomes higher than the pressure in the pressure chamber 118, and the core is pushed and moved in the direction of the arrow M.

  When the core moves in the direction of arrow M, the volume of the pressure chamber 116 increases, and the volume of the pressure chamber 118 decreases accordingly. For this reason, the fluid in the pressure chamber 118 is pushed out by the amount of the fluid flowing into the pressure chamber 116 along the path indicated by the arrow A, and is included in the water discharge amount of the fluid flowing out from the flow path 182.

  FIG. 26 is a schematic diagram illustrating the reciprocating operation of the water discharging device of this example. That is, FIG. 25A is the same as the state described above with reference to FIG. 25, and the core moves to the right as indicated by the arrow M. When the slide bar 148 comes into contact with the inner wall of the housing main body 102 and is pressed against the core, the bending direction of the leaf spring 160 is reversed, and the slide bar 148 slides as shown in FIG. The bars 146 and 148 are biased toward the left side. Then, when the slide bar 148 pushes the main valve 144, the main valves 142 and 144 also move to the left. That is, the introduction port 132 is opened and the introduction port 134 is closed.

  In the state shown in FIG. 26B, the fluid (for example, water) introduced into the pressure chamber 116 from the water inlet 112 as shown by the arrow A is introduced into the inlet as shown by the arrow H and the arrow F. It flows into the core inner channel 124 from the 132 and the leakage port 512, and flows out as indicated by arrows D and E through the water discharge channels 182 and 182. On the other hand, as shown by the arrow B, the fluid introduced from the water inlet 114 into the pressure chamber 118 flows out only through the leak inlet 514 because the inlet 134 is closed. As a result, the right channel resistance becomes larger than the left channel resistance, and the pressure in the pressure chamber 118 becomes higher than the pressure in the pressure chamber 116. As a result, the core starts moving toward the left side as indicated by the arrow M.

  When the core continues to move, the slide bar 146 moves to a position where it abuts against the inner wall of the housing lid 104 as shown in FIG. When the core further moves from this state and the slide bar 146 is pushed against the core, the bending direction of the leaf spring 160 is reversed and biased to the right side. Then, similarly to the state shown in FIG. 26A, the introduction port 132 is closed and the introduction port 134 is opened, and the core starts moving toward the right side.

  As described above, according to the present specific example, the core main body 120 of the core body 120 is provided by providing the core with the main valves 142 and 144 as the valve bodies and the control means including the slide bars 146 and 148 and the leaf spring 160. According to the movement, the opening difference between the introduction ports 132 and 134 can be appropriately changed across the neutral state, and the core can be operated repeatedly left and right. The stroke of the reciprocating motion of the core in the water discharging device of this specific example can be appropriately set according to the length of the housing body 102 and the thickness (width) of the core.

  FIG. 27 is a diagram showing a difference in moving speed depending on the moving direction of the core. FIG. 27A shows a state in which the core is moving in the right direction relative to the housing, and FIG. It shows a state of moving in the direction. As described above, in the state shown in FIG. 26A, since the inlet 132 is closed by the main valve 142, the pressure in the pressure chamber 116 becomes higher than the pressure in the pressure chamber 118, and the core moves to the right. Moving. On the other hand, in the state shown in FIG. 26B, since the inlet 134 is closed by the main valve 144, the pressure in the pressure chamber 118 becomes higher than the pressure in the pressure chamber 116, and the core moves to the left. . At this time, since the size of the leakage port 512 is larger than the size of the leakage port 514, the moving speed when the core moves in the right direction as shown in FIG. As shown in (b), the moving speed when the core moves to the left is relatively high.

  Next, the operation of the control means in this example will be described in more detail. FIG. 28 is a schematic diagram for explaining the operation of the control means in this example. That is, FIG. 6A shows a state in which the leaf spring 160 is curved so that the right side is convex and the slide bars 146 and 148 are urged in this direction. At this time, the introduction port 132 is closed by the main valve 142 and the introduction port 134 is opened by the main valve 144.

  When the core moves to the right side in this state, the slide bar 148 comes into contact with the inner wall of the housing as shown in FIG. Since a pressure difference acts on the core, the core moves further to the right in a state where the slide bar 148 is in contact with the inner wall of the housing, and the state shown in FIG. In other words, the biasing force of the leaf spring 160 is overcome and the relative position between the core and the slide bar 148 is changed, and the slide bar 148 is pushed against the core. As a result, the leaf spring 160 is also pushed and deformed to the left side to be in a substantially S-shaped state as illustrated in FIG. At this time, a pressure difference acts on the main valves 142 and 144 in the same manner as the core, and the open / close state of the inlets 132 and 134 is not changed from the state shown in FIG.

