JP5532807B2 - Sanitary washing device - Google Patents

Description

  Aspects of the present invention generally relate to a sanitary washing apparatus, and more specifically, to a sanitary washing apparatus that uses water to wash a human body part such as a “buttock” of a user sitting on a Western-style sitting toilet or a female part.

  As a technique for expanding the washing range (washing area at the time of landing) without moving the local washing nozzle, there is a human body washing device and a water discharging device that can discharge the washing water swirled in a spiral shape from the nozzle hole. (Patent Documents 1 and 5). The technique of performing spiral swirling water discharge (hollow conical water discharging) is a useful technique that can adjust the cleaning range depending on the degree of swirling. However, when water is discharged in a hollow cone shape, a hollow portion inside the hollow cone shape, that is, a hollow portion is generated at the time of landing, so there is room for improvement in cleaning performance in the hollow portion. That is, for example, during menstruation, menstrual blood stains adhere to a wide area around the female local area, and therefore further improvement is required to meet the desire to clean a wide area at once. .

  On the other hand, there is a sanitary washing device that can obtain a strong washing feeling in a straight flow while securing a wide washing area by the swirl jet by further discharging water in a hollow portion inside the swirl jet (patent) Reference 2). However, in the sanitary washing device described in Patent Document 2, since the straight flow is further discharged into the hollow portion inside the swirling jet, a hollow portion is generated between the swirling jet and the straight flow. Therefore, the entire area to be cleaned, such as a wide area around the female local area, cannot be cleaned at the same time.

  Further, there is a local cleaning device that can change the cleaning area of the spray pattern by changing the interference state between the axial jet flow and the tangential jet flow (Patent Document 3). Or there exists a local washing | cleaning apparatus which sprays mist toward the local part of a human body and performs local washing | cleaning by mist (patent document 4). However, since the local cleaning devices described in Patent Documents 3 and 4 spray the cleaning water in a mist-like conical shape or spray mist, the cleaning water drifts in the air and performs the desired cleaning. There is a risk of splashing outside the area. Then, the scattered washing water adheres to the thigh of the user seated on the toilet seat and the user may feel uncomfortable.

That is, even if the water discharge form that has been proposed in the past is applied to bidet washing, the female local area and the surrounding area cannot be washed at the same time, or the washing water is applied to the user's thigh that is seated on the toilet seat. There is room for improvement in terms of dispersion.
Moreover, although the case where the female part was washed was described, there is a similar problem when washing the “buttock”. For example, depending on the state of the stool, there is a desire to quickly wash a wide area so that water does not splash on the thigh.

JP 2001-90155 A JP 2007-100300 A JP 2001-90154 A JP 2006-274603 A JP 2003-247260 A

  The present invention has been made on the basis of recognition of such a problem, and a sanitary washing device capable of landing washing water directly and uniformly over a wide range of human body parts while suppressing scattering of washing water. The purpose is to provide.

A first aspect of the present invention is a sanitary washing device that discharges washing water into a predetermined area from a water discharge hole of a nozzle, and lands the washing water on a human body local area, in the predetermined area, By filling the hollow portion of the wash water discharged into a hollow cone with a stream of water that has been crushed and granulated after being discharged from the water discharge hole, the wash water is uniformly distributed inside the region. The water discharge means for spreading the water on the human body local area, and at the outer peripheral edge of the predetermined region, water is discharged from the water discharge hole so as to diffuse into the hollow conical shape, whereby the cleaning is performed to the outside of the region. forming a water discharge critical areas to prevent water from scattering, that and a water discharge critical region forming means for jetting the cleaning water to maintain the water discharge critical region to be landing on the human private Characteristic sanitary washing device A.

  According to this sanitary washing device, the washing water is discharged into a predetermined region from the water discharge hole of the nozzle. And in the predetermined area | region, the washing water is diffused and the washing water spreads uniformly inside the area.

  Moreover, the sanitary washing device of the present invention includes water discharge critical region forming means. The water discharge critical zone forming means is configured to maintain a water discharge critical zone that prevents the wash water from splashing outside the region at the outer peripheral edge of the predetermined region until the water reaches the human body local area. Water is discharged.

  In the case of washing the female local area, the washing water is discharged so that it diffuses into a predetermined area from the water discharge hole, and uniformly reaches the wide area around the female local area. The washing pressure at the section is lower than that of the conventional bidet washing, and there is little possibility that strong stimulation is applied to the delicate area of the woman more than necessary. Therefore, the sanitary washing device of the present invention has a problem of giving unpleasant feelings such as a strong irritation or a feeling of being traced to the center more than necessary in washing a delicate area of a woman, that is, washing a wide range at once. Therefore, it is possible to solve the problem of the cleaning feeling required for bidet cleaning, and to realize a bidet cleaning with a very comfortable cleaning feeling.

Further, the sanitary washing device of the present invention can wash a wider area at a time than the conventional bidet washing at a time, so that the water landing position can be moved by moving the nozzle in the front-rear direction and the left-right direction, and the toilet seat It is not necessary for the user sitting on the floor to move the landing position by moving the sitting position. Therefore, the sanitary washing device of the present invention is less likely to give a feeling as if it was traced in a female delicate area. Also by this, the sanitary washing device of the present invention can realize a bidet washing with a very comfortable washing feeling.
In addition, when washing “wet”, it is possible to quickly wash a wide area without giving a strong irritation or a feeling of being traced to the center part. More comfortable local cleaning can be realized for humans or when diarrhea occurs.

Further, the water discharge critical area forming means of the present invention is configured so that the wash water discharged from the water discharge hole reaches the wide area around the human body local area, and the outer periphery of the predetermined area is outward from the area. Maintain a critical water discharge range that prevents the wash water from splashing. Therefore, it is possible to prevent the cleaning water discharged so as to diffuse into the region from landing outside the cleaning area, and a portion outside the desired cleaning area (for example, the thigh) is wetted unnecessarily. Can be suppressed. Thereby, it can suppress that the user who sat down on the toilet seat feels discomfort because the part outside the desired washing area gets wet unnecessarily.
In addition, according to this sanitary washing device, the hollow conical water discharge is filled with a stream of washing water granulated, so that the water landing force at the center of the washing area is lower than the conventional bidet washing, There is less risk that a strong stimulus will be applied to the delicate area more than necessary. Therefore, the bidet washing can be reliably performed with the water landing force of the central portion being smaller than the water landing force of the outer peripheral portion, evenly landing on the wide area of the female local area.

Further, in the second invention, in the first invention, the landing force when the washing water that forms the water discharge critical region lands is more than the landing force when the washing water in the central portion of the region lands. It is also a sanitary washing device characterized by being large or identical.
Here, the “water landing force” is the momentum of the cleaning water per unit area, and refers to the force that removes, peels off, or floats.

  According to this sanitary washing device, water does not land more strongly than necessary at the center of the human body part. For this reason, when washing the female local area, the delicate area of the female local area does not land more strongly than necessary, so that strong stimulation is not applied to the delicate area and a very comfortable bidet washing can be realized.

The outer peripheral portion of the desired cleaning area of the female local area is an area that is desired to be actively cleaned when menstrual blood stains are attached to the woman. Therefore, when the water landing force at the outer peripheral portion is the same as or higher than the water landing force at the central portion, the cleaning water with high cleaning power reaches the area where menstrual blood stains are to be removed. Therefore, the sanitary washing device of the present invention can remove or lift menstrual stains in a shorter time. Therefore, the sanitary washing device of the present invention can meet the desire to wash a wide range at once, and is suitable as a device used by women during menstruation.
In addition, in the case of “wet” cleaning, particularly for a person with a saddle, since it does not dip strongly into the anus, comfortable cleaning can be realized and convenient.

  In addition, according to a third aspect of the present invention, in the first or second aspect, the wash water that uniformly spreads inside the region is granular, and the wash water that forms the water discharge critical region is inside the region. It is a sanitary washing apparatus characterized by being granular having a diameter larger than that of washing water that can be widely distributed.

According to this sanitary washing device, since the washing water that lands on the human body part is granular, washing with a soft feeling can be performed, and the feeling of comfort during washing is further increased.
In particular, since the wash water that reaches the center of the female local area is smaller in size than the wash water that forms the critical discharge area, the water landing force at the central area can be reduced, which is necessary for the delicate area of the female local area. A large area can be washed at a time without applying any stimulation.

