JP2021143460A - Private part washing device - Google Patents

Abstract

To provide a down-sized private part washing device with a small accumulation allowance.SOLUTION: A nozzle unit of a private part washing device has a screw shaft with a spiral groove formed on an outer peripheral surface, a motor rotating the screw shaft, a nozzle having a sliding member at a rear end, and a cover covering at least a part of the outer peripheral surface of the nozzle. The nozzle advances/retreats following the rotation of the screw shaft by engagement of the sliding member with the spiral groove of the screw shaft. The cover has a pair of guide walls facing each other with a prescribed interval and extending in the advancing/retreating direction of the nozzle, and in a state of the sliding member engaged therewith, restricting rotation of the nozzle and slidably guiding the sliding member. The screw shaft is arranged between the pair of guide walls.SELECTED DRAWING: Figure 5

Description

The present invention relates to a local cleaning device.

Conventionally, as this type of local cleaning device, a cylindrical cylinder in which a spiral groove is formed on the inner peripheral surface and both ends are opened, a case that surrounds the cylinder and rotatably supports the cylinder, and a rear of the cylinder. It has an external tooth gear provided at the end so as to rotate coaxially and integrally with the cylinder, a motor that rotates the external tooth gear, and a nozzle hole that is surrounded by the cylinder and ejects wash water at the tip and at the rear end. It has been proposed that the cylinder is provided with a nozzle in which a ball fitted with a spiral groove of a cylinder is held so as to be rollable (see, for example, Patent Document 1). The nozzle rotates the external tooth gear by a motor to rotate the cylinder, and the ball moves relative to each other along the spiral groove to move back and forth.

Japanese Unexamined Patent Publication No. 2019-148806

Since the above-mentioned local cleaning device is composed of a nozzle, a cylinder surrounding the nozzle, and a case surrounding the cylinder, the stacking tolerance becomes large and manufacturing becomes difficult. In addition, the physique of the case has to be increased, and the entire device becomes large.

A main object of the local cleaning device of the present invention is to provide a local cleaning device capable of reducing the stacking tolerance and miniaturization.

The local cleaning apparatus of the present invention has adopted the following means in order to achieve the above-mentioned main object.

The local cleaning device of the present invention
A local cleaning device equipped with a nozzle unit for cleaning a local part of the human body.
The nozzle unit is
A screw shaft with a spiral groove on the outer peripheral surface,
A motor that rotates the screw shaft and
A slide member that is arranged parallel to the screw shaft, has a ejection hole for ejecting wash water at the tip portion, and fits into the spiral groove of the screw shaft at the rear end portion to advance and retreat as the screw shaft rotates. With a nozzle with
A cover that covers at least a part of the outer peripheral surface of the nozzle,
With
The covers face each other at a predetermined interval and extend along the advancing / retreating direction of the nozzle, and the slide member can be slidable while restricting the rotation of the nozzle in a state where the slide member is fitted. Has a pair of guide walls to guide the
The screw shaft is arranged between the pair of guide walls.
The gist is that.

The nozzle unit included in the local cleaning device of the present invention includes a screw shaft having a spiral groove formed on the outer peripheral surface, a motor for rotating the screw shaft, and a nozzle arranged parallel to the screw shaft and having a slide member at the rear end. And a cover that covers at least a part of the outer peripheral surface of the nozzle. The nozzle moves forward and backward as the slide member fits into the spiral groove of the screw shaft and moves forward and backward as the screw shaft rotates. The covers face each other at a predetermined interval and extend along the advancing / retreating direction of the nozzle, and the slide member is slidably guided while restricting the rotation of the nozzle while the slide member is fitted. Has a guide wall. The screw shaft is arranged between the pair of guide walls. Since the nozzle and the screw shaft are arranged in parallel, the nozzle is surrounded by a cylinder having a spiral groove formed on the inner peripheral surface, and a fitting portion for fitting with the spiral groove is provided at the rear end of the nozzle. Therefore, the stacking tolerance can be reduced. Further, since the screw shaft is arranged between the pair of guide walls, it is not necessary to separately provide a space for arranging the screw shaft, and the device can be miniaturized. As a result, it is possible to obtain a local cleaning device capable of reducing the stacking tolerance and miniaturization.

In such a local cleaning device of the present invention, the slide member may have a screw hole through which the screw shaft penetrates and is screwed. In this way, the slide member can be moved forward and backward more smoothly.