  Thereafter, when the slide bar 148 is further pushed against the core by further moving the core, as shown in FIG. 28C, the bending direction of the leaf spring 160 becomes convex on the left side. Inversion starts and the slide bars 146 and 148 are urged to the left. Then, as shown in FIG. 28 (d), the main valves 142 and 144 are moved to the left side by the urging force of the leaf spring 160, the introduction port 132 is fully opened, and the introduction port 134 is fully closed.

  As described above, in this specific example, the direction of bending of the compressed leaf spring 160 is appropriately reversed by the slide bars 146 and 148, and the main valves 142 and 144 are operated by using the biasing force, thereby introducing the inlet port. Alternatively, 132 and 134 are controlled to be either fully open or fully closed. That is, by using the biasing force of the leaf spring 160, the opening difference between the left and right inlets 132 and 134 is reliably formed for the reversal of the core.

  The mechanism of this example that controls the main valves 142 and 144 via the slide bars 146 and 148 has an extremely important role in the smooth operation of the water discharge device of this example. That is, the compressed leaf spring 160 is in a stable state in which the central portion is curved so as to protrude rightward or leftward, but as shown in FIG. , The leaf spring 160 may be in the middle state. In this intermediate state, the leaf spring 160 does not generate much urging force to the left or right. Therefore, in this state, if the opening of the inlets 132 and 134 becomes a neutral opening, fluid flows from the inlets 132 and 134 on both sides of the core, the pressure difference disappears, and the movement of the core stops. End up. That is, if the timing of starting the operation of the main valves 142 and 144 is earlier than the timing at which the leaf spring 160 reverses beyond the intermediate state, the operation of the core may stop.

  On the other hand, according to the present specific example, by providing the slide bars 146 and 148 and adjusting the strokes as appropriate, the main valves 142 and 144 are still in the middle state as shown in FIG. Without moving, the core is under pressure and can keep moving. Then, the main valves 142 and 144 can start moving when the leaf spring 160 starts reversing beyond the intermediate state. That is, the operation start timing of the main valves 142 and 142 can be synchronized with the reversal timing of the leaf spring 160.

  In other words, the leaf spring 160 is reversed before the opening difference sufficient to move the core disappears, and the reversing force (biasing force) moves the main valves 142 and 144 via the slide bars 146 and 148 to introduce them. The opening degree difference between the mouths 132 and 134 can be changed to an opening degree difference sufficient to move the core in the reverse direction. In this way, the problem that the opening of the inlets 132 and 134 becomes a neutral opening when the leaf spring 160 is in a neutral state and the core stops is solved, and smooth repetitive motion can be realized.

  Further, in this case, even when starting the water discharge from a state where the core is stopped near the middle of the moving stroke, the main valves 142 and 144 are controlled by the leaf spring 160 at the time of the water discharge start. One of the introduction ports 132 and 134 is alternatively open, and a pressure difference is formed on both sides of the core, so that a stable initial operation can be started. That is, the state in which the opening of the introduction port 132 is larger than the neutral opening and the opening of the introduction port 134 is smaller than the neutral opening, and the opening of the introduction port 134 is larger than the neutral opening. The state where the opening is large and the opening of the introduction port 132 is smaller than the neutral opening can be held alternatively. At this time, the amount of deflection of the leaf spring 160 must be set larger than the distance between the center line 1000 and the neutral line 1001.

  As described above, also in this specific example, the moving direction of the core, the moving direction of the main valves 142 and 144, the moving direction of the slide bars 146 and 148, and the biasing direction of the leaf spring 160 are made substantially the same. Therefore, there is no waste in the way the force works, the moving force of the core having a large pressure receiving area can be effectively used, and smooth and stable operation is possible. That is, the control operation for changing the opening difference between the introduction ports 132 and 134 for reversing the core across the neutral state by linking the movement operation of the core and the opening degree control operation reliably and easily. It realizes a simple and compact valve body and control means.

  In the specific examples shown in FIGS. 20 to 28, the slide bars 146 and 148 are brought into contact with the inner wall of the housing when the core is reversed, but the present invention is not limited to this. For example, a magnet is provided on the slide bars 146 and 148, while a magnet is provided on the inner wall of the housing, and the slide bars 146 and 148 are stopped relative to the housing by utilizing a repulsive force acting between them. It is also possible. That is, in this case, in the state corresponding to FIGS. 28A to 28C, the slide bars 146 and 148 do not contact the inner wall of the housing 102, and the repulsive force of the magnet (not shown) causes the housing 102 to It will be in the state away from the inner wall by a predetermined distance. In this way, the core can be reversed without contact. In this case, the moving range of the core is not a space where the core should have moved if there is no magnet, but a space where the core actually moves under the action of the magnet.

  On the other hand, in this specific example, the thrust obtained in the reciprocating linear motion is determined by the product of the pressure of the fluid loaded on the core and the pressure receiving area of the core. Therefore, if the pressure receiving area of the core is increased, it is possible to obtain a large thrust according to the increase.

