JP2002336741A - Fluid ejecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a driving part such as a pump for supplying fluid to a chamber and to reduce operation costs by adopting a structure in which a nozzle is rotated by the pressure of the fluid. SOLUTION: A cleaning water ejection apparatus 40 has an upper side through hole 6A formed in the shape of an edge in the ceiling of the chamber 2 and a recessed part 43 in the shape of a bottomed round hole in the bottom surface. In the nozzle 4, a contraction part 7 on the tip side of the nozzle is inserted into the through hole 6A, and a lower end part 44 is inserted into the recessed part 43 to be incorporated. The nozzle 4, in the through hole 6A, makes a cleaning water ejection port 5 face the outside of the through hole 6A, and the position of the nozzle 4 is allowed to change freely rotatably and in the nozzle axis O direction. The nozzle 4 can rotate around the central axis in a posture inclined to the central axis P of the through hole 6A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid ejection device having a chamber for receiving a fluid and ejecting the received fluid from a fluid ejection port.

[0002]

2. Description of the Related Art As an example of this type of fluid ejection device, a local cleaning device for cleaning a local part (anus or the like) of a human body is well known. In such a local cleaning device, when the cleaning water is jetted from one fluid jet port toward a human body part, it is generally desired that the range where the jetted cleaning water reaches a certain wide range.

In order to satisfy such demands, a method of rotating a nozzle arm with a built-in nozzle along an arc trajectory (a nozzle arm rotating method) or a method of driving the nozzle itself in a nozzle arm with the nozzle incorporated therein (a nozzle rotating method) ). By the way, in the former method, since it is necessary to simultaneously control the nozzle arm on two axes on the orthogonal coordinates, a drive motor or the like is required for each axis, and the apparatus is enlarged. On the other hand, the latter method is preferable because the device to be driven is only the nozzle, so that the apparatus can be downsized by that much. Various methods of rotating the nozzle have been proposed in, for example, Japanese Patent Application Laid-Open No. 2000-8453, and are broadly classified into a method in which the nozzle is driven by an electric force and a method in which the nozzle is driven by a cleaning water pressure. The latter is superior to the former in terms of energy saving.

FIG. 1 is an explanatory view for explaining a configuration which has been conventionally adopted so that a nozzle is driven to rotate at a cleaning water pressure.
FIG. 1A shows a schematic cross section of the nozzle arm, and FIG.
(B) is an explanatory view showing a schematic cross section taken along the line AA.

As shown in FIG. 1, a frustoconical nozzle is rotatably incorporated in a chamber of a nozzle arm.
A plurality of curved grooves are formed around the peripheral wall of the nozzle. This nozzle is sealed at its tip end with the inner surface of the chamber by a sealing material. When the cleaning water is supplied to such a nozzle, the nozzle is rotated by the pressure of the cleaning water when the cleaning water passes through the inner surface of the chamber and the groove on the peripheral wall of the nozzle. Therefore, the nozzle spouts the washing water from the spout at the tip of the nozzle so as to widen the landing area.

[0006]

However, in the above-mentioned conventional construction, since the seal member is interposed between the tip of the nozzle and the inner surface of the chamber, the nozzle receives a relatively large rotational resistance from the seal member during its rotation. .

[0007] The rotation speed of the nozzle affects the spread of the washing water from the ejection port, and a certain rotation speed is required to widen and narrow the landing area. As a result, in order to develop and maintain the rotation of the nozzle, it is necessary to increase the water pressure at the time of supplying the washing water, which causes problems such as an increase in the size of a driving unit such as a pump and an increase in operating costs. there were.

[0008] These problems are not peculiar to the washing water jetting device represented by the local washing device, and the same applies to the fluid jetting device used for other purposes because of the structure in which the nozzle rotation is caused by the fluid pressure. The problem has arisen.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has adopted a structure in which a nozzle is rotated by a fluid pressure, and further downsizes a driving unit such as a fluid supply pump to a chamber and reduces operating costs. The purpose is to plan.

[0010]

SUMMARY OF THE INVENTION In order to solve at least a part of the above problems, a fluid ejection device according to the present invention includes a chamber for receiving a fluid, and ejects the received fluid from a fluid ejection port. A fluid ejecting device, wherein the nozzle is incorporated in the chamber, has the fluid ejection port on the nozzle tip side, and has a nozzle internal conduit for guiding the fluid received in the chamber to the fluid ejection port. The nozzle is provided, and the reduced diameter portion on the nozzle tip side formed in the nozzle is rotatably provided in the opening formed in the chamber, and the nozzle is allowed to change its position in the axial direction of the nozzle. While entering, the direction of the fluid ejection port is set to a direction inclined with respect to the axis, and when the fluid is supplied to the chamber,
The position of the nozzle is changed toward the outer side of the nozzle tip by the fluid pressure, and the end surface of the nozzle portion having a larger diameter than the reduced diameter portion contacts the chamber ceiling wall on the opening side, and the contact state. It is characterized in that the nozzle is configured to eject fluid from the fluid ejection port while rotating around the axis by fluid pressure.

In the fluid ejection device of the present invention having the above-described structure, when the fluid is supplied to the chamber, the position of the nozzle is changed toward the outside of the tip of the nozzle by the fluid pressure.
An end surface of the nozzle portion having a larger diameter than the reduced diameter portion on the nozzle tip side is in contact with the chamber ceiling wall on the opening side.

A nozzle in such an abutting state ejects fluid from a fluid ejection port while rotating around the axis of the nozzle by fluid pressure. Since the direction of the fluid ejection port is inclined with respect to the nozzle axis, the fluid is ejected in a direction inclined with respect to the nozzle axis, and is ejected in a conical shape with this inclination.

[0013] Thus, the fluid can be ejected over a wide range. Also, with the contact above, the chamber ceiling wall,
It is possible to seal the gap between the end portion of the nozzle portion having a larger diameter than the reduced diameter portion.

In such a sealing state, although there is a small amount of room for fluid to enter between the chamber ceiling wall and the end face of the nozzle portion, this infiltrating fluid serves as a lubricant. For this reason, the resistance of the end face of the nozzle from the ceiling wall of the chamber can be reduced, so that good nozzle rotation can be achieved even when the fluid pressure in the chamber is low. That is, since the fluid pressure of the fluid to be supplied to the chamber can be reduced, the size of the drive unit such as the fluid supply pump can be reduced, and the operating cost can be reduced accordingly.

There are also the following advantages. In the nozzle arm rotating method in which the nozzle is fixed and the nozzle arm is rotated in an arc trajectory, the movement of the fluid ejection port is slow because the object to be driven is large. Further, even with the conventional nozzle rotation method shown in FIG. 1, when the fluid pressure of the supply fluid is low, the nozzle rotation, and consequently the fluid outlet rotation speed, becomes slow. Therefore, in such a case, there is a problem that the degree of spread of the fluid ejected from the rotating fluid ejection port is reduced. However, in the fluid ejection device of the present invention, even when the fluid pressure of the supply fluid is low, the rotation of the nozzle / fluid ejection port can be maintained at a high speed without greatly reducing the speed, so that the above problem does not occur.

In the above-described fluid ejection device of the present invention, a blade that receives fluid pressure may be provided around the nozzle. In this way, the nozzle can be rotated efficiently, so that it is possible to cope with low fluid pressure,
It is possible to further reduce the size of the drive unit and reduce the operating cost.

According to another aspect of the present invention, there is provided a fluid ejecting apparatus that includes a chamber for receiving a fluid and ejects the received fluid from a fluid ejection port. A nozzle incorporated in a chamber, the nozzle having the fluid ejection port on the nozzle tip side, and having a nozzle internal conduit for guiding a fluid received in the chamber to the fluid ejection port, the nozzle being formed in the chamber. The reduced diameter portion on the nozzle tip side formed in the nozzle is rotatably inserted into a state where the position of the nozzle can be changed in the axial direction of the nozzle, and the nozzle is opened. Is configured to be able to revolve around the central axis in a posture inclined with respect to the central axis of the nozzle, and when the fluid is supplied to the chamber, the nozzle is actuated by fluid pressure. The position of the nozzle is changed toward the outer side of the tip of the nozzle, and the end surface of the nozzle portion having a larger diameter than the reduced diameter portion abuts on the chamber ceiling wall on the opening side. It is characterized in that a fluid is ejected from the fluid ejection port while rotating around the axis and revolving around the center axis in a posture inclined with respect to the center axis.

In another fluid ejection device of the present invention having the above structure, when the fluid is supplied to the chamber, the position of the nozzle is changed toward the outside of the nozzle tip by the fluid pressure, and the nozzle tip is shrunk. An end face of the nozzle portion having a diameter larger than the diameter portion is in contact with the chamber ceiling wall on the opening side.

The nozzle in such an abutting state is rotated around the nozzle axis by the fluid pressure, and revolves around the central axis in a posture inclined with respect to the central axis of the opening, while the fluid ejection port Ejects fluid from

Thus, the fluid is ejected from the ejection port in a conical shape centered on the central axis of the opening of the chamber, and the fluid can be ejected in a wide range. In addition, the contact makes it possible to seal between the chamber ceiling wall and the end face of the nozzle portion having a larger diameter than the reduced diameter portion.

Since the other fluid ejection device of the present invention adopts the above-described sealing condition, there is room for fluid to enter between the ceiling wall of the chamber and the end surface of the nozzle portion, and a lubricating function is provided by the intruding fluid. Fulfill. For this reason, the resistance of the end face of the nozzle from the ceiling wall of the chamber can be reduced, so that good nozzle rotation can be achieved even when the fluid pressure in the chamber is low. Therefore, as described above, it is possible to reduce the size of the driving unit such as the pump for supplying fluid and to reduce the operating cost.

Further, even if the fluid pressure of the supply fluid is low, the rotation of the nozzle / fluid outlet can be maintained at a high speed, so that the above-mentioned problem of narrowing the spread of the ejected fluid does not occur.

In the above-described another fluid ejection device of the present invention,
A guide for guiding the nozzle body may be provided in the chamber so that the nozzle revolves around the central axis in a posture inclined with respect to the central axis of the opening. With this arrangement, the nozzle is stabilized by the nozzle guide when the nozzle orbits around the central axis of the opening. Further, by variously adjusting the guide, it becomes easy to set the nozzle inclination posture to a desired posture.
As a result, the fluid can be ejected in a stable conical shape around the opening central axis of the chamber, and the ejected fluid can be ejected accurately to a desired range of the ejection target.

Further, in any of the above-described fluid ejection devices of the present invention, at least one of the chamber ceiling wall and the end face of the nozzle portion having a diameter larger than the reduced diameter portion can be formed into a spherical surface. This makes it possible to further reduce the rotation resistance that the rotating and revolving nozzle receives from the chamber ceiling wall. Therefore, since the rotation efficiency of the nozzle is increased and it is possible to cope with a low fluid pressure, it is possible to further reduce the size of the driving unit and reduce the operating cost.

According to another aspect of the present invention, there is provided a fluid ejecting apparatus for ejecting a fluid from a fluid ejection port, comprising: a chamber for receiving a fluid supply; A nozzle incorporated in the chamber, the nozzle having the fluid ejection port on the nozzle tip side, and a nozzle having a nozzle internal conduit for guiding the fluid received in the chamber to the fluid ejection port, the nozzle comprising: The fluid outlet is exposed to the outside of a ceiling opening formed in the chamber, and abuts on one portion of the chamber ceiling wall on the side of the ceiling opening and at least one other portion to cause the ceiling. It takes a posture inclined with respect to the central axis of the opening, and is incorporated in the chamber so as to revolve around the central axis in the inclined posture. While revolving around the central axis in a state of adopting the inclined posture by the fluid pressure of the feed fluid, characterized by ejecting fluid from the fluid ejection opening through said nozzle conduit.

In another fluid ejecting apparatus of the present invention having the above structure, when the fluid is supplied to the chamber, the nozzle takes an inclined posture inclined with respect to the center axis of the ceiling opening by the fluid pressure of the supplied fluid. The fluid is ejected from the fluid ejection port while revolving around the central axis in a state where the fluid is ejected. Therefore, the fluid ejected from the fluid ejection port of the nozzle has a conical shape centered on the central axis of the opening of the chamber, and the fluid can be ejected over a wide range.

Such an inclined posture of the nozzle is brought about by the contact of the nozzle with the ceiling wall of the chamber and the contact of the nozzle with another point, and the two contacts are so-called point contacts. Therefore, at one moment while the nozzle is making the above-described revolution, at the ceiling opening of the chamber, the nozzle is in contact with the chamber ceiling wall (point contact) on the inclined side, but the area around the ceiling opening is Then, a gap is formed at a place other than the contact portion. Note that the degree of the gap is determined by the degree of inclination of the nozzle.

In such a gap around the ceiling opening, the passage of fluid in the chamber occurs, and the position of the gap changes around the ceiling opening as the nozzle revolves in an inclined posture. Therefore, the fluid passing through the gap functions as a lubricant throughout the revolution of the nozzle. Therefore, the resistance of the nozzle received from the ceiling wall of the chamber can be reduced, so that good nozzle rotation can be achieved even when the fluid pressure in the chamber is low. Therefore, as described above, it is possible to reduce the size of the driving unit such as the pump for supplying fluid and to reduce the operating cost. In addition, point contact occurs at the time of the nozzle revolution, and the point contact portion changes with the nozzle revolution. As a result, the resistance itself due to the contact is reduced, so that it is possible to further reduce the size of the driving unit and reduce the operating cost. In addition, because of the point contact, the frictional force associated with this contact can be reduced, which is preferable from the viewpoint of preventing abrasion.

Further, even when the fluid pressure of the supply fluid is low, the rotation of the nozzle / fluid ejection port can be maintained at a high revolution, so that the above-described problem of narrowing the spread of the ejected fluid does not occur.