Further, in the local cleaning device of the present invention, the nozzle is a tubular body including a flat surface and a curved surface in the circumferential direction, and the screw shaft may be arranged on the flat surface side of the nozzle. .. In this way, the entire device can be further miniaturized.

Further, in the local cleaning device of the present invention, the screw shaft may be arranged below the nozzle. In this way, when the two nozzles are arranged side by side in the left-right direction to form the local cleaning device, the screw shafts do not interfere with each other in the left-right direction, so that the two nozzles can be arranged close to each other in parallel.

Further, in the local cleaning device of the present invention, the nozzle is arranged so as to be inclined diagonally downward toward the front, and the cover is configured to cover at least the bottom surface of the nozzle, and at the tip portion, inside. It may have a drain hole for draining the invaded water. In this way, the water that has entered the inside of the cover can be effectively discharged.

It is an external perspective view of the toilet bowl to which the sanitary washing toilet seat device including the local washing device of this embodiment is attached. It is external perspective view of the nozzle unit included in a local cleaning apparatus. It is an exploded perspective view of a nozzle unit. It is a front view of a nozzle unit. It is sectional drawing of a nozzle unit. FIG. 5 is a cross-sectional view taken along the line AA of FIG. It is an external view of the nozzle unit of a modification. It is an external view of the nozzle unit of a modification. It is an external view of the nozzle unit of a modification. It is an exploded perspective view of the nozzle unit of a modification. It is a side view of the nozzle of FIG. FIG. 11 is a cross-sectional view taken along the line BB of FIG. It is sectional drawing of the nozzle of the modification.

A mode for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is an external perspective view of a toilet bowl to which a sanitary cleaning toilet seat device including the local cleaning device of the present embodiment is attached, FIG. 2 is an external perspective view of a nozzle unit included in the local cleaning device, and FIG. 3 is a nozzle. It is an exploded perspective view of the unit, FIG. 4 is a front view of the nozzle unit, FIG. 5 is a sectional view of the nozzle unit, and FIG. 6 is a sectional view taken along the line AA of FIG. The toilet bowl 1 is a Western-style toilet bowl, and a sanitary washing toilet seat device 10 is installed on the upper surface of the toilet bowl 1. As shown in FIG. 1, the sanitary washing toilet seat device 10 is rotated around the toilet seat device main body 12 installed behind the toilet bowl 1, the toilet seat 14 rotatably supported by the toilet seat device main body 12, and the toilet seat device main body 12. A toilet lid 16 that is movably supported and an operation panel 18 that is operated by the user are provided.

The toilet seat device main body 12 includes a washing water flow path connected to a water supply pipe (water pipe), a water stop valve, a heat exchange unit, a pulsating pump for adjusting the washing strength, and a nozzle unit 20 for ejecting washing water (see FIG. 2). ), Local cleaning devices including switching valves, etc., which are housed in a resin housing. The heat exchange unit is provided with a water tank, a heater, and a temperature sensor, and the water from the water supply pipe is heated by the heater.

Further, the toilet seat device main body 12 includes a control device (not shown) that controls the sanitary washing toilet seat device 10. The control device controls the heater, the pulsation pump, the nozzle unit 20, and the switching valve in the water tank based on the signals from the operation panel 18, the seating sensor 13 (see FIG. 1), the temperature sensor of the water tank, and the like. Although not shown, the operation panel 18 indicates a cleaning switch for the buttocks that instructs the cleaning of the buttocks, a cleaning switch for the bidet that instructs the cleaning of the bidet, a cleaning strength adjustment switch for adjusting the strength of the cleaning, and an instruction to stop the cleaning. A stop switch or the like is provided.

As shown in FIG. 3, the nozzle unit 20 includes a nozzle 30, a motor 40, a screw shaft 45, a cover 50, and the like.

