JP2002285621A - Sanitary washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sanitary washing device which holds down manufacturing costs by making a hydraulically driven nozzle housed in a cylinder while maintaining a switching state of a switching valve, which is equipped with only one washing nozzle means, and which enables the hydraulically driven nozzle to be housed in the cylinder without requiring the switching valve. SOLUTION: A leak groove M is provided in a lower part of a watertight part formed by making a front of a piston 41 abut on a slanting surface 35 of a step part of the cylinder 31, so that internal pressure of the cylinder 31 can be released into the air from an opening 33 at an end of the cylinder 31 via the leak groove M. Consequently, the internal pressure of the cylinder 31 is immediately made weaker than urging force of a spring 43 so that the nozzle 8 can be returned from a washing position to a storage position without the need for much time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing device for washing a local part of a human body with washing water jetted from a hydraulically driven nozzle.

[0002]

2. Description of the Related Art Conventionally, for example, in a sanitary washing device 1 shown in FIG. 7, after a toilet lid 2 is opened, a user sitting on a toilet seat 3 presses a bidet washing switch or a bottom washing switch on an operation panel 4. Then, since the microcomputer of the control board 19 opens the cleaning water control valve 5 and the switching valve 6, etc., the cleaning water in the hot water tank 17 whose temperature is controlled by the hot water heater 14 and the hot water thermistor 10 is a pair of cleaning water. The ink is supplied to the nozzle device 7 (corresponding to “washing nozzle means”). Then, one of the pair of nozzles 8 advances from the storage position to the cleaning position in accordance with the bidet cleaning switch or the posterior cleaning switch of the operation panel 4, and the cleaning water flows from the ejection hole 9 provided at the tip of the nozzle 8. Is ejected, so that the human body part can be washed.

That is, as shown in FIG. 9, when the washing water control valve 5 (see FIG. 7) and the switching valve 6 (see FIG. 7) are opened when the nozzle 8 is at the storage position, the cylinder The cleaning water flows from the inlet 32 of the nozzle 31, and then reaches the periphery of the nozzle 8 through the peripheral gap 36 of the piston 41 while pressing the piston 41.
Therefore, the piston 41 is pushed out in the direction of the cleaning position while resisting the urging force of the spring 43 by a force obtained by multiplying the difference between the cross-sectional areas of the piston 41 and the nozzle 8 by the water pressure.

On the other hand, in the center of the piston 41, a nozzle 8
A central water passage 44 communicating with the jet hole 9 of
Further, a one-way valve including a valve body 45 and a spring 46 is provided in the central waterway 44. In this regard, the spring 46
Since the pressure at which the valve body 45 starts to open against the urging force of the spring 41 is set to be higher than the water pressure when the piston 41 starts to be pushed out against the urging force of the spring 43, the piston 41 protrudes from the piston 41. Before the nozzle 8 reaches the cleaning position, that is, before the piston 41 comes into contact with the step slope 35 of the cylinder 31, the cleaning water does not blow out from the discharge hole 9 of the nozzle 8. Further, in the distal end opening 33 of the cylinder 31 into which the nozzle 8 is inserted, a gap between the cylinder 31 and the nozzle 8 is
The piston 41 is reliably pushed out in the direction of the cleaning position.

Then, as shown in FIG. 10, when the nozzle 8 comes to the cleaning position, the front surface of the piston 41 comes into contact with the stepped slope 35 of the cylinder 31 to form a watertight portion. As a result, the internal pressure of the cylinder 31 increases, the valve body 45 opens against the urging force of the spring 46, and the washing water passes through the central water passage 44 of the piston 41. Cleaning water can be spouted to clean the human body.

However, in order to stop the ejection of the washing water from the ejection hole 9 of the nozzle 8, the washing water control valve 5 (see FIG. 7)
Is closed, the piston 41 and the washing water control valve 5 are closed.
(See FIG. 7) Since the washing water is confined in the piping between the nozzles 8 (see FIG. 7),
However, it cannot be returned from the cleaning position in FIG. 10 to the storage position in FIG. However, actually, since the watertight portion formed by the stepped slope 35 of the cylinder 31 and the front surface of the piston 41 being in contact with each other is not perfect, the internal pressure of the cylinder 31 decreases over time after a lapse of time, When the internal pressure of the cylinder 31 becomes smaller than the urging force of the spring 43, the nozzle 8 protruding from the piston 41 starts to return from the cleaning position in FIG. 10 to the storage position in FIG. However, this requires a lot of time for the nozzle 8 to return from the cleaning position in FIG. 10 to the storage position in FIG. 9, and is not suitable for actual use.