Further, since the inclined posture of the nozzle is due to the contact with the chamber ceiling wall and the contact with another location, the inclined posture is stable in the state where the contact is made. When the fluid supply to the chamber is at a high fluid pressure, the nozzle tends to incline more, but the above-mentioned contact maintains the inclined posture at that time. Therefore, the fluid can be ejected in a stable conical shape around the center axis of the ceiling opening of the chamber, and the ejected fluid can be ejected accurately to a desired range of the ejection target. In addition, the nozzle inclination posture can be set to a desired posture by variously adjusting the contact position with the other one of the above-described positions.

As described above, when the nozzle revolves in the chamber, the rotation resistance is reduced by the fluid passing through the gap at the contact point of the chamber ceiling wall as described above. But,
The rotational resistance acts as frictional resistance on the nozzle since the nozzle is free in the chamber.
For this reason, at the time of nozzle revolution, the nozzle rotates around its own nozzle center axis, that is, rotates on its own due to the frictional resistance. When the nozzle rotates in this way, the contact position of the nozzle with respect to the chamber ceiling wall changes around the rotation axis due to the nozzle rotation, and a situation where a fixed portion remains in contact with the chamber ceiling wall does not occur. Therefore, the wear of the nozzle can be reliably suppressed.

The above-described still another fluid jetting device of the present invention can employ various aspects. For example, another contact that causes the nozzle to be inclined is brought into contact with the chamber side wall around the nozzle and caused to occur, and the chamber side wall contact point and the chamber ceiling wall come into contact at two points. It is also possible to adopt the inclined posture.

With this arrangement, since the contact point of the nozzle is separated from the chamber ceiling wall and the chamber side wall, the stabilization of the inclined posture can be improved. Further, since the contact portions are separated in this manner, even if the ceiling opening of the chamber is made small, the expression and reproducibility of the nozzle inclined posture are not affected.
Moreover, if the ceiling opening has a small diameter, the gap around the ceiling opening is also reduced, so that the amount of fluid passing through the gap can be reduced while maintaining the lubrication function of the fluid passing through the gap.

In this case, the following can be performed. That is, the nozzle has a nozzle tip having a smaller diameter than the ceiling opening, a nozzle body having a larger diameter than the ceiling opening and continuing to the nozzle tip, and protruding the nozzle tip from the ceiling opening to the outside. The fluid ejection port faces the outside of the ceiling opening, the tip end of the nozzle and a stepped portion of the nozzle body are brought into contact with the chamber ceiling wall, and the nozzle body is brought into contact with the chamber side wall to set the inclined posture. take.

[0035] In this case, the above-described conical fluid ejection port for ejecting the fluid ejection is located outside the ceiling opening, and the tip of the nozzle is located at the ceiling opening. Therefore, the fluid passing through the gap around the ceiling opening does not interfere with the fluid ejected from the fluid ejection port. For this reason, since the turbulence does not occur in the conical ejection fluid, the fluid ejection from the fluid ejection port can be stabilized.

The following can also be performed. That is, the nozzle has a nozzle tip having a smaller diameter than the ceiling opening, a nozzle body having a larger diameter than the ceiling opening and continuing to the nozzle tip, and protruding the nozzle tip from the ceiling opening to the outside. The fluid ejection port faces the outside of the ceiling opening, and the another contact is caused to come into contact with the opening wall of the ceiling opening, and the contact point of the ceiling opening wall and the contact wall of the chamber ceiling wall are raised. The inclined posture is taken at two contact points, the tip of the nozzle is brought into contact with the ceiling opening wall, and the step between the nozzle tip and the nozzle body is brought into contact with the ceiling wall of the chamber.

With this arrangement, by locating the fluid ejection port outside the ceiling opening, the above-described effects can be obtained, and the following advantages can be obtained. The nozzle is inclined when the ceiling opening wall abuts and the chamber ceiling wall abuts, and both abutting portions are located across the ceiling opening. For this reason, by adjusting the diameter of the ceiling opening, the nozzle contact position can be adjusted by separating or bringing the two contact portions apart. Since the ceiling opening can be easily post-processed from the outside of the chamber, adjustment of the nozzle inclination posture is easy.

Even in this case, since the ceiling opening of the chamber can be reduced in diameter, the gap around the ceiling opening is reduced. Therefore, the amount of fluid passing through the gap can be reduced while ensuring the lubrication function.

Further, since the ceiling opening wall comes into contact with the tip of the small-diameter nozzle, the peripheral speed of the nozzle rotation can be reduced by the small diameter of the contact portion. For this reason, even if the same portion is brought into contact due to imperfect rotation of the nozzle, the peripheral speed is low, so that the wear at the contact portion can be suppressed. In this case, due to the lubrication effect of the fluid passing through the gap around the ceiling opening, abrasion of the contact portion can be further suppressed.

In this case, the following can also be performed. That is, the nozzle adopts the inclined posture by bringing the nozzle body into contact with the chamber side wall in addition to the contact with the ceiling opening wall and the chamber ceiling wall.

In this case, since the inclination posture of the nozzle is based on the contact at three places, the inclination posture can be more stably secured. In addition, since the number of contact points when adopting the inclined posture increases, even when the fluid supply to the chamber is at a high fluid pressure, the nozzle inclined posture is more reliably maintained, and the stable conical fluid is maintained. Ejection and accurate fluid ejection to a desired range can be achieved.

Further, the nozzle moves to the ceiling opening side under the fluid pressure accompanying the fluid supply to the chamber,
A contact with the chamber ceiling wall may be caused. In this way, the nozzle can be made almost completely free in the chamber at the beginning of fluid supply before contact with the ceiling wall of the chamber. Therefore, the operability of the fluid pressure associated with the subsequent fluid supply is enhanced, and the nozzle can be easily tilted and revolved as described above. For this reason, it is possible to enhance the startability of the revolution in the inclined posture.

Further, the chamber ceiling wall may be formed so as to protrude in an annular shape at the contact point with the nozzle. In this case, since the nozzle abutment occurs only at the annular protuberance, the point contact accompanying the abutment occurs. It is useful for stabilization and prevention of wear described above. In addition, as long as the wear portion stops at the annular ridge, the point contact situation is still stable due to the annular ridge in the shape after the wear.

Further, the nozzle may be configured such that a contact portion with the chamber ceiling wall has one of a spherical shape and a tapered shape. This way,
It is more beneficial to stabilize point contact due to contact and to prevent the above-described wear. In particular, when the nozzle is inclined, the gap around the ceiling opening can be narrowed, so that the washing water passing through the gap can be reduced. Therefore, the washing water can be effectively used for jetting from the washing water jet port.

Further, if the inner pipe of the nozzle penetrates in the axial direction of the nozzle, the weight of the nozzle can be reduced by the amount of the inner pipe of the nozzle. Therefore, the inertia exhibited by the nozzle itself is reduced, and the nozzle can be easily inclined and revolved due to the fluid pressure, and the startability and the number of revolutions can be increased.

In this case, the inside pipe of the nozzle can be a large-diameter pipe on the side opposite to the fluid ejection port, so that the nozzle becomes lighter, which is useful for improving the startability and the rotation speed. In addition, when the fluid passes through the pipe in the nozzle toward the fluid ejection port, a narrow transition of the pipe occurs, so that the rectifying action of the fluid ejection cleaning water can be achieved.

Further, at least one of the chamber ceiling wall and the contact portion of the nozzle with the chamber ceiling wall may be formed of a material having wear resistance, for example, a metal material. By doing so, it is possible to suppress wear caused by nozzle contact (point contact) and to improve the heat radiation efficiency of wear heat generated at the time of contact. Therefore, fusion and fixation due to frictional heat can be avoided, and the reliability of the nozzle revolution and, consequently, the fluid ejection can be improved. If the nozzle is made of a metal material as described above, the weight of the nozzle can be increased accordingly. For this reason, the inertia exhibited by the nozzle is increased, and the centrifugal force accompanying the nozzle revolution can be increased, and the nozzle inclination attitude during the revolution can be stabilized.

The above-described fluid ejection device can be applied to various devices that discharge cleaning water to clean an object to be cleaned. For example, the present invention can be applied to a portable human body local cleaning device that carries a human body local portion, in addition to a human body local cleaning device and a shower device. In the fluid ejection device described above, when the nozzle revolves in the inclined posture, not only the actuator but also a power supply for driving the actuator and the battery are not required. Therefore, the fluid jetting device of the present invention is suitable for a portable human body local cleaning device that is required to be lightweight, compact, and low in cost.

In the human body cleaning device to which the fluid ejection device of the present invention is applied, the drive unit is reduced in size and the operating cost is reduced as described above with the fluid ejection device incorporated in the nozzle arm itself. Even if the cleaning device is bet, the nozzle arm itself and the device itself can be reduced in size.

In particular, since the spraying water landing location can be changed at a high speed through the high-speed rotation (revolution) of the nozzle, even if a location sensitive to stimuli such as a human body part is to be washed, the landing location is not affected. Can be hardly perceived, and it is possible to prevent the cleaning from giving an uncomfortable feeling.

The shower device to which the fluid ejection device of the present invention is applied is also suitable as a shower device since the drive unit provided by the fluid ejection device can be reduced in size and the operating cost can be reduced. In addition, since no special device or power supply is required as described above, the device is also suitable for an environment where humidity is high and rust or electric leakage easily occurs, for example, a shower device in a bathroom. Furthermore, there is no sense of incongruity when taking a shower fountain due to the high-speed transition of the landing location of the spouting wash water.

In a washing apparatus to which the fluid ejection apparatus of the present invention is applied, for example, a dishwashing apparatus using tableware as an object to be washed, the nozzle of the fluid ejection apparatus is directed toward the article to be washed, and The conical squirt washing water accompanying the nozzle revolution is bathed. Such jetted cleaning water has a swirl component due to the revolution of the nozzle, and as described above, when the nozzle itself rotates around the nozzle axis, it also has a swirl component due to the revolution. Therefore, according to the cleaning device of the present invention, the ability to remove dirt adhered to a substance to be adhered is increased as compared with a case where the cleaning water simply lands directly on the object to be cleaned, and the cleaning ability can be improved. it can. And such a widespread washing water squirt,
Improvement of peeling / cleaning ability increases water saving.

In such a washing apparatus (dishwashing apparatus), the above-described fluid ejection device is mounted on a rotatable rotating arm provided in the washing chamber. At the time of this mounting, the fluid ejection device is disposed at the end of the rotating arm with the rotating shaft interposed therebetween, and the cleaning water is supplied to the chamber of each fluid ejection device. Then, each of the fluid ejection devices is
Water is spouted from the fluid ejection port of the nozzle in an oblique direction so that the reaction force generated by the washing water ejection causes the rotating arm to rotate in the same direction.

In this way, the water is discharged from the nozzle at the end of the rotating arm (water discharged by the nozzle revolution), and the rotating arm is rotated around the rotation axis and the tableware in the washing chamber is substantially rotated by the nozzle revolution. The cone-shaped spout can be evenly poured. Therefore, the washing ability of tableware can be further enhanced. In addition, since the rotating arm can be made smaller through miniaturization of the fluid ejection device itself, the effective inner volume of the dishwashing device can be increased and the dishwashing efficiency can be improved.

The fluid ejection device of the present invention can be applied to a device for cleaning the surface of a bathtub in addition to such a dishwashing device. In such a bathtub cleaning device, the fluid ejection device of the present invention is provided on the surface of a bathtub, and a chemical solution or cleaning water is sprayed on the opposing bathtub surface. This makes it possible to achieve the above-described widespread cleaning water and a high cleaning effect associated therewith. In addition, water can be conserved to the extent that a wide range of jets can be generated.

[0056]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples. FIG. 2 is a schematic perspective view showing the appearance of a toilet 30 having a flush water jetting device 40 according to an embodiment to which the present invention is applied. FIG. 3 is a schematic exploded perspective view for explaining the structure of the flush water jetting device 40. 5 is a schematic vertical cross-sectional view of the cleaning water jetting device 40, and FIG. 5 is a horizontal schematic cross-sectional view of the cleaning water jetting device 40.

The cleaning water jetting device 40 is applied to a local human body cleaning device for cleaning a local part (anus or the like) of a human body after defecation or the like, and is incorporated in the nozzle arm 31. The nozzle arm 31 can move forward and backward with respect to the toilet bowl, and advances to the cleaning position as shown in the figure at the time of local cleaning, and starts jetting of washing water from the washing water jetting device 40. The cleaning water jetting device 40 includes the chamber 2 for receiving the cleaning water, and jets the received cleaning water from the cleaning water jetting port 5. Hereinafter, the washing water ejection device 40 will be described in detail.

The washing water jetting device 40 includes a rectangular block 8 having a rectangular parallelepiped shape. The chamber 2 is closed by upper and lower lids 9 and 10 with O-rings 22 interposed therebetween at the upper and lower ends, and each lid is fixed to the square block 8 with bolts.

As shown in FIGS. 3 and 4, the upper lid 9 has a small-diameter upper through-hole 6A at the center thereof and a large-diameter lower through-hole 6B following the upper through-hole 6A. Make the ceiling opening. The stepped portion B between the upper through-hole 6A and the lower through-hole 6B serves as a receiver for the nozzle 4 described later. The lower lid 10 includes a concave portion 41 that functions as a catch for the nozzle 4 at the center of the convex portion.