The nozzle 30 is arranged so as to be inclined diagonally downward with respect to the center of the toilet bowl 1, and moves back and forth between the cleaning position and the accommodating position, and at the cleaning position, the cleaning water is locally applied to the human body seated on the toilet seat 14. Is configured to be able to spout. The nozzle 30 has a cylindrical nozzle body 31 in which the rear end is opened and two nozzle holes 31a and 31b are formed in the tip portion, and a slide member 35 fixed to the rear end portion of the nozzle body 31. Be prepared. In the present embodiment, the nozzle hole 31a is configured as a nozzle hole for cleaning the buttocks, and the nozzle hole 31b is configured as a nozzle hole for cleaning the bidet. As shown in FIG. 3, two wash water pipes 32a and 32b are provided inside the nozzle body 31. One end of the wash water pipe 32a is communicated with the nozzle hole 31a, and the water supply pipe 33a connected to the switching valve is watertight and moves relative to the other end of the wash water pipe 32a as the nozzle body 31 moves forward and backward. It has been inserted. Further, one end of the washing water pipe 32b is communicated with the nozzle hole 31b, and the water supply pipe 33b connected to the switching valve is watertight and moves relative to the other end of the washing water pipe 32b as the nozzle body 31 moves forward and backward. It is inserted like this. The switching valve switches whether to eject the washing water supply destination of the washing water flow path downstream from the pulsating pump from a plurality of nozzle holes 31a or 31b. For example, the switching valve is configured as a rotary valve driven by a motor. Will be done.

Further, as shown in FIG. 4, the nozzle body 31 is a cylindrical body having a non-circular (substantially semicircular) cross section in which the bottom surface is formed by a flat surface and the upper surface and the side surface are formed by a curved surface. It is configured as. In the present embodiment, the upper surface of the nozzle body 31 is formed by a curved surface having a radius of curvature larger than that of the side surface. The upper surface of the nozzle body 31 may be formed by a curved surface having the same radius of curvature as the side surface thereof, or may be formed by a flat surface. On the bottom surface side of the nozzle body 31, that is, below the nozzle body 31, a screw shaft 45 having one or a plurality of thread grooves (spiral grooves) on the outer peripheral surface is arranged in parallel with the nozzle body 31 (see FIG. 5). ).

As shown in FIG. 5, the slide member 35 is fixed to the nozzle body 31 so as to project downward at the rear end of the nozzle body 31. As shown in FIG. 6, the slide member 35 has a screw hole 35a having a thread formed on the inner peripheral surface so as to penetrate and screw the screw shaft 45 into the screw groove of the screw shaft 45. As the screw shaft 45 rotates, it moves forward and backward along the extending direction of the screw shaft 45. Since the slide member 35 is fixed to the nozzle body 31, the nozzle body 31 moves back and forth as the slide member 35 moves forward and backward.

The motor 40 rotates and drives the screw shaft 45, and is fixed to the cover 50 (lower cover 52). As shown in FIG. 5, the rotating shaft 40a of the motor 40 is arranged in parallel with the screw shaft 45, and the drive gear 41 is fixed to the rotating shaft 40a. The drive gear 41 meshes with a rotary gear 42 coaxially fixed to the other end of the screw shaft 45. As a result, the screw shaft 45 is rotated by the motor 40.

The cover 50 has an upper cover 51, a lower cover 52, and a rear cover 53 as shown in FIG. 3, which surrounds the nozzle 30 and supports the nozzle 30 so as to be able to advance and retreat. The upper cover 51 and the lower cover 52 are semi-cylindrical members, and are formed in a cylindrical shape by overlapping and engaging the end faces in the circumferential direction. The lower cover 52 is formed with a mounting hole 52a to which a bearing member 61 for rotatably supporting one end 45a of the screw shaft 45 is attached, and the rear cover 53 rotatably supports the other end 45b of the screw shaft 45. A mounting hole 53a to which the bearing member 62 is mounted is formed. As a result, the screw shaft 45 is rotatably supported by the lower cover 52 and the rear cover 53 via the bearing members 61 and 62.

As shown in FIGS. 5 and 6, a guide groove 521 that guides the advancing / retreating movement of the slide member 35 is formed at the bottom of the lower cover 52. In the present embodiment, the guide groove 521 is a recess extending along the advancing / retreating direction of the nozzle 30, and the slide member 35 is slidably fitted in the pair of side walls 521a and 521b. As a result, the guide groove 521 guides the nozzle 30 in an advancing and retreating manner while restricting the rotation of the nozzle 30. Further, as shown in FIG. 5, a drain hole (opening) 521c for discharging the water that has entered the cover 50 (lower cover 52) to the outside of the cover 50 is formed at the tip of the lower cover 52. ..

