Nozzle of a cleaner

Abstract

A suction nozzle of a cleaner according to the present invention includes a suction nozzle housing provided with a suction flow path in which dust-containing air flows, and the suction flow path includes a first flow path extending in a left-right direction and a second flow path extending from the first flow path in a front-rear direction; a water tank seated on the suction nozzle housing and storing water to be supplied to a mop; first and second rotary cleaning portions arranged apart from each other in the left-right direction from a lower side of the suction nozzle housing, and each including a rotary plate to which the mop can be attached; first driving means arranged in the suction nozzle housing and having a first driving motor for driving the first rotary cleaning portion; second driving means located in the suction nozzle housing and having a second driving motor for driving the second rotary cleaning portion; and a water outlet provided at a bottom wall of the suction nozzle housing to supply water in the water tank to each of the rotary cleaning portions.

Description

[0001] This application is a divisional application of the original case application number 201980026813.9 for an invention patent application (International application number: PCT / KR2019 / 004931, application date: 2019.04.24, invention name: suction nozzle of cleaner). TECHNICAL FIELD

[0002] The present specification relates to a suction nozzle for a cleaner. BACKGROUND

[0003] A cleaner is a device that sucks or wipes dust or foreign matter in an area that needs to be cleaned to clean it.

[0004] Such a cleaner can be classified into a manual cleaner that cleans while a user directly moves the cleaner and an automatic cleaner that cleans while self-propelling.

[0005] The manual cleaner can be classified into a canister cleaner, an upright cleaner, a hand-held cleaner, and a stick cleaner according to the type of the cleaner.

[0006] These cleaners can clean a floor using a suction nozzle. In general, the suction nozzle can be used to suck air and dust. According to the type of the suction nozzle, the suction nozzle can be attached with a mop so as to clean the floor with the mop.

[0007] Korean Patent Registration 10-0405244 of the prior art 1 discloses a suction assembly for a vacuum cleaner.

[0008] The suction port assembly of the prior art 1 includes a suction port body provided with a suction port.

[0009] The suction port body includes a first suction path of a front portion, a second suction path of a rear portion, and a guide path formed between the first suction path and the second suction path.

[0010] A mop is rotatably installed on a lower end of the suction port body, and a rotary driving unit for driving the mop is provided on the inside of the suction port body.

[0011] The rotary driving unit includes one rotary motor and a plurality of gears for transmitting power of one rotary motor to a plurality of rotors attached with the mop.

[0012] According to the prior art 1, since a pair of rotors arranged on both left and right sides are rotated by using one rotary motor, if the rotary motor malfunctions or fails, there is a problem that the pair of rotors cannot all be rotated.

[0013] In addition, in order to rotate a pair of rotors using one rotary motor, since the rotary motor is positioned at the center of the suction port body, it is necessary to design a suction path that prevents interference with the rotary motor, and thus there are disadvantages in that the length of the suction path is lengthened and the structure forming the suction path is complicated.

[0014] In addition, since the prior art 1 does not have a structure for supplying water to the mop, in the case where it is desired to clean using a mop with water, there is a disadvantage in that the user must directly supply water to the mop.

[0015] In addition, in the case of the prior art 1, since the rotary motor is positioned at the central portion of the suction port body, it is difficult to form a suction path in the central portion of the suction port body, and if a suction path is formed in the central portion of the suction port body, there is a disadvantage in that the height of the suction port body is increased. In the case where the height of the suction port body is increased, there are disadvantages in that the suction port body does not easily enter under furniture or a narrow space, thereby reducing the cleanable area, and the size of the suction port body is overall increased, and thus there is a disadvantage in that the user is inconvenienced when operating.

[0016] For example, in the case where the user intends to straighten the suction port body but the suction port body is eccentrically moved, there is a disadvantage in that the amount of eccentricity is further increased due to the weight of the suction port body, and thus it is difficult for the user to overcome the eccentricity and move the suction port body back to the original straight path.

[0017] Meanwhile, Korean Patent Registration No. 10-1796646, which is the prior art 2, discloses a steam cleaner.

[0018] The steam cleaner disclosed in the prior art 2 includes a cleaner body, a handle connected to the cleaner body, a water bottle, a steam generation unit, a steam spraying unit, a steam supply path, a mop rotating unit, and a handle angle adjusting device for supporting the handle on the cleaner body at an adjustable angle.

[0019] The mop rotating unit is rotatably installed at the lower portion of the cleaner body.

[0020] The steam spraying unit is installed to protrude from the lower body of the cleaner body. The steam spraying unit is formed in an arc shape, and a plurality of spray ports are formed in a circumferential direction.

[0021] However, according to the steam cleaner disclosed in the prior art 2, since steam is supplied to the mop attached to the lower side of the mop rotating unit, it is possible to wipe the floor using the mop, but there is a disadvantage in that it is not possible to remove dust by suctioning the dust on the floor.

[0022] In addition, in the case of combining with the structure of the prior art 1, a structure that supplies steam to the mop of the prior art 1 can be derived, but, because a plurality of spray ports are disposed in the circumferential direction of the steam spraying unit, there is a problem that steam discharged from a part of the plurality of spray ports is not supplied to the mop, but flows into the suction flow path. SUMMARY

[0023] Technical problem

[0024] The present embodiment provides a suction nozzle of a vacuum cleaner in which water discharged from a water discharge port is prevented from flowing into a suction flow path.

[0025] The present embodiment provides a suction nozzle of a vacuum cleaner in which water is prevented from flowing radially outward of a rotating plate before passing through a water passage hole of the rotating plate.

[0026] The present embodiment provides a suction nozzle for a cleaner in which water passing through a rotating plate is prevented from leaking into a gap between the rotating plate and a mop.

[0027] The present embodiment provides a suction nozzle for a cleaner in which water discharged from a water discharge port is prevented from flowing in the direction of a drive device transmission axis.

[0028] The present embodiment provides a suction nozzle for a cleaner in which water discharged from a water discharge port is prevented from flowing in the direction of a drive device transmission axis.

[0029] Technical scheme

[0030] A suction nozzle for a cleaner according to an aspect includes: a suction nozzle housing including a suction flow path through which dust-containing air flows, and the suction flow path including a first flow path extending in a lateral direction and a second flow path extending from the first flow path in a front-rear direction; a water tank disposed on the suction nozzle housing and configured to store water to be supplied to a mop; first and second rotary cleaning units arranged on a lower side of the suction nozzle housing to be spaced apart from each other in the lateral direction, each including a rotary plate to which the mop is attachable; first driving means arranged in the suction nozzle housing and including a first driving motor configured to drive the first rotary cleaning unit; second driving means arranged in the suction nozzle housing and including a second driving motor configured to drive the second rotary cleaning unit; and a water discharge outlet provided at a bottom of the suction nozzle housing and configured to supply water in the water tank to each of the first and second rotary cleaning units.

[0031] Each of the rotary plates includes a plurality of water passing holes spaced apart from each other in a circumferential direction with respect to a rotation center.

[0032] A horizontal distance between a center line of the second flow path and the water discharge outlet is longer than a horizontal distance between the center line of the second flow path and a rotation center of the rotary plate.

[0033] When a line connecting a center line of the first flow path and a rotation center of each of the rotary plates and being perpendicular to the center line of the first flow path is referred to as a connecting line, the water discharge outlet can be opposite to an axis of the driving motor with respect to the connecting line.

[0034] The axis of the driving motor can be located between the connecting line and the center line of the second flow path.

[0035] A distance between the center line of the first flow path and the water discharge outlet can be shorter than a distance between the center line of the first flow path and the rotation center of the rotary plate.

[0036] The rotary plate can include an outer body of a ring shape, an inner body spaced apart from an inner circumferential surface of the outer body in an inner region of the outer body, and a connecting rib connecting the inner body and the outer body.

[0037] An annular water blocking rib extending in a circumferential direction can be formed on an upper surface of the outer body. The plurality of water passing holes can be located in an inner region of the water blocking rib.

[0038] An inclined surface inclined downward can be formed on both sides of the connection rib.

[0039] A bottom rib having a ring shape can protrude from a bottom of the mouthpiece housing. A center of the bottom rib can coincide with a center of the water blocking rib.

[0040] A diameter of the bottom rib can be greater than a diameter of the water blocking rib.

[0041] The rotating plate can further include a contact rib protruding downward at a lower surface of the outer body and arranged outside the plurality of water passing holes in a radial direction.

[0042] The contact rib can form a ring shape.

[0043] 5A protruding sleeve can be formed on a bottom of the mouthpiece housing. A groove portion having a recessed form in which the protruding sleeve is received can be formed at the inner body.

[0044] A central portion of the inner body can be provided with a shaft coupling portion configured to be coupled with the driving device. The protruding sleeve can surround the shaft coupling portion.

[0045] A groove having an upward recessed form to position the water discharge outlet can be formed on a bottom wall of the mouthpiece housing. A hole configured to allow the water discharge outlet to pass through can be formed in the groove, and at least a portion of the water discharge outlet passing through the hole in the mouthpiece housing can be positioned in the groove.

[0046] A lower end of the water discharge outlet can be positioned lower than a bottom of the mouthpiece housing.

[0047] The water discharge outlet can protrude from a bottom of the mouthpiece housing after passing through the hole of the mouthpiece housing.

[0048] A lower end of the water discharge outlet can be positioned higher than an upper surface of the rotating plate.

[0049] 5The mouthpiece can further include a water supply flow path configured to guide water in a water tank to a water discharge outlet. The water tank can include a tank body including a chamber to store water and a tank discharge outlet to discharge water therein, and a valve including an opening and closing unit to open and close the tank discharge outlet in the tank body.

[0050] The mouthpiece housing can include a valve operation unit to operate the opening and closing unit such that the opening and closing unit opens the tank discharge outlet in a process of seating the water tank to the mouthpiece housing. The water supply flow path can be connected to the valve operation unit.

[0051] The water supply flow path can include a supply pipe through which water discharged from the water tank flows, a connector connected to the supply pipe, a first branch pipe connected to the connector and configured to supply water to the first rotary washing unit, and a second branch pipe connected to the connector and configured to supply water to the second rotary washing unit.

[0052] The suction nozzle can further include a water pump configured to control water supply in the water supply flow path, and a pump motor connected to the water pump.

[0053] The supply pipe can include a first supply pipe connected to an inlet of the water pump, and a second supply pipe connected to an outlet of the water pump and the connector.

[0054] The connector can be positioned directly above the second flow path.

[0055] The suction nozzle of the present embodiment can be used in connection with a hand-held cleaner, an extension pipe connected to a hand-held cleaner, or an extension pipe of a canister cleaner.

[0056] The suction nozzle can further include a connection pipe connected to the suction nozzle housing, guiding air in the suction flow path to the cleaner, and having a power reception terminal for receiving power from the cleaner.

[0057] The connection pipe can be rotatably connected to the suction nozzle housing.

[0058] Beneficial effects

[0059] According to the present embodiment, because the horizontal distance between the center line of the second flow path and the water discharge outlet is longer than the horizontal distance between the center line of the second flow path extending in the front-rear direction and the rotation center of the rotary plate, water discharged from the water discharge outlet can be prevented from flowing into the suction flow path.

[0060] Further, according to the present embodiment, water can be prevented from flowing radially outward before passing through the water passage holes of the rotary plate by the water-blocking ribs on the upper side of the rotary plate.

[0061] In addition, according to the present embodiment, because the contact ribs for contact with the mop are provided below the rotary plate, water passing through the rotary plate can be prevented from leaking into the gap between the rotary plate and the mop.

[0062] In addition, according to the present embodiment, the protruding sleeve protruding from the suction nozzle housing is arranged to surround the transmission shaft of the driving device, and the protruding sleeve is received in the groove portion formed in the rotary plate, so that water discharged from the water discharge outlet can be prevented from flowing in the direction of the transmission shaft of the driving device.

[0063] In addition, according to the present application, because the lower end of the water discharge outlet is positioned at a lower position than the bottom of the nozzle housing, the distance between the lower end of the water discharge outlet and the rotating plate is reduced, so that even if the water discharged from the water discharge outlet hits the rotating plate, the phenomenon of water splashing to the bottom of the nozzle housing can be minimized. BRIEF DESCRIPTION OF DRAWINGS

[0064] Figure 1 and Figure 2 is a perspective view illustrating a nozzle for a cleaner according to an embodiment of the present application.

[0065] Figure 3 is a bottom view illustrating a nozzle for a cleaner according to an embodiment of the present application.

[0066] Figure 4 is a perspective view illustrating a nozzle for a cleaner according to an embodiment of the present application, viewed from the rear side. Figure 1

[0067] Figure 5 is a sectional view taken along line A-A of Figure 1 .

[0068] Figure 6 and Figure 7 is an exploded perspective view illustrating a nozzle according to an embodiment of the present application.

[0069] Figure 8 and Figure 9 is a perspective view illustrating a water tank according to an embodiment of the present application.

[0070] Figure 10 is a sectional view taken along line B-B of Figure 8 .

[0071] Figure 11 is a sectional view taken along line C-C of Figure 8 .

[0072] Figure 12 is a sectional view taken along line D-D of Figure 8 .

[0073] Figure 13 is a sectional view taken along line E-E of Figure 8 .

[0074] Figure 14 is a perspective view illustrating a nozzle cover according to an embodiment of the present application, viewed from above.

[0075] Figure 15 is a perspective view illustrating a nozzle cover according to an embodiment of the present application, viewed from below.

[0076] ​Figure 16 is a perspective view showing a state in which the operation unit, the first coupling unit, and the support body are separated from each other in the mouthpiece cover.

[0077] Figure 17 is a cross-sectional view taken along the line F-F of Figure 14 .

[0078] Figure 18 is a cross-sectional view taken along the line G-G of Figure 17 in a state in which the first coupling unit is coupled with the mouthpiece cover.

[0079] Figure 19 is a cross-sectional view showing a state in which the first coupling unit and the second coupling unit are released by pressing the operation unit.

[0080] Figure 20 is a view showing a state in which the valve operation unit and the seal are separated from each other in the mouthpiece cover according to one embodiment of the present application.

[0081] Figure 21 is a view showing a state in which the flow path forming portion is coupled with the mouthpiece base according to one embodiment of the present application.

[0082] Figure 22 is a view showing the mouthpiece base according to one embodiment of the present application as viewed from below.

[0083] Figure 23 is a view showing a plurality of switches provided on the control panel according to one embodiment of the present application.

[0084] Figure 24 is a view showing the first driving device and the second driving device according to one embodiment of the present application as viewed from below.

[0085] Figure 25 is a view showing the first driving device and the second driving device according to an embodiment of the present application as viewed from above.

[0086] Figure 26 is a view showing a structure for preventing the motor housing and the driving motor from rotating.

[0087] Figure 27 is a view showing a state in which the transmission unit is coupled with the driving motor according to one embodiment of the present application.

[0088] Figure 28 is a view showing a state in which the transmission unit is coupled with the driving motor according to another embodiment of the present application.

[0089] Figure 29is a view showing a relationship between a rotation direction of a rotation plate and an extension direction of an axis of a driving motor according to an embodiment of the present application.

[0090] Figure 30 is a plan view showing a state in which a driving device according to an embodiment of the present application is mounted on a mouthpiece base.

[0091] Figure 31 is a front view showing a state in which a driving device according to an embodiment of the present application is mounted on a mouthpiece base.

[0092] Figure 32 is a view showing a structure of a driving unit cover of a mouthpiece cover and an arrangement relationship between a rotation center of a rotation plate and a driving motor according to an embodiment of the present application.

[0093] Figure 33 is a view showing a rotation plate according to an embodiment of the present application as viewed from above.

[0094] Figure 34 is a view showing a rotation plate according to an embodiment of the present application as viewed from below.

[0095] Figure 35 is a view showing a water supply flow path supplying water of a water tank to a rotation cleaning unit according to an embodiment of the present application.

[0096] Figure 36 is a view showing a valve in a water tank according to an embodiment of the present application.

[0097] Figure 37 is a view showing a state in which the valve opens a discharge port in a state in which the water tank is mounted on a mouthpiece housing.

[0098] Figure 38 is a view showing an arrangement of a rotation plate and a mouthpiece body according to an embodiment of the present application.

[0099] Figure 39 is a view showing an arrangement of a water discharge port of a nozzle in a mouthpiece body according to an embodiment of the present application.

