US-12616345-B2 - Nozzle for cleaner

US12616345B2US 12616345 B2US12616345 B2US 12616345B2US-12616345-B2

Abstract

The nozzle of a cleaner includes a nozzle main body which has a suction flow path for suctioning air. A plurality of rotation cleaning units are rotatably connected to the nozzle main body, and a plurality of driving devices drive the plurality of rotation cleaning units. A water tank is mounted on the nozzle main body and supplies water to each of the rotation cleaning units. A water supply flow path supplies water from the water tank to each of the rotation cleaning units.

Inventors

Sungjun Kim
Jungwan RYU
Jinhyouk Shin
Ingyu Yang
Jinho Kim
Hyeri KWON
Kyoungho RYOU
Youngsoo Kim

Assignees

LG ELECTRONICS INC.

Dates

Publication Date: 20260505
Application Date: 20190430
Priority Date: 20180430

Claims (18)

1 . A nozzle for a cleaner comprising: a nozzle main body including a suction flow path for suctioning air, and a flow path forming portion disposed at a center of the nozzle main body to cover the suction flow path, wherein the flow path forming portion defines a front-rear suction flow path extending in a front and rear direction relative to the nozzle main body; a first rotation plate and a second rotation plate arranged on a lower side of the nozzle main body and spaced apart from each other in a left and right direction of the nozzle main body, each of the first rotation plate and the second rotation plate supporting a mop; a first driving motor configured to drive the first rotation plate, the first driving motor being disposed to be spaced apart to a left outside from an outer surface of the flow path forming portion; a second driving motor configured to drive the second rotation plate, the second driving motor being disposed to be spaced apart to a right outside from the outer surface of the flow path forming portion; a water tank coupled to the nozzle main body, the water tank being configured to store water to be supplied to each of the first and second rotation plates; and a water supply flow path configured to supply water from the water tank to an upper surface of each of the first and second rotation plates, the water supply flow path being formed in the nozzle main body to be spaced apart from the first driving motor and the second driving motor, the water supply flow path being formed to supply the water from vertically above the upper surfaces to block water discharged from the water supply flow path from being sucked into the suction flow path, wherein the water supply flow path includes: a first injection nozzle positioned spaced apart to the left outside from the outer surface of the flow path forming portion so that water in the water tank falls on the upper surface of the first rotation plate, the first injection nozzle being disposed to be spaced apart in a vertical direction to face the first rotation plate; and a second injection nozzle positioned spaced apart to the right outside from the outer surface of the flow path forming portion so that water in the water tank falls on the upper surface of the second rotation plate, the second injection nozzle being disposed to be spaced apart in the vertical direction to face the second rotation plate, wherein the first and the second injection nozzles are provided at end portions of the water supply flow path, and pass through a lower surface of the nozzle main body, and are exposed to an outside of the nozzle main body, wherein the nozzle main body further comprises a groove for the first and second injection nozzles having a recessed form configured for positioning each respective injection nozzle exposed to the outside of the nozzle main body, and wherein a nozzle hole through which each respective injection nozzle passes is formed in each groove.
2 . The nozzle of claim 1 , wherein the suction flow path comprises: a first flow path extending in the left and right direction at a front end portion of the nozzle main body, and the front-rear suction flow path extending in the front and rear direction at a central portion of the first flow path, wherein the first and second driving motors are positioned behind the first flow path, and wherein the front-rear suction flow path is positioned between the first driving motor and the second driving motor.
3 . The nozzle of claim 2 , wherein the first and second rotation plates are disposed behind the first flow path.
4 . The nozzle of claim 2 , wherein a central axis bisecting a length from a front to a rear of the nozzle main body is positioned closer to a rotational center of each of the first and second rotation plates than to the first flow path.
5 . The nozzle of claim 1 , wherein the first driving motor has a first motor axis and the second driving motor has a second motor axis, and wherein the first motor axis and the second motor axis are arranged to extend in the front and rear direction.
6 . The nozzle of claim 5 , wherein an imaginary line connecting the first motor axis and the second motor axis passes through the front-rear suction flow path.
7 . The nozzle of claim 5 , wherein the first motor axis is arranged perpendicular to a rotation axis of the first rotation plate, wherein the second motor axis is arranged perpendicular to a rotation axis of the second rotation plate, and wherein the first motor axis and the second motor axis are disposed lower than an uppermost end of the flow path forming portion.
8 . The nozzle of claim 1 , wherein the nozzle main body is configured to receive each of the first and second driving motors, wherein the nozzle main body comprises driving unit covers that protrude upward and cover the first and second driving motors, respectively, and wherein a portion of the water tank surrounds a periphery of the driving unit covers when the water tank is mounted on the nozzle main body.
9 . The nozzle of claim 8 , wherein the nozzle main body further comprises: a nozzle base on which each of the first and second driving motors is seated, and a nozzle cover coupled to the nozzle base to the flow path forming portion and including each of the driving unit covers, and wherein the water tank comprises a receiving space having a recessed form configured to receive each of the driving unit covers.
10 . The nozzle of claim 1 , wherein a portion of the water tank is positioned on both sides of the flow path forming portion.
11 . The nozzle of claim 1 , wherein the water tank comprises: a first chamber positioned above the first driving motor; a second chamber positioned above the second driving motor; and a connection chamber connecting the first chamber and the second chamber in a region between the suction flow path and each of the first and second driving motors.
