An electric toothbrush replacement head is provided and includes a replacement head handle; an opening disposed on an end of the replacement head handle; a transmission connecting part disposed in the opening; at least one through-groove disposed on an edge of the transmission connecting part; a transmission directional elongated groove disposed in the transmission connecting part; reinforced ribs disposed between the transmission connecting part and a portion where the replacement head handle is provided with the opening. The electric toothbrush replacement head with a reasonable structure is easy to replace and stable for using. Furthermore, the electric toothbrush replacement head is convenient, safe and reliable, which can also eliminate motor noise.

This disclosure relates to oral care mouthpieces and methods of forming oral care mouthpieces. A disclosed oral care mouthpiece includes a base shaped to a dental arch. The base elastically deforms in response to pressure variations in the mouthpiece, The mouthpiece also includes a set of one or more supports attached to the base and placed to allow the base to elastically deform in response to the pressure variations in the mouthpiece. The mouthpiece also includes a set of oral care elements attached to the set of one or more supports and placed to transmit pressure to the dental arch when the base elastically deforms in response to the pressure variations in the mouthpiece.

There is provided an electric toothbrush including a toothbrush head, a toothbrush handle and a force sensing array. The force sensing array is arranged on the toothbrush head and/or the toothbrush handle. When the force sensing array is arranged on the toothbrush head, it is able to detect the force uniformity of brush hairs. When the force sensing array is arranged on the toothbrush handle, it is able to control the vibration strength of the brush hairs and detect the pressing force of the brush hairs.

A manual toothbrush that includes a handle, a first brush head, and a second brush head. The handle has a first end, a second end opposite to the first end, a grip disposed between the first and second ends of the handle, and a longitudinal axis extending through the grip, wherein each of the first and second ends is offset to the longitudinal axis. The first brush head is provided at the first end of the handle, the first brush head has a first set of bristles, the first brush head is disposed at a first angle measured relative to the longitudinal axis of the handle. The second brush head is provided at the second end of the handle, the second brush head has a second set of bristles, the second brush head is disposed at a second angle measured relative to the longitudinal axis of the handle.

A manual toothbrush that includes a handle, a first brush head, and a second brush head. The handle has a first end, a second end opposite to the first end, a grip disposed between the first and second ends of the handle, and a longitudinal axis extending through the grip, wherein each of the first and second ends is offset to the longitudinal axis. The first brush head is provided at the first end of the handle, the first brush head has a first set of bristles, the first brush head is disposed at a first angle measured relative to the longitudinal axis of the handle. The second brush head is provided at the second end of the handle, the second brush head has a second set of bristles, the second brush head is disposed at a second angle measured relative to the longitudinal axis of the handle.

Provided are a motor for an electric toothbrush and an electric toothbrush having the same. The motor includes a housing and at least one pair of rotor iron core groups fixed within the housing, wherein each rotor iron core group is formed by stacking a plurality of rotor iron cores, each of the plurality of rotor iron cores includes an iron core main body portion and an iron core convex portion protruding outwards from the periphery of the iron core main body portion; and at least one pair of rotor iron core groups are inserted into two axially extending iron core brackets, and the two iron core brackets are each provided with a clamping groove, with the clamping grooves having openings opposite to each other.

Provided are a motor for an electric toothbrush and an electric toothbrush having the same. The motor includes a housing and at least one pair of rotor iron core groups fixed within the housing, wherein each rotor iron core group is formed by stacking a plurality of rotor iron cores, each of the plurality of rotor iron cores includes an iron core main body portion and an iron core convex portion protruding outwards from the periphery of the iron core main body portion; and at least one pair of rotor iron core groups are inserted into two axially extending iron core brackets, and the two iron core brackets are each provided with a clamping groove, with the clamping grooves having openings opposite to each other.

A method for oral care. In one aspect, the method for oral care includes a) receiving sensor data from at least one sensor configured to detect motion of an oral care device during a brushing routine of a user, the sensor data corresponding to the detected motion; and b) determining a target brushing time based on the sensor data. In another aspect, the method for oral care includes a) receiving sensor data from at least one sensor configured to detect brushing intensity during a brushing routine of a user, the sensor data corresponding to the detected brushing intensity; and b) determining a target brushing time based on the sensor data.

A method for oral care. In one aspect, the method for oral care includes a) receiving sensor data from at least one sensor configured to detect motion of an oral care device during a brushing routine of a user, the sensor data corresponding to the detected motion; and b) determining a target brushing time based on the sensor data. In another aspect, the method for oral care includes a) receiving sensor data from at least one sensor configured to detect brushing intensity during a brushing routine of a user, the sensor data corresponding to the detected brushing intensity; and b) determining a target brushing time based on the sensor data.

A sewer cleaning machine includes a power base with a motor and a drive mechanism, and a drum removably coupled to the power base. The drum includes a cable that is selectively extendable out of the drum and is movable between a first position, in which the drum is supported by the power base and coupled to the drive mechanism, and a second position, in which the drum is separated from the power base.