Therefore, in actual use, as shown in FIG. 8, the ON / OFF energization of the coil 28 of the switching valve 6 is controlled until the internal pressure of the cylinder 31 becomes smaller than the urging force of the spring 43. Thus, the valve element 25 of the switching valve 6 is moved up and down a required number of times.

More specifically, referring to FIGS. 8 to 10, for example, in FIG. 8, the valve body 25 of the switching valve 6 closes the bidet outlet 22 and opens the buttocks outlet 23. In the cleaning nozzle device 7, the assembling nozzle 8 is at the washing position in FIG. 10 and the bidet nozzle 8 is at the storage position in FIG. 9, but the washing water is ejected from the ejection holes 9 of the assembling nozzle 8. When the washing water control valve 5 is closed to stop the operation, the piping between the buttocks piston 41 and the washing water control valve 5 is connected via the buttocks outlet 23 and the water supply port 21 of the switching valve 6. Because of the closed circuit, the water pressure for maintaining the nozzle 8 protruding from the buttocks piston 41 at the washing position in FIG. 10 remains inside the cylinder 31.

Then, the valve body 25 of the switching valve 6 is moved up and down, and the internal pressure of the buttocks cylinder 31 is increased through the clearance around the valve body 25 of the switching valve 6 and the bidet outlet 22 through the bidet outlet 22. To the cylinder 31. At this time, since the bidet nozzle 8 is in the housed state shown in FIG. 9, the water pressure reaching the bidet cylinder 31 from the buttocks cylinder 31 passes through the peripheral gap 36 of the piston 41 and The end opening 33 is open to the atmosphere.

As a result, although the washing water slightly flows down from the distal end opening 33 of the bidet cylinder 31 in the state of FIG. 9, the internal pressure of the buttocks cylinder 31 is immediately smaller than the urging force of the spring 43. Therefore, the assembling nozzle 8 can be returned from the washing position in FIG. 10 to the storage position in FIG. 9 without requiring much time. still,
This is the same when returning the bidet nozzle 8 from the cleaning position in FIG. 10 to the storage position in FIG.

[0011]

However, FIG.
In order to immediately return the nozzle 8 from the washing position to the storage position shown in FIG. 9, the valve body 25 of the switching valve 6 is moved up and down until the internal pressure of the cylinder 31 becomes smaller than the urging force of the spring 43. ON-OFF for coil 28 of valve 6
The control of energization is performed.
Dedicated control circuit and switching valve 6 different from normal control circuit
It is necessary to improve the durability and the like, which is a factor of increasing the manufacturing cost.

Accordingly, the present invention has been made to solve the above-mentioned problems, and the manufacturing cost is reduced by storing a hydraulically driven nozzle in a cylinder while maintaining the switching state of the switching valve. It is a first object to provide a sanitary washing device in which the amount is reduced.

Further, in order to immediately return the nozzle 8 from the washing position of FIG. 10 to the storage position of FIG. 9, the internal pressure of the cylinder 31 is reduced until the pressure of the spring 43 becomes smaller than the urging force of the spring 43.
The on / off energization of the coil 28 of the switching valve 6 is controlled by moving the valve body 25 of the switching valve 6 up and down. In other words, if the switching valve 6 is not provided, the cleaning position of FIG. Since the nozzle 8 cannot be immediately returned to the storage position, a sanitary washing device having only one washing nozzle device 7 (corresponding to "washing nozzle means") that does not structurally require the switching valve 6 is manufactured. It was difficult to do.

The present invention has been made in order to solve the above-mentioned problems, and is a sanitary washing apparatus provided with only one washing nozzle means. A second object is to provide a driving nozzle capable of being housed in a cylinder.