In addition, the wash water that forms the critical water discharge area is granular with a larger diameter than the wash water that spreads uniformly inside the area where the wash water is diffused, so that the menstrual blood stains during menstruation are large. It can be washed away with granular washing water, and better detergency can be obtained.
Also, in the case of “wet” washing, dirt around the anus can be washed away with large granular washing water, and a better washing power can be obtained. In particular, it is convenient for a person with a saddle because it does not spill strongly on the anus.

  Furthermore, water droplets with a small diameter inside the region where the washing water diffuses are likely to drift in the air, but since the water particles with a large diameter form a critical region, the particles with a small diameter exceed the critical region, There is no risk of splashing outside the desired cleaning area.

  According to the aspect of the present invention, the sanitary washing that can prevent the washing water from adhering to the thighs or the like by suppressing the dispersion of the washing water and can directly and uniformly land the washing water over a wide area of the human body part. An apparatus is provided.

It is a perspective schematic diagram showing the toilet apparatus provided with the sanitary washing apparatus concerning embodiment of this invention. It is a conceptual schematic diagram which illustrates the discharge form of the wash water discharged from the nozzle of this embodiment. It is a conceptual schematic diagram which illustrates the other water discharge form of the wash water discharged from the nozzle of this embodiment. It is a conceptual schematic diagram which illustrates further another water discharge form of the wash water discharged from the nozzle of this embodiment. It is a graph showing the landing pressure and the amount of landing water in the washing water landing part. It is a graph showing the other landing pressure and the amount of landing water in the washing water landing part. It is a graph showing the further another landing pressure and the amount of landing water in the washing water landing part. It is a cross-sectional schematic diagram showing the nozzle concerning the specific example of this embodiment. It is a cross-sectional schematic diagram showing the nozzle concerning the other specific example of this embodiment. It is a cross-sectional schematic diagram showing the nozzle concerning a comparative example. It is a cross-sectional schematic diagram which illustrates the modification of a throat. It is a cross-sectional schematic diagram showing the nozzle concerning the other specific example of this embodiment. It is a cross-sectional schematic diagram showing the nozzle concerning the other specific example of this embodiment. It is a cross-sectional schematic diagram which illustrates the internal structure of the pressure modulation apparatus of this example. It is a cross-sectional schematic diagram which illustrates the other internal structure of the pressure modulation apparatus of this example. It is a perspective schematic diagram showing the nozzle concerning the modification of this embodiment. It is the upper surface schematic diagram which looked at the nozzle concerning this modification from the upper part. It is a cross-sectional schematic diagram in cut surface AA represented to FIG. It is a cross-sectional schematic diagram showing the nozzle concerning the other specific example of this embodiment. It is the upper surface schematic diagram which looked at the nozzle concerning this modification from the upper part. It is an end surface schematic diagram in cut surface BB represented to FIG.

Embodiments of the present invention will be described below with reference to the drawings. In addition, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.
FIG. 1 is a schematic perspective view showing a toilet apparatus provided with a sanitary washing device according to an embodiment of the present invention.

  The toilet device shown in FIG. 1 includes a Western-style seat toilet (hereinafter simply referred to as “toilet” for convenience of explanation) 800 and a sanitary washing device 100 provided thereon. The sanitary washing device 100 includes a casing 400, a toilet seat 200, and a toilet lid 300. The toilet seat 200 and the toilet lid 300 are pivotally supported with respect to the casing 400 so as to be freely opened and closed.

  The casing 400 incorporates a local cleaning function unit that realizes cleaning of a human body part of a user sitting on the toilet seat 200. Further, for example, the casing 400 is provided with a seating detection sensor 404 that detects that the user has sat on the toilet seat 200. When the seating detection sensor 404 detects a user sitting on the toilet seat 200, when the user operates an operation unit such as a remote controller (not shown), the nozzle 410 can be advanced into the bowl 801 of the toilet 800. . In the sanitary washing device 100 shown in FIG. 1, the nozzle 410 has entered the bowl 801.

  One or a plurality of water discharge holes 411 are provided at the tip of the nozzle 410. And the nozzle 410 can wash | clean the human body part of the user who sat on the toilet seat 200 by injecting water from the water discharge hole 411 provided in the front-end | tip part. For example, in the nozzle 410 illustrated in FIG. 1, one of the two water discharge holes 411 is a water discharge hole for bidet cleaning, and the other water discharge hole 411 is a water discharge hole for butt cleaning. . In the present specification, “water” includes not only cold water but also heated hot water.

Next, the outline of the water discharge form of the wash water discharged from the nozzle of this embodiment will be described with reference to the drawings.
FIG. 2 is a conceptual schematic view illustrating the form of water discharged from the cleaning water discharged from the nozzle of this embodiment.
FIG. 3 is a conceptual schematic view illustrating another form of water discharge from the cleaning water discharged from the nozzle of this embodiment.
FIG. 4 is a conceptual schematic view illustrating still another form of water discharge from the cleaning water discharged from the nozzle of this embodiment.

  As described above with reference to FIG. 1, the nozzle 410 according to the present embodiment can spray the cleaning water 500 from the water discharge hole 411 toward the human body part of the user sitting on the toilet seat 200. At this time, the wash water 500 is discharged so as to diffuse from the water discharge hole 411 as shown in FIGS. Then, the cleaning water 500 is evenly distributed inside the region where the cleaning water 500 is diffused. That is, the sanitary washing device 100 according to the present embodiment has a water discharge means for discharging the wash water 500 so as to diffuse from the water discharge hole 411 of the nozzle 410 and spreading the wash water 500 evenly inside the diffusion region. Prepare.

  Moreover, the sanitary washing device 100 according to the present embodiment includes water discharge critical region forming means. This water discharge critical area forming means prevents the wash water 500 from splashing outward from the predetermined area where the wash water 500 discharged from the water discharge hole 411 is diffused. The area is formed by the cleaning water 500 discharged from the water discharge hole 411. Then, the water discharge critical area forming means is configured such that the wash water 500 is discharged outwardly from the outer peripheral edge of the region where the wash water 500 is diffused until the wash water 500 discharged from the water discharge hole 411 reaches the human body part. It is possible to secure a critical water discharge area that prevents the scattering.

  2 to 4 exemplify a case where the cleaning water 500 is discharged from the water discharge hole 411 in a hollow conical shape as a liquid film having a hollow portion at the center. Hereinafter, for convenience of explanation, the washing water discharged in the hollow conical shape is referred to as “hollow conical discharged water”. Then, the granulated water flow (hereinafter, referred to as “granulated water flow” for convenience of explanation) 520 spreads uniformly inside the region where the hollow conical water discharge 510 diffuses. Further, the hollow conical water discharge 510 is a specific water discharge critical region that prevents the wash water 500 from splashing outward from the outer peripheral edge of the region where the wash water 500 discharged from the water discharge hole 411 diffuses. It is an example.

  In the hollow portion of the hollow conical water discharge 510, the amount of air discharged from the hollow portion of the hollow conical water discharge 510 to the outside increases following the flow of the liquid film. On the other hand, since the passage of air entering the hollow portion of the hollow conical water discharge 510 is blocked by the liquid film of the hollow conical water discharge 510, the air is discharged from the hollow portion of the hollow conical water discharge 510 to the center of the air. It will be limited. Therefore, the amount of air entering the hollow portion of the hollow conical water discharge 510 is reduced, and a negative pressure state in which the pressure is lower than the outside air is generated in the hollow portion of the hollow conical water discharge 510. A part of the granulated water flow 520 traveling in the traveling direction of the liquid film is drawn into the hollow portion by the negative pressure generated in the hollow portion of the hollow conical water discharge 510. Thereby, the granulated water flow 520 can spread evenly inside the region where the hollow conical water discharge 510 diffuses.

  However, the water discharge form of the cleaning water 500 discharged from the nozzle 410 of the present embodiment is not limited to this. For example, the cleaning water 500 may be discharged from the water discharge hole 411 of the nozzle 410 as the granulated water flow 520 instead of as the hollow conical water discharge 510 of the liquid film. Even in this case, the granulated water flow 520 is discharged so as to diffuse from the water discharge holes 411, and spreads evenly inside the region where it is diffused. This will be described in detail later.

