An electric toothbrush head, including: a housing, wherein the housing is provided with a mounting cavity and a mounting hole communicated with the mounting cavity; a transmission assembly, wherein the transmission assembly is arranged in the mounting cavity and comprises a first transmission rod, a second transmission rod and a third transmission rod, one end of the first transmission rod, one end of the second transmission rod and one end of the third transmission rod are rotatably connected through a rotating shaft, and the other end of the third transmission rod is hinged in the mounting cavity; and a cleaning head, wherein the cleaning head is rotatably mounted in the mounting cavity from the mounting hole, a bottom of the cleaning head is eccentrically provided with a first rotating groove, and another end of the second transmission rod is arranged in the first rotating groove.

Disclosed herein is a bidirectional magnetic levitation brush motor device, including a motor housing, a motor shaft and an end cover, wherein the end cover is arranged at a bottom end of the motor housing, shaft holes are formed in axes of the motor housing and the end cover, the motor shaft is arranged between the two shaft holes, bearings are arranged at junctions of the motor shaft with the motor housing and the end cover, the end of the motor shaft that is away from the end cover extends out of the motor housing, and a transmission connection shaft is arranged at a top end of the motor shaft. With regard to the present invention, movement transmission is achieved by means of an electromagnetic effect, and mounting of elastic structures such as a torsion bar and the like is no longer needed.

An electric toothbrush head includes a brush rod, a swing arm, and a tufted block with bristles; the tufted block is movably and limitingly mounted in the housing cavity of the brush rod; the swing arm is mounted in the mounting chamber of the brush rod and is linked to the tufted block; the bottom of the housing cavity is equipped with a rotating shaft, and the bottom of the tufted block is equipped with a rotating hole; guide protrusions are set on both side walls of the tufted block, and the housing cavity is provided with a mounting slot and a guide groove corresponding to the mounting slot to guide the up, down, left, and right movement of the tufted block. The electric toothbrush head achieves vertical and horizontal movement of the tufted block through the cooperation of the guide protrusions and the guide grooves.

An embodiment of a brush head assembly for a powered toothbrush includes a housing, a first brush head supported by the housing, and a second brush head supported by the housing. In addition, the brush head assembly includes a driveshaft positioned in the housing and coupled to the first brush head and the second brush head, the driveshaft having a longitudinal axis. A rotation of the driveshaft about a longitudinal axis is configured to pivot the first brush head and translate the second brush head relative to the housing.

The present disclosure is concerned with an oral hygiene implement having a longitudinal axis, a carrier element mounted for driven movement, a motion transmitter that has a first end for transferring a drive force to the carrier element, which first end is provided at a position being offset from the longitudinal axis, and the motion transmitter has a second end positioned essentially on on the longitudinal axis or is arranged for being positioned essentially on the longitudinal axis during operation, wherein the motion transmitter has a first coupling part comprising the first end, which first coupling part essentially extends along a centre axis arranged at an angle with respect to the longitudinal axis, and a second coupling part comprising the second end, which first coupling part is fixedly connected with a first connecting portion of an elastic pivot element that allows that the first coupling part and the second coupling part can pivot with respect to each other at least in a first pivoting plane spanned by the longitudinal axis and by the centre axis, and wherein the first coupling part is made from a plastics material, including reinforced plastics materials, having a Young's modulus of at least 5000 MPa or from a metal material, and at least the first connecting portion, in particular the whole elastic pivot element, is made from a plastics material having a Young's modulus of not more than 3000 MPa, optionally of not more than 1000 MPa, further optionally of not more than 500 MPa.

A power toothbrush includes a handle portion having a drive system therein for moving a set of bristles with a frequency and amplitude to produce clinically effective cleaning results. A modulation system modulates the drive signal by changing the frequency or duty cycle of the drive signal with a frequency varying modulation signal. The modulation frequency will increase from the start to the conclusion of a brushing event for cognitive stimulation while the modulation frequency will decrease between the start and conclusion of a brushing event for cognitive relaxation.

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 oscillating motor for a personal care appliance that aims to reduce or substantially eliminate vibration transmitted to the appliance handle. In order to reduce vibration in the handle, the oscillating motor in one embodiment includes dual workpiece mounts. Each workpiece mount is moved independently by one of the two output drives or armatures of the oscillating motor. The oscillating motor utilizes dual, counter-oscillating armatures, each armature/inertial device being configured to offset the inertia generated by the other of the armature/inertial device, thereby creating zero or almost zero moments about the oscillating axis of the workpiece.

An oscillating motor for a personal care appliance. The oscillating motor imparts suitable oscillating motion to one or more associated workpieces or workpiece sections via first and second independently moving armatures. The first and second armatures move counter to one another. Each armature/inertial device can be configured to offset the inertia generated by the other of the armature/inertial device, thereby creating zero or almost zero moments about the oscillating axis of the workpiece. The one or more workpiece or workpiece sections can include but is not limited to cleansing brushes, composition applicators, exfoliating brushes, exfoliating discs, toothbrushes, shaving heads, etc.

An approach is provided a device for an electric toothbrush. The device comprises a brush head, a motor and a controller. The brush head has multiple exposed brush sets. The motor is connected to the brush head which is configured for driving the exposed brush sets. The controller drives the motor with a power module, and sensing a current of the motor which drives the motor in a pulse activated mode when the sensed current exceeds the predetermined current threshold. The pulse activated mode will make the bristle tuft rotary motion in a pulsating bristle tuft motions, and a person can be physically noticed through gums and teeth that reminds the person to release the brush pressure. The controller will disable the motor and warn the person if the brush pressure remains in a predetermined period of time.