As shown in FIG. 5, the square block 8 has a female screw hole 12 with a bottom at both ends in the longitudinal direction, and a communication hole 13 reaching the chamber 2 from the screw bottom surface. A cleaning water supply hose 50 is connected to the female screw hole 12, and the cleaning water is supplied to the chamber 2 from the hose by a pump (not shown). In this case, the female screw hole 12 is formed so as to be offset from the chamber 2 in the horizontal direction, and the communication hole 13 is formed so as to communicate with the chamber 2 on the outer peripheral wall. In addition, the communication holes 13 at both ends of the block body have a rotationally symmetric positional relationship. Therefore, when the cleaning water flows into the chamber 2 from both communication holes, a swirling flow is generated in the chamber 2 as shown by the arrow in FIG.

The nozzle 4 has the washing water jet 5 on the nozzle tip side, and has a flow path 19 for guiding the fluid received in the chamber 2 to the washing water jet 5. Also, the nozzle 4
A pair of blades 15 are provided on the lower end side, and the tip end side of the nozzle above the blades is a small-diameter portion 7 with a small diameter, and the lower side of the blades is a tapered projection 11. The nozzle 4 is assembled by inserting the reduced-diameter portion 7 into the upper through hole 6A of the upper lid 9, and is allowed to freely rotate in the through hole and change the position of the nozzle 4 in the direction of the nozzle axis O. Built in. In this case, the nozzle 4 is supported with the projection 11 at the lower end inserted into the recess 41 of the lower lid 10.

The flow path 19 formed in the nozzle 4 has a transverse flow path portion 19A penetratingly formed in the longitudinal direction of the blade 15 (radial direction of the nozzle 4) and 1.4 with respect to the nozzle axis O.
It is formed so as to communicate with the vertical flow path portion 19B inclined at an angle.

The front end opening of the vertical flow path portion 19B is
The cleaning water jet 5 is provided. Accordingly, the washing water jet port 5 is inclined 1.4 degrees with respect to the nozzle axis O, following the above-described inclined direction of the vertical flow path portion 19B.

When the cleaning water is supplied to the chamber 2 by the pump, the chamber 2 is filled with the cleaning water which has flowed under a pump pressure from a pair of communication holes 13 in contact with the chamber. Therefore, the nozzle 4 receives this cleaning water pressure (pump pressure) from the cleaning water, and changes its position (displaced upward) toward the outer side (upper side) of the nozzle tip. As a result, the end face A of the nozzle portion having a larger diameter than the reduced diameter portion 7 is connected to the upper through hole 6A on the upper lid 9 side.
In contact with the lower end surface B (corresponding to the chamber ceiling wall on the opening side). At this time, the rear end side of the nozzle 4 (the side of the protrusion 11) is in a state of floating in the washing water.

Since the cleaning water is continuously supplied to the chamber 2, the cleaning water is swirled by the pump pressure in the chamber 2 as described above. Therefore, the nozzle 4 is rotated (rotated) around the nozzle axis O by the washing water pressure (pump pressure) of the swirling flow of washing water. In addition, the cleaning water in the chamber 2 is guided to the horizontal flow path portion 19A and the vertical flow path portion 19B and reaches the cleaning water jet port 5. Therefore, the nozzle 4 ejects the washing water from the washing water ejection port 5 while rotating around the nozzle axis O.

Since the direction of the cleaning water jet 5 is set to be inclined with respect to the nozzle axis O, the cleaning water is jetted from the cleaning water jet 5 in a direction inclined with respect to the nozzle axis O. , And is ejected in a conical shape with this inclination. That is, the nozzle 4 injects the cleaning water onto the peripheral surface of the virtual cone whose central axis is the extended portion of the nozzle axis O, whereby the cleaning water can be injected over a wide range.

As described above, the nozzle 4 comes into contact with the lower end surface B of the upper through-hole 6A due to the displacement of the ascending position of the nozzle 4 so that the end surface A of the nozzle portion having a diameter larger than that of the reduced diameter portion 7 is brought into contact. Then, sealing between both end surfaces is achieved.

In such a sealing state, although there is a small amount of room for the cleaning water to enter between the both end surfaces, the entering cleaning water serves as a lubricant. For this reason, the resistance that the end face A of the nozzle portion receives from the lower end face B on the lower side of the upper through-hole 6A becomes smaller, so that the chamber 2
Even if the washing water pressure in the inside is small, a good nozzle effect can be achieved while exhibiting a good sealing effect. That is, the pressure of the cleaning water in the chamber 2 and thus the pump pressure can be reduced.

With respect to the cleaning water jetting device 40 having the above structure, the pressure of the cleaning water in the chamber 2 is set to about 0.01 MPa.
A jetting experiment was performed with the degree a. Even with such a low-pressure water supply, it was demonstrated that the cleaning water jetting device 40 of the present embodiment can operate the nozzle 4 without any trouble and jet the cleaning water in the conical shape. For this reason, according to the cleaning water jetting device 40 of the present embodiment, even if the supply pressure of the cleaning water to the chamber 2 is low, it is sufficient to reduce the size of the driving unit such as the pump for supplying the cleaning water. And operating costs can be reduced. Moreover, even with the low-pressure water supply as described above, the rotation of the nozzle 4 and the washing water jet 5 can be maintained at a high rotation without greatly reducing the speed. Therefore, even in the case of low-pressure water supply, the above-described conical cleaning water jet can be reliably realized, and the cleaning range is not narrowed.

In the cleaning water jetting device 40, the nozzle 4
The blades 15 that receive the fluid pressure are provided on the periphery of the cleaning water, so that the cleaning water can be efficiently received by the blades.
Therefore, since the rotation efficiency of the nozzle 4 can be increased, the room for low-pressure water supply can be expanded, and the drive unit can be further reduced in size and the operating cost can be reduced.

Next, a modification of the above embodiment will be described. FIG. 6 is a schematic vertical sectional view of a cleaning water jetting device 40 of a modified example, and FIG. 7 is a horizontal schematic sectional view of the cleaning water jetting device 40 of this modified example.

As shown in these drawings, in this modified example, among the flow paths 19 of the cleaning water in the nozzle 4, the horizontal flow path portion 19A is a closed flow path, and the cleaning water inlet 42 penetrates the both ends. Formed. In this case, since the directions of both the inlets are orthogonal to the blade surface of the blade 15, the washing water flowing from each inlet into the lateral flow path portion 19 </ b> A is also supplied to the nozzle 4.
Acts to rotate as described above. Therefore, it is more advantageous to reduce the size of the driving unit and the operating cost.

Next, another embodiment will be described. FIG.
FIG. 9 is an enlarged schematic explanatory view of a vertical cross section of a cleaning water jetting device 40 of another embodiment and a main part thereof, and FIG. 9 is a horizontal schematic cross sectional view of the cleaning water jetting device 40.

As shown in the figure, the cleaning water jetting device 40 of this embodiment differs from the cleaning water jetting device of the first embodiment in the configuration of the nozzle 4 and the like. Hereinafter, the differences will be described.

The washing water jetting device 40 also has the chamber 2 and the outer periphery of the upper through hole 6A which is the ceiling opening is depressed. Thereby, the upper through hole 6
A is an edge-shaped opening whose axial dimension is reduced. The nozzle 4 is incorporated by inserting the reduced diameter portion 7 on the nozzle tip side into the upper through hole 6A. In the nozzle 4 thus assembled, the washing water jet port 5 faces the outside of the through-hole in the upper through-hole 6A, and the nozzle 4 is freely rotatable and the position of the nozzle 4 can be changed in the direction of the nozzle axis O. It has been. In this case, the reduced diameter portion 7
The end face A of the nozzle portion having a larger diameter than that of the nozzle portion is formed in a spherical shape as shown in the enlarged view of the main part.

The nozzle 4 has a lower end 4 having a reduced diameter at its lower end.
And a round hole-shaped recess 4 at the tip (upper end) side of the lower lid 10.
3, the lower end portion 44 is inserted. The recess 43 is
Since the diameter is set to about 1.3 times the diameter of the lower end 44, the lower end 44 functions as a nozzle guide when the position of the lower end 44 is changed in the radial direction in the recess 43.

Due to the guide function for changing the position of the lower end portion 44 in the radial direction by the concave portion 43 and the narrowing of the upper through hole 6A formed as an edge in the axial direction, the nozzle 4 moves the center axis P of the upper through hole 6A. Can be taken at an angle of about 1.78 degrees. The nozzle 4 can revolve around the central axis P in this inclined posture. Details of how the nozzle revolution occurs will be described later.

In this embodiment, the nozzle 4 forms a flow channel 19 for guiding the cleaning water to the cleaning water jet port 5 with the flow channel portion 19A and the flow channel portion 19B. The flow path portion 19A is a cross-shaped horizontal flow path formed through the vicinity of the central portion in the nozzle longitudinal direction so as to be orthogonal to the nozzle axis O. Flow path portion 19B
Are formed vertically along the nozzle axis O, communicate with the flow path portion 19A, and reach the washing water jet port 5 on the distal end side.

The cleaning water is supplied to the chamber 2 by a pump (not shown).
, The chamber 2 is filled with the inflow cleaning water as described above, and the nozzle 4 is supplied with the cleaning water pressure (pump pressure).
From the washing water, the position is changed (displaced upward) toward the outer side (upper side) of the nozzle tip. This allows
The end surface A on the larger diameter side than the reduced diameter portion 7 contacts the lower end surface B (corresponding to the chamber ceiling wall on the opening side) of the upper through hole 6A on the upper lid 9 side. At this time, the lower end 44 of the nozzle 4 floats in the washing water, and the lower end 44 is
Receive the guide above. That is, the nozzle 4 can adopt the above-described inclined posture.

The nozzle 4 rotates (rotates) around the nozzle axis O by the washing water pressure (pump pressure) of the swirling washing water in the chamber 2 when the washing water is continuously supplied to the chamber 2. At this time, the nozzle 4 is connected to the upper through hole 6A.
The nozzle 4 rotates (revolves) around the central axis P of the upper through-hole 6A. In addition, the cleaning water in the chamber 2 is guided to the horizontal flow path portion 19A and the vertical flow path portion 19B and reaches the cleaning water jet port 5. Therefore, the nozzle 4 ejects the washing water from the washing water ejection port 5 while rotating around the nozzle axis O and revolving around the central axis P in the inclined posture.

As a result, the washing water jet from the washing water jet port 5 becomes a conical shape centered on the opening center axis P of the upper through hole 6A in the chamber 2, and the fluid can be jetted in a wide range. . That is, the nozzle 4 can jet the cleaning water onto the peripheral surface of the virtual cone whose central axis is the extension of the central axis P of the upper through hole 6A, and can jet the cleaning water over a wide range.

As described above, the nozzle 4 is brought into contact with the lower end surface B of the upper through-hole 6A by the displacement of the ascending position of the nozzle 4 so that the end surface A of the nozzle portion is brought into contact with the lower end surface B of the nozzle 4 so that the seal between both end surfaces is formed. Plan.

In such a sealing state, although there is a small amount of room for the cleaning water to enter between the two end surfaces, the entering cleaning water plays a role of a lubricant. For this reason, the resistance that the end face A of the nozzle portion receives from the lower end face B on the lower side of the upper through-hole 6A becomes smaller, so that the chamber 2
Even if the washing water pressure in the inside is small, a good nozzle effect can be achieved while exhibiting a good sealing effect. That is, the pressure of the cleaning water in the chamber 2 and thus the pump pressure can be reduced.

When the above-described cleaning water jetting device 40 was also subjected to the jetting test at a low water supply pressure (about 0.01 MPa) as described above, the nozzle 4 was operated without hindrance, and the washing water was conical. It was proved that it could erupt.
For this reason, the washing water ejection device 40 of the present embodiment also
It is possible to reduce the size of a driving unit such as a pump for supplying cleaning water and reduce the operating cost. In addition, even with the low-pressure water supply as described above, the nozzle 4 and its washing water jet 5
High rotation speed can be maintained without reducing the cleaning range.

In this embodiment, the lower end portion 44 is guided by the concave portion 43 when the nozzle 4 adopts the inclined posture, so that the nozzle inclined posture at the time of the nozzle revolution around the central axis P of the opening is stabilized. . Therefore, it is possible to stabilize the condition of the spouted washing water, and to reliably wash the spouted washing water at the washing location.

In this case, the nozzle inclination posture can be easily set to a desired posture by variously adjusting the dimensional relationship between the lower end portion 44 and the concave portion 43. For this reason, the landing range (washing range) of the ejection target (washing location) of the jetted washing water can be adjusted in a wide and narrow range.

In the cleaning water jetting device 40 of this embodiment, the end face A of the nozzle portion having a larger diameter than the reduced diameter portion 7 is formed into a spherical shape in order to contact the end faces. Therefore, the rotation resistance that the rotating and revolving nozzle 4 receives from the end face B on the side of the chamber 2 can be further reduced. As a result, the efficiency of the rotation and revolution of the nozzle 4 is increased, and the responsiveness to the low supply water pressure is increased, so that it is possible to further reduce the size of the driving unit and reduce the operating cost.

Further, since the end face A of the nozzle portion having a larger diameter than the diameter-reduced portion 7 is spherical, stabilization of point contact and prevention of abrasion due to the contact between the end face A and the end face B are prevented. Is even more beneficial. In particular, when the nozzle 4 is revolving in an inclined posture, the gap around the upper through-hole 6A other than the point contact points on the both end faces can be narrowed, so that the amount of washing water passing through the gap can be reduced. Therefore, the washing water can be effectively used for jetting from the washing water jet port 5.