  8 to 13 and 20 to 28 show specific examples in which a circular core is accommodated in a substantially cylindrical space provided in the housing, but the present invention is not limited to this. . For example, the internal space of the housing main body 102 may be a prismatic shape or a flat columnar shape, and the core can have various shapes according to these shapes.

  Moreover, the outer peripheral shape of the water discharge cylinder 180 does not need to be circular, and may be a polygonal shape or a flat shape. Furthermore, the water discharge cylinder 180 does not need to be provided at the center of the core, and may be provided eccentric from the center of the core. If it does in this way, size reduction of a core is easy and a water discharging apparatus can be reduced in size.

  In addition, when the housing inner space is formed in a columnar shape and the water discharge cylinder 180 is provided at the center of the cylindrical core as in this specific example, the water discharge cylinder 180 can be rotated. That is, when the water discharge nozzle is provided at the tip of the water discharge cylinder 180, the water discharge position can be repeatedly changed by the reciprocating linear motion of the core, and at the same time, by rotating the water discharge cylinder 180, It is also possible to change the water discharge direction. For example, by providing a cam structure composed of protrusions and grooves, the core and the water discharge cylinder can be rotated around the central axis as the core moves. In this way, a wide variety of water discharge modes according to the user's preference can be realized.

  Next, a fourth specific example of the first embodiment of the present invention will be described. The water discharge device according to this specific example is the same as the water discharge device according to the second specific example, that is, the water discharge device in which the core rotates in the housing having the fan-shaped internal space shown in FIGS. The control means in the third specific example, that is, the control means constituted by the leaf spring and the slide bar shown in FIGS. 20 to 27 is provided.

In this specific example, the contact angle between the slide bar and the inner wall of the housing body is always a right angle.
FIG. 29 is a schematic diagram for explaining the contact angle between the slide bars 146 and 148 and the inner wall of the housing main body 202 in this specific example. As shown in FIG. 29, in this specific example, the core body 220 performs a rotational movement about the water discharge housing 280 in the inner space of the housing body 202. The slide bars 146 and 148 are attached to the tip of the core body 220 so that reciprocal linear motion is possible. The longitudinal direction and the moving direction of the slide bars 146 and 148 are tangential directions of the rotational movement of the core body 220.

  In the water discharging apparatus according to this specific example, the core performs a rotational motion with the water discharging cylindrical body 280 as the central axis, so that the sliding direction of the slide bars 146 and 148 changes according to the rotation of the core. Accordingly, as shown in FIG. 29A, when the inner wall surface of the housing body 202 is planar, the sliding direction of the slide bars 146 and 148 with respect to the inner wall surface of the housing body 202 is not always vertical. There may be a case where a lateral stress is generated with respect to 146 and 148 and the sliding does not occur smoothly.

  On the other hand, as shown in FIG. 29B, when the contact surface of the inner wall of the housing main body 202 is formed in a curved concave shape, the slide bars 146 and 148 are always kept vertical according to the rotation of the core. It is possible to abut. That is, the slide bars 146 and 148 can be smoothly slid. Thereby, the control operation for reversing the core can be made smoother and more reliable.

  In this specific example, the slide bars 146 and 148 are brought into contact with the inner wall of the housing when the core is reversed, but the present invention is not limited to this. For example, the slide bars 146 and 148 are provided with magnets, while the inner wall of the housing body 202 is also provided with magnets, and the slide bars 146 and 148 are attached to the inner wall of the housing body 202 by utilizing the repulsive force acting between them. It is also possible to stop relatively. That is, in this case, in the state corresponding to FIG. 29A or 29B, the slide bars 146 and 148 do not contact the inner wall of the housing body 202, and the housing body is repelled by the repulsive force of a magnet (not shown). It is in a state separated from the inner wall 202 by a predetermined distance. In this way, the core can be reversed without contact, and the slide bars 146 and 148 can be smoothly slid regardless of the shape of the contact surface of the inner wall of the housing body 202.

  Further, in each of the above-described specific examples, two leak inlets are provided on both sides of the core and communicate with the pressure chambers on both sides of the core, respectively, but the present invention is not limited to this, and only on one side. A leak inlet may be provided. For example, in the water discharging apparatus 10 shown in FIG. 2, the smaller inlet 504 may not be provided. Also in this case, the amount of water leakage from the pressure chamber 16 when the opening degree of the introduction port 32 is minimized is greater than the amount of water leakage from the pressure chamber 18 when the opening degree of the introduction port 34 is minimized. In the movement of the core 20, it is possible to make a speed difference between the forward path and the return path.