  The outline of the water discharge form illustrated in FIG. 2 to FIG. 4 will be described more specifically. In the water discharge form shown in FIG. 2, the hollow conical water discharge 510 is crushed before landing on the human body part, and the granulated water flow Transition to 520. And the granulated water flow 520 lands in a wider area of the human body part. That is, the wash water 500 ejected from the nozzle 410 is filled in the hollow portion by the granulated water flow 520 that has been crushed and transitioned by the hollow conical water discharge 510 itself, and reaches the human body local area.

  Further, in the water discharge form shown in FIG. 3, the straight flow 530 is discharged into the central portion of the hollow conical water discharge 510, that is, the hollow portion. The straight flow 530 is crushed before landing on the human body part, and transitions to the granulated water flow 520. That is, the wash water 500 ejected from the nozzle 410 is filled in the hollow portion of the hollow conical water discharge 510 by the granulated water flow 520 that has been transitioned by the straight flow 530 being crushed and landed on the local body part.

  In addition, the form discharged to the hollow part of the hollow conical water discharge 510 is not limited to the straight flow 530 but may be a swirl flow. That is, a swirling flow may be discharged into the hollow portion of the hollow conical water discharge 510, and the swirling flow may be crushed before landing on the human body local part, and may transition to the granulated water flow 520.

  In the form of water discharge shown in FIG. 4, the granulated water flow 520 is discharged into the central portion of the hollow conical water discharge 510, that is, the hollow portion. That is, in the water discharge form shown in FIG. 2, the hollow conical water discharge 510 itself transitions to the granulated water flow 520, whereas in the water discharge form shown in FIG. 3, the straight flow 530 changes to the granulated water flow 520. 4, the granulated water flow 520 is discharged from the nozzle 410 in the hollow portion of the hollow conical water discharge 510. As a result, the wash water 500 sprayed from the nozzle 410 is filled in the hollow portion of the hollow conical water discharge 510 by the granulated water flow 520 discharged from the nozzle 410 and reaches the human body part.

  2 to 4, the hollow conical water discharge 510 may land on the human body part in a state where the liquid film is crushed and granulated, or remains in the liquid film state. You may land on the human body part. Further, as described above, the cleaning water 500 may be discharged from the water discharge hole 411 of the nozzle 410 as the granulated water flow 520 instead of the liquid cone hollow conical water discharge 510.

FIG. 5 is a graph showing the landing pressure and the amount of landing water in the washing water landing portion.
FIG. 6 is a graph showing another landing pressure and the amount of landing water in the washing water landing portion.
Moreover, FIG. 7 is a graph showing still another landing pressure and landing water amount in the washing water landing portion.

  As described above with reference to FIGS. 2 to 4, the cleaning water 500 is evenly distributed inside the region where the cleaning water 500 is diffused. More specifically, for example, the granulated water flow 520 is evenly distributed inside the region where the hollow conical water discharge 510 is diffused. Alternatively, for example, the granulated water stream 520 is evenly distributed inside the region where the granulated water stream 520 is diffused. Here, the diameter of the granulated water flow 520 is, for example, about 1 mm (millimeter), and is larger than a mist having a diameter of, for example, about 10 to 100 μm (micron).

  That is, the cleaning water 500 sprayed from the nozzle 410 is discharged so as to diffuse from the water discharge hole 411, and the cleaning water 500 spreads uniformly inside the region where the cleaning water 500 diffuses. Accordingly, the sanitary washing device 100 according to the present embodiment can make the washing water 500 land directly and uniformly over a wide range around the human body part.

  As a result, when the cleaning water 500 discharged from the water discharge hole 411 reaches the human body part, the landing pressure and the amount of the landing water in the landing portion of the cleaning water 500 are as shown in FIG. The central portion and the outer peripheral portion are substantially the same, or as shown in FIG. 6, larger at the outer peripheral portion than the central portion of the landing portion, or as shown in FIG. 7, than the outer peripheral portion of the landing portion. Also grows in the center.

Here, in the present specification, “landing pressure” is a momentum per unit area and refers to a force that removes, peels off, or floats.
In the specification of the present application, “amount of landing water” is the amount of water landing per unit time, and refers to the power to wash away dirt.

  The cleaning range of the cleaning water 500 (the cleaning area at the time of landing) is about φ35 to 45 mm, for example. That is, the width of the rising portion shown in FIGS. 5, 6, and 7 corresponds to, for example, about 35 to 45 mm.

  Therefore, for example, during menstruation, menstrual blood stains may adhere over a wide area around the female local area, but the sanitary washing device 100 according to the present embodiment wants to clean the wide area at once. We can meet your needs. In addition, since the washing water 500 is directly and uniformly landed in a wide area around the female local area, the washing pressure at the center of the washing area is lower than that in the case where the conventional straight flow has landed. There is little risk that a strong stimulus will be applied to the delicate area of women located near the center of the city. Therefore, the sanitary washing device 100 according to the present embodiment can realize bidet washing with a very comfortable washing feeling.

  Moreover, since the sanitary washing device 100 according to the present embodiment can land at once in a wider range than the conventional bidet washing, the nozzle 410 is moved in the front-rear direction and the left-right direction (see arrows shown in FIG. 1). There is no need to move the landing position by moving the seating position, or the user sitting on the toilet seat 200 moves the landing position by moving the sitting position. Therefore, the sanitary washing device 100 according to the present embodiment is less likely to give a sense of being traced when washing a female local part in a wide range. Also by this, the sanitary washing device 100 according to the present embodiment can realize bidet washing with a very comfortable washing feeling.

  Further, the water discharge critical area forming means of the present embodiment is configured such that the wash water 500 discharged from the water discharge hole 411 reaches the wide area around the female local area at the outer periphery of the region where the wash water 500 diffuses. A critical water discharge area that prevents the cleaning water 500 from splashing outward from the region is secured. Therefore, it is possible to prevent the cleaning water 500 from landing outside the cleaning area, and it is possible to prevent unnecessary portions (for example, thighs) outside the cleaning area from getting wet unnecessarily. Thereby, it can suppress that the user sitting on the toilet seat 200 senses discomfort by the part outside a desired washing area getting wet unnecessarily.

  Further, when the granulated water stream 520 is spread evenly inside the region where the cleaning water 500 is diffused, the diameter of the granulated water stream 520 is, for example, about 1 mm (millimeters) as described above, and the diameter is For example, it is large as compared with fog of about 10 to 100 μm (microns). According to this, the granulated water flow 520 is less likely to drift in the air, and is less likely to scatter outside the desired cleaning area. In other words, it is possible to prevent the granulated water flow 520 from landing on the outside of the cleaning area, and it is possible to prevent the portion outside the desired cleaning area from getting wet unnecessarily. Moreover, since the diameter of the granulated water flow 520 is larger, it is possible to further increase the landing pressure and the amount of landing water in the landing section. Therefore, for example, menstrual blood stains during menstruation can be dropped or floated in a shorter time, and can be washed out in a shorter time.

  Further, according to the present embodiment, the landing pressure at the landing portion of the cleaning water 500 is substantially the same at the central portion and the outer peripheral portion of the landing portion as shown in FIG. Alternatively, as shown in FIG. 6, the landing pressure at the landing portion of the cleaning water 500 is higher at the outer peripheral portion than at the central portion of the landing portion. Here, the outer peripheral portion of the desired cleaning area is an area that is desired to be positively cleaned when menstrual blood stains are attached to the woman. Therefore, when the water landing pressure at the outer peripheral portion is substantially the same as the water landing pressure at the central portion or higher than the water landing pressure at the central portion, the cleaning water 500 having a high cleaning power reaches the area where menstrual dirt is to be removed. To do. On the other hand, since the wash water having a low landing pressure is landed on the delicate area of the woman, the feeling of irritation stronger than necessary is not added. Therefore, the sanitary washing device 100 according to the present embodiment can remove or lift menstrual stains in a shorter time, and can realize bidet washing with a very comfortable washing feeling. Therefore, the sanitary washing device 100 according to the present embodiment is suitable as a device used by women during menstruation. In particular, the menstrual dirt tends to dry out and adhere to the periphery of the female local area, but the sanitary washing device according to the present embodiment in which the water landing force of the outer peripheral portion is larger than the water landing force of the central portion is fixed. Suitable for washing off blood stains.