In the above embodiment, the nozzle 4 is made of a material having excellent slidability and abrasion resistance, for example, a resin such as polyacetal, nylon, polypropylene, polytetrafluoroethylene, silicone, ABS, PPS or the like, stainless steel or the like. Metal. Therefore, abrasion due to the contact between the end surfaces and the contact between the lower end portion 44 and the inner wall of the concave portion 43 can be reliably suppressed. In particular, if the nozzle 4 is made of metal, the heat radiation efficiency of the wear heat generated by these contacts can be increased. As a result, it is possible to avoid melting and fixing of the members due to frictional heat, and it is possible to enhance the reliability of the nozzle revolution and, consequently, the ejection of the washing water. Moreover, if the nozzle 4 is made of metal, the weight of the nozzle can be increased accordingly. For this reason, the inertia exhibited by the nozzle is increased, and the centrifugal force, which will be described later, accompanying the orbit of the nozzle can be increased, and the nozzle inclination attitude during the orbit can be stabilized, which is preferable. When the nozzle 4 is made of metal such as stainless steel, it is more preferable to reduce the surface roughness. The nozzle 4 may be made of metal at the site where wear occurs and resin at other sites. Such a nozzle 4 can be easily manufactured by a so-called two-color molding technique of metal and resin.

Next, a modification of the above-described other embodiment will be described. This modified example is different from the other embodiments described above in the nozzle configuration. FIG. 10 shows a cleaning water jetting device 40 according to a modification.
Explanatory diagram showing an enlarged schematic vertical cross section and its main parts,
FIG. 11 is a schematic cross-sectional view in the horizontal direction of the cleaning water jetting device 40 of this modified example.

The nozzle 4 in this modification is formed in a hollow shape, and the hollow portion is formed in the flow path 19 to the washing water jet port 5.
And The flow path 19 is reduced in diameter on the side of the washing water jet port 5 on the tip end side of the nozzle, and the washing water flowing from the lower end of the flow path is guided to the cleaning water jet port 5 after being rectified in the reduced diameter flow path portion. In addition, a plurality of through-holes may be formed in the peripheral wall of the nozzle 4 so as to receive the washing water from the radially outer side in the flow path 19.

The nozzle 4 has a lower lid 10 at its lower end opening.
The truncated cone-shaped convex portion 45 on the tip (upper end) side of is inserted. Since the maximum diameter of the convex portion 45 is set to about 1 / 1.3 times the size of the lower end side opening of the nozzle 4, the convex portion 45 is inserted into the lower end side opening in a state where the convex portion 45 is inserted into the lower end side opening. The nozzle 4 functions as a guide when the nozzle 4 changes its position in the radial direction.

The upper through-hole 6 A, which is the ceiling opening of the chamber 2, is formed as an edge-shaped opening whose axial dimension is reduced, or the nozzle portion having a larger diameter than the reduced diameter portion 7 of the nozzle 4. This embodiment is the same as the other embodiments described above in that the end face A is formed as a spherical surface.

Also in this modified example, the nozzle 4 is formed in the upper through-hole 6A by the radial position guide function of the nozzle 4 by the convex portion 45 and the axial center dimension of the upper through-hole 6A formed as an edge-shaped opening. About 1.7 with respect to the central axis P of 6A
It can take a posture inclined by 8 degrees. Then, the nozzle 4 revolves around the central axis P in this inclined posture.

Even in this modification, the supply of the washing water to the chamber 2 causes the above-described displacement of the nozzle 4 in the ascending position, so that the end face A on the larger diameter side than the reduced diameter portion 7 is moved to the upper lid 9 side. The lower end surface B (corresponding to the chamber ceiling wall on the opening side) is brought into contact with the lower side surface of the upper through hole 6A. At this time, the lower end of the nozzle 4 floats in the washing water, and the nozzle 4 is guided by the convex portion 45 through the opening at the lower end of the nozzle, and adopts the above-described inclined posture.

The nozzle 4 adopts such a contact state, causing the nozzle 4 to rotate around the nozzle axis O due to the pressure of the cleaning water and revolve around the central axis P of the upper through hole 6A in an inclined posture. Cleaning water is spouted from the spout 5.

Thus, also in this modified example, the cleaning water jet from the cleaning water jet port 5 has a conical shape centered on the opening central axis P of the upper through hole 6A in the chamber 2, and the fluid can be spread over a wide range. Can squirt. That is, the nozzle 4 jets the washing water onto the peripheral surface of the virtual cone whose central axis is the extension of the central axis P of the upper through hole 6A,
The cleaning water can be spouted over a wide range.

Further, in this modification, the flow path 19 penetrates in the axial direction of the nozzle, so that the weight of the nozzle 4 can be reduced. Therefore, the inertia exhibited by the nozzle itself is reduced, and the nozzle can be easily inclined and revolved due to the fluid pressure, and the startability and the number of revolutions can be increased.

The state of contact between the end face A on the nozzle side and the end face B on the chamber side is the same as in the other embodiment described above. The above-described effects, such as downsizing of a drive unit such as a pump and reduction of operation cost, can be obtained.

Next, another modified example of the above embodiment will be described. This other modified example is different from the above-described modified example in the state of holding the nozzle inclination posture. FIG. 12 is a vertical schematic cross-sectional view of a cleaning water jetting device 40 of another modified example and an explanatory view showing an enlarged main part thereof, and FIG. 13 is a horizontal schematic cross-sectional view of the cleaning water jetting device 40 of this modified example. .

As shown, in this modification, the lower lid 1
Reference numeral 0 is different from the above-described modification in that it has no convex portion 45 on the tip (upper end) side and that the upper lid 9 extends into the chamber 2 and makes the lower through-hole 6B deep. I do.

In this modification, when the nozzle 4 takes an inclined posture and revolves around the central axis P of the upper through-hole 6A, the nozzle 4 causes the end faces A and B to come into contact with each other and the upper cover 9
The nozzle 4 is guided by the peripheral wall of the lower through hole 6 </ b> B contacting the nozzle 4. Even in this modification, the same effect as in the above-described modification can be obtained.

In the embodiments and modifications described above, a pair of communication holes 13 are provided symmetrically in the corner block 8 in order to supply the cleaning water to the chamber 2. However, only one communication hole 13 may be formed to supply the cleaning water to the chamber 2 from only one water supply hose 50.

The lower end surface B of the upper through hole 6A may be formed in a spherical shape. Further, the lower end surface B of the upper through hole 6A and the end surface A of the nozzle portion having a larger diameter than the reduced diameter portion 7 are formed.
Both can be formed in a spherical shape.

Here, the manner in which the nozzle 4 in the chamber 2 revolves around the central axis P of the upper through hole 6A due to the supply of the washing water in the embodiments and modifications shown in FIGS. 8 to 13 will be described in detail. I do. FIG. 14 is an explanatory diagram illustrating the behavior of the nozzle 4 after the cleaning water flows into the chamber 2 and the state of the force applied to the nozzle 4 over time, and FIG. 15 is a diagram illustrating that the nozzle 4 adopts such behavior. It is explanatory drawing explaining the state of the obtained washing water ejection. In addition, in order to simplify the description, a case where the cleaning water is supplied to the chamber 2 from the single communication hole 13 will be described.

As shown in FIG. 14, the communication hole 13
Then, the washing water flows into the chamber 2 (time t0).
When the cleaning water flows into the chamber 2 in this manner, the cleaning water generates a swirling flow along the inner wall in the chamber 2 as described above. This swirling flow is a swirling flow that swirls around a nozzle 4 (specifically, a large-diameter nozzle portion of the nozzle 4) located substantially at the center of the chamber 2. The flow velocity in this swirling flow is the flow velocity Ui at the communication portion of the communication hole 13.
n is the highest.

The place where the inflow cleaning water first starts to swirl, that is, the peripheral wall portion 2a which is an extension of the opening of the communication hole 13;
There is a difference between the flow velocity Ua and the flow velocity Ub between the peripheral wall part 2b and the peripheral wall part 2b facing the part.
b. In other words, while the cleaning water spreads (turns) from the peripheral wall portion 2a to the peripheral wall portion 2b, it is affected by flow dispersion in the chamber 2, contact of the cleaning water with the inner wall surface of the chamber 2, cleaning water viscosity, surface friction, and the like. , The washing water slows down.
Therefore, a difference in the flow rate of the cleaning water occurs around the nozzle 4. In this case, although the moving object is the fluid (washing water), the relative relationship between the washing water and the nozzle 4 is the same as the situation where the object moves in the fluid.

Therefore, when an object moves through the fluid, a situation in which lift acts on the object based on the speed difference of the fluid sandwiching the object occurs between the cleaning water in the chamber 2 and the nozzle 4. , A force of the same quality as the lift acts on the nozzle 4. This lift acts as one mode of the washing water pressure exerted on the nozzle 4 by the washing water flowing into the chamber 2 as described in the above-described embodiments and the like. For the sake of convenience, this force is referred to as lift, as described above. However, if other phenomena are used as an example, the fact that lift is generated due to the difference in velocity of the fluid means that the surface of the aircraft wing surface This is similar to generating lift by a speed difference, that is, a pressure difference.

[0109] As shown in FIG.
At the time t0 when the file 4 enters, the following occurs. this
A swirling flow occurs around the nozzle 4 stopped at time t0.
Therefore, the lift F_LIs the swirling flow of the peripheral wall portion 2a.
It is affected by the speed Ua [m / sec]. And this lift
F_LIs the maximum projected area of the nozzle 4 receiving the lift, S
[m ^Two], The density of washing water is ρ [kg / m^Three] Then
expressed. C in the formula_LIs the lift coefficient.

F _L = (ρ · V ² · _CL · S) / 2 [N]

[0111] Thus the lift F _L acts on the nozzle 4, as a result the nozzle 4 drag _{F D (= (ρ · V} 2
・_CD・ S) / 2 [N]) also acts. This C _D is a drag coefficient. This drag also acts as one mode of the cleaning water pressure exerted on the nozzle 4 by the cleaning water flowing into the chamber 2 as described in the above embodiments and the like.

The maximum projected area S in the above equation is determined by the nozzle 4
(More specifically, a large-diameter nozzle located in the chamber 2) L [m]. Therefore, if the length L of the nozzle 4 is increased, the lift / drag can be increased.

As shown at time t0 in FIG. 14, when a swirling flow occurs around the nozzle 4 in the chamber 2, a lift acts on the nozzle 4 as described above. This lift acts outward from the center side of the swirling flow on the side of the peripheral wall portion 2a where the flow speed of the swirling flow around the nozzle 4 is large. On the other hand, the nozzle 4
In the chamber 2, the upper through-hole 6 </ b> A
Of the lift F
In response to _L is inclined in the direction indicated by the arrow F _L. Thus, when the nozzle 4 tilts toward the inner wall side of the chamber 2, the time t
In 1, the lift force F _L and drag F _D are both acts move in the force direction. This resultant force acts in a direction in which the nozzle 4 is moved along the flow direction of the swirling flow because the drag is along the flow direction of the swirling flow.

In this case, the passage interval of the swirling flow becomes narrow on the side where the nozzle 4 is inclined, and the swirling flow velocity increases due to the narrowing. Since this situation occurs in such a way that the narrow space moves around the nozzle 4, the area with the highest flow velocity of the swirling flow also moves along the inner peripheral wall of the chamber 2. Therefore, with the movement of the largest part of the flow rate, since the orientation also changes the direction and drag force F _D of lift F _L, the time t2, t3, t
As the process proceeds to 4, the nozzle 4 moves in the flow direction of the swirling flow while maintaining the inclined posture. When the nozzle 4 starts revolving under the influence of lift / drag, the chamber 2
A centrifugal force acts on the nozzle 4 in the radial direction.
This centrifugal force also acts as one mode of the cleaning water pressure exerted on the nozzle 4 by the cleaning water flowing into the chamber 2 as described in the above embodiments and the like.

For this reason, the nozzle 4 takes an inclined posture in a state where the end faces are in contact with each other, and revolves around the center axis P of the upper through hole 6A in the chamber 2. Nozzle 4
Since the revolution occurs in this manner, as described above, the washing water is spouted onto the peripheral surface of the virtual cone whose central axis is the extension of the central axis P of the upper through hole 6A, and the washing water is spread over a wide range. It gushes.

During the jetting of the conical cleaning water, the maximum inclination angle of the nozzle 4 is restricted by the concave portion 43 or the convex portion 45 or the peripheral wall of the lower through hole 6B. It is easy to avoid revolving on a large slope.

In addition, as described above, the nozzle 4 has the lift F _L
When receiving the impact sloping inner wall of the chamber 2, the nozzle 4 is subjected to drag force F _D in the direction directly pressed swirling flow of the chamber 2. Therefore, the nozzle 4 in the inclined posture is also moved in the direction of the swirling flow while maintaining the inclined posture under the influence of the centrifugal force described above, and the revolution of the nozzle 4 is promoted.

Here, such a state of orbital discharge water will be described with reference to the drawings. As shown in FIG. 15, when the nozzle 4 revolves as described above, the cleaning water jet port 5 revolves while changing the water discharge direction with the revolution of the nozzle 4. Therefore, the washing water jet 5 jets the washing water while drawing a spirally enlarged trajectory, thereby realizing the conical washing water jet as described above. Therefore, the trajectory of the washing water jet is a conical trajectory that is much larger than the trajectory of the washing water jet port 5, and the local part can be washed over a wide range.

Further, in order to perform such a wide range of cleaning, it is sufficient that the swirling flow is caused by inflow of the cleaning water into the chamber 2 and the nozzle 4 is caused to revolve by the swirling flow. That is, at the time of wide-area cleaning, the movable member can be only the small nozzle 4 that can be incorporated into the chamber 2 provided on the nozzle arm 31.

Further, wide-area cleaning by the above-described conical cleaning water jetting can be easily realized by incorporating the nozzle 4 into the chamber 2 and generating a swirling flow by introducing the cleaning water into the chamber 2. Thus, the configuration can be simplified and the cost can be reduced, and the device can be downsized through the simplification of the configuration.