Further, as described above, the nozzle body 31 has a flat bottom surface, and the screw shaft 45 is housed in the guide groove 521 formed in the lower cover 52 that covers the bottom surface side of the nozzle body 31. That is, the screw shaft 45 is arranged between the pair of side walls 521a and 521b of the guide groove 521. As a result, it is possible to secure a sufficient space for accommodating the screw shaft 45 in the guide groove 521 of the lower cover 52 without increasing the size of the lower cover 52, so that the nozzle unit 20 can be made more compact. can.

Next, the operation of the sanitary washing toilet seat device 10 (nozzle unit 20 of the local washing device) of the present embodiment configured in this way will be described. When the control device of the sanitary washing toilet seat device 10 determines that the user is seated on the toilet seat 14 by the seating sensor 13 and determines that the washing switch for the back of the operation panel 18 is pressed, the drive gear is determined by the motor 40. The rotary gear 42 that meshes with 41 is rotated to rotate the screw shaft 45. When the screw shaft 45 rotates, the slide member 35 (screw hole 35a) fixed to the nozzle body 31 moves relatively along the spiral groove formed on the outer peripheral surface of the screw shaft 45, and the nozzle 30 is used for cleaning the tail. Advance toward the cleaning position of. When the nozzle 30 reaches the cleaning position, the control device controls the switching valve (motor) so that the cleaning water from the pulsating pump is supplied to the nozzle hole 31a of the nozzle 30 via the water supply pipe 33a. As a result, washing water is ejected from the nozzle hole 31a toward the anus of the human body, and the buttocks washing is started. When the stop switch on the operation panel 18 is pressed and the control device is instructed to stop the buttocks washing, the control device stops the water supply to the nozzle 30. Then, the rotary gear 42 is rotated in the reverse direction by the motor 40, the nozzle 30 is retracted toward the accommodation position, and the nozzle 30 is accommodated in the cover 50.

Further, when the control device determines that the user is seated on the toilet seat 14 by the seating sensor 13 and determines that the bidet cleaning switch on the operation panel 18 is pressed, the control device engages with the drive gear 41 by the motor 40. The rotary gear 42 is rotated to advance the nozzle 30 toward the cleaning position for bidet cleaning. When the nozzle 30 reaches the cleaning position, the control device controls the switching valve (motor) so that the cleaning water from the pulsating pump is supplied to the nozzle hole 31b of the nozzle 30 via the water supply pipe 33b. As a result, the cleaning water is ejected from the nozzle hole 31b toward the bidet portion of the human body, and the bidet cleaning is started. When the stop switch on the operation panel 18 is pressed and the bidet cleaning is instructed to be stopped, the control device stops the water supply to the nozzle 30. Then, the rotary gear 42 is rotated in the reverse direction by the motor 40, the nozzle 30 is retracted toward the accommodation position, and the nozzle 30 is accommodated in the cover 50.

In the local cleaning device of the present embodiment described above, the screw shaft 45 having a spiral groove formed on the outer peripheral surface, the motor 40 for rotating the screw shaft 45, and the slide member arranged in parallel with the screw shaft 45 at the rear end portion. It has a nozzle 30 having 35 and a cover 50 surrounding the nozzle 30, and the slide member 35 fits into the spiral groove of the screw shaft 45 and moves back and forth with the rotation of the screw shaft 45. By doing so, you can move forward and backward. The covers 50 face each other at a predetermined interval and extend along the advancing / retreating direction of the nozzle 30, and the slide member 35 can be slidable while restricting the rotation of the nozzle 30 in a state where the slide member 35 is fitted. It has a guide groove 521 that guides the nozzle. The screw shaft 45 is arranged between the pair of side walls 521a and 521b in the guide groove 521. Since the nozzle 30 and the screw shaft 45 are arranged in parallel, the nozzle is surrounded by a cylinder having a spiral groove formed on the inner peripheral surface, and a fitting portion for fitting with the spiral groove is provided at the rear end of the nozzle. In comparison, the stacking tolerance can be reduced. Further, since the screw shaft 45 is housed in the guide groove 521, it is not necessary to separately provide a space for accommodating the screw shaft 45, and the device can be miniaturized. As a result, it is possible to obtain a local cleaning device capable of reducing the stacking tolerance and miniaturization.

In the above-described embodiment, the nozzle body 31 is formed in a cylindrical shape including a flat surface and a curved surface in the circumferential direction, but may be formed in a cylindrical shape.