[0100] Figure 40 is a conceptual view showing a process of supplying water in a water tank to a rotation cleaning unit according to an embodiment of the present application.

[0101] Figure 41 is a perspective view showing a mouthpiece for a cleaner according to an embodiment of the present application separated from a connection pipe as viewed from a rear side.

[0102] Figure 42 is a view showing Figure 41a sectional view of the area 'A' in FIG. 1.

[0103] Figure 43 is a perspective view showing a gasket according to an embodiment of the present application, Figure 42 is a perspective view showing a gasket according to an embodiment of the present application, DETAILED DESCRIPTION

[0104] Hereinafter, some embodiments of the present application will be described in detail with reference to the exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are designated by the same reference numerals even though they are shown in different drawings. Further, in describing embodiments of the present application, if it is determined that the detailed description of related known configurations or functions will make the understanding of the embodiments of the present application more difficult, the detailed description thereof will be omitted.

[0105] Further, in describing constituent elements of embodiments of the present application, terms such as first, second, A, B, (a), (b) can be used. These terms are used only for the purpose of distinguishing a component from other components, and the nature, sequence, or order of a component is not limited by the terms. When a component is described as being "connected" or "coupled" with another component, the component can be directly connected with the other component, but it should be understood that another component can be "connected" or "coupled" between each component.

[0106] Figure 1 and Figure 2 is a perspective view showing a nozzle for a cleaner according to an embodiment of the present application, Figure 3 is a bottom view showing a nozzle for a cleaner according to an embodiment of the present application, Figure 4 is a perspective view showing a nozzle for a cleaner according to an embodiment of the present application, Figure 1 is a perspective view showing a nozzle for a cleaner according to an embodiment of the present application, and Figure 5 is a sectional view taken along line A-A line of Figure 1

[0107] Referring to Figures 1 to 5 , a nozzle 1 for a cleaner according to an embodiment of the present application (hereinafter, referred to as "nozzle") includes a nozzle body 10 and a connection pipe 50 connected with the nozzle body 10 to be movable.

[0108] The nozzle 1 of the present embodiment can be used in a state connected with a hand-held cleaner or a canister cleaner, for example.

[0109] A hand-held cleaner is a cleaner capable of performing cleaning while a user directly holds a handle provided in the cleaner. In general, in the case of a hand-held cleaner, a cleaner body is movable by a user while being positioned at a predetermined height with respect to a floor.

[0110] ​A canister cleaner is a cleaner capable of cleaning using a suction nozzle while a cleaner main body is placed on a floor, the cleaner main body being connected with a suction hose, a handle, and an extension pipe, the suction nozzle being connected with the extension pipe, and the handle being held.

[0111] The suction nozzle 1 of the present embodiment can be detachably connected to a hand cleaner, to an extension pipe connected with the hand cleaner, or to an extension pipe of a canister cleaner.

[0112] In other words, the suction nozzle 1 can be detachably connected to a cleaner or an extension pipe of a cleaner. Thus, when the suction nozzle is connected to the cleaner or the extension pipe of the cleaner, a user can clean a floor using the suction nozzle 1. At this time, the cleaner connected with the suction nozzle 1 can separate dust in air by a multi-cyclone separator method.

[0113] The suction nozzle 1 itself has a battery that supplies power to a power consumption unit therein, and can also operate by receiving power from a cleaner.

[0114] In order for the suction nozzle 1 to be powered by a cleaner, the suction nozzle 1 can include a power reception terminal, and the extension pipe of the cleaner or the hand cleaner itself can include a power supply terminal.

[0115] For example, the power reception terminal can be provided in the connection pipe 50, and when the connection pipe 50 is connected with the cleaner or the extension pipe of the cleaner, the power reception terminal can be connected with the power supply terminal. When the power reception terminal is connected with the power supply terminal, the suction nozzle 1 can receive power from the cleaner.

[0116] Because the cleaner to which the suction nozzle 1 is connected includes a suction motor, a suction force generated by the suction motor is applied to the suction nozzle 1 to be able to suction foreign matter and air on a floor at the suction nozzle 1. Thus, in the present embodiment, the suction nozzle 1 is capable of performing a function of suctioning foreign matter and air on a floor surface and guiding the foreign matter and air to a cleaner.

[0117] Although not limited thereto, the connection pipe 50 is connected with a rear central portion of the suction nozzle main body 10 to guide suctioned air to a cleaner.

[0118] In the present embodiment, a portion of the suction nozzle 1 connected with the connection pipe 50 is a rear side of the suction nozzle 1, and a portion of the opposite side of the connection pipe 50 is a front side of the suction nozzle 1.

[0119] Alternatively, as to Figure 3 the upper portion is a front side of the suction nozzle 1, and the lower portion is a rear portion of the suction nozzle 1.

[0120] The suction nozzle 1 can further include rotating cleaning units 40 and 41 rotatably disposed below the suction nozzle main body 10.

[0121] For example, a pair of the rotary cleaning units 40 and 41 can be arranged in the lateral direction. The pair of the rotary cleaning units 40 and 41 can be independently rotatable. For example, the suction nozzle 1 can include a first rotary cleaning unit 40 and a second rotary cleaning unit 41.

[0122] The rotary cleaning units 40 and 41 can each include a mop 402 and 404. For example, the mops 402 and 404 can be formed in a circular disc shape. The mops 402 and 404 can include a first mop 402 and a second mop 404.

[0123] The suction nozzle body 10 can include a suction nozzle housing 100 that forms an outer shape. The suction nozzle housing 100 can include suction flow paths 112 and 114 for suctioning air.

[0124] The suction flow paths 112 and 114 include a first flow path 112 that extends in the lateral direction in the suction nozzle housing 100, and a second flow path 114 that communicates with the first flow path 112 and extends in the front-rear direction.

[0125] The first flow path 112 can be formed, for example, at a front end portion of a lower surface of the suction nozzle housing 100.

[0126] The second flow path 114 can extend rearward from the first flow path 112. For example, the second flow path 114 can extend rearward from a central portion of the first flow path 112 toward the connection pipe 50.

[0127] Accordingly, a center line A1 of the first flow path 112 can extend in the lateral horizontal direction. A center line A2 of the second flow path 114 can extend in the front-rear direction and can intersect the center line A1 of the first flow path 112. However, the center line A2 of the second flow path 114 can not be horizontal, but can be inclined in the front-rear direction.

[0128] In the present embodiment, the center line A2 of the second flow path 114 can be referred to as a center line of the suction flow path in the front-rear direction.

[0129] The center line A2 of the second flow path 114 can be positioned, for example, at a position that bisects the suction nozzle body 10 left and right.

[0130] In a state in which the rotary cleaning units 40 and 41 are connected to the lower side of the suction nozzle body 10, a portion of the mops 402 and 404 protrudes to the outside of the suction nozzle 1, and thus the rotary cleaning units 40 and 41 can clean not only the floor located directly below the suction nozzle but also the floor located outside the suction nozzle 1.

[0131] For example, the mops 402 and 404 can protrude not only to both sides of the suction nozzle 1 but also to the rear portion of the suction nozzle 1.

[0132] The rotary cleaning units 40 and 41 can be positioned, for example, from below the suction nozzle body 10 at the rear side of the first flow path 112.

[0133] Therefore, when the suction nozzle 1 advances and cleaning is performed, foreign matter and air on the floor that are sucked by the first flow path 112 can be cleaned by the mops 402 and 404.

[0134] In the present embodiment, the first rotation center C1 of the first rotary cleaning unit 40 (for example, the rotation center of the rotary plate 420) and the second rotation center C2 of the second rotary cleaning unit 41 (for example, the rotation center of the rotary plate 440) are arranged in a state of being spaced apart from each other in the lateral direction.

[0135] The center line A2 of the second flow path 114 can be positioned in a region between the first rotation center C1 and the second rotation center C2.

[0136] A center axis Y that bisects the front-rear length L1 of the suction nozzle body 10 (excluding the extension portion) can be positioned in front of the rotation centers C1 and C2 of the respective rotary cleaning units 40 and 41.

[0137] The positions of the rotation centers C1 and C2 of the respective rotary cleaning units 40 and 41 can be farther from the front end portion of the suction nozzle body 10 than the center axis Y that bisects the front-rear length L1 of the suction nozzle body 10. This is to prevent the rotary cleaning units 40 and 41 from blocking the first flow path 112.

[0138] Therefore, the front-rear horizontal distance L3 between the center axis Y and the rotation centers C1 and C2 of the respective rotary cleaning units 40 and 41 can be set to a value greater than zero.

[0139] Further, the distance L2 between the rotation centers C1 and C2 of the rotary cleaning units 40 and 41 can be formed to be greater than the diameter of each of the mops 402 and 404. This is to prevent the mops 402 and 404 from interfering with each other during rotation and to prevent the area that can be cleaned from being reduced due to the interfered portion.

[0140] The diameters of the mops 402 and 404 are preferably 0.6 times or more than half the width of the suction nozzle body 10, but are not limited thereto. In this case, the cleaning area of the floor facing the suction nozzle body 10 is increased by the mops 402 and 404, and the cleaning area of the floor not facing the suction nozzle body 10 is also increased. In addition, when cleaning is performed using the suction nozzle 1, the area cleaned by the mops 402 and 404 is ensured even with a small amount of movement.

[0141] In addition, the mops 402 and 404 can be provided with a sewing line 405. The sewing line 405 can be positioned at the edge portions of the mops 402 and 404 in a state of being spaced apart inward in a central direction. The mops 402 and 404 can be combined from a plurality of fiber materials, and the fiber materials can be combined by means of the sewing line 405.

[0142] At this time, the diameters of the rotating plates 420 and 440 (to be described later) can be greater than the diameters of the portions of the sewing line 405 with respect to the centers of the mops 402 and 404. The diameters of the rotating plates 420 and 440 can be less than the outer diameters of the mops 402 and 404.

[0143] In this case, the rotating plates 420 and 440 can support the portions of the mops 402 and 404 positioned outside the sewing line 405, thereby reducing the distance between the mops 402 and 404, and can prevent mutual friction between the mops 402 and 404 or vertical overlap between the mops 402 and 404 due to deformation of the mops 402 and 404 by pressing the edge portions.

[0144] The nozzle housing 100 can include a nozzle base 110 and a nozzle cover 130 coupled to an upper side of the nozzle base 110.

[0145] The nozzle base 110 can be formed with a first flow path 112. The nozzle housing 100 can further include a flow path forming portion 150 that forms a second flow path 114 together with the nozzle base 110.

[0146] The flow path forming portion 150 can be coupled with an upper central portion of the nozzle base 110, and an end portion of the flow path forming portion 150 can be connected with the connection pipe 50.

[0147] Therefore, because the second flow path 114 can extend in a substantially linear shape in the front-rear direction by the arrangement of the flow path forming portion 150, it is possible to minimize the length of the second flow path 114, thereby minimizing the flow path loss in the nozzle 1.

[0148] A front portion of the flow path forming portion 150 can cover an upper side of the first flow path 112. The flow path forming portion 150 can be arranged to be inclined upward from the front end portion toward the rear side.

[0149] Therefore, the height of the front portion of the flow path forming portion 150 can be lower than the height of the rear portion of the flow path forming portion 150.

[0150] According to the present embodiment, because the height of the front portion of the flow path forming portion 150 is low, there is an advantage that the front portion height of the entire height of the nozzle 1 can be reduced. The lower the height of the nozzle 1, the more likely it is to be possible to draw the nozzle 1 into a narrow space of the lower side of furniture or a chair to be cleaned.

[0151] The nozzle base 110 can include an extension portion 129 for supporting the connection pipe 50. The extension portion 129 can extend rearward from a rear end of the nozzle base 110.

[0152] The connection pipe 50 can include a first connection pipe 510 connected to an end of the flow path forming portion 150, a second connection pipe 520 rotatably connected to the first connection pipe 510, and a guide pipe 530 for communicating the first connection pipe 510 with the second connection pipe 520.

[0153] The first connection pipe 510 can be seated on the extension portion 129, and the second connection pipe 520 can be connected with an extension pipe or a hose of the cleaner.

[0154] A plurality of rollers for smooth movement of the nozzle 1 can be provided on a lower side of the nozzle base 110.

[0155] For example, the first roller 124 and the second roller 126 can be positioned behind the first flow path 112 on the nozzle base 110. The first roller 124 and the second roller 126 can be spaced apart from each other in the transverse direction.

[0156] According to the present embodiment, the first roller 124 and the second roller 126 are arranged behind the first flow path 112 so that the first flow path 112 can be as close as possible to the front end portion of the nozzle base 110, thereby enabling an increase in the area that can be cleaned using the nozzle 1.

[0157] As the distance from the front end portion of the nozzle base 110 to the first flow path 112 increases, the area in front of the first flow path 112 to which suction force is not applied increases during cleaning, and thus the area that is not cleaned increases.

[0158] On the other hand, according to the present embodiment, the distance from the front end portion of the nozzle base 110 to the first flow path 112 can be minimized, and thus the cleanable area can be increased.

[0159] Further, by arranging the first roller 124 and the second roller 126 behind the first flow path 112, the length of the first flow path 112 in the transverse direction can be maximized.

[0160] In other words, the distance between the two end portions of the first flow path 112 and the two end portions of the nozzle base 110 can be minimized.

[0161] In the present embodiment, the first roller 124 can be positioned in a space between the first flow path 112 and the first mop 402. The second roller 126 can be positioned in a space between the first flow path 112 and the second mop 404.

[0162] The first roller 124 and the second roller 126 can be rotatably coupled to shafts 125, respectively. The shafts 125 can be fixed to the lower side of the nozzle base 110 in a state of being arranged to extend in the transverse direction.

[0163] The distance between the shafts 125 and the front end portion of the nozzle base 110 is longer than the distance between the front end portion of the nozzle base 110 and each mop 402 and 404 (or the rotary plate to be described later).

[0164] At least a portion of each of the rotary cleaning units 40 and 41 (mops and / or rotary plates) can be positioned between the shaft 125 of the first roller 124 and the shaft 125 of the second roller 126.

[0165] According to this arrangement, the rotary cleaning units 40 and 41 can be positioned as close as possible to the first flow path 112, and the area of the floor on which the nozzle 1 is located that is cleaned by the rotary cleaning units 40 and 41 can be increased, thereby enabling improvement in floor cleaning performance.

[0166] The number of rollers is not limited, but the nozzle 1 can be supported at three points. In other words, the plurality of rollers can further include a third roller 129a provided on the extension portion 129 of the nozzle base 110.

[0167] The third roller 129a can be positioned behind the mops 402 and 404 to prevent interference with the mops 402 and 404.

[0168] In a state in which the mops 402 and 404 are placed on the floor, the mops 402 and 404 are pressed against the floor and are in close contact with the floor, so that the frictional force between the mops 402 and 404 and the bottom surface is increased. In the present embodiment, since the plurality of rollers are coupled to the lower side of the nozzle base 110, the mobility of the nozzle 1 can be improved by the plurality of rollers.

[0169] Meanwhile, the nozzle main body 10 can further include a water tank 200 to supply water to the mops 402 and 404.

[0170] The water tank 200 can be detachably coupled to the nozzle housing 100. Water in the water tank 200 can be supplied to each of the mops 402 and 404 in a state in which the water tank 200 is seated on the nozzle housing 100.

[0171] The water tank 200 can form the appearance of the nozzle 1 in a state of being seated on the nozzle housing 100.

[0172] The entire upper side wall of the water tank 200 substantially forms the appearance of the upper surface of the nozzle 1. Therefore, a user can easily recognize that the water tank 200 is seated or that the water tank 200 is separated from the nozzle housing 100.

[0173] The suction nozzle main body 10 can further include an operation unit 300 which is operated to separate the water tank 200 in a state in which the water tank 200 is seated on the suction nozzle housing 100.

[0174] 0For example, the operation unit 300 can be provided in the suction nozzle housing 100. The suction nozzle housing 100 can be provided with a first coupling unit 310 for coupling with the water tank 200, and the water tank 200a can be provided with a second coupling unit 254 for coupling with the first coupling unit 310.

[0175] The operation unit 300 can be arranged to be vertically movable in the suction nozzle housing 100. The first coupling unit 310 can be moved at a lower side of the operation unit 300 under the operation force of the operation unit 300.

[0176] 5For example, the first coupling unit 310 can be moved in a front-rear direction. To this end, the operation unit 300 and the first coupling unit 310 can include inclined surfaces which contact each other.