  Further, according to the present embodiment, the amount of landing water in the landing portion of the cleaning water 500 is substantially the same in the central portion and the outer peripheral portion of the landing portion as shown in FIG. Alternatively, as shown in FIG. 6, the amount of landing water in the landing portion of the cleaning water 500 is larger in the outer peripheral portion than in the central portion of the landing portion. Here, as described above, the outer peripheral portion of the desired cleaning area is an area that is desired to be actively cleaned when menstrual blood stains are attached to a woman. Therefore, when the amount of landing water at the outer peripheral portion is substantially the same as the amount of landing water at the central portion or larger than the amount of landing water at the central portion, a sufficient amount of the washing water 500 reaches the area where menstrual stains are to be removed. To do. On the other hand, since the washing water with a small amount of landing water reaches the delicate area of the woman, discomfort caused by washing with a larger amount of water than necessary can be suppressed. Therefore, menstrual blood stains can be reliably taken in by the washed water 500 that has landed, washed away in a shorter time, and a bidet cleaning with a very comfortable cleaning feeling can be realized. Therefore, as described above, the sanitary washing device 100 according to the present embodiment is suitable as a device used by women during menstruation.

Next, a specific example of the present embodiment will be described with reference to the drawings.
FIG. 8 is a schematic cross-sectional view illustrating a nozzle according to a specific example of the present embodiment.
As shown in FIG. 8, the nozzle 410 of this specific example includes a nozzle body 440 and a throat 430. The nozzle main body 440 is provided with an inlet 441 through which cleaning water supplied from a water source (not shown) flows into the nozzle main body 440 and an outlet 444 through which the cleaning water inside the nozzle main body 440 flows to the outside. In addition, inside the nozzle main body 440, a swirling unit 442 that swirls the water flowing in from the inlet 441, and a swirling chamber 443 that guides the swirling flow generated in the swirling unit 442 to the outlet.

  The throat 430 is formed in a cylindrical shape. A throat flow path 431 through which washing water discharged from the nozzle body 440 passes is provided inside the throat 430. Further, at one end of the throat channel 431, a water discharge hole 433 for discharging the cleaning water that has passed through the throat channel 431 to the outside of the throat 430 is formed.

  In the nozzle 410 of this specific example, a gap is provided between the nozzle body 440 and the throat 430. However, this gap is not necessarily provided. That is, the nozzle body 440 and the throat 430 may be integrally formed, and the outlet 444 of the nozzle body 440 and the throat flow path 431 of the throat 430 may be connected.

  When cleaning water is supplied to the nozzle 410 from a water source (not shown), the nozzle body 440 swirls the water flowing in from the inflow port 441 at the swivel unit 442 and then sprays mist from the outflow port 444 through the swirl chamber 443. Spray. At this time, the diameter of the sprayed mist is equivalent to the diameter of the mist of about 10 to 100 μm (microns), for example.

  Subsequently, the mist sprayed from the outlet 444 flows into the throat 430, that is, the throat flow path 431 while diffusing. Then, the mist flows along the inner wall of the throat flow path 431 while maintaining the turning force, and is guided to the water discharge hole 433. That is, part of the mist that passes through the throat flow path 431 flows so as to adhere to the inner wall of the throat flow path 431. Therefore, the mists that flow so as to adhere to the inner wall of the throat channel 431 gather together and have a larger diameter. Thereby, the diameter in the outer peripheral part of the wash water discharged from the water discharge hole 433 becomes larger than the diameter in the central part.

  According to this, the wash water 500 is discharged so as to diffuse from the water discharge hole 433. Then, the cleaning water 500 is evenly distributed inside the region where the cleaning water 500 is diffused. Therefore, the washing water 500 is directly and uniformly landed in a wide area around the human body part. As a result, the sanitary washing device 100 according to the present specific example can meet a demand for cleaning a wide range at a time when menstrual blood stains adhere to a wide range around the female local area. .

  Further, the landing pressure of the washing water 500 at the landing portion is higher at the outer peripheral portion than at the central portion of the landing portion. Or the amount of landing water in the landing part of the washing water 500 is larger in the outer peripheral part than in the central part of the landing part. Therefore, for example, menstrual blood stains during menstruation can be dropped or floated in a shorter time, and can be washed out in a shorter time.

FIG. 9 is a schematic cross-sectional view illustrating a nozzle according to another specific example of the present embodiment.
FIG. 10 is a schematic cross-sectional view showing a nozzle according to a comparative example.
FIG. 11 is a schematic cross-sectional view illustrating a modification of the throat.

  The nozzle 410 of this specific example includes a nozzle body 420 and a throat 430 as illustrated in FIG. 9. Inside the nozzle body 420, a nozzle body channel 421 through which cleaning water supplied from a water source (not shown) passes, a swirling chamber 423 capable of generating a swirling flow, and the washing water from the swirling chamber 423 is guided to the throat 430. And a communication path 425 is provided. In addition, a projecting portion 424 that generates a swirling flow with a more stable swirl force is provided at the center of the swirl chamber 423.

  The swirl chamber 423 is formed by a large-diameter inner peripheral wall 423e having a larger diameter at the bottom and an inclined inner peripheral wall 423f having a diameter contracted toward the communication path 425, and is a hollow chamber. The inclined inner peripheral wall 423f is connected to the communication path 425 at one end thereof. On the other hand, the nozzle body channel 421 is eccentrically connected to the swirl chamber 423. More specifically, the nozzle body channel 421 is connected in the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423.

  Inside the throat 430, a throat flow path 431 through which washing water discharged from the communication passage 425 of the nozzle body 420 passes is provided. Further, at one end of the throat channel 431, a water discharge hole 433 for discharging the cleaning water that has passed through the throat channel 431 to the outside of the throat 430 is formed. In the throat flow path 431 in the vicinity of the water discharge hole 433, a taper portion 432 is formed in which the flow path expands toward the water discharge hole 433.

  In the nozzle 410 of this specific example, a gap is provided between the nozzle body 420 and the throat 430, but this gap is not necessarily provided. That is, the nozzle body 420 and the throat 430 may be integrally formed, and the communication path 425 and the throat flow path 431 may be connected.

  When cleaning water is supplied from a water source (not shown) to the nozzle 410, the cleaning water passes through the nozzle body channel 421 and flows into the swirl chamber 423. Here, since the nozzle body channel 421 is connected in the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423, the wash water flowing into the swirl chamber 423 flows into the large-diameter inner peripheral wall 423e and the inclined inner peripheral wall 423f. Turn along. Then, the wash water swirled in the swirl chamber 423 passes through the communication path 425 while maintaining swirl force, and is discharged into the throat flow path 431 of the throat 430. At this time, since the cleaning water discharged from the nozzle body 420 maintains the turning force, it is discharged in a hollow conical shape as a liquid film having a hollow portion at the center.

  The wash water that has flowed into the throat flow path 431 flows along the inner wall of the throat flow path 431 while maintaining the turning force, and is guided to the water discharge hole 433. That is, the washing water passing through the throat flow path 431 flows so as to adhere to the inner wall of the throat flow path 431. Therefore, the wash water flowing through the throat flow path 431 receives resistance due to frictional force from the inner wall of the throat flow path 431, and the flow rate of the wash water becomes slower toward the water discharge hole 433. Accordingly, as shown in FIG. 9, the thickness of the liquid film in the vicinity of the water discharge hole 433 is the thickness of the liquid film when water is discharged from the nozzle body 420 or the liquid immediately after flowing into the throat flow path 431. Thicker than the film thickness.

  Further, the flow rate of the washing water flowing through the throat flow path 431 is faster in the center of the throat flow path 431 than in the vicinity of the inner wall of the throat flow path 431, that is, the boundary layer. Therefore, a vortex is generated in the direction of crossing the liquid film as indicated by an arrow A1 in FIG. 9 in the wash water flowing through the throat flow path 431. In addition, the throat flow path 431 in the vicinity of the water discharge hole 433 is formed with a tapered portion 432 whose flow path expands toward the water discharge hole 433, and thus the cleaning water discharged from the water discharge hole 433 is the tapered portion 432. Flowing along. Therefore, eddy currents are more likely to occur in the direction crossing the liquid film in the wash water discharged from the water discharge holes 433.

  Then, the wash water discharged from the water discharge hole 433 is discharged as a liquid film having a hollow portion at the center, that is, as the hollow conical water discharge 510, but to the granulated water flow 520 at a position somewhat away from the water discharge hole 433. Transition. More specifically, since a vortex flow is generated in the hollow conical water discharge 510 discharged from the water discharge hole 433 in a direction crossing the liquid film, it is adjacent to the water discharge hole 433 at a certain distance. Cracks occur between the vortex flows. Then, the hollow conical water discharge 510 discharged from the water discharge hole 433 is crushed at a position somewhat away from the water discharge hole 433 as shown in FIG. Thus, the hollow conical water discharge 510 discharged from the water discharge hole 433 transitions to the granulated water flow 520.