In the above-described embodiment, the plurality of nozzle holes 31a and 31b of the nozzle 30 of the nozzle unit 20 are used for the buttocks cleaning and the bidet cleaning, respectively, but they are used for the buttocks powerful cleaning and the buttocks mild cleaning, respectively. You may. Further, as shown in the nozzle unit 120 of the modified example of FIG. 7, a plurality of nozzles 30 having different uses may be arranged side by side. In this case, as in the nozzle unit 20 of the embodiment, by arranging the screw shaft and the motor for rotating the screw shaft below the nozzle body, the cover of each nozzle can be shared, and the nozzle unit 120 can be shared. The manufacturing cost can be further reduced. Further, when the two nozzles 30 are arranged side by side, the screw shaft and the motor do not interfere with each other in the left-right direction, so that the two nozzles 30 can be brought close to each other in parallel. As a result, the nozzle unit 120 can be made compact in the left-right direction, and the direction in which the washing water is ejected from the nozzle 30 can be made appropriate.

In the above-described embodiment, the nozzle 30 is inclined obliquely downward toward the center of the toilet bowl 1, and the lower cover 52 is formed with a drainage hole 521c that opens at the tip thereof. It may not have.

In the above-described embodiment, the guide groove 521 is formed by recesses extending along the advancing / retreating direction of the nozzle 30, but the nozzle 30 is opposed to each other at a predetermined interval, for example, a pair of rails. It suffices if it is provided with a pair of guide walls extending along the advancing / retreating direction of.

In the above-described embodiment, the slide member 35 has a screw hole 35a through which the screw shaft 45 is threaded and screwed. Anything may be used as long as it can move relative to the spiral groove as it rotates.

In the above-described embodiment, the cover 50 includes the upper cover 51 and the lower cover 52 so as to surround the outer peripheral surface of the nozzle 30, but as shown in the nozzle unit 210 of the modified example of FIG. 8, the upper cover 50 is provided. The cover 51 may not be provided.

In the above-described embodiment, the screw shaft 45 is arranged below the nozzle 30, but as shown in the nozzle unit 320 of the modified example of FIG. 9, the screw shaft 45 is adjacent to the nozzle 30 in the left-right direction. It may be arranged. Further, the screw shaft 45 may be arranged so as to be adjacent to the nozzle 30 upward.

In the above-described embodiment, one end of the nozzle body 31 communicates with the nozzle holes 31a and 31b, and the water supply pipes 33a and 33b connected to the switching valve from the other end side are watertightly inserted into the cleaning water pipes 32a and 32b. It was supposed to be equipped with. However, as shown in the nozzle unit 420 of the modified example of FIG. 10, the nozzle 430 receives the cleaning water via the water supply hoses 432a and 432b connected to the switching valve and ejects the nozzle 430 from the nozzle holes 431a and 431b. It may be configured in. As shown in FIGS. 10 to 12, the nozzle 430 includes a nozzle body 431, water supply hoses 432a and 432b, a joint 433, and a water stopcock 437. An inner cylinder 435 is inserted inside the nozzle body 431. The space surrounded by the inner peripheral surface of the inner cylinder 435 forms a cleaning water flow path 436a that guides the cleaning water supplied from the water supply hose 432a to the nozzle hole 431a, and forms an inner peripheral surface of the nozzle body 431 and an outer peripheral surface of the inner cylinder 435. The space surrounded by the water supply hose 432b forms an annular washing water flow path 436b that guides the washing water supplied from the water supply hose 432b to the nozzle hole 431b. One ends of the water supply hoses 432a and 432b are connected to the joint 433, and inside the joint 433, the water supply channels 434a for supplying the wash water from the water supply hoses 432a and 432b to the corresponding wash water flow paths 436a and 436b, 434b is formed. The stopcock 437 is attached to the rear end of the nozzle body 431 to allow the flow of wash water from the water supply channel 434a to the wash water flow path 436a, and also allows the flow of wash water from the water supply channel 434b to the wash water flow path 436a. proclaim. As shown in FIG. 10, the cover (upper cover 451) covering the nozzle body 431 exposes the joint 433 from the cover and extends in the advancing / retreating direction so that the joint 433 advances / retreats as the nozzle body 431 advances / retreats. An existing opening 451 is formed. In the modified nozzle 430, the nozzle body 431 is provided with two nozzle holes 431a and 431b, but may be provided with only one nozzle hole. In this case, as shown in FIG. 13, one cleaning water flow path 1436 for guiding the cleaning water to the nozzle hole is formed inside the nozzle body 1431, and the rear end of the nozzle body 1431 is provided with an opening at the rear end. A water stopcock 1437 is attached so as to close it. Further, one water supply hose (not shown) connected to the switching valve is connected to the joint 1433, and the cleaning water from the one water supply hose is guided to the cleaning water flow path 1436 of the nozzle body 1431 inside the joint 1433. One water supply channel 1434 is formed.

The correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem will be described. In the embodiment, the nozzle units 20, 120, 220, 320, 420 correspond to the "nozzle unit", the screw shaft 45 corresponds to the "screw shaft", the slide member 35 corresponds to the "slide member", and the nozzle 30 Corresponds to the "nozzle", the cover 50 (upper cover 51, lower cover 52) corresponds to the "cover", and the pair of side walls 521a and 521b of the guide groove 521 correspond to the "pair of guide walls". Further, the screw hole 35a corresponds to the "screw hole". Further, the drainage hole 521c corresponds to the "drainage hole".

Regarding the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem, the invention described in the column of means for the embodiment to solve the problem is carried out. Since it is an example for specifically explaining the form for solving the problem, the elements of the invention described in the column of means for solving the problem are not limited. That is, the interpretation of the invention described in the column of means for solving the problem should be performed based on the description in the column, and the embodiment is the invention described in the column of means for solving the problem. It is just a concrete example.

Although the embodiments for carrying out the present invention have been described above using the embodiments, the present invention is not limited to these embodiments, and various embodiments are used without departing from the gist of the present invention. Of course, it can be done.

The present invention can be used in the manufacturing industry of local cleaning equipment and the like.

1 toilet bowl, 10 sanitary cleaning toilet seat device, 12 toilet seat device body, 13 seating sensor, 14 toilet seat, 16 toilet lid, 18 operation panel, 20,120,220,320,420 nozzle unit, 30,430 nozzle, 31,431 nozzle Main body, 31a, 31b, 431a, 431b Nozzle hole, 32a, 32b Washing water pipe, 33a, 33b Water supply pipe, 35 slide member, 35a screw hole, 40 motor, 40a rotary shaft, 41 drive gear, 42 rotary gear, 45 screw Shaft, 45a one end, 45b other end, 50 cover, 51 top cover, 52 bottom cover, 52a mounting hole, 53 rear cover, 53a mounting hole, 61,62 bearing member, 432a, 432b water supply hose, 433, 1433 fitting, 434a , 434b, 1434 Water supply channel, 435 inner cylinder, 436a, 436b, 1436 Washing water flow path, 437, 1437 Water stopcock, 521 guide groove, 521a, 521b Side wall, 521c drain hole.

Claims (5)

A local cleaning device equipped with a nozzle unit for cleaning a local part of the human body.
The nozzle unit is
A screw shaft with a spiral groove on the outer peripheral surface,
A motor that rotates the screw shaft and
A slide member that is arranged parallel to the screw shaft, has a ejection hole for ejecting wash water at the tip portion, and fits into the spiral groove of the screw shaft at the rear end portion to advance and retreat as the screw shaft rotates. With a nozzle with
A cover that covers at least a part of the outer peripheral surface of the nozzle,
With
The covers face each other at a predetermined interval and extend along the advancing / retreating direction of the nozzle, and the slide member can be slidable while restricting the rotation of the nozzle in a state where the slide member is fitted. Has a pair of guide walls to guide the
The screw shaft is arranged between the pair of guide walls.
Local cleaning device. The local cleaning device according to claim 1.
The slide member is a local cleaning device having a screw hole through which the screw shaft penetrates and is screwed. The local cleaning device according to claim 1 or 2.
The nozzle is a cylindrical body including a flat surface and a curved surface in the circumferential direction.
The screw shaft is arranged on the flat surface side of the nozzle.
Local cleaning device. The local cleaning device according to any one of claims 1 to 3.
The screw shaft is located below the nozzle.
Local cleaning device. The local cleaning device according to any one of claims 1 to 4.
The nozzle is arranged so as to incline diagonally downward toward the front.
The cover is configured to cover at least the bottom surface of the nozzle and has a drain hole at the tip for draining water that has entered the inside.
Local cleaning device.

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