suction nozzle for cleaners

Abstract

This invention provides a suction nozzle for a cleaner. The cleaner nozzle of this invention includes: a nozzle housing having an inlet flow path through which dust-containing air flows; a plurality of rotating cleaning sections disposed below the nozzle housing, each of the rotating cleaning sections having a rotating plate for attaching a mop; a plurality of drive devices disposed inside the nozzle housing and having drive motors for driving the plurality of rotating cleaning sections; and a water tank disposed on the nozzle housing for storing water to be supplied to the mop, wherein the nozzle housing includes a plurality of protruding drive coveres surrounding respective drive devices.

Description

[0001] This invention is a divisional application of the invention patent application with application number 201980026789.9 (international application number: PCT / KR2019 / 004829, application date: April 22, 2019, invention title: cleaner nozzle). Technical Field

[0002] This instruction manual relates to a suction nozzle for a cleaner. Background Technology

[0003] A cleaner is a device that sucks up or wipes away dust or foreign objects from an area that needs cleaning.

[0004] These cleaners can be divided into manual cleaners that clean while the user moves the cleaner directly, and automatic cleaners that clean while moving on their own.

[0005] Manual cleaners can be categorized into canister cleaners, upright cleaners, handheld cleaners, and stick cleaners based on their type.

[0006] These cleaners use nozzles to clean floors. Generally, the nozzles are used to suck up air and dust. Depending on the type of nozzle, it can be attached to a mop for mopping the floor.

[0007] Korean Patent Registration 10-0405244 discloses a suction port assembly for a vacuum cleaner.

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

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

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

[0011] The rotary drive unit includes a rotary motor and gears for transmitting power from the rotary motor to multiple rotating bodies attached to the mop.

[0012] Meanwhile, according to the prior art 1, since a pair of rotating bodies arranged on both sides of the rotary drive unit are rotated by a single rotary motor, if the rotary motor malfunctions or fails, there is a problem that neither of the pair of rotating bodies can rotate.

[0013] In addition, in order to use a rotary motor to rotate a pair of rotating bodies, since the rotary motor is located in the center of the suction port body, a suction path that prevents interference with the rotary motor needs to be designed. Therefore, there are disadvantages such as the increased length of the suction path and the complex structure of the suction path.

[0014] In addition, since the prior art 1 does not have a structure for supplying water to the mop, there is a disadvantage that if the user wants to use a wet mop for cleaning, the user must directly supply water to the mop.

[0015] Furthermore, in the case of prior art 1, since the rotary motor is located in the center of the suction port body, it is difficult to form a suction path in the center of the suction port body, and if a suction path is formed in the center of the suction port body, there is a disadvantage that the height of the suction port body is increased.

[0016] Increasing the height of the suction nozzle body has the disadvantage that it is difficult for the suction nozzle body to enter under furniture or narrow spaces, thus reducing the area that can be cleaned. In addition, the overall size of the suction nozzle body is larger, which causes inconvenience to the user during operation.

[0017] For example, if a user intends to straighten the suction port body but the suction port body moves eccentrically, there is a disadvantage that the weight of the suction port body will further increase the eccentricity, making it difficult for the user to overcome the eccentricity and move the suction port body back to its original straight path.

[0018] On the other hand, Korean Patent Publication No. 10-2017-0028765, which is prior art 2, discloses a cleaner.

[0019] The cleaner disclosed in prior art 2 includes: a cleaner body, on which a mop is rotatably mounted; a water bottle disposed on the cleaner body or on a handle connected to the cleaner body; a spray nozzle configured to spray water onto the front end of the cleaner body; and a water supply unit that supplies water from a water tank to the spray nozzle.

[0020] In the case of prior art 2, because the spray nozzle sprays water forward from the front surface of the cleaner body, the sprayed water may wet other nearby structures instead of the mop.

[0021] The water nozzle is located in the center of the cleaner body, while the mop is arranged horizontally, which means that the mop cannot fully absorb the water sprayed in front of the cleaner body.

[0022] Furthermore, in the case of existing technology 2, since there is no airflow path for suction, there is a disadvantage that it can only wipe the floor, and the user must manually clean the foreign objects on the floor again. Summary of the Invention

[0023] Technical issues

[0024] This embodiment provides a suction nozzle for a cleaner that can suck up foreign objects on the floor while making the overall size of the nozzle smaller and thinner, and clean the floor by rotating the mop and supplying water to the mop.

[0025] This embodiment provides a nozzle for a cleaner, wherein even when a structure is applied that allows the floor to be mopped, the length of the airflow path used for airflow is prevented from increasing, thereby reducing airflow loss.

[0026] This embodiment provides a suction nozzle for a cleaner that evenly distributes the weight of multiple drive units to the left and right sides.

[0027] This embodiment provides a suction nozzle for a cleaner, wherein the drive unit cover is configured to cover the drive device constituting the drive motor and power transmission unit, thereby simplifying the structure of the drive unit cover and preventing the drive unit cover from becoming too large.

[0028] This embodiment provides a suction nozzle for a cleaner, wherein the nozzle facilitates direction change during cleaning.

[0029] Technical solution

[0030] According to one aspect, a suction nozzle for a cleaner includes: a nozzle housing having a suction flow path through which dust-containing air flows; a plurality of rotating cleaning units disposed on the underside of the nozzle housing, each of the plurality of rotating cleaning units including a rotating plate for attaching a mop; a plurality of drive devices having drive motors configured to drive the plurality of rotating cleaning units; and a water tank disposed on the nozzle housing and storing water to be supplied to the mop.

[0031] The nozzle housing may include a plurality of drive unit covers having a protruding shape, the plurality of drive unit covers being arranged around each of the drive units.

[0032] The plurality of rotating cleaning units includes a first rotating cleaning unit and a second rotating cleaning unit, which are arranged on the lower side of the nozzle housing and spaced apart from each other in the lateral direction. Furthermore, each of the first and second rotating cleaning units includes a rotating plate for attaching a mop.

[0033] The plurality of driving devices include: a first driving device having a first driving motor configured to drive the first rotating cleaning unit; and a second driving device having a second driving motor configured to drive the second rotating cleaning unit.

[0034] The nozzle housing may include a plurality of drive unit covers having a protruding shape, the plurality of drive unit covers being arranged around each of the drive units.

[0035] At least one of the plurality of drive unit covers may include a first protruding surface and a second protruding surface, the second protruding surface being positioned above the first protruding surface and having a curvature different from that of the first protruding surface.

[0036] The center of at least one of the plurality of drive unit covers and the center of the second protruding surface are eccentric.

[0037] The axis of each of the drive motors can be arranged at a position offset from the center of the second protruding surface.

[0038] The second protruding surface may be arranged to overlap at least a portion of the drive motor in the vertical direction.

[0039] The axis of each drive motor can extend horizontally.

[0040] The axis of each drive motor can extend in the front-to-back direction.

[0041] The left-right length of the second protruding surface can be greater than the front-back length.

[0042] The length direction of the second protruding surface may intersect with the extension direction of the axis of the drive motor.

[0043] The center of the drive unit cover can be located on the second protruding surface, and the rotation center of the rotating plate can overlap with the second protruding surface in the vertical direction.

[0044] The suction flow path may include a centerline in the front-back direction, and the centerline in the front-back direction may be located between each of the drive unit covers.

[0045] The center of the drive unit cover can be located between the centerline in the front-rear direction and the center of the second protruding surface.

[0046] The axis of the drive motor can be located between the centerline in the front-rear direction and the center of the drive unit cover.

[0047] The center of rotation of each of the rotating plates may be off-center about the center of each of the drive unit covers.

[0048] The center of the drive motor cover can be located between the centerline in the front-rear direction and the rotation center of the rotating plate.

[0049] The axis of the drive motor can be located between the center line in the front-rear direction and the rotation center of the rotating plate.

[0050] The center of the second protruding surface and the rotation center of the rotating plate can be eccentric.

[0051] The central axis that divides the front and rear lengths of the nozzle housing into two equal parts can vertically overlap with the second protruding surface.

[0052] The center of the second protruding surface can be positioned further away from the front end of the nozzle housing than the central axis.

[0053] The rotation center of the rotating plate can be positioned further away from the front end of the nozzle housing than the central axis.

[0054] The center of the drive unit cover can be positioned further away from the front end of the nozzle housing than the central axis.

[0055] Beneficial effects

[0056] According to the proposed implementation, since it can suck up foreign objects from the floor, wipe the floor by rotating the mop, and supply water to the mop, it has the advantage of improved cleaning performance.

[0057] Furthermore, according to this embodiment, even if a structure capable of wiping the floor with a mop is adopted, the increase in the length of the airflow path can be prevented because the drive device is arranged on both sides of the flow path extending in the front-back direction, thus reducing flow path loss.

[0058] Furthermore, according to this embodiment, since each drive device is arranged symmetrically with respect to the front and rear center lines of the suction flow path, it has the advantage that the weight of multiple drive devices is evenly distributed on the left and right sides.

[0059] Furthermore, according to this embodiment, since the drive unit cover covers the drive device constituting the drive motor and transmission unit, the structure of the drive unit cover can be simplified, and the volume of the drive unit cover can be prevented from increasing. Attached Figure Description

[0060] Figure 1 and Figure 2 This is a perspective view showing a suction nozzle for a cleaner according to an embodiment of the present invention.

[0061] Figure 3This is a bottom view showing a suction nozzle for a cleaner according to an embodiment of the present invention.

[0062] Figure 4 This shows the view from the rear. Figure 1 A 3D view of a suction nozzle used in a cleaner.

[0063] Figure 5 It is along Figure 1 A sectional view cut by line AA.

[0064] Figure 6 and Figure 7 This is an exploded perspective view showing a suction nozzle according to an embodiment of the present invention.

[0065] Figure 8 and Figure 9 This is a perspective view of a water tank according to an embodiment of the present invention.

[0066] Figure 10 It is along Figure 8 A sectional view cut by line BB in the middle.

[0067] Figure 11 It is along Figure 8 A sectional view cut by line CC in the middle.

[0068] Figure 12 It is along Figure 8 A sectional view cut by line DD in the middle.

[0069] Figure 13 It is along Figure 8 A sectional view cut by line EE in the middle.

[0070] Figure 14 This is a perspective view showing a suction cap according to an embodiment of the present invention, viewed from above.

[0071] Figure 15 This is a perspective view showing a suction cap according to an embodiment of the present invention, as viewed from below.

[0072] Figure 16 This is a perspective view showing the operating unit, the first connecting unit, and the support body separated from each other in the nozzle cover.

[0073] Figure 17 It is along Figure 14 A sectional view cut by the FF line.

[0074] Figure 18 It is in the state of the first connecting unit connected to the nozzle cover along Figure 17 A sectional view cut by line GG in the middle.

[0075] Figure 19This is a cross-sectional view showing the state in which the first and second connecting units are released by pressing the operating unit.

[0076] Figure 20 This is a view showing the valve operating unit and the seal separated from each other in the nozzle cover according to an embodiment of the present invention.

[0077] Figure 21 This is a view showing the state in which the flow path forming portion is connected to the nozzle base according to an embodiment of the present invention.

[0078] Figure 22 This is a view showing a suction nozzle base according to an embodiment of the present invention, as viewed from below.

[0079] Figure 23 This is a view showing a plurality of switches arranged on a control panel according to an embodiment of the present invention.

[0080] Figure 24 This is a view showing a first drive device and a second drive device according to an embodiment of the present invention, as viewed from below.

[0081] Figure 25 This is a view showing the first and second drive devices according to an embodiment of the present invention, as viewed from above.

[0082] Figure 26 This is a view showing the structure used to prevent the motor housing and drive motor from rotating.

[0083] Figure 27 This is a view showing the state in which the transmission unit is connected to the drive motor according to one embodiment of the present invention.

[0084] Figure 28 This is a view showing the state in which the transmission unit is connected to the drive motor according to another embodiment of the present invention.

[0085] Figure 29 This is a diagram illustrating the relationship between the rotation direction of the rotating plate and the extension direction of the axis of the drive motor according to one embodiment of the present invention.

[0086] Figure 30 This is a plan view showing the state in which the drive device according to one embodiment of the present invention is mounted on the nozzle base.

[0087] Figure 31 This is a front view showing the state in which the drive device according to one embodiment of the present invention is mounted on the nozzle base.

[0088] Figure 32This is a diagram showing the structure of the drive unit cover of the suction cap according to an embodiment of the present invention, and the arrangement relationship between the rotation center of the rotating plate and the drive motor.

[0089] Figure 33 This is a diagram showing a rotating plate according to an embodiment of the present invention, viewed from above.

[0090] Figure 34 This is a diagram showing a rotating plate according to an embodiment of the present invention, as viewed from below.

[0091] Figure 35 This is a view showing the water supply path of a water tank to a rotating cleaning unit according to an embodiment of the present invention.

[0092] Figure 36 This is a view showing a valve in a water tank according to an embodiment of the present invention.

[0093] Figure 37 This is a view showing the valve opening the outlet with the water tank installed on the nozzle housing.

[0094] Figure 38 This is a view showing the arrangement of the rotating plate and the nozzle body according to an embodiment of the present invention.

[0095] Figure 39 This is a view showing the arrangement of the water outlet of the nozzle in the mouthpiece body according to an embodiment of the present invention.

[0096] Figure 40 This is a conceptual diagram illustrating a process of supplying water from a water tank to a rotating cleaning unit according to an embodiment of the present invention.

[0097] Figure 41 This is a perspective view showing a suction nozzle for a cleaner, separated from the connecting tube, according to an embodiment of the invention, as viewed from the rear side.

[0098] Figure 42 It is shown Figure 41 A cross-sectional view of region 'A' in the diagram.

[0099] Figure 43 It is shown Figure 42 A 3D view of the washer. Detailed Implementation

[0100] Figure 1 and Figure 2 This is a perspective view showing a suction nozzle for a cleaner according to an embodiment of the present invention. Figure 3 This is a bottom view showing a suction nozzle for a cleaner according to an embodiment of the present invention. Figure 4 This shows the view from the rear. Figure 1 A 3D view of the nozzle used for a cleaner, and Figure 5 It is along Figure 1 A sectional view cut by line AA.