12 . The nozzle of claim 1 , wherein the mop is attached to a lower surface of each of the rotation plates, and wherein each of the rotation plates is provided with a plurality of water passage holes for allowing water to be discharged from the water supply flow path to pass therethrough.
13 . The nozzle of claim 12 , wherein the plurality of water passage holes are arranged to be circumferentially spaced apart from each other with respect to a rotation center of each of the rotation plates.
14 . The nozzle of claim 1 , wherein the water supply flow path further comprises: a supply pipe fluidly connected to the water tank, a connector connected to the supply pipe, a first branch tube connected to the connector and configured to supply water to the first rotation plate, and a second branch pipe connected to the connector and configured to supply water to the second rotation plate.
15 . The nozzle of claim 14 , further comprising: a water pump for controlling water supply in the water supply flow path; and a pump motor connected to the water pump, wherein the supply pipe comprises a first supply pipe connected to an inlet of the water pump, and a second supply pipe connected to an outlet of the water pump and the connector.
16 . The nozzle of claim 15 , wherein the front-rear suction flow path divides the nozzle main body into a left portion and a right portion, and wherein a discharge port and the water pump are positioned on one of the left and right portions.
17 . The nozzle of claim 16 , wherein the connector is positioned directly above the front-rear suction flow path.
18 . The nozzle of claim 1 , wherein the first and the second injection nozzles are positioned to be spaced apart in a radial direction from a rotation axis of the first rotation plate or a rotation axis of the second rotation plate.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2018-0050059, filed in Korea on Apr. 30, 2018, Korean Patent Application No. 10-2018-0050085, filed in Korea on Apr. 30, 2018, and Korean Patent Application No. 10-2018-0088832, filed in Korea on Jul. 30, 2018, the contents of all of which are hereby incorporated by reference in their entireties. BACKGROUND The present specification relates to a nozzle for a cleaner. The cleaner is a device which suctions or wipes dust or foreign matter in a region to be cleaned to perform a cleaning. Such a cleaner can be classified into a manual cleaner for performing cleaning while a user directly moves the cleaner and an automatic cleaner for performing cleaning while traveling itself. The manual cleaner can be classified into a canister-type cleaner, an upright-type cleaner, a handy-type cleaner, and a stick-type cleaner, according to the type of the cleaner. These cleaners can clean a floor using nozzles. In general, nozzles can be used so as to suction air and dust. According to the type of the nozzle, the nozzle may be attached with a mop to clean a floor with the mop. Korean Patent Registration No. 10-0405244, which is a related art 1, discloses a suction port assembly for a vacuum cleaner. The suction port assembly of the related art 1 includes a suction port main body provided with a suction port. The suction port main body includes a first suction path in the front, a second suction path in the rear, and a guide path formed between the first suction path and the second suction path. A mop is rotatably installed on the lower end of the suction port main body, and a rotation driving unit for driving the mop is provided in the suction port main body. The rotation driving unit includes one rotation motor and gears for transmitting the power of one rotation motor to a plurality of rotating bodies to which mops are attached. Meanwhile, according to the related art 1, since a pair of rotating bodies disposed on both sides of the rotation driving unit are rotated using one rotating motor, if the rotating motor fails or malfunctions, there is a problem that all of the pair of rotating bodies cannot be rotated. In addition, so as to rotate the pair of rotating bodies using the one rotation motor, since the rotation motor is positioned at the center of the suction port main body, it is necessary to design a suction path for preventing interference with the rotation motor, and thus there are disadvantages that the length of the suction path is lengthened and the structure for forming a suction path is complicated. In addition, since the related art 1 does not have a structure for supplying water to a mop, in a case where cleaning is desired to be performed using a mop with water, there is a disadvantage that a user has to directly supply water to a mop. In addition, in a case of the related art 1, since the rotation motor is positioned at the central portion of the suction port main body, it is difficult to form the suction path in the central portion of the suction port main body and if the suction path is formed in the center portion of the suction port main body, there is a disadvantage that the height of the suction port main body is increased. In a case where the height of the suction port main body is increased, there are disadvantages that the suction port main body does not easily enter under the furniture or narrow space and thereby the cleanable area is reduced, and the size of the suction port main body is enlarged as a whole, and thus there is a disadvantage that it inconveniences the user during operation. For example, in a case where the user intends to straighten the suction port main body but the suction port main body is moved eccentrically, there is a disadvantage that the amount of eccentricity is further increased due to the weight of the suction port main body and thus it is difficult for the user to overcome the eccentricity and move the suction port main body back to the original straight path. On the other hand, Korean Patent Laid-Open Publication No. 10-2017-0028765, which is the related art 2, discloses a cleaner. The cleaner disclosed in the related art 2 includes a cleaner main body in which a mop is rotatably installed on a lower portion thereof, a water bottle which is mounted to a handle which is connected to the cleaner main body or the cleaner main body, a water spray nozzle which is installed so as to spray water to the front of the cleaner main body, and a water supply unit for supplying the water in the water tank to the water spray nozzle. In a case of the related art 2, since the water spray nozzle is sprayed forward from a front surface of the cleaner main body, there is a possibility that the sprayed water may wet other nearby structures, not a mop. The water spray nozzle is disposed at the center of the cleaner main body, while the mop is arranged in the