Next, a second embodiment of the present invention will be described.
FIG. 30 is a cross-sectional view showing the water discharging device according to the present embodiment, where (a) shows a state in which the core is moving in the right direction, and (b) is in a state where the core is moving in the left direction. Indicates the state. As shown to Fig.30 (a) and (b), the water discharging apparatus which concerns on this embodiment is compared with the water discharging apparatus 300 (refer FIG. 22) which concerns on the 3rd example of the above-mentioned 1st Embodiment. A main valve 142a is provided in place of the main valve 142, and a difference is that a leak inlet such as the leak inlets 512 and 514 shown in FIG. 22 is not provided. The inner diameter of the main valve 142a is larger than the inner diameter of the main valve 144. As a result, the gap 151 between the main valve 142 and the slide bar 146 is larger than the gap 152 between the main valve 144 and the slide bar 148. However, the opening degree difference (flow path resistance difference) between the gap 151 and the gap 152 is smaller than the maximum opening degree difference (flow path resistance difference) formed between the introduction port 132 and the introduction port 134. . Thereby, the clearance gaps 151 and 152 play the role similar to the inlets 512 and 514 of the water discharging apparatus 300 shown in FIG. The configuration other than the above in the present embodiment is the same as that of the third specific example of the first embodiment described above.

Next, a third embodiment of the present invention will be described.
FIG. 31 is a cross-sectional view showing the water discharging apparatus according to the present embodiment, where (a) shows a state where the core is moving in the right direction, and (b) is a state where the core is moving in the left direction. Indicates the state. As shown in FIGS. 31 (a) and (b), the water discharge device 402 according to this embodiment is compared with the water discharge device 300 (see FIG. 22) according to the third specific example of the first embodiment described above. In addition, there is a difference in that a leak hole is not provided and a through hole 153 is formed in the core body 120 and the core lid 122 so as to communicate the pressure chamber 116 and the pressure chamber 118 with each other. . The shape of the through hole 153 is a wedge shape, and the inner diameter thereof continuously decreases from the end portion on the pressure chamber 116 side toward the end portion on the pressure chamber 118 side. The configuration other than the above in the present embodiment is the same as that of the third specific example of the first embodiment described above.

  In the present embodiment, since the through hole 153 is formed in the core main body 120 and the core lid 122, water flows from the high pressure side to the low pressure side of the pressure chambers 116 and 118. . At this time, since the shape of the through hole 153 is a wedge shape with the pressure chamber 116 opened, water easily flows from the pressure chamber 116 to the pressure chamber 118, and water hardly flows from the pressure chamber 118 to the pressure chamber 116. Therefore, as shown in FIG. 31 (a), when the inlet 132 is closed by the main valve 142, the amount of water leaking from the pressure chamber 116 to the pressure chamber 118 is as shown in FIG. 31 (b). When the inlet port 134 is closed by the valve 144, the amount of water leaking from the pressure chamber 118 to the pressure chamber 116 becomes larger. As a result, the amount of water per unit time contributing to the volume expansion of the pressure chamber 116 when the inlet 132 is closed is greater than the amount of water per unit time contributing to the volume expansion of the pressure chamber 118 when the inlet 134 is closed. Therefore, the moving speed when the core moves in the right direction is smaller than the moving speed when the core moves in the left direction. In the present embodiment, the center line 1000 and the neutral line 1001 coincide. Operations and effects other than those described above in the present embodiment are the same as in the third specific example of the first embodiment described above.

Next, a fourth embodiment of the present invention will be described.
FIG. 32 is a cross-sectional view showing the water discharging device according to the present embodiment, in which (a) shows a state where the core is moving in the right direction, and (b) is shown in which the core is moving in the left direction. Indicates the state. As shown in FIGS. 32 (a) and (b), the water discharge device 403 according to the present embodiment is compared with the water discharge device 300 (see FIG. 22) according to the third specific example of the first embodiment described above. In addition, there is no leakage port, and the outer shape of the core formed of the core body 120 and the core lid 122 is tapered. The outer shape of the core is small on the pressure chamber 116 side and large on the pressure chamber 118 side. As a result, a gap 154 is formed between the outer surface of the core body 120 and the core lid 112 and the inner surface of the housing body 102. The width of the gap 154 is large on the pressure chamber 116 side and small on the pressure chamber 118 side. The configuration other than the above in the present embodiment is the same as that of the third specific example of the first embodiment described above.

  In the present embodiment, since the gap 154 is formed between the outer surface of the core body 120 and the core lid 112 and the inner surface of the housing body 102, the pressure chambers 116 and 118 have a lower pressure from the higher pressure side. Water is flowing to the side. At this time, since the width of the gap 154 is large on the pressure chamber 116 side and small on the pressure chamber 118 side, water easily flows from the pressure chamber 116 to the pressure chamber 118, and water flows from the pressure chamber 118 to the pressure chamber 116. Difficult to flow. Therefore, as shown in FIG. 32A, when the inlet 132 is closed by the main valve 142, the amount of water leaking from the pressure chamber 116 to the pressure chamber 118 is as shown in FIG. When the inlet port 134 is closed by the valve 144, the amount of water leaking from the pressure chamber 118 to the pressure chamber 116 becomes larger. As a result, the amount of water per unit time contributing to the volume expansion of the pressure chamber 116 when the inlet 132 is closed is greater than the amount of water per unit time contributing to the volume expansion of the pressure chamber 118 when the inlet 134 is closed. Therefore, the moving speed when the core moves in the right direction is smaller than the moving speed when the core moves in the left direction. In the present embodiment, the center line 1000 and the neutral line 1001 coincide. Operations and effects other than those described above in the present embodiment are the same as in the third specific example of the first embodiment described above.