The flow rate of the cleaning water flowing into the chamber 2 was increased by setting the communication hole 13 for flowing the cleaning water into the chamber 2 to have a smaller cross-sectional area for water flow than the water supply hose 50. Washing water flow rate flowing into the chamber 2, define a lift F _L as previously described. Therefore, if the communication holes 13 having various cross-sectional areas of water penetration (specifically, the square blocks 8 having the communication holes 13 of various diameters) are prepared, and these are selectively used, the effect on the nozzle 4 can be obtained. other lift F _L to drag-centrifugal force can be adjusted. These forces also determine the frequency of the revolution of the nozzle 4. Therefore, the revolving frequency of the nozzle 4 can be adjusted by adjusting the cross-sectional area of the water passing through the communication hole 13 or selecting the square block 8. Therefore, there are the following advantages.

Assuming that the force and the area at the moment when the cleaning water hits the object to be cleaned such as a human body are F1 and ΔS, respectively, the strength of the cleaning water felt at a certain moment can be defined as F1 / ΔS. When the nozzle revolution frequency of the nozzle 4 is f1 and the water discharge is continued at this frequency, the total area S corresponding to the object to be cleaned such as the human body at the time interval of the cycle (Δt = 1 / f1) which is the reciprocal of the frequency f1 is: , The value obtained by integrating ΔS during this period Δt (S = ∫ΔS).

On the other hand, when a person perceives a stimulus with the skin or the like, the stimulus receptor varies depending on the person and the place where the stimulus is received. Or an illusion of being stimulated in the same way as continuous. Therefore, at a certain moment, the stimulus of the intensity F1 / ΔS is moved on a trajectory having a period of Δt (total trajectory S = ∫Δ
In the case of S), an illusion appears as if the person is receiving a stimulus of the intensity F1 / ΔS in the total area S. This tendency becomes more pronounced as Δt is smaller, and starts to be felt from f = about 3 Hz, that is, Δt = about 0.3 seconds.

Therefore, by adjusting the cross sectional area of the water through the communication hole 13 and selecting the square block 8, the revolution frequency f1 of the nozzle 4 is adjusted.
Can be about 3 Hz or more. In this case, the washing area can be increased without impairing (decreasing) the stimulation of the washing.

Further, the instantaneous force F1 (hereinafter referred to as force F1)
), The relationship between the amount of washing water Q1 ejected can be expressed by the following equation, where S1 is the area of the ejection port and V1 is the flow rate of the washing water.

F1 = ρ · Q · V1 = ρ · Q ² · Q / S1

As is apparent from this equation, the force F1 is proportional to the square of the instantaneous flow rate Q and inversely proportional to the ejection port area S1. Therefore, when reducing the flow rate by saving water, the force F1 can be increased by reducing the area S1 of the washing water jet port 5. Therefore, it can be seen that in order to reduce or increase the amount of water to improve or maintain the stimulation at the time of cleaning or the cleaning power, the jetting area S1 should be reduced, that is, the flow rate of the jetted cleaning water should be increased.

Further, the revolving frequency f1 of the nozzle 4 can be set to about 40 Hz or more by adjusting the cross sectional area of water passage of the communication hole 13 and selecting the square block 8. This makes it possible to revolve the nozzle 4 at a high speed and move the cleaning point where the jetted cleaning water lands at a high speed. Therefore, it is possible to give an illusion that the human body is receiving water in the entire area where water is discharged (collection of water landing points). For this reason, it is preferable to perform the above-described frequency adjustment because it is possible to realize a soft and wide-ranging cleaning request by an illusion caused by a high-speed movement of a landing point. More specifically, in a bidet cleaning device for a female local cleaning device that is sensitive to stimuli or a bidet cleaning device for a general local cleaning device, a wide range of water discharge cleaning can be performed while suitably reducing the irritating feeling.

In addition, since the above-mentioned illusion is caused even when the transition of water landing on the washing point actually occurs, it is necessary to continuously discharge water so that the washing water simultaneously reaches all of the landing area. do not do. Therefore, there is a water saving effect.

Next, the manner in which the nozzle 4 in the chamber 2 rotates (rotates) around the nozzle axis O due to the supply of the washing water in the embodiments and modifications shown in FIGS. 8 to 13 will be described in detail. . FIG. 16 is an explanatory diagram for explaining the relationship between the revolution of the nozzle 4 and the rotation. FIG. 16A is an explanatory diagram showing the case where the revolution and the rotation of the nozzle 4 have the same rotation direction.
6 (b) is an explanatory diagram showing a case where the revolution direction of the revolution of the nozzle 4 is opposite to that of the rotation, and FIG. 17 is an explanatory diagram showing a state of jetting of washing water when the nozzle 4 adopts the behavior of FIG. FIG. 17A is an explanatory view illustrating the state of jetting of cleaning water when the nozzle revolution and rotation are in the same direction, and FIG. 17B is a diagram illustrating the cleaning water jetting when the nozzle revolution and rotation are in the opposite direction. It is explanatory drawing explaining a situation.

The nozzle 4 revolves in the same direction as the swirling flow shown in FIG. At the time of the nozzle revolution, as described above, at the abutting portions (end surfaces A and B) of the nozzle 4, only a slight slip resistance acts due to the lubrication function by the infiltration cleaning water described above. Therefore, in a state in which only such contact occurs (for example, a state in which the lower end portion 44 is not in contact with the concave portion 43 in FIG. 8 or a configuration in which such contact does not occur), the nozzle 4 is caused to revolve by the lift based on the swirling flow. The nozzle 4 tries to rotate itself against the slight sliding resistance of the nozzle 4. Therefore, the nozzle 4 revolves inside the swirl chamber while rotating in the same direction as the swirling direction (revolution direction) of the washing water.

Therefore, the nozzle 4 that is revolving and rotating in the same direction jets the cleaning water along the locus schematically shown in FIG. FIG. 17 (a) shows the directions of the rotation trajectory of the cleaning water at the cleaning water jet port 5 by the rotation of the cleaning water and the movement trajectory of the cleaning water by the nozzle revolution on an arbitrary plane perpendicular to the jetting direction, using arrows. Easy to show. That is, the cleaning water is spouted while rotating counterclockwise by the rotation of the nozzle 4, and such spout revolves counterclockwise by the revolution of the nozzle 4. Therefore, since the rotation direction of the cleaning water coincides with the rotation direction of the cleaning water on the outer circumference of the orbit of the cleaning water, the large amount of air generated by the sum of the rotation speed of the cleaning water and the rotation speed of the cleaning water on the outer circumference of the orbit. Receive resistance. Washing water by this air resistance,
The turbulence is generated from the stream of water over time, and it is torn off and dispersed in the form of water droplets. For this reason, the washing water ejected from the nozzle 4 under this condition travels along the orbit in the form of dispersed water droplets and reaches the human body, so that a wider area can be washed softer.

On the other hand, in the nozzle 4 shown in FIG. 8, FIG. 10, and FIG.
It is in contact with the inner wall of the concave portion 43, the outer wall of the convex portion 45, or the inner wall of the chamber 2. In this state, since the slip resistance of the nozzle 4 against the revolution is increased as compared with the above-described state, the nozzle 4 may not be able to rotate in the same direction as the revolution with the above-mentioned revolution force. Even in this case, since the nozzle 4 revolves due to the revolving force, the nozzle 4 receives the sliding resistance at the contact point and receives the inner wall of the concave portion 43 or the convex portion 4.
5 Rotate while inscribing the outer wall or the inner wall of the chamber 2.

The rotation direction in this case is determined by the position where the nozzle 4 receives the slip resistance. That is, in the case of the outer wall of the convex portion 45 shown in FIG. 10, the direction is the same as the revolving direction of the nozzle 4, and the nozzle 4 revolves in the same direction while revolving to discharge the cleaning water. On the other hand, the recess 43 shown in FIGS.
In the case of the inner wall or the inner wall of the chamber 2, the direction of rotation is opposite to the direction of revolution of the nozzle 4. The nozzle 4 rotates and rotates in the opposite direction to discharge cleaning water while revolving. In addition, when the rotation direction and the revolution direction of the nozzle are the same, since the rotation energy of the jetted cleaning water acts on the nozzle revolution,
The nozzle revolution can be caused more efficiently.

The nozzle 4 that is revolving and rotating in the opposite direction jets the cleaning water along a locus schematically shown in FIG. 17B. In other words, the washing water is spouted while rotating clockwise by the rotation of the nozzle 4, and such jetting of the washing water revolves counterclockwise by the revolution of the nozzle 4. Therefore, since the rotation direction of the cleaning water is opposite to the rotation direction of the cleaning water on the outer circumference of the orbit of the cleaning water, the comparison of the cleaning water caused by the difference between the rotation speed of the cleaning water and the rotation speed of the cleaning water on the outer circumference of the orbit is performed. It receives only small air resistance. Because of the relatively small air resistance,
The washing water is jetted continuously without relatively dispersing and maintaining a relatively large water flow condition. Therefore, the washing water ejected from the nozzle 4 under this condition lands on the human body in a relatively well-balanced water flow condition, so that more stimulating and strong washing can be performed. In addition, it is possible to perform the washing with less scattering by gathering the discharged water.

As shown in FIG. 16, when the diameter of the communication hole 13 is different, the flow rate of the washing water flowing into the chamber 2 can be made different. Therefore, the speed difference described above can be easily created, which is useful for generating a lift or the like based on the swirling flow in the chamber 2. It is needless to say that the communication holes 13 may have the same diameter.

Next, the point that the nozzle 4 is inclined with respect to the central axis of the opening of the chamber 2 will be described in detail. FIG. 18 is an explanatory diagram for explaining a first method when the nozzle 4 is set in the inclined posture.

As shown in the figure, in order to adopt this first method, the chamber 2 has a ceiling opening 2A on the ceiling wall thereof, and a tapered wall-shaped guide hole 2B and a bottom hole 2C below it. . The ceiling opening 2A is an opening corresponding to the upper through-hole 6A in the washing water ejection device 40 shown in FIG. 8 and the like described above, and is an edge-shaped opening having a small axial dimension.

The washing water flowing into the chamber 2 from the communication hole 13 becomes a swirling flow as described above in the chamber 2 including the bottom hole 2C, and causes the nozzle 4 to revolve as described above. The nozzle 4 takes an inclined posture due to the above-described lift and the like accompanying the nozzle revolution. At this time, the nozzle 4
The reduced diameter portion 7, the large diameter portion 4 </ b> A, and the step end surface 7 </ b> A (the end surface A in the above embodiment) are brought into contact with the ceiling wall 2 </ b> D of the chamber 2. The nozzle 4 causes contact on the side of the reduced diameter portion 7 and causes the peripheral wall of the large diameter portion 4A to contact the edge of the lower end of the guide hole 2B. In other words, the nozzle 4 makes contact at two contact points T1 and T2 shown in the figure, and the inclined posture is defined at both contact points, and the posture is stabilized.

Further, since the contact points T1 and T2 are separated from the ceiling wall 2D and the lower end edge of the guide hole 2B on the side wall of the chamber, it is possible to further stabilize the inclined posture. In addition, since the contact portions are separated in this way, even if the ceiling opening 2A is made small, it does not affect the expression and reproducibility of the nozzle inclination posture. In addition, if the ceiling opening 2A has a small diameter, the gap around the ceiling opening is also reduced, so that the amount of passing fluid can be reduced while maintaining the lubrication function by the leaked cleaning water.

Then, the nozzle 4 jets the washing water while revolving around the central axis of the ceiling opening 2A in the inclined posture defined as described above. Fig. 1
5 as described above. Note that the nozzle 4 described with reference to FIG.
The contact at the end surfaces A and B is the contact at the contact point T1, and the contact between the concave portion 43 and the lower end portion 44 is the contact at the contact point T2. Even in the nozzle 4 described with reference to FIG. 10, the first method is adopted, and the contact at the end surfaces A and B becomes the contact at the contact point T1, and the contact between the convex portion 45 and the nozzle lower end opening. Is the contact at the contact point T2.

Therefore, even if the nozzle inclination posture is defined by the first method, the cleaning water jet from the nozzle 4 becomes conical with the center axis of the ceiling opening 2A in the chamber 2 as a center, and is wide. Fluid can be jetted into the area.

When the nozzle revolves while taking such an inclined posture, the lubrication function is exerted by the passage of the leaked cleaning water as shown in the figure. Therefore, as described above, since the resistance that the nozzle 4 receives from the ceiling wall 2D of the chamber 2 can be reduced, the above advantages such as downsizing of the drive unit and reduction of operation cost can be achieved. In addition, even if the cleaning water supply pressure is low, the rotation of the nozzle can be maintained at a high rotation, so that the spread degree of the jetted cleaning water is not narrowed.

Further, in the first method, the rotational resistance at the contact point T1 of the ceiling wall 2D is small due to the lubricating action of the leakage cleaning water, and the contact point T2 is also a point contact. Only a small rotational resistance acts. However, since the nozzle 4 is free in the chamber,
Since these rotational resistances act as frictional resistance on the nozzle 4, as described with reference to FIG.
Rotates around its own nozzle center axis. For this reason, the contact point T1 of the nozzle 4 with respect to the ceiling wall 2D changes around the rotation axis due to the rotation of the nozzle, and a situation in which a fixed portion remains in contact with the ceiling wall 2D does not occur. Therefore, the wear of the nozzle 4 can be reliably suppressed.

Since the reduced diameter portion 7 at the tip of the nozzle is inserted into the ceiling opening 2A, the washing water passing through the gap around the ceiling opening 2A does not interfere with the jetted washing water. For this reason, since the conical jet cleaning water is not disturbed, the jetting of the cleaning water can be stabilized.