[0177] When the operation unit 300 is lowered by means of the inclined surfaces, the first coupling unit 310 can be horizontally moved (for example, in the front-rear direction).

[0178] The first coupling unit 310 includes a hook 312 for engaging with the second coupling unit 254, and the second coupling unit 254 includes a groove 256 for inserting the hook 312.

[0179] The first coupling unit 310 can be elastically supported by a second elastic member 314 to maintain a state in which the first coupling unit 310 is coupled with the second coupling unit 254.

[0180] Therefore, when the hook 312 is in a state of being inserted into the groove 256 by means of the second elastic member 314, and the operation unit 300 is pressed downward, the hook 312 is separated from the groove 256. In a state in which the hook 312 is detached from the groove 256, the water tank 200 can be separated from the suction nozzle housing 100.

[0181] The suction nozzle 1 can further include a support body 320 for lifting the second coupling unit 254 of the water tank 200 in a state in which the hook 312 is withdrawn from the groove 256. The operation of the support body 320 to lift the second coupling unit 254 will be described later with reference to the drawings.

[0182] In the present embodiment, the operation unit 300 can be positioned, for example, directly above the second flow path 114. For example, the operation unit 300 can be arranged to overlap the center line A2 of the second flow path 114 in the vertical direction.

[0183] Accordingly, since the operation unit 300 is located at the central portion of the mouthpiece 1, there is an advantage that the user can easily recognize and operate the operation unit 300.

[0184] Meanwhile, the mouthpiece body 10 can further include an adjustment unit 180 for adjusting the amount of water discharged from the water tank 200. For example, the adjustment unit 180 can be located at the rear side of the mouthpiece housing 100.

[0185] The adjustment unit 180 can be operated by the user, and the adjustment unit 180 can allow water to be discharged from the water tank 200 or prevent water from being discharged.

[0186] Alternatively, the amount of water discharged from the water tank 200 can be adjusted by the adjustment unit 180. For example, when the adjustment unit 180 is operated, a first amount of water is discharged from the water tank 200 per unit time, or a second amount of water, which is greater than the first amount, is discharged from the water tank 200 per unit time.

[0187] The adjustment unit 180 can be pivotally seated to the mouthpiece housing 100 in a lateral direction, or can be pivoted in a vertical direction.

[0188] For example, in a state in which the adjustment unit 180 is in a neutral position (as shown in FIG. 4A), the amount of water discharged is 0, and when the left side of the adjustment unit 180 is pushed to pivot the adjustment unit 180 to the left, a first amount of water can be discharged from the water tank 200 per unit time. Figure 4

[0189] When the adjustment unit 180 is pushed to the right by pushing the right side of the adjustment unit 180, a second amount of water can be discharged from the water tank 200 per unit time. A configuration regarding detecting the operation of the adjustment unit 180 will be described later with reference to the accompanying drawings.

[0190] Figure 6 and Figure 7 are exploded perspective views of a mouthpiece according to an embodiment of the present application, and Figure 8 and Figure 9 are perspective views of a water tank according to an embodiment of the present application.

[0191] Figure 3 and Figures 6 to 9 The mouthpiece body 10 can further include a plurality of driving devices 170 and 171 for separately driving the respective rotating cleaning units 40 and 41.

[0192] The plurality of driving devices 170 and 171 can include a first driving device 170 for driving the first rotating cleaning unit 40 and a second driving device 171 for driving the second rotating cleaning unit 41.

[0193] ​Since each of the driving devices 170 and 171 is separately operated, there is an advantage in that even if a part of the driving devices 170 and 171 malfunctions, the part of the rotating cleaning device can be rotated by the other driving device.

[0194] The first driving device 170 and the second driving device 171 can be spaced apart from each other in the transverse direction in the mouth body 10.

[0195] The driving devices 170 and 171 can be positioned behind the first flow path 112.

[0196] For example, at least a part of the second flow path 114 can be positioned between the first driving device 170 and the second driving device 171. At this time, the first driving device 170 and the second driving device 171 can be symmetrically disposed with respect to the center line A2 of the second flow path 114.

[0197] Accordingly, even if a plurality of driving devices 170 and 171 are provided, the second flow path 114 is not affected, and thus it is possible to minimize the length of the second flow path 114.

[0198] According to the present embodiment, since the first driving device 170 and the second driving device 171 are arranged on both sides of the second flow path 114, it is possible to evenly distribute the weight of the mouth 1 to both left and right sides, thereby being able to prevent the center of gravity of the mouth 1 from being biased to either side of the mouth 1.

[0199] A plurality of driving devices 170 and 171 can be arranged in the mouth body 10. For example, the plurality of driving devices 170 and 171 can be seated on the upper side of the mouth base 110 and covered by the mouth cover 130. In other words, the plurality of driving devices 170 and 171 can be located between the mouth base 110 and the mouth cover 130.

[0200] Each of the rotating cleaning units 40 and 41 can further include rotating plates 420 and 440 that are rotated by receiving power from each of the driving devices 170 and 171.

[0201] The rotating plates 420 and 440 can include a first rotating plate 420 connected to the first driving device 170 and attaching the first mop 402, and a second rotating plate 420 connected to the second driving device 171 and attaching the second mop 404.

[0202] The rotating plates 420 and 440 can be formed in a disc shape, and the mops 402 and 404 can be attached to the bottom surfaces of the rotating plates 420 and 440.

[0203] The rotating plates 420 and 440 can be connected to the respective driving devices 170 and 171 at the lower side of the mouthpiece base 110. In other words, the rotating plates 420 and 440 can be connected to the driving devices 170 and 171 at the outer side of the mouthpiece housing 100.

[0204] <water tank>

[0205] Figure 10 is a sectional view taken along line B-B of Figure 8 Figure 11 is a sectional view taken along line C-C of Figure 8 Figure 12 is a sectional view taken along line D-D of Figure 8 Figure 13 is a sectional view taken along line E-E of Figure 8

[0206] Referring to Figures 8 to 13 , the water tank 200 can be seated at the upper side of the mouthpiece housing 100. For example, the water tank 200 can be seated on the mouthpiece cover 130. In a state in which the water tank 200 is seated at the upper side of the mouthpiece cover 130, the upper side wall of the water tank 200 can form part of the outer appearance of the upper surface of the mouthpiece main body 10. For example, the water tank 200 can protrude upward from the mouthpiece cover 130.

[0207] The water tank 200 can include a first body 210 and a second body 250 coupled to the first body 210 and defining a chamber storing water together with the first body 210. The second body 250 can be coupled to the upper side of the first body 210.

[0208] The second body 250 can protrude substantially upward from the mouthpiece cover 130 to form the outer appearance of the upper surface of the mouthpiece 1. Although not limited thereto, the entire upper surface wall of the second body 250 can form the outer appearance of the upper surface of the mouthpiece 1.

[0209] The chamber can include a first chamber 222 located above the first driving device 170, a second chamber 224 located above the second driving device 171, and a connecting chamber 226 communicating the first chamber 222 with the second chamber 224.

[0210] The first body 210 can define a bottom wall and a side wall of the chamber, and the second body 250 can define an upper wall of the chamber. Of course, a portion of the second body 250 can also define the upper wall of the chamber.

[0211] In the present embodiment, the volume of the connecting chamber 226 can be formed to be smaller than the volumes of the first chamber 222 and the second chamber 224, so as to minimize the height of the mouthpiece 1 by the water tank 200 while increasing the water storage capacity.

[0212] ​​​​The water tank 200 can be formed to have a low height at the front portion and a high height at the rear portion. The upper surface of the water tank 200 can be inclined upward from the front side to the rear side or rounded.

[0213] For example, the connection chamber 226 can connect the first and second chambers 222 and 224 located at both sides at the front portion of the water tank 200. In other words, the connection chamber 226 can be positioned at the front portion of the water tank 200.

[0214] The water tank 200 can include a first bottom wall 213a. For example, the first body 210 can include the first bottom wall 213a.

[0215] The first bottom wall 213a is a wall located at the lowest position in the water tank 200.

[0216] The first bottom wall 213a is a horizontal wall and can be located on a bottom wall 131a of the mouthpiece cover 130, which will be described later.

[0217] The first bottom wall 213a can be a bottom wall located at the frontmost end portion of the water tank 200.

[0218] The first bottom wall 213a can include a first wall portion 214a extending in the left-right direction and a pair of second wall portions 214b extending in the front-rear direction at both ends of the wall portion 214a. The left-right length of the wall portion 214a can be substantially the same as the left-right length of the first body 210.

[0219] The width of each second wall portion 214b in the transverse direction is formed to be greater than the width of the first wall portion 214a in the front-rear direction.

[0220] At this time, the transverse width of the second wall portion 214b is greatest in a portion adjacent to the first wall portion 214a and can decrease in a portion away from the first wall portion 214a.

[0221] A discharge outlet 216 for discharging water from the water tank 200 can be formed in any one of the pair of second wall portions 214b.

[0222] Alternatively, the discharge outlet 216 can be formed at a boundary between one of the pair of second wall portions 214b and the first wall portion 214a.

[0223] The discharge outlet 216 can be opened or closed by means of a valve 230. The valve 230 can be disposed in the water tank 200. The valve 230 can be operated by means of an external force, and unless the external force is applied to the valve 230, the valve 230 keeps the discharge outlet 216 closed.

[0224] Accordingly, in a state in which the water tank 200 is separated from the mouthpiece body 10, it is possible to prevent water from being discharged from the water tank 200 via the discharge outlet 216.

[0225] In the present embodiment, the water tank 200 can include a single discharge outlet 216. The reason why the water tank 200 is provided with the single discharge outlet 216 is to reduce the number of components that can cause water leakage.

[0226] In other words, in the mouthpiece 1, there are components (control board, driving motor, etc.) that operate when receiving power, and it is necessary to completely cut off the components from contact with water. In order to block the contact between the components and water, it is essential to minimize the leakage in the portion in which the water is discharged from the water tank 200.

[0227] Because an additional structure for preventing water leakage is required, as the number of discharge outlets 216 in the water tank 200 increases, the structure becomes complicated, and even if there is a structure for preventing water leakage, there is a possibility that water leakage cannot be completely prevented.

[0228] In addition, as the number of discharge outlets 216 in the water tank 200 increases, the number of valves 230 for opening and closing the discharge outlets 216 also increases. This means that not only the number of components increases, but also the volume of the chamber for storing water in the water tank 200 decreases due to the valves 230.

[0229] Because the height of the rear side of the water tank 200 is higher than the height of the front side of the water tank 200, in order to smoothly discharge the water within the water tank 200, the discharge outlet 216 is formed on the first bottom wall 213a located at the lowest position of the first body 210.

[0230] The first body 210 can further include a second bottom wall 213b positioned at a different height from the first bottom wall 213a.

[0231] The second bottom wall 213b is a wall located behind the first bottom wall 213a and higher than the first bottom wall 213a. In other words, the height difference between the first bottom wall 213a and the second bottom wall 213b is H2.

[0232] The second bottom wall 213b can be a horizontal wall or a curved wall rounded upward.

[0233] The second bottom wall 213b can be located directly above the driving devices 170 and 171. The second bottom wall 213b is located at a higher position than the first bottom wall 213a, so that the second bottom wall 213b does not interfere with the driving devices 170 and 171.

[0234] In addition, because the second bottom wall 213b is located at a higher position than the first bottom wall 213a, and there is a water level difference between the second bottom wall 213b and the first bottom wall 213a, the water on the second bottom wall 213b side can flow smoothly to the first bottom wall 213a side.

[0235] In the present embodiment, a portion or all of the second bottom wall 213b has the highest height among the bottom walls.

[0236] The second bottom wall 213b can be formed to have a greater left-right width than a front-rear width.

[0237] The first body 210 can further include a third bottom wall 213c positioned at a different height from the first bottom wall 213a and the second bottom wall 213b.

[0238] The third bottom wall 213c is positioned higher than the first bottom wall 213a and lower than the second bottom wall 213b.

[0239] Accordingly, the third bottom wall 213c and the first bottom wall 213a differ in height by H1, which is less than H2.

[0240] The third bottom wall 213c can be positioned rearward of the second bottom wall 213a.

[0241] A portion of the third bottom wall 213c is positioned at a rear end of the first body 210.

[0242] In the present embodiment, since the third bottom wall 213c is positioned lower than the second bottom wall 213b, it is possible to increase the water storage capacity within the water tank 200 without interfering with the surrounding structure.

[0243] The first body 210 can further include a fourth bottom wall 213d extending downward from an edge of the second bottom wall 213b to be inclined. The fourth bottom wall 213d can surround the second bottom wall 213b.

[0244] The fourth bottom wall 213d can extend downward while being rounded, for example.

[0245] The first body 210 can further include a fifth bottom wall 213e extending downward from an outer periphery of the fourth bottom wall 213d to be inclined.

[0246] In other words, the height decreases from the second bottom wall 213b toward the fourth bottom wall 213d and the fifth bottom wall 213e.

[0247] The fifth bottom wall 213e can connect the fourth bottom wall 213d and the second bottom wall 213e.

[0248] In addition, the fifth bottom wall 213e can connect the fourth bottom wall 213d and the first bottom wall 213a.

[0249] A portion of the first body 210 can form receiving spaces 232 and 233 having a recessed shape by means of the second bottom wall 213b, the fourth bottom wall 213d, and the fifth bottom wall 213e. The driving devices 170 and 171 can be positioned in the receiving spaces 232 and 233.

[0250] Therefore, a portion of the bottom wall of the first body 210 can surround the outer periphery of each driving device.

[0251] The first body 210 can further include a sixth bottom wall 213f located at the rear side of each second wall portion 214b and positioned higher than each second wall portion 214b. The sixth bottom wall 213f can be positioned lower than the third bottom wall 213c.

[0252] The third bottom wall 213c can be connected to the sixth bottom wall 213f by means of a connection wall 215g.

[0253] Therefore, even though the third bottom wall 213c is located at the rear side of the second bottom wall 213c and is lower than the second bottom wall 213c, water on the second bottom wall 213c can flow to the sixth bottom wall 213f by means of the connection wall 215g. Water of the sixth bottom wall 213f can flow to the first bottom wall 213a.

[0254] The first wall portion 214a of the first bottom wall 213a and the second body 250 can define a connection flow path 226.

[0255] Because the first bottom wall 213a located at the lowest position as described above forms the connection flow path 226, water in the first chamber 222 and the second chamber 224 can flow to the discharge port 216 uniformly.

[0256] The first body 210 can further include a first side wall 215a extending upward from the first wall portion 214a of the first bottom wall 213a. The first side wall 215a can be a front wall of the first body 210.

[0257] The first side wall 215a can extend vertically upward from the front end of the first wall portion 214a.

[0258] The first body 210 can further include a second side wall 215b extending upward from the second wall portion 214b of the first bottom wall 213a.

[0259] In other words, a pair of second side walls 215b extend rearward from both sides of the first side wall 215a, and the height of the second side wall 215b increases as the distance from the first side wall 215a increases.

[0260] The pair of second side walls 215b can include a left side wall and a right side wall. At this time, the left side wall can form the first chamber 222, and the right side wall can form the second chamber 224.

[0261] An inlet for introducing water into one or more of the pair of second side walls 215b can be formed.

[0262] Figure 6It is shown that an inlet is formed in each of a pair of second side walls 215b.

[0263] For example, the left side wall can have a first inlet 211 for introducing water into the first chamber 222, and the right side wall can have a second inlet 212 for introducing water into the second chamber 224.

[0264] At this time, each of the second side walls 215b can include a recessed portion 215e recessed inward, and the recessed portion 215e can be provided with each of the inlets 211 and 212.

[0265] The first inlet 211 can be covered by a first inlet cover 240, and the second inlet 212 can be covered by a second inlet cover 242.

[0266] For example, each of the inlet covers 240 and 242 can be formed of a rubber material.

[0267] The inlet covers 240 and 242 can cover the inlets 211 and 212 in a state of being received in the recessed portion 215e. At this time, the inlet covers 240, 242 are formed in a size smaller than that of the recessed portion 215e.

[0268] Therefore, a portion of the recessed portion 215e is covered by the inlet covers 240, 242, and another portion is not covered by the inlet covers 240, 242, and thus a space 215f capable of inserting a user's finger can be formed.

[0269] Therefore, after the finger is inserted into the space 215f, the inlet covers 240, 242 can be pulled so that the inlet covers 240, 242 open the inlets 211, 212.