  Further, the pressure of the hollow portion of the hollow conical water discharge 510 is smaller than the pressure outside the hollow conical water discharge 510. This is because air does not easily enter the hollow portion of the hollow conical water discharge 510 from the outside, and the air in the hollow portion is drawn out by the flow of the hollow conical water discharge 510. Thus, when the pressure of the hollow part of the hollow conical water discharge 510 is smaller than the pressure outside the hollow conical water discharge 510, the hollow conical water discharge 510 is prevented from expanding the water discharge diameter (cone diameter). The

  Therefore, according to the nozzle 410 of this specific example, the granulated water flow 520 can be prevented from landing outside the cleaning area, and a portion outside the desired cleaning area (for example, the thigh) is unnecessary. Wetting can be suppressed. Thereby, it can suppress that the user sitting on the toilet seat 200 senses discomfort by the part outside a desired washing area getting wet unnecessarily.

  Furthermore, as described above with reference to FIGS. 5 to 7, the diameter of the granulated water flow 520 is, for example, about 1 mm, and is larger than a mist having a diameter of, for example, about 10 to 100 μm. As described above, this is because the flow rate of the cleaning water flowing through the throat flow path 431 becomes slower toward the water discharge hole 433, and the thickness of the liquid film in the vicinity of the water discharge hole 433 becomes thicker. That is, the hollow conical water discharge 510 discharged with a thicker liquid film is forcibly granulated by the vortex generated inside the throat 430, so that the diameter of the granulated water flow 520 is mist or the like. Big in comparison.

  According to this, the granulated water flow 520 is less likely to drift in the air, and is less likely to scatter outside the desired cleaning area. That is, according to the nozzle 410 of this specific example, the granulated water flow 520 can be prevented from landing outside the cleaning area, and the portion outside the desired cleaning area can be prevented from being unnecessarily wetted. it can. Moreover, since the diameter of the granulated water flow 520 is larger, it is possible to further increase the landing pressure and the amount of landing water in the landing section. Therefore, for example, menstrual blood stains during menstruation can be dropped or floated in a shorter time, and can be washed out in a shorter time.

  In addition, as described above with respect to the pressure of the hollow portion of the hollow conical water discharge 510 being smaller than the pressure outside the hollow conical water discharge 510, the pressure of the hollow portion of the hollow conical water discharge 510 is the same as that of the hollow conical water discharge 510. The pressure in the hollow portion of the hollow conical water discharge 510 when not crushed is larger. This is because, as indicated by an arrow A2 in FIG. 9, the air outside the hollow portion of the hollow conical water spouting 510 is caused by a crack generated between adjacent vortex flows or between the crushed hollow conical water spouting 510. It is for entering into a hollow part from. According to this, it is possible to suppress the possibility that a sufficiently wide cleaning range cannot be secured due to the pressure in the hollow portion of the hollow conical water discharge 510 becoming too small. Moreover, since the pressure of the hollow part of the hollow conical water discharge 510 is larger than the pressure of the hollow part of the hollow conical water discharge 510 when the hollow conical water discharge 510 is not crushed, it is possible to suppress the occurrence of liquid film waves. it can.

Here, the liquid film wave will be described with reference to the comparative example shown in FIG.
The nozzle of the comparative example shown in FIG. 10 does not have a throat. Therefore, the washing water that has flowed into the swirl chamber 423 swirls along the large-diameter inner peripheral wall 423e and the inclined inner peripheral wall 423f, passes through the communication passage 425, and forms a liquid film having a hollow portion at the center, that is, a hollow conical shape. Water is discharged as water discharge 510. That is, in the nozzle of this comparative example, one end of the communication path 425 functions as the water discharge hole 426.

  At this time, the flow rate of the wash water passing through the communication passage 425 of this comparative example is not as slow as the flow rate of the wash water flowing through the throat flow path 431 of the specific example shown in FIG. Therefore, the thickness of the liquid film of the cleaning water that passes through the communication path 425 of this comparative example is thinner than the thickness of the liquid film of the cleaning water flowing through the throat flow path 431 of the specific example shown in FIG. In addition, since the thickness of the liquid film of the cleaning water that passes through the communication path 425 of this comparative example is thinner, vortex flow hardly occurs in the direction of crossing the liquid film inside the cleaning water. Therefore, the hollow conical water discharge 510 discharged from the water discharge hole 426 of this comparative example is less likely to be crushed than the specific example shown in FIG.

  Then, the hollow conical spouting water 510 continues to expand without being crushed, and the thickness of the liquid film becomes thinner as the diameter of the spouting water discharge of the hollow conical spouting water 510 increases. Thereby, the liquid film of the hollow conical water discharge 510 is easily affected by the pressure difference between the hollow portion of the hollow conical water discharge 510 and the outer portion of the hollow conical water discharge 510.

  Therefore, as shown in FIG. 10, the hollow conical shape at a position spaced apart from the water discharge hole 426 to some extent by the pressure difference between the hollow portion of the hollow conical water discharge 510 and the outer portion of the hollow conical water discharge 510. In the discharged water 510, a phenomenon that a wave is generated while the state of the liquid film is maintained occurs. In the present specification, such a phenomenon is referred to as “liquid film wave”.

  When the liquid film of the hollow conical water discharge 510 is crushed after the liquid film wave is generated, the granulated water flow after crushed will be scattered in an irregular direction due to the influence of the wave, It becomes easy to scatter to the outside of the washing area. Then, the scattered washing water adheres to the user's thighs and the like seated on the toilet seat 200, and the user may feel uncomfortable.

  Further, the liquid film wave is generated when the thickness of the liquid film is reduced, and the trajectory of the liquid film is further increased due to the generation of the wave, so that the thickness of the liquid film is further reduced. That is, when the liquid film wave is generated in the hollow conical water discharge 510, the hollow conical water discharge 510 is crushed into particles having a smaller diameter than the granulated water flow 520 shown in FIG. Since the diameter and mass of the crushed particles are small, the small particles drift in the air and easily scatter to the outside of the desired cleaning area. Then, the scattered washing water adheres to the user's thighs and the like seated on the toilet seat 200, and the user may feel uncomfortable.

  On the other hand, in the nozzle 410 according to this specific example, the thickness of the liquid film in the vicinity of the water discharge hole 433 is the thickness of the liquid film when water is discharged from the nozzle body 420 or flows into the throat flow path 431. It is larger than the thickness of the liquid film immediately after. Therefore, eddy currents are more likely to occur in the direction crossing the liquid film in the wash water discharged from the water discharge holes 433. According to this, since the hollow conical water discharge 510 is easily crushed and air easily enters the hollow portion, the pressure in the hollow portion of the hollow conical water discharge 510 can be prevented from becoming smaller. Therefore, it can suppress that a liquid film wave generate | occur | produces in the hollow conical water discharge 510. FIG.

  According to this, the water flow granulated by the influence of the wave is scattered in an irregular direction, and it is possible to suppress the washing water from being scattered outside the desired washing area. It can suppress that a part gets wet unnecessary. Further, the hollow conical water discharge 510 can be prevented from being crushed into grains having a smaller diameter. That is, in order to prevent the generation of the liquid film wave or to force the hollow conical water discharge 510 to be granulated by the vortex generated inside the throat 430 before the liquid film wave is generated, The diameter of 520 can be made larger. Therefore, it is possible to prevent the cleaning water from scattering to the outside of the desired cleaning area, and it is possible to suppress the portion outside the desired cleaning area from getting wet unnecessarily. Therefore, it is possible to suppress a user sitting on the toilet seat 200 from feeling uncomfortable when a portion outside the desired cleaning area gets wet unnecessarily.

  Moreover, since it can suppress that a liquid film wave generate | occur | produces in the hollow conical water discharge 510, it can suppress that the grade of the negative pressure which generate | occur | produces in the hollow part of the hollow conical water discharge 510 becomes large too much. Therefore, in a state where the granulated water flow 520 is spread evenly in the hollow portion of the hollow conical water discharge 510 (inside the region where the washing water 500 diffuses), a wider range of the human body part of the user sitting on the toilet seat 200 The washing water can be made to land on the surface. Therefore, a desired wide range can be quickly cleaned.