[0015]

According to a first aspect of the present invention, there is provided a switching nozzle for supplying cleaning water to one of a pair of cleaning nozzles. A sanitary washing device comprising a valve, wherein each of the washing nozzle means includes a cylinder, a piston housed in the cylinder, and a nozzle protruding from the piston and inserted into a tip end opening of the cylinder. And a spring interposed between the cylinder and the piston, and when the water pressure of the washing water acts on the cylinder, the nozzle moves forward from the cylinder, whereby the piston is moved to the cylinder. When the washing water is ejected from the ejection hole at the upper end of the nozzle while contacting and becomes watertight, when the water pressure of the washing water is released from acting on the cylinder, By the biasing force of the serial spring,
The nozzle is retracted and housed in the cylinder, and when the piston comes into contact with the cylinder to form a watertight portion, a leak groove is also formed in the watertight portion. .

That is, in the sanitary washing apparatus of the present invention, when the washing water is supplied to one of the pair of washing nozzle means via the switching valve and the washing water pressure acts on the cylinder, the nozzle moves forward from the cylinder. Since the piston comes into contact with the cylinder and becomes watertight, and the washing water is ejected from the ejection hole of the nozzle, it can be said that a hydraulically driven nozzle is used. When the action is released, the water pressure of the washing water inside the cylinder is released to the atmosphere from the opening at the tip of the cylinder through the leak groove of the watertight part formed by the piston abutting on the cylinder, and the urging force of the spring At this point, the sanitary washing device of the present invention maintains the switching state of the switching valve while maintaining the switching state of the switching valve. By housing the Le in the cylinder, one can say that with reduced manufacturing cost.

Further, in the sanitary washing device of the present invention, storing the hydraulically driven nozzle in the cylinder while maintaining the switching state of the switching valve is different from that described in the section of the prior art. Since the switching state of the switching valve is not repeatedly changed in a short time, the life (reliability) of the switching valve can be improved.

According to a second aspect of the present invention, there is provided the sanitary washing device according to the first aspect, wherein the switching valve is manually operated.

That is, in the sanitary washing device of the present invention, since the hydraulically driven nozzle is housed in the cylinder while the switching state of the switching valve is maintained, complicated switching control is not required. Since there is no problem in using a manual switching valve, the use of a manual switching valve is permitted. By using a manual switching valve, a control circuit for the switching valve becomes unnecessary, and the manufacturing cost is reduced. Can be further suppressed, and power consumption can be reduced.

According to a third aspect of the present invention, there is provided a sanitary washing apparatus provided with one washing nozzle means, wherein the washing nozzle means comprises a cylinder and the cylinder. A piston provided in the cylinder, a nozzle protruding from the piston and inserted through a distal end opening of the cylinder, and a spring interposed between the cylinder and the piston, When the pressure of the washing water is applied, the nozzle advances from the cylinder, so that the piston comes into contact with the cylinder and becomes watertight, and the washing water is ejected from the ejection hole at the upper end of the nozzle. When the water pressure of the water is released from acting on the cylinder, the urging force of the spring causes the nozzle to retreat and be stored in the cylinder. , And the when the piston is watertight portion in contact with the cylinder is formed, it is characterized in that, also the leak grooves are formed on the watertight section.

That is, in the sanitary washing apparatus of the present invention, when washing water is supplied to one washing nozzle means and the water pressure of the washing water acts on the cylinder, the nozzle advances from the cylinder and the piston comes into contact with the cylinder. Since it becomes watertight and flushing water is ejected from the ejection hole of the nozzle, it can be said that a water pressure driven nozzle is used, but after that,
When the water pressure of the washing water is released from acting on the cylinder,
The water pressure of the washing water inside the cylinder is released to the atmosphere from the opening at the tip of the cylinder through the leak groove in the watertight part formed by the piston abutting on the cylinder, and the nozzle is retracted by the urging force of the spring, causing the cylinder to retract. In this regard, the sanitary washing device of the present invention is a sanitary washing device having only one washing nozzle means, and does not require a switching valve, and is hydraulically driven. It can be said that the nozzle can be housed in the cylinder.

The invention according to claim 4 is the sanitary washing device according to any one of claims 1 to 3, wherein the leak groove is formed below the watertight portion. It is characterized by.