[0146] Such a first technique can be realized as follows. FIG. 19 is an explanatory view for explaining another mode when the first method for defining the nozzle inclination posture is adopted, and FIG.
It is explanatory drawing explaining the other aspect of a technique.

As shown in these figures, in these embodiments, the nozzle 4 does not have the reduced diameter portion 7 but comprises only the large diameter portion 4A. Even in this nozzle 4, the tip 4B of the large diameter portion 4A is brought into contact with the ceiling wall 2D at the contact point T1 instead of the step end face 7A, and the other is brought into contact with the contact point T2. In FIG. 19, the tip 4B is tapered, and in FIG. 20, it is spherical.

In such an embodiment, although the nozzle 4 is entirely incorporated in the chamber 2 and does not project out of the chamber, the cleaning water jet 5 is connected to the ceiling opening 2 of the chamber 2.
There is no change that he faces outside of A.

Even in the embodiment shown in FIGS. 19 and 20, the nozzle 4 can provide the same effect as the nozzle having the reduced diameter portion 7. In particular, such an embodiment has the following advantages.

Since it is not necessary to insert the reduced diameter portion 7 in the ceiling opening 2A, the diameter of the ceiling opening 2A can be made smaller. Therefore, the gap around the ceiling opening 2A is also reduced, so that the amount of passing cleaning water can be further reduced while maintaining the lubricating function of the leaking cleaning water.

Further, since there is no protrusion of the nozzle to the outside of the chamber 2, even if the chamber 2 is in
There is no contact of the nozzle with the cleaning location. For this reason, a situation where the nozzle revolution is stopped from the outside does not occur, and there is no hindrance to the ejection of the washing water.

In addition, the ceiling opening 2A can be made small enough not to hit the water discharge, and the diameter of the movement locus of the contact point T1 can also be made small. Therefore, the range in which the water pressure in the chamber is applied becomes narrower, and the rotation of the nozzle can be maintained even when the cleaning water supply pressure is low.

FIG. 21 is an explanatory diagram for explaining a second method when the nozzle 4 is in the inclined position, and FIG. 22 is an explanatory diagram for explaining a third method when the nozzle 4 is in the inclined position. FIG.
As shown in FIG. 1, in the second method, in addition to the contact of the step end face 7A at the contact point T1, the nozzle 4 contacts the outer periphery of the reduced diameter portion 7 with the opening wall of the ceiling opening 2A at the contact point T3. Contact Even in this case, the nozzle inclination posture is defined by the contact at these two positions, and the posture is stabilized.

In the embodiment shown in FIG. 21, the above-described effects can be obtained by inserting the reduced diameter portion 7 into the ceiling opening 2A, and the following advantages are obtained.

As described above, the nozzle inclined posture occurs at the contact point T3 of the ceiling opening 2A and the contact point T1 of the ceiling wall 2D, and both contact points are located across the ceiling opening 2A.
For this reason, by adjusting the diameter of the ceiling opening 2A, it is possible to adjust the nozzle inclination attitude by separating or bringing both contact portions apart. Since the ceiling opening 2A can be easily post-processed from outside the chamber 2, the nozzle inclination posture can be easily adjusted. In particular, if the ceiling opening 2A and the guide hole 2B are formed by the upper lid 9 as shown in FIG. 8, the nozzle inclination is changed after the upper lid 9 having various opening diameters and guide hole shapes is exchanged. The posture can be easily adjusted.

Further, since the contact occurs at the small-diameter reduced diameter portion 7 at the tip of the nozzle, the peripheral speed of the nozzle rotation can be reduced by the small diameter of the contact portion. For this reason, even if the same portion is brought into contact due to imperfect rotation of the nozzle, the peripheral speed is low, so that wear of the contact portion T3 around the opening can be suppressed. Moreover, due to the lubricating action exhibited by the leakage cleaning water,
Wear of the contact portion T3 around the opening can be more effectively suppressed.

In the embodiment shown in FIG. 22, the contact point T
In addition to 1 and T3, the nozzle 4 also makes contact at the contact portion T2 at the edge of the lower end of the guide hole 2B. Therefore, in this aspect, since the inclined posture is defined at three places, the inclined posture can be more stably secured. In addition, since the number of contact points when taking the inclined posture increases, even when the supply of the washing water to the chamber 2 is at a high water supply pressure, the nozzle inclined posture is more reliably maintained, and a stable conical shape is obtained. Of washing water and accurate spraying of washing water to a desired range can be achieved.

Here, a description will be given of a modification of the above-described method of taking the inclined posture. FIG. 23 is an explanatory diagram for explaining another method for setting the nozzle 4 to the inclined posture, and FIG. 24 is an explanatory diagram for explaining a modified example of this method.

As shown in FIG. 23, when the nozzle 4 makes contact at the contact points T1 to T3 described above, the contact point T2 is a nozzle lower end opening and a convex portion 45. Even in this case, the nozzle inclination posture can be stabilized, and the above-described effects can be obtained. Further, as shown in FIG. 24, a bottomed hole 4D is provided at the lower end of the nozzle, and the contact point T2 is
The bottomed hole 4D and the convex portion 45 may be used. In this case, the flow path 19 may be vertical and horizontal flow path portions 19A and 19B.

Note that the method shown in FIGS. 23 and 24 can also be performed as follows. That is, the nozzle 4 can be brought into contact with two points, the contact point T1 of the ceiling wall 2D and the contact point T2 of the convex part 45, and the nozzle inclined posture can be defined at these contact points.

Here, a description will be given of the point at which the above-described ascending position displacement of the nozzle 4 is caused in defining the nozzle inclination posture by the method shown in FIGS. FIG. 25 is an explanatory diagram illustrating a state in which the nozzle 4 is displaced in the ascending position with the supply of the washing water.

As shown, at time t0 before water supply,
The nozzle 4 is at the bottom of the chamber 2 by its own weight Mg.
Assuming that the supply of the cleaning water is started at time t1, the chamber 2 is filled with the cleaning water supplied at the water supply pressure P1. Nozzle 4 starts to rise by receiving the supply pressure P1 as upward force F _U. Such washing water supply at the same time (time t2), since the swirling flow as described above in the chamber 2 occurs, the nozzle 4 receives lift F _L and drag F _D based on the swirling flow as described previously inclined Start.

[0163] Incidentally, in such water situations, the nozzle 4 also receives a reaction force F _d by washing water jetting, but because upward force F _U based on the water supply pressure over this, there is no problem.
Further, the cleaning water leaks from the gap DN between the step end face 7A of the nozzle 4 and the ceiling wall 2D, and the cleaning water performs a lubricating action at the start of the nozzle revolution that starts thereafter.

[0164] Since the water supply of the washing water increases with time until the set flow rate, in the meantime, lift F _L · drag F _D with the increase rate increases. Therefore, the nozzle 4 further increases the inclination (time t3). Since such an inclination and the above-mentioned nozzle rise occur at the same time, the nozzle 4 eventually rises until it is restricted by the ceiling wall 2D, and the contact points T1,
The inclination posture is defined by T2 (time t4), and the orbit stably revolves in this inclination posture. The time t1 described above
Later, the nozzle 4 so start revolving receives lift F _L · drag F _D, also acts centrifugal force on the nozzle inclination. Therefore,
The nozzle 4 tilts quickly.

[0165] Thus, the nozzle 4 is a previous free state in which the increase in the ceiling wall 2D is restricted, receives a force (lift F _L-drag F _{D-centrifugal} force) resulting in tilting-revolution of the nozzle . Therefore, such a force can be more effectively applied to the nozzle 4
Therefore, it is possible to easily cause the nozzle to be inclined and revolve around the nozzle, and it is possible to enhance the startability of the revolution in the inclined posture. In addition, the lubrication effect of the washing water in the gap DN from the beginning of the water supply further enhances the startability.

[0166] In the nozzle stepped end surface 7A in the ceiling wall 2D is in contact, because it causes the left nozzle inclination in this state, power to bring the inclination-revolution of the nozzle (lift F _L-drag F _{D-centrifugal} force) Loss occurs in the transmission of data. Therefore, in such a case, although the startability is inferior to that in which the ascending position of the nozzle is displaced as described above, there is no particular problem in practical use.

Next, the manner of nozzle contact on the ceiling wall 2D of the chamber 2 will be described. FIG. 26 is an enlarged view showing a main part of a modified example of a contact state between the ceiling wall 2D of the chamber 2 and the step end surface 7A of the nozzle 4, and FIG. 26A shows a nozzle stationary state. 26
(B) is an explanatory view showing a nozzle inclined state.

As shown, the chamber 2 has an annular ridge 2E on the ceiling wall 2D. The annular protuberance 2E protrudes toward the chamber following the opening wall of the ceiling opening 2A, and abuts the step end surface 7A of the nozzle 4. Chamber 2
When the washing water is supplied to the nozzle 4 and the nozzle 4 is displaced and tilted as described above, the nozzle 4 comes into contact with the annular ridge 2E at one point (the contact point T1) of the annular ridge 2E. In addition, this contact point T1 changes around the ceiling opening with the revolution of the nozzle.

Therefore, the nozzle 4 comes into contact with the annular protrusion 2E.
Therefore, it is possible to stabilize the point contact state associated with the contact at the contact point T1, and it is useful for preventing wear of the step end face 7A and the annular ridge 2E. In addition, even if abrasion occurs, as long as the abrasion portion remains at the annular ridge 2E, the annular ridge 2E in the shape after abrasion causes the nozzle 4 to make a point contact (contact) in a stable state.
This is useful for stabilizing the nozzle inclination posture.

In this case, if the step end face 7A has a spherical shape or a tapered shape as described above, it is more beneficial to stabilize point contact due to the contact with the annular ridge 2E and to prevent the above-described wear.

Further, the nozzle contact on the ceiling wall 2D of the chamber 2 can be modified as follows. FIG.
FIG. 7 is an explanatory view illustrating a modification of the state where the ceiling wall 2D of the chamber 2 and the nozzle 4 are in contact with each other.

As shown in the drawing, the nozzle 4 has a thrust bearing 7C at the base of the reduced diameter portion 7, and the bearing is used to make contact with the annular ridge 2E. In this case, nozzle 4
And the rotation efficiency of the annular protrusion 2E can be increased, and the wear of the annular ridge 2E can be more effectively prevented. In this case, the upper plate of the thrust bearing 7C is more preferably tapered as shown in the figure, and may be spherical. The nozzle 4 is not limited to the one having the annular ridge 2E, but may be incorporated in the chamber 2 having the ceiling wall 2D without the ridge.

Next, another embodiment will be described. In this embodiment, the cleaning water ejection accompanying the above-mentioned nozzle revolution is applied to a device other than the human body local cleaning device. FIG. 28 shows a shower device 291 to which the cleaning water jetting accompanying the nozzle revolution is applied.
28A is a cross-sectional view of the shower device 291 in a lateral direction, and FIG. 28B is a cross-sectional view of the shower device 291 in FIG. is there. FIG. 29 is an explanatory diagram for explaining a state in which the washing water from the shower device 291 is discharged.

As shown in FIG. 28 (a), the shower device 291 includes a water passage 296 and a buffer chamber inflow passage 295 having a smaller passage area than the water passage 296. (Ie, at a high flow rate). A plurality of chambers 294 are provided in the buffer chamber 298. Each of the chambers 294 is surrounded by a swivel guide 294a reaching the head cover 299, and the guide guides washing water into the chamber 294 from the opening thereof along the guide inner wall. Therefore, the chamber 294 generates a swirling flow inside the chamber 294, and is exactly the same as the chamber 2 in the above-described embodiment and modified example in the function (swirl flow generation).

The head cover 299 has a ceiling opening 299A.
, And each ceiling opening 299A is located substantially at the center of the bottom surface of the chamber 294. Note that, even in the ceiling opening 299A, the outside thereof is in a depressed shape like the ceiling opening 2A.

Each of the chambers 294 has the structure shown in FIG.
The nozzle 4 as shown in FIG. The nozzle 4 makes the washing water jet 5 face the outside from the ceiling opening 299A. The nozzle 4 adopts the above-described inclined posture in a state where the step end surface 7A is in contact with the back wall of the head cover around the ceiling opening 299A and the lower end of the nozzle sidewall is in contact with the inner wall of the swivel guide 294a. The nozzle 4 has the vertical and horizontal flow paths 19 as described above, and guides the cleaning water in the chamber 294 to the cleaning water outlet 5 at the tip of the nozzle through the flow path and jets the cleaning water. Although the nozzle 4 having the vertical and horizontal flow paths 19 shown in FIG. 8 is drawn in FIG. 28, the nozzle 4 may have the nozzle-penetrating flow path 19 as shown in FIG.

Accordingly, when the washing water flows from the buffer chamber inflow passage 295 into the buffer chamber 298 and the washing water flows into the respective chambers 294, the washing water flows along the inner peripheral wall of the chamber 294. A swirling flow around the nozzle 4 is caused. As a result, the lift acts on the nozzle 4 as described above, and the nozzle 4
Revolves around the central axis of A.

The shower apparatus 291 having such a configuration
In this case, since the nozzles 4 revolve in the respective chambers 294, the cleaning water spouted from the nozzles 4 is revolved and spouted as described in FIG.
The water discharge as the whole shower device 291 is shown in FIG.
As shown in FIG. 9, the revolving jets from the respective nozzles 4 are collected, and the cleaning water jetted from the respective nozzles 4 are revolving jets independent of each other.

Therefore, the same effect (wide-area ejection, miniaturization, etc.) as in the above-described embodiment and its modified example can also be obtained by the shower device 291. In particular, since the shower device is used for a relatively long time for washing hair and the like, in the present embodiment, the water saving effect is enhanced through the jetting of the water at a low water supply amount.