[0270] According to the present embodiment, the water tank 200 is provided with each of the inlets 211 and 212 located at both sides of the water tank 200, so that water can be easily introduced into the water tank 200 by opening any one of the two inlets.

[0271] The inlet covers 240, 242 can be positioned between the space 215f and the first side wall 215a, thereby securing the size of the space 215f.

[0272] The first body 210 can further include a third side wall 215c extending upward from a rear end of the third bottom wall 213c.

[0273] In addition, the first body 210 can further include a front and rear extension wall 215d extending forward from an end of the third side wall 215c and connected to the third bottom wall 213c, the fourth bottom wall 213d, and the fifth bottom wall 213e.

[0274] In the first body 210, a pair of front and rear extending walls 215d are arranged to be spaced apart from each other in the lateral direction.

[0275] The pair of front and rear extending walls 215d are arranged to face each other. When the water tank 200 is seated on the mouthpiece housing 100, the connection pipe 50 can be positioned between the pair of front and rear extending walls 215d.

[0276] The pair of front and rear extending walls 215d are located at a higher position than the first bottom wall 213a.

[0277] In the present embodiment, the chamber is formed by the first body 210 and the second body 250, and the second bottom wall 213b and the second body 250 are separated from each other to receive water, and the height difference between the second bottom wall 213b and the second body 250 is H3.

[0278] The height difference between the first bottom wall 213a and the second body 250 is H4. At this time, H4 is greater than H3. According to this structure, there is an advantage that it is possible to increase the water storage capacity while reducing the height (or total thickness) of the water tank 200.

[0279] The first body 210 can include a first slot 218 for preventing interference with the operation unit 300 and the coupling units 310 and 254. The first slot 218 can be formed such that a central rear end portion of the first body 210 is recessed forward. At this time, the pair of front and rear extending walls 215d can form a part of the first slot 218.

[0280] In addition, the second body 250 can include a second slot 252 for preventing interference with the operation unit 300. The second slot 252 can be formed such that a central rear end portion of the second body 230 is recessed forward.

[0281] The second body 250 can further include a slot cover 253 that covers a part of the first slot 218 of the first body 210 in a state of being coupled to the first body 210. In other words, the front and rear lengths of the second slot 252 are shorter than the front and rear lengths of the first slot 218.

[0282] The second coupling unit 254 can extend downward from the slot cover 253. Accordingly, the second coupling unit 254 can be located within a space formed by the first slot 218.

[0283] Accordingly, when the overall shape of the water tank 200 is observed, the length of the water tank 200 in the lateral direction is longer than the length of the water tank 200 in the front and rear direction. The front and rear length of the central portion of the water tank 200 (where the slots 218 and 252 are located) is shorter than the front and rear length of both sides.

[0284] The water tank 200 has a symmetrical shape with respect to the slots 218 and 252.

[0285] The water tank 200 can further include coupling ribs 235 and 236 for coupling with the mouthpiece cover 130 before the second coupling unit 254 of the water tank 200 is coupled with the first coupling unit 310.

[0286] The coupling ribs 235 and 236 also function to guide the coupling position of the water tank 200 in the mouthpiece cover 130 before the second coupling unit 254 of the water tank 200 is coupled with the first coupling unit 310. For example, the plurality of coupling ribs 235 and 236 protrude from the first body 110 and can be arranged to be spaced apart in the left-right horizontal direction.

[0287] Although not limited, the plurality of coupling ribs 235 and 236 can protrude forward from the first side wall 215a of the first body 210 and can be spaced apart from each other in the lateral direction.

[0288] Each of the driving devices 170 and 171 is disposed in the mouthpiece body 10 such that a portion of the mouthpiece body 10 protrudes upward on both sides of the second flow path 114 due to each of the driving devices 170 and 171.

[0289] According to the present embodiment, the portion protruding from the mouthpiece body 10 is located in a pair of receiving spaces 232 and 233 of the water tank 200. The pair of receiving spaces 232 and 233 can be divided into left and right portions by the first slot 218.

[0290] <MOU THPIECE COVER>

[0291] Figure 14 FIG. 1 is a perspective view illustrating a mouthpiece cover according to an embodiment of the present application, and Figure 15 FIG. 2 is a perspective view illustrating the mouthpiece cover according to the embodiment of the present application, as viewed from below.

[0292] Referring to Figure 6 , Figure 14 and Figure 15 , the mouthpiece cover 130 can include a bottom wall 131a and a peripheral wall 131b extending upward at an edge of the bottom wall 131a.

[0293] The mouthpiece cover 130 can include driving unit covers 132 and 134 covering upper sides of each of the driving units 170 and 171.

[0294] Each of the driving unit covers 132 and 134 is a portion protruding upward from the bottom wall 131a of the mouthpiece cover 130. The driving unit covers 132 and 134 can be separate from the peripheral wall 131b. Accordingly, a space can be formed between the driving unit covers 132 and 134 and the peripheral wall 131b, and the water tank 200 can be located in the space.

[0295] Accordingly, it is possible to prevent an increase in the height of the mouthpiece 1 caused by the water tank 200 in a state in which the water tank 200 is seated on the mouthpiece cover 130, while it is possible to increase the storage capacity of the water tank 200.

[0296] Each of the drive unit covers 132 and 134 is a portion protruding upward from the mouthpiece cover 130. Each of the drive unit covers 132 and 134 can surround the upper side of the drive devices 170 and 171 without interfering with each of the drive devices 170 and 171 installed in the mouthpiece base 110. In other words, the drive unit covers 132 and 134 are spaced apart from each other in the lateral direction in the mouthpiece cover 130.

[0297] When the water tank 200 is seated on the mouthpiece cover 130, each of the drive unit covers 132 and 134 is received in each of the receiving spaces 232 and 233 of the water tank 200, thus preventing interference between components.

[0298] In addition, in the water tank 200, the first chamber 222 and the second chamber 224 can be arranged to surround each of the respective drive unit covers 132 and 134.

[0299] Accordingly, according to the present embodiment, it is possible to increase the volume of the first chamber 222 and the second chamber 224.

[0300] The first body 210 of the water tank 200 can be seated in a lower portion of the mouthpiece cover 130 compared to the drive unit covers 132 and 134.

[0301] At least a portion of the bottom wall of the water tank 200 can be positioned lower than the axis of the drive motor (see A3 and A4 in Figure 31 , thus minimizing an increase in height due to the water tank 200.

[0302] For example, the first bottom wall 213a of the water tank 200 can be positioned lower than the axis of the drive motor (A3 and A4), which will be described later.

[0303] The mouthpiece cover 130 can further include a flow path cover 136 covering the flow path forming portion 150. The flow path cover 136 can be positioned between the drive unit covers 132 and 134 and can be arranged at a position corresponding to the first slot 218 of the water tank 200.

[0304] The mouthpiece cover 136 can also protrude upward from the bottom wall 131a of the mouthpiece cover 130.

[0305] In the present embodiment, in order to increase the water storage capacity of the water tank 200, a portion of the water tank 200 can be located on both sides of the flow path cover 136. Accordingly, it is possible to increase the water storage capacity of the water tank 200 while preventing the water tank 200 from interfering with the second flow path 114.

[0306] In addition, in order to prevent the water tank 200 from colliding with the structure around the mouthpiece 1 during movement of the mouthpiece 1, the entire water tank 200 can be arranged to overlap the mouthpiece housing 100 in the vertical direction. In other words, the water tank 200 can not protrude in the lateral direction and the front and rear direction of the mouthpiece housing 100.

[0307] The first bottom wall 213a of the water tank 200 can be seated on the bottom wall 131a of the mouthpiece cover 130. In this state, the slot cover 253 of the water tank 200 can be located directly above the flow path cover 136. The slot cover 253 can be in contact with the flow path cover 136, or can be spaced apart from the flow path cover 136.

[0308] When the water tank 200 is seated on the mouthpiece cover 130, the slot cover 253 is located in front of the operation unit 300.

[0309] When the water tank 200 is seated on the mouthpiece cover 130, the first body 210 can be surrounded by the peripheral wall 132b of the mouthpiece cover 130. Accordingly, when the water tank 200 is seated on the mouthpiece cover 130, the inlet covers on both sides of the water tank 200 are covered by the peripheral wall 132b of the mouthpiece cover 130 and are not exposed to the outside.

[0310] The mouthpiece cover 130 can further include rib insertion holes 141 and 142 into which the coupling ribs 235 and 236 provided in the water tank 200 are inserted. The rib insertion holes 141 and 142 can be spaced apart from the mouthpiece cover 130 in the lateral horizontal direction.

[0311] Accordingly, in a state in which the coupling ribs 235 and 236 are inserted into the rib insertion holes 141 and 142, the center or the rear of the water tank 200 is moved downward, and thus the second coupling unit 254 can be coupled to the first coupling unit 310.

[0312] The mouthpiece cover 130 can be provided with a valve operation unit 144 for operating the valve 230 in the water tank 200. The valve operation unit 144 can be coupled to the mouthpiece cover 130.

[0313] Water discharged from the water tank 200 can flow through the valve operation unit 144.

[0314] The valve operation unit 144 can be coupled to the lower side of the mouthpiece cover 130, and a portion of the valve operation unit 144 can protrude upward through the mouthpiece cover 130.

[0315] When the water tank 200 is seated on the nozzle cover 130, the upwardly protruding valve operation unit 144 is introduced into the water tank 200 via the discharge port 216 of the water tank 200. In other words, the valve operation unit 144 can be disposed at a position facing the discharge port 216 of the water tank 200.

[0316] The valve operation unit 144 will be described later with reference to the accompanying drawings.

[0317] The nozzle cover 130 can be provided with a seal 143 for preventing water discharged from the water tank 200 from leaking from the vicinity of the valve operation unit 144. The seal 143 can be formed of, for example, a rubber material, and can be coupled to the nozzle cover 130 from above the nozzle cover 130.

[0318] The nozzle cover 130 can be provided with a water pump 270 for controlling water discharged from the water tank 200. The water pump 270 can be connected to a pump motor 280.

[0319] A pump mounting rib 146 for mounting the water pump 270 can be provided on the lower side of the nozzle cover 130. The water pump 270 and the pump motor 280 are mounted in the nozzle cover 130, thereby preventing the pump motor 280 from contacting water even if water falls into the nozzle base 110.

[0320] The water pump 270 is a pump that is operated to communicate the inlet and the outlet by expanding or contracting a valve body therein upon operation, and can be implemented by a well-known structure, and thus a detailed description thereof will be omitted.

[0321] The valve body in the water pump 270 can be driven by the pump motor 280. Thus, according to the present embodiment, water in the water tank 200 can be continuously and stably supplied to the rotary cleaning units 40 and 41 while the pump motor 280 is operated.

[0322] The operation of the pump motor 280 can be adjusted by operating the above-described adjustment unit 180. For example, the adjustment unit 180 can select an on / off state of the pump motor 280.

[0323] Alternatively, the output (or rotational speed) of the pump motor 280 can be adjusted by the adjustment unit 180.

[0324] The nozzle cover 130 can further include at least one fastening boss 148 to be coupled with the nozzle base 110.

[0325] In addition, the nozzle cover 130 can be provided with nozzles 149 for spraying water to the rotary cleaning units 40 and 41, which will be described later. For example, a pair of nozzles 149 can be mounted on the nozzle cover 130 in a state of being spaced apart from each other in a lateral direction.

[0326] The nozzle cover 130 can be provided with a nozzle mounting boss 149c for seating the nozzle 149. For example, the nozzle 149 can be fastened to the nozzle mounting boss 149c by means of a screw.

[0327] The nozzle 149 can include a connection unit 149a for connecting a branch pipe to be described later.

[0328] <Description of structure and operation of operation unit, first coupling unit, and support>

[0329] Figure 16 is a perspective view showing a state in which the operation unit, the first coupling unit, and the support are separated from each other in the nozzle cover, and Figure 17 is a cross-sectional view taken along a line F-F of Figure 14 .

[0330] Figure 18 is a cross-sectional view taken along a line G-G of Figure 17 in a state in which the first coupling unit is coupled to the nozzle cover, and Figure 19 is a cross-sectional view showing a state in which the first coupling unit and the second coupling unit are released by pressing the operation unit.

[0331] Referring to Figures 16 to 19 , the operation unit 300 can be supported by the flow path cover 136. The flow path cover 136 can include an operation unit receiving portion 137 having a recessed shape for supporting and receiving the operation unit 300.

[0332] On both sides of the operation unit 300, a coupling hook 302 for coupling the operation unit 300 to the flow path cover 136 can be provided.

[0333] The operation unit 300 can be received in the operation unit receiving portion 137 from above the operation unit receiving portion 137.

[0334] A bottom wall of the operation unit receiving portion 137 is provided with a slot 137b penetrating in the vertical direction, and the coupling hook 302 passes through the slot 137b to be hooked on a lower surface of the bottom wall of the operation unit receiving portion 137.

[0335] When the coupling hook 302 is hooked on the bottom wall of the operation unit receiving portion 137, the operation unit 300 can be prevented from being displaced upward from the flow path cover 136.

[0336] The operation unit 300 can be elastically supported by first elastic members 306. The plurality of first elastic members 306 can support the operation unit 300 so that the operation unit 300 does not move to one side when the operation unit 300 is operated.

[0337] The plurality of first elastic members 306 can be arranged to be spaced apart from each other in the transverse direction, but are not limited thereto.

[0338] The operation unit 300 can include a first coupling protrusion portion 304 for coupling each of the first elastic members 306. The first coupling protrusion portion 304 can protrude downward from a lower surface of the operation unit 300. The protruding length of the first coupling protrusion portion 304 can be shorter than the protruding length of the coupling hook 302.

[0339] The first elastic member 306 can be, for example, a coil spring, and the upper side of the first elastic member 306 can be received in the first coupling protrusion portion 304. To this end, the first coupling protrusion portion 304 can be a cylindrical rib in which a space is formed.

[0340] The bottom wall of the operation unit receiving portion 137 can include a second coupling protrusion portion 137a to which the first elastic member 306 is coupled.

[0341] The second coupling protrusion portion 137a can protrude upward from the bottom wall of the operation unit receiving portion 137. In a state in which the first elastic member 306 is wound around the second coupling protrusion portion 137a, the first elastic member 306 can be seated on the bottom wall of the operation unit receiving portion 137. In other words, the second coupling protrusion portion 137a can be received in the space formed by the first elastic member 306.

[0342] The outer diameter of the second coupling protrusion portion 137a can be smaller than the inner diameter of the first coupling protrusion portion 304. Accordingly, it is possible to prevent the second coupling protrusion portion 137a and the first coupling protrusion portion 324 from colliding with each other during the descent of the operation unit 300.

[0343] The first coupling unit 310 is located on the slot 137b of the operation unit receiving portion 137, and both side end portions of the first coupling unit 310 can be coupled with the bottom wall of the operation unit receiving portion 137.

[0344] The first coupling unit 310 can include a hook 312, and can include a coupling rail 316 on both sides of which the bottom wall of the operation unit receiving portion 137 is coupled.

[0345] A portion of the coupling rail 316 can be seated on the upper surface of the bottom wall of the operation unit receiving portion 137, and the other portion of the coupling rail 316 can contact the lower surface of the bottom wall of the receiving portion 137.

[0346] Accordingly, the first coupling unit 310 can be stably moved in the horizontal direction in a state in which it is coupled to the bottom wall of the operation unit receiving portion 137 by means of the coupling rail 316.

[0347] As described above, the first coupling unit 310 can be elastically supported by the second elastic member 314, and the second elastic member 314 can elastically support the first coupling unit 310 on opposite sides of the hook 312.

[0348] The flow path cover 136 can further include a coupling unit receiving portion 136a that receives the second coupling unit 254 therein. The coupling unit receiving portion 136a can be located in front of the operation unit receiving portion 137.

[0349] The flow path cover 136 can further include a body receiving portion 138 that is located below the coupling unit receiving portion 136a and receives the support body 320.

[0350] Thus, in a state in which the second coupling unit 254 is received in the coupling unit receiving portion 136a, the second coupling unit 254 can be located directly above the support body 320.

[0351] The support body 320 can include a pair of coupling hooks 322 for coupling to the body receiving portion 138. The body receiving portion 138 can be provided with hook coupling grooves 138a to which the coupling hooks 322 are coupled.