That is, in the sanitary washing device of the present invention, even while washing water is being ejected from the ejection hole at the upper end of the nozzle, a small amount of washing water flows down from the opening at the tip of the cylinder via the leak groove. However, in this regard, if a leak groove is provided below the watertight portion formed by the piston abutting on the cylinder, the water pressure of the cleaning water inside the cylinder from the tip opening of the cylinder passes through the leak groove. When released into the atmosphere, a small amount of cleaning water flows down from the lower part of the opening at the tip of the cylinder. Water can be structurally prevented from flowing along the upper part of the nozzle into the nozzle at the upper end of the nozzle, and even if dirt is attached to the upper part of the nozzle, the dirt is injected into the nozzle at the upper part of the nozzle tip. sink Not the son-in-law. Also, it is possible to prevent the flow of the washing water ejected from the ejection hole of the nozzle from being disturbed by the washing water passing through the leak groove, thereby changing the washing feeling.

Even if a leak groove is not provided at the lower part of the watertight portion formed by the piston abutting on the cylinder, if the amount of the washing water passing through the leak groove is controlled, the washing can be performed from the ejection hole of the nozzle. It is possible to prevent a small amount of washing water that has passed through the leak groove from flowing into the ejection hole at the upper end of the nozzle along the upper portion of the nozzle while ejecting the water.

[0025]

Embodiments of the present invention will be described below with reference to the drawings. The sanitary washing device of the present embodiment is different from the sanitary washing device 1 of FIG. 7 described in the section of the prior art in that the cylinder 31 of the washing nozzle device 7 (see FIGS. 9 and 10).
8), and the switching valve 6 in FIG. 8 is replaced with a manual type. Therefore, in this section, the same components are denoted by the same reference numerals, and description thereof is omitted.
The explanation focuses on the differences.

That is, in the sanitary washing device of the present embodiment, as shown in FIGS. 1 and 2, in the cylinder 31 of the washing nozzle device 7, a leak groove is formed at a lower portion of the step slope 35 with which the front surface of the piston 41 abuts. M is formed. In this regard, the leak groove M has a shape as shown in the cross-sectional views of FIGS. 3 and 4, and is, for example, about 1 mm wide × 0.3 mm deep. Further, as shown in FIG. 5, a manual switching valve 50 is provided between the hot water tank 17 and the pair of cleaning nozzle devices 7 instead of the switching valve 6 of FIG.

Therefore, the sanitary washing device of the present embodiment will be described with reference to FIGS. 1, 2 and 5. For example, in FIG. 5, the valve body 52 of the manual switching valve 50 has a bidet outlet. 55 is closed and the outlet 54 for buttocks is opened, so that in the cleaning nozzle device 7,
2 and the bidet nozzle 8 is in the storage position shown in FIG.

The washing water control valve 5 is used to stop the ejection of washing water from the ejection holes 9 of the assembling nozzle 8.
Is closed, the assembling nozzle 8
1 is located in the washing position in FIG. 1, as shown in FIG. 1, since the front surface of the piston 41 is in contact with the stepped slope 35 of the cylinder 31, there is a leak groove M below the watertight portion. The internal pressure of the assembling cylinder 31 is determined by the leak groove M
After that, it is opened to the atmosphere from the tip end opening 33 of the buttocks cylinder 31.

As a result, although the washing water slightly flows from the tip end opening 33 of the buttocks cylinder 31 in the state of FIG. 1, the internal pressure of the buttocks cylinder 31 is immediately smaller than the urging force of the spring 43. Therefore, the assembling nozzle 8 can be returned from the cleaning position in FIG. 1 to the storage position in FIG. 2 without requiring much time.

However, if the leak groove M formed on the step slope 35 with which the front surface of the piston 41 comes into contact is too large,
It is conceivable that the flow rate of the washing water ejected from the ejection hole 9 of the assembling nozzle 8 is reduced. The leak groove is 1mm wide x
Since a depth of about 0.3 mm is sufficient, it is possible to minimize a decrease in the flow rate of the washing water ejected from the ejection hole 9 of the buttocks nozzle 8. The same applies to the case where the bidet nozzle 8 is returned from the cleaning position in FIG. 1 to the storage position in FIG.

