An electric toothbrush includes a gyro sensor inside a main body. The gyro sensor detects an angular velocity of the main body and the main body includes a head portion, a neck portion, and a grip portion in a longitudinal axis direction. An angle formed by a longitudinal axis of the main body in a state that brush bristles of the head portion contact with a brushing site in a dentition with respect to the longitudinal axis of the main body in a state that the brush bristles of the head portion contact with a reference position in the dentition is obtained, based on an output from the gyro sensor. A corresponding point corresponding to the brushing site on an approximate curve that curves corresponding to the dentition is obtained based on the angle, and coordinates of the corresponding point are used as a translational position of the brushing site.

Roller brushes for a cleaning and/or care devices, for example, for cleaning and/or care of floor coverings in the form of tiles, natural, artificial, blocks of concrete or wood, with a rotationally symmetrical cylinder which comprises a cylinder surface. At least one first plurality of a first bundle of bristles with a first brush and a second plurality of a second bundle of bristles with a second brush may be arranged on the cylinder surface. The first bundle of bristles may be different from the second bundle of bristles.

Roller brushes for a cleaning and/or care devices, for example, for cleaning and/or care of floor coverings in the form of tiles, natural, artificial, blocks of concrete or wood, with a rotationally symmetrical cylinder which comprises a cylinder surface. At least one first plurality of a first bundle of bristles with a first brush and a second plurality of a second bundle of bristles with a second brush may be arranged on the cylinder surface. The first bundle of bristles may be different from the second bundle of bristles.

An oral care implement including a handle and an oral care refill head. The handle has a gripping portion, an engagement component coupled to a distal end of the gripping portion, and a stem. The engagement component includes a plate portion and a first engagement feature. The stem extends through an opening in the engagement component and protrudes from the plate portion. The oral care refill head includes an oral care treatment portion and a sleeve portion. The sleeve portion has an inner surface that defines a sleeve cavity having a cavity axis and a second engagement feature. When the oral care refill head is detachably coupled to the handle, the first and second engagement features mate with one another to at least one of: (1) position the oral care refill head and the handle in an operational alignment; and (2) lock the oral care refill head to the handle.

An oral care system including an oral care device and a processor. The oral care device includes a head having cleaning elements and a vibrational sensor configured to determine vibrational data emitted by the oral care device in use. The processor is operably coupled to the vibrational sensor and is configured to: determine, based on the vibrational data, an applied pressure of the cleaning elements upon an oral cavity of a user; determine an optimal pressure associated with the oral cavity of the user and a non-optimal pressure associated with the oral cavity of the user; and based on the applied pressure of the cleaning elements upon the oral cavity being substantially the non-optimal pressure, cause the applied pressure of the cleaning elements upon the oral cavity to be substantially the optimal pressure.

An oral care system including an oral care device and a processor. The oral care device includes a head having cleaning elements and a vibrational sensor configured to determine vibrational data emitted by the oral care device in use. The processor is operably coupled to the vibrational sensor and is configured to: determine, based on the vibrational data, an applied pressure of the cleaning elements upon an oral cavity of a user; determine an optimal pressure associated with the oral cavity of the user and a non-optimal pressure associated with the oral cavity of the user; and based on the applied pressure of the cleaning elements upon the oral cavity being substantially the non-optimal pressure, cause the applied pressure of the cleaning elements upon the oral cavity to be substantially the optimal pressure.

A cleaner includes a main body and a suction head connected to the main body to suck foreign objects into the main body therethrough, the suction head including a housing including a suction port, and a drum module disposed in the housing, and to be rotated to scatter the foreign objects to be sucked through the suction port so that the scattered foreign objects are drawn into the housing through the suction port, and the drum module including a drum body, a first blade coupled to outer circumference of the drum body, a second blade separated from the first blade in a circumferential direction of the drum body and having a mass greater than a mass of the first blade, and a mass compensation member arranged on the outer circumference of the drum body to compensate for a difference in mass between the first blade and the second blade.

A cleaner includes a main body and a suction head connected to the main body to suck foreign objects into the main body therethrough, the suction head including a housing including a suction port, and a drum module disposed in the housing, and to be rotated to scatter the foreign objects to be sucked through the suction port so that the scattered foreign objects are drawn into the housing through the suction port, and the drum module including a drum body, a first blade coupled to outer circumference of the drum body, a second blade separated from the first blade in a circumferential direction of the drum body and having a mass greater than a mass of the first blade, and a mass compensation member arranged on the outer circumference of the drum body to compensate for a difference in mass between the first blade and the second blade.

A tire shine application system includes a computer having at least one sensor interfaced thereto that detects and measures sizes of a tire of a vehicle as the vehicle enters a car wash. A tire shine applicator is interfaced to a three-directional movement device that is controlled by the computer. When the tire approaches the tire shine applicator, the computer controls the three-directional movement device to position the tire shine applicator to an outwardly facing wall of the tire and controls the three-directional movement device so that the tire shine applicator traverses the outwardly facing wall of the tire while tracking the tire as the tire shine applicator deposits tire shine liquid on the outwardly facing wall of the tire.

A tire shine application system includes a computer having at least one sensor interfaced thereto that detects and measures sizes of a tire of a vehicle as the vehicle enters a car wash. A tire shine applicator is interfaced to a three-directional movement device that is controlled by the computer. When the tire approaches the tire shine applicator, the computer controls the three-directional movement device to position the tire shine applicator to an outwardly facing wall of the tire and controls the three-directional movement device so that the tire shine applicator traverses the outwardly facing wall of the tire while tracking the tire as the tire shine applicator deposits tire shine liquid on the outwardly facing wall of the tire.