The revolution frequency of the nozzle 4 in each chamber 294 can be set to about 3 Hz or more by adjusting the flow velocity as described above. In this way, the revolving jet from each nozzle 4 gives a feeling as if the spout is evenly applied as described above,
Since such revolving jets are gathered, the shower water as a whole is given a feeling of being uniformly hit.

The nozzle revolution frequency was increased to 40
When the frequency is set to Hz or more, it is possible to eliminate an unpleasant sensation at the time of washing even when a portion of the human body where the skin sensation is sensitive or a cut or abraded portion is washed. If this frequency is further increased, the feeling of water discharge received by the human body becomes closer to the sensation that the water is uniformly discharged over the entire area of the landing. If the nozzle revolution frequency is about 160 Hz, only the feeling that the water is uniformly sprayed over the entire landing area can be obtained.

As the nozzle revolution frequency is increased in this manner, the centrifugal force and the air shear applied to the jetted cleaning water increase, and the jetted cleaning water is dispersed or scattered. Therefore, when it is desired to limit the dispersion and splashing of the jet cleaning water, the nozzle revolution frequency may be set to about 160 Hz or less.

In the above-described shower device 291, the respective nozzles 4 are brought into contact with the head cover 299.
However, it is not limited to this. For example, a plurality of chambers 294 may be directly formed in the shower device 291 without providing the buffer chamber 298, and the cleaning water may be branched and flow into each chamber. Further, the nozzles 4 to be incorporated in the respective chambers 294 may be nozzles having no large-diameter portion 4A and having only the large-diameter portion 4A as shown in FIGS. In this case, since the nozzle does not fly out of the head cover 299, even when the shower device 291 is brought close to the cleaning location, the nozzle does not touch the cleaning location. For this reason, a situation where the nozzle revolution is stopped from the outside does not occur, and there is no hindrance to the ejection of the washing water. Therefore, there is no uncomfortable feeling when the shower is flying.

Next, another example of orbital ejection of the cleaning water accompanying the nozzle revolution will be described. FIG. 30 is a schematic perspective view of a portable human body local cleaning apparatus 300 to which revolving jets accompanying nozzle revolutions are applied.

As shown in FIG.
No. 00 has a tank 301 and a nozzle arm 302 that can move forward and backward with respect to the tank. Nozzle arm 3
02 is configured such that when the washing water in the tank 301 is pushed out by the pump gripping the tank or the dry battery, the washing water is advanced to a predetermined position by receiving the water pressure, and thereafter, the washing water is jetted. I have.

The nozzle arm 302 has a chamber (not shown) and the above-mentioned nozzle 4 on the nozzle tip side.
The nozzle 4 is provided in the chamber so as to be able to revolve in the inclined posture as described above. Then, the cleaning water is supplied to the chamber to generate a swirling flow, and the revolving jet of the cleaning water at the time of local cleaning is realized.

In the human body part cleaning apparatus 300, since the nozzle revolves and jets based on the swirling flow, the improvement of water saving efficiency as described above can eliminate the dissatisfaction that the washing water in the tank 301 runs out immediately. In addition, it is lightweight because it does not require an actuator etc., so it is suitable for carrying.
The cleaning power can be improved at the same time.

Next, another example of revolving jet of cleaning water will be described. FIG. 31 is a schematic perspective view of a dishwashing apparatus 310 to which revolving jets of washing water accompanying nozzle revolutions are applied, and FIG. 32 is an explanatory view for explaining a rotary washing arm 320 of the dishwashing apparatus 310.

As shown in FIG.
The apparatus is provided with upper and lower doors 311 and 312 on the front of the apparatus, and the cleaning chamber 313 is closed by these doors. The washing chamber 313 is provided with rotating washing arms 320 that rotate while ejecting washing water in two rows, upper and lower.

The rotary cleaning arm 320 is rotatably supported at the center thereof by a column 321, and has two nozzles 4 at both left and right sides of the column 321. The nozzle 4 includes the above-described chambers 2 and a water supply pipe (not shown) that supplies the cleaning water to each chamber 2 from a tangential direction to generate a swirling flow of the cleaning water. In this case, the chamber 2 and the nozzle 4 can be of various types described in the above-described embodiment or its modified example. For example, the chamber 2 and the nozzle 4 shown in FIGS. 8 to 13 or 18 to 27 can be used.

In the dishwashing apparatus 310, the nozzles 4 shown in FIG. 32 are arranged so that the direction of jetting of the washing water is obliquely directed. Was reversed. That is, the nozzle 4 on the left side in the figure ejects the washing water to the back side with respect to the paper surface, and the nozzle 4 on the right side ejects the cleaning water to the front side with respect to the paper surface. Therefore, when the cleaning water is jetted from the nozzles at the left and right ends of the rotary cleaning arm 320, the reaction force generated by the jetting of the cleaning water is applied to the rotary cleaning arm 320 in the same direction.

As described above, in order to make the direction of jetting of the washing water oblique, the central axis of the ceiling opening (not shown) in the chamber 2 may be formed obliquely in accordance with this direction.

In the dishwashing apparatus 310, the nozzles 4 on the left and right sides of the rotating washing arm revolve in a tilted attitude with the supply of the washing water, thereby realizing the ejection of the washing water as shown in FIG. I do.

[0194] Even in the dishwashing apparatus 310, since the nozzles 4 generate revolving jets, as described above, the water-saving efficiency is improved, and the washing ability (the ability to remove dirt on dishes) is improved. It is possible to extend the cleaning range (water landing range). In particular, due to the characteristic of dishwashing, an advantage that a high washing ability can be exhibited while using a small amount of washing water is preferable.

The nozzle 4 described above can be fixedly installed on the wall surface of the cleaning chamber 313 if necessary. For example,
Tea bowl steamed dishes, which are difficult to remove, are placed in the washing room 31.
The cleaning water is ejected from the nozzle 4 fixed to the wall surface (revolving jet) into the strong cleaning basket 3. By doing so, it is possible to suitably wash even bowls and dishes with a high washing ability. In such a nozzle fixed to the wall surface, the existing normal nozzle may be removed, and the above-described nozzle 4 and the chamber 2 may be incorporated and replaced. In this case, the existing dishwashing apparatus can be easily remodeled to one having excellent water saving and high washing ability.

The dishwasher 310 has the following advantages. When water is discharged from each nozzle 4 of the rotary cleaning arm 320 as described above, the rotary cleaning arm 320 is rotated by the water discharge reaction force. Therefore, the rotary cleaning arm 320
The washing water spouted from each nozzle 4 by the nozzle revolution can be poured onto the tableware while rotating. Therefore, the washing ability of the dishes can be further improved and the washing room 3
The washing water is spouted to all 13 corners to wash the dishes.

Further, as described above, in the rotary cleaning arm 320, the chamber 2 takes an oblique posture with respect to the rotary cleaning arm 320, and the nozzle 4 is incorporated in this chamber 2. Therefore, the nozzle 4 after being assembled is inclined in the chamber 2 during non-cleaning, and forms a narrow space around the nozzle between the outer wall surface of the nozzle and the inner wall surface of the chamber.

Accordingly, when the cleaning water is supplied to the chamber 2 from the tangential direction in this situation, the flow velocity of the swirling flow is increased in the above-mentioned narrow space. Therefore, the above-described flow velocity difference can be reliably generated around the nozzle 4. Therefore, the nozzle revolution based on the above-mentioned lift is surely caused,
The reliability of orbital ejection can be improved. Moreover, since the nozzle 4 is oblique to the chamber 2 from the beginning,
The collision of the swirling flow also occurs from the beginning of the inflow, and the nozzle 4 is pushed by the swirling flow. Therefore, the nozzle 4 quickly causes the nozzle revolution, and the revolution jet can be started from the beginning of the supply of the washing water.

In this case, the situation in which the chamber 2 and the nozzle 4 are relatively inclined before the start of the cleaning as described above can be easily realized by the above-described embodiment and its modified example. For example,
2, the nozzle arm 31 advances and retreats obliquely, so that the nozzle 4 in the cleaning water jetting device 40 at the tip of the arm is oblique to the chamber 2 and thus has the above-described advantage.

In the above-mentioned dishwashing apparatus 310, the rotary washing arm 320 is rotated by utilizing the spouting reaction force, but the present invention is not limited to this. For example, the rotary cleaning arm 320 may be rotated by a motor or the like, and the nozzle 4 may be disposed on the rotary cleaning arm 320 in an upward direction.

Alternatively, the nozzle 4 may be provided on the upper surface of the rotary cleaning arm 320 upward, and the nozzle 4 may be provided on the side surface of the rotary cleaning arm 320. In this way, the nozzle 4 on the side rotates the rotary cleaning arm 320 by the jet reaction force while cleaning the dishes on the side of the rotary cleaning arm 320. On the other hand, the nozzle 4 on the upper surface cleans the dishes above the rotating cleaning arm 320.

Next, another example of revolving jet of cleaning water will be described. FIG. 33 is an explanatory view illustrating a schematic configuration of a bathtub cleaning device 350 to which revolving jet of cleaning water accompanying nozzle revolution is applied.
FIG. 34 is an explanatory diagram illustrating how the guide hole 2B of the chamber 2 employed in the bathtub cleaning device 350 regulates the inclination of the nozzle 4.

As shown, the bath tub cleaning device 350
A plurality of chambers 2 are provided on the inner peripheral wall of the bathtub 352, and a detergent and washing water (tap water) are jetted from the nozzle 4 incorporated in the chamber toward the opposing inner peripheral wall of the bathtub.
The bathtub cleaning device 350 has a switching valve 358 that switches between the supply of cleaning water from a water pipe and the supply of detergent from a detergent tank 354 by a pump 356. The switching valve 358 controls the switching of water supply by the control device 360, and the bathtub cleaning operation including the water supply switching is performed according to an instruction from the remote controller 362. A check valve for preventing backflow is provided in each of the washing water supply pipe and the detergent supply pipe upstream of the switching valve 358.

As described with reference to FIG. 18, the chamber 2 of the present embodiment is provided with the contact point T1 of the ceiling wall 2D and the guide hole 2
The nozzle inclined posture is defined at the contact point T2 of B. Then, as shown in FIG.
Has an elliptical guide hole 2B for bringing the nozzle into contact at the contact point T2 in a horizontal section, and the elliptical guide hole 2B regulates the inclination of the nozzle 4. In other words, the nozzle 4 starts revolving due to the swirling flow in the chamber 2 described above, but revolves along the dashed-dotted line in the figure following the opening shape due to the contact with the guide hole 2B. For this reason, the bath tub cleaning device 350 makes the cleaning water jet from each nozzle 4 a flat cone. In this case, the flat direction is the horizontal direction on the inner peripheral wall of the bathtub, and the location where the nozzle 4 and the chamber 2 are disposed is near the normal water level of the inner peripheral wall of the bathtub.

[0205] When the bathtub cleaning operation is performed by the remote controller 362, the control device 360 receives the signal and switches the switching valve 358 to the detergent water supply.
6 is driven to supply detergent water. As a result, the inner peripheral wall of the bath tub receives the splash of detergent from the respective nozzles 4 around the inner peripheral wall of the bath tub in a range including the vicinity of the normal water level. When such detergent water supply is performed for a predetermined time, the control device 360
At the same time as the pump is stopped, the switching valve 358 is switched to washing water supply to supply washing water. Thereby, the inner peripheral wall of the bathtub is
The washing water is splashed from each nozzle 4 around the inner peripheral wall of the bathtub in a range including the vicinity of the normal water level. Then, the control device 360 alternately repeats such detergent flying and washing water flying, and carefully supplies washing water at the last stage, thereby completing the cleaning operation of the inner peripheral wall of the bathtub.

Therefore, the bath tub cleaning device 350 of this embodiment
According to the method, the washing water and the detergent are made to splash on the inner peripheral wall of the bathtub near the normal water level where the dirt is remarkably adhered, so that the bathtub can be suitably cleaned. In addition, in cleaning the bath tub, the nozzle 4 for jetting the cleaning water accompanying the nozzle revolution.
The above effects (improved water saving, improved cleaning ability, etc.) can be exhibited.

The embodiments of the present invention have been described above.
The present invention is not limited to the above-described examples and embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention. For example, the numerical values given in the embodiments and the modified examples are merely examples, and the present invention is not limited to these exemplary numerical values. Further, the nozzle 4 that revolves in the above-described inclined posture is provided with the washing water jet 5 and the flow path 1 that are inclined with respect to the nozzle center axis as shown in FIG.
9 can be provided. In this case, the cleaning water spouting in a conical shape along with the revolution of the nozzle causes a conical spouting in the peripheral wall of the cone as the nozzle further rotates. Therefore,
It is possible to discharge the washing water to a wider area.

Further, the present invention is not limited to the above-described cleaning water jetting device.
The present invention can also be applied to a fluid ejection device used for another purpose, such as a fountain. Further, the fluid is not limited to water.

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a configuration conventionally employed to rotationally drive a nozzle at a cleaning water pressure.

FIG. 2 shows a cleaning water jetting device 40 according to an embodiment of the present invention.
It is a schematic perspective view which shows the external appearance of the toilet 30 which has.

FIG. 3 is a schematic exploded perspective view for explaining a configuration of a cleaning water jetting device 40.

FIG. 4 is a schematic cross-sectional view in the vertical direction of the cleaning water jetting device 40.

FIG. 5 is a schematic cross-sectional view in the horizontal direction of the cleaning water jetting device 40.

FIG. 6 is a schematic vertical sectional view of a cleaning water jetting device 40 according to a modification.

FIG. 7 is a schematic cross-sectional view in the horizontal direction of a cleaning water jetting device 40 of this modified example.

FIG. 8 is an explanatory diagram showing a schematic vertical cross section of a cleaning water jetting device 40 of another embodiment and an enlarged view of a main part thereof.