Next, a fifth embodiment of the present invention will be described.
FIG. 33 is a perspective view showing a seal of the water discharger according to the present embodiment. As shown in FIG. 33, the water discharging apparatus according to the present embodiment is provided with a leakage port as compared with the water discharging apparatus 300 (see FIG. 22) according to the third specific example of the first embodiment described above. Moreover, the point that the seal | sticker 426 is provided in the outer peripheral part of the core main body 120 instead of the seal | sticker 126 differs. The shape of the seal 426 is a ring shape, and a notch 427 is formed in one place. The shape of the cut 427 is a triangular shape opened to the pressure chamber 116 side. The configuration other than the above in the present embodiment is the same as that of the third specific example of the first embodiment described above.

  In this embodiment, since the notch 427 is formed in the seal 426 that ensures the liquid tightness between the core main body 120 and the housing main body 102, the pressure chambers 116 and 118 have a lower pressure from the higher pressure side. Water is flowing to the side. At this time, since the shape of the notch 427 is a triangular shape opened to the pressure chamber 116 side, water easily flows from the pressure chamber 116 to the pressure chamber 118, and water hardly flows from the pressure chamber 118 to the pressure chamber 116. Therefore, when the introduction port 132 is closed by the main valve 142, the amount of water leaking from the pressure chamber 116 to the pressure chamber 118 is changed from the pressure chamber 118 to the pressure chamber 116 when the introduction port 134 is closed by the main valve 144. More than the amount of water leaking. As a result, the amount of water that contributes to the volume expansion of the pressure chamber 116 when the introduction port 132 is closed is less than the amount of water that contributes to the volume expansion of the pressure chamber 118 when the introduction port 134 is closed. The moving speed when moving in the direction is smaller than the moving speed when moving in the left direction. In the present embodiment, the center line 1000 and the neutral line 1001 coincide.

  According to this embodiment, the simple means of forming a notch in the seal can give anisotropy to the leakage of water between the pressure chambers, and the moving speed of the core is made different between the forward path and the backward path. be able to. Operations and effects other than those described above in the present embodiment are the same as in the third specific example of the first embodiment described above.

  In the first to fifth embodiments described above, the size of the inlet provided in the core is a means for making the amount of leakage different between the left and right pressure chambers when the opening of the inlet is minimized. Are different from each other (first embodiment), and the gap between the main valve and the slide bar is different from left to right (second embodiment). A wedge-shaped through hole is formed in the core (third embodiment). (Embodiment), an example in which the outer shape of the core is tapered (fourth embodiment), and a triangular notch is formed on the seal (fifth embodiment). It is not limited. For example, the shape of the valve body or core may be devised to give a difference in the minimum opening of the inlet. For example, the introduction port may be completely closed by the valve body on one side, and a convex portion may be provided on the valve body or the core on the other side so that the introduction port is not completely closed.

Next, a sixth embodiment of the present invention will be described. This embodiment is an embodiment in which the water discharge device (see FIGS. 8 to 14) according to the first specific example of the first embodiment described above is applied to a shower device for cleaning a human body.
FIG. 34 is a perspective view showing the shower device in the present embodiment. As shown in FIG. 34, a water supply pipe 902 is embedded in a wall 901 of the shower room, and is connected to a branching portion 905 via a stop cock 903 and a temperature control valve 904. The water supply pipe 902 is branched into two by this branching portion 905 and connected to two supporting portions 906a and 906b attached to the wall 901, respectively. The support portions 906a and 906b support the housing main body 908 of the water discharging device 907 and supply water to the housing main body 908. That is, the support portions 906a and 906b also serve as the water inlet of the water discharge device 907. The size of the inlet on the support portion 906a side (corresponding to the inlet 512 shown in FIG. 9) in the water discharge device 907 (corresponding to the water discharge device 100 shown in FIG. 9) is the same as the inlet on the support portion 906b side ( This is larger than the size of the inlet 514 shown in FIG.

  Further, the housing main body 908 has a cylindrical shape whose central axis extends in the vertical direction, and is a shower bar cylinder. A cylindrical water discharge casing 909 extends from the housing main body 908 in both the upper and lower directions, and a water discharge section 910 is provided at the distal end of the water discharge casing 909 to form a shower head. A core 911 is provided in the housing main body 908. The core 911 is movable in the vertical direction within the housing main body 908.