[0101] refer to Figures 1 to 5 According to an embodiment of the present invention, the nozzle 1 of the cleaner (hereinafter referred to as "nozzle") includes a nozzle body 10 and a connecting tube 50, which is connected to the nozzle body 10 and is movable.

[0102] The suction nozzle 1 of this embodiment can be used, for example, when connected to a handheld cleaner or a canister cleaner.

[0103] In other words, nozzle 1 can be detachably connected to the cleaner or its extension tube. Therefore, when the nozzle is connected to the cleaner or its extension tube, the user can use nozzle 1 to clean the floor. At this time, the cleaner connected to nozzle 1 can separate dust from the air using a multi-cyclone separator method.

[0104] The nozzle 1 itself has a battery that powers the power consumption unit therein, and can also be operated by receiving power from the cleaner.

[0105] Because the cleaner connected to nozzle 1 includes a suction motor, the suction force generated by the suction motor is applied to nozzle 1 to suck up foreign objects and air from the floor at nozzle 1.

[0106] Therefore, in this embodiment, the suction nozzle 1 is capable of sucking up foreign objects and air from the bottom surface and guiding the foreign objects and air to the cleaner.

[0107] Although not limited to this, the connecting tube 50 is connected to the rear central portion of the nozzle body 10 to guide the sucked air to the cleaner.

[0108] In this embodiment, a portion of the nozzle 1 connected to the connecting tube 50 is the rear side of the nozzle 1, and the opposite side of the connecting tube 50 is the front side of the nozzle 1.

[0109] Alternative location, regarding Figure 3 The upper part is the front side of the nozzle 1, and the lower part is the rear side of the nozzle 1.

[0110] The nozzle 1 may also include rotating cleaning units 40 and 41 rotatably arranged below the nozzle body 10.

[0111] For example, a pair of rotating cleaning units 40 and 41 can be arranged in the lateral direction. This pair of rotating cleaning units 40 and 41 can rotate independently. For example, the nozzle 1 may include a first rotating cleaning unit 40 and a second rotating cleaning unit 41.

[0112] Rotary cleaning units 40 and 41 may each include mops 402 and 404. For example, mops 402 and 404 may be formed in a disc shape. Mops 402 and 404 may include a first mop 402 and a second mop 404.

[0113] The nozzle body 10 may include a nozzle housing 100 forming an external shape. The nozzle housing 100 may include suction flow paths 112 and 114 for drawing air.

[0114] The suction flow paths 112 and 114 include: a first flow path 112 that extends laterally in the nozzle housing 100; and a second flow path 114 that communicates with the first flow path 112 and extends in the front-back direction.

[0115] The first flow path 112 may be formed, for example, on the front end portion of the lower surface of the nozzle housing 100.

[0116] 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 the central portion of the first flow path 112 toward the connecting pipe 50.

[0117] Therefore, the centerline A1 of the first flow path 112 can extend in the horizontal direction. The centerline A2 of the second flow path 114 can extend in the front-back direction and intersect with the centerline A1 of the first flow path 112. However, the centerline A2 of the second flow path 114 may not be horizontal, but may be inclined in the front-back direction.

[0118] In this embodiment, the center line A2 of the second flow path 114 can be referred to as the center line of the suction flow path in the front-to-back direction.

[0119] The centerline A2 of the second flow path 114 can be positioned, for example, at a position approximately halfway between the nozzle body 10.

[0120] With the rotating cleaning units 40 and 41 connected to the lower side of the nozzle body 10, a portion of the mops 402 and 404 protrudes outward from the nozzle 1. Therefore, the rotating cleaning units 40 and 41 can clean not only the floor directly below the nozzle, but also the floor outside the nozzle 1.

[0121] For example, mops 402 and 404 can protrude not only to the sides of nozzle 1, but also to the rear of nozzle 1.

[0122] Rotary cleaning units 40 and 41 can be positioned, for example, from below the nozzle body 10 on the rear side of the first flow path 112.

[0123] Therefore, when the suction nozzle 1 moves forward and cleans, foreign objects and air on the floor are sucked up by the first flow path 112, and the floor can be cleaned by the mop 402, 404.

[0124] In this embodiment, the first rotation center C1 of the first rotating cleaning unit 40 (e.g., the rotation center of the rotating plate 420) and the second rotation center C2 of the second rotating cleaning unit 41 (e.g., the rotation center of the rotating plate 440) are arranged in the lateral direction with the two units spaced apart from each other.

[0125] The centerline A2 of the second flow path 114 can be located in the region between the first rotation center C1 and the second rotation center C2.

[0126] The central axis Y, which divides the front and rear length L1 of the nozzle body 10 (excluding the extension portion) into two equal parts, can be positioned in front of the rotation centers C1 and C2 of each rotating cleaning unit 40 and 41.

[0127] Compared to the central axis Y that bisects the front-to-back length L1 of the nozzle body 10, the rotation centers C1 and C2 of each rotating cleaning unit 40 and 41 can be located further away from the front end of the nozzle body 10. This is to prevent the rotating cleaning units 40 and 41 from blocking the first flow path 112.

[0128] Therefore, the front-to-back horizontal distance L3 between the central axis Y and the rotation centers C1 and C2 of each rotating cleaning unit 40 and 41 can be set to a value greater than zero.

[0129] Furthermore, the distance L2 between the rotation centers C1 and C2 of the rotating cleaning units 40 and 41 can be made larger than the diameter of each mop 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 interference.

[0130] The diameters of mops 402 and 404 are preferably 0.6 times or more than half the width of the nozzle body 10, but are not limited thereto. In this case, with the help of mops 402 and 404, the cleaning area of ​​the floor facing the nozzle body 10 is increased, and the cleaning area of ​​the floor not facing the nozzle body 10 is also increased. In addition, when cleaning with the nozzle 1, even with slight movement, the area cleaned by mops 402 and 404 can be guaranteed.

[0131] Furthermore, mops 402 and 404 may be equipped with sewing threads 405. The sewing threads 405 may be positioned at the edges of mops 402 and 404 with spacing between them along the center direction. Mops 402 and 404 may be composed of multiple fiber materials, and the fiber materials may be bonded together by means of the sewing threads 405.

[0132] At this point, the diameters of the rotating plates 420 and 440 (described later) can be larger than the diameter of a portion of the sewing thread 405 relative to the center of the mops 402 and 404. The diameters of the rotating plates 420 and 440 can be smaller than the outer diameters of the mops 402 and 404.

[0133] In this configuration, the rotating plates 420 and 440 can support the portions of mops 402 and 404 positioned outside the sewing thread 405, thereby reducing the distance between mops 402 and 404 and preventing mutual friction or vertical overlap between mops 402 and 404 caused by deformation of the mops 402 and 404 due to pressing the edge portions.

[0134] The nozzle housing 100 may include a nozzle base 110 and a nozzle cover 130 connected to the upper side of the nozzle base 110.

[0135] The nozzle base 110 may have a first flow path 112. The nozzle housing 100 may also include a flow path forming portion 150, which together with the nozzle base 110 forms a second flow path 114.

[0136] The flow path forming portion 150 can be connected to the upper central portion of the nozzle base 110, and the end of the flow path forming portion 150 can be connected to the connecting tube 50.

[0137] Therefore, because of the arrangement of the flow path forming portion 150, the second flow path 114 can extend in a roughly straight line in the front-back direction, so the length of the second flow path 114 can be minimized, thereby minimizing the flow path loss in the nozzle 1.

[0138] The front portion of the flow path forming portion 150 may cover the upper side of the first flow path 112. The flow path forming portion 150 may be arranged to slope upward from the front end to the rear.

[0139] Therefore, the height of the front part of the flow path forming portion 150 can be lower than the height of the rear part of the flow path forming portion 150.

[0140] According to this embodiment, because the front of the flow path forming portion 150 is low, it has the advantage of reducing the overall height of the nozzle 1. The lower the height of the nozzle 1, the more likely it is to be pulled into the narrow space under the furniture or chair to be cleaned.

[0141] The nozzle base 110 may include an extension 129 for supporting the connecting tube 50. The extension 129 may extend rearward from the rear end of the nozzle base 110.

[0142] The connecting tube 50 may include: a first connecting tube 510 connected to the end of the flow path forming portion 150; a second connecting tube 520 rotatably connected to the first connecting tube 510; and a guide tube 530 for communicating the first connecting tube 510 and the second connecting tube 520.

[0143] The first connecting tube 510 can be mounted on the extension portion 129, and the second connecting tube 520 can be connected to the extension tube or hose of the cleaner.

[0144] Multiple rollers for smooth movement of the nozzle 1 can be provided on the lower side of the nozzle base 110.

[0145] 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 lateral direction.

[0146] According to this 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 of the nozzle base 110, thereby increasing the area that can be cleaned using the nozzle 1.

[0147] As the distance from the front end of the nozzle base 110 to the first flow path 112 increases, the area in front of the first flow path 112 where suction force should not be applied during cleaning increases, and therefore, the area that is not cleaned increases.

[0148] On the other hand, according to this embodiment, the distance from the front end of the nozzle base 110 to the first flow path 112 can be minimized, thereby increasing the cleanable area.

[0149] Furthermore, 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 lateral direction can be maximized.

[0150] In other words, it is possible to minimize the distance between the two ends of the first flow path 112 and the two ends of the nozzle base 110.

[0151] In this embodiment, the first roller 124 can be positioned in the space between the first flow path 112 and the first mop 402. The second roller 126 can be positioned in the space between the first flow path 112 and the second mop 404.

[0152] The first roller 124 and the second roller 126 can be rotatably connected to the shaft 125. The shaft 125 can be fixed to the underside of the nozzle base 110 in a state in which it extends in the lateral direction.

[0153] The distance between the shaft 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 rotating plate described later).

[0154] At least a portion of each of the rotating cleaning units 40 and 41 (mop and / or rotating plate) may be positioned between the shaft 125 of the first roller 124 and the shaft 125 of the second roller 126.

[0155] With this arrangement, the rotating cleaning units 40 and 41 can be positioned as close as possible to the first flow path 112, and the area of ​​the floor where the nozzle 1 is located that is cleaned by the rotating cleaning units 40 and 41 can be increased, thereby improving the floor cleaning performance.

[0156] The number of rollers is not limited to a specific number, but the nozzle 1 can be supported at three points. In other words, the multiple rollers may also include a third roller 129a disposed on the extension 129 of the nozzle base 110.

[0157] The third roller 129a can be positioned behind the mops 402 and 404 to prevent interference with the mops 402 and 404.

[0158] With mops 402 and 404 placed on the floor, they are pressed against the floor and in close contact with it, thereby increasing the friction between the mops 402 and 404 and the bottom surface. In this embodiment, because multiple rollers are connected to the underside of the nozzle base 110, the mobility of the nozzle 1 can be improved by means of the multiple rollers.

[0159] Meanwhile, the nozzle body 10 may also include a water tank 200 to supply water to the mops 402 and 404.

[0160] The water tank 200 can be detachably connected to the nozzle housing 100. Water in the water tank 200 can be supplied to each mop 402 and 404 while the water tank 200 is mounted on the nozzle housing 100.

[0161] The water tank 200 can form the appearance of the nozzle 1 when it is placed on the nozzle housing 100.

[0162] The entire upper sidewall of the water tank 200 essentially forms the appearance of the upper surface of the nozzle 1. Therefore, the user can easily identify whether the water tank 200 is in place or whether the water tank 200 is separated from the nozzle housing 100.

[0163] The nozzle body 10 may also include an operation unit 300, which is operated to separate the water tank 200 when the water tank 200 is placed on the nozzle housing 100.

[0164] For example, the operating unit 300 may be disposed in the nozzle housing 100. The nozzle housing 100 may be provided with a first connection unit 310 for connection with the water tank 200, and the water tank 200a may be provided with a second connection unit 254 for connection with the first connection unit 310.

[0165] The operating unit 300 can be arranged to move vertically within the nozzle housing 100. The first connecting unit 310 can move under the operating unit 300 under the operating force of the operating unit 300.

[0166] For example, the first connecting unit 310 can move in the back-and-forth direction. To this end, the operating unit 300 and the first connecting unit 310 may include inclined surfaces that are in contact with each other.

[0167] When the operating unit 300 is lowered by means of the inclined surface, the first connecting unit 310 can move horizontally (e.g., in the front-back direction).

[0168] The first connecting unit 310 includes a hook 312 for engaging with the second connecting unit 254, and the second connecting unit 254 includes a groove 256 for inserting the hook 312.

[0169] The first connecting unit 310 can be elastically supported by the second elastic member 314 to maintain the connection between the first connecting unit 310 and the second connecting unit 254.

[0170] Therefore, when the hook 312 is inserted into the groove 256 by means of the second elastic member 314 and the operating unit 300 is pressed down, the hook 312 separates from the groove 256. With the hook 312 disengaged from the groove 256, the water tank 200 can be separated from the suction nozzle housing 100.

[0171] The suction nozzle 1 may also include a support 320 for raising the second connecting unit 254 of the water tank 200 when the hook 312 is retracted from the slot 256. The operation of raising the second connecting unit 254 by the support 320 will be described later with reference to the accompanying drawings.

[0172] In this embodiment, the operation unit 300 may be positioned, for example, directly above the second flow path 114. For example, the operation unit 300 may be arranged to overlap with the center line A2 of the second flow path 114 in the vertical direction.

[0173] Therefore, since the operation unit 300 is located in the central part of the nozzle 1, it has the advantage that the user can easily identify and operate the operation unit 300.

[0174] Additionally, the nozzle body 10 may include an adjustment unit 180 for adjusting the amount of water discharged from the water tank 200. For example, the adjustment unit 180 may be located at the rear of the nozzle housing 100.

[0175] 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.

