The present invention relates to a cleaner head including: a front housing and a rear housing disposed side by side on front and rear sides thereof respectively, the rear housing having an air outlet formed thereon; a front brush rotatably disposed on the front housing in such a manner as to be exposed from the underside of the front housing; a rear brush rotatably disposed the rear housing in such a manner as to be exposed from the underside of the rear housing; driving motors built in the rear housing to rotate the front brush and the rear brush through a power transmission mechanism; a lifting unit disposed on one side of the rear housing to move up and down the front housing with respect to the rear housing in a hinged manner; and a sensing part disposed on any one of the front housing and the rear housing and a part to be sensed disposed on the other, wherein when the front housing is stretched out with respect to the rear housing, rotating power is transferred to the front brush from the corresponding driving motor, and when the front housing is lifted, the rotating power transferred to the front brush cuts off to stop the rotation of the front brush.

The present invention relates to a cleaner head including: front housing and a rear housing disposed side by side on front and rear sides thereof respectively, the rear housing having an air outlet formed thereon; a front brush rotatably disposed on the front housing in such a manner as to be exposed from the underside of the front housing; a rear brush rotatably disposed the rear housing in such a manner as to be exposed from the underside of the rear housing; driving motors built in the rear housing to rotate the front brush and the rear brush through a power transmission mechanism; and a lifting unit disposed on one side of the rear housing to move up and down the front housing with respect to the rear housing in a hinged manner, whereby if necessary, the front brush is lifted or stretched out to come into contact with the floor, thereby optimally maintaining cleaning effects according to places, minimizing a resistance occurring while moving, and reducing an area occupying the floor while being kept in a given place.

Embodiments of the disclosure relate to a robot cleaner and a controlling method thereof, and more particularly, to a robot cleaner and a traveling algorithm of a robot cleaner having an improved structure. A robot cleaner of the disclosure includes a brush unit having a suction flow path, a body unit configured to have a driving device, and be coupled to the brush unit to be rotatable with respect to the brush unit and a redirection device configured to rotate the body unit relative to the brush unit, and the redirection device includes a rotation guide extending along an inner circumferential surface of the brush unit, a rotation driving source disposed in the body unit and generating power, and a power transmission member which moves along the rotation guide by the power transmitted from the rotation driving source and rotates the body unit with respect to the brush unit.

An autonomous cleaner includes a side brush that is provided to a bottom face of a body and sweeps up dust on a floor surface and a napped cleaning fabric that is provided in a rotating region of the side brush and wipes off the dust attached to the side brush. The side brush includes a brush shaft disposed at a position that is a predetermined distance above the floor surface and a pair of bristle bundles having different lengths. A shorter bristle bundle in the pair has a length that is sufficient to bring at least a tip end portion of the shorter bristle bundle into contact with the napped cleaning fabric. In this way, the dust attached to the side brush is wiped off by the napped cleaning fabric, which prevents the dust from being swept outside the body due to a centrifugal force. In addition, by disposing the brush shaft at a predetermined distance from the floor surface, it is possible to suppress entanglement with a carpet and the like and avoid a collision with a step. As a result, it is possible to provide the autonomous cleaner having a longer life and requiring infrequent maintenance.

A floor cleaner including a base that includes a suction inlet, a brushroll chamber, and brushroll. The base further includes a brushroll cover releaseably attached to the base, the brushroll cover removable to access the brushroll chamber. The brushroll chamber includes a brushroll, an endcap, a tab extending from the endcap, a driven end and a non-driven end. The endcap includes the tab extending from the endcap. The tab is movable between an unfolded and a folded position. Upward movement of the tab in the unfolded position removes the brushroll from the brushroll chamber.

A wheel driving device includes: a motor rotating a shaft: an input gear fixed to the shaft; at least one transmission gear meshed with the input gear to transmit power of the motor; and a final gear meshed with the transmission gear and connected with a wheel via an axis to transmit the power from the transmission gear to the wheel. The wheel driving device includes an extraction gear meshed with the final gear or the transmission gear, and a power transmission part connected with the extraction gear to transmit the power from the extraction gear to a cleaner head.

A nozzle of a cleaner includes a nozzle body, a rotation cleaning part having a rotation plate to which a rag is attached, a driving device provided in the nozzle body, a water tank, a water supply passage, and a water adjuster of which at least a portion is mounted on the nozzle body at a rear side thereof so as to be exposed to a rear surface or a top surface of the nozzle body. A user standing on the same floor surface as the nozzle body may manipulate the water adjuster by using his or her foot. The water adjuster may be configured to adjust an on/off operation and a rotation speed (e.g., rpm) of the pump motor.

A wet-cleaning appliance, in particular a wet mop, has a cleaning roller, which is mounted in a rotatable manner about a roller axis, and having a roller cover, which encloses the cleaning roller in the circumferential direction, at least in part, and has at least one movable covering element for optionally closing and/or releasing an opening region of the roller cover. In order to prevent residual liquid contained in the roller cover from dripping from the wet-cleaning appliance when the roller cover is opened, the movable covering element has a collecting unit, in particular a collecting container, which has a storage volume for collecting liquid that remains in the roller cover.

A nozzle for a cleaner includes a nozzle housing having a suction flow path through which air containing dust flows, a first rotation cleaning unit and a second rotation cleaning unit located on a bottom side of the nozzle housing, the first rotation cleaning unit and the second rotation cleaning unit being spaced apart from each other in a left-right direction of the nozzle housing, each of the first rotation cleaning unit and the second rotation cleaning unit having a rotation plate, a driving device located in the nozzle housing, and a water tank located on the nozzle housing, the water tank being configured to store water to be supplied to the first rotation cleaning unit and the second rotation cleaning unit. The water tank includes a first chamber, and a second chamber spaced apart from the first chamber in the left-right direction of the nozzle housing.

A surface cleaner including a cleaning head with a rotatable brushroll assembly. The cleaning head further includes a cutting member configured to cut debris from the brushroll assembly.