In the manual switching valve 50 shown in FIG.
Reference numeral 53 denotes a water supply port, and reference numeral 56 denotes a flow path of the valve element 52.

As described above in detail, in the sanitary washing device of the present embodiment, as shown in FIG. 5, washing water is supplied to one of the pair of washing nozzle devices 7 through the switching valve 50. When the water pressure of the washing water acts on the cylinder 31 (see FIGS. 1 and 2), the nozzle 8 advances from the cylinder 31 and the piston 41 comes into contact with the step slope 35 of the cylinder 31 as shown in FIG. It becomes watertight, and the ejection hole 9 of the nozzle 8
Since the washing water is spouted from the nozzle, the nozzle 8 of the hydraulic drive type
You can say that you are using. Thereafter, when the washing water control valve 5 (see FIG. 5) is closed and the water pressure of the washing water is released from acting on the cylinder 31, the piston 41 is formed in contact with the step slope 35 of the cylinder 31. The water pressure of the cleaning water inside the cylinder 31 is released to the atmosphere from the distal end opening 33 of the cylinder 31 through the leak groove M in the watertight portion, and as shown in FIG. It is retracted and stored in the cylinder 31. In this regard, the sanitary washing device according to the present embodiment can store the hydraulically driven nozzle 8 in the cylinder 31 while maintaining the switching state of the switching valve 50 (see FIG. 5). Unlike the one described in the column, a dedicated control circuit different from a normal control circuit is not required, so that it can be said that the manufacturing cost is reduced.

Further, in the sanitary washing apparatus of the present embodiment, the hydraulically driven nozzle 8 is housed in the cylinder 31 while the switching state of the switching valve 50 (see FIG. 5) is maintained. Unlike the case described in the column, the switching state of the switching valve 50 (see FIG. 5) is not repeatedly changed in a short time, so that the life (reliability) of the switching valve 50 (see FIG. 5) is increased. Can be improved.

Further, in the sanitary washing device of the present embodiment, a manual switching valve 50 (see FIG. 5) is used. Since the control circuit for the valve is not required, the production cost can be further reduced, and power consumption can be reduced.

Further, in the sanitary washing device of the present embodiment, even while washing water is being ejected from the ejection hole 9 at the upper end of the nozzle 8, a small amount of washing water is supplied to the cylinder 31 through the leak groove M. It will flow down from the tip opening 33. In this regard, as shown in FIG. 1, a leak groove M is provided in a lower portion of a watertight portion formed by the piston 41 abutting on the step slope 35 of the cylinder 31. The pressure of the cleaning water inside the cylinder 31
When a small amount of washing water flows down from the lower part of the tip opening 33 of the cylinder 31 when the washing water is released to the atmosphere from the tip opening 33 of the nozzle, the washing water is ejected from the ejection hole 9 of the nozzle 8. In addition, it is possible to structurally prevent a small amount of cleaning water that has passed through the leak groove M from flowing along the upper portion of the nozzle 8 into the ejection hole 9 at the upper end of the nozzle 8. Therefore, even if dirt adheres to the upper part of the nozzle 8, the dirt does not flow into the ejection hole 9 at the upper end of the nozzle 8. Also,
It is also possible to prevent the flow of the washing water ejected from the ejection hole 9 of the nozzle 8 from being disturbed by the washing water passing through the leak groove M and changing the washing feeling.

Further, in the sanitary washing device of the present embodiment, as shown in FIGS. 1 and 2, a groove serving as a leak groove M is provided on the stepped slope 35 of the cylinder 31.
Compared to the case where the groove serving as the leak groove M is provided in the piston 41, there is an advantage that the position of the leak groove M in the watertight portion formed by abutting the piston 41 on the stepped slope 35 of the cylinder 31 is always stable. is there.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention. For example, in the sanitary washing device of the present embodiment, as shown in FIG.
Although a leak groove M is provided in a lower portion of a watertight portion formed in contact with the first step slope 35, the piston 41 is
Even if the leak groove M is not provided in the lower part of the watertight portion formed in contact with the first step slope 35, if the supply amount of the wash water is controlled by the wash water control valve 5 (see FIG. 5) or the like. While the washing water is being ejected from the ejection hole 9 of the nozzle 8, it is assumed that a small amount of the washing water that has passed through the leak groove M flows along the upper portion of the nozzle 8 into the ejection hole 9 at the upper end of the nozzle 8. Can be prevented. Alternatively, the size of the leak groove M is strictly controlled, and the amount of cleaning water from the leak groove M is suppressed,
A similar effect can be obtained by suppressing the force of the washing water, so that the leak groove M can be formed in the piston 41.