  Next, the operation of this embodiment will be described. The core 911 reciprocates in the vertical direction with respect to the housing body 908 by the operation of the water discharge device described above. And in connection with this, the water discharging housing | casing 909 and the water discharging part 910 also reciprocate up and down. At this time, since the inner diameter of the support portion 906a is smaller than the inner diameter of the support portion 906b, the moving speed of the water discharger 910 is slow in the downward direction and fast in the upward direction. As a result, the water discharger 910 moves slowly downward with a large effect of removing dirt, quickly moves upward with a small effect of removing dirt, and quickly returns the shower head to the upper position. As a result, the human body can be efficiently washed while discharging water over a wide range.

  In addition, in this embodiment, although the example which uses the water discharging apparatus which concerns on the 1st specific example of 1st Embodiment as a water discharging apparatus was shown, this invention is not limited to this, For example, 1st implementation You may use the water discharging apparatus which concerns on either the 3rd specific example (refer FIG. 20 thru | or FIG. 28) of form, or 2nd thru | or 5th embodiment (refer FIG. 30 thru | or FIG. 33).

  Moreover, in this embodiment, although the example which uses a water discharging apparatus as a shower apparatus which wash | cleans the whole human body was shown, this invention is not limited to this, For example, it is a dishwasher, a dishwasher, and a hand-washing machine. It can also be used. Also in this case, the water discharger is slowly moved in the direction in which the cleaning effect is high, and quickly moved in the opposite direction, thereby discharging water to the entire object to be cleaned (for example, tableware or hands). High cleaning efficiency can be obtained.

Next, a seventh embodiment of the present invention will be described. This embodiment is an embodiment in which the water discharging device (see FIGS. 15 to 19) according to the fourth specific example of the first embodiment described above is applied to a massage shower device for a foot part of a human body.
FIG. 35 is a perspective view showing a massage shower apparatus in the present embodiment. As shown in FIG. 35, the massage shower apparatus 921 according to the present embodiment is installed in a shower room 925 including a bathtub 922, a water supply unit 923, a bath counter 924, and the like.

  The massage shower device 921 is retrofitted in the shower room 925, for example, and is installed below the bath counter 924. And the water supplied to the water supply part 923 is supplied in the massage shower apparatus 921 through the shower hose 926 and the shower connection part 927 pulled out from the water supply part 923. That is, the shower connecting portion 927 is a water inlet of the massage shower device 921. Further, the water supply unit 923 is provided with a temperature control valve 928, a switching valve 929, and a spout 930, and the switching valve 929 determines whether water is discharged from the spout 930, supplied to the massage shower apparatus 921, or stopped. It can be selected.

  The massage shower device 921 is provided with a housing main body 931, and a water discharge casing (not shown) extends from the housing main body 931 in one horizontal direction. This water discharge casing is configured to reciprocate and rotate. A foot nozzle portion 933 extending coaxially is connected to an end portion of the water discharge housing, and the foot nozzle 933 is provided with a plurality of swirling water discharge holes 934 along the longitudinal direction thereof. The turning water discharge hole 934 discharges water while turning the discharge direction. Further, in the massage shower apparatus 921, the size of the inlet (corresponding to the inlet 522 shown in FIG. 18) communicated with the pressure chamber on the upper side (the bus counter 924 side) of the housing body 931 is the lower pressure. The size of the inlet (corresponding to the inlet 524 shown in FIG. 18) communicated with the chamber is smaller.

  Next, the operation of this embodiment will be described. As described above, the leak inlet communicated with the upper pressure chamber of the massage shower apparatus 921 is smaller than the leak inlet communicated with the lower pressure chamber, so that it will be described in the fourth specific example of the first embodiment. According to the principle described above, the rotational speed of the water discharge housing and the foot nozzle portion 933 is relatively slow when moving upward and relatively fast when moving downward. Thus, when the user massages the foot with the water flow discharged from the foot nozzle portion 933, the foot nozzle portion 933 is slowly moved in the direction toward the heart along the veins and lymph glands, and in the opposite direction. Can return quickly and enhance the massage effect.

  In addition, in this embodiment, although the example which applies a water discharging apparatus to the massage shower apparatus for legs was shown, this invention is not limited to this. For example, a massage shower device for a leg and a massage shower device for an arm are configured using the water discharge device according to any one of the first to fifth embodiments, and the massage for the foot according to the present embodiment. You may comprise the massage apparatus for whole bodies in combination with a shower apparatus. Also in this case, in each massage shower apparatus, a higher massage effect can be obtained by making the moving speed of the shower head different between the forward path and the backward path, and slowly moving in the direction toward the user's heart.