  When the spiral groove 435 is formed on the inner wall of the throat channel as in the modification shown in FIG. 11, the washing water flowing through the throat channel has a greater resistance from the spiral groove 435. Receive. More specifically, the speed of the swirl component of the wash water flowing through the throat flow path is maintained, and the speed of the straight component is reduced.

  In addition, the contact time between the cleaning water flowing through the throat flow path and the spiral groove 435 is longer than when the spiral groove 435 is not provided. Therefore, in this modification, the wash water flowing through the throat flow channel receives frictional force from the spiral groove 435 for a longer time than when the spiral groove 435 is not provided.

  Therefore, the thickness of the liquid film of the cleaning water flowing through the throat flow path of this modification is larger than the thickness of the liquid film of the cleaning water flowing through the throat flow path 431 of the specific example shown in FIG. That is, by forming the spiral groove 435 on the inner wall of the throat channel, the thickness of the liquid film in the vicinity of the water discharge hole 433 can be increased. Thereby, the hollow conical water discharge 510 discharged from the water discharge hole 433 is more reliably crushed at a position apart from the water discharge hole 433 to some extent.

FIG. 12 is a schematic cross-sectional view showing a nozzle according to still another specific example of the present embodiment.
The nozzle 410 according to this specific example does not have a throat but has a nozzle body 420. The washing water flowing into the swirl chamber 423 swirls in the swirl chamber 423, passes through the communication path 425, and is discharged as a liquid film having a hollow portion at the center, that is, as a hollow conical water discharge 510. That is, in the nozzle 410 of this specific example, one end of the communication path 425 functions as the water discharge hole 426.

  In addition, the sanitary washing device 100 including the nozzle 410 according to this specific example includes a fluid ejection device 460 that crushes the hollow conical water discharge 510 discharged from the water discharge hole 426 on the upstream side of the nozzle 410. The fluid ejection device 460 is, for example, a pump that can generate a liquid flow or an airflow. In the nozzle body 420, an ejection flow path 461 through which a liquid flow or an air flow supplied from the fluid ejection device 460 passes is provided. One end of the ejection channel 461 is connected to the fluid ejection device 460, and the other end functions as an ejection hole 463 that ejects a liquid flow or an air current supplied from the fluid ejection device 460. The other structure is the same as that of the nozzle 410 according to the specific example described above with reference to FIG.

  As shown in FIG. 12, the nozzle 410 according to this specific example injects the liquid flow or air flow supplied from the fluid injection device 460 through the injection flow path 461 from the injection hole 463 and discharges water from the water discharge hole 426. It can be made to collide with the hollow conical water discharge 510. According to this, the hollow conical water discharge 510 discharged from the water discharge hole 426 is crushed by the liquid flow or air flow injected from the injection hole 463 and transitions to the granulated water flow 520. And the nozzle 410 concerning this example can distribute the granulated water flow 520 uniformly in the hollow part (inside the area | region where the washing water 500 spread | diffuses) of the hollow conical water discharge 510. FIG.

  According to this specific example, by colliding the liquid flow or the air flow with the hollow conical water discharge 510, the hollow conical water discharge 510 is crushed, so that the crushing position can be controlled more reliably. As a result, the cleaning water can be landed more accurately in the desired cleaning range. Further, with respect to other effects, the same effects as those described above with reference to FIGS.

FIG. 13 is a schematic cross-sectional view showing a nozzle according to still another specific example of the present embodiment.
FIG. 14 is a schematic cross-sectional view illustrating the internal structure of the pressure modulation device of this example.
FIG. 15 is a schematic cross-sectional view illustrating another internal structure of the pressure modulation device of this example.

  The nozzle 410 according to this specific example does not have a throat and has a nozzle main body 420, like the specific example nozzle 410 described above with reference to FIG. The washing water flowing into the swirl chamber 423 swirls in the swirl chamber 423, passes through the communication path 425, and is discharged as a liquid film having a hollow portion at the center, that is, as a hollow conical water discharge 510. That is, in the nozzle 410 of this specific example, one end of the communication path 425 functions as the water discharge hole 426.

  Further, the sanitary washing device 100 including the nozzle 410 according to this specific example includes the pressure modulation device 470 in the middle of the nozzle main body flow path 421. The pressure modulation device 470 can pulsate the flow of water in the nozzle body flow path 421 and pulsate the cleaning water discharged from the water discharge holes 426. The other structure is the same as that of the nozzle 410 according to the specific example described above with reference to FIG.

Here, an example of the internal structure of the pressure modulation device 470 will be described with reference to the internal structure illustrated in FIG.
As described above, the pressure modulation device 470 shown in FIG. 14 can pulsate the flow of water in the nozzle body channel 421. Here, “pulsation” in the present specification refers to fluctuations in pressure caused by the pressure modulation device 470. Therefore, the pressure modulation device 470 is a device that varies the pressure of water in the nozzle body channel 421.

  As shown in FIG. 14, the pressure modulation device 470 is provided in a cylinder 471 connected to the nozzle main body flow path 421, a plunger 472 provided in the cylinder 471 so as to freely advance and retreat, and the plunger 472. It includes a check valve 473 and a pulsation generating coil 474 that moves the plunger 472 back and forth by controlling the excitation voltage.

  When the position of the plunger 472 changes to the nozzle 410 side (downstream side), the pressure of water downstream from the pressure modulator 470 increases, and the side opposite to the nozzle 410 (upstream side). In the case of changing to, a check valve is arranged so that the pressure of water downstream of the pressure modulator 470 decreases. In other words, when the position of the plunger 472 changes to the nozzle 410 side (downstream side), the pressure of water upstream from the pressure modulator 470 decreases, and the side opposite to the nozzle 410 (upstream side). ), The pressure of water upstream of the pressure modulator 470 increases.

  Then, by controlling the excitation of the pulsation generating coil 474, the plunger 472 is advanced and retracted upstream and downstream. That is, when pulsation is added to the water in the nozzle main body flow path 421 (when the pressure of the water in the nozzle main body flow path 421 is changed), the plunger is controlled by controlling the excitation voltage flowing through the pulsation generating coil 474. 472 is moved forward and backward in the axial direction (upstream / downstream) of the cylinder 471.

  In this case, the plunger 472 moves from the illustrated original position (plunger original position) to the downstream side 475 by excitation of the pulsation generating coil 474. When the excitation of the pulsation generating coil 474 disappears, the pulsation generating coil 474 returns to the original position by the urging force of the return spring 476. At this time, the return movement of the plunger 472 is buffered by the buffer spring 477. The plunger 472 has a duck pill type check valve 473 in the inside thereof, and prevents backflow to the upstream side.

  Therefore, when the plunger 472 moves from the plunger original position to the downstream side, the water in the cylinder 471 is pressurized and can be pushed into the nozzle body channel 421 on the downstream side. In other words, when the plunger 472 moves from the plunger original position to the downstream side, the water in the nozzle body channel 421 on the upstream side can be decompressed and sucked into the cylinder 471. At this time, since the plunger original position and the position moved downstream are always constant, the amount of washing water sent to the downstream nozzle body channel 421 is constant when the plunger 472 operates.

  Thereafter, when returning to the original position, the washing water flows into the cylinder 471 through the check valve 473. Therefore, in the next movement of the plunger 472 on the downstream side, a certain amount of washing water is sent again to the downstream nozzle body channel 421. In this way, the pressure modulation device 470 shown in FIG. 14 can pulsate the flow of water in the nozzle body channel 421.

Next, another example of the internal structure of the pressure modulation device 470 will be described with reference to the internal structure illustrated in FIG.
The pressure modulation device 470 shown in FIG. 15 has a two-unit configuration including a first pressure modulation device 91 and a second pressure modulation device 92. The first pressure modulation device 91 and the second pressure modulation device 92 are provided with cylinders 910a and 920a each having a cylindrical space. Pistons 910b and 920b are provided in the cylinders 910a and 920a. O-rings 910c and 920c are attached to the pistons 910b and 920b. Respective spaces defined by the pistons 910b and 920b and the cylinders 910a and 920a become pressure chambers 910d and 920d.