[0176] Alternatively, the amount of water discharged from the water tank 200 can be adjusted by the adjusting unit 180. For example, when the adjusting 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 is discharged from the water tank 200 per unit time, the second amount being greater than the first amount.

[0177] The adjustment unit 180 can be pivotally mounted to the nozzle housing 100 in the lateral direction, or it can be pivotally mounted in the vertical direction.

[0178] For example, when the adjustment unit 180 is in the neutral position (e.g.) Figure 4 As shown in the figure, 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, the first amount of water can be discharged from the water tank 200 per unit time.

[0179] When the regulating unit 180 is pushed to the right by pushing its right side, a second amount of water can be discharged from the water tank 200 per unit time. The construction of the regulating unit 180 for detecting operation will be described later with reference to the accompanying drawings.

[0180] Figure 6 and Figure 7 This is an exploded perspective view of a suction nozzle according to an embodiment of the present invention, and Figure 8 and Figure 9 This is a perspective view of a water tank according to one embodiment of the present invention.

[0181] Figure 3 as well as Figures 6 to 9 The nozzle body 10 may also include multiple drive units 170 and 171 for individually driving each rotating cleaning unit 40 and 41.

[0182] The plurality of drive devices 170 and 171 may include a first drive device 170 for driving the first rotating cleaning unit 40 and a second drive device 171 for driving the second rotating cleaning unit 41.

[0183] Because each of the drive units 170 and 171 operates independently, there is an advantage that even if some of the drive units 170 and 171 fail, the rotating cleaning device can still rotate with the help of the other drive unit.

[0184] The first drive unit 170 and the second drive unit 171 can be spaced apart from each other in the lateral direction in the nozzle body 10.

[0185] Drive units 170 and 171 can be positioned after the first flow path 112.

[0186] For example, at least a portion of the second flow path 114 may be positioned between the first drive device 170 and the second drive device 171. In this case, the first drive device 170 and the second drive device 171 may be arranged symmetrically with respect to the center line A2 of the second flow path 114.

[0187] Therefore, even if multiple drive units 170 and 171 are provided, the second flow path 114 will not be affected, thus the length of the second flow path 114 can be minimized.

[0188] According to this embodiment, since the first driving device 170 and the second driving device 171 are arranged on both sides of the second flow path 114, the weight of the nozzle 1 can be evenly distributed to the left and right sides, thereby preventing the center of gravity of the nozzle 1 from shifting to either side of the nozzle 1.

[0189] Multiple drive units 170 and 171 can be arranged in the nozzle body 10. For example, multiple drive units 170 and 171 can be seated on the upper side of the nozzle base 110 and covered by the nozzle cover 130. In other words, multiple drive units 170 and 171 can be located between the nozzle base 110 and the nozzle cover 130.

[0190] Each of the rotating cleaning units 40 and 41 may further include rotating plates 420 and 440, which rotate by receiving power from each of the drive units 170 and 171.

[0191] Rotating plates 420 and 440 may include: a first rotating plate 420 connected to the first drive unit 170 and attached to the first mop 402; and a second rotating plate 440 connected to the second drive unit 171 and attached to the second mop 440.

[0192] Rotating plates 420 and 440 can be formed in a disc shape, and mops 402 and 404 can be attached to the bottom surface of rotating plates 420 and 440.

[0193] Rotating plates 420 and 440 can be connected to the respective drive units 170 and 171 on the underside of the nozzle base 110. In other words, rotating plates 420 and 440 can be connected to the drive units 170 and 171 on the outside of the nozzle housing 100.

[0194] <Water Tank>

[0195] Figure 10 It is along Figure 8 A sectional view cut by line BB in the middle. Figure 11 It is along Figure 8 A sectional view cut by line CC in the middle. Figure 12 It is along Figure 8 The sectional view cut by line DD in the middle, and Figure 13 It is along Figure 8 A sectional view cut by line EE in the middle.

[0196] refer to Figures 8 to 13 The water tank 200 can be mounted on the upper side of the nozzle housing 100. For example, the water tank 200 can sit on the nozzle cover 130. With the water tank 200 mounted on the upper side of the nozzle cover 130, the upper sidewall of the water tank 200 can form part of the appearance of the upper surface of the nozzle body 10. For example, the water tank 200 can protrude upward from the nozzle cover 130.

[0197] The water tank 200 may include a first body 210 and a second body 250, the second body 250 being connected to the first body 210 and together defining a chamber for storing water. The second body 250 may be connected to the upper side of the first body 210.

[0198] The second body 250 can protrude substantially upward from the nozzle cap 130 to form the appearance of the upper surface of the nozzle 1. Although not limited thereto, the entire upper surface wall of the second body 250 can form the appearance of the upper surface of the nozzle 1.

[0199] The chamber may include: a first chamber 222 located above the first drive unit 170; a second chamber 224 located above the second drive unit 171; and a connecting chamber 226 connecting the first chamber 222 and the second chamber 224.

[0200] The first body 210 can define the bottom and side walls of the chamber, and the second body 250 can define the top wall of the chamber. Of course, a portion of the second body 250 can also define the top wall of the chamber.

[0201] In this embodiment, the volume of the connecting chamber 226 can be made smaller than that of the first chamber 222 and the second chamber 224, so as to increase the water storage capacity while minimizing the height of the suction nozzle 1 through the water tank 200.

[0202] The water tank 200 can be configured with a low front and a high rear. The upper surface of the water tank 200 can be sloped upwards or rounded from the front to the rear.

[0203] For example, the connecting chamber 226 can connect to the first chamber 222 and the second chamber 224 located on both sides at the front of the water tank 200. In other words, the connecting chamber 226 can be positioned at the front of the water tank 200.

[0204] The water tank 200 may include a first bottom wall 213a. For example, the first body 210 may include a first bottom wall 213a.

[0205] The first bottom wall 213a is the wall located at the lowest position in the water tank 200.

[0206] The first bottom wall 213a is a horizontal wall and can sit on the bottom wall 131a of the nozzle cover 130, which will be described later.

[0207] The first bottom wall 213a may be the bottom wall located at the frontmost part of the water tank 200.

[0208] The first bottom wall 213a may include: a first wall portion 214a extending in a left-right direction; and a pair of second wall portions 214b extending in a front-back direction at both ends of the wall portion 214a. The left-right length of the wall portion 214a may be substantially the same as the left-right length of the first body 210.

[0209] The width of each second wall portion 214b in the lateral direction is formed to be larger than the width of the first wall portion 214a in the front-back direction.

[0210] At this time, the lateral width of the second wall portion 214b is the largest in the portion adjacent to the first wall portion 214a, and can decrease in the portion away from the first wall portion 214a.

[0211] An outlet 216 for discharging water from the water tank 200 may be formed in either of the pair of second wall portions 214b.

[0212] Alternatively, the outlet 216 may be formed at the boundary between one of a pair of second wall portions 214b and the first wall portion 214a.

[0213] The outlet 216 can be opened or closed by means of valve 230. Valve 230 can be arranged in water tank 200. Valve 230 can be operated by external force, and unless an external force is applied to valve 230, valve 230 keeps outlet 216 closed.

[0214] Therefore, when the water tank 200 is separated from the nozzle body 10, water can be prevented from being discharged from the water tank 200 through the outlet 216.

[0215] In this embodiment, the water tank 200 may include a single outlet 216. The reason for providing a single outlet 216 to the water tank 200 is to reduce the number of components that may cause water leakage.

[0216] In other words, the nozzle 1 has components (control panel, drive motor, etc.) that operate when receiving electricity, and these components must be completely cut off from contact with water. In order to prevent contact between the components and water, leakage in the parts through which the water supply exits from the water tank 200 is essentially minimized.

[0217] Because additional structures are needed to prevent water leakage, the structure becomes more complex as the number of outlets 216 in the water tank 200 increases, and even if structures are provided to prevent water leakage, there is a possibility that water leakage cannot be completely prevented.

[0218] Furthermore, as the number of outlets 216 in the water tank 200 increases, the number of valves 230 used to open and close the outlets 216 also increases. This means that, due to the valves 230, not only is the number of components increased, but the volume of the chamber in the water tank 200 used for storing water is also reduced.

[0219] Because the rear side of the water tank 200 is higher than the front side of the water tank 200, in order to allow the water in the water tank 200 to drain smoothly, an outlet 216 is formed on the first bottom wall 213a at the lowest position of the first body 210.

[0220] The first body 210 may further include a second bottom wall 213b, which is positioned at a different height from the first bottom wall 213a.

[0221] The second bottom wall 213b is located behind the first bottom wall 213a and is higher than the first bottom wall 213a. In other words, the height difference between the first bottom wall 213b and the second bottom wall 213b is H2.

[0222] The second bottom wall 213b can be a horizontal wall or an upwardly rounded curved wall.

[0223] The second bottom wall 213b can be located directly above the drive units 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 will not interfere with the drive units 170 and 171.

[0224] 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.

[0225] In this embodiment, a portion or all of the second bottom wall 213b has the highest height among the bottom walls.

[0226] The second bottom wall 213b can be formed to have a left-right width that is greater than the front-back width.

[0227] The first body 210 may further include a third bottom wall 213c, which is positioned at a different height from the first bottom wall 213a and the second bottom wall 213b.

[0228] The third bottom wall 213c is located at a position that is higher than the first bottom wall 213a and lower than the second bottom wall 213b.

[0229] Therefore, the height difference between the third bottom wall 213c and the first bottom wall 213a is H1, and H1 is less than H2.

[0230] The third bottom wall 213c can be located behind the second bottom wall 213a.

[0231] A portion of the third bottom wall 213c is located at the rear end of the first body 210.

[0232] In this embodiment, since the third bottom wall 213c is located at a lower position than the second bottom wall 213b, the water storage capacity in the water tank 200 can be increased without interfering with the surrounding structure.

[0233] The first body 210 may further include a fourth bottom wall 213d extending downward from the edge of the second bottom wall 213b into an inclined shape. The fourth bottom wall 213d may surround the second bottom wall 213b.

[0234] The fourth bottom wall 213d can extend downwards while being rounded.

[0235] The first body 210 may also include a fifth bottom wall 213e, which extends downwardly from the outer periphery of the fourth bottom wall 213d.

[0236] In other words, the height decreases from the second bottom wall 213b toward the fourth bottom wall 213d and the fifth bottom wall 213e.

[0237] The fifth bottom wall 213e can connect to the fourth bottom wall 213d and the second bottom wall 213e.

[0238] In addition, the fifth bottom wall 213e can connect the fourth bottom wall 213d and the first bottom wall 213a.

[0239] A portion of the bottom wall of the first body 210 can form recessed receiving spaces 232 and 233 by means of the second bottom wall 213b, the fourth bottom wall 213d, and the fifth bottom wall 213e. The drive units 170 and 171 can be located in the receiving spaces 232 and 233.

[0240] Therefore, a portion of the bottom wall of the first body 210 may surround the outer periphery of each drive unit.

[0241] The first body 210 may further include a sixth bottom wall 213f, which is located behind each second wall portion 214b and positioned above each second wall portion 214b. The sixth bottom wall 213f may be positioned below the third bottom wall 213c.

[0242] The third bottom wall 213c can be connected to the sixth bottom wall 213f by means of the connecting wall 215g.

[0243] Therefore, even though the third bottom wall 213c is located behind and lower than the second bottom wall 213c, water on the second bottom wall 213c can still flow to the sixth bottom wall 213f via the connecting wall 215g. Water on the sixth bottom wall 213f can then flow to the first bottom wall 213a.

[0244] The first wall portion 214a of the first bottom wall 213a and the second body 250 can define the connection flow path 226.

[0245] Because the first bottom wall 213a, located at the lowest position as described above, forms a connecting flow path 226, the water in the first chamber 222 and the second chamber 224 can flow evenly to the outlet 216.

[0246] The first body 210 may further include a first sidewall 215a extending upward from a first wall portion 214a of a first bottom wall 213a. The first sidewall 215a may be the front wall of the first body 210.

[0247] The first sidewall 215a can extend vertically upward from the front end of the first wall portion 214a.

[0248] The first body 210 may further include a second sidewall 215b extending upward from the second wall portion 214b of the first bottom wall 213a.

[0249] In other words, a pair of second sidewalls 215b extend rearward from both sides of the first sidewall 215a, and the height of the second sidewalls 215b increases with the distance from the first sidewall 215a.

[0250] A pair of second sidewalls 215b may include a left sidewall and a right sidewall. In this case, the left sidewall may form a first chamber 222, and the right sidewall may form a second chamber 224.

[0251] It can be formed with inlets for introducing water into one or more of a pair of second sidewalls 215b.

[0252] Figure 6 The state in which an entrance is formed in each of a pair of second sidewalls 215b is shown.

[0253] For example, the left side wall may have a first inlet 211 for introducing water into the first chamber 222, and the right side wall may have a second inlet 212 for introducing water into the second chamber 224.

[0254] At this time, each second sidewall 215b may include an inwardly recessed portion 215e, and the recessed portion 215e may be provided with each of the inlets 211 and 212.

[0255] The first entrance 211 may be covered by the first entrance cover 240, and the second entrance 212 may be covered by the second entrance cover 242.

[0256] For example, each inlet cover 240 and 242 can be formed of rubber material.

[0257] Inlet covers 240 and 242 can cover inlets 211 and 212 in a state where they are received in recesses 215e. In this case, the dimensions of inlet covers 240 and 242 are smaller than the dimensions of recesses 215e.

[0258] Therefore, a portion of the recessed portion 215e is covered by the inlet covers 240, 242, while the other portion is not covered by the inlet covers 240, 242, thus forming a space 215f in which a user's finger can be inserted.

[0259] Therefore, after inserting a finger into space 215f, the inlet covers 240 and 242 can be pulled to open inlets 211 and 212.

[0260] According to this embodiment, the water tank 200 is provided with each of the inlets 211 and 212 located on both sides of the water tank 200, so that water can be easily introduced into the water tank 200 by opening either of the two inlets.

[0261] The inlet covers 240 and 242 can be positioned between the space 215f and the first sidewall 215a to ensure the dimensions of the space 215f.