[0352] In a state in which the coupling hooks 322 of the support body 320 are coupled to the hook coupling grooves 138a, the support body 320 can be vertically moved. Thus, the hook coupling grooves 138a can extend in a vertical direction.

[0353] The support body 320 can be elastically supported by a third elastic member 324.

[0354] In a state in which the coupling of the first coupling unit 310 and the second coupling unit 254 is released, the third elastic member 324 that supports the support body 320 can provide an elastic force for moving the second coupling unit 254 upward.

[0355] In a state in which the first coupling unit 310 is coupled with the second coupling unit 254, the second coupling unit 254 presses the support body 320, and the third elastic member 324 is contracted to accumulate an elastic force.

[0356] In this state, in order to separate the water tank 200, when the operation unit 300 is pressed downward, a downward moving force of the operation unit 300 is transmitted to the first coupling unit 310, so that the first coupling unit 310 is moved in a horizontal direction.

[0357] At this time, the first coupling unit 310 is moved in a direction away from the second coupling unit 254, so that the hook 312 of the first coupling unit 310 is disengaged from the groove 256 of the second coupling unit 254, thereby releasing the coupling of the first coupling unit 310 and the second coupling unit 254.

[0358] The force pressing the third elastic member 324 is removed, and the elastic restoring force of the third elastic member 324 is transmitted to the support body 320, so that the support body 320 is lifted up the second coupling unit 254 placed on the support body 320.

[0359] Then, the portion of the second coupling unit 254 in the water tank 200 is lifted up above the mouthpiece cover 130. Accordingly, there is a gap between the water tank 200 and the mouthpiece cover 130, so that the user can easily hold the water tank 200.

[0360] When the force for pressing the operation unit 300 is removed in the state in which the second coupling unit 254 is lifted up to the predetermined height, the first coupling unit 310 returns to its initial position by means of the second elastic member 314.

[0361] The hook of the first coupling unit 310 protrudes into the coupling unit receiving portion 136a and is located at the upper side of the support body 320. The lower end of the second coupling unit 254 is located on the hook 312 of the first coupling unit 310.

[0362] Figure 20 is a view showing a state in which the valve operation unit and the seal are separated from each other in the mouthpiece cover according to one embodiment of the present application.

[0363] Reference Figure 20 The mouthpiece cover 130 can include a water passage opening 145 formed at a position corresponding to the discharge port 216 of the water tank 200.

[0364] The seal 143 is connected to the bottom wall 131a at the upper side of the bottom wall 131a of the mouthpiece cover 130, and the valve operation unit 144 is connected to the bottom wall 131a at the lower side of the bottom wall 131a.

[0365] The seal 143 can include a hole 143a formed at a position corresponding to the water passage opening 145. Water can pass through the water passage opening 145 after passing through the hole 143a.

[0366] The seal 143 can further include a coupling protrusion 143b formed around the hole 143a and coupled to the bottom wall 131a of the mouthpiece cover 130. The bottom wall 131a of the mouthpiece cover 130 can have a protrusion hole 145a for coupling with the coupling protrusion 143b.

[0367] The periphery of the valve operation unit 144 can be provided with a guide protrusion 144b for guiding the coupling position of the valve operation unit 144. A pair of guide ribs 145b and 145c spaced apart from each other in the horizontal direction are provided on the bottom surface of the bottom wall 131a of the mouthpiece cover 130, so that the guide protrusion 144b can be positioned.

[0368] The absorption member 147 capable of absorbing water discharged from the water tank 200 can be coupled to the valve operation unit 144. When water is discharged from the water tank 200, the absorption member 147 initially absorbs the water, and as the amount of water discharged from the water tank 200 increases, the water absorbed by the absorption member 147 can be supplied to the mops 402 and 404 through a water supply flow path, which will be described later.

[0369] The absorption member 147 can be formed, for example, in a cylindrical shape, and can include a presser portion hole 147a through which the presser portion 144a, which will be described later, passes.

[0370] In a state in which the absorption member 147 is coupled to the valve operation unit 144, the valve operation unit 144 can be coupled to the nozzle cover 130.

[0371] The valve operation unit 144 can be coupled to the nozzle cover 130 by a fusion bonding method, or can be coupled to the nozzle cover 130 with the aid of an adhesive, but is not limited thereto.

[0372] The absorption member 147 can also function to filter foreign matter contained in water discharged from the water tank 200.

[0373] <Nozzle Base>

[0374] Figure 21 is a view showing a state in which a flow path forming portion according to an embodiment of the present application is coupled to a nozzle base, and Figure 22 is a view showing the nozzle base according to an embodiment of the present application, as viewed from below.

[0375] Referring to Figure 6 , Figure 21 and Figure 22 , the nozzle base 110 can include a pair of shaft through holes 116 and 118 through which a transmission shaft (to be described later) connected to each of the rotary plates 420 and 440 in each of the driving devices 170 and 171 passes.

[0376] The nozzle base 110 is provided with a seating groove 116a for seating a sleeve (see 174 in Figure 24 ) provided in each of the driving devices 170 and 171, and the shaft through holes 116 and 118 can be formed in the seating groove 116a.

[0377] For example, the seating groove 116a can be formed in a circular shape, and can be concave downward from the nozzle base 110. The shaft through holes 116 and 118 can be formed in the bottom of the seating groove 116a.

[0378] The sleeve (see 174 in Figure 24In a case where the 174) is seated in the seating groove 116a, horizontal movement of the driving devices 170 and 171 can be restricted in moving the suction nozzle 1 or in the operation of the driving devices 170 and 171.

[0379] The downwardly protruding protruding sleeve 111b is provided on the lower surface of the suction nozzle base 110 at a position corresponding to the seating groove 116a. The protruding sleeve 111b is a portion formed by the lower surface of the suction nozzle base 110 being generally downwardly protruding as the seating groove 116a is downwardly recessed.

[0380] Each of the shaft through-holes 116 and 118 can be disposed on both sides of the flow path forming portion 150 in a state where the flow path forming portion 150 is coupled to the suction nozzle base 110.

[0381] The suction nozzle base 110 can be provided with a mounting portion 120 for mounting a control board 115 (or a first board) for controlling each of the driving devices 170 and 171. For example, the board mounting portion 120 can be formed in a hook shape extending upward from the suction nozzle base 110.

[0382] The hook of the board mounting portion 120 hooks on the upper surface of the control board 115 to restrict upward movement of the control board 115.

[0383] The control board 115 can be mounted in a horizontal state. The control board 115 can be mounted to be spaced apart from the bottom of the suction nozzle base 110.

[0384] Accordingly, even if water falls to the bottom of the suction nozzle base 110, it is possible to prevent the water from contacting the control board 115.

[0385] The suction nozzle base 110 can be provided with a support protrusion 120a for supporting the control board 115 away from the bottom.

[0386] The board mounting portion 120 can be located on one side of the flow path forming portion 150 in the suction nozzle base 110, but is not limited thereto. For example, the control board 115 can be provided at a position adjacent to the adjustment unit 180.

[0387] Accordingly, a switch (to be described later) mounted on the control board 115 can sense the operation of the adjustment unit 180.

[0388] In the present embodiment, the control board 115 can be located on the opposite side of the valve operation unit 144 with respect to the second flow path 114. Accordingly, even if a leak occurs in the valve operation unit 144, it is possible to prevent water from flowing to the side of the control board 115.

[0389] The mouthpiece base 110 can further include a support rib 122 for supporting a lower side of each of the driving devices 170 and 171, and a fastening boss 117 and 117a for fastening each of the driving devices 170 and 171.

[0390] The support rib 122 protrudes from the mouthpiece base 110 and is bent at least once to separate each of the driving devices 170 and 171 from a bottom of the mouthpiece base 110. Alternatively, a plurality of spaced apart support ribs 122 can protrude from the mouthpiece base 110 to separate each of the driving devices 170 and 171 from the bottom of the mouthpiece base 110.

[0391] Even if water falls to the bottom of the mouthpiece base 110, the driving devices 170 and 171 are spaced apart from the bottom of the mouthpiece base 110 by the support rib 122, and thus water flow to the driving devices 170 and 171 can be minimized.

[0392] In addition, because the sleeve (see 174 in FIG. 17) of each of the driving devices 170 and 171 is seated in the seating groove 116a, even if water falls to the bottom of the mouthpiece base 110, water can be prevented from being drawn into the driving devices 170 and 171 by the sleeve (see 174 in FIG. 17). Figure 24 Figure 24 In addition, because the sleeve (see 174 in FIG. 17) of each of the driving devices 170 and 171 is seated in the seating groove 116a, even if water falls to the bottom of the mouthpiece base 110, water can be prevented from being drawn into the driving devices 170 and 171 by the sleeve (see 174 in FIG. 17).

[0393] In addition, the mouthpiece base 110 can further include a nozzle hole 119 through which each of the nozzles 149 passes.

[0394] When the mouthpiece cover 130 is coupled to the mouthpiece base 110, a portion of the nozzles 149 coupled to the mouthpiece cover 130 can pass through the nozzle hole 119.

[0395] In addition, the mouthpiece base 110 can further include an escape hole 121a for preventing interference with a structure of each of the driving devices 170 and 171, and a fastening boss 121 for fastening the flow path forming portion 150.

[0396] At this time, a fastening member passing through the flow path forming portion 150 can be fastened to the fastening boss 121 after passing through a portion of the driving devices 170 and 171.

[0397] A portion of each of the driving devices 170 and 171 can be positioned in the escape hole 121a such that the support rib 122 can be positioned at an outer periphery of the escape hole 121a to minimize water flow to the escape hole 121a.

[0398] For example, the support rib 122 can be positioned in the escape hole 121a in a formed area.

[0399] ​The lower surface of the nozzle base 110 can be provided with a plate receiving portion 111 recessed upward, such that the first flow path 112 is as close as possible to the floor on which the nozzle 1 is placed in a state in which the rotary cleaning units 40 and 41 are coupled to the lower side of the nozzle base 110.

[0400] In a state in which the rotary cleaning units 40 and 41 are coupled by means of the plate receiving portion 111, an increase in the height of the nozzle 1 can be minimized.

[0401] In a state in which the rotary cleaning units 40 and 41 are located in the plate receiving portion 111, the rotary cleaning units 40 and 41 can be coupled with the driving devices 170 and 171.

[0402] The nozzle base 110 can be provided with a bottom rib 111a arranged to surround the shaft through holes 116 and 118. For example, the bottom rib 111a can protrude downward from the lower surface of the plate receiving portion 111, and can be formed in a ring shape.

[0403] The shaft through holes 116 and 118, the nozzle hole 119, and the escape hole 121a can be located in an area formed by the bottom rib 111a.

[0404] <Installation positions of a plurality of switches>

[0405] Figure 23 FIG. 1 is a view showing a plurality of switches provided on a control panel according to one embodiment of the present application.

[0406] Reference Figure 4 and Figure 23 As described above, the nozzle base 110 is provided with the control panel 115 as described above. The upper surface of the control panel 115 can be provided with a plurality of switches 128a and 128b to sense the operation of the adjustment unit 180.

[0407] The plurality of switches 128a and 128b can be installed in a state of being spaced apart in a lateral direction.

[0408] The plurality of switches 128a and 128b can include a first switch 128a to sense a first position of the adjustment unit 180 and a second switch 128b to sense a second position of the adjustment unit 180.

[0409] For example, when the adjustment unit 180 is pivoted to the left and moved to the first position, the adjustment unit 180 presses a contact of the first switch 128a to turn on the first switch 128a. In this case, the pump motor 280 is operated as a first output, and water in the water tank 200 can be discharged in a first amount per unit time.

[0410] When the adjustment unit 180 is pivoted to the right and moved to the second position, the adjustment unit 180 presses the contact of the second switch 128b, so that the second switch 128b is turned on.

[0411] In this case, the pump motor 280 operates as a second output, which is greater than the first output, so that the water in the water tank 200 can be discharged in a second amount per unit time.

[0412] The pump motor 280 can be controlled by a controller mounted on the control panel 115. The controller can control the duty cycle of the pump motor 280.

[0413] For example, the controller can control the pump motor 280 to be turned on for N seconds and turned off for M seconds. The pump motor 280 can be repeatedly turned on and turned off to discharge water from the water tank 200.

[0414] At this time, the turn-off time can be changed while maintaining the turn-on time of the pump motor 280 by the operation of the controller 180, so that the amount of water discharged from the water tank 200 can be changed.

[0415] For example, to increase the amount of water discharged in the water tank 200, the controller can control to turn on the pump motor 280 for N seconds and then turn off the pump motor 280 for P seconds, P being less than M. In any case, the turn-off time of the pump motor 280 can be controlled to be longer than the turn-on time thereof.

[0416] When the adjustment unit 180 is located at a neutral position between the first position and the second position, the adjustment unit 180 does not press the contacts of the first switch 128a and the second switch 128b, and the pump motor 280 is stopped.

[0417] <Drive device>

[0418] Figure 24 is a view showing the first drive device and the second drive device according to one embodiment of the present application as viewed from below, Figure 25 is a view showing the first drive device and the second drive device according to an embodiment of the present application as viewed from above, Figure 26 is a view showing a structure for preventing the rotation of the motor housing and the drive motor, and Figure 27 is a view showing a state in which a transmission unit according to one embodiment of the present application is coupled with the drive motor.

[0419] Reference Figures 23 to 27 The first drive device 170 and the second drive device 171 can be formed and arranged symmetrically in a lateral direction.

[0420] The first drive device 170 can include a first drive motor 182, and the second drive device 171 can include a second drive motor 184.

[0421] A motor PCB 350 (or a second board) for driving each driving motor can be connected to the driving motors 182 and 184. The motor PCB 350 can be connected to the control board 115 to receive a control signal. The motor PCB 350 can be connected to the driving motors 182 and 184 in a standing state, and can be spaced apart from the suction nozzle base 110.

[0422] The controller can sense a current of each driving motor 182 and 184. Because a frictional force between the mop 402 and the floor acts as a load on the driving motors 182 and 184 in a state in which the suction nozzle 1 is placed on the floor, the current of the driving motors 182 and 184 can be equal to or greater than a first reference value.

[0423] Meanwhile, because there is no frictional force between the mop 402 and the floor when the suction nozzle 1 is lifted from the floor, the current of each driving motor 182 and 184 can be less than the first reference value.

[0424] Therefore, when the sensed current of each driving motor 182 and 184 is less than the first reference value and a time during which the sensed current is less than the first reference value is equal to or greater than a reference time, the controller can stop the operation of the pump motor 280. Alternatively, when the sensed current of each driving motor 182 and 184 is less than the first reference value, the controller can stop the operation of the pump motor 280.

[0425] In addition, when the sensed current of each driving motor 182 and 184 is less than the first reference value and a time during which the sensed current is less than the first reference value is equal to or greater than a reference time, the controller can stop the operation of each driving motor 182 and 184. Alternatively, if the sensed current of each driving motor 182 and 184 is less than the first reference value, the controller can stop the operation of each driving motor 182 and 184.

[0426] When the sensed current of the driving motors 184 and 184 is equal to or greater than the first reference value, the controller can simultaneously or sequentially operate the pump motor 280 and each driving motor 182 and 184.

[0427] The terminal for supplying power to the suction nozzle 1 in the suction nozzle 1 of the present embodiment can be located in the connection pipe 50.

[0428] As described above, the suction nozzle 1 can include the rotating cleaning units 40 and 41 and the driving devices 170 and 171 for driving the rotating cleaning units 40 and 41 and the pump motor 280. Thus, only when power is supplied to the connection pipe 50, the driving devices 170 and 171 and the pump motor 280 operate to rotate the rotating cleaning units 40 and 41 to clean the floor, and water can be supplied from the water tank 200 to the rotating cleaning units 40 and 41.

[0429] Thus, when the suction nozzle 1 of the present embodiment is connected to a cleaner used by an existing user, the floor can be cleaned using the suction nozzle 1, so that the present suction nozzle 1 can be used with an additional accessory of the existing cleaner.

[0430] The motor PCB 350 can include a plurality of resistors 352 and 354 for improving electromagnetic interference (EMI) performance of driving the motor.

[0431] For example, a pair of resistors 352 and 354 can be provided in the motor PCB 350.

[0432] One resistor of the pair of resistors 352 and 354 can be connected to a (+) terminal of driving the motor, and the other resistor can be connected to a (-) terminal of driving the motor. Such a pair of resistors 352 and 354 can reduce fluctuations in output of driving the motor.