FIG. 9 is a schematic horizontal sectional view of the cleaning water jetting device 40.

FIG. 10 is an explanatory diagram showing a schematic vertical cross section of a cleaning water jetting device 40 according to a modified example and an enlarged main part thereof.

FIG. 11 is a schematic cross-sectional view in the horizontal direction of a cleaning water jetting device 40 according to this modification.

FIG. 12 is an explanatory diagram showing a schematic vertical cross section of a cleaning water jetting device 40 of another modified example and an enlarged main part thereof.

FIG. 13 is a schematic cross-sectional view in the horizontal direction of a cleaning water jetting device 40 according to this modification.

FIG. 14 is an explanatory diagram illustrating the behavior of the nozzle 4 after the cleaning water flows into the chamber 2 and the state of the force applied to the nozzle 4 over time.

15 is an explanatory diagram illustrating a state of jetting of cleaning water obtained by the nozzle 4 taking the behavior shown in FIG.

16A and 16B are explanatory diagrams illustrating the relationship between the revolution of the nozzle 4 and the rotation. FIG. 16A is an explanatory diagram illustrating a case where the revolution and the rotation of the nozzle 4 have the same rotation direction, and FIG. FIG. 4 is an explanatory diagram showing a case where the rotation direction of the revolution and the rotation of the nozzle 4 are opposite.

FIG. 17 is an explanatory diagram illustrating a state of jetting of cleaning water when the nozzle 4 adopts the behavior of FIG. 16; FIG. 17A shows a state of jetting of cleaning water when the nozzle revolution and rotation are in the same direction; FIG. 17 (b) is an explanatory diagram for explaining a state of jetting of the washing water when the nozzle revolution and the rotation are in the opposite directions.

FIG. 18 is an explanatory diagram for explaining a first method when the nozzle 4 is set to an inclined posture.

FIG. 19 is an explanatory diagram for explaining another mode in a case where a first method for defining a nozzle inclination posture is employed.

FIG. 20 is an explanatory diagram illustrating still another mode of the first technique.

FIG. 21 is an explanatory diagram for explaining a second technique when the nozzle 4 is set to an inclined posture.

FIG. 22 is an explanatory diagram for explaining a third method when the nozzle 4 is set in the inclined posture.

FIG. 23 is an explanatory diagram illustrating another method of setting the nozzle 4 to an inclined posture.

FIG. 24 is an explanatory diagram illustrating a modified example of this method.

FIG. 25 is an explanatory diagram illustrating a state in which the nozzle 4 is displaced to an ascending position due to the supply of cleaning water.

FIG. 26 is an enlarged view of a main part of a ceiling wall 2D of the chamber 2 and a stepped end surface 7A of the nozzle 4 for explaining a modified example of a contact state thereof. FIG. FIG. 26 (b) is an explanatory diagram showing a nozzle inclined state.

FIG. 27 is an explanatory diagram illustrating a modified example of a contact state between the ceiling wall 2D of the chamber 2 and the nozzle 4.

FIG. 28 is an explanatory diagram for explaining a shower device 291 to which cleaning water is ejected in association with nozzle revolution, and FIG.
28 is a cross-sectional view of the shower device 291 in a lateral direction, and FIG. 28B is a cross-sectional view of the shower device 291 in FIG.

FIG. 29 is an explanatory diagram illustrating a state in which the washing water from the shower device 291 is discharged.

FIG. 30 is a schematic perspective view of a portable human body local cleaning apparatus 300 to which revolving jets accompanying nozzle revolutions are applied.

FIG. 31 is a schematic perspective view of a dishwashing apparatus 310 to which revolving jets of cleaning water accompanying nozzle revolutions are applied.

FIG. 32 is an explanatory diagram for explaining a rotary cleaning arm 320 included in the dishwashing device 310.

FIG. 33 is an explanatory diagram illustrating a schematic configuration of a bathtub cleaning device 350 to which revolving jet of cleaning water accompanying nozzle revolution is applied.

FIG. 34 is an explanatory diagram for explaining how the guide hole 2B of the chamber 2 employed in the bathtub cleaning apparatus 350 regulates the inclination of the nozzle 4;

[Description of Signs] 2 ... Chamber 2A ... Ceiling opening 2B ... Guide hole 2C ... Bottom hole 2D ... Ceiling wall 2E ... Annular protuberance 2a ... Peripheral wall part 2b ... Peripheral wall part 4 ... Nozzle 4A ... Large diameter part 4B ... Tip part 4D: Bottomed hole 5: Cleaning water spout 6A: Upper through hole 6B: Lower through hole 7: Reduced diameter portion 7A: Step end face 7C: Thrust bearing 8: Square block 9: Upper lid 10: Lower lid 11: Projection 12 ... female screw hole 13 ... communication hole 15 ... blade 19 ... flow path 19A ... flow path part 19B ... flow path part 30 ... toilet bowl 31 ... nozzle arm 40 ... washing water jetting device 41 ... recess 42 ... washing water inflow 43 ... recess 44 ... Lower end part 45 ... Convex part 50 ... Water supply hose 291 ... Shower device 294 ... Chamber 294a ... Swivel guide 295 ... Buffer chamber inflow passage 296 ... Water passage 298 ... Buffer room 299 ... F Cover 299A: Ceiling opening 300: Human body local cleaning device 301: Tank 302: Nozzle arm 310: Dishwashing device 320: Rotating cleaning arm 311: Door 313: Cleaning room 321 ... Prop 350: Bathtub cleaning device 352: Bathtub 354: Detergent tank 356 pump 358 switching valve 360 control device 362 remote control O nozzle axis P opening center axis T1 to T3

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuo Hamada 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Tochiki Kiki Co., Ltd. (72) Inventor Makoto Hatakeyama 2 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka No. 1-1, Totoki Kiki Co., Ltd. (72) Inventor Noriyuki Kiyo 130-3 Nonaka, Kitayama, Kashiwara-cho, Hikami-gun, Hyogo F-term in Kyoritsu Alloy Mfg. Co., Ltd. 2D032 FA04 2D038 JA07 4F033 PA01 PA02 PB03 PB04 PB25 PC02

Claims (21)

[Claims] 1. A fluid ejection device, comprising: a chamber for receiving a fluid, wherein the fluid ejection device ejects the received fluid from a fluid ejection port, wherein the nozzle is incorporated in the chamber, and the fluid ejection port is provided at a nozzle tip side. The nozzle having a pipe in a nozzle for guiding a fluid received in the chamber to the fluid ejection port, and a reduced-diameter portion on the nozzle tip side formed in the nozzle is rotated in an opening formed in the chamber. Freely and in a state where the position of the nozzle is allowed to change in the axial direction of the nozzle, and the direction of the fluid ejection port is set to be inclined with respect to the axial center; When the nozzle is supplied to the nozzle, the position of the nozzle is changed toward the outer side of the nozzle tip by the fluid pressure, and the end face of the nozzle portion having a diameter larger than the diameter-reduced portion is shifted toward the opening side. A fluid jetting device configured to jet fluid from the fluid jet while the nozzle is rotated around the axis by the fluid pressure in the abutting state. 2. The fluid ejection device according to claim 1, wherein a blade that receives a fluid pressure is provided around a periphery of the nozzle.
Fluid ejection device. 3. A fluid ejection device comprising a chamber for receiving a fluid, wherein the fluid ejection device ejects the received fluid from a fluid ejection port, wherein the nozzle is incorporated in the chamber, and the fluid ejection port is provided at a nozzle tip side. The nozzle having a nozzle internal conduit for guiding the fluid received in the chamber to the fluid ejection port, and a reduced-diameter portion on the nozzle tip side formed in the nozzle is rotated in an opening formed in the chamber. Arranged freely and in a state where the position of the nozzle in the axial direction of the nozzle is allowed to change, and the nozzle can revolve around the central axis in a posture inclined with respect to the central axis of the opening. When the fluid is supplied to the chamber, the position of the nozzle is changed toward the outside of the nozzle tip by the fluid pressure, and the nozzle having a diameter larger than that of the reduced diameter portion is changed. The end surface of the nozzle portion abuts against the chamber ceiling wall on the opening side, and in the abutting state, the nozzle rotates around the axis by fluid pressure, and the nozzle rotates around the center axis in a posture inclined with respect to the center axis. A fluid ejection device configured to eject fluid from the fluid ejection port while revolving around. 4. The fluid ejection device according to claim 3, wherein a guide for guiding the nozzle is provided so that the nozzle revolves around the central axis in a posture inclined with respect to the central axis of the opening. A fluid ejection device provided in the chamber. 5. The fluid ejection device according to claim 1, wherein at least one of the chamber ceiling wall and an end face of a nozzle portion having a diameter larger than the reduced diameter portion is formed into a spherical surface. Fluid ejection device. 6. An apparatus for ejecting a fluid from a fluid ejection port, comprising: a chamber receiving a supply of fluid; and a nozzle incorporated in the chamber, wherein the nozzle has the fluid ejection port on a nozzle tip side, A nozzle having a pipe in a nozzle that guides a fluid received in the chamber to the fluid outlet, the nozzle having the fluid outlet facing the outside of a ceiling opening formed in the chamber, and the ceiling opening. Abutting on one side of the chamber ceiling wall and abutting on at least one other location to take a posture inclined with respect to the central axis of the ceiling opening, and revolves around the central axis in the inclined posture. When the fluid is supplied to the chamber as possible, while revolving around the central axis in a state of taking the inclined posture by the fluid pressure of the supplied fluid, Fluid ejection apparatus characterized by through the serial nozzle pipe for ejecting fluid from the fluid ejection opening. 7. The fluid ejection device according to claim 6, wherein the nozzle causes the another one of the contact points to come into contact with a chamber side wall around the nozzle, and causes the chamber side wall contact point to be in contact with the chamber side wall contact point. A fluid ejection device, which adopts the above-mentioned inclined posture at two contact points of a chamber ceiling wall. 8. The fluid ejection device according to claim 7, wherein the nozzle includes: a nozzle tip having a diameter smaller than the ceiling opening; and a nozzle body having a diameter larger than the ceiling opening and following the nozzle tip. Having the nozzle tip protruding outside from the ceiling opening so that the fluid ejection port faces the outside of the ceiling opening, and the stepped portion of the nozzle tip and the nozzle body abuts on the chamber ceiling wall, A fluid ejection device, wherein the nozzle main body is brought into contact with the chamber side wall to take the inclined posture. 9. The fluid ejection device according to claim 6, wherein the nozzle includes: a nozzle tip having a diameter smaller than the ceiling opening; and a nozzle body having a diameter larger than the ceiling opening and following the nozzle tip. Having the tip of the nozzle protruding outside from the ceiling opening to expose the fluid ejection port to the outside of the ceiling opening, and causing the another point of contact to come into contact with the opening wall of the ceiling opening. Taking the inclined posture at two points, a contact point of the ceiling opening wall and a contact point of the chamber ceiling wall, causing the nozzle tip to contact the ceiling opening wall, and A fluid ejection device, wherein a step portion is in contact with the ceiling wall of the chamber. 10. The fluid ejection device according to claim 9, wherein the nozzle is configured to contact the nozzle body with the chamber side wall in addition to contact with the ceiling opening wall and the chamber ceiling wall. A fluid ejecting device that is brought into contact with the container and adopts the inclined posture. 11. The fluid ejection device according to claim 6, wherein the nozzle receives fluid pressure accompanying fluid supply to the chamber, moves to the ceiling opening side, and Fluid ejection device that abuts the chamber ceiling wall. 12. The fluid ejection device according to claim 6, wherein the chamber ceiling wall has a portion in contact with the nozzle protruding in an annular shape. 13. The fluid ejection device according to claim 6, wherein the nozzle has a contact portion with the chamber ceiling wall.
A fluid ejection device having one of a spherical shape and a tapered shape. 14. The fluid ejection device according to claim 6, wherein the nozzle has the nozzle inner pipe penetrating in a nozzle axis direction. 15. The fluid jetting device according to claim 14, wherein the nozzle has a large-diameter pipe on the side opposite to the fluid jetting port in the nozzle. 16. The fluid ejection device according to claim 6, wherein at least one of the chamber ceiling wall and a contact portion of the nozzle with the chamber ceiling wall is formed of a metal material. Fluid ejection device. 17. A human body local cleaning device for discharging supplied cleaning water toward a human body local part, wherein the nozzle arm is located at a cleaning position for local cleaning, and the nozzle arm according to any one of claims 1 to 16. A human body cleaning device, comprising: a fluid ejection device; wherein the fluid ejection device is incorporated in the nozzle arm so as to discharge cleaning water from the nozzle toward the human body portion. 18. A shower device for discharging supplied washing water toward a human body, wherein the fluid jetting device according to any one of claims 1 to 16 discharges the washing water from the nozzle toward a human body. Shower device built into shower head to discharge water. 19. A cleaning device for discharging supplied cleaning water toward an article to be cleaned, comprising: the fluid ejection device according to claim 1; A cleaning device that discharges cleaning water toward articles. 20. The cleaning apparatus according to claim 19, wherein the fluid ejection device has the nozzle directed to a cleaning chamber in which the article to be cleaned is stored. 21. The cleaning apparatus according to claim 20, further comprising: a rotation arm disposed in the cleaning chamber and rotatable around a rotation axis, wherein the rotation arm is provided at an arm end portion with the rotation shaft. And a water supply passage for supplying cleaning water to the chamber of each of the fluid jetting devices. Each of the fluid jetting devices is provided with a countermeasure generated by the cleaning water jetting. A cleaning device for discharging cleaning water from the nozzle in an oblique direction with respect to the rotating arm so that a force causes the rotating arm to rotate in the same direction around the rotation axis.