[0262] The first body 210 may further include a third sidewall 215c extending upward from the rear end of the third bottom wall 213c.

[0263] Additionally, the first body 210 may also include a front and rear extending wall 215d, which extends forward from the end of the third side wall 215c and connects to the third bottom wall 213c, the fourth bottom wall 213d and the fifth bottom wall 213e.

[0264] 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.

[0265] A pair of front and rear extension walls 215d are arranged facing each other. When the water tank 200 is seated on the nozzle housing 100, the connecting pipe 50 can be positioned between the pair of front and rear extension walls 215d.

[0266] A pair of front and rear extension walls 215d are located at a position higher than the first bottom wall 213a.

[0267] In this embodiment, the chamber is formed by a first body 210 and a 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.

[0268] The height difference between the first bottom wall 213a and the second body 250 is H4. At this point, H4 is greater than H3. This structure has the advantage of increasing water storage capacity while reducing the height (or total thickness) of the water tank 200.

[0269] The first body 210 may include a first slot 218 to prevent interference with the operating unit 300 and the connecting units 310 and 254. The first slot 218 may be formed such that the central rear end portion of the first body 210 is recessed forward. In this case, a pair of front and rear extending walls 215d may form part of the first slot 218.

[0270] Additionally, the second body 250 may include a second slot 252 for preventing interference with the operating unit 300. The second slot 252 may be formed such that the central rear end portion of the second body 250 is recessed forward.

[0271] The second body 250 may further include a slot cover 253 that covers a portion of the first slot 218 of the first body 210 when connected to the first body 210. In other words, the front-to-back length of the second slot 252 is shorter than the front-to-back length of the first slot 218.

[0272] The second connecting unit 254 can extend downward from the slot cover 253. Therefore, the second connecting unit 254 can be located within the space formed by the first slot 218.

[0273] Therefore, when observing the overall shape of the water tank 200, the length of the water tank 200 in the lateral direction is longer than the length of the water tank 200 in the front-to-back direction. The front-to-back length of the central part of the water tank 200 (where slots 218 and 252 are located) is shorter than the front-to-back length of the two sides.

[0274] The water tank 200 has a symmetrical shape with respect to slots 218 and 252.

[0275] The water tank 200 may also include connecting ribs 235 and 236 for connecting to the nozzle cover 130 before the second connecting unit 254 of the water tank 200 is connected to the first connecting unit 310.

[0276] The connecting ribs 235 and 236 also serve to guide the water tank 200 in the connection position within the nozzle cover 130 before the second connecting unit 254 of the water tank 200 is connected to the first connecting unit 310. For example, multiple connecting ribs 235 and 236 protrude from the first body 210 and can be arranged to be spaced apart in the left-right horizontal direction.

[0277] Although unrestricted, multiple connecting ribs 235 and 236 may protrude forward from the first sidewall 215a of the first body 210 and may be spaced apart from each other in the lateral direction.

[0278] Each of the drive devices 170 and 171 is disposed in the nozzle body 10 such that a portion of the nozzle body 10 protrudes upward on both sides of the second flow path 114 due to each of the drive devices 170 and 171.

[0279] According to this embodiment, the portion protruding from the nozzle 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 parts by means of the first slot 218.

[0280] <Sucking Cap>

[0281] Figure 14 This is a perspective view showing a suction cap according to an embodiment of the present invention, viewed from above. Figure 15 This is a perspective view showing a suction cap according to an embodiment of the present invention, as viewed from below.

[0282] refer to Figure 6 , Figure 14 and Figure 15 The nozzle cover 130 may include a bottom wall 131a and a peripheral wall 131b, the peripheral wall 131b extending upward at the edge of the bottom wall 131a.

[0283] The nozzle cover 130 may include drive unit covers 132 and 134, which cover the upper side of each drive unit 170 and 171.

[0284] Each drive unit cover 132 and 134 is a portion that protrudes upward from the bottom wall 131a of the nozzle cover 130. Drive unit covers 132 and 134 can be separated from the peripheral wall 131b. Therefore, a space can be formed between the drive unit covers 132 and 134 and the peripheral wall 131b, and the water tank 200 can be located in this space.

[0285] Therefore, it is possible to prevent the height of the nozzle 1 from increasing due to the water tank 200 when the water tank 200 is placed on the nozzle cover 130, while increasing the storage capacity of the water tank 200.

[0286] Each of the drive unit covers 132 and 134 is an upwardly projecting portion from the nozzle cover 130. Each of the drive unit covers 132 and 134 can surround the upper side of the drive units 170 and 171 without interfering with each of the drive units 170 and 171 mounted in the nozzle base 110. In other words, the drive unit covers 132 and 134 are spaced apart from each other in the lateral direction within the nozzle cover 130.

[0287] When the water tank 200 is seated on the nozzle 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 the components.

[0288] Additionally, in the water tank 200, the first chamber 222 and the second chamber 224 can be arranged to surround the periphery of each of the respective drive unit covers 132 and 134.

[0289] Therefore, according to this embodiment, the volume of the first chamber 222 and the second chamber 224 can be increased.

[0290] Compared to the drive unit covers 132 and 134, the first body 210 of the water tank 200 can be positioned further below the nozzle cover 130.

[0291] At least a portion of the bottom wall of the water tank 200 may be positioned below the axis of the drive motor, which will be described later (see [link]). Figure 31 (A3 and A4 in the text), thereby minimizing the increase in height due to water tank 200.

[0292] For example, the first bottom wall 213a of the water tank 200 can be positioned below the axis (A3 and A4) of the drive motor, which will be described later.

[0293] The nozzle cover 130 may also include a flow path cover 136 covering the flow path forming portion 150. The flow path cover 136 may be positioned between the drive unit covers 132 and 134 and may be arranged at a position corresponding to the first slot 218 of the water tank 200.

[0294] The nozzle cover 130 can also protrude upward from the bottom wall 131a of the nozzle cover 130.

[0295] In this embodiment, in order to increase the water storage capacity of the water tank 200, a portion of the water tank 200 may be located on both sides of the flow path cover 136. Therefore, while preventing interference between the water tank 200 and the second flow path 114, the water storage capacity of the water tank 200 can be increased.

[0296] Furthermore, to prevent the water tank 200 from colliding with the structures surrounding the nozzle 1 during its movement, the entire water tank 200 can be arranged to overlap with the nozzle housing 100 in the vertical direction. In other words, the water tank 200 does not need to protrude along the lateral or longitudinal directions of the nozzle housing 100.

[0297] The first bottom wall 213a of the water tank 200 can sit on the bottom wall 131a of the nozzle 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.

[0298] When the water tank 200 is placed on the nozzle cover 130, the slot cover 253 is located in front of the operating unit 300.

[0299] When the water tank 200 is placed on the nozzle cover 130, the first body 210 can be surrounded by the peripheral wall 132b of the nozzle cover 130. Therefore, when the water tank 200 is placed on the nozzle cover 130, the inlet covers on both sides of the water tank 200 are covered by the peripheral wall 132b of the nozzle cover 130 and are not exposed to the outside.

[0300] The nozzle cover 130 may further include rib insertion holes 141 and 142, into which connecting ribs 235 and 236 disposed in the water tank 200 are inserted. The rib insertion holes 141 and 142 may be spaced apart from the nozzle cover 130 in the lateral horizontal direction.

[0301] Therefore, with the connecting ribs 235 and 236 inserted into the rib insertion holes 141 and 142, the center or rear of the water tank 200 moves downward, so that the second connecting unit 254 can be connected to the first connecting unit 310.

[0302] The nozzle cover 130 may be provided with a valve operating unit 144 for operating the valve 230 in the water tank 200. The valve operating unit 144 may be connected to the nozzle cover 130.

[0303] Water discharged from water tank 200 can flow through valve operating unit 144.

[0304] The valve operating unit 144 can be connected to the lower side of the nozzle cover 130, and a portion of the valve operating unit 144 can protrude upward through the nozzle cover 130.

[0305] When the water tank 200 is seated on the suction nozzle cover 130, the upwardly protruding valve operating unit 144 is introduced into the water tank 200 through the outlet 216 of the water tank 200. In other words, the valve operating unit 144 can be arranged facing the outlet 216 of the water tank 200.

[0306] The valve operating unit 144 will be described later with reference to the accompanying drawings.

[0307] The nozzle cover 130 may be provided with a seal 143 for preventing water discharged from the water tank 200 from leaking from the vicinity of the valve operating unit 144. The seal 143 may be formed of, for example, a rubber material and may be attached to the nozzle cover 130 from above.

[0308] The suction nozzle cover 130 may be equipped with a water pump 270, which is used to control the water discharged from the water tank 200. The water pump 270 may be connected to a pump motor 280.

[0309] A pump mounting rib 146 for mounting a water pump 270 may be provided on the lower side of the suction nozzle cover 130. The water pump 270 and the pump motor 280 are mounted in the suction nozzle cover 130, so that even if water falls into the suction nozzle base 110, the pump motor 280 will be prevented from contacting water.

[0310] Pump 270 is a pump that operates to connect the inlet and outlet by expanding or contracting the valve body therein during operation, and the pump can be implemented by a known structure, so its detailed description will be omitted.

[0311] The valve body in the water pump 270 can be driven by the pump motor 280. Therefore, according to this embodiment, while the pump motor 280 is operating, water in the water tank 200 can be continuously and stably supplied to the rotary cleaning units 40 and 41.

[0312] The operation of the pump motor 280 can be adjusted by operating the adjustment unit 180 described above. For example, the adjustment unit 180 can select the on / off state of the pump motor 280.

[0313] Alternatively, the output (or speed) of the pump motor 280 can be adjusted by the regulating unit 180.

[0314] The nozzle cover 130 may further include at least one fastening boss 148 for engagement with the nozzle base 110.

[0315] Additionally, the nozzle cover 130 may be provided with nozzles 149 for spraying water onto the rotating cleaning units 40 and 41, which will be described later. For example, a pair of nozzles 149 may be mounted on the nozzle cover 130 with them spaced apart from each other in the lateral direction.

[0316] The nozzle cover 130 may be provided with a nozzle mounting boss 149c for accommodating the nozzle 149. For example, the nozzle 149 may be fastened to the nozzle mounting boss 149c by means of screws.

[0317] Nozzle 149 may include a connection unit 149a for connecting to a branch pipe, which will be described later.

[0318] <Description of the structure and operation of the operating unit, the first connecting unit, and the support>

[0319] Figure 16 This is a perspective view showing the operating unit, the first connecting unit, and the support body separated from each other within the nozzle cover. Figure 17 It is along Figure 14 A sectional view cut by the FF line.

[0320] Figure 18 It is in the state of the first connecting unit connected to the nozzle cover along Figure 17 The cross-sectional view cut by line GG in the middle, and Figure 19 This is a cross-sectional view showing the state in which the first and second connecting units are released by pressing the operating unit.

[0321] refer to Figures 16 to 19 The operating unit 300 can be supported by the flow path cover 136. The flow path cover 136 may include an operating unit receiving portion 137 with a recessed shape for supporting and receiving the operating unit 300.

[0322] On both sides of the operation unit 300, there may be connecting hooks 302 for connecting the operation unit 300 to the flow path cover 136.

[0323] The operation unit 300 can be received in the operation unit receiving portion 137 from above.

[0324] The bottom wall of the operating unit receiving portion 137 is provided with a vertically penetrating slot 137b, and the connecting hook 302 passes through the slot 137b to hook onto the lower surface of the bottom wall of the operating unit receiving portion 137.

[0325] When the connecting hook 302 is hooked onto the bottom wall of the operating unit receiving portion 137, it can prevent the operating unit 300 from moving upward from the flow path cover 136.

[0326] The operating unit 300 can be elastically supported by a first elastic member 306. A plurality of first elastic members 306 can support the operating unit 300 so that the operating unit 300 does not move to one side when the operating unit 300 is operated.

[0327] The plurality of first elastic members 306 may be arranged to be spaced apart from each other in the lateral direction, but are not limited thereto.

[0328] The operating unit 300 may include a first connecting protrusion 304 for connecting each of the first elastic members 306. The first connecting protrusion 304 may protrude downward from the lower surface of the operating unit 300. The protruding length of the first connecting protrusion 304 may be shorter than the protruding length of the connecting hook 302.

[0329] The first elastic member 306 may be, for example, a coil spring, and the upper side of the first elastic member 306 may be received in the first connecting protrusion 304. For this purpose, the first connecting protrusion 304 may be a cylindrical rib in which a space is formed.

[0330] The bottom wall of the operating unit receiving portion 137 may include a second connecting protrusion 137a, to which a first elastic member 306 is connected.

[0331] The second connecting protrusion 137a can protrude upward from the bottom wall of the operating unit receiving portion 137. With the first elastic member 306 wrapped around the second connecting protrusion 137a, the first elastic member 306 can sit on the bottom wall of the operating unit receiving portion 137. In other words, the second connecting protrusion 137a can be received within the space formed by the first elastic member 306.

[0332] The outer diameter of the second connecting protrusion 137a can be smaller than the inner diameter of the first connecting protrusion 304. Therefore, it is possible to prevent the second connecting protrusion 137a and the first connecting protrusion 304 from colliding with each other during the descent of the operating unit 300.

[0333] The first connecting unit 310 is located on the slot 137b of the operating unit receiving portion 137, and the two side ends of the first connecting unit 310 can be connected to the bottom wall of the operating unit receiving portion 137.

[0334] The first connecting unit 310 may include a hook 312 and a connecting rail 316, with the bottom wall of the operating unit receiving portion 137 connected to both sides of the connecting rail 316.

[0335] A portion of the connecting rail 316 may be placed on the upper surface of the bottom wall of the operating unit receiving portion 137, and another portion of the connecting rail 316 may contact the lower surface of the bottom wall of the receiving portion 137.

[0336] Therefore, the first connecting unit 310 can move stably in the horizontal direction while connected to the bottom wall of the operating unit receiving portion 137 by means of the connecting rail 316.