[0433] The pair of resistors 352 and 354 can be spaced apart from the motor PCB 350, for example, laterally.

[0434] Each of the driving devices 170 and 171 can further include a motor housing. The driving motors 182 and 184 and a transmission unit for transmitting power can be received in the motor housing.

[0435] The motor housing can include, for example, a first housing 172 and a second housing 173 coupled to an upper side of the first housing 172.

[0436] In a state in which each of the driving motors 182 and 184 is mounted in the motor housing, an axis of each of the driving motors 182 and 184 can extend in a substantially horizontal direction.

[0437] If the driving devices are mounted in the motor housing such that the axes of each of the driving motors 182 and 184 extend in the horizontal direction, the driving devices 170 and 171 can be compact. In other words, a height of the driving devices 170 and 171 can be reduced.

[0438] The first housing 172 can have a shaft hole 175 through which a transmission shaft 190 coupled with the rotating plates 420 and 440 of the transmission unit protrudes downwardly through a lower side of the motor housing.

[0439] A horizontal cross section of the transmission shaft 190 can be formed in a non-circular shape to prevent relative rotation of the transmission shaft 190 in a state in which the transmission shaft 190 is coupled to the rotation plates 420 and 440.

[0440] A sleeve 174 can be provided around the shaft hole 175 in the first housing 172. The sleeve 174 can protrude from a lower surface of the first housing 172.

[0441] The sleeve 174 can be formed, for example, in a ring shape. Accordingly, the sleeve 174 can be seated in the seating groove 116a, which is in a circular shape.

[0442] In this state, the drive motors 182 and 184 can be seated on the first housing 172 and fixed to the first housing 172 by means of the motor fixing unit 183.

[0443] The drive motors 182 and 184 can be formed in an approximate cylindrical shape, and in a state in which axes of the drive motors 182 and 184 are substantially horizontal (in a state in which the drive motors 182 and 184 are laid flat), the drive motors 182 and 184 can be seated in the first housing 172.

[0444] A cross section of the motor fixing unit 183 can be formed in a substantially semicircular shape, and can cover upper portions of the drive motors 182 and 184 seated on the first housing 172. The motor fixing unit 183 can be fixed to the first housing 172 by means of fastening members such as screws.

[0445] The second housing 173 can include a motor cover 173a covering a portion of the drive motors 182 and 184.

[0446] For example, the motor cover 173a can be rounded to surround the motor fixing unit 183 from the outside of the motor fixing unit 183.

[0447] For example, the motor cover 173a can be formed in a rounded shape such that a portion of the second housing 173 protrudes upward.

[0448] Anti-rotation ribs 173c and 173d are formed on a surface of the motor cover 173a facing the motor fixing unit 183 to prevent relative rotation between the motor cover 173a and the motor fixing unit 183 during operation of the drive motors 182 and 184.

[0449] The motor fixing unit 183 has rib-receiving grooves 5183a for receiving the anti-rotation ribs 173c and 173d formed therein.

[0450] Although not limited, the width of the anti-rotation ribs 173c and 173d can be the same as the width of the rib-receiving slot 183a.

[0451] Alternatively, the plurality of anti-rotation ribs 173c and 173d can be spaced apart from the motor cover 173a in the circumferential direction of the driving motors 182 and 184, and the plurality of anti-rotation ribs 173c and 173d can be received in the rib-receiving slot 183a0.

[0452] At this time, the maximum width of the plurality of anti-rotation ribs 173c and 173d in the circumferential direction of the driving motors 182 and 184 can be equal to or slightly smaller than the width of the rib-receiving slot 183a.

[0453] The transmission unit can include a driving gear 185 connected to the shaft of each of the driving motors 182 and 184, and a plurality of transmission gears 186, 187, 188, and 189 for transmitting the rotational force of the driving gear 185.

[0454] 5The axes of the driving motors 182 and 184 (see Figure 30 A3 and A4 in FIG. 1A) extend in a horizontal direction,

[0455] While the center lines of the rotating plates 420 and 440 extend in a vertical direction. Accordingly, the driving gear 185 can be, for example, a spiral bevel gear.

[0456] The plurality of transmission gears 186, 187, 188, and 189 can include a first transmission gear 186 engaged with the driving gear 185. The first transmission gear 186 can have a rotation center extending in a vertical direction.

[0457] The first transmission gear 186 can include a spiral bevel gear so that the first transmission gear 186 can be engaged with the driving gear 185.

[0458] The first transmission gear 186 can further include a helical gear arranged at the lower side of the spiral bevel gear as a second gear.

[0459] The plurality of transmission gears 186, 187, 188, and 189 can further include a second transmission gear 187 engaged with the first transmission gear 186.

[0460] The second transmission gear 187 can be a two-stage helical gear. In other words, the second transmission gear 187 includes two helical gears arranged vertically, and the upper helical gear can be connected to the helical gear of the first transmission gear 186.

[0461] The plurality of transmission gears 186, 187, 188, and 189 can further include a third transmission gear 188 engaged with the second transmission gear 187.

[0462] The third transmission gear 188 can also be a two-stage bevel gear. In other words, the third transmission gear 188 includes two bevel gears arranged vertically, and the upper bevel gear can be connected to the lower bevel gear of the second transmission gear 187.

[0463] The plurality of transmission gears 186, 187, 188, and 189 can further include a fourth transmission gear 189 engaged with the lower bevel gear of the third transmission gear 188. The fourth transmission gear 189 can be a bevel gear.

[0464] A transmission shaft 190 can be coupled to the fourth transmission gear 189. In other words, the fourth transmission gear 189 is an output end of the transmission part. The transmission shaft 190 can be coupled to pass through the fourth transmission gear 189. The transmission shaft 190 can rotate together with the fourth transmission gear 189.

[0465] Accordingly, the upper bearing 191 is coupled to the upper end of the transmission shaft 190 passing through the fourth transmission gear 189, and the lower bearing 191a is coupled to the transmission shaft 190 on the lower side of the fourth transmission gear 189.

[0466] Figure 28 FIG. 10 is a view showing a state in which a transmission unit according to another embodiment of the present application is coupled to driving motors.

[0467] The other parts of the present embodiment are the same as those of the previous embodiment, but the configuration of the transmission part is different. Accordingly, only the characteristic part of the present embodiment will be described below.

[0468] Referring to Figure 28 , the transmission unit of the present embodiment can include a driving gear 610 connected to the shafts of the driving motors 182 and 184.

[0469] The driving gear 610 can be a worm gear. The rotation axis of the driving gear 610 can extend in the horizontal direction. Since the driving gear 610 rotates together with the rotation axis of the driving gear 610, a bearing 640 can be connected to the driving gear 610 to rotate smoothly.

[0470] The first housing 600 can include a motor support part 602 for supporting the driving motors 182 and 184, and a bearing support part 604 for supporting the bearing 640.

[0471] The transmission unit can further include a plurality of transmission gears 620, 624, and 628 for transmitting the rotational force of the driving gear 610 to the rotating plates 420 and 440.

[0472] The plurality of transmission gears 620, 624, and 628 can include a first transmission gear 620 engaged with the driving gear 610. The first transmission gear 620 can include an upper worm gear engaged with the driving gear 610.

[0473] Because the drive gear 610 and the first transmission gear 620 are engaged with each other in the form of a worm gear, there is an advantage of reducing noise through friction in the process of transmitting the rotational force of the drive gear 610 to the first transmission gear 620.

[0474] The first transmission gear 620 can include a helical gear arranged at the lower side of the upper worm gear as a second gear.

[0475] The first transmission gear 620 can be rotatably connected to a first shaft 622 extending in a vertical direction. The first shaft 622 can be fixed to the first housing 600.

[0476] Accordingly, the first transmission gear 620 can rotate with respect to the fixed first shaft 622. According to the present embodiment, because the first transmission gear 620 is configured to rotate with respect to the first shaft 622, there is an advantage of not requiring a bearing.

[0477] The plurality of transmission gears 620, 624, and 628 can further include a second transmission gear 624 engaged with the first transmission gear 620. The second transmission gear 624 is, for example, a helical gear.

[0478] The second transmission gear 624 can be rotatably connected to a second shaft 626 extending in a vertical direction. The second shaft 626 can be fixed to the first housing 600.

[0479] Accordingly, the second transmission gear 624 can rotate with respect to the fixed second shaft 626. According to the present embodiment, because the second transmission gear 624 is configured to rotate with respect to the second shaft 626, there is an advantage of not requiring a bearing.

[0480] The plurality of transmission gears 620, 624, and 628 can further include a third transmission gear 628 engaged with the second transmission gear 624. The third transmission gear 628 is, for example, a helical gear.

[0481] The third transmission gear 628 can be connected to a transmission shaft 630 connected to the rotation plates 420 and 440. The transmission shaft 630 can be connected to the third transmission gear 628 and rotate together with the third transmission gear 628.

[0482] A bearing 632 can be coupled to the transmission shaft 630 to smoothly rotate the transmission shaft 630.

[0483] <Arrangement of driving device in mouthpiece base>

[0484] Figure 29 is a diagram showing a relationship between a rotation direction of a rotation plate and an extension direction of an axis of a driving motor according to an embodiment of the present application, Figure 30is a plan view showing a state in which the driving device according to one embodiment of the present application is mounted on the nozzle base, and Figure 31 is a front view showing a state in which the driving device according to one embodiment of the present application is mounted on the nozzle base.

[0485] In particular, Figure 30 a state in which the second housing of the motor housing is removed is shown.

[0486] Referring to Figures 29 to 31 , the first and second rotating plates 420 and 440 arranged in the lateral direction in the nozzle 1 can rotate in opposite directions to each other.

[0487] For example, a portion of each rotating plate 420 and 440 closest to the center line A2 of the second flow path 114 can rotate away from the first flow path 112 toward one side of the first flow path 112.

[0488] The axes A3 and A4 of the driving motors 182 and 184 can be arranged substantially parallel to tangents of the rotating plates 420 and 440.

[0489] In the present embodiment, the term "substantially parallel" means that the angle between two lines is within 5 degrees even if not parallel.

[0490] When considering vibrations due to driving forces generated in each driving motor 182 and 184 and vibrations due to friction with the floor generated by rotation of the rotating cleaning units 40 and 41, the driving motors 182 and 184 can be arranged symmetrically with respect to the center line A2 of the second flow path 114.

[0491] Each of the driving motors 182 and 184 is arranged to vertically overlap the rotating plates 420 and 440.

[0492] At least a portion of each of the driving motors 182 and 184 can be located in a region between the rotation centers C1 and C2 of the rotating plates 420 and 440 and the outer peripheral surfaces of the rotating plates 420 and 440. For example, all of the driving motors 184 and 184 can be arranged to overlap the rotating plates 420 and 440 in the vertical direction.

[0493] Preferably, each driving motor 182 and 184 can be positioned as close as possible to the center line A2 of the second flow path 114 from the nozzle 1, thereby maximizing vibration balance in the entire nozzle 1.

[0494] For example, as shown in Figure 30 , the axes A3 and A4 of the driving motors 182 and 184 can be arranged to extend in the front-rear direction. At this time, the axes A3 and A4 of the driving motors 182 and 184 can be substantially parallel to the center line A2 of the second flow path 114.

[0495] The drive motors 182 and 184 can include front end portions 182a and rear end portions 182b spaced apart from each other in the extension direction of the axes A3 and A4.

[0496] The front end portions 182a can be positioned closer to the first flow path 112 than the rear end portions 182b.

[0497] The center of rotation of the fourth transmission gear 189, which is substantially the center of rotation of the cleaning unit, can be located in a region corresponding to the region between the front end portions 182a and the rear end portions 182b.

[0498] At least a portion of the fourth transmission gear 189 can be arranged to overlap the drive motors 182 and 184 in the vertical direction.

[0499] The drive motors 182 and 184 include connection surfaces for connection between the front end portions 182a and the rear end portions 182b, and the outermost lines 182c of the connection surfaces can overlap the fourth transmission gear 189 in the vertical direction.

[0500] The axes A3 and A4 of each of the drive motors 182 and 184 can be positioned higher than the rotational locus of the transmission gears.

[0501] With this arrangement of the drive devices 170 and 171, the weight of each of the drive devices 170 and 171 can be evenly distributed to the left and right sides of the nozzle 1.

[0502] In addition, because the axis A3 of the first drive motor 182 and the axis A4 of the second drive motor 184 extend in the front-rear direction, it is possible to prevent the height of the nozzle 1 from increasing due to the respective drive motors 182 and 184.

[0503] An imaginary line A5 connecting the axis A3 of the first drive motor 182 and the axis A4 of the second drive motor 184 passes through the second flow path 114. This is because each of the drive motors 182 and 184 is positioned close to the rear side of the nozzle 1, thereby making it possible to prevent the drive motors 182 and 184 from increasing the height of the nozzle 1.

[0504] In addition, in a state in which the drive gears 185 and 185 are connected to the shafts of each of the drive motors 182 and 184 such that the increase in the height of the nozzle 1 by each of the drive devices 170 and 171 is minimized, the drive gears 185 and 185 can be located between the drive motors 182 and 184 and the first flow path 112.

[0505] In this case, because the drive motors 182 and 184 having the longest vertical length of the drive devices 170 and 171 are positioned as close to the rear side in the mouthpiece main body 10 as possible, the increase in the height of the front end portion side of the mouthpiece 1 can be minimized.

[0506] Because the drive devices 170 and 171 are positioned close to the rear side of the mouthpiece 1, and the water tank 200 is positioned above the drive devices 170 and 171, the center of gravity of the mouthpiece 1 can be pulled toward the rear side of the mouthpiece 1 due to the water in the water tank 200 and the weight of the drive devices 170 and 171.

[0507] Therefore, in the present embodiment, the connecting chamber (see Figure 6 226) of the water tank 200 is positioned between the first flow path 112 and the drive devices 170 and 171 with respect to the front-rear direction of the mouthpiece 1.

[0508] In the present embodiment, the rotation centers C1 and C2 of the rotation plates 420 and 440 coincide with the rotation center of the transmission shaft 190.

[0509] The axes A3 and A4 of the drive motors 182 and 184 can be positioned in the region between the rotation centers C1 and C2 of the rotation plates 420 and 440.

[0510] In addition, the drive motors 182 and 184 can be positioned in the region between the rotation centers C1 and C2 of the rotation plates 420 and 440.

[0511] In addition, each of the drive motors 182 and 184 can be arranged to overlap an imaginary line connecting the first rotation center C1 and the second rotation center C2 in the vertical direction.

[0512] <Arrangement relationship between drive unit cover of mouthpiece cover and rotation center of rotation plate and motor>

[0513] Figure 32 is a view showing the structure of the drive unit cover of the mouthpiece cover and the arrangement relationship between the rotation center of the rotation plate and the drive motor according to one embodiment of the present application.

[0514] Referring to Figure 14 and Figure 32 , the pair of drive unit covers 132 and 134 of the mouthpiece cover 130 are arranged in a shape that is symmetrical in the lateral direction and convex upward.

[0515] Each of the drive unit covers 132 and 134 can include a first protruding surface 135a extending upward from the bottom wall 130a of the mouthpiece cover 130, and a second protruding surface 135b positioned higher than the first protruding surface 135a and having a different curvature from the first protruding surface 135a.

[0516] The first protruding surface 135a and the second protruding surface 135b can be directly connected, or can be connected with the aid of a third protruding surface 135c.

[0517] At this time, the third protruding surface 135c is formed to have a different curvature from each of the first protruding surface 135a and the second protruding surface 135b. The third protruding surface 135c is located higher than the first protruding surface 135a and lower than the second protruding surface 135b.

[0518] In the present embodiment, the second protruding surface 135b can overlap the second bottom wall 213b of the water tank 200 in the vertical direction. Also, the second protruding surface 135b can be formed in a shape corresponding to the second bottom wall 213b of the water tank 200.

[0519] The second protruding surface 135b can be a surface located at the highest position among the drive unit covers 132 and 134.

[0520] For example, the second protruding surface 135b can be formed to have a left-right length (width) longer than a front-rear length (width). In the present embodiment, the length direction of the second protruding surface 135b is long in the lateral direction.

[0521] The length direction of the second protruding surface 135b intersects the extension directions of the axes A3 and A4 of the drive motors 182 and 184.

[0522] The center C3 (e.g., the center of curvature) of the drive unit covers 132 and 134 can be located on the second protruding surface 135b.

