The present invention relates to an electric toothbrush that includes a head part and a handle part having a shape connectable to the head part and supplying a driving voltage to the head part according to a user's control. The head part may include a toothbrush head formed with a plurality of bristle holes where toothbrush bristles are disposed and a first through hole and a second through hole spaced apart from each other, a head body extending from the toothbrush head and having an inner passage connected to the first through hole and the second through hole, a head cover which closes the inner passage of the head body, and a first electrode rod and a second electrode rod inserted through the inner passage of the head body, whose one ends being positioned in the first through hole and the second through hole, respectively, and the other ends being exposed to the outside through the head cover, respectively.

A cleaning robot includes a housing assembly, a roller brush, a driving module, a dust box, a suction device, a power supply battery and two travelling modules. The housing assembly has a front end and a rear end, and a bottom of the housing assembly is recessed to form a mounting cavity. The roller brush is rotatably arranged in the mounting cavity and can be driven to rotate by the driving module. The two travelling modules are arranged at the rear end of the housing assembly and are spaced from the roller brush in a front-rear direction of the housing assembly.

A cleaning robot includes a housing assembly, a roller brush, a driving module, a dust box, a suction device, a power supply battery and two travelling modules. The housing assembly has a front end and a rear end, and a bottom of the housing assembly is recessed to form a mounting cavity. The roller brush is rotatably arranged in the mounting cavity and can be driven to rotate by the driving module. The two travelling modules are arranged at the rear end of the housing assembly and are spaced from the roller brush in a front-rear direction of the housing assembly.

The present disclosure discloses a cyclonic propping anti-hair-winding roller brush body, a floor brush and a vacuum cleaner. The cyclonic propping anti-hair-winding roller brush body includes a roller brush main body, at least one cleaning rib is arranged on a surface of the roller brush main body, a flow guide groove is formed in the cleaning ribs, the flow guide groove is formed in a side face of the cleaning ribs in a length direction of the roller brush main body, and the flow guide groove is located on one side facing an area where dirt entering the roller brush main body. When the roller brush main body rotates, the dirt can enter the flow guide groove and turn under an action of the flow guide groove.

The present disclosure discloses a cyclonic propping anti-hair-winding roller brush body, a floor brush and a vacuum cleaner. The cyclonic propping anti-hair-winding roller brush body includes a roller brush main body, at least one cleaning rib is arranged on a surface of the roller brush main body, a flow guide groove is formed in the cleaning ribs, the flow guide groove is formed in a side face of the cleaning ribs in a length direction of the roller brush main body, and the flow guide groove is located on one side facing an area where dirt entering the roller brush main body. When the roller brush main body rotates, the dirt can enter the flow guide groove and turn under an action of the flow guide groove.

Provided is a disclosure for a brush for cleaning a surface, where the brush comprises a center core and cleaning material around the center core. Modules are found on the cleaning material, where nodule density on the cleaning material varies. Accordingly, a first nodule density of a first region of the cleaning material is different than a second nodule density of a second region of the cleaning material.

Devices, systems, and methods for applying cosmetic designs to biological subjects are provided. An applicator array device may include a substrate. The applicator array device may also include, a plurality of applicator elements disposed on the substrate, together defining an applicator array. Each applicator element may include an applicator member having a length substantially orthogonal to an outer surface of the substrate, a first portion of the length extending from the outer surface of the substrate and a second portion of the applicator member extending through the substrate. The first portion may define a first end and the second portion may define a second end opposite the first end. Each applicator element may also include an applicator surface defined by the first end.

Devices, systems, and methods for applying cosmetic designs to biological subjects are provided. An applicator array device may include a substrate. The applicator array device may also include, a plurality of applicator elements disposed on the substrate, together defining an applicator array. Each applicator element may include an applicator member having a length substantially orthogonal to an outer surface of the substrate, a first portion of the length extending from the outer surface of the substrate and a second portion of the applicator member extending through the substrate. The first portion may define a first end and the second portion may define a second end opposite the first end. Each applicator element may also include an applicator surface defined by the first end.

The invention relates to a method and a system for treatment of an underwater surface (S) and material removed from it at a cleaning site. The underwater surface is cleaned by a brush device (1), by which effluent containing solid matter removed from the underwater surface in connection with cleaning is conveyed to a treatment unit (5) where the effluent is subjected to separation and filtering. In a first step, the solid matter contained in the effluent is separated from the effluent in a form as unbroken as possible, immediately followed by a second step in which the effluent is precipitated. Said second step is immediately followed by a third step in which the effluent is filtered. The filtered effluent is discharged directly back to a body of water or to another clean water connection at the cleaning site. The effluent may be subjected to additional filtering and/or disinfection, if necessary.

The invention relates to a method and a system for treatment of an underwater surface (S) and material removed from it at a cleaning site. The underwater surface is cleaned by a brush device (1), by which effluent containing solid matter removed from the underwater surface in connection with cleaning is conveyed to a treatment unit (5) where the effluent is subjected to separation and filtering. In a first step, the solid matter contained in the effluent is separated from the effluent in a form as unbroken as possible, immediately followed by a second step in which the effluent is precipitated. Said second step is immediately followed by a third step in which the effluent is filtered. The filtered effluent is discharged directly back to a body of water or to another clean water connection at the cleaning site. The effluent may be subjected to additional filtering and/or disinfection, if necessary.