Further, in the sanitary washing device of the present embodiment,
As shown in FIG. 5, the cleaning water is supplied to one of the pair of cleaning nozzle devices 7 via the switching valve 50. However, as shown in FIG. 6, the switching valve 50 of FIG. In addition, the cleaning water control valve 5 may be used to supply the cleaning water to one cleaning nozzle device 7.

In the sanitary washing apparatus having the water channel shown in FIG. 6, when one washing nozzle device 7 is supplied with washing water, and when the pressure of the washing water acts on the cylinder 31 (see FIGS. 1 and 2), FIG. The nozzle 8 advances from the cylinder 31 as shown in FIG.
The nozzle 8 becomes watertight and jets the washing water from the jet hole 9 of the nozzle 8, so that it can be said that the nozzle 8 of the hydraulic drive type is used. Thereafter, when the washing water control valve 5 (see FIG. 6) is closed and the water pressure of the washing water is released from acting on the cylinder 31, the piston 41 is formed in contact with the stepped slope 35 of the cylinder 31. The water pressure of the washing water inside the cylinder 31 is released from the tip opening 33 of the cylinder 31 to the atmosphere through the leak groove M in the watertight portion,
As shown in FIG. 2, the nozzle 8 is retracted and housed in the cylinder 31 by the urging force of the spring 43. In this regard, the sanitary washing device having the water channel of FIG. 6 is a sanitary washing device provided with only one washing nozzle device 7, and does not require the switching valve 50 of FIG. 8 can be stored in the cylinder 31.

[0040]

According to the sanitary washing apparatus of the present invention, the washing water is supplied to one of the pair of washing nozzle means via the switching valve, and when the washing water pressure acts on the cylinder, the nozzle moves forward from the cylinder. Since the piston comes into contact with the cylinder and becomes watertight, and the washing water is ejected from the ejection hole of the nozzle, it can be said that a hydraulically driven nozzle is used. When the action is released, the water pressure of the washing water inside the cylinder is released to the atmosphere from the opening at the tip of the cylinder through the leak groove of the watertight part formed by the piston abutting on the cylinder, and the urging force of the spring At this point, the sanitary washing device of the present invention switches the hydraulically driven nozzle while maintaining the switching state of the switching valve since the nozzle is retracted and stored in the cylinder. By housed in Sunda, one can say that with reduced manufacturing cost.

Further, in the sanitary washing apparatus of the present invention, storing the hydraulically driven nozzle in the cylinder while maintaining the switching state of the switching valve is different from that described in the section of the prior art. Since the switching state of the switching valve is not repeatedly changed in a short time, the life (reliability) of the switching valve can be improved.

Further, in the sanitary washing device of the present invention, storing the hydraulically driven nozzle in the cylinder while maintaining the switching state of the switching valve is not problematic even if the switching valve is manually operated. Since the use of a switching valve of a manual type is permitted, the use of a switching valve of a manual type allows
Since the control circuit for the switching valve is not required, the manufacturing cost can be further reduced, and the power consumption can be reduced.

Further, in the sanitary washing device of the present invention, when washing water is supplied to one washing nozzle means and the pressure of the washing water acts on the cylinder, the nozzle advances from the cylinder,
Since the piston comes into contact with the cylinder and becomes watertight, and flushing water is blown out from the nozzle orifice, it can be said that a hydraulically driven nozzle is used, but then the water pressure of the flushing water acts on the cylinder. When the piston is released, the water pressure of the cleaning water inside the cylinder is released to the atmosphere from the tip opening of the cylinder through the leak groove of the water-tight part formed by the piston abutting on the cylinder, and the urging force of the spring causes In this respect, the sanitary washing device of the present invention is a sanitary washing device having only one washing nozzle means and requires a switching valve since the nozzle is retracted and housed in the cylinder. Instead, it can be said that the hydraulically driven nozzle can be housed in the cylinder.