[0337] As described above, the first connecting unit 310 can be elastically supported by the second elastic member 314, and the second elastic member 314 can elastically support the first connecting unit 310 on the opposite side of the hook 312.

[0338] The flow path cover 136 may further include a connection unit receiving portion 136a in which the second connection unit 254 is received. The connection unit receiving portion 136a may be located in front of the operation unit receiving portion 137.

[0339] The flow path cover 136 may further include a body receiving portion 138 located below the connecting unit receiving portion 136a and receiving the support 320.

[0340] Therefore, with the second connecting unit 254 received in the connecting unit receiving portion 136a, the second connecting unit 254 can be located directly above the support 320.

[0341] The support 320 may include a pair of connecting hooks 322 for connection to the body receiving portion 138. The body receiving portion 138 may be provided with a hook connecting groove 138a to which the connecting hooks 322 are connected.

[0342] With the connecting hook 322 of the support body 320 engaged with the hook connecting groove 138a, the support body 320 can move vertically. Therefore, the hook connecting groove 138a can extend in the vertical direction.

[0343] The support 320 can be elastically supported by the third elastic member 324.

[0344] When the connection between the first connecting unit 310 and the second connecting unit 254 is released, the third elastic member 324 supporting the support body 320 can provide elastic force to move the second connecting unit 254 upward.

[0345] When the first connecting unit 310 is connected to the second connecting unit 254, the second connecting unit 254 presses down on the support 320, and the third elastic member 324 contracts to accumulate elastic force.

[0346] In this state, in order to separate the water tank 200, when the operating unit 300 is pressed down, the downward moving force of the operating unit 300 is transmitted to the first connecting unit 310, thereby causing the first connecting unit 310 to move in the horizontal direction.

[0347] At this time, the first connecting unit 310 moves away from the second connecting unit 254, causing the hook 312 of the first connecting unit 310 to disengage from the slot 256 of the second connecting unit 254, thereby releasing the connection between the first connecting unit 310 and the second connecting unit 254.

[0348] 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 320, causing the support 320 to lift the second connecting unit 254 placed on the support 320.

[0349] Then, the portion of the second connecting unit 254 in the water tank 200 is lifted above the nozzle cover 130. Therefore, a gap exists between the water tank 200 and the nozzle cover 130, allowing the user to easily grip the water tank 200.

[0350] When the force used to press the operating unit 300 is removed while the second connecting unit 254 is raised to a predetermined height, the first connecting unit 310 returns to its initial position by means of the second elastic member 314.

[0351] The hook of the first connecting unit 310 protrudes into the connecting unit receiving portion 136a and is located on the upper side of the support 320. The lower end of the second connecting unit 254 is located on the hook 312 of the first connecting unit 310.

[0352] Figure 20 This is a view showing the valve operating unit and the seal separated from each other in the nozzle cover according to an embodiment of the present invention.

[0353] refer to Figure 20 The nozzle cover 130 may include a water inlet 145 formed at a position corresponding to the outlet 216 of the water tank 200.

[0354] The seal 143 is connected to the bottom wall 131a on the upper side of the bottom wall 131a of the nozzle cover 130, and the valve operating unit 144 is connected to the bottom wall 131a on the lower side of the bottom wall 131a.

[0355] The seal 143 may include a hole 143a formed at a position corresponding to the water inlet 145. Water can pass through the water inlet 145 after passing through the hole 143a.

[0356] The seal 143 may further include a connecting protrusion 143b formed around the hole 143a and coupled to the bottom wall 131a of the nozzle cap 130. The bottom wall 131a of the nozzle cap 130 may have a protruding hole 145a for engaging with the connecting protrusion 143b.

[0357] A guide protrusion 144b may be provided around the valve operating unit 144 to guide the connection position of the valve operating 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 suction nozzle cover 130, thereby positioning the guide protrusion 144b.

[0358] An absorber 147 capable of absorbing water discharged from the water tank 200 can be connected to a valve operating unit 144. When water is discharged from the water tank 200, the absorber 147 initially absorbs water, and as the amount of water discharged from the water tank 200 increases, the water absorbed by the absorber 147 can be supplied to mops 402 and 404 through the water supply path described later.

[0359] The absorbent member 147 may be formed in, for example, a cylindrical shape and may include a pressing hole 147a through which the pressing part 144a, which will be described later, passes.

[0360] With the absorption member 147 connected to the valve operating unit 144, the valve operating unit 144 can be connected to the suction nozzle cover 130.

[0361] The valve operating unit 144 can be connected to the nozzle cover 130 by a fusion bonding method, or by means of an adhesive, but is not limited thereto.

[0362] The absorption component 147 can also filter out foreign matter contained in the water discharged from the water tank 200.

[0363] <Suction nozzle base>

[0364] Figure 21 This is a view showing the state in which the flow path forming portion is connected to the nozzle base according to an embodiment of the present invention, and Figure 22 This is a view showing a suction nozzle base according to an embodiment of the present invention, as viewed from below.

[0365] refer to Figure 6 , Figure 21 and Figure 22 The nozzle base 110 may include a pair of shaft through holes 116 and 118 through which the drive shaft (which will be described later) connected to each of the rotating plates 420 and 440 in each of the drive units 170 and 171 passes.

[0366] The nozzle base 110 is provided with a sleeve for seating in each of the drive units 170 and 171 (see Figure 24 The 174) of the sitting groove 116a, and the shaft through holes 116 and 118 can be formed in the sitting groove 116a.

[0367] For example, the seating groove 116a can be formed in a circular shape and can be recessed downward from the nozzle base 110. Through holes 116 and 118 can be formed in the bottom of the seating groove 116a.

[0368] Sleeves provided in drive units 170 and 171 (see Figure 24When 174 is seated in the seating slot 116a, the horizontal movement of the drive devices 170 and 171 is restricted during the movement of the suction nozzle 1 or during the operation of the drive devices 170 and 171.

[0369] A downwardly protruding sleeve 111b is provided on the lower surface of the nozzle base 110 at a position corresponding to the sitting groove 116a. The protruding sleeve 111b is formed by the lower surface of the nozzle base 110 protruding downward as the sitting groove 116a is recessed downward.

[0370] With the flow path forming portion 150 connected to the nozzle base 110, each of the shaft through holes 116 and 118 can be arranged on both sides of the flow path forming portion 150.

[0371] The nozzle base 110 may be provided with a mounting portion 120 for mounting a control board 115 (or a first board), which controls each of the drive devices 170 and 171. For example, the board mounting portion 120 may be formed in the shape of a hook extending upward from the nozzle base 110.

[0372] The hook of the plate mounting portion 120 is attached to the upper surface of the control plate 115 to restrict the upward movement of the control plate 115.

[0373] The control panel 115 can be mounted horizontally. The control panel 115 can be mounted spaced apart from the bottom of the nozzle base 110.

[0374] Therefore, even if water falls to the bottom of the nozzle base 110, it can prevent water from contacting the control panel 115.

[0375] The nozzle base 110 may be provided with a support protrusion 120a for supporting the control plate 115 away from the bottom.

[0376] The plate mounting portion 120 may be located on one side of the flow path forming portion 150 in the nozzle base 110, but is not limited thereto. For example, the control plate 115 may be located adjacent to the adjustment unit 180.

[0377] Therefore, the switch mounted on the control panel 115 (which will be described later) can sense the operation of the adjustment unit 180.

[0378] In this embodiment, the control plate 115 can be located on the opposite side of the valve operating unit 144 relative to the second flow path 114. Therefore, even if a leak occurs in the valve operating unit 144, water can be prevented from flowing to the control plate 115 side.

[0379] The nozzle base 110 may further include: a support rib 122 for supporting the lower side of each of the drive units 170 and 171; and fastening bosses 117 and 117a for fastening each of the drive units 170 and 171.

[0380] Support ribs 122 protrude from the nozzle base 110 and bend at least once to separate each of the drive units 170 and 171 from the bottom of the nozzle base 110. Alternatively, a plurality of spaced-apart support ribs 122 may protrude from the nozzle base 110 to separate each of the drive units 170 and 171 from the bottom of the nozzle base 110.

[0381] Even if water falls to the bottom of the nozzle base 110, the drive units 170 and 171 are separated from the bottom of the nozzle base 110 by the support ribs 122, which minimizes the water flow to the drive units 170 and 171.

[0382] Additionally, because of the sleeves of drive units 170 and 171 (see...) Figure 24 The 174) is seated in the seat groove 116a, so even if water falls to the bottom of the nozzle base 110, it can pass through the sleeve (see Figure 24 174) Prevent water from being sucked into drive devices 170 and 171.

[0383] Additionally, the nozzle base 110 may further include a nozzle orifice 119 through which each nozzle 149 passes.

[0384] When the nozzle cover 130 is connected to the nozzle base 110, a portion of the nozzle 149 connected to the nozzle cover 130 can pass through the nozzle hole 119.

[0385] Additionally, the nozzle base 110 may further include: a clearance hole 121a for preventing interference with the structure of each of the drive units 170 and 171; and a fastening boss 121 for fastening the flow path forming portion 150.

[0386] At this time, the 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 drive unit 170 and 171.

[0387] A portion of each of the drive units 170 and 171 may be positioned in the clearance hole 121a such that the support rib 122 may be positioned around the clearance hole 121a to minimize the flow of water into the clearance hole 121a.

[0388] For example, the support rib 122 can be located in the clearance hole 121a in the forming area.

[0389] The lower surface of the nozzle base 110 may be provided with an upwardly recessed plate receiving portion 111, so that when the rotating cleaning units 40 and 41 are connected to the lower side of the nozzle base 110, the first flow path 112 is as close as possible to the floor where the nozzle 1 is placed.

[0390] With the rotating cleaning units 40 and 41 connected by means of the plate receiving portion 111, the increase in the height of the nozzle 1 can be minimized.

[0391] With the rotary cleaning units 40 and 41 located in the plate receiving portion 111, the rotary cleaning units 40 and 41 can be connected to the drive devices 170 and 171.

[0392] The nozzle base 110 may be provided with a bottom rib 111a, which is arranged around the axial through holes 116 and 118. For example, the bottom rib 111a may protrude downward from the lower surface of the plate receiving portion 111 and may be formed in an annular shape.

[0393] Shaft through holes 116 and 118, nozzle hole 119 and clearance hole 121a can be located in the area formed by bottom rib 111a.

[0394] Installation locations for multiple switches

[0395] Figure 23 This is a diagram illustrating a plurality of switches disposed on a control panel according to an embodiment of the present invention.

[0396] refer to Figure 4 and Figure 23 As described above, the nozzle base 110 is provided with a control board 115 as described above. Multiple switches 128a and 128b may be provided on the upper surface of the control board 115 to sense the operation of the adjustment unit 180.

[0397] Multiple switches 128a and 128b can be installed in a laterally spaced configuration.

[0398] The plurality of switches 128a and 128b may include a first switch 128a for sensing a first position of the adjustment unit 180 and a second switch 128b for sensing a second position of the adjustment unit 180.

[0399] For example, when the regulating unit 180 pivots to the left and moves to the first position, the regulating unit 180 presses the contact of the first switch 128a to turn on the first switch 128a. In this case, the pump motor 280 operates as the first output, and the water in the water tank 200 can be discharged at a first amount per unit time.

[0400] When the adjustment unit 180 pivots to the right and moves to the second position, the adjustment unit 180 presses the contact of the second switch 128b, causing the second switch 128b to be turned on.

[0401] In this case, the pump motor 280 operates as a second output, which is greater than the first output, so that water in the water tank 200 can be discharged in a second amount per unit time.

[0402] The pump motor 280 can be controlled by a controller mounted on the control panel 115. This controller can control the duty cycle of the pump motor 280.

[0403] For example, the controller can control the pump motor 280 to be turned on for N seconds and then off for M seconds. The pump motor 280 can be repeatedly turned on and off to discharge water from the water tank 200.

[0404] At this time, the off time can be changed while maintaining the on time of the pump motor 280 through the operation of the controller, thereby changing the amount of water discharged from the water tank 200.

[0405] For example, to increase the drainage volume in water tank 200, the controller can operate the pump motor 280 to start for N seconds and then turn it off for P seconds, where P is less than M. In either case, the off time of the pump motor 280 can be controlled to be longer than its on time.

[0406] When the regulating unit 180 is in the neutral position between the first position and the second position, the regulating unit 180 does not press the contacts of the first switch 128a and the second switch 128b, and the pump motor 280 stops.

[0407] <Drive device>

[0408] Figure 24 This is a view showing the first and second drive units according to an embodiment of the present invention, as viewed from below. Figure 25 This is a view showing the first and second drive devices according to an embodiment of the present invention, as viewed from above. Figure 26 This is a view showing the structure used to prevent the motor housing and drive motor from rotating, and Figure 27 This is a view showing the state in which the transmission unit is connected to the drive motor according to one embodiment of the present invention.

[0409] refer to Figures 23 to 27 The first drive unit 170 and the second drive unit 171 can be symmetrically formed and arranged in the lateral direction.

[0410] The first drive device 170 may include a first drive motor 182, and the second drive device 171 may include a second drive motor 184.

[0411] A motor PCB 350 (or a second board) for driving each drive motor can be connected to drive motors 182 and 184. The motor PCB 350 can be connected to control board 115 to receive control signals. The motor PCB 350 can be connected to drive motors 182 and 184 in an upright position and can be spaced apart from the nozzle base 110.

[0412] The controller is able to sense the current of each drive motor 182 and 184. Because the friction between the mop 402 and the floor acts as a load on the drive motors 182 and 184 when the nozzle 1 is placed on the floor, the current of the drive motors 182 and 184 can be equal to or greater than the first reference value.

[0413] Meanwhile, because there is no friction between the mop 402 and the floor when the nozzle 1 is lifted off the floor, the current of each drive motor 182 and 184 can be less than the first reference value.

[0414] Therefore, when the sensed current of each drive motor 182 and 184 is less than a first reference value and the time during which the 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 drive motor 182 and 184 is less than the first reference value, the controller can stop the operation of the pump motor 280.