[0523] The center C4 of the second protruding surface 135b is eccentric with respect to the center C3 of the drive unit cover 132.

[0524] For example, the center C4 of the second protruding surface 135b is eccentric in a direction away from the center line A2 of the second flow path 114 at the center C3 of the drive unit cover 132.

[0525] Therefore, the center C3 of the drive unit covers 132 and 134 is located between the center C4 of the second protruding surface 135b and the center line A2 of the second flow path 114.

[0526] Also, the rotation centers C1 and C2 of the rotation plates 420 and 440 can be positioned to overlap the second protruding surface 135b in the vertical direction.

[0527] The rotation centers C1 and C2 of the rotation plates 420 and 440 are eccentric with respect to the centers C3 of the drive unit covers 132 and 134.

[0528] For example, the rotation centers C1 and C2 of the rotating plates 420 and 440 may be eccentric at the center C3 of the drive unit covers 132 and 134 in a direction away from the center line A2 of the second flow path 114.

[0529] Therefore, the center C3 of the drive unit covers 132 and 134 is located between the rotation centers C1 and C2 of the rotating plates 420 and 440 and the center line A2 of the second flow path 114.

[0530] At this time, the rotation centers C1 and C2 of the rotating plates 420 and 440 are aligned with the center C4 of the second protruding surface 135b, or spaced apart from the center C4 of the second protruding surface 135b in the front-back direction.

[0531] The center C3 of the drive unit covers 132 and 134 can be located between the axes A3 and A4 of the drive motors 182 and 184 and the center C4 of the second protruding surface 135b.

[0532] The center C3 of the drive unit covers 132 and 134 can be located between the axes A3 and A4 of the drive motors 182 and 184 and the rotation centers C1 and C2 of the rotating plates 420 and 440.

[0533] The central axis Y, which bisects the length of the nozzle cover 130 (or the nozzle body or the nozzle shell) in the front-back direction, can be arranged to overlap with the second protruding surface 135b in the vertical direction.

[0534] The central axis Y, which bisects the length of the nozzle cap 130 in the front-back direction, can be positioned closer to the front end of the nozzle cap 130 than the center C4 of the second protruding surface 135b.

[0535] <Rotating Plate>

[0536] Figure 33 This is a diagram of a rotating plate according to an embodiment of the present invention, viewed from above. Figure 34 This is a diagram of a rotating plate according to an embodiment of the present invention, viewed from below.

[0537] refer to Figure 34 and Figure 34 Each of the rotating plates 420 and 440 can be formed into a disc shape to prevent interference between them during rotation.

[0538] Each of the rotating plate 420 and the rotating plate 440 includes: an outer body 420a in the form of an annulus; an inner body 420b located in the central region of the outer body 420a and spaced apart from the inner peripheral surface of the outer body 420a; and a plurality of connecting ribs 425 connecting the outer peripheral surface of the inner body 420b and the inner peripheral surface of the outer body 420a.

[0539] The height of the inner body 420b can be lower than the height of the outer body 420a. The upper surface of the inner body 420b can be positioned lower than the upper surface 420c of the outer body 420a.

[0540] The central portion of each of the rotating plates 420 and 440 can be provided with a shaft coupling unit 421 for coupling the transmission shaft 190.

[0541] For example, the shaft coupling unit 421 can be provided at the central portion of the inner body 420b. The shaft coupling unit 421 can protrude upward from the upper surface of the inner body 420b, and the upper surface of the shaft coupling unit 421 can be positioned higher than the upper surface 420c of the outer body 420a.

[0542] For example, the transmission shaft 190 can be inserted into the shaft coupling unit 421. To this end, the shaft receiving groove 422 for inserting the transmission shaft 190 can be formed in the shaft coupling unit 421.

[0543] The fastening member can be pulled into the shaft coupling unit 421 from below the rotating plates 420 and 440, and fastened to the transmission shaft 190 in a state in which the transmission shaft 190 is coupled to the shaft coupling unit 421.

[0544] The rotating plates 420 and 440 can include a plurality of water passing holes 424 arranged outside the shaft coupling unit 421 in the radial direction.

[0545] In the present embodiment, because the rotating plates 420 and 440 rotate in a state in which the mops 402 and 404 are attached to the lower sides of the rotating plates 420 and 440, water is smoothly supplied to the mops 402 and 404 via the rotating plates 420 and 440, and thus the plurality of water passing holes 424 can be spaced apart circumferentially about the shaft coupling unit 421.

[0546] The plurality of water passing holes 424 can be defined by a plurality of connecting ribs 425. At this time, each of the connecting ribs 425 can be positioned lower than the upper surface 420c of the rotating plates 420 and 440. In other words, each of the connecting ribs 425 can be positioned lower than the upper surface 420c of the outer body 420a.

[0547] Both sides of the connecting rib 425 can include an inclined surface inclined downward, so that in the case in which water falls into the connecting rib 425, the water can flow smoothly into the adjacent water passing hole 424. The inclined surface can be flat or rounded.

[0548] Accordingly, the width of the connecting rib 425 increases from the upper side to the lower side with respect to the vertical cross section of the connecting rib 425.

[0549] The portion of the connection rib 425 connected to the inner circumferential surface of the outer body 420a and the portion of the connection rib 425 connected to the outer circumferential surface of the inner body 420b are rounded in the horizontal direction and have the maximum width of the full length (the length of the rotating plate in the radial direction).

[0550] The inner body 420b is provided with a groove portion 421a that provides a space for positioning the protruding sleeve 111b of the mouthpiece base 110. The protruding sleeve 111b can be seated in the groove portion 421a. Alternatively, the lower surface of the protruding sleeve 111b is spaced apart from the bottom of the groove portion 421a, but is lower than the upper surface of the inner body 420b.

[0551] The protruding sleeve 111b surrounds the shaft coupling unit 421. Therefore, by means of the protruding sleeve 111b, it is possible to prevent water dripped onto the rotating plates 420 and 440 from flowing to the shaft coupling unit 421 side.

[0552] Because the rotating plates 420 and 440 rotate, a centrifugal force acts on the rotating plates 420 and 440. It is necessary to prevent water sprayed to the rotating plates 420 and 440 from flowing radially outward in a state in which the water cannot pass through the water passage holes 424 in the rotating plates 420 and 440 due to the centrifugal force.

[0553] Therefore, a water-blocking rib 426 can be formed on the upper surface of the rotating plates 420 and 440 radially outward of the water passage holes 424.

[0554] For example, the water-blocking rib 426 can protrude upward from the upper surface 420c of the outer body 420a. The water-blocking rib 426 can be formed continuously in the circumferential direction.

[0555] A plurality of water passage holes 424 can be located in the inner region of the water-blocking rib 426. For example, the water-blocking rib 426 can be formed in the form of a circular ring.

[0556] The center of the water-blocking rib 426 can coincide with the center of the bottom rib 111a formed in the mouthpiece base 110.

[0557] The diameter of the bottom rib 111a of the mouthpiece base 110 can be greater than the diameter of the water-blocking rib 426 (see Figure 39 ). Therefore, because the two ribs are arranged outward in the radial direction in sequence, it is possible to improve the water-blocking effect.

[0558] A mounting groove 428 can be formed on the lower surface 420d of the rotating plates 420 and 440 to provide an attachment device (see Figure 38 428a) for attaching the mops 402 and 404. For example, the mounting groove 428 can be formed on the lower surface of the outer body 420a.

[0559] The attachment device (seeFigure 38 Velcro® of 428a) can be, for example, Velcro®.

[0560] The plurality of mounting grooves 428 can be spaced apart in a circumferential direction with respect to the rotation centers C1 and C2 of the rotating plates 420 and 440. Accordingly, a plurality of attachment means (see Figure 38 Velcro® of 428a).

[0561] In the present embodiment, the mounting grooves 428 can be arranged radially outward of the water passage holes 424 with respect to the rotation centers C1 and C2 of the rotating plates 420 and 440.

[0562] For example, the water passage holes 424 and the mounting grooves 428 can be sequentially arranged radially outward of the rotation centers C1 and C2 of the rotating plates 420 and 440.

[0563] The plurality of mounting grooves 428 can be formed, for example, in an arc shape, and the length of the arc of the plurality of mounting grooves 428 can be formed to be greater than the distance between two adjacent mounting grooves.

[0564] The through hole of the plurality of water passage holes can be located in a region between two adjacent mounting grooves.

[0565] The lower surface 420d of the rotating plates 420 and 440 can be provided with a contact rib 430 that contacts the mop 402 or 404 in a state in which the mop 402 or 404 is attached to the attachment means.

[0566] The contact rib 430 can protrude downward from the lower surface 420d of the rotating plates 420 and 440. For example, the contact rib 430 can protrude downward from the lower surface of the outer body 420a.

[0567] The contact rib 430 is arranged radially outward of the water passage hole 424 and can be continuously formed in a circumferential direction. For example, the contact rib 430 can be formed in a circular ring shape.

[0568] Since the mops 402 and 404 themselves (for example, as a fibrous material) can be deformed, there can be a gap between the mops 402 and 404 and the lower surface 420d of the rotating plates 420 and 440 in a state in which the mops 402 and 404 are attached to the rotating plates 420 and 440 by means of the attachment means.

[0569] When the gap between the mops 402 and 404 and the lower surface 420d of the rotating plates 420 and 440 is large, there is a concern that water, in a state of passing through the water passage hole 424, will not be absorbed onto the mops 402 and 404, but will flow to the outside through the gap between the lower surface 420d of the rotating plates 420 and 440 and the upper surface of the mops 402 and 404.

[0570] However, according to the present embodiment, when the mops 402 and 404 are coupled to the rotating plates 420 and 440, the contact rib 430 can be in contact with the mops 402 and 404, the suction nozzle 1 is placed on the floor, and the contact rib 430 presses the mops 402 and 404 by the load of the suction nozzle 1.

[0571] Therefore, the contact rib 430 prevents a gap from being formed between the lower surfaces 420d of the rotating plates 420 and 440 and the upper surfaces of the mops 402 and 404, and thus it is possible to smoothly supply water passing through the water passage holes 424 to the mops 402 and 404.

[0572] <Water supply flow path>

[0573] Figure 35 FIG. 1 is a view illustrating a water supply flow path for supplying water of a water tank to a rotating cleaning unit according to an embodiment of the present invention, Figure 36 FIG. 2 is a view illustrating a valve in a water tank according to an embodiment of the present invention, and Figure 37 FIG. 3 is a view illustrating a state in which the valve opens a discharge port in a state in which the water tank is mounted on a suction nozzle housing.

[0574] Figure 38 FIG. 4 is a view illustrating an arrangement of a rotating plate and a nozzle according to an embodiment of the present invention, and Figure 39 FIG. 5 is a view illustrating an arrangement of a water discharge port of a nozzle in a suction nozzle body according to an embodiment of the present invention.

[0575] Figure 40 FIG. 6 is a conceptual diagram illustrating a process of supplying water in a water tank to a rotating cleaning unit according to an embodiment of the present invention.

[0576] Referring to Figures 35 to 40 , the water supply flow path of the present embodiment includes a first supply pipe 282 connected to a valve operation unit 144, a water pump 270 connected to the first supply pipe 282, and a second supply pipe 284 connected to the water pump 270.

[0577] The water pump 270 can include a first connection port 272 to which the first supply pipe 282 is connected and a second connection port 274 to which the second supply pipe 284 is connected. Based on the water pump 270, the first connection port 272 is an inlet, and the second connection port 274 is a discharge port.

[0578] In addition, the water supply flow path can further include a connector 285 to which the second supply pipe 284 is connected.

[0579] The connector 285 can be formed such that the first, second, and third connection units 285a, 285b, and 285c are arranged in a T shape. The second connection pipe 284 can be connected to the first connection unit 285a.

[0580] The water supply flow path can further include a first branch pipe 286 connected to the second connection unit 285b, and a second branch pipe 287 connected to the third connection unit 285b.

[0581] Accordingly, water flowing through the first branch pipe 286 can be supplied to the first rotary cleaning unit 40, and can flow through the second branch pipe 287 to be supplied to the second rotary cleaning unit 41.

[0582] The connector 285 can be positioned at a central portion of the nozzle main body 10 such that each of the branch pipes 286 and 287 has the same length.

[0583] For example, the connector 285 can be located below the flow path cover 136 and above the flow path forming portion 150. In other words, the connector 285 can be located directly above the second flow path 114. Accordingly, substantially the same amount of water can be distributed to each of the branch pipes 286 and 287 from the connector 285.

[0584] In the present embodiment, the water pump 270 can be located at a point on the water supply flow path.

[0585] At this time, the water pump 270 can be located between the valve operating unit 144 and the first connection unit 285a of the connector 285, so that the water can be discharged from the water tank 200 using the minimum number of water pumps 270.

[0586] In the present embodiment, the water pump 270 can be installed in the nozzle cover 130 in a state in which the water pump 270 is positioned close to the installation position of the valve operating unit 144.

[0587] For example, the valve operating unit 144 and the water pump 270 can be disposed on one side of both sides of the nozzle main body 10 with respect to the center line A2 of the second flow path 114.

[0588] Accordingly, it is possible to reduce the length of the first supply pipe 282, and thus the length of the water supply flow path.

[0589] Each of the branch pipes 286 and 287 can be connected to the nozzle 149. The nozzle 149 can also form the water supply flow path of the present invention.

[0590] The nozzle 149 can include a connection unit 149a connected to each of the branch pipes 286 and 287 as described above.

[0591] The nozzle 149 can further include a water discharge outlet 149b. The water discharge outlet 149b extends downward through the nozzle hole 119. In other words, the water discharge outlet 149b can be disposed outside the mouthpiece housing 100.

[0592] When the water discharge outlet 149b is located outside the mouthpiece housing 100, it is possible to prevent water sprayed via the water discharge outlet 149b from being drawn into the mouthpiece housing 100.

[0593] At this time, an upwardly recessed groove 119a can be formed in the bottom of the mouthpiece base 110, and the water discharge outlet 149b can be positioned in the groove 119a in a state of passing through the nozzle hole 119. In other words, the nozzle hole 119 can be formed in the groove 119a.

[0594] The water discharge outlet 149b can be disposed to face the rotating plates 420 and 440 in the groove 119a. A lower end portion of the water discharge outlet 149b can be disposed at a position lower than the bottom of the mouthpiece base 110. For example, the lower end portion of the water discharge outlet 149b can be disposed to further protrude downward from the bottom of the mouthpiece base 110.

[0595] The lower end portion of the water discharge outlet 149b can be positioned higher than the upper surface 420c of the outer body 420a.

[0596] The distance L4 between the lower end portion of the water discharge outlet 149b and the bottom of the mouthpiece base 110 (or the protruding length from the bottom of the mouthpiece base 110 to the water discharge outlet 149b) is about 2 mm.

[0597] The distance L5 between the lower end portion of the water discharge outlet 149b and the upper surface 420c of the rotating plates 420 and 440 can be longer than the distance L4 between the lower end portion of the water discharge outlet 149b and the bottom of the mouthpiece base 110.

[0598] For example, the distance L5 between the lower end portion of the water discharge outlet 149b and the upper surface of the rotating plates 420 and 440 can be about 3 mm.

[0599] According to the present embodiment, because the lower end portion of the water discharge outlet 149b is located at a position lower than the bottom of the mouthpiece base 110 and higher than the upper surface 420c of the rotating plates 420 and 440, it is possible to prevent interference with the rotating plates during rotation of the rotating plates 420 and 440.

[0600] Water sprayed from the water discharge outlet 149b can pass through the water passage holes 424 of the rotating plates 420 and 440.

[0601] Because the rotating plates 420 and 440 rotate, water discharged from the water discharge outlet 149b can not pass through the water passage holes 424 and can hit the rotating plates 420 and 440.

[0602] In the case of the present embodiment, because the lower end portion of the water discharge port 149b is located at a position lower than the bottom of the nozzle base 110, even if the water discharged from the water discharge port 149b collides with the upper surfaces 420c of the rotating plates 420 and 440, the water is likely to move to the mops 402 and 404. Thus, it is possible to prevent the water that collides with the upper surfaces 420c of the rotating plates 420 and 440 from splashing to the bottom of the nozzle base 110.

[0603] The minimum radius of the water passage hole 424 at the center of the rotating plates 420 and 440 is R2, and the maximum radius of the water passage hole 424 at the center of the rotating plates 420 and 440 is R3.