In the sanitary washing device of the present invention,
Even while washing water is being ejected from the ejection hole at the upper end of the nozzle, a small amount of washing water flows down from the opening at the tip of the cylinder through the leak groove, but at this point, the piston comes into contact with the cylinder. If a leak groove is provided in the lower part of the watertight portion formed by the above, when the pressure of the washing water inside the cylinder is released to the atmosphere from the opening at the tip of the cylinder through the leak groove, a small amount of the washing water Because the water flows down from the lower part of the tip opening of the nozzle, a small amount of cleaning water that has passed through the leak groove is ejected along the upper part of the nozzle while the cleaning water is being spouted from the nozzle orifice. It can be structurally prevented from flowing into the hole, and even if dirt adheres to the upper part of the nozzle, the dirt does not flow into the ejection hole at the upper end of the nozzle. Further, it is possible to prevent the flow of the washing water ejected from the ejection hole of the nozzle from being disturbed by the washing water passing through the leak groove and changing the washing feeling.

[Brief description of the drawings]

FIG. 1 is a sectional view of a cleaning nozzle device in a state where a nozzle is at a cleaning position in a sanitary cleaning device of the present invention.

FIG. 2 is a cross-sectional view of the cleaning nozzle device in a state where the nozzle is at a storage position in the sanitary cleaning device of the present invention.

FIG. 3 is a cross-sectional view of a leak groove of the sanitary washing device of the present invention, taken along a line AA in FIG. 4;

FIG. 4 is a sectional view of a leak groove of the sanitary washing device of the present invention.

FIG. 5 is a waterway diagram of the sanitary washing device of the present invention.

FIG. 6 is a waterway diagram of the sanitary washing device of the present invention.

FIG. 7 is a perspective view of the sanitary washing device of the present invention and the prior art.

FIG. 8 is a waterway diagram of a conventional sanitary washing device.

FIG. 9 is a cross-sectional view of the cleaning nozzle device in a state in which the nozzle is in a storage position in the conventional sanitary cleaning device.

FIG. 10 is a cross-sectional view of a cleaning nozzle device in a state in which a nozzle is at a cleaning position in a sanitary cleaning device according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sanitary washing device 7 Washing nozzle device 8 Nozzle 9 Nozzle ejection opening 31 Cylinder 33 Cylinder tip opening 41 Piston 43 Spring 50 Manual switching valve M Leak groove

Claims (4)

[Claims] 1. A sanitary washing apparatus comprising: a pair of washing nozzle means; and a switching valve for supplying washing water to one of the washing nozzle means, wherein each of the washing nozzle means comprises: a cylinder; A cylinder provided with a piston, a nozzle protruding from the piston and inserted through a distal end opening of the cylinder, and a spring interposed between the cylinder and the piston; When the water pressure of the washing water acts on the nozzle, the nozzle moves forward from the cylinder, so that the piston comes into contact with the cylinder and becomes watertight, and the washing water is ejected from an ejection hole at the upper end of the nozzle. When the pressure of the washing water is released from acting on the cylinder, the urging force of the spring retracts the nozzle and retracts the nozzle into the cylinder. It shall be and, when said piston is watertight portion in contact with the cylinder is formed, the sanitary washing device, characterized in that, also the leak grooves are formed on the watertight section. 2. The sanitary washing device according to claim 1, wherein the switching valve is manually operated. 3. A sanitary washing device comprising one washing nozzle means, wherein the washing nozzle means comprises a cylinder, a piston provided in the cylinder, and a tip opening of the cylinder protruding from the piston. And a spring interposed between the cylinder and the piston, and when the water pressure of the washing water acts on the cylinder, the nozzle moves forward from the cylinder, When the piston comes into contact with the cylinder and becomes water-tight, and ejects the washing water from the ejection hole at the upper end of the nozzle, while the water pressure of the washing water is released from acting on the cylinder, the urging force of the spring causes The nozzle is retracted and housed in the cylinder, and the piston contacts the cylinder to form a watertight portion. Wherein a leak groove is also formed in the watertight part when the cleaning is performed. 4. The sanitary washing device according to claim 1, wherein the leak groove is formed below the watertight portion.