  Moreover, the water discharging apparatus which concerns on the above-mentioned 1st thru | or 5th embodiment can also be applied to the human body washing apparatus of a flush toilet. In this case, in the water discharge to a narrow range of the human body, the movement speed of the water discharge nozzle is different between the forward path and the return path, and accordingly, the discharge water amount in the entire forward path is different from the discharge water volume in the entire return path. By doing so, it is possible to add a change to the feeling of stimulation given to the user in spite of being in a narrow range.

  Furthermore, you may use the water discharging apparatus which concerns on the above-mentioned 1st thru | or 5th embodiment for a fountain or a toy. In this case, in the reciprocating motion or rotating motion of the water discharge nozzle, the movement can be changed by making the moving speed different between the forward path and the backward path. Thereby, the viewer can be entertained visually, such as making the viewer feel a sense of rhythm.

  The embodiments of the present invention and specific examples thereof have been described above with reference to the drawings. However, the present invention is not limited to these embodiments and specific examples. That is, even if a person skilled in the art adds a design change to any of the elements constituting the water discharge device of the present invention, any element having the gist of the present invention is included in the scope of the present invention. For example, the present invention includes the gist of the present invention even if a person skilled in the art appropriately changes the outer shape of the drive unit or the water discharge nozzle of the water discharge device, the shape or arrangement of the components, or the stroke or rotation angle of the movement. As long as it is within the scope of the present invention.

It is a schematic diagram which illustrates the whole structure of the water discharging apparatus which concerns on the 1st Embodiment of this invention. It is a schematic diagram for demonstrating the mechanism of the water discharging apparatus which concerns on this embodiment. It is a schematic diagram for demonstrating the mechanism of the water discharging apparatus which concerns on this embodiment. It is a schematic diagram for demonstrating the mechanism of the water discharging apparatus which concerns on this embodiment. It is a schematic diagram for demonstrating the mechanism of the water discharging apparatus which concerns on this embodiment. It is a schematic diagram for demonstrating the effect of changing the opening degree of the inlets 32 and 34 from a neutral opening degree. It is a schematic diagram for demonstrating the mechanism which controls the inversion operation | movement of a core with a magnet. It is a perspective view of the water discharging apparatus which concerns on the 1st specific example of this embodiment. It is a perspective cutaway view of the water discharging apparatus concerning the 1st example. It is sectional drawing of the water discharging apparatus which concerns on a 1st specific example. It is the sectional view on the AA line of FIG. It is a perspective view showing a valve body. It is a schematic diagram showing the reciprocation operation | movement of the water discharging apparatus in a 1st specific example. It is a schematic diagram for demonstrating operation | movement of the control means in a 1st specific example. It is a perspective view of the water discharging apparatus which concerns on the 2nd specific example of this embodiment. It is a perspective cutaway view of the water discharging apparatus which concerns on a 2nd example. It is a longitudinal cross-sectional view of the water discharging apparatus which concerns on a 2nd specific example. It is the BB sectional view taken on the line of FIG. It is a schematic diagram showing the reciprocating operation | movement of the water discharging apparatus which concerns on a 2nd specific example. It is a perspective view of the water discharging apparatus which concerns on the 3rd specific example of this embodiment. It is a perspective cutaway view of the water discharging apparatus which concerns on a 3rd example. It is sectional drawing of the water discharging apparatus which concerns on a 3rd specific example. It is AA sectional view taken on the line of FIG. It is a perspective view showing a main valve and a slide bar. It is a schematic diagram for demonstrating operation | movement of the water discharging apparatus which concerns on a 3rd specific example. It is a schematic diagram showing the reciprocating operation | movement of the water discharging apparatus which concerns on a 3rd specific example. It is a figure which shows the difference in the moving speed by the moving direction of the core in a 3rd example, (a) shows the state which the core is moving to the right direction relatively with respect to a housing, (b) Indicates a state of moving leftward. It is a schematic diagram for demonstrating operation | movement of the control means in a 3rd specific example. It is a schematic diagram for demonstrating the contact angle of the slide bar and the inner wall of a housing main body in the 4th specific example of this embodiment. It is sectional drawing which shows the water discharging apparatus which concerns on the 2nd Embodiment of this invention, (a) shows the state which the core has moved to the right direction, (b) has moved the core to the left direction. Indicates the state. It is sectional drawing which shows the water discharging apparatus which concerns on the 3rd Embodiment of this invention, (a) shows the state which the core has moved to the right direction, (b) has moved the core to the left direction, Indicates the state. It is sectional drawing which shows the water discharging apparatus which concerns on the 4th Embodiment of this invention, (a) shows the state which the core has moved to the right direction, (b) has moved the core to the left direction, Indicates the state. It is a perspective view which shows the seal | sticker of the water discharging apparatus which concerns on the 5th Embodiment of this invention. It is a perspective view which shows the shower apparatus in the 6th Embodiment of this invention. It is a perspective view which shows the massage shower apparatus in the 7th Embodiment of this invention.