[0415] Additionally, when the sensed current of each drive motor 182 and 184 is less than a first reference value and the time during which the current is less than the first reference value is equal to or greater than a reference time, the controller may stop the operation of each drive motor 182 and 184. Alternatively, if the sensed current of each drive motor 182 and 184 is less than the first reference value, the controller may stop the operation of each drive motor 182 and 184.

[0416] When the current sensed by the drive motors 184 and 184 is equal to or greater than the first reference value, the controller can operate the pump motor 280 and each drive motor 182 and 184 simultaneously or sequentially.

[0417] In this embodiment, the terminal for supplying power to the nozzle 1 can be located in the connecting tube 50.

[0418] As described above, the nozzle 1 may include rotary cleaning units 40 and 41, drive units 170 and 171, and a pump motor 280 for driving the rotary cleaning units 40 and 41. Therefore, the drive units 170 and 171 and the pump motor 280 operate to rotate the rotary cleaning units 40 and 41 to clean the floor only when power is supplied to the connecting pipe 50, and water can be supplied to the rotary cleaning units 40 and 41 from the water tank 200.

[0419] Therefore, when the nozzle 1 of this embodiment is connected to an existing cleaner used by a user, the nozzle 1 can be used to clean the floor, and thus the nozzle 1 can be used with the additional accessories of the existing cleaner.

[0420] The motor PCB 350 may include multiple resistors 352 and 354 to improve the electromagnetic interference (EMI) performance of the drive motor.

[0421] For example, a pair of resistors 352 and 354 can be provided in the motor PCB 350.

[0422] One of a pair of resistors, 352 and 354, can be connected to the (+) terminal of the drive motor, and the other resistor can be connected to the (-) terminal of the drive motor. Such a pair of resistors, 352 and 354, can reduce the output fluctuation of the drive motor.

[0423] A pair of resistors 352 and 354 can be, for example, laterally spaced from the motor PCB 350.

[0424] Each of the drive units 170 and 171 may further include a motor housing. Drive motors 182 and 184, as well as a transmission unit for transmitting power, may be housed within the motor housing.

[0425] The motor housing may include, for example, a first housing 172 and a second housing 173 connected to the upper side of the first housing 172.

[0426] With each drive motor 182 and 184 mounted in a motor housing, the axis of each drive motor 182 and 184 can extend approximately horizontally.

[0427] If the drive units are mounted in the motor housing such that the axes of each drive motor 182 and 184 extend in a horizontal direction, then the drive units 170 and 171 can be compact. In other words, the height of the drive units 170 and 171 can be reduced.

[0428] The first housing 172 may have a shaft hole 175 through which a drive shaft 190 for connection with the rotating plates 420 and 440 of the transmission unit passes. For example, a portion of the drive shaft 190 may protrude downward through the lower side of the motor housing.

[0429] The horizontal cross-section of the drive shaft 190 can be formed into a non-circular shape, thereby preventing relative rotation of the drive shaft 190 when it is connected to the rotating plates 420 and 440.

[0430] A sleeve 174 may be provided around the shaft hole 175 in the first housing 172. The sleeve 174 may protrude from the lower surface of the first housing 172.

[0431] The sleeve 174 can be formed in an annular shape, for example. Therefore, the sleeve 174 can be seated in a circular seat groove 116a.

[0432] In this state, drive motors 182 and 184 can be mounted on the first housing 172 and fixed to the first housing 172 by means of motor fixing unit 183.

[0433] Drive motors 182 and 184 can be formed in an approximately cylindrical shape, and drive motors 182 and 184 can be seated in the first housing 172 with their axes approximately horizontal (in the state where drive motors 182 and 184 are laid flat).

[0434] The motor mounting unit 183 may have a generally semi-circular cross-section and may cover the upper part of the drive motors 182 and 184 mounted on the first housing 172. The motor mounting unit 183 may be fixed to the first housing 172 by means of fastening members such as screws.

[0435] The second housing 173 may include a motor cover 173a that covers a portion of the drive motors 182 and 184.

[0436] For example, the motor cover 173a may be rounded to surround the motor mounting unit 183 from the outside of the motor mounting unit 183.

[0437] For example, the motor cover 173a can be formed in an inverted round shape, such that a portion of the second housing 173 protrudes upward.

[0438] Anti-rotation ribs 173c and 173d are formed on the 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 the operation of the drive motors 182 and 184, and a rib receiving slot 183a is formed in the motor fixing unit 183 to receive the anti-rotation ribs 173c and 173d.

[0439] Although there are no restrictions, the widths of the anti-rotation ribs 173c and 173d can be the same as the width of the rib receiving slot 183a.

[0440] Alternatively, a plurality of anti-rotation ribs 173c and 173d may be spaced apart from the motor cover 173a in the circumferential direction of the drive motors 182 and 184, and the plurality of anti-rotation ribs 173c and 173d may be received in the rib receiving slot 183a.

[0441] At this time, the maximum width of the multiple anti-rotation ribs 173c and 173d in the circumferential direction of the drive motors 182 and 184 can be equal to or slightly less than the width of the rib receiving slot 183a.

[0442] The transmission unit may include: a drive gear 185 connected to the shaft of each drive motor 182 and 184; and a plurality of transmission gears 186, 187, 188 and 189 for transmitting the rotational force of the drive gear 185.

[0443] The shafts of drive motors 182 and 184 (see) Figure 30 A3 and A4 in the diagram extend approximately horizontally, while the centerlines of the rotating plates 420 and 440 extend vertically. Therefore, the drive gear 185 can be, for example, a spiral bevel gear.

[0444] The plurality of transmission gears 186, 187, 188, and 189 may include a first transmission gear 186 that engages with a drive gear 185. The first transmission gear 186 may have a center of rotation extending in a vertical direction.

[0445] The first transmission gear 186 may include a spiral bevel gear, such that the first transmission gear 186 can engage with the drive gear 185.

[0446] The first transmission gear 186 may further include a helical gear arranged below the spiral bevel gear as a second gear.

[0447] The plurality of transmission gears 186, 187, 188 and 189 may further include a second transmission gear 187 that engages with the first transmission gear 186.

[0448] The second transmission gear 187 can be a two-stage helical gear. In other words, the second transmission gear 187 includes two vertically arranged helical gears, and the upper helical gear can be connected to the helical gear of the first transmission gear 186.

[0449] The plurality of transmission gears 186, 187, 188 and 189 may further include a third transmission gear 188 that engages with the second transmission gear 187.

[0450] The third transmission gear 188 can also be a two-stage helical gear. In other words, the third transmission gear 188 includes two vertically arranged helical gears, and the upper helical gear can be connected to the lower helical gear of the second transmission gear 187.

[0451] The plurality of transmission gears 186, 187, 188 and 189 may further include a fourth transmission gear 189 that engages with the lower helical gear of the third transmission gear 188. The fourth transmission gear 189 may be a helical gear.

[0452] The drive shaft 190 can be connected to the fourth drive gear 189. In other words, the fourth drive gear 189 is the output end of the transmission part. The drive shaft 190 can be connected to pass through the fourth drive gear 189. The drive shaft 190 can rotate together with the fourth drive gear 189.

[0453] Therefore, the upper bearing 191 is connected to the upper end of the drive shaft 190 that passes through the fourth drive gear 189, and the lower bearing 191a is connected to the drive shaft 190 on the lower side of the fourth drive gear 189.

[0454] Figure 28 This is a view showing the state in which the transmission unit is connected to the drive motor according to another embodiment of the present invention.

[0455] The rest of this embodiment is the same as the previous embodiment, but the construction of the transmission part is different. Therefore, only the characteristic parts of this embodiment will be described below.

[0456] refer to Figure 28 The transmission unit in this embodiment may include a drive gear 610 connected to the shafts of drive motors 182 and 184.

[0457] The drive gear 610 can be a worm gear. The axis of rotation of the drive gear 610 can extend in the horizontal direction. Because the drive gear 610 rotates together with its axis of rotation, the bearing 640 can be connected to the drive gear 610 for smooth rotation.

[0458] The first housing 600 may include: a motor support portion 602 for supporting drive motors 182 and 184; and a bearing support portion 604 for supporting bearing 640.

[0459] The transmission unit may further include a plurality of transmission gears 620, 624 and 628 for transmitting the rotational force of the drive gear 610 to the rotating plates 420 and 440.

[0460] The plurality of transmission gears 620, 624 and 628 may include a first transmission gear 620 that engages with the drive gear 610. The first transmission gear 620 may include an upper worm gear that engages with the drive gear 610.

[0461] Because the drive gear 610 and the first transmission gear 620 are engaged in the form of a worm gear, they have the advantage of reducing noise through friction during the transmission of the rotational force of the drive gear 610 to the first transmission gear 620.

[0462] The first transmission gear 620 may include a helical gear arranged on the lower side of the upper worm gear as a second gear.

[0463] The first transmission gear 620 can be rotatably connected to a first shaft 622 extending in the vertical direction. The first shaft 622 can be fixed to the first housing 600.

[0464] Therefore, the first transmission gear 620 can rotate relative to the fixed first shaft 622. According to this embodiment, since the first transmission gear 620 is configured to rotate relative to the first shaft 622, it has the advantage of not requiring bearings.

[0465] The plurality of transmission gears 620, 624 and 628 may further include a second transmission gear 624 that engages with the first transmission gear 620. The second transmission gear 624 is, for example, a helical gear.

[0466] The second transmission gear 624 can be rotatably connected to a second shaft 626 extending in the vertical direction. The second shaft 626 can be fixed to the first housing 600.

[0467] Therefore, the second transmission gear 624 can rotate relative to the fixed second shaft 626. According to this embodiment, because the second transmission gear 624 is configured to rotate relative to the second shaft 626, it has the advantage of not requiring bearings.

[0468] The plurality of transmission gears 620, 624 and 628 may further include a third transmission gear 628 that engages with the second transmission gear 624. The third transmission gear 628 is, for example, a helical gear.

[0469] The third transmission gear 628 can be connected to the transmission shaft 630, which is connected to the rotating 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.

[0470] The bearing 632 can be connected to the drive shaft 630 to enable the drive shaft 630 to rotate smoothly.

[0471] <Arrangement of the drive unit in the nozzle base>

[0472] Figure 29 This is a diagram illustrating the relationship between the rotation direction of the rotating plate and the extension direction of the axis of the drive motor according to one embodiment of the present invention. Figure 30 This is a plan view showing the state in which the drive device according to an embodiment of the present invention is mounted on the nozzle base, and Figure 31 This is a front view showing the state in which the drive device according to one embodiment of the present invention is mounted on the nozzle base.

[0473] In particular, Figure 30 The image shows the state where the second housing of the motor housing has been removed.

[0474] refer to Figures 29 to 31The first rotating plate 420 and the second rotating plate 440, which are arranged in the suction nozzle 1 in the transverse direction, can rotate in opposite directions.

[0475] For example, the 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 towards one side of the first flow path 112.

[0476] The axes A3 and A4 of the drive motors 182 and 184 can be arranged to be substantially parallel to the tangents of the rotating plates 420 and 440.

[0477] In this embodiment, the term "substantially parallel" means that even if the two lines are not parallel, the angle formed between them is within 5 degrees.

[0478] When considering the vibrations caused by the driving forces generated in each drive motor 182 and 184, as well as the vibrations caused by friction with the floor due to the rotation of the rotating cleaning units 40 and 41, the drive motors 182 and 184 can be arranged symmetrically with respect to the centerline A2 of the second flow path 114.

[0479] Each of the drive motors 182 and 184 is arranged to vertically overlap with the rotating plates 420 and 440.

[0480] At least a portion of each of the drive motors 182 and 184 may be located in the 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 drive motors 184 and 184 may be arranged to overlap with the rotating plates 420 and 440 in the vertical direction.

[0481] Preferably, each drive motor 182 and 184 can be positioned as close as possible to the centerline A2 of the second flow path 114 from the nozzle 1, thereby maximizing the vibration balance throughout the nozzle 1.

[0482] For example, such as Figure 30 As shown, the axes A3 and A4 of the drive motors 182 and 184 can be arranged to extend in the front-rear direction. In this case, the axes A3 and A4 of the drive motors 182 and 184 can be substantially parallel to the center line A2 of the second flow path 114.

[0483] The drive motors 182 and 184 may include a front end portion 182a and a rear end portion 182b spaced apart from each other in the extending directions of axes A3 and A4.

[0484] The front-end part 182a can be positioned closer to the first flow path 112 than the back-end part 182b.

[0485] The rotation center of the fourth transmission gear 189 (which is essentially the rotation center of the rotating cleaning unit) can be located in the area corresponding to the area between the front end portion 182a and the rear end portion 182b.

[0486] At least a portion of the fourth transmission gear 189 may be arranged to overlap with the drive motors 182 and 184 in the vertical direction.

[0487] Drive motors 182 and 184 include a connecting surface for connecting the front end portion 182a and the rear end portion 182b, and the outermost line 182c of the connecting surface may overlap with the fourth transmission gear 189 in the vertical direction.

[0488] The axes A3 and A4 of each drive motor 182 and 184 can be positioned above the rotational trajectory of the transmission gear.

[0489] With this arrangement of drive units 170 and 171, the weight of each drive unit 170 and 171 can be evenly distributed on the left and right sides of the nozzle 1.

[0490] In addition, since 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 suction nozzle 1 from increasing due to each drive motor 182 and 184.

[0491] 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 preventing the drive motors 182 and 184 from increasing the height of the nozzle 1.

[0492] Additionally, with the drive gears 185 and 185 connected to the shafts of each drive motor 182 and 184 such that the increase in the height of the nozzle 1 is minimized due to each drive unit 170 and 171, the drive gears 185 and 185 can be located between the drive motors 182 and 184 and the first flow path 112.

[0493] In this case, since the drive motors 182 and 184, which have the longest vertical lengths of drive units 170 and 171, are positioned as close to the rear side as possible in the nozzle body 10, the increase in height on the front end of the nozzle 1 can be minimized.