[0604] The radius from the center of the rotating plates 420 and 440 to the center of the water discharge port 149b is R4. At this time, R4 is greater than R2 and smaller than R3.

[0605] The difference D1 between R3 and R2 is greater than the diameter of the water discharge port 149b.

[0606] In addition, the difference D1 between R3 and R2 is formed to be smaller than the minimum width W1 of the water passage hole 424.

[0607] When the outer diameter of the rotating plates 420 and 440 is R1, R3 can be greater than half of R1.

[0608] A line that perpendicularly connects the center line A1 of the first flow path 112 and the first rotation center C1 can be referred to as a first connection line A6, and a line that perpendicularly connects the center line A1 of the first flow path 112 and the second rotation center C2 can be referred to as a second connection line A7.

[0609] At this time, the first connection line A6 and the second connection line A7 can be located in an area between the pair of nozzles 149 for supplying water to each of the rotating cleaning units 40 and 41.

[0610] In other words, the horizontal distance D3 from the water discharge port 149b to the center line A2 of the second flow path 114 is longer than the horizontal distance D2 from the rotation centers C1 and C2 of each of the rotating plates 420 and 440 to the center line A2 of the second flow path 114.

[0611] This is because the second flow path 114 extends in the front-rear direction at the central portion of the nozzle 1, thereby preventing water from being sucked into the nozzle 1 via the second flow path 114 during rotation of the rotating plate 420.

[0612] The horizontal distance between the water discharge port 149b and the center line A1 of the first flow path 112 is shorter than the horizontal distance between the rotation centers C1 and C2 and the center line A1 of the first flow path 112.

[0613] The water discharge outlet 149b is opposite the axes A3 and A4 of the driving motors 182 and 184 with respect to the connection lines A6 and A7.

[0614] Meanwhile, the valve 230 can include a movable unit 234, an opening and closing unit 238, and a fixed unit 232.

[0615] The fixed unit 232 can be fixed to the fixed rib 217 protruding upward from the first body 210 of the water tank 200.

[0616] The fixed unit 232 can have an opening 232a through which the movable unit 234 passes.

[0617] In a state in which the fixed unit 232 is coupled to the fixed rib 217, the fixed unit 232 restricts the movable unit 234 from moving upward from the fixed unit 232 by a predetermined height.

[0618] The movable unit 234 can move in a vertical direction in a state in which a portion of the movable unit 234 passes through the opening 232a. In a state in which the movable unit 234 moves upward, water can pass through the opening 232a.

[0619] The movable unit 234 can include a first extension portion 234a extending downward and coupled to the opening and closing unit 238, and a second extension portion 234b extending upward and passing through the opening 232a.

[0620] The movable unit 234 can be elastically supported by an elastic member 236. For example, one end of the elastic member 263, which is a coil spring, can be supported by the fixed unit 232, and the other end can be supported by the movable unit 234.

[0621] The elastic member 236 provides a force to the movable unit 234 to move the movable unit 234 downward.

[0622] The opening and closing unit 238 can selectively open the discharge outlet 216 by moving the movable unit 234 upward and downward.

[0623] At least a portion of the opening and closing unit 238 can have a diameter greater than that of the discharge outlet 216, so that the opening and closing unit 238 can block the discharge outlet 216.

[0624] The opening and closing unit 238 can be formed of, for example, a rubber material, so as to prevent water from leaking in a state in which the opening and closing unit 238 blocks the discharge outlet 216.

[0625] The elastic force of the elastic member 236 is applied to the movable unit 234, so that the state in which the opening and closing unit 238 blocks the discharge outlet 216 can be maintained unless an external force is applied to the movable unit 234.

[0626] The movable unit 234 can be moved by the valve operation unit 144 in a process of seating the water tank 200 to the nozzle main body 10.

[0627] As described above, the valve operation unit 144 is coupled to the nozzle cover 130 from below the nozzle cover 130.

[0628] The valve operation unit 144 can include a pressing portion 144a passing through the water passage opening 145. The pressing portion 144a can protrude upward from the bottom of the nozzle cover 130 in a state of passing through the water passage opening 145 of the nozzle cover 130.

[0629] The valve operation unit 144 can form a water flow path together with the bottom of the nozzle cover 130. A connection pipe 144c for connecting the first supply pipe 282 can be provided at one side of the valve operation unit 144.

[0630] The diameter of the water passage opening 145 can be greater than the outer diameter of the pressing portion 144a so that water flows smoothly in a state that the pressing portion 144a passes through the water passage opening 145.

[0631] When the water tank 200 is seated on the nozzle main body 10, the pressing portion 144a is drawn into the discharge port 216 of the water tank 200. In a process that the pressing portion 144a is drawn into the discharge port 216 of the water tank 200, the pressing portion 144a presses the movable unit 234.

[0632] The movable unit 234 is lifted, and the opening and closing unit 238 coupled to the movable unit 234 is moved upward together with the movable unit 234 to be separated from the discharge port 216, thereby opening the discharge port 216.

[0633] Water in the water tank 200 is discharged through the discharge port 216, and is absorbed into the absorption member 147 in the valve operation unit 144 via the water passage 145. The water absorbed by the absorption member 147 is supplied to the first supply pipe 282 connected to the connection pipe 144c.

[0634] The water supplied to the first supply pipe 282 flows into the second supply pipe 284 after being drawn into the water pump 270. The water flowing into the second supply pipe 284 flows to the first branch pipe 286 and the second branch pipe 287 by the connector 285. The water flowing into each of the branch pipes 286 and 287 is sprayed from the nozzles 149 toward the rotating cleaning units 40 and 41.

[0635] The water sprayed from the nozzles 149 is supplied to the mops 402 and 404 after passing through the water passage holes 424 of the rotating plates 420 and 440. The mops 402 and 404 rotate while absorbing the supplied water to wipe the floor.

[0636] In the present embodiment, because the water discharged from the water tank 200 passes through the first supply pipe 282 after passing through the absorption member 147, and the absorption member 147 absorbs the pressure generated by the pumping force of the water pump 270, it is possible to prevent water from suddenly flowing into the connector 285.

[0637] In this case, the water pressure is concentrated on one of the first branch pipe 286 and the second branch pipe 287, and it is possible to prevent water from entering the branch pipe.

[0638] Figure 41 is a perspective view illustrating a nozzle for a cleaner according to an embodiment of the present application separated from a connection pipe, viewed from a rear side, Figure 42 is a cross-sectional view illustrating an 'A' area of Figure 41 , and Figure 43 is a perspective view illustrating a gasket of Figure 42 .

[0639] Referring to Figures 41 to 43 , at least one air hole 219 for introducing external air can be formed in the water tank 200. Hereinafter, for example, one air hole 219 is formed in the water tank 200, but a plurality of air holes 219 can be provided.

[0640] The air hole 219 can be formed on one side of the water tank 200. For example, the air hole 219 can be formed in any one of a pair of front and rear extension walls 215b facing each other in the water tank 200.

[0641] Although the pair of front and rear extension walls 215b are spaced apart from each other to define a space and the connection pipe 50 is located in the space, portions of the front and rear extension walls 215b in which the air hole 219 is formed are spaced apart, thereby being able to smoothly supply air to the air hole 219.

[0642] In detail, the gasket 290 can be press-fitted into the air hole 219.

[0643] The gasket 290 can guide external air into an inner space of the water tank 200.

[0644] The gasket 290 can be referred to as a check valve because external air flows into the water tank 200 while water in the water tank 200 is interrupted so as not to be discharged to the outside.

[0645] The gasket 290 can be formed of a material that is deformed under an external force. For example, the gasket 290 can be formed of a polyethylene material, but is not limited thereto.

[0646] The gasket 290 can include, for example, a cylinder 293.

[0647] An end of one side of the body 293 can be received inside the water tank 200 via the air hole 219. The other end of the body 293 can be exposed to the outside of the water tank 200.

[0648] At least one sealing protrusion 294 and 295 can be formed on the outside of the body 293. The outer diameter of the sealing protrusions 294 and 295 can be greater than the inner diameter of the air hole 219. When the sealing protrusions 294 and 295 are formed as described above, leakage between the body 293 and the air hole 219 can be prevented.

[0649] In the case where a plurality of sealing protrusions 294 and 295 are formed, a portion of the sealing protrusions 294 and 295 can be located inside the water tank 200.

[0650] A flange 292 having an outer diameter greater than the outer diameter of the body 293 and the sealing protrusions 294 and 295 can be formed at the other end of the body 293. The diameter of the flange 292 is greater than the diameter of the air hole 219. The entire gasket 290 is prevented from entering the inside of the water tank 200 by means of the flange 292.

[0651] In addition, the gasket 290 can be formed with an air flow path 291 through which air flows in the central portion thereof, and a slit 297 can be formed at the other end of the gasket 290. At this time, the other end of the gasket 290 can contact water in the water tank 200.

[0652] In addition, in order to block the slit 297 formed at the other end of the gasket 290 by the pressure of water, the gasket 290 is formed such that the cross-sectional area of the gasket 290 decreases from one point to the other end, and thus an inclined surface 296 can be formed on the outside.

[0653] In detail, the inclined surface 296 can be formed on both sides of the slit 297.

[0654] According to one embodiment, water pressure is applied to the inclined surface 296 formed at the other end of the gasket 290, and thus the other end of the gasket 290 is inwardly contracted, in the process of which the slit 297 is blocked in a state in which the pressure inside the water tank 200 is not lowered (a state in which water is not discharged).

[0655] Thus, leakage of water in the water tank 200 to the outside through the slit 297 is prevented.

[0656] In addition, the slit 297 is blocked by the water pressure of the water tank 200, such that air is not supplied to the inside of the water tank 200 via the slit 297 in a state in which no external force is applied to the gasket 290.

[0657] Meanwhile, in a state in which the pressure inside the water tank 200 is lowered (a state in which water is discharged), external air can be supplied to the water tank 200 via the gasket 290.

[0658] Specifically, when the pump motor 280 is operated, the water in the water tank 200 is discharged via the discharge port 216 by means of the water pump 270. The internal pressure of the water tank 200 momentarily decreases.

[0659] At the same time as the pressure applied to the inclined surface 296 of the gasket 290 also decreases, the other end portion of the gasket 290 returns to its initial state and enables the slit 297 to open.

[0660] As described above, when the slit 297 opens, external air can be supplied to the water tank 200 via the slit 297.

[0661] In the state in which the slit 297 is open, the surface tension of the water around the slit 297 and the force for the external air to flow are greater than the water pressure in the water tank 200, so the water is not discharged to the outside of the water tank 200 via the slit 297.

[0662] According to the present embodiment, when the water pump 270 is not operated, it is possible to prevent the water in the water tank 200 from being discharged to the outside via the gasket 290.

[0663] In addition, in the state in which the water pump 270 is operated, because air can be introduced into the water tank 200 via the slit 297 of the gasket 290, it is possible to stably supply the water in the water tank 200 to the mops 402 and 404.

Claims

1. A suction nozzle of a cleaner, the suction nozzle comprising: a suction nozzle housing having a suction flow path through which dust-containing air flows, the suction flow path including a center line extending in a front-rear direction; an upper surface of the suction nozzle for the cleaner, the upper surface of the suction nozzle covering an upper portion of the suction nozzle housing to form a storage space for storing water to be supplied to a plurality of mops; a plurality of rotary cleaning units arranged from a lower side of the suction nozzle housing to be spaced apart from each other in a left-right direction, each of the plurality of rotary cleaning units having a rotary plate configured to be attached to a mop among the plurality of mops; a driving device provided in the suction nozzle housing and having a driving motor configured to drive the plurality of rotary cleaning units; and a water discharge outlet configured to supply water of the storage space to each rotary cleaning unit, wherein: a rotation center of at least one rotary plate is spaced apart from the suction flow path, and a horizontal distance between the center line extending in the front-rear direction and the water discharge outlet is greater than a horizontal distance between the center line extending in the front-rear direction and the rotation center of the at least one rotary plate. The at least one rotary plate includes a water passage hole, and wherein water discharged from the water discharge outlet is configured to pass through the water passage hole.

2. The mouthpiece of claim 1, wherein, The at least one rotary plate includes a plurality of water passage holes arranged to be spaced apart from each other in a circumferential direction with respect to the rotation center of the at least one rotary plate.

3. The mouthpiece of claim 2, wherein, The plurality of rotary cleaning units include a first rotary cleaning unit and a second rotary cleaning unit, and 4. The mouthpiece of claim 1, wherein, wherein the center line extending in the front-rear direction is disposed in a region between a first rotation center of the first rotary cleaning unit and a second rotation center of the second rotary cleaning unit. The driving device includes:

5. The mouthpiece of claim 4, wherein, a first driving device having a first driving motor configured to drive the first rotary cleaning unit; and a second driving device having a second driving motor configured to drive the second rotary cleaning unit. Axes of the first driving motor and the second driving motor are disposed in a region between the first rotation center and the second rotation center.

6. The mouthpiece of claim 5, wherein, The water discharge outlet is disposed on a bottom wall of the suction nozzle housing.

7. The mouthpiece of claim 1, wherein, 8.The suction nozzle of claim 7, at least a portion of the water discharge outlet is disposed outside of the suction nozzle housing. 9.The suction nozzle of claim 8, wherein: a groove is formed in a bottom wall of the suction nozzle housing, wherein the groove is recessed upward and configured to position the water discharge outlet, a hole configured to accommodate the water discharge outlet is formed in the groove, and the water discharge outlet is disposed through the hole in the groove within the suction nozzle housing. A height of a lower surface of the water discharge outlet is greater than or equal to a height of a lower surface of the bottom wall of the suction nozzle housing.

10. The mouthpiece of claim 8, wherein, The height of the lower surface of the water discharge outlet is greater than a height of an upper surface of the rotary plate.

11. The mouthpiece of claim 8, wherein, The height of the lower surface of the water discharge outlet is greater than the height of the upper surface of the rotary plate.

12. The mouthpiece of claim 1, wherein, The suction flow path includes a front-rear flow path extending in the front-rear direction, and The center line extending in the front-rear direction is defined as a center line of the front-rear flow path.

13. The mouthpiece of claim 12, wherein, The suction flow path further includes a left-right flow path configured to communicate with the front-rear flow path and extending in the left-right direction, and The front-rear flow path extending rearward from the left-right flow path is configured to be rotated away from the left-right flow path in a direction toward the center line extending in the front-rear direction.

14. The mouthpiece of claim 13, wherein, A left-right width of a portion of the front-rear flow path extending rearward from the left-right flow path is reduced in a direction away from the left-right flow path.

15. The mouthpiece of claim 13, wherein, A distance between a left-right center line of the left-right flow path and the water discharge outlet is shorter than a distance between a front-rear center line of the front-rear flow path and the water discharge outlet.

16. The mouthpiece of claim 13, wherein, When a perpendicular line connecting a rotation center of the corresponding rotation plate connected to the left-right center line of the left-right flow path is defined, the water discharge outlet is positioned opposite to the axis of the driving motor with respect to the perpendicular line.

17. The mouthpiece of claim 13, wherein, The at least one rotation plate includes:

18. The mouthpiece of claim 2, wherein, an annular outer body; an inner body spaced apart from an inner circumferential surface of the outer body in an inner region of the outer body; and a connection rib configured to connect the inner body and the outer body, wherein an annular water-blocking rib extending in a circumferential direction is formed on an upper surface of the outer body, wherein the water passage hole is formed in an inner region of the water-blocking rib. The connection rib includes inclined surfaces inclined downward on both sides of the connection rib.

19. The mouthpiece of claim 18, wherein, An annular bottom rib is formed to protrude from a bottom wall of the suction nozzle housing, and 20. The mouthpiece of claim 18, wherein, wherein a center of the bottom rib coincides with a center of the water-blocking rib. A diameter of the bottom rib is greater than a diameter of the water-blocking rib.

21. The mouthpiece of claim 20, wherein, The rotation plate further includes a contact rib protruding downward from a lower surface of the outer body and disposed outside the water passage hole.

22. The mouthpiece of claim 18, wherein, A protruding sleeve is formed on a bottom wall of the suction nozzle housing, and 23. The mouthpiece of claim 18, wherein, wherein a groove portion configured to accommodate the protruding sleeve is formed in the inner body. A central portion of the inner body includes a shaft coupling unit configured to be coupled with the driving device, and 24. The mouthpiece of claim 23, wherein, wherein the protruding sleeve is configured to surround the shaft coupling unit. ​

Images