Explanation of symbols

2 Housing 10, 100, 200, 300, 401, 402, 403 Water discharger 12, 14, 112, 114, 212, 214 Water inlet 16, 18, 116, 118, 216, 218 Pressure chamber 20 Cores 24, 124, 224 Core flow path 32, 34, 132, 134, 232, 234 Inlet port 42, 44, 352, 354, 452, 454 Valve body 70, 370, 470 Magnet 74, 372, 374, 472, 474 Magnet (strong Magnetic material)
80, 180, 280 Water discharge cylinder 82, 182, 282 Water discharge channel 102, 202 Housing body 104, 203, 204 Housing lid 120, 220 Core body 122, 222 Core lid 126, 184, 226, 227, 426 Seal 142, 142a, 144, 452, 454 Main valve 143, 353 Rib 145, 355 Groove 146, 148 Slide bar 149 Connecting rod 151, 152, 154 Clearance 153 Through hole 160, 260 Leaf spring 427 Notch 502, 504, 512, 514 522, 524 Inlet 700 Water supply pipe 800 Water discharge nozzle 901 Wall 902 Water supply pipe 903 Stop cock 904 Temperature control valve 905 Branch part 906a, 906b Support part 907 Water discharge device 908 Housing body 909 Water discharge case 910 Water discharge part 911 Core 921 Masser J Shower 922 Bath 923 Water supply unit 924 Bath counter 925 Shower room 926 Shower hose 927 Shower connection unit 928 Temperature control valve 929 Switching valve 930 Spout 931 Housing main body 933 Foot nozzle unit 934 Swirling spout hole 1000 Center line 1001 Neutral line

Claims (10)

A housing having a space inside;
A core that is movable in the space while dividing the space into first and second pressure chambers, and has a core flow path inside;
A water discharge cylinder having a water discharge flow path communicating with the flow path in the core and reaching the outside of the housing;
A first water inlet for introducing a fluid into the first pressure chamber;
A second water inlet for introducing a fluid into the second pressure chamber;
A first inlet for introducing a fluid from the first pressure chamber into the core flow path;
A second inlet for introducing fluid from the second pressure chamber into the core flow path;
A valve body for changing the opening of the first and second inlets;
When the core reaches the end of the moving region on the first pressure chamber side, the pressure in the first pressure chamber is made higher than the pressure in the second pressure chamber, and the core The valve body is operated so that the pressure in the second pressure chamber is higher than the pressure in the first pressure chamber when the end of the moving region on the second pressure chamber side is reached. Control means for changing the opening of the first and second inlets;
With
An amount of the fluid that leaks from the first pressure chamber to the flow path in the core or the second pressure chamber when the valve body minimizes the opening of the first introduction port; The amount of the fluid that leaks from the second pressure chamber to the core internal flow path or the first pressure chamber when the body minimizes the opening of the second inlet. A water discharge device.   The control means, when the core reaches the end on the first pressure chamber side in the moving range, the flow resistance from the first pressure chamber to the flow path in the core, When the flow resistance from the second pressure chamber to the flow path in the core is greater and the core reaches the end on the second pressure chamber side in the moving region, the second pressure chamber 2. The water discharge device according to claim 1, wherein a flow path resistance from a pressure chamber to the core internal flow path is larger than a flow path resistance from the first pressure chamber to the core internal flow path. .   3. The water discharge device according to claim 1, further comprising a first leak inlet for introducing a fluid from the first pressure chamber into the core flow path. A first inlet for introducing a fluid from the first pressure chamber into the core flow path;
A second inlet for introducing a fluid from the second pressure chamber into the core flow path;
Further comprising
3. The water discharge device according to claim 1, wherein a size of the first leakage port is different from a size of the second leakage port. 4. The control means includes a slide bar that penetrates the valve body and is operable with a stroke longer than a moving stroke of the valve body and moves the valve body,
The size of the gap between the valve body and the slide bar on the first pressure chamber side is different from the size of the gap between the valve body and the slide bar on the second pressure chamber side. The water discharging apparatus according to claim 1 or 2, characterized in that.   A through hole that connects the first pressure chamber and the second pressure chamber to each other is formed in the core, and the inner diameter of the through hole extends from the end on the first pressure chamber side. The water discharge device according to claim 1 or 2, wherein the water discharge device continuously changes toward an end portion on the second pressure chamber side.   3. The water discharge device according to claim 1, wherein an outer shape of the core has a tapered shape in which the first pressure chamber side is small and the second pressure chamber side is large. A seal provided between the core and the housing;
The water discharge device according to claim 1 or 2, wherein the seal has a triangular notch opened to the first pressure chamber side.   The water discharge device according to any one of claims 1 to 8, wherein the space has a columnar shape, and the core reciprocates along a central axis of the column.   The water discharge device according to any one of claims 1 to 8, wherein the space has a fan shape, and the core rotates with the center of the fan as a rotation center.

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