[0494] Because the drive units 170 and 171 are positioned close to the rear of the nozzle 1, and the water tank 200 is located above the drive units 170 and 171, the center of gravity of the nozzle 1 can be pulled towards the rear of the nozzle 1 due to the water in the water tank 200 and the weight of the drive units 170 and 171.

[0495] Therefore, in this embodiment, a connecting chamber for the water tank 200 is positioned between the first flow path 112 and the drive devices 170, 170 in the front-rear direction relative to the nozzle 1 (see...). Figure 6 (226).

[0496] In this embodiment, the rotation centers C1 and C2 of the rotating plates 420 and 440 coincide with the rotation center of the drive shaft 190.

[0497] The axes A3 and A4 of the drive motors 182 and 184 can be located in the area between the rotation centers C1 and C2 of the rotating plates 420 and 440.

[0498] Additionally, drive motors 182 and 184 can be located in the area between the rotation centers C1 and C2 of the rotating plates 420 and 440.

[0499] In addition, each of the drive motors 182 and 184 can be arranged to overlap with an imaginary line connecting the first rotation center C1 and the second rotation center C2 in the vertical direction.

[0500] <The arrangement relationship between the drive unit cover of the suction nozzle cap and the rotation center of the rotating plate and the motor>

[0501] Figure 32 This is a view showing the structure of the drive unit cover of the suction cap according to an embodiment of the present invention, and the arrangement relationship between the rotation center of the rotating plate and the drive motor.

[0502] refer to Figure 14 and Figure 32 The nozzle cover 130 has a pair of drive unit covers 132 and 134 arranged in a symmetrical and upwardly convex shape in the transverse direction.

[0503] Each drive unit cover 132 and 134 may include: a first protruding surface 135a extending upward from the bottom wall 130a of the nozzle cover 130; and a second protruding surface 135b positioned higher than the first protruding surface 135a and having a different curvature than the first protruding surface 135.

[0504] The first protruding surface 135a and the second protruding surface 135b can be directly connected, or they can be connected by means of the third protruding surface 135c.

[0505] At this point, the third protruding surface 135c is formed to have a curvature different from each of the first protruding surface 135a and the second protruding surface 135b. The third protruding surface 135c is located at a position that is higher than the first protruding surface 135a and lower than the second protruding surface 135b.

[0506] In this embodiment, the second protruding surface 135b may overlap with the second bottom wall 213b of the water tank 200 in the vertical direction. Furthermore, the second protruding surface 135b may be formed in a shape corresponding to the second bottom wall 213b of the water tank 200.

[0507] The second protruding surface 135b may be the surface located at the highest position in the drive unit covers 132 and 134.

[0508] For example, the second protruding surface 135b can be formed to have a left-right length (width) that is longer than its front-back length (width). In this embodiment, the length direction of the second protruding surface 135b is longer in the lateral direction.

[0509] The length direction of the second protruding surface 135b intersects the extension direction of the axes A3 and A4 of the drive motors 182 and 184.

[0510] 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.

[0511] The center C4 of the second protruding surface 135b is eccentric about the center C3 of the drive unit cover 132.

[0512] For example, the center C4 of the second protruding surface 135b is off-center at the center C3 of the drive unit cover 132 in a direction away from the center line A2 of the second flow path 114.

[0513] 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.

[0514] In addition, the rotation centers C1 and C2 of the rotating plates 420 and 440 can be positioned to overlap with the second protruding surface 135b in the vertical direction.

[0515] The rotation centers C1 and C2 of the rotating plates 420 and 440 are eccentric about the center C3 of the drive unit covers 132 and 134.

[0516] 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.

[0517] 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.

[0518] 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.

[0519] 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.

[0520] 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.

[0521] 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.

[0522] 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.

[0523] <Rotating Plate>

[0524] 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.

[0525] refer to Figure 34 and Figure 34 Each of the rotating plates 420 and 440 can be formed into a disk shape to prevent interference between them during rotation.

[0526] 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.

[0527] 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.

[0528] A shaft connection unit 421 for connecting the drive shaft 190 may be provided at the central part of each rotating plate 420 and 440.

[0529] For example, the shaft connection unit 421 may be disposed in the central portion of the inner body 420b. The shaft connection unit 421 may protrude upward from the upper surface of the inner body 420b, and the upper surface of the shaft connection unit 421 may be positioned higher than the upper surface 420c of the outer body 420a.

[0530] For example, the drive shaft 190 can be inserted into the shaft connection unit 421. For this purpose, the shaft connection unit 421 can be formed with a shaft receiving groove 422 for inserting the drive shaft 190.

[0531] The fastening member can be pulled into the shaft connection unit 421 from below the rotating plates 420 and 440, and the fastening member is fastened to the shaft connection unit 421 while the drive shaft 190 is connected to the shaft connection unit 421.

[0532] Rotating plates 420 and 440 may include a plurality of water passage holes 424 arranged in the radial direction outside the shaft connection unit 421.

[0533] In this embodiment, since the rotating plates 420 and 440 rotate with the mops 402 and 404 attached to the underside of the rotating plates 420 and 440, water is smoothly supplied to the mops 402 and 404 via the rotating plates 420 and 440, so that the plurality of water holes 424 can be circumferentially spaced around the shaft connecting unit 421.

[0534] Multiple water passages 424 can be defined by multiple connecting ribs 425. In this case, each connecting rib 425 can be positioned below the upper surface 420c of the rotating plates 420 and 440. In other words, each connecting rib 425 can be positioned below the upper surface 420c of the outer body 420a.

[0535] The two sides of the connecting rib 425 may include downwardly sloping surfaces, allowing water to flow smoothly into the adjacent water passage 424 when it falls into the connecting rib 425. The sloping surfaces may be flat or rounded.

[0536] Therefore, the width of the connecting rib 425 increases from the top to the bottom relative to the vertical cross section of the connecting rib 425.

[0537] The portion of the connecting rib 425 that connects to the inner peripheral surface of the outer body 420a and the portion of the connecting rib 425 that connects to the outer peripheral surface of the inner body 420b are rounded in the horizontal direction and have a maximum width of the entire length (the length of the rotating plate in the radial direction).

[0538] The inner body 420b is provided with a groove portion 421a, which provides space for positioning the protruding sleeve 111b of the nozzle 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.

[0539] The protruding sleeve 111b surrounds the shaft connection unit 421. Therefore, by means of the protruding sleeve 111b, it is possible to prevent water dripping onto the rotating plates 420 and 440 from flowing toward the shaft connection unit 421.

[0540] Because the rotating plates 420 and 440 rotate, centrifugal force acts on them. It is necessary to prevent water sprayed onto the rotating plates 420 and 440 from flowing radially outwards when the water cannot pass through the water passages 424 in the rotating plates 420 and 440 due to centrifugal force.

[0541] Therefore, water-blocking ribs 426 can be formed on the upper surfaces of the rotating plates 420 and 440 on the radially outer side of the water passage 424.

[0542] 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.

[0543] Multiple water passages 424 may be located in the internal region of the water-blocking rib 426. For example, the water-blocking rib 426 may be formed in the form of a ring.

[0544] The center of the water-blocking rib 426 can coincide with the center of the bottom rib 111a formed in the nozzle base 110.

[0545] The diameter of the bottom rib 111a of the nozzle base 110 can be larger than the diameter of the water-blocking rib 426 (see...). Figure 39 Therefore, because the two ribs are arranged outwards in the radial direction, the water-blocking effect is improved.

[0546] Mounting grooves 428 may be formed on the lower surface 420d of the rotating plates 420 and 440 to provide attachment devices for attaching mops 402 and 404 (see [link]). Figure 38 (428a). For example, mounting groove 428 may be formed on the lower surface of outer body 420a.

[0547] Attachment device (see) Figure 38 428a) could be, for example, Velcro.

[0548] Multiple mounting slots 428 can be spaced circumferentially relative to the rotation centers C1 and C2 of the rotating plates 420 and 440. Therefore, multiple attachment devices can be provided on the lower surface 420d of the rotating plates 420 and 440 (see...). Figure 38 (428a).

[0549] In this embodiment, the mounting groove 428 can be arranged radially outside the water passage hole 424 relative to the rotation centers C1 and C2 of the rotating plates 420 and 440.

[0550] For example, water passage holes 424 and mounting grooves 428 can be arranged radially outward from the rotation centers C1 and C2 of rotating plates 420 and 440.

[0551] The multiple mounting slots 428 can be formed, for example, in an arc shape, and the length of the arc of the multiple mounting slots 428 can be greater than the distance between two adjacent mounting slots.

[0552] The through holes in a plurality of water passages can be located in the area between two adjacent mounting slots.

[0553] The lower surface 420d of the rotating plates 420 and 440 may be provided with a contact rib 430, which contacts the mop 402 or 404 when the mop 402 or 404 is attached to the attachment device.

[0554] The contact rib 430 may protrude downward from the lower surface 420d of the rotating plates 420 and 440. For example, the contact rib 430 may protrude downward from the lower surface of the outer body 420a.

[0555] The contact rib 430 is arranged radially outside the water passage 424 and can be continuously formed in the circumferential direction. For example, the contact rib 430 can be formed in an annular shape.

[0556] Because mops 402 and 404 themselves (e.g., as fibrous materials) can deform, gaps may exist between mops 402 and 404 and the lower surface 420d of rotating plates 420 and 440 when mops 402 and 404 are attached to rotating plates 420 and 440 by means of attachment devices.

[0557] When the gap between the mops 402 and 404 and the lower surface 420d of the rotating plates 420 and 440 is large, the concern is that water passing through the water hole 424 will not be absorbed onto the mops 402 and 404, but will instead 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.

[0558] However, according to this embodiment, when mops 402 and 404 are connected to rotating plates 420 and 440, contact ribs 430 can contact mops 402 and 404, and suction nozzle 1 is placed on the floor. Contact ribs 430 press mops 402 and 404 with the load of suction nozzle 1.

[0559] Therefore, the contact rib 430 prevents the formation of a gap between the lower surface 420d of the rotating plates 420 and 440 and the upper surface of the mops 402 and 404, thereby enabling water to be smoothly supplied to the mops 402 and 404 through the water passage 424.

[0560] <Water Supply Flow Path>

[0561] Figure 35 This is a view illustrating the water supply path from the water tank to the rotating cleaning unit according to an embodiment of the present invention. Figure 36 This is a view showing a valve in a water tank according to an embodiment of the present invention, and Figure 37 This is a view showing the valve opening the outlet with the water tank installed on the nozzle housing.

[0562] Figure 38 This is a view showing the arrangement of the rotating plate and the nozzle according to one embodiment of the present invention, and Figure 39 This is a view showing the arrangement of the water outlet of the nozzle in the mouthpiece body according to an embodiment of the present invention.

[0563] Figure 40 This is a conceptual diagram illustrating a process of supplying water from a water tank to a rotating cleaning unit according to an embodiment of the present invention.

[0564] refer to Figures 35 to 40 The water supply path of this embodiment includes: a first supply pipe 282 connected to the 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.

[0565] The water pump 270 may include a first connection port 272 and a second connection port 274, with a first supply pipe 282 connected to the first connection port 272 and a second supply pipe 284 connected to the second connection port 274. Based on the water pump 270, the first connection port 272 is the inlet, and the second connection port 274 is the outlet.

[0566] Additionally, the water supply path may further include a connector 285 to which a second supply pipe 284 is connected.

[0567] The connector 285 can be configured such that the first connecting unit 285a, the second connecting unit 285b, and the third connecting unit 285c are arranged in a T-shape. The second supply tube 284 can be connected to the first connecting unit 285a.

[0568] The water supply path may 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 285c.

[0569] Therefore, the water flowing through the first branch pipe 286 can be supplied to the first rotating cleaning unit 40, and can also flow through the second branch pipe 287 to the second rotating cleaning unit 41.

[0570] The connector 285 can be positioned at the central portion of the nozzle body 10, such that each branch tube 286 and 287 has the same length.

[0571] For example, connector 285 can be located below flow path cover 136 and above flow path forming portion 150. In other words, connector 285 can be located directly above second flow path 114. Therefore, substantially the same amount of water can be distributed from connector 285 to each branch pipe 286 and 287.

[0572] In this embodiment, the water pump 270 may be located at a point on the water supply path.

[0573] 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 water can be discharged from the water tank 200 using a minimum number of water pumps 270.

[0574] In this embodiment, the water pump 270 can be installed in the nozzle cover 130 with the water pump 270 positioned close to the valve operation unit 144.

[0575] For example, the valve operating unit 144 and the water pump 270 can be arranged on one side of the nozzle body 10 relative to the center line A2 of the second flow path 114.

[0576] Therefore, the length of the first supply pipe 282 can be reduced, and thus the length of the water supply path can be reduced.

[0577] Each of the branch pipes 286 and 287 can be connected to the nozzle 149. The nozzle 149 can also form the water supply path of the present invention.

[0578] Nozzle 149 may include connection unit 149a, which is connected to each branch pipe 286 and 287 as described above.

[0579] The nozzle 149 may further include a water outlet 149b. The water outlet 149b extends downward through the nozzle orifice 119. In other words, the water outlet 149b may be disposed outside the nozzle housing 100.

[0580] When the water outlet 149b is located outside the nozzle housing 100, it can prevent water sprayed through the water outlet 149b from being sucked into the nozzle housing 100.

[0581] At this time, in order to prevent damage to the water outlet 149b exposed to the outside of the nozzle housing 100, an upwardly recessed groove 119a is formed in the bottom of the nozzle base 110, and the water outlet 149b can be positioned in the groove 119a while passing through the nozzle hole 119. In other words, the nozzle hole 119 can be formed in the groove 119a.

[0582] The water outlet 149b can be arranged facing the rotating plates 420 and 440 in the tank 119a. The lower surface of the water outlet 149b can be at the same height as the lower surface of the suction nozzle base 110, or it can be at a higher position. The lower surface of the water outlet 149b can be positioned higher than the upper surface 420c of the outer body 420a.

