An electric toothbrush, including a refill connectable to a handle via a coupling device. The handle has a drive mechanism, and the refill has a brush head and a motion transmitter functionally connected to the brush head for driving it. The handle has a coupling stem terminating with a free end and including a coupling pin extending from the stem. The refill includes a generally tubular portion formed by refill walls defining an interior space for accepting the coupling stem of the handle. The coupling device comprises a pair of mutually opposite and resiliently deformable cantilevered arms disposed adjacent to the refill walls in the interior space of the refill. Each of the cantilevered arms terminates with a coupling surface for engaging the stem's coupling pin for secure and disengageable connection between the handle and the refill.

A powered toothbrush includes a plurality of rows of bristle tufts that project through a perforated top shell of a hollow toothbrush head. Ends of individual bristles are held in buckets to form the tufts and the bristle ends opposite the bucketed ends are free (where the opposite ends contact the toothbrush user's teeth). The bucketed ends of the bristle tufts are captured within the internal space within the head but are not fixedly attached to any other toothbrush component or structure. This non-fixed attachment feature enables the bristle tufts to have multiple degrees of freedom (DoF) of motion with respect to the perforations in the top shell and can rotate, move axially, and tilt.

A replacement head for an electric toothbrush has a simplified drive construction and desired bristle carrier retention. The replacement head includes a neck with a head at one end and a brush shaft disposed within the neck. An eccentric extension extends from the brush shaft parallel with the longitudinal axis and an axial extension extends parallel to the eccentric extension. The eccentric extension engages an angled slot in the bristle carrier to drive the bristle carrier. The brush shaft, including the eccentric extension and the axial extension, may be formed together as a single unitary piece.

The transmission according to the invention for an electric toothbrush serves for the transmission and reforming of a rotational movement provided by an electric motor into a particularly careful and effective cleaning movement of a cleaning element. The ratio of the distance between the longitudinal mid-axis of an output shaft and the longitudinal mid-axis of a drive shaft of the transmission and of the distance between the longitudinal mid-axis of a shaft driving a cam of the transmission and the longitudinal mid-axis of the cam amounts to at least 10:1.

An electric toothbrush rotating replacement head device includes: a toothbrush replacement head body including a toothbrush handle and a toothbrush head. The toothbrush handle defines a cavity, and the toothbrush head is disposed on a top of the cavity. A rotating shaft is disposed in the cavity. The toothbrush head includes: a bristle combination body. A shape of the bristle combination body corresponds to a shape of the toothbrush head. The bristle combination body includes: a first lug boss and a pin, the first lug boss defines a pin installation hole, and the pin is in an interference fit with the pin installation hole. A top edge of the first lug boss is provided with a bristle limiting bone, and a bottom of the first lug boss is provided with a driven gear. The rotating shaft is provided with a driving gear meshed with the driven gear.

Provided is a cleaning device for personal cleaning and care, comprising a cleaning device housing detachably connected to a handle housing, a bracket for supporting the cleaning device, a cleaning element carrier and cleaning elements distributed on the cleaning element carrier, a passive assembly, and a cleaning device transducer. The cleaning device transducer comprises at least two transducer elastic elements; one end of each transducer elastic element is fixedly connected to a corresponding transducer elastic element retainer, and the other end of each transducer elastic element is fixedly connected to an transmission arm of the transducer bracket coupling elastic element; wherein a cleaning device having a natural vibration frequency f.sub.natural is constituted utilizing the bending strain of an elastic material, such that the natural frequency f.sub.natural of the cleaning device is in the range of 100 Hz to 400 Hz, and the relationship between the natural frequency f.sub.natural and the frequency f.sub.0 of the electromagnetic force produced by the drive coil in the handle satisfies: 0.85f.sub.0<f.sub.natural<1.05f.sub.0. The present cleaning device has a compact structure and an aesthetically pleasing shape, rotates steadily, and produces little noise.

An oral care implement having a housing, a functional element mounted at the housing for driven oscillatory rotation relative to the housing around a rotation axis, at least one rocking lever that is on a first end pivotably supported at the housing at an essentially fixed position that is eccentric with respect to the rotation axis and the rocking lever is on a second end coupled with the functional element at a position eccentric with respect to the rotation axis such that the functional element carries the second end of the rocking lever along when it is driven into oscillatory rotation around the rotation axis, while the first end of the rocking lever is kept at its fixed position at the housing.

A brush head for performing reciprocating rotation comprises a driving wheel and a housing on which a top hole and/or a central through hole are/is distributed in a centering manner. The center line(s) of the holes and a rotation axis (L1) of a driving shaft are located at a same line, and the driving shaft penetrates through the central through hole. The fitted region of the driving shaft and the driving wheel enters the through holes distributed on the driving wheel to link the driving shaft and the driving wheel fixedly. A driven part matching a driving part is distributed on a protrusion of the brush disc on which a hollow region is formed. The driving shaft penetrates through or enters the hollow region and limits the brush disc to move. The brush disc is incapable of performing reciprocating rotation when the driving shaft is not installed or is damaged.

A device for converting a rotating motion into a reciprocating motion comprises a motor having a rotatable motor shaft carrying cylindrical component, an embedded cam groove of the cylindrical component, a rod component constrained to travel back and forth and forth, and a cam follower carried on the rod component. The cam follower is engaged in the embedded cam groove track of the cylindrical component so that as the rotatable motor shaft rotates, the cam follower transmits the movement dictated by the embedded cam groove track profile thereby causing the rod component to travel back and forth once for each rotation of rotatable motor shaft. There is also disclosed a mascara applicator assembly; a first electric toothbrush assembly; and a second electric toothbrush assembly comprising such a device.

The transmission according to the invention for an electric toothbrush serves for the transmission and reforming of a rotational movement provided by an electric motor into a particularly careful and effective cleaning movement of a cleaning element. The ratio of the distance between the longitudinal mid-axis of an output shaft and the longitudinal mid-axis of a drive shaft of the transmission and of the distance between the longitudinal mid-axis of a shaft driving a cam of the transmission and the longitudinal mid-axis of the cam amounts to at least 10:1.