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.

A power toothbrush includes a handle having a driving system therein. The driving system is responsive to two drive signals. One drive signal produces a clinically effective cleansing action for the teeth, while the other drive signal is arranged to produce audible sounds from the toothbrush which are cognitively stimulating or relaxing.

An electric toothbrush having bristle driven pulsation includes a brush head having a bristle holder and bristle tufts attached to the bristle holder. The bristle tufts and corresponding bristles are disposed at a perpendicular and/or a non-perpendicular angle with respect to a mounting surface of the brush head. The electric toothbrush also includes an electric toothbrush handle removably attached to the brush head. The electric toothbrush handle includes a linear motor configured to drive the bristle holder via a gearing structure coupled to the linear motor and the bristle holder. The linear motor causes the bristle holder to rotate clockwise and counterclockwise at a rotation frequency which exceeds a rotation frequency threshold (e.g., 100 Hz, 120 Hz, etc.). The linear motor also causes the brush head to vibrate in a direction toward and away from a contact surface in synchronization with the rotation of the bristles.

Drivetrain assemblies for personal care devices using electromagnetic components to generate a combination of controllable power tapping and sweeping motions. The drivetrain assemblies include a drivetrain shaft at least partially contained within a body portion of the device. The drivetrain shaft is further configured to engage a brush head member of the device. The drivetrain assemblies further include a motor mounted on the drivetrain shaft, where the motor is configured to periodically rotate the drivetrain shaft about a first axis of the device, and an electromagnetic assembly configured to drive the drivetrain shaft and thereby the brush head member about an second axis of the device or in a direction parallel to a third axis of the device. The electromagnetic assembly includes a stator, a voice coil actuator, a rotor, or a linear solenoid actuator, for example.

An electric toothbrush, including a handle, a motor, and a brush head. The handle defines an accommodating cavity, the motor is driven by electric power, and the motor includes a motor housing and a power shaft, the motor housing is accommodated in the accommodating cavity, the power shaft is movably connected to the motor housing and moves in multi-directions along an axial direction of the motor housing, the power shaft passes through the handle, the brush head is connected to the power shaft and is driven by the power shaft to swing, rotate, and/or vibrate with respect to the handle.

An electric oral cleaning tool, including: a housing, a transmission rod, and a brush head assembly. The brush head assembly is rotatably connected to an end of the housing, and a functional element is arranged on a side of the brush head assembly; a movable disk is arranged on another side of the brush head assembly, and the movable disk has a mating area offset from a center of the brush head assembly. The transmission rod is arranged in the housing and has an input end and an output end; the input end is configured to be connected to a transmission mechanism, and the output end is matched with the mating area; in condition of the output end moving with a variable diameter relative to a center of the movable disk, the output end drives the mating area and the brush head assembly to rotate.

This application provides an oscillating toothbrush, including a brush head, a brush handle, an oscillating base mounted on the brush handle, and an oscillating rod that connects the brush head to the oscillating base, and the oscillating base includes a first hinge base hinged to the brush handle in a first direction, a second hinge base hinged to the brush handle in a second direction, and a fixing shaft mounted on the first hinge base in the second direction, with the first direction being perpendicular to the second direction. In the present application, the oscillating base is arranged to include the first hinge base hinged to the brush handle in the first direction and the second hinge base hinged to the brush handle in the second direction. When the brush head is subjected to an external force, the oscillating rod may drive the first hinge base to oscillate on the brush handle in the first direction. In one embodiment, the oscillating rod oscillates on the fixing shaft in the second direction to further drive the second hinge base to oscillate on the brush handle in the second direction. Therefore, with the oscillation of the first hinge base and the second hinge base, the brush head is allowed to oscillate at multiple angles under external forces in different directions, to improve the comfort of toothbrushing.

Embodiments of the present application relate to the field of oral nursing technologies, and disclose an oral nursing device, a control method, an electronic device, and a storage medium. In the embodiments of the present application, a control assembly can drive an output shaft of an actuation assembly to output plural cleaning motions by outputting a driving signal, so as to drive a cleaning unit to perform a corresponding motion. Therefore, when the output shaft outputs the plurality of cleaning motions, the cleaning unit generates vibrations to clean teeth. Meanwhile, since first angles of some cleaning motions are larger than first angles of adjacent cleaning motions and second angles are smaller than second angles of the adjacent cleaning motions, center positions of swing angles of these cleaning motions differ from center positions of swing angles of the adjacent cleaning motions.

The present disclosure provides an electric toothbrush, comprising: a support frame provided with a hollow part; a drive frame, wherein the drive frame is elastically connected to the support frame, the drive frame is located in the hollow part, the drive frame and the support frame are spaced apart, the drive frame has a drive shaft connector for connecting a toothbrush head; and a motor, wherein the motor is provided on the drive frame, the motor is able to drive the drive frame to swing or vibrate relative to the support frame during operation, so that the drive shaft connector can drive the toothbrush head to swing or vibrate.