[0583] Water sprayed from the water outlet 149b can pass through the water passage 424 of the rotating plates 420 and 440.

[0584] 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.

[0585] The radius from the center of rotating plates 420 and 440 to the center of water outlet 149b is R4. At this point, R4 is greater than R2 and less than R3.

[0586] The difference between R3 and R2, D1, is greater than the diameter of the water outlet 149b.

[0587] In addition, the difference D1 between R3 and R2 is formed to be the minimum width W1 smaller than that of the water passage 424.

[0588] When the outer diameter of the rotating plates 420 and 440 is R1, R3 can be greater than half of R1.

[0589] The line that vertically connects the first rotation center C1 and the center line A1 of the first flow path 112 can be called the first connecting line A6, and the line that vertically connects the second rotation center C2 and the center line A1 of the first flow path 112 can be called the second connecting line A7.

[0590] At this time, the first connecting line A6 and the second connecting line A7 can be located in the area between a pair of nozzles 149 used to supply water to each of the rotating cleaning units 40 and 41.

[0591] In other words, the horizontal distance D3 from the water outlet 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 rotating plate 420 and 440 to the center line A2 of the second flow path 114.

[0592] This is because the second flow path 114 extends in the front-to-back direction in the central part of the nozzle 1, thereby preventing water from being drawn into the nozzle 1 via the second flow path 114 during the rotation of the rotating plate 420.

[0593] The horizontal distance between the water outlet 149b and the center line A1 of the first flow path 112 is shorter than the horizontal distance between the rotation center C1 and C2 and the center line A1 of the first flow path 112.

[0594] The water outlet 149b is opposite to the axes A3 and A4 of the drive motors 182 and 184, relative to the connecting lines A6 and A7.

[0595] Meanwhile, valve 230 may include a movable unit 234, an opening and closing unit 238, and a fixed unit 232.

[0596] The fixing unit 232 can be fixed to the fixing rib 217 that protrudes upward from the first body 210 of the water tank 200.

[0597] The fixed unit 232 may have an opening 232a through which the movable unit 234 passes.

[0598] With the fixed unit 232 connected to the fixed rib 217, the fixed unit 232 restricts the movable unit 234 from moving upward from the fixed unit 232 to a predetermined height.

[0599] The movable unit 234 can move vertically with a portion of it passing through the opening 232a. Water can pass through the opening 232a when the movable unit 234 is moving upwards.

[0600] The movable unit 234 may include: a first extension portion 234a that extends downward and is connected to the opening / closing unit 238; and a second extension portion 234b that extends upward and passes through the opening 232a.

[0601] The movable unit 234 can be elastically supported by the 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, while the other end can be supported by the movable unit 234.

[0602] The elastic member 236 provides a force to the movable unit 234 to move the movable unit 234 downward.

[0603] The opening / closing unit 238 can selectively open the outlet 216 by moving the movable unit 234 up and down.

[0604] At least a portion of the diameter of the opening and closing unit 238 may be larger than the diameter of the outlet 216, thereby the opening and closing unit 238 may block the outlet 216.

[0605] The opening and closing unit 238 can be formed of, for example, a rubber material, thereby preventing water leakage when the opening and closing unit 238 blocks the outlet 216.

[0606] The elastic force of the elastic member 236 is applied to the movable unit 234, so that the opening and closing unit 238 can maintain the state of blocking the outlet 216 unless an external force is applied to the movable unit 234.

[0607] During the process of placing the water tank 200 onto the suction nozzle body 10, the movable unit 234 can be moved by means of the valve operating unit 144.

[0608] As described above, the valve operating unit 144 is connected to the nozzle cover 130 from below.

[0609] The valve operating unit 144 may include a pressing portion 144a passing through the water inlet 145. The pressing portion 144a may protrude upward from the bottom of the nozzle cover 130 while passing through the water inlet 145 of the nozzle cover 130.

[0610] The valve operating unit 144 can form a water supply path together with the bottom of the suction nozzle cover 130. The connecting pipe 144c for connecting the first supply pipe 282 can be provided on one side of the valve operating unit 144.

[0611] The diameter of the water inlet 145 can be larger than the outer diameter of the pressing part 144a, so that water can flow smoothly when the pressing part 144a passes through the water inlet 145.

[0612] When the water tank 200 is placed on the nozzle body 10, the pressing part 144a is pulled into the outlet 216 of the water tank 200. During the process of the pressing part 144a being pulled into the outlet 216 of the water tank 200, the pressing part 144a presses the movable unit 234.

[0613] The movable unit 234 is lifted, and the opening / closing unit 238 connected to the movable unit 234 moves upward together with the movable unit 234 to separate from the outlet 216, thereby opening the outlet 216.

[0614] Water in the water tank 200 is discharged through the outlet 216 and absorbed into the absorption member 147 in the valve operating unit 144 via the water opening 145. The water absorbed by the absorption member 147 is supplied to the first supply pipe 282 connected to the connecting pipe 144c.

[0615] Water supplied to the first supply pipe 282 flows into the second supply pipe 284 after being pumped into the water pump 270. Water flowing into the second supply pipe 284 flows to the first branch pipe 286 and the second branch pipe 287 via connector 285. Water flowing into each of the branch pipes 286 and 287 is sprayed from nozzle 149 toward the rotating cleaning units 40 and 41.

[0616] Water sprayed from nozzle 149 is supplied to mops 402 and 404 after passing through water holes 424 in rotating plates 420 and 440. Mops 402 and 404 rotate while absorbing the supplied water to wipe the floor.

[0617] In this 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, water can be prevented from suddenly flowing into the connector 285.

[0618] In this case, the water pressure is concentrated on one of the first branch pipe 286 and the second branch pipe 287, and water is prevented from entering the branch pipe.

[0619] Figure 41 This is a perspective view showing a suction nozzle for a cleaner, separated from the connecting tube according to an embodiment of the invention, as viewed from the rear. Figure 42 It is shown Figure 41 A sectional view of area 'A' in the diagram, and Figure 43 It is shown Figure 42 A 3D view of the washer.

[0620] refer to Figures 41 to 43 The water tank 200 may have at least one vent 219 for introducing external air. In the following text, for example, one vent 219 is formed in the water tank 200, but multiple vents 219 may be provided.

[0621] The vent 219 can be formed on one side of the water tank 200. For example, the vent 219 can be formed in either of a pair of front and rear extending walls 215b facing each other in the water tank 200.

[0622] Although a pair of front and rear extension walls 215b are spaced apart to define a space and the connecting pipe 50 is located in the space, the portions of the front and rear extension walls 215b with vents 219 are spaced apart, thereby enabling air to be supplied smoothly to the vents 219.

[0623] In detail, the washer 290 can be press-fitted into the vent 219.

[0624] Gasket 290 can guide outside air into the internal space of water tank 200.

[0625] Gasket 290 can be called a check valve because outside air flows into water tank 200, while the water in water tank 200 is interrupted and thus not discharged to the outside.

[0626] Washer 290 can be formed from a material that deforms under external force. For example, washer 290 can be formed from polyethylene material, but is not limited to this.

[0627] Washer 290 may include, for example, a cylindrical body 293.

[0628] One end of the main body 293 can be received inside the water tank 200 via the vent 219. The other end of the main body 293 can be exposed outside the water tank 200.

[0629] At least one sealing protrusion 294 and 295 may be formed on the outer side of the body 293. The outer diameter of the sealing protrusion 294 and 295 may be larger than the inner diameter of the vent 219. When the sealing protrusion 294 and 295 are formed as described above, leakage between the body 293 and the vent 219 can be prevented.

[0630] In the case where multiple sealing protrusions 294 and 295 are formed, a portion of the sealing protrusions 294 and 295 may be located inside the water tank 200.

[0631] At the other end of the body 293, a flange 292 may be formed with an outer diameter larger than that of the body 293 and the sealing protrusions 294 and 295. The diameter of the flange 292 is larger than that of the vent 219. The flange 292 is used to prevent the entire gasket 290 from entering the interior of the water tank 200.

[0632] Additionally, the gasket 290 may have an airflow path 291 through which air flows in its central portion, and a slit 297 may be formed at the other end of the gasket 290. In this case, the other end of the gasket 290 may come into contact with the water in the water tank 200.

[0633] In addition, in order to block the slit 297 formed at the other end of the washer 290 by the pressure of water, the washer 290 is formed such that the cross-sectional area of ​​the washer 290 decreases from one point to the other end, so that an inclined surface 296 can be formed on the outside.

[0634] In detail, the inclined surface 296 can be formed on both sides of the slit 297.

[0635] According to one embodiment, water pressure is applied to an inclined surface 296 formed at the other end of the washer 290, so the other end of the washer 290 contracts inward. During this process, the slit 297 is blocked without the internal pressure of the water tank 200 decreasing (without water being discharged).

[0636] Therefore, water in the water tank 200 is prevented from leaking to the outside through the slit 297.

[0637] In addition, the slit 297 is blocked by the water pressure of the water tank 200, so that air is not supplied to the interior of the water tank 200 through the slit 297 when no external force is applied to the gasket 290.

[0638] At the same time, when the internal pressure of the water tank 200 is reduced (in the state of water discharge), external air can be supplied to the water tank 200 through the gasket 290.

[0639] Specifically, when the pump motor 280 operates, the water in the water tank 200 is discharged through the outlet 216 by the water pump 270. The internal pressure of the water tank 200 drops instantaneously.

[0640] As the pressure applied to the inclined surface 296 of the washer 290 decreases, the other end of the washer 290 returns to its initial state and is able to open the slit 297.

[0641] As described above, when the slit 297 is open, outside air can be supplied to the water tank 200 through the slit 297.

[0642] With the slit 297 open, the surface tension of the water around the slit 297 and the force that allows external air to flow are greater than the water pressure in the water tank 200, so water does not drain out of the water tank 200 through the slit 297.

[0643] According to this embodiment, when the water pump 270 is not in operation, it is possible to prevent water in the water tank 200 from being discharged to the outside through the gasket 290.

[0644] In addition, when the water pump 270 is in operation, air can be introduced into the water tank 200 through the slit 297 of the washer 290, so the water in the water tank 200 can be stably supplied to the mops 402 and 404.

Claims

1. A suction nozzle for a cleaner, the suction nozzle comprising: The nozzle housing includes: Suction nozzle base; and A nozzle cover, the nozzle cover being connected to the upper side of the nozzle base, the nozzle cover including a bottom wall recessed toward the nozzle base; A flow path forming portion is located between the nozzle cover and the nozzle base, and the flow path forming portion forms a suction flow path extending along the front-back direction of the nozzle housing; A connecting tube is disposed on the rear side of the nozzle housing; A water tank, wherein the water tank is disposed on the nozzle cover; and Multiple rotating cleaning units are arranged on the bottom side of the nozzle base and spaced apart from each other in the left-right direction of the nozzle housing. Each of the multiple rotating cleaning units includes a rotating plate configured to be connected to a mop. The bottom wall includes: A first bottom wall surface, the first bottom wall surface being located on the front side of the nozzle cover; The second bottom wall surface, located behind the nozzle cap, is closer to the connecting tube than the first bottom wall surface; and A drive unit cover that extends between a portion of the first bottom wall surface and a portion of the second bottom wall surface.

2. The suction nozzle according to claim 1, wherein, The second bottom wall surface is positioned higher than the first bottom wall surface, and A portion of the drive unit cover is positioned above the surface of the second bottom wall.

3. The suction nozzle according to claim 2, wherein, The second bottom wall surface is spaced apart from the connecting pipe.

4. The suction nozzle according to claim 2, further comprising a water pump located on the surface of the first bottom wall, the water pump being configured to discharge water from the water tank. in, The second bottom wall surface is located above the water pump.

5. The suction nozzle according to claim 1, wherein, The water tank is positioned on the bottom wall of the nozzle cover, and the water tank forms the appearance of the nozzle.

6. The suction nozzle according to claim 1, wherein, The flow path forming portion extends from the connecting tube to the nozzle base.

7. The suction nozzle according to claim 1, wherein, The nozzle cover also includes a peripheral wall that extends upward at the edge of the bottom wall.

8. The suction nozzle according to claim 7, wherein, The peripheral wall of the nozzle cover increases in height from the front side to the rear side of the nozzle cover.

9. The suction nozzle according to claim 8, wherein, The water tank includes a pair of front and rear extending walls configured to be spaced apart from each other in the left-right direction of the suction nozzle housing and to form a recessed space. The connecting pipe is disposed in the recessed space.

10. The suction nozzle according to claim 1, further comprising a driving unit, in, The drive unit includes at least one of a motor and gears, and The drive unit cover extends above the drive unit.

11. The suction nozzle according to claim 10, further comprising: A water pump, configured to discharge water from the water tank to the mop, The water pump is mounted on the bottom wall and is located on one side of the suction flow path.

12. The suction nozzle according to claim 11, wherein, The first bottom wall surface is positioned below a portion of the drive unit.

13. The suction nozzle according to claim 11, wherein, The first bottom wall surface includes a seal to prevent water from being supplied from the water tank to the water pump, and The sealing element is spaced apart from the suction flow path.

14. The suction nozzle according to claim 11, wherein, The second bottom wall surface is positioned higher than the first bottom wall surface, and The second bottom wall surface is spaced apart from the connecting pipe.

15. The suction nozzle according to claim 7, wherein, The drive unit cover is configured to be separate from the peripheral wall, thereby forming a space between the drive unit cover and the peripheral wall, and The water tank is positioned in the space.

16. The suction nozzle according to claim 1, wherein, The drive unit cover protrudes from the first bottom wall surface and the second bottom wall surface to cover the drive device for rotating the rotating plate, and The driving device includes a motor.

17. The suction nozzle according to claim 16, wherein, The first bottom wall surface is positioned on the front side of the drive unit cover, and The second bottom wall surface is located on the rear side of the drive unit cover.

18. The suction nozzle according to claim 17, wherein, The second bottom wall surface is positioned below the top surface of the drive unit cover.

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