  Into the pressurizing chambers 910d and 920d, the washing water inlets 910e and 920e are branched from the nozzle body channel 421 so that the washing water flows. Then, pipes (not shown) branched from the nozzle body channel 421 are connected to the washing water inlets 910e and 920e so that the washing water can flow into the pressurizing chambers 910d and 920d from the nozzle body channel 421. ing.

  At that time, the umbrella packing 910f, 920f prevents back flow. That is, umbrella packings 910f and 920f are provided at portions where the cleaning water inlets 910e and 920e open to the pressurizing chambers 910d and 920d, and the cleaning water flowing into the pressurizing chambers 910d and 920d is upstream of the nozzle main body channel 421. It does not flow backward to the side.

  In addition, washing water outlets 910g and 920g are provided, and merged in the middle, and pressurized washing water flows out. That is, the washing water outlets 910g and 920g are provided at the ceiling portions of the pressurizing chambers 910d and 920d, respectively. Pipes are connected to the washing water outlets 910g and 920g, respectively, and each connected pipe is connected to the downstream nozzle body flow path 421 through a branch portion. Therefore, the wash water that has flowed out of the pressurizing chambers 910d and 920d joins on the way, and flows out to the downstream side of the nozzle body channel 421 as pressurized wash water.

  A gear 912 is attached to the rotation shaft of the motor 911, and the gear 912 and the gear 913 are engaged with each other. Also, a crankshaft 914 that operates the piston 910b of the first pressure modulator 91 and a crankshaft 924 that operates the piston 920b of the second pressure modulator 92 are attached to the gear 913 at different positions. Yes. The crankshafts 914 and 924 are attached to the pistons 910b and 920b via the piston holding portions 915 and 925. The position of the crankshaft attached to the gear 913 is different from each other so that the stroke amounts of the piston 910b and the piston 920b are different, and the crankshaft is attached to a position having a 90 ° phase difference. Further, the stroke of the piston 920b of the second pressure modulator 92 is set to be shorter than the stroke of the piston 910b of the first pressure modulator 91 and the phase is shifted by 90 °. As described above, since the operations of the pistons 910b and 920b are set in advance according to the mounting positions of the gear 913 and the crankshafts 914 and 924, the pressure modulation device 470 can be simply controlled simply by turning on / off the motor energization switch. Can perform a predetermined operation.

  When the motor 911 is energized, the rotating shaft rotates, so that the pistons 910b and 920b reciprocate up and down via the gears 912 and 913, the crankshafts 914 and 924, and the piston holding portions 915 and 925. When the pressurized chamber is filled with cleaning water, the volume of the pressurizing chamber is reduced when the piston 910b (920b) moves from the bottom dead center (original position) to the top dead center. Then, it is pushed away toward the downstream side of the nozzle body channel 421.

  Then, when returning from the top dead center to the bottom dead center (original position), the pressure in the pressurizing chamber decreases, the umbrella packings 910f and 920f open, and the cleaning water flows into the pressurizing chamber. After that, at the next piston movement, the washing water is pressurized again, and the pressure fluctuation, that is, the pulsation is generated by performing this process continuously. In this manner, the pressure modulation device 470 shown in FIG. 15 can pulsate the flow of water in the nozzle body flow path 421.

  According to this specific example, the pressure modulator 470 can give pulsation to the wash water discharged from the water discharge hole 426, so that the hollow conical water discharge 510 discharged from the water discharge hole 426 causes the liquid film to flow. Cracks occur in the direction crossing. As a result, the hollow conical water discharge 510 transitions to a granulated water stream 520 having a larger diameter. And the nozzle 410 concerning this example can distribute the granulated water flow 520 uniformly in the hollow part (inside the area | region where the washing water 500 spread | diffuses) of the hollow conical water discharge 510. FIG.

  According to this, since the hollow conical water discharge 510 discharged from the water discharge hole 426 is crushed in the direction crossing the liquid film by the pulsation given by the pressure modulator 470, the diameter of the granulated water flow 520 is more large. Therefore, it is possible to further increase the landing pressure and the amount of landing water in the landing section. Thereby, for example, menstrual blood stains during menstruation can be dropped or floated in a shorter time, and can be washed out in a shorter time. Further, with respect to other effects, the same effects as those described above with reference to FIGS.

FIG. 16 is a schematic perspective view illustrating a nozzle according to a modification of the present embodiment.
FIG. 17 is a schematic top view of the nozzle according to this modification as viewed from above.
FIG. 18 is a schematic sectional view taken along the cutting plane AA shown in FIG.
In the schematic perspective view shown in FIG. 16, for convenience of explanation, the internal structure is also appropriately indicated by a solid line.

  The nozzle 410 according to this modification has a nozzle body 420. A swirl flow channel 427 and a straight flow channel 428 are provided in the nozzle body 420. As shown in FIG. 17, the swirl flow channel 427 is connected in the tangential direction of the large-diameter inner peripheral wall 423 e of the swirl chamber 423. On the other hand, as shown in FIG. 17, the straight flow channel 428 is connected to the large-diameter inner peripheral wall 423 e so as to go to the axial center of the swirl chamber 423. The other structure is the same as that of the nozzle 410 according to the specific example described above with reference to FIG.

  Since the swirl flow channel 427 is connected to the tangential direction of the large-diameter inner peripheral wall 423e of the swirl chamber 423, the wash water that has passed through the swirl flow channel 427 and flowed into the swirl chamber 423 is large-diameter inner peripheral wall 423e. And it turns along the inclined inner peripheral wall 423f. This is as described above with reference to FIG. On the other hand, since the straight flow channel 428 is connected to the large-diameter inner peripheral wall 423e so as to be directed to the axial center of the swirl chamber 423, the wash water flowing into the swirl chamber 423 through the straight flow channel 428 is Water is discharged from one end of the communication path 425, that is, the water discharge hole 426 without turning.

  Therefore, according to this modification, when the cleaning water is caused to flow into the swirl chamber 423 only through the swirl flow channel 427, the hollow conical water discharge 510 having a larger swirl force can be discharged from the water discharge hole 426. . Further, when the nozzle 410 according to the present modification includes the throat 430 illustrated in FIG. 9, the hollow conical water discharge 510 discharged from the water discharge hole 433 transitions to the granulated water flow 520. Therefore, in this case, a wider range can be quickly cleaned at a time.

  On the other hand, when the cleaning water flows into the swirl chamber 423 not only through the swirl flow channel 427 but also through the swirl flow channel 427 and the straight flow channel 428, the swirl force of the swirl flow generated in the swirl chamber 423. Is reduced as compared with the case where washing water is introduced into the swirl chamber 423 only through the swirl flow channel 427. This is because the swirling flow caused by the wash water flowing into the swirl chamber 423 from the swirl flow channel 427 interferes with the straight flow caused by the wash water flowing into the swirl chamber 423 from the straight flow channel 428. Therefore, in this case, the hollow conical water discharge 510 having a smaller swirl force than that in the case where the washing water flows into the swirl chamber 423 only through the swirl flow channel 427 is discharged from the water discharge hole 426.

According to this, it is possible to clean a narrower range than the case where the cleaning water flows into the swirl chamber 423 only through the swirl flow channel 427. That is, the user can intensively clean the portion to be cleaned as desired.
Therefore, according to this modification, the user appropriately changes the ratio between the flow rate of the cleaning water passing through the swirl flow channel 427 and the flow rate of the cleaning water passing through the straight flow channel 428. It is possible to switch between a cleaning mode in which a wider range is cleaned at a time and a cleaning mode in which a narrower range is more focused.

  In addition, when the nozzle 410 according to this modification includes the throat 430, it is more preferable to provide a gap between the nozzle body 420 and the throat 430 as illustrated in FIG. According to this, by taking air into the throat flow path 431 through the gap, it is possible to more easily form a water discharge mode in a cleaning mode in which a narrower range is preferentially cleaned.

FIG. 19 is a schematic cross-sectional view showing a nozzle according to still another specific example of the present embodiment.
FIG. 20 is a schematic top view of the nozzle according to this modification as viewed from above.
FIG. 21 is a schematic end face view taken along the cutting plane BB shown in FIG.
In the schematic perspective view shown in FIG. 19, for convenience of explanation, the internal structure is also appropriately represented by a solid line.

  The nozzle 410 of this specific example includes a nozzle body 420 as shown in FIG. Inside the nozzle body 420 are a first nozzle body channel 421a and a second nozzle body channel 421b through which wash water supplied from a water source (not shown) passes, and a first swirl chamber capable of generating a swirl flow. 423a and a second swirl chamber 423b. As shown in FIG. 20, the first nozzle body channel 421a and the second nozzle body channel 421b are connected to the first swirl chamber 423a and the second swirl chamber 423b in a tangential direction, respectively. Yes. The first nozzle body channel 421a and the first swirl chamber 423a are provided above the second nozzle body channel 421b and the second swirl chamber 423b.

  At the center of the first swirl chamber 423a, a projecting portion 424a that generates a swirl flow with a more stable swirl force is provided. In addition, a first communication path 425a connected to the first swirl chamber 423a is provided above the first swirl chamber 423a. One end of the first communication path 425 a functions as a first water discharge hole 426 a that discharges the cleaning water that has passed through the first communication path 425 a to the outside of the nozzle body 420. On the other hand, a second communication path 425b is provided above the second swirl chamber 423b. As shown in FIG. 21, one end of the second communication passage 425b is connected to the second swirl chamber 423b, and the other end is a second water discharge hole 426b provided through the protruding portion 424a. Function.

  Since the first nozzle body channel 421a is tangentially connected to the first swirl chamber 423a, the cleaning that has flowed into the first swirl chamber 423a through the first nozzle body channel 421a. Water swirls in the first swirl chamber 423a. Then, the wash water swirled in the first swirl chamber 423a passes through the first communication path 425a while maintaining swirl force, and is discharged from the first water discharge hole 426a. At this time, since the washing water discharged from the first water discharge hole 426a maintains the turning force, it is discharged as a liquid film having a hollow portion at the center, that is, as the hollow conical water discharge 510.

  On the other hand, since the second nozzle body channel 421b is tangentially connected to the second swirl chamber 423b, it flows through the second nozzle body channel 421b and flows into the second swirl chamber 423b. The washed water swirls in the second swirl chamber 423b. Then, the wash water swirled in the second swirl chamber 423b passes through the second communication path 425b while maintaining swirl force, and is discharged from the second water discharge hole 426b.

  At this time, as shown in FIGS. 19 and 21, the length of the second communication path 425b is longer than the length of the first communication path 425a. Therefore, the resistance received by the cleaning water passing through the second communication path 425b is greater than the resistance received by the cleaning water passing through the first communication path 425a. Therefore, the turning force of the washing water discharged from the second water discharge hole 426b is weaker than the turning force of the hollow conical water discharge 510 discharged from the first water discharge hole 426a.

  Therefore, the wash water discharged from the second water discharge hole 426b is discharged as the hollow conical water discharge 510, and the water discharge diameter is larger than the water discharge diameter of the hollow conical water discharge 510 discharged from the first water discharge hole 426a. small. Alternatively, the wash water discharged from the second water discharge hole 426b is discharged as water discharged in a state where the turning force is sufficiently reduced, that is, as a straight flow. Thereby, in any case, the wash water discharged from the second water discharge hole 426b is discharged into the hollow portion of the hollow conical water discharge 510 discharged from the first water discharge hole 426a.

  Then, since the swirl force of the wash water discharged from the second water discharge hole 426b is weaker than the swirl force of the hollow conical water discharge 510 discharged from the first water discharge hole 426a, the water discharge from the second water discharge hole 426b. The washed water is crushed before landing on the human body part, and transitions to the granulated water stream 520. That is, the hollow conical water discharge 510 discharged from the first water discharge hole 426a is a hollow portion of the hollow conical water discharge 510 due to the granulated water flow 520 that is transitioned by the washing water discharged from the second water discharge hole 426b being crushed. To fill the human body part.

  Alternatively, the wash water discharged from the second water discharge hole 426b is discharged as the granulated water flow 520. Then, the granulated water flow 520 discharged from the second water discharge hole 426b reaches the hollow portion of the hollow conical water discharge 510 discharged from the first water discharge hole 426a (inside the region where the cleaning water 500 diffuses). That is, the hollow conical water discharge 510 discharged from the first water discharge hole 426a is filled with the hollow portion of the hollow conical water discharge 510 by the granulated water flow 520 discharged from the second water discharge hole 426b, and reaches the local body part. Water.

  According to this specific example, apart from the water discharge for defining the cleaning range, that is, separately from the hollow conical water discharge 510 discharged from the first water discharge hole 426a, the hollow portion of the hollow conical water discharge 510 (cleaning Water discharge for spreading the granulated water flow 520 to the inside of the region where the water 500 diffuses is performed. Therefore, it is possible to control more easily so that the landing pressure and the amount of landing water in the cleaning area are uniform. Further, for example, since it is not necessary to provide the throat 430 shown in FIG. 9, the structure of the nozzle 410 can be simplified. Further, with respect to other effects, the same effects as those described above with reference to FIGS.

The embodiment of the present invention has been described above. However, the present invention is not limited to these descriptions. As long as the features of the present invention are provided, those skilled in the art appropriately modified the design of the above-described embodiments are also included in the scope of the present invention. For example, the shape, dimensions, material, arrangement, etc. of each element included in the nozzle 410, the nozzle body 420, the throat 430, and the like, the installation form of the throat 430, and the like are not limited to those illustrated, and can be changed as appropriate. .
Moreover, although the case where the female local part was wash | cleaned was demonstrated, it is applicable also when wash | cleaning a "buttock". In particular, in the case of diarrhea, the present embodiment can be suitably used in which a wider range is quickly washed without splashing water to the thigh. In addition, for a person with a beard, this embodiment in which the water is strongly applied to the peripheral part without strongly landing on the anus, more specifically, water droplets having a small diameter are attached to the anus and the peripheral part is applied to the peripheral part. By this embodiment of landing water droplets having a large diameter, more comfortable cleaning can be realized.
Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

  91 First pressure modulation device, 92 Second pressure modulation device, 100 Sanitary washing device, 200 Toilet seat, 300 Toilet lid, 400 Casing, 404 Seating detection sensor, 410 Nozzle, 411 Water discharge hole, 420 Nozzle main body, 421 Nozzle main body 421a first nozzle body channel, 421b second nozzle body channel, 423 swirl chamber, 423a first swirl chamber, 423b second swirl chamber, 423e large diameter inner wall, 423f inclined inner wall, 424 projecting part, 424a projecting part, 425 communication path, 425a first communication path, 425b second communication path, 426 water discharge hole, 426a first water discharge hole, 426b second water discharge hole, 427 swirl flow Road, 428 straight flow path, 430 throat, 431 throat flow path, 432 taper, 433 water discharge Hole, 435 spiral groove, 440 nozzle body, 441 inflow port, 442 swirl unit, 443 swirl chamber, 444 outflow port, 460 fluid injection device, 461 injection flow path, 463 injection hole, 470 pressure modulation device, 471 cylinder, 472 Plunger, 473 check valve, 474 pulsation generating coil, 475 downstream side, 476 return spring, 477 buffer spring, 500 wash water, 510 hollow conical water discharge, 520 granulated water flow, 530 straight flow, 800 toilet bowl, 801 bowl, 910a , 920a Cylinder, 910b, 920b Piston, 910c, 920c O-ring, 910d, 920d Pressurizing chamber, 910e, 920e Washing water inlet, 910f, 920f Umbrella packing, 910g, 920g Washing water outlet, 911 Motor, 912 and 913 gear, 914 and 924 crankshaft, 915, 925 piston holder

Claims (3)

A sanitary washing device that discharges washing water into a predetermined area from a nozzle hole, and causes the washing water to land on the human body part,
By filling the hollow portion of the wash water discharged in a hollow conical shape with a water flow obtained by crushing and granulating the wash water after being discharged from the water discharge hole in the predetermined region, Water discharge means for spreading the washing water uniformly on the inside and landing on the human body local part,
At the outer peripheral edge of the predetermined region , water discharge is performed so as to diffuse into the hollow conical shape from the water discharge hole , thereby forming a water discharge critical region that prevents the washing water from splashing outside the region. And a water discharge critical region forming means for discharging the washing water so as to maintain the water discharge critical region until the water hits the human body part,
A sanitary washing device characterized by comprising:   The landing force when the washing water forming the critical water discharge area lands is greater than or equal to the landing force when the washing water in the center of the region lands. The sanitary washing device described. The wash water that spreads uniformly inside the area is granular,
The sanitary washing apparatus according to claim 1 or 2, wherein the washing water forming the critical water discharge area is granular having a diameter larger than that of the washing water that uniformly spreads inside the area.